1cb9ba5e61
make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/libcomposite.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_acm.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ss_lb.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/u_serial.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_serial.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_obex.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/u_ether.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ncm.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ecm.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_phonet.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_eem.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_ecm_subset.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_rndis.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_mass_storage.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_fs.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uac1.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uac1_legacy.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uac2.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_uvc.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_midi.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_midi2.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_hid.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_printer.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/function/usb_f_tcm.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/legacy/g_zero.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/legacy/g_midi.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/usb/gadget/legacy/g_dbgp.o Add the missing invocations of the MODULE_DESCRIPTION() macro. Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com> Link: https://lore.kernel.org/r/20240605-md-drivers-usb-gadget-v1-1-29847a46aad3@quicinc.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1803 lines
47 KiB
C
1803 lines
47 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* f_ncm.c -- USB CDC Network (NCM) link function driver
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*
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* Copyright (C) 2010 Nokia Corporation
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* Contact: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
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*
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* The driver borrows from f_ecm.c which is:
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*
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* Copyright (C) 2003-2005,2008 David Brownell
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* Copyright (C) 2008 Nokia Corporation
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*/
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/etherdevice.h>
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#include <linux/crc32.h>
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#include <linux/usb/cdc.h>
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#include "u_ether.h"
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#include "u_ether_configfs.h"
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#include "u_ncm.h"
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#include "configfs.h"
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/*
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* This function is a "CDC Network Control Model" (CDC NCM) Ethernet link.
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* NCM is intended to be used with high-speed network attachments.
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*
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* Note that NCM requires the use of "alternate settings" for its data
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* interface. This means that the set_alt() method has real work to do,
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* and also means that a get_alt() method is required.
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*/
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/* to trigger crc/non-crc ndp signature */
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#define NCM_NDP_HDR_CRC 0x01000000
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enum ncm_notify_state {
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NCM_NOTIFY_NONE, /* don't notify */
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NCM_NOTIFY_CONNECT, /* issue CONNECT next */
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NCM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */
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};
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struct f_ncm {
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struct gether port;
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u8 ctrl_id, data_id;
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char ethaddr[14];
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struct usb_ep *notify;
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struct usb_request *notify_req;
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u8 notify_state;
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atomic_t notify_count;
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bool is_open;
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const struct ndp_parser_opts *parser_opts;
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bool is_crc;
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u32 ndp_sign;
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/*
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* for notification, it is accessed from both
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* callback and ethernet open/close
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*/
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spinlock_t lock;
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struct net_device *netdev;
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/* For multi-frame NDP TX */
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struct sk_buff *skb_tx_data;
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struct sk_buff *skb_tx_ndp;
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u16 ndp_dgram_count;
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struct hrtimer task_timer;
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};
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static inline struct f_ncm *func_to_ncm(struct usb_function *f)
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{
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return container_of(f, struct f_ncm, port.func);
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}
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/*-------------------------------------------------------------------------*/
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/*
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* We cannot group frames so use just the minimal size which ok to put
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* one max-size ethernet frame.
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* If the host can group frames, allow it to do that, 16K is selected,
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* because it's used by default by the current linux host driver
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*/
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#define NTB_DEFAULT_IN_SIZE 16384
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#define NTB_OUT_SIZE 16384
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/* Allocation for storing the NDP, 32 should suffice for a
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* 16k packet. This allows a maximum of 32 * 507 Byte packets to
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* be transmitted in a single 16kB skb, though when sending full size
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* packets this limit will be plenty.
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* Smaller packets are not likely to be trying to maximize the
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* throughput and will be mstly sending smaller infrequent frames.
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*/
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#define TX_MAX_NUM_DPE 32
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/* Delay for the transmit to wait before sending an unfilled NTB frame. */
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#define TX_TIMEOUT_NSECS 300000
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/*
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* Although max mtu as dictated by u_ether is 15412 bytes, setting
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* max_segment_size to 15426 would not be efficient. If user chooses segment
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* size to be (>= 8192), then we can't aggregate more than one buffer in each
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* NTB (assuming each packet coming from network layer is >= 8192 bytes) as ep
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* maxpacket limit is 16384. So let max_segment_size be limited to 8000 to allow
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* at least 2 packets to be aggregated reducing wastage of NTB buffer space
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*/
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#define MAX_DATAGRAM_SIZE 8000
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#define FORMATS_SUPPORTED (USB_CDC_NCM_NTB16_SUPPORTED | \
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USB_CDC_NCM_NTB32_SUPPORTED)
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static struct usb_cdc_ncm_ntb_parameters ntb_parameters = {
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.wLength = cpu_to_le16(sizeof(ntb_parameters)),
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.bmNtbFormatsSupported = cpu_to_le16(FORMATS_SUPPORTED),
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.dwNtbInMaxSize = cpu_to_le32(NTB_DEFAULT_IN_SIZE),
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.wNdpInDivisor = cpu_to_le16(4),
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.wNdpInPayloadRemainder = cpu_to_le16(0),
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.wNdpInAlignment = cpu_to_le16(4),
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.dwNtbOutMaxSize = cpu_to_le32(NTB_OUT_SIZE),
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.wNdpOutDivisor = cpu_to_le16(4),
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.wNdpOutPayloadRemainder = cpu_to_le16(0),
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.wNdpOutAlignment = cpu_to_le16(4),
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};
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/*
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* Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
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* packet, to simplify cancellation; and a big transfer interval, to
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* waste less bandwidth.
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*/
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#define NCM_STATUS_INTERVAL_MS 32
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#define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */
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static struct usb_interface_assoc_descriptor ncm_iad_desc = {
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.bLength = sizeof ncm_iad_desc,
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.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
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/* .bFirstInterface = DYNAMIC, */
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.bInterfaceCount = 2, /* control + data */
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.bFunctionClass = USB_CLASS_COMM,
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.bFunctionSubClass = USB_CDC_SUBCLASS_NCM,
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.bFunctionProtocol = USB_CDC_PROTO_NONE,
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/* .iFunction = DYNAMIC */
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};
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/* interface descriptor: */
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static struct usb_interface_descriptor ncm_control_intf = {
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.bLength = sizeof ncm_control_intf,
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.bDescriptorType = USB_DT_INTERFACE,
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/* .bInterfaceNumber = DYNAMIC */
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.bNumEndpoints = 1,
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.bInterfaceClass = USB_CLASS_COMM,
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.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
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.bInterfaceProtocol = USB_CDC_PROTO_NONE,
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/* .iInterface = DYNAMIC */
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};
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static struct usb_cdc_header_desc ncm_header_desc = {
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.bLength = sizeof ncm_header_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = USB_CDC_HEADER_TYPE,
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.bcdCDC = cpu_to_le16(0x0110),
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};
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static struct usb_cdc_union_desc ncm_union_desc = {
