We can verify that topology is consistent with previous getparam like
EU_TOTAL/SLICE_MASK/SUBSLICE_MASK.
We also verify that CS timestamp frequency is always filled.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
tests/Makefile.sources | 1 +
tests/intel_device_info.c | 324 ++++++++++++++++++++++++++++++++++++++++++++++
tests/meson.build | 1 +
3 files changed, 326 insertions(+)
create mode 100644 tests/intel_device_info.c
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 2313c12b..c7538cb6 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -168,6 +168,7 @@ TESTS_progs = \
gen3_render_tiledy_blits \
gen7_forcewake_mt \
gvt_basic \
+ intel_device_info \
kms_3d \
kms_addfb_basic \
kms_atomic \
diff --git a/tests/intel_device_info.c b/tests/intel_device_info.c
new file mode 100644
index 00000000..31e26cee
--- /dev/null
+++ b/tests/intel_device_info.c
@@ -0,0 +1,324 @@
+/*
+ * Copyright © 2017 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.
+ *
+ */
+
+#include "igt.h"
+#include <stdbool.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+
+#include "igt.h"
+
+IGT_TEST_DESCRIPTION("Test device information retrieving through i915_getparam.");
+
+static int drm_fd;
+static int devid;
+
+#ifndef I915_PARAM_SLICE_MASK
+#define I915_PARAM_SLICE_MASK 46
+#endif
+
+#ifndef I915_PARAM_SUBSLICE_MASK
+#define I915_PARAM_SUBSLICE_MASK 47
+#endif
+
+#ifndef I915_PARAM_CS_TIMESTAMP_FREQUENCY
+#define I915_PARAM_CS_TIMESTAMP_FREQUENCY 50
+#endif
+
+#ifndef I915_PARAM_EU_TOPOLOGY
+#define I915_PARAM_EU_TOPOLOGY 51
+/* List of active slices, subslices & execution units. Starting with CNL we
+ * can have asynmetric slices (for example 3 subslices in slice0 and 2
+ * subslices in slice1+). This means we cannot rely on PARAM_SUBSLICE_MASK
+ * anymore.
+ *
+ * When using this parameter, getparam value should point to a structure of
+ * type drm_i915_eus_enabled_t. Call this once with n_slices,
+ * n_subslices_per_slice, & n_eus_per_subslice set to 0 and the kernel will
+ * fill out only those fields. You can then allocate the
+ * drm_i915_eu_topology_t properly to have enough space to store the full
+ * topology.
+ */
+#define I915_PARAM_EU_TOPOLOGY 51
+typedef struct drm_i915_eu_topology {
+ uint32_t n_slices;
+ uint32_t n_subslices_per_slice;
+ uint32_t n_eus_per_subslice;
+
+ /* We define the following :
+ *
+ * slice_mask_size = ALIGN(n_slices, 8) / 8
+ * subslices_mask_offset = slice_mask_size
+ * sublisces_mask_stride = ALIGN(n_subslices_per_slice, 8) / 8
+ * subslices_mask_size = n_slices * sublisces_mask_stride
+ * eu_mask_offset = slice_mask_size + subslices_mask_size
+ * eu_subslice_stride = ALIGN(n_eus_per_subslice, 8) / 8
+ * eu_slice_stride = n_subslices_per_slice * eu_subslice_stride
+ * eu_mask_size = n_slices * eu_slice_stride
+ * data_size = slice_mask_size + subslices_mask_size + eu_mask_size
+ *
+ * When called with n_slices, n_subslices_per_slice &
+ * n_eus_per_subslice filled out with the kernel values, the length of
+ * data should be data_size.
+ *
+ * The kernel will write the following into data :
+ *
+ * data[0 .. slice_mask_size - 1] :
+ *
+ * Where each bit represent slices available.
