[PATCH v4 0/7] PCI: xilinx-nwl: Add phy support

[PATCH v4 0/7] PCI: xilinx-nwl: Add phy support

[Sean Anderson]

Add phy subsystem support for the xilinx-nwl PCIe controller. This
series also includes several small fixes and improvements.

Changes in v4:
- Clarify dt-bindings commit subject/message
- Explain likely effects of the off-by-one error
- Trim down UBSAN backtrace
- Move if to after pci_host_probe
- Remove if in err_phy
- Fix error path in phy_enable skipping the first phy
- Disable phys in reverse order
- Use dev_err instead of WARN for errors

Changes in v3:
- Document phys property
- Expand off-by-one commit message

Changes in v2:
- Remove phy-names
- Add an example
- Get phys by index and not by name

Sean Anderson (7):
  dt-bindings: pci: xilinx-nwl: Add phys property
  PCI: xilinx-nwl: Fix off-by-one in IRQ handler
  PCI: xilinx-nwl: Fix register misspelling
  PCI: xilinx-nwl: Rate-limit misc interrupt messages
  PCI: xilinx-nwl: Clean up clock on probe failure/removal
  PCI: xilinx-nwl: Add phy support
  arm64: zynqmp: Add PCIe phys

 .../bindings/pci/xlnx,nwl-pcie.yaml           |   7 +
 .../boot/dts/xilinx/zynqmp-zcu102-revA.dts    |   1 +
 drivers/pci/controller/pcie-xilinx-nwl.c      | 139 +++++++++++++++---
 3 files changed, 124 insertions(+), 23 deletions(-)

-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 1/7] dt-bindings: pci: xilinx-nwl: Add phys property

[Sean Anderson]

Add phys properties so Linux can power-on/configure the GTR
transceivers (xlnx,zynqmp-psgtr-v1.1).

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---

Changes in v4:
- Clarify commit subject/message

Changes in v3:
- Document phys property

Changes in v2:
- Remove phy-names
- Add an example

 Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml b/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
index 426f90a47f35..cc50795d170b 100644
--- a/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/xlnx,nwl-pcie.yaml
@@ -61,6 +61,11 @@ properties:
   interrupt-map:
     maxItems: 4
 
+  phys:
+    minItems: 1
+    maxItems: 4
+    description: One phy per logical lane, in order
+
   power-domains:
     maxItems: 1
 
@@ -110,6 +115,7 @@ examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/phy/phy.h>
     #include <dt-bindings/power/xlnx-zynqmp-power.h>
     soc {
         #address-cells = <2>;
@@ -138,6 +144,7 @@ examples:
                             <0x0 0x0 0x0 0x3 &pcie_intc 0x3>,
                             <0x0 0x0 0x0 0x4 &pcie_intc 0x4>;
             msi-parent = <&nwl_pcie>;
+            phys = <&psgtr 0 PHY_TYPE_PCIE 0 0>;
             power-domains = <&zynqmp_firmware PD_PCIE>;
             iommus = <&smmu 0x4d0>;
             pcie_intc: legacy-interrupt-controller {
-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 2/7] PCI: xilinx-nwl: Fix off-by-one in IRQ handler

[Sean Anderson]

MSGF_LEG_MASK is laid out with INTA in bit 0, INTB in bit 1, INTC in bit
2, and INTD in bit 3. Hardware IRQ numbers start at 0, and we register
PCI_NUM_INTX irqs. So to enable INTA (aka hwirq 0) we should set bit 0.
Remove the subtraction of one.

