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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 "gem/i915_gem_pm.h"
#include "gem/selftests/igt_gem_utils.h"
#include "gem/selftests/mock_context.h"
#include "i915_selftest.h"
#include "lib_sw_fence.h"
#include "mock_drm.h"
#include "mock_gem_device.h"
static void quirk_add(struct drm_i915_gem_object *obj,
struct list_head *objects)
{
/* quirk is only for live tiled objects, use it to declare ownership */
GEM_BUG_ON(obj->mm.quirked);
obj->mm.quirked = true;
list_add(&obj->st_link, objects);
}
static int populate_ggtt(struct drm_i915_private *i915,
struct list_head *objects)
{
unsigned long unbound, bound, count;
struct drm_i915_gem_object *obj;
u64 size;
count = 0;
for (size = 0;
size + I915_GTT_PAGE_SIZE <= i915->ggtt.vm.total;
size += I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
quirk_add(obj, objects);
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
if (IS_ERR(vma))
return PTR_ERR(vma);
count++;
}
unbound = 0;
list_for_each_entry(obj, &i915->mm.unbound_list, mm.link)
if (obj->mm.quirked)
unbound++;
if (unbound) {
pr_err("%s: Found %lu objects unbound, expected %u!\n",
__func__, unbound, 0);
return -EINVAL;
}
bound = 0;
list_for_each_entry(obj, &i915->mm.bound_list, mm.link)
if (obj->mm.quirked)
bound++;
if (bound != count) {
pr_err("%s: Found %lu objects bound, expected %lu!\n",
__func__, bound, count);
return -EINVAL;
}
if (list_empty(&i915->ggtt.vm.bound_list)) {
pr_err("No objects on the GGTT inactive list!\n");
return -EINVAL;
}
return 0;
}
static void unpin_ggtt(struct drm_i915_private *i915)
{
struct i915_ggtt *ggtt = &i915->ggtt;
struct i915_vma *vma;
mutex_lock(&ggtt->vm.mutex);
list_for_each_entry(vma, &i915->ggtt.vm.bound_list, vm_link)
if (vma->obj->mm.quirked)
i915_vma_unpin(vma);
mutex_unlock(&ggtt->vm.mutex);
}
static void cleanup_objects(struct drm_i915_private *i915,
struct list_head *list)
{
struct drm_i915_gem_object *obj, *on;
list_for_each_entry_safe(obj, on, list, st_link) {
GEM_BUG_ON(!obj->mm.quirked);
obj->mm.quirked = false;
i915_gem_object_put(obj);
}
mutex_unlock(&i915->drm.struct_mutex);
i915_gem_drain_freed_objects(i915);
mutex_lock(&i915->drm.struct_mutex);
}
static int igt_evict_something(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_ggtt *ggtt = &i915->ggtt;
LIST_HEAD(objects);
int err;
/* Fill the GGTT with pinned objects and try to evict one. */
err = populate_ggtt(i915, &objects);
if (err)
goto cleanup;
/* Everything is pinned, nothing should happen */
err = i915_gem_evict_something(&ggtt->vm,
I915_GTT_PAGE_SIZE, 0, 0,
0, U64_MAX,
0);
if (err != -ENOSPC) {
pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
err);
goto cleanup;
}
unpin_ggtt(i915);
/* Everything is unpinned, we should be able to evict something */
err = i915_gem_evict_something(&ggtt->vm,
I915_GTT_PAGE_SIZE, 0, 0,
0, U64_MAX,
0);
if (err) {
pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
err);
goto cleanup;
}
cleanup:
cleanup_objects(i915, &objects);
return err;
}
static int igt_overcommit(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
LIST_HEAD(objects);
int err;
/* Fill the GGTT with pinned objects and then try to pin one more.
* We expect it to fail.
