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OpenCloudOS-Kernel/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

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/*
* cxgb4i.c: Chelsio T4 iSCSI driver.
*
* Copyright (c) 2010 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)
* Rakesh Ranjan (rranjan@chelsio.com)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <scsi/scsi_host.h>
#include <net/tcp.h>
#include <net/dst.h>
#include <linux/netdevice.h>
#include <net/addrconf.h>
#include "t4_regs.h"
#include "t4_msg.h"
#include "cxgb4.h"
#include "cxgb4_uld.h"
#include "t4fw_api.h"
#include "l2t.h"
#include "cxgb4i.h"
static unsigned int dbg_level;
#include "../libcxgbi.h"
#define DRV_MODULE_NAME "cxgb4i"
#define DRV_MODULE_DESC "Chelsio T4/T5 iSCSI Driver"
#define DRV_MODULE_VERSION "0.9.4"
static char version[] =
DRV_MODULE_DESC " " DRV_MODULE_NAME
" v" DRV_MODULE_VERSION "\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, "Debug flag (default=0)");
static int cxgb4i_rcv_win = 256 * 1024;
module_param(cxgb4i_rcv_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");
static int cxgb4i_snd_win = 128 * 1024;
module_param(cxgb4i_snd_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");
static int cxgb4i_rx_credit_thres = 10 * 1024;
module_param(cxgb4i_rx_credit_thres, int, 0644);
MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
"RX credits return threshold in bytes (default=10KB)");
static unsigned int cxgb4i_max_connect = (8 * 1024);
module_param(cxgb4i_max_connect, uint, 0644);
MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");
static unsigned short cxgb4i_sport_base = 20000;
module_param(cxgb4i_sport_base, ushort, 0644);
MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");
typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
static void *t4_uld_add(const struct cxgb4_lld_info *);
static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
static int t4_uld_state_change(void *, enum cxgb4_state state);
static const struct cxgb4_uld_info cxgb4i_uld_info = {
.name = DRV_MODULE_NAME,
.add = t4_uld_add,
.rx_handler = t4_uld_rx_handler,
.state_change = t4_uld_state_change,
};
static struct scsi_host_template cxgb4i_host_template = {
.module = THIS_MODULE,
.name = DRV_MODULE_NAME,
.proc_name = DRV_MODULE_NAME,
.can_queue = CXGB4I_SCSI_HOST_QDEPTH,
.queuecommand = iscsi_queuecommand,
.change_queue_depth = iscsi_change_queue_depth,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler = iscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_recover_target,
.target_alloc = iscsi_target_alloc,
.use_clustering = DISABLE_CLUSTERING,
.this_id = -1,
};
static struct iscsi_transport cxgb4i_iscsi_transport = {
.owner = THIS_MODULE,
.name = DRV_MODULE_NAME,
.caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST |
CAP_DATADGST | CAP_DIGEST_OFFLOAD |
CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
.attr_is_visible = cxgbi_attr_is_visible,
.get_host_param = cxgbi_get_host_param,
.set_host_param = cxgbi_set_host_param,
/* session management */
.create_session = cxgbi_create_session,
.destroy_session = cxgbi_destroy_session,
.get_session_param = iscsi_session_get_param,
/* connection management */
.create_conn = cxgbi_create_conn,
.bind_conn = cxgbi_bind_conn,
.destroy_conn = iscsi_tcp_conn_teardown,
.start_conn = iscsi_conn_start,
.stop_conn = iscsi_conn_stop,
.get_conn_param = iscsi_conn_get_param,
.set_param = cxgbi_set_conn_param,
.get_stats = cxgbi_get_conn_stats,
/* pdu xmit req from user space */
.send_pdu = iscsi_conn_send_pdu,
/* task */
.init_task = iscsi_tcp_task_init,
.xmit_task = iscsi_tcp_task_xmit,
.cleanup_task = cxgbi_cleanup_task,
/* pdu */
.alloc_pdu = cxgbi_conn_alloc_pdu,
.init_pdu = cxgbi_conn_init_pdu,
.xmit_pdu = cxgbi_conn_xmit_pdu,
.parse_pdu_itt = cxgbi_parse_pdu_itt,
/* TCP connect/disconnect */
.get_ep_param = cxgbi_get_ep_param,
.ep_connect = cxgbi_ep_connect,
.ep_poll = cxgbi_ep_poll,
.ep_disconnect = cxgbi_ep_disconnect,
/* Error recovery timeout call */
.session_recovery_timedout = iscsi_session_recovery_timedout,
};
static struct scsi_transport_template *cxgb4i_stt;
/*
* CPL (Chelsio Protocol Language) defines a message passing interface between
* the host driver and Chelsio asic.
* The section below implments CPLs that related to iscsi tcp connection
* open/close/abort and data send/receive.
*/
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
#define RCV_BUFSIZ_MASK 0x3FFU
#define MAX_IMM_TX_PKT_LEN 128
static inline void set_queue(struct sk_buff *skb, unsigned int queue,
const struct cxgbi_sock *csk)
{
skb->queue_mapping = queue;
}
static int push_tx_frames(struct cxgbi_sock *, int);
/*
* is_ofld_imm - check whether a packet can be sent as immediate data
* @skb: the packet
*
* Returns true if a packet can be sent as an offload WR with immediate
* data. We currently use the same limit as for Ethernet packets.
