RDMA/cxgb4: Add driver for Chelsio T4 RNIC
Add an RDMA/iWARP driver for Chelsio T4 Ethernet adapters.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
new file mode 100644
index 0000000..07b068b
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -0,0 +1,2330 @@
+/*
+ * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+#include <linux/notifier.h>
+#include <linux/inetdevice.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+
+#include <net/neighbour.h>
+#include <net/netevent.h>
+#include <net/route.h>
+
+#include "iw_cxgb4.h"
+
+static char *states[] = {
+ "idle",
+ "listen",
+ "connecting",
+ "mpa_wait_req",
+ "mpa_req_sent",
+ "mpa_req_rcvd",
+ "mpa_rep_sent",
+ "fpdu_mode",
+ "aborting",
+ "closing",
+ "moribund",
+ "dead",
+ NULL,
+};
+
+static int enable_tcp_timestamps;
+module_param(enable_tcp_timestamps, int, 0644);
+MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
+
+static int enable_tcp_sack;
+module_param(enable_tcp_sack, int, 0644);
+MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
+
+static int enable_tcp_window_scaling = 1;
+module_param(enable_tcp_window_scaling, int, 0644);
+MODULE_PARM_DESC(enable_tcp_window_scaling,
+ "Enable tcp window scaling (default=1)");
+
+int c4iw_debug;
+module_param(c4iw_debug, int, 0644);
+MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
+
+static int peer2peer;
+module_param(peer2peer, int, 0644);
+MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
+
+static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
+module_param(p2p_type, int, 0644);
+MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
+ "1=RDMA_READ 0=RDMA_WRITE (default 1)");
+
+static int ep_timeout_secs = 60;
+module_param(ep_timeout_secs, int, 0644);
+MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
+ "in seconds (default=60)");
+
+static int mpa_rev = 1;
+module_param(mpa_rev, int, 0644);
+MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
+ "1 is spec compliant. (default=1)");
+
+static int markers_enabled;
+module_param(markers_enabled, int, 0644);
+MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
+
+static int crc_enabled = 1;
+module_param(crc_enabled, int, 0644);
+MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
+
+static int rcv_win = 256 * 1024;
+module_param(rcv_win, int, 0644);
+MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
+
+static int snd_win = 32 * 1024;
+module_param(snd_win, int, 0644);
+MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
+
+static void process_work(struct work_struct *work);
+static struct workqueue_struct *workq;
+static DECLARE_WORK(skb_work, process_work);
+
+static struct sk_buff_head rxq;
+static c4iw_handler_func work_handlers[NUM_CPL_CMDS];
+c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS];
+
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
+static void ep_timeout(unsigned long arg);
+static void connect_reply_upcall(struct c4iw_ep *ep, int status);
+
+static void start_ep_timer(struct c4iw_ep *ep)
+{
+ PDBG("%s ep %p\n", __func__, ep);
+ if (timer_pending(&ep->timer)) {
+ PDBG("%s stopped / restarted timer ep %p\n", __func__, ep);
+ del_timer_sync(&ep->timer);
+ } else
+ c4iw_get_ep(&ep->com);
+ ep->timer.expires = jiffies + ep_timeout_secs * HZ;
+ ep->timer.data = (unsigned long)ep;
+ ep->timer.function = ep_timeout;
+ add_timer(&ep->timer);
+}
+
+static void stop_ep_timer(struct c4iw_ep *ep)
+{
+ PDBG("%s ep %p\n", __func__, ep);
+ if (!timer_pending(&ep->timer)) {
+ printk(KERN_ERR "%s timer stopped when its not running! "
+ "ep %p state %u\n", __func__, ep, ep->com.state);
+ WARN_ON(1);
+ return;
+ }
+ del_timer_sync(&ep->timer);
+ c4iw_put_ep(&ep->com);
+}
+
+static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
+ struct l2t_entry *l2e)
+{
+ int error = 0;
+
+ if (c4iw_fatal_error(rdev)) {
+ kfree_skb(skb);
+ PDBG("%s - device in error state - dropping\n", __func__);
+ return -EIO;
+ }
+ error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
+ if (error < 0)
+ kfree_skb(skb);
+ return error;
+}
+
+int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
+{
+ int error = 0;
+
+ if (c4iw_fatal_error(rdev)) {
+ kfree_skb(skb);
+ PDBG("%s - device in error state - dropping\n", __func__);
+ return -EIO;
+ }
+ error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
+ if (error < 0)
+ kfree_skb(skb);
+ return error;
+}
+
+static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
+{
+ struct cpl_tid_release *req;
+
+ skb = get_skb(skb, sizeof *req, GFP_KERNEL);
+ if (!skb)
+ return;
+ req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
+ INIT_TP_WR(req, hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
+ c4iw_ofld_send(rdev, skb);
+ return;
+}
+
+static void set_emss(struct c4iw_ep *ep, u16 opt)
+{
+ ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40;
+ ep->mss = ep->emss;
+ if (GET_TCPOPT_TSTAMP(opt))
+ ep->emss -= 12;
+ if (ep->emss < 128)
+ ep->emss = 128;
+ PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt),
+ ep->mss, ep->emss);
+}
+
+static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
+{
+ unsigned long flags;
+ enum c4iw_ep_state state;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ state = epc->state;
+ spin_unlock_irqrestore(&epc->lock, flags);
+ return state;
+}
+
+static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
+{
+ epc->state = new;
+}
+
+static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
+ __state_set(epc, new);
+ spin_unlock_irqrestore(&epc->lock, flags);
+ return;
+}
+
+static void *alloc_ep(int size, gfp_t gfp)
+{
+ struct c4iw_ep_common *epc;
+
+ epc = kzalloc(size, gfp);
+ if (epc) {
+ kref_init(&epc->kref);
+ spin_lock_init(&epc->lock);
+ init_waitqueue_head(&epc->waitq);
+ }
+ PDBG("%s alloc ep %p\n", __func__, epc);
+ return epc;
+}
+
+void _c4iw_free_ep(struct kref *kref)
+{
+ struct c4iw_ep *ep;
+
+ ep = container_of(kref, struct c4iw_ep, com.kref);
+ PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
+ if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
+ cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ }
+ kfree(ep);
+}
+
+static void release_ep_resources(struct c4iw_ep *ep)
+{
+ set_bit(RELEASE_RESOURCES, &ep->com.flags);
+ c4iw_put_ep(&ep->com);
+}
+
+static void process_work(struct work_struct *work)
+{
+ struct sk_buff *skb = NULL;
+ struct c4iw_dev *dev;
+ struct cpl_act_establish *rpl = cplhdr(skb);
+ unsigned int opcode;
+ int ret;
+
+ while ((skb = skb_dequeue(&rxq))) {
+ rpl = cplhdr(skb);
+ dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
+ opcode = rpl->ot.opcode;
+
+ BUG_ON(!work_handlers[opcode]);
+ ret = work_handlers[opcode](dev, skb);
+ if (!ret)
+ kfree_skb(skb);
+ }
+}
+
+static int status2errno(int status)
+{
+ switch (status) {
+ case CPL_ERR_NONE:
+ return 0;
+ case CPL_ERR_CONN_RESET:
+ return -ECONNRESET;
+ 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;
+ }
+}
+
+/*
+ * Try and reuse skbs already allocated...
