1 // SPDX-License-Identifier: MIT
3 * Copyright © 2016 Intel Corporation
6 #include "gem/i915_gem_context.h"
7 #include "gt/intel_ring.h"
10 #include "intel_context.h"
11 #include "intel_engine_pm.h"
13 #include "mock_engine.h"
14 #include "selftests/mock_request.h"
16 static int mock_timeline_pin(struct intel_timeline *tl)
20 if (WARN_ON(!i915_gem_object_trylock(tl->hwsp_ggtt->obj)))
23 err = intel_timeline_pin_map(tl);
24 i915_gem_object_unlock(tl->hwsp_ggtt->obj);
28 atomic_inc(&tl->pin_count);
32 static void mock_timeline_unpin(struct intel_timeline *tl)
34 GEM_BUG_ON(!atomic_read(&tl->pin_count));
35 atomic_dec(&tl->pin_count);
38 static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
40 const unsigned long sz = PAGE_SIZE / 2;
41 struct intel_ring *ring;
43 ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
47 kref_init(&ring->ref);
49 ring->effective_size = sz;
50 ring->vaddr = (void *)(ring + 1);
51 atomic_set(&ring->pin_count, 1);
53 ring->vma = i915_vma_alloc();
58 i915_active_init(&ring->vma->active, NULL, NULL, 0);
59 __set_bit(I915_VMA_GGTT_BIT, __i915_vma_flags(ring->vma));
60 __set_bit(DRM_MM_NODE_ALLOCATED_BIT, &ring->vma->node.flags);
61 ring->vma->node.size = sz;
63 intel_ring_update_space(ring);
68 static void mock_ring_free(struct intel_ring *ring)
70 i915_active_fini(&ring->vma->active);
71 i915_vma_free(ring->vma);
76 static struct i915_request *first_request(struct mock_engine *engine)
78 return list_first_entry_or_null(&engine->hw_queue,
83 static void advance(struct i915_request *request)
85 list_del_init(&request->mock.link);
86 i915_request_mark_complete(request);
87 GEM_BUG_ON(!i915_request_completed(request));
89 intel_engine_signal_breadcrumbs(request->engine);
92 static void hw_delay_complete(struct timer_list *t)
94 struct mock_engine *engine = from_timer(engine, t, hw_delay);
95 struct i915_request *request;
98 spin_lock_irqsave(&engine->hw_lock, flags);
100 /* Timer fired, first request is complete */
101 request = first_request(engine);
106 * Also immediately signal any subsequent 0-delay requests, but
107 * requeue the timer for the next delayed request.
109 while ((request = first_request(engine))) {
110 if (request->mock.delay) {
111 mod_timer(&engine->hw_delay,
112 jiffies + request->mock.delay);
119 spin_unlock_irqrestore(&engine->hw_lock, flags);
122 static void mock_context_unpin(struct intel_context *ce)
126 static void mock_context_post_unpin(struct intel_context *ce)
130 static void mock_context_destroy(struct kref *ref)
132 struct intel_context *ce = container_of(ref, typeof(*ce), ref);
134 GEM_BUG_ON(intel_context_is_pinned(ce));
136 if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) {
137 mock_ring_free(ce->ring);
138 mock_timeline_unpin(ce->timeline);
141 intel_context_fini(ce);
142 intel_context_free(ce);
145 static int mock_context_alloc(struct intel_context *ce)
149 ce->ring = mock_ring(ce->engine);
153 ce->timeline = intel_timeline_create(ce->engine->gt);
154 if (IS_ERR(ce->timeline)) {
156 return PTR_ERR(ce->timeline);
159 err = mock_timeline_pin(ce->timeline);
161 intel_timeline_put(ce->timeline);
169 static int mock_context_pre_pin(struct intel_context *ce,
170 struct i915_gem_ww_ctx *ww, void **unused)
175 static int mock_context_pin(struct intel_context *ce, void *unused)
180 static void mock_context_reset(struct intel_context *ce)
184 static const struct intel_context_ops mock_context_ops = {
185 .alloc = mock_context_alloc,
187 .pre_pin = mock_context_pre_pin,
188 .pin = mock_context_pin,
189 .unpin = mock_context_unpin,
190 .post_unpin = mock_context_post_unpin,
192 .enter = intel_context_enter_engine,
193 .exit = intel_context_exit_engine,
195 .reset = mock_context_reset,
196 .destroy = mock_context_destroy,
199 static int mock_request_alloc(struct i915_request *request)
201 INIT_LIST_HEAD(&request->mock.link);
202 request->mock.delay = 0;
207 static int mock_emit_flush(struct i915_request *request,
213 static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs)
218 static void mock_submit_request(struct i915_request *request)
220 struct mock_engine *engine =
221 container_of(request->engine, typeof(*engine), base);
