src/vulkan/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 "private.h"
  34
  35 #ifdef HAVE_VALGRIND
  36 #include <valgrind.h>
  37 #include <memcheck.h>
  38 #define VG(x) x
  39 #else
  40 #define VG(x)
  41 #endif
  42
  43 #define VG_CLEAR(s) VG(memset(&s, 0, sizeof(s)))
  44
  45 static int
  46 anv_ioctl(int fd, unsigned long request, void *arg)
  47 {
  48    int ret;
  49
  50    do {
  51       ret = ioctl(fd, request, arg);
  52    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
  53
  54    return ret;
  55 }
  56
  57 /**
  58  * Wrapper around DRM_IOCTL_I915_GEM_CREATE.
  59  *
  60  * Return gem handle, or 0 on failure. Gem handles are never 0.
  61  */
  62 uint32_t
  63 anv_gem_create(struct anv_device *device, size_t size)
  64 {
  65    struct drm_i915_gem_create gem_create;
  66    int ret;
  67
  68    VG_CLEAR(gem_create);
  69    gem_create.size = size;
  70
  71    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
  72    if (ret != 0) {
  73       /* FIXME: What do we do if this fails? */
  74       return 0;
  75    }
  76
  77    return gem_create.handle;
  78 }
  79
  80 void
  81 anv_gem_close(struct anv_device *device, int gem_handle)
  82 {
  83    struct drm_gem_close close;
  84
  85    VG_CLEAR(close);
  86    close.handle = gem_handle;
  87    anv_ioctl(device->fd, DRM_IOCTL_GEM_CLOSE, &close);
  88 }
  89
  90 /**
  91  * Wrapper around DRM_IOCTL_I915_GEM_MMAP.
  92  */
  93 void*
  94 anv_gem_mmap(struct anv_device *device, uint32_t gem_handle,
  95              uint64_t offset, uint64_t size)
  96 {
  97    struct drm_i915_gem_mmap gem_mmap;
  98    int ret;
  99
 100    gem_mmap.handle = gem_handle;
 101    VG_CLEAR(gem_mmap.pad);
 102    gem_mmap.offset = offset;
 103    gem_mmap.size = size;
 104    VG_CLEAR(gem_mmap.addr_ptr);
 105
 106 #ifdef I915_MMAP_WC
 107    gem_mmap.flags = 0;
 108 #endif
 109
 110    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_MMAP, &gem_mmap);
 111    if (ret != 0) {
 112       /* FIXME: Is NULL the right error return? Cf MAP_INVALID */
 113       return NULL;
 114    }
 115
 116    VG(VALGRIND_MALLOCLIKE_BLOCK(gem_mmap.addr_ptr, gem_mmap.size, 0, 1));
 117    return (void *)(uintptr_t) gem_mmap.addr_ptr;
 118 }
 119
 120 /* This is just a wrapper around munmap, but it also notifies valgrind that
 121  * this map is no longer valid.  Pair this with anv_gem_mmap().
 122  */
 123 void
 124 anv_gem_munmap(void *p, uint64_t size)
 125 {
 126    munmap(p, size);
 127    VG(VALGRIND_FREELIKE_BLOCK(p, 0));
 128 }
 129
 130 int
 131 anv_gem_userptr(struct anv_device *device, void *mem, size_t size)
 132 {
 133    struct drm_i915_gem_userptr userptr;
 134    int ret;
 135
 136    VG_CLEAR(userptr);
 137    userptr.user_ptr = (__u64)((unsigned long) mem);
 138    userptr.user_size = size;
 139    userptr.flags = 0;
 140
 141    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_USERPTR, &userptr);
 142    if (ret == -1)
 143       return 0;
 144
 145    return userptr.handle;
 146 }
 147
 148 /**
 149  * On error, \a timeout_ns holds the remaining time.
 150  */
 151 int
 152 anv_gem_wait(struct anv_device *device, int gem_handle, int64_t *timeout_ns)
 153 {
 154    struct drm_i915_gem_wait wait;
 155    int ret;
 156
 157    VG_CLEAR(wait);
 158    wait.bo_handle = gem_handle;
 159    wait.timeout_ns = *timeout_ns;
 160    wait.flags = 0;
 161
 162    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
 163    *timeout_ns = wait.timeout_ns;
 164
 165    return ret;
 166 }
 167
 168 int
 169 anv_gem_execbuffer(struct anv_device *device,
 170                    struct drm_i915_gem_execbuffer2 *execbuf)
 171 {
 172    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, execbuf);
 173 }
 174
 175 int
 176 anv_gem_set_tiling(struct anv_device *device,
 177                    int gem_handle, uint32_t stride, uint32_t tiling)
 178 {
 179    struct drm_i915_gem_set_tiling set_tiling;
 180    int ret;
 181
 182    /* set_tiling overwrites the input on the error path, so we have to open
 183     * code anv_ioctl.
 184     */
 185
 186    do {
 187       VG_CLEAR(set_tiling);
 188       set_tiling.handle = gem_handle;
 189       set_tiling.tiling_mode = I915_TILING_X;
 190       set_tiling.stride = stride;
 191
 192       ret = ioctl(device->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
 193    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
 194
 195    return ret;
 196 }
 197
 198 int
 199 anv_gem_get_param(int fd, uint32_t param)
 200 {
 201    drm_i915_getparam_t gp;
 202    int ret, tmp;
 203
 204    VG_CLEAR(gp);
 205    gp.param = param;
 206    gp.value = &tmp;
 207    ret = anv_ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
 208    if (ret == 0)
 209       return tmp;
 210
 211    return 0;
 212 }
 213
 214 int
 215 anv_gem_create_context(struct anv_device *device)
 216 {
 217    struct drm_i915_gem_context_create create;
 218    int ret;
 219
 220    VG_CLEAR(create);
 221
 222    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
 223    if (ret == -1)
 224       return -1;
 225
 226    return create.ctx_id;
 227 }
 228
 229 int
 230 anv_gem_destroy_context(struct anv_device *device, int context)
 231 {
 232    struct drm_i915_gem_context_destroy destroy;
 233
 234    VG_CLEAR(destroy);
 235    destroy.ctx_id = context;
 236
 237    return anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &destroy);
 238 }
 239
 240 int
 241 anv_gem_get_aperture(struct anv_device *device, uint64_t *size)
 242 {
 243    struct drm_i915_gem_get_aperture aperture;
 244    int ret;
 245
 246    VG_CLEAR(aperture);
 247    ret = anv_ioctl(device->fd, DRM_IOCTL_I915_GEM_GET_APERTURE, &aperture);
 248    if (ret == -1)
 249       return -1;
 250
 251    *size = aperture.aper_available_size;
 252
 253    return 0;
 254 }
 255
 256 int
 257 anv_gem_handle_to_fd(struct anv_device *device, int gem_handle)
 258 {
 259    struct drm_prime_handle args;
 260    int ret;
 261
 262    VG_CLEAR(args);
 263    args.handle = gem_handle;
 264    args.flags = DRM_CLOEXEC;
 265
 266    ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &args);
 267    if (ret == -1)
 268       return -1;
 269
 270    return args.fd;
 271 }
 272
 273 int
 274 anv_gem_fd_to_handle(struct anv_device *device, int fd)
 275 {
 276    struct drm_prime_handle args;
 277    int ret;
 278
 279    VG_CLEAR(args);
 280    args.fd = fd;
 281
 282    ret = anv_ioctl(device->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &args);
 283    if (ret == -1)
 284       return 0;
 285
 286    return args.handle;
 287 }