src/gallium/drivers/svga/svga_resource_buffer.h

   1 /**********************************************************
   2  * Copyright 2008-2009 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 #ifndef SVGA_BUFFER_H
  27 #define SVGA_BUFFER_H
  28
  29
  30 #include "pipe/p_compiler.h"
  31 #include "pipe/p_state.h"
  32 #include "util/u_transfer.h"
  33
  34 #include "util/u_double_list.h"
  35
  36 #include "svga_screen_cache.h"
  37
  38
  39 /**
  40  * Maximum number of discontiguous ranges
  41  */
  42 #define SVGA_BUFFER_MAX_RANGES 32
  43
  44
  45 struct svga_screen;
  46 struct svga_context;
  47 struct svga_winsys_buffer;
  48 struct svga_winsys_surface;
  49
  50
  51 extern struct u_resource_vtbl svga_buffer_vtbl;
  52
  53 struct svga_buffer_range
  54 {
  55    unsigned start;
  56    unsigned end;
  57 };
  58
  59
  60 /**
  61  * SVGA pipe buffer.
  62  */
  63 struct svga_buffer
  64 {
  65    struct u_resource b;
  66
  67    /**
  68     * Regular (non DMA'able) memory.
  69     *
  70     * Used for user buffers or for buffers which we know before hand that can
  71     * never be used by the virtual hardware directly, such as constant buffers.
  72     */
  73    void *swbuf;
  74
  75    /**
  76     * Whether swbuf was created by the user or not.
  77     */
  78    boolean user;
  79
  80    /**
  81     * Creation key for the host surface handle.
  82     *
  83     * This structure describes all the host surface characteristics so that it
  84     * can be looked up in cache, since creating a host surface is often a slow
  85     * operation.
  86     */
  87    struct svga_host_surface_cache_key key;
  88
  89    /**
  90     * Host surface handle.
  91     *
  92     * This is a platform independent abstraction for host SID. We create when
  93     * trying to bind
  94     */
  95    struct svga_winsys_surface *handle;
  96
  97    /**
  98     * Information about ongoing and past map operations.
  99     */
 100    struct {
 101       /**
 102        * Number of concurrent mappings.
 103        */
 104       unsigned count;
 105
 106       /**
 107        * Dirty ranges.
 108        *
 109        * Ranges that were touched by the application and need to be uploaded to
 110        * the host.
 111        *
 112        * This information will be copied into dma.boxes, when emiting the
 113        * SVGA3dCmdSurfaceDMA command.
 114        */
 115       struct svga_buffer_range ranges[SVGA_BUFFER_MAX_RANGES];
 116       unsigned num_ranges;
 117    } map;
 118
 119    /**
 120     * Information about uploaded version of user buffers.
 121     */
 122    struct {
 123       struct pipe_resource *buffer;
 124
 125       /**
 126        * We combine multiple user buffers into the same hardware buffer. This
 127        * is the relative offset within that buffer.
 128        */
 129       unsigned offset;
 130    } uploaded;
 131
 132    /**
 133     * DMA'ble memory.
 134     *
 135     * A piece of GMR memory, with the same size of the buffer. It is created
 136     * when mapping the buffer, and will be used to upload vertex data to the
 137     * host.
 138     */
 139    struct svga_winsys_buffer *hwbuf;
 140
 141    /**
 142     * Information about pending DMA uploads.
 143     *
 144     */
 145    struct {
 146       /**
 147        * Whether this buffer has an unfinished DMA upload command.
 148        *
 149        * If not set then the rest of the information is null.
 150        */
 151       boolean pending;
 152
 153       SVGA3dSurfaceDMAFlags flags;
 154
 155       /**
 156        * Pointer to the DMA copy box *inside* the command buffer.
 157        */
 158       SVGA3dCopyBox *boxes;
 159
 160       /**
 161        * Context that has the pending DMA to this buffer.
 162        */
 163       struct svga_context *svga;
 164    } dma;
 165
 166    /**
 167     * Linked list head, used to gather all buffers with pending dma uploads on
 168     * a context. It is only valid if the dma.pending is set above.
 169     */
 170    struct list_head head;
 171 };
 172
 173
 174 static INLINE struct svga_buffer *
 175 svga_buffer(struct pipe_resource *buffer)
 176 {
 177    if (buffer) {
 178       assert(((struct svga_buffer *)buffer)->b.vtbl == &svga_buffer_vtbl);
 179       return (struct svga_buffer *)buffer;
 180    }
 181    return NULL;
 182 }
 183
 184
 185 /**
 186  * Returns TRUE for user buffers.  We may
 187  * decide to use an alternate upload path for these buffers.
 188  */
 189 static INLINE boolean
 190 svga_buffer_is_user_buffer( struct pipe_resource *buffer )
 191 {
 192    return svga_buffer(buffer)->user;
 193 }
 194
 195
 196
 197
 198 struct pipe_resource *
 199 svga_user_buffer_create(struct pipe_screen *screen,
 200                         void *ptr,
 201                         unsigned bytes,
 202                         unsigned usage);
 203
 204 struct pipe_resource *
 205 svga_buffer_create(struct pipe_screen *screen,
 206                    const struct pipe_resource *template);
 207
 208
 209
 210 /**
 211  * Get the host surface handle for this buffer.
 212  *
 213  * This will ensure the host surface is updated, issuing DMAs as needed.
 214  *
 215  * NOTE: This may insert new commands in the context, so it *must* be called
 216  * before reserving command buffer space. And, in order to insert commands
 217  * it may need to call svga_context_flush().
 218  */
 219 struct svga_winsys_surface *
 220 svga_buffer_handle(struct svga_context *svga,
 221                    struct pipe_resource *buf);
 222
 223 void
 224 svga_context_flush_buffers(struct svga_context *svga);
 225
 226 struct svga_winsys_buffer *
 227 svga_winsys_buffer_create(struct svga_context *svga,
 228                           unsigned alignment,
 229                           unsigned usage,
 230                           unsigned size);
 231
 232 void
 233 svga_redefine_user_buffer(struct pipe_context *ctx,
 234                           struct pipe_resource *resource,
 235                           unsigned offset,
 236                           unsigned size);
 237
 238 #endif /* SVGA_BUFFER_H */