2010-08-17 11:55:53 +08:00
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/*
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* libcxgbi.c: Chelsio common library for T3/T4 iSCSI driver.
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*
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* Copyright (c) 2010 Chelsio Communications, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*
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* Written by: Karen Xie (kxie@chelsio.com)
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* Written by: Rakesh Ranjan (rranjan@chelsio.com)
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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#include <linux/skbuff.h>
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#include <linux/crypto.h>
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#include <linux/scatterlist.h>
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#include <linux/pci.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_host.h>
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#include <linux/if_vlan.h>
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#include <linux/inet.h>
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#include <net/dst.h>
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#include <net/route.h>
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#include <linux/inetdevice.h> /* ip_dev_find */
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#include <net/tcp.h>
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static unsigned int dbg_level;
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#include "libcxgbi.h"
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#define DRV_MODULE_NAME "libcxgbi"
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#define DRV_MODULE_DESC "Chelsio iSCSI driver library"
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#define DRV_MODULE_VERSION "0.9.0"
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#define DRV_MODULE_RELDATE "Jun. 2010"
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MODULE_AUTHOR("Chelsio Communications, Inc.");
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MODULE_DESCRIPTION(DRV_MODULE_DESC);
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MODULE_VERSION(DRV_MODULE_VERSION);
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MODULE_LICENSE("GPL");
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module_param(dbg_level, uint, 0644);
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MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)");
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/*
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* cxgbi device management
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* maintains a list of the cxgbi devices
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*/
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static LIST_HEAD(cdev_list);
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static DEFINE_MUTEX(cdev_mutex);
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int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,
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unsigned int max_conn)
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{
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struct cxgbi_ports_map *pmap = &cdev->pmap;
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pmap->port_csk = cxgbi_alloc_big_mem(max_conn *
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sizeof(struct cxgbi_sock *),
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GFP_KERNEL);
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if (!pmap->port_csk) {
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pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn);
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return -ENOMEM;
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}
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pmap->max_connect = max_conn;
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pmap->sport_base = base;
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spin_lock_init(&pmap->lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create);
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void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev)
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{
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struct cxgbi_ports_map *pmap = &cdev->pmap;
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struct cxgbi_sock *csk;
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int i;
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for (i = 0; i < pmap->max_connect; i++) {
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if (pmap->port_csk[i]) {
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csk = pmap->port_csk[i];
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pmap->port_csk[i] = NULL;
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log_debug(1 << CXGBI_DBG_SOCK,
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"csk 0x%p, cdev 0x%p, offload down.\n",
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csk, cdev);
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spin_lock_bh(&csk->lock);
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cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN);
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cxgbi_sock_closed(csk);
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spin_unlock_bh(&csk->lock);
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cxgbi_sock_put(csk);
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}
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}
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup);
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static inline void cxgbi_device_destroy(struct cxgbi_device *cdev)
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{
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log_debug(1 << CXGBI_DBG_DEV,
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"cdev 0x%p, p# %u.\n", cdev, cdev->nports);
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cxgbi_hbas_remove(cdev);
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cxgbi_device_portmap_cleanup(cdev);
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if (cdev->dev_ddp_cleanup)
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cdev->dev_ddp_cleanup(cdev);
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else
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cxgbi_ddp_cleanup(cdev);
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if (cdev->ddp)
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cxgbi_ddp_cleanup(cdev);
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if (cdev->pmap.max_connect)
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cxgbi_free_big_mem(cdev->pmap.port_csk);
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kfree(cdev);
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}
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struct cxgbi_device *cxgbi_device_register(unsigned int extra,
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unsigned int nports)
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{
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struct cxgbi_device *cdev;
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cdev = kzalloc(sizeof(*cdev) + extra + nports *
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(sizeof(struct cxgbi_hba *) +
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sizeof(struct net_device *)),
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GFP_KERNEL);
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if (!cdev) {
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pr_warn("nport %d, OOM.\n", nports);
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return NULL;
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}
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cdev->ports = (struct net_device **)(cdev + 1);
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cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports *
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sizeof(struct net_device *));
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if (extra)
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cdev->dd_data = ((char *)cdev->hbas) +
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nports * sizeof(struct cxgbi_hba *);
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spin_lock_init(&cdev->pmap.lock);
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mutex_lock(&cdev_mutex);
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list_add_tail(&cdev->list_head, &cdev_list);
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mutex_unlock(&cdev_mutex);
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log_debug(1 << CXGBI_DBG_DEV,
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"cdev 0x%p, p# %u.\n", cdev, nports);
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return cdev;
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_register);
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void cxgbi_device_unregister(struct cxgbi_device *cdev)
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{
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log_debug(1 << CXGBI_DBG_DEV,
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"cdev 0x%p, p# %u,%s.\n",
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cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : "");
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mutex_lock(&cdev_mutex);
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list_del(&cdev->list_head);
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mutex_unlock(&cdev_mutex);
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cxgbi_device_destroy(cdev);
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_unregister);
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void cxgbi_device_unregister_all(unsigned int flag)
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{
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struct cxgbi_device *cdev, *tmp;
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mutex_lock(&cdev_mutex);
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list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
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if ((cdev->flags & flag) == flag) {
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log_debug(1 << CXGBI_DBG_DEV,
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"cdev 0x%p, p# %u,%s.\n",
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cdev, cdev->nports, cdev->nports ?
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cdev->ports[0]->name : "");
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list_del(&cdev->list_head);
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cxgbi_device_destroy(cdev);
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}
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}
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mutex_unlock(&cdev_mutex);
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all);
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struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
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{
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struct cxgbi_device *cdev, *tmp;
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mutex_lock(&cdev_mutex);
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list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
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if (cdev->lldev == lldev) {
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mutex_unlock(&cdev_mutex);
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return cdev;
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}
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}
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mutex_unlock(&cdev_mutex);
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log_debug(1 << CXGBI_DBG_DEV,
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"lldev 0x%p, NO match found.\n", lldev);
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return NULL;
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}
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EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
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static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
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int *port)
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{
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2010-09-24 07:43:23 +08:00
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struct net_device *vdev = NULL;
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2010-08-17 11:55:53 +08:00
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struct cxgbi_device *cdev, *tmp;
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int i;
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2010-09-24 07:43:23 +08:00
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if (ndev->priv_flags & IFF_802_1Q_VLAN) {
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vdev = ndev;
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2010-08-17 11:55:53 +08:00
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ndev = vlan_dev_real_dev(ndev);
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2010-09-24 07:43:23 +08:00
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log_debug(1 << CXGBI_DBG_DEV,
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"vlan dev %s -> %s.\n", vdev->name, ndev->name);
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}
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2010-08-17 11:55:53 +08:00
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mutex_lock(&cdev_mutex);
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list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
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for (i = 0; i < cdev->nports; i++) {
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if (ndev == cdev->ports[i]) {
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2010-09-24 07:43:23 +08:00
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cdev->hbas[i]->vdev = vdev;
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2010-08-17 11:55:53 +08:00
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mutex_unlock(&cdev_mutex);
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if (port)
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*port = i;
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return cdev;
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}
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}
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}
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mutex_unlock(&cdev_mutex);
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log_debug(1 << CXGBI_DBG_DEV,
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"ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
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return NULL;
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}
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void cxgbi_hbas_remove(struct cxgbi_device *cdev)
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{
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int i;
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struct cxgbi_hba *chba;
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log_debug(1 << CXGBI_DBG_DEV,
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"cdev 0x%p, p#%u.\n", cdev, cdev->nports);
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for (i = 0; i < cdev->nports; i++) {
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chba = cdev->hbas[i];
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if (chba) {
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cdev->hbas[i] = NULL;
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iscsi_host_remove(chba->shost);
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pci_dev_put(cdev->pdev);
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iscsi_host_free(chba->shost);
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}
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}
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}
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EXPORT_SYMBOL_GPL(cxgbi_hbas_remove);
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int cxgbi_hbas_add(struct cxgbi_device *cdev, unsigned int max_lun,
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unsigned int max_id, struct scsi_host_template *sht,
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struct scsi_transport_template *stt)
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{
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struct cxgbi_hba *chba;
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struct Scsi_Host *shost;
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int i, err;
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log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports);
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for (i = 0; i < cdev->nports; i++) {
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shost = iscsi_host_alloc(sht, sizeof(*chba), 1);
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if (!shost) {
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pr_info("0x%p, p%d, %s, host alloc failed.\n",
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cdev, i, cdev->ports[i]->name);
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err = -ENOMEM;
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goto err_out;
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}
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shost->transportt = stt;
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shost->max_lun = max_lun;
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shost->max_id = max_id;
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shost->max_channel = 0;
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shost->max_cmd_len = 16;
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chba = iscsi_host_priv(shost);
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chba->cdev = cdev;
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chba->ndev = cdev->ports[i];
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chba->shost = shost;
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log_debug(1 << CXGBI_DBG_DEV,
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"cdev 0x%p, p#%d %s: chba 0x%p.\n",
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cdev, i, cdev->ports[i]->name, chba);
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pci_dev_get(cdev->pdev);
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err = iscsi_host_add(shost, &cdev->pdev->dev);
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if (err) {
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pr_info("cdev 0x%p, p#%d %s, host add failed.\n",
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cdev, i, cdev->ports[i]->name);
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pci_dev_put(cdev->pdev);
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scsi_host_put(shost);
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goto err_out;
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}
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cdev->hbas[i] = chba;
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}
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return 0;
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err_out:
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cxgbi_hbas_remove(cdev);
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return err;
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}
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EXPORT_SYMBOL_GPL(cxgbi_hbas_add);
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/*
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* iSCSI offload
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*
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* - source port management
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* To find a free source port in the port allocation map we use a very simple
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* rotor scheme to look for the next free port.
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*
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* If a source port has been specified make sure that it doesn't collide with
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* our normal source port allocation map. If it's outside the range of our
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* allocation/deallocation scheme just let them use it.
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*
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* If the source port is outside our allocation range, the caller is
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* responsible for keeping track of their port usage.
