10389423e2
These have been tested back-to-back with Linux 3.x and a similar attachment at the other end; a CDC EEM-like encapsulation can be used for emulated Ethernet over udbp(4) with ng_ether.
861 lines
21 KiB
C
861 lines
21 KiB
C
/*-
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* Copyright (c) 1996-2000 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of author nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY NICK HIBMA AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/* Driver for arbitrary double bulk pipe devices.
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* The driver assumes that there will be the same driver on the other side.
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*
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* XXX Some more information on what the framing of the IP packets looks like.
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*
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* To take full advantage of bulk transmission, packets should be chosen
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* between 1k and 5k in size (1k to make sure the sending side starts
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* streaming, and <5k to avoid overflowing the system with small TDs).
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*/
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/* probe/attach/detach:
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* Connect the driver to the hardware and netgraph
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*
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* The reason we submit a bulk in transfer is that USB does not know about
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* interrupts. The bulk transfer continuously polls the device for data.
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* While the device has no data available, the device NAKs the TDs. As soon
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* as there is data, the transfer happens and the data comes flowing in.
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*
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* In case you were wondering, interrupt transfers happen exactly that way.
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* It therefore doesn't make sense to use the interrupt pipe to signal
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* 'data ready' and then schedule a bulk transfer to fetch it. That would
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* incur a 2ms delay at least, without reducing bandwidth requirements.
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*
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*/
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdi_util.h>
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#include "usbdevs.h"
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#define USB_DEBUG_VAR udbp_debug
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#include <dev/usb/usb_debug.h>
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#include <sys/mbuf.h>
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#include <netgraph/ng_message.h>
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#include <netgraph/netgraph.h>
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#include <netgraph/ng_parse.h>
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#include <netgraph/bluetooth/include/ng_bluetooth.h>
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#include <dev/usb/misc/udbp.h>
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#ifdef USB_DEBUG
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static int udbp_debug = 0;
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static SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp");
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SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RWTUN,
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&udbp_debug, 0, "udbp debug level");
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#endif
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#define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in
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* msecs */
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#define UDBP_BUFFERSIZE MCLBYTES /* maximum number of bytes in one
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* transfer */
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#define UDBP_T_WR 0
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#define UDBP_T_RD 1
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#define UDBP_T_WR_CS 2
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#define UDBP_T_RD_CS 3
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#define UDBP_T_MAX 4
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#define UDBP_Q_MAXLEN 50
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struct udbp_softc {
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struct mtx sc_mtx;
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struct ng_bt_mbufq sc_xmitq_hipri; /* hi-priority transmit queue */
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struct ng_bt_mbufq sc_xmitq; /* low-priority transmit queue */
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struct usb_xfer *sc_xfer[UDBP_T_MAX];
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node_p sc_node; /* back pointer to node */
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hook_p sc_hook; /* pointer to the hook */
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struct mbuf *sc_bulk_in_buffer;
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uint32_t sc_packets_in; /* packets in from downstream */
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uint32_t sc_packets_out; /* packets out towards downstream */
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uint8_t sc_flags;
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#define UDBP_FLAG_READ_STALL 0x01 /* read transfer stalled */
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#define UDBP_FLAG_WRITE_STALL 0x02 /* write transfer stalled */
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uint8_t sc_name[16];
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};
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/* prototypes */
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static int udbp_modload(module_t mod, int event, void *data);
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static device_probe_t udbp_probe;
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static device_attach_t udbp_attach;
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static device_detach_t udbp_detach;
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static usb_callback_t udbp_bulk_read_callback;
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static usb_callback_t udbp_bulk_read_clear_stall_callback;
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static usb_callback_t udbp_bulk_write_callback;
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static usb_callback_t udbp_bulk_write_clear_stall_callback;
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static void udbp_bulk_read_complete(node_p, hook_p, void *, int);
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static ng_constructor_t ng_udbp_constructor;
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static ng_rcvmsg_t ng_udbp_rcvmsg;
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static ng_shutdown_t ng_udbp_rmnode;
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static ng_newhook_t ng_udbp_newhook;
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static ng_connect_t ng_udbp_connect;
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static ng_rcvdata_t ng_udbp_rcvdata;
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static ng_disconnect_t ng_udbp_disconnect;
