Verifies that the kernel programs slices correctly based by reading
the value of PWR_CLK_STATE register.
v2: Add subslice tests (Lionel)
Use MI_SET_PREDICATE for further verification when available (Lionel)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
tests/Makefile.sources | 1 +
tests/ctx_rpcs.c | 453 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/meson.build | 1 +
3 files changed, 455 insertions(+)
create mode 100644 tests/ctx_rpcs.c
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 0adc28a0..18d18f08 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -26,6 +26,7 @@ TESTS_progs = \
core_getversion \
core_prop_blob \
core_setmaster_vs_auth \
+ ctx_rpcs \
debugfs_test \
drm_import_export \
drm_mm \
diff --git a/tests/ctx_rpcs.c b/tests/ctx_rpcs.c
new file mode 100644
index 00000000..a127084e
--- /dev/null
+++ b/tests/ctx_rpcs.c
@@ -0,0 +1,453 @@
+/*
+ * 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.
+ *
+ * Authors:
+ * Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
+ *
+ */
+
+#define _GNU_SOURCE
+#include "igt.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/wait.h>
+
+#include "intel_bufmgr.h"
+
+#define MI_STORE_REGISTER_MEM (0x24 << 23)
+
+#define MI_SET_PREDICATE (0x1 << 23)
+#define MI_SET_PREDICATE_NOOP_NEVER (0)
+#define MI_SET_PREDICATE_1_SLICES (5)
+#define MI_SET_PREDICATE_2_SLICES (6)
+#define MI_SET_PREDICATE_3_SLICES (7)
+
+#define GEN8_R_PWR_CLK_STATE 0x20C8
+#define GEN8_RPCS_ENABLE (1 << 31)
+#define GEN8_RPCS_S_CNT_ENABLE (1 << 18)
+#define GEN8_RPCS_S_CNT_SHIFT 15
+#define GEN8_RPCS_S_CNT_MASK (0x7 << GEN8_RPCS_S_CNT_SHIFT)
+#define GEN8_RPCS_SS_CNT_ENABLE (1 << 11)
+#define GEN8_RPCS_SS_CNT_SHIFT 8
+#define GEN8_RPCS_SS_CNT_MASK (0x7 << GEN8_RPCS_SS_CNT_SHIFT)
+#define GEN8_RPCS_EU_MAX_SHIFT 4
+#define GEN8_RPCS_EU_MAX_MASK (0xf << GEN8_RPCS_EU_MAX_SHIFT)
+#define GEN8_RPCS_EU_MIN_SHIFT 0
+#define GEN8_RPCS_EU_MIN_MASK (0xf << GEN8_RPCS_EU_MIN_SHIFT)
+
+#ifndef I915_PARAM_SLICE_MASK
+#define I915_PARAM_SLICE_MASK (46)
+#define I915_PARAM_SUBSLICE_MASK (47)
+#endif /* I915_PARAM_SLICE_MASK */
+
+#ifndef I915_CONTEXT_PARAM_SSEU
+#define I915_CONTEXT_PARAM_SSEU 0x6
+
+struct drm_i915_gem_context_param_sseu {
+ /*
+ * Engine to be configured or queried. Same value you would use with
+ * drm_i915_gem_execbuffer2.
+ */
+ __u64 flags;
+
+ union {
+ struct {
+ __u8 slice_mask;
+ __u8 subslice_mask;
+ __u8 min_eu_per_subslice;
+ __u8 max_eu_per_subslice;
+ } packed;
+ __u64 value;
+ };
+};
+#endif /* I915_CONTEXT_PARAM_SSEU */
+
+static int drm_fd;
+static int devid;
+static uint64_t device_slice_mask = 0;
+static uint64_t device_subslice_mask = 0;
+static uint32_t device_slice_count = 0;
+static uint32_t device_subslice_count = 0;
+
+static uint64_t mask_minus(uint64_t mask)
+{
+ int i;
+
+ for (i = 0; i < (sizeof(mask) * 8 - 1); i++) {
+ if ((1UL << i) & mask) {
+ return mask & ~(1UL << i);
+ }
+ }
+
+ igt_assert(!"reached");
+ return 0;
+}
+
+static uint32_t
+read_rpcs_reg(drm_intel_bufmgr *bufmgr,
+ drm_intel_context *context,
+ uint64_t engine,
+ uint32_t expected_slices)
+{
+ struct intel_batchbuffer *batch;
+ drm_intel_bo *bo;
+ uint32_t rpcs;
+ int ret;
+
+ batch = intel_batchbuffer_alloc(bufmgr, devid);
+ igt_assert(batch);
+
+ intel_batchbuffer_set_context(batch, context);
+
+ bo = drm_intel_bo_alloc(bufmgr, "target bo", 4096, 4096);
+ igt_assert(bo);
+
+ /* Clear destination buffer. */
+ ret = drm_intel_bo_map(bo, false /* write enable */);
+ igt_assert_eq(ret, 0);
+ memset(bo->virtual, 0, bo->size);
+ drm_intel_bo_unmap(bo);
+
+ /*
+ * Prior to Gen10 we can use the predicate to further verify
+ * that the hardware has been programmed correctly.
