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 #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 static int
  36 anv_ioctl(int fd, unsigned long request, void *arg)
  37 {
  38    int ret;
  39
  40    do {
  41       ret = ioctl(fd, request, arg);
  42    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
  43
  44    return ret;
  45 }
  46
  47 /**
  48  * Wrapper around DRM_IOCTL_I915_GEM_CREATE.
  49  *
  50  * Return gem handle, or 0 on failure. Gem handles are never 0.
  51  */
  52 uint32_t
  53 anv_gem_create(struct anv_device *device, size_t size)
  54 {
  55    struct drm_i915_gem_create gem_create = {
  56       .size = size,
  57    };
  58
  59    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
  60    if (ret != 0) {
  61       /* FIXME: What do we do if this fails? */
  62       return 0;
  63    }
  64
  65    return gem_create.handle;
  66 }
  67
  68 void
  69 anv_gem_close(struct anv_device *device, uint32_t gem_handle)
  70 {
  71    struct drm_gem_close close = {
  72       .handle = gem_handle,
  73    };
  74
  75    anv_ioctl(device->fd, DRM_IOCTL_GEM_CLOSE, &close);
  76 }
  77
  78 /**
  79  * Wrapper around DRM_IOCTL_I915_GEM_MMAP.
  80  */
  81 void*
  82 anv_gem_mmap(struct anv_device *device, uint32_t gem_handle,
  83              uint64_t offset, uint64_t size, uint32_t flags)
  84 {
  85    struct drm_i915_gem_mmap gem_mmap = {
  86       .handle = gem_handle,
  87       .offset = offset,
  88       .size = size,
  89       .flags = flags,
  90    };
  91
  92    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_mmap);
  93    if (ret != 0) {
  94       /* FIXME: Is NULL the right error return? Cf MAP_INVALID */
  95       return NULL;
  96    }
  97
  98    VG(VALGRIND_MALLOCLIKE_BLOCK(gem_mmap.addr_ptr, gem_mmap.size, 0, 1));
  99    return (void *)(uintptr_t) gem_mmap.addr_ptr;
 100 }
 101
 102 /* This is just a wrapper around munmap, but it also notifies valgrind that
 103  * this map is no longer valid.  Pair this with anv_gem_mmap().
 104  */
 105 void
 106 anv_gem_munmap(void *p, uint64_t size)
 107 {
 108    VG(VALGRIND_FREELIKE_BLOCK(p, 0));
 109    munmap(p, size);
 110 }
 111
 112 uint32_t
 113 anv_gem_userptr(struct anv_device *device, void *mem, size_t size)
 114 {
 115    struct drm_i915_gem_userptr userptr = {
 116       .user_ptr = (__u64)((unsigned long) mem),
 117       .user_size = size,
 118       .flags = 0,
 119    };
 120
 121    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr);
 122    if (ret == -1)
 123       return 0;
 124
 125    return userptr.handle;
 126 }
 127
 128 int
 129 anv_gem_set_caching(struct anv_device *device,
 130                     uint32_t gem_handle, uint32_t caching)
 131 {
 132    struct drm_i915_gem_caching gem_caching = {
 133       .handle = gem_handle,
 134       .caching = caching,
 135    };
 136
 137    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_CACHING, &gem_caching);
 138 }
 139
 140 int
 141 anv_gem_set_domain(struct anv_device *device, uint32_t gem_handle,
 142                    uint32_t read_domains, uint32_t write_domain)
 143 {
 144    struct drm_i915_gem_set_domain gem_set_domain = {
 145       .handle = gem_handle,
 146       .read_domains = read_domains,
 147       .write_domain = write_domain,
 148    };
 149
 150    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &gem_set_domain);
 151 }
 152
 153 /**
 154  * On error, \a timeout_ns holds the remaining time.
 155  */
 156 int
 157 anv_gem_wait(struct anv_device *device, uint32_t gem_handle, int64_t *timeout_ns)
 158 {
 159    struct drm_i915_gem_wait wait = {
 160       .bo_handle = gem_handle,
 161       .timeout_ns = *timeout_ns,
 162       .flags = 0,
 163    };
 164
 165    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
 166    *timeout_ns = wait.timeout_ns;
 167
 168    return ret;
 169 }
 170
 171 int
 172 anv_gem_execbuffer(struct anv_device *device,
 173                    struct drm_i915_gem_execbuffer2 *execbuf)
 174 {
 175    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf);
 176 }
 177
 178 int
 179 anv_gem_set_tiling(struct anv_device *device,
 180                    uint32_t gem_handle, uint32_t stride, uint32_t tiling)
 181 {
 182    int ret;
 183
 184    /* set_tiling overwrites the input on the error path, so we have to open
 185     * code anv_ioctl.
