Re: [PATCH 3/6] drm/i915: Extend magic to_i915() to work with drm_i915_gem_object

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On 18/03/16 21:16, Chris Wilson wrote:
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_debugfs.c        |  7 +++---
  drivers/gpu/drm/i915/i915_drv.h            | 15 ++++++++-----
  drivers/gpu/drm/i915/i915_gem.c            | 34 +++++++++++++-----------------
  drivers/gpu/drm/i915/i915_gem_execbuffer.c | 17 ++++++---------
  drivers/gpu/drm/i915/i915_gem_fence.c      |  8 +++----
  drivers/gpu/drm/i915/i915_gem_gtt.c        |  2 +-
  drivers/gpu/drm/i915/i915_gem_stolen.c     |  4 +---
  drivers/gpu/drm/i915/i915_gem_tiling.c     |  4 ++--
  drivers/gpu/drm/i915/i915_gem_userptr.c    |  4 ++--
  drivers/gpu/drm/i915/intel_ringbuffer.c    |  2 +-
  10 files changed, 46 insertions(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e0ba3e38000f..33ddcdf6d046 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -128,7 +128,6 @@ static u64 i915_gem_obj_total_ggtt_size(struct drm_i915_gem_object *obj)
  static void
  describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
  {
-	struct drm_i915_private *dev_priv = to_i915(obj->base.dev);
  	struct intel_engine_cs *engine;
  	struct i915_vma *vma;
  	int pin_count = 0;
@@ -143,13 +142,13 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
  		   obj->base.size / 1024,
  		   obj->base.read_domains,
  		   obj->base.write_domain);
-	for_each_engine(engine, dev_priv, i)
+	for_each_engine(engine, obj, i)
  		seq_printf(m, "%x ",
  				i915_gem_request_get_seqno(obj->last_read_req[i]));
  	seq_printf(m, "] %x %x%s%s%s",
  		   i915_gem_request_get_seqno(obj->last_write_req),
  		   i915_gem_request_get_seqno(obj->last_fenced_req),
-		   i915_cache_level_str(to_i915(obj->base.dev), obj->cache_level),
+		   i915_cache_level_str(to_i915(obj), obj->cache_level),
  		   obj->dirty ? " dirty" : "",
  		   obj->madv == I915_MADV_DONTNEED ? " purgeable" : "");
  	if (obj->base.name)
@@ -339,7 +338,7 @@ static int per_file_stats(int id, void *ptr, void *data)
  	if (obj->base.name || obj->base.dma_buf)
  		stats->shared += obj->base.size;

-	if (USES_FULL_PPGTT(obj->base.dev)) {
+	if (USES_FULL_PPGTT(obj)) {
  		list_for_each_entry(vma, &obj->vma_list, obj_link) {
  			struct i915_hw_ppgtt *ppgtt;

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 0c9fe00d3e83..92365f047e53 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2186,6 +2186,12 @@ struct drm_i915_gem_object {
  };
  #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base)

+static inline struct drm_i915_private *
+__obj_to_i915(const struct drm_i915_gem_object *obj)
+{
+	return __to_i915(obj->base.dev);
+}
+
  void i915_gem_track_fb(struct drm_i915_gem_object *old,
  		       struct drm_i915_gem_object *new,
  		       unsigned frontbuffer_bits);
@@ -2455,6 +2461,8 @@ struct drm_i915_cmd_table {
  		__p = (struct drm_i915_private *)p; \
  	else if (__builtin_types_compatible_p(typeof(*p), struct drm_device)) \
  		__p = __to_i915((struct drm_device *)p); \
+	else if (__builtin_types_compatible_p(typeof(*p), struct drm_i915_gem_object)) \
+		__p = __obj_to_i915((struct drm_i915_gem_object *)p); \
  	else \
  		BUILD_BUG(); \
  	__p; \
@@ -3132,8 +3140,7 @@ i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj)
  bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj);

  /* Some GGTT VM helpers */
-#define i915_obj_to_ggtt(obj) \
-	(&((struct drm_i915_private *)(obj)->base.dev->dev_private)->ggtt.base)
+#define i915_obj_to_ggtt(obj) (&to_i915(obj)->ggtt.base)

  static inline struct i915_hw_ppgtt *
  i915_vm_to_ppgtt(struct i915_address_space *vm)
@@ -3282,9 +3289,7 @@ void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv);
  /* i915_gem_tiling.c */
  static inline bool i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj)
  {
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
-
-	return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 &&
+	return to_i915(obj)->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 &&
  		obj->tiling_mode != I915_TILING_NONE;
  }

