mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 09:56:11 +07:00
e1a73a54a9
Instead of tediously and fragilely counting up the number of dwords required to emit the breadcrumb to seal a request, fake a request and measure it automatically once during engine setup. The downside is that this requires a fair amount of mocking to create a proper breadcrumb. Still, should be less error prone in future as the breadcrumb size fluctuates! Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190125100520.20163-1-chris@chris-wilson.co.uk
271 lines
6.8 KiB
C
271 lines
6.8 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include "mock_engine.h"
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#include "mock_request.h"
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struct mock_ring {
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struct intel_ring base;
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struct i915_timeline timeline;
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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 / 2;
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struct mock_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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i915_timeline_init(engine->i915, &ring->timeline, engine->name);
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ring->base.size = sz;
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ring->base.effective_size = sz;
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ring->base.vaddr = (void *)(ring + 1);
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ring->base.timeline = &ring->timeline;
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INIT_LIST_HEAD(&ring->base.request_list);
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intel_ring_update_space(&ring->base);
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return &ring->base;
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}
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static void mock_ring_free(struct intel_ring *base)
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{
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struct mock_ring *ring = container_of(base, typeof(*ring), base);
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i915_timeline_fini(&ring->timeline);
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kfree(ring);
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}
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static struct mock_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 mock_request,
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link);
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}
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static void advance(struct mock_request *request)
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{
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list_del_init(&request->link);
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mock_seqno_advance(request->base.engine, request->base.global_seqno);
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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 mock_request *request;
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spin_lock(&engine->hw_lock);
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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->delay) {
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mod_timer(&engine->hw_delay, jiffies + request->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(&engine->hw_lock);
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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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i915_gem_context_put(ce->gem_context);
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}
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static void mock_context_destroy(struct intel_context *ce)
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{
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GEM_BUG_ON(ce->pin_count);
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if (ce->ring)
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mock_ring_free(ce->ring);
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}
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static const struct intel_context_ops mock_context_ops = {
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.unpin = mock_context_unpin,
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.destroy = mock_context_destroy,
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};
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static struct intel_context *
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mock_context_pin(struct intel_engine_cs *engine,
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struct i915_gem_context *ctx)
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{
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struct intel_context *ce = to_intel_context(ctx, engine);
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if (ce->pin_count++)
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return ce;
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if (!ce->ring) {
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ce->ring = mock_ring(engine);
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if (!ce->ring)
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goto err;
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}
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ce->ops = &mock_context_ops;
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i915_gem_context_get(ctx);
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return ce;
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err:
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ce->pin_count = 0;
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return ERR_PTR(-ENOMEM);
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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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struct mock_request *mock = container_of(request, typeof(*mock), base);
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INIT_LIST_HEAD(&mock->link);
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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_request *mock = container_of(request, typeof(*mock), base);
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struct mock_engine *engine =
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container_of(request->engine, typeof(*engine), base);
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i915_request_submit(request);
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GEM_BUG_ON(!request->global_seqno);
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spin_lock_irq(&engine->hw_lock);
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list_add_tail(&mock->link, &engine->hw_queue);
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if (mock->link.prev == &engine->hw_queue) {
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if (mock->delay)
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mod_timer(&engine->hw_delay, jiffies + mock->delay);
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else
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advance(mock);
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}
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spin_unlock_irq(&engine->hw_lock);
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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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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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snprintf(engine->base.name, sizeof(engine->base.name), "%s", name);
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engine->base.id = id;
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engine->base.status_page.page_addr = (void *)(engine + 1);
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engine->base.context_pin = mock_context_pin;
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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_breadcrumb = mock_emit_breadcrumb;
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engine->base.submit_request = mock_submit_request;
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i915_timeline_init(i915, &engine->base.timeline, engine->base.name);
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i915_timeline_set_subclass(&engine->base.timeline, TIMELINE_ENGINE);
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intel_engine_init_breadcrumbs(&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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if (IS_ERR(intel_context_pin(i915->kernel_context, &engine->base)))
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goto err_breadcrumbs;
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return &engine->base;
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err_breadcrumbs:
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intel_engine_fini_breadcrumbs(&engine->base);
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i915_timeline_fini(&engine->base.timeline);
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kfree(engine);
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return NULL;
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}
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void mock_engine_flush(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 mock_request *request, *rn;
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del_timer_sync(&mock->hw_delay);
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spin_lock_irq(&mock->hw_lock);
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list_for_each_entry_safe(request, rn, &mock->hw_queue, link)
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advance(request);
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spin_unlock_irq(&mock->hw_lock);
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}
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void mock_engine_reset(struct intel_engine_cs *engine)
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{
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intel_write_status_page(engine, I915_GEM_HWS_INDEX, 0);
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}
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void mock_engine_free(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 intel_context *ce;
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GEM_BUG_ON(timer_pending(&mock->hw_delay));
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ce = fetch_and_zero(&engine->last_retired_context);
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if (ce)
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intel_context_unpin(ce);
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__intel_context_unpin(engine->i915->kernel_context, engine);
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intel_engine_fini_breadcrumbs(engine);
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i915_timeline_fini(&engine->timeline);
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kfree(engine);
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}
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