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linuxdebug/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

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/*
* cxgb4i.c: Chelsio 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)
* Rakesh Ranjan (rranjan@chelsio.com)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/kernel.h>
#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"
#include "clip_tbl.h"
static unsigned int dbg_level;
#include "../libcxgbi.h"
#ifdef CONFIG_CHELSIO_T4_DCB
#include <net/dcbevent.h>
#include "cxgb4_dcb.h"
#endif
#define DRV_MODULE_NAME "cxgb4i"
#define DRV_MODULE_DESC "Chelsio T4-T6 iSCSI Driver"
#define DRV_MODULE_VERSION "0.9.5-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, "Debug flag (default=0)");
#define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
static int cxgb4i_rcv_win = -1;
module_param(cxgb4i_rcv_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP receive window in bytes");
#define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
static int cxgb4i_snd_win = -1;
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 inline int send_tx_flowc_wr(struct cxgbi_sock *);
static const struct cxgb4_uld_info cxgb4i_uld_info = {
.name = DRV_MODULE_NAME,
.nrxq = MAX_ULD_QSETS,
.ntxq = MAX_ULD_QSETS,
.rxq_size = 1024,
.lro = false,
.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 = scsi_change_queue_depth,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
.eh_timed_out = iscsi_eh_cmd_timed_out,
.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,
.dma_boundary = PAGE_SIZE - 1,
.this_id = -1,
.track_queue_depth = 1,
.cmd_size = sizeof(struct iscsi_cmd),
};
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,
.unbind_conn = iscsi_conn_unbind,
.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,
};
#ifdef CONFIG_CHELSIO_T4_DCB
static int
cxgb4_dcb_change_notify(struct notifier_block *, unsigned long, void *);
static struct notifier_block cxgb4_dcb_change = {
.notifier_call = cxgb4_dcb_change_notify,
};
#endif
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 RCV_BUFSIZ_MASK 0x3FFU
#define MAX_IMM_TX_PKT_LEN 256
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 bool is_ofld_imm(const struct sk_buff *skb)
{
int len = skb->len;
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
len += sizeof(struct fw_ofld_tx_data_wr);
if (likely(cxgbi_skcb_test_flag((struct sk_buff *)skb, SKCBF_TX_ISO)))
len += sizeof(struct cpl_tx_data_iso);
return (len <= MAX_IMM_OFLD_TX_DATA_WR_LEN);
}
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 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_F |
WND_SCALE_V(wscale) |
MSS_IDX_V(csk->mss_idx) |
L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
TX_CHAN_V(csk->tx_chan) |
SMAC_SEL_V(csk->smac_idx) |
ULP_MODE_V(ULP_MODE_ISCSI) |
RCV_BUFSIZ_V(csk->rcv_win >> 10);
opt2 = RX_CHANNEL_V(0) |
RSS_QUEUE_VALID_F |
RSS_QUEUE_V(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 |= RX_FC_VALID_F;
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 if (is_t5(lldi->adapter_type)) {
struct cpl_t5_act_open_req *req =
(struct cpl_t5_act_open_req *)skb->head;
u32 isn = (get_random_u32() & ~7UL) - 1;
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(FILTER_TUPLE_V(
cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t)));
req->rsvd = cpu_to_be32(isn);
opt2 |= T5_ISS_VALID;
opt2 |= T5_OPT_2_VALID_F;
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);
} else {
struct cpl_t6_act_open_req *req =
(struct cpl_t6_act_open_req *)skb->head;
u32 isn = (get_random_u32() & ~7UL) - 1;
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(FILTER_TUPLE_V(
cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t)));
req->rsvd = cpu_to_be32(isn);
opt2 |= T5_ISS_VALID;
opt2 |= RX_FC_DISABLE_F;
opt2 |= T5_OPT_2_VALID_F;
req->opt2 = cpu_to_be32(opt2);
req->rsvd2 = cpu_to_be32(0);
req->opt3 = cpu_to_be32(0);