+ */
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
+{
+ if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
+ skb_trim(skb, 0);
+ skb_get(skb);
+ skb_reset_transport_header(skb);
+ } else {
+ skb = alloc_skb(len, gfp);
+ }
+ return skb;
+}
+
+static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip,
+ __be32 peer_ip, __be16 local_port,
+ __be16 peer_port, u8 tos)
+{
+ struct rtable *rt;
+ struct flowi fl = {
+ .oif = 0,
+ .nl_u = {
+ .ip4_u = {
+ .daddr = peer_ip,
+ .saddr = local_ip,
+ .tos = tos}
+ },
+ .proto = IPPROTO_TCP,
+ .uli_u = {
+ .ports = {
+ .sport = local_port,
+ .dport = peer_port}
+ }
+ };
+
+ if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0))
+ return NULL;
+ return rt;
+}
+
+static void arp_failure_discard(void *handle, struct sk_buff *skb)
+{
+ PDBG("%s c4iw_dev %p\n", __func__, handle);
+ kfree_skb(skb);
+}
+
+/*
+ * Handle an ARP failure for an active open.
+ */
+static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
+{
+ printk(KERN_ERR MOD "ARP failure duing connect\n");
+ kfree_skb(skb);
+}
+
+/*
+ * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
+ * and send it along.
+ */
+static void abort_arp_failure(void *handle, struct sk_buff *skb)
+{
+ struct c4iw_rdev *rdev = handle;
+ struct cpl_abort_req *req = cplhdr(skb);
+
+ PDBG("%s rdev %p\n", __func__, rdev);
+ req->cmd = CPL_ABORT_NO_RST;
+ c4iw_ofld_send(rdev, skb);
+}
+
+static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ unsigned int flowclen = 80;
+ struct fw_flowc_wr *flowc;
+ int i;
+
+ skb = get_skb(skb, flowclen, GFP_KERNEL);
+ flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
+
+ flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) |
+ FW_FLOWC_WR_NPARAMS(8));
+ flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen,
+ 16)) | FW_WR_FLOWID(ep->hwtid));
+
+ flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
+ flowc->mnemval[0].val = cpu_to_be32(0);
+ flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
+ flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
+ flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
+ flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
+ flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
+ flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
+ flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
+ flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
+ flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
+ flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
+ flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
+ flowc->mnemval[6].val = cpu_to_be32(snd_win);
+ flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
+ flowc->mnemval[7].val = cpu_to_be32(ep->emss);
+ /* Pad WR to 16 byte boundary */
+ 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_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ c4iw_ofld_send(&ep->com.dev->rdev, skb);
+}
+
+static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
+{
+ struct cpl_close_con_req *req;
+ struct sk_buff *skb;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ skb = get_skb(NULL, wrlen, gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ INIT_TP_WR(req, ep->hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
+ ep->hwtid));
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ struct cpl_abort_req *req;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ skb = get_skb(skb, wrlen, gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
+ req = (struct cpl_abort_req *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ INIT_TP_WR(req, ep->hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
+ req->cmd = CPL_ABORT_SEND_RST;
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int send_connect(struct c4iw_ep *ep)
+{
+ struct cpl_act_open_req *req;
+ struct sk_buff *skb;
+ u64 opt0;
+ u32 opt2;
+ unsigned int mtu_idx;
+ int wscale;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
+
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->txq_idx);
+
+ cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
+ wscale = compute_wscale(rcv_win);
+ opt0 = KEEP_ALIVE(1) |
+ WND_SCALE(wscale) |
+ MSS_IDX(mtu_idx) |
+ L2T_IDX(ep->l2t->idx) |
+ TX_CHAN(ep->tx_chan) |
+ SMAC_SEL(ep->smac_idx) |
+ DSCP(ep->tos) |
+ RCV_BUFSIZ(rcv_win>>10);
+ opt2 = RX_CHANNEL(0) |
+ RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
+ if (enable_tcp_timestamps)
+ opt2 |= TSTAMPS_EN(1);
+ if (enable_tcp_sack)
+ opt2 |= SACK_EN(1);
+ if (wscale && enable_tcp_window_scaling)
+ opt2 |= WND_SCALE_EN(1);
+ t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure);
+
+ req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
+ INIT_TP_WR(req, 0);
+ OPCODE_TID(req) = cpu_to_be32(
+ MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid)));
+ req->local_port = ep->com.local_addr.sin_port;
+ req->peer_port = ep->com.remote_addr.sin_port;
+ req->local_ip = ep->com.local_addr.sin_addr.s_addr;
+ req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
+ req->opt0 = cpu_to_be64(opt0);
+ req->params = 0;
+ req->opt2 = cpu_to_be32(opt2);
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ int mpalen, wrlen;
+ struct fw_ofld_tx_data_wr *req;
+ struct mpa_message *mpa;
+
+ PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
+
+ BUG_ON(skb_cloned(skb));
+
+ mpalen = sizeof(*mpa) + ep->plen;
+ wrlen = roundup(mpalen + sizeof *req, 16);
+ skb = get_skb(skb, wrlen, GFP_KERNEL);
+ if (!skb) {
+ connect_reply_upcall(ep, -ENOMEM);
+ return;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ req->op_to_immdlen = cpu_to_be32(
+ FW_WR_OP(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL(1) |
+ FW_WR_IMMDLEN(mpalen));
+ req->flowid_len16 = cpu_to_be32(
+ FW_WR_FLOWID(ep->hwtid) |
+ FW_WR_LEN16(wrlen >> 4));
+ req->plen = cpu_to_be32(mpalen);
+ req->tunnel_to_proxy = cpu_to_be32(
+ FW_OFLD_TX_DATA_WR_FLUSH(1) |
+ FW_OFLD_TX_DATA_WR_SHOVE(1));
+
+ mpa = (struct mpa_message *)(req + 1);
+ memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
+ mpa->flags = (crc_enabled ? MPA_CRC : 0) |
+ (markers_enabled ? MPA_MARKERS : 0);
+ mpa->private_data_size = htons(ep->plen);
+ mpa->revision = mpa_rev;
+
+ if (ep->plen)
+ memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
+
+ /*
+ * Reference the mpa skb. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function fw4_ack() will deref it.
+ */
+ skb_get(skb);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+ start_ep_timer(ep);
+ state_set(&ep->com, MPA_REQ_SENT);
+ ep->mpa_attr.initiator = 1;
+ return;
+}
+
+static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen, wrlen;
+ struct fw_ofld_tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
+
+ mpalen = sizeof(*mpa) + plen;
+ wrlen = roundup(mpalen + sizeof *req, 16);
+
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ req->op_to_immdlen = cpu_to_be32(
+ FW_WR_OP(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL(1) |
+ FW_WR_IMMDLEN(mpalen));
+ req->flowid_len16 = cpu_to_be32(
+ FW_WR_FLOWID(ep->hwtid) |
+ FW_WR_LEN16(wrlen >> 4));
+ req->plen = cpu_to_be32(mpalen);
+ req->tunnel_to_proxy = cpu_to_be32(
+ FW_OFLD_TX_DATA_WR_FLUSH(1) |
+ FW_OFLD_TX_DATA_WR_SHOVE(1));
+
+ mpa = (struct mpa_message *)(req + 1);
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+ mpa->flags = MPA_REJECT;
+ mpa->revision = mpa_rev;
+ mpa->private_data_size = htons(plen);
+ if (plen)
+ memcpy(mpa->private_data, pdata, plen);
+
+ /*
+ * Reference the mpa skb again. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function fw4_ack() will deref it.