*/
static inline int is_ofld_imm(const struct sk_buff *skb)
{
return skb->len <= (MAX_IMM_TX_PKT_LEN -
sizeof(struct fw_ofld_tx_data_wr));
}
static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
struct l2t_entry *e)
{
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
int t4 = is_t4(lldi->adapter_type);
int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
unsigned long long opt0;
unsigned int opt2;
unsigned int qid_atid = ((unsigned int)csk->atid) |
(((unsigned int)csk->rss_qid) << 14);
opt0 = KEEP_ALIVE(1) |
WND_SCALE(wscale) |
MSS_IDX(csk->mss_idx) |
L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
TX_CHAN(csk->tx_chan) |
SMAC_SEL(csk->smac_idx) |
ULP_MODE(ULP_MODE_ISCSI) |
RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
opt2 = RX_CHANNEL(0) |
RSS_QUEUE_VALID |
(1 << 20) |
RSS_QUEUE(csk->rss_qid);
if (is_t4(lldi->adapter_type)) {
struct cpl_act_open_req *req =
(struct cpl_act_open_req *)skb->head;
INIT_TP_WR(req, 0);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
qid_atid));
req->local_port = csk->saddr.sin_port;
req->peer_port = csk->daddr.sin_port;
req->local_ip = csk->saddr.sin_addr.s_addr;
req->peer_ip = csk->daddr.sin_addr.s_addr;
req->opt0 = cpu_to_be64(opt0);
req->params = cpu_to_be32(cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t));
opt2 |= 1 << 22;
req->opt2 = cpu_to_be32(opt2);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk t4 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
csk, &req->local_ip, ntohs(req->local_port),
&req->peer_ip, ntohs(req->peer_port),
csk->atid, csk->rss_qid);
} else {
struct cpl_t5_act_open_req *req =
(struct cpl_t5_act_open_req *)skb->head;
INIT_TP_WR(req, 0);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
qid_atid));
req->local_port = csk->saddr.sin_port;
req->peer_port = csk->daddr.sin_port;
req->local_ip = csk->saddr.sin_addr.s_addr;
req->peer_ip = csk->daddr.sin_addr.s_addr;
req->opt0 = cpu_to_be64(opt0);
req->params = cpu_to_be64(V_FILTER_TUPLE(
cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t)));
opt2 |= 1 << 31;
req->opt2 = cpu_to_be32(opt2);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
csk, &req->local_ip, ntohs(req->local_port),
&req->peer_ip, ntohs(req->peer_port),
csk->atid, csk->rss_qid);
}
set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
(&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
csk->state, csk->flags, csk->atid, csk->rss_qid);
cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}
#if IS_ENABLED(CONFIG_IPV6)
static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
struct l2t_entry *e)
{
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
int t4 = is_t4(lldi->adapter_type);
int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
unsigned long long opt0;
unsigned int opt2;
unsigned int qid_atid = ((unsigned int)csk->atid) |
(((unsigned int)csk->rss_qid) << 14);
opt0 = KEEP_ALIVE(1) |
WND_SCALE(wscale) |
MSS_IDX(csk->mss_idx) |
L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
TX_CHAN(csk->tx_chan) |
SMAC_SEL(csk->smac_idx) |
ULP_MODE(ULP_MODE_ISCSI) |
RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
opt2 = RX_CHANNEL(0) |
RSS_QUEUE_VALID |
RX_FC_DISABLE |
RSS_QUEUE(csk->rss_qid);
if (t4) {
struct cpl_act_open_req6 *req =
(struct cpl_act_open_req6 *)skb->head;
INIT_TP_WR(req, 0);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
qid_atid));
req->local_port = csk->saddr6.sin6_port;
req->peer_port = csk->daddr6.sin6_port;
req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
8);
req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
8);
req->opt0 = cpu_to_be64(opt0);
opt2 |= RX_FC_VALID;
req->opt2 = cpu_to_be32(opt2);
req->params = cpu_to_be32(cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t));
} else {
struct cpl_t5_act_open_req6 *req =
(struct cpl_t5_act_open_req6 *)skb->head;
INIT_TP_WR(req, 0);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
qid_atid));
req->local_port = csk->saddr6.sin6_port;
req->peer_port = csk->daddr6.sin6_port;
req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
8);
req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
8);
req->opt0 = cpu_to_be64(opt0);
opt2 |= T5_OPT_2_VALID;
req->opt2 = cpu_to_be32(opt2);
req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t)));
}
set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
&csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
&csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
csk->rss_qid);
cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}
#endif
static void send_close_req(struct cxgbi_sock *csk)
{
struct sk_buff *skb = csk->cpl_close;
struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head;
unsigned int tid = csk->tid;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx, tid %u.\n",
csk, csk->state, csk->flags, csk->tid);
csk->cpl_close = NULL;
set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
INIT_TP_WR(req, tid);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid));
req->rsvd = 0;
cxgbi_sock_skb_entail(csk, skb);
if (csk->state >= CTP_ESTABLISHED)
push_tx_frames(csk, 1);
}
static void abort_arp_failure(void *handle, struct sk_buff *skb)
{
struct cxgbi_sock *csk = (struct cxgbi_sock *)handle;
struct cpl_abort_req *req;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx, tid %u, abort.\n",
csk, csk->state, csk->flags, csk->tid);
req = (struct cpl_abort_req *)skb->data;
req->cmd = CPL_ABORT_NO_RST;
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
}
static void send_abort_req(struct cxgbi_sock *csk)
{
struct cpl_abort_req *req;
struct sk_buff *skb = csk->cpl_abort_req;
if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
return;
cxgbi_sock_set_state(csk, CTP_ABORTING);
cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
cxgbi_sock_purge_write_queue(csk);
csk->cpl_abort_req = NULL;
req = (struct cpl_abort_req *)skb->head;
set_queue(skb, CPL_PRIORITY_DATA, csk);
req->cmd = CPL_ABORT_SEND_RST;
t4_set_arp_err_handler(skb, csk, abort_arp_failure);
INIT_TP_WR(req, csk->tid);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
req->rsvd0 = htonl(csk->snd_nxt);
req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n",
csk, csk->state, csk->flags, csk->tid, csk->snd_nxt,
req->rsvd1);
cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}
static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status)
{
struct sk_buff *skb = csk->cpl_abort_rpl;
struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u, status %d.\n",
csk, csk->state, csk->flags, csk->tid, rst_status);
csk->cpl_abort_rpl = NULL;
set_queue(skb, CPL_PRIORITY_DATA, csk);
INIT_TP_WR(rpl, csk->tid);
OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
rpl->cmd = rst_status;
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
}
/*
* CPL connection rx data ack: host ->
* Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
* credits sent.
