diff options
Diffstat (limited to 'sys/dev/usb/bluetooth/ng_ubt.c')
| -rw-r--r-- | sys/dev/usb/bluetooth/ng_ubt.c | 1718 |
1 files changed, 1718 insertions, 0 deletions
diff --git a/sys/dev/usb/bluetooth/ng_ubt.c b/sys/dev/usb/bluetooth/ng_ubt.c new file mode 100644 index 000000000000..07ac2194699c --- /dev/null +++ b/sys/dev/usb/bluetooth/ng_ubt.c @@ -0,0 +1,1718 @@ +/* + * ng_ubt.c + */ + +/*- + * Copyright (c) 2001-2009 Maksim Yevmenkin <m_evmenkin@yahoo.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id: ng_ubt.c,v 1.16 2003/10/10 19:15:06 max Exp $ + * $FreeBSD$ + */ + +/* + * NOTE: ng_ubt2 driver has a split personality. On one side it is + * a USB device driver and on the other it is a Netgraph node. This + * driver will *NOT* create traditional /dev/ enties, only Netgraph + * node. + * + * NOTE ON LOCKS USED: ng_ubt2 drives uses 2 locks (mutexes) + * + * 1) sc_if_mtx - lock for device's interface #0 and #1. This lock is used + * by USB for any USB request going over device's interface #0 and #1, + * i.e. interrupt, control, bulk and isoc. transfers. + * + * 2) sc_ng_mtx - this lock is used to protect shared (between USB, Netgraph + * and Taskqueue) data, such as outgoing mbuf queues, task flags and hook + * pointer. This lock *SHOULD NOT* be grabbed for a long time. In fact, + * think of it as a spin lock. + * + * NOTE ON LOCKING STRATEGY: ng_ubt2 driver operates in 3 different contexts. + * + * 1) USB context. This is where all the USB related stuff happens. All + * callbacks run in this context. All callbacks are called (by USB) with + * appropriate interface lock held. It is (generally) allowed to grab + * any additional locks. + * + * 2) Netgraph context. This is where all the Netgraph related stuff happens. + * Since we mark node as WRITER, the Netgraph node will be "locked" (from + * Netgraph point of view). Any variable that is only modified from the + * Netgraph context does not require any additonal locking. It is generally + * *NOT* allowed to grab *ANY* additional locks. Whatever you do, *DO NOT* + * grab any lock in the Netgraph context that could cause de-scheduling of + * the Netgraph thread for significant amount of time. In fact, the only + * lock that is allowed in the Netgraph context is the sc_ng_mtx lock. + * Also make sure that any code that is called from the Netgraph context + * follows the rule above. + * + * 3) Taskqueue context. This is where ubt_task runs. Since we are generally + * NOT allowed to grab any lock that could cause de-scheduling in the + * Netgraph context, and, USB requires us to grab interface lock before + * doing things with transfers, it is safer to transition from the Netgraph + * context to the Taskqueue context before we can call into USB subsystem. + * + * So, to put everything together, the rules are as follows. + * It is OK to call from the USB context or the Taskqueue context into + * the Netgraph context (i.e. call NG_SEND_xxx functions). In other words + * it is allowed to call into the Netgraph context with locks held. + * Is it *NOT* OK to call from the Netgraph context into the USB context, + * because USB requires us to grab interface locks, and, it is safer to + * avoid it. So, to make things safer we set task flags to indicate which + * actions we want to perform and schedule ubt_task which would run in the + * Taskqueue context. + * Is is OK to call from the Taskqueue context into the USB context, + * and, ubt_task does just that (i.e. grabs appropriate interface locks + * before calling into USB). + * Access to the outgoing queues, task flags and hook pointer is + * controlled by the sc_ng_mtx lock. It is an unavoidable evil. Again, + * sc_ng_mtx should really be a spin lock (and it is very likely to an + * equivalent of spin lock due to adaptive nature of freebsd mutexes). + * All USB callbacks accept softc pointer as a private data. USB ensures + * that this pointer is valid. + */ + +#include "usbdevs.h" +#include <dev/usb/usb.h> +#include <dev/usb/usb_mfunc.h> +#include <dev/usb/usb_error.h> + +#define USB_DEBUG_VAR usb2_debug + +#include <dev/usb/usb_core.h> +#include <dev/usb/usb_debug.h> +#include <dev/usb/usb_parse.h> +#include <dev/usb/usb_lookup.h> +#include <dev/usb/usb_util.h> +#include <dev/usb/usb_busdma.h> +#include <dev/usb/usb_process.h> +#include <dev/usb/usb_transfer.h> + +#include <sys/mbuf.h> +#include <sys/taskqueue.h> + +#include <netgraph/ng_message.h> +#include <netgraph/netgraph.h> +#include <netgraph/ng_parse.h> +#include <netgraph/bluetooth/include/ng_bluetooth.h> +#include <netgraph/bluetooth/include/ng_hci.h> +#include <netgraph/bluetooth/include/ng_ubt.h> + +#include <dev/usb/bluetooth/ng_ubt_var.h> + +static int ubt_modevent(module_t, int, void *); +static device_probe_t ubt_probe; +static device_attach_t ubt_attach; +static device_detach_t ubt_detach; + +static void ubt_task_schedule(ubt_softc_p, int); +static task_fn_t ubt_task; + +#define ubt_xfer_start(sc, i) usb2_transfer_start((sc)->sc_xfer[(i)]) + +/* Netgraph methods */ +static ng_constructor_t ng_ubt_constructor; +static ng_shutdown_t ng_ubt_shutdown; +static ng_newhook_t ng_ubt_newhook; +static ng_connect_t ng_ubt_connect; +static ng_disconnect_t ng_ubt_disconnect; +static ng_rcvmsg_t ng_ubt_rcvmsg; +static