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path: root/drivers/infiniband/hw/cxgb3/iwch_cm.c
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Diffstat (limited to 'drivers/infiniband/hw/cxgb3/iwch_cm.c')
-rw-r--r--drivers/infiniband/hw/cxgb3/iwch_cm.c2081
1 files changed, 2081 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_cm.c b/drivers/infiniband/hw/cxgb3/iwch_cm.c
new file mode 100644
index 00000000000..a522b1baa3b
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb3/iwch_cm.c
@@ -0,0 +1,2081 @@
+/*
+ * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
+ * Copyright (c) 2006 Open Grid Computing, 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 <net/neighbour.h>
+#include <net/netevent.h>
+#include <net/route.h>
+
+#include "tcb.h"
+#include "cxgb3_offload.h"
+#include "iwch.h"
+#include "iwch_provider.h"
+#include "iwch_cm.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 ep_timeout_secs = 10;
+module_param(ep_timeout_secs, int, 0444);
+MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
+ "in seconds (default=10)");
+
+static int mpa_rev = 1;
+module_param(mpa_rev, int, 0444);
+MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
+ "1 is spec compliant. (default=1)");
+
+static int markers_enabled = 0;
+module_param(markers_enabled, int, 0444);
+MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
+
+static int crc_enabled = 1;
+module_param(crc_enabled, int, 0444);
+MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
+
+static int rcv_win = 256 * 1024;
+module_param(rcv_win, int, 0444);
+MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)");
+
+static int snd_win = 32 * 1024;
+module_param(snd_win, int, 0444);
+MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
+
+static unsigned int nocong = 0;
+module_param(nocong, uint, 0444);
+MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
+
+static unsigned int cong_flavor = 1;
+module_param(cong_flavor, uint, 0444);
+MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
+
+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 cxgb3_cpl_handler_func work_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 iwch_ep *ep, int status);
+
+static void start_ep_timer(struct iwch_ep *ep)
+{
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ if (timer_pending(&ep->timer)) {
+ PDBG("%s stopped / restarted timer ep %p\n", __FUNCTION__, ep);
+ del_timer_sync(&ep->timer);
+ } else
+ 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 iwch_ep *ep)
+{
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ del_timer_sync(&ep->timer);
+ put_ep(&ep->com);
+}
+
+static void release_tid(struct t3cdev *tdev, 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));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
+ skb->priority = CPL_PRIORITY_SETUP;
+ tdev->send(tdev, skb);
+ return;
+}
+
+int iwch_quiesce_tid(struct iwch_ep *ep)
+{
+ struct cpl_set_tcb_field *req;
+ struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+
+ if (!skb)
+ return -ENOMEM;
+ req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
+ req->reply = 0;
+ req->cpu_idx = 0;
+ req->word = htons(W_TCB_RX_QUIESCE);
+ req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
+ req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
+
+ skb->priority = CPL_PRIORITY_DATA;
+ ep->com.tdev->send(ep->com.tdev, skb);
+ return 0;
+}
+
+int iwch_resume_tid(struct iwch_ep *ep)
+{
+ struct cpl_set_tcb_field *req;
+ struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+
+ if (!skb)
+ return -ENOMEM;
+ req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
+ req->reply = 0;
+ req->cpu_idx = 0;
+ req->word = htons(W_TCB_RX_QUIESCE);
+ req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
+ req->val = 0;
+
+ skb->priority = CPL_PRIORITY_DATA;
+ ep->com.tdev->send(ep->com.tdev, skb);
+ return 0;
+}
+
+static void set_emss(struct iwch_ep *ep, u16 opt)
+{
+ PDBG("%s ep %p opt %u\n", __FUNCTION__, ep, opt);
+ ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
+ if (G_TCPOPT_TSTAMP(opt))
+ ep->emss -= 12;
+ if (ep->emss < 128)
+ ep->emss = 128;
+ PDBG("emss=%d\n", ep->emss);
+}
+
+static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
+{
+ unsigned long flags;
+ enum iwch_ep_state state;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ state = epc->state;
+ spin_unlock_irqrestore(&epc->lock, flags);
+ return state;
+}
+
+static inline void __state_set(struct iwch_ep_common *epc,
+ enum iwch_ep_state new)
+{
+ epc->state = new;
+}
+
+static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&epc->lock, flags);
+ PDBG("%s - %s -> %s\n", __FUNCTION__, 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 iwch_ep_common *epc;
+
+ epc = kmalloc(size, gfp);
+ if (epc) {
+ memset(epc, 0, size);
+ kref_init(&epc->kref);
+ spin_lock_init(&epc->lock);
+ init_waitqueue_head(&epc->waitq);
+ }
+ PDBG("%s alloc ep %p\n", __FUNCTION__, epc);
+ return epc;
+}
+
+void __free_ep(struct kref *kref)
+{
+ struct iwch_ep_common *epc;
+ epc = container_of(kref, struct iwch_ep_common, kref);
+ PDBG("%s ep %p state %s\n", __FUNCTION__, epc, states[state_read(epc)]);
+ kfree(epc);
+}
+
+static void release_ep_resources(struct iwch_ep *ep)
+{
+ PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, ep->hwtid);
+ cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
+ dst_release(ep->dst);
+ l2t_release(L2DATA(ep->com.tdev), ep->l2t);
+ if (ep->com.tdev->type == T3B)
+ release_tid(ep->com.tdev, ep->hwtid, NULL);
+ put_ep(&ep->com);
+}
+
+static void process_work(struct work_struct *work)
+{
+ struct sk_buff *skb = NULL;
+ void *ep;
+ struct t3cdev *tdev;
+ int ret;
+
+ while ((skb = skb_dequeue(&rxq))) {
+ ep = *((void **) (skb->cb));
+ tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
+ ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
+ if (ret & CPL_RET_BUF_DONE)
+ kfree_skb(skb);
+
+ /*
+ * ep was referenced in sched(), and is freed here.
+ */
+ put_ep((struct iwch_ep_common *)ep);
+ }
+}
+
+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) {
+ BUG_ON(skb_cloned(skb));
+ skb_trim(skb, 0);
+ skb_get(skb);
+ } else {
+ skb = alloc_skb(len, gfp);
+ }
+ return skb;
+}
+
+static struct rtable *find_route(struct t3cdev *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(&rt, &fl, NULL, 0))
+ return NULL;
+ return rt;
+}
+
+static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
+{
+ int i = 0;
+
+ while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
+ ++i;
+ return i;
+}
+
+static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
+{
+ PDBG("%s t3cdev %p\n", __FUNCTION__, dev);
+ kfree_skb(skb);
+}
+
+/*
+ * Handle an ARP failure for an active open.
+ */
+static void act_open_req_arp_failure(struct t3cdev *dev, 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(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_abort_req *req = cplhdr(skb);
+
+ PDBG("%s t3cdev %p\n", __FUNCTION__, dev);
+ req->cmd = CPL_ABORT_NO_RST;
+ cxgb3_ofld_send(dev, skb);
+}
+
+static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
+{
+ struct cpl_close_con_req *req;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ skb = get_skb(NULL, sizeof(*req), gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, arp_failure_discard);
+ req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
+ req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
+ l2t_send(ep->com.tdev, skb, ep->l2t);
+ return 0;
+}
+
+static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ struct cpl_abort_req *req;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ skb = get_skb(skb, sizeof(*req), gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __FUNCTION__);
+ return -ENOMEM;
+ }
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, abort_arp_failure);
+ req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
+ req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
