2008-12-09 16:10:17 -07:00
|
|
|
/*
|
|
|
|
* 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 _LIBFC_H_
|
|
|
|
#define _LIBFC_H_
|
|
|
|
|
|
|
|
#include <linux/timer.h>
|
|
|
|
#include <linux/if.h>
|
2009-03-31 16:51:50 -06:00
|
|
|
#include <linux/percpu.h>
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
#include <scsi/scsi_transport.h>
|
|
|
|
#include <scsi/scsi_transport_fc.h>
|
|
|
|
|
|
|
|
#include <scsi/fc/fc_fcp.h>
|
|
|
|
#include <scsi/fc/fc_ns.h>
|
|
|
|
#include <scsi/fc/fc_els.h>
|
|
|
|
#include <scsi/fc/fc_gs.h>
|
|
|
|
|
|
|
|
#include <scsi/fc_frame.h>
|
|
|
|
|
|
|
|
/*
|
|
|
|
* libfc error codes
|
|
|
|
*/
|
|
|
|
#define FC_NO_ERR 0 /* no error */
|
|
|
|
#define FC_EX_TIMEOUT 1 /* Exchange timeout */
|
|
|
|
#define FC_EX_CLOSED 2 /* Exchange closed */
|
|
|
|
|
|
|
|
/* some helpful macros */
|
|
|
|
|
|
|
|
#define ntohll(x) be64_to_cpu(x)
|
|
|
|
#define htonll(x) cpu_to_be64(x)
|
|
|
|
|
|
|
|
#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
|
|
|
|
|
|
|
|
#define hton24(p, v) do { \
|
|
|
|
p[0] = (((v) >> 16) & 0xFF); \
|
|
|
|
p[1] = (((v) >> 8) & 0xFF); \
|
|
|
|
p[2] = ((v) & 0xFF); \
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* FC HBA status
|
|
|
|
*/
|
|
|
|
enum fc_lport_state {
|
2009-07-29 18:04:22 -06:00
|
|
|
LPORT_ST_DISABLED = 0,
|
2008-12-09 16:10:17 -07:00
|
|
|
LPORT_ST_FLOGI,
|
|
|
|
LPORT_ST_DNS,
|
2009-11-03 12:46:51 -07:00
|
|
|
LPORT_ST_RNN_ID,
|
2009-11-03 12:46:56 -07:00
|
|
|
LPORT_ST_RSNN_NN,
|
2009-11-03 12:47:01 -07:00
|
|
|
LPORT_ST_RSPN_ID,
|
2008-12-09 16:10:17 -07:00
|
|
|
LPORT_ST_RFT_ID,
|
|
|
|
LPORT_ST_SCR,
|
|
|
|
LPORT_ST_READY,
|
|
|
|
LPORT_ST_LOGO,
|
|
|
|
LPORT_ST_RESET
|
|
|
|
};
|
|
|
|
|
|
|
|
enum fc_disc_event {
|
|
|
|
DISC_EV_NONE = 0,
|
|
|
|
DISC_EV_SUCCESS,
|
|
|
|
DISC_EV_FAILED
|
|
|
|
};
|
|
|
|
|
|
|
|
enum fc_rport_state {
|
|
|
|
RPORT_ST_INIT, /* initialized */
|
|
|
|
RPORT_ST_PLOGI, /* waiting for PLOGI completion */
|
|
|
|
RPORT_ST_PRLI, /* waiting for PRLI completion */
|
|
|
|
RPORT_ST_RTV, /* waiting for RTV completion */
|
|
|
|
RPORT_ST_READY, /* ready for use */
|
|
|
|
RPORT_ST_LOGO, /* port logout sent */
|
2009-08-25 15:03:47 -06:00
|
|
|
RPORT_ST_ADISC, /* Discover Address sent */
|
2009-07-29 18:04:43 -06:00
|
|
|
RPORT_ST_DELETE, /* port being deleted */
|
[SCSI] libfc: fix free of fc_rport_priv with timer pending
Timer crashes were caused by freeing a struct fc_rport_priv
with a timer pending, causing the timer facility list to be
corrupted. This was during FC uplink flap tests with a lot
of targets.
After discovery, we were doing an PLOGI on an rdata that was
in DELETE state but not yet removed from the lookup list.
This moved the rdata from DELETE state to PLOGI state.
If the PLOGI exchange allocation failed and needed to be
retried, the timer scheduling could race with the free
being done by fc_rport_work().
When fc_rport_login() is called on a rport in DELETE state,
move it to a new state RESTART. In fc_rport_work, when
handling a LOGO, STOPPED or FAILED event, look for restart
state. In the RESTART case, don't take the rdata off the
list and after the transport remote port is deleted and
exchanges are reset, re-login to the remote port.
Note that the new RESTART state also corrects a problem we
had when re-discovering a port that had moved to DELETE state.
In that case, a new rdata was created, but the old rdata
would do an exchange manager reset affecting the FC_ID
for both the new rdata and old rdata. With the new state,
the new port isn't logged into until after any old exchanges
are reset.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-10-21 17:28:30 -06:00
|
|
|
RPORT_ST_RESTART, /* remote port being deleted and will restart */
|
2008-12-09 16:10:17 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* struct fc_disc_port - temporary discovery port to hold rport identifiers
|
2009-08-25 15:02:59 -06:00
|
|
|
* @lp: Fibre Channel host port instance
|
|
|
|
* @peers: Node for list management during discovery and RSCN processing
|
|
|
|
* @rport_work: Work struct for starting the rport state machine
|
|
|
|
* @port_id: Port ID of the discovered port
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
struct fc_disc_port {
|
|
|
|
struct fc_lport *lp;
|
|
|
|
struct list_head peers;
|
|
|
|
struct work_struct rport_work;
|
2009-08-25 15:02:59 -06:00
|
|
|
u32 port_id;
|
2008-12-09 16:10:17 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
enum fc_rport_event {
|
|
|
|
RPORT_EV_NONE = 0,
|
2009-08-25 15:01:12 -06:00
|
|
|
RPORT_EV_READY,
|
2008-12-09 16:10:17 -07:00
|
|
|
RPORT_EV_FAILED,
|
|
|
|
RPORT_EV_STOP,
|
|
|
|
RPORT_EV_LOGO
|
|
|
|
};
|
|
|
|
|
2009-08-25 15:00:50 -06:00
|
|
|
struct fc_rport_priv;
|
|
|
|
|
2008-12-09 16:10:17 -07:00
|
|
|
struct fc_rport_operations {
|
2009-08-25 15:00:50 -06:00
|
|
|
void (*event_callback)(struct fc_lport *, struct fc_rport_priv *,
|
2008-12-09 16:10:17 -07:00
|
|
|
enum fc_rport_event);
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* struct fc_rport_libfc_priv - libfc internal information about a remote port
|
|
|
|
* @local_port: Fibre Channel host port instance
|
2009-08-25 15:01:18 -06:00
|
|
|
* @rp_state: indicates READY for I/O or DELETE when blocked.
