cxgb3 gfp_t annotations
[linux-2.6.git] / drivers / net / cxgb3 / cxgb3_offload.c
index c6b7266..e620ed4 100644 (file)
@@ -1,6 +1,5 @@
 /*
  * Copyright (c) 2006-2007 Chelsio, Inc. All rights reserved.
- * Copyright (c) 2006-2007 Open Grid Computing, Inc. All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -161,14 +160,16 @@ static struct net_device *get_iff_from_mac(struct adapter *adapter,
        int i;
 
        for_each_port(adapter, i) {
-               const struct vlan_group *grp;
+               struct vlan_group *grp;
                struct net_device *dev = adapter->port[i];
                const struct port_info *p = netdev_priv(dev);
 
                if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
                        if (vlan && vlan != VLAN_VID_MASK) {
                                grp = p->vlan_grp;
-                               dev = grp ? grp->vlan_devices[vlan] : NULL;
+                               dev = NULL;
+                               if (grp)
+                                       dev = vlan_group_get_device(grp, vlan);
                        } else
                                while (dev->master)
                                        dev = dev->master;
@@ -507,6 +508,7 @@ void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 
        spin_lock_bh(&td->tid_release_lock);
        p->ctx = (void *)td->tid_release_list;
+       p->client = NULL;
        td->tid_release_list = p;
        if (!p->ctx)
                schedule_work(&td->tid_release_task);
@@ -552,7 +554,9 @@ int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
        struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 
        spin_lock_bh(&t->atid_lock);
-       if (t->afree) {
+       if (t->afree &&
+           t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
+           t->ntids) {
                union active_open_entry *p = t->afree;
 
                atid = (p - t->atid_tab) + t->atid_base;
@@ -620,7 +624,8 @@ static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
        struct t3c_tid_entry *t3c_tid;
 
        t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
-       if (t3c_tid->ctx && t3c_tid->client && t3c_tid->client->handlers &&
+       if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
+           t3c_tid->client->handlers &&
            t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
                return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
                                                                    t3c_tid->
@@ -639,7 +644,7 @@ static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
        struct t3c_tid_entry *t3c_tid;
 
        t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
-       if (t3c_tid->ctx && t3c_tid->client->handlers &&
+       if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
            t3c_tid->client->handlers[p->opcode]) {
                return t3c_tid->client->handlers[p->opcode] (dev, skb,
                                                             t3c_tid->ctx);
@@ -657,7 +662,7 @@ static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
        struct t3c_tid_entry *t3c_tid;
 
        t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
-       if (t3c_tid->ctx && t3c_tid->client->handlers &&
+       if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
            t3c_tid->client->handlers[p->opcode]) {
                return t3c_tid->client->handlers[p->opcode]
                    (dev, skb, t3c_tid->ctx);
@@ -686,6 +691,28 @@ static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
        }
 }
 
+/*
+ * Returns an sk_buff for a reply CPL message of size len.  If the input
+ * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
+ * is allocated.  The input skb must be of size at least len.  Note that this
+ * operation does not destroy the original skb data even if it decides to reuse
+ * the buffer.
+ */
+static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
+                                              gfp_t gfp)
+{
+       if (likely(!skb_cloned(skb))) {
+               BUG_ON(skb->len < len);
+               __skb_trim(skb, len);
+               skb_get(skb);
+       } else {
+               skb = alloc_skb(len, gfp);
+               if (skb)
+                       __skb_put(skb, len);
+       }
+       return skb;
+}
+
 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 {
        union opcode_tid *p = cplhdr(skb);
@@ -693,30 +720,39 @@ static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
        struct t3c_tid_entry *t3c_tid;
 
        t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
-       if (t3c_tid->ctx && t3c_tid->client->handlers &&
+       if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
            t3c_tid->client->handlers[p->opcode]) {
                return t3c_tid->client->handlers[p->opcode]
                    (dev, skb, t3c_tid->ctx);
        } else {
                struct cpl_abort_req_rss *req = cplhdr(skb);
                struct cpl_abort_rpl *rpl;
+               struct sk_buff *reply_skb;
+               unsigned int tid = GET_TID(req);
+               u8 cmd = req->status;
+
+               if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
+                   req->status == CPL_ERR_PERSIST_NEG_ADVICE)
+                       goto out;
 
