RDMA/cxgb3: Add support for protocol statistics

- Add a new rdma ctl command called RDMA_GET_MIB to the cxgb3 low
  level driver to obtain the protocol mib from the rnic hardware.

- Add new iw_cxgb3 provider method to get the MIB from the low level
  driver.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

3 files changed, 66 insertions, 4 deletions

diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index 5f4380657392..18a6609f5e01 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -56,6 +56,7 @@
 #include "iwch_provider.h"
 #include "iwch_cm.h"
 #include "iwch_user.h"
+#include "common.h"
 
 static int iwch_modify_port(struct ib_device *ibdev,
                             u8 port, int port_modify_mask,
@@ -1245,6 +1246,61 @@ static ssize_t show_board(struct device *dev, struct device_attribute *attr,
                        iwch_dev->rdev.rnic_info.pdev->device);
 }
 
+static int iwch_get_mib(struct ib_device *ibdev,
+                        union rdma_protocol_stats *stats)
+{
+        struct iwch_dev *dev;
+        struct tp_mib_stats m;
+        int ret;
+
+        PDBG("%s ibdev %p\n", __func__, ibdev);
+        dev = to_iwch_dev(ibdev);
+        ret = dev->rdev.t3cdev_p->ctl(dev->rdev.t3cdev_p, RDMA_GET_MIB, &m);
+        if (ret)
+                return -ENOSYS;
+
+        memset(stats, 0, sizeof *stats);
+        stats->iw.ipInReceives = ((u64) m.ipInReceive_hi << 32) +
+                                m.ipInReceive_lo;
+        stats->iw.ipInHdrErrors = ((u64) m.ipInHdrErrors_hi << 32) +
+                                  m.ipInHdrErrors_lo;
+        stats->iw.ipInAddrErrors = ((u64) m.ipInAddrErrors_hi << 32) +
+                                   m.ipInAddrErrors_lo;
+        stats->iw.ipInUnknownProtos = ((u64) m.ipInUnknownProtos_hi << 32) +
+                                      m.ipInUnknownProtos_lo;
+        stats->iw.ipInDiscards = ((u64) m.ipInDiscards_hi << 32) +
+                                 m.ipInDiscards_lo;
+        stats->iw.ipInDelivers = ((u64) m.ipInDelivers_hi << 32) +
+                                 m.ipInDelivers_lo;
+        stats->iw.ipOutRequests = ((u64) m.ipOutRequests_hi << 32) +
+                                  m.ipOutRequests_lo;
+        stats->iw.ipOutDiscards = ((u64) m.ipOutDiscards_hi << 32) +
+                                  m.ipOutDiscards_lo;
+        stats->iw.ipOutNoRoutes = ((u64) m.ipOutNoRoutes_hi << 32) +
+                                  m.ipOutNoRoutes_lo;
+        stats->iw.ipReasmTimeout = (u64) m.ipReasmTimeout;
+        stats->iw.ipReasmReqds = (u64) m.ipReasmReqds;
+        stats->iw.ipReasmOKs = (u64) m.ipReasmOKs;
+        stats->iw.ipReasmFails = (u64) m.ipReasmFails;
+        stats->iw.tcpActiveOpens = (u64) m.tcpActiveOpens;
+        stats->iw.tcpPassiveOpens = (u64) m.tcpPassiveOpens;
+        stats->iw.tcpAttemptFails = (u64) m.tcpAttemptFails;
+        stats->iw.tcpEstabResets = (u64) m.tcpEstabResets;
+        stats->iw.tcpOutRsts = (u64) m.tcpOutRsts;
+        stats->iw.tcpCurrEstab = (u64) m.tcpCurrEstab;
+        stats->iw.tcpInSegs = ((u64) m.tcpInSegs_hi << 32) +
+                              m.tcpInSegs_lo;
+        stats->iw.tcpOutSegs = ((u64) m.tcpOutSegs_hi << 32) +
+                               m.tcpOutSegs_lo;
+        stats->iw.tcpRetransSegs = ((u64) m.tcpRetransSeg_hi << 32) +
+                                  m.tcpRetransSeg_lo;
+        stats->iw.tcpInErrs = ((u64) m.tcpInErrs_hi << 32) +
+                              m.tcpInErrs_lo;
+        stats->iw.tcpRtoMin = (u64) m.tcpRtoMin;
+        stats->iw.tcpRtoMax = (u64) m.tcpRtoMax;
+        return 0;
+}
+
 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
@@ -1254,7 +1310,7 @@ static struct device_attribute *iwch_class_attributes[] = {
         &dev_attr_hw_rev,
         &dev_attr_fw_ver,
         &dev_attr_hca_type,
-        &dev_attr_board_id
+        &dev_attr_board_id,
 };
 
 int iwch_register_device(struct iwch_dev *dev)
@@ -1325,15 +1381,13 @@ int iwch_register_device(struct iwch_dev *dev)
         dev->ibdev.alloc_fast_reg_mr = iwch_alloc_fast_reg_mr;
         dev->ibdev.alloc_fast_reg_page_list = iwch_alloc_fastreg_pbl;
         dev->ibdev.free_fast_reg_page_list = iwch_free_fastreg_pbl;
-
         dev->ibdev.attach_mcast = iwch_multicast_attach;
         dev->ibdev.detach_mcast = iwch_multicast_detach;
         dev->ibdev.process_mad = iwch_process_mad;
-
         dev->ibdev.req_notify_cq = iwch_arm_cq;
         dev->ibdev.post_send = iwch_post_send;
         dev->ibdev.post_recv = iwch_post_receive;
-
+        dev->ibdev.get_protocol_stats = iwch_get_mib;
 
         dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
         if (!dev->ibdev.iwcm)
diff --git a/drivers/net/cxgb3/cxgb3_ctl_defs.h b/drivers/net/cxgb3/cxgb3_ctl_defs.h
index 6c4f32066919..ed0ecd9679cb 100644
--- a/drivers/net/cxgb3/cxgb3_ctl_defs.h
+++ b/drivers/net/cxgb3/cxgb3_ctl_defs.h
@@ -54,6 +54,7 @@ enum {
         RDMA_CQ_DISABLE         = 16,
         RDMA_CTRL_QP_SETUP      = 17,
         RDMA_GET_MEM            = 18,
+        RDMA_GET_MIB            = 19,
 
         GET_RX_PAGE_INFO        = 50,
 };
diff --git a/drivers/net/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c
index ff9c013ce535..cf2696873796 100644
--- a/drivers/net/cxgb3/cxgb3_offload.c
+++ b/drivers/net/cxgb3/cxgb3_offload.c
@@ -303,6 +303,12 @@ static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
                 spin_unlock_irq(&adapter->sge.reg_lock);
                 break;
         }
+        case RDMA_GET_MIB: {
+                spin_lock(&adapter->stats_lock);
+                t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
+                spin_unlock(&adapter->stats_lock);
+                break;
+        }
         default:
                 ret = -EOPNOTSUPP;
         }
@@ -381,6 +387,7 @@ static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
         case RDMA_CQ_DISABLE:
         case RDMA_CTRL_QP_SETUP:
         case RDMA_GET_MEM:
+        case RDMA_GET_MIB:
                 if (!offload_running(adapter))
                         return -EAGAIN;
                 return cxgb_rdma_ctl(adapter, req, data);