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, uint32_t 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, uint32_t flags)
  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    gem_mmap.flags = flags;
  98
  99    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_mmap);
 100    if (ret != 0) {
 101       /* FIXME: Is NULL the right error return? Cf MAP_INVALID */
 102       return NULL;
 103    }
 104
 105    VG(VALGRIND_MALLOCLIKE_BLOCK(gem_mmap.addr_ptr, gem_mmap.size, 0, 1));
 106    return (void *)(uintptr_t) gem_mmap.addr_ptr;
 107 }
 108
 109 /* This is just a wrapper around munmap, but it also notifies valgrind that
 110  * this map is no longer valid.  Pair this with anv_gem_mmap().
 111  */
 112 void
 113 anv_gem_munmap(void *p, uint64_t size)
 114 {
 115    VG(VALGRIND_FREELIKE_BLOCK(p, 0));
 116    munmap(p, size);
 117 }
 118
 119 uint32_t
 120 anv_gem_userptr(struct anv_device *device, void *mem, size_t size)
 121 {
 122    struct drm_i915_gem_userptr userptr;
 123    int ret;
 124
 125    VG_CLEAR(userptr);
 126    userptr.user_ptr = (__u64)((unsigned long) mem);
 127    userptr.user_size = size;
 128    userptr.flags = 0;
 129
 130    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr);
 131    if (ret == -1)
 132       return 0;
 133
 134    return userptr.handle;
 135 }
 136
 137 int
 138 anv_gem_set_caching(struct anv_device *device,
 139                     uint32_t gem_handle, uint32_t caching)
 140 {
 141    struct drm_i915_gem_caching gem_caching;
 142
 143    VG_CLEAR(gem_caching);
 144    gem_caching.handle = gem_handle;
 145    gem_caching.caching = caching;
 146
 147    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_CACHING, &gem_caching);
 148 }
 149
 150 int
 151 anv_gem_set_domain(struct anv_device *device, uint32_t gem_handle,
 152                    uint32_t read_domains, uint32_t write_domain)
 153 {
 154    struct drm_i915_gem_set_domain gem_set_domain;
 155
 156    VG_CLEAR(gem_set_domain);
 157    gem_set_domain.handle = gem_handle;
 158    gem_set_domain.read_domains = read_domains;
 159    gem_set_domain.write_domain = write_domain;
 160
 161    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &gem_set_domain);
 162 }
 163
 164 /**
 165  * On error, \a timeout_ns holds the remaining time.
 166  */
 167 int
 168 anv_gem_wait(struct anv_device *device, uint32_t gem_handle, int64_t *timeout_ns)
 169 {
 170    struct drm_i915_gem_wait wait;
 171    int ret;
 172
 173    VG_CLEAR(wait);
 174    wait.bo_handle = gem_handle;
 175    wait.timeout_ns = *timeout_ns;
 176    wait.flags = 0;
 177
 178    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
 179    *timeout_ns = wait.timeout_ns;
 180
 181    return ret;
 182 }
 183
 184 int
 185 anv_gem_execbuffer(struct anv_device *device,
 186                    struct drm_i915_gem_execbuffer2 *execbuf)
 187 {
 188    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf);
 189 }
 190
 191 int
 192 anv_gem_set_tiling(struct anv_device *device,
 193                    uint32_t gem_handle, uint32_t stride, uint32_t tiling)
 194 {
 195    struct drm_i915_gem_set_tiling set_tiling;
 196    int ret;
 197
 198    /* set_tiling overwrites the input on the error path, so we have to open
 199     * code anv_ioctl.
