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[SCSI] hpsa: use extended report luns command for HP SSD SmartPath

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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>
This commit is contained in:
Matt Gates 2014-02-18 13:55:07 -06:00 committed by James Bottomley
parent 2b01d816f5
commit a93aa1fe00
2 changed files with 9 additions and 5 deletions
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13
drivers/scsi/hpsa.c
View file

@ -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;

1
drivers/scsi/hpsa_cmd.h
View file

@ -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;