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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.c2258
1 files changed, 0 insertions, 2258 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_cm.c b/drivers/infiniband/hw/cxgb3/iwch_cm.c
deleted file mode 100644
index 0bca72cb4d9a..000000000000
--- a/drivers/infiniband/hw/cxgb3/iwch_cm.c
+++ /dev/null
@@ -1,2258 +0,0 @@
-/*
- * Copyright (c) 2006 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/slab.h>
-#include <linux/workqueue.h>
-#include <linux/skbuff.h>
-#include <linux/timer.h>
-#include <linux/notifier.h>
-#include <linux/inetdevice.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,
-};
-
-int peer2peer = 0;
-module_param(peer2peer, int, 0644);
-MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
-
-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 = 0;
-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=256)");
-
-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 unsigned int nocong = 0;
-module_param(nocong, uint, 0644);
-MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
-
-static unsigned int cong_flavor = 1;
-module_param(cong_flavor, uint, 0644);
-MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
-
-static struct workqueue_struct *workq;
-
-static struct sk_buff_head rxq;
-
-static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
-static void ep_timeout(struct timer_list *t);
-static void connect_reply_upcall(struct iwch_ep *ep, int status);
-
-static void start_ep_timer(struct iwch_ep *ep)
-{
- pr_debug("%s ep %p\n", __func__, ep);
- if (timer_pending(&ep->timer)) {
- pr_debug("%s stopped / restarted timer ep %p\n", __func__, ep);
- del_timer_sync(&ep->timer);
- } else
- get_ep(&ep->com);
- ep->timer.expires = jiffies + ep_timeout_secs * HZ;
- add_timer(&ep->timer);
-}
-
-static void stop_ep_timer(struct iwch_ep *ep)
-{
- pr_debug("%s ep %p\n", __func__, ep);
- if (!timer_pending(&ep->timer)) {
- WARN(1, "%s timer stopped when its not running! ep %p state %u\n",
- __func__, ep, ep->com.state);
- return;
- }
- del_timer_sync(&ep->timer);
- put_ep(&ep->com);
-}
-
-static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
-{
- int error = 0;
- struct cxio_rdev *rdev;
-
- rdev = (struct cxio_rdev *)tdev->ulp;
- if (cxio_fatal_error(rdev)) {
- kfree_skb(skb);
- return -EIO;
- }
- error = l2t_send(tdev, skb, l2e);
- if (error < 0)
- kfree_skb(skb);
- return error < 0 ? error : 0;
-}
-
-int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
-{
- int error = 0;
- struct cxio_rdev *rdev;
-
- rdev = (struct cxio_rdev *)tdev->ulp;
- if (cxio_fatal_error(rdev)) {
- kfree_skb(skb);
- return -EIO;
- }
- error = cxgb3_ofld_send(tdev, skb);
- if (error < 0)
- kfree_skb(skb);
- return error < 0 ? error : 0;
-}
-
-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 = 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;
- iwch_cxgb3_ofld_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 = 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;
- return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
-}
-
-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 = 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;
- return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
-}
-
-static void set_emss(struct iwch_ep *ep, u16 opt)
-{
- pr_debug("%s ep %p opt %u\n", __func__, 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;
- pr_debug("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 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);
- pr_debug("%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 iwch_ep_common *epc;
-
- epc = kzalloc(size, gfp);
- if (epc) {
- kref_init(&epc->kref);
- spin_lock_init(&epc->lock);
- init_waitqueue_head(&epc->waitq);
- }
- pr_debug("%s alloc ep %p\n", __func__, epc);
- return epc;
-}
-
-void __free_ep(struct kref *kref)
-{
- struct iwch_ep *ep;
- ep = container_of(container_of(kref, struct iwch_ep_common, kref),
- struct iwch_ep, com);
- pr_debug("%s ep %p state %s\n",
- __func__, ep, states[state_read(&ep->com)]);
- if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
- cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
- dst_release(ep->dst);
- l2t_release(ep->com.tdev, ep->l2t);
- }
- kfree(ep);
-}
-
-static void release_ep_resources(struct iwch_ep *ep)
-{
- pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
- set_bit(RELEASE_RESOURCES, &ep->com.flags);
- put_ep(&ep->com);
-}
-
-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);
- } 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 flowi4 fl4;
-
- rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
- peer_port, local_port, IPPROTO_TCP,
- tos, 0);
- if (IS_ERR(rt))
- 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)
-{
- pr_debug("%s t3cdev %p\n", __func__, 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)
-{
- pr_err("ARP failure during 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);
-
- pr_debug("%s t3cdev %p\n", __func__, dev);
- req->cmd = CPL_ABORT_NO_RST;
- iwch_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;
-
- pr_debug("%s ep %p\n", __func__, ep);
- skb = get_skb(NULL, sizeof(*req), gfp);
- if (!skb) {
- pr_err("%s - failed to alloc skb\n", __func__);
- return -ENOMEM;
- }
- skb->priority = CPL_PRIORITY_DATA;
- set_arp_failure_handler(skb, arp_failure_discard);
- 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));
- return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
-}
-
-static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
-{
- struct cpl_abort_req *req;
-
- pr_debug("%s ep %p\n", __func__, ep);
- skb = get_skb(skb, sizeof(*req), gfp);
- if (!skb) {
- pr_err("%s - failed to alloc skb\n", __func__);
- return -ENOMEM;
- }
- skb->priority = CPL_PRIORITY_DATA;
- set_arp_failure_handler(skb, abort_arp_failure);
