[PATCH v2 0/8] usb: xhci: Port Register Set improvements

[PATCH v2 0/8] usb: xhci: Port Register Set improvements

[Niklas Neronin]

The aim of this patch set is to introduce tracing for PORTSC writes and 
implement a Port Register Set struct. This is the first part in a larger
series of changes.

Introduces a new struct for the Host Controller USB Port Register Set.
The current implementation accesses these registers through a single
'__le32' pointer, which, in conjunction with a macro, navigates to the
specific register using (base address + offset).

 Currently, how its accessed	| Register Name
--------------------------------------------------------------------------
 port->addr			| Port Status and Control
 port->addr + PORTPMSC		| Port Power Management Status and Control
 port->addr + PORTLI		| Port Link Info
 port->addr + PORTHLPMC		| Port Hardware LPM Control

 After, how its accessed	| Register Name
--------------------------------------------------------------------------
 port->port_reg->portsc		| Port Status and Control
 port->port_reg->portpmsc	| Port Power Management Status and Control
 port->port_reg->portli		| Port Link Info
 port->port_reg->porthlmpc	| Port Hardware LPM Control

These changes make it easier for future modification and their review.

Note:
I have chosen to split the struct changes across three separate commits
due to the substantial number of modified lines. Personally, I find that
minor typos are more likely to occur when dealing with larger patches.
However, I am open to consolidating these patches into a single commit
after review.

v2 changes:
 * Fix acronym spelling to PORTSC from PORTCS, in all commit messages.
 * Add patch introducing xhci_get_portsc().

Niklas Neronin (8):
  usb: xhci: correct indentation for PORTSC tracing function
  usb: xhci: align PORTSC trace with one-based port numbering
  usb: xhci: improve xhci_decode_portsc()
  usb: xhci: add tracing for PORTSC register writes
  usb: xhci: add PORTSC read function
  usb: xhci: add USB Port Register Set struct
  usb: xhci: implement USB Port Register Set struct
  usb: xhci: rename Port Register Set pointer in struct 'xhci_port'

 drivers/usb/host/xhci-debugfs.c |   6 +-
 drivers/usb/host/xhci-hub.c     | 115 ++++++++++++++++----------------
 drivers/usb/host/xhci-mem.c     |   3 +-
 drivers/usb/host/xhci-pci.c     |   4 +-
 drivers/usb/host/xhci-ring.c    |   2 +-
 drivers/usb/host/xhci-tegra.c   |  12 ++--
 drivers/usb/host/xhci-trace.h   |  39 ++++++-----
 drivers/usb/host/xhci.c         |  46 ++++++++-----
 drivers/usb/host/xhci.h         |  95 +++++++++++++-------------
 9 files changed, 167 insertions(+), 155 deletions(-)

-- 
2.50.1

[PATCH v2 1/8] usb: xhci: correct indentation for PORTSC tracing function

[Niklas Neronin]

Correct the indentation in USB Port Register Set (PORTSC) tracing.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-trace.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index bfb5c5c17012..f303ce600ff5 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -541,23 +541,23 @@ DEFINE_EVENT(xhci_log_ring, xhci_inc_deq,
 );
 
 DECLARE_EVENT_CLASS(xhci_log_portsc,
-		    TP_PROTO(struct xhci_port *port, u32 portsc),
-		    TP_ARGS(port, portsc),
-		    TP_STRUCT__entry(
-				     __field(u32, busnum)
-				     __field(u32, portnum)
-				     __field(u32, portsc)
-				     ),
-		    TP_fast_assign(
-				   __entry->busnum = port->rhub->hcd->self.busnum;
-				   __entry->portnum = port->hcd_portnum;
-				   __entry->portsc = portsc;
-				   ),
-		    TP_printk("port %d-%d: %s",
-			      __entry->busnum,
-			      __entry->portnum,
-			      xhci_decode_portsc(__get_buf(XHCI_MSG_MAX), __entry->portsc)
-			      )
+	TP_PROTO(struct xhci_port *port, u32 portsc),
+	TP_ARGS(port, portsc),
+	TP_STRUCT__entry(
+		__field(u32, busnum)
+		__field(u32, portnum)
+		__field(u32, portsc)
+	),
+	TP_fast_assign(
+		__entry->busnum = port->rhub->hcd->self.busnum;
+		__entry->portnum = port->hcd_portnum;
+		__entry->portsc = portsc;
+	),
+	TP_printk("port %d-%d: %s",
+		__entry->busnum,
+		__entry->portnum,
+		xhci_decode_portsc(__get_buf(XHCI_MSG_MAX), __entry->portsc)
+	)
 );
 
 DEFINE_EVENT(xhci_log_portsc, xhci_handle_port_status,
-- 
2.50.1

[PATCH v2 2/8] usb: xhci: align PORTSC trace with one-based port numbering

[Niklas Neronin]

In the xHCI driver, port numbers are typically described using a one-based
index. However, tracing currently uses a zero-based index. To ensure
consistency between tracing and dynamic debugging, update the trace port
number to use a one-based index.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-trace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index f303ce600ff5..9abc904f1749 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -550,7 +550,7 @@ DECLARE_EVENT_CLASS(xhci_log_portsc,
 	),
 	TP_fast_assign(
 		__entry->busnum = port->rhub->hcd->self.busnum;
-		__entry->portnum = port->hcd_portnum;
+		__entry->portnum = port->hcd_portnum + 1;
 		__entry->portsc = portsc;
 	),
 	TP_printk("port %d-%d: %s",
-- 
2.50.1

[PATCH v2 3/8] usb: xhci: improve xhci_decode_portsc()

[Niklas Neronin]

This patch improves xhci_decode_portsc(), which is used in PORTSC tracing.
The upcoming patch will add tracing to all PORTSC writes.

Read-Write 1 to Clear (RW1C) bits are now grouped together and prefixed
with "RW1C: " if needed. This is because the meaning of a set RW1C bit
differs between reading and writing. For instance, when reading 'PORT_PE',
a value of '1' indicates the port is enabled, while '0' means it is
disabled. Conversely, writing a '1' to 'PORT_PE' signifies that the port
is being disabled.

Add Port Link State Write Strobe (LWS) to the decoder.

Simplify and reduce the length of the message.

