net: dsa: sja1105: stop reporting the queue levels in ethtool port counters

The queue levels are not counters, but instead they represent the
occupancy of the MAC TX queues. Having these in ethtool port counters is
not helpful, so remove them.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/sja1105/sja1105.h

@@ -65,7 +65,6 @@ struct sja1105_regs {
 	u64 mac_hl1[SJA1105_NUM_PORTS];
 	u64 mac_hl2[SJA1105_NUM_PORTS];
 	u64 ether_stats[SJA1105_NUM_PORTS];
-	u64 qlevel[SJA1105_NUM_PORTS];
 };
 
 struct sja1105_info {

drivers/net/dsa/sja1105/sja1105_ethtool.c

@@ -6,7 +6,6 @@
 #define SJA1105_SIZE_MAC_AREA		(0x02 * 4)
 #define SJA1105_SIZE_HL1_AREA		(0x10 * 4)
 #define SJA1105_SIZE_HL2_AREA		(0x4 * 4)
-#define SJA1105_SIZE_QLEVEL_AREA	(0x8 * 4) /* 0x4 to 0xB */
 #define SJA1105_SIZE_ETHER_AREA		(0x17 * 4)
 
 struct sja1105_port_status_mac {
@@ -60,8 +59,6 @@ struct sja1105_port_status_hl2 {
 	u64 n_part_drop;
 	u64 n_egr_disabled;
 	u64 n_not_reach;
-	u64 qlevel_hwm[8]; /* Only for P/Q/R/S */
-	u64 qlevel[8];     /* Only for P/Q/R/S */
 };
 
 struct sja1105_port_status_ether {
@@ -172,20 +169,6 @@ sja1105_port_status_hl2_unpack(void *buf,
 	sja1105_unpack(p + 0x0, &status->n_not_reach,    31,  0, 4);
 }
 
-static void
-sja1105pqrs_port_status_qlevel_unpack(void *buf,
-				      struct sja1105_port_status_hl2 *status)
-{
-	/* Make pointer arithmetic work on 4 bytes */
-	u32 *p = buf;
-	int i;
-
-	for (i = 0; i < 8; i++) {
-		sja1105_unpack(p + i, &status->qlevel_hwm[i], 24, 16, 4);
-		sja1105_unpack(p + i, &status->qlevel[i],      8,  0, 4);
-	}
-}
-
 static void
 sja1105pqrs_port_status_ether_unpack(void *buf,
 				     struct sja1105_port_status_ether *status)
@@ -280,7 +263,7 @@ static int sja1105_port_status_get_hl2(struct sja1105_private *priv,
 				       int port)
 {
 	const struct sja1105_regs *regs = priv->info->regs;
-	u8 packed_buf[SJA1105_SIZE_QLEVEL_AREA] = {0};
+	u8 packed_buf[SJA1105_SIZE_HL2_AREA] = {0};
 	int rc;
 
 	rc = sja1105_xfer_buf(priv, SPI_READ, regs->mac_hl2[port], packed_buf,
@@ -290,18 +273,6 @@ static int sja1105_port_status_get_hl2(struct sja1105_private *priv,
 
 	sja1105_port_status_hl2_unpack(packed_buf, status);
 
-	/* Code below is strictly P/Q/R/S specific. */
-	if (priv->info->device_id == SJA1105E_DEVICE_ID ||
-	    priv->info->device_id == SJA1105T_DEVICE_ID)
-		return 0;
-
-	rc = sja1105_xfer_buf(priv, SPI_READ, regs->qlevel[port], packed_buf,
-			      SJA1105_SIZE_QLEVEL_AREA);
-	if (rc < 0)
-		return rc;
-
-	sja1105pqrs_port_status_qlevel_unpack(packed_buf, status);
-
 	return 0;
 }
 
@@ -375,23 +346,6 @@ static char sja1105_port_stats[][ETH_GSTRING_LEN] = {
 };
 
 static char sja1105pqrs_extra_port_stats[][ETH_GSTRING_LEN] = {
-	/* Queue Levels */
-	"qlevel_hwm_0",
-	"qlevel_hwm_1",
-	"qlevel_hwm_2",
-	"qlevel_hwm_3",
-	"qlevel_hwm_4",
-	"qlevel_hwm_5",
-	"qlevel_hwm_6",
-	"qlevel_hwm_7",
-	"qlevel_0",
-	"qlevel_1",
-	"qlevel_2",
-	"qlevel_3",
-	"qlevel_4",
-	"qlevel_5",
-	"qlevel_6",
-	"qlevel_7",
 	/* Ether Stats */
 	"n_drops_nolearn",
 	"n_drops_noroute",
@@ -422,7 +376,7 @@ void sja1105_get_ethtool_stats(struct dsa_switch *ds, int port, u64 *data)
 {
 	struct sja1105_private *priv = ds->priv;
 	struct sja1105_port_status *status;
-	int rc, i, k = 0;
+	int rc, k = 0;
 
 	status = kzalloc(sizeof(*status), GFP_KERNEL);
 	if (!status)
@@ -482,10 +436,6 @@ void sja1105_get_ethtool_stats(struct dsa_switch *ds, int port, u64 *data)
 
 	memset(data + k, 0, ARRAY_SIZE(sja1105pqrs_extra_port_stats) *
 			sizeof(u64));
-	for (i = 0; i < 8; i++) {
-		data[k++] = status->hl2.qlevel_hwm[i];
-		data[k++] = status->hl2.qlevel[i];
-	}
 	data[k++] = status->ether.n_drops_nolearn;
 	data[k++] = status->ether.n_drops_noroute;
 	data[k++] = status->ether.n_drops_ill_dtag;

drivers/net/dsa/sja1105/sja1105_spi.c

@@ -464,7 +464,6 @@ static struct sja1105_regs sja1105pqrs_regs = {
 	.rgmii_tx_clk = {0x100016, 0x10001C, 0x100022, 0x100028, 0x10002E},
 	.rmii_ref_clk = {0x100015, 0x10001B, 0x100021, 0x100027, 0x10002D},
 	.rmii_ext_tx_clk = {0x100017, 0x10001D, 0x100023, 0x100029, 0x10002F},
-	.qlevel = {0x604, 0x614, 0x624, 0x634, 0x644},
 	.ptpegr_ts = {0xC0, 0xC4, 0xC8, 0xCC, 0xD0},
 	.ptpschtm = 0x13, /* Spans 0x13 to 0x14 */
 	.ptppinst = 0x15,