src/intel/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 #include <sys/ioctl.h>
  25 #include <sys/mman.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <unistd.h>
  29 #include <fcntl.h>
  30
  31 #include "anv_private.h"
  32
  33 static int
  34 anv_ioctl(int fd, unsigned long request, void *arg)
  35 {
  36    int ret;
  37
  38    do {
  39       ret = ioctl(fd, request, arg);
  40    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
  41
  42    return ret;
  43 }
  44
  45 /**
  46  * Wrapper around DRM_IOCTL_I915_GEM_CREATE.
  47  *
  48  * Return gem handle, or 0 on failure. Gem handles are never 0.
  49  */
  50 uint32_t
  51 anv_gem_create(struct anv_device *device, size_t size)
  52 {
  53    struct drm_i915_gem_create gem_create = {
  54       .size = size,
  55    };
  56
  57    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
  58    if (ret != 0) {
  59       /* FIXME: What do we do if this fails? */
  60       return 0;
  61    }
  62
  63    return gem_create.handle;
  64 }
  65
  66 void
  67 anv_gem_close(struct anv_device *device, uint32_t gem_handle)
  68 {
  69    struct drm_gem_close close = {
  70       .handle = gem_handle,
  71    };
  72
  73    anv_ioctl(device->fd, DRM_IOCTL_GEM_CLOSE, &close);
  74 }
  75
  76 /**
  77  * Wrapper around DRM_IOCTL_I915_GEM_MMAP.
  78  */
  79 void*
  80 anv_gem_mmap(struct anv_device *device, uint32_t gem_handle,
  81              uint64_t offset, uint64_t size, uint32_t flags)
  82 {
  83    struct drm_i915_gem_mmap gem_mmap = {
  84       .handle = gem_handle,
  85       .offset = offset,
  86       .size = size,
  87       .flags = flags,
  88    };
  89
  90    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_mmap);
  91    if (ret != 0)
  92       return MAP_FAILED;
  93
  94    VG(VALGRIND_MALLOCLIKE_BLOCK(gem_mmap.addr_ptr, gem_mmap.size, 0, 1));
  95    return (void *)(uintptr_t) gem_mmap.addr_ptr;
  96 }
  97
  98 /* This is just a wrapper around munmap, but it also notifies valgrind that
  99  * this map is no longer valid.  Pair this with anv_gem_mmap().
 100  */
 101 void
 102 anv_gem_munmap(void *p, uint64_t size)
 103 {
 104    VG(VALGRIND_FREELIKE_BLOCK(p, 0));
 105    munmap(p, size);
 106 }
 107
 108 uint32_t
 109 anv_gem_userptr(struct anv_device *device, void *mem, size_t size)
 110 {
 111    struct drm_i915_gem_userptr userptr = {
 112       .user_ptr = (__u64)((unsigned long) mem),
 113       .user_size = size,
 114       .flags = 0,
 115    };
 116
 117    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr);
 118    if (ret == -1)
 119       return 0;
 120
 121    return userptr.handle;
 122 }
 123
 124 int
 125 anv_gem_set_caching(struct anv_device *device,
 126                     uint32_t gem_handle, uint32_t caching)
 127 {
 128    struct drm_i915_gem_caching gem_caching = {
 129       .handle = gem_handle,
 130       .caching = caching,
 131    };
 132
 133    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_CACHING, &gem_caching);
 134 }
 135
 136 int
 137 anv_gem_set_domain(struct anv_device *device, uint32_t gem_handle,
 138                    uint32_t read_domains, uint32_t write_domain)
 139 {
 140    struct drm_i915_gem_set_domain gem_set_domain = {
 141       .handle = gem_handle,
 142       .read_domains = read_domains,
 143       .write_domain = write_domain,
 144    };
 145
 146    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &gem_set_domain);
 147 }
 148
 149 /**
 150  * On error, \a timeout_ns holds the remaining time.
