sys/external/bsd/drm/dist/libdrm/nouveau/nouveau_dma.h

   1 /*
   2  * Copyright 2007 Nouveau Project
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #ifndef __NOUVEAU_DMA_H__
  24 #define __NOUVEAU_DMA_H__
  25
  26 #include <string.h>
  27 #include "nouveau_private.h"
  28
  29 //#define NOUVEAU_DMA_DEBUG
  30 //#define NOUVEAU_DMA_TRACE
  31 //#define NOUVEAU_DMA_DUMP_POSTRELOC_PUSHBUF
  32 #if defined(__amd64__)
  33 #define NOUVEAU_DMA_BARRIER asm volatile("lock; addl $0,0(%%rsp)" ::: "memory")
  34 #elif defined(__i386__)
  35 #define NOUVEAU_DMA_BARRIER asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
  36 #else
  37 #define NOUVEAU_DMA_BARRIER
  38 #endif
  39 #define NOUVEAU_DMA_TIMEOUT 2000
  40 #define NOUVEAU_TIME_MSEC() 0
  41 #define RING_SKIPS 8
  42
  43 extern int  nouveau_dma_wait(struct nouveau_channel *chan, unsigned size);
  44 extern void nouveau_dma_subc_bind(struct nouveau_grobj *);
  45 extern void nouveau_dma_channel_init(struct nouveau_channel *);
  46 extern void nouveau_dma_kickoff(struct nouveau_channel *);
  47
  48 #ifdef NOUVEAU_DMA_DEBUG
  49 static char faulty[1024];
  50 #endif
  51
  52 static inline void
  53 nouveau_dma_out(struct nouveau_channel *chan, uint32_t data)
  54 {
  55         struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
  56         struct nouveau_dma_priv *dma = nvchan->dma;
  57
  58 #ifdef NOUVEAU_DMA_DEBUG
  59         if (dma->push_free == 0) {
  60                 printf("No space left in packet at %s\n", faulty);
  61                 return;
  62         }
  63         dma->push_free--;
  64 #endif
  65 #ifdef NOUVEAU_DMA_TRACE
  66         {
  67                 uint32_t offset = (dma->cur << 2) + dma->base;
  68                 printf("\tOUT_RING %d/0x%08x -> 0x%08x\n",
  69                        nvchan->drm.channel, offset, data);
  70         }
  71 #endif
  72         nvchan->pushbuf[dma->cur + (dma->base - nvchan->drm.put_base)/4] = data;
  73         dma->cur++;
  74 }
  75
  76 static inline void
  77 nouveau_dma_outp(struct nouveau_channel *chan, uint32_t *ptr, int size)
  78 {
  79         struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
  80         struct nouveau_dma_priv *dma = nvchan->dma;
  81         (void)dma;
  82
  83 #ifdef NOUVEAU_DMA_DEBUG
  84         if (dma->push_free < size) {
  85                 printf("Packet too small.  Free=%d, Need=%d\n",
  86                        dma->push_free, size);
  87                 return;
  88         }
  89 #endif
  90 #ifdef NOUVEAU_DMA_TRACE
  91         while (size--) {
  92                 nouveau_dma_out(chan, *ptr);
  93                 ptr++;
  94         }
  95 #else
  96         memcpy(&nvchan->pushbuf[dma->cur], ptr, size << 2);
  97 #ifdef NOUVEAU_DMA_DEBUG
  98         dma->push_free -= size;
  99 #endif
 100         dma->cur += size;
 101 #endif
 102 }
 103
 104 static inline void
 105 nouveau_dma_space(struct nouveau_channel *chan, unsigned size)
 106 {
 107         struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
 108         struct nouveau_dma_priv *dma = nvchan->dma;
 109
 110         if (dma->free < size) {
 111                 if (nouveau_dma_wait(chan, size) && chan->hang_notify)
 112                         chan->hang_notify(chan);
 113         }
 114         dma->free -= size;
 115 #ifdef NOUVEAU_DMA_DEBUG
 116         dma->push_free = size;
 117 #endif
 118 }
 119
 120 static inline void
 121 nouveau_dma_begin(struct nouveau_channel *chan, struct nouveau_grobj *grobj,
 122                   int method, int size, const char* file, int line)
 123 {
 124         struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
 125         struct nouveau_dma_priv *dma = nvchan->dma;
 126         (void)dma;
 127
 128 #ifdef NOUVEAU_DMA_TRACE
 129         printf("BEGIN_RING %d/%08x/%d/0x%04x/%d\n", nvchan->drm.channel,
 130                grobj->handle, grobj->subc, method, size);
 131 #endif
 132
 133 #ifdef NOUVEAU_DMA_DEBUG
 134         if (dma->push_free) {
 135                 printf("Previous packet incomplete: %d left at %s\n",
 136                        dma->push_free, faulty);
 137                 return;
 138         }
 139         sprintf(faulty,"%s:%d",file,line);
 140 #endif
 141
 142         nouveau_dma_space(chan, (size + 1));
 143         nouveau_dma_out(chan, (size << 18) | (grobj->subc << 13) | method);
 144 }
 145
 146 #define RING_SPACE_CH(ch,sz)         nouveau_dma_space((ch), (sz))
 147 #define BEGIN_RING_CH(ch,gr,m,sz)    nouveau_dma_begin((ch), (gr), (m), (sz), __FUNCTION__, __LINE__ )
 148 #define OUT_RING_CH(ch, data)        nouveau_dma_out((ch), (data))
 149 #define OUT_RINGp_CH(ch,ptr,dwords)  nouveau_dma_outp((ch), (void*)(ptr),      \
 150                                                       (dwords))
 151 #define FIRE_RING_CH(ch)             nouveau_dma_kickoff((ch))
 152 #define WAIT_RING_CH(ch,sz)          nouveau_dma_wait((ch), (sz))
 153
 154 #endif