ng_rcvdata_t ng_ubt_rcvdata; + +/* Queue length */ +static const struct ng_parse_struct_field ng_ubt_node_qlen_type_fields[] = +{ + { "queue", &ng_parse_int32_type, }, + { "qlen", &ng_parse_int32_type, }, + { NULL, } +}; +static const struct ng_parse_type ng_ubt_node_qlen_type = +{ + &ng_parse_struct_type, + &ng_ubt_node_qlen_type_fields +}; + +/* Stat info */ +static const struct ng_parse_struct_field ng_ubt_node_stat_type_fields[] = +{ + { "pckts_recv", &ng_parse_uint32_type, }, + { "bytes_recv", &ng_parse_uint32_type, }, + { "pckts_sent", &ng_parse_uint32_type, }, + { "bytes_sent", &ng_parse_uint32_type, }, + { "oerrors", &ng_parse_uint32_type, }, + { "ierrors", &ng_parse_uint32_type, }, + { NULL, } +}; +static const struct ng_parse_type ng_ubt_node_stat_type = +{ + &ng_parse_struct_type, + &ng_ubt_node_stat_type_fields +}; + +/* Netgraph node command list */ +static const struct ng_cmdlist ng_ubt_cmdlist[] = +{ + { + NGM_UBT_COOKIE, + NGM_UBT_NODE_SET_DEBUG, + "set_debug", + &ng_parse_uint16_type, + NULL + }, + { + NGM_UBT_COOKIE, + NGM_UBT_NODE_GET_DEBUG, + "get_debug", + NULL, + &ng_parse_uint16_type + }, + { + NGM_UBT_COOKIE, + NGM_UBT_NODE_SET_QLEN, + "set_qlen", + &ng_ubt_node_qlen_type, + NULL + }, + { + NGM_UBT_COOKIE, + NGM_UBT_NODE_GET_QLEN, + "get_qlen", + &ng_ubt_node_qlen_type, + &ng_ubt_node_qlen_type + }, + { + NGM_UBT_COOKIE, + NGM_UBT_NODE_GET_STAT, + "get_stat", + NULL, + &ng_ubt_node_stat_type + }, + { + NGM_UBT_COOKIE, + NGM_UBT_NODE_RESET_STAT, + "reset_stat", + NULL, + NULL + }, + { 0, } +}; + +/* Netgraph node type */ +static struct ng_type typestruct = +{ + .version = NG_ABI_VERSION, + .name = NG_UBT_NODE_TYPE, + .constructor = ng_ubt_constructor, + .rcvmsg = ng_ubt_rcvmsg, + .shutdown = ng_ubt_shutdown, + .newhook = ng_ubt_newhook, + .connect = ng_ubt_connect, + .rcvdata = ng_ubt_rcvdata, + .disconnect = ng_ubt_disconnect, + .cmdlist = ng_ubt_cmdlist +}; + +/**************************************************************************** + **************************************************************************** + ** USB specific + **************************************************************************** + ****************************************************************************/ + +/* USB methods */ +static usb2_callback_t ubt_ctrl_write_callback; +static usb2_callback_t ubt_intr_read_callback; +static usb2_callback_t ubt_bulk_read_callback; +static usb2_callback_t ubt_bulk_write_callback; +static usb2_callback_t ubt_isoc_read_callback; +static usb2_callback_t ubt_isoc_write_callback; + +static int ubt_fwd_mbuf_up(ubt_softc_p, struct mbuf **); +static int ubt_isoc_read_one_frame(struct usb2_xfer *, int); + +/* + * USB config + * + * The following desribes usb transfers that could be submitted on USB device. + * + * Interface 0 on the USB device must present the following endpoints + * 1) Interrupt endpoint to receive HCI events + * 2) Bulk IN endpoint to receive ACL data + * 3) Bulk OUT endpoint to send ACL data + * + * Interface 1 on the USB device must present the following endpoints + * 1) Isochronous IN endpoint to receive SCO data + * 2) Isochronous OUT endpoint to send SCO data + */ + +static const struct usb2_config ubt_config[UBT_N_TRANSFER] = +{ + /* + * Interface #0 + */ + + /* Outgoing bulk transfer - ACL packets */ + [UBT_IF_0_BULK_DT_WR] = { + .type = UE_BULK, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_OUT, + .if_index = 0, + .mh.bufsize = UBT_BULK_WRITE_BUFFER_SIZE, + .mh.flags = { .pipe_bof = 1, .force_short_xfer = 1, }, + .mh.callback = &ubt_bulk_write_callback, + }, + /* Incoming bulk transfer - ACL packets */ + [UBT_IF_0_BULK_DT_RD] = { + .type = UE_BULK, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_IN, + .if_index = 0, + .mh.bufsize = UBT_BULK_READ_BUFFER_SIZE, + .mh.flags = { .pipe_bof = 1, .short_xfer_ok = 1, }, + .mh.callback = &ubt_bulk_read_callback, + }, + /* Incoming interrupt transfer - HCI events */ + [UBT_IF_0_INTR_DT_RD] = { + .type = UE_INTERRUPT, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_IN, + .if_index = 0, + .mh.flags = { .pipe_bof = 1, .short_xfer_ok = 1, }, + .mh.bufsize = UBT_INTR_BUFFER_SIZE, + .mh.callback = &ubt_intr_read_callback, + }, + /* Outgoing control transfer - HCI commands */ + [UBT_IF_0_CTRL_DT_WR] = { + .type = UE_CONTROL, + .endpoint = 0x00, /* control pipe */ + .direction = UE_DIR_ANY, + .if_index = 0, + .mh.bufsize = UBT_CTRL_BUFFER_SIZE, + .mh.callback = &ubt_ctrl_write_callback, + .mh.timeout = 5000, /* 5 seconds */ + }, + + /* + * Interface #1 + */ + + /* Incoming isochronous transfer #1 - SCO packets */ + [UBT_IF_1_ISOC_DT_RD1] = { + .type = UE_ISOCHRONOUS, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_IN, + .if_index = 1, + .mh.bufsize = 0, /* use "wMaxPacketSize * frames" */ + .mh.frames = UBT_ISOC_NFRAMES, + .mh.flags = { .short_xfer_ok = 1, }, + .mh.callback = &ubt_isoc_read_callback, + }, + /* Incoming isochronous transfer #2 - SCO packets */ + [UBT_IF_1_ISOC_DT_RD2] = { + .type = UE_ISOCHRONOUS, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_IN, + .if_index = 1, + .mh.bufsize = 0, /* use "wMaxPacketSize * frames" */ + .mh.frames = UBT_ISOC_NFRAMES, + .mh.flags = { .short_xfer_ok = 1, }, + .mh.callback = &ubt_isoc_read_callback, + }, + /* Outgoing