v4.19.13 snapshot.
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
new file mode 100644
index 0000000..64a958a
--- /dev/null
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -0,0 +1,874 @@
+/*
+ * Support for SATA devices on Serial Attached SCSI (SAS) controllers
+ *
+ * Copyright (C) 2006 IBM Corporation
+ *
+ * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#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"
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_sas.h>
+#include "../scsi_sas_internal.h"
+#include "../scsi_transport_api.h"
+#include <scsi/scsi_eh.h>
+
+static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
+{
+ /* Cheesy attempt to translate SAS errors into ATA. Hah! */
+
+ /* transport error */
+ if (ts->resp == SAS_TASK_UNDELIVERED)
+ return AC_ERR_ATA_BUS;
+
+ /* ts->resp == SAS_TASK_COMPLETE */
+ /* task delivered, what happened afterwards? */
+ switch (ts->stat) {
+ case SAS_DEV_NO_RESPONSE:
+ return AC_ERR_TIMEOUT;
+
+ case SAS_INTERRUPTED:
+ case SAS_PHY_DOWN:
+ case SAS_NAK_R_ERR:
+ return AC_ERR_ATA_BUS;
+
+
+ case SAS_DATA_UNDERRUN:
+ /*
+ * Some programs that use the taskfile interface
+ * (smartctl in particular) can cause underrun
+ * problems. Ignore these errors, perhaps at our
+ * peril.
+ */
+ return 0;
+
+ case SAS_DATA_OVERRUN:
+ case SAS_QUEUE_FULL:
+ case SAS_DEVICE_UNKNOWN:
+ case SAS_SG_ERR:
+ return AC_ERR_INVALID;
+
+ case SAS_OPEN_TO:
+ case SAS_OPEN_REJECT:
+ SAS_DPRINTK("%s: Saw error %d. What to do?\n",
+ __func__, ts->stat);
+ return AC_ERR_OTHER;
+
+ case SAM_STAT_CHECK_CONDITION:
+ case SAS_ABORTED_TASK:
+ return AC_ERR_DEV;
+
+ case SAS_PROTO_RESPONSE:
+ /* This means the ending_fis has the error
+ * value; return 0 here to collect it */
+ return 0;
+ default:
+ return 0;
+ }
+}
+
+static void sas_ata_task_done(struct sas_task *task)
+{
+ struct ata_queued_cmd *qc = task->uldd_task;
+ 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 = 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;
+
+ 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;
+ }
+ }
+
+ if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
+ ((stat->stat == SAM_STAT_CHECK_CONDITION &&
+ dev->sata_dev.class == ATA_DEV_ATAPI))) {
+ memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
+
+ if (!link->sactive) {
+ qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
+ } else {
+ link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
+ if (unlikely(link->eh_info.err_mask))
+ qc->flags |= ATA_QCFLAG_FAILED;
+ }
+ } else {
+ ac = sas_to_ata_err(stat);
+ if (ac) {
+ SAS_DPRINTK("%s: SAS error %x\n", __func__,
+ stat->stat);
+ /* We saw a SAS error. Send a vague error. */
+ if (!link->sactive) {
+ qc->err_mask = ac;
+ } else {
+ link->eh_info.err_mask |= AC_ERR_DEV;
+ qc->flags |= ATA_QCFLAG_FAILED;
+ }
+
+ dev->sata_dev.fis[3] = 0x04; /* status err */
+ dev->sata_dev.fis[2] = ATA_ERR;
+ }
+ }
+
+ qc->lldd_task = NULL;
+ ata_qc_complete(qc);
+ spin_unlock_irqrestore(ap->lock, flags);
+
+qc_already_gone:
+ sas_free_task(task);
+}
+
+static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
+{
+ struct sas_task *task;
+ 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);
+
+ /* TODO: we should try to remove that unlock */
+ spin_unlock(ap->lock);
+
+ /* If the device fell off, no sense in issuing commands */
+ if (test_bit(SAS_DEV_GONE, &dev->state))
+ goto out;
+
+ task = sas_alloc_task(GFP_ATOMIC);
+ if (!task)
+ goto out;
+ task->dev = dev;
+ task->task_proto = SAS_PROTOCOL_STP;
+ task->task_done = sas_ata_task_done;
+
