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dmaengine: ioatdma: disable DCA enabling on IOATDMA v3.4

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IOATDMA v3.4 does not support DCA. Disable

Signed-off-by: Dave Jiang <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Dave Jiang 2019-02-22 09:59:59 -07:00 • committed by Vinod Koul
commit 11e31e281b
2 changed files with 3 additions and 0 deletions
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1
drivers/dma/ioat/hw.h
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@ -73,6 +73,7 @@
#define IOAT_VER_3_0 0x30 /* Version 3.0 */
#define IOAT_VER_3_2 0x32 /* Version 3.2 */
#define IOAT_VER_3_3 0x33 /* Version 3.3 */
#define IOAT_VER_3_4 0x34 /* Version 3.4 */
int system_has_dca_enabled(struct pci_dev *pdev);

2
drivers/dma/ioat/init.c
View file

@ -1353,6 +1353,8 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pci_set_drvdata(pdev, device);
device->version = readb(device->reg_base + IOAT_VER_OFFSET);
if (device->version >= IOAT_VER_3_4)
ioat_dca_enabled = 0;
if (device->version >= IOAT_VER_3_0) {
if (is_skx_ioat(pdev))
device->version = IOAT_VER_3_2;