+ */
+ skb_get(skb);
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen, wrlen;
+ struct fw_ofld_tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
+
+ mpalen = sizeof(*mpa) + plen;
+ wrlen = roundup(mpalen + sizeof *req, 16);
+
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ req->op_to_immdlen = cpu_to_be32(
+ FW_WR_OP(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL(1) |
+ FW_WR_IMMDLEN(mpalen));
+ req->flowid_len16 = cpu_to_be32(
+ FW_WR_FLOWID(ep->hwtid) |
+ FW_WR_LEN16(wrlen >> 4));
+ req->plen = cpu_to_be32(mpalen);
+ req->tunnel_to_proxy = cpu_to_be32(
+ FW_OFLD_TX_DATA_WR_FLUSH(1) |
+ FW_OFLD_TX_DATA_WR_SHOVE(1));
+
+ mpa = (struct mpa_message *)(req + 1);
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+ mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
+ (markers_enabled ? MPA_MARKERS : 0);
+ mpa->revision = mpa_rev;
+ mpa->private_data_size = htons(plen);
+ if (plen)
+ memcpy(mpa->private_data, pdata, plen);
+
+ /*
+ * Reference the mpa skb. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function fw4_ack() will deref it.
+ */
+ skb_get(skb);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ ep->mpa_skb = skb;
+ state_set(&ep->com, MPA_REP_SENT);
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_act_establish *req = cplhdr(skb);
+ unsigned int tid = GET_TID(req);
+ unsigned int atid = GET_TID_TID(ntohl(req->tos_atid));
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+ ep = lookup_atid(t, atid);
+
+ PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
+ be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
+
+ dst_confirm(ep->dst);
+
+ /* setup the hwtid for this connection */
+ ep->hwtid = tid;
+ cxgb4_insert_tid(t, ep, tid);
+
+ ep->snd_seq = be32_to_cpu(req->snd_isn);
+ ep->rcv_seq = be32_to_cpu(req->rcv_isn);
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ /* dealloc the atid */
+ cxgb4_free_atid(t, atid);
+
+ /* start MPA negotiation */
+ send_flowc(ep, NULL);
+ send_mpa_req(ep, skb);
+
+ return 0;
+}
+
+static void close_complete_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CLOSE;
+ if (ep->com.cm_id) {
+ PDBG("close complete delivered ep %p cm_id %p tid %u\n",
+ ep, ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ }
+}
+
+static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ close_complete_upcall(ep);
+ state_set(&ep->com, ABORTING);
+ return send_abort(ep, skb, gfp);
+}
+
+static void peer_close_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_DISCONNECT;
+ if (ep->com.cm_id) {
+ PDBG("peer close delivered ep %p cm_id %p tid %u\n",
+ ep, ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+}
+
+static void peer_abort_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CLOSE;
+ event.status = -ECONNRESET;
+ if (ep->com.cm_id) {
+ PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
+ ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ }
+}
+
+static void connect_reply_upcall(struct c4iw_ep *ep, int status)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CONNECT_REPLY;
+ event.status = status;
+ event.local_addr = ep->com.local_addr;
+ event.remote_addr = ep->com.remote_addr;
+
+ if ((status == 0) || (status == -ECONNREFUSED)) {
+ event.private_data_len = ep->plen;
+ event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
+ }
+ if (ep->com.cm_id) {
+ PDBG("%s ep %p tid %u status %d\n", __func__, ep,
+ ep->hwtid, status);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+ if (status < 0) {
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ }
+}
+
+static void connect_request_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CONNECT_REQUEST;
+ event.local_addr = ep->com.local_addr;
+ event.remote_addr = ep->com.remote_addr;
+ event.private_data_len = ep->plen;
+ event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
+ event.provider_data = ep;
+ if (state_read(&ep->parent_ep->com) != DEAD) {
+ c4iw_get_ep(&ep->com);
+ ep->parent_ep->com.cm_id->event_handler(
+ ep->parent_ep->com.cm_id,
+ &event);
+ }
+ c4iw_put_ep(&ep->parent_ep->com);
+ ep->parent_ep = NULL;
+}
+
+static void established_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_ESTABLISHED;
+ if (ep->com.cm_id) {
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+}
+
+static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
+{
+ struct cpl_rx_data_ack *req;
+ struct sk_buff *skb;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
+ return 0;
+ }
+
+ req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ INIT_TP_WR(req, ep->hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
+ ep->hwtid));
+ req->credit_dack = cpu_to_be32(credits);
+ set_wr_txq(skb, CPL_PRIORITY_ACK, ep->txq_idx);
+ c4iw_ofld_send(&ep->com.dev->rdev, skb);
+ return credits;
+}
+
+static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ u16 plen;
+ struct c4iw_qp_attributes attrs;
+ enum c4iw_qp_attr_mask mask;
+ int err;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ /*
+ * Stop mpa timer. If it expired, then the state has
+ * changed and we bail since ep_timeout already aborted
+ * the connection.
+ */
+ stop_ep_timer(ep);
+ if (state_read(&ep->com) != MPA_REQ_SENT)
+ return;
+
+ /*
+ * If we get more than the supported amount of private data
+ * then we must fail this connection.
+ */
+ if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ /*
+ * copy the new data into our accumulation buffer.
+ */
+ skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+ skb->len);
+ ep->mpa_pkt_len += skb->len;
+
+ /*
+ * if we don't even have the mpa message, then bail.
+ */
+ if (ep->mpa_pkt_len < sizeof(*mpa))
+ return;
+ mpa = (struct mpa_message *) ep->mpa_pkt;
+
+ /* Validate MPA header. */
+ if (mpa->revision != mpa_rev) {
+ err = -EPROTO;
+ goto err;
+ }
+ if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ plen = ntohs(mpa->private_data_size);
+
+ /*
+ * Fail if there's too much private data.
+ */
+ if (plen > MPA_MAX_PRIVATE_DATA) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ /*
+ * If plen does not account for pkt size
+ */
+ if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ ep->plen = (u8) plen;
+
+ /*
+ * If we don't have all the pdata yet, then bail.
+ * We'll continue process when more data arrives.
+ */
+ if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+ return;
+
+ if (mpa->flags & MPA_REJECT) {
+ err = -ECONNREFUSED;
+ goto err;
+ }
+
+ /*
+ * If we get here we have accumulated the entire mpa
+ * start reply message including private data. And
+ * the MPA header is valid.
+ */
+ state_set(&ep->com, FPDU_MODE);
+ ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+ ep->mpa_attr.recv_marker_enabled = markers_enabled;
+ ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+ ep->mpa_attr.version = mpa_rev;
+ ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
+ FW_RI_INIT_P2PTYPE_DISABLED;
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d\n", __func__,
+ ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
+
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ird;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = C4IW_QP_STATE_RTS;
+
+ mask = C4IW_QP_ATTR_NEXT_STATE |
+ C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
+ C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
+
+ /* bind QP and TID with INIT_WR */
+ err = c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (err)
+ goto err;
+ goto out;
+err:
+ abort_connection(ep, skb, GFP_KERNEL);
+out:
+ connect_reply_upcall(ep, err);
+ return;
+}
+
+static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ u16 plen;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ if (state_read(&ep->com) != MPA_REQ_WAIT)
+ return;
+
+ /*
+ * If we get more than the supported amount of private data
+ * then we must fail this connection.
