Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 Google, Inc. |
Duy Truong | 790f06d | 2013-02-13 16:38:12 -0800 | [diff] [blame] | 3 | * Copyright (c) 2009, The Linux Foundation. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 4 | * Author: Iliyan Malchev <ibm@android.com> |
| 5 | * |
| 6 | * This software is licensed under the terms of the GNU General Public |
| 7 | * License version 2, as published by the Free Software Foundation, and |
| 8 | * may be copied, distributed, and modified under those terms. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/cdev.h> |
| 18 | #include <linux/fs.h> |
| 19 | #include <linux/list.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/uaccess.h> |
| 23 | #include <linux/msm_adsp.h> |
| 24 | #include <linux/android_pmem.h> |
Steve Muckle | f132c6c | 2012-06-06 18:30:57 -0700 | [diff] [blame] | 25 | #include <linux/export.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 26 | #include "adsp.h" |
| 27 | #include <mach/debug_mm.h> |
| 28 | #include <linux/slab.h> |
| 29 | |
| 30 | struct adsp_pmem_info { |
| 31 | int fd; |
| 32 | void *vaddr; |
| 33 | }; |
| 34 | |
| 35 | struct adsp_pmem_region { |
| 36 | struct hlist_node list; |
| 37 | void *vaddr; |
| 38 | unsigned long paddr; |
| 39 | unsigned long kvaddr; |
| 40 | unsigned long len; |
| 41 | struct file *file; |
| 42 | }; |
| 43 | |
| 44 | struct adsp_device { |
| 45 | struct msm_adsp_module *module; |
| 46 | |
| 47 | spinlock_t event_queue_lock; |
| 48 | wait_queue_head_t event_wait; |
| 49 | struct list_head event_queue; |
| 50 | int abort; |
| 51 | |
| 52 | const char *name; |
| 53 | struct device *device; |
| 54 | struct cdev cdev; |
| 55 | }; |
| 56 | |
| 57 | static struct adsp_device *inode_to_device(struct inode *inode); |
| 58 | |
| 59 | #define __CONTAINS(r, v, l) ({ \ |
| 60 | typeof(r) __r = r; \ |
| 61 | typeof(v) __v = v; \ |
| 62 | typeof(v) __e = __v + l; \ |
| 63 | int res = __v >= __r->vaddr && \ |
| 64 | __e <= __r->vaddr + __r->len; \ |
| 65 | res; \ |
| 66 | }) |
| 67 | |
| 68 | #define CONTAINS(r1, r2) ({ \ |
| 69 | typeof(r2) __r2 = r2; \ |
| 70 | __CONTAINS(r1, __r2->vaddr, __r2->len); \ |
| 71 | }) |
| 72 | |
| 73 | #define IN_RANGE(r, v) ({ \ |
| 74 | typeof(r) __r = r; \ |
| 75 | typeof(v) __vv = v; \ |
| 76 | int res = ((__vv >= __r->vaddr) && \ |
| 77 | (__vv < (__r->vaddr + __r->len))); \ |
| 78 | res; \ |
| 79 | }) |
| 80 | |
| 81 | #define OVERLAPS(r1, r2) ({ \ |
| 82 | typeof(r1) __r1 = r1; \ |
| 83 | typeof(r2) __r2 = r2; \ |
| 84 | typeof(__r2->vaddr) __v = __r2->vaddr; \ |
| 85 | typeof(__v) __e = __v + __r2->len - 1; \ |
| 86 | int res = (IN_RANGE(__r1, __v) || IN_RANGE(__r1, __e)); \ |
| 87 | res; \ |
| 88 | }) |
| 89 | |
| 90 | static int adsp_pmem_check(struct msm_adsp_module *module, |
| 91 | void *vaddr, unsigned long len) |
| 92 | { |
| 93 | struct adsp_pmem_region *region_elt; |
| 94 | struct hlist_node *node; |
| 95 | struct adsp_pmem_region t = { .vaddr = vaddr, .len = len }; |
