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Old 09-23-2010, 01:09 AM
Brad Figg
 
Default 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>
Signed-off-by: Brad Figg <brad.figg@canonical.com>
---
drivers/scsi/megaraid/megaraid_sas.c | 24 +++++++++++++++++++++---
drivers/scsi/megaraid/megaraid_sas.h | 1 +
2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index be67f2e..5f8ea6d 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -1169,7 +1169,14 @@ 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);
@@ -2594,7 +2601,13 @@ 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;
@@ -2727,7 +2740,6 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
spin_lock_init(&instance->completion_lock);

mutex_init(&instance->aen_mutex);
- sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);

/*
* Initialize PCI related and misc parameters
@@ -2737,6 +2749,12 @@ 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->last_time = 0;
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index f2699cd..a6fd2b7 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -572,6 +572,7 @@ 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
--
1.7.0.4


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