This workaround checks for channel 2&3 and remove RAID cap.
Signed-off-by: Dave Jiang <dave.ji...@intel.com>
Acked-by: Dan Williams <d...@fb.com>
---
drivers/dma/ioat/dma_v3.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 02afdb5..343320c 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -238,6 +238,18 @@ static bool is_bwd_ioat(struct pci_dev *pdev)
}
}
+static bool is_bwd_noraid(struct pci_dev *pdev)
+{
+ switch (pdev->device) {
+ case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
+ case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
+ return true;
+ default:
+ return false;
+ }
+
+}
+
static void pq16_set_src(struct ioat_raw_descriptor *desc[3],
dma_addr_t addr, u32 offset, u8 coef, int idx)
{
@@ -1813,6 +1825,9 @@ int ioat3_dma_probe(struct ioatdma_device *device, int
dca)
cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET);
+ if (is_bwd_noraid(pdev))
+ cap &= ~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS);
+
/* dca is incompatible with raid operations */
if (dca_en && (cap & (IOAT_CAP_XOR|IOAT_CAP_PQ)))
cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ);
--
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