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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 USB_CDC_NCM_NDP32_LENGTH_MIN 0x20
54
55
56#define CDC_NCM_NTB_MAX_SIZE_TX 32768
57#define CDC_NCM_NTB_MAX_SIZE_RX 32768
58
59
60#define CDC_NCM_NTB_DEF_SIZE_TX 16384
61#define CDC_NCM_NTB_DEF_SIZE_RX 16384
62
63
64#define CDC_NCM_MIN_DATAGRAM_SIZE 1514
65
66
67#define CDC_MBIM_MIN_DATAGRAM_SIZE 2048
68
69#define CDC_NCM_MIN_TX_PKT 512
70
71
72#define CDC_NCM_MAX_DATAGRAM_SIZE 8192
73
74
75
76
77
78#define CDC_NCM_DPT_DATAGRAMS_MAX 40
79
80
81#define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3
82#define CDC_NCM_TIMER_PENDING_CNT 2
83#define CDC_NCM_TIMER_INTERVAL_USEC 400UL
84#define CDC_NCM_TIMER_INTERVAL_MIN 5UL
85#define CDC_NCM_TIMER_INTERVAL_MAX (U32_MAX / NSEC_PER_USEC)
86
87
88#define CDC_NCM_FLAG_NDP_TO_END 0x02
89#define CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 0x04
90#define CDC_NCM_FLAG_PREFER_NTB32 0x08
91
92#define cdc_ncm_comm_intf_is_mbim(x) ((x)->desc.bInterfaceSubClass == USB_CDC_SUBCLASS_MBIM && \
93 (x)->desc.bInterfaceProtocol == USB_CDC_PROTO_NONE)
94#define cdc_ncm_data_intf_is_mbim(x) ((x)->desc.bInterfaceProtocol == USB_CDC_MBIM_PROTO_NTB)
95
96struct cdc_ncm_ctx {
97 struct usb_cdc_ncm_ntb_parameters ncm_parm;
98 struct hrtimer tx_timer;
99 struct tasklet_struct bh;
100
101 struct usbnet *dev;
102
103 const struct usb_cdc_ncm_desc *func_desc;
104 const struct usb_cdc_mbim_desc *mbim_desc;
105 const struct usb_cdc_mbim_extended_desc *mbim_extended_desc;
106 const struct usb_cdc_ether_desc *ether_desc;
107
108 struct usb_interface *control;
109 struct usb_interface *data;
110
111 struct sk_buff *tx_curr_skb;
112 struct sk_buff *tx_rem_skb;
113 __le32 tx_rem_sign;
114
115 spinlock_t mtx;
116 atomic_t stop;
117 int drvflags;
118
119 u32 timer_interval;
120 u32 max_ndp_size;
121 u8 is_ndp16;
122 union {
123 struct usb_cdc_ncm_ndp16 *delayed_ndp16;
124 struct usb_cdc_ncm_ndp32 *delayed_ndp32;
125 };
126
127 u32 tx_timer_pending;
128 u32 tx_curr_frame_num;
129 u32 rx_max;
130 u32 tx_max;
131 u32 tx_curr_size;
132 u32 tx_low_mem_max_cnt;
133 u32 tx_low_mem_val;
134 u32 max_datagram_size;
135 u16 tx_max_datagrams;
136 u16 tx_remainder;
137 u16 tx_modulus;
138 u16 tx_ndp_modulus;
139 u16 tx_seq;
140 u16 rx_seq;
141 u16 min_tx_pkt;
142
143
144 u32 tx_curr_frame_payload;
145 u32 tx_reason_ntb_full;
146 u32 tx_reason_ndp_full;
147 u32 tx_reason_timeout;
148 u32 tx_reason_max_datagram;
149 u64 tx_overhead;
150 u64 tx_ntbs;
151 u64 rx_overhead;
152 u64 rx_ntbs;
153};
154
155u8 cdc_ncm_select_altsetting(struct usb_interface *intf);
156int cdc_ncm_change_mtu(struct net_device *net, int new_mtu);
157int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags);
158void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf);
159struct sk_buff *cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign);
160int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in);
161int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset);
162int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in);
163int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset);
164struct sk_buff *
165cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags);
166int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in);
167
168#endif
169