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.bLength = sizeof(ncm_union_desc),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = USB_CDC_UNION_TYPE,
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/* .bMasterInterface0 = DYNAMIC */
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/* .bSlaveInterface0 = DYNAMIC */
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};
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static struct usb_cdc_ether_desc ecm_desc = {
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.bLength = sizeof ecm_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
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/* this descriptor actually adds value, surprise! */
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/* .iMACAddress = DYNAMIC */
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.bmEthernetStatistics = cpu_to_le32(0), /* no statistics */
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.wNumberMCFilters = cpu_to_le16(0),
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.bNumberPowerFilters = 0,
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};
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#define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE)
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static struct usb_cdc_ncm_desc ncm_desc = {
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.bLength = sizeof ncm_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = USB_CDC_NCM_TYPE,
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.bcdNcmVersion = cpu_to_le16(0x0100),
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/* can process SetEthernetPacketFilter */
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.bmNetworkCapabilities = NCAPS,
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};
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/* the default data interface has no endpoints ... */
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static struct usb_interface_descriptor ncm_data_nop_intf = {
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.bLength = sizeof ncm_data_nop_intf,
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.bDescriptorType = USB_DT_INTERFACE,
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.bInterfaceNumber = 1,
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.bAlternateSetting = 0,
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.bNumEndpoints = 0,
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.bInterfaceClass = USB_CLASS_CDC_DATA,
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.bInterfaceSubClass = 0,
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.bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
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/* .iInterface = DYNAMIC */
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};
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/* ... but the "real" data interface has two bulk endpoints */
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static struct usb_interface_descriptor ncm_data_intf = {
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.bLength = sizeof ncm_data_intf,
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.bDescriptorType = USB_DT_INTERFACE,
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.bInterfaceNumber = 1,
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.bAlternateSetting = 1,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_CDC_DATA,
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.bInterfaceSubClass = 0,
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.bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB,
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/* .iInterface = DYNAMIC */
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};
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/* full speed support: */
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static struct usb_endpoint_descriptor fs_ncm_notify_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_INT,
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.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
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.bInterval = NCM_STATUS_INTERVAL_MS,
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};
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static struct usb_endpoint_descriptor fs_ncm_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_endpoint_descriptor fs_ncm_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_descriptor_header *ncm_fs_function[] = {
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(struct usb_descriptor_header *) &ncm_iad_desc,
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/* CDC NCM control descriptors */
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(struct usb_descriptor_header *) &ncm_control_intf,
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(struct usb_descriptor_header *) &ncm_header_desc,
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(struct usb_descriptor_header *) &ncm_union_desc,
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(struct usb_descriptor_header *) &ecm_desc,
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(struct usb_descriptor_header *) &ncm_desc,
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(struct usb_descriptor_header *) &fs_ncm_notify_desc,
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/* data interface, altsettings 0 and 1 */
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(struct usb_descriptor_header *) &ncm_data_nop_intf,
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(struct usb_descriptor_header *) &ncm_data_intf,
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(struct usb_descriptor_header *) &fs_ncm_in_desc,
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(struct usb_descriptor_header *) &fs_ncm_out_desc,
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NULL,
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};
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/* high speed support: */
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static struct usb_endpoint_descriptor hs_ncm_notify_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_INT,
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.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
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.bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS),
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};
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static struct usb_endpoint_descriptor hs_ncm_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor hs_ncm_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_descriptor_header *ncm_hs_function[] = {
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(struct usb_descriptor_header *) &ncm_iad_desc,
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/* CDC NCM control descriptors */
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(struct usb_descriptor_header *) &ncm_control_intf,
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(struct usb_descriptor_header *) &ncm_header_desc,
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(struct usb_descriptor_header *) &ncm_union_desc,
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(struct usb_descriptor_header *) &ecm_desc,
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(struct usb_descriptor_header *) &ncm_desc,
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(struct usb_descriptor_header *) &hs_ncm_notify_desc,
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/* data interface, altsettings 0 and 1 */
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(struct usb_descriptor_header *) &ncm_data_nop_intf,
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(struct usb_descriptor_header *) &ncm_data_intf,
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(struct usb_descriptor_header *) &hs_ncm_in_desc,
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(struct usb_descriptor_header *) &hs_ncm_out_desc,
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NULL,
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};
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/* super speed support: */
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static struct usb_endpoint_descriptor ss_ncm_notify_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_INT,
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.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
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.bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS)
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};
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static struct usb_ss_ep_comp_descriptor ss_ncm_notify_comp_desc = {
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.bLength = sizeof(ss_ncm_notify_comp_desc),
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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/* the following 3 values can be tweaked if necessary */
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/* .bMaxBurst = 0, */
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/* .bmAttributes = 0, */
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.wBytesPerInterval = cpu_to_le16(NCM_STATUS_BYTECOUNT),
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};
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static struct usb_endpoint_descriptor ss_ncm_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(1024),
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};
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static struct usb_endpoint_descriptor ss_ncm_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(1024),
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};
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static struct usb_ss_ep_comp_descriptor ss_ncm_bulk_comp_desc = {
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.bLength = sizeof(ss_ncm_bulk_comp_desc),
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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/* the following 2 values can be tweaked if necessary */
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.bMaxBurst = 15,
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/* .bmAttributes = 0, */
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};
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static struct usb_descriptor_header *ncm_ss_function[] = {
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(struct usb_descriptor_header *) &ncm_iad_desc,
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/* CDC NCM control descriptors */
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(struct usb_descriptor_header *) &ncm_control_intf,
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(struct usb_descriptor_header *) &ncm_header_desc,
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(struct usb_descriptor_header *) &ncm_union_desc,
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(struct usb_descriptor_header *) &ecm_desc,
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(struct usb_descriptor_header *) &ncm_desc,
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(struct usb_descriptor_header *) &ss_ncm_notify_desc,
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(struct usb_descriptor_header *) &ss_ncm_notify_comp_desc,
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/* data interface, altsettings 0 and 1 */
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(struct usb_descriptor_header *) &ncm_data_nop_intf,
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(struct usb_descriptor_header *) &ncm_data_intf,
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(struct usb_descriptor_header *) &ss_ncm_in_desc,
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(struct usb_descriptor_header *) &ss_ncm_bulk_comp_desc,
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(struct usb_descriptor_header *) &ss_ncm_out_desc,
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(struct usb_descriptor_header *) &ss_ncm_bulk_comp_desc,
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NULL,
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};
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/* string descriptors: */
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#define STRING_CTRL_IDX 0
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#define STRING_MAC_IDX 1
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#define STRING_DATA_IDX 2
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#define STRING_IAD_IDX 3
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static struct usb_string ncm_string_defs[] = {
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[STRING_CTRL_IDX].s = "CDC Network Control Model (NCM)",
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[STRING_MAC_IDX].s = "",
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[STRING_DATA_IDX].s = "CDC Network Data",
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[STRING_IAD_IDX].s = "CDC NCM",
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{ } /* end of list */
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};
|
|
|
|
static struct usb_gadget_strings ncm_string_table = {
|
|
.language = 0x0409, /* en-us */
|
|
.strings = ncm_string_defs,
|
|
};
|
|
|
|
static struct usb_gadget_strings *ncm_strings[] = {
|
|
&ncm_string_table,
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* Here are options for NCM Datagram Pointer table (NDP) parser.
|
|
* There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3),
|
|
* in NDP16 offsets and sizes fields are 1 16bit word wide,
|
|
* in NDP32 -- 2 16bit words wide. Also signatures are different.
|
|
* To make the parser code the same, put the differences in the structure,
|
|
* and switch pointers to the structures when the format is changed.
