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 static const STRUCT_USB_HOST_ID udbp_devs[] = { 262 {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_TURBOCONNECT, 0)}, 263 {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_GADGETZERO, 0)}, 264 {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2301, 0)}, 265 {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2302, 0)}, 266 {USB_VPI(USB_VENDOR_ANCHOR, USB_PRODUCT_ANCHOR_EZLINK, 0)}, 267 {USB_VPI(USB_VENDOR_GENESYS, USB_PRODUCT_GENESYS_GL620USB, 0)}, 268 }; 269 270 DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0); 271 MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION); 272 MODULE_DEPEND(udbp, usb, 1, 1, 1); 273 MODULE_VERSION(udbp, 1); 274 USB_PNP_HOST_INFO(udbp_devs); 275 276 static int 277 udbp_modload(module_t mod, int event, void *data) 278 { 279 int error; 280 281 switch (event) { 282 case MOD_LOAD: 283 error = ng_newtype(&ng_udbp_typestruct); 284 if (error != 0) { 285 printf("%s: Could not register " 286 "Netgraph node type, error=%d\n", 287 NG_UDBP_NODE_TYPE, error); 288 } 289 break; 290 291 case MOD_UNLOAD: 292 error = ng_rmtype(&ng_udbp_typestruct); 293 break; 294 295 default: 296 error = EOPNOTSUPP; 297 break; 298 } 299 return (error); 300 } 301 302 static int 303 udbp_probe(device_t dev) 304 { 305 struct usb_attach_arg *uaa = device_get_ivars(dev); 306 307 if (uaa->usb_mode != USB_MODE_HOST) 308 return (ENXIO); 309 if (uaa->info.bConfigIndex != 0) 310 return (ENXIO); 311 if (uaa->info.bIfaceIndex != 0) 312 return (ENXIO); 313 314 return (usbd_lookup_id_by_uaa(udbp_devs, sizeof(udbp_devs), uaa)); 315 } 316 317 static int 318 udbp_attach(device_t dev) 319 { 320 struct usb_attach_arg *uaa = device_get_ivars(dev); 321 struct udbp_softc *sc = device_get_softc(dev); 322 int error; 323 324 device_set_usb_desc(dev); 325 326 snprintf(sc->sc_name, sizeof(sc->sc_name), 327 "%s", device_get_nameunit(dev)); 328 329 mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE); 330 331 error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex, 332 sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx); 333 if (error) { 334 DPRINTF("error=%s\n", usbd_errstr(error)); 335 goto detach; 336 } 337 NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN); 338 339 NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN); 340 341 /* create Netgraph node */ 342 343 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { 344 printf("%s: Could not create Netgraph node\n", 345 sc->sc_name); 346 sc->sc_node = NULL; 347 goto detach; 348 } 349 /* name node */ 350 351 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { 352 printf("%s: Could not name node\n", 353 sc->sc_name); 354 NG_NODE_UNREF(sc->sc_node); 355 sc->sc_node = NULL; 356 goto detach; 357 } 358 NG_NODE_SET_PRIVATE(sc->sc_node, sc); 359 360 /* the device is now operational */ 361 362 return (0); /* success */ 363 364 detach: 365 udbp_detach(dev); 366 return (ENOMEM); /* failure */ 367 } 368 369 static int 370 udbp_detach(device_t dev) 371 { 372 struct udbp_softc *sc = device_get_softc(dev); 373 374 /* destroy Netgraph node */ 375 376 if (sc->sc_node != NULL) { 377 NG_NODE_SET_PRIVATE(sc->sc_node, NULL); 378 ng_rmnode_self(sc->sc_node); 379 sc->sc_node = NULL; 380 } 381 /* free USB transfers, if any */ 382 383 usbd_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX); 384 385 mtx_destroy(&sc->sc_mtx); 386 387 /* destroy queues */ 388 389 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq); 390 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri); 391 392 /* extra check */ 393 394 if (sc->sc_bulk_in_buffer) { 395 m_freem(sc->sc_bulk_in_buffer); 396 sc->sc_bulk_in_buffer = NULL; 397 } 398 return (0); /* success */ 399 } 400 401 static void 402 udbp_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error) 403 { 404 struct udbp_softc *sc = usbd_xfer_softc(xfer); 405 struct usb_page_cache *pc; 406 struct mbuf *m; 407 int actlen; 408 409 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 410 411 switch (USB_GET_STATE(xfer)) { 412 case USB_ST_TRANSFERRED: 413 414 /* allocate new mbuf */ 415 416 MGETHDR(m, M_NOWAIT, MT_DATA); 417 418 if (m == NULL) { 419 goto tr_setup; 420 } 421 422 if (!