Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
[pandora-kernel.git] / drivers / scsi / fcoe / libfcoe.c
index 3440da4..50aaa4b 100644 (file)
@@ -51,7 +51,7 @@ MODULE_LICENSE("GPL v2");
 #define        FCOE_CTLR_DEF_FKA       FIP_DEF_FKA     /* default keep alive (mS) */
 
 static void fcoe_ctlr_timeout(unsigned long);
-static void fcoe_ctlr_link_work(struct work_struct *);
+static void fcoe_ctlr_timer_work(struct work_struct *);
 static void fcoe_ctlr_recv_work(struct work_struct *);
 
 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
@@ -116,7 +116,7 @@ void fcoe_ctlr_init(struct fcoe_ctlr *fip)
        spin_lock_init(&fip->lock);
        fip->flogi_oxid = FC_XID_UNKNOWN;
        setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
-       INIT_WORK(&fip->link_work, fcoe_ctlr_link_work);
+       INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work);
        INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
        skb_queue_head_init(&fip->fip_recv_list);
 }
@@ -164,7 +164,7 @@ void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
        fcoe_ctlr_reset_fcfs(fip);
        spin_unlock_bh(&fip->lock);
        del_timer_sync(&fip->timer);
-       cancel_work_sync(&fip->link_work);
+       cancel_work_sync(&fip->timer_work);
 }
 EXPORT_SYMBOL(fcoe_ctlr_destroy);
 
@@ -257,14 +257,10 @@ void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
 {
        spin_lock_bh(&fip->lock);
        if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
-               fip->last_link = 1;
-               fip->link = 1;
                spin_unlock_bh(&fip->lock);
                fc_linkup(fip->lp);
        } else if (fip->state == FIP_ST_LINK_WAIT) {
                fip->state = fip->mode;
-               fip->last_link = 1;
-               fip->link = 1;
                spin_unlock_bh(&fip->lock);
                if (fip->state == FIP_ST_AUTO)
                        LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
@@ -306,9 +302,7 @@ int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
        LIBFCOE_FIP_DBG(fip, "link down.\n");
        spin_lock_bh(&fip->lock);
        fcoe_ctlr_reset(fip);
-       link_dropped = fip->link;
-       fip->link = 0;
-       fip->last_link = 0;
+       link_dropped = fip->state != FIP_ST_LINK_WAIT;
        fip->state = FIP_ST_LINK_WAIT;
        spin_unlock_bh(&fip->lock);
 
@@ -349,7 +343,7 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
 
        fcf = fip->sel_fcf;
        lp = fip->lp;
-       if (!fcf || !fc_host_port_id(lp->host))
+       if (!fcf || !lp->port_id)
                return;
 
        len = sizeof(*kal) + ports * sizeof(*vn);
@@ -380,8 +374,8 @@ static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
                vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
                vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
                memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
-               hton24(vn->fd_fc_id, fc_host_port_id(lp->host));
-               put_unaligned_be64(lp->wwpn, &vn->fd_wwpn);
+               hton24(vn->fd_fc_id, lport->port_id);
+               put_unaligned_be64(lport->wwpn, &vn->fd_wwpn);
        }
        skb_put(skb, len);
        skb->protocol = htons(ETH_P_FIP);
@@ -445,13 +439,18 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
        cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
 
        mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
-       memset(mac, 0, sizeof(mac));
+       memset(mac, 0, sizeof(*mac));
        mac->fd_desc.fip_dtype = FIP_DT_MAC;
        mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
-       if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC)
+       if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) {
                memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
-       else if (fip->spma)
+       } else if (fip_flags & FIP_FL_SPMA) {
+               LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n");
                memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
+       } else {
+               LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n");
+               /* FPMA only FLOGI must leave the MAC desc set to all 0s */
+       }
 