- req = skb_put_zero(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;
- return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
-}
-
-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;
-
- pr_debug("%s ep %p\n", __func__, ep);
-
- skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
- if (!skb) {
- pr_err("%s - failed to alloc skb\n", __func__);
- 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 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | 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 = 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);
- return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
-}
-
-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;
-
- pr_debug("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
-
- BUG_ON(skb_cloned(skb));
-
- mpalen = sizeof(*mpa) + ep->plen;
- if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
- 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_reset_transport_header(skb);
- len = skb->len;
- req = skb_push(skb, sizeof(*req));
- req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
- 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_INIT);
- req->sndseq = htonl(ep->snd_seq);
- BUG_ON(ep->mpa_skb);
- ep->mpa_skb = skb;
- iwch_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;
-
- pr_debug("%s ep %p plen %d\n", __func__, ep, plen);
-
- mpalen = sizeof(*mpa) + plen;
-
- skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
- if (!skb) {
- pr_err("%s - cannot alloc skb!\n", __func__);
- return -ENOMEM;
- }
- skb_reserve(skb, sizeof(*req));
- mpa = 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_reset_transport_header(skb);
- req = skb_push(skb, sizeof(*req));
- req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
- 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_INIT);
- req->sndseq = htonl(ep->snd_seq);
- BUG_ON(ep->mpa_skb);
- ep->mpa_skb = skb;
- return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
-}
-
-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;
-
- pr_debug("%s ep %p plen %d\n", __func__, ep, plen);
-
- mpalen = sizeof(*mpa) + plen;
-
- skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
- if (!skb) {
- pr_err("%s - cannot alloc skb!\n", __func__);
- return -ENOMEM;
- }
- skb->priority = CPL_PRIORITY_DATA;
- skb_reserve(skb, sizeof(*req));
- mpa = 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_reset_transport_header(skb);
- len = skb->len;
- req = skb_push(skb, sizeof(*req));
- req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
- 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_INIT);
- req->sndseq = htonl(ep->snd_seq);
- ep->mpa_skb = skb;
- state_set(&ep->com, MPA_REP_SENT);
- return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
-}
-
-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);
-
- pr_debug("%s ep %p tid %d\n", __func__, 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);
- ep->rcv_seq = ntohl(req->rcv_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)
-{
- pr_debug("%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;
-
- pr_debug("%s ep %p\n", __func__, ep);
- memset(&event, 0, sizeof(event));
- event.event = IW_CM_EVENT_CLOSE;
- if (ep->com.cm_id) {
- pr_debug("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;
-
- pr_debug("%s ep %p\n", __func__, ep);
- memset(&event, 0, sizeof(event));
- event.event = IW_CM_EVENT_DISCONNECT;
- if (ep->com.cm_id) {
- pr_debug("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;
-
- pr_debug("%s ep %p\n", __func__, ep);
- memset(&event, 0, sizeof(event));
- event.event = IW_CM_EVENT_CLOSE;
- event.status = -ECONNRESET;
- if (ep->com.cm_id) {
- pr_debug("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;
-
- pr_debug("%s ep %p status %d\n", __func__, ep, status);
- memset(&event, 0, sizeof(event));
- event.event = IW_CM_EVENT_CONNECT_REPLY;
- event.status = status;
- memcpy(&event.local_addr, &ep->com.local_addr,
- sizeof(ep->com.local_addr));
- memcpy(&event.remote_addr, &ep->com.remote_addr,
- sizeof(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) {
- pr_debug("%s ep %p tid %d 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 iwch_ep *ep)
-{
- struct iw_cm_event event;
-
- pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
- memset(&event, 0, sizeof(event));
- event.event = IW_CM_EVENT_CONNECT_REQUEST;
- memcpy(&event.local_addr, &ep->com.local_addr,
- sizeof(ep->com.local_addr));
- memcpy(&event.remote_addr, &ep->com.remote_addr,
- sizeof(ep->com.local_addr));
- event.private_data_len = ep->plen;
- event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
- event.provider_data = ep;
- /*
- * Until ird/ord negotiation via MPAv2 support is added, send max
- * supported values
- */
- event.ird = event.ord = 8;
- if (state_read(&ep->parent_ep->com) != DEAD) {
- get_ep(&ep->com);
- 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;
-
- pr_debug("%s ep %p\n", __func__, ep);
- memset(&event, 0, sizeof(event));
- event.event = IW_CM_EVENT_ESTABLISHED;
- /*
- * Until ird/ord negotiation via MPAv2 support is added, send max
- * supported values
- */
- event.ird = event.ord = 8;
- if (ep->com.cm_id) {
- pr_debug("%s ep %p tid %d\n", __func__, 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;
-
- pr_debug("%s ep %p credits %u\n", __func__, ep, credits);
- skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
- if (!skb) {
- pr_err("update_rx_credits - cannot alloc skb!\n");
- return 0;
- }
-
- 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_RX_DATA_ACK, ep->hwtid));
- req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
- skb->priority = CPL_PRIORITY_ACK;
- iwch_cxgb3_ofld_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;
-
- pr_debug("%s ep %p\n", __func__, 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.
