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authorHannes Reinecke <hare@suse.de>2016-04-25 13:45:56 +0300
committerTejun Heo <tj@kernel.org>2016-05-09 19:36:46 +0300
commit6d1003ae8db228b74ef61536364cd2a1bd973dd8 (patch)
treeac38f95df02f9ee1ebce2d0ade2e2928267fd2e3 /drivers
parent856c4663930988118d9f355aad66811dd6df06de (diff)
downloadlinux-6d1003ae8db228b74ef61536364cd2a1bd973dd8.tar.xz
libata: support host-aware and host-managed ZAC devices
Byte 69 bits 0:1 in the IDENTIFY DEVICE data indicate a host-aware ZAC device. Host-managed ZAC devices have their own individual signature, and to not set the bits in the IDENTIFY DEVICE data. And whenever we detect a ZAC-compatible device we should be displaying the zoned block characteristics VPD page. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/libata-core.c94
-rw-r--r--drivers/ata/libata-scsi.c38
2 files changed, 130 insertions, 2 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1528c7cc0089..97f31707b570 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2227,6 +2227,99 @@ static void ata_dev_config_sense_reporting(struct ata_device *dev)
}
}
+static void ata_dev_config_zac(struct ata_device *dev)
+{
+ struct ata_port *ap = dev->link->ap;
+ unsigned int err_mask;
+ u8 *identify_buf = ap->sector_buf;
+ int log_index = ATA_LOG_SATA_ID_DEV_DATA * 2, i, found = 0;
+ u16 log_pages;
+
+ dev->zac_zones_optimal_open = U32_MAX;
+ dev->zac_zones_optimal_nonseq = U32_MAX;
+ dev->zac_zones_max_open = U32_MAX;
+
+ /*
+ * Always set the 'ZAC' flag for Host-managed devices.
+ */
+ if (dev->class == ATA_DEV_ZAC)
+ dev->flags |= ATA_DFLAG_ZAC;
+ else if (ata_id_zoned_cap(dev->id) == 0x01)
+ /*
+ * Check for host-aware devices.
+ */
+ dev->flags |= ATA_DFLAG_ZAC;
+
+ if (!(dev->flags & ATA_DFLAG_ZAC))
+ return;
+
+ /*
+ * Read Log Directory to figure out if IDENTIFY DEVICE log
+ * is supported.
+ */
+ err_mask = ata_read_log_page(dev, ATA_LOG_DIRECTORY,
+ 0, ap->sector_buf, 1);
+ if (err_mask) {
+ ata_dev_info(dev,
+ "failed to get Log Directory Emask 0x%x\n",
+ err_mask);
+ return;
+ }
+ log_pages = get_unaligned_le16(&ap->sector_buf[log_index]);
+ if (log_pages == 0) {
+ ata_dev_warn(dev,
+ "ATA Identify Device Log not supported\n");
+ return;
+ }
+ /*
+ * Read IDENTIFY DEVICE data log, page 0, to figure out
+ * if page 9 is supported.
+ */
+ err_mask = ata_read_log_page(dev, ATA_LOG_SATA_ID_DEV_DATA, 0,
+ identify_buf, 1);
+ if (err_mask) {
+ ata_dev_info(dev,
+ "failed to get Device Identify Log Emask 0x%x\n",
+ err_mask);
+ return;
+ }
+ log_pages = identify_buf[8];
+ for (i = 0; i < log_pages; i++) {
+ if (identify_buf[9 + i] == ATA_LOG_ZONED_INFORMATION) {
+ found++;
+ break;
+ }
+ }
+ if (!found) {
+ ata_dev_warn(dev,
+ "ATA Zoned Information Log not supported\n");
+ return;
+ }
+
+ /*
+ * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
+ */
+ err_mask = ata_read_log_page(dev, ATA_LOG_SATA_ID_DEV_DATA,
+ ATA_LOG_ZONED_INFORMATION,
+ identify_buf, 1);
+ if (!err_mask) {
+ u64 zoned_cap, opt_open, opt_nonseq, max_open;
+
+ zoned_cap = get_unaligned_le64(&identify_buf[8]);
+ if ((zoned_cap >> 63))
+ dev->zac_zoned_cap = (zoned_cap & 1);
+ opt_open = get_unaligned_le64(&identify_buf[24]);
+ if ((opt_open >> 63))
+ dev->zac_zones_optimal_open = (u32)opt_open;
+ opt_nonseq = get_unaligned_le64(&identify_buf[32]);
+ if ((opt_nonseq >> 63))
+ dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
+ max_open = get_unaligned_le64(&identify_buf[40]);
+ if ((max_open >> 63))
+ dev->zac_zones_max_open = (u32)max_open;
+ }
+}
+
/**
* ata_dev_configure - Configure the specified ATA/ATAPI device
* @dev: Target device to configure
@@ -2450,6 +2543,7 @@ int ata_dev_configure(struct ata_device *dev)
}
}
ata_dev_config_sense_reporting(dev);
+ ata_dev_config_zac(dev);
dev->cdb_len = 16;
}
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 96abd42c9985..b86af1416dce 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2144,6 +2144,7 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
*/
static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
{
+ int num_pages;
const u8 pages[] = {
0x00, /* page 0x00, this page */
0x80, /* page 0x80, unit serial no page */
@@ -2152,10 +2153,14 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
0xb0, /* page 0xb0, block limits page */
0xb1, /* page 0xb1, block device characteristics page */
0xb2, /* page 0xb2, thin provisioning page */
+ 0xb6, /* page 0xb6, zoned block device characteristics */
};
- rbuf[3] = sizeof(pages); /* number of supported VPD pages */
- memcpy(rbuf + 4, pages, sizeof(pages));
+ num_pages = sizeof(pages);
+ if (!(args->dev->flags & ATA_DFLAG_ZAC))
+ num_pages--;
+ rbuf[3] = num_pages; /* number of supported VPD pages */
+ memcpy(rbuf + 4, pages, num_pages);
return 0;
}
@@ -2343,6 +2348,26 @@ static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
return 0;
}
+static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
+{
+ /*
+ * zbc-r05 SCSI Zoned Block device characteristics VPD page
+ */
+ rbuf[1] = 0xb6;
+ rbuf[3] = 0x3C;
+
+ /*
+ * URSWRZ bit is only meaningful for host-managed ZAC drives
+ */
+ if (args->dev->zac_zoned_cap & 1)
+ rbuf[4] |= 1;
+ put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
+ put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
+ put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
+
+ return 0;
+}
+
/**
* ata_scsiop_noop - Command handler that simply returns success.
* @args: device IDENTIFY data / SCSI command of interest.
@@ -2661,6 +2686,9 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
rbuf[14] |= 0x40; /* LBPRZ */
}
}
+ if (ata_id_zoned_cap(args->id) ||
+ args->dev->class == ATA_DEV_ZAC)
+ rbuf[12] = (1 << 4); /* RC_BASIS */
}
return 0;
}
@@ -4046,6 +4074,12 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
case 0xb2:
ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
break;
+ case 0xb6:
+ if (dev->flags & ATA_DFLAG_ZAC) {
+ ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
+ break;
+ }
+ /* Fallthrough */
default:
ata_scsi_invalid_field(dev, cmd, 2);
break;