| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Karen Xie | 9712 | 68.51% | 8 | 13.11% |
| Varun Prakash | 2662 | 18.78% | 20 | 32.79% |
| Anish Bhatt | 1398 | 9.86% | 6 | 9.84% |
| Michael Christie | 217 | 1.53% | 5 | 8.20% |
| David S. Miller | 87 | 0.61% | 8 | 13.11% |
| Ian Campbell | 44 | 0.31% | 1 | 1.64% |
| Jiri Benc | 13 | 0.09% | 1 | 1.64% |
| David Ahern | 9 | 0.06% | 1 | 1.64% |
| Parav Pandit | 9 | 0.06% | 1 | 1.64% |
| Christoph Hellwig | 6 | 0.04% | 1 | 1.64% |
| Thadeu Lima de Souza Cascardo | 6 | 0.04% | 1 | 1.64% |
| Paul Gortmaker | 3 | 0.02% | 1 | 1.64% |
| Colin Ian King | 2 | 0.01% | 1 | 1.64% |
| Martin KaFai Lau | 2 | 0.01% | 1 | 1.64% |
| Kees Cook | 2 | 0.01% | 1 | 1.64% |
| Al Viro | 1 | 0.01% | 1 | 1.64% |
| Pankaj Bharadiya | 1 | 0.01% | 1 | 1.64% |
| Hans Wennborg | 1 | 0.01% | 1 | 1.64% |
| Hannes Reinecke | 1 | 0.01% | 1 | 1.64% |
| Total | 14176 | 61 |
/* * libcxgbi.c: Chelsio common library for T3/T4 iSCSI driver. * * Copyright (c) 2010-2015 Chelsio Communications, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation. * * Written by: Karen Xie (kxie@chelsio.com) * Written by: Rakesh Ranjan (rranjan@chelsio.com) */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ #include <linux/skbuff.h> #include <linux/crypto.h> #include <linux/scatterlist.h> #include <linux/pci.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_host.h> #include <linux/if_vlan.h> #include <linux/inet.h> #include <net/dst.h> #include <net/route.h> #include <net/ipv6.h> #include <net/ip6_route.h> #include <net/addrconf.h> #include <linux/inetdevice.h> /* ip_dev_find */ #include <linux/module.h> #include <net/tcp.h> static unsigned int dbg_level; #include "libcxgbi.h" #define DRV_MODULE_NAME "libcxgbi" #define DRV_MODULE_DESC "Chelsio iSCSI driver library" #define DRV_MODULE_VERSION "0.9.1-ko" #define DRV_MODULE_RELDATE "Apr. 2015" static char version[] = DRV_MODULE_DESC " " DRV_MODULE_NAME " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; MODULE_AUTHOR("Chelsio Communications, Inc."); MODULE_DESCRIPTION(DRV_MODULE_DESC); MODULE_VERSION(DRV_MODULE_VERSION); MODULE_LICENSE("GPL"); module_param(dbg_level, uint, 0644); MODULE_PARM_DESC(dbg_level, "libiscsi debug level (default=0)"); /* * cxgbi device management * maintains a list of the cxgbi devices */ static LIST_HEAD(cdev_list); static DEFINE_MUTEX(cdev_mutex); static LIST_HEAD(cdev_rcu_list); static DEFINE_SPINLOCK(cdev_rcu_lock); static inline void cxgbi_decode_sw_tag(u32 sw_tag, int *idx, int *age) { if (age) *age = sw_tag & 0x7FFF; if (idx) *idx = (sw_tag >> 16) & 0x7FFF; } int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, unsigned int max_conn) { struct cxgbi_ports_map *pmap = &cdev->pmap; pmap->port_csk = cxgbi_alloc_big_mem(max_conn * sizeof(struct cxgbi_sock *), GFP_KERNEL); if (!pmap->port_csk) { pr_warn("cdev 0x%p, portmap OOM %u.\n", cdev, max_conn); return -ENOMEM; } pmap->max_connect = max_conn; pmap->sport_base = base; spin_lock_init(&pmap->lock); return 0; } EXPORT_SYMBOL_GPL(cxgbi_device_portmap_create); void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev) { struct cxgbi_ports_map *pmap = &cdev->pmap; struct cxgbi_sock *csk; int i; for (i = 0; i < pmap->max_connect; i++) { if (pmap->port_csk[i]) { csk = pmap->port_csk[i]; pmap->port_csk[i] = NULL; log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p, cdev 0x%p, offload down.\n", csk, cdev); spin_lock_bh(&csk->lock); cxgbi_sock_set_flag(csk, CTPF_OFFLOAD_DOWN); cxgbi_sock_closed(csk); spin_unlock_bh(&csk->lock); cxgbi_sock_put(csk); } } } EXPORT_SYMBOL_GPL(cxgbi_device_portmap_cleanup); static inline void cxgbi_device_destroy(struct cxgbi_device *cdev) { log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p# %u.\n", cdev, cdev->nports); cxgbi_hbas_remove(cdev); cxgbi_device_portmap_cleanup(cdev); if (cdev->cdev2ppm) cxgbi_ppm_release(cdev->cdev2ppm(cdev)); if (cdev->pmap.max_connect) cxgbi_free_big_mem(cdev->pmap.port_csk); kfree(cdev); } struct cxgbi_device *cxgbi_device_register(unsigned int extra, unsigned int nports) { struct cxgbi_device *cdev; cdev = kzalloc(sizeof(*cdev) + extra + nports * (sizeof(struct cxgbi_hba *) + sizeof(struct net_device *)), GFP_KERNEL); if (!cdev) { pr_warn("nport %d, OOM.