/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * SCSI SCSA-compliant and not-so-DDI-compliant Tape Driver */ #if defined(lint) && !defined(DEBUG) #define DEBUG 1 #endif #include #include #include #include #include #include #include #include #include #define IOSP KSTAT_IO_PTR(un->un_stats) /* * stats maintained only for reads/writes as commands * like rewind etc skew the wait/busy times */ #define IS_RW(bp) ((bp)->b_bcount > 0) #define ST_DO_KSTATS(bp, kstat_function) \ if ((bp != un->un_sbufp) && un->un_stats && IS_RW(bp)) { \ kstat_function(IOSP); \ } #define ST_DO_ERRSTATS(un, x) \ if (un->un_errstats) { \ struct st_errstats *stp; \ stp = (struct st_errstats *)un->un_errstats->ks_data; \ stp->x.value.ul++; \ } #define FILL_SCSI1_LUN(devp, pkt) \ if ((devp)->sd_inq->inq_ansi == 0x1) { \ int _lun; \ _lun = ddi_prop_get_int(DDI_DEV_T_ANY, (devp)->sd_dev, \ DDI_PROP_DONTPASS, SCSI_ADDR_PROP_LUN, 0); \ if (_lun > 0) { \ ((union scsi_cdb *)(pkt)->pkt_cdbp)->scc_lun = \ _lun; \ } \ } /* * get an available contig mem header, cp. * when big_enough is true, we will return NULL, if no big enough * contig mem is found. * when big_enough is false, we will try to find cp containing big * enough contig mem. if not found, we will ruturn the last cp available. * * used by st_get_contig_mem() */ #define ST_GET_CONTIG_MEM_HEAD(un, cp, len, big_enough) { \ struct contig_mem *tmp_cp = NULL; \ for ((cp) = (un)->un_contig_mem; \ (cp) != NULL; \ tmp_cp = (cp), (cp) = (cp)->cm_next) { \ if (((cp)->cm_len >= (len)) || \ (!(big_enough) && ((cp)->cm_next == NULL))) { \ if (tmp_cp == NULL) { \ (un)->un_contig_mem = (cp)->cm_next; \ } else { \ tmp_cp->cm_next = (cp)->cm_next; \ } \ (cp)->cm_next = NULL; \ (un)->un_contig_mem_available_num--; \ break; \ } \ } \ } #define ST_NUM_MEMBERS(array) (sizeof (array) / sizeof (array[0])) /* * Global External Data Definitions */ extern struct scsi_key_strings scsi_cmds[]; /* * Local Static Data */ static void *st_state; static char *st_label = "st"; #if defined(__i386) || defined(__amd64) /* * We need to use below DMA attr to alloc physically contiguous * memory to do I/O in big block size */ static ddi_dma_attr_t st_contig_mem_dma_attr = { DMA_ATTR_V0, /* version number */ 0x0, /* lowest usable address */ 0xFFFFFFFFull, /* high DMA address range */ 0xFFFFFFFFull, /* DMA counter register */ 1, /* DMA address alignment */ 1, /* DMA burstsizes */ 1, /* min effective DMA size */ 0xFFFFFFFFull, /* max DMA xfer size */ 0xFFFFFFFFull, /* segment boundary */ 1, /* s/g list length */ 1, /* granularity of device */ 0 /* DMA transfer flags */ }; static ddi_device_acc_attr_t st_acc_attr = { DDI_DEVICE_ATTR_V0, DDI_NEVERSWAP_ACC, DDI_STRICTORDER_ACC }; /* set limitation for the number of contig_mem */ static int st_max_contig_mem_num = ST_MAX_CONTIG_MEM_NUM; #endif /* * Tunable parameters * * DISCLAIMER * ---------- * These parameters are intended for use only in system testing; if you use * them in production systems, you do so at your own risk. Altering any * variable not listed below may cause unpredictable system behavior. * * st_check_media_time * * Three second state check * * st_allow_large_xfer * * Gated with ST_NO_RECSIZE_LIMIT * * 0 - Transfers larger than 64KB will not be allowed * regardless of the setting of ST_NO_RECSIZE_LIMIT * 1 - Transfers larger than 64KB will be allowed * if ST_NO_RECSIZE_LIMIT is TRUE for the drive * * st_report_soft_errors_on_close * * Gated with ST_SOFT_ERROR_REPORTING * * 0 - Errors will not be reported on close regardless * of the setting of ST_SOFT_ERROR_REPORTING * * 1 - Errors will be reported on close if * ST_SOFT_ERROR_REPORTING is TRUE for the drive */ static int st_selection_retry_count = ST_SEL_RETRY_COUNT; static int st_retry_count = ST_RETRY_COUNT; static int st_io_time = ST_IO_TIME; static int st_long_timeout_x = ST_LONG_TIMEOUT_X; static int st_space_time = ST_SPACE_TIME; static int st_long_space_time_x = ST_LONG_SPACE_TIME_X; static int st_error_level = SCSI_ERR_RETRYABLE; static int st_check_media_time = 3000000; /* 3 Second State Check */ static int st_max_throttle = ST_MAX_THROTTLE; static clock_t st_wait_cmds_complete = ST_WAIT_CMDS_COMPLETE; static int st_allow_large_xfer = 1; static int st_report_soft_errors_on_close = 1; /* * End of tunable parameters list */ /* * Asynchronous I/O and persistent errors, refer to PSARC/1995/228 * * Asynchronous I/O's main offering is that it is a non-blocking way to do * reads and writes. The driver will queue up all the requests it gets and * have them ready to transport to the HBA. Unfortunately, we cannot always * just ship the I/O requests to the HBA, as there errors and exceptions * that may happen when we don't want the HBA to continue. Therein comes * the flush-on-errors capability. If the HBA supports it, then st will * send in st_max_throttle I/O requests at the same time. * * Persistent errors : This was also reasonably simple. In the interrupt * routines, if there was an error or exception (FM, LEOT, media error, * transport error), the persistent error bits are set and shuts everything * down, but setting the throttle to zero. If we hit and exception in the * HBA, and flush-on-errors were set, we wait for all outstanding I/O's to * come back (with CMD_ABORTED), then flush all bp's in the wait queue with * the appropriate error, and this will preserve order. Of course, depending * on the exception we have to show a zero read or write before we show * errors back to the application. */ extern const int st_ndrivetypes; /* defined in st_conf.c */ extern const struct st_drivetype st_drivetypes[]; #ifdef STDEBUG static int st_soft_error_report_debug = 0; volatile int st_debug = 0; #endif #define ST_MT02_NAME "Emulex MT02 QIC-11/24 " static const struct driver_minor_data { char *name; int minor; } st_minor_data[] = { /* * The top 4 entries are for the default densities, * don't alter their position. */ {"", 0}, {"n", MT_NOREWIND}, {"b", MT_BSD}, {"bn", MT_NOREWIND | MT_BSD}, {"l", MT_DENSITY1}, {"m", MT_DENSITY2}, {"h", MT_DENSITY3}, {"c", MT_DENSITY4}, {"u", MT_DENSITY4}, {"ln", MT_DENSITY1 | MT_NOREWIND}, {"mn", MT_DENSITY2 | MT_NOREWIND}, {"hn", MT_DENSITY3 | MT_NOREWIND}, {"cn", MT_DENSITY4 | MT_NOREWIND}, {"un", MT_DENSITY4 | MT_NOREWIND}, {"lb", MT_DENSITY1 | MT_BSD}, {"mb", MT_DENSITY2 | MT_BSD}, {"hb", MT_DENSITY3 | MT_BSD}, {"cb", MT_DENSITY4 | MT_BSD}, {"ub", MT_DENSITY4 | MT_BSD}, {"lbn", MT_DENSITY1 | MT_NOREWIND | MT_BSD}, {"mbn", MT_DENSITY2 | MT_NOREWIND | MT_BSD}, {"hbn", MT_DENSITY3 | MT_NOREWIND | MT_BSD}, {"cbn", MT_DENSITY4 | MT_NOREWIND | MT_BSD}, {"ubn", MT_DENSITY4 | MT_NOREWIND | MT_BSD} }; /* strings used in many debug and warning messages */ static const char wr_str[] = "write"; static const char rd_str[] = "read"; static const char wrg_str[] = "writing"; static const char rdg_str[] = "reading"; /* default density offsets in the table above */ #define DEF_BLANK 0 #define DEF_NOREWIND 1 #define DEF_BSD 2 #define DEF_BSD_NR 3 /* Sense Key, ASC/ASCQ for which tape ejection is needed */ static struct tape_failure_code { uchar_t key; uchar_t add_code; uchar_t qual_code; } st_tape_failure_code[] = { { KEY_HARDWARE_ERROR, 0x15, 0x01}, { KEY_HARDWARE_ERROR, 0x44, 0x00}, { KEY_HARDWARE_ERROR, 0x53, 0x00}, { KEY_HARDWARE_ERROR, 0x53, 0x01}, { KEY_NOT_READY, 0x53, 0x00}, { 0xff} }; /* clean bit position and mask */ static struct cln_bit_position { ushort_t cln_bit_byte; uchar_t cln_bit_mask; } st_cln_bit_position[] = { { 21, 0x08}, { 70, 0xc0}, { 18, 0x81} /* 80 bit indicates in bit mode, 1 bit clean light is on */ }; /* * architecture dependent allocation restrictions. For x86, we'll set * dma_attr_addr_hi to st_max_phys_addr and dma_attr_sgllen to * st_sgl_size during _init(). */ #if defined(__sparc) static ddi_dma_attr_t st_alloc_attr = { DMA_ATTR_V0, /* version number */ 0x0, /* lowest usable address */ 0xFFFFFFFFull, /* high DMA address range */ 0xFFFFFFFFull, /* DMA counter register */ 1, /* DMA address alignment */ 1, /* DMA burstsizes */ 1, /* min effective DMA size */ 0xFFFFFFFFull, /* max DMA xfer size */ 0xFFFFFFFFull, /* segment boundary */ 1, /* s/g list length */ 512, /* granularity of device */ 0 /* DMA transfer flags */ }; #elif defined(__x86) static ddi_dma_attr_t st_alloc_attr = { DMA_ATTR_V0, /* version number */ 0x0, /* lowest usable address */ 0x0, /* high DMA address range [set in _init()] */ 0xFFFFull, /* DMA counter register */ 512, /* DMA address alignment */ 1, /* DMA burstsizes */ 1, /* min effective DMA size */ 0xFFFFFFFFull, /* max DMA xfer size */ 0xFFFFFFFFull, /* segment boundary */ 0, /* s/g list length */ 512, /* granularity of device [set in _init()] */ 0 /* DMA transfer flags */ }; uint64_t st_max_phys_addr = 0xFFFFFFFFull; int st_sgl_size = 0xF; #endif /* * Configuration Data: * * Device driver ops vector */ static int st_aread(dev_t dev, struct aio_req *aio, cred_t *cred_p); static int st_awrite(dev_t dev, struct aio_req *aio, cred_t *cred_p); static int st_read(dev_t dev, struct uio *uio_p, cred_t *cred_p); static int st_write(dev_t dev, struct uio *uio_p, cred_t *cred_p); static int st_open(dev_t *devp, int flag, int otyp, cred_t *cred_p); static int st_close(dev_t dev, int flag, int otyp, cred_t *cred_p); static int st_strategy(struct buf *bp); static int st_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cred_p, int *rval_p); extern int nulldev(), nodev(); static struct cb_ops st_cb_ops = { st_open, /* open */ st_close, /* close */ st_strategy, /* strategy */ nodev, /* print */ nodev, /* dump */ st_read, /* read */ st_write, /* write */ st_ioctl, /* ioctl */ nodev, /* devmap */ nodev, /* mmap */ nodev, /* segmap */ nochpoll, /* poll */ ddi_prop_op, /* cb_prop_op */ 0, /* streamtab */ D_64BIT | D_MP | D_NEW | D_HOTPLUG | D_OPEN_RETURNS_EINTR, /* cb_flag */ CB_REV, /* cb_rev */ st_aread, /* async I/O read entry point */ st_awrite /* async I/O write entry point */ }; static int stinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result); static int st_probe(dev_info_t *dev); static int st_attach(dev_info_t *dev, ddi_attach_cmd_t cmd); static int st_detach(dev_info_t *dev, ddi_detach_cmd_t cmd); static struct dev_ops st_ops = { DEVO_REV, /* devo_rev, */ 0, /* refcnt */ stinfo, /* info */ nulldev, /* identify */ st_probe, /* probe */ st_attach, /* attach */ st_detach, /* detach */ nodev, /* reset */ &st_cb_ops, /* driver operations */ (struct bus_ops *)0, /* bus operations */ nulldev /* power */ }; /* * Local Function Declarations */ static void st_clean_print(dev_info_t *dev, char *label, uint_t level, char *title, char *data, int len); static int st_doattach(struct scsi_device *devp, int (*canwait)()); static void st_known_tape_type(struct scsi_tape *un); static int st_get_conf_from_st_dot_conf(struct scsi_tape *, char *, struct st_drivetype *); static int st_get_conf_from_st_conf_dot_c(struct scsi_tape *, char *, struct st_drivetype *); static int st_get_default_conf(struct scsi_tape *, char *, struct st_drivetype *); static int st_rw(dev_t dev, struct uio *uio, int flag); static int st_arw(dev_t dev, struct aio_req *aio, int flag); static int st_find_eom(dev_t dev); static int st_check_density_or_wfm(dev_t dev, int wfm, int mode, int stepflag); static int st_ioctl_cmd(dev_t dev, struct uscsi_cmd *, int flag); static int st_mtioctop(struct scsi_tape *un, intptr_t arg, int flag); static void st_start(struct scsi_tape *un); static int st_handle_start_busy(struct scsi_tape *un, struct buf *bp, clock_t timeout_interval); static int st_handle_intr_busy(struct scsi_tape *un, struct buf *bp, clock_t timeout_interval); static int st_handle_intr_retry_lcmd(struct scsi_tape *un, struct buf *bp); static void st_done_and_mutex_exit(struct scsi_tape *un, struct buf *bp); static void st_init(struct scsi_tape *un); static void st_make_cmd(struct scsi_tape *un, struct buf *bp, int (*func)(caddr_t)); static void st_make_uscsi_cmd(struct scsi_tape *, struct uscsi_cmd *, struct buf *bp, int (*func)(caddr_t)); static void st_intr(struct scsi_pkt *pkt); static void st_set_state(struct scsi_tape *un); static void st_test_append(struct buf *bp); static int st_runout(caddr_t); static int st_cmd(dev_t dev, int com, int count, int wait); static int st_set_compression(struct scsi_tape *un); static int st_write_fm(dev_t dev, int wfm); static int st_determine_generic(dev_t dev); static int st_determine_density(dev_t dev, int rw); static int st_get_density(dev_t dev); static int st_set_density(dev_t dev); static int st_loadtape(dev_t dev); static int st_modesense(struct scsi_tape *un); static int st_modeselect(struct scsi_tape *un); static int st_handle_incomplete(struct scsi_tape *un, struct buf *bp); static int st_wrongtapetype(struct scsi_tape *un); static int st_check_error(struct scsi_tape *un, struct scsi_pkt *pkt); static int st_handle_sense(struct scsi_tape *un, struct buf *bp); static int st_handle_autosense(struct scsi_tape *un, struct buf *bp); static int st_decode_sense(struct scsi_tape *un, struct buf *bp, int amt, struct scsi_status *); static int st_report_soft_errors(dev_t dev, int flag); static void st_delayed_cv_broadcast(void *arg); static int st_check_media(dev_t dev, enum mtio_state state); static int st_media_watch_cb(caddr_t arg, struct scsi_watch_result *resultp); static void st_intr_restart(void *arg); static void st_start_restart(void *arg); static int st_gen_mode_sense(struct scsi_tape *un, int page, struct seq_mode *page_data, int page_size); static int st_change_block_size(dev_t dev, uint32_t nblksz); static int st_gen_mode_select(struct scsi_tape *un, struct seq_mode *page_data, int page_size); static int st_tape_init(dev_t dev); static void st_flush(struct scsi_tape *un); static void st_set_pe_errno(struct scsi_tape *un); static void st_hba_unflush(struct scsi_tape *un); static void st_turn_pe_on(struct scsi_tape *un); static void st_turn_pe_off(struct scsi_tape *un); static void st_set_pe_flag(struct scsi_tape *un); static void st_clear_pe(struct scsi_tape *un); static void st_wait_for_io(struct scsi_tape *un); static int st_set_devconfig_page(struct scsi_tape *un, int compression_on); static int st_set_datacomp_page(struct scsi_tape *un, int compression_on); static int st_reserve_release(struct scsi_tape *un, int command); static int st_check_cdb_for_need_to_reserve(struct scsi_tape *un, caddr_t cdb); static int st_check_cmd_for_need_to_reserve(struct scsi_tape *un, uchar_t cmd, int count); static int st_take_ownership(dev_t dev); static int st_check_asc_ascq(struct scsi_tape *un); static int st_check_clean_bit(dev_t dev); static int st_check_alert_flags(dev_t dev); static int st_check_sequential_clean_bit(dev_t dev); static int st_check_sense_clean_bit(dev_t dev); static int st_clear_unit_attentions(dev_t dev_instance, int max_trys); static void st_calculate_timeouts(struct scsi_tape *un); static writablity st_is_drive_worm(struct scsi_tape *un); static int st_read_attributes(struct scsi_tape *un, uint16_t attribute, caddr_t buf, size_t size); static int st_get_special_inquiry(struct scsi_tape *un, uchar_t size, caddr_t dest, uchar_t page); #if defined(__i386) || defined(__amd64) /* * routines for I/O in big block size */ static void st_release_contig_mem(struct scsi_tape *un, struct contig_mem *cp); static struct contig_mem *st_get_contig_mem(struct scsi_tape *un, size_t len, int alloc_flags); static int st_bigblk_xfer_done(struct buf *bp); static struct buf *st_get_bigblk_bp(struct buf *bp); #endif /* * error statistics create/update functions */ static int st_create_errstats(struct scsi_tape *, int); static int st_validate_tapemarks(struct scsi_tape *un, int fileno, daddr_t bn); #ifdef STDEBUG static void st_debug_cmds(struct scsi_tape *un, int com, int count, int wait); static char *st_dev_name(dev_t dev); #endif /* STDEBUG */ #if !defined(lint) _NOTE(SCHEME_PROTECTS_DATA("unique per pkt", scsi_pkt buf uio scsi_cdb uscsi_cmd)) _NOTE(SCHEME_PROTECTS_DATA("unique per pkt", scsi_extended_sense scsi_status)) _NOTE(SCHEME_PROTECTS_DATA("stable data", scsi_device)) _NOTE(DATA_READABLE_WITHOUT_LOCK(st_drivetype scsi_address)) #endif /* * autoconfiguration routines. */ char _depends_on[] = "misc/scsi"; static struct modldrv modldrv = { &mod_driverops, /* Type of module. This one is a driver */ "SCSI tape Driver %I%", /* Name of the module. */ &st_ops /* driver ops */ }; static struct modlinkage modlinkage = { MODREV_1, &modldrv, NULL }; /* * Notes on Post Reset Behavior in the tape driver: * * When the tape drive is opened, the driver attempts to make sure that * the tape head is positioned exactly where it was left when it was last * closed provided the medium is not changed. If the tape drive is * opened in O_NDELAY mode, the repositioning (if necessary for any loss * of position due to reset) will happen when the first tape operation or * I/O occurs. The repositioning (if required) may not be possible under * certain situations such as when the device firmware not able to report * the medium change in the REQUEST SENSE data because of a reset or a * misbehaving bus not allowing the reposition to happen. In such * extraordinary situations, where the driver fails to position the head * at its original position, it will fail the open the first time, to * save the applications from overwriting the data. All further attempts * to open the tape device will result in the driver attempting to load * the tape at BOT (beginning of tape). Also a warning message to * indicate that further attempts to open the tape device may result in * the tape being loaded at BOT will be printed on the console. If the * tape device is opened in O_NDELAY mode, failure to restore the * original tape head position, will result in the failure of the first * tape operation or I/O, Further, the driver will invalidate its * internal tape position which will necessitate the applications to * validate the position by using either a tape positioning ioctl (such * as MTREW) or closing and reopening the tape device. * */ int _init(void) { int e; if (((e = ddi_soft_state_init(&st_state, sizeof (struct scsi_tape), ST_MAXUNIT)) != 0)) { return (e); } if ((e = mod_install(&modlinkage)) != 0) { ddi_soft_state_fini(&st_state); } #if defined(__x86) /* set the max physical address for iob allocs on x86 */ st_alloc_attr.dma_attr_addr_hi = st_max_phys_addr; /* * set the sgllen for iob allocs on x86. If this is set less than * the number of pages the buffer will take (taking into account * alignment), it would force the allocator to try and allocate * contiguous pages. */ st_alloc_attr.dma_attr_sgllen = st_sgl_size; #endif return (e); } int _fini(void) { int e; if ((e = mod_remove(&modlinkage)) != 0) { return (e); } ddi_soft_state_fini(&st_state); return (e); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } static int st_probe(dev_info_t *devi) { int instance; struct scsi_device *devp; int rval; #if !defined(__sparc) char *tape_prop; int tape_prop_len; #endif /* If self identifying device */ if (ddi_dev_is_sid(devi) == DDI_SUCCESS) { return (DDI_PROBE_DONTCARE); } #if !defined(__sparc) /* * Since some x86 HBAs have devnodes that look like SCSI as * far as we can tell but aren't really SCSI (DADK, like mlx) * we check for the presence of the "tape" property. */ if (ddi_prop_op(DDI_DEV_T_NONE, devi, PROP_LEN_AND_VAL_ALLOC, DDI_PROP_CANSLEEP, "tape", (caddr_t)&tape_prop, &tape_prop_len) != DDI_PROP_SUCCESS) { return (DDI_PROBE_FAILURE); } if (strncmp(tape_prop, "sctp", tape_prop_len) != 0) { kmem_free(tape_prop, tape_prop_len); return (DDI_PROBE_FAILURE); } kmem_free(tape_prop, tape_prop_len); #endif devp = ddi_get_driver_private(devi); instance = ddi_get_instance(devi); if (ddi_get_soft_state(st_state, instance) != NULL) { return (DDI_PROBE_PARTIAL); } /* * Turn around and call probe routine to see whether * we actually have a tape at this SCSI nexus. */ if (scsi_probe(devp, NULL_FUNC) == SCSIPROBE_EXISTS) { /* * In checking the whole inq_dtype byte we are looking at both * the Peripheral Qualifier and the Peripheral Device Type. * For this driver we are only interested in sequential devices * that are connected or capable if connecting to this logical * unit. */ if (devp->sd_inq->inq_dtype == (DTYPE_SEQUENTIAL | DPQ_POSSIBLE)) { ST_DEBUG6(devi, st_label, SCSI_DEBUG, "probe exists\n"); rval = DDI_PROBE_SUCCESS; } else { rval = DDI_PROBE_FAILURE; } } else { ST_DEBUG6(devi, st_label, SCSI_DEBUG, "probe failure: nothing there\n"); rval = DDI_PROBE_FAILURE; } scsi_unprobe(devp); return (rval); } static int st_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) { int instance; int wide; int dev_instance; int ret_status; struct scsi_device *devp; int node_ix; struct scsi_tape *un; devp = ddi_get_driver_private(devi); instance = ddi_get_instance(devi); switch (cmd) { case DDI_ATTACH: if (st_doattach(devp, SLEEP_FUNC) == DDI_FAILURE) { return (DDI_FAILURE); } break; case DDI_RESUME: /* * Suspend/Resume * * When the driver suspended, there might be * outstanding cmds and therefore we need to * reset the suspended flag and resume the scsi * watch thread and restart commands and timeouts */ if (!(un = ddi_get_soft_state(st_state, instance))) { return (DDI_FAILURE); } dev_instance = ((un->un_dev == 0) ? MTMINOR(instance) : un->un_dev); mutex_enter(ST_MUTEX); un->un_throttle = un->un_max_throttle; un->un_tids_at_suspend = 0; un->un_pwr_mgmt = ST_PWR_NORMAL; if (un->un_swr_token) { scsi_watch_resume(un->un_swr_token); } /* * Restart timeouts */ if ((un->un_tids_at_suspend & ST_DELAY_TID) != 0) { mutex_exit(ST_MUTEX); un->un_delay_tid = timeout(st_delayed_cv_broadcast, un, drv_usectohz((clock_t) MEDIA_ACCESS_DELAY)); mutex_enter(ST_MUTEX); } if (un->un_tids_at_suspend & ST_HIB_TID) { mutex_exit(ST_MUTEX); un->un_hib_tid = timeout(st_intr_restart, un, ST_STATUS_BUSY_TIMEOUT); mutex_enter(ST_MUTEX); } ret_status = st_clear_unit_attentions(dev_instance, 5); /* * now check if we need to restore the tape position */ if ((un->un_suspend_fileno > 0) || (un->un_suspend_blkno > 0)) { if (ret_status != 0) { /* * tape didn't get good TUR * just print out error messages */ scsi_log(ST_DEVINFO, st_label, CE_WARN, "st_attach-RESUME: tape failure " " tape position will be lost"); } else { /* this prints errors */ (void) st_validate_tapemarks(un, un->un_suspend_fileno, un->un_suspend_blkno); } /* * there are no retries, if there is an error * we don't know if the tape has changed */ un->un_suspend_fileno = 0; un->un_suspend_blkno = 0; } /* now we are ready to start up any queued I/Os */ if (un->un_ncmds || un->un_quef) { st_start(un); } cv_broadcast(&un->un_suspend_cv); mutex_exit(ST_MUTEX); return (DDI_SUCCESS); default: return (DDI_FAILURE); } un = ddi_get_soft_state(st_state, instance); ST_DEBUG(devi, st_label, SCSI_DEBUG, "st_attach: instance=%x\n", instance); /* * find the drive type for this target */ st_known_tape_type(un); for (node_ix = 0; node_ix < ST_NUM_MEMBERS(st_minor_data); node_ix++) { int minor; char *name; name = st_minor_data[node_ix].name; minor = st_minor_data[node_ix].minor; /* * For default devices set the density to the * preferred default density for this device. */ if (node_ix <= DEF_BSD_NR) { minor |= un->un_dp->default_density; } minor |= MTMINOR(instance); if (ddi_create_minor_node(devi, name, S_IFCHR, minor, DDI_NT_TAPE, NULL) == DDI_SUCCESS) { continue; } ddi_remove_minor_node(devi, NULL); if (un) { cv_destroy(&un->un_clscv); cv_destroy(&un->un_sbuf_cv); cv_destroy(&un->un_queue_cv); cv_destroy(&un->un_state_cv); cv_destroy(&un->un_suspend_cv); cv_destroy(&un->un_tape_busy_cv); if (un->un_sbufp) { freerbuf(un->un_sbufp); } if (un->un_uscsi_rqs_buf) { kmem_free(un->un_uscsi_rqs_buf, SENSE_LENGTH); } if (un->un_mspl) { i_ddi_mem_free((caddr_t)un->un_mspl, NULL); } scsi_destroy_pkt(un->un_rqs); scsi_free_consistent_buf(un->un_rqs_bp); ddi_soft_state_free(st_state, instance); devp->sd_private = NULL; devp->sd_sense = NULL; } ddi_prop_remove_all(devi); return (DDI_FAILURE); } /* * Add a zero-length attribute to tell the world we support * kernel ioctls (for layered drivers) */ (void) ddi_prop_create(DDI_DEV_T_NONE, devi, DDI_PROP_CANSLEEP, DDI_KERNEL_IOCTL, NULL, 0); ddi_report_dev((dev_info_t *)devi); /* * If it's a SCSI-2 tape drive which supports wide, * tell the host adapter to use wide. */ wide = ((devp->sd_inq->inq_rdf == RDF_SCSI2) && (devp->sd_inq->inq_wbus16 || devp->sd_inq->inq_wbus32)) ? 1 : 0; if (scsi_ifsetcap(ROUTE, "wide-xfer", wide, 1) == 1) { ST_DEBUG(devi, st_label, SCSI_DEBUG, "Wide Transfer %s\n", wide ? "enabled" : "disabled"); } /* * enable autorequest sense; keep the rq packet around in case * the autorequest sense fails because of a busy condition * do a getcap first in case the capability is not variable */ if (scsi_ifgetcap(ROUTE, "auto-rqsense", 1) == 1) { un->un_arq_enabled = 1; } else { un->un_arq_enabled = ((scsi_ifsetcap(ROUTE, "auto-rqsense", 1, 1) == 1) ? 1 : 0); } ST_DEBUG(devi, st_label, SCSI_DEBUG, "auto request sense %s\n", (un->un_arq_enabled ? "enabled" : "disabled")); un->un_untagged_qing = (scsi_ifgetcap(ROUTE, "untagged-qing", 0) == 1); /* * XXX - This is just for 2.6. to tell users that write buffering * has gone away. */ if (un->un_arq_enabled && un->un_untagged_qing) { if (ddi_getprop(DDI_DEV_T_ANY, devi, DDI_PROP_DONTPASS, "tape-driver-buffering", 0) != 0) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "Write Data Buffering has been depricated. Your " "applications should continue to work normally.\n" " But, they should ported to use Asynchronous " " I/O\n" " For more information, read about " " tape-driver-buffering " "property in the st(7d) man page\n"); } } un->un_max_throttle = un->un_throttle = un->un_last_throttle = 1; un->un_flush_on_errors = 0; un->un_mkr_pkt = (struct scsi_pkt *)NULL; ST_DEBUG(devi, st_label, SCSI_DEBUG, "throttle=%x, max_throttle = %x\n", un->un_throttle, un->un_max_throttle); /* initialize persistent errors to nil */ un->un_persistence = 0; un->un_persist_errors = 0; /* * Get dma-max from HBA driver. If it is not defined, use 64k */ un->un_maxdma = scsi_ifgetcap(&devp->sd_address, "dma-max", 1); if (un->un_maxdma == -1) { ST_DEBUG(devi, st_label, SCSI_DEBUG, "Receaved a value that looked like -1. Using 64k maxdma"); un->un_maxdma = (64 * 1024); } /* * Get the max allowable cdb size */ un->un_max_cdb_sz = scsi_ifgetcap(&devp->sd_address, "max-cdb-length", 1); if (un->un_max_cdb_sz < CDB_GROUP0) { ST_DEBUG(devi, st_label, SCSI_DEBUG, "HBA reported max-cdb-length as %d\n", un->un_max_cdb_sz); un->un_max_cdb_sz = CDB_GROUP4; /* optimistic default */ } un->un_maxbsize = MAXBSIZE_UNKNOWN; un->un_mediastate = MTIO_NONE; un->un_HeadClean = TAPE_ALERT_SUPPORT_UNKNOWN; /* * initialize kstats */ un->un_stats = kstat_create("st", instance, NULL, "tape", KSTAT_TYPE_IO, 1, KSTAT_FLAG_PERSISTENT); if (un->un_stats) { un->un_stats->ks_lock = ST_MUTEX; kstat_install(un->un_stats); } (void) st_create_errstats(un, instance); return (DDI_SUCCESS); } /* * st_detach: * * we allow a detach if and only if: * - no tape is currently inserted * - tape position is at BOT or unknown * (if it is not at BOT then a no rewind * device was opened and we have to preserve state) * - it must be in a closed state : no timeouts or scsi_watch requests * will exist if it is closed, so we don't need to check for * them here. */ /*ARGSUSED*/ static int st_detach(dev_info_t *devi, ddi_detach_cmd_t cmd) { int instance; int dev_instance; struct scsi_device *devp; struct scsi_tape *un; clock_t wait_cmds_complete; instance = ddi_get_instance(devi); if (!(un = ddi_get_soft_state(st_state, instance))) { return (DDI_FAILURE); } switch (cmd) { case DDI_DETACH: /* * Undo what we did in st_attach & st_doattach, * freeing resources and removing things we installed. * The system framework guarantees we are not active * with this devinfo node in any other entry points at * this time. */ ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_detach: instance=%x, un=%p\n", instance, (void *)un); if (((un->un_dp->options & ST_UNLOADABLE) == 0) || (un->un_ncmds != 0) || (un->un_quef != NULL) || (un->un_state != ST_STATE_CLOSED)) { /* * we cannot unload some targets because the * inquiry returns junk unless immediately * after a reset */ ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "cannot unload instance %x\n", instance); return (DDI_FAILURE); } /* * if the tape has been removed then we may unload; * do a test unit ready and if it returns NOT READY * then we assume that it is safe to unload. * as a side effect, fileno may be set to -1 if the * the test unit ready fails; * also un_state may be set to non-closed, so reset it */ if ((un->un_dev) && /* Been opened since attach */ ((un->un_fileno > 0) || /* Known position not rewound */ (un->un_blkno != 0))) { /* Or within first file */ mutex_enter(ST_MUTEX); /* * Send Test Unit Ready in the hopes that if * the drive is not in the state we think it is. * And the state will be changed so it can be detached. * If the command fails to reach the device and * the drive was not rewound or unloaded we want * to fail the detach till a user command fails * where after the detach will succead. */ (void) st_cmd(un->un_dev, SCMD_TEST_UNIT_READY, 0, SYNC_CMD); /* * After TUR un_state may be set to non-closed, * so reset it back. */ un->un_state = ST_STATE_CLOSED; mutex_exit(ST_MUTEX); } ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "un_status=%x, fileno=%x, blkno=%lx\n", un->un_status, un->un_fileno, un->un_blkno); /* * check again: * if we are not at BOT then it is not safe to unload */ if ((un->un_dev) && /* Been opened since attach */ ((un->un_fileno > 0) || /* Known position not rewound */ (un->un_blkno != 0))) { /* Or within first file */ ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "cannot detach: fileno=%x, blkno=%lx\n", un->un_fileno, un->un_blkno); return (DDI_FAILURE); } /* * Just To make sure that we have released the * tape unit . */ if (un->un_dev && (un->un_rsvd_status & ST_RESERVE) && !DEVI_IS_DEVICE_REMOVED(devi)) { mutex_enter(ST_MUTEX); (void) st_reserve_release(un, ST_RELEASE); mutex_exit(ST_MUTEX); } /* * now remove other data structures allocated in st_doattach() */ ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "destroying/freeing\n"); cv_destroy(&un->un_clscv); cv_destroy(&un->un_sbuf_cv); cv_destroy(&un->un_queue_cv); cv_destroy(&un->un_suspend_cv); cv_destroy(&un->un_tape_busy_cv); if (un->un_hib_tid) { (void) untimeout(un->un_hib_tid); un->un_hib_tid = 0; } if (un->un_delay_tid) { (void) untimeout(un->un_delay_tid); un->un_delay_tid = 0; } cv_destroy(&un->un_state_cv); #if defined(__i386) || defined(__amd64) if (un->un_contig_mem_hdl != NULL) { ddi_dma_free_handle(&un->un_contig_mem_hdl); } #endif if (un->un_sbufp) { freerbuf(un->un_sbufp); } if (un->un_uscsi_rqs_buf) { kmem_free(un->un_uscsi_rqs_buf, SENSE_LENGTH); } if (un->un_mspl) { i_ddi_mem_free((caddr_t)un->un_mspl, NULL); } if (un->un_rqs) { scsi_destroy_pkt(un->un_rqs); scsi_free_consistent_buf(un->un_rqs_bp); } if (un->un_mkr_pkt) { scsi_destroy_pkt(un->un_mkr_pkt); } if (un->un_arq_enabled) { (void) scsi_ifsetcap(ROUTE, "auto-rqsense", 0, 1); } if (un->un_dp_size) { kmem_free(un->un_dp, un->un_dp_size); } if (un->un_stats) { kstat_delete(un->un_stats); un->un_stats = (kstat_t *)0; } if (un->un_errstats) { kstat_delete(un->un_errstats); un->un_errstats = (kstat_t *)0; } devp = ST_SCSI_DEVP; ddi_soft_state_free(st_state, instance); devp->sd_private = NULL; devp->sd_sense = NULL; scsi_unprobe(devp); ddi_prop_remove_all(devi); ddi_remove_minor_node(devi, NULL); ST_DEBUG(0, st_label, SCSI_DEBUG, "st_detach done\n"); return (DDI_SUCCESS); case DDI_SUSPEND: /* * Suspend/Resume * * To process DDI_SUSPEND, we must do the following: * * - check ddi_removing_power to see if power will be turned * off. if so, return DDI_FAILURE * - check if we are already suspended, * if so, return DDI_FAILURE * - check if device state is CLOSED, * if not, return DDI_FAILURE. * - wait until outstanding operations complete * - save tape state * - block new operations * - cancel pending timeouts * */ if (ddi_removing_power(devi)) return (DDI_FAILURE); mutex_enter(ST_MUTEX); /* * Shouldn't already be suspended, if so return failure */ if (un->un_pwr_mgmt == ST_PWR_SUSPENDED) { mutex_exit(ST_MUTEX); return (DDI_FAILURE); } if (un->un_state != ST_STATE_CLOSED) { mutex_exit(ST_MUTEX); return (DDI_FAILURE); } /* * Wait for all outstanding I/O's to complete * * we wait on both ncmds and the wait queue for times * when we are flushing after persistent errors are * flagged, which is when ncmds can be 0, and the * queue can still have I/O's. This way we preserve * order of biodone's. */ wait_cmds_complete = ddi_get_lbolt(); wait_cmds_complete += st_wait_cmds_complete * drv_usectohz(1000000); while (un->un_ncmds || un->un_quef || (un->un_state == ST_STATE_RESOURCE_WAIT)) { if (cv_timedwait(&un->un_tape_busy_cv, ST_MUTEX, wait_cmds_complete) == -1) { /* * Time expired then cancel the command */ mutex_exit(ST_MUTEX); if (scsi_reset(ROUTE, RESET_TARGET) == 0) { mutex_enter(ST_MUTEX); if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } mutex_exit(ST_MUTEX); return (DDI_FAILURE); } else { mutex_enter(ST_MUTEX); break; } } } /* * DDI_SUSPEND says that the system "may" power down, we * remember the file and block number before rewinding. * we also need to save state before issuing * any WRITE_FILE_MARK command. */ if (un->un_fileno < 0) { un->un_suspend_fileno = 0; un->un_suspend_blkno = 0; } else { un->un_suspend_fileno = un->un_fileno; un->un_suspend_blkno = un->un_blkno; } dev_instance = ((un->un_dev == 0) ? MTMINOR(instance) : un->un_dev); /* * Issue a zero write file fmk command to tell the drive to * flush any buffered tape marks */ (void) st_cmd(dev_instance, SCMD_WRITE_FILE_MARK, 0, SYNC_CMD); /* * Because not all tape drives correctly implement buffer * flushing with the zero write file fmk command, issue a * synchronous rewind command to force data flushing. * st_validate_tapemarks() will do a rewind during DDI_RESUME * anyway. */ (void) st_cmd(dev_instance, SCMD_REWIND, 0, SYNC_CMD); /* stop any new operations */ un->un_pwr_mgmt = ST_PWR_SUSPENDED; un->un_throttle = 0; /* * cancel any outstanding timeouts */ if (un->un_delay_tid) { timeout_id_t temp_id = un->un_delay_tid; un->un_delay_tid = 0; un->un_tids_at_suspend |= ST_DELAY_TID; mutex_exit(ST_MUTEX); (void) untimeout(temp_id); mutex_enter(ST_MUTEX); } if (un->un_hib_tid) { timeout_id_t temp_id = un->un_hib_tid; un->un_hib_tid = 0; un->un_tids_at_suspend |= ST_HIB_TID; mutex_exit(ST_MUTEX); (void) untimeout(temp_id); mutex_enter(ST_MUTEX); } /* * Suspend the scsi_watch_thread */ if (un->un_swr_token) { opaque_t temp_token = un->un_swr_token; mutex_exit(ST_MUTEX); scsi_watch_suspend(temp_token); } else { mutex_exit(ST_MUTEX); } return (DDI_SUCCESS); default: ST_DEBUG(0, st_label, SCSI_DEBUG, "st_detach failed\n"); return (DDI_FAILURE); } } /* ARGSUSED */ static int stinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) { dev_t dev; struct scsi_tape *un; int instance, error; switch (infocmd) { case DDI_INFO_DEVT2DEVINFO: dev = (dev_t)arg; instance = MTUNIT(dev); if ((un = ddi_get_soft_state(st_state, instance)) == NULL) return (DDI_FAILURE); *result = (void *) ST_DEVINFO; error = DDI_SUCCESS; break; case DDI_INFO_DEVT2INSTANCE: dev = (dev_t)arg; instance = MTUNIT(dev); *result = (void *)(uintptr_t)instance; error = DDI_SUCCESS; break; default: error = DDI_FAILURE; } return (error); } static int st_doattach(struct scsi_device *devp, int (*canwait)()) { struct scsi_pkt *rqpkt = NULL; struct scsi_tape *un = NULL; int km_flags = (canwait != NULL_FUNC) ? KM_SLEEP : KM_NOSLEEP; int instance; struct buf *bp; size_t rlen; /* * Call the routine scsi_probe to do some of the dirty work. * If the INQUIRY command succeeds, the field sd_inq in the * device structure will be filled in. */ ST_DEBUG(devp->sd_dev, st_label, SCSI_DEBUG, "st_doattach(): probing\n"); if (scsi_probe(devp, canwait) == SCSIPROBE_EXISTS) { /* * In checking the whole inq_dtype byte we are looking at both * the Peripheral Qualifier and the Peripheral Device Type. * For this driver we are only interested in sequential devices * that are connected or capable if connecting to this logical * unit. */ if (devp->sd_inq->inq_dtype == (DTYPE_SEQUENTIAL | DPQ_POSSIBLE)) { ST_DEBUG(devp->sd_dev, st_label, SCSI_DEBUG, "probe exists\n"); } else { /* Something there but not a tape device */ scsi_unprobe(devp); return (DDI_FAILURE); } } else { /* Nothing there */ ST_DEBUG(devp->sd_dev, st_label, SCSI_DEBUG, "probe failure: nothing there\n"); scsi_unprobe(devp); return (DDI_FAILURE); } bp = scsi_alloc_consistent_buf(&devp->sd_address, (struct buf *)NULL, SENSE_LENGTH, B_READ, canwait, NULL); if (!bp) { goto error; } rqpkt = scsi_init_pkt(&devp->sd_address, (struct scsi_pkt *)NULL, bp, CDB_GROUP0, 1, 0, PKT_CONSISTENT, canwait, NULL); if (!rqpkt) { goto error; } devp->sd_sense = (struct scsi_extended_sense *)bp->b_un.b_addr; ASSERT(geterror(bp) == NULL); (void) scsi_setup_cdb((union scsi_cdb *)rqpkt->pkt_cdbp, SCMD_REQUEST_SENSE, 0, SENSE_LENGTH, 0); FILL_SCSI1_LUN(devp, rqpkt); /* * The actual unit is present. * Now is the time to fill in the rest of our info.. */ instance = ddi_get_instance(devp->sd_dev); if (ddi_soft_state_zalloc(st_state, instance) != DDI_SUCCESS) { goto error; } un = ddi_get_soft_state(st_state, instance); ASSERT(un != NULL); un->un_sbufp = getrbuf(km_flags); un->un_uscsi_rqs_buf = kmem_alloc(SENSE_LENGTH, KM_SLEEP); /* * use i_ddi_mem_alloc() for now until we have an interface to allocate * memory for DMA which doesn't require a DMA handle. ddi_iopb_alloc() * is obsolete and we want more flexibility in controlling the DMA * address constraints. */ (void) i_ddi_mem_alloc(devp->sd_dev, &st_alloc_attr, sizeof (struct seq_mode), ((km_flags == KM_SLEEP) ? 