udbp.c revision 190749
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: head/sys/dev/usb/misc/udbp.c 190749 2009-04-05 21:24:15Z piso $"); 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 "usbdevs.h" 61#include <dev/usb/usb.h> 62#include <dev/usb/usb_mfunc.h> 63#include <dev/usb/usb_error.h> 64 65#define USB_DEBUG_VAR udbp_debug 66 67#include <dev/usb/usb_core.h> 68#include <dev/usb/usb_debug.h> 69#include <dev/usb/usb_parse.h> 70#include <dev/usb/usb_lookup.h> 71#include <dev/usb/usb_util.h> 72#include <dev/usb/usb_busdma.h> 73 74#include <sys/mbuf.h> 75 76#include <netgraph/ng_message.h> 77#include <netgraph/netgraph.h> 78#include <netgraph/ng_parse.h> 79#include <netgraph/bluetooth/include/ng_bluetooth.h> 80 81#include <dev/usb/misc/udbp.h> 82 83#if USB_DEBUG 84static int udbp_debug = 0; 85 86SYSCTL_NODE(_hw_usb2, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp"); 87SYSCTL_INT(_hw_usb2_udbp, OID_AUTO, debug, CTLFLAG_RW, 88 &udbp_debug, 0, "udbp debug level"); 89#endif 90 91#define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in 92 * msecs */ 93#define UDBP_BUFFERSIZE MCLBYTES /* maximum number of bytes in one 94 * transfer */ 95#define UDBP_T_WR 0 96#define UDBP_T_RD 1 97#define UDBP_T_WR_CS 2 98#define UDBP_T_RD_CS 3 99#define UDBP_T_MAX 4 100#define UDBP_Q_MAXLEN 50 101 102struct udbp_softc { 103 104 struct mtx sc_mtx; 105 struct ng_bt_mbufq sc_xmitq_hipri; /* hi-priority transmit queue */ 106 struct ng_bt_mbufq sc_xmitq; /* low-priority transmit queue */ 107 108 struct usb2_xfer *sc_xfer[UDBP_T_MAX]; 109 node_p sc_node; /* back pointer to node */ 110 hook_p sc_hook; /* pointer to the hook */ 111 struct mbuf *sc_bulk_in_buffer; 112 113 uint32_t sc_packets_in; /* packets in from downstream */ 114 uint32_t sc_packets_out; /* packets out towards downstream */ 115 116 uint8_t sc_flags; 117#define UDBP_FLAG_READ_STALL 0x01 /* read transfer stalled */ 118#define UDBP_FLAG_WRITE_STALL 0x02 /* write transfer stalled */ 119 120 uint8_t sc_name[16]; 121}; 122 123/* prototypes */ 124 125static int udbp_modload(module_t mod, int event, void *data); 126 127static device_probe_t udbp_probe; 128static device_attach_t udbp_attach; 129static device_detach_t udbp_detach; 130 131static usb2_callback_t udbp_bulk_read_callback; 132static usb2_callback_t udbp_bulk_read_clear_stall_callback; 133static usb2_callback_t udbp_bulk_write_callback; 134static usb2_callback_t udbp_bulk_write_clear_stall_callback; 135 136static void udbp_bulk_read_complete(node_p, hook_p, void *, int); 137 138static ng_constructor_t ng_udbp_constructor; 139static ng_rcvmsg_t ng_udbp_rcvmsg; 140static ng_shutdown_t ng_udbp_rmnode; 141static ng_newhook_t ng_udbp_newhook; 142static ng_connect_t ng_udbp_connect; 143static ng_rcvdata_t ng_udbp_rcvdata; 144static ng_disconnect_t ng_udbp_disconnect; 145 146/* Parse type for struct ngudbpstat */ 147static const struct ng_parse_struct_field 148 ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO; 149 150static const struct ng_parse_type ng_udbp_stat_type = { 151 &ng_parse_struct_type, 152 &ng_udbp_stat_type_fields 153}; 154 155/* List of commands and how to convert arguments to/from ASCII */ 156static const struct ng_cmdlist ng_udbp_cmdlist[] = { 157 { 158 NGM_UDBP_COOKIE, 159 NGM_UDBP_GET_STATUS, 160 "getstatus", 161 NULL, 162 &ng_udbp_stat_type, 163 }, 164 { 165 NGM_UDBP_COOKIE, 166 NGM_UDBP_SET_FLAG, 167 "setflag", 168 &ng_parse_int32_type, 169 NULL 170 }, 171 {0} 172}; 173 174/* Netgraph node type descriptor */ 175static struct ng_type ng_udbp_typestruct = { 176 .version = NG_ABI_VERSION, 177 .name = NG_UDBP_NODE_TYPE, 178 .constructor = ng_udbp_constructor, 179 .rcvmsg = ng_udbp_rcvmsg, 180 .shutdown = ng_udbp_rmnode, 181 .newhook = ng_udbp_newhook, 182 .connect = ng_udbp_connect, 183 .rcvdata = ng_udbp_rcvdata, 184 .disconnect = ng_udbp_disconnect, 185 .cmdlist = ng_udbp_cmdlist, 186}; 187 188/* USB config */ 189static const struct usb2_config udbp_config[UDBP_T_MAX] = { 190 191 [UDBP_T_WR] = { 192 .type = UE_BULK, 193 .endpoint = UE_ADDR_ANY, 194 .direction = UE_DIR_OUT, 195 .bufsize = UDBP_BUFFERSIZE, 196 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 197 .callback = &udbp_bulk_write_callback, 198 .timeout = UDBP_TIMEOUT, 199 }, 200 201 [UDBP_T_RD] = { 202 .type = UE_BULK, 203 .endpoint = UE_ADDR_ANY, 204 .direction = UE_DIR_IN, 205 .bufsize = UDBP_BUFFERSIZE, 206 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 207 .callback = &udbp_bulk_read_callback, 208 }, 209 210 [UDBP_T_WR_CS] = { 211 .type = UE_CONTROL, 212 .endpoint = 0x00, /* Control pipe */ 213 .direction = UE_DIR_ANY, 214 .bufsize = sizeof(struct usb2_device_request), 215 .callback = &udbp_bulk_write_clear_stall_callback, 216 .timeout = 1000, /* 1 second */ 217 .interval = 50, /* 50ms */ 218 }, 219 220 [UDBP_T_RD_CS] = { 221 .type = UE_CONTROL, 222 .endpoint = 0x00, /* Control pipe */ 223 .direction = UE_DIR_ANY, 224 .bufsize = sizeof(struct usb2_device_request), 225 .callback = &udbp_bulk_read_clear_stall_callback, 226 .timeout = 1000, /* 1 second */ 227 .interval = 50, /* 50ms */ 228 }, 229}; 230 231static devclass_t udbp_devclass; 232 233static device_method_t udbp_methods[] = { 234 /* Device interface */ 235 DEVMETHOD(device_probe, udbp_probe), 236 DEVMETHOD(device_attach, udbp_attach), 237 DEVMETHOD(device_detach, udbp_detach), 238 {0, 0} 239}; 240 241static driver_t udbp_driver = { 242 .name = "udbp", 243 .methods = udbp_methods, 244 .size = sizeof(struct udbp_softc), 245}; 246 247DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0); 248MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION); 249MODULE_DEPEND(udbp, usb, 1, 1, 1); 250 251static int 252udbp_modload(module_t mod, int event, void *data) 253{ 254 int error; 255 256 switch (event) { 257 case MOD_LOAD: 258 error = ng_newtype(&ng_udbp_typestruct); 259 if (error != 0) { 260 printf("%s: Could not register " 261 "Netgraph node type, error=%d\n", 262 NG_UDBP_NODE_TYPE, error); 263 } 264 break; 265 266 case MOD_UNLOAD: 267 error = ng_rmtype(&ng_udbp_typestruct); 268 break; 269 270 default: 271 error = EOPNOTSUPP; 272 break; 273 } 274 return (error); 275} 276 277static int 278udbp_probe(device_t dev) 279{ 280 struct usb2_attach_arg *uaa = device_get_ivars(dev); 281 282 if (uaa->usb2_mode != USB_MODE_HOST) { 283 return (ENXIO); 284 } 285 /* 286 * XXX Julian, add the id of the device if you have one to test 287 * things with. run 'usbdevs -v' and note the 3 ID's that appear. 288 * The Vendor Id and Product Id are in hex and the Revision Id is in 289 * bcd. But as usual if the revision is 0x101 then you should 290 * compare the revision id in the device descriptor with 0x101 Or go 291 * search the file usbdevs.h. Maybe the device is already in there. 