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path: root/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
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Diffstat (limited to 'drivers/scsi/cxgb3i/cxgb3i_iscsi.c')
-rw-r--r--drivers/scsi/cxgb3i/cxgb3i_iscsi.c1018
1 files changed, 0 insertions, 1018 deletions
diff --git a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
deleted file mode 100644
index 7b686abaae64..000000000000
--- a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
+++ /dev/null
@@ -1,1018 +0,0 @@
-/* cxgb3i_iscsi.c: Chelsio S3xx iSCSI driver.
- *
- * Copyright (c) 2008 Chelsio Communications, Inc.
- * Copyright (c) 2008 Mike Christie
- * Copyright (c) 2008 Red Hat, Inc. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.
- *
- * Written by: Karen Xie (kxie@chelsio.com)
- */
-
-#include <linux/inet.h>
-#include <linux/slab.h>
-#include <linux/crypto.h>
-#include <linux/if_vlan.h>
-#include <net/dst.h>
-#include <net/tcp.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_eh.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi.h>
-#include <scsi/iscsi_proto.h>
-#include <scsi/libiscsi.h>
-#include <scsi/scsi_transport_iscsi.h>
-
-#include "cxgb3i.h"
-#include "cxgb3i_pdu.h"
-
-#ifdef __DEBUG_CXGB3I_TAG__
-#define cxgb3i_tag_debug cxgb3i_log_debug
-#else
-#define cxgb3i_tag_debug(fmt...)
-#endif
-
-#ifdef __DEBUG_CXGB3I_API__
-#define cxgb3i_api_debug cxgb3i_log_debug
-#else
-#define cxgb3i_api_debug(fmt...)
-#endif
-
-/*
- * align pdu size to multiple of 512 for better performance
- */
-#define align_pdu_size(n) do { n = (n) & (~511); } while (0)
-
-static struct scsi_transport_template *cxgb3i_scsi_transport;
-static struct scsi_host_template cxgb3i_host_template;
-static struct iscsi_transport cxgb3i_iscsi_transport;
-static unsigned char sw_tag_idx_bits;
-static unsigned char sw_tag_age_bits;
-
-static LIST_HEAD(cxgb3i_snic_list);
-static DEFINE_RWLOCK(cxgb3i_snic_rwlock);
-
-/**
- * cxgb3i_adpater_find_by_tdev - find the cxgb3i_adapter structure via t3cdev
- * @tdev: t3cdev pointer
- */
-struct cxgb3i_adapter *cxgb3i_adapter_find_by_tdev(struct t3cdev *tdev)
-{
- struct cxgb3i_adapter *snic;
-
- read_lock(&cxgb3i_snic_rwlock);
- list_for_each_entry(snic, &cxgb3i_snic_list, list_head) {
- if (snic->tdev == tdev) {
- read_unlock(&cxgb3i_snic_rwlock);
- return snic;
- }
- }
- read_unlock(&cxgb3i_snic_rwlock);
- return NULL;
-}
-
-static inline int adapter_update(struct cxgb3i_adapter *snic)
-{
- cxgb3i_log_info("snic 0x%p, t3dev 0x%p, updating.\n",
- snic, snic->tdev);
- return cxgb3i_adapter_ddp_info(snic->tdev, &snic->tag_format,
- &snic->tx_max_size,
- &snic->rx_max_size);
-}
-
-static int adapter_add(struct cxgb3i_adapter *snic)
-{
- struct t3cdev *t3dev = snic->tdev;
- struct adapter *adapter = tdev2adap(t3dev);
- int i, err;
-
- snic->pdev = adapter->pdev;
- snic->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits;
-
- err = cxgb3i_adapter_ddp_info(t3dev, &snic->tag_format,
- &snic->tx_max_size,
- &snic->rx_max_size);
- if (err < 0)
- return err;
-
- for_each_port(adapter, i) {
- snic->hba[i] = cxgb3i_hba_host_add(snic, adapter->port[i]);
- if (!snic->hba[i])
- return -EINVAL;
- }
- snic->hba_cnt = adapter->params.nports;
-
- /* add to the list */
- write_lock(&cxgb3i_snic_rwlock);
- list_add_tail(&snic->list_head, &cxgb3i_snic_list);
- write_unlock(&cxgb3i_snic_rwlock);
-
- cxgb3i_log_info("t3dev 0x%p open, snic 0x%p, %u scsi hosts added.\n",
- t3dev, snic, snic->hba_cnt);
- return 0;
-}
-
-/**
- * cxgb3i_adapter_open - init a s3 adapter structure and any h/w settings