\n", nports); return NULL; } cdev->ports = (struct net_device **)(cdev + 1); cdev->hbas = (struct cxgbi_hba **)(((char*)cdev->ports) + nports * sizeof(struct net_device *)); if (extra) cdev->dd_data = ((char *)cdev->hbas) + nports * sizeof(struct cxgbi_hba *); spin_lock_init(&cdev->pmap.lock); mutex_lock(&cdev_mutex); list_add_tail(&cdev->list_head, &cdev_list); mutex_unlock(&cdev_mutex); spin_lock(&cdev_rcu_lock); list_add_tail_rcu(&cdev->rcu_node, &cdev_rcu_list); spin_unlock(&cdev_rcu_lock); log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p# %u.\n", cdev, nports); return cdev; } EXPORT_SYMBOL_GPL(cxgbi_device_register); void cxgbi_device_unregister(struct cxgbi_device *cdev) { log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p# %u,%s.\n", cdev, cdev->nports, cdev->nports ? cdev->ports[0]->name : ""); mutex_lock(&cdev_mutex); list_del(&cdev->list_head); mutex_unlock(&cdev_mutex); spin_lock(&cdev_rcu_lock); list_del_rcu(&cdev->rcu_node); spin_unlock(&cdev_rcu_lock); synchronize_rcu(); cxgbi_device_destroy(cdev); } EXPORT_SYMBOL_GPL(cxgbi_device_unregister); void cxgbi_device_unregister_all(unsigned int flag) { struct cxgbi_device *cdev, *tmp; mutex_lock(&cdev_mutex); list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { if ((cdev->flags & flag) == flag) { mutex_unlock(&cdev_mutex); cxgbi_device_unregister(cdev); mutex_lock(&cdev_mutex); } } mutex_unlock(&cdev_mutex); } EXPORT_SYMBOL_GPL(cxgbi_device_unregister_all); struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev) { struct cxgbi_device *cdev, *tmp; mutex_lock(&cdev_mutex); list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { if (cdev->lldev == lldev) { mutex_unlock(&cdev_mutex); return cdev; } } mutex_unlock(&cdev_mutex); log_debug(1 << CXGBI_DBG_DEV, "lldev 0x%p, NO match found.\n", lldev); return NULL; } EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev); struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, int *port) { struct net_device *vdev = NULL; struct cxgbi_device *cdev, *tmp; int i; if (is_vlan_dev(ndev)) { vdev = ndev; ndev = vlan_dev_real_dev(ndev); log_debug(1 << CXGBI_DBG_DEV, "vlan dev %s -> %s.\n", vdev->name, ndev->name); } mutex_lock(&cdev_mutex); list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { for (i = 0; i < cdev->nports; i++) { if (ndev == cdev->ports[i]) { cdev->hbas[i]->vdev = vdev; mutex_unlock(&cdev_mutex); if (port) *port = i; return cdev; } } } mutex_unlock(&cdev_mutex); log_debug(1 << CXGBI_DBG_DEV, "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); return NULL; } EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev); struct cxgbi_device *cxgbi_device_find_by_netdev_rcu(struct net_device *ndev, int *port) { struct net_device *vdev = NULL; struct cxgbi_device *cdev; int i; if (is_vlan_dev(ndev)) { vdev = ndev; ndev = vlan_dev_real_dev(ndev); pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); } rcu_read_lock(); list_for_each_entry_rcu(cdev, &cdev_rcu_list, rcu_node) { for (i = 0; i < cdev->nports; i++) { if (ndev == cdev->ports[i]) { cdev->hbas[i]->vdev = vdev; rcu_read_unlock(); if (port) *port = i; return cdev; } } } rcu_read_unlock(); log_debug(1 << CXGBI_DBG_DEV, "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); return NULL; } EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev_rcu); static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev, int *port) { struct net_device *vdev = NULL; struct cxgbi_device *cdev, *tmp; int i; if (is_vlan_dev(ndev)) { vdev = ndev; ndev = vlan_dev_real_dev(ndev); pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); } mutex_lock(&cdev_mutex); list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { for (i = 0; i < cdev->nports; i++) { if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr, MAX_ADDR_LEN)) { cdev->hbas[i]->vdev = vdev; mutex_unlock(&cdev_mutex); if (port) *port = i; return cdev; } } } mutex_unlock(&cdev_mutex); log_debug(1 << CXGBI_DBG_DEV, "ndev 0x%p, %s, NO match mac found.\n", ndev, ndev->name); return NULL; } void cxgbi_hbas_remove(struct cxgbi_device *cdev) { int i; struct cxgbi_hba *chba; log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports); for (i = 0; i < cdev->nports; i++) { chba = cdev->hbas[i]; if (chba) { cdev->hbas[i] = NULL; iscsi_host_remove(chba->shost); pci_dev_put(cdev->pdev); iscsi_host_free(chba->shost); } } } EXPORT_SYMBOL_GPL(cxgbi_hbas_remove); int cxgbi_hbas_add(struct cxgbi_device *cdev, u64 max_lun, unsigned int max_id, struct scsi_host_template *sht, struct scsi_transport_template *stt) { struct cxgbi_hba *chba; struct Scsi_Host *shost; int i, err; log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%u.