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 #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                    void *flush_ctx)
 125 {
 126    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 127    return buf->map;
 128 }
 129
 130
 131 static void
 132 vmw_gmr_buffer_unmap(struct pb_buffer *_buf)
 133 {
 134    /* Do nothing */
 135    (void)_buf;
 136 }
 137
 138
 139 static void
 140 vmw_gmr_buffer_get_base_buffer(struct pb_buffer *buf,
 141                            struct pb_buffer **base_buf,
 142                            unsigned *offset)
 143 {
 144    *base_buf = buf;
 145    *offset = 0;
 146 }
 147
 148
 149 static enum pipe_error
 150 vmw_gmr_buffer_validate( struct pb_buffer *_buf,
 151                          struct pb_validate *vl,
 152                          unsigned flags )
 153 {
 154    /* Always pinned */
 155    return PIPE_OK;
 156 }
 157
 158
 159 static void
 160 vmw_gmr_buffer_fence( struct pb_buffer *_buf,
 161                       struct pipe_fence_handle *fence )
 162 {
 163    /* We don't need to do anything, as the pipebuffer library
 164     * will take care of delaying the destruction of fenced buffers */
 165 #ifdef DEBUG
 166    struct vmw_gmr_buffer *buf = vmw_gmr_buffer(_buf);
 167    if(fence)
 168       buf->last_fence = fence;
 169 #endif
 170 }
 171
 172
 173 const struct pb_vtbl vmw_gmr_buffer_vtbl = {
 174    vmw_gmr_buffer_destroy,
 175    vmw_gmr_buffer_map,
 176    vmw_gmr_buffer_unmap,
 177    vmw_gmr_buffer_validate,
 178    vmw_gmr_buffer_fence,
 179    vmw_gmr_buffer_get_base_buffer
 180 };
 181
 182
 183 static struct pb_buffer *
 184 vmw_gmr_bufmgr_create_buffer(struct pb_manager *_mgr,
 185                          pb_size size,
 186                          const struct pb_desc *desc)
 187 {
 188    struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
 189    struct vmw_winsys_screen *vws = mgr->vws;
 190    struct vmw_gmr_buffer *buf;
 191
 192    buf = CALLOC_STRUCT(vmw_gmr_buffer);
 193    if(!buf)
 194       goto error1;
 195
 196    pipe_reference_init(&buf->base.base.reference, 1);
 197    buf->base.base.alignment = desc->alignment;
 198    buf->base.base.usage = desc->usage;
 199    buf->base.base.size = size;
 200    buf->base.vtbl = &vmw_gmr_buffer_vtbl;
 201    buf->mgr = mgr;
 202
 203    buf->region = vmw_ioctl_region_create(vws, size);
 204    if(!buf->region)
 205       goto error2;
 206
 207    buf->map = vmw_ioctl_region_map(buf->region);
 208    if(!buf->map)
 209       goto error3;
 210
 211    return &buf->base;
 212
 213 error3:
 214    vmw_ioctl_region_destroy(buf->region);
 215 error2:
 216    FREE(buf);
 217 error1:
 218    return NULL;
 219 }
 220
 221
 222 static void
 223 vmw_gmr_bufmgr_flush(struct pb_manager *mgr)
 224 {
 225    /* No-op */
 226 }
 227
 228
 229 static void
 230 vmw_gmr_bufmgr_destroy(struct pb_manager *_mgr)
 231 {
 232    struct vmw_gmr_bufmgr *mgr = vmw_gmr_bufmgr(_mgr);
 233    FREE(mgr);
 234 }
 235
 236
 237 struct pb_manager *
 238 vmw_gmr_bufmgr_create(struct vmw_winsys_screen *vws)
 239 {
 240    struct vmw_gmr_bufmgr *mgr;
 241
 242    mgr = CALLOC_STRUCT(vmw_gmr_bufmgr);
 243    if(!mgr)
 244       return NULL;
 245
 246    mgr->base.destroy = vmw_gmr_bufmgr_destroy;
 247    mgr->base.create_buffer = vmw_gmr_bufmgr_create_buffer;
 248    mgr->base.flush = vmw_gmr_bufmgr_flush;
 249
 250    mgr->vws = vws;
 251
 252    return &mgr->base;
 253 }
 254
 255
 256 boolean
 257 vmw_gmr_bufmgr_region_ptr(struct pb_buffer *buf,
 258                           struct SVGAGuestPtr *ptr)
 259 {
 260    struct pb_buffer *base_buf;
 261    unsigned offset = 0;
 262    struct vmw_gmr_buffer *gmr_buf;
 263
 264    pb_get_base_buffer( buf, &base_buf, &offset );
 265
 266    gmr_buf = vmw_gmr_buffer(base_buf);
 267    if(!gmr_buf)
 268       return FALSE;
 269
 270    *ptr = vmw_ioctl_region_ptr(gmr_buf->region);
 271
 272    ptr->offset += offset;
 273
 274    return TRUE;
 275 }