[Intel-gfx] [PATCH v6 i-g-t] igt/perf: add tests to verify create/destroy userspace configs
Matthew Auld
matthew.william.auld at gmail.com
Thu Aug 3 14:21:58 UTC 2017
On 28 July 2017 at 18:12, Lionel Landwerlin
<lionel.g.landwerlin at intel.com> wrote:
> v2: Add tests regarding removing configs (Matthew)
> Add tests regarding adding/removing configs without permissions
> (Matthew)
>
> v3: Add some flex registers (Matthew)
>
> v4: memset oa_config to 0 (Lionel)
> Change error code for removing unexisting config EINVAL->ENOENT (Lionel)
>
> v5: Update i915 uapi (Chris)
> Use wrappers to make assertions more readable (Chris)
>
> v6: Add whitelisting test (Lionel)
>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
> tests/perf.c | 336 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 336 insertions(+)
>
> diff --git a/tests/perf.c b/tests/perf.c
> index 1c5cf351..0fa7ba78 100644
> --- a/tests/perf.c
> +++ b/tests/perf.c
> @@ -146,6 +146,32 @@ enum drm_i915_perf_record_type {
> };
> #endif /* !DRM_I915_PERF_OPEN */
>
> +#ifndef DRM_IOCTL_I915_PERF_ADD_CONFIG
> +
> +#define DRM_I915_PERF_ADD_CONFIG 0x37
> +#define DRM_I915_PERF_REMOVE_CONFIG 0x38
> +
> +#define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config)
> +#define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_REMOVE_CONFIG, __u64)
> +
> +/**
> + * Structure to upload perf dynamic configuration into the kernel.
> + */
> +struct drm_i915_perf_oa_config {
> + /** String formatted like "%08x-%04x-%04x-%04x-%012x" */
> + char uuid[36];
> +
> + __u32 n_mux_regs;
> + __u32 n_boolean_regs;
> + __u32 n_flex_regs;
> +
> + __u64 mux_regs_ptr;
> + __u64 boolean_regs_ptr;
> + __u64 flex_regs_ptr;
> +};
> +
> +#endif /* !DRM_IOCTL_I915_PERF_ADD_CONFIG */
> +
> struct accumulator {
> #define MAX_RAW_OA_COUNTERS 62
> enum drm_i915_oa_format format;
> @@ -4001,6 +4027,304 @@ test_rc6_disable(void)
> igt_assert_neq(n_events_end - n_events_start, 0);
> }
>
> +static int __i915_perf_add_config(int fd, struct drm_i915_perf_oa_config *config)
> +{
> + int ret = igt_ioctl(fd, DRM_IOCTL_I915_PERF_ADD_CONFIG, config);
> + if (ret < 0)
> + ret = -errno;
> + return ret;
> +}
> +
> +static int i915_perf_add_config(int fd, struct drm_i915_perf_oa_config *config)
> +{
> + int config_id = __i915_perf_add_config(fd, config);
> +
> + igt_debug("config_id=%i\n", config_id);
> + igt_assert(config_id > 0);
> +
> + return config_id;
> +}
> +
> +static void
> +test_invalid_create_userspace_config(void)
> +{
> + struct drm_i915_perf_oa_config config;
> + const char *uuid = "01234567-0123-0123-0123-0123456789ab";
> + const char *invalid_uuid = "blablabla-wrong";
> + uint32_t mux_regs[] = { 0x9888 /* NOA_WRITE */, 0x0 };
> + uint32_t invalid_mux_regs[] = { 0x12345678 /* invalid register */, 0x0 };
> +
> + memset(&config, 0, sizeof(config));
> +
> + /* invalid uuid */
> + strncpy(config.uuid, invalid_uuid, sizeof(config.uuid));
> + config.n_mux_regs = 1;
> + config.mux_regs_ptr = to_user_pointer(mux_regs);
> + config.n_boolean_regs = 0;
> + config.n_flex_regs = 0;
> +
> + igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL);
> +
> + /* invalid mux_regs */
> + strncpy(config.uuid, uuid, sizeof(config.uuid));
> + config.n_mux_regs = 1;
> + config.mux_regs_ptr = to_user_pointer(invalid_mux_regs);
> + config.n_boolean_regs = 0;
> + config.n_flex_regs = 0;
> +
> + igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL);
> +
> + /* empty config */
> + strncpy(config.uuid, uuid, sizeof(config.uuid));
> + config.n_mux_regs = 0;
> + config.mux_regs_ptr = to_user_pointer(mux_regs);
> + config.n_boolean_regs = 0;
> + config.n_flex_regs = 0;
> +
> + igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL);
> +
> + /* empty config with null pointers */
> + strncpy(config.uuid, uuid, sizeof(config.uuid));
> + config.n_mux_regs = 1;
> + config.mux_regs_ptr = to_user_pointer(NULL);
> + config.n_boolean_regs = 2;
> + config.boolean_regs_ptr = to_user_pointer(NULL);
> + config.n_flex_regs = 3;
> + config.flex_regs_ptr = to_user_pointer(NULL);
> +
> + igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EINVAL);
> +}
> +
> +static void
> +test_invalid_remove_userspace_config(void)
> +{
> + struct drm_i915_perf_oa_config config;
> + const char *uuid = "01234567-0123-0123-0123-0123456789ab";
> + uint32_t mux_regs[] = { 0x9888 /* NOA_WRITE */, 0x0 };
> + uint64_t config_id, wrong_config_id = 999999999;
> + char path[512];
> +
> + snprintf(path, sizeof(path), "/sys/class/drm/card%d/metrics/%s/id", card, uuid);
> +
> + /* Destroy previous configuration if present */
> + if (try_read_u64_file(path, &config_id))
> + igt_assert(igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id) == 0);
Do we not want an i915_perf_remove_config wrapper, like we have for ADD_CONFIG?
> +
> + memset(&config, 0, sizeof(config));
> +
> + memcpy(config.uuid, uuid, sizeof(config.uuid));
> +
> + config.n_mux_regs = 1;
> + config.mux_regs_ptr = to_user_pointer(mux_regs);
> + config.n_boolean_regs = 0;
> + config.n_flex_regs = 0;
> +
> + config_id = i915_perf_add_config(drm_fd, &config);
> +
> + /* Removing configs without permissions should fail. */
> + igt_fork(child, 1) {
> + igt_drop_root();
> +
> + do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id, EACCES);
> + }
> + igt_waitchildren();
> +
> + /* Removing invalid config ID should fail. */
> + do_ioctl_err(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &wrong_config_id, ENOENT);
> +
> + igt_assert(igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id) == 0);
> +}
> +
> +static void
> +test_create_destroy_userspace_config(void)
> +{
> + struct drm_i915_perf_oa_config config;
> + const char *uuid = "01234567-0123-0123-0123-0123456789ab";
> + uint32_t mux_regs[] = { 0x9888 /* NOA_WRITE */, 0x0 };
> + uint32_t flex_regs[100];
> + int i;
> + uint64_t config_id;
> + uint64_t properties[] = {
> + DRM_I915_PERF_PROP_OA_METRICS_SET, 0, /* Filled later */
> +
> + /* OA unit configuration */
> + DRM_I915_PERF_PROP_SAMPLE_OA, true,
> + DRM_I915_PERF_PROP_OA_FORMAT, test_oa_format,
> + DRM_I915_PERF_PROP_OA_EXPONENT, oa_exp_1_millisec,
> + DRM_I915_PERF_PROP_OA_METRICS_SET
> + };
