ioat: Add alignment workaround for IVB platforms

The PCI IDs for IvyBridge IOAT DMA needs to go into a header file since
dma_v3.c looks them up for certain hardware workarounds. Need to add to the
alignment workaround for IOAT 3.2 since it wasn't fixed in IVB.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <djbw@fb.com>

1 files changed, 21 insertions, 1 deletions

diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 6456f7d38e13..9d6f3bbf0e53 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -1229,6 +1229,26 @@ static bool is_snb_ioat(struct pci_dev *pdev)
         }
 }
 
+static bool is_ivb_ioat(struct pci_dev *pdev)
+{
+        switch (pdev->device) {
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB0:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB1:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB2:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB3:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB4:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB5:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB6:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB7:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB8:
+        case PCI_DEVICE_ID_INTEL_IOAT_IVB9:
+                return true;
+        default:
+                return false;
+        }
+
+}
+
 int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
 {
         struct pci_dev *pdev = device->pdev;
@@ -1249,7 +1269,7 @@ int __devinit ioat3_dma_probe(struct ioatdma_device *device, int dca)
         dma->device_alloc_chan_resources = ioat2_alloc_chan_resources;
         dma->device_free_chan_resources = ioat2_free_chan_resources;
 
-        if (is_jf_ioat(pdev) || is_snb_ioat(pdev))
+        if (is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev))
                 dma->copy_align = 6;
 
         dma_cap_set(DMA_INTERRUPT, dma->cap_mask);