| 96 | |
| 97 | hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { |
| 98 | if (CONTAINS(region_elt, &t) || CONTAINS(&t, region_elt) || |
| 99 | OVERLAPS(region_elt, &t)) { |
| 100 | MM_ERR("module %s:" |
| 101 | " region (vaddr %p len %ld)" |
| 102 | " clashes with registered region" |
| 103 | " (vaddr %p paddr %p len %ld)\n", |
| 104 | module->name, |
| 105 | vaddr, len, |
| 106 | region_elt->vaddr, |
| 107 | (void *)region_elt->paddr, |
| 108 | region_elt->len); |
| 109 | return -EINVAL; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static int adsp_pmem_add(struct msm_adsp_module *module, |
| 117 | struct adsp_pmem_info *info) |
| 118 | { |
| 119 | unsigned long paddr, kvaddr, len; |
| 120 | struct file *file; |
| 121 | struct adsp_pmem_region *region; |
| 122 | int rc = -EINVAL; |
| 123 | |
| 124 | mutex_lock(&module->pmem_regions_lock); |
| 125 | region = kmalloc(sizeof(*region), GFP_KERNEL); |
| 126 | if (!region) { |
| 127 | rc = -ENOMEM; |
| 128 | goto end; |
| 129 | } |
| 130 | INIT_HLIST_NODE(®ion->list); |
| 131 | if (get_pmem_file(info->fd, &paddr, &kvaddr, &len, &file)) { |
| 132 | kfree(region); |
| 133 | goto end; |
| 134 | } |
| 135 | |
| 136 | rc = adsp_pmem_check(module, info->vaddr, len); |
| 137 | if (rc < 0) { |
| 138 | put_pmem_file(file); |
| 139 | kfree(region); |
| 140 | goto end; |
| 141 | } |
| 142 | |
| 143 | region->vaddr = info->vaddr; |
| 144 | region->paddr = paddr; |
| 145 | region->kvaddr = kvaddr; |
| 146 | region->len = len; |
| 147 | region->file = file; |
| 148 | |
| 149 | hlist_add_head(®ion->list, &module->pmem_regions); |
| 150 | end: |
| 151 | mutex_unlock(&module->pmem_regions_lock); |
| 152 | return rc; |
| 153 | } |
| 154 | |
| 155 | static int adsp_pmem_lookup_vaddr(struct msm_adsp_module *module, void **addr, |
| 156 | unsigned long len, struct adsp_pmem_region **region) |
| 157 | { |
| 158 | struct hlist_node *node; |
| 159 | void *vaddr = *addr; |
| 160 | struct adsp_pmem_region *region_elt; |
| 161 | |
| 162 | int match_count = 0; |
| 163 | |
| 164 | *region = NULL; |
| 165 | |
| 166 | /* returns physical address or zero */ |
| 167 | hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { |
| 168 | if (vaddr >= region_elt->vaddr && |
| 169 | vaddr < region_elt->vaddr + region_elt->len && |
| 170 | vaddr + len <= region_elt->vaddr + region_elt->len) { |
| 171 | /* offset since we could pass vaddr inside a registerd |
| 172 | * pmem buffer |
| 173 | */ |
| 174 | |
| 175 | match_count++; |
| 176 | if (!*region) |
| 177 | *region = region_elt; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | if (match_count > 1) { |
| 182 | MM_ERR("module %s: " |
| 183 | "multiple hits for vaddr %p, len %ld\n", |
| 184 | module->name, vaddr, len); |
| 185 | hlist_for_each_entry(region_elt, node, |
| 186 | &module->pmem_regions, list) { |
| 187 | if (vaddr >= region_elt->vaddr && |
| 188 | vaddr < region_elt->vaddr + region_elt->len && |
