I/OAT: Add support for MSI and MSI-X
Add support for MSI and MSI-X interrupt handling, including the ability
to choose the desired interrupt method.
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
[bunk@kernel.org: drivers/dma/ioat_dma.c: make 3 functions static]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h
index 0b8ffbd..2abf0b8 100644
--- a/drivers/dma/ioatdma.h
+++ b/drivers/dma/ioatdma.h
@@ -28,6 +28,14 @@
#include <linux/cache.h>
#include <linux/pci_ids.h>
+enum ioat_interrupt {
+ none = 0,
+ msix_multi_vector = 1,
+ msix_single_vector = 2,
+ msi = 3,
+ intx = 4,
+};
+
#define IOAT_LOW_COMPLETION_MASK 0xffffffc0
/**
@@ -46,6 +54,9 @@
struct pci_pool *completion_pool;
struct dma_device common;
u8 version;
+ enum ioat_interrupt irq_mode;
+ struct msix_entry msix_entries[4];
+ struct ioat_dma_chan *idx[4];
};
/**
@@ -94,6 +105,7 @@
u32 high;
};
} *completion_virt;
+ struct tasklet_struct cleanup_task;
};
/* wrapper around hardware descriptor format + additional software fields */