RDMA/cxgb4: Add debugfs RDMA memory stats

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
index 40c835309e49..2a87379f52a3 100644
--- a/drivers/infiniband/hw/cxgb4/mem.c
+++ b/drivers/infiniband/hw/cxgb4/mem.c
@@ -135,6 +135,11 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry,
                                              &rdev->resource.tpt_fifo_lock);
                 if (!stag_idx)
                         return -ENOMEM;
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.stag.cur += 32;
+                if (rdev->stats.stag.cur > rdev->stats.stag.max)
+                        rdev->stats.stag.max = rdev->stats.stag.cur;
+                mutex_unlock(&rdev->stats.lock);
                 *stag = (stag_idx << 8) | (atomic_inc_return(&key) & 0xff);
         }
         PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
@@ -165,9 +170,13 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry,
                                 (rdev->lldi.vr->stag.start >> 5),
                                 sizeof(tpt), &tpt);
 
-        if (reset_tpt_entry)
+        if (reset_tpt_entry) {
                 c4iw_put_resource(&rdev->resource.tpt_fifo, stag_idx,
                                   &rdev->resource.tpt_fifo_lock);
+                mutex_lock(&rdev->stats.lock);
+                rdev->stats.stag.cur -= 32;
+                mutex_unlock(&rdev->stats.lock);
+        }
         return err;
 }