| 189 | vaddr + len <= region_elt->vaddr + region_elt->len) |
| 190 | MM_ERR("%p, %ld --> %p\n", |
| 191 | region_elt->vaddr, |
| 192 | region_elt->len, |
| 193 | (void *)region_elt->paddr); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | return *region ? 0 : -1; |
| 198 | } |
| 199 | |
| 200 | int adsp_pmem_fixup_kvaddr(struct msm_adsp_module *module, void **addr, |
| 201 | unsigned long *kvaddr, unsigned long len) |
| 202 | { |
| 203 | struct adsp_pmem_region *region; |
| 204 | void *vaddr = *addr; |
| 205 | unsigned long *paddr = (unsigned long *)addr; |
| 206 | int ret; |
| 207 | |
| 208 | ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); |
| 209 | if (ret) { |
| 210 | MM_ERR("not patching %s (paddr & kvaddr)," |
| 211 | " lookup (%p, %ld) failed\n", |
| 212 | module->name, vaddr, len); |
| 213 | return ret; |
| 214 | } |
| 215 | *paddr = region->paddr + (vaddr - region->vaddr); |
| 216 | *kvaddr = region->kvaddr + (vaddr - region->vaddr); |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | int adsp_pmem_fixup(struct msm_adsp_module *module, void **addr, |
| 221 | unsigned long len) |
| 222 | { |
| 223 | struct adsp_pmem_region *region; |
| 224 | void *vaddr = *addr; |
| 225 | unsigned long *paddr = (unsigned long *)addr; |
| 226 | int ret; |
| 227 | |
| 228 | ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); |
| 229 | if (ret) { |
| 230 | MM_ERR("not patching %s, lookup (%p, %ld) failed\n", |
| 231 | module->name, vaddr, len); |
| 232 | return ret; |
| 233 | } |
| 234 | |
| 235 | *paddr = region->paddr + (vaddr - region->vaddr); |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int adsp_verify_cmd(struct msm_adsp_module *module, |
| 240 | unsigned int queue_id, void *cmd_data, |
| 241 | size_t cmd_size) |
| 242 | { |
| 243 | /* call the per module verifier */ |
| 244 | if (module->verify_cmd) |
| 245 | return module->verify_cmd(module, queue_id, cmd_data, |
| 246 | cmd_size); |
| 247 | else |
| 248 | MM_INFO("no packet verifying function " |
| 249 | "for task %s\n", module->name); |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static long adsp_write_cmd(struct adsp_device *adev, void __user *arg) |
| 254 | { |
| 255 | struct adsp_command_t cmd; |
| 256 | unsigned char buf[256]; |
| 257 | void *cmd_data; |
| 258 | long rc; |
| 259 | |
| 260 | if (copy_from_user(&cmd, (void __user *)arg, sizeof(cmd))) |
| 261 | return -EFAULT; |
| 262 | |
| 263 | if (cmd.len > 256) { |
| 264 | cmd_data = kmalloc(cmd.len, GFP_USER); |
| 265 | if (!cmd_data) |
| 266 | return -ENOMEM; |
| 267 | } else { |
| 268 | cmd_data = buf; |
| 269 | } |
| 270 | |
| 271 | if (copy_from_user(cmd_data, (void __user *)(cmd.data), cmd.len)) { |
| 272 | rc = -EFAULT; |
| 273 | goto end; |
| 274 | } |
| 275 | |
| 276 | mutex_lock(&adev->module->pmem_regions_lock); |
| 277 | if (adsp_verify_cmd(adev->module, cmd.queue, cmd_data, cmd.len)) { |
| 278 | MM_ERR("module %s: verify failed.\n", adev->module->name); |
| 279 | rc = -EINVAL; |
