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 <core/handle.h>
28 #include <engine/disp.h>
29 #include <engine/fifo/chan.h>
30 #include <subdev/bar.h>
31 
32 #include <nvif/event.h>
33 #include <nvif/ioctl.h>
34 
35 /*******************************************************************************
36  * software context
37  ******************************************************************************/
38 
39 static int
40 nv50_sw_chan_vblsem_release(struct nvkm_notify *notify)
41 {
42 	struct nv50_sw_chan *chan =
43 		container_of(notify, typeof(*chan), vblank.notify[notify->index]);
44 	struct nvkm_sw *sw = chan->base.sw;
45 	struct nvkm_device *device = sw->engine.subdev.device;
46 
47 	nvkm_wr32(device, 0x001704, chan->base.fifo->inst->addr >> 12);
48 	nvkm_wr32(device, 0x001710, 0x80000000 | chan->vblank.ctxdma);
49 	nvkm_bar_flush(device->bar);
50 
51 	if (device->chipset == 0x50) {
52 		nvkm_wr32(device, 0x001570, chan->vblank.offset);
53 		nvkm_wr32(device, 0x001574, chan->vblank.value);
54 	} else {
55 		nvkm_wr32(device, 0x060010, chan->vblank.offset);
56 		nvkm_wr32(device, 0x060014, chan->vblank.value);
57 	}
58 
59 	return NVKM_NOTIFY_DROP;
60 }
61 
62 static bool
63 nv50_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
64 {
65 	struct nv50_sw_chan *chan = nv50_sw_chan(base);
66 	struct nvkm_engine *engine = chan->base.object.engine;
67 	struct nvkm_device *device = engine->subdev.device;
68 	switch (mthd) {
69 	case 0x018c: chan->vblank.ctxdma = data; return true;
70 	case 0x0400: chan->vblank.offset = data; return true;
71 	case 0x0404: chan->vblank.value  = data; return true;
72 	case 0x0408:
73 		if (data < device->disp->vblank.index_nr) {
74 			nvkm_notify_get(&chan->vblank.notify[data]);
75 			return true;
76 		}
77 		break;
78 	default:
79 		break;
80 	}
81 	return false;
82 }
83 
84 void *
85 nv50_sw_chan_dtor(struct nvkm_sw_chan *base)
86 {
87 	struct nv50_sw_chan *chan = nv50_sw_chan(base);
88 	int i;
89 	for (i = 0; i < ARRAY_SIZE(chan->vblank.notify); i++)
90 		nvkm_notify_fini(&chan->vblank.notify[i]);
91 	return chan;
92 }
93 
94 static const struct nvkm_sw_chan_func
95 nv50_sw_chan = {
96 	.dtor = nv50_sw_chan_dtor,
97 	.mthd = nv50_sw_chan_mthd,
98 };
99 
100 static int
101 nv50_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifoch,
102 		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
103 {
104 	struct nvkm_disp *disp = sw->engine.subdev.device->disp;
105 	struct nv50_sw_chan *chan;
106 	int ret, i;
107 
108 	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
109 		return -ENOMEM;
110 	*pobject = &chan->base.object;
111 
112 	ret = nvkm_sw_chan_ctor(&nv50_sw_chan, sw, fifoch, oclass, &chan->base);
113 	if (ret)
114 		return ret;
115 
116 	for (i = 0; disp && i < disp->vblank.index_nr; i++) {
117 		ret = nvkm_notify_init(NULL, &disp->vblank,
118 				       nv50_sw_chan_vblsem_release, false,
119 				       &(struct nvif_notify_head_req_v0) {
120 					.head = i,
121 				       },
122 				       sizeof(struct nvif_notify_head_req_v0),
123 				       sizeof(struct nvif_notify_head_rep_v0),
124 				       &chan->vblank.notify[i]);
125 		if (ret)
126 			return ret;
127 	}
128 
129 	return 0;
130 }
131 
132 /*******************************************************************************
133  * software engine/subdev functions
134  ******************************************************************************/
135 
136 static const struct nvkm_sw_func
137 nv50_sw = {
138 	.chan_new = nv50_sw_chan_new,
139 	.sclass = {
140 		{ nvkm_nvsw_new, { -1, -1, NVIF_IOCTL_NEW_V0_SW_NV50 } },
141 		{}
142 	}
143 };
144 
145 int
146 nv50_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
147 {
148 	return nvkm_sw_new_(&nv50_sw, device, index, psw);
149 }
150