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/* Parse type for struct ngudbpstat */
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static const struct ng_parse_struct_field
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ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO;
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static const struct ng_parse_type ng_udbp_stat_type = {
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&ng_parse_struct_type,
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&ng_udbp_stat_type_fields
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};
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/* List of commands and how to convert arguments to/from ASCII */
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static const struct ng_cmdlist ng_udbp_cmdlist[] = {
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{
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NGM_UDBP_COOKIE,
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NGM_UDBP_GET_STATUS,
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"getstatus",
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NULL,
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&ng_udbp_stat_type,
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},
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{
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NGM_UDBP_COOKIE,
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NGM_UDBP_SET_FLAG,
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"setflag",
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&ng_parse_int32_type,
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NULL
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},
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{0}
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};
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/* Netgraph node type descriptor */
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static struct ng_type ng_udbp_typestruct = {
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.version = NG_ABI_VERSION,
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.name = NG_UDBP_NODE_TYPE,
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.constructor = ng_udbp_constructor,
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.rcvmsg = ng_udbp_rcvmsg,
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.shutdown = ng_udbp_rmnode,
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.newhook = ng_udbp_newhook,
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.connect = ng_udbp_connect,
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.rcvdata = ng_udbp_rcvdata,
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.disconnect = ng_udbp_disconnect,
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.cmdlist = ng_udbp_cmdlist,
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};
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/* USB config */
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static const struct usb_config udbp_config[UDBP_T_MAX] = {
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[UDBP_T_WR] = {
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.type = UE_BULK,
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.endpoint = UE_ADDR_ANY,
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.direction = UE_DIR_OUT,
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.bufsize = UDBP_BUFFERSIZE,
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.flags = {.pipe_bof = 1,.force_short_xfer = 1,},
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.callback = &udbp_bulk_write_callback,
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.timeout = UDBP_TIMEOUT,
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},
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[UDBP_T_RD] = {
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.type = UE_BULK,
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.endpoint = UE_ADDR_ANY,
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.direction = UE_DIR_IN,
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.bufsize = UDBP_BUFFERSIZE,
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.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
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.callback = &udbp_bulk_read_callback,
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},
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[UDBP_T_WR_CS] = {
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.type = UE_CONTROL,
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.endpoint = 0x00, /* Control pipe */
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.direction = UE_DIR_ANY,
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.bufsize = sizeof(struct usb_device_request),
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.callback = &udbp_bulk_write_clear_stall_callback,
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.timeout = 1000, /* 1 second */
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.interval = 50, /* 50ms */
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},
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[UDBP_T_RD_CS] = {
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.type = UE_CONTROL,
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.endpoint = 0x00, /* Control pipe */
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.direction = UE_DIR_ANY,
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.bufsize = sizeof(struct usb_device_request),
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.callback = &udbp_bulk_read_clear_stall_callback,
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.timeout = 1000, /* 1 second */
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.interval = 50, /* 50ms */
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},
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};
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static devclass_t udbp_devclass;
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static device_method_t udbp_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, udbp_probe),
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DEVMETHOD(device_attach, udbp_attach),
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DEVMETHOD(device_detach, udbp_detach),
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DEVMETHOD_END
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};
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static driver_t udbp_driver = {
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.name = "udbp",
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.methods = udbp_methods,
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.size = sizeof(struct udbp_softc),
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};
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static const STRUCT_USB_HOST_ID udbp_devs[] = {
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{USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U258, 0)},
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{USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_TURBOCONNECT, 0)},
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{USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_GADGETZERO, 0)},
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{USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2301, 0)},
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{USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2302, 0)},
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{USB_VPI(USB_VENDOR_ANCHOR, USB_PRODUCT_ANCHOR_EZLINK, 0)},
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{USB_VPI(USB_VENDOR_GENESYS, USB_PRODUCT_GENESYS_GL620USB, 0)},
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};
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DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0);
