| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 * |
| 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 |
| 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 |
| 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 | |