src/gallium/drivers/i915/i915_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 I915_WINSYS_H
  27 #define I915_WINSYS_H
  28
  29 #include "pipe/p_compiler.h"
  30
  31 struct i915_winsys;
  32 struct i915_winsys_buffer;
  33 struct i915_winsys_batchbuffer;
  34 struct pipe_resource;
  35 struct pipe_fence_handle;
  36 struct winsys_handle;
  37
  38 enum i915_winsys_buffer_usage
  39 {
  40    /* use on textures */
  41    I915_USAGE_RENDER    = 0x01,
  42    I915_USAGE_SAMPLER   = 0x02,
  43    I915_USAGE_2D_TARGET = 0x04,
  44    I915_USAGE_2D_SOURCE = 0x08,
  45    /* use on vertex */
  46    I915_USAGE_VERTEX    = 0x10
  47 };
  48
  49 enum i915_winsys_buffer_type
  50 {
  51    I915_NEW_TEXTURE,
  52    I915_NEW_SCANOUT, /**< a texture used for scanning out from */
  53    I915_NEW_VERTEX
  54 };
  55
  56 enum i915_winsys_buffer_tile
  57 {
  58    I915_TILE_NONE,
  59    I915_TILE_X,
  60    I915_TILE_Y
  61 };
  62
  63 struct i915_winsys_batchbuffer {
  64
  65    struct i915_winsys *iws;
  66
  67    /**
  68     * Values exported to speed up the writing the batchbuffer,
  69     * instead of having to go trough a accesor function for
  70     * each dword written.
  71     */
  72    /*{@*/
  73    uint8_t *map;
  74    uint8_t *ptr;
  75    size_t size;
  76
  77    size_t relocs;
  78    size_t max_relocs;
  79    /*@}*/
  80 };
  81
  82 struct i915_winsys {
  83
  84    unsigned pci_id; /**< PCI ID for the device */
  85
  86    /**
  87     * Batchbuffer functions.
  88     */
  89    /*@{*/
  90    /**
  91     * Create a new batchbuffer.
  92     */
  93    struct i915_winsys_batchbuffer *
  94       (*batchbuffer_create)(struct i915_winsys *iws);
  95
  96    /**
  97     * Emit a relocation to a buffer.
  98     * Target position in batchbuffer is the same as ptr.
  99     *
 100     * @batch
 101     * @reloc buffer address to be inserted into target.
 102     * @usage how is the hardware going to use the buffer.
 103     * @offset add this to the reloc buffers address
 104     * @target buffer where to write the address, null for batchbuffer.
 105     */
 106    int (*batchbuffer_reloc)(struct i915_winsys_batchbuffer *batch,
 107                             struct i915_winsys_buffer *reloc,
 108                             enum i915_winsys_buffer_usage usage,
 109                             unsigned offset);
 110
 111    /**
 112     * Flush a bufferbatch.
 113     */
 114    void (*batchbuffer_flush)(struct i915_winsys_batchbuffer *batch,
 115                              struct pipe_fence_handle **fence);
 116
 117    /**
 118     * Destroy a batchbuffer.
 119     */
 120    void (*batchbuffer_destroy)(struct i915_winsys_batchbuffer *batch);
 121    /*@}*/
 122
 123
 124    /**
 125     * Buffer functions.
 126     */
 127    /*@{*/
 128    /**
 129     * Create a buffer.
 130     */
 131    struct i915_winsys_buffer *
 132       (*buffer_create)(struct i915_winsys *iws,
 133                        unsigned size, unsigned alignment,
 134                        enum i915_winsys_buffer_type type);
 135
 136    /**
 137     * Creates a buffer from a handle.
 138     * Used to implement pipe_screen::resource_from_handle.
 139     * Also provides the stride information needed for the
 140     * texture via the stride argument.
 141     */
 142    struct i915_winsys_buffer *
 143       (*buffer_from_handle)(struct i915_winsys *iws,
 144                             struct winsys_handle *whandle,
 145                             unsigned *stride);
 146
 147    /**
 148     * Used to implement pipe_screen::resource_get_handle.
 149     * The winsys might need the stride information.
 150     */
 151    boolean (*buffer_get_handle)(struct i915_winsys *iws,
 152                                 struct i915_winsys_buffer *buffer,
 153                                 struct winsys_handle *whandle,
 154                                 unsigned stride);
 155
 156    /**
 157     * Fence a buffer with a fence reg.
 158     * Not to be confused with pipe_fence_handle.
 159     */
 160    int (*buffer_set_fence_reg)(struct i915_winsys *iws,
 161                                struct i915_winsys_buffer *buffer,
 162                                unsigned stride,
 163                                enum i915_winsys_buffer_tile tile);
 164
 165    /**
 166     * Map a buffer.
 167     */
 168    void *(*buffer_map)(struct i915_winsys *iws,
 169                        struct i915_winsys_buffer *buffer,
 170                        boolean write);
 171
 172    /**
 173     * Unmap a buffer.
 174     */
 175    void (*buffer_unmap)(struct i915_winsys *iws,
 176                         struct i915_winsys_buffer *buffer);
 177
 178    /**
 179     * Write to a buffer.
 180     *
 181     * Arguments follows pipe_buffer_write.
 182     */
 183    int (*buffer_write)(struct i915_winsys *iws,
 184                        struct i915_winsys_buffer *dst,
 185                        size_t offset,
 186                        size_t size,
 187                        const void *data);
 188
 189    void (*buffer_destroy)(struct i915_winsys *iws,
 190                           struct i915_winsys_buffer *buffer);
 191    /*@}*/
 192
 193
 194    /**
 195     * Fence functions.
 196     */
 197    /*@{*/
 198    /**
 199     * Reference fence and set ptr to fence.
 200     */
 201    void (*fence_reference)(struct i915_winsys *iws,
 202                            struct pipe_fence_handle **ptr,
 203                            struct pipe_fence_handle *fence);
 204
 205    /**
 206     * Check if a fence has finished.
 207     */
 208    int (*fence_signalled)(struct i915_winsys *iws,
 209                           struct pipe_fence_handle *fence);
 210
 211    /**
 212     * Wait on a fence to finish.
 213     */
 214    int (*fence_finish)(struct i915_winsys *iws,
 215                        struct pipe_fence_handle *fence);
 216    /*@}*/
 217
 218
 219    /**
 220     * Destroy the winsys.
 221     */
 222    void (*destroy)(struct i915_winsys *iws);
 223 };
 224
 225
 226 /**
 227  * Create i915 pipe_screen.
 228  */
 229 struct pipe_screen *i915_screen_create(struct i915_winsys *iws);
 230
 231
 232 #endif