src/gallium/drivers/svga/svga_screen_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:
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  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,
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  22  * SOFTWARE.
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  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
  33 #include "util/u_double_list.h"
  34
  35 #include "svga_screen_cache.h"
  36
  37
  38 #define SVGA_BUFFER_MAGIC 0x344f9005
  39
  40 /**
  41  * Maximum number of discontiguous ranges
  42  */
  43 #define SVGA_BUFFER_MAX_RANGES 32
  44
  45
  46 struct svga_screen;
  47 struct svga_context;
  48 struct svga_winsys_buffer;
  49 struct svga_winsys_surface;
  50
  51
  52 struct svga_buffer_range
  53 {
  54    unsigned start;
  55    unsigned end;
  56 };
  57
  58
  59 /**
  60  * SVGA pipe buffer.
  61  */
  62 struct svga_buffer
  63 {
  64    struct pipe_buffer base;
  65
  66    /**
  67     * Marker to detect bad casts in runtime.
  68     */
  69    uint32_t magic;
  70
  71    /**
  72     * Regular (non DMA'able) memory.
  73     *
  74     * Used for user buffers or for buffers which we know before hand that can
  75     * never be used by the virtual hardware directly, such as constant buffers.
  76     */
  77    void *swbuf;
  78
  79    /**
  80     * Whether swbuf was created by the user or not.
  81     */
  82    boolean user;
  83
  84    /**
  85     * Creation key for the host surface handle.
  86     *
  87     * This structure describes all the host surface characteristics so that it
  88     * can be looked up in cache, since creating a host surface is often a slow
  89     * operation.
  90     */
  91    struct svga_host_surface_cache_key key;
  92
  93    /**
  94     * Host surface handle.
  95     *
  96     * This is a platform independent abstraction for host SID. We create when
  97     * trying to bind
  98     */
  99    struct svga_winsys_surface *handle;
 100
 101    /**
 102     * Information about ongoing and past map operations.
 103     */
 104    struct {
 105       /**
 106        * Number of concurrent mappings.
 107        *
 108        * XXX: It is impossible to guarantee concurrent maps work in all
 109        * circumstances -- pipe_buffers really need transfer objects too.
 110        */
 111       unsigned count;
 112
 113       /**
 114        * Whether this buffer is currently mapped for writing.
 115        */
 116       boolean writing;
 117
 118       /**
 119        * Whether the application will tell us explicity which ranges it touched
 120        * or not.
 121        */
 122       boolean flush_explicit;
 123
 124       /**
 125        * Dirty ranges.
 126        *
 127        * Ranges that were touched by the application and need to be uploaded to
 128        * the host.
 129        *
 130        * This information will be copied into dma.boxes, when emiting the
 131        * SVGA3dCmdSurfaceDMA command.
 132        */
 133       struct svga_buffer_range ranges[SVGA_BUFFER_MAX_RANGES];
 134       unsigned num_ranges;
 135    } map;
 136
 137    /**
 138     * DMA'ble memory.
 139     *
 140     * A piece of GMR memory, with the same size of the buffer. It is created
 141     * when mapping the buffer, and will be used to upload vertex data to the
 142     * host.
 143     */
 144    struct svga_winsys_buffer *hwbuf;
 145
 146    /**
 147     * Information about pending DMA uploads.
 148     *
 149     */
 150    struct {
 151       /**
 152        * Whether this buffer has an unfinished DMA upload command.
 153        *
 154        * If not set then the rest of the information is null.
 155        */
 156       boolean pending;
 157
 158       SVGA3dSurfaceDMAFlags flags;
 159
 160       /**
 161        * Pointer to the DMA copy box *inside* the command buffer.
 162        */
 163       SVGA3dCopyBox *boxes;
 164
 165       /**
 166        * Context that has the pending DMA to this buffer.
 167        */
 168       struct svga_context *svga;
 169    } dma;
 170
 171    /**
 172     * Linked list head, used to gather all buffers with pending dma uploads on
 173     * a context. It is only valid if the dma.pending is set above.
 174     */
 175    struct list_head head;
 176 };
 177
 178
 179 static INLINE struct svga_buffer *
 180 svga_buffer(struct pipe_buffer *buffer)
 181 {
 182    if (buffer) {
 183       assert(((struct svga_buffer *)buffer)->magic == SVGA_BUFFER_MAGIC);
 184       return (struct svga_buffer *)buffer;
 185    }
 186    return NULL;
 187 }
 188
 189
 190 /**
 191  * Returns TRUE for user buffers.  We may
 192  * decide to use an alternate upload path for these buffers.
 193  */
 194 static INLINE boolean
 195 svga_buffer_is_user_buffer( struct pipe_buffer *buffer )
 196 {
 197    return svga_buffer(buffer)->user;
 198 }
 199
 200
 201 void
 202 svga_screen_init_buffer_functions(struct pipe_screen *screen);
 203
 204 struct svga_winsys_surface *
 205 svga_buffer_handle(struct svga_context *svga,
 206                    struct pipe_buffer *buf);
 207
 208 void
 209 svga_context_flush_buffers(struct svga_context *svga);
 210
 211 struct svga_winsys_buffer *
 212 svga_winsys_buffer_create(struct svga_screen *ss,
 213                           unsigned alignment,
 214                           unsigned usage,
 215                           unsigned size);
 216
 217 #endif /* SVGA_BUFFER_H */