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_notify *notify)
40 {
41 	struct nv50_sw_chan *chan =
42 		container_of(notify, typeof(*chan), vblank.notify[notify->index]);
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_NOTIFY_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_notify_get(&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 	for (i = 0; i < ARRAY_SIZE(chan->vblank.notify); i++)
89 		nvkm_notify_fini(&chan->vblank.notify[i]);
90 	return chan;
91 }
92 
93 static const struct nvkm_sw_chan_func
94 nv50_sw_chan = {
95 	.dtor = nv50_sw_chan_dtor,
96 	.mthd = nv50_sw_chan_mthd,
97 };
98 
99 static int
100 nv50_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifoch,
101 		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
102 {
103 	struct nvkm_disp *disp = sw->engine.subdev.device->disp;
104 	struct nv50_sw_chan *chan;
105 	int ret, i;
106 
107 	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
108 		return -ENOMEM;
109 	*pobject = &chan->base.object;
110 
111 	ret = nvkm_sw_chan_ctor(&nv50_sw_chan, sw, fifoch, oclass, &chan->base);
112 	if (ret)
113 		return ret;
114 
115 	for (i = 0; disp && i < disp->vblank.index_nr; i++) {
116 		ret = nvkm_notify_init(NULL, &disp->vblank,
117 				       nv50_sw_chan_vblsem_release, false,
118 				       &(struct nvif_notify_head_req_v0) {
119 					.head = i,
120 				       },
121 				       sizeof(struct nvif_notify_head_req_v0),
122 				       sizeof(struct nvif_notify_head_rep_v0),
123 				       &chan->vblank.notify[i]);
124 		if (ret)
125 			return ret;
126 	}
127 
128 	return 0;
129 }
130 
131 /*******************************************************************************
132  * software engine/subdev functions
133  ******************************************************************************/
134 
135 static const struct nvkm_sw_func
136 nv50_sw = {
137 	.chan_new = nv50_sw_chan_new,
138 	.sclass = {
139 		{ nvkm_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV50 } },
140 		{}
141 	}
142 };
143 
144 int
145 nv50_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
146 {
147 	return nvkm_sw_new_(&nv50_sw, device, index, psw);
148 }
149