isochronous transfer #1 - SCO packets */ + [UBT_IF_1_ISOC_DT_WR1] = { + .type = UE_ISOCHRONOUS, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_OUT, + .if_index = 1, + .mh.bufsize = 0, /* use "wMaxPacketSize * frames" */ + .mh.frames = UBT_ISOC_NFRAMES, + .mh.flags = { .short_xfer_ok = 1, }, + .mh.callback = &ubt_isoc_write_callback, + }, + /* Outgoing isochronous transfer #2 - SCO packets */ + [UBT_IF_1_ISOC_DT_WR2] = { + .type = UE_ISOCHRONOUS, + .endpoint = UE_ADDR_ANY, + .direction = UE_DIR_OUT, + .if_index = 1, + .mh.bufsize = 0, /* use "wMaxPacketSize * frames" */ + .mh.frames = UBT_ISOC_NFRAMES, + .mh.flags = { .short_xfer_ok = 1, }, + .mh.callback = &ubt_isoc_write_callback, + }, +}; + +/* + * If for some reason device should not be attached then put + * VendorID/ProductID pair into the list below. The format is + * as follows: + * + * { USB_VPI(VENDOR_ID, PRODUCT_ID, 0) }, + * + * where VENDOR_ID and PRODUCT_ID are hex numbers. + */ + +static const struct usb2_device_id ubt_ignore_devs[] = +{ + /* AVM USB Bluetooth-Adapter BlueFritz! v1.0 */ + { USB_VPI(USB_VENDOR_AVM, 0x2200, 0) }, +}; + +/* List of supported bluetooth devices */ +static const struct usb2_device_id ubt_devs[] = +{ + /* Generic Bluetooth class devices */ + { USB_IFACE_CLASS(UDCLASS_WIRELESS), + USB_IFACE_SUBCLASS(UDSUBCLASS_RF), + USB_IFACE_PROTOCOL(UDPROTO_BLUETOOTH) }, + + /* AVM USB Bluetooth-Adapter BlueFritz! v2.0 */ + { USB_VPI(USB_VENDOR_AVM, 0x3800, 0) }, +}; + +/* + * Probe for a USB Bluetooth device. + * USB context. + */ + +static int +ubt_probe(device_t dev) +{ + struct usb2_attach_arg *uaa = device_get_ivars(dev); + + if (uaa->usb2_mode != USB_MODE_HOST) + return (ENXIO); + + if (uaa->info.bIfaceIndex != 0) + return (ENXIO); + + if (uaa->use_generic == 0) + return (ENXIO); + + if (usb2_lookup_id_by_uaa(ubt_ignore_devs, + sizeof(ubt_ignore_devs), uaa) == 0) + return (ENXIO); + + return (usb2_lookup_id_by_uaa(ubt_devs, sizeof(ubt_devs), uaa)); +} /* ubt_probe */ + +/* + * Attach the device. + * USB context. + */ + +static int +ubt_attach(device_t dev) +{ + struct usb2_attach_arg *uaa = device_get_ivars(dev); + struct ubt_softc *sc = device_get_softc(dev); + struct usb2_endpoint_descriptor *ed; + uint16_t wMaxPacketSize; + uint8_t alt_index, i, j; + uint8_t iface_index[2] = { 0, 1 }; + + device_set_usb2_desc(dev); + + sc->sc_dev = dev; + sc->sc_debug = NG_UBT_WARN_LEVEL; + + /* + * Create Netgraph node + */ + + if (ng_make_node_common(&typestruct, &sc->sc_node) != 0) { + UBT_ALERT(sc, "could not create Netgraph node\n"); + return (ENXIO); + } + + /* Name Netgraph node */ + if (ng_name_node(sc->sc_node, device_get_nameunit(dev)) != 0) { + UBT_ALERT(sc, "could not name Netgraph node\n"); + NG_NODE_UNREF(sc->sc_node); + return (ENXIO); + } + NG_NODE_SET_PRIVATE(sc->sc_node, sc); + NG_NODE_FORCE_WRITER(sc->sc_node); + + /* + * Initialize device softc structure + */ + + /* initialize locks */ + mtx_init(&sc->sc_ng_mtx, "ubt ng", NULL, MTX_DEF); + mtx_init(&sc->sc_if_mtx, "ubt if", NULL, MTX_DEF | MTX_RECURSE); + + /* initialize packet queues */ + NG_BT_MBUFQ_INIT(&sc->sc_cmdq, UBT_DEFAULT_QLEN); + NG_BT_MBUFQ_INIT(&sc->sc_aclq, UBT_DEFAULT_QLEN); + NG_BT_MBUFQ_INIT(&sc->sc_scoq, UBT_DEFAULT_QLEN); + + /* initialize glue task */ + TASK_INIT(&sc->sc_task, 0, ubt_task, sc); + + /* + * Configure Bluetooth USB device. Discover all required USB + * interfaces and endpoints. + * + * USB device must present two interfaces: + * 1) Interface 0 that has 3 endpoints + * 1) Interrupt endpoint to receive HCI events + * 2) Bulk IN endpoint to receive ACL data + * 3) Bulk OUT endpoint to send ACL data + * + * 2) Interface 1 then has 2 endpoints + * 1) Isochronous IN endpoint to receive SCO data + * 2) Isochronous OUT endpoint to send SCO data + * + * Interface 1 (with isochronous endpoints) has several alternate + * configurations with different packet size. + */ + + /* + * For interface #1 search alternate settings, and find + * the descriptor with the largest wMaxPacketSize + */ + + wMaxPacketSize = 0; + alt_index = 0; + i = 0; + j = 0; + + /* Search through all the descriptors looking for bidir mode */ + while (1) { + uint16_t temp; + + ed = usb2_find_edesc(usb2_get_config_descriptor(uaa->device), + 1, i, j); + if (ed == NULL) { + if (j != 0) { + /* next interface */ + j = 0; + i ++; + continue; + } + + break; /* end of interfaces */ + } + + temp = UGETW(ed->wMaxPacketSize); + if (temp > wMaxPacketSize) { + wMaxPacketSize = temp; + alt_index = i; + } + + j ++; + } + + /* Set alt configuration on interface #1 only if we found it */ + if (wMaxPacketSize > 0 && + usb2_set_alt_interface_index(uaa->device, 1, alt_index)) { + UBT_ALERT(sc, "could not set alternate setting %d " \ + "for interface 1!