- u_long flags;
-
- ahd_lock(ahd, &flags);
- del_timer(&ahd->platform_data->completeq_timer);
- ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER;
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &flags);
-}
-
-static void
-ahd_linux_start_dv(struct ahd_softc *ahd)
-{
-
- /*
- * Freeze the simq and signal ahd_linux_queue to not let any
- * more commands through
- */
- if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) {
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s: Starting DV\n", ahd_name(ahd));
-#endif
-
- ahd->platform_data->flags |= AHD_DV_ACTIVE;
- ahd_freeze_simq(ahd);
-
- /* Wake up the DV kthread */
- up(&ahd->platform_data->dv_sem);
- }
-}
-
-static int
-ahd_linux_dv_thread(void *data)
-{
- struct ahd_softc *ahd;
- int target;
- u_long s;
-
- ahd = (struct ahd_softc *)data;
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("In DV Thread\n");
-#endif
-
- /*
- * Complete thread creation.
- */
- lock_kernel();
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60)
- /*
- * Don't care about any signals.
- */
- siginitsetinv(¤t->blocked, 0);
-
- daemonize();
- sprintf(current->comm, "ahd_dv_%d", ahd->unit);
-#else
- daemonize("ahd_dv_%d", ahd->unit);
- current->flags |= PF_FREEZE;
-#endif
- unlock_kernel();
-
- while (1) {
- /*
- * Use down_interruptible() rather than down() to
- * avoid inclusion in the load average.
- */
- down_interruptible(&ahd->platform_data->dv_sem);
-
- /* Check to see if we've been signaled to exit */
- ahd_lock(ahd, &s);
- if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) {
- ahd_unlock(ahd, &s);
- break;
- }
- ahd_unlock(ahd, &s);
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s: Beginning Domain Validation\n",
- ahd_name(ahd));
-#endif
-
- /*
- * Wait for any pending commands to drain before proceeding.
- */
- ahd_lock(ahd, &s);
- while (LIST_FIRST(&ahd->pending_scbs) != NULL) {
- ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY;
- ahd_unlock(ahd, &s);
- down_interruptible(&ahd->platform_data->dv_sem);
- ahd_lock(ahd, &s);
- }
-
- /*
- * Wait for the SIMQ to be released so that DV is the
- * only reason the queue is frozen.
- */
- while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
- ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
- ahd_unlock(ahd, &s);
- down_interruptible(&ahd->platform_data->dv_sem);
- ahd_lock(ahd, &s);
- }
- ahd_unlock(ahd, &s);
-
- for (target = 0; target < AHD_NUM_TARGETS; target++)
- ahd_linux_dv_target(ahd, target);
-
- ahd_lock(ahd, &s);
- ahd->platform_data->flags &= ~AHD_DV_ACTIVE;
- ahd_unlock(ahd, &s);
-
- /*
- * Release the SIMQ so that normal commands are
- * allowed to continue on the bus.
- */
- ahd_release_simq(ahd);
- }
- up(&ahd->platform_data->eh_sem);
- return (0);
-}
-
-static void
-ahd_linux_kill_dv_thread(struct ahd_softc *ahd)
-{
- u_long s;
-
- ahd_lock(ahd, &s);
- if (ahd->platform_data->dv_pid != 0) {
- ahd->platform_data->flags |= AHD_DV_SHUTDOWN;
- ahd_unlock(ahd, &s);
- up(&ahd->platform_data->dv_sem);
-
- /*
- * Use the eh_sem as an indicator that the
- * dv thread is exiting. Note that the dv
- * thread must still return after performing
- * the up on our semaphore before it has
- * completely exited this module. Unfortunately,
- * there seems to be no easy way to wait for the
- * exit of a thread for which you are not the
- * parent (dv threads are parented by init).
- * Cross your fingers...
- */
- down(&ahd->platform_data->eh_sem);
-
- /*
- * Mark the dv thread as already dead. This
- * avoids attempting to kill it a second time.
- * This is necessary because we must kill the
- * DV thread before calling ahd_free() in the
- * module shutdown case to avoid bogus locking
- * in the SCSI mid-layer, but we ahd_free() is
- * called without killing the DV thread in the
- * instance detach case, so ahd_platform_free()
- * calls us again to verify that the DV thread
- * is dead.