\n", cdev, cdev->nports); for (i = 0; i < cdev->nports; i++) { shost = iscsi_host_alloc(sht, sizeof(*chba), 1); if (!shost) { pr_info("0x%p, p%d, %s, host alloc failed.\n", cdev, i, cdev->ports[i]->name); err = -ENOMEM; goto err_out; } shost->transportt = stt; shost->max_lun = max_lun; shost->max_id = max_id; shost->max_channel = 0; shost->max_cmd_len = 16; chba = iscsi_host_priv(shost); chba->cdev = cdev; chba->ndev = cdev->ports[i]; chba->shost = shost; log_debug(1 << CXGBI_DBG_DEV, "cdev 0x%p, p#%d %s: chba 0x%p.\n", cdev, i, cdev->ports[i]->name, chba); pci_dev_get(cdev->pdev); err = iscsi_host_add(shost, &cdev->pdev->dev); if (err) { pr_info("cdev 0x%p, p#%d %s, host add failed.\n", cdev, i, cdev->ports[i]->name); pci_dev_put(cdev->pdev); scsi_host_put(shost); goto err_out; } cdev->hbas[i] = chba; } return 0; err_out: cxgbi_hbas_remove(cdev); return err; } EXPORT_SYMBOL_GPL(cxgbi_hbas_add); /* * iSCSI offload * * - source port management * To find a free source port in the port allocation map we use a very simple * rotor scheme to look for the next free port. * * If a source port has been specified make sure that it doesn't collide with * our normal source port allocation map. If it's outside the range of our * allocation/deallocation scheme just let them use it. * * If the source port is outside our allocation range, the caller is * responsible for keeping track of their port usage. */ static struct cxgbi_sock *find_sock_on_port(struct cxgbi_device *cdev, unsigned char port_id) { struct cxgbi_ports_map *pmap = &cdev->pmap; unsigned int i; unsigned int used; if (!pmap->max_connect || !pmap->used) return NULL; spin_lock_bh(&pmap->lock); used = pmap->used; for (i = 0; used && i < pmap->max_connect; i++) { struct cxgbi_sock *csk = pmap->port_csk[i]; if (csk) { if (csk->port_id == port_id) { spin_unlock_bh(&pmap->lock); return csk; } used--; } } spin_unlock_bh(&pmap->lock); return NULL; } static int sock_get_port(struct cxgbi_sock *csk) { struct cxgbi_device *cdev = csk->cdev; struct cxgbi_ports_map *pmap = &cdev->pmap; unsigned int start; int idx; __be16 *port; if (!pmap->max_connect) { pr_err("cdev 0x%p, p#%u %s, NO port map.\n", cdev, csk->port_id, cdev->ports[csk->port_id]->name); return -EADDRNOTAVAIL; } if (csk->csk_family == AF_INET) port = &csk->saddr.sin_port; else /* ipv6 */ port = &csk->saddr6.sin6_port; if (*port) { pr_err("source port NON-ZERO %u.\n", ntohs(*port)); return -EADDRINUSE; } spin_lock_bh(&pmap->lock); if (pmap->used >= pmap->max_connect) { spin_unlock_bh(&pmap->lock); pr_info("cdev 0x%p, p#%u %s, ALL ports used.\n", cdev, csk->port_id, cdev->ports[csk->port_id]->name); return -EADDRNOTAVAIL; } start = idx = pmap->next; do { if (++idx >= pmap->max_connect) idx = 0; if (!pmap->port_csk[idx]) { pmap->used++; *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; __be16 *port; if (csk->csk_family == AF_INET) port = &csk->saddr.sin_port; else /* ipv6 */ port = &csk->saddr6.sin6_port; if (*port) { int idx = ntohs(*port) - pmap->sport_base; *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(*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); timer_setup(&csk->retry_timer, NULL, 0); init_completion(&csk->cmpl); 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; } static struct rtable *find_route_ipv4(struct flowi4 *fl4, __be32 saddr, __be32 daddr, __be16 sport, __be16 dport, u8 tos, int ifindex) { struct rtable *rt; rt = ip_route_output_ports(&init_net, fl4, NULL, daddr, saddr, dport, sport, IPPROTO_TCP, tos, ifindex); if (IS_ERR(rt)) return NULL; return rt; } static struct cxgbi_sock * cxgbi_check_route(struct sockaddr *dst_addr, int ifindex) { 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; struct neighbour *n; struct flowi4 fl4; struct cxgbi_sock *csk = NULL; unsigned int mtu = 0; int port = 0xFFFF; int err = 0; rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0, ifindex); if (!rt) { pr_info("no route to ipv4 0x%x, port %u.\n", be32_to_cpu(daddr->sin_addr.s_addr), be16_to_cpu(daddr->sin_port)); err = -ENETUNREACH; goto err_out; } dst = &rt->dst; n = dst_neigh_lookup(dst, &daddr->sin_addr.s_addr); if (!n) { err = -ENODEV; goto rel_rt; } ndev = n->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_neigh; } if (ndev->flags & IFF_LOOPBACK) { ndev = ip_dev_find(&init_net, daddr->sin_addr.s_addr); if (!ndev) { err = -ENETUNREACH; goto rel_neigh; } mtu = ndev->mtu; pr_info("rt dev %s, loopback -> %s, mtu %u.