1 /*- 2 * Copyright (c) 1996-2000 Whistle Communications, Inc. 3 * 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 * 3. Neither the name of author nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY NICK HIBMA AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 * 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 /* Driver for arbitrary double bulk pipe devices. 35 * The driver assumes that there will be the same driver on the other side. 36 * 37 * XXX Some more information on what the framing of the IP packets looks like. 38 * 39 * To take full advantage of bulk transmission, packets should be chosen 40 * between 1k and 5k in size (1k to make sure the sending side starts 41 * streaming, and <5k to avoid overflowing the system with small TDs). 42 */ 43 44 45 /* probe/attach/detach: 46 * Connect the driver to the hardware and netgraph 47 * 48 * The reason we submit a bulk in transfer is that USB does not know about 49 * interrupts. The bulk transfer continuously polls the device for data. 50 * While the device has no data available, the device NAKs the TDs. As soon 51 * as there is data, the transfer happens and the data comes flowing in. 52 * 53 * In case you were wondering, interrupt transfers happen exactly that way. 54 * It therefore doesn't make sense to use the interrupt pipe to signal 55 * 'data ready' and then schedule a bulk transfer to fetch it. That would 56 * incur a 2ms delay at least, without reducing bandwidth requirements. 57 * 58 */ 59 60 #include <sys/stdint.h> 61 #include <sys/stddef.h> 62 #include <sys/param.h> 63 #include <sys/queue.h> 64 #include <sys/types.h> 65 #include <sys/systm.h> 66 #include <sys/kernel.h> 67 #include <sys/bus.h> 68 #include <sys/module.h> 69 #include <sys/lock.h> 70 #include <sys/mutex.h> 71 #include <sys/condvar.h> 72 #include <sys/sysctl.h> 73 #include <sys/sx.h> 74 #include <sys/unistd.h> 75 #include <sys/callout.h> 76 #include <sys/malloc.h> 77 #include <sys/priv.h> 78 79 #include <dev/usb/usb.h> 80 #include <dev/usb/usbdi.h> 81 #include <dev/usb/usbdi_util.h> 82 #include "usbdevs.h" 83 84 #define USB_DEBUG_VAR udbp_debug 85 #include <dev/usb/usb_debug.h> 86 87 #include <sys/mbuf.h> 88 89 #include <netgraph/ng_message.h> 90 #include <netgraph/netgraph.h> 91 #include <netgraph/ng_parse.h> 92 #include <netgraph/bluetooth/include/ng_bluetooth.h> 93 94 #include <dev/usb/misc/udbp.h> 95 96 #ifdef USB_DEBUG 97 static int udbp_debug = 0; 98 99 static SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp"); 100 SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RWTUN, 101 &udbp_debug, 0, "udbp debug level"); 102 #endif 103 104 #define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in 105 * msecs */ 106 #define UDBP_BUFFERSIZE MCLBYTES /* maximum number of bytes in one 107 * transfer */ 108 #define UDBP_T_WR 0 109 #define UDBP_T_RD 1 110 #define UDBP_T_WR_CS 2 111 #define UDBP_T_RD_CS 3 112 #define UDBP_T_MAX 4 113 #define UDBP_Q_MAXLEN 50 114 115 struct udbp_softc { 116 117 struct mtx sc_mtx; 118 struct ng_bt_mbufq sc_xmitq_hipri; /* hi-priority transmit queue */ 119 struct ng_bt_mbufq sc_xmitq; /* low-priority transmit queue */ 120 121 struct usb_xfer *sc_xfer[UDBP_T_MAX]; 122 node_p sc_node; /* back pointer to node */ 123 hook_p sc_hook; /* pointer to the hook */ 124 struct mbuf *sc_bulk_in_buffer; 125 126 uint32_t sc_packets_in; /* packets in from downstream */ 127 uint32_t sc_packets_out; /* packets out towards downstream */ 128 129 uint8_t sc_flags; 130 #define UDBP_FLAG_READ_STALL 0x01 /* read transfer stalled */ 131 #define UDBP_FLAG_WRITE_STALL 0x02 /* write transfer stalled */ 132 133 uint8_t sc_name[16]; 134 }; 135 136 /* prototypes */ 137 138 static int udbp_modload(module_t mod, int event, void *data); 139 140 static device_probe_t