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WSL2-Linux-Kernel/drivers/scsi/csiostor/csio_lnode.c

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/*
* This file is part of the Chelsio FCoE driver for Linux.
*
* Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/utsname.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport_fc.h>
#include <asm/unaligned.h>
#include <scsi/fc/fc_els.h>
#include <scsi/fc/fc_fs.h>
#include <scsi/fc/fc_gs.h>
#include <scsi/fc/fc_ms.h>
#include "csio_hw.h"
#include "csio_mb.h"
#include "csio_lnode.h"
#include "csio_rnode.h"
int csio_fcoe_rnodes = 1024;
int csio_fdmi_enable = 1;
#define PORT_ID_PTR(_x) ((uint8_t *)(&_x) + 1)
/* Lnode SM declarations */
static void csio_lns_uninit(struct csio_lnode *, enum csio_ln_ev);
static void csio_lns_online(struct csio_lnode *, enum csio_ln_ev);
static void csio_lns_ready(struct csio_lnode *, enum csio_ln_ev);
static void csio_lns_offline(struct csio_lnode *, enum csio_ln_ev);
static int csio_ln_mgmt_submit_req(struct csio_ioreq *,
void (*io_cbfn) (struct csio_hw *, struct csio_ioreq *),
enum fcoe_cmn_type, struct csio_dma_buf *, uint32_t);
/* LN event mapping */
static enum csio_ln_ev fwevt_to_lnevt[] = {
CSIO_LNE_NONE, /* None */
CSIO_LNE_NONE, /* PLOGI_ACC_RCVD */
CSIO_LNE_NONE, /* PLOGI_RJT_RCVD */
CSIO_LNE_NONE, /* PLOGI_RCVD */
CSIO_LNE_NONE, /* PLOGO_RCVD */
CSIO_LNE_NONE, /* PRLI_ACC_RCVD */
CSIO_LNE_NONE, /* PRLI_RJT_RCVD */
CSIO_LNE_NONE, /* PRLI_RCVD */
CSIO_LNE_NONE, /* PRLO_RCVD */
CSIO_LNE_NONE, /* NPORT_ID_CHGD */
CSIO_LNE_LOGO, /* FLOGO_RCVD */
CSIO_LNE_LOGO, /* CLR_VIRT_LNK_RCVD */
CSIO_LNE_FAB_INIT_DONE,/* FLOGI_ACC_RCVD */
CSIO_LNE_NONE, /* FLOGI_RJT_RCVD */
CSIO_LNE_FAB_INIT_DONE,/* FDISC_ACC_RCVD */
CSIO_LNE_NONE, /* FDISC_RJT_RCVD */
CSIO_LNE_NONE, /* FLOGI_TMO_MAX_RETRY */
CSIO_LNE_NONE, /* IMPL_LOGO_ADISC_ACC */
CSIO_LNE_NONE, /* IMPL_LOGO_ADISC_RJT */
CSIO_LNE_NONE, /* IMPL_LOGO_ADISC_CNFLT */
CSIO_LNE_NONE, /* PRLI_TMO */
CSIO_LNE_NONE, /* ADISC_TMO */
CSIO_LNE_NONE, /* RSCN_DEV_LOST */
CSIO_LNE_NONE, /* SCR_ACC_RCVD */
CSIO_LNE_NONE, /* ADISC_RJT_RCVD */
CSIO_LNE_NONE, /* LOGO_SNT */
CSIO_LNE_NONE, /* PROTO_ERR_IMPL_LOGO */
};
#define CSIO_FWE_TO_LNE(_evt) ((_evt > PROTO_ERR_IMPL_LOGO) ? \
CSIO_LNE_NONE : \
fwevt_to_lnevt[_evt])
#define csio_ct_rsp(cp) (((struct fc_ct_hdr *)cp)->ct_cmd)
#define csio_ct_reason(cp) (((struct fc_ct_hdr *)cp)->ct_reason)
#define csio_ct_expl(cp) (((struct fc_ct_hdr *)cp)->ct_explan)
#define csio_ct_get_pld(cp) ((void *)(((uint8_t *)cp) + FC_CT_HDR_LEN))
/*
* csio_ln_match_by_portid - lookup lnode using given portid.
* @hw: HW module
* @portid: port-id.
*
* If found, returns lnode matching given portid otherwise returns NULL.
*/
static struct csio_lnode *
csio_ln_lookup_by_portid(struct csio_hw *hw, uint8_t portid)
{
struct csio_lnode *ln = hw->rln;
struct list_head *tmp;
/* Match siblings lnode with portid */
list_for_each(tmp, &hw->sln_head) {
ln = (struct csio_lnode *) tmp;
if (ln->portid == portid)
return ln;
}
return NULL;
}
/*
* csio_ln_lookup_by_vnpi - Lookup lnode using given vnp id.
* @hw - HW module
* @vnpi - vnp index.
* Returns - If found, returns lnode matching given vnp id
* otherwise returns NULL.
*/
static struct csio_lnode *
csio_ln_lookup_by_vnpi(struct csio_hw *hw, uint32_t vnp_id)
{
struct list_head *tmp1, *tmp2;
struct csio_lnode *sln = NULL, *cln = NULL;
if (list_empty(&hw->sln_head)) {
CSIO_INC_STATS(hw, n_lnlkup_miss);
return NULL;
}
/* Traverse sibling lnodes */
list_for_each(tmp1, &hw->sln_head) {
sln = (struct csio_lnode *) tmp1;
/* Match sibling lnode */
if (sln->vnp_flowid == vnp_id)
return sln;
if (list_empty(&sln->cln_head))
continue;
/* Traverse children lnodes */
list_for_each(tmp2, &sln->cln_head) {
cln = (struct csio_lnode *) tmp2;
if (cln->vnp_flowid == vnp_id)
return cln;
}
}
CSIO_INC_STATS(hw, n_lnlkup_miss);
return NULL;
}
/**
* csio_lnode_lookup_by_wwpn - Lookup lnode using given wwpn.
* @hw: HW module.
* @wwpn: WWPN.
*
* If found, returns lnode matching given wwpn, returns NULL otherwise.
*/
struct csio_lnode *
csio_lnode_lookup_by_wwpn(struct csio_hw *hw, uint8_t *wwpn)
{
struct list_head *tmp1, *tmp2;
struct csio_lnode *sln = NULL, *cln = NULL;
if (list_empty(&hw->sln_head)) {
CSIO_INC_STATS(hw, n_lnlkup_miss);
return NULL;
}
/* Traverse sibling lnodes */
list_for_each(tmp1, &hw->sln_head) {
sln = (struct csio_lnode *) tmp1;
/* Match sibling lnode */
if (!memcmp(csio_ln_wwpn(sln), wwpn, 8))
return sln;
if (list_empty(&sln->cln_head))
continue;
/* Traverse children lnodes */
list_for_each(tmp2, &sln->cln_head) {
cln = (struct csio_lnode *) tmp2;
if (!memcmp(csio_ln_wwpn(cln), wwpn, 8))
return cln;
}
}
return NULL;
}
/* FDMI */
static void
csio_fill_ct_iu(void *buf, uint8_t type, uint8_t sub_type, uint16_t op)
{
struct fc_ct_hdr *cmd = (struct fc_ct_hdr *)buf;
cmd->ct_rev = FC_CT_REV;
cmd->ct_fs_type = type;
cmd->ct_fs_subtype = sub_type;
cmd->ct_cmd = htons(op);
}
static int
csio_hostname(uint8_t *buf, size_t buf_len)
{
if (snprintf(buf, buf_len, "%s", init_utsname()->nodename) > 0)
return 0;
return -1;
}
static int
csio_osname(uint8_t *buf, size_t buf_len)
{
if (snprintf(buf, buf_len, "%s %s %s",
init_utsname()->sysname,
init_utsname()->release,
init_utsname()->version) > 0)
return 0;
return -1;
}
static inline void
csio_append_attrib(uint8_t **ptr, uint16_t type, void *val, size_t val_len)
{
uint16_t len;
struct fc_fdmi_attr_entry *ae = (struct fc_fdmi_attr_entry *)*ptr;
if (WARN_ON(val_len > U16_MAX))
return;
len = val_len;
ae->type = htons(type);
len += 4; /* includes attribute type and length */
len = (len + 3) & ~3; /* should be multiple of 4 bytes */
ae->len = htons(len);
memcpy(ae->value, val, val_len);
if (len > val_len)
memset(ae->value + val_len, 0, len - val_len);
*ptr += len;
}
/*
* csio_ln_fdmi_done - FDMI registeration completion
* @hw: HW context
* @fdmi_req: fdmi request
*/
static void
csio_ln_fdmi_done(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
{
void *cmd;
struct csio_lnode *ln = fdmi_req->lnode;
if (fdmi_req->wr_status != FW_SUCCESS) {
csio_ln_dbg(ln, "WR error:%x in processing fdmi rpa cmd\n",
fdmi_req->wr_status);
CSIO_INC_STATS(ln, n_fdmi_err);
}
cmd = fdmi_req->dma_buf.vaddr;
if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
csio_ln_dbg(ln, "fdmi rpa cmd rejected reason %x expl %x\n",
csio_ct_reason(cmd), csio_ct_expl(cmd));
}
}
/*
* csio_ln_fdmi_rhba_cbfn - RHBA completion
* @hw: HW context
* @fdmi_req: fdmi request
*/
static void
csio_ln_fdmi_rhba_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
{
void *cmd;
uint8_t *pld;
uint32_t len = 0;
__be32 val;
__be16 mfs;
uint32_t numattrs = 0;
struct csio_lnode *ln = fdmi_req->lnode;
struct fs_fdmi_attrs *attrib_blk;
struct fc_fdmi_port_name *port_name;
uint8_t buf[64];
uint8_t *fc4_type;
if (fdmi_req->wr_status != FW_SUCCESS) {
csio_ln_dbg(ln, "WR error:%x in processing fdmi rhba cmd\n",
