/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * * USB generic serial driver (GSD) * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* autoconfiguration subroutines */ static int usbser_rseq_do_cb(rseq_t *, int, uintptr_t); static int usbser_free_soft_state(usbser_state_t *); static int usbser_init_soft_state(usbser_state_t *); static int usbser_fini_soft_state(usbser_state_t *); static int usbser_attach_dev(usbser_state_t *); static void usbser_detach_dev(usbser_state_t *); static int usbser_attach_ports(usbser_state_t *); static int usbser_create_port_minor_nodes(usbser_state_t *, int); static void usbser_detach_ports(usbser_state_t *); static int usbser_create_taskq(usbser_state_t *); static void usbser_destroy_taskq(usbser_state_t *); static void usbser_set_dev_state_init(usbser_state_t *); /* hotplugging and power management */ static int usbser_disconnect_cb(dev_info_t *); static int usbser_reconnect_cb(dev_info_t *); static void usbser_disconnect_ports(usbser_state_t *); static int usbser_cpr_suspend(dev_info_t *); static int usbser_suspend_ports(usbser_state_t *); static void usbser_cpr_resume(dev_info_t *); static int usbser_restore_device_state(usbser_state_t *); static void usbser_restore_ports_state(usbser_state_t *); /* STREAMS subroutines */ static int usbser_open_setup(queue_t *, usbser_port_t *, int, int, cred_t *); static int usbser_open_init(usbser_port_t *, int); static void usbser_check_port_props(usbser_port_t *); static void usbser_open_fini(usbser_port_t *); static int usbser_open_line_setup(usbser_port_t *, int, int); static int usbser_open_carrier_check(usbser_port_t *, int, int); static void usbser_open_queues_init(usbser_port_t *, queue_t *); static void usbser_open_queues_fini(usbser_port_t *); static void usbser_close_drain(usbser_port_t *); static void usbser_close_cancel_break(usbser_port_t *); static void usbser_close_hangup(usbser_port_t *); static void usbser_close_cleanup(usbser_port_t *); /* threads */ static void usbser_thr_dispatch(usbser_thread_t *); static void usbser_thr_cancel(usbser_thread_t *); static void usbser_thr_wake(usbser_thread_t *); static void usbser_wq_thread(void *); static void usbser_rq_thread(void *); /* DSD callbacks */ static void usbser_tx_cb(caddr_t); static void usbser_rx_cb(caddr_t); static void usbser_rx_massage_data(usbser_port_t *, mblk_t *); static void usbser_rx_massage_mbreak(usbser_port_t *, mblk_t *); static void usbser_rx_cb_put(usbser_port_t *, queue_t *, queue_t *, mblk_t *); static void usbser_status_cb(caddr_t); static void usbser_status_proc_cb(usbser_port_t *); /* serial support */ static void usbser_wmsg(usbser_port_t *); static int usbser_data(usbser_port_t *, mblk_t *); static int usbser_ioctl(usbser_port_t *, mblk_t *); static void usbser_iocdata(usbser_port_t *, mblk_t *); static void usbser_stop(usbser_port_t *, mblk_t *); static void usbser_start(usbser_port_t *, mblk_t *); static void usbser_stopi(usbser_port_t *, mblk_t *); static void usbser_starti(usbser_port_t *, mblk_t *); static void usbser_flush(usbser_port_t *, mblk_t *); static void usbser_break(usbser_port_t *, mblk_t *); static void usbser_delay(usbser_port_t *, mblk_t *); static void usbser_restart(void *); static int usbser_port_program(usbser_port_t *); static void usbser_inbound_flow_ctl(usbser_port_t *); /* misc */ static int usbser_dev_is_online(usbser_state_t *); static void usbser_serialize_port_act(usbser_port_t *, int); static void usbser_release_port_act(usbser_port_t *, int); static char *usbser_msgtype2str(int); static char *usbser_ioctl2str(int); /* USBA events */ usb_event_t usbser_usb_events = { usbser_disconnect_cb, /* disconnect */ usbser_reconnect_cb, /* reconnect */ NULL, /* pre-suspend */ NULL, /* pre-resume */ }; /* debug support */ uint_t usbser_errlevel = USB_LOG_L4; uint_t usbser_errmask = DPRINT_MASK_ALL; uint_t usbser_instance_debug = (uint_t)-1; /* usb serial console */ static struct usbser_state *usbser_list; static kmutex_t usbser_lock; static int usbser_console_abort; static usb_console_info_t console_input, console_output; static uchar_t *console_input_buf; static uchar_t *console_input_start, *console_input_end; _NOTE(SCHEME_PROTECTS_DATA("unshared", usbser_console_abort)) _NOTE(SCHEME_PROTECTS_DATA("unshared", console_input)) _NOTE(SCHEME_PROTECTS_DATA("unshared", console_output)) _NOTE(SCHEME_PROTECTS_DATA("unshared", console_input_start)) _NOTE(SCHEME_PROTECTS_DATA("unshared", console_input_end)) static void usbser_putchar(cons_polledio_arg_t, uchar_t); static int usbser_getchar(cons_polledio_arg_t); static boolean_t usbser_ischar(cons_polledio_arg_t); static void usbser_polledio_enter(cons_polledio_arg_t); static void usbser_polledio_exit(cons_polledio_arg_t); static int usbser_polledio_init(usbser_port_t *); static void usbser_polledio_fini(usbser_port_t *); static struct cons_polledio usbser_polledio = { CONSPOLLEDIO_V1, NULL, /* to be set later */ usbser_putchar, usbser_getchar, usbser_ischar, usbser_polledio_enter, usbser_polledio_exit }; /* various statistics. TODO: replace with kstats */ static int usbser_st_tx_data_loss = 0; static int usbser_st_rx_data_loss = 0; static int usbser_st_put_stopi = 0; static int usbser_st_mstop = 0; static int usbser_st_mstart = 0; static int usbser_st_mstopi = 0; static int usbser_st_mstarti = 0; static int usbser_st_rsrv = 0; _NOTE(SCHEME_PROTECTS_DATA("monotonic stats", usbser_st_{ tx_data_loss rx_data_loss put_stopi mstop mstart mstopi mstarti rsrv})) _NOTE(SCHEME_PROTECTS_DATA("unshared", usb_bulk_req_t)) _NOTE(SCHEME_PROTECTS_DATA("unshared", usb_intr_req_t)) /* taskq parameter */ extern pri_t minclsyspri; /* * tell warlock not to worry about STREAMS structures */ _NOTE(SCHEME_PROTECTS_DATA("unique per call", iocblk datab msgb queue copyreq)) /* * modload support */ extern struct mod_ops mod_miscops; static struct modlmisc modlmisc = { &mod_miscops, /* Type of module */ "USB generic serial module %I%" }; static struct modlinkage modlinkage = { MODREV_1, (void *)&modlmisc, NULL }; #define RSEQ(f1, f2) RSEQE(f1, usbser_rseq_do_cb, f2, NULL) /* * loadable module entry points * ---------------------------- */ int _init(void) { int err; mutex_init(&usbser_lock, NULL, MUTEX_DRIVER, (void *)NULL); if (err = mod_install(&modlinkage)) mutex_destroy(&usbser_lock); return (err); } int _fini(void) { int err; if (err = mod_remove(&modlinkage)) return (err); mutex_destroy(&usbser_lock); return (0); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } /* * soft state size */ int usbser_soft_state_size() { return (sizeof (usbser_state_t)); } /* * autoconfiguration entry points * ------------------------------ */ /*ARGSUSED*/ int usbser_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result, void *statep) { int instance; int ret = DDI_FAILURE; usbser_state_t *usbserp; instance = USBSER_MINOR2INST(getminor((dev_t)arg)); switch (infocmd) { case DDI_INFO_DEVT2DEVINFO: *result = NULL; usbserp = ddi_get_soft_state(statep, instance); if (usbserp != NULL) { *result = usbserp->us_dip; if (*result != NULL) { ret = DDI_SUCCESS; } } break; case DDI_INFO_DEVT2INSTANCE: *result = (void *)(uintptr_t)instance; ret = DDI_SUCCESS; break; default: break; } return (ret); } /* * device attach */ static rseq_t rseq_att[] = { RSEQ(NULL, usbser_free_soft_state), RSEQ(usbser_init_soft_state, usbser_fini_soft_state), RSEQ(usbser_attach_dev, usbser_detach_dev), RSEQ(usbser_attach_ports, usbser_detach_ports), RSEQ(usbser_create_taskq, usbser_destroy_taskq), RSEQ(NULL, usbser_set_dev_state_init) }; static void usbser_insert(struct usbser_state *usp) { struct usbser_state *tmp; mutex_enter(&usbser_lock); tmp = usbser_list; if (tmp == NULL) usbser_list = usp; else { while (tmp->us_next) tmp = tmp->us_next; tmp->us_next = usp; } mutex_exit(&usbser_lock); } static void usbser_remove(struct usbser_state *usp) { struct usbser_state *tmp, *prev = NULL; mutex_enter(&usbser_lock); tmp = usbser_list; while (tmp != usp) { prev = tmp; tmp = tmp->us_next; } ASSERT(tmp == usp); /* must exist, else attach/detach wrong */ if (prev) prev->us_next = usp->us_next; else usbser_list = usp->us_next; usp->us_next = NULL; mutex_exit(&usbser_lock); } /* * Return the first serial device, with dip held. This is called * from the console subsystem to place console on usb serial device. */ dev_info_t * usbser_first_device(void) { dev_info_t *dip = NULL; mutex_enter(&usbser_lock); if (usbser_list) { dip = usbser_list->us_dip; ndi_hold_devi(dip); } mutex_exit(&usbser_lock); return (dip); } int usbser_attach(dev_info_t *dip, ddi_attach_cmd_t cmd, void *statep, ds_ops_t *ds_ops) { int instance; usbser_state_t *usp; instance = ddi_get_instance(dip); switch (cmd) { case DDI_ATTACH: break; case DDI_RESUME: usbser_cpr_resume(dip); return (DDI_SUCCESS); default: return (DDI_FAILURE); } /* allocate and get soft state */ if (ddi_soft_state_zalloc(statep, instance) != DDI_SUCCESS) { return (DDI_FAILURE); } if ((usp = ddi_get_soft_state(statep, instance)) == NULL) { ddi_soft_state_free(statep, instance); return (DDI_FAILURE); } usp->us_statep = statep; usp->us_dip = dip; usp->us_instance = instance; usp->us_ds_ops = ds_ops; if (rseq_do(rseq_att, NELEM(rseq_att), (uintptr_t)usp, 0) == RSEQ_OK) { ddi_report_dev(dip); usbser_insert(usp); return (DDI_SUCCESS); } else { return (DDI_FAILURE); } } /* * device detach */ int usbser_detach(dev_info_t *dip, ddi_detach_cmd_t cmd, void *statep) { int instance = ddi_get_instance(dip); usbser_state_t *usp; int rval; usp = ddi_get_soft_state(statep, instance); switch (cmd) { case DDI_DETACH: USB_DPRINTF_L4(DPRINT_DETACH, usp->us_lh, "usbser_detach"); usbser_remove(usp); (void) rseq_undo(rseq_att, NELEM(rseq_att), (uintptr_t)usp, 0); USB_DPRINTF_L4(DPRINT_DETACH, NULL, "usbser_detach.