log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
"csk t6 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),
CHELSIO_CHIP_VERSION(lldi->adapter_type), 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 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_F |
WND_SCALE_V(wscale) |
MSS_IDX_V(csk->mss_idx) |
L2T_IDX_V(((struct l2t_entry *)csk->l2t)->idx) |
TX_CHAN_V(csk->tx_chan) |
SMAC_SEL_V(csk->smac_idx) |
ULP_MODE_V(ULP_MODE_ISCSI) |
RCV_BUFSIZ_V(csk->rcv_win >> 10);
opt2 = RX_CHANNEL_V(0) |
RSS_QUEUE_VALID_F |
RSS_QUEUE_V(csk->rss_qid);
if (is_t4(lldi->adapter_type)) {
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_F;
req->opt2 = cpu_to_be32(opt2);
req->params = cpu_to_be32(cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t));
} else if (is_t5(lldi->adapter_type)) {
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_F;
req->opt2 = cpu_to_be32(opt2);
req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t)));
} else {
struct cpl_t6_act_open_req6 *req =
(struct cpl_t6_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_DISABLE_F;
opt2 |= T5_OPT_2_VALID_F;
req->opt2 = cpu_to_be32(opt2);
req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
csk->cdev->ports[csk->port_id],
csk->l2t)));
req->rsvd2 = cpu_to_be32(0);
req->opt3 = cpu_to_be32(0);
}
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",
CHELSIO_CHIP_VERSION(lldi->adapter_type), 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;
if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
send_tx_flowc_wr(csk);
cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
}
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_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
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_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
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_V(credits)
| RX_FORCE_ACK_F);
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);
}
#define FLOWC_WR_NPARAMS_MIN 9
static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp)
{
int nparams, flowclen16, flowclen;
nparams = FLOWC_WR_NPARAMS_MIN;
#ifdef CONFIG_CHELSIO_T4_DCB
nparams++;
#endif
flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]);
flowclen16 = DIV_ROUND_UP(flowclen, 16);
flowclen = flowclen16 * 16;
/*
* Return the number of 16-byte credits used by the FlowC request.
* Pass back the nparams and actual FlowC length if requested.
*/
if (nparamsp)
*nparamsp = nparams;
if (flowclenp)
*flowclenp = flowclen;
return flowclen16;
}
static inline int send_tx_flowc_wr(struct cxgbi_sock *csk)
{
struct sk_buff *skb;
struct fw_flowc_wr *flowc;
int nparams, flowclen16, flowclen;
#ifdef CONFIG_CHELSIO_T4_DCB
u16 vlan = ((struct l2t_entry *)csk->l2t)->vlan;
#endif
flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
flowc = (struct fw_flowc_wr *)skb->head;
flowc->op_to_nparams =
htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
flowc->flowid_len16 =
htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(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(csk->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;
flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
if (csk->cdev->skb_iso_txhdr)
flowc->mnemval[8].val = cpu_to_be32(CXGBI_MAX_ISO_DATA_IN_SKB);
else
flowc->mnemval[8].val = cpu_to_be32(16128);
#ifdef CONFIG_CHELSIO_T4_DCB
flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_DCBPRIO;
if (vlan == CPL_L2T_VLAN_NONE) {
pr_warn_ratelimited("csk %u without VLAN Tag on DCB Link\n",
csk->tid);
flowc->mnemval[9].val = cpu_to_be32(0);
} else {
flowc->mnemval[9].val = cpu_to_be32((vlan & VLAN_PRIO_MASK) >>
VLAN_PRIO_SHIFT);
}
#endif
set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
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, csk->snd_win,
csk->advmss);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
return flowclen16;
}
