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Commit bfb57a91 authored by Oded Gabbay's avatar Oded Gabbay
Browse files

habanalabs: remove low credit limit of DMA #0 



Because DMA #0 is now used by the user, remove the limitation of credits
from this channel. Without this patch, this channel is pretty much
unusable due to its very low bandwidth configuration.

Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent 79a3aaa7

drivers/misc/habanalabs/goya/goya.c

+4 −5
Original line number Diff line number Diff line
@@ -1688,12 +1688,11 @@ static void goya_init_golden_registers(struct hl_device *hdev) 


	/*

	 * Workaround for H2 #HW-23 bug

	 * Set DMA max outstanding read requests to 240 on DMA CH 1. Set it

	 * to 16 on KMD DMA

	 * We need to limit only these DMAs because the user can only read

	 * Set DMA max outstanding read requests to 240 on DMA CH 1.

	 * This limitation is still large enough to not affect Gen4 bandwidth.

	 * We need to only limit that DMA channel because the user can only read

	 * from Host using DMA CH 1

	 */

	WREG32(mmDMA_CH_0_CFG0, 0x0fff0010);

	WREG32(mmDMA_CH_1_CFG0, 0x0fff00F0);



	goya->hw_cap_initialized |= HW_CAP_GOLDEN;
@@ -3693,7 +3692,7 @@ static int goya_validate_dma_pkt_mmu(struct hl_device *hdev, 
	 * WA for HW-23.

	 * We can't allow user to read from Host using QMANs other than 1.

	 */

	if (parser->hw_queue_id > GOYA_QUEUE_ID_DMA_1 &&

	if (parser->hw_queue_id != GOYA_QUEUE_ID_DMA_1 &&

		hl_mem_area_inside_range(le64_to_cpu(user_dma_pkt->src_addr),

				le32_to_cpu(user_dma_pkt->tsize),

				hdev->asic_prop.va_space_host_start_address,