%d: end", instance); return (DDI_SUCCESS); case DDI_SUSPEND: rval = usbser_cpr_suspend(dip); return ((rval == USB_SUCCESS)? DDI_SUCCESS : DDI_FAILURE); default: return (DDI_FAILURE); } } /* * STREAMS entry points * -------------------- * * * port open */ /*ARGSUSED*/ int usbser_open(queue_t *rq, dev_t *dev, int flag, int sflag, cred_t *cr, void *statep) { usbser_state_t *usp; usbser_port_t *pp; int minor = getminor(*dev); int instance; uint_t port_num; int rval; instance = USBSER_MINOR2INST(minor); if (instance < 0) { return (ENXIO); } usp = ddi_get_soft_state(statep, instance); if (usp == NULL) { return (ENXIO); } /* don't allow to open disconnected device */ mutex_enter(&usp->us_mutex); if (usp->us_dev_state == USB_DEV_DISCONNECTED) { mutex_exit(&usp->us_mutex); return (ENXIO); } mutex_exit(&usp->us_mutex); /* get port soft state */ port_num = USBSER_MINOR2PORT(minor); if (port_num >= usp->us_port_cnt) { return (ENXIO); } pp = &usp->us_ports[port_num]; /* set up everything for open */ rval = usbser_open_setup(rq, pp, minor, flag, cr); USB_DPRINTF_L4(DPRINT_OPEN, pp->port_lh, "usbser_open: rval=%d", rval); return (rval); } /* * port close * * some things driver should do when the last app closes the line: * * drain data; * cancel break/delay; * hangup line (if necessary); * DSD close; * cleanup soft state; */ /*ARGSUSED*/ int usbser_close(queue_t *rq, int flag, cred_t *cr) { usbser_port_t *pp = (usbser_port_t *)rq->q_ptr; int online; if (pp == NULL) { return (ENXIO); } online = usbser_dev_is_online(pp->port_usp); /* * in the closing state new activities will not be initiated */ mutex_enter(&pp->port_mutex); pp->port_state = USBSER_PORT_CLOSING; if (online) { /* drain the data */ usbser_close_drain(pp); } /* stop break/delay */ usbser_close_cancel_break(pp); if (online) { /* hangup line */ usbser_close_hangup(pp); } /* * close DSD, cleanup state and transition to 'closed' state */ usbser_close_cleanup(pp); mutex_exit(&pp->port_mutex); USB_DPRINTF_L4(DPRINT_CLOSE, pp->port_lh, "usbser_close: end"); return (0); } /* * read side service routine: send as much as possible messages upstream * and if there is still place on the queue, enable receive (if not already) */ int usbser_rsrv(queue_t *q) { usbser_port_t *pp = (usbser_port_t *)q->q_ptr; mblk_t *mp; usbser_st_rsrv++; USB_DPRINTF_L4(DPRINT_RQ, pp->port_lh, "usbser_rsrv"); while (canputnext(q) && (mp = getq(q))) { putnext(q, mp); } if (canputnext(q)) { mutex_enter(&pp->port_mutex); ASSERT(pp->port_state != USBSER_PORT_CLOSED); if (USBSER_PORT_ACCESS_OK(pp)) { usbser_thr_wake(&pp->port_rq_thread); } mutex_exit(&pp->port_mutex); } return (0); } /* * wput: put message on the queue and wake wq thread */ int usbser_wput(queue_t *q, mblk_t *mp) { usbser_port_t *pp = (usbser_port_t *)q->q_ptr; USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wput"); mutex_enter(&pp->port_mutex); ASSERT(pp->port_state != USBSER_PORT_CLOSED); /* ignore new messages if port is already closing */ if (pp->port_state == USBSER_PORT_CLOSING) { freemsg(mp); } else if (putq(q, mp)) { /* * this counter represents amount of tx data on the wq. * each time the data is passed to DSD for transmission, * the counter is decremented accordingly */ pp->port_wq_data_cnt += msgdsize(mp); } else { usbser_st_tx_data_loss++; } mutex_exit(&pp->port_mutex); return (0); } /* * we need wsrv() routine to take advantage of STREAMS flow control: * without it the framework will consider we are always able to process msgs */ int usbser_wsrv(queue_t *q) { usbser_port_t *pp = (usbser_port_t *)q->q_ptr; USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wsrv"); mutex_enter(&pp->port_mutex); ASSERT(pp->port_state != USBSER_PORT_CLOSED); if (USBSER_PORT_ACCESS_OK(pp)) { usbser_thr_wake(&pp->port_wq_thread); } mutex_exit(&pp->port_mutex); return (0); } /* * power entry point */ int usbser_power(dev_info_t *dip, int comp, int level) { void *statep; usbser_state_t *usp; int new_state; int rval; statep = ddi_get_driver_private(dip); usp = ddi_get_soft_state(statep, ddi_get_instance(dip)); USB_DPRINTF_L3(DPRINT_EVENTS, usp->us_lh, "usbser_power: dip=0x%p, comp=%d, level=%d", dip, comp, level); mutex_enter(&usp->us_mutex); new_state = usp->us_dev_state; mutex_exit(&usp->us_mutex); /* let DSD do the job */ rval = USBSER_DS_USB_POWER(usp, comp, level, &new_state); /* stay in sync with DSD */ mutex_enter(&usp->us_mutex); usp->us_dev_state = new_state; mutex_exit(&usp->us_mutex); return ((rval == USB_SUCCESS) ? DDI_SUCCESS : DDI_FAILURE); } /* * * configuration entry point subroutines * ------------------------------------- * * rseq callback */ static int usbser_rseq_do_cb(rseq_t *rseq, int num, uintptr_t arg) { usbser_state_t *usp = (usbser_state_t *)arg; int rval = rseq[num].r_do.s_rval; char *name = rseq[num].r_do.s_name; if (rval != DDI_SUCCESS) { USB_DPRINTF_L2(DPRINT_ATTACH, usp->us_lh, "do %s failed (%d)", name, rval); return (RSEQ_UNDO); } else { return (RSEQ_OK); } } /* * free soft state */ static int usbser_free_soft_state(usbser_state_t *usp) { ddi_soft_state_free(usp->us_statep, usp->us_instance); return (USB_SUCCESS); } /* * init instance soft state */ static int usbser_init_soft_state(usbser_state_t *usp) { usp->us_lh = usb_alloc_log_hdl(usp->us_dip, "usbs[*].", &usbser_errlevel, &usbser_errmask, &usbser_instance_debug, 0); mutex_init(&usp->us_mutex, NULL, MUTEX_DRIVER, (void *)NULL); /* save state pointer for use in event callbacks */ ddi_set_driver_private(usp->us_dip, usp->us_statep); usp->us_dev_state = USBSER_DEV_INIT; return (DDI_SUCCESS); } /* * fini instance soft state */ static int usbser_fini_soft_state(usbser_state_t *usp) { usb_free_log_hdl(usp->us_lh); mutex_destroy(&usp->us_mutex); ddi_set_driver_private(usp->us_dip, NULL); return (DDI_SUCCESS); } /* * attach entire device */ static int usbser_attach_dev(usbser_state_t *usp) { ds_attach_info_t ai; int rval; usp->us_dev_state = USB_DEV_ONLINE; ai.ai_dip = usp->us_dip; ai.ai_usb_events = &usbser_usb_events; ai.ai_hdl = &usp->us_ds_hdl; ai.ai_port_cnt = &usp->us_port_cnt; rval = USBSER_DS_ATTACH(usp, &ai); if ((rval != USB_SUCCESS) || (usp->us_ds_hdl == NULL) || (usp->us_port_cnt == 0)) { USB_DPRINTF_L4(DPRINT_ATTACH, usp->us_lh, "usbser_attach_dev: " "failed %d %p %d", rval, usp->us_ds_hdl, usp->us_port_cnt); return (DDI_FAILURE); } USB_DPRINTF_L4(DPRINT_ATTACH, usp->us_lh, "usbser_attach_dev: port_cnt = %d", usp->us_port_cnt); return (DDI_SUCCESS); } /* * detach entire device */ static void usbser_detach_dev(usbser_state_t *usp) { USBSER_DS_DETACH(usp); } /* * attach each individual port */ static int usbser_attach_ports(usbser_state_t *usp) { int i; usbser_port_t *pp; ds_cb_t ds_cb; /* * allocate port array */ usp->us_ports = kmem_zalloc(usp->us_port_cnt * sizeof (usbser_port_t), KM_SLEEP); /* callback handlers */ ds_cb.cb_tx = usbser_tx_cb; ds_cb.cb_rx = usbser_rx_cb; ds_cb.cb_status = usbser_status_cb; /* * initialize each port */ for (i = 0; i < usp->us_port_cnt; i++) { pp = &usp->us_ports[i]; /* * initialize data */ pp->port_num = i; pp->port_usp = usp; pp->port_ds_ops = usp->us_ds_ops; pp->port_ds_hdl = usp->us_ds_hdl; /* allocate log handle */ (void) sprintf(pp->port_lh_name, "usbs[%d].", i); pp->port_lh = usb_alloc_log_hdl(usp->us_dip, pp->port_lh_name, &usbser_errlevel, &usbser_errmask, &usbser_instance_debug, 0); mutex_init(&pp->port_mutex, NULL, MUTEX_DRIVER, (void *)NULL); cv_init(&pp->port_state_cv, NULL, CV_DEFAULT, NULL); cv_init(&pp->port_act_cv, NULL, CV_DEFAULT, NULL); cv_init(&pp->port_car_cv, NULL, CV_DEFAULT, NULL); /* * init threads */ pp->port_wq_thread.thr_port = pp; pp->port_wq_thread.thr_func = usbser_wq_thread; pp->port_wq_thread.thr_arg = (void *)&pp->port_wq_thread; cv_init(&pp->port_wq_thread.thr_cv, NULL, CV_DEFAULT, NULL); pp->port_rq_thread.thr_port = pp; pp->port_rq_thread.thr_func = usbser_rq_thread; pp->port_rq_thread.thr_arg = (void *)&pp->port_rq_thread; cv_init(&pp->port_rq_thread.thr_cv, NULL, CV_DEFAULT, NULL); /* * register callbacks */ ds_cb.cb_arg = (caddr_t)pp; USBSER_DS_REGISTER_CB(usp, i, &ds_cb); pp->port_state = USBSER_PORT_CLOSED; if (usbser_create_port_minor_nodes(usp, i) != USB_SUCCESS) { usbser_detach_ports(usp); return (DDI_FAILURE); } } return (DDI_SUCCESS); } /* * create a pair of minor nodes for the port */ static int usbser_create_port_minor_nodes(usbser_state_t *usp, int port_num) { int instance = usp->us_instance; minor_t minor; char name[16]; /* * tty node */ (void) sprintf(name, "%d", port_num); minor = USBSER_MAKEMINOR(instance, port_num, 0); if (ddi_create_minor_node(usp->us_dip, name, S_IFCHR, minor, DDI_NT_SERIAL, NULL) != DDI_SUCCESS) { return (USB_FAILURE); } /* * dial-out node */ (void) sprintf(name, "%d,cu", port_num); minor = USBSER_MAKEMINOR(instance, port_num, OUTLINE); if (ddi_create_minor_node(usp->us_dip, name, S_IFCHR, minor, DDI_NT_SERIAL_DO, NULL) != DDI_SUCCESS) { return (USB_FAILURE); } return (USB_SUCCESS); } /* * detach each port individually */ static void usbser_detach_ports(usbser_state_t *usp) { int i; int sz; usbser_port_t *pp; /* * remove all minor nodes */ ddi_remove_minor_node(usp->us_dip, NULL); for (i = 0; i < usp->us_port_cnt; i++) { pp = &usp->us_ports[i]; if (pp->port_state != USBSER_PORT_CLOSED) { ASSERT(pp->port_state == USBSER_PORT_NOT_INIT); continue; } USBSER_DS_UNREGISTER_CB(usp, i); mutex_destroy(&pp->port_mutex); cv_destroy(&pp->port_state_cv); cv_destroy(&pp->port_act_cv); cv_destroy(&pp->port_car_cv); cv_destroy(&pp->port_wq_thread.thr_cv); cv_destroy(&pp->port_rq_thread.thr_cv); usb_free_log_hdl(pp->port_lh); } /* * free memory */ sz = usp->us_port_cnt * sizeof (usbser_port_t); kmem_free(usp->us_ports, sz); usp->us_ports = NULL; } /* * create a taskq with two threads per port (read and write sides) */ static int usbser_create_taskq(usbser_state_t *usp) { int nthr = usp->us_port_cnt * 2; usp->us_taskq = ddi_taskq_create(usp->us_dip, "usbser_taskq", nthr, TASKQ_DEFAULTPRI, 0); return ((usp->us_taskq == NULL) ? DDI_FAILURE : DDI_SUCCESS); } static void usbser_destroy_taskq(usbser_state_t *usp) { ddi_taskq_destroy(usp->us_taskq); } static void usbser_set_dev_state_init(usbser_state_t *usp) { mutex_enter(&usp->us_mutex); usp->us_dev_state = USBSER_DEV_INIT; mutex_exit(&usp->us_mutex); } /* * hotplugging and power management * --------------------------------- * * disconnect event callback */ /*ARGSUSED*/ static int usbser_disconnect_cb(dev_info_t *dip) { void *statep; usbser_state_t *usp; statep = ddi_get_driver_private(dip); usp = ddi_get_soft_state(statep, ddi_get_instance(dip)); USB_DPRINTF_L3(DPRINT_EVENTS, usp->us_lh, "usbser_disconnect_cb: dip=%p", dip); mutex_enter(&usp->us_mutex); /* safety check in case we're called before attach is complete */ if (usp->us_dev_state != USB_DEV_ONLINE) { mutex_exit(&usp->us_mutex); return (USB_SUCCESS); } /* prevent further activity */ usp->us_dev_state = USB_DEV_DISCONNECTED; mutex_exit(&usp->us_mutex); /* see if any of the ports are open and do necessary handling */ usbser_disconnect_ports(usp); /* call DSD to do any necessary work */ if (USBSER_DS_DISCONNECT(usp) != USB_DEV_DISCONNECTED) { USB_DPRINTF_L2(DPRINT_EVENTS, usp->us_lh, "usbser_disconnect_cb: ds_disconnect failed"); } return (USB_SUCCESS); } /* * reconnect event callback */ /*ARGSUSED*/ static int usbser_reconnect_cb(dev_info_t *dip) { void *statep; usbser_state_t *usp; statep = ddi_get_driver_private(dip); usp = ddi_get_soft_state(statep, ddi_get_instance(dip)); USB_DPRINTF_L3(DPRINT_EVENTS, usp->us_lh, "usbser_reconnect_cb: dip=%p", dip); (void) usbser_restore_device_state(usp); return (USB_SUCCESS); } /* * if any of the ports is open during disconnect, * send M_HANGUP message upstream and log a warning */ static void usbser_disconnect_ports(usbser_state_t *usp) { usbser_port_t *pp; queue_t *rq; int complain = 0; int hangup = 0; timeout_id_t delay_id = 0; int i; if (usp->us_ports == NULL) { return; } for (i = 0; i < usp->us_port_cnt; i++) { pp = &usp->us_ports[i]; mutex_enter(&pp->port_mutex); if (pp->port_state == USBSER_PORT_OPEN || USBSER_IS_OPENING(pp) || pp->port_state == USBSER_PORT_CLOSING) { complain = 1; } if (pp->port_state == USBSER_PORT_OPEN) { rq = pp->port_ttycommon.t_readq; /* * hangup the stream; will send actual * M_HANGUP message after releasing mutex */ pp->port_flags |= USBSER_FL_HUNGUP; hangup = 1; /* * cancel all activities */ usbser_release_port_act(pp, USBSER_ACT_ALL); delay_id = pp->port_delay_id; pp->port_delay_id = 0; /* mark disconnected */ pp->port_state = USBSER_PORT_DISCONNECTED; cv_broadcast(&pp->port_state_cv); } mutex_exit(&pp->port_mutex); if (hangup) { (void) putnextctl(rq, M_HANGUP); hangup = 0; } /* * we couldn't untimeout while holding the mutex - do it now */ if (delay_id) { (void) untimeout(delay_id); delay_id = 0; } } /* * complain about disconnecting device while open */ if (complain) { USB_DPRINTF_L0(DPRINT_EVENTS, usp->us_lh, "device was " "disconnected while open. Data may have been lost"); } } /* * do CPR suspend * * We use a trivial CPR strategy - fail if any of the device's ports are open. * The problem with more sophisticated strategies is that each open port uses * two threads that sit in the loop until the port is closed, while CPR has to * stop all kernel threads to succeed. Stopping port threads is a rather * intrusive and delicate procedure; I leave it as an RFE for now. * */ static int usbser_cpr_suspend(dev_info_t *dip) { void *statep; usbser_state_t *usp; int new_state; int rval; statep = ddi_get_driver_private(dip); usp = ddi_get_soft_state(statep, ddi_get_instance(dip)); USB_DPRINTF_L4(DPRINT_EVENTS, usp->us_lh, "usbser_cpr_suspend"); /* suspend each port first */ if (usbser_suspend_ports(usp) != USB_SUCCESS) { USB_DPRINTF_L3(DPRINT_EVENTS, usp->us_lh, "usbser_cpr_suspend: GSD failure"); return (USB_FAILURE); } new_state = USBSER_DS_SUSPEND(usp); /* let DSD do its part */ mutex_enter(&usp->us_mutex); if (new_state == USB_DEV_SUSPENDED) { rval = USB_SUCCESS; } else { ASSERT(new_state == USB_DEV_ONLINE); rval = USB_FAILURE; } usp->us_dev_state = new_state; mutex_exit(&usp->us_mutex); return (rval); } static int usbser_suspend_ports(usbser_state_t *usp) { usbser_port_t *pp; int i; for (i = 0; i < usp->us_port_cnt; i++) { pp = &usp->us_ports[i]; mutex_enter(&pp->port_mutex); if (pp->port_state != USBSER_PORT_CLOSED) { mutex_exit(&pp->port_mutex); return (USB_FAILURE); } mutex_exit(&pp->port_mutex); } return (USB_SUCCESS); } /* * do CPR resume * * DSD will return USB_DEV_ONLINE in case of success */ static void usbser_cpr_resume(dev_info_t *dip) { void *statep; usbser_state_t *usp; statep = ddi_get_driver_private(dip); usp = ddi_get_soft_state(statep, ddi_get_instance(dip)); USB_DPRINTF_L3(DPRINT_EVENTS, usp->us_lh, "usbser_cpr_resume"); (void) usbser_restore_device_state(usp); } /* * restore device state after CPR resume or reconnect */ static int usbser_restore_device_state(usbser_state_t *usp) { int new_state, current_state; mutex_enter(&usp->us_mutex); current_state = usp->us_dev_state; mutex_exit(&usp->us_mutex); ASSERT((current_state == USB_DEV_DISCONNECTED) || (current_state == USB_DEV_SUSPENDED)); /* * call DSD to perform device-specific work */ if (current_state == USB_DEV_DISCONNECTED) { new_state = USBSER_DS_RECONNECT(usp); } else { new_state = USBSER_DS_RESUME(usp); } mutex_enter(&usp->us_mutex); usp->us_dev_state = new_state; mutex_exit(&usp->us_mutex); if (new_state == USB_DEV_ONLINE) { /* * restore ports state */ usbser_restore_ports_state(usp); } return (USB_SUCCESS); } /* * restore ports state after device reconnect/resume */ static void usbser_restore_ports_state(usbser_state_t *usp) { usbser_port_t *pp; queue_t *rq; int i; for (i = 0; i < usp->us_port_cnt; i++) { pp = &usp->us_ports[i]; mutex_enter(&pp->port_mutex); /* * only care about ports that are open */ if ((pp->port_state != USBSER_PORT_SUSPENDED) && (pp->port_state != USBSER_PORT_DISCONNECTED)) { mutex_exit(&pp->port_mutex); continue; } pp->port_state = USBSER_PORT_OPEN; /* * if the stream was hung up during disconnect, restore it */ if (pp->port_flags & USBSER_FL_HUNGUP) { pp->port_flags &= ~USBSER_FL_HUNGUP; rq = pp->port_ttycommon.t_readq; mutex_exit(&pp->port_mutex); (void) putnextctl(rq, M_UNHANGUP); mutex_enter(&pp->port_mutex); } /* * restore serial parameters */ (void) usbser_port_program(pp); /* * wake anything that might be sleeping */ cv_broadcast(&pp->port_state_cv); cv_broadcast(&pp->port_act_cv); usbser_thr_wake(&pp->port_wq_thread); usbser_thr_wake(&pp->port_rq_thread); mutex_exit(&pp->port_mutex); } } /* * STREAMS subroutines * ------------------- * * * port open state machine * * here's a list of things that the driver has to do while open; * because device can be opened any number of times, * initial open has additional responsibilities: * * if (initial_open) { * initialize soft state; \ * DSD open; - see usbser_open_init() * dispatch threads; / * } * raise DTR; * wait for carrier (if necessary); * * we should also take into consideration that two threads can try to open * the same physical port simultaneously (/dev/term/N and /dev/cua/N). * * return values: * 0 - success; * >0 - fail with this error code; */ static int usbser_open_setup(queue_t *rq, usbser_port_t *pp, int minor, int flag, cred_t *cr) { int rval = USBSER_CONTINUE; mutex_enter(&pp->port_mutex); /* * refer to port state diagram in the header file */ loop: switch (pp->port_state) { case USBSER_PORT_CLOSED: /* * initial open */ rval = usbser_open_init(pp, minor); break; case USBSER_PORT_OPENING_TTY: /* * dial-out thread can overtake the port * if tty open thread is sleeping waiting for carrier */ if ((minor & OUTLINE) && (pp->port_flags & USBSER_FL_WOPEN)) { pp->port_state = USBSER_PORT_OPENING_OUT; USB_DPRINTF_L3(DPRINT_OPEN, pp->port_lh, "usbser_open_state: overtake"); } /* FALLTHRU */ case USBSER_PORT_OPENING_OUT: /* * if no other open in progress, setup the line */ if (USBSER_NO_OTHER_OPEN(pp, minor)) { rval = usbser_open_line_setup(pp, minor, flag); break; } /* FALLTHRU */ case USBSER_PORT_CLOSING: /* * wait until close active phase ends */ if (cv_wait_sig(&pp->port_state_cv, &pp->port_mutex) == 0) { rval = EINTR; } break; case USBSER_PORT_OPEN: if ((pp->port_ttycommon.t_flags & TS_XCLUDE) && secpolicy_excl_open(cr) != 0) { /* * exclusive use */ rval = EBUSY; } else if (USBSER_OPEN_IN_OTHER_MODE(pp, minor)) { /* * tty and dial-out modes are mutually exclusive */ rval = EBUSY; } else { /* * port is being re-open in the same mode */ rval = usbser_open_line_setup(pp, minor, flag); } break; default: rval = ENXIO; break; } if (rval == USBSER_CONTINUE) { goto loop; } /* * initial open requires additional handling */ if (USBSER_IS_OPENING(pp)) { if (rval == USBSER_COMPLETE) { if (pp->port_state == USBSER_PORT_OPENING_OUT) { pp->port_flags |= USBSER_FL_OUT; } pp->port_state = USBSER_PORT_OPEN; cv_broadcast(&pp->port_state_cv); usbser_open_queues_init(pp, rq); } else { usbser_open_fini(pp); } } mutex_exit(&pp->port_mutex); return (rval); } /* * initialize the port when opened for the first time */ static int usbser_open_init(usbser_port_t *pp, int minor) { usbser_state_t *usp = pp->port_usp; tty_common_t *tp = &pp->port_ttycommon; int rval = ENXIO; ASSERT(pp->port_state == USBSER_PORT_CLOSED); /* * init state */ pp->port_act = 0; pp->port_flags &= USBSER_FL_PRESERVE; pp->port_flowc = '\0'; pp->port_wq_data_cnt = 0; if (minor & OUTLINE) { pp->port_state = USBSER_PORT_OPENING_OUT; } else { pp->port_state = USBSER_PORT_OPENING_TTY; } /* * init termios settings */ tp->t_iflag = 0; tp->t_iocpending = NULL; tp->t_size.ws_row = tp->t_size.ws_col = 0; tp->t_size.ws_xpixel = tp->t_size.ws_ypixel = 0; tp->t_startc = CSTART; tp->t_stopc = CSTOP; usbser_check_port_props(pp); /* * dispatch wq and rq threads: * although queues are not enabled at this point, * we will need wq to run status processing callback */ usbser_thr_dispatch(&pp->port_wq_thread); usbser_thr_dispatch(&pp->port_rq_thread); /* * open DSD port */ mutex_exit(&pp->port_mutex); rval = USBSER_DS_OPEN_PORT(usp, pp->port_num); mutex_enter(&pp->port_mutex); if (rval != USB_SUCCESS) { return (ENXIO); } pp->port_flags |= USBSER_FL_DSD_OPEN; /* * program port with default parameters */ if ((rval = usbser_port_program(pp)) != 0) { return (ENXIO); } return (USBSER_CONTINUE); } /* * create a pair of minor nodes for the port */ static void usbser_check_port_props(usbser_port_t *pp) { dev_info_t *dip = pp->port_usp->us_dip; tty_common_t *tp = &pp->port_ttycommon; struct termios *termiosp; uint_t len; char name[20]; /* * take default modes from "ttymodes" property if it exists */ if (ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, ddi_root_node(), 0, "ttymodes", (uchar_t **)&termiosp, &len) == DDI_PROP_SUCCESS) { if (len == sizeof (struct termios)) { tp->t_cflag = termiosp->c_cflag; if (termiosp->c_iflag & (IXON | IXANY)) { tp->t_iflag = termiosp->c_iflag & (IXON | IXANY); tp->t_startc = termiosp->c_cc[VSTART]; tp->t_stopc = termiosp->c_cc[VSTOP]; } } ddi_prop_free(termiosp); } /* * look for "ignore-cd" or "port-N-ignore-cd" property */ (void) sprintf(name, "port-%d-ignore-cd", pp->port_num); if (ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "ignore-cd", 0) || ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, name, 0)) { pp->port_flags |= USBSER_FL_IGNORE_CD; } else { pp->port_flags &= ~USBSER_FL_IGNORE_CD; } } /* * undo what was done in usbser_open_init() */ static void usbser_open_fini(usbser_port_t *pp) { uint_t port_num = pp->port_num; usbser_state_t *usp = pp->port_usp; /* * close DSD if it is open */ if (pp->port_flags & USBSER_FL_DSD_OPEN) { mutex_exit(&pp->port_mutex); if (USBSER_DS_CLOSE_PORT(usp, port_num) != USB_SUCCESS) { USB_DPRINTF_L2(DPRINT_CLOSE, pp->port_lh, "usbser_open_fini: CLOSE_PORT fail"); } mutex_enter(&pp->port_mutex); } /* * cancel threads */ usbser_thr_cancel(&pp->port_wq_thread); usbser_thr_cancel(&pp->port_rq_thread); /* * unpdate soft state */ pp->port_state = USBSER_PORT_CLOSED; cv_broadcast(&pp->port_state_cv); cv_broadcast(&pp->port_car_cv); } /* * setup serial line */ static int usbser_open_line_setup(usbser_port_t *pp, int minor, int flag) { int rval; mutex_exit(&pp->port_mutex); /* * prevent opening a disconnected device */ if (!usbser_dev_is_online(pp->port_usp)) { mutex_enter(&pp->port_mutex); return (ENXIO); } /* raise DTR on every open */ (void) USBSER_DS_SET_MODEM_CTL(pp, TIOCM_DTR, TIOCM_DTR); mutex_enter(&pp->port_mutex); /* * check carrier */ rval = usbser_open_carrier_check(pp, minor, flag); return (rval); } /* * check carrier and wait if needed */ static int usbser_open_carrier_check(usbser_port_t *pp, int minor, int flag) { tty_common_t *tp = &pp->port_ttycommon; int val = 0; int rval; if (pp->port_flags & USBSER_FL_IGNORE_CD) { tp->t_flags |= TS_SOFTCAR; } /* * check carrier */ if (tp->t_flags & TS_SOFTCAR) { pp->port_flags |= USBSER_FL_CARR_ON; } else if (USBSER_DS_GET_MODEM_CTL(pp, TIOCM_CD, &val) != USB_SUCCESS) { return (ENXIO); } else if (val & TIOCM_CD) { pp->port_flags |= USBSER_FL_CARR_ON; } else { pp->port_flags &= ~USBSER_FL_CARR_ON; } /* * don't block if 1) not allowed to, 2) this is a local device, * 3) opening in dial-out mode, or 4) carrier is already on */ if ((flag & (FNDELAY | FNONBLOCK)) || (tp->t_cflag & CLOCAL) || (minor & OUTLINE) || (pp->port_flags & USBSER_FL_CARR_ON)) { return (USBSER_COMPLETE); } /* * block until carrier up (only in tty mode) */ USB_DPRINTF_L4(DPRINT_OPEN, pp->port_lh, "usbser_open_carrier_check: waiting for carrier..."); pp->port_flags |= USBSER_FL_WOPEN; rval = cv_wait_sig(&pp->port_car_cv, &pp->port_mutex); pp->port_flags &= ~USBSER_FL_WOPEN; if (rval == 0) { /* * interrupted with a signal */ return (EINTR); } else { /* * try again */ return (USBSER_CONTINUE); } } /* * during open, setup queues and message processing */ static void usbser_open_queues_init(usbser_port_t *pp, queue_t *rq) { pp->port_ttycommon.t_readq = rq; pp->port_ttycommon.t_writeq = WR(rq); rq->q_ptr = WR(rq)->q_ptr = (caddr_t)pp; qprocson(rq); } /* * clean up queues and message processing */ static void usbser_open_queues_fini(usbser_port_t *pp) { queue_t *rq = pp->port_ttycommon.t_readq; mutex_exit(&pp->port_mutex); /* * clean up queues */ qprocsoff(rq); /* * free unused messages */ flushq(rq, FLUSHALL); flushq(WR(rq), FLUSHALL); rq->q_ptr = WR(rq)->q_ptr = NULL; ttycommon_close(&pp->port_ttycommon); mutex_enter(&pp->port_mutex); } /* * during close, wait until pending data is gone or the signal is sent */ static void usbser_close_drain(usbser_port_t *pp) { int need_drain; clock_t until; int rval; /* * port_wq_data_cnt indicates amount of data on the write queue, * which becomes zero when all data is submitted to DSD. But usbser * stays busy until it gets tx callback from DSD, signalling that * data has been sent over USB. To be continued in the next comment... */ until = ddi_get_lbolt() + drv_usectohz(USBSER_WQ_DRAIN_TIMEOUT * 1000000); while ((pp->port_wq_data_cnt > 0) && USBSER_PORT_IS_BUSY(pp)) { if ((rval = cv_timedwait_sig(&pp->port_act_cv, &pp->port_mutex, until)) <= 0) { break; } } /* don't drain if timed out or received a signal */ need_drain = (pp->port_wq_data_cnt == 0) || !USBSER_PORT_IS_BUSY(pp) || (rval != 0); mutex_exit(&pp->port_mutex); /* * Once the data reaches USB serial box, it may still be stored in its * internal output buffer (FIFO). We call DSD drain to ensure that all * the data is transmitted transmitted over the serial line. */ if (need_drain) { rval = USBSER_DS_FIFO_DRAIN(pp, USBSER_TX_FIFO_DRAIN_TIMEOUT); if (rval != USB_SUCCESS) { (void) USBSER_DS_FIFO_FLUSH(pp, DS_TX); } } else { (void) USBSER_DS_FIFO_FLUSH(pp, DS_TX); } mutex_enter(&pp->port_mutex); } /* * during close, cancel break/delay */ static void usbser_close_cancel_break(usbser_port_t *pp) { timeout_id_t delay_id; if (pp->port_act & USBSER_ACT_BREAK) { delay_id = pp->port_delay_id; pp->port_delay_id = 0; mutex_exit(&pp->port_mutex); (void) untimeout(delay_id); (void) USBSER_DS_BREAK_CTL(pp, DS_OFF); mutex_enter(&pp->port_mutex); pp->port_act &= ~USBSER_ACT_BREAK; } } /* * during close, drop RTS/DTR if necessary */ static void usbser_close_hangup(usbser_port_t *pp) { /* * drop DTR and RTS if HUPCL is set */ if (pp->port_ttycommon.t_cflag & HUPCL) { mutex_exit(&pp->port_mutex); (void) USBSER_DS_SET_MODEM_CTL(pp, TIOCM_RTS | TIOCM_DTR, 0); mutex_enter(&pp->port_mutex); } } /* * state cleanup during close */ static void usbser_close_cleanup(usbser_port_t *pp) { usbser_open_queues_fini(pp); usbser_open_fini(pp); } /* * * thread management * ----------------- * * * dispatch a thread */ static void usbser_thr_dispatch(usbser_thread_t *thr) { usbser_port_t *pp = thr->thr_port; usbser_state_t *usp = pp->port_usp; int rval; ASSERT(mutex_owned(&pp->port_mutex)); ASSERT((thr->thr_flags & USBSER_THR_RUNNING) == 0); thr->thr_flags = USBSER_THR_RUNNING; rval = ddi_taskq_dispatch(usp->us_taskq, thr->thr_func, thr->thr_arg, DDI_SLEEP); ASSERT(rval == DDI_SUCCESS); } /* * cancel a thread */ static void usbser_thr_cancel(usbser_thread_t *thr) { usbser_port_t *pp = thr->thr_port; ASSERT(mutex_owned(&pp->port_mutex)); thr->thr_flags &= ~USBSER_THR_RUNNING; cv_signal(&thr->thr_cv); /* wait until the thread actually exits */ do { cv_wait(&thr->thr_cv, &pp->port_mutex); } while ((thr->thr_flags & USBSER_THR_EXITED) == 0); } /* * wake thread */ static void usbser_thr_wake(usbser_thread_t *thr) { usbser_port_t *pp = thr->thr_port; ASSERT(mutex_owned(&pp->port_mutex)); thr->thr_flags |= USBSER_THR_WAKE; cv_signal(&thr->thr_cv); } /* * thread handling write queue requests */ static void usbser_wq_thread(void *arg) { usbser_thread_t *thr = (usbser_thread_t *)arg; usbser_port_t *pp = thr->thr_port; USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wq_thread: enter"); mutex_enter(&pp->port_mutex); while (thr->thr_flags & USBSER_THR_RUNNING) { /* * when woken, see what we should do */ if (thr->thr_flags & USBSER_THR_WAKE) { thr->thr_flags &= ~USBSER_THR_WAKE; /* * status callback pending? */ if (pp->port_flags & USBSER_FL_STATUS_CB) { usbser_status_proc_cb(pp); } usbser_wmsg(pp); } else { /* * sleep until woken up to do some work, e.g: * - new message arrives; * - data transmit completes; * - status callback pending; * - wq thread is cancelled; */ cv_wait(&thr->thr_cv, &pp->port_mutex); USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wq_thread: wakeup"); } } thr->thr_flags |= USBSER_THR_EXITED; cv_signal(&thr->thr_cv); USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wq_thread: exit"); mutex_exit(&pp->port_mutex); } /* * thread handling read queue requests */ static void usbser_rq_thread(void *arg) { usbser_thread_t *thr = (usbser_thread_t *)arg; usbser_port_t *pp = thr->thr_port; USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_rq_thread: enter"); mutex_enter(&pp->port_mutex); while (thr->thr_flags & USBSER_THR_RUNNING) { /* * read service routine will wake us when * more space is available on the read queue */ if (thr->thr_flags & USBSER_THR_WAKE) { thr->thr_flags &= ~USBSER_THR_WAKE; /* * don't process messages until queue is enabled */ if (!pp->port_ttycommon.t_readq) { continue; } /* * check whether we need to resume receive */ if (pp->port_flags & USBSER_FL_RX_STOPPED) { pp->port_flowc = pp->port_ttycommon.t_startc; usbser_inbound_flow_ctl(pp); } /* * grab more data if available */ mutex_exit(&pp->port_mutex); usbser_rx_cb((caddr_t)pp); mutex_enter(&pp->port_mutex); } else { cv_wait(&thr->thr_cv, &pp->port_mutex); USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_rq_thread: wakeup"); } } thr->thr_flags |= USBSER_THR_EXITED; cv_signal(&thr->thr_cv); USB_DPRINTF_L4(DPRINT_RQ, pp->port_lh, "usbser_rq_thread: exit"); mutex_exit(&pp->port_mutex); } /* * DSD callbacks * ------------- * * Note: to avoid deadlocks with DSD, these callbacks * should not call DSD functions that can block. * * * transmit callback * * invoked by DSD when the last byte of data is transmitted over USB */ static void usbser_tx_cb(caddr_t arg) { usbser_port_t *pp = (usbser_port_t *)arg; int online; online = usbser_dev_is_online(pp->port_usp); mutex_enter(&pp->port_mutex); USB_DPRINTF_L4(DPRINT_TX_CB, pp->port_lh, "usbser_tx_cb: act=%x curthread=%p", pp->port_act, curthread); usbser_release_port_act(pp, USBSER_ACT_TX); if (online && USBSER_PORT_ACCESS_OK(pp) && !USBSER_PORT_IS_BUSY(pp)) { /* * wake wq thread for further data/ioctl processing */ usbser_thr_wake(&pp->port_wq_thread); } mutex_exit(&pp->port_mutex); } /* * receive callback * * invoked by DSD when there is more data for us to pick */ static void usbser_rx_cb(caddr_t arg) { usbser_port_t *pp = (usbser_port_t *)arg; queue_t *rq, *wq; mblk_t *mp; /* current mblk */ mblk_t *data, *data_tail; /* M_DATA mblk list and its tail */ mblk_t *emp; /* error (M_BREAK) mblk */ USB_DPRINTF_L4(DPRINT_RX_CB, pp->port_lh, "usbser_rx_cb"); if (!usbser_dev_is_online(pp->port_usp)) { return; } /* get data from DSD */ if ((mp = USBSER_DS_RX(pp)) == NULL) { return; } mutex_enter(&pp->port_mutex); if ((!USBSER_PORT_ACCESS_OK(pp)) || ((pp->port_ttycommon.t_cflag & CREAD) == 0)) { freemsg(mp); mutex_exit(&pp->port_mutex); USB_DPRINTF_L3(DPRINT_RX_CB, pp->port_lh, "usbser_rx_cb: access not ok or receiver disabled"); return; } usbser_serialize_port_act(pp, USBSER_ACT_RX); rq = pp->port_ttycommon.t_readq; wq = pp->port_ttycommon.t_writeq; mutex_exit(&pp->port_mutex); /* * DSD data is a b_cont-linked list of M_DATA and M_BREAK blocks. * M_DATA is correctly received data. * M_BREAK is a character with either framing or parity error. * * this loop runs through the list of mblks. when it meets an M_BREAK, * it sends all leading M_DATA's in one shot, then sends M_BREAK. * in the trivial case when list contains only M_DATA's, the loop * does nothing but set data variable. */ data = data_tail = NULL; while (mp) { /* * skip data until we meet M_BREAK or end of list */ if (DB_TYPE(mp) == M_DATA) { if (data == NULL) { data = mp; } data_tail = mp; mp = mp->b_cont; continue; } /* detach data list from mp */ if (data_tail) { data_tail->b_cont = NULL; } /* detach emp from the list */ emp = mp; mp = mp->b_cont; emp->b_cont = NULL; /* DSD shouldn't send anything but M_DATA or M_BREAK */ if ((DB_TYPE(emp) != M_BREAK) || (MBLKL(emp) != 2)) { freemsg(emp); USB_DPRINTF_L2(DPRINT_RX_CB, pp->port_lh, "usbser_rx_cb: bad message"); continue; } /* * first tweak and send M_DATA's */ if (data) { usbser_rx_massage_data(pp, data); usbser_rx_cb_put(pp, rq, wq, data); data = data_tail = NULL; } /* * now tweak and send M_BREAK */ mutex_enter(&pp->port_mutex); usbser_rx_massage_mbreak(pp, emp); mutex_exit(&pp->port_mutex); usbser_rx_cb_put(pp, rq, wq, emp); } /* send the rest of the data, if any */ if (data) { usbser_rx_massage_data(pp, data); usbser_rx_cb_put(pp, rq, wq, data); } mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_RX); mutex_exit(&pp->port_mutex); } /* * the joys of termio -- this is to accomodate Unix98 assertion: * * If PARENB is supported and is set, when PARMRK is set, and CSIZE is * set to CS8, and IGNPAR is clear, and ISTRIP is clear, a valid * character of '\377' is read as '\377', '\377'. * * Posix Ref: Assertion 7.1.2.2-16(C) * * this requires the driver to scan every incoming valid character */ static void usbser_rx_massage_data(usbser_port_t *pp, mblk_t *mp) { tty_common_t *tp = &pp->port_ttycommon; uchar_t *p; mblk_t *newmp; int tailsz; /* avoid scanning if possible */ mutex_enter(&pp->port_mutex); if (!