1 : 0), 0, NULL, (caddr_t *)&un->un_mspl, &rlen, NULL); if (!un->un_sbufp || !un->un_mspl) { if (un->un_mspl) { i_ddi_mem_free((caddr_t)un->un_mspl, NULL); } ST_DEBUG6(devp->sd_dev, st_label, SCSI_DEBUG, "probe partial failure: no space\n"); goto error; } bzero(un->un_mspl, sizeof (struct seq_mode)); cv_init(&un->un_sbuf_cv, NULL, CV_DRIVER, NULL); cv_init(&un->un_queue_cv, NULL, CV_DRIVER, NULL); cv_init(&un->un_clscv, NULL, CV_DRIVER, NULL); cv_init(&un->un_state_cv, NULL, CV_DRIVER, NULL); #if defined(__i386) || defined(__amd64) cv_init(&un->un_contig_mem_cv, NULL, CV_DRIVER, NULL); #endif /* Initialize power managemnet condition variable */ cv_init(&un->un_suspend_cv, NULL, CV_DRIVER, NULL); cv_init(&un->un_tape_busy_cv, NULL, CV_DRIVER, NULL); rqpkt->pkt_flags |= (FLAG_SENSING | FLAG_HEAD | FLAG_NODISCON); un->un_fileno = -1; rqpkt->pkt_time = st_io_time; rqpkt->pkt_comp = st_intr; un->un_rqs = rqpkt; un->un_sd = devp; un->un_rqs_bp = bp; un->un_swr_token = (opaque_t)NULL; un->un_comp_page = ST_DEV_DATACOMP_PAGE | ST_DEV_CONFIG_PAGE; un->un_wormable = st_is_drive_worm; un->un_suspend_fileno = 0; un->un_suspend_blkno = 0; #if defined(__i386) || defined(__amd64) if (ddi_dma_alloc_handle(ST_DEVINFO, &st_contig_mem_dma_attr, DDI_DMA_SLEEP, NULL, &un->un_contig_mem_hdl) != DDI_SUCCESS) { ST_DEBUG6(devp->sd_dev, st_label, SCSI_DEBUG, "allocation of contiguous memory dma handle failed!"); un->un_contig_mem_hdl = NULL; goto error; } #endif /* * Since this driver manages devices with "remote" hardware, * i.e. the devices themselves have no "reg" properties, * the SUSPEND/RESUME commands in detach/attach will not be * called by the power management framework unless we request * it by creating a "pm-hardware-state" property and setting it * to value "needs-suspend-resume". */ if (ddi_prop_update_string(DDI_DEV_T_NONE, devp->sd_dev, "pm-hardware-state", "needs-suspend-resume") != DDI_PROP_SUCCESS) { ST_DEBUG(devp->sd_dev, st_label, SCSI_DEBUG, "ddi_prop_update(\"pm-hardware-state\") failed\n"); goto error; } if (ddi_prop_create(DDI_DEV_T_NONE, devp->sd_dev, DDI_PROP_CANSLEEP, "no-involuntary-power-cycles", NULL, 0) != DDI_PROP_SUCCESS) { ST_DEBUG(devp->sd_dev, st_label, SCSI_DEBUG, "ddi_prop_create(\"no-involuntary-power-cycles\") " "failed\n"); goto error; } ST_DEBUG6(devp->sd_dev, st_label, SCSI_DEBUG, "probe success\n"); return (DDI_SUCCESS); error: devp->sd_sense = NULL; ddi_remove_minor_node(devp->sd_dev, NULL); if (un) { if (un->un_mspl) { i_ddi_mem_free((caddr_t)un->un_mspl, NULL); } if (un->un_sbufp) { freerbuf(un->un_sbufp); } if (un->un_uscsi_rqs_buf) { kmem_free(un->un_uscsi_rqs_buf, SENSE_LENGTH); } #if defined(__i386) || defined(__amd64) if (un->un_contig_mem_hdl != NULL) { ddi_dma_free_handle(&un->un_contig_mem_hdl); } #endif ddi_soft_state_free(st_state, instance); devp->sd_private = NULL; } if (rqpkt) { scsi_destroy_pkt(rqpkt); } if (bp) { scsi_free_consistent_buf(bp); } if (devp->sd_inq) { scsi_unprobe(devp); } return (DDI_FAILURE); } typedef int (*cfg_functp)(struct scsi_tape *, char *vidpid, struct st_drivetype *); static cfg_functp config_functs[] = { st_get_conf_from_st_dot_conf, st_get_conf_from_st_conf_dot_c, st_get_default_conf }; /* * determine tape type, using tape-config-list or built-in table or * use a generic tape config entry */ static void st_known_tape_type(struct scsi_tape *un) { struct st_drivetype *dp; cfg_functp *config_funct; /* * XXX: Emulex MT-02 (and emulators) predates SCSI-1 and has * no vid & pid inquiry data. So, we provide one. */ if (ST_INQUIRY->inq_len == 0 || (bcmp("\0\0\0\0\0\0\0\0", ST_INQUIRY->inq_vid, 8) == 0)) { (void) strcpy((char *)ST_INQUIRY->inq_vid, ST_MT02_NAME); } un->un_dp_size = sizeof (struct st_drivetype); dp = kmem_zalloc((size_t)un->un_dp_size, KM_SLEEP); un->un_dp = dp; /* * Loop through the configuration methods till one works. */ for (config_funct = &config_functs[0]; ; config_funct++) { if ((*config_funct)(un, ST_INQUIRY->inq_vid, dp)) { break; } } /* * If we didn't just make up this configuration and * all the density codes are the same.. * Set Auto Density over ride. */ if (*config_funct != st_get_default_conf) { /* * If this device is one that is configured and all * densities are the same, This saves doing gets and set * that yield nothing. */ if ((dp->densities[0]) == (dp->densities[1]) && (dp->densities[0]) == (dp->densities[2]) && (dp->densities[0]) == (dp->densities[3])) { dp->options |= ST_AUTODEN_OVERRIDE; } } /* * Store tape drive characteristics. */ un->un_status = 0; un->un_attached = 1; un->un_init_options = dp->options; /* setup operation time-outs based on options */ st_calculate_timeouts(un); /* make sure if we are supposed to be variable, make it variable */ if (dp->options & ST_VARIABLE) { dp->bsize = 0; } scsi_log(ST_DEVINFO, st_label, CE_NOTE, "?<%s>\n", dp->name); } typedef struct { int mask; int bottom; int top; char *name; } conf_limit; static const conf_limit conf_limits[] = { -1, 1, 2, "conf version", -1, MT_ISTS, ST_LAST_TYPE, "drive type", -1, 0, 0xffffff, "block size", ST_VALID_OPTS, 0, ST_VALID_OPTS, "options", -1, 0, 4, "number of densities", -1, 0, UINT8_MAX, "density code", -1, 0, 3, "default density", -1, 0, UINT16_MAX, "non motion timeout", -1, 0, UINT16_MAX, "I/O timeout", -1, 0, UINT16_MAX, "space timeout", -1, 0, UINT16_MAX, "load timeout", -1, 0, UINT16_MAX, "unload timeout", -1, 0, UINT16_MAX, "erase timeout", 0, 0, 0, NULL }; static int st_validate_conf_data(struct scsi_tape *un, int *list, int list_len, const char *conf_name) { int dens; int ndens; int value; int type; int count; const conf_limit *limit = &conf_limits[0]; ST_DEBUG3(ST_DEVINFO, st_label, CE_NOTE, "Checking %d entrys total with %d densities\n", list_len, list[4]); count = list_len; type = *list; for (; count && limit->name; count--, list++, limit++) { value = *list; if (value & ~limit->mask) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s %s value invalid bits set: 0x%X\n", conf_name, limit->name, value & ~limit->mask); *list &= limit->mask; } else if (value < limit->bottom) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s %s value too low: value = %d limit %d\n", conf_name, limit->name, value, limit->bottom); } else if (value > limit->top) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s %s value too high: value = %d limit %d\n", conf_name, limit->name, value, limit->top); } else { ST_DEBUG3(ST_DEVINFO, st_label, CE_CONT, "%s %s value = 0x%X\n", conf_name, limit->name, value); } /* If not the number of densities continue */ if (limit != &conf_limits[4]) { continue; } /* If number of densities is not in range can't use config */ if (value < limit->bottom || value > limit->top) { return (-1); } ndens = min(value, NDENSITIES); if ((type == 1) && (list_len - ndens) != 6) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s conf version 1 with %d densities has %d items" " should have %d", conf_name, ndens, list_len, 6 + ndens); } else if ((type == 2) && (list_len - ndens) != 13) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s conf version 2 with %d densities has %d items" " should have %d", conf_name, ndens, list_len, 13 + ndens); } limit++; for (dens = 0; dens < ndens && count; dens++) { count--; list++; value = *list; if (value < limit->bottom) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s density[%d] value too low: value =" " 0x%X limit 0x%X\n", conf_name, dens, value, limit->bottom); } else if (value > limit->top) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "%s density[%d] value too high: value =" " 0x%X limit 0x%X\n", conf_name, dens, value, limit->top); } else { ST_DEBUG3(ST_DEVINFO, st_label, CE_CONT, "%s density[%d] value = 0x%X\n", conf_name, dens, value); } } } return (0); } static int st_get_conf_from_st_dot_conf(struct scsi_tape *un, char *vidpid, struct st_drivetype *dp) { caddr_t config_list = NULL; caddr_t data_list = NULL; int *data_ptr; caddr_t vidptr, prettyptr, datanameptr; size_t vidlen, prettylen, datanamelen, tripletlen = 0; int config_list_len, data_list_len, len, i; int version; int found = 0; /* * Determine type of tape controller. Type is determined by * checking the vendor ids of the earlier inquiry command and * comparing those with vids in tape-config-list defined in st.conf */ if (ddi_getlongprop(DDI_DEV_T_ANY, ST_DEVINFO, DDI_PROP_DONTPASS, "tape-config-list", (caddr_t)&config_list, &config_list_len) != DDI_PROP_SUCCESS) { return (found); } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_get_conf_from_st_dot_conf(): st.conf has tape-config-list\n"); /* * Compare vids in each triplet - if it matches, get value for * data_name and contruct a st_drivetype struct * tripletlen is not set yet! */ for (len = config_list_len, vidptr = config_list; len > 0; vidptr += tripletlen, len -= tripletlen) { vidlen = strlen(vidptr); prettyptr = vidptr + vidlen + 1; prettylen = strlen(prettyptr); datanameptr = prettyptr + prettylen + 1; datanamelen = strlen(datanameptr); tripletlen = vidlen + prettylen + datanamelen + 3; if (vidlen == 0) { continue; } /* * If inquiry vid dosen't match this triplets vid, * try the next. */ if (strncasecmp(vidpid, vidptr, vidlen)) { continue; } /* * if prettylen is zero then use the vid string */ if (prettylen == 0) { prettyptr = vidptr; prettylen = vidlen; } ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "vid = %s, pretty=%s, dataname = %s\n", vidptr, prettyptr, datanameptr); /* * get the data list */ if (ddi_getlongprop(DDI_DEV_T_ANY, ST_DEVINFO, 0, datanameptr, (caddr_t)&data_list, &data_list_len) != DDI_PROP_SUCCESS) { /* * Error in getting property value * print warning! */ scsi_log(ST_DEVINFO, st_label, CE_WARN, "data property (%s) has no value\n", datanameptr); continue; } /* * now initialize the st_drivetype struct */ (void) strncpy(dp->name, prettyptr, ST_NAMESIZE - 1); dp->length = (int)min(vidlen, (VIDPIDLEN - 1)); (void) strncpy(dp->vid, vidptr, dp->length); data_ptr = (int *)data_list; /* * check if data is enough for version, type, * bsize, options, # of densities, density1, * density2, ..., default_density */ if ((data_list_len < 5 * sizeof (int)) || (data_list_len < 6 * sizeof (int) + *(data_ptr + 4) * sizeof (int))) { /* * print warning and skip to next triplet. */ scsi_log(ST_DEVINFO, st_label, CE_WARN, "data property (%s) incomplete\n", datanameptr); kmem_free(data_list, data_list_len); continue; } if (st_validate_conf_data(un, data_ptr, data_list_len / sizeof (int), datanameptr)) { kmem_free(data_list, data_list_len); scsi_log(ST_DEVINFO, st_label, CE_WARN, "data property (%s) rejected\n", datanameptr); continue; } /* * check version */ version = *data_ptr++; if (version != 1 && version != 2) { /* print warning but accept it */ scsi_log(ST_DEVINFO, st_label, CE_WARN, "Version # for data property (%s) " "not set to 1 or 2\n", datanameptr); } dp->type = *data_ptr++; dp->bsize = *data_ptr++; dp->options = *data_ptr++; dp->options |= ST_DYNAMIC; len = *data_ptr++; for (i = 0; i < NDENSITIES; i++) { if (i < len) { dp->densities[i] = *data_ptr++; } } dp->default_density = *data_ptr << 3; if (version == 2 && data_list_len >= (13 + len) * sizeof (int)) { data_ptr++; dp->non_motion_timeout = *data_ptr++; dp->io_timeout = *data_ptr++; dp->rewind_timeout = *data_ptr++; dp->space_timeout = *data_ptr++; dp->load_timeout = *data_ptr++; dp->unload_timeout = *data_ptr++; dp->erase_timeout = *data_ptr++; } kmem_free(data_list, data_list_len); found = 1; ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "found in st.conf: vid = %s, pretty=%s\n", dp->vid, dp->name); break; } /* * free up the memory allocated by ddi_getlongprop */ if (config_list) { kmem_free(config_list, config_list_len); } return (found); } static int st_get_conf_from_st_conf_dot_c(struct scsi_tape *un, char *vidpid, struct st_drivetype *dp) { int i; /* * Determine type of tape controller. Type is determined by * checking the result of the earlier inquiry command and * comparing vendor ids with strings in a table declared in st_conf.c. */ ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_get_conf_from_st_conf_dot_c(): looking at st_drivetypes\n"); for (i = 0; i < st_ndrivetypes; i++) { if (st_drivetypes[i].length == 0) { continue; } if (strncasecmp(vidpid, st_drivetypes[i].vid, st_drivetypes[i].length)) { continue; } bcopy(&st_drivetypes[i], dp, sizeof (st_drivetypes[i])); return (1); } return (0); } static int st_get_default_conf(struct scsi_tape *un, char *vidpid, struct st_drivetype *dp) { int i; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_get_default_conf(): making drivetype from INQ cmd\n"); /* * Make up a name */ bcopy("Vendor '", dp->name, 8); bcopy(vidpid, &dp->name[8], VIDLEN); bcopy("' Product '", &dp->name[16], 11); bcopy(&vidpid[8], &dp->name[27], PIDLEN); dp->name[ST_NAMESIZE - 2] = '\''; dp->name[ST_NAMESIZE - 1] = '\0'; dp->length = min(strlen(ST_INQUIRY->inq_vid), (VIDPIDLEN - 1)); (void) strncpy(dp->vid, ST_INQUIRY->inq_vid, dp->length); /* * 'clean' vendor and product strings of non-printing chars */ for (i = 0; i < ST_NAMESIZE - 2; i++) { if (dp->name[i] < ' ' || dp->name[i] > '~') { dp->name[i] = '.'; } } dp->type = ST_TYPE_INVALID; dp->options |= (ST_DYNAMIC | ST_UNLOADABLE | ST_MODE_SEL_COMP); return (1); /* Can Not Fail */ } /* * Regular Unix Entry points */ /* ARGSUSED */ static int st_open(dev_t *dev_p, int flag, int otyp, cred_t *cred_p) { dev_t dev = *dev_p; int rval = 0; GET_SOFT_STATE(dev); /* * validate that we are addressing a sensible unit */ mutex_enter(ST_MUTEX); #ifdef STDEBUG ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_open(node = %s dev = 0x%lx, flag = %d, otyp = %d)\n", st_dev_name(dev), *dev_p, flag, otyp); #endif /* * All device accesss go thru st_strategy() where we check * suspend status */ if (!un->un_attached) { st_known_tape_type(un); if (!un->un_attached) { rval = ENXIO; goto exit; } } /* * Check for the case of the tape in the middle of closing. * This isn't simply a check of the current state, because * we could be in state of sensing with the previous state * that of closing. * * And don't allow multiple opens. */ if (!(flag & (FNDELAY | FNONBLOCK)) && IS_CLOSING(un)) { un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSE_PENDING_OPEN; while (IS_CLOSING(un) || un->un_state == ST_STATE_CLOSE_PENDING_OPEN) { if (cv_wait_sig(&un->un_clscv, ST_MUTEX) == 0) { rval = EINTR; un->un_state = un->un_laststate; goto exit; } } } else if (un->un_state != ST_STATE_CLOSED) { rval = EBUSY; goto busy; } /* * record current dev */ un->un_dev = dev; un->un_oflags = flag; /* save for use in st_tape_init() */ un->un_errno = 0; /* no errors yet */ un->un_restore_pos = 0; un->un_rqs_state = 0; /* * If we are opening O_NDELAY, or O_NONBLOCK, we don't check for * anything, leave internal states alone, if fileno >= 0 */ if (flag & (FNDELAY | FNONBLOCK)) { if (un->un_fileno < 0 || (un->un_fileno == 0 && un->un_blkno == 0)) { un->un_state = ST_STATE_OFFLINE; } else if (un->un_fileno > 0 || (un->un_fileno == 0 && un->un_blkno != 0)) { /* * set un_read_only/write-protect status. * * If the tape is not bot we can assume * that mspl->wp_status is set properly. * else * we need to do a mode sense/Tur once * again to get the actual tape status.(since * user might have replaced the tape) * Hence make the st state OFFLINE so that * we re-intialize the tape once again. */ un->un_read_only = (un->un_oflags & FWRITE) ? RDWR : RDONLY; un->un_state = ST_STATE_OPEN_PENDING_IO; } else { un->un_state = ST_STATE_OFFLINE; } rval = 0; } else { /* * Not opening O_NDELAY. */ un->un_state = ST_STATE_OPENING; rval = st_tape_init(dev); if ((rval == EACCES) && (un->un_read_only & WORM)) { un->un_state = ST_STATE_OPEN_PENDING_IO; rval = 0; /* so open doesn't fail */ } else if (rval) { /* * Release the tape unit, if reserved and not * preserve reserve. */ if ((un->un_rsvd_status & (ST_RESERVE | ST_PRESERVE_RESERVE)) == ST_RESERVE) { (void) st_reserve_release(un, ST_RELEASE); } } else { un->un_state = ST_STATE_OPEN_PENDING_IO; } } exit: /* * we don't want any uninvited guests scrogging our data when we're * busy with something, so for successful opens or failed opens * (except for EBUSY), reset these counters and state appropriately. */ if (rval != EBUSY) { if (rval) { un->un_state = ST_STATE_CLOSED; } un->un_err_resid = 0; un->un_retry_ct = 0; un->un_tran_retry_ct = 0; } busy: ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_open: return val = %x, state = %d\n", rval, un->un_state); mutex_exit(ST_MUTEX); return (rval); } static int st_tape_init(dev_t dev) { int err; int rval = 0; GET_SOFT_STATE(dev); ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init(dev = 0x%lx, oflags = %d)\n", dev, un->un_oflags); /* * Clean up after any errors left by 'last' close. * This also handles the case of the initial open. */ if (un->un_state != ST_STATE_INITIALIZING) { un->un_laststate = un->un_state; un->un_state = ST_STATE_OPENING; } un->un_kbytes_xferred = 0; /* * do a throw away TUR to clear check condition */ err = st_cmd(dev, SCMD_TEST_UNIT_READY, 0, SYNC_CMD); /* * If test unit ready fails because the drive is reserved * by another host fail the open for no access. */ if (err) { if (un->un_rsvd_status & ST_RESERVATION_CONFLICT) { un->un_state = ST_STATE_CLOSED; ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init: RESERVATION CONFLICT\n"); rval = EACCES; goto exit; } } /* * See whether this is a generic device that we haven't figured * anything out about yet. */ if (un->un_dp->type == ST_TYPE_INVALID) { rval = st_determine_generic(dev); if (rval) { if (rval != EACCES) { rval = EIO; } un->un_state = ST_STATE_CLOSED; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init: %s invalid type\n", rval == EACCES ? "EACCES" : "EIO"); goto exit; } /* * If this is a Unknown Type drive, * Use the READ BLOCK LIMITS to determine if * allow large xfer is approprate if not globally * disabled with st_allow_large_xfer. */ un->un_allow_large_xfer = (uchar_t)st_allow_large_xfer; } else { /* * If we allow_large_xfer (ie >64k) and have not yet found out * the max block size supported by the drive, * find it by issueing a READ_BLKLIM command. * if READ_BLKLIM cmd fails, assume drive doesn't * allow_large_xfer and min/max block sizes as 1 byte and 63k. */ un->un_allow_large_xfer = st_allow_large_xfer && (un->un_dp->options & ST_NO_RECSIZE_LIMIT); } /* * if maxbsize is unknown, set the maximum block size. */ if (un->un_maxbsize == MAXBSIZE_UNKNOWN) { /* * Get the Block limits of the tape drive. * if un->un_allow_large_xfer = 0 , then make sure * that maxbsize is <= ST_MAXRECSIZE_FIXED. */ un->un_rbl = kmem_zalloc(RBLSIZE, KM_SLEEP); err = st_cmd(dev, SCMD_READ_BLKLIM, RBLSIZE, SYNC_CMD); if (err) { /* Retry */ err = st_cmd(dev, SCMD_READ_BLKLIM, RBLSIZE, SYNC_CMD); } if (!err) { /* * if cmd successful, use limit returned */ un->un_maxbsize = (un->un_rbl->max_hi << 16) + (un->un_rbl->max_mid << 8) + un->un_rbl->max_lo; un->un_minbsize = (un->un_rbl->min_hi << 8) + un->un_rbl->min_lo; un->un_data_mod = 1 << un->un_rbl->granularity; if ((un->un_maxbsize == 0) || (un->un_allow_large_xfer == 0 && un->un_maxbsize > ST_MAXRECSIZE_FIXED)) { un->un_maxbsize = ST_MAXRECSIZE_FIXED; } else if (un->un_dp->type == ST_TYPE_DEFAULT) { /* * Drive is not one that is configured, But the * READ BLOCK LIMITS tells us it can do large * xfers. */ if (un->un_maxbsize > ST_MAXRECSIZE_FIXED) { un->un_dp->options |= ST_NO_RECSIZE_LIMIT; } /* * If max and mimimum block limits are the * same this is a fixed block size device. */ if (un->un_maxbsize == un->un_minbsize) { un->un_dp->options &= ~ST_VARIABLE; } } if (un->un_minbsize == 0) { un->un_minbsize = 1; } } else { /* error on read block limits */ scsi_log(ST_DEVINFO, st_label, CE_NOTE, "!st_tape_init: Error on READ BLOCK LIMITS," " errno = %d un_rsvd_status = 0x%X\n", err, un->un_rsvd_status); /* * since read block limits cmd failed, * do not allow large xfers. * use old values in st_minphys */ if (un->un_rsvd_status & ST_RESERVATION_CONFLICT) { rval = EACCES; } else { un->un_allow_large_xfer = 0; scsi_log(ST_DEVINFO, st_label, CE_NOTE, "!Disabling large transfers\n"); /* * we guess maxbsize and minbsize */ if (un->un_bsize) { un->un_maxbsize = un->un_minbsize = un->un_bsize; } else { un->un_maxbsize = ST_MAXRECSIZE_FIXED; un->un_minbsize = 1; } /* * Data Mod must be set, * Even if read block limits fails. * Prevents Divide By Zero in st_rw(). */ un->un_data_mod = 1; } } if (un->un_rbl) { kmem_free(un->un_rbl, RBLSIZE); un->un_rbl = NULL; } if (rval) { goto exit; } } ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "maxdma = %d, maxbsize = %d, minbsize = %d, %s large xfer\n", un->un_maxdma, un->un_maxbsize, un->un_minbsize, (un->un_allow_large_xfer ? "ALLOW": "DON'T ALLOW")); err = st_cmd(dev, SCMD_TEST_UNIT_READY, 0, SYNC_CMD); if (err != 0) { if (err == EINTR) { un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSED; rval = EINTR; goto exit; } /* * Make sure the tape is ready */ un->un_fileno = -1; if (un->un_status != KEY_UNIT_ATTENTION) { /* * allow open no media. Subsequent MTIOCSTATE * with media present will complete the open * logic. */ un->un_laststate = un->un_state; if (un->un_oflags & (FNONBLOCK|FNDELAY)) { un->un_mediastate = MTIO_EJECTED; un->un_state = ST_STATE_OFFLINE; rval = 0; goto exit; } else { un->un_state = ST_STATE_CLOSED; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init EIO no media, not opened " "O_NONBLOCK|O_EXCL\n"); rval = EIO; goto exit; } } } /* * On each open, initialize block size from drivetype struct, * as it could have been changed by MTSRSZ ioctl. * Now, ST_VARIABLE simply means drive is capable of variable * mode. All drives are assumed to support fixed records. * Hence, un_bsize tells what mode the drive is in. * un_bsize = 0 - variable record length * = x - fixed record length is x */ un->un_bsize = un->un_dp->bsize; if (un->un_restore_pos) { rval = st_validate_tapemarks(un, un->un_save_fileno, un->un_save_blkno); if (rval != 0) { if (rval != EACCES) { rval = EIO; } un->un_restore_pos = 0; un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSED; goto exit; } un->un_restore_pos = 0; } if (un->un_fileno < 0) { rval = st_loadtape(dev); if (rval) { if (rval != EACCES) { rval = EIO; } un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSED; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init: %s can't open tape\n", rval == EACCES ? "EACCES" : "EIO"); goto exit; } } /* * do a mode sense to pick up state of current write-protect, * Could cause reserve and fail due to conflict. */ rval = st_modesense(un); if (rval == EACCES) { goto exit; } /* * If we are opening the tape for writing, check * to make sure that the tape can be written. */ if (un->un_oflags & FWRITE) { err = 0; if (un->un_mspl->wp) { un->un_status = KEY_WRITE_PROTECT; un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSED; rval = EACCES; /* * STK sets the wp bit if volsafe tape is loaded. */ if ((un->un_dp->type == MT_ISSTK9840) && (un->un_dp->options & ST_WORMABLE)) { un->un_read_only = RDONLY; } else { goto exit; } } else { un->un_read_only = RDWR; } } else { un->un_read_only = RDONLY; } if (un->un_dp->options & ST_WORMABLE) { un->un_read_only |= un->un_wormable(un); if (((un->un_read_only == WORM) || (un->un_read_only == RDWORM)) && ((un->un_oflags & FWRITE) == FWRITE)) { un->un_status = KEY_DATA_PROTECT; rval = EACCES; ST_DEBUG4(ST_DEVINFO, st_label, CE_NOTE, "read_only = %d eof = %d oflag = %d\n", un->un_read_only, un->un_eof, un->un_oflags); } } /* * If we're opening the tape write-only, we need to * write 2 filemarks on the HP 1/2 inch drive, to * create a null file. */ if ((un->un_read_only == RDWR) || (un->un_read_only == WORM) && (un->un_oflags & FWRITE)) { if (un->un_dp->options & ST_REEL) { un->un_fmneeded = 2; } else { un->un_fmneeded = 1; } } else { un->un_fmneeded = 0; } ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "fmneeded = %x\n", un->un_fmneeded); /* * Make sure the density can be selected correctly. * If WORM can only write at the append point which in most cases * isn't BOP. st_determine_density() with a B_WRITE only attempts * to set and try densities if a BOP. */ if (st_determine_density(dev, un->un_read_only == RDWR ? B_WRITE : B_READ)) { un->un_status = KEY_ILLEGAL_REQUEST; un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSED; ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init: EIO can't determine density\n"); rval = EIO; goto exit; } /* * Destroy the knowledge that we have 'determined' * density so that a later read at BOT comes along * does the right density determination. */ un->un_density_known = 0; /* * Okay, the tape is loaded and either at BOT or somewhere past. * Mark the state such that any I/O or tape space operations * will get/set the right density, etc.. */ un->un_laststate = un->un_state; un->un_lastop = ST_OP_NIL; un->un_mediastate = MTIO_INSERTED; cv_broadcast(&un->un_state_cv); /* * Set test append flag if writing. * First write must check that tape is positioned correctly. */ un->un_test_append = (un->un_oflags & FWRITE); exit: un->un_err_resid = 0; un->un_last_resid = 0; un->un_last_count = 0; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tape_init: return val = %x\n", rval); return (rval); } /* ARGSUSED */ static int st_close(dev_t dev, int flag, int otyp, cred_t *cred_p) { int err = 0; int norew, count, last_state; #if defined(__i386) || defined(__amd64) struct contig_mem *cp, *cp_temp; #endif GET_SOFT_STATE(dev); /* * wait till all cmds in the pipeline have been completed */ mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close(dev = 0x%lx, flag = %d, otyp = %d)\n", dev, flag, otyp); st_wait_for_io(un); /* turn off persistent errors on close, as we want close to succeed */ TURN_PE_OFF(un); /* * set state to indicate that we are in process of closing */ last_state = un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSING; /* * BSD behavior: * a close always causes a silent span to the next file if we've hit * an EOF (but not yet read across it). */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close1: fileno=%x, blkno=%lx, un_eof=%x\n", un->un_fileno, un->un_blkno, un->un_eof); if (BSD_BEHAVIOR && (un->un_eof == ST_EOF)) { if (un->un_fileno >= 0) { un->un_fileno++; un->un_blkno = 0; } un->un_eof = ST_NO_EOF; } /* * rewinding? */ norew = (getminor(dev) & MT_NOREWIND); /* * SVR4 behavior for skipping to next file: * * If we have not seen a filemark, space to the next file * * If we have already seen the filemark we are physically in the next * file and we only increment the filenumber */ if (norew && SVR4_BEHAVIOR && (flag & FREAD) && (un->un_blkno != 0) && (un->un_lastop != ST_OP_WRITE)) { switch (un->un_eof) { case ST_NO_EOF: /* * if we were reading and did not read the complete file * skip to the next file, leaving the tape correctly * positioned to read the first record of the next file * Check first for REEL if we are at EOT by trying to * read a block */ if ((un->un_dp->options & ST_REEL) && (!(un->un_dp->options & ST_READ_IGNORE_EOFS)) && (un->un_blkno == 0)) { if (st_cmd(dev, SCMD_SPACE, Blk(1), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close : EIO can't space\n"); err = EIO; break; } if (un->un_eof >= ST_EOF_PENDING) { un->un_eof = ST_EOT_PENDING; un->un_fileno += 1; un->un_blkno = 0; break; } } if (st_cmd(dev, SCMD_SPACE, Fmk(1), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close: EIO can't space #2\n"); err = EIO; } else { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close2: fileno=%x,blkno=%lx," "un_eof=%x\n", un->un_fileno, un->un_blkno, un->un_eof); un->un_eof = ST_NO_EOF; } break; case ST_EOF_PENDING: case ST_EOF: un->un_fileno += 1; un->un_blkno = 0; un->un_eof = ST_NO_EOF; break; case ST_EOT: case ST_EOT_PENDING: /* nothing to do */ break; default: scsi_log(ST_DEVINFO, st_label, CE_PANIC, "Undefined state 0x%x", un->un_eof); } } /* * For performance reasons (HP 88780), the driver should * postpone writing the second tape mark until just before a file * positioning ioctl is issued (e.g., rewind). This means that * the user must not manually rewind the tape because the tape will * be missing the second tape mark which marks EOM. * However, this small performance improvement is not worth the risk. */ /* * We need to back up over the filemark we inadvertently popped * over doing a read in between the two filemarks that constitute * logical eot for 1/2" tapes. Note that ST_EOT_PENDING is only * set while reading. * * If we happen to be at physical eot (ST_EOM) (writing case), * the writing of filemark(s) will clear the ST_EOM state, which * we don't want, so we save this state and restore it later. */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "flag=%x, fmneeded=%x, lastop=%x, eof=%x\n", flag, un->un_fmneeded, un->un_lastop, un->un_eof); if (un->un_eof == ST_EOT_PENDING) { if (norew) { if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close: EIO can't space #3\n"); err = EIO; } else { un->un_blkno = 0; un->un_eof = ST_EOT; } } else { un->un_eof = ST_NO_EOF; } /* * Do we need to write a file mark? * * only write filemarks if there are fmks to be written and * - open for write (possibly read/write) * - the last operation was a write * or: * - opened for wronly * - no data was written */ } else if ((un->un_fileno >= 0) && (un->un_fmneeded > 0) && (((flag & FWRITE) && (un->un_lastop == ST_OP_WRITE)) || ((flag & FWRITE) && (un->un_lastop == ST_OP_WEOF)) || ((flag == FWRITE) && (un->un_lastop == ST_OP_NIL)))) { /* save ST_EOM state */ int was_at_eom = (un->un_eof == ST_EOM) ? 