- */
- 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.initiator = 1;
- 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;
- pr_debug("%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 = 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 err;
-
- if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
- iwch_post_zb_read(ep);
- }
-
- 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;
-
- pr_debug("%s ep %p\n", __func__, 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;
- }
-
- pr_debug("%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;
- pr_debug("%s enter (%s line %u)\n", __func__, __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.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;
- pr_debug("%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);
-
- 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);
-
- pr_debug("%s ep %p dlen %u\n", __func__, ep, dlen);
-
- skb_pull(skb, sizeof(*hdr));
- skb_trim(skb, dlen);
-
- ep->rcv_seq += dlen;
- BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + 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:
- pr_err("%s Unexpected streaming data. ep %p state %d tid %d\n",
- __func__, 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);
- unsigned long flags;
- int post_zb = 0;
-
- pr_debug("%s ep %p credits %u\n", __func__, ep, credits);
-
- if (credits == 0) {
- pr_debug("%s 0 credit ack ep %p state %u\n",
- __func__, ep, state_read(&ep->com));
- return CPL_RET_BUF_DONE;
- }
-
- spin_lock_irqsave(&ep->com.lock, flags);
- BUG_ON(credits != 1);
- dst_confirm(ep->dst);
- if (!ep->mpa_skb) {
- pr_debug("%s rdma_init wr_ack ep %p state %u\n",
- __func__, ep, ep->com.state);
- if (ep->mpa_attr.initiator) {
- pr_debug("%s initiator ep %p state %u\n",
- __func__, ep, ep->com.state);
- if (peer2peer && ep->com.state == FPDU_MODE)
- post_zb = 1;
- } else {
- pr_debug("%s responder ep %p state %u\n",
- __func__, ep, ep->com.state);
- if (ep->com.state == MPA_REQ_RCVD) {
- ep->com.rpl_done = 1;
- wake_up(&ep->com.waitq);
- }
- }
- } else {
- pr_debug("%s lsm ack ep %p state %u freeing skb\n",
- __func__, ep, ep->com.state);
- kfree_skb(ep->mpa_skb);
- ep->mpa_skb = NULL;
- }
- spin_unlock_irqrestore(&ep->com.lock, flags);
- if (post_zb)
- iwch_post_zb_read(ep);
- return CPL_RET_BUF_DONE;
-}
-
-static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *ep = ctx;
- unsigned long flags;
- int release = 0;
-
- pr_debug("%s ep %p\n", __func__, ep);
- BUG_ON(!ep);
-
- /*
- * We get 2 abort replies from the HW. The first one must
- * be ignored except for scribbling that we need one more.