fdmi_req->wr_status);
CSIO_INC_STATS(ln, n_fdmi_err);
}
cmd = fdmi_req->dma_buf.vaddr;
if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
csio_ln_dbg(ln, "fdmi rhba cmd rejected reason %x expl %x\n",
csio_ct_reason(cmd), csio_ct_expl(cmd));
}
if (!csio_is_rnode_ready(fdmi_req->rnode)) {
CSIO_INC_STATS(ln, n_fdmi_err);
return;
}
/* Prepare CT hdr for RPA cmd */
memset(cmd, 0, FC_CT_HDR_LEN);
csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_RPA);
/* Prepare RPA payload */
pld = (uint8_t *)csio_ct_get_pld(cmd);
port_name = (struct fc_fdmi_port_name *)pld;
memcpy(&port_name->portname, csio_ln_wwpn(ln), 8);
pld += sizeof(*port_name);
/* Start appending Port attributes */
attrib_blk = (struct fs_fdmi_attrs *)pld;
attrib_blk->numattrs = 0;
len += sizeof(attrib_blk->numattrs);
pld += sizeof(attrib_blk->numattrs);
fc4_type = &buf[0];
memset(fc4_type, 0, FC_FDMI_PORT_ATTR_FC4TYPES_LEN);
fc4_type[2] = 1;
fc4_type[7] = 1;
csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_FC4TYPES,
fc4_type, FC_FDMI_PORT_ATTR_FC4TYPES_LEN);
numattrs++;
val = htonl(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_SUPPORTEDSPEED,
&val,
FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN);
numattrs++;
if (hw->pport[ln->portid].link_speed == FW_PORT_CAP_SPEED_1G)
val = htonl(FC_PORTSPEED_1GBIT);
else if (hw->pport[ln->portid].link_speed == FW_PORT_CAP_SPEED_10G)
val = htonl(FC_PORTSPEED_10GBIT);
else
val = htonl(CSIO_HBA_PORTSPEED_UNKNOWN);
csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_CURRENTPORTSPEED,
&val, FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN);
numattrs++;
mfs = ln->ln_sparm.csp.sp_bb_data;
csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_MAXFRAMESIZE,
&mfs, sizeof(mfs));
numattrs++;
strcpy(buf, "csiostor");
csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_OSDEVICENAME, buf,
strlen(buf));
numattrs++;
if (!csio_hostname(buf, sizeof(buf))) {
csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_HOSTNAME,
buf, strlen(buf));
numattrs++;
}
attrib_blk->numattrs = htonl(numattrs);
len = (uint32_t)(pld - (uint8_t *)cmd);
/* Submit FDMI RPA request */
spin_lock_irq(&hw->lock);
if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_done,
FCOE_CT, &fdmi_req->dma_buf, len)) {
CSIO_INC_STATS(ln, n_fdmi_err);
csio_ln_dbg(ln, "Failed to issue fdmi rpa req\n");
}
spin_unlock_irq(&hw->lock);
}
/*
* csio_ln_fdmi_dprt_cbfn - DPRT completion
* @hw: HW context
* @fdmi_req: fdmi request
*/
static void
csio_ln_fdmi_dprt_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
{
void *cmd;
uint8_t *pld;
uint32_t len = 0;
uint32_t numattrs = 0;
__be32 maxpayload = htonl(65536);
struct fc_fdmi_hba_identifier *hbaid;
struct csio_lnode *ln = fdmi_req->lnode;
struct fc_fdmi_rpl *reg_pl;
struct fs_fdmi_attrs *attrib_blk;
uint8_t buf[64];
if (fdmi_req->wr_status != FW_SUCCESS) {
csio_ln_dbg(ln, "WR error:%x in processing fdmi dprt cmd\n",
fdmi_req->wr_status);
CSIO_INC_STATS(ln, n_fdmi_err);
}
if (!csio_is_rnode_ready(fdmi_req->rnode)) {
CSIO_INC_STATS(ln, n_fdmi_err);
return;
}
cmd = fdmi_req->dma_buf.vaddr;
if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
csio_ln_dbg(ln, "fdmi dprt cmd rejected reason %x expl %x\n",
csio_ct_reason(cmd), csio_ct_expl(cmd));
}
/* Prepare CT hdr for RHBA cmd */
memset(cmd, 0, FC_CT_HDR_LEN);
csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_RHBA);
len = FC_CT_HDR_LEN;
/* Prepare RHBA payload */
pld = (uint8_t *)csio_ct_get_pld(cmd);
hbaid = (struct fc_fdmi_hba_identifier *)pld;
memcpy(&hbaid->id, csio_ln_wwpn(ln), 8); /* HBA identifer */
pld += sizeof(*hbaid);
/* Register one port per hba */
reg_pl = (struct fc_fdmi_rpl *)pld;
reg_pl->numport = htonl(1);
memcpy(&reg_pl->port[0].portname, csio_ln_wwpn(ln), 8);
pld += sizeof(*reg_pl);
/* Start appending HBA attributes hba */
attrib_blk = (struct fs_fdmi_attrs *)pld;
attrib_blk->numattrs = 0;
len += sizeof(attrib_blk->numattrs);
pld += sizeof(attrib_blk->numattrs);
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_NODENAME, csio_ln_wwnn(ln),
FC_FDMI_HBA_ATTR_NODENAME_LEN);
numattrs++;
memset(buf, 0, sizeof(buf));
strcpy(buf, "Chelsio Communications");
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MANUFACTURER, buf,
strlen(buf));
numattrs++;
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_SERIALNUMBER,
hw->vpd.sn, sizeof(hw->vpd.sn));
numattrs++;
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MODEL, hw->vpd.id,
sizeof(hw->vpd.id));
numattrs++;
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MODELDESCRIPTION,
hw->model_desc, strlen(hw->model_desc));
numattrs++;
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_HARDWAREVERSION,
hw->hw_ver, sizeof(hw->hw_ver));
numattrs++;
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_FIRMWAREVERSION,
hw->fwrev_str, strlen(hw->fwrev_str));
numattrs++;
if (!csio_osname(buf, sizeof(buf))) {
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_OSNAMEVERSION,
buf, strlen(buf));
numattrs++;
}
csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MAXCTPAYLOAD,
&maxpayload, FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN);
len = (uint32_t)(pld - (uint8_t *)cmd);
numattrs++;
attrib_blk->numattrs = htonl(numattrs);
/* Submit FDMI RHBA request */
spin_lock_irq(&hw->lock);
if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_rhba_cbfn,
FCOE_CT, &fdmi_req->dma_buf, len)) {
CSIO_INC_STATS(ln, n_fdmi_err);
csio_ln_dbg(ln, "Failed to issue fdmi rhba req\n");
}
spin_unlock_irq(&hw->lock);
}
/*
* csio_ln_fdmi_dhba_cbfn - DHBA completion
* @hw: HW context
* @fdmi_req: fdmi request
*/
static void
csio_ln_fdmi_dhba_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
{
struct csio_lnode *ln = fdmi_req->lnode;
void *cmd;
struct fc_fdmi_port_name *port_name;
uint32_t len;
if (fdmi_req->wr_status != FW_SUCCESS) {
csio_ln_dbg(ln, "WR error:%x in processing fdmi dhba cmd\n",
fdmi_req->wr_status);
CSIO_INC_STATS(ln, n_fdmi_err);
}
if (!csio_is_rnode_ready(fdmi_req->rnode)) {
CSIO_INC_STATS(ln, n_fdmi_err);
return;
}
cmd = fdmi_req->dma_buf.vaddr;
if (ntohs(csio_ct_rsp(cmd)) != FC_FS_ACC) {
csio_ln_dbg(ln, "fdmi dhba cmd rejected reason %x expl %x\n",
csio_ct_reason(cmd), csio_ct_expl(cmd));
}
/* Send FDMI cmd to de-register any Port attributes if registered
* before
*/
/* Prepare FDMI DPRT cmd */
memset(cmd, 0, FC_CT_HDR_LEN);
csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_DPRT);
len = FC_CT_HDR_LEN;
port_name = (struct fc_fdmi_port_name *)csio_ct_get_pld(cmd);
memcpy(&port_name->portname, csio_ln_wwpn(ln), 8);
len += sizeof(*port_name);
/* Submit FDMI request */
spin_lock_irq(&hw->lock);
if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_dprt_cbfn,
FCOE_CT, &fdmi_req->dma_buf, len)) {
CSIO_INC_STATS(ln, n_fdmi_err);
csio_ln_dbg(ln, "Failed to issue fdmi dprt req\n");
}
spin_unlock_irq(&hw->lock);
}
/**
* csio_ln_fdmi_start - Start an FDMI request.
