From 506d683da138a7b90f5e338d522012f00d3145e9 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 28 Jan 2016 11:46:21 +0000 Subject: [PATCH] tests: Add gem_exec_reloc The first steps towards basic relocation handling. In today's edition, we ask how well does the kernel fare if we pass it relocations via mmappings of our buffer objects. Signed-off-by: Chris Wilson --- tests/Makefile.sources | 1 + tests/gem_exec_reloc.c | 230 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 231 insertions(+) create mode 100644 tests/gem_exec_reloc.c diff --git a/tests/Makefile.sources b/tests/Makefile.sources index 446e5e3e..d431ebff 100644 --- a/tests/Makefile.sources +++ b/tests/Makefile.sources @@ -32,6 +32,7 @@ TESTS_progs_M = \ gem_exec_nop \ gem_exec_params \ gem_exec_parse \ + gem_exec_reloc \ gem_fenced_exec_thrash \ gem_fence_thrash \ gem_fence_upload \ diff --git a/tests/gem_exec_reloc.c b/tests/gem_exec_reloc.c new file mode 100644 index 00000000..140192d9 --- /dev/null +++ b/tests/gem_exec_reloc.c @@ -0,0 +1,230 @@ +/* + * Copyright © 2016 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" + +IGT_TEST_DESCRIPTION("Basic sanity check of execbuf-ioctl relocations."); + +static uint32_t find_last_set(uint64_t x) +{ + uint32_t i = 0; + while (x) { + x >>= 1; + i++; + } + return i; +} + +static void write_dword(int fd, + uint32_t target_handle, + uint64_t target_offset, + uint32_t value) +{ + int gen = intel_gen(intel_get_drm_devid(fd)); + struct drm_i915_gem_execbuffer2 execbuf; + struct drm_i915_gem_exec_object2 obj[2]; + struct drm_i915_gem_relocation_entry reloc; + uint32_t buf[16]; + int i; + + memset(obj, 0, sizeof(obj)); + obj[0].handle = target_handle; + obj[1].handle = gem_create(fd, 4096); + + i = 0; + buf[i++] = MI_STORE_DWORD_IMM; + if (gen >= 8) { + buf[i++] = target_offset; + buf[i++] = target_offset >> 32; + } else if (gen >= 4) { + buf[i++] = 0; + buf[i++] = target_offset; + } else { + buf[i-1]--; + buf[i-1] |= 1 << 22; + buf[i++] = target_offset; + } + buf[i++] = value; + buf[i++] = MI_BATCH_BUFFER_END; + gem_write(fd, obj[1].handle, 0, buf, sizeof(buf)); + + memset(&reloc, 0, sizeof(reloc)); + if (gen >= 8 || gen < 4) + reloc.offset = sizeof(uint32_t); + else + reloc.offset = 2*sizeof(uint32_t); + reloc.target_handle = target_handle; + reloc.delta = target_offset; + reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION; + reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION; + + obj[1].relocation_count = 1; + obj[1].relocs_ptr = (uintptr_t)&reloc; + + memset(&execbuf, 0, sizeof(execbuf)); + execbuf.buffers_ptr = (uintptr_t)obj; + execbuf.buffer_count = 2; + gem_execbuf(fd, &execbuf); + gem_close(fd, obj[1].handle); +} + +static void from_mmap(int fd, uint64_t size, int use_gtt) +{ + uint32_t bbe = MI_BATCH_BUFFER_END; + struct drm_i915_gem_execbuffer2 execbuf; + struct drm_i915_gem_exec_object2 obj; + struct drm_i915_gem_relocation_entry *relocs; + uint64_t value; + uint64_t max, i; + + intel_require_memory(1, size, CHECK_RAM); + + memset(&obj, 0, sizeof(obj)); + obj.handle = gem_create(fd, 4096); + gem_write(fd, obj.handle, 0, &bbe, sizeof(bbe)); + + max = size / sizeof(*relocs); + if (use_gtt < 0) { + relocs = mmap(0, size, + PROT_WRITE, MAP_PRIVATE | MAP_ANON, + -1, 0); + igt_assert(relocs != (void *)-1); + } else if (use_gtt) { + uint32_t reloc_handle; + + reloc_handle = gem_create(fd, size); + relocs = gem_mmap__gtt(fd, reloc_handle, size, PROT_WRITE); + gem_set_domain(fd, reloc_handle, + I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT); + gem_close(fd, reloc_handle); + } else { + uint32_t reloc_handle; + + reloc_handle = gem_create(fd, size); + relocs = gem_mmap__cpu(fd, reloc_handle, 0, size, PROT_WRITE); + gem_set_domain(fd, reloc_handle, + I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU); + gem_close(fd, reloc_handle); + } + + for (i = 0; i < max; i++) { + relocs[i].target_handle = obj.handle; + relocs[i].presumed_offset = 0; + relocs[i].offset = 1024; + relocs[i].delta = i; + relocs[i].read_domains = I915_GEM_DOMAIN_INSTRUCTION; + relocs[i].write_domain = 0; + } + obj.relocation_count = max; + obj.relocs_ptr = (uintptr_t)relocs; + + memset(&execbuf, 0, sizeof(execbuf)); + execbuf.buffers_ptr = (uintptr_t)&obj; + execbuf.buffer_count = 1; + gem_execbuf(fd, &execbuf); + gem_read(fd, obj.handle, 1024, &value, sizeof(value)); + gem_close(fd, obj.handle); + + igt_assert_eq_u64(value, obj.offset + max - 1); + for (i = 0; i < max; i++) { + if (relocs[i].presumed_offset == ~0ull) + continue; + + igt_assert_eq_u64(relocs[i].presumed_offset, obj.offset); + } + munmap(relocs, size); +} + +static void from_gpu(int fd) +{ + uint32_t bbe = MI_BATCH_BUFFER_END; + struct drm_i915_gem_execbuffer2 execbuf; + struct drm_i915_gem_exec_object2 obj; + struct drm_i915_gem_relocation_entry *relocs; + uint32_t reloc_handle; + uint64_t value; + + memset(&obj, 0, sizeof(obj)); + obj.handle = gem_create(fd, 4096); + gem_write(fd, obj.handle, 0, &bbe, sizeof(bbe)); + + reloc_handle = gem_create(fd, 4096); + write_dword(fd, + reloc_handle, + offsetof(struct drm_i915_gem_relocation_entry, + target_handle), + obj.handle); + write_dword(fd, + reloc_handle, + offsetof(struct drm_i915_gem_relocation_entry, + offset), + 1024); + write_dword(fd, + reloc_handle, + offsetof(struct drm_i915_gem_relocation_entry, + read_domains), + I915_GEM_DOMAIN_INSTRUCTION); + + relocs = gem_mmap__cpu(fd, reloc_handle, 0, 4096, PROT_READ); + gem_set_domain(fd, reloc_handle, + I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU); + gem_close(fd, reloc_handle); + + obj.relocation_count = 1; + obj.relocs_ptr = (uintptr_t)relocs; + + memset(&execbuf, 0, sizeof(execbuf)); + execbuf.buffers_ptr = (uintptr_t)&obj; + execbuf.buffer_count = 1; + gem_execbuf(fd, &execbuf); + gem_read(fd, obj.handle, 1024, &value, sizeof(value)); + gem_close(fd, obj.handle); + + igt_assert_eq_u64(value, obj.offset); + igt_assert_eq_u64(relocs->presumed_offset, obj.offset); + munmap(relocs, 4096); +} + +igt_main +{ + uint64_t size; + int fd = -1; + + igt_fixture + fd = drm_open_driver(DRIVER_INTEL); + + for (size = 4096; size <= 4ull*1024*1024*1024; size <<= 1) { + igt_subtest_f("mmap-%u", find_last_set(size) - 1) + from_mmap(fd, size, -1); + igt_subtest_f("cpu-%u", find_last_set(size) - 1) + from_mmap(fd, size, 0); + igt_subtest_f("gtt-%u", find_last_set(size) - 1) + from_mmap(fd, size, 1); + } + + igt_subtest("gpu") + from_gpu(fd); + + igt_fixture + close(fd); +}