292 */ 293 if (((uaa->info.idVendor == USB_VENDOR_NETCHIP) && 294 (uaa->info.idProduct == USB_PRODUCT_NETCHIP_TURBOCONNECT))) 295 return (0); 296 297 if (((uaa->info.idVendor == USB_VENDOR_PROLIFIC) && 298 ((uaa->info.idProduct == USB_PRODUCT_PROLIFIC_PL2301) || 299 (uaa->info.idProduct == USB_PRODUCT_PROLIFIC_PL2302)))) 300 return (0); 301 302 if ((uaa->info.idVendor == USB_VENDOR_ANCHOR) && 303 (uaa->info.idProduct == USB_PRODUCT_ANCHOR_EZLINK)) 304 return (0); 305 306 if ((uaa->info.idVendor == USB_VENDOR_GENESYS) && 307 (uaa->info.idProduct == USB_PRODUCT_GENESYS_GL620USB)) 308 return (0); 309 310 return (ENXIO); 311} 312 313static int 314udbp_attach(device_t dev) 315{ 316 struct usb2_attach_arg *uaa = device_get_ivars(dev); 317 struct udbp_softc *sc = device_get_softc(dev); 318 int error; 319 320 device_set_usb2_desc(dev); 321 322 snprintf(sc->sc_name, sizeof(sc->sc_name), 323 "%s", device_get_nameunit(dev)); 324 325 mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE); 326 327 error = usb2_transfer_setup(uaa->device, &uaa->info.bIfaceIndex, 328 sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx); 329 if (error) { 330 DPRINTF("error=%s\n", usb2_errstr(error)); 331 goto detach; 332 } 333 NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN); 334 335 NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN); 336 337 /* create Netgraph node */ 338 339 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { 340 printf("%s: Could not create Netgraph node\n", 341 sc->sc_name); 342 sc->sc_node = NULL; 343 goto detach; 344 } 345 /* name node */ 346 347 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { 348 printf("%s: Could not name node\n", 349 sc->sc_name); 350 NG_NODE_UNREF(sc->sc_node); 351 sc->sc_node = NULL; 352 goto detach; 353 } 354 NG_NODE_SET_PRIVATE(sc->sc_node, sc); 355 356 /* the device is now operational */ 357 358 return (0); /* success */ 359 360detach: 361 udbp_detach(dev); 362 return (ENOMEM); /* failure */ 363} 364 365static int 366udbp_detach(device_t dev) 367{ 368 struct udbp_softc *sc = device_get_softc(dev); 369 370 /* destroy Netgraph node */ 371 372 if (sc->sc_node != NULL) { 373 NG_NODE_SET_PRIVATE(sc->sc_node, NULL); 374 ng_rmnode_self(sc->sc_node); 375 sc->sc_node = NULL; 376 } 377 /* free USB transfers, if any */ 378 379 usb2_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX); 380 381 mtx_destroy(&sc->sc_mtx); 382 383 /* destroy queues */ 384 385 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq); 386 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri); 387 388 /* extra check */ 389 390 if (sc->sc_bulk_in_buffer) { 391 m_freem(sc->sc_bulk_in_buffer); 392 sc->sc_bulk_in_buffer = NULL; 393 } 394 return (0); /* success */ 395} 396 397static void 398udbp_bulk_read_callback(struct usb2_xfer *xfer) 399{ 400 struct udbp_softc *sc = xfer->priv_sc; 401 struct mbuf *m; 402 403 switch (USB_GET_STATE(xfer)) { 404 case USB_ST_TRANSFERRED: 405 406 /* allocate new mbuf */ 407 408 MGETHDR(m, M_DONTWAIT, MT_DATA); 409 410 if (m == NULL) { 411 goto tr_setup; 412 } 413 MCLGET(m, M_DONTWAIT); 414 415 if (!(m->m_flags & M_EXT)) { 416 m_freem(m); 417 goto tr_setup; 418 } 419 m->m_pkthdr.len = m->m_len = xfer->actlen; 420 421 usb2_copy_out(xfer->frbuffers, 0, m->m_data, xfer->actlen); 422 423 sc->sc_bulk_in_buffer = m; 424 425 DPRINTF("received package %d " 426 "bytes\n", xfer->actlen); 427 428 case USB_ST_SETUP: 429tr_setup: 430 if (sc->sc_bulk_in_buffer) { 431 ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0); 432 return; 433 } 434 if (sc->sc_flags & UDBP_FLAG_READ_STALL) { 435 usb2_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); 436 return; 437 } 438 xfer->frlengths[0] = xfer->max_data_length; 439 usb2_start_hardware(xfer); 440 return; 441 442 