amd-xgbe: Read and save the port property registers during probe

Read and save the port property registers once during the device probe
and then use the saved values as they are needed.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 62 insertions, 47 deletions

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
index 7b63521a5f4d..7b86240ecd5f 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
@@ -335,12 +335,29 @@ static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	pdata->awcr = XGBE_DMA_PCI_AWCR;
 	pdata->awarcr = XGBE_DMA_PCI_AWARCR;
 
+	/* Read the port property registers */
+	pdata->pp0 = XP_IOREAD(pdata, XP_PROP_0);
+	pdata->pp1 = XP_IOREAD(pdata, XP_PROP_1);
+	pdata->pp2 = XP_IOREAD(pdata, XP_PROP_2);
+	pdata->pp3 = XP_IOREAD(pdata, XP_PROP_3);
+	pdata->pp4 = XP_IOREAD(pdata, XP_PROP_4);
+	if (netif_msg_probe(pdata)) {
+		dev_dbg(dev, "port property 0 = %#010x\n", pdata->pp0);
+		dev_dbg(dev, "port property 1 = %#010x\n", pdata->pp1);
+		dev_dbg(dev, "port property 2 = %#010x\n", pdata->pp2);
+		dev_dbg(dev, "port property 3 = %#010x\n", pdata->pp3);
+		dev_dbg(dev, "port property 4 = %#010x\n", pdata->pp4);
+	}
+
 	/* Set the maximum channels and queues */
-	reg = XP_IOREAD(pdata, XP_PROP_1);
-	pdata->tx_max_channel_count = XP_GET_BITS(reg, XP_PROP_1, MAX_TX_DMA);
-	pdata->rx_max_channel_count = XP_GET_BITS(reg, XP_PROP_1, MAX_RX_DMA);
-	pdata->tx_max_q_count = XP_GET_BITS(reg, XP_PROP_1, MAX_TX_QUEUES);
-	pdata->rx_max_q_count = XP_GET_BITS(reg, XP_PROP_1, MAX_RX_QUEUES);
+	pdata->tx_max_channel_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
+						  MAX_TX_DMA);
+	pdata->rx_max_channel_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
+						  MAX_RX_DMA);
+	pdata->tx_max_q_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
+					    MAX_TX_QUEUES);
+	pdata->rx_max_q_count = XP_GET_BITS(pdata->pp1, XP_PROP_1,
+					    MAX_RX_QUEUES);
 	if (netif_msg_probe(pdata)) {
 		dev_dbg(dev, "max tx/rx channel count = %u/%u\n",
 			pdata->tx_max_channel_count,
@@ -353,12 +370,13 @@ static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	xgbe_set_counts(pdata);
 
 	/* Set the maximum fifo amounts */
-	reg = XP_IOREAD(pdata, XP_PROP_2);
-	pdata->tx_max_fifo_size = XP_GET_BITS(reg, XP_PROP_2, TX_FIFO_SIZE);
+	pdata->tx_max_fifo_size = XP_GET_BITS(pdata->pp2, XP_PROP_2,
+					      TX_FIFO_SIZE);
 	pdata->tx_max_fifo_size *= 16384;
 	pdata->tx_max_fifo_size = min(pdata->tx_max_fifo_size,
 				      pdata->vdata->tx_max_fifo_size);
-	pdata->rx_max_fifo_size = XP_GET_BITS(reg, XP_PROP_2, RX_FIFO_SIZE);
+	pdata->rx_max_fifo_size = XP_GET_BITS(pdata->pp2, XP_PROP_2,
+					      RX_FIFO_SIZE);
 	pdata->rx_max_fifo_size *= 16384;
 	pdata->rx_max_fifo_size = min(pdata->rx_max_fifo_size,
 				      pdata->vdata->rx_max_fifo_size);
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
index aac884314000..123ceb0540d7 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
@@ -2421,22 +2421,21 @@ static int xgbe_phy_link_status(struct xgbe_prv_data *pdata, int *an_restart)
 static void xgbe_phy_sfp_gpio_setup(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_phy_data *phy_data = pdata->phy_data;
-	unsigned int reg;
-
-	reg = XP_IOREAD(pdata, XP_PROP_3);
 
 	phy_data->sfp_gpio_address = XGBE_GPIO_ADDRESS_PCA9555 +
-				     XP_GET_BITS(reg, XP_PROP_3, GPIO_ADDR);
+				     XP_GET_BITS(pdata->pp3, XP_PROP_3,
+						 GPIO_ADDR);
 
-	phy_data->sfp_gpio_mask = XP_GET_BITS(reg, XP_PROP_3, GPIO_MASK);
+	phy_data->sfp_gpio_mask = XP_GET_BITS(pdata->pp3, XP_PROP_3,
+					      GPIO_MASK);
 
