drm/msm: remove duplicated code from a6xx_create_address_space

The function a6xx_create_address_space() is mostly a copy of
adreno_iommu_create_address_space() with added quirk setting. Rework
these two functions to be a thin wrappers around a common helper.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/509614/
Link: https://lore.kernel.org/r/20221102175449.452283-3-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Author: lumag

drivers/gpu/drm/msm/adreno/a3xx_gpu.c

@@ -500,7 +500,7 @@ static const struct adreno_gpu_funcs funcs = {
 #endif
 		.gpu_state_get = a3xx_gpu_state_get,
 		.gpu_state_put = adreno_gpu_state_put,
-		.create_address_space = adreno_iommu_create_address_space,
+		.create_address_space = adreno_create_address_space,
 		.get_rptr = a3xx_get_rptr,
 	},
 };

drivers/gpu/drm/msm/adreno/a4xx_gpu.c

@@ -635,7 +635,7 @@ static const struct adreno_gpu_funcs funcs = {
 #endif
 		.gpu_state_get = a4xx_gpu_state_get,
 		.gpu_state_put = adreno_gpu_state_put,
-		.create_address_space = adreno_iommu_create_address_space,
+		.create_address_space = adreno_create_address_space,
 		.get_rptr = a4xx_get_rptr,
 	},
 	.get_timestamp = a4xx_get_timestamp,

drivers/gpu/drm/msm/adreno/a5xx_gpu.c

@@ -1705,7 +1705,7 @@ static const struct adreno_gpu_funcs funcs = {
 		.gpu_busy = a5xx_gpu_busy,
 		.gpu_state_get = a5xx_gpu_state_get,
 		.gpu_state_put = a5xx_gpu_state_put,
-		.create_address_space = adreno_iommu_create_address_space,
+		.create_address_space = adreno_create_address_space,
 		.get_rptr = a5xx_get_rptr,
 	},
 	.get_timestamp = a5xx_get_timestamp,

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -1786,10 +1786,6 @@ a6xx_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev)
 {
 	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 	struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
-	struct iommu_domain_geometry *geometry;
-	struct msm_mmu *mmu;
-	struct msm_gem_address_space *aspace;
-	u64 start, size;
 	unsigned long quirks = 0;
 
 	/*
@@ -1799,29 +1795,7 @@ a6xx_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev)
 	if (!IS_ERR_OR_NULL(a6xx_gpu->htw_llc_slice))
 		quirks |= IO_PGTABLE_QUIRK_ARM_OUTER_WBWA;
 
-	mmu = msm_iommu_new(&pdev->dev, quirks);
-	if (IS_ERR_OR_NULL(mmu))
-		return ERR_CAST(mmu);
-
-	geometry = msm_iommu_get_geometry(mmu);
-	if (IS_ERR(geometry))
-		return ERR_CAST(geometry);
-
-	/*
-	 * Use the aperture start or SZ_16M, whichever is greater. This will
-	 * ensure that we align with the allocated pagetable range while still
-	 * allowing room in the lower 32 bits for GMEM and whatnot
-	 */
-	start = max_t(u64, SZ_16M, geometry->aperture_start);
-	size = geometry->aperture_end - start + 1;
-
-	aspace = msm_gem_address_space_create(mmu, "gpu",
-		start & GENMASK_ULL(48, 0), size);
-
-	if (IS_ERR(aspace) && !IS_ERR(mmu))
-		mmu->funcs->destroy(mmu);
-
-	return aspace;
+	return adreno_iommu_create_address_space(gpu, pdev, quirks);
 }
 
 static struct msm_gem_address_space *

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

@@ -191,16 +191,24 @@ int adreno_zap_shader_load(struct msm_gpu *gpu, u32 pasid)
 	return zap_shader_load_mdt(gpu, adreno_gpu->info->zapfw, pasid);
 }
 
+struct msm_gem_address_space *
+adreno_create_address_space(struct msm_gpu *gpu,
+			    struct platform_device *pdev)
+{
+	return adreno_iommu_create_address_space(gpu, pdev, 0);
+}
+
 struct msm_gem_address_space *
 adreno_iommu_create_address_space(struct msm_gpu *gpu,
-		struct platform_device *pdev)
+				  struct platform_device *pdev,
+				  unsigned long quirks)
 {
 	struct iommu_domain_geometry *geometry;
 	struct msm_mmu *mmu;
 	struct msm_gem_address_space *aspace;
 	u64 start, size;
 
-	mmu = msm_iommu_new(&pdev->dev, 0);
+	mmu = msm_iommu_new(&pdev->dev, quirks);
 	if (IS_ERR_OR_NULL(mmu))
 		return ERR_CAST(mmu);
 

drivers/gpu/drm/msm/adreno/adreno_gpu.h

@@ -335,8 +335,13 @@ void adreno_show_object(struct drm_printer *p, void **ptr, int len,
  * attached targets
  */
 struct msm_gem_address_space *
+adreno_create_address_space(struct msm_gpu *gpu,
+			    struct platform_device *pdev);
+
+struct msm_gem_address_space *
 adreno_iommu_create_address_space(struct msm_gpu *gpu,
-		struct platform_device *pdev);
+				  struct platform_device *pdev,
+				  unsigned long quirks);
 
 int adreno_read_speedbin(struct device *dev, u32 *speedbin);