|
|
|
|
* @flags: REC and RETRY supported flags
|
|
|
|
* @e_d_tov: error detect timeout value (in msec)
|
|
|
|
* @r_a_tov: resource allocation timeout value (in msec)
|
|
|
|
*/
|
|
|
|
struct fc_rport_libfc_priv {
|
|
|
|
struct fc_lport *local_port;
|
|
|
|
enum fc_rport_state rp_state;
|
|
|
|
u16 flags;
|
|
|
|
#define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
|
|
|
|
#define FC_RP_FLAGS_RETRY (1 << 1)
|
|
|
|
unsigned int e_d_tov;
|
|
|
|
unsigned int r_a_tov;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* struct fc_rport_priv - libfc rport and discovery info about a remote port
|
|
|
|
* @local_port: Fibre Channel host port instance
|
2009-08-25 15:01:01 -06:00
|
|
|
* @rport: transport remote port
|
|
|
|
* @kref: reference counter
|
2008-12-09 16:10:17 -07:00
|
|
|
* @rp_state: state tracks progress of PLOGI, PRLI, and RTV exchanges
|
2009-08-25 15:01:01 -06:00
|
|
|
* @ids: remote port identifiers and roles
|
2008-12-09 16:10:17 -07:00
|
|
|
* @flags: REC and RETRY supported flags
|
|
|
|
* @max_seq: maximum number of concurrent sequences
|
2009-08-25 15:02:11 -06:00
|
|
|
* @disc_id: discovery identifier
|
2009-08-25 15:01:01 -06:00
|
|
|
* @maxframe_size: maximum frame size
|
2008-12-09 16:10:17 -07:00
|
|
|
* @retries: retry count in current state
|
|
|
|
* @e_d_tov: error detect timeout value (in msec)
|
|
|
|
* @r_a_tov: resource allocation timeout value (in msec)
|
|
|
|
* @rp_mutex: mutex protects rport
|
|
|
|
* @retry_work:
|
|
|
|
* @event_callback: Callback for rport READY, FAILED or LOGO
|
|
|
|
*/
|
2009-08-25 15:01:18 -06:00
|
|
|
struct fc_rport_priv {
|
2008-12-09 16:10:17 -07:00
|
|
|
struct fc_lport *local_port;
|
2009-08-25 15:01:01 -06:00
|
|
|
struct fc_rport *rport;
|
|
|
|
struct kref kref;
|
2008-12-09 16:10:17 -07:00
|
|
|
enum fc_rport_state rp_state;
|
2009-08-25 15:01:01 -06:00
|
|
|
struct fc_rport_identifiers ids;
|
2008-12-09 16:10:17 -07:00
|
|
|
u16 flags;
|
|
|
|
u16 max_seq;
|
2009-08-25 15:02:11 -06:00
|
|
|
u16 disc_id;
|
2009-08-25 15:01:01 -06:00
|
|
|
u16 maxframe_size;
|
2008-12-09 16:10:17 -07:00
|
|
|
unsigned int retries;
|
|
|
|
unsigned int e_d_tov;
|
|
|
|
unsigned int r_a_tov;
|
|
|
|
struct mutex rp_mutex;
|
|
|
|
struct delayed_work retry_work;
|
|
|
|
enum fc_rport_event event;
|
|
|
|
struct fc_rport_operations *ops;
|
|
|
|
struct list_head peers;
|
|
|
|
struct work_struct event_work;
|
2009-08-25 15:01:01 -06:00
|
|
|
u32 supported_classes;
|
2008-12-09 16:10:17 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* fcoe stats structure
|
|
|
|
*/
|
|
|
|
struct fcoe_dev_stats {
|
|
|
|
u64 SecondsSinceLastReset;
|
|
|
|
u64 TxFrames;
|
|
|
|
u64 TxWords;
|
|
|
|
u64 RxFrames;
|
|
|
|
u64 RxWords;
|
|
|
|
u64 ErrorFrames;
|
|
|
|
u64 DumpedFrames;
|
|
|
|
u64 LinkFailureCount;
|
|
|
|
u64 LossOfSignalCount;
|
|
|
|
u64 InvalidTxWordCount;
|
|
|
|
u64 InvalidCRCCount;
|
|
|
|
u64 InputRequests;
|
|
|
|
u64 OutputRequests;
|
|
|
|
u64 ControlRequests;
|
|
|
|
u64 InputMegabytes;
|
|
|
|
u64 OutputMegabytes;
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* els data is used for passing ELS respone specific
|
|
|
|
* data to send ELS response mainly using infomation
|
|
|
|
* in exchange and sequence in EM layer.
|
|
|
|
*/
|
|
|
|
struct fc_seq_els_data {
|
|
|
|
struct fc_frame *fp;
|
|
|
|
enum fc_els_rjt_reason reason;
|
|
|
|
enum fc_els_rjt_explan explan;
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* FCP request structure, one for each scsi cmd request
|
|
|
|
*/
|
|
|
|
struct fc_fcp_pkt {
|
|
|
|
/*
|
|
|
|
* housekeeping stuff
|
|
|
|
*/
|
|
|
|
struct fc_lport *lp; /* handle to hba struct */
|
|
|
|
u16 state; /* scsi_pkt state state */
|
|
|
|
u16 tgt_flags; /* target flags */
|
|
|
|
atomic_t ref_cnt; /* fcp pkt ref count */
|
|
|
|
spinlock_t scsi_pkt_lock; /* Must be taken before the host lock
|
|
|
|
* if both are held at the same time */
|
|
|
|
/*
|
|
|
|
* SCSI I/O related stuff
|
|
|
|
*/
|
|
|
|
struct scsi_cmnd *cmd; /* scsi command pointer. set/clear
|
|
|
|
* under host lock */
|
|
|
|
struct list_head list; /* tracks queued commands. access under
|
|
|
|
* host lock */
|
|
|
|
/*
|
|
|
|
* timeout related stuff
|
|
|
|
*/
|
|
|
|
struct timer_list timer; /* command timer */
|
|
|
|
struct completion tm_done;
|
|
|
|
int wait_for_comp;
|
|
|
|
unsigned long start_time; /* start jiffie */
|
|
|
|
unsigned long end_time; /* end jiffie */
|
|
|
|
unsigned long last_pkt_time; /* jiffies of last frame received */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* scsi cmd and data transfer information
|
|
|
|
*/
|
|
|
|
u32 data_len;
|
|
|
|
/*
|
|
|
|
* transport related veriables
|
|
|
|
*/
|
|
|
|
struct fcp_cmnd cdb_cmd;
|
|
|
|
size_t xfer_len;
|
2009-02-27 15:07:21 -07:00
|
|
|
u16 xfer_ddp; /* this xfer is ddped */
|
2008-12-09 16:10:17 -07:00
|
|
|
u32 xfer_contig_end; /* offset of end of contiguous xfer */
|
|
|
|
u16 max_payload; /* max payload size in bytes */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* scsi/fcp return status
|
|
|
|
*/
|
|
|
|
u32 io_status; /* SCSI result upper 24 bits */
|
|
|
|
u8 cdb_status;
|
|
|
|
u8 status_code; /* FCP I/O status */
|
|
|
|
/* bit 3 Underrun bit 2: overrun */
|
|
|
|
u8 scsi_comp_flags;
|
|
|
|
u32 req_flags; /* bit 0: read bit:1 write */
|
|
|
|
u32 scsi_resid; /* residule length */
|
|
|
|
|
|
|
|
struct fc_rport *rport; /* remote port pointer */
|
|
|
|
struct fc_seq *seq_ptr; /* current sequence pointer */
|
|
|
|
/*
|
|
|
|
* Error Processing
|
|
|
|
*/
|
|
|
|
u8 recov_retry; /* count of recovery retries */
|
|
|
|
struct fc_seq *recov_seq; /* sequence for REC or SRR */
|
|
|
|
};
|
2009-02-27 15:07:21 -07:00
|
|
|
/*
|
|
|
|
* FC_FCP HELPER FUNCTIONS
|
|
|
|
*****************************/
|
|
|
|
static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
|
|
|
|
{
|
|
|
|
if (fsp && fsp->cmd)
|
|
|
|
return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
|
|
|
|
return false;
|
|
|
|
}
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Structure and function definitions for managing Fibre Channel Exchanges
|
|
|
|
* and Sequences
|
|
|
|
*
|
|
|
|
* fc_exch holds state for one exchange and links to its active sequence.
