Jerome Glisse | ca49712 | 2011-11-10 16:47:10 -0500 | [diff] [blame] | 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 | |
| 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 | |
| 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 | |
| 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 | |
| 133 | struct rbo *rbo_incref(struct rbo *bo) |
| 134 | { |
| 135 | bo->refcount++; |
| 136 | return bo; |
| 137 | } |
| 138 | |
| 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 | |
| 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 | } |