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 #include "util/vma.h" 29 30 #include <xf86drm.h> 31 32 #ifdef __linux__ 33 #define DRM_MAJOR 226 34 #endif 35 36 typedef int (*ioctl_fn_t)(int fd, unsigned long request, void *arg); 37 38 struct shim_bo; 39 40 struct shim_device { 41 /* Mapping from int fd to struct shim_fd *. */ 42 struct hash_table *fd_map; 43 44 /* Mapping from mmap offset to shim_bo */ 45 struct hash_table_u64 *offset_map; 46 47 mtx_t mem_lock; 48 /* Heap from which shim_bo are allocated */ 49 struct util_vma_heap mem_heap; 50 51 int mem_fd; 52 53 int (**driver_ioctls)(int fd, unsigned long request, void *arg); 54 int driver_ioctl_count; 55 56 void (*driver_bo_free)(struct shim_bo *bo); 57 58 /* Returned by drmGetVersion(). */ 59 const char *driver_name; 60 61 /* Returned by drmGetBusid(). */ 62 const char *unique; 63 64 int version_major, version_minor, version_patchlevel; 65 int bus_type; 66 }; 67 68 extern struct shim_device shim_device; 69 70 struct shim_fd { 71 int fd; 72 int refcount; 73 mtx_t handle_lock; 74 /* mapping from int gem handle to struct shim_bo *. */ 75 struct hash_table *handles; 76 }; 77 78 struct shim_bo { 79 uint64_t mem_addr; 80 void *map; 81 int refcount; 82 uint32_t size; 83 }; 84 85 /* Core support. */ 86 extern int render_node_minor; 87 void drm_shim_device_init(void); 88 void drm_shim_override_file(const char *contents, 89 const char *path_format, ...) PRINTFLIKE(2, 3); 90 void drm_shim_fd_register(int fd, struct shim_fd *shim_fd); 91 void drm_shim_fd_unregister(int fd); 92 struct shim_fd *drm_shim_fd_lookup(int fd); 93 int drm_shim_ioctl(int fd, unsigned long request, void *arg); 94 void *drm_shim_mmap(struct shim_fd *shim_fd, size_t length, int prot, int flags, 95 int fd, off64_t offset); 96 97 int drm_shim_bo_init(struct shim_bo *bo, size_t size); 98 void drm_shim_bo_get(struct shim_bo *bo); 99 void drm_shim_bo_put(struct shim_bo *bo); 100 struct shim_bo *drm_shim_bo_lookup(struct shim_fd *shim_fd, int handle); 101 int drm_shim_bo_get_handle(struct shim_fd *shim_fd, struct shim_bo *bo); 102 uint64_t drm_shim_bo_get_mmap_offset(struct shim_fd *shim_fd, 103 struct shim_bo *bo); 104 105 /* driver-specific hooks. */ 106 void drm_shim_driver_init(void); 107 extern bool drm_shim_driver_prefers_new_render_node; 108