- */
- ahd->platform_data->dv_pid = 0;
- } else {
- ahd_unlock(ahd, &s);
- }
-}
-
-#define AHD_LINUX_DV_INQ_SHORT_LEN 36
-#define AHD_LINUX_DV_INQ_LEN 256
-#define AHD_LINUX_DV_TIMEOUT (HZ / 4)
-
-#define AHD_SET_DV_STATE(ahd, targ, newstate) \
- ahd_set_dv_state(ahd, targ, newstate, __LINE__)
-
-static __inline void
-ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ,
- ahd_dv_state newstate, u_int line)
-{
- ahd_dv_state oldstate;
-
- oldstate = targ->dv_state;
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s:%d: Going from state %d to state %d\n",
- ahd_name(ahd), line, oldstate, newstate);
-#endif
-
- if (oldstate == newstate)
- targ->dv_state_retry++;
- else
- targ->dv_state_retry = 0;
- targ->dv_state = newstate;
-}
-
-static void
-ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset)
-{
- struct ahd_devinfo devinfo;
- struct ahd_linux_target *targ;
- struct scsi_cmnd *cmd;
- struct scsi_device *scsi_dev;
- struct scsi_sense_data *sense;
- uint8_t *buffer;
- u_long s;
- u_int timeout;
- int echo_size;
-
- sense = NULL;
- buffer = NULL;
- echo_size = 0;
- ahd_lock(ahd, &s);
- targ = ahd->platform_data->targets[target_offset];
- if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) {
- ahd_unlock(ahd, &s);
- return;
- }
- ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0,
- targ->channel + 'A', ROLE_INITIATOR);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, &devinfo);
- printf("Performing DV\n");
- }
-#endif
-
- ahd_unlock(ahd, &s);
-
- cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
- scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
- scsi_dev->host = ahd->platform_data->host;
- scsi_dev->id = devinfo.target;
- scsi_dev->lun = devinfo.lun;
- scsi_dev->channel = devinfo.channel - 'A';
- ahd->platform_data->dv_scsi_dev = scsi_dev;
-
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC);
-
- while (targ->dv_state != AHD_DV_STATE_EXIT) {
- timeout = AHD_LINUX_DV_TIMEOUT;
- switch (targ->dv_state) {
- case AHD_DV_STATE_INQ_SHORT_ASYNC:
- case AHD_DV_STATE_INQ_ASYNC:
- case AHD_DV_STATE_INQ_ASYNC_VERIFY:
- /*
- * Set things to async narrow to reduce the
- * chance that the INQ will fail.
- */
- ahd_lock(ahd, &s);
- ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
- AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
- AHD_TRANS_GOAL, /*paused*/FALSE);
- ahd_unlock(ahd, &s);
- timeout = 10 * HZ;
- targ->flags &= ~AHD_INQ_VALID;
- /* FALLTHROUGH */
- case AHD_DV_STATE_INQ_VERIFY:
- {
- u_int inq_len;
-
- if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC)
- inq_len = AHD_LINUX_DV_INQ_SHORT_LEN;
- else
- inq_len = targ->inq_data->additional_length + 5;
- ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len);
- break;
- }
- case AHD_DV_STATE_TUR:
- case AHD_DV_STATE_BUSY:
- timeout = 5 * HZ;
- ahd_linux_dv_tur(ahd, cmd, &devinfo);
- break;
- case AHD_DV_STATE_REBD:
- ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ);
- break;
- case AHD_DV_STATE_WEB:
- ahd_linux_dv_web(ahd, cmd, &devinfo, targ);
- break;
-
- case AHD_DV_STATE_REB:
- ahd_linux_dv_reb(ahd, cmd, &devinfo, targ);
- break;
-
- case AHD_DV_STATE_SU:
- ahd_linux_dv_su(ahd, cmd, &devinfo, targ);
- timeout = 50 * HZ;
- break;
-
- default:
- ahd_print_devinfo(ahd, &devinfo);
- printf("Unknown DV state %d\n", targ->dv_state);
- goto out;
- }
-
- /* Queue the command and wait for it to complete */
- /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
- init_timer(&cmd->eh_timeout);
-#ifdef AHD_DEBUG
- if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
- /*
- * All of the printfs during negotiation
- * really slow down the negotiation.