|
|
|
|
*
|
|
|
|
* fc_seq holds the state for an individual sequence.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct fc_exch_mgr;
|
2009-07-29 18:05:00 -06:00
|
|
|
struct fc_exch_mgr_anchor;
|
[SCSI] fcoe, libfc: adds per cpu exch pool within exchange manager(EM)
Adds per cpu exch pool for these reasons:-
1. Currently an EM instance is shared across all cpus to manage
all exches for all cpus. This required em_lock across all
cpus for an exch alloc, free, lookup and reset each frame
and that made em_lock expensive, so instead having per cpu
exch pool with their own per cpu pool lock will likely reduce
locking contention in fast path for an exch alloc, free and
lookup.
2. Per cpu exch pool will likely improve cache hit ratio since
all frames of an exch will be processed on the same cpu on
which exch originated.
This patch is only prep work to help in keeping complexity of next
patch low, so this patch only sets up per cpu exch pool and related
helper funcs to be used by next patch. The next patch fully makes
use of per cpu exch pool in all code paths ie. tx, rx and reset.
Divides per EM exch id range equally across all cpus to setup per
cpu exch pool. This division is such that lower bits of exch id
carries cpu number info on which exch originated, later a simple
bitwise AND operation on exch id of incoming frame with fc_cpu_mask
retrieves cpu number info to direct all frames to same cpu on which
exch originated. This required a global fc_cpu_mask and fc_cpu_order
initialized to max possible cpus number nr_cpu_ids rounded up to 2's
power, this will be used in mapping exch id and exch ptr array
index in pool during exch allocation, find or reset code paths.
Adds a check in fc_exch_mgr_alloc() to ensure specified min_xid
lower bits are zero since these bits are used to carry cpu info.
Adds and initializes struct fc_exch_pool with all required fields
to manage exches in pool.
Allocates per cpu struct fc_exch_pool with memory for exches array
for range of exches per pool. The exches array memory is followed
by struct fc_exch_pool.
Adds fc_exch_ptr_get/set() helper functions to get/set exch ptr in
pool exches array at specified array index.
Increases default FCOE_MAX_XID to 0x0FFF from 0x07EF, so that more
exches are available per cpu after above described exch id range
division across all cpus to each pool.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-08-25 14:58:47 -06:00
|
|
|
extern u16 fc_cpu_mask; /* cpu mask for possible cpus */
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Sequence.
|
|
|
|
*/
|
|
|
|
struct fc_seq {
|
|
|
|
u8 id; /* seq ID */
|
|
|
|
u16 ssb_stat; /* status flags for sequence status block */
|
|
|
|
u16 cnt; /* frames sent so far on sequence */
|
|
|
|
u32 rec_data; /* FC-4 value for REC */
|
|
|
|
};
|
|
|
|
|
|
|
|
#define FC_EX_DONE (1 << 0) /* ep is completed */
|
|
|
|
#define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Exchange.
|
|
|
|
*
|
|
|
|
* Locking notes: The ex_lock protects following items:
|
|
|
|
* state, esb_stat, f_ctl, seq.ssb_stat
|
|
|
|
* seq_id
|
|
|
|
* sequence allocation
|
|
|
|
*/
|
|
|
|
struct fc_exch {
|
|
|
|
struct fc_exch_mgr *em; /* exchange manager */
|
[SCSI] fcoe, libfc: fully makes use of per cpu exch pool and then removes em_lock
1. Updates fcoe_rcv() to queue incoming frames to the fcoe per
cpu thread on which this frame's exch was originated and simply
use current cpu for request exch not originated by initiator.
It is redundant to add this code under CONFIG_SMP, so removes
CONFIG_SMP uses around this code.
2. Updates fc_exch_em_alloc, fc_exch_delete, fc_exch_find to use
per cpu exch pools, here fc_exch_delete is rename of older
fc_exch_mgr_delete_ep since ep/exch are now deleted in pools
of EM and so brief new name is sufficient and better name.
Updates these functions to map exch id to their index into exch
pool using fc_cpu_mask, fc_cpu_order and EM min_xid.
This mapping is as per detailed explanation about this in
last patch and basically this is just as lower fc_cpu_mask
bits of exch id as cpu number and upper bit sum of EM min_xid
and exch index in pool.
Uses pool next_index to keep track of exch allocation from
pool along with pool_max_index as upper bound of exches array
in pool.
3. Adds exch pool ptr to fc_exch to free exch to its pool in
fc_exch_delete.
4. Updates fc_exch_mgr_reset to reset all exch pools of an EM,
this required adding fc_exch_pool_reset func to reset exches
in pool and then have fc_exch_mgr_reset call fc_exch_pool_reset
for each pool within each EM for a lport.
5. Removes no longer needed exches array, em_lock, next_xid, and
total_exches from struct fc_exch_mgr, these are not needed after
use of per cpu exch pool, also removes not used max_read,
last_read from struct fc_exch_mgr.
6. Updates locking notes for exch pool lock with fc_exch lock and
uses pool lock in exch allocation, lookup and reset.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-08-25 14:58:53 -06:00
|
|
|
struct fc_exch_pool *pool; /* per cpu exches pool */
|
2008-12-09 16:10:17 -07:00
|
|
|
u32 state; /* internal driver state */
|
|
|
|
u16 xid; /* our exchange ID */
|
|
|
|
struct list_head ex_list; /* free or busy list linkage */
|
|
|
|
spinlock_t ex_lock; /* lock covering exchange state */
|
|
|
|
atomic_t ex_refcnt; /* reference counter */
|
|
|
|
struct delayed_work timeout_work; /* timer for upper level protocols */
|
|
|
|
struct fc_lport *lp; /* fc device instance */
|
|
|
|
u16 oxid; /* originator's exchange ID */
|
|
|
|
u16 rxid; /* responder's exchange ID */
|
|
|
|
u32 oid; /* originator's FCID */
|
|
|
|
u32 sid; /* source FCID */
|
|
|
|
u32 did; /* destination FCID */
|
|
|
|
u32 esb_stat; /* exchange status for ESB */
|
|
|
|
u32 r_a_tov; /* r_a_tov from rport (msec) */
|
|
|
|
u8 seq_id; /* next sequence ID to use */
|
|
|
|
u32 f_ctl; /* F_CTL flags for sequences */
|
|
|
|
u8 fh_type; /* frame type */
|
|
|
|
enum fc_class class; /* class of service */
|
|
|
|
struct fc_seq seq; /* single sequence */
|
|
|
|
/*
|
|
|
|
* Handler for responses to this current exchange.
