#include <linux/scatterlist.h>
#include <linux/slab.h>
+#include <linux/async.h>
+#include <linux/export.h>
#include <scsi/sas_ata.h>
#include "sas_internal.h"
static void sas_ata_task_done(struct sas_task *task)
{
struct ata_queued_cmd *qc = task->uldd_task;
- struct domain_device *dev;
+ struct domain_device *dev = task->dev;
struct task_status_struct *stat = &task->task_status;
struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
- struct sas_ha_struct *sas_ha;
+ struct sas_ha_struct *sas_ha = dev->port->ha;
enum ata_completion_errors ac;
unsigned long flags;
struct ata_link *link;
+ struct ata_port *ap;
+
+ spin_lock_irqsave(&dev->done_lock, flags);
+ if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
+ task = NULL;
+ else if (qc && qc->scsicmd)
+ ASSIGN_SAS_TASK(qc->scsicmd, NULL);
+ spin_unlock_irqrestore(&dev->done_lock, flags);
+
+ /* check if libsas-eh got to the task before us */
+ if (unlikely(!task))
+ return;
if (!qc)
goto qc_already_gone;
- dev = qc->ap->private_data;
- sas_ha = dev->port->ha;
- link = &dev->sata_dev.ap->link;
+ ap = qc->ap;
+ link = &ap->link;
+
+ spin_lock_irqsave(ap->lock, flags);
+ /* check if we lost the race with libata/sas_ata_post_internal() */
+ if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
+ spin_unlock_irqrestore(ap->lock, flags);
+ if (qc->scsicmd)
+ goto qc_already_gone;
+ else {
+ /* if eh is not involved and the port is frozen then the
+ * ata internal abort process has taken responsibility
+ * for this sas_task
+ */
+ return;
+ }
+ }
- spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
((stat->stat == SAM_STAT_CHECK_CONDITION &&
dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
if (unlikely(link->eh_info.err_mask))
qc->flags |= ATA_QCFLAG_FAILED;
}
-
- dev->sata_dev.sstatus = resp->sstatus;
- dev->sata_dev.serror = resp->serror;
- dev->sata_dev.scontrol = resp->scontrol;
} else {
ac = sas_to_ata_err(stat);
if (ac) {
}
qc->lldd_task = NULL;
- if (qc->scsicmd)
- ASSIGN_SAS_TASK(qc->scsicmd, NULL);
ata_qc_complete(qc);
- spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
-
- /*
- * If the sas_task has an ata qc, a scsi_cmnd and the aborted
- * flag is set, then we must have come in via the libsas EH
- * functions. When we exit this function, we need to put the
- * scsi_cmnd on the list of finished errors. The ata_qc_complete
- * call cleans up the libata side of things but we're protected
- * from the scsi_cmnd going away because the scsi_cmnd is owned
- * by the EH, making libata's call to scsi_done a NOP.
