*/
static uint32_t aic79xx_no_reset;
+/*
+ * Certain PCI motherboards will scan PCI devices from highest to lowest,
+ * others scan from lowest to highest, and they tend to do all kinds of
+ * strange things when they come into contact with PCI bridge chips. The
+ * net result of all this is that the PCI card that is actually used to boot
+ * the machine is very hard to detect. Most motherboards go from lowest
+ * PCI slot number to highest, and the first SCSI controller found is the
+ * one you boot from. The only exceptions to this are when a controller
+ * has its BIOS disabled. So, we by default sort all of our SCSI controllers
+ * from lowest PCI slot number to highest PCI slot number. We also force
+ * all controllers with their BIOS disabled to the end of the list. This
+ * works on *almost* all computers. Where it doesn't work, we have this
+ * option. Setting this option to non-0 will reverse the order of the sort
+ * to highest first, then lowest, but will still leave cards with their BIOS
+ * disabled at the very end. That should fix everyone up unless there are
+ * really strange cirumstances.
+ */
+static uint32_t aic79xx_reverse_scan;
+
/*
* Should we force EXTENDED translation on a controller.
* 0 == Use whatever is in the SEEPROM or default to off
" periodically to prevent tag starvation.\n"
" This may be required by some older disk\n"
" or drives/RAID arrays.\n"
+" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
" tag_info:<tag_str> Set per-target tag depth\n"
" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
struct scb *);
static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
struct scsi_cmnd *cmd);
-static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
+static void ahd_linux_sem_timeout(u_long arg);
+static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
struct ahd_devinfo *devinfo);
struct ahd_softc *ahd;
struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
int rtn = SCSI_MLQUEUE_HOST_BUSY;
+ unsigned long flags;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
- cmd->scsi_done = scsi_done;
- cmd->result = CAM_REQ_INPROG << 16;
- rtn = ahd_linux_run_command(ahd, dev, cmd);
+ ahd_lock(ahd, &flags);
+ if (ahd->platform_data->qfrozen == 0) {
+ cmd->scsi_done = scsi_done;
+ cmd->result = CAM_REQ_INPROG << 16;
+ rtn = ahd_linux_run_command(ahd, dev, cmd);
+ }
+ ahd_unlock(ahd, &flags);
return rtn;
}
struct seeprom_config *sc = ahd->seep_config;
unsigned long flags;
struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
+ struct ahd_linux_target *targ = scsi_transport_target_data(starget);
struct ahd_devinfo devinfo;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
BUG_ON(*ahd_targp != NULL);
*ahd_targp = starget;
+ memset(targ, 0, sizeof(*targ));
if (sc) {
int flags = sc->device_flags[starget->id];
{
struct ahd_softc *ahd =
*((struct ahd_softc **)sdev->host->hostdata);
+ struct scsi_target *starget = sdev->sdev_target;
+ struct ahd_linux_target *targ = scsi_transport_target_data(starget);
struct ahd_linux_device *dev;
if (bootverbose)
printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
+ BUG_ON(targ->sdev[sdev->lun] != NULL);
+
dev = scsi_transport_device_data(sdev);
memset(dev, 0, sizeof(*dev));
*/
dev->maxtags = 0;
+ targ->sdev[sdev->lun] = sdev;
+
return (0);
}
return 0;
}
+static void
+ahd_linux_slave_destroy(struct scsi_device *sdev)
+{
+ struct ahd_softc *ahd;
+ struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
+ struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
+
+ ahd = *((struct ahd_softc **)sdev->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
+
+ BUG_ON(dev->active);
+
+ targ->sdev[sdev->lun] = NULL;
+
+}
+
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
ahd_linux_abort(struct scsi_cmnd *cmd)
{
int error;
-
- error = ahd_linux_queue_abort_cmd(cmd);
+ error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
+ if (error != 0)
+ printf("aic79xx_abort returns 0x%x\n", error);
return error;
}
static int
ahd_linux_dev_reset(struct scsi_cmnd *cmd)
{
- struct ahd_softc *ahd;
- struct ahd_linux_device *dev;
- struct scb *reset_scb;
- u_int cdb_byte;
- int retval = SUCCESS;
- int paused;
- int wait;
- struct ahd_initiator_tinfo *tinfo;
- struct ahd_tmode_tstate *tstate;
- unsigned long flags;
- DECLARE_COMPLETION_ONSTACK(done);
-
- reset_scb = NULL;
- paused = FALSE;
- wait = FALSE;
- ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
-
- scmd_printk(KERN_INFO, cmd,
- "Attempting to queue a TARGET RESET message:");
-
- printf("CDB:");
- for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
- printf(" 0x%x", cmd->cmnd[cdb_byte]);
- printf("\n");
-
- /*
- * Determine if we currently own this command.
