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 /* Not sure why the winsys needs this:
  35  */
  36 #define BRW_BATCH_SIZE (32*1024)
  37
  38
  39 /* Need a tiny bit of information inside the abstract buffer struct:
  40  */
  41 struct brw_winsys_buffer {
  42    unsigned *offset;
  43    unsigned size;
  44 };
  45
  46 /* Describe the usage of a particular buffer in a relocation.  The DRM
  47  * winsys will translate these back to GEM read/write domain flags.
  48  */
  49 enum brw_buffer_usage {
  50    BRW_USAGE_STATE,             /* INSTRUCTION, 0 */
  51    BRW_USAGE_QUERY_RESULT,      /* INSTRUCTION, INSTRUCTION */
  52    BRW_USAGE_RENDER_TARGET,     /* RENDER,      0 */
  53    BRW_USAGE_DEPTH_BUFFER,      /* RENDER,      RENDER */
  54    BRW_USAGE_SAMPLER,           /* SAMPLER,     0 */
  55    BRW_USAGE_VERTEX,            /* VERTEX,      0 */
  56    BRW_USAGE_SCRATCH,           /* 0,           0 */
  57    BRW_USAGE_MAX
  58 };
  59
  60 /* Should be possible to validate usages above against buffer creation
  61  * types, below:
  62  */
  63 enum brw_buffer_type
  64 {
  65    BRW_BUFFER_TYPE_TEXTURE,
  66    BRW_BUFFER_TYPE_SCANOUT, /**< a texture used for scanning out from */
  67    BRW_BUFFER_TYPE_VERTEX,
  68    BRW_BUFFER_TYPE_CURBE,
  69    BRW_BUFFER_TYPE_QUERY,
  70    BRW_BUFFER_TYPE_SHADER_CONSTANTS,
  71    BRW_BUFFER_TYPE_SHADER_SCRATCH,
  72    BRW_BUFFER_TYPE_BATCH,
  73    BRW_BUFFER_TYPE_STATE_CACHE,
  74    BRW_BUFFER_TYPE_MAX          /* Count of possible values */
  75 };
  76
  77 struct brw_winsys_screen {
  78
  79
  80    /**
  81     * Buffer functions.
  82     */
  83
  84    /*@{*/
  85    /**
  86     * Create a buffer.
  87     */
  88    struct brw_winsys_buffer *(*bo_alloc)( struct brw_winsys_screen *sws,
  89                                           enum brw_buffer_type type,
  90                                           unsigned size,
  91                                           unsigned alignment );
  92
  93    /* Reference and unreference buffers:
  94     */
  95    void (*bo_reference)( struct brw_winsys_buffer *buffer );
  96    void (*bo_unreference)( struct brw_winsys_buffer *buffer );
  97
  98    /* delta -- added to b2->offset, and written into buffer
  99     * offset -- location above value is written to within buffer
 100     */
 101    int (*bo_emit_reloc)( struct brw_winsys_buffer *buffer,
 102                          enum brw_buffer_usage usage,
 103                          unsigned delta,
 104                          unsigned offset,
 105                          struct brw_winsys_buffer *b2);
 106
 107    int (*bo_exec)( struct brw_winsys_buffer *buffer,
 108                    unsigned bytes_used );
 109
 110    int (*bo_subdata)(struct brw_winsys_buffer *buffer,
 111                       size_t offset,
 112                       size_t size,
 113                       const void *data);
 114
 115    boolean (*bo_is_busy)(struct brw_winsys_buffer *buffer);
 116    boolean (*bo_references)(struct brw_winsys_buffer *a,
 117                             struct brw_winsys_buffer *b);
 118
 119    /* XXX: couldn't this be handled by returning true/false on
 120     * bo_emit_reloc?
 121     */
 122    boolean (*check_aperture_space)( struct brw_winsys_screen *iws,
 123                                     struct brw_winsys_buffer **buffers,
 124                                     unsigned count );
 125
 126    /**
 127     * Map a buffer.
 128     */
 129    void *(*bo_map)(struct brw_winsys_buffer *buffer,
 130                    boolean write);
 131
 132    /**
 133     * Unmap a buffer.
 134     */
 135    void (*bo_unmap)(struct brw_winsys_buffer *buffer);
 136    /*@}*/
 137
 138
 139
 140
 141    /**
 142     * Destroy the winsys.
 143     */
 144    void (*destroy)(struct brw_winsys_screen *iws);
 145 };
 146
 147
 148 /**
 149  * Create brw pipe_screen.
 150  */
 151 struct pipe_screen *brw_create_screen(struct brw_winsys_screen *iws, unsigned pci_id);
 152
 153 /**
 154  * Create a brw pipe_context.
 155  */
 156 struct pipe_context *brw_create_context(struct pipe_screen *screen);
 157
 158 /**
 159  * Get the brw_winsys buffer backing the texture.
 160  *
 161  * TODO UGLY
 162  */
 163 struct pipe_texture;
 164 boolean brw_texture_get_winsys_buffer(struct pipe_texture *texture,
 165                                       struct brw_winsys_buffer **buffer,
 166                                       unsigned *stride);
 167
 168 /**
 169  * Wrap a brw_winsys buffer with a texture blanket.
 170  *
 171  * TODO UGLY
 172  */
 173 struct pipe_texture *
 174 brw_texture_blanket_winsys_buffer(struct pipe_screen *screen,
 175                                   const struct pipe_texture *template,
 176                                   const unsigned pitch,
 177                                   struct brw_winsys_buffer *buffer);
 178
 179
 180
 181
 182 #endif