758 lines
14 KiB
C
758 lines
14 KiB
C
/*
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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
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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();
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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(C, A, 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(C, 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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ret = -EINVAL;
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goto err_C;
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}
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ret = 0;
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i915_sw_fence_commit(C);
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if (i915_sw_fence_done(C))
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ret = -EINVAL;
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i915_sw_fence_commit(A);
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i915_sw_fence_commit(B);
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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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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(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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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_chain(void *arg)
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{
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int nfences = 4096;
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struct i915_sw_fence **fences;
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int ret, i;
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/* Test a long chain of fences */
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fences = kmalloc_array(nfences, sizeof(*fences), GFP_KERNEL);
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if (!fences)
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return -ENOMEM;
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for (i = 0; i < nfences; i++) {
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fences[i] = alloc_fence();
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if (!fences[i]) {
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nfences = i;
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ret = -ENOMEM;
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goto err;
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}
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if (i > 0) {
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ret = i915_sw_fence_await_sw_fence_gfp(fences[i],
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fences[i - 1],
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GFP_KERNEL);
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if (ret < 0) {
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nfences = i + 1;
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goto err;
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}
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i915_sw_fence_commit(fences[i]);
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}
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}
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ret = 0;
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for (i = nfences; --i; ) {
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if (i915_sw_fence_done(fences[i])) {
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if (ret == 0)
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pr_err("Fence[%d] completed early\n", i);
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ret = -EINVAL;
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}
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}
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i915_sw_fence_commit(fences[0]);
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for (i = 0; ret == 0 && i < nfences; i++) {
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if (!i915_sw_fence_done(fences[i])) {
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pr_err("Fence[%d] is not done\n", i);
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ret = -EINVAL;
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}
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}
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err:
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for (i = 0; i < nfences; i++)
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free_fence(fences[i]);
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kfree(fences);
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return ret;
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}
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struct task_ipc {
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struct work_struct work;
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struct completion started;
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struct i915_sw_fence *in, *out;
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int value;
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};
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static void task_ipc(struct work_struct *work)
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{
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struct task_ipc *ipc = container_of(work, typeof(*ipc), work);
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complete(&ipc->started);
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i915_sw_fence_wait(ipc->in);
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smp_store_mb(ipc->value, 1);
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i915_sw_fence_commit(ipc->out);
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}
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static int test_ipc(void *arg)
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{