|
|
*/
|
|
|
|
struct ndp_parser_opts {
|
|
u32 nth_sign;
|
|
u32 ndp_sign;
|
|
unsigned nth_size;
|
|
unsigned ndp_size;
|
|
unsigned dpe_size;
|
|
unsigned ndplen_align;
|
|
/* sizes in u16 units */
|
|
unsigned dgram_item_len; /* index or length */
|
|
unsigned block_length;
|
|
unsigned ndp_index;
|
|
unsigned reserved1;
|
|
unsigned reserved2;
|
|
unsigned next_ndp_index;
|
|
};
|
|
|
|
static const struct ndp_parser_opts ndp16_opts = {
|
|
.nth_sign = USB_CDC_NCM_NTH16_SIGN,
|
|
.ndp_sign = USB_CDC_NCM_NDP16_NOCRC_SIGN,
|
|
.nth_size = sizeof(struct usb_cdc_ncm_nth16),
|
|
.ndp_size = sizeof(struct usb_cdc_ncm_ndp16),
|
|
.dpe_size = sizeof(struct usb_cdc_ncm_dpe16),
|
|
.ndplen_align = 4,
|
|
.dgram_item_len = 1,
|
|
.block_length = 1,
|
|
.ndp_index = 1,
|
|
.reserved1 = 0,
|
|
.reserved2 = 0,
|
|
.next_ndp_index = 1,
|
|
};
|
|
|
|
static const struct ndp_parser_opts ndp32_opts = {
|
|
.nth_sign = USB_CDC_NCM_NTH32_SIGN,
|
|
.ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN,
|
|
.nth_size = sizeof(struct usb_cdc_ncm_nth32),
|
|
.ndp_size = sizeof(struct usb_cdc_ncm_ndp32),
|
|
.dpe_size = sizeof(struct usb_cdc_ncm_dpe32),
|
|
.ndplen_align = 8,
|
|
.dgram_item_len = 2,
|
|
.block_length = 2,
|
|
.ndp_index = 2,
|
|
.reserved1 = 1,
|
|
.reserved2 = 2,
|
|
.next_ndp_index = 2,
|
|
};
|
|
|
|
static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
|
|
{
|
|
switch (size) {
|
|
case 1:
|
|
put_unaligned_le16((u16)val, *p);
|
|
break;
|
|
case 2:
|
|
put_unaligned_le32((u32)val, *p);
|
|
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
*p += size;
|
|
}
|
|
|
|
static inline unsigned get_ncm(__le16 **p, unsigned size)
|
|
{
|
|
unsigned tmp;
|
|
|
|
switch (size) {
|
|
case 1:
|
|
tmp = get_unaligned_le16(*p);
|
|
break;
|
|
case 2:
|
|
tmp = get_unaligned_le32(*p);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
*p += size;
|
|
return tmp;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static inline void ncm_reset_values(struct f_ncm *ncm)
|
|
{
|
|
ncm->parser_opts = &ndp16_opts;
|
|
ncm->is_crc = false;
|
|
ncm->ndp_sign = ncm->parser_opts->ndp_sign;
|
|
ncm->port.cdc_filter = DEFAULT_FILTER;
|
|
|
|
/* doesn't make sense for ncm, fixed size used */
|
|
ncm->port.header_len = 0;
|
|
|
|
ncm->port.fixed_out_len = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
|
|
ncm->port.fixed_in_len = NTB_DEFAULT_IN_SIZE;
|
|
}
|
|
|
|
/*
|
|
* Context: ncm->lock held
|
|
*/
|
|
static void ncm_do_notify(struct f_ncm *ncm)
|
|
{
|
|
struct usb_request *req = ncm->notify_req;
|
|
struct usb_cdc_notification *event;
|
|
struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
|
|
__le32 *data;
|
|
int status;
|
|
|
|
/* notification already in flight? */
|
|
if (atomic_read(&ncm->notify_count))
|
|
return;
|
|
|
|
event = req->buf;
|
|
switch (ncm->notify_state) {
|
|
case NCM_NOTIFY_NONE:
|
|
return;
|
|
|
|
case NCM_NOTIFY_CONNECT:
|
|
event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
|
|
if (ncm->is_open)
|
|
event->wValue = cpu_to_le16(1);
|
|
else
|
|
event->wValue = cpu_to_le16(0);
|
|
event->wLength = 0;
|
|
req->length = sizeof *event;
|
|
|
|
DBG(cdev, "notify connect %s\n",
|
|
ncm->is_open ? "true" : "false");
|
|
ncm->notify_state = NCM_NOTIFY_NONE;
|
|
break;
|
|
|
|
case NCM_NOTIFY_SPEED:
|
|
event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
|
|
event->wValue = cpu_to_le16(0);
|
|
event->wLength = cpu_to_le16(8);
|
|
req->length = NCM_STATUS_BYTECOUNT;
|
|
|
|
/* SPEED_CHANGE data is up/down speeds in bits/sec */
|
|
data = req->buf + sizeof *event;
|
|
data[0] = cpu_to_le32(gether_bitrate(cdev->gadget));
|
|
data[1] = data[0];
|
|
|
|
DBG(cdev, "notify speed %u\n", gether_bitrate(cdev->gadget));
|
|
ncm->notify_state = NCM_NOTIFY_CONNECT;
|
|
break;
|
|
}
|
|
event->bmRequestType = 0xA1;
|
|
event->wIndex = cpu_to_le16(ncm->ctrl_id);
|
|
|
|
atomic_inc(&ncm->notify_count);
|
|
|
|
/*
|
|
* In double buffering if there is a space in FIFO,
|
|
* completion callback can be called right after the call,
|
|
* so unlocking
|
|
*/
|
|
spin_unlock(&ncm->lock);
|
|
status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC);
|
|
spin_lock(&ncm->lock);
|
|
if (status < 0) {
|
|
atomic_dec(&ncm->notify_count);
|
|
DBG(cdev, "notify --> %d\n", status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Context: ncm->lock held
|
|
*/
|
|
static void ncm_notify(struct f_ncm *ncm)
|
|
{
|
|
/*
|
|
* NOTE on most versions of Linux, host side cdc-ethernet
|
|
* won't listen for notifications until its netdevice opens.
|
|
* The first notification then sits in the FIFO for a long
|
|
* time, and the second one is queued.
|
|
*
|
|
* If ncm_notify() is called before the second (CONNECT)
|
|
* notification is sent, then it will reset to send the SPEED
|
|
* notificaion again (and again, and again), but it's not a problem
|
|
*/
|
|
ncm->notify_state = NCM_NOTIFY_SPEED;
|
|
ncm_do_notify(ncm);
|
|
}
|
|
|
|
static void ncm_notify_complete(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct f_ncm *ncm = req->context;
|
|
struct usb_composite_dev *cdev = ncm->port.func.config->cdev;
|
|
struct usb_cdc_notification *event = req->buf;
|
|
|
|
spin_lock(&ncm->lock);
|
|
switch (req->status) {
|
|
case 0:
|
|
VDBG(cdev, "Notification %02x sent\n",
|
|
event->bNotificationType);
|
|
atomic_dec(&ncm->notify_count);
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ESHUTDOWN:
|
|
atomic_set(&ncm->notify_count, 0);
|
|
ncm->notify_state = NCM_NOTIFY_NONE;
|
|
break;
|
|
default:
|
|
DBG(cdev, "event %02x --> %d\n",
|
|
event->bNotificationType, req->status);
|
|
atomic_dec(&ncm->notify_count);
|
|
break;
|
|
}
|
|
ncm_do_notify(ncm);
|
|
spin_unlock(&ncm->lock);
|
|
}
|
|
|
|
static void ncm_ep0out_complete(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
/* now for SET_NTB_INPUT_SIZE only */
|
|
unsigned in_size;
|
|
struct usb_function *f = req->context;
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
struct usb_composite_dev *cdev = f->config->cdev;
|
|
|
|
req->context = NULL;
|
|
if (req->status || req->actual != req->length) {
|
|
DBG(cdev, "Bad control-OUT transfer\n");
|
|
goto invalid;
|
|
}
|
|
|
|
in_size = get_unaligned_le32(req->buf);
|
|
if (in_size < USB_CDC_NCM_NTB_MIN_IN_SIZE ||
|
|
in_size > le32_to_cpu(ntb_parameters.dwNtbInMaxSize)) {
|
|
DBG(cdev, "Got wrong INPUT SIZE (%d) from host\n", in_size);
|
|
goto invalid;
|
|
}
|
|
|
|
ncm->port.fixed_in_len = in_size;
|
|
VDBG(cdev, "Set NTB INPUT SIZE %d\n", in_size);
|
|
return;
|
|
|
|
invalid:
|
|
usb_ep_set_halt(ep);
|
|
return;
|
|
}
|
|
|
|
static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
struct usb_composite_dev *cdev = f->config->cdev;
|
|
struct usb_request *req = cdev->req;
|
|
int value = -EOPNOTSUPP;
|
|
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
|
u16 w_length = le16_to_cpu(ctrl->wLength);
|
|
|
|
/*
|
|
* composite driver infrastructure handles everything except
|
|
* CDC class messages; interface activation uses set_alt().
|
|
*/
|
|
switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
|
|
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_SET_ETHERNET_PACKET_FILTER:
|
|
/*
|
|
* see 6.2.30: no data, wIndex = interface,
|
|
* wValue = packet filter bitmap
|
|
*/
|
|
if (w_length != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
DBG(cdev, "packet filter %02x\n", w_value);
|
|
/*
|
|
* REVISIT locking of cdc_filter. This assumes the UDC
|
|
* driver won't have a concurrent packet TX irq running on
|
|
* another CPU; or that if it does, this write is atomic...