- */
- dev = scsi_transport_device_data(cmd->device);
-
- if (dev == NULL) {
- /*
- * No target device for this command exists,
- * so we must not still own the command.
- */
- scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
- return SUCCESS;
- }
-
- /*
- * Generate us a new SCB
- */
- reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
- if (!reset_scb) {
- scmd_printk(KERN_INFO, cmd, "No SCB available\n");
- return FAILED;
- }
-
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- cmd->device->id, &tstate);
- reset_scb->io_ctx = cmd;
- reset_scb->platform_data->dev = dev;
- reset_scb->sg_count = 0;
- ahd_set_residual(reset_scb, 0);
- ahd_set_sense_residual(reset_scb, 0);
- reset_scb->platform_data->xfer_len = 0;
- reset_scb->hscb->control = 0;
- reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
- reset_scb->hscb->lun = cmd->device->lun;
- reset_scb->hscb->cdb_len = 0;
- reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
- reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
- if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
- reset_scb->flags |= SCB_PACKETIZED;
- } else {
- reset_scb->hscb->control |= MK_MESSAGE;
- }
- dev->openings--;
- dev->active++;
- dev->commands_issued++;
-
- ahd_lock(ahd, &flags);
-
- LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
- ahd_queue_scb(ahd, reset_scb);
-
- ahd->platform_data->eh_done = &done;
- ahd_unlock(ahd, &flags);
-
- printf("%s: Device reset code sleeping\n", ahd_name(ahd));
- if (!wait_for_completion_timeout(&done, 5 * HZ)) {
- ahd_lock(ahd, &flags);
- ahd->platform_data->eh_done = NULL;
- ahd_unlock(ahd, &flags);
- printf("%s: Device reset timer expired (active %d)\n",
- ahd_name(ahd), dev->active);
- retval = FAILED;
- }
- printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
+ int error;
- return (retval);
+ error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
+ if (error != 0)
+ printf("aic79xx_dev_reset returns 0x%x\n", error);
+ return error;
}
/*
ahd_linux_bus_reset(struct scsi_cmnd *cmd)
{
struct ahd_softc *ahd;
+ u_long s;
int found;
- unsigned long flags;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
#ifdef AHD_DEBUG
printf("%s: Bus reset called for cmd %p\n",
ahd_name(ahd), cmd);
#endif
- ahd_lock(ahd, &flags);
-
+ ahd_lock(ahd, &s);
found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
/*initiate reset*/TRUE);
- ahd_unlock(ahd, &flags);
+ ahd_unlock(ahd, &s);
if (bootverbose)
printf("%s: SCSI bus reset delivered. "
.use_clustering = ENABLE_CLUSTERING,
.slave_alloc = ahd_linux_slave_alloc,
.slave_configure = ahd_linux_slave_configure,
+ .slave_destroy = ahd_linux_slave_destroy,
.target_alloc = ahd_linux_target_alloc,
.target_destroy = ahd_linux_target_destroy,
};
}
/********************* Platform Dependent Functions ***************************/
+/*
+ * Compare "left hand" softc with "right hand" softc, returning:
+ * < 0 - lahd has a lower priority than rahd
+ * 0 - Softcs are equal
+ * > 0 - lahd has a higher priority than rahd
+ */
+int
+ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
+{
+ int value;
+
+ /*
+ * Under Linux, cards are ordered as follows:
+ * 1) PCI devices that are marked as the boot controller.
+ * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
+ * 3) All remaining PCI devices sorted by bus/slot/func.