-	phy_data->sfp_gpio_rx_los = XP_GET_BITS(reg, XP_PROP_3,
+	phy_data->sfp_gpio_rx_los = XP_GET_BITS(pdata->pp3, XP_PROP_3,
 						GPIO_RX_LOS);
-	phy_data->sfp_gpio_tx_fault = XP_GET_BITS(reg, XP_PROP_3,
+	phy_data->sfp_gpio_tx_fault = XP_GET_BITS(pdata->pp3, XP_PROP_3,
 						  GPIO_TX_FAULT);
-	phy_data->sfp_gpio_mod_absent = XP_GET_BITS(reg, XP_PROP_3,
+	phy_data->sfp_gpio_mod_absent = XP_GET_BITS(pdata->pp3, XP_PROP_3,
 						    GPIO_MOD_ABS);
-	phy_data->sfp_gpio_rate_select = XP_GET_BITS(reg, XP_PROP_3,
+	phy_data->sfp_gpio_rate_select = XP_GET_BITS(pdata->pp3, XP_PROP_3,
 						     GPIO_RATE_SELECT);
 
 	if (netif_msg_probe(pdata)) {
@@ -2458,18 +2457,17 @@ static void xgbe_phy_sfp_gpio_setup(struct xgbe_prv_data *pdata)
 static void xgbe_phy_sfp_comm_setup(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_phy_data *phy_data = pdata->phy_data;
-	unsigned int reg, mux_addr_hi, mux_addr_lo;
+	unsigned int mux_addr_hi, mux_addr_lo;
 
-	reg = XP_IOREAD(pdata, XP_PROP_4);
-
-	mux_addr_hi = XP_GET_BITS(reg, XP_PROP_4, MUX_ADDR_HI);
-	mux_addr_lo = XP_GET_BITS(reg, XP_PROP_4, MUX_ADDR_LO);
+	mux_addr_hi = XP_GET_BITS(pdata->pp4, XP_PROP_4, MUX_ADDR_HI);
+	mux_addr_lo = XP_GET_BITS(pdata->pp4, XP_PROP_4, MUX_ADDR_LO);
 	if (mux_addr_lo == XGBE_SFP_DIRECT)
 		return;
 
 	phy_data->sfp_comm = XGBE_SFP_COMM_PCA9545;
 	phy_data->sfp_mux_address = (mux_addr_hi << 2) + mux_addr_lo;
-	phy_data->sfp_mux_channel = XP_GET_BITS(reg, XP_PROP_4, MUX_CHAN);
+	phy_data->sfp_mux_channel = XP_GET_BITS(pdata->pp4, XP_PROP_4,
+						MUX_CHAN);
 
 	if (netif_msg_probe(pdata)) {
 		dev_dbg(pdata->dev, "SFP: mux_address=%#x\n",
@@ -2592,13 +2590,11 @@ static bool xgbe_phy_redrv_error(struct xgbe_phy_data *phy_data)
 static int xgbe_phy_mdio_reset_setup(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_phy_data *phy_data = pdata->phy_data;
-	unsigned int reg;
 
 	if (phy_data->conn_type != XGBE_CONN_TYPE_MDIO)
 		return 0;
 
-	reg = XP_IOREAD(pdata, XP_PROP_3);
-	phy_data->mdio_reset = XP_GET_BITS(reg, XP_PROP_3, MDIO_RESET);
+	phy_data->mdio_reset = XP_GET_BITS(pdata->pp3, XP_PROP_3, MDIO_RESET);
 	switch (phy_data->mdio_reset) {
 	case XGBE_MDIO_RESET_NONE:
 	case XGBE_MDIO_RESET_I2C_GPIO:
@@ -2612,12 +2608,12 @@ static int xgbe_phy_mdio_reset_setup(struct xgbe_prv_data *pdata)
 
 	if (phy_data->mdio_reset == XGBE_MDIO_RESET_I2C_GPIO) {
 		phy_data->mdio_reset_addr = XGBE_GPIO_ADDRESS_PCA9555 +
-					    XP_GET_BITS(reg, XP_PROP_3,
+					    XP_GET_BITS(pdata->pp3, XP_PROP_3,
 							MDIO_RESET_I2C_ADDR);
-		phy_data->mdio_reset_gpio = XP_GET_BITS(reg, XP_PROP_3,
+		phy_data->mdio_reset_gpio = XP_GET_BITS(pdata->pp3, XP_PROP_3,
 							MDIO_RESET_I2C_GPIO);
 	} else if (phy_data->mdio_reset == XGBE_MDIO_RESET_INT_GPIO) {
-		phy_data->mdio_reset_gpio = XP_GET_BITS(reg, XP_PROP_3,
+		phy_data->mdio_reset_gpio = XP_GET_BITS(pdata->pp3, XP_PROP_3,
 							MDIO_RESET_INT_GPIO);
 	}
 