static void
cxgb4i_make_tx_iso_cpl(struct sk_buff *skb, struct cpl_tx_data_iso *cpl)
{
struct cxgbi_iso_info *info = (struct cxgbi_iso_info *)skb->head;
u32 imm_en = !!(info->flags & CXGBI_ISO_INFO_IMM_ENABLE);
u32 fslice = !!(info->flags & CXGBI_ISO_INFO_FSLICE);
u32 lslice = !!(info->flags & CXGBI_ISO_INFO_LSLICE);
u32 pdu_type = (info->op == ISCSI_OP_SCSI_CMD) ? 0 : 1;
u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
cpl->op_to_scsi = cpu_to_be32(CPL_TX_DATA_ISO_OP_V(CPL_TX_DATA_ISO) |
CPL_TX_DATA_ISO_FIRST_V(fslice) |
CPL_TX_DATA_ISO_LAST_V(lslice) |
CPL_TX_DATA_ISO_CPLHDRLEN_V(0) |
CPL_TX_DATA_ISO_HDRCRC_V(submode & 1) |
CPL_TX_DATA_ISO_PLDCRC_V(((submode >> 1) & 1)) |
CPL_TX_DATA_ISO_IMMEDIATE_V(imm_en) |
CPL_TX_DATA_ISO_SCSI_V(pdu_type));
cpl->ahs_len = info->ahs;
cpl->mpdu = cpu_to_be16(DIV_ROUND_UP(info->mpdu, 4));
cpl->burst_size = cpu_to_be32(info->burst_size);
cpl->len = cpu_to_be32(info->len);
cpl->reserved2_seglen_offset =
cpu_to_be32(CPL_TX_DATA_ISO_SEGLEN_OFFSET_V(info->segment_offset));
cpl->datasn_offset = cpu_to_be32(info->datasn_offset);
cpl->buffer_offset = cpu_to_be32(info->buffer_offset);
cpl->reserved3 = cpu_to_be32(0);
log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
"iso: flags 0x%x, op %u, ahs %u, num_pdu %u, mpdu %u, "
"burst_size %u, iso_len %u\n",
info->flags, info->op, info->ahs, info->num_pdu,
info->mpdu, info->burst_size << 2, info->len);
}
static void
cxgb4i_make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, int dlen,
int len, u32 credits, int compl)
{
struct cxgbi_device *cdev = csk->cdev;
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct fw_ofld_tx_data_wr *req;
struct cpl_tx_data_iso *cpl;
u32 submode = cxgbi_skcb_tx_ulp_mode(skb) & 0x3;
u32 wr_ulp_mode = 0;
u32 hdr_size = sizeof(*req);
u32 opcode = FW_OFLD_TX_DATA_WR;
u32 immlen = 0;
u32 force = is_t5(lldi->adapter_type) ? TX_FORCE_V(!submode) :
T6_TX_FORCE_F;
if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
hdr_size += sizeof(struct cpl_tx_data_iso);
opcode = FW_ISCSI_TX_DATA_WR;
immlen += sizeof(struct cpl_tx_data_iso);
submode |= 8;
}
if (is_ofld_imm(skb))
immlen += dlen;
req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, hdr_size);
req->op_to_immdlen = cpu_to_be32(FW_WR_OP_V(opcode) |
FW_WR_COMPL_V(compl) |
FW_WR_IMMDLEN_V(immlen));
req->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
FW_WR_LEN16_V(credits));
req->plen = cpu_to_be32(len);
cpl = (struct cpl_tx_data_iso *)(req + 1);
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)))
cxgb4i_make_tx_iso_cpl(skb, cpl);
if (submode)
wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
req->tunnel_to_proxy = cpu_to_be32(wr_ulp_mode | force |
FW_OFLD_TX_DATA_WR_SHOVE_V(1U));
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)) {
struct cxgbi_iso_info *iso_cpl;
u32 dlen = skb->len;
u32 len = skb->len;
u32 iso_cpl_len = 0;
u32 flowclen16 = 0;
u32 credits_needed;
u32 num_pdu = 1, hdr_len;
if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO))
iso_cpl_len = sizeof(struct cpl_tx_data_iso);
if (is_ofld_imm(skb))
credits_needed = DIV_ROUND_UP(dlen + iso_cpl_len, 16);
else
credits_needed =
DIV_ROUND_UP((8 * calc_tx_flits_ofld(skb)) +
iso_cpl_len, 16);
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
credits_needed +=
DIV_ROUND_UP(sizeof(struct fw_ofld_tx_data_wr), 16);
/*
* Assumes the initial credits is large enough to support
* fw_flowc_wr plus largest possible first payload
*/
if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
flowclen16 = send_tx_flowc_wr(csk);
csk->wr_cred -= flowclen16;
csk->wr_una_cred += flowclen16;
cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
}
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);
csk->no_tx_credits++;
break;
}
csk->no_tx_credits = 0;
__skb_unlink(skb, &csk->write_queue);
set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