+ if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
+ qc->tf.command == ATA_CMD_FPDMA_READ ||
+ qc->tf.command == ATA_CMD_FPDMA_RECV ||
+ qc->tf.command == ATA_CMD_FPDMA_SEND ||
+ qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
+ /* Need to zero out the tag libata assigned us */
+ qc->tf.nsect = 0;
+ }
+
+ ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis);
+ task->uldd_task = qc;
+ if (ata_is_atapi(qc->tf.protocol)) {
+ memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
+ task->total_xfer_len = qc->nbytes;
+ task->num_scatter = qc->n_elem;
+ } else {
+ for_each_sg(qc->sg, sg, qc->n_elem, si)
+ xfer += sg_dma_len(sg);
+
+ task->total_xfer_len = xfer;
+ task->num_scatter = si;
+ }
+
+ task->data_dir = qc->dma_dir;
+ task->scatter = qc->sg;
+ task->ata_task.retry_count = 1;
+ task->task_state_flags = SAS_TASK_STATE_PENDING;
+ qc->lldd_task = task;
+
+ task->ata_task.use_ncq = ata_is_ncq(qc->tf.protocol);
+ task->ata_task.dma_xfer = ata_is_dma(qc->tf.protocol);
+
+ if (qc->scsicmd)
+ ASSIGN_SAS_TASK(qc->scsicmd, task);
+
+ ret = i->dft->lldd_execute_task(task, GFP_ATOMIC);
+ if (ret) {
+ SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);
+
+ if (qc->scsicmd)
+ ASSIGN_SAS_TASK(qc->scsicmd, NULL);
+ sas_free_task(task);
+ qc->lldd_task = NULL;
+ ret = AC_ERR_SYSTEM;
+ }
+
+ out:
+ spin_lock(ap->lock);
+ return ret;
+}
+
+static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
+{
+ struct domain_device *dev = qc->ap->private_data;
+
+ ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf);
+ return true;
+}
+
+static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
+{
+ return to_sas_internal(dev->port->ha->core.shost->transportt);
+}
+
+static int 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 |= SAS_SATA_DEV;
+
+ if (phy->attached_dev_type == SAS_SATA_PENDING)
+ dev->dev_type = SAS_SATA_PENDING;
+ else {
+ int res;
+
+ dev->dev_type = SAS_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));
+ dev->sata_dev.class = 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 != SAS_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 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];
+
+ res = sas_ex_phy_discover(ex_dev, phy->number);
+ sas_put_local_phy(phy);
+
+ /* 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 SAS_SATA_PENDING:
+ return 0;
+ case SAS_END_DEVICE:
+ if (ex_phy->attached_sata_dev)
+ return sas_ata_clear_pending(dev, ex_phy);
+ /* fall through */
+ default:
+ return -ENODEV;
+ }
+}
+
+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;
+ }
+}
+
+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_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 = dev_to_sas_internal(dev);
+
+ res = i->dft->lldd_I_T_nexus_reset(dev);
+ if (res == -ENODEV)
+ return res;
+
+ 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);
+
+ *class = dev->sata_dev.class;
+
+ 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:
+ sas_free_task(task);
+}
+
+static void sas_ata_post_internal(struct ata_queued_cmd *qc)
+{
+ if (qc->flags & ATA_QCFLAG_FAILED)
+ qc->err_mask |= AC_ERR_OTHER;
+
+ if (qc->err_mask) {
+ /*
+ * 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;
+
+ qc->lldd_task = NULL;
+ 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 void sas_ata_sched_eh(struct ata_port *ap)
+{
+ struct domain_device *dev = ap->private_data;
+ struct sas_ha_struct *ha = dev->port->ha;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ha->lock, flags);
+ if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
+ ha->eh_active++;
+ ata_std_sched_eh(ap);