+ */
+ if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+ stop_ep_timer(ep);
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
+
+ /*
+ * Copy the new data into our accumulation buffer.
+ */
+ skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+ skb->len);
+ ep->mpa_pkt_len += skb->len;
+
+ /*
+ * If we don't even have the mpa message, then bail.
+ * We'll continue process when more data arrives.
+ */
+ if (ep->mpa_pkt_len < sizeof(*mpa))
+ return;
+
+ PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
+ stop_ep_timer(ep);
+ mpa = (struct mpa_message *) ep->mpa_pkt;
+
+ /*
+ * Validate MPA Header.
+ */
+ if (mpa->revision != mpa_rev) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ plen = ntohs(mpa->private_data_size);
+
+ /*
+ * Fail if there's too much private data.
+ */
+ if (plen > MPA_MAX_PRIVATE_DATA) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ /*
+ * If plen does not account for pkt size
+ */
+ if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+ ep->plen = (u8) plen;
+
+ /*
+ * If we don't have all the pdata yet, then bail.
+ */
+ if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+ return;
+
+ /*
+ * If we get here we have accumulated the entire mpa
+ * start reply message including private data.
+ */
+ ep->mpa_attr.initiator = 0;
+ ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+ ep->mpa_attr.recv_marker_enabled = markers_enabled;
+ ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+ ep->mpa_attr.version = mpa_rev;
+ ep->mpa_attr.p2p_type = peer2peer ? p2p_type :
+ FW_RI_INIT_P2PTYPE_DISABLED;
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
+ ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
+ ep->mpa_attr.p2p_type);
+
+ state_set(&ep->com, MPA_REQ_RCVD);
+
+ /* drive upcall */
+ connect_request_upcall(ep);
+ return;
+}
+
+static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_rx_data *hdr = cplhdr(skb);
+ unsigned int dlen = ntohs(hdr->len);
+ unsigned int tid = GET_TID(hdr);
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
+ skb_pull(skb, sizeof(*hdr));
+ skb_trim(skb, dlen);
+
+ ep->rcv_seq += dlen;
+ BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
+
+ /* update RX credits */
+ update_rx_credits(ep, dlen);
+
+ switch (state_read(&ep->com)) {
+ case MPA_REQ_SENT:
+ process_mpa_reply(ep, skb);
+ break;
+ case MPA_REQ_WAIT:
+ process_mpa_request(ep, skb);
+ break;
+ case MPA_REP_SENT:
+ break;
+ default:
+ printk(KERN_ERR MOD "%s Unexpected streaming data."
+ " ep %p state %d tid %u\n",
+ __func__, ep, state_read(&ep->com), ep->hwtid);
+
+ /*
+ * The ep will timeout and inform the ULP of the failure.
+ * See ep_timeout().
+ */
+ break;
+ }
+ return 0;
+}
+
+static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
+ unsigned long flags;
+ int release = 0;
+ unsigned int tid = GET_TID(rpl);
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ BUG_ON(!ep);
+ spin_lock_irqsave(&ep->com.lock, flags);
+ switch (ep->com.state) {
+ case ABORTING:
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ break;
+ default:
+ printk(KERN_ERR "%s ep %p state %d\n",
+ __func__, ep, ep->com.state);
+ break;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+/*
+ * Return whether a failed active open has allocated a TID
+ */
+static inline int act_open_has_tid(int status)
+{
+ return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
+ status != CPL_ERR_ARP_MISS;
+}
+
+static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_act_open_rpl *rpl = cplhdr(skb);
+ unsigned int atid = GET_TID_TID(GET_AOPEN_ATID(
+ ntohl(rpl->atid_status)));
+ struct tid_info *t = dev->rdev.lldi.tids;
+ int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status));
+
+ ep = lookup_atid(t, atid);
+
+ PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
+ status, status2errno(status));
+
+ if (status == CPL_ERR_RTX_NEG_ADVICE) {
+ printk(KERN_WARNING MOD "Connection problems for atid %u\n",
+ atid);
+ return 0;
+ }
+
+ connect_reply_upcall(ep, status2errno(status));
+ state_set(&ep->com, DEAD);
+
+ if (status && act_open_has_tid(status))
+ cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
+
+ cxgb4_free_atid(t, atid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ c4iw_put_ep(&ep->com);
+
+ return 0;
+}
+
+static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_pass_open_rpl *rpl = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int stid = GET_TID(rpl);
+ struct c4iw_listen_ep *ep = lookup_stid(t, stid);
+
+ if (!ep) {
+ printk(KERN_ERR MOD "stid %d lookup failure!\n", stid);
+ return 0;
+ }
+ PDBG("%s ep %p status %d error %d\n", __func__, ep,
+ rpl->status, status2errno(rpl->status));
+ ep->com.rpl_err = status2errno(rpl->status);
+ ep->com.rpl_done = 1;
+ wake_up(&ep->com.waitq);
+
+ return 0;
+}
+
+static int listen_stop(struct c4iw_listen_ep *ep)
+{
+ struct sk_buff *skb;
+ struct cpl_close_listsvr_req *req;
+
+ PDBG("%s ep %p\n", __func__, ep);
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
+ return -ENOMEM;
+ }
+ req = (struct cpl_close_listsvr_req *) skb_put(skb, sizeof(*req));
+ INIT_TP_WR(req, 0);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
+ ep->stid));
+ req->reply_ctrl = cpu_to_be16(
+ QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0]));
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
+ return c4iw_ofld_send(&ep->com.dev->rdev, skb);
+}
+
+static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int stid = GET_TID(rpl);
+ struct c4iw_listen_ep *ep = lookup_stid(t, stid);
+
+ PDBG("%s ep %p\n", __func__, ep);
+ ep->com.rpl_err = status2errno(rpl->status);
+ ep->com.rpl_done = 1;
+ wake_up(&ep->com.waitq);
+ return 0;
+}
+
+static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb,
+ struct cpl_pass_accept_req *req)
+{
+ struct cpl_pass_accept_rpl *rpl;
+ unsigned int mtu_idx;
+ u64 opt0;
+ u32 opt2;
+ int wscale;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ BUG_ON(skb_cloned(skb));
+ skb_trim(skb, sizeof(*rpl));
+ skb_get(skb);
+ cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
+ wscale = compute_wscale(rcv_win);
+ opt0 = KEEP_ALIVE(1) |
+ WND_SCALE(wscale) |
+ MSS_IDX(mtu_idx) |
+ L2T_IDX(ep->l2t->idx) |
+ TX_CHAN(ep->tx_chan) |
+ SMAC_SEL(ep->smac_idx) |
+ DSCP(ep->tos) |
+ RCV_BUFSIZ(rcv_win>>10);
+ opt2 = RX_CHANNEL(0) |
+ RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