==== Examples ====

Before:
0x00201203 Powered Connected Enabled Link:U0 PortSpeed:4 Change: PRC Wake:
0x0a0002a0 Powered Not-connected Disabled Link:RxDetect PortSpeed:0 \
 Change: Wake: WCE WOE

After:
0x00201203 Power:1 Connect:1 Link:U0 Speed:4 RW1C: PED PRC
0x0a0002a0 Power:1 Connect:0 Link:RxDetect Speed:0 WCE WOE

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci.h | 52 +++++++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 23 deletions(-)

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 85d5b964bf1e..7a245745b289 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -2396,37 +2396,22 @@ static inline const char *xhci_decode_portsc(char *str, u32 portsc)
 	if (portsc == ~(u32)0)
 		return str;
 
-	ret += sprintf(str + ret, "%s %s %s Link:%s PortSpeed:%d ",
-		      portsc & PORT_POWER	? "Powered" : "Powered-off",
-		      portsc & PORT_CONNECT	? "Connected" : "Not-connected",
-		      portsc & PORT_PE		? "Enabled" : "Disabled",
+	ret += sprintf(str + ret, "Power:%d Connect:%d Link:%s Speed:%d ",
+		      !!(portsc & PORT_POWER),
+		      !!(portsc & PORT_CONNECT),
 		      xhci_portsc_link_state_string(portsc),
 		      DEV_PORT_SPEED(portsc));
 
-	if (portsc & PORT_OC)
-		ret += sprintf(str + ret, "OverCurrent ");
+	/* Read-Write 1 to Set */
 	if (portsc & PORT_RESET)
 		ret += sprintf(str + ret, "In-Reset ");
 
-	ret += sprintf(str + ret, "Change: ");
-	if (portsc & PORT_CSC)
-		ret += sprintf(str + ret, "CSC ");
-	if (portsc & PORT_PEC)
-		ret += sprintf(str + ret, "PEC ");
-	if (portsc & PORT_WRC)
-		ret += sprintf(str + ret, "WRC ");
-	if (portsc & PORT_OCC)
-		ret += sprintf(str + ret, "OCC ");
-	if (portsc & PORT_RC)
-		ret += sprintf(str + ret, "PRC ");
-	if (portsc & PORT_PLC)
-		ret += sprintf(str + ret, "PLC ");
-	if (portsc & PORT_CEC)
-		ret += sprintf(str + ret, "CEC ");
+	if (portsc & PORT_OC)
+		ret += sprintf(str + ret, "OCA ");
+	if (portsc & PORT_LINK_STROBE)
+		ret += sprintf(str + ret, "LWS ");
 	if (portsc & PORT_CAS)
 		ret += sprintf(str + ret, "CAS ");
-
-	ret += sprintf(str + ret, "Wake: ");
 	if (portsc & PORT_WKCONN_E)
 		ret += sprintf(str + ret, "WCE ");
 	if (portsc & PORT_WKDISC_E)
@@ -2434,6 +2419,27 @@ static inline const char *xhci_decode_portsc(char *str, u32 portsc)
 	if (portsc & PORT_WKOC_E)
 		ret += sprintf(str + ret, "WOE ");
 
+	/* Read-Write 1 to Clear */
+	if (portsc & (PORT_PE | PORT_CHANGE_MASK)) {
+		ret += sprintf(str + ret, "RW1C: ");
+		if (portsc & PORT_PE)
+			ret += sprintf(str + ret, "PED ");
+		if (portsc & PORT_CSC)
+			ret += sprintf(str + ret, "CSC ");
+		if (portsc & PORT_PEC)
+			ret += sprintf(str + ret, "PEC ");
+		if (portsc & PORT_WRC)
+			ret += sprintf(str + ret, "WRC ");
+		if (portsc & PORT_OCC)
+			ret += sprintf(str + ret, "OCC ");
+		if (portsc & PORT_RC)
+			ret += sprintf(str + ret, "PRC ");
+		if (portsc & PORT_PLC)
+			ret += sprintf(str + ret, "PLC ");
+		if (portsc & PORT_CEC)
+			ret += sprintf(str + ret, "CEC ");
+	}
+
 	return str;
 }
 
-- 
2.50.1

[PATCH v2 4/8] usb: xhci: add tracing for PORTSC register writes

[Niklas Neronin]

Introduce a dedicated write function for the USB Port Register Set
(PORTSC) that includes tracing capabilities for values written to the
PORTSC register. This enhancement minimizes code duplication and improves
debugging.

The PORTSC register is part of the Host Controller USB Port Register Set,
comprising 4 x 32-bit registers. As the first register, PORTSC is accessed
directly via 'port->addr'. Future commits will introduce a dedicated
Port register struct to further streamline access.
By adding the xhci_set_portsc() function prior to these changes, we
significantly reduce the number of same line modifications required.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-debugfs.c |  2 +-
 drivers/usb/host/xhci-hub.c     | 33 ++++++++++++++++-----------------
 drivers/usb/host/xhci-pci.c     |  2 +-
 drivers/usb/host/xhci-trace.h   |  5 +++++
 drivers/usb/host/xhci.c         |  8 +++++++-
 drivers/usb/host/xhci.h         |  1 +
 6 files changed, 31 insertions(+), 20 deletions(-)

diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c
index c6d44977193f..11edb5c54cfa 100644
--- a/drivers/usb/host/xhci-debugfs.c
+++ b/drivers/usb/host/xhci-debugfs.c
@@ -367,7 +367,7 @@ static ssize_t xhci_port_write(struct file *file,  const char __user *ubuf,
 		portsc = xhci_port_state_to_neutral(portsc);
 		portsc &= ~PORT_PLS_MASK;
 		portsc |= PORT_LINK_STROBE | XDEV_COMP_MODE;
-		writel(portsc, port->addr);
+		xhci_set_portsc(port, portsc);
 		spin_unlock_irqrestore(&xhci->lock, flags);
 	} else {
 		return -EINVAL;
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index b3a59ce1b3f4..b91883f8ec3f 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -570,7 +570,7 @@ static void xhci_disable_port(struct xhci_hcd *xhci, struct xhci_port *port)
 	portsc = xhci_port_state_to_neutral(portsc);
 
