6.12-stable review patch. If anyone has any objections, please let me know.
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From: Lijo Lazar lijo.lazar@amd.com
[ Upstream commit fa31798582882740f2b13d19e1bd43b4ef918e2f ]
In current logic, it calls ring_alloc followed by a ring_test. ring_test in turn will call another ring_alloc. This is illegal usage as a ring_alloc is expected to be closed properly with a ring_commit. Change to commit the map/unmap queue packet first followed by a ring_test. Add a comment about the usage of ring_test.
Also, reorder the current pre-condition checks of job hang or kiq ring scheduler not ready. Without them being met, it is not useful to attempt ring or memory allocations.
Fixes tag refers to the original patch which introduced this issue which then got carried over into newer code.
Signed-off-by: Lijo Lazar lijo.lazar@amd.com Reviewed-by: Le Ma le.ma@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Fixes: 6c10b5cc4eaa ("drm/amdgpu: Remove duplicate code in gfx_v8_0.c") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 13 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 63 +++++++++++++++------- drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 7 +++ 3 files changed, 63 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index 4f08b153cb66d..e41318bfbf457 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -834,6 +834,9 @@ int amdgpu_amdkfd_unmap_hiq(struct amdgpu_device *adev, u32 doorbell_off, if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues) return -EINVAL;
+ if (!kiq_ring->sched.ready || adev->job_hang) + return 0; + ring_funcs = kzalloc(sizeof(*ring_funcs), GFP_KERNEL); if (!ring_funcs) return -ENOMEM; @@ -858,8 +861,14 @@ int amdgpu_amdkfd_unmap_hiq(struct amdgpu_device *adev, u32 doorbell_off,
kiq->pmf->kiq_unmap_queues(kiq_ring, ring, RESET_QUEUES, 0, 0);
- if (kiq_ring->sched.ready && !adev->job_hang) - r = amdgpu_ring_test_helper(kiq_ring); + /* Submit unmap queue packet */ + amdgpu_ring_commit(kiq_ring); + /* + * Ring test will do a basic scratch register change check. Just run + * this to ensure that unmap queues that is submitted before got + * processed successfully before returning. + */ + r = amdgpu_ring_test_helper(kiq_ring);
spin_unlock(&kiq->ring_lock);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c index f1ffab5a1eaed..156abd2ba5a6c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c @@ -525,6 +525,17 @@ int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev, int xcc_id) if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues) return -EINVAL;
+ if (!kiq_ring->sched.ready || adev->job_hang) + return 0; + /** + * This is workaround: only skip kiq_ring test + * during ras recovery in suspend stage for gfx9.4.3 + */ + if ((amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 3) || + amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 4)) && + amdgpu_ras_in_recovery(adev)) + return 0; + spin_lock(&kiq->ring_lock); if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size * adev->gfx.num_compute_rings)) { @@ -538,20 +549,15 @@ int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev, int xcc_id) &adev->gfx.compute_ring[j], RESET_QUEUES, 0, 0); } - - /** - * This is workaround: only skip kiq_ring test - * during ras recovery in suspend stage for gfx9.4.3 + /* Submit unmap queue packet */ + amdgpu_ring_commit(kiq_ring); + /* + * Ring test will do a basic scratch register change check. Just run + * this to ensure that unmap queues that is submitted before got + * processed successfully before returning. */ - if ((amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 3) || - amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 4)) && - amdgpu_ras_in_recovery(adev)) { - spin_unlock(&kiq->ring_lock); - return 0; - } + r = amdgpu_ring_test_helper(kiq_ring);
- if (kiq_ring->sched.ready && !adev->job_hang) - r = amdgpu_ring_test_helper(kiq_ring); spin_unlock(&kiq->ring_lock);
return r; @@ -579,8 +585,11 @@ int amdgpu_gfx_disable_kgq(struct amdgpu_device *adev, int xcc_id) if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues) return -EINVAL;
- spin_lock(&kiq->ring_lock); + if (!adev->gfx.kiq[0].ring.sched.ready || adev->job_hang) + return 0; + if (amdgpu_gfx_is_master_xcc(adev, xcc_id)) { + spin_lock(&kiq->ring_lock); if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size * adev->gfx.num_gfx_rings)) { spin_unlock(&kiq->ring_lock); @@ -593,11 +602,17 @@ int amdgpu_gfx_disable_kgq(struct amdgpu_device *adev, int xcc_id) &adev->gfx.gfx_ring[j], PREEMPT_QUEUES, 0, 0); } - } + /* Submit unmap queue packet */ + amdgpu_ring_commit(kiq_ring);
- if (adev->gfx.kiq[0].ring.sched.ready && !adev->job_hang) + /* + * Ring test will do a basic scratch register change check. + * Just run this to ensure that unmap queues that is submitted + * before got processed successfully before returning. + */ r = amdgpu_ring_test_helper(kiq_ring); - spin_unlock(&kiq->ring_lock); + spin_unlock(&kiq->ring_lock); + }
return r; } @@ -702,7 +717,13 @@ int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev, int xcc_id) kiq->pmf->kiq_map_queues(kiq_ring, &adev->gfx.compute_ring[j]); } - + /* Submit map queue packet */ + amdgpu_ring_commit(kiq_ring); + /* + * Ring test will do a basic scratch register change check. Just run + * this to ensure that map queues that is submitted before got + * processed successfully before returning. + */ r = amdgpu_ring_test_helper(kiq_ring); spin_unlock(&kiq->ring_lock); if (r) @@ -753,7 +774,13 @@ int amdgpu_gfx_enable_kgq(struct amdgpu_device *adev, int xcc_id) &adev->gfx.gfx_ring[j]); } } - + /* Submit map queue packet */ + amdgpu_ring_commit(kiq_ring); + /* + * Ring test will do a basic scratch register change check. Just run + * this to ensure that map queues that is submitted before got + * processed successfully before returning. + */ r = amdgpu_ring_test_helper(kiq_ring); spin_unlock(&kiq->ring_lock); if (r) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index bc8295812cc84..9d741695ca07d 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -4823,6 +4823,13 @@ static int gfx_v8_0_kcq_disable(struct amdgpu_device *adev) amdgpu_ring_write(kiq_ring, 0); amdgpu_ring_write(kiq_ring, 0); } + /* Submit unmap queue packet */ + amdgpu_ring_commit(kiq_ring); + /* + * Ring test will do a basic scratch register change check. Just run + * this to ensure that unmap queues that is submitted before got + * processed successfully before returning. + */ r = amdgpu_ring_test_helper(kiq_ring); if (r) DRM_ERROR("KCQ disable failed\n");