diff options
Diffstat (limited to 'drivers/infiniband/hw/cxgb3/iwch_cm.c')
| -rw-r--r-- | drivers/infiniband/hw/cxgb3/iwch_cm.c | 2258 |
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); -} |