[i-g-t 16/27] tests/i915/vm_bind: Test capture of persistent mappings
Bhanuprakash Modem
bhanuprakash.modem at intel.com
Mon Jan 23 09:43:24 UTC 2023
From: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
Add i915_vm_bind_capture to validate dump capture of persistent
mappings including partial binding.
v2: Use i915_capture library routines, add vm_bind version check,
use intel allocator
v3: Use syncobj library functions
Reviewed-by: Matthew Auld <matthew.auld at intel.com>
Signed-off-by: Brian Welty <brian.welty at intel.com>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
---
tests/i915/i915_vm_bind_capture.c | 358 ++++++++++++++++++++++++++++++
tests/meson.build | 1 +
2 files changed, 359 insertions(+)
create mode 100644 tests/i915/i915_vm_bind_capture.c
diff --git a/tests/i915/i915_vm_bind_capture.c b/tests/i915/i915_vm_bind_capture.c
new file mode 100644
index 00000000..03385ce6
--- /dev/null
+++ b/tests/i915/i915_vm_bind_capture.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2022 Intel Corporation. All rights reserved.
+ */
+
+/** @file gem_vm_bind_capture.c
+ *
+ * This is the test for dump capture of VM_BIND mappings.
+ *
+ * The goal is to simply ensure that capture of persistent mappings
+ * works. This test in part is derived from gem_exec_capture.c
+ */
+
+#include <sched.h>
+
+#include "i915/gem.h"
+#include "i915/gem_create.h"
+#include "i915/gem_vm.h"
+#include "i915/i915_error_decode.h"
+#include "i915/i915_vm_bind.h"
+#include "igt.h"
+#include "igt_device.h"
+#include "igt_syncobj.h"
+#include "igt_sysfs.h"
+#include "igt_types.h"
+#include "intel_ctx.h"
+
+#define PAGE_SIZE 4096
+
+#define NUM_OBJS 3
+#define NUM_MAPS 4
+
+IGT_TEST_DESCRIPTION("Check that we capture the user specified persistent mappings on a hang");
+
+struct mappings {
+ uint32_t obj;
+ uint64_t va;
+ uint64_t offset;
+ uint64_t length;
+
+ uint32_t idx;
+ uint32_t expect;
+ bool found;
+};
+
+static int check_error_state(int dir, struct mappings *map, uint32_t num_maps)
+{
+ char *error, *str;
+ int blobs = 0;
+
+ errno = 0;
+ error = igt_sysfs_get(dir, "error");
+ igt_sysfs_set(dir, "error", "Begone!");
+ igt_assert(error);
+ igt_assert(errno != ENOMEM);
+ igt_debug("%s\n", error);
+
+ /* render ring --- user = 0x00000000 ffffd000 */
+ for (str = error; (str = strstr(str, "--- user = ")); ) {
+ uint32_t *data = NULL;
+ uint64_t addr;
+ unsigned long i, j, sz;
+ unsigned long start;
+ unsigned long end;
+
+ if (strncmp(str, "--- user = 0x", 13))
+ break;
+ str += 13;
+ addr = strtoul(str, &str, 16);
+ addr <<= 32;
+ addr |= strtoul(str + 1, &str, 16);
+ igt_assert(*str++ == '\n');
+
+ start = 0;
+ end = num_maps;
+ while (end > start) {
+ i = (end - start) / 2 + start;
+ if (map[i].va < addr)
+ start = i + 1;
+ else if (map[i].va > addr)
+ end = i;
+ else
+ break;
+ }
+
+ igt_assert(map[i].va == addr);
+ igt_assert(!map[i].found);
+ map[i].found = true;
+ igt_debug("offset:%"PRIx64", index:%d\n",
+ addr, map[i].idx);
+
+ /* gtt_page_sizes = 0x00010000 */
+ if (strncmp(str, "gtt_page_sizes = 0x", 19) == 0) {
+ str += 19 + 8;
+ igt_assert(*str++ == '\n');
+ }
+
+ if (!(*str == ':' || *str == '~'))
+ continue;
+
+ igt_debug("blob:%.64s\n", str);
+ sz = i915_ascii85_decode(str + 1, &data, *str == ':', &str);
+ igt_debug("Found addr 0x%lx sz 0x%lx\n", addr, sz);
+ igt_assert_eq(4 * sz, map[i].length);
+ igt_assert(*str++ == '\n');
+ str = strchr(str, '-');
+
+ for (j = 0; j < sz; j++)
+ igt_assert_eq(data[j], map[i].expect + j);
+
+ blobs++;
+ free(data);
+ }
+
+ free(error);
+ return blobs;
+}
+
