Merge branch 'pci/controller/xilinx'

- Fix off-by-one error in INTx IRQ handler that caused INTx interrupts to
  be lost or delivered as the wrong interrupt (Sean Anderson)

- Rate-limit misc interrupt messages (Sean Anderson)

- Turn off the clock on probe failure and device removal (Sean Anderson)

- Add DT binding and driver support for enabling/disabling PHYs (Sean
  Anderson)

- Add PCIe phy bindings for the ZCU102 (Sean Anderson)

- Add support for Xilinx QDMA Soft IP PCIe Root Port Bridge to DT binding
  and xilinx-dma-pl driver (Thippeswamy Havalige)

* pci/controller/xilinx:
  PCI: xilinx-xdma: Add Xilinx QDMA Root Port driver
  dt-bindings: PCI: xilinx-xdma: Add schemas for Xilinx QDMA PCIe Root Port Bridge
  arm64: zynqmp: Add PCIe phys property for ZCU102
  PCI: xilinx-nwl: Add PHY support
  dt-bindings: pci: xilinx-nwl: Add phys property
  PCI: xilinx-nwl: Clean up clock on probe failure/removal
  PCI: xilinx-nwl: Rate-limit misc interrupt messages
  PCI: xilinx-nwl: Fix register misspelling
  PCI: xilinx-nwl: Fix off-by-one in INTx IRQ handler

1 files changed, 116 insertions, 23 deletions

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index d5615cf8563f..a8ae14474dd0 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -19,6 +19,7 @@
 #include <linux/of_platform.h>
 #include <linux/pci.h>
 #include <linux/pci-ecam.h>
+#include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/irqchip/chained_irq.h>
 
@@ -80,8 +81,8 @@
 #define MSGF_MISC_SR_NON_FATAL_DEV	BIT(22)
 #define MSGF_MISC_SR_FATAL_DEV		BIT(23)
 #define MSGF_MISC_SR_LINK_DOWN		BIT(24)
-#define MSGF_MSIC_SR_LINK_AUTO_BWIDTH	BIT(25)
-#define MSGF_MSIC_SR_LINK_BWIDTH	BIT(26)
+#define MSGF_MISC_SR_LINK_AUTO_BWIDTH	BIT(25)
+#define MSGF_MISC_SR_LINK_BWIDTH	BIT(26)
 
 #define MSGF_MISC_SR_MASKALL		(MSGF_MISC_SR_RXMSG_AVAIL | \
 					MSGF_MISC_SR_RXMSG_OVER | \
@@ -96,8 +97,8 @@
 					MSGF_MISC_SR_NON_FATAL_DEV | \
 					MSGF_MISC_SR_FATAL_DEV | \
 					MSGF_MISC_SR_LINK_DOWN | \
-					MSGF_MSIC_SR_LINK_AUTO_BWIDTH | \
-					MSGF_MSIC_SR_LINK_BWIDTH)
+					MSGF_MISC_SR_LINK_AUTO_BWIDTH | \
+					MSGF_MISC_SR_LINK_BWIDTH)
 
 /* Legacy interrupt status mask bits */
 #define MSGF_LEG_SR_INTA		BIT(0)
@@ -157,6 +158,7 @@ struct nwl_pcie {
 	void __iomem *breg_base;
 	void __iomem *pcireg_base;
 	void __iomem *ecam_base;
+	struct phy *phy[4];
 	phys_addr_t phys_breg_base;	/* Physical Bridge Register Base */
 	phys_addr_t phys_pcie_reg_base;	/* Physical PCIe Controller Base */
 	phys_addr_t phys_ecam_base;	/* Physical Configuration Base */
@@ -267,42 +269,42 @@ static irqreturn_t nwl_pcie_misc_handler(int irq, void *data)
 		return IRQ_NONE;
 
 	if (misc_stat & MSGF_MISC_SR_RXMSG_OVER)
-		dev_err(dev, "Received Message FIFO Overflow\n");
+		dev_err_ratelimited(dev, "Received Message FIFO Overflow\n");
 
 	if (misc_stat & MSGF_MISC_SR_SLAVE_ERR)
-		dev_err(dev, "Slave error\n");
+		dev_err_ratelimited(dev, "Slave error\n");
 