        skb->protocol = htons(ETH_P_FIP);
        skb_reset_mac_header(skb);
@@ -556,7 +555,7 @@ EXPORT_SYMBOL(fcoe_ctlr_els_send);
  * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
  * @fip: The FCoE controller to free FCFs on
  *
- * Called with lock held.
+ * Called with lock held and preemption disabled.
  *
  * An FCF is considered old if we have missed three advertisements.
  * That is, there have been no valid advertisement from it for three
@@ -573,17 +572,20 @@ static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
        struct fcoe_fcf *next;
        unsigned long sel_time = 0;
        unsigned long mda_time = 0;
+       struct fcoe_dev_stats *stats;
 
        list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
                mda_time = fcf->fka_period + (fcf->fka_period >> 1);
                if ((fip->sel_fcf == fcf) &&
                    (time_after(jiffies, fcf->time + mda_time))) {
                        mod_timer(&fip->timer, jiffies + mda_time);
-                       fc_lport_get_stats(fip->lp)->MissDiscAdvCount++;
+                       stats = per_cpu_ptr(fip->lp->dev_stats,
+                                           smp_processor_id());
+                       stats->MissDiscAdvCount++;
                        printk(KERN_INFO "libfcoe: host%d: Missing Discovery "
-                              "Advertisement for fab %llx count %lld\n",
+                              "Advertisement for fab %16.16llx count %lld\n",
                               fip->lp->host->host_no, fcf->fabric_name,
-                              fc_lport_get_stats(fip->lp)->MissDiscAdvCount);
+                              stats->MissDiscAdvCount);
                }
                if (time_after(jiffies, fcf->time + fcf->fka_period * 3 +
                               msecs_to_jiffies(FIP_FCF_FUZZ * 3))) {
@@ -593,7 +595,9 @@ static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
                        WARN_ON(!fip->fcf_count);
                        fip->fcf_count--;
                        kfree(fcf);
-                       fc_lport_get_stats(fip->lp)->VLinkFailureCount++;
+                       stats = per_cpu_ptr(fip->lp->dev_stats,
+                                           smp_processor_id());
+                       stats->VLinkFailureCount++;
                } else if (fcoe_ctlr_mtu_valid(fcf) &&
                           (!sel_time || time_before(sel_time, fcf->time))) {
                        sel_time = fcf->time;
@@ -776,7 +780,8 @@ static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
        mtu_valid = fcoe_ctlr_mtu_valid(fcf);
        fcf->time = jiffies;
        if (!found) {
-               LIBFCOE_FIP_DBG(fip, "New FCF for fab %llx map %x val %d\n",
+               LIBFCOE_FIP_DBG(fip, "New FCF for fab %16.16llx "
+                               "map %x val %d\n",
                                fcf->fabric_name, fcf->fc_map, mtu_valid);
        }
 
@@ -906,9 +911,10 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
        fr_eof(fp) = FC_EOF_T;
        fr_dev(fp) = lport;
 
-       stats = fc_lport_get_stats(lport);
+       stats = per_cpu_ptr(lport->dev_stats, get_cpu());
        stats->RxFrames++;
        stats->RxWords += skb->len / FIP_BPW;
+       put_cpu();
 
        fc_exch_recv(lport, fp);
        return;
@@ -942,9 +948,8 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
        u32     desc_mask;
 
        LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
-       if (!fcf)
-               return;
-       if (!fcf || !fc_host_port_id(lport->host))
+
+       if (!fcf || !lport->port_id)
                return;
 
        /*
@@ -982,8 +987,7 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
                        if (compare_ether_addr(vp->fd_mac,
                                               fip->get_src_addr(lport)) == 0 &&
                            get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn &&
-                           ntoh24(vp->fd_fc_id) ==
-                           fc_host_port_id(lport->host))
+                           ntoh24(vp->fd_fc_id) == lport->port_id)
                                desc_mask &= ~BIT(FIP_DT_VN_ID);
                        break;
                default:
@@ -1006,7 +1010,8 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
                LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
 
                spin_lock_bh(&fip->lock);
-               fc_lport_get_stats(lport)->VLinkFailureCount++;
+               per_cpu_ptr(lport->dev_stats,
+                           smp_processor_id())->VLinkFailureCount++;
                fcoe_ctlr_reset(fip);
                spin_unlock_bh(&fip->lock);
 
