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 /* These need to be in sync with the definitions of libdrm-intel! */
  57 enum i915_winsys_buffer_tile
  58 {
  59    I915_TILE_NONE,
  60    I915_TILE_X,
  61    I915_TILE_Y
  62 };
  63
  64 struct i915_winsys_batchbuffer {
  65
  66    struct i915_winsys *iws;
  67
  68    /**
  69     * Values exported to speed up the writing the batchbuffer,
  70     * instead of having to go trough a accesor function for
  71     * each dword written.
  72     */
  73    /*{@*/
  74    uint8_t *map;
  75    uint8_t *ptr;
  76    size_t size;
  77
  78    size_t 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     * Validate buffers for usage in this batchbuffer.
  98     * Does space-checking and asorted other book-keeping.
  99     *
 100     * @batch
 101     * @buffers array to buffers to validate
 102     * @num_of_buffers size of the passed array
 103     */
 104    boolean (*validate_buffers)(struct i915_winsys_batchbuffer *batch,
 105                                struct i915_winsys_buffer **buffers,
 106                                int num_of_buffers);
 107
 108    /**
 109     * Emit a relocation to a buffer.
 110     * Target position in batchbuffer is the same as ptr.
 111     *
 112     * @batch
 113     * @reloc buffer address to be inserted into target.
 114     * @usage how is the hardware going to use the buffer.
 115     * @offset add this to the reloc buffers address
 116     * @target buffer where to write the address, null for batchbuffer.
 117     * @fenced relocation needs a fence.
 118     */
 119    int (*batchbuffer_reloc)(struct i915_winsys_batchbuffer *batch,
 120                             struct i915_winsys_buffer *reloc,
 121                             enum i915_winsys_buffer_usage usage,
 122                             unsigned offset, boolean fenced);
 123
 124    /**
 125     * Flush a bufferbatch.
 126     */
 127    void (*batchbuffer_flush)(struct i915_winsys_batchbuffer *batch,
 128                              struct pipe_fence_handle **fence);
 129
 130    /**
 131     * Destroy a batchbuffer.
 132     */
 133    void (*batchbuffer_destroy)(struct i915_winsys_batchbuffer *batch);
 134    /*@}*/
 135
 136
 137    /**
 138     * Buffer functions.
 139     */
 140    /*@{*/
 141    /**
 142     * Create a buffer.
 143     */
 144    struct i915_winsys_buffer *
 145       (*buffer_create)(struct i915_winsys *iws,
 146                        unsigned size,
 147                        enum i915_winsys_buffer_type type);
 148
 149    /**
 150     * Create a tiled buffer.
 151     *
 152     * *stride, height are in bytes. The winsys tries to allocate the buffer with
 153     * the tiling mode provide in *tiling. If tiling is no possible, *tiling will
 154     * be set to I915_TILE_NONE. The calculated stride (incorporateing hw/kernel
 155     * requirements) is always returned in *stride.
 156     */
 157    struct i915_winsys_buffer *
 158       (*buffer_create_tiled)(struct i915_winsys *iws,
 159                              unsigned *stride, unsigned height,
 160                              enum i915_winsys_buffer_tile *tiling,
 161                              enum i915_winsys_buffer_type type);
 162
 163    /**
 164     * Creates a buffer from a handle.
 165     * Used to implement pipe_screen::resource_from_handle.
 166     * Also provides the stride information needed for the
 167     * texture via the stride argument.
 168     */
 169    struct i915_winsys_buffer *
 170       (*buffer_from_handle)(struct i915_winsys *iws,
 171                             struct winsys_handle *whandle,
 172                             enum i915_winsys_buffer_tile *tiling,
 173                             unsigned *stride);
 174
 175    /**
 176     * Used to implement pipe_screen::resource_get_handle.
 177     * The winsys might need the stride information.
 178     */
 179    boolean (*buffer_get_handle)(struct i915_winsys *iws,
 180                                 struct i915_winsys_buffer *buffer,
 181                                 struct winsys_handle *whandle,
 182                                 unsigned stride);
 183
 184    /**
 185     * Map a buffer.
 186     */
 187    void *(*buffer_map)(struct i915_winsys *iws,
 188                        struct i915_winsys_buffer *buffer,
 189                        boolean write);
 190
 191    /**
 192     * Unmap a buffer.
 193     */
 194    void (*buffer_unmap)(struct i915_winsys *iws,
 195                         struct i915_winsys_buffer *buffer);
 196
 197    /**
 198     * Write to a buffer.
 199     *
 200     * Arguments follows pipe_buffer_write.
 201     */
 202    int (*buffer_write)(struct i915_winsys *iws,
 203                        struct i915_winsys_buffer *dst,
 204                        size_t offset,
 205                        size_t size,
 206                        const void *data);
 207
 208    void (*buffer_destroy)(struct i915_winsys *iws,
 209                           struct i915_winsys_buffer *buffer);
 210
 211    /**
 212     * Check if a buffer is busy.
 213     */
 214    boolean (*buffer_is_busy)(struct i915_winsys *iws,
 215                              struct i915_winsys_buffer *buffer);
 216    /*@}*/
 217
 218
 219    /**
 220     * Fence functions.
 221     */
 222    /*@{*/
 223    /**
 224     * Reference fence and set ptr to fence.
 225     */
 226    void (*fence_reference)(struct i915_winsys *iws,
 227                            struct pipe_fence_handle **ptr,
 228                            struct pipe_fence_handle *fence);
 229
 230    /**
 231     * Check if a fence has finished.
 232     */
 233    int (*fence_signalled)(struct i915_winsys *iws,
 234                           struct pipe_fence_handle *fence);
 235
 236    /**
 237     * Wait on a fence to finish.
 238     */
 239    int (*fence_finish)(struct i915_winsys *iws,
 240                        struct pipe_fence_handle *fence);
 241    /*@}*/
 242
 243
 244    /**
 245     * Destroy the winsys.
 246     */
 247    void (*destroy)(struct i915_winsys *iws);
 248 };
 249
 250 #endif