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Message-Id: <201008091753.o79HrTmr020149@localhost.localdomain>
Date: Mon, 09 Aug 2010 10:53:29 -0700
From: kxie@...lsio.com
To: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
open-iscsi@...glegroups.com
Cc: rranjan@...lsio.com, kxie@...lsio.com,
James.Bottomley@...senPartnership.com, michaelc@...wisc.edu
Subject: [PATCH 2/3] cxgb4i v5: iscsi driver
[PATCH 2/3] cxgb4i v5: iscsi driver
From: Karen Xie <kxie@...lsio.com>
Add cxgb4i iSCSI driver.
This patch implements the cxgb4i iscsi connection acceleration for the
open-iscsi initiator.
The cxgb4i driver offers the iscsi PDU based offload:
- digest insertion and verification
- payload direct-placement into host memory buffer.
Signed-off-by: Karen Xie <kxie@...lsio.com>
---
drivers/scsi/cxgbi/Kconfig | 7
drivers/scsi/cxgbi/Makefile | 1
drivers/scsi/cxgbi/cxgb4i/Kbuild | 3
drivers/scsi/cxgbi/cxgb4i/cxgb4i.c | 1551 ++++++++++++++++++++++++++++++++++++
drivers/scsi/cxgbi/cxgb4i/cxgb4i.h | 42 +
5 files changed, 1604 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/cxgbi/Kconfig
create mode 100644 drivers/scsi/cxgbi/Makefile
create mode 100644 drivers/scsi/cxgbi/cxgb4i/Kbuild
create mode 100644 drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
create mode 100644 drivers/scsi/cxgbi/cxgb4i/cxgb4i.h
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 158284f..704622d 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -371,6 +371,7 @@ config ISCSI_TCP
http://open-iscsi.org
source "drivers/scsi/cxgb3i/Kconfig"
+source "drivers/scsi/cxgbi/Kconfig"
source "drivers/scsi/bnx2i/Kconfig"
source "drivers/scsi/be2iscsi/Kconfig"
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 2a3fca2..1694ab7 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -133,6 +133,7 @@ obj-$(CONFIG_SCSI_STEX) += stex.o
obj-$(CONFIG_SCSI_MVSAS) += mvsas/
obj-$(CONFIG_PS3_ROM) += ps3rom.o
obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgb3i/
+obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libiscsi.o libiscsi_tcp.o cxgbi/
obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/
obj-$(CONFIG_BE2ISCSI) += libiscsi.o be2iscsi/
obj-$(CONFIG_SCSI_PMCRAID) += pmcraid.o
diff --git a/drivers/scsi/cxgbi/Kconfig b/drivers/scsi/cxgbi/Kconfig
new file mode 100644
index 0000000..96c887a
--- /dev/null
+++ b/drivers/scsi/cxgbi/Kconfig
@@ -0,0 +1,7 @@
+config SCSI_CXGB4_ISCSI
+ tristate "Chelsio T4 iSCSI support"
+ depends on CHELSIO_T4_DEPENDS
+ select CHELSIO_T4
+ select SCSI_ISCSI_ATTRS
+ ---help---
+ This driver supports iSCSI offload for the Chelsio T4 devices.
diff --git a/drivers/scsi/cxgbi/Makefile b/drivers/scsi/cxgbi/Makefile
new file mode 100644
index 0000000..9e8f604
--- /dev/null
+++ b/drivers/scsi/cxgbi/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libcxgbi.o cxgb4i/
diff --git a/drivers/scsi/cxgbi/cxgb4i/Kbuild b/drivers/scsi/cxgbi/cxgb4i/Kbuild
new file mode 100644
index 0000000..b9f4af7
--- /dev/null
+++ b/drivers/scsi/cxgbi/cxgb4i/Kbuild
@@ -0,0 +1,3 @@
+EXTRA_CFLAGS += -I$(srctree)/drivers/net/cxgb4
+
+obj-$(CONFIG_SCSI_CXGB4_ISCSI) += cxgb4i.o
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
new file mode 100644
index 0000000..6391d69
--- /dev/null
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -0,0 +1,1551 @@
+/*
+ * 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@...lsio.com)
+ * Rakesh Ranjan (rranjan@...lsio.com)
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <scsi/scsi_host.h>
+#include <net/tcp.h>
+#include <net/dst.h>
+#include <linux/netdevice.h>
+
+#include "t4_msg.h"
+#include "cxgb4.h"
+#include "cxgb4_uld.h"
+#include "t4fw_api.h"
+#include "l2t.h"
+#include "cxgb4i.h"
+
+#define DRV_MODULE_NAME "cxgb4i"
+#define DRV_MODULE_DESC "Chelsio T4 iSCSI Driver"
+#define DRV_MODULE_VERSION "0.9.0"
+#define DRV_MODULE_RELDATE "May 2010"
+
+static char version[] =
+ DRV_MODULE_DESC " " DRV_MODULE_NAME
+ " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+MODULE_AUTHOR("Chelsio Communications, Inc.");
+MODULE_DESCRIPTION(DRV_MODULE_DESC);
+MODULE_VERSION(DRV_MODULE_VERSION);
+MODULE_LICENSE("GPL");
+
+unsigned int dbg_level;
+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)");
+
+#define cxgb4i_log_error cxgbi_dbg_error
+#define cxgb4i_log_warn cxgbi_dbg_warn
+#define cxgb4i_log_info cxgbi_dbg_info
+#define cxgb4i_log_debug(level, fmt, args...) \
+ cxgbi_dbg_print(level, fmt, ## args)
+
+static void *t4_uld_add(const struct cxgb4_lld_info *);
+static int t4_uld_rx_handler(void *, const __be64 *, const struct pkt_gl *);
+static int t4_uld_state_change(void *, enum cxgb4_state state);
+
+static const struct cxgb4_uld_info cxgb4i_uld_info = {
+ .name = DRV_MODULE_NAME,
+ .add = t4_uld_add,
+ .rx_handler = t4_uld_rx_handler,
+ .state_change = t4_uld_state_change,
+};
+
+static struct scsi_host_template cxgb4i_host_template = {
+ .module = THIS_MODULE,
+ .name = DRV_MODULE_NAME,
+ .proc_name = DRV_MODULE_NAME,
+ .can_queue = CXGB4I_SCSI_HOST_QDEPTH,
+};
+
+static struct iscsi_transport cxgb4i_iscsi_transport = {
+ .owner = THIS_MODULE,
+ .name = DRV_MODULE_NAME,
+};
+
+/*
+ * CPL (Chelsio Protocol Language) defines a message passing interface between
+ * the host driver and Chelsio asic.