This bug would cause legacy interrupts not to be delivered, as enabling
INTB would actually enable INTA, and enabling INTA wouldn't enable
anything at all. It is likely that this got overlooked for so long since
most PCIe hardware uses MSIs. This fixes the following UBSAN error:

UBSAN: shift-out-of-bounds in ../drivers/pci/controller/pcie-xilinx-nwl.c:389:11
shift exponent 18446744073709551615 is too large for 32-bit type 'int'
CPU: 1 PID: 61 Comm: kworker/u10:1 Not tainted 6.6.20+ #268
Hardware name: xlnx,zynqmp (DT)
Workqueue: events_unbound deferred_probe_work_func
Call trace:
dump_backtrace (arch/arm64/kernel/stacktrace.c:235)
show_stack (arch/arm64/kernel/stacktrace.c:242)
dump_stack_lvl (lib/dump_stack.c:107)
dump_stack (lib/dump_stack.c:114)
__ubsan_handle_shift_out_of_bounds (lib/ubsan.c:218 lib/ubsan.c:387)
nwl_unmask_leg_irq (drivers/pci/controller/pcie-xilinx-nwl.c:389 (discriminator 1))
irq_enable (kernel/irq/internals.h:234 kernel/irq/chip.c:170 kernel/irq/chip.c:439 kernel/irq/chip.c:432 kernel/irq/chip.c:345)
__irq_startup (kernel/irq/internals.h:239 kernel/irq/chip.c:180 kernel/irq/chip.c:250)
irq_startup (kernel/irq/chip.c:270)
__setup_irq (kernel/irq/manage.c:1800)
request_threaded_irq (kernel/irq/manage.c:2206)
pcie_pme_probe (include/linux/interrupt.h:168 drivers/pci/pcie/pme.c:348)
<snip>

Fixes: 9a181e1093af ("PCI: xilinx-nwl: Modify IRQ chip for legacy interrupts")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

Changes in v4:
- Explain likely effects of the off-by-one error
- Trim down UBSAN backtrace

Changes in v3:
- Expand commit message

 drivers/pci/controller/pcie-xilinx-nwl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index 0408f4d612b5..437927e3bcca 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -371,7 +371,7 @@ 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 +385,7 @@ 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);
-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 3/7] PCI: xilinx-nwl: Fix register misspelling

[Sean Anderson]

MSIC -> MISC

Fixes: c2a7ff18edcd ("PCI: xilinx-nwl: Expand error logging")
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

(no changes since v1)

 drivers/pci/controller/pcie-xilinx-nwl.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index 437927e3bcca..ce881baac6d8 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -80,8 +80,8 @@
 #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 +96,8 @@
 					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)
@@ -299,10 +299,10 @@ static irqreturn_t nwl_pcie_misc_handler(int irq, void *data)
 	if (misc_stat & MSGF_MISC_SR_FATAL_DEV)
 		dev_err(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 */
-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 4/7] PCI: xilinx-nwl: Rate-limit misc interrupt messages

[Sean Anderson]

The conditions logged by the misc interrupt can occur repeatedly and
continuously. Avoid rendering the console unusable by rate-limiting
these messages.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

(no changes since v1)

 drivers/pci/controller/pcie-xilinx-nwl.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index ce881baac6d8..c0a60cebdb2e 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -267,37 +267,37 @@ 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_MISC_SR_LINK_AUTO_BWIDTH)
 		dev_info(dev, "Link Autonomous Bandwidth Management Status bit set\n");
-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 5/7] PCI: xilinx-nwl: Clean up clock on probe failure/removal

[Sean Anderson]

Make sure we turn off the clock on probe failure and device removal.

Fixes: de0a01f52966 ("PCI: xilinx-nwl: Enable the clock through CCF")
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

Changes in v4:
- Move if to after pci_host_probe

 drivers/pci/controller/pcie-xilinx-nwl.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index c0a60cebdb2e..e85158dc4e6c 100644
--- a/drivers/pci/controller/pcie-xilinx-nwl.c
+++ b/drivers/pci/controller/pcie-xilinx-nwl.c
@@ -779,6 +779,7 @@ 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;
 
