// SPDX-License-Identifier: GPL-2.0-only
/*
* This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
* Host Bus Adapters. Refer to the README file included with this package
* for driver version and adapter compatibility.
*
* Copyright (c) 2018 Broadcom. All Rights Reserved.
* The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
*
* Contact Information:
* [email protected]
*/
#include <scsi/libiscsi.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_netlink.h>
#include <net/netlink.h>
#include <scsi/scsi.h>
#include "be_iscsi.h"
extern struct iscsi_transport beiscsi_iscsi_transport;
/**
* beiscsi_session_create - creates a new iscsi session
* @ep: pointer to iscsi ep
* @cmds_max: max commands supported
* @qdepth: max queue depth supported
* @initial_cmdsn: initial iscsi CMDSN
*/
struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
u16 cmds_max,
u16 qdepth,
u32 initial_cmdsn)
{
struct Scsi_Host *shost;
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_cls_session *cls_session;
struct beiscsi_hba *phba;
struct iscsi_session *sess;
struct beiscsi_session *beiscsi_sess;
struct beiscsi_io_task *io_task;
if (!ep) {
pr_err("beiscsi_session_create: invalid ep\n");
return NULL;
}
beiscsi_ep = ep->dd_data;
phba = beiscsi_ep->phba;
if (!beiscsi_hba_is_online(phba)) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
return NULL;
}
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_session_create\n");
if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Cannot handle %d cmds."
"Max cmds per session supported is %d. Using %d."
"\n", cmds_max,
beiscsi_ep->phba->params.wrbs_per_cxn,
beiscsi_ep->phba->params.wrbs_per_cxn);
cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
}
shost = phba->shost;
cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
shost, cmds_max,
sizeof(*beiscsi_sess),
sizeof(*io_task),
initial_cmdsn, ISCSI_MAX_TARGET);
if (!cls_session)
return NULL;
sess = cls_session->dd_data;
beiscsi_sess = sess->dd_data;
beiscsi_sess->bhs_pool = dma_pool_create("beiscsi_bhs_pool",
&phba->pcidev->dev,
sizeof(struct be_cmd_bhs),
64, 0);
if (!beiscsi_sess->bhs_pool)
goto destroy_sess;
return cls_session;
destroy_sess:
iscsi_session_teardown(cls_session);
return NULL;
}
/**
* beiscsi_session_destroy - destroys iscsi session
* @cls_session: pointer to iscsi cls session
*
* Destroys iSCSI session instance and releases
* resources allocated for it.
*/
void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *sess = cls_session->dd_data;
struct beiscsi_session *beiscsi_sess = sess->dd_data;
printk(KERN_INFO "In beiscsi_session_destroy\n");
dma_pool_destroy(beiscsi_sess->bhs_pool);
iscsi_session_teardown(cls_session);
}
/**
* beiscsi_session_fail(): Closing session with appropriate error
* @cls_session: ptr to session
**/
void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
{
iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
}
/**
* beiscsi_conn_create - create an instance of iscsi connection
* @cls_session: ptr to iscsi_cls_session
* @cid: iscsi cid
*/
struct iscsi_cls_conn *
beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
{
struct beiscsi_hba *phba;
struct Scsi_Host *shost;
struct iscsi_cls_conn *cls_conn;
struct beiscsi_conn *beiscsi_conn;
struct iscsi_conn *conn;
struct iscsi_session *sess;
struct beiscsi_session *beiscsi_sess;
shost = iscsi_session_to_shost(cls_session);
phba = iscsi_host_priv(shost);
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_conn_create ,cid"
"from iscsi layer=%d\n", cid);
cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
beiscsi_conn = conn->dd_data;
beiscsi_conn->ep = NULL;
beiscsi_conn->phba = phba;
beiscsi_conn->conn = conn;
sess = cls_session->dd_data;
beiscsi_sess = sess->dd_data;
beiscsi_conn->beiscsi_sess = beiscsi_sess;
return cls_conn;
}
/**
* beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
* @cls_session: pointer to iscsi cls session
* @cls_conn: pointer to iscsi cls conn
* @transport_fd: EP handle(64 bit)
* @is_leading: indicate if this is the session leading connection (MCS)
*
* This function binds the TCP Conn with iSCSI Connection and Session.
