src/gallium/winsys/svga/drm/vmw_buffer.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,
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   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  * SVGA buffer manager for Guest Memory Regions (GMRs).
  29  *
  30  * GMRs are used for pixel and vertex data upload/download to/from the virtual
  31  * SVGA hardware. There is a limited number of GMRs available, and
  32  * creating/destroying them is also a slow operation so we must suballocate
  33  * them.
  34  *
  35  * This file implements a pipebuffer library's buffer manager, so that we can
  36  * use pipepbuffer's suballocation, fencing, and debugging facilities with GMRs.
  37  *
  38  * @author Jose Fonseca <jfonseca@vmware.com>
  39  */
  40
  41
  42 #include "svga_cmd.h"
  43
  44 #include "util/u_inlines.h"
  45 #include "util/u_memory.h"
  46 #include "pipebuffer/pb_buffer.h"
  47 #include "pipebuffer/pb_bufmgr.h"
  48
  49 #include "svga_winsys.h"
  50
  51 #include "vmw_screen.h"
  52 #include "vmw_buffer.h"
  53
  54
  55 struct vmw_gmr_bufmgr;
  56
  57
  58 struct vmw_gmr_buffer
  59 {
  60    struct pb_buffer base;
  61
  62    struct vmw_gmr_bufmgr *mgr;
  63
  64    struct vmw_region *region;
  65    void *map;
  66 };
  67
  68
  69 extern const struct pb_vtbl vmw_gmr_buffer_vtbl;
  70
  71
  72 static INLINE struct vmw_gmr_buffer *
  73 vmw_gmr_buffer(struct pb_buffer *buf)
  74 {
  75    assert(buf);
  76    assert(buf->vtbl == &vmw_gmr_buffer_vtbl);
  77    return (struct vmw_gmr_buffer *)buf;
  78 }
  79
  80
  81 struct vmw_gmr_bufmgr
  82 {
  83    struct pb_manager base;
  84
  85    struct vmw_winsys_screen *vws;
  86 };
  87
  88
  89 static INLINE struct vmw_gmr_bufmgr *
  90 vmw_gmr_bufmgr(struct pb_manager *mgr)
  91 {
  92    assert(mgr);
  93    return (struct vmw_gmr_bufmgr *)mgr;
  94 }
  95
  96
  97 static void
  98 vmw_gmr_buffer_destroy(struct pb_buffer *_buf)
  99 {
 100    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 101
 102    vmw_ioctl_region_unmap(buf->region);
 103
 104    vmw_ioctl_region_destroy(buf->region);
 105
 106    FREE(buf);
 107 }
 108
 109
 110 static void *
 111 vmw_gmr_buffer_map(struct pb_buffer *_buf,
 112                    unsigned flags,
 113                    void *flush_ctx)
 114 {
 115    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 116    return buf->map;
 117 }
 118
 119
 120 static void
 121 vmw_gmr_buffer_unmap(struct pb_buffer *_buf)
 122 {
 123    /* Do nothing */
 124    (void)_buf;
 125 }
 126
 127
 128 static void
 129 vmw_gmr_buffer_get_base_buffer(struct pb_buffer *buf,
 130                            struct pb_buffer **base_buf,
 131                            unsigned *offset)
 132 {
 133    *base_buf = buf;
 134    *offset = 0;
 135 }
 136
 137
 138 static enum pipe_error
 139 vmw_gmr_buffer_validate( struct pb_buffer *_buf,
 140                          struct pb_validate *vl,
 141                          unsigned flags )
 142 {
 143    /* Always pinned */
 144    return PIPE_OK;
 145 }
 146
 147
 148 static void
 149 vmw_gmr_buffer_fence( struct pb_buffer *_buf,
 150                       struct pipe_fence_handle *fence )
 151 {
 152    /* We don't need to do anything, as the pipebuffer library
 153     * will take care of delaying the destruction of fenced buffers */
 154 }
 155
 156
 157 const struct pb_vtbl vmw_gmr_buffer_vtbl = {
 158    vmw_gmr_buffer_destroy,
 159    vmw_gmr_buffer_map,
 160    vmw_gmr_buffer_unmap,
 161    vmw_gmr_buffer_validate,
 162    vmw_gmr_buffer_fence,
 163    vmw_gmr_buffer_get_base_buffer
 164 };
 165
 166
 167 static struct pb_buffer *
 168 vmw_gmr_bufmgr_create_buffer(struct pb_manager *_mgr,
 169                          pb_size size,
 170                          const struct pb_desc *desc)
 171 {
 172    struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
 173    struct vmw_winsys_screen *vws = mgr->vws;
 174    struct vmw_gmr_buffer *buf;
 175
 176    buf = CALLOC_STRUCT(vmw_gmr_buffer);
 177    if(!buf)
 178       goto error1;
 179
 180    pipe_reference_init(&buf->base.reference, 1);
 181    buf->base.alignment = desc->alignment;
 182    buf->base.usage = desc->usage;
 183    buf->base.size = size;
 184    buf->base.vtbl = &vmw_gmr_buffer_vtbl;
 185    buf->mgr = mgr;
 186
 187    buf->region = vmw_ioctl_region_create(vws, size);
 188    if(!buf->region)
 189       goto error2;
 190
 191    buf->map = vmw_ioctl_region_map(buf->region);
 192    if(!buf->map)
 193       goto error3;
 194
 195    return &buf->base;
 196
 197 error3:
 198    vmw_ioctl_region_destroy(buf->region);
 199 error2:
 200    FREE(buf);
 201 error1:
 202    return NULL;
 203 }
 204
 205
 206 static void
 207 vmw_gmr_bufmgr_flush(struct pb_manager *mgr)
 208 {
 209    /* No-op */
 210 }
 211
 212
 213 static void
 214 vmw_gmr_bufmgr_destroy(struct pb_manager *_mgr)
 215 {
 216    struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
 217    FREE(mgr);
 218 }
 219
 220
 221 struct pb_manager *
 222 vmw_gmr_bufmgr_create(struct vmw_winsys_screen *vws)
 223 {
 224    struct vmw_gmr_bufmgr *mgr;
 225
 226    mgr = CALLOC_STRUCT(vmw_gmr_bufmgr);
 227    if(!mgr)
 228       return NULL;
 229
 230    mgr->base.destroy = vmw_gmr_bufmgr_destroy;
 231    mgr->base.create_buffer = vmw_gmr_bufmgr_create_buffer;
 232    mgr->base.flush = vmw_gmr_bufmgr_flush;
 233
 234    mgr->vws = vws;
 235
 236    return &mgr->base;
 237 }
 238
 239
 240 boolean
 241 vmw_gmr_bufmgr_region_ptr(struct pb_buffer *buf,
 242                           struct SVGAGuestPtr *ptr)
 243 {
 244    struct pb_buffer *base_buf;
 245    unsigned offset = 0;
 246    struct vmw_gmr_buffer *gmr_buf;
 247
 248    pb_get_base_buffer( buf, &base_buf, &offset );
 249
 250    gmr_buf = vmw_gmr_buffer(base_buf);
 251    if(!gmr_buf)
 252       return FALSE;
 253
 254    *ptr = vmw_ioctl_region_ptr(gmr_buf->region);
 255
 256    ptr->offset += offset;
 257
 258    return TRUE;
 259 }