@@ -801,13 +802,13 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 	err = nwl_pcie_bridge_init(pcie);
 	if (err) {
 		dev_err(dev, "HW Initialization failed\n");
-		return err;
+		goto err_clk;
 	}
 
 	err = nwl_pcie_init_irq_domain(pcie);
 	if (err) {
 		dev_err(dev, "Failed creating IRQ Domain\n");
-		return err;
+		goto err_clk;
 	}
 
 	bridge->sysdata = pcie;
@@ -817,11 +818,24 @@ 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_clk;
 		}
 	}
 
-	return pci_host_probe(bridge);
+	err = pci_host_probe(bridge);
+	if (!err)
+		return 0;
+
+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);
+
+	clk_disable_unprepare(pcie->clk);
 }
 
 static struct platform_driver nwl_pcie_driver = {
@@ -831,5 +845,6 @@ 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);
-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 6/7] PCI: xilinx-nwl: Add phy support

[Sean Anderson]

Add support for enabling/disabling PCIe phys. We can't really do
anything about failures in the disable/remove path, so just print an
error.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
---

Changes in v4:
- Remove if in err_phy
- Fix error path in phy_enable skipping the first phy
- Disable phys in reverse order
- Use dev_err instead of WARN for errors

Changes in v2:
- Get phys by index and not by name

 drivers/pci/controller/pcie-xilinx-nwl.c | 84 +++++++++++++++++++++++-
 1 file changed, 81 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pcie-xilinx-nwl.c b/drivers/pci/controller/pcie-xilinx-nwl.c
index e85158dc4e6c..d17630357999 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>
 
@@ -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 */
@@ -521,6 +523,60 @@ 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;
@@ -732,6 +788,7 @@ 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);
@@ -759,6 +816,18 @@ 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;
 }
 
@@ -799,16 +868,22 @@ 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");
-		goto err_clk;
+		goto err_phy;
 	}
 
 	err = nwl_pcie_init_irq_domain(pcie);
 	if (err) {
 		dev_err(dev, "Failed creating IRQ Domain\n");
-		goto err_clk;
+		goto err_phy;
 	}
 
 	bridge->sysdata = pcie;
@@ -818,7 +893,7 @@ 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);
-			goto err_clk;
+			goto err_phy;
 		}
 	}
 
@@ -826,6 +901,8 @@ static int nwl_pcie_probe(struct platform_device *pdev)
 	if (!err)
 		return 0;
 
+err_phy:
+	nwl_pcie_phy_disable(pcie);
 err_clk:
 	clk_disable_unprepare(pcie->clk);
 	return err;
@@ -835,6 +912,7 @@ 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);
 }
 
-- 
2.35.1.1320.gc452695387.dirty


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[PATCH v4 7/7] arm64: zynqmp: Add PCIe phys

[Sean Anderson]

Add PCIe phy bindings for the ZCU102.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Tested-by: thippeswamy.havalige@amd.com
---

(no changes since v2)

Changes in v2:
- Remove phy-names

 arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
index ad8f23a0ec67..d2175f3dd099 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
@@ -941,6 +941,7 @@ conf-pull-none {
 
 &pcie {
 	status = "okay";
+	phys = <&psgtr 0 PHY_TYPE_PCIE 0 0>;
 };
 
 &psgtr {
-- 
2.35.1.1320.gc452695387.dirty


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Re: [PATCH v4 6/7] PCI: xilinx-nwl: Add phy support

[Markus Elfring]

> Add support for enabling/disabling PCIe phys. We can't really do
> anything about failures in the disable/remove path, so just print an
> error.

You propose to extend the exception handling.
Does such information indicate a need for another tag “Fixes”?


Would you become more interested in the application of scope-based resource management?

