leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

habanalabs: remove low credit limit of DMA #0

Browse Source 
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: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Oded Gabbay 2019-03-24 18:07:02 +02:00
parent 79a3aaa7b8
commit bfb57a91c2
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/misc/habanalabs/goya/goya.c
View File

@ -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,