|
|
*/
|
|
ncm->port.cdc_filter = w_value;
|
|
value = 0;
|
|
break;
|
|
/*
|
|
* and optionally:
|
|
* case USB_CDC_SEND_ENCAPSULATED_COMMAND:
|
|
* case USB_CDC_GET_ENCAPSULATED_RESPONSE:
|
|
* case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
|
|
* case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
|
|
* case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
|
|
* case USB_CDC_GET_ETHERNET_STATISTIC:
|
|
*/
|
|
|
|
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_GET_NTB_PARAMETERS:
|
|
|
|
if (w_length == 0 || w_value != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
value = w_length > sizeof ntb_parameters ?
|
|
sizeof ntb_parameters : w_length;
|
|
memcpy(req->buf, &ntb_parameters, value);
|
|
VDBG(cdev, "Host asked NTB parameters\n");
|
|
break;
|
|
|
|
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_GET_NTB_INPUT_SIZE:
|
|
|
|
if (w_length < 4 || w_value != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
put_unaligned_le32(ncm->port.fixed_in_len, req->buf);
|
|
value = 4;
|
|
VDBG(cdev, "Host asked INPUT SIZE, sending %d\n",
|
|
ncm->port.fixed_in_len);
|
|
break;
|
|
|
|
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_SET_NTB_INPUT_SIZE:
|
|
{
|
|
if (w_length != 4 || w_value != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
req->complete = ncm_ep0out_complete;
|
|
req->length = w_length;
|
|
req->context = f;
|
|
|
|
value = req->length;
|
|
break;
|
|
}
|
|
|
|
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_GET_NTB_FORMAT:
|
|
{
|
|
uint16_t format;
|
|
|
|
if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
format = (ncm->parser_opts == &ndp16_opts) ? 0x0000 : 0x0001;
|
|
put_unaligned_le16(format, req->buf);
|
|
value = 2;
|
|
VDBG(cdev, "Host asked NTB FORMAT, sending %d\n", format);
|
|
break;
|
|
}
|
|
|
|
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_SET_NTB_FORMAT:
|
|
{
|
|
if (w_length != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
switch (w_value) {
|
|
case 0x0000:
|
|
ncm->parser_opts = &ndp16_opts;
|
|
DBG(cdev, "NCM16 selected\n");
|
|
break;
|
|
case 0x0001:
|
|
ncm->parser_opts = &ndp32_opts;
|
|
DBG(cdev, "NCM32 selected\n");
|
|
break;
|
|
default:
|
|
goto invalid;
|
|
}
|
|
value = 0;
|
|
break;
|
|
}
|
|
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_GET_CRC_MODE:
|
|
{
|
|
uint16_t is_crc;
|
|
|
|
if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
is_crc = ncm->is_crc ? 0x0001 : 0x0000;
|
|
put_unaligned_le16(is_crc, req->buf);
|
|
value = 2;
|
|
VDBG(cdev, "Host asked CRC MODE, sending %d\n", is_crc);
|
|
break;
|
|
}
|
|
|
|
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
|
| USB_CDC_SET_CRC_MODE:
|
|
{
|
|
if (w_length != 0 || w_index != ncm->ctrl_id)
|
|
goto invalid;
|
|
switch (w_value) {
|
|
case 0x0000:
|
|
ncm->is_crc = false;
|
|
DBG(cdev, "non-CRC mode selected\n");
|
|
break;
|
|
case 0x0001:
|
|
ncm->is_crc = true;
|
|
DBG(cdev, "CRC mode selected\n");
|
|
break;
|
|
default:
|
|
goto invalid;
|
|
}
|
|
value = 0;
|
|
break;
|
|
}
|
|
|
|
/* and disabled in ncm descriptor: */
|
|
/* case USB_CDC_GET_NET_ADDRESS: */
|
|
/* case USB_CDC_SET_NET_ADDRESS: */
|
|
/* case USB_CDC_GET_MAX_DATAGRAM_SIZE: */
|
|
/* case USB_CDC_SET_MAX_DATAGRAM_SIZE: */
|
|
|
|
default:
|
|
invalid:
|
|
DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
|
|
ctrl->bRequestType, ctrl->bRequest,
|
|
w_value, w_index, w_length);
|
|
}
|
|
ncm->ndp_sign = ncm->parser_opts->ndp_sign |
|
|
(ncm->is_crc ? NCM_NDP_HDR_CRC : 0);
|
|
|
|
/* respond with data transfer or status phase? */
|
|
if (value >= 0) {
|
|
DBG(cdev, "ncm req%02x.%02x v%04x i%04x l%d\n",
|
|
ctrl->bRequestType, ctrl->bRequest,
|
|
w_value, w_index, w_length);
|
|
req->zero = 0;
|
|
req->length = value;
|
|
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
|
|
if (value < 0)
|
|
ERROR(cdev, "ncm req %02x.%02x response err %d\n",
|
|
ctrl->bRequestType, ctrl->bRequest,
|
|
value);
|
|
}
|
|
|
|
/* device either stalls (value < 0) or reports success */
|
|
return value;
|
|
}
|
|
|
|
|
|
static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
struct usb_composite_dev *cdev = f->config->cdev;
|
|
|
|
/* Control interface has only altsetting 0 */
|
|
if (intf == ncm->ctrl_id) {
|
|
if (alt != 0)
|
|
goto fail;
|
|
|
|
DBG(cdev, "reset ncm control %d\n", intf);
|
|
usb_ep_disable(ncm->notify);
|
|
|
|
if (!(ncm->notify->desc)) {
|
|
DBG(cdev, "init ncm ctrl %d\n", intf);
|
|
if (config_ep_by_speed(cdev->gadget, f, ncm->notify))
|
|
goto fail;
|
|
}
|
|
usb_ep_enable(ncm->notify);
|
|
|
|
/* Data interface has two altsettings, 0 and 1 */
|
|
} else if (intf == ncm->data_id) {
|
|
if (alt > 1)
|
|
goto fail;
|
|
|
|
if (ncm->netdev) {
|
|
DBG(cdev, "reset ncm\n");
|
|
ncm->netdev = NULL;
|
|
gether_disconnect(&ncm->port);
|
|
ncm_reset_values(ncm);
|
|
}
|
|
|
|
/*
|
|
* CDC Network only sends data in non-default altsettings.
|
|
* Changing altsettings resets filters, statistics, etc.
|
|
*/
|
|
if (alt == 1) {
|
|
struct net_device *net;
|
|
|
|
if (!ncm->port.in_ep->desc ||
|
|
!ncm->port.out_ep->desc) {
|
|
DBG(cdev, "init ncm\n");
|
|
if (config_ep_by_speed(cdev->gadget, f,
|
|
ncm->port.in_ep) ||
|
|
config_ep_by_speed(cdev->gadget, f,
|
|
ncm->port.out_ep)) {
|
|
ncm->port.in_ep->desc = NULL;
|
|
ncm->port.out_ep->desc = NULL;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* TODO */
|
|
/* Enable zlps by default for NCM conformance;
|
|
* override for musb_hdrc (avoids txdma ovhead)
|
|
*/
|
|
ncm->port.is_zlp_ok =
|
|
gadget_is_zlp_supported(cdev->gadget);
|
|
ncm->port.cdc_filter = DEFAULT_FILTER;
|
|
DBG(cdev, "activate ncm\n");
|
|
net = gether_connect(&ncm->port);
|
|
if (IS_ERR(net))
|
|
return PTR_ERR(net);
|
|
ncm->netdev = net;
|
|
}
|
|
|
|
spin_lock(&ncm->lock);
|
|
ncm_notify(ncm);
|
|
spin_unlock(&ncm->lock);
|
|
} else
|
|
goto fail;
|
|
|
|
return 0;
|
|
fail:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Because the data interface supports multiple altsettings,
|
|
* this NCM function *MUST* implement a get_alt() method.