+ */
+#if 0
+ value = (lahd->flags & AHD_BOOT_CHANNEL)
+ - (rahd->flags & AHD_BOOT_CHANNEL);
+ if (value != 0)
+ /* Controllers set for boot have a *higher* priority */
+ return (value);
+#endif
+
+ value = (lahd->flags & AHD_BIOS_ENABLED)
+ - (rahd->flags & AHD_BIOS_ENABLED);
+ if (value != 0)
+ /* Controllers with BIOS enabled have a *higher* priority */
+ return (value);
+
+ /* Still equal. Sort by bus/slot/func. */
+ if (aic79xx_reverse_scan != 0)
+ value = ahd_get_pci_bus(lahd->dev_softc)
+ - ahd_get_pci_bus(rahd->dev_softc);
+ else
+ value = ahd_get_pci_bus(rahd->dev_softc)
+ - ahd_get_pci_bus(lahd->dev_softc);
+ if (value != 0)
+ return (value);
+ if (aic79xx_reverse_scan != 0)
+ value = ahd_get_pci_slot(lahd->dev_softc)
+ - ahd_get_pci_slot(rahd->dev_softc);
+ else
+ value = ahd_get_pci_slot(rahd->dev_softc)
+ - ahd_get_pci_slot(lahd->dev_softc);
+ if (value != 0)
+ return (value);
+
+ value = rahd->channel - lahd->channel;
+ return (value);
+}
+
static void
ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
{
if ((instance >= 0)
- && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
+ && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
uint8_t *iocell_info;
iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
printf("Setting Global Tags= %d\n", tags);
- for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
+ for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
for (j = 0; j < AHD_NUM_TARGETS; j++) {
aic79xx_tag_info[i].tag_commands[j] = tags;
}
{
if ((instance >= 0) && (targ >= 0)
- && (instance < ARRAY_SIZE(aic79xx_tag_info))
+ && (instance < NUM_ELEMENTS(aic79xx_tag_info))
&& (targ < AHD_NUM_TARGETS)) {
aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
if (bootverbose)
#ifdef AHD_DEBUG
{ "debug", &ahd_debug },
#endif
+ { "reverse_scan", &aic79xx_reverse_scan },
{ "periodic_otag", &aic79xx_periodic_otag },
{ "pci_parity", &aic79xx_pci_parity },
{ "seltime", &aic79xx_seltime },
end = strchr(s, '\0');
/*
- * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
+ * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
* will never be 0 in this case.
- */
- n = 0;
+ */
+ n = 0;
while ((p = strsep(&s, ",.")) != NULL) {
if (*p == '\0')
continue;
- for (i = 0; i < ARRAY_SIZE(options); i++) {
+ for (i = 0; i < NUM_ELEMENTS(options); i++) {
n = strlen(options[i].name);
if (strncmp(options[i].name, p, n) == 0)
break;
}
- if (i == ARRAY_SIZE(options))
+ if (i == NUM_ELEMENTS(options))
continue;
if (strncmp(p, "global_tag_depth", n) == 0) {
memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
ahd->platform_data->irq = AHD_LINUX_NOIRQ;
ahd_lockinit(ahd);
+ init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
ahd->seltime = (aic79xx_seltime & 0x3) << 4;
return (0);
}
ahd_platform_free(struct ahd_softc *ahd)
{
struct scsi_target *starget;
- int i;
+ int i, j;
if (ahd->platform_data != NULL) {
/* destroy all of the device and target objects */
for (i = 0; i < AHD_NUM_TARGETS; i++) {
starget = ahd->platform_data->starget[i];
if (starget != NULL) {
+ for (j = 0; j < AHD_NUM_LUNS; j++) {
+ struct ahd_linux_target *targ =
+ scsi_transport_target_data(starget);
+ if (targ->sdev[j] == NULL)
+ continue;
+ targ->sdev[j] = NULL;
+ }
ahd->platform_data->starget[i] = NULL;
}
}
/*
* Lookup and commit any modified IO Cell options.
*/
- if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
+ if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
struct ahd_linux_iocell_opts *iocell_opts;
iocell_opts = &aic79xx_iocell_info[ahd->unit];
}
void
-ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
- struct ahd_devinfo *devinfo, ahd_queue_alg alg)
+ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
+ ahd_queue_alg alg)
{
+ struct scsi_target *starget;
+ struct ahd_linux_target *targ;
struct ahd_linux_device *dev;
+ struct scsi_device *sdev;
int was_queuing;
int now_queuing;
+ starget = ahd->platform_data->starget[devinfo->target];
+ targ = scsi_transport_target_data(starget);
+ BUG_ON(targ == NULL);
+ sdev = targ->sdev[devinfo->lun];
if (sdev == NULL)
return;
switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
case AHD_DEV_Q_BASIC:
- scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
- scsi_activate_tcq(sdev, dev->openings + dev->active);
+ scsi_adjust_queue_depth(sdev,
+ MSG_SIMPLE_TASK,
+ dev->openings + dev->active);
break;
case AHD_DEV_Q_TAGGED:
- scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
- scsi_activate_tcq(sdev, dev->openings + dev->active);
+ scsi_adjust_queue_depth(sdev,
+ MSG_ORDERED_TASK,
+ dev->openings + dev->active);
break;
default:
/*
* serially on the controller/device. This should
* remove some latency.
