[SCSI] hpsa: Add hba mode to the hpsa driver
This allows exposing physical disks behind Smart
Array controllers to the OS (if the controller
has the right firmware and is in "hba" mode)
Signed-off-by: Joe Handzik <joseph.t.handzik@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 388e229..eb23eea 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -2128,6 +2128,37 @@
return rc;
}
+static int hpsa_bmic_ctrl_mode_sense(struct ctlr_info *h,
+ unsigned char *scsi3addr, unsigned char page,
+ struct bmic_controller_parameters *buf, size_t bufsize)
+{
+ int rc = IO_OK;
+ struct CommandList *c;
+ struct ErrorInfo *ei;
+
+ c = cmd_special_alloc(h);
+
+ if (c == NULL) { /* trouble... */
+ dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
+ return -ENOMEM;
+ }
+
+ if (fill_cmd(c, BMIC_SENSE_CONTROLLER_PARAMETERS, h, buf, bufsize,
+ page, scsi3addr, TYPE_CMD)) {
+ rc = -1;
+ goto out;
+ }
+ hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE);
+ ei = c->err_info;
+ if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
+ hpsa_scsi_interpret_error(h, c);
+ rc = -1;
+ }
+out:
+ cmd_special_free(h, c);
+ return rc;
+ }
+
static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
u8 reset_type)
{
@@ -2929,6 +2960,24 @@
return NULL;
}
+static int hpsa_hba_mode_enabled(struct ctlr_info *h)
+{
+ int rc;
+ struct bmic_controller_parameters *ctlr_params;
+ ctlr_params = kzalloc(sizeof(struct bmic_controller_parameters),
+ GFP_KERNEL);
+
+ if (!ctlr_params)
+ return 0;
+ rc = hpsa_bmic_ctrl_mode_sense(h, RAID_CTLR_LUNID, 0, ctlr_params,
+ sizeof(struct bmic_controller_parameters));
+ if (rc != 0) {
+ kfree(ctlr_params);
+ return 0;
+ }
+ return ctlr_params->nvram_flags & (1 << 3) ? 1 : 0;
+}
+
static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno)
{
/* the idea here is we could get notified
@@ -2952,6 +3001,7 @@
int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 24;
int i, n_ext_target_devs, ndevs_to_allocate;
int raid_ctlr_position;
+ u8 rescan_hba_mode;
DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
@@ -2965,6 +3015,15 @@
}
memset(lunzerobits, 0, sizeof(lunzerobits));
+ rescan_hba_mode = hpsa_hba_mode_enabled(h);
+
+ if (!h->hba_mode_enabled && rescan_hba_mode)
+ dev_warn(&h->pdev->dev, "HBA mode enabled\n");
+ else if (h->hba_mode_enabled && !rescan_hba_mode)
+ dev_warn(&h->pdev->dev, "HBA mode disabled\n");
+
+ h->hba_mode_enabled = rescan_hba_mode;
+
if (hpsa_gather_lun_info(h, reportlunsize,
(struct ReportLUNdata *) physdev_list, &nphysicals,
&physical_mode, logdev_list, &nlogicals))
@@ -3048,7 +3107,19 @@
ncurrent++;
break;
case TYPE_DISK:
- if (i >= nphysicals) {
+ if (h->hba_mode_enabled) {
+ /* never use raid mapper in HBA mode */
+ this_device->offload_enabled = 0;
+ ncurrent++;
+ break;
+ } else if (h->acciopath_status) {
+ if (i >= nphysicals) {
+ ncurrent++;
+ break;
+ }
+ } else {
+ if (i < nphysicals)
+ break;
ncurrent++;
break;
}
@@ -4116,7 +4187,10 @@
sh->max_lun = HPSA_MAX_LUN;
sh->max_id = HPSA_MAX_LUN;
sh->can_queue = h->nr_cmds;
- sh->cmd_per_lun = h->nr_cmds;
+ if (h->hba_mode_enabled)
+ sh->cmd_per_lun = 7;
+ else
+ sh->cmd_per_lun = h->nr_cmds;
sh->sg_tablesize = h->maxsgentries;
h->scsi_host = sh;
sh->hostdata[0] = (unsigned long) h;
@@ -5261,6 +5335,16 @@
c->Request.CDB[8] = (size >> 8) & 0xFF;
c->Request.CDB[9] = size & 0xFF;
break;
+ case BMIC_SENSE_CONTROLLER_PARAMETERS:
+ c->Request.CDBLen = 10;
+ c->Request.Type.Attribute = ATTR_SIMPLE;
+ c->Request.Type.Direction = XFER_READ;
+ c->Request.Timeout = 0;
+ c->Request.CDB[0] = BMIC_READ;
+ c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
+ c->Request.CDB[7] = (size >> 16) & 0xFF;
+ c->Request.CDB[8] = (size >> 8) & 0xFF;
+ break;
default:
dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
BUG();
@@ -6885,6 +6969,7 @@
pci_set_drvdata(pdev, h);
h->ndevices = 0;
+ h->hba_mode_enabled = 0;
h->scsi_host = NULL;
spin_lock_init(&h->devlock);
hpsa_put_ctlr_into_performant_mode(h);
@@ -6944,8 +7029,8 @@
goto reinit_after_soft_reset;
}
- /* Enable Accelerated IO path at driver layer */
- h->acciopath_status = 1;
+ /* Enable Accelerated IO path at driver layer */
+ h->acciopath_status = 1;
h->drv_req_rescan = 0;