*/
static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
{
struct sk_buff *skb;
struct cpl_rx_data_ack *req;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
"csk 0x%p,%u,0x%lx,%u, credit %u.\n",
csk, csk->state, csk->flags, csk->tid, credits);
skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
if (!skb) {
pr_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
return 0;
}
req = (struct cpl_rx_data_ack *)skb->head;
set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
INIT_TP_WR(req, csk->tid);
OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
csk->tid));
req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
return credits;
}
/*
* sgl_len - calculates the size of an SGL of the given capacity
* @n: the number of SGL entries
* Calculates the number of flits needed for a scatter/gather list that
* can hold the given number of entries.
*/
static inline unsigned int sgl_len(unsigned int n)
{
n--;
return (3 * n) / 2 + (n & 1) + 2;
}
/*
* calc_tx_flits_ofld - calculate # of flits for an offload packet
* @skb: the packet
*
* Returns the number of flits needed for the given offload packet.
* These packets are already fully constructed and no additional headers
* will be added.
*/
static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
{
unsigned int flits, cnt;
if (is_ofld_imm(skb))
return DIV_ROUND_UP(skb->len, 8);
flits = skb_transport_offset(skb) / 8;
cnt = skb_shinfo(skb)->nr_frags;
if (skb_tail_pointer(skb) != skb_transport_header(skb))
cnt++;
return flits + sgl_len(cnt);
}
static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
{
struct sk_buff *skb;
struct fw_flowc_wr *flowc;
int flowclen, i;
flowclen = 80;
skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
flowc = (struct fw_flowc_wr *)skb->head;
flowc->op_to_nparams =
htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
flowc->flowid_len16 =
htonl(FW_WR_LEN16(DIV_ROUND_UP(72, 16)) |
FW_WR_FLOWID(csk->tid));
flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
flowc->mnemval[1].val = htonl(csk->tx_chan);
flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
flowc->mnemval[2].val = htonl(csk->tx_chan);
flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
flowc->mnemval[3].val = htonl(csk->rss_qid);
flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
flowc->mnemval[4].val = htonl(csk->snd_nxt);
flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
flowc->mnemval[5].val = htonl(csk->rcv_nxt);
flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
flowc->mnemval[7].val = htonl(csk->advmss);
flowc->mnemval[8].mnemonic = 0;
flowc->mnemval[8].val = 0;
for (i = 0; i < 9; i++) {
flowc->mnemval[i].r4[0] = 0;
flowc->mnemval[i].r4[1] = 0;
flowc->mnemval[i].r4[2] = 0;
}
set_queue(skb, CPL_PRIORITY_DATA, csk);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
csk->advmss);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
}
static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
int dlen, int len, u32 credits, int compl)
{
struct fw_ofld_tx_data_wr *req;
unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
unsigned int wr_ulp_mode = 0;
req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
if (is_ofld_imm(skb)) {
req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
FW_WR_COMPL(1) |
FW_WR_IMMDLEN(dlen));
req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
FW_WR_LEN16(credits));
} else {
req->op_to_immdlen =
cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
FW_WR_COMPL(1) |
FW_WR_IMMDLEN(0));
req->flowid_len16 =
cpu_to_be32(FW_WR_FLOWID(csk->tid) |
FW_WR_LEN16(credits));
}
if (submode)
wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
req->tunnel_to_proxy = htonl(wr_ulp_mode |
FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1));
req->plen = htonl(len);
if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
}
static void arp_failure_skb_discard(void *handle, struct sk_buff *skb)
{
kfree_skb(skb);
}
static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
{
int total_size = 0;
struct sk_buff *skb;
if (unlikely(csk->state < CTP_ESTABLISHED ||
csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) {
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK |
1 << CXGBI_DBG_PDU_TX,
"csk 0x%p,%u,0x%lx,%u, in closing state.\n",
csk, csk->state, csk->flags, csk->tid);
return 0;
}
while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
int dlen = skb->len;
int len = skb->len;
unsigned int credits_needed;
skb_reset_transport_header(skb);
if (is_ofld_imm(skb))
credits_needed = DIV_ROUND_UP(dlen +
sizeof(struct fw_ofld_tx_data_wr), 16);
else
credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
+ sizeof(struct fw_ofld_tx_data_wr),
16);
if (csk->wr_cred < credits_needed) {
log_debug(1 << CXGBI_DBG_PDU_TX,
"csk 0x%p, skb %u/%u, wr %d < %u.\n",
csk, skb->len, skb->data_len,
credits_needed, csk->wr_cred);
break;
}
__skb_unlink(skb, &csk->write_queue);
set_queue(skb, CPL_PRIORITY_DATA, csk);
skb->csum = credits_needed;
csk->wr_cred -= credits_needed;
csk->wr_una_cred += credits_needed;
cxgbi_sock_enqueue_wr(csk, skb);
log_debug(1 << CXGBI_DBG_PDU_TX,
"csk 0x%p, skb %u/%u, wr %d, left %u, unack %u.\n",
csk, skb->len, skb->data_len, credits_needed,
csk->wr_cred, csk->wr_una_cred);
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
send_tx_flowc_wr(csk);
skb->csum += 5;
csk->wr_cred -= 5;
csk->wr_una_cred += 5;
}
len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb));
make_tx_data_wr(csk, skb, dlen, len, credits_needed,
req_completion);
csk->snd_nxt += len;
cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR);
}
total_size += skb->truesize;
t4_set_arp_err_handler(skb, csk, arp_failure_skb_discard);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_TX,
