src/drm-shim/drm_shim.h

   1 /*
   2  * Copyright © 2018 Broadcom
   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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <c11/threads.h>
  25
  26 #include "util/macros.h"
  27 #include "util/hash_table.h"
  28
  29 #include <xf86drm.h>
  30
  31 #ifdef __linux__
  32 #define DRM_MAJOR 226
  33 #endif
  34
  35 typedef int (*ioctl_fn_t)(int fd, unsigned long request, void *arg);
  36
  37 struct shim_bo;
  38
  39 struct shim_device {
  40    /* Mapping from int fd to struct shim_fd *. */
  41    struct hash_table *fd_map;
  42
  43    int (**driver_ioctls)(int fd, unsigned long request, void *arg);
  44    int driver_ioctl_count;
  45
  46    void (*driver_bo_free)(struct shim_bo *bo);
  47
  48    /* Returned by drmGetVersion(). */
  49    const char *driver_name;
  50    int version_major, version_minor, version_patchlevel;
  51    int bus_type;
  52 };
  53
  54 extern struct shim_device shim_device;
  55
  56 struct shim_fd {
  57    int fd;
  58    mtx_t handle_lock;
  59    /* mapping from int gem handle to struct shim_bo *. */
  60    struct hash_table *handles;
  61 };
  62
  63 struct shim_bo {
  64    int fd;
  65    void *map;
  66    int refcount;
  67    uint32_t size;
  68 };
  69
  70 /* Core support. */
  71 extern int render_node_minor;
  72 void drm_shim_device_init(void);
  73 void drm_shim_override_file(const char *contents,
  74                             const char *path_format, ...) PRINTFLIKE(2, 3);
  75 void drm_shim_fd_register(int fd, struct shim_fd *shim_fd);
  76 struct shim_fd *drm_shim_fd_lookup(int fd);
  77 int drm_shim_ioctl(int fd, unsigned long request, void *arg);
  78 void *drm_shim_mmap(struct shim_fd *shim_fd, size_t length, int prot, int flags,
  79                     int fd, off_t offset);
  80
  81 void drm_shim_bo_init(struct shim_bo *bo, size_t size);
  82 void drm_shim_bo_get(struct shim_bo *bo);
  83 void drm_shim_bo_put(struct shim_bo *bo);
  84 struct shim_bo *drm_shim_bo_lookup(struct shim_fd *shim_fd, int handle);
  85 int drm_shim_bo_get_handle(struct shim_fd *shim_fd, struct shim_bo *bo);
  86 uint64_t drm_shim_bo_get_mmap_offset(struct shim_fd *shim_fd,
  87                                      struct shim_bo *bo);
  88
  89 /* driver-specific hooks. */
  90 void drm_shim_driver_init(void);
  91 extern bool drm_shim_driver_prefers_new_render_node;