udbp_probe; 141 static device_attach_t udbp_attach; 142 static device_detach_t udbp_detach; 143 144 static usb_callback_t udbp_bulk_read_callback; 145 static usb_callback_t udbp_bulk_read_clear_stall_callback; 146 static usb_callback_t udbp_bulk_write_callback; 147 static usb_callback_t udbp_bulk_write_clear_stall_callback; 148 149 static void udbp_bulk_read_complete(node_p, hook_p, void *, int); 150 151 static ng_constructor_t ng_udbp_constructor; 152 static ng_rcvmsg_t ng_udbp_rcvmsg; 153 static ng_shutdown_t ng_udbp_rmnode; 154 static ng_newhook_t ng_udbp_newhook; 155 static ng_connect_t ng_udbp_connect; 156 static ng_rcvdata_t ng_udbp_rcvdata; 157 static ng_disconnect_t ng_udbp_disconnect; 158 159 /* Parse type for struct ngudbpstat */ 160 static const struct ng_parse_struct_field 161 ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO; 162 163 static const struct ng_parse_type ng_udbp_stat_type = { 164 &ng_parse_struct_type, 165 &ng_udbp_stat_type_fields 166 }; 167 168 /* List of commands and how to convert arguments to/from ASCII */ 169 static const struct ng_cmdlist ng_udbp_cmdlist[] = { 170 { 171 NGM_UDBP_COOKIE, 172 NGM_UDBP_GET_STATUS, 173 "getstatus", 174 NULL, 175 &ng_udbp_stat_type, 176 }, 177 { 178 NGM_UDBP_COOKIE, 179 NGM_UDBP_SET_FLAG, 180 "setflag", 181 &ng_parse_int32_type, 182 NULL 183 }, 184 {0} 185 }; 186 187 /* Netgraph node type descriptor */ 188 static struct ng_type ng_udbp_typestruct = { 189 .version = NG_ABI_VERSION, 190 .name = NG_UDBP_NODE_TYPE, 191 .constructor = ng_udbp_constructor, 192 .rcvmsg = ng_udbp_rcvmsg, 193 .shutdown = ng_udbp_rmnode, 194 .newhook = ng_udbp_newhook, 195 .connect = ng_udbp_connect, 196 .rcvdata = ng_udbp_rcvdata, 197 .disconnect = ng_udbp_disconnect, 198 .cmdlist = ng_udbp_cmdlist, 199 }; 200 201 /* USB config */ 202 static const struct usb_config udbp_config[UDBP_T_MAX] = { 203 204 [UDBP_T_WR] = { 205 .type = UE_BULK, 206 .endpoint = UE_ADDR_ANY, 207 .direction = UE_DIR_OUT, 208 .bufsize = UDBP_BUFFERSIZE, 209 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 210 .callback = &udbp_bulk_write_callback, 211 .timeout = UDBP_TIMEOUT, 212 }, 213 214 [UDBP_T_RD] = { 215 .type = UE_BULK, 216 .endpoint = UE_ADDR_ANY, 217 .direction = UE_DIR_IN, 218 .bufsize = UDBP_BUFFERSIZE, 219 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 220 .callback = &udbp_bulk_read_callback, 221 }, 222 223 [UDBP_T_WR_CS] = { 224 .type = UE_CONTROL, 225 .endpoint = 0x00, /* Control pipe */ 226 .direction = UE_DIR_ANY, 227 .bufsize = sizeof(struct usb_device_request), 228 .callback = &udbp_bulk_write_clear_stall_callback, 229 .timeout = 1000, /* 1 second */ 230 .interval = 50, /* 50ms */ 231 }, 232 233 [UDBP_T_RD_CS] = { 234 .type = UE_CONTROL, 235 .endpoint = 0x00, /* Control pipe */ 236 .direction = UE_DIR_ANY, 237 .bufsize = sizeof(struct usb_device_request), 238 .callback = &udbp_bulk_read_clear_stall_callback, 239 .timeout = 1000, /* 1 second */ 240 .interval = 50, /* 50ms */ 241 }, 242 }; 243 244 static devclass_t udbp_devclass; 245 246 static device_method_t udbp_methods[] = { 247 /* Device interface */ 248 DEVMETHOD(device_probe, udbp_probe), 249 DEVMETHOD(device_attach, udbp_attach), 250 DEVMETHOD(device_detach, udbp_detach), 251 252 DEVMETHOD_END 253 }; 254 255 static driver_t udbp_driver = { 256 .name = "udbp", 257 .methods = udbp_methods, 258 .size = sizeof(struct udbp_softc), 259 }; 260 261 DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0); 262 MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION); 263 MODULE_DEPEND(udbp, usb, 1, 1, 1); 264 MODULE_VERSION(udbp, 1); 265 266 static int 267 udbp_modload(module_t mod, int event, void *data) 268 { 269 int error; 270 271 switch (event) { 272 case MOD_LOAD: 273 error = ng_newtype(&ng_udbp_typestruct); 274 if (error != 0) { 275 printf("%s: Could not register " 276 "Netgraph node type, error=%d\n", 277 NG_UDBP_NODE_TYPE, error); 278 } 279 break; 280 281 case MOD_UNLOAD: 282 error = ng_rmtype(&ng_udbp_typestruct); 283 break; 284 285 default: 286 error = EOPNOTSUPP; 287 break; 288 } 289 return (error); 290 } 291 292 static const STRUCT_USB_HOST_ID udbp_devs[] = { 293 {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_TURBOCONNECT, 0)}, 294 {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_GADGETZERO, 0)}, 295 {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2301, 0)}, 296 {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2302, 0)}, 297 {USB_VPI(USB_VENDOR_ANCHOR, USB_PRODUCT_ANCHOR_EZLINK, 0)}, 298 {USB_VPI(USB_VENDOR_GENESYS, USB_PRODUCT_GENESYS_GL620USB, 0)}, 299 }; 300 301 static int 302 udbp_probe(device_t dev) 303 { 304 struct usb_attach_arg *uaa = device_get_ivars(dev); 305 306 if (uaa->usb_mode != USB_MODE_HOST) 307 return (ENXIO); 308 if (uaa->info.bConfigIndex != 0) 309 return (ENXIO); 310 if (uaa->info.bIfaceIndex != 0) 311 return (ENXIO); 312 313 return (usbd_lookup_id_by_uaa(udbp_devs, sizeof(udbp_devs), uaa)); 314 } 315 316 static int 317 udbp_attach(device_t dev) 318 { 319 struct usb_attach_arg *uaa = device_get_ivars(dev); 320 struct udbp_softc *sc = device_get_softc(dev); 321 int error; 322 323 device_set_usb_desc(dev); 324 325 snprintf(sc->sc_name, sizeof(sc->sc_name), 326 "%s", device_get_nameunit(dev)); 327 328 mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE); 329 330 error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex, 331 sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx); 332 if (error) { 333 DPRINTF("error=%s\n", usbd_errstr(error)); 334 goto detach; 335 } 336 NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN); 337 338 NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN); 339 340 /* create Netgraph node */ 341 342 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { 343 printf("%s: Could not create Netgraph node\n", 344 sc->sc_name); 345 sc->sc_node = NULL; 346 goto detach; 347 } 348 /* name node */ 349 350 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { 351 printf("%s: Could not name node\n", 352 sc->sc_name); 353 NG_NODE_UNREF(sc->sc_node); 354 sc->sc_node = NULL; 355 goto detach; 356 } 357 NG_NODE_SET_PRIVATE(sc->sc_node, sc); 358 359 /* the device is now operational */ 360 361 return (0); /* success */ 362 363 detach: 364 udbp_detach(dev); 365 return (ENOMEM); /* failure */ 366 } 367 368 static int 369 udbp_detach(device_t dev) 370 { 371 struct udbp_softc *sc = device_get_softc(dev); 372 373 /* destroy Netgraph node */ 374 375 if (sc->sc_node != NULL) { 376 NG_NODE_SET_PRIVATE(sc->sc_node, NULL); 377 ng_rmnode_self(sc->sc_node); 378 sc->sc_node = NULL; 379 } 380 /* free USB transfers, if any */ 381 382 usbd_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX); 383 384 mtx_destroy(&sc->sc_mtx); 385 386 /* destroy queues */ 387 388 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq); 389 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri); 390 391 /* extra check */ 392 393 if (sc->sc_bulk_in_buffer) { 394 m_freem(sc->sc_bulk_in_buffer); 395 sc->sc_bulk_in_buffer = NULL; 396 } 397 return (0); /* success */ 398 } 399 400 static void 401 udbp_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error) 402 { 403 struct udbp_softc *sc = usbd_xfer_softc(xfer); 404 struct usb_page_cache *pc; 405 struct mbuf *m; 406 int actlen; 407 408 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 409 410 switch (USB_GET_STATE(xfer)) { 411 case USB_ST_TRANSFERRED: 412 413 /* allocate new mbuf */ 414 415 MGETHDR(m, M_NOWAIT, MT_DATA); 416 417 if (m == NULL) { 418 goto tr_setup; 419 } 420 421 if (!