- * @t3dev: t3cdev adapter
- */
-void cxgb3i_adapter_open(struct t3cdev *t3dev)
-{
- struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(t3dev);
- int err;
-
- if (snic)
- err = adapter_update(snic);
- else {
- snic = kzalloc(sizeof(*snic), GFP_KERNEL);
- if (snic) {
- spin_lock_init(&snic->lock);
- snic->tdev = t3dev;
- err = adapter_add(snic);
- } else
- err = -ENOMEM;
- }
-
- if (err < 0) {
- cxgb3i_log_info("snic 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n",
- snic, snic ? snic->flags : 0, t3dev, err);
- if (snic) {
- snic->flags &= ~CXGB3I_ADAPTER_FLAG_RESET;
- cxgb3i_adapter_close(t3dev);
- }
- }
-}
-
-/**
- * cxgb3i_adapter_close - release the resources held and cleanup h/w settings
- * @t3dev: t3cdev adapter
- */
-void cxgb3i_adapter_close(struct t3cdev *t3dev)
-{
- struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(t3dev);
- int i;
-
- if (!snic || snic->flags & CXGB3I_ADAPTER_FLAG_RESET) {
- cxgb3i_log_info("t3dev 0x%p close, snic 0x%p, f 0x%x.\n",
- t3dev, snic, snic ? snic->flags : 0);
- return;
- }
-
- /* remove from the list */
- write_lock(&cxgb3i_snic_rwlock);
- list_del(&snic->list_head);
- write_unlock(&cxgb3i_snic_rwlock);
-
- for (i = 0; i < snic->hba_cnt; i++) {
- if (snic->hba[i]) {
- cxgb3i_hba_host_remove(snic->hba[i]);
- snic->hba[i] = NULL;
- }
- }
- cxgb3i_log_info("t3dev 0x%p close, snic 0x%p, %u scsi hosts removed.\n",
- t3dev, snic, snic->hba_cnt);
- kfree(snic);
-}
-
-/**
- * cxgb3i_hba_find_by_netdev - find the cxgb3i_hba structure via net_device
- * @t3dev: t3cdev adapter
- */
-static struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *ndev)
-{
- struct cxgb3i_adapter *snic;
- int i;
-
- if (ndev->priv_flags & IFF_802_1Q_VLAN)
- ndev = vlan_dev_real_dev(ndev);
-
- read_lock(&cxgb3i_snic_rwlock);
- list_for_each_entry(snic, &cxgb3i_snic_list, list_head) {
- for (i = 0; i < snic->hba_cnt; i++) {
- if (snic->hba[i]->ndev == ndev) {
- read_unlock(&cxgb3i_snic_rwlock);
- return snic->hba[i];
- }
- }
- }
- read_unlock(&cxgb3i_snic_rwlock);
- return NULL;
-}
-
-/**
- * cxgb3i_hba_host_add - register a new host with scsi/iscsi
- * @snic: the cxgb3i adapter
- * @ndev: associated net_device
- */
-struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *snic,
- struct net_device *ndev)
-{
- struct cxgb3i_hba *hba;
- struct Scsi_Host *shost;
- int err;
-
- shost = iscsi_host_alloc(&cxgb3i_host_template,
- sizeof(struct cxgb3i_hba), 1);
- if (!shost) {
- cxgb3i_log_info("snic 0x%p, ndev 0x%p, host_alloc failed.\n",
- snic, ndev);
- return NULL;
- }
-
- shost->transportt = cxgb3i_scsi_transport;
- shost->max_lun = CXGB3I_MAX_LUN;
- shost->max_id = CXGB3I_MAX_TARGET;
- shost->max_channel = 0;
- shost->max_cmd_len = 16;
-
- hba = iscsi_host_priv(shost);
- hba->snic = snic;
- hba->ndev = ndev;
- hba->shost = shost;
-
- pci_dev_get(snic->pdev);
- err = iscsi_host_add(shost, &snic->pdev->dev);
- if (err) {
- cxgb3i_log_info("snic 0x%p, ndev 0x%p, host_add failed.\n",
- snic, ndev);
- goto pci_dev_put;
- }
-
- cxgb3i_api_debug("shost 0x%p, hba 0x%p, no %u.\n",
- shost, hba, shost->host_no);
-
- return hba;
-
-pci_dev_put:
- pci_dev_put(snic->pdev);
- scsi_host_put(shost);
- return NULL;
-}
-
-/**
- * cxgb3i_hba_host_remove - de-register the host with scsi/iscsi
- * @hba: the cxgb3i hba
- */
-void cxgb3i_hba_host_remove(struct cxgb3i_hba *hba)
-{
- cxgb3i_api_debug("shost 0x%p, hba 0x%p, no %u.\n",
- hba->shost, hba, hba->shost->host_no);
- iscsi_host_remove(hba->shost);
- pci_dev_put(hba->snic->pdev);
- iscsi_host_free(hba->shost);
-}
-
-/**
- * cxgb3i_ep_connect - establish TCP connection to target portal