*/
int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn,
u64 transport_fd, int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct beiscsi_conn *beiscsi_conn = conn->dd_data;
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
struct hwi_wrb_context *pwrb_context;
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_endpoint *ep;
uint16_t cri_index;
int rc = 0;
ep = iscsi_lookup_endpoint(transport_fd);
if (!ep)
return -EINVAL;
beiscsi_ep = ep->dd_data;
if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
rc = -EINVAL;
goto put_ep;
}
if (beiscsi_ep->phba != phba) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
beiscsi_ep->phba, phba);
rc = -EEXIST;
goto put_ep;
}
cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
if (phba->conn_table[cri_index]) {
if (beiscsi_conn != phba->conn_table[cri_index] ||
beiscsi_ep != phba->conn_table[cri_index]->ep) {
__beiscsi_log(phba, KERN_ERR,
"BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
cri_index,
beiscsi_ep->ep_cid,
beiscsi_conn,
phba->conn_table[cri_index]);
rc = -EINVAL;
goto put_ep;
}
}
beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
beiscsi_conn->ep = beiscsi_ep;
beiscsi_ep->conn = beiscsi_conn;
/**
* Each connection is associated with a WRBQ kept in wrb_context.
* Store doorbell offset for transmit path.
*/
pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : cid %d phba->conn_table[%u]=%p\n",
beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
phba->conn_table[cri_index] = beiscsi_conn;
put_ep:
iscsi_put_endpoint(ep);
return rc;
}
static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
{
if (phba->ipv4_iface)
return 0;
phba->ipv4_iface = iscsi_create_iface(phba->shost,
&beiscsi_iscsi_transport,
ISCSI_IFACE_TYPE_IPV4,
0, 0);
if (!phba->ipv4_iface) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Could not "
"create default IPv4 address.\n");
return -ENODEV;
}
return 0;
}
static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
{
if (phba->ipv6_iface)
return 0;
phba->ipv6_iface = iscsi_create_iface(phba->shost,
&beiscsi_iscsi_transport,
ISCSI_IFACE_TYPE_IPV6,
0, 0);
if (!phba->ipv6_iface) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Could not "
"create default IPv6 address.\n");
return -ENODEV;
}
return 0;
}
void beiscsi_iface_create_default(struct beiscsi_hba *phba)
{
struct be_cmd_get_if_info_resp *if_info;
if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
beiscsi_iface_create_ipv4(phba);
kfree(if_info);
}
if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
beiscsi_iface_create_ipv6(phba);
kfree(if_info);
}
}
void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
{
if (phba->ipv6_iface) {
iscsi_destroy_iface(phba->ipv6_iface);
phba->ipv6_iface = NULL;
}
if (phba->ipv4_iface) {
iscsi_destroy_iface(phba->ipv4_iface);
phba->ipv4_iface = NULL;
}
}
/**
* beiscsi_iface_config_vlan()- Set the VLAN TAG
* @shost: Scsi Host for the driver instance
* @iface_param: Interface paramters
*
* Set the VLAN TAG for the adapter or disable
* the VLAN config
*
* returns
* Success: 0
* Failure: Non-Zero Value
**/
static int
beiscsi_iface_config_vlan(struct Scsi_Host *shost,
struct iscsi_iface_param_info *iface_param)
{
struct beiscsi_hba *phba = iscsi_host_priv(shost);
int ret = -EPERM;
switch (iface_param->param) {
case ISCSI_NET_PARAM_VLAN_ENABLED:
ret = 0;
if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
break;
case ISCSI_NET_PARAM_VLAN_TAG:
ret = beiscsi_if_set_vlan(phba,
*((uint16_t *)iface_param->value));
break;
}
return ret;
}
static int
beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
struct iscsi_iface_param_info *info,
void *data, uint32_t dt_len)
{
struct beiscsi_hba *phba = iscsi_host_priv(shost);
u8 *ip = NULL, *subnet = NULL, *gw;
struct nlattr *nla;
int ret = -EPERM;
/* Check the param */
switch (info->param) {
case ISCSI_NET_PARAM_IFACE_ENABLE:
if (info->value[0] == ISCSI_IFACE_ENABLE)
ret = beiscsi_iface_create_ipv4(phba);
else {
iscsi_destroy_iface(phba->ipv4_iface);
phba->ipv4_iface = NULL;
}
break;
case ISCSI_NET_PARAM_IPV4_GW:
gw = info->value;
ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
break;
case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
/* release DHCP IP address */
ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
NULL, NULL);
else
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Invalid BOOTPROTO: %d\n",
info->value[0]);
break;
case ISCSI_NET_PARAM_IPV4_ADDR:
ip = info->value;
nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
if (nla) {
info = nla_data(nla);
subnet = info->value;
}
ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
ip, subnet);
break;
case ISCSI_NET_PARAM_IPV4_SUBNET:
/*
* OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
* and subnet both. Find IP to be applied for this subnet.
