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Commit 11e31e28 authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

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



IOATDMA v3.4 does not support DCA. Disable

Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 4d75873f

drivers/dma/ioat/hw.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/dma/ioat/init.c

+2 −0
Original line number Diff line number Diff line
@@ -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;