src/gallium/drivers/svga/svga_winsys.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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  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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  25
  26 /**
  27  * @file
  28  * VMware SVGA specific winsys interface.
  29  *
  30  * @author Jose Fonseca <jfonseca@vmware.com>
  31  *
  32  * Documentation taken from the VMware SVGA DDK.
  33  */
  34
  35 #ifndef SVGA_WINSYS_H_
  36 #define SVGA_WINSYS_H_
  37
  38
  39 #include "svga_types.h"
  40 #include "svga_reg.h"
  41 #include "svga3d_reg.h"
  42
  43 #include "pipe/p_compiler.h"
  44 #include "pipe/p_defines.h"
  45
  46
  47 struct svga_winsys_screen;
  48 struct svga_winsys_buffer;
  49 struct pipe_screen;
  50 struct pipe_context;
  51 struct pipe_fence_handle;
  52 struct pipe_texture;
  53 struct svga_region;
  54 struct winsys_handle;
  55
  56
  57 #define SVGA_BUFFER_USAGE_PINNED  (PIPE_BUFFER_USAGE_CUSTOM << 0)
  58 #define SVGA_BUFFER_USAGE_WRAPPED (PIPE_BUFFER_USAGE_CUSTOM << 1)
  59
  60
  61 /** Opaque surface handle */
  62 struct svga_winsys_surface;
  63
  64 /** Opaque buffer handle */
  65 struct svga_winsys_handle;
  66
  67
  68 /**
  69  * SVGA per-context winsys interface.
  70  */
  71 struct svga_winsys_context
  72 {
  73    void
  74    (*destroy)(struct svga_winsys_context *swc);
  75
  76    void *
  77    (*reserve)(struct svga_winsys_context *swc,
  78               uint32_t nr_bytes, uint32_t nr_relocs );
  79
  80    /**
  81     * Emit a relocation for a host surface.
  82     *
  83     * @param flags PIPE_BUFFER_USAGE_GPU_READ/WRITE
  84     *
  85     * NOTE: Order of this call does matter. It should be the same order
  86     * as relocations appear in the command buffer.
  87     */
  88    void
  89    (*surface_relocation)(struct svga_winsys_context *swc,
  90                          uint32 *sid,
  91                          struct svga_winsys_surface *surface,
  92                          unsigned flags);
  93
  94    /**
  95     * Emit a relocation for a guest memory region.
  96     *
  97     * @param flags PIPE_BUFFER_USAGE_GPU_READ/WRITE
  98     *
  99     * NOTE: Order of this call does matter. It should be the same order
 100     * as relocations appear in the command buffer.
 101     */
 102    void
 103    (*region_relocation)(struct svga_winsys_context *swc,
 104                         struct SVGAGuestPtr *ptr,
 105                         struct svga_winsys_buffer *buffer,
 106                         uint32 offset,
 107                         unsigned flags);
 108
 109    void
 110    (*commit)(struct svga_winsys_context *swc);
 111
 112    enum pipe_error
 113    (*flush)(struct svga_winsys_context *swc,
 114             struct pipe_fence_handle **pfence);
 115
 116    /**
 117     * Context ID used to fill in the commands
 118     *
 119     * Context IDs are arbitrary small non-negative integers,
 120     * global to the entire SVGA device.
 121     */
 122    uint32 cid;
 123 };
 124
 125
 126 /**
 127  * SVGA per-screen winsys interface.
 128  */
 129 struct svga_winsys_screen
 130 {
 131    void
 132    (*destroy)(struct svga_winsys_screen *sws);
 133
 134    boolean
 135    (*get_cap)(struct svga_winsys_screen *sws,
 136               SVGA3dDevCapIndex index,
 137               SVGA3dDevCapResult *result);
 138
 139    /**
 140     * Create a new context.
 141     *
 142     * Context objects encapsulate all render state, and shader
 143     * objects are per-context.
 144     *
 145     * Surfaces are not per-context. The same surface can be shared
 146     * between multiple contexts, and surface operations can occur
 147     * without a context.
 148     */
 149    struct svga_winsys_context *
 150    (*context_create)(struct svga_winsys_screen *sws);
 151
 152
 153    /**
 154     * This creates a "surface" object in the SVGA3D device,
 155     * and returns the surface ID (sid). Surfaces are generic
 156     * containers for host VRAM objects like textures, vertex
 157     * buffers, and depth/stencil buffers.
 158     *
 159     * Surfaces are hierarchial:
 160     *
 161     * - Surface may have multiple faces (for cube maps)
 162     *
 163     * - Each face has a list of mipmap levels
 164     *
 165     * - Each mipmap image may have multiple volume
 166     *   slices, if the image is three dimensional.
 167     *
 168     * - Each slice is a 2D array of 'blocks'
 169     *
 170     * - Each block may be one or more pixels.
 171     *   (Usually 1, more for DXT or YUV formats.)
