Commit da5dfbb9 authored by Oded Gabbay's avatar Oded Gabbay
Browse files

habanalabs/gaudi: don't enable clock gating on DMA5 



Graph Compiler uses DMA5 in a non-standard way and it requires the
driver to disable clock gating on that DMA.

Signed-off-by: default avatarOded Gabbay <ogabbay@kernel.org>
parent 6df50d27

drivers/misc/habanalabs/gaudi/gaudi.c

+6 −0
Original line number Diff line number Diff line
@@ -3460,6 +3460,12 @@ static void gaudi_set_clock_gating(struct hl_device *hdev) 
		enable = !!(hdev->clock_gating_mask &

				(BIT_ULL(gaudi_dma_assignment[i])));



		/* GC sends work to DMA engine through Upper CP in DMA5 so

		 * we need to not enable clock gating in that DMA

		 */

		if (i == GAUDI_HBM_DMA_4)

			enable = 0;



		qman_offset = gaudi_dma_assignment[i] * DMA_QMAN_OFFSET;

		WREG32(mmDMA0_QM_CGM_CFG1 + qman_offset,

				enable ? QMAN_CGM1_PWR_GATE_EN : 0);