drivers/gpu/drm/qxl/qxl_ttm.c - linux - Git at Google

 /*
  * Copyright 2013 Red Hat Inc.
  *
  * 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, sublicense,
  * 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 above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
  *
  * Authors: Dave Airlie
  *          Alon Levy
  */

 #include <linux/delay.h>

 #include <drm/drm.h>
 #include <drm/drm_file.h>
 #include <drm/drm_debugfs.h>
 #include <drm/qxl_drm.h>
 #include <drm/ttm/ttm_bo.h>
 #include <drm/ttm/ttm_placement.h>
 #include <drm/ttm/ttm_range_manager.h>
 #include <drm/ttm/ttm_tt.h>

 #include "qxl_drv.h"
 #include "qxl_object.h"

 static struct qxl_device *qxl_get_qdev(struct ttm_device *bdev)
 {
 	struct qxl_mman *mman;
 	struct qxl_device *qdev;

 	mman = container_of(bdev, struct qxl_mman, bdev);
 	qdev = container_of(mman, struct qxl_device, mman);
 	return qdev;
 }

 static void qxl_evict_flags(struct ttm_buffer_object *bo,
 				struct ttm_placement *placement)
 {
 	struct qxl_bo *qbo;
 	static const struct ttm_place placements = {
 		.fpfn = 0,
 		.lpfn = 0,
 		.mem_type = TTM_PL_SYSTEM,
 		.flags = 0
 	};

 	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
 		placement->placement = &placements;
 		placement->busy_placement = &placements;
 		placement->num_placement = 1;
 		placement->num_busy_placement = 1;
 		return;
 	}
 	qbo = to_qxl_bo(bo);
 	qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
 	*placement = qbo->placement;
 }

 int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
 			   struct ttm_resource *mem)
 {
 	struct qxl_device *qdev = qxl_get_qdev(bdev);

 	switch (mem->mem_type) {
 	case TTM_PL_SYSTEM:
 		/* system memory */
 		return 0;
 	case TTM_PL_VRAM:
 		mem->bus.is_iomem = true;
 		mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
 		mem->bus.caching = ttm_write_combined;
 		break;
 	case TTM_PL_PRIV:
 		mem->bus.is_iomem = true;
 		mem->bus.offset = (mem->start << PAGE_SHIFT) +
 			qdev->surfaceram_base;
 		mem->bus.caching = ttm_write_combined;
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 /*
  * TTM backend functions.
  */
 static void qxl_ttm_backend_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
 {
 	ttm_tt_fini(ttm);
 	kfree(ttm);
 }

 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
 					uint32_t page_flags)
 {
 	struct ttm_tt *ttm;

 	ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
 	if (ttm == NULL)
 		return NULL;
 	if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
 		kfree(ttm);
 		return NULL;
 	}
 	return ttm;
 }

 static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
 			       struct ttm_resource *new_mem)
 {
 	struct qxl_bo *qbo;
 	struct qxl_device *qdev;

 	if (!qxl_ttm_bo_is_qxl_bo(bo) || !bo->resource)
 		return;
 	qbo = to_qxl_bo(bo);
 	qdev = to_qxl(qbo->tbo.base.dev);

 	if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
 		qxl_surface_evict(qdev, qbo, new_mem ? true : false);
 }

 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
 		       struct ttm_operation_ctx *ctx,
 		       struct ttm_resource *new_mem,
 		       struct ttm_place *hop)
 {
 	struct ttm_resource *old_mem = bo->resource;
 	int ret;

 	if (!old_mem) {
 		if (new_mem->mem_type != TTM_PL_SYSTEM) {
 			hop->mem_type = TTM_PL_SYSTEM;
 			hop->flags = TTM_PL_FLAG_TEMPORARY;
 			return -EMULTIHOP;
 		}

 		ttm_bo_move_null(bo, new_mem);
 		return 0;
 	}

 	qxl_bo_move_notify(bo, new_mem);

 	ret = ttm_bo_wait_ctx(bo, ctx);
 	if (ret)
 		return ret;

 	if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
 		ttm_bo_move_null(bo, new_mem);
 		return 0;
 	}
 	return ttm_bo_move_memcpy(bo, ctx, new_mem);
 }

 static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
 {
 	qxl_bo_move_notify(bo, NULL);
 }

 static struct ttm_device_funcs qxl_bo_driver = {
 	.ttm_tt_create = &qxl_ttm_tt_create,
 	.ttm_tt_destroy = &qxl_ttm_backend_destroy,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = &qxl_evict_flags,
 	.move = &qxl_bo_move,
 	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
 	.delete_mem_notify = &qxl_bo_delete_mem_notify,
 };

 static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
 				 unsigned int type,
 				 uint64_t size)
 {
 	return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
 }

 int qxl_ttm_init(struct qxl_device *qdev)
 {
 	int r;
 	int num_io_pages; /* != rom->num_io_pages, we include surface0 */

