On Fri, Jul 29, 2016 at 10:34:35AM +0100, Peter Antoine wrote:
> This change adds a RC6 test for the MOCS. The MOCS registers are loaded
> and saved as part of the RC6 cycle but not all the registers are
> saved/restored. This tests that those registers are correctly restored.
>
> Signed-off-by: Peter Antoine <[email protected]>
> ---
> tests/gem_mocs_settings.c | 56
> +++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 56 insertions(+)
>
> diff --git a/tests/gem_mocs_settings.c b/tests/gem_mocs_settings.c
> index 4fb3a02..66d02d9 100644
> --- a/tests/gem_mocs_settings.c
> +++ b/tests/gem_mocs_settings.c
> @@ -518,6 +518,59 @@ static void run_tests(unsigned mode)
> intel_register_access_fini();
> }
>
> +static unsigned int readit(const char *path)
> +{
> + unsigned int ret = 0;
> + int scanned = 0;
> + FILE *file;
> +
> + file = fopen(path, "r");
> + igt_assert(file);
> + scanned = fscanf(file, "%u", &ret);
> + igt_assert_eq(scanned, 1);
> +
> + fclose(file);
> +
> + return ret;
> +}
> +
> +static int read_rc6_residency(void)
> +{
> + unsigned int residency;
> + const int device = drm_get_card();
> + static const char path_format[] =
> + "/sys/class/drm/card%d/power/rc6_residency_ms";
> + char path[sizeof(path_format)];
> + int ret;
> +
> + ret = snprintf(path, sizeof(path)-1, path_format, device);
> +
> + igt_assert_neq(ret, -1);
> + residency = readit(path);
This is duplicating code from igt_sysfs.c
> +
> + return residency;
> +}
> +
> +static void context_rc6_test(void)
> +{
> + int fd = drm_open_driver(DRIVER_INTEL);
> + int res_ms;
> + uint32_t ctx_id = gem_context_create(fd);
> +
> + igt_debug("RC6 Context Test\n");
> + check_control_registers(fd, I915_EXEC_RENDER, ctx_id, false);
> + check_l3cc_registers(fd, I915_EXEC_RENDER, ctx_id, false);
> +
> + res_ms = read_rc6_residency();
> + sleep(3);
Still a large and arbitrary delay.
> + igt_assert_neq(res_ms, read_rc6_residency());
Still an assert rather than skipping when the user has disabled rc6.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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