diff options
Diffstat (limited to 'drivers/scsi/aic7xxx/aic79xx_core.c')
| -rw-r--r-- | drivers/scsi/aic7xxx/aic79xx_core.c | 166 |
1 files changed, 62 insertions, 104 deletions
diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c index 326a62226235..08771f6f6859 100644 --- a/drivers/scsi/aic7xxx/aic79xx_core.c +++ b/drivers/scsi/aic7xxx/aic79xx_core.c @@ -207,7 +207,6 @@ static void ahd_add_scb_to_free_list(struct ahd_softc *ahd, static u_int ahd_rem_wscb(struct ahd_softc *ahd, u_int scbid, u_int prev, u_int next, u_int tid); static void ahd_reset_current_bus(struct ahd_softc *ahd); -static ahd_callback_t ahd_reset_poll; static ahd_callback_t ahd_stat_timer; #ifdef AHD_DUMP_SEQ static void ahd_dumpseq(struct ahd_softc *ahd); @@ -1054,12 +1053,10 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat) * If a target takes us into the command phase * assume that it has been externally reset and * has thus lost our previous packetized negotiation - * agreement. Since we have not sent an identify - * message and may not have fully qualified the - * connection, we change our command to TUR, assert - * ATN and ABORT the task when we go to message in - * phase. The OSM will see the REQUEUE_REQUEST - * status and retry the command. + * agreement. + * Revert to async/narrow transfers until we + * can renegotiate with the device and notify + * the OSM about the reset. */ scbid = ahd_get_scbptr(ahd); scb = ahd_lookup_scb(ahd, scbid); @@ -1086,31 +1083,15 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat) ahd_set_syncrate(ahd, &devinfo, /*period*/0, /*offset*/0, /*ppr_options*/0, AHD_TRANS_ACTIVE, /*paused*/TRUE); - ahd_outb(ahd, SCB_CDB_STORE, 0); - ahd_outb(ahd, SCB_CDB_STORE+1, 0); - ahd_outb(ahd, SCB_CDB_STORE+2, 0); - ahd_outb(ahd, SCB_CDB_STORE+3, 0); - ahd_outb(ahd, SCB_CDB_STORE+4, 0); - ahd_outb(ahd, SCB_CDB_STORE+5, 0); - ahd_outb(ahd, SCB_CDB_LEN, 6); - scb->hscb->control &= ~(TAG_ENB|SCB_TAG_TYPE); - scb->hscb->control |= MK_MESSAGE; - ahd_outb(ahd, SCB_CONTROL, scb->hscb->control); - ahd_outb(ahd, MSG_OUT, HOST_MSG); - ahd_outb(ahd, SAVED_SCSIID, scb->hscb->scsiid); - /* - * The lun is 0, regardless of the SCB's lun - * as we have not sent an identify message. - */ - ahd_outb(ahd, SAVED_LUN, 0); - ahd_outb(ahd, SEQ_FLAGS, 0); - ahd_assert_atn(ahd); - scb->flags &= ~SCB_PACKETIZED; - scb->flags |= SCB_ABORT|SCB_CMDPHASE_ABORT; + scb->flags |= SCB_EXTERNAL_RESET; ahd_freeze_devq(ahd, scb); ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); ahd_freeze_scb(scb); + /* Notify XPT */ + ahd_send_async(ahd, devinfo.channel, devinfo.target, + CAM_LUN_WILDCARD, AC_SENT_BDR, NULL); + /* * Allow the sequencer to continue with * non-pack processing. @@ -1534,6 +1515,18 @@ ahd_handle_scsiint(struct ahd_softc *ahd, u_int intstat) lqistat1 = ahd_inb(ahd, LQISTAT1); lqostat0 = ahd_inb(ahd, LQOSTAT0); busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME; + + /* + * Ignore external resets after a bus reset. + */ + if (((status & SCSIRSTI) != 0) && (ahd->flags & AHD_BUS_RESET_ACTIVE)) + return; + + /* + * Clear bus reset flag + */ + ahd->flags &= ~AHD_BUS_RESET_ACTIVE; + if ((status0 & (SELDI|SELDO)) != 0) { u_int simode0; @@ -2207,22 +2200,6 @@ ahd_handle_nonpkt_busfree(struct ahd_softc *ahd) if (sent_msg == MSG_ABORT_TAG) tag = SCB_GET_TAG(scb); - if ((scb->flags & SCB_CMDPHASE_ABORT) != 0) { - /* - * This abort is in response to an - * unexpected switch to command phase - * for a packetized connection. Since - * the identify message was never sent, - * "saved lun" is 0. We really want to - * abort only the SCB that encountered - * this error, which could have a different - * lun. The SCB will be retried so the OS - * will see the UA after renegotiating to - * packetized. - */ - tag = SCB_GET_TAG(scb); - saved_lun = scb->hscb->lun; - } found = ahd_abort_scbs(ahd, target, 'A', saved_lun, tag, ROLE_INITIATOR, CAM_REQ_ABORTED); @@ -7847,6 +7824,17 @@ ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset) int found; u_int fifo; u_int next_fifo; + uint8_t