(MCLGET(m, M_NOWAIT))) { 423 m_freem(m); 424 goto tr_setup; 425 } 426 m->m_pkthdr.len = m->m_len = actlen; 427 428 pc = usbd_xfer_get_frame(xfer, 0); 429 usbd_copy_out(pc, 0, m->m_data, actlen); 430 431 sc->sc_bulk_in_buffer = m; 432 433 DPRINTF("received package %d bytes\n", actlen); 434 435 case USB_ST_SETUP: 436 tr_setup: 437 if (sc->sc_bulk_in_buffer) { 438 ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0); 439 return; 440 } 441 if (sc->sc_flags & UDBP_FLAG_READ_STALL) { 442 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); 443 return; 444 } 445 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 446 usbd_transfer_submit(xfer); 447 return; 448 449 default: /* Error */ 450 if (error != USB_ERR_CANCELLED) { 451 /* try to clear stall first */ 452 sc->sc_flags |= UDBP_FLAG_READ_STALL; 453 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); 454 } 455 return; 456 457 } 458 } 459 460 static void 461 udbp_bulk_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error) 462 { 463 struct udbp_softc *sc = usbd_xfer_softc(xfer); 464 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD]; 465 466 if (usbd_clear_stall_callback(xfer, xfer_other)) { 467 DPRINTF("stall cleared\n"); 468 sc->sc_flags &= ~UDBP_FLAG_READ_STALL; 469 usbd_transfer_start(xfer_other); 470 } 471 } 472 473 static void 474 udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2) 475 { 476 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 477 struct mbuf *m; 478 int error; 479 480 if (sc == NULL) { 481 return; 482 } 483 mtx_lock(&sc->sc_mtx); 484 485 m = sc->sc_bulk_in_buffer; 486 487 if (m) { 488 489 sc->sc_bulk_in_buffer = NULL; 490 491 if ((sc->sc_hook == NULL) || 492 NG_HOOK_NOT_VALID(sc->sc_hook)) { 493 DPRINTF("No upstream hook\n"); 494 goto done; 495 } 496 sc->sc_packets_in++; 497 498 NG_SEND_DATA_ONLY(error, sc->sc_hook, m); 499 500 m = NULL; 501 } 502 done: 503 if (m) { 504 m_freem(m); 505 } 506 /* start USB bulk-in transfer, if not already started */ 507 508 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]); 509 510 mtx_unlock(&sc->sc_mtx); 511 } 512 513 static void 514 udbp_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error) 515 { 516 struct udbp_softc *sc = usbd_xfer_softc(xfer); 517 struct usb_page_cache *pc; 518 struct mbuf *m; 519 520 switch (USB_GET_STATE(xfer)) { 521 case USB_ST_TRANSFERRED: 522 523 sc->sc_packets_out++; 524 525 case USB_ST_SETUP: 526 if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) { 527 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); 528 return; 529 } 530 /* get next mbuf, if any */ 531 532 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m); 533 if (m == NULL) { 534 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m); 535 if (m == NULL) { 536 DPRINTF("Data queue is empty\n"); 537 return; 538 } 539 } 540 if (m->m_pkthdr.len > MCLBYTES) { 541 DPRINTF("truncating large packet " 542 "from %d to %d bytes\n", m->m_pkthdr.len, 543 MCLBYTES); 544 m->m_pkthdr.len = MCLBYTES; 545 } 546 pc = usbd_xfer_get_frame(xfer, 0); 547 usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len); 548 549 usbd_xfer_set_frame_len(xfer, 0, m->m_pkthdr.len); 550 551 DPRINTF("packet out: %d bytes\n", m->m_pkthdr.len); 552 553 m_freem(m); 554 555 usbd_transfer_submit(xfer); 556 return; 557 558 default: /* Error */ 559 if (error != USB_ERR_CANCELLED) { 560 /* try to clear stall first */ 561 sc->sc_flags |= UDBP_FLAG_WRITE_STALL; 562 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); 563 } 564 return; 565 566 } 567 } 568 569 static void 570 udbp_bulk_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error) 