 	/* No others user of address space so set it to 0 */
 	r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
 			    qdev->ddev.anon_inode->i_mapping,
 			    qdev->ddev.vma_offset_manager,
 			    false, false);
 	if (r) {
 		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
 		return r;
 	}
 	/* NOTE: this includes the framebuffer (aka surface 0) */
 	num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
 	r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
 	if (r) {
 		DRM_ERROR("Failed initializing VRAM heap.\n");
 		return r;
 	}
 	r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
 				  qdev->surfaceram_size / PAGE_SIZE);
 	if (r) {
 		DRM_ERROR("Failed initializing Surfaces heap.\n");
 		return r;
 	}
 	DRM_INFO("qxl: %uM of VRAM memory size\n",
 		 (unsigned int)qdev->vram_size / (1024 * 1024));
 	DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
 		 ((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
 	DRM_INFO("qxl: %uM of Surface memory size\n",
 		 (unsigned int)qdev->surfaceram_size / (1024 * 1024));
 	return 0;
 }

 void qxl_ttm_fini(struct qxl_device *qdev)
 {
 	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
 	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
 	ttm_device_fini(&qdev->mman.bdev);
 	DRM_INFO("qxl: ttm finalized\n");
 }

 void qxl_ttm_debugfs_init(struct qxl_device *qdev)
 {
 #if defined(CONFIG_DEBUG_FS)
 	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
 							     TTM_PL_VRAM),
 					    qdev->ddev.primary->debugfs_root, "qxl_mem_mm");
 	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
 							     TTM_PL_PRIV),
 					    qdev->ddev.primary->debugfs_root, "qxl_surf_mm");
 #endif
 }
	/*
	* Copyright 2013 Red Hat Inc.
	*
	* 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, sublicense,
	* 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 above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* 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 NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
	*
	* Authors: Dave Airlie
	* Alon Levy
	*/

	#include <linux/delay.h>

	#include <drm/drm.h>
	#include <drm/drm_file.h>
	#include <drm/drm_debugfs.h>
	#include <drm/qxl_drm.h>
	#include <drm/ttm/ttm_bo.h>
	#include <drm/ttm/ttm_placement.h>
	#include <drm/ttm/ttm_range_manager.h>
	#include <drm/ttm/ttm_tt.h>

	#include "qxl_drv.h"
	#include "qxl_object.h"

	static struct qxl_device qxl_get_qdev(struct ttm_device bdev)
	{
	struct qxl_mman *mman;
	struct qxl_device *qdev;

	mman = container_of(bdev, struct qxl_mman, bdev);
	qdev = container_of(mman, struct qxl_device, mman);
	return qdev;
	}

	static void qxl_evict_flags(struct ttm_buffer_object *bo,
	struct ttm_placement *placement)
	{
	struct qxl_bo *qbo;
	static const struct ttm_place placements = {
	.fpfn = 0,
	.lpfn = 0,
	.mem_type = TTM_PL_SYSTEM,
	.flags = 0
	};

	if (!qxl_ttm_bo_is_qxl_bo(bo)) {
	placement->placement = &placements;
	placement->busy_placement = &placements;
	placement->num_placement = 1;
	placement->num_busy_placement = 1;
	return;
	}
	qbo = to_qxl_bo(bo);
	qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
	*placement = qbo->placement;
	}

	int qxl_ttm_io_mem_reserve(struct ttm_device *bdev,
	struct ttm_resource *mem)
	{
	struct qxl_device *qdev = qxl_get_qdev(bdev);

	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
	/* system memory */
	return 0;
	case TTM_PL_VRAM:
	mem->bus.is_iomem = true;
	mem->bus.offset = (mem->start << PAGE_SHIFT) + qdev->vram_base;
	mem->bus.caching = ttm_write_combined;
	break;
	case TTM_PL_PRIV:
	mem->bus.is_iomem = true;
	mem->bus.offset = (mem->start << PAGE_SHIFT) +
	qdev->surfaceram_base;
	mem->bus.caching = ttm_write_combined;
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	/*
	* TTM backend functions.
	*/
	static void qxl_ttm_backend_destroy(struct ttm_device bdev, struct ttm_tt ttm)
	{
	ttm_tt_fini(ttm);
	kfree(ttm);
	}

	static struct ttm_tt qxl_ttm_tt_create(struct ttm_buffer_object bo,
	uint32_t page_flags)
	{
	struct ttm_tt *ttm;