+ spin_unlock_irqrestore(&ha->lock, flags);
+}
+
+void sas_ata_end_eh(struct ata_port *ap)
+{
+ struct domain_device *dev = ap->private_data;
+ struct sas_ha_struct *ha = dev->port->ha;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ha->lock, flags);
+ if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
+ ha->eh_active--;
+ spin_unlock_irqrestore(&ha->lock, flags);
+}
+
+static struct ata_port_operations sas_sata_ops = {
+ .prereset = ata_std_prereset,
+ .hardreset = sas_ata_hard_reset,
+ .postreset = ata_std_postreset,
+ .error_handler = ata_std_error_handler,
+ .post_internal_cmd = sas_ata_post_internal,
+ .qc_defer = ata_std_qc_defer,
+ .qc_prep = ata_noop_qc_prep,
+ .qc_issue = sas_ata_qc_issue,
+ .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,
+ .sched_eh = sas_ata_sched_eh,
+ .end_eh = sas_ata_end_eh,
+};
+
+static struct ata_port_info sata_port_info = {
+ .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ |
+ ATA_FLAG_SAS_HOST | ATA_FLAG_FPDMA_AUX,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &sas_sata_ops
+};
+
+int sas_ata_init(struct domain_device *found_dev)
+{
+ struct sas_ha_struct *ha = found_dev->port->ha;
+ struct Scsi_Host *shost = ha->core.shost;
+ struct ata_host *ata_host;
+ struct ata_port *ap;
+ int rc;
+
+ ata_host = kzalloc(sizeof(*ata_host), GFP_KERNEL);
+ if (!ata_host) {
+ SAS_DPRINTK("ata host alloc failed.\n");
+ return -ENOMEM;
+ }
+
+ ata_host_init(ata_host, ha->dev, &sas_sata_ops);
+
+ ap = ata_sas_port_alloc(ata_host, &sata_port_info, shost);
+ if (!ap) {
+ SAS_DPRINTK("ata_sas_port_alloc failed.\n");
+ rc = -ENODEV;
+ goto free_host;
+ }
+
+ ap->private_data = found_dev;
+ ap->cbl = ATA_CBL_SATA;
+ ap->scsi_host = shost;
+ rc = ata_sas_port_init(ap);
+ if (rc)
+ goto destroy_port;
+
+ rc = ata_sas_tport_add(ata_host->dev, ap);
+ if (rc)
+ goto destroy_port;
+
+ found_dev->sata_dev.ata_host = ata_host;
+ found_dev->sata_dev.ap = ap;
+
+ return 0;
+
+destroy_port:
+ ata_sas_port_destroy(ap);
+free_host:
+ ata_host_put(ata_host);
+ return rc;
+}
+
+void sas_ata_task_abort(struct sas_task *task)
+{
+ struct ata_queued_cmd *qc = task->uldd_task;
+ struct completion *waiting;
+
+ /* Bounce SCSI-initiated commands to the SCSI EH */
+ if (qc->scsicmd) {
+ struct request_queue *q = qc->scsicmd->device->request_queue;
+ unsigned long flags;
+
+ spin_lock_irqsave(q->queue_lock, flags);
+ blk_abort_request(qc->scsicmd->request);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+ return;
+ }
+
+ /* Internal command, fake a timeout and complete. */
+ qc->flags &= ~ATA_QCFLAG_ACTIVE;
+ qc->flags |= ATA_QCFLAG_FAILED;
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ waiting = qc->private_data;
+ complete(waiting);
+}
+
+static int sas_get_ata_command_set(struct domain_device *dev)
+{
+ struct dev_to_host_fis *fis =
+ (struct dev_to_host_fis *) dev->frame_rcvd;
+ struct ata_taskfile tf;
+
+ if (dev->dev_type == SAS_SATA_PENDING)
+ return ATA_DEV_UNKNOWN;
+
+ ata_tf_from_fis((const u8 *)fis, &tf);
+
+ return ata_dev_classify(&tf);
+}
+
+void sas_probe_sata(struct asd_sas_port *port)
+{
+ struct domain_device *dev, *n;
+
+ mutex_lock(&port->ha->disco_mutex);
+ list_for_each_entry(dev, &port->disco_list, disco_list_node) {
+ if (!dev_is_sata(dev))
+ continue;
+
+ ata_sas_async_probe(dev->sata_dev.ap);
+ }
+ mutex_unlock(&port->ha->disco_mutex);
+
+ list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
+ if (!dev_is_sata(dev))
+ continue;
+
+ sas_ata_wait_eh(dev);
+
+ /* 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);
+ }
+
+}
+