571 { 572 struct udbp_softc *sc = usbd_xfer_softc(xfer); 573 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR]; 574 575 if (usbd_clear_stall_callback(xfer, xfer_other)) { 576 DPRINTF("stall cleared\n"); 577 sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL; 578 usbd_transfer_start(xfer_other); 579 } 580 } 581 582 /*********************************************************************** 583 * Start of Netgraph methods 584 **********************************************************************/ 585 586 /* 587 * If this is a device node so this work is done in the attach() 588 * routine and the constructor will return EINVAL as you should not be able 589 * to create nodes that depend on hardware (unless you can add the hardware :) 590 */ 591 static int 592 ng_udbp_constructor(node_p node) 593 { 594 return (EINVAL); 595 } 596 597 /* 598 * Give our ok for a hook to be added... 599 * If we are not running this might kick a device into life. 600 * Possibly decode information out of the hook name. 601 * Add the hook's private info to the hook structure. 602 * (if we had some). In this example, we assume that there is a 603 * an array of structs, called 'channel' in the private info, 604 * one for each active channel. The private 605 * pointer of each hook points to the appropriate UDBP_hookinfo struct 606 * so that the source of an input packet is easily identified. 607 */ 608 static int 609 ng_udbp_newhook(node_p node, hook_p hook, const char *name) 610 { 611 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 612 int32_t error = 0; 613 614 if (strcmp(name, NG_UDBP_HOOK_NAME)) { 615 return (EINVAL); 616 } 617 mtx_lock(&sc->sc_mtx); 618 619 if (sc->sc_hook != NULL) { 620 error = EISCONN; 621 } else { 622 sc->sc_hook = hook; 623 NG_HOOK_SET_PRIVATE(hook, NULL); 624 } 625 626 mtx_unlock(&sc->sc_mtx); 627 628 return (error); 629 } 630 631 /* 632 * Get a netgraph control message. 633 * Check it is one we understand. If needed, send a response. 634 * We could save the address for an async action later, but don't here. 635 * Always free the message. 636 * The response should be in a malloc'd region that the caller can 'free'. 637 * A response is not required. 638 * Theoretically you could respond defferently to old message types if 639 * the cookie in the header didn't match what we consider to be current 640 * (so that old userland programs could continue to work). 641 */ 642 static int 643 ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook) 644 { 645 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 646 struct ng_mesg *resp = NULL; 647 int error = 0; 648 struct ng_mesg *msg; 649 650 NGI_GET_MSG(item, msg); 651 /* Deal with message according to cookie and command */ 652 switch (msg->header.typecookie) { 653 case NGM_UDBP_COOKIE: 654 switch (msg->header.cmd) { 655 case NGM_UDBP_GET_STATUS: 656 { 657 struct ngudbpstat *stats; 658 659 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT); 660 if (!resp) { 661 error = ENOMEM; 662 break; 663 } 664 stats = (struct ngudbpstat *)resp->data; 665 mtx_lock(&sc->sc_mtx); 666 stats->packets_in = sc->sc_packets_in; 667 stats->packets_out = sc->sc_packets_out; 668 mtx_unlock(&sc->sc_mtx); 669 break; 670 } 671 case NGM_UDBP_SET_FLAG: 672 if (msg->header.arglen != sizeof(uint32_t)) { 673 error = EINVAL; 674 break; 675 } 676 DPRINTF("flags = 0x%08x\n", 677 *((uint32_t *)msg->data)); 678 break; 679 default: 680 error = EINVAL; /* unknown command */ 681 break; 682 } 683 break; 684 default: 685 error = EINVAL; /* unknown cookie type */ 686 break; 687 } 688 689 /* Take care of synchronous response, if any */ 690 NG_RESPOND_MSG(error, node, item, resp); 691 NG_FREE_MSG(msg); 692 return (error); 693 } 694 695 /* 696 * Accept data from the hook and queue it for output. 