*/
subnet = info->value;
nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
if (nla) {
info = nla_data(nla);
ip = info->value;
}
ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
ip, subnet);
break;
}
return ret;
}
static int
beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
struct iscsi_iface_param_info *iface_param,
void *data, uint32_t dt_len)
{
struct beiscsi_hba *phba = iscsi_host_priv(shost);
int ret = -EPERM;
switch (iface_param->param) {
case ISCSI_NET_PARAM_IFACE_ENABLE:
if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
ret = beiscsi_iface_create_ipv6(phba);
else {
iscsi_destroy_iface(phba->ipv6_iface);
phba->ipv6_iface = NULL;
}
break;
case ISCSI_NET_PARAM_IPV6_ADDR:
ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
iface_param->value, NULL);
break;
}
return ret;
}
int beiscsi_iface_set_param(struct Scsi_Host *shost,
void *data, uint32_t dt_len)
{
struct iscsi_iface_param_info *iface_param = NULL;
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct nlattr *attrib;
uint32_t rm_len = dt_len;
int ret;
if (!beiscsi_hba_is_online(phba)) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
return -EBUSY;
}
/* update interface_handle */
ret = beiscsi_if_get_handle(phba);
if (ret) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Getting Interface Handle Failed\n");
return ret;
}
nla_for_each_attr(attrib, data, dt_len, rm_len) {
/* ignore nla_type as it is never used */
if (nla_len(attrib) < sizeof(*iface_param))
return -EINVAL;
iface_param = nla_data(attrib);
if (iface_param->param_type != ISCSI_NET_PARAM)
continue;
/*
* BE2ISCSI only supports 1 interface
*/
if (iface_param->iface_num) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Invalid iface_num %d."
"Only iface_num 0 is supported.\n",
iface_param->iface_num);
return -EINVAL;
}
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : %s.0 set param %d",
(iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
"ipv4" : "ipv6", iface_param->param);
ret = -EPERM;
switch (iface_param->param) {
case ISCSI_NET_PARAM_VLAN_ENABLED:
case ISCSI_NET_PARAM_VLAN_TAG:
ret = beiscsi_iface_config_vlan(shost, iface_param);
break;
default:
switch (iface_param->iface_type) {
case ISCSI_IFACE_TYPE_IPV4:
ret = beiscsi_iface_config_ipv4(shost,
iface_param,
data, dt_len);
break;
case ISCSI_IFACE_TYPE_IPV6:
ret = beiscsi_iface_config_ipv6(shost,
iface_param,
data, dt_len);
break;
}
}
if (ret == -EPERM) {
__beiscsi_log(phba, KERN_ERR,
"BS_%d : %s.0 set param %d not permitted",
(iface_param->iface_type ==
ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
iface_param->param);
ret = 0;
}
if (ret)
break;
}
return ret;
}
static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
struct iscsi_iface *iface,
int param, char *buf)
{
struct be_cmd_get_if_info_resp *if_info;
int len, ip_type = BEISCSI_IP_TYPE_V4;
if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
ip_type = BEISCSI_IP_TYPE_V6;
len = beiscsi_if_get_info(phba, ip_type, &if_info);
if (len)
return len;
switch (param) {
case ISCSI_NET_PARAM_IPV4_ADDR:
len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
break;
case ISCSI_NET_PARAM_IPV6_ADDR:
len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
break;
case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
if (!if_info->dhcp_state)
len = sprintf(buf, "static\n");
else
len = sprintf(buf, "dhcp\n");
break;
case ISCSI_NET_PARAM_IPV4_SUBNET:
len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
break;
case ISCSI_NET_PARAM_VLAN_ENABLED:
len = sprintf(buf, "%s\n",
(if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
"disable" : "enable");
break;
case ISCSI_NET_PARAM_VLAN_ID:
if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
len = -EINVAL;
else
len = sprintf(buf, "%d\n",
(if_info->vlan_priority &
ISCSI_MAX_VLAN_ID));
break;
case ISCSI_NET_PARAM_VLAN_PRIORITY:
if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
len = -EINVAL;
else
len = sprintf(buf, "%d\n",
((if_info->vlan_priority >> 13) &
ISCSI_MAX_VLAN_PRIORITY));
break;
default:
WARN_ON(1);
}
kfree(if_info);
return len;
}
int beiscsi_iface_get_param(struct iscsi_iface *iface,
enum iscsi_param_type param_type,
int param, char *buf)
{
struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct be_cmd_get_def_gateway_resp gateway;
int len = -EPERM;
if (param_type != ISCSI_NET_PARAM)
return 0;
if (!beiscsi_hba_is_online(phba)) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
return -EBUSY;
}
switch (param) {
case ISCSI_NET_PARAM_IPV4_ADDR:
case ISCSI_NET_PARAM_IPV4_SUBNET:
case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
case ISCSI_NET_PARAM_IPV6_ADDR:
case ISCSI_NET_PARAM_VLAN_ENABLED:
