libsas: use ata_dev_classify()

Use the ata device class from libata in libsas instead of checking
the supported command set and switch to using ata_dev_classify()
instead of our own method.

Cc: Tejun Heo <tj@kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

7 files changed, 25 insertions, 74 deletions

diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c
index 59b86e260ce9..7abbe42e862e 100644
--- a/drivers/scsi/aic94xx/aic94xx_task.c
+++ b/drivers/scsi/aic94xx/aic94xx_task.c
@@ -373,10 +373,10 @@ static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
 
         if (unlikely(task->ata_task.device_control_reg_update))
                 scb->header.opcode = CONTROL_ATA_DEV;
-        else if (dev->sata_dev.command_set == ATA_COMMAND_SET)
-                scb->header.opcode = INITIATE_ATA_TASK;
-        else
+        else if (dev->sata_dev.class == ATA_DEV_ATAPI)
                 scb->header.opcode = INITIATE_ATAPI_TASK;
+        else
+                scb->header.opcode = INITIATE_ATA_TASK;
 
         scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
         if (dev->port->oob_mode == SAS_OOB_MODE)
@@ -387,7 +387,7 @@ static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
         if (likely(!task->ata_task.device_control_reg_update))
                 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
         scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
-        if (dev->sata_dev.command_set == ATAPI_COMMAND_SET)
+        if (dev->sata_dev.class == ATA_DEV_ATAPI)
                 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
                        16);
         scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
@@ -399,7 +399,7 @@ static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
                 if (task->ata_task.dma_xfer)
                         flags |= DATA_XFER_MODE_DMA;
                 if (task->ata_task.use_ncq &&
-                    dev->sata_dev.command_set != ATAPI_COMMAND_SET)
+                    dev->sata_dev.class != ATA_DEV_ATAPI)
                         flags |= ATA_Q_TYPE_NCQ;
                 flags |= data_dir_flags[task->data_dir];
                 scb->ata_task.ata_flags = flags;
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 56e38096f0c4..cfd0084f1cd2 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -694,7 +694,7 @@ sci_io_request_construct_sata(struct isci_request *ireq,
         }
 
         /* ATAPI */
-        if (dev->sata_dev.command_set == ATAPI_COMMAND_SET &&
+        if (dev->sata_dev.class == ATA_DEV_ATAPI &&
             task->ata_task.fis.command == ATA_CMD_PACKET) {
                 sci_atapi_construct(ireq);
                 return SCI_SUCCESS;
@@ -2980,7 +2980,7 @@ static void sci_request_started_state_enter(struct sci_base_state_machine *sm)
                 state = SCI_REQ_SMP_WAIT_RESP;
         } else if (task && sas_protocol_ata(task->task_proto) &&
                    !task->ata_task.use_ncq) {
-                if (dev->sata_dev.command_set == ATAPI_COMMAND_SET &&
+                if (dev->sata_dev.class == ATA_DEV_ATAPI &&
                         task->ata_task.fis.command == ATA_CMD_PACKET) {
                         state = SCI_REQ_ATAPI_WAIT_H2D;
                 } else if (task->data_dir == DMA_NONE) {
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 766098af4eb7..9f68db7ed5f1 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -138,7 +138,7 @@ static void sas_ata_task_done(struct sas_task *task)
 
         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))) {
+              dev->sata_dev.class == ATA_DEV_ATAPI))) {
                 memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
 
                 if (!link->sactive) {
@@ -278,7 +278,7 @@ 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);
+static int sas_get_ata_command_set(struct domain_device *dev);
 
 int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
 {
@@ -303,8 +303,7 @@ int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
                 }
                 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);
+                dev->sata_dev.class = sas_get_ata_command_set(dev);
         }
         return 0;
 }
@@ -425,18 +424,7 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
         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:
-                *class = ATA_DEV_ATA;
-                break;
-        case ATAPI_COMMAND_SET:
-                *class = ATA_DEV_ATAPI;
-                break;
-        }
+        *class = dev->sata_dev.class;
 
         ap->cbl = ATA_CBL_SATA;
         return ret;
@@ -626,50 +614,18 @@ void sas_ata_task_abort(struct sas_task *task)
         complete(waiting);
 }
 
