1 /*
2 * Copyright © 2011 Red Hat
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 * Authors:
24 * Jerome Glisse <j.glisse@gmail.com>
25 */
26 #define _FILE_OFFSET_BITS 64
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/mman.h>
31 #include <errno.h>
32 #include "xf86drm.h"
33 #include "radeon_drm.h"
34 #include "rbo.h"
35
rbo(int fd,unsigned handle,unsigned size,unsigned alignment,void * ptr)36 struct rbo *rbo(int fd, unsigned handle, unsigned size,
37 unsigned alignment, void *ptr)
38 {
39 struct rbo *bo;
40 int r;
41
42 bo = calloc(1, sizeof(*bo));
43 if (bo == NULL) {
44 return NULL;
45 }
46 list_inithead(&bo->list);
47 bo->fd = fd;
48 bo->size = size;
49 bo->handle = handle;
50 bo->refcount = 1;
51 bo->alignment = alignment;
52
53 if (handle) {
54 struct drm_gem_open open_arg;
55
56 memset(&open_arg, 0, sizeof(open_arg));
57 open_arg.name = handle;
58 r = drmIoctl(fd, DRM_IOCTL_GEM_OPEN, &open_arg);
59 if (r != 0) {
60 free(bo);
61 return NULL;
62 }
63 bo->handle = open_arg.handle;
64 } else {
65 struct drm_radeon_gem_create args;
66
67 args.size = size;
68 args.alignment = alignment;
69 args.initial_domain = RADEON_GEM_DOMAIN_CPU;
70 args.flags = 0;
71 args.handle = 0;
72 r = drmCommandWriteRead(fd, DRM_RADEON_GEM_CREATE,
73 &args, sizeof(args));
74 bo->handle = args.handle;
75 if (r) {
76 fprintf(stderr, "Failed to allocate :\n");
77 fprintf(stderr, " size : %d bytes\n", size);
78 fprintf(stderr, " alignment : %d bytes\n", alignment);
79 free(bo);
80 return NULL;
81 }
82 }
83 if (ptr) {
84 if (rbo_map(bo)) {
85 fprintf(stderr, "%s failed to copy data into bo\n", __func__);
86 return rbo_decref(bo);
87 }
88 memcpy(bo->data, ptr, size);
89 rbo_unmap(bo);
90 }
91 return bo;
92 }
93
rbo_map(struct rbo * bo)94 int rbo_map(struct rbo *bo)
95 {
96 struct drm_radeon_gem_mmap args;
97 void *ptr;
98 int r;
99
100 if (bo->mapcount++ != 0) {
101 return 0;
102 }
103 /* Zero out args to make valgrind happy */
104 memset(&args, 0, sizeof(args));
105 args.handle = bo->handle;
106 args.offset = 0;
107 args.size = (uint64_t)bo->size;
108 r = drmCommandWriteRead(bo->fd, DRM_RADEON_GEM_MMAP,
109 &args, sizeof(args));
110 if (r) {
111 fprintf(stderr, "error mapping %p 0x%08X (error = %d)\n",
112 bo, bo->handle, r);
113 return r;
114 }
115 ptr = mmap(0, args.size, PROT_READ|PROT_WRITE, MAP_SHARED, bo->fd, args.addr_ptr);
116 if (ptr == MAP_FAILED) {
117 fprintf(stderr, "%s failed to map bo\n", __func__);
118 return -errno;
119 }
120 bo->data = ptr;
121 return 0;
122 }
123
rbo_unmap(struct rbo * bo)124 void rbo_unmap(struct rbo *bo)
125 {
126 if (--bo->mapcount > 0) {
127 return;
128 }
129 munmap(bo->data, bo->size);
130 bo->data = NULL;
131 }
132
rbo_incref(struct rbo * bo)133 struct rbo *rbo_incref(struct rbo *bo)
134 {
135 bo->refcount++;
136 return bo;
137 }
138
rbo_decref(struct rbo * bo)139 struct rbo *rbo_decref(struct rbo *bo)
140 {
141 struct drm_gem_close args;
142
143 if (bo == NULL)
144 return NULL;
145 if (--bo->refcount > 0) {
146 return NULL;
147 }
148
149 munmap(bo->data, bo->size);
150 memset(&args, 0, sizeof(args));
151 args.handle = bo->handle;
152 drmIoctl(bo->fd, DRM_IOCTL_GEM_CLOSE, &args);
153 memset(bo, 0, sizeof(struct rbo));
154 free(bo);
155 return NULL;
156 }
157
rbo_wait(struct rbo * bo)158 int rbo_wait(struct rbo *bo)
159 {
160 struct drm_radeon_gem_wait_idle args;
161 int ret;
162
163 /* Zero out args to make valgrind happy */
164 memset(&args, 0, sizeof(args));
165 args.handle = bo->handle;
166 do {
167 ret = drmCommandWriteRead(bo->fd, DRM_RADEON_GEM_WAIT_IDLE,
168 &args, sizeof(args));
169 } while (ret == -EBUSY);
170 return ret;
171 }
172