case ISCSI_NET_PARAM_VLAN_ID:
case ISCSI_NET_PARAM_VLAN_PRIORITY:
len = __beiscsi_iface_get_param(phba, iface, param, buf);
break;
case ISCSI_NET_PARAM_IFACE_ENABLE:
if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
len = sprintf(buf, "%s\n",
phba->ipv4_iface ? "enable" : "disable");
else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
len = sprintf(buf, "%s\n",
phba->ipv6_iface ? "enable" : "disable");
break;
case ISCSI_NET_PARAM_IPV4_GW:
memset(&gateway, 0, sizeof(gateway));
len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
if (!len)
len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
break;
}
return len;
}
/**
* beiscsi_ep_get_param - get the iscsi parameter
* @ep: pointer to iscsi ep
* @param: parameter type identifier
* @buf: buffer pointer
*
* returns iscsi parameter
*/
int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
enum iscsi_param param, char *buf)
{
struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
int len;
beiscsi_log(beiscsi_ep->phba, KERN_INFO,
BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_ep_get_param,"
" param= %d\n", param);
switch (param) {
case ISCSI_PARAM_CONN_PORT:
len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
break;
case ISCSI_PARAM_CONN_ADDRESS:
if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
else
len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
break;
default:
len = -EPERM;
}
return len;
}
int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf, int buflen)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct beiscsi_hba *phba = NULL;
int ret;
phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_conn_set_param,"
" param= %d\n", param);
ret = iscsi_set_param(cls_conn, param, buf, buflen);
if (ret)
return ret;
/*
* If userspace tried to set the value to higher than we can
* support override here.
*/
switch (param) {
case ISCSI_PARAM_FIRST_BURST:
if (session->first_burst > 8192)
session->first_burst = 8192;
break;
case ISCSI_PARAM_MAX_RECV_DLENGTH:
if (conn->max_recv_dlength > 65536)
conn->max_recv_dlength = 65536;
break;
case ISCSI_PARAM_MAX_BURST:
if (session->max_burst > 262144)
session->max_burst = 262144;
break;
case ISCSI_PARAM_MAX_XMIT_DLENGTH:
if (conn->max_xmit_dlength > 65536)
conn->max_xmit_dlength = 65536;
fallthrough;
default:
return 0;
}
return 0;
}
/**
* beiscsi_get_port_state - Get the Port State
* @shost : pointer to scsi_host structure
*
*/
static void beiscsi_get_port_state(struct Scsi_Host *shost)
{
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct iscsi_cls_host *ihost = shost->shost_data;
ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
}
/**
* beiscsi_get_port_speed - Get the Port Speed from Adapter
* @shost : pointer to scsi_host structure
*
*/
static void beiscsi_get_port_speed(struct Scsi_Host *shost)
{
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct iscsi_cls_host *ihost = shost->shost_data;
switch (phba->port_speed) {
case BE2ISCSI_LINK_SPEED_10MBPS:
ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
break;
case BE2ISCSI_LINK_SPEED_100MBPS:
ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
break;
case BE2ISCSI_LINK_SPEED_1GBPS:
ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
break;
case BE2ISCSI_LINK_SPEED_10GBPS:
ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
break;
case BE2ISCSI_LINK_SPEED_25GBPS:
ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
break;
case BE2ISCSI_LINK_SPEED_40GBPS:
ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
break;
default:
ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
}
}
/**
* beiscsi_get_host_param - get the iscsi parameter
* @shost: pointer to scsi_host structure
* @param: parameter type identifier
* @buf: buffer pointer
*
*/
int beiscsi_get_host_param(struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf)
{
struct beiscsi_hba *phba = iscsi_host_priv(shost);
int status = 0;
if (!beiscsi_hba_is_online(phba)) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
return 0;
}
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_get_host_param, param = %d\n", param);
switch (param) {
case ISCSI_HOST_PARAM_HWADDRESS:
status = beiscsi_get_macaddr(buf, phba);
if (status < 0) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : beiscsi_get_macaddr Failed\n");
return 0;
}
break;
case ISCSI_HOST_PARAM_INITIATOR_NAME:
/* try fetching user configured name first */
status = beiscsi_get_initiator_name(phba, buf, true);
if (status < 0) {
status = beiscsi_get_initiator_name(phba, buf, false);
if (status < 0) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Retrieving Initiator Name Failed\n");
status = 0;
}
}
break;
