cxgb4i.c 60.4 KB
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/*
 * cxgb4i.c: Chelsio T4 iSCSI driver.
 *
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 * Copyright (c) 2010-2015 Chelsio Communications, Inc.
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 *
 * 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__

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#include <linux/kernel.h>
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#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>
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#include <net/addrconf.h>
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#include "t4_regs.h"
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#include "t4_msg.h"
#include "cxgb4.h"
#include "cxgb4_uld.h"
#include "t4fw_api.h"
#include "l2t.h"
#include "cxgb4i.h"
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#include "clip_tbl.h"
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static unsigned int dbg_level;

#include "../libcxgbi.h"

#define	DRV_MODULE_NAME		"cxgb4i"
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#define DRV_MODULE_DESC		"Chelsio T4/T5 iSCSI Driver"
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#define	DRV_MODULE_VERSION	"0.9.5-ko"
#define DRV_MODULE_RELDATE	"Apr. 2015"
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static char version[] =
	DRV_MODULE_DESC " " DRV_MODULE_NAME
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	" v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
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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)");

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#define CXGB4I_DEFAULT_10G_RCV_WIN (256 * 1024)
static int cxgb4i_rcv_win = -1;
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module_param(cxgb4i_rcv_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_rcv_win, "TCP reveive window in bytes");

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#define CXGB4I_DEFAULT_10G_SND_WIN (128 * 1024)
static int cxgb4i_snd_win = -1;
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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);
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static inline int send_tx_flowc_wr(struct cxgbi_sock *);
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static const struct cxgb4_uld_info cxgb4i_uld_info = {
	.name = DRV_MODULE_NAME,
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	.nrxq = MAX_ULD_QSETS,
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	.ntxq = MAX_ULD_QSETS,
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	.rxq_size = 1024,
	.lro = false,
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	.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,
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	.change_queue_depth = scsi_change_queue_depth,
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	.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,
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	.track_queue_depth = 1,
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};

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 |
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				CAP_PADDING_OFFLOAD | CAP_TEXT_NEGO,
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	.attr_is_visible	= cxgbi_attr_is_visible,
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	.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,
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	.get_conn_param	= iscsi_conn_get_param,
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	.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 */
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	.get_ep_param	= cxgbi_get_ep_param,
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	.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.
 */
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#define RCV_BUFSIZ_MASK		0x3FFU
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#define MAX_IMM_TX_PKT_LEN	256
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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.
 */
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static inline bool is_ofld_imm(const struct sk_buff *skb)
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{
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	int len = skb->len;

	if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
		len += sizeof(struct fw_ofld_tx_data_wr);

	return len <= MAX_IMM_TX_PKT_LEN;
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}

static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
				struct l2t_entry *e)
{
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	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
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	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);

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	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) |
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		RCV_BUFSIZ_V(csk->rcv_win >> 10);
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	opt2 = RX_CHANNEL_V(0) |
		RSS_QUEUE_VALID_F |
		RSS_QUEUE_V(csk->rss_qid);
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	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,
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					qid_atid));
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		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);
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		req->params = cpu_to_be32(cxgb4_select_ntuple(
					csk->cdev->ports[csk->port_id],
					csk->l2t));
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		opt2 |= RX_FC_VALID_F;
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		req->opt2 = cpu_to_be32(opt2);
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		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);
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	} else if (is_t5(lldi->adapter_type)) {
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		struct cpl_t5_act_open_req *req =
				(struct cpl_t5_act_open_req *)skb->head;
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		u32 isn = (prandom_u32() & ~7UL) - 1;
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		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);
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		req->params = cpu_to_be64(FILTER_TUPLE_V(
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				cxgb4_select_ntuple(
					csk->cdev->ports[csk->port_id],
					csk->l2t)));
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		req->rsvd = cpu_to_be32(isn);
		opt2 |= T5_ISS_VALID;
		opt2 |= T5_OPT_2_VALID_F;

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		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);
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	} else {
		struct cpl_t6_act_open_req *req =
				(struct cpl_t6_act_open_req *)skb->head;
		u32 isn = (prandom_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);
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	}

	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
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	pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
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		       (&csk->saddr), (&csk->daddr),
		       CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
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		       csk->state, csk->flags, csk->atid, csk->rss_qid);

	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}

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#if IS_ENABLED(CONFIG_IPV6)
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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);