@@ -1102,15 +1107,17 @@ static void fcoe_ctlr_select(struct fcoe_ctlr *fip)
        struct fcoe_fcf *best = NULL;
 
        list_for_each_entry(fcf, &fip->fcfs, list) {
-               LIBFCOE_FIP_DBG(fip, "consider FCF for fab %llx VFID %d map %x "
-                               "val %d\n", fcf->fabric_name, fcf->vfid,
+               LIBFCOE_FIP_DBG(fip, "consider FCF for fab %16.16llx "
+                               "VFID %d map %x val %d\n",
+                               fcf->fabric_name, fcf->vfid,
                                fcf->fc_map, fcoe_ctlr_mtu_valid(fcf));
                if (!fcoe_ctlr_fcf_usable(fcf)) {
-                       LIBFCOE_FIP_DBG(fip, "FCF for fab %llx map %x %svalid "
-                                       "%savailable\n", fcf->fabric_name,
-                                       fcf->fc_map, (fcf->flags & FIP_FL_SOL)
-                                       ? "" : "in", (fcf->flags & FIP_FL_AVAIL)
-                                       ? "" : "un");
+                       LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
+                                       "map %x %svalid %savailable\n",
+                                       fcf->fabric_name, fcf->fc_map,
+                                       (fcf->flags & FIP_FL_SOL) ? "" : "in",
+                                       (fcf->flags & FIP_FL_AVAIL) ?
+                                       "" : "un");
                        continue;
                }
                if (!best) {
@@ -1175,7 +1182,7 @@ static void fcoe_ctlr_timeout(unsigned long arg)
                               "Starting FCF discovery.\n",
                               fip->lp->host->host_no);
                        fip->reset_req = 1;
-                       schedule_work(&fip->link_work);
+                       schedule_work(&fip->timer_work);
                }
        }
 
@@ -1201,43 +1208,31 @@ static void fcoe_ctlr_timeout(unsigned long arg)
                mod_timer(&fip->timer, next_timer);
        }
        if (fip->send_ctlr_ka || fip->send_port_ka)
-               schedule_work(&fip->link_work);
+               schedule_work(&fip->timer_work);
        spin_unlock_bh(&fip->lock);
 }
 
 /**
- * fcoe_ctlr_link_work() - Worker thread function for link changes
+ * fcoe_ctlr_timer_work() - Worker thread function for timer work
  * @work: Handle to a FCoE controller
  *
- * See if the link status has changed and if so, report it.
- *
- * This is here because fc_linkup() and fc_linkdown() must not
+ * Sends keep-alives and resets which must not
  * be called from the timer directly, since they use a mutex.
  */
-static void fcoe_ctlr_link_work(struct work_struct *work)
+static void fcoe_ctlr_timer_work(struct work_struct *work)
 {
        struct fcoe_ctlr *fip;
        struct fc_lport *vport;
        u8 *mac;
-       int link;
-       int last_link;
        int reset;
 
-       fip = container_of(work, struct fcoe_ctlr, link_work);
+       fip = container_of(work, struct fcoe_ctlr, timer_work);
        spin_lock_bh(&fip->lock);
-       last_link = fip->last_link;
-       link = fip->link;
-       fip->last_link = link;
        reset = fip->reset_req;
        fip->reset_req = 0;
        spin_unlock_bh(&fip->lock);
 
-       if (last_link != link) {
-               if (link)
-                       fc_linkup(fip->lp);
-               else
-                       fc_linkdown(fip->lp);
-       } else if (reset && link)
+       if (reset)
                fc_lport_reset(fip->lp);
 
        if (fip->send_ctlr_ka) {
@@ -1334,9 +1329,9 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
                if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
                        memcpy(fip->dest_addr, sa, ETH_ALEN);
                        fip->map_dest = 0;
-                       if (fip->state == FIP_ST_NON_FIP)
-                               LIBFCOE_FIP_DBG(fip, "received FLOGI REQ, "
-                                               "using non-FIP mode\n");
+                       if (fip->state == FIP_ST_AUTO)
+                               LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
+                                               "Setting non-FIP mode\n");
                        fip->state = FIP_ST_NON_FIP;
                }
                spin_unlock_bh(&fip->lock);