\n", alt_index); + goto detach; + } + + /* Setup transfers for both interfaces */ + if (usb2_transfer_setup(uaa->device, iface_index, sc->sc_xfer, + ubt_config, UBT_N_TRANSFER, sc, &sc->sc_if_mtx)) { + UBT_ALERT(sc, "could not allocate transfers\n"); + goto detach; + } + + /* Claim all interfaces on the device */ + for (i = 1; usb2_get_iface(uaa->device, i) != NULL; i ++) + usb2_set_parent_iface(uaa->device, i, uaa->info.bIfaceIndex); + + return (0); /* success */ + +detach: + ubt_detach(dev); + + return (ENXIO); +} /* ubt_attach */ + +/* + * Detach the device. + * USB context. + */ + +int +ubt_detach(device_t dev) +{ + struct ubt_softc *sc = device_get_softc(dev); + node_p node = sc->sc_node; + + /* Destroy Netgraph node */ + if (node != NULL) { + sc->sc_node = NULL; + NG_NODE_REALLY_DIE(node); + ng_rmnode_self(node); + } + + /* Make sure ubt_task in gone */ + taskqueue_drain(taskqueue_swi, &sc->sc_task); + + /* Free USB transfers, if any */ + usb2_transfer_unsetup(sc->sc_xfer, UBT_N_TRANSFER); + + /* Destroy queues */ + UBT_NG_LOCK(sc); + NG_BT_MBUFQ_DESTROY(&sc->sc_cmdq); + NG_BT_MBUFQ_DESTROY(&sc->sc_aclq); + NG_BT_MBUFQ_DESTROY(&sc->sc_scoq); + UBT_NG_UNLOCK(sc); + + mtx_destroy(&sc->sc_if_mtx); + mtx_destroy(&sc->sc_ng_mtx); + + return (0); +} /* ubt_detach */ + +/* + * Called when outgoing control request (HCI command) has completed, i.e. + * HCI command was sent to the device. + * USB context. + */ + +static void +ubt_ctrl_write_callback(struct usb2_xfer *xfer) +{ + struct ubt_softc *sc = xfer->priv_sc; + struct usb2_device_request req; + struct mbuf *m; + + switch (USB_GET_STATE(xfer)) { + case USB_ST_TRANSFERRED: + UBT_INFO(sc, "sent %d bytes to control pipe\n", xfer->actlen); + UBT_STAT_BYTES_SENT(sc, xfer->actlen); + UBT_STAT_PCKTS_SENT(sc); + /* FALLTHROUGH */ + + case USB_ST_SETUP: +send_next: + /* Get next command mbuf, if any */ + UBT_NG_LOCK(sc); + NG_BT_MBUFQ_DEQUEUE(&sc->sc_cmdq, m); + UBT_NG_UNLOCK(sc); + + if (m == NULL) { + UBT_INFO(sc, "HCI command queue is empty\n"); + break; /* transfer complete */ + } + + /* Initialize a USB control request and then schedule it */ + bzero(&req, sizeof(req)); + req.bmRequestType = UBT_HCI_REQUEST; + USETW(req.wLength, m->m_pkthdr.len); + + UBT_INFO(sc, "Sending control request, " \ + "bmRequestType=0x%02x, wLength=%d\n", + req.bmRequestType, UGETW(req.wLength)); + + usb2_copy_in(xfer->frbuffers, 0, &req, sizeof(req)); + usb2_m_copy_in(xfer->frbuffers + 1, 0, m, 0, m->m_pkthdr.len); + + xfer->frlengths[0] = sizeof(req); + xfer->frlengths[1] = m->m_pkthdr.len; + xfer->nframes = 2; + + NG_FREE_M(m); + + usb2_start_hardware(xfer); + break; + + default: /* Error */ + if (xfer->error != USB_ERR_CANCELLED) { + UBT_WARN(sc, "control transfer failed: %s\n", + usb2_errstr(xfer->error)); + + UBT_STAT_OERROR(sc); + goto send_next; + } + + /* transfer cancelled */ + break; + } +} /* ubt_ctrl_write_callback */ + +/* + * Called when incoming interrupt transfer (HCI event) has completed, i.e. + * HCI event was received from the device. + * USB context. + */ + +static void +ubt_intr_read_callback(struct usb2_xfer *xfer) +{ + struct ubt_softc *sc = xfer->priv_sc; + struct mbuf *m; + ng_hci_event_pkt_t *hdr; + + m = NULL; + + switch (USB_GET_STATE(xfer)) { + case USB_ST_TRANSFERRED: + /* Allocate a new mbuf */ + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m == NULL) { + UBT_STAT_IERROR(sc); + goto submit_next; + } + + MCLGET(m, M_DONTWAIT); + if (!(m->m_flags & M_EXT)) { + UBT_STAT_IERROR(sc); + goto submit_next; + } + + /* Add HCI packet type */ + *mtod(m, uint8_t *)= NG_HCI_EVENT_PKT; + m->m_pkthdr.len = m->m_len = 1; + + if (xfer->actlen > MCLBYTES - 1) + xfer->actlen = MCLBYTES - 1; + + usb2_copy_out(xfer->frbuffers, 0, mtod(m, uint8_t *) + 1, + xfer->actlen); + m->m_pkthdr.len += xfer->actlen; + m->m_len += xfer->actlen; + + UBT_INFO(sc, "got %d bytes from interrupt pipe\n", + xfer->actlen); + + /* Validate packet and send it up the stack */ + if (m->m_pkthdr.len < sizeof(*hdr)) { + UBT_INFO(sc, "HCI event packet is too short\n"); + + UBT_STAT_IERROR(sc); + goto submit_next; + } + + hdr = mtod(m, ng_hci_event_pkt_t *); + if (hdr->length != (m->m_pkthdr.len - sizeof(*hdr))) { + UBT_ERR(sc, "Invalid HCI event packet size, " \ + "length=%d, pktlen=%d\n", + hdr->length, m->m_pkthdr.len); + + UBT_STAT_IERROR(sc); + goto submit_next; + } + + UBT_INFO(sc, "got complete HCI event frame, pktlen=%d, " \ + "length=%d\n", m->m_pkthdr.len, hdr->length); + + UBT_STAT_PCKTS_RECV(sc); + UBT_STAT_BYTES_RECV(sc, m->m_pkthdr.len); + + ubt_fwd_mbuf_up(sc, &m); + /* m == NULL at this point */ + /* FALLTHROUGH */ + + case USB_ST_SETUP: +submit_next: + NG_FREE_M(m); /* checks for m != NULL */ + + xfer->frlengths[0] = xfer->max_data_length; + usb2_start_hardware(xfer); + break; + + default: /* Error */ + if (xfer->error != USB_ERR_CANCELLED) { + UBT_WARN(sc, "interrupt transfer failed: %s\n", + usb2_errstr(xfer->error)); + + /* Try to clear stall first */ + xfer->flags.stall_pipe = 1; + goto submit_next; + } + /* transfer cancelled */ + break; + } +} /* ubt_intr_read_callback */ + +/* + * Called when incoming bulk transfer (ACL packet) has completed, i.e. + * ACL packet was received from the device. + * USB context. + */ + +static void +ubt_bulk_read_callback(struct usb2_xfer *xfer) +{ + struct ubt_softc *sc = xfer->priv_sc; + struct mbuf *m; + ng_hci_acldata_pkt_t *hdr; + uint16_t len; + + m = NULL; + + switch (USB_GET_STATE(xfer)) { + case USB_ST_TRANSFERRED: + /* Allocate new mbuf */ + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m == NULL) { + UBT_STAT_IERROR(sc); + goto submit_next; + } + + MCLGET(m, M_DONTWAIT); + if (!