From fb86a35b9ded8a7e53a432cbf28df603cdd4849c Mon Sep 17 00:00:00 2001 From: Mike Miller Date: Sun, 8 Jan 2006 01:03:50 -0800 Subject: [PATCH] cciss: adds MSI and MSI-X support This creates a new function, cciss_interrupt_mode called from cciss_pci_init. This function determines what type of interrupt vector to use, i.e., MSI, MSI-X, or IO-APIC. One noticeable difference is changing the interrupt field of the controller struct to an array of 4 unsigned ints. The Smart Array HW is capable of generating 4 distinct interrupts depending on the transport method in use during operation. These are: #define DOORBELL_INT 0 Used to notify the contoller of configuration updates. We only use this feature when in polling mode. #define PERF_MODE_INT 0 Used when the controller is in Performant Mode. #define SIMPLE_MODE_INT 2 Used when the controller is in Simple Mode (current Linux implementation). #define MEMQ_INT_MODE 3 Not used. When using IO-APIC interrupts these 4 lines are OR'ed together so when any one fires an interrupt an is generated. In MSI or MSI-X mode this hardware OR'ing is ignored. We must register for our interrupt depending on what mode the controller is running. For Linux we use SIMPLE_MODE_INT exclusively at this time. Please consider this for inclusion. Signed-off-by: Mike Miller Cc: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/cciss_scsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/block/cciss_scsi.c') diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c index 2942d32280a5..9e35de05d5c5 100644 --- a/drivers/block/cciss_scsi.c +++ b/drivers/block/cciss_scsi.c @@ -714,7 +714,7 @@ cciss_scsi_detect(int ctlr) ((struct cciss_scsi_adapter_data_t *) hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh; sh->hostdata[0] = (unsigned long) hba[ctlr]; - sh->irq = hba[ctlr]->intr; + sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT]; sh->unique_id = sh->irq; error = scsi_add_host(sh, &hba[ctlr]->pdev->dev); if (error) -- cgit v1.2.3-59-g8ed1b