Hi Christian,
Please review this v2 patch. It is slightly faster.
Thanks,
Alex Bin
________________________________
From: Xie, AlexBin
Sent: Wednesday, May 31, 2017 7:08 PM
To: amd-gfx at lists.freedesktop.org
Cc: Xie, AlexBin
Subject: [PATCH] drm/amdgpu: Move compute vm bug logic to amdgpu_vm.c
In review, Christian would like to keep the logic
inside amdgpu_vm.c with a cost of slightly slower.
The loop is still optimized out with this patch.
v2: remove the if statement. Now it is not slower.
Signed-off-by: Alex Xie <AlexBin.Xie at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 32 -------------------------
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 5 ----
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 38 ++++++++++++++++++++++++++++--
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 1 +
5 files changed, 39 insertions(+), 39 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 89bc34a..2f1a4e9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2227,6 +2227,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
adev->accel_working = true;
+ amdgpu_vm_check_compute_bug(adev);
+
/* Initialize the buffer migration limit. */
if (amdgpu_moverate >= 0)
max_MBps = amdgpu_moverate;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 7d95435..31aa51d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -153,36 +153,6 @@ void amdgpu_ring_undo(struct amdgpu_ring *ring)
}
/**
- * amdgpu_ring_check_compute_vm_bug - check whether this ring has compute vm bug
- *
- * @adev: amdgpu_device pointer
- * @ring: amdgpu_ring structure holding ring information
- */
-static void amdgpu_ring_check_compute_vm_bug(struct amdgpu_device *adev,
- struct amdgpu_ring *ring)
-{
- const struct amdgpu_ip_block *ip_block;
-
- ring->has_compute_vm_bug = false;
-
- if (ring->funcs->type != AMDGPU_RING_TYPE_COMPUTE)
- /* only compute rings */
- return;
-
- ip_block = amdgpu_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
- if (!ip_block)
- return;
-
- /* Compute ring has a VM bug for GFX version < 7.
- And compute ring has a VM bug for GFX 8 MEC firmware version < 673.*/
- if (ip_block->version->major <= 7) {
- ring->has_compute_vm_bug = true;
- } else if (ip_block->version->major == 8)
- if (adev->gfx.mec_fw_version < 673)
- ring->has_compute_vm_bug = true;
-}
-
-/**
* amdgpu_ring_init - init driver ring struct.
*
* @adev: amdgpu_device pointer
@@ -288,8 +258,6 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
DRM_ERROR("Failed to register debugfs file for rings !\n");
}
- amdgpu_ring_check_compute_vm_bug(adev, ring);
-
return 0;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index 334307e..ad399c8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -208,9 +208,4 @@ static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
}
-static inline bool amdgpu_ring_has_compute_vm_bug(struct amdgpu_ring *ring)
-{
- return ring->has_compute_vm_bug;
-}
-
#endif
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index d4d05a8..6e32748 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -656,6 +656,41 @@ static int amdgpu_vm_alloc_reserved_vmid(struct amdgpu_device *adev,
return r;
}
+/**
+ * amdgpu_vm_check_compute_bug - check whether asic has compute vm bug
+ *
+ * @adev: amdgpu_device pointer
+ */
+void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev)
+{
+ const struct amdgpu_ip_block *ip_block;
+ bool has_compute_vm_bug;
+ struct amdgpu_ring *ring;
+ int i;
+
+ has_compute_vm_bug = false;
+
+ ip_block = amdgpu_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
+ if (ip_block) {
+ /* Compute has a VM bug for GFX version < 7.
+ Compute has a VM bug for GFX 8 MEC firmware version < 673.*/
+ if (ip_block->version->major <= 7)
+ has_compute_vm_bug = true;
+ else if (ip_block->version->major == 8)
+ if (adev->gfx.mec_fw_version < 673)
+ has_compute_vm_bug = true;
+ }
+
+ for (i = 0; i < adev->num_rings; i++) {
+ ring = adev->rings[i];
+ if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE)
+ /* only compute rings */
+ ring->has_compute_vm_bug = has_compute_vm_bug;
+ else
+ ring->has_compute_vm_bug = false;
+ }
+}
+
bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
struct amdgpu_job *job)
{
@@ -664,8 +699,7 @@ bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
struct amdgpu_vm_id_manager *id_mgr = &adev->vm_manager.id_mgr[vmhub];
struct amdgpu_vm_id *id;
bool gds_switch_needed;
- bool vm_flush_needed = job->vm_needs_flush ||
- amdgpu_ring_has_compute_vm_bug(ring);
+ bool vm_flush_needed = job->vm_needs_flush || ring->has_compute_vm_bug;
if (job->vm_id == 0)
return false;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 8309bc7..f5dba9c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -245,5 +245,6 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint64_t vm_size);
int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
struct amdgpu_job *job);
+void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
#endif
--
2.7.4
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