staging/rdma/hfi1: unknown frame messages are not errors

Change reported unknown frame messages into a counter.
These are informational, no errors.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rdma/hfi1/chip.c

@@ -1418,6 +1418,17 @@ static u64 access_sw_link_up_cnt(const struct cntr_entry *entry, void *context,
 	return read_write_sw(ppd->dd, &ppd->link_up, mode, data);
 }
 
+static u64 access_sw_unknown_frame_cnt(const struct cntr_entry *entry,
+				       void *context, int vl, int mode,
+				       u64 data)
+{
+	struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+	if (vl != CNTR_INVALID_VL)
+		return 0;
+	return read_write_sw(ppd->dd, &ppd->unknown_frame_count, mode, data);
+}
+
 static u64 access_sw_xmit_discards(const struct cntr_entry *entry,
 				    void *context, int vl, int mode, u64 data)
 {
@@ -4879,6 +4890,8 @@ static struct cntr_entry port_cntrs[PORT_CNTR_LAST] = {
 			access_sw_link_dn_cnt),
 [C_SW_LINK_UP] = CNTR_ELEM("SwLinkUp", 0, 0, CNTR_SYNTH | CNTR_32BIT,
 			access_sw_link_up_cnt),
+[C_SW_UNKNOWN_FRAME] = CNTR_ELEM("UnknownFrame", 0, 0, CNTR_NORMAL,
+				 access_sw_unknown_frame_cnt),
 [C_SW_XMIT_DSCD] = CNTR_ELEM("XmitDscd", 0, 0, CNTR_SYNTH | CNTR_32BIT,
 			access_sw_xmit_discards),
 [C_SW_XMIT_DSCD_VL] = CNTR_ELEM("XmitDscdVl", 0, 0,
@@ -7235,6 +7248,11 @@ static void handle_8051_interrupt(struct hfi1_devdata *dd, u32 unused, u64 reg)
 			}
 			err &= ~(u64)FAILED_LNI;
 		}
+		/* unknown frames can happen durning LNI, just count */
+		if (err & UNKNOWN_FRAME) {
+			ppd->unknown_frame_count++;
+			err &= ~(u64)UNKNOWN_FRAME;
+		}
 		if (err) {
 			/* report remaining errors, but do not do anything */
 			dd_dev_err(dd, "8051 info error: %s\n",

drivers/staging/rdma/hfi1/chip.h

@@ -1078,6 +1078,7 @@ enum {
 	C_RX_WORDS,
 	C_SW_LINK_DOWN,
 	C_SW_LINK_UP,
+	C_SW_UNKNOWN_FRAME,
 	C_SW_XMIT_DSCD,
 	C_SW_XMIT_DSCD_VL,
 	C_SW_XMIT_CSTR_ERR,

drivers/staging/rdma/hfi1/hfi.h

@@ -713,6 +713,8 @@ struct hfi1_pportdata {
 	u64 link_downed;
 	/* number of times link retrained successfully */
 	u64 link_up;
+	/* number of times a link unknown frame was reported */
+	u64 unknown_frame_count;
 	/* port_ltp_crc_mode is returned in 'portinfo' MADs */
 	u16 port_ltp_crc_mode;
 	/* port_crc_mode_enabled is the crc we support */