drivers/gpu/drm/nouveau/nouveau_dma.h

   1 /*
   2  * Copyright (C) 2007 Ben Skeggs.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #ifndef __NOUVEAU_DMA_H__
  28 #define __NOUVEAU_DMA_H__
  29
  30 #ifndef NOUVEAU_DMA_DEBUG
  31 #define NOUVEAU_DMA_DEBUG 0
  32 #endif
  33
  34 void nv50_dma_push(struct nouveau_channel *, struct nouveau_bo *,
  35                    int delta, int length);
  36
  37 /*
  38  * There's a hw race condition where you can't jump to your PUT offset,
  39  * to avoid this we jump to offset + SKIPS and fill the difference with
  40  * NOPs.
  41  *
  42  * xf86-video-nv configures the DMA fetch size to 32 bytes, and uses
  43  * a SKIPS value of 8.  Lets assume that the race condition is to do
  44  * with writing into the fetch area, we configure a fetch size of 128
  45  * bytes so we need a larger SKIPS value.
  46  */
  47 #define NOUVEAU_DMA_SKIPS (128 / 4)
  48
  49 /* Hardcoded object assignments to subchannels (subchannel id). */
  50 enum {
  51         NvSubCtxSurf2D  = 0,
  52         NvSubSw         = 1,
  53         NvSubImageBlit  = 2,
  54         NvSub2D         = 3,
  55         NvSubGdiRect    = 3,
  56         NvSubCopy       = 4,
  57 };
  58
  59 /* Object handles. */
  60 enum {
  61         NvM2MF          = 0x80000001,
  62         NvDmaFB         = 0x80000002,
  63         NvDmaTT         = 0x80000003,
  64         NvNotify0       = 0x80000006,
  65         Nv2D            = 0x80000007,
  66         NvCtxSurf2D     = 0x80000008,
  67         NvRop           = 0x80000009,
  68         NvImagePatt     = 0x8000000a,
  69         NvClipRect      = 0x8000000b,
  70         NvGdiRect       = 0x8000000c,
  71         NvImageBlit     = 0x8000000d,
  72         NvSw            = 0x8000000e,
  73         NvSema          = 0x8000000f,
  74         NvEvoSema0      = 0x80000010,
  75         NvEvoSema1      = 0x80000011,
  76         NvNotify1       = 0x80000012,
  77
  78         /* G80+ display objects */
  79         NvEvoVRAM       = 0x01000000,
  80         NvEvoFB16       = 0x01000001,
  81         NvEvoFB32       = 0x01000002,
  82         NvEvoVRAM_LP    = 0x01000003,
  83         NvEvoSync       = 0xcafe0000
  84 };
  85
  86 #define NV_MEMORY_TO_MEMORY_FORMAT                                    0x00000039
  87 #define NV_MEMORY_TO_MEMORY_FORMAT_NAME                               0x00000000
  88 #define NV_MEMORY_TO_MEMORY_FORMAT_SET_REF                            0x00000050
  89 #define NV_MEMORY_TO_MEMORY_FORMAT_NOP                                0x00000100
  90 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY                             0x00000104
  91 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE                 0x00000000
  92 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE_LE_AWAKEN       0x00000001
  93 #define NV_MEMORY_TO_MEMORY_FORMAT_DMA_NOTIFY                         0x00000180
  94 #define NV_MEMORY_TO_MEMORY_FORMAT_DMA_SOURCE                         0x00000184
  95 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN                          0x0000030c
  96
  97 #define NV50_MEMORY_TO_MEMORY_FORMAT                                  0x00005039
  98 #define NV50_MEMORY_TO_MEMORY_FORMAT_UNK200                           0x00000200
  99 #define NV50_MEMORY_TO_MEMORY_FORMAT_UNK21C                           0x0000021c
 100 #define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN_HIGH                   0x00000238
 101 #define NV50_MEMORY_TO_MEMORY_FORMAT_OFFSET_OUT_HIGH                  0x0000023c
 102
 103 static __must_check inline int
 104 RING_SPACE(struct nouveau_channel *chan, int size)
 105 {
 106         int ret;
 107
 108         ret = nouveau_dma_wait(chan, 1, size);
 109         if (ret)
 110                 return ret;
 111
 112         chan->dma.free -= size;
 113         return 0;
 114 }
 115
 116 static inline void
 117 OUT_RING(struct nouveau_channel *chan, int data)
 118 {
 119         if (NOUVEAU_DMA_DEBUG) {
 120                 NV_INFO(chan->dev, "Ch%d/0x%08x: 0x%08x\n",
 121                         chan->id, chan->dma.cur << 2, data);
 122         }
 123
 124         nouveau_bo_wr32(chan->pushbuf_bo, chan->dma.cur++, data);
 125 }
 126
 127 extern void
 128 OUT_RINGp(struct nouveau_channel *chan, const void *data, unsigned nr_dwords);
 129
 130 static inline void
 131 BEGIN_NV04(struct nouveau_channel *chan, int subc, int mthd, int size)
 132 {
 133         OUT_RING(chan, 0x00000000 | (subc << 13) | (size << 18) | mthd);
 134 }
 135
 136 static inline void
 137 BEGIN_NI04(struct nouveau_channel *chan, int subc, int mthd, int size)
 138 {
 139         OUT_RING(chan, 0x40000000 | (subc << 13) | (size << 18) | mthd);
 140 }
 141
 142 static inline void
 143 BEGIN_NVC0(struct nouveau_channel *chan, int subc, int mthd, int size)
 144 {
 145         OUT_RING(chan, 0x20000000 | (size << 16) | (subc << 13) | (mthd >> 2));
 146 }
 147
 148 static inline void
 149 BEGIN_NIC0(struct nouveau_channel *chan, int subc, int mthd, int size)
 150 {
 151         OUT_RING(chan, 0x60000000 | (size << 16) | (subc << 13) | (mthd >> 2));
 152 }
 153
 154 static inline void
 155 BEGIN_IMC0(struct nouveau_channel *chan, int subc, int mthd, u16 data)
 156 {
 157         OUT_RING(chan, 0x80000000 | (data << 16) | (subc << 13) | (mthd >> 2));
 158 }
 159
 160 #define WRITE_PUT(val) do {                                                    \
 161         DRM_MEMORYBARRIER();                                                   \
 162         nouveau_bo_rd32(chan->pushbuf_bo, 0);                                  \
 163         nvchan_wr32(chan, chan->user_put, ((val) << 2) + chan->pushbuf_base);  \
 164 } while (0)
 165
 166 static inline void
 167 FIRE_RING(struct nouveau_channel *chan)
 168 {
 169         if (NOUVEAU_DMA_DEBUG) {
 170                 NV_INFO(chan->dev, "Ch%d/0x%08x: PUSH!\n",
 171                         chan->id, chan->dma.cur << 2);
 172         }
 173
 174         if (chan->dma.cur == chan->dma.put)
 175                 return;
 176         chan->accel_done = true;
 177
 178         if (chan->dma.ib_max) {
 179                 nv50_dma_push(chan, chan->pushbuf_bo, chan->dma.put << 2,
 180                               (chan->dma.cur - chan->dma.put) << 2);
 181         } else {
 182                 WRITE_PUT(chan->dma.cur);
 183         }
 184
 185         chan->dma.put = chan->dma.cur;
 186 }
 187
 188 static inline void
 189 WIND_RING(struct nouveau_channel *chan)
 190 {
 191         chan->dma.cur = chan->dma.put;
 192 }
 193
 194 #endif