Commit 11e31e28 authored Feb 22, 2019 by Dave Jiang Committed by Vinod Koul Feb 25, 2019

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



IOATDMA v3.4 does not support DCA. Disable

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod 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;