| 1 | /* $FreeBSD$ */ |
| 2 | /*- |
| 3 | * Copyright (c) 2006-2008 Hans Petter Selasky. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | * |
| 26 | * |
| 27 | * usb_dev.c - An abstraction layer for creating devices under /dev/... |
| 28 | */ |
| 29 | |
| 30 | #include <sys/stdint.h> |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/queue.h> |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/systm.h> |
| 35 | #include <sys/kernel.h> |
| 36 | #include <sys/thread2.h> |
| 37 | #include <sys/bus.h> |
| 38 | #include <sys/module.h> |
| 39 | #include <sys/lock.h> |
| 40 | #include <sys/mutex.h> |
| 41 | #include <sys/condvar.h> |
| 42 | #include <sys/sysctl.h> |
| 43 | #include <sys/unistd.h> |
| 44 | #include <sys/callout.h> |
| 45 | #include <sys/malloc.h> |
| 46 | #include <sys/priv.h> |
| 47 | #include <sys/vnode.h> |
| 48 | #include <sys/conf.h> |
| 49 | #include <sys/fcntl.h> |
| 50 | |
| 51 | #include <bus/u4b/usb.h> |
| 52 | #include <bus/u4b/usb_ioctl.h> |
| 53 | #include <bus/u4b/usbdi.h> |
| 54 | #include <bus/u4b/usbdi_util.h> |
| 55 | |
| 56 | #define USB_DEBUG_VAR usb_fifo_debug |
| 57 | |
| 58 | #include <bus/u4b/usb_core.h> |
| 59 | #include <bus/u4b/usb_dev.h> |
| 60 | #include <bus/u4b/usb_mbuf.h> |
| 61 | #include <bus/u4b/usb_process.h> |
| 62 | #include <bus/u4b/usb_device.h> |
| 63 | #include <bus/u4b/usb_debug.h> |
| 64 | #include <bus/u4b/usb_busdma.h> |
| 65 | #include <bus/u4b/usb_generic.h> |
| 66 | #include <bus/u4b/usb_dynamic.h> |
| 67 | #include <bus/u4b/usb_util.h> |
| 68 | |
| 69 | #include <bus/u4b/usb_controller.h> |
| 70 | #include <bus/u4b/usb_bus.h> |
| 71 | |
| 72 | #include <sys/filio.h> |
| 73 | #include <sys/ttycom.h> |
| 74 | #include <sys/kern_syscall.h> |
| 75 | |
| 76 | #include <machine/stdarg.h> |
| 77 | |
| 78 | #if USB_HAVE_UGEN |
| 79 | |
| 80 | #ifdef USB_DEBUG |
| 81 | static int usb_fifo_debug = 0; |
| 82 | |
| 83 | static SYSCTL_NODE(_hw_usb, OID_AUTO, dev, CTLFLAG_RW, 0, "USB device"); |
| 84 | SYSCTL_INT(_hw_usb_dev, OID_AUTO, debug, CTLFLAG_RW, |
| 85 | &usb_fifo_debug, 0, "Debug Level"); |
| 86 | |
| 87 | TUNABLE_INT("hw.usb.dev.debug", &usb_fifo_debug); |
| 88 | #endif |
| 89 | |
| 90 | #define USB_UCRED struct ucred *ucred, |
| 91 | |
| 92 | /* prototypes */ |
| 93 | |
| 94 | static int usb_fifo_open(struct usb_cdev_privdata *, |
| 95 | struct usb_fifo *, int); |
| 96 | static void usb_fifo_close(struct usb_fifo *, int); |
| 97 | static void usb_dev_init(void *); |
| 98 | static void usb_dev_init_post(void *); |
| 99 | static void usb_dev_uninit(void *); |
| 100 | static int usb_fifo_uiomove(struct usb_fifo *, void *, int, |
| 101 | struct uio *); |
| 102 | static void usb_fifo_check_methods(struct usb_fifo_methods *); |
| 103 | static struct usb_fifo *usb_fifo_alloc(void); |
| 104 | static struct usb_endpoint *usb_dev_get_ep(struct usb_device *, uint8_t, |
| 105 | uint8_t); |
| 106 | static void usb_loc_fill(struct usb_fs_privdata *, |
| 107 | struct usb_cdev_privdata *); |
| 108 | static usb_error_t usb_ref_device(struct usb_cdev_privdata *, struct usb_cdev_refdata *, int); |
| 109 | static usb_error_t usb_usb_ref_device(struct usb_cdev_privdata *, struct usb_cdev_refdata *); |
| 110 | static void usb_unref_device(struct usb_cdev_privdata *, struct usb_cdev_refdata *); |
| 111 | |
| 112 | static void usb_filter_detach(struct knote *kn); |
| 113 | static int usb_filter_read(struct knote *kn, long hint); |
| 114 | static int usb_filter_write(struct knote *kn, long hint); |
| 115 | |
| 116 | static d_open_t usb_open; |
| 117 | static d_close_t usb_close; |
| 118 | static d_ioctl_t usb_ioctl; |
| 119 | static d_read_t usb_read; |
| 120 | static d_write_t usb_write; |
| 121 | static d_kqfilter_t usb_kqfilter; |
| 122 | static d_open_t usb_static_open; |
| 123 | static d_close_t usb_static_close; |
| 124 | static d_ioctl_t usb_static_ioctl; |
| 125 | |
| 126 | static usb_fifo_open_t usb_fifo_dummy_open; |
| 127 | static usb_fifo_close_t usb_fifo_dummy_close; |
| 128 | static usb_fifo_ioctl_t usb_fifo_dummy_ioctl; |
| 129 | static usb_fifo_cmd_t usb_fifo_dummy_cmd; |
| 130 | |
| 131 | /* character device structure used for devices (/dev/ugenX.Y and /dev/uXXX) */ |
| 132 | struct dev_ops usb_ops = { |
| 133 | { "usbdev", 0, D_MEM }, |
| 134 | .d_open = usb_open, |
| 135 | .d_close = usb_close, |
| 136 | .d_ioctl = usb_ioctl, |
| 137 | .d_read = usb_read, |
| 138 | .d_write = usb_write, |
| 139 | .d_kqfilter = usb_kqfilter |
| 140 | }; |
| 141 | |
| 142 | static struct cdev* usb_dev = NULL; |
| 143 | |
| 144 | /* character device structure used for /bus/u4b */ |
| 145 | static struct dev_ops usb_static_ops = { |
| 146 | { "usb", 0, D_MEM }, |
| 147 | .d_open = usb_static_open, |
| 148 | .d_close = usb_static_close, |
| 149 | .d_ioctl = usb_static_ioctl, |
| 150 | }; |
| 151 | |
| 152 | static TAILQ_HEAD(, usb_symlink) usb_sym_head; |
| 153 | static struct lock usb_sym_lock; |
| 154 | |
| 155 | struct lock usb_ref_lock; |
| 156 | |
| 157 | #if 0 |
| 158 | static int usb_nevents = 0; |
| 159 | static struct kqinfo usb_kqevent; |
| 160 | #endif |
| 161 | |
| 162 | /*------------------------------------------------------------------------* |
| 163 | * usb_loc_fill |
| 164 | * |
| 165 | * This is used to fill out a usb_cdev_privdata structure based on the |
| 166 | * device's address as contained in usb_fs_privdata. |
| 167 | *------------------------------------------------------------------------*/ |
| 168 | static void |
| 169 | usb_loc_fill(struct usb_fs_privdata* pd, struct usb_cdev_privdata *cpd) |
| 170 | { |
| 171 | cpd->bus_index = pd->bus_index; |
| 172 | cpd->dev_index = pd->dev_index; |
| 173 | cpd->ep_addr = pd->ep_addr; |
| 174 | cpd->fifo_index = pd->fifo_index; |
| 175 | } |
| 176 | |
| 177 | /*------------------------------------------------------------------------* |
| 178 | * usb_ref_device |
| 179 | * |
| 180 | * This function is used to atomically refer an USB device by its |
| 181 | * device location. If this function returns success the USB device |
| 182 | * will not dissappear until the USB device is unreferenced. |
| 183 | * |
| 184 | * Return values: |
| 185 | * 0: Success, refcount incremented on the given USB device. |
| 186 | * Else: Failure. |
| 187 | *------------------------------------------------------------------------*/ |
| 188 | static usb_error_t |
| 189 | usb_ref_device(struct usb_cdev_privdata *cpd, |
| 190 | struct usb_cdev_refdata *crd, int need_uref) |
| 191 | { |
| 192 | struct usb_fifo **ppf; |
| 193 | struct usb_fifo *f; |
| 194 | |
| 195 | DPRINTFN(2, "cpd=%p need uref=%d\n", cpd, need_uref); |
| 196 | |
| 197 | /* clear all refs */ |
| 198 | memset(crd, 0, sizeof(*crd)); |
| 199 | |
| 200 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 201 | cpd->bus = devclass_get_softc(usb_devclass_ptr, cpd->bus_index); |
| 202 | if (cpd->bus == NULL) { |
| 203 | DPRINTFN(2, "no bus at %u\n", cpd->bus_index); |
| 204 | goto error; |
| 205 | } |
| 206 | cpd->udev = cpd->bus->devices[cpd->dev_index]; |
| 207 | if (cpd->udev == NULL) { |
| 208 | DPRINTFN(2, "no device at %u\n", cpd->dev_index); |
| 209 | goto error; |
| 210 | } |
| 211 | if (cpd->udev->refcount == USB_DEV_REF_MAX) { |
| 212 | DPRINTFN(2, "no dev ref\n"); |
| 213 | goto error; |
| 214 | } |
| 215 | if (need_uref) { |
| 216 | DPRINTFN(2, "ref udev - needed\n"); |
| 217 | cpd->udev->refcount++; |
| 218 | |
| 219 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 220 | |
| 221 | /* |
| 222 | * We need to grab the sx-lock before grabbing the |
| 223 | * FIFO refs to avoid deadlock at detach! |
| 224 | */ |
| 225 | usbd_enum_lock(cpd->udev); |
| 226 | |
| 227 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 228 | |
| 229 | /* |
| 230 | * Set "is_uref" after grabbing the default SX lock |
| 231 | */ |
| 232 | crd->is_uref = 1; |
| 233 | } |
| 234 | |
| 235 | /* check if we are doing an open */ |
| 236 | if (cpd->fflags == 0) { |
| 237 | /* use zero defaults */ |
| 238 | } else { |
| 239 | /* check for write */ |
| 240 | if (cpd->fflags & FWRITE) { |
| 241 | ppf = cpd->udev->fifo; |
| 242 | f = ppf[cpd->fifo_index + USB_FIFO_TX]; |
| 243 | crd->txfifo = f; |
| 244 | crd->is_write = 1; /* ref */ |
| 245 | if (f == NULL || f->refcount == USB_FIFO_REF_MAX) |
| 246 | goto error; |
| 247 | if (f->curr_cpd != cpd) |
| 248 | goto error; |
| 249 | /* check if USB-FS is active */ |
| 250 | if (f->fs_ep_max != 0) { |
| 251 | crd->is_usbfs = 1; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /* check for read */ |
| 256 | if (cpd->fflags & FREAD) { |
| 257 | ppf = cpd->udev->fifo; |
| 258 | f = ppf[cpd->fifo_index + USB_FIFO_RX]; |
| 259 | crd->rxfifo = f; |
| 260 | crd->is_read = 1; /* ref */ |
| 261 | if (f == NULL || f->refcount == USB_FIFO_REF_MAX) |
| 262 | goto error; |
| 263 | if (f->curr_cpd != cpd) |
| 264 | goto error; |
| 265 | /* check if USB-FS is active */ |
| 266 | if (f->fs_ep_max != 0) { |
| 267 | crd->is_usbfs = 1; |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | /* when everything is OK we increment the refcounts */ |