 186     */
 187    do {
 188       struct drm_i915_gem_set_tiling set_tiling = {
 189          .handle = gem_handle,
 190          .tiling_mode = tiling,
 191          .stride = stride,
 192       };
 193
 194       ret = ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 195    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 196
 197    return ret;
 198 }
 199
 200 int
 201 anv_gem_get_param(int fd, uint32_t param)
 202 {
 203    int tmp;
 204
 205    drm_i915_getparam_t gp = {
 206       .param = param,
 207       .value = &tmp,
 208    };
 209
 210    int ret = anv_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
 211    if (ret == 0)
 212       return tmp;
 213
 214    return 0;
 215 }
 216
 217 bool
 218 anv_gem_get_bit6_swizzle(int fd, uint32_t tiling)
 219 {
 220    struct drm_gem_close close;
 221    int ret;
 222
 223    struct drm_i915_gem_create gem_create = {
 224       .size = 4096,
 225    };
 226
 227    if (anv_ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create)) {
 228       assert(!"Failed to create GEM BO");
 229       return false;
 230    }
 231
 232    bool swizzled = false;
 233
 234    /* set_tiling overwrites the input on the error path, so we have to open
 235     * code anv_ioctl.
 236     */
 237    do {
 238       struct drm_i915_gem_set_tiling set_tiling = {
 239          .handle = gem_create.handle,
 240          .tiling_mode = tiling,
 241          .stride = tiling == I915_TILING_X ? 512 : 128,
 242       };
 243
 244       ret = ioctl(fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 245    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 246
 247    if (ret != 0) {
 248       assert(!"Failed to set BO tiling");
 249       goto close_and_return;
 250    }
 251
 252    struct drm_i915_gem_get_tiling get_tiling = {
 253       .handle = gem_create.handle,
 254    };
 255
 256    if (anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling)) {
 257       assert(!"Failed to get BO tiling");
 258       goto close_and_return;
 259    }
 260
 261    swizzled = get_tiling.swizzle_mode != I915_BIT_6_SWIZZLE_NONE;
 262
 263 close_and_return:
 264
 265    memset(&close, 0, sizeof(close));
 266    close.handle = gem_create.handle;
 267    anv_ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close);
 268
 269    return swizzled;
 270 }
 271
 272 int
 273 anv_gem_create_context(struct anv_device *device)
 274 {
 275    struct drm_i915_gem_context_create create = { 0 };
 276
 277    int ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
 278    if (ret == -1)
 279       return -1;
 280
 281    return create.ctx_id;
 282 }
 283
 284 int
 285 anv_gem_destroy_context(struct anv_device *device, int context)
 286 {
 287    struct drm_i915_gem_context_destroy destroy = {
 288       .ctx_id = context,
 289    };
 290
 291    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &destroy);
 292 }
 293
 294 int
 295 anv_gem_get_aperture(int fd, uint64_t *size)
 296 {
 297    struct drm_i915_gem_get_aperture aperture = { 0 };
 298
 299    int ret = anv_ioctl(fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
 300    if (ret == -1)
 301       return -1;
 302
 303    *size = aperture.aper_available_size;
 304
 305    return 0;
 306 }
 307
 308 int
 309 anv_gem_handle_to_fd(struct anv_device *device, uint32_t gem_handle)
 310 {
 311    struct drm_prime_handle args = {
 312       .handle = gem_handle,
 313       .flags = DRM_CLOEXEC,
 314    };
 315
 316    int ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 317    if (ret == -1)
 318       return -1;
 319
 320    return args.fd;
 321 }
 322
 323 uint32_t
 324 anv_gem_fd_to_handle(struct anv_device *device, int fd)
 325 {
 326    struct drm_prime_handle args = {
 327       .fd = fd,
 328    };
 329
 330    int ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
 331    if (ret == -1)
 332       return 0;
 333
 334    return args.handle;
 335 }