*/
err = populate_ggtt(i915, &objects);
if (err)
goto cleanup;
obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto cleanup;
}
quirk_add(obj, &objects);
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
if (!IS_ERR(vma) || PTR_ERR(vma) != -ENOSPC) {
pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR(vma));
err = -EINVAL;
goto cleanup;
}
cleanup:
cleanup_objects(i915, &objects);
return err;
}
static int igt_evict_for_vma(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_ggtt *ggtt = &i915->ggtt;
struct drm_mm_node target = {
.start = 0,
.size = 4096,
};
LIST_HEAD(objects);
int err;
/* Fill the GGTT with pinned objects and try to evict a range. */
err = populate_ggtt(i915, &objects);
if (err)
goto cleanup;
/* Everything is pinned, nothing should happen */
err = i915_gem_evict_for_node(&ggtt->vm, &target, 0);
if (err != -ENOSPC) {
pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n",
err);
goto cleanup;
}
unpin_ggtt(i915);
/* Everything is unpinned, we should be able to evict the node */
err = i915_gem_evict_for_node(&ggtt->vm, &target, 0);
if (err) {
pr_err("i915_gem_evict_for_node returned err=%d\n",
err);
goto cleanup;
}
cleanup:
cleanup_objects(i915, &objects);
return err;
}
static void mock_color_adjust(const struct drm_mm_node *node,
unsigned long color,
u64 *start,
u64 *end)
{
}
static int igt_evict_for_cache_color(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_ggtt *ggtt = &i915->ggtt;
const unsigned long flags = PIN_OFFSET_FIXED;
struct drm_mm_node target = {
.start = I915_GTT_PAGE_SIZE * 2,
.size = I915_GTT_PAGE_SIZE,
.color = I915_CACHE_LLC,
};
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
LIST_HEAD(objects);
int err;
/* Currently the use of color_adjust is limited to cache domains within
* the ggtt, and so the presence of mm.color_adjust is assumed to be
* i915_gtt_color_adjust throughout our driver, so using a mock color
* adjust will work just fine for our purposes.
*/
ggtt->vm.mm.color_adjust = mock_color_adjust;
obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto cleanup;
}
i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
quirk_add(obj, &objects);
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
I915_GTT_PAGE_SIZE | flags);
if (IS_ERR(vma)) {
pr_err("[0]i915_gem_object_ggtt_pin failed\n");
err = PTR_ERR(vma);
goto cleanup;
}
obj = i915_gem_object_create_internal(i915, I915_GTT_PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto cleanup;
}
i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
quirk_add(obj, &objects);
/* Neighbouring; same colour - should fit */
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
(I915_GTT_PAGE_SIZE * 2) | flags);
if (IS_ERR(vma)) {
pr_err("[1]i915_gem_object_ggtt_pin failed\n");
err = PTR_ERR(vma);
goto cleanup;
}
i915_vma_unpin(vma);
/* Remove just the second vma */
err = i915_gem_evict_for_node(&ggtt->vm, &target, 0);
if (err) {
pr_err("[0]i915_gem_evict_for_node returned err=%d\n", err);
goto cleanup;
}
/* Attempt to remove the first *pinned* vma, by removing the (empty)
* neighbour -- this should fail.
*/
target.color = I915_CACHE_L3_LLC;
err = i915_gem_evict_for_node(&ggtt->vm, &target, 0);
if (!err) {
pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err);
err = -EINVAL;
goto cleanup;
}
err = 0;
cleanup:
unpin_ggtt(i915);
cleanup_objects(i915, &objects);
ggtt->vm.mm.color_adjust = NULL;
return err;
}
static int igt_evict_vm(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_ggtt *ggtt = &i915->ggtt;
LIST_HEAD(objects);
int err;
/* Fill the GGTT with pinned objects and try to evict everything. */
err = populate_ggtt(i915, &objects);
if (err)
goto cleanup;
/* Everything is pinned, nothing should happen */
err = i915_gem_evict_vm(&ggtt->vm);
if (err) {
pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
err);
goto cleanup;
}
unpin_ggtt(i915);
err = i915_gem_evict_vm(&ggtt->vm);
if (err) {
pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
err);
goto cleanup;
}
cleanup:
cleanup_objects(i915, &objects);
return err;
}
static int igt_evict_contexts(void *arg)
{
const u64 PRETEND_GGTT_SIZE = 16ull << 20;
struct drm_i915_private *i915 = arg;
struct intel_engine_cs *engine;
enum intel_engine_id id;
struct reserved {
struct drm_mm_node node;
struct reserved *next;
} *reserved = NULL;
intel_wakeref_t wakeref;
struct drm_mm_node hole;
unsigned long count;
int err;
/*
* The purpose of this test is to verify that we will trigger an
* eviction in the GGTT when constructing a request that requires
* additional space in the GGTT for pinning the context. This space
* is not directly tied to the request so reclaiming it requires
* extra work.