Regards,
Markus

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Re: [PATCH v4 7/7] arm64: zynqmp: Add PCIe phys

[Michal Simek]

On 5/31/24 18:13, Sean Anderson wrote:
> Add PCIe phy bindings for the ZCU102.
> 
> Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
> Tested-by: thippeswamy.havalige@amd.com
> ---
> 
> (no changes since v2)
> 
> Changes in v2:
> - Remove phy-names
> 
>   arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
> index ad8f23a0ec67..d2175f3dd099 100644
> --- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
> +++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
> @@ -941,6 +941,7 @@ conf-pull-none {
>   
>   &pcie {
>   	status = "okay";
> +	phys = <&psgtr 0 PHY_TYPE_PCIE 0 0>;
>   };
>   
>   &psgtr {

Acked-by: Michal Simek <michal.simek@amd.com>

Thanks,
Michal

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Re: [PATCH v4 0/7] PCI: xilinx-nwl: Add phy support

[Sean Anderson]

On 5/31/24 12:13, Sean Anderson wrote:
> Add phy subsystem support for the xilinx-nwl PCIe controller. This
> series also includes several small fixes and improvements.
> 
> Changes in v4:
> - Clarify dt-bindings commit subject/message
> - Explain likely effects of the off-by-one error
> - Trim down UBSAN backtrace
> - Move if to after pci_host_probe
> - Remove if in err_phy
> - Fix error path in phy_enable skipping the first phy
> - Disable phys in reverse order
> - Use dev_err instead of WARN for errors
> 
> Changes in v3:
> - Document phys property
> - Expand off-by-one commit message
> 
> Changes in v2:
> - Remove phy-names
> - Add an example
> - Get phys by index and not by name
> 
> Sean Anderson (7):
>   dt-bindings: pci: xilinx-nwl: Add phys property
>   PCI: xilinx-nwl: Fix off-by-one in IRQ handler
>   PCI: xilinx-nwl: Fix register misspelling
>   PCI: xilinx-nwl: Rate-limit misc interrupt messages
>   PCI: xilinx-nwl: Clean up clock on probe failure/removal
>   PCI: xilinx-nwl: Add phy support
>   arm64: zynqmp: Add PCIe phys
> 
>  .../bindings/pci/xlnx,nwl-pcie.yaml           |   7 +
>  .../boot/dts/xilinx/zynqmp-zcu102-revA.dts    |   1 +
>  drivers/pci/controller/pcie-xilinx-nwl.c      | 139 +++++++++++++++---
>  3 files changed, 124 insertions(+), 23 deletions(-)
> 

ping.

--Sean

Re: [PATCH v4 0/7] PCI: xilinx-nwl: Add phy support

[Bjorn Helgaas]

On Fri, May 31, 2024 at 12:13:30PM -0400, Sean Anderson wrote:
> Add phy subsystem support for the xilinx-nwl PCIe controller. This
> series also includes several small fixes and improvements.
> 
> Changes in v4:
> - Clarify dt-bindings commit subject/message
> - Explain likely effects of the off-by-one error
> - Trim down UBSAN backtrace
> - Move if to after pci_host_probe
> - Remove if in err_phy
> - Fix error path in phy_enable skipping the first phy
> - Disable phys in reverse order
> - Use dev_err instead of WARN for errors
> 
> Changes in v3:
> - Document phys property
> - Expand off-by-one commit message
> 
> Changes in v2:
> - Remove phy-names
> - Add an example
> - Get phys by index and not by name
> 
> Sean Anderson (7):
>   dt-bindings: pci: xilinx-nwl: Add phys property
>   PCI: xilinx-nwl: Fix off-by-one in IRQ handler
>   PCI: xilinx-nwl: Fix register misspelling
>   PCI: xilinx-nwl: Rate-limit misc interrupt messages
>   PCI: xilinx-nwl: Clean up clock on probe failure/removal
>   PCI: xilinx-nwl: Add phy support

Applied the above to pci/controller/xilinx for v6.12, thanks!

I assume the DTS update below should go via some other tree, but let
me know if I should pick it up.

