LXR linux/drivers/gpu/drm/nouveau/nvkm/engine/sw/chan.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 "chan.h"
  25
  26#include <core/notify.h>
  27#include <engine/fifo.h>
  28
  29#include <nvif/event.h>
  30#include <nvif/unpack.h>
  31
  32bool
  33nvkm_sw_chan_mthd(struct nvkm_sw_chan *chan, int subc, u32 mthd, u32 data)
  34{
  35        switch (mthd) {
  36        case 0x0000:
  37                return true;
  38        case 0x0500:
  39                nvkm_event_send(&chan->event, 1, 0, NULL, 0);
  40                return true;
  41        default:
  42                if (chan->func->mthd)
  43                        return chan->func->mthd(chan, subc, mthd, data);
  44                break;
  45        }
  46        return false;
  47}
  48
  49static int
  50nvkm_sw_chan_event_ctor(struct nvkm_object *object, void *data, u32 size,
  51                        struct nvkm_notify *notify)
  52{
  53        union {
  54                struct nvif_notify_uevent_req none;
  55        } *req = data;
  56        int ret = -ENOSYS;
  57
  58        if (!(ret = nvif_unvers(ret, &data, &size, req->none))) {
  59                notify->size  = sizeof(struct nvif_notify_uevent_rep);
  60                notify->types = 1;
  61                notify->index = 0;
  62        }
  63
  64        return ret;
  65}
  66
  67static const struct nvkm_event_func
  68nvkm_sw_chan_event = {
  69        .ctor = nvkm_sw_chan_event_ctor,
  70};
  71
  72static void *
  73nvkm_sw_chan_dtor(struct nvkm_object *object)
  74{
  75        struct nvkm_sw_chan *chan = nvkm_sw_chan(object);
  76        struct nvkm_sw *sw = chan->sw;
  77        unsigned long flags;
  78        void *data = chan;
  79
  80        if (chan->func->dtor)
  81                data = chan->func->dtor(chan);
  82        nvkm_event_fini(&chan->event);
  83
  84        spin_lock_irqsave(&sw->engine.lock, flags);
  85        list_del(&chan->head);
  86        spin_unlock_irqrestore(&sw->engine.lock, flags);
  87        return data;
  88}
  89
  90static const struct nvkm_object_func
  91nvkm_sw_chan = {
  92        .dtor = nvkm_sw_chan_dtor,
  93};
  94
  95int
  96nvkm_sw_chan_ctor(const struct nvkm_sw_chan_func *func, struct nvkm_sw *sw,
  97                  struct nvkm_fifo_chan *fifo, const struct nvkm_oclass *oclass,
  98                  struct nvkm_sw_chan *chan)
  99{
 100        unsigned long flags;
 101
 102        nvkm_object_ctor(&nvkm_sw_chan, oclass, &chan->object);
 103        chan->func = func;
 104        chan->sw = sw;
 105        chan->fifo = fifo;
 106        spin_lock_irqsave(&sw->engine.lock, flags);
 107        list_add(&chan->head, &sw->chan);
 108        spin_unlock_irqrestore(&sw->engine.lock, flags);
 109
 110        return nvkm_event_init(&nvkm_sw_chan_event, 1, 1, &chan->event);
 111}
 112