+static int gem_recurse(uint32_t *batch, uint64_t batch_va)
+{
+ *batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
+ *batch++ = lower_32_bits(batch_va);
+ *batch++ = upper_32_bits(batch_va);
+ *batch = 0;
+
+ return 4 * sizeof(uint32_t);
+}
+
+static struct gem_engine_properties
+configure_hangs(int fd, const struct intel_execution_engine2 *e, int ctx_id)
+{
+ struct gem_engine_properties props;
+
+ /* Ensure fast hang detection */
+ props.engine = e;
+ props.preempt_timeout = 250;
+ props.heartbeat_interval = 500;
+ gem_engine_properties_configure(fd, &props);
+
+ /* Allow engine based resets and disable banning */
+ igt_allow_hang(fd, ctx_id, HANG_ALLOW_CAPTURE | HANG_WANT_ENGINE_RESET);
+
+ return props;
+}
+
+static void gem_reset(int fd, int dir, uint32_t ctx_id, uint32_t batch,
+ uint64_t batch_va, struct intel_execution_engine2 *e)
+{
+ struct drm_i915_gem_timeline_fence exec_fence = { };
+ struct drm_i915_gem_execbuffer3 execbuf = { };
+ uint64_t fence_value = 0;
+ uint32_t exec_syncobj;
+ uint32_t buf[20], len;
+
+ len = gem_recurse(buf, batch_va);
+ gem_write(fd, batch, 0, buf, len);
+
+ execbuf.ctx_id = ctx_id;
+ execbuf.batch_address = batch_va;
+ execbuf.engine_idx = e->flags;
+ execbuf.fence_count = 1;
+ execbuf.timeline_fences = to_user_pointer(&exec_fence);
+
+ exec_syncobj = syncobj_create(fd, 0);
+ exec_fence.handle = exec_syncobj;
+ exec_fence.flags = I915_TIMELINE_FENCE_SIGNAL;
+
+ gem_execbuf3(fd, &execbuf);
+
+ igt_assert(syncobj_timeline_wait(fd, &exec_syncobj, &fence_value, 1,
+ gettime_ns() + (2 * NSEC_PER_SEC),
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT, NULL));
+ syncobj_destroy(fd, exec_syncobj);
+}
+
+static void set_map(struct mappings *m, uint32_t idx, uint32_t obj, uint64_t va,
+ uint64_t offset, uint64_t length, uint32_t expect)
+{
+ m->idx = idx;
+ m->obj = obj;
+ m->va = va;
+ m->offset = offset;
+ m->length = length;
+ m->expect = expect;
+ igt_debug("Created mapping:0x%x - va 0x%lx handle %d offset 0x%lx length 0x%lx\n",
+ m->idx, m->va, m->obj, m->offset, m->length);
+}
+
+static uint32_t create_obj(int fd, struct gem_memory_region *mr, uint32_t size, void **addr)
+{
+ uint32_t handle;
+
+ if (!mr) {
+ igt_assert(posix_memalign(addr, PAGE_SIZE, size) == 0);
+ gem_userptr(fd, *addr, size, 0, 0, &handle);
+ } else {
+ handle = gem_create_in_memory_region_list(fd, size, 0, &mr->ci, 1);
+ *addr = gem_mmap__cpu(fd, handle, 0, size, PROT_WRITE);
+ }
+
+ return handle;
+}
+
+static void destroy_obj(int fd, uint32_t handle, uint32_t size, void *addr, bool is_userptr)
+{
+ if (!is_userptr)
+ igt_assert(gem_munmap(addr, size) == 0);
+
+ gem_close(fd, handle);
+
+ if (is_userptr)
+ free(addr);
+}
+
+static void run_vm_bind_capture(int fd, int dir, const intel_ctx_t *base_ctx,
+ struct gem_memory_region *mr,
+ struct intel_execution_engine2 *e)
+{
+ uint64_t obj_size = (mr ? mr->gtt_alignment : PAGE_SIZE) * 4;
+ struct mappings *m, map[NUM_MAPS * NUM_OBJS + 1] = { };
+ struct drm_i915_gem_context_param param = {
+ .param = I915_CONTEXT_PARAM_RECOVERABLE,
+ .value = 0,
+ };
+ struct gem_engine_properties saved_engine;
+ uint64_t batch_va, va, ahnd;
+ uint32_t i, obj[NUM_OBJS];
+ uint32_t *addr[NUM_OBJS];
+ const intel_ctx_t *ctx;
+ uint32_t vm_id, batch;
+
+ ctx = intel_ctx_create(fd, &base_ctx->cfg);
+ param.ctx_id = ctx->id;
+ gem_context_set_param(fd, ¶m);
+ vm_id = gem_vm_create_in_vm_bind_mode(fd);
+ gem_context_set_vm(fd, ctx->id, vm_id);
+
+ saved_engine = configure_hangs(fd, e, ctx->id);
+
+ ahnd = intel_allocator_open_full(fd, ctx->id, 0, 0,