+ req->cmd = CPL_ABORT_SEND_RST;
+ l2t_send(ep->com.tdev, skb, ep->l2t);
+ return 0;
+}
+
+static int send_connect(struct iwch_ep *ep)
+{
+ struct cpl_act_open_req *req;
+ struct sk_buff *skb;
+ u32 opt0h, opt0l, opt2;
+ unsigned int mtu_idx;
+ int wscale;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __FUNCTION__);
+ return -ENOMEM;
+ }
+ mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
+ wscale = compute_wscale(rcv_win);
+ opt0h = V_NAGLE(0) |
+ V_NO_CONG(nocong) |
+ V_KEEP_ALIVE(1) |
+ F_TCAM_BYPASS |
+ V_WND_SCALE(wscale) |
+ V_MSS_IDX(mtu_idx) |
+ V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
+ opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
+ opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor);
+ skb->priority = CPL_PRIORITY_SETUP;
+ set_arp_failure_handler(skb, act_open_req_arp_failure);
+
+ req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, 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->opt0h = htonl(opt0h);
+ req->opt0l = htonl(opt0l);
+ req->params = 0;
+ req->opt2 = htonl(opt2);
+ l2t_send(ep->com.tdev, skb, ep->l2t);
+ return 0;
+}
+
+static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
+{
+ int mpalen;
+ struct tx_data_wr *req;
+ struct mpa_message *mpa;
+ int len;
+
+ PDBG("%s ep %p pd_len %d\n", __FUNCTION__, ep, ep->plen);
+
+ BUG_ON(skb_cloned(skb));
+
+ mpalen = sizeof(*mpa) + ep->plen;
+ if (skb->data + mpalen + sizeof(*req) > skb->end) {
+ kfree_skb(skb);
+ skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ connect_reply_upcall(ep, -ENOMEM);
+ return;
+ }
+ }
+ skb_trim(skb, 0);
+ skb_reserve(skb, sizeof(*req));
+ skb_put(skb, mpalen);
+ skb->priority = CPL_PRIORITY_DATA;
+ mpa = (struct mpa_message *) skb->data;
+ memset(mpa, 0, sizeof(*mpa));
+ 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 tx_ack() will deref it.
+ */
+ skb_get(skb);
+ set_arp_failure_handler(skb, arp_failure_discard);
+ skb->h.raw = skb->data;
+ len = skb->len;
+ req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA));
+ req->wr_lo = htonl(V_WR_TID(ep->hwtid));
+ req->len = htonl(len);
+ req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
+ V_TX_SNDBUF(snd_win>>15));
+ req->flags = htonl(F_TX_IMM_ACK|F_TX_INIT);
+ req->sndseq = htonl(ep->snd_seq);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ l2t_send(ep->com.tdev, skb, ep->l2t);
+ start_ep_timer(ep);
+ state_set(&ep->com, MPA_REQ_SENT);
+ return;
+}
+
+static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen;
+ struct tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p plen %d\n", __FUNCTION__, ep, plen);
+
+ mpalen = sizeof(*mpa) + plen;
+
+ skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+ skb_reserve(skb, sizeof(*req));
+ mpa = (struct mpa_message *) skb_put(skb, mpalen);
+ 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 tx_ack() will deref it.
+ */
+ skb_get(skb);
+ skb->priority = CPL_PRIORITY_DATA;
+ set_arp_failure_handler(skb, arp_failure_discard);
+ skb->h.raw = skb->data;
+ req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA));
+ req->wr_lo = htonl(V_WR_TID(ep->hwtid));
+ req->len = htonl(mpalen);
+ req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
+ V_TX_SNDBUF(snd_win>>15));
+ req->flags = htonl(F_TX_IMM_ACK|F_TX_INIT);
+ req->sndseq = htonl(ep->snd_seq);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ l2t_send(ep->com.tdev, skb, ep->l2t);
+ return 0;
+}
+
+static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen;
+ struct tx_data_wr *req;
+ struct mpa_message *mpa;
+ int len;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p plen %d\n", __FUNCTION__, ep, plen);
+
+ mpalen = sizeof(*mpa) + plen;
+
+ skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+ skb->priority = CPL_PRIORITY_DATA;
+ skb_reserve(skb, sizeof(*req));
+ mpa = (struct mpa_message *) skb_put(skb, mpalen);
+ 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 tx_ack() will deref it.
