50  144# SPDX-License-Identifier: GPL-2.0-only CFLAGS = -Wall TEST_GEN_FILES := open-unlink create-read TEST_PROGS := efivarfs.sh include ../lib.mk "lm_J*j"T ZӪbѿ h1  t/_I|+/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright(c) 2007 Intel Corporation. All rights reserved. * * Maintained at www.Open-FCoE.org */ #ifndef _FC_FRAME_H_ #define _FC_FRAME_H_ #include #include #include #include #include #include #include /* some helpful macros */ #define ntohll(x) be64_to_cpu(x) #define htonll(x) cpu_to_be64(x) static inline u32 ntoh24(const u8 *p) { return (p[0] << 16) | (p[1] << 8) | p[2]; } static inline void hton24(u8 *p, u32 v) { p[0] = (v >> 16) & 0xff; p[1] = (v >> 8) & 0xff; p[2] = v & 0xff; } /* * The fc_frame interface is used to pass frame data between functions. * The frame includes the data buffer, length, and SOF / EOF delimiter types. * A pointer to the port structure of the receiving port is also includeded. */ #define FC_FRAME_HEADROOM 32 /* headroom for VLAN + FCoE headers */ #define FC_FRAME_TAILROOM 8 /* trailer space for FCoE */ /* Max number of skb frags allowed, reserving one for fcoe_crc_eof page */ #define FC_FRAME_SG_LEN (MAX_SKB_FRAGS - 1) #define fp_skb(fp) (&((fp)->skb)) #define fr_hdr(fp) ((fp)->skb.data) #define fr_len(fp) ((fp)->skb.len) #define fr_cb(fp) ((struct fcoe_rcv_info *)&((fp)->skb.cb[0])) #define fr_dev(fp) (fr_cb(fp)->fr_dev) #define fr_seq(fp) (fr_cb(fp)->fr_seq) #define fr_sof(fp) (fr_cb(fp)->fr_sof) #define fr_eof(fp) (fr_cb(fp)->fr_eof) #define fr_flags(fp) (fr_cb(fp)->fr_flags) #define fr_encaps(fp) (fr_cb(fp)->fr_encaps) #define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload) #define fr_fsp(fp) (fr_cb(fp)->fr_fsp) #define fr_crc(fp) (fr_cb(fp)->fr_crc) struct fc_frame { struct sk_buff skb; }; struct fcoe_rcv_info { struct fc_lport *fr_dev; /* transport layer private pointer */ struct fc_seq *fr_seq; /* for use with exchange manager */ struct fc_fcp_pkt *fr_fsp; /* for the corresponding fcp I/O */ u32 fr_crc; u16 fr_max_payload; /* max FC payload */ u8 fr_sof; /* start of frame delimiter */ u8 fr_eof; /* end of frame delimiter */ u8 fr_flags; /* flags - see below */ u8 fr_encaps; /* LLD encapsulation info (e.g. FIP) */ u8 granted_mac[ETH_ALEN]; /* FCoE MAC address */ }; /* * Get fc_frame pointer for an skb that's already been imported. */ static inline struct fcoe_rcv_info *fcoe_dev_from_skb(const struct sk_buff *skb) { BUILD_BUG_ON(sizeof(struct fcoe_rcv_info) > sizeof(skb->cb)); return (struct fcoe_rcv_info *) skb->cb; } /* * fr_flags. */ #define FCPHF_CRC_UNCHECKED 0x01 /* CRC not computed, still appended */ /* * Initialize a frame. * We don't do a complete memset here for performance reasons. * The caller must set fr_free, fr_hdr, fr_len, fr_sof, and fr_eof eventually. */ static inline void fc_frame_init(struct fc_frame *fp) { fr_dev(fp) = NULL; fr_seq(fp) = NULL; fr_flags(fp) = 0; fr_encaps(fp) = 0; } struct fc_frame *fc_frame_alloc_fill(struct fc_lport *, size_t payload_len); struct fc_frame *_fc_frame_alloc(size_t payload_len); /* * Allocate fc_frame structure and buffer. Set the initial length to * payload_size + sizeof (struct fc_frame_header). */ static inline struct fc_frame *fc_frame_alloc(struct fc_lport *dev, size_t len) { struct fc_frame *fp; /* * Note: Since len will often be a constant multiple of 4, * this check will usually be evaluated and eliminated at compile time. */ if (len && len % 4) fp = fc_frame_alloc_fill(dev, len); else fp = _fc_frame_alloc(len); return fp; } /* * Free the fc_frame structure and buffer. */ static inline void fc_frame_free(struct fc_frame *fp) { kfree_skb(fp_skb(fp)); } static inline int fc_frame_is_linear(struct fc_frame *fp) { return !skb_is_nonlinear(fp_skb(fp)); } /* * Get frame header from message in fc_fr