sys/external/bsd/drm/dist/tests/gem_readwrite.c

   1 /*
   2  * Copyright © 2008 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  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <assert.h>
  32 #include <fcntl.h>
  33 #include <inttypes.h>
  34 #include <errno.h>
  35 #include <sys/stat.h>
  36 #include "drm.h"
  37 #include "i915_drm.h"
  38
  39 #define OBJECT_SIZE 16384
  40
  41 int do_read(int fd, int handle, void *buf, int offset, int size)
  42 {
  43         struct drm_i915_gem_pread read;
  44
  45         /* Ensure that we don't have any convenient data in buf in case
  46          * we fail.
  47          */
  48         memset(buf, 0xd0, size);
  49
  50         memset(&read, 0, sizeof(read));
  51         read.handle = handle;
  52         read.data_ptr = (uintptr_t)buf;
  53         read.size = size;
  54         read.offset = offset;
  55
  56         return ioctl(fd, DRM_IOCTL_I915_GEM_PREAD, &read);
  57 }
  58
  59 int do_write(int fd, int handle, void *buf, int offset, int size)
  60 {
  61         struct drm_i915_gem_pwrite write;
  62
  63         memset(&write, 0, sizeof(write));
  64         write.handle = handle;
  65         write.data_ptr = (uintptr_t)buf;
  66         write.size = size;
  67         write.offset = offset;
  68
  69         return ioctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &write);
  70 }
  71
  72 int main(int argc, char **argv)
  73 {
  74         int fd;
  75         struct drm_i915_gem_create create;
  76         uint8_t expected[OBJECT_SIZE];
  77         uint8_t buf[OBJECT_SIZE];
  78         int ret;
  79         int handle;
  80
  81         fd = drm_open_matching("8086:*", 0);
  82         if (fd < 0) {
  83                 fprintf(stderr, "failed to open intel drm device, skipping\n");
  84                 return 0;
  85         }
  86
  87         memset(&create, 0, sizeof(create));
  88         create.size = OBJECT_SIZE;
  89         ret = ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create);
  90         assert(ret == 0);
  91         handle = create.handle;
  92
  93         printf("Testing contents of newly created object.\n");
  94         ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
  95         assert(ret == 0);
  96         memset(&expected, 0, sizeof(expected));
  97         assert(memcmp(expected, buf, sizeof(expected)) == 0);
  98
  99         printf("Testing read beyond end of buffer.\n");
 100         ret = do_read(fd, handle, buf, OBJECT_SIZE / 2, OBJECT_SIZE);
 101         printf("%d %d\n", ret, errno);
 102         assert(ret == -1 && errno == EINVAL);
 103
 104         printf("Testing full write of buffer\n");
 105         memset(buf, 0, sizeof(buf));
 106         memset(buf + 1024, 0x01, 1024);
 107         memset(expected + 1024, 0x01, 1024);
 108         ret = do_write(fd, handle, buf, 0, OBJECT_SIZE);
 109         assert(ret == 0);
 110         ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
 111         assert(ret == 0);
 112         assert(memcmp(buf, expected, sizeof(buf)) == 0);
 113
 114         printf("Testing partial write of buffer\n");
 115         memset(buf + 4096, 0x02, 1024);
 116         memset(expected + 4096, 0x02, 1024);
 117         ret = do_write(fd, handle, buf + 4096, 4096, 1024);
 118         assert(ret == 0);
 119         ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
 120         assert(ret == 0);
 121         assert(memcmp(buf, expected, sizeof(buf)) == 0);
 122
 123         printf("Testing partial read of buffer\n");
 124         ret = do_read(fd, handle, buf, 512, 1024);
 125         assert(ret == 0);
 126         assert(memcmp(buf, expected + 512, 1024) == 0);
 127
 128         printf("Testing read of bad buffer handle\n");
 129         ret = do_read(fd, 1234, buf, 0, 1024);
 130         assert(ret == -1 && errno == EBADF);
 131
 132         printf("Testing write of bad buffer handle\n");
 133         ret = do_write(fd, 1234, buf, 0, 1024);
 134         assert(ret == -1 && errno == EBADF);
 135
 136         close(fd);
 137
 138         return 0;
 139 }