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,
   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  * 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 #ifdef DEBUG
  68    struct pipe_fence_handle *last_fence;
  69 #endif
  70 };
  71
  72
  73 extern const struct pb_vtbl vmw_gmr_buffer_vtbl;
  74
  75
  76 static INLINE struct vmw_gmr_buffer *
  77 vmw_gmr_buffer(struct pb_buffer *buf)
  78 {
  79    assert(buf);
  80    assert(buf->vtbl == &vmw_gmr_buffer_vtbl);
  81    return (struct vmw_gmr_buffer *)buf;
  82 }
  83
  84
  85 struct vmw_gmr_bufmgr
  86 {
  87    struct pb_manager base;
  88
  89    struct vmw_winsys_screen *vws;
  90 };
  91
  92
  93 static INLINE struct vmw_gmr_bufmgr *
  94 vmw_gmr_bufmgr(struct pb_manager *mgr)
  95 {
  96    assert(mgr);
  97    return (struct vmw_gmr_bufmgr *)mgr;
  98 }
  99
 100
 101 static void
 102 vmw_gmr_buffer_destroy(struct pb_buffer *_buf)
 103 {
 104    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 105
 106 #ifdef DEBUG
 107    if(buf->last_fence) {
 108       struct svga_winsys_screen *sws = &buf->mgr->vws->base;
 109       assert(sws->fence_signalled(sws, buf->last_fence, 0) == 0);
 110    }
 111 #endif
 112
 113    vmw_ioctl_region_unmap(buf->region);
 114
 115    vmw_ioctl_region_destroy(buf->region);
 116
 117    FREE(buf);
 118 }
 119
 120
 121 static void *
 122 vmw_gmr_buffer_map(struct pb_buffer *_buf,
 123                unsigned flags)
 124 {
 125    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 126    return buf->map;
 127 }
 128
 129
 130 static void
 131 vmw_gmr_buffer_unmap(struct pb_buffer *_buf)
 132 {
 133    /* Do nothing */
 134    (void)_buf;
 135 }
 136
 137
 138 static void
 139 vmw_gmr_buffer_get_base_buffer(struct pb_buffer *buf,
 140                            struct pb_buffer **base_buf,
 141                            unsigned *offset)
 142 {
 143    *base_buf = buf;
 144    *offset = 0;
 145 }
 146
 147
 148 static enum pipe_error
 149 vmw_gmr_buffer_validate( struct pb_buffer *_buf,
 150                          struct pb_validate *vl,
 151                          unsigned flags )
 152 {
 153    /* Always pinned */
 154    return PIPE_OK;
 155 }
 156
 157
 158 static void
 159 vmw_gmr_buffer_fence( struct pb_buffer *_buf,
 160                       struct pipe_fence_handle *fence )
 161 {
 162    /* We don't need to do anything, as the pipebuffer library
 163     * will take care of delaying the destruction of fenced buffers */
 164 #ifdef DEBUG
 165    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 166    if(fence)
 167       buf->last_fence = fence;
 168 #endif
 169 }
 170
 171
 172 const struct pb_vtbl vmw_gmr_buffer_vtbl = {
 173    vmw_gmr_buffer_destroy,
 174    vmw_gmr_buffer_map,
 175    vmw_gmr_buffer_unmap,
 176    vmw_gmr_buffer_validate,
 177    vmw_gmr_buffer_fence,
 178    vmw_gmr_buffer_get_base_buffer
 179 };
 180
 181
 182 static struct pb_buffer *
 183 vmw_gmr_bufmgr_create_buffer(struct pb_manager *_mgr,
 184                          pb_size size,
 185                          const struct pb_desc *desc)
 186 {
 187    struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
 188    struct vmw_winsys_screen *vws = mgr->vws;
 189    struct vmw_gmr_buffer *buf;
 190
 191    buf = CALLOC_STRUCT(vmw_gmr_buffer);
 192    if(!buf)
 193       goto error1;
 194
 195    pipe_reference_init(&buf->base.base.reference, 1);
 196    buf->base.base.alignment = desc->alignment;
 197    buf->base.base.usage = desc->usage;
 198    buf->base.base.size = size;
 199    buf->base.vtbl = &vmw_gmr_buffer_vtbl;
 200    buf->mgr = mgr;
 201
 202    buf->region = vmw_ioctl_region_create(vws, size);
 203    if(!buf->region)
 204       goto error2;
 205
 206    buf->map = vmw_ioctl_region_map(buf->region);
 207    if(!buf->map)
 208       goto error3;
 209
 210    return &buf->base;
 211
 212 error3:
 213    vmw_ioctl_region_destroy(buf->region);
 214 error2:
 215    FREE(buf);
 216 error1:
 217    return NULL;
 218 }
 219
 220
 221 static void
 222 vmw_gmr_bufmgr_flush(struct pb_manager *mgr)
 223 {
 224    /* No-op */
 225 }
 226
 227
 228 static void
 229 vmw_gmr_bufmgr_destroy(struct pb_manager *_mgr)
 230 {
 231    struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
 232    FREE(mgr);
 233 }
 234
 235
 236 struct pb_manager *
 237 vmw_gmr_bufmgr_create(struct vmw_winsys_screen *vws)
 238 {
 239    struct vmw_gmr_bufmgr *mgr;
 240
 241    mgr = CALLOC_STRUCT(vmw_gmr_bufmgr);
 242    if(!mgr)
 243       return NULL;
 244
 245    mgr->base.destroy = vmw_gmr_bufmgr_destroy;
 246    mgr->base.create_buffer = vmw_gmr_bufmgr_create_buffer;
 247    mgr->base.flush = vmw_gmr_bufmgr_flush;
 248
 249    mgr->vws = vws;
 250
 251    return &mgr->base;
 252 }
 253
 254
 255 boolean
 256 vmw_gmr_bufmgr_region_ptr(struct pb_buffer *buf,
 257                           struct SVGAGuestPtr *ptr)
 258 {
 259    struct pb_buffer *base_buf;
 260    unsigned offset = 0;
 261    struct vmw_gmr_buffer *gmr_buf;
 262
 263    pb_get_base_buffer( buf, &base_buf, &offset );
 264
 265    gmr_buf = vmw_gmr_buffer(base_buf);
 266    if(!gmr_buf)
 267       return FALSE;
 268
 269    *ptr = vmw_ioctl_region_ptr(gmr_buf->region);
 270
 271    ptr->offset += offset;
 272
 273    return TRUE;
 274 }