|
|
|
|
*/
|
|
|
|
void (*resp)(struct fc_seq *, struct fc_frame *, void *);
|
|
|
|
void (*destructor)(struct fc_seq *, void *);
|
|
|
|
/*
|
|
|
|
* arg is passed as void pointer to exchange
|
|
|
|
* resp and destructor handlers
|
|
|
|
*/
|
|
|
|
void *arg;
|
|
|
|
};
|
|
|
|
#define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
|
|
|
|
|
|
|
|
struct libfc_function_template {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Interface to send a FC frame
|
|
|
|
*
|
2009-02-27 11:55:39 -07:00
|
|
|
* STATUS: REQUIRED
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-02-27 11:55:39 -07:00
|
|
|
int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
2009-02-27 11:55:39 -07:00
|
|
|
* Interface to send ELS/CT frames
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
struct fc_seq *(*elsct_send)(struct fc_lport *lport,
|
2009-08-25 15:00:55 -06:00
|
|
|
u32 did,
|
2008-12-09 16:10:17 -07:00
|
|
|
struct fc_frame *fp,
|
|
|
|
unsigned int op,
|
|
|
|
void (*resp)(struct fc_seq *,
|
|
|
|
struct fc_frame *fp,
|
|
|
|
void *arg),
|
|
|
|
void *arg, u32 timer_msec);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Send the FC frame payload using a new exchange and sequence.
|
|
|
|
*
|
|
|
|
* The frame pointer with some of the header's fields must be
|
|
|
|
* filled before calling exch_seq_send(), those fields are,
|
|
|
|
*
|
|
|
|
* - routing control
|
|
|
|
* - FC port did
|
|
|
|
* - FC port sid
|
|
|
|
* - FC header type
|
|
|
|
* - frame control
|
|
|
|
* - parameter or relative offset
|
|
|
|
*
|
|
|
|
* The exchange response handler is set in this routine to resp()
|
|
|
|
* function pointer. It can be called in two scenarios: if a timeout
|
|
|
|
* occurs or if a response frame is received for the exchange. The
|
|
|
|
* fc_frame pointer in response handler will also indicate timeout
|
|
|
|
* as error using IS_ERR related macros.
|
|
|
|
*
|
|
|
|
* The exchange destructor handler is also set in this routine.
|
|
|
|
* The destructor handler is invoked by EM layer when exchange
|
|
|
|
* is about to free, this can be used by caller to free its
|
|
|
|
* resources along with exchange free.
|
|
|
|
*
|
|
|
|
* The arg is passed back to resp and destructor handler.
|
|
|
|
*
|
|
|
|
* The timeout value (in msec) for an exchange is set if non zero
|
|
|
|
* timer_msec argument is specified. The timer is canceled when
|
|
|
|
* it fires or when the exchange is done. The exchange timeout handler
|
|
|
|
* is registered by EM layer.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
struct fc_seq *(*exch_seq_send)(struct fc_lport *lp,
|
|
|
|
struct fc_frame *fp,
|
|
|
|
void (*resp)(struct fc_seq *sp,
|
|
|
|
struct fc_frame *fp,
|
|
|
|
void *arg),
|
|
|
|
void (*destructor)(struct fc_seq *sp,
|
|
|
|
void *arg),
|
|
|
|
void *arg, unsigned int timer_msec);
|
|
|
|
|
2009-02-27 15:07:21 -07:00
|
|
|
/*
|
|
|
|
* Sets up the DDP context for a given exchange id on the given
|
|
|
|
* scatterlist if LLD supports DDP for large receive.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
|
|
|
*/
|
|
|
|
int (*ddp_setup)(struct fc_lport *lp, u16 xid,
|
|
|
|
struct scatterlist *sgl, unsigned int sgc);
|
|
|
|
/*
|
|
|
|
* Completes the DDP transfer and returns the length of data DDPed
|
|
|
|
* for the given exchange id.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
|
|
|
*/
|
|
|
|
int (*ddp_done)(struct fc_lport *lp, u16 xid);
|
2008-12-09 16:10:17 -07:00
|
|
|
/*
|
2009-02-27 11:55:39 -07:00
|
|
|
* Send a frame using an existing sequence and exchange.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp,
|
|
|
|
struct fc_frame *fp);
|
|
|
|
|
|
|
|
/*
|
2009-02-27 11:55:39 -07:00
|
|
|
* Send an ELS response using infomation from a previous
|
|
|
|
* exchange and sequence.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd,
|
|
|
|
struct fc_seq_els_data *els_data);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Abort an exchange and sequence. Generally called because of a
|
|
|
|
* exchange timeout or an abort from the upper layer.
|
|
|
|
*
|
|
|
|
* A timer_msec can be specified for abort timeout, if non-zero
|
|
|
|
* timer_msec value is specified then exchange resp handler
|
|
|
|
* will be called with timeout error if no response to abort.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
int (*seq_exch_abort)(const struct fc_seq *req_sp,
|
|
|
|
unsigned int timer_msec);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Indicate that an exchange/sequence tuple is complete and the memory
|
|
|
|
* allocated for the related objects may be freed.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*exch_done)(struct fc_seq *sp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start a new sequence on the same exchange/sequence tuple.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
struct fc_seq *(*seq_start_next)(struct fc_seq *sp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset an exchange manager, completing all sequences and exchanges.
|
|
|
|
* If s_id is non-zero, reset only exchanges originating from that FID.
|
|
|
|
* If d_id is non-zero, reset only exchanges sending to that FID.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-02-27 11:54:35 -07:00
|
|
|
void (*exch_mgr_reset)(struct fc_lport *,
|
2008-12-09 16:10:17 -07:00
|
|
|
u32 s_id, u32 d_id);
|
|
|
|
|
2009-02-27 11:55:39 -07:00
|
|
|
/*
|
|
|
|
* Flush the rport work queue. Generally used before shutdown.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-02-27 11:55:39 -07:00
|
|
|
void (*rport_flush_queue)(void);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
2009-02-27 11:55:39 -07:00
|
|
|
* Receive a frame for a local port.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp,
|
|
|
|
struct fc_frame *fp);
|
|
|
|
|
2009-02-27 11:55:39 -07:00
|
|
|
/*
|
|
|
|
* Reset the local port.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-02-27 11:55:39 -07:00
|
|
|
int (*lport_reset)(struct fc_lport *);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
2009-02-27 11:55:18 -07:00
|
|
|
/*
|
2009-08-25 15:02:59 -06:00
|
|
|
* Create a remote port with a given port ID
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2009-02-27 11:55:18 -07:00
|
|
|
*/
|
2009-08-25 15:02:59 -06:00
|
|
|
struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32);
|
2009-02-27 11:55:18 -07:00
|
|
|
|
2008-12-09 16:10:17 -07:00
|
|
|
/*
|
|
|
|
* Initiates the RP state machine. It is called from the LP module.
|
|
|
|
* This function will issue the following commands to the N_Port
|
|
|
|
* identified by the FC ID provided.
|
|
|
|
*
|
|
|
|
* - PLOGI
|
|
|
|
* - PRLI
|
|
|
|
* - RTV
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-08-25 15:00:50 -06:00
|
|
|
int (*rport_login)(struct fc_rport_priv *);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Logoff, and remove the rport from the transport if
|
|
|
|
* it had been added. This will send a LOGO to the target.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-08-25 15:00:50 -06:00
|
|
|
int (*rport_logoff)(struct fc_rport_priv *);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Recieve a request from a remote port.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
|
2009-08-25 15:03:10 -06:00
|
|
|
struct fc_lport *);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
2009-02-27 11:55:39 -07:00
|
|
|
/*
|
|
|
|
* lookup an rport by it's port ID.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-08-25 15:00:50 -06:00
|
|
|
struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
2009-08-25 15:01:01 -06:00
|
|
|
/*
|
|
|
|
* Destroy an rport after final kref_put().
