[PATCH 2/3] cxgb4i v5: iscsi driver
From: Karen Xie <[email protected]>
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 <[email protected]>
---
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 ([email protected])
+ * Rakesh Ranjan ([email protected])
+ */
+
+#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 ([email protected])
+ * Written by: Rakesh Ranjan ([email protected])
+ */
+
+#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__ */
On 08/09/2010 12:53 PM, [email protected] wrote:
> +
> +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;
> + }
For each LLD (cxgb3i and cxgb4i) could it get called more than once? I
mean if you had multiple cxgb3i HBAs could it get called once for each
or is it called just once time for all cxgb3i hbas? If more than once
the cxgbi_iscsi_init call to iscsi_register_transport would fail on the
second call, because the iscsi class would not allow you to register the
same transport twice.
Yes, you are right. I will fix it to make sure iscsi transport
registration happens only once.
Thanks,
Karen
-----Original Message-----
From: Mike Christie [mailto:[email protected]]
Sent: Wednesday, August 11, 2010 11:38 AM
To: [email protected]
Cc: Karen Xie; [email protected]; [email protected];
Rakesh Ranjan; [email protected]
Subject: Re: [PATCH 2/3] cxgb4i v5: iscsi driver
On 08/09/2010 12:53 PM, [email protected] wrote:
> +
> +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;
> + }
For each LLD (cxgb3i and cxgb4i) could it get called more than once? I
mean if you had multiple cxgb3i HBAs could it get called once for each
or is it called just once time for all cxgb3i hbas? If more than once
the cxgbi_iscsi_init call to iscsi_register_transport would fail on the
second call, because the iscsi class would not allow you to register the
same transport twice.