forked from Minki/linux
b277d2aa9a
When LLD supports direct data placement (ddp) for large receive of an scsi i/o coming into fc_fcp, we call into libfc_function_template's ddp_setup() to prepare for a ddp of large receive for this read I/O. When I/O is complete, we call the corresponding ddp_done() to get the length of data ddped as well as to let LLD do clean up. fc_fcp_ddp_setup()/fc_fcp_ddp_done() are added to setup and complete a ddped read I/O described by the given fc_fcp_pkt. They would call into corresponding ddp_setup/ddp_done implemented by the fcoe layer. Eventually, fcoe layer calls into LLD's ddp_setup/ddp_done provided through net_device Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/*
|
|
* Copyright(c) 2007 - 2008 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 _LIBFCOE_H
|
|
#define _LIBFCOE_H
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <scsi/fc/fc_fcoe.h>
|
|
#include <scsi/libfc.h>
|
|
|
|
/*
|
|
* this percpu struct for fcoe
|
|
*/
|
|
struct fcoe_percpu_s {
|
|
int cpu;
|
|
struct task_struct *thread;
|
|
struct sk_buff_head fcoe_rx_list;
|
|
struct page *crc_eof_page;
|
|
int crc_eof_offset;
|
|
};
|
|
|
|
/*
|
|
* the fcoe sw transport private data
|
|
*/
|
|
struct fcoe_softc {
|
|
struct list_head list;
|
|
struct fc_lport *lp;
|
|
struct net_device *real_dev;
|
|
struct net_device *phys_dev; /* device with ethtool_ops */
|
|
struct packet_type fcoe_packet_type;
|
|
struct sk_buff_head fcoe_pending_queue;
|
|
u8 fcoe_pending_queue_active;
|
|
|
|
u8 dest_addr[ETH_ALEN];
|
|
u8 ctl_src_addr[ETH_ALEN];
|
|
u8 data_src_addr[ETH_ALEN];
|
|
/*
|
|
* fcoe protocol address learning related stuff
|
|
*/
|
|
u16 flogi_oxid;
|
|
u8 flogi_progress;
|
|
u8 address_mode;
|
|
};
|
|
|
|
static inline struct net_device *fcoe_netdev(
|
|
const struct fc_lport *lp)
|
|
{
|
|
return ((struct fcoe_softc *)lport_priv(lp))->real_dev;
|
|
}
|
|
|
|
static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb)
|
|
{
|
|
return (struct fcoe_hdr *)skb_network_header(skb);
|
|
}
|
|
|
|
static inline int skb_fcoe_offset(const struct sk_buff *skb)
|
|
{
|
|
return skb_network_offset(skb);
|
|
}
|
|
|
|
static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb)
|
|
{
|
|
return (struct fc_frame_header *)skb_transport_header(skb);
|
|
}
|
|
|
|
static inline int skb_fc_offset(const struct sk_buff *skb)
|
|
{
|
|
return skb_transport_offset(skb);
|
|
}
|
|
|
|
static inline void skb_reset_fc_header(struct sk_buff *skb)
|
|
{
|
|
skb_reset_network_header(skb);
|
|
skb_set_transport_header(skb, skb_network_offset(skb) +
|
|
sizeof(struct fcoe_hdr));
|
|
}
|
|
|
|
static inline bool skb_fc_is_data(const struct sk_buff *skb)
|
|
{
|
|
return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA;
|
|
}
|
|
|
|
static inline bool skb_fc_is_cmd(const struct sk_buff *skb)
|
|
{
|
|
return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD;
|
|
}
|
|
|
|
static inline bool skb_fc_has_exthdr(const struct sk_buff *skb)
|
|
{
|
|
return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) ||
|
|
(skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) ||
|
|
(skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH);
|
|
}
|
|
|
|
static inline bool skb_fc_is_roff(const struct sk_buff *skb)
|
|
{
|
|
return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF;
|
|
}
|
|
|
|
static inline u16 skb_fc_oxid(const struct sk_buff *skb)
|
|
{
|
|
return be16_to_cpu(skb_fc_header(skb)->fh_ox_id);
|
|
}
|
|
|
|
static inline u16 skb_fc_rxid(const struct sk_buff *skb)
|
|
{
|
|
return be16_to_cpu(skb_fc_header(skb)->fh_rx_id);
|
|
}
|
|
|
|
/* libfcoe funcs */
|
|
int fcoe_reset(struct Scsi_Host *shost);
|
|
u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
|
|
unsigned int scheme, unsigned int port);
|
|
|
|
u32 fcoe_fc_crc(struct fc_frame *fp);
|
|
int fcoe_xmit(struct fc_lport *, struct fc_frame *);
|
|
int fcoe_rcv(struct sk_buff *, struct net_device *,
|
|
struct packet_type *, struct net_device *);
|
|
|
|
int fcoe_percpu_receive_thread(void *arg);
|
|
void fcoe_clean_pending_queue(struct fc_lport *lp);
|
|
void fcoe_percpu_clean(struct fc_lport *lp);
|
|
void fcoe_watchdog(ulong vp);
|
|
int fcoe_link_ok(struct fc_lport *lp);
|
|
|
|
struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
|
|
int fcoe_hostlist_add(const struct fc_lport *);
|
|
int fcoe_hostlist_remove(const struct fc_lport *);
|
|
|
|
struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int);
|
|
int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
|
|
|
|
/* fcoe sw hba */
|
|
int __init fcoe_sw_init(void);
|
|
int __exit fcoe_sw_exit(void);
|
|
#endif /* _LIBFCOE_H */
|