- */
- if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
- return CPL_RET_BUF_DONE;
- }
-
- spin_lock_irqsave(&ep->com.lock, flags);
- switch (ep->com.state) {
- case ABORTING:
- close_complete_upcall(ep);
- __state_set(&ep->com, DEAD);
- release = 1;
- break;
- default:
- pr_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 CPL_RET_BUF_DONE;
-}
-
-/*
- * 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 t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *ep = ctx;
- struct cpl_act_open_rpl *rpl = cplhdr(skb);
-
- pr_debug("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
- status2errno(rpl->status));
- connect_reply_upcall(ep, status2errno(rpl->status));
- state_set(&ep->com, DEAD);
- if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
- release_tid(ep->com.tdev, GET_TID(rpl), NULL);
- cxgb3_free_atid(ep->com.tdev, ep->atid);
- dst_release(ep->dst);
- l2t_release(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;
-
- pr_debug("%s ep %p\n", __func__, ep);
- skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
- if (!skb) {
- pr_err("t3c_listen_start failed to alloc skb!\n");
- return -ENOMEM;
- }
-
- 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_POLICY(CPL_CONN_POLICY_ASK));
-
- skb->priority = 1;
- return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
-}
-
-static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_listen_ep *ep = ctx;
- struct cpl_pass_open_rpl *rpl = cplhdr(skb);
-
- pr_debug("%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 CPL_RET_BUF_DONE;
-}
-
-static int listen_stop(struct iwch_listen_ep *ep)
-{
- struct sk_buff *skb;
- struct cpl_close_listserv_req *req;
-
- pr_debug("%s ep %p\n", __func__, ep);
- skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
- if (!skb) {
- pr_err("%s - failed to alloc skb\n", __func__);
- return -ENOMEM;
- }
- req = skb_put(skb, sizeof(*req));
- req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
- req->cpu_idx = 0;
- OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
- skb->priority = 1;
- return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
-}
-
-static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
- void *ctx)
-{
- struct iwch_listen_ep *ep = ctx;
- struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
-
- pr_debug("%s ep %p\n", __func__, ep);
- ep->com.rpl_err = status2errno(rpl->status);
- ep->com.rpl_done = 1;
- wake_up(&ep->com.waitq);
- return CPL_RET_BUF_DONE;
-}
-
-static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
-{
- struct cpl_pass_accept_rpl *rpl;
- unsigned int mtu_idx;
- u32 opt0h, opt0l, opt2;
- int wscale;
-
- pr_debug("%s ep %p\n", __func__, ep);
- BUG_ON(skb_cloned(skb));
- skb_trim(skb, sizeof(*rpl));
- skb_get(skb);
- 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 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
- V_CONG_CONTROL_FLAVOR(cong_flavor);
-
- rpl = cplhdr(skb);
- rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
- OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
- rpl->peer_ip = peer_ip;
- rpl->opt0h = htonl(opt0h);
- rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
- rpl->opt2 = htonl(opt2);
- rpl->rsvd = rpl->opt2; /* workaround for HW bug */
- skb->priority = CPL_PRIORITY_SETUP;
- iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
-
- return;
-}
-
-static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
- struct sk_buff *skb)
-{
- pr_debug("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
- peer_ip);
- BUG_ON(skb_cloned(skb));
- skb_trim(skb, sizeof(struct cpl_tid_release));
- skb_get(skb);
-
- if (tdev->type != T3A)
- release_tid(tdev, hwtid, skb);
- else {
- struct cpl_pass_accept_rpl *rpl;
-
- rpl = cplhdr(skb);
- skb->priority = CPL_PRIORITY_SETUP;
- rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
- OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
- hwtid));
- rpl->peer_ip = peer_ip;
- rpl->opt0h = htonl(F_TCAM_BYPASS);
- rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
- rpl->opt2 = 0;
- rpl->rsvd = rpl->opt2;
- iwch_cxgb3_ofld_send(tdev, skb);
- }
-}
-
-static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *child_ep, *parent_ep = ctx;
- struct cpl_pass_accept_req *req = cplhdr(skb);
- unsigned int hwtid = GET_TID(req);
- struct dst_entry *dst;
- struct l2t_entry *l2t;
- struct rtable *rt;
- struct iff_mac tim;
-
- pr_debug("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
-
- if (state_read(&parent_ep->com) != LISTEN) {
- pr_err("%s - listening ep not in LISTEN\n", __func__);
- goto reject;
- }
-
- /*
- * Find the netdev for this connection request.