skb->csum = (__force __wsum)(credits_needed + flowclen16);
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 (!req_completion &&
((csk->wr_una_cred >= (csk->wr_max_cred / 2)) ||
after(csk->write_seq, (csk->snd_una + csk->snd_win / 2))))
req_completion = 1;
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
u32 ulp_mode = cxgbi_skcb_tx_ulp_mode(skb);
if (cxgbi_skcb_test_flag(skb, SKCBF_TX_ISO)) {
iso_cpl = (struct cxgbi_iso_info *)skb->head;
num_pdu = iso_cpl->num_pdu;
hdr_len = cxgbi_skcb_tx_iscsi_hdrlen(skb);
len += (cxgbi_ulp_extra_len(ulp_mode) * num_pdu) +
(hdr_len * (num_pdu - 1));
} else {
len += cxgbi_ulp_extra_len(ulp_mode);
}
cxgb4i_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);
} else if (cxgbi_skcb_test_flag(skb, SKCBF_TX_FLAG_COMPL) &&
(csk->wr_una_cred >= (csk->wr_max_cred / 2))) {
struct cpl_close_con_req *req =
(struct cpl_close_con_req *)skb->data;
req->wr.wr_hi |= cpu_to_be32(FW_WR_COMPL_F);
}
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 = TID_TID_G(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(cdev->owner);
cxgbi_sock_get(csk);
csk->tid = tid;
cxgb4_insert_tid(lldi->tids, csk, tid, csk->csk_family);
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 (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
if (TCPOPT_TSTAMP_G(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, TCPOPT_MSS_G(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(struct timer_list *t)
{
struct sk_buff *skb = NULL;
struct cxgbi_sock *csk = from_timer(csk, t, retry_timer);
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 inline bool is_neg_adv(unsigned int status)
{
return status == CPL_ERR_RTX_NEG_ADVICE ||
status == CPL_ERR_KEEPALV_NEG_ADVICE ||
status == CPL_ERR_PERSIST_NEG_ADVICE;
}
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 =
TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
unsigned int status = AOPEN_STATUS_G(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 (is_neg_adv(status))
goto rel_skb;
module_put(cdev->owner);
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),
csk->csk_family);
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:
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 (is_neg_adv(req->status))
goto rel_skb;
cxgbi_sock_get(csk);
spin_lock_bh(&csk->lock);
cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
send_tx_flowc_wr(csk);
cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
}
cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
cxgbi_sock_set_state(csk, CTP_ABORTING);
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);
}
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;
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_data(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_rx_data *cpl = (struct cpl_rx_data *)skb->data;
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 (!csk) {
pr_err("can't find connection for tid %u.\n", tid);
} else {
/* not expecting this, reset the connection. */
pr_err("csk 0x%p, tid %u, rcv cpl_rx_data.\n", csk, tid);
spin_lock_bh(&csk->lock);
send_abort_req(csk);
spin_unlock_bh(&csk->lock);
}
__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 ((CHELSIO_CHIP_VERSION(lldi->adapter_type) <= CHELSIO_T5) &&
(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_G(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_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
struct sk_buff *lskb;
u32 tid = GET_TID(cpl);
u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
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) = be32_to_cpu(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)
csk->skb_ulp_lhdr = skb;
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
cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
struct sk_buff *skb, u32 ddpvld)
{
if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
csk, skb, ddpvld, cxgbi_skcb_flags(skb));
cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