scsiseq; + + /* + * Check if the last bus reset is cleared + */ + if (ahd->flags & AHD_BUS_RESET_ACTIVE) { + printf("%s: bus reset still active\n", + ahd_name(ahd)); + return 0; + } + ahd->flags |= AHD_BUS_RESET_ACTIVE; ahd->pending_device = NULL; @@ -7860,6 +7848,12 @@ ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset) /* Make sure the sequencer is in a safe location. */ ahd_clear_critical_section(ahd); + /* + * Run our command complete fifos to ensure that we perform + * completion processing on any commands that 'completed' + * before the reset occurred. + */ + ahd_run_qoutfifo(ahd); #ifdef AHD_TARGET_MODE if ((ahd->flags & AHD_TARGETROLE) != 0) { ahd_run_tqinfifo(ahd, /*paused*/TRUE); @@ -7924,30 +7918,14 @@ ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset) ahd_clear_fifo(ahd, 1); /* - * Revert to async/narrow transfers until we renegotiate. + * Reenable selections */ - max_scsiid = (ahd->features & AHD_WIDE) ? 15 : 7; - for (target = 0; target <= max_scsiid; target++) { - - if (ahd->enabled_targets[target] == NULL) - continue; - for (initiator = 0; initiator <= max_scsiid; initiator++) { - struct ahd_devinfo devinfo; - - ahd_compile_devinfo(&devinfo, target, initiator, - CAM_LUN_WILDCARD, - 'A', ROLE_UNKNOWN); - ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, - AHD_TRANS_CUR, /*paused*/TRUE); - ahd_set_syncrate(ahd, &devinfo, /*period*/0, - /*offset*/0, /*ppr_options*/0, - AHD_TRANS_CUR, /*paused*/TRUE); - } - } + ahd_outb(ahd, SIMODE1, ahd_inb(ahd, SIMODE1) | ENSCSIRST); + scsiseq = ahd_inb(ahd, SCSISEQ_TEMPLATE); + ahd_outb(ahd, SCSISEQ1, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); -#ifdef AHD_TARGET_MODE max_scsiid = (ahd->features & AHD_WIDE) ? 15 : 7; - +#ifdef AHD_TARGET_MODE /* * Send an immediate notify ccb to all target more peripheral * drivers affected by this action. @@ -7975,51 +7953,31 @@ ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset) /* Notify the XPT that a bus reset occurred */ ahd_send_async(ahd, devinfo.channel, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD, AC_BUS_RESET, NULL); - ahd_restart(ahd); + /* - * Freeze the SIMQ until our poller can determine that - * the bus reset has really gone away. We set the initial - * timer to 0 to have the check performed as soon as possible - * from the timer context. + * Revert to async/narrow transfers until we renegotiate. */ - if ((ahd->flags & AHD_RESET_POLL_ACTIVE) == 0) { - ahd->flags |= AHD_RESET_POLL_ACTIVE; - ahd_freeze_simq(ahd); - ahd_timer_reset(&ahd->reset_timer, 0, ahd_reset_poll, ahd); - } - return (found); -} + for (target = 0; target <= max_scsiid; target++) { + if (ahd->enabled_targets[target] == NULL) + continue; + for (initiator = 0; initiator <= max_scsiid; initiator++) { + struct ahd_devinfo devinfo; -#define AHD_RESET_POLL_US 1000 -static void -ahd_reset_poll(void *arg) -{ - struct ahd_softc *ahd = arg; - u_int scsiseq1; - u_long s; - - ahd_lock(ahd, &s); - ahd_pause(ahd); - ahd_update_modes(ahd); - ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); - ahd_outb(ahd, CLRSINT1, CLRSCSIRSTI); - if ((ahd_inb(ahd, SSTAT1) & SCSIRSTI) != 0) { - ahd_timer_reset(&ahd->reset_timer, AHD_RESET_POLL_US, - ahd_reset_poll, ahd); - ahd_unpause(ahd); - ahd_unlock(ahd, &s); - return; + ahd_compile_devinfo(&devinfo, target, initiator, + CAM_LUN_WILDCARD, + 'A', ROLE_UNKNOWN); + ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, + AHD_TRANS_CUR, /*paused*/TRUE); + ahd_set_syncrate(ahd, &devinfo, /*period*/0, + /*offset*/0, /*ppr_options*/0, + AHD_TRANS_CUR, /*paused*/TRUE); + } } - /* Reset is now low. Complete chip reinitialization. */ - ahd_outb(ahd, SIMODE1, ahd_inb(ahd, SIMODE1) | ENSCSIRST); - scsiseq1 = ahd_inb(ahd, SCSISEQ_TEMPLATE); - ahd_outb(ahd, SCSISEQ1, scsiseq1 & (ENSELI|ENRSELI|ENAUTOATNP)); - ahd_unpause(ahd); - ahd->flags &= ~AHD_RESET_POLL_ACTIVE; - ahd_unlock(ahd, &s); - ahd_release_simq(ahd); + ahd_restart(ahd); + + return (found); } /**************************** Statistics Processing ***************************/ |