vhci.c revision 1.3
1 /* $NetBSD: vhci.c,v 1.3 2019/10/03 05:13:23 maxv Exp $ */ 2 3 /* 4 * Copyright (c) 2019 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Maxime Villard. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: vhci.c,v 1.3 2019/10/03 05:13:23 maxv Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_usb.h" 37 #endif 38 39 #include <sys/param.h> 40 41 #include <sys/bus.h> 42 #include <sys/cpu.h> 43 #include <sys/conf.h> 44 #include <sys/device.h> 45 #include <sys/kernel.h> 46 #include <sys/kmem.h> 47 #include <sys/mutex.h> 48 #include <sys/proc.h> 49 #include <sys/queue.h> 50 #include <sys/systm.h> 51 #include <sys/mman.h> 52 #include <sys/file.h> 53 #include <sys/filedesc.h> 54 55 #include <machine/endian.h> 56 57 #include "ioconf.h" 58 59 #include <dev/usb/usb.h> 60 #include <dev/usb/usbdi.h> 61 #include <dev/usb/usbdivar.h> 62 63 #include <dev/usb/usbroothub.h> 64 65 #ifdef VHCI_DEBUG 66 #define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__) 67 #else 68 #define DPRINTF(fmt, ...) __nothing 69 #endif 70 71 static usbd_status vhci_open(struct usbd_pipe *); 72 static void vhci_softintr(void *); 73 74 static struct usbd_xfer *vhci_allocx(struct usbd_bus *, unsigned int); 75 static void vhci_freex(struct usbd_bus *, struct usbd_xfer *); 76 static void vhci_get_lock(struct usbd_bus *, kmutex_t **); 77 static int vhci_roothub_ctrl(struct usbd_bus *, usb_device_request_t *, 78 void *, int); 79 80 static const struct usbd_bus_methods vhci_bus_methods = { 81 .ubm_open = vhci_open, 82 .ubm_softint = vhci_softintr, 83 .ubm_dopoll = NULL, 84 .ubm_allocx = vhci_allocx, 85 .ubm_freex = vhci_freex, 86 .ubm_getlock = vhci_get_lock, 87 .ubm_rhctrl = vhci_roothub_ctrl, 88 }; 89 90 static usbd_status vhci_device_ctrl_transfer(struct usbd_xfer *); 91 static usbd_status vhci_device_ctrl_start(struct usbd_xfer *); 92 static void vhci_device_ctrl_abort(struct usbd_xfer *); 93 static void vhci_device_ctrl_close(struct usbd_pipe *); 94 static void vhci_device_ctrl_cleartoggle(struct usbd_pipe *); 95 static void vhci_device_ctrl_done(struct usbd_xfer *); 96 97 static const struct usbd_pipe_methods vhci_device_ctrl_methods = { 98 .upm_init = NULL, 99 .upm_fini = NULL, 100 .upm_transfer = vhci_device_ctrl_transfer, 101 .upm_start = vhci_device_ctrl_start, 102 .upm_abort = vhci_device_ctrl_abort, 103 .upm_close = vhci_device_ctrl_close, 104 .upm_cleartoggle = vhci_device_ctrl_cleartoggle, 105 .upm_done = vhci_device_ctrl_done, 106 }; 107 108 static usbd_status vhci_root_intr_transfer(struct usbd_xfer *); 109 static usbd_status vhci_root_intr_start(struct usbd_xfer *); 110 static void vhci_root_intr_abort(struct usbd_xfer *); 111 static void vhci_root_intr_close(struct usbd_pipe *); 112 static void vhci_root_intr_cleartoggle(struct usbd_pipe *); 113 static void vhci_root_intr_done(struct usbd_xfer *); 114 115 static const struct usbd_pipe_methods vhci_root_intr_methods = { 116 .upm_init = NULL, 117 .upm_fini = NULL, 118 .upm_transfer = vhci_root_intr_transfer, 119 .upm_start = vhci_root_intr_start, 120 .upm_abort = vhci_root_intr_abort, 121 .upm_close = vhci_root_intr_close, 122 .upm_cleartoggle = vhci_root_intr_cleartoggle, 123 .upm_done = vhci_root_intr_done, 124 }; 125 126 typedef struct vhci_packet { 127 TAILQ_ENTRY(vhci_packet) portlist; 128 TAILQ_ENTRY(vhci_packet) xferlist; 129 struct usbd_xfer *xfer; /* also vxfer */ 130 bool utoh; 131 uint8_t *buf; 132 size_t size; 133 size_t cursor; 134 } vhci_packet_t; 135 136 typedef TAILQ_HEAD(, vhci_packet) vhci_packet_list_t; 137 138 typedef struct { 139 kmutex_t lock; 140 int status; 141 int change; 142 struct { 143 vhci_packet_list_t usb_to_host; 144 