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MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
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MODULE_DEPEND(udbp, usb, 1, 1, 1);
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MODULE_VERSION(udbp, 1);
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USB_PNP_HOST_INFO(udbp_devs);
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static int
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udbp_modload(module_t mod, int event, void *data)
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{
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int error;
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switch (event) {
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case MOD_LOAD:
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error = ng_newtype(&ng_udbp_typestruct);
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if (error != 0) {
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printf("%s: Could not register "
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"Netgraph node type, error=%d\n",
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NG_UDBP_NODE_TYPE, error);
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}
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break;
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case MOD_UNLOAD:
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error = ng_rmtype(&ng_udbp_typestruct);
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break;
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default:
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error = EOPNOTSUPP;
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break;
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}
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return (error);
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}
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static int
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udbp_probe(device_t dev)
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{
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struct usb_attach_arg *uaa = device_get_ivars(dev);
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if (uaa->usb_mode != USB_MODE_HOST)
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return (ENXIO);
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if (uaa->info.bConfigIndex != 0)
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return (ENXIO);
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if (uaa->info.bIfaceIndex != 0)
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return (ENXIO);
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return (usbd_lookup_id_by_uaa(udbp_devs, sizeof(udbp_devs), uaa));
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}
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static int
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udbp_attach(device_t dev)
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{
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struct usb_attach_arg *uaa = device_get_ivars(dev);
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struct udbp_softc *sc = device_get_softc(dev);
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int error;
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device_set_usb_desc(dev);
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snprintf(sc->sc_name, sizeof(sc->sc_name),
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"%s", device_get_nameunit(dev));
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mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE);
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error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex,
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sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx);
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if (error) {
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DPRINTF("error=%s\n", usbd_errstr(error));
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goto detach;
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}
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NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN);
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NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN);
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/* create Netgraph node */
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if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) {
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printf("%s: Could not create Netgraph node\n",
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sc->sc_name);
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sc->sc_node = NULL;
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goto detach;
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}
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/* name node */
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if (ng_name_node(sc->sc_node, sc->sc_name) != 0) {
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printf("%s: Could not name node\n",
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sc->sc_name);
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NG_NODE_UNREF(sc->sc_node);
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sc->sc_node = NULL;
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goto detach;
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}
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NG_NODE_SET_PRIVATE(sc->sc_node, sc);
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/* the device is now operational */
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return (0); /* success */
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detach:
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udbp_detach(dev);
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return (ENOMEM); /* failure */
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}
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static int
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udbp_detach(device_t dev)
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{
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struct udbp_softc *sc = device_get_softc(dev);
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/* destroy Netgraph node */
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if (sc->sc_node != NULL) {
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NG_NODE_SET_PRIVATE(sc->sc_node, NULL);
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ng_rmnode_self(sc->sc_node);
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sc->sc_node = NULL;
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}
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/* free USB transfers, if any */
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usbd_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX);
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mtx_destroy(&sc->sc_mtx);
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/* destroy queues */
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NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq);
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NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri);
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/* extra check */
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if (sc->sc_bulk_in_buffer) {
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m_freem(sc->sc_bulk_in_buffer);
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sc->sc_bulk_in_buffer = NULL;
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}
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return (0); /* success */
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}
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static void
