scsi: qla2xxx: Add error counters to debugfs node

Display error counters via debugfs node.

Link: https://lore.kernel.org/r/20210111093134.1206-3-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c
index d5ebcf7d70ff09a1536ff961b6d1e70424b441f7..ccce0eab844edc0a4266ecf2dfc970fa06686b21 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_dfs.c
+++ b/drivers/scsi/qla2xxx/qla_dfs.c
@@ -286,6 +286,10 @@ qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
                core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
                num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
        u16 i;
+       fc_port_t *fcport = NULL;
+
+       if (qla2x00_chip_is_down(vha))
+               return 0;
 
        qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
        core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
@@ -349,6 +353,30 @@ qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
                vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
        seq_printf(s, "DIF App tag err = %d\n",
                vha->qla_stats.qla_dif_stats.dif_app_tag_err);
+
+       seq_puts(s, "\n");
+       seq_puts(s, "Initiator Error Counters\n");
+       seq_printf(s, "HW Error Count =         %14lld\n",
+                  vha->hw_err_cnt);
+       seq_printf(s, "Link Down Count =        %14lld\n",
+                  vha->short_link_down_cnt);
+       seq_printf(s, "Interface Err Count =    %14lld\n",
+                  vha->interface_err_cnt);
+       seq_printf(s, "Cmd Timeout Count =      %14lld\n",
+                  vha->cmd_timeout_cnt);
+       seq_printf(s, "Reset Count =            %14lld\n",
+                  vha->reset_cmd_err_cnt);
+       seq_puts(s, "\n");
+
+       list_for_each_entry(fcport, &vha->vp_fcports, list) {
+               if (!fcport || !fcport->rport)
+                       continue;
+
+               seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
+                          fcport->rport->number, fcport->tgt_short_link_down_cnt);
+       }
+       seq_puts(s, "\n");
+
        return 0;
 }