src/gallium/winsys/drm/nouveau/drm/nouveau_drm_api.c

   1 #include "pipe/p_context.h"
   2 #include "pipe/p_state.h"
   3 #include "util/u_memory.h"
   4
   5 #include "nouveau_drm_api.h"
   6
   7 #include "nouveau_drmif.h"
   8 #include "nouveau_channel.h"
   9 #include "nouveau_bo.h"
  10
  11 #include "nouveau/nouveau_winsys.h"
  12 #include "nouveau/nouveau_screen.h"
  13
  14 static struct pipe_surface *
  15 dri_surface_from_handle(struct pipe_screen *screen,
  16                         unsigned handle,
  17                         enum pipe_format format,
  18                         unsigned width,
  19                         unsigned height,
  20                         unsigned pitch)
  21 {
  22    struct pipe_surface *surface = NULL;
  23    struct pipe_texture *texture = NULL;
  24    struct pipe_texture templat;
  25    struct pipe_buffer *buf = NULL;
  26
  27    buf = drm_api_hooks.buffer_from_handle(screen, "front buffer", handle);
  28    if (!buf)
  29       return NULL;
  30
  31    memset(&templat, 0, sizeof(templat));
  32    templat.tex_usage = PIPE_TEXTURE_USAGE_PRIMARY |
  33                        NOUVEAU_TEXTURE_USAGE_LINEAR;
  34    templat.target = PIPE_TEXTURE_2D;
  35    templat.last_level = 0;
  36    templat.depth[0] = 1;
  37    templat.format = format;
  38    templat.width[0] = width;
  39    templat.height[0] = height;
  40    pf_get_block(templat.format, &templat.block);
  41
  42    texture = screen->texture_blanket(screen,
  43                                      &templat,
  44                                      &pitch,
  45                                      buf);
  46
  47    /* we don't need the buffer from this point on */
  48    pipe_buffer_reference(&buf, NULL);
  49
  50    if (!texture)
  51       return NULL;
  52
  53    surface = screen->get_tex_surface(screen, texture, 0, 0, 0,
  54                                      PIPE_BUFFER_USAGE_GPU_READ |
  55                                      PIPE_BUFFER_USAGE_GPU_WRITE);
  56
  57    /* we don't need the texture from this point on */
  58    pipe_texture_reference(&texture, NULL);
  59    return surface;
  60 }
  61
  62 static struct pipe_surface *
  63 nouveau_dri1_front_surface(struct pipe_context *pipe)
  64 {
  65         return nouveau_winsys_screen(pipe->screen)->front;
  66 }
  67
  68 static struct dri1_api nouveau_dri1_api = {
  69         nouveau_dri1_front_surface,
  70 };
  71
  72 static struct pipe_screen *
  73 nouveau_drm_create_screen(int fd, struct drm_create_screen_arg *arg)
  74 {
  75         struct dri1_create_screen_arg *dri1 = (void *)arg;
  76         struct nouveau_winsys *nvws;
  77         struct pipe_winsys *ws;
  78         struct nouveau_device *dev = NULL;
  79         struct pipe_screen *(*init)(struct pipe_winsys *,
  80                                     struct nouveau_device *);
  81         int ret;
  82
  83         ret = nouveau_device_open_existing(&dev, 0, fd, 0);
  84         if (ret)
  85                 return NULL;
  86
  87         switch (dev->chipset & 0xf0) {
  88         case 0x00:
  89                 init = nv04_screen_create;
  90                 break;
  91         case 0x10:
  92                 init = nv10_screen_create;
  93                 break;
  94         case 0x20:
  95                 init = nv20_screen_create;
  96                 break;
  97         case 0x30:
  98                 init = nv30_screen_create;
  99                 break;
 100         case 0x40:
 101         case 0x60:
 102                 init = nv40_screen_create;
 103                 break;
 104         case 0x80:
 105         case 0x90:
 106         case 0xa0:
 107                 init = nv50_screen_create;
 108                 break;
 109         default:
 110                 debug_printf("%s: unknown chipset nv%02x\n", __func__,
 111                              dev->chipset);
 112                 return NULL;
 113         }
 114
 115         nvws = CALLOC_STRUCT(nouveau_winsys);
 116         if (!nvws) {
 117                 nouveau_device_close(&dev);
 118                 return NULL;
 119         }
 120         ws = &nvws->base;
 121
 122         nvws->pscreen = init(ws, dev);
 123         if (!nvws->pscreen) {
 124                 ws->destroy(ws);
 125                 return NULL;
 126         }
 127
 128         if (arg->mode == DRM_CREATE_DRI1) {
 129                 struct nouveau_dri *nvdri = dri1->ddx_info;
 130                 enum pipe_format format;
 131
 132                 if (nvdri->bpp == 16)
 133                         format = PIPE_FORMAT_R5G6B5_UNORM;
 134                 else
 135                         format = PIPE_FORMAT_A8R8G8B8_UNORM;
 136
 137                 nvws->front = dri_surface_from_handle(nvws->pscreen,
 138                                                        nvdri->front_offset,
 139                                                        format,
