qla2xxx: Export DIF stats via debugfs

Signed-off-by: Anil Gurumurthy <anil.gurumurthy@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/scsi/qla2xxx/qla_def.h

@@ -3108,6 +3108,16 @@ struct qla_chip_state_84xx {
 	uint32_t gold_fw_version;
 };
 
+struct qla_dif_statistics {
+	uint64_t dif_input_bytes;
+	uint64_t dif_output_bytes;
+	uint64_t dif_input_requests;
+	uint64_t dif_output_requests;
+	uint32_t dif_guard_err;
+	uint32_t dif_ref_tag_err;
+	uint32_t dif_app_tag_err;
+};
+
 struct qla_statistics {
 	uint32_t total_isp_aborts;
 	uint64_t input_bytes;
@@ -3120,6 +3130,8 @@ struct qla_statistics {
 	uint32_t stat_max_pend_cmds;
 	uint32_t stat_max_qfull_cmds_alloc;
 	uint32_t stat_max_qfull_cmds_dropped;
+
+	struct qla_dif_statistics qla_dif_stats;
 };
 
 struct bidi_statistics {

drivers/scsi/qla2xxx/qla_dfs.c

@@ -114,6 +114,21 @@ qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 	seq_printf(s, "num Q full sent = %lld\n",
 		vha->tgt_counters.num_q_full_sent);
 
+	/* DIF stats */
+	seq_printf(s, "DIF Inp Bytes = %lld\n",
+		vha->qla_stats.qla_dif_stats.dif_input_bytes);
+	seq_printf(s, "DIF Outp Bytes = %lld\n",
+		vha->qla_stats.qla_dif_stats.dif_output_bytes);
+	seq_printf(s, "DIF Inp Req = %lld\n",
+		vha->qla_stats.qla_dif_stats.dif_input_requests);
+	seq_printf(s, "DIF Outp Req = %lld\n",
+		vha->qla_stats.qla_dif_stats.dif_output_requests);
+	seq_printf(s, "DIF Guard err = %d\n",
+		vha->qla_stats.qla_dif_stats.dif_guard_err);
+	seq_printf(s, "DIF Ref tag err = %d\n",
+		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);
 	return 0;
 }