"csk 0x%p,%u,0x%lx,%u, skb 0x%p, %u.\n",
csk, csk->state, csk->flags, csk->tid, skb, len);
cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}
return total_size;
}
static inline void free_atid(struct cxgbi_sock *csk)
{
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
cxgb4_free_atid(lldi->tids, csk->atid);
cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
cxgbi_sock_put(csk);
}
}
static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
unsigned short tcp_opt = ntohs(req->tcp_opt);
unsigned int tid = GET_TID(req);
unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
u32 rcv_isn = be32_to_cpu(req->rcv_isn);
csk = lookup_atid(t, atid);
if (unlikely(!csk)) {
pr_err("NO conn. for atid %u, cdev 0x%p.\n", atid, cdev);
goto rel_skb;
}
if (csk->atid != atid) {
pr_err("bad conn atid %u, csk 0x%p,%u,0x%lx,tid %u, atid %u.\n",
atid, csk, csk->state, csk->flags, csk->tid, csk->atid);
goto rel_skb;
}
pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
(&csk->saddr), (&csk->daddr),
atid, tid, csk, csk->state, csk->flags, rcv_isn);
module_put(THIS_MODULE);
cxgbi_sock_get(csk);
csk->tid = tid;
cxgb4_insert_tid(lldi->tids, csk, tid);
cxgbi_sock_set_flag(csk, CTPF_HAS_TID);
free_atid(csk);
spin_lock_bh(&csk->lock);
if (unlikely(csk->state != CTP_ACTIVE_OPEN))
pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
csk, csk->state, csk->flags, csk->tid);
if (csk->retry_timer.function) {
del_timer(&csk->retry_timer);
csk->retry_timer.function = NULL;
}
csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
/*
* Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
* pass through opt0.
*/
if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
if (GET_TCPOPT_TSTAMP(tcp_opt))
csk->advmss -= 12;
if (csk->advmss < 128)
csk->advmss = 128;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p, mss_idx %u, advmss %u.\n",
csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
send_abort_req(csk);
else {
if (skb_queue_len(&csk->write_queue))
push_tx_frames(csk, 0);
cxgbi_conn_tx_open(csk);
}
spin_unlock_bh(&csk->lock);
rel_skb:
__kfree_skb(skb);
}
static int act_open_rpl_status_to_errno(int status)
{
switch (status) {
case CPL_ERR_CONN_RESET:
return -ECONNREFUSED;
case CPL_ERR_ARP_MISS:
return -EHOSTUNREACH;
case CPL_ERR_CONN_TIMEDOUT:
return -ETIMEDOUT;
case CPL_ERR_TCAM_FULL:
return -ENOMEM;
case CPL_ERR_CONN_EXIST:
return -EADDRINUSE;
default:
return -EIO;
}
}
static void csk_act_open_retry_timer(unsigned long data)
{
struct sk_buff *skb = NULL;
struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
struct l2t_entry *);
int t4 = is_t4(lldi->adapter_type), size, size6;
log_debug(1 << CXGBI_DBG_TOE | 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 (t4) {
size = sizeof(struct cpl_act_open_req);
size6 = sizeof(struct cpl_act_open_req6);
} else {
size = sizeof(struct cpl_t5_act_open_req);
size6 = sizeof(struct cpl_t5_act_open_req6);
}
if (csk->csk_family == AF_INET) {
send_act_open_func = send_act_open_req;
skb = alloc_wr(size, 0, GFP_ATOMIC);
#if IS_ENABLED(CONFIG_IPV6)
} else {
send_act_open_func = send_act_open_req6;
skb = alloc_wr(size6, 0, GFP_ATOMIC);
#endif
}
if (!skb)
cxgbi_sock_fail_act_open(csk, -ENOMEM);
else {
skb->sk = (struct sock *)csk;
t4_set_arp_err_handler(skb, csk,
cxgbi_sock_act_open_req_arp_failure);
send_act_open_func(csk, skb, csk->l2t);
}
spin_unlock_bh(&csk->lock);
cxgbi_sock_put(csk);
}
static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
unsigned int tid = GET_TID(rpl);
unsigned int atid =
GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
csk = lookup_atid(t, atid);
if (unlikely(!csk)) {
pr_err("NO matching conn. atid %u, tid %u.\n", atid, tid);
goto rel_skb;
}
pr_info_ipaddr("tid %u/%u, status %u.\n"
"csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
atid, tid, status, csk, csk->state, csk->flags);
if (status == CPL_ERR_RTX_NEG_ADVICE)
goto rel_skb;
if (status && status != CPL_ERR_TCAM_FULL &&
status != CPL_ERR_CONN_EXIST &&
status != CPL_ERR_ARP_MISS)
cxgb4_remove_tid(lldi->tids, csk->port_id, GET_TID(rpl));
cxgbi_sock_get(csk);
spin_lock_bh(&csk->lock);
if (status == CPL_ERR_CONN_EXIST &&
csk->retry_timer.function != csk_act_open_retry_timer) {
csk->retry_timer.function = csk_act_open_retry_timer;
mod_timer(&csk->retry_timer, jiffies + HZ / 2);
} else
cxgbi_sock_fail_act_open(csk,
act_open_rpl_status_to_errno(status));
spin_unlock_bh(&csk->lock);
cxgbi_sock_put(csk);
rel_skb:
__kfree_skb(skb);
}
static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_peer_close *req = (struct cpl_peer_close *)skb->data;
unsigned int tid = GET_TID(req);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
csk = lookup_tid(t, tid);
if (unlikely(!csk)) {
pr_err("can't find connection for tid %u.\n", tid);
goto rel_skb;
}
pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
(&csk->saddr), (&csk->daddr),
csk, csk->state, csk->flags, csk->tid);
cxgbi_sock_rcv_peer_close(csk);
rel_skb:
__kfree_skb(skb);
}
static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_close_con_rpl *rpl = (struct cpl_close_con_rpl *)skb->data;
unsigned int tid = GET_TID(rpl);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
csk = lookup_tid(t, tid);
if (unlikely(!csk)) {
pr_err("can't find connection for tid %u.\n", tid);
goto rel_skb;
}
pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
(&csk->saddr), (&csk->daddr),
csk, csk->state, csk->flags, csk->tid);
cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
rel_skb:
__kfree_skb(skb);
}
static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
int *need_rst)
{
switch (abort_reason) {
case CPL_ERR_BAD_SYN: /* fall through */
case CPL_ERR_CONN_RESET:
return csk->state > CTP_ESTABLISHED ?