+
+ if (enable_tcp_timestamps && req->tcpopt.tstamp)
+ opt2 |= TSTAMPS_EN(1);
+ if (enable_tcp_sack && req->tcpopt.sack)
+ opt2 |= SACK_EN(1);
+ if (wscale && enable_tcp_window_scaling)
+ opt2 |= WND_SCALE_EN(1);
+
+ rpl = cplhdr(skb);
+ INIT_TP_WR(rpl, ep->hwtid);
+ OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
+ ep->hwtid));
+ rpl->opt0 = cpu_to_be64(opt0);
+ rpl->opt2 = cpu_to_be32(opt2);
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->txq_idx);
+ c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+
+ return;
+}
+
+static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip,
+ struct sk_buff *skb)
+{
+ PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid,
+ peer_ip);
+ BUG_ON(skb_cloned(skb));
+ skb_trim(skb, sizeof(struct cpl_tid_release));
+ skb_get(skb);
+ release_tid(&dev->rdev, hwtid, skb);
+ return;
+}
+
+static void get_4tuple(struct cpl_pass_accept_req *req,
+ __be32 *local_ip, __be32 *peer_ip,
+ __be16 *local_port, __be16 *peer_port)
+{
+ int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len));
+ int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len));
+ struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
+ struct tcphdr *tcp = (struct tcphdr *)
+ ((u8 *)(req + 1) + eth_len + ip_len);
+
+ PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
+ ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
+ ntohs(tcp->dest));
+
+ *peer_ip = ip->saddr;
+ *local_ip = ip->daddr;
+ *peer_port = tcp->source;
+ *local_port = tcp->dest;
+
+ return;
+}
+
+static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *child_ep, *parent_ep;
+ struct cpl_pass_accept_req *req = cplhdr(skb);
+ unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid));
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int hwtid = GET_TID(req);
+ struct dst_entry *dst;
+ struct l2t_entry *l2t;
+ struct rtable *rt;
+ __be32 local_ip, peer_ip;
+ __be16 local_port, peer_port;
+ struct net_device *pdev;
+ u32 tx_chan, smac_idx;
+ u16 rss_qid;
+ u32 mtu;
+ int step;
+ int txq_idx;
+
+ parent_ep = lookup_stid(t, stid);
+ PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
+
+ get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port);
+
+ if (state_read(&parent_ep->com) != LISTEN) {
+ printk(KERN_ERR "%s - listening ep not in LISTEN\n",
+ __func__);
+ goto reject;
+ }
+
+ /* Find output route */
+ rt = find_route(dev, local_ip, peer_ip, local_port, peer_port,
+ GET_POPEN_TOS(ntohl(req->tos_stid)));
+ if (!rt) {
+ printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
+ __func__);
+ goto reject;
+ }
+ dst = &rt->u.dst;
+ if (dst->neighbour->dev->flags & IFF_LOOPBACK) {
+ pdev = ip_dev_find(&init_net, peer_ip);
+ BUG_ON(!pdev);
+ l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
+ pdev, 0);
+ mtu = pdev->mtu;
+ tx_chan = cxgb4_port_chan(pdev);
+ smac_idx = tx_chan << 1;
+ step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
+ txq_idx = cxgb4_port_idx(pdev) * step;
+ step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
+ rss_qid = dev->rdev.lldi.rxq_ids[cxgb4_port_idx(pdev) * step];
+ dev_put(pdev);
+ } else {
+ l2t = cxgb4_l2t_get(dev->rdev.lldi.l2t, dst->neighbour,
+ dst->neighbour->dev, 0);
+ mtu = dst_mtu(dst);
+ tx_chan = cxgb4_port_chan(dst->neighbour->dev);
+ smac_idx = tx_chan << 1;
+ step = dev->rdev.lldi.ntxq / dev->rdev.lldi.nchan;
+ txq_idx = cxgb4_port_idx(dst->neighbour->dev) * step;
+ step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
+ rss_qid = dev->rdev.lldi.rxq_ids[
+ cxgb4_port_idx(dst->neighbour->dev) * step];
+ }
+ if (!l2t) {
+ printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
+ __func__);
+ dst_release(dst);
+ goto reject;
+ }
+
+ child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
+ if (!child_ep) {
+ printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
+ __func__);
+ cxgb4_l2t_release(l2t);
+ dst_release(dst);
+ goto reject;
+ }
+ state_set(&child_ep->com, CONNECTING);
+ child_ep->com.dev = dev;
+ child_ep->com.cm_id = NULL;
+ child_ep->com.local_addr.sin_family = PF_INET;
+ child_ep->com.local_addr.sin_port = local_port;
+ child_ep->com.local_addr.sin_addr.s_addr = local_ip;
+ child_ep->com.remote_addr.sin_family = PF_INET;
+ child_ep->com.remote_addr.sin_port = peer_port;
+ child_ep->com.remote_addr.sin_addr.s_addr = peer_ip;
+ c4iw_get_ep(&parent_ep->com);
+ child_ep->parent_ep = parent_ep;
+ child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid));
+ child_ep->l2t = l2t;
+ child_ep->dst = dst;
+ child_ep->hwtid = hwtid;
+ child_ep->tx_chan = tx_chan;
+ child_ep->smac_idx = smac_idx;
+ child_ep->rss_qid = rss_qid;
+ child_ep->mtu = mtu;
+ child_ep->txq_idx = txq_idx;
+
+ PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
+ tx_chan, smac_idx, rss_qid);
+
+ init_timer(&child_ep->timer);
+ cxgb4_insert_tid(t, child_ep, hwtid);
+ accept_cr(child_ep, peer_ip, skb, req);
+ goto out;
+reject:
+ reject_cr(dev, hwtid, peer_ip, skb);
+out:
+ return 0;
+}
+
+static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_pass_establish *req = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(req);
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ ep->snd_seq = be32_to_cpu(req->snd_isn);
+ ep->rcv_seq = be32_to_cpu(req->rcv_isn);
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ dst_confirm(ep->dst);
+ state_set(&ep->com, MPA_REQ_WAIT);
+ start_ep_timer(ep);
+ send_flowc(ep, skb);
+
+ return 0;
+}
+
+static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_peer_close *hdr = cplhdr(skb);
+ struct c4iw_ep *ep;
+ struct c4iw_qp_attributes attrs;
+ unsigned long flags;
+ int disconnect = 1;
+ int release = 0;
+ int closing = 0;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(hdr);
+ int start_timer = 0;
+ int stop_timer = 0;
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ dst_confirm(ep->dst);
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ switch (ep->com.state) {
+ case MPA_REQ_WAIT:
+ __state_set(&ep->com, CLOSING);
+ break;
+ case MPA_REQ_SENT:
+ __state_set(&ep->com, CLOSING);
+ connect_reply_upcall(ep, -ECONNRESET);
+ break;
+ case MPA_REQ_RCVD:
+
+ /*
+ * We're gonna mark this puppy DEAD, but keep
+ * the reference on it until the ULP accepts or
+ * rejects the CR. Also wake up anyone waiting
+ * in rdma connection migration (see c4iw_accept_cr()).