- */
- tim.mac_addr = req->dst_mac;
- tim.vlan_tag = ntohs(req->vlan_tag);
- if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
- pr_err("%s bad dst mac %pM\n", __func__, req->dst_mac);
- goto reject;
- }
-
- /* Find output route */
- rt = find_route(tdev,
- req->local_ip,
- req->peer_ip,
- req->local_port,
- req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
- if (!rt) {
- pr_err("%s - failed to find dst entry!\n", __func__);
- goto reject;
- }
- dst = &rt->dst;
- l2t = t3_l2t_get(tdev, dst, NULL, &req->peer_ip);
- if (!l2t) {
- pr_err("%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) {
- pr_err("%s - failed to allocate ep entry!\n", __func__);
- l2t_release(tdev, l2t);
- dst_release(dst);
- goto reject;
- }
- state_set(&child_ep->com, CONNECTING);
- child_ep->com.tdev = tdev;
- child_ep->com.cm_id = NULL;
- child_ep->com.local_addr.sin_family = AF_INET;
- child_ep->com.local_addr.sin_port = req->local_port;
- child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
- child_ep->com.remote_addr.sin_family = AF_INET;
- child_ep->com.remote_addr.sin_port = req->peer_port;
- child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
- get_ep(&parent_ep->com);
- child_ep->parent_ep = parent_ep;
- child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
- child_ep->l2t = l2t;
- child_ep->dst = dst;
- child_ep->hwtid = hwtid;
- timer_setup(&child_ep->timer, ep_timeout, 0);
- cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
- accept_cr(child_ep, req->peer_ip, skb);
- goto out;
-reject:
- reject_cr(tdev, hwtid, req->peer_ip, skb);
-out:
- return CPL_RET_BUF_DONE;
-}
-
-static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *ep = ctx;
- struct cpl_pass_establish *req = cplhdr(skb);
-
- pr_debug("%s ep %p\n", __func__, ep);
- ep->snd_seq = ntohl(req->snd_isn);
- ep->rcv_seq = ntohl(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);
-
- return CPL_RET_BUF_DONE;
-}
-
-static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *ep = ctx;
- struct iwch_qp_attributes attrs;
- unsigned long flags;
- int disconnect = 1;
- int release = 0;
-
- pr_debug("%s ep %p\n", __func__, ep);
- 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 iwch_accept_cr()).
- */
- __state_set(&ep->com, CLOSING);
- ep->com.rpl_done = 1;
- ep->com.rpl_err = -ECONNRESET;
- pr_debug("waking up ep %p\n", ep);
- 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;
- pr_debug("waking up ep %p\n", ep);
- wake_up(&ep->com.waitq);
- break;
- case FPDU_MODE:
- start_ep_timer(ep);
- __state_set(&ep->com, CLOSING);
- attrs.next_state = IWCH_QP_STATE_CLOSING;
- iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
- IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
- peer_close_upcall(ep);
- break;
- case ABORTING:
- disconnect = 0;
- break;
- case CLOSING:
- __state_set(&ep->com, MORIBUND);
- disconnect = 0;
- break;
- case MORIBUND:
- stop_ep_timer(ep);
- if (ep->com.cm_id && ep->com.qp) {
- attrs.next_state = IWCH_QP_STATE_IDLE;
- iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
- IWCH_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 (disconnect)
- iwch_ep_disconnect(ep, 0, GFP_KERNEL);
- if (release)
- release_ep_resources(ep);
- return CPL_RET_BUF_DONE;
-}
-
-/*
- * 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 t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct cpl_abort_req_rss *req = cplhdr(skb);
- struct iwch_ep *ep = ctx;
- struct cpl_abort_rpl *rpl;
- struct sk_buff *rpl_skb;
- struct iwch_qp_attributes attrs;
- int ret;
- int release = 0;
- unsigned long flags;
-
- if (is_neg_adv_abort(req->status)) {
- pr_debug("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
- ep->hwtid);
- t3_l2t_send_event(ep->com.tdev, ep->l2t);
- return CPL_RET_BUF_DONE;
- }
-
- /*
- * We get 2 peer aborts from the HW. The first one must
- * be ignored except for scribbling that we need one more.
- */
- if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
- return CPL_RET_BUF_DONE;
- }
-
- spin_lock_irqsave(&ep->com.lock, flags);
- pr_debug("%s ep %p state %u\n", __func__, ep, ep->com.state);
- switch (ep->com.state) {
- case CONNECTING:
- break;
- case MPA_REQ_WAIT:
- stop_ep_timer(ep);
- break;
- case MPA_REQ_SENT:
- stop_ep_timer(ep);
- connect_reply_upcall(ep, -ECONNRESET);
- break;
- case MPA_REP_SENT:
- ep->com.rpl_done = 1;
- ep->com.rpl_err = -ECONNRESET;
- pr_debug("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 iwch_accept_cr()).
