[PATCH] drm/amdgpu: fix mqd corruption for gfx12

[Min, Frank]

[AMD Official Use Only - General]

From: Frank Min <Frank.Min at amd.com>

1. restore mqd from backup while resuming

2. use copy_toio and copy_fromio while mqd in vram

Signed-off-by: Frank Min <Frank.Min at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
index 0bb119be2284..974219386e47 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
@@ -2720,17 +2720,15 @@ static int gfx_v12_0_gfx_init_queue(struct amdgpu_ring *ring)
                soc24_grbm_select(adev, 0, 0, 0, 0);
                mutex_unlock(&adev->srbm_mutex);
                if (adev->gfx.me.mqd_backup[mqd_idx])
-                       memcpy(adev->gfx.me.mqd_backup[mqd_idx], mqd, sizeof(*mqd));
-       } else if (amdgpu_in_reset(adev)) {
-               /* reset mqd with the backup copy */
+                       memcpy_fromio(adev->gfx.me.mqd_backup[mqd_idx], mqd, sizeof(*mqd));
+       } else {
+               /* restore mqd with the backup copy */
                if (adev->gfx.me.mqd_backup[mqd_idx])
-                       memcpy(mqd, adev->gfx.me.mqd_backup[mqd_idx], sizeof(*mqd));
+                       memcpy_toio(mqd, adev->gfx.me.mqd_backup[mqd_idx], sizeof(*mqd));
                /* reset the ring */
                ring->wptr = 0;
                *ring->wptr_cpu_addr = 0;
                amdgpu_ring_clear_ring(ring);
-       } else {
-               amdgpu_ring_clear_ring(ring);
        }

        return 0;
@@ -3091,18 +3089,15 @@ static int gfx_v12_0_kcq_init_queue(struct amdgpu_ring *ring)
                mutex_unlock(&adev->srbm_mutex);

                if (adev->gfx.mec.mqd_backup[mqd_idx])
-                       memcpy(adev->gfx.mec.mqd_backup[mqd_idx], mqd, sizeof(*mqd));
-       } else if (amdgpu_in_reset(adev)) { /* for GPU_RESET case */
-               /* reset MQD to a clean status */
+                       memcpy_fromio(adev->gfx.mec.mqd_backup[mqd_idx], mqd, sizeof(*mqd));
+       } else {
+               /* restore MQD to a clean status */
                if (adev->gfx.mec.mqd_backup[mqd_idx])
-                       memcpy(mqd, adev->gfx.mec.mqd_backup[mqd_idx], sizeof(*mqd));
-
+                       memcpy_toio(mqd, adev->gfx.mec.mqd_backup[mqd_idx], sizeof(*mqd));
                /* reset ring buffer */
                ring->wptr = 0;
                atomic64_set((atomic64_t *)ring->wptr_cpu_addr, 0);
                amdgpu_ring_clear_ring(ring);
-       } else {
-               amdgpu_ring_clear_ring(ring);
        }

        return 0;
--
2.34.1