*/
- scsi_deactivate_tcq(sdev, 1);
+ scsi_adjust_queue_depth(sdev,
+ /*NON-TAGGED*/0,
+ /*queue depth*/2);
break;
}
}
tags = 0;
if ((ahd->user_discenable & devinfo->target_mask) != 0) {
- if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
+ if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
if (warned_user == 0) {
printf(KERN_WARNING
tags = ahd_linux_user_tagdepth(ahd, &devinfo);
if (tags != 0 && sdev->tagged_supported != 0) {
- ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
- ahd_send_async(ahd, devinfo.channel, devinfo.target,
- devinfo.lun, AC_TRANSFER_NEG);
+ ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
ahd_print_devinfo(ahd, &devinfo);
printf("Tagged Queuing enabled. Depth %d\n", tags);
} else {
- ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
- ahd_send_async(ahd, devinfo.channel, devinfo.target,
- devinfo.lun, AC_TRANSFER_NEG);
+ ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
}
}
struct ahd_tmode_tstate *tstate;
u_int col_idx;
uint16_t mask;
- unsigned long flags;
-
- ahd_lock(ahd, &flags);
/*
* Get an scb to use.
}
if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
ahd->flags |= AHD_RESOURCE_SHORTAGE;
- ahd_unlock(ahd, &flags);
return SCSI_MLQUEUE_HOST_BUSY;
}
if ((tstate->auto_negotiate & mask) != 0) {
scb->flags |= SCB_AUTO_NEGOTIATE;
scb->hscb->control |= MK_MESSAGE;
+ } else if (cmd->cmnd[0] == INQUIRY
+ && (tinfo->curr.offset != 0
+ || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
+ || tinfo->curr.ppr_options != 0)
+ && (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
+ /*
+ * The SCSI spec requires inquiry
+ * commands to complete without
+ * reporting unit attention conditions.
+ * Because of this, an inquiry command
+ * that occurs just after a device is
+ * reset will result in a data phase
+ * with mismatched negotiated rates.
+ * The core already forces a renegotiation
+ * for reset events that are visible to
+ * our controller or that we initiate,
+ * but a third party device reset or a
+ * hot-plug insertion can still cause this
+ * issue. Therefore, we force a re-negotiation
+ * for every inquiry command unless we
+ * are async.
+ */
+ scb->flags |= SCB_NEGOTIATE;
+ scb->hscb->control |= MK_MESSAGE;
}
if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
scb->flags |= SCB_ACTIVE;
ahd_queue_scb(ahd, scb);
- ahd_unlock(ahd, &flags);
-
return 0;
}
return IRQ_RETVAL(ours);
}
+void
+ahd_platform_flushwork(struct ahd_softc *ahd)
+{
+
+}
+
void
ahd_send_async(struct ahd_softc *ahd, char channel,
- u_int target, u_int lun, ac_code code)
+ u_int target, u_int lun, ac_code code, void *arg)
{
switch (code) {
case AC_TRANSFER_NEG:
{
char buf[80];
struct scsi_target *starget;
+ struct ahd_linux_target *targ;
struct info_str info;
struct ahd_initiator_tinfo *tinfo;
struct ahd_tmode_tstate *tstate;
starget = ahd->platform_data->starget[target];
if (starget == NULL)
break;
+ targ = scsi_transport_target_data(starget);
target_ppr_options =
(spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
|| ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
-
- if (ahd->platform_data->eh_done)
- complete(ahd->platform_data->eh_done);
+ if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
+ ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
+ up(&ahd->platform_data->eh_sem);
+ }
}
ahd_free_scb(ahd, scb);
}
ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
ahd_set_scsi_status(scb, SCSI_STATUS_OK);
- ahd_platform_set_tags(ahd, sdev, &devinfo,
+ ahd_platform_set_tags(ahd, &devinfo,
(dev->flags & AHD_DEV_Q_BASIC)
? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
break;
* as if the target returned BUSY SCSI status.
