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_format.h"
   4 #include "util/u_memory.h"
   5
   6 #include "nouveau_drm_api.h"
   7
   8 #include "nouveau_drmif.h"
   9 #include "nouveau_channel.h"
  10 #include "nouveau_bo.h"
  11
  12 #include "nouveau/nouveau_winsys.h"
  13 #include "nouveau/nouveau_screen.h"
  14
  15 static struct pipe_surface *
  16 dri_surface_from_handle(struct drm_api *api, struct pipe_screen *pscreen,
  17                         unsigned handle, enum pipe_format format,
  18                         unsigned width, unsigned height, unsigned pitch)
  19 {
  20         struct pipe_surface *ps = NULL;
  21         struct pipe_texture *pt = NULL;
  22         struct pipe_texture tmpl;
  23
  24         memset(&tmpl, 0, sizeof(tmpl));
  25         tmpl.tex_usage = PIPE_TEXTURE_USAGE_PRIMARY;
  26         tmpl.target = PIPE_TEXTURE_2D;
  27         tmpl.last_level = 0;
  28         tmpl.depth0 = 1;
  29         tmpl.format = format;
  30         tmpl.width0 = width;
  31         tmpl.height0 = height;
  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 void
  58 nouveau_drm_destroy_winsys(struct pipe_winsys *s)
  59 {
  60         struct nouveau_winsys *nv_winsys = nouveau_winsys(s);
  61         struct nouveau_screen *nv_screen= nouveau_screen(nv_winsys->pscreen);
  62         nouveau_device_close(&nv_screen->device);
  63         FREE(nv_winsys->pctx);
  64         FREE(nv_winsys);
  65 }
  66
  67 static struct pipe_screen *
  68 nouveau_drm_create_screen(struct drm_api *api, int fd,
  69                           struct drm_create_screen_arg *arg)
  70 {
  71         struct dri1_create_screen_arg *dri1 = (void *)arg;
  72         struct nouveau_winsys *nvws;
  73         struct pipe_winsys *ws;
  74         struct nouveau_device *dev = NULL;
  75         struct pipe_screen *(*init)(struct pipe_winsys *,
  76                                     struct nouveau_device *);
  77         int ret;
  78
  79         ret = nouveau_device_open_existing(&dev, 0, fd, 0);
  80         if (ret)
  81                 return NULL;
  82
  83         switch (dev->chipset & 0xf0) {
  84         case 0x30:
  85                 init = nv30_screen_create;
  86                 break;
  87         case 0x40:
  88         case 0x60:
  89                 init = nv40_screen_create;
  90                 break;
  91         case 0x50:
  92         case 0x80:
  93         case 0x90:
  94         case 0xa0:
  95                 init = nv50_screen_create;
  96                 break;
  97         default:
  98                 debug_printf("%s: unknown chipset nv%02x\n", __func__,
  99                              dev->chipset);
 100                 return NULL;
 101         }
 102
 103         nvws = CALLOC_STRUCT(nouveau_winsys);
 104         if (!nvws) {
 105                 nouveau_device_close(&dev);
 106                 return NULL;
 107         }
 108         ws = &nvws->base;
 109         ws->destroy = nouveau_drm_destroy_winsys;
 110
 111         nvws->pscreen = init(ws, dev);
 112         if (!nvws->pscreen) {
 113                 ws->destroy(ws);
 114                 return NULL;
 115         }
 116
 117         if (arg && arg->mode == DRM_CREATE_DRI1) {
 118                 struct nouveau_dri *nvdri = dri1->ddx_info;
 119                 enum pipe_format format;
 120
 121                 if (nvdri->bpp == 16)
 122                         format = PIPE_FORMAT_R5G6B5_UNORM;
 123                 else
 124                         format = PIPE_FORMAT_A8R8G8B8_UNORM;
 125
 126                 nvws->front = dri_surface_from_handle(api, nvws->pscreen,
 127                                                       nvdri->front_offset,
 128                                                       format, nvdri->width,
 129                                                       nvdri->height,
 130                                                       nvdri->front_pitch *
 131                                                       (nvdri->bpp / 8));
 132                 if (!nvws->front) {
 133                         debug_printf("%s: error referencing front buffer\n",
 134                                      __func__);
 135                         ws->destroy(ws);
 136                         return NULL;
 137                 }
 138
 139                 dri1->api = &nouveau_dri1_api;
 140         }
 141
 142         return nvws->pscreen;