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*/
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static int sock_get_port(struct cxgbi_sock *csk)
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{
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struct cxgbi_device *cdev = csk->cdev;
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struct cxgbi_ports_map *pmap = &cdev->pmap;
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unsigned int start;
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int idx;
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if (!pmap->max_connect) {
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pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
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cdev, csk->port_id, cdev->ports[csk->port_id]->name);
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return -EADDRNOTAVAIL;
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}
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if (csk->saddr.sin_port) {
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pr_err("source port NON-ZERO %u.\n",
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ntohs(csk->saddr.sin_port));
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return -EADDRINUSE;
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}
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spin_lock_bh(&pmap->lock);
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if (pmap->used >= pmap->max_connect) {
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spin_unlock_bh(&pmap->lock);
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pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n",
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cdev, csk->port_id, cdev->ports[csk->port_id]->name);
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return -EADDRNOTAVAIL;
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}
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start = idx = pmap->next;
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do {
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if (++idx >= pmap->max_connect)
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idx = 0;
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|
|
if (!pmap->port_csk[idx]) {
|
|
|
|
pmap->used++;
|
|
|
|
csk->saddr.sin_port =
|
|
|
|
htons(pmap->sport_base + idx);
|
|
|
|
pmap->next = idx;
|
|
|
|
pmap->port_csk[idx] = csk;
|
|
|
|
spin_unlock_bh(&pmap->lock);
|
|
|
|
cxgbi_sock_get(csk);
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK,
|
|
|
|
"cdev 0x%p, p#%u %s, p %u, %u.\n",
|
|
|
|
cdev, csk->port_id,
|
|
|
|
cdev->ports[csk->port_id]->name,
|
|
|
|
pmap->sport_base + idx, pmap->next);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
} while (idx != start);
|
|
|
|
spin_unlock_bh(&pmap->lock);
|
|
|
|
|
|
|
|
/* should not happen */
|
|
|
|
pr_warn("cdev 0x%p, p#%u %s, next %u?\n",
|
|
|
|
cdev, csk->port_id, cdev->ports[csk->port_id]->name,
|
|
|
|
pmap->next);
|
|
|
|
return -EADDRNOTAVAIL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sock_put_port(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = csk->cdev;
|
|
|
|
struct cxgbi_ports_map *pmap = &cdev->pmap;
|
|
|
|
|
|
|
|
if (csk->saddr.sin_port) {
|
|
|
|
int idx = ntohs(csk->saddr.sin_port) - pmap->sport_base;
|
|
|
|
|
|
|
|
csk->saddr.sin_port = 0;
|
|
|
|
if (idx < 0 || idx >= pmap->max_connect) {
|
|
|
|
pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
|
|
|
|
cdev, csk->port_id,
|
|
|
|
cdev->ports[csk->port_id]->name,
|
|
|
|
ntohs(csk->saddr.sin_port));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_bh(&pmap->lock);
|
|
|
|
pmap->port_csk[idx] = NULL;
|
|
|
|
pmap->used--;
|
|
|
|
spin_unlock_bh(&pmap->lock);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK,
|
|
|
|
"cdev 0x%p, p#%u %s, release %u.\n",
|
|
|
|
cdev, csk->port_id, cdev->ports[csk->port_id]->name,
|
|
|
|
pmap->sport_base + idx);
|
|
|
|
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* iscsi tcp connection
|
|
|
|
*/
|
|
|
|
void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
if (csk->cpl_close) {
|
|
|
|
kfree_skb(csk->cpl_close);
|
|
|
|
csk->cpl_close = NULL;
|
|
|
|
}
|
|
|
|
if (csk->cpl_abort_req) {
|
|
|
|
kfree_skb(csk->cpl_abort_req);
|
|
|
|
csk->cpl_abort_req = NULL;
|
|
|
|
}
|
|
|
|
if (csk->cpl_abort_rpl) {
|
|
|
|
kfree_skb(csk->cpl_abort_rpl);
|
|
|
|
csk->cpl_abort_rpl = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_free_cpl_skbs);
|
|
|
|
|
|
|
|
static struct cxgbi_sock *cxgbi_sock_create(struct cxgbi_device *cdev)
|
|
|
|
{
|
|
|
|
struct cxgbi_sock *csk = kzalloc(sizeof(*csk), GFP_NOIO);
|
|
|
|
|
|
|
|
if (!csk) {
|
|
|
|
pr_info("alloc csk %zu failed.\n", sizeof(*csk));
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cdev->csk_alloc_cpls(csk) < 0) {
|
|
|
|
pr_info("csk 0x%p, alloc cpls failed.\n", csk);
|
|
|
|
kfree(csk);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_init(&csk->lock);
|
|
|
|
kref_init(&csk->refcnt);
|
|
|
|
skb_queue_head_init(&csk->receive_queue);
|
|
|
|
skb_queue_head_init(&csk->write_queue);
|
|
|
|
setup_timer(&csk->retry_timer, NULL, (unsigned long)csk);
|
|
|
|
rwlock_init(&csk->callback_lock);
|
|
|
|
csk->cdev = cdev;
|
|
|
|
csk->flags = 0;
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CLOSED);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK, "cdev 0x%p, new csk 0x%p.\n", cdev, csk);
|
|
|
|
|
|
|
|
return csk;
|
|
|
|
}
|
|
|
|
|
2011-05-04 11:43:40 +08:00
|
|
|
static struct rtable *find_route_ipv4(struct flowi4 *fl4,
|
|
|
|
__be32 saddr, __be32 daddr,
|
2011-03-12 13:00:52 +08:00
|
|
|
__be16 sport, __be16 dport, u8 tos)
|
2010-08-17 11:55:53 +08:00
|
|
|
{
|
|
|
|
struct rtable *rt;
|
|
|
|
|
2011-05-04 11:43:40 +08:00
|
|
|
rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr,
|
2011-03-12 13:00:52 +08:00
|
|
|
dport, sport, IPPROTO_TCP, tos, 0);
|
2011-03-03 06:31:35 +08:00
|
|
|
if (IS_ERR(rt))
|
2010-08-17 11:55:53 +08:00
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return rt;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
|
|
|
|
{
|
|
|
|
struct sockaddr_in *daddr = (struct sockaddr_in *)dst_addr;
|
|
|
|
struct dst_entry *dst;
|
|
|
|
struct net_device *ndev;
|
|
|
|
struct cxgbi_device *cdev;
|
|
|
|
struct rtable *rt = NULL;
|
2011-05-04 11:43:40 +08:00
|
|
|
struct flowi4 fl4;
|
2010-08-17 11:55:53 +08:00
|
|
|
struct cxgbi_sock *csk = NULL;
|
|
|
|
unsigned int mtu = 0;
|
|
|
|
int port = 0xFFFF;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (daddr->sin_family != AF_INET) {
|
|
|
|
pr_info("address family 0x%x NOT supported.\n",
|
|
|
|
daddr->sin_family);
|
|
|
|
err = -EAFNOSUPPORT;
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
2011-05-04 11:43:40 +08:00
|
|
|
rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
|
2010-08-17 11:55:53 +08:00
|
|
|
if (!rt) {
|
|
|
|
pr_info("no route to ipv4 0x%x, port %u.\n",
|
|
|
|
daddr->sin_addr.s_addr, daddr->sin_port);
|
|
|
|
err = -ENETUNREACH;
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
dst = &rt->dst;
|
|
|
|
ndev = dst->neighbour->dev;
|
|
|
|
|
|
|
|
if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
|
|
|
|
pr_info("multi-cast route %pI4, port %u, dev %s.\n",
|
|
|
|
&daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
|
|
|
|
ndev->name);
|
|
|
|
err = -ENETUNREACH;
|
|
|
|
goto rel_rt;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ndev->flags & IFF_LOOPBACK) {
|
|
|
|
ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr);
|
|
|
|
mtu = ndev->mtu;
|
|
|
|
pr_info("rt dev %s, loopback -> %s, mtu %u.\n",
|
|
|
|
dst->neighbour->dev->name, ndev->name, mtu);
|
|
|
|
}
|
|
|
|
|
|
|
|
cdev = cxgbi_device_find_by_netdev(ndev, &port);
|
|
|
|
if (!cdev) {
|
|
|
|
pr_info("dst %pI4, %s, NOT cxgbi device.\n",
|
|
|
|
&daddr->sin_addr.s_addr, ndev->name);
|
|
|
|
err = -ENETUNREACH;
|
|
|
|
goto rel_rt;
|
|
|
|
}
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK,
|
|
|
|
"route to %pI4 :%u, ndev p#%d,%s, cdev 0x%p.\n",
|
|
|
|
&daddr->sin_addr.s_addr, ntohs(daddr->sin_port),
|
|
|
|
port, ndev->name, cdev);
|
|
|
|
|
|
|
|
csk = cxgbi_sock_create(cdev);
|
|
|
|
if (!csk) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto rel_rt;
|
|
|
|
}
|
|
|
|
csk->cdev = cdev;
|
|
|
|
csk->port_id = port;
|
|
|
|
csk->mtu = mtu;
|
|
|
|
csk->dst = dst;
|
|
|
|
csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
|
|
|
|
csk->daddr.sin_port = daddr->sin_port;
|
2011-02-17 05:04:38 +08:00
|
|
|
csk->daddr.sin_family = daddr->sin_family;
|
2011-05-04 11:43:40 +08:00
|
|
|
csk->saddr.sin_addr.s_addr = fl4.saddr;
|
2010-08-17 11:55:53 +08:00
|
|
|
|
|
|
|
return csk;
|
|
|
|
|
|
|
|
rel_rt:
|
|
|
|
ip_rt_put(rt);
|
|
|
|
if (csk)
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
err_out:
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
|
|
|
|
void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
|
|
|
|
unsigned int opt)
|
|
|
|
{
|
|
|
|
csk->write_seq = csk->snd_nxt = csk->snd_una = snd_isn;
|
|
|
|
dst_confirm(csk->dst);
|
|
|
|
smp_mb();
|
|
|
|
cxgbi_sock_set_state(csk, CTP_ESTABLISHED);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_established);
|
|
|
|
|
|
|
|
static void cxgbi_inform_iscsi_conn_closing(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK,
|
|
|
|
"csk 0x%p, state %u, flags 0x%lx, conn 0x%p.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->user_data);
|
|
|
|
|
|
|
|
if (csk->state != CTP_ESTABLISHED) {
|
2010-09-24 07:43:23 +08:00
|
|
|
read_lock_bh(&csk->callback_lock);
|
2010-08-17 11:55:53 +08:00
|
|
|
if (csk->user_data)
|
|
|
|
iscsi_conn_failure(csk->user_data,
|
|
|
|
ISCSI_ERR_CONN_FAILED);
|
2010-09-24 07:43:23 +08:00
|
|
|
read_unlock_bh(&csk->callback_lock);
|
2010-08-17 11:55:53 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void cxgbi_sock_closed(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
|
|
|
|
csk, (csk)->state, (csk)->flags, (csk)->tid);
|
|
|
|
cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
|
|
|
|
if (csk->state == CTP_ACTIVE_OPEN || csk->state == CTP_CLOSED)
|
|
|
|
return;
|
|
|
|
if (csk->saddr.sin_port)
|
|
|
|
sock_put_port(csk);
|
|
|
|
if (csk->dst)
|
|
|
|
dst_release(csk->dst);
|
|
|
|
csk->cdev->csk_release_offload_resources(csk);
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CLOSED);
|
|
|
|
cxgbi_inform_iscsi_conn_closing(csk);
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_closed);
|
|
|
|
|
|
|
|
static void need_active_close(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
int data_lost;
|
|
|
|
int close_req = 0;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
|
|
|
|
csk, (csk)->state, (csk)->flags, (csk)->tid);
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
dst_confirm(csk->dst);
|
|
|
|
data_lost = skb_queue_len(&csk->receive_queue);
|
|
|
|
__skb_queue_purge(&csk->receive_queue);
|
|
|
|
|
|
|
|
if (csk->state == CTP_ACTIVE_OPEN)
|
|
|
|
cxgbi_sock_set_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED);
|
|
|
|
else if (csk->state == CTP_ESTABLISHED) {
|
|
|
|
close_req = 1;
|
|
|
|
cxgbi_sock_set_state(csk, CTP_ACTIVE_CLOSE);
|
|
|
|
} else if (csk->state == CTP_PASSIVE_CLOSE) {
|
|
|
|
close_req = 1;
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (close_req) {
|
|
|
|
if (data_lost)
|
|
|
|
csk->cdev->csk_send_abort_req(csk);
|
|
|
|
else
|
|
|
|
csk->cdev->csk_send_close_req(csk);
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
void cxgbi_sock_fail_act_open(struct cxgbi_sock *csk, int errno)
|
|
|
|
{
|
|
|
|
pr_info("csk 0x%p,%u,%lx, %pI4:%u-%pI4:%u, err %d.\n",
|
|
|
|
csk, csk->state, csk->flags,
|
|
|
|
&csk->saddr.sin_addr.s_addr, csk->saddr.sin_port,
|
|
|
|
&csk->daddr.sin_addr.s_addr, csk->daddr.sin_port,
|
|
|
|
errno);
|
|
|
|
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CONNECTING);
|
|
|
|
csk->err = errno;
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open);
|
|
|
|
|
|
|
|
void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
|
|
|
|
csk, (csk)->state, (csk)->flags, (csk)->tid);
|
|
|
|
cxgbi_sock_get(csk);
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
