cxgb4i.c 52.6 KB
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/*
 * cxgb4i.c: Chelsio T4 iSCSI driver.
 *
 * Copyright (c) 2010 Chelsio Communications, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Written by:	Karen Xie (kxie@chelsio.com)
 *		Rakesh Ranjan (rranjan@chelsio.com)
 */

#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <scsi/scsi_host.h>
#include <net/tcp.h>
#include <net/dst.h>
#include <linux/netdevice.h>
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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"

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"
#define	DRV_MODULE_VERSION	"0.9.4"
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static char version[] =
	DRV_MODULE_DESC " " DRV_MODULE_NAME
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	" v" DRV_MODULE_VERSION "\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)");

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

static int cxgb4i_snd_win = 128 * 1024;
module_param(cxgb4i_snd_win, int, 0644);
MODULE_PARM_DESC(cxgb4i_snd_win, "TCP send window in bytes");

static int cxgb4i_rx_credit_thres = 10 * 1024;
module_param(cxgb4i_rx_credit_thres, int, 0644);
MODULE_PARM_DESC(cxgb4i_rx_credit_thres,
		"RX credits return threshold in bytes (default=10KB)");

static unsigned int cxgb4i_max_connect = (8 * 1024);
module_param(cxgb4i_max_connect, uint, 0644);
MODULE_PARM_DESC(cxgb4i_max_connect, "Maximum number of connections");

static unsigned short cxgb4i_sport_base = 20000;
module_param(cxgb4i_sport_base, ushort, 0644);
MODULE_PARM_DESC(cxgb4i_sport_base, "Starting port number (default 20000)");

typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);

static void *t4_uld_add(const struct cxgb4_lld_info *);
static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
static int t4_uld_state_change(void *, enum cxgb4_state state);
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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,
	.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 DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
#define RCV_BUFSIZ_MASK		0x3FFU
#define MAX_IMM_TX_PKT_LEN	128

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 t4 = is_t4(lldi->adapter_type);
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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) |
		RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10);
	opt2 = RX_CHANNEL_V(0) |
		RSS_QUEUE_VALID_F |
		(RX_FC_DISABLE_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);
	} else {
		struct cpl_t5_act_open_req *req =
				(struct cpl_t5_act_open_req *)skb->head;

		INIT_TP_WR(req, 0);
		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
					qid_atid));
		req->local_port = csk->saddr.sin_port;
		req->peer_port = csk->daddr.sin_port;
		req->local_ip = csk->saddr.sin_addr.s_addr;
		req->peer_ip = csk->daddr.sin_addr.s_addr;
		req->opt0 = cpu_to_be64(opt0);
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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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		opt2 |= 1 << 31;
		req->opt2 = cpu_to_be32(opt2);

		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
			"csk t5 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
			csk, &req->local_ip, ntohs(req->local_port),
			&req->peer_ip, ntohs(req->peer_port),
			csk->atid, csk->rss_qid);
	}

	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
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	pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
		       (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
		       csk->state, csk->flags, csk->atid, csk->rss_qid);

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

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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 t4 = is_t4(lldi->adapter_type);
	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
	unsigned long long opt0;
	unsigned int opt2;
	unsigned int qid_atid = ((unsigned int)csk->atid) |
				 (((unsigned int)csk->rss_qid) << 14);

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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) |
		RCV_BUFSIZ_V(cxgb4i_rcv_win >> 10);
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	opt2 = RX_CHANNEL_V(0) |
		RSS_QUEUE_VALID_F |
		RX_FC_DISABLE_F |
		RSS_QUEUE_V(csk->rss_qid);
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	if (t4) {
		struct cpl_act_open_req6 *req =
			    (struct cpl_act_open_req6 *)skb->head;

		INIT_TP_WR(req, 0);
		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
							    qid_atid));
		req->local_port = csk->saddr6.sin6_port;
		req->peer_port = csk->daddr6.sin6_port;

		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
								    8);
		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
								    8);

		req->opt0 = cpu_to_be64(opt0);

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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));
	} else {
		struct cpl_t5_act_open_req6 *req =
				(struct cpl_t5_act_open_req6 *)skb->head;