| 280 | goto end; |
| 281 | } |
| 282 | rc = msm_adsp_write(adev->module, cmd.queue, cmd_data, cmd.len); |
| 283 | end: |
| 284 | mutex_unlock(&adev->module->pmem_regions_lock); |
| 285 | |
| 286 | if (cmd.len > 256) |
| 287 | kfree(cmd_data); |
| 288 | |
| 289 | return rc; |
| 290 | } |
| 291 | |
| 292 | static int adsp_events_pending(struct adsp_device *adev) |
| 293 | { |
| 294 | unsigned long flags; |
| 295 | int yes; |
| 296 | spin_lock_irqsave(&adev->event_queue_lock, flags); |
| 297 | yes = !list_empty(&adev->event_queue); |
| 298 | spin_unlock_irqrestore(&adev->event_queue_lock, flags); |
| 299 | return yes || adev->abort; |
| 300 | } |
| 301 | |
| 302 | static int adsp_pmem_lookup_paddr(struct msm_adsp_module *module, void **addr, |
| 303 | struct adsp_pmem_region **region) |
| 304 | { |
| 305 | struct hlist_node *node; |
| 306 | unsigned long paddr = (unsigned long)(*addr); |
| 307 | struct adsp_pmem_region *region_elt; |
| 308 | |
| 309 | hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { |
| 310 | if (paddr >= region_elt->paddr && |
| 311 | paddr < region_elt->paddr + region_elt->len) { |
| 312 | *region = region_elt; |
| 313 | return 0; |
| 314 | } |
| 315 | } |
| 316 | return -1; |
| 317 | } |
| 318 | |
| 319 | int adsp_pmem_paddr_fixup(struct msm_adsp_module *module, void **addr) |
| 320 | { |
| 321 | struct adsp_pmem_region *region; |
| 322 | unsigned long paddr = (unsigned long)(*addr); |
| 323 | unsigned long *vaddr = (unsigned long *)addr; |
| 324 | int ret; |
| 325 | |
| 326 | ret = adsp_pmem_lookup_paddr(module, addr, ®ion); |
| 327 | if (ret) { |
| 328 | MM_ERR("not patching %s, paddr %p lookup failed\n", |
| 329 | module->name, vaddr); |
| 330 | return ret; |
| 331 | } |
| 332 | |
| 333 | *vaddr = (unsigned long)region->vaddr + (paddr - region->paddr); |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static int adsp_patch_event(struct msm_adsp_module *module, |
| 338 | struct adsp_event *event) |
| 339 | { |
| 340 | /* call the per-module msg verifier */ |
| 341 | if (module->patch_event) |
| 342 | return module->patch_event(module, event); |
| 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | static long adsp_get_event(struct adsp_device *adev, void __user *arg) |
| 347 | { |
| 348 | unsigned long flags; |
| 349 | struct adsp_event *data = NULL; |
| 350 | struct adsp_event_t evt; |
| 351 | int timeout; |
| 352 | long rc = 0; |
| 353 | |
| 354 | if (copy_from_user(&evt, arg, sizeof(struct adsp_event_t))) |
| 355 | return -EFAULT; |
| 356 | |
| 357 | timeout = (int)evt.timeout_ms; |
| 358 | |
| 359 | if (timeout > 0) { |
| 360 | rc = wait_event_interruptible_timeout( |
| 361 | adev->event_wait, adsp_events_pending(adev), |
| 362 | msecs_to_jiffies(timeout)); |
| 363 | if (rc == 0) |
| 364 | return -ETIMEDOUT; |
| 365 | } else { |
| 366 | rc = wait_event_interruptible( |
| 367 | adev->event_wait, adsp_events_pending(adev)); |
| 368 | } |
| 369 | if (rc < 0) |
| 370 | return rc; |