((tp->t_cflag & PARENB) && (tp->t_iflag & PARMRK) && ((tp->t_cflag & CSIZE) == CS8) && ((tp->t_iflag & (IGNPAR|ISTRIP)) == 0))) { mutex_exit(&pp->port_mutex); return; } mutex_exit(&pp->port_mutex); while (mp) { for (p = mp->b_rptr; p < mp->b_wptr; ) { if (*p++ != 0377) { continue; } USB_DPRINTF_L4(DPRINT_RX_CB, pp->port_lh, "usbser_rx_massage_data: mp=%p off=%d(%d)", mp, p - mp->b_rptr - 1, MBLKL(mp)); /* * insert another 0377 after this one. all data after * the original 0377 have to be copied to the new mblk */ tailsz = mp->b_wptr - p; if ((newmp = allocb(tailsz + 1, BPRI_HI)) == NULL) { USB_DPRINTF_L2(DPRINT_RX_CB, pp->port_lh, "usbser_rx_massage_data: allocb failed"); continue; } /* fill in the new mblk */ *newmp->b_wptr++ = 0377; if (tailsz > 0) { bcopy(p, newmp->b_wptr, tailsz); newmp->b_wptr += tailsz; } /* shrink the original mblk */ mp->b_wptr = p; newmp->b_cont = mp->b_cont; mp->b_cont = newmp; p = newmp->b_rptr + 1; mp = newmp; } mp = mp->b_cont; } } /* * more joys of termio */ static void usbser_rx_massage_mbreak(usbser_port_t *pp, mblk_t *mp) { tty_common_t *tp = &pp->port_ttycommon; uchar_t err, c; err = *mp->b_rptr; c = *(mp->b_rptr + 1); if ((err & (DS_FRAMING_ERR | DS_BREAK_ERR)) && (c == 0)) { /* break */ mp->b_rptr += 2; } else if (!(tp->t_iflag & INPCK) && (err & (DS_PARITY_ERR))) { /* Posix Ref: Assertion 7.1.2.2-20(C) */ mp->b_rptr++; DB_TYPE(mp) = M_DATA; } else { /* for ldterm to handle */ mp->b_rptr++; } USB_DPRINTF_L4(DPRINT_RX_CB, pp->port_lh, "usbser_rx_massage_mbreak: type=%x len=%d [0]=0%o", DB_TYPE(mp), MBLKL(mp), (MBLKL(mp) > 0) ? *mp->b_rptr : 45); } /* * in rx callback, try to send an mblk upstream */ static void usbser_rx_cb_put(usbser_port_t *pp, queue_t *rq, queue_t *wq, mblk_t *mp) { if (canputnext(rq)) { putnext(rq, mp); } else if (canput(rq) && putq(rq, mp)) { /* * full queue indicates the need for inbound flow control */ (void) putctl(wq, M_STOPI); usbser_st_put_stopi++; USB_DPRINTF_L3(DPRINT_RX_CB, pp->port_lh, "usbser_rx_cb: cannot putnext, flow ctl"); } else { freemsg(mp); usbser_st_rx_data_loss++; (void) putctl(wq, M_STOPI); usbser_st_put_stopi++; USB_DPRINTF_L1(DPRINT_RX_CB, pp->port_lh, "input overrun"); } } /* * modem status change callback * * each time external status lines are changed, DSD calls this routine */ static void usbser_status_cb(caddr_t arg) { usbser_port_t *pp = (usbser_port_t *)arg; USB_DPRINTF_L4(DPRINT_STATUS_CB, pp->port_lh, "usbser_status_cb"); if (!usbser_dev_is_online(pp->port_usp)) { return; } /* * actual processing will be done in usbser_status_proc_cb() * running in wq thread */ mutex_enter(&pp->port_mutex); if (USBSER_PORT_ACCESS_OK(pp) || USBSER_IS_OPENING(pp)) { pp->port_flags |= USBSER_FL_STATUS_CB; usbser_thr_wake(&pp->port_wq_thread); } mutex_exit(&pp->port_mutex); } /* * modem status change */ static void usbser_status_proc_cb(usbser_port_t *pp) { tty_common_t *tp = &pp->port_ttycommon; queue_t *rq, *wq; int status; int drop_dtr = 0; int rq_msg = 0, wq_msg = 0; USB_DPRINTF_L4(DPRINT_STATUS_CB, pp->port_lh, "usbser_status_proc_cb"); pp->port_flags &= ~USBSER_FL_STATUS_CB; mutex_exit(&pp->port_mutex); if (!usbser_dev_is_online(pp->port_usp)) { mutex_enter(&pp->port_mutex); return; } /* get modem status */ if (USBSER_DS_GET_MODEM_CTL(pp, -1, &status) != USB_SUCCESS) { mutex_enter(&pp->port_mutex); return; } mutex_enter(&pp->port_mutex); usbser_serialize_port_act(pp, USBSER_ACT_CTL); rq = pp->port_ttycommon.t_readq; wq = pp->port_ttycommon.t_writeq; /* * outbound flow control */ if (tp->t_cflag & CRTSCTS) { if (!(status & TIOCM_CTS)) { /* * CTS dropped, stop xmit */ if (!(pp->port_flags & USBSER_FL_TX_STOPPED)) { wq_msg = M_STOP; } } else if (pp->port_flags & USBSER_FL_TX_STOPPED) { /* * CTS raised, resume xmit */ wq_msg = M_START; } } /* * check carrier */ if ((status & TIOCM_CD) || (tp->t_flags & TS_SOFTCAR)) { /* * carrier present */ if ((pp->port_flags & USBSER_FL_CARR_ON) == 0) { pp->port_flags |= USBSER_FL_CARR_ON; rq_msg = M_UNHANGUP; /* * wake open */ if (pp->port_flags & USBSER_FL_WOPEN) { cv_broadcast(&pp->port_car_cv); } USB_DPRINTF_L4(DPRINT_STATUS_CB, pp->port_lh, "usbser_status_cb: carr on"); } } else if (pp->port_flags & USBSER_FL_CARR_ON) { pp->port_flags &= ~USBSER_FL_CARR_ON; /* * carrier went away: if not local line, drop DTR */ if (!(tp->t_cflag & CLOCAL)) { drop_dtr = 1; rq_msg = M_HANGUP; } if ((pp->port_flags & USBSER_FL_TX_STOPPED) && (wq_msg == 0)) { wq_msg = M_START; } USB_DPRINTF_L4(DPRINT_STATUS_CB, pp->port_lh, "usbser_status_cb: carr off"); } mutex_exit(&pp->port_mutex); USB_DPRINTF_L4(DPRINT_STATUS_CB, pp->port_lh, "usbser_status_cb: rq_msg=%d wq_msg=%d", rq_msg, wq_msg); /* * commit postponed actions now * do so only if port is fully open (queues are enabled) */ if (rq) { if (rq_msg) { (void) putnextctl(rq, rq_msg); } if (drop_dtr) { (void) USBSER_DS_SET_MODEM_CTL(pp, TIOCM_DTR, 0); } if (wq_msg) { (void) putctl(wq, wq_msg); } } mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_CTL); } /* * serial support * -------------- * * * this routine is run by wq thread every time it's woken, * i.e. when the queue contains messages to process */ static void usbser_wmsg(usbser_port_t *pp) { queue_t *q = pp->port_ttycommon.t_writeq; mblk_t *mp; int msgtype; ASSERT(mutex_owned(&pp->port_mutex)); if (q == NULL) { USB_DPRINTF_L3(DPRINT_WQ, pp->port_lh, "usbser_wmsg: q=NULL"); return; } USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wmsg: q=%p act=%x 0x%x", q, pp->port_act, q->q_first ? DB_TYPE(q->q_first) : 0xff); while ((mp = getq(q)) != NULL) { msgtype = DB_TYPE(mp); USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_wmsg: " "type=%s (0x%x)", usbser_msgtype2str(msgtype), msgtype); switch (msgtype) { /* * high-priority messages */ case M_STOP: usbser_stop(pp, mp); break; case M_START: usbser_start(pp, mp); break; case M_STOPI: usbser_stopi(pp, mp); break; case M_STARTI: usbser_starti(pp, mp); break; case M_IOCDATA: usbser_iocdata(pp, mp); break; case M_FLUSH: usbser_flush(pp, mp); break; /* * normal-priority messages */ case M_BREAK: usbser_break(pp, mp); break; case M_DELAY: usbser_delay(pp, mp); break; case M_DATA: if (usbser_data(pp, mp) != USB_SUCCESS) { (void) putbq(q, mp); return; } break; case M_IOCTL: if (usbser_ioctl(pp, mp) != USB_SUCCESS) { (void) putbq(q, mp); return; } break; default: freemsg(mp); break; } } } /* * process M_DATA message */ static int usbser_data(usbser_port_t *pp, mblk_t *mp) { /* put off until current transfer ends or delay is over */ if ((pp->port_act & USBSER_ACT_TX) || (pp->port_act & USBSER_ACT_DELAY)) { return (USB_FAILURE); } if ((MBLKL(mp) <= 0)) { freemsg(mp); return (USB_SUCCESS); } pp->port_act |= USBSER_ACT_TX; pp->port_wq_data_cnt -= msgdsize(mp); mutex_exit(&pp->port_mutex); /* DSD is required to accept data block in any case */ (void) USBSER_DS_TX(pp, mp); mutex_enter(&pp->port_mutex); return (USB_SUCCESS); } /* * process an M_IOCTL message */ static int usbser_ioctl(usbser_port_t *pp, mblk_t *mp) { tty_common_t *tp = &pp->port_ttycommon; queue_t *q = tp->t_writeq; struct iocblk *iocp; int cmd; mblk_t *datamp; int error = 0, rval; int val; ASSERT(mutex_owned(&pp->port_mutex)); ASSERT(DB_TYPE(mp) == M_IOCTL); iocp = (struct iocblk *)mp->b_rptr; cmd = iocp->ioc_cmd; USB_DPRINTF_L4(DPRINT_IOCTL, pp->port_lh, "usbser_ioctl: " "mp=%p %s (0x%x)", mp, usbser_ioctl2str(cmd), cmd); if (tp->t_iocpending != NULL) { /* * We were holding an ioctl response pending the * availability of an mblk to hold data to be passed up; * another ioctl came through, which means that ioctl * must have timed out or been aborted. */ freemsg(tp->t_iocpending); tp->t_iocpending = NULL; } switch (cmd) { case TIOCMGET: case TIOCMBIC: case TIOCMBIS: case TIOCMSET: case CONSOPENPOLLEDIO: case CONSCLOSEPOLLEDIO: case CONSSETABORTENABLE: case CONSGETABORTENABLE: /* * For the above ioctls do not call ttycommon_ioctl() because * this function frees up the message block (mp->b_cont) that * contains the address of the user variable where we need to * pass back the bit array. */ error = -1; usbser_serialize_port_act(pp, USBSER_ACT_CTL); mutex_exit(&pp->port_mutex); break; case TCSBRK: /* serialize breaks */ if (pp->port_act & USBSER_ACT_BREAK) { return (USB_FAILURE); } default: usbser_serialize_port_act(pp, USBSER_ACT_CTL); mutex_exit(&pp->port_mutex); (void) ttycommon_ioctl(tp, q, mp, &error); } if (error == 0) { /* * ttycommon_ioctl() did most of the work * we just use the data it set up */ switch (cmd) { case TCSETSF: case TCSETSW: case TCSETA: case TCSETAW: case TCSETAF: (void) USBSER_DS_FIFO_DRAIN(pp, DS_TX); /* FALLTHRU */ case TCSETS: mutex_enter(&pp->port_mutex); error = usbser_port_program(pp); mutex_exit(&pp->port_mutex); break; } goto end; } else if (error > 0) { USB_DPRINTF_L3(DPRINT_IOCTL, pp->port_lh, "usbser_ioctl: " "ttycommon_ioctl returned %d", error); goto end; } /* * error < 0: ttycommon_ioctl() didn't do anything, we process it here */ error = 0; switch (cmd) { case TCSBRK: if ((error = miocpullup(mp, sizeof (int))) != 0) { break; } /* drain output */ (void) USBSER_DS_FIFO_DRAIN(pp, USBSER_TX_FIFO_DRAIN_TIMEOUT); /* * if required, set break */ if (*(int *)mp->b_cont->b_rptr == 0) { if (USBSER_DS_BREAK_CTL(pp, DS_ON) != USB_SUCCESS) { error = EIO; break; } mutex_enter(&pp->port_mutex); pp->port_act |= USBSER_ACT_BREAK; pp->port_delay_id = timeout(usbser_restart, pp, drv_usectohz(250000)); mutex_exit(&pp->port_mutex); } break; case TIOCSBRK: /* set break */ if (USBSER_DS_BREAK_CTL(pp, DS_ON) != USB_SUCCESS) { error = EIO; } break; case TIOCCBRK: /* clear break */ if (USBSER_DS_BREAK_CTL(pp, DS_OFF) != USB_SUCCESS) { error = EIO; } break; case TIOCMSET: case TIOCMBIS: case TIOCMBIC: if (iocp->ioc_count == TRANSPARENT) { mcopyin(mp, NULL, sizeof (int), NULL); break; } if ((error = miocpullup(mp, sizeof (int))) != 0) { break; } val = *(int *)mp->b_cont->b_rptr; if (cmd == TIOCMSET) { rval = USBSER_DS_SET_MODEM_CTL(pp, -1, val); } else if (cmd == TIOCMBIS) { rval = USBSER_DS_SET_MODEM_CTL(pp, val, -1); } else if (cmd == TIOCMBIC) { rval = USBSER_DS_SET_MODEM_CTL(pp, val, 0); } if (rval != USB_SUCCESS) { error = EIO; } break; case (tIOC | 109): /* TIOCSILOOP */ if (USBSER_DS_LOOPBACK_SUPPORTED(pp)) { if (USBSER_DS_LOOPBACK(pp, DS_ON) != USB_SUCCESS) { error = EIO; } else { iocp->ioc_error = 0; mp->b_datap->db_type = M_IOCACK; } } else { error = EINVAL; } break; case (tIOC | 108): /* TIOCCILOOP */ if (USBSER_DS_LOOPBACK_SUPPORTED(pp)) { if (USBSER_DS_LOOPBACK(pp, DS_OFF) != USB_SUCCESS) { error = EIO; } else { iocp->ioc_error = 0; mp->b_datap->db_type = M_IOCACK; } } else { error = EINVAL; } break; case TIOCMGET: datamp = allocb(sizeof (int), BPRI_MED); if (datamp == NULL) { error = EAGAIN; break; } rval = USBSER_DS_GET_MODEM_CTL(pp, -1, (int *)datamp->b_rptr); if (rval != USB_SUCCESS) { error = EIO; break; } if (iocp->ioc_count == TRANSPARENT) { mcopyout(mp, NULL, sizeof (int), NULL, datamp); } else { if (mp->b_cont != NULL) { freemsg(mp->b_cont); } mp->b_cont = datamp; mp->b_cont->b_wptr += sizeof (int); iocp->ioc_count = sizeof (int); } break; case CONSOPENPOLLEDIO: error = usbser_polledio_init(pp); if (error != 0) break; error = miocpullup(mp, sizeof (struct cons_polledio *)); if (error != 0) break; *(struct cons_polledio **)mp->b_cont->b_rptr = &usbser_polledio; mp->b_datap->db_type = M_IOCACK; break; case CONSCLOSEPOLLEDIO: usbser_polledio_fini(pp); mp->b_datap->db_type = M_IOCACK; mp->b_datap->db_type = M_IOCACK; iocp->ioc_error = 0; iocp->ioc_rval = 0; break; case CONSSETABORTENABLE: error = secpolicy_console(iocp->ioc_cr); if (error != 0) break; if (iocp->ioc_count != TRANSPARENT) { error = EINVAL; break; } /* * To do: implement console abort support * This involves adding a console flag to usbser * state structure. If flag is set, parse input stream * for abort sequence (see asy for example). * * For now, run mdb -K to get kmdb prompt. */ if (*(intptr_t *)mp->b_cont->b_rptr) usbser_console_abort = 1; else usbser_console_abort = 0; mp->b_datap->db_type = M_IOCACK; iocp->ioc_error = 0; iocp->ioc_rval = 0; break; case CONSGETABORTENABLE: /*CONSTANTCONDITION*/ ASSERT(sizeof (boolean_t) <= sizeof (boolean_t *)); /* * Store the return value right in the payload * we were passed. Crude. */ mcopyout(mp, NULL, sizeof (boolean_t), NULL, NULL); *(boolean_t *)mp->b_cont->b_rptr = (usbser_console_abort != 0); break; default: error = EINVAL; break; } end: if (error != 0) { iocp->ioc_error = error; mp->b_datap->db_type = M_IOCNAK; } qreply(q, mp); mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_CTL); return (USB_SUCCESS); } /* * process M_IOCDATA message */ static void usbser_iocdata(usbser_port_t *pp, mblk_t *mp) { tty_common_t *tp = &pp->port_ttycommon; queue_t *q = tp->t_writeq; struct iocblk *ip; struct copyresp *csp; int cmd; int val; int rval; ASSERT(mutex_owned(&pp->port_mutex)); ip = (struct iocblk *)mp->b_rptr; csp = (struct copyresp *)mp->b_rptr; cmd = csp->cp_cmd; if (csp->cp_rval != 0) { freemsg(mp); return; } switch (cmd) { case TIOCMSET: case TIOCMBIS: case TIOCMBIC: if ((mp->b_cont == NULL) || (MBLKL(mp->b_cont) < sizeof (int))) { miocnak(q, mp, 0, EINVAL); break; } val = *(int *)mp->b_cont->b_rptr; usbser_serialize_port_act(pp, USBSER_ACT_CTL); mutex_exit(&pp->port_mutex); if (cmd == TIOCMSET) { rval = USBSER_DS_SET_MODEM_CTL(pp, -1, val); } else if (cmd == TIOCMBIS) { rval = USBSER_DS_SET_MODEM_CTL(pp, val, -1); } else if (cmd == TIOCMBIC) { rval = USBSER_DS_SET_MODEM_CTL(pp, val, 0); } if (mp->b_cont) { freemsg(mp->b_cont); mp->b_cont = NULL; } ip->ioc_rval = 0; if (rval == USB_SUCCESS) { miocack(q, mp, 0, 0); } else { miocnak(q, mp, 0, EIO); } mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_CTL); break; case TIOCMGET: mutex_exit(&pp->port_mutex); if (mp->b_cont) { freemsg(mp->b_cont); mp->b_cont = NULL; } ip->ioc_rval = 0; miocack(q, mp, 0, 0); mutex_enter(&pp->port_mutex); break; default: mutex_exit(&pp->port_mutex); miocnak(q, mp, 0, EINVAL); mutex_enter(&pp->port_mutex); break; } } /* * handle M_START[I]/M_STOP[I] messages */ static void usbser_stop(usbser_port_t *pp, mblk_t *mp) { usbser_st_mstop++; if (!(pp->port_flags & USBSER_FL_TX_STOPPED)) { usbser_serialize_port_act(pp, USBSER_ACT_CTL); pp->port_flags |= USBSER_FL_TX_STOPPED; mutex_exit(&pp->port_mutex); USBSER_DS_STOP(pp, DS_TX); mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_TX); usbser_release_port_act(pp, USBSER_ACT_CTL); } freemsg(mp); } static void usbser_start(usbser_port_t *pp, mblk_t *mp) { usbser_st_mstart++; if (pp->port_flags & USBSER_FL_TX_STOPPED) { usbser_serialize_port_act(pp, USBSER_ACT_CTL); pp->port_flags &= ~USBSER_FL_TX_STOPPED; mutex_exit(&pp->port_mutex); USBSER_DS_START(pp, DS_TX); mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_CTL); } freemsg(mp); } static void usbser_stopi(usbser_port_t *pp, mblk_t *mp) { usbser_st_mstopi++; usbser_serialize_port_act(pp, USBSER_ACT_CTL); pp->port_flowc = pp->port_ttycommon.t_stopc; usbser_inbound_flow_ctl(pp); usbser_release_port_act(pp, USBSER_ACT_CTL); freemsg(mp); } static void usbser_starti(usbser_port_t *pp, mblk_t *mp) { usbser_st_mstarti++; usbser_serialize_port_act(pp, USBSER_ACT_CTL); pp->port_flowc = pp->port_ttycommon.t_startc; usbser_inbound_flow_ctl(pp); usbser_release_port_act(pp, USBSER_ACT_CTL); freemsg(mp); } /* * process M_FLUSH message */ static void usbser_flush(usbser_port_t *pp, mblk_t *mp) { queue_t *q = pp->port_ttycommon.t_writeq; if (*mp->b_rptr & FLUSHW) { mutex_exit(&pp->port_mutex); (void) USBSER_DS_FIFO_FLUSH(pp, DS_TX); /* flush FIFO buffers */ flushq(q, FLUSHDATA); /* flush write queue */ mutex_enter(&pp->port_mutex); usbser_release_port_act(pp, USBSER_ACT_TX); *mp->b_rptr &= ~FLUSHW; } if (*mp->b_rptr & FLUSHR) { /* * flush FIFO buffers */ mutex_exit(&pp->port_mutex); (void) USBSER_DS_FIFO_FLUSH(pp, DS_RX); flushq(RD(q), FLUSHDATA); qreply(q, mp); mutex_enter(&pp->port_mutex); } else { freemsg(mp); } } /* * process M_BREAK message */ static void usbser_break(usbser_port_t *pp, mblk_t *mp) { int rval; /* * set the break and arrange for usbser_restart() to be called in 1/4 s */ mutex_exit(&pp->port_mutex); rval = USBSER_DS_BREAK_CTL(pp, DS_ON); mutex_enter(&pp->port_mutex); if (rval == USB_SUCCESS) { pp->port_act |= USBSER_ACT_BREAK; pp->port_delay_id = timeout(usbser_restart, pp, drv_usectohz(250000)); } freemsg(mp); } /* * process M_DELAY message */ static void usbser_delay(usbser_port_t *pp, mblk_t *mp) { /* * arrange for usbser_restart() to be called when the delay expires */ pp->port_act |= USBSER_ACT_DELAY; pp->port_delay_id = timeout(usbser_restart, pp, (clock_t)(*(uchar_t *)mp->b_rptr + 6)); freemsg(mp); } /* * restart output on a line after a delay or break timer