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 "channv04.h"
25 #include "regsnv04.h"
26
27 #include <core/client.h>
28 #include <core/ramht.h>
29 #include <subdev/instmem.h>
30
31 #include <nvif/class.h>
32 #include <nvif/cl006b.h>
33 #include <nvif/unpack.h>
34
35 void
nv04_fifo_dma_object_dtor(struct nvkm_fifo_chan * base,int cookie)36 nv04_fifo_dma_object_dtor(struct nvkm_fifo_chan *base, int cookie)
37 {
38 struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
39 struct nvkm_instmem *imem = chan->fifo->base.engine.subdev.device->imem;
40
41 mutex_lock(&chan->fifo->base.mutex);
42 nvkm_ramht_remove(imem->ramht, cookie);
43 mutex_unlock(&chan->fifo->base.mutex);
44 }
45
46 static int
nv04_fifo_dma_object_ctor(struct nvkm_fifo_chan * base,struct nvkm_object * object)47 nv04_fifo_dma_object_ctor(struct nvkm_fifo_chan *base,
48 struct nvkm_object *object)
49 {
50 struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
51 struct nvkm_instmem *imem = chan->fifo->base.engine.subdev.device->imem;
52 u32 context = 0x80000000 | chan->base.chid << 24;
53 u32 handle = object->handle;
54 int hash;
55
56 switch (object->engine->subdev.type) {
57 case NVKM_ENGINE_DMAOBJ:
58 case NVKM_ENGINE_SW : context |= 0x00000000; break;
59 case NVKM_ENGINE_GR : context |= 0x00010000; break;
60 case NVKM_ENGINE_MPEG : context |= 0x00020000; break;
61 default:
62 WARN_ON(1);
63 return -EINVAL;
64 }
65
66 mutex_lock(&chan->fifo->base.mutex);
67 hash = nvkm_ramht_insert(imem->ramht, object, chan->base.chid, 4,
68 handle, context);
69 mutex_unlock(&chan->fifo->base.mutex);
70 return hash;
71 }
72
73 void
nv04_fifo_dma_fini(struct nvkm_fifo_chan * base)74 nv04_fifo_dma_fini(struct nvkm_fifo_chan *base)
75 {
76 struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
77 struct nv04_fifo *fifo = chan->fifo;
78 struct nvkm_device *device = fifo->base.engine.subdev.device;
79 struct nvkm_memory *fctx = device->imem->ramfc;
80 const struct nv04_fifo_ramfc *c;
81 unsigned long flags;
82 u32 mask = fifo->base.nr - 1;
83 u32 data = chan->ramfc;
84 u32 chid;
85
86 /* prevent fifo context switches */
87 spin_lock_irqsave(&fifo->base.lock, flags);
88 nvkm_wr32(device, NV03_PFIFO_CACHES, 0);
89
90 /* if this channel is active, replace it with a null context */
91 chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & mask;
92 if (chid == chan->base.chid) {
93 nvkm_mask(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0x00000001, 0);
94 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 0);
95 nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0);
96
97 c = fifo->ramfc;
98 nvkm_kmap(fctx);
99 do {
100 u32 rm = ((1ULL << c->bits) - 1) << c->regs;
101 u32 cm = ((1ULL << c->bits) - 1) << c->ctxs;
102 u32 rv = (nvkm_rd32(device, c->regp) & rm) >> c->regs;
103 u32 cv = (nvkm_ro32(fctx, c->ctxp + data) & ~cm);
104 nvkm_wo32(fctx, c->ctxp + data, cv | (rv << c->ctxs));
105 } while ((++c)->bits);
106 nvkm_done(fctx);
107
108 c = fifo->ramfc;
109 do {
110 nvkm_wr32(device, c->regp, 0x00000000);
111 } while ((++c)->bits);
112
113 nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, 0);
114 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUT, 0);
115 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, mask);
116 nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1);
117 nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1);
118 }
119
120 /* restore normal operation, after disabling dma mode */
121 nvkm_mask(device, NV04_PFIFO_MODE, 1 << chan->base.chid, 0);
122 nvkm_wr32(device, NV03_PFIFO_CACHES, 1);