| 371 | |
| 372 | if (adev->abort) |
| 373 | return -ENODEV; |
| 374 | |
| 375 | spin_lock_irqsave(&adev->event_queue_lock, flags); |
| 376 | if (!list_empty(&adev->event_queue)) { |
| 377 | data = list_first_entry(&adev->event_queue, |
| 378 | struct adsp_event, list); |
| 379 | list_del(&data->list); |
| 380 | } |
| 381 | spin_unlock_irqrestore(&adev->event_queue_lock, flags); |
| 382 | |
| 383 | if (!data) |
| 384 | return -EAGAIN; |
| 385 | |
| 386 | /* DSP messages are type 0; they may contain physical addresses */ |
| 387 | if (data->type == 0) |
| 388 | adsp_patch_event(adev->module, data); |
| 389 | |
| 390 | /* map adsp_event --> adsp_event_t */ |
| 391 | if (evt.len < data->size) { |
| 392 | rc = -ETOOSMALL; |
| 393 | goto end; |
| 394 | } |
| 395 | if (data->msg_id != EVENT_MSG_ID) { |
| 396 | if (copy_to_user((void *)(evt.data), data->data.msg16, |
| 397 | data->size)) { |
| 398 | rc = -EFAULT; |
| 399 | goto end; |
| 400 | } |
| 401 | } else { |
| 402 | if (copy_to_user((void *)(evt.data), data->data.msg32, |
| 403 | data->size)) { |
| 404 | rc = -EFAULT; |
| 405 | goto end; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | evt.type = data->type; /* 0 --> from aDSP, 1 --> from ARM9 */ |
| 410 | evt.msg_id = data->msg_id; |
| 411 | evt.flags = data->is16; |
| 412 | evt.len = data->size; |
| 413 | if (copy_to_user(arg, &evt, sizeof(evt))) |
| 414 | rc = -EFAULT; |
| 415 | end: |
| 416 | kfree(data); |
| 417 | return rc; |
| 418 | } |
| 419 | |
| 420 | static int adsp_pmem_del(struct msm_adsp_module *module) |
| 421 | { |
| 422 | struct hlist_node *node, *tmp; |
| 423 | struct adsp_pmem_region *region; |
| 424 | |
| 425 | mutex_lock(&module->pmem_regions_lock); |
| 426 | hlist_for_each_safe(node, tmp, &module->pmem_regions) { |
| 427 | region = hlist_entry(node, struct adsp_pmem_region, list); |
| 428 | hlist_del(node); |
| 429 | put_pmem_file(region->file); |
| 430 | kfree(region); |
| 431 | } |
| 432 | mutex_unlock(&module->pmem_regions_lock); |
| 433 | BUG_ON(!hlist_empty(&module->pmem_regions)); |
| 434 | |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | static long adsp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 439 | { |
| 440 | struct adsp_device *adev = filp->private_data; |
| 441 | |
| 442 | switch (cmd) { |
| 443 | case ADSP_IOCTL_ENABLE: |
| 444 | return msm_adsp_enable(adev->module); |
| 445 | |
| 446 | case ADSP_IOCTL_DISABLE: |
| 447 | return msm_adsp_disable(adev->module); |
| 448 | |
| 449 | case ADSP_IOCTL_DISABLE_EVENT_RSP: |
| 450 | return msm_adsp_disable_event_rsp(adev->module); |
| 451 | |
| 452 | case ADSP_IOCTL_DISABLE_ACK: |
| 453 | MM_ERR("ADSP_IOCTL_DISABLE_ACK is not implemented\n"); |
| 454 | break; |
| 455 | |
| 456 | case ADSP_IOCTL_WRITE_COMMAND: |
| 457 | return adsp_write_cmd(adev, (void __user *) arg); |
| 458 | |
| 459 | case ADSP_IOCTL_GET_EVENT: |
| 460 | return adsp_get_event(adev, (void __user *) arg); |
| 461 | |
| 462 | case ADSP_IOCTL_SET_CLKRATE: { |
