/* * 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 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* common defines */ #ifndef MIN #define MIN(x, y) ((x) < (y) ? (x) : (y)) #endif #ifndef MAX #define MAX(x, y) ((x) > (y) ? (x) : (y)) #endif #ifndef ABS #define ABS(x) ((x) < (0) ? (-(x)) : (x)) #endif #define LOMIOCALCTL_OLD _IOW('a', 4, ts_aldata_t) #define LOMIOCALSTATE_OLD _IOWR('a', 5, ts_aldata_t) #define PCP_CKSUM_ENABLE #define PCP_DEF_MTU_SZ 100 #define PCP_MAX_TRY_CNT 5 #define PCP_GLVC_SLEEP 5 #define PCP_COMM_TIMEOUT 0x10 #define PCP_IO_OP_READ (1) #define PCP_IO_OP_WRITE (2) #define PCP_IO_OP_PEEK (3) /* Error codes for 'status' field in response message header */ #define TSAL_PCP_ERROR (-1) #define TSAL_PCP_OK (0) /* message received okay */ /* * magic number for Platform Channel Protocol (PCP) * ~(rot13("PCP_") = 0xAFBCAFA0 * rot13 is a simple Caesar-cypher encryption that replaces each English letter * with the one 13 places forward or back along the alphabet. */ #define PCP_MAGIC_NUM (0xAFBCAFA0) /* Platform channel protocol versions. */ #define PCP_PROT_VER_1 1 /* defines for 'timeout' */ #define PCP_TO_NO_RESPONSE (0xFFFFFFFF) /* no response required */ #define PCP_TO_WAIT_FOREVER (0) /* wait forever..(in reality, */ /* it waits until glvc driver */ /* call returns; curently glvc */ /* calls are blocking calls. */ /* Message Types */ #define PCP_ALARM_CONTROL 15 #define PCP_ALARM_CONTROL_R 16 /* alarm_action */ #define PCP_ALARM_ENABLE 1 #define PCP_ALARM_DISABLE 2 #define PCP_ALARM_STATUS 3 /* alarm_id */ #define PCP_ALARM_CRITICAL 0 #define PCP_ALARM_MAJOR 1 #define PCP_ALARM_MINOR 2 #define PCP_ALARM_USER 3 /* alarm_state */ #define ALARM_STATE_ON 1 #define ALARM_STATE_OFF 2 #define ALARM_STATE_UNKNOWN 3 /* Status Types */ #define PCP_ALARM_OK (1) #define PCP_ALARM_ERROR (2) /* tsalarm service channel */ #define ALARM_CHANNEL "/devices/virtual-devices@100/telco-alarm@f:glvc" /* Driver state flags */ #define TSAL_OPENED 0x1 #define TSAL_IDENTED 0x2 /* * Platform Channel Request Message Header. */ typedef struct tsal_pcp_req_msg_hdr { uint32_t magic_num; /* magic number */ uint8_t proto_ver; /* version info for */ /* backward compatibility */ uint8_t msg_type; /* provided by user apps */ uint8_t sub_type; /* provided by user apps */ uint8_t rsvd_pad; /* padding bits */ uint32_t xid; /* transaction id */ uint32_t timeout; /* timeout in seconds */ uint32_t msg_len; /* length of request or response data */ uint16_t msg_cksum; /* 16-bit checksum of req msg data */ uint16_t hdr_cksum; /* 16-bit checksum of req hdr */ } tsal_pcp_req_msg_hdr_t; /* * Platform Channel Response Message Header. */ typedef struct tsal_pcp_resp_msg_hdr { uint32_t magic_num; /* magic number */ uint8_t proto_ver; /* version info for */ /* backward compatibility */ uint8_t msg_type; /* passed to user apps */ uint8_t sub_type; /* passed to user apps */ uint8_t rsvd_pad; /* for padding */ uint32_t xid; /* transaction id */ uint32_t timeout; /* timeout in seconds */ uint32_t msg_len; /* length of request or response data */ uint32_t status; /* response status */ uint16_t msg_cksum; /* 16-bit checksum of resp msg data */ uint16_t hdr_cksum; /* 16-bit checksum of resp hdr */ } tsal_pcp_resp_msg_hdr_t; /* * PCP user apps message format */ typedef struct tsal_pcp_msg { uint8_t msg_type; uint8_t sub_type; uint16_t rsvd_pad; uint32_t msg_len; void *msg_data; } tsal_pcp_msg_t; /* * alarm set/get request message */ typedef struct tsal_pcp_alarm_req { uint32_t alarm_id; uint32_t alarm_action; } tsal_pcp_alarm_req_t; /* * alarm set/get response message */ typedef struct tsal_pcp_alarm_resp { uint32_t status; uint32_t alarm_id; uint32_t alarm_state; } tsal_pcp_alarm_resp_t; /* * tsalarm driver soft structure */ typedef struct tsalarm_softc { ldi_handle_t lh; ldi_ident_t li; dev_info_t *dip; minor_t minor; int flags; kmutex_t mutex; uint32_t msg_xid; uint32_t mtu_size; uint8_t *read_head; uint8_t *read_tail; uint8_t *read_area; uint8_t *peek_area; uint8_t *peek_read_area; tsal_pcp_alarm_req_t *req_ptr; tsal_pcp_alarm_resp_t *resp_ptr; tsal_pcp_req_msg_hdr_t *req_msg_hdr; tsal_pcp_resp_msg_hdr_t *resp_msg_hdr; }tsalarm_softc_t; /* * Forward declarations. */ static int tsal_pcp_send_req_msg_hdr(tsalarm_softc_t *sc, tsal_pcp_req_msg_hdr_t *req_hdr); static int tsal_pcp_recv_resp_msg_hdr(tsalarm_softc_t *sc, tsal_pcp_resp_msg_hdr_t *resp_hdr); static int