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	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) |
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		RCV_BUFSIZ_V(csk->rcv_win >> 10);
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	opt2 = RX_CHANNEL_V(0) |
		RSS_QUEUE_VALID_F |
		RSS_QUEUE_V(csk->rss_qid);
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	if (is_t4(lldi->adapter_type)) {
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		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);

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		opt2 |= RX_FC_VALID_F;
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		req->opt2 = cpu_to_be32(opt2);

		req->params = cpu_to_be32(cxgb4_select_ntuple(
					  csk->cdev->ports[csk->port_id],
					  csk->l2t));
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	} else if (is_t5(lldi->adapter_type)) {
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		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);

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		opt2 |= T5_OPT_2_VALID_F;
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		req->opt2 = cpu_to_be32(opt2);

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		req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
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					  csk->cdev->ports[csk->port_id],
					  csk->l2t)));
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	} 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);
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	}

	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",
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		CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
		csk->flags, csk->atid,
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		&csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
		&csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
		csk->rss_qid);

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	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
}
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#endif
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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;
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	if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
		send_tx_flowc_wr(csk);
		cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
	}

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	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;
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	set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498
	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;
499
	set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519
	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);

520
	skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
521 522 523 524 525 526 527 528 529 530
	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));
531 532
	req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
				       | RX_FORCE_ACK_F);
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
	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;
565
	if (skb_tail_pointer(skb) != skb_transport_header(skb))
566 567 568 569
		cnt++;
	return flits + sgl_len(cnt);
}

570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591
#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;
	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)
592 593 594
{
	struct sk_buff *skb;
	struct fw_flowc_wr *flowc;
595
	int nparams, flowclen16, flowclen;
596

597
	flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
598
	skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
599 600
	flowc = (struct fw_flowc_wr *)skb->head;
	flowc->op_to_nparams =
601
		htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
602
	flowc->flowid_len16 =
603
		htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
604
	flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
605
	flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
606 607 608 609 610 611 612 613 614 615 616
	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;
617
	flowc->mnemval[6].val = htonl(csk->snd_win);
618 619 620 621
	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;
622 623 624
	flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
	flowc->mnemval[8].val = 16384;

625
	set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
626 627 628 629

	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,
630
		csk->snd_nxt, csk->rcv_nxt, csk->snd_win,
631 632 633
		csk->advmss);

	cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
634 635

	return flowclen16;
636 637 638 639 640 641 642
}

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;
643
	unsigned int wr_ulp_mode = 0, val;
644
	bool imm = is_ofld_imm(skb);
645 646 647

	req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));

648
	if (imm) {
649 650 651 652 653
		req->op_to_immdlen = htonl(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
					FW_WR_COMPL_F |
					FW_WR_IMMDLEN_V(dlen));
		req->flowid_len16 = htonl(FW_WR_FLOWID_V(csk->tid) |
						FW_WR_LEN16_V(credits));
654 655
	} else {
		req->op_to_immdlen =
656 657 658
			cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
					FW_WR_COMPL_F |
					FW_WR_IMMDLEN_V(0));
659
		req->flowid_len16 =
660 661
			cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
					FW_WR_LEN16_V(credits));
662 663
	}
	if (submode)
664 665 666
		wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE_V(ULP2_MODE_ISCSI) |
				FW_OFLD_TX_DATA_WR_ULPSUBMODE_V(submode);
	val = skb_peek(&csk->write_queue) ? 0 : 1;
K
Karen Xie 已提交
667
	req->tunnel_to_proxy = htonl(wr_ulp_mode |
668
				     FW_OFLD_TX_DATA_WR_SHOVE_V(val));
669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696
	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;
697
		int flowclen16 = 0;
698 699 700

		skb_reset_transport_header(skb);
		if (is_ofld_imm(skb))
701
			credits_needed = DIV_ROUND_UP(dlen, 16);
702
		else
703 704 705 706 707 708 709
			credits_needed = DIV_ROUND_UP(
						8 * calc_tx_flits_ofld(skb),
						16);

		if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
			credits_needed += DIV_ROUND_UP(
					sizeof(struct fw_ofld_tx_data_wr),
710 711
					16);

712 713 714 715 716 717 718 719 720 721 722
		/*
		 * 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);
		}

