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