+ * The section below implments CPLs that related to iscsi tcp connection
+ * open/close/abort and data send/receive.
+ */
+#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+#define RCV_BUFSIZ_MASK 0x3FFU
+#define MAX_IMM_TX_PKT_LEN 128
+
+static inline void set_queue(struct sk_buff *skb, unsigned int queue,
+ const struct cxgbi_sock *csk)
+{
+ skb->queue_mapping = queue;
+}
+
+static int push_tx_frames(struct cxgbi_sock *, int);
+
+/*
+ * is_ofld_imm - check whether a packet can be sent as immediate data
+ * @skb: the packet
+ *
+ * Returns true if a packet can be sent as an offload WR with immediate
+ * data. We currently use the same limit as for Ethernet packets.
+ */
+static inline int is_ofld_imm(const struct sk_buff *skb)
+{
+ return skb->len <= (MAX_IMM_TX_PKT_LEN -
+ sizeof(struct fw_ofld_tx_data_wr));
+}
+
+static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
+ struct l2t_entry *e)
+{
+ struct cpl_act_open_req *req;
+ int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
+ unsigned long long opt0;
+ unsigned int opt2;
+ unsigned int qid_atid = ((unsigned int)csk->atid) |
+ (((unsigned int)csk->rss_qid) << 14);
+
+ opt0 = KEEP_ALIVE(1) |
+ WND_SCALE(wscale) |
+ MSS_IDX(csk->mss_idx) |
+ L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
+ TX_CHAN(csk->tx_chan) |
+ SMAC_SEL(csk->smac_idx) |
+ ULP_MODE(ULP_MODE_ISCSI) |
+ RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
+ opt2 = RX_CHANNEL(0) |
+ RSS_QUEUE_VALID |
+ (1 << 20) | (1 << 22) |
+ RSS_QUEUE(csk->rss_qid);
+
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
+ req = (struct cpl_act_open_req *)skb->head;
+
+ INIT_TP_WR(req, 0);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
+ qid_atid));
+ req->local_port = csk->saddr.sin_port;
+ req->peer_port = csk->daddr.sin_port;
+ req->local_ip = csk->saddr.sin_addr.s_addr;
+ req->peer_ip = csk->daddr.sin_addr.s_addr;
+ req->opt0 = cpu_to_be64(opt0);
+ req->params = 0;
+ req->opt2 = cpu_to_be32(opt2);
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 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);
+
+ cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
+}
+
+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;
+
+ cxgb4i_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);
+
+ 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;
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx, tid %u, abort.\n",
+ csk, csk->state, csk->flags, csk->tid);
+ req = (struct cpl_abort_req *)skb->data;
+ req->cmd = CPL_ABORT_NO_RST;
+ cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
+}
+
+static void send_abort_req(struct cxgbi_sock *csk)
+{
+ struct cpl_abort_req *req;
+ struct sk_buff *skb = csk->cpl_abort_req;
+
+ if (unlikely(csk->state == CTP_ABORTING) || !skb || !csk->cdev)
+ return;
+ cxgbi_sock_set_state(csk, CTP_ABORTING);
+ cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING);
+ cxgbi_sock_purge_write_queue(csk);
+
+ csk->cpl_abort_req = NULL;
+ req = (struct cpl_abort_req *)skb->head;
+ set_queue(skb, CPL_PRIORITY_DATA, csk);
+ req->cmd = CPL_ABORT_SEND_RST;
+ t4_set_arp_err_handler(skb, csk, abort_arp_failure);
+ INIT_TP_WR(req, csk->tid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid));
+ req->rsvd0 = htonl(csk->snd_nxt);
+ req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT);
+
+ cxgb4i_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;
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, status %d.\n",
+ csk, csk->state, csk->flags, csk->tid, rst_status);
+
+ csk->cpl_abort_rpl = NULL;
+ set_queue(skb, CPL_PRIORITY_DATA, csk);
+ INIT_TP_WR(rpl, csk->tid);
+ OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid));
+ rpl->cmd = rst_status;
+ cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
+}
+
+/*
+ * CPL connection rx data ack: host ->
+ * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of
+ * credits sent.
