summaryrefslogtreecommitdiff
path: root/drivers/ata/libata-core.c
diff options
context:
space:
mode:
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/ata/libata-core.c
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/ata/libata-core.c')
-rw-r--r--drivers/ata/libata-core.c94
1 files changed, 94 insertions, 0 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;
}