- * @shost: scsi host to use
- * @dst_addr: target IP address
- * @non_blocking: blocking or non-blocking call
- *
- * Initiates a TCP/IP connection to the dst_addr
- */
-static struct iscsi_endpoint *cxgb3i_ep_connect(struct Scsi_Host *shost,
- struct sockaddr *dst_addr,
- int non_blocking)
-{
- struct iscsi_endpoint *ep;
- struct cxgb3i_endpoint *cep;
- struct cxgb3i_hba *hba = NULL;
- struct s3_conn *c3cn = NULL;
- int err = 0;
-
- if (shost)
- hba = iscsi_host_priv(shost);
-
- cxgb3i_api_debug("shost 0x%p, hba 0x%p.\n", shost, hba);
-
- c3cn = cxgb3i_c3cn_create();
- if (!c3cn) {
- cxgb3i_log_info("ep connect OOM.\n");
- err = -ENOMEM;
- goto release_conn;
- }
-
- err = cxgb3i_c3cn_connect(hba ? hba->ndev : NULL, c3cn,
- (struct sockaddr_in *)dst_addr);
- if (err < 0) {
- cxgb3i_log_info("ep connect failed.\n");
- goto release_conn;
- }
-
- hba = cxgb3i_hba_find_by_netdev(c3cn->dst_cache->dev);
- if (!hba) {
- err = -ENOSPC;
- cxgb3i_log_info("NOT going through cxgbi device.\n");
- goto release_conn;
- }
-
- if (shost && hba != iscsi_host_priv(shost)) {
- err = -ENOSPC;
- cxgb3i_log_info("Could not connect through request host%u\n",
- shost->host_no);
- goto release_conn;
- }
-
- if (c3cn_is_closing(c3cn)) {
- err = -ENOSPC;
- cxgb3i_log_info("ep connect unable to connect.\n");
- goto release_conn;
- }
-
- ep = iscsi_create_endpoint(sizeof(*cep));
- if (!ep) {
- err = -ENOMEM;
- cxgb3i_log_info("iscsi alloc ep, OOM.\n");
- goto release_conn;
- }
- cep = ep->dd_data;
- cep->c3cn = c3cn;
- cep->hba = hba;
-
- cxgb3i_api_debug("ep 0x%p, 0x%p, c3cn 0x%p, hba 0x%p.\n",
- ep, cep, c3cn, hba);
- return ep;
-
-release_conn:
- cxgb3i_api_debug("conn 0x%p failed, release.\n", c3cn);
- if (c3cn)
- cxgb3i_c3cn_release(c3cn);
- return ERR_PTR(err);
-}
-
-/**
- * cxgb3i_ep_poll - polls for TCP connection establishement
- * @ep: TCP connection (endpoint) handle
- * @timeout_ms: timeout value in milli secs
- *
- * polls for TCP connect request to complete
- */
-static int cxgb3i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
-{
- struct cxgb3i_endpoint *cep = ep->dd_data;
- struct s3_conn *c3cn = cep->c3cn;
-
- if (!c3cn_is_established(c3cn))
- return 0;
- cxgb3i_api_debug("ep 0x%p, c3cn 0x%p established.\n", ep, c3cn);
- return 1;
-}
-
-/**
- * cxgb3i_ep_disconnect - teardown TCP connection
- * @ep: TCP connection (endpoint) handle
- *
- * teardown TCP connection
- */
-static void cxgb3i_ep_disconnect(struct iscsi_endpoint *ep)
-{
- struct cxgb3i_endpoint *cep = ep->dd_data;
- struct cxgb3i_conn *cconn = cep->cconn;
-
- cxgb3i_api_debug("ep 0x%p, cep 0x%p.\n", ep, cep);
-
- if (cconn && cconn->conn) {
- /*
- * stop the xmit path so the xmit_pdu function is
- * not being called
- */
- iscsi_suspend_tx(cconn->conn);
-
- write_lock_bh(&cep->c3cn->callback_lock);
- cep->c3cn->user_data = NULL;
- cconn->cep = NULL;
- write_unlock_bh(&cep->c3cn->callback_lock);
- }
-
- cxgb3i_api_debug("ep 0x%p, cep 0x%p, release c3cn 0x%p.\n",
- ep, cep, cep->c3cn);
- cxgb3i_c3cn_release(cep->c3cn);
- iscsi_destroy_endpoint(ep);
-}
-
-/**
- * cxgb3i_session_create - create a new iscsi session
- * @cmds_max: max # of commands
- * @qdepth: scsi queue depth
- * @initial_cmdsn: initial iscsi CMDSN for this session
- *
- * Creates a new iSCSI session
- */
-static struct iscsi_cls_session *
-cxgb3i_session_create(struct iscsi_endpoint *ep, u16 cmds_max, u16 qdepth,
- u32 initial_cmdsn)
-{
- struct cxgb3i_endpoint *cep;
- struct cxgb3i_hba *hba;
- struct Scsi_Host *shost;
- struct iscsi_cls_session *cls_session;
- struct iscsi_session *session;
