446 lines
10 KiB
C
446 lines
10 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2016 Intel Corporation
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*/
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#include "gem/i915_gem_context.h"
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#include "gt/intel_ring.h"
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#include "i915_drv.h"
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#include "intel_context.h"
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#include "intel_engine_pm.h"
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#include "mock_engine.h"
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#include "selftests/mock_request.h"
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static int mock_timeline_pin(struct intel_timeline *tl)
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{
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int err;
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if (WARN_ON(!i915_gem_object_trylock(tl->hwsp_ggtt->obj, NULL)))
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return -EBUSY;
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err = intel_timeline_pin_map(tl);
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i915_gem_object_unlock(tl->hwsp_ggtt->obj);
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if (err)
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return err;
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atomic_inc(&tl->pin_count);
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return 0;
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}
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static void mock_timeline_unpin(struct intel_timeline *tl)
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{
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GEM_BUG_ON(!atomic_read(&tl->pin_count));
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atomic_dec(&tl->pin_count);
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}
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static struct i915_vma *create_ring_vma(struct i915_ggtt *ggtt, int size)
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{
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struct i915_address_space *vm = &ggtt->vm;
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struct drm_i915_private *i915 = vm->i915;
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struct drm_i915_gem_object *obj;
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struct i915_vma *vma;
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obj = i915_gem_object_create_internal(i915, size);
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if (IS_ERR(obj))
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return ERR_CAST(obj);
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vma = i915_vma_instance(obj, vm, NULL);
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if (IS_ERR(vma))
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goto err;
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return vma;
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err:
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i915_gem_object_put(obj);
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return vma;
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}
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static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
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{
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const unsigned long sz = PAGE_SIZE;
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struct intel_ring *ring;
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ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
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if (!ring)
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return NULL;
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kref_init(&ring->ref);
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ring->size = sz;
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ring->effective_size = sz;
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ring->vaddr = (void *)(ring + 1);
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atomic_set(&ring->pin_count, 1);
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ring->vma = create_ring_vma(engine->gt->ggtt, PAGE_SIZE);
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if (IS_ERR(ring->vma)) {
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kfree(ring);
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return NULL;
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}
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intel_ring_update_space(ring);
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return ring;
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}
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static void mock_ring_free(struct intel_ring *ring)
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{
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i915_vma_put(ring->vma);
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kfree(ring);
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}
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static struct i915_request *first_request(struct mock_engine *engine)
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{
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return list_first_entry_or_null(&engine->hw_queue,
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struct i915_request,
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mock.link);
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}
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static void advance(struct i915_request *request)
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{
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list_del_init(&request->mock.link);
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i915_request_mark_complete(request);
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GEM_BUG_ON(!i915_request_completed(request));
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intel_engine_signal_breadcrumbs(request->engine);
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}
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static void hw_delay_complete(struct timer_list *t)
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{
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struct mock_engine *engine = from_timer(engine, t, hw_delay);
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struct i915_request *request;
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unsigned long flags;
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spin_lock_irqsave(&engine->hw_lock, flags);
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/* Timer fired, first request is complete */
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request = first_request(engine);
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if (request)
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advance(request);
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/*
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* Also immediately signal any subsequent 0-delay requests, but
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* requeue the timer for the next delayed request.
