drm/i915: Make a single set-to-cpu-domain path and use it wherever needed. (e47c68e9) · Commits · EulixOS / Software / Kernel

drivers/gpu/drm/i915/i915_drv.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -379,8 +379,8 @@ struct drm_i915_gem_object {
		uint32_t agp_type;

		/**
		* Flagging of which individual pages are valid in GEM_DOMAIN_CPU when
		* GEM_DOMAIN_CPU is not in the object's read domain.
		* If present, while GEM_DOMAIN_CPU is in the read domain this array
		* flags which individual pages are valid.
		*/
		uint8_t *page_cpu_valid;
		};

drivers/gpu/drm/i915/i915_gem.c

+213 −150

Original line number	Diff line number	Diff line
		@@ -37,19 +37,17 @@ static int
		i915_gem_object_set_domain(struct drm_gem_object *obj,
		uint32_t read_domains,
		uint32_t write_domain);
		static int
		i915_gem_object_set_domain_range(struct drm_gem_object *obj,
		uint64_t offset,
		uint64_t size,
		uint32_t read_domains,
		uint32_t write_domain);
		static int
		i915_gem_set_domain(struct drm_gem_object *obj,
		struct drm_file *file_priv,
		uint32_t read_domains,
		uint32_t write_domain);
		static void i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj);
		static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj);
		static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj);
		static int i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj,
		int write);
		static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj,
		int write);
		static int i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj,
		uint64_t offset,
		uint64_t size);
		static void i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj);
		static int i915_gem_object_get_page_list(struct drm_gem_object *obj);
		static void i915_gem_object_free_page_list(struct drm_gem_object *obj);
		static int i915_gem_object_wait_rendering(struct drm_gem_object *obj);
		@@ -164,8 +162,8 @@ i915_gem_pread_ioctl(struct drm_device dev, void data,

		mutex_lock(&dev->struct_mutex);

		ret = i915_gem_object_set_domain_range(obj, args->offset, args->size,
		I915_GEM_DOMAIN_CPU, 0);
		ret = i915_gem_object_set_cpu_read_domain_range(obj, args->offset,
		args->size);
		if (ret != 0) {
		drm_gem_object_unreference(obj);
		mutex_unlock(&dev->struct_mutex);
		@@ -321,8 +319,7 @@ i915_gem_shmem_pwrite(struct drm_device dev, struct drm_gem_object obj,

		mutex_lock(&dev->struct_mutex);

		ret = i915_gem_set_domain(obj, file_priv,
		I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
		ret = i915_gem_object_set_to_cpu_domain(obj, 1);
		if (ret) {
		mutex_unlock(&dev->struct_mutex);
		return ret;
		@@ -439,8 +436,7 @@ i915_gem_set_domain_ioctl(struct drm_device dev, void data,
		if (read_domains & I915_GEM_DOMAIN_GTT) {
		ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
		} else {
		ret = i915_gem_set_domain(obj, file_priv,
		read_domains, write_domain);
		ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0);
		}

		drm_gem_object_unreference(obj);
		@@ -477,10 +473,9 @@ i915_gem_sw_finish_ioctl(struct drm_device dev, void data,
		obj_priv = obj->driver_private;

		/* Pinned buffers may be scanout, so flush the cache */
		if ((obj->write_domain & I915_GEM_DOMAIN_CPU) && obj_priv->pin_count) {
		i915_gem_clflush_object(obj);
		drm_agp_chipset_flush(dev);
		}
		if (obj_priv->pin_count)
		i915_gem_object_flush_cpu_write_domain(obj);

		drm_gem_object_unreference(obj);
		mutex_unlock(&dev->struct_mutex);
		return ret;
		@@ -925,23 +920,10 @@ i915_gem_object_wait_rendering(struct drm_gem_object *obj)
		struct drm_i915_gem_object *obj_priv = obj->driver_private;
		int ret;

