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      1 /*	$NetBSD: nouveau_nvkm_engine_sw_nv50.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 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
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_sw_nv50.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $");
     28 
     29 #include "nv50.h"
     30 
     31 #include <core/gpuobj.h>
     32 #include <engine/disp.h>
     33 #include <engine/fifo/chan.h>
     34 #include <subdev/bar.h>
     35 
     36 #include <nvif/class.h>
     37 #include <nvif/event.h>
     38 
     39 /*******************************************************************************
     40  * software context
     41  ******************************************************************************/
     42 
     43 static int
     44 nv50_sw_chan_vblsem_release(struct nvkm_notify *notify)
     45 {
     46 	struct nv50_sw_chan *chan =
     47 		container_of(notify, typeof(*chan), vblank.notify[notify->index]);
     48 	struct nvkm_sw *sw = chan->base.sw;
     49 	struct nvkm_device *device = sw->engine.subdev.device;
     50 
     51 	nvkm_wr32(device, 0x001704, chan->base.fifo->inst->addr >> 12);
     52 	nvkm_wr32(device, 0x001710, 0x80000000 | chan->vblank.ctxdma);
     53 	nvkm_bar_flush(device->bar);
     54 
     55 	if (device->chipset == 0x50) {
     56 		nvkm_wr32(device, 0x001570, chan->vblank.offset);
     57 		nvkm_wr32(device, 0x001574, chan->vblank.value);
     58 	} else {
     59 		nvkm_wr32(device, 0x060010, chan->vblank.offset);
     60 		nvkm_wr32(device, 0x060014, chan->vblank.value);
     61 	}
     62 
     63 	return NVKM_NOTIFY_DROP;
     64 }
     65 
     66 static bool
     67 nv50_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
     68 {
     69 	struct nv50_sw_chan *chan = nv50_sw_chan(base);
     70 	struct nvkm_engine *engine = chan->base.object.engine;
     71 	struct nvkm_device *device = engine->subdev.device;
     72 	switch (mthd) {
     73 	case 0x018c: chan->vblank.ctxdma = data; return true;
     74 	case 0x0400: chan->vblank.offset = data; return true;
     75 	case 0x0404: chan->vblank.value  = data; return true;
     76 	case 0x0408:
     77 		if (data < device->disp->vblank.index_nr) {
     78 			nvkm_notify_get(&chan->vblank.notify[data]);
     79 			return true;
     80 		}
     81 		break;
     82 	default:
     83 		break;
     84 	}
     85 	return false;
     86 }
     87 
     88 void *
     89 nv50_sw_chan_dtor(struct nvkm_sw_chan *base)
     90 {
     91 	struct nv50_sw_chan *chan = nv50_sw_chan(base);
     92 	int i;
     93 	for (i = 0; i < ARRAY_SIZE(chan->vblank.notify); i++)
     94 		nvkm_notify_fini(&chan->vblank.notify[i]);
     95 	return chan;
     96 }
     97 
     98 static const struct nvkm_sw_chan_func
     99 nv50_sw_chan = {
    100 	.dtor = nv50_sw_chan_dtor,
    101 	.mthd = nv50_sw_chan_mthd,
    102 };
    103 
    104 static int
    105 nv50_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifoch,
    106 		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
    107 {
    108 	struct nvkm_disp *disp = sw->engine.subdev.device->disp;
    109 	struct nv50_sw_chan *chan;
    110 	int ret, i;
    111 
    112 	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
    113 		return -ENOMEM;
    114 	*pobject = &chan->base.object;
    115 
    116 	ret = nvkm_sw_chan_ctor(&nv50_sw_chan, sw, fifoch, oclass, &chan->base);
    117 	if (ret)
    118 		return ret;
    119 
    120 	for (i = 0; disp && i < disp->vblank.index_nr; i++) {
    121 		ret = nvkm_notify_init(NULL, &disp->vblank,
    122 				       nv50_sw_chan_vblsem_release, false,
    123 				       &(struct nvif_notify_head_req_v0) {
    124 					.head = i,
    125 				       },
    126 				       sizeof(struct nvif_notify_head_req_v0),
    127 				       sizeof(struct nvif_notify_head_rep_v0),
    128 				       &chan->vblank.notify[i]);
    129 		if (ret)
    130 			return ret;
    131 	}
    132 
    133 	return 0;
    134 }
    135 
    136 /*******************************************************************************
    137  * software engine/subdev functions
    138  ******************************************************************************/
    139 
    140 static const struct nvkm_sw_func
    141 nv50_sw = {
    142 	.chan_new = nv50_sw_chan_new,
    143 	.sclass = {
    144 		{ nvkm_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV50 } },
    145 		{}
    146 	}
    147 };
    148 
    149 int
    150 nv50_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
    151 {
    152 	return nvkm_sw_new_(&nv50_sw, device, index, psw);
    153 }
    154