1 // SPDX-License-Identifier: MIT
3 * Copyright © 2019 Intel Corporation
5 #include "i915_gem_client_blt.h"
7 #include "i915_gem_object_blt.h"
12 struct drm_i915_gem_object *obj;
13 struct sg_table *pages;
14 struct i915_page_sizes page_sizes;
17 static int vma_set_pages(struct i915_vma *vma)
19 struct i915_sleeve *sleeve = vma->private;
21 vma->pages = sleeve->pages;
22 vma->page_sizes = sleeve->page_sizes;
27 static void vma_clear_pages(struct i915_vma *vma)
29 GEM_BUG_ON(!vma->pages);
33 static int vma_bind(struct i915_vma *vma,
34 enum i915_cache_level cache_level,
37 return vma->vm->vma_ops.bind_vma(vma, cache_level, flags);
40 static void vma_unbind(struct i915_vma *vma)
42 vma->vm->vma_ops.unbind_vma(vma);
45 static const struct i915_vma_ops proxy_vma_ops = {
46 .set_pages = vma_set_pages,
47 .clear_pages = vma_clear_pages,
49 .unbind_vma = vma_unbind,
52 static struct i915_sleeve *create_sleeve(struct i915_address_space *vm,
53 struct drm_i915_gem_object *obj,
54 struct sg_table *pages,
55 struct i915_page_sizes *page_sizes)
57 struct i915_sleeve *sleeve;
61 sleeve = kzalloc(sizeof(*sleeve), GFP_KERNEL);
63 return ERR_PTR(-ENOMEM);
65 vma = i915_vma_instance(obj, vm, NULL);
71 vma->private = sleeve;
72 vma->ops = &proxy_vma_ops;
75 sleeve->obj = i915_gem_object_get(obj);
76 sleeve->pages = pages;
77 sleeve->page_sizes = *page_sizes;
86 static void destroy_sleeve(struct i915_sleeve *sleeve)
88 i915_gem_object_put(sleeve->obj);
92 struct clear_pages_work {
94 struct dma_fence_cb cb;
95 struct i915_sw_fence wait;
96 struct work_struct work;
97 struct irq_work irq_work;
98 struct i915_sleeve *sleeve;
99 struct intel_context *ce;
103 static const char *clear_pages_work_driver_name(struct dma_fence *fence)
108 static const char *clear_pages_work_timeline_name(struct dma_fence *fence)
113 static void clear_pages_work_release(struct dma_fence *fence)
115 struct clear_pages_work *w = container_of(fence, typeof(*w), dma);
117 destroy_sleeve(w->sleeve);
119 i915_sw_fence_fini(&w->wait);
121 BUILD_BUG_ON(offsetof(typeof(*w), dma));
122 dma_fence_free(&w->dma);
125 static const struct dma_fence_ops clear_pages_work_ops = {
126 .get_driver_name = clear_pages_work_driver_name,
127 .get_timeline_name = clear_pages_work_timeline_name,
128 .release = clear_pages_work_release,
131 static void clear_pages_signal_irq_worker(struct irq_work *work)
133 struct clear_pages_work *w = container_of(work, typeof(*w), irq_work);
135 dma_fence_signal(&w->dma);
136 dma_fence_put(&w->dma);
139 static void clear_pages_dma_fence_cb(struct dma_fence *fence,
140 struct dma_fence_cb *cb)
142 struct clear_pages_work *w = container_of(cb, typeof(*w), cb);
145 dma_fence_set_error(&w->dma, fence->error);
148 * Push the signalling of the fence into yet another worker to avoid
149 * the nightmare locking around the fence spinlock.
151 irq_work_queue(&w->irq_work);
154 static void clear_pages_worker(struct work_struct *work)
156 struct clear_pages_work *w = container_of(work, typeof(*w), work);
157 struct drm_i915_private *i915 = w->ce->gem_context->i915;
158 struct drm_i915_gem_object *obj = w->sleeve->obj;
159 struct i915_vma *vma = w->sleeve->vma;
160 struct i915_request *rq;
161 int err = w->dma.error;
166 if (obj->cache_dirty) {
167 obj->write_domain = 0;
168 if (i915_gem_object_has_struct_page(obj))
169 drm_clflush_sg(w->sleeve->pages);
170 obj->cache_dirty = false;
173 /* XXX: we need to kill this */
174 mutex_lock(&i915->drm.struct_mutex);
175 err = i915_vma_pin(vma, 0, 0, PIN_USER);
179 rq = i915_request_create(w->ce);
185 /* There's no way the fence has signalled */
186 if (dma_fence_add_callback(&rq->fence, &w->cb,
187 clear_pages_dma_fence_cb))
190 if (w->ce->engine->emit_init_breadcrumb) {
191 err = w->ce->engine->emit_init_breadcrumb(rq);
196 /* XXX: more feverish nightmares await */
198 err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
199 i915_vma_unlock(vma);
203 err = intel_emit_vma_fill_blt(rq, vma, w->value);
206 i915_request_skip(rq, err);
210 i915_request_add(rq);
214 mutex_unlock(&i915->drm.struct_mutex);
217 dma_fence_set_error(&w->dma, err);
218 dma_fence_signal(&w->dma);
219 dma_fence_put(&w->dma);
223 static int __i915_sw_fence_call
224 clear_pages_work_notify(struct i915_sw_fence *fence,
225 enum i915_sw_fence_notify state)
227 struct clear_pages_work *w = container_of(fence, typeof(*w), wait);
231 schedule_work(&w->work);
235 dma_fence_put(&w->dma);
242 static DEFINE_SPINLOCK(fence_lock);
244 /* XXX: better name please */
245 int i915_gem_schedule_fill_pages_blt(struct drm_i915_gem_object *obj,
246 struct intel_context *ce,
247 struct sg_table *pages,
248 struct i915_page_sizes *page_sizes,
251 struct drm_i915_private *i915 = to_i915(obj->base.dev);
252 struct i915_gem_context *ctx = ce->gem_context;
253 struct i915_address_space *vm = ctx->vm ?: &i915->ggtt.vm;
254 struct clear_pages_work *work;
255 struct i915_sleeve *sleeve;
258 sleeve = create_sleeve(vm, obj, pages, page_sizes);
260 return PTR_ERR(sleeve);
262 work = kmalloc(sizeof(*work), GFP_KERNEL);
264 destroy_sleeve(sleeve);
269 work->sleeve = sleeve;
272 INIT_WORK(&work->work, clear_pages_worker);
274 init_irq_work(&work->irq_work, clear_pages_signal_irq_worker);
276 dma_fence_init(&work->dma,
277 &clear_pages_work_ops,
279 i915->mm.unordered_timeline,
281 i915_sw_fence_init(&work->wait, clear_pages_work_notify);
283 i915_gem_object_lock(obj);
284 err = i915_sw_fence_await_reservation(&work->wait,
285 obj->base.resv, NULL,
286 true, I915_FENCE_TIMEOUT,
289 dma_fence_set_error(&work->dma, err);
291 reservation_object_add_excl_fence(obj->base.resv, &work->dma);
294 i915_gem_object_unlock(obj);
296 dma_fence_get(&work->dma);
297 i915_sw_fence_commit(&work->wait);
302 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
303 #include "selftests/i915_gem_client_blt.c"