		/* If there are writes queued to the buffer, flush and
		* create a new seqno to wait for.
		/* This function only exists to support waiting for existing rendering,
		* not for emitting required flushes.
		*/
		if (obj->write_domain & ~(I915_GEM_DOMAIN_CPU\|I915_GEM_DOMAIN_GTT)) {
		uint32_t seqno, write_domain = obj->write_domain;
		#if WATCH_BUF
		DRM_INFO("%s: flushing object %p from write domain %08x\n",
		__func__, obj, write_domain);
		#endif
		i915_gem_flush(dev, 0, write_domain);

		seqno = i915_add_request(dev, write_domain);
		i915_gem_object_move_to_active(obj, seqno);
		#if WATCH_LRU
		DRM_INFO("%s: flush moves to exec list %p\n", __func__, obj);
		#endif
		}
		BUG_ON((obj->write_domain & I915_GEM_GPU_DOMAINS) != 0);

		/* If there is rendering queued on the buffer being evicted, wait for
		* it.
		@@ -981,23 +963,15 @@ i915_gem_object_unbind(struct drm_gem_object *obj)
		return -EINVAL;
		}

		/* Wait for any rendering to complete
		*/
		ret = i915_gem_object_wait_rendering(obj);
		if (ret) {
		DRM_ERROR("wait_rendering failed: %d\n", ret);
		return ret;
		}

		/* Move the object to the CPU domain to ensure that
		* any possible CPU writes while it's not in the GTT
		* are flushed when we go to remap it. This will
		* also ensure that all pending GPU writes are finished
		* before we unbind.
		*/
		ret = i915_gem_object_set_domain(obj, I915_GEM_DOMAIN_CPU,
		I915_GEM_DOMAIN_CPU);
		ret = i915_gem_object_set_to_cpu_domain(obj, 1);
		if (ret) {
		if (ret != -ERESTARTSYS)
		DRM_ERROR("set_domain failed: %d\n", ret);
		return ret;
		}
		@@ -1259,6 +1233,51 @@ i915_gem_clflush_object(struct drm_gem_object *obj)
		drm_clflush_pages(obj_priv->page_list, obj->size / PAGE_SIZE);
		}

		/** Flushes any GPU write domain for the object if it's dirty. */
		static void
		i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj)
		{
		struct drm_device *dev = obj->dev;
		uint32_t seqno;

		if ((obj->write_domain & I915_GEM_GPU_DOMAINS) == 0)
		return;

		/* Queue the GPU write cache flushing we need. */
		i915_gem_flush(dev, 0, obj->write_domain);
		seqno = i915_add_request(dev, obj->write_domain);
		obj->write_domain = 0;
		i915_gem_object_move_to_active(obj, seqno);
		}

		/** Flushes the GTT write domain for the object if it's dirty. */
		static void
		i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj)
		{
		if (obj->write_domain != I915_GEM_DOMAIN_GTT)
		return;

		/* No actual flushing is required for the GTT write domain. Writes
		* to it immediately go to main memory as far as we know, so there's
		* no chipset flush. It also doesn't land in render cache.
		*/
		obj->write_domain = 0;
		}

		/** Flushes the CPU write domain for the object if it's dirty. */
		static void
		i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj)
		{
		struct drm_device *dev = obj->dev;

		if (obj->write_domain != I915_GEM_DOMAIN_CPU)
		return;

		i915_gem_clflush_object(obj);
		drm_agp_chipset_flush(dev);
		obj->write_domain = 0;
		}

		/**
		* Moves a single object to the GTT read, and possibly write domain.
		*
		@@ -1268,56 +1287,81 @@ i915_gem_clflush_object(struct drm_gem_object *obj)
		static int
		i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write)
		{
		struct drm_device *dev = obj->dev;
		struct drm_i915_gem_object *obj_priv = obj->driver_private;
		uint32_t flush_domains;
		int ret;

		/* Figure out what GPU domains we need to flush or invalidate for
		* moving to GTT.
		i915_gem_object_flush_gpu_write_domain(obj);
		/* Wait on any GPU rendering and flushing to occur. */
		ret = i915_gem_object_wait_rendering(obj);
		if (ret != 0)
		return ret;

		/* If we're writing through the GTT domain, then CPU and GPU caches
		* will need to be invalidated at next use.
		*/
		flush_domains = obj->write_domain & I915_GEM_GPU_DOMAINS;
		if (write)
		obj->read_domains &= I915_GEM_DOMAIN_GTT;