- */
- spin_lock_irqsave(&task->task_state_lock, flags);
- if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED)
- scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q);
- spin_unlock_irqrestore(&task->task_state_lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
qc_already_gone:
list_del_init(&task->list);
static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
{
- int res;
+ unsigned long flags;
struct sas_task *task;
- struct domain_device *dev = qc->ap->private_data;
+ struct scatterlist *sg;
+ int ret = AC_ERR_SYSTEM;
+ unsigned int si, xfer = 0;
+ struct ata_port *ap = qc->ap;
+ struct domain_device *dev = ap->private_data;
struct sas_ha_struct *sas_ha = dev->port->ha;
struct Scsi_Host *host = sas_ha->core.shost;
struct sas_internal *i = to_sas_internal(host->transportt);
- struct scatterlist *sg;
- unsigned int xfer = 0;
- unsigned int si;
+
+ /* TODO: audit callers to ensure they are ready for qc_issue to
+ * unconditionally re-enable interrupts
+ */
+ local_irq_save(flags);
+ spin_unlock(ap->lock);
/* If the device fell off, no sense in issuing commands */
- if (dev->gone)
- return AC_ERR_SYSTEM;
+ if (test_bit(SAS_DEV_GONE, &dev->state))
+ goto out;
task = sas_alloc_task(GFP_ATOMIC);
if (!task)
- return AC_ERR_SYSTEM;
+ goto out;
task->dev = dev;
task->task_proto = SAS_PROTOCOL_STP;
task->task_done = sas_ata_task_done;
ASSIGN_SAS_TASK(qc->scsicmd, task);
if (sas_ha->lldd_max_execute_num < 2)
- res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
+ ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
else
- res = sas_queue_up(task);
+ ret = sas_queue_up(task);
/* Examine */
- if (res) {
- SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
+ if (ret) {
+ SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);
if (qc->scsicmd)
ASSIGN_SAS_TASK(qc->scsicmd, NULL);
sas_free_task(task);
- return AC_ERR_SYSTEM;
+ ret = AC_ERR_SYSTEM;
}
- return 0;
+ out:
+ spin_lock(ap->lock);
+ local_irq_restore(flags);
+ return ret;
}
static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
return true;
}
-static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
+static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
+{
+ return to_sas_internal(dev->port->ha->core.shost->transportt);
+}
+
+static void sas_get_ata_command_set(struct domain_device *dev);
+
+int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
{
+ if (phy->attached_tproto & SAS_PROTOCOL_STP)
+ dev->tproto = phy->attached_tproto;
+ if (phy->attached_sata_dev)
+ dev->tproto |= SATA_DEV;
+
+ if (phy->attached_dev_type == SATA_PENDING)
+ dev->dev_type = SATA_PENDING;
+ else {
+ int res;
+
+ dev->dev_type = SATA_DEV;
+ res = sas_get_report_phy_sata(dev->parent, phy->phy_id,
+ &dev->sata_dev.rps_resp);
+ if (res) {
+ SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
+ "0x%x\n", SAS_ADDR(dev->parent->sas_addr),
+ phy->phy_id, res);
+ return res;
+ }
+ memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis,
+ sizeof(struct dev_to_host_fis));
+ /* TODO switch to ata_dev_classify() */
+ sas_get_ata_command_set(dev);
+ }
+ return 0;
+}
+
+static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
+{
+ int res;
+
+ /* we weren't pending, so successfully end the reset sequence now */
+ if (dev->dev_type != SATA_PENDING)
+ return 1;
+
+ /* hmmm, if this succeeds do we need to repost the domain_device to the
+ * lldd so it can pick up new parameters?
+ */
+ res = sas_get_ata_info(dev, phy);
+ if (res)
+ return 0; /* retry */
+ else
+ return 1;
+}
+
+static int smp_ata_check_ready(struct ata_link *link)
+{
+ int res;
struct ata_port *ap = link->ap;
struct domain_device *dev = ap->private_data;
- struct sas_internal *i =
- to_sas_internal(dev->port->ha->core.shost->transportt);
- int res = TMF_RESP_FUNC_FAILED;
- int ret = 0;
+ struct domain_device *ex_dev = dev->parent;
+ struct sas_phy *phy = sas_get_local_phy(dev);
+ struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number];
- if (i->dft->lldd_I_T_nexus_reset)
- res = i->dft->lldd_I_T_nexus_reset(dev);
+ res = sas_ex_phy_discover(ex_dev, phy->number);
+ sas_put_local_phy(phy);
- if (res != TMF_RESP_FUNC_COMPLETE) {
- SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__);
- ret = -EAGAIN;
+ /* break the wait early if the expander is unreachable,
+ * otherwise keep polling
+ */
+ if (res == -ECOMM)
+ return res;
+ if (res != SMP_RESP_FUNC_ACC)
+ return 0;
+
+ switch (ex_phy->attached_dev_type) {
+ case SATA_PENDING:
+ return 0;
+ case SAS_END_DEV:
+ if (ex_phy->attached_sata_dev)
+ return sas_ata_clear_pending(dev, ex_phy);
+ default:
+ return -ENODEV;
}
+}
- switch (dev->sata_dev.command_set) {
- case ATA_COMMAND_SET:
- SAS_DPRINTK("%s: Found ATA device.\n", __func__);
- *class = ATA_DEV_ATA;
- break;
- case ATAPI_COMMAND_SET:
- SAS_DPRINTK("%s: Found ATAPI device.\n", __func__);
- *class = ATA_DEV_ATAPI;
- break;
- default:
- SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
- __func__,
- dev->sata_dev.command_set);
- *class = ATA_DEV_UNKNOWN;
- break;
+static int local_ata_check_ready(struct ata_link *link)
+{
+ struct ata_port *ap = link->ap;
+ struct domain_device *dev = ap->private_data;
+ struct sas_internal *i = dev_to_sas_internal(dev);
+
+ if (i->dft->lldd_ata_check_ready)
+ return i->dft->lldd_ata_check_ready(dev);
+ else {
+ /* lldd's that don't implement 'ready' checking get the
+ * old default behavior of not coordinating reset
+ * recovery with libata
+ */
+ return 1;
}
+}
- ap->cbl = ATA_CBL_SATA;
- return ret;
+static int sas_ata_printk(const char *level, const struct domain_device *ddev,
+ const char *fmt, ...)