+ */
+static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits)
+{
+ struct sk_buff *skb;
+ struct cpl_rx_data_ack *req;
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, credit %u.\n",
+ csk, csk->state, csk->flags, csk->tid, credits);
+
+ skb = alloc_cpl(sizeof(*req), 0, GFP_ATOMIC);
+ if (!skb) {
+ cxgb4i_log_info("csk 0x%p, credit %u, OOM.\n", csk, credits);
+ return 0;
+ }
+ req = (struct cpl_rx_data_ack *)skb->head;
+
+ set_wr_txq(skb, CPL_PRIORITY_ACK, csk->port_id);
+ INIT_TP_WR(req, csk->tid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
+ csk->tid));
+ req->credit_dack = cpu_to_be32(RX_CREDITS(credits) | RX_FORCE_ACK(1));
+ cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
+ return credits;
+}
+
+/*
+ * sgl_len - calculates the size of an SGL of the given capacity
+ * @n: the number of SGL entries
+ * Calculates the number of flits needed for a scatter/gather list that
+ * can hold the given number of entries.
+ */
+static inline unsigned int sgl_len(unsigned int n)
+{
+ n--;
+ return (3 * n) / 2 + (n & 1) + 2;
+}
+
+/*
+ * calc_tx_flits_ofld - calculate # of flits for an offload packet
+ * @skb: the packet
+ *
+ * Returns the number of flits needed for the given offload packet.
+ * These packets are already fully constructed and no additional headers
+ * will be added.
+ */
+static inline unsigned int calc_tx_flits_ofld(const struct sk_buff *skb)
+{
+ unsigned int flits, cnt;
+
+ if (is_ofld_imm(skb))
+ return DIV_ROUND_UP(skb->len, 8);
+ flits = skb_transport_offset(skb) / 8;
+ cnt = skb_shinfo(skb)->nr_frags;
+ if (skb->tail != skb->transport_header)
+ cnt++;
+ return flits + sgl_len(cnt);
+}
+
+static inline void send_tx_flowc_wr(struct cxgbi_sock *csk)
+{
+ struct sk_buff *skb;
+ struct fw_flowc_wr *flowc;
+ int flowclen, i;
+
+ flowclen = 80;
+ skb = alloc_cpl(flowclen, 0, GFP_ATOMIC);
+ flowc = (struct fw_flowc_wr *)skb->head;
+ flowc->op_to_nparams =
+ htonl(FW_WR_OP(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS(8));
+ flowc->flowid_len16 =
+ htonl(FW_WR_LEN16(DIV_ROUND_UP(flowclen, 16)) |
+ FW_WR_FLOWID(csk->tid));
+ flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
+ flowc->mnemval[0].val = htonl(0);
+ flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
+ flowc->mnemval[1].val = htonl(csk->tx_chan);
+ flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
+ flowc->mnemval[2].val = htonl(csk->tx_chan);
+ flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
+ flowc->mnemval[3].val = htonl(csk->rss_qid);
+ flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
+ flowc->mnemval[4].val = htonl(csk->snd_nxt);
+ flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
+ flowc->mnemval[5].val = htonl(csk->rcv_nxt);
+ flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
+ flowc->mnemval[6].val = htonl(cxgb4i_snd_win);
+ flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
+ flowc->mnemval[7].val = htonl(csk->advmss);
+ flowc->mnemval[8].mnemonic = 0;
+ flowc->mnemval[8].val = 0;
+ for (i = 0; i < 9; i++) {
+ flowc->mnemval[i].r4[0] = 0;
+ flowc->mnemval[i].r4[1] = 0;
+ flowc->mnemval[i].r4[2] = 0;
+ }
+ set_queue(skb, CPL_PRIORITY_DATA, csk);
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p, tid 0x%x, %u,%u,%u,%u,%u,%u,%u.\n",
+ csk, csk->tid, 0, csk->tx_chan, csk->rss_qid,
+ csk->snd_nxt, csk->rcv_nxt, cxgb4i_snd_win,
+ csk->advmss);
+
+ cxgb4_ofld_send(csk->cdev->ports[csk->port_id], skb);
+}
+
+static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb,
+ int dlen, int len, u32 credits, int compl)
+{
+ struct fw_ofld_tx_data_wr *req;
+ unsigned int submode = cxgbi_skcb_ulp_mode(skb) & 3;
+ unsigned int wr_ulp_mode = 0;
+
+ req = (struct fw_ofld_tx_data_wr *)__skb_push(skb, sizeof(*req));
+
+ if (is_ofld_imm(skb)) {
+ req->op_to_immdlen = htonl(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL(compl) |
+ FW_WR_IMMDLEN(dlen));
+ req->flowid_len16 = htonl(FW_WR_FLOWID(csk->tid) |
+ FW_WR_LEN16(credits));
+ } else {
+ req->op_to_immdlen =
+ cpu_to_be32(FW_WR_OP(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL(compl) |
+ FW_WR_IMMDLEN(0));
+ req->flowid_len16 =
+ cpu_to_be32(FW_WR_FLOWID(csk->tid) |
+ FW_WR_LEN16(credits));
+ }
+ if (submode)
+ wr_ulp_mode = FW_OFLD_TX_DATA_WR_ULPMODE(ULP2_MODE_ISCSI) |
+ FW_OFLD_TX_DATA_WR_ULPSUBMODE(submode);
+ req->tunnel_to_proxy = htonl(wr_ulp_mode) |
+ FW_OFLD_TX_DATA_WR_SHOVE(skb_peek(&csk->write_queue) ? 0 : 1);
+ req->plen = htonl(len);
+ if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT))
+ cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT);
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p, tid 0x%x, skb 0x%p.\n",
+ csk, csk->tid, skb);