vhci_packet_list_t host_to_usb; 145 } pkts_device_ctrl; 146 } vhci_port_t; 147 148 typedef struct { 149 struct usbd_pipe pipe; 150 } vhci_pipe_t; 151 152 typedef struct vhci_xfer { 153 /* General. */ 154 struct usbd_xfer xfer; 155 156 /* vHCI-specific. */ 157 size_t refcnt; 158 vhci_port_t *port; 159 vhci_packet_list_t pkts; 160 TAILQ_ENTRY(vhci_xfer) freelist; 161 } vhci_xfer_t; 162 163 typedef TAILQ_HEAD(, vhci_xfer) vhci_xfer_list_t; 164 165 #define VHCI_INDEX2PORT(idx) (idx) 166 #define VHCI_NPORTS 4 167 168 typedef struct { 169 device_t sc_dev; 170 171 struct usbd_bus sc_bus; 172 bool sc_dying; 173 kmutex_t sc_lock; 174 175 /* 176 * Intr Root. Used to attach the devices. 177 */ 178 struct usbd_xfer *sc_intrxfer; 179 180 /* 181 * The ports. Zero is for the roothub, one and beyond for the USB 182 * devices. 183 */ 184 size_t sc_nports; 185 vhci_port_t sc_port[VHCI_NPORTS]; 186 187 device_t sc_child; /* /dev/usb# device */ 188 } vhci_softc_t; 189 190 typedef struct { 191 u_int port; 192 vhci_softc_t *softc; 193 } vhci_fd_t; 194 195 extern struct cfdriver vhci_cd; 196 197 /* -------------------------------------------------------------------------- */ 198 199 static void 200 vhci_pkt_create(vhci_port_t *port, struct usbd_xfer *xfer, bool usb_to_host) 201 { 202 vhci_xfer_t *vxfer = (vhci_xfer_t *)xfer; 203 vhci_packet_list_t *reqlist, *pktlist; 204 vhci_packet_t *req, *pkt = NULL; 205 size_t refcnt = 0; 206 207 /* Setup packet. */ 208 reqlist = &port->pkts_device_ctrl.host_to_usb; 209 req = kmem_zalloc(sizeof(*req), KM_SLEEP); 210 req->xfer = xfer; 211 req->utoh = false; 212 req->buf = (uint8_t *)&xfer->ux_request; 213 req->size = sizeof(xfer->ux_request); 214 req->cursor = 0; 215 refcnt++; 216 217 /* Data packet. */ 218 if (xfer->ux_length > 0) { 219 if (usb_to_host) { 220 pktlist = &port->pkts_device_ctrl.usb_to_host; 221 } else { 222 pktlist = &port->pkts_device_ctrl.host_to_usb; 223 } 224 pkt = kmem_zalloc(sizeof(*pkt), KM_SLEEP); 225 pkt->xfer = xfer; 226 pkt->utoh = usb_to_host; 227 pkt->buf = xfer->ux_buf; 228 pkt->size = xfer->ux_length; 229 pkt->cursor = 0; 230 refcnt++; 231 } 232 233 /* Insert in the xfer. */ 234 vxfer->refcnt = refcnt; 235 vxfer->port = port; 236 TAILQ_INIT(&vxfer->pkts); 237 TAILQ_INSERT_TAIL(&vxfer->pkts, req, xferlist); 238 if (pkt != NULL) 239 TAILQ_INSERT_TAIL(&vxfer->pkts, pkt, xferlist); 240 241 /* Insert in the port. */ 242 KASSERT(mutex_owned(&port->lock)); 243 TAILQ_INSERT_TAIL(reqlist, req, portlist); 244 if (pkt != NULL) 245 TAILQ_INSERT_TAIL(pktlist, pkt, portlist); 246 } 247 248 static void 249 vhci_pkt_destroy(vhci_softc_t *sc, vhci_packet_t *pkt) 250 { 251 struct usbd_xfer *xfer = pkt->xfer; 252 vhci_xfer_t *vxfer = (vhci_xfer_t *)xfer; 253 vhci_port_t *port = vxfer->port; 254 vhci_packet_list_t *pktlist; 255 256 KASSERT(mutex_owned(&port->lock)); 257 258 if (pkt->utoh) { 259 pktlist = &port->pkts_device_ctrl.usb_to_host; 260 } else { 261 pktlist = &port->pkts_device_ctrl.host_to_usb; 262 } 263 TAILQ_REMOVE(pktlist, pkt, portlist); 264 265 TAILQ_REMOVE(&vxfer->pkts, pkt, xferlist); 266 kmem_free(pkt, sizeof(*pkt)); 267 268 KASSERT(vxfer->refcnt > 0); 269 vxfer->refcnt--; 270 if (vxfer->refcnt > 0) 271 return; 272 273 KASSERT(TAILQ_FIRST(&vxfer->pkts) == NULL); 274 } 275 276 /* -------------------------------------------------------------------------- */ 277 278 static usbd_status 279 vhci_open(struct usbd_pipe *pipe) 280 { 281 struct usbd_device *dev = pipe->up_dev; 282 struct usbd_bus *bus = dev->ud_bus; 283 usb_endpoint_descriptor_t *ed = pipe->up_endpoint->ue_edesc; 284 vhci_softc_t *sc = bus->ub_hcpriv; 285 uint8_t addr = dev->ud_addr; 286 287 if (sc->sc_dying) 