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udbp_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
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{
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struct udbp_softc *sc = usbd_xfer_softc(xfer);
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struct usb_page_cache *pc;
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struct mbuf *m;
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int actlen;
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usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
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switch (USB_GET_STATE(xfer)) {
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case USB_ST_TRANSFERRED:
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/* allocate new mbuf */
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MGETHDR(m, M_NOWAIT, MT_DATA);
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if (m == NULL) {
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goto tr_setup;
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}
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if (!(MCLGET(m, M_NOWAIT))) {
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m_freem(m);
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goto tr_setup;
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}
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m->m_pkthdr.len = m->m_len = actlen;
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pc = usbd_xfer_get_frame(xfer, 0);
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usbd_copy_out(pc, 0, m->m_data, actlen);
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sc->sc_bulk_in_buffer = m;
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DPRINTF("received package %d bytes\n", actlen);
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case USB_ST_SETUP:
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tr_setup:
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if (sc->sc_bulk_in_buffer) {
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ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0);
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return;
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}
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if (sc->sc_flags & UDBP_FLAG_READ_STALL) {
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usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]);
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return;
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}
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usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
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usbd_transfer_submit(xfer);
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return;
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default: /* Error */
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if (error != USB_ERR_CANCELLED) {
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/* try to clear stall first */
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sc->sc_flags |= UDBP_FLAG_READ_STALL;
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usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]);
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}
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return;
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}
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}
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static void
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udbp_bulk_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
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{
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struct udbp_softc *sc = usbd_xfer_softc(xfer);
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struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD];
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if (usbd_clear_stall_callback(xfer, xfer_other)) {
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DPRINTF("stall cleared\n");
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sc->sc_flags &= ~UDBP_FLAG_READ_STALL;
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usbd_transfer_start(xfer_other);
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}
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}
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static void
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udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2)
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{
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struct udbp_softc *sc = NG_NODE_PRIVATE(node);
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struct mbuf *m;
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int error;
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if (sc == NULL) {
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return;
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}
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mtx_lock(&sc->sc_mtx);
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|
|
m = sc->sc_bulk_in_buffer;
|
|
|
|
if (m) {
|
|
|
|
sc->sc_bulk_in_buffer = NULL;
|
|
|
|
if ((sc->sc_hook == NULL) ||
|
|
NG_HOOK_NOT_VALID(sc->sc_hook)) {
|
|
DPRINTF("No upstream hook\n");
|
|
goto done;
|
|
}
|
|
sc->sc_packets_in++;
|
|
|
|
NG_SEND_DATA_ONLY(error, sc->sc_hook, m);
|
|
|
|
m = NULL;
|
|
}
|
|
done:
|
|
if (m) {
|
|
m_freem(m);
|
|
}
|
|
/* start USB bulk-in transfer, if not already started */
|
|
|
|
usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]);
|
|
|
|
mtx_unlock(&sc->sc_mtx);
|
|
}
|
|
|
|
static void
|
|
udbp_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
|
|
{
|
|
struct udbp_softc *sc = usbd_xfer_softc(xfer);
|
|
struct usb_page_cache *pc;
|
|
struct mbuf *m;
|
|
|
|
switch (USB_GET_STATE(xfer)) {
|
|
case USB_ST_TRANSFERRED:
|
|
|
|
sc->sc_packets_out++;
|
|
|
|
case USB_ST_SETUP:
|
|
if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) {
|
|
usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]);
|
|
return;
|
|
}
|
|
/* get next mbuf, if any */
|
|
|
|
NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m);
|
|
if (m == NULL) {
|
|
NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m);
|
|
if (m == NULL) {
|
|
DPRINTF("Data queue is empty\n");
|
|
return;
|
|
}
|
|
}
|
|
if (m->m_pkthdr.len > MCLBYTES) {
|
|
DPRINTF("truncating large packet "
|
|
"from %d to %d bytes\n", m->m_pkthdr.len,
|
|
MCLBYTES);
|
|
m->m_pkthdr.len = MCLBYTES;
|
|
}
|
|
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);
|
|
|
|
DPRINTF("packet out: %d bytes\n", m->m_pkthdr.len);
|
|
|
|
m_freem(m);
|
|
|
|
usbd_transfer_submit(xfer);
|
|
return;
|
|
|
|
default: /* Error */
|
|
if (error != USB_ERR_CANCELLED) {
|
|
/* try to clear stall first */
|
|
sc->sc_flags |= UDBP_FLAG_WRITE_STALL;
|
|
usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]);
|
|
}
|
|
return;
|
|
|
|
}
|
|
}
|
|
|
|
static void
|
|
udbp_bulk_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
|
|
{
|
|
struct udbp_softc *sc = usbd_xfer_softc(xfer);
|
|
struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR];
|
|
|
|
if (usbd_clear_stall_callback(xfer, xfer_other)) {
|
|
DPRINTF("stall cleared\n");
|
|
sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL;
|
|
usbd_transfer_start(xfer_other);
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* Start of Netgraph methods
|
|
**********************************************************************/
|
|
|
|
/*
|
|
* If this is a device node so this work is done in the attach()
|
|
* routine and the constructor will return EINVAL as you should not be able
|
|
* to create nodes that depend on hardware (unless you can add the hardware :)
|
|
*/
|
|
static int
|
|
ng_udbp_constructor(node_p node)
|
|
{
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Give our ok for a hook to be added...