-
- if (!ep) {
- cxgb3i_log_error("%s, missing endpoint.\n", __func__);
- return NULL;
- }
-
- cep = ep->dd_data;
- hba = cep->hba;
- shost = hba->shost;
- cxgb3i_api_debug("ep 0x%p, cep 0x%p, hba 0x%p.\n", ep, cep, hba);
- BUG_ON(hba != iscsi_host_priv(shost));
-
- cls_session = iscsi_session_setup(&cxgb3i_iscsi_transport, shost,
- cmds_max, 0,
- sizeof(struct iscsi_tcp_task) +
- sizeof(struct cxgb3i_task_data),
- initial_cmdsn, ISCSI_MAX_TARGET);
- if (!cls_session)
- return NULL;
- session = cls_session->dd_data;
- if (iscsi_tcp_r2tpool_alloc(session))
- goto remove_session;
-
- return cls_session;
-
-remove_session:
- iscsi_session_teardown(cls_session);
- return NULL;
-}
-
-/**
- * cxgb3i_session_destroy - destroys iscsi session
- * @cls_session: pointer to iscsi cls session
- *
- * Destroys an iSCSI session instance and releases its all resources held
- */
-static void cxgb3i_session_destroy(struct iscsi_cls_session *cls_session)
-{
- cxgb3i_api_debug("sess 0x%p.\n", cls_session);
- iscsi_tcp_r2tpool_free(cls_session->dd_data);
- iscsi_session_teardown(cls_session);
-}
-
-/**
- * cxgb3i_conn_max_xmit_dlength -- calc the max. xmit pdu segment size
- * @conn: iscsi connection
- * check the max. xmit pdu payload, reduce it if needed
- */
-static inline int cxgb3i_conn_max_xmit_dlength(struct iscsi_conn *conn)
-
-{
- struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- unsigned int max = max(512 * MAX_SKB_FRAGS, SKB_TX_HEADROOM);
-
- max = min(cconn->hba->snic->tx_max_size, max);
- if (conn->max_xmit_dlength)
- conn->max_xmit_dlength = min(conn->max_xmit_dlength, max);
- else
- conn->max_xmit_dlength = max;
- align_pdu_size(conn->max_xmit_dlength);
- cxgb3i_api_debug("conn 0x%p, max xmit %u.\n",
- conn, conn->max_xmit_dlength);
- return 0;
-}
-
-/**
- * cxgb3i_conn_max_recv_dlength -- check the max. recv pdu segment size
- * @conn: iscsi connection
- * return 0 if the value is valid, < 0 otherwise.
- */
-static inline int cxgb3i_conn_max_recv_dlength(struct iscsi_conn *conn)
-{
- struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- unsigned int max = cconn->hba->snic->rx_max_size;
-
- align_pdu_size(max);
- if (conn->max_recv_dlength) {
- if (conn->max_recv_dlength > max) {
- cxgb3i_log_error("MaxRecvDataSegmentLength %u too big."
- " Need to be <= %u.\n",
- conn->max_recv_dlength, max);
- return -EINVAL;
- }
- conn->max_recv_dlength = min(conn->max_recv_dlength, max);
- align_pdu_size(conn->max_recv_dlength);
- } else
- conn->max_recv_dlength = max;
- cxgb3i_api_debug("conn 0x%p, max recv %u.\n",
- conn, conn->max_recv_dlength);
- return 0;
-}
-
-/**
- * cxgb3i_conn_create - create iscsi connection instance
- * @cls_session: pointer to iscsi cls session
- * @cid: iscsi cid
- *
- * Creates a new iSCSI connection instance for a given session
- */
-static struct iscsi_cls_conn *cxgb3i_conn_create(struct iscsi_cls_session
- *cls_session, u32 cid)
-{
- struct iscsi_cls_conn *cls_conn;
- struct iscsi_conn *conn;
- struct iscsi_tcp_conn *tcp_conn;
- struct cxgb3i_conn *cconn;
-
- cxgb3i_api_debug("sess 0x%p, cid %u.\n", cls_session, cid);
-
- cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid);
- if (!cls_conn)
- return NULL;
- conn = cls_conn->dd_data;
- tcp_conn = conn->dd_data;
- cconn = tcp_conn->dd_data;
-
- cconn->conn = conn;
- return cls_conn;
-}
-
-/**
- * cxgb3i_conn_bind - binds iscsi sess, conn and endpoint together
- * @cls_session: pointer to iscsi cls session
- * @cls_conn: pointer to iscsi cls conn
- * @transport_eph: 64-bit EP handle
- * @is_leading: leading connection on this session?
