kernel/drivers/gpu/drm/nouveau/nvkm/engine/fifo/dmanv04.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24 #include "channv04.h"
  25 #include "regsnv04.h"
  26
  27 #include <core/client.h>
  28 #include <core/ramht.h>
  29 #include <subdev/instmem.h>
  30
  31 #include <nvif/class.h>
  32 #include <nvif/unpack.h>
  33
  34 void
  35 nv04_fifo_dma_object_dtor(struct nvkm_fifo_chan *base, int cookie)
  36 {
  37         struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
  38         struct nvkm_instmem *imem = chan->fifo->base.engine.subdev.device->imem;
  39         nvkm_ramht_remove(imem->ramht, cookie);
  40 }
  41
  42 static int
  43 nv04_fifo_dma_object_ctor(struct nvkm_fifo_chan *base,
  44                           struct nvkm_object *object)
  45 {
  46         struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
  47         struct nvkm_instmem *imem = chan->fifo->base.engine.subdev.device->imem;
  48         u32 context = 0x80000000 | chan->base.chid << 24;
  49         u32 handle  = object->handle;
  50         int hash;
  51
  52         switch (object->engine->subdev.index) {
  53         case NVKM_ENGINE_DMAOBJ:
  54         case NVKM_ENGINE_SW    : context |= 0x00000000; break;
  55         case NVKM_ENGINE_GR    : context |= 0x00010000; break;
  56         case NVKM_ENGINE_MPEG  : context |= 0x00020000; break;
  57         default:
  58                 WARN_ON(1);
  59                 return -EINVAL;
  60         }
  61
  62         mutex_lock(&chan->fifo->base.engine.subdev.mutex);
  63         hash = nvkm_ramht_insert(imem->ramht, object, chan->base.chid, 4,
  64                                  handle, context);
  65         mutex_unlock(&chan->fifo->base.engine.subdev.mutex);
  66         return hash;
  67 }
  68
  69 void
  70 nv04_fifo_dma_fini(struct nvkm_fifo_chan *base)
  71 {
  72         struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
  73         struct nv04_fifo *fifo = chan->fifo;
  74         struct nvkm_device *device = fifo->base.engine.subdev.device;
  75         struct nvkm_memory *fctx = device->imem->ramfc;
  76         const struct nv04_fifo_ramfc *c;
  77         unsigned long flags;
  78         u32 mask = fifo->base.nr - 1;
  79         u32 data = chan->ramfc;
  80         u32 chid;
  81
  82         /* prevent fifo context switches */
  83         spin_lock_irqsave(&fifo->base.lock, flags);
  84         nvkm_wr32(device, NV03_PFIFO_CACHES, 0);
  85
  86         /* if this channel is active, replace it with a null context */
  87         chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & mask;
  88         if (chid == chan->base.chid) {
  89                 nvkm_mask(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0x00000001, 0);
  90                 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 0);
  91                 nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0);
  92
  93                 c = fifo->ramfc;
  94                 do {
  95                         u32 rm = ((1ULL << c->bits) - 1) << c->regs;
  96                         u32 cm = ((1ULL << c->bits) - 1) << c->ctxs;
  97                         u32 rv = (nvkm_rd32(device, c->regp) &  rm) >> c->regs;
  98                         u32 cv = (nvkm_ro32(fctx, c->ctxp + data) & ~cm);
  99                         nvkm_wo32(fctx, c->ctxp + data, cv | (rv << c->ctxs));
 100                 } while ((++c)->bits);
 101
 102                 c = fifo->ramfc;
 103                 do {
 104                         nvkm_wr32(device, c->regp, 0x00000000);
 105                 } while ((++c)->bits);
 106
 107                 nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, 0);
 108                 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUT, 0);
 109                 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, mask);
 110                 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1);
 111                 nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
 112         }
 113
 114         /* restore normal operation, after disabling dma mode */
 115         nvkm_mask(device, NV04_PFIFO_MODE, 1 << chan->base.chid, 0);
 116         nvkm_wr32(device, NV03_PFIFO_CACHES, 1);
 117         spin_unlock_irqrestore(&fifo->base.lock, flags);
