drm/i915: Import the kfence selftests for i915_sw_fence
A long time ago, I wrote some selftests for the struct kfence idea. Now that we have infrastructure in i915/igt for running kselftests, include some for i915_sw_fence. v2: INIT_WORK_ONSTACK/destroy_work_on_stack (Mika) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170517121007.27224-2-chris@chris-wilson.co.ukhifive-unleashed-5.1
Chris Wilson
parent
9310cb7f8d
commit
47624cc330
|
|
@ -61,6 +61,18 @@ config DRM_I915_SW_FENCE_DEBUG_OBJECTS
|
|||
|
||||
If in doubt, say "N".
|
||||
|
||||
config DRM_I915_SW_FENCE_CHECK_DAG
|
||||
bool "Enable additional driver debugging for detecting dependency cycles"
|
||||
depends on DRM_I915
|
||||
default n
|
||||
help
|
||||
Choose this option to turn on extra driver debugging that may affect
|
||||
performance but will catch some internal issues.
|
||||
|
||||
Recommended for driver developers only.
|
||||
|
||||
If in doubt, say "N".
|
||||
|
||||
config DRM_I915_SELFTEST
|
||||
bool "Enable selftests upon driver load"
|
||||
depends on DRM_I915
|
||||
|
|
|
|||
|
|
@ -12,6 +12,7 @@
|
|||
#include <linux/reservation.h>
|
||||
|
||||
#include "i915_sw_fence.h"
|
||||
#include "i915_selftest.h"
|
||||
|
||||
#define I915_SW_FENCE_FLAG_ALLOC BIT(3) /* after WQ_FLAG_* for safety */
|
||||
|
||||
|
|
@ -274,7 +275,7 @@ static bool i915_sw_fence_check_if_after(struct i915_sw_fence *fence,
|
|||
unsigned long flags;
|
||||
bool err;
|
||||
|
||||
if (!IS_ENABLED(CONFIG_I915_SW_FENCE_CHECK_DAG))
|
||||
if (!IS_ENABLED(CONFIG_DRM_I915_SW_FENCE_CHECK_DAG))
|
||||
return false;
|
||||
|
||||
spin_lock_irqsave(&i915_sw_fence_lock, flags);
|
||||
|
|
@ -490,3 +491,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
|
|||
|
||||
return ret;
|
||||
}
|
||||
|
||||
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
|
||||
#include "selftests/i915_sw_fence.c"
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -9,6 +9,7 @@
|
|||
* Tests are executed in order by igt/drv_selftest
|
||||
*/
|
||||
selftest(sanitycheck, i915_mock_sanitycheck) /* keep first (igt selfcheck) */
|
||||
selftest(fence, i915_sw_fence_mock_selftests)
|
||||
selftest(scatterlist, scatterlist_mock_selftests)
|
||||
selftest(syncmap, i915_syncmap_mock_selftests)
|
||||
selftest(uncore, intel_uncore_mock_selftests)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,577 @@
|
|||
/*
|
||||
* 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 <linux/completion.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
#include "../i915_selftest.h"
|
||||
|
||||
static int __i915_sw_fence_call
|
||||
fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
|
||||
{
|
||||
switch (state) {
|
||||
case FENCE_COMPLETE:
|
||||
break;
|
||||
|
||||
case FENCE_FREE:
|
||||
/* Leave the fence for the caller to free it after testing */
|
||||
break;
|
||||
}
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
static struct i915_sw_fence *alloc_fence(void)
|
||||
{
|
||||
struct i915_sw_fence *fence;
|
||||
|
||||
fence = kmalloc(sizeof(*fence), GFP_KERNEL);
|
||||
if (!fence)
|
||||
return NULL;
|
||||
|
||||
i915_sw_fence_init(fence, fence_notify);
|
||||
return fence;
|
||||
}
|
||||
|
||||
static void free_fence(struct i915_sw_fence *fence)
|
||||
{
|
||||
i915_sw_fence_fini(fence);
|
||||
kfree(fence);
|
||||
}
|
||||
|
||||
static int __test_self(struct i915_sw_fence *fence)
|
||||
{
|
||||
if (i915_sw_fence_done(fence))
|
||||
return -EINVAL;
|
||||
|
||||
i915_sw_fence_commit(fence);
|
||||
if (!i915_sw_fence_done(fence))
|
||||
return -EINVAL;
|
||||
|
||||
i915_sw_fence_wait(fence);
|
||||
if (!i915_sw_fence_done(fence))
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int test_self(void *arg)
|
||||
{
|
||||
struct i915_sw_fence *fence;
|
||||
int ret;
|
||||
|
||||
/* Test i915_sw_fence signaling and completion testing */