1 : 0; /* * Note that we will write a filemark if we had opened * the tape write only and no data was written, thus * creating a null file. * * If the user already wrote one, we only have to write 1 more. * If they wrote two, we don't have to write any. */ count = un->un_fmneeded; if (count > 0) { if (st_cmd(dev, SCMD_WRITE_FILE_MARK, count, SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close : EIO can't wfm\n"); err = EIO; } if ((un->un_dp->options & ST_REEL) && norew) { if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close : EIO space fmk(-1)\n"); err = EIO; } un->un_eof = ST_NO_EOF; /* fix up block number */ un->un_blkno = 0; } } /* * If we aren't going to be rewinding, and we were at * physical eot, restore the state that indicates we * are at physical eot. Once you have reached physical * eot, and you close the tape, the only thing you can * do on the next open is to rewind. Access to trailer * records is only allowed without closing the device. */ if (norew == 0 && was_at_eom) un->un_eof = ST_EOM; } /* * report soft errors if enabled and available, if we never accessed * the drive, don't get errors. This will prevent some DAT error * messages upon LOG SENSE. */ if (st_report_soft_errors_on_close && (un->un_dp->options & ST_SOFT_ERROR_REPORTING) && (last_state != ST_STATE_OFFLINE)) { (void) st_report_soft_errors(dev, flag); } /* * Do we need to rewind? Can we rewind? */ if (norew == 0 && un->un_fileno >= 0 && err == 0) { /* * We'd like to rewind with the * 'immediate' bit set, but this * causes problems on some drives * where subsequent opens get a * 'NOT READY' error condition * back while the tape is rewinding, * which is impossible to distinguish * from the condition of 'no tape loaded'. * * Also, for some targets, if you disconnect * with the 'immediate' bit set, you don't * actually return right away, i.e., the * target ignores your request for immediate * return. * * Instead, we'll fire off an async rewind * command. We'll mark the device as closed, * and any subsequent open will stall on * the first TEST_UNIT_READY until the rewind * completes. */ /* * Used to be if reserve was not supported we'd send an * asynchronious rewind. Comments above may be slightly invalid * as the immediate bit was never set. Doing an immedate rewind * makes sense, I think fixes to not ready status might handle * the problems described above. */ if (un->un_sd->sd_inq->inq_ansi < 2) { (void) st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD); } else { (void) st_cmd(dev, SCMD_REWIND, 0, ASYNC_CMD); } } /* * eject tape if necessary */ if (un->un_eject_tape_on_failure) { un->un_eject_tape_on_failure = 0; if (st_cmd(dev, SCMD_LOAD, 0, SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close : can't unload tape\n"); } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close : tape unloaded \n"); un->un_eof = ST_NO_EOF; un->un_mediastate = MTIO_EJECTED; } } /* * Release the tape unit, if default reserve/release * behaviour. */ if ((un->un_rsvd_status & (ST_RESERVE | ST_PRESERVE_RESERVE)) == ST_RESERVE) { (void) st_reserve_release(un, ST_RELEASE); } /* * clear up state */ un->un_laststate = un->un_state; un->un_state = ST_STATE_CLOSED; un->un_lastop = ST_OP_NIL; un->un_throttle = 1; /* assume one request at time, for now */ un->un_retry_ct = 0; un->un_tran_retry_ct = 0; un->un_errno = 0; un->un_swr_token = (opaque_t)NULL; un->un_rsvd_status &= ~(ST_INIT_RESERVE); /* Restore the options to the init time settings */ if (un->un_init_options & ST_READ_IGNORE_ILI) { un->un_dp->options |= ST_READ_IGNORE_ILI; } else { un->un_dp->options &= ~ST_READ_IGNORE_ILI; } if (un->un_init_options & ST_READ_IGNORE_EOFS) { un->un_dp->options |= ST_READ_IGNORE_EOFS; } else { un->un_dp->options &= ~ST_READ_IGNORE_EOFS; } if (un->un_init_options & ST_SHORT_FILEMARKS) { un->un_dp->options |= ST_SHORT_FILEMARKS; } else { un->un_dp->options &= ~ST_SHORT_FILEMARKS; } ASSERT(mutex_owned(ST_MUTEX)); /* * Signal anyone awaiting a close operation to complete. */ cv_signal(&un->un_clscv); /* * any kind of error on closing causes all state to be tossed */ if (err && un->un_status != KEY_ILLEGAL_REQUEST) { un->un_density_known = 0; /* * note that st_intr has already set un_fileno to -1 */ } #if defined(__i386) || defined(__amd64) /* * free any contiguous mem alloc'ed for big block I/O */ cp = un->un_contig_mem; while (cp) { if (cp->cm_addr) { ddi_dma_mem_free(&cp->cm_acc_hdl); } cp_temp = cp; cp = cp->cm_next; kmem_free(cp_temp, sizeof (struct contig_mem) + biosize()); } un->un_contig_mem_total_num = 0; un->un_contig_mem_available_num = 0; un->un_contig_mem = NULL; un->un_max_contig_mem_len = 0; #endif ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_close3: return val = %x, fileno=%x, blkno=%lx, un_eof=%x\n", err, un->un_fileno, un->un_blkno, un->un_eof); mutex_exit(ST_MUTEX); return (err); } /* * These routines perform raw i/o operations. */ /* ARGSUSED2 */ static int st_aread(dev_t dev, struct aio_req *aio, cred_t *cred_p) { return (st_arw(dev, aio, B_READ)); } /* ARGSUSED2 */ static int st_awrite(dev_t dev, struct aio_req *aio, cred_t *cred_p) { return (st_arw(dev, aio, B_WRITE)); } /* ARGSUSED */ static int st_read(dev_t dev, struct uio *uiop, cred_t *cred_p) { return (st_rw(dev, uiop, B_READ)); } /* ARGSUSED */ static int st_write(dev_t dev, struct uio *uiop, cred_t *cred_p) { return (st_rw(dev, uiop, B_WRITE)); } /* * Due to historical reasons, old limits are: For variable-length devices: * if greater than 64KB - 1 (ST_MAXRECSIZE_VARIABLE), block into 64 KB - 2 * ST_MAXRECSIZE_VARIABLE_LIMIT) requests; otherwise, * (let it through unmodified. For fixed-length record devices: * 63K (ST_MAXRECSIZE_FIXED) is max (default minphys). * * The new limits used are un_maxdma (retrieved using scsi_ifgetcap() * from the HBA) and un_maxbsize (retrieved by sending SCMD_READ_BLKLIM * command to the drive). * */ static void st_minphys(struct buf *bp) { struct scsi_tape *un; un = ddi_get_soft_state(st_state, MTUNIT(bp->b_edev)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_minphys(bp = 0x%p): b_bcount = 0x%lx\n", (void *)bp, bp->b_bcount); if (un->un_allow_large_xfer) { /* * check un_maxbsize for variable length devices only */ if (un->un_bsize == 0 && bp->b_bcount > un->un_maxbsize) { bp->b_bcount = un->un_maxbsize; } /* * can't go more that HBA maxdma limit in either fixed-length * or variable-length tape drives. */ if (bp->b_bcount > un->un_maxdma) { bp->b_bcount = un->un_maxdma; } } else { /* * use old fixed limits */ if (un->un_bsize == 0) { if (bp->b_bcount > ST_MAXRECSIZE_VARIABLE) { bp->b_bcount = ST_MAXRECSIZE_VARIABLE_LIMIT; } } else { if (bp->b_bcount > ST_MAXRECSIZE_FIXED) { bp->b_bcount = ST_MAXRECSIZE_FIXED; } } } /* * For regular raw I/O and Fixed Block length devices, make sure * the adjusted block count is a whole multiple of the device * block size. */ if (bp != un->un_sbufp && un->un_bsize) { bp->b_bcount -= (bp->b_bcount % un->un_bsize); } } static int st_rw(dev_t dev, struct uio *uio, int flag) { int rval = 0; long len; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_rw(dev = 0x%lx, flag = %s)\n", dev, (flag == B_READ ? rd_str: wr_str)); /* get local copy of transfer length */ len = uio->uio_iov->iov_len; mutex_enter(ST_MUTEX); /* * If in fixed block size mode and requested read or write * is not an even multiple of that block size. */ if ((un->un_bsize != 0) && (len % un->un_bsize != 0)) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "%s: not modulo %d block size\n", (flag == B_WRITE) ? wr_str : rd_str, un->un_bsize); rval = EINVAL; } /* If device has set granularity in the READ_BLKLIM we honor it. */ if ((un->un_data_mod != 0) && (len % un->un_data_mod != 0)) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "%s: not modulo %d device granularity\n", (flag == B_WRITE) ? wr_str : rd_str, un->un_data_mod); rval = EINVAL; } if (rval != 0) { un->un_errno = rval; mutex_exit(ST_MUTEX); return (rval); } un->un_silent_skip = 0; mutex_exit(ST_MUTEX); len = uio->uio_resid; rval = physio(st_strategy, (struct buf *)NULL, dev, flag, st_minphys, uio); /* * if we have hit logical EOT during this xfer and there is not a * full residue, then set un_eof back to ST_EOM to make sure that * the user will see at least one zero write * after this short write */ mutex_enter(ST_MUTEX); if (un->un_eof > ST_NO_EOF) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "un_eof=%d resid=%lx\n", un->un_eof, uio->uio_resid); } if (un->un_eof >= ST_EOM && (flag == B_WRITE)) { if ((uio->uio_resid != len) && (uio->uio_resid != 0)) { un->un_eof = ST_EOM; } else if (uio->uio_resid == len) { un->un_eof = ST_NO_EOF; } } if (un->un_silent_skip && uio->uio_resid != len) { un->un_eof = ST_EOF; un->un_blkno = un->un_save_blkno; un->un_fileno--; } un->un_errno = rval; mutex_exit(ST_MUTEX); return (rval); } static int st_arw(dev_t dev, struct aio_req *aio, int flag) { struct uio *uio = aio->aio_uio; int rval = 0; long len; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_rw(dev = 0x%lx, flag = %s)\n", dev, (flag == B_READ ? rd_str: wr_str)); /* get local copy of transfer length */ len = uio->uio_iov->iov_len; mutex_enter(ST_MUTEX); /* * If in fixed block size mode and requested read or write * is not an even multiple of that block size. */ if ((un->un_bsize != 0) && (len % un->un_bsize != 0)) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "%s: not modulo %d block size\n", (flag == B_WRITE) ? wr_str : rd_str, un->un_bsize); rval = EINVAL; } /* If device has set granularity in the READ_BLKLIM we honor it. */ if ((un->un_data_mod != 0) && (len % un->un_data_mod != 0)) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "%s: not modulo %d device granularity\n", (flag == B_WRITE) ? wr_str : rd_str, un->un_data_mod); rval = EINVAL; } if (rval != 0) { un->un_errno = rval; mutex_exit(ST_MUTEX); return (rval); } mutex_exit(ST_MUTEX); len = uio->uio_resid; rval = aphysio(st_strategy, anocancel, dev, flag, st_minphys, aio); /* * if we have hit logical EOT during this xfer and there is not a * full residue, then set un_eof back to ST_EOM to make sure that * the user will see at least one zero write * after this short write * * we keep this here just in case the application is not using * persistent errors */ mutex_enter(ST_MUTEX); if (un->un_eof > ST_NO_EOF) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "un_eof=%d resid=%lx\n", un->un_eof, uio->uio_resid); } if (un->un_eof >= ST_EOM && (flag == B_WRITE)) { if ((uio->uio_resid != len) && (uio->uio_resid != 0)) { un->un_eof = ST_EOM; } else if (uio->uio_resid == len && !IS_PE_FLAG_SET(un)) { un->un_eof = ST_NO_EOF; } } un->un_errno = rval; mutex_exit(ST_MUTEX); return (rval); } static int st_strategy(struct buf *bp) { struct scsi_tape *un; dev_t dev = bp->b_edev; /* * validate arguments */ if ((un = ddi_get_soft_state(st_state, MTUNIT(bp->b_edev))) == NULL) { bp->b_resid = bp->b_bcount; mutex_enter(ST_MUTEX); st_bioerror(bp, ENXIO); mutex_exit(ST_MUTEX); goto error; } mutex_enter(ST_MUTEX); while (un->un_pwr_mgmt == ST_PWR_SUSPENDED) { cv_wait(&un->un_suspend_cv, ST_MUTEX); } ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy(): bcount=0x%lx, fileno=%d, blkno=%lx, eof=%d\n", bp->b_bcount, un->un_fileno, un->un_blkno, un->un_eof); /* * If persistent errors have been flagged, just nix this one. We wait * for any outstanding I/O's below, so we will be in order. */ if (IS_PE_FLAG_SET(un)) goto exit; if (bp != un->un_sbufp) { char reading = bp->b_flags & B_READ; int wasopening = 0; /* * If we haven't done/checked reservation on the tape unit * do it now. */ if ((un->un_rsvd_status & (ST_RESERVE | ST_APPLICATION_RESERVATIONS)) == 0) { if ((un->un_dp->options & ST_NO_RESERVE_RELEASE) == 0) { if (st_reserve_release(un, ST_RESERVE)) { st_bioerror(bp, un->un_errno); goto exit; } } else if (un->un_state == ST_STATE_OPEN_PENDING_IO) { /* * Enter here to restore position for possible * resets when the device was closed and opened * in O_NDELAY mode subsequently */ un->un_state = ST_STATE_INITIALIZING; (void) st_cmd(dev, SCMD_TEST_UNIT_READY, 0, SYNC_CMD); un->un_state = ST_STATE_OPEN_PENDING_IO; } un->un_rsvd_status |= ST_INIT_RESERVE; } /* * If we are offline, we have to initialize everything first. * This is to handle either when opened with O_NDELAY, or * we just got a new tape in the drive, after an offline. * We don't observe O_NDELAY past the open, * as it will not make sense for tapes. */ if (un->un_state == ST_STATE_OFFLINE || un->un_restore_pos) { /* reset state to avoid recursion */ un->un_state = ST_STATE_INITIALIZING; if (st_tape_init(dev)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "stioctl : OFFLINE init failure "); un->un_state = ST_STATE_OFFLINE; un->un_fileno = -1; goto b_done_err; } un->un_state = ST_STATE_OPEN_PENDING_IO; } /* * Check for legal operations */ if (un->un_fileno < 0) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "strategy with un->un_fileno < 0\n"); goto b_done_err; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy(): regular io\n"); /* * Process this first. If we were reading, and we're pending * logical eot, that means we've bumped one file mark too far. */ /* * Recursion warning: st_cmd will route back through here. */ if (un->un_eof == ST_EOT_PENDING) { if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD)) { un->un_fileno = -1; un->un_density_known = 0; goto b_done_err; } un->un_blkno = 0; /* fix up block number.. */ un->un_eof = ST_EOT; } /* * If we are in the process of opening, we may have to * determine/set the correct density. We also may have * to do a test_append (if QIC) to see whether we are * in a position to append to the end of the tape. * * If we're already at logical eot, we transition * to ST_NO_EOF. If we're at physical eot, we punt * to the switch statement below to handle. */ if ((un->un_state == ST_STATE_OPEN_PENDING_IO) || (un->un_test_append && (un->un_dp->options & ST_QIC))) { if (un->un_state == ST_STATE_OPEN_PENDING_IO) { if (st_determine_density(dev, (int)reading)) { goto b_done_err; } } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "pending_io@fileno %d rw %d qic %d eof %d\n", un->un_fileno, (int)reading, (un->un_dp->options & ST_QIC) ? 1 : 0, un->un_eof); if (!reading && un->un_eof != ST_EOM) { if (un->un_eof == ST_EOT) { un->un_eof = ST_NO_EOF; } else if (un->un_fileno > 0 && (un->un_dp->options & ST_QIC)) { /* * st_test_append() will do it all */ st_test_append(bp); goto done; } } if (un->un_state == ST_STATE_OPEN_PENDING_IO) { wasopening = 1; } un->un_laststate = un->un_state; un->un_state = ST_STATE_OPEN; } /* * Process rest of END OF FILE and END OF TAPE conditions */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "un_eof=%x, wasopening=%x\n", un->un_eof, wasopening); switch (un->un_eof) { case ST_EOM: /* * This allows writes to proceed past physical * eot. We'll *really* be in trouble if the * user continues blindly writing data too * much past this point (unwind the tape). * Physical eot really means 'early warning * eot' in this context. * * Every other write from now on will succeed * (if sufficient tape left). * This write will return with resid == count * but the next one should be successful * * Note that we only transition to logical EOT * if the last state wasn't the OPENING state. * We explicitly prohibit running up to physical * eot, closing the device, and then re-opening * to proceed. Trailer records may only be gotten * at by keeping the tape open after hitting eot. * * Also note that ST_EOM cannot be set by reading- * this can only be set during writing. Reading * up to the end of the tape gets a blank check * or a double-filemark indication (ST_EOT_PENDING), * and we prohibit reading after that point. * */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "EOM\n"); if (wasopening == 0) { /* * this allows st_rw() to reset it back to * ST_EOM to make sure that the application * will see a zero write */ un->un_eof = ST_WRITE_AFTER_EOM; } un->un_status = SUN_KEY_EOT; goto b_done; case ST_WRITE_AFTER_EOM: case ST_EOT: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "EOT\n"); un->un_status = SUN_KEY_EOT; if (SVR4_BEHAVIOR && reading) { goto b_done_err; } if (reading) { goto b_done; } un->un_eof = ST_NO_EOF; break; case ST_EOF_PENDING: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "EOF PENDING\n"); un->un_status = SUN_KEY_EOF; if (SVR4_BEHAVIOR) { un->un_eof = ST_EOF; goto b_done; } /* FALLTHROUGH */ case ST_EOF: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "EOF\n"); un->un_status = SUN_KEY_EOF; if (SVR4_BEHAVIOR) { goto b_done_err; } if (BSD_BEHAVIOR) { un->un_eof = ST_NO_EOF; un->un_fileno += 1; un->un_blkno = 0; } if (reading) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "now file %d (read)\n", un->un_fileno); goto b_done; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "now file %d (write)\n", un->un_fileno); break; default: un->un_status = 0; break; } } bp->b_flags &= ~(B_DONE); st_bioerror(bp, 0); bp->av_forw = NULL; bp->b_resid = 0; SET_BP_PKT(bp, 0); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy: cmd=0x%p count=%ld resid=%ld flags=0x%x" " pkt=0x%p\n", (void *)bp->b_forw, bp->b_bcount, bp->b_resid, bp->b_flags, (void *)BP_PKT(bp)); #if defined(__i386) || defined(__amd64) /* * We will replace bp with a new bp that can do big blk xfer * if the requested xfer size is bigger than ST_BIGBLK_XFER * * Also, we need to make sure that we're handling real I/O * by checking group 0/1 SCSI I/O commands, if needed */ if (bp->b_bcount > ST_BIGBLK_XFER && (bp != un->un_sbufp || (uchar_t)(uintptr_t)bp->b_forw == SCMD_READ || (uchar_t)(uintptr_t)bp->b_forw == SCMD_READ_G1 || (uchar_t)(uintptr_t)bp->b_forw == SCMD_WRITE || (uchar_t)(uintptr_t)bp->b_forw == SCMD_WRITE_G1)) { mutex_exit(ST_MUTEX); bp = st_get_bigblk_bp(bp); mutex_enter(ST_MUTEX); } #endif /* put on wait queue */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy: un->un_quef = 0x%p, bp = 0x%p\n", (void *)un->un_quef, (void *)bp); if (un->un_quef) { un->un_quel->b_actf = bp; } else { un->un_quef = bp; } un->un_quel = bp; ST_DO_KSTATS(bp, kstat_waitq_enter); st_start(un); done: mutex_exit(ST_MUTEX); return (0); error: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy: error exit\n"); biodone(bp); return (0); b_done_err: st_bioerror(bp, EIO); ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy : EIO b_done_err\n"); b_done: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_strategy: b_done\n"); exit: /* * make sure no commands are outstanding or waiting before closing, * so we can guarantee order */ st_wait_for_io(un); un->un_err_resid = bp->b_resid = bp->b_bcount; /* override errno here, if persistent errors were flagged */ if (IS_PE_FLAG_SET(un)) bioerror(bp, un->un_errno); mutex_exit(ST_MUTEX); biodone(bp); ASSERT(mutex_owned(ST_MUTEX) == 0); return (0); } /* * this routine spaces forward over filemarks */ static int st_space_fmks(dev_t dev, int count) { int rval = 0; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_space_fmks(dev = 0x%lx, count = %d)\n", dev, count); ASSERT(mutex_owned(ST_MUTEX)); /* * the risk with doing only one space operation is that we * may accidentily jump in old data * the exabyte 8500 reading 8200 tapes cannot use KNOWS_EOD * because the 8200 does not append a marker; in order not to * sacrifice the fast file skip, we do a slow skip if the low * density device has been opened */ if ((un->un_dp->options & ST_KNOWS_EOD) && !((un->un_dp->type == ST_TYPE_EXB8500 && MT_DENSITY(dev) == 0))) { if (st_cmd(dev, SCMD_SPACE, Fmk(count), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "space_fmks : EIO can't do space cmd #1\n"); rval = EIO; } } else { while (count > 0) { if (st_cmd(dev, SCMD_SPACE, Fmk(1), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "space_fmks : EIO can't do space cmd #2\n"); rval = EIO; break; } count -= 1; /* * read a block to see if we have reached * end of medium (double filemark for reel or * medium error for others) */ if (count > 0) { if (st_cmd(dev, SCMD_SPACE, Blk(1), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "space_fmks : EIO can't do " "space cmd #3\n"); rval = EIO; break; } if ((un->un_eof >= ST_EOF_PENDING) && (un->un_dp->options & ST_REEL)) { un->un_status = SUN_KEY_EOT; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "space_fmks : EIO ST_REEL\n"); rval = EIO; break; } else if (IN_EOF(un)) { un->un_eof = ST_NO_EOF; un->un_fileno++; un->un_blkno = 0; count--; } else if (un->un_eof > ST_EOF) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "space_fmks, EIO > ST_EOF\n"); rval = EIO; break; } } } un->un_err_resid = count; un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; } ASSERT(mutex_owned(ST_MUTEX)); return (rval); } /* * this routine spaces to EOM * * it keeps track of the current filenumber and returns the filenumber after * the last successful space operation, we keep the number high because as * tapes are getting larger, the possibility of more and more files exist, * 0x100000 (1 Meg of files) probably will never have to be changed any time * soon */ #define MAX_SKIP 0x100000 /* somewhat arbitrary */ static int st_find_eom(dev_t dev) { int count, savefile; struct scsi_tape *un; int instance; instance = MTUNIT(dev); if ((un = ddi_get_soft_state(st_state, instance)) == NULL) return (-1); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_find_eom(dev = 0x%lx): fileno = %d\n", dev, un->un_fileno); ASSERT(mutex_owned(ST_MUTEX)); savefile = un->un_fileno; /* * see if the drive is smart enough to do the skips in * one operation; 1/2" use two filemarks * the exabyte 8500 reading 8200 tapes cannot use KNOWS_EOD * because the 8200 does not append a marker; in order not to * sacrifice the fast file skip, we do a slow skip if the low * density device has been opened */ if ((un->un_dp->options & ST_KNOWS_EOD) && !((un->un_dp->type == ST_TYPE_EXB8500 && MT_DENSITY(dev) == 0))) { count = MAX_SKIP; } else { count = 1; } while (st_cmd(dev, SCMD_SPACE, Fmk(count), SYNC_CMD) == 0) { savefile = un->un_fileno; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "count=%x, eof=%x, status=%x\n", count, un->un_eof, un->un_status); /* * If we're not EOM smart, space a record * to see whether we're now in the slot between * the two sequential filemarks that logical * EOM consists of (REEL) or hit nowhere land * (8mm). */ if (count == 1) { /* * no fast skipping, check a record */ if (st_cmd(dev, SCMD_SPACE, Blk((1)), SYNC_CMD)) break; else if ((un->un_eof >= ST_EOF_PENDING) && (un->un_dp->options & ST_REEL)) { un->un_status = KEY_BLANK_CHECK; un->un_fileno++; un->un_blkno = 0; break; } else if (IN_EOF(un)) { un->un_eof = ST_NO_EOF; un->un_fileno++; un->un_blkno = 0; } else if (un->un_eof > ST_EOF) { break; } } else { if (un->un_eof > ST_EOF) { break; } } } if (un->un_dp->options & ST_KNOWS_EOD) { savefile = un->un_fileno; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_find_eom: %x\n", savefile); ASSERT(mutex_owned(ST_MUTEX)); return (savefile); } /* * this routine is frequently used in ioctls below; * it determines whether we know the density and if not will * determine it * if we have written the tape before, one or more filemarks are written * * depending on the stepflag, the head is repositioned to where it was before * the filemarks were written in order not to confuse step counts */ #define STEPBACK 0 #define NO_STEPBACK 1 static int st_check_density_or_wfm(dev_t dev, int wfm, int mode, int stepflag) { GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_density_or_wfm(dev= 0x%lx, wfm= %d, mode= %d, stpflg= %d)\n", dev, wfm, mode, stepflag); ASSERT(mutex_owned(ST_MUTEX)); /* * If we don't yet know the density of the tape we have inserted, * we have to either unconditionally set it (if we're 'writing'), * or we have to determine it. As side effects, check for any * write-protect errors, and for the need to put out any file-marks * before positioning a tape. * * If we are going to be spacing forward, and we haven't determined * the tape density yet, we have to do so now... */ if (un->un_state == ST_STATE_OPEN_PENDING_IO) { if (st_determine_density(dev, mode)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "check_density_or_wfm : EIO can't determine " "density\n"); un->un_errno = EIO; return (EIO); } /* * Presumably we are at BOT. If we attempt to write, it will * either work okay, or bomb. We don't do a st_test_append * unless we're past BOT. */ un->un_laststate = un->un_state; un->un_state = ST_STATE_OPEN; } else if (un->un_fileno >= 0 && un->un_fmneeded > 0 && ((un->un_lastop == ST_OP_WEOF && wfm) || (un->un_lastop == ST_OP_WRITE && wfm))) { daddr_t blkno = un->un_blkno; int fileno = un->un_fileno; /* * We need to write one or two filemarks. * In the case of the HP, we need to * position the head between the two * marks. */ if ((un->un_fmneeded > 0) || (un->un_lastop == ST_OP_WEOF)) { wfm = un->un_fmneeded; un->un_fmneeded = 0; } if (st_write_fm(dev, wfm)) { un->un_fileno = -1; un->un_density_known = 0; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "check_density_or_wfm : EIO can't write fm\n"); un->un_errno = EIO; return (EIO); } if (stepflag == STEPBACK) { if (st_cmd(dev, SCMD_SPACE, Fmk((-wfm)), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "check_density_or_wfm : EIO can't space " "(-wfm)\n"); un->un_errno = EIO; return (EIO); } un->un_blkno = blkno; un->un_fileno = fileno; } } /* * Whatever we do at this point clears the state of the eof flag. */ un->un_eof = ST_NO_EOF; /* * If writing, let's check that we're positioned correctly * at the end of tape before issuing the next write. */ if (un->un_read_only == RDWR) { un->un_test_append = 1; } ASSERT(mutex_owned(ST_MUTEX)); return (0); } /* * Wait for all outstaning I/O's to complete * * we wait on both ncmds and the wait queue for times when we are flushing * after persistent errors are flagged, which is when ncmds can be 0, and the * queue can still have I/O's. This way we preserve order of biodone's. */ static void st_wait_for_io(struct scsi_tape *un) { ASSERT(mutex_owned(ST_MUTEX)); while (un->un_ncmds || un->un_quef) { cv_wait(&un->un_queue_cv, ST_MUTEX); } } /* * This routine implements the ioctl calls. It is called * from the device switch at normal priority. */ /*ARGSUSED*/ static int st_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cred_p, int *rval_p) { int tmp, rval = 0; GET_SOFT_STATE(dev); mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl(): fileno=%x, blkno=%lx, un_eof=%x, state = %d, " "pe_flag = %d\n", un->un_fileno, un->un_blkno, un->un_eof, un->un_state, IS_PE_FLAG_SET(un)); /* * We don't want to block on these, so let them through * and we don't care about setting driver states here. */ if ((cmd == MTIOCGETDRIVETYPE) || (cmd == MTIOCGUARANTEEDORDER) || (cmd == MTIOCPERSISTENTSTATUS)) { goto check_commands; } /* * wait for all outstanding commands to complete, or be dequeued. * And because ioctl's are synchronous commands, any return value * after this, will be in order */ st_wait_for_io(un); /* * allow only a through clear errors and persistent status, and * status */ if (IS_PE_FLAG_SET(un)) { if ((cmd == MTIOCLRERR) || (cmd == MTIOCPERSISTENT) || (cmd == MTIOCGET)) { goto check_commands; } else { rval = un->un_errno; goto exit; } } un->un_throttle = 1; /* > 1 will never happen here */ un->un_errno = 0; /* start clean from here */ /* * first and foremost, handle any ST_EOT_PENDING cases. * That is, if a logical eot is pending notice, notice it. */ if (un->un_eof == ST_EOT_PENDING) { int resid = un->un_err_resid; uchar_t status = un->un_status; uchar_t lastop = un->un_lastop; if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "stioctl : EIO can't space fmk(-1)\n"); rval = EIO; goto exit; } un->un_lastop = lastop; /* restore last operation */ if (status == SUN_KEY_EOF) { un->un_status = SUN_KEY_EOT; } else { un->un_status = status; } un->un_err_resid = resid; un->un_err_blkno = un->un_blkno = 0; /* fix up block number */ un->un_eof = ST_EOT; /* now we're at logical eot */ } /* * now, handle the rest of the situations */ check_commands: switch (cmd) { case MTIOCGET: { #ifdef _MULTI_DATAMODEL /* * For use when a 32 bit app makes a call into a * 64 bit ioctl */ struct mtget32 mtg_local32; struct mtget32 *mtget_32 = &mtg_local32; #endif /* _MULTI_DATAMODEL */ /* Get tape status */ struct mtget mtg_local; struct mtget *mtget = &mtg_local; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCGET\n"); bzero(mtget, sizeof (struct mtget)); mtget->mt_erreg = un->un_status; mtget->mt_resid = un->un_err_resid; mtget->mt_dsreg = un->un_retry_ct; mtget->mt_fileno = un->un_err_fileno; mtget->mt_blkno = un->un_err_blkno; mtget->mt_type = un->un_dp->type; mtget->mt_flags = MTF_SCSI | MTF_ASF; if (un->un_dp->options & ST_REEL) { mtget->mt_flags |= MTF_REEL; mtget->mt_bf = 20; } else { /* 1/4" cartridges */ switch (mtget->mt_type) { /* Emulex cartridge tape */ case MT_ISMT02: mtget->mt_bf = 40; break; default: mtget->mt_bf = 126; break; } } /* * If large transfers are allowed and drive options * has no record size limit set. Calculate blocking * factor from the lesser of maxbsize and maxdma. */ if ((un->un_allow_large_xfer) && (un->un_dp->options & ST_NO_RECSIZE_LIMIT)) { mtget->mt_bf = min(un->un_maxbsize, un->un_maxdma) / SECSIZE; } if (un->un_read_only == WORM || un->un_read_only == RDWORM) { mtget->mt_flags |= MTF_WORM_MEDIA; } rval = st_check_clean_bit(dev); if (rval == -1) { rval = EIO; goto exit; } else { mtget->mt_flags |= (ushort_t)rval; rval = 0; } un->un_status = 0; /* Reset status */ un->un_err_resid = 0; tmp = sizeof (struct mtget); #ifdef _MULTI_DATAMODEL switch (ddi_model_convert_from(flag & FMODELS)) { case DDI_MODEL_ILP32: /* * Convert 64 bit back to 32 bit before doing * copyout. This is what the ILP32 app expects. */ mtget_32->mt_erreg = mtget->mt_erreg; mtget_32->mt_resid = mtget->mt_resid; mtget_32->mt_dsreg = mtget->mt_dsreg; mtget_32->mt_fileno = (daddr32_t)mtget->mt_fileno; mtget_32->mt_blkno = (daddr32_t)mtget->mt_blkno; mtget_32->mt_type = mtget->mt_type; mtget_32->mt_flags = mtget->mt_flags; mtget_32->mt_bf = mtget->mt_bf; if (ddi_copyout(mtget_32, (void *)arg, sizeof (struct mtget32), flag)) { rval = EFAULT; } break; case DDI_MODEL_NONE: if (ddi_copyout(mtget, (void *)arg, tmp, flag)) { rval = EFAULT; } break; } #else /* ! _MULTI_DATAMODE */ if (ddi_copyout(mtget, (void *)arg, tmp, flag)) { rval = EFAULT; } #endif /* _MULTI_DATAMODE */ break; } case MTIOCSTATE: { /* * return when media presence matches state */ enum mtio_state state; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCSTATE\n"); if (ddi_copyin((void *)arg, &state, sizeof (int), flag)) rval = EFAULT; mutex_exit(ST_MUTEX); rval = st_check_media(dev, state); mutex_enter(ST_MUTEX); if (rval != 0) { break; } if (ddi_copyout(&un->un_mediastate, (void *)arg, sizeof (int), flag)) rval = EFAULT; break; } case MTIOCGETDRIVETYPE: { #ifdef _MULTI_DATAMODEL /* * For use when a 32 bit app makes a call into a * 64 bit ioctl */ struct mtdrivetype_request32 mtdtrq32; #endif /* _MULTI_DATAMODEL */ /* * return mtdrivetype */ struct mtdrivetype_request mtdtrq; struct mtdrivetype mtdrtyp; struct mtdrivetype *mtdt = &mtdrtyp; struct st_drivetype *stdt = un->un_dp; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCGETDRIVETYPE\n"); #ifdef _MULTI_DATAMODEL switch (ddi_model_convert_from(flag & FMODELS)) { case DDI_MODEL_ILP32: { if (ddi_copyin((void *)arg, &mtdtrq32, sizeof (struct mtdrivetype_request32), flag)) { rval = EFAULT; break; } mtdtrq.size = mtdtrq32.size; mtdtrq.mtdtp = (struct mtdrivetype *)(uintptr_t)mtdtrq32.mtdtp; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: size 0x%x\n", mtdtrq.size); break; } case DDI_MODEL_NONE: if (ddi_copyin((void *)arg, &mtdtrq, sizeof (struct mtdrivetype_request), flag)) { rval = EFAULT; break; } break; } #else /* ! _MULTI_DATAMODEL */ if (ddi_copyin((void *)arg, &mtdtrq, sizeof (struct mtdrivetype_request), flag)) { rval = EFAULT; break; } #endif /* _MULTI_DATAMODEL */ /* * if requested size is < 0 then return * error. */ if (mtdtrq.size < 0) { rval = EINVAL; break; } bzero(mtdt, sizeof (struct mtdrivetype)); (void) strncpy(mtdt->name, stdt->name, ST_NAMESIZE); (void) strncpy(mtdt->vid, stdt->vid, VIDPIDLEN - 1); mtdt->type = stdt->type; mtdt->bsize = stdt->bsize; mtdt->options = stdt->options; mtdt->max_rretries = stdt->max_rretries; mtdt->max_wretries = stdt->max_wretries; for (tmp = 0; tmp < NDENSITIES; tmp++) mtdt->densities[tmp] = stdt->densities[tmp]; mtdt->default_density = stdt->default_density; /* * Speed hasn't been used since the hayday of reel tape. * For all drives not setting the option ST_KNOWS_MEDIA * the speed member renamed to mediatype are zeros. * Those drives that have ST_KNOWS_MEDIA set use the * new mediatype member which is used to figure the * type of media loaded. * * So as to not break applications speed in the * mtdrivetype structure is not renamed. */ for (tmp = 0; tmp < NDENSITIES; tmp++) { mtdt->speeds[tmp] = stdt->mediatype[tmp]; } mtdt->non_motion_timeout = stdt->non_motion_timeout; mtdt->io_timeout = stdt->io_timeout; mtdt->rewind_timeout = stdt->rewind_timeout; mtdt->space_timeout = stdt->space_timeout; mtdt->load_timeout = stdt->load_timeout; mtdt->unload_timeout = stdt->unload_timeout; mtdt->erase_timeout = stdt->erase_timeout; /* * Limit the maximum length of the result to * sizeof (struct mtdrivetype). */ tmp = sizeof (struct mtdrivetype); if (mtdtrq.size < tmp) tmp = mtdtrq.size; if (ddi_copyout(mtdt, mtdtrq.mtdtp, tmp, flag)) { rval = EFAULT; } break; } case MTIOCPERSISTENT: { int persistence = 0; if (ddi_copyin((void *)arg, &persistence, sizeof (int), flag)) { rval = EFAULT; break; } /* non zero sets it, only 0 turns it off */ un->un_persistence = (uchar_t)persistence ? 1 : 0; if (un->un_persistence) TURN_PE_ON(un); else TURN_PE_OFF(un); ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCPERSISTENT : persistence = %d\n", un->un_persistence); break; } case MTIOCPERSISTENTSTATUS: { int persistence = (int)un->un_persistence; if (ddi_copyout(&persistence, (void *)arg, sizeof (int), flag)) { rval = EFAULT; } ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCPERSISTENTSTATUS:persistece = %d\n", un->un_persistence); break; } case MTIOCLRERR: { /* clear persistent errors */ ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCLRERR\n"); CLEAR_PE(un); break; } case MTIOCGUARANTEEDORDER: { /* * this is just a holder to make a valid ioctl and * it won't be in any earlier release */ ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCGUARANTEEDORDER\n"); break; } case MTIOCRESERVE: { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCRESERVE\n"); /* * Check if Reserve/Release is supported. */ if (un->un_dp->options & ST_NO_RESERVE_RELEASE) { rval = ENOTTY; break; } rval = st_reserve_release(un, ST_RESERVE); if (rval == 0) { un->un_rsvd_status |= ST_PRESERVE_RESERVE; } break; } case MTIOCRELEASE: { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCRELEASE\n"); /* * Check if Reserve/Release is supported. */ if (un->un_dp->options & ST_NO_RESERVE_RELEASE) { rval = ENOTTY; break; } /* * Used to just clear ST_PRESERVE_RESERVE which * made the reservation release at next close. * As the user may have opened and then done a * persistant reservation we now need to drop * the reservation without closing if the user * attempts to do this. */ rval = st_reserve_release(un, ST_RELEASE); un->un_rsvd_status &= ~ST_PRESERVE_RESERVE; break; } case MTIOCFORCERESERVE: { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCFORCERESERVE\n"); /* * Check if Reserve/Release is supported. */ if (un->un_dp->options & ST_NO_RESERVE_RELEASE) { rval = ENOTTY; break; } /* * allow only super user to run this. */ if (drv_priv(cred_p) != 0) { rval = EPERM; break; } /* * Throw away reserve, * not using test-unit-ready * since reserve can succeed without tape being * present in the drive. */ (void) st_reserve_release(un, ST_RESERVE); rval = st_take_ownership(dev); break; } case USCSICMD: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: USCSICMD\n"); { cred_t *cr; cr = ddi_get_cred(); if ((drv_priv(cred_p) != 0) && (drv_priv(cr) != 0)) { rval = EPERM; } else { rval = st_ioctl_cmd(dev, (struct uscsi_cmd *)arg, flag); } } break; case MTIOCTOP: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: MTIOCTOP\n"); rval = st_mtioctop(un, arg, flag); break; case MTIOCREADIGNOREILI: { int set_ili; if (ddi_copyin((void *)arg, &set_ili, sizeof (set_ili), flag)) { rval = EFAULT; break; } if (un->un_bsize) { rval = ENOTTY; break; } switch (set_ili) { case 0: un->un_dp->options &= ~ST_READ_IGNORE_ILI; break; case 1: un->un_dp->options |= ST_READ_IGNORE_ILI; break; default: rval = EINVAL; break; } break; } case MTIOCREADIGNOREEOFS: { int ignore_eof; if (ddi_copyin((void *)arg, &ignore_eof, sizeof (ignore_eof), flag)) { rval = EFAULT; break; } if (!