-static void sas_get_ata_command_set(struct domain_device *dev)
+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;
+                return ATA_DEV_UNKNOWN;
+
+        ata_tf_from_fis((const u8 *)fis, &tf);
 
-        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;
+        return ata_dev_classify(&tf);
 }
 
 void sas_probe_sata(struct asd_sas_port *port)
@@ -775,7 +731,7 @@ int sas_discover_sata(struct domain_device *dev)
         if (dev->dev_type == SAS_SATA_PM)
                 return -ENODEV;
 
-        sas_get_ata_command_set(dev);
+        dev->sata_dev.class = sas_get_ata_command_set(dev);
         sas_fill_in_rphy(dev, dev->rphy);
 
         res = sas_notify_lldd_dev_found(dev);
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index ac52f7c99513..48a493cd285a 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -479,7 +479,7 @@ static int mvs_task_prep_ata(struct mvs_info *mvi,
 
         if (task->ata_task.use_ncq)
                 flags |= MCH_FPDMA;
-        if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) {
+        if (dev->sata_dev.class == ATA_DEV_ATAPI) {
                 if (task->ata_task.fis.command != ATA_CMD_ID_ATAPI)
                         flags |= MCH_ATAPI;
         }
@@ -546,7 +546,7 @@ static int mvs_task_prep_ata(struct mvs_info *mvi,
                 task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
         /* fill in command FIS and ATAPI CDB */
         memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
-        if (dev->sata_dev.command_set == ATAPI_COMMAND_SET)
+        if (dev->sata_dev.class == ATA_DEV_ATAPI)
                 memcpy(buf_cmd + STP_ATAPI_CMD,
                         task->ata_task.atapi_packet, 16);
 
diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c
index 933f21471951..96dcc097a463 100644
--- a/drivers/scsi/pm8001/pm8001_hwi.c
+++ b/drivers/scsi/pm8001/pm8001_hwi.c
@@ -4367,7 +4367,7 @@ static int pm8001_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
                         PM8001_IO_DBG(pm8001_ha, pm8001_printk("PIO\n"));
                 }
                 if (task->ata_task.use_ncq &&
-                        dev->sata_dev.command_set != ATAPI_COMMAND_SET) {
+                        dev->sata_dev.class != ATA_DEV_ATAPI) {
                         ATAP = 0x07; /* FPDMA */
                         PM8001_IO_DBG(pm8001_ha, pm8001_printk("FPDMA\n"));
                 }
diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index b06443a0db2d..05cce463ab01 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -4077,7 +4077,7 @@ static int pm80xx_chip_sata_req(struct pm8001_hba_info *pm8001_ha,
                         PM8001_IO_DBG(pm8001_ha, pm8001_printk("PIO\n"));
                 }
                 if (task->ata_task.use_ncq &&
-                        dev->sata_dev.command_set != ATAPI_COMMAND_SET) {
+                    dev->sata_dev.class != ATA_DEV_ATAPI) {
                         ATAP = 0x07; /* FPDMA */
                         PM8001_IO_DBG(pm8001_ha, pm8001_printk("FPDMA\n"));
                 }
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index ef7872c20da9..8528a09a00c4 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -161,17 +161,12 @@ struct expander_device {
 };
 
 /* ---------- SATA device ---------- */
-enum ata_command_set {
-        ATA_COMMAND_SET   = 0,
-        ATAPI_COMMAND_SET = 1,
-};
-
 #define ATA_RESP_FIS_SIZE 24
 
 struct sata_device {
-        enum   ata_command_set command_set;
-        struct smp_resp        rps_resp; /* report_phy_sata_resp */
-        u8     port_no;        /* port number, if this is a PM (Port) */
+        unsigned int class;
+        struct smp_resp        rps_resp; /* report_phy_sata_resp */
+        u8     port_no;        /* port number, if this is a PM (Port) */
 
         struct ata_port *ap;
         struct ata_host ata_host;