+ INTEL_ALLOCATOR_SIMPLE,
+ ALLOC_STRATEGY_LOW_TO_HIGH,
+ obj_size);
+
+ /* Create objects and mappings */
+ batch = gem_create(fd, PAGE_SIZE);
+ batch_va = CANONICAL(get_offset(ahnd, batch, PAGE_SIZE, 0));
+ for (i = 0, m = map; i < NUM_OBJS; i++) {
+ obj[i] = create_obj(fd, mr, obj_size, (void **)&addr[i]);
+ va = CANONICAL(get_offset(ahnd, obj[i], obj_size * NUM_MAPS, 0));
+
+ for (unsigned int n = 0; n < obj_size / sizeof(*addr[0]); n++)
+ addr[i][n] = (i << 24) + n;
+
+ /* Full bind */
+ set_map(m++, 0 + (i * NUM_MAPS), obj[i], va, 0, obj_size, (i << 24));
+ /* Full bind with alias VA */
+ set_map(m++, 1 + (i * NUM_MAPS), obj[i], va + obj_size, 0, obj_size, (i << 24));
+ /* Partial bind */
+ set_map(m++, 2 + (i * NUM_MAPS), obj[i], va + (obj_size * 2), 0, obj_size / 2, (i << 24));
+ /* Partial bind with offset */
+ set_map(m++, 3 + (i * NUM_MAPS), obj[i], va + (obj_size * 3), obj_size / 2, obj_size / 2,
+ (i << 24) + (obj_size / 2) / sizeof(*addr[0]));
+ }
+ m->length = 0;
+
+ i915_vm_bind(fd, vm_id, batch_va, batch, 0, PAGE_SIZE, 0, 0, 0);
+ /* Bind mappings with capture request */
+ for (m = map; m->length; m++)
+ i915_vm_bind(fd, vm_id, m->va, m->obj, m->offset, m->length,
+ I915_GEM_VM_BIND_CAPTURE, 0, 0);
+
+ /* Cause reset and check the dump */
+ gem_reset(fd, dir, ctx->id, batch, batch_va, e);
+ igt_assert_eq(check_error_state(dir, map, NUM_OBJS * NUM_MAPS), NUM_OBJS * NUM_MAPS);
+
+ for (m = map; m->length; m++)
+ i915_vm_unbind(fd, vm_id, m->va, m->length);
+ i915_vm_unbind(fd, vm_id, batch_va, PAGE_SIZE);
+
+ put_ahnd(ahnd);
+ gem_close(fd, batch);
+ for (i = 0; i < NUM_OBJS; i++)
+ destroy_obj(fd, obj[i], obj_size, (void *)addr[i], !mr);
+
+ gem_engine_properties_restore(fd, &saved_engine);
+
+ gem_vm_destroy(fd, vm_id);
+ intel_ctx_destroy(fd, ctx);
+}
+
+static int has_userptr(int fd)
+{
+ uint32_t handle = 0;
+ void *ptr;
+ int ret;
+
+ assert(posix_memalign(&ptr, PAGE_SIZE, PAGE_SIZE) == 0);
+ ret = __gem_userptr(fd, ptr, PAGE_SIZE, 0, 0, &handle);
+ if (ret != 0) {
+ free(ptr);
+ return 0;
+ }
+
+ gem_close(fd, handle);
+ free(ptr);
+
+ return handle != 0;
+}
+
+static size_t safer_strlen(const char *s)
+{
+ return s ? strlen(s) : 0;
+}
+
+igt_main
+{
+ struct intel_execution_engine2 *e;
+ const intel_ctx_t *ctx = NULL;
+ igt_fd_t(dir);
+ igt_fd_t(fd);
+
+ igt_fixture {
+ fd = drm_open_driver(DRIVER_INTEL);
+ igt_require_gem(fd);
+ igt_require(i915_vm_bind_version(fd) == 1);
+ igt_allow_hang(fd, 0, HANG_ALLOW_CAPTURE | HANG_WANT_ENGINE_RESET);
+
+ dir = igt_sysfs_open(fd);
+ igt_require(igt_sysfs_set(dir, "error", "Begone!"));
+ igt_require(safer_strlen(igt_sysfs_get(dir, "error")) > 0);
+ ctx = intel_ctx_create_all_physical(fd);
+ }
+
+ igt_describe("Basic vm_bind capture test");
+ igt_subtest_with_dynamic("basic") {
+ for_each_ctx_engine(fd, ctx, e) {
+
+ for_each_memory_region(r, fd) {
+ if (r->ci.memory_instance)
+ continue;
+
+ igt_dynamic_f("%s-%s", e->name, r->name)
+ run_vm_bind_capture(fd, dir, ctx, r, e);
+ }
+
+ if (has_userptr(fd)) {
+ /* Use NULL memory region for userptr */
+ igt_dynamic_f("%s-userptr", e->name)
+ run_vm_bind_capture(fd, dir, ctx, NULL, e);
+ }
+ }
+ }
+
+ igt_fixture {
+ intel_ctx_destroy(fd, ctx);
+ }
+}
diff --git a/tests/meson.build b/tests/meson.build
index 2ac10df2..facf43e7 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -217,6 +217,7 @@ i915_progs = [
'i915_selftest',
'i915_suspend',
'i915_vm_bind_basic',
+ 'i915_vm_bind_capture',
'i915_vm_bind_sanity',
'kms_big_fb',
'kms_big_joiner' ,
--
2.39.0
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