vc4_bufmgr.c revision 848b8605 
1/*
2 * Copyright © 2014 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 DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24#include <errno.h>
25#include <err.h>
26#include <stdio.h>
27#include <sys/mman.h>
28#include <xf86drm.h>
29#include <xf86drmMode.h>
30
31#include "util/u_memory.h"
32
33#include "vc4_context.h"
34#include "vc4_screen.h"
35
36struct vc4_bo *
37vc4_bo_alloc(struct vc4_screen *screen, uint32_t size, const char *name)
38{
39        struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
40        if (!bo)
41                return NULL;
42
43        pipe_reference_init(&bo->reference, 1);
44        bo->screen = screen;
45        bo->size = size;
46        bo->name = name;
47
48        struct drm_mode_create_dumb create;
49        memset(&create, 0, sizeof(create));
50
51        create.width = 128;
52        create.bpp = 8;
53        create.height = (size + 127) / 128;
54
55        int ret = drmIoctl(screen->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
56        if (ret != 0)
57                errx(1, "create ioctl");
58
59        bo->handle = create.handle;
60        assert(create.size >= size);
61
62        return bo;
63}
64
65void
66vc4_bo_free(struct vc4_bo *bo)
67{
68        struct vc4_screen *screen = bo->screen;
69
70        if (bo->map) {
71#ifdef USE_VC4_SIMULATOR
72                if (bo->simulator_winsys_map) {
73                        free(bo->map);
74                        bo->map = bo->simulator_winsys_map;
75                }
76#endif
77                munmap(bo->map, bo->size);
78        }
79
80        struct drm_gem_close c;
81        c.handle = bo->handle;
82        int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
83        if (ret != 0)
84                fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
85
86        free(bo);
87}
88
89struct vc4_bo *
90vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
91                 uint32_t winsys_stride)
92{
93        struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
94
95        struct drm_gem_open o;
96        o.name = name;
97        int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
98        if (ret) {
99                fprintf(stderr, "Failed to open bo %d: %s\n",
100                        name, strerror(errno));
101                free(bo);
102                return NULL;
103        }
104
105        pipe_reference_init(&bo->reference, 1);
106        bo->screen = screen;
107        bo->handle = o.handle;
108        bo->size = o.size;
109        bo->name = "winsys";
110
111#ifdef USE_VC4_SIMULATOR
112        vc4_bo_map(bo);
113        bo->simulator_winsys_map = bo->map;
114        bo->simulator_winsys_stride = winsys_stride;
115        bo->map = malloc(bo->size);
116#endif
117
118        return bo;
119}
120
121struct vc4_bo *
122vc4_bo_alloc_mem(struct vc4_screen *screen, const void *data, uint32_t size,
123                 const char *name)
124{
125        void *map;
126        struct vc4_bo *bo;
127
128        bo = vc4_bo_alloc(screen, size, name);
129        map = vc4_bo_map(bo);
130        memcpy(map, data, size);
131        return bo;
132}
133
134bool
135vc4_bo_flink(struct vc4_bo *bo, uint32_t *name)
136{
137        struct drm_gem_flink flink = {
138                .handle = bo->handle,
139        };
140        int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
141        if (ret) {
142                fprintf(stderr, "Failed to flink bo %d: %s\n",
143                        bo->handle, strerror(errno));
144                free(bo);
145                return false;
146        }
147
148        *name = flink.name;
149
150        return true;
151}
152
153void *
154vc4_bo_map(struct vc4_bo *bo)
155{
156        int ret;
157
158        if (bo->map)
159                return bo->map;
160
161        struct drm_mode_map_dumb map;
162        memset(&map, 0, sizeof(map));
163        map.handle = bo->handle;
164        ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
165        if (ret != 0)
166                errx(1, "map ioctl");
167
168        bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
169                       bo->screen->fd, map.offset);
170        if (bo->map == MAP_FAILED) {
171                errx(1, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
172                     bo->handle, (long long)map.offset, bo->size);
173        }
174
175        return bo->map;
176}
177