 140                                                        nvdri->width,
 141                                                        nvdri->height,
 142                                                        nvdri->front_pitch *
 143                                                        (nvdri->bpp / 8));
 144                 if (!nvws->front) {
 145                         debug_printf("%s: error referencing front buffer\n",
 146                                      __func__);
 147                         ws->destroy(ws);
 148                         return NULL;
 149                 }
 150
 151                 dri1->api = &nouveau_dri1_api;
 152         }
 153
 154         return nvws->pscreen;
 155 }
 156
 157 static struct pipe_context *
 158 nouveau_drm_create_context(struct pipe_screen *pscreen)
 159 {
 160         struct nouveau_winsys *nvws = nouveau_winsys_screen(pscreen);
 161         struct pipe_context *(*init)(struct pipe_screen *, unsigned);
 162         unsigned chipset = nouveau_screen(pscreen)->device->chipset;
 163         int i;
 164
 165         switch (chipset & 0xf0) {
 166         case 0x00:
 167                 init = nv04_create;
 168                 break;
 169         case 0x10:
 170                 init = nv10_create;
 171                 break;
 172         case 0x20:
 173                 init = nv20_create;
 174                 break;
 175         case 0x30:
 176                 init = nv30_create;
 177                 break;
 178         case 0x40:
 179         case 0x60:
 180                 init = nv40_create;
 181                 break;
 182         case 0x80:
 183         case 0x90:
 184         case 0xa0:
 185                 init = nv50_create;
 186                 break;
 187         default:
 188                 debug_printf("%s: unknown chipset nv%02x\n", __func__, chipset);
 189                 return NULL;
 190         }
 191
 192         /* Find a free slot for a pipe context, allocate a new one if needed */
 193         for (i = 0; i < nvws->nr_pctx; i++) {
 194                 if (nvws->pctx[i] == NULL)
 195                         break;
 196         }
 197
 198         if (i == nvws->nr_pctx) {
 199                 nvws->nr_pctx++;
 200                 nvws->pctx = realloc(nvws->pctx,
 201                                       sizeof(*nvws->pctx) * nvws->nr_pctx);
 202         }
 203
 204         nvws->pctx[i] = init(pscreen, i);
 205         return nvws->pctx[i];
 206 }
 207
 208 static boolean
 209 nouveau_drm_pb_from_pt(struct pipe_texture *pt, struct pipe_buffer **ppb,
 210                        unsigned *stride)
 211 {
 212         return false;
 213 }
 214
 215 static struct pipe_buffer *
 216 nouveau_drm_pb_from_handle(struct pipe_screen *pscreen, const char *name,
 217                            unsigned handle)
 218 {
 219         struct nouveau_device *dev = nouveau_screen(pscreen)->device;
 220         struct pipe_buffer *pb;
 221         int ret;
 222
 223         pb = CALLOC(1, sizeof(struct pipe_buffer) + sizeof(struct nouveau_bo*));
 224         if (!pb)
 225                 return NULL;
 226
 227         ret = nouveau_bo_handle_ref(dev, handle, (struct nouveau_bo**)(pb+1));
 228         if (ret) {
 229                 debug_printf("%s: ref name 0x%08x failed with %d\n",
 230                              __func__, handle, ret);
 231                 FREE(pb);
 232                 return NULL;
 233         }
 234
 235         pipe_reference_init(&pb->reference, 1);
 236         pb->screen = pscreen;
 237         pb->alignment = 0;
 238         pb->usage = PIPE_BUFFER_USAGE_GPU_READ_WRITE |
 239                     PIPE_BUFFER_USAGE_CPU_READ_WRITE;
 240         pb->size = nouveau_bo(pb)->size;
 241         return pb;
 242 }
 243
 244 static boolean
 245 nouveau_drm_handle_from_pb(struct pipe_screen *pscreen, struct pipe_buffer *pb,
 246                            unsigned *handle)
 247 {
 248         struct nouveau_bo *bo = nouveau_bo(pb);
 249
 250         if (!bo)
 251                 return FALSE;
 252
 253         *handle = bo->handle;
 254         return TRUE;
 255 }
 256
 257 static boolean
 258 nouveau_drm_name_from_pb(struct pipe_screen *pscreen, struct pipe_buffer *pb,
 259                          unsigned *handle)
 260 {
 261         struct nouveau_bo *bo = nouveau_bo(pb);
 262
 263         if (!bo)
 264                 return FALSE;
 265
 266         return nouveau_bo_handle_get(bo, handle) == 0;
 267 }
 268
 269 struct drm_api drm_api_hooks = {
 270         .create_screen = nouveau_drm_create_screen,
 271         .create_context = nouveau_drm_create_context,
 272         .buffer_from_texture = nouveau_drm_pb_from_pt,
 273         .buffer_from_handle = nouveau_drm_pb_from_handle,
 274         .handle_from_buffer = nouveau_drm_handle_from_pb,
 275         .global_handle_from_buffer = nouveau_drm_name_from_pb,
 276 };
 277