if (csk->state == CTP_ACTIVE_OPEN)
|
|
|
|
cxgbi_sock_fail_act_open(csk, -EHOSTUNREACH);
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
__kfree_skb(skb);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure);
|
|
|
|
|
|
|
|
void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
cxgbi_sock_get(csk);
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
|
|
|
|
if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_RCVD))
|
|
|
|
cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD);
|
|
|
|
else {
|
|
|
|
cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_RCVD);
|
|
|
|
cxgbi_sock_clear_flag(csk, CTPF_ABORT_RPL_PENDING);
|
|
|
|
if (cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD))
|
|
|
|
pr_err("csk 0x%p,%u,0x%lx,%u,ABT_RPL_RSS.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid);
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_abort_rpl);
|
|
|
|
|
|
|
|
void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
|
|
|
|
csk, (csk)->state, (csk)->flags, (csk)->tid);
|
|
|
|
cxgbi_sock_get(csk);
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
|
|
|
|
if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
switch (csk->state) {
|
|
|
|
case CTP_ESTABLISHED:
|
|
|
|
cxgbi_sock_set_state(csk, CTP_PASSIVE_CLOSE);
|
|
|
|
break;
|
|
|
|
case CTP_ACTIVE_CLOSE:
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_2);
|
|
|
|
break;
|
|
|
|
case CTP_CLOSE_WAIT_1:
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
break;
|
|
|
|
case CTP_ABORTING:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid);
|
|
|
|
}
|
|
|
|
cxgbi_inform_iscsi_conn_closing(csk);
|
|
|
|
done:
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_peer_close);
|
|
|
|
|
|
|
|
void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *csk, u32 snd_nxt)
|
|
|
|
{
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
|
|
|
|
csk, (csk)->state, (csk)->flags, (csk)->tid);
|
|
|
|
cxgbi_sock_get(csk);
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
|
|
|
|
csk->snd_una = snd_nxt - 1;
|
|
|
|
if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING))
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
switch (csk->state) {
|
|
|
|
case CTP_ACTIVE_CLOSE:
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CLOSE_WAIT_1);
|
|
|
|
break;
|
|
|
|
case CTP_CLOSE_WAIT_1:
|
|
|
|
case CTP_CLOSE_WAIT_2:
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
break;
|
|
|
|
case CTP_ABORTING:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
pr_err("csk 0x%p,%u,0x%lx,%u, bad state.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid);
|
|
|
|
}
|
|
|
|
done:
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_close_conn_rpl);
|
|
|
|
|
|
|
|
void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *csk, unsigned int credits,
|
|
|
|
unsigned int snd_una, int seq_chk)
|
|
|
|
{
|
|
|
|
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
|
|
|
|
"csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, snd_una %u,%d.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid, credits,
|
|
|
|
csk->wr_cred, csk->wr_una_cred, snd_una, seq_chk);
|
|
|
|
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
|
|
|
|
csk->wr_cred += credits;
|
|
|
|
if (csk->wr_una_cred > csk->wr_max_cred - csk->wr_cred)
|
|
|
|
csk->wr_una_cred = csk->wr_max_cred - csk->wr_cred;
|
|
|
|
|
|
|
|
while (credits) {
|
|
|
|
struct sk_buff *p = cxgbi_sock_peek_wr(csk);
|
|
|
|
|
|
|
|
if (unlikely(!p)) {
|
|
|
|
pr_err("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, empty.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid, credits,
|
|
|
|
csk->wr_cred, csk->wr_una_cred);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (unlikely(credits < p->csum)) {
|
|
|
|
pr_warn("csk 0x%p,%u,0x%lx,%u, cr %u,%u+%u, < %u.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid,
|
|
|
|
credits, csk->wr_cred, csk->wr_una_cred,
|
|
|
|
p->csum);
|
|
|
|
p->csum -= credits;
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
cxgbi_sock_dequeue_wr(csk);
|
|
|
|
credits -= p->csum;
|
|
|
|
kfree_skb(p);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
cxgbi_sock_check_wr_invariants(csk);
|
|
|
|
|
|
|
|
if (seq_chk) {
|
|
|
|
if (unlikely(before(snd_una, csk->snd_una))) {
|
|
|
|
pr_warn("csk 0x%p,%u,0x%lx,%u, snd_una %u/%u.",
|
|
|
|
csk, csk->state, csk->flags, csk->tid, snd_una,
|
|
|
|
csk->snd_una);
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (csk->snd_una != snd_una) {
|
|
|
|
csk->snd_una = snd_una;
|
|
|
|
dst_confirm(csk->dst);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (skb_queue_len(&csk->write_queue)) {
|
|
|
|
if (csk->cdev->csk_push_tx_frames(csk, 0))
|
|
|
|
cxgbi_conn_tx_open(csk);
|
|
|
|
} else
|
|
|
|
cxgbi_conn_tx_open(csk);
|
|
|
|
done:
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_rcv_wr_ack);
|
|
|
|
|
|
|
|
static unsigned int cxgbi_sock_find_best_mtu(struct cxgbi_sock *csk,
|
|
|
|
unsigned short mtu)
|
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
while (i < csk->cdev->nmtus - 1 && csk->cdev->mtus[i + 1] <= mtu)
|
|
|
|
++i;
|
|
|
|
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *csk, unsigned int pmtu)
|
|
|
|
{
|
|
|
|
unsigned int idx;
|
|
|
|
struct dst_entry *dst = csk->dst;
|
|
|
|
|
2010-12-14 04:52:14 +08:00
|
|
|
csk->advmss = dst_metric_advmss(dst);
|
2010-08-17 11:55:53 +08:00
|
|
|
|
|
|
|
if (csk->advmss > pmtu - 40)
|
|
|
|
csk->advmss = pmtu - 40;
|
|
|
|
if (csk->advmss < csk->cdev->mtus[0] - 40)
|
|
|
|
csk->advmss = csk->cdev->mtus[0] - 40;
|
|
|
|
idx = cxgbi_sock_find_best_mtu(csk, csk->advmss + 40);
|
|
|
|
|
|
|
|
return idx;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_select_mss);
|
|
|
|
|
|
|
|
void cxgbi_sock_skb_entail(struct cxgbi_sock *csk, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
cxgbi_skcb_tcp_seq(skb) = csk->write_seq;
|
|
|
|
__skb_queue_tail(&csk->write_queue, skb);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_skb_entail);
|
|
|
|
|
|
|
|
void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
while ((skb = cxgbi_sock_dequeue_wr(csk)) != NULL)
|
|
|
|
kfree_skb(skb);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_purge_wr_queue);
|
|
|
|
|
|
|
|
void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
int pending = cxgbi_sock_count_pending_wrs(csk);
|
|
|
|
|
|
|
|
if (unlikely(csk->wr_cred + pending != csk->wr_max_cred))
|
|
|
|
pr_err("csk 0x%p, tid %u, credit %u + %u != %u.\n",
|
|
|
|
csk, csk->tid, csk->wr_cred, pending, csk->wr_max_cred);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_sock_check_wr_invariants);
|
|
|
|
|
|
|
|
static int cxgbi_sock_send_pdus(struct cxgbi_sock *csk, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = csk->cdev;
|
|
|
|
struct sk_buff *next;
|
|
|
|
int err, copied = 0;
|
|
|
|
|
|
|
|
spin_lock_bh(&csk->lock);
|
|
|
|
|
|
|
|
if (csk->state != CTP_ESTABLISHED) {
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"csk 0x%p,%u,0x%lx,%u, EAGAIN.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid);
|
|
|
|
err = -EAGAIN;
|
|
|
|
goto out_err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (csk->err) {
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"csk 0x%p,%u,0x%lx,%u, EPIPE %d.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid, csk->err);
|
|
|
|
err = -EPIPE;
|
|
|
|
goto out_err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (csk->write_seq - csk->snd_una >= cdev->snd_win) {
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"csk 0x%p,%u,0x%lx,%u, FULL %u-%u >= %u.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid, csk->write_seq,
|
|
|
|
csk->snd_una, cdev->snd_win);
|
|
|
|
err = -ENOBUFS;
|
|
|
|
goto out_err;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (skb) {
|
|
|
|
int frags = skb_shinfo(skb)->nr_frags +
|
|
|
|
(skb->len != skb->data_len);
|
|
|
|
|
|
|
|
if (unlikely(skb_headroom(skb) < cdev->skb_tx_rsvd)) {
|
|
|
|
pr_err("csk 0x%p, skb head %u < %u.\n",
|
|
|
|
csk, skb_headroom(skb), cdev->skb_tx_rsvd);
|
|
|
|
err = -EINVAL;
|
|
|
|
goto out_err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (frags >= SKB_WR_LIST_SIZE) {
|
|
|
|
pr_err("csk 0x%p, frags %d, %u,%u >%u.\n",
|
|
|
|
csk, skb_shinfo(skb)->nr_frags, skb->len,
|
|
|
|
skb->data_len, (uint)(SKB_WR_LIST_SIZE));
|
|
|
|
err = -EINVAL;
|
|
|
|
goto out_err;
|
|
|
|
}
|
|
|
|
|
|
|
|
next = skb->next;
|
|
|
|
skb->next = NULL;
|
|
|
|
cxgbi_skcb_set_flag(skb, SKCBF_TX_NEED_HDR);
|
|
|
|
cxgbi_sock_skb_entail(csk, skb);
|
|
|
|
copied += skb->len;
|
|
|
|
csk->write_seq += skb->len +
|
|
|
|
cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
|
|
|
|
skb = next;
|
|
|
|
}
|
|
|
|
done:
|
|
|
|
if (likely(skb_queue_len(&csk->write_queue)))
|
|
|
|
cdev->csk_push_tx_frames(csk, 1);
|
|
|
|
spin_unlock_bh(&csk->lock);
|
|
|
|
return copied;
|
|
|
|
|
|
|
|
out_err:
|
|
|
|
if (copied == 0 && err == -EPIPE)
|
|
|
|
copied = csk->err ? csk->err : -EPIPE;
|
|
|
|
else
|
|
|
|
copied = err;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Direct Data Placement -
|
|
|
|
* Directly place the iSCSI Data-In or Data-Out PDU's payload into pre-posted
|
|
|
|
* final destination host-memory buffers based on the Initiator Task Tag (ITT)
|
|
|
|
* in Data-In or Target Task Tag (TTT) in Data-Out PDUs.
|
|
|
|
* The host memory address is programmed into h/w in the format of pagepod
|
|
|
|
* entries.
|
|
|
|
* The location of the pagepod entry is encoded into ddp tag which is used as
|
|
|
|
* the base for ITT/TTT.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4};
|
|
|
|
static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16};
|
|
|
|
static unsigned char page_idx = DDP_PGIDX_MAX;
|
|
|
|
|
|
|
|
static unsigned char sw_tag_idx_bits;
|
|
|
|
static unsigned char sw_tag_age_bits;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Direct-Data Placement page size adjustment
|
|
|
|
*/
|
|
|
|
static int ddp_adjust_page_table(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
unsigned int base_order, order;
|
|
|
|
|
|
|
|
if (PAGE_SIZE < (1UL << ddp_page_shift[0])) {
|
|
|
|
pr_info("PAGE_SIZE 0x%lx too small, min 0x%lx\n",
|
|
|
|
PAGE_SIZE, 1UL << ddp_page_shift[0]);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
base_order = get_order(1UL << ddp_page_shift[0]);
|
|
|
|
order = get_order(1UL << PAGE_SHIFT);
|
|
|
|
|
|
|
|
for (i = 0; i < DDP_PGIDX_MAX; i++) {
|
|
|
|
/* first is the kernel page size, then just doubling */
|
|
|
|
ddp_page_order[i] = order - base_order + i;
|
|
|
|
ddp_page_shift[i] = PAGE_SHIFT + i;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ddp_find_page_index(unsigned long pgsz)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < DDP_PGIDX_MAX; i++) {
|
|
|
|
if (pgsz == (1UL << ddp_page_shift[i]))
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
pr_info("ddp page size %lu not supported.\n", pgsz);
|
|
|
|
return DDP_PGIDX_MAX;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ddp_setup_host_page_size(void)
|
|
|
|
{
|
|
|
|
if (page_idx == DDP_PGIDX_MAX) {
|
|
|
|
page_idx = ddp_find_page_index(PAGE_SIZE);
|
|
|
|
|
|
|
|
if (page_idx == DDP_PGIDX_MAX) {
|
|
|
|
pr_info("system PAGE %lu, update hw.\n", PAGE_SIZE);
|
|
|
|
if (ddp_adjust_page_table() < 0) {
|
|
|
|
pr_info("PAGE %lu, disable ddp.\n", PAGE_SIZE);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
page_idx = ddp_find_page_index(PAGE_SIZE);
|
|
|
|
}
|
|
|
|
pr_info("system PAGE %lu, ddp idx %u.\n", PAGE_SIZE, page_idx);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void cxgbi_ddp_page_size_factor(int *pgsz_factor)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < DDP_PGIDX_MAX; i++)
|
|
|
|
pgsz_factor[i] = ddp_page_order[i];
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ddp_page_size_factor);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DDP setup & teardown
|
|
|
|
*/
|
|
|
|
|
|
|
|
void cxgbi_ddp_ppod_set(struct cxgbi_pagepod *ppod,
|
|
|
|
struct cxgbi_pagepod_hdr *hdr,
|
|
|
|
struct cxgbi_gather_list *gl, unsigned int gidx)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
memcpy(ppod, hdr, sizeof(*hdr));
|
|
|
|
for (i = 0; i < (PPOD_PAGES_MAX + 1); i++, gidx++) {
|
|
|
|
ppod->addr[i] = gidx < gl->nelem ?