*/
dev->openings = 1;
- ahd_platform_set_tags(ahd, sdev, &devinfo,
+ ahd_platform_set_tags(ahd, &devinfo,
(dev->flags & AHD_DEV_Q_BASIC)
? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
static void
ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
{
- int status;
- int new_status = DID_OK;
- int do_fallback = 0;
- int scsi_status;
-
/*
* Map CAM error codes into Linux Error codes. We
* avoid the conversion so that the DV code has the
* full error information available when making
* state change decisions.
*/
-
- status = ahd_cmd_get_transaction_status(cmd);
- switch (status) {
- case CAM_REQ_INPROG:
- case CAM_REQ_CMP:
- new_status = DID_OK;
- break;
- case CAM_AUTOSENSE_FAIL:
- new_status = DID_ERROR;
- /* Fallthrough */
- case CAM_SCSI_STATUS_ERROR:
- scsi_status = ahd_cmd_get_scsi_status(cmd);
-
- switch(scsi_status) {
- case SCSI_STATUS_CMD_TERMINATED:
- case SCSI_STATUS_CHECK_COND:
- if ((cmd->result >> 24) != DRIVER_SENSE) {
- do_fallback = 1;
- } else {
- struct scsi_sense_data *sense;
-
- sense = (struct scsi_sense_data *)
- &cmd->sense_buffer;
- if (sense->extra_len >= 5 &&
- (sense->add_sense_code == 0x47
- || sense->add_sense_code == 0x48))
- do_fallback = 1;
- }
+ {
+ uint32_t status;
+ u_int new_status;
+
+ status = ahd_cmd_get_transaction_status(cmd);
+ switch (status) {
+ case CAM_REQ_INPROG:
+ case CAM_REQ_CMP:
+ case CAM_SCSI_STATUS_ERROR:
+ new_status = DID_OK;
+ break;
+ case CAM_REQ_ABORTED:
+ new_status = DID_ABORT;
+ break;
+ case CAM_BUSY:
+ new_status = DID_BUS_BUSY;
+ break;
+ case CAM_REQ_INVALID:
+ case CAM_PATH_INVALID:
+ new_status = DID_BAD_TARGET;
+ break;
+ case CAM_SEL_TIMEOUT:
+ new_status = DID_NO_CONNECT;
+ break;
+ case CAM_SCSI_BUS_RESET:
+ case CAM_BDR_SENT:
+ new_status = DID_RESET;
+ break;
+ case CAM_UNCOR_PARITY:
+ new_status = DID_PARITY;
+ break;
+ case CAM_CMD_TIMEOUT:
+ new_status = DID_TIME_OUT;
+ break;
+ case CAM_UA_ABORT:
+ case CAM_REQ_CMP_ERR:
+ case CAM_AUTOSENSE_FAIL:
+ case CAM_NO_HBA:
+ case CAM_DATA_RUN_ERR:
+ case CAM_UNEXP_BUSFREE:
+ case CAM_SEQUENCE_FAIL:
+ case CAM_CCB_LEN_ERR:
+ case CAM_PROVIDE_FAIL:
+ case CAM_REQ_TERMIO:
+ case CAM_UNREC_HBA_ERROR:
+ case CAM_REQ_TOO_BIG:
+ new_status = DID_ERROR;
+ break;
+ case CAM_REQUEUE_REQ:
+ new_status = DID_REQUEUE;
break;
default:
+ /* We should never get here */
+ new_status = DID_ERROR;
break;
}
- break;
- case CAM_REQ_ABORTED:
- new_status = DID_ABORT;
- break;
- case CAM_BUSY:
- new_status = DID_BUS_BUSY;
- break;
- case CAM_REQ_INVALID:
- case CAM_PATH_INVALID:
- new_status = DID_BAD_TARGET;
- break;
- case CAM_SEL_TIMEOUT:
- new_status = DID_NO_CONNECT;
- break;
- case CAM_SCSI_BUS_RESET:
- case CAM_BDR_SENT:
- new_status = DID_RESET;
- break;
- case CAM_UNCOR_PARITY:
- new_status = DID_PARITY;
- do_fallback = 1;
- break;
- case CAM_CMD_TIMEOUT:
- new_status = DID_TIME_OUT;
- do_fallback = 1;
- break;
- case CAM_REQ_CMP_ERR:
- case CAM_UNEXP_BUSFREE:
- case CAM_DATA_RUN_ERR:
- new_status = DID_ERROR;
- do_fallback = 1;
- break;
- case CAM_UA_ABORT:
- case CAM_NO_HBA:
- case CAM_SEQUENCE_FAIL:
- case CAM_CCB_LEN_ERR:
- case CAM_PROVIDE_FAIL:
- case CAM_REQ_TERMIO:
- case CAM_UNREC_HBA_ERROR:
- case CAM_REQ_TOO_BIG:
- new_status = DID_ERROR;
- break;
- case CAM_REQUEUE_REQ:
- new_status = DID_REQUEUE;
- break;
- default:
- /* We should never get here */
- new_status = DID_ERROR;
- break;
- }
- if (do_fallback) {
- printf("%s: device overrun (status %x) on %d:%d:%d\n",
- ahd_name(ahd), status, cmd->device->channel,
- cmd->device->id, cmd->device->lun);
+ ahd_cmd_set_transaction_status(cmd, new_status);
}
- ahd_cmd_set_transaction_status(cmd, new_status);
-
cmd->scsi_done(cmd);
}
+static void
+ahd_linux_sem_timeout(u_long arg)
+{
+ struct ahd_softc *ahd;
+ u_long s;
+
+ ahd = (struct ahd_softc *)arg;
+
+ ahd_lock(ahd, &s);