 	/* Write 1 to disable the port */
-	writel(portsc | PORT_PE, port->addr);
+	xhci_set_portsc(port, portsc | PORT_PE);
 
 	portsc = readl(port->addr);
 	xhci_dbg(xhci, "disable port %d-%d, portsc: 0x%x\n",
@@ -578,7 +578,7 @@ static void xhci_disable_port(struct xhci_hcd *xhci, struct xhci_port *port)
 }
 
 static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
-		u16 wIndex, __le32 __iomem *addr, u32 port_status)
+		u16 wIndex, struct xhci_port *port, u32 port_status)
 {
 	char *port_change_bit;
 	u32 status;
@@ -621,8 +621,8 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
 		return;
 	}
 	/* Change bits are all write 1 to clear */
-	writel(port_status | status, addr);
-	port_status = readl(addr);
+	xhci_set_portsc(port, port_status | status);
+	port_status = readl(port->addr);
 
 	xhci_dbg(xhci, "clear port%d %s change, portsc: 0x%x\n",
 		 wIndex + 1, port_change_bit, port_status);
@@ -659,11 +659,11 @@ static void xhci_set_port_power(struct xhci_hcd *xhci, struct xhci_port *port,
 
 	if (on) {
 		/* Power on */
-		writel(temp | PORT_POWER, port->addr);
+		xhci_set_portsc(port, temp | PORT_POWER);
 		readl(port->addr);
 	} else {
 		/* Power off */
-		writel(temp & ~PORT_POWER, port->addr);
+		xhci_set_portsc(port, temp & ~PORT_POWER);
 	}
 
 	spin_unlock_irqrestore(&xhci->lock, *flags);
@@ -805,7 +805,7 @@ void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
 	temp = xhci_port_state_to_neutral(portsc);
 	temp &= ~PORT_PLS_MASK;
 	temp |= PORT_LINK_STROBE | link_state;
-	writel(temp, port->addr);
+	xhci_set_portsc(port, temp);
 
 	xhci_dbg(xhci, "Set port %d-%d link state, portsc: 0x%x, write 0x%x",
 		 port->rhub->hcd->self.busnum, port->hcd_portnum + 1,
@@ -835,7 +835,7 @@ static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
 	else
 		temp &= ~PORT_WKOC_E;
 
-	writel(temp, port->addr);
+	xhci_set_portsc(port, temp);
 }
 
 /* Test and clear port RWC bit */
@@ -848,7 +848,7 @@ void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port,
 	if (temp & port_bit) {
 		temp = xhci_port_state_to_neutral(temp);
 		temp |= port_bit;
-		writel(temp, port->addr);
+		xhci_set_portsc(port, temp);
 	}
 }
 
@@ -1371,7 +1371,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				temp |= PORT_CSC | PORT_PEC | PORT_WRC |
 					PORT_OCC | PORT_RC | PORT_PLC |
 					PORT_CEC;
-				writel(temp | PORT_PE, port->addr);
+				xhci_set_portsc(port, temp | PORT_PE);
 				temp = readl(port->addr);
 				break;
 			}
@@ -1500,7 +1500,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			break;
 		case USB_PORT_FEAT_RESET:
 			temp = (temp | PORT_RESET);
-			writel(temp, port->addr);
+			xhci_set_portsc(port, temp);
 
 			temp = readl(port->addr);
 			xhci_dbg(xhci, "set port reset, actual port %d-%d status  = 0x%x\n",
@@ -1514,7 +1514,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			break;
 		case USB_PORT_FEAT_BH_PORT_RESET:
 			temp |= PORT_WR;
-			writel(temp, port->addr);
+			xhci_set_portsc(port, temp);
 			temp = readl(port->addr);
 			break;
 		case USB_PORT_FEAT_U1_TIMEOUT:
@@ -1603,8 +1603,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		case USB_PORT_FEAT_C_ENABLE:
 		case USB_PORT_FEAT_C_PORT_LINK_STATE:
 		case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
-			xhci_clear_port_change_bit(xhci, wValue, wIndex,
-					port->addr, temp);
+			xhci_clear_port_change_bit(xhci, wValue, wIndex, port, temp);
 			break;
 		case USB_PORT_FEAT_ENABLE:
 			xhci_disable_port(xhci, port);
@@ -1829,7 +1828,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
 				spin_lock_irqsave(&xhci->lock, flags);
 			}
 		}
-		writel(portsc_buf[port_index], ports[port_index]->addr);
+		xhci_set_portsc(ports[port_index], portsc_buf[port_index]);
 	}
 	hcd->state = HC_STATE_SUSPENDED;
 	bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
@@ -1863,7 +1862,7 @@ static bool xhci_port_missing_cas_quirk(struct xhci_port *port)
 	/* clear wakeup/change bits, and do a warm port reset */
 	portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
 	portsc |= PORT_WR;
-	writel(portsc, port->addr);
+	xhci_set_portsc(port, portsc);
 	/* flush write */
 	readl(port->addr);
 	return true;
@@ -1942,7 +1941,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
 			}
 		/* disable wake for all ports, write new link state if needed */
 		portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
-		writel(portsc, ports[port_index]->addr);
+		xhci_set_portsc(ports[port_index], portsc);
 	}
 
 	/* USB2 specific resume signaling delay and U0 link state transition */
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 00fac8b233d2..4df8dfd13443 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -912,7 +912,7 @@ static int xhci_pci_poweroff_late(struct usb_hcd *hcd, bool do_wakeup)
 		xhci_dbg(xhci, "port %d-%d in U3 without wakeup, disable it\n",
 			 port->rhub->hcd->self.busnum, port->hcd_portnum + 1);
 		portsc = xhci_port_state_to_neutral(portsc);
-		writel(portsc | PORT_PE, port->addr);
+		xhci_set_portsc(port, portsc | PORT_PE);
 	}
 
 	return 0;
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 9abc904f1749..4d3abacf92c7 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -575,6 +575,11 @@ DEFINE_EVENT(xhci_log_portsc, xhci_hub_status_data,
 	     TP_ARGS(port, portsc)
 );
 
