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
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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:
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  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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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 #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     * Only set for non-user buffers.
  96     */
  97    struct svga_winsys_surface *handle;
  98
  99    /**
 100     * Information about ongoing and past map operations.
 101     */
 102    struct {
 103       /**
 104        * Number of concurrent mappings.
 105        */
 106       unsigned count;
 107
 108       /**
 109        * Dirty ranges.
 110        *
 111        * Ranges that were touched by the application and need to be uploaded to
 112        * the host.
 113        *
 114        * This information will be copied into dma.boxes, when emiting the
 115        * SVGA3dCmdSurfaceDMA command.
 116        */
 117       struct svga_buffer_range ranges[SVGA_BUFFER_MAX_RANGES];
 118       unsigned num_ranges;
 119    } map;
 120
 121    /**
 122     * Information about uploaded version of user buffers.
 123     */
 124    struct {
 125       struct pipe_resource *buffer;
 126
 127       /**
 128        * We combine multiple user buffers into the same hardware buffer. This
 129        * is the relative offset within that buffer.
 130        */
 131       unsigned offset;
 132    } uploaded;
 133
 134    /**
 135     * For user buffers, this is the offset to the data about to be
 136     * referenced by the next draw command, and hence the data that needs
 137     * to be uploaded.
 138     */
 139    unsigned source_offset;
 140
 141    /**
 142     * DMA'ble memory.
 143     *
 144     * A piece of GMR memory, with the same size of the buffer. It is created
 145     * when mapping the buffer, and will be used to upload vertex data to the
 146     * host.
 147     *
 148     * Only set for non-user buffers.
 149     */
 150    struct svga_winsys_buffer *hwbuf;
 151
 152    /**
 153     * Information about pending DMA uploads.
 154     *
 155     */
 156    struct {
 157       /**
 158        * Whether this buffer has an unfinished DMA upload command.
 159        *
 160        * If not set then the rest of the information is null.
 161        */
 162       boolean pending;
 163
 164       SVGA3dSurfaceDMAFlags flags;
 165
 166       /**
 167        * Pointer to the DMA copy box *inside* the command buffer.
 168        */
 169       SVGA3dCopyBox *boxes;
 170
 171       /**
 172        * Context that has the pending DMA to this buffer.
 173        */
 174       struct svga_context *svga;
 175    } dma;
 176
 177    /**
 178     * Linked list head, used to gather all buffers with pending dma uploads on
 179     * a context. It is only valid if the dma.pending is set above.
 180     */
 181    struct list_head head;
 182 };
 183
 184
 185 static INLINE struct svga_buffer *
 186 svga_buffer(struct pipe_resource *buffer)
 187 {
 188    if (buffer) {
 189       assert(((struct svga_buffer *)buffer)->b.vtbl == &svga_buffer_vtbl);
 190       return (struct svga_buffer *)buffer;
 191    }
 192    return NULL;
 193 }
 194
 195
 196 /**
 197  * Returns TRUE for user buffers.  We may
 198  * decide to use an alternate upload path for these buffers.
 199  */
 200 static INLINE boolean
 201 svga_buffer_is_user_buffer( struct pipe_resource *buffer )
 202 {
 203    if (buffer) {
 204       return svga_buffer(buffer)->user;
 205    } else {
 206       return FALSE;
 207    }
 208 }
 209
 210
 211
 212
 213 struct pipe_resource *
 214 svga_user_buffer_create(struct pipe_screen *screen,
 215                         void *ptr,
 216                         unsigned bytes,
 217                         unsigned usage);
 218
 219 struct pipe_resource *
 220 svga_buffer_create(struct pipe_screen *screen,
 221                    const struct pipe_resource *template);
 222
 223
 224
 225 /**
 226  * Get the host surface handle for this buffer.
 227  *
 228  * This will ensure the host surface is updated, issuing DMAs as needed.
 229  *
 230  * NOTE: This may insert new commands in the context, so it *must* be called
 231  * before reserving command buffer space. And, in order to insert commands
 232  * it may need to call svga_context_flush().
 233  */
 234 struct svga_winsys_surface *
 235 svga_buffer_handle(struct svga_context *svga,
 236                    struct pipe_resource *buf);
 237
 238 void
 239 svga_context_flush_buffers(struct svga_context *svga);
 240
 241 struct svga_winsys_buffer *
 242 svga_winsys_buffer_create(struct svga_context *svga,
 243                           unsigned alignment,
 244                           unsigned usage,
 245                           unsigned size);
 246
 247 void
 248 svga_redefine_user_buffer(struct pipe_context *ctx,
 249                           struct pipe_resource *resource,
 250                           unsigned offset,
 251                           unsigned size);
 252
 253 #endif /* SVGA_BUFFER_H */