(un->un_dp->options & ST_REEL)) { rval = ENOTTY; break; } switch (ignore_eof) { case 0: un->un_dp->options &= ~ST_READ_IGNORE_EOFS; break; case 1: un->un_dp->options |= ST_READ_IGNORE_EOFS; break; default: rval = EINVAL; break; } break; } case MTIOCSHORTFMK: { int short_fmk; if (ddi_copyin((void *)arg, &short_fmk, sizeof (short_fmk), flag)) { rval = EFAULT; break; } switch (un->un_dp->type) { case ST_TYPE_EXB8500: case ST_TYPE_EXABYTE: if (!short_fmk) { un->un_dp->options &= ~ST_SHORT_FILEMARKS; } else if (short_fmk == 1) { un->un_dp->options |= ST_SHORT_FILEMARKS; } else { rval = EINVAL; } break; default: rval = ENOTTY; break; } break; } default: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: unknown ioctl\n"); rval = ENOTTY; } exit: if (!IS_PE_FLAG_SET(un)) un->un_errno = rval; mutex_exit(ST_MUTEX); return (rval); } /* * do some MTIOCTOP tape operations */ static int st_mtioctop(struct scsi_tape *un, intptr_t arg, int flag) { struct mtop *mtop, local; int savefile, tmp, rval = 0; dev_t dev = un->un_dev; #ifdef _MULTI_DATAMODEL /* * For use when a 32 bit app makes a call into a * 64 bit ioctl */ struct mtop32 mtop_32_for_64; #endif /* _MULTI_DATAMODEL */ ASSERT(mutex_owned(ST_MUTEX)); mtop = &local; #ifdef _MULTI_DATAMODEL switch (ddi_model_convert_from(flag & FMODELS)) { case DDI_MODEL_ILP32: { if (ddi_copyin((void *)arg, &mtop_32_for_64, sizeof (struct mtop32), flag)) { return (EFAULT); } mtop->mt_op = mtop_32_for_64.mt_op; mtop->mt_count = (daddr_t)mtop_32_for_64.mt_count; break; } case DDI_MODEL_NONE: if (ddi_copyin((void *)arg, mtop, sizeof (struct mtop), flag)) { return (EFAULT); } break; } #else /* ! _MULTI_DATAMODEL */ if (ddi_copyin((void *)arg, mtop, sizeof (struct mtop), flag)) { return (EFAULT); } #endif /* _MULTI_DATAMODEL */ ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop(): mt_op=%x\n", mtop->mt_op); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "fileno=%x, blkno=%lx, un_eof=%x\n", un->un_fileno, un->un_blkno, un->un_eof); rval = 0; un->un_status = 0; /* * if we are going to mess with a tape, we have to make sure we have * one and are not offline (i.e. no tape is initialized). We let * commands pass here that don't actually touch the tape, except for * loading and initialization (rewinding). */ if (un->un_state == ST_STATE_OFFLINE) { switch (mtop->mt_op) { case MTLOAD: case MTNOP: /* * We don't want strategy calling st_tape_init here, * so, change state */ un->un_state = ST_STATE_INITIALIZING; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : OFFLINE state = %d\n", un->un_state); break; default: /* * reinitialize by normal means */ rval = st_tape_init(dev); if (rval) { un->un_state = ST_STATE_INITIALIZING; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : OFFLINE init failure "); un->un_state = ST_STATE_OFFLINE; un->un_fileno = -1; if (rval != EACCES) { rval = EIO; } return (rval); } un->un_state = ST_STATE_OPEN_PENDING_IO; break; } } /* * If the file position is invalid, allow only those * commands that properly position the tape and fail * the rest with EIO */ if (un->un_fileno < 0) { switch (mtop->mt_op) { case MTWEOF: case MTRETEN: case MTERASE: case MTEOM: case MTFSF: case MTFSR: case MTBSF: case MTNBSF: case MTBSR: case MTSRSZ: case MTGRSZ: return (EIO); /* NOTREACHED */ case MTREW: case MTLOAD: case MTOFFL: case MTNOP: break; default: return (ENOTTY); /* NOTREACHED */ } } switch (mtop->mt_op) { case MTERASE: /* * MTERASE rewinds the tape, erase it completely, and returns * to the beginning of the tape */ if (un->un_mspl->wp || un->un_read_only & WORM) { un->un_status = KEY_WRITE_PROTECT; un->un_err_resid = mtop->mt_count; un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; return (EACCES); } if (un->un_dp->options & ST_REEL) { un->un_fmneeded = 2; } else { un->un_fmneeded = 1; } if (st_check_density_or_wfm(dev, 1, B_WRITE, NO_STEPBACK) || st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD) || st_cmd(dev, SCMD_ERASE, 0, SYNC_CMD)) { un->un_fileno = -1; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO space or erase or check den)\n"); rval = EIO; } else { /* QIC and helical scan rewind after erase */ if (un->un_dp->options & ST_REEL) { (void) st_cmd(dev, SCMD_REWIND, 0, ASYNC_CMD); } } break; case MTWEOF: /* * write an end-of-file record */ if (un->un_mspl->wp || un->un_read_only & RDONLY) { un->un_status = KEY_WRITE_PROTECT; un->un_err_resid = mtop->mt_count; un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; return (EACCES); } /* * zero count means just flush buffers * negative count is not permitted */ if (mtop->mt_count < 0) return (EINVAL); /* Not on worm */ if (un->un_read_only == RDWR) { un->un_test_append = 1; } if (un->un_state == ST_STATE_OPEN_PENDING_IO) { if (st_determine_density(dev, B_WRITE)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTWEOF can't determine" "density"); return (EIO); } } rval = st_write_fm(dev, (int)mtop->mt_count); if ((rval != 0) && (rval != EACCES)) { /* * Failure due to something other than illegal * request results in loss of state (st_intr). */ ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTWEOF can't write file mark"); rval = EIO; } break; case MTRETEN: /* * retension the tape */ if (st_check_density_or_wfm(dev, 1, 0, NO_STEPBACK) || st_cmd(dev, SCMD_LOAD, 3, SYNC_CMD)) { un->un_fileno = -1; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTRETEN "); rval = EIO; } break; case MTREW: /* * rewind the tape */ if (st_check_density_or_wfm(dev, 1, 0, NO_STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO:MTREW check density/wfm failed"); return (EIO); } if (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTREW "); rval = EIO; } break; case MTOFFL: /* * rewinds, and, if appropriate, takes the device offline by * unloading the tape */ if (st_check_density_or_wfm(dev, 1, 0, NO_STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop :EIO:MTOFFL check density/wfm failed"); return (EIO); } (void) st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD); if (st_cmd(dev, SCMD_LOAD, 0, SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTOFFL"); return (EIO); } un->un_eof = ST_NO_EOF; un->un_laststate = un->un_state; un->un_state = ST_STATE_OFFLINE; un->un_mediastate = MTIO_EJECTED; break; case MTLOAD: /* * This is to load a tape into the drive * Note that if the tape is not loaded, the device will have * to be opened via O_NDELAY or O_NONBLOCK. */ /* * Let's try and clean things up, if we are not * initializing, and then send in the load command, no * matter what. * * load after a media change by the user. */ if (un->un_state > ST_STATE_INITIALIZING) (void) st_check_density_or_wfm(dev, 1, 0, NO_STEPBACK); rval = st_cmd(dev, SCMD_LOAD, 1, SYNC_CMD); if (rval) { if (rval != EACCES) { rval = EIO; } ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : %s : MTLOAD\n", rval == EACCES ? "EACCES" : "EIO"); /* * If load tape fails, who knows what happened... */ un->un_fileno = -1; break; } /* * reset all counters appropriately using rewind, as if LOAD * succeeds, we are at BOT */ un->un_state = ST_STATE_INITIALIZING; rval = st_tape_init(dev); if ((rval == EACCES) && (un->un_read_only & WORM)) { rval = 0; break; } if (rval != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTLOAD calls st_tape_init\n"); rval = EIO; un->un_state = ST_STATE_OFFLINE; } break; case MTNOP: un->un_status = 0; /* Reset status */ un->un_err_resid = 0; break; case MTEOM: /* * positions the tape at a location just after the last file * written on the tape. For cartridge and 8 mm, this after * the last file mark; for reel, this is inbetween the two * last 2 file marks */ if ((un->un_eof >= ST_EOT) || (un->un_lastop == ST_OP_WRITE) || (un->un_lastop == ST_OP_WEOF)) { /* * If the command wants to move to logical end * of media, and we're already there, we're done. * If we were at logical eot, we reset the state * to be *not* at logical eot. * * If we're at physical or logical eot, we prohibit * forward space operations (unconditionally). * * Also if the last operation was a write of any * kind the tape is at EOD. */ return (0); } /* * physical tape position may not be what we've been * telling the user; adjust the request accordingly */ if (IN_EOF(un)) { un->un_fileno++; un->un_blkno = 0; } if (st_check_density_or_wfm(dev, 1, B_READ, NO_STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO:MTEOM check density/wfm failed"); return (EIO); } /* * st_find_eom() returns the last fileno we knew about; */ savefile = st_find_eom(dev); if ((un->un_status != KEY_BLANK_CHECK) && (un->un_status != SUN_KEY_EOT)) { un->un_fileno = -1; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTEOM status check failed"); rval = EIO; } else { /* * For 1/2" reel tapes assume logical EOT marked * by two file marks or we don't care that we may * be extending the last file on the tape. */ if (un->un_dp->options & ST_REEL) { if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD)) { un->un_fileno = -1; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTEOM space " "cmd failed"); rval = EIO; break; } /* * Fix up the block number. */ un->un_blkno = 0; un->un_err_blkno = 0; } un->un_err_resid = 0; un->un_fileno = savefile; un->un_eof = ST_EOT; } un->un_status = 0; break; case MTFSF: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "fsf: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); /* * forward space over filemark * * For ASF we allow a count of 0 on fsf which means * we just want to go to beginning of current file. * Equivalent to "nbsf(0)" or "bsf(1) + fsf". * Allow stepping over double fmk with reel */ if ((un->un_eof >= ST_EOT) && (mtop->mt_count > 0) && ((un->un_dp->options & ST_REEL) == 0)) { /* we're at EOM */ un->un_err_resid = mtop->mt_count; un->un_status = KEY_BLANK_CHECK; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTFSF at EOM"); return (EIO); } /* * physical tape position may not be what we've been * telling the user; adjust the request accordingly */ if (IN_EOF(un)) { un->un_fileno++; un->un_blkno = 0; /* * For positive direction case, we're now covered. * For zero or negative direction, we're covered * (almost) */ mtop->mt_count--; } if (st_check_density_or_wfm(dev, 1, B_READ, STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTFSF density/wfm failed"); return (EIO); } /* * Forward space file marks. * We leave ourselves at block zero * of the target file number. */ if (mtop->mt_count < 0) { mtop->mt_count = -mtop->mt_count; mtop->mt_op = MTNBSF; goto bspace; } fspace: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "fspace: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); if ((tmp = mtop->mt_count) == 0) { if (un->un_blkno == 0) { un->un_err_resid = 0; un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; break; } else if (un->un_fileno == 0) { rval = st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD); } else if (un->un_dp->options & ST_BSF) { rval = (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD) || st_cmd(dev, SCMD_SPACE, Fmk(1), SYNC_CMD)); } else { tmp = un->un_fileno; rval = (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD) || st_cmd(dev, SCMD_SPACE, (int)Fmk(tmp), SYNC_CMD)); } if (rval != 0) { un->un_fileno = -1; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : fspace fileno = -1"); rval = EIO; } } else { rval = st_space_fmks(dev, tmp); } if (mtop->mt_op == MTBSF && rval != EIO) { /* * we came here with a count < 0; we now need * to skip back to end up before the filemark */ mtop->mt_count = 1; goto bspace; } break; case MTFSR: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "fsr: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); /* * forward space to inter-record gap * */ if ((un->un_eof >= ST_EOT) && (mtop->mt_count > 0)) { /* we're at EOM */ un->un_err_resid = mtop->mt_count; un->un_status = KEY_BLANK_CHECK; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTFSR un_eof > ST_EOT"); return (EIO); } if (mtop->mt_count == 0) { un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; un->un_err_resid = 0; if (IN_EOF(un) && SVR4_BEHAVIOR) { un->un_status = SUN_KEY_EOF; } return (0); } /* * physical tape position may not be what we've been * telling the user; adjust the position accordingly */ if (IN_EOF(un)) { daddr_t blkno = un->un_blkno; int fileno = un->un_fileno; uchar_t lastop = un->un_lastop; if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD) == -1) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO :MTFSR count && IN_EOF"); return (EIO); } un->un_blkno = blkno; un->un_fileno = fileno; un->un_lastop = lastop; } if (st_check_density_or_wfm(dev, 1, B_READ, STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : MTFSR st_check_den"); return (EIO); } space_records: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "space_records: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); tmp = un->un_blkno + mtop->mt_count; if (tmp == un->un_blkno) { un->un_err_resid = 0; un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; break; } else if (un->un_blkno < tmp || (un->un_dp->options & ST_BSR)) { /* * If we're spacing forward, or the device can * backspace records, we can just use the SPACE * command. */ tmp = tmp - un->un_blkno; if (st_cmd(dev, SCMD_SPACE, Blk(tmp), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop :EIO:space_records can't spc"); rval = EIO; } else if (un->un_eof >= ST_EOF_PENDING) { /* * check if we hit BOT/EOT */ if (tmp < 0 && un->un_eof == ST_EOM) { un->un_status = SUN_KEY_BOT; un->un_eof = ST_NO_EOF; } else if (tmp < 0 && un->un_eof == ST_EOF_PENDING) { int residue = un->un_err_resid; /* * we skipped over a filemark * and need to go forward again */ if (st_cmd(dev, SCMD_SPACE, Fmk(1), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : " "space_records can't " "space #2"); rval = EIO; } un->un_err_resid = residue; } if (rval == 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO : space_rec rval" " == 0"); rval = EIO; } } } else { /* * else we rewind, space forward across filemarks to * the desired file, and then space records to the * desired block. */ int t = un->un_fileno; /* save current file */ if (tmp < 0) { /* * Wups - we're backing up over a filemark */ if (un->un_blkno != 0 && (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD) || st_cmd(dev, SCMD_SPACE, Fmk(t), SYNC_CMD))) un->un_fileno = -1; un->un_err_resid = -tmp; if (un->un_fileno == 0 && un->un_blkno == 0) { un->un_status = SUN_KEY_BOT; un->un_eof = ST_NO_EOF; } else if (un->un_fileno > 0) { un->un_status = SUN_KEY_EOF; un->un_eof = ST_NO_EOF; } un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop :EIO:space_records : tmp < 0"); rval = EIO; } else if (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD) || st_cmd(dev, SCMD_SPACE, Fmk(t), SYNC_CMD) || st_cmd(dev, SCMD_SPACE, Blk(tmp), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_mtioctop : EIO :space_records : rewind " "and space failed"); un->un_fileno = -1; rval = EIO; } } break; case MTBSF: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "bsf: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); /* * backward space of file filemark (1/2" and 8mm) * tape position will end on the beginning of tape side * of the desired file mark */ if ((un->un_dp->options & ST_BSF) == 0) { return (ENOTTY); } /* * If a negative count (which implies a forward space op) * is specified, and we're at logical or physical eot, * bounce the request. */ if (un->un_eof >= ST_EOT && mtop->mt_count < 0) { un->un_err_resid = mtop->mt_count; un->un_status = SUN_KEY_EOT; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : MTBSF : un_eof > ST_EOF"); return (EIO); } /* * physical tape position may not be what we've been * telling the user; adjust the request accordingly */ if (IN_EOF(un)) { un->un_fileno++; un->un_blkno = 0; mtop->mt_count++; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "bsf in eof: count=%ld, op=%x\n", mtop->mt_count, mtop->mt_op); } if (st_check_density_or_wfm(dev, 1, 0, STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : MTBSF : check den wfm"); return (EIO); } if (mtop->mt_count <= 0) { /* * for a negative count, we need to step forward * first and then step back again */ mtop->mt_count = -mtop->mt_count+1; goto fspace; } bspace: { int skip_cnt, end_at_eof; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "bspace: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); /* * Backspace files (MTNBSF): * * For tapes that can backspace, backspace * count+1 filemarks and then run forward over * a filemark * * For tapes that can't backspace, * calculate desired filenumber * (un->un_fileno - count), rewind, * and then space forward this amount * * Backspace filemarks (MTBSF) * * For tapes that can backspace, backspace count * filemarks * * For tapes that can't backspace, calculate * desired filenumber (un->un_fileno - count), * add 1, rewind, space forward this amount, * and mark state as ST_EOF_PENDING appropriately. */ if (mtop->mt_op == MTBSF) { end_at_eof = 1; } else { end_at_eof = 0; } ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "bspace: mt_op=%x, count=%lx, fileno=%x, blkno=%lx\n", mtop->mt_op, mtop->mt_count, un->un_fileno, un->un_blkno); /* * Handle the simple case of BOT * playing a role in these cmds. * We do this by calculating the * ending file number. If the ending * file is < BOT, rewind and set an * error and mark resid appropriately. * If we're backspacing a file (not a * filemark) and the target file is * the first file on the tape, just * rewind. */ tmp = un->un_fileno - mtop->mt_count; if ((end_at_eof && tmp < 0) || (end_at_eof == 0 && tmp <= 0)) { if (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : bspace : end_at_eof && " "tmp < 0"); rval = EIO; } if (tmp < 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : bspace : tmp < 0"); rval = EIO; un->un_err_resid = -tmp; un->un_status = SUN_KEY_BOT; } break; } if (un->un_dp->options & ST_BSF) { skip_cnt = 1 - end_at_eof; /* * If we are going to end up at the beginning * of the file, we have to space one extra file * first, and then space forward later. */ tmp = -(mtop->mt_count + skip_cnt); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "skip_cnt=%x, tmp=%x\n", skip_cnt, tmp); if (st_cmd(dev, SCMD_SPACE, Fmk(tmp), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : bspace : can't space " "tmp"); rval = EIO; } } else { if (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD)) { rval = EIO; } else { skip_cnt = tmp + end_at_eof; } } /* * If we have to space forward, do so... */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "space forward skip_cnt=%x, rval=%x\n", skip_cnt, rval); if (rval == 0 && skip_cnt) { if (st_cmd(dev, SCMD_SPACE, Fmk(skip_cnt), SYNC_CMD)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : bspace : can't space " "skip_cnt"); rval = EIO; } else if (end_at_eof) { /* * If we had to space forward, and we're * not a tape that can backspace, mark state * as if we'd just seen a filemark during a * a read. */ if ((un->un_dp->options & ST_BSF) == 0) { un->un_eof = ST_EOF_PENDING; un->un_fileno -= 1; un->un_blkno = INF; } } } if (rval != 0) { un->un_fileno = -1; } break; } case MTNBSF: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "nbsf: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); /* * backward space file to beginning of file * * If a negative count (which implies a forward space op) * is specified, and we're at logical or physical eot, * bounce the request. */ if (un->un_eof >= ST_EOT && mtop->mt_count < 0) { un->un_err_resid = mtop->mt_count; un->un_status = SUN_KEY_EOT; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : > EOT and count < 0"); return (EIO); } /* * physical tape position may not be what we've been * telling the user; adjust the request accordingly */ if (IN_EOF(un)) { un->un_fileno++; un->un_blkno = 0; mtop->mt_count++; } if (st_check_density_or_wfm(dev, 1, 0, STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : MTNBSF check den and wfm"); return (EIO); } mtnbsf: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "mtnbsf: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); if (mtop->mt_count <= 0) { mtop->mt_op = MTFSF; mtop->mt_count = -mtop->mt_count; goto fspace; } goto bspace; case MTBSR: ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "bsr: count=%lx, eof=%x\n", mtop->mt_count, un->un_eof); /* * backward space into inter-record gap * * If a negative count (which implies a forward space op) * is specified, and we're at logical or physical eot, * bounce the request. */ if (un->un_eof >= ST_EOT && mtop->mt_count < 0) { un->un_err_resid = mtop->mt_count; un->un_status = SUN_KEY_EOT; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : MTBSR > EOT"); return (EIO); } if (mtop->mt_count == 0) { un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; un->un_err_resid = 0; if (IN_EOF(un) && SVR4_BEHAVIOR) { un->un_status = SUN_KEY_EOF; } return (0); } /* * physical tape position may not be what we've been * telling the user; adjust the position accordingly. * bsr can not skip filemarks and continue to skip records * therefore if we are logically before the filemark but * physically at the EOT side of the filemark, we need to step * back; this allows fsr N where N > number of blocks in file * followed by bsr 1 to position at the beginning of last block */ if (IN_EOF(un)) { int blkno = un->un_blkno; int fileno = un->un_fileno; uchar_t lastop = un->un_lastop; if (st_cmd(dev, SCMD_SPACE, Fmk((-1)), SYNC_CMD) == -1) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_write_fm : EIO : MTBSR can't space"); return (EIO); } un->un_blkno = blkno; un->un_fileno = fileno; un->un_lastop = lastop; } un->un_eof = ST_NO_EOF; if (st_check_density_or_wfm(dev, 1, 0, STEPBACK)) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : EIO : MTBSR : can't set density or " "wfm"); return (EIO); } mtop->mt_count = -mtop->mt_count; goto space_records; case MTSRSZ: /* * Set record-size to that sent by user * Check to see if there is reason that the requested * block size should not be set. */ /* If requesting variable block size is it ok? */ if ((mtop->mt_count == 0) && ((un->un_dp->options & ST_VARIABLE) == 0)) { return (ENOTTY); } /* * If requested block size is not variable "0", * is it less then minimum. */ if ((mtop->mt_count != 0) && (mtop->mt_count < un->un_minbsize)) { return (EINVAL); } /* Is the requested block size more then maximum */ if ((mtop->mt_count > min(un->un_maxbsize, un->un_maxdma)) && (un->un_maxbsize != 0)) { return (EINVAL); } /* Is requested block size a modulus the device likes */ if ((mtop->mt_count % un->un_data_mod) != 0) { return (EINVAL); } if (st_change_block_size(dev, (uint32_t)mtop->mt_count) != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl : MTSRSZ : EIO : cant set block size"); return (EIO); } return (0); case MTGRSZ: { #ifdef _MULTI_DATAMODEL /* * For use when a 32 bit app makes a call into a * 64 bit ioctl */ struct mtop32 mtop_32_for_64; #endif /* _MULTI_DATAMODEL */ /* * Get record-size to the user */ mtop->mt_count = un->un_bsize; #ifdef _MULTI_DATAMODEL switch (ddi_model_convert_from(flag & FMODELS)) { case DDI_MODEL_ILP32: /* * Convert 64 bit back to 32 bit before doing * copyout. This is what the ILP32 app expects. */ mtop_32_for_64.mt_op = mtop->mt_op; mtop_32_for_64.mt_count = mtop->mt_count; if (ddi_copyout(&mtop_32_for_64, (void *)arg, sizeof (struct mtop32), flag)) { return (EFAULT); } break; case DDI_MODEL_NONE: if (ddi_copyout(mtop, (void *)arg, sizeof (struct mtop), flag)) { return (EFAULT); } break; } #else /* ! _MULTI_DATAMODE */ if (ddi_copyout(mtop, (void *)arg, sizeof (struct mtop), flag)) return (EFAULT); #endif /* _MULTI_DATAMODE */ return (0); } default: rval = ENOTTY; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl: fileno=%x, blkno=%lx, un_eof=%x\n", un->un_fileno, un->un_blkno, un->un_eof); if (un->un_fileno < 0) { un->un_density_known = 0; } ASSERT(mutex_owned(ST_MUTEX)); return (rval); } /* * Run a command for uscsi ioctl. */ static int st_ioctl_cmd(dev_t dev, struct uscsi_cmd *ucmd, int flag) { struct uscsi_cmd *uscmd; struct buf *bp; enum uio_seg uioseg; int offline_state = 0; int err = 0; int rw; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl_cmd(dev = 0x%lx)\n", dev); ASSERT(mutex_owned(ST_MUTEX)); /* * We really don't know what commands are coming in here and * we don't want to limit the commands coming in. * * If st_tape_init() gets called from st_strategy(), then we * will hang the process waiting for un->un_sbuf_busy to be cleared, * which it never will, as we set it below. To prevent * st_tape_init() from getting called, we have to set state to other * than ST_STATE_OFFLINE, so we choose ST_STATE_INITIALIZING, which * achieves this purpose already. * * We use offline_state to preserve the OFFLINE state, if it exists, * so other entry points to the driver might have the chance to call * st_tape_init(). */ if (un->un_state == ST_STATE_OFFLINE) { un->un_laststate = ST_STATE_OFFLINE; un->un_state = ST_STATE_INITIALIZING; offline_state = 1; } mutex_exit(ST_MUTEX); err = scsi_uscsi_alloc_and_copyin((intptr_t)ucmd, flag, ROUTE, &uscmd); mutex_enter(ST_MUTEX); if (err != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl_cmd: scsi_uscsi_alloc_and_copyin failed\n"); goto exit; } uioseg = (flag & FKIOCTL) ? UIO_SYSSPACE : UIO_USERSPACE; rw = (uscmd->uscsi_flags & USCSI_READ) ? B_READ : B_WRITE; /* check to see if this command requires the drive to be reserved */ if (uscmd->uscsi_cdb != NULL) { err = st_check_cdb_for_need_to_reserve(un, &((char *)uscmd->uscsi_cdb)[0]); if (err) { goto exit_free; } } /* * Get buffer resources... */ while (un->un_sbuf_busy) cv_wait(&un->un_sbuf_cv, ST_MUTEX); un->un_sbuf_busy = 1; #ifdef STDEBUG if (uscmd->uscsi_cdb != NULL && st_debug > 6) { st_clean_print(ST_DEVINFO, st_label, SCSI_DEBUG, "uscsi cdb", uscmd->uscsi_cdb, uscmd->uscsi_cdblen); if (uscmd->uscsi_buflen) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "uscsi %s of %ld bytes %s %s space\n", (rw == B_READ) ? rd_str : wr_str, uscmd->uscsi_buflen, (rw == B_READ) ? "to" : "from", (uioseg == UIO_SYSSPACE) ? "system" : "user"); } } #endif /* ST_DEBUG */ /* * Although st_ioctl_cmd() never makes use of these * now, we are just being safe and consistent. */ uscmd->uscsi_flags &= ~(USCSI_NOINTR | USCSI_NOPARITY | USCSI_OTAG | USCSI_HTAG | USCSI_HEAD); un->un_srqbufp = uscmd->uscsi_rqbuf; bp = un->un_sbufp; bzero(bp, sizeof (buf_t)); if (uscmd->uscsi_cdb != NULL) { bp->b_forw = (struct buf *)(uintptr_t)((char *)uscmd->uscsi_cdb)[0]; bp->b_back = (struct buf *)uscmd; } mutex_exit(ST_MUTEX); err = scsi_uscsi_handle_cmd(dev, uioseg, uscmd, st_strategy, bp, NULL); mutex_enter(ST_MUTEX); /* * If scsi reset successful, don't write any filemarks. */ if ((err == 0) && (uscmd->uscsi_flags & (USCSI_RESET_LUN | USCSI_RESET_TARGET | USCSI_RESET_ALL))) { un->un_fmneeded = 0; } exit_free: /* * Free resources */ un->un_sbuf_busy = 0; un->un_srqbufp = NULL; cv_signal(&un->un_sbuf_cv); mutex_exit(ST_MUTEX); (void) scsi_uscsi_copyout_and_free((intptr_t)ucmd, uscmd); mutex_enter(ST_MUTEX); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_ioctl_cmd returns 0x%x\n", err); exit: /* don't lose offline state */ if (offline_state) un->un_state = ST_STATE_OFFLINE; ASSERT(mutex_owned(ST_MUTEX)); return (err); } static int st_write_fm(dev_t dev, int wfm) { int i; int rval; GET_SOFT_STATE(dev); ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_write_fm(dev = 0x%lx, wfm = %d)\n", dev, wfm); /* * write one filemark at the time after EOT */ if (un->un_eof >= ST_EOT) { for (i = 0; i < wfm; i++) { rval = st_cmd(dev, SCMD_WRITE_FILE_MARK, 1, SYNC_CMD); if (rval == EACCES) { return (rval); } if (rval != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_write_fm : EIO : write EOT file mark"); return (EIO); } } } else { rval = st_cmd(dev, SCMD_WRITE_FILE_MARK, wfm, SYNC_CMD); if (rval == EACCES) { return (rval); } if (rval) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_write_fm : EIO : write file mark"); return (EIO); } } ASSERT(mutex_owned(ST_MUTEX)); return (0); } #ifdef STDEBUG static void start_dump(struct scsi_tape *un, struct buf *bp) { struct scsi_pkt *pkt = BP_PKT(bp); uchar_t *cdbp = (uchar_t *)pkt->pkt_cdbp; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_start: cmd=0x%p count=%ld resid=%ld flags=0x%x pkt=0x%p\n", (void *)bp->b_forw, bp->b_bcount, bp->b_resid, bp->b_flags, (void *)BP_PKT(bp)); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_start: cdb %x %x %x %x %x %x, fileno=%d, blk=%ld\n", cdbp[0], cdbp[1], cdbp[2], cdbp[3], cdbp[4], cdbp[5], un->un_fileno, un->un_blkno); } #endif /* * Command start && done functions */ /* * st_start() * * Called from: * st_strategy() to start a command. * st_runout() to retry when scsi_pkt allocation fails on previous attempt(s). * st_attach() when resuming from power down state. * st_start_restart() to retry transport when device was previously busy. * st_done_and_mutex_exit() to start the next command when previous is done. * * On entry: * scsi_pkt may or may not be allocated. * */ static void st_start(struct scsi_tape *un) { struct buf *bp; int status; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_start(): dev = 0x%lx\n", un->un_dev); if ((bp = un->un_quef) == NULL) { return; } ASSERT((bp->b_flags & B_DONE) == 0); /* * Don't send more than un_throttle commands to the HBA */ if ((un->un_throttle <= 0) || (un->un_ncmds >= un->un_throttle)) { return; } /* * If the buf has no scsi_pkt call st_make_cmd() to get one and * build the command. */ if (BP_PKT(bp) == NULL) { ASSERT((bp->b_flags & B_DONE) == 0); st_make_cmd(un, bp, st_runout); ASSERT((bp->b_flags & B_DONE) == 0); status = geterror(bp); /* * Some HBA's don't call bioerror() to set an error. * And geterror() returns zero if B_ERROR is not set. * So if we get zero we must check b_error. */ if (status == 0 && bp->b_error != 0) { status = bp->b_error; bioerror(bp, status); } /* * Some HBA's convert DDI_DMA_NORESOURCES into ENOMEM. * In tape ENOMEM has special meaning so we'll change it. */ if (status == ENOMEM) { status = 0; bioerror(bp, status); } /* * Did it fail and is it retryable? * If so return and wait for the callback through st_runout. * Also looks like scsi_init_pkt() will setup a callback even * if it isn't retryable. */ if (BP_PKT(bp) == NULL) { if (status == 0) { /* * If first attempt save state. */ if (un->un_state != ST_STATE_RESOURCE_WAIT) { un->un_laststate = un->un_state; un->un_state = ST_STATE_RESOURCE_WAIT; } ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "temp no resources for pkt\n"); } else { /* * Unlikely that it would be retryable then not. */ if (un->un_state == ST_STATE_RESOURCE_WAIT) { un->un_state = un->un_laststate; } scsi_log(ST_DEVINFO, st_label, SCSI_DEBUG, "perm no resources for pkt errno = 0x%x\n", status); } return; } /* * Worked this time set the state back. */ if (un->un_state == ST_STATE_RESOURCE_WAIT) { un->un_state = un->un_laststate; } } /* * move from waitq to runq */ un->un_quef = bp->b_actf; if (un->un_quel == bp) { /* * For the case of queue having one * element, set the tail pointer to * point to the element. */ un->un_quel = bp->b_actf; } bp->b_actf = NULL; if (un->un_runqf) { un->un_runql->b_actf = bp; } else { un->un_runqf = bp; } un->un_runql = bp; #ifdef STDEBUG start_dump(un, bp); #endif /* could not get here if throttle was zero */ un->un_last_throttle = un->un_throttle; un->un_throttle = 0; /* so nothing else will come in here */ un->un_ncmds++; ST_DO_KSTATS(bp, kstat_waitq_to_runq); mutex_exit(ST_MUTEX); status = scsi_transport(BP_PKT(bp)); mutex_enter(ST_MUTEX); if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } if (status != TRAN_ACCEPT) { ST_DO_KSTATS(bp, kstat_runq_back_to_waitq); mutex_exit(ST_MUTEX); if (status == TRAN_BUSY) { /* if too many retries, fail the transport */ if (st_handle_start_busy(un, bp, ST_TRAN_BUSY_TIMEOUT) == 0) goto done; } scsi_log(ST_DEVINFO, st_label, CE_WARN, "transport rejected\n"); bp->b_resid = bp->b_bcount; #ifndef __lock_lint /* * warlock doesn't understand this potential * recursion? */ mutex_enter(ST_MUTEX); ST_DO_KSTATS(bp, kstat_waitq_exit); ST_DO_ERRSTATS(un, st_transerrs); st_bioerror(bp, EIO); SET_PE_FLAG(un); st_done_and_mutex_exit(un, bp); #endif } else { un->un_tran_retry_ct = 0; mutex_exit(ST_MUTEX); } done: mutex_enter(ST_MUTEX); } /* * if the transport is busy, then put this bp back on the waitq */ static int st_handle_start_busy(struct scsi_tape *un, struct buf *bp, clock_t timeout_interval) { struct buf *last_quef, *runq_bp; int rval = 0; mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_start_busy()\n"); /* * Check to see if we hit the retry timeout and one last check for * making sure this is the last on the runq, if it is not, we have * to fail */ if (((int)un->un_tran_retry_ct++ > st_retry_count) || (un->un_runql != bp)) { rval = -1; goto exit; } /* put the bp back on the waitq */ if (un->un_quef) { last_quef = un->un_quef; un->un_quef = bp; bp->b_actf = last_quef; } else { bp->b_actf = NULL; un->un_quef = bp; un->un_quel = bp; } /* * Decrement un_ncmds so that this * gets thru' st_start() again. */ un->un_ncmds--; /* * since this is an error case, we won't have to do * this list walking much. We've already made sure this bp was the * last on the runq */ runq_bp = un->un_runqf; if (un->un_runqf == bp) { un->un_runqf = NULL; un->un_runql = NULL; } else { while (runq_bp) { if (runq_bp->b_actf == bp) { runq_bp->b_actf = NULL; un->un_runql = runq_bp; break; } runq_bp = runq_bp->b_actf; } } /* * send a marker pkt, if appropriate */ st_hba_unflush(un); /* * all queues are aligned, we are just waiting to * transport, don't alloc any more buf p's, when * st_start is reentered. */ (void) timeout(st_start_restart, un, timeout_interval); exit: mutex_exit(ST_MUTEX); return (rval); } /* * st_runout a callback that is called what a resource allocatation failed */ static int st_runout(caddr_t arg) { struct scsi_tape *un = (struct scsi_tape *)arg; struct buf *bp; ASSERT(un != NULL); mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_runout()\n"); bp = un->un_quef; /* * failed scsi_init_pkt(). If errno is zero its retryable. */ if ((bp != NULL) && (geterror(bp) != 0)) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "errors after pkt alloc (b_flags=0x%x, b_error=0x%x)\n", bp->b_flags, geterror(bp)); ASSERT((bp->b_flags & B_DONE) == 0); un->un_quef = bp->b_actf; if (un->un_quel == bp) { /* * For the case of queue having one * element, set the tail pointer to * point to the element. */ un->un_quel = bp->b_actf; } mutex_exit(ST_MUTEX); bp->b_actf = NULL; ASSERT((bp->b_flags & B_DONE) == 0); /* * Set resid, Error already set, then unblock calling thread. */ bp->b_resid = bp->b_bcount; biodone(bp); } else { /* * Try Again */ st_start(un); mutex_exit(ST_MUTEX); } /* * Comments courtesy of sd.c * The scsi_init_pkt routine allows for the callback function to * return a 0 indicating the callback should be rescheduled or a 1 * indicating not to reschedule. This routine always returns 1 * because the driver always provides a callback function to * scsi_init_pkt. This results in a callback always being scheduled * (via the scsi_init_pkt callback implementation) if a resource * failure occurs. */ return (1); } /* * st_done_and_mutex_exit() * - remove bp from runq * - start up the next request * - if this was an asynch bp, clean up * - exit with released mutex */ static void st_done_and_mutex_exit(struct