+DEFINE_EVENT(xhci_log_portsc, xhci_set_portsc,
+	     TP_PROTO(struct xhci_port *port, u32 portsc),
+	     TP_ARGS(port, portsc)
+);
+
 DECLARE_EVENT_CLASS(xhci_log_doorbell,
 	TP_PROTO(u32 slot, u32 doorbell),
 	TP_ARGS(slot, doorbell),
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 742c23826e17..c7ed662d9f65 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -41,6 +41,12 @@ static unsigned long long quirks;
 module_param(quirks, ullong, S_IRUGO);
 MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default");
 
+void xhci_set_portsc(struct xhci_port *port, u32 val)
+{
+	trace_xhci_set_portsc(port, val);
+	writel(val, port->addr);
+}
+
 static bool td_on_ring(struct xhci_td *td, struct xhci_ring *ring)
 {
 	struct xhci_segment *seg;
@@ -909,7 +915,7 @@ static void xhci_disable_hub_port_wake(struct xhci_hcd *xhci,
 			t2 |= PORT_CSC;
 
 		if (t1 != t2) {
-			writel(t2, rhub->ports[i]->addr);
+			xhci_set_portsc(rhub->ports[i], t2);
 			xhci_dbg(xhci, "config port %d-%d wake bits, portsc: 0x%x, write: 0x%x\n",
 				 rhub->hcd->self.busnum, i + 1, portsc, t2);
 		}
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 7a245745b289..065478086f76 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1958,6 +1958,7 @@ void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
 			      struct xhci_interrupter *ir,
 			      bool clear_ehb);
 void xhci_add_interrupter(struct xhci_hcd *xhci, unsigned int intr_num);
+void xhci_set_portsc(struct xhci_port *port, u32 val);
 
 /* xHCI roothub code */
 void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
-- 
2.50.1

[PATCH v2 5/8] usb: xhci: add PORTSC read function

[Niklas Neronin]

Introduce a dedicated read function for the USB Port Register Set (PORTSC).
This function is the mirror image of xhci_set_portsc().

Suggested-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-debugfs.c |  4 +-
 drivers/usb/host/xhci-hub.c     | 68 ++++++++++++++++-----------------
 drivers/usb/host/xhci-pci.c     |  2 +-
 drivers/usb/host/xhci-ring.c    |  2 +-
 drivers/usb/host/xhci-tegra.c   | 12 +++---
 drivers/usb/host/xhci.c         | 13 +++++--
 drivers/usb/host/xhci.h         |  1 +
 7 files changed, 54 insertions(+), 48 deletions(-)

diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c
index 11edb5c54cfa..85cb568d2c58 100644
--- a/drivers/usb/host/xhci-debugfs.c
+++ b/drivers/usb/host/xhci-debugfs.c
@@ -329,7 +329,7 @@ static int xhci_portsc_show(struct seq_file *s, void *unused)
 	u32			portsc;
 	char			str[XHCI_MSG_MAX];
 
-	portsc = readl(port->addr);
+	portsc = xhci_get_portsc(port);
 	seq_printf(s, "%s\n", xhci_decode_portsc(str, portsc));
 
 	return 0;
@@ -359,7 +359,7 @@ static ssize_t xhci_port_write(struct file *file,  const char __user *ubuf,
 			return count;
 		spin_lock_irqsave(&xhci->lock, flags);
 		/* compliance mode can only be enabled on ports in RxDetect */
-		portsc = readl(port->addr);
+		portsc = xhci_get_portsc(port);
 		if ((portsc & PORT_PLS_MASK) != XDEV_RXDETECT) {
 			spin_unlock_irqrestore(&xhci->lock, flags);
 			return -EPERM;
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index b91883f8ec3f..68fecda9d48d 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -299,7 +299,7 @@ static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
 	 */
 	memset(port_removable, 0, sizeof(port_removable));
 	for (i = 0; i < ports; i++) {
-		portsc = readl(rhub->ports[i]->addr);
+		portsc = xhci_get_portsc(rhub->ports[i]);
 		/* If a device is removable, PORTSC reports a 0, same as in the
 		 * hub descriptor DeviceRemovable bits.
 		 */
@@ -356,7 +356,7 @@ static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
 	port_removable = 0;
 	/* bit 0 is reserved, bit 1 is for port 1, etc. */
 	for (i = 0; i < ports; i++) {
-		portsc = readl(rhub->ports[i]->addr);
+		portsc = xhci_get_portsc(rhub->ports[i]);
 		if (portsc & PORT_DEV_REMOVE)
 			port_removable |= 1 << (i + 1);
 	}
@@ -566,13 +566,13 @@ static void xhci_disable_port(struct xhci_hcd *xhci, struct xhci_port *port)
 		return;
 	}
 
-	portsc = readl(port->addr);
+	portsc = xhci_get_portsc(port);
 	portsc = xhci_port_state_to_neutral(portsc);
 
 	/* Write 1 to disable the port */
 	xhci_set_portsc(port, portsc | PORT_PE);
 
-	portsc = readl(port->addr);
+	portsc = xhci_get_portsc(port);
 	xhci_dbg(xhci, "disable port %d-%d, portsc: 0x%x\n",
 		 hcd->self.busnum, port->hcd_portnum + 1, portsc);
 }
@@ -622,7 +622,7 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
 	}
 	/* Change bits are all write 1 to clear */
 	xhci_set_portsc(port, port_status | status);
-	port_status = readl(port->addr);
+	port_status = xhci_get_portsc(port);
 
 	xhci_dbg(xhci, "clear port%d %s change, portsc: 0x%x\n",
 		 wIndex + 1, port_change_bit, port_status);
@@ -650,7 +650,7 @@ static void xhci_set_port_power(struct xhci_hcd *xhci, struct xhci_port *port,
 	u32 temp;
 
 	hcd = port->rhub->hcd;
-	temp = readl(port->addr);
+	temp = xhci_get_portsc(port);
 
 	xhci_dbg(xhci, "set port power %d-%d %s, portsc: 0x%x\n",
 		 hcd->self.busnum, port->hcd_portnum + 1, on ? "ON" : "OFF", temp);
@@ -660,7 +660,7 @@ static void xhci_set_port_power(struct xhci_hcd *xhci, struct xhci_port *port,
 	if (on) {
 		/* Power on */
 		xhci_set_portsc(port, temp | PORT_POWER);
-		readl(port->addr);
+		xhci_get_portsc(port);
 	} else {
 		/* Power off */
 		xhci_set_portsc(port, temp & ~PORT_POWER);
@@ -801,7 +801,7 @@ void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
 	u32 temp;
 	u32 portsc;
 