+}
+
+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)) {
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx,%u, in closing state.\n",
+ csk, csk->state, csk->flags, csk->tid);
+ return 0;
+ }
+
+ while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) {
+ int dlen = skb->len;
+ int len = skb->len;
+ unsigned int credits_needed;
+
+ skb_reset_transport_header(skb);
+ if (is_ofld_imm(skb))
+ credits_needed = DIV_ROUND_UP(dlen +
+ sizeof(struct fw_ofld_tx_data_wr), 16);
+ else
+ credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
+ + sizeof(struct fw_ofld_tx_data_wr),
+ 16);
+
+ if (csk->wr_cred < credits_needed) {
+ cxgb4i_log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p, skb %u/%u, wr %d < %u.\n",
+ csk, skb->len, skb->data_len,
+ credits_needed, csk->wr_cred);
+ break;
+ }
+ __skb_unlink(skb, &csk->write_queue);
+ set_queue(skb, CPL_PRIORITY_DATA, csk);
+ skb->csum = credits_needed;
+ csk->wr_cred -= credits_needed;
+ csk->wr_una_cred += credits_needed;
+ cxgbi_sock_enqueue_wr(csk, skb);
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p, enqueue, skb len %u/%u, "
+ "wr %d, left %u, unack %u.\n",
+ csk, skb->len, skb->data_len,
+ credits_needed, csk->wr_cred,
+ csk->wr_una_cred);
+
+ if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) {
+ if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) {
+ send_tx_flowc_wr(csk);
+ skb->csum += 5;
+ csk->wr_cred -= 5;
+ csk->wr_una_cred += 5;
+ }
+ if ((req_completion &&
+ csk->wr_una_cred == credits_needed) ||
+ csk->wr_una_cred >= csk->wr_max_cred >> 1) {
+ req_completion = 1;
+ csk->wr_una_cred = 0;
+ }
+ 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);
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_PDU_TX,
+ "csk 0x%p, tid 0x%x, send skb 0x%p.\n",
+ csk, csk->tid, skb);
+
+ cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
+ }
+ return total_size;
+}
+
+static inline void free_atid(struct cxgbi_sock *csk)
+{
+ struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+
+ if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) {
+ cxgb4_free_atid(lldi->tids, csk->atid);
+ cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID);
+ cxgbi_sock_put(csk);
+ }
+}
+
+static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
+{
+ struct cxgbi_sock *csk;
+ struct cpl_act_establish *req = (struct cpl_act_establish *)skb->data;
+ unsigned short tcp_opt = ntohs(req->tcp_opt);
+ unsigned int tid = GET_TID(req);
+ unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
+ struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
+ struct tid_info *t = lldi->tids;
+ u32 rcv_isn = be32_to_cpu(req->rcv_isn);
+
+ csk = lookup_atid(t, atid);
+ if (unlikely(!csk)) {
+ cxgb4i_log_error("NO connection for atid %u, cdev 0x%p\n",
+ atid, cdev);
+ goto rel_skb;
+ }
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
+ csk, csk->state, csk->flags, tid, atid, rcv_isn);
+
+ 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))
+ cxgb4i_log_info("csk 0x%p,%u,0x%lx,%u, got EST.\n",
+ csk, csk->state, csk->flags, csk->tid);
+
+ if (csk->retry_timer.function) {
+ del_timer(&csk->retry_timer);
+ csk->retry_timer.function = NULL;
+ }
+
+ csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn;
+ /*
+ * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't
+ * pass through opt0.
+ */
+ if (cxgb4i_rcv_win > (RCV_BUFSIZ_MASK << 10))
+ csk->rcv_wup -= cxgb4i_rcv_win - (RCV_BUFSIZ_MASK << 10);
+
+ csk->advmss = lldi->mtus[GET_TCPOPT_MSS(tcp_opt)] - 40;
+ if (GET_TCPOPT_TSTAMP(tcp_opt))
+ csk->advmss -= 12;
+ if (csk->advmss < 128)
+ csk->advmss = 128;
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p, mss_idx %u, advmss %u.\n",
+ csk, GET_TCPOPT_MSS(tcp_opt), csk->advmss);
+
+ cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt));
+
+ if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED)))
+ send_abort_req(csk);
+ else {
+ if (skb_queue_len(&csk->write_queue))
+ push_tx_frames(csk, 0);
+ cxgbi_conn_tx_open(csk);
+ }
+ spin_unlock_bh(&csk->lock);
+
+rel_skb:
+ __kfree_skb(skb);
+}
+
+static int act_open_rpl_status_to_errno(int status)
+{
+ switch (status) {
+ case CPL_ERR_CONN_RESET:
+ return -ECONNREFUSED;
+ case CPL_ERR_ARP_MISS:
+ return -EHOSTUNREACH;
+ case CPL_ERR_CONN_TIMEDOUT:
+ return -ETIMEDOUT;
+ case CPL_ERR_TCAM_FULL:
+ return -ENOMEM;
+ case CPL_ERR_CONN_EXIST:
+ return -EADDRINUSE;
+ default:
+ return -EIO;
+ }
+}
+
+static void csk_act_open_retry_timer(unsigned long data)
+{
+ struct sk_buff *skb;
+ struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
+
+ cxgb4i_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);
+ skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC);