+ */
+ skb_get(skb);
+ set_arp_failure_handler(skb, arp_failure_discard);
+ skb->h.raw = skb->data;
+ len = skb->len;
+ req = (struct tx_data_wr *) skb_push(skb, sizeof(*req));
+ req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA));
+ req->wr_lo = htonl(V_WR_TID(ep->hwtid));
+ req->len = htonl(len);
+ req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
+ V_TX_SNDBUF(snd_win>>15));
+ req->flags = htonl(F_TX_MORE | F_TX_IMM_ACK | F_TX_INIT);
+ req->sndseq = htonl(ep->snd_seq);
+ ep->mpa_skb = skb;
+ state_set(&ep->com, MPA_REP_SENT);
+ l2t_send(ep->com.tdev, skb, ep->l2t);
+ return 0;
+}
+
+static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_act_establish *req = cplhdr(skb);
+ unsigned int tid = GET_TID(req);
+
+ PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, tid);
+
+ dst_confirm(ep->dst);
+
+ /* setup the hwtid for this connection */
+ ep->hwtid = tid;
+ cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
+
+ ep->snd_seq = ntohl(req->snd_isn);
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ /* dealloc the atid */
+ cxgb3_free_atid(ep->com.tdev, ep->atid);
+
+ /* start MPA negotiation */
+ send_mpa_req(ep, skb);
+
+ return 0;
+}
+
+static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ PDBG("%s ep %p\n", __FILE__, ep);
+ state_set(&ep->com, ABORTING);
+ send_abort(ep, skb, gfp);
+}
+
+static void close_complete_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ 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 %d\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 peer_close_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ 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 %d\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 iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ 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 %d\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 iwch_ep *ep, int status)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p status %d\n", __FUNCTION__, ep, 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 %d status %d\n", __FUNCTION__, 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 iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %d\n", __FUNCTION__, 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)
+ ep->parent_ep->com.cm_id->event_handler(
+ ep->parent_ep->com.cm_id,
+ &event);
+ put_ep(&ep->parent_ep->com);
+ ep->parent_ep = NULL;
+}
+
+static void established_upcall(struct iwch_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_ESTABLISHED;
+ if (ep->com.cm_id) {
+ PDBG("%s ep %p tid %d\n", __FUNCTION__, ep, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ }
+}
+
+static int update_rx_credits(struct iwch_ep *ep, u32 credits)
+{
+ struct cpl_rx_data_ack *req;
+ struct sk_buff *skb;
+
+ PDBG("%s ep %p credits %u\n", __FUNCTION__, ep, credits);
+ skb = get_skb(NULL, sizeof(*req), 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, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid));
+ req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
+ skb->priority = CPL_PRIORITY_ACK;
+ ep->com.tdev->send(ep->com.tdev, skb);
+ return credits;
+}
+
+static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ u16 plen;
+ struct iwch_qp_attributes attrs;
+ enum iwch_qp_attr_mask mask;
+ int err;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+
+ /*
+ * 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.
+ */
+ memcpy(&(ep->mpa_pkt[ep->mpa_pkt_len]), skb->data, 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;
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d\n", __FUNCTION__,
+ 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 = IWCH_QP_STATE_RTS;
+
+ mask = IWCH_QP_ATTR_NEXT_STATE |
+ IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
+ IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
+
+ /* bind QP and TID with INIT_WR */
+ err = iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (!err)
+ goto out;
+err:
+ abort_connection(ep, skb, GFP_KERNEL);
+out:
+ connect_reply_upcall(ep, err);
+ return;
+}
+
+static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ u16 plen;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+
+ /*
+ * 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_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)) {
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ PDBG("%s enter (%s line %u)\n", __FUNCTION__, __FILE__, __LINE__);
+
+ /*
+ * Copy the new data into our accumulation buffer.
