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 drm_api *api, struct pipe_screen *pscreen,
  16                         unsigned handle, enum pipe_format format,
  17                         unsigned width, unsigned height, unsigned pitch)
  18 {
  19         struct pipe_surface *ps = NULL;
  20         struct pipe_texture *pt = NULL;
  21         struct pipe_texture tmpl;
  22
  23         memset(&tmpl, 0, sizeof(tmpl));
  24         tmpl.tex_usage = PIPE_TEXTURE_USAGE_PRIMARY;
  25         tmpl.target = PIPE_TEXTURE_2D;
  26         tmpl.last_level = 0;
  27         tmpl.depth0 = 1;
  28         tmpl.format = format;
  29         tmpl.width0 = width;
  30         tmpl.height0 = height;
  31
  32         pt = api->texture_from_shared_handle(api, pscreen, &tmpl,
  33                                              "front buffer", pitch, handle);
  34         if (!pt)
  35                 return NULL;
  36
  37         ps = pscreen->get_tex_surface(pscreen, pt, 0, 0, 0,
  38                                       PIPE_BUFFER_USAGE_GPU_READ |
  39                                       PIPE_BUFFER_USAGE_GPU_WRITE);
  40
  41         /* we don't need the texture from this point on */
  42         pipe_texture_reference(&pt, NULL);
  43         return ps;
  44 }
  45
  46 static struct pipe_surface *
  47 nouveau_dri1_front_surface(struct pipe_context *pipe)
  48 {
  49         return nouveau_winsys_screen(pipe->screen)->front;
  50 }
  51
  52 static struct dri1_api nouveau_dri1_api = {
  53         nouveau_dri1_front_surface,
  54 };
  55
  56 static struct pipe_screen *
  57 nouveau_drm_create_screen(struct drm_api *api, int fd,
  58                           struct drm_create_screen_arg *arg)
  59 {
  60         struct dri1_create_screen_arg *dri1 = (void *)arg;
  61         struct nouveau_winsys *nvws;
  62         struct pipe_winsys *ws;
  63         struct nouveau_device *dev = NULL;
  64         struct pipe_screen *(*init)(struct pipe_winsys *,
  65                                     struct nouveau_device *);
  66         int ret;
  67
  68         ret = nouveau_device_open_existing(&dev, 0, fd, 0);
  69         if (ret)
  70                 return NULL;
  71
  72         switch (dev->chipset & 0xf0) {
  73         case 0x00:
  74                 init = nv04_screen_create;
  75                 break;
  76         case 0x10:
  77                 init = nv10_screen_create;
  78                 break;
  79         case 0x20:
  80                 init = nv20_screen_create;
  81                 break;
  82         case 0x30:
  83                 init = nv30_screen_create;
  84                 break;
  85         case 0x40:
  86         case 0x60:
  87                 init = nv40_screen_create;
  88                 break;
  89         case 0x80:
  90         case 0x90:
  91         case 0xa0:
  92                 init = nv50_screen_create;
  93                 break;
  94         default:
  95                 debug_printf("%s: unknown chipset nv%02x\n", __func__,
  96                              dev->chipset);
  97                 return NULL;
  98         }
  99
 100         nvws = CALLOC_STRUCT(nouveau_winsys);
 101         if (!nvws) {
 102                 nouveau_device_close(&dev);
 103                 return NULL;
 104         }
 105         ws = &nvws->base;
 106
 107         nvws->pscreen = init(ws, dev);
 108         if (!nvws->pscreen) {
 109                 ws->destroy(ws);
 110                 return NULL;
 111         }
 112
 113         if (arg && arg->mode == DRM_CREATE_DRI1) {
 114                 struct nouveau_dri *nvdri = dri1->ddx_info;
 115                 enum pipe_format format;
 116
 117                 if (nvdri->bpp == 16)
 118                         format = PIPE_FORMAT_R5G6B5_UNORM;
 119                 else
 120                         format = PIPE_FORMAT_A8R8G8B8_UNORM;
 121
 122                 nvws->front = dri_surface_from_handle(api, nvws->pscreen,
 123                                                       nvdri->front_offset,
 124                                                       format, nvdri->width,
 125                                                       nvdri->height,
 126                                                       nvdri->front_pitch *
 127                                                       (nvdri->bpp / 8));
 128                 if (!nvws->front) {
 129                         debug_printf("%s: error referencing front buffer\n",
 130                                      __func__);
 131                         ws->destroy(ws);
 132                         return NULL;
 133                 }
 134
