Re: [PATCH] igt/gem_workaround: Add test to verify workarounds

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2014-08-14 13:51 GMT-03:00  <arun.siluvery@xxxxxxxxxxxxxxx>:
> From: Arun Siluvery <arun.siluvery@xxxxxxxxxxxxxxx>
>
> This patch adds a new test to verify applied workarounds before
> and after an operation such as gpu reset, suspend/resume.
>
> It is a simple test which captures w/a state at the beginning and
> compares their status with the state after the operation.
>
> v2: w/a table is removed from igt as driver exports it via debugfs file.

It would be good if you could also add a test to check if the
woarkarounds survive runtime PM.

>
> Signed-off-by: Arun Siluvery <arun.siluvery@xxxxxxxxxxxxxxx>
> ---
>  tests/Makefile.sources  |   1 +
>  tests/gem_workarounds.c | 252 ++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 253 insertions(+)
>  create mode 100644 tests/gem_workarounds.c
>
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index 0eb9369..e16e22a 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -62,6 +62,7 @@ TESTS_progs_M = \
>         gem_tiled_partial_pwrite_pread \
>         gem_userptr_blits \
>         gem_write_read_ring_switch \
> +       gem_workarounds \
>         kms_addfb \
>         kms_cursor_crc \
>         kms_fbc_crc \
> diff --git a/tests/gem_workarounds.c b/tests/gem_workarounds.c
> new file mode 100644
> index 0000000..cac1027
> --- /dev/null
> +++ b/tests/gem_workarounds.c
> @@ -0,0 +1,252 @@
> +/*
> + * Copyright © 2014 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.
> + *
> + * Authors:
> + *  Arun Siluvery <arun.siluvery@xxxxxxxxxxxxxxx>
> + *
> + */
> +
> +#define _GNU_SOURCE
> +#include <stdbool.h>
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <fcntl.h>
> +#include <inttypes.h>
> +#include <errno.h>
> +#include <sys/stat.h>
> +#include <sys/ioctl.h>
> +#include <sys/mman.h>
> +#include <time.h>
> +#include <signal.h>
> +
> +#include "ioctl_wrappers.h"
> +#include "drmtest.h"
> +#include "igt_debugfs.h"
> +#include "igt_aux.h"
> +#include "intel_chipset.h"
> +#include "intel_io.h"
> +
> +enum operation {
> +       GPU_RESET = 0x01,
> +       SUSPEND_RESUME = 0x02,
> +};
> +
> +struct intel_wa {
> +       uint32_t addr;
> +       uint32_t value;
> +       uint32_t mask;
> +};
> +
> +int drm_fd;
> +uint32_t devid;
> +static drm_intel_bufmgr *bufmgr;
> +struct intel_batchbuffer *batch;
> +int num_wa;
> +struct intel_wa *workarounds;
> +
> +
> +static void test_hang_gpu(void)
> +{
> +       int retry_count = 30;
> +       enum stop_ring_flags flags;
> +       struct drm_i915_gem_execbuffer2 execbuf;
> +       struct drm_i915_gem_exec_object2 gem_exec;
> +       uint32_t b[2] = {MI_BATCH_BUFFER_END};
> +
> +       igt_assert(retry_count);
> +       igt_set_stop_rings(STOP_RING_DEFAULTS);
> +
> +       memset(&gem_exec, 0, sizeof(gem_exec));
> +       gem_exec.handle = gem_create(drm_fd, 4096);
> +       gem_write(drm_fd, gem_exec.handle, 0, b, sizeof(b));
> +
> +       memset(&execbuf, 0, sizeof(execbuf));
> +       execbuf.buffers_ptr = (uintptr_t)&gem_exec;
> +       execbuf.buffer_count = 1;
> +       execbuf.batch_len = sizeof(b);
> +
> +       drmIoctl(drm_fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf);
> +
> +       while(retry_count--) {
> +               flags = igt_get_stop_rings();
> +               if (flags == 0)
> +                       break;
> +               printf("gpu hang not yet cleared, retries left %d\n", retry_count);
> +               sleep(1);
> +       }
> +
> +       flags = igt_get_stop_rings();
> +       if (flags)
> +               igt_set_stop_rings(STOP_RING_NONE);
> +}
> +
> +static void test_suspend_resume(void)
> +{
> +       printf("Suspending the device ...\n");
> +       igt_system_suspend_autoresume();
> +}
> +
> +static void capture_wa_state(const char *wa_reg_file, char *buf, int size)
> +{
> +       int fd;
> +       int len = 0;
> +       char data[512];
> +
> +       fd = igt_debugfs_open(wa_reg_file, O_RDONLY);
> +       igt_assert(fd > 0);
> +       len = read(fd, data, size);
> +       data[len - 1] = '\0';
> +       close(fd);
> +
> +}
> +
> +static void get_current_wa_data(struct intel_wa **curr, int num)
> +{
> +       int i;