}
if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
csk, skb, ddpvld, cxgbi_skcb_flags(skb));
cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
}
if (ddpvld & (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, skb, ddpvld);
cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
}
if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
!cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
log_debug(1 << CXGBI_DBG_PDU_RX,
"csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
csk, skb, ddpvld);
cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
}
}
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;
u32 ddpvld = be32_to_cpu(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, ddpvld, 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));
cxgb4i_process_ddpvld(csk, lskb, ddpvld);
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_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
{
struct cxgbi_sock *csk;
struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct tid_info *t = lldi->tids;
struct sk_buff *data_skb = NULL;
u32 tid = GET_TID(rpl);
u32 ddpvld = be32_to_cpu(rpl->ddpvld);
u32 seq = be32_to_cpu(rpl->seq);
u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
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, len %u, "
"pdu_len_ddp %u, status %u.\n",
csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
ntohs(rpl->len), pdu_len_ddp, rpl->status);
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) = seq;
cxgbi_skcb_flags(skb) = 0;
cxgbi_skcb_rx_pdulen(skb) = 0;
skb_reset_transport_header(skb);
__skb_pull(skb, sizeof(*rpl));
__pskb_trim(skb, be16_to_cpu(rpl->len));
csk->rcv_nxt = seq + pdu_len_ddp;
if (csk->skb_ulp_lhdr) {
data_skb = skb_peek(&csk->receive_queue);
if (!data_skb ||
!cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
pr_err("Error! freelist data not found 0x%p, tid %u\n",
data_skb, tid);
goto abort_conn;
}
__skb_unlink(data_skb, &csk->receive_queue);
cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
__skb_queue_tail(&csk->receive_queue, skb);
__skb_queue_tail(&csk->receive_queue, data_skb);
} else {
__skb_queue_tail(&csk->receive_queue, skb);
}
csk->skb_ulp_lhdr = NULL;
cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
cxgb4i_process_ddpvld(csk, skb, ddpvld);
log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
csk, skb, cxgbi_skcb_flags(skb));
cxgbi_conn_pdu_ready(csk);
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_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);
return;
}
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);
csk->err = -EINVAL;
}
complete(&csk->cmpl);
__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;
#if IS_ENABLED(CONFIG_IPV6)
struct net_device *ndev = csk->cdev->ports[csk->port_id];
#endif
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);
cxgbi_sock_purge_write_queue(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 IS_ENABLED(CONFIG_IPV6)
if (csk->csk_family == AF_INET6)
cxgb4_clip_release(ndev,
(const u32 *)&csk->saddr6.sin6_addr, 1);
#endif
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,
csk->csk_family);
cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
cxgbi_sock_put(csk);
}
csk->dst = NULL;
}
#ifdef CONFIG_CHELSIO_T4_DCB
static inline u8 get_iscsi_dcb_state(struct net_device *ndev)
{
return ndev->dcbnl_ops->getstate(ndev);
}
static int select_priority(int pri_mask)
{
if (!pri_mask)
return 0;
return (ffs(pri_mask) - 1);
}
static u8 get_iscsi_dcb_priority(struct net_device *ndev)
{
int rv;
u8 caps;
struct dcb_app iscsi_dcb_app = {
.protocol = 3260
};
rv = (int)ndev->dcbnl_ops->getcap(ndev, DCB_CAP_ATTR_DCBX, &caps);
if (rv)
return 0;
if (caps & DCB_CAP_DCBX_VER_IEEE) {
iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_STREAM;
rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
if (!rv) {
iscsi_dcb_app.selector = IEEE_8021QAZ_APP_SEL_ANY;
