libata: Implement ATA_DEV_ZAC

Add new ATA device type for ZAC devices.

Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c5ba15a..5c84fb5 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1043,8 +1043,8 @@ const char *sata_spd_string(unsigned int spd)
  *     None.
  *
  *     RETURNS:
- *     Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
- *     %ATA_DEV_UNKNOWN the event of failure.
+ *     Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
+ *     %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
  */
 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
 {
@@ -1089,6 +1089,11 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
                return ATA_DEV_SEMB;
        }
 
+       if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) {
+               DPRINTK("found ZAC device by sig\n");
+               return ATA_DEV_ZAC;
+       }
+
        DPRINTK("unknown device\n");
        return ATA_DEV_UNKNOWN;
 }
@@ -1329,7 +1334,7 @@ static int ata_hpa_resize(struct ata_device *dev)
        int rc;
 
        /* do we need to do it? */
-       if (dev->class != ATA_DEV_ATA ||
+       if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
            !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
            (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
                return 0;
@@ -1889,6 +1894,7 @@ retry:
        case ATA_DEV_SEMB:
                class = ATA_DEV_ATA;    /* some hard drives report SEMB sig */
        case ATA_DEV_ATA:
+       case ATA_DEV_ZAC:
                tf.command = ATA_CMD_ID_ATA;
                break;
        case ATA_DEV_ATAPI:
@@ -1980,7 +1986,7 @@ retry:
        rc = -EINVAL;
        reason = "device reports invalid type";
 
-       if (class == ATA_DEV_ATA) {
+       if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
                if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
                        goto err_out;
                if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
@@ -2015,7 +2021,8 @@ retry:
                        goto retry;
        }
 
-       if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
+       if ((flags & ATA_READID_POSTRESET) &&
+           (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
                /*
                 * The exact sequence expected by certain pre-ATA4 drives is:
                 * SRST RESET
@@ -2280,7 +2287,7 @@ int ata_dev_configure(struct ata_device *dev)
                        sizeof(modelbuf));
 
        /* ATA-specific feature tests */
-       if (dev->class == ATA_DEV_ATA) {
+       if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
                if (ata_id_is_cfa(id)) {
                        /* CPRM may make this media unusable */
                        if (id[ATA_ID_CFA_KEY_MGMT] & 1)
@@ -4033,6 +4040,7 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
        if (ata_class_enabled(new_class) &&
            new_class != ATA_DEV_ATA &&
            new_class != ATA_DEV_ATAPI &&
+           new_class != ATA_DEV_ZAC &&
            new_class != ATA_DEV_SEMB) {
                ata_dev_info(dev, "class mismatch %u != %u\n",
                             dev->class, new_class);

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index dad83df..3dbec89 100644 (file)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1809,6 +1809,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
 
        switch (qc->dev->class) {
        case ATA_DEV_ATA:
+       case ATA_DEV_ZAC:
                if (err & ATA_ICRC)
                        qc->err_mask |= AC_ERR_ATA_BUS;
                if (err & (ATA_UNC | ATA_AMNF))
@@ -3792,7 +3793,8 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
                                struct ata_eh_context *ehc = &link->eh_context;
                                unsigned long tmp;
 
-                               if (dev->class != ATA_DEV_ATA)
+                               if (dev->class != ATA_DEV_ATA &&
+                                   dev->class != ATA_DEV_ZAC)
                                        continue;
                                if (!(ehc->i.dev_action[dev->devno] &
                                      ATA_EH_PARK))
@@ -3873,7 +3875,8 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 
                /* retry flush if necessary */
                ata_for_each_dev(dev, link, ALL) {
-                       if (dev->class != ATA_DEV_ATA)
+                       if (dev->class != ATA_DEV_ATA &&
+                           dev->class != ATA_DEV_ZAC)
                                continue;
                        rc = ata_eh_maybe_retry_flush(dev);
                        if (rc)

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 0586f66..bea6e7f 100644 (file)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -235,7 +235,8 @@ static ssize_t ata_scsi_park_store(struct device *device,
                rc = -ENODEV;
                goto unlock;
        }
-       if (dev->class != ATA_DEV_ATA) {
+       if (dev->class != ATA_DEV_ATA &&
+           dev->class != ATA_DEV_ZAC) {
                rc = -EOPNOTSUPP;
                goto unlock;
        }
@@ -3412,7 +3413,7 @@ static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
        ata_xlat_func_t xlat_func;
        int rc = 0;
 
-       if (dev->class == ATA_DEV_ATA) {
+       if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
                if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
                        goto bad_cdb_len;
 

diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
index e374132..3227b7c 100644 (file)
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -143,6 +143,7 @@ static struct {
        { ATA_DEV_PMP_UNSUP,            "pmp" },
        { ATA_DEV_SEMB,                 "semb" },
        { ATA_DEV_SEMB_UNSUP,           "semb" },
+       { ATA_DEV_ZAC,                  "zac" },
        { ATA_DEV_NONE,                 "none" }
 };
 ata_bitfield_name_search(class, ata_class_names)

diff --git a/include/linux/libata.h b/include/linux/libata.h
index bd5fefe..a26daea 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -191,7 +191,8 @@ enum {
        ATA_DEV_PMP_UNSUP       = 6,    /* SATA port multiplier (unsupported) */
        ATA_DEV_SEMB            = 7,    /* SEMB */
        ATA_DEV_SEMB_UNSUP      = 8,    /* SEMB (unsupported) */
-       ATA_DEV_NONE            = 9,    /* no device */
+       ATA_DEV_ZAC             = 9,    /* ZAC device */
+       ATA_DEV_NONE            = 10,   /* no device */
 
        /* struct ata_link flags */
        ATA_LFLAG_NO_HRST       = (1 << 1), /* avoid hardreset */
@@ -1491,7 +1492,8 @@ static inline unsigned int ata_tag_internal(unsigned int tag)
 static inline unsigned int ata_class_enabled(unsigned int class)
 {
        return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
-               class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
+               class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
+               class == ATA_DEV_ZAC;
 }
 
 static inline unsigned int ata_class_disabled(unsigned int class)