/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (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 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * SCSA HBA nexus driver that emulates an HBA connected to SCSI target * devices (large disks). */ #ifdef DEBUG #define EMUL64DEBUG #endif #include #include #include #include #include #include #include #include #include #include #include #include int emul64_usetaskq = 1; /* set to zero for debugging */ int emul64debug = 0; #ifdef EMUL64DEBUG static int emul64_cdb_debug = 0; #include #endif /* * cb_ops function prototypes */ static int emul64_ioctl(dev_t, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp); /* * dev_ops functions prototypes */ static int emul64_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result); static int emul64_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); static int emul64_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); /* * Function prototypes * * SCSA functions exported by means of the transport table */ static int emul64_tran_tgt_init(dev_info_t *hba_dip, dev_info_t *tgt_dip, scsi_hba_tran_t *tran, struct scsi_device *sd); static int emul64_scsi_start(struct scsi_address *ap, struct scsi_pkt *pkt); static void emul64_pkt_comp(void *); static int emul64_scsi_abort(struct scsi_address *ap, struct scsi_pkt *pkt); static int emul64_scsi_reset(struct scsi_address *ap, int level); static int emul64_scsi_getcap(struct scsi_address *ap, char *cap, int whom); static int emul64_scsi_setcap(struct scsi_address *ap, char *cap, int value, int whom); static struct scsi_pkt *emul64_scsi_init_pkt(struct scsi_address *ap, struct scsi_pkt *pkt, struct buf *bp, int cmdlen, int statuslen, int tgtlen, int flags, int (*callback)(), caddr_t arg); static void emul64_scsi_destroy_pkt(struct scsi_address *ap, struct scsi_pkt *pkt); static void emul64_scsi_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt); static void emul64_scsi_sync_pkt(struct scsi_address *ap, struct scsi_pkt *pkt); static int emul64_scsi_reset_notify(struct scsi_address *ap, int flag, void (*callback)(caddr_t), caddr_t arg); /* * internal functions */ static void emul64_i_initcap(struct emul64 *emul64); static void emul64_i_log(struct emul64 *emul64, int level, char *fmt, ...); static int emul64_get_tgtrange(struct emul64 *, intptr_t, emul64_tgt_t **, emul64_tgt_range_t *); static int emul64_write_off(struct emul64 *, emul64_tgt_t *, emul64_tgt_range_t *); static int emul64_write_on(struct emul64 *, emul64_tgt_t *, emul64_tgt_range_t *); static emul64_nowrite_t *emul64_nowrite_alloc(emul64_range_t *); static void emul64_nowrite_free(emul64_nowrite_t *); static emul64_nowrite_t *emul64_find_nowrite(emul64_tgt_t *, diskaddr_t start_block, size_t blkcnt, emul64_rng_overlap_t *overlapp, emul64_nowrite_t ***prevp); extern emul64_tgt_t *find_tgt(struct emul64 *, ushort_t, ushort_t); #ifdef EMUL64DEBUG static void emul64_debug_dump_cdb(struct scsi_address *ap, struct scsi_pkt *pkt); #endif #ifdef _DDICT static int ddi_in_panic(void); static int ddi_in_panic() { return (0); } #ifndef SCSI_CAP_RESET_NOTIFICATION #define SCSI_CAP_RESET_NOTIFICATION 14 #endif #ifndef SCSI_RESET_NOTIFY #define SCSI_RESET_NOTIFY 0x01 #endif #ifndef SCSI_RESET_CANCEL #define SCSI_RESET_CANCEL 0x02 #endif #endif /* * Tunables: * * emul64_max_task * The taskq facility is used to queue up SCSI start requests on a per * controller basis. If the maximum number of queued tasks is hit, * taskq_ent_alloc() delays for a second, which adversely impacts our * performance. This value establishes the maximum number of task * queue entries when taskq_create is called. * * emul64_task_nthreads * Specifies the number of threads that should be used to process a * controller's task queue. Our init function sets this to the number * of CPUs on the system, but this can be overridden in emul64.conf. */ int emul64_max_task = 16; int emul64_task_nthreads = 1; /* * Local static data */ static void *emul64_state = NULL; /* * Character/block operations. */ static struct cb_ops emul64_cbops = { scsi_hba_open, /* cb_open */ scsi_hba_close, /* cb_close */ nodev, /* cb_strategy */ nodev, /* cb_print */ nodev, /* cb_dump */ nodev, /* cb_read */ nodev, /* cb_write */ emul64_ioctl, /* cb_ioctl */ nodev, /* cb_devmap */ nodev, /* cb_mmap */ nodev, /* cb_segmap */ nochpoll, /* cb_chpoll */ ddi_prop_op, /* cb_prop_op */ NULL, /* cb_str */ D_MP | D_64BIT | D_HOTPLUG, /* cb_flag */ CB_REV, /* cb_rev */ nodev, /* cb_aread */ nodev /* cb_awrite */ }; /* * autoconfiguration routines. */ static struct dev_ops emul64_ops = { DEVO_REV, /* rev, */ 0, /* refcnt */ emul64_info, /* getinfo */ nulldev, /* identify */ nulldev, /* probe */ emul64_attach, /* attach */ emul64_detach, /* detach */ nodev, /* reset */ &emul64_cbops, /* char/block ops */ NULL /* bus ops */ }; char _depends_on[] = "misc/scsi"; static struct modldrv modldrv = { &mod_driverops, /* module type - driver */ "emul64 SCSI Host Bus Adapter", /* module name */ &emul64_ops, /* driver ops */ }; static struct modlinkage modlinkage = { MODREV_1, /* ml_rev - must be MODREV_1 */ &modldrv, /* ml_linkage */ NULL /* end of driver linkage */ }; int _init(void) { int ret; ret = ddi_soft_state_init(&emul64_state, sizeof (struct emul64), EMUL64_INITIAL_SOFT_SPACE); if (ret != 0) return (ret); if ((ret = scsi_hba_init(&modlinkage)) != 0) { ddi_soft_state_fini(&emul64_state); return (ret); } /* Set the number of task threads to the number of CPUs */ if (boot_max_ncpus == -1) { emul64_task_nthreads = max_ncpus; } else { emul64_task_nthreads = boot_max_ncpus; } emul64_bsd_init(); ret = mod_install(&modlinkage); if (ret != 0) { emul64_bsd_fini(); scsi_hba_fini(&modlinkage); ddi_soft_state_fini(&emul64_state); } return (ret); } int _fini(void) { int ret; if ((ret = mod_remove(&modlinkage)) != 0) return (ret); emul64_bsd_fini(); scsi_hba_fini(&modlinkage); ddi_soft_state_fini(&emul64_state); return (ret); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } /* * Given the device number return the devinfo pointer * from the scsi_device structure. */ /*ARGSUSED*/ static int emul64_info(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result) { struct emul64 *foo; int instance = getminor((dev_t)arg); switch (cmd) { case DDI_INFO_DEVT2DEVINFO: foo = ddi_get_soft_state(emul64_state, instance); if (foo != NULL) *result = (void *)foo->emul64_dip; else { *result = NULL; return (DDI_FAILURE); } break; case DDI_INFO_DEVT2INSTANCE: *result = (void *)(uintptr_t)instance; break; default: return (DDI_FAILURE); } return (DDI_SUCCESS); } /* * Attach an instance of an emul64 host adapter. Allocate data structures, * initialize the emul64 and we're on the air. */ /*ARGSUSED*/ static int emul64_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { int mutex_initted = 0; struct emul64 *emul64; int instance; scsi_hba_tran_t *tran = NULL; ddi_dma_attr_t tmp_dma_attr; emul64_bsd_get_props(dip); bzero((void *) &tmp_dma_attr, sizeof (tmp_dma_attr)); instance = ddi_get_instance(dip); switch (cmd) { case DDI_ATTACH: break; case DDI_RESUME: tran = (scsi_hba_tran_t *)ddi_get_driver_private(dip); if (!tran) { return (DDI_FAILURE); } emul64 = TRAN2EMUL64(tran); return (DDI_SUCCESS); default: emul64_i_log(NULL, CE_WARN, "emul64%d: Cmd != DDI_ATTACH/DDI_RESUME", instance); return (DDI_FAILURE); } /* * Allocate emul64 data structure. */ if (ddi_soft_state_zalloc(emul64_state, instance) != DDI_SUCCESS) { emul64_i_log(NULL, CE_WARN, "emul64%d: Failed to alloc soft state", instance); return (DDI_FAILURE); } emul64 = (struct emul64 *)ddi_get_soft_state(emul64_state, instance); if (emul64 == (struct emul64 *)NULL) { emul64_i_log(NULL, CE_WARN, "emul64%d: Bad soft state", instance); ddi_soft_state_free(emul64_state, instance); return (DDI_FAILURE); } /* * Allocate a transport structure */ tran = scsi_hba_tran_alloc(dip, SCSI_HBA_CANSLEEP); if (tran == NULL) { cmn_err(CE_WARN, "emul64: scsi_hba_tran_alloc failed\n"); goto fail; } emul64->emul64_tran = tran; emul64->emul64_dip = dip; tran->tran_hba_private = emul64; tran->tran_tgt_private = NULL; tran->tran_tgt_init = emul64_tran_tgt_init; tran->tran_tgt_probe = scsi_hba_probe; tran->tran_tgt_free = NULL; tran->tran_start = emul64_scsi_start; tran->tran_abort = emul64_scsi_abort; tran->tran_reset = emul64_scsi_reset; tran->tran_getcap = emul64_scsi_getcap; tran->tran_setcap = emul64_scsi_setcap; tran->tran_init_pkt = emul64_scsi_init_pkt; tran->tran_destroy_pkt = emul64_scsi_destroy_pkt; tran->tran_dmafree = emul64_scsi_dmafree; tran->tran_sync_pkt = emul64_scsi_sync_pkt; tran->tran_reset_notify = emul64_scsi_reset_notify; tmp_dma_attr.dma_attr_minxfer = 0x1; tmp_dma_attr.dma_attr_burstsizes = 0x7f; /* * Attach this instance of the hba */ if (scsi_hba_attach_setup(dip, &tmp_dma_attr, tran, 0) != DDI_SUCCESS) { cmn_err(CE_WARN, "emul64: scsi_hba_attach failed\n"); goto fail; } emul64->emul64_initiator_id = 2; /* * Look up the scsi-options property */ emul64->emul64_scsi_options = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 0, "scsi-options", EMUL64_DEFAULT_SCSI_OPTIONS); EMUL64_DEBUG(emul64, SCSI_DEBUG, "emul64 scsi-options=%x", emul64->emul64_scsi_options); /* mutexes to protect the emul64 request and response queue */ mutex_init(EMUL64_REQ_MUTEX(emul64), NULL, MUTEX_DRIVER, emul64->emul64_iblock); mutex_init(EMUL64_RESP_MUTEX(emul64), NULL, MUTEX_DRIVER, emul64->emul64_iblock); mutex_initted = 1; EMUL64_MUTEX_ENTER(emul64); /* * Initialize the default Target Capabilities and Sync Rates */ emul64_i_initcap(emul64); EMUL64_MUTEX_EXIT(emul64); ddi_report_dev(dip); emul64->emul64_taskq = taskq_create("emul64_comp", emul64_task_nthreads, MINCLSYSPRI, 1, emul64_max_task, 0); return (DDI_SUCCESS); fail: emul64_i_log(NULL, CE_WARN, "emul64%d: Unable to attach", instance); if (mutex_initted) { mutex_destroy(EMUL64_REQ_MUTEX(emul64)); mutex_destroy(EMUL64_RESP_MUTEX(emul64)); } if (tran) { scsi_hba_tran_free(tran); } ddi_soft_state_free(emul64_state, instance); return (DDI_FAILURE); } /*ARGSUSED*/ static int emul64_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) { struct emul64 *emul64; scsi_hba_tran_t *tran; int instance = ddi_get_instance(dip); /* get transport structure pointer from the dip */ if (!(tran = (scsi_hba_tran_t *)ddi_get_driver_private(dip))) { return (DDI_FAILURE); } /* get soft state from transport structure */ emul64 = TRAN2EMUL64(tran); if (!emul64) { return (DDI_FAILURE); } EMUL64_DEBUG(emul64, SCSI_DEBUG, "emul64_detach: cmd = %d", cmd); switch (cmd) { case DDI_DETACH: EMUL64_MUTEX_ENTER(emul64); taskq_destroy(emul64->emul64_taskq); (void) scsi_hba_detach(dip); scsi_hba_tran_free(emul64->emul64_tran); EMUL64_MUTEX_EXIT(emul64); mutex_destroy(EMUL64_REQ_MUTEX(emul64)); mutex_destroy(EMUL64_RESP_MUTEX(emul64)); EMUL64_DEBUG(emul64, SCSI_DEBUG, "emul64_detach: done"); ddi_soft_state_free(emul64_state, instance); return (DDI_SUCCESS); case DDI_SUSPEND: return (DDI_SUCCESS); default: return (DDI_FAILURE); } } /* * Function name : emul64_tran_tgt_init * * Return Values : DDI_SUCCESS if target supported, DDI_FAILURE otherwise * */ /*ARGSUSED*/ static int emul64_tran_tgt_init(dev_info_t *hba_dip, dev_info_t *tgt_dip, scsi_hba_tran_t *tran, struct scsi_device *sd) { struct emul64 *emul64; emul64_tgt_t *tgt; char **geo_vidpid = NULL; char *geo, *vidpid; uint32_t *geoip = NULL; uint_t length; uint_t length2; lldaddr_t sector_count; char prop_name[15]; int ret = DDI_FAILURE; emul64 = TRAN2EMUL64(tran); EMUL64_MUTEX_ENTER(emul64); /* * We get called for each target driver.conf node, multiple * nodes may map to the same tgt,lun (sd.conf, st.conf, etc). * Check to see if transport to tgt,lun already established. */ tgt = find_tgt(emul64, sd->sd_address.a_target, sd->sd_address.a_lun); if (tgt) { ret = DDI_SUCCESS; goto out; } /* see if we have driver.conf specified device for this target,lun */ (void) snprintf(prop_name, sizeof (prop_name), "targ_%d_%d", sd->sd_address.a_target, sd->sd_address.a_lun); if (ddi_prop_lookup_string_array(DDI_DEV_T_ANY, hba_dip, DDI_PROP_DONTPASS, prop_name, &geo_vidpid, &length) != DDI_PROP_SUCCESS) goto out; if (length < 2) { cmn_err(CE_WARN, "emul64: %s property does not have 2 " "elements", prop_name); goto out; } /* pick geometry name and vidpid string from string array */ geo = *geo_vidpid; vidpid = *(geo_vidpid + 1); /* lookup geometry property integer array */ if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, hba_dip, DDI_PROP_DONTPASS, geo, (int **)&geoip, &length2) != DDI_PROP_SUCCESS) { cmn_err(CE_WARN, "emul64: didn't get prop '%s'", geo); goto out; } if (length2 < 6) { cmn_err(CE_WARN, "emul64: property %s does not have 6 " "elements", *geo_vidpid); goto out; } /* allocate and initialize tgt structure for tgt,lun */ tgt = kmem_zalloc(sizeof (emul64_tgt_t), KM_SLEEP); rw_init(&tgt->emul64_tgt_nw_lock, NULL, RW_DRIVER, NULL); mutex_init(&tgt->emul64_tgt_blk_lock, NULL, MUTEX_DRIVER, NULL); /* create avl for data block storage */ avl_create(&tgt->emul64_tgt_data, emul64_bsd_blkcompare, sizeof (blklist_t), offsetof(blklist_t, bl_node)); /* save scsi_address and vidpid */ bcopy(sd, &tgt->emul64_tgt_saddr, sizeof (struct scsi_address)); (void) strncpy(tgt->emul64_tgt_inq, vidpid, sizeof (emul64->emul64_tgt->emul64_tgt_inq)); /* * The high order 4 bytes of the sector count always come first in * emul64.conf. They are followed by the low order 4 bytes. Not * all CPU types want them in this order, but laddr_t takes care of * this for us. We then pick up geometry (ncyl X nheads X nsect). */ sector_count._p._u = *(geoip + 0); sector_count._p._l = *(geoip + 1); /* * On 32-bit platforms, fix block size if it's greater than the * allowable maximum. */ #if !defined(_LP64) if (sector_count._f > DK_MAX_BLOCKS) sector_count._f = DK_MAX_BLOCKS; #endif tgt->emul64_tgt_sectors = sector_count._f; tgt->emul64_tgt_dtype = *(geoip + 2); tgt->emul64_tgt_ncyls = *(geoip + 3); tgt->emul64_tgt_nheads = *(geoip + 4); tgt->emul64_tgt_nsect = *(geoip + 5); /* insert target structure into list */ tgt->emul64_tgt_next = emul64->emul64_tgt; emul64->emul64_tgt = tgt; ret = DDI_SUCCESS; out: EMUL64_MUTEX_EXIT(emul64); if (geoip) ddi_prop_free(geoip); if (geo_vidpid) ddi_prop_free(geo_vidpid); return (ret); } /* * Function name : emul64_i_initcap * * Return Values : NONE * Description : Initializes the default target capabilities and * Sync Rates. * * Context : Called from the user thread through attach. * */ static void emul64_i_initcap(struct emul64 *emul64) { uint16_t cap, synch; int i; cap = 0; synch = 0; for (i = 0; i < NTARGETS_WIDE; i++) { emul64->emul64_cap[i] = cap; emul64->emul64_synch[i] = synch; } EMUL64_DEBUG(emul64, SCSI_DEBUG, "default cap = 0x%x", cap); } /* * Function name : emul64_scsi_getcap() * * Return Values : current value of capability, if defined * -1 if capability is not defined * Description : returns current capability value * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ static int emul64_scsi_getcap(struct scsi_address *ap, char *cap, int whom) { struct emul64 *emul64 = ADDR2EMUL64(ap); int rval = 0; /* * We don't allow inquiring about capabilities for other targets */ if (cap == NULL || whom == 0) { return (-1); } EMUL64_MUTEX_ENTER(emul64); switch (scsi_hba_lookup_capstr(cap)) { case SCSI_CAP_DMA_MAX: rval = 1 << 24; /* Limit to 16MB max transfer */ break; case SCSI_CAP_MSG_OUT: rval = 1; break; case SCSI_CAP_DISCONNECT: rval = 1; break; case SCSI_CAP_SYNCHRONOUS: rval = 1; break; case SCSI_CAP_WIDE_XFER: rval = 1; break; case SCSI_CAP_TAGGED_QING: rval = 1; break; case SCSI_CAP_UNTAGGED_QING: rval = 1; break; case SCSI_CAP_PARITY: rval = 1; break; case SCSI_CAP_INITIATOR_ID: rval = emul64->emul64_initiator_id; break; case SCSI_CAP_ARQ: rval = 1; break; case SCSI_CAP_LINKED_CMDS: break; case SCSI_CAP_RESET_NOTIFICATION: rval = 1; break; default: rval = -1; break; } EMUL64_MUTEX_EXIT(emul64); return (rval); } /* * Function name : emul64_scsi_setcap() * * Return Values : 1 - capability exists and can be set to new value * 0 - capability could not be set to new value * -1 - no such capability * * Description : sets a capability for a target * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ static int emul64_scsi_setcap(struct scsi_address *ap, char *cap, int value, int whom) { struct emul64 *emul64 = ADDR2EMUL64(ap); int rval = 0; /* * We don't allow setting capabilities for other targets */ if (cap == NULL || whom == 0) { return (-1); } EMUL64_MUTEX_ENTER(emul64); switch (scsi_hba_lookup_capstr(cap)) { case SCSI_CAP_DMA_MAX: case SCSI_CAP_MSG_OUT: case SCSI_CAP_PARITY: case SCSI_CAP_UNTAGGED_QING: case SCSI_CAP_LINKED_CMDS: case SCSI_CAP_RESET_NOTIFICATION: /* * None of these are settable