| 273 | if (crd->is_write) { |
| 274 | DPRINTFN(2, "ref write\n"); |
| 275 | crd->txfifo->refcount++; |
| 276 | } |
| 277 | if (crd->is_read) { |
| 278 | DPRINTFN(2, "ref read\n"); |
| 279 | crd->rxfifo->refcount++; |
| 280 | } |
| 281 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 282 | |
| 283 | return (0); |
| 284 | |
| 285 | error: |
| 286 | if (crd->is_uref) { |
| 287 | usbd_enum_unlock(cpd->udev); |
| 288 | |
| 289 | if (--(cpd->udev->refcount) == 0) { |
| 290 | cv_signal(&cpd->udev->ref_cv); |
| 291 | } |
| 292 | } |
| 293 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 294 | DPRINTFN(2, "fail\n"); |
| 295 | return (USB_ERR_INVAL); |
| 296 | } |
| 297 | |
| 298 | /*------------------------------------------------------------------------* |
| 299 | * usb_usb_ref_device |
| 300 | * |
| 301 | * This function is used to upgrade an USB reference to include the |
| 302 | * USB device reference on a USB location. |
| 303 | * |
| 304 | * Return values: |
| 305 | * 0: Success, refcount incremented on the given USB device. |
| 306 | * Else: Failure. |
| 307 | *------------------------------------------------------------------------*/ |
| 308 | static usb_error_t |
| 309 | usb_usb_ref_device(struct usb_cdev_privdata *cpd, |
| 310 | struct usb_cdev_refdata *crd) |
| 311 | { |
| 312 | /* |
| 313 | * Check if we already got an USB reference on this location: |
| 314 | */ |
| 315 | if (crd->is_uref) |
| 316 | return (0); /* success */ |
| 317 | |
| 318 | /* |
| 319 | * To avoid deadlock at detach we need to drop the FIFO ref |
| 320 | * and re-acquire a new ref! |
| 321 | */ |
| 322 | usb_unref_device(cpd, crd); |
| 323 | |
| 324 | return (usb_ref_device(cpd, crd, 1 /* need uref */)); |
| 325 | } |
| 326 | |
| 327 | /*------------------------------------------------------------------------* |
| 328 | * usb_unref_device |
| 329 | * |
| 330 | * This function will release the reference count by one unit for the |
| 331 | * given USB device. |
| 332 | *------------------------------------------------------------------------*/ |
| 333 | static void |
| 334 | usb_unref_device(struct usb_cdev_privdata *cpd, |
| 335 | struct usb_cdev_refdata *crd) |
| 336 | { |
| 337 | |
| 338 | DPRINTFN(2, "cpd=%p is_uref=%d\n", cpd, crd->is_uref); |
| 339 | |
| 340 | if (crd->is_uref) |
| 341 | usbd_enum_unlock(cpd->udev); |
| 342 | |
| 343 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 344 | if (crd->is_read) { |
| 345 | if (--(crd->rxfifo->refcount) == 0) { |
| 346 | cv_signal(&crd->rxfifo->cv_drain); |
| 347 | } |
| 348 | crd->is_read = 0; |
| 349 | } |
| 350 | if (crd->is_write) { |
| 351 | if (--(crd->txfifo->refcount) == 0) { |
| 352 | cv_signal(&crd->txfifo->cv_drain); |
| 353 | } |
| 354 | crd->is_write = 0; |
| 355 | } |
| 356 | if (crd->is_uref) { |
| 357 | if (--(cpd->udev->refcount) == 0) { |
| 358 | cv_signal(&cpd->udev->ref_cv); |
| 359 | } |
| 360 | crd->is_uref = 0; |
| 361 | } |
| 362 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 363 | } |
| 364 | |
| 365 | static struct usb_fifo * |
| 366 | usb_fifo_alloc(void) |
| 367 | { |
| 368 | struct usb_fifo *f; |
| 369 | |
| 370 | f = kmalloc(sizeof(*f), M_USBDEV, M_WAITOK | M_ZERO); |
| 371 | if (f) { |
| 372 | cv_init(&f->cv_io, "FIFO-IO"); |
| 373 | cv_init(&f->cv_drain, "FIFO-DRAIN"); |
| 374 | f->refcount = 1; |
| 375 | } |
| 376 | return (f); |
| 377 | } |
| 378 | |
| 379 | /*------------------------------------------------------------------------* |
| 380 | * usb_fifo_create |
| 381 | *------------------------------------------------------------------------*/ |
| 382 | static int |
| 383 | usb_fifo_create(struct usb_cdev_privdata *cpd, |
| 384 | struct usb_cdev_refdata *crd) |
| 385 | { |
| 386 | struct usb_device *udev = cpd->udev; |
| 387 | struct usb_fifo *f; |
| 388 | struct usb_endpoint *ep; |
| 389 | uint8_t n; |
| 390 | uint8_t is_tx; |
| 391 | uint8_t is_rx; |
| 392 | uint8_t no_null; |
| 393 | uint8_t is_busy; |
| 394 | int e = cpd->ep_addr; |
| 395 | |
| 396 | is_tx = (cpd->fflags & FWRITE) ? 1 : 0; |
| 397 | is_rx = (cpd->fflags & FREAD) ? 1 : 0; |
| 398 | no_null = 1; |
| 399 | is_busy = 0; |
| 400 | |
| 401 | /* Preallocated FIFO */ |
| 402 | if (e < 0) { |
| 403 | DPRINTFN(5, "Preallocated FIFO\n"); |
| 404 | if (is_tx) { |
| 405 | f = udev->fifo[cpd->fifo_index + USB_FIFO_TX]; |
| 406 | if (f == NULL) |
| 407 | return (EINVAL); |
| 408 | crd->txfifo = f; |
| 409 | } |
| 410 | if (is_rx) { |
| 411 | f = udev->fifo[cpd->fifo_index + USB_FIFO_RX]; |
| 412 | if (f == NULL) |
| 413 | return (EINVAL); |
| 414 | crd->rxfifo = f; |
| 415 | } |
| 416 | return (0); |
| 417 | } |
| 418 | |
| 419 | KASSERT(e >= 0 && e <= 15, ("endpoint %d out of range", e)); |
| 420 | |
| 421 | /* search for a free FIFO slot */ |
| 422 | DPRINTFN(5, "Endpoint device, searching for 0x%02x\n", e); |
| 423 | for (n = 0;; n += 2) { |
| 424 | |
| 425 | if (n == USB_FIFO_MAX) { |
| 426 | if (no_null) { |
| 427 | no_null = 0; |
| 428 | n = 0; |
| 429 | } else { |
| 430 | /* end of FIFOs reached */ |
| 431 | DPRINTFN(5, "out of FIFOs\n"); |
| 432 | return (ENOMEM); |
| 433 | } |
| 434 | } |
| 435 | /* Check for TX FIFO */ |
| 436 | if (is_tx) { |
| 437 | f = udev->fifo[n + USB_FIFO_TX]; |
| 438 | if (f != NULL) { |
| 439 | if (f->dev_ep_index != e) { |
| 440 | /* wrong endpoint index */ |
| 441 | continue; |
| 442 | } |
| 443 | if (f->curr_cpd != NULL) { |
| 444 | /* FIFO is opened */ |
| 445 | is_busy = 1; |
| 446 | continue; |
| 447 | } |
| 448 | } else if (no_null) { |
| 449 | continue; |
| 450 | } |
| 451 | } |
| 452 | /* Check for RX FIFO */ |
| 453 | if (is_rx) { |
| 454 | f = udev->fifo[n + USB_FIFO_RX]; |
| 455 | if (f != NULL) { |
| 456 | if (f->dev_ep_index != e) { |
| 457 | /* wrong endpoint index */ |
| 458 | continue; |
| 459 | } |
| 460 | if (f->curr_cpd != NULL) { |
| 461 | /* FIFO is opened */ |
| 462 | is_busy = 1; |
| 463 | continue; |
| 464 | } |
| 465 | } else if (no_null) { |
| 466 | continue; |
| 467 | } |
| 468 | } |
| 469 | break; |
| 470 | } |
| 471 | |
| 472 | if (no_null == 0) { |
| 473 | if (e >= (USB_EP_MAX / 2)) { |
| 474 | /* we don't create any endpoints in this range */ |
| 475 | DPRINTFN(5, "ep out of range\n"); |
| 476 | return (is_busy ? EBUSY : EINVAL); |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | if ((e != 0) && is_busy) { |
| 481 | /* |
| 482 | * Only the default control endpoint is allowed to be |
| 483 | * opened multiple times! |
| 484 | */ |
| 485 | DPRINTFN(5, "busy\n"); |
| 486 | return (EBUSY); |
| 487 | } |
| 488 | |
| 489 | /* Check TX FIFO */ |
| 490 | if (is_tx && |
| 491 | (udev->fifo[n + USB_FIFO_TX] == NULL)) { |
| 492 | ep = usb_dev_get_ep(udev, e, USB_FIFO_TX); |
| 493 | DPRINTFN(5, "dev_get_endpoint(%d, 0x%x)\n", e, USB_FIFO_TX); |
| 494 | if (ep == NULL) { |
| 495 | DPRINTFN(5, "dev_get_endpoint returned NULL\n"); |
| 496 | return (EINVAL); |
| 497 | } |
| 498 | f = usb_fifo_alloc(); |
| 499 | if (f == NULL) { |
| 500 | DPRINTFN(5, "could not alloc tx fifo\n"); |
| 501 | return (ENOMEM); |
| 502 | } |
| 503 | /* update some fields */ |
| 504 | f->fifo_index = n + USB_FIFO_TX; |
| 505 | f->dev_ep_index = e; |
| 506 | f->priv_lock = &udev->device_lock; |
| 507 | f->priv_sc0 = ep; |
| 508 | f->methods = &usb_ugen_methods; |
| 509 | f->iface_index = ep->iface_index; |
| 510 | f->udev = udev; |
| 511 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 512 | udev->fifo[n + USB_FIFO_TX] = f; |
| 513 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 514 | } |
| 515 | /* Check RX FIFO */ |
| 516 | if (is_rx && |
| 517 | (udev->fifo[n + USB_FIFO_RX] == NULL)) { |
| 518 | |
| 519 | ep = usb_dev_get_ep(udev, e, USB_FIFO_RX); |
| 520 | DPRINTFN(5, "dev_get_endpoint(%d, 0x%x)\n", e, USB_FIFO_RX); |
| 521 | if (ep == NULL) { |
| 522 | DPRINTFN(5, "dev_get_endpoint returned NULL\n"); |
| 523 | return (EINVAL); |
| 524 | } |
| 525 | f = usb_fifo_alloc(); |
| 526 | if (f == NULL) { |
| 527 | DPRINTFN(5, "could not alloc rx fifo\n"); |
| 528 | return (ENOMEM); |
| 529 | } |
| 530 | /* update some fields */ |
| 531 | f->fifo_index = n + USB_FIFO_RX; |
| 532 | f->dev_ep_index = e; |
| 533 | f->priv_lock = &udev->device_lock; |
| 534 | f->priv_sc0 = ep; |
| 535 | f->methods = &usb_ugen_methods; |
| 536 | f->iface_index = ep->iface_index; |
| 537 | f->udev = udev; |
| 538 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 539 | udev->fifo[n + USB_FIFO_RX] = f; |
| 540 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 541 | } |
| 542 | if (is_tx) { |
| 543 | crd->txfifo = udev->fifo[n + USB_FIFO_TX]; |
| 544 | } |
| 545 | if (is_rx) { |
| 546 | crd->rxfifo = udev->fifo[n + USB_FIFO_RX]; |
| 547 | } |
| 548 | /* fill out fifo index */ |
| 549 | DPRINTFN(5, "fifo index = %d\n", n); |
| 550 | cpd->fifo_index = n; |
| 551 | |
| 552 | /* complete */ |
| 553 | |
| 554 | return (0); |
| 555 | } |
| 556 | |
| 557 | void |
| 558 | usb_fifo_free(struct usb_fifo *f) |
| 559 | { |
| 560 | uint8_t n; |
| 561 | |
| 562 | if (f == NULL) { |
| 563 | /* be NULL safe */ |
| 564 | return; |
| 565 | } |