@@ -2707,12 +2703,9 @@ static bool xgbe_phy_conn_type_mismatch(struct xgbe_prv_data *pdata)
 
 static bool xgbe_phy_port_enabled(struct xgbe_prv_data *pdata)
 {
-	unsigned int reg;
-
-	reg = XP_IOREAD(pdata, XP_PROP_0);
-	if (!XP_GET_BITS(reg, XP_PROP_0, PORT_SPEEDS))
+	if (!XP_GET_BITS(pdata->pp0, XP_PROP_0, PORT_SPEEDS))
 		return false;
-	if (!XP_GET_BITS(reg, XP_PROP_0, CONN_TYPE))
+	if (!XP_GET_BITS(pdata->pp0, XP_PROP_0, CONN_TYPE))
 		return false;
 
 	return true;
@@ -2921,7 +2914,6 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 	struct ethtool_link_ksettings *lks = &pdata->phy.lks;
 	struct xgbe_phy_data *phy_data;
 	struct mii_bus *mii;
-	unsigned int reg;
 	int ret;
 
 	/* Check if enabled */
@@ -2940,12 +2932,11 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 		return -ENOMEM;
 	pdata->phy_data = phy_data;
 
-	reg = XP_IOREAD(pdata, XP_PROP_0);
-	phy_data->port_mode = XP_GET_BITS(reg, XP_PROP_0, PORT_MODE);
-	phy_data->port_id = XP_GET_BITS(reg, XP_PROP_0, PORT_ID);
-	phy_data->port_speeds = XP_GET_BITS(reg, XP_PROP_0, PORT_SPEEDS);
-	phy_data->conn_type = XP_GET_BITS(reg, XP_PROP_0, CONN_TYPE);
-	phy_data->mdio_addr = XP_GET_BITS(reg, XP_PROP_0, MDIO_ADDR);
+	phy_data->port_mode = XP_GET_BITS(pdata->pp0, XP_PROP_0, PORT_MODE);
+	phy_data->port_id = XP_GET_BITS(pdata->pp0, XP_PROP_0, PORT_ID);
+	phy_data->port_speeds = XP_GET_BITS(pdata->pp0, XP_PROP_0, PORT_SPEEDS);
+	phy_data->conn_type = XP_GET_BITS(pdata->pp0, XP_PROP_0, CONN_TYPE);
+	phy_data->mdio_addr = XP_GET_BITS(pdata->pp0, XP_PROP_0, MDIO_ADDR);
 	if (netif_msg_probe(pdata)) {
 		dev_dbg(pdata->dev, "port mode=%u\n", phy_data->port_mode);
 		dev_dbg(pdata->dev, "port id=%u\n", phy_data->port_id);
@@ -2954,12 +2945,11 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 		dev_dbg(pdata->dev, "mdio addr=%u\n", phy_data->mdio_addr);
 	}
 
-	reg = XP_IOREAD(pdata, XP_PROP_4);
-	phy_data->redrv = XP_GET_BITS(reg, XP_PROP_4, REDRV_PRESENT);
-	phy_data->redrv_if = XP_GET_BITS(reg, XP_PROP_4, REDRV_IF);
-	phy_data->redrv_addr = XP_GET_BITS(reg, XP_PROP_4, REDRV_ADDR);
-	phy_data->redrv_lane = XP_GET_BITS(reg, XP_PROP_4, REDRV_LANE);
-	phy_data->redrv_model = XP_GET_BITS(reg, XP_PROP_4, REDRV_MODEL);
+	phy_data->redrv = XP_GET_BITS(pdata->pp4, XP_PROP_4, REDRV_PRESENT);
+	phy_data->redrv_if = XP_GET_BITS(pdata->pp4, XP_PROP_4, REDRV_IF);
+	phy_data->redrv_addr = XP_GET_BITS(pdata->pp4, XP_PROP_4, REDRV_ADDR);
+	phy_data->redrv_lane = XP_GET_BITS(pdata->pp4, XP_PROP_4, REDRV_LANE);
+	phy_data->redrv_model = XP_GET_BITS(pdata->pp4, XP_PROP_4, REDRV_MODEL);
 	if (phy_data->redrv && netif_msg_probe(pdata)) {
 		dev_dbg(pdata->dev, "redrv present\n");
 		dev_dbg(pdata->dev, "redrv i/f=%u\n", phy_data->redrv_if);
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index 95d4b56448c6..54e43ad32d26 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -1027,6 +1027,13 @@ struct xgbe_prv_data {
 	void __iomem *xprop_regs;	/* XGBE property registers */
 	void __iomem *xi2c_regs;	/* XGBE I2C CSRs */
 
+	/* Port property registers */
+	unsigned int pp0;
+	unsigned int pp1;
+	unsigned int pp2;
+	unsigned int pp3;
+	unsigned int pp4;
+
 	/* Overall device lock */
 	spinlock_t lock;