(m->m_flags & M_EXT)) { + UBT_STAT_IERROR(sc); + goto submit_next; + } + + /* Add HCI packet type */ + *mtod(m, uint8_t *)= NG_HCI_ACL_DATA_PKT; + m->m_pkthdr.len = m->m_len = 1; + + if (xfer->actlen > MCLBYTES - 1) + xfer->actlen = MCLBYTES - 1; + + usb2_copy_out(xfer->frbuffers, 0, mtod(m, uint8_t *) + 1, + xfer->actlen); + m->m_pkthdr.len += xfer->actlen; + m->m_len += xfer->actlen; + + UBT_INFO(sc, "got %d bytes from bulk-in pipe\n", + xfer->actlen); + + /* Validate packet and send it up the stack */ + if (m->m_pkthdr.len < sizeof(*hdr)) { + UBT_INFO(sc, "HCI ACL packet is too short\n"); + + UBT_STAT_IERROR(sc); + goto submit_next; + } + + hdr = mtod(m, ng_hci_acldata_pkt_t *); + len = le16toh(hdr->length); + if (len != (m->m_pkthdr.len - sizeof(*hdr))) { + UBT_ERR(sc, "Invalid ACL packet size, length=%d, " \ + "pktlen=%d\n", len, m->m_pkthdr.len); + + UBT_STAT_IERROR(sc); + goto submit_next; + } + + UBT_INFO(sc, "got complete ACL data packet, pktlen=%d, " \ + "length=%d\n", m->m_pkthdr.len, len); + + UBT_STAT_PCKTS_RECV(sc); + UBT_STAT_BYTES_RECV(sc, m->m_pkthdr.len); + + ubt_fwd_mbuf_up(sc, &m); + /* m == NULL at this point */ + /* FALLTHOUGH */ + + case USB_ST_SETUP: +submit_next: + NG_FREE_M(m); /* checks for m != NULL */ + + xfer->frlengths[0] = xfer->max_data_length; + usb2_start_hardware(xfer); + break; + + default: /* Error */ + if (xfer->error != USB_ERR_CANCELLED) { + UBT_WARN(sc, "bulk-in transfer failed: %s\n", + usb2_errstr(xfer->error)); + + /* Try to clear stall first */ + xfer->flags.stall_pipe = 1; + goto submit_next; + } + /* transfer cancelled */ + break; + } +} /* ubt_bulk_read_callback */ + +/* + * Called when outgoing bulk transfer (ACL packet) has completed, i.e. + * ACL packet was sent to the device. + * USB context. + */ + +static void +ubt_bulk_write_callback(struct usb2_xfer *xfer) +{ + struct ubt_softc *sc = xfer->priv_sc; + struct mbuf *m; + + switch (USB_GET_STATE(xfer)) { + case USB_ST_TRANSFERRED: + UBT_INFO(sc, "sent %d bytes to bulk-out pipe\n", xfer->actlen); + UBT_STAT_BYTES_SENT(sc, xfer->actlen); + UBT_STAT_PCKTS_SENT(sc); + /* FALLTHROUGH */ + + case USB_ST_SETUP: +send_next: + /* Get next mbuf, if any */ + UBT_NG_LOCK(sc); + NG_BT_MBUFQ_DEQUEUE(&sc->sc_aclq, m); + UBT_NG_UNLOCK(sc); + + if (m == NULL) { + UBT_INFO(sc, "ACL data queue is empty\n"); + break; /* transfer completed */ + } + + /* + * Copy ACL data frame back to a linear USB transfer buffer + * and schedule transfer + */ + + usb2_m_copy_in(xfer->frbuffers, 0, m, 0, m->m_pkthdr.len); + xfer->frlengths[0] = m->m_pkthdr.len; + + UBT_INFO(sc, "bulk-out transfer has been started, len=%d\n", + m->m_pkthdr.len); + + NG_FREE_M(m); + + usb2_start_hardware(xfer); + break; + + default: /* Error */ + if (xfer->error != USB_ERR_CANCELLED) { + UBT_WARN(sc, "bulk-out transfer failed: %s\n", + usb2_errstr(xfer->error)); + + UBT_STAT_OERROR(sc); + + /* try to clear stall first */ + xfer->flags.stall_pipe = 1; + goto send_next; + } + /* transfer cancelled */ + break; + } +} /* ubt_bulk_write_callback */ + +/* + * Called when incoming isoc transfer (SCO packet) has completed, i.e. + * SCO packet was received from the device. + * USB context. + */ + +static void +ubt_isoc_read_callback(struct usb2_xfer *xfer) +{ + struct ubt_softc *sc = xfer->priv_sc; + int n; + + switch (USB_GET_STATE(xfer)) { + case USB_ST_TRANSFERRED: + for (n = 0; n < xfer->nframes; n ++) + if (ubt_isoc_read_one_frame(xfer, n) < 0) + break; + /* FALLTHROUGH */ + + case USB_ST_SETUP: +read_next: + for (n = 0; n < xfer->nframes; n ++) + xfer->frlengths[n] = xfer->max_frame_size; + + usb2_start_hardware(xfer); + break; + + default: /* Error */ + if (xfer->error != USB_ERR_CANCELLED) { + UBT_STAT_IERROR(sc); + goto read_next; + } + + /* transfer cancelled */ + break; + } +} /* ubt_isoc_read_callback */ + +/* + * Helper function. Called from ubt_isoc_read_callback() to read + * SCO data from one frame. + * USB context. + */ + +static int +ubt_isoc_read_one_frame(struct usb2_xfer *xfer, int frame_no) +{ + struct ubt_softc *sc = xfer->priv_sc; + struct mbuf *m; + int len, want, got; + + /* Get existing SCO reassembly buffer */ + m = sc->sc_isoc_in_buffer; + sc->sc_isoc_in_buffer = NULL; + + /* While we have data in the frame */ + while ((len = xfer->frlengths[frame_no]) > 0) { + if (m == NULL) { + /* Start new reassembly buffer */ + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m == NULL) { + UBT_STAT_IERROR(sc); + return (-1); /* XXX out of sync! */ + } + + MCLGET(m, M_DONTWAIT); + if (!(m->m_flags & M_EXT)) { + UBT_STAT_IERROR(sc); + NG_FREE_M(m); + return (-1); /* XXX out of sync! */ + } + + /* Expect SCO header */ + *mtod(m, uint8_t *) = NG_HCI_SCO_DATA_PKT; + m->m_pkthdr.len = m->m_len = got = 1; + want = sizeof(ng_hci_scodata_pkt_t); + } else { + /* + * Check if we have SCO header and if so + * adjust amount of data we want + */ + got = m->m_pkthdr.len; + want = sizeof(ng_hci_scodata_pkt_t); + + if (got >= want) + want += mtod(m, ng_hci_scodata_pkt_t *)->length; + } + + /* Append frame data to the SCO reassembly buffer */ + if (got + len > want) + len = want - got; + + usb2_copy_out(xfer->frbuffers, frame_no * xfer->max_frame_size, + mtod(m, uint8_t *) + m->m_pkthdr.len, len); + + m->m_pkthdr.len += len; + m->m_len += len; + xfer->frlengths[frame_no] -= len; + + /* Check if we got everything we