src/gallium/drivers/i965/brw_winsys.h

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 Jakob Bornecrantz
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  **************************************************************************/
  25
  26 #ifndef BRW_WINSYS_H
  27 #define BRW_WINSYS_H
  28
  29 #include "pipe/p_compiler.h"
  30
  31 struct brw_winsys;
  32 struct pipe_fence_handle;
  33
  34 /* This currently just wraps dri_bo:
  35  */
  36 struct brw_winsys_buffer {
  37    struct brw_winsys_screen *sws;
  38    void *bo;
  39    unsigned offset;
  40    unsigned size;
  41 };
  42
  43 enum brw_buffer_usage {
  44    I915_GEM_DOMAIN_RENDER,
  45    I915_GEM_DOMAIN_SAMPLER,
  46    I915_GEM_DOMAIN_VERTEX,
  47    I915_GEM_DOMAIN_INSTRUCTION,
  48
  49
  50    /* XXX: migrate from domains to explicit usage cases, eg below:
  51     */
  52
  53    /* use on textures */
  54    BRW_USAGE_RENDER    = 0x01,
  55    BRW_USAGE_SAMPLER   = 0x02,
  56    BRW_USAGE_2D_TARGET = 0x04,
  57    BRW_USAGE_2D_SOURCE = 0x08,
  58    /* use on vertex */
  59    BRW_USAGE_VERTEX    = 0x10,
  60 };
  61
  62 enum brw_buffer_type
  63 {
  64    BRW_BUFFER_TYPE_TEXTURE,
  65    BRW_BUFFER_TYPE_SCANOUT, /**< a texture used for scanning out from */
  66    BRW_BUFFER_TYPE_VERTEX,
  67    BRW_BUFFER_TYPE_CURBE,
  68    BRW_BUFFER_TYPE_QUERY,
  69    BRW_BUFFER_TYPE_SHADER_CONSTANTS,
  70    BRW_BUFFER_TYPE_WM_SCRATCH,
  71    BRW_BUFFER_TYPE_BATCH,
  72    BRW_BUFFER_TYPE_STATE_CACHE,
  73 };
  74
  75
  76 /* AKA winsys context:
  77  */
  78 struct brw_batchbuffer {
  79
  80    struct brw_winsys *iws;
  81    struct brw_winsys_buffer *buf;
  82
  83    /**
  84     * Values exported to speed up the writing the batchbuffer,
  85     * instead of having to go trough a accesor function for
  86     * each dword written.
  87     */
  88    /*{@*/
  89    uint8_t *map;
  90    uint8_t *ptr;
  91    size_t size;
  92    struct {
  93       uint8_t *end_ptr;
  94    } emit;
  95
  96
  97    size_t relocs;
  98    size_t max_relocs;
  99    /*@}*/
 100 };
 101
 102 struct brw_winsys_screen {
 103
 104    /**
 105     * Batchbuffer functions.
 106     */
 107    /*@{*/
 108    /**
 109     * Create a new batchbuffer.
 110     */
 111    struct brw_batchbuffer *(*batchbuffer_create)(struct brw_winsys_screen *iws);
 112
 113    /**
 114     * Emit a relocation to a buffer.
 115     * Target position in batchbuffer is the same as ptr.
 116     */
 117    int (*batchbuffer_reloc)(struct brw_batchbuffer *batch,
 118                             unsigned offset,
 119                             struct brw_winsys_buffer *reloc,
 120                             unsigned pre_add,
 121                             enum brw_buffer_usage usage);
 122
 123    /**
 124     * Flush a bufferbatch.
 125     */
 126    void (*batchbuffer_flush)(struct brw_batchbuffer *batch,
 127                              struct pipe_fence_handle **fence);
 128
 129    /**
 130     * Destroy a batchbuffer.
 131     */
 132    void (*batchbuffer_destroy)(struct brw_batchbuffer *batch);
 133    /*@}*/
 134
 135
 136    /**
 137     * Buffer functions.