default: /* Error */ 443 if (xfer->error != USB_ERR_CANCELLED) { 444 /* try to clear stall first */ 445 sc->sc_flags |= UDBP_FLAG_READ_STALL; 446 usb2_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); 447 } 448 return; 449 450 } 451} 452 453static void 454udbp_bulk_read_clear_stall_callback(struct usb2_xfer *xfer) 455{ 456 struct udbp_softc *sc = xfer->priv_sc; 457 struct usb2_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD]; 458 459 if (usb2_clear_stall_callback(xfer, xfer_other)) { 460 DPRINTF("stall cleared\n"); 461 sc->sc_flags &= ~UDBP_FLAG_READ_STALL; 462 usb2_transfer_start(xfer_other); 463 } 464} 465 466static void 467udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2) 468{ 469 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 470 struct mbuf *m; 471 int error; 472 473 if (sc == NULL) { 474 return; 475 } 476 mtx_lock(&sc->sc_mtx); 477 478 m = sc->sc_bulk_in_buffer; 479 480 if (m) { 481 482 sc->sc_bulk_in_buffer = NULL; 483 484 if ((sc->sc_hook == NULL) || 485 NG_HOOK_NOT_VALID(sc->sc_hook)) { 486 DPRINTF("No upstream hook\n"); 487 goto done; 488 } 489 sc->sc_packets_in++; 490 491 NG_SEND_DATA_ONLY(error, sc->sc_hook, m); 492 493 m = NULL; 494 } 495done: 496 if (m) { 497 m_freem(m); 498 } 499 /* start USB bulk-in transfer, if not already started */ 500 501 usb2_transfer_start(sc->sc_xfer[UDBP_T_RD]); 502 503 mtx_unlock(&sc->sc_mtx); 504} 505 506static void 507udbp_bulk_write_callback(struct usb2_xfer *xfer) 508{ 509 struct udbp_softc *sc = xfer->priv_sc; 510 struct mbuf *m; 511 512 switch (USB_GET_STATE(xfer)) { 513 case USB_ST_TRANSFERRED: 514 515 sc->sc_packets_out++; 516 517 case USB_ST_SETUP: 518 if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) { 519 usb2_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); 520 return; 521 } 522 /* get next mbuf, if any */ 523 524 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m); 525 if (m == NULL) { 526 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m); 527 if (m == NULL) { 528 DPRINTF("Data queue is empty\n"); 529 return; 530 } 531 } 532 if (m->m_pkthdr.len > MCLBYTES) { 533 DPRINTF("truncating large packet " 534 "from %d to %d bytes\n", m->m_pkthdr.len, 535 MCLBYTES); 536 m->m_pkthdr.len = MCLBYTES; 537 } 538 usb2_m_copy_in(xfer->frbuffers, 0, m, 0, m->m_pkthdr.len); 539 540 xfer->frlengths[0] = m->m_pkthdr.len; 541 542 m_freem(m); 543 544 DPRINTF("packet out: %d bytes\n", 545 xfer->frlengths[0]); 546 547 usb2_start_hardware(xfer); 548 return; 549 550 default: /* Error */ 551 if (xfer->error != USB_ERR_CANCELLED) { 552 /* try to clear stall first */ 553 sc->sc_flags |= UDBP_FLAG_WRITE_STALL; 554 usb2_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); 555 } 556 return; 557 558 } 559} 560 561static void 562udbp_bulk_write_clear_stall_callback(struct usb2_xfer *xfer) 563{ 564 struct udbp_softc *sc = xfer->priv_sc; 565 struct usb2_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR]; 566 567 if (usb2_clear_stall_callback(xfer, xfer_other)) { 568 DPRINTF("stall cleared\n"); 569 sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL; 570 usb2_transfer_start(xfer_other); 571 } 572} 573 574/*********************************************************************** 575 * Start of Netgraph methods 576 **********************************************************************/ 577 578/* 579 * If this is a device node so this work is done in the attach() 580 * routine and the constructor will return EINVAL as you should not be able 581 * to create nodes that depend on hardware (unless you can add the hardware :) 582 */ 583static int 584ng_udbp_constructor(node_p node) 585{ 586 return (EINVAL); 587} 588 589/* 590 * Give our ok for a hook to be added... 