| 566 | /* destroy symlink devices, if any */ |
| 567 | for (n = 0; n != 2; n++) { |
| 568 | if (f->symlink[n]) { |
| 569 | usb_free_symlink(f->symlink[n]); |
| 570 | f->symlink[n] = NULL; |
| 571 | } |
| 572 | } |
| 573 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 574 | |
| 575 | /* delink ourselves to stop calls from userland */ |
| 576 | if ((f->fifo_index < USB_FIFO_MAX) && |
| 577 | (f->udev != NULL) && |
| 578 | (f->udev->fifo[f->fifo_index] == f)) { |
| 579 | f->udev->fifo[f->fifo_index] = NULL; |
| 580 | } else { |
| 581 | DPRINTFN(0, "USB FIFO %p has not been linked\n", f); |
| 582 | } |
| 583 | |
| 584 | /* decrease refcount */ |
| 585 | f->refcount--; |
| 586 | /* prevent any write flush */ |
| 587 | f->flag_iserror = 1; |
| 588 | /* need to wait until all callers have exited */ |
| 589 | while (f->refcount != 0) { |
| 590 | lockmgr(&usb_ref_lock, LK_RELEASE); /* avoid LOR */ |
| 591 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 592 | /* get I/O thread out of any sleep state */ |
| 593 | if (f->flag_sleeping) { |
| 594 | f->flag_sleeping = 0; |
| 595 | cv_broadcast(&f->cv_io); |
| 596 | } |
| 597 | lockmgr(f->priv_lock, LK_RELEASE); |
| 598 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 599 | |
| 600 | /* wait for sync */ |
| 601 | cv_wait(&f->cv_drain, &usb_ref_lock); |
| 602 | } |
| 603 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 604 | |
| 605 | /* take care of closing the device here, if any */ |
| 606 | usb_fifo_close(f, 0); |
| 607 | |
| 608 | cv_destroy(&f->cv_io); |
| 609 | cv_destroy(&f->cv_drain); |
| 610 | |
| 611 | kfree(f, M_USBDEV); |
| 612 | } |
| 613 | |
| 614 | static struct usb_endpoint * |
| 615 | usb_dev_get_ep(struct usb_device *udev, uint8_t ep_index, uint8_t dir) |
| 616 | { |
| 617 | struct usb_endpoint *ep; |
| 618 | uint8_t ep_dir; |
| 619 | |
| 620 | if (ep_index == 0) { |
| 621 | ep = &udev->ctrl_ep; |
| 622 | } else { |
| 623 | if (dir == USB_FIFO_RX) { |
| 624 | if (udev->flags.usb_mode == USB_MODE_HOST) { |
| 625 | ep_dir = UE_DIR_IN; |
| 626 | } else { |
| 627 | ep_dir = UE_DIR_OUT; |
| 628 | } |
| 629 | } else { |
| 630 | if (udev->flags.usb_mode == USB_MODE_HOST) { |
| 631 | ep_dir = UE_DIR_OUT; |
| 632 | } else { |
| 633 | ep_dir = UE_DIR_IN; |
| 634 | } |
| 635 | } |
| 636 | ep = usbd_get_ep_by_addr(udev, ep_index | ep_dir); |
| 637 | } |
| 638 | |
| 639 | if (ep == NULL) { |
| 640 | /* if the endpoint does not exist then return */ |
| 641 | return (NULL); |
| 642 | } |
| 643 | if (ep->edesc == NULL) { |
| 644 | /* invalid endpoint */ |
| 645 | return (NULL); |
| 646 | } |
| 647 | return (ep); /* success */ |
| 648 | } |
| 649 | |
| 650 | /*------------------------------------------------------------------------* |
| 651 | * usb_fifo_open |
| 652 | * |
| 653 | * Returns: |
| 654 | * 0: Success |
| 655 | * Else: Failure |
| 656 | *------------------------------------------------------------------------*/ |
| 657 | static int |
| 658 | usb_fifo_open(struct usb_cdev_privdata *cpd, |
| 659 | struct usb_fifo *f, int fflags) |
| 660 | { |
| 661 | int err; |
| 662 | |
| 663 | if (f == NULL) { |
| 664 | /* no FIFO there */ |
| 665 | DPRINTFN(2, "no FIFO\n"); |
| 666 | return (ENXIO); |
| 667 | } |
| 668 | /* remove FWRITE and FREAD flags */ |
| 669 | fflags &= ~(FWRITE | FREAD); |
| 670 | |
| 671 | /* set correct file flags */ |
| 672 | if ((f->fifo_index & 1) == USB_FIFO_TX) { |
| 673 | fflags |= FWRITE; |
| 674 | } else { |
| 675 | fflags |= FREAD; |
| 676 | } |
| 677 | |
| 678 | /* check if we are already opened */ |
| 679 | /* we don't need any locks when checking this variable */ |
| 680 | if (f->curr_cpd != NULL) { |
| 681 | err = EBUSY; |
| 682 | goto done; |
| 683 | } |
| 684 | |
| 685 | /* reset short flag before open */ |
| 686 | f->flag_short = 0; |
| 687 | |
| 688 | /* call open method */ |
| 689 | err = (f->methods->f_open) (f, fflags); |
| 690 | if (err) { |
| 691 | goto done; |
| 692 | } |
| 693 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 694 | |
| 695 | /* reset sleep flag */ |
| 696 | f->flag_sleeping = 0; |
| 697 | |
| 698 | /* reset error flag */ |
| 699 | f->flag_iserror = 0; |
| 700 | |
| 701 | /* reset complete flag */ |
| 702 | f->flag_iscomplete = 0; |
| 703 | |
| 704 | /* reset select flag */ |
| 705 | f->flag_isselect = 0; |
| 706 | |
| 707 | /* reset flushing flag */ |
| 708 | f->flag_flushing = 0; |
| 709 | |
| 710 | /* reset ASYNC proc flag */ |
| 711 | f->async_p = NULL; |
| 712 | |
| 713 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 714 | /* flag the fifo as opened to prevent others */ |
| 715 | f->curr_cpd = cpd; |
| 716 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 717 | |
| 718 | /* reset queue */ |
| 719 | usb_fifo_reset(f); |
| 720 | |
| 721 | lockmgr(f->priv_lock, LK_RELEASE); |
| 722 | done: |
| 723 | return (err); |
| 724 | } |
| 725 | |
| 726 | /*------------------------------------------------------------------------* |
| 727 | * usb_fifo_reset |
| 728 | *------------------------------------------------------------------------*/ |
| 729 | void |
| 730 | usb_fifo_reset(struct usb_fifo *f) |
| 731 | { |
| 732 | struct usb_mbuf *m; |
| 733 | |
| 734 | if (f == NULL) { |
| 735 | return; |
| 736 | } |
| 737 | while (1) { |
| 738 | USB_IF_DEQUEUE(&f->used_q, m); |
| 739 | if (m) { |
| 740 | USB_IF_ENQUEUE(&f->free_q, m); |
| 741 | } else { |
| 742 | break; |
| 743 | } |
| 744 | } |
| 745 | /* reset have fragment flag */ |
| 746 | f->flag_have_fragment = 0; |
| 747 | } |
| 748 | |
| 749 | /*------------------------------------------------------------------------* |
| 750 | * usb_fifo_close |
| 751 | *------------------------------------------------------------------------*/ |
| 752 | static void |
| 753 | usb_fifo_close(struct usb_fifo *f, int fflags) |
| 754 | { |
| 755 | int err; |
| 756 | |
| 757 | /* check if we are not opened */ |
| 758 | if (f->curr_cpd == NULL) { |
| 759 | /* nothing to do - already closed */ |
| 760 | return; |
| 761 | } |
| 762 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 763 | |
| 764 | /* clear current cdev private data pointer */ |
| 765 | f->curr_cpd = NULL; |
| 766 | |
| 767 | /* check if we are selected */ |
| 768 | if (f->flag_isselect) { |
| 769 | #if 0 /* XXXDF */ |
| 770 | selwakeup(&f->selinfo); |
| 771 | #endif |
| 772 | f->flag_isselect = 0; |
| 773 | } |
| 774 | /* check if a thread wants SIGIO */ |
| 775 | if (f->async_p != NULL && lwkt_trytoken(&f->async_p->p_token)) { |
| 776 | ksignal(f->async_p, SIGIO); |
| 777 | lwkt_reltoken(&f->async_p->p_token); |
| 778 | f->async_p = NULL; |
| 779 | } |
| 780 | /* remove FWRITE and FREAD flags */ |
| 781 | fflags &= ~(FWRITE | FREAD); |
| 782 | |
| 783 | /* flush written data, if any */ |
| 784 | if ((f->fifo_index & 1) == USB_FIFO_TX) { |
| 785 | |
| 786 | if (!f->flag_iserror) { |
| 787 | |
| 788 | /* set flushing flag */ |
| 789 | f->flag_flushing = 1; |
| 790 | |
| 791 | /* get the last packet in */ |
| 792 | if (f->flag_have_fragment) { |
| 793 | struct usb_mbuf *m; |
| 794 | f->flag_have_fragment = 0; |
| 795 | USB_IF_DEQUEUE(&f->free_q, m); |
| 796 | if (m) { |
| 797 | USB_IF_ENQUEUE(&f->used_q, m); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | /* start write transfer, if not already started */ |
| 802 | (f->methods->f_start_write) (f); |
| 803 | |
| 804 | /* check if flushed already */ |
| 805 | while (f->flag_flushing && |
| 806 | (!f->flag_iserror)) { |
| 807 | /* wait until all data has been written */ |
| 808 | f->flag_sleeping = 1; |
| 809 | err = cv_wait_sig(&f->cv_io, f->priv_lock); |
| 810 | if (err) { |
| 811 | DPRINTF("signal received\n"); |
| 812 | break; |
| 813 | } |
| 814 | } |
| 815 | } |
| 816 | fflags |= FWRITE; |
| 817 | |
| 818 | /* stop write transfer, if not already stopped */ |
| 819 | (f->methods->f_stop_write) (f); |
| 820 | } else { |
| 821 | fflags |= FREAD; |
| 822 | |
| 823 | /* stop write transfer, if not already stopped */ |
| 824 | (f->methods->f_stop_read) (f); |
| 825 | } |
| 826 | |
| 827 | /* check if we are sleeping */ |
| 828 | if (f->flag_sleeping) { |
| 829 | DPRINTFN(2, "Sleeping at close!\n"); |
| 830 | } |
| 831 | lockmgr(f->priv_lock, LK_RELEASE); |
| 832 | |
| 833 | /* call close method */ |
| 834 | (f->methods->f_close) (f, fflags); |
| 835 | |
| 836 | DPRINTF("closed\n"); |
| 837 | } |
| 838 | |
| 839 | /*------------------------------------------------------------------------* |
| 840 | * usb_open - cdev callback |
| 841 | *------------------------------------------------------------------------*/ |
| 842 | static int |
| 843 | usb_open(struct dev_open_args *ap) |
| 844 | { |
| 845 | struct cdev *dev = ap->a_head.a_dev; |
| 846 | int fflags = ap->a_oflags; |
| 847 | struct usb_fs_privdata* pd = (struct usb_fs_privdata*)dev->si_drv1; |
| 848 | struct usb_cdev_refdata refs; |
| 849 | struct usb_cdev_privdata *cpd; |
| 850 | int err, ep; |
| 851 | |
| 852 | DPRINTFN(2, "%s fflags=0x%08x\n", devtoname(dev), fflags); |
| 853 | |
| 854 | KASSERT(fflags & (FREAD|FWRITE), ("invalid open flags")); |
| 855 | if (((fflags & FREAD) && !(pd->mode & FREAD)) || |