|
|
|
|
cpu_to_be64(gl->phys_addr[gidx]) : 0ULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_set);
|
|
|
|
|
|
|
|
void cxgbi_ddp_ppod_clear(struct cxgbi_pagepod *ppod)
|
|
|
|
{
|
|
|
|
memset(ppod, 0, sizeof(*ppod));
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ddp_ppod_clear);
|
|
|
|
|
|
|
|
static inline int ddp_find_unused_entries(struct cxgbi_ddp_info *ddp,
|
|
|
|
unsigned int start, unsigned int max,
|
|
|
|
unsigned int count,
|
|
|
|
struct cxgbi_gather_list *gl)
|
|
|
|
{
|
|
|
|
unsigned int i, j, k;
|
|
|
|
|
|
|
|
/* not enough entries */
|
|
|
|
if ((max - start) < count) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"NOT enough entries %u+%u < %u.\n", start, count, max);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
max -= count;
|
|
|
|
spin_lock(&ddp->map_lock);
|
|
|
|
for (i = start; i < max;) {
|
|
|
|
for (j = 0, k = i; j < count; j++, k++) {
|
|
|
|
if (ddp->gl_map[k])
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (j == count) {
|
|
|
|
for (j = 0, k = i; j < count; j++, k++)
|
|
|
|
ddp->gl_map[k] = gl;
|
|
|
|
spin_unlock(&ddp->map_lock);
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
i += j + 1;
|
|
|
|
}
|
|
|
|
spin_unlock(&ddp->map_lock);
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"NO suitable entries %u available.\n", count);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void ddp_unmark_entries(struct cxgbi_ddp_info *ddp,
|
|
|
|
int start, int count)
|
|
|
|
{
|
|
|
|
spin_lock(&ddp->map_lock);
|
|
|
|
memset(&ddp->gl_map[start], 0,
|
|
|
|
count * sizeof(struct cxgbi_gather_list *));
|
|
|
|
spin_unlock(&ddp->map_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void ddp_gl_unmap(struct pci_dev *pdev,
|
|
|
|
struct cxgbi_gather_list *gl)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < gl->nelem; i++)
|
|
|
|
dma_unmap_page(&pdev->dev, gl->phys_addr[i], PAGE_SIZE,
|
|
|
|
PCI_DMA_FROMDEVICE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ddp_gl_map(struct pci_dev *pdev,
|
|
|
|
struct cxgbi_gather_list *gl)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < gl->nelem; i++) {
|
|
|
|
gl->phys_addr[i] = dma_map_page(&pdev->dev, gl->pages[i], 0,
|
|
|
|
PAGE_SIZE,
|
|
|
|
PCI_DMA_FROMDEVICE);
|
|
|
|
if (unlikely(dma_mapping_error(&pdev->dev, gl->phys_addr[i]))) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"page %d 0x%p, 0x%p dma mapping err.\n",
|
|
|
|
i, gl->pages[i], pdev);
|
|
|
|
goto unmap;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return i;
|
|
|
|
unmap:
|
|
|
|
if (i) {
|
|
|
|
unsigned int nelem = gl->nelem;
|
|
|
|
|
|
|
|
gl->nelem = i;
|
|
|
|
ddp_gl_unmap(pdev, gl);
|
|
|
|
gl->nelem = nelem;
|
|
|
|
}
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ddp_release_gl(struct cxgbi_gather_list *gl,
|
|
|
|
struct pci_dev *pdev)
|
|
|
|
{
|
|
|
|
ddp_gl_unmap(pdev, gl);
|
|
|
|
kfree(gl);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct cxgbi_gather_list *ddp_make_gl(unsigned int xferlen,
|
|
|
|
struct scatterlist *sgl,
|
|
|
|
unsigned int sgcnt,
|
|
|
|
struct pci_dev *pdev,
|
|
|
|
gfp_t gfp)
|
|
|
|
{
|
|
|
|
struct cxgbi_gather_list *gl;
|
|
|
|
struct scatterlist *sg = sgl;
|
|
|
|
struct page *sgpage = sg_page(sg);
|
|
|
|
unsigned int sglen = sg->length;
|
|
|
|
unsigned int sgoffset = sg->offset;
|
|
|
|
unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >>
|
|
|
|
PAGE_SHIFT;
|
|
|
|
int i = 1, j = 0;
|
|
|
|
|
|
|
|
if (xferlen < DDP_THRESHOLD) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"xfer %u < threshold %u, no ddp.\n",
|
|
|
|
xferlen, DDP_THRESHOLD);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
gl = kzalloc(sizeof(struct cxgbi_gather_list) +
|
|
|
|
npages * (sizeof(dma_addr_t) +
|
|
|
|
sizeof(struct page *)), gfp);
|
|
|
|
if (!gl) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"xfer %u, %u pages, OOM.\n", xferlen, npages);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"xfer %u, sgl %u, gl max %u.\n", xferlen, sgcnt, npages);
|
|
|
|
|
|
|
|
gl->pages = (struct page **)&gl->phys_addr[npages];
|
|
|
|
gl->nelem = npages;
|
|
|
|
gl->length = xferlen;
|
|
|
|
gl->offset = sgoffset;
|
|
|
|
gl->pages[0] = sgpage;
|
|
|
|
|
|
|
|
for (i = 1, sg = sg_next(sgl), j = 0; i < sgcnt;
|
|
|
|
i++, sg = sg_next(sg)) {
|
|
|
|
struct page *page = sg_page(sg);
|
|
|
|
|
|
|
|
if (sgpage == page && sg->offset == sgoffset + sglen)
|
|
|
|
sglen += sg->length;
|
|
|
|
else {
|
|
|
|
/* make sure the sgl is fit for ddp:
|
|
|
|
* each has the same page size, and
|
|
|
|
* all of the middle pages are used completely
|
|
|
|
*/
|
|
|
|
if ((j && sgoffset) || ((i != sgcnt - 1) &&
|
|
|
|
((sglen + sgoffset) & ~PAGE_MASK))) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"page %d/%u, %u + %u.\n",
|
|
|
|
i, sgcnt, sgoffset, sglen);
|
|
|
|
goto error_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
j++;
|
|
|
|
if (j == gl->nelem || sg->offset) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"page %d/%u, offset %u.\n",
|
|
|
|
j, gl->nelem, sg->offset);
|
|
|
|
goto error_out;
|
|
|
|
}
|
|
|
|
gl->pages[j] = page;
|
|
|
|
sglen = sg->length;
|
|
|
|
sgoffset = sg->offset;
|
|
|
|
sgpage = page;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
gl->nelem = ++j;
|
|
|
|
|
|
|
|
if (ddp_gl_map(pdev, gl) < 0)
|
|
|
|
goto error_out;
|
|
|
|
|
|
|
|
return gl;
|
|
|
|
|
|
|
|
error_out:
|
|
|
|
kfree(gl);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ddp_tag_release(struct cxgbi_hba *chba, u32 tag)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = chba->cdev;
|
|
|
|
struct cxgbi_ddp_info *ddp = cdev->ddp;
|
|
|
|
u32 idx;
|
|
|
|
|
|
|
|
idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask;
|
|
|
|
if (idx < ddp->nppods) {
|
|
|
|
struct cxgbi_gather_list *gl = ddp->gl_map[idx];
|
|
|
|
unsigned int npods;
|
|
|
|
|
|
|
|
if (!gl || !gl->nelem) {
|
|
|
|
pr_warn("tag 0x%x, idx %u, gl 0x%p, %u.\n",
|
|
|
|
tag, idx, gl, gl ? gl->nelem : 0);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"tag 0x%x, release idx %u, npods %u.\n",
|
|
|
|
tag, idx, npods);
|
|
|
|
cdev->csk_ddp_clear(chba, tag, idx, npods);
|
|
|
|
ddp_unmark_entries(ddp, idx, npods);
|
|
|
|
ddp_release_gl(gl, ddp->pdev);
|
|
|
|
} else
|
|
|
|
pr_warn("tag 0x%x, idx %u > max %u.\n", tag, idx, ddp->nppods);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ddp_tag_reserve(struct cxgbi_sock *csk, unsigned int tid,
|
|
|
|
u32 sw_tag, u32 *tagp, struct cxgbi_gather_list *gl,
|
|
|
|
gfp_t gfp)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = csk->cdev;
|
|
|
|
struct cxgbi_ddp_info *ddp = cdev->ddp;
|
|
|
|
struct cxgbi_tag_format *tformat = &cdev->tag_format;
|
|
|
|
struct cxgbi_pagepod_hdr hdr;
|
|
|
|
unsigned int npods;
|
|
|
|
int idx = -1;
|
|
|
|
int err = -ENOMEM;
|
|
|
|
u32 tag;
|
|
|
|
|
|
|
|
npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
|
|
|
|
if (ddp->idx_last == ddp->nppods)
|
|
|
|
idx = ddp_find_unused_entries(ddp, 0, ddp->nppods,
|
|
|
|
npods, gl);
|
|
|
|
else {
|
|
|
|
idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1,
|
|
|
|
ddp->nppods, npods,
|
|
|
|
gl);
|
|
|
|
if (idx < 0 && ddp->idx_last >= npods) {
|
|
|
|
idx = ddp_find_unused_entries(ddp, 0,
|
|
|
|
min(ddp->idx_last + npods, ddp->nppods),
|
|
|
|
npods, gl);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (idx < 0) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"xferlen %u, gl %u, npods %u NO DDP.\n",
|
|
|
|
gl->length, gl->nelem, npods);
|
|
|
|
return idx;
|
|
|
|
}
|
|
|
|
|
|
|
|
tag = cxgbi_ddp_tag_base(tformat, sw_tag);
|
|
|
|
tag |= idx << PPOD_IDX_SHIFT;
|
|
|
|
|
|
|
|
hdr.rsvd = 0;
|
|
|
|
hdr.vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid));
|
|
|
|
hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask);
|
|
|
|
hdr.max_offset = htonl(gl->length);
|
|
|
|
hdr.page_offset = htonl(gl->offset);
|
|
|
|
|
|
|
|
err = cdev->csk_ddp_set(csk, &hdr, idx, npods, gl);
|
2011-01-08 06:45:39 +08:00
|
|
|
if (err < 0)
|
2010-08-17 11:55:53 +08:00
|
|
|
goto unmark_entries;
|
|
|
|
|
|
|
|
ddp->idx_last = idx;
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"xfer %u, gl %u,%u, tid 0x%x, tag 0x%x->0x%x(%u,%u).\n",
|
|
|
|
gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, idx,
|
|
|
|
npods);
|
|
|
|
*tagp = tag;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unmark_entries:
|
|
|
|
ddp_unmark_entries(ddp, idx, npods);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