		INIT_TP_WR(req, 0);
		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
							    qid_atid));
		req->local_port = csk->saddr6.sin6_port;
		req->peer_port = csk->daddr6.sin6_port;
		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
									8);
		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
									8);
		req->opt0 = cpu_to_be64(opt0);

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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)));
	}

	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);

	pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
		t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
		&csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
		&csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
		csk->rss_qid);

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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);
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	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;
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	set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
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	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);

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	skb = alloc_wr(sizeof(*req), 0, GFP_ATOMIC);
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	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));
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	req->credit_dack = cpu_to_be32(RX_CREDITS_V(credits)
				       | RX_FORCE_ACK_F);
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	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;
494
	if (skb_tail_pointer(skb) != skb_transport_header(skb))
495 496 497 498
		cnt++;
	return flits + sgl_len(cnt);
}

499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520
#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)
521 522 523
{
	struct sk_buff *skb;
	struct fw_flowc_wr *flowc;
524
	int nparams, flowclen16, flowclen;
525

526
	flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen);
527
	skb = alloc_wr(flowclen, 0, GFP_ATOMIC);
528 529
	flowc = (struct fw_flowc_wr *)skb->head;
	flowc->op_to_nparams =
530
		htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));
531
	flowc->flowid_len16 =
532
		htonl(FW_WR_LEN16_V(flowclen16) | FW_WR_FLOWID_V(csk->tid));
533
	flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
534
	flowc->mnemval[0].val = htonl(csk->cdev->pfvf);
535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
	flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
	flowc->mnemval[1].val = htonl(csk->tx_chan);
	flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
	flowc->mnemval[2].val = htonl(csk->tx_chan);
	flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
	flowc->mnemval[3].val = htonl(csk->rss_qid);
	flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
	flowc->mnemval[4].val = htonl(csk->snd_nxt);
	flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
	flowc->mnemval[5].val = htonl(csk->rcv_nxt);
	flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
	flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
	flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
	flowc->mnemval[7].val = htonl(csk->advmss);
	flowc->mnemval[8].mnemonic = 0;
	flowc->mnemval[8].val = 0;
551 552 553
	flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_TXDATAPLEN_MAX;
	flowc->mnemval[8].val = 16384;

554
	set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
555 556 557 558 559 560 561 562

	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
		"csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
		csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
		csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
		csk->advmss);

	cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
563 564

	return flowclen16;
565 566 567 568 569 570 571
}

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;
572
	unsigned int wr_ulp_mode = 0, val;
573
	bool imm = is_ofld_imm(skb);
574 575 576

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

577
	if (imm) {
578 579 580 581 582
		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));
583 584
	} else {
		req->op_to_immdlen =
585 586 587
			cpu_to_be32(FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
					FW_WR_COMPL_F |
					FW_WR_IMMDLEN_V(0));
588
		req->flowid_len16 =
589 590
			cpu_to_be32(FW_WR_FLOWID_V(csk->tid) |
					FW_WR_LEN16_V(credits));
591 592
	}
	if (submode)
593 594 595
		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
596
	req->tunnel_to_proxy = htonl(wr_ulp_mode |
597
				     FW_OFLD_TX_DATA_WR_SHOVE_V(val));
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
	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;
626
		int flowclen16 = 0;
627 628 629

		skb_reset_transport_header(skb);
		if (is_ofld_imm(skb))
630
			credits_needed = DIV_ROUND_UP(dlen, 16);
631
		else
632 633 634 635 636 637 638
			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),
639 640
					16);

641 642 643 644 645 646 647 648 649 650 651
		/*
		 * 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);
		}

652 653 654 655 656 657 658 659
		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);
660
		set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id);
661
		skb->csum = credits_needed + flowclen16;
662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706
		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);
		}
		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);
707
	unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
708 709 710 711 712 713 714 715 716 717
	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;
	}

718 719 720 721 722 723
	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;
	}

724 725 726 727 728
	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);
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754

	cxgbi_sock_get(csk);
	csk->tid = tid;
	cxgb4_insert_tid(lldi->tids, csk, tid);
	cxgbi_sock_set_flag(csk, CTPF_HAS_TID);

	free_atid(csk);

	spin_lock_bh(&csk->lock);
	if (unlikely(csk->state != CTP_ACTIVE_OPEN))
		pr_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
			csk, csk->state, csk->flags, csk->tid);

	if (csk->retry_timer.function) {
		del_timer(&csk->retry_timer);
		csk->retry_timer.function = NULL;
	}

	csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
	/*
	 * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
	 * pass through opt0.
	 */
	if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
		csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);