| 856 | ((fflags & FWRITE) && !(pd->mode & FWRITE))) { |
| 857 | DPRINTFN(2, "access mode not supported\n"); |
| 858 | return (EPERM); |
| 859 | } |
| 860 | |
| 861 | cpd = kmalloc(sizeof(*cpd), M_USBDEV, M_WAITOK | M_ZERO); |
| 862 | ep = cpd->ep_addr = pd->ep_addr; |
| 863 | |
| 864 | usb_loc_fill(pd, cpd); |
| 865 | err = usb_ref_device(cpd, &refs, 1); |
| 866 | if (err) { |
| 867 | DPRINTFN(2, "cannot ref device\n"); |
| 868 | kfree(cpd, M_USBDEV); |
| 869 | return (ENXIO); |
| 870 | } |
| 871 | cpd->fflags = fflags; /* access mode for open lifetime */ |
| 872 | |
| 873 | /* create FIFOs, if any */ |
| 874 | err = usb_fifo_create(cpd, &refs); |
| 875 | /* check for error */ |
| 876 | if (err) { |
| 877 | DPRINTFN(2, "cannot create fifo\n"); |
| 878 | usb_unref_device(cpd, &refs); |
| 879 | kfree(cpd, M_USBDEV); |
| 880 | return (err); |
| 881 | } |
| 882 | if (fflags & FREAD) { |
| 883 | err = usb_fifo_open(cpd, refs.rxfifo, fflags); |
| 884 | if (err) { |
| 885 | DPRINTFN(2, "read open failed\n"); |
| 886 | usb_unref_device(cpd, &refs); |
| 887 | kfree(cpd, M_USBDEV); |
| 888 | return (err); |
| 889 | } |
| 890 | } |
| 891 | if (fflags & FWRITE) { |
| 892 | err = usb_fifo_open(cpd, refs.txfifo, fflags); |
| 893 | if (err) { |
| 894 | DPRINTFN(2, "write open failed\n"); |
| 895 | if (fflags & FREAD) { |
| 896 | usb_fifo_close(refs.rxfifo, fflags); |
| 897 | } |
| 898 | usb_unref_device(cpd, &refs); |
| 899 | kfree(cpd, M_USBDEV); |
| 900 | return (err); |
| 901 | } |
| 902 | } |
| 903 | usb_unref_device(cpd, &refs); |
| 904 | #if 0 /* XXX: markusp: which privs? */ |
| 905 | devfs_set_cdevpriv(cpd, usb_close); |
| 906 | #endif |
| 907 | /* XXX: This might not work as I expect! */ |
| 908 | dev->si_drv2 = (void *)cpd; |
| 909 | return (0); |
| 910 | } |
| 911 | |
| 912 | /*------------------------------------------------------------------------* |
| 913 | * usb_close - cdev callback |
| 914 | *------------------------------------------------------------------------*/ |
| 915 | static int |
| 916 | usb_close(struct dev_close_args *ap) |
| 917 | { |
| 918 | struct cdev *dev = ap->a_head.a_dev; |
| 919 | struct usb_cdev_refdata refs; |
| 920 | struct usb_cdev_privdata *cpd = (struct usb_cdev_privdata *)dev->si_drv2; |
| 921 | int err; |
| 922 | |
| 923 | DPRINTFN(2, "cpd=%p\n", cpd); |
| 924 | |
| 925 | err = usb_ref_device(cpd, &refs, 0); |
| 926 | if (err) |
| 927 | goto done; |
| 928 | |
| 929 | /* |
| 930 | * If this function is not called directly from the root HUB |
| 931 | * thread, there is usually a need to lock the enumeration |
| 932 | * lock. Check this. |
| 933 | */ |
| 934 | if (!usbd_enum_is_locked(cpd->udev)) { |
| 935 | |
| 936 | DPRINTFN(2, "Locking enumeration\n"); |
| 937 | |
| 938 | /* reference device */ |
| 939 | err = usb_usb_ref_device(cpd, &refs); |
| 940 | if (err) |
| 941 | goto done; |
| 942 | } |
| 943 | if (cpd->fflags & FREAD) { |
| 944 | usb_fifo_close(refs.rxfifo, cpd->fflags); |
| 945 | } |
| 946 | if (cpd->fflags & FWRITE) { |
| 947 | usb_fifo_close(refs.txfifo, cpd->fflags); |
| 948 | } |
| 949 | usb_unref_device(cpd, &refs); |
| 950 | done: |
| 951 | kfree(cpd, M_USBDEV); |
| 952 | return 0; |
| 953 | } |
| 954 | |
| 955 | static void |
| 956 | usb_dev_init(void *arg) |
| 957 | { |
| 958 | lockinit(&usb_ref_lock, "USB ref mutex", 0, 0); |
| 959 | lockinit(&usb_sym_lock, "USB sym mutex", 0, 0); |
| 960 | TAILQ_INIT(&usb_sym_head); |
| 961 | |
| 962 | /* check the UGEN methods */ |
| 963 | usb_fifo_check_methods(&usb_ugen_methods); |
| 964 | } |
| 965 | |
| 966 | /* XXX SI_SUB_KLD? */ |
| 967 | SYSINIT(usb_dev_init, SI_SUB_PRE_DRIVERS, SI_ORDER_FIRST, usb_dev_init, NULL); |
| 968 | |
| 969 | static void |
| 970 | usb_dev_init_post(void *arg) |
| 971 | { |
| 972 | /* |
| 973 | * Create /dev/usb - this is needed for usbconfig(8), which |
| 974 | * needs a well-known device name to access. |
| 975 | */ |
| 976 | usb_dev = make_dev(&usb_static_ops, 0, UID_ROOT, GID_OPERATOR, |
| 977 | 0644, USB_DEVICE_NAME); |
| 978 | if (usb_dev == NULL) { |
| 979 | DPRINTFN(0, "Could not create usb bus device\n"); |
| 980 | } |
| 981 | } |
| 982 | |
| 983 | SYSINIT(usb_dev_init_post, SI_SUB_DRIVERS, SI_ORDER_FIRST, usb_dev_init_post, |
| 984 | NULL); |
| 985 | |
| 986 | static void |
| 987 | usb_dev_uninit(void *arg) |
| 988 | { |
| 989 | if (usb_dev != NULL) { |
| 990 | destroy_dev(usb_dev); |
| 991 | usb_dev = NULL; |
| 992 | } |
| 993 | lockuninit(&usb_ref_lock); |
| 994 | lockuninit(&usb_sym_lock); |
| 995 | } |
| 996 | |
| 997 | SYSUNINIT(usb_dev_uninit, SI_SUB_KICK_SCHEDULER, SI_ORDER_ANY, usb_dev_uninit, NULL); |
| 998 | |
| 999 | static int |
| 1000 | usb_ioctl_f_sub(struct usb_fifo *f, u_long cmd, void *addr, |
| 1001 | struct thread *td) |
| 1002 | { |
| 1003 | int error = 0; |
| 1004 | |
| 1005 | switch (cmd) { |
| 1006 | case FIODTYPE: |
| 1007 | *(int *)addr = 0; /* character device */ |
| 1008 | break; |
| 1009 | |
| 1010 | case FIONBIO: |
| 1011 | /* handled by upper FS layer */ |
| 1012 | break; |
| 1013 | |
| 1014 | case FIOASYNC: |
| 1015 | if (*(int *)addr) { |
| 1016 | if (f->async_p != NULL) { |
| 1017 | error = EBUSY; |
| 1018 | break; |
| 1019 | } |
| 1020 | f->async_p = USB_TD_GET_PROC(td); |
| 1021 | } else { |
| 1022 | f->async_p = NULL; |
| 1023 | } |
| 1024 | break; |
| 1025 | |
| 1026 | /* XXX this is not the most general solution */ |
| 1027 | case TIOCSPGRP: |
| 1028 | if (f->async_p == NULL) { |
| 1029 | error = EINVAL; |
| 1030 | break; |
| 1031 | } |
| 1032 | if (*(int *)addr != USB_PROC_GET_GID(f->async_p)) { |
| 1033 | error = EPERM; |
| 1034 | break; |
| 1035 | } |
| 1036 | break; |
| 1037 | default: |
| 1038 | return (ENOIOCTL); |
| 1039 | } |
| 1040 | DPRINTFN(3, "cmd 0x%lx = %d\n", cmd, error); |
| 1041 | return (error); |
| 1042 | } |
| 1043 | |
| 1044 | /*------------------------------------------------------------------------* |
| 1045 | * usb_ioctl - cdev callback |
| 1046 | *------------------------------------------------------------------------*/ |
| 1047 | static int |
| 1048 | usb_ioctl(struct dev_ioctl_args *ap) |
| 1049 | { |
| 1050 | struct cdev *dev = ap->a_head.a_dev; |
| 1051 | u_long cmd = ap->a_cmd; |
| 1052 | caddr_t addr = ap->a_data; |
| 1053 | /* XXX: What is this thread and where is it supposed to come from */ |
| 1054 | struct thread *td = curthread; |
| 1055 | struct usb_cdev_refdata refs; |
| 1056 | struct usb_cdev_privdata* cpd; |
| 1057 | struct usb_fifo *f; |
| 1058 | int fflags; |
| 1059 | int err; |
| 1060 | |
| 1061 | DPRINTFN(2, "cmd=0x%lx\n", cmd); |
| 1062 | |
| 1063 | #if 0 /* XXX: cdev? */ |
| 1064 | err = devfs_get_cdevpriv((void **)&cpd); |
| 1065 | if (err != 0) |
| 1066 | return (err); |
| 1067 | #endif |
| 1068 | |
| 1069 | /* |
| 1070 | * XXX: This might not work as I would like it to |
| 1071 | * also I need a proper return value if it does |
| 1072 | */ |
| 1073 | if(dev->si_drv2 == NULL) |
| 1074 | return(-1); |
| 1075 | |
| 1076 | cpd = (struct usb_cdev_privdata *)dev->si_drv2; |
| 1077 | |
| 1078 | /* |
| 1079 | * Performance optimisation: We try to check for IOCTL's that |
| 1080 | * don't need the USB reference first. Then we grab the USB |
| 1081 | * reference if we need it! |
| 1082 | */ |
| 1083 | err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); |
| 1084 | if (err) |
| 1085 | return (ENXIO); |
| 1086 | |
| 1087 | fflags = cpd->fflags; |
| 1088 | |
| 1089 | f = NULL; /* set default value */ |
| 1090 | err = ENOIOCTL; /* set default value */ |
| 1091 | |
| 1092 | if (fflags & FWRITE) { |
| 1093 | f = refs.txfifo; |
| 1094 | err = usb_ioctl_f_sub(f, cmd, addr, td); |
| 1095 | } |
| 1096 | if (fflags & FREAD) { |
| 1097 | f = refs.rxfifo; |
| 1098 | err = usb_ioctl_f_sub(f, cmd, addr, td); |
| 1099 | } |
| 1100 | KASSERT(f != NULL, ("fifo not found")); |
| 1101 | if (err != ENOIOCTL) |
| 1102 | goto done; |
| 1103 | |
| 1104 | err = (f->methods->f_ioctl) (f, cmd, addr, fflags); |
| 1105 | |
| 1106 | DPRINTFN(2, "f_ioctl cmd 0x%lx = %d\n", cmd, err); |
| 1107 | |
| 1108 | if (err != ENOIOCTL) |
| 1109 | goto done; |
| 1110 | |
| 1111 | if (usb_usb_ref_device(cpd, &refs)) { |
| 1112 | err = ENXIO; |
| 1113 | goto done; |
| 1114 | } |
| 1115 | |
| 1116 | err = (f->methods->f_ioctl_post) (f, cmd, addr, fflags); |
| 1117 | |
| 1118 | DPRINTFN(2, "f_ioctl_post cmd 0x%lx = %d\n", cmd, err); |
| 1119 | |
| 1120 | if (err == ENOIOCTL) |
| 1121 | err = ENOTTY; |
| 1122 | |
| 1123 | if (err) |
| 1124 | goto done; |
| 1125 | |
| 1126 | /* Wait for re-enumeration, if any */ |
| 1127 | |
| 1128 | while (f->udev->re_enumerate_wait != 0) { |
| 1129 | |
| 1130 | usb_unref_device(cpd, &refs); |
| 1131 | |
| 1132 | usb_pause_mtx(NULL, hz / 128); |
| 1133 | |
| 1134 | if (usb_ref_device(cpd, &refs, 1 /* need uref */)) { |
| 1135 | err = ENXIO; |
| 1136 | goto done; |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | done: |
| 1141 | usb_unref_device(cpd, &refs); |
| 1142 | return (err); |
| 1143 | } |
| 1144 | |
| 1145 | static struct filterops usb_filtops_read = |