> + struct drm_i915_perf_open_param param = {
> + .flags = I915_PERF_FLAG_FD_CLOEXEC |
> + I915_PERF_FLAG_FD_NONBLOCK |
> + I915_PERF_FLAG_DISABLED,
> + .num_properties = ARRAY_SIZE(properties) / 2,
> + .properties_ptr = to_user_pointer(properties),
> + };
> + char path[512];
> +
> + snprintf(path, sizeof(path), "/sys/class/drm/card%d/metrics/%s/id", card, uuid);
> +
> + /* Destroy previous configuration if present */
> + if (try_read_u64_file(path, &config_id))
> + igt_assert(igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id) == 0);
> +
> + memset(&config, 0, sizeof(config));
> + strncpy(config.uuid, uuid, sizeof(config.uuid));
> +
> + config.n_mux_regs = 1;
> + config.mux_regs_ptr = to_user_pointer(mux_regs);
> + for (i = 0; i < ARRAY_SIZE(flex_regs) / 2; i++) {
> + flex_regs[i * 2] = 0xe458; /* EU_PERF_CNTL0 */
> + flex_regs[i * 2 + 1] = 0x0;
> + }
> + config.flex_regs_ptr = to_user_pointer(flex_regs);
> + config.n_flex_regs = ARRAY_SIZE(flex_regs) / 2;
> + config.n_boolean_regs = 0;
> +
> + /* Creating configs without permissions shouldn't work. */
> + igt_fork(child, 1) {
> + igt_drop_root();
> +
> + igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EACCES);
> + }
> + igt_waitchildren();
> +
> + /* Create a new config */
> + config_id = i915_perf_add_config(drm_fd, &config);
> +
> + /* Verify that adding the another config with the same uuid fails. */
> + igt_assert_eq(__i915_perf_add_config(drm_fd, &config), -EADDRINUSE);
> +
> + /* Try to use the new config */
> + properties[1] = config_id;
> + stream_fd = __perf_open(drm_fd, ¶m);
> +
> + /* Verify that destroying the config doesn't yield any error. */
> + igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id);
> +
> + /* Read the config to verify shouldn't raise any issue. */
Read the config? Add back the config while in use?
> + config_id = i915_perf_add_config(drm_fd, &config);
Check the return value for potential error?
> +
> + __perf_close(stream_fd);
> +
> + igt_assert(igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id) == 0);
> +}
> +
> +/* Registers required by userspace. This list should be maintained by
> + * the OA configs developers and agreed upon with kernel developers as
> + * some of the registers are .
Oh the suspense! As some of the registers are ___ ?
Otherwise feel free to add:
Reviewed-by: Matthew Auld <matthew.auld at intel.com>
> + */
> +static void
> +test_whitelisted_registers_userspace_config(void)
> +{
> + struct drm_i915_perf_oa_config config;
> + const char *uuid = "01234567-0123-0123-0123-0123456789ab";
> + uint32_t mux_regs[200];
> + uint32_t b_counters_regs[200];
> + uint32_t flex_regs[200];
> + uint32_t i;
> + uint64_t config_id;
> + char path[512];
> + int ret;
> + const uint32_t flex[] = {
> + 0xe458,
> + 0xe558,
> + 0xe658,
> + 0xe758,
> + 0xe45c,
> + 0xe55c,
> + 0xe65c
> + };
> +
> + snprintf(path, sizeof(path), "/sys/class/drm/card%d/metrics/%s/id", card, uuid);
> +
> + if (try_read_u64_file(path, &config_id))
> + igt_assert(igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id) == 0);
> +
