src/mesa/drivers/dri/nouveau/nouveau_state_cache.c

   1
   2 #include "nouveau_state_cache.h"
   3 #include "nouveau_context.h"
   4 #include "nouveau_object.h"
   5 #include "nouveau_fifo.h"
   6
   7 #define BEGIN_RING_NOFLUSH(subchannel,tag,size) do {                                    \
   8         if (nmesa->fifo.free <= (size))                                                 \
   9                 WAIT_RING(nmesa,(size));                                                \
  10         OUT_RING( ((size)<<18) | ((subchannel) << 13) | (tag));                         \
  11         nmesa->fifo.free -= ((size) + 1);                                               \
  12 }while(0)
  13
  14 // flush all the dirty state
  15 void nouveau_state_cache_flush(nouveauContextPtr nmesa)
  16 {
  17         int i=0;
  18         int run=0;
  19
  20         // fast-path no state changes
  21         if (!nmesa->state_cache.dirty)
  22                 return;
  23         nmesa->state_cache.dirty=0;
  24
  25         do
  26         {
  27                 // jump to a dirty state
  28                 while((nmesa->state_cache.hdirty[i/NOUVEAU_STATE_CACHE_HIER_SIZE]==0)&&(i<NOUVEAU_STATE_CACHE_ENTRIES))
  29                         i=(i&~(NOUVEAU_STATE_CACHE_HIER_SIZE-1))+NOUVEAU_STATE_CACHE_HIER_SIZE;
  30                 while((nmesa->state_cache.atoms[i].dirty==0)&&(i<NOUVEAU_STATE_CACHE_ENTRIES))
  31                         i++;
  32
  33                 // figure out a run of dirty values
  34                 run=0;
  35                 while((nmesa->state_cache.atoms[i+run].dirty)&&(i+run<NOUVEAU_STATE_CACHE_ENTRIES))
  36                         run++;
  37
  38                 // output everything as a single run
  39                 if (run>0) {
  40                         int j;
  41
  42                         BEGIN_RING_NOFLUSH(NvSub3D, i*4, run);
  43                         for(j=0;j<run;j++)
  44                         {
  45                                 OUT_RING(nmesa->state_cache.atoms[i+j].value);
  46                                 nmesa->state_cache.atoms[i+j].dirty=0;
  47                                 if ((i+j)%NOUVEAU_STATE_CACHE_HIER_SIZE==0)
  48                                         nmesa->state_cache.hdirty[(i+j)/NOUVEAU_STATE_CACHE_HIER_SIZE-1]=0;
  49                         }
  50                         i+=run;
  51                 }
  52         }
  53         while(i<NOUVEAU_STATE_CACHE_ENTRIES);
  54         nmesa->state_cache.hdirty[NOUVEAU_STATE_CACHE_HIER_SIZE/NOUVEAU_STATE_CACHE_HIER_SIZE-1]=0;
  55 }
  56
  57
  58 // inits the state cache
  59 void nouveau_state_cache_init(nouveauContextPtr nmesa)
  60 {
  61         int i;
  62         for(i=0;i<NOUVEAU_STATE_CACHE_ENTRIES;i++)
  63         {
  64                 nmesa->state_cache.atoms[i].dirty=0;
  65                 nmesa->state_cache.atoms[i].value=0xDEADBEEF; // nvidia cards like beef
  66         }
  67         nmesa->state_cache.dirty=0;
  68 }
  69