> +       struct intel_wa *ptr = NULL;
> +
> +       ptr = *curr;
> +
> +       intel_register_access_init(intel_get_pci_device(), 0);
> +
> +       for (i = 0; i < num; ++i) {
> +               ptr[i].addr = workarounds[i].addr;
> +               ptr[i].value = intel_register_read(workarounds[i].addr);
> +               ptr[i].mask = workarounds[i].mask;
> +       }
> +
> +       intel_register_access_fini();
> +}
> +
> +static void check_workarounds(enum operation op, int num)
> +{
> +       int i;
> +       int fail_count = 0;
> +       int status = 0;
> +       struct intel_wa *current_wa = NULL;
> +
> +       switch (op) {
> +       case GPU_RESET:
> +               test_hang_gpu();
> +               break;
> +
> +       case SUSPEND_RESUME:
> +               test_suspend_resume();
> +               break;
> +
> +       default:
> +               fail_count = 1;
> +               goto out;
> +       }
> +
> +       current_wa = malloc(num * sizeof(*current_wa));
> +       igt_assert(current_wa);
> +       get_current_wa_data(&current_wa, num);
> +
> +       printf("Address\tbefore\t\tafter\t\tw/a mask\tresult\n");
> +       for (i = 0; i < num; ++i) {
> +               status = (current_wa[i].value & current_wa[i].mask) !=
> +                       (workarounds[i].value & workarounds[i].mask);
> +               if (status)
> +                       ++fail_count;
> +
> +               printf("0x%X\t0x%08X\t0x%08X\t0x%08X\t%s\n",
> +                      current_wa[i].addr, workarounds[i].value,
> +                      current_wa[i].value, current_wa[i].mask,
> +                      status ? "fail" : "success");
> +       }
> +
> +out:
> +       free(current_wa);
> +       igt_assert(fail_count == 0);
> +}
> +
> +int main(int argc, char **argv)
> +{
> +       igt_subtest_init(argc, argv);
> +
> +       igt_fixture {
> +               int i;
> +               int ret;
> +               FILE *file;
> +               int card_index;
> +               const char *dri_path = "/sys/kernel/debug/dri";
> +               char *filename = NULL;
> +               char *line = NULL;
> +               size_t line_size;
> +
> +               drm_fd = drm_open_any();
> +
> +               bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
> +               devid = intel_get_drm_devid(drm_fd);
> +               batch = intel_batchbuffer_alloc(bufmgr, devid);
> +
> +               card_index = drm_get_card();
> +               igt_assert(card_index != -1);
> +
> +               ret = asprintf(&filename, "%s/%d/intel_wa_registers",
> +                              dri_path, card_index);
> +               igt_assert(ret > 0);
> +
> +               file = fopen(filename, "r");
> +               igt_assert(file > 0);
> +
> +               ret = getline(&line, &line_size, file);
> +               igt_assert(ret > 0);
> +               sscanf(line, "Workarounds applied: %d", &num_wa);
> +               igt_assert(num_wa > 0);
> +
> +               workarounds = malloc(num_wa * sizeof(*workarounds));
> +
> +               i = 0;
> +               while(getline(&line, &line_size, file) > 0) {
> +                       sscanf(line, "0x%X: 0x%08X, mask: 0x%08X",
> +                              &workarounds[i].addr, &workarounds[i].value,
> +                              &workarounds[i].mask);
> +                       ++i;
> +               }
> +
> +               free(line);
> +               fclose(file);
> +       }
> +
> +       igt_subtest("check-workaround-data-after-reset") {
> +               if (IS_BROADWELL(devid))
> +                       check_workarounds(GPU_RESET, num_wa);
> +               else
> +                       igt_skip_on("No Workaround table available!!\n");
> +       }
> +
> +       igt_subtest("check-workaround-data-after-suspend-resume") {
> +               if (IS_BROADWELL(devid))
> +                       check_workarounds(SUSPEND_RESUME, num_wa);
> +               else
> +                       igt_skip_on("No Workaround table available!!\n");
> +       }
> +
> +       free(workarounds);
> +
> +       close(drm_fd);
> +       igt_exit();
> +}
> --
> 2.0.4
>
>
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>



-- 
Paulo Zanoni
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