723 724 725 726 727 728 729 730
		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);
731
		set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
732
		skb->csum = credits_needed + flowclen16;
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
		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))) {
			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);
748 749 750 751 752
		} 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 |= htonl(FW_WR_COMPL_F);
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
		}
		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);
783
	unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
784 785 786 787 788 789 790 791 792 793
	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;
	}

794 795 796 797 798 799
	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;
	}

800 801 802 803 804
	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);
805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827

	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.
	 */
828 829
	if (csk->rcv_win > (RCV_BUFSIZ_MASK << 10))
		csk->rcv_wup -= csk->rcv_win - (RCV_BUFSIZ_MASK << 10);
830

831 832
	csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
	if (TCPOPT_TSTAMP_G(tcp_opt))
833 834 835 836 837 838
		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",
839
			csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875

	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)
{
876
	struct sk_buff *skb = NULL;
877
	struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
878
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
879 880 881
	void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
				   struct l2t_entry *);
	int t4 = is_t4(lldi->adapter_type), size, size6;
882 883 884 885 886 887 888

	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);
889 890 891 892 893 894 895 896 897 898 899 900

	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);
901
#if IS_ENABLED(CONFIG_IPV6)
902 903 904
	} else {
		send_act_open_func = send_act_open_req6;
		skb = alloc_wr(size6, 0, GFP_ATOMIC);
905
#endif
906 907
	}

908 909 910 911 912
	if (!skb)
		cxgbi_sock_fail_act_open(csk, -ENOMEM);
	else {
		skb->sk = (struct sock *)csk;
		t4_set_arp_err_handler(skb, csk,
913 914
				       cxgbi_sock_act_open_req_arp_failure);
		send_act_open_func(csk, skb, csk->l2t);
915
	}
916

917 918
	spin_unlock_bh(&csk->lock);
	cxgbi_sock_put(csk);
919

920 921
}

922 923 924 925 926 927 928
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;
}

929 930 931 932 933 934
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 =
935 936
		TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
	unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
937 938 939 940 941 942 943 944 945
	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;
	}

946 947 948
	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);
949

950
	if (is_neg_adv(status))
951 952
		goto rel_skb;

953 954
	module_put(THIS_MODULE);

955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989
	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;
	}
990 991 992
	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
		       (&csk->saddr), (&csk->daddr),
		       csk, csk->state, csk->flags, csk->tid);
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
	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;
	}
1011 1012 1013
	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
		       (&csk->saddr), (&csk->daddr),
		       csk, csk->state, csk->flags, csk->tid);
1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
	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;
	}

1052 1053 1054
	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);
1055

1056
	if (is_neg_adv(req->status))
1057 1058 1059 1060 1061
		goto rel_skb;

	cxgbi_sock_get(csk);
	spin_lock_bh(&csk->lock);

A
Anish Bhatt 已提交
1062 1063 1064 1065 1066
	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);
1067 1068
	}

A
Anish Bhatt 已提交
1069 1070 1071
	cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
	cxgbi_sock_set_state(csk, CTP_ABORTING);

1072 1073 1074 1075 1076 1077
	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);
	}
A
Anish Bhatt 已提交
1078

1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096
	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;

1097 1098 1099 1100
	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);
1101 1102 1103 1104 1105 1106 1107 1108 1109

	if (rpl->status == CPL_ERR_ABORT_FAILED)
		goto rel_skb;

	cxgbi_sock_rcv_abort_rpl(csk);
rel_skb:
	__kfree_skb(skb);
}

K
Karen Xie 已提交
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
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);
}

1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
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);
1164 1165
	cxgbi_skcb_flags(skb) = 0;

1166 1167 1168 1169 1170 1171
	skb_reset_transport_header(skb);
	__skb_pull(skb, sizeof(*cpl));
	__pskb_trim(skb, ntohs(cpl->len));

	if (!csk->skb_ulp_lhdr) {
		unsigned char *bhs;
1172
		unsigned int hlen, dlen, plen;
1173 1174 1175 1176 1177

		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;
1178
		cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1179

1180
		if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1181
			pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1182
				csk->tid, cxgbi_skcb_tcp_seq(skb),
1183 1184 1185 1186
				csk->rcv_nxt);
			goto abort_conn;
		}

1187
		bhs = skb->data;
1188 1189 1190
		hlen = ntohs(cpl->len);
		dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;