* @ln: lnode
* @context: session context
*
* Issued with lock held.
*/
int
csio_ln_fdmi_start(struct csio_lnode *ln, void *context)
{
struct csio_ioreq *fdmi_req;
struct csio_rnode *fdmi_rn = (struct csio_rnode *)context;
void *cmd;
struct fc_fdmi_hba_identifier *hbaid;
uint32_t len;
if (!(ln->flags & CSIO_LNF_FDMI_ENABLE))
return -EPROTONOSUPPORT;
if (!csio_is_rnode_ready(fdmi_rn))
CSIO_INC_STATS(ln, n_fdmi_err);
/* Send FDMI cmd to de-register any HBA attributes if registered
* before
*/
fdmi_req = ln->mgmt_req;
fdmi_req->lnode = ln;
fdmi_req->rnode = fdmi_rn;
/* Prepare FDMI DHBA cmd */
cmd = fdmi_req->dma_buf.vaddr;
memset(cmd, 0, FC_CT_HDR_LEN);
csio_fill_ct_iu(cmd, FC_FST_MGMT, FC_FDMI_SUBTYPE, FC_FDMI_DHBA);
len = FC_CT_HDR_LEN;
hbaid = (struct fc_fdmi_hba_identifier *)csio_ct_get_pld(cmd);
memcpy(&hbaid->id, csio_ln_wwpn(ln), 8);
len += sizeof(*hbaid);
/* Submit FDMI request */
if (csio_ln_mgmt_submit_req(fdmi_req, csio_ln_fdmi_dhba_cbfn,
FCOE_CT, &fdmi_req->dma_buf, len)) {
CSIO_INC_STATS(ln, n_fdmi_err);
csio_ln_dbg(ln, "Failed to issue fdmi dhba req\n");
}
return 0;
}
/*
* csio_ln_vnp_read_cbfn - vnp read completion handler.
* @hw: HW lnode
* @cbfn: Completion handler.
*
* Reads vnp response and updates ln parameters.
*/
static void
csio_ln_vnp_read_cbfn(struct csio_hw *hw, struct csio_mb *mbp)
{
struct csio_lnode *ln = ((struct csio_lnode *)mbp->priv);
struct fw_fcoe_vnp_cmd *rsp = (struct fw_fcoe_vnp_cmd *)(mbp->mb);
struct fc_els_csp *csp;
struct fc_els_cssp *clsp;
enum fw_retval retval;
__be32 nport_id;
retval = FW_CMD_RETVAL_G(ntohl(rsp->alloc_to_len16));
if (retval != FW_SUCCESS) {
csio_err(hw, "FCOE VNP read cmd returned error:0x%x\n", retval);
mempool_free(mbp, hw->mb_mempool);
return;
}
spin_lock_irq(&hw->lock);
memcpy(ln->mac, rsp->vnport_mac, sizeof(ln->mac));
memcpy(&nport_id, &rsp->vnport_mac[3], sizeof(uint8_t)*3);
ln->nport_id = ntohl(nport_id);
ln->nport_id = ln->nport_id >> 8;
/* Update WWNs */
/*
* This may look like a duplication of what csio_fcoe_enable_link()
* does, but is absolutely necessary if the vnpi changes between
* a FCOE LINK UP and FCOE LINK DOWN.
*/
memcpy(csio_ln_wwnn(ln), rsp->vnport_wwnn, 8);
memcpy(csio_ln_wwpn(ln), rsp->vnport_wwpn, 8);
/* Copy common sparam */
csp = (struct fc_els_csp *)rsp->cmn_srv_parms;
ln->ln_sparm.csp.sp_hi_ver = csp->sp_hi_ver;
ln->ln_sparm.csp.sp_lo_ver = csp->sp_lo_ver;
ln->ln_sparm.csp.sp_bb_cred = csp->sp_bb_cred;
ln->ln_sparm.csp.sp_features = csp->sp_features;
ln->ln_sparm.csp.sp_bb_data = csp->sp_bb_data;
ln->ln_sparm.csp.sp_r_a_tov = csp->sp_r_a_tov;
ln->ln_sparm.csp.sp_e_d_tov = csp->sp_e_d_tov;
/* Copy word 0 & word 1 of class sparam */
clsp = (struct fc_els_cssp *)rsp->clsp_word_0_1;
ln->ln_sparm.clsp[2].cp_class = clsp->cp_class;
ln->ln_sparm.clsp[2].cp_init = clsp->cp_init;
ln->ln_sparm.clsp[2].cp_recip = clsp->cp_recip;
ln->ln_sparm.clsp[2].cp_rdfs = clsp->cp_rdfs;
spin_unlock_irq(&hw->lock);
mempool_free(mbp, hw->mb_mempool);
/* Send an event to update local attribs */
csio_lnode_async_event(ln, CSIO_LN_FC_ATTRIB_UPDATE);
}
/*
* csio_ln_vnp_read - Read vnp params.
* @ln: lnode
* @cbfn: Completion handler.
*
* Issued with lock held.
*/
static int
csio_ln_vnp_read(struct csio_lnode *ln,
void (*cbfn) (struct csio_hw *, struct csio_mb *))
{
struct csio_hw *hw = ln->hwp;
struct csio_mb *mbp;
/* Allocate Mbox request */
mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
if (!mbp) {
CSIO_INC_STATS(hw, n_err_nomem);
return -ENOMEM;
}
/* Prepare VNP Command */
csio_fcoe_vnp_read_init_mb(ln, mbp,
CSIO_MB_DEFAULT_TMO,
ln->fcf_flowid,
ln->vnp_flowid,
cbfn);
/* Issue MBOX cmd */
if (csio_mb_issue(hw, mbp)) {
csio_err(hw, "Failed to issue mbox FCoE VNP command\n");
mempool_free(mbp, hw->mb_mempool);
return -EINVAL;
}
return 0;
}
/*
* csio_fcoe_enable_link - Enable fcoe link.
* @ln: lnode
* @enable: enable/disable
* Issued with lock held.
* Issues mbox cmd to bring up FCOE link on port associated with given ln.
*/
static int
csio_fcoe_enable_link(struct csio_lnode *ln, bool enable)
{
struct csio_hw *hw = ln->hwp;
struct csio_mb *mbp;
enum fw_retval retval;
uint8_t portid;
uint8_t sub_op;
struct fw_fcoe_link_cmd *lcmd;
int i;
mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
if (!mbp) {
CSIO_INC_STATS(hw, n_err_nomem);
return -ENOMEM;
}
portid = ln->portid;
sub_op = enable ? FCOE_LINK_UP : FCOE_LINK_DOWN;
csio_dbg(hw, "bringing FCOE LINK %s on Port:%d\n",
sub_op ? "UP" : "DOWN", portid);
csio_write_fcoe_link_cond_init_mb(ln, mbp, CSIO_MB_DEFAULT_TMO,
portid, sub_op, 0, 0, 0, NULL);
if (csio_mb_issue(hw, mbp)) {
csio_err(hw, "failed to issue FCOE LINK cmd on port[%d]\n",
portid);
mempool_free(mbp, hw->mb_mempool);
return -EINVAL;
}
retval = csio_mb_fw_retval(mbp);
if (retval != FW_SUCCESS) {
csio_err(hw,
"FCOE LINK %s cmd on port[%d] failed with "
"ret:x%x\n", sub_op ? "UP" : "DOWN", portid, retval);
mempool_free(mbp, hw->mb_mempool);
return -EINVAL;
}
if (!enable)
goto out;
lcmd = (struct fw_fcoe_link_cmd *)mbp->mb;
memcpy(csio_ln_wwnn(ln), lcmd->vnport_wwnn, 8);
memcpy(csio_ln_wwpn(ln), lcmd->vnport_wwpn, 8);
for (i = 0; i < CSIO_MAX_PPORTS; i++)
if (hw->pport[i].portid == portid)
memcpy(hw->pport[i].mac, lcmd->phy_mac, 6);
out:
mempool_free(mbp, hw->mb_mempool);
return 0;
}
/*
* csio_ln_read_fcf_cbfn - Read fcf parameters
* @ln: lnode
*
* read fcf response and Update ln fcf information.
