Hi Hawking,
This is a formal fix I think.
As you suggested, I tried to dump csb in various locations in gpu reset sequence:
1. after gfx_v10_0_hw_fini() completes - csb still contains correct data
|
v
baco reset
|
v
2. right after gmc resume - csb contains corrupted data
In this small time window, no firmware touches csb and it should prove that vram lost causes csb corrupt.
BR,
Xiaojie
________________________________________
From: Zhang, Hawking <Hawking.Zhang@xxxxxxx>
Sent: Wednesday, November 20, 2019 4:43 PM
To: Yuan, Xiaojie; amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Xiao, Jack; Long, Gang
Subject: RE: [PATCH] drm/amdgpu/gfx10: re-init clear state buffer after gpu reset
Just make sure I understand you correctly. So until fw team root cause the reason of csb corruption, we keep the workaround in driver, correct?
Regards,
Hawking
-----Original Message-----
From: Yuan, Xiaojie <Xiaojie.Yuan@xxxxxxx>
Sent: 2019年11月20日 14:47
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Xiao, Jack <Jack.Xiao@xxxxxxx>; Long, Gang <Gang.Long@xxxxxxx>; Yuan, Xiaojie <Xiaojie.Yuan@xxxxxxx>
Subject: [PATCH] drm/amdgpu/gfx10: re-init clear state buffer after gpu reset
This patch fixes 2nd baco reset failure with gfxoff enabled on navi1x.
clear state buffer (resides in vram) is corrupted after 1st baco reset, upon gfxoff exit, CPF gets garbage header in CSIB and hangs.
Signed-off-by: Xiaojie Yuan <xiaojie.yuan@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 43 ++++++++++++++++++++++----
1 file changed, 37 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 9274bd4b6c68..8e24ea08ca39 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -1789,27 +1789,52 @@ static void gfx_v10_0_enable_gui_idle_interrupt(struct amdgpu_device *adev,
WREG32_SOC15(GC, 0, mmCP_INT_CNTL_RING0, tmp); }
-static void gfx_v10_0_init_csb(struct amdgpu_device *adev)
+static int gfx_v10_0_init_csb(struct amdgpu_device *adev)
{
+ int r;
+
+ if (adev->in_gpu_reset) {
+ r = amdgpu_bo_reserve(adev->gfx.rlc.clear_state_obj, false);
+ if (r)
+ return r;
+
+ r = amdgpu_bo_kmap(adev->gfx.rlc.clear_state_obj,
+ (void **)&adev->gfx.rlc.cs_ptr);
+ if (!r) {
+ adev->gfx.rlc.funcs->get_csb_buffer(adev,
+ adev->gfx.rlc.cs_ptr);
+ amdgpu_bo_kunmap(adev->gfx.rlc.clear_state_obj);
+ }
+
+ amdgpu_bo_unreserve(adev->gfx.rlc.clear_state_obj);
+ if (r)
+ return r;
+ }
+
/* csib */
WREG32_SOC15(GC, 0, mmRLC_CSIB_ADDR_HI,
adev->gfx.rlc.clear_state_gpu_addr >> 32);
WREG32_SOC15(GC, 0, mmRLC_CSIB_ADDR_LO,
adev->gfx.rlc.clear_state_gpu_addr & 0xfffffffc);
WREG32_SOC15(GC, 0, mmRLC_CSIB_LENGTH, adev->gfx.rlc.clear_state_size);
+
+ return 0;
}
-static void gfx_v10_0_init_pg(struct amdgpu_device *adev)
+static int gfx_v10_0_init_pg(struct amdgpu_device *adev)
{
int i;
+ int r;
- gfx_v10_0_init_csb(adev);
+ r = gfx_v10_0_init_csb(adev);
+ if (r)
+ return r;
for (i = 0; i < adev->num_vmhubs; i++)
amdgpu_gmc_flush_gpu_tlb(adev, 0, i, 0);
/* TODO: init power gating */
- return;
+ return 0;
}
void gfx_v10_0_rlc_stop(struct amdgpu_device *adev) @@ -1911,7 +1936,10 @@ static int gfx_v10_0_rlc_resume(struct amdgpu_device *adev)
r = gfx_v10_0_wait_for_rlc_autoload_complete(adev);
if (r)
return r;
- gfx_v10_0_init_pg(adev);
+
+ r = gfx_v10_0_init_pg(adev);
+ if (r)
+ return r;
/* enable RLC SRM */
gfx_v10_0_rlc_enable_srm(adev);
@@ -1937,7 +1965,10 @@ static int gfx_v10_0_rlc_resume(struct amdgpu_device *adev)
return r;
}
- gfx_v10_0_init_pg(adev);
+ r = gfx_v10_0_init_pg(adev);
+ if (r)
+ return r;
+
adev->gfx.rlc.funcs->start(adev);
if (adev->firmware.load_type == AMDGPU_FW_LOAD_RLC_BACKDOOR_AUTO) {
--
2.20.1
_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
