linux-core/i915_buffer.c - platform/external/libdrm - Gitiles

 /**************************************************************************
  *
  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sub license, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
  *
  *
  **************************************************************************/
 /*
  * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  */

 #include "drmP.h"
 #include "i915_drm.h"
 #include "i915_drv.h"

 struct drm_ttm_backend *i915_create_ttm_backend_entry(struct drm_device * dev)
 {
 	return drm_agp_init_ttm(dev);
 }

 int i915_fence_types(struct drm_buffer_object *bo, uint32_t * type)
 {
 	if (bo->mem.flags & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
 		*type = 3;
 	else
 		*type = 1;
 	return 0;
 }

 int i915_invalidate_caches(struct drm_device * dev, uint64_t flags)
 {
 	/*
 	 * FIXME: Only emit once per batchbuffer submission.
 	 */

 	uint32_t flush_cmd = MI_NO_WRITE_FLUSH;

 	if (flags & DRM_BO_FLAG_READ)
 		flush_cmd |= MI_READ_FLUSH;
 	if (flags & DRM_BO_FLAG_EXE)
 		flush_cmd |= MI_EXE_FLUSH;

 	return i915_emit_mi_flush(dev, flush_cmd);
 }

 int i915_init_mem_type(struct drm_device * dev, uint32_t type,
 		       struct drm_mem_type_manager * man)
 {
 	switch (type) {
 	case DRM_BO_MEM_LOCAL:
 		man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
 		    _DRM_FLAG_MEMTYPE_CACHED;
 		man->drm_bus_maptype = 0;
 		break;
 	case DRM_BO_MEM_TT:
 		if (!(drm_core_has_AGP(dev) && dev->agp)) {
 			DRM_ERROR("AGP is not enabled for memory type %u\n",
 				  (unsigned)type);
 			return -EINVAL;
 		}
 		man->io_offset = dev->agp->agp_info.aper_base;
 		man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
 		man->io_addr = NULL;
 		man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
 		    _DRM_FLAG_MEMTYPE_CSELECT | _DRM_FLAG_NEEDS_IOREMAP;
 		man->drm_bus_maptype = _DRM_AGP;
 		break;
 	case DRM_BO_MEM_PRIV0:
 		if (!(drm_core_has_AGP(dev) && dev->agp)) {
 			DRM_ERROR("AGP is not enabled for memory type %u\n",
 				  (unsigned)type);
 			return -EINVAL;
 		}
 		man->io_offset = dev->agp->agp_info.aper_base;
 		man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
 		man->io_addr = NULL;
 		man->flags =  _DRM_FLAG_MEMTYPE_MAPPABLE |
 		    _DRM_FLAG_MEMTYPE_FIXED | _DRM_FLAG_NEEDS_IOREMAP;
 		man->drm_bus_maptype = _DRM_AGP;
 		break;
 	default:
 		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 		return -EINVAL;
 	}
 	return 0;
 }

 uint32_t i915_evict_mask(struct drm_buffer_object *bo)
 {
 	switch (bo->mem.mem_type) {
 	case DRM_BO_MEM_LOCAL:
 	case DRM_BO_MEM_TT:
 		return DRM_BO_FLAG_MEM_LOCAL;
 	default:
 		return DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_CACHED;
 	}
 }

 static void i915_emit_copy_blit(struct drm_device * dev,
 				uint32_t src_offset,
 				uint32_t dst_offset,
 				uint32_t pages, int direction)
 {
 	uint32_t cur_pages;
 	uint32_t stride = PAGE_SIZE;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	RING_LOCALS;

 	if (!dev_priv)
 		return;

 	i915_kernel_lost_context(dev);
 	while (pages > 0) {
 		cur_pages = pages;
 		if (cur_pages > 2048)
 			cur_pages = 2048;
 		pages -= cur_pages;

 		BEGIN_LP_RING(6);
 		OUT_RING(SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 			 XY_SRC_COPY_BLT_WRITE_RGB);
 		OUT_RING((stride & 0xffff) | (0xcc << 16) | (1 << 24) |
 			 (1 << 25) | (direction ? (1 << 30) : 0));
 		OUT_RING((cur_pages << 16) | PAGE_SIZE);
 		OUT_RING(dst_offset);
 		OUT_RING(stride & 0xffff);
 		OUT_RING(src_offset);
 		ADVANCE_LP_RING();
 	}
 	return;
 }

 static int i915_move_blit(struct drm_buffer_object * bo,
 			  int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 {
 	struct drm_bo_mem_reg *old_mem = &bo->mem;
 	int dir = 0;

 	if ((old_mem->mem_type == new_mem->mem_type) &&
 	    (new_mem->mm_node->start <
 	     old_mem->mm_node->start + old_mem->mm_node->size)) {
 		dir = 1;
 	}

 	i915_emit_copy_blit(bo->dev,
 			    old_mem->mm_node->start << PAGE_SHIFT,
 			    new_mem->mm_node->start << PAGE_SHIFT,
 			    new_mem->num_pages, dir);

 	i915_emit_mi_flush(bo->dev, MI_READ_FLUSH | MI_EXE_FLUSH);

 	return drm_bo_move_accel_cleanup(bo, evict, no_wait, 0,
 					 DRM_FENCE_TYPE_EXE |
 					 DRM_I915_FENCE_TYPE_RW,
 					 DRM_I915_FENCE_FLAG_FLUSHED, new_mem);
 }