288 return USBD_IOERROR; 289 290 DPRINTF("%s: called, type=%d\n", __func__, 291 UE_GET_XFERTYPE(ed->bmAttributes)); 292 293 if (addr == bus->ub_rhaddr) { 294 switch (ed->bEndpointAddress) { 295 case USB_CONTROL_ENDPOINT: 296 DPRINTF("%s: roothub_ctrl\n", __func__); 297 pipe->up_methods = &roothub_ctrl_methods; 298 break; 299 case UE_DIR_IN | USBROOTHUB_INTR_ENDPT: 300 DPRINTF("%s: root_intr\n", __func__); 301 pipe->up_methods = &vhci_root_intr_methods; 302 break; 303 default: 304 DPRINTF("%s: inval\n", __func__); 305 return USBD_INVAL; 306 } 307 } else { 308 switch (UE_GET_XFERTYPE(ed->bmAttributes)) { 309 case UE_CONTROL: 310 pipe->up_methods = &vhci_device_ctrl_methods; 311 break; 312 case UE_BULK: 313 case UE_INTERRUPT: 314 default: 315 goto bad; 316 } 317 } 318 319 return USBD_NORMAL_COMPLETION; 320 321 bad: 322 return USBD_NOMEM; 323 } 324 325 static void 326 vhci_softintr(void *v) 327 { 328 DPRINTF("%s: called\n", __func__); 329 } 330 331 static struct usbd_xfer * 332 vhci_allocx(struct usbd_bus *bus, unsigned int nframes) 333 { 334 vhci_xfer_t *vxfer; 335 336 vxfer = kmem_zalloc(sizeof(*vxfer), KM_SLEEP); 337 #ifdef DIAGNOSTIC 338 vxfer->xfer.ux_state = XFER_BUSY; 339 #endif 340 return (struct usbd_xfer *)vxfer; 341 } 342 343 static void 344 vhci_freex(struct usbd_bus *bus, struct usbd_xfer *xfer) 345 { 346 vhci_xfer_t *vxfer = (vhci_xfer_t *)xfer; 347 348 KASSERT(vxfer->refcnt == 0); 349 KASSERT(TAILQ_FIRST(&vxfer->pkts) == NULL); 350 351 #ifdef DIAGNOSTIC 352 vxfer->xfer.ux_state = XFER_FREE; 353 #endif 354 kmem_free(vxfer, sizeof(*vxfer)); 355 } 356 357 static void 358 vhci_get_lock(struct usbd_bus *bus, kmutex_t **lock) 359 { 360 vhci_softc_t *sc = bus->ub_hcpriv; 361 362 *lock = &sc->sc_lock; 363 } 364 365 static int 366 vhci_roothub_ctrl(struct usbd_bus *bus, usb_device_request_t *req, 367 void *buf, int buflen) 368 { 369 vhci_softc_t *sc = bus->ub_hcpriv; 370 vhci_port_t *port; 371 usb_hub_descriptor_t hubd; 372 uint16_t len, value, index; 373 int totlen = 0; 374 375 len = UGETW(req->wLength); 376 value = UGETW(req->wValue); 377 index = UGETW(req->wIndex); 378 379 port = &sc->sc_port[VHCI_INDEX2PORT(index)]; 380 381 #define C(x,y) ((x) | ((y) << 8)) 382 switch (C(req->bRequest, req->bmRequestType)) { 383 case C(UR_GET_DESCRIPTOR, UT_READ_DEVICE): 384 switch (value) { 385 case C(0, UDESC_DEVICE): { 386 usb_device_descriptor_t devd; 387 388 totlen = uimin(buflen, sizeof(devd)); 389 memcpy(&devd, buf, totlen); 390 USETW(devd.idVendor, 0); 391 USETW(devd.idProduct, 0); 392 memcpy(buf, &devd, totlen); 393 break; 394 } 395 #define sd ((usb_string_descriptor_t *)buf) 396 case C(1, UDESC_STRING): 397 /* Vendor */ 398 totlen = usb_makestrdesc(sd, len, "NetBSD"); 399 break; 400 case C(2, UDESC_STRING): 401 /* Product */ 402 totlen = usb_makestrdesc(sd, len, "VHCI root hub"); 403 break; 404 #undef sd 405 default: 406 /* default from usbroothub */ 407 return buflen; 408 } 409 break; 410 411 case C(UR_SET_FEATURE, UT_WRITE_CLASS_OTHER): 412 switch (value) { 413 case UHF_PORT_RESET: 414 if (index < 1 || index >= sc->sc_nports) { 415 return -1; 416 } 417 port->status |= UPS_C_PORT_RESET; 418 break; 419 case UHF_PORT_POWER: 420 break; 421 default: 422 return -1; 423 } 424 break; 425 426 /* Hub requests. */ 427 case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_DEVICE): 428 break; 429 case C(UR_CLEAR_FEATURE, UT_WRITE_CLASS_OTHER): 430 if (index < 1 || index >= sc->sc_nports) { 431 return -1; 432 } 433 switch (value) { 434 case UHF_PORT_ENABLE: 435 port->status &= ~UPS_PORT_ENABLED; 436 break; 437 case UHF_C_PORT_ENABLE: 438 port->change |= UPS_C_PORT_ENABLED; 439 break; 440 default: 441 return -1; 