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linux_dsm_epyc7002/drivers/scsi/csiostor/csio_lnode.c
Kees Cook 42c335f7e6 scsi: csiostor: Avoid content leaks and casts 
When copying attributes, the len argument was padded out and the
resulting memcpy() would copy beyond the end of the source buffer.
Avoid this, and use size_t for val_len to avoid all the casts.
Similarly, avoid source buffer casts and use void *.

Additionally enforces val_len can be represented by u16 and that the DMA
buffer was not overflowed. Fixes the size of mfa, which is not
FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN (but it will be padded up to 4). This
was noticed by the future CONFIG_FORTIFY_SOURCE checks.

Cc: Daniel Micay <danielmicay@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-12 20:48:05 -04:00

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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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