 200     */
 201
 202    do {
 203       VG_CLEAR(set_tiling);
 204       set_tiling.handle = gem_handle;
 205       set_tiling.tiling_mode = tiling;
 206       set_tiling.stride = stride;
 207
 208       ret = ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 209    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 210
 211    return ret;
 212 }
 213
 214 int
 215 anv_gem_get_param(int fd, uint32_t param)
 216 {
 217    drm_i915_getparam_t gp;
 218    int ret, tmp;
 219
 220    VG_CLEAR(gp);
 221    gp.param = param;
 222    gp.value = &tmp;
 223    ret = anv_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
 224    if (ret == 0)
 225       return tmp;
 226
 227    return 0;
 228 }
 229
 230 bool
 231 anv_gem_get_bit6_swizzle(int fd, uint32_t tiling)
 232 {
 233    struct drm_gem_close close;
 234    int ret;
 235
 236    struct drm_i915_gem_create gem_create;
 237    VG_CLEAR(gem_create);
 238    gem_create.size = 4096;
 239
 240    if (anv_ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create)) {
 241       assert(!"Failed to create GEM BO");
 242       return false;
 243    }
 244
 245    bool swizzled = false;
 246
 247    /* set_tiling overwrites the input on the error path, so we have to open
 248     * code anv_ioctl.
 249     */
 250    struct drm_i915_gem_set_tiling set_tiling;
 251    do {
 252       VG_CLEAR(set_tiling);
 253       set_tiling.handle = gem_create.handle;
 254       set_tiling.tiling_mode = tiling;
 255       set_tiling.stride = tiling == I915_TILING_X ? 512 : 128;
 256
 257       ret = ioctl(fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 258    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 259
 260    if (ret != 0) {
 261       assert(!"Failed to set BO tiling");
 262       goto close_and_return;
 263    }
 264
 265    struct drm_i915_gem_get_tiling get_tiling;
 266    VG_CLEAR(get_tiling);
 267    get_tiling.handle = gem_create.handle;
 268
 269    if (anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling)) {
 270       assert(!"Failed to get BO tiling");
 271       goto close_and_return;
 272    }
 273
 274    swizzled = get_tiling.swizzle_mode != I915_BIT_6_SWIZZLE_NONE;
 275
 276 close_and_return:
 277
 278    VG_CLEAR(close);
 279    close.handle = gem_create.handle;
 280    anv_ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close);
 281
 282    return swizzled;
 283 }
 284
 285 int
 286 anv_gem_create_context(struct anv_device *device)
 287 {
 288    struct drm_i915_gem_context_create create;
 289    int ret;
 290
 291    VG_CLEAR(create);
 292
 293    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
 294    if (ret == -1)
 295       return -1;
 296
 297    return create.ctx_id;
 298 }
 299
 300 int
 301 anv_gem_destroy_context(struct anv_device *device, int context)
 302 {
 303    struct drm_i915_gem_context_destroy destroy;
 304
 305    VG_CLEAR(destroy);
 306    destroy.ctx_id = context;
 307
 308    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &destroy);
 309 }
 310
 311 int
 312 anv_gem_get_aperture(int fd, uint64_t *size)
 313 {
 314    struct drm_i915_gem_get_aperture aperture;
 315    int ret;
 316
 317    VG_CLEAR(aperture);
 318    ret = anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
 319    if (ret == -1)
 320       return -1;
 321
 322    *size = aperture.aper_available_size;
 323
 324    return 0;
 325 }
 326
 327 int
 328 anv_gem_handle_to_fd(struct anv_device *device, uint32_t gem_handle)
 329 {
 330    struct drm_prime_handle args;
 331    int ret;
 332
 333    VG_CLEAR(args);
 334    args.handle = gem_handle;
 335    args.flags = DRM_CLOEXEC;
 336
 337    ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 338    if (ret == -1)
 339       return -1;
 340
 341    return args.fd;
 342 }
 343
 344 uint32_t
 345 anv_gem_fd_to_handle(struct anv_device *device, int fd)
 346 {
 347    struct drm_prime_handle args;
 348    int ret;
 349
 350    VG_CLEAR(args);
 351    args.fd = fd;
 352
 353    ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
 354    if (ret == -1)
 355       return 0;
 356
 357    return args.handle;
 358 }