\n", n->dev->name, ndev->name, mtu); } if (!(ndev->flags & IFF_UP) || !netif_carrier_ok(ndev)) { pr_info("%s interface not up.\n", ndev->name); err = -ENETDOWN; goto rel_neigh; } cdev = cxgbi_device_find_by_netdev(ndev, &port); if (!cdev) cdev = cxgbi_device_find_by_mac(ndev, &port); if (!cdev) { pr_info("dst %pI4, %s, NOT cxgbi device.\n", &daddr->sin_addr.s_addr, ndev->name); err = -ENETUNREACH; goto rel_neigh; } 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_neigh; } csk->cdev = cdev; csk->port_id = port; csk->mtu = mtu; csk->dst = dst; csk->csk_family = AF_INET; csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr; csk->daddr.sin_port = daddr->sin_port; csk->daddr.sin_family = daddr->sin_family; csk->saddr.sin_family = daddr->sin_family; csk->saddr.sin_addr.s_addr = fl4.saddr; neigh_release(n); return csk; rel_neigh: neigh_release(n); rel_rt: ip_rt_put(rt); err_out: return ERR_PTR(err); } #if IS_ENABLED(CONFIG_IPV6) static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr, const struct in6_addr *daddr, int ifindex) { struct flowi6 fl; memset(&fl, 0, sizeof(fl)); fl.flowi6_oif = ifindex; if (saddr) memcpy(&fl.saddr, saddr, sizeof(struct in6_addr)); if (daddr) memcpy(&fl.daddr, daddr, sizeof(struct in6_addr)); return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); } static struct cxgbi_sock * cxgbi_check_route6(struct sockaddr *dst_addr, int ifindex) { struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr; struct dst_entry *dst; struct net_device *ndev; struct cxgbi_device *cdev; struct rt6_info *rt = NULL; struct neighbour *n; struct in6_addr pref_saddr; struct cxgbi_sock *csk = NULL; unsigned int mtu = 0; int port = 0xFFFF; int err = 0; rt = find_route_ipv6(NULL, &daddr6->sin6_addr, ifindex); if (!rt) { pr_info("no route to ipv6 %pI6 port %u\n", daddr6->sin6_addr.s6_addr, be16_to_cpu(daddr6->sin6_port)); err = -ENETUNREACH; goto err_out; } dst = &rt->dst; n = dst_neigh_lookup(dst, &daddr6->sin6_addr); if (!n) { pr_info("%pI6, port %u, dst no neighbour.\n", daddr6->sin6_addr.s6_addr, be16_to_cpu(daddr6->sin6_port)); err = -ENETUNREACH; goto rel_rt; } ndev = n->dev; if (!(ndev->flags & IFF_UP) || !netif_carrier_ok(ndev)) { pr_info("%s interface not up.\n", ndev->name); err = -ENETDOWN; goto rel_rt; } if (ipv6_addr_is_multicast(&daddr6->sin6_addr)) { pr_info("multi-cast route %pI6 port %u, dev %s.\n", daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), ndev->name); err = -ENETUNREACH; goto rel_rt; } cdev = cxgbi_device_find_by_netdev(ndev, &port); if (!cdev) cdev = cxgbi_device_find_by_mac(ndev, &port); if (!cdev) { pr_info("dst %pI6 %s, NOT cxgbi device.\n", daddr6->sin6_addr.s6_addr, ndev->name); err = -ENETUNREACH; goto rel_rt; } log_debug(1 << CXGBI_DBG_SOCK, "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n", daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_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; rt6_get_prefsrc(rt, &pref_saddr); if (ipv6_addr_any(&pref_saddr)) { struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt); err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL, &daddr6->sin6_addr, 0, &pref_saddr); if (err) { pr_info("failed to get source address to reach %pI6\n", &daddr6->sin6_addr); goto rel_rt; } } csk->csk_family = AF_INET6; csk->daddr6.sin6_addr = daddr6->sin6_addr; csk->daddr6.sin6_port = daddr6->sin6_port; csk->daddr6.sin6_family = daddr6->sin6_family; csk->saddr6.sin6_family = daddr6->sin6_family; csk->saddr6.sin6_addr = pref_saddr; neigh_release(n); return csk; rel_rt: if (n) neigh_release(n); ip6_rt_put(rt); if (csk) cxgbi_sock_closed(csk); err_out: return ERR_PTR(err); } #endif /* IS_ENABLED(CONFIG_IPV6) */ 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) { read_lock_bh(&csk->callback_lock); if (csk->user_data) iscsi_conn_failure(csk->user_data, ISCSI_ERR_TCP_CONN_CLOSE); read_unlock_bh(&csk->callback_lock); } } 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); if (csk->dst) 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 (!cxgbi_sock_flag(csk, CTPF_LOGOUT_RSP_RCVD) || 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; struct module *owner = csk->cdev->owner; 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); module_put(owner); } 