 /*
  * Flip destination ttm into cached-coherent AGP,
  * then blit and subsequently move out again.
  */

 static int i915_move_flip(struct drm_buffer_object * bo,
 			  int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 {
 	struct drm_device *dev = bo->dev;
 	struct drm_bo_mem_reg tmp_mem;
 	int ret;

 	tmp_mem = *new_mem;
 	tmp_mem.mm_node = NULL;
 	tmp_mem.mask = DRM_BO_FLAG_MEM_TT |
 	    DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING;

 	ret = drm_bo_mem_space(bo, &tmp_mem, no_wait);
 	if (ret)
 		return ret;

 	ret = drm_bind_ttm(bo->ttm, 1, tmp_mem.mm_node->start);
 	if (ret)
 		goto out_cleanup;

 	ret = i915_move_blit(bo, 1, no_wait, &tmp_mem);
 	if (ret)
 		goto out_cleanup;

 	ret = drm_bo_move_ttm(bo, evict, no_wait, new_mem);
 out_cleanup:
 	if (tmp_mem.mm_node) {
 		mutex_lock(&dev->struct_mutex);
 		if (tmp_mem.mm_node != bo->pinned_node)
 			drm_mm_put_block(tmp_mem.mm_node);
 		tmp_mem.mm_node = NULL;
 		mutex_unlock(&dev->struct_mutex);
 	}
 	return ret;
 }

 int i915_move(struct drm_buffer_object * bo,
 	      int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 {
 	struct drm_bo_mem_reg *old_mem = &bo->mem;

 	if (old_mem->mem_type == DRM_BO_MEM_LOCAL) {
 		return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 	} else if (new_mem->mem_type == DRM_BO_MEM_LOCAL) {
 		if (i915_move_flip(bo, evict, no_wait, new_mem))
 			return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 	} else {
 		if (i915_move_blit(bo, evict, no_wait, new_mem))
 			return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 	}
 	return 0;
 }
	/**************************************************************************
	*
	* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
	* All Rights Reserved.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sub license, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	*
	* The above copyright notice and this permission notice (including the
	* next paragraph) shall be included in all copies or substantial portions
	* of the Software.
	*
	*
	**************************************************************************/
	/*
	* Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
	*/

	#include "drmP.h"
	#include "i915_drm.h"
	#include "i915_drv.h"

	struct drm_ttm_backend i915_create_ttm_backend_entry(struct drm_device dev)
	{
	return drm_agp_init_ttm(dev);
	}

	int i915_fence_types(struct drm_buffer_object bo, uint32_t type)
	{
	if (bo->mem.flags & (DRM_BO_FLAG_READ \| DRM_BO_FLAG_WRITE))
	*type = 3;
	else
	*type = 1;
	return 0;
	}

	int i915_invalidate_caches(struct drm_device * dev, uint64_t flags)
	{
	/*
	* FIXME: Only emit once per batchbuffer submission.
	*/

	uint32_t flush_cmd = MI_NO_WRITE_FLUSH;

	if (flags & DRM_BO_FLAG_READ)
	flush_cmd \|= MI_READ_FLUSH;
	if (flags & DRM_BO_FLAG_EXE)
	flush_cmd \|= MI_EXE_FLUSH;

	return i915_emit_mi_flush(dev, flush_cmd);
	}

	int i915_init_mem_type(struct drm_device * dev, uint32_t type,
	struct drm_mem_type_manager * man)
	{
	switch (type) {
	case DRM_BO_MEM_LOCAL:
	man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE \|
	_DRM_FLAG_MEMTYPE_CACHED;
	man->drm_bus_maptype = 0;
	break;
	case DRM_BO_MEM_TT:
	if (!(drm_core_has_AGP(dev) && dev->agp)) {
	DRM_ERROR("AGP is not enabled for memory type %u\n",
	(unsigned)type);
	return -EINVAL;
	}
	man->io_offset = dev->agp->agp_info.aper_base;
	man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
	man->io_addr = NULL;
	man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE \|
	_DRM_FLAG_MEMTYPE_CSELECT \| _DRM_FLAG_NEEDS_IOREMAP;
	man->drm_bus_maptype = _DRM_AGP;
	break;
	case DRM_BO_MEM_PRIV0:
	if (!(drm_core_has_AGP(dev) && dev->agp)) {
	DRM_ERROR("AGP is not enabled for memory type %u\n",
	(unsigned)type);
	return -EINVAL;
	}
	man->io_offset = dev->agp->agp_info.aper_base;
	man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
	man->io_addr = NULL;
	man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE \|
	_DRM_FLAG_MEMTYPE_FIXED \| _DRM_FLAG_NEEDS_IOREMAP;
	man->drm_bus_maptype = _DRM_AGP;
	break;
	default:
	DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
	return -EINVAL;
	}
	return 0;
	}