- */
- ep->com.rpl_done = 1;
- ep->com.rpl_err = -ECONNRESET;
- pr_debug("waking up ep %p\n", ep);
- wake_up(&ep->com.waitq);
- break;
- case MORIBUND:
- case CLOSING:
- stop_ep_timer(ep);
- /*FALLTHROUGH*/
- case FPDU_MODE:
- if (ep->com.cm_id && ep->com.qp) {
- attrs.next_state = IWCH_QP_STATE_ERROR;
- ret = iwch_modify_qp(ep->com.qp->rhp,
- ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
- &attrs, 1);
- if (ret)
- pr_err("%s - qp <- error failed!\n", __func__);
- }
- peer_abort_upcall(ep);
- break;
- case ABORTING:
- break;
- case DEAD:
- pr_debug("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
- spin_unlock_irqrestore(&ep->com.lock, flags);
- return CPL_RET_BUF_DONE;
- 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) {
- pr_err("%s - cannot allocate skb!\n", __func__);
- release = 1;
- goto out;
- }
- rpl_skb->priority = CPL_PRIORITY_DATA;
- rpl = skb_put(rpl_skb, sizeof(*rpl));
- rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
- rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
- OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
- rpl->cmd = CPL_ABORT_NO_RST;
- iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
-out:
- if (release)
- release_ep_resources(ep);
- return CPL_RET_BUF_DONE;
-}
-
-static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *ep = ctx;
- struct iwch_qp_attributes attrs;
- unsigned long flags;
- int release = 0;
-
- pr_debug("%s ep %p\n", __func__, ep);
- 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_ep_timer(ep);
- if ((ep->com.cm_id) && (ep->com.qp)) {
- attrs.next_state = IWCH_QP_STATE_IDLE;
- iwch_modify_qp(ep->com.qp->rhp,
- ep->com.qp,
- IWCH_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 (release)
- release_ep_resources(ep);
- return CPL_RET_BUF_DONE;
-}
-
-/*
- * T3A does 3 things when a TERM is received:
- * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet
- * 2) generate an async event on the QP with the TERMINATE opcode
- * 3) post a TERMINATE opcode cqe into the associated CQ.
- *
- * For (1), we save the message in the qp for later consumer consumption.
- * For (2), we move the QP into TERMINATE, post a QP event and disconnect.
- * For (3), we toss the CQE in cxio_poll_cq().
- *
- * terminate() handles case (1)...
- */
-static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep *ep = ctx;
-
- if (state_read(&ep->com) != FPDU_MODE)
- return CPL_RET_BUF_DONE;
-
- pr_debug("%s ep %p\n", __func__, ep);
- skb_pull(skb, sizeof(struct cpl_rdma_terminate));
- pr_debug("%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 CPL_RET_BUF_DONE;
-}
-
-static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct cpl_rdma_ec_status *rep = cplhdr(skb);
- struct iwch_ep *ep = ctx;
-
- pr_debug("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
- rep->status);
- if (rep->status) {
- struct iwch_qp_attributes attrs;
-
- pr_err("%s BAD CLOSE - Aborting tid %u\n",
- __func__, ep->hwtid);
- stop_ep_timer(ep);
- attrs.next_state = IWCH_QP_STATE_ERROR;
- iwch_modify_qp(ep->com.qp->rhp,
- ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
- &attrs, 1);
- abort_connection(ep, NULL, GFP_KERNEL);
- }
- return CPL_RET_BUF_DONE;
-}
-
-static void ep_timeout(struct timer_list *t)
-{
- struct iwch_ep *ep = from_timer(ep, t, timer);
- struct iwch_qp_attributes attrs;
- unsigned long flags;
- int abort = 1;
-
- spin_lock_irqsave(&ep->com.lock, flags);
- pr_debug("%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 = IWCH_QP_STATE_ERROR;
- iwch_modify_qp(ep->com.qp->rhp,
- ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
- &attrs, 1);
- }
- __state_set(&ep->com, ABORTING);
- break;
- default:
- WARN(1, "%s unexpected state ep %p state %u\n",
- __func__, ep, ep->com.state);
- abort = 0;
- }
- spin_unlock_irqrestore(&ep->com.lock, flags);
- if (abort)
- abort_connection(ep, NULL, GFP_ATOMIC);
- put_ep(&ep->com);
-}
-
-int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
-{
- struct iwch_ep *ep = to_ep(cm_id);
-
- pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
-
- if (state_read(&ep->com) == DEAD) {
- 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 {
- send_mpa_reject(ep, pdata, pdata_len);
- iwch_ep_disconnect(ep, 0, GFP_KERNEL);
