drivers/gpu/drm/qxl/qxl_object.c - kernel/quantenna - 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 "qxl_drv.h"
 #include "qxl_object.h"

 #include <linux/io-mapping.h>
 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
 {
 	struct qxl_bo *bo;
 	struct qxl_device *qdev;

 	bo = to_qxl_bo(tbo);
 	qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;

 	qxl_surface_evict(qdev, bo, false);
 	mutex_lock(&qdev->gem.mutex);
 	list_del_init(&bo->list);
 	mutex_unlock(&qdev->gem.mutex);
 	drm_gem_object_release(&bo->gem_base);
 	kfree(bo);
 }

 bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
 {
 	if (bo->destroy == &qxl_ttm_bo_destroy)
 		return true;
 	return false;
 }

 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
 {
 	u32 c = 0;
 	u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
 	unsigned i;

 	qbo->placement.placement = qbo->placements;
 	qbo->placement.busy_placement = qbo->placements;
 	if (domain == QXL_GEM_DOMAIN_VRAM)
 		qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag;
 	if (domain == QXL_GEM_DOMAIN_SURFACE)
 		qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV0 | pflag;
 	if (domain == QXL_GEM_DOMAIN_CPU)
 		qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag;
 	if (!c)
 		qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
 	qbo->placement.num_placement = c;
 	qbo->placement.num_busy_placement = c;
 	for (i = 0; i < c; ++i) {
 		qbo->placements[i].fpfn = 0;
 		qbo->placements[i].lpfn = 0;
 	}
 }


 int qxl_bo_create(struct qxl_device *qdev,
 		  unsigned long size, bool kernel, bool pinned, u32 domain,
 		  struct qxl_surface *surf,
 		  struct qxl_bo **bo_ptr)
 {
 	struct qxl_bo *bo;
 	enum ttm_bo_type type;
 	int r;

 	if (kernel)
 		type = ttm_bo_type_kernel;
 	else
 		type = ttm_bo_type_device;
 	*bo_ptr = NULL;
 	bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
 	if (bo == NULL)
 		return -ENOMEM;
 	size = roundup(size, PAGE_SIZE);
 	r = drm_gem_object_init(qdev->ddev, &bo->gem_base, size);
 	if (unlikely(r)) {
 		kfree(bo);
 		return r;
 	}
 	bo->type = domain;
 	bo->pin_count = pinned ? 1 : 0;
 	bo->surface_id = 0;
 	INIT_LIST_HEAD(&bo->list);

 	if (surf)
 		bo->surf = *surf;

 	qxl_ttm_placement_from_domain(bo, domain, pinned);

 	r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
 			&bo->placement, 0, !kernel, NULL, size,
 			NULL, NULL, &qxl_ttm_bo_destroy);
 	if (unlikely(r != 0)) {
 		if (r != -ERESTARTSYS)
 			dev_err(qdev->dev,
 				"object_init failed for (%lu, 0x%08X)\n",
 				size, domain);
 		return r;
 	}
 	*bo_ptr = bo;
 	return 0;
 }

 int qxl_bo_kmap(struct qxl_bo *bo, void **ptr)
 {
 	bool is_iomem;
 	int r;

 	if (bo->kptr) {
 		if (ptr)
 			*ptr = bo->kptr;
 		return 0;
 	}
 	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
 	if (r)
 		return r;
 	bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
 	if (ptr)
 		*ptr = bo->kptr;
 	return 0;
 }

 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 			      struct qxl_bo *bo, int page_offset)
 {
 	struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
 	void *rptr;
 	int ret;
 	struct io_mapping *map;

 	if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 		map = qdev->vram_mapping;
 	else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
 		map = qdev->surface_mapping;
 	else
 		goto fallback;

 	(void) ttm_mem_io_lock(man, false);
 	ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem);
 	ttm_mem_io_unlock(man);

 	return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset);
 fallback:
 	if (bo->kptr) {
 		rptr = bo->kptr + (page_offset * PAGE_SIZE);
 		return rptr;
 	}

 	ret = qxl_bo_kmap(bo, &rptr);
 	if (ret)
 		return NULL;

 	rptr += page_offset * PAGE_SIZE;
 	return rptr;
 }

 void qxl_bo_kunmap(struct qxl_bo *bo)
 {
 	if (bo->kptr == NULL)
 		return;
 	bo->kptr = NULL;
 	ttm_bo_kunmap(&bo->kmap);
 }

