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git://nv-tegra.nvidia.com/linux-nvgpu.git
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Open source GPL/LGPL release
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svcmobrel-release
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/*
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* Copyright (c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
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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 shall be included in
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* all copies or substantial portions of the 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
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <unit/unit.h>
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#include <unit/io.h>
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#include <nvgpu/dma.h>
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#include <nvgpu/nvgpu_mem.h>
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#include <nvgpu/posix/posix-fault-injection.h>
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#include "posix-fault-injection-dma-alloc.h"
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#define TEST_DEFAULT_SIZE 4096
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static struct nvgpu_posix_fault_inj *dma_fi;
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/*
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* Used to make sure fault injection is disabled before running test
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* If already enabled, prints warning and disables
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*
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* Returns false if unable to guarantee fault injection is disabled
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*/
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static bool verify_fi_disabled(struct unit_module *m)
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{
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if (nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_info(m, "Unexpected fault injection enabled\n");
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}
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/* force disabled in case it was in "delay" mode */
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nvgpu_posix_enable_fault_injection(dma_fi, false, 0);
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if (nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_err(m, "Unable to disable fault injection\n");
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return false;
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}
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return true;
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}
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int test_dma_alloc_init(struct unit_module *m,
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struct gk20a *g, void *__args)
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{
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dma_fi = nvgpu_dma_alloc_get_fault_injection();
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if (dma_fi == NULL) {
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return UNIT_FAIL;
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} else {
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return UNIT_SUCCESS;
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}
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}
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int test_dma_alloc_fi_default(struct unit_module *m,
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struct gk20a *g, void *__args)
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{
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struct nvgpu_mem mem = { };
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int result;
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int ret = UNIT_SUCCESS;
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if (!verify_fi_disabled(m)) {
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ret = UNIT_FAIL;
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/* no reason to go on */
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goto test_exit;
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}
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/* check default case, no fault injection */
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result = nvgpu_dma_alloc(g, TEST_DEFAULT_SIZE, &mem);
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if (result != 0) {
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unit_err(m, "nvgpu_dma_alloc returned error when fault "
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"injection disabled\n");
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ret = UNIT_FAIL;
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}
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/* good housekeeping */
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nvgpu_dma_free(g, &mem);
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test_exit:
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/* disable faults upon exit */
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nvgpu_posix_enable_fault_injection(dma_fi, false, 0);
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if (nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_err(m, "unable to disable fault injection\n");
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ret = UNIT_FAIL;
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}
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if (ret != UNIT_SUCCESS) {
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unit_return_fail(m, "dma alloc fault injection test "
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"failure\n");
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}
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return ret;
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}
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int test_dma_alloc_fi_enabled(struct unit_module *m,
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struct gk20a *g, void *__args)
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{
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struct nvgpu_mem mem = { };
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int result;
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int ret = UNIT_SUCCESS;
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if (!verify_fi_disabled(m)) {
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ret = UNIT_FAIL;
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/* no reason to go on */
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goto test_exit;
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}
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/* enable fault injection immediately */
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nvgpu_posix_enable_fault_injection(dma_fi, true, 0);
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if (!nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_err(m, "unable to enable fault injection\n");
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ret = UNIT_FAIL;
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goto test_exit;
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}
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result = nvgpu_dma_alloc(g, TEST_DEFAULT_SIZE, &mem);
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if (result == 0) {
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unit_err(m, "nvgpu_dma_alloc returned success when fault "
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"injection enabled\n");
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nvgpu_dma_free(g, &mem);
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ret = UNIT_FAIL;
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}
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test_exit:
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/* disable faults upon exit */
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nvgpu_posix_enable_fault_injection(dma_fi, false, 0);
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if (nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_err(m, "unable to disable fault injection\n");
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ret = UNIT_FAIL;
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}
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if (ret != UNIT_SUCCESS) {
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unit_return_fail(m, "dma alloc fault injection test "
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"failure\n");
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}
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return ret;
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}
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int test_dma_alloc_fi_delayed_enable(struct unit_module *m,
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struct gk20a *g, void *__args)
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{
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#define FAIL_AFTER 2
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unsigned int call_count = 0;
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struct nvgpu_mem mem[FAIL_AFTER+1] = { };
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int result = 0;
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int ret = UNIT_SUCCESS;
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if (!verify_fi_disabled(m)) {
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ret = UNIT_FAIL;
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/* no reason to go on */
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goto test_exit;
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}
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/* enable fault injection after delay */
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nvgpu_posix_enable_fault_injection(dma_fi, true, FAIL_AFTER);
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if (nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_err(m, "Fault injection errantly enabled too soon\n");
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ret = UNIT_FAIL;
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goto test_exit;
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}
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call_count = 1;
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while (call_count <= (FAIL_AFTER+1)) {
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result = nvgpu_dma_alloc(g, TEST_DEFAULT_SIZE,
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&mem[call_count-1]);
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if ((call_count <= FAIL_AFTER) && (result != 0U)) {
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unit_err(m, "nvgpu_dma_alloc returned error when fault "
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"injection disabled\n");
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ret = UNIT_FAIL;
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/* no reason to go on */
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break;
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} else if ((call_count > FAIL_AFTER) && (result == 0U)) {
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unit_err(m, "nvgpu_dma_alloc returned success when "
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"fault injection enabled\n");
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ret = UNIT_FAIL;
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/* no reason to go on */
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break;
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}
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call_count++;
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}
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test_exit:
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/* free allocations */
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if (result != 0) {
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/* the last alloc failed, so decrement before we start
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* freeing
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*/
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call_count--;
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}
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while (call_count > 1) {
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nvgpu_dma_free(g, &mem[call_count-1]);
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call_count--;
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}
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/* disable faults upon exit */
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nvgpu_posix_enable_fault_injection(dma_fi, false, 0);
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if (nvgpu_posix_is_fault_injection_triggered(dma_fi)) {
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unit_err(m, "unable to disable fault injection\n");
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ret = UNIT_FAIL;
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}
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if (ret != UNIT_SUCCESS) {
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unit_return_fail(m, "dma alloc fault injection test "
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"failure\n");
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}
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return ret;
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}
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