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168 lines
5.8 KiB
168 lines
5.8 KiB
// SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
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/* |
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* Copyright (C) ST-Ericsson 2010-2012 |
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* Contact: Alexey Orishko <[email protected]> |
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* Original author: Hans Petter Selasky <[email protected]> |
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* |
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* USB Host Driver for Network Control Model (NCM) |
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* http://www.usb.org/developers/devclass_docs/NCM10.zip |
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* |
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* The NCM encoding, decoding and initialization logic |
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* derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose this file to be licensed under the terms |
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* of the GNU General Public License (GPL) Version 2 or the 2-clause |
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* BSD license listed below: |
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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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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#ifndef __LINUX_USB_CDC_NCM_H |
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#define __LINUX_USB_CDC_NCM_H |
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#define CDC_NCM_COMM_ALTSETTING_NCM 0 |
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#define CDC_NCM_COMM_ALTSETTING_MBIM 1 |
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#define CDC_NCM_DATA_ALTSETTING_NCM 1 |
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#define CDC_NCM_DATA_ALTSETTING_MBIM 2 |
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/* CDC NCM subclass 3.3.1 */ |
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#define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10 |
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/* CDC NCM subclass 3.3.2 */ |
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#define USB_CDC_NCM_NDP32_LENGTH_MIN 0x20 |
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/* Maximum NTB length */ |
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#define CDC_NCM_NTB_MAX_SIZE_TX 32768 /* bytes */ |
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#define CDC_NCM_NTB_MAX_SIZE_RX 32768 /* bytes */ |
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/* Initial NTB length */ |
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#define CDC_NCM_NTB_DEF_SIZE_TX 16384 /* bytes */ |
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#define CDC_NCM_NTB_DEF_SIZE_RX 16384 /* bytes */ |
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/* Minimum value for MaxDatagramSize, ch. 6.2.9 */ |
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#define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */ |
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/* Minimum value for MaxDatagramSize, ch. 8.1.3 */ |
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#define CDC_MBIM_MIN_DATAGRAM_SIZE 2048 /* bytes */ |
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#define CDC_NCM_MIN_TX_PKT 512 /* bytes */ |
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/* Default value for MaxDatagramSize */ |
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#define CDC_NCM_MAX_DATAGRAM_SIZE 8192 /* bytes */ |
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/* |
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* Maximum amount of datagrams in NCM Datagram Pointer Table, not counting |
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* the last NULL entry. |
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*/ |
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#define CDC_NCM_DPT_DATAGRAMS_MAX 40 |
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/* Restart the timer, if amount of datagrams is less than given value */ |
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#define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3 |
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#define CDC_NCM_TIMER_PENDING_CNT 2 |
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#define CDC_NCM_TIMER_INTERVAL_USEC 400UL |
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#define CDC_NCM_TIMER_INTERVAL_MIN 5UL |
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#define CDC_NCM_TIMER_INTERVAL_MAX (U32_MAX / NSEC_PER_USEC) |
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/* Driver flags */ |
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#define CDC_NCM_FLAG_NDP_TO_END 0x02 /* NDP is placed at end of frame */ |
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#define CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 0x04 /* Avoid altsetting toggle during init */ |
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#define CDC_NCM_FLAG_PREFER_NTB32 0x08 /* prefer NDP32 over NDP16 */ |
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#define cdc_ncm_comm_intf_is_mbim(x) ((x)->desc.bInterfaceSubClass == USB_CDC_SUBCLASS_MBIM && \ |
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(x)->desc.bInterfaceProtocol == USB_CDC_PROTO_NONE) |
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#define cdc_ncm_data_intf_is_mbim(x) ((x)->desc.bInterfaceProtocol == USB_CDC_MBIM_PROTO_NTB) |
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struct cdc_ncm_ctx { |
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struct usb_cdc_ncm_ntb_parameters ncm_parm; |
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struct hrtimer tx_timer; |
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struct tasklet_struct bh; |
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struct usbnet *dev; |
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const struct usb_cdc_ncm_desc *func_desc; |
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const struct usb_cdc_mbim_desc *mbim_desc; |
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const struct usb_cdc_mbim_extended_desc *mbim_extended_desc; |
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const struct usb_cdc_ether_desc *ether_desc; |
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struct usb_interface *control; |
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struct usb_interface *data; |
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struct sk_buff *tx_curr_skb; |
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struct sk_buff *tx_rem_skb; |
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__le32 tx_rem_sign; |
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spinlock_t mtx; |
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atomic_t stop; |
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int drvflags; |
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u32 timer_interval; |
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u32 max_ndp_size; |
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u8 is_ndp16; |
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union { |
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struct usb_cdc_ncm_ndp16 *delayed_ndp16; |
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struct usb_cdc_ncm_ndp32 *delayed_ndp32; |
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}; |
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u32 tx_timer_pending; |
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u32 tx_curr_frame_num; |
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u32 rx_max; |
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u32 tx_max; |
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u32 tx_curr_size; |
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u32 tx_low_mem_max_cnt; |
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u32 tx_low_mem_val; |
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u32 max_datagram_size; |
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u16 tx_max_datagrams; |
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u16 tx_remainder; |
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u16 tx_modulus; |
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u16 tx_ndp_modulus; |
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u16 tx_seq; |
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u16 rx_seq; |
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u16 min_tx_pkt; |
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/* statistics */ |
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u32 tx_curr_frame_payload; |
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u32 tx_reason_ntb_full; |
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u32 tx_reason_ndp_full; |
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u32 tx_reason_timeout; |
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u32 tx_reason_max_datagram; |
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u64 tx_overhead; |
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u64 tx_ntbs; |
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u64 rx_overhead; |
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u64 rx_ntbs; |
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}; |
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u8 cdc_ncm_select_altsetting(struct usb_interface *intf); |
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int cdc_ncm_change_mtu(struct net_device *net, int new_mtu); |
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int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags); |
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void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf); |
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struct sk_buff *cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign); |
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int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in); |
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int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset); |
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int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in); |
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int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset); |
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struct sk_buff * |
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cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags); |
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int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in); |
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#endif /* __LINUX_USB_CDC_NCM_H */
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