-	portsc = readl(port->addr);
+	portsc = xhci_get_portsc(port);
 	temp = xhci_port_state_to_neutral(portsc);
 	temp &= ~PORT_PLS_MASK;
 	temp |= PORT_LINK_STROBE | link_state;
@@ -817,7 +817,7 @@ static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
 {
 	u32 temp;
 
-	temp = readl(port->addr);
+	temp = xhci_get_portsc(port);
 	temp = xhci_port_state_to_neutral(temp);
 
 	if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT)
@@ -844,7 +844,7 @@ void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port,
 {
 	u32 temp;
 
-	temp = readl(port->addr);
+	temp = xhci_get_portsc(port);
 	if (temp & port_bit) {
 		temp = xhci_port_state_to_neutral(temp);
 		temp |= port_bit;
@@ -1002,7 +1002,7 @@ static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
 			}
 			xhci_ring_device(xhci, port->slot_id);
 		} else {
-			int port_status = readl(port->addr);
+			int port_status = xhci_get_portsc(port);
 
 			xhci_warn(xhci, "Port resume timed out, port %d-%d: 0x%x\n",
 				  hcd->self.busnum, wIndex + 1, port_status);
@@ -1263,7 +1263,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 
 		wIndex--;
 		port = ports[portnum1 - 1];
-		temp = readl(port->addr);
+		temp = xhci_get_portsc(port);
 		if (temp == ~(u32)0) {
 			xhci_hc_died(xhci);
 			retval = -ENODEV;
@@ -1309,7 +1309,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 
 		port = ports[portnum1 - 1];
 		wIndex--;
-		temp = readl(port->addr);
+		temp = xhci_get_portsc(port);
 		if (temp == ~(u32)0) {
 			xhci_hc_died(xhci);
 			retval = -ENODEV;
@@ -1319,7 +1319,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		/* FIXME: What new port features do we need to support? */
 		switch (wValue) {
 		case USB_PORT_FEAT_SUSPEND:
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			if ((temp & PORT_PLS_MASK) != XDEV_U0) {
 				/* Resume the port to U0 first */
 				xhci_set_link_state(xhci, port, XDEV_U0);
@@ -1331,7 +1331,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			 * a port unless the port reports that it is in the
 			 * enabled (PED = ‘1’,PLS < ‘3’) state.
 			 */
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
 				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
 				xhci_warn(xhci, "USB core suspending port %d-%d not in U0/U1/U2\n",
@@ -1354,11 +1354,11 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			msleep(10); /* wait device to enter */
 			spin_lock_irqsave(&xhci->lock, flags);
 
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			bus_state->suspended_ports |= 1 << wIndex;
 			break;
 		case USB_PORT_FEAT_LINK_STATE:
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			/* Disable port */
 			if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
 				xhci_dbg(xhci, "Disable port %d-%d\n",
@@ -1372,7 +1372,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 					PORT_OCC | PORT_RC | PORT_PLC |
 					PORT_CEC;
 				xhci_set_portsc(port, temp | PORT_PE);
-				temp = readl(port->addr);
+				temp = xhci_get_portsc(port);
 				break;
 			}
 
@@ -1381,7 +1381,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				xhci_dbg(xhci, "Enable port %d-%d\n",
 					 hcd->self.busnum, portnum1);
 				xhci_set_link_state(xhci, port,	link_state);
-				temp = readl(port->addr);
+				temp = xhci_get_portsc(port);
 				break;
 			}
 
@@ -1414,7 +1414,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 					 hcd->self.busnum, portnum1);
 				xhci_set_link_state(xhci, port, link_state);
 
-				temp = readl(port->addr);
+				temp = xhci_get_portsc(port);
 				break;
 			}
 			/* Port must be enabled */
@@ -1462,7 +1462,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 					xhci_dbg(xhci, "missing U0 port change event for port %d-%d\n",
 						 hcd->self.busnum, portnum1);
 				spin_lock_irqsave(&xhci->lock, flags);
-				temp = readl(port->addr);
+				temp = xhci_get_portsc(port);
 				break;
 			}
 
@@ -1480,12 +1480,12 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				spin_unlock_irqrestore(&xhci->lock, flags);
 				while (retries--) {
 					usleep_range(4000, 8000);
-					temp = readl(port->addr);
+					temp = xhci_get_portsc(port);
 					if ((temp & PORT_PLS_MASK) == XDEV_U3)
 						break;
 				}
 				spin_lock_irqsave(&xhci->lock, flags);
-				temp = readl(port->addr);
+				temp = xhci_get_portsc(port);
 				bus_state->suspended_ports |= 1 << wIndex;
 			}
 			break;
@@ -1502,20 +1502,20 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			temp = (temp | PORT_RESET);
 			xhci_set_portsc(port, temp);
 
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			xhci_dbg(xhci, "set port reset, actual port %d-%d status  = 0x%x\n",
 				 hcd->self.busnum, portnum1, temp);
 			break;
 		case USB_PORT_FEAT_REMOTE_WAKE_MASK:
 			xhci_set_remote_wake_mask(xhci, port, wake_mask);
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			xhci_dbg(xhci, "set port remote wake mask, actual port %d-%d status  = 0x%x\n",
 				 hcd->self.busnum, portnum1, temp);
 			break;
 		case USB_PORT_FEAT_BH_PORT_RESET:
 			temp |= PORT_WR;
 			xhci_set_portsc(port, temp);
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			break;
 		case USB_PORT_FEAT_U1_TIMEOUT:
 			if (hcd->speed < HCD_USB3)
@@ -1547,7 +1547,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			goto error;
 		}
 		/* unblock any posted writes */
-		temp = readl(port->addr);
+		temp = xhci_get_portsc(port);
 		break;
 	case ClearPortFeature:
 		if (!portnum1 || portnum1 > max_ports)
@@ -1556,7 +1556,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		port = ports[portnum1 - 1];
 
 		wIndex--;
-		temp = readl(port->addr);
+		temp = xhci_get_portsc(port);
 		if (temp == ~(u32)0) {
 			xhci_hc_died(xhci);
 			retval = -ENODEV;
@@ -1566,7 +1566,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		temp = xhci_port_state_to_neutral(temp);
 		switch (wValue) {
 		case USB_PORT_FEAT_SUSPEND:
-			temp = readl(port->addr);
+			temp = xhci_get_portsc(port);
 			xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
 			xhci_dbg(xhci, "PORTSC %04x\n", temp);
 			if (temp & PORT_RESET)
@@ -1681,7 +1681,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
 
