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