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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 <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Dave Jiang 2013-04-10 16:44:32 -07:00 committed by Vinod Koul
parent 7727eaa449
commit d302398da9
1 changed files with 15 additions and 0 deletions
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15
drivers/dma/ioat/dma_v3.c
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@ -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);