|
||||
fence = alloc_fence();
|
||||
if (!fence)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = __test_self(fence);
|
||||
|
||||
free_fence(fence);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int test_dag(void *arg)
|
||||
{
|
||||
struct i915_sw_fence *A, *B, *C;
|
||||
int ret = -EINVAL;
|
||||
|
||||
/* Test detection of cycles within the i915_sw_fence graphs */
|
||||
if (!IS_ENABLED(CONFIG_DRM_I915_SW_FENCE_CHECK_DAG))
|
||||
return 0;
|
||||
|
||||
A = alloc_fence();
|
||||
if (!A)
|
||||
return -ENOMEM;
|
||||
|
||||
if (i915_sw_fence_await_sw_fence_gfp(A, A, GFP_KERNEL) != -EINVAL) {
|
||||
pr_err("recursive cycle not detected (AA)\n");
|
||||
goto err_A;
|
||||
}
|
||||
|
||||
B = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_A;
|
||||
}
|
||||
|
||||
i915_sw_fence_await_sw_fence_gfp(A, B, GFP_KERNEL);
|
||||
if (i915_sw_fence_await_sw_fence_gfp(B, A, GFP_KERNEL) != -EINVAL) {
|
||||
pr_err("single depth cycle not detected (BAB)\n");
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
C = alloc_fence();
|
||||
if (i915_sw_fence_await_sw_fence_gfp(B, C, GFP_KERNEL) == -EINVAL) {
|
||||
pr_err("invalid cycle detected\n");
|
||||
goto err_C;
|
||||
}
|
||||
if (i915_sw_fence_await_sw_fence_gfp(C, B, GFP_KERNEL) != -EINVAL) {
|
||||
pr_err("single depth cycle not detected (CBC)\n");
|
||||
goto err_C;
|
||||
}
|
||||
if (i915_sw_fence_await_sw_fence_gfp(C, A, GFP_KERNEL) != -EINVAL) {
|
||||
pr_err("cycle not detected (BA, CB, AC)\n");
|
||||
goto err_C;
|
||||
}
|
||||
if (i915_sw_fence_await_sw_fence_gfp(A, C, GFP_KERNEL) == -EINVAL) {
|
||||
pr_err("invalid cycle detected\n");
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(A);
|
||||
i915_sw_fence_commit(B);
|
||||
i915_sw_fence_commit(C);
|
||||
|
||||
ret = 0;
|
||||
if (!i915_sw_fence_done(C)) {
|
||||
pr_err("fence C not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
if (!i915_sw_fence_done(B)) {
|
||||
pr_err("fence B not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
if (!i915_sw_fence_done(A)) {
|
||||
pr_err("fence A not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
err_C:
|
||||
free_fence(C);
|
||||
err_B:
|
||||
free_fence(B);
|
||||
err_A:
|
||||
free_fence(A);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int test_AB(void *arg)
|
||||
{
|
||||
struct i915_sw_fence *A, *B;
|
||||
int ret;
|
||||
|
||||
/* Test i915_sw_fence (A) waiting on an event source (B) */
|
||||
A = alloc_fence();
|
||||
if (!A)
|
||||
return -ENOMEM;
|
||||
B = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_A;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(A, B, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_B;
|
||||
if (ret == 0) {
|
||||
pr_err("Incorrectly reported fence A was complete before await\n");
|
||||
ret = -EINVAL;
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
ret = -EINVAL;
|
||||
i915_sw_fence_commit(A);
|
||||
if (i915_sw_fence_done(A))
|
||||
goto err_B;
|
||||
|
||||
i915_sw_fence_commit(B);
|
||||
if (!i915_sw_fence_done(B)) {
|
||||
pr_err("Fence B is not done\n");
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
if (!i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A is not done\n");
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
err_B:
|
||||
free_fence(B);
|
||||
err_A:
|
||||
free_fence(A);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int test_ABC(void *arg)
|
||||
{
|
||||
struct i915_sw_fence *A, *B, *C;
|
||||
int ret;
|
||||
|
||||
/* Test a chain of fences, A waits on B who waits on C */
|
||||
A = alloc_fence();
|
||||
if (!A)
|
||||
return -ENOMEM;
|
||||
|
||||
B = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_A;
|
||||
}
|
||||
|
||||
C = alloc_fence();
|
||||
if (!C) {
|
||||
ret = -ENOMEM;
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(A, B, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_C;
