tests/gem_madvise.c

   1 /*
   2  * Copyright © 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Chris Wilson <chris@chris-wilson.co.uk>
  25  *
  26  */
  27
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <inttypes.h>
  34 #include <errno.h>
  35 #include <setjmp.h>
  36 #include <signal.h>
  37
  38 #include "drm.h"
  39 #include "ioctl_wrappers.h"
  40 #include "drmtest.h"
  41
  42 #define OBJECT_SIZE (1024*1024)
  43
  44 /* Testcase: checks that the kernel reports EFAULT when trying to use purged bo
  45  *
  46  */
  47
  48 static jmp_buf jmp;
  49
  50 static void sigtrap(int sig)
  51 {
  52         longjmp(jmp, sig);
  53 }
  54
  55 static void
  56 dontneed_before_mmap(void)
  57 {
  58         int fd = drm_open_any();
  59         uint32_t handle;
  60         char *ptr;
  61
  62         handle = gem_create(fd, OBJECT_SIZE);
  63         gem_madvise(fd, handle, I915_MADV_DONTNEED);
  64         ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
  65         igt_assert(ptr == NULL);
  66         igt_assert(errno == EFAULT);
  67         close(fd);
  68 }
  69
  70 static void
  71 dontneed_after_mmap(void)
  72 {
  73         int fd = drm_open_any();
  74         uint32_t handle;
  75         char *ptr;
  76
  77         handle = gem_create(fd, OBJECT_SIZE);
  78         ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
  79         igt_assert(ptr != NULL);
  80         gem_madvise(fd, handle, I915_MADV_DONTNEED);
  81         close(fd);
  82
  83         signal(SIGBUS, sigtrap);
  84         switch (setjmp(jmp)) {
  85         case SIGBUS:
  86                 break;
  87         case 0:
  88                 *ptr = 0;
  89         default:
  90                 igt_assert(!"reached");
  91                 break;
  92         }
  93         munmap(ptr, OBJECT_SIZE);
  94         signal(SIGBUS, SIG_DFL);
  95 }
  96
  97 static void
  98 dontneed_before_pwrite(void)
  99 {
 100         int fd = drm_open_any();
 101         uint32_t buf[] = { MI_BATCH_BUFFER_END, 0 };
 102         struct drm_i915_gem_pwrite gem_pwrite;
 103
 104         gem_pwrite.handle = gem_create(fd, OBJECT_SIZE);
 105         gem_pwrite.offset = 0;
 106         gem_pwrite.size = sizeof(buf);
 107         gem_pwrite.data_ptr = (uintptr_t)buf;
 108         gem_madvise(fd, gem_pwrite.handle, I915_MADV_DONTNEED);
 109
 110         igt_assert(drmIoctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &gem_pwrite));
 111         igt_assert(errno == EFAULT);
 112
 113         gem_close(fd, gem_pwrite.handle);
 114         close(fd);
 115 }
 116
 117 static void
 118 dontneed_before_exec(void)
 119 {
 120         int fd = drm_open_any();
 121         struct drm_i915_gem_execbuffer2 execbuf;
 122         struct drm_i915_gem_exec_object2 exec;
 123         uint32_t buf[] = { MI_BATCH_BUFFER_END, 0 };
 124
 125         memset(&execbuf, 0, sizeof(execbuf));
 126         memset(&exec, 0, sizeof(exec));
 127
 128         exec.handle = gem_create(fd, OBJECT_SIZE);
 129         gem_write(fd, exec.handle, 0, buf, sizeof(buf));
 130         gem_madvise(fd, exec.handle, I915_MADV_DONTNEED);
 131
 132         execbuf.buffers_ptr = (uintptr_t)&exec;
 133         execbuf.buffer_count = 1;
 134         gem_execbuf(fd, &execbuf);
 135
 136         gem_close(fd, exec.handle);
 137         close(fd);
 138 }
 139
 140 igt_main
 141 {
 142         igt_skip_on_simulation();
 143
 144         igt_subtest("dontneed-before-mmap")
 145                 dontneed_before_mmap();
 146
 147         igt_subtest("dontneed-after-mmap")
 148                 dontneed_after_mmap();
 149
 150         igt_subtest("dontneed-before-pwrite")
 151                 dontneed_before_pwrite();
 152
 153         igt_subtest("dontneed-before-exec")
 154                 dontneed_before_exec();
 155 }