224 i915_request_submit(request);
226 spin_lock_irqsave(&engine->hw_lock, flags);
227 list_add_tail(&request->mock.link, &engine->hw_queue);
228 if (list_is_first(&request->mock.link, &engine->hw_queue)) {
229 if (request->mock.delay)
230 mod_timer(&engine->hw_delay,
231 jiffies + request->mock.delay);
235 spin_unlock_irqrestore(&engine->hw_lock, flags);
238 static void mock_reset_prepare(struct intel_engine_cs *engine)
242 static void mock_reset_rewind(struct intel_engine_cs *engine, bool stalled)
247 static void mock_reset_cancel(struct intel_engine_cs *engine)
249 struct mock_engine *mock =
250 container_of(engine, typeof(*mock), base);
251 struct i915_request *rq;
254 del_timer_sync(&mock->hw_delay);
256 spin_lock_irqsave(&engine->active.lock, flags);
258 /* Mark all submitted requests as skipped. */
259 list_for_each_entry(rq, &engine->active.requests, sched.link)
260 i915_request_put(i915_request_mark_eio(rq));
261 intel_engine_signal_breadcrumbs(engine);
263 /* Cancel and submit all pending requests. */
264 list_for_each_entry(rq, &mock->hw_queue, mock.link) {
265 if (i915_request_mark_eio(rq)) {
266 __i915_request_submit(rq);
267 i915_request_put(rq);
270 INIT_LIST_HEAD(&mock->hw_queue);
272 spin_unlock_irqrestore(&engine->active.lock, flags);
275 static void mock_reset_finish(struct intel_engine_cs *engine)
279 static void mock_engine_release(struct intel_engine_cs *engine)
281 struct mock_engine *mock =
282 container_of(engine, typeof(*mock), base);
284 GEM_BUG_ON(timer_pending(&mock->hw_delay));
286 intel_breadcrumbs_free(engine->breadcrumbs);
288 intel_context_unpin(engine->kernel_context);
289 intel_context_put(engine->kernel_context);
291 intel_engine_fini_retire(engine);
294 struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
298 struct mock_engine *engine;
300 GEM_BUG_ON(id >= I915_NUM_ENGINES);
301 GEM_BUG_ON(!i915->gt.uncore);
303 engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL);
307 /* minimal engine setup for requests */
308 engine->base.i915 = i915;
309 engine->base.gt = &i915->gt;
310 engine->base.uncore = i915->gt.uncore;
311 snprintf(engine->base.name, sizeof(engine->base.name), "%s", name);
312 engine->base.id = id;
313 engine->base.mask = BIT(id);
314 engine->base.legacy_idx = INVALID_ENGINE;
315 engine->base.instance = id;
316 engine->base.status_page.addr = (void *)(engine + 1);
318 engine->base.cops = &mock_context_ops;
319 engine->base.request_alloc = mock_request_alloc;
320 engine->base.emit_flush = mock_emit_flush;
321 engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb;
322 engine->base.submit_request = mock_submit_request;
324 engine->base.reset.prepare = mock_reset_prepare;
325 engine->base.reset.rewind = mock_reset_rewind;
326 engine->base.reset.cancel = mock_reset_cancel;
327 engine->base.reset.finish = mock_reset_finish;
329 engine->base.release = mock_engine_release;
331 i915->gt.engine[id] = &engine->base;
332 i915->gt.engine_class[0][id] = &engine->base;
335 spin_lock_init(&engine->hw_lock);
336 timer_setup(&engine->hw_delay, hw_delay_complete, 0);
337 INIT_LIST_HEAD(&engine->hw_queue);
339 intel_engine_add_user(&engine->base);
341 return &engine->base;
344 int mock_engine_init(struct intel_engine_cs *engine)
346 struct intel_context *ce;
348 intel_engine_init_active(engine, ENGINE_MOCK);
349 intel_engine_init_execlists(engine);
350 intel_engine_init__pm(engine);
351 intel_engine_init_retire(engine);
353 engine->breadcrumbs = intel_breadcrumbs_create(NULL);
354 if (!engine->breadcrumbs)
357 ce = create_kernel_context(engine);
359 goto err_breadcrumbs;
361 /* We insist the kernel context is using the status_page */
362 engine->status_page.vma = ce->timeline->hwsp_ggtt;
364 engine->kernel_context = ce;
368 intel_breadcrumbs_free(engine->breadcrumbs);
372 void mock_engine_flush(struct intel_engine_cs *engine)
374 struct mock_engine *mock =
375 container_of(engine, typeof(*mock), base);
376 struct i915_request *request, *rn;
378 del_timer_sync(&mock->hw_delay);
380 spin_lock_irq(&mock->hw_lock);
381 list_for_each_entry_safe(request, rn, &mock->hw_queue, mock.link)
383 spin_unlock_irq(&mock->hw_lock);
386 void mock_engine_reset(struct intel_engine_cs *engine)