*/
static void
csio_ln_read_fcf_cbfn(struct csio_hw *hw, struct csio_mb *mbp)
{
struct csio_lnode *ln = (struct csio_lnode *)mbp->priv;
struct csio_fcf_info *fcf_info;
struct fw_fcoe_fcf_cmd *rsp =
(struct fw_fcoe_fcf_cmd *)(mbp->mb);
enum fw_retval retval;
retval = FW_CMD_RETVAL_G(ntohl(rsp->retval_len16));
if (retval != FW_SUCCESS) {
csio_ln_err(ln, "FCOE FCF cmd failed with ret x%x\n",
retval);
mempool_free(mbp, hw->mb_mempool);
return;
}
spin_lock_irq(&hw->lock);
fcf_info = ln->fcfinfo;
fcf_info->priority = FW_FCOE_FCF_CMD_PRIORITY_GET(
ntohs(rsp->priority_pkd));
fcf_info->vf_id = ntohs(rsp->vf_id);
fcf_info->vlan_id = rsp->vlan_id;
fcf_info->max_fcoe_size = ntohs(rsp->max_fcoe_size);
fcf_info->fka_adv = be32_to_cpu(rsp->fka_adv);
fcf_info->fcfi = FW_FCOE_FCF_CMD_FCFI_GET(ntohl(rsp->op_to_fcfi));
fcf_info->fpma = FW_FCOE_FCF_CMD_FPMA_GET(rsp->fpma_to_portid);
fcf_info->spma = FW_FCOE_FCF_CMD_SPMA_GET(rsp->fpma_to_portid);
fcf_info->login = FW_FCOE_FCF_CMD_LOGIN_GET(rsp->fpma_to_portid);
fcf_info->portid = FW_FCOE_FCF_CMD_PORTID_GET(rsp->fpma_to_portid);
memcpy(fcf_info->fc_map, rsp->fc_map, sizeof(fcf_info->fc_map));
memcpy(fcf_info->mac, rsp->mac, sizeof(fcf_info->mac));
memcpy(fcf_info->name_id, rsp->name_id, sizeof(fcf_info->name_id));
memcpy(fcf_info->fabric, rsp->fabric, sizeof(fcf_info->fabric));
memcpy(fcf_info->spma_mac, rsp->spma_mac, sizeof(fcf_info->spma_mac));
spin_unlock_irq(&hw->lock);
mempool_free(mbp, hw->mb_mempool);
}
/*
* csio_ln_read_fcf_entry - Read fcf entry.
* @ln: lnode
* @cbfn: Completion handler.
*
* Issued with lock held.
*/
static int
csio_ln_read_fcf_entry(struct csio_lnode *ln,
void (*cbfn) (struct csio_hw *, struct csio_mb *))
{
struct csio_hw *hw = ln->hwp;
struct csio_mb *mbp;
mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
if (!mbp) {
CSIO_INC_STATS(hw, n_err_nomem);
return -ENOMEM;
}
/* Get FCoE FCF information */
csio_fcoe_read_fcf_init_mb(ln, mbp, CSIO_MB_DEFAULT_TMO,
ln->portid, ln->fcf_flowid, cbfn);
if (csio_mb_issue(hw, mbp)) {
csio_err(hw, "failed to issue FCOE FCF cmd\n");
mempool_free(mbp, hw->mb_mempool);
return -EINVAL;
}
return 0;
}
/*
* csio_handle_link_up - Logical Linkup event.
* @hw - HW module.
* @portid - Physical port number
* @fcfi - FCF index.
* @vnpi - VNP index.
* Returns - none.
*
* This event is received from FW, when virtual link is established between
* Physical port[ENode] and FCF. If its new vnpi, then local node object is
* created on this FCF and set to [ONLINE] state.
* Lnode waits for FW_RDEV_CMD event to be received indicating that
* Fabric login is completed and lnode moves to [READY] state.
*
* This called with hw lock held
*/
static void
csio_handle_link_up(struct csio_hw *hw, uint8_t portid, uint32_t fcfi,
uint32_t vnpi)
{
struct csio_lnode *ln = NULL;
/* Lookup lnode based on vnpi */
ln = csio_ln_lookup_by_vnpi(hw, vnpi);
if (!ln) {
/* Pick lnode based on portid */
ln = csio_ln_lookup_by_portid(hw, portid);
if (!ln) {
csio_err(hw, "failed to lookup fcoe lnode on port:%d\n",
portid);
CSIO_DB_ASSERT(0);
return;
}
/* Check if lnode has valid vnp flowid */
if (ln->vnp_flowid != CSIO_INVALID_IDX) {
/* New VN-Port */
spin_unlock_irq(&hw->lock);
csio_lnode_alloc(hw);
spin_lock_irq(&hw->lock);
if (!ln) {
csio_err(hw,
"failed to allocate fcoe lnode"
"for port:%d vnpi:x%x\n",
portid, vnpi);
CSIO_DB_ASSERT(0);
return;
}
ln->portid = portid;
}
ln->vnp_flowid = vnpi;
ln->dev_num &= ~0xFFFF;
ln->dev_num |= vnpi;
}
/*Initialize fcfi */
ln->fcf_flowid = fcfi;
csio_info(hw, "Port:%d - FCOE LINK UP\n", portid);
CSIO_INC_STATS(ln, n_link_up);
/* Send LINKUP event to SM */
csio_post_event(&ln->sm, CSIO_LNE_LINKUP);
}
/*
* csio_post_event_rns
* @ln - FCOE lnode
* @evt - Given rnode event
* Returns - none
*
* Posts given rnode event to all FCOE rnodes connected with given Lnode.
* This routine is invoked when lnode receives LINK_DOWN/DOWN_LINK/CLOSE
* event.
*
* This called with hw lock held
*/
static void
csio_post_event_rns(struct csio_lnode *ln, enum csio_rn_ev evt)
{
struct csio_rnode *rnhead = (struct csio_rnode *) &ln->rnhead;
struct list_head *tmp, *next;
struct csio_rnode *rn;
list_for_each_safe(tmp, next, &rnhead->sm.sm_list) {
rn = (struct csio_rnode *) tmp;
csio_post_event(&rn->sm, evt);
}
}
/*
* csio_cleanup_rns
* @ln - FCOE lnode
* Returns - none
*
* Frees all FCOE rnodes connected with given Lnode.
*
* This called with hw lock held
*/
static void
csio_cleanup_rns(struct csio_lnode *ln)
{
struct csio_rnode *rnhead = (struct csio_rnode *) &ln->rnhead;
struct list_head *tmp, *next_rn;
struct csio_rnode *rn;
list_for_each_safe(tmp, next_rn, &rnhead->sm.sm_list) {
rn = (struct csio_rnode *) tmp;
csio_put_rnode(ln, rn);
}
}
/*
* csio_post_event_lns
* @ln - FCOE lnode
* @evt - Given lnode event
* Returns - none
*
* Posts given lnode event to all FCOE lnodes connected with given Lnode.
* This routine is invoked when lnode receives LINK_DOWN/DOWN_LINK/CLOSE
* event.
*
* This called with hw lock held
*/
static void
csio_post_event_lns(struct csio_lnode *ln, enum csio_ln_ev evt)
{
struct list_head *tmp;
struct csio_lnode *cln, *sln;
/* If NPIV lnode, send evt only to that and return */
if (csio_is_npiv_ln(ln)) {
csio_post_event(&ln->sm, evt);
return;
}
sln = ln;
/* Traverse children lnodes list and send evt */
list_for_each(tmp, &sln->cln_head) {
cln = (struct csio_lnode *) tmp;
csio_post_event(&cln->sm, evt);
}
/* Send evt to parent lnode */
csio_post_event(&ln->sm, evt);
}
/*
* csio_ln_down - Lcoal nport is down
* @ln - FCOE Lnode
* Returns - none
*
* Sends LINK_DOWN events to Lnode and its associated NPIVs lnodes.
*
* This called with hw lock held
*/
static void
csio_ln_down(struct csio_lnode *ln)
{
csio_post_event_lns(ln, CSIO_LNE_LINK_DOWN);
}
/*
* csio_handle_link_down - Logical Linkdown event.
* @hw - HW module.
* @portid - Physical port number
* @fcfi - FCF index.
* @vnpi - VNP index.
* Returns - none
*
* This event is received from FW, when virtual link goes down between
* Physical port[ENode] and FCF. Lnode and its associated NPIVs lnode hosted on
* this vnpi[VN-Port] will be de-instantiated.
