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>

2 files changed, 8 insertions, 0 deletions

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);