|
|
|
|
* The argument is a pointer to the kref inside the fc_rport_priv.
|
|
|
|
*/
|
|
|
|
void (*rport_destroy)(struct kref *);
|
|
|
|
|
2008-12-09 16:10:17 -07:00
|
|
|
/*
|
|
|
|
* Send a fcp cmd from fsp pkt.
|
|
|
|
* Called with the SCSI host lock unlocked and irqs disabled.
|
|
|
|
*
|
|
|
|
* The resp handler is called when FCP_RSP received.
|
|
|
|
*
|
2009-02-27 11:55:39 -07:00
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
|
|
|
|
void (*resp)(struct fc_seq *, struct fc_frame *fp,
|
|
|
|
void *arg));
|
|
|
|
|
|
|
|
/*
|
2009-02-27 11:55:39 -07:00
|
|
|
* Cleanup the FCP layer, used durring link down and reset
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*fcp_cleanup)(struct fc_lport *lp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Abort all I/O on a local port
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*fcp_abort_io)(struct fc_lport *lp);
|
|
|
|
|
2009-02-27 11:55:39 -07:00
|
|
|
/*
|
|
|
|
* Receive a request for the discovery layer.
|
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*disc_recv_req)(struct fc_seq *,
|
|
|
|
struct fc_frame *, struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start discovery for a local port.
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*disc_start)(void (*disc_callback)(struct fc_lport *,
|
|
|
|
enum fc_disc_event),
|
|
|
|
struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Stop discovery for a given lport. This will remove
|
|
|
|
* all discovered rports
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*disc_stop) (struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Stop discovery for a given lport. This will block
|
|
|
|
* until all discovered rports are deleted from the
|
|
|
|
* FC transport class
|
2009-02-27 11:55:39 -07:00
|
|
|
*
|
|
|
|
* STATUS: OPTIONAL
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
void (*disc_stop_final) (struct fc_lport *);
|
|
|
|
};
|
|
|
|
|
|
|
|
/* information used by the discovery layer */
|
|
|
|
struct fc_disc {
|
|
|
|
unsigned char retry_count;
|
|
|
|
unsigned char pending;
|
|
|
|
unsigned char requested;
|
|
|
|
unsigned short seq_count;
|
|
|
|
unsigned char buf_len;
|
2009-08-25 15:02:11 -06:00
|
|
|
u16 disc_id;
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
void (*disc_callback)(struct fc_lport *,
|
|
|
|
enum fc_disc_event);
|
|
|
|
|
|
|
|
struct list_head rports;
|
|
|
|
struct fc_lport *lport;
|
|
|
|
struct mutex disc_mutex;
|
|
|
|
struct fc_gpn_ft_resp partial_buf; /* partial name buffer */
|
|
|
|
struct delayed_work disc_work;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct fc_lport {
|
|
|
|
struct list_head list;
|
|
|
|
|
|
|
|
/* Associations */
|
|
|
|
struct Scsi_Host *host;
|
2009-07-29 18:05:00 -06:00
|
|
|
struct list_head ema_list;
|
2009-11-03 12:46:14 -07:00
|
|
|
struct list_head vports; /* child vports if N_Port */
|
|
|
|
struct fc_vport *vport; /* parent vport if VN_Port */
|
2009-08-25 15:00:50 -06:00
|
|
|
struct fc_rport_priv *dns_rp;
|
|
|
|
struct fc_rport_priv *ptp_rp;
|
2008-12-09 16:10:17 -07:00
|
|
|
void *scsi_priv;
|
|
|
|
struct fc_disc disc;
|
|
|
|
|
|
|
|
/* Operational Information */
|
|
|
|
struct libfc_function_template tt;
|
2009-02-27 11:54:57 -07:00
|
|
|
u8 link_up;
|
|
|
|
u8 qfull;
|
2008-12-09 16:10:17 -07:00
|
|
|
enum fc_lport_state state;
|
|
|
|
unsigned long boot_time;
|
|
|
|
|
|
|
|
struct fc_host_statistics host_stats;
|
2009-03-31 16:51:50 -06:00
|
|
|
struct fcoe_dev_stats *dev_stats;
|
|
|
|
|
2008-12-09 16:10:17 -07:00
|
|
|
u64 wwpn;
|
|
|
|
u64 wwnn;
|
|
|
|
u8 retry_count;
|
|
|
|
|
|
|
|
/* Capabilities */
|
|
|
|
u32 sg_supp:1; /* scatter gather supported */
|
|
|
|
u32 seq_offload:1; /* seq offload supported */
|
|
|
|
u32 crc_offload:1; /* crc offload supported */
|
|
|
|
u32 lro_enabled:1; /* large receive offload */
|
2009-11-03 12:46:14 -07:00
|
|
|
u32 does_npiv:1; /* supports multiple vports */
|
|
|
|
u32 npiv_enabled:1; /* switch/fabric allows NPIV */
|
2008-12-09 16:10:17 -07:00
|
|
|
u32 mfs; /* max FC payload size */
|
|
|
|
unsigned int service_params;
|
|
|
|
unsigned int e_d_tov;
|
|
|
|
unsigned int r_a_tov;
|
|
|
|
u8 max_retry_count;
|
2009-05-01 11:01:26 -06:00
|
|
|
u8 max_rport_retry_count;
|
2008-12-09 16:10:17 -07:00
|
|
|
u16 link_speed;
|
|
|
|
u16 link_supported_speeds;
|
|
|
|
u16 lro_xid; /* max xid for fcoe lro */
|
2009-02-27 15:07:04 -07:00
|
|
|
unsigned int lso_max; /* max large send size */
|
2008-12-09 16:10:17 -07:00
|
|
|
struct fc_ns_fts fcts; /* FC-4 type masks */
|
|
|
|
struct fc_els_rnid_gen rnid_gen; /* RNID information */
|
|
|
|
|
|
|
|
/* Semaphores */
|
|
|
|
struct mutex lp_mutex;
|
|
|
|
|
|
|
|
/* Miscellaneous */
|
|
|
|
struct delayed_work retry_work;
|
|
|
|
};
|
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* FC_LPORT HELPER FUNCTIONS
|
|
|
|
*****************************/
|
|
|
|
static inline int fc_lport_test_ready(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
return lp->state == LPORT_ST_READY;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void fc_set_wwnn(struct fc_lport *lp, u64 wwnn)
|
|
|
|
{
|
|
|
|
lp->wwnn = wwnn;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void fc_set_wwpn(struct fc_lport *lp, u64 wwnn)
|
|
|
|
{
|
|
|
|
lp->wwpn = wwnn;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void fc_lport_state_enter(struct fc_lport *lp,
|
|
|
|
enum fc_lport_state state)
|
|
|
|
{
|
|
|
|
if (state != lp->state)
|
|
|
|
lp->retry_count = 0;
|
|
|
|
lp->state = state;
|
|
|
|
}
|
|
|
|
|
2009-03-31 16:51:50 -06:00
|
|
|
static inline int fc_lport_init_stats(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
/* allocate per cpu stats block */
|
|
|
|
lp->dev_stats = alloc_percpu(struct fcoe_dev_stats);
|
|
|
|
if (!lp->dev_stats)
|
|
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void fc_lport_free_stats(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
free_percpu(lp->dev_stats);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
return per_cpu_ptr(lp->dev_stats, smp_processor_id());
|
|
|
|
}
|
|
|
|
|
2009-03-17 12:42:29 -06:00
|
|
|
static inline void *lport_priv(const struct fc_lport *lp)
|
|
|
|
{
|
|
|
|
return (void *)(lp + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport
|
|
|
|
* @sht: ptr to the scsi host templ
|
|
|
|
* @priv_size: size of private data after fc_lport
|
|
|
|
*
|
2009-11-03 12:46:08 -07:00
|
|
|
* Returns: libfc lport
|
2009-03-17 12:42:29 -06:00
|
|
|
*/
|
2009-11-03 12:46:08 -07:00
|
|
|
static inline struct fc_lport *
|
2009-03-17 12:42:29 -06:00
|
|
|
libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
|
|
|
|
{
|
2009-11-03 12:46:08 -07:00
|
|
|
struct fc_lport *lport;
|
|
|
|
struct Scsi_Host *shost;
|
|
|
|
|
|
|
|
shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size);
|
|
|
|
if (!shost)
|
|
|
|
return NULL;
|
|
|
|
lport = shost_priv(shost);
|
|
|
|
lport->host = shost;
|
|
|
|
INIT_LIST_HEAD(&lport->ema_list);
|
2009-11-03 12:46:14 -07:00
|
|
|
INIT_LIST_HEAD(&lport->vports);
|
2009-11-03 12:46:08 -07:00
|
|
|
return lport;
|
2009-03-17 12:42:29 -06:00
|
|
|
}
|
2008-12-09 16:10:17 -07:00
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* LOCAL PORT LAYER
|
|
|
|
*****************************/
|
|
|
|
int fc_lport_init(struct fc_lport *lp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Destroy the specified local port by finding and freeing all
|
|
|
|
* fc_rports associated with it and then by freeing the fc_lport
|
|
|
|
* itself.