- * Add a bit of time just to be safe.
- */
- timeout += HZ;
-#endif
- scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout);
- /*
- * In 2.5.X, it is assumed that all calls from the
- * "midlayer" (which we are emulating) will have the
- * ahd host lock held. For other kernels, the
- * io_request_lock must be held.
- */
-#if AHD_SCSI_HAS_HOST_LOCK != 0
- ahd_lock(ahd, &s);
-#else
- spin_lock_irqsave(&io_request_lock, s);
-#endif
- ahd_linux_queue(cmd, ahd_linux_dv_complete);
-#if AHD_SCSI_HAS_HOST_LOCK != 0
- ahd_unlock(ahd, &s);
-#else
- spin_unlock_irqrestore(&io_request_lock, s);
-#endif
- down_interruptible(&ahd->platform_data->dv_cmd_sem);
- /*
- * Wait for the SIMQ to be released so that DV is the
- * only reason the queue is frozen.
- */
- ahd_lock(ahd, &s);
- while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
- ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
- ahd_unlock(ahd, &s);
- down_interruptible(&ahd->platform_data->dv_sem);
- ahd_lock(ahd, &s);
- }
- ahd_unlock(ahd, &s);
-
- ahd_linux_dv_transition(ahd, cmd, &devinfo, targ);
- }
-
-out:
- if ((targ->flags & AHD_INQ_VALID) != 0
- && ahd_linux_get_device(ahd, devinfo.channel - 'A',
- devinfo.target, devinfo.lun,
- /*alloc*/FALSE) == NULL) {
- /*
- * The DV state machine failed to configure this device.
- * This is normal if DV is disabled. Since we have inquiry
- * data, filter it and use the "optimistic" negotiation
- * parameters found in the inquiry string.
- */
- ahd_linux_filter_inquiry(ahd, &devinfo);
- if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) {
- ahd_print_devinfo(ahd, &devinfo);
- printf("DV failed to configure device. "
- "Please file a bug report against "
- "this driver.\n");
- }
- }
-
- if (cmd != NULL)
- free(cmd, M_DEVBUF);
-
- if (ahd->platform_data->dv_scsi_dev != NULL) {
- free(ahd->platform_data->dv_scsi_dev, M_DEVBUF);
- ahd->platform_data->dv_scsi_dev = NULL;
- }
-
- ahd_lock(ahd, &s);
- if (targ->dv_buffer != NULL) {
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = NULL;
- }
- if (targ->dv_buffer1 != NULL) {
- free(targ->dv_buffer1, M_DEVBUF);
- targ->dv_buffer1 = NULL;
- }
- targ->flags &= ~AHD_DV_REQUIRED;
- if (targ->refcount == 0)
- ahd_linux_free_target(ahd, targ);
- ahd_unlock(ahd, &s);
-}
-
-static __inline int
-ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
- u_long s;
- int retval;
-
- ahd_lock(ahd, &s);
- retval = ahd_linux_fallback(ahd, devinfo);
- ahd_unlock(ahd, &s);
-
- return (retval);
-}
-
-static void
-ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ)
-{
- u_int32_t status;
-
- status = aic_error_action(cmd, targ->inq_data,
- ahd_cmd_get_transaction_status(cmd),
- ahd_cmd_get_scsi_status(cmd));
-
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Entering ahd_linux_dv_transition, state= %d, "
- "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
- status, cmd->result);
- }
-#endif
-
- switch (targ->dv_state) {
- case AHD_DV_STATE_INQ_SHORT_ASYNC:
- case AHD_DV_STATE_INQ_ASYNC:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ)
- targ->dv_state_retry--;
- if ((status & SS_ERRMASK) == EBUSY)
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- if (targ->dv_state_retry < 10)
- break;
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Failed DV inquiry, skipping\n");
- }
-#endif
- break;
- }
- break;
- case AHD_DV_STATE_INQ_ASYNC_VERIFY:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
- u_int xportflags;
- u_int spi3data;
-
- if (memcmp(targ->inq_data, targ->dv_buffer,
- AHD_LINUX_DV_INQ_LEN) != 0) {
- /*
- * Inquiry data must have changed.