*
* This called with hw lock held
*/
static void
csio_handle_link_down(struct csio_hw *hw, uint8_t portid, uint32_t fcfi,
uint32_t vnpi)
{
struct csio_fcf_info *fp;
struct csio_lnode *ln;
/* Lookup lnode based on vnpi */
ln = csio_ln_lookup_by_vnpi(hw, vnpi);
if (ln) {
fp = ln->fcfinfo;
CSIO_INC_STATS(ln, n_link_down);
/*Warn if linkdown received if lnode is not in ready state */
if (!csio_is_lnode_ready(ln)) {
csio_ln_warn(ln,
"warn: FCOE link is already in offline "
"Ignoring Fcoe linkdown event on portid %d\n",
portid);
CSIO_INC_STATS(ln, n_evt_drop);
return;
}
/* Verify portid */
if (fp->portid != portid) {
csio_ln_warn(ln,
"warn: FCOE linkdown recv with "
"invalid port %d\n", portid);
CSIO_INC_STATS(ln, n_evt_drop);
return;
}
/* verify fcfi */
if (ln->fcf_flowid != fcfi) {
csio_ln_warn(ln,
"warn: FCOE linkdown recv with "
"invalid fcfi x%x\n", fcfi);
CSIO_INC_STATS(ln, n_evt_drop);
return;
}
csio_info(hw, "Port:%d - FCOE LINK DOWN\n", portid);
/* Send LINK_DOWN event to lnode s/m */
csio_ln_down(ln);
return;
} else {
csio_warn(hw,
"warn: FCOE linkdown recv with invalid vnpi x%x\n",
vnpi);
CSIO_INC_STATS(hw, n_evt_drop);
}
}
/*
* csio_is_lnode_ready - Checks FCOE lnode is in ready state.
* @ln: Lnode module
*
* Returns True if FCOE lnode is in ready state.
*/
int
csio_is_lnode_ready(struct csio_lnode *ln)
{
return (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready));
}
/*****************************************************************************/
/* START: Lnode SM */
/*****************************************************************************/
/*
* csio_lns_uninit - The request in uninit state.
* @ln - FCOE lnode.
* @evt - Event to be processed.
*
* Process the given lnode event which is currently in "uninit" state.
* Invoked with HW lock held.
* Return - none.
*/
static void
csio_lns_uninit(struct csio_lnode *ln, enum csio_ln_ev evt)
{
struct csio_hw *hw = csio_lnode_to_hw(ln);
struct csio_lnode *rln = hw->rln;
int rv;
CSIO_INC_STATS(ln, n_evt_sm[evt]);
switch (evt) {
case CSIO_LNE_LINKUP:
csio_set_state(&ln->sm, csio_lns_online);
/* Read FCF only for physical lnode */
if (csio_is_phys_ln(ln)) {
rv = csio_ln_read_fcf_entry(ln,
csio_ln_read_fcf_cbfn);
if (rv != 0) {
/* TODO: Send HW RESET event */
CSIO_INC_STATS(ln, n_err);
break;
}
/* Add FCF record */
list_add_tail(&ln->fcfinfo->list, &rln->fcf_lsthead);
}
rv = csio_ln_vnp_read(ln, csio_ln_vnp_read_cbfn);
if (rv != 0) {
/* TODO: Send HW RESET event */
CSIO_INC_STATS(ln, n_err);
}
break;
case CSIO_LNE_DOWN_LINK:
break;
default:
csio_ln_dbg(ln,
"unexp ln event %d recv from did:x%x in "
"ln state[uninit].\n", evt, ln->nport_id);
CSIO_INC_STATS(ln, n_evt_unexp);
break;
} /* switch event */
}
/*
* csio_lns_online - The request in online state.
* @ln - FCOE lnode.
* @evt - Event to be processed.
*
* Process the given lnode event which is currently in "online" state.
* Invoked with HW lock held.
* Return - none.
*/
static void
csio_lns_online(struct csio_lnode *ln, enum csio_ln_ev evt)
{
struct csio_hw *hw = csio_lnode_to_hw(ln);
CSIO_INC_STATS(ln, n_evt_sm[evt]);
switch (evt) {
case CSIO_LNE_LINKUP:
csio_ln_warn(ln,
"warn: FCOE link is up already "
"Ignoring linkup on port:%d\n", ln->portid);
CSIO_INC_STATS(ln, n_evt_drop);
break;
case CSIO_LNE_FAB_INIT_DONE:
csio_set_state(&ln->sm, csio_lns_ready);
spin_unlock_irq(&hw->lock);
csio_lnode_async_event(ln, CSIO_LN_FC_LINKUP);
spin_lock_irq(&hw->lock);
break;
case CSIO_LNE_LINK_DOWN:
/* Fall through */
case CSIO_LNE_DOWN_LINK:
csio_set_state(&ln->sm, csio_lns_uninit);
if (csio_is_phys_ln(ln)) {
/* Remove FCF entry */
list_del_init(&ln->fcfinfo->list);
}
break;
default:
csio_ln_dbg(ln,
"unexp ln event %d recv from did:x%x in "
"ln state[uninit].\n", evt, ln->nport_id);
CSIO_INC_STATS(ln, n_evt_unexp);
break;
} /* switch event */
}
/*
* csio_lns_ready - The request in ready state.
* @ln - FCOE lnode.
* @evt - Event to be processed.
*
* Process the given lnode event which is currently in "ready" state.
* Invoked with HW lock held.
* Return - none.
*/
static void
csio_lns_ready(struct csio_lnode *ln, enum csio_ln_ev evt)
{
struct csio_hw *hw = csio_lnode_to_hw(ln);
CSIO_INC_STATS(ln, n_evt_sm[evt]);
switch (evt) {
case CSIO_LNE_FAB_INIT_DONE:
csio_ln_dbg(ln,
"ignoring event %d recv from did x%x"
"in ln state[ready].\n", evt, ln->nport_id);
CSIO_INC_STATS(ln, n_evt_drop);
break;
case CSIO_LNE_LINK_DOWN:
csio_set_state(&ln->sm, csio_lns_offline);
csio_post_event_rns(ln, CSIO_RNFE_DOWN);
spin_unlock_irq(&hw->lock);
csio_lnode_async_event(ln, CSIO_LN_FC_LINKDOWN);
spin_lock_irq(&hw->lock);
if (csio_is_phys_ln(ln)) {
/* Remove FCF entry */
list_del_init(&ln->fcfinfo->list);
}
break;
case CSIO_LNE_DOWN_LINK:
csio_set_state(&ln->sm, csio_lns_offline);
csio_post_event_rns(ln, CSIO_RNFE_DOWN);
/* Host need to issue aborts in case if FW has not returned
* WRs with status "ABORTED"
*/
spin_unlock_irq(&hw->lock);
csio_lnode_async_event(ln, CSIO_LN_FC_LINKDOWN);
spin_lock_irq(&hw->lock);
if (csio_is_phys_ln(ln)) {
/* Remove FCF entry */
list_del_init(&ln->fcfinfo->list);
}
break;
case CSIO_LNE_CLOSE:
csio_set_state(&ln->sm, csio_lns_uninit);
csio_post_event_rns(ln, CSIO_RNFE_CLOSE);
break;
case CSIO_LNE_LOGO:
csio_set_state(&ln->sm, csio_lns_offline);
csio_post_event_rns(ln, CSIO_RNFE_DOWN);
break;
default:
csio_ln_dbg(ln,
"unexp ln event %d recv from did:x%x in "
"ln state[uninit].\n", evt, ln->nport_id);
CSIO_INC_STATS(ln, n_evt_unexp);
CSIO_DB_ASSERT(0);
break;
} /* switch event */
}
/*
* csio_lns_offline - The request in offline state.
* @ln - FCOE lnode.
* @evt - Event to be processed.
*
* Process the given lnode event which is currently in "offline" state.
* Invoked with HW lock held.
* Return - none.
*/
static void
csio_lns_offline(struct csio_lnode *ln, enum csio_ln_ev evt)
{
struct csio_hw *hw = csio_lnode_to_hw(ln);
struct csio_lnode *rln = hw->rln;
int rv;
CSIO_INC_STATS(ln, n_evt_sm[evt]);
switch (evt) {
case CSIO_LNE_LINKUP:
csio_set_state(&ln->sm, csio_lns_online);
/* Read FCF only for physical lnode */
if (csio_is_phys_ln(ln)) {
rv = csio_ln_read_fcf_entry(ln,
csio_ln_read_fcf_cbfn);
if (rv != 0) {
/* TODO: Send HW RESET event */
CSIO_INC_STATS(ln, n_err);
break;
}
/* Add FCF record */
list_add_tail(&ln->fcfinfo->list, &rln->fcf_lsthead);
}
rv = csio_ln_vnp_read(ln, csio_ln_vnp_read_cbfn);
if (rv != 0) {
/* TODO: Send HW RESET event */
CSIO_INC_STATS(ln, n_err);
}
break;
case CSIO_LNE_LINK_DOWN:
case CSIO_LNE_DOWN_LINK:
case CSIO_LNE_LOGO:
csio_ln_dbg(ln,
"ignoring event %d recv from did x%x"
"in ln state[offline].\n", evt, ln->nport_id);
CSIO_INC_STATS(ln, n_evt_drop);
break;
case CSIO_LNE_CLOSE:
csio_set_state(&ln->sm, csio_lns_uninit);
csio_post_event_rns(ln, CSIO_RNFE_CLOSE);
break;
default:
csio_ln_dbg(ln,
"unexp ln event %d recv from did:x%x in "
"ln state[offline]\n", evt, ln->nport_id);
CSIO_INC_STATS(ln, n_evt_unexp);
CSIO_DB_ASSERT(0);
break;
} /* switch event */
}
/*****************************************************************************/
/* END: Lnode SM */
/*****************************************************************************/
static void
csio_free_fcfinfo(struct kref *kref)
{
struct csio_fcf_info *fcfinfo = container_of(kref,
struct csio_fcf_info, kref);
kfree(fcfinfo);
}
/* Helper routines for attributes */
/*
* csio_lnode_state_to_str - Get current state of FCOE lnode.