int cxgbi_ddp_reserve(struct cxgbi_sock *csk, unsigned int *tagp,
|
|
|
|
unsigned int sw_tag, unsigned int xferlen,
|
|
|
|
struct scatterlist *sgl, unsigned int sgcnt, gfp_t gfp)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = csk->cdev;
|
|
|
|
struct cxgbi_tag_format *tformat = &cdev->tag_format;
|
|
|
|
struct cxgbi_gather_list *gl;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (page_idx >= DDP_PGIDX_MAX || !cdev->ddp ||
|
|
|
|
xferlen < DDP_THRESHOLD) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"pgidx %u, xfer %u, NO ddp.\n", page_idx, xferlen);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!cxgbi_sw_tag_usable(tformat, sw_tag)) {
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"sw_tag 0x%x NOT usable.\n", sw_tag);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
gl = ddp_make_gl(xferlen, sgl, sgcnt, cdev->pdev, gfp);
|
|
|
|
if (!gl)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
err = ddp_tag_reserve(csk, csk->tid, sw_tag, tagp, gl, gfp);
|
|
|
|
if (err < 0)
|
|
|
|
ddp_release_gl(gl, cdev->pdev);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ddp_destroy(struct kref *kref)
|
|
|
|
{
|
|
|
|
struct cxgbi_ddp_info *ddp = container_of(kref,
|
|
|
|
struct cxgbi_ddp_info,
|
|
|
|
refcnt);
|
|
|
|
struct cxgbi_device *cdev = ddp->cdev;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
pr_info("kref 0, destroy ddp 0x%p, cdev 0x%p.\n", ddp, cdev);
|
|
|
|
|
|
|
|
while (i < ddp->nppods) {
|
|
|
|
struct cxgbi_gather_list *gl = ddp->gl_map[i];
|
|
|
|
|
|
|
|
if (gl) {
|
|
|
|
int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
|
|
|
|
>> PPOD_PAGES_SHIFT;
|
|
|
|
pr_info("cdev 0x%p, ddp %d + %d.\n", cdev, i, npods);
|
|
|
|
kfree(gl);
|
|
|
|
i += npods;
|
|
|
|
} else
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
cxgbi_free_big_mem(ddp);
|
|
|
|
}
|
|
|
|
|
|
|
|
int cxgbi_ddp_cleanup(struct cxgbi_device *cdev)
|
|
|
|
{
|
|
|
|
struct cxgbi_ddp_info *ddp = cdev->ddp;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"cdev 0x%p, release ddp 0x%p.\n", cdev, ddp);
|
|
|
|
cdev->ddp = NULL;
|
|
|
|
if (ddp)
|
|
|
|
return kref_put(&ddp->refcnt, ddp_destroy);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ddp_cleanup);
|
|
|
|
|
|
|
|
int cxgbi_ddp_init(struct cxgbi_device *cdev,
|
|
|
|
unsigned int llimit, unsigned int ulimit,
|
|
|
|
unsigned int max_txsz, unsigned int max_rxsz)
|
|
|
|
{
|
|
|
|
struct cxgbi_ddp_info *ddp;
|
|
|
|
unsigned int ppmax, bits;
|
|
|
|
|
|
|
|
ppmax = (ulimit - llimit + 1) >> PPOD_SIZE_SHIFT;
|
|
|
|
bits = __ilog2_u32(ppmax) + 1;
|
|
|
|
if (bits > PPOD_IDX_MAX_SIZE)
|
|
|
|
bits = PPOD_IDX_MAX_SIZE;
|
|
|
|
ppmax = (1 << (bits - 1)) - 1;
|
|
|
|
|
|
|
|
ddp = cxgbi_alloc_big_mem(sizeof(struct cxgbi_ddp_info) +
|
|
|
|
ppmax * (sizeof(struct cxgbi_gather_list *) +
|
|
|
|
sizeof(struct sk_buff *)),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!ddp) {
|
|
|
|
pr_warn("cdev 0x%p, ddp ppmax %u OOM.\n", cdev, ppmax);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
ddp->gl_map = (struct cxgbi_gather_list **)(ddp + 1);
|
|
|
|
cdev->ddp = ddp;
|
|
|
|
|
|
|
|
spin_lock_init(&ddp->map_lock);
|
|
|
|
kref_init(&ddp->refcnt);
|
|
|
|
|
|
|
|
ddp->cdev = cdev;
|
|
|
|
ddp->pdev = cdev->pdev;
|
|
|
|
ddp->llimit = llimit;
|
|
|
|
ddp->ulimit = ulimit;
|
|
|
|
ddp->max_txsz = min_t(unsigned int, max_txsz, ULP2_MAX_PKT_SIZE);
|
|
|
|
ddp->max_rxsz = min_t(unsigned int, max_rxsz, ULP2_MAX_PKT_SIZE);
|
|
|
|
ddp->nppods = ppmax;
|
|
|
|
ddp->idx_last = ppmax;
|
|
|
|
ddp->idx_bits = bits;
|
|
|
|
ddp->idx_mask = (1 << bits) - 1;
|
|
|
|
ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1;
|
|
|
|
|
|
|
|
cdev->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits;
|
|
|
|
cdev->tag_format.rsvd_bits = ddp->idx_bits;
|
|
|
|
cdev->tag_format.rsvd_shift = PPOD_IDX_SHIFT;
|
|
|
|
cdev->tag_format.rsvd_mask = (1 << cdev->tag_format.rsvd_bits) - 1;
|
|
|
|
|
|
|
|
pr_info("%s tag format, sw %u, rsvd %u,%u, mask 0x%x.\n",
|
|
|
|
cdev->ports[0]->name, cdev->tag_format.sw_bits,
|
|
|
|
cdev->tag_format.rsvd_bits, cdev->tag_format.rsvd_shift,
|
|
|
|
cdev->tag_format.rsvd_mask);
|
|
|
|
|
|
|
|
cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
|
|
|
|
ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
|
|
|
|
cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
|
|
|
|
ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"%s max payload size: %u/%u, %u/%u.\n",
|
|
|
|
cdev->ports[0]->name, cdev->tx_max_size, ddp->max_txsz,
|
|
|
|
cdev->rx_max_size, ddp->max_rxsz);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ddp_init);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* APIs interacting with open-iscsi libraries
|
|
|
|
*/
|
|
|
|
|
|
|
|
static unsigned char padding[4];
|
|
|
|
|
|
|
|
static void task_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 cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct cxgbi_hba *chba = cconn->chba;
|
|
|
|
struct cxgbi_tag_format *tformat = &chba->cdev->tag_format;
|
|
|
|
u32 tag = ntohl((__force u32)hdr_itt);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"cdev 0x%p, release tag 0x%x.\n", chba->cdev, tag);
|
|
|
|
if (sc &&
|
|
|
|
(scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) &&
|
|
|
|
cxgbi_is_ddp_tag(tformat, tag))
|
|
|
|
ddp_tag_release(chba, tag);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int task_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 cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct cxgbi_hba *chba = cconn->chba;
|
|
|
|
struct cxgbi_tag_format *tformat = &chba->cdev->tag_format;
|
|
|
|
u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt;
|
|
|
|
u32 tag = 0;
|
|
|
|
int err = -EINVAL;
|
|
|
|
|
|
|
|
if (sc &&
|
|
|
|
(scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE)) {
|
|
|
|
err = cxgbi_ddp_reserve(cconn->cep->csk, &tag, sw_tag,
|
|
|
|
scsi_in(sc)->length,
|
|
|
|
scsi_in(sc)->table.sgl,
|
|
|
|
scsi_in(sc)->table.nents,
|
|
|
|
GFP_ATOMIC);
|
|
|
|
if (err < 0)
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"csk 0x%p, R task 0x%p, %u,%u, no ddp.\n",
|
|
|
|
cconn->cep->csk, task, scsi_in(sc)->length,
|
|
|
|
scsi_in(sc)->table.nents);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (err < 0)
|
|
|
|
tag = cxgbi_set_non_ddp_tag(tformat, sw_tag);
|
|
|
|
/* the itt need to sent in big-endian order */
|
|
|
|
*hdr_itt = (__force itt_t)htonl(tag);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n",
|
|
|
|
chba->cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
|
|
|
|
struct cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct cxgbi_device *cdev = cconn->chba->cdev;
|
|
|
|
u32 tag = ntohl((__force u32) itt);
|
|
|
|
u32 sw_bits;
|
|
|
|
|
|
|
|
sw_bits = cxgbi_tag_nonrsvd_bits(&cdev->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;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_DDP,
|
|
|
|
"cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n",
|
|
|
|
cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF,
|
|
|
|
age ? *age : 0xFF);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt);
|
|
|
|
|
|
|
|
void cxgbi_conn_tx_open(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
struct iscsi_conn *conn = csk->user_data;
|
|
|
|
|
|
|
|
if (conn) {
|
|
|
|
log_debug(1 << CXGBI_DBG_SOCK,
|
|
|
|
"csk 0x%p, cid %d.\n", csk, conn->id);
|
|
|
|
iscsi_conn_queue_work(conn);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_conn_tx_open);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* pdu receive, interact with libiscsi_tcp
|
|
|
|
*/
|
|
|
|
static inline int read_pdu_skb(struct iscsi_conn *conn,
|
|
|
|
struct sk_buff *skb,
|
|
|
|
unsigned int offset,
|
|
|
|
int offloaded)
|
|
|
|
{
|
|
|
|
int status = 0;
|
|
|
|
int bytes_read;
|
|
|
|
|
|
|
|
bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status);
|
|
|
|
switch (status) {
|
|
|
|
case ISCSI_TCP_CONN_ERR:
|
|
|
|
pr_info("skb 0x%p, off %u, %d, TCP_ERR.\n",
|
|
|
|
skb, offset, offloaded);
|
|
|
|
return -EIO;
|
|
|
|
case ISCSI_TCP_SUSPENDED:
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"skb 0x%p, off %u, %d, TCP_SUSPEND, rc %d.\n",
|
|
|
|
skb, offset, offloaded, bytes_read);
|
|
|
|
/* no transfer - just have caller flush queue */
|
|
|
|
return bytes_read;
|
|
|
|
case ISCSI_TCP_SKB_DONE:
|
|
|
|
pr_info("skb 0x%p, off %u, %d, TCP_SKB_DONE.\n",
|
|
|
|
skb, offset, offloaded);
|
|
|
|
/*
|
|
|
|
* pdus should always fit in the skb and we should get
|
|
|
|
* segment done notifcation.