|
|
*/
|
|
static int ncm_get_alt(struct usb_function *f, unsigned intf)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
|
|
if (intf == ncm->ctrl_id)
|
|
return 0;
|
|
return ncm->port.in_ep->enabled ? 1 : 0;
|
|
}
|
|
|
|
static struct sk_buff *package_for_tx(struct f_ncm *ncm)
|
|
{
|
|
__le16 *ntb_iter;
|
|
struct sk_buff *skb2 = NULL;
|
|
unsigned ndp_pad;
|
|
unsigned ndp_index;
|
|
unsigned new_len;
|
|
|
|
const struct ndp_parser_opts *opts = ncm->parser_opts;
|
|
const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
|
|
const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
|
|
|
|
/* Stop the timer */
|
|
hrtimer_try_to_cancel(&ncm->task_timer);
|
|
|
|
ndp_pad = ALIGN(ncm->skb_tx_data->len, ndp_align) -
|
|
ncm->skb_tx_data->len;
|
|
ndp_index = ncm->skb_tx_data->len + ndp_pad;
|
|
new_len = ndp_index + dgram_idx_len + ncm->skb_tx_ndp->len;
|
|
|
|
/* Set the final BlockLength and wNdpIndex */
|
|
ntb_iter = (void *) ncm->skb_tx_data->data;
|
|
/* Increment pointer to BlockLength */
|
|
ntb_iter += 2 + 1 + 1;
|
|
put_ncm(&ntb_iter, opts->block_length, new_len);
|
|
put_ncm(&ntb_iter, opts->ndp_index, ndp_index);
|
|
|
|
/* Set the final NDP wLength */
|
|
new_len = opts->ndp_size +
|
|
(ncm->ndp_dgram_count * dgram_idx_len);
|
|
ncm->ndp_dgram_count = 0;
|
|
/* Increment from start to wLength */
|
|
ntb_iter = (void *) ncm->skb_tx_ndp->data;
|
|
ntb_iter += 2;
|
|
put_unaligned_le16(new_len, ntb_iter);
|
|
|
|
/* Merge the skbs */
|
|
swap(skb2, ncm->skb_tx_data);
|
|
if (ncm->skb_tx_data) {
|
|
dev_consume_skb_any(ncm->skb_tx_data);
|
|
ncm->skb_tx_data = NULL;
|
|
}
|
|
|
|
/* Insert NDP alignment. */
|
|
skb_put_zero(skb2, ndp_pad);
|
|
|
|
/* Copy NTB across. */
|
|
skb_put_data(skb2, ncm->skb_tx_ndp->data, ncm->skb_tx_ndp->len);
|
|
dev_consume_skb_any(ncm->skb_tx_ndp);
|
|
ncm->skb_tx_ndp = NULL;
|
|
|
|
/* Insert zero'd datagram. */
|
|
skb_put_zero(skb2, dgram_idx_len);
|
|
|
|
return skb2;
|
|
}
|
|
|
|
static struct sk_buff *ncm_wrap_ntb(struct gether *port,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(&port->func);
|
|
struct sk_buff *skb2 = NULL;
|
|
|
|
if (skb) {
|
|
int ncb_len = 0;
|
|
__le16 *ntb_data;
|
|
__le16 *ntb_ndp;
|
|
int dgram_pad;
|
|
|
|
unsigned max_size = ncm->port.fixed_in_len;
|
|
const struct ndp_parser_opts *opts = ncm->parser_opts;
|
|
const int ndp_align = le16_to_cpu(ntb_parameters.wNdpInAlignment);
|
|
const int div = le16_to_cpu(ntb_parameters.wNdpInDivisor);
|
|
const int rem = le16_to_cpu(ntb_parameters.wNdpInPayloadRemainder);
|
|
const int dgram_idx_len = 2 * 2 * opts->dgram_item_len;
|
|
|
|
/* Add the CRC if required up front */
|
|
if (ncm->is_crc) {
|
|
uint32_t crc;
|
|
__le16 *crc_pos;
|
|
|
|
crc = ~crc32_le(~0,
|
|
skb->data,
|
|
skb->len);
|
|
crc_pos = skb_put(skb, sizeof(uint32_t));
|
|
put_unaligned_le32(crc, crc_pos);
|
|
}
|
|
|
|
/* If the new skb is too big for the current NCM NTB then
|
|
* set the current stored skb to be sent now and clear it
|
|
* ready for new data.
|
|
* NOTE: Assume maximum align for speed of calculation.
|
|
*/
|
|
if (ncm->skb_tx_data
|
|
&& (ncm->ndp_dgram_count >= TX_MAX_NUM_DPE
|
|
|| (ncm->skb_tx_data->len +
|
|
div + rem + skb->len +
|
|
ncm->skb_tx_ndp->len + ndp_align + (2 * dgram_idx_len))
|
|
> max_size)) {
|
|
skb2 = package_for_tx(ncm);
|
|
if (!skb2)
|
|
goto err;
|
|
}
|
|
|
|
if (!ncm->skb_tx_data) {
|
|
ncb_len = opts->nth_size;
|
|
dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
|
|
ncb_len += dgram_pad;
|
|
|
|
/* Create a new skb for the NTH and datagrams. */
|
|
ncm->skb_tx_data = alloc_skb(max_size, GFP_ATOMIC);
|
|
if (!ncm->skb_tx_data)
|
|
goto err;
|
|
|
|
ncm->skb_tx_data->dev = ncm->netdev;
|
|
ntb_data = skb_put_zero(ncm->skb_tx_data, ncb_len);
|
|
/* dwSignature */
|
|
put_unaligned_le32(opts->nth_sign, ntb_data);
|
|
ntb_data += 2;
|
|
/* wHeaderLength */
|
|
put_unaligned_le16(opts->nth_size, ntb_data++);
|
|
|
|
/* Allocate an skb for storing the NDP,
|
|
* TX_MAX_NUM_DPE should easily suffice for a
|
|
* 16k packet.
|
|
*/
|
|
ncm->skb_tx_ndp = alloc_skb((int)(opts->ndp_size
|
|
+ opts->dpe_size
|
|
* TX_MAX_NUM_DPE),
|
|
GFP_ATOMIC);
|
|
if (!ncm->skb_tx_ndp)
|
|
goto err;
|
|
|
|
ncm->skb_tx_ndp->dev = ncm->netdev;
|
|
ntb_ndp = skb_put(ncm->skb_tx_ndp, opts->ndp_size);
|
|
memset(ntb_ndp, 0, ncb_len);
|
|
/* dwSignature */
|
|
put_unaligned_le32(ncm->ndp_sign, ntb_ndp);
|
|
ntb_ndp += 2;
|
|
|
|
/* There is always a zeroed entry */
|
|
ncm->ndp_dgram_count = 1;
|
|
|
|
/* Note: we skip opts->next_ndp_index */
|
|
|
|
/* Start the timer. */
|
|
hrtimer_start(&ncm->task_timer, TX_TIMEOUT_NSECS,
|
|
HRTIMER_MODE_REL_SOFT);
|
|
}
|
|
|
|
/* Add the datagram position entries */
|
|
ntb_ndp = skb_put_zero(ncm->skb_tx_ndp, dgram_idx_len);
|
|
|
|
ncb_len = ncm->skb_tx_data->len;
|
|
dgram_pad = ALIGN(ncb_len, div) + rem - ncb_len;
|
|
ncb_len += dgram_pad;
|
|
|
|
/* (d)wDatagramIndex */
|
|
put_ncm(&ntb_ndp, opts->dgram_item_len, ncb_len);
|
|
/* (d)wDatagramLength */
|
|
put_ncm(&ntb_ndp, opts->dgram_item_len, skb->len);
|
|
ncm->ndp_dgram_count++;
|
|
|
|
/* Add the new data to the skb */
|
|
skb_put_zero(ncm->skb_tx_data, dgram_pad);
|
|
skb_put_data(ncm->skb_tx_data, skb->data, skb->len);
|
|
dev_consume_skb_any(skb);
|
|
skb = NULL;
|
|
|
|
} else if (ncm->skb_tx_data) {
|
|
/* If we get here ncm_wrap_ntb() was called with NULL skb,
|
|
* because eth_start_xmit() was called with NULL skb by
|
|
* ncm_tx_timeout() - hence, this is our signal to flush/send.