+{
+ struct ata_port *ap = ddev->sata_dev.ap;
+ struct device *dev = &ddev->rphy->dev;
+ struct va_format vaf;
+ va_list args;
+ int r;
+
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ r = printk("%ssas: ata%u: %s: %pV",
+ level, ap->print_id, dev_name(dev), &vaf);
+
+ va_end(args);
+
+ return r;
}
-static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
+static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
{
+ int ret = 0, res;
+ struct sas_phy *phy;
struct ata_port *ap = link->ap;
+ int (*check_ready)(struct ata_link *link);
struct domain_device *dev = ap->private_data;
- struct sas_internal *i =
- to_sas_internal(dev->port->ha->core.shost->transportt);
- int res = TMF_RESP_FUNC_FAILED;
- int ret = 0;
+ struct sas_internal *i = dev_to_sas_internal(dev);
- if (i->dft->lldd_ata_soft_reset)
- res = i->dft->lldd_ata_soft_reset(dev);
+ res = i->dft->lldd_I_T_nexus_reset(dev);
+ if (res == -ENODEV)
+ return res;
- if (res != TMF_RESP_FUNC_COMPLETE) {
- SAS_DPRINTK("%s: Unable to soft reset\n", __func__);
- ret = -EAGAIN;
- }
+ if (res != TMF_RESP_FUNC_COMPLETE)
+ sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
+
+ phy = sas_get_local_phy(dev);
+ if (scsi_is_sas_phy_local(phy))
+ check_ready = local_ata_check_ready;
+ else
+ check_ready = smp_ata_check_ready;
+ sas_put_local_phy(phy);
+
+ ret = ata_wait_after_reset(link, deadline, check_ready);
+ if (ret && ret != -EAGAIN)
+ sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);
+ /* XXX: if the class changes during the reset the upper layer
+ * should be informed, if the device has gone away we assume
+ * libsas will eventually delete it
+ */
switch (dev->sata_dev.command_set) {
case ATA_COMMAND_SET:
- SAS_DPRINTK("%s: Found ATA device.\n", __func__);
*class = ATA_DEV_ATA;
break;
case ATAPI_COMMAND_SET:
- SAS_DPRINTK("%s: Found ATAPI device.\n", __func__);
*class = ATA_DEV_ATAPI;
break;
- default:
- SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
- __func__, dev->sata_dev.command_set);
- *class = ATA_DEV_UNKNOWN;
- break;
}
ap->cbl = ATA_CBL_SATA;
return ret;
}
+/*
+ * notify the lldd to forget the sas_task for this internal ata command
+ * that bypasses scsi-eh
+ */
+static void sas_ata_internal_abort(struct sas_task *task)
+{
+ struct sas_internal *si = dev_to_sas_internal(task->dev);
+ unsigned long flags;
+ int res;
+
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
+ task->task_state_flags & SAS_TASK_STATE_DONE) {
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+ SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
+ task);
+ goto out;
+ }
+ task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+ res = si->dft->lldd_abort_task(task);
+
+ spin_lock_irqsave(&task->task_state_lock, flags);
+ if (task->task_state_flags & SAS_TASK_STATE_DONE ||
+ res == TMF_RESP_FUNC_COMPLETE) {
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+ goto out;
+ }
+
+ /* XXX we are not prepared to deal with ->lldd_abort_task()
+ * failures. TODO: lldds need to unconditionally forget about
+ * aborted ata tasks, otherwise we (likely) leak the sas task
+ * here
+ */
+ SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
+
+ if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
+ task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
+ spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+ return;
+ out:
+ list_del_init(&task->list);
+ sas_free_task(task);
+}
+
static void sas_ata_post_internal(struct ata_queued_cmd *qc)
{
if (qc->flags & ATA_QCFLAG_FAILED)
if (qc->err_mask) {
/*
- * Find the sas_task and kill it. By this point,
- * libata has decided to kill the qc, so we needn't
- * bother with sas_ata_task_done. But we still
- * ought to abort the task.