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 8588c83abb35..710a6bbc985e 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -361,14 +361,12 @@ out:

  void *i915_gem_object_alloc(struct drm_device *dev)
  {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	return kmem_cache_zalloc(dev_priv->objects, GFP_KERNEL);
+	return kmem_cache_zalloc(to_i915(dev)->objects, GFP_KERNEL);
  }

  void i915_gem_object_free(struct drm_i915_gem_object *obj)
  {
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
-	kmem_cache_free(dev_priv->objects, obj);
+	kmem_cache_free(to_i915(obj)->objects, obj);
  }

  static int
@@ -2028,7 +2026,7 @@ i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,

  static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj)
  {
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	int ret;

  	if (drm_vma_node_has_offset(&obj->base.vma_node))
@@ -2241,7 +2239,7 @@ i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
  static int
  i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
  {
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	int page_count, i;
  	struct address_space *mapping;
  	struct sg_table *st;
@@ -2372,7 +2370,7 @@ err_pages:
  int
  i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
  {
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	const struct drm_i915_gem_object_ops *ops = obj->ops;
  	int ret;

@@ -2449,8 +2447,7 @@ i915_gem_object_retire__read(struct drm_i915_gem_object *obj, int ring)
  	 * so that we don't steal from recently used but inactive objects
  	 * (unless we are forced to ofc!)
  	 */
-	list_move_tail(&obj->global_list,
-		       &to_i915(obj->base.dev)->mm.bound_list);
+	list_move_tail(&obj->global_list, &to_i915(obj)->mm.bound_list);

  	list_for_each_entry(vma, &obj->vma_list, obj_link) {
  		if (!list_empty(&vma->vm_link))
@@ -3172,7 +3169,7 @@ __i915_gem_object_sync(struct drm_i915_gem_object *obj,
  		return 0;

  	if (!i915_semaphore_is_enabled(obj->base.dev)) {
-		struct drm_i915_private *i915 = to_i915(obj->base.dev);
+		struct drm_i915_private *i915 = to_i915(obj);
  		ret = __i915_wait_request(from_req,
  					  atomic_read(&i915->gpu_error.reset_counter),
  					  i915->mm.interruptible,
@@ -3312,7 +3309,7 @@ static void i915_gem_object_finish_gtt(struct drm_i915_gem_object *obj)
  static int __i915_vma_unbind(struct i915_vma *vma, bool wait)
  {
  	struct drm_i915_gem_object *obj = vma->obj;
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	int ret;

  	if (list_empty(&vma->obj_link))
@@ -3772,7 +3769,7 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
  	vma = i915_gem_obj_to_ggtt(obj);
  	if (vma && drm_mm_node_allocated(&vma->node) && !obj->active)
  		list_move_tail(&vma->vm_link,
-			       &to_i915(obj->base.dev)->ggtt.base.inactive_list);
+			       &to_i915(obj)->ggtt.base.inactive_list);

  	return 0;
  }
@@ -4010,7 +4007,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
  	 * with that bit in the PTE to main memory with just one PIPE_CONTROL.
  	 */
  	ret = i915_gem_object_set_cache_level(obj,
-					      HAS_WT(obj->base.dev) ? I915_CACHE_WT : I915_CACHE_NONE);
+					      HAS_WT(obj) ? I915_CACHE_WT : I915_CACHE_NONE);
  	if (ret)
  		goto err_unpin_display;

@@ -4209,7 +4206,7 @@ void __i915_vma_set_map_and_fenceable(struct i915_vma *vma)
  		     (vma->node.start & (fence_alignment - 1)) == 0);

  	mappable = (vma->node.start + fence_size <=
-		    to_i915(obj->base.dev)->ggtt.mappable_end);
+		    to_i915(obj)->ggtt.mappable_end);

  	obj->map_and_fenceable = mappable && fenceable;
  }
@@ -4221,7 +4218,7 @@ i915_gem_object_do_pin(struct drm_i915_gem_object *obj,
  		       uint32_t alignment,
  		       uint64_t flags)
  {
-	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	struct i915_vma *vma;
  	unsigned bound;
  	int ret;
@@ -4456,7 +4453,7 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
  	obj->fence_reg = I915_FENCE_REG_NONE;
  	obj->madv = I915_MADV_WILLNEED;

-	i915_gem_info_add_obj(obj->base.dev->dev_private, obj->base.size);
+	i915_gem_info_add_obj(to_i915(obj), obj->base.size);
  }

  static const struct drm_i915_gem_object_ops i915_gem_object_ops = {
@@ -4545,8 +4542,7 @@ static bool discard_backing_storage(struct drm_i915_gem_object *obj)
  void i915_gem_free_object(struct drm_gem_object *gem_obj)
  {
  	struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);
-	struct drm_device *dev = obj->base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	struct i915_vma *vma, *next;

  	intel_runtime_pm_get(dev_priv);
@@ -4647,7 +4643,7 @@ void i915_gem_vma_destroy(struct i915_vma *vma)

  	list_del(&vma->obj_link);