+ *
+ * data[slice_mask_offset .. slice_mask_offset + subslices_mask_size - 1] :
+ *
+ * Where each bit represent the subslices available for each
+ * slice. Formula to tell if sliceX-subsliceY is enabled :
+ *
+ * ((data[slice_mask_offset + X * sublisces_mask_stride + Y / 8] >> (Y % 8)) & 1)
+ *
+ * data[eu_mask_offset .. eu_mask_offset + eu_mask_size - 1] :
+ *
+ * Where each bit reports the status of one execution unit. User
+ * should use eu_slice_stride & eu_subslice_stride to through the
+ * different subslices. Formula to tell if sliceX-subsliceY-euZ
+ * is enabled :
+ *
+ * ((data[eu_mask_offset + X * eu_slice_stride + Y * eu_subslice_stride + Z / 8] >> (Z % 8)) & 1)
+ */
+ uint8_t data[];
+} drm_i915_eu_topology_t;
+#endif /* I915_PARAM_EU_TOPOLOGY */
+
+static bool
+topology_supported(void)
+{
+ drm_i915_eu_topology_t topology;
+ drm_i915_getparam_t gp;
+
+ memset(&topology, 0, sizeof(topology));
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) &topology;
+
+ return ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp) == 0;
+}
+
+static void
+test_topology_pre_gen8(void)
+{
+ drm_i915_eu_topology_t topology;
+ drm_i915_getparam_t gp;
+
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) &topology;
+ do_ioctl_err(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp, ENODEV);
+}
+
+static void
+test_topology_invalid_params(void)
+{
+ drm_i915_eu_topology_t topology;
+ drm_i915_getparam_t gp;
+
+ memset(&topology, 0, sizeof(topology));
+
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) &topology;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+
+ topology.n_slices++;
+
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) &topology;
+ do_ioctl_err(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp, EINVAL);
+}
+
+static void
+test_topology_coherent_slice_mask(void)
+{
+ drm_i915_eu_topology_t topology;
+ drm_i915_getparam_t gp;
+ int slice_mask, subslice_mask;
+
+ gp.param = I915_PARAM_SLICE_MASK;
+ gp.value = &slice_mask;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+
+ gp.param = I915_PARAM_SUBSLICE_MASK;
+ gp.value = &subslice_mask;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+
+ memset(&topology, 0, sizeof(topology));
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) &topology;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+
+ igt_debug("slice_mask=0x%x subslice_mask=0x%x n_slices=%u n_subslices_per_slice=%u\n",
+ slice_mask, subslice_mask, topology.n_slices, topology.n_subslices_per_slice);
+
+ igt_assert(__builtin_popcount(slice_mask) <= topology.n_slices);
+ igt_assert(__builtin_popcount(subslice_mask) <= topology.n_subslices_per_slice);
+}
+
+static void
+test_topology_matches_eu_total(void)
+{
+ drm_i915_eu_topology_t *topology = calloc(1, sizeof(*topology));
+ drm_i915_getparam_t gp;
+ int i, n_eus, n_eus_topology, s;
+ int slice_mask_size, subslices_mask_offset, sublisces_mask_stride,
+ subslices_mask_size, eu_mask_offset, eu_subslice_stride,
+ eu_slice_stride, eu_mask_size, data_size;
+
+ gp.param = I915_PARAM_EU_TOTAL;
+ gp.value = &n_eus;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+ igt_debug("n_eus=%i\n", n_eus);
+
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) topology;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+ igt_debug("topology.n_slices=%i\n", topology->n_slices);
+ igt_debug("topology.n_subslices_per_slice=%i\n", topology->n_subslices_per_slice);
+ igt_debug("topology.n_eus_per_subslice=%i\n", topology->n_eus_per_subslice);
+
