I/OAT: I/OAT version 3.0 support

This patch adds to ioatdma and dca modules
support for Intel I/OAT DMA engine ver.3 (aka CB3 device).
The main features of I/OAT ver.3 are:
 * 8 single channel DMA devices (8 channels total)
 * 8 DCA providers, each can accept 2 requesters
 * 8-bit TAG values and 32-bit extended APIC IDs

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h
index 685adb62aa5a..a3306d0e1372 100644
--- a/drivers/dma/ioatdma.h
+++ b/drivers/dma/ioatdma.h
@@ -29,7 +29,7 @@
 #include <linux/pci_ids.h>
 #include <net/tcp.h>
 
-#define IOAT_DMA_VERSION  "2.18"
+#define IOAT_DMA_VERSION  "3.30"
 
 enum ioat_interrupt {
         none = 0,
@@ -135,6 +135,7 @@ static inline void ioat_set_tcp_copy_break(struct ioatdma_device *dev)
         #ifdef CONFIG_NET_DMA
         switch (dev->version) {
         case IOAT_VER_1_2:
+        case IOAT_VER_3_0:
                 sysctl_tcp_dma_copybreak = 4096;
                 break;
         case IOAT_VER_2_0:
@@ -150,11 +151,13 @@ struct ioatdma_device *ioat_dma_probe(struct pci_dev *pdev,
 void ioat_dma_remove(struct ioatdma_device *device);
 struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase);
 struct dca_provider *ioat2_dca_init(struct pci_dev *pdev, void __iomem *iobase);
+struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase);
 #else
 #define ioat_dma_probe(pdev, iobase)    NULL
 #define ioat_dma_remove(device)         do { } while (0)
 #define ioat_dca_init(pdev, iobase)     NULL
 #define ioat2_dca_init(pdev, iobase)    NULL
+#define ioat3_dca_init(pdev, iobase)    NULL
 #endif
 
 #endif /* IOATDMA_H */