755 756
	csk->advmss = lldi->mtus[TCPOPT_MSS_G(tcp_opt)] - 40;
	if (TCPOPT_TSTAMP_G(tcp_opt))
757 758 759 760 761 762
		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",
763
			csk, TCPOPT_MSS_G(tcp_opt), csk->advmss);
764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799

	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)
{
800
	struct sk_buff *skb = NULL;
801
	struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
802
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
803 804 805
	void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
				   struct l2t_entry *);
	int t4 = is_t4(lldi->adapter_type), size, size6;
806 807 808 809 810 811 812

	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);
813 814 815 816 817 818 819 820 821 822 823 824

	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);
825
#if IS_ENABLED(CONFIG_IPV6)
826 827 828
	} else {
		send_act_open_func = send_act_open_req6;
		skb = alloc_wr(size6, 0, GFP_ATOMIC);
829
#endif
830 831
	}

832 833 834 835 836
	if (!skb)
		cxgbi_sock_fail_act_open(csk, -ENOMEM);
	else {
		skb->sk = (struct sock *)csk;
		t4_set_arp_err_handler(skb, csk,
837 838
				       cxgbi_sock_act_open_req_arp_failure);
		send_act_open_func(csk, skb, csk->l2t);
839
	}
840

841 842
	spin_unlock_bh(&csk->lock);
	cxgbi_sock_put(csk);
843

844 845
}

846 847 848 849 850 851 852
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;
}

853 854 855 856 857 858
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 =
859 860
		TID_TID_G(AOPEN_ATID_G(be32_to_cpu(rpl->atid_status)));
	unsigned int status = AOPEN_STATUS_G(be32_to_cpu(rpl->atid_status));
861 862 863 864 865 866 867 868 869
	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;
	}

870 871 872
	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);
873

874
	if (is_neg_adv(status))
875 876
		goto rel_skb;

877 878
	module_put(THIS_MODULE);

879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
	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;
	}
914 915 916
	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
		       (&csk->saddr), (&csk->daddr),
		       csk, csk->state, csk->flags, csk->tid);
917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
	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;
	}
935 936 937
	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
		       (&csk->saddr), (&csk->daddr),
		       csk, csk->state, csk->flags, csk->tid);
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975
	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;
	}

976 977 978
	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);
979

980
	if (is_neg_adv(req->status))
981 982 983 984 985
		goto rel_skb;

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

A
Anish Bhatt 已提交
986 987 988 989 990
	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);
991 992
	}

A
Anish Bhatt 已提交
993 994 995
	cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
	cxgbi_sock_set_state(csk, CTP_ABORTING);

996 997 998 999 1000 1001
	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
1002

1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
	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;

1021 1022 1023 1024
	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);
1025 1026 1027 1028 1029 1030 1031 1032 1033

	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
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
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);
}

1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
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);
1088 1089
	cxgbi_skcb_flags(skb) = 0;

1090 1091 1092 1093 1094 1095
	skb_reset_transport_header(skb);
	__skb_pull(skb, sizeof(*cpl));
	__pskb_trim(skb, ntohs(cpl->len));

	if (!csk->skb_ulp_lhdr) {
		unsigned char *bhs;
1096
		unsigned int hlen, dlen, plen;
1097 1098 1099 1100 1101

		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;
1102
		cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
1103

1104
		if (cxgbi_skcb_tcp_seq(skb) != csk->rcv_nxt) {
1105
			pr_info("tid %u, CPL_ISCSI_HDR, bad seq, 0x%x/0x%x.\n",
1106
				csk->tid, cxgbi_skcb_tcp_seq(skb),
1107 1108 1109 1110
				csk->rcv_nxt);
			goto abort_conn;
		}

1111
		bhs = skb->data;
1112 1113 1114
		hlen = ntohs(cpl->len);
		dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;

