[SCSI] megaraid_sas: report system PDs to OS

When OS issue inquiry, it will check driver's internal pd_list.

Signed-off-by Bo Yang<bo.yang@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 65 insertions, 26 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 48c3658d73a7..9967ee72a967 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -1115,24 +1115,76 @@ megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
         return 0;
 }
 
+static struct megasas_instance *megasas_lookup_instance(u16 host_no)
+{
+        int i;
+
+        for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+
+                if ((megasas_mgmt_info.instance[i]) &&
+                    (megasas_mgmt_info.instance[i]->host->host_no == host_no))
+                        return megasas_mgmt_info.instance[i];
+        }
+
+        return NULL;
+}
+
 static int megasas_slave_configure(struct scsi_device *sdev)
 {
+        u16             pd_index = 0;
+        struct  megasas_instance *instance ;
+
+        instance = megasas_lookup_instance(sdev->host->host_no);
+
         /*
-         * Don't export physical disk devices to the disk driver.
-         *
-         * FIXME: Currently we don't export them to the midlayer at all.
-         *        That will be fixed once LSI engineers have audited the
-         *        firmware for possible issues.
-         */
-        if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
+        * Don't export physical disk devices to the disk driver.
+        *
+        * FIXME: Currently we don't export them to the midlayer at all.
+        *        That will be fixed once LSI engineers have audited the
+        *        firmware for possible issues.
+        */
+        if (sdev->channel < MEGASAS_MAX_PD_CHANNELS &&
+                                sdev->type == TYPE_DISK) {
+                pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
+                                                                sdev->id;
+                if (instance->pd_list[pd_index].driveState ==
+                                                MR_PD_STATE_SYSTEM) {
+                        blk_queue_rq_timeout(sdev->request_queue,
+                                MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
+                        return 0;
+                }
                 return -ENXIO;
+        }
 
         /*
-         * The RAID firmware may require extended timeouts.
-         */
-        if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
-                blk_queue_rq_timeout(sdev->request_queue,
-                                     MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
+        * The RAID firmware may require extended timeouts.
+        */
+        blk_queue_rq_timeout(sdev->request_queue,
+                MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
+        return 0;
+}
+
+static int megasas_slave_alloc(struct scsi_device *sdev)
+{
+        u16             pd_index = 0;
+        struct megasas_instance *instance ;
+        instance = megasas_lookup_instance(sdev->host->host_no);
+        if ((sdev->channel < MEGASAS_MAX_PD_CHANNELS) &&
+                                (sdev->type == TYPE_DISK)) {
+                /*
+                 * Open the OS scan to the SYSTEM PD
+                 */
+                pd_index =
+                        (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
+                        sdev->id;
+                if ((instance->pd_list[pd_index].driveState ==
+                                        MR_PD_STATE_SYSTEM) &&
+                        (instance->pd_list[pd_index].driveType ==
+                                                TYPE_DISK)) {
+                        return 0;
+                }
+                return -ENXIO;
+        }
         return 0;
 }
 
@@ -1423,6 +1475,7 @@ static struct scsi_host_template megasas_template = {
         .name = "LSI SAS based MegaRAID driver",
         .proc_name = "megaraid_sas",
         .slave_configure = megasas_slave_configure,
+        .slave_alloc = megasas_slave_alloc,
         .queuecommand = megasas_queue_command,
         .eh_device_reset_handler = megasas_reset_device,
         .eh_bus_reset_handler = megasas_reset_bus_host,
@@ -3455,20 +3508,6 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
         return error;
 }
 
-static struct megasas_instance *megasas_lookup_instance(u16 host_no)
-{
-        int i;
-
-        for (i = 0; i < megasas_mgmt_info.max_index; i++) {
-
-                if ((megasas_mgmt_info.instance[i]) &&
-                    (megasas_mgmt_info.instance[i]->host->host_no == host_no))
-                        return megasas_mgmt_info.instance[i];
-        }
-
-        return NULL;
-}
-
 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
 {
         struct megasas_iocpacket __user *user_ioc =