tsal_pcp_io_op(tsalarm_softc_t *sc, void *buf, int byte_cnt, int io_op); static int tsal_pcp_read(tsalarm_softc_t *sc, uint8_t *buf, int buf_len); static int tsal_pcp_write(tsalarm_softc_t *sc, uint8_t *buf, int buf_len); static int tsal_pcp_peek(tsalarm_softc_t *sc, uint8_t *buf, int buf_len); static int tsal_pcp_peek_read(tsalarm_softc_t *sc, uint8_t *buf, int buf_len); static int tsal_pcp_frame_error_handle(tsalarm_softc_t *sc); static int check_magic_byte_presence(tsalarm_softc_t *sc, int byte_cnt, uint8_t *byte_val, int *ispresent); static int tsal_pcp_send_recv(tsalarm_softc_t *sc, tsal_pcp_msg_t *req_msg, tsal_pcp_msg_t *resp_msg, uint32_t timeout); static uint32_t tsal_pcp_get_xid(tsalarm_softc_t *sc); static uint16_t checksum(uint16_t *addr, int32_t count); static int glvc_alarm_get(int alarm_type, int *alarm_state, tsalarm_softc_t *sc); static int glvc_alarm_set(int alarm_type, int new_state, tsalarm_softc_t *sc); #define getsoftc(minor) \ ((struct tsalarm_softc *)ddi_get_soft_state(statep, (minor))) /* * Driver entry points */ /* dev_ops and cb_ops entry point function declarations */ static int tsalarm_attach(dev_info_t *, ddi_attach_cmd_t); static int tsalarm_detach(dev_info_t *, ddi_detach_cmd_t); static int tsalarm_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **); static int tsalarm_open(dev_t *, int, int, cred_t *); static int tsalarm_close(dev_t, int, int, cred_t *); static int tsalarm_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); static struct cb_ops tsalarm_cb_ops = { tsalarm_open, /* open */ tsalarm_close, /* close */ nodev, /* strategy() */ nodev, /* print() */ nodev, /* dump() */ nodev, /* read() */ nodev, /* write() */ tsalarm_ioctl, /* ioctl() */ nodev, /* devmap() */ nodev, /* mmap() */ ddi_segmap, /* segmap() */ nochpoll, /* poll() */ ddi_prop_op, /* prop_op() */ NULL, /* cb_str */ D_NEW | D_MP /* cb_flag */ }; static struct dev_ops tsalarm_ops = { DEVO_REV, 0, /* ref count */ tsalarm_getinfo, /* getinfo() */ nulldev, /* identify() */ nulldev, /* probe() */ tsalarm_attach, /* attach() */ tsalarm_detach, /* detach */ nodev, /* reset */ &tsalarm_cb_ops, /* pointer to cb_ops structure */ (struct bus_ops *)NULL, nulldev, /* power() */ ddi_quiesce_not_needed, /* quiesce() */ }; /* * Loadable module support. */ extern struct mod_ops mod_driverops; static void *statep; static struct modldrv modldrv = { &mod_driverops, /* Type of module. This is a driver */ "tsalarm control driver", /* Name of the module */ &tsalarm_ops /* pointer to the dev_ops structure */ }; static struct modlinkage modlinkage = { MODREV_1, &modldrv, NULL }; int _init(void) { int e; if (e = ddi_soft_state_init(&statep, sizeof (struct tsalarm_softc), 1)) { return (e); } if ((e = mod_install(&modlinkage)) != 0) { ddi_soft_state_fini(&statep); } return (e); } int _fini(void) { int e; if ((e = mod_remove(&modlinkage)) != 0) { return (e); } ddi_soft_state_fini(&statep); return (DDI_SUCCESS); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } /* ARGSUSED */ static int tsalarm_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result) { int inst = getminor((dev_t)arg); int retval = DDI_SUCCESS; struct tsalarm_softc *softc; switch (cmd) { case DDI_INFO_DEVT2DEVINFO: if ((softc = getsoftc(inst)) == NULL) { *result = (void *)NULL; retval = DDI_FAILURE; } else { *result = (void *)softc->dip; } break; case DDI_INFO_DEVT2INSTANCE: *result = (void *)(uintptr_t)inst; break; default: retval = DDI_FAILURE; } return (retval); } static int tsalarm_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { int inst; struct tsalarm_softc *softc = NULL; switch (cmd) { case DDI_ATTACH: inst = ddi_get_instance(dip); /* * Allocate a soft state structure for this instance. */ if (ddi_soft_state_zalloc(statep, inst) != DDI_SUCCESS) { cmn_err(CE_WARN, "Failed to allocate memory"); goto attach_failed; } softc = getsoftc(inst); softc->dip = dip; softc->mtu_size = PCP_DEF_MTU_SZ; softc->msg_xid = 0; softc->read_area = NULL; softc->read_head = NULL; softc->read_tail = NULL; softc->req_ptr = NULL; softc->resp_ptr = NULL; mutex_init(&softc->mutex, NULL, MUTEX_DRIVER, NULL); /* * Create minor node. The minor device number, inst, has no * meaning. The model number above, which will be added to * the device's softc, is used to direct peculiar behavior. */ if (ddi_create_minor_node(dip, "lom", S_IFCHR, 0, DDI_PSEUDO, 0) == DDI_FAILURE) { goto attach_failed; } ddi_report_dev(dip); return (DDI_SUCCESS); case DDI_RESUME: return (DDI_SUCCESS); default: return (DDI_FAILURE); } attach_failed: /* Free soft state, if allocated. remove minor node if added earlier */ if (softc) { mutex_destroy(&softc->mutex); ddi_soft_state_free(statep, inst); } ddi_remove_minor_node(dip, NULL); return (DDI_FAILURE); } static int tsalarm_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) { int inst; struct tsalarm_softc *softc; switch (cmd) { case DDI_DETACH: inst = ddi_get_instance(dip); if ((softc = getsoftc(inst)) == NULL) return (DDI_FAILURE); /* * Free the soft state and remove minor node added earlier. */ ddi_remove_minor_node(dip, NULL); mutex_destroy(&softc->mutex); ddi_soft_state_free(statep, inst); return (DDI_SUCCESS); case DDI_SUSPEND: return (DDI_SUCCESS); default: return (DDI_FAILURE); } } /* ARGSUSED */ static int tsalarm_open(dev_t *devp, int flag, int otyp, cred_t *credp) { int rv, inst = getminor(*devp); struct tsalarm_softc *softc; glvc_xport_opt_op_t channel_op; int rval; softc = (struct tsalarm_softc *)getsoftc(inst); if (softc == NULL) { cmn_err(CE_WARN, "getsoftc failed\n"); return (EIO); } mutex_enter(&softc->mutex); rv = ldi_ident_from_dev(*devp, &softc->li); if (rv != 0) { cmn_err(CE_WARN, "ldi_ident_from_dev failed\n"); goto FAIL; } softc->flags |= TSAL_IDENTED; rv = ldi_open_by_name(ALARM_CHANNEL, FREAD | FWRITE, kcred, &softc->lh, softc->li); if (rv != 0) { cmn_err(CE_WARN, "ldi_open_by_name failed\n"); goto FAIL; } softc->flags |= TSAL_OPENED; /* Get the MTU of the target channel */ channel_op.op_sel = GLVC_XPORT_OPT_GET; channel_op.opt_sel = GLVC_XPORT_OPT_MTU_SZ; channel_op.opt_val = 0; if ((rv = ldi_ioctl(softc->lh, GLVC_XPORT_IOCTL_OPT_OP, (intptr_t)&channel_op, FKIOCTL, kcred, &rval)) < 0) { cmn_err(CE_WARN, "ldi_ioctl failed\n"); goto FAIL; } softc->mtu_size = channel_op.opt_val; if ((softc->req_ptr = (tsal_pcp_alarm_req_t *)kmem_zalloc( sizeof (tsal_pcp_alarm_req_t), KM_NOSLEEP)) == NULL) { goto FAIL; } if ((softc->resp_ptr = (tsal_pcp_alarm_resp_t *)kmem_zalloc( sizeof (tsal_pcp_alarm_resp_t), KM_NOSLEEP)) == NULL) { goto FAIL; } if ((softc->req_msg_hdr = (tsal_pcp_req_msg_hdr_t *)kmem_zalloc( sizeof (tsal_pcp_req_msg_hdr_t), KM_NOSLEEP)) == NULL) { goto FAIL; } if ((softc->resp_msg_hdr = (tsal_pcp_resp_msg_hdr_t *)kmem_zalloc( sizeof (tsal_pcp_resp_msg_hdr_t), KM_NOSLEEP)) == NULL) { goto FAIL; } if ((softc->peek_area = (uint8_t *)kmem_zalloc(softc->mtu_size, KM_NOSLEEP)) == NULL) { goto FAIL; } if ((softc->peek_read_area = (uint8_t *)kmem_zalloc(2*softc->mtu_size, KM_NOSLEEP)) == NULL) { goto FAIL; } rv = 0; FAIL: if (rv != 0) { if (softc->flags & TSAL_OPENED) (void) ldi_close(softc->lh, FREAD|FWRITE, credp); if (softc->flags & TSAL_IDENTED) (void) ldi_ident_release(softc->li); softc->flags &= ~(TSAL_OPENED | TSAL_IDENTED); if (softc->req_ptr != NULL) kmem_free(softc->req_ptr, sizeof (tsal_pcp_alarm_req_t)); if (softc->resp_ptr != NULL) kmem_free(softc->resp_ptr, sizeof (tsal_pcp_alarm_resp_t)); if (softc->req_msg_hdr != NULL) kmem_free(softc->req_msg_hdr, sizeof (tsal_pcp_req_msg_hdr_t)); if (softc->resp_msg_hdr != NULL) kmem_free(softc->resp_msg_hdr, sizeof (tsal_pcp_resp_msg_hdr_t)); if (softc->peek_area != NULL) kmem_free(softc->peek_area, softc->mtu_size); if (softc->peek_read_area != NULL) kmem_free(softc->peek_read_area, 2*softc->mtu_size); } mutex_exit(&softc->mutex); return (rv); } /* ARGSUSED */ static int tsalarm_close(dev_t dev, int flag, int otyp, cred_t *credp) { int rv, inst = getminor(dev); struct tsalarm_softc *softc; softc = (struct tsalarm_softc *)getsoftc(inst); if (softc == NULL) { return (EIO); } mutex_enter(&softc->mutex); rv = ldi_close(softc->lh, FREAD | FWRITE, kcred); if (rv != 0) { cmn_err(CE_WARN, "ldi_close failed \n"); } ldi_ident_release(softc->li); softc->flags &= ~(TSAL_OPENED | TSAL_IDENTED); mutex_exit(&softc->mutex); /* * free global buffers */ if (softc->read_area != NULL) { kmem_free(softc->read_area, 2*softc->mtu_size); softc->read_area = NULL; } if (softc->req_ptr != NULL) { kmem_free(softc->req_ptr, sizeof (tsal_pcp_alarm_req_t)); softc->req_ptr = NULL; } if (softc->resp_ptr != NULL) { kmem_free(softc->resp_ptr, sizeof (tsal_pcp_alarm_resp_t)); softc->resp_ptr = NULL; } if (softc->req_msg_hdr != NULL) { kmem_free(softc->req_msg_hdr, sizeof (tsal_pcp_req_msg_hdr_t)); softc->req_msg_hdr = NULL; } if (softc->resp_msg_hdr != NULL) { kmem_free(softc->resp_msg_hdr, sizeof (tsal_pcp_resp_msg_hdr_t)); softc->resp_msg_hdr = NULL; } if (softc->peek_area != NULL) { kmem_free(softc->peek_area, softc->mtu_size); softc->peek_area = NULL; } if (softc->peek_read_area != NULL) { kmem_free(softc->peek_read_area, 2*softc->mtu_size); softc->peek_read_area = NULL; } return (rv); } /* ARGSUSED */ static int tsalarm_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp) { int inst = getminor(dev); struct tsalarm_softc *softc; int retval = 0; ts_aldata_t ts_alinfo; int alarm_type, alarm_state = 0; if ((softc = getsoftc(inst)) == NULL) return (ENXIO); mutex_enter(&softc->mutex); switch (cmd) { case LOMIOCALSTATE: case LOMIOCALSTATE_OLD: { if (ddi_copyin((caddr_t)arg, (caddr_t)&ts_alinfo, sizeof (ts_aldata_t), mode) != 0) { retval = EFAULT; goto end; } alarm_type = ts_alinfo.alarm_no; if ((alarm_type < ALARM_CRITICAL) || (alarm_type > ALARM_USER)) { retval = EINVAL; goto end; } retval = glvc_alarm_get(alarm_type, &alarm_state, softc); if (retval != 0) goto end; if ((alarm_state != 0) && (alarm_state != 1)) { retval = EIO; goto end; } ts_alinfo.alarm_state = alarm_state; if (ddi_copyout((caddr_t)&ts_alinfo, (caddr_t)arg, sizeof (ts_aldata_t), mode) != 0) { retval = EFAULT; goto end; } } break; case LOMIOCALCTL: case LOMIOCALCTL_OLD: { if (ddi_copyin((caddr_t)arg, (caddr_t)&ts_alinfo, sizeof (ts_aldata_t), mode) != 0) { retval = EFAULT; goto end; } alarm_type = ts_alinfo.alarm_no; alarm_state = ts_alinfo.alarm_state; if ((alarm_type < ALARM_CRITICAL) || (alarm_type > ALARM_USER)) { retval = EINVAL; goto end; } if ((alarm_state < ALARM_OFF) || (alarm_state > ALARM_ON)) { retval = EINVAL; goto end; } retval = glvc_alarm_set(alarm_type, alarm_state, softc); } break; default: retval = EINVAL; break; } end: mutex_exit(&softc->mutex); return (retval); } static int glvc_alarm_get(int alarm_type, int *alarm_state, tsalarm_softc_t *sc) { tsal_pcp_alarm_req_t *req_ptr = NULL; tsal_pcp_alarm_resp_t *resp_ptr = NULL; tsal_pcp_msg_t send_msg; tsal_pcp_msg_t recv_msg; int status = -1; /* * setup the request data to attach to the libpcp msg */ if (sc->req_ptr == NULL) { goto alarm_return; } req_ptr = sc->req_ptr; req_ptr->alarm_action = PCP_ALARM_STATUS; req_ptr->alarm_id = alarm_type; send_msg.msg_type = PCP_ALARM_CONTROL; send_msg.sub_type = 0; send_msg.msg_len = sizeof (tsal_pcp_alarm_req_t); send_msg.msg_data = (uint8_t *)req_ptr; /* * send the request, receive the response */ if (tsal_pcp_send_recv(sc, &send_msg, &recv_msg, PCP_COMM_TIMEOUT) < 0) { /* we either timed out or erred; either way try again */ (void) delay(PCP_COMM_TIMEOUT * drv_usectohz(1000000)); if (tsal_pcp_send_recv(sc, &send_msg, &recv_msg, PCP_COMM_TIMEOUT) < 0) { cmn_err(CE_WARN, "tsalarm: communication failure"); goto alarm_return; } } /* * validate that this data was meant for us */ if (recv_msg.msg_type != PCP_ALARM_CONTROL_R) { cmn_err(CE_WARN, "tsalarm: unbound packet received"); goto alarm_return; } /* * verify that the Alarm action has taken place */ resp_ptr = (tsal_pcp_alarm_resp_t *)recv_msg.msg_data; if (resp_ptr->status == PCP_ALARM_ERROR) { cmn_err(CE_WARN, "tsalarm: failed to get alarm status"); goto alarm_return; } if (resp_ptr->alarm_state == ALARM_STATE_UNKNOWN) cmn_err(CE_WARN, "tsalarm: ALARM set to unknown state"); *alarm_state = resp_ptr->alarm_state; status = TSAL_PCP_OK; alarm_return: return (status); } static int glvc_alarm_set(int alarm_type, int new_state, tsalarm_softc_t *sc) { tsal_pcp_alarm_req_t *req_ptr = NULL; tsal_pcp_alarm_resp_t *resp_ptr = NULL; tsal_pcp_msg_t send_msg; tsal_pcp_msg_t recv_msg; int status = -1; /* * setup the request data to attach to the libpcp msg */ if (sc->req_ptr == NULL) { if ((sc->req_ptr = (tsal_pcp_alarm_req_t *)kmem_zalloc( sizeof (tsal_pcp_alarm_req_t), KM_NOSLEEP)) == NULL) goto alarm_return; } req_ptr = sc->req_ptr; if (new_state == ALARM_ON) req_ptr->alarm_action = PCP_ALARM_ENABLE; else if (new_state == ALARM_OFF) req_ptr->alarm_action = PCP_ALARM_DISABLE; req_ptr->alarm_id = alarm_type; send_msg.msg_type = PCP_ALARM_CONTROL; send_msg.sub_type = 0; send_msg.msg_len = sizeof (tsal_pcp_alarm_req_t); send_msg.msg_data = (uint8_t *)req_ptr; /* * send the request, receive the response */ if (tsal_pcp_send_recv(sc, &send_msg, &recv_msg, PCP_COMM_TIMEOUT) < 0) { /* we either timed out or erred; either way try again */ (void) delay(PCP_COMM_TIMEOUT * drv_usectohz(1000000)); if (tsal_pcp_send_recv(sc, &send_msg, &recv_msg, PCP_COMM_TIMEOUT) < 0) { goto alarm_return; } } /* * validate that this data was meant for us */ if (recv_msg.msg_type != PCP_ALARM_CONTROL_R) { cmn_err(CE_WARN, "tsalarm: unbound packet received"); goto alarm_return; } /* * verify that the Alarm action has taken place */ resp_ptr = (tsal_pcp_alarm_resp_t *)recv_msg.msg_data; if (resp_ptr->status == PCP_ALARM_ERROR) { cmn_err(CE_WARN, "tsalarm: failed to set alarm status"); goto alarm_return; } /* * ensure the Alarm action taken is the one requested */ if ((req_ptr->alarm_action == PCP_ALARM_DISABLE) && (resp_ptr->alarm_state != ALARM_STATE_OFF)) { cmn_err(CE_WARN, "tsalarm: failed to set alarm"); goto alarm_return; } else if ((req_ptr->alarm_action == PCP_ALARM_ENABLE) && (resp_ptr->alarm_state != ALARM_STATE_ON)) { cmn_err(CE_WARN, "tsalarm: failed to set alarm"); goto alarm_return; } else if (resp_ptr->alarm_state == ALARM_STATE_UNKNOWN) { cmn_err(CE_WARN, "tsalarm: Alarm set to unknown state"); goto alarm_return; } status = TSAL_PCP_OK; alarm_return: return (status); } /* * Function: Send and Receive messages on platform channel. * Arguments: * int channel_fd - channel file descriptor. * tsal_pcp_msg_t *req_msg - Request Message to send to other end of channel. * tsal_pcp_msg_t *resp_msg - Response Message to be received. * uint32_t timeout - timeout field when waiting for data from channel. * Returns: * 0 - success (TSAL_PCP_OK). * (-1) - failure (TSAL_PCP_ERROR). */ static int tsal_pcp_send_recv(tsalarm_softc_t *sc, tsal_pcp_msg_t *req_msg, tsal_pcp_msg_t *resp_msg, uint32_t timeout) { void *datap; void *resp_msg_data = NULL; uint32_t status; uint16_t cksum = 0; int ret; int resp_hdr_ok; tsal_pcp_req_msg_hdr_t *req_msg_hdr = NULL; tsal_pcp_resp_msg_hdr_t *resp_msg_hdr = NULL; #ifdef PCP_CKSUM_ENABLE uint16_t bkup_resp_hdr_cksum; #endif if (req_msg == NULL) { return (TSAL_PCP_ERROR); } if ((req_msg->msg_len != 0) && ((datap = req_msg->msg_data) == NULL)) return (TSAL_PCP_ERROR); req_msg_hdr = sc->req_msg_hdr; if (req_msg_hdr == NULL) return (TSAL_PCP_ERROR); if (req_msg->msg_len != 0) { /* calculate request msg_cksum */ cksum = checksum((uint16_t *)datap, req_msg->msg_len); } /* * Fill in the message header for the request packet */ req_msg_hdr->magic_num = PCP_MAGIC_NUM; req_msg_hdr->proto_ver = PCP_PROT_VER_1; req_msg_hdr->msg_type = req_msg->msg_type; req_msg_hdr->sub_type = req_msg->sub_type; req_msg_hdr->rsvd_pad = 0; req_msg_hdr->xid = tsal_pcp_get_xid(sc); req_msg_hdr->msg_len = req_msg->msg_len; req_msg_hdr->timeout = timeout; req_msg_hdr->msg_cksum = cksum; req_msg_hdr->hdr_cksum = 0; /* fill request header checksum */ req_msg_hdr->hdr_cksum = checksum((uint16_t *)req_msg_hdr, sizeof (tsal_pcp_req_msg_hdr_t)); /* * send request message header */ if ((ret = tsal_pcp_send_req_msg_hdr(sc, req_msg_hdr))) { return (ret); } /* * send request message */ if (req_msg->msg_len != 0) { if ((ret = tsal_pcp_io_op(sc, datap, req_msg->msg_len, PCP_IO_OP_WRITE))) { return (ret); } } if (timeout == (uint32_t)PCP_TO_NO_RESPONSE) return (TSAL_PCP_OK); resp_msg_hdr = sc->resp_msg_hdr; if (resp_msg_hdr == NULL) { return (TSAL_PCP_ERROR); } resp_hdr_ok = 0; while (!resp_hdr_ok) { /* * Receive response message header * Note: frame error handling is done in * 'tsal_pcp_recv_resp_msg_hdr()'. */ if ((ret = tsal_pcp_recv_resp_msg_hdr(sc, resp_msg_hdr))) { return (ret); } /* * Check header checksum if it matches with the received hdr * checksum. */ #ifdef PCP_CKSUM_ENABLE bkup_resp_hdr_cksum = resp_msg_hdr->hdr_cksum; resp_msg_hdr->hdr_cksum = 0; cksum = checksum((uint16_t *)resp_msg_hdr, sizeof (tsal_pcp_resp_msg_hdr_t)); if (cksum != bkup_resp_hdr_cksum) { return (TSAL_PCP_ERROR); } #endif /* * Check for matching request and response messages */ if (resp_msg_hdr->xid != req_msg_hdr->xid) { continue; /* continue reading response header */ } resp_hdr_ok = 1; } /* * check status field for any channel protocol errors * This field signifies something happend during request * message trasmission. This field is set by the receiver. */ status = resp_msg_hdr->status; if (status != TSAL_PCP_OK) { return (TSAL_PCP_ERROR); } if (resp_msg_hdr->msg_len != 0) { if (sc->resp_ptr == NULL) return (TSAL_PCP_ERROR); resp_msg_data = (uint8_t *)sc->resp_ptr; /* * Receive response message. */ if ((ret = tsal_pcp_io_op(sc, resp_msg_data, resp_msg_hdr->msg_len, PCP_IO_OP_READ))) { return (ret); } #ifdef PCP_CKSUM_ENABLE /* verify response message data checksum */ cksum = checksum((uint16_t *)resp_msg_data, resp_msg_hdr->msg_len); if (cksum != resp_msg_hdr->msg_cksum) { return (TSAL_PCP_ERROR); } #endif } /* Everything is okay put the received data into user */ /* resp_msg struct */ resp_msg->msg_len = resp_msg_hdr->msg_len; resp_msg->msg_type = resp_msg_hdr->msg_type; resp_msg->sub_type = resp_msg_hdr->sub_type; resp_msg->msg_data = (uint8_t *)resp_msg_data; return (TSAL_PCP_OK); } /* * Function: wrapper for handling glvc calls (read/write/peek). */ static int tsal_pcp_io_op(tsalarm_softc_t *sc, void *buf, int byte_cnt, int io_op) { int rv; int n; uint8_t *datap; int (*func_ptr)(tsalarm_softc_t *, uint8_t *, int); int io_sz; int try_cnt; if ((buf == NULL) || (byte_cnt < 0)) { return (TSAL_PCP_ERROR); } switch (io_op) { case PCP_IO_OP_READ: func_ptr = tsal_pcp_read; break; case PCP_IO_OP_WRITE: func_ptr = tsal_pcp_write; break; case PCP_IO_OP_PEEK: func_ptr = tsal_pcp_peek; break; default: return (TSAL_PCP_ERROR); } /* * loop until all I/O done, try limit exceded, or real failure */ rv = 0; datap = buf; while (rv < byte_cnt) { io_sz = MIN((byte_cnt - rv), sc->mtu_size); try_cnt = 0; while ((n = (*func_ptr)(sc, datap, io_sz)) < 0) { try_cnt++; if (try_cnt > PCP_MAX_TRY_CNT) { rv = n; goto done; } /* waiting 5 secs. Do we need 5 Secs? */ (void) delay(PCP_GLVC_SLEEP * drv_usectohz(1000000)); } /* while trying the io operation */ if (n < 0) { rv = n; goto done; } rv += n; datap += n; } /* while still have more data */ done: if (rv == byte_cnt) return (0); else return (TSAL_PCP_ERROR); } /* * For peeking 'bytes_cnt' bytes in channel (glvc) buffers. * If data is available, the data is copied into 'buf'. */ static int tsal_pcp_peek(tsalarm_softc_t *sc, uint8_t *buf, int bytes_cnt) { int ret, rval; glvc_xport_msg_peek_t peek_ctrl; int n, m; if (bytes_cnt < 0 || bytes_cnt > sc->mtu_size) { return (TSAL_PCP_ERROR); } /* * initialization of buffers used for peeking data in channel buffers. */ if (sc->peek_area == NULL) { return (TSAL_PCP_ERROR); } /* * peek max MTU size bytes */ peek_ctrl.buf = (caddr_t)sc->peek_area; peek_ctrl.buflen = sc->mtu_size; peek_ctrl.flags = 0; if ((ret = ldi_ioctl(sc->lh, GLVC_XPORT_IOCTL_DATA_PEEK, (intptr_t)&peek_ctrl, FKIOCTL, kcred, &rval)) < 0) { return (ret); } n = peek_ctrl.buflen; if (n < 0) return (TSAL_PCP_ERROR); /* * satisfy request as best as we can */ m = MIN(bytes_cnt, n); (void) memcpy(buf, sc->peek_area, m); return (m); } /* * Function: write 'byte_cnt' bytes from 'buf' to channel. */ static int tsal_pcp_write(tsalarm_softc_t *sc, uint8_t *buf, int byte_cnt) { int ret; struct uio uio; struct iovec iov; /* check for valid arguments */ if (buf == NULL || byte_cnt < 0 || byte_cnt > sc->mtu_size) { return (TSAL_PCP_ERROR); } bzero(&uio, sizeof (uio)); bzero(&iov, sizeof (iov)); iov.iov_base = (int8_t *)buf; iov.iov_len = byte_cnt; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_loffset = 0; uio.uio_segflg = UIO_SYSSPACE; uio.uio_resid = byte_cnt; if ((ret = ldi_write(sc->lh, &uio, kcred)) < 0) { return (ret); } return (byte_cnt - iov.iov_len); } /* * In current implementaion of glvc driver, streams reads are not supported. * tsal_pcp_read mimics stream reads by first reading all the bytes present in * channel buffer into a local buffer and from then on read requests * are serviced from local buffer. When read requests are not serviceble * from local buffer, it repeates by first reading data from channel buffers. */ static int tsal_pcp_read(tsalarm_softc_t *sc, uint8_t *buf, int byte_cnt) { int ret; int n, m, i; struct uio uio; struct iovec iov; int read_area_size = 0; if (byte_cnt < 0 || byte_cnt > sc->mtu_size) { return (TSAL_PCP_ERROR); } read_area_size = 2*sc->mtu_size; /* * initialization of local read buffer * from which the stream read requests are serviced. */ if (sc->read_area == NULL) { sc->read_area = (uint8_t *)kmem_zalloc(read_area_size, KM_NOSLEEP); if (sc->read_area == NULL) { return (TSAL_PCP_ERROR); } sc->read_head = sc->read_area; sc->read_tail = sc->read_area; } /* * if we already read this data then copy from local buffer it self * without calling new read. */ if (byte_cnt <= (sc->read_tail - sc->read_head)) { (void) memcpy(buf, sc->read_head, byte_cnt); sc->read_head += byte_cnt; return (byte_cnt); } /* * if the request is not satisfied from the buffered data, then move * remaining data to front of