rv = dcb_ieee_getapp_mask(ndev, &iscsi_dcb_app);
}
} else if (caps & DCB_CAP_DCBX_VER_CEE) {
iscsi_dcb_app.selector = DCB_APP_IDTYPE_PORTNUM;
rv = dcb_getapp(ndev, &iscsi_dcb_app);
}
log_debug(1 << CXGBI_DBG_ISCSI,
"iSCSI priority is set to %u\n", select_priority(rv));
return select_priority(rv);
}
#endif
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 rxq_idx;
unsigned int size, size6;
unsigned int linkspeed;
unsigned int rcv_winf, snd_winf;
#ifdef CONFIG_CHELSIO_T4_DCB
u8 priority = 0;
#endif
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;
}
if (!(n->nud_state & NUD_VALID))
neigh_event_send(n, NULL);
csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
if (csk->atid < 0) {
pr_err("%s, NO atid available.\n", ndev->name);
goto rel_resource_without_clip;
}
cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
cxgbi_sock_get(csk);
#ifdef CONFIG_CHELSIO_T4_DCB
if (get_iscsi_dcb_state(ndev))
priority = get_iscsi_dcb_priority(ndev);
csk->dcb_priority = priority;
csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, priority);
#else
csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
#endif
if (!csk->l2t) {
pr_err("%s, cannot alloc l2t.\n", ndev->name);
goto rel_resource_without_clip;
}
cxgbi_sock_get(csk);
#if IS_ENABLED(CONFIG_IPV6)
if (csk->csk_family == AF_INET6)
cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
#endif
if (is_t4(lldi->adapter_type)) {
size = sizeof(struct cpl_act_open_req);
size6 = sizeof(struct cpl_act_open_req6);
} else if (is_t5(lldi->adapter_type)) {
size = sizeof(struct cpl_t5_act_open_req);
size6 = sizeof(struct cpl_t5_act_open_req6);
} else {
size = sizeof(struct cpl_t6_act_open_req);
size6 = sizeof(struct cpl_t6_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);
csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
step = lldi->ntxq / lldi->nchan;
csk->txq_idx = cxgb4_port_idx(ndev) * step;
step = lldi->nrxq / lldi->nchan;
rxq_idx = (cxgb4_port_idx(ndev) * step) + (cdev->rxq_idx_cntr % step);
cdev->rxq_idx_cntr++;
csk->rss_qid = lldi->rxq_ids[rxq_idx];
linkspeed = ((struct port_info *)netdev_priv(ndev))->link_cfg.speed;
csk->snd_win = cxgb4i_snd_win;
csk->rcv_win = cxgb4i_rcv_win;
if (cxgb4i_rcv_win <= 0) {
csk->rcv_win = CXGB4I_DEFAULT_10G_RCV_WIN;
rcv_winf = linkspeed / SPEED_10000;
if (rcv_winf)
csk->rcv_win *= rcv_winf;
}
if (cxgb4i_snd_win <= 0) {
csk->snd_win = CXGB4I_DEFAULT_10G_SND_WIN;
snd_winf = linkspeed / SPEED_10000;
if (snd_winf)
csk->snd_win *= snd_winf;
}
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 */
if (!try_module_get(cdev->owner)) {
pr_err("%s, try_module_get failed.\n", ndev->name);
goto rel_resource;
}
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 IS_ENABLED(CONFIG_IPV6)
if (csk->csk_family == AF_INET6)
cxgb4_clip_release(ndev,
(const u32 *)&csk->saddr6.sin6_addr, 1);
#endif
rel_resource_without_clip:
if (n)
neigh_release(n);
if (skb)
__kfree_skb(skb);
return -EINVAL;
}
static 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_data,
[CPL_SET_TCB_RPL] = do_set_tcb_rpl,
[CPL_RX_DATA_DDP] = do_rx_data_ddp,
[CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
[CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
[CPL_RX_DATA] = do_rx_data,
};
static 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;
}
static inline void
ulp_mem_io_set_hdr(struct cxgbi_device *cdev,
struct ulp_mem_io *req,
unsigned int wr_len, unsigned int dlen,
unsigned int pm_addr,
int tid)
{
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
INIT_ULPTX_WR(req, wr_len, 0, tid);
req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) |
FW_WR_ATOMIC_V(0));
req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) |
T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type)));
req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
idata->len = htonl(dlen);
}
static struct sk_buff *
ddp_ppod_init_idata(struct cxgbi_device *cdev,