expired */ static void usbser_restart(void *arg) { usbser_port_t *pp = (usbser_port_t *)arg; USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_restart"); mutex_enter(&pp->port_mutex); /* if cancelled, return immediately */ if (pp->port_delay_id == 0) { mutex_exit(&pp->port_mutex); return; } pp->port_delay_id = 0; /* clear break if necessary */ if (pp->port_act & USBSER_ACT_BREAK) { mutex_exit(&pp->port_mutex); (void) USBSER_DS_BREAK_CTL(pp, DS_OFF); mutex_enter(&pp->port_mutex); } usbser_release_port_act(pp, USBSER_ACT_BREAK | USBSER_ACT_DELAY); /* wake wq thread to resume message processing */ usbser_thr_wake(&pp->port_wq_thread); mutex_exit(&pp->port_mutex); } /* * program port hardware with the chosen parameters * most of the operation is based on the values of 'c_iflag' and 'c_cflag' */ static int usbser_port_program(usbser_port_t *pp) { tty_common_t *tp = &pp->port_ttycommon; int baudrate; int c_flag; ds_port_param_entry_t pe[6]; ds_port_params_t params; int flow_ctl, ctl_val; int err = 0; baudrate = tp->t_cflag & CBAUD; if (tp->t_cflag & CBAUDEXT) { baudrate += 16; } /* * set input speed same as output, as split speed not supported */ if (tp->t_cflag & (CIBAUD|CIBAUDEXT)) { tp->t_cflag &= ~(CIBAUD); if (baudrate > CBAUD) { tp->t_cflag |= CIBAUDEXT; tp->t_cflag |= (((baudrate - CBAUD - 1) << IBSHIFT) & CIBAUD); } else { tp->t_cflag &= ~CIBAUDEXT; tp->t_cflag |= ((baudrate << IBSHIFT) & CIBAUD); } } c_flag = tp->t_cflag; /* * flow control */ flow_ctl = tp->t_iflag & (IXON | IXANY | IXOFF); if (c_flag & CRTSCTS) { flow_ctl |= CTSXON; } if (c_flag & CRTSXOFF) { flow_ctl |= RTSXOFF; } /* * fill in port parameters we need to set: * * baud rate */ pe[0].param = DS_PARAM_BAUD; pe[0].val.ui = baudrate; /* stop bits */ pe[1].param = DS_PARAM_STOPB; pe[1].val.ui = c_flag & CSTOPB; /* parity */ pe[2].param = DS_PARAM_PARITY; pe[2].val.ui = c_flag & (PARENB | PARODD); /* char size */ pe[3].param = DS_PARAM_CHARSZ; pe[3].val.ui = c_flag & CSIZE; /* start & stop chars */ pe[4].param = DS_PARAM_XON_XOFF; pe[4].val.uc[0] = tp->t_startc; pe[4].val.uc[1] = tp->t_stopc; /* flow control */ pe[5].param = DS_PARAM_FLOW_CTL; pe[5].val.ui = flow_ctl; params.tp_entries = &pe[0]; params.tp_cnt = 6; /* control signals */ ctl_val = TIOCM_DTR | TIOCM_RTS; if (baudrate == 0) { ctl_val &= ~TIOCM_DTR; /* zero baudrate means drop DTR */ } if (pp->port_flags & USBSER_FL_RX_STOPPED) { ctl_val &= ~TIOCM_RTS; } /* submit */ mutex_exit(&pp->port_mutex); err = USBSER_DS_SET_PORT_PARAMS(pp, ¶ms); if (err != USB_SUCCESS) { mutex_enter(&pp->port_mutex); return (EINVAL); } err = USBSER_DS_SET_MODEM_CTL(pp, TIOCM_DTR | TIOCM_RTS, ctl_val); mutex_enter(&pp->port_mutex); return ((err == USB_SUCCESS) ? 0 : EIO); } /* * check if any inbound flow control action needed */ static void usbser_inbound_flow_ctl(usbser_port_t *pp) { tcflag_t need_hw; int rts; char c = pp->port_flowc; mblk_t *mp = NULL; USB_DPRINTF_L4(DPRINT_WQ, pp->port_lh, "usbser_inbound_flow_ctl: c=%x cflag=%x port_flags=%x", c, pp->port_ttycommon.t_cflag, pp->port_flags); if (c == '\0') { return; } pp->port_flowc = '\0'; /* * if inbound hardware flow control enabled, we need to frob RTS */ need_hw = (pp->port_ttycommon.t_cflag & CRTSXOFF); if (c == pp->port_ttycommon.t_startc) { rts = TIOCM_RTS; pp->port_flags &= ~USBSER_FL_RX_STOPPED; } else { rts = 0; pp->port_flags |= USBSER_FL_RX_STOPPED; } /* * if character flow control active, transmit a start or stop char, */ if (pp->port_ttycommon.t_iflag & IXOFF) { if ((mp = allocb(1, BPRI_LO)) == NULL) { USB_DPRINTF_L2(DPRINT_WQ, pp->port_lh, "usbser_inbound_flow_ctl: allocb failed"); } else { *mp->b_wptr++ = c; pp->port_flags |= USBSER_ACT_TX; } } mutex_exit(&pp->port_mutex); if (need_hw) { (void) USBSER_DS_SET_MODEM_CTL(pp, TIOCM_RTS, rts); } if (mp) { (void) USBSER_DS_TX(pp, mp); } mutex_enter(&pp->port_mutex); } /* * misc * ---- * * * returns !=0 if device is online, 0 otherwise */ static int usbser_dev_is_online(usbser_state_t *usp) { int rval; mutex_enter(&usp->us_mutex); rval = (usp->us_dev_state == USB_DEV_ONLINE); mutex_exit(&usp->us_mutex); return (rval); } /* * serialize port activities defined by 'act' mask */ static void usbser_serialize_port_act(usbser_port_t *pp, int act) { while (pp->port_act & act) { cv_wait(&pp->port_act_cv, &pp->port_mutex); } pp->port_act |= act; } /* * indicate that port activity is finished */ static void usbser_release_port_act(usbser_port_t *pp, int act) { pp->port_act &= ~act; cv_broadcast(&pp->port_act_cv); } /* * message type to string and back conversion. * * pardon breaks on the same line, but as long as cstyle doesn't * complain, I'd like to keep this form for trivial cases like this. * associative arrays in the kernel, anyone? */ static char * usbser_msgtype2str(int type) { char *str; switch (type) { case M_STOP: str = "M_STOP"; break; case M_START: str = "M_START"; break; case M_STOPI: str = "M_STOPI"; break; case M_STARTI: str = "M_STARTI"; break; case M_DATA: str = "M_DATA"; break; case M_DELAY: str = "M_DELAY"; break; case M_BREAK: str = "M_BREAK"; break; case M_IOCTL: str = "M_IOCTL"; break; case M_IOCDATA: str = "M_IOCDATA"; break; case M_FLUSH: str = "M_FLUSH"; break; case M_CTL: str = "M_CTL"; break; case M_READ: str = "M_READ"; break; default: str = "unknown"; break; } return (str); } static char * usbser_ioctl2str(int ioctl) { char *str; switch (ioctl) { case TCGETA: str = "TCGETA"; break; case TCSETA: str = "TCSETA"; break; case TCSETAF: str = "TCSETAF"; break; case TCSETAW: str = "TCSETAW"; break; case TCSBRK: str = "TCSBRK"; break; case TCXONC: str = "TCXONC"; break; case TCFLSH: str = "TCFLSH"; break; case TCGETS: str = "TCGETS"; break; case TCSETS: str = "TCSETS"; break; case TCSETSF: str = "TCSETSF"; break; case TCSETSW: str = "TCSETSW"; break; case TIOCSBRK: str = "TIOCSBRK"; break; case TIOCCBRK: str = "TIOCCBRK"; break; case TIOCMSET: str = "TIOCMSET"; break; case TIOCMBIS: str = "TIOCMBIS"; break; case TIOCMBIC: str = "TIOCMBIC"; break; case TIOCMGET: str = "TIOCMGET"; break; case (tIOC | 109): str = "TIOCSILOOP"; break; case (tIOC | 108): str = "TIOCCILOOP"; break; case TCGETX: str = "TCGETX"; break; case TCSETX: str = "TCGETX"; break; case TCSETXW: str = "TCGETX"; break; case TCSETXF: str = "TCGETX"; break; default: str = "unknown"; break; } return (str); } /* * Polled IO support */ /* called once by consconfig() when polledio is opened */ static int usbser_polledio_init(usbser_port_t *pp) { int err; usb_pipe_handle_t hdl; ds_ops_t *ds_ops = pp->port_ds_ops; /* only one serial line console supported */ if (console_input != NULL) return (USB_FAILURE); /* check if underlying driver supports polled io */ if (ds_ops->ds_version < DS_OPS_VERSION_V1 || ds_ops->ds_out_pipe == NULL || ds_ops->ds_in_pipe == NULL) return (USB_FAILURE); /* init polled input pipe */ hdl = ds_ops->ds_in_pipe(pp->port_ds_hdl, pp->port_num); err = usb_console_input_init(pp->port_usp->us_dip, hdl, &console_input_buf, &console_input); if (err) return (USB_FAILURE); /* init polled output pipe */ hdl = ds_ops->ds_out_pipe(pp->port_ds_hdl, pp->port_num); err = usb_console_output_init(pp->port_usp->us_dip, hdl, &console_output); if (err) { (void) usb_console_input_fini(console_input); console_input = NULL; return (USB_FAILURE); } return (USB_SUCCESS); } /* called once by consconfig() when polledio is closed */ /*ARGSUSED*/ static void usbser_polledio_fini(usbser_port_t *pp) { /* Since we can't move the console, there is nothing to do. */ } /*ARGSUSED*/ static void usbser_polledio_enter(cons_polledio_arg_t arg) { (void) usb_console_input_enter(console_input); (void) usb_console_output_enter(console_output); } /*ARGSUSED*/ static void usbser_polledio_exit(cons_polledio_arg_t arg) { (void) usb_console_output_exit(console_output); (void) usb_console_input_exit(console_input); } /*ARGSUSED*/ static void usbser_putchar(cons_polledio_arg_t arg, uchar_t c) { static uchar_t cr[2] = {'\r', '\n'}; uint_t nout; if (c == '\n') (void) usb_console_write(console_output, cr, 2, &nout); else (void) usb_console_write(console_output, &c, 1, &nout); } /*ARGSUSED*/ static int usbser_getchar(cons_polledio_arg_t arg) { while (!usbser_ischar(arg)) ; return (*console_input_start++); } /*ARGSUSED*/ static boolean_t usbser_ischar(cons_polledio_arg_t arg) { uint_t num_bytes; if (console_input_start < console_input_end) return (1); if (usb_console_read(console_input, &num_bytes) != USB_SUCCESS) return (0); console_input_start = console_input_buf; console_input_end = console_input_buf + num_bytes; return (num_bytes != 0); }