| 1146 | { FILTEROP_ISFD, NULL, usb_filter_detach, usb_filter_read }; |
| 1147 | |
| 1148 | static struct filterops usb_filtops_write = |
| 1149 | { FILTEROP_ISFD, NULL, usb_filter_detach, usb_filter_write }; |
| 1150 | |
| 1151 | static int |
| 1152 | usb_kqfilter(struct dev_kqfilter_args *ap) |
| 1153 | { |
| 1154 | cdev_t dev = ap->a_head.a_dev; |
| 1155 | struct knote *kn = ap->a_kn; |
| 1156 | |
| 1157 | ap->a_result = 0; |
| 1158 | |
| 1159 | switch(kn->kn_filter) { |
| 1160 | case EVFILT_READ: |
| 1161 | kn->kn_fop = &usb_filtops_read; |
| 1162 | kn->kn_hook = (caddr_t)dev; |
| 1163 | break; |
| 1164 | case EVFILT_WRITE: |
| 1165 | kn->kn_fop = &usb_filtops_write; |
| 1166 | kn->kn_hook = (caddr_t)dev; |
| 1167 | break; |
| 1168 | default: |
| 1169 | ap->a_result = EOPNOTSUPP; |
| 1170 | return(0); |
| 1171 | } |
| 1172 | |
| 1173 | return(0); |
| 1174 | } |
| 1175 | |
| 1176 | static void |
| 1177 | usb_filter_detach(struct knote *kn) |
| 1178 | { |
| 1179 | #if 0 |
| 1180 | struct klist *klist; |
| 1181 | |
| 1182 | klist = &usb_kqevent.ki_note; |
| 1183 | knote_remove(klist, kn); |
| 1184 | #endif |
| 1185 | } |
| 1186 | |
| 1187 | static int |
| 1188 | usb_filter_read(struct knote *kn, long hint) |
| 1189 | { |
| 1190 | return(0); |
| 1191 | } |
| 1192 | |
| 1193 | static int |
| 1194 | usb_filter_write(struct knote *kn, long hint) |
| 1195 | { |
| 1196 | return(0); |
| 1197 | } |
| 1198 | |
| 1199 | #if 0 /* XXX implement using kqfilter */ |
| 1200 | /* ARGSUSED */ |
| 1201 | static int |
| 1202 | usb_poll(struct cdev* dev, int events, struct thread* td) |
| 1203 | { |
| 1204 | struct usb_cdev_refdata refs; |
| 1205 | struct usb_cdev_privdata* cpd; |
| 1206 | struct usb_fifo *f; |
| 1207 | struct usb_mbuf *m; |
| 1208 | int fflags, revents; |
| 1209 | |
| 1210 | if (devfs_get_cdevpriv((void **)&cpd) != 0 || |
| 1211 | usb_ref_device(cpd, &refs, 0) != 0) |
| 1212 | return (events & |
| 1213 | (POLLHUP|POLLIN|POLLRDNORM|POLLOUT|POLLWRNORM)); |
| 1214 | |
| 1215 | fflags = cpd->fflags; |
| 1216 | |
| 1217 | /* Figure out who needs service */ |
| 1218 | revents = 0; |
| 1219 | if ((events & (POLLOUT | POLLWRNORM)) && |
| 1220 | (fflags & FWRITE)) { |
| 1221 | |
| 1222 | f = refs.txfifo; |
| 1223 | |
| 1224 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 1225 | |
| 1226 | if (!refs.is_usbfs) { |
| 1227 | if (f->flag_iserror) { |
| 1228 | /* we got an error */ |
| 1229 | m = (void *)1; |
| 1230 | } else { |
| 1231 | if (f->queue_data == NULL) { |
| 1232 | /* |
| 1233 | * start write transfer, if not |
| 1234 | * already started |
| 1235 | */ |
| 1236 | (f->methods->f_start_write) (f); |
| 1237 | } |
| 1238 | /* check if any packets are available */ |
| 1239 | USB_IF_POLL(&f->free_q, m); |
| 1240 | } |
| 1241 | } else { |
| 1242 | if (f->flag_iscomplete) { |
| 1243 | m = (void *)1; |
| 1244 | } else { |
| 1245 | m = NULL; |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | if (m) { |
| 1250 | revents |= events & (POLLOUT | POLLWRNORM); |
| 1251 | } else { |
| 1252 | f->flag_isselect = 1; |
| 1253 | selrecord(td, &f->selinfo); |
| 1254 | } |
| 1255 | |
| 1256 | lockmgr(f->priv_lock); |
| 1257 | } |
| 1258 | if ((events & (POLLIN | POLLRDNORM)) && |
| 1259 | (fflags & FREAD)) { |
| 1260 | |
| 1261 | f = refs.rxfifo; |
| 1262 | |
| 1263 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 1264 | |
| 1265 | if (!refs.is_usbfs) { |
| 1266 | if (f->flag_iserror) { |
| 1267 | /* we have and error */ |
| 1268 | m = (void *)1; |
| 1269 | } else { |
| 1270 | if (f->queue_data == NULL) { |
| 1271 | /* |
| 1272 | * start read transfer, if not |
| 1273 | * already started |
| 1274 | */ |
| 1275 | (f->methods->f_start_read) (f); |
| 1276 | } |
| 1277 | /* check if any packets are available */ |
| 1278 | USB_IF_POLL(&f->used_q, m); |
| 1279 | } |
| 1280 | } else { |
| 1281 | if (f->flag_iscomplete) { |
| 1282 | m = (void *)1; |
| 1283 | } else { |
| 1284 | m = NULL; |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | if (m) { |
| 1289 | revents |= events & (POLLIN | POLLRDNORM); |
| 1290 | } else { |
| 1291 | f->flag_isselect = 1; |
| 1292 | selrecord(td, &f->selinfo); |
| 1293 | |
| 1294 | if (!refs.is_usbfs) { |
| 1295 | /* start reading data */ |
| 1296 | (f->methods->f_start_read) (f); |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | lockmgr(f->priv_lock, LK_RELEASE); |
| 1301 | } |
| 1302 | usb_unref_device(cpd, &refs); |
| 1303 | return (revents); |
| 1304 | } |
| 1305 | #endif |
| 1306 | |
| 1307 | static int |
| 1308 | usb_read(struct dev_read_args *ap) |
| 1309 | { |
| 1310 | struct cdev *dev = ap->a_head.a_dev; |
| 1311 | struct uio *uio = ap->a_uio; |
| 1312 | int ioflag = ap->a_ioflag; |
| 1313 | struct usb_cdev_refdata refs; |
| 1314 | struct usb_cdev_privdata* cpd; |
| 1315 | struct usb_fifo *f; |
| 1316 | struct usb_mbuf *m; |
| 1317 | int fflags; |
| 1318 | int resid; |
| 1319 | int io_len; |
| 1320 | int err; |
| 1321 | uint8_t tr_data = 0; |
| 1322 | |
| 1323 | #if 0 |
| 1324 | err = devfs_get_cdevpriv((void **)&cpd); |
| 1325 | if (err != 0) |
| 1326 | return (err); |
| 1327 | #endif |
| 1328 | |
| 1329 | if(dev->si_drv2 == NULL) |
| 1330 | return(-1); |
| 1331 | |
| 1332 | cpd = (struct usb_cdev_privdata *)dev->si_drv2; |
| 1333 | |
| 1334 | err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); |
| 1335 | if (err) { |
| 1336 | return (ENXIO); |
| 1337 | } |
| 1338 | fflags = cpd->fflags; |
| 1339 | |
| 1340 | f = refs.rxfifo; |
| 1341 | if (f == NULL) { |
| 1342 | /* should not happen */ |
| 1343 | usb_unref_device(cpd, &refs); |
| 1344 | return (EPERM); |
| 1345 | } |
| 1346 | |
| 1347 | resid = uio->uio_resid; |
| 1348 | |
| 1349 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 1350 | |
| 1351 | /* check for permanent read error */ |
| 1352 | if (f->flag_iserror) { |
| 1353 | err = EIO; |
| 1354 | goto done; |
| 1355 | } |
| 1356 | /* check if USB-FS interface is active */ |
| 1357 | if (refs.is_usbfs) { |
| 1358 | /* |
| 1359 | * The queue is used for events that should be |
| 1360 | * retrieved using the "USB_FS_COMPLETE" ioctl. |
| 1361 | */ |
| 1362 | err = EINVAL; |
| 1363 | goto done; |
| 1364 | } |
| 1365 | while (uio->uio_resid > 0) { |
| 1366 | |
| 1367 | USB_IF_DEQUEUE(&f->used_q, m); |
| 1368 | |
| 1369 | if (m == NULL) { |
| 1370 | |
| 1371 | /* start read transfer, if not already started */ |
| 1372 | |
| 1373 | (f->methods->f_start_read) (f); |
| 1374 | |
| 1375 | if (ioflag & IO_NDELAY) { |
| 1376 | if (tr_data) { |
| 1377 | /* return length before error */ |
| 1378 | break; |
| 1379 | } |
| 1380 | err = EWOULDBLOCK; |
| 1381 | break; |
| 1382 | } |
| 1383 | DPRINTF("sleeping\n"); |
| 1384 | |
| 1385 | err = usb_fifo_wait(f); |
| 1386 | if (err) { |
| 1387 | break; |
| 1388 | } |
| 1389 | continue; |
| 1390 | } |
| 1391 | if (f->methods->f_filter_read) { |
| 1392 | /* |
| 1393 | * Sometimes it is convenient to process data at the |
| 1394 | * expense of a userland process instead of a kernel |
| 1395 | * process. |
| 1396 | */ |
| 1397 | (f->methods->f_filter_read) (f, m); |
| 1398 | } |
| 1399 | tr_data = 1; |
| 1400 | |
| 1401 | io_len = MIN(m->cur_data_len, uio->uio_resid); |
| 1402 | |
| 1403 | DPRINTFN(2, "transfer %d bytes from %p\n", |
| 1404 | io_len, m->cur_data_ptr); |
| 1405 | |
| 1406 | err = usb_fifo_uiomove(f, |
| 1407 | m->cur_data_ptr, io_len, uio); |
| 1408 | |
| 1409 | m->cur_data_len -= io_len; |
| 1410 | m->cur_data_ptr += io_len; |
| 1411 | |
| 1412 | if (m->cur_data_len == 0) { |
| 1413 | |
| 1414 | uint8_t last_packet; |
| 1415 | |
| 1416 | last_packet = m->last_packet; |
| 1417 | |
| 1418 | USB_IF_ENQUEUE(&f->free_q, m); |
| 1419 | |
| 1420 | if (last_packet) { |
| 1421 | /* keep framing */ |
| 1422 | break; |
| 1423 | } |
| 1424 | } else { |
| 1425 | USB_IF_PREPEND(&f->used_q, m); |
| 1426 | } |
| 1427 | |
| 1428 | if (err) { |
| 1429 | break; |
| 1430 | } |
| 1431 | } |
| 1432 | done: |
| 1433 | lockmgr(f->priv_lock, LK_RELEASE); |
| 1434 | |
| 1435 | usb_unref_device(cpd, &refs); |
| 1436 | |
| 1437 | return (err); |
| 1438 | } |
| 1439 | |
| 1440 | static int |
| 1441 | usb_write(struct dev_write_args *ap) |
| 1442 | { |
| 1443 | struct cdev *dev = ap->a_head.a_dev; |
| 1444 | struct uio *uio = ap->a_uio; |
| 1445 | int ioflag = ap->a_ioflag; |
| 1446 | struct usb_cdev_refdata refs; |
| 1447 | struct usb_cdev_privdata* cpd; |
| 1448 | struct usb_fifo *f; |
| 1449 | struct usb_mbuf *m; |
| 1450 | uint8_t *pdata; |
| 1451 | int fflags; |
| 1452 | int resid; |
| 1453 | int io_len; |
| 1454 | int err; |
| 1455 | uint8_t tr_data = 0; |
| 1456 | |
| 1457 | DPRINTFN(2, "\n"); |
| 1458 | |
| 1459 | #if 0 /* XXXDF */ |
| 1460 | err = devfs_get_cdevpriv((void **)&cpd); |
| 1461 | if (err != 0) |
| 1462 | return (err); |
| 1463 | #endif |
| 1464 | |
| 1465 | if(dev->si_drv2 == NULL) |
| 1466 | return(-1); |
| 1467 | |
| 1468 | cpd = (struct usb_cdev_privdata *)dev->si_drv2; |
| 1469 | |
| 1470 | err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); |
| 1471 | if (err) { |
| 1472 | return (ENXIO); |
| 1473 | } |
| 1474 | fflags = cpd->fflags; |