123 spin_unlock_irqrestore(&fifo->base.lock, flags);
124 }
125
126 void
nv04_fifo_dma_init(struct nvkm_fifo_chan * base)127 nv04_fifo_dma_init(struct nvkm_fifo_chan *base)
128 {
129 struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
130 struct nv04_fifo *fifo = chan->fifo;
131 struct nvkm_device *device = fifo->base.engine.subdev.device;
132 u32 mask = 1 << chan->base.chid;
133 unsigned long flags;
134 spin_lock_irqsave(&fifo->base.lock, flags);
135 nvkm_mask(device, NV04_PFIFO_MODE, mask, mask);
136 spin_unlock_irqrestore(&fifo->base.lock, flags);
137 }
138
139 void *
nv04_fifo_dma_dtor(struct nvkm_fifo_chan * base)140 nv04_fifo_dma_dtor(struct nvkm_fifo_chan *base)
141 {
142 struct nv04_fifo_chan *chan = nv04_fifo_chan(base);
143 struct nv04_fifo *fifo = chan->fifo;
144 struct nvkm_instmem *imem = fifo->base.engine.subdev.device->imem;
145 const struct nv04_fifo_ramfc *c = fifo->ramfc;
146
147 nvkm_kmap(imem->ramfc);
148 do {
149 nvkm_wo32(imem->ramfc, chan->ramfc + c->ctxp, 0x00000000);
150 } while ((++c)->bits);
151 nvkm_done(imem->ramfc);
152 return chan;
153 }
154
155 const struct nvkm_fifo_chan_func
156 nv04_fifo_dma_func = {
157 .dtor = nv04_fifo_dma_dtor,
158 .init = nv04_fifo_dma_init,
159 .fini = nv04_fifo_dma_fini,
160 .object_ctor = nv04_fifo_dma_object_ctor,
161 .object_dtor = nv04_fifo_dma_object_dtor,
162 };
163
164 static int
nv04_fifo_dma_new(struct nvkm_fifo * base,const struct nvkm_oclass * oclass,void * data,u32 size,struct nvkm_object ** pobject)165 nv04_fifo_dma_new(struct nvkm_fifo *base, const struct nvkm_oclass *oclass,
166 void *data, u32 size, struct nvkm_object **pobject)
167 {
168 struct nvkm_object *parent = oclass->parent;
169 union {
170 struct nv03_channel_dma_v0 v0;
171 } *args = data;
172 struct nv04_fifo *fifo = nv04_fifo(base);
173 struct nv04_fifo_chan *chan = NULL;
174 struct nvkm_device *device = fifo->base.engine.subdev.device;
175 struct nvkm_instmem *imem = device->imem;
176 int ret = -ENOSYS;
177
178 nvif_ioctl(parent, "create channel dma size %d\n", size);
179 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
180 nvif_ioctl(parent, "create channel dma vers %d pushbuf %llx "
181 "offset %08x\n", args->v0.version,
182 args->v0.pushbuf, args->v0.offset);
183 if (!args->v0.pushbuf)
184 return -EINVAL;
185 } else
186 return ret;
187
188 if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
189 return -ENOMEM;
190 *pobject = &chan->base.object;
191
192 ret = nvkm_fifo_chan_ctor(&nv04_fifo_dma_func, &fifo->base,
193 0x1000, 0x1000, false, 0, args->v0.pushbuf,
194 BIT(NV04_FIFO_ENGN_SW) |
195 BIT(NV04_FIFO_ENGN_GR) |
196 BIT(NV04_FIFO_ENGN_DMA),
197 0, 0x800000, 0x10000, oclass, &chan->base);
198 chan->fifo = fifo;
199 if (ret)
200 return ret;
201
202 args->v0.chid = chan->base.chid;
203 chan->ramfc = chan->base.chid * 32;
204
205 nvkm_kmap(imem->ramfc);
206 nvkm_wo32(imem->ramfc, chan->ramfc + 0x00, args->v0.offset);
207 nvkm_wo32(imem->ramfc, chan->ramfc + 0x04, args->v0.offset);
208 nvkm_wo32(imem->ramfc, chan->ramfc + 0x08, chan->base.push->addr >> 4);
209 nvkm_wo32(imem->ramfc, chan->ramfc + 0x10,
210 NV_PFIFO_CACHE1_DMA_FETCH_TRIG_128_BYTES |
211 NV_PFIFO_CACHE1_DMA_FETCH_SIZE_128_BYTES |
212 #ifdef __BIG_ENDIAN
213 NV_PFIFO_CACHE1_BIG_ENDIAN |
214 #endif
215 NV_PFIFO_CACHE1_DMA_FETCH_MAX_REQS_8);
216 nvkm_done(imem->ramfc);
217 return 0;
218 }
219
220 const struct nvkm_fifo_chan_oclass
221 nv04_fifo_dma_oclass = {
222 .base.oclass = NV03_CHANNEL_DMA,
223 .base.minver = 0,
224 .base.maxver = 0,
225 .ctor = nv04_fifo_dma_new,
226 };
227