case ISCSI_HOST_PARAM_PORT_STATE:
beiscsi_get_port_state(shost);
status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
break;
case ISCSI_HOST_PARAM_PORT_SPEED:
beiscsi_get_port_speed(shost);
status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
break;
default:
return iscsi_host_get_param(shost, param, buf);
}
return status;
}
int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
{
struct be_cmd_get_nic_conf_resp resp;
int rc;
if (phba->mac_addr_set)
return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
memset(&resp, 0, sizeof(resp));
rc = mgmt_get_nic_conf(phba, &resp);
if (rc)
return rc;
phba->mac_addr_set = true;
memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
}
/**
* beiscsi_conn_get_stats - get the iscsi stats
* @cls_conn: pointer to iscsi cls conn
* @stats: pointer to iscsi_stats structure
*
* returns iscsi stats
*/
void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
struct iscsi_stats *stats)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct beiscsi_hba *phba = NULL;
phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_conn_get_stats\n");
stats->txdata_octets = conn->txdata_octets;
stats->rxdata_octets = conn->rxdata_octets;
stats->dataout_pdus = conn->dataout_pdus_cnt;
stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
stats->datain_pdus = conn->datain_pdus_cnt;
stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
stats->r2t_pdus = conn->r2t_pdus_cnt;
stats->digest_err = 0;
stats->timeout_err = 0;
stats->custom_length = 1;
strcpy(stats->custom[0].desc, "eh_abort_cnt");
stats->custom[0].value = conn->eh_abort_cnt;
}
/**
* beiscsi_set_params_for_offld - get the parameters for offload
* @beiscsi_conn: pointer to beiscsi_conn
* @params: pointer to offload_params structure
*/
static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
struct beiscsi_offload_params *params)
{
struct iscsi_conn *conn = beiscsi_conn->conn;
struct iscsi_session *session = conn->session;
AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
params, session->max_burst);
AMAP_SET_BITS(struct amap_beiscsi_offload_params,
max_send_data_segment_length, params,
conn->max_xmit_dlength);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
params, session->first_burst);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
session->erl);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
conn->datadgst_en);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
conn->hdrdgst_en);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
session->initial_r2t_en);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
session->imm_data_en);
AMAP_SET_BITS(struct amap_beiscsi_offload_params,
data_seq_inorder, params,
session->dataseq_inorder_en);
AMAP_SET_BITS(struct amap_beiscsi_offload_params,
pdu_seq_inorder, params,
session->pdu_inorder_en);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
session->max_r2t);
AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
(conn->exp_statsn - 1));
AMAP_SET_BITS(struct amap_beiscsi_offload_params,
max_recv_data_segment_length, params,
conn->max_recv_dlength);
}
/**
* beiscsi_conn_start - offload of session to chip
* @cls_conn: pointer to beiscsi_conn
*/
int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct beiscsi_conn *beiscsi_conn = conn->dd_data;
struct beiscsi_endpoint *beiscsi_ep;
struct beiscsi_offload_params params;
struct beiscsi_hba *phba;
phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
if (!beiscsi_hba_is_online(phba)) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
return -EBUSY;
}
beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_conn_start\n");
memset(¶ms, 0, sizeof(struct beiscsi_offload_params));
beiscsi_ep = beiscsi_conn->ep;
if (!beiscsi_ep)
beiscsi_log(beiscsi_conn->phba, KERN_ERR,
BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
beiscsi_conn->login_in_progress = 0;
beiscsi_set_params_for_offld(beiscsi_conn, ¶ms);
beiscsi_offload_connection(beiscsi_conn, ¶ms);
iscsi_conn_start(cls_conn);
return 0;
}
/**
* beiscsi_get_cid - Allocate a cid
* @phba: The phba instance
*/
static int beiscsi_get_cid(struct beiscsi_hba *phba)
{
uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
unsigned short cid, cid_from_ulp;
struct ulp_cid_info *cid_info;
/* Find the ULP which has more CID available */
cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
BEISCSI_ULP0_AVLBL_CID(phba) : 0;
cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
BEISCSI_ULP1_AVLBL_CID(phba) : 0;
cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
BEISCSI_ULP0 : BEISCSI_ULP1;
/**
* If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
* is ZERO for both, ULP 1 is returned.