 	/* For each port, did anything change?  If so, set that bit in buf. */
 	for (i = 0; i < max_ports; i++) {
-		temp = readl(ports[i]->addr);
+		temp = xhci_get_portsc(ports[i]);
 		if (temp == ~(u32)0) {
 			xhci_hc_died(xhci);
 			retval = -ENODEV;
@@ -1750,7 +1750,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
 		u32 t1, t2;
 		int retries = 10;
 retry:
-		t1 = readl(ports[port_index]->addr);
+		t1 = xhci_get_portsc(ports[port_index]);
 		t2 = xhci_port_state_to_neutral(t1);
 		portsc_buf[port_index] = 0;
 
@@ -1849,7 +1849,7 @@ static bool xhci_port_missing_cas_quirk(struct xhci_port *port)
 {
 	u32 portsc;
 
-	portsc = readl(port->addr);
+	portsc = xhci_get_portsc(port);
 
 	/* if any of these are set we are not stuck */
 	if (portsc & (PORT_CONNECT | PORT_CAS))
@@ -1864,7 +1864,7 @@ static bool xhci_port_missing_cas_quirk(struct xhci_port *port)
 	portsc |= PORT_WR;
 	xhci_set_portsc(port, portsc);
 	/* flush write */
-	readl(port->addr);
+	xhci_get_portsc(port);
 	return true;
 }
 
@@ -1911,7 +1911,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
 	}
 	port_index = max_ports;
 	while (port_index--) {
-		portsc = readl(ports[port_index]->addr);
+		portsc = xhci_get_portsc(ports[port_index]);
 
 		/* warm reset CAS limited ports stuck in polling/compliance */
 		if ((xhci->quirks & XHCI_MISSING_CAS) &&
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 4df8dfd13443..33e74f854570 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -891,7 +891,7 @@ static int xhci_pci_poweroff_late(struct usb_hcd *hcd, bool do_wakeup)
 
 	for (i = 0; i < HCS_MAX_PORTS(xhci->hcs_params1); i++) {
 		port = &xhci->hw_ports[i];
-		portsc = readl(port->addr);
+		portsc = xhci_get_portsc(port);
 
 		if ((portsc & PORT_PLS_MASK) != XDEV_U3)
 			continue;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 4f8f5aab109d..d4058bacb561 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2028,7 +2028,7 @@ static void handle_port_status(struct xhci_hcd *xhci, union xhci_trb *event)
 	hcd = port->rhub->hcd;
 	bus_state = &port->rhub->bus_state;
 	hcd_portnum = port->hcd_portnum;
-	portsc = readl(port->addr);
+	portsc = xhci_get_portsc(port);
 
 	xhci_dbg(xhci, "Port change event, %d-%d, id %d, portsc: 0x%x\n",
 		 hcd->self.busnum, hcd_portnum + 1, port_id, portsc);
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 0c7af44d4dae..85e760e5ebaa 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1969,7 +1969,7 @@ static bool xhci_hub_ports_suspended(struct xhci_hub *hub)
 	u32 value;
 
 	for (i = 0; i < hub->num_ports; i++) {
-		value = readl(hub->ports[i]->addr);
+		value = xhci_get_portsc(hub->ports[i]);
 		if ((value & PORT_PE) == 0)
 			continue;
 
@@ -2095,7 +2095,7 @@ static void tegra_xhci_enable_phy_sleepwalk_wake(struct tegra_xusb *tegra)
 			if (!is_host_mode_phy(tegra, i, j))
 				continue;
 
-			portsc = readl(rhub->ports[index]->addr);
+			portsc = xhci_get_portsc(rhub->ports[index]);
 			speed = tegra_xhci_portsc_to_speed(tegra, portsc);
 			tegra_xusb_padctl_enable_phy_sleepwalk(padctl, phy, speed);
 			tegra_xusb_padctl_enable_phy_wake(padctl, phy);
@@ -2190,7 +2190,7 @@ static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool is_auto_resume)
 	for (i = 0; i < xhci->usb2_rhub.num_ports; i++) {
 		if (!xhci->usb2_rhub.ports[i])
 			continue;
-		portsc = readl(xhci->usb2_rhub.ports[i]->addr);
+		portsc = xhci_get_portsc(xhci->usb2_rhub.ports[i]);
 		tegra->lp0_utmi_pad_mask &= ~BIT(i);
 		if (((portsc & PORT_PLS_MASK) == XDEV_U3) || ((portsc & DEV_SPEED_MASK) == XDEV_FS))
 			tegra->lp0_utmi_pad_mask |= BIT(i);
@@ -2712,7 +2712,7 @@ static int tegra_xhci_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value,
 		while (i--) {
 			if (!test_bit(i, &bus_state->resuming_ports))
 				continue;
-			portsc = readl(ports[i]->addr);
+			portsc = xhci_get_portsc(ports[i]);
 			if ((portsc & PORT_PLS_MASK) == XDEV_RESUME)
 				tegra_phy_xusb_utmi_pad_power_on(
 					tegra_xusb_get_phy(tegra, "usb2", (int) i));
@@ -2730,7 +2730,7 @@ static int tegra_xhci_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value,
 			if (!index || index > rhub->num_ports)
 				return -EPIPE;
 			ports = rhub->ports;
-			portsc = readl(ports[port]->addr);
+			portsc = xhci_get_portsc(ports[port]);
 			if (portsc & PORT_CONNECT)
 				tegra_phy_xusb_utmi_pad_power_on(phy);
 		}
@@ -2749,7 +2749,7 @@ static int tegra_xhci_hub_control(struct usb_hcd *hcd, u16 type_req, u16 value,
 
 		if ((type_req == ClearPortFeature) && (value == USB_PORT_FEAT_C_CONNECTION)) {
 			ports = rhub->ports;
-			portsc = readl(ports[port]->addr);
+			portsc = xhci_get_portsc(ports[port]);
 			if (!(portsc & PORT_CONNECT)) {
 				/* We don't suspend the PAD while HNP role swap happens on the OTG
 				 * port
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index c7ed662d9f65..e43501a8ab55 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -47,6 +47,11 @@ void xhci_set_portsc(struct xhci_port *port, u32 val)
 	writel(val, port->addr);
 }
 