+ * Find the sas_task and kill it. By this point, libata
+ * has decided to kill the qc and has frozen the port.
+ * In this state sas_ata_task_done() will no longer free
+ * the sas_task, so we need to notify the lldd (via
+ * ->lldd_abort_task) that the task is dead and free it
+ * ourselves.
*/
struct sas_task *task = qc->lldd_task;
- unsigned long flags;
qc->lldd_task = NULL;
- if (task) {
- /* Should this be a AT(API) device reset? */
- spin_lock_irqsave(&task->task_state_lock, flags);
- task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
- spin_unlock_irqrestore(&task->task_state_lock, flags);
-
- task->uldd_task = NULL;
- __sas_task_abort(task);
- }
+ if (!task)
+ return;
+ task->uldd_task = NULL;
+ sas_ata_internal_abort(task);
}
}
+
+static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
+{
+ struct domain_device *dev = ap->private_data;
+ struct sas_internal *i = dev_to_sas_internal(dev);
+
+ if (i->dft->lldd_ata_set_dmamode)
+ i->dft->lldd_ata_set_dmamode(dev);
+}
+
static struct ata_port_operations sas_sata_ops = {
.prereset = ata_std_prereset,
- .softreset = sas_ata_soft_reset,
.hardreset = sas_ata_hard_reset,
.postreset = ata_std_postreset,
.error_handler = ata_std_error_handler,
.qc_fill_rtf = sas_ata_qc_fill_rtf,
.port_start = ata_sas_port_start,
.port_stop = ata_sas_port_stop,
+ .set_dmamode = sas_ata_set_dmamode,
};
static struct ata_port_info sata_port_info = {
.port_ops = &sas_sata_ops
};
-int sas_ata_init_host_and_port(struct domain_device *found_dev,
- struct scsi_target *starget)
+int sas_ata_init_host_and_port(struct domain_device *found_dev)
{
- struct Scsi_Host *shost = dev_to_shost(&starget->dev);
- struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
+ struct sas_ha_struct *ha = found_dev->port->ha;
+ struct Scsi_Host *shost = ha->core.shost;
struct ata_port *ap;
ata_host_init(&found_dev->sata_dev.ata_host,
ap->private_data = found_dev;
ap->cbl = ATA_CBL_SATA;
ap->scsi_host = shost;
+ /* publish initialized ata port */
+ smp_wmb();
found_dev->sata_dev.ap = ap;
return 0;
complete(waiting);
}
-static void sas_task_timedout(unsigned long _task)
-{
- struct sas_task *task = (void *) _task;
- unsigned long flags;
-
- spin_lock_irqsave(&task->task_state_lock, flags);
- if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
- task->task_state_flags |= SAS_TASK_STATE_ABORTED;
- spin_unlock_irqrestore(&task->task_state_lock, flags);
-
- complete(&task->completion);
-}
-
-static void sas_disc_task_done(struct sas_task *task)
-{
- if (!del_timer(&task->timer))
- return;
- complete(&task->completion);
-}
-
-#define SAS_DEV_TIMEOUT 10
-
-/**
- * sas_execute_task -- Basic task processing for discovery
- * @task: the task to be executed
- * @buffer: pointer to buffer to do I/O
- * @size: size of @buffer
- * @dma_dir: DMA direction. DMA_xxx
- */
-static int sas_execute_task(struct sas_task *task, void *buffer, int size,
- enum dma_data_direction dma_dir)
-{
- int res = 0;
- struct scatterlist *scatter = NULL;
- struct task_status_struct *ts = &task->task_status;
- int num_scatter = 0;
- int retries = 0;
- struct sas_internal *i =
- to_sas_internal(task->dev->port->ha->core.shost->transportt);
-
- if (dma_dir != DMA_NONE) {