 135                 dri1->api = &nouveau_dri1_api;
 136         }
 137
 138         return nvws->pscreen;
 139 }
 140
 141 static struct pipe_context *
 142 nouveau_drm_create_context(struct drm_api *api, struct pipe_screen *pscreen)
 143 {
 144         struct nouveau_winsys *nvws = nouveau_winsys_screen(pscreen);
 145         struct pipe_context *(*init)(struct pipe_screen *, unsigned);
 146         unsigned chipset = nouveau_screen(pscreen)->device->chipset;
 147         int i;
 148
 149         switch (chipset & 0xf0) {
 150         case 0x00:
 151                 init = nv04_create;
 152                 break;
 153         case 0x10:
 154                 init = nv10_create;
 155                 break;
 156         case 0x20:
 157                 init = nv20_create;
 158                 break;
 159         case 0x30:
 160                 init = nv30_create;
 161                 break;
 162         case 0x40:
 163         case 0x60:
 164                 init = nv40_create;
 165                 break;
 166         case 0x80:
 167         case 0x90:
 168         case 0xa0:
 169                 init = nv50_create;
 170                 break;
 171         default:
 172                 debug_printf("%s: unknown chipset nv%02x\n", __func__, chipset);
 173                 return NULL;
 174         }
 175
 176         /* Find a free slot for a pipe context, allocate a new one if needed */
 177         for (i = 0; i < nvws->nr_pctx; i++) {
 178                 if (nvws->pctx[i] == NULL)
 179                         break;
 180         }
 181
 182         if (i == nvws->nr_pctx) {
 183                 nvws->nr_pctx++;
 184                 nvws->pctx = realloc(nvws->pctx,
 185                                       sizeof(*nvws->pctx) * nvws->nr_pctx);
 186         }
 187
 188         nvws->pctx[i] = init(pscreen, i);
 189         return nvws->pctx[i];
 190 }
 191
 192 static struct pipe_texture *
 193 nouveau_drm_pt_from_name(struct drm_api *api, struct pipe_screen *pscreen,
 194                          struct pipe_texture *templ, const char *name,
 195                          unsigned stride, unsigned handle)
 196 {
 197         struct nouveau_device *dev = nouveau_screen(pscreen)->device;
 198         struct pipe_texture *pt;
 199         struct pipe_buffer *pb;
 200         int ret;
 201
 202         pb = CALLOC(1, sizeof(struct pipe_buffer) + sizeof(struct nouveau_bo*));
 203         if (!pb)
 204                 return NULL;
 205
 206         ret = nouveau_bo_handle_ref(dev, handle, (struct nouveau_bo**)(pb+1));
 207         if (ret) {
 208                 debug_printf("%s: ref name 0x%08x failed with %d\n",
 209                              __func__, handle, ret);
 210                 FREE(pb);
 211                 return NULL;
 212         }
 213
 214         pipe_reference_init(&pb->reference, 1);
 215         pb->screen = pscreen;
 216         pb->alignment = 0;
 217         pb->usage = PIPE_BUFFER_USAGE_GPU_READ_WRITE |
 218                     PIPE_BUFFER_USAGE_CPU_READ_WRITE;
 219         pb->size = nouveau_bo(pb)->size;
 220         pt = pscreen->texture_blanket(pscreen, templ, &stride, pb);
 221         pipe_buffer_reference(&pb, NULL);
 222         return pt;
 223 }
 224
 225 static boolean
 226 nouveau_drm_name_from_pt(struct drm_api *api, struct pipe_screen *pscreen,
 227                          struct pipe_texture *pt, unsigned *stride,
 228                          unsigned *handle)
 229 {
 230         struct nouveau_miptree *mt = nouveau_miptree(pt);
 231
 232         if (!mt || !mt->bo)
 233                 return false;
 234
 235         return nouveau_bo_handle_get(mt->bo, handle) == 0;
 236 }
 237
 238 static boolean
 239 nouveau_drm_handle_from_pt(struct drm_api *api, struct pipe_screen *pscreen,
 240                            struct pipe_texture *pt, unsigned *stride,
 241                            unsigned *handle)
 242 {
 243         struct nouveau_miptree *mt = nouveau_miptree(pt);
 244
 245         if (!mt || !mt->bo)
 246                 return false;
 247
 248         *handle = mt->bo->handle;
 249         *stride = pf_get_stride(mt->base.format, mt->base.width0);
 250         return true;
 251 }
 252
 253 struct drm_api drm_api_hooks = {
 254         .create_screen = nouveau_drm_create_screen,
 255         .create_context = nouveau_drm_create_context,
 256         .texture_from_shared_handle = nouveau_drm_pt_from_name,
 257         .shared_handle_from_texture = nouveau_drm_name_from_pt,
 258         .local_handle_from_texture = nouveau_drm_handle_from_pt,
 259 };
 260
 261 struct drm_api *
 262 drm_api_create() {
 263         return &drm_api_hooks;
 264 }
 265