- *
- * Binds together an iSCSI session, an iSCSI connection and a
- * TCP connection. This routine returns error code if the TCP
- * connection does not belong on the device iSCSI sess/conn is bound
- */
-
-static int cxgb3i_conn_bind(struct iscsi_cls_session *cls_session,
- struct iscsi_cls_conn *cls_conn,
- u64 transport_eph, int is_leading)
-{
- struct iscsi_conn *conn = cls_conn->dd_data;
- struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- struct cxgb3i_adapter *snic;
- struct iscsi_endpoint *ep;
- struct cxgb3i_endpoint *cep;
- struct s3_conn *c3cn;
- int err;
-
- ep = iscsi_lookup_endpoint(transport_eph);
- if (!ep)
- return -EINVAL;
-
- /* setup ddp pagesize */
- cep = ep->dd_data;
- c3cn = cep->c3cn;
- snic = cep->hba->snic;
- err = cxgb3i_setup_conn_host_pagesize(snic->tdev, c3cn->tid, 0);
- if (err < 0)
- return err;
-
- cxgb3i_api_debug("ep 0x%p, cls sess 0x%p, cls conn 0x%p.\n",
- ep, cls_session, cls_conn);
-
- err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
- if (err)
- return -EINVAL;
-
- /* calculate the tag idx bits needed for this conn based on cmds_max */
- cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1;
- cxgb3i_api_debug("session cmds_max 0x%x, bits %u.\n",
- conn->session->cmds_max, cconn->task_idx_bits);
-
- read_lock(&c3cn->callback_lock);
- c3cn->user_data = conn;
- cconn->hba = cep->hba;
- cconn->cep = cep;
- cep->cconn = cconn;
- read_unlock(&c3cn->callback_lock);
-
- cxgb3i_conn_max_xmit_dlength(conn);
- cxgb3i_conn_max_recv_dlength(conn);
-
- spin_lock_bh(&conn->session->lock);
- sprintf(conn->portal_address, "%pI4", &c3cn->daddr.sin_addr.s_addr);
- conn->portal_port = ntohs(c3cn->daddr.sin_port);
- spin_unlock_bh(&conn->session->lock);
-
- /* init recv engine */
- iscsi_tcp_hdr_recv_prep(tcp_conn);
-
- return 0;
-}
-
-/**
- * cxgb3i_conn_get_param - return iscsi connection parameter to caller
- * @cls_conn: pointer to iscsi cls conn
- * @param: parameter type identifier
- * @buf: buffer pointer
- *
- * returns iSCSI connection parameters
- */
-static int cxgb3i_conn_get_param(struct iscsi_cls_conn *cls_conn,
- enum iscsi_param param, char *buf)
-{
- struct iscsi_conn *conn = cls_conn->dd_data;
- int len;
-
- cxgb3i_api_debug("cls_conn 0x%p, param %d.\n", cls_conn, param);
-
- switch (param) {
- case ISCSI_PARAM_CONN_PORT:
- spin_lock_bh(&conn->session->lock);
- len = sprintf(buf, "%hu\n", conn->portal_port);
- spin_unlock_bh(&conn->session->lock);
- break;
- case ISCSI_PARAM_CONN_ADDRESS:
- spin_lock_bh(&conn->session->lock);
- len = sprintf(buf, "%s\n", conn->portal_address);
- spin_unlock_bh(&conn->session->lock);
- break;
- default:
- return iscsi_conn_get_param(cls_conn, param, buf);
- }
-
- return len;
-}
-
-/**
- * cxgb3i_conn_set_param - set iscsi connection parameter
- * @cls_conn: pointer to iscsi cls conn
- * @param: parameter type identifier
- * @buf: buffer pointer
- * @buflen: buffer length
- *
- * set iSCSI connection parameters
- */
-static int cxgb3i_conn_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 iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- struct cxgb3i_adapter *snic = cconn->hba->snic;
- struct s3_conn *c3cn = cconn->cep->c3cn;
- int value, err = 0;
-
- switch (param) {
- case ISCSI_PARAM_HDRDGST_EN:
- err = iscsi_set_param(cls_conn, param, buf, buflen);
- if (!err && conn->hdrdgst_en)
- err = cxgb3i_setup_conn_digest(snic->tdev, c3cn->tid,
- conn->hdrdgst_en,
- conn->datadgst_en, 0);
- break;