- scatter = kzalloc(sizeof(*scatter), GFP_KERNEL);
- if (!scatter)
- goto out;
-
- sg_init_one(scatter, buffer, size);
- num_scatter = 1;
- }
-
- task->task_proto = task->dev->tproto;
- task->scatter = scatter;
- task->num_scatter = num_scatter;
- task->total_xfer_len = size;
- task->data_dir = dma_dir;
- task->task_done = sas_disc_task_done;
- if (dma_dir != DMA_NONE &&
- sas_protocol_ata(task->task_proto)) {
- task->num_scatter = dma_map_sg(task->dev->port->ha->dev,
- task->scatter,
- task->num_scatter,
- task->data_dir);
- }
-
- for (retries = 0; retries < 5; retries++) {
- task->task_state_flags = SAS_TASK_STATE_PENDING;
- init_completion(&task->completion);
-
- task->timer.data = (unsigned long) task;
- task->timer.function = sas_task_timedout;
- task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ;
- add_timer(&task->timer);
-
- res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
- if (res) {
- del_timer(&task->timer);
- SAS_DPRINTK("executing SAS discovery task failed:%d\n",
- res);
- goto ex_err;
- }
- wait_for_completion(&task->completion);
- res = -ECOMM;
- if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
- int res2;
- SAS_DPRINTK("task aborted, flags:0x%x\n",
- task->task_state_flags);
- res2 = i->dft->lldd_abort_task(task);
- SAS_DPRINTK("came back from abort task\n");
- if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
- if (res2 == TMF_RESP_FUNC_COMPLETE)
- continue; /* Retry the task */
- else
- goto ex_err;
- }
- }
- if (task->task_status.stat == SAM_STAT_BUSY ||
- task->task_status.stat == SAM_STAT_TASK_SET_FULL ||
- task->task_status.stat == SAS_QUEUE_FULL) {
- SAS_DPRINTK("task: q busy, sleeping...\n");
- schedule_timeout_interruptible(HZ);
- } else if (task->task_status.stat == SAM_STAT_CHECK_CONDITION) {
- struct scsi_sense_hdr shdr;
-
- if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size,
- &shdr)) {
- SAS_DPRINTK("couldn't normalize sense\n");
- continue;
- }
- if ((shdr.sense_key == 6 && shdr.asc == 0x29) ||
- (shdr.sense_key == 2 && shdr.asc == 4 &&
- shdr.ascq == 1)) {
- SAS_DPRINTK("device %016llx LUN: %016llx "
- "powering up or not ready yet, "
- "sleeping...\n",
- SAS_ADDR(task->dev->sas_addr),
- SAS_ADDR(task->ssp_task.LUN));
-
- schedule_timeout_interruptible(5*HZ);
- } else if (shdr.sense_key == 1) {
- res = 0;
- break;
- } else if (shdr.sense_key == 5) {
- break;
- } else {
- SAS_DPRINTK("dev %016llx LUN: %016llx "
- "sense key:0x%x ASC:0x%x ASCQ:0x%x"
- "\n",
- SAS_ADDR(task->dev->sas_addr),
- SAS_ADDR(task->ssp_task.LUN),
- shdr.sense_key,
- shdr.asc, shdr.ascq);
- }
- } else if (task->task_status.resp != SAS_TASK_COMPLETE ||
- task->task_status.stat != SAM_STAT_GOOD) {
- SAS_DPRINTK("task finished with resp:0x%x, "
- "stat:0x%x\n",
- task->task_status.resp,
- task->task_status.stat);
- goto ex_err;
- } else {
- res = 0;
- break;
- }
- }
-ex_err:
- if (dma_dir != DMA_NONE) {
- if (sas_protocol_ata(task->task_proto))
- dma_unmap_sg(task->dev->port->ha->dev,
- task->scatter, task->num_scatter,
- task->data_dir);
- kfree(scatter);
- }
-out:
- return res;
-}
-
-/* ---------- SATA ---------- */
-
static void sas_get_ata_command_set(struct domain_device *dev)
{
struct dev_to_host_fis *fis =