struct cxgbi_ppm *ppm,
unsigned int idx, unsigned int npods,
unsigned int tid)
{
unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit;
unsigned int dlen = npods << PPOD_SIZE_SHIFT;
unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
sizeof(struct ulptx_idata) + dlen, 16);
struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
if (!skb) {
pr_err("%s: %s idx %u, npods %u, OOM.\n",
__func__, ppm->ndev->name, idx, npods);
return NULL;
}
ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen,
pm_addr, tid);
return skb;
}
static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
struct cxgbi_task_tag_info *ttinfo,
unsigned int idx, unsigned int npods,
struct scatterlist **sg_pp,
unsigned int *sg_off)
{
struct cxgbi_device *cdev = csk->cdev;
struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods,
csk->tid);
struct ulp_mem_io *req;
struct ulptx_idata *idata;
struct cxgbi_pagepod *ppod;
int i;
if (!skb)
return -ENOMEM;
req = (struct ulp_mem_io *)skb->head;
idata = (struct ulptx_idata *)(req + 1);
ppod = (struct cxgbi_pagepod *)(idata + 1);
for (i = 0; i < npods; i++, ppod++)
cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off);
cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE);
cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL);
set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
spin_lock_bh(&csk->lock);
cxgbi_sock_skb_entail(csk, skb);
spin_unlock_bh(&csk->lock);
return 0;
}
static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk,
struct cxgbi_task_tag_info *ttinfo)
{
unsigned int pidx = ttinfo->idx;
unsigned int npods = ttinfo->npods;
unsigned int i, cnt;
int err = 0;
struct scatterlist *sg = ttinfo->sgl;
unsigned int offset = 0;
ttinfo->cid = csk->port_id;
for (i = 0; i < npods; i += cnt, pidx += cnt) {
cnt = npods - i;
if (cnt > ULPMEM_IDATA_MAX_NPPODS)
cnt = ULPMEM_IDATA_MAX_NPPODS;
err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt,
&sg, &offset);
if (err < 0)
break;
}
return err;
}
static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
int pg_idx)
{
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_V(0) | QUEUENO_V(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);
reinit_completion(&csk->cmpl);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
wait_for_completion(&csk->cmpl);
return csk->err;
}
static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid,
int hcrc, int dcrc)
{
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_V(0) | QUEUENO_V(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);
reinit_completion(&csk->cmpl);
cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
wait_for_completion(&csk->cmpl);
return csk->err;
}
static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
{
return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
(cxgbi_cdev_priv(cdev)))->iscsi_ppm);
}
static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
{
struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
struct net_device *ndev = cdev->ports[0];
struct cxgbi_tag_format tformat;
int i, err;
if (!lldi->vr->iscsi.size) {
pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name);
return -EACCES;
}
cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ;
memset(&tformat, 0, sizeof(struct cxgbi_tag_format));
for (i = 0; i < 4; i++)
tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3))
& 0xF;
cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat);
pr_info("iscsi_edram.start 0x%x iscsi_edram.size 0x%x",
lldi->vr->ppod_edram.start, lldi->vr->ppod_edram.size);
err = cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat,
lldi->vr->iscsi.size, lldi->iscsi_llimit,
lldi->vr->iscsi.start, 2,
lldi->vr->ppod_edram.start,
lldi->vr->ppod_edram.size);
if (err < 0)
return err;
cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
cdev->csk_ddp_set_map = ddp_set_map;
cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN);