+ slice_mask_size = ALIGN(topology->n_slices, 8) / 8;
+ subslices_mask_offset = slice_mask_size;
+ sublisces_mask_stride = ALIGN(topology->n_subslices_per_slice, 8) / 8;
+ subslices_mask_size = topology->n_slices * sublisces_mask_stride;
+ eu_mask_offset = slice_mask_size + subslices_mask_size;
+ eu_subslice_stride = ALIGN(topology->n_eus_per_subslice, 8) / 8;
+ eu_slice_stride = topology->n_subslices_per_slice * eu_subslice_stride;
+ eu_mask_size = topology->n_slices * eu_slice_stride;
+ data_size = slice_mask_size + subslices_mask_size + eu_mask_size;
+
+ topology = realloc(topology, sizeof(*topology) + data_size);
+ memset(topology->data, 0, data_size);
+
+ gp.param = I915_PARAM_EU_TOPOLOGY;
+ gp.value = (int *) topology;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+
+ igt_debug("data:");
+ for (i = 0; i < data_size; i++)
+ igt_debug(" 0x%hhx", topology->data[i]);
+ igt_debug("\n");
+
+ n_eus_topology = 0;
+ for (i = eu_mask_offset; i < data_size; i++)
+ n_eus_topology += __builtin_popcount(topology->data[i]);
+
+ igt_debug("slice_mask:");
+ for (i = 0; i < slice_mask_size; i++)
+ igt_debug(" 0x%hhx", topology->data[i]);
+ igt_debug("\n");
+
+ for (s = 0; s < topology->n_slices; s++) {
+ int ss;
+
+ igt_debug("slice%i:\n", s);
+ igt_debug("\tsubslice_mask: 0x%hhx (%i)\n",
+ topology->data[subslices_mask_offset + s],
+ __builtin_popcount(topology->data[s]));
+
+ for (ss = 0; ss < topology->n_subslices_per_slice; ss++) {
+ int eu, n_subslice_eus = 0;
+
+ igt_debug("\tsubslice: %i\n", ss);
+
+ igt_debug("\t\teu_mask:");
+ for (eu = 0; eu < ALIGN(topology->n_eus_per_subslice, 8) / 8; eu++) {
+ uint8_t val =
+ topology->data[eu_mask_offset +
+ s * eu_slice_stride +
+ ss * eu_subslice_stride + eu];
+ igt_debug(" 0x%hhx", val);
+ n_subslice_eus += __builtin_popcount(val);
+ }
+ igt_debug(" (%i)\n", n_subslice_eus);
+ }
+ }
+
+ igt_assert(n_eus_topology == n_eus);
+}
+
+static void
+test_cs_timestamp_frequency(void)
+{
+ drm_i915_getparam_t gp;
+ int frequency, ret;
+
+ gp.param = I915_PARAM_CS_TIMESTAMP_FREQUENCY;
+ gp.value = &frequency;
+
+ /* Not supported? */
+ ret = ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+ igt_skip_on(ret != 0);
+
+ igt_debug("cs_timestamp_frequency=%i\n", frequency);
+
+ /* This should be available on all platforms. */
+ igt_assert_neq(frequency, 0);
+}
+
+igt_main
+{
+ igt_skip_on_simulation();
+ igt_fixture {
+ drm_fd = drm_open_driver_render(DRIVER_INTEL);
+ devid = intel_get_drm_devid(drm_fd);
+ }
+
+ igt_subtest("topology-pre-gen8") {
+ igt_require(intel_gen(devid) < 8);
+ test_topology_pre_gen8();
+ }
+
+ igt_subtest("topology-invalid-params") {
+ igt_require(AT_LEAST_GEN(devid, 8));
+ igt_require(topology_supported());
+ test_topology_invalid_params();
+ }
+
+ igt_subtest("topology-coherent-slice-mask") {
+ igt_require(AT_LEAST_GEN(devid, 8));
+ igt_require(topology_supported());
+ test_topology_coherent_slice_mask();
+ }
+
+ igt_subtest("topology-matches-eu-total") {
+ igt_require(AT_LEAST_GEN(devid, 8));
+ igt_require(topology_supported());
+ test_topology_matches_eu_total();
+ }
+
+ igt_subtest("cs-timestamp-frequency") {
+ test_cs_timestamp_frequency();
+ }
+
+ igt_exit();
+}
diff --git a/tests/meson.build b/tests/meson.build
index c3d5372f..54592339 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -20,6 +20,7 @@ test_progs = [
'drv_module_reload',
'drv_selftest',
'drv_suspend',
+ 'intel_device_info',
'gem_bad_reloc',
'gem_basic',
'gem_busy',
--
2.15.0.rc2
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