- * Try from the top again.
- */
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- }
-
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
- targ->flags |= AHD_INQ_VALID;
- if (ahd_linux_user_dv_setting(ahd) == 0)
- break;
-
- xportflags = targ->inq_data->flags;
- if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
- break;
-
- spi3data = targ->inq_data->spi3data;
- switch (spi3data & SID_SPI_CLOCK_DT_ST) {
- default:
- case SID_SPI_CLOCK_ST:
- /* Assume only basic DV is supported. */
- targ->flags |= AHD_BASIC_DV;
- break;
- case SID_SPI_CLOCK_DT:
- case SID_SPI_CLOCK_DT_ST:
- targ->flags |= AHD_ENHANCED_DV;
- break;
- }
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ)
- targ->dv_state_retry--;
-
- if ((status & SS_ERRMASK) == EBUSY)
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- if (targ->dv_state_retry < 10)
- break;
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Failed DV inquiry, skipping\n");
- }
-#endif
- break;
- }
- break;
- case AHD_DV_STATE_INQ_VERIFY:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
-
- if (memcmp(targ->inq_data, targ->dv_buffer,
- AHD_LINUX_DV_INQ_LEN) == 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- int i;
-
- ahd_print_devinfo(ahd, devinfo);
- printf("Inquiry buffer mismatch:");
- for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) {
- if ((i & 0xF) == 0)
- printf("\n ");
- printf("0x%x:0x0%x ",
- ((uint8_t *)targ->inq_data)[i],
- targ->dv_buffer[i]);
- }
- printf("\n");
- }
-#endif
-
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- } else if ((status & SS_ERRMASK) == EBUSY)
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- if (targ->dv_state_retry < 10)
- break;
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Failed DV inquiry, skipping\n");
- }
-#endif
- break;
- }
- break;
-
- case AHD_DV_STATE_TUR:
- switch (status & SS_MASK) {
- case SS_NOP:
- if ((targ->flags & AHD_BASIC_DV) != 0) {
- ahd_linux_filter_inquiry(ahd, devinfo);
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_VERIFY);
- } else if ((targ->flags & AHD_ENHANCED_DV) != 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD);
- } else {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- }
- break;
- case SS_RETRY:
- case SS_TUR:
- if ((status & SS_ERRMASK) == EBUSY) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
- break;
- }
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- }
- if (targ->dv_state_retry >= 10) {
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV TUR reties exhausted\n");
- }
-#endif
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- if (status & SSQ_DELAY)
- ssleep(1);
-
- break;
- case SS_START:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU);
- break;
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- case AHD_DV_STATE_REBD:
- switch (status & SS_MASK) {
- case SS_NOP:
- {
- uint32_t echo_size;
-
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
- echo_size = scsi_3btoul(&targ->dv_buffer[1]);
- echo_size &= 0x1FFF;
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Echo buffer size= %d\n", echo_size);
- }
-#endif
- if (echo_size == 0) {
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
-
- /* Generate the buffer pattern */
- targ->dv_echo_size = echo_size;
- ahd_linux_generate_dv_pattern(targ);
- /*
- * Setup initial negotiation values.
- */
- ahd_linux_filter_inquiry(ahd, devinfo);
- break;
- }
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ)
- targ->dv_state_retry--;
- if (targ->dv_state_retry <= 10)
- break;
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV REBD reties exhausted\n");
- }
-#endif
- /* FALLTHROUGH */
- case SS_FATAL:
- default:
- /*
- * Setup initial negotiation values
- * and try level 1 DV.
- */
- ahd_linux_filter_inquiry(ahd, devinfo);
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY);
- targ->dv_echo_size = 0;
- break;
- }
- break;
-
- case AHD_DV_STATE_WEB:
- switch (status & SS_MASK) {
- case SS_NOP:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB);
- break;
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
- /*
- * Do not count "falling back"
- * against our retries.
