drm/msm/gem: Drop PAGE_SHIFT for address space mm

Get rid of all the unnecessary conversion between address/size and page
offsets.  It just confuses things.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220411215849.297838-6-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

@@ -1172,7 +1172,7 @@ static int a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo,
 		return PTR_ERR(bo->obj);
 
 	ret = msm_gem_get_and_pin_iova_range(bo->obj, gmu->aspace, &bo->iova,
-		range_start >> PAGE_SHIFT, range_end >> PAGE_SHIFT);
+					     range_start, range_end);
 	if (ret) {
 		drm_gem_object_put(bo->obj);
 		return ret;

drivers/gpu/drm/msm/msm_gem.c

@@ -392,7 +392,7 @@ static int get_iova_locked(struct drm_gem_object *obj,
 		if (IS_ERR(vma))
 			return PTR_ERR(vma);
 
-		ret = msm_gem_init_vma(aspace, vma, obj->size >> PAGE_SHIFT,
+		ret = msm_gem_init_vma(aspace, vma, obj->size,
 			range_start, range_end);
 		if (ret) {
 			del_vma(vma);
@@ -434,8 +434,7 @@ static int msm_gem_pin_iova(struct drm_gem_object *obj,
 	if (IS_ERR(pages))
 		return PTR_ERR(pages);
 
-	ret = msm_gem_map_vma(aspace, vma, prot,
-			msm_obj->sgt, obj->size >> PAGE_SHIFT);
+	ret = msm_gem_map_vma(aspace, vma, prot, msm_obj->sgt, obj->size);
 
 	if (!ret)
 		msm_obj->pin_count++;

drivers/gpu/drm/msm/msm_gem.h

@@ -59,7 +59,7 @@ struct msm_gem_vma {
 };
 
 int msm_gem_init_vma(struct msm_gem_address_space *aspace,
-		struct msm_gem_vma *vma, int npages,
+		struct msm_gem_vma *vma, int size,
 		u64 range_start, u64 range_end);
 bool msm_gem_vma_inuse(struct msm_gem_vma *vma);
 void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
@@ -68,7 +68,7 @@ void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma);
 int msm_gem_map_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma, int prot,
-		struct sg_table *sgt, int npages);
+		struct sg_table *sgt, int size);
 void msm_gem_close_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma);
 

drivers/gpu/drm/msm/msm_gem_vma.c

@@ -46,7 +46,7 @@ bool msm_gem_vma_inuse(struct msm_gem_vma *vma)
 void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma)
 {
-	unsigned size = vma->node.size << PAGE_SHIFT;
+	unsigned size = vma->node.size;
 
 	/* Print a message if we try to purge a vma in use */
 	if (GEM_WARN_ON(msm_gem_vma_inuse(vma)))
@@ -73,9 +73,8 @@ void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
 int
 msm_gem_map_vma(struct msm_gem_address_space *aspace,
 		struct msm_gem_vma *vma, int prot,
-		struct sg_table *sgt, int npages)
+		struct sg_table *sgt, int size)
 {
-	unsigned size = npages << PAGE_SHIFT;
 	int ret = 0;
 
 	if (GEM_WARN_ON(!vma->iova))
@@ -120,7 +119,7 @@ void msm_gem_close_vma(struct msm_gem_address_space *aspace,
 
 /* Initialize a new vma and allocate an iova for it */
 int msm_gem_init_vma(struct msm_gem_address_space *aspace,
-		struct msm_gem_vma *vma, int npages,
+		struct msm_gem_vma *vma, int size,
 		u64 range_start, u64 range_end)
 {
 	int ret;
@@ -129,14 +128,15 @@ int msm_gem_init_vma(struct msm_gem_address_space *aspace,
 		return -EBUSY;
 
 	spin_lock(&aspace->lock);
-	ret = drm_mm_insert_node_in_range(&aspace->mm, &vma->node, npages, 0,
-		0, range_start, range_end, 0);
+	ret = drm_mm_insert_node_in_range(&aspace->mm, &vma->node,
+					  size, PAGE_SIZE, 0,
+					  range_start, range_end, 0);
 	spin_unlock(&aspace->lock);
 
 	if (ret)
 		return ret;
 
-	vma->iova = vma->node.start << PAGE_SHIFT;
+	vma->iova = vma->node.start;
 	vma->mapped = false;
 
 	kref_get(&aspace->kref);
@@ -161,7 +161,7 @@ msm_gem_address_space_create(struct msm_mmu *mmu, const char *name,
 	aspace->name = name;
 	aspace->mmu = mmu;
 
-	drm_mm_init(&aspace->mm, va_start >> PAGE_SHIFT, size >> PAGE_SHIFT);
+	drm_mm_init(&aspace->mm, va_start, size);
 
 	kref_init(&aspace->kref);