+ */
+ __state_set(&ep->com, CLOSING);
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
+ wake_up(&ep->com.waitq);
+ break;
+ case MPA_REP_SENT:
+ __state_set(&ep->com, CLOSING);
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
+ wake_up(&ep->com.waitq);
+ break;
+ case FPDU_MODE:
+ start_timer = 1;
+ __state_set(&ep->com, CLOSING);
+ closing = 1;
+ peer_close_upcall(ep);
+ break;
+ case ABORTING:
+ disconnect = 0;
+ break;
+ case CLOSING:
+ __state_set(&ep->com, MORIBUND);
+ disconnect = 0;
+ break;
+ case MORIBUND:
+ stop_timer = 1;
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = C4IW_QP_STATE_IDLE;
+ c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ }
+ close_complete_upcall(ep);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ disconnect = 0;
+ break;
+ case DEAD:
+ disconnect = 0;
+ break;
+ default:
+ BUG_ON(1);
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (closing) {
+ attrs.next_state = C4IW_QP_STATE_CLOSING;
+ c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ }
+ if (start_timer)
+ start_ep_timer(ep);
+ if (stop_timer)
+ stop_ep_timer(ep);
+ if (disconnect)
+ c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+/*
+ * Returns whether an ABORT_REQ_RSS message is a negative advice.
+ */
+static int is_neg_adv_abort(unsigned int status)
+{
+ return status == CPL_ERR_RTX_NEG_ADVICE ||
+ status == CPL_ERR_PERSIST_NEG_ADVICE;
+}
+
+static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct c4iw_ep *ep;
+ struct cpl_abort_rpl *rpl;
+ struct sk_buff *rpl_skb;
+ struct c4iw_qp_attributes attrs;
+ int ret;
+ int release = 0;
+ unsigned long flags;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(req);
+ int stop_timer = 0;
+
+ ep = lookup_tid(t, tid);
+ if (is_neg_adv_abort(req->status)) {
+ PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
+ ep->hwtid);
+ return 0;
+ }
+ spin_lock_irqsave(&ep->com.lock, flags);
+ PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
+ ep->com.state);
+ switch (ep->com.state) {
+ case CONNECTING:
+ break;
+ case MPA_REQ_WAIT:
+ stop_timer = 1;
+ break;
+ case MPA_REQ_SENT:
+ stop_timer = 1;
+ connect_reply_upcall(ep, -ECONNRESET);
+ break;
+ case MPA_REP_SENT:
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p\n", ep);
+ wake_up(&ep->com.waitq);
+ break;
+ case MPA_REQ_RCVD:
+
+ /*
+ * We're gonna mark this puppy DEAD, but keep
+ * the reference on it until the ULP accepts or
+ * rejects the CR. Also wake up anyone waiting
+ * in rdma connection migration (see c4iw_accept_cr()).
+ */
+ ep->com.rpl_done = 1;
+ ep->com.rpl_err = -ECONNRESET;
+ PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
+ wake_up(&ep->com.waitq);
+ break;
+ case MORIBUND:
+ case CLOSING:
+ stop_timer = 1;
+ /*FALLTHROUGH*/
+ case FPDU_MODE:
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = C4IW_QP_STATE_ERROR;
+ ret = c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ if (ret)
+ printk(KERN_ERR MOD
+ "%s - qp <- error failed!\n",
+ __func__);
+ }
+ peer_abort_upcall(ep);
+ break;
+ case ABORTING:
+ break;
+ case DEAD:
+ PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ return 0;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ dst_confirm(ep->dst);
+ if (ep->com.state != ABORTING) {
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+
+ rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
+ if (!rpl_skb) {
+ printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
+ __func__);
+ release = 1;
+ goto out;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
+ INIT_TP_WR(rpl, ep->hwtid);
+ OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
+ rpl->cmd = CPL_ABORT_NO_RST;
+ c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
+out:
+ if (stop_timer)
+ stop_ep_timer(ep);
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct c4iw_qp_attributes attrs;
+ struct cpl_close_con_rpl *rpl = cplhdr(skb);
+ unsigned long flags;
+ int release = 0;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(rpl);
+ int stop_timer = 0;
+
+ ep = lookup_tid(t, tid);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ BUG_ON(!ep);
+
+ /* The cm_id may be null if we failed to connect */
+ spin_lock_irqsave(&ep->com.lock, flags);
+ switch (ep->com.state) {
+ case CLOSING:
+ __state_set(&ep->com, MORIBUND);
+ break;
+ case MORIBUND:
+ stop_timer = 1;
+ if ((ep->com.cm_id) && (ep->com.qp)) {
+ attrs.next_state = C4IW_QP_STATE_IDLE;
+ c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ }
+ close_complete_upcall(ep);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ break;
+ case ABORTING:
+ case DEAD:
+ break;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (stop_timer)
+ stop_ep_timer(ep);
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_rdma_terminate *term = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(term);
+
+ ep = lookup_tid(t, tid);
+
+ if (state_read(&ep->com) != FPDU_MODE)
+ return 0;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ skb_pull(skb, sizeof *term);
+ PDBG("%s saving %d bytes of term msg\n", __func__, skb->len);
+ skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
+ skb->len);
+ ep->com.qp->attr.terminate_msg_len = skb->len;
+ ep->com.qp->attr.is_terminate_local = 0;
+ return 0;
+}
+
+/*
+ * Upcall from the adapter indicating data has been transmitted.
+ * For us its just the single MPA request or reply. We can now free
+ * the skb holding the mpa message.
