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Message-ID: <20080519103228.12355.9952.stgit@localhost.localdomain>
Date: Mon, 19 May 2008 16:02:28 +0530
From: Ramachandra K <ramachandra.kuchimanchi@...gic.com>
To: rdreier@...co.com, general@...ts.openfabrics.org,
netdev@...r.kernel.org
Cc: amar.mudrankit@...gic.com, poornima.kamath@...gic.com
Subject: [PATCH v2 02/13] QLogic VNIC: Netpath - abstraction of connection to
EVIC/VEx
From: Ramachandra K <ramachandra.kuchimanchi@...gic.com>
This patch implements the netpath layer of QLogic VNIC. Netpath is an
abstraction of a connection to EVIC. It primarily includes the
implementation which maintains the timers to monitor the status of
the connection to EVIC/VEx.
Signed-off-by: Ramachandra K <ramachandra.kuchimanchi@...gic.com>
Signed-off-by: Poornima Kamath <poornima.kamath@...gic.com>
Signed-off-by: Amar Mudrankit <amar.mudrankit@...gic.com>
---
drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.c | 112 +++++++++++++++++++++++
drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.h | 79 ++++++++++++++++
2 files changed, 191 insertions(+), 0 deletions(-)
create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.c
create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.h
diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.c b/drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.c
new file mode 100644
index 0000000..820b996
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2006 QLogic, 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/netdevice.h>
+#include <linux/skbuff.h>
+
+#include "vnic_util.h"
+#include "vnic_main.h"
+#include "vnic_viport.h"
+#include "vnic_netpath.h"
+
+static void vnic_npevent_timeout(unsigned long data)
+{
+ struct netpath *netpath = (struct netpath *)data;
+
+ if (netpath->second_bias)
+ vnic_npevent_queue_evt(netpath, VNIC_SECNP_TIMEREXPIRED);
+ else
+ vnic_npevent_queue_evt(netpath, VNIC_PRINP_TIMEREXPIRED);
+}
+
+void netpath_timer(struct netpath *netpath, int timeout)
+{
+ if (netpath->timer_state == NETPATH_TS_ACTIVE)
+ del_timer_sync(&netpath->timer);
+ if (timeout) {
+ init_timer(&netpath->timer);
+ netpath->timer_state = NETPATH_TS_ACTIVE;
+ netpath->timer.expires = jiffies + timeout;
+ netpath->timer.data = (unsigned long)netpath;
+ netpath->timer.function = vnic_npevent_timeout;
+ add_timer(&netpath->timer);
+ } else
+ vnic_npevent_timeout((unsigned long)netpath);
+}
+
+void netpath_timer_stop(struct netpath *netpath)
+{
+ if (netpath->timer_state != NETPATH_TS_ACTIVE)
+ return;
+ del_timer_sync(&netpath->timer);
+ if (netpath->second_bias)
+ vnic_npevent_dequeue_evt(netpath, VNIC_SECNP_TIMEREXPIRED);
+ else
+ vnic_npevent_dequeue_evt(netpath, VNIC_PRINP_TIMEREXPIRED);
+
+ netpath->timer_state = NETPATH_TS_IDLE;
+}
+
+void netpath_free(struct netpath *netpath)
+{
+ if (!netpath->viport)
+ return;
+ viport_free(netpath->viport);
+ netpath->viport = NULL;
+ sysfs_remove_group(&netpath->dev_info.dev.kobj,
+ &vnic_path_attr_group);
+ device_unregister(&netpath->dev_info.dev);
+ wait_for_completion(&netpath->dev_info.released);
+}
+
+void netpath_init(struct netpath *netpath, struct vnic *vnic,
+ int second_bias)
+{
+ netpath->parent = vnic;
+ netpath->carrier = 0;
+ netpath->viport = NULL;
+ netpath->second_bias = second_bias;
+ netpath->timer_state = NETPATH_TS_IDLE;
+ init_timer(&netpath->timer);
+}
+
+const char *netpath_to_string(struct vnic *vnic, struct netpath *netpath)
+{
+ if (!netpath)
+ return "NULL";
+ else if (netpath == &vnic->primary_path)
+ return "PRIMARY";
+ else if (netpath == &vnic->secondary_path)
+ return "SECONDARY";
+ else
+ return "UNKNOWN";
+}
diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.h b/drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.h
new file mode 100644
index 0000000..f4e142e
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_netpath.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2006 QLogic, 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.
+ */
+
+#ifndef VNIC_NETPATH_H_INCLUDED
+#define VNIC_NETPATH_H_INCLUDED
+
+#include <linux/spinlock.h>
+
+#include "vnic_sys.h"
+
+struct viport;
+struct vnic;
+
+enum netpath_ts {
+ NETPATH_TS_IDLE = 0,
+ NETPATH_TS_ACTIVE = 1,
+ NETPATH_TS_EXPIRED = 2
+};
+
+struct netpath {
+ int carrier;
+ struct vnic *parent;
+ struct viport *viport;
+ size_t path_idx;
+ unsigned long connect_time;
+ int second_bias;
+ u8 is_primary_path;
+ u8 delay_reconnect;
+ struct timer_list timer;
+ enum netpath_ts timer_state;
+ struct dev_info dev_info;
+};
+
+void netpath_init(struct netpath *netpath, struct vnic *vnic,
+ int second_bias);
+void netpath_free(struct netpath *netpath);
+
+void netpath_timer(struct netpath *netpath, int timeout);
+void netpath_timer_stop(struct netpath *netpath);
+
+const char *netpath_to_string(struct vnic *vnic, struct netpath *netpath);
+
+#define netpath_get_hw_addr(netpath, address) \
+ viport_get_hw_addr((netpath)->viport, address)
+#define netpath_is_connected(netpath) \
+ (netpath->state == NETPATH_CONNECTED)
+#define netpath_can_tx_csum(netpath) \
+ viport_can_tx_csum(netpath->viport)
+
+#endif /* VNIC_NETPATH_H_INCLUDED */
--
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