 118 }
 119
 120 void
 121 nv04_fifo_dma_init(struct nvkm_fifo_chan *base)
 122 {
 123         struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
 124         struct nv04_fifo *fifo = chan->fifo;
 125         struct nvkm_device *device = fifo->base.engine.subdev.device;
 126         u32 mask = 1 << chan->base.chid;
 127         unsigned long flags;
 128         spin_lock_irqsave(&fifo->base.lock, flags);
 129         nvkm_mask(device, NV04_PFIFO_MODE, mask, mask);
 130         spin_unlock_irqrestore(&fifo->base.lock, flags);
 131 }
 132
 133 void *
 134 nv04_fifo_dma_dtor(struct nvkm_fifo_chan *base)
 135 {
 136         struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
 137         struct nv04_fifo *fifo = chan->fifo;
 138         struct nvkm_instmem *imem = fifo->base.engine.subdev.device->imem;
 139         const struct nv04_fifo_ramfc *c = fifo->ramfc;
 140
 141         nvkm_kmap(imem->ramfc);
 142         do {
 143                 nvkm_wo32(imem->ramfc, chan->ramfc + c->ctxp, 0x00000000);
 144         } while ((++c)->bits);
 145         nvkm_done(imem->ramfc);
 146         return chan;
 147 }
 148
 149 const struct nvkm_fifo_chan_func
 150 nv04_fifo_dma_func = {
 151         .dtor = nv04_fifo_dma_dtor,
 152         .init = nv04_fifo_dma_init,
 153         .fini = nv04_fifo_dma_fini,
 154         .object_ctor = nv04_fifo_dma_object_ctor,
 155         .object_dtor = nv04_fifo_dma_object_dtor,
 156 };
 157
 158 static int
 159 nv04_fifo_dma_new(struct nvkm_fifo *base, const struct nvkm_oclass *oclass,
 160                   void *data, u32 size, struct nvkm_object **pobject)
 161 {
 162         struct nvkm_object *parent = oclass->parent;
 163         union {
 164                 struct nv03_channel_dma_v0 v0;
 165         } *args = data;
 166         struct nv04_fifo *fifo = nv04_fifo(base);
 167         struct nv04_fifo_chan *chan = NULL;
 168         struct nvkm_device *device = fifo->base.engine.subdev.device;
 169         struct nvkm_instmem *imem = device->imem;
 170         int ret;
 171
 172         nvif_ioctl(parent, "create channel dma size %d\n", size);
 173         if (nvif_unpack(args->v0, 0, 0, false)) {
 174                 nvif_ioctl(parent, "create channel dma vers %d pushbuf %llx "
 175                                    "offset %08x\n", args->v0.version,
 176                            args->v0.pushbuf, args->v0.offset);
 177                 if (!args->v0.pushbuf)
 178                         return -EINVAL;
 179         } else
 180                 return ret;
 181
 182         if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
 183                 return -ENOMEM;
 184         *pobject = &chan->base.object;
 185
 186         ret = nvkm_fifo_chan_ctor(&nv04_fifo_dma_func, &fifo->base,
 187                                   0x1000, 0x1000, false, 0, args->v0.pushbuf,
 188                                   (1ULL << NVKM_ENGINE_DMAOBJ) |
 189                                   (1ULL << NVKM_ENGINE_GR) |
 190                                   (1ULL << NVKM_ENGINE_SW),
 191                                   0, 0x800000, 0x10000, oclass, &chan->base);
 192         chan->fifo = fifo;
 193         if (ret)
 194                 return ret;
 195
 196         args->v0.chid = chan->base.chid;
 197         chan->ramfc = chan->base.chid * 32;
 198
 199         nvkm_kmap(imem->ramfc);
 200         nvkm_wo32(imem->ramfc, chan->ramfc + 0x00, args->v0.offset);
 201         nvkm_wo32(imem->ramfc, chan->ramfc + 0x04, args->v0.offset);
 202         nvkm_wo32(imem->ramfc, chan->ramfc + 0x08, chan->base.push->addr >> 4);
 203         nvkm_wo32(imem->ramfc, chan->ramfc + 0x10,
 204                                NV_PFIFO_CACHE1_DMA_FETCH_TRIG_128_BYTES |
 205                                NV_PFIFO_CACHE1_DMA_FETCH_SIZE_128_BYTES |
 206 #ifdef __BIG_ENDIAN
 207                                NV_PFIFO_CACHE1_BIG_ENDIAN |
 208 #endif
 209                                NV_PFIFO_CACHE1_DMA_FETCH_MAX_REQS_8);
 210         nvkm_done(imem->ramfc);
 211         return 0;
 212 }
 213
 214 const struct nvkm_fifo_chan_oclass
 215 nv04_fifo_dma_oclass = {
 216         .base.oclass = NV03_CHANNEL_DMA,
 217         .base.minver = 0,
 218         .base.maxver = 0,
 219         .ctor = nv04_fifo_dma_new,
 220 };