+ if (!skb)
+ cxgbi_sock_fail_act_open(csk, -ENOMEM);
+ else {
+ skb->sk = (struct sock *)csk;
+ t4_set_arp_err_handler(skb, csk,
+ cxgbi_sock_act_open_req_arp_failure);
+ send_act_open_req(csk, skb, csk->l2t);
+ }
+ spin_unlock_bh(&csk->lock);
+ cxgbi_sock_put(csk);
+}
+
+static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
+{
+ struct cxgbi_sock *csk;
+ struct cpl_act_open_rpl *rpl = (struct cpl_act_open_rpl *)skb->data;
+ unsigned int tid = GET_TID(rpl);
+ unsigned int atid =
+ GET_TID_TID(GET_AOPEN_ATID(be32_to_cpu(rpl->atid_status)));
+ unsigned int status = GET_AOPEN_STATUS(be32_to_cpu(rpl->atid_status));
+ struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
+ struct tid_info *t = lldi->tids;
+
+ csk = lookup_atid(t, atid);
+ if (unlikely(!csk)) {
+ cxgb4i_log_error("NO matching conn. atid %u, tid %u.\n",
+ atid, tid);
+ goto rel_skb;
+ }
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx, status %u, atid %u, tid %u.\n",
+ csk, csk->state, csk->flags, status, atid, tid);
+
+ 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)) {
+ cxgb4i_log_error("can't find connection for tid %u\n", tid);
+ goto rel_skb;
+ }
+ 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)) {
+ cxgb4i_log_error("can't find connection for tid %u\n", tid);
+ goto rel_skb;
+ }
+ 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)) {
+ cxgb4i_log_error("can't find connection for tid %u\n", tid);
+ goto rel_skb;
+ }
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
+ csk, csk->state, csk->flags, csk->tid, req->status);
+
+ if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
+ req->status == CPL_ERR_PERSIST_NEG_ADVICE)
+ goto rel_skb;
+
+ cxgbi_sock_get(csk);
+ spin_lock_bh(&csk->lock);
+
+ if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) {
+ cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD);
+ cxgbi_sock_set_state(csk, CTP_ABORTING);
+ goto done;
+ }
+
+ cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD);
+ send_abort_rpl(csk, rst_status);
+
+ if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) {
+ csk->err = abort_status_to_errno(csk, req->status, &rst_status);
+ cxgbi_sock_closed(csk);
+ }
+done:
+ spin_unlock_bh(&csk->lock);
+ cxgbi_sock_put(csk);
+rel_skb:
+ __kfree_skb(skb);
+}
+
+static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
+{
+ struct cxgbi_sock *csk;
+ struct cpl_abort_rpl_rss *rpl = (struct cpl_abort_rpl_rss *)skb->data;
+ unsigned int tid = GET_TID(rpl);
+ struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
+ struct tid_info *t = lldi->tids;
+
+ csk = lookup_tid(t, tid);
+ if (!csk)
+ goto rel_skb;
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
+ rpl->status, csk, csk ? csk->state : 0,
+ csk ? csk->flags : 0UL);
+
+ if (rpl->status == CPL_ERR_ABORT_FAILED)
+ goto rel_skb;
+
+ cxgbi_sock_rcv_abort_rpl(csk);
+rel_skb:
+ __kfree_skb(skb);
+}
+
+static void do_rx_iscsi_hdr(struct cxgbi_device *cdev, struct sk_buff *skb)
+{
+ struct cxgbi_sock *csk;
+ struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
+ unsigned short pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
+ unsigned int tid = GET_TID(cpl);
+ struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
+ struct tid_info *t = lldi->tids;
+ struct sk_buff *lskb;
+
+ csk = lookup_tid(t, tid);
+ if (unlikely(!csk)) {
+ cxgb4i_log_error("can't find conn. for tid %u\n", tid);
+ goto rel_skb;
+ }
+
+ cxgb4i_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)) {
+ cxgb4i_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);
+ skb_reset_transport_header(skb);
+ __skb_pull(skb, sizeof(*cpl));
+ __pskb_trim(skb, ntohs(cpl->len));
+
+ if (!csk->skb_ulp_lhdr) {
+ unsigned char *bhs;
+ unsigned int hlen, dlen;
+
+ cxgb4i_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;
+ lskb = csk->skb_ulp_lhdr;
+ cxgbi_skcb_set_flag(lskb, SKCBF_RX_HDR);
+
+ if (cxgbi_skcb_tcp_seq(lskb) != csk->rcv_nxt) {
+ cxgb4i_log_info("tid 0x%x, CPL_ISCSI_HDR, bad seq got "
+ "0x%x, exp 0x%x\n",
+ csk->tid, cxgbi_skcb_tcp_seq(lskb),
+ csk->rcv_nxt);
+ goto abort_conn;
+ }
+
+ bhs = lskb->data;
+ hlen = ntohs(cpl->len);
+ dlen = ntohl(*(unsigned int *)(bhs + 4)) & 0xFFFFFF;
+
+ if ((hlen + dlen) != ISCSI_PDU_LEN(pdu_len_ddp) - 40) {
+ cxgb4i_log_info("tid 0x%x, CPL_ISCSI_HDR, pdu len "
+ "mismatch %u != %u + %u, seq 0x%x\n",
+ csk->tid,
+ ISCSI_PDU_LEN(pdu_len_ddp) - 40,
+ hlen, dlen, cxgbi_skcb_tcp_seq(skb));
+ goto abort_conn;
+ }
+
+ cxgbi_skcb_rx_pdulen(skb) = (hlen + dlen + 3) & (~0x3);
+ if (dlen)
+ cxgbi_skcb_rx_pdulen(skb) += csk->dcrc_len;
+ csk->rcv_nxt += cxgbi_skcb_rx_pdulen(skb);
+
+ cxgb4i_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 {
