[SCSI] megaraid_sas: allocate the application cmds to sas2 controller

MegaRAID SAS2 controller ioctl can't use 32 cmd for applications.
Driver need to divide different number of cmds to IO and application.

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

2 files changed, 22 insertions, 3 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 9967ee72a967..5afd65121725 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -1239,7 +1239,14 @@ static void megasas_complete_cmd_dpc(unsigned long instance_addr)
 
                 spin_lock_irqsave(instance->host->host_lock, flags);
                 instance->flag &= ~MEGASAS_FW_BUSY;
-                instance->host->can_queue =
+                if ((instance->pdev->device ==
+                        PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                        (instance->pdev->device ==
+                        PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                        instance->host->can_queue =
+                                instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
+                } else
+                        instance->host->can_queue =
                                 instance->max_fw_cmds - MEGASAS_INT_CMDS;
 
                 spin_unlock_irqrestore(instance->host->host_lock, flags);
@@ -2774,7 +2781,13 @@ static int megasas_io_attach(struct megasas_instance *instance)
          */
         host->irq = instance->pdev->irq;
         host->unique_id = instance->unique_id;
-        host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
+        if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                host->can_queue =
+                        instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
+        } else
+                host->can_queue =
+                        instance->max_fw_cmds - MEGASAS_INT_CMDS;
         host->this_id = instance->init_id;
         host->sg_tablesize = instance->max_num_sge;
         host->max_sectors = instance->max_sectors_per_req;
@@ -2909,7 +2922,6 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
         spin_lock_init(&poll_aen_lock);
 
         mutex_init(&instance->aen_mutex);
-        sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
 
         /*
          * Initialize PCI related and misc parameters
@@ -2919,6 +2931,12 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
         instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
         instance->init_id = MEGASAS_DEFAULT_INIT_ID;
 
+        if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
+        } else
+                sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
+
         megasas_dbg_lvl = 0;
         instance->flag = 0;
         instance->unload = 0;
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 8ac6b2659c12..4c78cd32e757 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -655,6 +655,7 @@ struct megasas_ctrl_info {
  * is shown below
  */
 #define MEGASAS_INT_CMDS                        32
+#define MEGASAS_SKINNY_INT_CMDS                 5
 
 /*
  * FW can accept both 32 and 64 bit SGLs. We want to allocate 32/64 bit