2 * Copyright © 2016 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #include "gem/i915_gem_context.h"
26 #include "gt/intel_ring.h"
29 #include "intel_context.h"
30 #include "intel_engine_pm.h"
32 #include "mock_engine.h"
33 #include "selftests/mock_request.h"
35 static void mock_timeline_pin(struct intel_timeline *tl)
37 atomic_inc(&tl->pin_count);
40 static void mock_timeline_unpin(struct intel_timeline *tl)
42 GEM_BUG_ON(!atomic_read(&tl->pin_count));
43 atomic_dec(&tl->pin_count);
46 static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
48 const unsigned long sz = PAGE_SIZE / 2;
49 struct intel_ring *ring;
51 ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
55 kref_init(&ring->ref);
57 ring->effective_size = sz;
58 ring->vaddr = (void *)(ring + 1);
59 atomic_set(&ring->pin_count, 1);
61 ring->vma = i915_vma_alloc();
66 i915_active_init(&ring->vma->active, NULL, NULL);
67 __set_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(ring->vma));
68 __set_bit(DRM_MM_NODE_ALLOCATED_BIT, &ring->vma->node.flags);
69 ring->vma->node.size = sz;
71 intel_ring_update_space(ring);
76 static void mock_ring_free(struct intel_ring *ring)
78 i915_active_fini(&ring->vma->active);
79 i915_vma_free(ring->vma);
84 static struct i915_request *first_request(struct mock_engine *engine)
86 return list_first_entry_or_null(&engine->hw_queue,
91 static void advance(struct i915_request *request)
93 list_del_init(&request->mock.link);
94 i915_request_mark_complete(request);
95 GEM_BUG_ON(!i915_request_completed(request));
97 intel_engine_signal_breadcrumbs(request->engine);
100 static void hw_delay_complete(struct timer_list *t)
102 struct mock_engine *engine = from_timer(engine, t, hw_delay);
103 struct i915_request *request;
106 spin_lock_irqsave(&engine->hw_lock, flags);
108 /* Timer fired, first request is complete */
109 request = first_request(engine);
114 * Also immediately signal any subsequent 0-delay requests, but
115 * requeue the timer for the next delayed request.
117 while ((request = first_request(engine))) {
118 if (request->mock.delay) {
119 mod_timer(&engine->hw_delay,
120 jiffies + request->mock.delay);
127 spin_unlock_irqrestore(&engine->hw_lock, flags);
130 static void mock_context_unpin(struct intel_context *ce)
134 static void mock_context_post_unpin(struct intel_context *ce)
138 static void mock_context_destroy(struct kref *ref)
140 struct intel_context *ce = container_of(ref, typeof(*ce), ref);
142 GEM_BUG_ON(intel_context_is_pinned(ce));
144 if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) {
145 mock_ring_free(ce->ring);
146 mock_timeline_unpin(ce->timeline);
149 intel_context_fini(ce);
150 intel_context_free(ce);
153 static int mock_context_alloc(struct intel_context *ce)
155 ce->ring = mock_ring(ce->engine);
159 ce->timeline = intel_timeline_create(ce->engine->gt);
160 if (IS_ERR(ce->timeline)) {
162 return PTR_ERR(ce->timeline);
165 mock_timeline_pin(ce->timeline);
170 static int mock_context_pre_pin(struct intel_context *ce,
171 struct i915_gem_ww_ctx *ww, void **unused)
176 static int mock_context_pin(struct intel_context *ce, void *unused)
181 static void mock_context_reset(struct intel_context *ce)
185 static const struct intel_context_ops mock_context_ops = {
186 .alloc = mock_context_alloc,
188 .pre_pin = mock_context_pre_pin,
189 .pin = mock_context_pin,
190 .unpin = mock_context_unpin,
191 .post_unpin = mock_context_post_unpin,
193 .enter = intel_context_enter_engine,
194 .exit = intel_context_exit_engine,
196 .reset = mock_context_reset,
197 .destroy = mock_context_destroy,
200 static int mock_request_alloc(struct i915_request *request)
202 INIT_LIST_HEAD(&request->mock.link);
203 request->mock.delay = 0;
208 static int mock_emit_flush(struct i915_request *request,
214 static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs)
219 static void mock_submit_request(struct i915_request *request)