scsi_tape *un, struct buf *bp) { struct buf *runqbp, *prevbp; int pe_flagged = 0; ASSERT(MUTEX_HELD(&un->un_sd->sd_mutex)); #if !defined(lint) _NOTE(LOCK_RELEASED_AS_SIDE_EFFECT(&un->un_sd->sd_mutex)) #endif ASSERT(mutex_owned(ST_MUTEX)); /* * if bp is still on the runq (anywhere), then remove it */ prevbp = NULL; for (runqbp = un->un_runqf; runqbp != 0; runqbp = runqbp->b_actf) { if (runqbp == bp) { if (runqbp == un->un_runqf) { un->un_runqf = bp->b_actf; } else { prevbp->b_actf = bp->b_actf; } if (un->un_runql == bp) { un->un_runql = prevbp; } break; } prevbp = runqbp; } bp->b_actf = NULL; un->un_ncmds--; cv_signal(&un->un_queue_cv); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_done_and_mutex_exit(): cmd=0x%x count=%ld resid=%ld flags=0x%x\n", (uchar_t)*((caddr_t)(BP_PKT(bp))->pkt_cdbp), bp->b_bcount, bp->b_resid, bp->b_flags); /* * update kstats with transfer count info */ if (un->un_stats && (bp != un->un_sbufp) && IS_RW(bp)) { uint32_t n_done = bp->b_bcount - bp->b_resid; if (bp->b_flags & B_READ) { IOSP->reads++; IOSP->nread += n_done; } else { IOSP->writes++; IOSP->nwritten += n_done; } } /* * Start the next one before releasing resources on this one, if * there is something on the queue and persistent errors has not been * flagged */ if ((pe_flagged = IS_PE_FLAG_SET(un)) != 0) { un->un_last_resid = bp->b_resid; un->un_last_count = bp->b_bcount; } if (un->un_pwr_mgmt == ST_PWR_SUSPENDED) { cv_broadcast(&un->un_tape_busy_cv); } else if (un->un_quef && un->un_throttle && !pe_flagged) { st_start(un); } if (bp == un->un_sbufp && (bp->b_flags & B_ASYNC)) { /* * Since we marked this ourselves as ASYNC, * there isn't anybody around waiting for * completion any more. */ uchar_t com = (uchar_t)(uintptr_t)bp->b_forw; if (com == SCMD_READ || com == SCMD_WRITE) { bp->b_un.b_addr = (caddr_t)0; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_done_and_mutex_exit(async): freeing pkt\n"); scsi_destroy_pkt(BP_PKT(bp)); un->un_sbuf_busy = 0; cv_signal(&un->un_sbuf_cv); mutex_exit(ST_MUTEX); return; } if (bp == un->un_sbufp && BP_UCMD(bp)) { /* * Copy status from scsi_pkt to uscsi_cmd * since st_ioctl_cmd needs it */ BP_UCMD(bp)->uscsi_status = SCBP_C(BP_PKT(bp)); } #ifdef STDEBUG if ((st_debug >= 4) && (((un->un_blkno % 100) == 0) || IS_PE_FLAG_SET(un))) { ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_d_a_m_exit(): ncmds = %d, thr = %d, " "un_errno = %d, un_pe = %d\n", un->un_ncmds, un->un_throttle, un->un_errno, un->un_persist_errors); } #endif mutex_exit(ST_MUTEX); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_done_and_mutex_exit: freeing pkt\n"); scsi_destroy_pkt(BP_PKT(bp)); biodone(bp); /* * now that we biodoned that command, if persistent errors have been * flagged, flush the waitq */ if (pe_flagged) st_flush(un); } /* * Tape error, flush tape driver queue. */ static void st_flush(struct scsi_tape *un) { struct buf *bp; mutex_enter(ST_MUTEX); ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_flush(), ncmds = %d, quef = 0x%p\n", un->un_ncmds, (void *)un->un_quef); /* * if we still have commands outstanding, wait for them to come in * before flushing the queue, and make sure there is a queue */ if (un->un_ncmds || !un->un_quef) goto exit; /* * we have no more commands outstanding, so let's deal with special * cases in the queue for EOM and FM. If we are here, and un_errno * is 0, then we know there was no error and we return a 0 read or * write before showing errors */ /* Flush the wait queue. */ while ((bp = un->un_quef) != NULL) { un->un_quef = bp->b_actf; bp->b_resid = bp->b_bcount; ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_flush() : blkno=%ld, err=%d, b_bcount=%ld\n", un->un_blkno, un->un_errno, bp->b_bcount); st_set_pe_errno(un); bioerror(bp, un->un_errno); mutex_exit(ST_MUTEX); /* it should have one, but check anyway */ if (BP_PKT(bp)) { scsi_destroy_pkt(BP_PKT(bp)); } biodone(bp); mutex_enter(ST_MUTEX); } /* * It's not a bad practice to reset the * waitq tail pointer to NULL. */ un->un_quel = NULL; exit: /* we mucked with the queue, so let others know about it */ cv_signal(&un->un_queue_cv); mutex_exit(ST_MUTEX); } /* * Utility functions */ static int st_determine_generic(dev_t dev) { int bsize; static char *cart = "0.25 inch cartridge"; char *sizestr; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_determine_generic(dev = 0x%lx)\n", dev); ASSERT(mutex_owned(ST_MUTEX)); if (st_modesense(un)) { return (-1); } bsize = (un->un_mspl->high_bl << 16) | (un->un_mspl->mid_bl << 8) | (un->un_mspl->low_bl); if (bsize == 0) { un->un_dp->options |= ST_VARIABLE; un->un_dp->bsize = 0; un->un_bsize = 0; } else if (bsize > ST_MAXRECSIZE_FIXED) { /* * record size of this device too big. * try and convert it to variable record length. * */ un->un_dp->options |= ST_VARIABLE; if (st_change_block_size(dev, 0) != 0) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "Fixed Record Size %d is too large\n", bsize); ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "Cannot switch to variable record size\n"); un->un_dp->options &= ~ST_VARIABLE; return (-1); } } else if (st_change_block_size(dev, 0) == 0) { /* * If the drive was set to a non zero block size, * See if it can be set to a zero block size. * If it works, ST_VARIABLE so user can set it as they want. */ un->un_dp->options |= ST_VARIABLE; un->un_dp->bsize = 0; un->un_bsize = 0; } else { un->un_dp->bsize = bsize; un->un_bsize = bsize; } switch (un->un_mspl->density) { default: case 0x0: /* * default density, cannot determine any other * information. */ sizestr = "Unknown type- assuming 0.25 inch cartridge"; un->un_dp->type = ST_TYPE_DEFAULT; un->un_dp->options |= (ST_AUTODEN_OVERRIDE|ST_QIC); break; case 0x1: case 0x2: case 0x3: case 0x6: /* * 1/2" reel */ sizestr = "0.50 inch reel"; un->un_dp->type = ST_TYPE_REEL; un->un_dp->options |= ST_REEL; un->un_dp->densities[0] = 0x1; un->un_dp->densities[1] = 0x2; un->un_dp->densities[2] = 0x6; un->un_dp->densities[3] = 0x3; break; case 0x4: case 0x5: case 0x7: case 0x0b: /* * Quarter inch. */ sizestr = cart; un->un_dp->type = ST_TYPE_DEFAULT; un->un_dp->options |= ST_QIC; un->un_dp->densities[1] = 0x4; un->un_dp->densities[2] = 0x5; un->un_dp->densities[3] = 0x7; un->un_dp->densities[0] = 0x0b; break; case 0x0f: case 0x10: case 0x11: case 0x12: /* * QIC-120, QIC-150, QIC-320, QIC-600 */ sizestr = cart; un->un_dp->type = ST_TYPE_DEFAULT; un->un_dp->options |= ST_QIC; un->un_dp->densities[0] = 0x0f; un->un_dp->densities[1] = 0x10; un->un_dp->densities[2] = 0x11; un->un_dp->densities[3] = 0x12; break; case 0x09: case 0x0a: case 0x0c: case 0x0d: /* * 1/2" cartridge tapes. Include HI-TC. */ sizestr = cart; sizestr[2] = '5'; sizestr[3] = '0'; un->un_dp->type = ST_TYPE_HIC; un->un_dp->densities[0] = 0x09; un->un_dp->densities[1] = 0x0a; un->un_dp->densities[2] = 0x0c; un->un_dp->densities[3] = 0x0d; break; case 0x13: /* DDS-2/DDS-3 scsi spec densities */ case 0x24: case 0x25: case 0x26: sizestr = "DAT Data Storage (DDS)"; un->un_dp->type = ST_TYPE_DAT; un->un_dp->options |= ST_AUTODEN_OVERRIDE; break; case 0x14: /* * Helical Scan (Exabyte) devices */ sizestr = "8mm helical scan cartridge"; un->un_dp->type = ST_TYPE_EXABYTE; un->un_dp->options |= ST_AUTODEN_OVERRIDE; break; } /* * Assume LONG ERASE, BSF and BSR */ un->un_dp->options |= (ST_LONG_ERASE|ST_UNLOADABLE|ST_BSF| ST_BSR|ST_KNOWS_EOD); /* * Only if mode sense data says no buffered write, set NOBUF */ if (un->un_mspl->bufm == 0) un->un_dp->options |= ST_NOBUF; /* * set up large read and write retry counts */ un->un_dp->max_rretries = un->un_dp->max_wretries = 1000; /* * If this is a 0.50 inch reel tape, and * it is *not* variable mode, try and * set it to variable record length * mode. */ if ((un->un_dp->options & ST_REEL) && un->un_bsize != 0 && (un->un_dp->options & ST_VARIABLE)) { if (st_change_block_size(dev, 0) == 0) { un->un_dp->bsize = 0; un->un_mspl->high_bl = un->un_mspl->mid_bl = un->un_mspl->low_bl = 0; } } /* * Write to console about type of device found */ ST_DEBUG6(ST_DEVINFO, st_label, CE_NOTE, "Generic Drive, Vendor=%s\n\t%s", un->un_dp->name, sizestr); if (un->un_dp->options & ST_VARIABLE) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "!Variable record length I/O\n"); } else { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "!Fixed record length (%d byte blocks) I/O\n", un->un_dp->bsize); } ASSERT(mutex_owned(ST_MUTEX)); return (0); } static int st_determine_density(dev_t dev, int rw) { int rval = 0; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_determine_density(dev = 0x%lx, rw = %s)\n", dev, (rw == B_WRITE ? wr_str: rd_str)); ASSERT(mutex_owned(ST_MUTEX)); /* * If we're past BOT, density is determined already. */ if (un->un_fileno > 0 || (un->un_fileno == 0 && un->un_blkno != 0)) { /* * XXX: put in a bitch message about attempting to * XXX: change density past BOT. */ goto exit; } /* * If we're going to be writing, we set the density */ if (rw == 0 || rw == B_WRITE) { /* un_curdens is used as an index into densities table */ un->un_curdens = MT_DENSITY(un->un_dev); if (st_set_density(dev)) { rval = -1; } goto exit; } /* * If density is known already, * we don't have to get it again.(?) */ if (!un->un_density_known) { if (st_get_density(dev)) { rval = -1; } } exit: ASSERT(mutex_owned(ST_MUTEX)); return (rval); } /* * Try to determine density. We do this by attempting to read the * first record off the tape, cycling through the available density * codes as we go. */ static int st_get_density(dev_t dev) { int succes = 0, rval = -1, i; uint_t size; uchar_t dens, olddens; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_get_density(dev = 0x%lx)\n", dev); ASSERT(mutex_owned(ST_MUTEX)); /* * If Auto Density override is enabled The drive has * only one density and there is no point in attempting * find the correct one. * * Since most modern drives auto detect the density * and format of the recorded media before they come * ready. What this function does is a legacy behavior * and modern drives not only don't need it, The backup * utilities that do positioning via uscsi find the un- * expected rewinds problematic. * * The drives that need this are old reel to reel devices. * I took a swag and said they must be scsi-1 or older. * I don't beleave there will any of the newer devices * that need this. There will be some scsi-1 devices that * don't need this but I don't think they will be using the * BIG aftermarket backup and restore utilitys. */ if ((un->un_dp->options & ST_AUTODEN_OVERRIDE) || (un->un_sd->sd_inq->inq_ansi > 1)) { un->un_density_known = 1; rval = 0; goto exit; } /* * This will only work on variable record length tapes * if and only if all variable record length tapes autodensity * select. */ size = (unsigned)(un->un_dp->bsize ? un->un_dp->bsize : SECSIZE); un->un_tmpbuf = kmem_alloc(size, KM_SLEEP); /* * Start at the specified density */ dens = olddens = un->un_curdens = MT_DENSITY(un->un_dev); for (i = 0; i < NDENSITIES; i++, ((un->un_curdens == NDENSITIES - 1) ? (un->un_curdens = 0) : (un->un_curdens += 1))) { /* * If we've done this density before, * don't bother to do it again. */ dens = un->un_dp->densities[un->un_curdens]; if (i > 0 && dens == olddens) continue; olddens = dens; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "trying density 0x%x\n", dens); if (st_set_density(dev)) { continue; } /* * XXX - the creates lots of headaches and slowdowns - must * fix. */ succes = (st_cmd(dev, SCMD_READ, (int)size, SYNC_CMD) == 0); if (st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD)) { break; } if (succes) { st_init(un); rval = 0; un->un_density_known = 1; break; } } kmem_free(un->un_tmpbuf, size); un->un_tmpbuf = 0; exit: ASSERT(mutex_owned(ST_MUTEX)); return (rval); } static int st_set_density(dev_t dev) { int rval = 0; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_set_density(dev = 0x%lx): density = 0x%x\n", dev, un->un_dp->densities[un->un_curdens]); ASSERT(mutex_owned(ST_MUTEX)); un->un_mspl->density = un->un_dp->densities[un->un_curdens]; if ((un->un_dp->options & ST_AUTODEN_OVERRIDE) == 0) { /* * If auto density override is not set, Use mode select * to set density and compression. */ if (st_modeselect(un)) { rval = -1; } } else if ((un->un_dp->options & ST_MODE_SEL_COMP) != 0) { /* * If auto density and mode select compression are set, * This is a drive with one density code but compression * can be enabled or disabled. * Set compression but no need to set density. */ rval = st_set_compression(un); if ((rval != 0) && (rval != EALREADY)) { rval = -1; } else { rval = 0; } } /* If sucessful set density and/or compression, mark density known */ if (rval == 0) { un->un_density_known = 1; } ASSERT(mutex_owned(ST_MUTEX)); return (rval); } static int st_loadtape(dev_t dev) { int rval; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_loadtape(dev = 0x%lx)\n", dev); ASSERT(mutex_owned(ST_MUTEX)); /* * 'LOAD' the tape to BOT by rewinding */ rval = st_cmd(dev, SCMD_REWIND, 1, SYNC_CMD); if (rval == 0) { st_init(un); un->un_density_known = 0; } ASSERT(mutex_owned(ST_MUTEX)); return (rval); } /* * Note: QIC devices aren't so smart. If you try to append * after EOM, the write can fail because the device doesn't know * it's at EOM. In that case, issue a read. The read should fail * because there's no data, but the device knows it's at EOM, * so a subsequent write should succeed. To further confuse matters, * the target returns the same error if the tape is positioned * such that a write would overwrite existing data. That's why * we have to do the append test. A read in the middle of * recorded data would succeed, thus indicating we're attempting * something illegal. */ void bp_mapin(struct buf *bp); static void st_test_append(struct buf *bp) { dev_t dev = bp->b_edev; struct scsi_tape *un; uchar_t status; unsigned bcount; un = ddi_get_soft_state(st_state, MTUNIT(dev)); ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_test_append(): fileno %d\n", un->un_fileno); un->un_laststate = un->un_state; un->un_state = ST_STATE_APPEND_TESTING; un->un_test_append = 0; /* * first, map in the buffer, because we're doing a double write -- * first into the kernel, then onto the tape. */ bp_mapin(bp); /* * get a copy of the data.... */ un->un_tmpbuf = kmem_alloc((unsigned)bp->b_bcount, KM_SLEEP); bcopy(bp->b_un.b_addr, un->un_tmpbuf, (uint_t)bp->b_bcount); /* * attempt the write.. */ if (st_cmd(dev, (int)SCMD_WRITE, (int)bp->b_bcount, SYNC_CMD) == 0) { success: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "append write succeeded\n"); bp->b_resid = un->un_sbufp->b_resid; mutex_exit(ST_MUTEX); bcount = (unsigned)bp->b_bcount; biodone(bp); mutex_enter(ST_MUTEX); un->un_laststate = un->un_state; un->un_state = ST_STATE_OPEN; kmem_free(un->un_tmpbuf, bcount); un->un_tmpbuf = NULL; return; } /* * The append failed. Do a short read. If that fails, we are at EOM * so we can retry the write command. If that succeeds, than we're * all screwed up (the controller reported a real error). * * XXX: should the dummy read be > SECSIZE? should it be the device's * XXX: block size? * */ status = un->un_status; un->un_status = 0; (void) st_cmd(dev, SCMD_READ, SECSIZE, SYNC_CMD); if (un->un_status == KEY_BLANK_CHECK) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "append at EOM\n"); /* * Okay- the read failed. We should actually have confused * the controller enough to allow writing. In any case, the * i/o is on its own from here on out. */ un->un_laststate = un->un_state; un->un_state = ST_STATE_OPEN; bcopy(bp->b_un.b_addr, un->un_tmpbuf, (uint_t)bp->b_bcount); if (st_cmd(dev, (int)SCMD_WRITE, (int)bp->b_bcount, SYNC_CMD) == 0) { goto success; } } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "append write failed- not at EOM\n"); bp->b_resid = bp->b_bcount; st_bioerror(bp, EIO); ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_test_append : EIO : append write failed - not at EOM"); /* * backspace one record to get back to where we were */ if (st_cmd(dev, SCMD_SPACE, Blk(-1), SYNC_CMD)) { un->un_fileno = -1; } un->un_err_resid = bp->b_resid; un->un_status = status; /* * Note: biodone will do a bp_mapout() */ mutex_exit(ST_MUTEX); bcount = (unsigned)bp->b_bcount; biodone(bp); mutex_enter(ST_MUTEX); un->un_laststate = un->un_state; un->un_state = ST_STATE_OPEN_PENDING_IO; kmem_free(un->un_tmpbuf, bcount); un->un_tmpbuf = NULL; } /* * Special command handler */ /* * common st_cmd code. The fourth parameter states * whether the caller wishes to await the results * Note the release of the mutex during most of the function */ static int st_cmd(dev_t dev, int com, int count, int wait) { struct buf *bp; int err; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_cmd(dev = 0x%lx, com = 0x%x, count = %x, wait = %d)\n", dev, com, count, wait); ASSERT(MUTEX_HELD(&un->un_sd->sd_mutex)); ASSERT(mutex_owned(ST_MUTEX)); #ifdef STDEBUG if (st_debug) st_debug_cmds(un, com, count, wait); #endif /* check to see if this command requires the drive to be reserved */ err = st_check_cmd_for_need_to_reserve(un, com, count); if (err) { return (err); } while (un->un_sbuf_busy) cv_wait(&un->un_sbuf_cv, ST_MUTEX); un->un_sbuf_busy = 1; bp = un->un_sbufp; bzero(bp, sizeof (buf_t)); bp->b_flags = (wait) ? B_BUSY : B_BUSY|B_ASYNC; /* * Set count to the actual size of the data tranfer. * For commands with no data transfer, set bp->b_bcount * to the value to be used when constructing the * cdb in st_make_cmd(). */ switch (com) { case SCMD_READ: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "special read %d\n", count); bp->b_flags |= B_READ; bp->b_un.b_addr = un->un_tmpbuf; break; case SCMD_WRITE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "special write %d\n", count); bp->b_un.b_addr = un->un_tmpbuf; break; case SCMD_WRITE_FILE_MARK: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "write %d file marks\n", count); bp->b_bcount = count; count = 0; break; case SCMD_REWIND: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "rewind\n"); bp->b_bcount = 0; count = 0; break; case SCMD_SPACE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "space\n"); bp->b_bcount = count; count = 0; break; case SCMD_RESERVE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "reserve"); bp->b_bcount = 0; count = 0; break; case SCMD_RELEASE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "release"); bp->b_bcount = 0; count = 0; break; case SCMD_LOAD: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "%s tape\n", (count) ? "load" : "unload"); bp->b_bcount = count; count = 0; break; case SCMD_ERASE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "erase tape\n"); bp->b_bcount = 0; count = 0; break; case SCMD_MODE_SENSE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "mode sense\n"); bp->b_flags |= B_READ; bp->b_un.b_addr = (caddr_t)(un->un_mspl); break; case SCMD_MODE_SELECT: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "mode select\n"); bp->b_un.b_addr = (caddr_t)(un->un_mspl); break; case SCMD_READ_BLKLIM: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "read block limits\n"); bp->b_flags |= B_READ; bp->b_un.b_addr = (caddr_t)(un->un_rbl); break; case SCMD_TEST_UNIT_READY: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "test unit ready\n"); bp->b_bcount = 0; count = 0; break; default: ST_DEBUG(ST_DEVINFO, st_label, CE_PANIC, "Unhandled scsi command 0x%x in st_cmd()\n", com); } mutex_exit(ST_MUTEX); if (count > 0) { /* * We're going to do actual I/O. * Set things up for physio. */ struct iovec aiov; struct uio auio; struct uio *uio = &auio; bzero(&auio, sizeof (struct uio)); bzero(&aiov, sizeof (struct iovec)); aiov.iov_base = bp->b_un.b_addr; aiov.iov_len = count; uio->uio_iov = &aiov; uio->uio_iovcnt = 1; uio->uio_resid = aiov.iov_len; uio->uio_segflg = UIO_SYSSPACE; /* * Let physio do the rest... */ bp->b_forw = (struct buf *)(uintptr_t)com; bp->b_back = NULL; err = physio(st_strategy, bp, dev, (bp->b_flags & B_READ) ? B_READ : B_WRITE, st_minphys, uio); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_cmd: physio returns %d\n", err); } else { /* * Mimic physio */ bp->b_forw = (struct buf *)(uintptr_t)com; bp->b_back = NULL; bp->b_edev = dev; bp->b_dev = cmpdev(dev); bp->b_blkno = 0; bp->b_resid = 0; (void) st_strategy(bp); if (!wait) { /* * This is an async command- the caller won't wait * and doesn't care about errors. */ mutex_enter(ST_MUTEX); return (0); } /* * BugTraq #4260046 * ---------------- * Restore Solaris 2.5.1 behavior, namely call biowait * unconditionally. The old comment said... * * "if strategy was flagged with persistent errors, we would * have an error here, and the bp would never be sent, so we * don't want to wait on a bp that was never sent...or hang" * * The new rationale, courtesy of Chitrank... * * "we should unconditionally biowait() here because * st_strategy() will do a biodone() in the persistent error * case and the following biowait() will return immediately. * If not, in the case of "errors after pkt alloc" in * st_start(), we will not biowait here which will cause the * next biowait() to return immediately which will cause * us to send out the next command. In the case where both of * these use the sbuf, when the first command completes we'll * free the packet attached to sbuf and the same pkt will * get freed again when we complete the second command. * see esc 518987. BTW, it is necessary to do biodone() in * st_start() for the pkt alloc failure case because physio() * does biowait() and will hang if we don't do biodone()" */ err = biowait(bp); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_cmd: biowait returns %d\n", err); } mutex_enter(ST_MUTEX); un->un_sbuf_busy = 0; cv_signal(&un->un_sbuf_cv); return (err); } static int st_set_compression(struct scsi_tape *un) { int rval; int turn_compression_on; minor_t minor; /* * Drive either dosn't have compression or it is controlled with * special density codes. Return ENOTTY so caller * knows nothing was done. */ if ((un->un_dp->options & ST_MODE_SEL_COMP) == 0) { un->un_comp_page = 0; return (ENOTTY); } /* set compression based on minor node opened */ minor = MT_DENSITY(un->un_dev); /* * If this the compression density or * the drive has two densities and uses mode select for * control of compression turn on compression for MT_DENSITY2 * as well. */ if ((minor == ST_COMPRESSION_DENSITY) || (minor == MT_DENSITY(MT_DENSITY2)) && (un->un_dp->densities[0] == un->un_dp->densities[1]) && (un->un_dp->densities[2] == un->un_dp->densities[3]) && (un->un_dp->densities[0] != un->un_dp->densities[2])) { turn_compression_on = 1; } else { turn_compression_on = 0; } un->un_mspl->high_bl = (uchar_t)(un->un_bsize >> 16); un->un_mspl->mid_bl = (uchar_t)(un->un_bsize >> 8); un->un_mspl->low_bl = (uchar_t)(un->un_bsize); /* * Need to determine which page does the device use for compression. * First try the data compression page. If this fails try the device * configuration page */ if ((un->un_comp_page & ST_DEV_DATACOMP_PAGE) == ST_DEV_DATACOMP_PAGE) { rval = st_set_datacomp_page(un, turn_compression_on); if (rval == EALREADY) { return (rval); } if (rval != 0) { if (un->un_status == KEY_ILLEGAL_REQUEST) { /* * This device does not support data * compression page */ un->un_comp_page = ST_DEV_CONFIG_PAGE; } else if (un->un_state >= ST_STATE_OPEN) { un->un_fileno = -1; rval = EIO; } else { rval = -1; } } else { un->un_comp_page = ST_DEV_DATACOMP_PAGE; } } if ((un->un_comp_page & ST_DEV_CONFIG_PAGE) == ST_DEV_CONFIG_PAGE) { rval = st_set_devconfig_page(un, turn_compression_on); if (rval == EALREADY) { return (rval); } if (rval != 0) { if (un->un_status == KEY_ILLEGAL_REQUEST) { /* * This device does not support * compression at all advice the * user and unset ST_MODE_SEL_COMP */ un->un_dp->options &= ~ST_MODE_SEL_COMP; un->un_comp_page = 0; scsi_log(ST_DEVINFO, st_label, CE_NOTE, "Device Does Not Support Compression\n"); } else if (un->un_state >= ST_STATE_OPEN) { un->un_fileno = -1; rval = EIO; } else { rval = -1; } } } return (rval); } /* * set or unset compression thru device configuration page. */ static int st_set_devconfig_page(struct scsi_tape *un, int compression_on) { unsigned char cflag; int rval = 0; ASSERT(mutex_owned(ST_MUTEX)); /* * Figure what to set compression flag to. */ if (compression_on) { /* They have selected a compression node */ if (un->un_dp->type == ST_TYPE_FUJI) { cflag = 0x84; /* use EDRC */ } else { cflag = ST_DEV_CONFIG_DEF_COMP; } } else { cflag = ST_DEV_CONFIG_NO_COMP; } /* * If compression is already set the way it was requested. * And if this not the first time we has tried. */ if ((cflag == un->un_mspl->page.dev.comp_alg) && (un->un_comp_page == ST_DEV_DATACOMP_PAGE)) { return (EALREADY); } un->un_mspl->page.dev.comp_alg = cflag; /* * need to send mode select even if correct compression is * already set since need to set density code */ #ifdef STDEBUG if (st_debug >= 6) { st_clean_print(ST_DEVINFO, st_label, SCSI_DEBUG, "st_set_devconfig_page: sense data for mode select", (char *)un->un_mspl, sizeof (struct seq_mode)); } #endif rval = st_gen_mode_select(un, un->un_mspl, sizeof (struct seq_mode)); return (rval); } /* * set/reset compression bit thru data compression page */ static int st_set_datacomp_page(struct scsi_tape *un, int compression_on) { int compression_on_already; int rval = 0; ASSERT(mutex_owned(ST_MUTEX)); /* * If drive is not capable of compression (at this time) * return EALREADY so caller doesn't think that this page * is not supported. This check is for drives that can * disable compression from the front panel or configuration. * I doubt that a drive that supports this page is not really * capable of compression. */ if (un->un_mspl->page.comp.dcc == 0) { return (EALREADY); } /* See if compression currently turned on */ if (un->un_mspl->page.comp.dce) { compression_on_already = 1; } else { compression_on_already = 0; } /* * If compression is already set the way it was requested. * And if this not the first time we has tried. */ if ((compression_on == compression_on_already) && (un->un_comp_page == ST_DEV_DATACOMP_PAGE)) { return (EALREADY); } /* * if we are already set to the appropriate compression * mode, don't set it again */ if (compression_on) { /* compression selected */ un->un_mspl->page.comp.dce = 1; } else { un->un_mspl->page.comp.dce = 0; } #ifdef STDEBUG if (st_debug >= 6) { st_clean_print(ST_DEVINFO, st_label, SCSI_DEBUG, "st_set_datacomp_page: sense data for mode select", (char *)un->un_mspl, sizeof (struct seq_mode)); } #endif rval = st_gen_mode_select(un, un->un_mspl, sizeof (struct seq_mode)); return (rval); } static int st_modesense(struct scsi_tape *un) { int rval; uchar_t page; page = un->un_comp_page; switch (page) { case ST_DEV_DATACOMP_PAGE: case ST_DEV_CONFIG_PAGE: /* fall through */ rval = st_gen_mode_sense(un, page, un->un_mspl, sizeof (struct seq_mode)); break; case ST_DEV_DATACOMP_PAGE | ST_DEV_CONFIG_PAGE: if (un->un_dp->options & ST_MODE_SEL_COMP) { page = ST_DEV_DATACOMP_PAGE; rval = st_gen_mode_sense(un, page, un->un_mspl, sizeof (struct seq_mode)); if (rval == 0 && un->un_mspl->page_code == page) { un->un_comp_page = page; break; } page = ST_DEV_CONFIG_PAGE; rval = st_gen_mode_sense(un, page, un->un_mspl, sizeof (struct seq_mode)); if (rval == 0 && un->un_mspl->page_code == page) { un->un_comp_page = page; break; } un->un_dp->options &= ~ST_MODE_SEL_COMP; un->un_comp_page = 0; } else { un->un_comp_page = 0; } default: /* fall through */ rval = st_cmd(un->un_dev, SCMD_MODE_SENSE, MSIZE, SYNC_CMD); } return (rval); } static int st_modeselect(struct scsi_tape *un) { int rval = 0; int ix; ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_modeselect(dev = 0x%lx): density = 0x%x\n", un->un_dev, un->un_mspl->density); ASSERT(mutex_owned(ST_MUTEX)); /* * The parameter list should be the same for all of the * cases that follow so set them here * * Try mode select first if if fails set fields manually */ rval = st_modesense(un); if (rval != 0) { ST_DEBUG3(ST_DEVINFO, st_label, CE_WARN, "st_modeselect: First mode sense failed\n"); un->un_mspl->bd_len = 8; un->un_mspl->high_nb = 0; un->un_mspl->mid_nb = 0; un->un_mspl->low_nb = 0; } un->un_mspl->high_bl = (uchar_t)(un->un_bsize >> 16); un->un_mspl->mid_bl = (uchar_t)(un->un_bsize >> 8); un->un_mspl->low_bl = (uchar_t)(un->un_bsize); /* * If configured to use a specific density code for a media type. * curdens is previously set by the minor node opened. * If the media type doesn't match the minor node we change it so it * looks like the correct one was opened. */ if (un->un_dp->options & ST_KNOWS_MEDIA) { uchar_t best; for (best = 0xff, ix = 0; ix < NDENSITIES; ix++) { if (un->un_mspl->media_type == un->un_dp->mediatype[ix]) { best = ix; /* * It matches but it might not be the only one. * Use the highest matching media type but not * to exceed the density selected by the open. */ if (ix < un->un_curdens) { continue; } un->un_curdens = ix; break; } } /* If a match was found best will not be 0xff any more */ if (best < NDENSITIES) { ST_DEBUG3(ST_DEVINFO, st_label, CE_WARN, "found media 0x%X using density 0x%X\n", un->un_mspl->media_type, un->un_dp->densities[best]); un->un_mspl->density = un->un_dp->densities[best]; } else { /* Otherwise set density based on minor node opened */ un->un_mspl->density = un->un_dp->densities[un->un_curdens]; } } else { un->un_mspl->density = un->un_dp->densities[un->un_curdens]; } if (un->un_dp->options & ST_NOBUF) { un->un_mspl->bufm = 0; } else { un->un_mspl->bufm = 1; } rval = st_set_compression(un); /* * If st_set_compression returned invalid or already it * found no need to do the mode select. * So do it here. */ if ((rval == ENOTTY) || (rval == EALREADY)) { /* Zero non-writeable fields */ un->un_mspl->data_len = 0; un->un_mspl->media_type = 0; un->un_mspl->wp = 0; /* need to set the density code */ rval = st_cmd(un->un_dev, SCMD_MODE_SELECT, MSIZE, SYNC_CMD); if (rval != 0) { if (un->un_state >= ST_STATE_OPEN) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "unable to set tape mode\n"); un->un_fileno = -1; rval = EIO; } else { rval = -1; } } } /* * The spec recommends to send a mode sense after a mode select */ (void) st_modesense(un); ASSERT(mutex_owned(ST_MUTEX)); return (rval); } /* * st_gen_mode_sense * * generic mode sense.. it allows for any page */ static int st_gen_mode_sense(struct scsi_tape *un, int page, struct seq_mode *page_data, int page_size) { int r; char cdb[CDB_GROUP0]; struct uscsi_cmd *com; com = kmem_zalloc(sizeof (*com), KM_SLEEP); bzero(cdb, CDB_GROUP0); cdb[0] = SCMD_MODE_SENSE; cdb[2] = (char)page; cdb[4] = (char)page_size; com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP0; com->uscsi_bufaddr = (caddr_t)page_data; com->uscsi_buflen = page_size; com->uscsi_timeout = un->un_dp->non_motion_timeout; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; r = st_ioctl_cmd(un->un_dev, com, FKIOCTL); kmem_free(com, sizeof (*com)); return (r); } /* * st_gen_mode_select * * generic mode select.. it allows for any page */ static int st_gen_mode_select(struct scsi_tape *un, struct seq_mode *page_data, int page_size) { int r; char cdb[CDB_GROUP0]; struct uscsi_cmd *com; /* Zero non-writeable fields */ page_data->data_len = 0; page_data->media_type = 0; page_data->wp = 0; /* * If mode select has any page data, zero the ps (Page Savable) bit. */ if (page_size > MSIZE) { page_data->ps = 0; } com = kmem_zalloc(sizeof (*com), KM_SLEEP); /* * then, do a mode select to set what ever info */ bzero(cdb, CDB_GROUP0); cdb[0] = SCMD_MODE_SELECT; cdb[1] = 0x10; /* set PF bit for many third party drives */ cdb[4] = (char)page_size; com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP0; com->uscsi_bufaddr = (caddr_t)page_data; com->uscsi_buflen = page_size; com->uscsi_timeout = un->un_dp->non_motion_timeout; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_WRITE; r = st_ioctl_cmd(un->un_dev, com, FKIOCTL); kmem_free(com, sizeof (*com)); return (r); } /* * Changes devices blocksize and bsize to requested blocksize nblksz. * Returns returned value from first failed call or zero on success. */ static int st_change_block_size(dev_t dev, uint32_t nblksz) { struct seq_mode *current; int rval; uint32_t oldblksz; GET_SOFT_STATE(dev); current = kmem_zalloc(MSIZE, KM_SLEEP); /* Read current settings */ rval = st_gen_mode_sense(un, 0, current, MSIZE); if (rval != 0) { scsi_log(ST_DEVINFO, st_label, SCSI_DEBUG, "mode sense for change block size failed: rval = %d", rval); goto finish; } /* Figure the current block size */ oldblksz = (current->high_bl << 16) | (current->mid_bl << 8) | (current->low_bl); /* If current block size is the same as requested were done */ if (oldblksz == nblksz) { un->un_bsize = nblksz; rval = 0; goto finish; } /* Change to requested block size */ current->high_bl = (uchar_t)(nblksz >> 16); current->mid_bl = (uchar_t)(nblksz >> 8); current->low_bl = (uchar_t)(nblksz); /* Attempt to change block size */ rval = st_gen_mode_select(un, current, MSIZE); if (rval != 0) { scsi_log(ST_DEVINFO, st_label, SCSI_DEBUG, "Set new block size failed: rval = %d", rval); goto finish; } /* Read back and verify setting */ rval = st_modesense(un); if (rval == 0) { un->un_bsize = (un->un_mspl->high_bl << 16) | (un->un_mspl->mid_bl << 8) | (un->un_mspl->low_bl); if (un->un_bsize != nblksz) { scsi_log(ST_DEVINFO, st_label, SCSI_DEBUG, "Blocksize set does not equal requested blocksize" "(read: %u requested: %u)\n", nblksz, un->un_bsize); rval = EIO; } } finish: kmem_free(current, MSIZE); return (rval); } static void st_init(struct scsi_tape *un) { ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_init(): dev = 0x%lx, will reset fileno, blkno, eof\n", un->un_dev); un->un_blkno = 0; un->un_fileno = 0; un->un_lastop = ST_OP_NIL; un->un_eof = ST_NO_EOF; un->un_pwr_mgmt = ST_PWR_NORMAL; if (st_error_level != SCSI_ERR_ALL) { if (DEBUGGING) { st_error_level = SCSI_ERR_ALL; } else { st_error_level = SCSI_ERR_RETRYABLE; } } } static void st_make_cmd(struct scsi_tape *un, struct buf *bp, int (*func)(caddr_t)) { struct scsi_pkt *pkt; struct uscsi_cmd *ucmd; int count, tval = 0; int flags = 0; uchar_t com; char fixbit; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_make_cmd(): dev = 0x%lx\n", un->un_dev); /* * fixbit is for setting the Fixed Mode and Suppress Incorrect * Length Indicator bits on read/write commands, for setting * the Long bit on erase commands, and for setting the Code * Field bits on space commands. * XXX why do we set lastop here? */ if (bp != un->un_sbufp) { /* regular raw I/O */ int stat_size = (un->un_arq_enabled ? sizeof (struct scsi_arq_status) : 1); pkt = scsi_init_pkt(ROUTE, NULL, bp, CDB_GROUP0, stat_size, 0, 0, func, (caddr_t)un); if (pkt == NULL) { goto exit; } SET_BP_PKT(bp, pkt); if (un->un_bsize == 0) { count = bp->b_bcount; fixbit = 0; } else { count = bp->b_bcount / un->un_bsize; fixbit = 1; } if (bp->b_flags & B_READ) { com = SCMD_READ; un->un_lastop = ST_OP_READ; if ((un->un_bsize == 0) && /* Not Fixed Block */ (un->un_dp->options & ST_READ_IGNORE_ILI)) { fixbit = 2; } } else { com = SCMD_WRITE; un->un_lastop = ST_OP_WRITE; } tval = un->un_dp->io_timeout; /* * For really large xfers, increase timeout */ if (bp->b_bcount > (10 * ONE_MEG)) tval *= bp->b_bcount/(10 * ONE_MEG); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "%s %ld amt 0x%lx\n", (com == SCMD_WRITE) ? wr_str: rd_str, un->un_blkno, bp->b_bcount); } else if ((ucmd = BP_UCMD(bp)) != NULL) { /* * uscsi - build command, allocate scsi resources */ st_make_uscsi_cmd(un, ucmd, bp, func); goto exit; } else { /* special I/O */ struct buf *allocbp = NULL; int stat_size = (un->un_arq_enabled ? sizeof (struct scsi_arq_status) : 1); com = (uchar_t)(uintptr_t)bp->b_forw; count = bp->b_bcount; switch (com) { case SCMD_READ: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "special read %d\n", count); if (un->un_bsize == 0) { fixbit = 2; /* suppress SILI */ } else { fixbit = 1; /* Fixed Block Mode */ count /= un->un_bsize; } allocbp = bp; un->un_lastop = ST_OP_READ; tval = un->un_dp->io_timeout; break; case SCMD_WRITE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "special write %d\n", count); if (un->un_bsize != 0) { fixbit = 1; /* Fixed Block Mode */ count /= un->un_bsize; } else { fixbit = 0; } allocbp = bp; un->un_lastop = ST_OP_WRITE; tval = un->un_dp->io_timeout; break; case SCMD_WRITE_FILE_MARK: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "write %d file marks\n", count); un->un_lastop = ST_OP_WEOF; fixbit = 0; tval = un->un_dp->io_timeout; break; case SCMD_REWIND: if (bp->b_flags & B_ASYNC) { fixbit = 1; } else { fixbit = 0; } count = 0; un->un_lastop = ST_OP_CTL; tval = un->un_dp->rewind_timeout; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "rewind\n"); break; case SCMD_SPACE: fixbit = Isfmk(count); count = (int)space_cnt(count); ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "space %d %s from file %d blk %ld\n", count, (fixbit) ? "filemarks" : "records", un->un_fileno, un->un_blkno); un->un_lastop = ST_OP_CTL; tval = un->un_dp->space_timeout; break; case SCMD_LOAD: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "%s tape\n", (count & 1) ? "load" : "unload"); fixbit = 0; /* Loading or Unloading */ if (count & 1) { tval = un->un_dp->load_timeout; } else { tval = un->un_dp->unload_timeout; } /* Is Retension requested */ if (count & 2) { tval += un->un_dp->rewind_timeout; } un->un_lastop = ST_OP_CTL; break; case SCMD_ERASE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "erase tape\n"); count = 0; /* * We support long erase only */ fixbit = 1; tval = un->un_dp->erase_timeout; un->un_lastop = ST_OP_CTL; break; case SCMD_MODE_SENSE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "mode sense\n"); allocbp = bp; fixbit = 0; tval = un->un_dp->non_motion_timeout; break; case SCMD_MODE_SELECT: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "mode select\n"); allocbp = bp; fixbit = 0; tval = un->un_dp->non_motion_timeout; break; case SCMD_RESERVE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "reserve\n"); fixbit = 0; tval = un->un_dp->non_motion_timeout; break; case SCMD_RELEASE: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "release\n"); fixbit = 0; tval = un->un_dp->non_motion_timeout; break; case SCMD_READ_BLKLIM: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "read block limits\n"); allocbp = bp; fixbit = count = 0; tval = un->un_dp->non_motion_timeout; break; case SCMD_TEST_UNIT_READY: ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "test unit ready\n"); fixbit = 0; tval = un->un_dp->non_motion_timeout; break; default: ST_DEBUG(ST_DEVINFO, st_label, CE_PANIC, "Unhandled scsi command 0x%x in st_make_cmd()\n", com); } pkt = scsi_init_pkt(ROUTE, NULL, allocbp, CDB_GROUP0, stat_size, 0, 0, func, (caddr_t)un); if (pkt == NULL) { goto exit; } if (allocbp) ASSERT(geterror(allocbp) == 0); } (void) scsi_setup_cdb((union scsi_cdb *)pkt->pkt_cdbp, com, 0, (uint_t)count, 0); FILL_SCSI1_LUN(un->un_sd, pkt); /* * Initialize the SILI/Fixed bits of the byte 1 of cdb. */ ((union scsi_cdb *)(pkt->pkt_cdbp))->t_code = fixbit; pkt->pkt_flags = flags; /* * If ST_SHORT_FILEMARKS bit is ON for EXABYTE * device, set the Vendor Unique bit to * write Short File Mark. */ if (com == SCMD_WRITE_FILE_MARK && un->un_dp->options & ST_SHORT_FILEMARKS) { switch (un->un_dp->type) { case ST_TYPE_EXB8500: case ST_TYPE_EXABYTE: /* * Now the Vendor Unique bit 7 in Byte 5 of CDB * is set to to write Short File Mark */ ((union scsi_cdb *)pkt->pkt_cdbp)->g0_vu_1 = 1; break; default: /* * Well, if ST_SHORT_FILEMARKS is set for other * tape drives, it is just ignored */ break; } } ASSERT(tval); pkt->pkt_time = tval; pkt->pkt_comp = st_intr; pkt->pkt_private = (opaque_t)bp; SET_BP_PKT(bp, pkt); exit: ASSERT(mutex_owned(ST_MUTEX)); } /* * Build a command based on a uscsi command; */ static void st_make_uscsi_cmd(struct scsi_tape *un, struct uscsi_cmd *ucmd, struct buf *bp, int (*func)(caddr_t)) { struct scsi_pkt *pkt; caddr_t cdb; int cdblen; int stat_size; ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_make_uscsi_cmd(): dev = 0x%lx\n", un->un_dev); if (ucmd->uscsi_flags & USCSI_RQENABLE) { stat_size = (un->un_arq_enabled ? sizeof (struct scsi_arq_status) : 1); } else { stat_size = 1; } ASSERT(mutex_owned(ST_MUTEX)); un->un_lastop = ST_OP_CTL; /* usual */ cdb = ucmd->uscsi_cdb; cdblen = ucmd->uscsi_cdblen; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_make_uscsi_cmd: buflen=%ld bcount=%ld\n", ucmd->uscsi_buflen, bp->b_bcount); pkt = scsi_init_pkt(ROUTE, NULL, (bp->b_bcount > 0) ? bp : NULL, cdblen, stat_size, 0, 0, func, (caddr_t)un); if (pkt == NULL) { goto exit; } bcopy(cdb, pkt->pkt_cdbp, (uint_t)cdblen); #ifdef STDEBUG if (st_debug >= 6) { st_clean_print(ST_DEVINFO, st_label, SCSI_DEBUG, "pkt_cdbp", (char *)cdb, cdblen); } #endif if (ucmd->uscsi_flags & USCSI_SILENT) { pkt->pkt_flags |= FLAG_SILENT; } pkt->pkt_time = ucmd->uscsi_timeout; pkt->pkt_comp = st_intr; pkt->pkt_private = (opaque_t)bp; SET_BP_PKT(bp, pkt); exit: ASSERT(mutex_owned(ST_MUTEX)); } /* * restart cmd currently at the head of the runq * * If scsi_transport() succeeds or the retries * count exhausted, restore the throttle that was * zeroed out in st_handle_intr_busy(). * */ static void st_intr_restart(void *arg) { struct scsi_tape *un = arg; struct buf *bp; int status = TRAN_ACCEPT; mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_intr_restart(), un = 0x%p\n", (void *)un); un->un_hib_tid = 0; /* * move from waitq to runq, if there is anything on the waitq */ if ((bp = un->un_quef) == NULL) { mutex_exit(ST_MUTEX); return; } /* * Here we know : * throttle = 0, via st_handle_intr_busy */ if (un->un_quel == bp) { un->un_quel = NULL; un->un_quef = NULL; /* we know it's the first one */ } else { un->un_quef = bp->b_actf; } bp->b_actf = NULL; if (un->un_runqf) { /* * not good, we don't want to requeue something after * another. */ mutex_exit(ST_MUTEX); goto done_error; } else { un->un_runqf = bp; un->un_runql = bp; } ST_DO_KSTATS(bp, kstat_waitq_to_runq); mutex_exit(ST_MUTEX); status = scsi_transport(BP_PKT(bp)); mutex_enter(ST_MUTEX); if (status != TRAN_ACCEPT) { ST_DO_KSTATS(bp, kstat_runq_back_to_waitq); mutex_exit(ST_MUTEX); if (status == TRAN_BUSY) { if (st_handle_intr_busy(un, bp, ST_TRAN_BUSY_TIMEOUT) == 0) return; /* timeout is setup again */ } } else { un->un_tran_retry_ct = 0; if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } mutex_exit(ST_MUTEX); return; } done_error: ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "restart transport rejected\n"); bp->b_resid = bp->b_bcount; #ifndef __lock_lint /* * warlock doesn't understand this potential * recursion? */ mutex_enter(ST_MUTEX); if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } if (status != TRAN_ACCEPT) ST_DO_ERRSTATS(un, st_transerrs); ST_DO_KSTATS(bp, kstat_waitq_exit); SET_PE_FLAG(un); st_bioerror(bp, EIO); st_done_and_mutex_exit(un, bp); #endif ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "busy restart aborted\n"); } /* * st_check_media(): * Periodically check the media state using scsi_watch service; * this service calls back after TUR and possibly request sense * the callback handler (st_media_watch_cb()) decodes the request sense * data (if any) */ static int st_check_media(dev_t dev, enum mtio_state state) { int rval = 0; enum mtio_state prev_state; opaque_t token = NULL; GET_SOFT_STATE(dev); mutex_enter(ST_MUTEX); ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media:state=%x, mediastate=%x\n", state, un->un_mediastate); prev_state = un->un_mediastate; /* * is there anything to do? */ retry: if (state == un->un_mediastate || un->un_mediastate == MTIO_NONE) { /* * submit the request to the scsi_watch service; * scsi_media_watch_cb() does the real work */ mutex_exit(ST_MUTEX); token = scsi_watch_request_submit(ST_SCSI_DEVP, st_check_media_time, SENSE_LENGTH, st_media_watch_cb, (caddr_t)dev); if (token == NULL) { rval = EAGAIN; goto done; } mutex_enter(ST_MUTEX); un->un_swr_token = token; un->un_specified_mediastate = state; /* * now wait for media change * we will not be signalled unless mediastate == state but it * still better to test for this condition, since there * is a 5 sec cv_broadcast delay when * mediastate == MTIO_INSERTED */ ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media:waiting for media state change\n"); while (un->un_mediastate == state) { if (cv_wait_sig(&un->un_state_cv, ST_MUTEX) == 0) { mutex_exit(ST_MUTEX); ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media:waiting for media state " "was interrupted\n"); rval = EINTR; goto done; } ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media:received signal, state=%x\n", un->un_mediastate); } } /* * if we transitioned to MTIO_INSERTED, media has really been * inserted. If TUR fails, it is probably a exabyte slow spin up. * Reset and retry the state change. If everything is ok, replay * the open() logic. */ if ((un->un_mediastate == MTIO_INSERTED) && (un->un_state == ST_STATE_OFFLINE)) { ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media: calling st_cmd to confirm inserted\n"); /* * set this early so that TUR will make it through strategy * without triggering a st_tape_init(). We needed it set * before calling st_tape_init() ourselves anyway. If TUR * fails, set it back */ un->un_state = ST_STATE_INITIALIZING; /* * If not reserved fail as getting reservation conflict * will make this hang forever. */ if ((un->un_rsvd_status & (ST_RESERVE | ST_APPLICATION_RESERVATIONS)) == 0) { mutex_exit(ST_MUTEX); rval = EACCES; goto done; } rval = st_cmd(dev, SCMD_TEST_UNIT_READY, 0, SYNC_CMD); if (rval == EACCES) { ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media: TUR got Reservation Conflict\n"); mutex_exit(ST_MUTEX); goto done; } if (rval) { ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media: TUR failed, going to retry\n"); un->un_mediastate = prev_state; un->un_state = ST_STATE_OFFLINE; goto retry; } ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media: media inserted\n"); /* this also rewinds the tape */ rval = st_tape_init(dev); if (rval != 0) { ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media : OFFLINE init failure "); un->un_state = ST_STATE_OFFLINE; un->un_fileno = -1; } else { un->un_state = ST_STATE_OPEN_PENDING_IO; un->un_fileno = 0; un->un_blkno = 0; } } else if ((un->un_mediastate == MTIO_EJECTED) && (un->un_state != ST_STATE_OFFLINE)) { /* * supported devices must be rewound before ejection * rewind resets fileno & blkno */ un->un_laststate = un->un_state; un->un_state = ST_STATE_OFFLINE; } mutex_exit(ST_MUTEX); done: if (token) { (void) scsi_watch_request_terminate(token, SCSI_WATCH_TERMINATE_WAIT); mutex_enter(ST_MUTEX); un->un_swr_token = (opaque_t)NULL; mutex_exit(ST_MUTEX); } ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_media: done\n"); return (rval); } /* * st_media_watch_cb() is called by scsi_watch_thread for * verifying the request sense data (if any) */ static int st_media_watch_cb(caddr_t arg, struct scsi_watch_result *resultp) { struct scsi_status *statusp = resultp->statusp; struct scsi_extended_sense *sensep = resultp->sensep; uchar_t actual_sense_length = resultp->actual_sense_length; struct scsi_tape *un; enum mtio_state state = MTIO_NONE; int instance; dev_t dev = (dev_t)arg; instance = MTUNIT(dev); if ((un = ddi_get_soft_state(st_state, instance)) == NULL) { return (-1); } mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: status=%x, sensep=%p, len=%x\n", *((char *)statusp), (void *)sensep, actual_sense_length); /* * if there was a check condition then sensep points to valid * sense data * if status was not a check condition but a reservation or busy * status then the new state is MTIO_NONE */ if (sensep) { ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: KEY=%x, ASC=%x, ASCQ=%x\n", sensep->es_key, sensep->es_add_code, sensep->es_qual_code); switch (un->un_dp->type) { default: ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: unknown drive type %d, default to ST_TYPE_HP\n", un->un_dp->type); /* FALLTHROUGH */ case ST_TYPE_STC3490: /* STK 4220 1/2" cartridge */ case ST_TYPE_FUJI: /* 1/2" cartridge */ case ST_TYPE_HP: /* HP 88780 1/2" reel */ if (un->un_dp->type == ST_TYPE_FUJI) { ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: ST_TYPE_FUJI\n"); } else { ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: ST_TYPE_HP\n"); } switch (sensep->es_key) { case KEY_UNIT_ATTENTION: /* not ready to ready transition */ /* hp/es_qual_code == 80 on>off>on */ /* hp/es_qual_code == 0 on>off>unld>ld>on */ if (sensep->es_add_code == 0x28) { state = MTIO_INSERTED; } break; case KEY_NOT_READY: /* in process, rewinding or loading */ if ((sensep->es_add_code == 0x04) && (sensep->es_qual_code == 0x00)) { state = MTIO_EJECTED; } break; } break; case ST_TYPE_EXB8500: /* Exabyte 8500 */ ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: ST_TYPE_EXB8500\n"); switch (sensep->es_key) { case KEY_UNIT_ATTENTION: /* operator medium removal request */ if ((sensep->es_add_code == 0x5a) && (sensep->es_qual_code == 0x01)) { state = MTIO_EJECTED; /* not ready to ready transition */ } else if ((sensep->es_add_code == 0x28) && (sensep->es_qual_code == 0x00)) { state = MTIO_INSERTED; } break; case KEY_NOT_READY: /* medium not present */ if (sensep->es_add_code == 0x3a) { state = MTIO_EJECTED; } break; } break; case ST_TYPE_EXABYTE: /* Exabyte 8200 */ ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb: ST_TYPE_EXABYTE\n"); switch (sensep->es_key) { case KEY_NOT_READY: if ((sensep->es_add_code == 0x04) && (sensep->es_qual_code == 0x00)) { /* volume not mounted? */ state = MTIO_EJECTED; } else if (sensep->es_add_code == 0x3a) { state = MTIO_EJECTED; } break; case KEY_UNIT_ATTENTION: state = MTIO_EJECTED; break; } break; case ST_TYPE_DLT: /* quantum DLT4xxx */ switch (sensep->es_key) { case KEY_UNIT_ATTENTION: if (sensep->es_add_code == 0x28) { state = MTIO_INSERTED; } break; case KEY_NOT_READY: if (sensep->es_add_code == 0x04) { /* in transition but could be either */ state = un->un_specified_mediastate; } else if ((sensep->es_add_code == 0x3a) && (sensep->es_qual_code == 0x00)) { state = MTIO_EJECTED; } break; } break; } } else if (*((char *)statusp) == STATUS_GOOD) { state = MTIO_INSERTED; } ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb:state=%x, specified=%x\n", state, un->un_specified_mediastate); /* * now signal the waiting thread if this is *not* the specified state; * delay the signal if the state is MTIO_INSERTED * to allow the target to recover */ if (state != un->un_specified_mediastate) { un->un_mediastate = state; if (state == MTIO_INSERTED) { /* * delay the signal to give the drive a chance * to do what it apparently needs to do */ ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb:delayed cv_broadcast\n"); un->un_delay_tid = timeout(st_delayed_cv_broadcast, un, drv_usectohz((clock_t)MEDIA_ACCESS_DELAY)); } else { ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_media_watch_cb:immediate cv_broadcast\n"); cv_broadcast(&un->un_state_cv); } } mutex_exit(ST_MUTEX); return (0); } /* * delayed cv_broadcast to allow for target to recover * from media insertion */ static void st_delayed_cv_broadcast(void *arg) { struct scsi_tape *un = arg; ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_delayed_cv_broadcast:delayed cv_broadcast\n"); mutex_enter(ST_MUTEX); cv_broadcast(&un->un_state_cv); mutex_exit(ST_MUTEX); } /* * restart cmd currently at the start of the waitq */ static void st_start_restart(void *arg) { struct scsi_tape *un = arg; ASSERT(un != NULL); mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_tran_restart()\n"); if (un->un_quef) { st_start(un); } mutex_exit(ST_MUTEX); } /* * Command completion processing * */ static void st_intr(struct scsi_pkt *pkt) { struct scsi_tape *un; struct buf *last_runqf; struct buf *bp; int action = COMMAND_DONE; clock_t timout; int status; bp = (struct buf *)pkt->pkt_private; un = ddi_get_soft_state(st_state, MTUNIT(bp->b_edev)); mutex_enter(ST_MUTEX); un->un_rqs_state &= ~(ST_RQS_ERROR); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_intr()\n"); if (pkt->pkt_reason != CMD_CMPLT) { /* If device has gone away not much else to do */ if (pkt->pkt_reason == CMD_DEV_GONE) { action = COMMAND_DONE_ERROR; } else if (un->un_state == ST_STATE_SENSING) { ST_DO_ERRSTATS(un, st_transerrs); action = COMMAND_DONE_ERROR; } else { action = st_handle_incomplete(un, bp); } /* * At this point we know that the command was successfully * completed. Now what? */ } else if (un->un_arq_enabled && (pkt->pkt_state & STATE_ARQ_DONE)) { /* * the transport layer successfully completed an autorqsense */ action = st_handle_autosense(un, bp); } else if (un->un_state == ST_STATE_SENSING) { /* * okay. We were running a REQUEST SENSE. Find * out what to do next. * some actions are based on un_state, hence * restore the state st was in before ST_STATE_SENSING. */ un->un_state = un->un_laststate; action = st_handle_sense(un, bp); /* * set pkt back to original packet in case we will have * to requeue it */ pkt = BP_PKT(bp); } else if ((SCBP(pkt)->sts_busy) || (SCBP(pkt)->sts_chk)) { /* * Okay, we weren't running a REQUEST SENSE. Call a routine * to see if the status bits we're okay. If a request sense * is to be run, that will happen. */ action = st_check_error(un, pkt); } if (un->un_pwr_mgmt == ST_PWR_SUSPENDED) { switch (action) { case QUE_COMMAND: /* * return cmd to head to the queue * since we are suspending so that * it gets restarted during resume */ if (un->un_runqf) { last_runqf = un->un_runqf; un->un_runqf = bp; bp->b_actf = last_runqf; } else { bp->b_actf = NULL; un->un_runqf = bp; un->un_runql = bp; } action = JUST_RETURN; break; case QUE_SENSE: action = COMMAND_DONE_ERROR; break; default: break; } } /* * Restore old state if we were sensing. */ if (un->un_state == ST_STATE_SENSING && action != QUE_SENSE) { un->un_state = un->un_laststate; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_intr: pkt=%p, bp=%p, action=%x, status=%x\n", (void *)pkt, (void *)bp, action, SCBP_C(pkt)); switch (action) { case COMMAND_DONE_EACCES: /* this is to report a reservation conflict */ st_bioerror(bp, EACCES); ST_DEBUG(ST_DEVINFO, st_label, SCSI_DEBUG, "Reservation Conflict \n"); /*FALLTHROUGH*/ case COMMAND_DONE_ERROR: if (un->un_eof < ST_EOT_PENDING && un->un_state >= ST_STATE_OPEN) { /* * all errors set state of the tape to 'unknown' * unless we're at EOT or are doing append testing. * If sense key was illegal request, preserve state. */ if (un->un_status != KEY_ILLEGAL_REQUEST) { un->un_fileno = -1; } } un->un_err_resid = bp->b_resid = bp->b_bcount; /* * since we have an error (COMMAND_DONE_ERROR), we want to * make sure an error ocurrs, so make sure at least EIO is * returned */ if (geterror(bp) == 0) st_bioerror(bp, EIO); SET_PE_FLAG(un); if (!(un->un_rqs_state & ST_RQS_ERROR) && (un->un_errno == EIO)) { un->un_rqs_state &= ~(ST_RQS_VALID); } goto done; case COMMAND_DONE_ERROR_RECOVERED: un->un_err_resid = bp->b_resid = bp->b_bcount; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_intr(): COMMAND_DONE_ERROR_RECOVERED"); if (geterror(bp) == 0) st_bioerror(bp, EIO); SET_PE_FLAG(un); if (!(un->un_rqs_state & ST_RQS_ERROR) && (un->un_errno == EIO)) { un->un_rqs_state &= ~(ST_RQS_VALID); } /*FALLTHROUGH*/ case COMMAND_DONE: st_set_state(un); done: ST_DO_KSTATS(bp, kstat_runq_exit); st_done_and_mutex_exit(un, bp); return; case QUE_SENSE: if ((un->un_ncmds > 1) && !un->un_flush_on_errors) goto sense_error; if (un->un_state != ST_STATE_SENSING) { un->un_laststate = un->un_state; un->un_state = ST_STATE_SENSING; } un->un_rqs->pkt_private = (opaque_t)bp; bzero(ST_RQSENSE, SENSE_LENGTH); if (un->un_throttle) { un->un_last_throttle = un->un_throttle; un->un_throttle = 0; } mutex_exit(ST_MUTEX); /* * never retry this, some other command will have nuked the * sense, anyway */ status = scsi_transport(un->un_rqs); mutex_enter(ST_MUTEX); if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } if (status == TRAN_ACCEPT) { mutex_exit(ST_MUTEX); return; } if (status != TRAN_BUSY) ST_DO_ERRSTATS(un, st_transerrs); sense_error: un->un_fileno = -1; st_bioerror(bp, EIO); SET_PE_FLAG(un); goto done; case QUE_BUSY_COMMAND: /* longish timeout */ timout = ST_STATUS_BUSY_TIMEOUT; goto que_it_up; case QUE_COMMAND: /* short timeout */ timout = ST_TRAN_BUSY_TIMEOUT; que_it_up: /* * let st_handle_intr_busy put this bp back on waitq and make * checks to see if it is ok to requeue the command. */ ST_DO_KSTATS(bp, kstat_runq_back_to_waitq); /* * Save the throttle before setting up the timeout */ if (un->un_throttle) { un->un_last_throttle = un->un_throttle; } mutex_exit(ST_MUTEX); if (st_handle_intr_busy(un, bp, timout) == 0) return; /* timeout is setup again */ mutex_enter(ST_MUTEX); un->un_fileno = -1; un->un_err_resid = bp->b_resid = bp->b_bcount; st_bioerror(bp, EIO); SET_PE_FLAG(un); goto done; case QUE_LAST_COMMAND: if ((un->un_ncmds > 1) && !un->un_flush_on_errors) { scsi_log(ST_DEVINFO, st_label, CE_CONT, "un_ncmds: %d can't retry cmd \n", un->un_ncmds); goto last_command_error; } mutex_exit(ST_MUTEX); if (st_handle_intr_retry_lcmd(un, bp) == 0) return; mutex_enter(ST_MUTEX); last_command_error: un->un_err_resid = bp->b_resid = bp->b_bcount; un->un_fileno = -1; st_bioerror(bp, EIO); SET_PE_FLAG(un); goto done; case JUST_RETURN: default: ST_DO_KSTATS(bp, kstat_runq_back_to_waitq); mutex_exit(ST_MUTEX); return; } /*NOTREACHED*/ } static int st_handle_incomplete(struct scsi_tape *un, struct buf *bp) { static char *fail = "SCSI transport failed: reason '%s': %s\n"; int rval = COMMAND_DONE_ERROR; struct scsi_pkt *pkt = (un->un_state == ST_STATE_SENSING) ? un->un_rqs : BP_PKT(bp); int result; ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_incomplete(): dev = 0x%lx\n", un->un_dev); ASSERT(mutex_owned(ST_MUTEX)); switch (pkt->pkt_reason) { case CMD_INCOMPLETE: /* tran stopped with not normal state */ /* * this occurs when accessing a powered down drive, no * need to complain; just fail the open */ #ifdef STDEBUG if (st_debug >= 1) { st_clean_print(ST_DEVINFO, st_label, CE_WARN, "Failed CDB", (char *)pkt->pkt_cdbp, CDB_SIZE); } #endif /* * if we have commands outstanding in HBA, and a command * comes back incomplete, we're hosed, so reset target * If we have the bus, but cmd_incomplete, we probably just * have a failed selection, so don't reset the target, just * requeue the command and try again */ if ((un->un_ncmds > 1) || (pkt->pkt_state != STATE_GOT_BUS)) { goto reset_target; } /* * Retry selection a couple more times if we're * open. If opening, we only try just once to * reduce probe time for nonexistant devices. */ if ((un->un_laststate > ST_STATE_OPENING) && ((int)un->un_retry_ct < st_selection_retry_count)) { rval = QUE_COMMAND; } ST_DO_ERRSTATS(un, st_transerrs); break; case CMD_ABORTED: /* * most likely this is caused by flush-on-error support. If * it was not there, the we're in trouble. */ if (!un->un_flush_on_errors) { un->un_status = SUN_KEY_FATAL; goto reset_target; } st_set_pe_errno(un); bioerror(bp, un->un_errno); if (un->un_errno) return (COMMAND_DONE_ERROR); else return (COMMAND_DONE); case CMD_TIMEOUT: /* Command timed out */ un->un_status = SUN_KEY_TIMEOUT; /*FALLTHROUGH*/ default: reset_target: ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "transport completed with %s\n", scsi_rname(pkt->pkt_reason)); ST_DO_ERRSTATS(un, st_transerrs); if ((pkt->pkt_state & STATE_GOT_TARGET) && ((pkt->pkt_statistics & (STAT_BUS_RESET | STAT_DEV_RESET | STAT_ABORTED)) == 0)) { /* * If we haven't reserved the drive don't reset it. */ if ((un->un_rsvd_status & (ST_RESERVE | ST_APPLICATION_RESERVATIONS)) == 0) { return (rval); } mutex_exit(ST_MUTEX); result = scsi_reset(ROUTE, RESET_TARGET); /* * if target reset fails, then pull the chain */ if (result == 0) { result = scsi_reset(ROUTE, RESET_ALL); } mutex_enter(ST_MUTEX); if ((result == 0) && (un->un_state >= ST_STATE_OPEN)) { /* no hope left to recover */ scsi_log(ST_DEVINFO, st_label, CE_WARN, "recovery by resets failed\n"); return (rval); } } } if ((pkt->pkt_reason == CMD_RESET) || (pkt->pkt_statistics & (STAT_BUS_RESET | STAT_DEV_RESET))) { if ((un->un_rsvd_status & ST_RESERVE)) { un->un_rsvd_status |= ST_LOST_RESERVE; ST_DEBUG3(ST_DEVINFO, st_label, CE_WARN, "Lost Reservation\n"); } } if ((int)un->un_retry_ct++ < st_retry_count) { if (un->un_pwr_mgmt == ST_PWR_SUSPENDED) { rval = QUE_COMMAND; } else if (bp == un->un_sbufp) { switch ((uchar_t)(uintptr_t)bp->b_forw) { case SCMD_MODE_SENSE: case SCMD_MODE_SELECT: case SCMD_READ_BLKLIM: case SCMD_REWIND: case SCMD_LOAD: case SCMD_TEST_UNIT_READY: /* * These commands can be rerun with impunity */ rval = QUE_COMMAND; break; default: break; } } } else { rval = COMMAND_DONE_ERROR; } if (un->un_state >= ST_STATE_OPEN) { scsi_log(ST_DEVINFO, st_label, CE_WARN, fail, scsi_rname(pkt->pkt_reason), (rval == COMMAND_DONE_ERROR)? "giving up" : "retrying command"); } return (rval); } /* * if the device is busy, then put this bp back on the waitq, on the * interrupt thread, where we want the head of the queue and not the * end * * The callers of this routine should take measures to save the * un_throttle in un_last_throttle which will be restored in * st_intr_restart(). The only exception should be st_intr_restart() * calling this routine for which the saving is already done. */ static int st_handle_intr_busy(struct scsi_tape *un, struct buf *bp, clock_t timeout_interval) { struct buf *last_quef; int rval = 0; mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_intr_busy(), un = 0x%p\n", (void *)un); /* * Check to see if we hit the retry timeout. We check to make sure * this is the first one on the runq and make sure we have not * queued up any more, so this one has to be the last on the list * also. If it is not, we have to fail. If it is not the first, but * is the last we are in trouble anyway, as we are in the interrupt * context here. */ if (((int)un->un_tran_retry_ct++ > st_retry_count) || ((un->un_runqf != bp) && (un->un_runql != bp))) { rval = -1; goto exit; } /* put the bp back on the waitq */ if (un->un_quef) { last_quef = un->un_quef; un->un_quef = bp; bp->b_actf = last_quef; } else { bp->b_actf = NULL; un->un_quef = bp; un->un_quel = bp; } /* * We know that this is the first and last on the runq at this time, * so we just nullify those two queues */ un->un_runqf = NULL; un->un_runql = NULL; /* * We don't want any other commands being started in the mean time. * If start had just released mutex after putting something on the * runq, we won't even get here. */ un->un_throttle = 0; /* * send a marker pkt, if appropriate */ st_hba_unflush(un); /* * all queues are aligned, we are just waiting to * transport */ un->un_hib_tid = timeout(st_intr_restart, un, timeout_interval); exit: mutex_exit(ST_MUTEX); return (rval); } static int st_handle_sense(struct scsi_tape *un, struct buf *bp) { struct scsi_pkt *rqpkt = un->un_rqs; int rval = COMMAND_DONE_ERROR; int amt; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_sense()\n"); if (SCBP(rqpkt)->sts_busy) { ST_DEBUG4(ST_DEVINFO, st_label, CE_WARN, "busy unit on request sense\n"); if ((int)un->un_retry_ct++ < st_retry_count) { rval = QUE_BUSY_COMMAND; } return (rval); } else if (SCBP(rqpkt)->sts_chk) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "Check Condition on REQUEST SENSE\n"); return (rval); } /* was there enough data? */ amt = (int)SENSE_LENGTH - rqpkt->pkt_resid; if ((rqpkt->pkt_state & STATE_XFERRED_DATA) == 0 || (amt < SUN_MIN_SENSE_LENGTH)) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "REQUEST SENSE couldn't get sense data\n"); return (rval); } return (st_decode_sense(un, bp, amt, SCBP(rqpkt))); } static int st_handle_autosense(struct scsi_tape *un, struct buf *bp) { struct scsi_pkt *pkt = BP_PKT(bp); struct scsi_arq_status *arqstat = (struct scsi_arq_status *)pkt->pkt_scbp; int rval = COMMAND_DONE_ERROR; int amt; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_autosense()\n"); if (arqstat->sts_rqpkt_status.sts_busy) { ST_DEBUG4(ST_DEVINFO, st_label, CE_WARN, "busy unit on request sense\n"); /* * we return QUE_SENSE so st_intr will setup the SENSE cmd. * the disadvantage is that we do not have any delay for the * second retry of rqsense and we have to keep a packet around */ return (QUE_SENSE); } else if (arqstat->sts_rqpkt_reason != CMD_CMPLT) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "transport error on REQUEST SENSE\n"); if ((arqstat->sts_rqpkt_state & STATE_GOT_TARGET) && ((arqstat->sts_rqpkt_statistics & (STAT_BUS_RESET | STAT_DEV_RESET | STAT_ABORTED)) == 0)) { mutex_exit(ST_MUTEX); if (scsi_reset(ROUTE, RESET_TARGET) == 0) { /* * if target reset fails, then pull the chain */ if (scsi_reset(ROUTE, RESET_ALL) == 0) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "recovery by resets failed\n"); } } mutex_enter(ST_MUTEX); } return (rval); } else if (arqstat->sts_rqpkt_status.sts_chk) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "Check Condition on REQUEST SENSE\n"); return (rval); } /* was there enough data? */ amt = (int)SENSE_LENGTH - arqstat->sts_rqpkt_resid; if ((arqstat->sts_rqpkt_state & STATE_XFERRED_DATA) == 0 || (amt < SUN_MIN_SENSE_LENGTH)) { ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "REQUEST SENSE couldn't get sense data\n"); return (rval); } bcopy(&arqstat->sts_sensedata, ST_RQSENSE, SENSE_LENGTH); return (st_decode_sense(un, bp, amt, &arqstat->sts_rqpkt_status)); } static int st_decode_sense(struct scsi_tape *un, struct buf *bp, int amt, struct scsi_status *statusp) { struct scsi_pkt *pkt = BP_PKT(bp); int rval = COMMAND_DONE_ERROR; long resid; struct scsi_extended_sense *sensep = ST_RQSENSE; int severity; int get_error; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_decode_sense()\n"); /* * For uscsi commands, squirrel away a copy of the * results of the Request Sense. */ if (USCSI_CMD(bp)) { struct uscsi_cmd *ucmd = BP_UCMD(bp); ucmd->uscsi_rqstatus = *(uchar_t *)statusp; if (ucmd->uscsi_rqlen && un->un_srqbufp) { uchar_t rqlen = min((uchar_t)amt, ucmd->uscsi_rqlen); ucmd->uscsi_rqresid = ucmd->uscsi_rqlen - rqlen; bcopy(ST_RQSENSE, un->un_srqbufp, rqlen); ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "st_decode_sense: stat=0x%x resid=0x%x\n", ucmd->uscsi_rqstatus, ucmd->uscsi_rqresid); } } /* * If the drive is an MT-02, reposition the * secondary error code into the proper place. * * XXX MT-02 is non-CCS tape, so secondary error code * is in byte 8. However, in SCSI-2, tape has CCS definition * so it's in byte 12. */ if (un->un_dp->type == ST_TYPE_EMULEX) { sensep->es_code = sensep->es_add_info[0]; } /* for normal I/O check extract the resid values. */ if (bp != un->un_sbufp) { if (sensep->es_valid) { resid = (sensep->es_info_1 << 24) | (sensep->es_info_2 << 16) | (sensep->es_info_3 << 8) | (sensep->es_info_4); if (un->un_bsize) { resid *= un->un_bsize; } } else if (pkt->pkt_state & STATE_XFERRED_DATA) { resid = pkt->pkt_resid; } else { resid = bp->b_bcount; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_sense (rw): xferred bit = %d, resid=%ld (%d), " "pkt_resid=%ld\n", pkt->pkt_state & STATE_XFERRED_DATA, resid, (sensep->es_info_1 << 24) | (sensep->es_info_2 << 16) | (sensep->es_info_3 << 8) | (sensep->es_info_4), pkt->pkt_resid); /* * The problem is, what should we believe? */ if (resid && (pkt->pkt_resid == 0)) { pkt->pkt_resid = resid; } } else { /* * If the command is SCMD_SPACE, we need to get the * residual as returned in the sense data, to adjust * our idea of current tape position correctly */ if ((CDBP(pkt)->scc_cmd == SCMD_SPACE || CDBP(pkt)->scc_cmd == SCMD_WRITE_FILE_MARK) && (sensep->es_valid)) { resid = (sensep->es_info_1 << 24) | (sensep->es_info_2 << 16) | (sensep->es_info_3 << 8) | (sensep->es_info_4); bp->b_resid = resid; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_sense(other): resid=%ld\n", resid); } else { /* * If the special command is SCMD_READ, * the correct resid will be set later. */ resid = bp->b_bcount; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_sense(special read): resid=%ld\n", resid); } } if ((un->un_state >= ST_STATE_OPEN) && (DEBUGGING || st_error_level == SCSI_ERR_ALL)) { st_clean_print(ST_DEVINFO, st_label, CE_NOTE, "Failed CDB", (char *)pkt->pkt_cdbp, CDB_SIZE); st_clean_print(ST_DEVINFO, st_label, CE_CONT, "sense data", (char *)sensep, amt); scsi_log(ST_DEVINFO, st_label, CE_CONT, "count 0x%lx resid 0x%lx pktresid 0x%lx\n", bp->b_bcount, resid, pkt->pkt_resid); } switch (un->un_status = sensep->es_key) { case KEY_NO_SENSE: severity = SCSI_ERR_INFO; /* * Erase, locate or rewind operation in progress, retry * ASC ASCQ * 00 18 Erase operation in progress * 00 19 Locate operation in progress * 00 1A Rewind operation in progress */ if (sensep->es_add_code == 0 && ((sensep->es_qual_code == 0x18) || (sensep->es_qual_code == 0x19) || (sensep->es_qual_code == 0x1a))) { rval = QUE_COMMAND; break; } goto common; case KEY_RECOVERABLE_ERROR: severity = SCSI_ERR_RECOVERED; if ((sensep->es_class == CLASS_EXTENDED_SENSE) && (sensep->es_code == ST_DEFERRED_ERROR)) { if (un->un_dp->options & ST_RETRY_ON_RECOVERED_DEFERRED_ERROR) { rval = QUE_LAST_COMMAND; scsi_errmsg(ST_SCSI_DEVP, pkt, st_label, severity, un->un_blkno, un->un_err_blkno, scsi_cmds, sensep); scsi_log(ST_DEVINFO, st_label, CE_CONT, "Command will be retried\n"); } else { severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR_RECOVERED; ST_DO_ERRSTATS(un, st_softerrs); scsi_errmsg(ST_SCSI_DEVP, pkt, st_label, severity, un->un_blkno, un->un_err_blkno, scsi_cmds, sensep); } break; } common: /* * XXX only want reads to be stopped by filemarks. * Don't want them to be stopped by EOT. EOT matters * only on write. */ if (sensep->es_filmk && !sensep->es_eom) { rval = COMMAND_DONE; } else if (sensep->es_eom) { rval = COMMAND_DONE; } else if (sensep->es_ili) { /* * Fun with variable length record devices: * for specifying larger blocks sizes than the * actual physical record size. */ if (un->un_bsize == 0 && resid > 0) { /* * XXX! Ugly. * The requested blocksize is > tape blocksize, * so this is ok, so we just return the * actual size xferred. */ pkt->pkt_resid = resid; rval = COMMAND_DONE; } else if (un->un_bsize == 0 && resid < 0) { /* * The requested blocksize is < tape blocksize, * so this is not ok, so we err with ENOMEM */ rval = COMMAND_DONE_ERROR_RECOVERED; st_bioerror(bp, ENOMEM); } else { ST_DO_ERRSTATS(un, st_softerrs); severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR; st_bioerror(bp, EINVAL); } } else { /* * we hope and pray for this just being * something we can ignore (ie. a * truly recoverable soft error) */ rval = COMMAND_DONE; } if (sensep->es_filmk) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "filemark\n"); un->un_status = SUN_KEY_EOF; un->un_eof = ST_EOF_PENDING; SET_PE_FLAG(un); } /* * ignore eom when reading, a fmk should terminate reading */ if ((sensep->es_eom) && (CDBP(pkt)->scc_cmd != SCMD_READ)) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "eom\n"); un->un_status = SUN_KEY_EOT; un->un_eof = ST_EOM; SET_PE_FLAG(un); } break; case KEY_ILLEGAL_REQUEST: if (un->un_laststate >= ST_STATE_OPEN) { ST_DO_ERRSTATS(un, st_softerrs); severity = SCSI_ERR_FATAL; } else { severity = SCSI_ERR_INFO; } break; case KEY_MEDIUM_ERROR: ST_DO_ERRSTATS(un, st_harderrs); severity = SCSI_ERR_FATAL; /* * for (buffered) writes, a medium error must be fatal */ if (CDBP(pkt)->scc_cmd != SCMD_WRITE) { rval = COMMAND_DONE_ERROR_RECOVERED; } check_keys: /* * attempt to process the keys in the presence of * other errors */ if (sensep->es_ili && rval != COMMAND_DONE_ERROR) { /* * Fun with variable length record devices: * for specifying larger blocks sizes than the * actual physical record size. */ if (un->un_bsize == 0 && resid > 0) { /* * XXX! Ugly */ pkt->pkt_resid = resid; } else if (un->un_bsize == 0 && resid < 0) { st_bioerror(bp, EINVAL); } else { severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR; st_bioerror(bp, EINVAL); } } if (sensep->es_filmk) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "filemark\n"); un->un_status = SUN_KEY_EOF; un->un_eof = ST_EOF_PENDING; SET_PE_FLAG(un); } /* * ignore eom when reading, a fmk should terminate reading */ if ((sensep->es_eom) && (CDBP(pkt)->scc_cmd != SCMD_READ)) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "eom\n"); un->un_status = SUN_KEY_EOT; un->un_eof = ST_EOM; SET_PE_FLAG(un); } break; case KEY_VOLUME_OVERFLOW: ST_DO_ERRSTATS(un, st_softerrs); un->un_eof = ST_EOM; severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR; goto check_keys; case KEY_HARDWARE_ERROR: ST_DO_ERRSTATS(un, st_harderrs); severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR; if (un->un_dp->options & ST_EJECT_ON_CHANGER_FAILURE) un->un_eject_tape_on_failure = st_check_asc_ascq(un); break; case KEY_BLANK_CHECK: ST_DO_ERRSTATS(un, st_softerrs); severity = SCSI_ERR_INFO; /* * if not a special request and some data was xferred then it * it is not an error yet */ if (bp != un->un_sbufp && (bp->b_flags & B_READ)) { /* * no error for read with or without data xferred */ un->un_status = SUN_KEY_EOT; un->un_eof = ST_EOT; rval = COMMAND_DONE_ERROR; SET_PE_FLAG(un); goto check_keys; } else if (bp != un->un_sbufp && (pkt->pkt_state & STATE_XFERRED_DATA)) { rval = COMMAND_DONE; } else { rval = COMMAND_DONE_ERROR_RECOVERED; } if (un->un_laststate >= ST_STATE_OPEN) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "blank check\n"); un->un_eof = ST_EOM; } if ((CDBP(pkt)->scc_cmd == SCMD_SPACE) && (un->un_dp->options & ST_KNOWS_EOD) && (severity = SCSI_ERR_INFO)) { /* * we were doing a fast forward by skipping * multiple fmk at the time */ st_bioerror(bp, EIO); severity = SCSI_ERR_RECOVERED; rval = COMMAND_DONE; } SET_PE_FLAG(un); goto check_keys; case KEY_WRITE_PROTECT: if (st_wrongtapetype(un)) { un->un_status = SUN_KEY_WRONGMEDIA; ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "wrong tape for writing- use DC6150 tape (or equivalent)\n"); severity = SCSI_ERR_UNKNOWN; } else { severity = SCSI_ERR_FATAL; } ST_DO_ERRSTATS(un, st_harderrs); rval = COMMAND_DONE_ERROR; st_bioerror(bp, EACCES); break; case KEY_UNIT_ATTENTION: ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "KEY_UNIT_ATTENTION : un_state = %d\n", un->un_state); /* * If we have detected a Bus Reset and the tape * drive has been reserved. */ if (ST_RQSENSE->es_add_code == 0x29 && (un->un_rsvd_status & ST_RESERVE)) { un->un_rsvd_status |= ST_LOST_RESERVE; ST_DEBUG(ST_DEVINFO, st_label, CE_WARN, "st_decode_sense: Lost Reservation\n"); } if (un->un_state <= ST_STATE_OPENING) { /* * Look, the tape isn't open yet, now determine * if the cause is a BUS RESET, Save the file and * Block positions for the callers to recover from * the loss of position. */ if ((un->un_fileno >= 0) && (un->un_fileno || un->un_blkno)) { if (ST_RQSENSE->es_add_code == 0x29) { un->un_save_fileno = un->un_fileno; un->un_save_blkno = un->un_blkno; un->un_restore_pos = 1; } } if ((int)un->un_retry_ct++ < st_retry_count) { rval = QUE_COMMAND; } else { rval = COMMAND_DONE_ERROR; } severity = SCSI_ERR_INFO; } else { /* * Check if it is an Unexpected Unit Attention. * If state is >= ST_STATE_OPEN, we have * already done the initialization . * In this case it is Fatal Error * since no further reading/writing * can be done with fileno set to < 0. */ if (un->un_state >= ST_STATE_OPEN) { ST_DO_ERRSTATS(un, st_harderrs); severity = SCSI_ERR_FATAL; } else { severity = SCSI_ERR_INFO; } rval = COMMAND_DONE_ERROR; } un->un_fileno = -1; break; case KEY_NOT_READY: /* * If in process of getting ready retry. */ if (sensep->es_add_code == 0x04 && sensep->es_qual_code == 0x01 && un->un_retry_ct++ < st_retry_count) { rval = QUE_COMMAND; severity = SCSI_ERR_INFO; } else { /* give up */ rval = COMMAND_DONE_ERROR; severity = SCSI_ERR_FATAL; } /* * If this was an error and after device opened * do error stats. */ if (rval == COMMAND_DONE_ERROR && un->un_state > ST_STATE_OPENING) { ST_DO_ERRSTATS(un, st_harderrs); } if (ST_RQSENSE->es_add_code == 0x3a) { if (st_error_level >= SCSI_ERR_FATAL) scsi_log(ST_DEVINFO, st_label, CE_NOTE, "Tape not inserted in drive\n"); un->un_mediastate = MTIO_EJECTED; cv_broadcast(&un->un_state_cv); } if ((un->un_dp->options & ST_EJECT_ON_CHANGER_FAILURE) && (rval != QUE_COMMAND)) un->un_eject_tape_on_failure = st_check_asc_ascq(un); break; case KEY_ABORTED_COMMAND: /* * Probably a parity error... * if we retry here then this may cause data to be * written twice or data skipped during reading */ ST_DO_ERRSTATS(un, st_harderrs); severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR; goto check_keys; default: /* * Undecoded sense key. Try retries and hope * that will fix the problem. Otherwise, we're * dead. */ ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "Unhandled Sense Key '%s'\n", sense_keys[un->un_status]); ST_DO_ERRSTATS(un, st_harderrs); severity = SCSI_ERR_FATAL; rval = COMMAND_DONE_ERROR; goto check_keys; } if ((!(pkt->pkt_flags & FLAG_SILENT) && un->un_state >= ST_STATE_OPEN) && (DEBUGGING || (un->un_laststate > ST_STATE_OPENING) && (severity >= st_error_level))) { scsi_errmsg(ST_SCSI_DEVP, pkt, st_label, severity, un->un_blkno, un->un_err_blkno, scsi_cmds, sensep); if (sensep->es_filmk) { scsi_log(ST_DEVINFO, st_label, CE_CONT, "File Mark Detected\n"); } if (sensep->es_eom) { scsi_log(ST_DEVINFO, st_label, CE_CONT, "End-of-Media Detected\n"); } if (sensep->es_ili) { scsi_log(ST_DEVINFO, st_label, CE_CONT, "Incorrect Length Indicator Set\n"); } } get_error = geterror(bp); if (((rval == COMMAND_DONE_ERROR) || (rval == COMMAND_DONE_ERROR_RECOVERED)) && ((get_error == EIO) || (get_error == 0))) { un->un_rqs_state |= (ST_RQS_ERROR | ST_RQS_VALID); bcopy(ST_RQSENSE, un->un_uscsi_rqs_buf, SENSE_LENGTH); if (un->un_rqs_state & ST_RQS_READ) { un->un_rqs_state &= ~(ST_RQS_READ); } else { un->un_rqs_state |= ST_RQS_OVR; } } return (rval); } static int st_handle_intr_retry_lcmd(struct scsi_tape *un, struct buf *bp) { int status = TRAN_ACCEPT; mutex_enter(ST_MUTEX); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_handle_intr_rtr_lcmd(), un = 0x%p\n", (void *)un); /* * Check to see if we hit the retry timeout. We check to make sure * this is the first one on the runq and make sure we have not * queued up any more, so this one has to be the last on the list * also. If it is not, we have to fail. If it is not the first, but * is the last we are in trouble anyway, as we are in the interrupt * context here. */ if (((int)un->un_retry_ct > st_retry_count) || ((un->un_runqf != bp) && (un->un_runql != bp))) { goto exit; } if (un->un_throttle) { un->un_last_throttle = un->un_throttle; un->un_throttle = 0; } /* * Here we know : bp is the first and last one on the runq * it is not necessary to put it back on the head of the * waitq and then move from waitq to runq. Save this queuing * and call scsi_transport. */ mutex_exit(ST_MUTEX); status = scsi_transport(BP_PKT(bp)); mutex_enter(ST_MUTEX); if (status == TRAN_ACCEPT) { un->un_tran_retry_ct = 0; if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } mutex_exit(ST_MUTEX); ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "restart transport \n"); return (0); } ST_DO_KSTATS(bp, kstat_runq_back_to_waitq); mutex_exit(ST_MUTEX); if (status == TRAN_BUSY) { if (st_handle_intr_busy(un, bp, ST_TRAN_BUSY_TIMEOUT) == 0) return (0); } ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "restart transport rejected\n"); mutex_enter(ST_MUTEX); ST_DO_ERRSTATS(un, st_transerrs); if (un->un_last_throttle) { un->un_throttle = un->un_last_throttle; } exit: mutex_exit(ST_MUTEX); return (-1); } static int st_wrongtapetype(struct scsi_tape *un) { ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_wrongtapetype()\n"); /* * Hack to handle 600A, 600XTD, 6150 && 660 vs. 300XL tapes... */ if (un->un_dp && (un->un_dp->options & ST_QIC) && un->un_mspl) { switch (un->un_dp->type) { case ST_TYPE_WANGTEK: case ST_TYPE_ARCHIVE: /* * If this really worked, we could go off of * the density codes set in the modesense * page. For this drive, 0x10 == QIC-120, * 0xf == QIC-150, and 0x5 should be for * both QIC-24 and, maybe, QIC-11. However, * the h/w doesn't do what the manual says * that it should, so we'll key off of * getting a WRITE PROTECT error AND wp *not* * set in the mode sense information. */ /* * XXX but we already know that status is * write protect, so don't check it again. */ if (un->un_status == KEY_WRITE_PROTECT && un->un_mspl->wp == 0) { return (1); } break; default: break; } } return (0); } static int st_check_error(struct scsi_tape *un, struct scsi_pkt *pkt) { int action; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_check_error()\n"); if (SCBP_C(pkt) == STATUS_RESERVATION_CONFLICT) { action = COMMAND_DONE_EACCES; un->un_rsvd_status |= ST_RESERVATION_CONFLICT; } else if (SCBP(pkt)->sts_busy) { ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "unit busy\n"); if ((int)un->un_retry_ct++ < st_retry_count) { action = QUE_BUSY_COMMAND; } else if ((un->un_rsvd_status & (ST_RESERVE | ST_APPLICATION_RESERVATIONS)) == 0) { /* * If this is a command done before reserve is done * don't reset. */ action = COMMAND_DONE_ERROR; } else { ST_DEBUG2(ST_DEVINFO, st_label, CE_WARN, "unit busy too long\n"); mutex_exit(ST_MUTEX); if (scsi_reset(ROUTE, RESET_TARGET) == 0) { (void) scsi_reset(ROUTE, RESET_ALL); } mutex_enter(ST_MUTEX); action = COMMAND_DONE_ERROR; } } else if (SCBP(pkt)->sts_chk) { /* * we should only get here if the auto rqsense failed * thru a uscsi cmd without autorequest sense * so we just try again */ action = QUE_SENSE; } else { action = COMMAND_DONE; } return (action); } static void st_calc_bnum(struct scsi_tape *un, struct buf *bp) { int n; ASSERT(mutex_owned(ST_MUTEX)); if (un->un_bsize == 0) { n = ((bp->b_bcount - bp->b_resid == 0) ? 0 : 1); un->un_kbytes_xferred += (bp->b_bcount - bp->b_resid)/1000; } else { n = ((bp->b_bcount - bp->b_resid) / un->un_bsize); } un->un_blkno += n; } static void st_set_state(struct scsi_tape *un) { struct buf *bp = un->un_runqf; struct scsi_pkt *sp = BP_PKT(bp); struct uscsi_cmd *ucmd; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_set_state(): un_eof=%x fmneeded=%x pkt_resid=0x%lx (%ld)\n", un->un_eof, un->un_fmneeded, sp->pkt_resid, sp->pkt_resid); if (bp != un->un_sbufp) { #ifdef STDEBUG if (DEBUGGING && sp->pkt_resid) { ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "pkt_resid %ld bcount %ld\n", sp->pkt_resid, bp->b_bcount); } #endif bp->b_resid = sp->pkt_resid; st_calc_bnum(un, bp); if (bp->b_flags & B_READ) { un->un_lastop = ST_OP_READ; un->un_fmneeded = 0; } else { un->un_lastop = ST_OP_WRITE; if (un->un_dp->options & ST_REEL) { un->un_fmneeded = 2; } else { un->un_fmneeded = 1; } } /* * all is honky dory at this point, so let's * readjust the throttle, to increase speed, if we * have not throttled down. */ if (un->un_throttle) un->un_throttle = un->un_max_throttle; } else { char saved_lastop = un->un_lastop; uchar_t cmd = (uchar_t)(intptr_t)bp->b_forw; un->un_lastop = ST_OP_CTL; switch (cmd) { case SCMD_WRITE: bp->b_resid = sp->pkt_resid; un->un_lastop = ST_OP_WRITE; st_calc_bnum(un, bp); if (un->un_dp->options & ST_REEL) { un->un_fmneeded = 2; } else { un->un_fmneeded = 1; } break; case SCMD_READ: bp->b_resid = sp->pkt_resid; un->un_lastop = ST_OP_READ; st_calc_bnum(un, bp); un->un_fmneeded = 0; break; case SCMD_WRITE_FILE_MARK: if (un->un_eof != ST_EOM) un->un_eof = ST_NO_EOF; un->un_lastop = ST_OP_WEOF; un->un_fileno += (bp->b_bcount - bp->b_resid); un->un_blkno = 0; if (un->un_dp->options & ST_REEL) { un->un_fmneeded -= (bp->b_bcount - bp->b_resid); if (un->un_fmneeded < 0) { un->un_fmneeded = 0; } } else { un->un_fmneeded = 0; } break; case SCMD_REWIND: un->un_eof = ST_NO_EOF; un->un_fileno = 0; un->un_blkno = 0; break; case SCMD_SPACE: { int space_fmk, count; long resid; count = (int)space_cnt(bp->b_bcount); resid = (long)space_cnt(bp->b_resid); space_fmk = ((bp->b_bcount) & (1<<24)) ? 1 : 0; if (count >= 0) { if (space_fmk) { if (un->un_eof <= ST_EOF) { un->un_eof = ST_NO_EOF; } un->un_fileno += (count - resid); un->un_blkno = 0; } else { un->un_blkno += count - resid; } } else if (count < 0) { if (space_fmk) { un->un_fileno -= ((-count) - resid); if (un->un_fileno < 0) { un->un_fileno = 0; un->un_blkno = 0; } else { un->un_blkno = INF; } } else { if (un->un_eof >= ST_EOF_PENDING) { /* * we stepped back into * a previous file; we are not * making an effort to pretend that * we are still in the current file * ie. logical == physical position * and leave it to st_ioctl to correct */ if (un->un_fileno > 0) { un->un_fileno--; un->un_blkno = INF; } else { un->un_blkno = 0; } } else { un->un_blkno -= (-count) - resid; } } } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "aft_space rs %ld fil %d blk %ld\n", resid, un->un_fileno, un->un_blkno); break; } case SCMD_LOAD: if (bp->b_bcount & 0x1) { un->un_fileno = 0; } else { un->un_state = ST_STATE_OFFLINE; un->un_fileno = -1; } un->un_density_known = 0; un->un_eof = ST_NO_EOF; un->un_blkno = 0; break; case SCMD_ERASE: un->un_eof = ST_NO_EOF; un->un_blkno = 0; un->un_fileno = 0; break; case SCMD_RESERVE: un->un_rsvd_status |= ST_RESERVE; un->un_rsvd_status &= ~(ST_RELEASE | ST_LOST_RESERVE | ST_RESERVATION_CONFLICT); un->un_lastop = saved_lastop; break; case SCMD_RELEASE: un->un_rsvd_status |= ST_RELEASE; un->un_rsvd_status &= ~(ST_RESERVE | ST_LOST_RESERVE | ST_RESERVATION_CONFLICT); un->un_lastop = saved_lastop; break; case SCMD_PERSISTENT_RESERVE_IN: ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "PGR_IN command\n"); break; case SCMD_PERSISTENT_RESERVE_OUT: switch (sp->pkt_cdbp[1] & ST_SA_MASK) { case ST_SA_SCSI3_RESERVE: case ST_SA_SCSI3_PREEMPT: case ST_SA_SCSI3_PREEMPTANDABORT: un->un_rsvd_status |= ST_APPLICATION_RESERVATIONS; ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "PGR Reserve and set: entering" " ST_APPLICATION_RESERVATIONS mode"); break; case ST_SA_SCSI3_RELEASE: case ST_SA_SCSI3_CLEAR: un->un_rsvd_status &= ~ST_APPLICATION_RESERVATIONS; ST_DEBUG6(ST_DEVINFO, st_label, CE_WARN, "PGR Release and reset: exiting" " ST_APPLICATION_RESERVATIONS mode"); break; } break; case SCMD_TEST_UNIT_READY: case SCMD_READ_BLKLIM: case SCMD_REQUEST_SENSE: case SCMD_INQUIRY: case SCMD_RECOVER_BUF: case SCMD_MODE_SELECT: case SCMD_MODE_SENSE: case SCMD_DOORLOCK: case SCMD_READ_POSITION: case SCMD_READ_BUFFER: case SCMD_REPORT_DENSITIES: case SCMD_LOG_SELECT_G1: case SCMD_LOG_SENSE_G1: case SCMD_REPORT_LUNS: case SCMD_READ_ATTRIBUTE: un->un_lastop = saved_lastop; break; case SCMD_LOCATE: /* Locate makes position unknown */ default: /* * Unknown command, If was USCSI and USCSI_SILENT * flag was not set, set position to unknown. */ if ((((ucmd = BP_UCMD(bp)) != NULL) && (ucmd->uscsi_flags & USCSI_SILENT) == 0)) { ST_DEBUG2(ST_DEVINFO, st_label, CE_WARN, "unknown cmd 0x%X caused loss of state\n", cmd); } else { break; } /* FALLTHROUGH */ case SCMD_WRITE_BUFFER: /* Writes new firmware to device */ un->un_fileno = -1; break; } } /* * In the st driver we have a logical and physical file position. * Under BSD behavior, when you get a zero read, the logical position * is before the filemark but after the last record of the file. * The physical position is after the filemark. MTIOCGET should always * return the logical file position. * * The next read gives a silent skip to the next file. * Under SVR4, the logical file position remains before the filemark * until the file is closed or a space operation is performed. * Hence set err_resid and err_file before changing fileno if case * BSD Behaviour. */ un->un_err_resid = bp->b_resid; un->un_err_fileno = un->un_fileno; un->un_err_blkno = un->un_blkno; un->un_retry_ct = 0; /* * If we've seen a filemark via the last read operation * advance the file counter, but mark things such that * the next read operation gets a zero count. We have * to put this here to handle the case of sitting right * at the end of a tape file having seen the file mark, * but the tape is closed and then re-opened without * any further i/o. That is, the position information * must be updated before a close. */ if (un->un_lastop == ST_OP_READ && un->un_eof == ST_EOF_PENDING) { /* * If we're a 1/2" tape, and we get a filemark * right on block 0, *AND* we were not in the * first file on the tape, and we've hit logical EOM. * We'll mark the state so that later we do the * right thing (in st_close(), st_strategy() or * st_ioctl()). * */ if ((un->un_dp->options & ST_REEL) && !(un->un_dp->options & ST_READ_IGNORE_EOFS) && un->un_blkno == 0 && un->un_fileno > 0) { un->un_eof = ST_EOT_PENDING; ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "eot pending\n"); un->un_fileno++; un->un_blkno = 0; } else if (BSD_BEHAVIOR) { /* * If the read of the filemark was a side effect * of reading some blocks (i.e., data was actually * read), then the EOF mark is pending and the * bump into the next file awaits the next read * operation (which will return a zero count), or * a close or a space operation, else the bump * into the next file occurs now. */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "resid=%lx, bcount=%lx\n", bp->b_resid, bp->b_bcount); if (bp->b_resid != bp->b_bcount) { un->un_eof = ST_EOF; } else { un->un_silent_skip = 1; un->un_eof = ST_NO_EOF; un->un_fileno++; un->un_save_blkno = un->un_blkno; un->un_blkno = 0; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "eof of file %d, un_eof=%d\n", un->un_fileno, un->un_eof); } else if (SVR4_BEHAVIOR) { /* * If the read of the filemark was a side effect * of reading some blocks (i.e., data was actually * read), then the next read should return 0 */ ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "resid=%lx, bcount=%lx\n", bp->b_resid, bp->b_bcount); if (bp->b_resid == bp->b_bcount) { un->un_eof = ST_EOF; } ST_DEBUG6(ST_DEVINFO, st_label, SCSI_DEBUG, "eof of file=%d, un_eof=%d\n", un->un_fileno, un->un_eof); } } } /* * set the correct un_errno, to take corner cases into consideration */ static void st_set_pe_errno(struct scsi_tape *un) { ASSERT(mutex_owned(ST_MUTEX)); /* if errno is already set, don't reset it */ if (un->un_errno) return; /* here un_errno == 0 */ /* * if the last transfer before flushing all the * waiting I/O's, was 0 (resid = count), then we * want to give the user an error on all the rest, * so here. If there was a transfer, we set the * resid and counts to 0, and let it drop through, * giving a zero return. the next I/O will then * give an error. */ if (un->un_last_resid == un->un_last_count) { switch (un->un_eof) { case ST_EOM: un->un_errno = ENOMEM; break; case ST_EOT: case ST_EOF: un->un_errno = EIO; break; } } else { /* * we know they did not have a zero, so make * sure they get one */ un->un_last_resid = un->un_last_count = 0; } } /* * send in a marker pkt to terminate flushing of commands by BBA (via * flush-on-errors) property. The HBA will always return TRAN_ACCEPT */ static void st_hba_unflush(struct scsi_tape *un) { ASSERT(mutex_owned(ST_MUTEX)); if (!un->un_flush_on_errors) return; #ifdef FLUSH_ON_ERRORS if (!un->un_mkr_pkt) { un->un_mkr_pkt = scsi_init_pkt(ROUTE, NULL, (struct buf *)NULL, NULL, 0, 0, 0, SLEEP_FUNC, NULL); /* we slept, so it must be there */ pkt->pkt_flags |= FLAG_FLUSH_MARKER; } mutex_exit(ST_MUTEX); scsi_transport(un->un_mkr_pkt); mutex_enter(ST_MUTEX); #endif } static void st_clean_print(dev_info_t *dev, char *label, uint_t level, char *title, char *data, int len) { int i; char buf[256]; (void) sprintf(buf, "%s: ", title); for (i = 0; i < len; i++) { (void) sprintf(&buf[(int)strlen(buf)], "0x%x ", (data[i] & 0xff)); } (void) sprintf(&buf[(int)strlen(buf)], "\n"); scsi_log(dev, label, level, "%s", buf); } /* * Conditionally enabled debugging */ #ifdef STDEBUG static void st_debug_cmds(struct scsi_tape *un, int com, int count, int wait) { char tmpbuf[64]; ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "cmd=%s count=0x%x (%d) %ssync\n", scsi_cmd_name(com, scsi_cmds, tmpbuf), count, count, wait == ASYNC_CMD ? "a" : ""); } /* * Returns pointer to name of minor node name of device 'dev'. */ static char * st_dev_name(dev_t dev) { const char density[] = { 'l', 'm', 'h', 'c' }; static char name[4]; minor_t minor; int nprt = 0; minor = getminor(dev); name[nprt] = density[(minor & MT_DENSITY_MASK) >> 3]; if (minor & MT_BSD) { name[++nprt] = 'b'; } if (minor & MT_NOREWIND) { name[++nprt] = 'n'; } /* NULL terminator */ name[++nprt] = 0; return (name); } #endif /* STDEBUG */ /* * Soft error reporting, so far unique to each drive * * Currently supported: exabyte and DAT soft error reporting */ static int st_report_exabyte_soft_errors(dev_t dev, int flag) { uchar_t *sensep; int amt; int rval = 0; char cdb[CDB_GROUP0], *c = cdb; struct uscsi_cmd *com; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_report_exabyte_soft_errors(dev = 0x%lx, flag = %d)\n", dev, flag); ASSERT(mutex_owned(ST_MUTEX)); com = kmem_zalloc(sizeof (*com), KM_SLEEP); sensep = kmem_zalloc(TAPE_SENSE_LENGTH, KM_SLEEP); *c++ = SCMD_REQUEST_SENSE; *c++ = 0; *c++ = 0; *c++ = 0; *c++ = TAPE_SENSE_LENGTH; /* * set CLRCNT (byte 5, bit 7 which clears the error counts) */ *c = (char)0x80; com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP0; com->uscsi_bufaddr = (caddr_t)sensep; com->uscsi_buflen = TAPE_SENSE_LENGTH; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; com->uscsi_timeout = un->un_dp->non_motion_timeout; rval = st_ioctl_cmd(dev, com, FKIOCTL); if (rval || com->uscsi_status) { goto done; } /* * was there enough data? */ amt = (int)TAPE_SENSE_LENGTH - com->uscsi_resid; if ((amt >= 19) && un->un_kbytes_xferred) { uint_t count, error_rate; uint_t rate; if (sensep[21] & CLN) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Periodic head cleaning required"); } if (un->un_kbytes_xferred < (EXABYTE_MIN_TRANSFER/1000)) goto done; /* * check if soft error reporting needs to be done. */ count = sensep[16] << 16 | sensep[17] << 8 | sensep[18]; count &= 0xffffff; error_rate = (count * 100)/un->un_kbytes_xferred; #ifdef STDEBUG if (st_soft_error_report_debug) { scsi_log(ST_DEVINFO, st_label, CE_NOTE, "Exabyte Soft Error Report:\n"); scsi_log(ST_DEVINFO, st_label, CE_CONT, "read/write error counter: %d\n", count); scsi_log(ST_DEVINFO, st_label, CE_CONT, "number of bytes transferred: %dK\n", un->un_kbytes_xferred); scsi_log(ST_DEVINFO, st_label, CE_CONT, "error_rate: %d%%\n", error_rate); if (amt >= 22) { scsi_log(ST_DEVINFO, st_label, CE_CONT, "unit sense: 0x%b 0x%b 0x%b\n", sensep[19], SENSE_19_BITS, sensep[20], SENSE_20_BITS, sensep[21], SENSE_21_BITS); } if (amt >= 27) { scsi_log(ST_DEVINFO, st_label, CE_CONT, "tracking retry counter: %d\n", sensep[26]); scsi_log(ST_DEVINFO, st_label, CE_CONT, "read/write retry counter: %d\n", sensep[27]); } } #endif if (flag & FWRITE) { rate = EXABYTE_WRITE_ERROR_THRESHOLD; } else { rate = EXABYTE_READ_ERROR_THRESHOLD; } if (error_rate >= rate) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Soft error rate (%d%%) during %s was too high", error_rate, ((flag & FWRITE) ? wrg_str : rdg_str)); scsi_log(ST_DEVINFO, st_label, CE_CONT, "Please, replace tape cartridge\n"); } } done: kmem_free(com, sizeof (*com)); kmem_free(sensep, TAPE_SENSE_LENGTH); if (rval != 0) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "exabyte soft error reporting failed\n"); } return (rval); } /* * this is very specific to Archive 4mm dat */ #define ONEGIG (1024 * 1024 * 1024) static int st_report_dat_soft_errors(dev_t dev, int flag) { uchar_t *sensep; int amt, i; int rval = 0; char cdb[CDB_GROUP1], *c = cdb; struct uscsi_cmd *com; GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_report_dat_soft_errors(dev = 0x%lx, flag = %d)\n", dev, flag); ASSERT(mutex_owned(ST_MUTEX)); com = kmem_zalloc(sizeof (*com), KM_SLEEP); sensep = kmem_zalloc(LOG_SENSE_LENGTH, KM_SLEEP); *c++ = SCMD_LOG_SENSE_G1; *c++ = 0; *c++ = (flag & FWRITE) ? 0x42 : 0x43; *c++ = 0; *c++ = 0; *c++ = 0; *c++ = 2; *c++ = 0; *c++ = (char)LOG_SENSE_LENGTH; *c = 0; com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP1; com->uscsi_bufaddr = (caddr_t)sensep; com->uscsi_buflen = LOG_SENSE_LENGTH; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; com->uscsi_timeout = un->un_dp->non_motion_timeout; rval = st_ioctl_cmd(dev, com, FKIOCTL); if (rval) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "DAT soft error reporting failed\n"); } if (rval || com->uscsi_status) { goto done; } /* * was there enough data? */ amt = (int)LOG_SENSE_LENGTH - com->uscsi_resid; if ((amt >= MIN_LOG_SENSE_LENGTH) && un->un_kbytes_xferred) { int total, retries, param_code; total = -1; retries = -1; amt = sensep[3] + 4; #ifdef STDEBUG if (st_soft_error_report_debug) { (void) printf("logsense:"); for (i = 0; i < MIN_LOG_SENSE_LENGTH; i++) { if (i % 16 == 0) { (void) printf("\t\n"); } (void) printf(" %x", sensep[i]); } (void) printf("\n"); } #endif /* * parse the param_codes */ if (sensep[0] == 2 || sensep[0] == 3) { for (i = 4; i < amt; i++) { param_code = (sensep[i++] << 8); param_code += sensep[i++]; i++; /* skip control byte */ if (param_code == 5) { if (sensep[i++] == 4) { total = (sensep[i++] << 24); total += (sensep[i++] << 16); total += (sensep[i++] << 8); total += sensep[i]; } } else if (param_code == 0x8007) { if (sensep[i++] == 2) { retries = sensep[i++] << 8; retries += sensep[i]; } } else { i += sensep[i]; } } } /* * if the log sense returned valid numbers then determine * the read and write error thresholds based on the amount of * data transferred */ if (total > 0 && retries > 0) { short normal_retries = 0; ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "total xferred (%s) =%x, retries=%x\n", ((flag & FWRITE) ? wrg_str : rdg_str), total, retries); if (flag & FWRITE) { if (total <= WRITE_SOFT_ERROR_WARNING_THRESHOLD) { normal_retries = DAT_SMALL_WRITE_ERROR_THRESHOLD; } else { normal_retries = DAT_LARGE_WRITE_ERROR_THRESHOLD; } } else { if (total <= READ_SOFT_ERROR_WARNING_THRESHOLD) { normal_retries = DAT_SMALL_READ_ERROR_THRESHOLD; } else { normal_retries = DAT_LARGE_READ_ERROR_THRESHOLD; } } ST_DEBUG4(ST_DEVINFO, st_label, SCSI_DEBUG, "normal retries=%d\n", normal_retries); if (retries >= normal_retries) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Soft error rate (retries = %d) during " "%s was too high", retries, ((flag & FWRITE) ? wrg_str : rdg_str)); scsi_log(ST_DEVINFO, st_label, CE_CONT, "Periodic head cleaning required " "and/or replace tape cartridge\n"); } } else if (total == -1 || retries == -1) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "log sense parameter code does not make sense\n"); } } /* * reset all values */ c = cdb; *c++ = SCMD_LOG_SELECT_G1; *c++ = 2; /* this resets all values */ *c++ = (char)0xc0; *c++ = 0; *c++ = 0; *c++ = 0; *c++ = 0; *c++ = 0; *c++ = 0; *c = 0; com->uscsi_bufaddr = NULL; com->uscsi_buflen = 0; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT; rval = st_ioctl_cmd(dev, com, FKIOCTL); if (rval) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "DAT soft error reset failed\n"); } done: kmem_free(com, sizeof (*com)); kmem_free(sensep, LOG_SENSE_LENGTH); return (rval); } static int st_report_soft_errors(dev_t dev, int flag) { GET_SOFT_STATE(dev); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_report_soft_errors(dev = 0x%lx, flag = %d)\n", dev, flag); ASSERT(mutex_owned(ST_MUTEX)); switch (un->un_dp->type) { case ST_TYPE_EXB8500: case ST_TYPE_EXABYTE: return (st_report_exabyte_soft_errors(dev, flag)); /*NOTREACHED*/ case ST_TYPE_PYTHON: return (st_report_dat_soft_errors(dev, flag)); /*NOTREACHED*/ default: un->un_dp->options &= ~ST_SOFT_ERROR_REPORTING; return (-1); } } /* * persistent error routines */ /* * enable persistent errors, and set the throttle appropriately, checking * for flush-on-errors capability */ static void st_turn_pe_on(struct scsi_tape *un) { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_pe_on\n"); ASSERT(mutex_owned(ST_MUTEX)); un->un_persistence = 1; /* * only use flush-on-errors if auto-request-sense and untagged-qing are * enabled. This will simplify the error handling for request senses */ if (un->un_arq_enabled && un->un_untagged_qing) { uchar_t f_o_e; mutex_exit(ST_MUTEX); f_o_e = (scsi_ifsetcap(ROUTE, "flush-on-errors", 1, 1) == 1) ? 1 : 0; mutex_enter(ST_MUTEX); un->un_flush_on_errors = f_o_e; } else { un->un_flush_on_errors = 0; } if (un->un_flush_on_errors) un->un_max_throttle = (uchar_t)st_max_throttle; else un->un_max_throttle = 1; if (un->un_dp->options & ST_RETRY_ON_RECOVERED_DEFERRED_ERROR) un->un_max_throttle = 1; /* this will send a marker pkt */ CLEAR_PE(un); } /* * This turns persistent errors permanently off */ static void st_turn_pe_off(struct scsi_tape *un) { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_pe_off\n"); ASSERT(mutex_owned(ST_MUTEX)); /* turn it off for good */ un->un_persistence = 0; /* this will send a marker pkt */ CLEAR_PE(un); /* turn off flush on error capability, if enabled */ if (un->un_flush_on_errors) { mutex_exit(ST_MUTEX); (void) scsi_ifsetcap(ROUTE, "flush-on-errors", 0, 1); mutex_enter(ST_MUTEX); } un->un_flush_on_errors = 0; } /* * This clear persistent errors, allowing more commands through, and also * sending a marker packet. */ static void st_clear_pe(struct scsi_tape *un) { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_pe_clear\n"); ASSERT(mutex_owned(ST_MUTEX)); un->un_persist_errors = 0; un->un_throttle = un->un_last_throttle = 1; un->un_errno = 0; st_hba_unflush(un); } /* * This will flag persistent errors, shutting everything down, if the * application had enabled persistent errors via MTIOCPERSISTENT */ static void st_set_pe_flag(struct scsi_tape *un) { ASSERT(mutex_owned(ST_MUTEX)); if (un->un_persistence) { ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_pe_flag\n"); un->un_persist_errors = 1; un->un_throttle = un->un_last_throttle = 0; } } /* * List of commands that are allowed to be done while another host holds * the reservation. */ struct { uchar_t cmd; uchar_t byte; /* byte to look for data */ uint32_t mask; /* bits that matter in the above data */ } rcmds[] = { { SCMD_TEST_UNIT_READY, 0, 0 }, /* may fail on older drives */ { SCMD_REQUEST_SENSE, 0, 0 }, { SCMD_READ_BLKLIM, 0, 0 }, { SCMD_INQUIRY, 0, 0 }, { SCMD_RESERVE, 0, 0 }, { SCMD_RELEASE, 0, 0 }, { SCMD_DOORLOCK, 4, 3 }, /* allow (unlock) media access only */ { SCMD_REPORT_DENSITIES, 0, 0 }, { SCMD_LOG_SENSE_G1, 0, 0 }, { SCMD_PERSISTENT_RESERVE_IN, 0, 0 }, { SCMD_PERSISTENT_RESERVE_OUT, 0, 0 }, { SCMD_REPORT_LUNS, 0, 0 } }; static int st_do_reserve(struct scsi_tape *un) { int rval; /* * Issue a Throw-Away reserve command to clear the * check condition. * If the current behaviour of reserve/release is to * hold reservation across opens , and if a Bus reset * has been issued between opens then this command * would set the ST_LOST_RESERVE flags in rsvd_status. * In this case return an EACCES so that user knows that * reservation has been lost in between opens. * If this error is not returned and we continue with * successful open , then user may think position of the * tape is still the same but inreality we would rewind the * tape and continue from BOT. */ rval = st_reserve_release(un, ST_RESERVE); if (rval) { if ((un->un_rsvd_status & ST_LOST_RESERVE_BETWEEN_OPENS) == ST_LOST_RESERVE_BETWEEN_OPENS) { un->un_rsvd_status &= ~(ST_LOST_RESERVE | ST_RESERVE); un->un_errno = EACCES; return (EACCES); } rval = st_reserve_release(un, ST_RESERVE); } if (rval == 0) { un->un_rsvd_status |= ST_INIT_RESERVE; } return (rval); } static int st_check_cdb_for_need_to_reserve(struct scsi_tape *un, caddr_t cdb) { int i; int rval = 0; /* * If already reserved no need to do it again. * Also if Reserve and Release are disabled Just return. */ if ((un->un_rsvd_status & (ST_RESERVE | ST_APPLICATION_RESERVATIONS)) || (un->un_dp->options & ST_NO_RESERVE_RELEASE)) { ST_DEBUG6(ST_DEVINFO, st_label, CE_NOTE, "st_check_cdb_for_need_to_reserve() reserve unneeded 0x%x", cdb[0]); return (0); } /* See if command is on the list */ for (i = 0; i < ST_NUM_MEMBERS(rcmds); i++) { if ((uchar_t)cdb[0] == rcmds[i].cmd) { /* * cmd is on list. * if byte is zero always allowed. */ if (rcmds[i].byte == 0) { return (rval); } if (((cdb[rcmds[i].byte]) & (rcmds[i].mask)) == 0) { return (rval); } break; } } ST_DEBUG6(ST_DEVINFO, st_label, CE_NOTE, "Command 0x%x requires reservation", cdb[0]); rval = st_do_reserve(un); return (rval); } static int st_check_cmd_for_need_to_reserve(struct scsi_tape *un, uchar_t cmd, int cnt) { int i; int rval = 0; if ((un->un_rsvd_status & (ST_RESERVE | ST_APPLICATION_RESERVATIONS)) || (un->un_dp->options & ST_NO_RESERVE_RELEASE)) { ST_DEBUG6(ST_DEVINFO, st_label, CE_NOTE, "st_check_cmd_for_need_to_reserve() reserve unneeded 0x%x", cmd); return (0); } /* See if command is on the list */ for (i = 0; i < ST_NUM_MEMBERS(rcmds); i++) { if (cmd == rcmds[i].cmd) { /* * cmd is on list. * if byte is zero always allowed. */ if (rcmds[i].byte == 0) { return (rval); } if (((rcmds[i].mask) & cnt) == 0) { return (rval); } break; } } ST_DEBUG6(ST_DEVINFO, st_label, CE_NOTE, "Cmd 0x%x requires reservation", cmd); rval = st_do_reserve(un); return (rval); } static int st_reserve_release(struct scsi_tape *un, int cmd) { struct uscsi_cmd uscsi_cmd; struct uscsi_cmd *com = &uscsi_cmd; int rval; char cdb[CDB_GROUP0]; ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_reserve_release: %s \n", (cmd == ST_RELEASE)? "Releasing":"Reserving"); bzero(cdb, CDB_GROUP0); if (cmd == ST_RELEASE) { cdb[0] = SCMD_RELEASE; } else { cdb[0] = SCMD_RESERVE; } bzero(com, sizeof (struct uscsi_cmd)); com->uscsi_flags = USCSI_WRITE; com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP0; com->uscsi_timeout = un->un_dp->non_motion_timeout; rval = st_ioctl_cmd(un->un_dev, com, FKIOCTL); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_reserve_release: rval(1)=%d\n", rval); if (rval) { if (com->uscsi_status == STATUS_RESERVATION_CONFLICT) { rval = EACCES; } /* * dynamically turn off reserve/release support * in case of drives which do not support * reserve/release command(ATAPI drives). */ if (un->un_status == KEY_ILLEGAL_REQUEST) { if (un->un_dp->options & ST_NO_RESERVE_RELEASE) { un->un_dp->options |= ST_NO_RESERVE_RELEASE; ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "Tape unit does not support " "reserve/release \n"); } rval = 0; } } return (rval); } static int st_take_ownership(dev_t dev) { int rval; GET_SOFT_STATE(dev); ASSERT(mutex_owned(ST_MUTEX)); ST_DEBUG3(ST_DEVINFO, st_label, SCSI_DEBUG, "st_take_ownership: Entering ...