+ */
+ if (expected_slices != 0 && intel_gen(devid) < 10) {
+ BEGIN_BATCH(5, 1);
+ OUT_BATCH(MI_SET_PREDICATE | (1 - 1) |
+ (MI_SET_PREDICATE_1_SLICES + expected_slices - 1));
+ } else {
+ BEGIN_BATCH(3, 1);
+ }
+
+ OUT_BATCH(MI_STORE_REGISTER_MEM | (4 - 2));
+ OUT_BATCH(GEN8_R_PWR_CLK_STATE);
+ OUT_RELOC(bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION, 0);
+
+ if (expected_slices != 0 && intel_gen(devid) < 10)
+ OUT_BATCH(MI_SET_PREDICATE | (1 - 1) | MI_SET_PREDICATE_NOOP_NEVER);
+
+ ADVANCE_BATCH();
+
+ intel_batchbuffer_flush_on_ring(batch, engine);
+
+ drm_intel_bo_wait_rendering(bo);
+
+ ret = drm_intel_bo_map(bo, false /* write enable */);
+ igt_assert_eq(ret, 0);
+
+ rpcs = *((uint32_t *) bo->virtual);
+
+ drm_intel_bo_unmap(bo);
+ drm_intel_bo_unreference(bo);
+
+ intel_batchbuffer_free(batch);
+
+ return rpcs;
+}
+
+
+static uint32_t
+read_slice_count(drm_intel_bufmgr *bufmgr,
+ drm_intel_context *context,
+ uint32_t expected_slice_count)
+{
+ return (read_rpcs_reg(bufmgr, context, I915_EXEC_RENDER,
+ expected_slice_count) & GEN8_RPCS_S_CNT_MASK)
+ >> GEN8_RPCS_S_CNT_SHIFT;
+}
+
+static uint32_t
+read_subslice_count(drm_intel_bufmgr *bufmgr,
+ drm_intel_context *context)
+{
+ return (read_rpcs_reg(bufmgr, context, I915_EXEC_RENDER, 0) & GEN8_RPCS_SS_CNT_MASK)
+ >> GEN8_RPCS_SS_CNT_SHIFT;
+}
+
+static void
+context_get_sseu_masks(drm_intel_context *context, uint64_t engine,
+ uint32_t *slice_mask, uint32_t *subslice_mask)
+{
+ struct drm_i915_gem_context_param arg;
+ struct drm_i915_gem_context_param_sseu sseu;
+ uint32_t context_id;
+ int ret;
+
+ memset(&sseu, 0, sizeof(sseu));
+ sseu.flags = engine;
+
+ ret = drm_intel_gem_context_get_id(context, &context_id);
+ igt_assert_eq(ret, 0);
+
+ memset(&arg, 0, sizeof(arg));
+ arg.ctx_id = context_id;
+ arg.param = I915_CONTEXT_PARAM_SSEU;
+ arg.value = (uintptr_t) &sseu;
+
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM, &arg);
+
+ if (slice_mask)
+ *slice_mask = sseu.packed.slice_mask;
+ if (subslice_mask)
+ *subslice_mask = sseu.packed.subslice_mask;
+}
+
+static void
+context_set_slice_mask(drm_intel_context *context, uint64_t engine,
+ uint32_t slice_mask)
+{
+ struct drm_i915_gem_context_param arg;
+ struct drm_i915_gem_context_param_sseu sseu;
+ uint32_t context_id;
+ int ret;
+
+ memset(&sseu, 0, sizeof(sseu));
+ sseu.flags = engine;
+
+ ret = drm_intel_gem_context_get_id(context, &context_id);
+ igt_assert_eq(ret, 0);
+
+ memset(&arg, 0, sizeof(arg));
+ arg.ctx_id = context_id;
+ arg.param = I915_CONTEXT_PARAM_SSEU;
+ arg.value = (uintptr_t) &sseu;
+
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM, &arg);
+
+ sseu.packed.slice_mask = slice_mask;
+
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GEM_CONTEXT_SETPARAM, &arg);
+}
+
+static void
+context_set_subslice_mask(drm_intel_context *context, uint64_t engine,
+ uint32_t subslice_mask)
+{
+ struct drm_i915_gem_context_param arg;
+ struct drm_i915_gem_context_param_sseu sseu;
+ uint32_t context_id;
+ int ret;
+
+ memset(&sseu, 0, sizeof(sseu));
+ sseu.flags = engine;
+
+ ret = drm_intel_gem_context_get_id(context, &context_id);
+ igt_assert_eq(ret, 0);
+
+ memset(&arg, 0, sizeof(arg));
+ arg.ctx_id = context_id;
+ arg.param = I915_CONTEXT_PARAM_SSEU;
+ arg.value = (uintptr_t) &sseu;
+
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM, &arg);