		/* Queue the GPU write cache flushing we need. */
		if (flush_domains != 0) {
		uint32_t seqno;
		i915_gem_object_flush_cpu_write_domain(obj);

		obj->write_domain &= ~I915_GEM_GPU_DOMAINS;
		i915_gem_flush(dev, 0, flush_domains);
		seqno = i915_add_request(dev, flush_domains);
		i915_gem_object_move_to_active(obj, seqno);
		/* It should now be out of any other write domains, and we can update
		* the domain values for our changes.
		*/
		BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
		obj->read_domains \|= I915_GEM_DOMAIN_GTT;
		if (write) {
		obj->write_domain = I915_GEM_DOMAIN_GTT;
		obj_priv->dirty = 1;
		}

		/* Wait on any GPU rendering and flushing to occur. */
		if (obj_priv->active) {
		return 0;
		}

		/**
		* Moves a single object to the CPU read, and possibly write domain.
		*
		* This function returns when the move is complete, including waiting on
		* flushes to occur.
		*/
		static int
		i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write)
		{
		struct drm_device *dev = obj->dev;
		int ret;

		ret = i915_wait_request(dev, obj_priv->last_rendering_seqno);
		i915_gem_object_flush_gpu_write_domain(obj);
		/* Wait on any GPU rendering and flushing to occur. */
		ret = i915_gem_object_wait_rendering(obj);
		if (ret != 0)
		return ret;
		}

		/* If we're writing through the GTT domain, then CPU and GPU caches
		* will need to be invalidated at next use.
		i915_gem_object_flush_gtt_write_domain(obj);

		/* If we have a partially-valid cache of the object in the CPU,
		* finish invalidating it and free the per-page flags.
		*/
		if (write)
		obj->read_domains &= ~(I915_GEM_GPU_DOMAINS \|
		I915_GEM_DOMAIN_CPU);
		i915_gem_object_set_to_full_cpu_read_domain(obj);

		/* Flush the CPU domain if it's dirty. */
		if (obj->write_domain & I915_GEM_DOMAIN_CPU) {
		/* Flush the CPU cache if it's still invalid. */
		if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0) {
		i915_gem_clflush_object(obj);
		drm_agp_chipset_flush(dev);

		obj->write_domain &= ~I915_GEM_DOMAIN_CPU;
		obj->read_domains \|= I915_GEM_DOMAIN_CPU;
		}

		/* It should now be out of any other write domains, and we can update
		* the domain values for our changes.
		*/
		BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
		obj->read_domains \|= I915_GEM_DOMAIN_GTT;
		if (write)
		obj->write_domain = I915_GEM_DOMAIN_GTT;
		BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0);

		/* If we're writing through the CPU, then the GPU read domains will
		* need to be invalidated at next use.
		*/
		if (write) {
		obj->read_domains &= I915_GEM_DOMAIN_CPU;
		obj->write_domain = I915_GEM_DOMAIN_CPU;
		}

		return 0;
		}
		@@ -1442,7 +1486,9 @@ i915_gem_object_set_domain(struct drm_gem_object *obj,
		struct drm_i915_gem_object *obj_priv = obj->driver_private;
		uint32_t invalidate_domains = 0;
		uint32_t flush_domains = 0;
		int ret;

		BUG_ON(read_domains & I915_GEM_DOMAIN_CPU);
		BUG_ON(write_domain == I915_GEM_DOMAIN_CPU);

		#if WATCH_BUF
		DRM_INFO("%s: object %p read %08x -> %08x write %08x -> %08x\n",
		@@ -1479,34 +1525,11 @@ i915_gem_object_set_domain(struct drm_gem_object *obj,
		DRM_INFO("%s: CPU domain flush %08x invalidate %08x\n",
		__func__, flush_domains, invalidate_domains);
		#endif
		/*
		* If we're invaliding the CPU cache and flushing a GPU cache,
		* then pause for rendering so that the GPU caches will be
		* flushed before the cpu cache is invalidated
		*/
		if ((invalidate_domains & I915_GEM_DOMAIN_CPU) &&
		(flush_domains & ~(I915_GEM_DOMAIN_CPU \|
		I915_GEM_DOMAIN_GTT))) {
		ret = i915_gem_object_wait_rendering(obj);
		if (ret)
		return ret;
		}
		i915_gem_clflush_object(obj);
		}

		if ((write_domain \| flush_domains) != 0)
		obj->write_domain = write_domain;