| 1475 | |
| 1476 | f = refs.txfifo; |
| 1477 | if (f == NULL) { |
| 1478 | /* should not happen */ |
| 1479 | usb_unref_device(cpd, &refs); |
| 1480 | return (EPERM); |
| 1481 | } |
| 1482 | resid = uio->uio_resid; |
| 1483 | |
| 1484 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 1485 | |
| 1486 | /* check for permanent write error */ |
| 1487 | if (f->flag_iserror) { |
| 1488 | err = EIO; |
| 1489 | goto done; |
| 1490 | } |
| 1491 | /* check if USB-FS interface is active */ |
| 1492 | if (refs.is_usbfs) { |
| 1493 | /* |
| 1494 | * The queue is used for events that should be |
| 1495 | * retrieved using the "USB_FS_COMPLETE" ioctl. |
| 1496 | */ |
| 1497 | err = EINVAL; |
| 1498 | goto done; |
| 1499 | } |
| 1500 | if (f->queue_data == NULL) { |
| 1501 | /* start write transfer, if not already started */ |
| 1502 | (f->methods->f_start_write) (f); |
| 1503 | } |
| 1504 | /* we allow writing zero length data */ |
| 1505 | do { |
| 1506 | USB_IF_DEQUEUE(&f->free_q, m); |
| 1507 | |
| 1508 | if (m == NULL) { |
| 1509 | |
| 1510 | if (ioflag & IO_NDELAY) { |
| 1511 | if (tr_data) { |
| 1512 | /* return length before error */ |
| 1513 | break; |
| 1514 | } |
| 1515 | err = EWOULDBLOCK; |
| 1516 | break; |
| 1517 | } |
| 1518 | DPRINTF("sleeping\n"); |
| 1519 | |
| 1520 | err = usb_fifo_wait(f); |
| 1521 | if (err) { |
| 1522 | break; |
| 1523 | } |
| 1524 | continue; |
| 1525 | } |
| 1526 | tr_data = 1; |
| 1527 | |
| 1528 | if (f->flag_have_fragment == 0) { |
| 1529 | USB_MBUF_RESET(m); |
| 1530 | io_len = m->cur_data_len; |
| 1531 | pdata = m->cur_data_ptr; |
| 1532 | if (io_len > uio->uio_resid) |
| 1533 | io_len = uio->uio_resid; |
| 1534 | m->cur_data_len = io_len; |
| 1535 | } else { |
| 1536 | io_len = m->max_data_len - m->cur_data_len; |
| 1537 | pdata = m->cur_data_ptr + m->cur_data_len; |
| 1538 | if (io_len > uio->uio_resid) |
| 1539 | io_len = uio->uio_resid; |
| 1540 | m->cur_data_len += io_len; |
| 1541 | } |
| 1542 | |
| 1543 | DPRINTFN(2, "transfer %d bytes to %p\n", |
| 1544 | io_len, pdata); |
| 1545 | |
| 1546 | err = usb_fifo_uiomove(f, pdata, io_len, uio); |
| 1547 | |
| 1548 | if (err) { |
| 1549 | f->flag_have_fragment = 0; |
| 1550 | USB_IF_ENQUEUE(&f->free_q, m); |
| 1551 | break; |
| 1552 | } |
| 1553 | |
| 1554 | /* check if the buffer is ready to be transmitted */ |
| 1555 | |
| 1556 | if ((f->flag_write_defrag == 0) || |
| 1557 | (m->cur_data_len == m->max_data_len)) { |
| 1558 | f->flag_have_fragment = 0; |
| 1559 | |
| 1560 | /* |
| 1561 | * Check for write filter: |
| 1562 | * |
| 1563 | * Sometimes it is convenient to process data |
| 1564 | * at the expense of a userland process |
| 1565 | * instead of a kernel process. |
| 1566 | */ |
| 1567 | if (f->methods->f_filter_write) { |
| 1568 | (f->methods->f_filter_write) (f, m); |
| 1569 | } |
| 1570 | |
| 1571 | /* Put USB mbuf in the used queue */ |
| 1572 | USB_IF_ENQUEUE(&f->used_q, m); |
| 1573 | |
| 1574 | /* Start writing data, if not already started */ |
| 1575 | (f->methods->f_start_write) (f); |
| 1576 | } else { |
| 1577 | /* Wait for more data or close */ |
| 1578 | f->flag_have_fragment = 1; |
| 1579 | USB_IF_PREPEND(&f->free_q, m); |
| 1580 | } |
| 1581 | |
| 1582 | } while (uio->uio_resid > 0); |
| 1583 | done: |
| 1584 | lockmgr(f->priv_lock, LK_RELEASE); |
| 1585 | |
| 1586 | usb_unref_device(cpd, &refs); |
| 1587 | |
| 1588 | return (err); |
| 1589 | } |
| 1590 | |
| 1591 | |
| 1592 | static int |
| 1593 | usb_static_open(struct dev_open_args *ap) |
| 1594 | { |
| 1595 | return(0); |
| 1596 | } |
| 1597 | |
| 1598 | static int |
| 1599 | usb_static_close(struct dev_close_args *ap) |
| 1600 | { |
| 1601 | return(0); |
| 1602 | } |
| 1603 | |
| 1604 | int |
| 1605 | usb_static_ioctl(struct dev_ioctl_args *ap) |
| 1606 | { |
| 1607 | u_long cmd = ap->a_cmd; |
| 1608 | caddr_t data = ap->a_data; |
| 1609 | struct thread *td = curthread; /* XXX: curthread the correct choice? */ |
| 1610 | int fflag = ap->a_fflag; |
| 1611 | union { |
| 1612 | struct usb_read_dir *urd; |
| 1613 | void* data; |
| 1614 | } u; |
| 1615 | int err; |
| 1616 | |
| 1617 | u.data = data; |
| 1618 | switch (cmd) { |
| 1619 | case USB_READ_DIR: |
| 1620 | err = usb_read_symlink(u.urd->urd_data, |
| 1621 | u.urd->urd_startentry, u.urd->urd_maxlen); |
| 1622 | break; |
| 1623 | case USB_DEV_QUIRK_GET: |
| 1624 | case USB_QUIRK_NAME_GET: |
| 1625 | case USB_DEV_QUIRK_ADD: |
| 1626 | case USB_DEV_QUIRK_REMOVE: |
| 1627 | err = usb_quirk_ioctl_p(cmd, data, fflag, td); |
| 1628 | break; |
| 1629 | case USB_GET_TEMPLATE: |
| 1630 | *(int *)data = usb_template; |
| 1631 | err = 0; |
| 1632 | break; |
| 1633 | case USB_SET_TEMPLATE: |
| 1634 | err = priv_check(curthread, PRIV_DRIVER); |
| 1635 | if (err) |
| 1636 | break; |
| 1637 | usb_template = *(int *)data; |
| 1638 | break; |
| 1639 | default: |
| 1640 | err = ENOTTY; |
| 1641 | break; |
| 1642 | } |
| 1643 | return (err); |
| 1644 | } |
| 1645 | |
| 1646 | static int |
| 1647 | usb_fifo_uiomove(struct usb_fifo *f, void *cp, |
| 1648 | int n, struct uio *uio) |
| 1649 | { |
| 1650 | int error; |
| 1651 | |
| 1652 | lockmgr(f->priv_lock, LK_RELEASE); |
| 1653 | |
| 1654 | /* |
| 1655 | * "uiomove()" can sleep so one needs to make a wrapper, |
| 1656 | * exiting the mutex and checking things: |
| 1657 | */ |
| 1658 | error = uiomove(cp, n, uio); |
| 1659 | |
| 1660 | lockmgr(f->priv_lock, LK_EXCLUSIVE); |
| 1661 | |
| 1662 | return (error); |
| 1663 | } |
| 1664 | |
| 1665 | int |
| 1666 | usb_fifo_wait(struct usb_fifo *f) |
| 1667 | { |
| 1668 | int err; |
| 1669 | |
| 1670 | KKASSERT(lockowned(f->priv_lock)); |
| 1671 | |
| 1672 | if (f->flag_iserror) { |
| 1673 | /* we are gone */ |
| 1674 | return (EIO); |
| 1675 | } |
| 1676 | f->flag_sleeping = 1; |
| 1677 | |
| 1678 | err = cv_wait_sig(&f->cv_io, f->priv_lock); |
| 1679 | |
| 1680 | if (f->flag_iserror) { |
| 1681 | /* we are gone */ |
| 1682 | err = EIO; |
| 1683 | } |
| 1684 | return (err); |
| 1685 | } |
| 1686 | |
| 1687 | void |
| 1688 | usb_fifo_signal(struct usb_fifo *f) |
| 1689 | { |
| 1690 | if (f->flag_sleeping) { |
| 1691 | f->flag_sleeping = 0; |
| 1692 | cv_broadcast(&f->cv_io); |
| 1693 | } |
| 1694 | } |
| 1695 | |
| 1696 | void |
| 1697 | usb_fifo_wakeup(struct usb_fifo *f) |
| 1698 | { |
| 1699 | usb_fifo_signal(f); |
| 1700 | |
| 1701 | if (f->flag_isselect) { |
| 1702 | #if 0 /* XXXDF */ |
| 1703 | selwakeup(&f->selinfo); |
| 1704 | #endif |
| 1705 | f->flag_isselect = 0; |
| 1706 | } |
| 1707 | if (f->async_p != NULL && lwkt_trytoken(&f->async_p->p_token)) { |
| 1708 | ksignal(f->async_p, SIGIO); |
| 1709 | lwkt_reltoken(&f->async_p->p_token); |
| 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | static int |
| 1714 | usb_fifo_dummy_open(struct usb_fifo *fifo, int fflags) |
| 1715 | { |
| 1716 | return (0); |
| 1717 | } |
| 1718 | |
| 1719 | static void |
| 1720 | usb_fifo_dummy_close(struct usb_fifo *fifo, int fflags) |
| 1721 | { |
| 1722 | return; |
| 1723 | } |
| 1724 | |
| 1725 | static int |
| 1726 | usb_fifo_dummy_ioctl(struct usb_fifo *fifo, u_long cmd, void *addr, int fflags) |
| 1727 | { |
| 1728 | return (ENOIOCTL); |
| 1729 | } |
| 1730 | |
| 1731 | static void |
| 1732 | usb_fifo_dummy_cmd(struct usb_fifo *fifo) |
| 1733 | { |
| 1734 | fifo->flag_flushing = 0; /* not flushing */ |
| 1735 | } |
| 1736 | |
| 1737 | static void |
| 1738 | usb_fifo_check_methods(struct usb_fifo_methods *pm) |
| 1739 | { |
| 1740 | /* check that all callback functions are OK */ |
| 1741 | |
| 1742 | if (pm->f_open == NULL) |
| 1743 | pm->f_open = &usb_fifo_dummy_open; |
| 1744 | |
| 1745 | if (pm->f_close == NULL) |
| 1746 | pm->f_close = &usb_fifo_dummy_close; |
| 1747 | |
| 1748 | if (pm->f_ioctl == NULL) |
| 1749 | pm->f_ioctl = &usb_fifo_dummy_ioctl; |
| 1750 | |
| 1751 | if (pm->f_ioctl_post == NULL) |
| 1752 | pm->f_ioctl_post = &usb_fifo_dummy_ioctl; |
| 1753 | |
| 1754 | if (pm->f_start_read == NULL) |
| 1755 | pm->f_start_read = &usb_fifo_dummy_cmd; |
| 1756 | |
| 1757 | if (pm->f_stop_read == NULL) |
| 1758 | pm->f_stop_read = &usb_fifo_dummy_cmd; |
| 1759 | |
| 1760 | if (pm->f_start_write == NULL) |
| 1761 | pm->f_start_write = &usb_fifo_dummy_cmd; |
| 1762 | |
| 1763 | if (pm->f_stop_write == NULL) |
| 1764 | pm->f_stop_write = &usb_fifo_dummy_cmd; |
| 1765 | } |
| 1766 | |
| 1767 | /*------------------------------------------------------------------------* |
| 1768 | * usb_fifo_attach |
| 1769 | * |
| 1770 | * The following function will create a duplex FIFO. |
| 1771 | * |
| 1772 | * Return values: |
| 1773 | * 0: Success. |
| 1774 | * Else: Failure. |
| 1775 | *------------------------------------------------------------------------*/ |
| 1776 | int |
| 1777 | usb_fifo_attach(struct usb_device *udev, void *priv_sc, |
| 1778 | struct lock *priv_lock, struct usb_fifo_methods *pm, |
| 1779 | struct usb_fifo_sc *f_sc, uint16_t unit, uint16_t subunit, |
| 1780 | uint8_t iface_index, uid_t uid, gid_t gid, int mode) |
| 1781 | { |
| 1782 | struct usb_fifo *f_tx; |
| 1783 | struct usb_fifo *f_rx; |
