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 #include "util/u_inlines.h"
   6
   7 #include "nouveau_drm_api.h"
   8
   9 #include "nouveau_drmif.h"
  10 #include "nouveau_channel.h"
  11 #include "nouveau_bo.h"
  12
  13 #include "nouveau/nouveau_winsys.h"
  14 #include "nouveau/nouveau_screen.h"
  15
  16 static struct pipe_surface *
  17 dri_surface_from_handle(struct drm_api *api, struct pipe_screen *pscreen,
  18                         unsigned handle, enum pipe_format format,
  19                         unsigned width, unsigned height, unsigned pitch)
  20 {
  21         struct pipe_surface *ps = NULL;
  22         struct pipe_texture *pt = NULL;
  23         struct pipe_texture tmpl;
  24         struct winsys_handle whandle;
  25
  26         memset(&tmpl, 0, sizeof(tmpl));
  27         tmpl.tex_usage = PIPE_TEXTURE_USAGE_SCANOUT;
  28         tmpl.target = PIPE_TEXTURE_2D;
  29         tmpl.last_level = 0;
  30         tmpl.depth0 = 1;
  31         tmpl.format = format;
  32         tmpl.width0 = width;
  33         tmpl.height0 = height;
  34
  35         memset(&whandle, 0, sizeof(whandle));
  36         whandle.stride = pitch;
  37         whandle.handle = handle;
  38
  39         pt = pscreen->texture_from_handle(pscreen, &tmpl, &whandle);
  40         if (!pt)
  41                 return NULL;
  42
  43         ps = pscreen->get_tex_surface(pscreen, pt, 0, 0, 0,
  44                                       PIPE_BUFFER_USAGE_GPU_READ |
  45                                       PIPE_BUFFER_USAGE_GPU_WRITE);
  46
  47         /* we don't need the texture from this point on */
  48         pipe_texture_reference(&pt, NULL);
  49         return ps;
  50 }
  51
  52 static struct pipe_surface *
  53 nouveau_dri1_front_surface(struct pipe_context *pipe)
  54 {
  55         return nouveau_winsys_screen(pipe->screen)->front;
  56 }
  57
  58 static struct dri1_api nouveau_dri1_api = {
  59         nouveau_dri1_front_surface,
  60 };
  61
  62 static void
  63 nouveau_drm_destroy_winsys(struct pipe_winsys *s)
  64 {
  65         struct nouveau_winsys *nv_winsys = nouveau_winsys(s);
  66         struct nouveau_screen *nv_screen= nouveau_screen(nv_winsys->pscreen);
  67         nouveau_device_close(&nv_screen->device);
  68         FREE(nv_winsys);
  69 }
  70
  71 static struct pipe_screen *
  72 nouveau_drm_create_screen(struct drm_api *api, int fd,
  73                           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 0x30:
  89                 init = nv30_screen_create;
  90                 break;
  91         case 0x40:
  92         case 0x60:
  93                 init = nv40_screen_create;
  94                 break;
  95         case 0x50:
  96         case 0x80:
  97         case 0x90:
  98         case 0xa0:
  99                 init = nv50_screen_create;
 100                 break;
 101         default:
 102                 debug_printf("%s: unknown chipset nv%02x\n", __func__,
 103                              dev->chipset);
 104                 return NULL;
 105         }
 106
 107         nvws = CALLOC_STRUCT(nouveau_winsys);
 108         if (!nvws) {
 109                 nouveau_device_close(&dev);
 110                 return NULL;
 111         }
 112         ws = &nvws->base;
 113         ws->destroy = nouveau_drm_destroy_winsys;
 114
 115         nvws->pscreen = init(ws, dev);
 116         if (!nvws->pscreen) {
 117                 ws->destroy(ws);
 118                 return NULL;
 119         }
 120
 121         if (arg && arg->mode == DRM_CREATE_DRI1) {
 122                 struct nouveau_dri *nvdri = dri1->ddx_info;
 123                 enum pipe_format format;
 124
 125                 if (nvdri->bpp == 16)
 126                         format = PIPE_FORMAT_B5G6R5_UNORM;
 127                 else
 128                         format = PIPE_FORMAT_B8G8R8A8_UNORM;
 129
 130                 nvws->front = dri_surface_from_handle(api, nvws->pscreen,
 131                                                       nvdri->front_offset,
 132                                                       format, nvdri->width,
 133                                                       nvdri->height,
 134                                                       nvdri->front_pitch *
 135                                                       (nvdri->bpp / 8));
 136                 if (!nvws->front) {
 137                         debug_printf("%s: error referencing front buffer\n",
 138                                      __func__);
 139                         ws->destroy(ws);
 140                         return NULL;
 141                 }
 142
 143                 dri1->api = &nouveau_dri1_api;
 144         }
 145
 146         return nvws->pscreen;
 147 }
 148
 149 struct drm_api drm_api_hooks = {
 150         .name = "nouveau",
 151         .driver_name = "nouveau",
 152         .create_screen = nouveau_drm_create_screen,
 153 };
 154
 155 struct drm_api *
 156 drm_api_create() {
 157         return &drm_api_hooks;
 158 }
 159