(struct dev_to_host_fis *) dev->frame_rcvd;
+ if (dev->dev_type == SATA_PENDING)
+ return;
+
if ((fis->sector_count == 1 && /* ATA */
fis->lbal == 1 &&
fis->lbam == 0 &&
dev->sata_dev.command_set = ATAPI_COMMAND_SET;
}
-/**
- * sas_issue_ata_cmd -- Basic SATA command processing for discovery
- * @dev: the device to send the command to
- * @command: the command register
- * @features: the features register
- * @buffer: pointer to buffer to do I/O
- * @size: size of @buffer
- * @dma_dir: DMA direction. DMA_xxx
- */
-static int sas_issue_ata_cmd(struct domain_device *dev, u8 command,
- u8 features, void *buffer, int size,
- enum dma_data_direction dma_dir)
-{
- int res = 0;
- struct sas_task *task;
- struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *)
- &dev->frame_rcvd[0];
-
- res = -ENOMEM;
- task = sas_alloc_task(GFP_KERNEL);
- if (!task)
- goto out;
-
- task->dev = dev;
-
- task->ata_task.fis.fis_type = 0x27;
- task->ata_task.fis.command = command;
- task->ata_task.fis.features = features;
- task->ata_task.fis.device = d2h_fis->device;
- task->ata_task.retry_count = 1;
-
- res = sas_execute_task(task, buffer, size, dma_dir);
-
- sas_free_task(task);
-out:
- return res;
-}
-
-#define ATA_IDENTIFY_DEV 0xEC
-#define ATA_IDENTIFY_PACKET_DEV 0xA1
-#define ATA_SET_FEATURES 0xEF
-#define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
-
-/**
- * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
- * @dev: STP/SATA device of interest (ATA/ATAPI)
- *
- * The LLDD has already been notified of this device, so that we can
- * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY
- * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
- * performance for this device.
- */
-static int sas_discover_sata_dev(struct domain_device *dev)
+void sas_probe_sata(struct asd_sas_port *port)
{
- int res;
- __le16 *identify_x;
- u8 command;
+ struct domain_device *dev, *n;
+ int err;
- identify_x = kzalloc(512, GFP_KERNEL);
- if (!identify_x)
- return -ENOMEM;
-
- if (dev->sata_dev.command_set == ATA_COMMAND_SET) {
- dev->sata_dev.identify_device = identify_x;
- command = ATA_IDENTIFY_DEV;
- } else {
- dev->sata_dev.identify_packet_device = identify_x;
- command = ATA_IDENTIFY_PACKET_DEV;
- }
+ mutex_lock(&port->ha->disco_mutex);
+ list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
+ if (!dev_is_sata(dev))
+ continue;
- res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
- DMA_FROM_DEVICE);
- if (res)
- goto out_err;
-
- /* lives on the media? */
- if (le16_to_cpu(identify_x[0]) & 4) {
- /* incomplete response */
- SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
- "dev %llx\n", SAS_ADDR(dev->sas_addr));
- if (!(identify_x[83] & cpu_to_le16(1<<6)))
- goto cont1;
- res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES,
- ATA_FEATURE_PUP_STBY_SPIN_UP,
- NULL, 0, DMA_NONE);
- if (res)
- goto cont1;
-
- schedule_timeout_interruptible(5*HZ); /* More time? */
- res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
- DMA_FROM_DEVICE);
- if (res)
- goto out_err;
+ err = sas_ata_init_host_and_port(dev);
+ if (err)
+ sas_fail_probe(dev, __func__, err);
+ else
+ ata_sas_async_port_init(dev->sata_dev.ap);
}
-cont1:
- /* XXX Hint: register this SATA device with SATL.