	uint32_t i915_evict_mask(struct drm_buffer_object *bo)
	{
	switch (bo->mem.mem_type) {
	case DRM_BO_MEM_LOCAL:
	case DRM_BO_MEM_TT:
	return DRM_BO_FLAG_MEM_LOCAL;
	default:
	return DRM_BO_FLAG_MEM_TT \| DRM_BO_FLAG_CACHED;
	}
	}

	static void i915_emit_copy_blit(struct drm_device * dev,
	uint32_t src_offset,
	uint32_t dst_offset,
	uint32_t pages, int direction)
	{
	uint32_t cur_pages;
	uint32_t stride = PAGE_SIZE;
	drm_i915_private_t *dev_priv = dev->dev_private;
	RING_LOCALS;

	if (!dev_priv)
	return;

	i915_kernel_lost_context(dev);
	while (pages > 0) {
	cur_pages = pages;
	if (cur_pages > 2048)
	cur_pages = 2048;
	pages -= cur_pages;

	BEGIN_LP_RING(6);
	OUT_RING(SRC_COPY_BLT_CMD \| XY_SRC_COPY_BLT_WRITE_ALPHA \|
	XY_SRC_COPY_BLT_WRITE_RGB);
	OUT_RING((stride & 0xffff) \| (0xcc << 16) \| (1 << 24) \|
	(1 << 25) \| (direction ? (1 << 30) : 0));
	OUT_RING((cur_pages << 16) \| PAGE_SIZE);
	OUT_RING(dst_offset);
	OUT_RING(stride & 0xffff);
	OUT_RING(src_offset);
	ADVANCE_LP_RING();
	}
	return;
	}

	static int i915_move_blit(struct drm_buffer_object * bo,
	int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
	{
	struct drm_bo_mem_reg *old_mem = &bo->mem;
	int dir = 0;

	if ((old_mem->mem_type == new_mem->mem_type) &&
	(new_mem->mm_node->start <
	old_mem->mm_node->start + old_mem->mm_node->size)) {
	dir = 1;
	}

	i915_emit_copy_blit(bo->dev,
	old_mem->mm_node->start << PAGE_SHIFT,
	new_mem->mm_node->start << PAGE_SHIFT,
	new_mem->num_pages, dir);

	i915_emit_mi_flush(bo->dev, MI_READ_FLUSH \| MI_EXE_FLUSH);

	return drm_bo_move_accel_cleanup(bo, evict, no_wait, 0,
	DRM_FENCE_TYPE_EXE \|
	DRM_I915_FENCE_TYPE_RW,
	DRM_I915_FENCE_FLAG_FLUSHED, new_mem);
	}

	/*
	* Flip destination ttm into cached-coherent AGP,
	* then blit and subsequently move out again.
	*/

	static int i915_move_flip(struct drm_buffer_object * bo,
	int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
	{
	struct drm_device *dev = bo->dev;
	struct drm_bo_mem_reg tmp_mem;
	int ret;

	tmp_mem = *new_mem;
	tmp_mem.mm_node = NULL;
	tmp_mem.mask = DRM_BO_FLAG_MEM_TT \|
	DRM_BO_FLAG_CACHED \| DRM_BO_FLAG_FORCE_CACHING;

	ret = drm_bo_mem_space(bo, &tmp_mem, no_wait);
	if (ret)
	return ret;

	ret = drm_bind_ttm(bo->ttm, 1, tmp_mem.mm_node->start);
	if (ret)
	goto out_cleanup;

	ret = i915_move_blit(bo, 1, no_wait, &tmp_mem);
	if (ret)
	goto out_cleanup;

	ret = drm_bo_move_ttm(bo, evict, no_wait, new_mem);
	out_cleanup:
	if (tmp_mem.mm_node) {
	mutex_lock(&dev->struct_mutex);
	if (tmp_mem.mm_node != bo->pinned_node)
	drm_mm_put_block(tmp_mem.mm_node);
	tmp_mem.mm_node = NULL;
	mutex_unlock(&dev->struct_mutex);
	}
	return ret;
	}

	int i915_move(struct drm_buffer_object * bo,
	int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
	{
	struct drm_bo_mem_reg *old_mem = &bo->mem;

	if (old_mem->mem_type == DRM_BO_MEM_LOCAL) {
	return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
	} else if (new_mem->mem_type == DRM_BO_MEM_LOCAL) {
	if (i915_move_flip(bo, evict, no_wait, new_mem))
	return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
	} else {
	if (i915_move_blit(bo, evict, no_wait, new_mem))
	return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
	}
	return 0;
	}