+
+ sseu.packed.subslice_mask = subslice_mask;
+
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GEM_CONTEXT_SETPARAM, &arg);
+}
+
+static void rpcs_slice_program_gt(uint64_t engine)
+{
+ drm_intel_bufmgr *bufmgr;
+ drm_intel_context *context1, *context2;
+ uint32_t slice_mask;
+
+ bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
+ igt_assert(bufmgr);
+
+ context1 = drm_intel_gem_context_create(bufmgr);
+ igt_assert(context1);
+
+ context2 = drm_intel_gem_context_create(bufmgr);
+ igt_assert(context2);
+
+ context_set_slice_mask(context1, engine, mask_minus(device_slice_mask));
+ context_set_slice_mask(context2, engine, device_slice_mask);
+
+ context_get_sseu_masks(context1, engine, &slice_mask, NULL);
+ igt_assert_eq(mask_minus(device_slice_mask), slice_mask);
+ context_get_sseu_masks(context2, engine, &slice_mask, NULL);
+ igt_assert_eq(device_slice_mask, slice_mask);
+
+ /*
+ * Test false positives with predicates (only available on
+ * before Gen10).
+ */
+ if (intel_gen(devid) < 10) {
+ igt_assert_eq(0, read_slice_count(bufmgr, context1, device_slice_count));
+ }
+
+ igt_assert_eq(device_slice_count - 1,
+ read_slice_count(bufmgr, context1, device_slice_count - 1));
+ igt_assert_eq(device_slice_count,
+ read_slice_count(bufmgr, context2, device_slice_count));
+
+ context_set_slice_mask(context1, engine, device_slice_mask);
+ context_set_slice_mask(context2, engine, mask_minus(device_slice_mask));
+
+ context_get_sseu_masks(context1, engine, &slice_mask, NULL);
+ igt_assert_eq(device_slice_mask, slice_mask);
+ context_get_sseu_masks(context2, engine, &slice_mask, NULL);
+ igt_assert_eq(mask_minus(device_slice_mask), slice_mask);
+
+ igt_assert_eq(device_slice_count,
+ read_slice_count(bufmgr, context1, device_slice_count));
+ igt_assert_eq(device_slice_count - 1,
+ read_slice_count(bufmgr, context2, device_slice_count - 1));
+
+ if (device_slice_count >= 3) {
+ context_set_slice_mask(context1, engine, device_slice_mask);
+ context_set_slice_mask(context2, engine, mask_minus(mask_minus(device_slice_mask)));
+
+ context_get_sseu_masks(context1, engine, &slice_mask, NULL);
+ igt_assert_eq(device_slice_mask, slice_mask);
+ context_get_sseu_masks(context2, engine, &slice_mask, NULL);
+ igt_assert_eq(mask_minus(mask_minus(device_slice_mask)), slice_mask);
+
+ igt_assert_eq(device_slice_count,
+ read_slice_count(bufmgr, context1, device_slice_count));
+ igt_assert_eq(device_slice_count - 2,
+ read_slice_count(bufmgr, context2, device_slice_count - 2));
+ }
+
+ drm_intel_gem_context_destroy(context1);
+ drm_intel_gem_context_destroy(context2);
+
+ drm_intel_bufmgr_destroy(bufmgr);
+}
+
+static void rpcs_subslice_program_gt(uint64_t engine)
+{
+ drm_intel_bufmgr *bufmgr;
+ drm_intel_context *context1, *context2;
+ uint32_t subslice_mask;
+
+ bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
+ igt_assert(bufmgr);
+
+ context1 = drm_intel_gem_context_create(bufmgr);
+ igt_assert(context1);
+
+ context2 = drm_intel_gem_context_create(bufmgr);
+ igt_assert(context2);
+
+ context_set_subslice_mask(context1, engine, mask_minus(device_subslice_mask));
+ context_set_subslice_mask(context2, engine, device_subslice_mask);
+
+ context_get_sseu_masks(context1, engine, NULL, &subslice_mask);
+ igt_assert_eq(mask_minus(device_subslice_mask), subslice_mask);
