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authorTony Vroon <tony@linx.net>2009-08-05 19:50:09 -0400
committerJeff Garzik <jgarzik@redhat.com>2009-08-12 06:20:29 -0400
commit51c8949950647afeeb897e08dd75ad99078adb50 (patch)
tree27bbee11934421d508b721fd9fd5a43ce32bd0e0 /drivers/ata
parent7831387bda72af3059be48d39846d3eb6d8ce2f6 (diff)
sata_nv: MSI support, disabled by default
At least the nVidia MCP55 controller quite happily supports MSI. This adds an option to use it. It is disabled by default. As per feedback by Robert Hancock, it will honour the user request as the kernel will not enable MSI where the controller or the specific system configuration do not support it. Signed-off-by: Tony Vroon <tony@linx.net> Cc: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/sata_nv.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index b2d11f300c39..86a40582999c 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -602,6 +602,7 @@ MODULE_VERSION(DRV_VERSION);
602 602
603static int adma_enabled; 603static int adma_enabled;
604static int swncq_enabled = 1; 604static int swncq_enabled = 1;
605static int msi_enabled;
605 606
606static void nv_adma_register_mode(struct ata_port *ap) 607static void nv_adma_register_mode(struct ata_port *ap)
607{ 608{
@@ -2459,6 +2460,11 @@ static int nv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2459 } else if (type == SWNCQ) 2460 } else if (type == SWNCQ)
2460 nv_swncq_host_init(host); 2461 nv_swncq_host_init(host);
2461 2462
2463 if (msi_enabled) {
2464 dev_printk(KERN_NOTICE, &pdev->dev, "Using MSI\n");
2465 pci_enable_msi(pdev);
2466 }
2467
2462 pci_set_master(pdev); 2468 pci_set_master(pdev);
2463 return ata_host_activate(host, pdev->irq, ipriv->irq_handler, 2469 return ata_host_activate(host, pdev->irq, ipriv->irq_handler,
2464 IRQF_SHARED, ipriv->sht); 2470 IRQF_SHARED, ipriv->sht);
@@ -2558,4 +2564,6 @@ module_param_named(adma, adma_enabled, bool, 0444);
2558MODULE_PARM_DESC(adma, "Enable use of ADMA (Default: false)"); 2564MODULE_PARM_DESC(adma, "Enable use of ADMA (Default: false)");
2559module_param_named(swncq, swncq_enabled, bool, 0444); 2565module_param_named(swncq, swncq_enabled, bool, 0444);
2560MODULE_PARM_DESC(swncq, "Enable use of SWNCQ (Default: true)"); 2566MODULE_PARM_DESC(swncq, "Enable use of SWNCQ (Default: true)");
2567module_param_named(msi, msi_enabled, bool, 0444);
2568MODULE_PARM_DESC(msi, "Enable use of MSI (Default: false)");
2561 2569