	ttm = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
	if (ttm == NULL)
	return NULL;
	if (ttm_tt_init(ttm, bo, page_flags, ttm_cached, 0)) {
	kfree(ttm);
	return NULL;
	}
	return ttm;
	}

	static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
	struct ttm_resource *new_mem)
	{
	struct qxl_bo *qbo;
	struct qxl_device *qdev;

	if (!qxl_ttm_bo_is_qxl_bo(bo) \|\| !bo->resource)
	return;
	qbo = to_qxl_bo(bo);
	qdev = to_qxl(qbo->tbo.base.dev);

	if (bo->resource->mem_type == TTM_PL_PRIV && qbo->surface_id)
	qxl_surface_evict(qdev, qbo, new_mem ? true : false);
	}

	static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
	struct ttm_operation_ctx *ctx,
	struct ttm_resource *new_mem,
	struct ttm_place *hop)
	{
	struct ttm_resource *old_mem = bo->resource;
	int ret;

	if (!old_mem) {
	if (new_mem->mem_type != TTM_PL_SYSTEM) {
	hop->mem_type = TTM_PL_SYSTEM;
	hop->flags = TTM_PL_FLAG_TEMPORARY;
	return -EMULTIHOP;
	}

	ttm_bo_move_null(bo, new_mem);
	return 0;
	}

	qxl_bo_move_notify(bo, new_mem);

	ret = ttm_bo_wait_ctx(bo, ctx);
	if (ret)
	return ret;

	if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
	ttm_bo_move_null(bo, new_mem);
	return 0;
	}
	return ttm_bo_move_memcpy(bo, ctx, new_mem);
	}

	static void qxl_bo_delete_mem_notify(struct ttm_buffer_object *bo)
	{
	qxl_bo_move_notify(bo, NULL);
	}

	static struct ttm_device_funcs qxl_bo_driver = {
	.ttm_tt_create = &qxl_ttm_tt_create,
	.ttm_tt_destroy = &qxl_ttm_backend_destroy,
	.eviction_valuable = ttm_bo_eviction_valuable,
	.evict_flags = &qxl_evict_flags,
	.move = &qxl_bo_move,
	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
	.delete_mem_notify = &qxl_bo_delete_mem_notify,
	};

	static int qxl_ttm_init_mem_type(struct qxl_device *qdev,
	unsigned int type,
	uint64_t size)
	{
	return ttm_range_man_init(&qdev->mman.bdev, type, false, size);
	}

	int qxl_ttm_init(struct qxl_device *qdev)
	{
	int r;
	int num_io_pages; /* != rom->num_io_pages, we include surface0 */

	/* No others user of address space so set it to 0 */
	r = ttm_device_init(&qdev->mman.bdev, &qxl_bo_driver, NULL,
	qdev->ddev.anon_inode->i_mapping,
	qdev->ddev.vma_offset_manager,
	false, false);
	if (r) {
	DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
	return r;
	}
	/* NOTE: this includes the framebuffer (aka surface 0) */
	num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
	r = qxl_ttm_init_mem_type(qdev, TTM_PL_VRAM, num_io_pages);
	if (r) {
	DRM_ERROR("Failed initializing VRAM heap.\n");
	return r;
	}
	r = qxl_ttm_init_mem_type(qdev, TTM_PL_PRIV,
	qdev->surfaceram_size / PAGE_SIZE);
	if (r) {
	DRM_ERROR("Failed initializing Surfaces heap.\n");
	return r;
	}
	DRM_INFO("qxl: %uM of VRAM memory size\n",
	(unsigned int)qdev->vram_size / (1024 * 1024));
	DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
	((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
	DRM_INFO("qxl: %uM of Surface memory size\n",
	(unsigned int)qdev->surfaceram_size / (1024 * 1024));
	return 0;
	}

	void qxl_ttm_fini(struct qxl_device *qdev)
	{
	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_VRAM);
	ttm_range_man_fini(&qdev->mman.bdev, TTM_PL_PRIV);
	ttm_device_fini(&qdev->mman.bdev);
	DRM_INFO("qxl: ttm finalized\n");
	}

	void qxl_ttm_debugfs_init(struct qxl_device *qdev)
	{
	#if defined(CONFIG_DEBUG_FS)
	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
	TTM_PL_VRAM),
	qdev->ddev.primary->debugfs_root, "qxl_mem_mm");
	ttm_resource_manager_create_debugfs(ttm_manager_type(&qdev->mman.bdev,
	TTM_PL_PRIV),
	qdev->ddev.primary->debugfs_root, "qxl_surf_mm");
	#endif
	}