1191
		plen = ISCSI_PDU_LEN_G(pdu_len_ddp);
1192 1193 1194 1195
		if (is_t4(lldi->adapter_type))
			plen -= 40;

		if ((hlen + dlen) != plen) {
1196 1197
			pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
				"mismatch %u != %u + %u, seq 0x%x.\n",
1198 1199
				csk->tid, plen, hlen, dlen,
				cxgbi_skcb_tcp_seq(skb));
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214
			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 {
1215
		struct sk_buff *lskb = csk->skb_ulp_lhdr;
1216

1217
		cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
		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);
}

1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329
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);
	}
}

1330 1331 1332 1333 1334 1335 1336 1337 1338
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;
1339
	u32 ddpvld = be32_to_cpu(rpl->ddpvld);
1340 1341 1342 1343 1344 1345 1346 1347 1348

	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",
1349
		csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376

	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));

1377 1378
	cxgb4i_process_ddpvld(csk, lskb, ddpvld);

1379 1380 1381 1382
	log_debug(1 << CXGBI_DBG_PDU_RX,
		"csk 0x%p, lskb 0x%p, f 0x%lx.\n",
		csk, lskb, cxgbi_skcb_flags(lskb));

1383
	cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
	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);
}

1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
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);
}

1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
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)
{
1534 1535
	csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
					0, GFP_KERNEL);
1536 1537 1538
	if (!csk->cpl_close)
		return -ENOMEM;

1539 1540
	csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
					0, GFP_KERNEL);
1541 1542 1543
	if (!csk->cpl_abort_req)
		goto free_cpls;

1544 1545
	csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
					0, GFP_KERNEL);
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566
	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;
1567 1568 1569
#if IS_ENABLED(CONFIG_IPV6)
	struct net_device *ndev = csk->cdev->ports[csk->port_id];
#endif
1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581

	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);
1582 1583 1584 1585 1586 1587
#if IS_ENABLED(CONFIG_IPV6)
	if (csk->csk_family == AF_INET6)
		cxgb4_clip_release(ndev,
				   (const u32 *)&csk->saddr6.sin6_addr, 1);
#endif

1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605
	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;
1606 1607
	struct neighbour *n = NULL;
	void *daddr;
1608
	unsigned int step;
1609
	unsigned int size, size6;
1610 1611
	unsigned int linkspeed;
	unsigned int rcv_winf, snd_winf;
1612 1613 1614 1615 1616

	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);

1617 1618
	if (csk->csk_family == AF_INET)
		daddr = &csk->daddr.sin_addr.s_addr;
1619 1620
#if IS_ENABLED(CONFIG_IPV6)
	else if (csk->csk_family == AF_INET6)
1621
		daddr = &csk->daddr6.sin6_addr;
1622 1623 1624 1625 1626
#endif
	else {
		pr_err("address family 0x%x not supported\n", csk->csk_family);
		goto rel_resource;
	}
1627 1628 1629 1630 1631 1632 1633 1634

	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;
	}

1635 1636 1637
	csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
	if (csk->atid < 0) {
		pr_err("%s, NO atid available.\n", ndev->name);
1638
		goto rel_resource_without_clip;
1639 1640 1641 1642
	}
	cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
	cxgbi_sock_get(csk);

1643
	csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1644 1645
	if (!csk->l2t) {
		pr_err("%s, cannot alloc l2t.\n", ndev->name);
1646
		goto rel_resource_without_clip;
1647 1648 1649
	}
	cxgbi_sock_get(csk);

1650 1651 1652 1653 1654
#if IS_ENABLED(CONFIG_IPV6)
	if (csk->csk_family == AF_INET6)
		cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
#endif

1655
	if (is_t4(lldi->adapter_type)) {
1656 1657
		size = sizeof(struct cpl_act_open_req);
		size6 = sizeof(struct cpl_act_open_req6);
1658
	} else if (is_t5(lldi->adapter_type)) {
1659 1660
		size = sizeof(struct cpl_t5_act_open_req);
		size6 = sizeof(struct cpl_t5_act_open_req6);
1661 1662 1663
	} else {
		size = sizeof(struct cpl_t6_act_open_req);
		size6 = sizeof(struct cpl_t6_act_open_req6);
1664 1665 1666 1667
	}

	if (csk->csk_family == AF_INET)
		skb = alloc_wr(size, 0, GFP_NOIO);
1668
#if IS_ENABLED(CONFIG_IPV6)
1669 1670
	else
		skb = alloc_wr(size6, 0, GFP_NOIO);
1671
#endif
1672