* Check if ULP is loaded before getting new CID.
*/
if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
return BE_INVALID_CID;
cid_info = phba->cid_array_info[cid_from_ulp];
cid = cid_info->cid_array[cid_info->cid_alloc];
if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
__beiscsi_log(phba, KERN_ERR,
"BS_%d : failed to get cid: available %u:%u\n",
cid_info->avlbl_cids, cid_info->cid_free);
return BE_INVALID_CID;
}
/* empty the slot */
cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
cid_info->cid_alloc = 0;
cid_info->avlbl_cids--;
return cid;
}
/**
* beiscsi_put_cid - Free the cid
* @phba: The phba for which the cid is being freed
* @cid: The cid to free
*/
static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
{
uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
struct hwi_wrb_context *pwrb_context;
struct hwi_controller *phwi_ctrlr;
struct ulp_cid_info *cid_info;
uint16_t cid_post_ulp;
phwi_ctrlr = phba->phwi_ctrlr;
pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
cid_post_ulp = pwrb_context->ulp_num;
cid_info = phba->cid_array_info[cid_post_ulp];
/* fill only in empty slot */
if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
__beiscsi_log(phba, KERN_ERR,
"BS_%d : failed to put cid %u: available %u:%u\n",
cid, cid_info->avlbl_cids, cid_info->cid_free);
return;
}
cid_info->cid_array[cid_info->cid_free++] = cid;
if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
cid_info->cid_free = 0;
cid_info->avlbl_cids++;
}
/**
* beiscsi_free_ep - free endpoint
* @beiscsi_ep: pointer to device endpoint struct
*/
static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
{
struct beiscsi_hba *phba = beiscsi_ep->phba;
struct beiscsi_conn *beiscsi_conn;
beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
beiscsi_ep->phba = NULL;
/* clear this to track freeing in beiscsi_ep_disconnect */
phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
/**
* Check if any connection resource allocated by driver
* is to be freed.This case occurs when target redirection
* or connection retry is done.
**/
if (!beiscsi_ep->conn)
return;
beiscsi_conn = beiscsi_ep->conn;
/**
* Break ep->conn link here so that completions after
* this are ignored.
*/
beiscsi_ep->conn = NULL;
if (beiscsi_conn->login_in_progress) {
beiscsi_free_mgmt_task_handles(beiscsi_conn,
beiscsi_conn->task);
beiscsi_conn->login_in_progress = 0;
}
}
/**
* beiscsi_open_conn - Ask FW to open a TCP connection
* @ep: pointer to device endpoint struct
* @src_addr: The source IP address
* @dst_addr: The Destination IP address
* @non_blocking: blocking or non-blocking call
*
* Asks the FW to open a TCP connection
*/
static int beiscsi_open_conn(struct iscsi_endpoint *ep,
struct sockaddr *src_addr,
struct sockaddr *dst_addr, int non_blocking)
{
struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
struct beiscsi_hba *phba = beiscsi_ep->phba;
struct tcp_connect_and_offload_out *ptcpcnct_out;
struct be_dma_mem nonemb_cmd;
unsigned int tag, req_memsize;
int ret = -ENOMEM;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_open_conn\n");
beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : No free cid available\n");
return ret;
}
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
beiscsi_ep->ep_cid);
phba->ep_array[BE_GET_CRI_FROM_CID
(beiscsi_ep->ep_cid)] = ep;
beiscsi_ep->cid_vld = 0;
if (is_chip_be2_be3r(phba))
req_memsize = sizeof(struct tcp_connect_and_offload_in);
else
req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
req_memsize,
&nonemb_cmd.dma, GFP_KERNEL);
if (nonemb_cmd.va == NULL) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Failed to allocate memory for"
" mgmt_open_connection\n");
beiscsi_free_ep(beiscsi_ep);
return -ENOMEM;
}
nonemb_cmd.size = req_memsize;
memset(nonemb_cmd.va, 0, nonemb_cmd.size);
tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
if (!tag) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : mgmt_open_connection Failed for cid=%d\n",
beiscsi_ep->ep_cid);
dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
nonemb_cmd.va, nonemb_cmd.dma);
beiscsi_free_ep(beiscsi_ep);
return -EAGAIN;
}
ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
if (ret) {
beiscsi_log(phba, KERN_ERR,
BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
"BS_%d : mgmt_open_connection Failed");
if (ret != -EBUSY)
dma_free_coherent(&phba->ctrl.pdev->dev,
nonemb_cmd.size, nonemb_cmd.va,
nonemb_cmd.dma);
beiscsi_free_ep(beiscsi_ep);
return ret;
}
ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
beiscsi_ep = ep->dd_data;
beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
beiscsi_ep->cid_vld = 1;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : mgmt_open_connection Success\n");
dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
nonemb_cmd.va, nonemb_cmd.dma);
return 0;
}
/**
* beiscsi_ep_connect - Ask chip to create TCP Conn
* @shost: Pointer to scsi_host structure
* @dst_addr: The IP address of Target
* @non_blocking: blocking or non-blocking call
*
* This routines first asks chip to create a connection and then allocates an EP
*/
struct iscsi_endpoint *
beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
int non_blocking)
{
struct beiscsi_hba *phba;
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_endpoint *ep;
int ret;
if (!shost) {
ret = -ENXIO;
pr_err("beiscsi_ep_connect shost is NULL\n");
return ERR_PTR(ret);
}
phba = iscsi_host_priv(shost);
if (!beiscsi_hba_is_online(phba)) {
ret = -EIO;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
return ERR_PTR(ret);
}
if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
ret = -EBUSY;
beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
"BS_%d : The Adapter Port state is Down!!!\n");
return ERR_PTR(ret);
}
ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
if (!ep) {
ret = -ENOMEM;
return ERR_PTR(ret);
}
beiscsi_ep = ep->dd_data;
beiscsi_ep->phba = phba;
beiscsi_ep->openiscsi_ep = ep;
ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
if (ret) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Failed in beiscsi_open_conn\n");
goto free_ep;
}
return ep;
free_ep:
iscsi_destroy_endpoint(ep);
return ERR_PTR(ret);
}
/**
* beiscsi_ep_poll - Poll to see if connection is established
* @ep: endpoint to be used
* @timeout_ms: timeout specified in millisecs
*
* Poll to see if TCP connection established
*/
int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
{
struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_ep_poll\n");
if (beiscsi_ep->cid_vld == 1)
return 1;
else
return 0;
}
/**
* beiscsi_flush_cq()- Flush the CQ created.
* @phba: ptr device priv structure.
*
* Before the connection resource are freed flush
* all the CQ enteries
**/
static void beiscsi_flush_cq(struct beiscsi_hba *phba)
{
uint16_t i;
struct be_eq_obj *pbe_eq;
struct hwi_controller *phwi_ctrlr;
struct hwi_context_memory *phwi_context;
phwi_ctrlr = phba->phwi_ctrlr;
phwi_context = phwi_ctrlr->phwi_ctxt;
for (i = 0; i < phba->num_cpus; i++) {
pbe_eq = &phwi_context->be_eq[i];
irq_poll_disable(&pbe_eq->iopoll);
beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
irq_poll_enable(&pbe_eq->iopoll);
}
}
/**
* beiscsi_conn_close - Invalidate and upload connection
* @beiscsi_ep: pointer to device endpoint struct
*
* Returns 0 on success, -1 on failure.
*/
static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
{
struct beiscsi_hba *phba = beiscsi_ep->phba;
unsigned int tag, attempts;
int ret;
/**
* Without successfully invalidating and uploading connection
* driver can't reuse the CID so attempt more than once.