+ lskb = csk->skb_ulp_lhdr;
+ cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
+
+ cxgb4i_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)) {
+ cxgb4i_log_error("can't find connection for tid %u\n", tid);
+ goto rel_skb;
+ }
+
+ cxgb4i_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)) {
+ cxgb4i_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) {
+ cxgb4i_log_error("tid 0x%x, rcv RX_DATA_DDP w/o pdu header\n",
+ csk->tid);
+ goto abort_conn;
+ }
+
+ lskb = csk->skb_ulp_lhdr;
+ csk->skb_ulp_lhdr = NULL;
+
+ cxgbi_skcb_set_flag(lskb, SKCBF_RX_STATUS);
+ cxgbi_skcb_rx_ddigest(lskb) = ntohl(rpl->ulp_crc);
+
+ if (ntohs(rpl->len) != cxgbi_skcb_rx_pdulen(lskb)) {
+ cxgb4i_log_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)) {
+ cxgb4i_log_debug(1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad.\n",
+ csk, lskb, status);
+ cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
+ }
+ if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
+ cxgb4i_log_debug(1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad.\n",
+ csk, lskb, status);
+ cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
+ }
+ if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
+ cxgb4i_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)) {
+ cxgb4i_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);
+ }
+ cxgb4i_log_debug(1 << CXGBI_DBG_PDU_RX,
+ "csk 0x%p, lskb 0x%p, f 0x%lx.\n",
+ csk, lskb, cxgbi_skcb_flags(lskb));
+
+ 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))
+ cxgb4i_log_error("can't find connection for tid %u\n", tid);
+ else
+ 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)
+ cxgb4i_log_error("can't find conn. for tid %u\n", tid);
+
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p, tid 0x%x, status 0x%x.\n",
+ csk, tid, rpl->status);
+
+ if (rpl->status != CPL_ERR_NONE)
+ cxgb4i_log_error("csk 0x%p,%u, SET_TCB_RPL status %u.\n",
+ csk, tid, rpl->status);
+
+ __kfree_skb(skb);
+}
+
+static int alloc_cpls(struct cxgbi_sock *csk)
+{
+ csk->cpl_close = alloc_cpl(sizeof(struct cpl_close_con_req),
+ 0, GFP_NOIO);
+ if (!csk->cpl_close)
+ return -ENOMEM;
+
+ csk->cpl_abort_req = alloc_cpl(sizeof(struct cpl_abort_req),
+ 0, GFP_NOIO);
+ if (!csk->cpl_abort_req)
+ goto free_cpls;
+
+ csk->cpl_abort_rpl = alloc_cpl(sizeof(struct cpl_abort_rpl),
+ 0, GFP_NOIO);
+ 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;
+
+ cxgb4i_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 port_info *pi = netdev_priv(ndev);
+ struct sk_buff *skb = NULL;
+ unsigned int step;
+
+ cxgb4i_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);
+
+ csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
+ if (csk->atid < 0) {
+ cxgb4i_log_error("%s, NO atid available.\n", ndev->name);
+ return -EINVAL;
+ }
+ cxgbi_sock_set_flag(csk, CTPF_HAS_ATID);
+ cxgbi_sock_get(csk);
+
+ csk->l2t = cxgb4_l2t_get(lldi->l2t, csk->dst->neighbour, ndev, 0);
+ if (!csk->l2t) {
+ cxgb4i_log_error("%s, cannot alloc l2t.\n", ndev->name);
+ goto rel_resource;
+ }
+ cxgbi_sock_get(csk);
+
+ skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_NOIO);
+ if (!skb)
+ goto rel_resource;
+ skb->sk = (struct sock *)csk;
+ t4_set_arp_err_handler(skb, csk, cxgbi_sock_act_open_req_arp_failure);
+
+ if (!csk->mtu)
+ csk->mtu = dst_mtu(csk->dst);
+ cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
+ csk->tx_chan = cxgb4_port_chan(ndev);
+ /* SMT two entries per row */
+ csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
+ step = lldi->ntxq / lldi->nchan;
+ csk->txq_idx = cxgb4_port_idx(ndev) * step;
+ step = lldi->nrxq / lldi->nchan;
+ csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
+ csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
+ csk->wr_una_cred = 0;
+ cxgbi_sock_reset_wr_list(csk);
+ csk->err = 0;
+ cxgb4i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+ "csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
+ csk, pi->port_id, ndev->name, csk->tx_chan,
+ csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
+ csk->smac_idx);
+
+ cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
+ send_act_open_req(csk, skb, csk->l2t);
+ return 0;
+
+rel_resource:
+ if (skb)
+ __kfree_skb(skb);
+ return -EINVAL;
+}
+
+cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
+ [CPL_ACT_ESTABLISH] = do_act_establish,
+ [CPL_ACT_OPEN_RPL] = do_act_open_rpl,
+ [CPL_PEER_CLOSE] = do_peer_close,
+ [CPL_ABORT_REQ_RSS] = do_abort_req_rss,
+ [CPL_ABORT_RPL_RSS] = do_abort_rpl_rss,
+ [CPL_CLOSE_CON_RPL] = do_close_con_rpl,
+ [CPL_FW4_ACK] = do_fw4_ack,
+ [CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
+ [CPL_SET_TCB_RPL] = do_set_tcb_rpl,