-EPIPE : -ECONNRESET;
case CPL_ERR_XMIT_TIMEDOUT:
case CPL_ERR_PERSIST_TIMEDOUT:
case CPL_ERR_FINWAIT2_TIMEDOUT:
case CPL_ERR_KEEPALIVE_TIMEDOUT:
return -ETIMEDOUT;
default:
return -EIO;
}
}
static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_abort_req_rss *req = (struct cpl_abort_req_rss *)skb->data;
unsigned int tid = GET_TID(req);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
int rst_status = CPL_ABORT_NO_RST;
csk = lookup_tid(t, tid);
if (unlikely(!csk)) {
pr_err("can't find connection for tid %u.\n", tid);
goto rel_skb;
}
pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
(&csk->saddr), (&csk->daddr),
csk, csk->state, csk->flags, csk->tid, req->status);
if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
req->status == CPL_ERR_PERSIST_NEG_ADVICE)
goto rel_skb;
cxgbi_sock_get(csk);
spin_lock_bh(&csk->lock);
if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
cxgbi_sock_set_state(csk, CTP_ABORTING);
goto done;
}
cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
send_abort_rpl(csk, rst_status);
if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
csk->err = abort_status_to_errno(csk, req->status, &rst_status);
cxgbi_sock_closed(csk);
}
done:
spin_unlock_bh(&csk->lock);
cxgbi_sock_put(csk);
rel_skb:
__kfree_skb(skb);
}
static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
unsigned int tid = GET_TID(rpl);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
csk = lookup_tid(t, tid);
if (!csk)
goto rel_skb;
if (csk)
pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
(&csk->saddr), (&csk->daddr), csk,
csk->state, csk->flags, csk->tid, rpl->status);
if (rpl->status == CPL_ERR_ABORT_FAILED)
goto rel_skb;
cxgbi_sock_rcv_abort_rpl(csk);
rel_skb:
__kfree_skb(skb);
}
static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
unsigned int tid = GET_TID(cpl);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
csk = lookup_tid(t, tid);
if (unlikely(!csk)) {
pr_err("can't find conn. for tid %u.\n", tid);
goto rel_skb;
}
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
"csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
csk, csk->state, csk->flags, csk->tid, skb, skb->len,
pdu_len_ddp);
spin_lock_bh(&csk->lock);
if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u, bad state.\n",
csk, csk->state, csk->flags, csk->tid);
if (csk->state != CTP_ABORTING)
goto abort_conn;
else
goto discard;
}
cxgbi_skcb_tcp_seq(skb) = ntohl(cpl->seq);
cxgbi_skcb_flags(skb) = 0;
skb_reset_transport_header(skb);
__skb_pull(skb, sizeof(*cpl));
__pskb_trim(skb, ntohs(cpl->len));
if (!csk->skb_ulp_lhdr) {
unsigned char *bhs;
unsigned int hlen, dlen, plen;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
"csk 0x%p,%u,0x%lx, tid %u, skb 0x%p header.\n",
csk, csk->state, csk->flags, csk->tid, skb);
csk->skb_ulp_lhdr = skb;
cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
csk->tid, cxgbi_skcb_tcp_seq(skb),
csk->rcv_nxt);
goto abort_conn;
}
bhs = skb->data;
hlen = ntohs(cpl->len);
dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
plen = ISCSI_PDU_LEN(pdu_len_ddp);
if (is_t4(lldi->adapter_type))
plen -= 40;
if ((hlen + dlen) != plen) {
pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
"mismatch %u != %u + %u, seq 0x%x.\n",
csk->tid, plen, hlen, dlen,
cxgbi_skcb_tcp_seq(skb));
goto abort_conn;
}
cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
if (dlen)
cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
"csk 0x%p, skb 0x%p, 0x%x,%u+%u,0x%x,0x%x.\n",
csk, skb, *bhs, hlen, dlen,
ntohl(*((unsigned int *)(bhs + 16))),
ntohl(*((unsigned int *)(bhs + 24))));
} else {
struct sk_buff *lskb = csk->skb_ulp_lhdr;
cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
"csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
csk, csk->state, csk->flags, skb, lskb);
}
__skb_queue_tail(&csk->receive_queue, skb);
spin_unlock_bh(&csk->lock);
return;
abort_conn:
send_abort_req(csk);
discard:
spin_unlock_bh(&csk->lock);
rel_skb:
__kfree_skb(skb);
}
static void do_rx_data_ddp(struct cxgbi_device *cdev,
struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct sk_buff *lskb;
struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
unsigned int tid = GET_TID(rpl);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
unsigned int status = ntohl(rpl->ddpvld);
csk = lookup_tid(t, tid);
if (unlikely(!csk)) {
pr_err("can't find connection for tid %u.\n", tid);
goto rel_skb;
}
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
"csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
spin_lock_bh(&csk->lock);
if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u, bad state.\n",
csk, csk->state, csk->flags, csk->tid);
if (csk->state != CTP_ABORTING)
goto abort_conn;
else
goto discard;
}
if (!csk->skb_ulp_lhdr) {
pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
goto abort_conn;
}
lskb = csk->skb_ulp_lhdr;
csk->skb_ulp_lhdr = NULL;
cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
csk, lskb, status, cxgbi_skcb_flags(lskb));
cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
}
if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
csk, lskb, status, cxgbi_skcb_flags(lskb));
cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
}
if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