+u32 xhci_get_portsc(struct xhci_port *port)
+{
+	return readl(port->addr);
+}
+
 static bool td_on_ring(struct xhci_td *td, struct xhci_ring *ring)
 {
 	struct xhci_segment *seg;
@@ -379,7 +384,7 @@ static void compliance_mode_recovery(struct timer_list *t)
 		return;
 
 	for (i = 0; i < rhub->num_ports; i++) {
-		temp = readl(rhub->ports[i]->addr);
+		temp = xhci_get_portsc(rhub->ports[i]);
 		if ((temp & PORT_PLS_MASK) == USB_SS_PORT_LS_COMP_MOD) {
 			/*
 			 * Compliance Mode Detected. Letting USB Core
@@ -902,7 +907,7 @@ static void xhci_disable_hub_port_wake(struct xhci_hcd *xhci,
 	spin_lock_irqsave(&xhci->lock, flags);
 
 	for (i = 0; i < rhub->num_ports; i++) {
-		portsc = readl(rhub->ports[i]->addr);
+		portsc = xhci_get_portsc(rhub->ports[i]);
 		t1 = xhci_port_state_to_neutral(portsc);
 		t2 = t1;
 
@@ -942,7 +947,7 @@ static bool xhci_pending_portevent(struct xhci_hcd *xhci)
 	port_index = xhci->usb2_rhub.num_ports;
 	ports = xhci->usb2_rhub.ports;
 	while (port_index--) {
-		portsc = readl(ports[port_index]->addr);
+		portsc = xhci_get_portsc(ports[port_index]);
 		if (portsc & PORT_CHANGE_MASK ||
 		    (portsc & PORT_PLS_MASK) == XDEV_RESUME)
 			return true;
@@ -950,7 +955,7 @@ static bool xhci_pending_portevent(struct xhci_hcd *xhci)
 	port_index = xhci->usb3_rhub.num_ports;
 	ports = xhci->usb3_rhub.ports;
 	while (port_index--) {
-		portsc = readl(ports[port_index]->addr);
+		portsc = xhci_get_portsc(ports[port_index]);
 		if (portsc & (PORT_CHANGE_MASK | PORT_CAS) ||
 		    (portsc & PORT_PLS_MASK) == XDEV_RESUME)
 			return true;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 065478086f76..5d9551887c29 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1959,6 +1959,7 @@ void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
 			      bool clear_ehb);
 void xhci_add_interrupter(struct xhci_hcd *xhci, unsigned int intr_num);
 void xhci_set_portsc(struct xhci_port *port, u32 val);
+u32 xhci_get_portsc(struct xhci_port *port);
 
 /* xHCI roothub code */
 void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
-- 
2.50.1

[PATCH v2 6/8] usb: xhci: add USB Port Register Set struct

[Niklas Neronin]

Introduce a new struct for the Host Controller USB Port Register Set to
enhance readability and maintainability.

The Host Controller Operational Registers (struct 'xhci_op_regs') span from
offset 0x0 to 0x3FF and consist of fixed fields. Following these fixed
fields are the Host Controller USB Port Register Sets, which are dynamic
and repeat from 1 to MaxPorts, as defined by HCSPARAMS1.

Currently, the struct 'xhci_op_regs' includes:
 __le32 port_status_base;		The first PORTSC
 __le32 port_power_base;		The first PORTPMSC
 __le32 port_link_base;			The first PORTLI
 __le32 reserved5;			The first PORTHLPMC, not reserved
 __le32 reserved6[NUM_PORT_REGS*254];	Port registers 2 to MaxPorts

Replace this with the simpler:
 struct xhci_port_regs port_regs[];	Port registers 1 to MaxPorts

Host Controller USB Port Register Set:
| Offset	| Mnemonic	| Register Name
--------------------------------------------------------------------------
| 0x0		| PORTSC	| Port Status and Control
| 0x4		| PORTPMSC	| Port Power Management Status and Control
| 0x8		| PORTLI	| Port Link Info
| 0xC		| PORTHLPMC	| Port Hardware LPM Control

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-mem.c |  3 +--
 drivers/usb/host/xhci.h     | 36 ++++++++++++++++--------------------
 2 files changed, 17 insertions(+), 22 deletions(-)

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index c4a6544aa107..5d5b7ae978c0 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2204,8 +2204,7 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
 		return -ENOMEM;
 
 	for (i = 0; i < num_ports; i++) {
-		xhci->hw_ports[i].addr = &xhci->op_regs->port_status_base +
-			NUM_PORT_REGS * i;
+		xhci->hw_ports[i].addr = &xhci->op_regs->port_regs[i].portsc;
 		xhci->hw_ports[i].hw_portnum = i;
 
 		init_completion(&xhci->hw_ports[i].rexit_done);
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 5d9551887c29..67ea03b20bee 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -66,14 +66,25 @@ struct xhci_cap_regs {
 	/* Reserved up to (CAPLENGTH - 0x1C) */
 };
 
-/* Number of registers per port */
-#define	NUM_PORT_REGS	4
-
 #define PORTSC		0
 #define PORTPMSC	1
 #define PORTLI		2
 #define PORTHLPMC	3
 