- case ISCSI_PARAM_DATADGST_EN:
- err = iscsi_set_param(cls_conn, param, buf, buflen);
- if (!err && conn->datadgst_en)
- err = cxgb3i_setup_conn_digest(snic->tdev, c3cn->tid,
- conn->hdrdgst_en,
- conn->datadgst_en, 0);
- break;
- case ISCSI_PARAM_MAX_R2T:
- sscanf(buf, "%d", &value);
- if (value <= 0 || !is_power_of_2(value))
- return -EINVAL;
- if (session->max_r2t == value)
- break;
- iscsi_tcp_r2tpool_free(session);
- err = iscsi_set_param(cls_conn, param, buf, buflen);
- if (!err && iscsi_tcp_r2tpool_alloc(session))
- return -ENOMEM;
- case ISCSI_PARAM_MAX_RECV_DLENGTH:
- err = iscsi_set_param(cls_conn, param, buf, buflen);
- if (!err)
- err = cxgb3i_conn_max_recv_dlength(conn);
- break;
- case ISCSI_PARAM_MAX_XMIT_DLENGTH:
- err = iscsi_set_param(cls_conn, param, buf, buflen);
- if (!err)
- err = cxgb3i_conn_max_xmit_dlength(conn);
- break;
- default:
- return iscsi_set_param(cls_conn, param, buf, buflen);
- }
- return err;
-}
-
-/**
- * cxgb3i_host_set_param - configure host (adapter) related parameters
- * @shost: scsi host pointer
- * @param: parameter type identifier
- * @buf: buffer pointer
- */
-static int cxgb3i_host_set_param(struct Scsi_Host *shost,
- enum iscsi_host_param param,
- char *buf, int buflen)
-{
- struct cxgb3i_hba *hba = iscsi_host_priv(shost);
-
- if (!hba->ndev) {
- shost_printk(KERN_ERR, shost, "Could not set host param. "
- "Netdev for host not set.\n");
- return -ENODEV;
- }
-
- cxgb3i_api_debug("param %d, buf %s.\n", param, buf);
-
- switch (param) {
- case ISCSI_HOST_PARAM_IPADDRESS:
- {
- __be32 addr = in_aton(buf);
- cxgb3i_set_private_ipv4addr(hba->ndev, addr);
- return 0;
- }
- case ISCSI_HOST_PARAM_HWADDRESS:
- case ISCSI_HOST_PARAM_NETDEV_NAME:
- /* ignore */
- return 0;
- default:
- return iscsi_host_set_param(shost, param, buf, buflen);
- }
-}
-
-/**
- * cxgb3i_host_get_param - returns host (adapter) related parameters
- * @shost: scsi host pointer
- * @param: parameter type identifier
- * @buf: buffer pointer
- */
-static int cxgb3i_host_get_param(struct Scsi_Host *shost,
- enum iscsi_host_param param, char *buf)
-{
- struct cxgb3i_hba *hba = iscsi_host_priv(shost);
- int len = 0;
-
- if (!hba->ndev) {
- shost_printk(KERN_ERR, shost, "Could not set host param. "
- "Netdev for host not set.\n");
- return -ENODEV;
- }
-
- cxgb3i_api_debug("hba %s, param %d.\n", hba->ndev->name, param);
-
- switch (param) {
- case ISCSI_HOST_PARAM_HWADDRESS:
- len = sysfs_format_mac(buf, hba->ndev->dev_addr, 6);
- break;
- case ISCSI_HOST_PARAM_NETDEV_NAME:
- len = sprintf(buf, "%s\n", hba->ndev->name);
- break;
- case ISCSI_HOST_PARAM_IPADDRESS:
- {
- __be32 addr;
-
- addr = cxgb3i_get_private_ipv4addr(hba->ndev);
- len = sprintf(buf, "%pI4", &addr);
- break;
- }
- default:
- return iscsi_host_get_param(shost, param, buf);
- }
- return len;
-}
-
-/**
- * cxgb3i_conn_get_stats - returns iSCSI stats
- * @cls_conn: pointer to iscsi cls conn
- * @stats: pointer to iscsi statistic struct
- */
-static void cxgb3i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
- struct iscsi_stats *stats)
-{
- struct iscsi_conn *conn = cls_conn->dd_data;
-
- stats->txdata_octets = conn->txdata_octets;
- stats->rxdata_octets = conn->rxdata_octets;
- stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
- stats->dataout_pdus = conn->dataout_pdus_cnt;
- stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
- stats->datain_pdus = conn->datain_pdus_cnt;
- stats->r2t_pdus = conn->r2t_pdus_cnt;
- stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
- stats->tmfrsp_pdus = conn->tmfrsp_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;
-}
-
-/**
- * cxgb3i_parse_itt - get the idx and age bits from a given tag
- * @conn: iscsi connection
- * @itt: itt tag
- * @idx: task index, filled in by this function
- * @age: session age, filled in by this function
- */
-static void cxgb3i_parse_itt(struct iscsi_conn *conn, itt_t itt,
- int *idx, int *age)
-{
- struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- struct cxgb3i_adapter *snic = cconn->hba->snic;
- u32 tag = ntohl((__force u32) itt);
- u32 sw_bits;
-
- sw_bits = cxgb3i_tag_nonrsvd_bits(&snic->tag_format, tag);
- if (idx)
- *idx = sw_bits & ((1 << cconn->task_idx_bits) - 1);
- if (age)
- *age = (sw_bits >> cconn->task_idx_bits) & ISCSI_AGE_MASK;
-
- cxgb3i_tag_debug("parse tag 0x%x/0x%x, sw 0x%x, itt 0x%x, age 0x%x.\n",
- tag, itt, sw_bits, idx ? *idx : 0xFFFFF,
- age ? *age : 0xFF);
-}
-
-/**
- * cxgb3i_reserve_itt - generate tag for a give task
- * @task: iscsi task
- * @hdr_itt: tag, filled in by this function
- * Set up ddp for scsi read tasks if possible.
- */
-int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt)
-{
- struct scsi_cmnd *sc = task->sc;
- struct iscsi_conn *conn = task->conn;
- struct iscsi_session *sess = conn->session;
- struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- struct cxgb3i_adapter *snic = cconn->hba->snic;
- struct cxgb3i_tag_format *tformat = &snic->tag_format;
- u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt;
- u32 tag;
- int err = -EINVAL;
-
- if (sc &&
- (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) &&
- cxgb3i_sw_tag_usable(tformat, sw_tag)) {
- struct s3_conn *c3cn = cconn->cep->c3cn;
- struct cxgb3i_gather_list *gl;
-
- gl = cxgb3i_ddp_make_gl(scsi_in(sc)->length,
- scsi_in(sc)->table.sgl,
- scsi_in(sc)->table.nents,
- snic->pdev,
- GFP_ATOMIC);
- if (gl) {
- tag = sw_tag;
- err = cxgb3i_ddp_tag_reserve(snic->tdev, c3cn->tid,
- tformat, &tag,
- gl, GFP_ATOMIC);
- if (err < 0)
- cxgb3i_ddp_release_gl(gl, snic->pdev);
- }
- }
-
- if (err < 0)
- tag = cxgb3i_set_non_ddp_tag(tformat, sw_tag);
- /* the itt need to sent in big-endian order */
- *hdr_itt = (__force itt_t)htonl(tag);
-
- cxgb3i_tag_debug("new tag 0x%x/0x%x (itt 0x%x, age 0x%x).\n",
- tag, *hdr_itt, task->itt, sess->age);
- return 0;
-}
-
-/**
- * cxgb3i_release_itt - release the tag for a given task
- * @task: iscsi task
- * @hdr_itt: tag
- * If the tag is a ddp tag, release the ddp setup
- */
-void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt)
-{
- struct scsi_cmnd *sc = task->sc;
- struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
- struct cxgb3i_conn *cconn = tcp_conn->dd_data;
- struct cxgb3i_adapter *snic = cconn->hba->snic;
- struct cxgb3i_tag_format *tformat = &snic->tag_format;
- u32 tag = ntohl((__force u32)hdr_itt);
-
- cxgb3i_tag_debug("release tag 0x%x.\n", tag);
-
- if (sc &&
- (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) &&
- cxgb3i_is_ddp_tag(tformat, tag))
- cxgb3i_ddp_tag_release(snic->tdev, tag);
-}
-
-/**
- * cxgb3i_host_template -- Scsi_Host_Template structure
- * used when registering with the scsi mid layer
- */
-static struct scsi_host_template cxgb3i_host_template = {
- .module = THIS_MODULE,
- .name = "Chelsio S3xx iSCSI Initiator",
- .proc_name = "cxgb3i",
- .queuecommand = iscsi_queuecommand,