- }
- put_ep(&ep->com);
- return 0;
-}
-
-int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
-{
- int err;
- struct iwch_qp_attributes attrs;
- enum iwch_qp_attr_mask mask;
- struct iwch_ep *ep = to_ep(cm_id);
- struct iwch_dev *h = to_iwch_dev(cm_id->device);
- struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
-
- pr_debug("%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 > qp->rhp->attr.max_rdma_read_qp_depth) ||
- (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
- 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;
-
- pr_debug("%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 = 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;
-
- err = iwch_modify_qp(ep->com.qp->rhp,
- ep->com.qp, mask, &attrs, 1);
- if (err)
- goto err1;
-
- /* if needed, wait for wr_ack */
- if (iwch_rqes_posted(qp)) {
- wait_event(ep->com.waitq, ep->com.rpl_done);
- err = ep->com.rpl_err;
- 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);
- put_ep(&ep->com);
- return 0;
-err1:
- ep->com.cm_id = NULL;
- ep->com.qp = NULL;
- cm_id->rem_ref(cm_id);
-err:
- put_ep(&ep->com);
- return err;
-}
-
-static int is_loopback_dst(struct iw_cm_id *cm_id)
-{
- struct net_device *dev;
- struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
-
- dev = ip_dev_find(&init_net, raddr->sin_addr.s_addr);
- if (!dev)
- return 0;
- dev_put(dev);
- return 1;
-}
-
-int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
-{
- struct iwch_dev *h = to_iwch_dev(cm_id->device);
- struct iwch_ep *ep;
- struct rtable *rt;
- int err = 0;
- struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
- struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
-
- if (cm_id->m_remote_addr.ss_family != PF_INET) {
- err = -ENOSYS;
- goto out;
- }
-
- if (is_loopback_dst(cm_id)) {
- err = -ENOSYS;
- goto out;
- }
-
- ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
- if (!ep) {
- pr_err("%s - cannot alloc ep\n", __func__);
- err = -ENOMEM;
- goto out;
- }
- timer_setup(&ep->timer, ep_timeout, 0);
- 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;
-
- ep->com.tdev = h->rdev.t3cdev_p;
-
- cm_id->add_ref(cm_id);
- ep->com.cm_id = cm_id;
- ep->com.qp = get_qhp(h, conn_param->qpn);
- BUG_ON(!ep->com.qp);
- pr_debug("%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 = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
- if (ep->atid == -1) {
- pr_err("%s - cannot alloc atid\n", __func__);
- err = -ENOMEM;
- goto fail2;
- }
-
- /* find a route */
- rt = find_route(h->rdev.t3cdev_p, laddr->sin_addr.s_addr,
- raddr->sin_addr.s_addr, laddr->sin_port,
- raddr->sin_port, IPTOS_LOWDELAY);
- if (!rt) {
- pr_err("%s - cannot find route\n", __func__);
- err = -EHOSTUNREACH;
- goto fail3;
- }
- ep->dst = &rt->dst;
- ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst, NULL,
- &raddr->sin_addr.s_addr);
- if (!ep->l2t) {
- pr_err("%s - cannot alloc l2e\n", __func__);
- err = -ENOMEM;
- goto fail4;
- }
-
- state_set(&ep->com, CONNECTING);
- ep->tos = IPTOS_LOWDELAY;
- memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
- sizeof(ep->com.local_addr));
- memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
- sizeof(ep->com.remote_addr));
-
- /* send connect request to rnic */
- err = send_connect(ep);
- if (!err)
- goto out;
-
- l2t_release(h->rdev.t3cdev_p, ep->l2t);
-fail4:
- dst_release(ep->dst);
-fail3:
- cxgb3_free_atid(ep->com.tdev, ep->atid);
-fail2:
- cm_id->rem_ref(cm_id);
- put_ep(&ep->com);
-out:
- return err;
-}
-
-int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
-{
- int err = 0;
- struct iwch_dev *h = to_iwch_dev(cm_id->device);
- struct iwch_listen_ep *ep;
-
-
- might_sleep();
-
- if (cm_id->m_local_addr.ss_family != PF_INET) {
- err = -ENOSYS;
- goto fail1;
- }
-
- ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
- if (!ep) {
- pr_err("%s - cannot alloc ep\n", __func__);
- err = -ENOMEM;
- goto fail1;
- }
- pr_debug("%s ep %p\n", __func__, ep);
- ep->com.tdev = h->rdev.t3cdev_p;
- cm_id->add_ref(cm_id);
- ep->com.cm_id = cm_id;
- ep->backlog = backlog;
- memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
- sizeof(ep->com.local_addr));
-
- /*
- * Allocate a server TID.
