src/vulkan/anv_gem.c

   1 /*
   2  * Copyright © 2015 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
  24 #define _DEFAULT_SOURCE
  25
  26 #include <sys/ioctl.h>
  27 #include <sys/mman.h>
  28 #include <string.h>
  29 #include <errno.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32
  33 #include "anv_private.h"
  34
  35 #define VG_CLEAR(s) VG(memset(&s, 0, sizeof(s)))
  36
  37 static int
  38 anv_ioctl(int fd, unsigned long request, void *arg)
  39 {
  40    int ret;
  41
  42    do {
  43       ret = ioctl(fd, request, arg);
  44    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
  45
  46    return ret;
  47 }
  48
  49 /**
  50  * Wrapper around DRM_IOCTL_I915_GEM_CREATE.
  51  *
  52  * Return gem handle, or 0 on failure. Gem handles are never 0.
  53  */
  54 uint32_t
  55 anv_gem_create(struct anv_device *device, size_t size)
  56 {
  57    struct drm_i915_gem_create gem_create;
  58    int ret;
  59
  60    VG_CLEAR(gem_create);
  61    gem_create.size = size;
  62
  63    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
  64    if (ret != 0) {
  65       /* FIXME: What do we do if this fails? */
  66       return 0;
  67    }
  68
  69    return gem_create.handle;
  70 }
  71
  72 void
  73 anv_gem_close(struct anv_device *device, int gem_handle)
  74 {
  75    struct drm_gem_close close;
  76
  77    VG_CLEAR(close);
  78    close.handle = gem_handle;
  79    anv_ioctl(device->fd, DRM_IOCTL_GEM_CLOSE, &close);
  80 }
  81
  82 /**
  83  * Wrapper around DRM_IOCTL_I915_GEM_MMAP.
  84  */
  85 void*
  86 anv_gem_mmap(struct anv_device *device, uint32_t gem_handle,
  87              uint64_t offset, uint64_t size)
  88 {
  89    struct drm_i915_gem_mmap gem_mmap;
  90    int ret;
  91
  92    gem_mmap.handle = gem_handle;
  93    VG_CLEAR(gem_mmap.pad);
  94    gem_mmap.offset = offset;
  95    gem_mmap.size = size;
  96    VG_CLEAR(gem_mmap.addr_ptr);
  97
  98 #ifdef I915_MMAP_WC
  99    gem_mmap.flags = 0;
 100 #endif
 101
 102    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_mmap);
 103    if (ret != 0) {
 104       /* FIXME: Is NULL the right error return? Cf MAP_INVALID */
 105       return NULL;
 106    }
 107
 108    VG(VALGRIND_MALLOCLIKE_BLOCK(gem_mmap.addr_ptr, gem_mmap.size, 0, 1));
 109    return (void *)(uintptr_t) gem_mmap.addr_ptr;
 110 }
 111
 112 /* This is just a wrapper around munmap, but it also notifies valgrind that
 113  * this map is no longer valid.  Pair this with anv_gem_mmap().
 114  */
 115 void
 116 anv_gem_munmap(void *p, uint64_t size)
 117 {
 118    VG(VALGRIND_FREELIKE_BLOCK(p, 0));
 119    munmap(p, size);
 120 }
 121
 122 int
 123 anv_gem_userptr(struct anv_device *device, void *mem, size_t size)
 124 {
 125    struct drm_i915_gem_userptr userptr;
 126    int ret;
 127
 128    VG_CLEAR(userptr);
 129    userptr.user_ptr = (__u64)((unsigned long) mem);
 130    userptr.user_size = size;
 131    userptr.flags = 0;
 132
 133    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr);
 134    if (ret == -1)
 135       return 0;
 136
 137    return userptr.handle;
 138 }
 139
 140 /**
 141  * On error, \a timeout_ns holds the remaining time.
 142  */
 143 int
 144 anv_gem_wait(struct anv_device *device, int gem_handle, int64_t *timeout_ns)
 145 {
 146    struct drm_i915_gem_wait wait;
 147    int ret;
 148
 149    VG_CLEAR(wait);
 150    wait.bo_handle = gem_handle;
 151    wait.timeout_ns = *timeout_ns;
 152    wait.flags = 0;
 153
 154    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
 155    *timeout_ns = wait.timeout_ns;
 156
 157    return ret;
 158 }
 159
 160 int
 161 anv_gem_execbuffer(struct anv_device *device,
 162                    struct drm_i915_gem_execbuffer2 *execbuf)
 163 {
 164    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf);
 165 }
 166
 167 int
 168 anv_gem_set_tiling(struct anv_device *device,
 169                    int gem_handle, uint32_t stride, uint32_t tiling)
 170 {
 171    struct drm_i915_gem_set_tiling set_tiling;
 172    int ret;
 173
 174    /* set_tiling overwrites the input on the error path, so we have to open
 175     * code anv_ioctl.
 176     */
 177
 178    do {
 179       VG_CLEAR(set_tiling);
 180       set_tiling.handle = gem_handle;
 181       set_tiling.tiling_mode = I915_TILING_X;
 182       set_tiling.stride = stride;
 183
 184       ret = ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 185    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 186
 187    return ret;
 188 }
 189
 190 int
 191 anv_gem_get_param(int fd, uint32_t param)
 192 {
 193    drm_i915_getparam_t gp;
 194    int ret, tmp;
 195
 196    VG_CLEAR(gp);
 197    gp.param = param;
 198    gp.value = &tmp;
 199    ret = anv_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
 200    if (ret == 0)
 201       return tmp;
 202
 203    return 0;
 204 }
 205
 206 int
 207 anv_gem_create_context(struct anv_device *device)
 208 {
 209    struct drm_i915_gem_context_create create;
 210    int ret;
 211
 212    VG_CLEAR(create);
 213
 214    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
 215    if (ret == -1)
 216       return -1;
 217
 218    return create.ctx_id;
 219 }
 220
 221 int
 222 anv_gem_destroy_context(struct anv_device *device, int context)
 223 {
 224    struct drm_i915_gem_context_destroy destroy;
 225
 226    VG_CLEAR(destroy);
 227    destroy.ctx_id = context;
 228
 229    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &destroy);
 230 }
 231
 232 int
 233 anv_gem_get_aperture(int fd, uint64_t *size)
 234 {
 235    struct drm_i915_gem_get_aperture aperture;
 236    int ret;
 237
 238    VG_CLEAR(aperture);
 239    ret = anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
 240    if (ret == -1)
 241       return -1;
 242
 243    *size = aperture.aper_available_size;
 244
 245    return 0;
 246 }
 247
 248 int
 249 anv_gem_handle_to_fd(struct anv_device *device, int gem_handle)
 250 {
 251    struct drm_prime_handle args;
 252    int ret;
 253
 254    VG_CLEAR(args);
 255    args.handle = gem_handle;
 256    args.flags = DRM_CLOEXEC;
 257
 258    ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 259    if (ret == -1)
 260       return -1;
 261
 262    return args.fd;
 263 }
 264
 265 int
 266 anv_gem_fd_to_handle(struct anv_device *device, int fd)
 267 {
 268    struct drm_prime_handle args;
 269    int ret;
 270
 271    VG_CLEAR(args);
 272    args.fd = fd;
 273
 274    ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
 275    if (ret == -1)
 276       return 0;
 277
 278    return args.handle;
 279 }