442 } 443 break; 444 445 case C(UR_GET_DESCRIPTOR, UT_READ_CLASS_DEVICE): 446 totlen = uimin(buflen, sizeof(hubd)); 447 memcpy(&hubd, buf, totlen); 448 hubd.bNbrPorts = sc->sc_nports - 1; 449 hubd.bDescLength = USB_HUB_DESCRIPTOR_SIZE; 450 totlen = uimin(totlen, hubd.bDescLength); 451 memcpy(buf, &hubd, totlen); 452 break; 453 454 case C(UR_GET_STATUS, UT_READ_CLASS_DEVICE): 455 /* XXX The other HCs do this */ 456 memset(buf, 0, len); 457 totlen = len; 458 break; 459 460 case C(UR_GET_STATUS, UT_READ_CLASS_OTHER): { 461 usb_port_status_t ps; 462 463 if (index < 1 || index >= sc->sc_nports) { 464 return -1; 465 } 466 USETW(ps.wPortStatus, port->status); 467 USETW(ps.wPortChange, port->change); 468 totlen = uimin(len, sizeof(ps)); 469 memcpy(buf, &ps, totlen); 470 break; 471 } 472 default: 473 /* default from usbroothub */ 474 return buflen; 475 } 476 477 return totlen; 478 } 479 480 /* -------------------------------------------------------------------------- */ 481 482 static usbd_status 483 vhci_device_ctrl_transfer(struct usbd_xfer *xfer) 484 { 485 vhci_softc_t *sc = xfer->ux_bus->ub_hcpriv; 486 usbd_status err; 487 488 DPRINTF("%s: called\n", __func__); 489 490 /* Insert last in queue. */ 491 mutex_enter(&sc->sc_lock); 492 err = usb_insert_transfer(xfer); 493 mutex_exit(&sc->sc_lock); 494 if (err) 495 return err; 496 497 /* Pipe isn't running, start first */ 498 return vhci_device_ctrl_start(SIMPLEQ_FIRST(&xfer->ux_pipe->up_queue)); 499 } 500 501 static usbd_status 502 vhci_device_ctrl_start(struct usbd_xfer *xfer) 503 { 504 usb_device_request_t *req = &xfer->ux_request; 505 struct usbd_device *dev = xfer->ux_pipe->up_dev; 506 vhci_softc_t *sc = xfer->ux_bus->ub_hcpriv; 507 vhci_port_t *port; 508 bool polling = sc->sc_bus.ub_usepolling; 509 bool isread = (req->bmRequestType & UT_READ) != 0; 510 int portno, ret; 511 512 KASSERT(xfer->ux_rqflags & URQ_REQUEST); 513 KASSERT(dev->ud_myhsport != NULL); 514 portno = dev->ud_myhsport->up_portno; 515 516 DPRINTF("%s: type=0x%02x, len=%d, isread=%d, portno=%d\n", 517 __func__, req->bmRequestType, UGETW(req->wLength), isread, portno); 518 519 if (sc->sc_dying) 520 return USBD_IOERROR; 521 522 port = &sc->sc_port[portno]; 523 524 if (!polling) 525 mutex_enter(&sc->sc_lock); 526 527 mutex_enter(&port->lock); 528 if (port->status & UPS_PORT_ENABLED) { 529 xfer->ux_status = USBD_IN_PROGRESS; 530 vhci_pkt_create(port, xfer, isread); 531 ret = USBD_IN_PROGRESS; 532 } else { 533 ret = USBD_IOERROR; 534 } 535 mutex_exit(&port->lock); 536 537 if (!polling) 538 mutex_exit(&sc->sc_lock); 539 540 return ret; 541 } 542 543 static void 544 vhci_device_ctrl_abort(struct usbd_xfer *xfer) 545 { 546 vhci_xfer_t *vxfer = (vhci_xfer_t *)xfer; 547 vhci_softc_t *sc = xfer->ux_bus->ub_hcpriv; 548 vhci_port_t *port = vxfer->port; 549 vhci_packet_t *pkt; 550 551 DPRINTF("%s: called\n", __func__); 552 553 KASSERT(mutex_owned(&sc->sc_lock)); 554 555 callout_halt(&xfer->ux_callout, &sc->sc_lock); 556 557 KASSERT(xfer->ux_status != USBD_CANCELLED); 558 559 /* If anyone else beat us, we're done. */ 560 if (xfer->ux_status != USBD_IN_PROGRESS) 561 return; 562 563 mutex_enter(&port->lock); 564 while (vxfer->refcnt > 0) { 565 pkt = TAILQ_FIRST(&vxfer->pkts); 566 KASSERT(pkt != NULL); 567 vhci_pkt_destroy(sc, pkt); 568 } 569 KASSERT(TAILQ_FIRST(&vxfer->pkts) == NULL); 570 mutex_exit(&port->lock); 571 572 xfer->ux_status = USBD_CANCELLED; 573 usb_transfer_complete(xfer); 574 KASSERT(mutex_owned(&sc->sc_lock)); 575 } 576 577 static void 578 vhci_device_ctrl_close(struct usbd_pipe *pipe) 579 { 580 DPRINTF("%s: called\n", __func__); 581 } 582 583 static void 584 vhci_device_ctrl_cleartoggle(struct