OpenCloudOS-Kernel/drivers/gpu/drm/i915/selftests/i915_gem_context.c

480 lines
11 KiB
C

/*
* Copyright © 2017 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 "../i915_selftest.h"
#include "igt_flush_test.h"
#include "mock_drm.h"
#include "huge_gem_object.h"
#define DW_PER_PAGE (PAGE_SIZE / sizeof(u32))
static struct i915_vma *
gpu_fill_dw(struct i915_vma *vma, u64 offset, unsigned long count, u32 value)
{
struct drm_i915_gem_object *obj;
const int gen = INTEL_GEN(vma->vm->i915);
unsigned long n, size;
u32 *cmd;
int err;
size = (4 * count + 1) * sizeof(u32);
size = round_up(size, PAGE_SIZE);
obj = i915_gem_object_create_internal(vma->vm->i915, size);
if (IS_ERR(obj))
return ERR_CAST(obj);
cmd = i915_gem_object_pin_map(obj, I915_MAP_WB);
if (IS_ERR(cmd)) {
err = PTR_ERR(cmd);
goto err;
}
GEM_BUG_ON(offset + (count - 1) * PAGE_SIZE > vma->node.size);
offset += vma->node.start;
for (n = 0; n < count; n++) {
if (gen >= 8) {
*cmd++ = MI_STORE_DWORD_IMM_GEN4;
*cmd++ = lower_32_bits(offset);
*cmd++ = upper_32_bits(offset);
*cmd++ = value;
} else if (gen >= 4) {
*cmd++ = MI_STORE_DWORD_IMM_GEN4 |
(gen < 6 ? 1 << 22 : 0);
*cmd++ = 0;
*cmd++ = offset;
*cmd++ = value;
} else {
*cmd++ = MI_STORE_DWORD_IMM | 1 << 22;
*cmd++ = offset;
*cmd++ = value;
}
offset += PAGE_SIZE;
}
*cmd = MI_BATCH_BUFFER_END;
i915_gem_object_unpin_map(obj);
err = i915_gem_object_set_to_gtt_domain(obj, false);
if (err)
goto err;
vma = i915_vma_instance(obj, vma->vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto err;
}
err = i915_vma_pin(vma, 0, 0, PIN_USER);
if (err)
goto err;
return vma;
err:
i915_gem_object_put(obj);
return ERR_PTR(err);
}
static unsigned long real_page_count(struct drm_i915_gem_object *obj)
{
return huge_gem_object_phys_size(obj) >> PAGE_SHIFT;
}
static unsigned long fake_page_count(struct drm_i915_gem_object *obj)
{
return huge_gem_object_dma_size(obj) >> PAGE_SHIFT;
}
static int gpu_fill(struct drm_i915_gem_object *obj,
struct i915_gem_context *ctx,
struct intel_engine_cs *engine,
unsigned int dw)
{
struct drm_i915_private *i915 = to_i915(obj->base.dev);
struct i915_address_space *vm =
ctx->ppgtt ? &ctx->ppgtt->base : &i915->ggtt.base;
struct i915_request *rq;
struct i915_vma *vma;
struct i915_vma *batch;
unsigned int flags;
int err;
GEM_BUG_ON(obj->base.size > vm->total);
GEM_BUG_ON(!intel_engine_can_store_dword(engine));
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma))
return PTR_ERR(vma);
err = i915_gem_object_set_to_gtt_domain(obj, false);
if (err)
return err;
err = i915_vma_pin(vma, 0, 0, PIN_HIGH | PIN_USER);
if (err)
return err;
/* Within the GTT the huge objects maps every page onto
* its 1024 real pages (using phys_pfn = dma_pfn % 1024).
* We set the nth dword within the page using the nth
* mapping via the GTT - this should exercise the GTT mapping
* whilst checking that each context provides a unique view
* into the object.