|
||||
if (ret == 0) {
|
||||
pr_err("Incorrectly reported fence B was complete before await\n");
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(B, C, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_C;
|
||||
if (ret == 0) {
|
||||
pr_err("Incorrectly reported fence C was complete before await\n");
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
ret = -EINVAL;
|
||||
i915_sw_fence_commit(A);
|
||||
if (i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A completed early\n");
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(B);
|
||||
if (i915_sw_fence_done(B)) {
|
||||
pr_err("Fence B completed early\n");
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
if (i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A completed early (after signaling B)\n");
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(C);
|
||||
|
||||
ret = 0;
|
||||
if (!i915_sw_fence_done(C)) {
|
||||
pr_err("Fence C not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
if (!i915_sw_fence_done(B)) {
|
||||
pr_err("Fence B not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
if (!i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
err_C:
|
||||
free_fence(C);
|
||||
err_B:
|
||||
free_fence(B);
|
||||
err_A:
|
||||
free_fence(A);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int test_AB_C(void *arg)
|
||||
{
|
||||
struct i915_sw_fence *A, *B, *C;
|
||||
int ret = -EINVAL;
|
||||
|
||||
/* Test multiple fences (AB) waiting on a single event (C) */
|
||||
A = alloc_fence();
|
||||
if (!A)
|
||||
return -ENOMEM;
|
||||
|
||||
B = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_A;
|
||||
}
|
||||
|
||||
C = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(A, C, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_C;
|
||||
if (ret == 0) {
|
||||
ret = -EINVAL;
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(B, C, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_C;
|
||||
if (ret == 0) {
|
||||
ret = -EINVAL;
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(A);
|
||||
i915_sw_fence_commit(B);
|
||||
|
||||
ret = 0;
|
||||
if (i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A completed early\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
if (i915_sw_fence_done(B)) {
|
||||
pr_err("Fence B completed early\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(C);
|
||||
if (!i915_sw_fence_done(C)) {
|
||||
pr_err("Fence C not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
if (!i915_sw_fence_done(B)) {
|
||||
pr_err("Fence B not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
if (!i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
err_C:
|
||||
free_fence(C);
|
||||
err_B:
|
||||
free_fence(B);
|
||||
err_A:
|
||||
free_fence(A);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int test_C_AB(void *arg)
|
||||
{
|
||||
struct i915_sw_fence *A, *B, *C;
|
||||
int ret;
|
||||
|
||||
/* Test multiple event sources (A,B) for a single fence (C) */
|
||||
A = alloc_fence();
|
||||
if (!A)
|
||||
return -ENOMEM;
|
||||
|
||||
B = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_A;
|
||||
}
|
||||
|
||||
C = alloc_fence();
|
||||
if (!B) {
|
||||
ret = -ENOMEM;
|
||||
goto err_B;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(C, A, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_C;
|
||||
if (ret == 0) {
|
||||
ret = -EINVAL;
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(C, B, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto err_C;
|
||||
if (ret == 0) {
|
||||
ret = -EINVAL;
|
||||
goto err_C;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
i915_sw_fence_commit(C);
|
||||
if (i915_sw_fence_done(C))
|
||||
ret = -EINVAL;
|
||||
|
||||
i915_sw_fence_commit(A);
|
||||
i915_sw_fence_commit(B);
|
||||
|
||||
if (!i915_sw_fence_done(A)) {
|
||||
pr_err("Fence A not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