+ [CPL_RX_DATA_DDP] = do_rx_data_ddp,
+};
+
+int cxgb4i_ofld_init(struct cxgbi_device *cdev)
+{
+ int rc;
+
+ if (cxgb4i_max_connect > CXGB4I_MAX_CONN)
+ cxgb4i_max_connect = CXGB4I_MAX_CONN;
+
+ rc = cxgbi_device_portmap_create(cdev, cxgb4i_sport_base,
+ cxgb4i_max_connect);
+ if (rc < 0)
+ return rc;
+
+ cdev->csk_release_offload_resources = release_offload_resources;
+ cdev->csk_push_tx_frames = push_tx_frames;
+ cdev->csk_send_abort_req = send_abort_req;
+ cdev->csk_send_close_req = send_close_req;
+ cdev->csk_send_rx_credits = send_rx_credits;
+ cdev->csk_alloc_cpls = alloc_cpls;
+ cdev->csk_init_act_open = init_act_open;
+
+ cxgb4i_log_info("cdev 0x%p, offload up, added.\n", cdev);
+ return 0;
+}
+
+/*
+ * functions to program the pagepod in h/w
+ */
+static inline void ulp_mem_io_set_hdr(struct ulp_mem_io *req,
+ unsigned int dlen, unsigned int pm_addr)
+{
+ struct ulptx_sgl *sgl;
+ unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) +
+ sizeof(struct ulptx_sgl), 16);
+
+ INIT_ULPTX_WR(req, wr_len, 0, 0);
+ req->cmd = htonl(ULPTX_CMD(ULP_TX_MEM_WRITE));
+ req->dlen = htonl(ULP_MEMIO_DATA_LEN(dlen >> 5));
+ req->lock_addr = htonl(ULP_MEMIO_ADDR(pm_addr >> 5));
+ req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16));
+ sgl = (struct ulptx_sgl *)(req + 1);
+ sgl->cmd_nsge = htonl(ULPTX_CMD(ULP_TX_SC_DSGL) | ULPTX_NSGE(1));
+ sgl->len0 = htonl(dlen);
+}
+
+static int ddp_ppod_write_sgl(struct cxgbi_device *cdev, unsigned int port_id,
+ struct cxgbi_pagepod_hdr *hdr, unsigned int idx,
+ unsigned int npods,
+ struct cxgbi_gather_list *gl,
+ unsigned int gl_pidx)
+{
+ struct cxgbi_ddp_info *ddp = cdev->ddp;
+ unsigned int dlen, pm_addr;
+ struct sk_buff *skb;
+ struct ulp_mem_io *req;
+ struct ulptx_sgl *sgl;
+ struct cxgbi_pagepod *ppod;
+ unsigned int i;
+
+ dlen = PPOD_SIZE * npods;
+ pm_addr = idx * PPOD_SIZE + ddp->llimit;
+
+ skb = alloc_cpl(sizeof(*req) + sizeof(*sgl), dlen, GFP_ATOMIC);
+ if (!skb) {
+ cxgb4i_log_error("cdev 0x%p, idx %u, npods %u, OOM\n",
+ cdev, idx, npods);
+ return -ENOMEM;
+ }
+ req = (struct ulp_mem_io *)skb->head;
+ set_queue(skb, CPL_PRIORITY_CONTROL, NULL);
+
+ ulp_mem_io_set_hdr(req, dlen, pm_addr);
+ sgl = (struct ulptx_sgl *)(req + 1);
+ ppod = (struct cxgbi_pagepod *)(sgl + 1);
+ sgl->addr0 = cpu_to_be64(virt_to_phys(ppod));
+
+ for (i = 0; i < npods; i++, ppod++, gl_pidx += PPOD_PAGES_MAX) {
+ if (!hdr && !gl)
+ cxgbi_ddp_ppod_clear(ppod);
+ else
+ cxgbi_ddp_ppod_set(ppod, hdr, gl, gl_pidx);
+ }
+
+ cxgb4_ofld_send(cdev->ports[port_id], skb);
+ return 0;
+}
+
+static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr,
+ unsigned int idx, unsigned int npods,
+ struct cxgbi_gather_list *gl)
+{
+ unsigned int i, cnt;
+ int err = 0;
+
+ for (i = 0; i < npods; i += cnt, idx += cnt) {
+ cnt = npods - i;
+ if (cnt > ULPMEM_DSGL_MAX_NPPODS)
+ cnt = ULPMEM_DSGL_MAX_NPPODS;
+ err = ddp_ppod_write_sgl(csk->cdev, csk->port_id, hdr,
+ idx, cnt, gl, 4 * i);
+ if (err < 0)
+ break;
+ }
+ return err;
+}
+
+static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag,
+ unsigned int idx, unsigned int npods)
+{
+ unsigned int i, cnt;
+ int err;
+
+ for (i = 0; i < npods; i += cnt, idx += cnt) {
+ cnt = npods - i;
+ if (cnt > ULPMEM_DSGL_MAX_NPPODS)
+ cnt = ULPMEM_DSGL_MAX_NPPODS;
+ err = ddp_ppod_write_sgl(chba->cdev, chba->port_id, NULL,
+ idx, cnt, NULL, 0);
+ if (err < 0)
+ break;
+ }
+}
+
+static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid,
+ int pg_idx, bool reply)
+{
+ struct sk_buff *skb;
+ struct cpl_set_tcb_field *req;
+ u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0;
+
+ if (!pg_idx)
+ return 0;
+
+ skb = alloc_cpl(sizeof(*req), 0, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ /* set up ulp submode and page size */
+ val = (val & 0x03) << 2;
+ val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI);
+
+ req = (struct cpl_set_tcb_field *)skb->head;
+ INIT_TP_WR(req, csk->tid);
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, csk->tid));
+ req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
+ req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW));
+ req->mask = cpu_to_be64(TCB_ULP_TYPE(TCB_ULP_TYPE_MASK));
+ req->val = cpu_to_be64(val);
+ set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
+
+ cxgb4i_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;
+ u64 val = (hcrc ? ULP_CRC_HEADER : 0) | (dcrc ? ULP_CRC_DATA : 0);
+
+ val = TCB_ULP_RAW(val);
+ val |= TCB_ULP_TYPE(ULP2_MODE_ISCSI);
+
+ skb = alloc_cpl(sizeof(*req), 0, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ csk->hcrc_len = (hcrc ? 4 : 0);
+ csk->dcrc_len = (dcrc ? 4 : 0);
+ /* set up ulp submode and page size */