1115 1116 1117 1118 1119
		plen = ISCSI_PDU_LEN(pdu_len_ddp);
		if (is_t4(lldi->adapter_type))
			plen -= 40;

		if ((hlen + dlen) != plen) {
1120 1121
			pr_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
				"mismatch %u != %u + %u, seq 0x%x.\n",
1122 1123
				csk->tid, plen, hlen, dlen,
				cxgbi_skcb_tcp_seq(skb));
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138
			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 {
1139
		struct sk_buff *lskb = csk->skb_ulp_lhdr;
1140

1141
		cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
			"csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
			csk, csk->state, csk->flags, skb, lskb);
	}

	__skb_queue_tail(&csk->receive_queue, skb);
	spin_unlock_bh(&csk->lock);
	return;

abort_conn:
	send_abort_req(csk);
discard:
	spin_unlock_bh(&csk->lock);
rel_skb:
	__kfree_skb(skb);
}

static void do_rx_data_ddp(struct cxgbi_device *cdev,
				  struct sk_buff *skb)
{
	struct cxgbi_sock *csk;
	struct sk_buff *lskb;
	struct cpl_rx_data_ddp *rpl = (struct cpl_rx_data_ddp *)skb->data;
	unsigned int tid = GET_TID(rpl);
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
	struct tid_info *t = lldi->tids;
	unsigned int status = ntohl(rpl->ddpvld);

	csk = lookup_tid(t, tid);
	if (unlikely(!csk)) {
		pr_err("can't find connection for tid %u.\n", tid);
		goto rel_skb;
	}

	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
		"csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
		csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);

	spin_lock_bh(&csk->lock);

	if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
			"csk 0x%p,%u,0x%lx,%u, bad state.\n",
			csk, csk->state, csk->flags, csk->tid);
		if (csk->state != CTP_ABORTING)
			goto abort_conn;
		else
			goto discard;
	}

	if (!csk->skb_ulp_lhdr) {
		pr_err("tid 0x%x, rcv RX_DATA_DDP w/o pdu bhs.\n", csk->tid);
		goto abort_conn;
	}

	lskb = csk->skb_ulp_lhdr;
	csk->skb_ulp_lhdr = NULL;

	cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);

	if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb))
		pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
			csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));

	if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
1207 1208
		pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
			csk, lskb, status, cxgbi_skcb_flags(lskb));
1209 1210 1211
		cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
	}
	if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
1212 1213
		pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
			csk, lskb, status, cxgbi_skcb_flags(lskb));
1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232
		cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
	}
	if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
		log_debug(1 << CXGBI_DBG_PDU_RX,
			"csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
			csk, lskb, status);
		cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
	}
	if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
		!cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
		log_debug(1 << CXGBI_DBG_PDU_RX,
			"csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
			csk, lskb, status);
		cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
	}
	log_debug(1 << CXGBI_DBG_PDU_RX,
		"csk 0x%p, lskb 0x%p, f 0x%lx.\n",
		csk, lskb, cxgbi_skcb_flags(lskb));

1233
	cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
1234 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
	cxgbi_conn_pdu_ready(csk);
	spin_unlock_bh(&csk->lock);
	goto rel_skb;

abort_conn:
	send_abort_req(csk);
discard:
	spin_unlock_bh(&csk->lock);
rel_skb:
	__kfree_skb(skb);
}

static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
{
	struct cxgbi_sock *csk;
	struct cpl_fw4_ack *rpl = (struct cpl_fw4_ack *)skb->data;
	unsigned int tid = GET_TID(rpl);
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
	struct tid_info *t = lldi->tids;

	csk = lookup_tid(t, tid);
	if (unlikely(!csk))
		pr_err("can't find connection for tid %u.\n", tid);
	else {
		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
			"csk 0x%p,%u,0x%lx,%u.\n",
			csk, csk->state, csk->flags, csk->tid);
		cxgbi_sock_rcv_wr_ack(csk, rpl->credits, ntohl(rpl->snd_una),
					rpl->seq_vld);
	}
	__kfree_skb(skb);
}

static void do_set_tcb_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
{
	struct cpl_set_tcb_rpl *rpl = (struct cpl_set_tcb_rpl *)skb->data;
	unsigned int tid = GET_TID(rpl);
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
	struct tid_info *t = lldi->tids;
	struct cxgbi_sock *csk;

	csk = lookup_tid(t, tid);
	if (!csk)
		pr_err("can't find conn. for tid %u.\n", tid);

