drivers/gpu/drm/nouveau/core/engine/fifo/base.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
  25 #include <core/client.h>
  26 #include <core/object.h>
  27 #include <core/handle.h>
  28 #include <core/event.h>
  29 #include <core/class.h>
  30
  31 #include <engine/dmaobj.h>
  32 #include <engine/fifo.h>
  33
  34 int
  35 nouveau_fifo_channel_create_(struct nouveau_object *parent,
  36                              struct nouveau_object *engine,
  37                              struct nouveau_oclass *oclass,
  38                              int bar, u32 addr, u32 size, u32 pushbuf,
  39                              u64 engmask, int len, void **ptr)
  40 {
  41         struct nouveau_device *device = nv_device(engine);
  42         struct nouveau_fifo *priv = (void *)engine;
  43         struct nouveau_fifo_chan *chan;
  44         struct nouveau_dmaeng *dmaeng;
  45         unsigned long flags;
  46         int ret;
  47
  48         /* create base object class */
  49         ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL,
  50                                      engmask, len, ptr);
  51         chan = *ptr;
  52         if (ret)
  53                 return ret;
  54
  55         /* validate dma object representing push buffer */
  56         chan->pushdma = (void *)nouveau_handle_ref(parent, pushbuf);
  57         if (!chan->pushdma)
  58                 return -ENOENT;
  59
  60         dmaeng = (void *)chan->pushdma->base.engine;
  61         switch (chan->pushdma->base.oclass->handle) {
  62         case NV_DMA_FROM_MEMORY_CLASS:
  63         case NV_DMA_IN_MEMORY_CLASS:
  64                 break;
  65         default:
  66                 return -EINVAL;
  67         }
  68
  69         ret = dmaeng->bind(dmaeng, parent, chan->pushdma, &chan->pushgpu);
  70         if (ret)
  71                 return ret;
  72
  73         /* find a free fifo channel */
  74         spin_lock_irqsave(&priv->lock, flags);
  75         for (chan->chid = priv->min; chan->chid < priv->max; chan->chid++) {
  76                 if (!priv->channel[chan->chid]) {
  77                         priv->channel[chan->chid] = nv_object(chan);
  78                         break;
  79                 }
  80         }
  81         spin_unlock_irqrestore(&priv->lock, flags);
  82
  83         if (chan->chid == priv->max) {
  84                 nv_error(priv, "no free channels\n");
  85                 return -ENOSPC;
  86         }
  87
  88         /* map fifo control registers */
  89         chan->user = ioremap(nv_device_resource_start(device, bar) + addr +
  90                              (chan->chid * size), size);
  91         if (!chan->user)
  92                 return -EFAULT;
  93
  94         nouveau_event_trigger(priv->cevent, 0);
  95
  96         chan->size = size;
  97         return 0;
  98 }
  99
 100 void
 101 nouveau_fifo_channel_destroy(struct nouveau_fifo_chan *chan)
 102 {
 103         struct nouveau_fifo *priv = (void *)nv_object(chan)->engine;
 104         unsigned long flags;
 105
 106         iounmap(chan->user);
 107
 108         spin_lock_irqsave(&priv->lock, flags);
 109         priv->channel[chan->chid] = NULL;
 110         spin_unlock_irqrestore(&priv->lock, flags);
 111
 112         nouveau_gpuobj_ref(NULL, &chan->pushgpu);
 113         nouveau_object_ref(NULL, (struct nouveau_object **)&chan->pushdma);
 114         nouveau_namedb_destroy(&chan->base);
 115 }
 116
 117 void
 118 _nouveau_fifo_channel_dtor(struct nouveau_object *object)
 119 {
 120         struct nouveau_fifo_chan *chan = (void *)object;
 121         nouveau_fifo_channel_destroy(chan);
 122 }
 123
 124 u32
 125 _nouveau_fifo_channel_rd32(struct nouveau_object *object, u64 addr)
 126 {
 127         struct nouveau_fifo_chan *chan = (void *)object;
 128         return ioread32_native(chan->user + addr);
 129 }
 130
 131 void
 132 _nouveau_fifo_channel_wr32(struct nouveau_object *object, u64 addr, u32 data)
 133 {
 134         struct nouveau_fifo_chan *chan = (void *)object;
 135         iowrite32_native(data, chan->user + addr);
 136 }
 137
 138 static int
 139 nouveau_fifo_chid(struct nouveau_fifo *priv, struct nouveau_object *object)
 140 {
 141         int engidx = nv_hclass(priv) & 0xff;
 142
 143         while (object && object->parent) {
 144                 if ( nv_iclass(object->parent, NV_ENGCTX_CLASS) &&
 145                     (nv_hclass(object->parent) & 0xff) == engidx)
 146                         return nouveau_fifo_chan(object)->chid;
 147                 object = object->parent;
 148         }
 149
 150         return -1;
 151 }
 152
 153 const char *
 154 nouveau_client_name_for_fifo_chid(struct nouveau_fifo *fifo, u32 chid)
 155 {
 156         struct nouveau_fifo_chan *chan = NULL;
 157         unsigned long flags;
 158
 159         spin_lock_irqsave(&fifo->lock, flags);
 160         if (chid >= fifo->min && chid <= fifo->max)
 161                 chan = (void *)fifo->channel[chid];
 162         spin_unlock_irqrestore(&fifo->lock, flags);
 163
 164         return nouveau_client_name(chan);
 165 }
 166
 167 void
 168 nouveau_fifo_destroy(struct nouveau_fifo *priv)
 169 {
 170         kfree(priv->channel);
 171         nouveau_event_destroy(&priv->uevent);
 172         nouveau_event_destroy(&priv->cevent);
 173         nouveau_engine_destroy(&priv->base);
 174 }
 175
 176 int
 177 nouveau_fifo_create_(struct nouveau_object *parent,
 178                      struct nouveau_object *engine,
 179                      struct nouveau_oclass *oclass,
 180                      int min, int max, int length, void **pobject)
 181 {
 182         struct nouveau_fifo *priv;
 183         int ret;
 184
 185         ret = nouveau_engine_create_(parent, engine, oclass, true, "PFIFO",
 186                                      "fifo", length, pobject);
 187         priv = *pobject;
 188         if (ret)
 189                 return ret;
 190
 191         priv->min = min;
 192         priv->max = max;
 193         priv->channel = kzalloc(sizeof(*priv->channel) * (max + 1), GFP_KERNEL);
 194         if (!priv->channel)
 195                 return -ENOMEM;
 196
 197         ret = nouveau_event_create(1, &priv->cevent);
 198         if (ret)
 199                 return ret;
 200
 201         ret = nouveau_event_create(1, &priv->uevent);
 202         if (ret)
 203                 return ret;
 204
 205         priv->chid = nouveau_fifo_chid;
 206         spin_lock_init(&priv->lock);
 207         return 0;
 208 }