[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>

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 40989eea8f97b230f265e3a410082f1777690c5d..eed5f03206d1fcac1c5446805f173983d24fbbf7 100644 (file)
--- 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 bfc8c4ea66f8fe53315f91fbb36fa3eb77b320d1..3f96b66e5761677e74c031d1fac224b3b4166571 100644 (file)
--- 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;