	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
		"csk 0x%p,%u,%lx,%u, status 0x%x.\n",
		csk, csk->state, csk->flags, csk->tid, rpl->status);

	if (rpl->status != CPL_ERR_NONE)
		pr_err("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
			csk, tid, rpl->status);

	__kfree_skb(skb);
}

static int alloc_cpls(struct cxgbi_sock *csk)
{
1292 1293
	csk->cpl_close = alloc_wr(sizeof(struct cpl_close_con_req),
					0, GFP_KERNEL);
1294 1295 1296
	if (!csk->cpl_close)
		return -ENOMEM;

1297 1298
	csk->cpl_abort_req = alloc_wr(sizeof(struct cpl_abort_req),
					0, GFP_KERNEL);
1299 1300 1301
	if (!csk->cpl_abort_req)
		goto free_cpls;

1302 1303
	csk->cpl_abort_rpl = alloc_wr(sizeof(struct cpl_abort_rpl),
					0, GFP_KERNEL);
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 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354
	if (!csk->cpl_abort_rpl)
		goto free_cpls;
	return 0;

free_cpls:
	cxgbi_sock_free_cpl_skbs(csk);
	return -ENOMEM;
}

static inline void l2t_put(struct cxgbi_sock *csk)
{
	if (csk->l2t) {
		cxgb4_l2t_release(csk->l2t);
		csk->l2t = NULL;
		cxgbi_sock_put(csk);
	}
}

static void release_offload_resources(struct cxgbi_sock *csk)
{
	struct cxgb4_lld_info *lldi;

	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
		"csk 0x%p,%u,0x%lx,%u.\n",
		csk, csk->state, csk->flags, csk->tid);

	cxgbi_sock_free_cpl_skbs(csk);
	if (csk->wr_cred != csk->wr_max_cred) {
		cxgbi_sock_purge_wr_queue(csk);
		cxgbi_sock_reset_wr_list(csk);
	}

	l2t_put(csk);
	if (cxgbi_sock_flag(csk, CTPF_HAS_ATID))
		free_atid(csk);
	else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) {
		lldi = cxgbi_cdev_priv(csk->cdev);
		cxgb4_remove_tid(lldi->tids, 0, csk->tid);
		cxgbi_sock_clear_flag(csk, CTPF_HAS_TID);
		cxgbi_sock_put(csk);
	}
	csk->dst = NULL;
	csk->cdev = NULL;
}

static int init_act_open(struct cxgbi_sock *csk)
{
	struct cxgbi_device *cdev = csk->cdev;
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
	struct net_device *ndev = cdev->ports[csk->port_id];
	struct sk_buff *skb = NULL;
1355 1356
	struct neighbour *n = NULL;
	void *daddr;
1357
	unsigned int step;
1358 1359
	unsigned int size, size6;
	int t4 = is_t4(lldi->adapter_type);
1360 1361 1362 1363 1364

	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);

1365 1366
	if (csk->csk_family == AF_INET)
		daddr = &csk->daddr.sin_addr.s_addr;
1367 1368
#if IS_ENABLED(CONFIG_IPV6)
	else if (csk->csk_family == AF_INET6)
1369
		daddr = &csk->daddr6.sin6_addr;
1370 1371 1372 1373 1374
#endif
	else {
		pr_err("address family 0x%x not supported\n", csk->csk_family);
		goto rel_resource;
	}
1375 1376 1377 1378 1379 1380 1381 1382

	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;
	}

1383 1384 1385 1386 1387 1388 1389 1390
	csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
	if (csk->atid < 0) {
		pr_err("%s, NO atid available.\n", ndev->name);
		return -EINVAL;
	}
	cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
	cxgbi_sock_get(csk);

1391
	csk->l2t = cxgb4_l2t_get(lldi->l2t, n, ndev, 0);
1392 1393 1394 1395 1396 1397
	if (!csk->l2t) {
		pr_err("%s, cannot alloc l2t.\n", ndev->name);
		goto rel_resource;
	}
	cxgbi_sock_get(csk);

