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Date: Sun, 20 Sep 2009 20:42:30 -0600
From: "Yang, Bo" <Bo.Yang@....com>
To: "Yang, Bo" <Bo.Yang@....com>,
"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
"akpm@...l.org" <akpm@...l.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"James.Bottomley@...senPartnership.com"
<James.Bottomley@...senPartnership.com>,
"James.Bottomley@...e.de" <James.Bottomley@...e.de>
Subject: [PATCH 7/12] 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@....com>
---
drivers/scsi/megaraid/megaraid_sas.c | 24 +++++++++++++++++++++---
drivers/scsi/megaraid/megaraid_sas.h | 1 +
2 files changed, 22 insertions(+), 3 deletions(-)
diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c 2009-09-14 05:59:48.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c 2009-09-14 06:07:09.000000000 -0400
@@ -1239,7 +1239,14 @@ static void megasas_complete_cmd_dpc(uns
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 mega
*/
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,
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,
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 -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h 2009-09-14 05:59:48.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h 2009-09-14 06:09:56.000000000 -0400
@@ -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
--
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