log_debug(1 << CXGBI_DBG_PDU_RX,
"csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
csk, lskb, status);
cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
}
if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
!cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
log_debug(1 << CXGBI_DBG_PDU_RX,
"csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
csk, lskb, status);
cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
}
log_debug(1 << CXGBI_DBG_PDU_RX,
"csk 0x%p, lskb 0x%p, f 0x%lx.\n",
csk, lskb, cxgbi_skcb_flags(lskb));
cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
cxgbi_conn_pdu_ready(csk);
spin_unlock_bh(&csk->lock);
goto rel_skb;
abort_conn:
send_abort_req(csk);
discard:
spin_unlock_bh(&csk->lock);
rel_skb:
__kfree_skb(skb);
}
static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
unsigned int tid = GET_TID(rpl);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
csk = lookup_tid(t, tid);
if (unlikely(!csk))
pr_err("can't find connection for tid %u.\n", tid);
else {
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u.\n",
csk, csk->state, csk->flags, csk->tid);
cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
rpl->seq_vld);
}
__kfree_skb(skb);
}
static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
unsigned int tid = GET_TID(rpl);
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
struct cxgbi_sock *csk;
csk = lookup_tid(t, tid);
if (!csk)
pr_err("can't find conn. for tid %u.\n", tid);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,%lx,%u, status 0x%x.\n",
csk, csk->state, csk->flags, csk->tid, rpl->status);
if (rpl->status != CPL_ERR_NONE)
pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
csk, tid, rpl->status);
__kfree_skb(skb);
}
static int alloc_cpls(struct cxgbi_sock *csk)
{
csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
0, GFP_KERNEL);
if (!csk->cpl_close)
return -ENOMEM;
csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
0, GFP_KERNEL);
if (!csk->cpl_abort_req)
goto free_cpls;
csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
0, GFP_KERNEL);
if (!csk->cpl_abort_rpl)
goto free_cpls;
return 0;
free_cpls:
cxgbi_sock_free_cpl_skbs(csk);
return -ENOMEM;
}
static inline void l2t_put(struct cxgbi_sock *csk)
{
if (csk->l2t) {
cxgb4_l2t_release(csk->l2t);
csk->l2t = NULL;
cxgbi_sock_put(csk);
}
}
static void release_offload_resources(struct cxgbi_sock *csk)
{
struct cxgb4_lld_info *lldi;
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u.\n",
csk, csk->state, csk->flags, csk->tid);
cxgbi_sock_free_cpl_skbs(csk);
if (csk->wr_cred != csk->wr_max_cred) {
cxgbi_sock_purge_wr_queue(csk);
cxgbi_sock_reset_wr_list(csk);
}
l2t_put(csk);
if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
free_atid(csk);
else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
lldi = cxgbi_cdev_priv(csk->cdev);
cxgb4_remove_tid(lldi->tids, 0, csk->tid);
cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
cxgbi_sock_put(csk);
}
csk->dst = NULL;
csk->cdev = NULL;
}
static int init_act_open(struct cxgbi_sock *csk)
{
struct cxgbi_device *cdev = csk->cdev;
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct net_device *ndev = cdev->ports[csk->port_id];
struct sk_buff *skb = NULL;
struct neighbour *n = NULL;
void *daddr;
unsigned int step;
unsigned int size, size6;
int t4 = is_t4(lldi->adapter_type);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p,%u,0x%lx,%u.\n",
csk, csk->state, csk->flags, csk->tid);
if (csk->csk_family == AF_INET)
daddr = &csk->daddr.sin_addr.s_addr;
#if IS_ENABLED(CONFIG_IPV6)
else if (csk->csk_family == AF_INET6)
daddr = &csk->daddr6.sin6_addr;
#endif
else {
pr_err("address family 0x%x not supported\n", csk->csk_family);
goto rel_resource;
}
n = dst_neigh_lookup(csk->dst, daddr);
if (!n) {
pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
goto rel_resource;
}
csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
if (csk->atid < 0) {
pr_err("%s, NO atid available.\n", ndev->name);
return -EINVAL;
}
cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
cxgbi_sock_get(csk);
csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
if (!csk->l2t) {
pr_err("%s, cannot alloc l2t.\n", ndev->name);
goto rel_resource;
}
cxgbi_sock_get(csk);
if (t4) {
size = sizeof(struct cpl_act_open_req);
size6 = sizeof(struct cpl_act_open_req6);
} else {
size = sizeof(struct cpl_t5_act_open_req);
size6 = sizeof(struct cpl_t5_act_open_req6);
}
if (csk->csk_family == AF_INET)
skb = alloc_wr(size, 0, GFP_NOIO);
#if IS_ENABLED(CONFIG_IPV6)
else
skb = alloc_wr(size6, 0, GFP_NOIO);
#endif
if (!skb)
goto rel_resource;
skb->sk = (struct sock *)csk;
t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
if (!csk->mtu)
csk->mtu = dst_mtu(csk->dst);
cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
csk->tx_chan = cxgb4_port_chan(ndev);
/* SMT two entries per row */
csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
step = lldi->ntxq / lldi->nchan;
csk->txq_idx = cxgb4_port_idx(ndev) * step;
step = lldi->nrxq / lldi->nchan;
csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
csk->wr_cred = lldi->wr_cred -
DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
csk->wr_max_cred = csk->wr_cred;
csk->wr_una_cred = 0;