- */
- targ->dv_state_retry = 0;
- }
- if (targ->dv_state_retry <= 10)
- break;
- /* FALLTHROUGH */
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV WEB reties exhausted\n");
- }
-#endif
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- case AHD_DV_STATE_REB:
- switch (status & SS_MASK) {
- case SS_NOP:
- if (memcmp(targ->dv_buffer, targ->dv_buffer1,
- targ->dv_echo_size) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0)
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- else
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_WEB);
- break;
- }
-
- if (targ->dv_buffer != NULL) {
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = NULL;
- }
- if (targ->dv_buffer1 != NULL) {
- free(targ->dv_buffer1, M_DEVBUF);
- targ->dv_buffer1 = NULL;
- }
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if ((status & SSQ_FALLBACK) != 0) {
- if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_EXIT);
- break;
- }
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
- }
- if (targ->dv_state_retry <= 10) {
- if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
- msleep(ahd->our_id*1000/10);
- break;
- }
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV REB reties exhausted\n");
- }
-#endif
- /* FALLTHROUGH */
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- case AHD_DV_STATE_SU:
- switch (status & SS_MASK) {
- case SS_NOP:
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- case AHD_DV_STATE_BUSY:
- switch (status & SS_MASK) {
- case SS_NOP:
- case SS_INQ_REFRESH:
- AHD_SET_DV_STATE(ahd, targ,
- AHD_DV_STATE_INQ_SHORT_ASYNC);
- break;
- case SS_TUR:
- case SS_RETRY:
- AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
- if (ahd_cmd_get_transaction_status(cmd)
- == CAM_REQUEUE_REQ) {
- targ->dv_state_retry--;
- } else if (targ->dv_state_retry < 60) {
- if ((status & SSQ_DELAY) != 0)
- ssleep(1);
- } else {
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("DV BUSY reties exhausted\n");
- }
-#endif
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- }
- break;
- default:
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
- break;
-
- default:
- printf("%s: Invalid DV completion state %d\n", ahd_name(ahd),
- targ->dv_state);
- AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
- break;
- }
-}
-
-static void
-ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo)
-{
- memset(cmd, 0, sizeof(struct scsi_cmnd));
- cmd->device = ahd->platform_data->dv_scsi_dev;
- cmd->scsi_done = ahd_linux_dv_complete;
-}
-
-/*
- * Synthesize an inquiry command. On the return trip, it'll be
- * sniffed and the device transfer settings set for us.
- */
-static void
-ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ,
- u_int request_length)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending INQ\n");
- }
-#endif
- if (targ->inq_data == NULL)
- targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN,
- M_DEVBUF, M_WAITOK);
- if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) {
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN,
- M_DEVBUF, M_WAITOK);
- }
-
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = SCSI_DATA_READ;
- cmd->cmd_len = 6;
- cmd->cmnd[0] = INQUIRY;
- cmd->cmnd[4] = request_length;
- cmd->request_bufflen = request_length;
- if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC)
- cmd->request_buffer = targ->dv_buffer;
- else
- cmd->request_buffer = targ->inq_data;
- memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN);
-}
-
-static void
-ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending TUR\n");
- }
-#endif
- /* Do a TUR to clear out any non-fatal transitional state */
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = SCSI_DATA_NONE;
- cmd->cmd_len = 6;
- cmd->cmnd[0] = TEST_UNIT_READY;
-}
-
-#define AHD_REBD_LEN 4
-
-static void
-ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending REBD\n");
- }
-#endif
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK);
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = SCSI_DATA_READ;
- cmd->cmd_len = 10;
- cmd->cmnd[0] = READ_BUFFER;
- cmd->cmnd[1] = 0x0b;
- scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]);
- cmd->request_bufflen = AHD_REBD_LEN;
- cmd->underflow = cmd->request_bufflen;
- cmd->request_buffer = targ->dv_buffer;
-}
-
-static void
-ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending WEB\n");
- }
-#endif
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = SCSI_DATA_WRITE;
- cmd->cmd_len = 10;
- cmd->cmnd[0] = WRITE_BUFFER;
- cmd->cmnd[1] = 0x0a;
- scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
- cmd->request_bufflen = targ->dv_echo_size;
- cmd->underflow = cmd->request_bufflen;
- cmd->request_buffer = targ->dv_buffer;
-}
-
-static void
-ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
-{
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending REB\n");
- }
-#endif
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = SCSI_DATA_READ;
- cmd->cmd_len = 10;
- cmd->cmnd[0] = READ_BUFFER;
- cmd->cmnd[1] = 0x0a;
- scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
- cmd->request_bufflen = targ->dv_echo_size;
- cmd->underflow = cmd->request_bufflen;
- cmd->request_buffer = targ->dv_buffer1;
-}
-
-static void
-ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
- struct ahd_devinfo *devinfo,
- struct ahd_linux_target *targ)
-{
- u_int le;
-
- le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Sending SU\n");
- }
-#endif
- ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
- cmd->sc_data_direction = SCSI_DATA_NONE;
- cmd->cmd_len = 6;
- cmd->cmnd[0] = START_STOP_UNIT;
- cmd->cmnd[4] = le | SSS_START;
-}
-
-static int
-ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
- struct ahd_linux_target *targ;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_transinfo *goal;
- struct ahd_tmode_tstate *tstate;
- u_int width;
- u_int period;
- u_int offset;
- u_int ppr_options;
- u_int cur_speed;
- u_int wide_speed;
- u_int narrow_speed;
- u_int fallback_speed;
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- ahd_print_devinfo(ahd, devinfo);
- printf("Trying to fallback\n");
- }
-#endif
- targ = ahd->platform_data->targets[devinfo->target_offset];
- tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
- devinfo->our_scsiid,
- devinfo->target, &tstate);
- goal = &tinfo->goal;
- width = goal->width;
- period = goal->period;
- offset = goal->offset;
- ppr_options = goal->ppr_options;
- if (offset == 0)
- period = AHD_ASYNC_XFER_PERIOD;
- if (targ->dv_next_narrow_period == 0)
- targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2);
- if (targ->dv_next_wide_period == 0)
- targ->dv_next_wide_period = period;
- if (targ->dv_max_width == 0)
- targ->dv_max_width = width;
- if (targ->dv_max_ppr_options == 0)
- targ->dv_max_ppr_options = ppr_options;
- if (targ->dv_last_ppr_options == 0)
- targ->dv_last_ppr_options = ppr_options;
-
- cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN);
- wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
- targ->dv_next_wide_period,
- MAX_OFFSET, AHD_SYNCRATE_MIN);
- narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
- targ->dv_next_narrow_period,
- MAX_OFFSET, AHD_SYNCRATE_MIN);
- fallback_speed = aic_calc_speed(width, period+1, offset,
- AHD_SYNCRATE_MIN);
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
- "fallback_speed= %d\n", cur_speed, wide_speed,
- narrow_speed, fallback_speed);
- }
-#endif
-
- if (cur_speed > 160000) {
- /*
- * Paced/DT/IU_REQ only transfer speeds. All we
- * can do is fallback in terms of syncrate.
- */
- period++;
- } else if (cur_speed > 80000) {
- if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
- /*
- * Try without IU_REQ as it may be confusing
- * an expander.
- */
- ppr_options &= ~MSG_EXT_PPR_IU_REQ;
- } else {
- /*
- * Paced/DT only transfer speeds. All we
- * can do is fallback in terms of syncrate.
- */
- period++;
- ppr_options = targ->dv_max_ppr_options;
- }
- } else if (cur_speed > 3300) {
-
- /*
- * In this range we the following
- * options ordered from highest to
- * lowest desireability:
- *
- * o Wide/DT
- * o Wide/non-DT
- * o Narrow at a potentally higher sync rate.
- *
- * All modes are tested with and without IU_REQ
- * set since using IUs may confuse an expander.
- */
- if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
-
- ppr_options &= ~MSG_EXT_PPR_IU_REQ;
- } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
- /*
- * Try going non-DT.
- */
- ppr_options = targ->dv_max_ppr_options;
- ppr_options &= ~MSG_EXT_PPR_DT_REQ;
- } else if (targ->dv_last_ppr_options != 0) {
- /*
- * Try without QAS or any other PPR options.