*
* As such this test is only meaningful for full-ppgtt environments
* where the GTT space of the request is separate from the GGTT
* allocation required to build the request.
*/
if (!HAS_FULL_PPGTT(i915))
return 0;
mutex_lock(&i915->drm.struct_mutex);
wakeref = intel_runtime_pm_get(i915);
/* Reserve a block so that we know we have enough to fit a few rq */
memset(&hole, 0, sizeof(hole));
err = i915_gem_gtt_insert(&i915->ggtt.vm, &hole,
PRETEND_GGTT_SIZE, 0, I915_COLOR_UNEVICTABLE,
0, i915->ggtt.vm.total,
PIN_NOEVICT);
if (err)
goto out_locked;
/* Make the GGTT appear small by filling it with unevictable nodes */
count = 0;
do {
struct reserved *r;
r = kcalloc(1, sizeof(*r), GFP_KERNEL);
if (!r) {
err = -ENOMEM;
goto out_locked;
}
if (i915_gem_gtt_insert(&i915->ggtt.vm, &r->node,
1ul << 20, 0, I915_COLOR_UNEVICTABLE,
0, i915->ggtt.vm.total,
PIN_NOEVICT)) {
kfree(r);
break;
}
r->next = reserved;
reserved = r;
count++;
} while (1);
drm_mm_remove_node(&hole);
mutex_unlock(&i915->drm.struct_mutex);
pr_info("Filled GGTT with %lu 1MiB nodes\n", count);
/* Overfill the GGTT with context objects and so try to evict one. */
for_each_engine(engine, i915, id) {
struct i915_sw_fence fence;
struct drm_file *file;
file = mock_file(i915);
if (IS_ERR(file)) {
err = PTR_ERR(file);
break;
}
count = 0;
mutex_lock(&i915->drm.struct_mutex);
onstack_fence_init(&fence);
do {
struct i915_request *rq;
struct i915_gem_context *ctx;
ctx = live_context(i915, file);
if (IS_ERR(ctx))
break;
/* We will need some GGTT space for the rq's context */
igt_evict_ctl.fail_if_busy = true;
rq = igt_request_alloc(ctx, engine);
igt_evict_ctl.fail_if_busy = false;
if (IS_ERR(rq)) {
/* When full, fail_if_busy will trigger EBUSY */
if (PTR_ERR(rq) != -EBUSY) {
pr_err("Unexpected error from request alloc (ctx hw id %u, on %s): %d\n",
ctx->hw_id, engine->name,
(int)PTR_ERR(rq));
err = PTR_ERR(rq);
}
break;
}
/* Keep every request/ctx pinned until we are full */
err = i915_sw_fence_await_sw_fence_gfp(&rq->submit,
&fence,
GFP_KERNEL);
if (err < 0)
break;
i915_request_add(rq);
count++;
err = 0;
} while(1);
mutex_unlock(&i915->drm.struct_mutex);
onstack_fence_fini(&fence);
pr_info("Submitted %lu contexts/requests on %s\n",
count, engine->name);
mock_file_free(i915, file);
if (err)
break;
}
mutex_lock(&i915->drm.struct_mutex);
out_locked:
while (reserved) {
struct reserved *next = reserved->next;
drm_mm_remove_node(&reserved->node);
kfree(reserved);
reserved = next;
}
if (drm_mm_node_allocated(&hole))
drm_mm_remove_node(&hole);
intel_runtime_pm_put(i915, wakeref);
mutex_unlock(&i915->drm.struct_mutex);
return err;
}
int i915_gem_evict_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_evict_something),
SUBTEST(igt_evict_for_vma),
SUBTEST(igt_evict_for_cache_color),
SUBTEST(igt_evict_vm),
SUBTEST(igt_overcommit),
};
struct drm_i915_private *i915;
intel_wakeref_t wakeref;
int err = 0;
i915 = mock_gem_device();
if (!i915)
return -ENOMEM;
mutex_lock(&i915->drm.struct_mutex);
with_intel_runtime_pm(i915, wakeref)
err = i915_subtests(tests, i915);
mutex_unlock(&i915->drm.struct_mutex);
drm_dev_put(&i915->drm);
return err;
}
int i915_gem_evict_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_evict_contexts),
};
if (i915_terminally_wedged(i915))
return 0;
return i915_subtests(tests, i915);
}
|