(MCLGET(m, M_NOWAIT))) { 422 m_freem(m); 423 goto tr_setup; 424 } 425 m->m_pkthdr.len = m->m_len = actlen; 426 427 pc = usbd_xfer_get_frame(xfer, 0); 428 usbd_copy_out(pc, 0, m->m_data, actlen); 429 430 sc->sc_bulk_in_buffer = m; 431 432 DPRINTF("received package %d bytes\n", actlen); 433 434 case USB_ST_SETUP: 435 tr_setup: 436 if (sc->sc_bulk_in_buffer) { 437 ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0); 438 return; 439 } 440 if (sc->sc_flags & UDBP_FLAG_READ_STALL) { 441 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); 442 return; 443 } 444 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 445 usbd_transfer_submit(xfer); 446 return; 447 448 default: /* Error */ 449 if (error != USB_ERR_CANCELLED) { 450 /* try to clear stall first */ 451 sc->sc_flags |= UDBP_FLAG_READ_STALL; 452 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); 453 } 454 return; 455 456 } 457 } 458 459 static void 460 udbp_bulk_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error) 461 { 462 struct udbp_softc *sc = usbd_xfer_softc(xfer); 463 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD]; 464 465 if (usbd_clear_stall_callback(xfer, xfer_other)) { 466 DPRINTF("stall cleared\n"); 467 sc->sc_flags &= ~UDBP_FLAG_READ_STALL; 468 usbd_transfer_start(xfer_other); 469 } 470 } 471 472 static void 473 udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2) 474 { 475 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 476 struct mbuf *m; 477 int error; 478 479 if (sc == NULL) { 480 return; 481 } 482 mtx_lock(&sc->sc_mtx); 483 484 m = sc->sc_bulk_in_buffer; 485 486 if (m) { 487 488 sc->sc_bulk_in_buffer = NULL; 489 490 if ((sc->sc_hook == NULL) || 491 NG_HOOK_NOT_VALID(sc->sc_hook)) { 492 DPRINTF("No upstream hook\n"); 493 goto done; 494 } 495 sc->sc_packets_in++; 496 497 NG_SEND_DATA_ONLY(error, sc->sc_hook, m); 498 499 m = NULL; 500 } 501 done: 502 if (m) { 503 m_freem(m); 504 } 505 /* start USB bulk-in transfer, if not already started */ 506 507 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]); 508 509 mtx_unlock(&sc->sc_mtx); 510 } 511 512 static void 513 udbp_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error) 514 { 515 struct udbp_softc *sc = usbd_xfer_softc(xfer); 516 struct usb_page_cache *pc; 517 struct mbuf *m; 518 519 switch (USB_GET_STATE(xfer)) { 520 case USB_ST_TRANSFERRED: 521 522 sc->sc_packets_out++; 523 524 case USB_ST_SETUP: 525 if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) { 526 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); 527 return; 528 } 529 /* get next mbuf, if any */ 530 531 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m); 532 if (m == NULL) { 533 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m); 534 if (m == NULL) { 535 DPRINTF("Data queue is empty\n"); 536 return; 537 } 538 } 539 if (m->m_pkthdr.len > MCLBYTES) { 540 DPRINTF("truncating large packet " 541 "from %d to %d bytes\n", m->m_pkthdr.len, 542 MCLBYTES); 543 m->m_pkthdr.len = MCLBYTES; 544 } 545 pc = usbd_xfer_get_frame(xfer, 0); 546 usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len); 547 548 usbd_xfer_set_frame_len(xfer, 0, m->m_pkthdr.len); 549 550 DPRINTF("packet out: %d bytes\n", m->m_pkthdr.len); 551 552 m_freem(m); 553 554 usbd_transfer_submit(xfer); 555 return; 556 557 default: /* Error */ 558 if (error != USB_ERR_CANCELLED) { 559 /* try to clear stall first */ 560 sc->sc_flags |= UDBP_FLAG_WRITE_STALL; 561 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); 562 } 563 return; 564 565 } 566 } 567 568 static void 569 udbp_bulk_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error) 570 { 571 struct udbp_softc *sc = usbd_xfer_softc(xfer); 572 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR]; 573 574 if (usbd_clear_stall_callback(xfer, xfer_other)) { 575 DPRINTF("stall cleared\n"); 576 sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL; 577 usbd_transfer_start(xfer_other); 578 } 579 } 580 581 /*********************************************************************** 582 * Start of Netgraph methods 583 **********************************************************************/ 584 585 /* 586 * If this is a device node so this work is done in the attach() 587 * routine and the constructor will return EINVAL as you should not be able 588 * to create nodes that depend on hardware (unless you can add the hardware :) 589 */ 590 static int 591 ng_udbp_constructor(node_p node) 592 { 593 return (EINVAL); 594 } 595 596 /* 597 * Give our ok for a hook to be added... 598 * If we are not running this might kick a device into life. 599 * Possibly decode information out of the hook name. 600 * Add the hook's private info to the hook structure. 601 * (if we had some). In this example, we assume that there is a 602 * an array of structs, called 'channel' in the private info, 603 * one for each active channel. The private 604 * pointer of each hook points to the appropriate UDBP_hookinfo struct 605 * so that the source of an input packet is easily identified. 606 */ 607 static int 608 ng_udbp_newhook(node_p node, hook_p hook, const char *name) 609 { 610 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 611 int32_t error = 0; 612 613 if (strcmp(name, NG_UDBP_HOOK_NAME)) { 614 return (EINVAL); 615 } 616 mtx_lock(&sc->sc_mtx); 617 618 if (sc->sc_hook != NULL) { 619 error = EISCONN; 620 } else { 621 sc->sc_hook = hook; 622 NG_HOOK_SET_PRIVATE(hook, NULL); 623 } 624 625 mtx_unlock(&sc->sc_mtx); 626 627 return (error); 628 } 629 630 /* 631 * Get a netgraph control message. 632 * Check it is one we understand. If needed, send a response. 633 * We could save the address for an async action later, but don't here. 634 * Always free the message. 635 * The response should be in a malloc'd region that the caller can 'free'. 636 * A response is not required. 637 * Theoretically you could respond defferently to old message types if 638 * the cookie in the header didn't match what we consider to be current 639 * (so that old userland programs could continue to work). 640 */ 641 static int 642 ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook) 643 { 644 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 645 struct ng_mesg *resp = NULL; 646 int error = 0; 647 struct ng_mesg *msg; 648 649 NGI_GET_MSG(item, msg); 650 /* Deal with message according to cookie and command */ 651 switch (msg->header.typecookie) { 652 case NGM_UDBP_COOKIE: 653 switch (msg->header.cmd) { 654 case NGM_UDBP_GET_STATUS: 655 { 656 struct ngudbpstat *stats; 657 658 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT); 659 if (!resp) { 660 error = ENOMEM; 661 break; 662 } 663 stats = (struct ngudbpstat *)resp->data; 664 mtx_lock(&sc->sc_mtx); 665 stats->packets_in = sc->sc_packets_in; 666 stats->packets_out = sc->sc_packets_out; 667 mtx_unlock(&sc->sc_mtx); 668 break; 669 } 670 case NGM_UDBP_SET_FLAG: 671 if (msg->header.arglen != sizeof(uint32_t)) { 672 error = EINVAL; 673 break; 674 } 675 DPRINTF("flags = 0x%08x\n", 676 *((uint32_t *)msg->data)); 677 break; 678 default: 679 error = EINVAL; /* unknown command */ 680 break; 681 } 682 break; 683 default: 684 error = EINVAL; /* unknown cookie type */ 685 break; 686 } 687 688 /* Take care of synchronous response, if any */ 689 NG_RESPOND_MSG(error, node, item, resp); 690 NG_FREE_MSG(msg); 691 return (error); 692 } 693 694 /* 695 * Accept data from the hook and queue it for output. 