|
|
|
|
*/
|
|
|
|
int fc_lport_destroy(struct fc_lport *lp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Logout the specified local port from the fabric
|
|
|
|
*/
|
|
|
|
int fc_fabric_logoff(struct fc_lport *lp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initiate the LP state machine. This handler will use fc_host_attr
|
|
|
|
* to store the FLOGI service parameters, so fc_host_attr must be
|
|
|
|
* initialized before calling this handler.
|
|
|
|
*/
|
|
|
|
int fc_fabric_login(struct fc_lport *lp);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The link is up for the given local port.
|
|
|
|
*/
|
2009-11-03 12:46:19 -07:00
|
|
|
void __fc_linkup(struct fc_lport *);
|
2008-12-09 16:10:17 -07:00
|
|
|
void fc_linkup(struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Link is down for the given local port.
|
|
|
|
*/
|
2009-11-03 12:46:19 -07:00
|
|
|
void __fc_linkdown(struct fc_lport *);
|
2008-12-09 16:10:17 -07:00
|
|
|
void fc_linkdown(struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Configure the local port.
|
|
|
|
*/
|
|
|
|
int fc_lport_config(struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset the local port.
|
|
|
|
*/
|
|
|
|
int fc_lport_reset(struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Set the mfs or reset
|
|
|
|
*/
|
|
|
|
int fc_set_mfs(struct fc_lport *lp, u32 mfs);
|
|
|
|
|
2009-11-03 12:46:14 -07:00
|
|
|
/*
|
|
|
|
* Allocate a new lport struct for an NPIV VN_Port
|
|
|
|
*/
|
|
|
|
struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Find an NPIV VN_Port by port ID
|
|
|
|
*/
|
|
|
|
struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
2009-11-03 12:46:19 -07:00
|
|
|
/*
|
|
|
|
* NPIV VN_Port link state management
|
|
|
|
*/
|
|
|
|
void fc_vport_setlink(struct fc_lport *vn_port);
|
|
|
|
void fc_vports_linkchange(struct fc_lport *n_port);
|
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* REMOTE PORT LAYER
|
|
|
|
*****************************/
|
|
|
|
int fc_rport_init(struct fc_lport *lp);
|
|
|
|
void fc_rport_terminate_io(struct fc_rport *rp);
|
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* DISCOVERY LAYER
|
|
|
|
*****************************/
|
|
|
|
int fc_disc_init(struct fc_lport *lp);
|
|
|
|
|
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* SCSI LAYER
|
|
|
|
*****************************/
|
|
|
|
/*
|
|
|
|
* Initialize the SCSI block of libfc
|
|
|
|
*/
|
|
|
|
int fc_fcp_init(struct fc_lport *);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This section provides an API which allows direct interaction
|
|
|
|
* with the SCSI-ml. Each of these functions satisfies a function
|
|
|
|
* pointer defined in Scsi_Host and therefore is always called
|
|
|
|
* directly from the SCSI-ml.
|
|
|
|
*/
|
|
|
|
int fc_queuecommand(struct scsi_cmnd *sc_cmd,
|
|
|
|
void (*done)(struct scsi_cmnd *));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Send an ABTS frame to the target device. The sc_cmd argument
|
|
|
|
* is a pointer to the SCSI command to be aborted.
|
|
|
|
*/
|
|
|
|
int fc_eh_abort(struct scsi_cmnd *sc_cmd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset a LUN by sending send the tm cmd to the target.
|
|
|
|
*/
|
|
|
|
int fc_eh_device_reset(struct scsi_cmnd *sc_cmd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset the host adapter.
|
|
|
|
*/
|
|
|
|
int fc_eh_host_reset(struct scsi_cmnd *sc_cmd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check rport status.
|
|
|
|
*/
|
|
|
|
int fc_slave_alloc(struct scsi_device *sdev);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Adjust the queue depth.
|
|
|
|
*/
|
2009-10-15 18:46:39 -06:00
|
|
|
int fc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Change the tag type.
|
|
|
|
*/
|
|
|
|
int fc_change_queue_type(struct scsi_device *sdev, int tag_type);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Free memory pools used by the FCP layer.
|
|
|
|
*/
|
|
|
|
void fc_fcp_destroy(struct fc_lport *);
|
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* ELS/CT interface
|
|
|
|
*****************************/
|
|
|
|
/*
|
|
|
|
* Initializes ELS/CT interface
|
|
|
|
*/
|
|
|
|
int fc_elsct_init(struct fc_lport *lp);
|
2009-11-03 12:46:29 -07:00
|
|
|
struct fc_seq *fc_elsct_send(struct fc_lport *lport,
|
|
|
|
u32 did,
|
|
|
|
struct fc_frame *fp,
|
|
|
|
unsigned int op,
|
|
|
|
void (*resp)(struct fc_seq *,
|
|
|
|
struct fc_frame *fp,
|
|
|
|
void *arg),
|
|
|
|
void *arg, u32 timer_msec);
|
|
|
|
void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *);
|
|
|
|
void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
|
2009-02-27 11:55:45 -07:00
|
|
|
/*
|
2008-12-09 16:10:17 -07:00
|
|
|
* EXCHANGE MANAGER LAYER
|
|
|
|
*****************************/
|
|
|
|
/*
|
|
|
|
* Initializes Exchange Manager related
|
|
|
|
* function pointers in struct libfc_function_template.