591 * If we are not running this might kick a device into life. 592 * Possibly decode information out of the hook name. 593 * Add the hook's private info to the hook structure. 594 * (if we had some). In this example, we assume that there is a 595 * an array of structs, called 'channel' in the private info, 596 * one for each active channel. The private 597 * pointer of each hook points to the appropriate UDBP_hookinfo struct 598 * so that the source of an input packet is easily identified. 599 */ 600static int 601ng_udbp_newhook(node_p node, hook_p hook, const char *name) 602{ 603 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 604 int32_t error = 0; 605 606 if (strcmp(name, NG_UDBP_HOOK_NAME)) { 607 return (EINVAL); 608 } 609 mtx_lock(&sc->sc_mtx); 610 611 if (sc->sc_hook != NULL) { 612 error = EISCONN; 613 } else { 614 sc->sc_hook = hook; 615 NG_HOOK_SET_PRIVATE(hook, NULL); 616 } 617 618 mtx_unlock(&sc->sc_mtx); 619 620 return (error); 621} 622 623/* 624 * Get a netgraph control message. 625 * Check it is one we understand. If needed, send a response. 626 * We could save the address for an async action later, but don't here. 627 * Always free the message. 628 * The response should be in a malloc'd region that the caller can 'free'. 629 * A response is not required. 630 * Theoretically you could respond defferently to old message types if 631 * the cookie in the header didn't match what we consider to be current 632 * (so that old userland programs could continue to work). 633 */ 634static int 635ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook) 636{ 637 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 638 struct ng_mesg *resp = NULL; 639 int error = 0; 640 struct ng_mesg *msg; 641 642 NGI_GET_MSG(item, msg); 643 /* Deal with message according to cookie and command */ 644 switch (msg->header.typecookie) { 645 case NGM_UDBP_COOKIE: 646 switch (msg->header.cmd) { 647 case NGM_UDBP_GET_STATUS: 648 { 649 struct ngudbpstat *stats; 650 651 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT); 652 if (!resp) { 653 error = ENOMEM; 654 break; 655 } 656 stats = (struct ngudbpstat *)resp->data; 657 mtx_lock(&sc->sc_mtx); 658 stats->packets_in = sc->sc_packets_in; 659 stats->packets_out = sc->sc_packets_out; 660 mtx_unlock(&sc->sc_mtx); 661 break; 662 } 663 case NGM_UDBP_SET_FLAG: 664 if (msg->header.arglen != sizeof(uint32_t)) { 665 error = EINVAL; 666 break; 667 } 668 DPRINTF("flags = 0x%08x\n", 669 *((uint32_t *)msg->data)); 670 break; 671 default: 672 error = EINVAL; /* unknown command */ 673 break; 674 } 675 break; 676 default: 677 error = EINVAL; /* unknown cookie type */ 678 break; 679 } 680 681 /* Take care of synchronous response, if any */ 682 NG_RESPOND_MSG(error, node, item, resp); 683 NG_FREE_MSG(msg); 684 return (error); 685} 686 687/* 688 * Accept data from the hook and queue it for output. 