* @ln - lnode
* @str - state of lnode.
*
*/
void
csio_lnode_state_to_str(struct csio_lnode *ln, int8_t *str)
{
if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_uninit)) {
strcpy(str, "UNINIT");
return;
}
if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_ready)) {
strcpy(str, "READY");
return;
}
if (csio_get_state(ln) == ((csio_sm_state_t)csio_lns_offline)) {
strcpy(str, "OFFLINE");
return;
}
strcpy(str, "UNKNOWN");
} /* csio_lnode_state_to_str */
int
csio_get_phy_port_stats(struct csio_hw *hw, uint8_t portid,
struct fw_fcoe_port_stats *port_stats)
{
struct csio_mb *mbp;
struct fw_fcoe_port_cmd_params portparams;
enum fw_retval retval;
int idx;
mbp = mempool_alloc(hw->mb_mempool, GFP_ATOMIC);
if (!mbp) {
csio_err(hw, "FCoE FCF PARAMS command out of memory!\n");
return -EINVAL;
}
portparams.portid = portid;
for (idx = 1; idx <= 3; idx++) {
portparams.idx = (idx-1)*6 + 1;
portparams.nstats = 6;
if (idx == 3)
portparams.nstats = 4;
csio_fcoe_read_portparams_init_mb(hw, mbp, CSIO_MB_DEFAULT_TMO,
&portparams, NULL);
if (csio_mb_issue(hw, mbp)) {
csio_err(hw, "Issue of FCoE port params failed!\n");
mempool_free(mbp, hw->mb_mempool);
return -EINVAL;
}
csio_mb_process_portparams_rsp(hw, mbp, &retval,
&portparams, port_stats);
}
mempool_free(mbp, hw->mb_mempool);
return 0;
}
/*
* csio_ln_mgmt_wr_handler -Mgmt Work Request handler.
* @wr - WR.
* @len - WR len.
* This handler is invoked when an outstanding mgmt WR is completed.
* Its invoked in the context of FW event worker thread for every
* mgmt event received.
* Return - none.
*/
static void
csio_ln_mgmt_wr_handler(struct csio_hw *hw, void *wr, uint32_t len)
{
struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
struct csio_ioreq *io_req = NULL;
struct fw_fcoe_els_ct_wr *wr_cmd;
wr_cmd = (struct fw_fcoe_els_ct_wr *) wr;
if (len < sizeof(struct fw_fcoe_els_ct_wr)) {
csio_err(mgmtm->hw,
"Invalid ELS CT WR length recvd, len:%x\n", len);
mgmtm->stats.n_err++;
return;
}
io_req = (struct csio_ioreq *) ((uintptr_t) wr_cmd->cookie);
io_req->wr_status = csio_wr_status(wr_cmd);
/* lookup ioreq exists in our active Q */
spin_lock_irq(&hw->lock);
if (csio_mgmt_req_lookup(mgmtm, io_req) != 0) {
csio_err(mgmtm->hw,
"Error- Invalid IO handle recv in WR. handle: %p\n",
io_req);
mgmtm->stats.n_err++;
spin_unlock_irq(&hw->lock);
return;
}
mgmtm = csio_hw_to_mgmtm(hw);
/* Dequeue from active queue */
list_del_init(&io_req->sm.sm_list);
mgmtm->stats.n_active--;
spin_unlock_irq(&hw->lock);
/* io_req will be freed by completion handler */
if (io_req->io_cbfn)
io_req->io_cbfn(hw, io_req);
}
/**
* csio_fcoe_fwevt_handler - Event handler for Firmware FCoE events.
* @hw: HW module
* @cpl_op: CPL opcode
* @cmd: FW cmd/WR.
*
* Process received FCoE cmd/WR event from FW.
*/
void
csio_fcoe_fwevt_handler(struct csio_hw *hw, __u8 cpl_op, __be64 *cmd)
{
struct csio_lnode *ln;
struct csio_rnode *rn;
uint8_t portid, opcode = *(uint8_t *)cmd;
struct fw_fcoe_link_cmd *lcmd;
struct fw_wr_hdr *wr;
struct fw_rdev_wr *rdev_wr;
enum fw_fcoe_link_status lstatus;
uint32_t fcfi, rdev_flowid, vnpi;
enum csio_ln_ev evt;
if (cpl_op == CPL_FW6_MSG && opcode == FW_FCOE_LINK_CMD) {
lcmd = (struct fw_fcoe_link_cmd *)cmd;
lstatus = lcmd->lstatus;
portid = FW_FCOE_LINK_CMD_PORTID_GET(
ntohl(lcmd->op_to_portid));
fcfi = FW_FCOE_LINK_CMD_FCFI_GET(ntohl(lcmd->sub_opcode_fcfi));
vnpi = FW_FCOE_LINK_CMD_VNPI_GET(ntohl(lcmd->vnpi_pkd));
if (lstatus == FCOE_LINKUP) {
/* HW lock here */
spin_lock_irq(&hw->lock);
csio_handle_link_up(hw, portid, fcfi, vnpi);
spin_unlock_irq(&hw->lock);
/* HW un lock here */
} else if (lstatus == FCOE_LINKDOWN) {
/* HW lock here */
spin_lock_irq(&hw->lock);
csio_handle_link_down(hw, portid, fcfi, vnpi);
spin_unlock_irq(&hw->lock);
/* HW un lock here */
} else {
csio_warn(hw, "Unexpected FCOE LINK status:0x%x\n",
lcmd->lstatus);
CSIO_INC_STATS(hw, n_cpl_unexp);
}
} else if (cpl_op == CPL_FW6_PLD) {
wr = (struct fw_wr_hdr *) (cmd + 4);
if (FW_WR_OP_G(be32_to_cpu(wr->hi))
== FW_RDEV_WR) {
rdev_wr = (struct fw_rdev_wr *) (cmd + 4);
rdev_flowid = FW_RDEV_WR_FLOWID_GET(
ntohl(rdev_wr->alloc_to_len16));
vnpi = FW_RDEV_WR_ASSOC_FLOWID_GET(
ntohl(rdev_wr->flags_to_assoc_flowid));
csio_dbg(hw,
"FW_RDEV_WR: flowid:x%x ev_cause:x%x "
"vnpi:0x%x\n", rdev_flowid,
rdev_wr->event_cause, vnpi);
if (rdev_wr->protocol != PROT_FCOE) {
csio_err(hw,
"FW_RDEV_WR: invalid proto:x%x "
"received with flowid:x%x\n",
rdev_wr->protocol,
rdev_flowid);
CSIO_INC_STATS(hw, n_evt_drop);
return;
}
/* HW lock here */
spin_lock_irq(&hw->lock);
ln = csio_ln_lookup_by_vnpi(hw, vnpi);
if (!ln) {
csio_err(hw,
"FW_DEV_WR: invalid vnpi:x%x received "
"with flowid:x%x\n", vnpi, rdev_flowid);
CSIO_INC_STATS(hw, n_evt_drop);
goto out_pld;
}
rn = csio_confirm_rnode(ln, rdev_flowid,
&rdev_wr->u.fcoe_rdev);
if (!rn) {
csio_ln_dbg(ln,
"Failed to confirm rnode "
"for flowid:x%x\n", rdev_flowid);
CSIO_INC_STATS(hw, n_evt_drop);
goto out_pld;
}
/* save previous event for debugging */
ln->prev_evt = ln->cur_evt;
ln->cur_evt = rdev_wr->event_cause;
CSIO_INC_STATS(ln, n_evt_fw[rdev_wr->event_cause]);
/* Translate all the fabric events to lnode SM events */
evt = CSIO_FWE_TO_LNE(rdev_wr->event_cause);
if (evt) {
csio_ln_dbg(ln,
"Posting event to lnode event:%d "
"cause:%d flowid:x%x\n", evt,
rdev_wr->event_cause, rdev_flowid);
csio_post_event(&ln->sm, evt);
}
/* Handover event to rn SM here. */
csio_rnode_fwevt_handler(rn, rdev_wr->event_cause);
out_pld:
spin_unlock_irq(&hw->lock);
return;
} else {
csio_warn(hw, "unexpected WR op(0x%x) recv\n",
FW_WR_OP_G(be32_to_cpu((wr->hi))));
CSIO_INC_STATS(hw, n_cpl_unexp);
}
} else if (cpl_op == CPL_FW6_MSG) {
wr = (struct fw_wr_hdr *) (cmd);
if (FW_WR_OP_G(be32_to_cpu(wr->hi)) == FW_FCOE_ELS_CT_WR) {
csio_ln_mgmt_wr_handler(hw, wr,
sizeof(struct fw_fcoe_els_ct_wr));
} else {
csio_warn(hw, "unexpected WR op(0x%x) recv\n",
FW_WR_OP_G(be32_to_cpu((wr->hi))));
CSIO_INC_STATS(hw, n_cpl_unexp);
}
} else {
csio_warn(hw, "unexpected CPL op(0x%x) recv\n", opcode);
CSIO_INC_STATS(hw, n_cpl_unexp);
}
}
/**
* csio_lnode_start - Kickstart lnode discovery.