via * the capability interface. */ break; case SCSI_CAP_DISCONNECT: rval = 1; break; case SCSI_CAP_SYNCHRONOUS: rval = 1; break; case SCSI_CAP_TAGGED_QING: rval = 1; break; case SCSI_CAP_WIDE_XFER: rval = 1; break; case SCSI_CAP_INITIATOR_ID: rval = -1; break; case SCSI_CAP_ARQ: rval = 1; break; case SCSI_CAP_TOTAL_SECTORS: emul64->nt_total_sectors[ap->a_target][ap->a_lun] = value; rval = TRUE; break; case SCSI_CAP_SECTOR_SIZE: rval = TRUE; break; default: rval = -1; break; } EMUL64_MUTEX_EXIT(emul64); return (rval); } /* * Function name : emul64_scsi_init_pkt * * Return Values : pointer to scsi_pkt, or NULL * Description : Called by kernel on behalf of a target driver * calling scsi_init_pkt(9F). * Refer to tran_init_pkt(9E) man page * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ /* ARGSUSED */ static struct scsi_pkt * emul64_scsi_init_pkt(struct scsi_address *ap, struct scsi_pkt *pkt, struct buf *bp, int cmdlen, int statuslen, int tgtlen, int flags, int (*callback)(), caddr_t arg) { struct emul64 *emul64 = ADDR2EMUL64(ap); struct emul64_cmd *sp; ASSERT(callback == NULL_FUNC || callback == SLEEP_FUNC); /* * First step of emul64_scsi_init_pkt: pkt allocation */ if (pkt == NULL) { pkt = scsi_hba_pkt_alloc(emul64->emul64_dip, ap, cmdlen, statuslen, tgtlen, sizeof (struct emul64_cmd), callback, arg); if (pkt == NULL) { cmn_err(CE_WARN, "emul64_scsi_init_pkt: " "scsi_hba_pkt_alloc failed"); return (NULL); } sp = PKT2CMD(pkt); /* * Initialize the new pkt - we redundantly initialize * all the fields for illustrative purposes. */ sp->cmd_pkt = pkt; sp->cmd_flags = 0; sp->cmd_scblen = statuslen; sp->cmd_cdblen = cmdlen; sp->cmd_emul64 = emul64; pkt->pkt_address = *ap; pkt->pkt_comp = (void (*)())NULL; pkt->pkt_flags = 0; pkt->pkt_time = 0; pkt->pkt_resid = 0; pkt->pkt_statistics = 0; pkt->pkt_reason = 0; } else { sp = PKT2CMD(pkt); } /* * Second step of emul64_scsi_init_pkt: dma allocation/move */ if (bp && bp->b_bcount != 0) { if (bp->b_flags & B_READ) { sp->cmd_flags &= ~CFLAG_DMASEND; } else { sp->cmd_flags |= CFLAG_DMASEND; } bp_mapin(bp); sp->cmd_addr = (unsigned char *) bp->b_un.b_addr; sp->cmd_count = bp->b_bcount; pkt->pkt_resid = 0; } return (pkt); } /* * Function name : emul64_scsi_destroy_pkt * * Return Values : none * Description : Called by kernel on behalf of a target driver * calling scsi_destroy_pkt(9F). * Refer to tran_destroy_pkt(9E) man page * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ static void emul64_scsi_destroy_pkt(struct scsi_address *ap, struct scsi_pkt *pkt) { struct emul64_cmd *sp = PKT2CMD(pkt); /* * emul64_scsi_dmafree inline to make things faster */ if (sp->cmd_flags & CFLAG_DMAVALID) { /* * Free the mapping. */ sp->cmd_flags &= ~CFLAG_DMAVALID; } /* * Free the pkt */ scsi_hba_pkt_free(ap, pkt); } /* * Function name : emul64_scsi_dmafree() * * Return Values : none * Description : free dvma resources * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ /*ARGSUSED*/ static void emul64_scsi_dmafree(struct scsi_address *ap, struct scsi_pkt *pkt) { } /* * Function name : emul64_scsi_sync_pkt() * * Return Values : none * Description : sync dma * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ /*ARGSUSED*/ static void emul64_scsi_sync_pkt(struct scsi_address *ap, struct scsi_pkt *pkt) { } /* * routine for reset notification setup, to register or cancel. */ static int emul64_scsi_reset_notify(struct scsi_address *ap, int flag, void (*callback)(caddr_t), caddr_t arg) { struct emul64 *emul64 = ADDR2EMUL64(ap); struct emul64_reset_notify_entry *p, *beforep; int rval = DDI_FAILURE; mutex_enter(EMUL64_REQ_MUTEX(emul64)); p = emul64->emul64_reset_notify_listf; beforep = NULL; while (p) { if (p->ap == ap) break; /* An entry exists for this target */ beforep = p; p = p->next; } if ((flag & SCSI_RESET_CANCEL) && (p != NULL)) { if (beforep == NULL) { emul64->emul64_reset_notify_listf = p->next; } else { beforep->next = p->next; } kmem_free((caddr_t)p, sizeof (struct emul64_reset_notify_entry)); rval = DDI_SUCCESS; } else if ((flag & SCSI_RESET_NOTIFY) && (p == NULL)) { p = kmem_zalloc(sizeof (struct emul64_reset_notify_entry), KM_SLEEP); p->ap = ap; p->callback = callback; p->arg = arg; p->next = emul64->emul64_reset_notify_listf; emul64->emul64_reset_notify_listf = p; rval = DDI_SUCCESS; } mutex_exit(EMUL64_REQ_MUTEX(emul64)); return (rval); } /* * Function name : emul64_scsi_start() * * Return Values : TRAN_FATAL_ERROR - emul64 has been shutdown * TRAN_BUSY - request queue is full * TRAN_ACCEPT - pkt has been submitted to emul64 * * Description : init pkt, start the request * * Context : Can be called from different kernel process threads. * Can be called by interrupt thread. */ static int emul64_scsi_start(struct scsi_address *ap, struct scsi_pkt *pkt) { struct emul64_cmd *sp = PKT2CMD(pkt); int rval = TRAN_ACCEPT; struct emul64 *emul64 = ADDR2EMUL64(ap); clock_t cur_lbolt; taskqid_t dispatched; ASSERT(mutex_owned(EMUL64_REQ_MUTEX(emul64)) == 0 || ddi_in_panic()); ASSERT(mutex_owned(EMUL64_RESP_MUTEX(emul64)) == 0 || ddi_in_panic()); EMUL64_DEBUG2(emul64, SCSI_DEBUG, "emul64_scsi_start %x", sp); pkt->pkt_reason = CMD_CMPLT; #ifdef EMUL64DEBUG if (emul64_cdb_debug) { emul64_debug_dump_cdb(ap, pkt); } #endif /* EMUL64DEBUG */ /* * calculate deadline from pkt_time * Instead of multiplying by 100 (ie. HZ), we multiply by 128 so * we can shift and at the same time have a 28% grace period * we ignore the rare case of pkt_time == 0 and deal with it * in emul64_i_watch() */ cur_lbolt = ddi_get_lbolt(); sp->cmd_deadline = cur_lbolt + (pkt->pkt_time * 128); if ((emul64_usetaskq == 0) || (pkt->pkt_flags & FLAG_NOINTR) != 0) { emul64_pkt_comp((caddr_t)pkt); } else { dispatched = NULL; if (emul64_collect_stats) { /* * If we are collecting statistics, call * taskq_dispatch in no sleep mode, so that we can * detect if we are exceeding the queue length that * was established in the call to taskq_create in * emul64_attach. If the no sleep call fails * (returns NULL), the task will be dispatched in * sleep mode below. */ dispatched = taskq_dispatch(emul64->emul64_taskq, emul64_pkt_comp, (void *)pkt, TQ_NOSLEEP); if (dispatched == NULL) { /* Queue was full. dispatch failed. */ mutex_enter(&emul64_stats_mutex); emul64_taskq_max++; mutex_exit(&emul64_stats_mutex); } } if (dispatched == NULL) { (void) taskq_dispatch(emul64->emul64_taskq, emul64_pkt_comp, (void *)pkt, TQ_SLEEP); } } done: ASSERT(mutex_owned(EMUL64_REQ_MUTEX(emul64)) == 0 || ddi_in_panic()); ASSERT(mutex_owned(EMUL64_RESP_MUTEX(emul64)) == 0 || ddi_in_panic()); return (rval); } void emul64_check_cond(struct scsi_pkt *pkt, uchar_t key, uchar_t asc, uchar_t ascq) { struct scsi_arq_status *arq = (struct scsi_arq_status *)pkt->pkt_scbp; /* got check, no data transferred and ARQ done */ arq->sts_status.sts_chk = 1; pkt->pkt_state |= STATE_ARQ_DONE; pkt->pkt_state &= ~STATE_XFERRED_DATA; /* for ARQ */ arq->sts_rqpkt_reason = CMD_CMPLT; arq->sts_rqpkt_resid = 0; arq->sts_rqpkt_state = STATE_GOT_BUS | STATE_GOT_TARGET | STATE_SENT_CMD | STATE_XFERRED_DATA | STATE_GOT_STATUS; arq->sts_sensedata.es_valid = 1; arq->sts_sensedata.es_class = 0x7; arq->sts_sensedata.es_key = key; arq->sts_sensedata.es_add_code = asc; arq->sts_sensedata.es_qual_code = ascq; } int bsd_scsi_start_stop_unit(struct scsi_pkt *); int bsd_scsi_test_unit_ready(struct scsi_pkt *); int bsd_scsi_request_sense(struct scsi_pkt *); int bsd_scsi_inquiry(struct scsi_pkt *); int bsd_scsi_format(struct scsi_pkt *); int bsd_scsi_io(struct scsi_pkt *); int bsd_scsi_log_sense(struct scsi_pkt *); int bsd_scsi_mode_sense(struct scsi_pkt *); int bsd_scsi_mode_select(struct scsi_pkt *); int bsd_scsi_read_capacity(struct scsi_pkt *); int bsd_scsi_read_capacity_16(struct scsi_pkt *); int bsd_scsi_reserve(struct scsi_pkt *); int bsd_scsi_format(struct scsi_pkt *); int bsd_scsi_release(struct scsi_pkt *); int bsd_scsi_read_defect_list(struct scsi_pkt *); int bsd_scsi_reassign_block(struct scsi_pkt *); int bsd_freeblkrange(emul64_tgt_t *, emul64_range_t *); static void emul64_handle_cmd(struct scsi_pkt *pkt) { switch (pkt->pkt_cdbp[0]) { case SCMD_START_STOP: (void) bsd_scsi_start_stop_unit(pkt); break; case SCMD_TEST_UNIT_READY: (void) bsd_scsi_test_unit_ready(pkt); break; case SCMD_REQUEST_SENSE: (void) bsd_scsi_request_sense(pkt); break; case SCMD_INQUIRY: (void) bsd_scsi_inquiry(pkt); break; case