+ if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
+ ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
+ up(&ahd->platform_data->eh_sem);
+ }
+ ahd_unlock(ahd, &s);
+}
+
void
ahd_freeze_simq(struct ahd_softc *ahd)
{
- scsi_block_requests(ahd->platform_data->host);
+ unsigned long s;
+
+ ahd_lock(ahd, &s);
+ ahd->platform_data->qfrozen++;
+ if (ahd->platform_data->qfrozen == 1) {
+ scsi_block_requests(ahd->platform_data->host);
+ ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
+ CAM_LUN_WILDCARD, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ);
+ }
+ ahd_unlock(ahd, &s);
}
void
ahd_release_simq(struct ahd_softc *ahd)
{
- scsi_unblock_requests(ahd->platform_data->host);
+ u_long s;
+ int unblock_reqs;
+
+ unblock_reqs = 0;
+ ahd_lock(ahd, &s);
+ if (ahd->platform_data->qfrozen > 0)
+ ahd->platform_data->qfrozen--;
+ if (ahd->platform_data->qfrozen == 0) {
+ unblock_reqs = 1;
+ }
+ ahd_unlock(ahd, &s);
+ /*
+ * There is still a race here. The mid-layer
+ * should keep its own freeze count and use
+ * a bottom half handler to run the queues
+ * so we can unblock with our own lock held.
+ */
+ if (unblock_reqs)
+ scsi_unblock_requests(ahd->platform_data->host);
}
static int
-ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
+ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
{
struct ahd_softc *ahd;
struct ahd_linux_device *dev;
int paused;
int wait;
int disconnected;
+ int found;
ahd_mode_state saved_modes;
unsigned long flags;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
scmd_printk(KERN_INFO, cmd,
- "Attempting to queue an ABORT message:");
+ "Attempting to queue a%s message:",
+ flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
printf("CDB:");
for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
break;
}
+ if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
+
+ /* Any SCB for this device will do for a target reset */
+ LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
+ if (ahd_match_scb(ahd, pending_scb,
+ scmd_id(cmd),
+ scmd_channel(cmd) + 'A',
+ CAM_LUN_WILDCARD,
+ SCB_LIST_NULL, ROLE_INITIATOR))
+ break;
+ }
+ }
+
if (pending_scb == NULL) {
scmd_printk(KERN_INFO, cmd, "Command not found\n");
goto no_cmd;
ahd_dump_card_state(ahd);
disconnected = TRUE;
- if (ahd_search_qinfifo(ahd, cmd->device->id,
- cmd->device->channel + 'A',
- cmd->device->lun,
- pending_scb->hscb->tag,
- ROLE_INITIATOR, CAM_REQ_ABORTED,
- SEARCH_COMPLETE) > 0) {
- printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
- ahd_name(ahd), cmd->device->channel,
- cmd->device->id, cmd->device->lun);
- retval = SUCCESS;
- goto done;
+ if (flag == SCB_ABORT) {
+ if (ahd_search_qinfifo(ahd, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun,
+ pending_scb->hscb->tag,
+ ROLE_INITIATOR, CAM_REQ_ABORTED,
+ SEARCH_COMPLETE) > 0) {
+ printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
+ ahd_name(ahd), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
+ retval = SUCCESS;
+ goto done;
+ }
+ } else if (ahd_search_qinfifo(ahd, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, pending_scb->hscb->tag,
+ ROLE_INITIATOR, /*status*/0,
+ SEARCH_COUNT) > 0) {
+ disconnected = FALSE;
}
saved_modes = ahd_save_modes(ahd);
last_phase = ahd_inb(ahd, LASTPHASE);
saved_scbptr = ahd_get_scbptr(ahd);
active_scbptr = saved_scbptr;
- if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
+ if (disconnected && ((last_phase != P_BUSFREE) ||
+ (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
struct scb *bus_scb;
bus_scb = ahd_lookup_scb(ahd, active_scbptr);
if (bus_scb == pending_scb)
disconnected = FALSE;
+ else if (flag != SCB_ABORT
+ && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
+ && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
+ disconnected = FALSE;
}
/*
* bus or is in the disconnected state.