1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
	if (t4) {
		size = sizeof(struct cpl_act_open_req);
		size6 = sizeof(struct cpl_act_open_req6);
	} else {
		size = sizeof(struct cpl_t5_act_open_req);
		size6 = sizeof(struct cpl_t5_act_open_req6);
	}

	if (csk->csk_family == AF_INET)
		skb = alloc_wr(size, 0, GFP_NOIO);
1408
#if IS_ENABLED(CONFIG_IPV6)
1409 1410
	else
		skb = alloc_wr(size6, 0, GFP_NOIO);
1411
#endif
1412

1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
	if (!skb)
		goto rel_resource;
	skb->sk = (struct sock *)csk;
	t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);

	if (!csk->mtu)
		csk->mtu = dst_mtu(csk->dst);
	cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
	csk->tx_chan = cxgb4_port_chan(ndev);
	/* SMT two entries per row */
	csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
	step = lldi->ntxq / lldi->nchan;
	csk->txq_idx = cxgb4_port_idx(ndev) * step;
	step = lldi->nrxq / lldi->nchan;
	csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
1428 1429 1430
	csk->wr_cred = lldi->wr_cred -
		       DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
	csk->wr_max_cred = csk->wr_cred;
1431 1432 1433 1434
	csk->wr_una_cred = 0;
	cxgbi_sock_reset_wr_list(csk);
	csk->err = 0;

1435 1436 1437 1438 1439 1440 1441
	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);
1442
	cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
1443 1444
	if (csk->csk_family == AF_INET)
		send_act_open_req(csk, skb, csk->l2t);
1445
#if IS_ENABLED(CONFIG_IPV6)
1446 1447
	else
		send_act_open_req6(csk, skb, csk->l2t);
1448
#endif
1449
	neigh_release(n);
1450

1451 1452 1453
	return 0;

rel_resource:
1454 1455
	if (n)
		neigh_release(n);
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469
	if (skb)
		__kfree_skb(skb);
	return -EINVAL;
}

cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
	[CPL_ACT_ESTABLISH] = do_act_establish,
	[CPL_ACT_OPEN_RPL] = do_act_open_rpl,
	[CPL_PEER_CLOSE] = do_peer_close,
	[CPL_ABORT_REQ_RSS] = do_abort_req_rss,
	[CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
	[CPL_CLOSE_CON_RPL] = do_close_con_rpl,
	[CPL_FW4_ACK] = do_fw4_ack,
	[CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
1470
	[CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
1471 1472
	[CPL_SET_TCB_RPL] = do_set_tcb_rpl,
	[CPL_RX_DATA_DDP] = do_rx_data_ddp,
1473
	[CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
K
Karen Xie 已提交
1474
	[CPL_RX_DATA] = do_rx_data,
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503
};

int cxgb4i_ofld_init(struct cxgbi_device *cdev)
{
	int rc;

	if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
		cxgb4i_max_connect = CXGB4I_MAX_CONN;

	rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
					cxgb4i_max_connect);
	if (rc < 0)
		return rc;

	cdev->csk_release_offload_resources = release_offload_resources;
	cdev->csk_push_tx_frames = push_tx_frames;
	cdev->csk_send_abort_req = send_abort_req;
	cdev->csk_send_close_req = send_close_req;
	cdev->csk_send_rx_credits = send_rx_credits;
	cdev->csk_alloc_cpls = alloc_cpls;
	cdev->csk_init_act_open = init_act_open;

	pr_info("cdev 0x%p, offload up, added.\n", cdev);
	return 0;
}

/*
 * functions to program the pagepod in h/w
 */
1504
#define ULPMEM_IDATA_MAX_NPPODS	4 /* 256/PPOD_SIZE */
1505 1506
static inline void ulp_mem_io_set_hdr(struct cxgb4_lld_info *lldi,
				struct ulp_mem_io *req,
1507 1508
				unsigned int wr_len, unsigned int dlen,
				unsigned int pm_addr)
1509
{
1510
	struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1);
1511 1512