the buffer and read new data. */ for (i = 0; i < (sc->read_tail - sc->read_head); ++i) { sc->read_area[i] = sc->read_head[i]; } sc->read_head = sc->read_area; sc->read_tail = sc->read_head + i; /* * do a peek to see how much data is available and read complete data. */ if ((m = tsal_pcp_peek(sc, sc->read_tail, sc->mtu_size)) < 0) { return (m); } bzero(&uio, sizeof (uio)); bzero(&iov, sizeof (iov)); iov.iov_base = (int8_t *)sc->read_tail; iov.iov_len = m; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_loffset = 0; uio.uio_segflg = UIO_SYSSPACE; uio.uio_resid = m; if ((ret = ldi_read(sc->lh, &uio, kcred)) != 0) { return (ret); } sc->read_tail += (m - iov.iov_len); /* * copy the requested bytes. */ n = MIN(byte_cnt, (sc->read_tail - sc->read_head)); (void) memcpy(buf, sc->read_head, n); sc->read_head += n; return (n); } /* * This function is slight different from tsal_pcp_peek. The peek requests are * serviced from local read buffer, if data is available. If the peek request * is not serviceble from local read buffer, then the data is peeked from * channel buffer. This function is mainly used for proper protocol framing * error handling. */ static int tsal_pcp_peek_read(tsalarm_softc_t *sc, uint8_t *buf, int byte_cnt) { int n, m, i; uint8_t *peek_read_head = NULL; uint8_t *peek_read_tail = NULL; if (byte_cnt < 0 || byte_cnt > sc->mtu_size) { return (TSAL_PCP_ERROR); } /* * if we already have the data in local read buffer then copy * from local buffer it self w/out calling new peek */ if (byte_cnt <= (sc->read_tail - sc->read_head)) { (void) memcpy(buf, sc->read_head, byte_cnt); return (byte_cnt); } if (sc->peek_read_area == NULL) { return (TSAL_PCP_ERROR); } peek_read_head = sc->peek_read_area; peek_read_tail = sc->peek_read_area; /* * if the request is not satisfied from local read buffer, then first * copy the remaining data in local read buffer to peek_read_area and * then issue new peek. */ for (i = 0; i < (sc->read_tail - sc->read_head); ++i) { sc->peek_read_area[i] = sc->read_head[i]; } peek_read_head = sc->peek_read_area; peek_read_tail = peek_read_head + i; /* * do a peek to see how much data is available and read complete data. */ if ((m = tsal_pcp_peek(sc, peek_read_tail, sc->mtu_size)) < 0) { return (m); } peek_read_tail += m; /* * copy the requested bytes */ n = MIN(byte_cnt, (peek_read_tail - peek_read_head)); (void) memcpy(buf, peek_read_head, n); return (n); } /* * Send Request Message Header. */ static int tsal_pcp_send_req_msg_hdr(tsalarm_softc_t *sc, tsal_pcp_req_msg_hdr_t *req_hdr) { tsal_pcp_req_msg_hdr_t *hdrp; int hdr_sz; int ret; hdr_sz = sizeof (tsal_pcp_req_msg_hdr_t); if ((hdrp = (tsal_pcp_req_msg_hdr_t *)kmem_zalloc(hdr_sz, KM_NOSLEEP)) == NULL) { return (TSAL_PCP_ERROR); } hdrp->magic_num = htonl(req_hdr->magic_num); hdrp->proto_ver = req_hdr->proto_ver; hdrp->msg_type = req_hdr->msg_type; hdrp->sub_type = req_hdr->sub_type; hdrp->rsvd_pad = htons(req_hdr->rsvd_pad); hdrp->xid = htonl(req_hdr->xid); hdrp->timeout = htonl(req_hdr->timeout); hdrp->msg_len = htonl(req_hdr->msg_len); hdrp->msg_cksum = htons(req_hdr->msg_cksum); hdrp->hdr_cksum = htons(req_hdr->hdr_cksum); if ((ret = tsal_pcp_io_op(sc, (char *)hdrp, hdr_sz, PCP_IO_OP_WRITE)) != 0) { kmem_free(hdrp, hdr_sz); return (ret); } kmem_free(hdrp, hdr_sz); return (TSAL_PCP_OK); } /* * Receive Response message header. */ static int tsal_pcp_recv_resp_msg_hdr(tsalarm_softc_t *sc, tsal_pcp_resp_msg_hdr_t *resp_hdr) { uint32_t magic_num; uint8_t proto_ver; uint8_t msg_type; uint8_t sub_type; uint8_t rsvd_pad; uint32_t xid; uint32_t timeout; uint32_t msg_len; uint32_t status; uint16_t msg_cksum; uint16_t hdr_cksum; int ret; if (resp_hdr == NULL) { return (TSAL_PCP_ERROR); } /* * handle protocol framing errors. * tsal_pcp_frame_error_handle() returns when proper frame arrived * (magic seq) or if an error happens while reading data from * channel. */ if ((ret = tsal_pcp_frame_error_handle(sc)) != 0) { return (TSAL_PCP_ERROR); } /* read magic number first */ if ((ret = tsal_pcp_io_op(sc, &magic_num, sizeof (magic_num), PCP_IO_OP_READ)) != 0) { return (ret); } magic_num = ntohl(magic_num); if (magic_num != PCP_MAGIC_NUM) { return (TSAL_PCP_ERROR); } /* read version field */ if ((ret = tsal_pcp_io_op(sc, &proto_ver, sizeof (proto_ver), PCP_IO_OP_READ)) != 0) { return (ret); } /* check protocol version */ if (proto_ver != PCP_PROT_VER_1) { return (TSAL_PCP_ERROR); } /* Read