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*/
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while ((request = first_request(engine))) {
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if (request->mock.delay) {
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mod_timer(&engine->hw_delay,
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jiffies + request->mock.delay);
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break;
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}
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advance(request);
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}
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spin_unlock_irqrestore(&engine->hw_lock, flags);
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}
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static void mock_context_unpin(struct intel_context *ce)
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{
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}
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static void mock_context_post_unpin(struct intel_context *ce)
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{
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i915_vma_unpin(ce->ring->vma);
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}
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static void mock_context_destroy(struct kref *ref)
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{
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struct intel_context *ce = container_of(ref, typeof(*ce), ref);
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GEM_BUG_ON(intel_context_is_pinned(ce));
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if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) {
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mock_ring_free(ce->ring);
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mock_timeline_unpin(ce->timeline);
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}
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intel_context_fini(ce);
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intel_context_free(ce);
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}
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static int mock_context_alloc(struct intel_context *ce)
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{
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int err;
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ce->ring = mock_ring(ce->engine);
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if (!ce->ring)
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return -ENOMEM;
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ce->timeline = intel_timeline_create(ce->engine->gt);
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if (IS_ERR(ce->timeline)) {
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kfree(ce->engine);
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return PTR_ERR(ce->timeline);
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}
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err = mock_timeline_pin(ce->timeline);
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if (err) {
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intel_timeline_put(ce->timeline);
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ce->timeline = NULL;
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return err;
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}
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return 0;
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}
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static int mock_context_pre_pin(struct intel_context *ce,
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struct i915_gem_ww_ctx *ww, void **unused)
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{
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return i915_vma_pin_ww(ce->ring->vma, ww, 0, 0, PIN_GLOBAL | PIN_HIGH);
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}
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static int mock_context_pin(struct intel_context *ce, void *unused)
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{
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return 0;
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}
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static void mock_context_reset(struct intel_context *ce)
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{
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}
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static const struct intel_context_ops mock_context_ops = {
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.alloc = mock_context_alloc,
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.pre_pin = mock_context_pre_pin,
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.pin = mock_context_pin,
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.unpin = mock_context_unpin,
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.post_unpin = mock_context_post_unpin,
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.enter = intel_context_enter_engine,
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.exit = intel_context_exit_engine,
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.reset = mock_context_reset,
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.destroy = mock_context_destroy,
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};
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static int mock_request_alloc(struct i915_request *request)
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{
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INIT_LIST_HEAD(&request->mock.link);
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request->mock.delay = 0;
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return 0;
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}
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static int mock_emit_flush(struct i915_request *request,
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unsigned int flags)
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{
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return 0;
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}
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static u32 *mock_emit_breadcrumb(struct i915_request *request, u32 *cs)
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{
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return cs;
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}
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static void mock_submit_request(struct i915_request *request)
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{
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struct mock_engine *engine =
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container_of(request->engine, typeof(*engine), base);
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unsigned long flags;
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i915_request_submit(request);
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spin_lock_irqsave(&engine->hw_lock, flags);
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list_add_tail(&request->mock.link, &engine->hw_queue);
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if (list_is_first(&request->mock.link, &engine->hw_queue)) {
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if (request->mock.delay)
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mod_timer(&engine->hw_delay,
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jiffies + request->mock.delay);
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else
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advance(request);
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}
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spin_unlock_irqrestore(&engine->hw_lock, flags);
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}
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static void mock_add_to_engine(struct i915_request *rq)
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{
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lockdep_assert_held(&rq->engine->sched_engine->lock);
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list_move_tail(&rq->sched.link, &rq->engine->sched_engine->requests);
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}
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static void mock_remove_from_engine(struct i915_request *rq)
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{
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struct intel_engine_cs *engine, *locked;
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/*
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* Virtual engines complicate acquiring the engine timeline lock,
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* as their rq->engine pointer is not stable until under that
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* engine lock. The simple ploy we use is to take the lock then
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* check that the rq still belongs to the newly locked engine.
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*/
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locked = READ_ONCE(rq->engine);
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spin_lock_irq(&locked->sched_engine->lock);
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while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
