625 lines
12 KiB
C
625 lines
12 KiB
C
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/*
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* Copyright © 2017 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 <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/prime_numbers.h>
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#include "../i915_selftest.h"
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static int __i915_sw_fence_call
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fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
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{
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switch (state) {
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case FENCE_COMPLETE:
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break;
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case FENCE_FREE:
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/* Leave the fence for the caller to free it after testing */
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break;
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}
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return NOTIFY_DONE;
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}
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static struct i915_sw_fence *alloc_fence(void)
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{
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struct i915_sw_fence *fence;
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fence = kmalloc(sizeof(*fence), GFP_KERNEL);
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if (!fence)
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return NULL;
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i915_sw_fence_init(fence, fence_notify);
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return fence;
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}
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static void free_fence(struct i915_sw_fence *fence)
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{
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i915_sw_fence_fini(fence);
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kfree(fence);
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}
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static int __test_self(struct i915_sw_fence *fence)
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{
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if (i915_sw_fence_done(fence))
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return -EINVAL;
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i915_sw_fence_commit(fence);
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if (!i915_sw_fence_done(fence))
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return -EINVAL;
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i915_sw_fence_wait(fence);
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if (!i915_sw_fence_done(fence))
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return -EINVAL;
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return 0;
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}
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static int test_self(void *arg)
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{
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struct i915_sw_fence *fence;
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int ret;
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/* Test i915_sw_fence signaling and completion testing */
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fence = alloc_fence();
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if (!fence)
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return -ENOMEM;
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ret = __test_self(fence);
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free_fence(fence);
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return ret;
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}
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static int test_dag(void *arg)
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{
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struct i915_sw_fence *A, *B, *C;
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int ret = -EINVAL;
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/* Test detection of cycles within the i915_sw_fence graphs */
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if (!IS_ENABLED(CONFIG_DRM_I915_SW_FENCE_CHECK_DAG))
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return 0;
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A = alloc_fence();
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if (!A)
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return -ENOMEM;
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if (i915_sw_fence_await_sw_fence_gfp(A, A, GFP_KERNEL) != -EINVAL) {
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pr_err("recursive cycle not detected (AA)\n");
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goto err_A;
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}
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B = alloc_fence();
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if (!B) {
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ret = -ENOMEM;
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goto err_A;
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}
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i915_sw_fence_await_sw_fence_gfp(A, B, GFP_KERNEL);
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if (i915_sw_fence_await_sw_fence_gfp(B, A, GFP_KERNEL) != -EINVAL) {
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pr_err("single depth cycle not detected (BAB)\n");
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goto err_B;
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}
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C = alloc_fence();
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if (!C) {
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ret = -ENOMEM;
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goto err_B;
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}
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if (i915_sw_fence_await_sw_fence_gfp(B, C, GFP_KERNEL) == -EINVAL) {
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pr_err("invalid cycle detected\n");
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goto err_C;
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}
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if (i915_sw_fence_await_sw_fence_gfp(C, B, GFP_KERNEL) != -EINVAL) {
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pr_err("single depth cycle not detected (CBC)\n");
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goto err_C;
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}
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if (i915_sw_fence_await_sw_fence_gfp(C, A, GFP_KERNEL) != -EINVAL) {
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pr_err("cycle not detected (BA, CB, AC)\n");
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goto err_C;
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}
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if (i915_sw_fence_await_sw_fence_gfp(A, C, GFP_KERNEL) == -EINVAL) {
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pr_err("invalid cycle detected\n");
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goto err_C;
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}
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i915_sw_fence_commit(A);
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i915_sw_fence_commit(B);
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i915_sw_fence_commit(C);
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ret = 0;
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if (!i915_sw_fence_done(C)) {
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pr_err("fence C not done\n");
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ret = -EINVAL;
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}
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if (!i915_sw_fence_done(B)) {
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pr_err("fence B not done\n");
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ret = -EINVAL;
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}
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if (!i915_sw_fence_done(A)) {
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pr_err("fence A not done\n");
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ret = -EINVAL;
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}
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err_C:
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free_fence(C);
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err_B:
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free_fence(B);
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err_A:
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free_fence(A);
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return ret;
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}
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static int test_AB(void *arg)
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{
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struct i915_sw_fence *A, *B;
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int ret;
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/* Test i915_sw_fence (A) waiting on an event source (B) */
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A = alloc_fence();
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if (!A)
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return -ENOMEM;
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B = alloc_fence();
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if (!B) {
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ret = -ENOMEM;
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goto err_A;
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}
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ret = i915_sw_fence_await_sw_fence_gfp(A, B, GFP_KERNEL);
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if (ret < 0)
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goto err_B;
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if (ret == 0) {
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pr_err("Incorrectly reported fence A was complete before await\n");
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ret = -EINVAL;
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goto err_B;
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}
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ret = -EINVAL;
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i915_sw_fence_commit(A);
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if (i915_sw_fence_done(A))
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goto err_B;
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i915_sw_fence_commit(B);
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if (!i915_sw_fence_done(B)) {
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pr_err("Fence B is not done\n");
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goto err_B;
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}
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if (!i915_sw_fence_done(A)) {
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pr_err("Fence A is not done\n");
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goto err_B;
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}
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ret = 0;
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err_B:
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free_fence(B);
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err_A:
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free_fence(A);