- * We may need a non-PPR message to work with
- * an expander. We look at the "last PPR options"
- * so we will perform this fallback even if the
- * target responded to our PPR negotiation with
- * no option bits set.
- */
- ppr_options = 0;
- } else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
- /*
- * If the next narrow speed is greater than
- * the next wide speed, fallback to narrow.
- * Otherwise fallback to the next DT/Wide setting.
- * The narrow async speed will always be smaller
- * than the wide async speed, so handle this case
- * specifically.
- */
- ppr_options = targ->dv_max_ppr_options;
- if (narrow_speed > fallback_speed
- || period >= AHD_ASYNC_XFER_PERIOD) {
- targ->dv_next_wide_period = period+1;
- width = MSG_EXT_WDTR_BUS_8_BIT;
- period = targ->dv_next_narrow_period;
- } else {
- period++;
- }
- } else if ((ahd->features & AHD_WIDE) != 0
- && targ->dv_max_width != 0
- && wide_speed >= fallback_speed
- && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD
- || period >= AHD_ASYNC_XFER_PERIOD)) {
-
- /*
- * We are narrow. Try falling back
- * to the next wide speed with
- * all supported ppr options set.
- */
- targ->dv_next_narrow_period = period+1;
- width = MSG_EXT_WDTR_BUS_16_BIT;
- period = targ->dv_next_wide_period;
- ppr_options = targ->dv_max_ppr_options;
- } else {
- /* Only narrow fallback is allowed. */
- period++;
- ppr_options = targ->dv_max_ppr_options;
- }
- } else {
- return (-1);
- }
- offset = MAX_OFFSET;
- ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED);
- ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE);
- if (period == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- if (width == MSG_EXT_WDTR_BUS_8_BIT)
- targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD;
- else
- targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD;
- }
- ahd_set_syncrate(ahd, devinfo, period, offset,
- ppr_options, AHD_TRANS_GOAL, FALSE);
- targ->dv_last_ppr_options = ppr_options;
- return (0);
-}
-
-static void
-ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
-{
- struct ahd_softc *ahd;
- struct scb *scb;
- u_long flags;
-
- ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
- ahd_lock(ahd, &flags);
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV) {
- printf("%s: Timeout while doing DV command %x.\n",
- ahd_name(ahd), cmd->cmnd[0]);
- ahd_dump_card_state(ahd);
- }
-#endif
-
- /*
- * Guard against "done race". No action is
- * required if we just completed.
- */
- if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
- ahd_unlock(ahd, &flags);
- return;
- }
-
- /*
- * Command has not completed. Mark this
- * SCB as having failing status prior to
- * resetting the bus, so we get the correct
- * error code.
- */
- if ((scb->flags & SCB_SENSE) != 0)
- ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
- else
- ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
- ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE);
-
- /*
- * Add a minimal bus settle delay for devices that are slow to
- * respond after bus resets.
- */
- ahd_freeze_simq(ahd);
- init_timer(&ahd->platform_data->reset_timer);
- ahd->platform_data->reset_timer.data = (u_long)ahd;
- ahd->platform_data->reset_timer.expires = jiffies + HZ / 2;
- ahd->platform_data->reset_timer.function =
- (ahd_linux_callback_t *)ahd_release_simq;
- add_timer(&ahd->platform_data->reset_timer);
- if (ahd_linux_next_device_to_run(ahd) != NULL)
- ahd_schedule_runq(ahd);
- ahd_linux_run_complete_queue(ahd);
- ahd_unlock(ahd, &flags);
-}
-
-static void
-ahd_linux_dv_complete(struct scsi_cmnd *cmd)
-{
- struct ahd_softc *ahd;
-
- ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
-
- /* Delete the DV timer before it goes off! */
- scsi_delete_timer(cmd);
-
-#ifdef AHD_DEBUG
- if (ahd_debug & AHD_SHOW_DV)
- printf("%s:%c:%d: Command completed, status= 0x%x\n",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->result);
-#endif
-
- /* Wake up the state machine */
- up(&ahd->platform_data->dv_cmd_sem);
-}
-
-static void
-ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ)
-{
- uint16_t b;
- u_int i;
- u_int j;
-
- if (targ->dv_buffer != NULL)
- free(targ->dv_buffer, M_DEVBUF);
- targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
- if (targ->dv_buffer1 != NULL)
- free(targ->dv_buffer1, M_DEVBUF);
- targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
-
- i = 0;
-
- b = 0x0001;
- for (j = 0 ; i < targ->dv_echo_size; j++) {
- if (j < 32) {
- /*
- * 32bytes of sequential numbers.
