Am 25.07.19 um 16:24 schrieb Andrey Grodzovsky:
Move the logic to clear AMDGPU_GEM_CREATE_CPU_GTT_USWC in
amdgpu_bo_do_create into standalone helper so it can be reused
in other functions.
v4:
Switch to return bool.
v5: Fix typos.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 61 +++++++++++++++++-------------
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 2 +
2 files changed, 37 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 989b7b5..8702062 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -413,6 +413,40 @@ static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
return false;
}
+bool amdgpu_bo_support_uswc(u64 bo_flags)
+{
+
+#ifdef CONFIG_X86_32
+ /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
+ * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
+ */
+ return false;
+#elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
+ /* Don't try to enable write-combining when it can't work, or things
+ * may be slow
+ * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
+ */
+
+#ifndef CONFIG_COMPILE_TEST
+#warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
+ thanks to write-combining
+#endif
+
+ if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
+ DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
+ "better performance thanks to write-combining\n");
I don't think this message belongs here.
+ return false;
+#else
+ /* For architectures that don't support WC memory,
+ * mask out the WC flag from the BO
+ */
+ if (!drm_arch_can_wc_memory())
+ return false;
+
+ return true;
+#endif
+}
+
static int amdgpu_bo_do_create(struct amdgpu_device *adev,
struct amdgpu_bo_param *bp,
struct amdgpu_bo **bo_ptr)
@@ -466,33 +500,8 @@ static int amdgpu_bo_do_create(struct amdgpu_device *adev,
bo->flags = bp->flags;
-#ifdef CONFIG_X86_32
- /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
- * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
- */
- bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-#elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
- /* Don't try to enable write-combining when it can't work, or things
- * may be slow
- * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
- */
-
-#ifndef CONFIG_COMPILE_TEST
-#warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
- thanks to write-combining
-#endif
-
- if (bo->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
- DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
- "better performance thanks to write-combining\n");
- bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
-#else
- /* For architectures that don't support WC memory,
- * mask out the WC flag from the BO
- */
- if (!drm_arch_can_wc_memory())
+ if (!amdgpu_bo_support_uswc(bo->flags))
bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
Rather here we should do "if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC
&& !amdgpu_bo_support_uswc())" and then clear the flag and also print
the warning.
Apart from that the series looks good to me,
Christian.
-#endif
bo->tbo.bdev = &adev->mman.bdev;
if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index d60593c..dc44cf3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -308,5 +308,7 @@ void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
struct seq_file *m);
#endif
+bool amdgpu_bo_support_uswc(u64 bo_flags);
+
#endif
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