- When this returns, dev->sata_dev->lu is alive and
- present.
- sas_satl_register_dev(dev);
- */
+ mutex_unlock(&port->ha->disco_mutex);
- sas_fill_in_rphy(dev, dev->rphy);
+ list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
+ if (!dev_is_sata(dev))
+ continue;
- return 0;
-out_err:
- dev->sata_dev.identify_packet_device = NULL;
- dev->sata_dev.identify_device = NULL;
- kfree(identify_x);
- return res;
-}
+ sas_ata_wait_eh(dev);
-static int sas_discover_sata_pm(struct domain_device *dev)
-{
- return -ENODEV;
+ /* if libata could not bring the link up, don't surface
+ * the device
+ */
+ if (ata_dev_disabled(sas_to_ata_dev(dev)))
+ sas_fail_probe(dev, __func__, -ENODEV);
+ }
}
/**
* sas_discover_sata -- discover an STP/SATA domain device
* @dev: pointer to struct domain_device of interest
*
- * First we notify the LLDD of this device, so we can send frames to
- * it. Then depending on the type of device we call the appropriate
- * discover functions. Once device discover is done, we notify the
- * LLDD so that it can fine-tune its parameters for the device, by
- * removing it and then adding it. That is, the second time around,
- * the driver would have certain fields, that it is looking at, set.
- * Finally we initialize the kobj so that the device can be added to
- * the system at registration time. Devices directly attached to a HA
- * port, have no parents. All other devices do, and should have their
- * "parent" pointer set appropriately before calling this function.
+ * Devices directly attached to a HA port, have no parents. All other
+ * devices do, and should have their "parent" pointer set appropriately
+ * before calling this function.
*/
int sas_discover_sata(struct domain_device *dev)
{
int res;
+ if (dev->dev_type == SATA_PM)
+ return -ENODEV;
+
sas_get_ata_command_set(dev);
+ sas_fill_in_rphy(dev, dev->rphy);
res = sas_notify_lldd_dev_found(dev);
if (res)
return res;
- switch (dev->dev_type) {
- case SATA_DEV:
- res = sas_discover_sata_dev(dev);
- break;
- case SATA_PM:
- res = sas_discover_sata_pm(dev);
- break;
- default:
- break;
- }
- sas_notify_lldd_dev_gone(dev);
- if (!res) {
- sas_notify_lldd_dev_found(dev);
- res = sas_rphy_add(dev->rphy);
- }
-
- return res;
+ sas_discover_event(dev->port, DISCE_PROBE);
+ return 0;
}
-void sas_ata_strategy_handler(struct Scsi_Host *shost)
+static void async_sas_ata_eh(void *data, async_cookie_t cookie)
{
- struct scsi_device *sdev;
+ struct domain_device *dev = data;
+ struct ata_port *ap = dev->sata_dev.ap;
+ struct sas_ha_struct *ha = dev->port->ha;
- shost_for_each_device(sdev, shost) {
- struct domain_device *ddev = sdev_to_domain_dev(sdev);
- struct ata_port *ap = ddev->sata_dev.ap;
+ /* hold a reference over eh since we may be racing with final
+ * remove once all commands are completed
+ */
+ kref_get(&dev->kref);
+ sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
+ ata_scsi_port_error_handler(ha->core.shost, ap);
+ sas_put_device(dev);
+}
- if (!dev_is_sata(ddev))
- continue;
+static bool sas_ata_dev_eh_valid(struct domain_device *dev)
+{
+ struct ata_port *ap;
- ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler");
- ata_scsi_port_error_handler(shost, ap);
- }
+ if (!dev_is_sata(dev))
+ return false;
+ ap = dev->sata_dev.ap;
+ /* consume fully initialized ata ports */
+ smp_rmb();
+ return !!ap;
}
-int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task,
- enum blk_eh_timer_return *rtn)
+void sas_ata_strategy_handler(struct Scsi_Host *shost)
{
- struct domain_device *ddev = cmd_to_domain_dev(cmd);
+ struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
+ LIST_HEAD(async);
+ int i;
+
+ /* it's ok to defer revalidation events during ata eh, these
+ * disks are in one of three states:
+ * 1/ present for initial domain discovery, and these
+ * resets will cause bcn flutters
+ * 2/ hot removed, we'll discover that after eh fails
+ * 3/ hot added after initial discovery, lost the race, and need
+ * to catch the next train.
