| Current Path : /sys/netgraph/bluetooth/drivers/ubt/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c |
/*
* 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: release/9.1.0/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c 235000 2012-05-04 15:05:30Z hselasky $
*/
/*
* 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 <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include "usbdevs.h"
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#define USB_DEBUG_VAR usb_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_busdma.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 <netgraph/bluetooth/drivers/ubt/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) usbd_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 usb_callback_t ubt_ctrl_write_callback;
static usb_callback_t ubt_intr_read_callback;
static usb_callback_t ubt_bulk_read_callback;
static usb_callback_t ubt_bulk_write_callback;
static usb_callback_t ubt_isoc_read_callback;
static usb_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 usb_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 usb_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,
.bufsize = UBT_BULK_WRITE_BUFFER_SIZE,
.flags = { .pipe_bof = 1, .force_short_xfer = 1, },
.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,
.bufsize = UBT_BULK_READ_BUFFER_SIZE,
.flags = { .pipe_bof = 1, .short_xfer_ok = 1, },
.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,
.flags = { .pipe_bof = 1, .short_xfer_ok = 1, },
.bufsize = UBT_INTR_BUFFER_SIZE,
.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,
.bufsize = UBT_CTRL_BUFFER_SIZE,
.callback = &ubt_ctrl_write_callback,
.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,
.bufsize = 0, /* use "wMaxPacketSize * frames" */
.frames = UBT_ISOC_NFRAMES,
.flags = { .short_xfer_ok = 1, },
.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,
.bufsize = 0, /* use "wMaxPacketSize * frames" */
.frames = UBT_ISOC_NFRAMES,
.flags = { .short_xfer_ok = 1, },
.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,
.bufsize = 0, /* use "wMaxPacketSize * frames" */
.frames = UBT_ISOC_NFRAMES,
.flags = { .short_xfer_ok = 1, },
.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,
.bufsize = 0, /* use "wMaxPacketSize * frames" */
.frames = UBT_ISOC_NFRAMES,
.flags = { .short_xfer_ok = 1, },
.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_USB_HOST_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_USB_HOST_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 usb_attach_arg *uaa = device_get_ivars(dev);
int error;
if (uaa->usb_mode != USB_MODE_HOST)
return (ENXIO);
if (uaa->info.bIfaceIndex != 0)
return (ENXIO);
if (usbd_lookup_id_by_uaa(ubt_ignore_devs,
sizeof(ubt_ignore_devs), uaa) == 0)
return (ENXIO);
error = usbd_lookup_id_by_uaa(ubt_devs, sizeof(ubt_devs), uaa);
if (error == 0)
return (BUS_PROBE_GENERIC);
return (error);
} /* ubt_probe */
/*
* Attach the device.
* USB context.
*/
static int
ubt_attach(device_t dev)
{
struct usb_attach_arg *uaa = device_get_ivars(dev);
struct ubt_softc *sc = device_get_softc(dev);
struct usb_endpoint_descriptor *ed;
struct usb_interface_descriptor *id;
uint16_t wMaxPacketSize;
uint8_t alt_index, i, j;
uint8_t iface_index[2] = { 0, 1 };
device_set_usb_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;
ed = NULL;
/*
* Search through all the descriptors looking for the largest
* packet size:
*/
while ((ed = (struct usb_endpoint_descriptor *)usb_desc_foreach(
usbd_get_config_descriptor(uaa->device),
(struct usb_descriptor *)ed))) {
if ((ed->bDescriptorType == UDESC_INTERFACE) &&
(ed->bLength >= sizeof(*id))) {
id = (struct usb_interface_descriptor *)ed;
i = id->bInterfaceNumber;
j = id->bAlternateSetting;
}
if ((ed->bDescriptorType == UDESC_ENDPOINT) &&
(ed->bLength >= sizeof(*ed)) &&
(i == 1)) {
uint16_t temp;
temp = UGETW(ed->wMaxPacketSize);
if (temp > wMaxPacketSize) {
wMaxPacketSize = temp;
alt_index = j;
}
}
}
/* Set alt configuration on interface #1 only if we found it */
if (wMaxPacketSize > 0 &&
usbd_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 (usbd_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; usbd_get_iface(uaa->device, i) != NULL; i ++)
usbd_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 */
usbd_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 usb_xfer *xfer, usb_error_t error)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
struct usb_device_request req;
struct mbuf *m;
struct usb_page_cache *pc;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
UBT_INFO(sc, "sent %d bytes to control pipe\n", actlen);
UBT_STAT_BYTES_SENT(sc, 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));
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_in(pc, 0, &req, sizeof(req));
pc = usbd_xfer_get_frame(xfer, 1);
usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len);
usbd_xfer_set_frame_len(xfer, 0, sizeof(req));
usbd_xfer_set_frame_len(xfer, 1, m->m_pkthdr.len);
usbd_xfer_set_frames(xfer, 2);
NG_FREE_M(m);
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
UBT_WARN(sc, "control transfer failed: %s\n",
