dri.c

   1 /*
   2  * Copyright 2017 Advanced Micro Devices. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifdef DRV_AMDGPU
   8
   9 #include <assert.h>
  10 #include <dlfcn.h>
  11 #include <errno.h>
  12 #include <fcntl.h>
  13 #include <stdbool.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <sys/mman.h>
  17 #include <unistd.h>
  18 #include <xf86drm.h>
  19
  20 #include "dri.h"
  21 #include "drv_priv.h"
  22 #include "helpers.h"
  23 #include "util.h"
  24
  25 static const struct {
  26         uint32_t drm_format;
  27         int dri_image_format;
  28 } drm_to_dri_image_formats[] = {
  29         { DRM_FORMAT_R8, __DRI_IMAGE_FORMAT_R8 },
  30         { DRM_FORMAT_GR88, __DRI_IMAGE_FORMAT_GR88 },
  31         { DRM_FORMAT_RGB565, __DRI_IMAGE_FORMAT_RGB565 },
  32         { DRM_FORMAT_XRGB8888, __DRI_IMAGE_FORMAT_XRGB8888 },
  33         { DRM_FORMAT_ARGB8888, __DRI_IMAGE_FORMAT_ARGB8888 },
  34         { DRM_FORMAT_XBGR8888, __DRI_IMAGE_FORMAT_XBGR8888 },
  35         { DRM_FORMAT_ABGR8888, __DRI_IMAGE_FORMAT_ABGR8888 },
  36         { DRM_FORMAT_XRGB2101010, __DRI_IMAGE_FORMAT_XRGB2101010 },
  37         { DRM_FORMAT_ARGB2101010, __DRI_IMAGE_FORMAT_ARGB2101010 },
  38 };
  39
  40 static int drm_format_to_dri_format(uint32_t drm_format)
  41 {
  42         uint32_t i;
  43         for (i = 0; i < ARRAY_SIZE(drm_to_dri_image_formats); i++) {
  44                 if (drm_to_dri_image_formats[i].drm_format == drm_format)
  45                         return drm_to_dri_image_formats[i].dri_image_format;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static bool lookup_extension(const __DRIextension *const *extensions, const char *name,
  52                              int min_version, const __DRIextension **dst)
  53 {
  54         while (*extensions) {
  55                 if ((*extensions)->name && !strcmp((*extensions)->name, name) &&
  56                     (*extensions)->version >= min_version) {
  57                         *dst = *extensions;
  58                         return true;
  59                 }
  60
  61                 extensions++;
  62         }
  63
  64         return false;
  65 }
  66
  67 /*
  68  * The DRI GEM namespace may be different from the minigbm's driver GEM namespace. We have
  69  * to import into minigbm.
  70  */
  71 static int import_into_minigbm(struct dri_driver *dri, struct bo *bo)
  72 {
  73         uint32_t handle;
  74         int prime_fd, ret;
  75
  76         if (!dri->image_extension->queryImage(bo->priv, __DRI_IMAGE_ATTRIB_FD, &prime_fd))
  77                 return -errno;
  78
  79         ret = drmPrimeFDToHandle(bo->drv->fd, prime_fd, &handle);
  80         if (ret) {
  81                 drv_log("drmPrimeFDToHandle failed with %s\n", strerror(errno));
  82                 return ret;
  83         }
  84
  85         bo->handles[0].u32 = handle;
  86         close(prime_fd);
  87         return 0;
  88 }
  89
  90 /*
  91  * Close Gem Handle
  92  */
  93 static void close_gem_handle(uint32_t handle, int fd)
  94 {
  95         struct drm_gem_close gem_close;
  96         int ret = 0;
  97
  98         memset(&gem_close, 0, sizeof(gem_close));
  99         gem_close.handle = handle;
 100         ret = drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
 101         if (ret)
 102                 drv_log("DRM_IOCTL_GEM_CLOSE failed (handle=%x) error %d\n", handle, ret);
 103 }
 104
 105 /*
 106  * The caller is responsible for setting drv->priv to a structure that derives from dri_driver.