* @ln: lnode
*
* This routine kickstarts the discovery by issuing an FCOE_LINK (up) command.
*/
int
csio_lnode_start(struct csio_lnode *ln)
{
int rv = 0;
if (csio_is_phys_ln(ln) && !(ln->flags & CSIO_LNF_LINK_ENABLE)) {
rv = csio_fcoe_enable_link(ln, 1);
ln->flags |= CSIO_LNF_LINK_ENABLE;
}
return rv;
}
/**
* csio_lnode_stop - Stop the lnode.
* @ln: lnode
*
* This routine is invoked by HW module to stop lnode and its associated NPIV
* lnodes.
*/
void
csio_lnode_stop(struct csio_lnode *ln)
{
csio_post_event_lns(ln, CSIO_LNE_DOWN_LINK);
if (csio_is_phys_ln(ln) && (ln->flags & CSIO_LNF_LINK_ENABLE)) {
csio_fcoe_enable_link(ln, 0);
ln->flags &= ~CSIO_LNF_LINK_ENABLE;
}
csio_ln_dbg(ln, "stopping ln :%p\n", ln);
}
/**
* csio_lnode_close - Close an lnode.
* @ln: lnode
*
* This routine is invoked by HW module to close an lnode and its
* associated NPIV lnodes. Lnode and its associated NPIV lnodes are
* set to uninitialized state.
*/
void
csio_lnode_close(struct csio_lnode *ln)
{
csio_post_event_lns(ln, CSIO_LNE_CLOSE);
if (csio_is_phys_ln(ln))
ln->vnp_flowid = CSIO_INVALID_IDX;
csio_ln_dbg(ln, "closed ln :%p\n", ln);
}
/*
* csio_ln_prep_ecwr - Prepare ELS/CT WR.
* @io_req - IO request.
* @wr_len - WR len
* @immd_len - WR immediate data
* @sub_op - Sub opcode
* @sid - source portid.
* @did - destination portid
* @flow_id - flowid
* @fw_wr - ELS/CT WR to be prepared.
* Returns: 0 - on success
*/
static int
csio_ln_prep_ecwr(struct csio_ioreq *io_req, uint32_t wr_len,
uint32_t immd_len, uint8_t sub_op, uint32_t sid,
uint32_t did, uint32_t flow_id, uint8_t *fw_wr)
{
struct fw_fcoe_els_ct_wr *wr;
__be32 port_id;
wr = (struct fw_fcoe_els_ct_wr *)fw_wr;
wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_FCOE_ELS_CT_WR) |
FW_FCOE_ELS_CT_WR_IMMDLEN(immd_len));
wr_len = DIV_ROUND_UP(wr_len, 16);
wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(flow_id) |
FW_WR_LEN16_V(wr_len));
wr->els_ct_type = sub_op;
wr->ctl_pri = 0;
wr->cp_en_class = 0;
wr->cookie = io_req->fw_handle;
wr->iqid = cpu_to_be16(csio_q_physiqid(
io_req->lnode->hwp, io_req->iq_idx));
wr->fl_to_sp = FW_FCOE_ELS_CT_WR_SP(1);
wr->tmo_val = (uint8_t) io_req->tmo;
port_id = htonl(sid);
memcpy(wr->l_id, PORT_ID_PTR(port_id), 3);
port_id = htonl(did);
memcpy(wr->r_id, PORT_ID_PTR(port_id), 3);
/* Prepare RSP SGL */
wr->rsp_dmalen = cpu_to_be32(io_req->dma_buf.len);
wr->rsp_dmaaddr = cpu_to_be64(io_req->dma_buf.paddr);
return 0;
}
/*
* csio_ln_mgmt_submit_wr - Post elsct work request.
* @mgmtm - mgmtm
* @io_req - io request.
* @sub_op - ELS or CT request type
* @pld - Dma Payload buffer
* @pld_len - Payload len
* Prepares ELSCT Work request and sents it to FW.
* Returns: 0 - on success
*/
static int
csio_ln_mgmt_submit_wr(struct csio_mgmtm *mgmtm, struct csio_ioreq *io_req,
uint8_t sub_op, struct csio_dma_buf *pld,
uint32_t pld_len)
{
struct csio_wr_pair wrp;
struct csio_lnode *ln = io_req->lnode;
struct csio_rnode *rn = io_req->rnode;
struct csio_hw *hw = mgmtm->hw;
uint8_t fw_wr[64];
struct ulptx_sgl dsgl;
uint32_t wr_size = 0;
uint8_t im_len = 0;
uint32_t wr_off = 0;
int ret = 0;
/* Calculate WR Size for this ELS REQ */
wr_size = sizeof(struct fw_fcoe_els_ct_wr);
/* Send as immediate data if pld < 256 */
if (pld_len < 256) {
wr_size += ALIGN(pld_len, 8);
im_len = (uint8_t)pld_len;
} else
wr_size += sizeof(struct ulptx_sgl);
/* Roundup WR size in units of 16 bytes */
wr_size = ALIGN(wr_size, 16);
/* Get WR to send ELS REQ */
ret = csio_wr_get(hw, mgmtm->eq_idx, wr_size, &wrp);
if (ret != 0) {
csio_err(hw, "Failed to get WR for ec_req %p ret:%d\n",
io_req, ret);
return ret;
}
/* Prepare Generic WR used by all ELS/CT cmd */
csio_ln_prep_ecwr(io_req, wr_size, im_len, sub_op,
ln->nport_id, rn->nport_id,
csio_rn_flowid(rn),
&fw_wr[0]);
/* Copy ELS/CT WR CMD */
csio_wr_copy_to_wrp(&fw_wr[0], &wrp, wr_off,
sizeof(struct fw_fcoe_els_ct_wr));
wr_off += sizeof(struct fw_fcoe_els_ct_wr);
/* Copy payload to Immediate section of WR */
if (im_len)
csio_wr_copy_to_wrp(pld->vaddr, &wrp, wr_off, im_len);
else {
/* Program DSGL to dma payload */
dsgl.cmd_nsge = htonl(ULPTX_CMD_V(ULP_TX_SC_DSGL) |
ULPTX_MORE_F | ULPTX_NSGE_V(1));
dsgl.len0 = cpu_to_be32(pld_len);
dsgl.addr0 = cpu_to_be64(pld->paddr);
csio_wr_copy_to_wrp(&dsgl, &wrp, ALIGN(wr_off, 8),
sizeof(struct ulptx_sgl));
}
/* Issue work request to xmit ELS/CT req to FW */
csio_wr_issue(mgmtm->hw, mgmtm->eq_idx, false);
return ret;
}
/*
* csio_ln_mgmt_submit_req - Submit FCOE Mgmt request.
* @io_req - IO Request
* @io_cbfn - Completion handler.
* @req_type - ELS or CT request type
* @pld - Dma Payload buffer
* @pld_len - Payload len
*
*
* This API used submit managment ELS/CT request.
* This called with hw lock held
* Returns: 0 - on success
* -ENOMEM - on error.
*/
static int
csio_ln_mgmt_submit_req(struct csio_ioreq *io_req,
void (*io_cbfn) (struct csio_hw *, struct csio_ioreq *),
enum fcoe_cmn_type req_type, struct csio_dma_buf *pld,
uint32_t pld_len)
{
struct csio_hw *hw = csio_lnode_to_hw(io_req->lnode);
struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
int rv;
BUG_ON(pld_len > pld->len);
io_req->io_cbfn = io_cbfn; /* Upper layer callback handler */
io_req->fw_handle = (uintptr_t) (io_req);
io_req->eq_idx = mgmtm->eq_idx;
io_req->iq_idx = mgmtm->iq_idx;
rv = csio_ln_mgmt_submit_wr(mgmtm, io_req, req_type, pld, pld_len);
if (rv == 0) {
list_add_tail(&io_req->sm.sm_list, &mgmtm->active_q);
mgmtm->stats.n_active++;
}
return rv;
}
/*
* csio_ln_fdmi_init - FDMI Init entry point.
