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      1 /*	$NetBSD: nouveau_nvkm_engine_sw_base.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_base.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $");
     28 
     29 #include "priv.h"
     30 #include "chan.h"
     31 
     32 #include <engine/fifo.h>
     33 
     34 bool
     35 nvkm_sw_mthd(struct nvkm_sw *sw, int chid, int subc, u32 mthd, u32 data)
     36 {
     37 	struct nvkm_sw_chan *chan;
     38 	bool handled = false;
     39 	unsigned long flags;
     40 
     41 	spin_lock_irqsave(&sw->engine.lock, flags);
     42 	list_for_each_entry(chan, &sw->chan, head) {
     43 		if (chan->fifo->chid == chid) {
     44 			handled = nvkm_sw_chan_mthd(chan, subc, mthd, data);
     45 			list_del(&chan->head);
     46 			list_add(&chan->head, &sw->chan);
     47 			break;
     48 		}
     49 	}
     50 	spin_unlock_irqrestore(&sw->engine.lock, flags);
     51 	return handled;
     52 }
     53 
     54 static int
     55 nvkm_sw_oclass_new(const struct nvkm_oclass *oclass, void *data, u32 size,
     56 		   struct nvkm_object **pobject)
     57 {
     58 	struct nvkm_sw_chan *chan = nvkm_sw_chan(oclass->parent);
     59 	const struct nvkm_sw_chan_sclass *sclass = oclass->engn;
     60 	return sclass->ctor(chan, oclass, data, size, pobject);
     61 }
     62 
     63 static int
     64 nvkm_sw_oclass_get(struct nvkm_oclass *oclass, int index)
     65 {
     66 	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
     67 	int c = 0;
     68 
     69 	while (sw->func->sclass[c].ctor) {
     70 		if (c++ == index) {
     71 			oclass->engn = &sw->func->sclass[index];
     72 			oclass->base =  sw->func->sclass[index].base;
     73 			oclass->base.ctor = nvkm_sw_oclass_new;
     74 			return index;
     75 		}
     76 	}
     77 
     78 	return c;
     79 }
     80 
     81 static int
     82 nvkm_sw_cclass_get(struct nvkm_fifo_chan *fifoch,
     83 		   const struct nvkm_oclass *oclass,
     84 		   struct nvkm_object **pobject)
     85 {
     86 	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
     87 	return sw->func->chan_new(sw, fifoch, oclass, pobject);
     88 }
     89 
     90 static void *
     91 nvkm_sw_dtor(struct nvkm_engine *engine)
     92 {
     93 	return nvkm_sw(engine);
     94 }
     95 
     96 static const struct nvkm_engine_func
     97 nvkm_sw = {
     98 	.dtor = nvkm_sw_dtor,
     99 	.fifo.cclass = nvkm_sw_cclass_get,
    100 	.fifo.sclass = nvkm_sw_oclass_get,
    101 };
    102 
    103 int
    104 nvkm_sw_new_(const struct nvkm_sw_func *func, struct nvkm_device *device,
    105 	     int index, struct nvkm_sw **psw)
    106 {
    107 	struct nvkm_sw *sw;
    108 
    109 	if (!(sw = *psw = kzalloc(sizeof(*sw), GFP_KERNEL)))
    110 		return -ENOMEM;
    111 	INIT_LIST_HEAD(&sw->chan);
    112 	sw->func = func;
    113 
    114 	return nvkm_engine_ctor(&nvkm_sw, device, index, true, &sw->engine);
    115 }
    116