+ req = (struct cpl_set_tcb_field *)skb->head;
+ INIT_TP_WR(req, tid);
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
+ req->reply_ctrl = htons(NO_REPLY(reply) | QUEUENO(csk->rss_qid));
+ req->word_cookie = htons(TCB_WORD(W_TCB_ULP_RAW));
+ req->mask = cpu_to_be64(TCB_ULP_RAW(TCB_ULP_RAW_MASK));
+ req->val = cpu_to_be64(val);
+ set_wr_txq(skb, CPL_PRIORITY_CONTROL, csk->port_id);
+
+ cxgb4i_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);
+ cxgb4i_log_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_free_gl_skb = NULL;
+ cdev->csk_ddp_alloc_gl_skb = NULL;
+ 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;
+
+ cxgb4i_log_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);
+ cxgb4i_log_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);
+ cxgb4i_log_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;
+
+ cxgb4i_log_info("%s", version);
+
+ cdev = cxgbi_device_register(sizeof(*lldi), lldi->nports);
+ if (!cdev) {
+ cxgb4i_log_info("t4 device 0x%p, register failed.\n", lldi);
+ return NULL;
+ }
+ cxgb4i_log_debug(1 << CXGBI_DBG_DEV,
+ "t4 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++)
+ cxgb4i_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;
+
+ rc = cxgbi_iscsi_init(cdev);
+ if (rc) {
+ cxgb4i_log_info("t4 0x%p iscsi init failed\n", cdev);
+ goto err_out;
+ }
+ rc = cxgb4i_ddp_init(cdev);
+ if (rc) {
+ cxgb4i_log_info("t4 0x%p ddp init failed\n", cdev);
+ goto err_out;
+ }
+ rc = cxgb4i_ofld_init(cdev);
+ if (rc) {
+ cxgb4i_log_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);
+ 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;
+ }
+ cxgb4i_log_info("cdev 0x%p, f 0x%x, open, err %d.\n",
+ cdev, cdev->flags, rc);
+ return cdev;
+
+err_out:
+ cxgbi_device_unregister(cdev);
+ return ERR_PTR(-ENOMEM);
+}
+
+#define RX_PULL_LEN 128
+static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
+ const struct pkt_gl *pgl)
+{
+ const struct cpl_act_establish *rpl;
+ struct sk_buff *skb;
+ unsigned int opc;
+ struct cxgbi_device *cdev = handle;
+
+ if (pgl == NULL) {
+ unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
+
+ skb = alloc_cpl(len, 0, GFP_ATOMIC);
+ if (!skb)
+ goto nomem;
+ skb_copy_to_linear_data(skb, &rsp[1], len);
+ } else {
+ if (unlikely(*(u8 *)rsp != *(u8 *)pgl->va)) {
+ cxgb4i_log_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;
+ cxgb4i_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 {
+ cxgb4i_log_error("No handler for opcode 0x%x\n", opc);
+ __kfree_skb(skb);
+ }
+ return 0;
+nomem:
+ cxgb4i_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:
+ cxgb4i_log_info("cdev 0x%p, UP.\n", cdev);
+ /* re-initialize */
+ break;
+ case CXGB4_STATE_START_RECOVERY:
+ cxgb4i_log_info("cdev 0x%p, RECOVERY.\n", cdev);
+ /* close all connections */
+ break;
+ case CXGB4_STATE_DOWN:
+ cxgb4i_log_info("cdev 0x%p, DOWN.\n", cdev);
+ break;
+ case CXGB4_STATE_DETACH:
+ cxgb4i_log_info("cdev 0x%p, DETACH.\n", cdev);
+ break;
+ default:
+ cxgb4i_log_info("cdev 0x%p, unknown state %d.\n", cdev, state);
+ break;
+ }
+ return 0;
+}
+
+static int __init cxgb4i_init_module(void)
+{
+ cxgbi_fill_scsi_host_template(&cxgb4i_host_template);
+ cxgbi_fill_iscsi_transport(&cxgb4i_iscsi_transport);
+ cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
+ return 0;
+}
+
+static void __exit cxgb4i_exit_module(void)
+{
+ cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
+ cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
+}
+
+module_init(cxgb4i_init_module);
+module_exit(cxgb4i_exit_module);
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.h b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.h
new file mode 100644
index 0000000..ae8fbb4
--- /dev/null
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.h
@@ -0,0 +1,42 @@
+/*
+ * cxgb4i.h: 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@...lsio.com)
+ * Written by: Rakesh Ranjan (rranjan@...lsio.com)
+ */
+
+#ifndef __CXGB4I_H__
+#define __CXGB4I_H__
+
+#include "../libcxgbi.h"
+
+#define CXGB4I_SCSI_HOST_QDEPTH 1024
+#define CXGB4I_MAX_CONN 16384
+#define CXGB4I_MAX_TARGET CXGB4I_MAX_CONN
+#define CXGB4I_MAX_LUN 0x1000
+
+/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
+#define CXGB4I_TX_HEADER_LEN \
+ (sizeof(struct fw_ofld_tx_data_wr) + sizeof(struct sge_opaque_hdr))
+
+typedef void (*cxgb4i_cplhandler_func)(struct cxgbi_device *, struct sk_buff *);
+
+struct cpl_rx_data_ddp {
+ union opcode_tid ot;
+ __be16 urg;
+ __be16 len;
+ __be32 seq;
+ union {
+ __be32 nxt_seq;
+ __be32 ddp_report;
+ };
+ __be32 ulp_crc;
+ __be32 ddpvld;
+};
+#endif /* __CXGB4I_H__ */
--
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