| 463 | unsigned long clk_rate; |
| 464 | if (copy_from_user(&clk_rate, (void *) arg, sizeof(clk_rate))) |
| 465 | return -EFAULT; |
| 466 | return adsp_set_clkrate(adev->module, clk_rate); |
| 467 | } |
| 468 | |
| 469 | case ADSP_IOCTL_REGISTER_PMEM: { |
| 470 | struct adsp_pmem_info info; |
| 471 | if (copy_from_user(&info, (void *) arg, sizeof(info))) |
| 472 | return -EFAULT; |
| 473 | return adsp_pmem_add(adev->module, &info); |
| 474 | } |
| 475 | |
| 476 | case ADSP_IOCTL_ABORT_EVENT_READ: |
| 477 | adev->abort = 1; |
| 478 | wake_up(&adev->event_wait); |
| 479 | break; |
| 480 | |
| 481 | case ADSP_IOCTL_UNREGISTER_PMEM: |
| 482 | return adsp_pmem_del(adev->module); |
| 483 | |
| 484 | default: |
| 485 | break; |
| 486 | } |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | |
| 490 | static int adsp_release(struct inode *inode, struct file *filp) |
| 491 | { |
| 492 | struct adsp_device *adev = filp->private_data; |
| 493 | struct msm_adsp_module *module = adev->module; |
| 494 | int rc = 0; |
| 495 | |
| 496 | MM_INFO("release '%s'\n", adev->name); |
| 497 | |
| 498 | /* clear module before putting it to avoid race with open() */ |
| 499 | adev->module = NULL; |
| 500 | |
| 501 | rc = adsp_pmem_del(module); |
| 502 | |
| 503 | msm_adsp_put(module); |
| 504 | return rc; |
| 505 | } |
| 506 | |
| 507 | static void adsp_event(void *driver_data, unsigned id, size_t len, |
| 508 | void (*getevent)(void *ptr, size_t len)) |
| 509 | { |
| 510 | struct adsp_device *adev = driver_data; |
| 511 | struct adsp_event *event; |
| 512 | unsigned long flags; |
| 513 | |
| 514 | if (len > ADSP_EVENT_MAX_SIZE) { |
| 515 | MM_ERR("event too large (%d bytes)\n", len); |
| 516 | return; |
| 517 | } |
| 518 | |
| 519 | event = kmalloc(sizeof(*event), GFP_ATOMIC); |
| 520 | if (!event) { |
| 521 | MM_ERR("cannot allocate buffer\n"); |
| 522 | return; |
| 523 | } |
| 524 | |
| 525 | if (id != EVENT_MSG_ID) { |
| 526 | event->type = 0; |
| 527 | event->is16 = 0; |
| 528 | event->msg_id = id; |
| 529 | event->size = len; |
| 530 | |
| 531 | getevent(event->data.msg16, len); |
| 532 | } else { |
| 533 | event->type = 1; |
| 534 | event->is16 = 1; |
| 535 | event->msg_id = id; |
| 536 | event->size = len; |
| 537 | getevent(event->data.msg32, len); |
| 538 | } |
| 539 | |
| 540 | spin_lock_irqsave(&adev->event_queue_lock, flags); |
| 541 | list_add_tail(&event->list, &adev->event_queue); |
| 542 | spin_unlock_irqrestore(&adev->event_queue_lock, flags); |
| 543 | wake_up(&adev->event_wait); |
| 544 | } |
| 545 | |
| 546 | static struct msm_adsp_ops adsp_ops = { |
| 547 | .event = adsp_event, |
| 548 | }; |
| 549 | |
| 550 | static int adsp_open(struct inode *inode, struct file *filp) |
| 551 | { |
| 552 | struct adsp_device *adev; |
| 553 | int rc; |
| 554 | |
| 555 | rc = nonseekable_open(inode, filp); |
| 556 | if (rc < 0) |
| 557 | return rc; |
| 558 | |
| 559 | adev = inode_to_device(inode); |
| 560 | if (!adev) |
