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authorPrakash, Sathya <sathya.prakash@lsi.com>2008-03-07 15:53:21 +0530
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-04-07 12:15:43 -0500
commit23a274c8a5adafc74a66f16988776fc7dd6f6e51 (patch)
tree9cae17ade000db17efeee4587bc6ab65632302ea /drivers
parent74b2e047ecda7a82c3327a0d0bb45ee2ccf301ca (diff)
[SCSI] mpt fusion: Enable MSI by default for SAS controllers
This patch modifies the driver to enable MSI by default for all SAS chips. Signed-off-by: Sathya Prakash <sathya.prakash@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/message/fusion/mptbase.c17
-rw-r--r--drivers/message/fusion/mptbase.h1
2 files changed, 13 insertions, 5 deletions
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index c6be6eba7dc..6ee5876d052 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -79,7 +79,7 @@ MODULE_VERSION(my_VERSION);
/*
* cmd line parameters
*/
-static int mpt_msi_enable;
+static int mpt_msi_enable = -1;
module_param(mpt_msi_enable, int, 0);
MODULE_PARM_DESC(mpt_msi_enable, " MSI Support Enable (default=0)");
@@ -1686,6 +1686,11 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
ioc->bus_type = SAS;
}
+ if (ioc->bus_type == SAS && mpt_msi_enable == -1)
+ ioc->msi_enable = 1;
+ else
+ ioc->msi_enable = mpt_msi_enable;
+
if (ioc->errata_flag_1064)
pci_disable_io_access(pdev);
@@ -2057,15 +2062,17 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
if ((ret == 0) && (reason == MPT_HOSTEVENT_IOC_BRINGUP)) {
ioc->pci_irq = -1;
if (ioc->pcidev->irq) {
- if (mpt_msi_enable && !pci_enable_msi(ioc->pcidev))
+ if (ioc->msi_enable && !pci_enable_msi(ioc->pcidev))
printk(MYIOC_s_INFO_FMT "PCI-MSI enabled\n",
ioc->name);
+ else
+ ioc->msi_enable = 0;
rc = request_irq(ioc->pcidev->irq, mpt_interrupt,
IRQF_SHARED, ioc->name, ioc);
if (rc < 0) {
printk(MYIOC_s_ERR_FMT "Unable to allocate "
"interrupt %d!\n", ioc->name, ioc->pcidev->irq);
- if (mpt_msi_enable)
+ if (ioc->msi_enable)
pci_disable_msi(ioc->pcidev);
return -EBUSY;
}
@@ -2261,7 +2268,7 @@ mpt_do_ioc_recovery(MPT_ADAPTER *ioc, u32 reason, int sleepFlag)
out:
if ((ret != 0) && irq_allocated) {
free_irq(ioc->pci_irq, ioc);
- if (mpt_msi_enable)
+ if (ioc->msi_enable)
pci_disable_msi(ioc->pcidev);
}
return ret;
@@ -2443,7 +2450,7 @@ mpt_adapter_dispose(MPT_ADAPTER *ioc)
if (ioc->pci_irq != -1) {
free_irq(ioc->pci_irq, ioc);
- if (mpt_msi_enable)
+ if (ioc->msi_enable)
pci_disable_msi(ioc->pcidev);
ioc->pci_irq = -1;
}
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index caadc68c300..50c0c173e24 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -630,6 +630,7 @@ typedef struct _MPT_ADAPTER
int mtrr_reg;
struct pci_dev *pcidev; /* struct pci_dev pointer */
int bars; /* bitmask of BAR's that must be configured */
+ int msi_enable;
u8 __iomem *memmap; /* mmap address */
struct Scsi_Host *sh; /* Scsi Host pointer */
SpiCfgData spi_data; /* Scsi config. data */