cxgbi_sock_reset_wr_list(csk);
csk->err = 0;
pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
(&csk->saddr), (&csk->daddr), csk, csk->state,
csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
csk->mtu, csk->mss_idx, csk->smac_idx);
/* must wait for either a act_open_rpl or act_open_establish */
try_module_get(THIS_MODULE);
cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
if (csk->csk_family == AF_INET)
send_act_open_req(csk, skb, csk->l2t);
#if IS_ENABLED(CONFIG_IPV6)
else
send_act_open_req6(csk, skb, csk->l2t);
#endif
neigh_release(n);
return 0;
rel_resource:
if (n)
neigh_release(n);
if (skb)
__kfree_skb(skb);
return -EINVAL;
}
cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
[CPL_ACT_ESTABLISH] = do_act_establish,
[CPL_ACT_OPEN_RPL] = do_act_open_rpl,
[CPL_PEER_CLOSE] = do_peer_close,
[CPL_ABORT_REQ_RSS] = do_abort_req_rss,
[CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
[CPL_CLOSE_CON_RPL] = do_close_con_rpl,
[CPL_FW4_ACK] = do_fw4_ack,
[CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
[CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
[CPL_SET_TCB_RPL] = do_set_tcb_rpl,
[CPL_RX_DATA_DDP] = do_rx_data_ddp,
[CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
};
int cxgb4i_ofld_init(struct cxgbi_device *cdev)
{
int rc;
if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
cxgb4i_max_connect = CXGB4I_MAX_CONN;
rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
cxgb4i_max_connect);
if (rc < 0)
return rc;
cdev->csk_release_offload_resources = release_offload_resources;
cdev->csk_push_tx_frames = push_tx_frames;
cdev->csk_send_abort_req = send_abort_req;
cdev->csk_send_close_req = send_close_req;
cdev->csk_send_rx_credits = send_rx_credits;
cdev->csk_alloc_cpls = alloc_cpls;
cdev->csk_init_act_open = init_act_open;
pr_info("cdev 0x%p, offload up, added.\n", cdev);
return 0;
}
/*
* functions to program the pagepod in h/w
*/
#define ULPMEM_IDATA_MAX_NPPODS 4 /* 256/PPOD_SIZE */
static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
struct ulp_mem_io *req,
unsigned int wr_len, unsigned int dlen,
unsigned int pm_addr)
{
struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
INIT_ULPTX_WR(req, wr_len, 0, 0);
if (is_t4(lldi->adapter_type))
req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
(ULP_MEMIO_ORDER(1)));
else
req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE) |
(V_T5_ULP_MEMIO_IMM(1)));
req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
idata->cmd_more = htonl(ULPTX_CMD(ULP_TX_SC_IMM));
idata->len = htonl(dlen);
}
static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
unsigned int npods,
struct cxgbi_gather_list *gl,
unsigned int gl_pidx)
{
struct cxgbi_ddp_info *ddp = cdev->ddp;
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct sk_buff *skb;
struct ulp_mem_io *req;
struct ulptx_idata *idata;
struct cxgbi_pagepod *ppod;
unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
unsigned int dlen = PPOD_SIZE * npods;
unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
sizeof(struct ulptx_idata) + dlen, 16);
unsigned int i;
skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
if (!skb) {
pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
cdev, idx, npods);
return -ENOMEM;
}
req = (struct ulp_mem_io *)skb->head;
set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
idata = (struct ulptx_idata *)(req + 1);
ppod = (struct cxgbi_pagepod *)(idata + 1);
for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
if (!hdr && !gl)
cxgbi_ddp_ppod_clear(ppod);
else
cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
}
cxgb4_ofld_send(cdev->ports[port_id], skb);
return 0;
}
static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
unsigned int idx, unsigned int npods,
struct cxgbi_gather_list *gl)
{
unsigned int i, cnt;
int err = 0;
for (i = 0; i < npods; i += cnt, idx += cnt) {
cnt = npods - i;
if (cnt > ULPMEM_IDATA_MAX_NPPODS)
cnt = ULPMEM_IDATA_MAX_NPPODS;
err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
idx, cnt, gl, 4 * i);
if (err < 0)
break;
}
return err;
}
static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
unsigned int idx, unsigned int npods)
{
unsigned int i, cnt;
int err;
for (i = 0; i < npods; i += cnt, idx += cnt) {
cnt = npods - i;
if (cnt > ULPMEM_IDATA_MAX_NPPODS)
cnt = ULPMEM_IDATA_MAX_NPPODS;
err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
idx, cnt, NULL, 0);
if (err < 0)
break;
}
}
static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
int pg_idx, bool reply)
{
struct sk_buff *skb;
struct cpl_set_tcb_field *req;
if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
return 0;
skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
if (!skb)
return -ENOMEM;
/* set up ulp page size */
req = (struct cpl_set_tcb_field *)skb->head;
INIT_TP_WR(req, csk->tid);
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
req->word_cookie = htons(0);
req->mask = cpu_to_be64(0x3 << 8);
req->val = cpu_to_be64(pg_idx << 8);
set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p, tid 0x%x, pg_idx %u.\n", csk, csk->tid, pg_idx);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
return 0;
}
static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
int hcrc, int dcrc, int reply)
{