221 struct mock_engine *engine =
222 container_of(request->engine, typeof(*engine), base);
225 i915_request_submit(request);
227 spin_lock_irqsave(&engine->hw_lock, flags);
228 list_add_tail(&request->mock.link, &engine->hw_queue);
229 if (list_is_first(&request->mock.link, &engine->hw_queue)) {
230 if (request->mock.delay)
231 mod_timer(&engine->hw_delay,
232 jiffies + request->mock.delay);
236 spin_unlock_irqrestore(&engine->hw_lock, flags);
239 static void mock_reset_prepare(struct intel_engine_cs *engine)
243 static void mock_reset_rewind(struct intel_engine_cs *engine, bool stalled)
248 static void mock_reset_cancel(struct intel_engine_cs *engine)
250 struct i915_request *request;
253 spin_lock_irqsave(&engine->active.lock, flags);
255 /* Mark all submitted requests as skipped. */
256 list_for_each_entry(request, &engine->active.requests, sched.link) {
257 i915_request_set_error_once(request, -EIO);
258 i915_request_mark_complete(request);
261 spin_unlock_irqrestore(&engine->active.lock, flags);
264 static void mock_reset_finish(struct intel_engine_cs *engine)
268 static void mock_engine_release(struct intel_engine_cs *engine)
270 struct mock_engine *mock =
271 container_of(engine, typeof(*mock), base);
273 GEM_BUG_ON(timer_pending(&mock->hw_delay));
275 intel_breadcrumbs_free(engine->breadcrumbs);
277 intel_context_unpin(engine->kernel_context);
278 intel_context_put(engine->kernel_context);
280 intel_engine_fini_retire(engine);
283 struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
287 struct mock_engine *engine;
289 GEM_BUG_ON(id >= I915_NUM_ENGINES);
290 GEM_BUG_ON(!i915->gt.uncore);
292 engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL);
296 /* minimal engine setup for requests */
297 engine->base.i915 = i915;
298 engine->base.gt = &i915->gt;
299 engine->base.uncore = i915->gt.uncore;
300 snprintf(engine->base.name, sizeof(engine->base.name), "%s", name);
301 engine->base.id = id;
302 engine->base.mask = BIT(id);
303 engine->base.legacy_idx = INVALID_ENGINE;
304 engine->base.instance = id;
305 engine->base.status_page.addr = (void *)(engine + 1);
307 engine->base.cops = &mock_context_ops;
308 engine->base.request_alloc = mock_request_alloc;
309 engine->base.emit_flush = mock_emit_flush;
310 engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb;
311 engine->base.submit_request = mock_submit_request;
313 engine->base.reset.prepare = mock_reset_prepare;
314 engine->base.reset.rewind = mock_reset_rewind;
315 engine->base.reset.cancel = mock_reset_cancel;
316 engine->base.reset.finish = mock_reset_finish;
318 engine->base.release = mock_engine_release;
320 i915->gt.engine[id] = &engine->base;
321 i915->gt.engine_class[0][id] = &engine->base;
324 spin_lock_init(&engine->hw_lock);
325 timer_setup(&engine->hw_delay, hw_delay_complete, 0);
326 INIT_LIST_HEAD(&engine->hw_queue);
328 intel_engine_add_user(&engine->base);
330 return &engine->base;
333 int mock_engine_init(struct intel_engine_cs *engine)
335 struct intel_context *ce;
337 intel_engine_init_active(engine, ENGINE_MOCK);
338 intel_engine_init_execlists(engine);
339 intel_engine_init__pm(engine);
340 intel_engine_init_retire(engine);
342 engine->breadcrumbs = intel_breadcrumbs_create(NULL);
343 if (!engine->breadcrumbs)
346 ce = create_kernel_context(engine);
348 goto err_breadcrumbs;
350 /* We insist the kernel context is using the status_page */
351 engine->status_page.vma = ce->timeline->hwsp_ggtt;
353 engine->kernel_context = ce;
357 intel_breadcrumbs_free(engine->breadcrumbs);
361 void mock_engine_flush(struct intel_engine_cs *engine)
363 struct mock_engine *mock =
364 container_of(engine, typeof(*mock), base);
365 struct i915_request *request, *rn;
367 del_timer_sync(&mock->hw_delay);
369 spin_lock_irq(&mock->hw_lock);
370 list_for_each_entry_safe(request, rn, &mock->hw_queue, mock.link)
372 spin_unlock_irq(&mock->hw_lock);
375 void mock_engine_reset(struct intel_engine_cs *engine)