src/gallium/drivers/i965/brw_resource_buffer.c

   1
   2 #include "util/u_memory.h"
   3 #include "util/u_math.h"
   4
   5 #include "pipe/p_state.h"
   6 #include "pipe/p_defines.h"
   7 #include "util/u_inlines.h"
   8
   9 #include "brw_resource.h"
  10 #include "brw_context.h"
  11 #include "brw_batchbuffer.h"
  12 #include "brw_winsys.h"
  13
  14 static boolean
  15 brw_buffer_get_handle(struct pipe_screen *screen,
  16                       struct pipe_resource *resource,
  17                       struct winsys_handle *handle)
  18 {
  19    return FALSE;
  20 }
  21
  22
  23 static void
  24 brw_buffer_destroy(struct pipe_screen *screen,
  25                     struct pipe_resource *resource)
  26 {
  27    struct brw_buffer *buf = brw_buffer( resource );
  28
  29    bo_reference(&buf->bo, NULL);
  30    FREE(buf);
  31 }
  32
  33
  34 static void *
  35 brw_buffer_transfer_map( struct pipe_context *pipe,
  36                          struct pipe_transfer *transfer)
  37 {
  38    struct brw_screen *bscreen = brw_screen(pipe->screen);
  39    struct brw_winsys_screen *sws = bscreen->sws;
  40    struct brw_buffer *buf = brw_buffer(transfer->resource);
  41    unsigned offset = transfer->box.x;
  42    unsigned length = transfer->box.width;
  43    unsigned usage = transfer->usage;
  44    uint8_t *map;
  45
  46    if (buf->user_buffer)
  47       map = buf->user_buffer;
  48    else
  49       map = sws->bo_map( buf->bo,
  50                          BRW_DATA_OTHER,
  51                          offset,
  52                          length,
  53                          (usage & PIPE_TRANSFER_WRITE) ? TRUE : FALSE,
  54                          (usage & PIPE_TRANSFER_DISCARD) ? TRUE : FALSE,
  55                          (usage & PIPE_TRANSFER_FLUSH_EXPLICIT) ? TRUE : FALSE);
  56
  57    return map + offset;
  58 }
  59
  60
  61 static void
  62 brw_buffer_transfer_flush_region( struct pipe_context *pipe,
  63                                   struct pipe_transfer *transfer,
  64                                   const struct pipe_box *box)
  65 {
  66    struct brw_screen *bscreen = brw_screen(pipe->screen);
  67    struct brw_winsys_screen *sws = bscreen->sws;
  68    struct brw_buffer *buf = brw_buffer(transfer->resource);
  69    unsigned offset = box->x;
  70    unsigned length = box->width;
  71
  72    if (buf->user_buffer)
  73       return;
  74
  75    sws->bo_flush_range( buf->bo,
  76                         offset,
  77                         length );
  78 }
  79
  80
  81 static void
  82 brw_buffer_transfer_unmap( struct pipe_context *pipe,
  83                            struct pipe_transfer *transfer)
  84 {
  85    struct brw_screen *bscreen = brw_screen(pipe->screen);
  86    struct brw_winsys_screen *sws = bscreen->sws;
  87    struct brw_buffer *buf = brw_buffer( transfer->resource );
  88
  89    if (buf->bo)
  90       sws->bo_unmap(buf->bo);
  91 }
  92
  93
  94 struct u_resource_vtbl brw_buffer_vtbl =
  95 {
  96    brw_buffer_get_handle,            /* get_handle */
  97    brw_buffer_destroy,               /* resource_destroy */
  98    u_default_get_transfer,           /* get_transfer */
  99    u_default_transfer_destroy,       /* transfer_destroy */
 100    brw_buffer_transfer_map,          /* transfer_map */
 101    brw_buffer_transfer_flush_region,  /* transfer_flush_region */
 102    brw_buffer_transfer_unmap,        /* transfer_unmap */
 103    u_default_transfer_inline_write   /* transfer_inline_write */
 104 };
 105
 106
 107 struct pipe_resource *
 108 brw_buffer_create(struct pipe_screen *screen,
 109                   const struct pipe_resource *template)
 110 {
 111    struct brw_screen *bscreen = brw_screen(screen);
 112    struct brw_winsys_screen *sws = bscreen->sws;
 113    struct brw_buffer *buf;
 114    unsigned buffer_type;
 115    enum pipe_error ret;
 116
 117    buf = CALLOC_STRUCT(brw_buffer);
 118    if (!buf)
 119       return NULL;
 120
 121    buf->b.b = *template;
 122    buf->b.vtbl = &brw_buffer_vtbl;
 123    pipe_reference_init(&buf->b.b.reference, 1);
 124    buf->b.b.screen = screen;
 125
 126    switch (template->bind & (PIPE_BIND_VERTEX_BUFFER |
 127                               PIPE_BIND_INDEX_BUFFER |
 128                               PIPE_BIND_CONSTANT_BUFFER))
 129    {
 130    case PIPE_BIND_VERTEX_BUFFER:
 131    case PIPE_BIND_INDEX_BUFFER:
 132    case (PIPE_BIND_VERTEX_BUFFER|PIPE_BIND_INDEX_BUFFER):
 133       buffer_type = BRW_BUFFER_TYPE_VERTEX;
 134       break;
 135
 136    case PIPE_BIND_CONSTANT_BUFFER:
 137       buffer_type = BRW_BUFFER_TYPE_SHADER_CONSTANTS;
 138       break;
 139
 140    default:
 141       buffer_type = BRW_BUFFER_TYPE_GENERIC;
 142       break;
 143    }
 144
 145    ret = sws->bo_alloc( sws, buffer_type,
 146                         template->width0,
 147                         64,     /* alignment */
 148                         &buf->bo );
 149    if (ret != PIPE_OK)
 150       return NULL;
 151
 152    return &buf->b.b;
 153 }
 154
 155
 156 struct pipe_resource *
 157 brw_user_buffer_create(struct pipe_screen *screen,
 158                        void *ptr,
 159                        unsigned bytes,
 160                        unsigned bind)
 161 {
 162    struct brw_buffer *buf;
 163
 164    buf = CALLOC_STRUCT(brw_buffer);
 165    if (!buf)
 166       return NULL;
 167
 168    pipe_reference_init(&buf->b.b.reference, 1);
 169    buf->b.vtbl = &brw_buffer_vtbl;
 170    buf->b.b.screen = screen;
 171    buf->b.b.format = PIPE_FORMAT_R8_UNORM; /* ?? */
 172    buf->b.b.usage = PIPE_USAGE_IMMUTABLE;
 173    buf->b.b.bind = bind;
 174    buf->b.b.width0 = bytes;
 175    buf->b.b.height0 = 1;
 176    buf->b.b.depth0 = 1;
 177    buf->b.b.array_size = 1;
 178
 179    buf->user_buffer = ptr;
 180
 181    return &buf->b.b;
 182 }