kernel/drivers/gpu/drm/nouveau/nvkm/engine/sw/base.c

   1 /*
   2  * Copyright 2015 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 <bskeggs@redhat.com>
  23  */
  24 #include "priv.h"
  25 #include "chan.h"
  26
  27 #include <engine/fifo.h>
  28
  29 bool
  30 nvkm_sw_mthd(struct nvkm_sw *sw, int chid, int subc, u32 mthd, u32 data)
  31 {
  32         struct nvkm_sw_chan *chan;
  33         bool handled = false;
  34         unsigned long flags;
  35
  36         spin_lock_irqsave(&sw->engine.lock, flags);
  37         list_for_each_entry(chan, &sw->chan, head) {
  38                 if (chan->fifo->chid == chid) {
  39                         handled = nvkm_sw_chan_mthd(chan, subc, mthd, data);
  40                         list_del(&chan->head);
  41                         list_add(&chan->head, &sw->chan);
  42                         break;
  43                 }
  44         }
  45         spin_unlock_irqrestore(&sw->engine.lock, flags);
  46         return handled;
  47 }
  48
  49 static int
  50 nvkm_sw_oclass_new(const struct nvkm_oclass *oclass, void *data, u32 size,
  51                    struct nvkm_object **pobject)
  52 {
  53         struct nvkm_sw_chan *chan = nvkm_sw_chan(oclass->parent);
  54         const struct nvkm_sw_chan_sclass *sclass = oclass->engn;
  55         return sclass->ctor(chan, oclass, data, size, pobject);
  56 }
  57
  58 static int
  59 nvkm_sw_oclass_get(struct nvkm_oclass *oclass, int index)
  60 {
  61         struct nvkm_sw *sw = nvkm_sw(oclass->engine);
  62         int c = 0;
  63
  64         while (sw->func->sclass[c].ctor) {
  65                 if (c++ == index) {
  66                         oclass->engn = &sw->func->sclass[index];
  67                         oclass->base =  sw->func->sclass[index].base;
  68                         oclass->base.ctor = nvkm_sw_oclass_new;
  69                         return index;
  70                 }
  71         }
  72
  73         return c;
  74 }
  75
  76 static int
  77 nvkm_sw_cclass_get(struct nvkm_fifo_chan *fifoch,
  78                    const struct nvkm_oclass *oclass,
  79                    struct nvkm_object **pobject)
  80 {
  81         struct nvkm_sw *sw = nvkm_sw(oclass->engine);
  82         return sw->func->chan_new(sw, fifoch, oclass, pobject);
  83 }
  84
  85 static void *
  86 nvkm_sw_dtor(struct nvkm_engine *engine)
  87 {
  88         return nvkm_sw(engine);
  89 }
  90
  91 static const struct nvkm_engine_func
  92 nvkm_sw = {
  93         .dtor = nvkm_sw_dtor,
  94         .fifo.cclass = nvkm_sw_cclass_get,
  95         .fifo.sclass = nvkm_sw_oclass_get,
  96 };
  97
  98 int
  99 nvkm_sw_new_(const struct nvkm_sw_func *func, struct nvkm_device *device,
 100              int index, struct nvkm_sw **psw)
 101 {
 102         struct nvkm_sw *sw;
 103
 104         if (!(sw = *psw = kzalloc(sizeof(*sw), GFP_KERNEL)))
 105                 return -ENOMEM;
 106         INIT_LIST_HEAD(&sw->chan);
 107         sw->func = func;
 108
 109         return nvkm_engine_ctor(&nvkm_sw, device, index, 0, true, &sw->engine);
 110 }