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spin_unlock(&locked->sched_engine->lock);
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spin_lock(&engine->sched_engine->lock);
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locked = engine;
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}
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list_del_init(&rq->sched.link);
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spin_unlock_irq(&locked->sched_engine->lock);
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}
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static void mock_reset_prepare(struct intel_engine_cs *engine)
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{
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}
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static void mock_reset_rewind(struct intel_engine_cs *engine, bool stalled)
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{
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GEM_BUG_ON(stalled);
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}
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static void mock_reset_cancel(struct intel_engine_cs *engine)
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{
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struct mock_engine *mock =
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container_of(engine, typeof(*mock), base);
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struct i915_request *rq;
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unsigned long flags;
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del_timer_sync(&mock->hw_delay);
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spin_lock_irqsave(&engine->sched_engine->lock, flags);
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/* Mark all submitted requests as skipped. */
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list_for_each_entry(rq, &engine->sched_engine->requests, sched.link)
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i915_request_put(i915_request_mark_eio(rq));
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intel_engine_signal_breadcrumbs(engine);
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/* Cancel and submit all pending requests. */
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list_for_each_entry(rq, &mock->hw_queue, mock.link) {
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if (i915_request_mark_eio(rq)) {
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__i915_request_submit(rq);
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i915_request_put(rq);
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}
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}
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INIT_LIST_HEAD(&mock->hw_queue);
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spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
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}
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static void mock_reset_finish(struct intel_engine_cs *engine)
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{
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}
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static void mock_engine_release(struct intel_engine_cs *engine)
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{
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struct mock_engine *mock =
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container_of(engine, typeof(*mock), base);
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GEM_BUG_ON(timer_pending(&mock->hw_delay));
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i915_sched_engine_put(engine->sched_engine);
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intel_breadcrumbs_put(engine->breadcrumbs);
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intel_context_unpin(engine->kernel_context);
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intel_context_put(engine->kernel_context);
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intel_engine_fini_retire(engine);
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}
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struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
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const char *name,
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int id)
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{
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struct mock_engine *engine;
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GEM_BUG_ON(id >= I915_NUM_ENGINES);
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GEM_BUG_ON(!to_gt(i915)->uncore);
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engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL);
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if (!engine)
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return NULL;
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/* minimal engine setup for requests */
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engine->base.i915 = i915;
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engine->base.gt = to_gt(i915);
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engine->base.uncore = to_gt(i915)->uncore;
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snprintf(engine->base.name, sizeof(engine->base.name), "%s", name);
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engine->base.id = id;
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engine->base.mask = BIT(id);
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engine->base.legacy_idx = INVALID_ENGINE;
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engine->base.instance = id;
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engine->base.status_page.addr = (void *)(engine + 1);
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engine->base.cops = &mock_context_ops;
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engine->base.request_alloc = mock_request_alloc;
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engine->base.emit_flush = mock_emit_flush;
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engine->base.emit_fini_breadcrumb = mock_emit_breadcrumb;
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engine->base.submit_request = mock_submit_request;
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engine->base.add_active_request = mock_add_to_engine;
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engine->base.remove_active_request = mock_remove_from_engine;
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engine->base.reset.prepare = mock_reset_prepare;
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engine->base.reset.rewind = mock_reset_rewind;
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engine->base.reset.cancel = mock_reset_cancel;
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engine->base.reset.finish = mock_reset_finish;
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engine->base.release = mock_engine_release;
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to_gt(i915)->engine[id] = &engine->base;
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to_gt(i915)->engine_class[0][id] = &engine->base;
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/* fake hw queue */
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spin_lock_init(&engine->hw_lock);
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timer_setup(&engine->hw_delay, hw_delay_complete, 0);
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INIT_LIST_HEAD(&engine->hw_queue);
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intel_engine_add_user(&engine->base);
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return &engine->base;
|
||
|
|
}
|
||
|
|
|
||
|
|
int mock_engine_init(struct intel_engine_cs *engine)
|
||
|
|
{
|
||
|
|
struct intel_context *ce;
|
||
|
|
|
||
|
|
INIT_LIST_HEAD(&engine->pinned_contexts_list);
|
||
|
|
|
||
|
|
engine->sched_engine = i915_sched_engine_create(ENGINE_MOCK);
|
||
|
|
if (!engine->sched_engine)
|
||
|
|
return -ENOMEM;
|
||
|
|
engine->sched_engine->private_data = engine;
|
||
|
|
|
||
|
|
intel_engine_init_execlists(engine);
|
||
|
|
intel_engine_init__pm(engine);
|
||
|
|
intel_engine_init_retire(engine);
|
||
|
|
|
||
|
|
engine->breadcrumbs = intel_breadcrumbs_create(NULL);
|
||
|
|
if (!engine->breadcrumbs)
|
||
|
|
goto err_schedule;
|
||
|
|
|
||
|
|
ce = create_kernel_context(engine);
|
||
|
|
if (IS_ERR(ce))
|
||
|
|
goto err_breadcrumbs;
|
||
|
|
|
||
|
|
/* We insist the kernel context is using the status_page */
|
||
|
|
engine->status_page.vma = ce->timeline->hwsp_ggtt;
|
||
|
|
|
||
|
|
engine->kernel_context = ce;
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_breadcrumbs:
|
||
|
|
intel_breadcrumbs_put(engine->breadcrumbs);
|
||
|
|
err_schedule:
|
||
|
|
i915_sched_engine_put(engine->sched_engine);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
void mock_engine_flush(struct intel_engine_cs *engine)
|
||
|
|
{
|
||
|
|
struct mock_engine *mock =
|
||
|
|
container_of(engine, typeof(*mock), base);
|
||
|
|
struct i915_request *request, *rn;
|
||
|
|
|
||
|
|
del_timer_sync(&mock->hw_delay);
|
||
|
|
|
||
|
|
spin_lock_irq(&mock->hw_lock);
|
||
|
|
list_for_each_entry_safe(request, rn, &mock->hw_queue, mock.link)
|
||
|
|
advance(request);
|
||
|
|
spin_unlock_irq(&mock->hw_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
void mock_engine_reset(struct intel_engine_cs *engine)
|
||
|
|
{
|
||
|
|
}
|