 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 			       struct qxl_bo *bo, void *pmap)
 {
 	struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
 	struct io_mapping *map;

 	if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 		map = qdev->vram_mapping;
 	else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
 		map = qdev->surface_mapping;
 	else
 		goto fallback;

 	io_mapping_unmap_atomic(pmap);

 	(void) ttm_mem_io_lock(man, false);
 	ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
 	ttm_mem_io_unlock(man);
 	return ;
  fallback:
 	qxl_bo_kunmap(bo);
 }

 void qxl_bo_unref(struct qxl_bo **bo)
 {
 	if ((*bo) == NULL)
 		return;

 	drm_gem_object_unreference_unlocked(&(*bo)->gem_base);
 	*bo = NULL;
 }

 struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
 {
 	drm_gem_object_reference(&bo->gem_base);
 	return bo;
 }

 int qxl_bo_pin(struct qxl_bo *bo, u32 domain, u64 *gpu_addr)
 {
 	struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
 	int r;

 	if (bo->pin_count) {
 		bo->pin_count++;
 		if (gpu_addr)
 			*gpu_addr = qxl_bo_gpu_offset(bo);
 		return 0;
 	}
 	qxl_ttm_placement_from_domain(bo, domain, true);
 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 	if (likely(r == 0)) {
 		bo->pin_count = 1;
 		if (gpu_addr != NULL)
 			*gpu_addr = qxl_bo_gpu_offset(bo);
 	}
 	if (unlikely(r != 0))
 		dev_err(qdev->dev, "%p pin failed\n", bo);
 	return r;
 }

 int qxl_bo_unpin(struct qxl_bo *bo)
 {
 	struct qxl_device *qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;
 	int r, i;

 	if (!bo->pin_count) {
 		dev_warn(qdev->dev, "%p unpin not necessary\n", bo);
 		return 0;
 	}
 	bo->pin_count--;
 	if (bo->pin_count)
 		return 0;
 	for (i = 0; i < bo->placement.num_placement; i++)
 		bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
 	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
 	if (unlikely(r != 0))
 		dev_err(qdev->dev, "%p validate failed for unpin\n", bo);
 	return r;
 }

 void qxl_bo_force_delete(struct qxl_device *qdev)
 {
 	struct qxl_bo *bo, *n;

 	if (list_empty(&qdev->gem.objects))
 		return;
 	dev_err(qdev->dev, "Userspace still has active objects !\n");
 	list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
 		dev_err(qdev->dev, "%p %p %lu %lu force free\n",
 			&bo->gem_base, bo, (unsigned long)bo->gem_base.size,
 			*((unsigned long *)&bo->gem_base.refcount));
 		mutex_lock(&qdev->gem.mutex);
 		list_del_init(&bo->list);
 		mutex_unlock(&qdev->gem.mutex);
 		/* this should unref the ttm bo */
 		drm_gem_object_unreference_unlocked(&bo->gem_base);
 	}
 }

 int qxl_bo_init(struct qxl_device *qdev)
 {
 	return qxl_ttm_init(qdev);
 }

 void qxl_bo_fini(struct qxl_device *qdev)
 {
 	qxl_ttm_fini(qdev);
 }

 int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
 {
 	int ret;
 	if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
 		/* allocate a surface id for this surface now */
 		ret = qxl_surface_id_alloc(qdev, bo);
 		if (ret)
 			return ret;

 		ret = qxl_hw_surface_alloc(qdev, bo, NULL);
 		if (ret)
 			return ret;
 	}
 	return 0;
 }

 int qxl_surf_evict(struct qxl_device *qdev)
 {
 	return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
 }

 int qxl_vram_evict(struct qxl_device *qdev)
 {
 	return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
 }
	/*
	* 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 "qxl_drv.h"
	#include "qxl_object.h"

