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 97static int udbp_debug = 0; 98 99static SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp"); 100SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RW, 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 115struct 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 138static int udbp_modload(module_t mod, int event, void *data); 139 140static device_probe_t udbp_probe; 141static device_attach_t udbp_attach; 142static device_detach_t udbp_detach; 143 144static usb_callback_t udbp_bulk_read_callback; 145static usb_callback_t udbp_bulk_read_clear_stall_callback; 146static usb_callback_t udbp_bulk_write_callback; 147static usb_callback_t udbp_bulk_write_clear_stall_callback; 148 149static void udbp_bulk_read_complete(node_p, hook_p, void *, int); 150 151static ng_constructor_t ng_udbp_constructor; 152static ng_rcvmsg_t ng_udbp_rcvmsg; 153static ng_shutdown_t ng_udbp_rmnode; 154static ng_newhook_t ng_udbp_newhook; 155static ng_connect_t ng_udbp_connect; 156static ng_rcvdata_t ng_udbp_rcvdata; 157static ng_disconnect_t ng_udbp_disconnect; 158 159/* Parse type for struct ngudbpstat */ 160static const struct ng_parse_struct_field 161 ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO; 162 163static 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 */ 169static 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 */ 188static 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 */ 202static 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 244static devclass_t udbp_devclass; 245 246static 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 255static driver_t udbp_driver = { 256 .name = "udbp", 257 .methods = udbp_methods, 258 .size = sizeof(struct udbp_softc), 259}; 260 261DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0); 262MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION); 263MODULE_DEPEND(udbp, usb, 1, 1, 1); 264MODULE_VERSION(udbp, 1); 265 266static int 267udbp_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 292static 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 301static int 302udbp_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 316static int 317udbp_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 363detach: 364 udbp_detach(dev); 365 return (ENOMEM); /* failure */ 366} 367 368static int 369udbp_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 400static void 401udbp_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 MCLGET(m, M_NOWAIT); 421 422 if (!(m->m_flags & M_EXT)) { 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: 436tr_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 460static void 461udbp_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 473static void 474udbp_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 } 502done: 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 513static void 514udbp_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 569static void 570udbp_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 */ 591static int 592ng_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 */ 608static int 609ng_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 */ 642static int 643ng_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 */ 698static int 699ng_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 persistant device, we refuse to go away, and 748 * only remove our links and reset ourself. 749 */ 750static int 751ng_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 779done: 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 */ 790static int 791ng_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 */ 819static int 820ng_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