|
|
* If we are not running this might kick a device into life.
|
|
* Possibly decode information out of the hook name.
|
|
* Add the hook's private info to the hook structure.
|
|
* (if we had some). In this example, we assume that there is a
|
|
* an array of structs, called 'channel' in the private info,
|
|
* one for each active channel. The private
|
|
* pointer of each hook points to the appropriate UDBP_hookinfo struct
|
|
* so that the source of an input packet is easily identified.
|
|
*/
|
|
static int
|
|
ng_udbp_newhook(node_p node, hook_p hook, const char *name)
|
|
{
|
|
struct udbp_softc *sc = NG_NODE_PRIVATE(node);
|
|
int32_t error = 0;
|
|
|
|
if (strcmp(name, NG_UDBP_HOOK_NAME)) {
|
|
return (EINVAL);
|
|
}
|
|
mtx_lock(&sc->sc_mtx);
|
|
|
|
if (sc->sc_hook != NULL) {
|
|
error = EISCONN;
|
|
} else {
|
|
sc->sc_hook = hook;
|
|
NG_HOOK_SET_PRIVATE(hook, NULL);
|
|
}
|
|
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get a netgraph control message.
|
|
* Check it is one we understand. If needed, send a response.
|
|
* We could save the address for an async action later, but don't here.
|
|
* Always free the message.
|
|
* The response should be in a malloc'd region that the caller can 'free'.
|
|
* A response is not required.
|
|
* Theoretically you could respond defferently to old message types if
|
|
* the cookie in the header didn't match what we consider to be current
|
|
* (so that old userland programs could continue to work).
|
|
*/
|
|
static int
|
|
ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook)
|
|
{
|
|
struct udbp_softc *sc = NG_NODE_PRIVATE(node);
|
|
struct ng_mesg *resp = NULL;
|
|
int error = 0;
|
|
struct ng_mesg *msg;
|
|
|
|
NGI_GET_MSG(item, msg);
|
|
/* Deal with message according to cookie and command */
|
|
switch (msg->header.typecookie) {
|
|
case NGM_UDBP_COOKIE:
|
|
switch (msg->header.cmd) {
|
|
case NGM_UDBP_GET_STATUS:
|
|
{
|
|
struct ngudbpstat *stats;
|
|
|
|
NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
|
|
if (!resp) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
stats = (struct ngudbpstat *)resp->data;
|
|
mtx_lock(&sc->sc_mtx);
|
|
stats->packets_in = sc->sc_packets_in;
|
|
stats->packets_out = sc->sc_packets_out;
|
|
mtx_unlock(&sc->sc_mtx);
|
|
break;
|
|
}
|
|
case NGM_UDBP_SET_FLAG:
|
|
if (msg->header.arglen != sizeof(uint32_t)) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
DPRINTF("flags = 0x%08x\n",
|
|
*((uint32_t *)msg->data));
|
|
break;
|
|
default:
|
|
error = EINVAL; /* unknown command */
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL; /* unknown cookie type */
|
|
break;
|
|
}
|
|
|
|
/* Take care of synchronous response, if any */
|
|
NG_RESPOND_MSG(error, node, item, resp);
|
|
NG_FREE_MSG(msg);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Accept data from the hook and queue it for output.