+ */
+static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_fw4_ack *hdr = cplhdr(skb);
+ u8 credits = hdr->credits;
+ unsigned int tid = GET_TID(hdr);
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
+ if (credits == 0) {
+ PDBG(KERN_ERR "%s 0 credit ack ep %p tid %u state %u\n",
+ __func__, ep, ep->hwtid, state_read(&ep->com));
+ return 0;
+ }
+
+ dst_confirm(ep->dst);
+ if (ep->mpa_skb) {
+ PDBG("%s last streaming msg ack ep %p tid %u state %u "
+ "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
+ state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
+ kfree_skb(ep->mpa_skb);
+ ep->mpa_skb = NULL;
+ }
+ return 0;
+}
+
+static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_fw6_msg *rpl = cplhdr(skb);
+ struct c4iw_wr_wait *wr_waitp;
+ int ret;
+
+ PDBG("%s type %u\n", __func__, rpl->type);
+
+ switch (rpl->type) {
+ case 1:
+ ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
+ wr_waitp = (__force struct c4iw_wr_wait *)rpl->data[1];
+ PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
+ if (wr_waitp) {
+ wr_waitp->ret = ret;
+ wr_waitp->done = 1;
+ wake_up(&wr_waitp->wait);
+ }
+ break;
+ case 2:
+ c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
+ break;
+ default:
+ printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
+ rpl->type);
+ break;
+ }
+ return 0;
+}
+
+static void ep_timeout(unsigned long arg)
+{
+ struct c4iw_ep *ep = (struct c4iw_ep *)arg;
+ struct c4iw_qp_attributes attrs;
+ unsigned long flags;
+ int abort = 1;
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+ PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
+ ep->com.state);
+ switch (ep->com.state) {
+ case MPA_REQ_SENT:
+ __state_set(&ep->com, ABORTING);
+ connect_reply_upcall(ep, -ETIMEDOUT);
+ break;
+ case MPA_REQ_WAIT:
+ __state_set(&ep->com, ABORTING);
+ break;
+ case CLOSING:
+ case MORIBUND:
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = C4IW_QP_STATE_ERROR;
+ c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ }
+ __state_set(&ep->com, ABORTING);
+ break;
+ default:
+ printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n",
+ __func__, ep, ep->hwtid, ep->com.state);
+ WARN_ON(1);
+ abort = 0;
+ }
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (abort)
+ abort_connection(ep, NULL, GFP_ATOMIC);
+ c4iw_put_ep(&ep->com);
+}
+
+int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
+{
+ int err;
+ struct c4iw_ep *ep = to_ep(cm_id);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ if (state_read(&ep->com) == DEAD) {
+ c4iw_put_ep(&ep->com);
+ return -ECONNRESET;
+ }
+ BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
+ if (mpa_rev == 0)
+ abort_connection(ep, NULL, GFP_KERNEL);
+ else {
+ err = send_mpa_reject(ep, pdata, pdata_len);
+ err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+ }
+ c4iw_put_ep(&ep->com);
+ return 0;
+}
+
+int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+ int err;
+ struct c4iw_qp_attributes attrs;
+ enum c4iw_qp_attr_mask mask;
+ struct c4iw_ep *ep = to_ep(cm_id);
+ struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
+ struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ if (state_read(&ep->com) == DEAD) {
+ err = -ECONNRESET;
+ goto err;
+ }
+
+ BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
+ BUG_ON(!qp);
+
+ if ((conn_param->ord > T4_MAX_READ_DEPTH) ||
+ (conn_param->ird > T4_MAX_READ_DEPTH)) {
+ abort_connection(ep, NULL, GFP_KERNEL);
+ err = -EINVAL;
+ goto err;
+ }
+
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->com.qp = qp;
+
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+
+ if (peer2peer && ep->ird == 0)
+ ep->ird = 1;
+
+ PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
+
+ /* bind QP to EP and move to RTS */
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ird;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = C4IW_QP_STATE_RTS;
+
+ /* bind QP and TID with INIT_WR */
+ mask = C4IW_QP_ATTR_NEXT_STATE |
+ C4IW_QP_ATTR_LLP_STREAM_HANDLE |
+ C4IW_QP_ATTR_MPA_ATTR |
+ C4IW_QP_ATTR_MAX_IRD |
+ C4IW_QP_ATTR_MAX_ORD;
+
+ err = c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (err)
+ goto err1;
+ err = send_mpa_reply(ep, conn_param->private_data,
+ conn_param->private_data_len);
+ if (err)
+ goto err1;
+
+ state_set(&ep->com, FPDU_MODE);
+ established_upcall(ep);
+ c4iw_put_ep(&ep->com);
+ return 0;
+err1:
+ ep->com.cm_id = NULL;
+ ep->com.qp = NULL;
+ cm_id->rem_ref(cm_id);
+err:
+ c4iw_put_ep(&ep->com);
+ return err;
+}
+
+int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+ int err = 0;
+ struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
+ struct c4iw_ep *ep;
+ struct rtable *rt;
+ struct net_device *pdev;
+ int step;
+
+ ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+ if (!ep) {
+ printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
+ err = -ENOMEM;
+ goto out;
+ }
+ init_timer(&ep->timer);
+ ep->plen = conn_param->private_data_len;
+ if (ep->plen)
+ memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
+ conn_param->private_data, ep->plen);
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+
+ if (peer2peer && ep->ord == 0)
+ ep->ord = 1;
+
+ cm_id->add_ref(cm_id);
+ ep->com.dev = dev;
+ ep->com.cm_id = cm_id;
+ ep->com.qp = get_qhp(dev, conn_param->qpn);
+ BUG_ON(!ep->com.qp);
+ PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
+ ep->com.qp, cm_id);
+
+ /*
+ * Allocate an active TID to initiate a TCP connection.
+ */
+ ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
+ if (ep->atid == -1) {
+ printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
+ err = -ENOMEM;
+ goto fail2;
+ }
+
+ PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__,
+ ntohl(cm_id->local_addr.sin_addr.s_addr),
+ ntohs(cm_id->local_addr.sin_port),
+ ntohl(cm_id->remote_addr.sin_addr.s_addr),
+ ntohs(cm_id->remote_addr.sin_port));
+
+ /* find a route */
+ rt = find_route(dev,
+ cm_id->local_addr.sin_addr.s_addr,
+ cm_id->remote_addr.sin_addr.s_addr,
+ cm_id->local_addr.sin_port,
+ cm_id->remote_addr.sin_port, 0);
+ if (!rt) {
+ printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
+ err = -EHOSTUNREACH;
+ goto fail3;
+ }
+ ep->dst = &rt->u.dst;
+
+ /* get a l2t entry */
+ if (ep->dst->neighbour->dev->flags & IFF_LOOPBACK) {
+ PDBG("%s LOOPBACK\n", __func__);
+ pdev = ip_dev_find(&init_net,
+ cm_id->remote_addr.sin_addr.s_addr);
+ ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
+ ep->dst->neighbour,
+ pdev, 0);
+ ep->mtu = pdev->mtu;
+ ep->tx_chan = cxgb4_port_chan(pdev);
+ ep->smac_idx = ep->tx_chan << 1;
+ step = ep->com.dev->rdev.lldi.ntxq /
+ ep->com.dev->rdev.lldi.nchan;
+ ep->txq_idx = cxgb4_port_idx(pdev) * step;
+ step = ep->com.dev->rdev.lldi.nrxq /
+ ep->com.dev->rdev.lldi.nchan;
+ ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
+ cxgb4_port_idx(pdev) * step];
+ dev_put(pdev);
+ } else {
+ ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t,
+ ep->dst->neighbour,
+ ep->dst->neighbour->dev, 0);
+ ep->mtu = dst_mtu(ep->dst);
+ ep->tx_chan = cxgb4_port_chan(ep->dst->neighbour->dev);
+ ep->smac_idx = ep->tx_chan << 1;
+ step = ep->com.dev->rdev.lldi.ntxq /
+ ep->com.dev->rdev.lldi.nchan;
+ ep->txq_idx = cxgb4_port_idx(ep->dst->neighbour->dev) * step;
+ step = ep->com.dev->rdev.lldi.nrxq /
+ ep->com.dev->rdev.lldi.nchan;
+ ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[
+ cxgb4_port_idx(ep->dst->neighbour->dev) * step];
+ }
+ if (!ep->l2t) {
+ printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
+ err = -ENOMEM;
+ goto fail4;
+ }
+
+ PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
+ __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
+ ep->l2t->idx);
+
+ state_set(&ep->com, CONNECTING);
+ ep->tos = 0;
+ ep->com.local_addr = cm_id->local_addr;
+ ep->com.remote_addr = cm_id->remote_addr;
+
+ /* send connect request to rnic */
+ err = send_connect(ep);
+ if (!err)
+ goto out;
+
+ cxgb4_l2t_release(ep->l2t);
+fail4:
+ dst_release(ep->dst);
+fail3:
+ cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+fail2:
+ cm_id->rem_ref(cm_id);
+ c4iw_put_ep(&ep->com);
+out:
+ return err;
+}
+
+int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
+{
+ int err = 0;
+ struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
+ struct c4iw_listen_ep *ep;
+
+
+ might_sleep();
+
+ ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+ if (!ep) {
+ printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
+ err = -ENOMEM;
+ goto fail1;
+ }
+ PDBG("%s ep %p\n", __func__, ep);
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->com.dev = dev;
+ ep->backlog = backlog;
+ ep->com.local_addr = cm_id->local_addr;
+
+ /*
+ * Allocate a server TID.
