1 /* $NetBSD: nouveau_engine_fifo_base.c,v 1.5 2016/05/11 02:28:33 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_engine_fifo_base.c,v 1.5 2016/05/11 02:28:33 riastradh Exp $");
29
30 #include <core/client.h>
31 #include <core/object.h>
32 #include <core/handle.h>
33 #include <core/event.h>
34 #include <core/class.h>
35
36 #include <engine/dmaobj.h>
37 #include <engine/fifo.h>
38
39 int
nouveau_fifo_channel_create_(struct nouveau_object * parent,struct nouveau_object * engine,struct nouveau_oclass * oclass,int bar,u32 addr,u32 size,u32 pushbuf,u64 engmask,int len,void ** ptr)40 nouveau_fifo_channel_create_(struct nouveau_object *parent,
41 struct nouveau_object *engine,
42 struct nouveau_oclass *oclass,
43 int bar, u32 addr, u32 size, u32 pushbuf,
44 u64 engmask, int len, void **ptr)
45 {
46 struct nouveau_device *device = nv_device(engine);
47 struct nouveau_fifo *priv = (void *)engine;
48 struct nouveau_fifo_chan *chan;
49 struct nouveau_dmaeng *dmaeng;
50 unsigned long flags;
51 int ret;
52
53 /* create base object class */
54 ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL,
55 engmask, len, ptr);
56 chan = *ptr;
57 if (ret)
58 return ret;
59
60 /* validate dma object representing push buffer */
61 chan->pushdma = (void *)nouveau_handle_ref(parent, pushbuf);
62 if (!chan->pushdma)
63 return -ENOENT;
64
65 dmaeng = (void *)chan->pushdma->base.engine;
66 switch (chan->pushdma->base.oclass->handle) {
67 case NV_DMA_FROM_MEMORY_CLASS:
68 case NV_DMA_IN_MEMORY_CLASS:
69 break;
70 default:
71 return -EINVAL;
72 }
73
74 ret = dmaeng->bind(dmaeng, parent, chan->pushdma, &chan->pushgpu);
75 if (ret)
76 return ret;
77
78 /* find a free fifo channel */
79 spin_lock_irqsave(&priv->lock, flags);
80 for (chan->chid = priv->min; chan->chid < priv->max; chan->chid++) {
81 if (!priv->channel[chan->chid]) {
82 priv->channel[chan->chid] = nv_object(chan);
83 break;
84 }
85 }
86 spin_unlock_irqrestore(&priv->lock, flags);
87
88 if (chan->chid == priv->max) {
89 nv_error(priv, "no free channels\n");
90 return -ENOSPC;
91 }
92
93 /* map fifo control registers */
94 #ifdef __NetBSD__
95 if (bar == 0) {
96 /*
97 * We already map BAR 0 in the engine device base, so
98 * grab a subregion of that.
99 */
100 bus_space_tag_t mmiot = nv_subdev(device)->mmiot;
101 bus_space_handle_t mmioh = nv_subdev(device)->mmioh;
102 bus_size_t mmiosz = nv_subdev(device)->mmiosz;
103
104 /* Check whether it lies inside the region. */
105 if (mmiosz < addr ||
106 mmiosz - addr < chan->chid*size ||
107 mmiosz - addr - chan->chid*size < size) {
108 ret = EIO;
109 nv_error(priv, "fifo channel out of range:"
110 " addr 0x%"PRIxMAX
111 " chid 0x%"PRIxMAX" size 0x%"PRIxMAX
112 " mmiosz 0x%"PRIxMAX"\n",
113 (uintmax_t)addr,
114 (uintmax_t)chan->chid, (uintmax_t)size,
115 (uintmax_t)mmiosz);
116 return ret;
117 }
118
119 /* Grab a subregion. */
120 /* XXX errno NetBSD->Linux */
121 ret = -bus_space_subregion(mmiot, mmioh,
122 (addr + chan->chid*size), size, &chan->bsh);
123 if (ret) {
124 nv_error(priv, "bus_space_subregion failed: %d\n",
125 ret);
126 return ret;
127 }
128
129 /* Success! No need to unmap a subregion. */
130 chan->mapped = false;
131 chan->bst = mmiot;
132 } else {
133 chan->bst = nv_device_resource_tag(device, bar);
134 /* XXX errno NetBSD->Linux */
135 ret = -bus_space_map(chan->bst,
136 (nv_device_resource_start(device, bar) +
137 addr + (chan->chid * size)),
138 size, 0, &chan->bsh);
139 if (ret) {
140 nv_error(priv, "failed to map fifo channel:"
141 " bar %d addr %"PRIxMAX" + %"PRIxMAX
142 " + (%"PRIxMAX" * %"PRIxMAX") = %"PRIxMAX
143 " size %"PRIxMAX": %d\n",
144 bar,
145 (uintmax_t)nv_device_resource_start(device, bar),
146 (uintmax_t)addr,
147 (uintmax_t)chan->chid,
148 (uintmax_t)size,
149 (uintmax_t)(nv_device_resource_start(device, bar) +
150 addr + (chan->chid * size)),
151 (uintmax_t)size,
152 ret);
153 return ret;
154 }
155 chan->mapped = true;
156 }
157 #else
158 chan->user = ioremap(nv_device_resource_start(device, bar) + addr +
159 (chan->chid * size), size);