\n"); rval = st_reserve_release(un, ST_RESERVE); /* * XXX -> Should reset be done only if we get EACCES. * . */ if (rval) { mutex_exit(ST_MUTEX); if (scsi_reset(ROUTE, RESET_TARGET) == 0) { if (scsi_reset(ROUTE, RESET_ALL) == 0) { mutex_enter(ST_MUTEX); return (EIO); } } mutex_enter(ST_MUTEX); un->un_rsvd_status &= ~(ST_LOST_RESERVE | ST_RESERVATION_CONFLICT); mutex_exit(ST_MUTEX); delay(drv_usectohz(ST_RESERVATION_DELAY)); mutex_enter(ST_MUTEX); /* * remove the check condition. */ (void) st_reserve_release(un, ST_RESERVE); if ((rval = st_reserve_release(un, ST_RESERVE)) != 0) { if ((st_reserve_release(un, ST_RESERVE)) != 0) { rval = (un->un_rsvd_status & ST_RESERVATION_CONFLICT) ? EACCES : EIO; return (rval); } } /* * Set tape state to ST_STATE_OFFLINE , in case if * the user wants to continue and start using * the tape. */ un->un_state = ST_STATE_OFFLINE; un->un_rsvd_status |= ST_INIT_RESERVE; } return (rval); } static int st_create_errstats(struct scsi_tape *un, int instance) { char kstatname[KSTAT_STRLEN]; /* * Create device error kstats */ if (un->un_errstats == (kstat_t *)0) { (void) sprintf(kstatname, "st%d,err", instance); un->un_errstats = kstat_create("sterr", instance, kstatname, "device_error", KSTAT_TYPE_NAMED, sizeof (struct st_errstats) / sizeof (kstat_named_t), KSTAT_FLAG_PERSISTENT); if (un->un_errstats) { struct st_errstats *stp; stp = (struct st_errstats *)un->un_errstats->ks_data; kstat_named_init(&stp->st_softerrs, "Soft Errors", KSTAT_DATA_ULONG); kstat_named_init(&stp->st_harderrs, "Hard Errors", KSTAT_DATA_ULONG); kstat_named_init(&stp->st_transerrs, "Transport Errors", KSTAT_DATA_ULONG); kstat_named_init(&stp->st_vid, "Vendor", KSTAT_DATA_CHAR); kstat_named_init(&stp->st_pid, "Product", KSTAT_DATA_CHAR); kstat_named_init(&stp->st_revision, "Revision", KSTAT_DATA_CHAR); kstat_named_init(&stp->st_serial, "Serial No", KSTAT_DATA_CHAR); un->un_errstats->ks_private = un; un->un_errstats->ks_update = nulldev; kstat_install(un->un_errstats); /* * Fill in the static data */ (void) strncpy(&stp->st_vid.value.c[0], ST_INQUIRY->inq_vid, 8); /* * XXX: Emulex MT-02 (and emulators) predates * SCSI-1 and has no vid & pid inquiry data. */ if (ST_INQUIRY->inq_len != 0) { (void) strncpy(&stp->st_pid.value.c[0], ST_INQUIRY->inq_pid, 16); (void) strncpy(&stp->st_revision.value.c[0], ST_INQUIRY->inq_revision, 4); (void) strncpy(&stp->st_serial.value.c[0], ST_INQUIRY->inq_serial, 12); } } } return (0); } static int st_validate_tapemarks(struct scsi_tape *un, int fileno, daddr_t blkno) { dev_t dev; int rval; ASSERT(MUTEX_HELD(&un->un_sd->sd_mutex)); ASSERT(mutex_owned(ST_MUTEX)); dev = un->un_dev; scsi_log(ST_DEVINFO, st_label, CE_NOTE, "Restoring tape" " position at fileno=%x, blkno=%lx....", fileno, blkno); /* * Rewind ? Oh yeah, Fidelity has got the STK F/W changed * so as not to rewind tape on RESETS: Gee, Has life ever * been simple in tape land ? */ rval = st_cmd(dev, SCMD_REWIND, 0, SYNC_CMD); if (rval) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Failed to restore the last file and block position: In" " this state, Tape will be loaded at BOT during next open"); un->un_fileno = -1; return (rval); } if (fileno) { rval = st_cmd(dev, SCMD_SPACE, Fmk(fileno), SYNC_CMD); if (rval) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Failed to restore the last file position: In this " " state, Tape will be loaded at BOT during next open"); un->un_fileno = -1; return (rval); } } if (blkno) { rval = st_cmd(dev, SCMD_SPACE, Blk(blkno), SYNC_CMD); if (rval) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Failed to restore the last block position: In this" " state, tape will be loaded at BOT during next open"); un->un_fileno = -1; return (rval); } } return (0); } /* * check sense key, ASC, ASCQ in order to determine if the tape needs * to be ejected */ static int st_check_asc_ascq(struct scsi_tape *un) { struct scsi_extended_sense *sensep = ST_RQSENSE; struct tape_failure_code *code; for (code = st_tape_failure_code; code->key != 0xff; code++) { if ((code->key == sensep->es_key) && (code->add_code == sensep->es_add_code) && (code->qual_code == sensep->es_qual_code)) return (1); } return (0); } /* * st_logpage_supported() sends a Log Sense command with * page code = 0 = Supported Log Pages Page to the device, * to see whether the page 'page' is supported. * Return values are: * -1 if the Log Sense command fails * 0 if page is not supported * 1 if page is supported */ static int st_logpage_supported(dev_t dev, uchar_t page) { uchar_t *sp, *sensep; unsigned length; struct uscsi_cmd *com; int rval; char cdb[CDB_GROUP1] = { SCMD_LOG_SENSE_G1, 0, SUPPORTED_LOG_PAGES_PAGE, 0, 0, 0, 0, 0, (char)LOG_SENSE_LENGTH, 0 }; GET_SOFT_STATE(dev); ASSERT(mutex_owned(ST_MUTEX)); com = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); sensep = kmem_zalloc(LOG_SENSE_LENGTH, KM_SLEEP); com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP1; com->uscsi_bufaddr = (caddr_t)sensep; com->uscsi_buflen = LOG_SENSE_LENGTH; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; com->uscsi_timeout = un->un_dp->non_motion_timeout; rval = st_ioctl_cmd(dev, com, FKIOCTL); if (rval || com->uscsi_status) { /* uscsi-command failed */ rval = -1; } else { sp = sensep + 3; for (length = *sp++; length > 0; length--, sp++) { if (*sp == page) { rval = 1; break; } } } kmem_free(com, sizeof (struct uscsi_cmd)); kmem_free(sensep, LOG_SENSE_LENGTH); return (rval); } /* * st_check_clean_bit() gets the status of the tape's cleaning bit. * * If the device does support the TapeAlert log page, then the cleaning bit * information will be read from this page. Otherwise we will see if one of * ST_CLN_TYPE_1, ST_CLN_TYPE_2 or ST_CLN_TYPE_3 is set in the properties of * the device, which means, that we can get the cleaning bit information via * a RequestSense command. * If both methods of getting cleaning bit information are not supported * st_check_clean_bit() will return with 0. Otherwise st_check_clean_bit() * returns with * - MTF_TAPE_CLN_SUPPORTED if cleaning bit is not set or * - MTF_TAPE_CLN_SUPPORTED | MTF_TAPE_HEAD_DIRTY if cleaning bit is set. * If the call to st_ioctl_cmd() to do the Log Sense or the Request Sense * command fails, or if the amount of Request Sense data is not enough, then * st_check_clean_bit() returns with -1. */ static int st_check_clean_bit(dev_t dev) { int rval = 0; GET_SOFT_STATE(dev); ASSERT(mutex_owned(ST_MUTEX)); if (un->un_HeadClean & TAPE_ALERT_NOT_SUPPORTED) { return (rval); } if (un->un_HeadClean == TAPE_ALERT_SUPPORT_UNKNOWN) { rval = st_logpage_supported(dev, TAPE_SEQUENTIAL_PAGE); if (rval == 1) { un->un_HeadClean |= TAPE_SEQUENTIAL_SUPPORTED; } rval = st_logpage_supported(dev, TAPE_ALERT_PAGE); if (rval == 1) { un->un_HeadClean |= TAPE_ALERT_SUPPORTED; } if (un->un_HeadClean == TAPE_ALERT_SUPPORT_UNKNOWN) { un->un_HeadClean = TAPE_ALERT_NOT_SUPPORTED; } } rval = 0; if (un->un_HeadClean & TAPE_SEQUENTIAL_SUPPORTED) { rval = st_check_sequential_clean_bit(dev); } if ((rval <= 0) && (un->un_HeadClean & TAPE_ALERT_SUPPORTED)) { rval = st_check_alert_flags(dev); } if ((rval <= 0) && (un->un_dp->options & ST_CLN_MASK)) { rval = st_check_sense_clean_bit(dev); } if (rval < 0) { return (rval); } /* * If found a supported means to check need to clean. */ if (rval & MTF_TAPE_CLN_SUPPORTED) { /* * head needs to be cleaned. */ if (rval & MTF_TAPE_HEAD_DIRTY) { /* * Print log message only first time * found needing cleaned. */ if ((un->un_HeadClean & TAPE_PREVIOUSLY_DIRTY) == 0) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Periodic head cleaning required"); un->un_HeadClean |= TAPE_PREVIOUSLY_DIRTY; } } else { un->un_HeadClean &= ~TAPE_PREVIOUSLY_DIRTY; } } return (rval); } static int st_check_sequential_clean_bit(dev_t dev) { int rval; int ix; ushort_t parameter; struct uscsi_cmd *cmd; struct log_sequential_page *sp; struct log_sequential_page_parameter *prm; char cdb[CDB_GROUP1] = { SCMD_LOG_SENSE_G1, 0, TAPE_SEQUENTIAL_PAGE | CURRENT_CUMULATIVE_VALUES, 0, 0, 0, 0, (char)(sizeof (struct log_sequential_page) >> 8), (char)(sizeof (struct log_sequential_page)), 0 }; GET_SOFT_STATE(dev); cmd = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); sp = kmem_zalloc(sizeof (struct log_sequential_page), KM_SLEEP); cmd->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; cmd->uscsi_timeout = un->un_dp->non_motion_timeout; cmd->uscsi_cdb = cdb; cmd->uscsi_cdblen = CDB_GROUP1; cmd->uscsi_bufaddr = (caddr_t)sp; cmd->uscsi_buflen = sizeof (struct log_sequential_page); rval = st_ioctl_cmd(dev, cmd, FKIOCTL); if (rval || cmd->uscsi_status || cmd->uscsi_resid) { rval = -1; } else if (sp->log_page.code != TAPE_SEQUENTIAL_PAGE) { rval = -1; } prm = &sp->param[0]; for (ix = 0; rval == 0 && ix < TAPE_SEQUENTIAL_PAGE_PARA; ix++) { if (prm->log_param.length == 0) { break; } parameter = (((prm->log_param.pc_hi << 8) & 0xff00) + (prm->log_param.pc_lo & 0xff)); if (parameter == SEQUENTIAL_NEED_CLN) { rval = MTF_TAPE_CLN_SUPPORTED; if (prm->param_value[prm->log_param.length - 1]) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "sequential log says head dirty\n"); rval |= MTF_TAPE_HEAD_DIRTY; } } prm = (struct log_sequential_page_parameter *) &prm->param_value[prm->log_param.length]; } kmem_free(cmd, sizeof (struct uscsi_cmd)); kmem_free(sp, sizeof (struct log_sequential_page)); return (rval); } static int st_check_alert_flags(dev_t dev) { struct st_tape_alert *ta; struct uscsi_cmd *com; unsigned ix, length; int rval; tape_alert_flags flag; char cdb[CDB_GROUP1] = { SCMD_LOG_SENSE_G1, 0, TAPE_ALERT_PAGE | CURRENT_THRESHOLD_VALUES, 0, 0, 0, 0, (char)(sizeof (struct st_tape_alert) >> 8), (char)(sizeof (struct st_tape_alert)), 0 }; GET_SOFT_STATE(dev); com = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); ta = kmem_zalloc(sizeof (struct st_tape_alert), KM_SLEEP); com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP1; com->uscsi_bufaddr = (caddr_t)ta; com->uscsi_buflen = sizeof (struct st_tape_alert); com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; com->uscsi_timeout = un->un_dp->non_motion_timeout; rval = st_ioctl_cmd(dev, com, FKIOCTL); if (rval || com->uscsi_status || com->uscsi_resid) { rval = -1; /* uscsi-command failed */ } else if (ta->log_page.code != TAPE_ALERT_PAGE) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Not Alert Log Page returned 0x%X\n", ta->log_page.code); rval = -1; } length = (ta->log_page.length_hi << 8) + ta->log_page.length_lo; if (length != TAPE_ALERT_PARAMETER_LENGTH) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "TapeAlert length %d\n", length); } for (ix = 0; ix < TAPE_ALERT_MAX_PARA; ix++) { /* * if rval is bad before the first pass don't bother */ if (ix == 0 && rval != 0) { break; } flag = ((ta->param[ix].log_param.pc_hi << 8) + ta->param[ix].log_param.pc_lo); if ((ta->param[ix].param_value & 1) == 0) { continue; } /* * check to see if current parameter is of interest. * CLEAN_FOR_ERRORS is vendor specific to 9840 9940 stk's. */ if ((flag == TAF_CLEAN_NOW) || (flag == TAF_CLEAN_PERIODIC) || ((flag == CLEAN_FOR_ERRORS) && (un->un_dp->type == ST_TYPE_STK9840))) { rval = MTF_TAPE_CLN_SUPPORTED; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "alert_page drive needs clean %d\n", flag); un->un_HeadClean |= TAPE_ALERT_STILL_DIRTY; rval |= MTF_TAPE_HEAD_DIRTY; } else if (flag == TAF_CLEANING_MEDIA) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "alert_page drive was cleaned\n"); un->un_HeadClean &= ~TAPE_ALERT_STILL_DIRTY; } } /* * Report it as dirty till we see it cleaned */ if (un->un_HeadClean & TAPE_ALERT_STILL_DIRTY) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "alert_page still dirty\n"); rval |= MTF_TAPE_HEAD_DIRTY; } kmem_free(com, sizeof (struct uscsi_cmd)); kmem_free(ta, sizeof (struct st_tape_alert)); return (rval); } static int st_check_sense_clean_bit(dev_t dev) { uchar_t *sensep; char cdb[CDB_GROUP0]; struct uscsi_cmd *com; ushort_t byte_pos; uchar_t bit_mask; unsigned length; int index; int rval; GET_SOFT_STATE(dev); /* * Since this tape does not support Tape Alert, * we now try to get the cleanbit status via * Request Sense. */ if ((un->un_dp->options & ST_CLN_MASK) == ST_CLN_TYPE_1) { index = 0; } else if ((un->un_dp->options & ST_CLN_MASK) == ST_CLN_TYPE_2) { index = 1; } else if ((un->un_dp->options & ST_CLN_MASK) == ST_CLN_TYPE_3) { index = 2; } else { return (-1); } byte_pos = st_cln_bit_position[index].cln_bit_byte; bit_mask = st_cln_bit_position[index].cln_bit_mask; length = byte_pos + 1; com = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); sensep = kmem_zalloc(length, KM_SLEEP); cdb[0] = SCMD_REQUEST_SENSE; cdb[1] = 0; cdb[2] = 0; cdb[3] = 0; cdb[4] = (char)length; cdb[5] = 0; com->uscsi_cdb = cdb; com->uscsi_cdblen = CDB_GROUP0; com->uscsi_bufaddr = (caddr_t)sensep; com->uscsi_buflen = length; com->uscsi_flags = USCSI_DIAGNOSE | USCSI_SILENT | USCSI_READ; com->uscsi_timeout = un->un_dp->non_motion_timeout; rval = st_ioctl_cmd(dev, com, FKIOCTL); if (rval || com->uscsi_status || com->uscsi_resid) { rval = -1; } else { rval = MTF_TAPE_CLN_SUPPORTED; if ((sensep[byte_pos] & bit_mask) == bit_mask) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "sense data says head dirty\n"); rval |= MTF_TAPE_HEAD_DIRTY; } } kmem_free(com, sizeof (struct uscsi_cmd)); kmem_free(sensep, length); return (rval); } /* * st_clear_unit_attention * * run test unit ready's to clear out outstanding * unit attentions. * returns zero for SUCCESS or the errno from st_cmd call */ static int st_clear_unit_attentions(dev_t dev_instance, int max_trys) { int i = 0; int rval; do { rval = st_cmd(dev_instance, SCMD_TEST_UNIT_READY, 0, SYNC_CMD); } while ((rval != 0) && (rval != ENXIO) && (++i < max_trys)); return (rval); } static void st_calculate_timeouts(struct scsi_tape *un) { if (un->un_dp->non_motion_timeout == 0) { if (un->un_dp->options & ST_LONG_TIMEOUTS) { un->un_dp->non_motion_timeout = st_io_time * st_long_timeout_x; } else { un->un_dp->non_motion_timeout = (ushort_t)st_io_time; } } if (un->un_dp->io_timeout == 0) { if (un->un_dp->options & ST_LONG_TIMEOUTS) { un->un_dp->io_timeout = st_io_time * st_long_timeout_x; } else { un->un_dp->io_timeout = (ushort_t)st_io_time; } } if (un->un_dp->rewind_timeout == 0) { if (un->un_dp->options & ST_LONG_TIMEOUTS) { un->un_dp->rewind_timeout = st_space_time * st_long_timeout_x; } else { un->un_dp->rewind_timeout = (ushort_t)st_space_time; } } if (un->un_dp->space_timeout == 0) { if (un->un_dp->options & ST_LONG_TIMEOUTS) { un->un_dp->space_timeout = st_space_time * st_long_timeout_x; } else { un->un_dp->space_timeout = (ushort_t)st_space_time; } } if (un->un_dp->load_timeout == 0) { if (un->un_dp->options & ST_LONG_TIMEOUTS) { un->un_dp->load_timeout = st_space_time * st_long_timeout_x; } else { un->un_dp->load_timeout = (ushort_t)st_space_time; } } if (un->un_dp->unload_timeout == 0) { if (un->un_dp->options & ST_LONG_TIMEOUTS) { un->un_dp->unload_timeout = st_space_time * st_long_timeout_x; } else { un->un_dp->unload_timeout = (ushort_t)st_space_time; } } if (un->un_dp->erase_timeout == 0) { if (un->un_dp->options & ST_LONG_ERASE) { un->un_dp->erase_timeout = st_space_time * st_long_space_time_x; } else { un->un_dp->erase_timeout = (ushort_t)st_space_time; } } } /*ARGSUSED*/ static writablity st_is_not_wormable(struct scsi_tape *un) { return (RDWR); } static writablity st_is_hp_lto_tape_worm(struct scsi_tape *un) { writablity wrt; /* Mode sense should be current */ switch (un->un_mspl->media_type) { case 0x00: switch (un->un_mspl->density) { case 0x40: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has standard Gen I media loaded\n"); break; case 0x42: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has standard Gen II media loaded\n"); break; case 0x44: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has standard Gen III media loaded\n"); break; case 0x46: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has standard Gen IV media loaded\n"); break; default: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has standard unknown 0x%X media loaded\n", un->un_mspl->density); } wrt = RDWR; break; case 0x01: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has WORM medium loaded\n"); wrt = WORM; break; case 0x80: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has CD-ROM emulation medium loaded\n"); wrt = WORM; break; default: ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has an unexpected medium type 0x%X loaded\n", un->un_mspl->media_type); wrt = RDWR; } return (wrt); } #define LTO_REQ_INQUIRY 44 static writablity st_is_hp_lto_worm(struct scsi_tape *un) { char *buf; int result; writablity wrt; buf = kmem_zalloc(LTO_REQ_INQUIRY, KM_SLEEP); result = st_get_special_inquiry(un, LTO_REQ_INQUIRY, buf, 0); if (result != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Read Standard Inquiry for WORM support failed"); wrt = ERROR; } else if ((buf[40] & 1) == 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive is NOT WORMable\n"); /* This drive doesn't support it so don't check again */ un->un_dp->options &= ~ST_WORMABLE; wrt = RDWR; un->un_wormable = st_is_not_wormable; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive supports WORM version %d\n", buf[40] >> 1); un->un_wormable = st_is_hp_lto_tape_worm; wrt = un->un_wormable(un); } kmem_free(buf, LTO_REQ_INQUIRY); /* * If drive doesn't support it no point in checking further. */ return (wrt); } static writablity st_is_t10_worm_device(struct scsi_tape *un) { writablity wrt; if (un->un_mspl->media_type == 0x3c) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has WORM media loaded\n"); wrt = WORM; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has non WORM media loaded\n"); wrt = RDWR; } return (wrt); } #define SEQ_CAP_PAGE (char)0xb0 static writablity st_is_t10_worm(struct scsi_tape *un) { char *buf; int result; writablity wrt; buf = kmem_zalloc(6, KM_SLEEP); result = st_get_special_inquiry(un, 6, buf, SEQ_CAP_PAGE); if (result != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Read Vitial Inquiry for Sequental Capability" " WORM support failed %x", result); wrt = ERROR; } else if ((buf[4] & 1) == 0) { ASSERT(buf[1] == SEQ_CAP_PAGE); ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive is NOT WORMable\n"); /* This drive doesn't support it so don't check again */ un->un_dp->options &= ~ST_WORMABLE; wrt = RDWR; un->un_wormable = st_is_not_wormable; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive supports WORM\n"); un->un_wormable = st_is_t10_worm_device; wrt = un->un_wormable(un); } kmem_free(buf, 6); return (wrt); } #define STK_REQ_SENSE 26 static writablity st_is_stk_worm(struct scsi_tape *un) { char cdb[CDB_GROUP0] = {SCMD_REQUEST_SENSE, 0, 0, 0, STK_REQ_SENSE, 0}; struct scsi_extended_sense *sense; struct uscsi_cmd *cmd; char *buf; int result; writablity wrt; cmd = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); buf = kmem_alloc(STK_REQ_SENSE, KM_SLEEP); sense = (struct scsi_extended_sense *)buf; cmd->uscsi_flags = USCSI_READ; cmd->uscsi_timeout = un->un_dp->non_motion_timeout; cmd->uscsi_cdb = &cdb[0]; cmd->uscsi_bufaddr = buf; cmd->uscsi_buflen = STK_REQ_SENSE; cmd->uscsi_cdblen = CDB_GROUP0; cmd->uscsi_rqlen = 0; cmd->uscsi_rqbuf = NULL; result = st_ioctl_cmd(un->un_dev, cmd, FKIOCTL); if (result != 0 || cmd->uscsi_status != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Request Sense for WORM failed"); wrt = RDWR; } else if (sense->es_add_len + 8 < 24) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive didn't send enough sense data for WORM byte %d\n", sense->es_add_len + 8); wrt = RDWR; un->un_wormable = st_is_not_wormable; } else if ((buf[24]) & 0x02) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has WORM tape loaded\n"); wrt = WORM; un->un_wormable = st_is_stk_worm; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive has normal tape loaded\n"); wrt = RDWR; un->un_wormable = st_is_stk_worm; } kmem_free(buf, STK_REQ_SENSE); kmem_free(cmd, sizeof (struct uscsi_cmd)); return (wrt); } #define DLT_INQ_SZ 44 static writablity st_is_dlt_tape_worm(struct scsi_tape *un) { caddr_t buf; int result; writablity wrt; buf = kmem_alloc(DLT_INQ_SZ, KM_SLEEP); /* Read Attribute Media Type */ result = st_read_attributes(un, 0x0408, buf, 10); /* * If this quantum drive is attached via an HBA that cannot * support thr read attributes command return error in the * hope that someday they will support the t10 method. */ if (result == EINVAL && un->un_max_cdb_sz < CDB_GROUP4) { scsi_log(ST_DEVINFO, st_label, SCSI_DEBUG, "Read Attribute Command for WORM Media detection is not " "supported on the HBA that this drive is attached to."); wrt = RDWR; un->un_wormable = st_is_not_wormable; goto out; } if (result != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Read Attribute Command for WORM Media returned 0x%x", result); wrt = RDWR; un->un_dp->options &= ~ST_WORMABLE; goto out; } if ((uchar_t)buf[9] == 0x80) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive media is WORM\n"); wrt = WORM; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive media is not WORM Media 0x%x\n", (uchar_t)buf[9]); wrt = RDWR; } out: kmem_free(buf, DLT_INQ_SZ); return (wrt); } static writablity st_is_dlt_worm(struct scsi_tape *un) { caddr_t buf; int result; writablity wrt; buf = kmem_alloc(DLT_INQ_SZ, KM_SLEEP); result = st_get_special_inquiry(un, DLT_INQ_SZ, buf, 0xC0); if (result != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Read Vendor Specific Inquiry for WORM support failed"); wrt = RDWR; goto out; } if ((buf[2] & 1) == 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive is not WORMable\n"); wrt = RDWR; un->un_dp->options &= ~ST_WORMABLE; un->un_wormable = st_is_not_wormable; goto out; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drive is WORMable\n"); un->un_wormable = st_is_dlt_tape_worm; wrt = un->un_wormable(un); } out: kmem_free(buf, DLT_INQ_SZ); return (wrt); } typedef struct { struct modeheader_seq header; #if defined(_BIT_FIELDS_LTOH) /* X86 */ uchar_t pagecode :6, :2; uchar_t page_len; uchar_t syslogalive :2, device :1, abs :1, ulpbot :1, prth :1, ponej :1, ait :1; uchar_t span; uchar_t :6, worm :1, mic :1; uchar_t worm_cap :1, :7; uint32_t :32; #else /* SPARC */ uchar_t :2, pagecode :6; uchar_t page_len; uchar_t ait :1, device :1, abs :1, ulpbot :1, prth :1, ponej :1, syslogalive :2; uchar_t span; uchar_t mic :1, worm :1, :6; uchar_t :7, worm_cap :1; uint32_t :32; #endif }ait_dev_con; #define AIT_DEV_PAGE 0x31 static writablity st_is_sony_worm(struct scsi_tape *un) { int result; writablity wrt; ait_dev_con *ait_conf; ait_conf = kmem_zalloc(sizeof (ait_dev_con), KM_SLEEP); result = st_gen_mode_sense(un, AIT_DEV_PAGE, (struct seq_mode *)ait_conf, sizeof (ait_dev_con)); if (result == 0) { if (ait_conf->pagecode != AIT_DEV_PAGE) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "returned page 0x%x not 0x%x AIT_DEV_PAGE\n", ait_conf->pagecode, AIT_DEV_PAGE); wrt = RDWR; un->un_wormable = st_is_not_wormable; } else if (ait_conf->worm_cap) { un->un_wormable = st_is_sony_worm; ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drives is WORMable\n"); if (ait_conf->worm) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Media is WORM\n"); wrt = WORM; } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Media is not WORM\n"); wrt = RDWR; } } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Drives not is WORMable\n"); wrt = RDWR; /* No further checking required */ un->un_dp->options &= ~ST_WORMABLE; } } else { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "AIT device config mode sense page read command failed" " result = %d ", result); wrt = ERROR; un->un_wormable = st_is_not_wormable; } kmem_free(ait_conf, sizeof (ait_dev_con)); return (wrt); } static writablity st_is_drive_worm(struct scsi_tape *un) { writablity wrt; switch (un->un_dp->type) { case MT_ISDLT: wrt = st_is_dlt_worm(un); break; case MT_ISSTK9840: wrt = st_is_stk_worm(un); break; case MT_IS8MM: case MT_ISAIT: wrt = st_is_sony_worm(un); break; case MT_LTO: if (strncmp("HP ", un->un_dp->vid, 3) == 0) { wrt = st_is_hp_lto_worm(un); } else { wrt = st_is_t10_worm(un); } break; default: wrt = ERROR; break; } /* * If any of the above failed try the t10 standard method. */ if (wrt == ERROR) { wrt = st_is_t10_worm(un); } /* * Unknown method for detecting WORM media. */ if (wrt == ERROR) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "Unknown method for WORM media detection\n"); wrt = RDWR; un->un_dp->options &= ~ST_WORMABLE; } return (wrt); } static int st_read_attributes(struct scsi_tape *un, uint16_t attribute, caddr_t buf, size_t size) { uchar_t cdb[CDB_GROUP4]; struct uscsi_cmd *cmd; int result; cdb[0] = SCMD_READ_ATTRIBUTE; cdb[1] = 0; cdb[2] = 0; cdb[3] = 0; cdb[4] = 0; cdb[5] = 0; cdb[6] = 0; cdb[7] = 0; cdb[8] = (uchar_t)(attribute >> 8); cdb[9] = (uchar_t)(attribute); cdb[10] = (uchar_t)(size >> 24); cdb[11] = (uchar_t)(size >> 16); cdb[12] = (uchar_t)(size >> 8); cdb[13] = (uchar_t)(size); cdb[14] = 0; cdb[15] = 0; cmd = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); cmd->uscsi_flags = USCSI_READ | USCSI_DIAGNOSE; cmd->uscsi_timeout = un->un_dp->non_motion_timeout; cmd->uscsi_cdb = (caddr_t)&cdb[0]; cmd->uscsi_bufaddr = (caddr_t)buf; cmd->uscsi_buflen = size; cmd->uscsi_cdblen = sizeof (cdb); result = st_ioctl_cmd(un->un_dev, cmd, FKIOCTL); if (result != 0 || cmd->uscsi_status != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_read_attribute failed: result %d status %d\n", result, cmd->uscsi_status); if (result == 0) { result = EIO; } } kmem_free(cmd, sizeof (cdb)); return (result); } static int st_get_special_inquiry(struct scsi_tape *un, uchar_t size, caddr_t dest, uchar_t page) { char cdb[CDB_GROUP0]; struct scsi_extended_sense *sense; struct uscsi_cmd *cmd; int result; cdb[0] = SCMD_INQUIRY; cdb[1] = page ? 1 : 0; cdb[2] = page; cdb[3] = 0; cdb[4] = size; cdb[5] = 0; cmd = kmem_zalloc(sizeof (struct uscsi_cmd), KM_SLEEP); sense = kmem_alloc(sizeof (struct scsi_extended_sense), KM_SLEEP); cmd->uscsi_flags = USCSI_READ | USCSI_RQENABLE; cmd->uscsi_timeout = un->un_dp->non_motion_timeout; cmd->uscsi_cdb = &cdb[0]; cmd->uscsi_bufaddr = dest; cmd->uscsi_buflen = size; cmd->uscsi_cdblen = CDB_GROUP0; cmd->uscsi_rqlen = sizeof (struct scsi_extended_sense); cmd->uscsi_rqbuf = (caddr_t)sense; result = st_ioctl_cmd(un->un_dev, cmd, FKIOCTL); if (result != 0 || cmd->uscsi_status != 0) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "st_get_special_inquiry() failed for page %x", page); if (result == 0) { result = EIO; } } kmem_free(sense, sizeof (struct scsi_extended_sense)); kmem_free(cmd, sizeof (struct uscsi_cmd)); return (result); } #if defined(__i386) || defined(__amd64) /* * release contig_mem and wake up waiting thread, if any */ static void st_release_contig_mem(struct scsi_tape *un, struct contig_mem *cp) { mutex_enter(ST_MUTEX); cp->cm_next = un->un_contig_mem; un->un_contig_mem = cp; un->un_contig_mem_available_num++; cv_broadcast(&un->un_contig_mem_cv); mutex_exit(ST_MUTEX); } /* * St_get_contig_mem will return a contig_mem if there is one available * in current system. Otherwise, it will try to alloc one, if the total * number of contig_mem is within st_max_contig_mem_num. * It will sleep, if allowed by caller or return NULL, if no contig_mem * is available for now. */ static struct contig_mem * st_get_contig_mem(struct scsi_tape *un, size_t len, int alloc_flags) { size_t rlen; struct contig_mem *cp = NULL; ddi_acc_handle_t acc_hdl; caddr_t addr; int big_enough = 0; int (*dma_alloc_cb)() = (alloc_flags == KM_SLEEP) ? DDI_DMA_SLEEP : DDI_DMA_DONTWAIT; /* Try to get one available contig_mem */ mutex_enter(ST_MUTEX); if (un->un_contig_mem_available_num > 0) { ST_GET_CONTIG_MEM_HEAD(un, cp, len, big_enough); } else if (un->un_contig_mem_total_num < st_max_contig_mem_num) { /* * we failed to get one. we're going to * alloc one more contig_mem for this I/O */ mutex_exit(ST_MUTEX); cp = (struct contig_mem *)kmem_zalloc( sizeof (struct contig_mem) + biosize(), alloc_flags); if (cp == NULL) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "alloc contig_mem failure\n"); return (NULL); /* cannot get one */ } cp->cm_bp = (struct buf *) (((caddr_t)cp) + sizeof (struct contig_mem)); bioinit(cp->cm_bp); mutex_enter(ST_MUTEX); un->un_contig_mem_total_num++; /* one more available */ } else { /* * we failed to get one and we're NOT allowed to * alloc more contig_mem */ if (alloc_flags == KM_SLEEP) { while (un->un_contig_mem_available_num <= 0) { cv_wait(&un->un_contig_mem_cv, ST_MUTEX); } ST_GET_CONTIG_MEM_HEAD(un, cp, len, big_enough); } else { mutex_exit(ST_MUTEX); ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "alloc contig_mem failure\n"); return (NULL); /* cannot get one */ } } mutex_exit(ST_MUTEX); /* We need to check if this block of mem is big enough for this I/O */ if (cp->cm_len < len) { /* not big enough, need to alloc a new one */ if (ddi_dma_mem_alloc(un->un_contig_mem_hdl, len, &st_acc_attr, DDI_DMA_STREAMING, dma_alloc_cb, NULL, &addr, &rlen, &acc_hdl) != DDI_SUCCESS) { ST_DEBUG2(ST_DEVINFO, st_label, SCSI_DEBUG, "alloc contig_mem failure: not enough mem\n"); st_release_contig_mem(un, cp); cp = NULL; } else { if (cp->cm_addr) { /* release previous one before attach new one */ ddi_dma_mem_free(&cp->cm_acc_hdl); } mutex_enter(ST_MUTEX); un->un_max_contig_mem_len = un->un_max_contig_mem_len >= len ? un->un_max_contig_mem_len : len; mutex_exit(ST_MUTEX); /* attach new mem to this cp */ cp->cm_addr = addr; cp->cm_acc_hdl = acc_hdl; cp->cm_len = len; goto alloc_ok; /* get one usable cp */ } } else { goto alloc_ok; /* get one usable cp */ } /* cannot find/alloc a usable cp, when we get here */ mutex_enter(ST_MUTEX); if ((un->un_max_contig_mem_len < len) || (alloc_flags != KM_SLEEP)) { mutex_exit(ST_MUTEX); return (NULL); } /* * we're allowed to sleep, and there is one big enough * contig mem in the system, which is currently in use, * wait for it... */ big_enough = 1; do { cv_wait(&un->un_contig_mem_cv, ST_MUTEX); ST_GET_CONTIG_MEM_HEAD(un, cp, len, big_enough); } while (cp == NULL); mutex_exit(ST_MUTEX); /* we get the big enough contig mem, finally */ alloc_ok: /* init bp attached to this cp */ bioreset(cp->cm_bp); cp->cm_bp->b_un.b_addr = cp->cm_addr; cp->cm_bp->b_private = (void *)cp; return (cp); } /* * this is the biodone func for the bp used in big block I/O */ static int st_bigblk_xfer_done(struct buf *bp) { struct contig_mem *cp; struct buf *orig_bp; int remapped = 0; int ioerr; struct scsi_tape *un; /* sanity check */ if (bp == NULL) { return (DDI_FAILURE); } un = ddi_get_soft_state(st_state, MTUNIT(bp->b_edev)); if (un == NULL) { return (DDI_FAILURE); } cp = (struct contig_mem *)bp->b_private; orig_bp = cp->cm_bp; /* get back the bp we have replaced */ cp->cm_bp = bp; /* special handling for special I/O */ if (cp->cm_use_sbuf) { #ifndef __lock_lint ASSERT(un->un_sbuf_busy); #endif un->un_sbufp = orig_bp; cp->cm_use_sbuf = 0; } orig_bp->b_resid = bp->b_resid; ioerr = geterror(bp); if (ioerr != 0) { bioerror(orig_bp, ioerr); } else if (orig_bp->b_flags & B_READ) { /* copy data back to original bp */ if (orig_bp->b_flags & (B_PHYS | B_PAGEIO)) { bp_mapin(orig_bp); remapped = 1; } bcopy(bp->b_un.b_addr, orig_bp->b_un.b_addr, bp->b_bcount - bp->b_resid); if (remapped) bp_mapout(orig_bp); } st_release_contig_mem(un, cp); biodone(orig_bp); return (DDI_SUCCESS); } /* * We use this func to replace original bp that may not be able to do I/O * in big block size with one that can */ static struct buf * st_get_bigblk_bp(struct buf *bp) { struct contig_mem *cp; struct scsi_tape *un; struct buf *cont_bp; int remapped = 0; un = ddi_get_soft_state(st_state, MTUNIT(bp->b_edev)); if (un == NULL) { return (bp); } /* try to get one contig_mem */ cp = st_get_contig_mem(un, bp->b_bcount, KM_SLEEP); if (!cp) { scsi_log(ST_DEVINFO, st_label, CE_WARN, "Cannot alloc contig buf for I/O for %lu blk size", bp->b_bcount); return (bp); } cont_bp = cp->cm_bp; cp->cm_bp = bp; /* make sure that we "are" using un_sbufp for special I/O */ if (bp == un->un_sbufp) { #ifndef __lock_lint ASSERT(un->un_sbuf_busy); #endif un->un_sbufp = cont_bp; cp->cm_use_sbuf = 1; } /* clone bp */ cont_bp->b_bcount = bp->b_bcount; cont_bp->b_resid = bp->b_resid; cont_bp->b_iodone = st_bigblk_xfer_done; cont_bp->b_file = bp->b_file; cont_bp->b_offset = bp->b_offset; cont_bp->b_dip = bp->b_dip; cont_bp->b_error = 0; cont_bp->b_proc = NULL; cont_bp->b_flags = bp->b_flags & ~(B_PAGEIO | B_PHYS | B_SHADOW); cont_bp->b_shadow = NULL; cont_bp->b_pages = NULL; cont_bp->b_edev = bp->b_edev; cont_bp->b_dev = bp->b_dev; cont_bp->b_lblkno = bp->b_lblkno; cont_bp->b_forw = bp->b_forw; cont_bp->b_back = bp->b_back; cont_bp->av_forw = bp->av_forw; cont_bp->av_back = bp->av_back; cont_bp->b_bufsize = bp->b_bufsize; /* get data in original bp */ if (bp->b_flags & B_WRITE) { if (bp->b_flags & (B_PHYS | B_PAGEIO)) { bp_mapin(bp); remapped = 1; } bcopy(bp->b_un.b_addr, cont_bp->b_un.b_addr, bp->b_bcount); if (remapped) bp_mapout(bp); } return (cont_bp); } #else #ifdef __lock_lint static int st_bigblk_xfer_done(struct buf *bp) { return (0); } #endif #endif