SCMD_FORMAT: (void) bsd_scsi_format(pkt); break; case SCMD_READ: case SCMD_WRITE: case SCMD_READ_G1: case SCMD_WRITE_G1: case SCMD_READ_G4: case SCMD_WRITE_G4: (void) bsd_scsi_io(pkt); break; case SCMD_LOG_SENSE_G1: (void) bsd_scsi_log_sense(pkt); break; case SCMD_MODE_SENSE: case SCMD_MODE_SENSE_G1: (void) bsd_scsi_mode_sense(pkt); break; case SCMD_MODE_SELECT: case SCMD_MODE_SELECT_G1: (void) bsd_scsi_mode_select(pkt); break; case SCMD_READ_CAPACITY: (void) bsd_scsi_read_capacity(pkt); break; case SCMD_SVC_ACTION_IN_G4: if (pkt->pkt_cdbp[1] == SSVC_ACTION_READ_CAPACITY_G4) { (void) bsd_scsi_read_capacity_16(pkt); } else { cmn_err(CE_WARN, "emul64: unrecognized G4 service " "action 0x%x", pkt->pkt_cdbp[1]); } break; case SCMD_RESERVE: case SCMD_RESERVE_G1: (void) bsd_scsi_reserve(pkt); break; case SCMD_RELEASE: case SCMD_RELEASE_G1: (void) bsd_scsi_release(pkt); break; case SCMD_REASSIGN_BLOCK: (void) bsd_scsi_reassign_block(pkt); break; case SCMD_READ_DEFECT_LIST: (void) bsd_scsi_read_defect_list(pkt); break; case SCMD_PRIN: case SCMD_PROUT: case SCMD_REPORT_LUNS: /* ASC 0x24 INVALID FIELD IN CDB */ emul64_check_cond(pkt, KEY_ILLEGAL_REQUEST, 0x24, 0x0); break; default: cmn_err(CE_WARN, "emul64: unrecognized " "SCSI cmd 0x%x", pkt->pkt_cdbp[0]); emul64_check_cond(pkt, KEY_ILLEGAL_REQUEST, 0x24, 0x0); break; case SCMD_GET_CONFIGURATION: case 0x35: /* SCMD_SYNCHRONIZE_CACHE */ /* Don't complain */ break; } } static void emul64_pkt_comp(void * arg) { struct scsi_pkt *pkt = (struct scsi_pkt *)arg; struct emul64_cmd *sp = PKT2CMD(pkt); emul64_tgt_t *tgt; EMUL64_MUTEX_ENTER(sp->cmd_emul64); tgt = find_tgt(sp->cmd_emul64, pkt->pkt_address.a_target, pkt->pkt_address.a_lun); EMUL64_MUTEX_EXIT(sp->cmd_emul64); if (!tgt) { pkt->pkt_reason = CMD_TIMEOUT; pkt->pkt_state = STATE_GOT_BUS | STATE_SENT_CMD; pkt->pkt_statistics = STAT_TIMEOUT; } else { pkt->pkt_reason = CMD_CMPLT; *pkt->pkt_scbp = STATUS_GOOD; pkt->pkt_state = STATE_GOT_BUS | STATE_GOT_TARGET | STATE_SENT_CMD | STATE_XFERRED_DATA | STATE_GOT_STATUS; pkt->pkt_statistics = 0; emul64_handle_cmd(pkt); } (*pkt->pkt_comp)(pkt); } /* ARGSUSED */ static int emul64_scsi_abort(struct scsi_address *ap, struct scsi_pkt *pkt) { return (1); } /* ARGSUSED */ static int emul64_scsi_reset(struct scsi_address *ap, int level) { return (1); } static int emul64_get_tgtrange(struct emul64 *emul64, intptr_t arg, emul64_tgt_t **tgtp, emul64_tgt_range_t *tgtr) { if (ddi_copyin((void *)arg, tgtr, sizeof (*tgtr), 0) != 0) { cmn_err(CE_WARN, "emul64: ioctl - copy in failed\n"); return (EFAULT); } EMUL64_MUTEX_ENTER(emul64); *tgtp = find_tgt(emul64, tgtr->emul64_target, tgtr->emul64_lun); EMUL64_MUTEX_EXIT(emul64); if (*tgtp == NULL) { cmn_err(CE_WARN, "emul64: ioctl - no target for %d,%d on %d", tgtr->emul64_target, tgtr->emul64_lun, ddi_get_instance(emul64->emul64_dip)); return (ENXIO); } return (0); } static int emul64_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp) { struct emul64 *emul64; int instance; int rv = 0; emul64_tgt_range_t tgtr; emul64_tgt_t *tgt; instance = MINOR2INST(getminor(dev)); emul64 = (struct emul64 *)ddi_get_soft_state(emul64_state, instance); if (emul64 == NULL) { cmn_err(CE_WARN, "emul64: ioctl - no softstate for %d\n", getminor(dev)); return (ENXIO); } switch (cmd) { case EMUL64_WRITE_OFF: rv = emul64_get_tgtrange(emul64, arg, &tgt, &tgtr); if (rv == 0) { rv = emul64_write_off(emul64, tgt, &tgtr); } break; case EMUL64_WRITE_ON: rv = emul64_get_tgtrange(emul64, arg, &tgt, &tgtr); if (rv == 0) { rv = emul64_write_on(emul64, tgt, &tgtr); } break; case EMUL64_ZERO_RANGE: rv = emul64_get_tgtrange(emul64, arg, &tgt, &tgtr); if (rv == 0) { mutex_enter(&tgt->emul64_tgt_blk_lock); rv = bsd_freeblkrange(tgt, &tgtr.emul64_blkrange); mutex_exit(&tgt->emul64_tgt_blk_lock); } break; default: rv = scsi_hba_ioctl(dev, cmd, arg, mode, credp, rvalp); break; } return (rv); } /* ARGSUSED */ static int emul64_write_off(struct emul64 *emul64, emul64_tgt_t *tgt, emul64_tgt_range_t *tgtr) { size_t blkcnt = tgtr->emul64_blkrange.emul64_blkcnt; emul64_nowrite_t *cur; emul64_nowrite_t *nowrite; emul64_rng_overlap_t overlap = O_NONE; emul64_nowrite_t **prev = NULL; diskaddr_t sb = tgtr->emul64_blkrange.emul64_sb; nowrite = emul64_nowrite_alloc(&tgtr->emul64_blkrange); /* Find spot in list */ rw_enter(&tgt->emul64_tgt_nw_lock, RW_WRITER); cur = emul64_find_nowrite(tgt, sb, blkcnt, &overlap, &prev); if (overlap == O_NONE) { /* Insert into list */ *prev = nowrite; nowrite->emul64_nwnext = cur; } rw_exit(&tgt->emul64_tgt_nw_lock); if (overlap == O_NONE) { if (emul64_collect_stats) { mutex_enter(&emul64_stats_mutex); emul64_nowrite_count++; mutex_exit(&emul64_stats_mutex); } } else { cmn_err(CE_WARN, "emul64: EMUL64_WRITE_OFF 0x%llx,0x%" PRIx64 "overlaps 0x%llx,0x%" PRIx64 "\n", nowrite->emul64_blocked.emul64_sb, nowrite->emul64_blocked.emul64_blkcnt, cur->emul64_blocked.emul64_sb, cur->emul64_blocked.emul64_blkcnt); emul64_nowrite_free(nowrite); return (EINVAL); } return (0); } /* ARGSUSED */ static int emul64_write_on(struct emul64 *emul64, emul64_tgt_t *tgt, emul64_tgt_range_t *tgtr) { size_t blkcnt = tgtr->emul64_blkrange.emul64_blkcnt; emul64_nowrite_t *cur; emul64_rng_overlap_t overlap = O_NONE; emul64_nowrite_t **prev = NULL; int rv = 0; diskaddr_t sb = tgtr->emul64_blkrange.emul64_sb; /* Find spot in list */ rw_enter(&tgt->emul64_tgt_nw_lock, RW_WRITER); cur = emul64_find_nowrite(tgt, sb, blkcnt, &overlap, &prev); if (overlap == O_SAME) { /* Remove from list */ *prev = cur->emul64_nwnext; } rw_exit(&tgt->emul64_tgt_nw_lock); switch (overlap) { case O_NONE: cmn_err(CE_WARN, "emul64: EMUL64_WRITE_ON 0x%llx,0x%lx " "range not found\n", sb, blkcnt); rv = ENXIO; break; case O_SAME: if (emul64_collect_stats) { mutex_enter(&emul64_stats_mutex); emul64_nowrite_count--; mutex_exit(&emul64_stats_mutex); } emul64_nowrite_free(cur); break; case O_OVERLAP: case O_SUBSET: cmn_err(CE_WARN, "emul64: EMUL64_WRITE_ON 0x%llx,0x%lx " "overlaps 0x%llx,0x%" PRIx64 "\n", sb, blkcnt, cur->emul64_blocked.emul64_sb, cur->emul64_blocked.emul64_blkcnt); rv = EINVAL; break; } return (rv); } static emul64_nowrite_t * emul64_find_nowrite(emul64_tgt_t *tgt, diskaddr_t sb, size_t blkcnt, emul64_rng_overlap_t *overlap, emul64_nowrite_t ***prevp) { emul64_nowrite_t *cur; emul64_nowrite_t **prev; /* Find spot in list */ *overlap = O_NONE; prev = &tgt->emul64_tgt_nowrite; cur = tgt->emul64_tgt_nowrite; while (cur != NULL) { *overlap = emul64_overlap(&cur->emul64_blocked, sb, blkcnt); if (*overlap != O_NONE) break; prev = &cur->emul64_nwnext; cur = cur->emul64_nwnext; } *prevp = prev; return (cur); } static emul64_nowrite_t * emul64_nowrite_alloc(emul64_range_t *range) { emul64_nowrite_t *nw; nw = kmem_zalloc(sizeof (*nw), KM_SLEEP); bcopy((void *) range, (void *) &nw->emul64_blocked, sizeof (nw->emul64_blocked)); return (nw); } static void emul64_nowrite_free(emul64_nowrite_t *nw) { kmem_free((void *) nw, sizeof (*nw)); } emul64_rng_overlap_t emul64_overlap(emul64_range_t *rng, diskaddr_t sb, size_t cnt) { if (rng->emul64_sb >= sb + cnt) return (O_NONE); if (rng->emul64_sb + rng->emul64_blkcnt <= sb) return (O_NONE); if ((rng->emul64_sb == sb) && (rng->emul64_blkcnt == cnt)) return (O_SAME); if ((sb >= rng->emul64_sb) && ((sb + cnt) <= (rng->emul64_sb + rng->emul64_blkcnt))) { return (O_SUBSET); } return (O_OVERLAP); } #include /* * Error logging, printing, and debug print routines */ /*VARARGS3*/ static void emul64_i_log(struct emul64 *emul64, int level, char *fmt, ...) { char buf[256]; va_list ap; va_start(ap, fmt); (void) vsnprintf(buf, sizeof (buf), fmt, ap); va_end(ap); scsi_log(emul64 ? emul64->emul64_dip : NULL, "emul64", level, "%s\n", buf); } #ifdef EMUL64DEBUG static void emul64_debug_dump_cdb(struct scsi_address *ap, struct scsi_pkt *pkt) { static char hex[] = "0123456789abcdef"; struct emul64 *emul64 = ADDR2EMUL64(ap); struct emul64_cmd *sp = PKT2CMD(pkt); uint8_t *cdb = pkt->pkt_cdbp; char buf [256]; char *p; int i; (void) snprintf(buf, sizeof (buf), "emul64%d: <%d,%d> ", ddi_get_instance(emul64->emul64_dip), ap->a_target, ap->a_lun); p = buf + strlen(buf); *p++ = '['; for (i = 0; i < sp->cmd_cdblen; i++, cdb++) { if (i != 0) *p++ = ' '; *p++ = hex[(*cdb >> 4) & 0x0f]; *p++ = hex[*cdb & 0x0f]; } *p++ = ']'; *p++ = '\n'; *p = 0; cmn_err(CE_CONT, buf); } #endif /* EMUL64DEBUG */