I/OAT: Split PCI startup from DMA handling code

Split the general PCI startup from the DMA handling code in order to
prepare for adding support for DCA services and future versions of the
ioatdma device.

    [Rusty Russell] Removal of __unsafe() usage.

Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 14 insertions, 6 deletions

diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h
index bf4dad70e0f..0b8ffbde1e6 100644
--- a/drivers/dma/ioatdma.h
+++ b/drivers/dma/ioatdma.h
@@ -31,22 +31,21 @@
 #define IOAT_LOW_COMPLETION_MASK        0xffffffc0
 
 /**
- * struct ioat_device - internal representation of a IOAT device
+ * struct ioatdma_device - internal representation of a IOAT device
  * @pdev: PCI-Express device
  * @reg_base: MMIO register space base address
  * @dma_pool: for allocating DMA descriptors
  * @common: embedded struct dma_device
- * @msi: Message Signaled Interrupt number
+ * @version: version of ioatdma device
  */
 
-struct ioat_device {
+struct ioatdma_device {
         struct pci_dev *pdev;
         void __iomem *reg_base;
         struct pci_pool *dma_pool;
         struct pci_pool *completion_pool;
-
         struct dma_device common;
-        u8 msi;
+        u8 version;
 };
 
 /**
@@ -84,7 +83,7 @@ struct ioat_dma_chan {
 
         int pending;
 
-        struct ioat_device *device;
+        struct ioatdma_device *device;
         struct dma_chan common;
 
         dma_addr_t completion_addr;
@@ -117,4 +116,13 @@ struct ioat_desc_sw {
         struct dma_async_tx_descriptor async_tx;
 };
 
+#if defined(CONFIG_INTEL_IOATDMA) || defined(CONFIG_INTEL_IOATDMA_MODULE)
+struct ioatdma_device *ioat_dma_probe(struct pci_dev *pdev,
+                                      void __iomem *iobase);
+void ioat_dma_remove(struct ioatdma_device *device);
+#else
+#define ioat_dma_probe(pdev, iobase)    NULL
+#define ioat_dma_remove(device)         do { } while (0)
+#endif
+
 #endif /* IOATDMA_H */