From 13cffa0d74dc3257baaf905886bf68f65d6e010e Mon Sep 17 00:00:00 2001 From: xinhui pan Date: Thu, 9 May 2019 09:00:14 +0800 Subject: [PATCH 1935/2940] drm/amdgpu: sdma handle ras resume During S3/S4 bootloader will re-init ras state behind us. Resume might fail or raise a gpu reset. Signed-off-by: xinhui pan Reviewed-by: Alex Deucher Reviewed-by: James Zhu Tested-by: James Zhu --- drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c index 9daaa12fdb3e..f38decbbf194 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c @@ -1525,8 +1525,25 @@ static int sdma_v4_0_late_init(void *handle) } /* handle resume path. */ - if (*ras_if) + if (*ras_if) { + /* resend ras TA enable cmd during resume. + * prepare to handle failure. + */ + ih_info.head = **ras_if; + r = amdgpu_ras_feature_enable_on_boot(adev, *ras_if, 1); + if (r) { + if (r == -EAGAIN) { + /* request a gpu reset. will run again. */ + amdgpu_ras_request_reset_on_boot(adev, + AMDGPU_RAS_BLOCK__SDMA); + return 0; + } + /* fail to enable ras, cleanup all. */ + goto irq; + } + /* enable successfully. continue. */ goto resume; + } *ras_if = kmalloc(sizeof(**ras_if), GFP_KERNEL); if (!*ras_if) -- 2.17.1