src/gallium/drivers/nvfx/nvfx_buffer.c

   1
   2 #include "util/u_inlines.h"
   3 #include "util/u_memory.h"
   4 #include "util/u_math.h"
   5
   6 #include "nouveau/nouveau_screen.h"
   7 #include "nouveau/nouveau_winsys.h"
   8 #include "nvfx_resource.h"
   9
  10
  11 /* Currently using separate implementations for buffers and textures,
  12  * even though gallium has a unified abstraction of these objects.
  13  * Eventually these should be combined, and mechanisms like transfers
  14  * be adapted to work for both buffer and texture uploads.
  15  */
  16 static void nvfx_buffer_destroy(struct pipe_screen *pscreen,
  17                                 struct pipe_resource *presource)
  18 {
  19         struct nvfx_resource *buffer = nvfx_resource(presource);
  20
  21         nouveau_screen_bo_release(pscreen, buffer->bo);
  22         FREE(buffer);
  23 }
  24
  25
  26
  27
  28 /* Utility functions for transfer create/destroy are hooked in and
  29  * just record the arguments to those functions.
  30  */
  31 static void *
  32 nvfx_buffer_transfer_map( struct pipe_context *pipe,
  33                           struct pipe_transfer *transfer )
  34 {
  35         struct nvfx_resource *buffer = nvfx_resource(transfer->resource);
  36         uint8_t *map;
  37
  38         map = nouveau_screen_bo_map_range( pipe->screen,
  39                                            buffer->bo,
  40                                            transfer->box.x,
  41                                            transfer->box.width,
  42                                            nouveau_screen_transfer_flags(transfer->usage) );
  43         if (map == NULL)
  44                 return NULL;
  45
  46         return map + transfer->box.x;
  47 }
  48
  49
  50
  51 static void nvfx_buffer_transfer_flush_region( struct pipe_context *pipe,
  52                                                struct pipe_transfer *transfer,
  53                                                const struct pipe_box *box)
  54 {
  55         struct nvfx_resource *buffer = nvfx_resource(transfer->resource);
  56
  57         nouveau_screen_bo_map_flush_range(pipe->screen,
  58                                           buffer->bo,
  59                                           transfer->box.x + box->x,
  60                                           box->width);
  61 }
  62
  63 static void nvfx_buffer_transfer_unmap( struct pipe_context *pipe,
  64                                         struct pipe_transfer *transfer )
  65 {
  66         struct nvfx_resource *buffer = nvfx_resource(transfer->resource);
  67
  68         nouveau_screen_bo_unmap(pipe->screen, buffer->bo);
  69 }
  70
  71
  72
  73
  74 struct u_resource_vtbl nvfx_buffer_vtbl =
  75 {
  76         u_default_resource_get_handle,      /* get_handle */
  77         nvfx_buffer_destroy,                 /* resource_destroy */
  78         NULL,                       /* is_resource_referenced */
  79         u_default_get_transfer,      /* get_transfer */
  80         u_default_transfer_destroy,          /* transfer_destroy */
  81         nvfx_buffer_transfer_map,            /* transfer_map */
  82         nvfx_buffer_transfer_flush_region,  /* transfer_flush_region */
  83         nvfx_buffer_transfer_unmap,          /* transfer_unmap */
  84         u_default_transfer_inline_write   /* transfer_inline_write */
  85 };
  86
  87
  88
  89 struct pipe_resource *
  90 nvfx_buffer_create(struct pipe_screen *pscreen,
  91                    const struct pipe_resource *template)
  92 {
  93         struct nvfx_resource *buffer;
  94
  95         buffer = CALLOC_STRUCT(nvfx_resource);
  96         if (!buffer)
  97                 return NULL;
  98
  99         buffer->base = *template;
 100         buffer->vtbl = &nvfx_buffer_vtbl;
 101         pipe_reference_init(&buffer->base.reference, 1);
 102         buffer->base.screen = pscreen;
 103
 104         buffer->bo = nouveau_screen_bo_new(pscreen,
 105                                            16,
 106                                            buffer->base._usage,
 107                                            buffer->base.bind,
 108                                            buffer->base.width0);
 109
 110         if (buffer->bo == NULL)
 111                 goto fail;
 112
 113         return &buffer->base;
 114
 115 fail:
 116         FREE(buffer);
 117         return NULL;
 118 }
 119
 120
 121 struct pipe_resource *
 122 nvfx_user_buffer_create(struct pipe_screen *pscreen,
 123                         void *ptr,
 124                         unsigned bytes,
 125                         unsigned usage)
 126 {
 127         struct nvfx_resource *buffer;
 128
 129         buffer = CALLOC_STRUCT(nvfx_resource);
 130         if (!buffer)
 131                 return NULL;
 132
 133         pipe_reference_init(&buffer->base.reference, 1);
 134         buffer->vtbl = &nvfx_buffer_vtbl;
 135         buffer->base.screen = pscreen;
 136         buffer->base.format = PIPE_FORMAT_R8_UNORM;
 137         buffer->base._usage = PIPE_USAGE_IMMUTABLE;
 138         buffer->base.bind = usage;
 139         buffer->base.width0 = bytes;
 140         buffer->base.height0 = 1;
 141         buffer->base.depth0 = 1;
 142
 143         buffer->bo = nouveau_screen_bo_user(pscreen, ptr, bytes);
 144         if (!buffer->bo)
 145                 goto fail;
 146
 147         return &buffer->base;
 148
 149 fail:
 150         FREE(buffer);
 151         return NULL;
 152 }
 153