usbd_errstr(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 usb_xfer *xfer, usb_error_t error)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
struct mbuf *m;
ng_hci_event_pkt_t *hdr;
struct usb_page_cache *pc;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
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 (actlen > MCLBYTES - 1)
actlen = MCLBYTES - 1;
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_out(pc, 0, mtod(m, uint8_t *) + 1, actlen);
m->m_pkthdr.len += actlen;
m->m_len += actlen;
UBT_INFO(sc, "got %d bytes from interrupt pipe\n",
actlen);
/* Validate packet and send it up the stack */
if (m->m_pkthdr.len < (int)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 */
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
UBT_WARN(sc, "interrupt transfer failed: %s\n",
usbd_errstr(error));
/* Try to clear stall first */
usbd_xfer_set_stall(xfer);
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 usb_xfer *xfer, usb_error_t error)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
struct mbuf *m;
ng_hci_acldata_pkt_t *hdr;
struct usb_page_cache *pc;
int len;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
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 (actlen > MCLBYTES - 1)
actlen = MCLBYTES - 1;
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_out(pc, 0, mtod(m, uint8_t *) + 1, actlen);
m->m_pkthdr.len += actlen;
m->m_len += actlen;
UBT_INFO(sc, "got %d bytes from bulk-in pipe\n",
actlen);
/* Validate packet and send it up the stack */
if (m->m_pkthdr.len < (int)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 != (int)(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 */
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
UBT_WARN(sc, "bulk-in transfer failed: %s\n",
usbd_errstr(error));
/* Try to clear stall first */
usbd_xfer_set_stall(xfer);
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 usb_xfer *xfer, usb_error_t error)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
struct mbuf *m;
struct usb_page_cache *pc;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
UBT_INFO(sc, "sent %d bytes to bulk-out pipe\n", actlen);
UBT_STAT_BYTES_SENT(sc, 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
*/
pc = usbd_xfer_get_frame(xfer, 0);
usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len);
usbd_xfer_set_frame_len(xfer, 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);
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
UBT_WARN(sc, "bulk-out transfer failed: %s\n",
usbd_errstr(error));
UBT_STAT_OERROR(sc);
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
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 usb_xfer *xfer, usb_error_t error)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
int n;
int actlen, nframes;
usbd_xfer_status(xfer, &actlen, NULL, NULL, &nframes);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
for (n = 0; n < nframes; n ++)
if (ubt_isoc_read_one_frame(xfer, n) < 0)
break;
/* FALLTHROUGH */
case USB_ST_SETUP:
read_next:
for (n = 0; n < nframes; n ++)
usbd_xfer_set_frame_len(xfer, n,
usbd_xfer_max_framelen(xfer));
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (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 usb_xfer *xfer, int frame_no)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
struct mbuf *m;
int len, want, got, total;
/* Get existing SCO reassembly buffer */
pc = usbd_xfer_get_frame(xfer, 0);
m = sc->sc_isoc_in_buffer;
total = usbd_xfer_frame_len(xfer, frame_no);
/* While we have data in the frame */
while (total > 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 */
len = total;
if (got + len > want)
len = want - got;
usbd_copy_out(pc, frame_no * usbd_xfer_max_framelen(xfer),
mtod(m, uint8_t *) + m->m_pkthdr.len, len);
m->m_pkthdr.len += len;
m->m_len += len;
total -= 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 usb_xfer *xfer, usb_error_t error)
{
struct ubt_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
struct mbuf *m;
int n, space, offset;
int actlen, nframes;
usbd_xfer_status(xfer, &actlen, NULL, NULL, &nframes);
pc = usbd_xfer_get_frame(xfer, 0);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
UBT_INFO(sc, "sent %d bytes to isoc-out pipe\n", actlen);
UBT_STAT_BYTES_SENT(sc, actlen);
UBT_STAT_PCKTS_SENT(sc);
/* FALLTHROUGH */
case USB_ST_SETUP:
send_next:
offset = 0;
space = usbd_xfer_max_framelen(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) {
usbd_m_copy_in(pc, 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 < nframes; n ++) {
usbd_xfer_set_frame_len(xfer, n,
min(offset, usbd_xfer_max_framelen(xfer)));
offset -= usbd_xfer_frame_len(xfer, n);
}
usbd_transfer_submit(xfer);
break;
default: /* Error */
if (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. usbd_transfer_drain() will do appropriate locking.
*/
if (task_flags & UBT_FLAG_T_STOP_ALL)
for (i = 0; i < UBT_N_TRANSFER; i ++)
usbd_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 > (int)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, uhub, 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);