|
|
|
|
*/
|
|
|
|
int fc_exch_init(struct fc_lport *lp);
|
|
|
|
|
2009-07-29 18:05:00 -06:00
|
|
|
/*
|
|
|
|
* Adds Exchange Manager (EM) mp to lport.
|
|
|
|
*
|
|
|
|
* Adds specified mp to lport using struct fc_exch_mgr_anchor,
|
|
|
|
* the struct fc_exch_mgr_anchor allows same EM sharing by
|
|
|
|
* more than one lport with their specified match function,
|
|
|
|
* the match function is used in allocating exchange from
|
|
|
|
* added mp.
|
|
|
|
*/
|
|
|
|
struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
|
|
|
|
struct fc_exch_mgr *mp,
|
|
|
|
bool (*match)(struct fc_frame *));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Deletes Exchange Manager (EM) from lport by removing
|
|
|
|
* its anchor ema from lport.
|
|
|
|
*
|
|
|
|
* If removed anchor ema was the last user of its associated EM
|
|
|
|
* then also destroys associated EM.
|
|
|
|
*/
|
|
|
|
void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema);
|
|
|
|
|
2009-11-03 12:46:14 -07:00
|
|
|
/*
|
|
|
|
* Clone an exchange manager list, getting reference holds for each EM.
|
|
|
|
* This is for use with NPIV and sharing the X_ID space between VN_Ports.
|
|
|
|
*/
|
|
|
|
int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
|
|
|
|
|
2008-12-09 16:10:17 -07:00
|
|
|
/*
|
|
|
|
* Allocates an Exchange Manager (EM).
|
|
|
|
*
|
|
|
|
* The EM manages exchanges for their allocation and
|
|
|
|
* free, also allows exchange lookup for received
|
|
|
|
* frame.
|
|
|
|
*
|
|
|
|
* The class is used for initializing FC class of
|
|
|
|
* allocated exchange from EM.
|
|
|
|
*
|
|
|
|
* The min_xid and max_xid will limit new
|
|
|
|
* exchange ID (XID) within this range for
|
|
|
|
* a new exchange.
|
|
|
|
* The LLD may choose to have multiple EMs,
|
|
|
|
* e.g. one EM instance per CPU receive thread in LLD.
|
|
|
|
*
|
[SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor list
Modifies current code to use EM anchor list in EM allocation, EM free,
EM reset, exch allocation and exch lookup code paths.
1. Modifies fc_exch_mgr_alloc to accept EM match function and then
have allocated EM added to the lport using fc_exch_mgr_add API
while also updating EM kref for newly added EM.
2. Updates fc_exch_mgr_free API to accept only lport pointer instead
EM and then have this API free all EMs of the lport from EM anchor
list.
3. Removes single lport pointer link from the EM, which was used in
associating lport pointer in newly allocated exchange. Instead have
lport pointer passed along new exchange allocation call path and
then store passed lport pointer in newly allocated exchange, this
will allow a single EM instance to be used across more than one
lport and used in EM reset to reset only lport specific exchanges.
4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list
of the lport, adds additional exch lport pointer (ep->lp) check for
shared EM case to reset exchange specific to a lport requested reset.
5. Updates exch allocation API fc_exch_alloc to use EM anchor list and
its anchor match func pointer. The fc_exch_alloc will walk the list
of EMs until it finds a match, a match will be either null match
func pointer or call to match function returning true value.
6. Updates fc_exch_recv to accept incoming frame on local port using
only lport pointer and frame pointer without specifying EM instance
of incoming frame. Instead modified fc_exch_recv to locate EM for the
incoming frame by matching xid of incoming frame against a EM xid range.
This change was required to use EM list in libfc Rx path and after this
change the lport fc_exch_mgr pointer emp is not needed anymore, so
removed emp pointer.
7. Updates fnic for removed lport emp pointer and above modified libfc APIs
fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free.
8. Removes exch_get and exch_put from libfc_function_template as these
are no longer needed with EM anchor list and its match function use.
Also removes its default function fc_exch_get.
A defect this patch introduced regarding the libfc initialization order in
the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-07-29 18:05:10 -06:00
|
|
|
* Specified match function is used in allocating exchanges
|
|
|
|
* from newly allocated EM.
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
|
|
|
struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
|
|
|
|
enum fc_class class,
|
|
|
|
u16 min_xid,
|
[SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor list
Modifies current code to use EM anchor list in EM allocation, EM free,
EM reset, exch allocation and exch lookup code paths.
1. Modifies fc_exch_mgr_alloc to accept EM match function and then
have allocated EM added to the lport using fc_exch_mgr_add API
while also updating EM kref for newly added EM.
2. Updates fc_exch_mgr_free API to accept only lport pointer instead
EM and then have this API free all EMs of the lport from EM anchor
list.
3. Removes single lport pointer link from the EM, which was used in
associating lport pointer in newly allocated exchange. Instead have
lport pointer passed along new exchange allocation call path and
then store passed lport pointer in newly allocated exchange, this
will allow a single EM instance to be used across more than one
lport and used in EM reset to reset only lport specific exchanges.
4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list
of the lport, adds additional exch lport pointer (ep->lp) check for
shared EM case to reset exchange specific to a lport requested reset.
5. Updates exch allocation API fc_exch_alloc to use EM anchor list and
its anchor match func pointer. The fc_exch_alloc will walk the list
of EMs until it finds a match, a match will be either null match
func pointer or call to match function returning true value.
6. Updates fc_exch_recv to accept incoming frame on local port using
only lport pointer and frame pointer without specifying EM instance
of incoming frame. Instead modified fc_exch_recv to locate EM for the
incoming frame by matching xid of incoming frame against a EM xid range.
This change was required to use EM list in libfc Rx path and after this
change the lport fc_exch_mgr pointer emp is not needed anymore, so
removed emp pointer.
7. Updates fnic for removed lport emp pointer and above modified libfc APIs
fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free.
8. Removes exch_get and exch_put from libfc_function_template as these
are no longer needed with EM anchor list and its match function use.
Also removes its default function fc_exch_get.
A defect this patch introduced regarding the libfc initialization order in
the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-07-29 18:05:10 -06:00
|
|
|
u16 max_xid,
|
|
|
|
bool (*match)(struct fc_frame *));
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
[SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor list
Modifies current code to use EM anchor list in EM allocation, EM free,
EM reset, exch allocation and exch lookup code paths.
1. Modifies fc_exch_mgr_alloc to accept EM match function and then
have allocated EM added to the lport using fc_exch_mgr_add API
while also updating EM kref for newly added EM.
2. Updates fc_exch_mgr_free API to accept only lport pointer instead
EM and then have this API free all EMs of the lport from EM anchor
list.
3. Removes single lport pointer link from the EM, which was used in
associating lport pointer in newly allocated exchange. Instead have
lport pointer passed along new exchange allocation call path and
then store passed lport pointer in newly allocated exchange, this
will allow a single EM instance to be used across more than one
lport and used in EM reset to reset only lport specific exchanges.
4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list
of the lport, adds additional exch lport pointer (ep->lp) check for
shared EM case to reset exchange specific to a lport requested reset.
5. Updates exch allocation API fc_exch_alloc to use EM anchor list and
its anchor match func pointer. The fc_exch_alloc will walk the list
of EMs until it finds a match, a match will be either null match
func pointer or call to match function returning true value.