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); cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_RCVD); if (cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { 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; csk->advmss = dst_metric_advmss(dst); 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 >= csk->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, csk->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; } if (likely(skb_queue_len(&csk->write_queue))) cdev->csk_push_tx_frames(csk, 1); done: 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; } static inline void scmd_get_params(struct scsi_cmnd *sc, struct scatterlist **sgl, unsigned int *sgcnt, unsigned int *dlen, unsigned int prot) { struct scsi_data_buffer *sdb = prot ? scsi_prot(sc) : &sc->sdb; *sgl = sdb->table.sgl; *sgcnt = sdb->table.nents; *dlen = sdb->length; /* Caution: for protection sdb, sdb->length is invalid */ } void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *ppod, struct cxgbi_task_tag_info *ttinfo, struct scatterlist **sg_pp, unsigned int *sg_off) { struct scatterlist *sg = sg_pp ? *sg_pp : NULL; unsigned int offset = sg_off ? *sg_off : 0; dma_addr_t addr = 0UL; unsigned int len = 0; int i; memcpy(ppod, &ttinfo->hdr, sizeof(struct cxgbi_pagepod_hdr)); if (sg) { addr = sg_dma_address(sg); len = sg_dma_len(sg); } for (i = 0; i < PPOD_PAGES_MAX; i++) { if (sg) { ppod->addr[i] = cpu_to_be64(addr + offset); offset += PAGE_SIZE; if (offset == (len + sg->offset)) { offset = 0; sg = sg_next(sg); if (sg) { addr = sg_dma_address(sg); len = sg_dma_len(sg); } } } else { ppod->addr[i] = 0ULL; } } /* * the fifth address needs to be repeated in the next ppod, so do * not move sg */ if (sg_pp) { *sg_pp = sg; *sg_off = offset; } if (offset == len) { offset = 0; sg = sg_next(sg); if (sg) { addr = sg_dma_address(sg); len = sg_dma_len(sg); } } ppod->addr[i] = sg ? cpu_to_be64(addr + offset) : 0ULL; } EXPORT_SYMBOL_GPL(cxgbi_ddp_set_one_ppod); /* * APIs interacting with open-iscsi libraries */ static unsigned char padding[4]; int cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev, struct cxgbi_tag_format *tformat, unsigned int iscsi_size, unsigned int llimit, unsigned int start, unsigned int rsvd_factor, unsigned int edram_start, unsigned int edram_size) { int err = cxgbi_ppm_init(ppm_pp, cdev->ports[0], cdev->pdev, cdev->lldev, tformat, iscsi_size, llimit, start, rsvd_factor, edram_start, edram_size); if (err >= 0) { struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp); if (ppm->ppmax < 1024 || ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) cdev->flags |= CXGBI_FLAG_DDP_OFF; err = 0; } else { cdev->flags |= CXGBI_FLAG_DDP_OFF; } return err; } EXPORT_SYMBOL_GPL(cxgbi_ddp_ppm_setup); static int cxgbi_ddp_sgl_check(struct scatterlist *sgl, int nents) { int i; int last_sgidx = nents - 1; struct scatterlist *sg = sgl; for (i = 0; i < nents; i++, sg = sg_next(sg)) { unsigned int len = sg->length + sg->offset; if ((sg->offset & 0x3) || (i && sg->offset) || ((i != last_sgidx) && len != PAGE_SIZE)) { log_debug(1 << CXGBI_DBG_DDP, "sg %u/%u, %u,%u, not aligned.\n", i, nents, sg->offset, sg->length); goto err_out; } } return 0; err_out: return -EINVAL; } static int cxgbi_ddp_reserve(struct cxgbi_conn *cconn, struct cxgbi_task_data *tdata, u32 sw_tag, unsigned int xferlen) { struct cxgbi_sock *csk = cconn->cep->csk; struct cxgbi_device *cdev = csk->cdev; struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; struct scatterlist *sgl = ttinfo->sgl; unsigned int sgcnt = ttinfo->nents; unsigned int sg_offset = sgl->offset; int err; if (cdev->flags & CXGBI_FLAG_DDP_OFF) { log_debug(1 << CXGBI_DBG_DDP, "cdev 0x%p DDP off.\n", cdev); return -EINVAL; } if (!ppm || xferlen < DDP_THRESHOLD || !sgcnt || ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) { log_debug(1 << CXGBI_DBG_DDP, "ppm 0x%p, pgidx %u, xfer %u, sgcnt %u, NO ddp.\n", ppm, ppm ? ppm->tformat.pgsz_idx_dflt : DDP_PGIDX_MAX, xferlen, ttinfo->nents); return -EINVAL; } /* make sure the buffer is suitable for ddp */ if (cxgbi_ddp_sgl_check(sgl, sgcnt) < 0) return -EINVAL; ttinfo->nr_pages = (xferlen + sgl->offset + (1 << PAGE_SHIFT) - 1) >> PAGE_SHIFT; /* * the ddp tag will be used for the itt in the outgoing pdu, * the itt genrated by libiscsi is saved in the ppm and can be * retrieved via the ddp tag */ err = cxgbi_ppm_ppods_reserve(ppm, ttinfo->nr_pages, 0, &ttinfo->idx, &ttinfo->tag, (unsigned long)sw_tag); if (err < 0) { cconn->ddp_full++; return err; } ttinfo->npods = err; /* setup dma from scsi command sgl */ sgl->offset = 0; err = dma_map_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE); sgl->offset = sg_offset; if (err == 0) { pr_info("%s: 0x%x, xfer %u, sgl %u dma mapping err.