|
|
*/
|
|
skb2 = package_for_tx(ncm);
|
|
if (!skb2)
|
|
goto err;
|
|
}
|
|
|
|
return skb2;
|
|
|
|
err:
|
|
ncm->netdev->stats.tx_dropped++;
|
|
|
|
if (skb)
|
|
dev_kfree_skb_any(skb);
|
|
if (ncm->skb_tx_data)
|
|
dev_kfree_skb_any(ncm->skb_tx_data);
|
|
if (ncm->skb_tx_ndp)
|
|
dev_kfree_skb_any(ncm->skb_tx_ndp);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* The transmit should only be run if no skb data has been sent
|
|
* for a certain duration.
|
|
*/
|
|
static enum hrtimer_restart ncm_tx_timeout(struct hrtimer *data)
|
|
{
|
|
struct f_ncm *ncm = container_of(data, struct f_ncm, task_timer);
|
|
struct net_device *netdev = READ_ONCE(ncm->netdev);
|
|
|
|
if (netdev) {
|
|
/* XXX This allowance of a NULL skb argument to ndo_start_xmit
|
|
* XXX is not sane. The gadget layer should be redesigned so
|
|
* XXX that the dev->wrap() invocations to build SKBs is transparent
|
|
* XXX and performed in some way outside of the ndo_start_xmit
|
|
* XXX interface.
|
|
*
|
|
* This will call directly into u_ether's eth_start_xmit()
|
|
*/
|
|
netdev->netdev_ops->ndo_start_xmit(NULL, netdev);
|
|
}
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
static int ncm_unwrap_ntb(struct gether *port,
|
|
struct sk_buff *skb,
|
|
struct sk_buff_head *list)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(&port->func);
|
|
unsigned char *ntb_ptr = skb->data;
|
|
__le16 *tmp;
|
|
unsigned index, index2;
|
|
int ndp_index;
|
|
unsigned dg_len, dg_len2;
|
|
unsigned ndp_len;
|
|
unsigned block_len;
|
|
struct sk_buff *skb2;
|
|
int ret = -EINVAL;
|
|
unsigned ntb_max = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
|
|
unsigned frame_max;
|
|
const struct ndp_parser_opts *opts = ncm->parser_opts;
|
|
unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
|
|
int dgram_counter;
|
|
int to_process = skb->len;
|
|
struct f_ncm_opts *ncm_opts;
|
|
|
|
ncm_opts = container_of(port->func.fi, struct f_ncm_opts, func_inst);
|
|
frame_max = ncm_opts->max_segment_size;
|
|
|
|
parse_ntb:
|
|
tmp = (__le16 *)ntb_ptr;
|
|
|
|
/* dwSignature */
|
|
if (get_unaligned_le32(tmp) != opts->nth_sign) {
|
|
INFO(port->func.config->cdev, "Wrong NTH SIGN, skblen %d\n",
|
|
skb->len);
|
|
print_hex_dump(KERN_INFO, "HEAD:", DUMP_PREFIX_ADDRESS, 32, 1,
|
|
skb->data, 32, false);
|
|
|
|
goto err;
|
|
}
|
|
tmp += 2;
|
|
/* wHeaderLength */
|
|
if (get_unaligned_le16(tmp++) != opts->nth_size) {
|
|
INFO(port->func.config->cdev, "Wrong NTB headersize\n");
|
|
goto err;
|
|
}
|
|
tmp++; /* skip wSequence */
|
|
|
|
block_len = get_ncm(&tmp, opts->block_length);
|
|
/* (d)wBlockLength */
|
|
if (block_len > ntb_max) {
|
|
INFO(port->func.config->cdev, "OUT size exceeded\n");
|
|
goto err;
|
|
}
|
|
|
|
ndp_index = get_ncm(&tmp, opts->ndp_index);
|
|
|
|
/* Run through all the NDP's in the NTB */
|
|
do {
|
|
/*
|
|
* NCM 3.2
|
|
* dwNdpIndex
|
|
*/
|
|
if (((ndp_index % 4) != 0) ||
|
|
(ndp_index < opts->nth_size) ||
|
|
(ndp_index > (block_len -
|
|
opts->ndp_size))) {
|
|
INFO(port->func.config->cdev, "Bad index: %#X\n",
|
|
ndp_index);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* walk through NDP
|
|
* dwSignature
|
|
*/
|
|
tmp = (__le16 *)(ntb_ptr + ndp_index);
|
|
if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
|
|
INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
|
|
goto err;
|
|
}
|
|
tmp += 2;
|
|
|
|
ndp_len = get_unaligned_le16(tmp++);
|
|
/*
|
|
* NCM 3.3.1
|
|
* wLength
|
|
* entry is 2 items
|
|
* item size is 16/32 bits, opts->dgram_item_len * 2 bytes
|
|
* minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry
|
|
* Each entry is a dgram index and a dgram length.
|
|
*/
|
|
if ((ndp_len < opts->ndp_size
|
|
+ 2 * 2 * (opts->dgram_item_len * 2)) ||
|
|
(ndp_len % opts->ndplen_align != 0)) {
|
|
INFO(port->func.config->cdev, "Bad NDP length: %#X\n",
|
|
ndp_len);
|
|
goto err;
|
|
}
|
|
tmp += opts->reserved1;
|
|
/* Check for another NDP (d)wNextNdpIndex */
|
|
ndp_index = get_ncm(&tmp, opts->next_ndp_index);
|
|
tmp += opts->reserved2;
|
|
|
|
ndp_len -= opts->ndp_size;
|
|
index2 = get_ncm(&tmp, opts->dgram_item_len);
|
|
dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
|
|
dgram_counter = 0;
|
|
|
|
do {
|
|
index = index2;
|
|
/* wDatagramIndex[0] */
|
|
if ((index < opts->nth_size) ||
|
|
(index > block_len - opts->dpe_size)) {
|
|
INFO(port->func.config->cdev,
|
|
"Bad index: %#X\n", index);
|
|
goto err;
|
|
}
|
|
|
|
dg_len = dg_len2;
|
|
/*
|
|
* wDatagramLength[0]
|
|
* ethernet hdr + crc or larger than max frame size
|
|
*/
|
|
if ((dg_len < 14 + crc_len) ||
|
|
(dg_len > frame_max)) {
|
|
INFO(port->func.config->cdev,
|
|
"Bad dgram length: %#X\n", dg_len);
|
|
goto err;
|
|
}
|
|
if (ncm->is_crc) {
|
|
uint32_t crc, crc2;
|
|
|
|
crc = get_unaligned_le32(ntb_ptr +
|
|
index + dg_len -
|
|
crc_len);
|
|
crc2 = ~crc32_le(~0,
|
|
ntb_ptr + index,
|
|
dg_len - crc_len);
|
|
if (crc != crc2) {
|
|
INFO(port->func.config->cdev,
|
|
"Bad CRC\n");
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
index2 = get_ncm(&tmp, opts->dgram_item_len);
|
|
dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
|
|
|
|
/* wDatagramIndex[1] */
|
|
if (index2 > block_len - opts->dpe_size) {
|
|
INFO(port->func.config->cdev,
|
|
"Bad index: %#X\n", index2);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Copy the data into a new skb.
|
|
* This ensures the truesize is correct
|
|
*/
|
|
skb2 = netdev_alloc_skb_ip_align(ncm->netdev,
|
|
dg_len - crc_len);
|
|
if (skb2 == NULL)
|
|
goto err;
|
|
skb_put_data(skb2, ntb_ptr + index,
|
|
dg_len - crc_len);
|
|
|
|
skb_queue_tail(list, skb2);
|
|
|
|
ndp_len -= 2 * (opts->dgram_item_len * 2);
|
|
|
|
dgram_counter++;
|
|
if (index2 == 0 || dg_len2 == 0)
|
|
break;
|
|
} while (ndp_len > 2 * (opts->dgram_item_len * 2));
|
|
} while (ndp_index);
|
|
|
|
VDBG(port->func.config->cdev,
|
|
"Parsed NTB with %d frames\n", dgram_counter);
|
|
|
|
to_process -= block_len;
|
|
|
|
/*
|
|
* Windows NCM driver avoids USB ZLPs by adding a 1-byte
|
|
* zero pad as needed.