struct sk_buff *skb;
struct cpl_set_tcb_field *req;
if (!hcrc && !dcrc)
return 0;
skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
if (!skb)
return -ENOMEM;
csk->hcrc_len = (hcrc ? 4 : 0);
csk->dcrc_len = (dcrc ? 4 : 0);
/* set up ulp submode */
req = (struct cpl_set_tcb_field *)skb->head;
INIT_TP_WR(req, tid);
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
req->word_cookie = htons(0);
req->mask = cpu_to_be64(0x3 << 4);
req->val = cpu_to_be64(((hcrc ? ULP_CRC_HEADER : 0) |
(dcrc ? ULP_CRC_DATA : 0)) << 4);
set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
return 0;
}
static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
{
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct cxgbi_ddp_info *ddp = cdev->ddp;
unsigned int tagmask, pgsz_factor[4];
int err;
if (ddp) {
kref_get(&ddp->refcnt);
pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
cdev, cdev->ddp);
return -EALREADY;
}
err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
lldi->iscsi_iolen, lldi->iscsi_iolen);
if (err < 0)
return err;
ddp = cdev->ddp;
tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
cxgbi_ddp_page_size_factor(pgsz_factor);
cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);
cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
cdev->csk_ddp_set = ddp_set_map;
cdev->csk_ddp_clear = ddp_clear_map;
pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
" %u/%u.\n",
cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
ddp->max_rxsz, lldi->iscsi_iolen);
pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
ddp->max_rxsz);
return 0;
}
static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
{
struct cxgbi_device *cdev;
struct port_info *pi;
int i, rc;
cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
if (!cdev) {
pr_info("t4 device 0x%p, register failed.\n", lldi);
return NULL;
}
pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
cdev, lldi->adapter_type, lldi->nports,
lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
lldi->nrxq, lldi->wr_cred);
for (i = 0; i < lldi->nrxq; i++)
log_debug(1 << CXGBI_DBG_DEV,
"t4 0x%p, rxq id #%d: %u.\n",
cdev, i, lldi->rxq_ids[i]);
memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
cdev->flags = CXGBI_FLAG_DEV_T4;
cdev->pdev = lldi->pdev;
cdev->ports = lldi->ports;
cdev->nports = lldi->nports;
cdev->mtus = lldi->mtus;
cdev->nmtus = NMTUS;
cdev->snd_win = cxgb4i_snd_win;
cdev->rcv_win = cxgb4i_rcv_win;
cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
cdev->itp = &cxgb4i_iscsi_transport;
cdev->pfvf = FW_VIID_PFN_GET(cxgb4_port_viid(lldi->ports[0])) << 8;
pr_info("cdev 0x%p,%s, pfvf %u.\n",
cdev, lldi->ports[0]->name, cdev->pfvf);
rc = cxgb4i_ddp_init(cdev);
if (rc) {
pr_info("t4 0x%p ddp init failed.\n", cdev);
goto err_out;
}
rc = cxgb4i_ofld_init(cdev);
if (rc) {
pr_info("t4 0x%p ofld init failed.\n", cdev);
goto err_out;
}
rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, CXGBI_MAX_CONN,
&cxgb4i_host_template, cxgb4i_stt);
if (rc)
goto err_out;
for (i = 0; i < cdev->nports; i++) {
pi = netdev_priv(lldi->ports[i]);
cdev->hbas[i]->port_id = pi->port_id;
}
return cdev;
err_out:
cxgbi_device_unregister(cdev);
return ERR_PTR(-ENOMEM);
}
#define RX_PULL_LEN 128
static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
const struct pkt_gl *pgl)
{
const struct cpl_act_establish *rpl;
struct sk_buff *skb;
unsigned int opc;
struct cxgbi_device *cdev = handle;
if (pgl == NULL) {
unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
skb = alloc_wr(len, 0, GFP_ATOMIC);
if (!skb)
goto nomem;
skb_copy_to_linear_data(skb, &rsp[1], len);
} else {
if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n",
pgl->va, be64_to_cpu(*rsp),
be64_to_cpu(*(u64 *)pgl->va),
pgl->tot_len);
return 0;
}
skb = cxgb4_pktgl_to_skb(pgl, RX_PULL_LEN, RX_PULL_LEN);
if (unlikely(!skb))
goto nomem;
}
rpl = (struct cpl_act_establish *)skb->data;
opc = rpl->ot.opcode;
log_debug(1 << CXGBI_DBG_TOE,
"cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
if (cxgb4i_cplhandlers[opc])
cxgb4i_cplhandlers[opc](cdev, skb);
else {
pr_err("No handler for opcode 0x%x.\n", opc);
__kfree_skb(skb);
}
return 0;
nomem:
log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");
return 1;
}
static int t4_uld_state_change(void *handle, enum cxgb4_state state)
{
struct cxgbi_device *cdev = handle;
switch (state) {
case CXGB4_STATE_UP:
pr_info("cdev 0x%p, UP.\n", cdev);
break;
case CXGB4_STATE_START_RECOVERY:
pr_info("cdev 0x%p, RECOVERY.\n", cdev);
/* close all connections */
break;
case CXGB4_STATE_DOWN:
pr_info("cdev 0x%p, DOWN.\n", cdev);
break;
case CXGB4_STATE_DETACH:
pr_info("cdev 0x%p, DETACH.\n", cdev);
cxgbi_device_unregister(cdev);
break;
default:
pr_info("cdev 0x%p, unknown state %d.\n", cdev, state);
break;
}
return 0;
}
static int __init cxgb4i_init_module(void)
{
int rc;
printk(KERN_INFO "%s", version);
rc = cxgbi_iscsi_init(&cxgb4i_iscsi_transport, &cxgb4i_stt);
if (rc < 0)
return rc;
cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
return 0;
}
static void __exit cxgb4i_exit_module(void)
{
cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
}
module_init(cxgb4i_init_module);
module_exit(cxgb4i_exit_module);
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