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