wanted, if not - continue */ + if (got != want) + continue; + + /* If we got here then we got complete SCO frame */ + UBT_INFO(sc, "got complete SCO data frame, pktlen=%d, " \ + "length=%d\n", m->m_pkthdr.len, + mtod(m, ng_hci_scodata_pkt_t *)->length); + + UBT_STAT_PCKTS_RECV(sc); + UBT_STAT_BYTES_RECV(sc, m->m_pkthdr.len); + + ubt_fwd_mbuf_up(sc, &m); + /* m == NULL at this point */ + } + + /* Put SCO reassembly buffer back */ + sc->sc_isoc_in_buffer = m; + + return (0); +} /* ubt_isoc_read_one_frame */ + +/* + * Called when outgoing isoc transfer (SCO packet) has completed, i.e. + * SCO packet was sent to the device. + * USB context. + */ + +static void +ubt_isoc_write_callback(struct usb2_xfer *xfer) +{ + struct ubt_softc *sc = xfer->priv_sc; + struct mbuf *m; + int n, space, offset; + + switch (USB_GET_STATE(xfer)) { + case USB_ST_TRANSFERRED: + UBT_INFO(sc, "sent %d bytes to isoc-out pipe\n", xfer->actlen); + UBT_STAT_BYTES_SENT(sc, xfer->actlen); + UBT_STAT_PCKTS_SENT(sc); + /* FALLTHROUGH */ + + case USB_ST_SETUP: +send_next: + offset = 0; + space = xfer->max_frame_size * xfer->nframes; + m = NULL; + + while (space > 0) { + if (m == NULL) { + UBT_NG_LOCK(sc); + NG_BT_MBUFQ_DEQUEUE(&sc->sc_scoq, m); + UBT_NG_UNLOCK(sc); + + if (m == NULL) + break; + } + + n = min(space, m->m_pkthdr.len); + if (n > 0) { + usb2_m_copy_in(xfer->frbuffers, offset, m,0, n); + m_adj(m, n); + + offset += n; + space -= n; + } + + if (m->m_pkthdr.len == 0) + NG_FREE_M(m); /* sets m = NULL */ + } + + /* Put whatever is left from mbuf back on queue */ + if (m != NULL) { + UBT_NG_LOCK(sc); + NG_BT_MBUFQ_PREPEND(&sc->sc_scoq, m); + UBT_NG_UNLOCK(sc); + } + + /* + * Calculate sizes for isoc frames. + * Note that offset could be 0 at this point (i.e. we have + * nothing to send). That is fine, as we have isoc. transfers + * going in both directions all the time. In this case it + * would be just empty isoc. transfer. + */ + + for (n = 0; n < xfer->nframes; n ++) { + xfer->frlengths[n] = min(offset, xfer->max_frame_size); + offset -= xfer->frlengths[n]; + } + + usb2_start_hardware(xfer); + break; + + default: /* Error */ + if (xfer->error != USB_ERR_CANCELLED) { + UBT_STAT_OERROR(sc); + goto send_next; + } + + /* transfer cancelled */ + break; + } +} + +/* + * Utility function to forward provided mbuf upstream (i.e. up the stack). + * Modifies value of the mbuf pointer (sets it to NULL). + * Save to call from any context. + */ + +static int +ubt_fwd_mbuf_up(ubt_softc_p sc, struct mbuf **m) +{ + hook_p hook; + int error; + + /* + * Close the race with Netgraph hook newhook/disconnect methods. + * Save the hook pointer atomically. Two cases are possible: + * + * 1) The hook pointer is NULL. It means disconnect method got + * there first. In this case we are done. + * + * 2) The hook pointer is not NULL. It means that hook pointer + * could be either in valid or invalid (i.e. in the process + * of disconnect) state. In any case grab an extra reference + * to protect the hook pointer. + * + * It is ok to pass hook in invalid state to NG_SEND_DATA_ONLY() as + * it checks for it. Drop extra reference after NG_SEND_DATA_ONLY(). + */ + + UBT_NG_LOCK(sc); + if ((hook = sc->sc_hook) != NULL) + NG_HOOK_REF(hook); + UBT_NG_UNLOCK(sc); + + if (hook == NULL) { + NG_FREE_M(*m); + return (ENETDOWN); + } + + NG_SEND_DATA_ONLY(error, hook, *m); + NG_HOOK_UNREF(hook); + + if (error != 0) + UBT_STAT_IERROR(sc); + + return (error); +} /* ubt_fwd_mbuf_up */ + +/**************************************************************************** + **************************************************************************** + ** Glue + **************************************************************************** + ****************************************************************************/ + +/* + * Schedule glue task. Should be called with sc_ng_mtx held. + * Netgraph context. + */ + +static void +ubt_task_schedule(ubt_softc_p sc, int action) +{ + mtx_assert(&sc->sc_ng_mtx, MA_OWNED); + + /* + * Try to handle corner case when "start all" and "stop all" + * actions can both be set before task is executed. + * + * The rules are + * + * sc_task_flags action new sc_task_flags + * ------------------------------------------------------ + * 0 start start + * 0 stop stop + * start start start + * start stop stop + * stop start stop|start + * stop stop stop + * stop|start start stop|start + * stop|start stop stop + */ + + if (action != 0) { + if ((action & UBT_FLAG_T_STOP_ALL) != 0) + sc->sc_task_flags &= ~UBT_FLAG_T_START_ALL; + + sc->sc_task_flags |= action; + } + + if (sc->sc_task_flags & UBT_FLAG_T_PENDING) + return; + + if (taskqueue_enqueue(taskqueue_swi, &sc->sc_task) == 0) { + sc->sc_task_flags |= UBT_FLAG_T_PENDING; + return; + } + + /* XXX: i think this should never happen */ +} /* ubt_task_schedule */ + +/* + * Glue task. Examines sc_task_flags and does things depending on it. + * Taskqueue context. + */ + +static void +ubt_task(void *context, int pending) +{ + ubt_softc_p sc = context; + int task_flags, i; + + UBT_NG_LOCK(sc); + task_flags = sc->sc_task_flags; + sc->sc_task_flags = 0; + UBT_NG_UNLOCK(sc); + + /* + * Stop all USB transfers synchronously. + * Stop interface #0 and #1 transfers at the same time and in the + * same loop. usb2_transfer_drain() will do appropriate locking. + */ + + if (task_flags & UBT_FLAG_T_STOP_ALL) + for (i = 0; i < UBT_N_TRANSFER; i ++) + usb2_transfer_drain(sc->sc_xfer[i]); + + /* Start incoming interrupt and bulk, and all isoc. USB transfers */ + if (task_flags & UBT_FLAG_T_START_ALL) { + /* + * Interface #0 + */ + + mtx_lock(&sc->sc_if_mtx); + + ubt_xfer_start(sc, UBT_IF_0_INTR_DT_RD); + ubt_xfer_start(sc, UBT_IF_0_BULK_DT_RD); + + /* + * Interface #1 + * Start both read and write isoc. transfers by default. + * Get them going all the time even if we have nothing + * to send to avoid any delays. + */ + + ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_RD1); + ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_RD2); + ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_WR1); + ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_WR2); + + mtx_unlock(&sc->sc_if_mtx); + } + + /* Start outgoing control transfer */ + if (task_flags & UBT_FLAG_T_START_CTRL) { + mtx_lock(&sc->sc_if_mtx); + ubt_xfer_start(sc, UBT_IF_0_CTRL_DT_WR); + mtx_unlock(&sc->sc_if_mtx); + } + + /* Start outgoing bulk transfer */ + if (task_flags & UBT_FLAG_T_START_BULK) { + mtx_lock(&sc->sc_if_mtx); + ubt_xfer_start(sc, UBT_IF_0_BULK_DT_WR); + mtx_unlock(&sc->sc_if_mtx); + } +} /* ubt_task */ + +/**************************************************************************** + **************************************************************************** + ** Netgraph specific + **************************************************************************** + ****************************************************************************/ + +/* + * Netgraph node constructor. Do not allow to create node of this type. + * Netgraph context. + */ + +static int +ng_ubt_constructor(node_p node) +{ + return (EINVAL); +} /* ng_ubt_constructor */ + +/* + * Netgraph node destructor. Destroy node only when device has been detached. + * Netgraph context. + */ + +static int +ng_ubt_shutdown(node_p node) +{ + if (node->nd_flags & NGF_REALLY_DIE) { + /* + * We came here because the USB device is being + * detached, so stop being persistant. + */ + NG_NODE_SET_PRIVATE(node, NULL); + NG_NODE_UNREF(node); + } else + NG_NODE_REVIVE(node); /* tell ng_rmnode we are persisant */ + + return (0); +} /* ng_ubt_shutdown */ + +/* + * Create new hook. There can only be one. + * Netgraph context. + */ + +static int +ng_ubt_newhook(node_p node, hook_p hook, char const *name) +{ + struct ubt_softc *sc = NG_NODE_PRIVATE(node); + + if (strcmp(name, NG_UBT_HOOK) != 0) + return (EINVAL); + + UBT_NG_LOCK(sc); + if (sc->sc_hook != NULL) { + UBT_NG_UNLOCK(sc); + + return (EISCONN); + } + + sc->sc_hook = hook; + UBT_NG_UNLOCK(sc); + + return (0); +} /* ng_ubt_newhook */ + +/* + * Connect hook. Start incoming USB transfers. + * Netgraph context. + */ + +static int +ng_ubt_connect(hook_p hook) +{ + struct ubt_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); + + NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); + + UBT_NG_LOCK(sc); + ubt_task_schedule(sc, UBT_FLAG_T_START_ALL); + UBT_NG_UNLOCK(sc); + + return (0); +} /* ng_ubt_connect */ + +/* + * Disconnect hook. + * Netgraph context. + */ + +static int +ng_ubt_disconnect(hook_p hook) +{ + struct ubt_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); + + UBT_NG_LOCK(sc); + + if (hook != sc->sc_hook) { + UBT_NG_UNLOCK(sc); + + return (EINVAL); + } + + sc->sc_hook = NULL; + + /* Kick off task to stop all USB xfers */ + ubt_task_schedule(sc, UBT_FLAG_T_STOP_ALL); + + /* Drain queues */ + NG_BT_MBUFQ_DRAIN(&sc->sc_cmdq); + NG_BT_MBUFQ_DRAIN(&sc->sc_aclq); + NG_BT_MBUFQ_DRAIN(&sc->sc_scoq); + + UBT_NG_UNLOCK(sc); + + return (0); +} /* ng_ubt_disconnect */ + +/* + * Process control message. + * Netgraph context. + */ + +static int +ng_ubt_rcvmsg(node_p node, item_p item, hook_p lasthook) +{ + struct ubt_softc *sc = NG_NODE_PRIVATE(node); + struct ng_mesg *msg, *rsp = NULL; + struct ng_bt_mbufq *q; + int error = 0, queue, qlen; + + NGI_GET_MSG(item, msg); + + switch (msg->header.typecookie) { + case NGM_GENERIC_COOKIE: + switch (msg->header.cmd) { + case NGM_TEXT_STATUS: + NG_MKRESPONSE(rsp, msg, NG_TEXTRESPONSE, M_NOWAIT); + if (rsp == NULL) { + error = ENOMEM; + break; + } + + snprintf(rsp->data, NG_TEXTRESPONSE, + "Hook: %s\n" \ + "Task flags: %#x\n" \ + "Debug: %d\n" \ + "CMD queue: [have:%d,max:%d]\n" \ + "ACL queue: [have:%d,max:%d]\n" \ + "SCO queue: [have:%d,max:%d]", + (sc->sc_hook != NULL) ? NG_UBT_HOOK : "", + sc->sc_task_flags, + sc->sc_debug, + sc->sc_cmdq.len, + sc->sc_cmdq.maxlen, + sc->sc_aclq.len, + sc->sc_aclq.maxlen, + sc->sc_scoq.len, + sc->sc_scoq.maxlen); + break; + + default: + error = EINVAL; + break; + } + break; + + case NGM_UBT_COOKIE: + switch (msg->header.cmd) { + case NGM_UBT_NODE_SET_DEBUG: + if (msg->header.arglen != sizeof(ng_ubt_node_debug_ep)){ + error = EMSGSIZE; + break; + } + + sc->sc_debug = *((ng_ubt_node_debug_ep *) (msg->data)); + break; + + case NGM_UBT_NODE_GET_DEBUG: + NG_MKRESPONSE(rsp, msg, sizeof(ng_ubt_node_debug_ep), + M_NOWAIT); + if (rsp == NULL) { + error = ENOMEM; + break; + } + + *((ng_ubt_node_debug_ep *) (rsp->data)) = sc->sc_debug; + break; + + case NGM_UBT_NODE_SET_QLEN: + if (msg->header.arglen != sizeof(ng_ubt_node_qlen_ep)) { + error = EMSGSIZE; + break; + } + + queue = ((ng_ubt_node_qlen_ep *) (msg->data))->queue; + qlen = ((ng_ubt_node_qlen_ep *) (msg->data))->qlen; + + switch (queue) { + case NGM_UBT_NODE_QUEUE_CMD: + q = &sc->sc_cmdq; + break; + + case NGM_UBT_NODE_QUEUE_ACL: + q = &sc->sc_aclq; + break; + + case NGM_UBT_NODE_QUEUE_SCO: + q = &sc->sc_scoq; + break; + + default: + error = EINVAL; + goto done; + /* NOT REACHED */ + } + + q->maxlen = qlen; + break; + + case NGM_UBT_NODE_GET_QLEN: + if (msg->header.arglen != sizeof(ng_ubt_node_qlen_ep)) { + error = EMSGSIZE; + break; + } + + queue = ((ng_ubt_node_qlen_ep *) (msg->data))->queue; + + switch (queue) { + case NGM_UBT_NODE_QUEUE_CMD: + q = &sc->sc_cmdq; + break; + + case NGM_UBT_NODE_QUEUE_ACL: + q = &sc->sc_aclq; + break; + + case NGM_UBT_NODE_QUEUE_SCO: + q = &sc->sc_scoq; + break; + + default: + error = EINVAL; + goto done; + /* NOT REACHED */ + } + + NG_MKRESPONSE(rsp, msg, sizeof(ng_ubt_node_qlen_ep), + M_NOWAIT); + if (rsp == NULL) { + error = ENOMEM; + break; + } + + ((ng_ubt_node_qlen_ep *) (rsp->data))->queue = queue; + ((ng_ubt_node_qlen_ep *) (rsp->data))->qlen = q->maxlen; + break; + + case NGM_UBT_NODE_GET_STAT: + NG_MKRESPONSE(rsp, msg, sizeof(ng_ubt_node_stat_ep), + M_NOWAIT); + if (rsp == NULL) { + error = ENOMEM; + break; + } + + bcopy(&sc->sc_stat, rsp->data, + sizeof(ng_ubt_node_stat_ep)); + break; + + case NGM_UBT_NODE_RESET_STAT: + UBT_STAT_RESET(sc); + break; + + default: + error = EINVAL; + break; + } + break; + + default: + error = EINVAL; + break; + } +done: + NG_RESPOND_MSG(error, node, item, rsp); + NG_FREE_MSG(msg); + + return (error); +} /* ng_ubt_rcvmsg */ + +/* + * Process data. + * Netgraph context. + */ + +static int +ng_ubt_rcvdata(hook_p hook, item_p item) +{ + struct ubt_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); + struct mbuf *m; + struct ng_bt_mbufq *q; + int action, error = 0; + + if (hook != sc->sc_hook) { + error = EINVAL; + goto done; + } + + /* Deatch mbuf and get HCI frame type */ + NGI_GET_M(item, m); + + /* + * Minimal size of the HCI frame is 4 bytes: 1 byte frame type, + * 2 bytes connection handle and at least 1 byte of length. + * Panic on data frame that has size smaller than 4 bytes (it + * should not happen) + */ + + if (m->m_pkthdr.len < 4) + panic("HCI frame size is too small! pktlen=%d\n", + m->m_pkthdr.len); + + /* Process HCI frame */ + switch (*mtod(m, uint8_t *)) { /* XXX call m_pullup ? */ + case NG_HCI_CMD_PKT: + if (m->m_pkthdr.len - 1 > UBT_CTRL_BUFFER_SIZE) + panic("HCI command frame size is too big! " \ + "buffer size=%zd, packet len=%d\n", + UBT_CTRL_BUFFER_SIZE, m->m_pkthdr.len); + + q = &sc->sc_cmdq; + action = UBT_FLAG_T_START_CTRL; + break; + + case NG_HCI_ACL_DATA_PKT: + if (m->m_pkthdr.len - 1 > UBT_BULK_WRITE_BUFFER_SIZE) + panic("ACL data frame size is too big! " \ + "buffer size=%d, packet len=%d\n", + UBT_BULK_WRITE_BUFFER_SIZE, m->m_pkthdr.len); + + q = &sc->sc_aclq; + action = UBT_FLAG_T_START_BULK; + break; + + case NG_HCI_SCO_DATA_PKT: + q = &sc->sc_scoq; + action = 0; + break; + + default: + UBT_ERR(sc, "Dropping unsupported HCI frame, type=0x%02x, " \ + "pktlen=%d\n", *mtod(m, uint8_t *), m->m_pkthdr.len); + + NG_FREE_M(m); + error = EINVAL; + goto done; + /* NOT REACHED */ + } + + UBT_NG_LOCK(sc); + if (NG_BT_MBUFQ_FULL(q)) { + NG_BT_MBUFQ_DROP(q); + UBT_NG_UNLOCK(sc); + + UBT_ERR(sc, "Dropping HCI frame 0x%02x, len=%d. Queue full\n", + *mtod(m, uint8_t *), m->m_pkthdr.len); + + NG_FREE_M(m); + } else { + /* Loose HCI packet type, enqueue mbuf and kick off task */ + m_adj(m, sizeof(uint8_t)); + NG_BT_MBUFQ_ENQUEUE(q, m); + ubt_task_schedule(sc, action); + UBT_NG_UNLOCK(sc); + } +done: + NG_FREE_ITEM(item); + + return (error); +} /* ng_ubt_rcvdata */ + +/**************************************************************************** + **************************************************************************** + ** Module + **************************************************************************** + ****************************************************************************/ + +/* + * Load/Unload the driver module + */ + +static int +ubt_modevent(module_t mod, int event, void *data) +{ + int error; + + switch (event) { + case MOD_LOAD: + error = ng_newtype(&typestruct); + if (error != 0) + printf("%s: Could not register Netgraph node type, " \ + "error=%d\n", NG_UBT_NODE_TYPE, error); + break; + + case MOD_UNLOAD: + error = ng_rmtype(&typestruct); + break; + + default: + error = EOPNOTSUPP; + break; + } + + return (error); +} /* ubt_modevent */ + +static devclass_t ubt_devclass; + +static device_method_t ubt_methods[] = +{ + DEVMETHOD(device_probe, ubt_probe), + DEVMETHOD(device_attach, ubt_attach), + DEVMETHOD(device_detach, ubt_detach), + { 0, 0 } +}; + +static driver_t ubt_driver = +{ + .name = "ubt", + .methods = ubt_methods, + .size = sizeof(struct ubt_softc), +}; + +DRIVER_MODULE(ng_ubt, ushub, ubt_driver, ubt_devclass, ubt_modevent, 0); +MODULE_VERSION(ng_ubt, NG_BLUETOOTH_VERSION); +MODULE_DEPEND(ng_ubt, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION); +MODULE_DEPEND(ng_ubt, ng_hci, NG_BLUETOOTH_VERSION, NG_BLUETOOTH_VERSION, NG_BLUETOOTH_VERSION); +MODULE_DEPEND(ng_ubt, usb, 1, 1, 1); + |