-	kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma);
+	kmem_cache_free(to_i915(vma->obj)->vmas, vma);
  }

  static void
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 374a0cb7a092..39ed403b9de3 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -241,7 +241,7 @@ static void eb_destroy(struct eb_vmas *eb)

  static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
  {
-	return (HAS_LLC(obj->base.dev) ||
+	return (HAS_LLC(obj) ||
  		obj->base.write_domain == I915_GEM_DOMAIN_CPU ||
  		obj->cache_level != I915_CACHE_NONE);
  }
@@ -312,8 +312,7 @@ relocate_entry_gtt(struct drm_i915_gem_object *obj,
  		   struct drm_i915_gem_relocation_entry *reloc,
  		   uint64_t target_offset)
  {
-	struct drm_device *dev = obj->base.dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_private *dev_priv = to_i915(obj);
  	uint64_t delta = relocation_target(reloc, target_offset);
  	uint64_t offset;
  	void __iomem *reloc_page;
@@ -334,7 +333,7 @@ relocate_entry_gtt(struct drm_i915_gem_object *obj,
  					      offset & PAGE_MASK);
  	iowrite32(lower_32_bits(delta), reloc_page + offset_in_page(offset));

-	if (INTEL_INFO(dev)->gen >= 8) {
+	if (INTEL_INFO(obj)->gen >= 8) {
  		offset += sizeof(uint32_t);

  		if (offset_in_page(offset) == 0) {
@@ -367,7 +366,6 @@ relocate_entry_clflush(struct drm_i915_gem_object *obj,
  		       struct drm_i915_gem_relocation_entry *reloc,
  		       uint64_t target_offset)
  {
-	struct drm_device *dev = obj->base.dev;
  	uint32_t page_offset = offset_in_page(reloc->offset);
  	uint64_t delta = relocation_target(reloc, target_offset);
  	char *vaddr;
@@ -381,7 +379,7 @@ relocate_entry_clflush(struct drm_i915_gem_object *obj,
  				reloc->offset >> PAGE_SHIFT));
  	clflush_write32(vaddr + page_offset, lower_32_bits(delta));

-	if (INTEL_INFO(dev)->gen >= 8) {
+	if (INTEL_INFO(obj)->gen >= 8) {
  		page_offset = offset_in_page(page_offset + sizeof(uint32_t));

  		if (page_offset == 0) {
@@ -403,7 +401,6 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
  				   struct eb_vmas *eb,
  				   struct drm_i915_gem_relocation_entry *reloc)
  {
-	struct drm_device *dev = obj->base.dev;
  	struct drm_gem_object *target_obj;
  	struct drm_i915_gem_object *target_i915_obj;
  	struct i915_vma *target_vma;
@@ -422,7 +419,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,
  	/* Sandybridge PPGTT errata: We need a global gtt mapping for MI and
  	 * pipe_control writes because the gpu doesn't properly redirect them
  	 * through the ppgtt for non_secure batchbuffers. */
-	if (unlikely(IS_GEN6(dev) &&
+	if (unlikely(IS_GEN6(obj) &&
  	    reloc->write_domain == I915_GEM_DOMAIN_INSTRUCTION)) {
  		ret = i915_vma_bind(target_vma, target_i915_obj->cache_level,
  				    PIN_GLOBAL);
@@ -464,7 +461,7 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj,

  	/* Check that the relocation address is valid... */
  	if (unlikely(reloc->offset >
-		obj->base.size - (INTEL_INFO(dev)->gen >= 8 ? 8 : 4))) {
+		obj->base.size - (INTEL_INFO(obj)->gen >= 8 ? 8 : 4))) {
  		DRM_DEBUG("Relocation beyond object bounds: "
  			  "obj %p target %d offset %d size %d.\n",
  			  obj, reloc->target_handle,
@@ -672,7 +669,7 @@ need_reloc_mappable(struct i915_vma *vma)
  		return false;

  	/* See also use_cpu_reloc() */
-	if (HAS_LLC(vma->obj->base.dev))
+	if (HAS_LLC(vma->obj))

Things like HAS_LLC(obj) and HAS_LLC(engine) are IMHO illogical and non-intuitive.

to_i915(various) makes sense, because any i915 object is exactly that - an i915 object. for_each_engine is also OK. But going further than that is not desirable.

Regards,

Tvrtko
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