	INIT_ULPTX_WR(req, wr_len, 0, 0);
1513
	if (is_t4(lldi->adapter_type))
1514 1515
		req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
					(ULP_MEMIO_ORDER_F));
1516
	else
1517 1518 1519 1520
		req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) |
					(T5_ULP_MEMIO_IMM_F));
	req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5));
	req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5));
1521
	req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
1522

1523
	idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM));
1524
	idata->len = htonl(dlen);
1525 1526
}

1527
static int ddp_ppod_write_idata(struct cxgbi_device *cdev, unsigned int port_id,
1528 1529 1530 1531 1532 1533
				struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
				unsigned int npods,
				struct cxgbi_gather_list *gl,
				unsigned int gl_pidx)
{
	struct cxgbi_ddp_info *ddp = cdev->ddp;
1534
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
1535 1536
	struct sk_buff *skb;
	struct ulp_mem_io *req;
1537
	struct ulptx_idata *idata;
1538
	struct cxgbi_pagepod *ppod;
1539 1540 1541 1542
	unsigned int pm_addr = idx * PPOD_SIZE + ddp->llimit;
	unsigned int dlen = PPOD_SIZE * npods;
	unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
				sizeof(struct ulptx_idata) + dlen, 16);
1543 1544
	unsigned int i;

1545
	skb = alloc_wr(wr_len, 0, GFP_ATOMIC);
1546 1547 1548 1549 1550 1551
	if (!skb) {
		pr_err("cdev 0x%p, idx %u, npods %u, OOM.\n",
			cdev, idx, npods);
		return -ENOMEM;
	}
	req = (struct ulp_mem_io *)skb->head;
1552
	set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
1553

1554
	ulp_mem_io_set_hdr(lldi, req, wr_len, dlen, pm_addr);
1555 1556
	idata = (struct ulptx_idata *)(req + 1);
	ppod = (struct cxgbi_pagepod *)(idata + 1);
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577

	for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
		if (!hdr && !gl)
			cxgbi_ddp_ppod_clear(ppod);
		else
			cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
	}

	cxgb4_ofld_send(cdev->ports[port_id], skb);
	return 0;
}

static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
			unsigned int idx, unsigned int npods,
			struct cxgbi_gather_list *gl)
{
	unsigned int i, cnt;
	int err = 0;

	for (i = 0; i < npods; i += cnt, idx += cnt) {
		cnt = npods - i;
1578 1579 1580
		if (cnt > ULPMEM_IDATA_MAX_NPPODS)
			cnt = ULPMEM_IDATA_MAX_NPPODS;
		err = ddp_ppod_write_idata(csk->cdev, csk->port_id, hdr,
1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
					idx, cnt, gl, 4 * i);
		if (err < 0)
			break;
	}
	return err;
}

static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
			  unsigned int idx, unsigned int npods)
{
	unsigned int i, cnt;
	int err;

	for (i = 0; i < npods; i += cnt, idx += cnt) {
		cnt = npods - i;
1596 1597 1598
		if (cnt > ULPMEM_IDATA_MAX_NPPODS)
			cnt = ULPMEM_IDATA_MAX_NPPODS;
		err = ddp_ppod_write_idata(chba->cdev, chba->port_id, NULL,
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610
					idx, cnt, NULL, 0);
		if (err < 0)
			break;
	}
}

static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
				int pg_idx, bool reply)
{
	struct sk_buff *skb;
	struct cpl_set_tcb_field *req;

1611
	if (!pg_idx || pg_idx >= DDP_PGIDX_MAX)
1612 1613
		return 0;

1614
	skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1615 1616 1617
	if (!skb)
		return -ENOMEM;

1618
	/*  set up ulp page size */
1619 1620 1621 1622
	req = (struct cpl_set_tcb_field *)skb->head;
	INIT_TP_WR(req, csk->tid);
	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
	req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1623 1624 1625
	req->word_cookie = htons(0);
	req->mask = cpu_to_be64(0x3 << 8);
	req->val = cpu_to_be64(pg_idx << 8);
1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640
	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;

1641 1642
	if (!hcrc && !dcrc)
		return 0;
1643

1644
	skb = alloc_wr(sizeof(*req), 0, GFP_KERNEL);
1645 1646 1647 1648 1649
	if (!skb)
		return -ENOMEM;

	csk->hcrc_len = (hcrc ? 4 : 0);
	csk->dcrc_len = (dcrc ? 4 : 0);
1650
	/*  set up ulp submode */
1651 1652 1653 1654
	req = (struct cpl_set_tcb_field *)skb->head;
	INIT_TP_WR(req, tid);
	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
	req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
1655 1656 1657 1658
	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);
1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
	set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);