 107  */
 108 int dri_init(struct driver *drv, const char *dri_so_path, const char *driver_suffix)
 109 {
 110         char fname[128];
 111         const __DRIextension **(*get_extensions)();
 112         const __DRIextension *loader_extensions[] = { NULL };
 113
 114         struct dri_driver *dri = drv->priv;
 115
 116         dri->fd = open(drmGetRenderDeviceNameFromFd(drv_get_fd(drv)), O_RDWR);
 117         if (dri->fd < 0)
 118                 return -ENODEV;
 119
 120         dri->driver_handle = dlopen(dri_so_path, RTLD_NOW | RTLD_GLOBAL);
 121         if (!dri->driver_handle)
 122                 goto close_dri_fd;
 123
 124         snprintf(fname, sizeof(fname), __DRI_DRIVER_GET_EXTENSIONS "_%s", driver_suffix);
 125         get_extensions = dlsym(dri->driver_handle, fname);
 126         if (!get_extensions)
 127                 goto free_handle;
 128
 129         dri->extensions = get_extensions();
 130         if (!dri->extensions)
 131                 goto free_handle;
 132
 133         if (!lookup_extension(dri->extensions, __DRI_CORE, 2,
 134                               (const __DRIextension **)&dri->core_extension))
 135                 goto free_handle;
 136
 137         /* Version 4 for createNewScreen2 */
 138         if (!lookup_extension(dri->extensions, __DRI_DRI2, 4,
 139                               (const __DRIextension **)&dri->dri2_extension))
 140                 goto free_handle;
 141
 142         dri->device = dri->dri2_extension->createNewScreen2(0, dri->fd, loader_extensions,
 143                                                             dri->extensions, &dri->configs, NULL);
 144         if (!dri->device)
 145                 goto free_handle;
 146
 147         dri->context =
 148             dri->dri2_extension->createNewContext(dri->device, *dri->configs, NULL, NULL);
 149
 150         if (!dri->context)
 151                 goto free_screen;
 152
 153         if (!lookup_extension(dri->core_extension->getExtensions(dri->device), __DRI_IMAGE, 12,
 154                               (const __DRIextension **)&dri->image_extension))
 155                 goto free_context;
 156
 157         if (!lookup_extension(dri->core_extension->getExtensions(dri->device), __DRI2_FLUSH, 4,
 158                               (const __DRIextension **)&dri->flush_extension))
 159                 goto free_context;
 160
 161         return 0;
 162
 163 free_context:
 164         dri->core_extension->destroyContext(dri->context);
 165 free_screen:
 166         dri->core_extension->destroyScreen(dri->device);
 167 free_handle:
 168         dlclose(dri->driver_handle);
 169         dri->driver_handle = NULL;
 170 close_dri_fd:
 171         close(dri->fd);
 172         return -ENODEV;
 173 }
 174
 175 /*
 176  * The caller is responsible for freeing drv->priv.
 177  */
 178 void dri_close(struct driver *drv)
 179 {
 180         struct dri_driver *dri = drv->priv;
 181
 182         dri->core_extension->destroyContext(dri->context);
 183         dri->core_extension->destroyScreen(dri->device);
 184         dlclose(dri->driver_handle);
 185         dri->driver_handle = NULL;
 186         close(dri->fd);
 187 }
 188
 189 int dri_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 190                   uint64_t use_flags)
 191 {
 192         unsigned int dri_use;
 193         int ret, dri_format, stride, offset;
 194         struct dri_driver *dri = bo->drv->priv;
 195
 196         assert(bo->meta.num_planes == 1);
 197         dri_format = drm_format_to_dri_format(format);
 198
 199         /* Gallium drivers require shared to get the handle and stride. */
 200         dri_use = __DRI_IMAGE_USE_SHARE;
 201         if (use_flags & BO_USE_SCANOUT)
 202                 dri_use |= __DRI_IMAGE_USE_SCANOUT;
 203         if (use_flags & BO_USE_CURSOR)
 204                 dri_use |= __DRI_IMAGE_USE_CURSOR;
 205         if (use_flags & BO_USE_LINEAR)
 206                 dri_use |= __DRI_IMAGE_USE_LINEAR;
 207
 208         bo->priv = dri->image_extension->createImage(dri->device, width, height, dri_format,