- */
- ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
- if (ep->stid == -1) {
- pr_err("%s - cannot alloc atid\n", __func__);
- err = -ENOMEM;
- goto fail2;
- }
-
- state_set(&ep->com, LISTEN);
- err = listen_start(ep);
- 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:
- cxgb3_free_stid(ep->com.tdev, ep->stid);
-fail2:
- cm_id->rem_ref(cm_id);
- put_ep(&ep->com);
-fail1:
-out:
- return err;
-}
-
-int iwch_destroy_listen(struct iw_cm_id *cm_id)
-{
- int err;
- struct iwch_listen_ep *ep = to_listen_ep(cm_id);
-
- pr_debug("%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);
- cxgb3_free_stid(ep->com.tdev, ep->stid);
-done:
- err = ep->com.rpl_err;
- cm_id->rem_ref(cm_id);
- put_ep(&ep->com);
- return err;
-}
-
-int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
-{
- int ret=0;
- unsigned long flags;
- int close = 0;
- int fatal = 0;
- struct t3cdev *tdev;
- struct cxio_rdev *rdev;
-
- spin_lock_irqsave(&ep->com.lock, flags);
-
- pr_debug("%s ep %p state %s, abrupt %d\n", __func__, ep,
- states[ep->com.state], abrupt);
-
- tdev = (struct t3cdev *)ep->com.tdev;
- rdev = (struct cxio_rdev *)tdev->ulp;
- if (cxio_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_ep_timer(ep);
- }
- 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_ep_timer(ep);
- ep->com.state = ABORTING;
- } else
- ep->com.state = MORIBUND;
- }
- break;
- case MORIBUND:
- case ABORTING:
- case DEAD:
- pr_debug("%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 (close) {
- if (abrupt)
- ret = send_abort(ep, NULL, gfp);
- else
- ret = send_halfclose(ep, gfp);
- if (ret)
- fatal = 1;
- }
- if (fatal)
- release_ep_resources(ep);
- return ret;
-}
-
-int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
- struct l2t_entry *l2t)
-{
- struct iwch_ep *ep = ctx;
-
- if (ep->dst != old)
- return 0;
-
- pr_debug("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
- l2t);
- dst_hold(new);
- l2t_release(ep->com.tdev, ep->l2t);
- ep->l2t = l2t;
- dst_release(old);
- ep->dst = new;
- return 1;
-}
-
-/*
- * All the CM events are handled on a work queue to have a safe context.
- * These are the real handlers that are called from the work queue.
- */
-static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = {
- [CPL_ACT_ESTABLISH] = act_establish,
- [CPL_ACT_OPEN_RPL] = act_open_rpl,
- [CPL_RX_DATA] = rx_data,
- [CPL_TX_DMA_ACK] = tx_ack,
- [CPL_ABORT_RPL_RSS] = abort_rpl,
- [CPL_ABORT_RPL] = abort_rpl,
- [CPL_PASS_OPEN_RPL] = pass_open_rpl,
- [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
- [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
- [CPL_PASS_ESTABLISH] = pass_establish,
- [CPL_PEER_CLOSE] = peer_close,
- [CPL_ABORT_REQ_RSS] = peer_abort,
- [CPL_CLOSE_CON_RPL] = close_con_rpl,
- [CPL_RDMA_TERMINATE] = terminate,
- [CPL_RDMA_EC_STATUS] = ec_status,
-};
-
-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 DECLARE_WORK(skb_work, process_work);
-
-static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct iwch_ep_common *epc = ctx;
-
- get_ep(epc);
-
- /*
- * Save ctx and tdev in the skb->cb area.
- */
- *((void **) skb->cb) = ctx;
- *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
-
- /*
- * 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 t3cdev *tdev, struct sk_buff *skb, void *ctx)
-{
- struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
-
- if (rpl->status != CPL_ERR_NONE) {
- pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
- rpl->status, GET_TID(rpl));
- }
- return CPL_RET_BUF_DONE;
-}
-
-/*
- * All upcalls from the T3 Core go to sched() to schedule the
- * processing on a work queue.
- */
-cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = {
- [CPL_ACT_ESTABLISH] = sched,
- [CPL_ACT_OPEN_RPL] = sched,
- [CPL_RX_DATA] = sched,
- [CPL_TX_DMA_ACK] = sched,
- [CPL_ABORT_RPL_RSS] = sched,
- [CPL_ABORT_RPL] = sched,
- [CPL_PASS_OPEN_RPL] = sched,
- [CPL_CLOSE_LISTSRV_RPL] = sched,
- [CPL_PASS_ACCEPT_REQ] = sched,
- [CPL_PASS_ESTABLISH] = sched,
- [CPL_PEER_CLOSE] = sched,
- [CPL_CLOSE_CON_RPL] = sched,
- [CPL_ABORT_REQ_RSS] = sched,
- [CPL_RDMA_TERMINATE] = sched,
- [CPL_RDMA_EC_STATUS] = sched,
- [CPL_SET_TCB_RPL] = set_tcb_rpl,
-};
-
-int __init iwch_cm_init(void)
-{
- skb_queue_head_init(&rxq);
-
- workq = alloc_ordered_workqueue("iw_cxgb3", WQ_MEM_RECLAIM);
- if (!workq)
- return -ENOMEM;
-
- return 0;
-}
-
-void __exit iwch_cm_term(void)
-{
- flush_workqueue(workq);
- destroy_workqueue(workq);
-}