* USA
*/
+#include <linux/scatterlist.h>
+
#include <scsi/sas_ata.h>
#include "sas_internal.h"
#include <scsi/scsi_host.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)
{
struct domain_device *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;
enum ata_completion_errors ac;
unsigned long flags;
goto qc_already_gone;
dev = qc->ap->private_data;
+ sas_ha = dev->port->ha;
spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) {
}
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);
+
qc_already_gone:
list_del_init(&task->list);
sas_free_task(task);
qc->tf.nsect = 0;
}
- ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
+ ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis);
task->uldd_task = qc;
- if (is_atapi_taskfile(&qc->tf)) {
+ 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 + qc->pad_len;
task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
case ATA_PROT_NCQ:
task->ata_task.use_ncq = 1;
/* fall through */
- case ATA_PROT_ATAPI_DMA:
+ case ATAPI_PROT_DMA:
case ATA_PROT_DMA:
task->ata_task.dma_xfer = 1;
break;
}
+ if (qc->scsicmd)
+ ASSIGN_SAS_TASK(qc->scsicmd, task);
+
if (sas_ha->lldd_max_execute_num < 2)
res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
else
if (res) {
SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
+ if (qc->scsicmd)
+ ASSIGN_SAS_TASK(qc->scsicmd, NULL);
sas_free_task(task);
return AC_ERR_SYSTEM;
}
switch (dev->sata_dev.command_set) {
case ATA_COMMAND_SET:
SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
- ap->device[0].class = ATA_DEV_ATA;
+ ap->link.device[0].class = ATA_DEV_ATA;
break;
case ATAPI_COMMAND_SET:
SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
- ap->device[0].class = ATA_DEV_ATAPI;
+ ap->link.device[0].class = ATA_DEV_ATAPI;
break;
default:
SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
__FUNCTION__,
dev->sata_dev.command_set);
- ap->device[0].class = ATA_DEV_ATA;
+ ap->link.device[0].class = ATA_DEV_UNKNOWN;
break;
}
* ought to abort the task.
*/
struct sas_task *task = qc->lldd_task;
- struct domain_device *dev = qc->ap->private_data;
+ 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);
}
-
- sas_phy_reset(dev->port->phy, 1);
}
}
memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
}
-static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
+static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
u32 val)
{
struct domain_device *dev = ap->private_data;
dev->sata_dev.serror = val;
break;
case SCR_ACTIVE:
- dev->sata_dev.ap->sactive = val;
+ dev->sata_dev.ap->link.sactive = val;
break;
+ default:
+ return -EINVAL;
}
+ return 0;
}
-static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
+static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
+ u32 *val)
{
struct domain_device *dev = ap->private_data;
SAS_DPRINTK("STUB %s\n", __FUNCTION__);
switch (sc_reg_in) {
case SCR_STATUS:
- return dev->sata_dev.sstatus;
+ *val = dev->sata_dev.sstatus;
+ return 0;
case SCR_CONTROL:
- return dev->sata_dev.scontrol;
+ *val = dev->sata_dev.scontrol;
+ return 0;
case SCR_ERROR:
- return dev->sata_dev.serror;
+ *val = dev->sata_dev.serror;
+ return 0;
case SCR_ACTIVE:
- return dev->sata_dev.ap->sactive;
+ *val = dev->sata_dev.ap->link.sactive;
+ return 0;
default:
- return 0xffffffffU;
+ return -EINVAL;
}
}
static struct ata_port_operations sas_sata_ops = {
- .port_disable = ata_port_disable,
.check_status = sas_ata_check_status,
.check_altstatus = sas_ata_check_status,
.dev_select = ata_noop_dev_select,
struct ata_port *ap;
ata_host_init(&found_dev->sata_dev.ata_host,
- &ha->pcidev->dev,
+ ha->dev,
sata_port_info.flags,
&sas_sata_ops);
ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
return 0;
}
+
+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) {
+ scsi_req_abort_cmd(qc->scsicmd);
+ scsi_schedule_eh(qc->scsicmd->device->host);
+ 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 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 = -ETASK;
+ 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_BUSY ||
+ task->task_status.stat == SAM_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_CHECK_COND) {
+ 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_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 ((fis->sector_count == 1 && /* ATA */
+ fis->lbal == 1 &&
+ fis->lbam == 0 &&
+ fis->lbah == 0 &&
+ fis->device == 0)
+ ||
+ (fis->sector_count == 0 && /* CE-ATA (mATA) */
+ fis->lbal == 0 &&
+ fis->lbam == 0xCE &&
+ fis->lbah == 0xAA &&
+ (fis->device & ~0x10) == 0))
+
+ dev->sata_dev.command_set = ATA_COMMAND_SET;
+
+ else if ((fis->interrupt_reason == 1 && /* ATAPI */
+ fis->lbal == 1 &&
+ fis->byte_count_low == 0x14 &&
+ fis->byte_count_high == 0xEB &&
+ (fis->device & ~0x10) == 0))
+
+ dev->sata_dev.command_set = ATAPI_COMMAND_SET;
+
+ else if ((fis->sector_count == 1 && /* SEMB */
+ fis->lbal == 1 &&
+ fis->lbam == 0x3C &&
+ fis->lbah == 0xC3 &&
+ fis->device == 0)
+ ||
+ (fis->interrupt_reason == 1 && /* SATA PM */
+ fis->lbal == 1 &&
+ fis->byte_count_low == 0x69 &&
+ fis->byte_count_high == 0x96 &&
+ (fis->device & ~0x10) == 0))
+
+ /* Treat it as a superset? */
+ 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;
+}
+
+static void sas_sata_propagate_sas_addr(struct domain_device *dev)
+{
+ unsigned long flags;
+ struct asd_sas_port *port = dev->port;
+ struct asd_sas_phy *phy;
+
+ BUG_ON(dev->parent);
+
+ memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
+ spin_lock_irqsave(&port->phy_list_lock, flags);
+ list_for_each_entry(phy, &port->phy_list, port_phy_el)
+ memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
+ spin_unlock_irqrestore(&port->phy_list_lock, flags);
+}
+
+#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)
+{
+ int res;
+ __le16 *identify_x;
+ u8 command;
+
+ 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;
+ }
+
+ 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 (!le16_to_cpu(identify_x[83] & (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;
+ }
+cont1:
+ /* Get WWN */
+ if (dev->port->oob_mode != SATA_OOB_MODE) {
+ memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr,
+ SAS_ADDR_SIZE);
+ } else if (dev->sata_dev.command_set == ATA_COMMAND_SET &&
+ (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000)
+ == 0x5000) {
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ dev->sas_addr[2*i] =
+ (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8;
+ dev->sas_addr[2*i+1] =
+ le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF;
+ }
+ }
+ sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
+ if (!dev->parent)
+ sas_sata_propagate_sas_addr(dev);
+
+ /* XXX Hint: register this SATA device with SATL.
+ When this returns, dev->sata_dev->lu is alive and
+ present.
+ sas_satl_register_dev(dev);
+ */
+
+ sas_fill_in_rphy(dev, dev->rphy);
+
+ return 0;
+out_err:
+ dev->sata_dev.identify_packet_device = NULL;
+ dev->sata_dev.identify_device = NULL;
+ kfree(identify_x);
+ return res;
+}
+
+static int sas_discover_sata_pm(struct domain_device *dev)
+{
+ return -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.
+ */
+int sas_discover_sata(struct domain_device *dev)
+{
+ int res;
+
+ sas_get_ata_command_set(dev);
+
+ 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;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff