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cdc_ncm.h
// 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; u8 is_ndp16; 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 */
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