>   arm64: zynqmp: Add PCIe phys
> 
>  .../bindings/pci/xlnx,nwl-pcie.yaml           |   7 +
>  .../boot/dts/xilinx/zynqmp-zcu102-revA.dts    |   1 +
>  drivers/pci/controller/pcie-xilinx-nwl.c      | 139 +++++++++++++++---
>  3 files changed, 124 insertions(+), 23 deletions(-)

Re: [PATCH v4 0/7] PCI: xilinx-nwl: Add phy support

[Michal Simek]

Hi Bjorn,

On 8/9/24 21:54, Bjorn Helgaas wrote:
> On Fri, May 31, 2024 at 12:13:30PM -0400, Sean Anderson wrote:
>> Add phy subsystem support for the xilinx-nwl PCIe controller. This
>> series also includes several small fixes and improvements.
>>
>> Changes in v4:
>> - Clarify dt-bindings commit subject/message
>> - Explain likely effects of the off-by-one error
>> - Trim down UBSAN backtrace
>> - Move if to after pci_host_probe
>> - Remove if in err_phy
>> - Fix error path in phy_enable skipping the first phy
>> - Disable phys in reverse order
>> - Use dev_err instead of WARN for errors
>>
>> Changes in v3:
>> - Document phys property
>> - Expand off-by-one commit message
>>
>> Changes in v2:
>> - Remove phy-names
>> - Add an example
>> - Get phys by index and not by name
>>
>> Sean Anderson (7):
>>    dt-bindings: pci: xilinx-nwl: Add phys property
>>    PCI: xilinx-nwl: Fix off-by-one in IRQ handler
>>    PCI: xilinx-nwl: Fix register misspelling
>>    PCI: xilinx-nwl: Rate-limit misc interrupt messages
>>    PCI: xilinx-nwl: Clean up clock on probe failure/removal
>>    PCI: xilinx-nwl: Add phy support
> 
> Applied the above to pci/controller/xilinx for v6.12, thanks!
> 
> I assume the DTS update below should go via some other tree, but let
> me know if I should pick it up.

Would be good if you can pick it up with the series together.
I have already acked that patch before.

Thanks,
Michal

Re: [PATCH v4 0/7] PCI: xilinx-nwl: Add phy support

[Bjorn Helgaas]

On Fri, Aug 30, 2024 at 04:08:08PM +0200, Michal Simek wrote:
> Hi Bjorn,
> 
> On 8/9/24 21:54, Bjorn Helgaas wrote:
> > On Fri, May 31, 2024 at 12:13:30PM -0400, Sean Anderson wrote:
> > > Add phy subsystem support for the xilinx-nwl PCIe controller. This
> > > series also includes several small fixes and improvements.
> > > 
> > > Changes in v4:
> > > - Clarify dt-bindings commit subject/message
> > > - Explain likely effects of the off-by-one error
> > > - Trim down UBSAN backtrace
> > > - Move if to after pci_host_probe
> > > - Remove if in err_phy
> > > - Fix error path in phy_enable skipping the first phy
> > > - Disable phys in reverse order
> > > - Use dev_err instead of WARN for errors
> > > 
> > > Changes in v3:
> > > - Document phys property
> > > - Expand off-by-one commit message
> > > 
> > > Changes in v2:
> > > - Remove phy-names
> > > - Add an example
> > > - Get phys by index and not by name
> > > 
> > > Sean Anderson (7):
> > >    dt-bindings: pci: xilinx-nwl: Add phys property
> > >    PCI: xilinx-nwl: Fix off-by-one in IRQ handler
> > >    PCI: xilinx-nwl: Fix register misspelling
> > >    PCI: xilinx-nwl: Rate-limit misc interrupt messages
> > >    PCI: xilinx-nwl: Clean up clock on probe failure/removal
> > >    PCI: xilinx-nwl: Add phy support
> > 
> > Applied the above to pci/controller/xilinx for v6.12, thanks!
> > 
> > I assume the DTS update below should go via some other tree, but let
> > me know if I should pick it up.
> 
> Would be good if you can pick it up with the series together.
> I have already acked that patch before.

Thanks, I picked up patch 7/7 "arm64: zynqmp: Add PCIe phys" as well!

Bjorn