From d302398da99956a329c467f195b50d5aaf38fb75 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Wed, 10 Apr 2013 16:44:32 -0700 Subject: ioatdma: S1200 platforms ioatdma channel 2 and 3 falsely advertise RAID cap This workaround checks for channel 2&3 and remove RAID cap. Signed-off-by: Dave Jiang Acked-by: Dan Williams Signed-off-by: Vinod Koul --- drivers/dma/ioat/dma_v3.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/dma') diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index 71e113dfc8cc..b00b000f238b 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) { @@ -1808,6 +1820,9 @@ 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); -- cgit v1.2.3-59-g8ed1b