usbd_pipe *pipe) 585 { 586 DPRINTF("%s: called\n", __func__); 587 } 588 589 static void 590 vhci_device_ctrl_done(struct usbd_xfer *xfer) 591 { 592 DPRINTF("%s: called\n", __func__); 593 } 594 595 /* -------------------------------------------------------------------------- */ 596 597 static usbd_status 598 vhci_root_intr_transfer(struct usbd_xfer *xfer) 599 { 600 vhci_softc_t *sc = xfer->ux_bus->ub_hcpriv; 601 usbd_status err; 602 603 DPRINTF("%s: called\n", __func__); 604 605 /* Insert last in queue. */ 606 mutex_enter(&sc->sc_lock); 607 err = usb_insert_transfer(xfer); 608 mutex_exit(&sc->sc_lock); 609 if (err) 610 return err; 611 612 /* Pipe isn't running, start first */ 613 return vhci_root_intr_start(SIMPLEQ_FIRST(&xfer->ux_pipe->up_queue)); 614 } 615 616 static usbd_status 617 vhci_root_intr_start(struct usbd_xfer *xfer) 618 { 619 vhci_softc_t *sc = xfer->ux_bus->ub_hcpriv; 620 const bool polling = sc->sc_bus.ub_usepolling; 621 622 DPRINTF("%s: called, len=%zu\n", __func__, (size_t)xfer->ux_length); 623 624 if (sc->sc_dying) 625 return USBD_IOERROR; 626 627 if (!polling) 628 mutex_enter(&sc->sc_lock); 629 sc->sc_intrxfer = xfer; 630 if (!polling) 631 mutex_exit(&sc->sc_lock); 632 633 return USBD_IN_PROGRESS; 634 } 635 636 static void 637 vhci_root_intr_abort(struct usbd_xfer *xfer) 638 { 639 vhci_softc_t *sc = xfer->ux_bus->ub_hcpriv; 640 641 DPRINTF("%s: called\n", __func__); 642 643 KASSERT(mutex_owned(&sc->sc_lock)); 644 KASSERT(xfer->ux_pipe->up_intrxfer == xfer); 645 646 sc->sc_intrxfer = NULL; 647 648 xfer->ux_status = USBD_CANCELLED; 649 usb_transfer_complete(xfer); 650 } 651 652 static void 653 vhci_root_intr_close(struct usbd_pipe *pipe) 654 { 655 vhci_softc_t *sc = pipe->up_dev->ud_bus->ub_hcpriv; 656 657 DPRINTF("%s: called\n", __func__); 658 659 KASSERT(mutex_owned(&sc->sc_lock)); 660 661 sc->sc_intrxfer = NULL; 662 } 663 664 static void 665 vhci_root_intr_cleartoggle(struct usbd_pipe *pipe) 666 { 667 DPRINTF("%s: called\n", __func__); 668 } 669 670 static void 671 vhci_root_intr_done(struct usbd_xfer *xfer) 672 { 673 } 674 675 /* -------------------------------------------------------------------------- */ 676 677 struct vhci_ioc_get_info { 678 /* General. */ 679 size_t nports; 680 681 /* Current port. */ 682 u_int port; 683 int status; 684 }; 685 686 struct vhci_ioc_set_port { 687 u_int port; 688 }; 689 690 struct vhci_ioc_usb_attach { 691 u_int port; 692 }; 693 694 struct vhci_ioc_usb_detach { 695 u_int port; 696 }; 697 698 #define VHCI_IOC_GET_INFO _IOR('V', 0, struct vhci_ioc_get_info) 699 #define VHCI_IOC_SET_PORT _IOW('V', 1, struct vhci_ioc_set_port) 700 #define VHCI_IOC_USB_ATTACH _IOW('V', 10, struct vhci_ioc_usb_attach) 701 #define VHCI_IOC_USB_DETACH _IOW('V', 11, struct vhci_ioc_usb_detach) 702 703 static int 704 vhci_usb_attach(vhci_fd_t *vfd, struct vhci_ioc_usb_attach *args) 705 { 706 vhci_softc_t *sc = vfd->softc; 707 vhci_port_t *port; 708 struct usbd_xfer *xfer; 709 u_char *p; 710 int ret = 0; 711 712 if (args->port == 0 || args->port >= sc->sc_nports) 713 return EINVAL; 714 port = &sc->sc_port[args->port]; 715 716 mutex_enter(&sc->sc_lock); 717 718 mutex_enter(&port->lock); 719 port->status = UPS_CURRENT_CONNECT_STATUS | UPS_PORT_ENABLED | 720 UPS_PORT_POWER; 721 port->change = UPS_C_CONNECT_STATUS | UPS_C_PORT_RESET; 722 mutex_exit(&port->lock); 723 724 xfer = sc->sc_intrxfer; 725 726 if (xfer == NULL) { 727 ret = ENOBUFS; 728 goto done; 729 } 730 731 p = xfer->ux_buf; 732 memset(p, 0, xfer->ux_length); 733 p[0] = __BIT(args->port); 734 xfer->ux_actlen = xfer->ux_length; 735 xfer->ux_status = USBD_NORMAL_COMPLETION; 736 737 usb_transfer_complete(xfer); 738 739 done: 740 