fm10k: add statistics for actual DWORD count of mbmem mailbox

A previous bug was uncovered by addition of a debug stat to indicate the
actual number of DWORDS we pulled from the mbmem. It turned out this was
not the same as the tx_dwords counter. While the previous bug fix should
have corrected this in all cases, add some debug stats that count the
number of DWORDs pushed or pulled from the mbmem. A future debugger may
take advantage of this statistic for debugging purposes. Since we're
modifying fm10k_mbx.h, update the copyright year as well.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
index 2ce0eba..7c01561 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
@@ -114,9 +114,11 @@ static const struct fm10k_stats fm10k_gstrings_mbx_stats[] = {
        FM10K_MBX_STAT("mbx_tx_oversized", tx_dropped),
        FM10K_MBX_STAT("mbx_tx_messages", tx_messages),
        FM10K_MBX_STAT("mbx_tx_dwords", tx_dwords),
+       FM10K_MBX_STAT("mbx_tx_mbmem_pulled", tx_mbmem_pulled),
        FM10K_MBX_STAT("mbx_rx_messages", rx_messages),
        FM10K_MBX_STAT("mbx_rx_dwords", rx_dwords),
        FM10K_MBX_STAT("mbx_rx_parse_err", rx_parse_err),
+       FM10K_MBX_STAT("mbx_rx_mbmem_pushed", rx_mbmem_pushed),
 };
 
 #define FM10K_GLOBAL_STATS_LEN ARRAY_SIZE(fm10k_gstrings_global_stats)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c
index af09a1b..2bce474 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.c
@@ -375,6 +375,8 @@ static void fm10k_mbx_write_copy(struct fm10k_hw *hw,
                        if (!tail)
                                tail++;
 
+                       mbx->tx_mbmem_pulled++;
+
                        /* write message to hardware FIFO */
                        fm10k_write_reg(hw, mbmem + tail++, *(head++));
                } while (--len && --end);
@@ -459,6 +461,8 @@ static void fm10k_mbx_read_copy(struct fm10k_hw *hw,
                        if (!head)
                                head++;
 
+                       mbx->rx_mbmem_pushed++;
+
                        /* read message from hardware FIFO */
                        *(tail++) = fm10k_read_reg(hw, mbmem + head++);
                } while (--len && --end);

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h
index 0419a7f..c4f18a8 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_mbx.h
@@ -1,5 +1,5 @@
 /* Intel Ethernet Switch Host Interface Driver
- * Copyright(c) 2013 - 2014 Intel Corporation.
+ * Copyright(c) 2013 - 2015 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -291,8 +291,10 @@ struct fm10k_mbx_info {
        u64 tx_dropped;
        u64 tx_messages;
        u64 tx_dwords;
+       u64 tx_mbmem_pulled;
        u64 rx_messages;
        u64 rx_dwords;
+       u64 rx_mbmem_pushed;
        u64 rx_parse_err;
 
        /* Buffer to store messages */