message type */ if ((ret = tsal_pcp_io_op(sc, &msg_type, sizeof (msg_type), PCP_IO_OP_READ)) != 0) { return (ret); } /* Read message sub type */ if ((ret = tsal_pcp_io_op(sc, &sub_type, sizeof (sub_type), PCP_IO_OP_READ)) != 0) { return (ret); } /* Read rcvd_pad bits */ if ((ret = tsal_pcp_io_op(sc, &rsvd_pad, sizeof (rsvd_pad), PCP_IO_OP_READ)) != 0) { return (ret); } /* receive transaction id */ if ((ret = tsal_pcp_io_op(sc, &xid, sizeof (xid), PCP_IO_OP_READ)) != 0) { return (ret); } xid = ntohl(xid); /* receive timeout value */ if ((ret = tsal_pcp_io_op(sc, &timeout, sizeof (timeout), PCP_IO_OP_READ)) != 0) { return (ret); } timeout = ntohl(timeout); /* receive message length */ if ((ret = tsal_pcp_io_op(sc, &msg_len, sizeof (msg_len), PCP_IO_OP_READ)) != 0) { return (ret); } msg_len = ntohl(msg_len); /* receive status field */ if ((ret = tsal_pcp_io_op(sc, &status, sizeof (status), PCP_IO_OP_READ)) != 0) { return (ret); } status = ntohl(status); /* receive message checksum */ if ((ret = tsal_pcp_io_op(sc, &msg_cksum, sizeof (msg_cksum), PCP_IO_OP_READ)) != 0) { return (ret); } msg_cksum = ntohs(msg_cksum); /* receive header checksum */ if ((ret = tsal_pcp_io_op(sc, &hdr_cksum, sizeof (hdr_cksum), PCP_IO_OP_READ)) != 0) { return (ret); } hdr_cksum = ntohs(hdr_cksum); /* copy to resp_hdr */ resp_hdr->magic_num = magic_num; resp_hdr->proto_ver = proto_ver; resp_hdr->msg_type = msg_type; resp_hdr->sub_type = sub_type; resp_hdr->rsvd_pad = rsvd_pad; resp_hdr->xid = xid; resp_hdr->timeout = timeout; resp_hdr->msg_len = msg_len; resp_hdr->status = status; resp_hdr->msg_cksum = msg_cksum; resp_hdr->hdr_cksum = hdr_cksum; return (TSAL_PCP_OK); } /* * Get next xid for including in request message. * Every request and response message are matched * for same xid. */ static uint32_t tsal_pcp_get_xid(tsalarm_softc_t *sc) { uint32_t ret; static boolean_t xid_initialized = B_FALSE; if (xid_initialized == B_FALSE) { xid_initialized = B_TRUE; /* * starting xid is initialized to a different value everytime * user application is restarted so that user apps will not * receive previous session's packets. * * Note: The algorithm for generating initial xid is partially * taken from Solaris rpc code. */ sc->msg_xid = (uint32_t)gethrtime(); } ret = sc->msg_xid++; /* zero xid is not allowed */ if (ret == 0) ret = sc->msg_xid++; return (ret); } /* * This function handles channel framing errors. It waits until proper * frame with starting sequence as magic numder (0xAFBCAFA0) * is arrived. It removes unexpected data (before the magic number sequence) * on the channel. It returns when proper magic number sequence is seen * or when any failure happens while reading/peeking the channel. */ static int tsal_pcp_frame_error_handle(tsalarm_softc_t *sc) { uint8_t magic_num_buf[4]; int ispresent = 0; uint32_t net_magic_num; /* magic byte in network byte order */ uint32_t host_magic_num = PCP_MAGIC_NUM; uint8_t buf[2]; net_magic_num = htonl(host_magic_num); (void) memcpy(magic_num_buf, (uint8_t *)&net_magic_num, 4); while (!ispresent) { /* * Check if next four bytes matches pcp magic number. * if mathing not found, discard 1 byte and continue checking. */ if (!check_magic_byte_presence(sc, 4, &magic_num_buf[0], &ispresent)) { if (!ispresent) { /* remove 1 byte */ (void) tsal_pcp_io_op(sc, buf, 1, PCP_IO_OP_READ); } } else { return (-1); } } return (0); } /* * checks whether certain byte sequence is present in the data stream. */ static int check_magic_byte_presence(tsalarm_softc_t *sc, int byte_cnt, uint8_t *byte_seq, int *ispresent) { int ret, i; uint8_t buf[4]; if ((ret = tsal_pcp_peek_read(sc, buf, byte_cnt)) < 0) { return (ret); } /* 'byte_cnt' bytes not present */ if (ret != byte_cnt) { *ispresent = 0; return (0); } for (i = 0; i < byte_cnt; ++i) { if (buf[i] != byte_seq[i]) { *ispresent = 0; return (0); } } *ispresent = 1; return (0); } /* * 16-bit simple internet checksum */ static uint16_t checksum(uint16_t *addr, int32_t count) { /* * Compute Internet Checksum for "count" bytes * beginning at location "addr". */ register uint32_t sum = 0; while (count > 1) { /* This is the inner loop */ sum += *(unsigned short *)addr++; count -= 2; } /* Add left-over byte, if any */ if (count > 0) sum += * (unsigned char *)addr; /* Fold 32-bit sum to 16 bits */ while (sum >> 16) sum = (sum & 0xffff) + (sum >> 16); sum = (~sum) & 0xffff; if (sum == 0) sum = 0xffff; return (sum); }