|
|
*/
|
|
if (to_process == 1 &&
|
|
(*(unsigned char *)(ntb_ptr + block_len) == 0x00)) {
|
|
to_process--;
|
|
} else if ((to_process > 0) && (block_len != 0)) {
|
|
ntb_ptr = (unsigned char *)(ntb_ptr + block_len);
|
|
goto parse_ntb;
|
|
}
|
|
|
|
dev_consume_skb_any(skb);
|
|
|
|
return 0;
|
|
err:
|
|
skb_queue_purge(list);
|
|
dev_kfree_skb_any(skb);
|
|
return ret;
|
|
}
|
|
|
|
static void ncm_disable(struct usb_function *f)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
struct usb_composite_dev *cdev = f->config->cdev;
|
|
|
|
DBG(cdev, "ncm deactivated\n");
|
|
|
|
if (ncm->netdev) {
|
|
ncm->netdev = NULL;
|
|
gether_disconnect(&ncm->port);
|
|
}
|
|
|
|
if (ncm->notify->enabled) {
|
|
usb_ep_disable(ncm->notify);
|
|
ncm->notify->desc = NULL;
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* Callbacks let us notify the host about connect/disconnect when the
|
|
* net device is opened or closed.
|
|
*
|
|
* For testing, note that link states on this side include both opened
|
|
* and closed variants of:
|
|
*
|
|
* - disconnected/unconfigured
|
|
* - configured but inactive (data alt 0)
|
|
* - configured and active (data alt 1)
|
|
*
|
|
* Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and
|
|
* SET_INTERFACE (altsetting). Remember also that "configured" doesn't
|
|
* imply the host is actually polling the notification endpoint, and
|
|
* likewise that "active" doesn't imply it's actually using the data
|
|
* endpoints for traffic.
|
|
*/
|
|
|
|
static void ncm_open(struct gether *geth)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(&geth->func);
|
|
|
|
DBG(ncm->port.func.config->cdev, "%s\n", __func__);
|
|
|
|
spin_lock(&ncm->lock);
|
|
ncm->is_open = true;
|
|
ncm_notify(ncm);
|
|
spin_unlock(&ncm->lock);
|
|
}
|
|
|
|
static void ncm_close(struct gether *geth)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(&geth->func);
|
|
|
|
DBG(ncm->port.func.config->cdev, "%s\n", __func__);
|
|
|
|
spin_lock(&ncm->lock);
|
|
ncm->is_open = false;
|
|
ncm_notify(ncm);
|
|
spin_unlock(&ncm->lock);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* ethernet function driver setup/binding */
|
|
|
|
static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
|
|
{
|
|
struct usb_composite_dev *cdev = c->cdev;
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
struct usb_string *us;
|
|
int status = 0;
|
|
struct usb_ep *ep;
|
|
struct f_ncm_opts *ncm_opts;
|
|
|
|
if (!can_support_ecm(cdev->gadget))
|
|
return -EINVAL;
|
|
|
|
ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
|
|
|
|
if (cdev->use_os_string) {
|
|
f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
|
|
GFP_KERNEL);
|
|
if (!f->os_desc_table)
|
|
return -ENOMEM;
|
|
f->os_desc_n = 1;
|
|
f->os_desc_table[0].os_desc = &ncm_opts->ncm_os_desc;
|
|
}
|
|
|
|
mutex_lock(&ncm_opts->lock);
|
|
gether_set_gadget(ncm_opts->net, cdev->gadget);
|
|
if (!ncm_opts->bound) {
|
|
ncm_opts->net->mtu = (ncm_opts->max_segment_size - ETH_HLEN);
|
|
status = gether_register_netdev(ncm_opts->net);
|
|
}
|
|
mutex_unlock(&ncm_opts->lock);
|
|
|
|
if (status)
|
|
goto fail;
|
|
|
|
ncm_opts->bound = true;
|
|
|
|
us = usb_gstrings_attach(cdev, ncm_strings,
|
|
ARRAY_SIZE(ncm_string_defs));
|
|
if (IS_ERR(us)) {
|
|
status = PTR_ERR(us);
|
|
goto fail;
|
|
}
|
|
ncm_control_intf.iInterface = us[STRING_CTRL_IDX].id;
|
|
ncm_data_nop_intf.iInterface = us[STRING_DATA_IDX].id;
|
|
ncm_data_intf.iInterface = us[STRING_DATA_IDX].id;
|
|
ecm_desc.iMACAddress = us[STRING_MAC_IDX].id;
|
|
ncm_iad_desc.iFunction = us[STRING_IAD_IDX].id;
|
|
|
|
/* allocate instance-specific interface IDs */
|
|
status = usb_interface_id(c, f);
|
|
if (status < 0)
|
|
goto fail;
|
|
ncm->ctrl_id = status;
|
|
ncm_iad_desc.bFirstInterface = status;
|
|
|
|
ncm_control_intf.bInterfaceNumber = status;
|
|
ncm_union_desc.bMasterInterface0 = status;
|
|
|
|
if (cdev->use_os_string)
|
|
f->os_desc_table[0].if_id =
|
|
ncm_iad_desc.bFirstInterface;
|
|
|
|
status = usb_interface_id(c, f);
|
|
if (status < 0)
|
|
goto fail;
|
|
ncm->data_id = status;
|
|
|
|
ncm_data_nop_intf.bInterfaceNumber = status;
|
|
ncm_data_intf.bInterfaceNumber = status;
|
|
ncm_union_desc.bSlaveInterface0 = status;
|
|
|
|
ecm_desc.wMaxSegmentSize = cpu_to_le16(ncm_opts->max_segment_size);
|
|
|
|
status = -ENODEV;
|
|
|
|
/* allocate instance-specific endpoints */
|
|
ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_in_desc);
|
|
if (!ep)
|
|
goto fail;
|
|
ncm->port.in_ep = ep;
|
|
|
|
ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_out_desc);
|
|
if (!ep)
|
|
goto fail;
|
|
ncm->port.out_ep = ep;
|
|
|
|
ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_notify_desc);
|
|
if (!ep)
|
|
goto fail;
|
|
ncm->notify = ep;
|
|
|
|
status = -ENOMEM;
|
|
|
|
/* allocate notification request and buffer */
|
|
ncm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
|
|
if (!ncm->notify_req)
|
|
goto fail;
|
|
ncm->notify_req->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL);
|
|
if (!ncm->notify_req->buf)
|
|
goto fail;
|
|
ncm->notify_req->context = ncm;
|
|
ncm->notify_req->complete = ncm_notify_complete;
|
|
|
|
/*
|
|
* support all relevant hardware speeds... we expect that when
|
|
* hardware is dual speed, all bulk-capable endpoints work at
|
|
* both speeds
|
|
*/
|
|
hs_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
|
|
hs_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
|
|
hs_ncm_notify_desc.bEndpointAddress =
|
|
fs_ncm_notify_desc.bEndpointAddress;
|
|
|
|
ss_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
|
|
ss_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
|
|
ss_ncm_notify_desc.bEndpointAddress =
|
|
fs_ncm_notify_desc.bEndpointAddress;
|
|
|
|
status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function,
|
|
ncm_ss_function, ncm_ss_function);
|
|
if (status)
|
|
goto fail;
|
|
|
|
/*
|
|
* NOTE: all that is done without knowing or caring about
|
|
* the network link ... which is unavailable to this code
|
|
* until we're activated via set_alt().
