diff options
Diffstat (limited to 'libdde_linux26/contrib/include/scsi/fc_frame.h')
| -rw-r--r-- | libdde_linux26/contrib/include/scsi/fc_frame.h | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/libdde_linux26/contrib/include/scsi/fc_frame.h b/libdde_linux26/contrib/include/scsi/fc_frame.h deleted file mode 100644 index 04d34a71..00000000 --- a/libdde_linux26/contrib/include/scsi/fc_frame.h +++ /dev/null @@ -1,242 +0,0 @@ -/* - * Copyright(c) 2007 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - * Maintained at www.Open-FCoE.org - */ - -#ifndef _FC_FRAME_H_ -#define _FC_FRAME_H_ - -#include <linux/scatterlist.h> -#include <linux/skbuff.h> -#include <scsi/scsi_cmnd.h> - -#include <scsi/fc/fc_fs.h> -#include <scsi/fc/fc_fcp.h> -#include <scsi/fc/fc_encaps.h> - -/* - * 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 */ - -/* - * Information about an individual fibre channel frame received or to be sent. - * The buffer may be in up to 4 additional non-contiguous sections, - * but the linear section must hold the frame header. - */ -#define FC_FRAME_SG_LEN 4 /* scatter/gather list maximum length */ - -#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_max_payload(fp) (fr_cb(fp)->fr_max_payload) -#define fr_cmd(fp) (fr_cb(fp)->fr_cmd) -#define fr_dir(fp) (fr_cmd(fp)->sc_data_direction) -#define fr_crc(fp) (fr_cb(fp)->fr_crc) - -struct fc_frame { - struct sk_buff skb; -}; - -struct fcoe_rcv_info { - struct packet_type *ptype; - struct fc_lport *fr_dev; /* transport layer private pointer */ - struct fc_seq *fr_seq; /* for use with exchange manager */ - struct scsi_cmnd *fr_cmd; /* for use of scsi command */ - u32 fr_crc; - u16 fr_max_payload; /* max FC payload */ - enum fc_sof fr_sof; /* start of frame delimiter */ - enum fc_eof fr_eof; /* end of frame delimiter */ - u8 fr_flags; /* flags - see below */ -}; - - -/* - * 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; -} - -struct fc_frame *fc_frame_alloc_fill(struct fc_lport *, size_t payload_len); - -struct fc_frame *__fc_frame_alloc(size_t payload_len); - -/* - * Get frame for sending via port. - */ -static inline struct fc_frame *_fc_frame_alloc(struct fc_lport *dev, - size_t payload_len) -{ - return __fc_frame_alloc(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 % 4) != 0) - fp = fc_frame_alloc_fill(dev, len); - else - fp = _fc_frame_alloc(dev, 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_frame structure. - * This hides a cast and provides a place to add some checking. - */ -static inline -struct fc_frame_header *fc_frame_header_get(const struct fc_frame *fp) -{ - WARN_ON(fr_len(fp) < sizeof(struct fc_frame_header)); - return (struct fc_frame_header *) fr_hdr(fp); -} - -/* - * Get frame payload from message in fc_frame structure. - * This hides a cast and provides a place to add some checking. - * The len parameter is the minimum length for the payload portion. - * Returns NULL if the frame is too short. - * - * This assumes the interesting part of the payload is in the first part - * of the buffer for received data. This may not be appropriate to use for - * buffers being transmitted. - */ -static inline void *fc_frame_payload_get(const struct fc_frame *fp, - size_t len) -{ - void *pp = NULL; - - if (fr_len(fp) >= sizeof(struct fc_frame_header) + len) - pp = fc_frame_header_get(fp) + 1; - return pp; -} - -/* - * Get frame payload opcode (first byte) from message in fc_frame structure. - * This hides a cast and provides a place to add some checking. Return 0 - * if the frame has no payload. - */ -static inline u8 fc_frame_payload_op(const struct fc_frame *fp) -{ - u8 *cp; - - cp = fc_frame_payload_get(fp, sizeof(u8)); - if (!cp) - return 0; - return *cp; - -} - -/* - * Get FC class from frame. - */ -static inline enum fc_class fc_frame_class(const struct fc_frame *fp) -{ - return fc_sof_class(fr_sof(fp)); -} - -/* - * Check the CRC in a frame. - * The CRC immediately follows the last data item *AFTER* the length. - * The return value is zero if the CRC matches. - */ -u32 fc_frame_crc_check(struct fc_frame *); - -static inline u8 fc_frame_rctl(const struct fc_frame *fp) -{ - return fc_frame_header_get(fp)->fh_r_ctl; -} - -static inline bool fc_frame_is_cmd(const struct fc_frame *fp) -{ - return fc_frame_rctl(fp) == FC_RCTL_DD_UNSOL_CMD; -} - -static inline bool fc_frame_is_read(const struct fc_frame *fp) -{ - if (fc_frame_is_cmd(fp) && fr_cmd(fp)) - return fr_dir(fp) == DMA_FROM_DEVICE; - return false; -} - -static inline bool fc_frame_is_write(const struct fc_frame *fp) -{ - if (fc_frame_is_cmd(fp) && fr_cmd(fp)) - return fr_dir(fp) == DMA_TO_DEVICE; - return false; -} - -/* - * Check for leaks. - * Print the frame header of any currently allocated frame, assuming there - * should be none at this point. - */ -void fc_frame_leak_check(void); - -#endif /* _FC_FRAME_H_ */ |