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/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#include "mock_engine.h"
#include "mock_request.h"
static struct mock_request *first_request(struct mock_engine *engine)
{
return list_first_entry_or_null(&engine->hw_queue,
struct mock_request,
link);
}
static void hw_delay_complete(unsigned long data)
{
struct mock_engine *engine = (typeof(engine))data;
struct mock_request *request;
spin_lock(&engine->hw_lock);
request = first_request(engine);
if (request) {
list_del_init(&request->link);
mock_seqno_advance(&engine->base, request->base.global_seqno);
}
request = first_request(engine);
if (request)
mod_timer(&engine->hw_delay, jiffies + request->delay);
spin_unlock(&engine->hw_lock);
}
static int mock_context_pin(struct intel_engine_cs *engine,
struct i915_gem_context *ctx)
{
i915_gem_context_get(ctx);
return 0;
}
static void mock_context_unpin(struct intel_engine_cs *engine,
struct i915_gem_context *ctx)
{
i915_gem_context_put(ctx);
}
static int mock_request_alloc(struct drm_i915_gem_request *request)
{
struct mock_request *mock = container_of(request, typeof(*mock), base);
INIT_LIST_HEAD(&mock->link);
mock->delay = 0;
request->ring = request->engine->buffer;
return 0;
}
static int mock_emit_flush(struct drm_i915_gem_request *request,
unsigned int flags)
{
return 0;
}
static void mock_emit_breadcrumb(struct drm_i915_gem_request *request,
u32 *flags)
{
}
static void mock_submit_request(struct drm_i915_gem_request *request)
{
struct mock_request *mock = container_of(request, typeof(*mock), base);
struct mock_engine *engine =
container_of(request->engine, typeof(*engine), base);
i915_gem_request_submit(request);
GEM_BUG_ON(!request->global_seqno);
spin_lock_irq(&engine->hw_lock);
list_add_tail(&mock->link, &engine->hw_queue);
if (mock->link.prev == &engine->hw_queue)
mod_timer(&engine->hw_delay, jiffies + mock->delay);
spin_unlock_irq(&engine->hw_lock);
}
static struct intel_ring *mock_ring(struct intel_engine_cs *engine)
{
const unsigned long sz = roundup_pow_of_two(sizeof(struct intel_ring));
struct intel_ring *ring;
ring = kzalloc(sizeof(*ring) + sz, GFP_KERNEL);
if (!ring)
return NULL;
ring->engine = engine;
ring->size = sz;
ring->effective_size = sz;
ring->vaddr = (void *)(ring + 1);
INIT_LIST_HEAD(&ring->request_list);
intel_ring_update_space(ring);
return ring;
}
struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
const char *name)
{
struct mock_engine *engine;
static int id;
engine = kzalloc(sizeof(*engine) + PAGE_SIZE, GFP_KERNEL);
if (!engine)
return NULL;
engine->base.buffer = mock_ring(&engine->base);
if (!engine->base.buffer) {
kfree(engine);
return NULL;
}
/* minimal engine setup for requests */
engine->base.i915 = i915;
engine->base.name = name;
engine->base.id = id++;
engine->base.status_page.page_addr = (void *)(engine + 1);
engine->base.context_pin = mock_context_pin;
engine->base.context_unpin = mock_context_unpin;
engine->base.request_alloc = mock_request_alloc;
engine->base.emit_flush = mock_emit_flush;
engine->base.emit_breadcrumb = mock_emit_breadcrumb;
engine->base.submit_request = mock_submit_request;
engine->base.timeline =
&i915->gt.global_timeline.engine[engine->base.id];
intel_engine_init_breadcrumbs(&engine->base);
engine->base.breadcrumbs.mock = true; /* prevent touching HW for irqs */
/* fake hw queue */
spin_lock_init(&engine->hw_lock);
setup_timer(&engine->hw_delay,
hw_delay_complete,
(unsigned long)engine);
INIT_LIST_HEAD(&engine->hw_queue);
return &engine->base;
}
void mock_engine_flush(struct intel_engine_cs *engine)
{
struct mock_engine *mock =
container_of(engine, typeof(*mock), base);
struct mock_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, link) {
list_del_init(&request->link);
mock_seqno_advance(&mock->base, request->base.global_seqno);
}
spin_unlock_irq(&mock->hw_lock);
}
void mock_engine_reset(struct intel_engine_cs *engine)
{
intel_write_status_page(engine, I915_GEM_HWS_INDEX, 0);
}
void mock_engine_free(struct intel_engine_cs *engine)
{
struct mock_engine *mock =
container_of(engine, typeof(*mock), base);
GEM_BUG_ON(timer_pending(&mock->hw_delay));
if (engine->last_retired_context)
engine->context_unpin(engine, engine->last_retired_context);
intel_engine_fini_breadcrumbs(engine);
kfree(engine->buffer);
kfree(engine);
}
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