1673 1674 1675 1676 1677 1678 1679 1680 1681
	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);
1682 1683
	csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type,
					 cxgb4_port_viid(ndev));
1684 1685 1686 1687
	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];
1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702
	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;
	}
1703 1704 1705
	csk->wr_cred = lldi->wr_cred -
		       DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
	csk->wr_max_cred = csk->wr_cred;
1706 1707 1708 1709
	csk->wr_una_cred = 0;
	cxgbi_sock_reset_wr_list(csk);
	csk->err = 0;

1710 1711 1712 1713 1714 1715 1716
	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);
1717
	cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1718 1719
	if (csk->csk_family == AF_INET)
		send_act_open_req(csk, skb, csk->l2t);
1720
#if IS_ENABLED(CONFIG_IPV6)
1721 1722
	else
		send_act_open_req6(csk, skb, csk->l2t);
1723
#endif
1724
	neigh_release(n);
1725

1726 1727 1728
	return 0;

rel_resource:
1729 1730 1731 1732 1733 1734
#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:
1735 1736
	if (n)
		neigh_release(n);
1737 1738 1739 1740 1741
	if (skb)
		__kfree_skb(skb);
	return -EINVAL;
}

1742
static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
1743 1744 1745 1746 1747 1748 1749 1750
	[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,
1751
	[CPL_ISCSI_DATA] = do_rx_iscsi_data,
1752 1753
	[CPL_SET_TCB_RPL] = do_set_tcb_rpl,
	[CPL_RX_DATA_DDP] = do_rx_data_ddp,
1754
	[CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
1755
	[CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
K
Karen Xie 已提交
1756
	[CPL_RX_DATA] = do_rx_data,
1757 1758
};

1759
static int cxgb4i_ofld_init(struct cxgbi_device *cdev)
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782
{
	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;
}

1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891
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;
}

1892 1893 1894 1895 1896 1897
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;

1898
	if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1899 1900
		return 0;

1901
	skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1902 1903 1904
	if (!skb)
		return -ENOMEM;

1905
	/*  set up ulp page size */
1906 1907 1908
	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));
1909
	req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1910 1911 1912
	req->word_cookie = htons(0);
	req->mask = cpu_to_be64(0x3 << 8);
	req->val = cpu_to_be64(pg_idx << 8);
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927
	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;

1928 1929
	if (!hcrc && !dcrc)
		return 0;
1930

1931
	skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1932 1933 1934 1935 1936
	if (!skb)
		return -ENOMEM;

	csk->hcrc_len = (hcrc ? 4 : 0);
	csk->dcrc_len = (dcrc ? 4 : 0);
1937
	/*  set up ulp submode */
1938 1939 1940
	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));
1941
	req->reply_ctrl = htons(NO_REPLY_V(reply) | QUEUENO_V(csk->rss_qid));
1942 1943 1944 1945
	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);
1946 1947 1948 1949 1950 1951 1952 1953 1954
	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;
}

1955 1956 1957 1958 1959 1960
static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev)
{
	return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *)
				       (cxgbi_cdev_priv(cdev)))->iscsi_ppm);
}

1961 1962
static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
{
1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
	struct net_device *ndev = cdev->ports[0];
	struct cxgbi_tag_format tformat;
	unsigned int ppmax;
	int i;

	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;
	ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT;

	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);

	cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax,
			    lldi->iscsi_llimit, lldi->vr->iscsi.start, 2);

1986 1987
	cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
	cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
1988 1989 1990 1991 1992 1993 1994
	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;

1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
	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;
2025 2026
	cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
				 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
2027 2028 2029 2030
	cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
	cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
	cdev->itp = &cxgb4i_iscsi_transport;

2031 2032
	cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
			<< FW_VIID_PFN_S;
2033 2034 2035
	pr_info("cdev 0x%p,%s, pfvf %u.\n",
		cdev, lldi->ports[0]->name, cdev->pfvf);

2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
	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;

2075
		skb = alloc_wr(len, 0, GFP_ATOMIC);
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125
		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);
2126
		cxgbi_device_unregister(cdev);
2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144
		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);
2145

2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157
	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);