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.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/block/cciss.h') diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h index 3b0858c83897..ad45e581a91d 100644 --- a/drivers/block/cciss.h +++ b/drivers/block/cciss.h @@ -65,7 +65,6 @@ struct ctlr_info unsigned long io_mem_addr; unsigned long io_mem_length; CfgTable_struct __iomem *cfgtable; - unsigned int intr; int interrupts_enabled; int major; int max_commands; @@ -74,6 +73,13 @@ struct ctlr_info int num_luns; int highest_lun; int usage_count; /* number of opens all all minor devices */ +# define DOORBELL_INT 0 +# define PERF_MODE_INT 1 +# define SIMPLE_MODE_INT 2 +# define MEMQ_MODE_INT 3 + unsigned int intr[4]; + unsigned int msix_vector; + unsigned int msi_vector; // information about each logical volume drive_info_struct drv[CISS_MAX_LUN]; -- cgit v1.2.3