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
 29bool
 30nvkm_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->id == 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
 49static int
 50nvkm_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
 58static int
 59nvkm_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
 76static int
 77nvkm_sw_cclass_get(struct nvkm_chan *fifoch, const struct nvkm_oclass *oclass,
 78		   struct nvkm_object **pobject)
 79{
 80	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
 81	return sw->func->chan_new(sw, fifoch, oclass, pobject);
 82}
 83
 84static void *
 85nvkm_sw_dtor(struct nvkm_engine *engine)
 86{
 87	return nvkm_sw(engine);
 88}
 89
 90static const struct nvkm_engine_func
 91nvkm_sw = {
 92	.dtor = nvkm_sw_dtor,
 93	.fifo.cclass = nvkm_sw_cclass_get,
 94	.fifo.sclass = nvkm_sw_oclass_get,
 95};
 96
 97int
 98nvkm_sw_new_(const struct nvkm_sw_func *func, struct nvkm_device *device,
 99	     enum nvkm_subdev_type type, int inst, struct nvkm_sw **psw)
100{
101	struct nvkm_sw *sw;
102
103	if (!(sw = *psw = kzalloc(sizeof(*sw), GFP_KERNEL)))
104		return -ENOMEM;
105	INIT_LIST_HEAD(&sw->chan);
106	sw->func = func;
107
108	return nvkm_engine_ctor(&nvkm_sw, device, type, inst, true, &sw->engine);
109}