cdev->cdev2ppm = cdev2ppm;
return 0;
}
static bool is_memfree(struct adapter *adap)
{
u32 io;
io = t4_read_reg(adap, MA_TARGET_MEM_ENABLE_A);
if (is_t5(adap->params.chip)) {
if ((io & EXT_MEM0_ENABLE_F) || (io & EXT_MEM1_ENABLE_F))
return false;
} else if (io & EXT_MEM_ENABLE_F) {
return false;
}
return true;
}
static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
{
struct cxgbi_device *cdev;
struct port_info *pi;
struct net_device *ndev;
struct adapter *adap;
struct tid_info *t;
u32 max_cmds = CXGB4I_SCSI_HOST_QDEPTH;
u32 max_conn = CXGBI_MAX_CONN;
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->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
cdev->itp = &cxgb4i_iscsi_transport;
cdev->owner = THIS_MODULE;
cdev->pfvf = FW_PFVF_CMD_PFN_V(lldi->pf);
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 %d.\n", cdev, rc);
goto err_out;
}
ndev = cdev->ports[0];
adap = netdev2adap(ndev);
if (adap) {
t = &adap->tids;
if (t->ntids <= CXGBI_MAX_CONN)
max_conn = t->ntids;
if (is_memfree(adap)) {
cdev->flags |= CXGBI_FLAG_DEV_ISO_OFF;
max_cmds = CXGB4I_SCSI_HOST_QDEPTH >> 2;
pr_info("%s: 0x%p, tid %u, SO adapter.\n",
ndev->name, cdev, t->ntids);
}
} else {
pr_info("%s, 0x%p, NO adapter struct.\n", ndev->name, cdev);
}
/* ISO is enabled in T5/T6 firmware version >= 1.13.43.0 */
if (!is_t4(lldi->adapter_type) &&
(lldi->fw_vers >= 0x10d2b00) &&
!(cdev->flags & CXGBI_FLAG_DEV_ISO_OFF))
cdev->skb_iso_txhdr = sizeof(struct cpl_tx_data_iso);
rc = cxgb4i_ofld_init(cdev);
if (rc) {
pr_info("t4 0x%p ofld init failed.\n", cdev);
goto err_out;
}
cxgb4i_host_template.can_queue = max_cmds;
rc = cxgbi_hbas_add(cdev, CXGB4I_MAX_LUN, 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 (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {
pr_err("No handler for opcode 0x%x.\n", opc);
__kfree_skb(skb);
} else
cxgb4i_cplhandlers[opc](cdev, 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;
}
#ifdef CONFIG_CHELSIO_T4_DCB
static int
cxgb4_dcb_change_notify(struct notifier_block *self, unsigned long val,
void *data)
{
int i, port = 0xFF;
struct net_device *ndev;
struct cxgbi_device *cdev = NULL;
struct dcb_app_type *iscsi_app = data;
struct cxgbi_ports_map *pmap;
u8 priority;
if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) {
if ((iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_STREAM) &&
(iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY))
return NOTIFY_DONE;
priority = iscsi_app->app.priority;
} else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) {
if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM)
return NOTIFY_DONE;
if (!iscsi_app->app.priority)
return NOTIFY_DONE;
priority = ffs(iscsi_app->app.priority) - 1;
} else {
return NOTIFY_DONE;
}
if (iscsi_app->app.protocol != 3260)
return NOTIFY_DONE;
log_debug(1 << CXGBI_DBG_ISCSI, "iSCSI priority for ifid %d is %u\n",
iscsi_app->ifindex, priority);
ndev = dev_get_by_index(&init_net, iscsi_app->ifindex);
if (!ndev)
return NOTIFY_DONE;
cdev = cxgbi_device_find_by_netdev_rcu(ndev, &port);
dev_put(ndev);
if (!cdev)
return NOTIFY_DONE;
pmap = &cdev->pmap;
for (i = 0; i < pmap->used; i++) {
if (pmap->port_csk[i]) {
struct cxgbi_sock *csk = pmap->port_csk[i];
if (csk->dcb_priority != priority) {
iscsi_conn_failure(csk->user_data,
ISCSI_ERR_CONN_FAILED);
pr_info("Restarting iSCSI connection %p with "
"priority %u->%u.\n", csk,
csk->dcb_priority, priority);
}
}
}
return NOTIFY_OK;
}
#endif
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);
#ifdef CONFIG_CHELSIO_T4_DCB
pr_info("%s dcb enabled.\n", DRV_MODULE_NAME);
register_dcbevent_notifier(&cxgb4_dcb_change);
#endif
return 0;
}
static void __exit cxgb4i_exit_module(void)
{
#ifdef CONFIG_CHELSIO_T4_DCB
unregister_dcbevent_notifier(&cxgb4_dcb_change);
#endif
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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