RDS: Add iWARP support

[safe/jmp/linux-2.6] / net / rds / iw_stats.c

diff --git a/net/rds/iw_stats.c b/net/rds/iw_stats.c
new file mode 100644 (file)
index 0000000..ccc7e8f
--- /dev/null
+++ b/net/rds/iw_stats.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2006 Oracle.  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/percpu.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+
+#include "rds.h"
+#include "iw.h"
+
+DEFINE_PER_CPU(struct rds_iw_statistics, rds_iw_stats) ____cacheline_aligned;
+
+static char *rds_iw_stat_names[] = {
+       "iw_connect_raced",
+       "iw_listen_closed_stale",
+       "iw_tx_cq_call",
+       "iw_tx_cq_event",
+       "iw_tx_ring_full",
+       "iw_tx_throttle",
+       "iw_tx_sg_mapping_failure",
+       "iw_tx_stalled",
+       "iw_tx_credit_updates",
+       "iw_rx_cq_call",
+       "iw_rx_cq_event",
+       "iw_rx_ring_empty",
+       "iw_rx_refill_from_cq",
+       "iw_rx_refill_from_thread",
+       "iw_rx_alloc_limit",
+       "iw_rx_credit_updates",
+       "iw_ack_sent",
+       "iw_ack_send_failure",
+       "iw_ack_send_delayed",
+       "iw_ack_send_piggybacked",
+       "iw_ack_received",
+       "iw_rdma_mr_alloc",
+       "iw_rdma_mr_free",
+       "iw_rdma_mr_used",
+       "iw_rdma_mr_pool_flush",
+       "iw_rdma_mr_pool_wait",
+       "iw_rdma_mr_pool_depleted",
+};
+
+unsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter,
+                                   unsigned int avail)
+{
+       struct rds_iw_statistics stats = {0, };
+       uint64_t *src;
+       uint64_t *sum;
+       size_t i;
+       int cpu;
+
+       if (avail < ARRAY_SIZE(rds_iw_stat_names))
+               goto out;
+
+       for_each_online_cpu(cpu) {
+               src = (uint64_t *)&(per_cpu(rds_iw_stats, cpu));
+               sum = (uint64_t *)&stats;
+               for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
+                       *(sum++) += *(src++);
+       }
+
+       rds_stats_info_copy(iter, (uint64_t *)&stats, rds_iw_stat_names,
+                           ARRAY_SIZE(rds_iw_stat_names));
+out:
+       return ARRAY_SIZE(rds_iw_stat_names);
+}