* @ln: lnode
*/
static int
csio_ln_fdmi_init(struct csio_lnode *ln)
{
struct csio_hw *hw = csio_lnode_to_hw(ln);
struct csio_dma_buf *dma_buf;
/* Allocate MGMT request required for FDMI */
ln->mgmt_req = kzalloc(sizeof(struct csio_ioreq), GFP_KERNEL);
if (!ln->mgmt_req) {
csio_ln_err(ln, "Failed to alloc ioreq for FDMI\n");
CSIO_INC_STATS(hw, n_err_nomem);
return -ENOMEM;
}
/* Allocate Dma buffers for FDMI response Payload */
dma_buf = &ln->mgmt_req->dma_buf;
dma_buf->len = 2048;
dma_buf->vaddr = pci_alloc_consistent(hw->pdev, dma_buf->len,
&dma_buf->paddr);
if (!dma_buf->vaddr) {
csio_err(hw, "Failed to alloc DMA buffer for FDMI!\n");
kfree(ln->mgmt_req);
ln->mgmt_req = NULL;
return -ENOMEM;
}
ln->flags |= CSIO_LNF_FDMI_ENABLE;
return 0;
}
/*
* csio_ln_fdmi_exit - FDMI exit entry point.
* @ln: lnode
*/
static int
csio_ln_fdmi_exit(struct csio_lnode *ln)
{
struct csio_dma_buf *dma_buf;
struct csio_hw *hw = csio_lnode_to_hw(ln);
if (!ln->mgmt_req)
return 0;
dma_buf = &ln->mgmt_req->dma_buf;
if (dma_buf->vaddr)
pci_free_consistent(hw->pdev, dma_buf->len, dma_buf->vaddr,
dma_buf->paddr);
kfree(ln->mgmt_req);
return 0;
}
int
csio_scan_done(struct csio_lnode *ln, unsigned long ticks,
unsigned long time, unsigned long max_scan_ticks,
unsigned long delta_scan_ticks)
{
int rv = 0;
if (time >= max_scan_ticks)
return 1;
if (!ln->tgt_scan_tick)
ln->tgt_scan_tick = ticks;
if (((ticks - ln->tgt_scan_tick) >= delta_scan_ticks)) {
if (!ln->last_scan_ntgts)
ln->last_scan_ntgts = ln->n_scsi_tgts;
else {
if (ln->last_scan_ntgts == ln->n_scsi_tgts)
return 1;
ln->last_scan_ntgts = ln->n_scsi_tgts;
}
ln->tgt_scan_tick = ticks;
}
return rv;
}
/*
* csio_notify_lnodes:
* @hw: HW module
* @note: Notification
*
* Called from the HW SM to fan out notifications to the
* Lnode SM. Since the HW SM is entered with lock held,
* there is no need to hold locks here.
*
*/
void
csio_notify_lnodes(struct csio_hw *hw, enum csio_ln_notify note)
{
struct list_head *tmp;
struct csio_lnode *ln;
csio_dbg(hw, "Notifying all nodes of event %d\n", note);
/* Traverse children lnodes list and send evt */
list_for_each(tmp, &hw->sln_head) {
ln = (struct csio_lnode *) tmp;
switch (note) {
case CSIO_LN_NOTIFY_HWREADY:
csio_lnode_start(ln);
break;
case CSIO_LN_NOTIFY_HWRESET:
case CSIO_LN_NOTIFY_HWREMOVE:
csio_lnode_close(ln);
break;
case CSIO_LN_NOTIFY_HWSTOP:
csio_lnode_stop(ln);
break;
default:
break;
}
}
}
/*
* csio_disable_lnodes:
* @hw: HW module
* @portid:port id
* @disable: disable/enable flag.
* If disable=1, disables all lnode hosted on given physical port.
* otherwise enables all the lnodes on given phsysical port.
* This routine need to called with hw lock held.
*/
void
csio_disable_lnodes(struct csio_hw *hw, uint8_t portid, bool disable)
{
struct list_head *tmp;
struct csio_lnode *ln;
csio_dbg(hw, "Notifying event to all nodes of port:%d\n", portid);
/* Traverse sibling lnodes list and send evt */
list_for_each(tmp, &hw->sln_head) {
ln = (struct csio_lnode *) tmp;
if (ln->portid != portid)
continue;
if (disable)
csio_lnode_stop(ln);
else
csio_lnode_start(ln);
}
}
/*
* csio_ln_init - Initialize an lnode.
* @ln: lnode
*
*/
static int
csio_ln_init(struct csio_lnode *ln)
{
int rv = -EINVAL;
struct csio_lnode *rln, *pln;
struct csio_hw *hw = csio_lnode_to_hw(ln);
csio_init_state(&ln->sm, csio_lns_uninit);
ln->vnp_flowid = CSIO_INVALID_IDX;
ln->fcf_flowid = CSIO_INVALID_IDX;
if (csio_is_root_ln(ln)) {
/* This is the lnode used during initialization */
ln->fcfinfo = kzalloc(sizeof(struct csio_fcf_info), GFP_KERNEL);
if (!ln->fcfinfo) {
csio_ln_err(ln, "Failed to alloc FCF record\n");
CSIO_INC_STATS(hw, n_err_nomem);
goto err;
}
INIT_LIST_HEAD(&ln->fcf_lsthead);
kref_init(&ln->fcfinfo->kref);
if (csio_fdmi_enable && csio_ln_fdmi_init(ln))
goto err;
} else { /* Either a non-root physical or a virtual lnode */
/*
* THe rest is common for non-root physical and NPIV lnodes.
* Just get references to all other modules
*/
rln = csio_root_lnode(ln);
if (csio_is_npiv_ln(ln)) {
/* NPIV */
pln = csio_parent_lnode(ln);
kref_get(&pln->fcfinfo->kref);
ln->fcfinfo = pln->fcfinfo;
} else {
/* Another non-root physical lnode (FCF) */
ln->fcfinfo = kzalloc(sizeof(struct csio_fcf_info),
GFP_KERNEL);
if (!ln->fcfinfo) {
csio_ln_err(ln, "Failed to alloc FCF info\n");
CSIO_INC_STATS(hw, n_err_nomem);
goto err;
}
kref_init(&ln->fcfinfo->kref);
if (csio_fdmi_enable && csio_ln_fdmi_init(ln))
goto err;
}
} /* if (!csio_is_root_ln(ln)) */
return 0;
err:
return rv;
}
static void
csio_ln_exit(struct csio_lnode *ln)
{
struct csio_lnode *pln;
csio_cleanup_rns(ln);
if (csio_is_npiv_ln(ln)) {
pln = csio_parent_lnode(ln);
kref_put(&pln->fcfinfo->kref, csio_free_fcfinfo);
} else {
kref_put(&ln->fcfinfo->kref, csio_free_fcfinfo);
if (csio_fdmi_enable)
csio_ln_fdmi_exit(ln);
}
ln->fcfinfo = NULL;
}
/**
* csio_lnode_init - Initialize the members of an lnode.
* @ln: lnode
*
*/
int
csio_lnode_init(struct csio_lnode *ln, struct csio_hw *hw,
struct csio_lnode *pln)
{
int rv = -EINVAL;
/* Link this lnode to hw */
csio_lnode_to_hw(ln) = hw;
/* Link child to parent if child lnode */
if (pln)
ln->pln = pln;
else
ln->pln = NULL;
/* Initialize scsi_tgt and timers to zero */
ln->n_scsi_tgts = 0;
ln->last_scan_ntgts = 0;
ln->tgt_scan_tick = 0;
/* Initialize rnode list */
INIT_LIST_HEAD(&ln->rnhead);
INIT_LIST_HEAD(&ln->cln_head);
/* Initialize log level for debug */
ln->params.log_level = hw->params.log_level;
if (csio_ln_init(ln))
goto err;
/* Add lnode to list of sibling or children lnodes */
spin_lock_irq(&hw->lock);
list_add_tail(&ln->sm.sm_list, pln ? &pln->cln_head : &hw->sln_head);
if (pln)
pln->num_vports++;
spin_unlock_irq(&hw->lock);
hw->num_lns++;
return 0;
err:
csio_lnode_to_hw(ln) = NULL;
return rv;
}
/**
* csio_lnode_exit - De-instantiate an lnode.
* @ln: lnode
*
*/
void
csio_lnode_exit(struct csio_lnode *ln)
{
struct csio_hw *hw = csio_lnode_to_hw(ln);
csio_ln_exit(ln);
/* Remove this lnode from hw->sln_head */
spin_lock_irq(&hw->lock);
list_del_init(&ln->sm.sm_list);
/* If it is children lnode, decrement the
* counter in its parent lnode
*/
if (ln->pln)
ln->pln->num_vports--;
/* Update root lnode pointer */
if (list_empty(&hw->sln_head))
hw->rln = NULL;
else
hw->rln = (struct csio_lnode *)csio_list_next(&hw->sln_head);
spin_unlock_irq(&hw->lock);
csio_lnode_to_hw(ln) = NULL;
hw->num_lns--;
}
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