diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_clflush.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_clflush.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_clflush.c b/drivers/gpu/drm/i915/i915_gem_clflush.c deleted file mode 100644 index 8e74c23cbd91..000000000000 --- a/drivers/gpu/drm/i915/i915_gem_clflush.c +++ /dev/null @@ -1,178 +0,0 @@ -/* - * Copyright © 2016 Intel Corporation - * - * 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 (including the next - * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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. - * - */ - -#include "i915_drv.h" -#include "intel_frontbuffer.h" -#include "i915_gem_clflush.h" - -static DEFINE_SPINLOCK(clflush_lock); - -struct clflush { - struct dma_fence dma; /* Must be first for dma_fence_free() */ - struct i915_sw_fence wait; - struct work_struct work; - struct drm_i915_gem_object *obj; -}; - -static const char *i915_clflush_get_driver_name(struct dma_fence *fence) -{ - return DRIVER_NAME; -} - -static const char *i915_clflush_get_timeline_name(struct dma_fence *fence) -{ - return "clflush"; -} - -static void i915_clflush_release(struct dma_fence *fence) -{ - struct clflush *clflush = container_of(fence, typeof(*clflush), dma); - - i915_sw_fence_fini(&clflush->wait); - - BUILD_BUG_ON(offsetof(typeof(*clflush), dma)); - dma_fence_free(&clflush->dma); -} - -static const struct dma_fence_ops i915_clflush_ops = { - .get_driver_name = i915_clflush_get_driver_name, - .get_timeline_name = i915_clflush_get_timeline_name, - .release = i915_clflush_release, -}; - -static void __i915_do_clflush(struct drm_i915_gem_object *obj) -{ - GEM_BUG_ON(!i915_gem_object_has_pages(obj)); - drm_clflush_sg(obj->mm.pages); - intel_fb_obj_flush(obj, ORIGIN_CPU); -} - -static void i915_clflush_work(struct work_struct *work) -{ - struct clflush *clflush = container_of(work, typeof(*clflush), work); - struct drm_i915_gem_object *obj = clflush->obj; - - if (i915_gem_object_pin_pages(obj)) { - DRM_ERROR("Failed to acquire obj->pages for clflushing\n"); - goto out; - } - - __i915_do_clflush(obj); - - i915_gem_object_unpin_pages(obj); - -out: - i915_gem_object_put(obj); - - dma_fence_signal(&clflush->dma); - dma_fence_put(&clflush->dma); -} - -static int __i915_sw_fence_call -i915_clflush_notify(struct i915_sw_fence *fence, - enum i915_sw_fence_notify state) -{ - struct clflush *clflush = container_of(fence, typeof(*clflush), wait); - - switch (state) { - case FENCE_COMPLETE: - schedule_work(&clflush->work); - break; - - case FENCE_FREE: - dma_fence_put(&clflush->dma); - break; - } - - return NOTIFY_DONE; -} - -bool i915_gem_clflush_object(struct drm_i915_gem_object *obj, - unsigned int flags) -{ - struct clflush *clflush; - - /* - * Stolen memory is always coherent with the GPU as it is explicitly - * marked as wc by the system, or the system is cache-coherent. - * Similarly, we only access struct pages through the CPU cache, so - * anything not backed by physical memory we consider to be always - * coherent and not need clflushing. - */ - if (!i915_gem_object_has_struct_page(obj)) { - obj->cache_dirty = false; - return false; - } - - /* If the GPU is snooping the contents of the CPU cache, - * we do not need to manually clear the CPU cache lines. However, - * the caches are only snooped when the render cache is - * flushed/invalidated. As we always have to emit invalidations - * and flushes when moving into and out of the RENDER domain, correct - * snooping behaviour occurs naturally as the result of our domain - * tracking. - */ - if (!(flags & I915_CLFLUSH_FORCE) && - obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ) - return false; - - trace_i915_gem_object_clflush(obj); - - clflush = NULL; - if (!(flags & I915_CLFLUSH_SYNC)) - clflush = kmalloc(sizeof(*clflush), GFP_KERNEL); - if (clflush) { - GEM_BUG_ON(!obj->cache_dirty); - - dma_fence_init(&clflush->dma, - &i915_clflush_ops, - &clflush_lock, - to_i915(obj->base.dev)->mm.unordered_timeline, - 0); - i915_sw_fence_init(&clflush->wait, i915_clflush_notify); - - clflush->obj = i915_gem_object_get(obj); - INIT_WORK(&clflush->work, i915_clflush_work); - - dma_fence_get(&clflush->dma); - - i915_sw_fence_await_reservation(&clflush->wait, - obj->resv, NULL, - true, I915_FENCE_TIMEOUT, - I915_FENCE_GFP); - - reservation_object_lock(obj->resv, NULL); - reservation_object_add_excl_fence(obj->resv, &clflush->dma); - reservation_object_unlock(obj->resv); - - i915_sw_fence_commit(&clflush->wait); - } else if (obj->mm.pages) { - __i915_do_clflush(obj); - } else { - GEM_BUG_ON(obj->write_domain != I915_GEM_DOMAIN_CPU); - } - - obj->cache_dirty = false; - return true; -} |