		/* If we're invalidating the CPU domain, clear the per-page CPU
		* domain list as well.
		*/
		if (obj_priv->page_cpu_valid != NULL &&
		(write_domain != 0 \|\|
		read_domains & I915_GEM_DOMAIN_CPU)) {
		drm_free(obj_priv->page_cpu_valid, obj->size / PAGE_SIZE,
		DRM_MEM_DRIVER);
		obj_priv->page_cpu_valid = NULL;
		}
		obj->read_domains = read_domains;

		dev->invalidate_domains \|= invalidate_domains;
		@@ -1521,43 +1544,91 @@ i915_gem_object_set_domain(struct drm_gem_object *obj,
		}

		/**
		* Set the read/write domain on a range of the object.
		* Moves the object from a partially CPU read to a full one.
		*
		* Currently only implemented for CPU reads, otherwise drops to normal
		* i915_gem_object_set_domain().
		* Note that this only resolves i915_gem_object_set_cpu_read_domain_range(),
		* and doesn't handle transitioning from !(read_domains & I915_GEM_DOMAIN_CPU).
		*/
		static int
		i915_gem_object_set_domain_range(struct drm_gem_object *obj,
		uint64_t offset,
		uint64_t size,
		uint32_t read_domains,
		uint32_t write_domain)
		static void
		i915_gem_object_set_to_full_cpu_read_domain(struct drm_gem_object *obj)
		{
		struct drm_device *dev = obj->dev;
		struct drm_i915_gem_object *obj_priv = obj->driver_private;
		int ret, i;

		if (obj->read_domains & I915_GEM_DOMAIN_CPU)
		return 0;
		if (!obj_priv->page_cpu_valid)
		return;

		if (read_domains != I915_GEM_DOMAIN_CPU \|\|
		write_domain != 0)
		return i915_gem_object_set_domain(obj,
		read_domains, write_domain);
		/* If we're partially in the CPU read domain, finish moving it in.
		*/
		if (obj->read_domains & I915_GEM_DOMAIN_CPU) {
		int i;

		/* Wait on any GPU rendering to the object to be flushed. */
		for (i = 0; i <= (obj->size - 1) / PAGE_SIZE; i++) {
		if (obj_priv->page_cpu_valid[i])
		continue;
		drm_clflush_pages(obj_priv->page_list + i, 1);
		}
		drm_agp_chipset_flush(dev);
		}

		/* Free the page_cpu_valid mappings which are now stale, whether
		* or not we've got I915_GEM_DOMAIN_CPU.
		*/
		drm_free(obj_priv->page_cpu_valid, obj->size / PAGE_SIZE,
		DRM_MEM_DRIVER);
		obj_priv->page_cpu_valid = NULL;
		}

		/**
		* Set the CPU read domain on a range of the object.
		*
		* The object ends up with I915_GEM_DOMAIN_CPU in its read flags although it's
		* not entirely valid. The page_cpu_valid member of the object flags which
		* pages have been flushed, and will be respected by
		* i915_gem_object_set_to_cpu_domain() if it's called on to get a valid mapping
		* of the whole object.
		*
		* This function returns when the move is complete, including waiting on
		* flushes to occur.
		*/
		static int
		i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj,
		uint64_t offset, uint64_t size)
		{
		struct drm_i915_gem_object *obj_priv = obj->driver_private;
		int i, ret;

		if (offset == 0 && size == obj->size)
		return i915_gem_object_set_to_cpu_domain(obj, 0);

		i915_gem_object_flush_gpu_write_domain(obj);
		/* Wait on any GPU rendering and flushing to occur. */
		ret = i915_gem_object_wait_rendering(obj);
		if (ret)
		if (ret != 0)
		return ret;
		i915_gem_object_flush_gtt_write_domain(obj);