mutex_exit(&sc->sc_lock); 741 return ret; 742 } 743 744 static void 745 vhci_port_flush(vhci_softc_t *sc, vhci_port_t *port) 746 { 747 vhci_packet_list_t *pktlist; 748 vhci_packet_t *pkt, *nxt; 749 vhci_xfer_list_t vxferlist; 750 vhci_xfer_t *vxfer; 751 752 KASSERT(mutex_owned(&sc->sc_lock)); 753 KASSERT(mutex_owned(&port->lock)); 754 755 TAILQ_INIT(&vxferlist); 756 757 pktlist = &port->pkts_device_ctrl.host_to_usb; 758 TAILQ_FOREACH_SAFE(pkt, pktlist, portlist, nxt) { 759 vxfer = (vhci_xfer_t *)pkt->xfer; 760 KASSERT(vxfer->xfer.ux_status == USBD_IN_PROGRESS); 761 vhci_pkt_destroy(sc, pkt); 762 if (vxfer->refcnt == 0) 763 TAILQ_INSERT_TAIL(&vxferlist, vxfer, freelist); 764 } 765 KASSERT(TAILQ_FIRST(pktlist) == NULL); 766 767 pktlist = &port->pkts_device_ctrl.usb_to_host; 768 TAILQ_FOREACH_SAFE(pkt, pktlist, portlist, nxt) { 769 vxfer = (vhci_xfer_t *)pkt->xfer; 770 KASSERT(vxfer->xfer.ux_status == USBD_IN_PROGRESS); 771 vhci_pkt_destroy(sc, pkt); 772 if (vxfer->refcnt == 0) 773 TAILQ_INSERT_TAIL(&vxferlist, vxfer, freelist); 774 } 775 KASSERT(TAILQ_FIRST(pktlist) == NULL); 776 777 while ((vxfer = TAILQ_FIRST(&vxferlist)) != NULL) { 778 struct usbd_xfer *xfer = &vxfer->xfer; 779 TAILQ_REMOVE(&vxferlist, vxfer, freelist); 780 781 xfer->ux_status = USBD_TIMEOUT; 782 usb_transfer_complete(xfer); 783 } 784 } 785 786 static int 787 vhci_usb_detach(vhci_fd_t *vfd, struct vhci_ioc_usb_detach *args) 788 { 789 vhci_softc_t *sc = vfd->softc; 790 vhci_port_t *port; 791 struct usbd_xfer *xfer; 792 u_char *p; 793 794 if (args->port == 0 || args->port >= sc->sc_nports) 795 return EINVAL; 796 port = &sc->sc_port[args->port]; 797 798 mutex_enter(&sc->sc_lock); 799 800 xfer = sc->sc_intrxfer; 801 if (xfer == NULL) { 802 mutex_exit(&sc->sc_lock); 803 return ENOBUFS; 804 } 805 806 mutex_enter(&port->lock); 807 808 port->status = 0; 809 port->change = UPS_C_CONNECT_STATUS | UPS_C_PORT_RESET; 810 811 p = xfer->ux_buf; 812 memset(p, 0, xfer->ux_length); 813 p[0] = __BIT(args->port); 814 xfer->ux_actlen = xfer->ux_length; 815 xfer->ux_status = USBD_NORMAL_COMPLETION; 816 817 usb_transfer_complete(xfer); 818 vhci_port_flush(sc, port); 819 820 mutex_exit(&port->lock); 821 mutex_exit(&sc->sc_lock); 822 return 0; 823 } 824 825 static int 826 vhci_get_info(vhci_fd_t *vfd, struct vhci_ioc_get_info *args) 827 { 828 vhci_softc_t *sc = vfd->softc; 829 vhci_port_t *port; 830 831 port = &sc->sc_port[vfd->port]; 832 833 args->nports = VHCI_NPORTS; 834 args->port = vfd->port; 835 mutex_enter(&port->lock); 836 args->status = port->status; 837 mutex_exit(&port->lock); 838 839 return 0; 840 } 841 842 static int 843 vhci_set_port(vhci_fd_t *vfd, struct vhci_ioc_set_port *args) 844 { 845 vhci_softc_t *sc = vfd->softc; 846 847 if (args->port == 0 || args->port >= sc->sc_nports) 848 return EINVAL; 849 850 vfd->port = args->port; 851 852 return 0; 853 } 854 855 /* -------------------------------------------------------------------------- */ 856 857 static dev_type_open(vhci_fd_open); 858 859 const struct cdevsw vhci_cdevsw = { 860 .d_open = vhci_fd_open, 861 .d_close = noclose, 862 .d_read = noread, 863 .d_write = nowrite, 864 .d_ioctl = noioctl, 865 .d_stop = nostop, 866 .d_tty = notty, 867 .d_poll = nopoll, 868 .d_mmap = nommap, 869 .d_kqfilter = nokqfilter, 870 .d_discard = nodiscard, 871 .d_flag = D_OTHER | D_MPSAFE 872 }; 873 874 static int vhci_fd_ioctl(file_t *, u_long, void *); 875 static int vhci_fd_close(file_t *); 876 static int vhci_fd_read(struct file *, off_t *, struct uio *, kauth_cred_t, int); 877 static int vhci_fd_write(struct file *, off_t *, struct uio *, kauth_cred_t, int); 878 879 const struct fileops vhci_fileops = { 880 .fo_read = vhci_fd_read, 881 .fo_write = vhci_fd_write, 882 .fo_ioctl = vhci_fd_ioctl, 883 .fo_fcntl = fnullop_fcntl, 884 .fo_poll = fnullop_poll, 885 .fo_stat = fbadop_stat, 886 .fo_close = vhci_fd_close, 887 .fo_kqfilter = fnullop_kqfilter, 888 .fo_restart = fnullop_restart, 889 .fo_mmap = NULL, 890 }; 891 892 static int 893 vhci_fd_open(dev_t dev, int flags, int type, struct lwp *l) 894 { 895 vhci_fd_t *vfd; 896 struct file *fp; 897 int error, fd; 898 899 if (minor(dev) != 0) 900 return EXDEV; 901 error = fd_allocfile(&fp, &fd); 902 if (error) 903 return error; 904 905 vfd = kmem_alloc(sizeof(*vfd), KM_SLEEP); 906 vfd->port = 1; 907 vfd->softc = device_lookup_private(&vhci_cd, minor(dev)); 908 909 return fd_clone(fp, fd, flags, &vhci_fileops, vfd); 910 } 911 912 static int 913 vhci_fd_close(file_t *fp) 914 { 915 struct vhci_ioc_usb_detach args; 916 vhci_fd_t *vfd = fp->f_data; 917 int ret __diagused; 918 919 KASSERT(vfd != NULL); 920 921 args.port = vfd->port; 922 ret = vhci_usb_detach(vfd, &args); 923 KASSERT(ret == 0); 924 925 kmem_free(vfd, sizeof(*vfd)); 926 fp->f_data = NULL; 927 928 return 0; 929 } 930 931 static int 932 vhci_fd_read(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 933 int flags) 934 { 935 vhci_fd_t *vfd = fp->f_data; 936 vhci_softc_t *sc = vfd->softc; 937 vhci_packet_list_t *pktlist; 938 vhci_packet_t *pkt, *nxt; 939 vhci_xfer_list_t vxferlist; 940 vhci_xfer_t *vxfer; 941 vhci_port_t *port; 942 int error = 0; 943 uint8_t *buf; 944 size_t size; 945 946 if (uio->uio_resid == 0) 947 return 0; 948 port = &sc->sc_port[vfd->port]; 949 pktlist = &port->pkts_device_ctrl.host_to_usb; 950 951 TAILQ_INIT(&vxferlist); 952 953 mutex_enter(&port->lock); 954 955 if (!(port->status & UPS_PORT_ENABLED)) { 956 error = ENOBUFS; 957 goto out; 958 } 959 960 TAILQ_FOREACH_SAFE(pkt, pktlist, portlist, nxt) { 961 vxfer = (vhci_xfer_t *)pkt->xfer; 962 buf = pkt->buf + pkt->cursor; 963 KASSERT(pkt->size >= pkt->cursor); 964 size = uimin(uio->uio_resid, pkt->size - pkt->cursor); 965 966 KASSERT(vxfer->xfer.ux_status == USBD_IN_PROGRESS); 967 968 error = uiomove(buf, size, uio); 969 if (error) { 970 DPRINTF("%s: error = %d\n", __func__, error); 971 goto out; 972 } 973 974 pkt->cursor += size; 975 976 if (pkt->cursor == pkt->size) { 977 vhci_pkt_destroy(sc, pkt); 978 if (vxfer->refcnt == 0) { 979 TAILQ_INSERT_TAIL(&vxferlist, vxfer, freelist); 980 } 981 } 982 if (uio->uio_resid == 0) { 983 break; 984 } 985 } 986 987 out: 988 mutex_exit(&port->lock); 989 990 while ((vxfer = TAILQ_FIRST(&vxferlist)) != NULL) { 991 struct usbd_xfer *xfer = &vxfer->xfer; 992 TAILQ_REMOVE(&vxferlist, vxfer, freelist); 993 994 mutex_enter(&sc->sc_lock); 995 xfer->ux_actlen = xfer->ux_length; 996 xfer->ux_status = USBD_NORMAL_COMPLETION; 997 usb_transfer_complete(xfer); 998 mutex_exit(&sc->sc_lock); 999 } 1000 1001 return error; 1002 } 1003 1004 static int 1005 vhci_fd_write(struct file *fp, off_t *offp, struct uio *uio, kauth_cred_t cred, 1006 int flags) 1007 { 1008 vhci_fd_t *vfd = fp->f_data; 1009 vhci_softc_t *sc = vfd->softc; 1010 vhci_packet_list_t *pktlist; 1011 vhci_packet_t *pkt, *nxt; 1012 vhci_xfer_list_t vxferlist; 1013 vhci_xfer_t *vxfer; 1014 vhci_port_t *port; 1015 int error = 0; 1016 uint8_t *buf; 1017 size_t size; 1018 1019 if (uio->uio_resid == 0) 1020 return 0; 1021 port = &sc->sc_port[vfd->port]; 1022 pktlist = &port->pkts_device_ctrl.usb_to_host; 1023 1024 TAILQ_INIT(&vxferlist); 1025 1026 mutex_enter(&port->lock); 1027 1028 if (!