if (!i915_sw_fence_done(B)) {
|
||||
pr_err("Fence B not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
if (!i915_sw_fence_done(C)) {
|
||||
pr_err("Fence C not done\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
err_C:
|
||||
free_fence(C);
|
||||
err_B:
|
||||
free_fence(B);
|
||||
err_A:
|
||||
free_fence(A);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int test_chain(void *arg)
|
||||
{
|
||||
int nfences = 4096;
|
||||
struct i915_sw_fence **fences;
|
||||
int ret, i;
|
||||
|
||||
/* Test a long chain of fences */
|
||||
fences = kmalloc_array(nfences, sizeof(*fences), GFP_KERNEL);
|
||||
if (!fences)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < nfences; i++) {
|
||||
fences[i] = alloc_fence();
|
||||
if (!fences[i]) {
|
||||
nfences = i;
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (i > 0) {
|
||||
ret = i915_sw_fence_await_sw_fence_gfp(fences[i],
|
||||
fences[i - 1],
|
||||
GFP_KERNEL);
|
||||
if (ret < 0) {
|
||||
nfences = i + 1;
|
||||
goto err;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(fences[i]);
|
||||
}
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
for (i = nfences; --i; ) {
|
||||
if (i915_sw_fence_done(fences[i])) {
|
||||
if (ret == 0)
|
||||
pr_err("Fence[%d] completed early\n", i);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
}
|
||||
i915_sw_fence_commit(fences[0]);
|
||||
for (i = 0; ret == 0 && i < nfences; i++) {
|
||||
if (!i915_sw_fence_done(fences[i])) {
|
||||
pr_err("Fence[%d] is not done\n", i);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
for (i = 0; i < nfences; i++)
|
||||
free_fence(fences[i]);
|
||||
kfree(fences);
|
||||
return ret;
|
||||
}
|
||||
|
||||
struct task_ipc {
|
||||
struct work_struct work;
|
||||
struct completion started;
|
||||
struct i915_sw_fence *in, *out;
|
||||
int value;
|
||||
};
|
||||
|
||||
static void task_ipc(struct work_struct *work)
|
||||
{
|
||||
struct task_ipc *ipc = container_of(work, typeof(*ipc), work);
|
||||
|
||||
complete(&ipc->started);
|
||||
|
||||
i915_sw_fence_wait(ipc->in);
|
||||
smp_store_mb(ipc->value, 1);
|
||||
i915_sw_fence_commit(ipc->out);
|
||||
}
|
||||
|
||||
static int test_ipc(void *arg)
|
||||
{
|
||||
struct task_ipc ipc;
|
||||
int ret = 0;
|
||||
|
||||
/* Test use of i915_sw_fence as an interprocess signaling mechanism */
|
||||
ipc.in = alloc_fence();
|
||||
if (!ipc.in)
|
||||
return -ENOMEM;
|
||||
ipc.out = alloc_fence();
|
||||
if (!ipc.out) {
|
||||
ret = -ENOMEM;
|
||||
goto err_in;
|
||||
}
|
||||
|
||||
/* use a completion to avoid chicken-and-egg testing */
|
||||
init_completion(&ipc.started);
|
||||
|
||||
ipc.value = 0;
|
||||
INIT_WORK_ONSTACK(&ipc.work, task_ipc);
|
||||
schedule_work(&ipc.work);
|
||||
|
||||
wait_for_completion(&ipc.started);
|
||||
|
||||
usleep_range(1000, 2000);
|
||||
if (READ_ONCE(ipc.value)) {
|
||||
pr_err("worker updated value before i915_sw_fence was signaled\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
i915_sw_fence_commit(ipc.in);
|
||||
i915_sw_fence_wait(ipc.out);
|
||||
|
||||
if (!READ_ONCE(ipc.value)) {
|
||||
pr_err("worker signaled i915_sw_fence before value was posted\n");
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
flush_work(&ipc.work);
|
||||
destroy_work_on_stack(&ipc.work);
|
||||
free_fence(ipc.out);
|
||||
err_in:
|
||||
free_fence(ipc.in);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int i915_sw_fence_mock_selftests(void)
|
||||
{
|
||||
static const struct i915_subtest tests[] = {
|
||||
SUBTEST(test_self),
|
||||
SUBTEST(test_dag),
|
||||
SUBTEST(test_AB),
|
||||
SUBTEST(test_ABC),
|
||||
SUBTEST(test_AB_C),
|
||||
SUBTEST(test_C_AB),
|
||||
SUBTEST(test_chain),
|
||||
SUBTEST(test_ipc),
|
||||
};
|
||||
|
||||
return i915_subtests(tests, NULL);
|
||||
}
|
||||
Loading…
Reference in New Issue