 138     */
 139
 140    /*@{*/
 141    /**
 142     * Create a buffer.
 143     */
 144    struct brw_winsys_buffer *(*bo_alloc)( struct brw_winsys_screen *sws,
 145                                           enum brw_buffer_type type,
 146                                           unsigned size,
 147                                           unsigned alignment );
 148
 149    /* Reference and unreference buffers:
 150     */
 151    void (*bo_reference)( struct brw_winsys_buffer *buffer );
 152    void (*bo_unreference)( struct brw_winsys_buffer *buffer );
 153    void (*bo_emit_reloc)( struct brw_winsys_buffer *buffer,
 154                           unsigned domain,
 155                           unsigned a,
 156                           unsigned b,
 157                           unsigned offset,
 158                           struct brw_winsys_buffer *b2);
 159
 160    void (*bo_subdata)(struct brw_winsys_buffer *buffer,
 161                       size_t offset,
 162                       size_t size,
 163                       const void *data);
 164
 165    boolean (*bo_is_busy)(struct brw_winsys_buffer *buffer);
 166    boolean (*bo_references)(struct brw_winsys_buffer *a,
 167                             struct brw_winsys_buffer *b);
 168
 169    /* XXX: couldn't this be handled by returning true/false on
 170     * bo_emit_reloc?
 171     */
 172    boolean (*check_aperture_space)( struct brw_winsys_screen *iws,
 173                                     struct brw_winsys_buffer **buffers,
 174                                     unsigned count );
 175
 176    /**
 177     * Map a buffer.
 178     */
 179    void *(*bo_map)(struct brw_winsys_buffer *buffer,
 180                    boolean write);
 181
 182    /**
 183     * Unmap a buffer.
 184     */
 185    void (*bo_unmap)(struct brw_winsys_buffer *buffer);
 186    /*@}*/
 187
 188
 189    /**
 190     * Fence functions.
 191     */
 192    /*@{*/
 193    /**
 194     * Reference fence and set ptr to fence.
 195     */
 196    void (*fence_reference)(struct brw_winsys *iws,
 197                            struct pipe_fence_handle **ptr,
 198                            struct pipe_fence_handle *fence);
 199
 200    /**
 201     * Check if a fence has finished.
 202     */
 203    int (*fence_signalled)(struct brw_winsys *iws,
 204                           struct pipe_fence_handle *fence);
 205
 206    /**
 207     * Wait on a fence to finish.
 208     */
 209    int (*fence_finish)(struct brw_winsys *iws,
 210                        struct pipe_fence_handle *fence);
 211    /*@}*/
 212
 213
 214    /**
 215     * Destroy the winsys.
 216     */
 217    void (*destroy)(struct brw_winsys *iws);
 218 };
 219
 220
 221 /**
 222  * Create brw pipe_screen.
 223  */
 224 struct pipe_screen *brw_create_screen(struct brw_winsys *iws, unsigned pci_id);
 225
 226 /**
 227  * Create a brw pipe_context.
 228  */
 229 struct pipe_context *brw_create_context(struct pipe_screen *screen);
 230
 231 /**
 232  * Get the brw_winsys buffer backing the texture.
 233  *
 234  * TODO UGLY
 235  */
 236 struct pipe_texture;
 237 boolean brw_get_texture_buffer_brw(struct pipe_texture *texture,
 238                                     struct brw_winsys_buffer **buffer,
 239                                     unsigned *stride);
 240
 241 /**
 242  * Wrap a brw_winsys buffer with a texture blanket.
 243  *
 244  * TODO UGLY
 245  */
 246 struct pipe_texture * brw_texture_blanket_ws(struct pipe_screen *screen,
 247                                              const struct pipe_texture *tmplt,
 248                                              const unsigned *stride,
 249                                              struct brw_winsys_buffer *buffer);
 250
 251
 252
 253
 254 #endif