-               struct sk_buff *skb =
-                   alloc_skb(sizeof(struct cpl_abort_rpl), GFP_ATOMIC);
-               if (!skb) {
+               reply_skb = cxgb3_get_cpl_reply_skb(skb,
+                                                   sizeof(struct
+                                                          cpl_abort_rpl),
+                                                   GFP_ATOMIC);
+
+               if (!reply_skb) {
                        printk("do_abort_req_rss: couldn't get skb!\n");
                        goto out;
                }
-               skb->priority = CPL_PRIORITY_DATA;
-               __skb_put(skb, sizeof(struct cpl_abort_rpl));
-               rpl = cplhdr(skb);
+               reply_skb->priority = CPL_PRIORITY_DATA;
+               __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
+               rpl = cplhdr(reply_skb);
                rpl->wr.wr_hi =
                    htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
-               rpl->wr.wr_lo = htonl(V_WR_TID(GET_TID(req)));
-               OPCODE_TID(rpl) =
-                   htonl(MK_OPCODE_TID(CPL_ABORT_RPL, GET_TID(req)));
-               rpl->cmd = req->status;
-               cxgb3_ofld_send(dev, skb);
+               rpl->wr.wr_lo = htonl(V_WR_TID(tid));
+               OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
+               rpl->cmd = cmd;
+               cxgb3_ofld_send(dev, reply_skb);
 out:
                return CPL_RET_BUF_DONE;
        }
@@ -729,7 +765,7 @@ static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
        struct t3c_tid_entry *t3c_tid;
 
        t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
-       if (t3c_tid->ctx && t3c_tid->client->handlers &&
+       if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
            t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
                return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
                    (dev, skb, t3c_tid->ctx);
@@ -740,17 +776,6 @@ static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
        }
 }
 
-static int do_set_tcb_rpl(struct t3cdev *dev, struct sk_buff *skb)
-{
-       struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
-
-       if (rpl->status != CPL_ERR_NONE)
-               printk(KERN_ERR
-                      "Unexpected SET_TCB_RPL status %u for tid %u\n",
-                      rpl->status, GET_TID(rpl));
-       return CPL_RET_BUF_DONE;
-}
-
 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 {
        struct cpl_trace_pkt *p = cplhdr(skb);
@@ -758,7 +783,7 @@ static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
        skb->protocol = htons(0xffff);
        skb->dev = dev->lldev;
        skb_pull(skb, sizeof(*p));
-       skb->mac.raw = skb->data;
+       skb_reset_mac_header(skb);
        netif_receive_skb(skb);
        return 0;
 }
@@ -770,7 +795,7 @@ static int do_term(struct t3cdev *dev, struct sk_buff *skb)
        struct t3c_tid_entry *t3c_tid;
 
        t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
-       if (t3c_tid->ctx && t3c_tid->client->handlers &&
+       if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
            t3c_tid->client->handlers[opcode]) {
                return t3c_tid->client->handlers[opcode] (dev, skb,
                                                          t3c_tid->ctx);
@@ -969,7 +994,7 @@ void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
        for (tid = 0; tid < ti->ntids; tid++) {
                te = lookup_tid(ti, tid);
                BUG_ON(!te);
-               if (te->ctx && te->client && te->client->redirect) {
+               if (te && te->ctx && te->client && te->client->redirect) {
                        update_tcb = te->client->redirect(te->ctx, old, new, e);
                        if (update_tcb) {
                                l2t_hold(L2DATA(tdev), e);
@@ -1212,7 +1237,8 @@ void __init cxgb3_offload_init(void)
        t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
        t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
        t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
-       t3_register_cpl_handler(CPL_SET_TCB_RPL, do_set_tcb_rpl);
+       t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
+       t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
        t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
        t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
        t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);