*/
batch = gpu_fill_dw(vma,
(dw * real_page_count(obj)) << PAGE_SHIFT |
(dw * sizeof(u32)),
real_page_count(obj),
dw);
if (IS_ERR(batch)) {
err = PTR_ERR(batch);
goto err_vma;
}
rq = i915_request_alloc(engine, ctx);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto err_batch;
}
flags = 0;
if (INTEL_GEN(vm->i915) <= 5)
flags |= I915_DISPATCH_SECURE;
err = engine->emit_bb_start(rq,
batch->node.start, batch->node.size,
flags);
if (err)
goto err_request;
i915_vma_move_to_active(batch, rq, 0);
i915_gem_object_set_active_reference(batch->obj);
i915_vma_unpin(batch);
i915_vma_close(batch);
i915_vma_move_to_active(vma, rq, 0);
i915_vma_unpin(vma);
reservation_object_lock(obj->resv, NULL);
reservation_object_add_excl_fence(obj->resv, &rq->fence);
reservation_object_unlock(obj->resv);
__i915_request_add(rq, true);
return 0;
err_request:
__i915_request_add(rq, false);
err_batch:
i915_vma_unpin(batch);
err_vma:
i915_vma_unpin(vma);
return err;
}
static int cpu_fill(struct drm_i915_gem_object *obj, u32 value)
{
const bool has_llc = HAS_LLC(to_i915(obj->base.dev));
unsigned int n, m, need_flush;
int err;
err = i915_gem_obj_prepare_shmem_write(obj, &need_flush);
if (err)
return err;
for (n = 0; n < real_page_count(obj); n++) {
u32 *map;
map = kmap_atomic(i915_gem_object_get_page(obj, n));
for (m = 0; m < DW_PER_PAGE; m++)
map[m] = value;
if (!has_llc)
drm_clflush_virt_range(map, PAGE_SIZE);
kunmap_atomic(map);
}
i915_gem_obj_finish_shmem_access(obj);
obj->read_domains = I915_GEM_DOMAIN_GTT | I915_GEM_DOMAIN_CPU;
obj->write_domain = 0;
return 0;
}
static int cpu_check(struct drm_i915_gem_object *obj, unsigned int max)
{
unsigned int n, m, needs_flush;
int err;
err = i915_gem_obj_prepare_shmem_read(obj, &needs_flush);
if (err)
return err;
for (n = 0; n < real_page_count(obj); n++) {
u32 *map;
map = kmap_atomic(i915_gem_object_get_page(obj, n));
if (needs_flush & CLFLUSH_BEFORE)
drm_clflush_virt_range(map, PAGE_SIZE);
for (m = 0; m < max; m++) {
if (map[m] != m) {
pr_err("Invalid value at page %d, offset %d: found %x expected %x\n",
n, m, map[m], m);
err = -EINVAL;
goto out_unmap;
}
}
for (; m < DW_PER_PAGE; m++) {
if (map[m] != 0xdeadbeef) {
pr_err("Invalid value at page %d, offset %d: found %x expected %x\n",
n, m, map[m], 0xdeadbeef);
err = -EINVAL;
goto out_unmap;
}
}
out_unmap:
kunmap_atomic(map);
if (err)
break;
}
i915_gem_obj_finish_shmem_access(obj);
return err;
}
static int file_add_object(struct drm_file *file,
struct drm_i915_gem_object *obj)
{
int err;
GEM_BUG_ON(obj->base.handle_count);
/* tie the object to the drm_file for easy reaping */
err = idr_alloc(&file->object_idr, &obj->base, 1, 0, GFP_KERNEL);
if (err < 0)
return err;
i915_gem_object_get(obj);
obj->base.handle_count++;
return 0;
}
static struct drm_i915_gem_object *
create_test_object(struct i915_gem_context *ctx,
struct drm_file *file,
struct list_head *objects)
{
struct drm_i915_gem_object *obj;
struct i915_address_space *vm =
ctx->ppgtt ? &ctx->ppgtt->base : &ctx->i915->ggtt.base;
u64 size;
int err;
size = min(vm->total / 2, 1024ull * DW_PER_PAGE * PAGE_SIZE);
size = round_down(size, DW_PER_PAGE * PAGE_SIZE);
obj = huge_gem_object(ctx->i915, DW_PER_PAGE * PAGE_SIZE, size);
if (IS_ERR(obj))
return obj;
err = file_add_object(file, obj);
i915_gem_object_put(obj);
if (err)
return ERR_PTR(err);
err = cpu_fill(obj, 0xdeadbeef);
if (err) {
pr_err("Failed to fill object with cpu, err=%d\n",
err);
return ERR_PTR(err);
}
list_add_tail(&obj->st_link, objects);
return obj;
}
static unsigned long max_dwords(struct drm_i915_gem_object *obj)
{
unsigned long npages = fake_page_count(obj);
GEM_BUG_ON(!IS_ALIGNED(npages, DW_PER_PAGE));
return npages / DW_PER_PAGE;
}
static int igt_ctx_exec(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj = NULL;
struct drm_file *file;
IGT_TIMEOUT(end_time);
LIST_HEAD(objects);
unsigned long ncontexts, ndwords, dw;
bool first_shared_gtt = true;
int err = -ENODEV;
/* Create a few different contexts (with different mm) and write
* through each ctx/mm using the GPU making sure those writes end
* up in the expected pages of our obj.