 143 }
 144
 145 static struct pipe_context *
 146 nouveau_drm_create_context(struct drm_api *api, struct pipe_screen *pscreen)
 147 {
 148         struct nouveau_winsys *nvws = nouveau_winsys_screen(pscreen);
 149         struct pipe_context *(*init)(struct pipe_screen *, unsigned);
 150         unsigned chipset = nouveau_screen(pscreen)->device->chipset;
 151         int i;
 152
 153         switch (chipset & 0xf0) {
 154         case 0x30:
 155                 init = nv30_create;
 156                 break;
 157         case 0x40:
 158         case 0x60:
 159                 init = nv40_create;
 160                 break;
 161         case 0x50:
 162         case 0x80:
 163         case 0x90:
 164         case 0xa0:
 165                 init = nv50_create;
 166                 break;
 167         default:
 168                 debug_printf("%s: unknown chipset nv%02x\n", __func__, chipset);
 169                 return NULL;
 170         }
 171
 172         /* Find a free slot for a pipe context, allocate a new one if needed */
 173         for (i = 0; i < nvws->nr_pctx; i++) {
 174                 if (nvws->pctx[i] == NULL)
 175                         break;
 176         }
 177
 178         if (i == nvws->nr_pctx) {
 179                 nvws->nr_pctx++;
 180                 nvws->pctx = realloc(nvws->pctx,
 181                                       sizeof(*nvws->pctx) * nvws->nr_pctx);
 182         }
 183
 184         nvws->pctx[i] = init(pscreen, i);
 185         return nvws->pctx[i];
 186 }
 187
 188 static struct pipe_texture *
 189 nouveau_drm_pt_from_name(struct drm_api *api, struct pipe_screen *pscreen,
 190                          struct pipe_texture *templ, const char *name,
 191                          unsigned stride, unsigned handle)
 192 {
 193         struct nouveau_device *dev = nouveau_screen(pscreen)->device;
 194         struct pipe_texture *pt;
 195         struct pipe_buffer *pb;
 196         int ret;
 197
 198         pb = CALLOC(1, sizeof(struct pipe_buffer) + sizeof(struct nouveau_bo*));
 199         if (!pb)
 200                 return NULL;
 201
 202         ret = nouveau_bo_handle_ref(dev, handle, (struct nouveau_bo**)(pb+1));
 203         if (ret) {
 204                 debug_printf("%s: ref name 0x%08x failed with %d\n",
 205                              __func__, handle, ret);
 206                 FREE(pb);
 207                 return NULL;
 208         }
 209
 210         pipe_reference_init(&pb->reference, 1);
 211         pb->screen = pscreen;
 212         pb->alignment = 0;
 213         pb->usage = PIPE_BUFFER_USAGE_GPU_READ_WRITE |
 214                     PIPE_BUFFER_USAGE_CPU_READ_WRITE;
 215         pb->size = nouveau_bo(pb)->size;
 216         pt = pscreen->texture_blanket(pscreen, templ, &stride, pb);
 217         pipe_buffer_reference(&pb, NULL);
 218         return pt;
 219 }
 220
 221 static boolean
 222 nouveau_drm_name_from_pt(struct drm_api *api, struct pipe_screen *pscreen,
 223                          struct pipe_texture *pt, unsigned *stride,
 224                          unsigned *handle)
 225 {
 226         struct nouveau_miptree *mt = nouveau_miptree(pt);
 227
 228         if (!mt || !mt->bo)
 229                 return false;
 230
 231         return nouveau_bo_handle_get(mt->bo, handle) == 0;
 232 }
 233
 234 static boolean
 235 nouveau_drm_handle_from_pt(struct drm_api *api, struct pipe_screen *pscreen,
 236                            struct pipe_texture *pt, unsigned *stride,
 237                            unsigned *handle)
 238 {
 239         struct nouveau_miptree *mt = nouveau_miptree(pt);
 240
 241         if (!mt || !mt->bo)
 242                 return false;
 243
 244         *handle = mt->bo->handle;
 245         *stride = util_format_get_stride(mt->base.format, mt->base.width0);
 246         return true;
 247 }
 248
 249 struct drm_api drm_api_hooks = {
 250         .name = "nouveau",
 251         .driver_name = "nouveau",
 252         .create_screen = nouveau_drm_create_screen,
 253         .create_context = nouveau_drm_create_context,
 254         .texture_from_shared_handle = nouveau_drm_pt_from_name,
 255         .shared_handle_from_texture = nouveau_drm_name_from_pt,
 256         .local_handle_from_texture = nouveau_drm_handle_from_pt,
 257 };
 258
 259 struct drm_api *
 260 drm_api_create() {
 261         return &drm_api_hooks;
 262 }
 263