696 */ 697 static int 698 ng_udbp_rcvdata(hook_p hook, item_p item) 699 { 700 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 701 struct ng_bt_mbufq *queue_ptr; 702 struct mbuf *m; 703 struct ng_tag_prio *ptag; 704 int error; 705 706 if (sc == NULL) { 707 NG_FREE_ITEM(item); 708 return (EHOSTDOWN); 709 } 710 NGI_GET_M(item, m); 711 NG_FREE_ITEM(item); 712 713 /* 714 * Now queue the data for when it can be sent 715 */ 716 ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE, 717 NG_TAG_PRIO, NULL); 718 719 if (ptag && (ptag->priority > NG_PRIO_CUTOFF)) 720 queue_ptr = &sc->sc_xmitq_hipri; 721 else 722 queue_ptr = &sc->sc_xmitq; 723 724 mtx_lock(&sc->sc_mtx); 725 726 if (NG_BT_MBUFQ_FULL(queue_ptr)) { 727 NG_BT_MBUFQ_DROP(queue_ptr); 728 NG_FREE_M(m); 729 error = ENOBUFS; 730 } else { 731 NG_BT_MBUFQ_ENQUEUE(queue_ptr, m); 732 /* 733 * start bulk-out transfer, if not already started: 734 */ 735 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]); 736 error = 0; 737 } 738 739 mtx_unlock(&sc->sc_mtx); 740 741 return (error); 742 } 743 744 /* 745 * Do local shutdown processing.. 746 * We are a persistant device, we refuse to go away, and 747 * only remove our links and reset ourself. 748 */ 749 static int 750 ng_udbp_rmnode(node_p node) 751 { 752 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 753 754 /* Let old node go */ 755 NG_NODE_SET_PRIVATE(node, NULL); 756 NG_NODE_UNREF(node); /* forget it ever existed */ 757 758 if (sc == NULL) { 759 goto done; 760 } 761 /* Create Netgraph node */ 762 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { 763 printf("%s: Could not create Netgraph node\n", 764 sc->sc_name); 765 sc->sc_node = NULL; 766 goto done; 767 } 768 /* Name node */ 769 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { 770 printf("%s: Could not name Netgraph node\n", 771 sc->sc_name); 772 NG_NODE_UNREF(sc->sc_node); 773 sc->sc_node = NULL; 774 goto done; 775 } 776 NG_NODE_SET_PRIVATE(sc->sc_node, sc); 777 778 done: 779 if (sc) { 780 mtx_unlock(&sc->sc_mtx); 781 } 782 return (0); 783 } 784 785 /* 786 * This is called once we've already connected a new hook to the other node. 787 * It gives us a chance to balk at the last minute. 788 */ 789 static int 790 ng_udbp_connect(hook_p hook) 791 { 792 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 793 794 /* probably not at splnet, force outward queueing */ 795 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); 796 797 mtx_lock(&sc->sc_mtx); 798 799 sc->sc_flags |= (UDBP_FLAG_READ_STALL | 800 UDBP_FLAG_WRITE_STALL); 801 802 /* start bulk-in transfer */ 803 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]); 804 805 /* start bulk-out transfer */ 806 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]); 807 808 mtx_unlock(&sc->sc_mtx); 809 810 return (0); 811 } 812 813 /* 814 * Dook disconnection 815 * 816 * For this type, removal of the last link destroys the node 817 */ 818 static int 819 ng_udbp_disconnect(hook_p hook) 820 { 821 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 822 int error = 0; 823 824 if (sc != NULL) { 825 826 mtx_lock(&sc->sc_mtx); 827 828 if (hook != sc->sc_hook) { 829 error = EINVAL; 830 } else { 831 832 /* stop bulk-in transfer */ 833 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]); 834 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD]); 835 836 /* stop bulk-out transfer */ 837 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]); 838 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR]); 839 840 /* cleanup queues */ 841 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq); 842 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri); 843 844 if (sc->sc_bulk_in_buffer) { 845 m_freem(sc->sc_bulk_in_buffer); 846 sc->sc_bulk_in_buffer = NULL; 847 } 848 sc->sc_hook = NULL; 849 } 850 851 mtx_unlock(&sc->sc_mtx); 852 } 853 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 854 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) 855 ng_rmnode_self(NG_HOOK_NODE(hook)); 856 857 return (error); 858 } 859