+ */
+ ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep);
+ if (ep->stid == -1) {
+ printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
+ err = -ENOMEM;
+ goto fail2;
+ }
+
+ state_set(&ep->com, LISTEN);
+ err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid,
+ ep->com.local_addr.sin_addr.s_addr,
+ ep->com.local_addr.sin_port,
+ ep->com.dev->rdev.lldi.rxq_ids[0]);
+ if (err)
+ goto fail3;
+
+ /* wait for pass_open_rpl */
+ wait_event(ep->com.waitq, ep->com.rpl_done);
+ err = ep->com.rpl_err;
+ if (!err) {
+ cm_id->provider_data = ep;
+ goto out;
+ }
+fail3:
+ cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
+fail2:
+ cm_id->rem_ref(cm_id);
+ c4iw_put_ep(&ep->com);
+fail1:
+out:
+ return err;
+}
+
+int c4iw_destroy_listen(struct iw_cm_id *cm_id)
+{
+ int err;
+ struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
+
+ PDBG("%s ep %p\n", __func__, ep);
+
+ might_sleep();
+ state_set(&ep->com, DEAD);
+ ep->com.rpl_done = 0;
+ ep->com.rpl_err = 0;
+ err = listen_stop(ep);
+ if (err)
+ goto done;
+ wait_event(ep->com.waitq, ep->com.rpl_done);
+ cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
+done:
+ err = ep->com.rpl_err;
+ cm_id->rem_ref(cm_id);
+ c4iw_put_ep(&ep->com);
+ return err;
+}
+
+int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
+{
+ int ret = 0;
+ unsigned long flags;
+ int close = 0;
+ int fatal = 0;
+ struct c4iw_rdev *rdev;
+ int start_timer = 0;
+ int stop_timer = 0;
+
+ spin_lock_irqsave(&ep->com.lock, flags);
+
+ PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
+ states[ep->com.state], abrupt);
+
+ rdev = &ep->com.dev->rdev;
+ if (c4iw_fatal_error(rdev)) {
+ fatal = 1;
+ close_complete_upcall(ep);
+ ep->com.state = DEAD;
+ }
+ switch (ep->com.state) {
+ case MPA_REQ_WAIT:
+ case MPA_REQ_SENT:
+ case MPA_REQ_RCVD:
+ case MPA_REP_SENT:
+ case FPDU_MODE:
+ close = 1;
+ if (abrupt)
+ ep->com.state = ABORTING;
+ else {
+ ep->com.state = CLOSING;
+ start_timer = 1;
+ }
+ set_bit(CLOSE_SENT, &ep->com.flags);
+ break;
+ case CLOSING:
+ if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
+ close = 1;
+ if (abrupt) {
+ stop_timer = 1;
+ ep->com.state = ABORTING;
+ } else
+ ep->com.state = MORIBUND;
+ }
+ break;
+ case MORIBUND:
+ case ABORTING:
+ case DEAD:
+ PDBG("%s ignoring disconnect ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ spin_unlock_irqrestore(&ep->com.lock, flags);
+ if (start_timer)
+ start_ep_timer(ep);
+ if (stop_timer)
+ stop_ep_timer(ep);
+ if (close) {
+ if (abrupt)
+ ret = abort_connection(ep, NULL, gfp);
+ else
+ ret = send_halfclose(ep, gfp);
+ if (ret)
+ fatal = 1;
+ }
+ if (fatal)
+ release_ep_resources(ep);
+ return ret;
+}
+
+/*
+ * All the CM events are handled on a work queue to have a safe context.
+ */
+static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+
+ /*
+ * Save dev in the skb->cb area.
+ */
+ *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
+
+ /*
+ * Queue the skb and schedule the worker thread.
+ */
+ skb_queue_tail(&rxq, skb);
+ queue_work(workq, &skb_work);
+ return 0;
+}
+
+static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
+
+ if (rpl->status != CPL_ERR_NONE) {
+ printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
+ "for tid %u\n", rpl->status, GET_TID(rpl));
+ }
+ return 0;
+}
+
+int __init c4iw_cm_init(void)
+{
+ skb_queue_head_init(&rxq);
+
+ workq = create_singlethread_workqueue("iw_cxgb4");
+ if (!workq)
+ return -ENOMEM;
+
+ /*
+ * Most upcalls from the T4 Core go to sched() to
+ * schedule the processing on a work queue.
+ */
+ c4iw_handlers[CPL_ACT_ESTABLISH] = sched;
+ c4iw_handlers[CPL_ACT_OPEN_RPL] = sched;
+ c4iw_handlers[CPL_RX_DATA] = sched;
+ c4iw_handlers[CPL_ABORT_RPL_RSS] = sched;
+ c4iw_handlers[CPL_ABORT_RPL] = sched;
+ c4iw_handlers[CPL_PASS_OPEN_RPL] = sched;
+ c4iw_handlers[CPL_CLOSE_LISTSRV_RPL] = sched;
+ c4iw_handlers[CPL_PASS_ACCEPT_REQ] = sched;
+ c4iw_handlers[CPL_PASS_ESTABLISH] = sched;
+ c4iw_handlers[CPL_PEER_CLOSE] = sched;
+ c4iw_handlers[CPL_CLOSE_CON_RPL] = sched;
+ c4iw_handlers[CPL_ABORT_REQ_RSS] = sched;
+ c4iw_handlers[CPL_RDMA_TERMINATE] = sched;
+ c4iw_handlers[CPL_FW4_ACK] = sched;
+ c4iw_handlers[CPL_SET_TCB_RPL] = set_tcb_rpl;
+ c4iw_handlers[CPL_FW6_MSG] = fw6_msg;
+
+ /*
+ * These are the real handlers that are called from a
+ * work queue.
+ */
+ work_handlers[CPL_ACT_ESTABLISH] = act_establish;
+ work_handlers[CPL_ACT_OPEN_RPL] = act_open_rpl;
+ work_handlers[CPL_RX_DATA] = rx_data;
+ work_handlers[CPL_ABORT_RPL_RSS] = abort_rpl;
+ work_handlers[CPL_ABORT_RPL] = abort_rpl;
+ work_handlers[CPL_PASS_OPEN_RPL] = pass_open_rpl;
+ work_handlers[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl;
+ work_handlers[CPL_PASS_ACCEPT_REQ] = pass_accept_req;
+ work_handlers[CPL_PASS_ESTABLISH] = pass_establish;
+ work_handlers[CPL_PEER_CLOSE] = peer_close;
+ work_handlers[CPL_ABORT_REQ_RSS] = peer_abort;
+ work_handlers[CPL_CLOSE_CON_RPL] = close_con_rpl;
+ work_handlers[CPL_RDMA_TERMINATE] = terminate;
+ work_handlers[CPL_FW4_ACK] = fw4_ack;
+ return 0;
+}
+
+void __exit c4iw_cm_term(void)
+{
+ flush_workqueue(workq);
+ destroy_workqueue(workq);
+}