|
|
|
|
*/
|
|
|
|
iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb.");
|
|
|
|
return -EFAULT;
|
|
|
|
case ISCSI_TCP_SEGMENT_DONE:
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"skb 0x%p, off %u, %d, TCP_SEG_DONE, rc %d.\n",
|
|
|
|
skb, offset, offloaded, bytes_read);
|
|
|
|
return bytes_read;
|
|
|
|
default:
|
|
|
|
pr_info("skb 0x%p, off %u, %d, invalid status %d.\n",
|
|
|
|
skb, offset, offloaded, status);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
|
|
|
|
conn, skb, skb->len, cxgbi_skcb_flags(skb));
|
|
|
|
|
|
|
|
if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) {
|
|
|
|
pr_info("conn 0x%p, skb 0x%p, not hdr.\n", conn, skb);
|
|
|
|
iscsi_conn_failure(conn, ISCSI_ERR_PROTO);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (conn->hdrdgst_en &&
|
|
|
|
cxgbi_skcb_test_flag(skb, SKCBF_RX_HCRC_ERR)) {
|
|
|
|
pr_info("conn 0x%p, skb 0x%p, hcrc.\n", conn, skb);
|
|
|
|
iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
return read_pdu_skb(conn, skb, 0, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int skb_read_pdu_data(struct iscsi_conn *conn, struct sk_buff *lskb,
|
|
|
|
struct sk_buff *skb, unsigned int offset)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
|
|
|
|
bool offloaded = 0;
|
|
|
|
int opcode = tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"conn 0x%p, skb 0x%p, len %u, flag 0x%lx.\n",
|
|
|
|
conn, skb, skb->len, cxgbi_skcb_flags(skb));
|
|
|
|
|
|
|
|
if (conn->datadgst_en &&
|
|
|
|
cxgbi_skcb_test_flag(lskb, SKCBF_RX_DCRC_ERR)) {
|
|
|
|
pr_info("conn 0x%p, skb 0x%p, dcrc 0x%lx.\n",
|
|
|
|
conn, lskb, cxgbi_skcb_flags(lskb));
|
|
|
|
iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_tcp_recv_segment_is_hdr(tcp_conn))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* coalesced, add header digest length */
|
|
|
|
if (lskb == skb && conn->hdrdgst_en)
|
|
|
|
offset += ISCSI_DIGEST_SIZE;
|
|
|
|
|
|
|
|
if (cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA_DDPD))
|
|
|
|
offloaded = 1;
|
|
|
|
|
|
|
|
if (opcode == ISCSI_OP_SCSI_DATA_IN)
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"skb 0x%p, op 0x%x, itt 0x%x, %u %s ddp'ed.\n",
|
|
|
|
skb, opcode, ntohl(tcp_conn->in.hdr->itt),
|
|
|
|
tcp_conn->in.datalen, offloaded ? "is" : "not");
|
|
|
|
|
|
|
|
return read_pdu_skb(conn, skb, offset, offloaded);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = csk->cdev;
|
|
|
|
int must_send;
|
|
|
|
u32 credits;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"csk 0x%p,%u,0x%lu,%u, seq %u, wup %u, thre %u, %u.\n",
|
|
|
|
csk, csk->state, csk->flags, csk->tid, csk->copied_seq,
|
|
|
|
csk->rcv_wup, cdev->rx_credit_thres,
|
|
|
|
cdev->rcv_win);
|
|
|
|
|
|
|
|
if (csk->state != CTP_ESTABLISHED)
|
|
|
|
return;
|
|
|
|
|
|
|
|
credits = csk->copied_seq - csk->rcv_wup;
|
|
|
|
if (unlikely(!credits))
|
|
|
|
return;
|
|
|
|
if (unlikely(cdev->rx_credit_thres == 0))
|
|
|
|
return;
|
|
|
|
|
|
|
|
must_send = credits + 16384 >= cdev->rcv_win;
|
|
|
|
if (must_send || credits >= cdev->rx_credit_thres)
|
|
|
|
csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits);
|
|
|
|
}
|
|
|
|
|
|
|
|
void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk)
|
|
|
|
{
|
|
|
|
struct cxgbi_device *cdev = csk->cdev;
|
|
|
|
struct iscsi_conn *conn = csk->user_data;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
unsigned int read = 0;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"csk 0x%p, conn 0x%p.\n", csk, conn);
|
|
|
|
|
|
|
|
if (unlikely(!conn || conn->suspend_rx)) {
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n",
|
|
|
|
csk, conn, conn ? conn->id : 0xFF,
|
|
|
|
conn ? conn->suspend_rx : 0xFF);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (!err) {
|
|
|
|
skb = skb_peek(&csk->receive_queue);
|
|
|
|
if (!skb ||
|
|
|
|
!(cxgbi_skcb_test_flag(skb, SKCBF_RX_STATUS))) {
|
|
|
|
if (skb)
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"skb 0x%p, NOT ready 0x%lx.\n",
|
|
|
|
skb, cxgbi_skcb_flags(skb));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
__skb_unlink(skb, &csk->receive_queue);
|
|
|
|
|
|
|
|
read += cxgbi_skcb_rx_pdulen(skb);
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX,
|
|
|
|
"csk 0x%p, skb 0x%p,%u,f 0x%lx, pdu len %u.\n",
|
|
|
|
csk, skb, skb->len, cxgbi_skcb_flags(skb),
|
|
|
|
cxgbi_skcb_rx_pdulen(skb));
|
|
|
|
|
|
|
|
if (cxgbi_skcb_test_flag(skb, SKCBF_RX_COALESCED)) {
|
|
|
|
err = skb_read_pdu_bhs(conn, skb);
|
2010-09-24 07:43:23 +08:00
|
|
|
if (err < 0) {
|
|
|
|
pr_err("coalesced bhs, csk 0x%p, skb 0x%p,%u, "
|
|
|
|
"f 0x%lx, plen %u.\n",
|
|
|
|
csk, skb, skb->len,
|
|
|
|
cxgbi_skcb_flags(skb),
|
|
|
|
cxgbi_skcb_rx_pdulen(skb));
|
|
|
|
goto skb_done;
|
|
|
|
}
|
2010-08-17 11:55:53 +08:00
|
|
|
err = skb_read_pdu_data(conn, skb, skb,
|
|
|
|
err + cdev->skb_rx_extra);
|
2010-09-24 07:43:23 +08:00
|
|
|
if (err < 0)
|
|
|
|
pr_err("coalesced data, csk 0x%p, skb 0x%p,%u, "
|
|
|
|
"f 0x%lx, plen %u.\n",
|
|
|
|
csk, skb, skb->len,
|
|
|
|
cxgbi_skcb_flags(skb),
|
|
|
|
cxgbi_skcb_rx_pdulen(skb));
|
2010-08-17 11:55:53 +08:00
|
|
|
} else {
|
|
|
|
err = skb_read_pdu_bhs(conn, skb);
|
2010-09-24 07:43:23 +08:00
|
|
|
if (err < 0) {
|
|
|
|
pr_err("bhs, csk 0x%p, skb 0x%p,%u, "
|
|
|
|
"f 0x%lx, plen %u.\n",
|
|
|
|
csk, skb, skb->len,
|
|
|
|
cxgbi_skcb_flags(skb),
|
|
|
|
cxgbi_skcb_rx_pdulen(skb));
|
|
|
|
goto skb_done;
|
|
|
|
}
|
|
|
|
|
2010-08-17 11:55:53 +08:00
|
|
|
if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
|
|
|
|
struct sk_buff *dskb;
|
|
|
|
|
|
|
|
dskb = skb_peek(&csk->receive_queue);
|
|
|
|
if (!dskb) {
|
2010-09-24 07:43:23 +08:00
|
|
|
pr_err("csk 0x%p, skb 0x%p,%u, f 0x%lx,"
|
|
|
|
" plen %u, NO data.\n",
|
|
|
|
csk, skb, skb->len,
|
|
|
|
cxgbi_skcb_flags(skb),
|
|
|
|
cxgbi_skcb_rx_pdulen(skb));
|
|
|
|
err = -EIO;
|
|
|
|
goto skb_done;
|
2010-08-17 11:55:53 +08:00
|
|
|
}
|
|
|
|
__skb_unlink(dskb, &csk->receive_queue);
|
|
|
|
|
|
|
|
err = skb_read_pdu_data(conn, skb, dskb, 0);
|
2010-09-24 07:43:23 +08:00
|
|
|
if (err < 0)
|
|
|
|
pr_err("data, csk 0x%p, skb 0x%p,%u, "
|
|
|
|
"f 0x%lx, plen %u, dskb 0x%p,"
|
|
|
|
"%u.\n",
|
|
|
|
csk, skb, skb->len,
|
|
|
|
cxgbi_skcb_flags(skb),
|
|
|
|
cxgbi_skcb_rx_pdulen(skb),
|
|
|
|
dskb, dskb->len);
|
2010-08-17 11:55:53 +08:00
|
|
|
__kfree_skb(dskb);
|
|
|
|
} else
|
|
|
|
err = skb_read_pdu_data(conn, skb, skb, 0);
|
|
|
|
}
|
2010-09-24 07:43:23 +08:00
|
|
|
skb_done:
|
|
|
|
__kfree_skb(skb);
|
|
|
|
|
2010-08-17 11:55:53 +08:00
|
|
|
if (err < 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, read %u.\n", csk, read);
|
|
|
|
if (read) {
|
|
|
|
csk->copied_seq += read;
|
|
|
|
csk_return_rx_credits(csk, read);
|
|
|
|
conn->rxdata_octets += read;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (err < 0) {
|
2010-09-24 07:43:23 +08:00
|
|
|
pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n",
|
|
|
|
csk, conn, err, read);
|
2010-08-17 11:55:53 +08:00
|
|
|
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_conn_pdu_ready);
|
|
|
|
|
|
|
|
static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt,
|
|
|
|
unsigned int offset, unsigned int *off,
|
|
|
|
struct scatterlist **sgp)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct scatterlist *sg;
|
|
|
|
|
|
|
|
for_each_sg(sgl, sg, sgcnt, i) {
|
|
|
|
if (offset < sg->length) {
|
|
|
|
*off = offset;
|
|
|
|
*sgp = sg;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
offset -= sg->length;
|
|
|
|
}
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset,
|
|
|
|
unsigned int dlen, skb_frag_t *frags,
|
|
|
|
int frag_max)
|
|
|
|
{
|
|
|
|
unsigned int datalen = dlen;
|
|
|
|
unsigned int sglen = sg->length - sgoffset;
|
|
|
|
struct page *page = sg_page(sg);
|
|
|
|
int i;
|
|
|
|
|
|
|
|
i = 0;
|
|
|
|
do {
|
|
|
|
unsigned int copy;
|
|
|
|
|
|
|
|
if (!sglen) {
|
|
|
|
sg = sg_next(sg);
|
|
|
|
if (!sg) {
|
|
|
|
pr_warn("sg %d NULL, len %u/%u.\n",
|
|
|
|
i, datalen, dlen);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
sgoffset = 0;
|
|
|
|
sglen = sg->length;
|
|
|
|
page = sg_page(sg);
|
|
|
|
|
|
|
|
}
|
|
|
|
copy = min(datalen, sglen);
|
|
|
|
if (i && page == frags[i - 1].page &&
|
|
|
|
sgoffset + sg->offset ==
|
|
|
|
frags[i - 1].page_offset + frags[i - 1].size) {
|
|
|
|
frags[i - 1].size += copy;
|
|
|
|
} else {
|
|
|
|
if (i >= frag_max) {
|
|
|
|
pr_warn("too many pages %u, dlen %u.\n",
|
|
|
|
frag_max, dlen);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
frags[i].page = page;
|
|
|
|
frags[i].page_offset = sg->offset + sgoffset;
|
|
|
|
frags[i].size = copy;
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
datalen -= copy;
|
|
|
|
sgoffset += copy;
|
|
|
|
sglen -= copy;
|
|
|
|
} while (datalen);
|
|
|
|
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
int cxgbi_conn_alloc_pdu(struct iscsi_task *task, u8 opcode)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
|
|
|
|
struct cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct cxgbi_device *cdev = cconn->chba->cdev;
|
|
|
|
struct iscsi_conn *conn = task->conn;
|
|
|
|
struct iscsi_tcp_task *tcp_task = task->dd_data;
|
2010-09-24 07:43:23 +08:00
|
|
|
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
|
2010-08-17 11:55:53 +08:00
|
|
|
struct scsi_cmnd *sc = task->sc;
|
|
|
|
int headroom = SKB_TX_ISCSI_PDU_HEADER_MAX;
|
|
|
|
|
|
|
|
tcp_task->dd_data = tdata;
|
|
|
|
task->hdr = NULL;
|
|
|
|
|
|
|
|
if (SKB_MAX_HEAD(cdev->skb_tx_rsvd) > (512 * MAX_SKB_FRAGS) &&
|
|
|
|
(opcode == ISCSI_OP_SCSI_DATA_OUT ||
|
|
|
|
(opcode == ISCSI_OP_SCSI_CMD &&
|
|
|
|
(scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE))))
|
|
|
|
/* data could goes into skb head */
|
|
|
|
headroom += min_t(unsigned int,
|
|
|
|
SKB_MAX_HEAD(cdev->skb_tx_rsvd),
|
|
|
|
conn->max_xmit_dlength);
|
|
|
|
|
|
|
|
tdata->skb = alloc_skb(cdev->skb_tx_rsvd + headroom, GFP_ATOMIC);
|
|
|
|
if (!tdata->skb) {
|
|
|
|
pr_warn("alloc skb %u+%u, opcode 0x%x failed.\n",
|
|
|
|
cdev->skb_tx_rsvd, headroom, opcode);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_reserve(tdata->skb, cdev->skb_tx_rsvd);
|
|
|
|
task->hdr = (struct iscsi_hdr *)tdata->skb->data;
|
|
|
|
task->hdr_max = SKB_TX_ISCSI_PDU_HEADER_MAX; /* BHS + AHS */
|
|
|
|
|
|
|
|
/* data_out uses scsi_cmd's itt */
|
|
|
|
if (opcode != ISCSI_OP_SCSI_DATA_OUT)