+ context_get_sseu_masks(context2, engine, NULL, &subslice_mask);
+ igt_assert_eq(device_subslice_mask, subslice_mask);
+
+ igt_assert_eq(device_subslice_count - 1, read_subslice_count(bufmgr, context1));
+ igt_assert_eq(device_subslice_count, read_subslice_count(bufmgr, context2));
+
+ context_set_subslice_mask(context1, engine, device_subslice_mask);
+ context_set_subslice_mask(context2, engine, mask_minus(device_subslice_mask));
+
+ context_get_sseu_masks(context1, engine, NULL, &subslice_mask);
+ igt_assert_eq(device_subslice_mask, subslice_mask);
+ context_get_sseu_masks(context2, engine, NULL, &subslice_mask);
+ igt_assert_eq(mask_minus(device_subslice_mask), subslice_mask);
+
+ igt_assert_eq(device_subslice_count, read_subslice_count(bufmgr, context1));
+ igt_assert_eq(device_subslice_count - 1, read_subslice_count(bufmgr, context2));
+
+ if (device_subslice_count >= 3) {
+ context_set_subslice_mask(context1, engine, device_subslice_mask);
+ context_set_subslice_mask(context2, engine,
+ mask_minus(mask_minus(device_subslice_mask)));
+
+ context_get_sseu_masks(context1, engine, &subslice_mask, NULL);
+ igt_assert_eq(device_subslice_mask, subslice_mask);
+ context_get_sseu_masks(context2, engine, &subslice_mask, NULL);
+ igt_assert_eq(mask_minus(mask_minus(device_subslice_mask)), subslice_mask);
+
+ igt_assert_eq(device_subslice_count, read_subslice_count(bufmgr, context2));
+ igt_assert_eq(device_subslice_count - 2, read_subslice_count(bufmgr, context1));
+ }
+
+ drm_intel_gem_context_destroy(context1);
+ drm_intel_gem_context_destroy(context2);
+
+ drm_intel_bufmgr_destroy(bufmgr);
+}
+
+igt_main
+{
+ uint64_t engines[] = {
+ I915_EXEC_RENDER,
+ I915_EXEC_BSD,
+ I915_EXEC_VEBOX,
+ };
+ int i;
+ drm_i915_getparam_t gp;
+
+ igt_fixture {
+ /* Use drm_open_driver to verify device existence */
+ drm_fd = drm_open_driver(DRIVER_INTEL);
+ igt_require_gem(drm_fd);
+
+ devid = intel_get_drm_devid(drm_fd);
+
+ /* We can only program slice count from Gen8. */
+ igt_skip_on(intel_gen(devid) < 8);
+ }
+
+ gp.param = I915_PARAM_SLICE_MASK;
+ gp.value = (int *) &device_slice_mask;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+ device_slice_count = __builtin_popcount(device_slice_mask);
+
+ gp.param = I915_PARAM_SUBSLICE_MASK;
+ gp.value = (int *) &device_subslice_mask;
+ do_ioctl(drm_fd, DRM_IOCTL_I915_GETPARAM, &gp);
+ device_subslice_count = __builtin_popcount(device_subslice_mask);
+
+ igt_subtest("rpcs-slice-program-rcs") {
+ igt_require(device_slice_count >= 2);
+
+ for (i = 0; i < ARRAY_SIZE(engines); i++)
+ rpcs_slice_program_gt(engines[i]);
+ }
+
+ igt_subtest("rpcs-subslice-program-rcs") {
+ igt_require(device_subslice_count >= 2);
+ /* Only available on some Atom platforms and Gen10+. */
+ igt_require(IS_BROXTON(devid) || IS_GEMINILAKE(devid) ||
+ intel_gen(devid) >= 10);
+
+ for (i = 0; i < ARRAY_SIZE(engines); i++)
+ rpcs_subslice_program_gt(engines[i]);
+ }
+
+ igt_fixture {
+ close(drm_fd);
+ }
+}
diff --git a/tests/meson.build b/tests/meson.build
index 1c619179..18e656a0 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -6,6 +6,7 @@ test_progs = [
'core_getversion',
'core_prop_blob',
'core_setmaster_vs_auth',
+ 'ctx_rpcs',
'debugfs_test',
'drm_import_export',
'drm_mm',
--
2.14.1
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