| 1784 | char devname[32]; |
| 1785 | uint8_t n; |
| 1786 | |
| 1787 | f_sc->fp[USB_FIFO_TX] = NULL; |
| 1788 | f_sc->fp[USB_FIFO_RX] = NULL; |
| 1789 | |
| 1790 | if (pm == NULL) |
| 1791 | return (EINVAL); |
| 1792 | |
| 1793 | /* check the methods */ |
| 1794 | usb_fifo_check_methods(pm); |
| 1795 | |
| 1796 | /* search for a free FIFO slot */ |
| 1797 | for (n = 0;; n += 2) { |
| 1798 | |
| 1799 | if (n == USB_FIFO_MAX) { |
| 1800 | /* end of FIFOs reached */ |
| 1801 | return (ENOMEM); |
| 1802 | } |
| 1803 | /* Check for TX FIFO */ |
| 1804 | if (udev->fifo[n + USB_FIFO_TX] != NULL) { |
| 1805 | continue; |
| 1806 | } |
| 1807 | /* Check for RX FIFO */ |
| 1808 | if (udev->fifo[n + USB_FIFO_RX] != NULL) { |
| 1809 | continue; |
| 1810 | } |
| 1811 | break; |
| 1812 | } |
| 1813 | |
| 1814 | f_tx = usb_fifo_alloc(); |
| 1815 | f_rx = usb_fifo_alloc(); |
| 1816 | |
| 1817 | if ((f_tx == NULL) || (f_rx == NULL)) { |
| 1818 | usb_fifo_free(f_tx); |
| 1819 | usb_fifo_free(f_rx); |
| 1820 | return (ENOMEM); |
| 1821 | } |
| 1822 | /* initialise FIFO structures */ |
| 1823 | |
| 1824 | f_tx->fifo_index = n + USB_FIFO_TX; |
| 1825 | f_tx->dev_ep_index = -1; |
| 1826 | f_tx->priv_lock = priv_lock; |
| 1827 | f_tx->priv_sc0 = priv_sc; |
| 1828 | f_tx->methods = pm; |
| 1829 | f_tx->iface_index = iface_index; |
| 1830 | f_tx->udev = udev; |
| 1831 | |
| 1832 | f_rx->fifo_index = n + USB_FIFO_RX; |
| 1833 | f_rx->dev_ep_index = -1; |
| 1834 | f_rx->priv_lock = priv_lock; |
| 1835 | f_rx->priv_sc0 = priv_sc; |
| 1836 | f_rx->methods = pm; |
| 1837 | f_rx->iface_index = iface_index; |
| 1838 | f_rx->udev = udev; |
| 1839 | |
| 1840 | f_sc->fp[USB_FIFO_TX] = f_tx; |
| 1841 | f_sc->fp[USB_FIFO_RX] = f_rx; |
| 1842 | |
| 1843 | lockmgr(&usb_ref_lock, LK_EXCLUSIVE); |
| 1844 | udev->fifo[f_tx->fifo_index] = f_tx; |
| 1845 | udev->fifo[f_rx->fifo_index] = f_rx; |
| 1846 | lockmgr(&usb_ref_lock, LK_RELEASE); |
| 1847 | |
| 1848 | for (n = 0; n != 4; n++) { |
| 1849 | |
| 1850 | if (pm->basename[n] == NULL) { |
| 1851 | continue; |
| 1852 | } |
| 1853 | if (subunit == 0xFFFF) { |
| 1854 | if (ksnprintf(devname, sizeof(devname), |
| 1855 | "%s%u%s", pm->basename[n], |
| 1856 | unit, pm->postfix[n] ? |
| 1857 | pm->postfix[n] : "")) { |
| 1858 | /* ignore */ |
| 1859 | } |
| 1860 | } else { |
| 1861 | if (ksnprintf(devname, sizeof(devname), |
| 1862 | "%s%u.%u%s", pm->basename[n], |
| 1863 | unit, subunit, pm->postfix[n] ? |
| 1864 | pm->postfix[n] : "")) { |
| 1865 | /* ignore */ |
| 1866 | } |
| 1867 | } |
| 1868 | |
| 1869 | /* |
| 1870 | * Distribute the symbolic links into two FIFO structures: |
| 1871 | */ |
| 1872 | if (n & 1) { |
| 1873 | f_rx->symlink[n / 2] = |
| 1874 | usb_alloc_symlink(devname); |
| 1875 | } else { |
| 1876 | f_tx->symlink[n / 2] = |
| 1877 | usb_alloc_symlink(devname); |
| 1878 | } |
| 1879 | |
| 1880 | /* Create the device */ |
| 1881 | f_sc->dev = usb_make_dev(udev, devname, -1, |
| 1882 | f_tx->fifo_index & f_rx->fifo_index, |
| 1883 | FREAD|FWRITE, uid, gid, mode); |
| 1884 | } |
| 1885 | |
| 1886 | DPRINTFN(2, "attached %p/%p\n", f_tx, f_rx); |
| 1887 | return (0); |
| 1888 | } |
| 1889 | |
| 1890 | /*------------------------------------------------------------------------* |
| 1891 | * usb_fifo_alloc_buffer |
| 1892 | * |
| 1893 | * Return values: |
| 1894 | * 0: Success |
| 1895 | * Else failure |
| 1896 | *------------------------------------------------------------------------*/ |
| 1897 | int |
| 1898 | usb_fifo_alloc_buffer(struct usb_fifo *f, usb_size_t bufsize, |
| 1899 | uint16_t nbuf) |
| 1900 | { |
| 1901 | usb_fifo_free_buffer(f); |
| 1902 | |
| 1903 | /* allocate an endpoint */ |
| 1904 | f->free_q.ifq_maxlen = nbuf; |
| 1905 | f->used_q.ifq_maxlen = nbuf; |
| 1906 | |
| 1907 | f->queue_data = usb_alloc_mbufs( |
| 1908 | M_USBDEV, &f->free_q, bufsize, nbuf); |
| 1909 | |
| 1910 | if ((f->queue_data == NULL) && bufsize && nbuf) { |
| 1911 | return (ENOMEM); |
| 1912 | } |
| 1913 | return (0); /* success */ |
| 1914 | } |
| 1915 | |
| 1916 | /*------------------------------------------------------------------------* |
| 1917 | * usb_fifo_free_buffer |
| 1918 | * |
| 1919 | * This function will free the buffers associated with a FIFO. This |
| 1920 | * function can be called multiple times in a row. |
| 1921 | *------------------------------------------------------------------------*/ |
| 1922 | void |
| 1923 | usb_fifo_free_buffer(struct usb_fifo *f) |
| 1924 | { |
| 1925 | if (f->queue_data) { |
| 1926 | /* free old buffer */ |
| 1927 | kfree(f->queue_data, M_USBDEV); |
| 1928 | f->queue_data = NULL; |
| 1929 | } |
| 1930 | /* reset queues */ |
| 1931 | |
| 1932 | memset(&f->free_q, 0, sizeof(f->free_q)); |
| 1933 | memset(&f->used_q, 0, sizeof(f->used_q)); |
| 1934 | } |
| 1935 | |
| 1936 | void |
| 1937 | usb_fifo_detach(struct usb_fifo_sc *f_sc) |
| 1938 | { |
| 1939 | if (f_sc == NULL) { |
| 1940 | return; |
| 1941 | } |
| 1942 | usb_fifo_free(f_sc->fp[USB_FIFO_TX]); |
| 1943 | usb_fifo_free(f_sc->fp[USB_FIFO_RX]); |
| 1944 | |
| 1945 | f_sc->fp[USB_FIFO_TX] = NULL; |
| 1946 | f_sc->fp[USB_FIFO_RX] = NULL; |
| 1947 | |
| 1948 | usb_destroy_dev(f_sc->dev); |
| 1949 | |
| 1950 | f_sc->dev = NULL; |
| 1951 | |
| 1952 | DPRINTFN(2, "detached %p\n", f_sc); |
| 1953 | } |
| 1954 | |
| 1955 | usb_size_t |
| 1956 | usb_fifo_put_bytes_max(struct usb_fifo *f) |
| 1957 | { |
| 1958 | struct usb_mbuf *m; |
| 1959 | usb_size_t len; |
| 1960 | |
| 1961 | USB_IF_POLL(&f->free_q, m); |
| 1962 | |
| 1963 | if (m) { |
| 1964 | len = m->max_data_len; |
| 1965 | } else { |
| 1966 | len = 0; |
| 1967 | } |
| 1968 | return (len); |
| 1969 | } |
| 1970 | |
| 1971 | /*------------------------------------------------------------------------* |
| 1972 | * usb_fifo_put_data |
| 1973 | * |
| 1974 | * what: |
| 1975 | * 0 - normal operation |
| 1976 | * 1 - set last packet flag to enforce framing |
| 1977 | *------------------------------------------------------------------------*/ |
| 1978 | void |
| 1979 | usb_fifo_put_data(struct usb_fifo *f, struct usb_page_cache *pc, |
| 1980 | usb_frlength_t offset, usb_frlength_t len, uint8_t what) |
| 1981 | { |
| 1982 | struct usb_mbuf *m; |
| 1983 | usb_frlength_t io_len; |
| 1984 | |
| 1985 | while (len || (what == 1)) { |
| 1986 | |
| 1987 | USB_IF_DEQUEUE(&f->free_q, m); |
| 1988 | |
| 1989 | if (m) { |
| 1990 | USB_MBUF_RESET(m); |
| 1991 | |
| 1992 | io_len = MIN(len, m->cur_data_len); |
| 1993 | |
| 1994 | usbd_copy_out(pc, offset, m->cur_data_ptr, io_len); |
| 1995 | |
| 1996 | m->cur_data_len = io_len; |
| 1997 | offset += io_len; |
| 1998 | len -= io_len; |
| 1999 | |
| 2000 | if ((len == 0) && (what == 1)) { |
| 2001 | m->last_packet = 1; |
| 2002 | } |
| 2003 | USB_IF_ENQUEUE(&f->used_q, m); |
| 2004 | |
| 2005 | usb_fifo_wakeup(f); |
| 2006 | |
| 2007 | if ((len == 0) || (what == 1)) { |
| 2008 | break; |
| 2009 | } |
| 2010 | } else { |
| 2011 | break; |
| 2012 | } |
| 2013 | } |
| 2014 | } |
| 2015 | |
| 2016 | void |
| 2017 | usb_fifo_put_data_linear(struct usb_fifo *f, void *ptr, |
| 2018 | usb_size_t len, uint8_t what) |
| 2019 | { |
| 2020 | struct usb_mbuf *m; |
| 2021 | usb_size_t io_len; |
| 2022 | |
| 2023 | while (len || (what == 1)) { |
| 2024 | |
| 2025 | USB_IF_DEQUEUE(&f->free_q, m); |
| 2026 | |
| 2027 | if (m) { |
| 2028 | USB_MBUF_RESET(m); |
| 2029 | |
| 2030 | io_len = MIN(len, m->cur_data_len); |
| 2031 | |
| 2032 | memcpy(m->cur_data_ptr, ptr, io_len); |
| 2033 | |
| 2034 | m->cur_data_len = io_len; |
| 2035 | ptr = USB_ADD_BYTES(ptr, io_len); |
| 2036 | len -= io_len; |
| 2037 | |
| 2038 | if ((len == 0) && (what == 1)) { |
| 2039 | m->last_packet = 1; |
| 2040 | } |
| 2041 | USB_IF_ENQUEUE(&f->used_q, m); |
| 2042 | |
| 2043 | usb_fifo_wakeup(f); |
| 2044 | |
| 2045 | if ((len == 0) || (what == 1)) { |
| 2046 | break; |
| 2047 | } |
| 2048 | } else { |
| 2049 | break; |
| 2050 | } |
| 2051 | } |
| 2052 | } |
| 2053 | |
| 2054 | uint8_t |
| 2055 | usb_fifo_put_data_buffer(struct usb_fifo *f, void *ptr, usb_size_t len) |
| 2056 | { |
| 2057 | struct usb_mbuf *m; |
| 2058 | |
| 2059 | USB_IF_DEQUEUE(&f->free_q, m); |
| 2060 | |
| 2061 | if (m) { |
| 2062 | m->cur_data_len = len; |
| 2063 | m->cur_data_ptr = ptr; |
| 2064 | USB_IF_ENQUEUE(&f->used_q, m); |
| 2065 | usb_fifo_wakeup(f); |
| 2066 | return (1); |
| 2067 | } |
| 2068 | return (0); |
| 2069 | } |
| 2070 | |
| 2071 | void |
| 2072 | usb_fifo_put_data_error(struct usb_fifo *f) |
| 2073 | { |
| 2074 | f->flag_iserror = 1; |
| 2075 | usb_fifo_wakeup(f); |
| 2076 | } |
| 2077 | |
| 2078 | /*------------------------------------------------------------------------* |
| 2079 | * usb_fifo_get_data |
| 2080 | * |
| 2081 | * what: |
| 2082 | * 0 - normal operation |
| 2083 | * 1 - only get one "usb_mbuf" |
| 2084 | * |
| 2085 | * returns: |
| 2086 | * 0 - no more data |
| 2087 | * 1 - data in buffer |
| 2088 | *------------------------------------------------------------------------*/ |
| 2089 | uint8_t |
| 2090 | usb_fifo_get_data(struct usb_fifo *f, struct usb_page_cache *pc, |