+ */
+ sas_disable_revalidation(sas_ha);
- if (!dev_is_sata(ddev) || task)
- return 0;
+ spin_lock_irq(&sas_ha->phy_port_lock);
+ for (i = 0; i < sas_ha->num_phys; i++) {
+ struct asd_sas_port *port = sas_ha->sas_port[i];
+ struct domain_device *dev;
- /* we're a sata device with no task, so this must be a libata
- * eh timeout. Ideally should hook into libata timeout
- * handling, but there's no point, it just wants to activate
- * the eh thread */
- *rtn = BLK_EH_NOT_HANDLED;
- return 1;
+ spin_lock(&port->dev_list_lock);
+ list_for_each_entry(dev, &port->dev_list, dev_list_node) {
+ if (!sas_ata_dev_eh_valid(dev))
+ continue;
+ async_schedule_domain(async_sas_ata_eh, dev, &async);
+ }
+ spin_unlock(&port->dev_list_lock);
+ }
+ spin_unlock_irq(&sas_ha->phy_port_lock);
+
+ async_synchronize_full_domain(&async);
+
+ sas_enable_revalidation(sas_ha);
}
-int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
- struct list_head *done_q)
+void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
+ struct list_head *done_q)
{
- int rtn = 0;
struct scsi_cmnd *cmd, *n;
- struct ata_port *ap;
+ struct domain_device *eh_dev;
do {
LIST_HEAD(sata_q);
-
- ap = NULL;
+ eh_dev = NULL;
list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
struct domain_device *ddev = cmd_to_domain_dev(cmd);
if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
continue;
- if (ap && ap != ddev->sata_dev.ap)
+ if (eh_dev && eh_dev != ddev)
continue;
- ap = ddev->sata_dev.ap;
- rtn = 1;
+ eh_dev = ddev;
list_move(&cmd->eh_entry, &sata_q);
}
if (!list_empty(&sata_q)) {
- ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata cmd error handler\n");
+ struct ata_port *ap = eh_dev->sata_dev.ap;
+
+ sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n");
ata_scsi_cmd_error_handler(shost, ap, &sata_q);
/*
* ata's error handler may leave the cmd on the list
while (!list_empty(&sata_q))
list_del_init(sata_q.next);
}
- } while (ap);
+ } while (eh_dev);
+}
+
+void sas_ata_schedule_reset(struct domain_device *dev)
+{
+ struct ata_eh_info *ehi;
+ struct ata_port *ap;
+ unsigned long flags;
+
+ if (!dev_is_sata(dev))
+ return;
+
+ ap = dev->sata_dev.ap;
+ ehi = &ap->link.eh_info;
+
+ spin_lock_irqsave(ap->lock, flags);
+ ehi->err_mask |= AC_ERR_TIMEOUT;
+ ehi->action |= ATA_EH_RESET;
+ ata_port_schedule_eh(ap);
+ spin_unlock_irqrestore(ap->lock, flags);
+}
+EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
+
+void sas_ata_wait_eh(struct domain_device *dev)
+{
+ struct ata_port *ap;
+
+ if (!dev_is_sata(dev))
+ return;
- return rtn;
+ ap = dev->sata_dev.ap;
+ ata_port_wait_eh(ap);
}
projects / cascardo / linux.git / blobdiff