	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
		"csk 0x%p, tid 0x%x, crc %d,%d.\n", csk, csk->tid, hcrc, dcrc);

	cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
	return 0;
}

static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
{
	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
	struct cxgbi_ddp_info *ddp = cdev->ddp;
	unsigned int tagmask, pgsz_factor[4];
	int err;

	if (ddp) {
		kref_get(&ddp->refcnt);
		pr_warn("cdev 0x%p, ddp 0x%p already set up.\n",
			cdev, cdev->ddp);
		return -EALREADY;
	}

	err = cxgbi_ddp_init(cdev, lldi->vr->iscsi.start,
			lldi->vr->iscsi.start + lldi->vr->iscsi.size - 1,
			lldi->iscsi_iolen, lldi->iscsi_iolen);
	if (err < 0)
		return err;

	ddp = cdev->ddp;

	tagmask = ddp->idx_mask << PPOD_IDX_SHIFT;
	cxgbi_ddp_page_size_factor(pgsz_factor);
	cxgb4_iscsi_init(lldi->ports[0], tagmask, pgsz_factor);

	cdev->csk_ddp_setup_digest = ddp_setup_conn_digest;
	cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx;
	cdev->csk_ddp_set = ddp_set_map;
	cdev->csk_ddp_clear = ddp_clear_map;

	pr_info("cxgb4i 0x%p tag: sw %u, rsvd %u,%u, mask 0x%x.\n",
		cdev, cdev->tag_format.sw_bits, cdev->tag_format.rsvd_bits,
		cdev->tag_format.rsvd_shift, cdev->tag_format.rsvd_mask);
	pr_info("cxgb4i 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u, "
		" %u/%u.\n",
		cdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask,
		ddp->rsvd_tag_mask, ddp->max_txsz, lldi->iscsi_iolen,
		ddp->max_rxsz, lldi->iscsi_iolen);
	pr_info("cxgb4i 0x%p max payload size: %u/%u, %u/%u.\n",
		cdev, cdev->tx_max_size, ddp->max_txsz, cdev->rx_max_size,
		ddp->max_rxsz);
	return 0;
}

static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
{
	struct cxgbi_device *cdev;
	struct port_info *pi;
	int i, rc;

	cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
	if (!cdev) {
		pr_info("t4 device 0x%p, register failed.\n", lldi);
		return NULL;
	}
	pr_info("0x%p,0x%x, ports %u,%s, chan %u, q %u,%u, wr %u.\n",
		cdev, lldi->adapter_type, lldi->nports,
		lldi->ports[0]->name, lldi->nchan, lldi->ntxq,
		lldi->nrxq, lldi->wr_cred);
	for (i = 0; i < lldi->nrxq; i++)
		log_debug(1 << CXGBI_DBG_DEV,
			"t4 0x%p, rxq id #%d: %u.\n",
			cdev, i, lldi->rxq_ids[i]);

	memcpy(cxgbi_cdev_priv(cdev), lldi, sizeof(*lldi));
	cdev->flags = CXGBI_FLAG_DEV_T4;
	cdev->pdev = lldi->pdev;
	cdev->ports = lldi->ports;
	cdev->nports = lldi->nports;
	cdev->mtus = lldi->mtus;
	cdev->nmtus = NMTUS;
	cdev->snd_win = cxgb4i_snd_win;
	cdev->rcv_win = cxgb4i_rcv_win;
	cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
	cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
	cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
	cdev->itp = &cxgb4i_iscsi_transport;

1747 1748
	cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
			<< FW_VIID_PFN_S;
1749 1750 1751
	pr_info("cdev 0x%p,%s, pfvf %u.\n",
		cdev, lldi->ports[0]->name, cdev->pfvf);

1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790
	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;

1791
		skb = alloc_wr(len, 0, GFP_ATOMIC);
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
		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);
1842
		cxgbi_device_unregister(cdev);
1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860
		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);
1861

1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873
	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);