6. Updates fc_exch_recv to accept incoming frame on local port using
only lport pointer and frame pointer without specifying EM instance
of incoming frame. Instead modified fc_exch_recv to locate EM for the
incoming frame by matching xid of incoming frame against a EM xid range.
This change was required to use EM list in libfc Rx path and after this
change the lport fc_exch_mgr pointer emp is not needed anymore, so
removed emp pointer.
7. Updates fnic for removed lport emp pointer and above modified libfc APIs
fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free.
8. Removes exch_get and exch_put from libfc_function_template as these
are no longer needed with EM anchor list and its match function use.
Also removes its default function fc_exch_get.
A defect this patch introduced regarding the libfc initialization order in
the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-07-29 18:05:10 -06:00
|
|
|
* Free all exchange managers of a lport.
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
[SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor list
Modifies current code to use EM anchor list in EM allocation, EM free,
EM reset, exch allocation and exch lookup code paths.
1. Modifies fc_exch_mgr_alloc to accept EM match function and then
have allocated EM added to the lport using fc_exch_mgr_add API
while also updating EM kref for newly added EM.
2. Updates fc_exch_mgr_free API to accept only lport pointer instead
EM and then have this API free all EMs of the lport from EM anchor
list.
3. Removes single lport pointer link from the EM, which was used in
associating lport pointer in newly allocated exchange. Instead have
lport pointer passed along new exchange allocation call path and
then store passed lport pointer in newly allocated exchange, this
will allow a single EM instance to be used across more than one
lport and used in EM reset to reset only lport specific exchanges.
4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list
of the lport, adds additional exch lport pointer (ep->lp) check for
shared EM case to reset exchange specific to a lport requested reset.
5. Updates exch allocation API fc_exch_alloc to use EM anchor list and
its anchor match func pointer. The fc_exch_alloc will walk the list
of EMs until it finds a match, a match will be either null match
func pointer or call to match function returning true value.
6. Updates fc_exch_recv to accept incoming frame on local port using
only lport pointer and frame pointer without specifying EM instance
of incoming frame. Instead modified fc_exch_recv to locate EM for the
incoming frame by matching xid of incoming frame against a EM xid range.
This change was required to use EM list in libfc Rx path and after this
change the lport fc_exch_mgr pointer emp is not needed anymore, so
removed emp pointer.
7. Updates fnic for removed lport emp pointer and above modified libfc APIs
fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free.
8. Removes exch_get and exch_put from libfc_function_template as these
are no longer needed with EM anchor list and its match function use.
Also removes its default function fc_exch_get.
A defect this patch introduced regarding the libfc initialization order in
the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-07-29 18:05:10 -06:00
|
|
|
void fc_exch_mgr_free(struct fc_lport *lport);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Receive a frame on specified local port and exchange manager.
|
|
|
|
*/
|
[SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor list
Modifies current code to use EM anchor list in EM allocation, EM free,
EM reset, exch allocation and exch lookup code paths.
1. Modifies fc_exch_mgr_alloc to accept EM match function and then
have allocated EM added to the lport using fc_exch_mgr_add API
while also updating EM kref for newly added EM.
2. Updates fc_exch_mgr_free API to accept only lport pointer instead
EM and then have this API free all EMs of the lport from EM anchor
list.
3. Removes single lport pointer link from the EM, which was used in
associating lport pointer in newly allocated exchange. Instead have
lport pointer passed along new exchange allocation call path and
then store passed lport pointer in newly allocated exchange, this
will allow a single EM instance to be used across more than one
lport and used in EM reset to reset only lport specific exchanges.
4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list
of the lport, adds additional exch lport pointer (ep->lp) check for
shared EM case to reset exchange specific to a lport requested reset.
5. Updates exch allocation API fc_exch_alloc to use EM anchor list and
its anchor match func pointer. The fc_exch_alloc will walk the list
of EMs until it finds a match, a match will be either null match
func pointer or call to match function returning true value.
6. Updates fc_exch_recv to accept incoming frame on local port using
only lport pointer and frame pointer without specifying EM instance
of incoming frame. Instead modified fc_exch_recv to locate EM for the
incoming frame by matching xid of incoming frame against a EM xid range.
This change was required to use EM list in libfc Rx path and after this
change the lport fc_exch_mgr pointer emp is not needed anymore, so
removed emp pointer.
7. Updates fnic for removed lport emp pointer and above modified libfc APIs
fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free.
8. Removes exch_get and exch_put from libfc_function_template as these
are no longer needed with EM anchor list and its match function use.
Also removes its default function fc_exch_get.
A defect this patch introduced regarding the libfc initialization order in
the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-07-29 18:05:10 -06:00
|
|
|
void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
[SCSI] fcoe, libfc: fully makes use of per cpu exch pool and then removes em_lock
1. Updates fcoe_rcv() to queue incoming frames to the fcoe per
cpu thread on which this frame's exch was originated and simply
use current cpu for request exch not originated by initiator.
It is redundant to add this code under CONFIG_SMP, so removes
CONFIG_SMP uses around this code.
2. Updates fc_exch_em_alloc, fc_exch_delete, fc_exch_find to use
per cpu exch pools, here fc_exch_delete is rename of older
fc_exch_mgr_delete_ep since ep/exch are now deleted in pools
of EM and so brief new name is sufficient and better name.
Updates these functions to map exch id to their index into exch
pool using fc_cpu_mask, fc_cpu_order and EM min_xid.
This mapping is as per detailed explanation about this in
last patch and basically this is just as lower fc_cpu_mask
bits of exch id as cpu number and upper bit sum of EM min_xid
and exch index in pool.
Uses pool next_index to keep track of exch allocation from
pool along with pool_max_index as upper bound of exches array
in pool.
3. Adds exch pool ptr to fc_exch to free exch to its pool in
fc_exch_delete.
4. Updates fc_exch_mgr_reset to reset all exch pools of an EM,
this required adding fc_exch_pool_reset func to reset exches
in pool and then have fc_exch_mgr_reset call fc_exch_pool_reset
for each pool within each EM for a lport.
5. Removes no longer needed exches array, em_lock, next_xid, and
total_exches from struct fc_exch_mgr, these are not needed after
use of per cpu exch pool, also removes not used max_read,
last_read from struct fc_exch_mgr.
6. Updates locking notes for exch pool lock with fc_exch lock and
uses pool lock in exch allocation, lookup and reset.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-08-25 14:58:53 -06:00
|
|
|
* Reset all EMs of a lport, releasing its all sequences and
|
|
|
|
* exchanges. If sid is non-zero, then reset only exchanges
|
|
|
|
* we sourced from that FID. If did is non-zero, reset only
|
|
|
|
* exchanges destined to that FID.
|
2008-12-09 16:10:17 -07:00
|
|
|
*/
|
2009-02-27 11:54:35 -07:00
|
|
|
void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
|
2008-12-09 16:10:17 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Functions for fc_functions_template
|
|
|
|
*/
|
|
|
|
void fc_get_host_speed(struct Scsi_Host *shost);
|
|
|
|
void fc_get_host_port_type(struct Scsi_Host *shost);
|
|
|
|
void fc_get_host_port_state(struct Scsi_Host *shost);
|
|
|
|
void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout);
|
|
|
|
struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *);
|
|
|
|
|
|
|
|
#endif /* _LIBFC_H_ */
|