| 561 | return -ENODEV; |
| 562 | |
| 563 | MM_INFO("open '%s'\n", adev->name); |
| 564 | |
| 565 | rc = msm_adsp_get(adev->name, &adev->module, &adsp_ops, adev); |
| 566 | if (rc) |
| 567 | return rc; |
| 568 | |
| 569 | MM_INFO("opened module '%s' adev %p\n", adev->name, adev); |
| 570 | filp->private_data = adev; |
| 571 | adev->abort = 0; |
| 572 | INIT_HLIST_HEAD(&adev->module->pmem_regions); |
| 573 | mutex_init(&adev->module->pmem_regions_lock); |
| 574 | |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | static unsigned adsp_device_count; |
| 579 | static struct adsp_device *adsp_devices; |
| 580 | |
| 581 | static struct adsp_device *inode_to_device(struct inode *inode) |
| 582 | { |
| 583 | unsigned n = MINOR(inode->i_rdev); |
| 584 | if (n < adsp_device_count) { |
| 585 | if (adsp_devices[n].device) |
| 586 | return adsp_devices + n; |
| 587 | } |
| 588 | return NULL; |
| 589 | } |
| 590 | |
| 591 | static dev_t adsp_devno; |
| 592 | static struct class *adsp_class; |
| 593 | |
| 594 | static const struct file_operations adsp_fops = { |
| 595 | .owner = THIS_MODULE, |
| 596 | .open = adsp_open, |
| 597 | .unlocked_ioctl = adsp_ioctl, |
| 598 | .release = adsp_release, |
| 599 | }; |
| 600 | |
| 601 | static void adsp_create(struct adsp_device *adev, const char *name, |
| 602 | struct device *parent, dev_t devt) |
| 603 | { |
| 604 | struct device *dev; |
| 605 | int rc; |
| 606 | |
| 607 | dev = device_create(adsp_class, parent, devt, "%s", name); |
| 608 | if (IS_ERR(dev)) |
| 609 | return; |
| 610 | |
| 611 | init_waitqueue_head(&adev->event_wait); |
| 612 | INIT_LIST_HEAD(&adev->event_queue); |
| 613 | spin_lock_init(&adev->event_queue_lock); |
| 614 | |
| 615 | cdev_init(&adev->cdev, &adsp_fops); |
| 616 | adev->cdev.owner = THIS_MODULE; |
| 617 | |
| 618 | rc = cdev_add(&adev->cdev, devt, 1); |
| 619 | if (rc < 0) { |
| 620 | device_destroy(adsp_class, devt); |
| 621 | } else { |
| 622 | adev->device = dev; |
| 623 | adev->name = name; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | void msm_adsp_publish_cdevs(struct msm_adsp_module *modules, unsigned n) |
| 628 | { |
| 629 | int rc; |
| 630 | |
| 631 | adsp_devices = kzalloc(sizeof(struct adsp_device) * n, GFP_KERNEL); |
| 632 | if (!adsp_devices) |
| 633 | return; |
| 634 | |
| 635 | adsp_class = class_create(THIS_MODULE, "adsp"); |
| 636 | if (IS_ERR(adsp_class)) |
| 637 | goto fail_create_class; |
| 638 | |
| 639 | rc = alloc_chrdev_region(&adsp_devno, 0, n, "adsp"); |
| 640 | if (rc < 0) |
| 641 | goto fail_alloc_region; |
| 642 | |
| 643 | adsp_device_count = n; |
| 644 | for (n = 0; n < adsp_device_count; n++) { |
| 645 | adsp_create(adsp_devices + n, |
| 646 | modules[n].name, &modules[n].pdev.dev, |
| 647 | MKDEV(MAJOR(adsp_devno), n)); |
| 648 | } |
| 649 | |
| 650 | return; |
| 651 | |
| 652 | fail_alloc_region: |
| 653 | class_unregister(adsp_class); |
| 654 | fail_create_class: |
| 655 | kfree(adsp_devices); |
| 656 | } |