697 */ 698 static int 699 ng_udbp_rcvdata(hook_p hook, item_p item) 700 { 701 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 702 struct ng_bt_mbufq *queue_ptr; 703 struct mbuf *m; 704 struct ng_tag_prio *ptag; 705 int error; 706 707 if (sc == NULL) { 708 NG_FREE_ITEM(item); 709 return (EHOSTDOWN); 710 } 711 NGI_GET_M(item, m); 712 NG_FREE_ITEM(item); 713 714 /* 715 * Now queue the data for when it can be sent 716 */ 717 ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE, 718 NG_TAG_PRIO, NULL); 719 720 if (ptag && (ptag->priority > NG_PRIO_CUTOFF)) 721 queue_ptr = &sc->sc_xmitq_hipri; 722 else 723 queue_ptr = &sc->sc_xmitq; 724 725 mtx_lock(&sc->sc_mtx); 726 727 if (NG_BT_MBUFQ_FULL(queue_ptr)) { 728 NG_BT_MBUFQ_DROP(queue_ptr); 729 NG_FREE_M(m); 730 error = ENOBUFS; 731 } else { 732 NG_BT_MBUFQ_ENQUEUE(queue_ptr, m); 733 /* 734 * start bulk-out transfer, if not already started: 735 */ 736 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]); 737 error = 0; 738 } 739 740 mtx_unlock(&sc->sc_mtx); 741 742 return (error); 743 } 744 745 /* 746 * Do local shutdown processing.. 747 * We are a persistent device, we refuse to go away, and 748 * only remove our links and reset ourself. 749 */ 750 static int 751 ng_udbp_rmnode(node_p node) 752 { 753 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 754 755 /* Let old node go */ 756 NG_NODE_SET_PRIVATE(node, NULL); 757 NG_NODE_UNREF(node); /* forget it ever existed */ 758 759 if (sc == NULL) { 760 goto done; 761 } 762 /* Create Netgraph node */ 763 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { 764 printf("%s: Could not create Netgraph node\n", 765 sc->sc_name); 766 sc->sc_node = NULL; 767 goto done; 768 } 769 /* Name node */ 770 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { 771 printf("%s: Could not name Netgraph node\n", 772 sc->sc_name); 773 NG_NODE_UNREF(sc->sc_node); 774 sc->sc_node = NULL; 775 goto done; 776 } 777 NG_NODE_SET_PRIVATE(sc->sc_node, sc); 778 779 done: 780 if (sc) { 781 mtx_unlock(&sc->sc_mtx); 782 } 783 return (0); 784 } 785 786 /* 787 * This is called once we've already connected a new hook to the other node. 788 * It gives us a chance to balk at the last minute. 789 */ 790 static int 791 ng_udbp_connect(hook_p hook) 792 { 793 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 794 795 /* probably not at splnet, force outward queueing */ 796 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); 797 798 mtx_lock(&sc->sc_mtx); 799 800 sc->sc_flags |= (UDBP_FLAG_READ_STALL | 801 UDBP_FLAG_WRITE_STALL); 802 803 /* start bulk-in transfer */ 804 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]); 805 806 /* start bulk-out transfer */ 807 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]); 808 809 mtx_unlock(&sc->sc_mtx); 810 811 return (0); 812 } 813 814 /* 815 * Dook disconnection 816 * 817 * For this type, removal of the last link destroys the node 818 */ 819 static int 820 ng_udbp_disconnect(hook_p hook) 821 { 822 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 823 int error = 0; 824 825 if (sc != NULL) { 826 827 mtx_lock(&sc->sc_mtx); 828 829 if (hook != sc->sc_hook) { 830 error = EINVAL; 831 } else { 832 833 /* stop bulk-in transfer */ 834 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]); 835 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD]); 836 837 /* stop bulk-out transfer */ 838 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]); 839 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR]); 840 841 /* cleanup queues */ 842 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq); 843 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri); 844 845 if (sc->sc_bulk_in_buffer) { 846 m_freem(sc->sc_bulk_in_buffer); 847 sc->sc_bulk_in_buffer = NULL; 848 } 849 sc->sc_hook = NULL; 850 } 851 852 mtx_unlock(&sc->sc_mtx); 853 } 854 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 855 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) 856 ng_rmnode_self(NG_HOOK_NODE(hook)); 857 858 return (error); 859 } 860