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>
diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h
index 685adb6..a3306d0 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 @@
#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 @@
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 */