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From 6406924c7b198dd53859bccb968b0475d808fefd Mon Sep 17 00:00:00 2001
From: xinhui pan <xinhui.pan@amd.com>
Date: Thu, 9 May 2019 08:58:56 +0800
Subject: [PATCH 1934/2940] drm/amdgpu: gfx 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 <xinhui.pan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Tested-by: James Zhu <James.Zhu@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 09b82ee99342..58c1d883c913 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3817,8 +3817,26 @@ static int gfx_v9_0_ecc_late_init(void *handle)
if (r)
return r;
- if (*ras_if)
+ /* handle resume path. */
+ 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__GFX);
+ 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
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