*/
file = mock_file(i915);
if (IS_ERR(file))
return PTR_ERR(file);
mutex_lock(&i915->drm.struct_mutex);
ncontexts = 0;
ndwords = 0;
dw = 0;
while (!time_after(jiffies, end_time)) {
struct intel_engine_cs *engine;
struct i915_gem_context *ctx;
unsigned int id;
if (first_shared_gtt) {
ctx = __create_hw_context(i915, file->driver_priv);
first_shared_gtt = false;
} else {
ctx = i915_gem_create_context(i915, file->driver_priv);
}
if (IS_ERR(ctx)) {
err = PTR_ERR(ctx);
goto out_unlock;
}
for_each_engine(engine, i915, id) {
if (!intel_engine_can_store_dword(engine))
continue;
if (!obj) {
obj = create_test_object(ctx, file, &objects);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out_unlock;
}
}
intel_runtime_pm_get(i915);
err = gpu_fill(obj, ctx, engine, dw);
intel_runtime_pm_put(i915);
if (err) {
pr_err("Failed to fill dword %lu [%lu/%lu] with gpu (%s) in ctx %u [full-ppgtt? %s], err=%d\n",
ndwords, dw, max_dwords(obj),
engine->name, ctx->hw_id,
yesno(!!ctx->ppgtt), err);
goto out_unlock;
}
if (++dw == max_dwords(obj)) {
obj = NULL;
dw = 0;
}
ndwords++;
}
ncontexts++;
}
pr_info("Submitted %lu contexts (across %u engines), filling %lu dwords\n",
ncontexts, INTEL_INFO(i915)->num_rings, ndwords);
dw = 0;
list_for_each_entry(obj, &objects, st_link) {
unsigned int rem =
min_t(unsigned int, ndwords - dw, max_dwords(obj));
err = cpu_check(obj, rem);
if (err)
break;
dw += rem;
}
out_unlock:
if (igt_flush_test(i915, I915_WAIT_LOCKED))
err = -EIO;
mutex_unlock(&i915->drm.struct_mutex);
mock_file_free(i915, file);
return err;
}
static int fake_aliasing_ppgtt_enable(struct drm_i915_private *i915)
{
struct drm_i915_gem_object *obj;
int err;
err = i915_gem_init_aliasing_ppgtt(i915);
if (err)
return err;
list_for_each_entry(obj, &i915->mm.bound_list, mm.link) {
struct i915_vma *vma;
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma))
continue;
vma->flags &= ~I915_VMA_LOCAL_BIND;
}
return 0;
}
static void fake_aliasing_ppgtt_disable(struct drm_i915_private *i915)
{
i915_gem_fini_aliasing_ppgtt(i915);
}
int i915_gem_context_live_selftests(struct drm_i915_private *dev_priv)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_ctx_exec),
};
bool fake_alias = false;
int err;
/* Install a fake aliasing gtt for exercise */
if (USES_PPGTT(dev_priv) && !dev_priv->mm.aliasing_ppgtt) {
mutex_lock(&dev_priv->drm.struct_mutex);
err = fake_aliasing_ppgtt_enable(dev_priv);
mutex_unlock(&dev_priv->drm.struct_mutex);
if (err)
return err;
GEM_BUG_ON(!dev_priv->mm.aliasing_ppgtt);
fake_alias = true;
}
err = i915_subtests(tests, dev_priv);
if (fake_alias) {
mutex_lock(&dev_priv->drm.struct_mutex);
fake_aliasing_ppgtt_disable(dev_priv);
mutex_unlock(&dev_priv->drm.struct_mutex);
}
return err;
}