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struct task_ipc ipc;
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int ret = 0;
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/* Test use of i915_sw_fence as an interprocess signaling mechanism */
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ipc.in = alloc_fence();
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if (!ipc.in)
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return -ENOMEM;
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ipc.out = alloc_fence();
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if (!ipc.out) {
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ret = -ENOMEM;
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goto err_in;
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}
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/* use a completion to avoid chicken-and-egg testing */
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init_completion(&ipc.started);
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ipc.value = 0;
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INIT_WORK_ONSTACK(&ipc.work, task_ipc);
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schedule_work(&ipc.work);
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wait_for_completion(&ipc.started);
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usleep_range(1000, 2000);
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if (READ_ONCE(ipc.value)) {
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pr_err("worker updated value before i915_sw_fence was signaled\n");
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ret = -EINVAL;
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}
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i915_sw_fence_commit(ipc.in);
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i915_sw_fence_wait(ipc.out);
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if (!READ_ONCE(ipc.value)) {
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pr_err("worker signaled i915_sw_fence before value was posted\n");
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ret = -EINVAL;
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}
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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;
|
|
|
|
preempt_disable();
|
|
timed_fence_init(&tf, target = jiffies);
|
|
if (!i915_sw_fence_done(&tf.fence)) {
|
|
pr_err("Fence with immediate expiration not signaled\n");
|
|
goto err;
|
|
}
|
|
preempt_enable();
|
|
timed_fence_fini(&tf);
|
|
|
|
for_each_prime_number(delay, i915_selftest.timeout_jiffies/2) {
|
|
preempt_disable();
|
|
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;
|
|
}
|
|
preempt_enable();
|
|
|
|
i915_sw_fence_wait(&tf.fence);
|
|
|
|
preempt_disable();
|
|
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;
|
|
}
|
|
preempt_enable();
|
|
timed_fence_fini(&tf);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
preempt_enable();
|
|
timed_fence_fini(&tf);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const char *mock_name(struct dma_fence *fence)
|
|
{
|
|
return "mock";
|
|
}
|
|
|
|
static const struct dma_fence_ops mock_fence_ops = {
|
|
.get_driver_name = mock_name,
|
|
.get_timeline_name = mock_name,
|
|
};
|
|
|
|
static DEFINE_SPINLOCK(mock_fence_lock);
|
|
|
|
static struct dma_fence *alloc_dma_fence(void)
|
|
{
|
|
struct dma_fence *dma;
|
|
|
|
dma = kmalloc(sizeof(*dma), GFP_KERNEL);
|
|
if (dma)
|
|
dma_fence_init(dma, &mock_fence_ops, &mock_fence_lock, 0, 0);
|
|
|
|
return dma;
|
|
}
|
|
|
|
static struct i915_sw_fence *
|
|
wrap_dma_fence(struct dma_fence *dma, unsigned long delay)
|
|
{
|
|
struct i915_sw_fence *fence;
|
|
int err;
|
|
|
|
fence = alloc_fence();
|
|
if (!fence)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
err = i915_sw_fence_await_dma_fence(fence, dma, delay, GFP_NOWAIT);
|
|
i915_sw_fence_commit(fence);
|
|
if (err < 0) {
|
|
free_fence(fence);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
return fence;
|
|
}
|
|
|
|
static int test_dma_fence(void *arg)
|
|
{
|
|
struct i915_sw_fence *timeout = NULL, *not = NULL;
|
|
unsigned long delay = i915_selftest.timeout_jiffies;
|
|
unsigned long end, sleep;
|
|
struct dma_fence *dma;
|
|
int err;
|
|
|
|
dma = alloc_dma_fence();
|
|
if (!dma)
|
|
return -ENOMEM;
|
|
|
|
timeout = wrap_dma_fence(dma, delay);
|
|
if (IS_ERR(timeout)) {
|
|
err = PTR_ERR(timeout);
|
|
goto err;
|
|
}
|
|
|
|
not = wrap_dma_fence(dma, 0);
|
|
if (IS_ERR(not)) {
|
|
err = PTR_ERR(not);
|
|
goto err;
|
|
}
|
|
|
|
err = -EINVAL;
|
|
if (i915_sw_fence_done(timeout) || i915_sw_fence_done(not)) {
|
|
pr_err("Fences immediately signaled\n");
|
|
goto err;
|
|
}
|
|
|
|
/* We round the timeout for the fence up to the next second */
|
|
end = round_jiffies_up(jiffies + delay);
|
|
|
|
sleep = jiffies_to_usecs(delay) / 3;
|
|
usleep_range(sleep, 2 * sleep);
|
|
if (time_after(jiffies, end)) {
|
|
pr_debug("Slept too long, delay=%lu, (target=%lu, now=%lu) skipping\n",
|
|
delay, end, jiffies);
|
|
goto skip;
|
|
}
|
|
|
|
if (i915_sw_fence_done(timeout) || i915_sw_fence_done(not)) {
|
|
pr_err("Fences signaled too early\n");
|
|
goto err;
|
|
}
|
|
|
|
if (!wait_event_timeout(timeout->wait,
|
|
i915_sw_fence_done(timeout),
|
|
2 * (end - jiffies) + 1)) {
|
|
pr_err("Timeout fence unsignaled!\n");
|
|
goto err;
|
|
}
|
|
|
|
if (i915_sw_fence_done(not)) {
|
|
pr_err("No timeout fence signaled!\n");
|
|
goto err;
|
|
}
|
|
|
|
skip:
|
|
dma_fence_signal(dma);
|
|
|
|
if (!i915_sw_fence_done(timeout) || !i915_sw_fence_done(not)) {
|
|
pr_err("Fences unsignaled\n");
|
|
goto err;
|
|
}
|
|
|
|
free_fence(not);
|
|
free_fence(timeout);
|
|
dma_fence_put(dma);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
dma_fence_signal(dma);
|
|
if (!IS_ERR_OR_NULL(timeout))
|
|
free_fence(timeout);
|
|
if (!IS_ERR_OR_NULL(not))
|
|
free_fence(not);
|
|
dma_fence_put(dma);
|
|
return err;
|
|
}
|
|
|
|
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),
|
|
SUBTEST(test_dma_fence),
|
|
};
|
|
|
|
return i915_subtests(tests, NULL);
|
|
}
|