^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright(c) 2007 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Maintained at www.Open-FCoE.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #ifndef _FC_FRAME_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define _FC_FRAME_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <scsi/scsi_cmnd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <scsi/fc/fc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <scsi/fc/fc_fcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <scsi/fc/fc_encaps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* some helpful macros */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define ntohll(x) be64_to_cpu(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define htonll(x) cpu_to_be64(x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static inline u32 ntoh24(const u8 *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return (p[0] << 16) | (p[1] << 8) | p[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static inline void hton24(u8 *p, u32 v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) p[0] = (v >> 16) & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) p[1] = (v >> 8) & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) p[2] = v & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * The fc_frame interface is used to pass frame data between functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * The frame includes the data buffer, length, and SOF / EOF delimiter types.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * A pointer to the port structure of the receiving port is also includeded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define FC_FRAME_HEADROOM 32 /* headroom for VLAN + FCoE headers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define FC_FRAME_TAILROOM 8 /* trailer space for FCoE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* Max number of skb frags allowed, reserving one for fcoe_crc_eof page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define FC_FRAME_SG_LEN (MAX_SKB_FRAGS - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define fp_skb(fp) (&((fp)->skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define fr_hdr(fp) ((fp)->skb.data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define fr_len(fp) ((fp)->skb.len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define fr_cb(fp) ((struct fcoe_rcv_info *)&((fp)->skb.cb[0]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define fr_dev(fp) (fr_cb(fp)->fr_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define fr_seq(fp) (fr_cb(fp)->fr_seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define fr_sof(fp) (fr_cb(fp)->fr_sof)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define fr_eof(fp) (fr_cb(fp)->fr_eof)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define fr_flags(fp) (fr_cb(fp)->fr_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define fr_encaps(fp) (fr_cb(fp)->fr_encaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define fr_fsp(fp) (fr_cb(fp)->fr_fsp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define fr_crc(fp) (fr_cb(fp)->fr_crc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct fc_frame {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct sk_buff skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct fcoe_rcv_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct fc_lport *fr_dev; /* transport layer private pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct fc_seq *fr_seq; /* for use with exchange manager */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct fc_fcp_pkt *fr_fsp; /* for the corresponding fcp I/O */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u32 fr_crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) u16 fr_max_payload; /* max FC payload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u8 fr_sof; /* start of frame delimiter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) u8 fr_eof; /* end of frame delimiter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u8 fr_flags; /* flags - see below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) u8 fr_encaps; /* LLD encapsulation info (e.g. FIP) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) u8 granted_mac[ETH_ALEN]; /* FCoE MAC address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * Get fc_frame pointer for an skb that's already been imported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static inline struct fcoe_rcv_info *fcoe_dev_from_skb(const struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) BUILD_BUG_ON(sizeof(struct fcoe_rcv_info) > sizeof(skb->cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return (struct fcoe_rcv_info *) skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * fr_flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define FCPHF_CRC_UNCHECKED 0x01 /* CRC not computed, still appended */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * Initialize a frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * We don't do a complete memset here for performance reasons.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * The caller must set fr_free, fr_hdr, fr_len, fr_sof, and fr_eof eventually.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static inline void fc_frame_init(struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) fr_dev(fp) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) fr_seq(fp) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) fr_flags(fp) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) fr_encaps(fp) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct fc_frame *fc_frame_alloc_fill(struct fc_lport *, size_t payload_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct fc_frame *_fc_frame_alloc(size_t payload_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * Allocate fc_frame structure and buffer. Set the initial length to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * payload_size + sizeof (struct fc_frame_header).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static inline struct fc_frame *fc_frame_alloc(struct fc_lport *dev, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct fc_frame *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * Note: Since len will often be a constant multiple of 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * this check will usually be evaluated and eliminated at compile time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (len && len % 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) fp = fc_frame_alloc_fill(dev, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) fp = _fc_frame_alloc(len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * Free the fc_frame structure and buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static inline void fc_frame_free(struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) kfree_skb(fp_skb(fp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static inline int fc_frame_is_linear(struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return !skb_is_nonlinear(fp_skb(fp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * Get frame header from message in fc_frame structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * This version doesn't do a length check.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct fc_frame_header *__fc_frame_header_get(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return (struct fc_frame_header *)fr_hdr(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * Get frame header from message in fc_frame structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * This hides a cast and provides a place to add some checking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct fc_frame_header *fc_frame_header_get(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) WARN_ON(fr_len(fp) < sizeof(struct fc_frame_header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return __fc_frame_header_get(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * Get source FC_ID (S_ID) from frame header in message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static inline u32 fc_frame_sid(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return ntoh24(__fc_frame_header_get(fp)->fh_s_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * Get destination FC_ID (D_ID) from frame header in message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static inline u32 fc_frame_did(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return ntoh24(__fc_frame_header_get(fp)->fh_d_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * Get frame payload from message in fc_frame structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * This hides a cast and provides a place to add some checking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * The len parameter is the minimum length for the payload portion.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * Returns NULL if the frame is too short.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * This assumes the interesting part of the payload is in the first part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * of the buffer for received data. This may not be appropriate to use for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * buffers being transmitted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static inline void *fc_frame_payload_get(const struct fc_frame *fp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) void *pp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (fr_len(fp) >= sizeof(struct fc_frame_header) + len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) pp = fc_frame_header_get(fp) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * Get frame payload opcode (first byte) from message in fc_frame structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * This hides a cast and provides a place to add some checking. Return 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * if the frame has no payload.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static inline u8 fc_frame_payload_op(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) u8 *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) cp = fc_frame_payload_get(fp, sizeof(u8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (!cp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return *cp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * Get FC class from frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static inline enum fc_class fc_frame_class(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return fc_sof_class(fr_sof(fp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * Check the CRC in a frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * The CRC immediately follows the last data item *AFTER* the length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * The return value is zero if the CRC matches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) u32 fc_frame_crc_check(struct fc_frame *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static inline u8 fc_frame_rctl(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return fc_frame_header_get(fp)->fh_r_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static inline bool fc_frame_is_cmd(const struct fc_frame *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return fc_frame_rctl(fp) == FC_RCTL_DD_UNSOL_CMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * Check for leaks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * Print the frame header of any currently allocated frame, assuming there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * should be none at this point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) void fc_frame_leak_check(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #endif /* _FC_FRAME_H_ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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