+ */
+ memcpy(&(ep->mpa_pkt[ep->mpa_pkt_len]), skb->data, 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", __FUNCTION__, __FILE__, __LINE__);
+ 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.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;
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d\n", __FUNCTION__,
+ ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
+
+ state_set(&ep->com, MPA_REQ_RCVD);
+
+ /* drive upcall */
+ connect_request_upcall(ep);
+ return;
+}
+
+static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_rx_data *hdr = cplhdr(skb);
+ unsigned int dlen = ntohs(hdr->len);
+
+ PDBG("%s ep %p dlen %u\n", __FUNCTION__, ep, dlen);
+
+ skb_pull(skb, sizeof(*hdr));
+ skb_trim(skb, 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 %d\n",
+ __FUNCTION__, ep, state_read(&ep->com), ep->hwtid);
+
+ /*
+ * The ep will timeout and inform the ULP of the failure.
+ * See ep_timeout().
+ */
+ break;
+ }
+
+ /* update RX credits */
+ update_rx_credits(ep, dlen);
+
+ return CPL_RET_BUF_DONE;
+}
+
+/*
+ * 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 tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_wr_ack *hdr = cplhdr(skb);
+ unsigned int credits = ntohs(hdr->credits);
+ enum iwch_qp_attr_mask mask;
+
+ PDBG("%s ep %p credits %u\n", __FUNCTION__, ep, credits);
+
+ if (credits == 0)
+ return CPL_RET_BUF_DONE;
+ BUG_ON(credits != 1);
+ BUG_ON(ep->mpa_skb == NULL);
+ kfree_skb(ep->mpa_skb);
+ ep->mpa_skb = NULL;
+ dst_confirm(ep->dst);
+ if (state_read(&ep->com) == MPA_REP_SENT) {
+ struct iwch_qp_attributes attrs;
+
+ /* bind QP to EP and move to RTS */
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ord;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = IWCH_QP_STATE_RTS;
+
+ /* bind QP and TID with INIT_WR */
+ mask = IWCH_QP_ATTR_NEXT_STATE |
+ IWCH_QP_ATTR_LLP_STREAM_HANDLE |
+ IWCH_QP_ATTR_MPA_ATTR |
+ IWCH_QP_ATTR_MAX_IRD |
+ IWCH_QP_ATTR_MAX_ORD;
+
+ ep->com.rpl_err = iwch_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+
+ if (!ep->com.rpl_err) {
+ state_set(&ep->com, FPDU_MODE);
+ established_upcall(ep);
+ }
+
+ ep->com.rpl_done = 1;
+ PDBG("waking up ep %p\n", ep);
+ wake_up(&ep->com.waitq);
+ }
+ return CPL_RET_BUF_DONE;
+}
+
+static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+
+ close_complete_upcall(ep);
+ state_set(&ep->com, DEAD);
+ release_ep_resources(ep);
+ return CPL_RET_BUF_DONE;
+}
+
+static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
+{
+ struct iwch_ep *ep = ctx;
+ struct cpl_act_open_rpl *rpl = cplhdr(skb);
+
+ PDBG("%s ep %p status %u errno %d\n", __FUNCTION__, ep, rpl->status,
+ status2errno(rpl->status));
+ connect_reply_upcall(ep, status2errno(rpl->status));
+ state_set(&ep->com, DEAD);
+ if (ep->com.tdev->type == T3B)
+ release_tid(ep->com.tdev, GET_TID(rpl), NULL);
+ cxgb3_free_atid(ep->com.tdev, ep->atid);
+ dst_release(ep->dst);
+ l2t_release(L2DATA(ep->com.tdev), ep->l2t);
+ put_ep(&ep->com);
+ return CPL_RET_BUF_DONE;
+}
+
+static int listen_start(struct iwch_listen_ep *ep)
+{
+ struct sk_buff *skb;
+ struct cpl_pass_open_req *req;
+
+ PDBG("%s ep %p\n", __FUNCTION__, ep);
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n");
+ return -ENOMEM;
+ }
+
+ req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid));
+ req->local_port = ep->com.local_addr.sin_port;
+ req->local_ip = ep->com.local_addr.sin_addr.s_addr;
+ req->peer_port = 0;
+ req->peer_ip = 0;
+ req->peer_netmask = 0;
+ req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
+ req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
+ req->opt1 = htonl(V_CONN_PO