*/
attempts = 0;
while (attempts++ < 3) {
tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
if (tag) {
ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
if (!ret)
break;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : invalidate conn failed cid %d\n",
beiscsi_ep->ep_cid);
}
}
/* wait for all completions to arrive, then process them */
msleep(250);
/* flush CQ entries */
beiscsi_flush_cq(phba);
if (attempts > 3)
return -1;
attempts = 0;
while (attempts++ < 3) {
tag = beiscsi_upload_cxn(phba, beiscsi_ep);
if (tag) {
ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
if (!ret)
break;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : upload conn failed cid %d\n",
beiscsi_ep->ep_cid);
}
}
if (attempts > 3)
return -1;
return 0;
}
/**
* beiscsi_ep_disconnect - Tears down the TCP connection
* @ep: endpoint to be used
*
* Tears down the TCP connection
*/
void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
{
struct beiscsi_endpoint *beiscsi_ep;
struct beiscsi_hba *phba;
uint16_t cri_index;
beiscsi_ep = ep->dd_data;
phba = beiscsi_ep->phba;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
beiscsi_ep->ep_cid);
cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
if (!phba->ep_array[cri_index]) {
__beiscsi_log(phba, KERN_ERR,
"BS_%d : ep_array at %u cid %u empty\n",
cri_index,
beiscsi_ep->ep_cid);
return;
}
if (!beiscsi_hba_is_online(phba)) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : HBA in error 0x%lx\n", phba->state);
} else {
/**
* Make CID available even if close fails.
* If not freed, FW might fail open using the CID.
*/
if (beiscsi_conn_close(beiscsi_ep) < 0)
__beiscsi_log(phba, KERN_ERR,
"BS_%d : close conn failed cid %d\n",
beiscsi_ep->ep_cid);
}
beiscsi_free_ep(beiscsi_ep);
if (!phba->conn_table[cri_index])
__beiscsi_log(phba, KERN_ERR,
"BS_%d : conn_table empty at %u: cid %u\n",
cri_index, beiscsi_ep->ep_cid);
phba->conn_table[cri_index] = NULL;
iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
}
umode_t beiscsi_attr_is_visible(int param_type, int param)
{
switch (param_type) {
case ISCSI_NET_PARAM:
switch (param) {
case ISCSI_NET_PARAM_IFACE_ENABLE:
case ISCSI_NET_PARAM_IPV4_ADDR:
case ISCSI_NET_PARAM_IPV4_SUBNET:
case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
case ISCSI_NET_PARAM_IPV4_GW:
case ISCSI_NET_PARAM_IPV6_ADDR:
case ISCSI_NET_PARAM_VLAN_ID:
case ISCSI_NET_PARAM_VLAN_PRIORITY:
case ISCSI_NET_PARAM_VLAN_ENABLED:
return S_IRUGO;
default:
return 0;
}
case ISCSI_HOST_PARAM:
switch (param) {
case ISCSI_HOST_PARAM_HWADDRESS:
case ISCSI_HOST_PARAM_INITIATOR_NAME:
case ISCSI_HOST_PARAM_PORT_STATE:
case ISCSI_HOST_PARAM_PORT_SPEED:
return S_IRUGO;
default:
return 0;
}
case ISCSI_PARAM:
switch (param) {
case ISCSI_PARAM_MAX_RECV_DLENGTH:
case ISCSI_PARAM_MAX_XMIT_DLENGTH:
case ISCSI_PARAM_HDRDGST_EN:
case ISCSI_PARAM_DATADGST_EN:
case ISCSI_PARAM_CONN_ADDRESS:
case ISCSI_PARAM_CONN_PORT:
case ISCSI_PARAM_EXP_STATSN:
case ISCSI_PARAM_PERSISTENT_ADDRESS:
case ISCSI_PARAM_PERSISTENT_PORT:
case ISCSI_PARAM_PING_TMO:
case ISCSI_PARAM_RECV_TMO:
case ISCSI_PARAM_INITIAL_R2T_EN:
case ISCSI_PARAM_MAX_R2T:
case ISCSI_PARAM_IMM_DATA_EN:
case ISCSI_PARAM_FIRST_BURST:
case ISCSI_PARAM_MAX_BURST:
case ISCSI_PARAM_PDU_INORDER_EN:
case ISCSI_PARAM_DATASEQ_INORDER_EN:
case ISCSI_PARAM_ERL:
case ISCSI_PARAM_TARGET_NAME:
case ISCSI_PARAM_TPGT:
case ISCSI_PARAM_USERNAME:
case ISCSI_PARAM_PASSWORD:
case ISCSI_PARAM_USERNAME_IN:
case ISCSI_PARAM_PASSWORD_IN:
case ISCSI_PARAM_FAST_ABORT:
case ISCSI_PARAM_ABORT_TMO:
case ISCSI_PARAM_LU_RESET_TMO:
case ISCSI_PARAM_IFACE_NAME:
case ISCSI_PARAM_INITIATOR_NAME:
return S_IRUGO;
default:
return 0;
}
}
return 0;
}
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