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- /*
- * 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 = to_qxl(bo->tbo.base.dev);
- qxl_surface_evict(qdev, bo, false);
- WARN_ON_ONCE(bo->map_count > 0);
- mutex_lock(&qdev->gem.mutex);
- list_del_init(&bo->list);
- mutex_unlock(&qdev->gem.mutex);
- drm_gem_object_release(&bo->tbo.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 = 0;
- unsigned int i;
- if (pinned)
- pflag |= TTM_PL_FLAG_NO_EVICT;
- if (qbo->tbo.base.size <= PAGE_SIZE)
- pflag |= TTM_PL_FLAG_TOPDOWN;
- qbo->placement.placement = qbo->placements;
- qbo->placement.busy_placement = qbo->placements;
- if (domain == QXL_GEM_DOMAIN_VRAM) {
- qbo->placements[c].mem_type = TTM_PL_VRAM;
- qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag;
- }
- if (domain == QXL_GEM_DOMAIN_SURFACE) {
- qbo->placements[c].mem_type = TTM_PL_PRIV;
- qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag;
- qbo->placements[c].mem_type = TTM_PL_VRAM;
- qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | pflag;
- }
- if (domain == QXL_GEM_DOMAIN_CPU) {
- qbo->placements[c].mem_type = TTM_PL_SYSTEM;
- qbo->placements[c++].flags = TTM_PL_MASK_CACHING | pflag;
- }
- if (!c) {
- qbo->placements[c].mem_type = TTM_PL_SYSTEM;
- qbo->placements[c++].flags = TTM_PL_MASK_CACHING;
- }
- 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;
- }
- }
- static const struct drm_gem_object_funcs qxl_object_funcs = {
- .free = qxl_gem_object_free,
- .open = qxl_gem_object_open,
- .close = qxl_gem_object_close,
- .pin = qxl_gem_prime_pin,
- .unpin = qxl_gem_prime_unpin,
- .get_sg_table = qxl_gem_prime_get_sg_table,
- .vmap = qxl_gem_prime_vmap,
- .vunmap = qxl_gem_prime_vunmap,
- .mmap = drm_gem_ttm_mmap,
- .print_info = drm_gem_ttm_print_info,
- };
- int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
- bool kernel, bool pinned, u32 domain, u32 priority,
- 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->tbo.base, size);
- if (unlikely(r)) {
- kfree(bo);
- return r;
- }
- bo->tbo.base.funcs = &qxl_object_funcs;
- 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);
- bo->tbo.priority = priority;
- r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
- &bo->placement, 0, !kernel, size,
- NULL, NULL, &qxl_ttm_bo_destroy);
- if (unlikely(r != 0)) {
- if (r != -ERESTARTSYS)
- dev_err(qdev->ddev.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;
- bo->map_count++;
- 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;
- bo->map_count = 1;
- return 0;
- }
- void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
- struct qxl_bo *bo, int page_offset)
- {
- unsigned long offset;
- 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_PRIV)
- map = qdev->surface_mapping;
- else
- goto fallback;
- offset = bo->tbo.mem.start << PAGE_SHIFT;
- return io_mapping_map_atomic_wc(map, 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->map_count--;
- if (bo->map_count > 0)
- 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)
- {
- if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) &&
- (bo->tbo.mem.mem_type != TTM_PL_PRIV))
- goto fallback;
- io_mapping_unmap_atomic(pmap);
- return;
- fallback:
- qxl_bo_kunmap(bo);
- }
- void qxl_bo_unref(struct qxl_bo **bo)
- {
- if ((*bo) == NULL)
- return;
- drm_gem_object_put(&(*bo)->tbo.base);
- *bo = NULL;
- }
- struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
- {
- drm_gem_object_get(&bo->tbo.base);
- return bo;
- }
- static int __qxl_bo_pin(struct qxl_bo *bo)
- {
- struct ttm_operation_ctx ctx = { false, false };
- struct drm_device *ddev = bo->tbo.base.dev;
- int r;
- if (bo->pin_count) {
- bo->pin_count++;
- return 0;
- }
- qxl_ttm_placement_from_domain(bo, bo->type, true);
- r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
- if (likely(r == 0)) {
- bo->pin_count = 1;
- }
- if (unlikely(r != 0))
- dev_err(ddev->dev, "%p pin failed\n", bo);
- return r;
- }
- static int __qxl_bo_unpin(struct qxl_bo *bo)
- {
- struct ttm_operation_ctx ctx = { false, false };
- struct drm_device *ddev = bo->tbo.base.dev;
- int r, i;
- if (!bo->pin_count) {
- dev_warn(ddev->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, &ctx);
- if (unlikely(r != 0))
- dev_err(ddev->dev, "%p validate failed for unpin\n", bo);
- return r;
- }
- /*
- * Reserve the BO before pinning the object. If the BO was reserved
- * beforehand, use the internal version directly __qxl_bo_pin.
- *
- */
- int qxl_bo_pin(struct qxl_bo *bo)
- {
- int r;
- r = qxl_bo_reserve(bo);
- if (r)
- return r;
- r = __qxl_bo_pin(bo);
- qxl_bo_unreserve(bo);
- return r;
- }
- /*
- * Reserve the BO before pinning the object. If the BO was reserved
- * beforehand, use the internal version directly __qxl_bo_unpin.
- *
- */
- int qxl_bo_unpin(struct qxl_bo *bo)
- {
- int r;
- r = qxl_bo_reserve(bo);
- if (r)
- return r;
- r = __qxl_bo_unpin(bo);
- qxl_bo_unreserve(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->ddev.dev, "Userspace still has active objects !\n");
- list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
- dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
- &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
- *((unsigned long *)&bo->tbo.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_put(&bo->tbo.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);
- if (ret)
- return ret;
- }
- return 0;
- }
- int qxl_surf_evict(struct qxl_device *qdev)
- {
- return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV);
- }
- int qxl_vram_evict(struct qxl_device *qdev)
- {
- return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
- }
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