*/
saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
- if (last_phase != P_BUSFREE
- && SCB_GET_TAG(pending_scb) == active_scbptr) {
+ if (SCB_GET_TAG(pending_scb) == active_scbptr
+ || (flag == SCB_DEVICE_RESET
+ && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
/*
* We're active on the bus, so assert ATN
* and hope that the target responds.
*/
pending_scb = ahd_lookup_scb(ahd, active_scbptr);
- pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
+ pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
ahd_outb(ahd, MSG_OUT, HOST_MSG);
ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
- scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
+ scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
wait = TRUE;
+ } else if (last_phase != P_BUSFREE
+ && ahd_inb(ahd, SCSIPHASE) == 0) {
+ /*
+ * SCB is not identified, there
+ * is no pending REQ, and the sequencer
+ * has not seen a busfree. Looks like
+ * a stuck connection waiting to
+ * go busfree. Reset the bus.
+ */
+ found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
+ /*Initiate Reset*/TRUE);
+ printf("%s: Issued Channel %c Bus Reset. "
+ "%d SCBs aborted\n", ahd_name(ahd),
+ cmd->device->channel + 'A', found);
} else if (disconnected) {
/*
* Actually re-queue this SCB in an attempt
* to select the device before it reconnects.
*/
- pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
+ pending_scb->flags |= SCB_RECOVERY_SCB|flag;
ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
pending_scb->hscb->cdb_len = 0;
pending_scb->hscb->task_attribute = 0;
if (paused)
ahd_unpause(ahd);
if (wait) {
- DECLARE_COMPLETION_ONSTACK(done);
+ struct timer_list timer;
+ int ret;
- ahd->platform_data->eh_done = &done;
+ ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
ahd_unlock(ahd, &flags);
+ init_timer(&timer);
+ timer.data = (u_long)ahd;
+ timer.expires = jiffies + (5 * HZ);
+ timer.function = ahd_linux_sem_timeout;
+ add_timer(&timer);
printf("%s: Recovery code sleeping\n", ahd_name(ahd));
- if (!wait_for_completion_timeout(&done, 5 * HZ)) {
- ahd_lock(ahd, &flags);
- ahd->platform_data->eh_done = NULL;
- ahd_unlock(ahd, &flags);
+ down(&ahd->platform_data->eh_sem);
+ printf("%s: Recovery code awake\n", ahd_name(ahd));
+ ret = del_timer_sync(&timer);
+ if (ret == 0) {
printf("%s: Timer Expired (active %d)\n",
ahd_name(ahd), dev->active);
retval = FAILED;
}
- printf("Recovery code awake\n");
} else
ahd_unlock(ahd, &flags);
- if (retval != SUCCESS)
- printf("%s: Command abort returning 0x%x\n",
- ahd_name(ahd), retval);
-
- return retval;
+ return (retval);
}
static void ahd_linux_set_width(struct scsi_target *starget, int width)
if (!ahd_linux_transport_template)
return -ENODEV;
+ scsi_transport_reserve_target(ahd_linux_transport_template,
+ sizeof(struct ahd_linux_target));
scsi_transport_reserve_device(ahd_linux_transport_template,
sizeof(struct ahd_linux_device));
git://git.onelab.eu / linux-2.6.git / blobdiff