 151  */
 152 int
 153 anv_gem_wait(struct anv_device *device, uint32_t gem_handle, int64_t *timeout_ns)
 154 {
 155    struct drm_i915_gem_wait wait = {
 156       .bo_handle = gem_handle,
 157       .timeout_ns = *timeout_ns,
 158       .flags = 0,
 159    };
 160
 161    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
 162    *timeout_ns = wait.timeout_ns;
 163
 164    return ret;
 165 }
 166
 167 int
 168 anv_gem_execbuffer(struct anv_device *device,
 169                    struct drm_i915_gem_execbuffer2 *execbuf)
 170 {
 171    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf);
 172 }
 173
 174 int
 175 anv_gem_set_tiling(struct anv_device *device,
 176                    uint32_t gem_handle, uint32_t stride, uint32_t tiling)
 177 {
 178    int ret;
 179
 180    /* set_tiling overwrites the input on the error path, so we have to open
 181     * code anv_ioctl.
 182     */
 183    do {
 184       struct drm_i915_gem_set_tiling set_tiling = {
 185          .handle = gem_handle,
 186          .tiling_mode = tiling,
 187          .stride = stride,
 188       };
 189
 190       ret = ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 191    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 192
 193    return ret;
 194 }
 195
 196 int
 197 anv_gem_get_param(int fd, uint32_t param)
 198 {
 199    int tmp;
 200
 201    drm_i915_getparam_t gp = {
 202       .param = param,
 203       .value = &tmp,
 204    };
 205
 206    int ret = anv_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
 207    if (ret == 0)
 208       return tmp;
 209
 210    return 0;
 211 }
 212
 213 bool
 214 anv_gem_get_bit6_swizzle(int fd, uint32_t tiling)
 215 {
 216    struct drm_gem_close close;
 217    int ret;
 218
 219    struct drm_i915_gem_create gem_create = {
 220       .size = 4096,
 221    };
 222
 223    if (anv_ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create)) {
 224       assert(!"Failed to create GEM BO");
 225       return false;
 226    }
 227
 228    bool swizzled = false;
 229
 230    /* set_tiling overwrites the input on the error path, so we have to open
 231     * code anv_ioctl.
 232     */
 233    do {
 234       struct drm_i915_gem_set_tiling set_tiling = {
 235          .handle = gem_create.handle,
 236          .tiling_mode = tiling,
 237          .stride = tiling == I915_TILING_X ? 512 : 128,
 238       };
 239
 240       ret = ioctl(fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 241    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 242
 243    if (ret != 0) {
 244       assert(!"Failed to set BO tiling");
 245       goto close_and_return;
 246    }
 247
 248    struct drm_i915_gem_get_tiling get_tiling = {
 249       .handle = gem_create.handle,
 250    };
 251
 252    if (anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling)) {
 253       assert(!"Failed to get BO tiling");
 254       goto close_and_return;
 255    }
 256
 257    swizzled = get_tiling.swizzle_mode != I915_BIT_6_SWIZZLE_NONE;
 258
 259 close_and_return:
 260
 261    memset(&close, 0, sizeof(close));
 262    close.handle = gem_create.handle;
 263    anv_ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close);
 264
 265    return swizzled;
 266 }
 267
 268 int
 269 anv_gem_create_context(struct anv_device *device)
 270 {
 271    struct drm_i915_gem_context_create create = { 0 };
 272
 273    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
 274    if (ret == -1)
 275       return -1;
 276
 277    return create.ctx_id;
 278 }
 279
 280 int
 281 anv_gem_destroy_context(struct anv_device *device, int context)
 282 {
 283    struct drm_i915_gem_context_destroy destroy = {
 284       .ctx_id = context,
 285    };
 286
 287    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &destroy);
 288 }
 289
 290 int
 291 anv_gem_get_aperture(int fd, uint64_t *size)
 292 {
 293    struct drm_i915_gem_get_aperture aperture = { 0 };
 294
 295    int ret = anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
 296    if (ret == -1)
 297       return -1;
 298
 299    *size = aperture.aper_available_size;
 300
 301    return 0;
 302 }
 303
 304 int
 305 anv_gem_handle_to_fd(struct anv_device *device, uint32_t gem_handle)
 306 {
 307    struct drm_prime_handle args = {
 308       .handle = gem_handle,
 309       .flags = DRM_CLOEXEC,
 310    };
 311
 312    int ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 313    if (ret == -1)
 314       return -1;
 315
 316    return args.fd;
 317 }
 318
 319 uint32_t
 320 anv_gem_fd_to_handle(struct anv_device *device, int fd)
 321 {
 322    struct drm_prime_handle args = {
 323       .fd = fd,
 324    };
 325
 326    int ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
 327    if (ret == -1)
 328       return 0;
 329
 330    return args.handle;
 331 }