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return ret;
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}
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static int test_ABC(void *arg)
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{
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struct i915_sw_fence *A, *B, *C;
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int ret;
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/* Test a chain of fences, A waits on B who waits on C */
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A = alloc_fence();
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if (!A)
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return -ENOMEM;
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B = alloc_fence();
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if (!B) {
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ret = -ENOMEM;
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goto err_A;
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}
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C = alloc_fence();
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if (!C) {
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ret = -ENOMEM;
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goto err_B;
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}
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ret = i915_sw_fence_await_sw_fence_gfp(A, B, GFP_KERNEL);
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if (ret < 0)
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goto err_C;
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if (ret == 0) {
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pr_err("Incorrectly reported fence B was complete before await\n");
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goto err_C;
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}
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ret = i915_sw_fence_await_sw_fence_gfp(B, C, GFP_KERNEL);
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if (ret < 0)
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goto err_C;
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if (ret == 0) {
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pr_err("Incorrectly reported fence C was complete before await\n");
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goto err_C;
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}
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ret = -EINVAL;
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i915_sw_fence_commit(A);
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if (i915_sw_fence_done(A)) {
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pr_err("Fence A completed early\n");
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goto err_C;
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}
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i915_sw_fence_commit(B);
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if (i915_sw_fence_done(B)) {
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pr_err("Fence B completed early\n");
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goto err_C;
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}
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if (i915_sw_fence_done(A)) {
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pr_err("Fence A completed early (after signaling B)\n");
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goto err_C;
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}
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i915_sw_fence_commit(C);
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ret = 0;
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if (!i915_sw_fence_done(C)) {
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pr_err("Fence C not done\n");
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ret = -EINVAL;
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}
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if (!i915_sw_fence_done(B)) {
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pr_err("Fence B not done\n");
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ret = -EINVAL;
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}
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if (!i915_sw_fence_done(A)) {
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pr_err("Fence A not done\n");
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ret = -EINVAL;
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}
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err_C:
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free_fence(C);
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err_B:
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free_fence(B);
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err_A:
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free_fence(A);
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return ret;
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}
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static int test_AB_C(void *arg)
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{
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struct i915_sw_fence *A, *B, *C;
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int ret = -EINVAL;
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/* Test multiple fences (AB) waiting on a single event (C) */
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A = alloc_fence();
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if (!A)
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return -ENOMEM;
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B = alloc_fence();
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if (!B) {
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ret = -ENOMEM;
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goto err_A;
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}
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C = alloc_fence();
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if (!C) {
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ret = -ENOMEM;
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goto err_B;
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}
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ret = i915_sw_fence_await_sw_fence_gfp(A, C, GFP_KERNEL);
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if (ret < 0)
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goto err_C;
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if (ret == 0) {
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ret = -EINVAL;
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goto err_C;
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}
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ret = i915_sw_fence_await_sw_fence_gfp(B, C, GFP_KERNEL);
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if (ret < 0)
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goto err_C;
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if (ret == 0) {
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ret = -EINVAL;
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goto err_C;
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}
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i915_sw_fence_commit(A);
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i915_sw_fence_commit(B);
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ret = 0;
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if (i915_sw_fence_done(A)) {
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pr_err("Fence A completed early\n");
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ret = -EINVAL;
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}
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if (i915_sw_fence_done(B)) {
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pr_err("Fence B completed early\n");
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ret = -EINVAL;
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}
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i915_sw_fence_commit(C);
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if (!i915_sw_fence_done(C)) {
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pr_err("Fence C not done\n");
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ret = -EINVAL;
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}
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if (!i915_sw_fence_done(B)) {
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pr_err("Fence B not done\n");
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ret = -EINVAL;
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}
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if (!i915_sw_fence_done(A)) {
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pr_err("Fence A not done\n");
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ret = -EINVAL;
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}
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err_C:
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free_fence(C);
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err_B:
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free_fence(B);
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err_A:
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free_fence(A);
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return ret;
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}
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static int test_C_AB(void *arg)
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{
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struct i915_sw_fence *A, *B, *C;
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int ret;
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/* Test multiple event sources (A,B) for a single fence (C) */
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A = alloc_fence();
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if (!A)
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return -ENOMEM;
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B = alloc_fence();
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if (!B) {
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ret = -ENOMEM;
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goto err_A;
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}
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C = alloc_fence();
|
||
|
|
if (!C) {
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int test_timer(void *arg)
|
||
|
|
{
|
||
|
|
unsigned long target, delay;
|
||
|
|
struct timed_fence tf;
|
||
|
|
|
||
|
|
timed_fence_init(&tf, target = jiffies);
|
||
|
|
if (!i915_sw_fence_done(&tf.fence)) {
|
||
|
|
pr_err("Fence with immediate expiration not signaled\n");
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
timed_fence_fini(&tf);
|
||
|
|
|
||
|
|
for_each_prime_number(delay, i915_selftest.timeout_jiffies/2) {
|
||
|
|
timed_fence_init(&tf, target = jiffies + delay);
|
||
|
|
if (i915_sw_fence_done(&tf.fence)) {
|
||
|
|
pr_err("Fence with future expiration (%lu jiffies) already signaled\n", delay);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
i915_sw_fence_wait(&tf.fence);
|
||
|
|
if (!i915_sw_fence_done(&tf.fence)) {
|
||
|
|
pr_err("Fence not signaled after wait\n");
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
if (time_before(jiffies, target)) {
|
||
|
|
pr_err("Fence signaled too early, target=%lu, now=%lu\n",
|
||
|
|
target, jiffies);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
timed_fence_fini(&tf);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err:
|
||
|
|
timed_fence_fini(&tf);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
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),
|
||
|
|
SUBTEST(test_timer),
|
||
|
|
};
|
||
|
|
|
||
|
|
return i915_subtests(tests, NULL);
|
||
|
|
}
|