 	if (misc_stat & MSGF_MISC_SR_MASTER_ERR)
-		dev_err(dev, "Master error\n");
+		dev_err_ratelimited(dev, "Master error\n");
 
 	if (misc_stat & MSGF_MISC_SR_I_ADDR_ERR)
-		dev_err(dev, "In Misc Ingress address translation error\n");
+		dev_err_ratelimited(dev, "In Misc Ingress address translation error\n");
 
 	if (misc_stat & MSGF_MISC_SR_E_ADDR_ERR)
-		dev_err(dev, "In Misc Egress address translation error\n");
+		dev_err_ratelimited(dev, "In Misc Egress address translation error\n");
 
 	if (misc_stat & MSGF_MISC_SR_FATAL_AER)
-		dev_err(dev, "Fatal Error in AER Capability\n");
+		dev_err_ratelimited(dev, "Fatal Error in AER Capability\n");
 
 	if (misc_stat & MSGF_MISC_SR_NON_FATAL_AER)
-		dev_err(dev, "Non-Fatal Error in AER Capability\n");
+		dev_err_ratelimited(dev, "Non-Fatal Error in AER Capability\n");
 
 	if (misc_stat & MSGF_MISC_SR_CORR_AER)
-		dev_err(dev, "Correctable Error in AER Capability\n");
+		dev_err_ratelimited(dev, "Correctable Error in AER Capability\n");
 
 	if (misc_stat & MSGF_MISC_SR_UR_DETECT)
-		dev_err(dev, "Unsupported request Detected\n");
+		dev_err_ratelimited(dev, "Unsupported request Detected\n");
 
 	if (misc_stat & MSGF_MISC_SR_NON_FATAL_DEV)
-		dev_err(dev, "Non-Fatal Error Detected\n");
+		dev_err_ratelimited(dev, "Non-Fatal Error Detected\n");
 
 	if (misc_stat & MSGF_MISC_SR_FATAL_DEV)
-		dev_err(dev, "Fatal Error Detected\n");
+		dev_err_ratelimited(dev, "Fatal Error Detected\n");
 
-	if (misc_stat & MSGF_MSIC_SR_LINK_AUTO_BWIDTH)
+	if (misc_stat & MSGF_MISC_SR_LINK_AUTO_BWIDTH)
 		dev_info(dev, "Link Autonomous Bandwidth Management Status bit set\n");
 
-	if (misc_stat & MSGF_MSIC_SR_LINK_BWIDTH)
+	if (misc_stat & MSGF_MISC_SR_LINK_BWIDTH)
 		dev_info(dev, "Link Bandwidth Management Status bit set\n");
 
 	/* Clear misc interrupt status */
@@ -371,7 +373,7 @@ static void nwl_mask_intx_irq(struct irq_data *data)
 	u32 mask;
 	u32 val;
 
-	mask = 1 << (data->hwirq - 1);
+	mask = 1 << data->hwirq;
 	raw_spin_lock_irqsave(&pcie->leg_mask_lock, flags);
 	val = nwl_bridge_readl(pcie, MSGF_LEG_MASK);
 	nwl_bridge_writel(pcie, (val & (~mask)), MSGF_LEG_MASK);
@@ -385,7 +387,7 @@ static void nwl_unmask_intx_irq(struct irq_data *data)
 	u32 mask;
 	u32 val;
 
-	mask = 1 << (data->hwirq - 1);
+	mask = 1 << data->hwirq;
 	raw_spin_lock_irqsave(&pcie->leg_mask_lock, flags);
 	val = nwl_bridge_readl(pcie, MSGF_LEG_MASK);
 	nwl_bridge_writel(pcie, (val | mask), MSGF_LEG_MASK);
@@ -514,6 +516,60 @@ static int nwl_pcie_init_msi_irq_domain(struct nwl_pcie *pcie)
 	return 0;
 }
 