\n", __func__, sw_tag, xferlen, sgcnt); goto rel_ppods; } if (err != ttinfo->nr_pages) { log_debug(1 << CXGBI_DBG_DDP, "%s: sw tag 0x%x, xfer %u, sgl %u, dma count %d.\n", __func__, sw_tag, xferlen, sgcnt, err); } ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_MAPPED; ttinfo->cid = csk->port_id; cxgbi_ppm_make_ppod_hdr(ppm, ttinfo->tag, csk->tid, sgl->offset, xferlen, &ttinfo->hdr); if (cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ) { /* write ppod from xmit_pdu (of iscsi_scsi_command pdu) */ ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_VALID; } else { /* write ppod from control queue now */ err = cdev->csk_ddp_set_map(ppm, csk, ttinfo); if (err < 0) goto rel_ppods; } return 0; rel_ppods: cxgbi_ppm_ppod_release(ppm, ttinfo->idx); if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_MAPPED) { ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_MAPPED; dma_unmap_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE); } return -EINVAL; } 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_device *cdev = cconn->chba->cdev; struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); u32 tag = ntohl((__force u32)hdr_itt); log_debug(1 << CXGBI_DBG_DDP, "cdev 0x%p, task 0x%p, release tag 0x%x.\n", cdev, task, tag); if (sc && sc->sc_data_direction == DMA_FROM_DEVICE && cxgbi_ppm_is_ddp_tag(ppm, tag)) { struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; if (!(cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ)) cdev->csk_ddp_clear_map(cdev, ppm, ttinfo); cxgbi_ppm_ppod_release(ppm, ttinfo->idx); dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl, ttinfo->nents, DMA_FROM_DEVICE); } } static inline u32 cxgbi_build_sw_tag(u32 idx, u32 age) { /* assume idx and age both are < 0x7FFF (32767) */ return (idx << 16) | age; } 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_device *cdev = cconn->chba->cdev; struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); u32 sw_tag = cxgbi_build_sw_tag(task->itt, sess->age); u32 tag = 0; int err = -EINVAL; if (sc && sc->sc_data_direction == DMA_FROM_DEVICE) { struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; scmd_get_params(sc, &ttinfo->sgl, &ttinfo->nents, &tdata->dlen, 0); err = cxgbi_ddp_reserve(cconn, tdata, sw_tag, tdata->dlen); if (!err) tag = ttinfo->tag; else log_debug(1 << CXGBI_DBG_DDP, "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n", cconn->cep->csk, task, tdata->dlen, ttinfo->nents); } if (err < 0) { err = cxgbi_ppm_make_non_ddp_tag(ppm, sw_tag, &tag); if (err < 0) return err; } /* 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", 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; struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); u32 tag = ntohl((__force u32)itt); u32 sw_bits; if (ppm) { if (cxgbi_ppm_is_ddp_tag(ppm, tag)) sw_bits = cxgbi_ppm_get_tag_caller_data(ppm, tag); else sw_bits = cxgbi_ppm_decode_non_ddp_tag(ppm, tag); } else { sw_bits = tag; } cxgbi_decode_sw_tag(sw_bits, idx, age); 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 cxgbi_sock *csk, struct iscsi_conn *conn, struct sk_buff *skb) { struct iscsi_tcp_conn *tcp_conn = conn->dd_data; int err; 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; } if (cxgbi_skcb_test_flag(skb, SKCBF_RX_ISCSI_COMPL) && cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA_DDPD)) { /* If completion flag is set and data is directly * placed in to the host memory then update * task->exp_datasn to the datasn in completion * iSCSI hdr as T6 adapter generates completion only * for the last pdu of a sequence. */ itt_t itt = ((struct iscsi_data *)skb->data)->itt; struct iscsi_task *task = iscsi_itt_to_ctask(conn, itt); u32 data_sn = be32_to_cpu(((struct iscsi_data *) skb->data)->datasn); if (task && task->sc) { struct iscsi_tcp_task *tcp_task = task->dd_data; tcp_task->exp_datasn = data_sn; } } err = read_pdu_skb(conn, skb, 0, 0); if (likely(err >= 0)) { struct iscsi_hdr *hdr = (struct iscsi_hdr *)skb->data; u8 opcode = hdr->opcode & ISCSI_OPCODE_MASK; if (unlikely(opcode == ISCSI_OP_LOGOUT_RSP)) cxgbi_sock_set_flag(csk, CTPF_LOGOUT_RSP_RCVD); } return err; } 