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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170// SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)/* * Copyright (C) ST-Ericsson 2010-2012 * Contact: Alexey Orishko <alexey.orishko@stericsson.com> * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> * * USB Host Driver for Network Control Model (NCM) * http://www.usb.org/developers/devclass_docs/NCM10.zip * * The NCM encoding, decoding and initialization logic * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h * * This software is available to you under a choice of one of two * licenses. You may choose this file to be licensed under the terms * of the GNU General Public License (GPL) Version 2 or the 2-clause * BSD license listed below: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */
#ifndef __LINUX_USB_CDC_NCM_H#define __LINUX_USB_CDC_NCM_H
#define CDC_NCM_COMM_ALTSETTING_NCM 0#define CDC_NCM_COMM_ALTSETTING_MBIM 1
#define CDC_NCM_DATA_ALTSETTING_NCM 1#define CDC_NCM_DATA_ALTSETTING_MBIM 2
/* CDC NCM subclass 3.3.1 */#define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10
/* CDC NCM subclass 3.3.2 */#define USB_CDC_NCM_NDP32_LENGTH_MIN 0x20
/* Maximum NTB length */#define CDC_NCM_NTB_MAX_SIZE_TX 65536 /* bytes */#define CDC_NCM_NTB_MAX_SIZE_RX 65536 /* bytes */
/* Initial NTB length */#define CDC_NCM_NTB_DEF_SIZE_TX 16384 /* bytes */#define CDC_NCM_NTB_DEF_SIZE_RX 16384 /* bytes */
/* Minimum value for MaxDatagramSize, ch. 6.2.9 */#define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */
/* Minimum value for MaxDatagramSize, ch. 8.1.3 */#define CDC_MBIM_MIN_DATAGRAM_SIZE 2048 /* bytes */
#define CDC_NCM_MIN_TX_PKT 512 /* bytes */
/* Default value for MaxDatagramSize */#define CDC_NCM_MAX_DATAGRAM_SIZE 8192 /* bytes */
/* * Maximum amount of datagrams in NCM Datagram Pointer Table, not counting * the last NULL entry. */#define CDC_NCM_DPT_DATAGRAMS_MAX 40
/* Restart the timer, if amount of datagrams is less than given value */#define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3#define CDC_NCM_TIMER_PENDING_CNT 2#define CDC_NCM_TIMER_INTERVAL_USEC 400UL#define CDC_NCM_TIMER_INTERVAL_MIN 5UL#define CDC_NCM_TIMER_INTERVAL_MAX (U32_MAX / NSEC_PER_USEC)
/* Driver flags */#define CDC_NCM_FLAG_NDP_TO_END 0x02 /* NDP is placed at end of frame */#define CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 0x04 /* Avoid altsetting toggle during init */#define CDC_NCM_FLAG_PREFER_NTB32 0x08 /* prefer NDP32 over NDP16 */
#define cdc_ncm_comm_intf_is_mbim(x) ((x)->desc.bInterfaceSubClass == USB_CDC_SUBCLASS_MBIM && \ (x)->desc.bInterfaceProtocol == USB_CDC_PROTO_NONE)#define cdc_ncm_data_intf_is_mbim(x) ((x)->desc.bInterfaceProtocol == USB_CDC_MBIM_PROTO_NTB)
struct cdc_ncm_ctx { struct usb_cdc_ncm_ntb_parameters ncm_parm; struct hrtimer tx_timer; struct tasklet_struct bh;
struct usbnet *dev;
const struct usb_cdc_ncm_desc *func_desc; const struct usb_cdc_mbim_desc *mbim_desc; const struct usb_cdc_mbim_extended_desc *mbim_extended_desc; const struct usb_cdc_ether_desc *ether_desc;
struct usb_interface *control; struct usb_interface *data;
struct sk_buff *tx_curr_skb; struct sk_buff *tx_rem_skb; __le32 tx_rem_sign;
spinlock_t mtx; atomic_t stop; int drvflags;
u32 timer_interval; u32 max_ndp_size; bool is_ndp16; bool filtering_supported; union { struct usb_cdc_ncm_ndp16 *delayed_ndp16; struct usb_cdc_ncm_ndp32 *delayed_ndp32; };
u32 tx_timer_pending; u32 tx_curr_frame_num; u32 rx_max; u32 tx_max; u32 tx_curr_size; u32 tx_low_mem_max_cnt; u32 tx_low_mem_val; u32 max_datagram_size; u16 tx_max_datagrams; u16 tx_remainder; u16 tx_modulus; u16 tx_ndp_modulus; u16 tx_seq; u16 rx_seq; u16 min_tx_pkt;
/* statistics */ u32 tx_curr_frame_payload; u32 tx_reason_ntb_full; u32 tx_reason_ndp_full; u32 tx_reason_timeout; u32 tx_reason_max_datagram; u64 tx_overhead; u64 tx_ntbs; u64 rx_overhead; u64 rx_ntbs;};
u8 cdc_ncm_select_altsetting(struct usb_interface *intf);int cdc_ncm_change_mtu(struct net_device *net, int new_mtu);int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags);void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf);struct sk_buff *cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign);int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in);int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset);int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in);int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset);struct sk_buff *cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags);int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in);
#endif /* __LINUX_USB_CDC_NCM_H */