+static void nwl_pcie_phy_power_off(struct nwl_pcie *pcie, int i)
+{
+	int err = phy_power_off(pcie->phy[i]);
+
+	if (err)
+		dev_err(pcie->dev, "could not power off phy %d (err=%d)\n", i,
+			err);
+}
+
+static void nwl_pcie_phy_exit(struct nwl_pcie *pcie, int i)
+{
+	int err = phy_exit(pcie->phy[i]);
+
+	if (err)
+		dev_err(pcie->dev, "could not exit phy %d (err=%d)\n", i, err);
+}
+
+static int nwl_pcie_phy_enable(struct nwl_pcie *pcie)
+{
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(pcie->phy); i++) {
+		ret = phy_init(pcie->phy[i]);
+		if (ret)
+			goto err;
+
+		ret = phy_power_on(pcie->phy[i]);
+		if (ret) {
+			nwl_pcie_phy_exit(pcie, i);
+			goto err;
+		}
+	}
+
+	return 0;
+
+err:
+	while (i--) {
+		nwl_pcie_phy_power_off(pcie, i);
+		nwl_pcie_phy_exit(pcie, i);
+	}
+
+	return ret;
+}
+
+static void nwl_pcie_phy_disable(struct nwl_pcie *pcie)
+{
+	int i;
+
+	for (i = ARRAY_SIZE(pcie->phy); i--;) {
+		nwl_pcie_phy_power_off(pcie, i);
+		nwl_pcie_phy_exit(pcie, i);
+	}
+}
+
 static int nwl_pcie_init_irq_domain(struct nwl_pcie *pcie)
 {
 	struct device *dev = pcie->dev;
@@ -725,6 +781,7 @@ static int nwl_pcie_parse_dt(struct nwl_pcie *pcie,
 {
 	struct device *dev = pcie->dev;
 	struct resource *res;
+	int i;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "breg");
 	pcie->breg_base = devm_ioremap_resource(dev, res);
@@ -752,6 +809,18 @@ static int nwl_pcie_parse_dt(struct nwl_pcie *pcie,
 	irq_set_chained_handler_and_data(pcie->irq_intx,
 					 nwl_pcie_leg_handler, pcie);
 
+
+	for (i = 0; i < ARRAY_SIZE(pcie->phy); i++) {
+		pcie->phy[i] = devm_of_phy_get_by_index(dev, dev->of_node, i);
+		if (PTR_ERR(pcie->phy[i]) == -ENODEV) {
+			pcie->phy[i] = NULL;
+			break;
+		}
+
+		if (IS_ERR(pcie->phy[i]))
+			return PTR_ERR(pcie->phy[i]);
+	}
+
 	return 0;
 }
 
@@ -772,6 +841,7 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	pcie = pci_host_bridge_priv(bridge);
+	platform_set_drvdata(pdev, pcie);
 
 	pcie->dev = dev;
 
@@ -791,16 +861,22 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	err = nwl_pcie_phy_enable(pcie);
+	if (err) {
+		dev_err(dev, "could not enable PHYs\n");
+		goto err_clk;
+	}
+
 	err = nwl_pcie_bridge_init(pcie);
 	if (err) {
 		dev_err(dev, "HW Initialization failed\n");
-		return err;
+		goto err_phy;
 	}
 
 	err = nwl_pcie_init_irq_domain(pcie);
 	if (err) {
 		dev_err(dev, "Failed creating IRQ Domain\n");
-		return err;
+		goto err_phy;
 	}
 
 	bridge->sysdata = pcie;
@@ -810,11 +886,27 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 		err = nwl_pcie_enable_msi(pcie);
 		if (err < 0) {
 			dev_err(dev, "failed to enable MSI support: %d\n", err);
-			return err;
+			goto err_phy;
 		}
 	}
 
-	return pci_host_probe(bridge);
+	err = pci_host_probe(bridge);
+	if (!err)
+		return 0;
+
+err_phy:
+	nwl_pcie_phy_disable(pcie);
+err_clk:
+	clk_disable_unprepare(pcie->clk);
+	return err;
+}
+
+static void nwl_pcie_remove(struct platform_device *pdev)
+{
+	struct nwl_pcie *pcie = platform_get_drvdata(pdev);
+
+	nwl_pcie_phy_disable(pcie);
+	clk_disable_unprepare(pcie->clk);
 }
 
 static struct platform_driver nwl_pcie_driver = {
@@ -824,5 +916,6 @@ static struct platform_driver nwl_pcie_driver = {
 		.of_match_table = nwl_pcie_of_match,
 	},
 	.probe = nwl_pcie_probe,
+	.remove_new = nwl_pcie_remove,
 };
 builtin_platform_driver(nwl_pcie_driver);