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%lx,%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, csk->rcv_win); if (!cdev->rx_credit_thres) return; if (csk->state != CTP_ESTABLISHED) return; credits = csk->copied_seq - csk->rcv_wup; if (unlikely(!credits)) return; must_send = credits + 16384 >= csk->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(csk, conn, skb); 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; } err = skb_read_pdu_data(conn, skb, skb, err + cdev->skb_rx_extra); 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)); } else { err = skb_read_pdu_bhs(csk, conn, skb); 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; } if (cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) { struct sk_buff *dskb; dskb = skb_peek(&csk->receive_queue); if (!dskb) { 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; } __skb_unlink(dskb, &csk->receive_queue); err = skb_read_pdu_data(conn, skb, dskb, 0); 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); __kfree_skb(dskb); } else err = skb_read_pdu_data(conn, skb, skb, 0); } skb_done: __kfree_skb(skb); 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) { pr_info("csk 0x%p, 0x%p, rx failed %d, read %u.\n", csk, conn, err, read); 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, struct page_frag *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].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].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; struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); struct scsi_cmnd *sc = task->sc; struct cxgbi_sock *csk = cconn->cep->csk; struct net_device *ndev = cdev->ports[csk->port_id]; 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 && 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) { ndev->stats.tx_dropped++; return -ENOMEM; } skb_reserve(tdata->skb, cdev->skb_tx_rsvd); if (task->sc) { task->hdr = (struct iscsi_hdr *)tdata->skb->data; } else { task->hdr = kzalloc(SKB_TX_ISCSI_PDU_HEADER_MAX, GFP_ATOMIC); if (!task->hdr) { __kfree_skb(tdata->skb); tdata->skb = NULL; ndev->stats.tx_dropped++; return -ENOMEM; } } 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) { if (hcrc || dcrc) { u8 submode = 0; 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; } int cxgbi_conn_init_pdu(struct iscsi_task *task, unsigned int offset, unsigned int count) { struct iscsi_conn *conn = task->conn; struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); 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 = &task->sc->sdb; 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; struct page_frag *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); memcpy(dst, src+frag->offset, frag->size); dst += frag->size; kunmap_atomic(src); } 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++) { __skb_fill_page_desc(skb, i, tdata->frags[i].page, tdata->frags[i].offset, tdata->frags[i].size); skb_frag_ref(skb, i); } 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; struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; struct sk_buff *skb = tdata->skb; struct cxgbi_sock *csk = NULL; unsigned int datalen; int err; if (!skb) { log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, "task 0x%p\n", task); return 0; } if (cconn && cconn->cep) csk = cconn->cep->csk; if (!csk) { log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, "task 0x%p, csk gone.\n", task); return -EPIPE; } tdata->skb = NULL; datalen = skb->data_len; /* write ppod first if using ofldq to write ppod */ if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_VALID) { struct cxgbi_ppm *ppm = csk->cdev->cdev2ppm(csk->cdev); ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_VALID; if (csk->cdev->csk_ddp_set_map(ppm, csk, ttinfo) < 0) pr_err("task 0x%p, ppod writing using ofldq failed.\n", task); /* continue. Let fl get the data */ } if (!task->sc) memcpy(skb->data, task->hdr, SKB_TX_ISCSI_PDU_HEADER_MAX); 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; } 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); __kfree_skb(skb); 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) { struct iscsi_tcp_task *tcp_task = task->dd_data; struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); if (!tcp_task || !tdata || (tcp_task->dd_data != tdata)) { pr_info("task 0x%p,0x%p, tcp_task 0x%p, tdata 0x%p/0x%p.\n", task, task->sc, tcp_task, tcp_task ? tcp_task->dd_data : NULL, tdata); return; } log_debug(1 << CXGBI_DBG_ISCSI, "task 0x%p, skb 0x%p, itt 0x%x.