|
|
|
|
task_reserve_itt(task, &task->hdr->itt);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"task 0x%p, op 0x%x, skb 0x%p,%u+%u/%u, itt 0x%x.\n",
|
|
|
|
task, opcode, tdata->skb, cdev->skb_tx_rsvd, headroom,
|
|
|
|
conn->max_xmit_dlength, ntohl(task->hdr->itt));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_conn_alloc_pdu);
|
|
|
|
|
|
|
|
static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc)
|
|
|
|
{
|
2011-01-08 06:45:39 +08:00
|
|
|
if (hcrc || dcrc) {
|
|
|
|
u8 submode = 0;
|
2010-08-17 11:55:53 +08:00
|
|
|
|
2011-01-08 06:45:39 +08:00
|
|
|
if (hcrc)
|
|
|
|
submode |= 1;
|
|
|
|
if (dcrc)
|
|
|
|
submode |= 2;
|
|
|
|
cxgbi_skcb_ulp_mode(skb) = (ULP2_MODE_ISCSI << 4) | submode;
|
|
|
|
} else
|
|
|
|
cxgbi_skcb_ulp_mode(skb) = 0;
|
2010-08-17 11:55:53 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset,
|
|
|
|
unsigned int count)
|
|
|
|
{
|
|
|
|
struct iscsi_conn *conn = task->conn;
|
2010-09-24 07:43:23 +08:00
|
|
|
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
|
2010-08-17 11:55:53 +08:00
|
|
|
struct sk_buff *skb = tdata->skb;
|
|
|
|
unsigned int datalen = count;
|
|
|
|
int i, padlen = iscsi_padding(count);
|
|
|
|
struct page *pg;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"task 0x%p,0x%p, skb 0x%p, 0x%x,0x%x,0x%x, %u+%u.\n",
|
|
|
|
task, task->sc, skb, (*skb->data) & ISCSI_OPCODE_MASK,
|
|
|
|
ntohl(task->cmdsn), ntohl(task->hdr->itt), offset, count);
|
|
|
|
|
|
|
|
skb_put(skb, task->hdr_len);
|
|
|
|
tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0);
|
|
|
|
if (!count)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (task->sc) {
|
|
|
|
struct scsi_data_buffer *sdb = scsi_out(task->sc);
|
|
|
|
struct scatterlist *sg = NULL;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
tdata->offset = offset;
|
|
|
|
tdata->count = count;
|
|
|
|
err = sgl_seek_offset(
|
|
|
|
sdb->table.sgl, sdb->table.nents,
|
|
|
|
tdata->offset, &tdata->sgoffset, &sg);
|
|
|
|
if (err < 0) {
|
|
|
|
pr_warn("tpdu, sgl %u, bad offset %u/%u.\n",
|
|
|
|
sdb->table.nents, tdata->offset, sdb->length);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count,
|
|
|
|
tdata->frags, MAX_PDU_FRAGS);
|
|
|
|
if (err < 0) {
|
|
|
|
pr_warn("tpdu, sgl %u, bad offset %u + %u.\n",
|
|
|
|
sdb->table.nents, tdata->offset, tdata->count);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
tdata->nr_frags = err;
|
|
|
|
|
|
|
|
if (tdata->nr_frags > MAX_SKB_FRAGS ||
|
|
|
|
(padlen && tdata->nr_frags == MAX_SKB_FRAGS)) {
|
|
|
|
char *dst = skb->data + task->hdr_len;
|
|
|
|
skb_frag_t *frag = tdata->frags;
|
|
|
|
|
|
|
|
/* data fits in the skb's headroom */
|
|
|
|
for (i = 0; i < tdata->nr_frags; i++, frag++) {
|
|
|
|
char *src = kmap_atomic(frag->page,
|
|
|
|
KM_SOFTIRQ0);
|
|
|
|
|
|
|
|
memcpy(dst, src+frag->page_offset, frag->size);
|
|
|
|
dst += frag->size;
|
|
|
|
kunmap_atomic(src, KM_SOFTIRQ0);
|
|
|
|
}
|
|
|
|
if (padlen) {
|
|
|
|
memset(dst, 0, padlen);
|
|
|
|
padlen = 0;
|
|
|
|
}
|
|
|
|
skb_put(skb, count + padlen);
|
|
|
|
} else {
|
|
|
|
/* data fit into frag_list */
|
|
|
|
for (i = 0; i < tdata->nr_frags; i++)
|
|
|
|
get_page(tdata->frags[i].page);
|
|
|
|
|
|
|
|
memcpy(skb_shinfo(skb)->frags, tdata->frags,
|
|
|
|
sizeof(skb_frag_t) * tdata->nr_frags);
|
|
|
|
skb_shinfo(skb)->nr_frags = tdata->nr_frags;
|
|
|
|
skb->len += count;
|
|
|
|
skb->data_len += count;
|
|
|
|
skb->truesize += count;
|
|
|
|
}
|
|
|
|
|
|
|
|
} else {
|
|
|
|
pg = virt_to_page(task->data);
|
|
|
|
|
|
|
|
get_page(pg);
|
|
|
|
skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data),
|
|
|
|
count);
|
|
|
|
skb->len += count;
|
|
|
|
skb->data_len += count;
|
|
|
|
skb->truesize += count;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (padlen) {
|
|
|
|
i = skb_shinfo(skb)->nr_frags;
|
|
|
|
skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
|
|
|
|
virt_to_page(padding), offset_in_page(padding),
|
|
|
|
padlen);
|
|
|
|
|
|
|
|
skb->data_len += padlen;
|
|
|
|
skb->truesize += padlen;
|
|
|
|
skb->len += padlen;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_conn_init_pdu);
|
|
|
|
|
|
|
|
int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
|
|
|
|
struct cxgbi_conn *cconn = tcp_conn->dd_data;
|
2010-09-24 07:43:23 +08:00
|
|
|
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
|
2010-08-17 11:55:53 +08:00
|
|
|
struct sk_buff *skb = tdata->skb;
|
|
|
|
unsigned int datalen;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!skb) {
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"task 0x%p, skb NULL.\n", task);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
datalen = skb->data_len;
|
|
|
|
tdata->skb = NULL;
|
|
|
|
err = cxgbi_sock_send_pdus(cconn->cep->csk, skb);
|
|
|
|
if (err > 0) {
|
|
|
|
int pdulen = err;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"task 0x%p,0x%p, skb 0x%p, len %u/%u, rv %d.\n",
|
|
|
|
task, task->sc, skb, skb->len, skb->data_len, err);
|
|
|
|
|
|
|
|
if (task->conn->hdrdgst_en)
|
|
|
|
pdulen += ISCSI_DIGEST_SIZE;
|
|
|
|
|
|
|
|
if (datalen && task->conn->datadgst_en)
|
|
|
|
pdulen += ISCSI_DIGEST_SIZE;
|
|
|
|
|
|
|
|
task->conn->txdata_octets += pdulen;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (err == -EAGAIN || err == -ENOBUFS) {
|
|
|
|
log_debug(1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"task 0x%p, skb 0x%p, len %u/%u, %d EAGAIN.\n",
|
|
|
|
task, skb, skb->len, skb->data_len, err);
|
|
|
|
/* reset skb to send when we are called again */
|
|
|
|
tdata->skb = skb;
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree_skb(skb);
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
|
|
|
|
"itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
|
|
|
|
task->itt, skb, skb->len, skb->data_len, err);
|
|
|
|
iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
|
|
|
|
iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu);
|
|
|
|
|
|
|
|
void cxgbi_cleanup_task(struct iscsi_task *task)
|
|
|
|
{
|
2010-09-24 07:43:23 +08:00
|
|
|
struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task);
|
2010-08-17 11:55:53 +08:00
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"task 0x%p, skb 0x%p, itt 0x%x.\n",
|
|
|
|
task, tdata->skb, task->hdr_itt);
|
|
|
|
|
|
|
|
/* never reached the xmit task callout */
|
|
|
|
if (tdata->skb)
|
|
|
|
__kfree_skb(tdata->skb);
|
|
|
|
memset(tdata, 0, sizeof(*tdata));
|
|
|
|
|
|
|
|
task_release_itt(task, task->hdr_itt);
|
|
|
|
iscsi_tcp_cleanup_task(task);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_cleanup_task);
|
|
|
|
|
|
|
|
void cxgbi_get_conn_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;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_get_conn_stats);
|
|
|
|
|
|
|
|
static int cxgbi_conn_max_xmit_dlength(struct iscsi_conn *conn)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
|
|
|
|
struct cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct cxgbi_device *cdev = cconn->chba->cdev;
|
|
|
|
unsigned int headroom = SKB_MAX_HEAD(cdev->skb_tx_rsvd);
|
|
|
|
unsigned int max_def = 512 * MAX_SKB_FRAGS;
|
|
|
|
unsigned int max = max(max_def, headroom);
|
|
|
|
|
|
|
|
max = min(cconn->chba->cdev->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;
|
|
|
|
cxgbi_align_pdu_size(conn->max_xmit_dlength);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int cxgbi_conn_max_recv_dlength(struct iscsi_conn *conn)
|
|
|
|
{
|
|
|
|
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
|
|
|
|
struct cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
unsigned int max = cconn->chba->cdev->rx_max_size;
|
|
|
|
|
|
|
|
cxgbi_align_pdu_size(max);
|
|
|
|
|
|
|
|
if (conn->max_recv_dlength) {
|
|
|
|
if (conn->max_recv_dlength > max) {
|
|
|
|
pr_err("MaxRecvDataSegmentLength %u > %u.\n",
|
|
|
|
conn->max_recv_dlength, max);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
conn->max_recv_dlength = min(conn->max_recv_dlength, max);
|
|
|
|
cxgbi_align_pdu_size(conn->max_recv_dlength);
|
|
|
|
} else
|
|
|
|
conn->max_recv_dlength = max;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int cxgbi_set_conn_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 cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct cxgbi_sock *csk = cconn->cep->csk;
|
|
|
|
int value, err = 0;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"cls_conn 0x%p, param %d, buf(%d) %s.\n",
|
|
|
|
cls_conn, param, buflen, buf);
|
|
|
|
|
|
|
|
switch (param) {
|
|
|
|
case ISCSI_PARAM_HDRDGST_EN:
|
|
|
|
err = iscsi_set_param(cls_conn, param, buf, buflen);
|
|
|
|
if (!err && conn->hdrdgst_en)
|
|
|
|
err = csk->cdev->csk_ddp_setup_digest(csk, csk->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 = csk->cdev->csk_ddp_setup_digest(csk, csk->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 = cxgbi_conn_max_recv_dlength(conn);
|
|
|
|
break;
|
|
|
|
case ISCSI_PARAM_MAX_XMIT_DLENGTH:
|
|
|
|
err = iscsi_set_param(cls_conn, param, buf, buflen);
|
|
|
|
if (!err)
|
|
|
|
err = cxgbi_conn_max_xmit_dlength(conn);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return iscsi_set_param(cls_conn, param, buf, buflen);
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
|
|
|
|
|
2011-02-17 05:04:38 +08:00
|
|
|
int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
|
|
|
|
char *buf)
|
2010-08-17 11:55:53 +08:00
|
|
|
{
|
2011-02-17 05:04:38 +08:00
|
|
|
struct cxgbi_endpoint *cep = ep->dd_data;
|
|
|
|
struct cxgbi_sock *csk;
|
2010-08-17 11:55:53 +08:00
|
|
|
int len;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
2011-02-17 05:04:38 +08:00
|
|
|
"cls_conn 0x%p, param %d.\n", ep, param);
|
2010-08-17 11:55:53 +08:00
|
|
|
|
|
|
|
switch (param) {
|
|
|
|
case ISCSI_PARAM_CONN_PORT:
|
|
|
|
case ISCSI_PARAM_CONN_ADDRESS:
|
2011-02-17 05:04:38 +08:00
|
|
|
if (!cep)
|
|
|
|
return -ENOTCONN;
|
|
|
|
|
|
|
|
csk = cep->csk;
|
|
|
|
if (!csk)
|
|
|
|
return -ENOTCONN;
|
|
|
|
|
|
|
|
return iscsi_conn_get_addr_param((struct sockaddr_storage *)
|
|
|
|
&csk->daddr, param, buf);
|
2010-08-17 11:55:53 +08:00
|
|
|
default:
|
2011-02-17 05:04:38 +08:00
|
|
|
return -ENOSYS;
|
2010-08-17 11:55:53 +08:00
|
|
|
}
|
|
|
|
return len;
|
|
|
|
}
|
2011-02-17 05:04:38 +08:00
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_get_ep_param);
|
2010-08-17 11:55:53 +08:00
|
|
|
|
|
|
|
struct iscsi_cls_conn *
|
|