|
|
*/
|
|
|
|
ncm->port.open = ncm_open;
|
|
ncm->port.close = ncm_close;
|
|
|
|
hrtimer_init(&ncm->task_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);
|
|
ncm->task_timer.function = ncm_tx_timeout;
|
|
|
|
DBG(cdev, "CDC Network: IN/%s OUT/%s NOTIFY/%s\n",
|
|
ncm->port.in_ep->name, ncm->port.out_ep->name,
|
|
ncm->notify->name);
|
|
return 0;
|
|
|
|
fail:
|
|
kfree(f->os_desc_table);
|
|
f->os_desc_n = 0;
|
|
|
|
if (ncm->notify_req) {
|
|
kfree(ncm->notify_req->buf);
|
|
usb_ep_free_request(ncm->notify, ncm->notify_req);
|
|
}
|
|
|
|
ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
static inline struct f_ncm_opts *to_f_ncm_opts(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct f_ncm_opts,
|
|
func_inst.group);
|
|
}
|
|
|
|
/* f_ncm_item_ops */
|
|
USB_ETHERNET_CONFIGFS_ITEM(ncm);
|
|
|
|
/* f_ncm_opts_dev_addr */
|
|
USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ncm);
|
|
|
|
/* f_ncm_opts_host_addr */
|
|
USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ncm);
|
|
|
|
/* f_ncm_opts_qmult */
|
|
USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ncm);
|
|
|
|
/* f_ncm_opts_ifname */
|
|
USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ncm);
|
|
|
|
static ssize_t ncm_opts_max_segment_size_show(struct config_item *item,
|
|
char *page)
|
|
{
|
|
struct f_ncm_opts *opts = to_f_ncm_opts(item);
|
|
u16 segment_size;
|
|
|
|
mutex_lock(&opts->lock);
|
|
segment_size = opts->max_segment_size;
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return sysfs_emit(page, "%u\n", segment_size);
|
|
}
|
|
|
|
static ssize_t ncm_opts_max_segment_size_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ncm_opts *opts = to_f_ncm_opts(item);
|
|
u16 segment_size;
|
|
int ret;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
ret = kstrtou16(page, 0, &segment_size);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (segment_size > MAX_DATAGRAM_SIZE) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
opts->max_segment_size = segment_size;
|
|
ret = len;
|
|
out:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(ncm_opts_, max_segment_size);
|
|
|
|
static struct configfs_attribute *ncm_attrs[] = {
|
|
&ncm_opts_attr_dev_addr,
|
|
&ncm_opts_attr_host_addr,
|
|
&ncm_opts_attr_qmult,
|
|
&ncm_opts_attr_ifname,
|
|
&ncm_opts_attr_max_segment_size,
|
|
NULL,
|
|
};
|
|
|
|
static const struct config_item_type ncm_func_type = {
|
|
.ct_item_ops = &ncm_item_ops,
|
|
.ct_attrs = ncm_attrs,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static void ncm_free_inst(struct usb_function_instance *f)
|
|
{
|
|
struct f_ncm_opts *opts;
|
|
|
|
opts = container_of(f, struct f_ncm_opts, func_inst);
|
|
if (opts->bound)
|
|
gether_cleanup(netdev_priv(opts->net));
|
|
else
|
|
free_netdev(opts->net);
|
|
kfree(opts->ncm_interf_group);
|
|
kfree(opts);
|
|
}
|
|
|
|
static struct usb_function_instance *ncm_alloc_inst(void)
|
|
{
|
|
struct f_ncm_opts *opts;
|
|
struct usb_os_desc *descs[1];
|
|
char *names[1];
|
|
struct config_group *ncm_interf_group;
|
|
|
|
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
|
|
if (!opts)
|
|
return ERR_PTR(-ENOMEM);
|
|
opts->ncm_os_desc.ext_compat_id = opts->ncm_ext_compat_id;
|
|
|
|
mutex_init(&opts->lock);
|
|
opts->func_inst.free_func_inst = ncm_free_inst;
|
|
opts->net = gether_setup_default();
|
|
if (IS_ERR(opts->net)) {
|
|
struct net_device *net = opts->net;
|
|
kfree(opts);
|
|
return ERR_CAST(net);
|
|
}
|
|
opts->max_segment_size = ETH_FRAME_LEN;
|
|
INIT_LIST_HEAD(&opts->ncm_os_desc.ext_prop);
|
|
|
|
descs[0] = &opts->ncm_os_desc;
|
|
names[0] = "ncm";
|
|
|
|
config_group_init_type_name(&opts->func_inst.group, "", &ncm_func_type);
|
|
ncm_interf_group =
|
|
usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
|
|
names, THIS_MODULE);
|
|
if (IS_ERR(ncm_interf_group)) {
|
|
ncm_free_inst(&opts->func_inst);
|
|
return ERR_CAST(ncm_interf_group);
|
|
}
|
|
opts->ncm_interf_group = ncm_interf_group;
|
|
|
|
return &opts->func_inst;
|
|
}
|
|
|
|
static void ncm_free(struct usb_function *f)
|
|
{
|
|
struct f_ncm *ncm;
|
|
struct f_ncm_opts *opts;
|
|
|
|
ncm = func_to_ncm(f);
|
|
opts = container_of(f->fi, struct f_ncm_opts, func_inst);
|
|
kfree(ncm);
|
|
mutex_lock(&opts->lock);
|
|
opts->refcnt--;
|
|
mutex_unlock(&opts->lock);
|
|
}
|
|
|
|
static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
|
|
{
|
|
struct f_ncm *ncm = func_to_ncm(f);
|
|
|
|
DBG(c->cdev, "ncm unbind\n");
|
|
|
|
hrtimer_cancel(&ncm->task_timer);
|
|
|
|
kfree(f->os_desc_table);
|
|
f->os_desc_n = 0;
|
|
|
|
ncm_string_defs[0].id = 0;
|
|
usb_free_all_descriptors(f);
|
|
|
|
if (atomic_read(&ncm->notify_count)) {
|
|
usb_ep_dequeue(ncm->notify, ncm->notify_req);
|
|
atomic_set(&ncm->notify_count, 0);
|
|
}
|
|
|
|
kfree(ncm->notify_req->buf);
|
|
usb_ep_free_request(ncm->notify, ncm->notify_req);
|
|
}
|
|
|
|
static struct usb_function *ncm_alloc(struct usb_function_instance *fi)
|
|
{
|
|
struct f_ncm *ncm;
|
|
struct f_ncm_opts *opts;
|
|
int status;
|
|
|
|
/* allocate and initialize one new instance */
|
|
ncm = kzalloc(sizeof(*ncm), GFP_KERNEL);
|
|
if (!ncm)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
opts = container_of(fi, struct f_ncm_opts, func_inst);
|
|
mutex_lock(&opts->lock);
|
|
opts->refcnt++;
|
|
|
|
/* export host's Ethernet address in CDC format */
|
|
status = gether_get_host_addr_cdc(opts->net, ncm->ethaddr,
|
|
sizeof(ncm->ethaddr));
|
|
if (status < 12) { /* strlen("01234567890a") */
|
|
kfree(ncm);
|
|
mutex_unlock(&opts->lock);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
ncm_string_defs[STRING_MAC_IDX].s = ncm->ethaddr;
|
|
|
|
spin_lock_init(&ncm->lock);
|
|
ncm_reset_values(ncm);
|
|
ncm->port.ioport = netdev_priv(opts->net);
|
|
mutex_unlock(&opts->lock);
|
|
ncm->port.is_fixed = true;
|
|
ncm->port.supports_multi_frame = true;
|
|
|
|
ncm->port.func.name = "cdc_network";
|
|
/* descriptors are per-instance copies */
|
|
ncm->port.func.bind = ncm_bind;
|
|
ncm->port.func.unbind = ncm_unbind;
|
|
ncm->port.func.set_alt = ncm_set_alt;
|
|
ncm->port.func.get_alt = ncm_get_alt;
|
|
ncm->port.func.setup = ncm_setup;
|
|
ncm->port.func.disable = ncm_disable;
|
|
ncm->port.func.free_func = ncm_free;
|
|
|
|
ncm->port.wrap = ncm_wrap_ntb;
|
|
ncm->port.unwrap = ncm_unwrap_ntb;
|
|
|
|
return &ncm->port.func;
|
|
}
|
|
|
|
DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc);
|
|
MODULE_DESCRIPTION("USB CDC Network (NCM) link function driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Yauheni Kaliuta");
|