 172     *
 173     * Surfaces are generic host VRAM objects. The SVGA3D device
 174     * may optimize surfaces according to the format they were
 175     * created with, but this format does not limit the ways in
 176     * which the surface may be used. For example, a depth surface
 177     * can be used as a texture, or a floating point image may
 178     * be used as a vertex buffer. Some surface usages may be
 179     * lower performance, due to software emulation, but any
 180     * usage should work with any surface.
 181     */
 182    struct svga_winsys_surface *
 183    (*surface_create)(struct svga_winsys_screen *sws,
 184                      SVGA3dSurfaceFlags flags,
 185                      SVGA3dSurfaceFormat format,
 186                      SVGA3dSize size,
 187                      uint32 numFaces,
 188                      uint32 numMipLevels);
 189
 190    /**
 191     * Creates a surface from a winsys handle.
 192     * Used to implement pipe_screen::texture_from_handle.
 193     */
 194    struct svga_winsys_surface *
 195    (*surface_from_handle)(struct svga_winsys_screen *sws,
 196                           struct winsys_handle *whandle,
 197                           SVGA3dSurfaceFormat *format);
 198
 199    /**
 200     * Get a winsys_handle from a surface.
 201     * Used to implement pipe_screen::texture_get_handle.
 202     */
 203    boolean
 204    (*surface_get_handle)(struct svga_winsys_screen *sws,
 205                          struct svga_winsys_surface *surface,
 206                          unsigned stride,
 207                          struct winsys_handle *whandle);
 208
 209    /**
 210     * Whether this surface is sitting in a validate list
 211     */
 212    boolean
 213    (*surface_is_flushed)(struct svga_winsys_screen *sws,
 214                          struct svga_winsys_surface *surface);
 215
 216    /**
 217     * Reference a SVGA3D surface object. This allows sharing of a
 218     * surface between different objects.
 219     */
 220    void
 221    (*surface_reference)(struct svga_winsys_screen *sws,
 222                         struct svga_winsys_surface **pdst,
 223                         struct svga_winsys_surface *src);
 224
 225    /**
 226     * Buffer management. Buffer attributes are mostly fixed over its lifetime.
 227     *
 228     * Remember that gallium gets to choose the interface it needs, and the
 229     * window systems must then implement that interface (rather than the
 230     * other way around...).
 231     *
 232     * usage is a bitmask of PIPE_BUFFER_USAGE_PIXEL/VERTEX/INDEX/CONSTANT. This
 233     * usage argument is only an optimization hint, not a guarantee, therefore
 234     * proper behavior must be observed in all circumstances.
 235     *
 236     * alignment indicates the client's alignment requirements, eg for
 237     * SSE instructions.
 238     */
 239    struct svga_winsys_buffer *
 240    (*buffer_create)( struct svga_winsys_screen *sws,
 241                      unsigned alignment,
 242                      unsigned usage,
 243                      unsigned size );
 244
 245    /**
 246     * Map the entire data store of a buffer object into the client's address.
 247     * flags is a bitmask of:
 248     * - PIPE_BUFFER_USAGE_CPU_READ/WRITE
 249     * - PIPE_BUFFER_USAGE_DONTBLOCK
 250     * - PIPE_BUFFER_USAGE_UNSYNCHRONIZED
 251     */
 252    void *
 253    (*buffer_map)( struct svga_winsys_screen *sws,
 254                   struct svga_winsys_buffer *buf,
 255                   unsigned usage );
 256
 257    void
 258    (*buffer_unmap)( struct svga_winsys_screen *sws,
 259                     struct svga_winsys_buffer *buf );
 260
 261    void
 262    (*buffer_destroy)( struct svga_winsys_screen *sws,
 263                       struct svga_winsys_buffer *buf );
 264
 265
 266    /**
 267     * Reference a fence object.
 268     */
 269    void
 270    (*fence_reference)( struct svga_winsys_screen *sws,
 271                        struct pipe_fence_handle **pdst,
 272                        struct pipe_fence_handle *src );
 273
 274    /**
 275     * Checks whether the fence has been signalled.
 276     * \param flags  driver-specific meaning
 277     * \return zero on success.
 278     */
 279    int (*fence_signalled)( struct svga_winsys_screen *sws,
 280                            struct pipe_fence_handle *fence,
 281                            unsigned flag );
 282
 283    /**
 284     * Wait for the fence to finish.
 285     * \param flags  driver-specific meaning
 286     * \return zero on success.
 287     */
 288    int (*fence_finish)( struct svga_winsys_screen *sws,
 289                         struct pipe_fence_handle *fence,
 290                         unsigned flag );
 291
 292 };
 293
 294
 295 struct pipe_screen *
 296 svga_screen_create(struct svga_winsys_screen *sws);
 297
 298 struct svga_winsys_screen *
 299 svga_winsys_screen(struct pipe_screen *screen);
 300
 301 struct pipe_buffer *
 302 svga_screen_buffer_wrap_surface(struct pipe_screen *screen,
 303                                 enum SVGA3dSurfaceFormat format,
 304                                 struct svga_winsys_surface *srf);
 305
 306 struct svga_winsys_surface *
 307 svga_screen_buffer_get_winsys_surface(struct pipe_buffer *buffer);
 308
 309 #endif /* SVGA_WINSYS_H_ */