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 #include "channv50.h"
26 
27 #include <core/gpuobj.h>
28 
29 static void
30 nv50_fifo_runlist_update_locked(struct nv50_fifo *fifo)
31 {
32 	struct nvkm_device *device = fifo->base.engine.subdev.device;
33 	struct nvkm_memory *cur;
34 	int i, p;
35 
36 	cur = fifo->runlist[fifo->cur_runlist];
37 	fifo->cur_runlist = !fifo->cur_runlist;
38 
39 	nvkm_kmap(cur);
40 	for (i = 0, p = 0; i < fifo->base.nr; i++) {
41 		if (nvkm_rd32(device, 0x002600 + (i * 4)) & 0x80000000)
42 			nvkm_wo32(cur, p++ * 4, i);
43 	}
44 	nvkm_done(cur);
45 
46 	nvkm_wr32(device, 0x0032f4, nvkm_memory_addr(cur) >> 12);
47 	nvkm_wr32(device, 0x0032ec, p);
48 	nvkm_wr32(device, 0x002500, 0x00000101);
49 }
50 
51 void
52 nv50_fifo_runlist_update(struct nv50_fifo *fifo)
53 {
54 	mutex_lock(&fifo->base.mutex);
55 	nv50_fifo_runlist_update_locked(fifo);
56 	mutex_unlock(&fifo->base.mutex);
57 }
58 
59 int
60 nv50_fifo_oneinit(struct nvkm_fifo *base)
61 {
62 	struct nv50_fifo *fifo = nv50_fifo(base);
63 	struct nvkm_device *device = fifo->base.engine.subdev.device;
64 	int ret;
65 
66 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, 128 * 4, 0x1000,
67 			      false, &fifo->runlist[0]);
68 	if (ret)
69 		return ret;
70 
71 	return nvkm_memory_new(device, NVKM_MEM_TARGET_INST, 128 * 4, 0x1000,
72 			       false, &fifo->runlist[1]);
73 }
74 
75 void
76 nv50_fifo_init(struct nvkm_fifo *base)
77 {
78 	struct nv50_fifo *fifo = nv50_fifo(base);
79 	struct nvkm_device *device = fifo->base.engine.subdev.device;
80 	int i;
81 
82 	nvkm_mask(device, 0x000200, 0x00000100, 0x00000000);
83 	nvkm_mask(device, 0x000200, 0x00000100, 0x00000100);
84 	nvkm_wr32(device, 0x00250c, 0x6f3cfc34);
85 	nvkm_wr32(device, 0x002044, 0x01003fff);
86 
87 	nvkm_wr32(device, 0x002100, 0xffffffff);
88 	nvkm_wr32(device, 0x002140, 0xbfffffff);
89 
90 	for (i = 0; i < 128; i++)
91 		nvkm_wr32(device, 0x002600 + (i * 4), 0x00000000);
92 	nv50_fifo_runlist_update_locked(fifo);
93 
94 	nvkm_wr32(device, 0x003200, 0x00000001);
95 	nvkm_wr32(device, 0x003250, 0x00000001);
96 	nvkm_wr32(device, 0x002500, 0x00000001);
97 }
98 
99 void *
100 nv50_fifo_dtor(struct nvkm_fifo *base)
101 {
102 	struct nv50_fifo *fifo = nv50_fifo(base);
103 	nvkm_memory_unref(&fifo->runlist[1]);
104 	nvkm_memory_unref(&fifo->runlist[0]);
105 	return fifo;
106 }
107 
108 int
109 nv50_fifo_new_(const struct nvkm_fifo_func *func, struct nvkm_device *device,
110 	       enum nvkm_subdev_type type, int inst, struct nvkm_fifo **pfifo)
111 {
112 	struct nv50_fifo *fifo;
113 	int ret;
114 
115 	if (!(fifo = kzalloc(sizeof(*fifo), GFP_KERNEL)))
116 		return -ENOMEM;
117 	*pfifo = &fifo->base;
118 
119 	ret = nvkm_fifo_ctor(func, device, type, inst, 128, &fifo->base);
120 	if (ret)
121 		return ret;
122 
123 	set_bit(0, fifo->base.mask); /* PIO channel */
124 	set_bit(127, fifo->base.mask); /* inactive channel */
125 	return 0;
126 }
127 
128 static const struct nvkm_fifo_func
129 nv50_fifo = {
130 	.dtor = nv50_fifo_dtor,
131 	.oneinit = nv50_fifo_oneinit,
132 	.init = nv50_fifo_init,
133 	.intr = nv04_fifo_intr,
134 	.engine_id = nv04_fifo_engine_id,
135 	.id_engine = nv04_fifo_id_engine,
136 	.pause = nv04_fifo_pause,
137 	.start = nv04_fifo_start,
138 	.chan = {
139 		&nv50_fifo_gpfifo_oclass,
140 		NULL
141 	},
142 };
143 
144 int
145 nv50_fifo_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
146 	      struct nvkm_fifo **pfifo)
147 {
148 	return nv50_fifo_new_(&nv50_fifo, device, type, inst, pfifo);
149 }
150