|
|
*/
|
|
static int
|
|
ng_udbp_rcvdata(hook_p hook, item_p item)
|
|
{
|
|
struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
|
|
struct ng_bt_mbufq *queue_ptr;
|
|
struct mbuf *m;
|
|
struct ng_tag_prio *ptag;
|
|
int error;
|
|
|
|
if (sc == NULL) {
|
|
NG_FREE_ITEM(item);
|
|
return (EHOSTDOWN);
|
|
}
|
|
NGI_GET_M(item, m);
|
|
NG_FREE_ITEM(item);
|
|
|
|
/*
|
|
* Now queue the data for when it can be sent
|
|
*/
|
|
ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE,
|
|
NG_TAG_PRIO, NULL);
|
|
|
|
if (ptag && (ptag->priority > NG_PRIO_CUTOFF))
|
|
queue_ptr = &sc->sc_xmitq_hipri;
|
|
else
|
|
queue_ptr = &sc->sc_xmitq;
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
|
|
if (NG_BT_MBUFQ_FULL(queue_ptr)) {
|
|
NG_BT_MBUFQ_DROP(queue_ptr);
|
|
NG_FREE_M(m);
|
|
error = ENOBUFS;
|
|
} else {
|
|
NG_BT_MBUFQ_ENQUEUE(queue_ptr, m);
|
|
/*
|
|
* start bulk-out transfer, if not already started:
|
|
*/
|
|
usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]);
|
|
error = 0;
|
|
}
|
|
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do local shutdown processing..
|
|
* We are a persistent device, we refuse to go away, and
|
|
* only remove our links and reset ourself.
|
|
*/
|
|
static int
|
|
ng_udbp_rmnode(node_p node)
|
|
{
|
|
struct udbp_softc *sc = NG_NODE_PRIVATE(node);
|
|
|
|
/* Let old node go */
|
|
NG_NODE_SET_PRIVATE(node, NULL);
|
|
NG_NODE_UNREF(node); /* forget it ever existed */
|
|
|
|
if (sc == NULL) {
|
|
goto done;
|
|
}
|
|
/* Create Netgraph node */
|
|
if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) {
|
|
printf("%s: Could not create Netgraph node\n",
|
|
sc->sc_name);
|
|
sc->sc_node = NULL;
|
|
goto done;
|
|
}
|
|
/* Name node */
|
|
if (ng_name_node(sc->sc_node, sc->sc_name) != 0) {
|
|
printf("%s: Could not name Netgraph node\n",
|
|
sc->sc_name);
|
|
NG_NODE_UNREF(sc->sc_node);
|
|
sc->sc_node = NULL;
|
|
goto done;
|
|
}
|
|
NG_NODE_SET_PRIVATE(sc->sc_node, sc);
|
|
|
|
done:
|
|
if (sc) {
|
|
mtx_unlock(&sc->sc_mtx);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This is called once we've already connected a new hook to the other node.
|
|
* It gives us a chance to balk at the last minute.
|
|
*/
|
|
static int
|
|
ng_udbp_connect(hook_p hook)
|
|
{
|
|
struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
|
|
|
|
/* probably not at splnet, force outward queueing */
|
|
NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
|
|
sc->sc_flags |= (UDBP_FLAG_READ_STALL |
|
|
UDBP_FLAG_WRITE_STALL);
|
|
|
|
/* start bulk-in transfer */
|
|
usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]);
|
|
|
|
/* start bulk-out transfer */
|
|
usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]);
|
|
|
|
mtx_unlock(&sc->sc_mtx);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Dook disconnection
|
|
*
|
|
* For this type, removal of the last link destroys the node
|
|
*/
|
|
static int
|
|
ng_udbp_disconnect(hook_p hook)
|
|
{
|
|
struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
|
|
int error = 0;
|
|
|
|
if (sc != NULL) {
|
|
|
|
mtx_lock(&sc->sc_mtx);
|
|
|
|
if (hook != sc->sc_hook) {
|
|
error = EINVAL;
|
|
} else {
|
|
|
|
/* stop bulk-in transfer */
|
|
usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]);
|
|
usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD]);
|
|
|
|
/* stop bulk-out transfer */
|
|
usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]);
|
|
usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR]);
|
|
|
|
/* cleanup queues */
|
|
NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq);
|
|
NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri);
|
|
|
|
if (sc->sc_bulk_in_buffer) {
|
|
m_freem(sc->sc_bulk_in_buffer);
|
|
sc->sc_bulk_in_buffer = NULL;
|
|
}
|
|
sc->sc_hook = NULL;
|
|
}
|
|
|
|
mtx_unlock(&sc->sc_mtx);
|
|
}
|
|
if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
|
|
&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
|
|
ng_rmnode_self(NG_HOOK_NODE(hook));
|
|
|
|
return (error);
|
|
}
|