tests/radeon/rbo.c

   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 }