 209                                                      dri_use, NULL);
 210         if (!bo->priv) {
 211                 ret = -errno;
 212                 return ret;
 213         }
 214
 215         ret = import_into_minigbm(dri, bo);
 216         if (ret)
 217                 goto free_image;
 218
 219         if (!dri->image_extension->queryImage(bo->priv, __DRI_IMAGE_ATTRIB_STRIDE, &stride)) {
 220                 ret = -errno;
 221                 goto close_handle;
 222         }
 223
 224         if (!dri->image_extension->queryImage(bo->priv, __DRI_IMAGE_ATTRIB_OFFSET, &offset)) {
 225                 ret = -errno;
 226                 goto close_handle;
 227         }
 228
 229         bo->meta.strides[0] = stride;
 230         bo->meta.sizes[0] = stride * height;
 231         bo->meta.offsets[0] = offset;
 232         bo->meta.total_size = offset + bo->meta.sizes[0];
 233         return 0;
 234
 235 close_handle:
 236         close_gem_handle(bo->handles[0].u32, bo->drv->fd);
 237 free_image:
 238         dri->image_extension->destroyImage(bo->priv);
 239         return ret;
 240 }
 241
 242 int dri_bo_import(struct bo *bo, struct drv_import_fd_data *data)
 243 {
 244         int ret;
 245         struct dri_driver *dri = bo->drv->priv;
 246
 247         assert(bo->meta.num_planes == 1);
 248
 249         // clang-format off
 250         bo->priv = dri->image_extension->createImageFromFds(dri->device, data->width, data->height,
 251                                                             data->format, data->fds,
 252                                                             bo->meta.num_planes,
 253                                                             (int *)data->strides,
 254                                                             (int *)data->offsets, NULL);
 255         // clang-format on
 256         if (!bo->priv)
 257                 return -errno;
 258
 259         ret = import_into_minigbm(dri, bo);
 260         if (ret) {
 261                 dri->image_extension->destroyImage(bo->priv);
 262                 return ret;
 263         }
 264
 265         return 0;
 266 }
 267
 268 int dri_bo_destroy(struct bo *bo)
 269 {
 270         struct dri_driver *dri = bo->drv->priv;
 271
 272         assert(bo->priv);
 273         close_gem_handle(bo->handles[0].u32, bo->drv->fd);
 274         dri->image_extension->destroyImage(bo->priv);
 275         bo->priv = NULL;
 276         return 0;
 277 }
 278
 279 /*
 280  * Map an image plane.
 281  *
 282  * This relies on the underlying driver to do a decompressing and/or de-tiling
 283  * blit if necessary,
 284  *
 285  * This function itself is not thread-safe; we rely on the fact that the caller
 286  * locks a per-driver mutex.
 287  */
 288 void *dri_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
 289 {
 290         struct dri_driver *dri = bo->drv->priv;
 291
 292         /* GBM flags and DRI flags are the same. */
 293         vma->addr = dri->image_extension->mapImage(dri->context, bo->priv, 0, 0, bo->meta.width,
 294                                                    bo->meta.height, map_flags,
 295                                                    (int *)&vma->map_strides[plane], &vma->priv);
 296         if (!vma->addr)
 297                 return MAP_FAILED;
 298
 299         return vma->addr;
 300 }
 301
 302 int dri_bo_unmap(struct bo *bo, struct vma *vma)
 303 {
 304         struct dri_driver *dri = bo->drv->priv;
 305
 306         assert(vma->priv);
 307         dri->image_extension->unmapImage(dri->context, bo->priv, vma->priv);
 308
 309         /*
 310          * From gbm_dri.c in Mesa:
 311          *
 312          * "Not all DRI drivers use direct maps. They may queue up DMA operations
 313          *  on the mapping context. Since there is no explicit gbm flush mechanism,
 314          *  we need to flush here."
 315          */
 316
 317         dri->flush_extension->flush_with_flags(dri->context, NULL, __DRI2_FLUSH_CONTEXT, 0);
 318         return 0;
 319 }
 320
 321 #endif