+static void sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func)
+{
+ struct domain_device *dev, *n;
+
+ list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
+ if (!dev_is_sata(dev))
+ continue;
+
+ sas_ata_wait_eh(dev);
+
+ /* if libata failed to power manage the device, tear it down */
+ if (ata_dev_disabled(sas_to_ata_dev(dev)))
+ sas_fail_probe(dev, func, -ENODEV);
+ }
+}
+
+void sas_suspend_sata(struct asd_sas_port *port)
+{
+ struct domain_device *dev;
+
+ mutex_lock(&port->ha->disco_mutex);
+ list_for_each_entry(dev, &port->dev_list, dev_list_node) {
+ struct sata_device *sata;
+
+ if (!dev_is_sata(dev))
+ continue;
+
+ sata = &dev->sata_dev;
+ if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND)
+ continue;
+
+ ata_sas_port_suspend(sata->ap);
+ }
+ mutex_unlock(&port->ha->disco_mutex);
+
+ sas_ata_flush_pm_eh(port, __func__);
+}
+
+void sas_resume_sata(struct asd_sas_port *port)
+{
+ struct domain_device *dev;
+
+ mutex_lock(&port->ha->disco_mutex);
+ list_for_each_entry(dev, &port->dev_list, dev_list_node) {
+ struct sata_device *sata;
+
+ if (!dev_is_sata(dev))
+ continue;
+
+ sata = &dev->sata_dev;
+ if (sata->ap->pm_mesg.event == PM_EVENT_ON)
+ continue;
+
+ ata_sas_port_resume(sata->ap);
+ }
+ mutex_unlock(&port->ha->disco_mutex);
+
+ sas_ata_flush_pm_eh(port, __func__);
+}
+
+/**
+ * sas_discover_sata - discover an STP/SATA domain device
+ * @dev: pointer to struct domain_device of interest
+ *
+ * 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 == SAS_SATA_PM)
+ return -ENODEV;
+
+ dev->sata_dev.class = sas_get_ata_command_set(dev);
+ sas_fill_in_rphy(dev, dev->rphy);
+
+ res = sas_notify_lldd_dev_found(dev);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+static void async_sas_ata_eh(void *data, async_cookie_t cookie)
+{
+ struct domain_device *dev = data;
+ struct ata_port *ap = dev->sata_dev.ap;
+ struct sas_ha_struct *ha = dev->port->ha;
+
+ sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
+ ata_scsi_port_error_handler(ha->core.shost, ap);
+ sas_put_device(dev);
+}
+
+void sas_ata_strategy_handler(struct Scsi_Host *shost)
+{
+ struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
+ ASYNC_DOMAIN_EXCLUSIVE(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);
+
+ 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;
+
+ spin_lock(&port->dev_list_lock);
+ list_for_each_entry(dev, &port->dev_list, dev_list_node) {
+ if (!dev_is_sata(dev))
+ continue;
+
+ /* hold a reference over eh since we may be
+ * racing with final remove once all commands
+ * are completed
+ */
+ kref_get(&dev->kref);
+
+ 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);
+}
+
+void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
+ struct list_head *done_q)
+{
+ struct scsi_cmnd *cmd, *n;
+ struct domain_device *eh_dev;
+
+ do {
+ LIST_HEAD(sata_q);
+ 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 (eh_dev && eh_dev != ddev)
+ continue;
+ eh_dev = ddev;
+ list_move(&cmd->eh_entry, &sata_q);
+ }
+
+ if (!list_empty(&sata_q)) {
+ 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
+ * so make sure they don't remain on a stack list
+ * about to go out of scope.
+ *
+ * This looks strange, since the commands are
+ * now part of no list, but the next error
+ * action will be ata_port_error_handler()
+ * which takes no list and sweeps them up
+ * anyway from the ata tag array.
+ */
+ while (!list_empty(&sata_q))
+ list_del_init(sata_q.next);
+ }
+ } 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;
+
+ ap = dev->sata_dev.ap;
+ ata_port_wait_eh(ap);
+}