> + memset(&config, 0, sizeof(config));
> + memcpy(config.uuid, uuid, sizeof(config.uuid));
> +
> + /* OASTARTTRIG[1-8] */
> + for (i = 0x2710; i <= 0x272c; i += 4) {
> + b_counters_regs[config.n_boolean_regs * 2] = i;
> + b_counters_regs[config.n_boolean_regs * 2 + 1] = 0;
> + config.n_boolean_regs++;
> + }
> + /* OAREPORTTRIG[1-8] */
> + for (i = 0x2740; i <= 0x275c; i += 4) {
> + b_counters_regs[config.n_boolean_regs * 2] = i;
> + b_counters_regs[config.n_boolean_regs * 2 + 1] = 0;
> + config.n_boolean_regs++;
> + }
> + config.boolean_regs_ptr = (uintptr_t) b_counters_regs;
> +
> + /* Flex EU registers */
> + for (i = 0; i < ARRAY_SIZE(flex); i++) {
> + flex_regs[config.n_flex_regs * 2] = flex[i];
> + flex_regs[config.n_flex_regs * 2 + 1] = 0;
> + config.n_flex_regs++;
> + }
> + config.flex_regs_ptr = (uintptr_t) flex_regs;
> +
> + /* Mux registers (too many of them, just checking bounds) */
> + i = 0;
> +
> + /* NOA_WRITE */
> + mux_regs[i++] = 0x9800;
> + mux_regs[i++] = 0;
> +
> + if (IS_HASWELL(devid)) {
> + /* Haswell specific. undocumented... */
> + mux_regs[i++] = 0x9ec0;
> + mux_regs[i++] = 0;
> +
> + mux_regs[i++] = 0x25100;
> + mux_regs[i++] = 0;
> + mux_regs[i++] = 0x2ff90;
> + mux_regs[i++] = 0;
> + }
> +
> + if (intel_gen(devid) >= 8) {
> + /* NOA_CONFIG */
> + mux_regs[i++] = 0xD04;
> + mux_regs[i++] = 0;
> + mux_regs[i++] = 0xD2C;
> + mux_regs[i++] = 0;
> + /* WAIT_FOR_RC6_EXIT */
> + mux_regs[i++] = 0x20CC;
> + mux_regs[i++] = 0;
> + }
> +
> + /* HALF_SLICE_CHICKEN2 (shared with kernel workaround) */
> + mux_regs[i++] = 0xE180;
> + mux_regs[i++] = 0;
> +
> + if (IS_CHERRYVIEW(devid)) {
> + /* Cherryview specific. undocumented... */
> + mux_regs[i++] = 0x182300;
> + mux_regs[i++] = 0;
> + mux_regs[i++] = 0x1823A4;
> + mux_regs[i++] = 0;
> + }
> +
> + /* PERFCNT[12] */
> + mux_regs[i++] = 0x91B8;
> + mux_regs[i++] = 0;
> + /* PERFMATRIX */
> + mux_regs[i++] = 0x91C8;
> + mux_regs[i++] = 0;
> +
> + config.mux_regs_ptr = (uintptr_t) mux_regs;
> + config.n_mux_regs = i / 2;
> +
> + /* Create a new config */
> + ret = igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_ADD_CONFIG, &config);
> + igt_assert(ret > 0); /* Config 0 should be used by the kernel */
> + config_id = ret;
> +
> + igt_assert(igt_ioctl(drm_fd, DRM_IOCTL_I915_PERF_REMOVE_CONFIG, &config_id) == 0);
> +}
> +
> static unsigned
> read_i915_module_ref(void)
> {
> @@ -4223,6 +4547,18 @@ igt_main
> igt_subtest("rc6-disable")
> test_rc6_disable();
>
> + igt_subtest("invalid-create-userspace-config")
> + test_invalid_create_userspace_config();
> +
> + igt_subtest("invalid-remove-userspace-config")
> + test_invalid_remove_userspace_config();
> +
> + igt_subtest("create-destroy-userspace-config")
> + test_create_destroy_userspace_config();
> +
> + igt_subtest("whitelisted-registers-userspace-config")
> + test_whitelisted_registers_userspace_config();
> +
> igt_fixture {
> /* leave sysctl options in their default state... */
> write_u64_file("/proc/sys/dev/i915/oa_max_sample_rate", 100000);
> --
> 2.13.3
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