	#include <linux/io-mapping.h>
	static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
	{
	struct qxl_bo *bo;
	struct qxl_device *qdev;

	bo = to_qxl_bo(tbo);
	qdev = (struct qxl_device *)bo->gem_base.dev->dev_private;

	qxl_surface_evict(qdev, bo, false);
	mutex_lock(&qdev->gem.mutex);
	list_del_init(&bo->list);
	mutex_unlock(&qdev->gem.mutex);
	drm_gem_object_release(&bo->gem_base);
	kfree(bo);
	}

	bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
	{
	if (bo->destroy == &qxl_ttm_bo_destroy)
	return true;
	return false;
	}

	void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
	{
	u32 c = 0;
	u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
	unsigned i;

	qbo->placement.placement = qbo->placements;
	qbo->placement.busy_placement = qbo->placements;
	if (domain == QXL_GEM_DOMAIN_VRAM)
	qbo->placements[c++].flags = TTM_PL_FLAG_CACHED \| TTM_PL_FLAG_VRAM \| pflag;
	if (domain == QXL_GEM_DOMAIN_SURFACE)
	qbo->placements[c++].flags = TTM_PL_FLAG_CACHED \| TTM_PL_FLAG_PRIV0 \| pflag;
	if (domain == QXL_GEM_DOMAIN_CPU)
	qbo->placements[c++].flags = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM \| pflag;
	if (!c)
	qbo->placements[c++].flags = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	qbo->placement.num_placement = c;
	qbo->placement.num_busy_placement = c;
	for (i = 0; i < c; ++i) {
	qbo->placements[i].fpfn = 0;
	qbo->placements[i].lpfn = 0;
	}
	}


	int qxl_bo_create(struct qxl_device *qdev,
	unsigned long size, bool kernel, bool pinned, u32 domain,
	struct qxl_surface *surf,
	struct qxl_bo **bo_ptr)
	{
	struct qxl_bo *bo;
	enum ttm_bo_type type;
	int r;

	if (kernel)
	type = ttm_bo_type_kernel;
	else
	type = ttm_bo_type_device;
	*bo_ptr = NULL;
	bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
	if (bo == NULL)
	return -ENOMEM;
	size = roundup(size, PAGE_SIZE);
	r = drm_gem_object_init(qdev->ddev, &bo->gem_base, size);
	if (unlikely(r)) {
	kfree(bo);
	return r;
	}
	bo->type = domain;
	bo->pin_count = pinned ? 1 : 0;
	bo->surface_id = 0;
	INIT_LIST_HEAD(&bo->list);

	if (surf)
	bo->surf = *surf;

	qxl_ttm_placement_from_domain(bo, domain, pinned);

	r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
	&bo->placement, 0, !kernel, NULL, size,
	NULL, NULL, &qxl_ttm_bo_destroy);
	if (unlikely(r != 0)) {
	if (r != -ERESTARTSYS)
	dev_err(qdev->dev,
	"object_init failed for (%lu, 0x%08X)\n",
	size, domain);
	return r;
	}
	*bo_ptr = bo;
	return 0;
	}

	int qxl_bo_kmap(struct qxl_bo bo, void *ptr)
	{
	bool is_iomem;
	int r;

	if (bo->kptr) {
	if (ptr)
	*ptr = bo->kptr;
	return 0;
	}
	r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
	if (r)
	return r;
	bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
	if (ptr)
	*ptr = bo->kptr;
	return 0;
	}

	void qxl_bo_kmap_atomic_page(struct qxl_device qdev,
	struct qxl_bo *bo, int page_offset)
	{
	struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
	void *rptr;
	int ret;
	struct io_mapping *map;

	if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
	map = qdev->vram_mapping;
	else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
	map = qdev->surface_mapping;
	else
	goto fallback;