- */
- targ->dv_buffer[i++] = j & 0xff;
- } else if (j < 48) {
- /*
- * 32bytes of repeating 0x0000, 0xffff.
- */
- targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
- } else if (j < 64) {
- /*
- * 32bytes of repeating 0x5555, 0xaaaa.
- */
- targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
- } else {
- /*
- * Remaining buffer is filled with a repeating
- * patter of:
- *
- * 0xffff
- * ~0x0001 << shifted once in each loop.
- */
- if (j & 0x02) {
- if (j & 0x01) {
- targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
- b <<= 1;
- if (b == 0x0000)
- b = 0x0001;
- } else {
- targ->dv_buffer[i++] = (~b & 0xff);
- }
- } else {
- targ->dv_buffer[i++] = 0xff;
- }
- }
- }
-}
-
-static u_int
-ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
-{
- static int warned_user;
- u_int tags;
-
- tags = 0;
- if ((ahd->user_discenable & devinfo->target_mask) != 0) {
- if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
-
- if (warned_user == 0) {
- printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient tag_info instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_tag_info array in\n"
-"aic79xx: the aic79xx_osm.c source file.\n");
- warned_user++;
- }
- tags = AHD_MAX_QUEUE;
- } else {
- adapter_tag_info_t *tag_info;
-
- tag_info = &aic79xx_tag_info[ahd->unit];
- tags = tag_info->tag_commands[devinfo->target_offset];
- if (tags > AHD_MAX_QUEUE)
- tags = AHD_MAX_QUEUE;
- }
- }
- return (tags);
-}
-
-static u_int
-ahd_linux_user_dv_setting(struct ahd_softc *ahd)
-{
- static int warned_user;
- int dv;
-
- if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) {
-
- if (warned_user == 0) {
- printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient dv settings instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_dv_settings array in"
-"aic79xx: the aic79xx_osm.c source file.\n");
- warned_user++;
- }
- dv = -1;
- } else {
-
- dv = aic79xx_dv_settings[ahd->unit];
- }
-
- if (dv < 0) {
- /*
- * Apply the default.
- */
- dv = 1;
- if (ahd->seep_config != 0)
- dv = (ahd->seep_config->bios_control & CFENABLEDV);
- }
- return (dv);
-}
-
-static void
-ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd)
-{
- static int warned_user;
- u_int rd_strm_mask;
- u_int target_id;
-
- /*
- * If we have specific read streaming info for this controller,
- * apply it. Otherwise use the defaults.
- */
- if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) {
-
- if (warned_user == 0) {
-
- printf(KERN_WARNING
-"aic79xx: WARNING: Insufficient rd_strm instances\n"
-"aic79xx: for installed controllers. Using defaults\n"
-"aic79xx: Please update the aic79xx_rd_strm_info array\n"
-"aic79xx: in the aic79xx_osm.c source file.\n");
- warned_user++;
- }
- rd_strm_mask = AIC79XX_CONFIGED_RD_STRM;
- } else {
-
- rd_strm_mask = aic79xx_rd_strm_info[ahd->unit];
- }
- for (target_id = 0; target_id < 16; target_id++) {
- struct ahd_devinfo devinfo;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
-
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- target_id, &tstate);
- ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
- CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
- tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM;
- if ((rd_strm_mask & devinfo.target_mask) != 0)
- tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM;
- }
-}
-
-/*
- * Determines the queue depth for a given device.
- */
-static void
-ahd_linux_device_queue_depth(struct ahd_softc *ahd,
- struct ahd_linux_device *dev)
-{
- struct ahd_devinfo devinfo;
- u_int tags;