\n", task, tdata->skb, task->hdr_itt); tcp_task->dd_data = NULL; if (!task->sc) kfree(task->hdr); task->hdr = NULL; /* never reached the xmit task callout */ if (tdata->skb) { __kfree_skb(tdata->skb); tdata->skb = NULL; } task_release_itt(task, task->hdr_itt); memset(tdata, 0, sizeof(*tdata)); 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_tcp_conn *tcp_conn = conn->dd_data; struct cxgbi_conn *cconn = tcp_conn->dd_data; struct cxgbi_sock *csk = cconn->cep->csk; int err; 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); 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); break; case ISCSI_PARAM_MAX_R2T: return iscsi_tcp_set_max_r2t(conn, buf); 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); int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param, char *buf) { struct cxgbi_endpoint *cep = ep->dd_data; struct cxgbi_sock *csk; log_debug(1 << CXGBI_DBG_ISCSI, "cls_conn 0x%p, param %d.\n", ep, param); switch (param) { case ISCSI_PARAM_CONN_PORT: case ISCSI_PARAM_CONN_ADDRESS: if (!cep) return -ENOTCONN; csk = cep->csk; if (!csk) return -ENOTCONN; return iscsi_conn_get_addr_param((struct sockaddr_storage *) &csk->daddr, param, buf); default: break; } return -ENOSYS; } EXPORT_SYMBOL_GPL(cxgbi_get_ep_param); 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 cxgbi_ppm *ppm; 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; ppm = csk->cdev->cdev2ppm(csk->cdev); err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, ppm->tformat.pgsz_idx_dflt); 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; write_lock_bh(&csk->callback_lock); csk->user_data = conn; cconn->chba = cep->chba; cconn->cep = cep; cep->cconn = cconn; write_unlock_bh(&csk->callback_lock); 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: { struct cxgbi_sock *csk = find_sock_on_port(chba->cdev, chba->port_id); if (csk) { len = sprintf(buf, "%pIS", (struct sockaddr *)&csk->saddr); } log_debug(1 << CXGBI_DBG_ISCSI, "hba %s, addr %s.\n", chba->ndev->name, buf); 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 ifindex = 0; 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; } } check_route: if (dst_addr->sa_family == AF_INET) { csk = cxgbi_check_route(dst_addr, ifindex); #if IS_ENABLED(CONFIG_IPV6) } else if (dst_addr->sa_family == AF_INET6) { csk = cxgbi_check_route6(dst_addr, ifindex); #endif } else { pr_info("address family 0x%x NOT supported.\n", dst_addr->sa_family); err = -EAFNOSUPPORT; return (struct iscsi_endpoint *)ERR_PTR(err); } 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]) { if (ifindex != hba->ndev->ifindex) { cxgbi_sock_put(csk); cxgbi_sock_closed(csk); ifindex = hba->ndev->ifindex; goto check_route; } 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); umode_t cxgbi_attr_is_visible(int param_type, int param) { switch (param_type) { case ISCSI_HOST_PARAM: switch (param) { case ISCSI_HOST_PARAM_NETDEV_NAME: case ISCSI_HOST_PARAM_HWADDRESS: case ISCSI_HOST_PARAM_IPADDRESS: case ISCSI_HOST_PARAM_INITIATOR_NAME: return S_IRUGO; default: return 0; } case ISCSI_PARAM: switch (param) { case ISCSI_PARAM_MAX_RECV_DLENGTH: case ISCSI_PARAM_MAX_XMIT_DLENGTH: case ISCSI_PARAM_HDRDGST_EN: case ISCSI_PARAM_DATADGST_EN: case ISCSI_PARAM_CONN_ADDRESS: case ISCSI_PARAM_CONN_PORT: case ISCSI_PARAM_EXP_STATSN: case ISCSI_PARAM_PERSISTENT_ADDRESS: case ISCSI_PARAM_PERSISTENT_PORT: case ISCSI_PARAM_PING_TMO: case ISCSI_PARAM_RECV_TMO: case ISCSI_PARAM_INITIAL_R2T_EN: case ISCSI_PARAM_MAX_R2T: case ISCSI_PARAM_IMM_DATA_EN: case ISCSI_PARAM_FIRST_BURST: case ISCSI_PARAM_MAX_BURST: case ISCSI_PARAM_PDU_INORDER_EN: case ISCSI_PARAM_DATASEQ_INORDER_EN: case ISCSI_PARAM_ERL: case ISCSI_PARAM_TARGET_NAME: case ISCSI_PARAM_TPGT: case ISCSI_PARAM_USERNAME: case ISCSI_PARAM_PASSWORD: case ISCSI_PARAM_USERNAME_IN: case ISCSI_PARAM_PASSWORD_IN: case ISCSI_PARAM_FAST_ABORT: case ISCSI_PARAM_ABORT_TMO: case ISCSI_PARAM_LU_RESET_TMO: case ISCSI_PARAM_TGT_RESET_TMO: case ISCSI_PARAM_IFACE_NAME: case ISCSI_PARAM_INITIATOR_NAME: return S_IRUGO; default: return 0; } } return 0; } EXPORT_SYMBOL_GPL(cxgbi_attr_is_visible); static int __init libcxgbi_init_module(void) { pr_info("%s", version); BUILD_BUG_ON(sizeof_field(struct sk_buff, cb) < sizeof(struct cxgbi_skb_cb)); 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);
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