src/gallium/targets/xorg-vmwgfx/vmw_ioctl.c

   1 /**********************************************************
   2  * Copyright 2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 /**
  27  * @file
  28  * Contains the functions for creating dma buffers by calling
  29  * the kernel via driver specific ioctls.
  30  *
  31  * @author Jakob Bornecrantz <jakob@vmware.com>
  32  */
  33
  34 #ifndef HAVE_STDINT_H
  35 #define HAVE_STDINT_H 1
  36 #endif
  37 #define _FILE_OFFSET_BITS 64
  38
  39 #include <errno.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #include <sys/mman.h>
  44 #include "xf86drm.h"
  45 #include "../../winsys/svga/drm/vmwgfx_drm.h"
  46
  47 #include "vmw_driver.h"
  48 #include "util/u_debug.h"
  49
  50 struct vmw_dma_buffer
  51 {
  52     void *data;
  53     unsigned handle;
  54     uint64_t map_handle;
  55     unsigned map_count;
  56     uint32_t size;
  57 };
  58
  59 static int
  60 vmw_ioctl_get_param(struct vmw_customizer *vmw, uint32_t param, uint64_t *out)
  61 {
  62     struct drm_vmw_getparam_arg gp_arg;
  63     int ret;
  64
  65     memset(&gp_arg, 0, sizeof(gp_arg));
  66     gp_arg.param = param;
  67     ret = drmCommandWriteRead(vmw->fd, DRM_VMW_GET_PARAM,
  68             &gp_arg, sizeof(gp_arg));
  69
  70     if (ret == 0) {
  71         *out = gp_arg.value;
  72     }
  73
  74     return ret;
  75 }
  76
  77 int
  78 vmw_ioctl_supports_streams(struct vmw_customizer *vmw)
  79 {
  80     uint64_t value;
  81     int ret;
  82
  83     ret = vmw_ioctl_get_param(vmw, DRM_VMW_PARAM_NUM_STREAMS, &value);
  84     if (ret)
  85         return ret;
  86
  87     return value ? 0 : -ENOSYS;
  88 }
  89
  90 int
  91 vmw_ioctl_num_streams(struct vmw_customizer *vmw,
  92                       uint32_t *ntot, uint32_t *nfree)
  93 {
  94     uint64_t v1, v2;
  95     int ret;
  96
  97     ret = vmw_ioctl_get_param(vmw, DRM_VMW_PARAM_NUM_STREAMS, &v1);
  98     if (ret)
  99         return ret;
 100
 101     ret = vmw_ioctl_get_param(vmw, DRM_VMW_PARAM_NUM_FREE_STREAMS, &v2);
 102     if (ret)
 103         return ret;
 104
 105     *ntot = (uint32_t)v1;
 106     *nfree = (uint32_t)v2;
 107
 108     return 0;
 109 }
 110
 111 int
 112 vmw_ioctl_claim_stream(struct vmw_customizer *vmw, uint32_t *out)
 113 {
 114     struct drm_vmw_stream_arg s_arg;
 115     int ret;
 116
 117     ret = drmCommandRead(vmw->fd, DRM_VMW_CLAIM_STREAM,
 118                          &s_arg, sizeof(s_arg));
 119
 120     if (ret)
 121         return -1;
 122
 123     *out = s_arg.stream_id;
 124     return 0;
 125 }
 126
 127 int
 128 vmw_ioctl_unref_stream(struct vmw_customizer *vmw, uint32_t stream_id)
 129 {
 130     struct drm_vmw_stream_arg s_arg;
 131     int ret;
 132
 133     memset(&s_arg, 0, sizeof(s_arg));
 134     s_arg.stream_id = stream_id;
 135
 136     ret = drmCommandRead(vmw->fd, DRM_VMW_CLAIM_STREAM,
 137                          &s_arg, sizeof(s_arg));
 138
 139     return 0;
 140 }
 141
 142 int
 143 vmw_ioctl_cursor_bypass(struct vmw_customizer *vmw, int xhot, int yhot)
 144 {
 145     struct drm_vmw_cursor_bypass_arg arg;
 146     int ret;
 147
 148     memset(&arg, 0, sizeof(arg));
 149     arg.flags = DRM_VMW_CURSOR_BYPASS_ALL;
 150     arg.xhot = xhot;
 151     arg.yhot = yhot;
 152
 153     ret = drmCommandWrite(vmw->fd, DRM_VMW_CURSOR_BYPASS,
 154                           &arg, sizeof(arg));
 155
 156     return ret;
 157 }
 158
 159 struct vmw_dma_buffer *
 160 vmw_ioctl_buffer_create(struct vmw_customizer *vmw, uint32_t size, unsigned *handle)
 161 {
 162     struct vmw_dma_buffer *buf;
 163     union drm_vmw_alloc_dmabuf_arg arg;
 164     struct drm_vmw_alloc_dmabuf_req *req = &arg.req;
 165     struct drm_vmw_dmabuf_rep *rep = &arg.rep;
 166     int ret;
 167
 168     buf = xcalloc(1, sizeof(*buf));
 169     if (!buf)
 170         goto err;
 171
 172     memset(&arg, 0, sizeof(arg));
 173     req->size = size;
 174     do {
 175         ret = drmCommandWriteRead(vmw->fd, DRM_VMW_ALLOC_DMABUF, &arg, sizeof(arg));
 176     } while (ret == -ERESTART);
 177
 178     if (ret) {
 179         debug_printf("IOCTL failed %d: %s\n", ret, strerror(-ret));
 180         goto err_free;
 181     }
 182
 183
 184     buf->data = NULL;
 185     buf->handle = rep->handle;
 186     buf->map_handle = rep->map_handle;
 187     buf->map_count = 0;
 188     buf->size = size;
 189
 190     *handle = rep->handle;
 191
 192     return buf;
 193
 194 err_free:
 195     xfree(buf);
 196 err:
 197     return NULL;
 198 }
 199
 200 void
 201 vmw_ioctl_buffer_destroy(struct vmw_customizer *vmw, struct vmw_dma_buffer *buf)
 202 {
 203     struct drm_vmw_unref_dmabuf_arg arg;
 204
 205     if (buf->data) {
 206         munmap(buf->data, buf->size);
 207         buf->data = NULL;
 208     }
 209
 210     memset(&arg, 0, sizeof(arg));
 211     arg.handle = buf->handle;
 212     drmCommandWrite(vmw->fd, DRM_VMW_UNREF_DMABUF, &arg, sizeof(arg));
 213
 214     xfree(buf);
 215 }
 216
 217 void *
 218 vmw_ioctl_buffer_map(struct vmw_customizer *vmw, struct vmw_dma_buffer *buf)
 219 {
 220     void *map;
 221
 222     if (buf->data == NULL) {
 223         map = mmap(NULL, buf->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 224                    vmw->fd, buf->map_handle);
 225         if (map == MAP_FAILED) {
 226             debug_printf("%s: Map failed.\n", __FUNCTION__);
 227             return NULL;
 228         }
 229
 230         buf->data = map;
 231     }
 232
 233     ++buf->map_count;
 234
 235     return buf->data;
 236 }
 237
 238 void
 239 vmw_ioctl_buffer_unmap(struct vmw_customizer *vmw, struct vmw_dma_buffer *buf)
 240 {
 241     --buf->map_count;
 242 }