689 */ 690static int 691ng_udbp_rcvdata(hook_p hook, item_p item) 692{ 693 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 694 struct ng_bt_mbufq *queue_ptr; 695 struct mbuf *m; 696 struct ng_tag_prio *ptag; 697 int error; 698 699 if (sc == NULL) { 700 NG_FREE_ITEM(item); 701 return (EHOSTDOWN); 702 } 703 NGI_GET_M(item, m); 704 NG_FREE_ITEM(item); 705 706 /* 707 * Now queue the data for when it can be sent 708 */ 709 ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE, 710 NG_TAG_PRIO, NULL); 711 712 if (ptag && (ptag->priority > NG_PRIO_CUTOFF)) 713 queue_ptr = &sc->sc_xmitq_hipri; 714 else 715 queue_ptr = &sc->sc_xmitq; 716 717 mtx_lock(&sc->sc_mtx); 718 719 if (NG_BT_MBUFQ_FULL(queue_ptr)) { 720 NG_BT_MBUFQ_DROP(queue_ptr); 721 NG_FREE_M(m); 722 error = ENOBUFS; 723 } else { 724 NG_BT_MBUFQ_ENQUEUE(queue_ptr, m); 725 /* 726 * start bulk-out transfer, if not already started: 727 */ 728 usb2_transfer_start(sc->sc_xfer[UDBP_T_WR]); 729 error = 0; 730 } 731 732 mtx_unlock(&sc->sc_mtx); 733 734 return (error); 735} 736 737/* 738 * Do local shutdown processing.. 739 * We are a persistant device, we refuse to go away, and 740 * only remove our links and reset ourself. 741 */ 742static int 743ng_udbp_rmnode(node_p node) 744{ 745 struct udbp_softc *sc = NG_NODE_PRIVATE(node); 746 747 /* Let old node go */ 748 NG_NODE_SET_PRIVATE(node, NULL); 749 NG_NODE_UNREF(node); /* forget it ever existed */ 750 751 if (sc == NULL) { 752 goto done; 753 } 754 /* Create Netgraph node */ 755 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { 756 printf("%s: Could not create Netgraph node\n", 757 sc->sc_name); 758 sc->sc_node = NULL; 759 goto done; 760 } 761 /* Name node */ 762 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { 763 printf("%s: Could not name Netgraph node\n", 764 sc->sc_name); 765 NG_NODE_UNREF(sc->sc_node); 766 sc->sc_node = NULL; 767 goto done; 768 } 769 NG_NODE_SET_PRIVATE(sc->sc_node, sc); 770 771done: 772 if (sc) { 773 mtx_unlock(&sc->sc_mtx); 774 } 775 return (0); 776} 777 778/* 779 * This is called once we've already connected a new hook to the other node. 780 * It gives us a chance to balk at the last minute. 781 */ 782static int 783ng_udbp_connect(hook_p hook) 784{ 785 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 786 787 /* probably not at splnet, force outward queueing */ 788 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); 789 790 mtx_lock(&sc->sc_mtx); 791 792 sc->sc_flags |= (UDBP_FLAG_READ_STALL | 793 UDBP_FLAG_WRITE_STALL); 794 795 /* start bulk-in transfer */ 796 usb2_transfer_start(sc->sc_xfer[UDBP_T_RD]); 797 798 /* start bulk-out transfer */ 799 usb2_transfer_start(sc->sc_xfer[UDBP_T_WR]); 800 801 mtx_unlock(&sc->sc_mtx); 802 803 return (0); 804} 805 806/* 807 * Dook disconnection 808 * 809 * For this type, removal of the last link destroys the node 810 */ 811static int 812ng_udbp_disconnect(hook_p hook) 813{ 814 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 815 int error = 0; 816 817 if (sc != NULL) { 818 819 mtx_lock(&sc->sc_mtx); 820 821 if (hook != sc->sc_hook) { 822 error = EINVAL; 823 } else { 824 825 /* stop bulk-in transfer */ 826 usb2_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]); 827 usb2_transfer_stop(sc->sc_xfer[UDBP_T_RD]); 828 829 /* stop bulk-out transfer */ 830 usb2_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]); 831 usb2_transfer_stop(sc->sc_xfer[UDBP_T_WR]); 832 833 /* cleanup queues */ 834 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq); 835 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri); 836 837 if (sc->sc_bulk_in_buffer) { 838 m_freem(sc->sc_bulk_in_buffer); 839 sc->sc_bulk_in_buffer = NULL; 840 } 841 sc->sc_hook = NULL; 842 } 843 844 mtx_unlock(&sc->sc_mtx); 845 } 846 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 847 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) 848 ng_rmnode_self(NG_HOOK_NODE(hook)); 849 850 return (error); 851} 852