[PATCH 1/8] drm/amdgpu: cleanup kptr handling

[Christian König]

From: Christian König <christian.koenig at amd.com>

Don't keep around the same pointer twice.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c     |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 26 +++++++++++++++-----------
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c     |  4 ++--
 5 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index fe96236..c539bdd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -427,7 +427,6 @@ struct amdgpu_bo {
 	struct ttm_bo_kmap_obj		kmap;
 	u64				flags;
 	unsigned			pin_count;
-	void				*kptr;
 	u64				tiling_flags;
 	u64				metadata_flags;
 	void				*metadata;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index f0c8123..f48c780 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -246,7 +246,7 @@ static int amdgpufb_create(struct drm_fb_helper *helper,
 	tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
 	info->fix.smem_start = adev->mc.aper_base + tmp;
 	info->fix.smem_len = amdgpu_bo_size(abo);
-	info->screen_base = abo->kptr;
+	info->screen_base = amdgpu_bo_kptr(abo);
 	info->screen_size = amdgpu_bo_size(abo);
 
 	drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 3ec43cf..8fddea4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -609,16 +609,16 @@ int amdgpu_bo_restore_from_shadow(struct amdgpu_device *adev,
 
 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
 {
-	bool is_iomem;
+	void *kptr;
 	long r;
 
 	if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
 		return -EPERM;
 
-	if (bo->kptr) {
-		if (ptr) {
-			*ptr = bo->kptr;
-		}
+	kptr = amdgpu_bo_kptr(bo);
+	if (kptr) {
+		if (ptr)
+			*ptr = kptr;
 		return 0;
 	}
 
@@ -631,19 +631,23 @@ int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
 	if (r)
 		return r;
 
-	bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 	if (ptr)
-		*ptr = bo->kptr;
+		*ptr = amdgpu_bo_kptr(bo);
 
 	return 0;
 }
 
+void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
+{
+	bool is_iomem;
+
+	return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
+}
+
 void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
 {
-	if (bo->kptr == NULL)
-		return;
-	bo->kptr = NULL;
-	ttm_bo_kunmap(&bo->kmap);
+	if (bo->kmap.bo)
+		ttm_bo_kunmap(&bo->kmap);
 }
 
 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 833b172..f53d53d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -147,6 +147,7 @@ int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 			   void **cpu_addr);
 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr);
+void *amdgpu_bo_kptr(struct amdgpu_bo *bo);
 void amdgpu_bo_kunmap(struct amdgpu_bo *bo);
 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo);
 void amdgpu_bo_unref(struct amdgpu_bo **bo);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index fc482cc4..a1d4294 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1059,7 +1059,7 @@ static int amdgpu_vm_update_level(struct amdgpu_device *adev,
 	shadow = parent->bo->shadow;
 
 	if (vm->use_cpu_for_update) {
-		pd_addr = (unsigned long)parent->bo->kptr;
+		pd_addr = (unsigned long)amdgpu_bo_kptr(parent->bo);
 		r = amdgpu_vm_wait_pd(adev, vm, AMDGPU_FENCE_OWNER_VM);
 		if (unlikely(r))
 			return r;
@@ -1400,7 +1400,7 @@ static int amdgpu_vm_update_ptes(struct amdgpu_pte_update_params *params,
 
 		pt = entry->bo;
 		if (use_cpu_update) {
-			pe_start = (unsigned long)pt->kptr;
+			pe_start = (unsigned long)amdgpu_bo_kptr(pt);
 		} else {
 			if (pt->shadow) {
 				pe_start = amdgpu_bo_gpu_offset(pt->shadow);
-- 
2.7.4