|
|
cxgbi_create_conn(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 cxgbi_conn *cconn;
|
|
|
|
|
|
|
|
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->iconn = conn;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"cid %u(0x%x), cls 0x%p,0x%p, conn 0x%p,0x%p,0x%p.\n",
|
|
|
|
cid, cid, cls_session, cls_conn, conn, tcp_conn, cconn);
|
|
|
|
|
|
|
|
return cls_conn;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_create_conn);
|
|
|
|
|
|
|
|
int cxgbi_bind_conn(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 cxgbi_conn *cconn = tcp_conn->dd_data;
|
|
|
|
struct iscsi_endpoint *ep;
|
|
|
|
struct cxgbi_endpoint *cep;
|
|
|
|
struct cxgbi_sock *csk;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
ep = iscsi_lookup_endpoint(transport_eph);
|
|
|
|
if (!ep)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
/* setup ddp pagesize */
|
|
|
|
cep = ep->dd_data;
|
|
|
|
csk = cep->csk;
|
|
|
|
err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, page_idx, 0);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
2010-09-24 07:43:23 +08:00
|
|
|
write_lock_bh(&csk->callback_lock);
|
2010-08-17 11:55:53 +08:00
|
|
|
csk->user_data = conn;
|
|
|
|
cconn->chba = cep->chba;
|
|
|
|
cconn->cep = cep;
|
|
|
|
cep->cconn = cconn;
|
2010-09-24 07:43:23 +08:00
|
|
|
write_unlock_bh(&csk->callback_lock);
|
2010-08-17 11:55:53 +08:00
|
|
|
|
|
|
|
cxgbi_conn_max_xmit_dlength(conn);
|
|
|
|
cxgbi_conn_max_recv_dlength(conn);
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"cls 0x%p,0x%p, ep 0x%p, cconn 0x%p, csk 0x%p.\n",
|
|
|
|
cls_session, cls_conn, ep, cconn, csk);
|
|
|
|
/* init recv engine */
|
|
|
|
iscsi_tcp_hdr_recv_prep(tcp_conn);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_bind_conn);
|
|
|
|
|
|
|
|
struct iscsi_cls_session *cxgbi_create_session(struct iscsi_endpoint *ep,
|
|
|
|
u16 cmds_max, u16 qdepth,
|
|
|
|
u32 initial_cmdsn)
|
|
|
|
{
|
|
|
|
struct cxgbi_endpoint *cep;
|
|
|
|
struct cxgbi_hba *chba;
|
|
|
|
struct Scsi_Host *shost;
|
|
|
|
struct iscsi_cls_session *cls_session;
|
|
|
|
struct iscsi_session *session;
|
|
|
|
|
|
|
|
if (!ep) {
|
|
|
|
pr_err("missing endpoint.\n");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
cep = ep->dd_data;
|
|
|
|
chba = cep->chba;
|
|
|
|
shost = chba->shost;
|
|
|
|
|
|
|
|
BUG_ON(chba != iscsi_host_priv(shost));
|
|
|
|
|
|
|
|
cls_session = iscsi_session_setup(chba->cdev->itp, shost,
|
|
|
|
cmds_max, 0,
|
|
|
|
sizeof(struct iscsi_tcp_task) +
|
|
|
|
sizeof(struct cxgbi_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;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"ep 0x%p, cls sess 0x%p.\n", ep, cls_session);
|
|
|
|
return cls_session;
|
|
|
|
|
|
|
|
remove_session:
|
|
|
|
iscsi_session_teardown(cls_session);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_create_session);
|
|
|
|
|
|
|
|
void cxgbi_destroy_session(struct iscsi_cls_session *cls_session)
|
|
|
|
{
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"cls sess 0x%p.\n", cls_session);
|
|
|
|
|
|
|
|
iscsi_tcp_r2tpool_free(cls_session->dd_data);
|
|
|
|
iscsi_session_teardown(cls_session);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_destroy_session);
|
|
|
|
|
|
|
|
int cxgbi_set_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
|
|
|
|
char *buf, int buflen)
|
|
|
|
{
|
|
|
|
struct cxgbi_hba *chba = iscsi_host_priv(shost);
|
|
|
|
|
|
|
|
if (!chba->ndev) {
|
|
|
|
shost_printk(KERN_ERR, shost, "Could not get host param. "
|
|
|
|
"netdev for host not set.\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"shost 0x%p, hba 0x%p,%s, param %d, buf(%d) %s.\n",
|
|
|
|
shost, chba, chba->ndev->name, param, buflen, buf);
|
|
|
|
|
|
|
|
switch (param) {
|
|
|
|
case ISCSI_HOST_PARAM_IPADDRESS:
|
|
|
|
{
|
|
|
|
__be32 addr = in_aton(buf);
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"hba %s, req. ipv4 %pI4.\n", chba->ndev->name, &addr);
|
|
|
|
cxgbi_set_iscsi_ipv4(chba, addr);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
case ISCSI_HOST_PARAM_HWADDRESS:
|
|
|
|
case ISCSI_HOST_PARAM_NETDEV_NAME:
|
|
|
|
return 0;
|
|
|
|
default:
|
|
|
|
return iscsi_host_set_param(shost, param, buf, buflen);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_set_host_param);
|
|
|
|
|
|
|
|
int cxgbi_get_host_param(struct Scsi_Host *shost, enum iscsi_host_param param,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct cxgbi_hba *chba = iscsi_host_priv(shost);
|
|
|
|
int len = 0;
|
|
|
|
|
|
|
|
if (!chba->ndev) {
|
|
|
|
shost_printk(KERN_ERR, shost, "Could not get host param. "
|
|
|
|
"netdev for host not set.\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"shost 0x%p, hba 0x%p,%s, param %d.\n",
|
|
|
|
shost, chba, chba->ndev->name, param);
|
|
|
|
|
|
|
|
switch (param) {
|
|
|
|
case ISCSI_HOST_PARAM_HWADDRESS:
|
|
|
|
len = sysfs_format_mac(buf, chba->ndev->dev_addr, 6);
|
|
|
|
break;
|
|
|
|
case ISCSI_HOST_PARAM_NETDEV_NAME:
|
|
|
|
len = sprintf(buf, "%s\n", chba->ndev->name);
|
|
|
|
break;
|
|
|
|
case ISCSI_HOST_PARAM_IPADDRESS:
|
|
|
|
{
|
|
|
|
__be32 addr;
|
|
|
|
|
|
|
|
addr = cxgbi_get_iscsi_ipv4(chba);
|
|
|
|
len = sprintf(buf, "%pI4", &addr);
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"hba %s, ipv4 %pI4.\n", chba->ndev->name, &addr);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
return iscsi_host_get_param(shost, param, buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_get_host_param);
|
|
|
|
|
|
|
|
struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
|
|
|
|
struct sockaddr *dst_addr,
|
|
|
|
int non_blocking)
|
|
|
|
{
|
|
|
|
struct iscsi_endpoint *ep;
|
|
|
|
struct cxgbi_endpoint *cep;
|
|
|
|
struct cxgbi_hba *hba = NULL;
|
|
|
|
struct cxgbi_sock *csk;
|
|
|
|
int err = -EINVAL;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
|
|
|
|
"shost 0x%p, non_blocking %d, dst_addr 0x%p.\n",
|
|
|
|
shost, non_blocking, dst_addr);
|
|
|
|
|
|
|
|
if (shost) {
|
|
|
|
hba = iscsi_host_priv(shost);
|
|
|
|
if (!hba) {
|
|
|
|
pr_info("shost 0x%p, priv NULL.\n", shost);
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
csk = cxgbi_check_route(dst_addr);
|
|
|
|
if (IS_ERR(csk))
|
|
|
|
return (struct iscsi_endpoint *)csk;
|
|
|
|
cxgbi_sock_get(csk);
|
|
|
|
|
|
|
|
if (!hba)
|
|
|
|
hba = csk->cdev->hbas[csk->port_id];
|
|
|
|
else if (hba != csk->cdev->hbas[csk->port_id]) {
|
|
|
|
pr_info("Could not connect through requested host %u"
|
|
|
|
"hba 0x%p != 0x%p (%u).\n",
|
|
|
|
shost->host_no, hba,
|
|
|
|
csk->cdev->hbas[csk->port_id], csk->port_id);
|
|
|
|
err = -ENOSPC;
|
|
|
|
goto release_conn;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = sock_get_port(csk);
|
|
|
|
if (err)
|
|
|
|
goto release_conn;
|
|
|
|
|
|
|
|
cxgbi_sock_set_state(csk, CTP_CONNECTING);
|
|
|
|
err = csk->cdev->csk_init_act_open(csk);
|
|
|
|
if (err)
|
|
|
|
goto release_conn;
|
|
|
|
|
|
|
|
if (cxgbi_sock_is_closing(csk)) {
|
|
|
|
err = -ENOSPC;
|
|
|
|
pr_info("csk 0x%p is closing.\n", csk);
|
|
|
|
goto release_conn;
|
|
|
|
}
|
|
|
|
|
|
|
|
ep = iscsi_create_endpoint(sizeof(*cep));
|
|
|
|
if (!ep) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
pr_info("iscsi alloc ep, OOM.\n");
|
|
|
|
goto release_conn;
|
|
|
|
}
|
|
|
|
|
|
|
|
cep = ep->dd_data;
|
|
|
|
cep->csk = csk;
|
|
|
|
cep->chba = hba;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
|
|
|
|
"ep 0x%p, cep 0x%p, csk 0x%p, hba 0x%p,%s.\n",
|
|
|
|
ep, cep, csk, hba, hba->ndev->name);
|
|
|
|
return ep;
|
|
|
|
|
|
|
|
release_conn:
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
err_out:
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ep_connect);
|
|
|
|
|
|
|
|
int cxgbi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
|
|
|
|
{
|
|
|
|
struct cxgbi_endpoint *cep = ep->dd_data;
|
|
|
|
struct cxgbi_sock *csk = cep->csk;
|
|
|
|
|
|
|
|
if (!cxgbi_sock_is_established(csk))
|
|
|
|
return 0;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ep_poll);
|
|
|
|
|
|
|
|
void cxgbi_ep_disconnect(struct iscsi_endpoint *ep)
|
|
|
|
{
|
|
|
|
struct cxgbi_endpoint *cep = ep->dd_data;
|
|
|
|
struct cxgbi_conn *cconn = cep->cconn;
|
|
|
|
struct cxgbi_sock *csk = cep->csk;
|
|
|
|
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_SOCK,
|
|
|
|
"ep 0x%p, cep 0x%p, cconn 0x%p, csk 0x%p,%u,0x%lx.\n",
|
|
|
|
ep, cep, cconn, csk, csk->state, csk->flags);
|
|
|
|
|
|
|
|
if (cconn && cconn->iconn) {
|
|
|
|
iscsi_suspend_tx(cconn->iconn);
|
|
|
|
write_lock_bh(&csk->callback_lock);
|
|
|
|
cep->csk->user_data = NULL;
|
|
|
|
cconn->cep = NULL;
|
|
|
|
write_unlock_bh(&csk->callback_lock);
|
|
|
|
}
|
|
|
|
iscsi_destroy_endpoint(ep);
|
|
|
|
|
|
|
|
if (likely(csk->state >= CTP_ESTABLISHED))
|
|
|
|
need_active_close(csk);
|
|
|
|
else
|
|
|
|
cxgbi_sock_closed(csk);
|
|
|
|
|
|
|
|
cxgbi_sock_put(csk);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_ep_disconnect);
|
|
|
|
|
|
|
|
int cxgbi_iscsi_init(struct iscsi_transport *itp,
|
|
|
|
struct scsi_transport_template **stt)
|
|
|
|
{
|
|
|
|
*stt = iscsi_register_transport(itp);
|
|
|
|
if (*stt == NULL) {
|
|
|
|
pr_err("unable to register %s transport 0x%p.\n",
|
|
|
|
itp->name, itp);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"%s, registered iscsi transport 0x%p.\n",
|
|
|
|
itp->name, stt);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_iscsi_init);
|
|
|
|
|
|
|
|
void cxgbi_iscsi_cleanup(struct iscsi_transport *itp,
|
|
|
|
struct scsi_transport_template **stt)
|
|
|
|
{
|
|
|
|
if (*stt) {
|
|
|
|
log_debug(1 << CXGBI_DBG_ISCSI,
|
|
|
|
"de-register transport 0x%p, %s, stt 0x%p.\n",
|
|
|
|
itp, itp->name, *stt);
|
|
|
|
*stt = NULL;
|
|
|
|
iscsi_unregister_transport(itp);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(cxgbi_iscsi_cleanup);
|
|
|
|
|
|
|
|
static int __init libcxgbi_init_module(void)
|
|
|
|
{
|
|
|
|
sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1;
|
|
|
|
sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1;
|
|
|
|
|
|
|
|
pr_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);
|
|
|
|
|
|
|
|
ddp_setup_host_page_size();
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit libcxgbi_exit_module(void)
|
|
|
|
{
|
|
|
|
cxgbi_device_unregister_all(0xFF);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(libcxgbi_init_module);
|
|
|
|
module_exit(libcxgbi_exit_module);
|