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[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>
This commit is contained in:
Yang, Bo 2009-10-06 14:40:58 -06:00 committed by James Bottomley
parent 044833b572
commit 7bebf5c79c
2 changed files with 22 additions and 3 deletions
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24
drivers/scsi/megaraid/megaraid_sas.c
View File

@ -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;

1
drivers/scsi/megaraid/megaraid_sas.h
View File

@ -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