		/* If we're already fully in the CPU read domain, we're done. */
		if (obj_priv->page_cpu_valid == NULL &&
		(obj->read_domains & I915_GEM_DOMAIN_CPU) != 0)
		return 0;

		/* Otherwise, create/clear the per-page CPU read domain flag if we're
		* newly adding I915_GEM_DOMAIN_CPU
		*/
		if (obj_priv->page_cpu_valid == NULL) {
		obj_priv->page_cpu_valid = drm_calloc(1, obj->size / PAGE_SIZE,
		DRM_MEM_DRIVER);
		}
		if (obj_priv->page_cpu_valid == NULL)
		return -ENOMEM;
		} else if ((obj->read_domains & I915_GEM_DOMAIN_CPU) == 0)
		memset(obj_priv->page_cpu_valid, 0, obj->size / PAGE_SIZE);

		/* Flush the cache on any pages that are still invalid from the CPU's
		* perspective.
		*/
		for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE; i++) {
		for (i = offset / PAGE_SIZE; i <= (offset + size - 1) / PAGE_SIZE;
		i++) {
		if (obj_priv->page_cpu_valid[i])
		continue;

		@@ -1566,6 +1637,13 @@ i915_gem_object_set_domain_range(struct drm_gem_object *obj,
		obj_priv->page_cpu_valid[i] = 1;
		}

		/* It should now be out of any other write domains, and we can update
		* the domain values for our changes.
		*/
		BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_CPU) != 0);

		obj->read_domains \|= I915_GEM_DOMAIN_CPU;

		return 0;
		}

		@@ -1679,6 +1757,18 @@ i915_gem_object_pin_and_relocate(struct drm_gem_object *obj,
		return -EINVAL;
		}

		if (reloc.write_domain & I915_GEM_DOMAIN_CPU \|\|
		reloc.read_domains & I915_GEM_DOMAIN_CPU) {
		DRM_ERROR("reloc with read/write CPU domains: "
		"obj %p target %d offset %d "
		"read %08x write %08x",
		obj, reloc.target_handle,
		(int) reloc.offset,
		reloc.read_domains,
		reloc.write_domain);
		return -EINVAL;
		}

		if (reloc.write_domain && target_obj->pending_write_domain &&
		reloc.write_domain != target_obj->pending_write_domain) {
		DRM_ERROR("Write domain conflict: "
		@@ -2157,11 +2247,7 @@ i915_gem_pin_ioctl(struct drm_device dev, void data,
		/* XXX - flush the CPU caches for pinned objects
		* as the X server doesn't manage domains yet
		*/
		if (obj->write_domain & I915_GEM_DOMAIN_CPU) {
		i915_gem_clflush_object(obj);
		drm_agp_chipset_flush(dev);
		obj->write_domain = 0;
		}
		i915_gem_object_flush_cpu_write_domain(obj);
		args->offset = obj_priv->gtt_offset;
		drm_gem_object_unreference(obj);
		mutex_unlock(&dev->struct_mutex);
		@@ -2263,29 +2349,6 @@ void i915_gem_free_object(struct drm_gem_object *obj)
		drm_free(obj->driver_private, 1, DRM_MEM_DRIVER);
		}

		static int
		i915_gem_set_domain(struct drm_gem_object *obj,
		struct drm_file *file_priv,
		uint32_t read_domains,
		uint32_t write_domain)
		{
		struct drm_device *dev = obj->dev;
		int ret;
		uint32_t flush_domains;

		BUG_ON(!mutex_is_locked(&dev->struct_mutex));

		ret = i915_gem_object_set_domain(obj, read_domains, write_domain);
		if (ret)
		return ret;
		flush_domains = i915_gem_dev_set_domain(obj->dev);

		if (flush_domains & ~(I915_GEM_DOMAIN_CPU\|I915_GEM_DOMAIN_GTT))
		(void) i915_add_request(dev, flush_domains);

		return 0;
		}

		/** Unbinds all objects that are on the given buffer list. */
		static int
		i915_gem_evict_from_list(struct drm_device dev, struct list_head head)