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40#ifndef __LINUX_USB_CDC_NCM_H
41#define __LINUX_USB_CDC_NCM_H
42
43#define CDC_NCM_COMM_ALTSETTING_NCM 0
44#define CDC_NCM_COMM_ALTSETTING_MBIM 1
45
46#define CDC_NCM_DATA_ALTSETTING_NCM 1
47#define CDC_NCM_DATA_ALTSETTING_MBIM 2
48
49
50#define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10
51
52
53#define CDC_NCM_NTB_MAX_SIZE_TX 32768
54#define CDC_NCM_NTB_MAX_SIZE_RX 32768
55
56
57#define CDC_NCM_NTB_DEF_SIZE_TX 16384
58#define CDC_NCM_NTB_DEF_SIZE_RX 16384
59
60
61#define CDC_NCM_MIN_DATAGRAM_SIZE 1514
62
63
64#define CDC_MBIM_MIN_DATAGRAM_SIZE 2048
65
66#define CDC_NCM_MIN_TX_PKT 512
67
68
69#define CDC_NCM_MAX_DATAGRAM_SIZE 8192
70
71
72
73
74
75#define CDC_NCM_DPT_DATAGRAMS_MAX 40
76
77
78#define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3
79#define CDC_NCM_TIMER_PENDING_CNT 2
80#define CDC_NCM_TIMER_INTERVAL_USEC 400UL
81#define CDC_NCM_TIMER_INTERVAL_MIN 5UL
82#define CDC_NCM_TIMER_INTERVAL_MAX (U32_MAX / NSEC_PER_USEC)
83
84
85#define CDC_NCM_FLAG_NDP_TO_END 0x02
86#define CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 0x04
87#define CDC_NCM_FLAG_RESET_NTB16 0x08
88
89#define cdc_ncm_comm_intf_is_mbim(x) ((x)->desc.bInterfaceSubClass == USB_CDC_SUBCLASS_MBIM && \
90 (x)->desc.bInterfaceProtocol == USB_CDC_PROTO_NONE)
91#define cdc_ncm_data_intf_is_mbim(x) ((x)->desc.bInterfaceProtocol == USB_CDC_MBIM_PROTO_NTB)
92
93struct cdc_ncm_ctx {
94 struct usb_cdc_ncm_ntb_parameters ncm_parm;
95 struct hrtimer tx_timer;
96 struct tasklet_struct bh;
97
98 const struct usb_cdc_ncm_desc *func_desc;
99 const struct usb_cdc_mbim_desc *mbim_desc;
100 const struct usb_cdc_mbim_extended_desc *mbim_extended_desc;
101 const struct usb_cdc_ether_desc *ether_desc;
102
103 struct usb_interface *control;
104 struct usb_interface *data;
105
106 struct sk_buff *tx_curr_skb;
107 struct sk_buff *tx_rem_skb;
108 __le32 tx_rem_sign;
109
110 spinlock_t mtx;
111 atomic_t stop;
112 int drvflags;
113
114 u32 timer_interval;
115 u32 max_ndp_size;
116 struct usb_cdc_ncm_ndp16 *delayed_ndp16;
117
118 u32 tx_timer_pending;
119 u32 tx_curr_frame_num;
120 u32 rx_max;
121 u32 tx_max;
122 u32 tx_curr_size;
123 u32 tx_low_mem_max_cnt;
124 u32 tx_low_mem_val;
125 u32 max_datagram_size;
126 u16 tx_max_datagrams;
127 u16 tx_remainder;
128 u16 tx_modulus;
129 u16 tx_ndp_modulus;
130 u16 tx_seq;
131 u16 rx_seq;
132 u16 min_tx_pkt;
133
134
135 u32 tx_curr_frame_payload;
136 u32 tx_reason_ntb_full;
137 u32 tx_reason_ndp_full;
138 u32 tx_reason_timeout;
139 u32 tx_reason_max_datagram;
140 u64 tx_overhead;
141 u64 tx_ntbs;
142 u64 rx_overhead;
143 u64 rx_ntbs;
144};
145
146u8 cdc_ncm_select_altsetting(struct usb_interface *intf);
147int cdc_ncm_change_mtu(struct net_device *net, int new_mtu);
148int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags);
149void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf);
150struct sk_buff *cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign);
151int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in);
152int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset);
153struct sk_buff *
154cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags);
155int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in);
156
157#endif
158
