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      1 /*	$NetBSD: nouveau_nvkm_engine_sw_chan.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2015 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs <bskeggs (at) redhat.com>
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_sw_chan.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $");
     28 
     29 #include "chan.h"
     30 
     31 #include <core/notify.h>
     32 #include <engine/fifo.h>
     33 
     34 #include <nvif/event.h>
     35 #include <nvif/unpack.h>
     36 
     37 bool
     38 nvkm_sw_chan_mthd(struct nvkm_sw_chan *chan, int subc, u32 mthd, u32 data)
     39 {
     40 	switch (mthd) {
     41 	case 0x0000:
     42 		return true;
     43 	case 0x0500:
     44 		nvkm_event_send(&chan->event, 1, 0, NULL, 0);
     45 		return true;
     46 	default:
     47 		if (chan->func->mthd)
     48 			return chan->func->mthd(chan, subc, mthd, data);
     49 		break;
     50 	}
     51 	return false;
     52 }
     53 
     54 static int
     55 nvkm_sw_chan_event_ctor(struct nvkm_object *object, void *data, u32 size,
     56 			struct nvkm_notify *notify)
     57 {
     58 	union {
     59 		struct nvif_notify_uevent_req none;
     60 	} *req = data;
     61 	int ret = -ENOSYS;
     62 
     63 	if (!(ret = nvif_unvers(ret, &data, &size, req->none))) {
     64 		notify->size  = sizeof(struct nvif_notify_uevent_rep);
     65 		notify->types = 1;
     66 		notify->index = 0;
     67 	}
     68 
     69 	return ret;
     70 }
     71 
     72 static const struct nvkm_event_func
     73 nvkm_sw_chan_event = {
     74 	.ctor = nvkm_sw_chan_event_ctor,
     75 };
     76 
     77 static void *
     78 nvkm_sw_chan_dtor(struct nvkm_object *object)
     79 {
     80 	struct nvkm_sw_chan *chan = nvkm_sw_chan(object);
     81 	struct nvkm_sw *sw = chan->sw;
     82 	unsigned long flags;
     83 	void *data = chan;
     84 
     85 	if (chan->func->dtor)
     86 		data = chan->func->dtor(chan);
     87 	nvkm_event_fini(&chan->event);
     88 
     89 	spin_lock_irqsave(&sw->engine.lock, flags);
     90 	list_del(&chan->head);
     91 	spin_unlock_irqrestore(&sw->engine.lock, flags);
     92 	return data;
     93 }
     94 
     95 static const struct nvkm_object_func
     96 nvkm_sw_chan = {
     97 	.dtor = nvkm_sw_chan_dtor,
     98 };
     99 
    100 int
    101 nvkm_sw_chan_ctor(const struct nvkm_sw_chan_func *func, struct nvkm_sw *sw,
    102 		  struct nvkm_fifo_chan *fifo, const struct nvkm_oclass *oclass,
    103 		  struct nvkm_sw_chan *chan)
    104 {
    105 	unsigned long flags;
    106 
    107 	nvkm_object_ctor(&nvkm_sw_chan, oclass, &chan->object);
    108 	chan->func = func;
    109 	chan->sw = sw;
    110 	chan->fifo = fifo;
    111 	spin_lock_irqsave(&sw->engine.lock, flags);
    112 	list_add(&chan->head, &sw->chan);
    113 	spin_unlock_irqrestore(&sw->engine.lock, flags);
    114 
    115 	return nvkm_event_init(&nvkm_sw_chan_event, 1, 1, &chan->event);
    116 }
    117