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authorMatt Gates <matthew.gates@hp.com>2014-02-18 23:55:07 +0400
committerJames Bottomley <JBottomley@Parallels.com>2014-03-15 21:19:01 +0400
commita93aa1fe00a461690f0d0a9ed236b646056d1223 (patch)
tree52027d37a847cc0e6bef151bd0b839cf0542d71a /drivers
parent2b01d816f5f884d5ea16ab2498736b1221bc027c (diff)
downloadlinux-a93aa1fe00a461690f0d0a9ed236b646056d1223.tar.xz
[SCSI] hpsa: use extended report luns command for HP SSD SmartPath
There is an extended report luns command which contains additional information about physical devices. In particular we need to get the physical device handle so we can use an alternate i/o path for fast physical devices like SSDs so we can speed up certain i/o's by bypassing the RAID stack code in the controller firmware. Signed-off-by: Matt Gates <matthew.gates@hp.com> Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/hpsa.c13
-rw-r--r--drivers/scsi/hpsa_cmd.h1
2 files changed, 9 insertions, 5 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 40989eea8f97..eed5f03206d1 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -1888,11 +1888,12 @@ static int hpsa_gather_lun_info(struct ctlr_info *h,
struct ReportLUNdata *physdev, u32 *nphysicals,
struct ReportLUNdata *logdev, u32 *nlogicals)
{
- if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) {
+ if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize,
+ HPSA_REPORT_PHYS_EXTENDED)) {
dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
return -1;
}
- *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8;
+ *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
if (*nphysicals > HPSA_MAX_PHYS_LUN) {
dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded."
" %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
@@ -1923,7 +1924,8 @@ static int hpsa_gather_lun_info(struct ctlr_info *h,
}
u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i,
- int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list,
+ int nphysicals, int nlogicals,
+ struct ReportExtendedLUNdata *physdev_list,
struct ReportLUNdata *logdev_list)
{
/* Helper function, figure out where the LUN ID info is coming from
@@ -1959,7 +1961,7 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
* tell which devices we already know about, vs. new
* devices, vs. disappearing devices.
*/
- struct ReportLUNdata *physdev_list = NULL;
+ struct ReportExtendedLUNdata *physdev_list = NULL;
struct ReportLUNdata *logdev_list = NULL;
u32 nphysicals = 0;
u32 nlogicals = 0;
@@ -1982,7 +1984,8 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
}
memset(lunzerobits, 0, sizeof(lunzerobits));
- if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals,
+ if (hpsa_gather_lun_info(h, reportlunsize,
+ (struct ReportLUNdata *) physdev_list, &nphysicals,
logdev_list, &nlogicals))
goto out;
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index bfc8c4ea66f8..3f96b66e5761 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -162,6 +162,7 @@ struct InquiryData {
#define HPSA_REPORT_LOG 0xc2 /* Report Logical LUNs */
#define HPSA_REPORT_PHYS 0xc3 /* Report Physical LUNs */
+#define HPSA_REPORT_PHYS_EXTENDED 0x02
struct ReportLUNdata {
u8 LUNListLength[4];
u32 reserved;