160 if (!chan->user)
161 return -EFAULT;
162 #endif
163
164 nouveau_event_trigger(priv->cevent, 0);
165
166 chan->size = size;
167 return 0;
168 }
169
170 void
nouveau_fifo_channel_destroy(struct nouveau_fifo_chan * chan)171 nouveau_fifo_channel_destroy(struct nouveau_fifo_chan *chan)
172 {
173 struct nouveau_fifo *priv = (void *)nv_object(chan)->engine;
174 unsigned long flags;
175
176 #ifdef __NetBSD__
177 if (chan->mapped) {
178 bus_space_unmap(chan->bst, chan->bsh, chan->size);
179 chan->mapped = false;
180 }
181 #else
182 iounmap(chan->user);
183 #endif
184
185 spin_lock_irqsave(&priv->lock, flags);
186 priv->channel[chan->chid] = NULL;
187 spin_unlock_irqrestore(&priv->lock, flags);
188
189 nouveau_gpuobj_ref(NULL, &chan->pushgpu);
190 nouveau_object_ref(NULL, (struct nouveau_object **)&chan->pushdma);
191 nouveau_namedb_destroy(&chan->base);
192 }
193
194 void
_nouveau_fifo_channel_dtor(struct nouveau_object * object)195 _nouveau_fifo_channel_dtor(struct nouveau_object *object)
196 {
197 struct nouveau_fifo_chan *chan = (void *)object;
198 nouveau_fifo_channel_destroy(chan);
199 }
200
201 u32
_nouveau_fifo_channel_rd32(struct nouveau_object * object,u64 addr)202 _nouveau_fifo_channel_rd32(struct nouveau_object *object, u64 addr)
203 {
204 struct nouveau_fifo_chan *chan = (void *)object;
205 #ifdef __NetBSD__
206 return bus_space_read_4(chan->bst, chan->bsh, addr);
207 #else
208 return ioread32_native(chan->user + addr);
209 #endif
210 }
211
212 void
_nouveau_fifo_channel_wr32(struct nouveau_object * object,u64 addr,u32 data)213 _nouveau_fifo_channel_wr32(struct nouveau_object *object, u64 addr, u32 data)
214 {
215 struct nouveau_fifo_chan *chan = (void *)object;
216 #ifdef __NetBSD__
217 bus_space_write_4(chan->bst, chan->bsh, addr, data);
218 #else
219 iowrite32_native(data, chan->user + addr);
220 #endif
221 }
222
223 static int
nouveau_fifo_chid(struct nouveau_fifo * priv,struct nouveau_object * object)224 nouveau_fifo_chid(struct nouveau_fifo *priv, struct nouveau_object *object)
225 {
226 int engidx = nv_hclass(priv) & 0xff;
227
228 while (object && object->parent) {
229 if ( nv_iclass(object->parent, NV_ENGCTX_CLASS) &&
230 (nv_hclass(object->parent) & 0xff) == engidx)
231 return nouveau_fifo_chan(object)->chid;
232 object = object->parent;
233 }
234
235 return -1;
236 }
237
238 const char *
nouveau_client_name_for_fifo_chid(struct nouveau_fifo * fifo,u32 chid)239 nouveau_client_name_for_fifo_chid(struct nouveau_fifo *fifo, u32 chid)
240 {
241 struct nouveau_fifo_chan *chan = NULL;
242 unsigned long flags;
243
244 spin_lock_irqsave(&fifo->lock, flags);
245 if (chid >= fifo->min && chid <= fifo->max)
246 chan = (void *)fifo->channel[chid];
247 spin_unlock_irqrestore(&fifo->lock, flags);
248
249 return nouveau_client_name(chan);
250 }
251
252 void
nouveau_fifo_destroy(struct nouveau_fifo * priv)253 nouveau_fifo_destroy(struct nouveau_fifo *priv)
254 {
255 kfree(priv->channel);
256 nouveau_event_destroy(&priv->uevent);
257 nouveau_event_destroy(&priv->cevent);
258 nouveau_engine_destroy(&priv->base);
259 }
260
261 int
nouveau_fifo_create_(struct nouveau_object * parent,struct nouveau_object * engine,struct nouveau_oclass * oclass,int min,int max,int length,void ** pobject)262 nouveau_fifo_create_(struct nouveau_object *parent,
263 struct nouveau_object *engine,
264 struct nouveau_oclass *oclass,
265 int min, int max, int length, void **pobject)
266 {
267 struct nouveau_fifo *priv;
268 int ret;
269
270 ret = nouveau_engine_create_(parent, engine, oclass, true, "PFIFO",
271 "fifo", length, pobject);
272 priv = *pobject;
273 if (ret)
274 return ret;
275
276 priv->min = min;
277 priv->max = max;
278 priv->channel = kzalloc(sizeof(*priv->channel) * (max + 1), GFP_KERNEL);
279 if (!priv->channel)
280 return -ENOMEM;
281
282 ret = nouveau_event_create(1, &priv->cevent);
283 if (ret)
284 return ret;
285
286 ret = nouveau_event_create(1, &priv->uevent);
287 if (ret)
288 return ret;
289
290 priv->chid = nouveau_fifo_chid;
291 spin_lock_init(&priv->lock);
292 return 0;
293 }
294