- .change_queue_depth = iscsi_change_queue_depth,
- .can_queue = CXGB3I_SCSI_HOST_QDEPTH,
- .sg_tablesize = SG_ALL,
- .max_sectors = 0xFFFF,
- .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
- .eh_abort_handler = iscsi_eh_abort,
- .eh_device_reset_handler = iscsi_eh_device_reset,
- .eh_target_reset_handler = iscsi_eh_recover_target,
- .target_alloc = iscsi_target_alloc,
- .use_clustering = DISABLE_CLUSTERING,
- .this_id = -1,
-};
-
-static struct iscsi_transport cxgb3i_iscsi_transport = {
- .owner = THIS_MODULE,
- .name = "cxgb3i",
- .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST
- | CAP_DATADGST | CAP_DIGEST_OFFLOAD |
- CAP_PADDING_OFFLOAD,
- .param_mask = ISCSI_MAX_RECV_DLENGTH |
- ISCSI_MAX_XMIT_DLENGTH |
- ISCSI_HDRDGST_EN |
- ISCSI_DATADGST_EN |
- ISCSI_INITIAL_R2T_EN |
- ISCSI_MAX_R2T |
- ISCSI_IMM_DATA_EN |
- ISCSI_FIRST_BURST |
- ISCSI_MAX_BURST |
- ISCSI_PDU_INORDER_EN |
- ISCSI_DATASEQ_INORDER_EN |
- ISCSI_ERL |
- ISCSI_CONN_PORT |
- ISCSI_CONN_ADDRESS |
- ISCSI_EXP_STATSN |
- ISCSI_PERSISTENT_PORT |
- ISCSI_PERSISTENT_ADDRESS |
- ISCSI_TARGET_NAME | ISCSI_TPGT |
- ISCSI_USERNAME | ISCSI_PASSWORD |
- ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
- ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
- ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
- ISCSI_PING_TMO | ISCSI_RECV_TMO |
- ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
- .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
- ISCSI_HOST_INITIATOR_NAME | ISCSI_HOST_NETDEV_NAME,
- .get_host_param = cxgb3i_host_get_param,
- .set_host_param = cxgb3i_host_set_param,
- /* session management */
- .create_session = cxgb3i_session_create,
- .destroy_session = cxgb3i_session_destroy,
- .get_session_param = iscsi_session_get_param,
- /* connection management */
- .create_conn = cxgb3i_conn_create,
- .bind_conn = cxgb3i_conn_bind,
- .destroy_conn = iscsi_tcp_conn_teardown,
- .start_conn = iscsi_conn_start,
- .stop_conn = iscsi_conn_stop,
- .get_conn_param = cxgb3i_conn_get_param,
- .set_param = cxgb3i_conn_set_param,
- .get_stats = cxgb3i_conn_get_stats,
- /* pdu xmit req. from user space */
- .send_pdu = iscsi_conn_send_pdu,
- /* task */
- .init_task = iscsi_tcp_task_init,
- .xmit_task = iscsi_tcp_task_xmit,
- .cleanup_task = cxgb3i_conn_cleanup_task,
-
- /* pdu */
- .alloc_pdu = cxgb3i_conn_alloc_pdu,
- .init_pdu = cxgb3i_conn_init_pdu,
- .xmit_pdu = cxgb3i_conn_xmit_pdu,
- .parse_pdu_itt = cxgb3i_parse_itt,
-
- /* TCP connect/disconnect */
- .ep_connect = cxgb3i_ep_connect,
- .ep_poll = cxgb3i_ep_poll,
- .ep_disconnect = cxgb3i_ep_disconnect,
- /* Error recovery timeout call */
- .session_recovery_timedout = iscsi_session_recovery_timedout,
-};
-
-int cxgb3i_iscsi_init(void)
-{
- sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1;
- sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1;
- cxgb3i_log_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n",
- ISCSI_ITT_MASK, sw_tag_idx_bits,
- ISCSI_AGE_MASK, sw_tag_age_bits);
-
- cxgb3i_scsi_transport =
- iscsi_register_transport(&cxgb3i_iscsi_transport);
- if (!cxgb3i_scsi_transport) {
- cxgb3i_log_error("Could not register cxgb3i transport.\n");
- return -ENODEV;
- }
- cxgb3i_api_debug("cxgb3i transport 0x%p.\n", cxgb3i_scsi_transport);
- return 0;
-}
-
-void cxgb3i_iscsi_cleanup(void)
-{
- if (cxgb3i_scsi_transport) {
- cxgb3i_api_debug("cxgb3i transport 0x%p.\n",
- cxgb3i_scsi_transport);
- iscsi_unregister_transport(&cxgb3i_iscsi_transport);
- }
-}