	(void) ttm_mem_io_lock(man, false);
	ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem);
	ttm_mem_io_unlock(man);

	return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset);
	fallback:
	if (bo->kptr) {
	rptr = bo->kptr + (page_offset * PAGE_SIZE);
	return rptr;
	}

	ret = qxl_bo_kmap(bo, &rptr);
	if (ret)
	return NULL;

	rptr += page_offset * PAGE_SIZE;
	return rptr;
	}

	void qxl_bo_kunmap(struct qxl_bo *bo)
	{
	if (bo->kptr == NULL)
	return;
	bo->kptr = NULL;
	ttm_bo_kunmap(&bo->kmap);
	}

	void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
	struct qxl_bo bo, void pmap)
	{
	struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
	struct io_mapping *map;

	if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
	map = qdev->vram_mapping;
	else if (bo->tbo.mem.mem_type == TTM_PL_PRIV0)
	map = qdev->surface_mapping;
	else
	goto fallback;

	io_mapping_unmap_atomic(pmap);

	(void) ttm_mem_io_lock(man, false);
	ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
	ttm_mem_io_unlock(man);
	return ;
	fallback:
	qxl_bo_kunmap(bo);
	}

	void qxl_bo_unref(struct qxl_bo **bo)
	{
	if ((*bo) == NULL)
	return;

	drm_gem_object_unreference_unlocked(&(*bo)->gem_base);
	*bo = NULL;
	}

	struct qxl_bo qxl_bo_ref(struct qxl_bo bo)
	{
	drm_gem_object_reference(&bo->gem_base);
	return bo;
	}

	int qxl_bo_pin(struct qxl_bo bo, u32 domain, u64 gpu_addr)
	{
	struct qxl_device qdev = (struct qxl_device )bo->gem_base.dev->dev_private;
	int r;

	if (bo->pin_count) {
	bo->pin_count++;
	if (gpu_addr)
	*gpu_addr = qxl_bo_gpu_offset(bo);
	return 0;
	}
	qxl_ttm_placement_from_domain(bo, domain, true);
	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
	if (likely(r == 0)) {
	bo->pin_count = 1;
	if (gpu_addr != NULL)
	*gpu_addr = qxl_bo_gpu_offset(bo);
	}
	if (unlikely(r != 0))
	dev_err(qdev->dev, "%p pin failed\n", bo);
	return r;
	}

	int qxl_bo_unpin(struct qxl_bo *bo)
	{
	struct qxl_device qdev = (struct qxl_device )bo->gem_base.dev->dev_private;
	int r, i;

	if (!bo->pin_count) {
	dev_warn(qdev->dev, "%p unpin not necessary\n", bo);
	return 0;
	}
	bo->pin_count--;
	if (bo->pin_count)
	return 0;
	for (i = 0; i < bo->placement.num_placement; i++)
	bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
	r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
	if (unlikely(r != 0))
	dev_err(qdev->dev, "%p validate failed for unpin\n", bo);
	return r;
	}

	void qxl_bo_force_delete(struct qxl_device *qdev)
	{
	struct qxl_bo bo, n;

	if (list_empty(&qdev->gem.objects))
	return;
	dev_err(qdev->dev, "Userspace still has active objects !\n");
	list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
	dev_err(qdev->dev, "%p %p %lu %lu force free\n",
	&bo->gem_base, bo, (unsigned long)bo->gem_base.size,
	((unsigned long )&bo->gem_base.refcount));
	mutex_lock(&qdev->gem.mutex);
	list_del_init(&bo->list);
	mutex_unlock(&qdev->gem.mutex);
	/* this should unref the ttm bo */
	drm_gem_object_unreference_unlocked(&bo->gem_base);
	}
	}

	int qxl_bo_init(struct qxl_device *qdev)
	{
	return qxl_ttm_init(qdev);
	}

	void qxl_bo_fini(struct qxl_device *qdev)
	{
	qxl_ttm_fini(qdev);
	}

	int qxl_bo_check_id(struct qxl_device qdev, struct qxl_bo bo)
	{
	int ret;
	if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
	/* allocate a surface id for this surface now */
	ret = qxl_surface_id_alloc(qdev, bo);
	if (ret)
	return ret;

	ret = qxl_hw_surface_alloc(qdev, bo, NULL);
	if (ret)
	return ret;
	}
	return 0;
	}

	int qxl_surf_evict(struct qxl_device *qdev)
	{
	return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
	}

	int qxl_vram_evict(struct qxl_device *qdev)
	{
	return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
	}