| 2091 | usb_frlength_t offset, usb_frlength_t len, usb_frlength_t *actlen, |
| 2092 | uint8_t what) |
| 2093 | { |
| 2094 | struct usb_mbuf *m; |
| 2095 | usb_frlength_t io_len; |
| 2096 | uint8_t tr_data = 0; |
| 2097 | |
| 2098 | actlen[0] = 0; |
| 2099 | |
| 2100 | while (1) { |
| 2101 | |
| 2102 | USB_IF_DEQUEUE(&f->used_q, m); |
| 2103 | |
| 2104 | if (m) { |
| 2105 | |
| 2106 | tr_data = 1; |
| 2107 | |
| 2108 | io_len = MIN(len, m->cur_data_len); |
| 2109 | |
| 2110 | usbd_copy_in(pc, offset, m->cur_data_ptr, io_len); |
| 2111 | |
| 2112 | len -= io_len; |
| 2113 | offset += io_len; |
| 2114 | actlen[0] += io_len; |
| 2115 | m->cur_data_ptr += io_len; |
| 2116 | m->cur_data_len -= io_len; |
| 2117 | |
| 2118 | if ((m->cur_data_len == 0) || (what == 1)) { |
| 2119 | USB_IF_ENQUEUE(&f->free_q, m); |
| 2120 | |
| 2121 | usb_fifo_wakeup(f); |
| 2122 | |
| 2123 | if (what == 1) { |
| 2124 | break; |
| 2125 | } |
| 2126 | } else { |
| 2127 | USB_IF_PREPEND(&f->used_q, m); |
| 2128 | } |
| 2129 | } else { |
| 2130 | |
| 2131 | if (tr_data) { |
| 2132 | /* wait for data to be written out */ |
| 2133 | break; |
| 2134 | } |
| 2135 | if (f->flag_flushing) { |
| 2136 | /* check if we should send a short packet */ |
| 2137 | if (f->flag_short != 0) { |
| 2138 | f->flag_short = 0; |
| 2139 | tr_data = 1; |
| 2140 | break; |
| 2141 | } |
| 2142 | /* flushing complete */ |
| 2143 | f->flag_flushing = 0; |
| 2144 | usb_fifo_wakeup(f); |
| 2145 | } |
| 2146 | break; |
| 2147 | } |
| 2148 | if (len == 0) { |
| 2149 | break; |
| 2150 | } |
| 2151 | } |
| 2152 | return (tr_data); |
| 2153 | } |
| 2154 | |
| 2155 | uint8_t |
| 2156 | usb_fifo_get_data_linear(struct usb_fifo *f, void *ptr, |
| 2157 | usb_size_t len, usb_size_t *actlen, uint8_t what) |
| 2158 | { |
| 2159 | struct usb_mbuf *m; |
| 2160 | usb_size_t io_len; |
| 2161 | uint8_t tr_data = 0; |
| 2162 | |
| 2163 | actlen[0] = 0; |
| 2164 | |
| 2165 | while (1) { |
| 2166 | |
| 2167 | USB_IF_DEQUEUE(&f->used_q, m); |
| 2168 | |
| 2169 | if (m) { |
| 2170 | |
| 2171 | tr_data = 1; |
| 2172 | |
| 2173 | io_len = MIN(len, m->cur_data_len); |
| 2174 | |
| 2175 | memcpy(ptr, m->cur_data_ptr, io_len); |
| 2176 | |
| 2177 | len -= io_len; |
| 2178 | ptr = USB_ADD_BYTES(ptr, io_len); |
| 2179 | actlen[0] += io_len; |
| 2180 | m->cur_data_ptr += io_len; |
| 2181 | m->cur_data_len -= io_len; |
| 2182 | |
| 2183 | if ((m->cur_data_len == 0) || (what == 1)) { |
| 2184 | USB_IF_ENQUEUE(&f->free_q, m); |
| 2185 | |
| 2186 | usb_fifo_wakeup(f); |
| 2187 | |
| 2188 | if (what == 1) { |
| 2189 | break; |
| 2190 | } |
| 2191 | } else { |
| 2192 | USB_IF_PREPEND(&f->used_q, m); |
| 2193 | } |
| 2194 | } else { |
| 2195 | |
| 2196 | if (tr_data) { |
| 2197 | /* wait for data to be written out */ |
| 2198 | break; |
| 2199 | } |
| 2200 | if (f->flag_flushing) { |
| 2201 | /* check if we should send a short packet */ |
| 2202 | if (f->flag_short != 0) { |
| 2203 | f->flag_short = 0; |
| 2204 | tr_data = 1; |
| 2205 | break; |
| 2206 | } |
| 2207 | /* flushing complete */ |
| 2208 | f->flag_flushing = 0; |
| 2209 | usb_fifo_wakeup(f); |
| 2210 | } |
| 2211 | break; |
| 2212 | } |
| 2213 | if (len == 0) { |
| 2214 | break; |
| 2215 | } |
| 2216 | } |
| 2217 | return (tr_data); |
| 2218 | } |
| 2219 | |
| 2220 | uint8_t |
| 2221 | usb_fifo_get_data_buffer(struct usb_fifo *f, void **pptr, usb_size_t *plen) |
| 2222 | { |
| 2223 | struct usb_mbuf *m; |
| 2224 | |
| 2225 | USB_IF_POLL(&f->used_q, m); |
| 2226 | |
| 2227 | if (m) { |
| 2228 | *plen = m->cur_data_len; |
| 2229 | *pptr = m->cur_data_ptr; |
| 2230 | |
| 2231 | return (1); |
| 2232 | } |
| 2233 | return (0); |
| 2234 | } |
| 2235 | |
| 2236 | void |
| 2237 | usb_fifo_get_data_error(struct usb_fifo *f) |
| 2238 | { |
| 2239 | f->flag_iserror = 1; |
| 2240 | usb_fifo_wakeup(f); |
| 2241 | } |
| 2242 | |
| 2243 | /*------------------------------------------------------------------------* |
| 2244 | * usb_alloc_symlink |
| 2245 | * |
| 2246 | * Return values: |
| 2247 | * NULL: Failure |
| 2248 | * Else: Pointer to symlink entry |
| 2249 | *------------------------------------------------------------------------*/ |
| 2250 | struct usb_symlink * |
| 2251 | usb_alloc_symlink(const char *target) |
| 2252 | { |
| 2253 | struct usb_symlink *ps; |
| 2254 | |
| 2255 | ps = kmalloc(sizeof(*ps), M_USBDEV, M_WAITOK); |
| 2256 | if (ps == NULL) { |
| 2257 | return (ps); |
| 2258 | } |
| 2259 | /* XXX no longer needed */ |
| 2260 | strlcpy(ps->src_path, target, sizeof(ps->src_path)); |
| 2261 | ps->src_len = strlen(ps->src_path); |
| 2262 | strlcpy(ps->dst_path, target, sizeof(ps->dst_path)); |
| 2263 | ps->dst_len = strlen(ps->dst_path); |
| 2264 | |
| 2265 | lockmgr(&usb_sym_lock, LK_EXCLUSIVE); |
| 2266 | TAILQ_INSERT_TAIL(&usb_sym_head, ps, sym_entry); |
| 2267 | lockmgr(&usb_sym_lock, LK_RELEASE); |
| 2268 | return (ps); |
| 2269 | } |
| 2270 | |
| 2271 | /*------------------------------------------------------------------------* |
| 2272 | * usb_free_symlink |
| 2273 | *------------------------------------------------------------------------*/ |
| 2274 | void |
| 2275 | usb_free_symlink(struct usb_symlink *ps) |
| 2276 | { |
| 2277 | if (ps == NULL) { |
| 2278 | return; |
| 2279 | } |
| 2280 | lockmgr(&usb_sym_lock, LK_EXCLUSIVE); |
| 2281 | TAILQ_REMOVE(&usb_sym_head, ps, sym_entry); |
| 2282 | lockmgr(&usb_sym_lock, LK_RELEASE); |
| 2283 | |
| 2284 | kfree(ps, M_USBDEV); |
| 2285 | } |
| 2286 | |
| 2287 | /*------------------------------------------------------------------------* |
| 2288 | * usb_read_symlink |
| 2289 | * |
| 2290 | * Return value: |
| 2291 | * 0: Success |
| 2292 | * Else: Failure |
| 2293 | *------------------------------------------------------------------------*/ |
| 2294 | int |
| 2295 | usb_read_symlink(uint8_t *user_ptr, uint32_t startentry, uint32_t user_len) |
| 2296 | { |
| 2297 | struct usb_symlink *ps; |
| 2298 | uint32_t temp; |
| 2299 | uint32_t delta = 0; |
| 2300 | uint8_t len; |
| 2301 | int error = 0; |
| 2302 | |
| 2303 | lockmgr(&usb_sym_lock, LK_EXCLUSIVE); |
| 2304 | |
| 2305 | TAILQ_FOREACH(ps, &usb_sym_head, sym_entry) { |
| 2306 | |
| 2307 | /* |
| 2308 | * Compute total length of source and destination symlink |
| 2309 | * strings pluss one length byte and two NUL bytes: |
| 2310 | */ |
| 2311 | temp = ps->src_len + ps->dst_len + 3; |
| 2312 | |
| 2313 | if (temp > 255) { |
| 2314 | /* |
| 2315 | * Skip entry because this length cannot fit |
| 2316 | * into one byte: |
| 2317 | */ |
| 2318 | continue; |
| 2319 | } |
| 2320 | if (startentry != 0) { |
| 2321 | /* decrement read offset */ |
| 2322 | startentry--; |
| 2323 | continue; |
| 2324 | } |
| 2325 | if (temp > user_len) { |
| 2326 | /* out of buffer space */ |
| 2327 | break; |
| 2328 | } |
| 2329 | len = temp; |
| 2330 | |
| 2331 | /* copy out total length */ |
| 2332 | |
| 2333 | error = copyout(&len, |
| 2334 | USB_ADD_BYTES(user_ptr, delta), 1); |
| 2335 | if (error) { |
| 2336 | break; |
| 2337 | } |
| 2338 | delta += 1; |
| 2339 | |
| 2340 | /* copy out source string */ |
| 2341 | |
| 2342 | error = copyout(ps->src_path, |
| 2343 | USB_ADD_BYTES(user_ptr, delta), ps->src_len); |
| 2344 | if (error) { |
| 2345 | break; |
| 2346 | } |
| 2347 | len = 0; |
| 2348 | delta += ps->src_len; |
| 2349 | error = copyout(&len, |
| 2350 | USB_ADD_BYTES(user_ptr, delta), 1); |
| 2351 | if (error) { |
| 2352 | break; |
| 2353 | } |
| 2354 | delta += 1; |
| 2355 | |
| 2356 | /* copy out destination string */ |
| 2357 | |
| 2358 | error = copyout(ps->dst_path, |
| 2359 | USB_ADD_BYTES(user_ptr, delta), ps->dst_len); |
| 2360 | if (error) { |
| 2361 | break; |
| 2362 | } |
| 2363 | len = 0; |
| 2364 | delta += ps->dst_len; |
| 2365 | error = copyout(&len, |
| 2366 | USB_ADD_BYTES(user_ptr, delta), 1); |
| 2367 | if (error) { |
| 2368 | break; |
| 2369 | } |
| 2370 | delta += 1; |
| 2371 | |
| 2372 | user_len -= temp; |
| 2373 | } |
| 2374 | |
| 2375 | /* a zero length entry indicates the end */ |
| 2376 | |
| 2377 | if ((user_len != 0) && (error == 0)) { |
| 2378 | |
| 2379 | len = 0; |
| 2380 | |
| 2381 | error = copyout(&len, |
| 2382 | USB_ADD_BYTES(user_ptr, delta), 1); |
| 2383 | } |
| 2384 | lockmgr(&usb_sym_lock, LK_RELEASE); |
| 2385 | return (error); |
| 2386 | } |
| 2387 | |
| 2388 | void |
| 2389 | usb_fifo_set_close_zlp(struct usb_fifo *f, uint8_t onoff) |
| 2390 | { |
| 2391 | if (f == NULL) |
| 2392 | return; |
| 2393 | |
| 2394 | /* send a Zero Length Packet, ZLP, before close */ |
| 2395 | f->flag_short = onoff; |
| 2396 | } |
| 2397 | |
| 2398 | void |
| 2399 | usb_fifo_set_write_defrag(struct usb_fifo *f, uint8_t onoff) |
| 2400 | { |
| 2401 | if (f == NULL) |
| 2402 | return; |
| 2403 | |
| 2404 | /* defrag written data */ |
| 2405 | f->flag_write_defrag = onoff; |
| 2406 | /* reset defrag state */ |
| 2407 | f->flag_have_fragment = 0; |
| 2408 | } |
| 2409 | |
| 2410 | void * |
| 2411 | usb_fifo_softc(struct usb_fifo *f) |
| 2412 | { |
| 2413 | return (f->priv_sc0); |
| 2414 | } |
| 2415 | #endif /* USB_HAVE_UGEN */ |