(port->status & UPS_PORT_ENABLED)) { 1029 error = ENOBUFS; 1030 goto out; 1031 } 1032 1033 TAILQ_FOREACH_SAFE(pkt, pktlist, portlist, nxt) { 1034 vxfer = (vhci_xfer_t *)pkt->xfer; 1035 buf = pkt->buf + pkt->cursor; 1036 KASSERT(pkt->size >= pkt->cursor); 1037 size = uimin(uio->uio_resid, pkt->size - pkt->cursor); 1038 1039 KASSERT(vxfer->xfer.ux_status == USBD_IN_PROGRESS); 1040 1041 error = uiomove(buf, size, uio); 1042 if (error) { 1043 DPRINTF("%s: error = %d\n", __func__, error); 1044 goto out; 1045 } 1046 1047 pkt->cursor += size; 1048 1049 if (pkt->cursor == pkt->size) { 1050 vhci_pkt_destroy(sc, pkt); 1051 if (vxfer->refcnt == 0) { 1052 TAILQ_INSERT_TAIL(&vxferlist, vxfer, freelist); 1053 } 1054 } 1055 if (uio->uio_resid == 0) { 1056 break; 1057 } 1058 } 1059 1060 out: 1061 mutex_exit(&port->lock); 1062 1063 while ((vxfer = TAILQ_FIRST(&vxferlist)) != NULL) { 1064 struct usbd_xfer *xfer = &vxfer->xfer; 1065 TAILQ_REMOVE(&vxferlist, vxfer, freelist); 1066 1067 mutex_enter(&sc->sc_lock); 1068 xfer->ux_actlen = xfer->ux_length; 1069 xfer->ux_status = USBD_NORMAL_COMPLETION; 1070 usb_transfer_complete(xfer); 1071 mutex_exit(&sc->sc_lock); 1072 } 1073 1074 return error; 1075 } 1076 1077 static int 1078 vhci_fd_ioctl(file_t *fp, u_long cmd, void *data) 1079 { 1080 vhci_fd_t *vfd = fp->f_data; 1081 1082 KASSERT(vfd != NULL); 1083 1084 switch (cmd) { 1085 case VHCI_IOC_GET_INFO: 1086 return vhci_get_info(vfd, data); 1087 case VHCI_IOC_SET_PORT: 1088 return vhci_set_port(vfd, data); 1089 case VHCI_IOC_USB_ATTACH: 1090 return vhci_usb_attach(vfd, data); 1091 case VHCI_IOC_USB_DETACH: 1092 return vhci_usb_detach(vfd, data); 1093 default: 1094 return EINVAL; 1095 } 1096 } 1097 1098 /* -------------------------------------------------------------------------- */ 1099 1100 static int vhci_match(device_t, cfdata_t, void *); 1101 static void vhci_attach(device_t, device_t, void *); 1102 static int vhci_activate(device_t, enum devact); 1103 1104 CFATTACH_DECL_NEW(vhci, sizeof(vhci_softc_t), vhci_match, vhci_attach, 1105 NULL, vhci_activate); 1106 1107 void 1108 vhciattach(int nunits) 1109 { 1110 static struct cfdata vhci_cfdata = { 1111 .cf_name = "vhci", 1112 .cf_atname = "vhci", 1113 .cf_unit = 0, 1114 .cf_fstate = FSTATE_STAR, 1115 }; 1116 int error; 1117 1118 error = config_cfattach_attach(vhci_cd.cd_name, &vhci_ca); 1119 if (error) { 1120 aprint_error("%s: unable to register cfattach\n", 1121 vhci_cd.cd_name); 1122 (void)config_cfdriver_detach(&vhci_cd); 1123 return; 1124 } 1125 1126 config_attach_pseudo(&vhci_cfdata); 1127 } 1128 1129 static int 1130 vhci_activate(device_t self, enum devact act) 1131 { 1132 vhci_softc_t *sc = device_private(self); 1133 1134 switch (act) { 1135 case DVACT_DEACTIVATE: 1136 sc->sc_dying = 1; 1137 return 0; 1138 default: 1139 return EOPNOTSUPP; 1140 } 1141 } 1142 1143 static int 1144 vhci_match(device_t parent, cfdata_t match, void *aux) 1145 { 1146 return 1; 1147 } 1148 1149 static void 1150 vhci_attach(device_t parent, device_t self, void *aux) 1151 { 1152 vhci_softc_t *sc = device_private(self); 1153 vhci_port_t *port; 1154 size_t i; 1155 1156 sc->sc_dev = self; 1157 sc->sc_bus.ub_revision = USBREV_2_0; 1158 sc->sc_bus.ub_usedma = false; 1159 sc->sc_bus.ub_methods = &vhci_bus_methods; 1160 sc->sc_bus.ub_pipesize = sizeof(vhci_pipe_t); 1161 sc->sc_bus.ub_hcpriv = sc; 1162 sc->sc_dying = false; 1163 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); 1164 1165 sc->sc_nports = VHCI_NPORTS; 1166 for (i = 0; i < sc->sc_nports; i++) { 1167 port = &sc->sc_port[i]; 1168 mutex_init(&port->lock, MUTEX_DEFAULT, IPL_SOFTUSB); 1169 TAILQ_INIT(&port->pkts_device_ctrl.usb_to_host); 1170 TAILQ_INIT(&port->pkts_device_ctrl.host_to_usb); 1171 } 1172 1173 sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint); 1174 } 1175
Indexes created Sat Sep 27 22:09:54 GMT 2025