+/*
+ * struct xhci_port_regs - Host Controller USB Port Register Set. xHCI spec 5.4.8
+ * @portsc:	Port Status and Control
+ * @portpmsc:	Port Power Management Status and Control
+ * @portli:	Port Link Info
+ * @porthlmpc:	Port Hardware LPM Control
+ */
+struct xhci_port_regs {
+	__le32	portsc;
+	__le32	portpmsc;
+	__le32	portli;
+	__le32	porthlmpc;
+};
+
 /**
  * struct xhci_op_regs - xHCI Host Controller Operational Registers.
  * @command:		USBCMD - xHC command register
@@ -85,16 +96,7 @@ struct xhci_cap_regs {
  * @cmd_ring:		CRP - 64-bit Command Ring Pointer
  * @dcbaa_ptr:		DCBAAP - 64-bit Device Context Base Address Array Pointer
  * @config_reg:		CONFIG - Configure Register
- * @port_status_base:	PORTSCn - base address for Port Status and Control
- * 			Each port has a Port Status and Control register,
- * 			followed by a Port Power Management Status and Control
- * 			register, a Port Link Info register, and a reserved
- * 			register.
- * @port_power_base:	PORTPMSCn - base address for
- * 			Port Power Management Status and Control
- * @port_link_base:	PORTLIn - base address for Port Link Info (current
- * 			Link PM state and control) for USB 2.1 and USB 3.0
- * 			devices.
+ * @port_regs:		Port Register Sets, from 1 to MaxPorts (defined by HCSPARAMS1).
  */
 struct xhci_op_regs {
 	__le32	command;
@@ -110,13 +112,7 @@ struct xhci_op_regs {
 	__le32	config_reg;
 	/* rsvd: offset 0x3C-3FF */
 	__le32	reserved4[241];
-	/* port 1 registers, which serve as a base address for other ports */
-	__le32	port_status_base;
-	__le32	port_power_base;
-	__le32	port_link_base;
-	__le32	reserved5;
-	/* registers for ports 2-255 */
-	__le32	reserved6[NUM_PORT_REGS*254];
+	struct xhci_port_regs port_regs[];
 };
 
 /* USBCMD - USB command - command bitmasks */
-- 
2.50.1

[PATCH v2 7/8] usb: xhci: implement USB Port Register Set struct

[Niklas Neronin]

Refactor the 'xhci_port' struct by changing the 'addr' field from a
'__le32' pointer to a pointer to the 'xhci_port_regs' struct.

Previously, the 'xhci_port' struct contained a '__le32' pointer named addr,
which pointed to the Host Controller USB Port Register Set.
Accessing specific registers required using a macro,
such as port->addr + PORTHLPMC, which was less readable.

Before:
 port->addr
 port->addr + PORTPMSC
 port->addr + PORTLI
 port->addr + PORTHLPMC

After:
 port->addr->portsc
 port->addr->portpmsc
 port->addr->portli
 port->addr->porthlmpc

This change simplifies the code by directly accessing the registers through
the 'xhci_port_regs' struct, making it more intuitive and easier to
follow.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-hub.c | 16 ++++++++--------
 drivers/usb/host/xhci-mem.c |  2 +-
 drivers/usb/host/xhci.c     | 29 ++++++++++++++---------------
 drivers/usb/host/xhci.h     |  7 +------
 4 files changed, 24 insertions(+), 30 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 68fecda9d48d..35d893b7151b 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -683,9 +683,9 @@ static void xhci_port_set_test_mode(struct xhci_hcd *xhci,
 
 	/* xhci only supports test mode for usb2 ports */
 	port = xhci->usb2_rhub.ports[wIndex];
-	temp = readl(port->addr + PORTPMSC);
+	temp = readl(&port->addr->portpmsc);
 	temp |= test_mode << PORT_TEST_MODE_SHIFT;
-	writel(temp, port->addr + PORTPMSC);
+	writel(temp, &port->addr->portpmsc);
 	xhci->test_mode = test_mode;
 	if (test_mode == USB_TEST_FORCE_ENABLE)
 		xhci_start(xhci);
@@ -1288,7 +1288,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				retval = -EINVAL;
 				break;
 			}
-			port_li = readl(port->addr + PORTLI);
+			port_li = readl(&port->addr->portli);
 			status = xhci_get_ext_port_status(temp, port_li);
 			put_unaligned_le32(status, &buf[4]);
 		}
@@ -1520,18 +1520,18 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		case USB_PORT_FEAT_U1_TIMEOUT:
 			if (hcd->speed < HCD_USB3)
 				goto error;
-			temp = readl(port->addr + PORTPMSC);
+			temp = readl(&port->addr->portpmsc);
 			temp &= ~PORT_U1_TIMEOUT_MASK;
 			temp |= PORT_U1_TIMEOUT(timeout);
-			writel(temp, port->addr + PORTPMSC);
+			writel(temp, &port->addr->portpmsc);
 			break;
 		case USB_PORT_FEAT_U2_TIMEOUT:
 			if (hcd->speed < HCD_USB3)
 				goto error;
-			temp = readl(port->addr + PORTPMSC);
+			temp = readl(&port->addr->portpmsc);
 			temp &= ~PORT_U2_TIMEOUT_MASK;
 			temp |= PORT_U2_TIMEOUT(timeout);
-			writel(temp, port->addr + PORTPMSC);
+			writel(temp, &port->addr->portpmsc);
 			break;
 		case USB_PORT_FEAT_TEST:
 			/* 4.19.6 Port Test Modes (USB2 Test Mode) */
@@ -1962,7 +1962,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
 
 	/* poll for U0 link state complete, both USB2 and USB3 */
 	for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) {
-		sret = xhci_handshake(ports[port_index]->addr, PORT_PLC,
+		sret = xhci_handshake(&ports[port_index]->addr->portsc, PORT_PLC,
 				      PORT_PLC, 10 * 1000);
 		if (sret) {
 			xhci_warn(xhci, "port %d-%d resume PLC timeout\n",
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 5d5b7ae978c0..14779ae0515d 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2204,7 +2204,7 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
 		return -ENOMEM;
 
 	for (i = 0; i < num_ports; i++) {
-		xhci->hw_ports[i].addr = &xhci->op_regs->port_regs[i].portsc;
+		xhci->hw_ports[i].addr = &xhci->op_regs->port_regs[i];
 		xhci->hw_ports[i].hw_portnum = i;
 
 		init_completion(&xhci->hw_ports[i].rexit_done);
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index e43501a8ab55..45e3b2d9415b 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -44,12 +44,12 @@ MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default");
 void xhci_set_portsc(struct xhci_port *port, u32 val)
 {
 	trace_xhci_set_portsc(port, val);
-	writel(val, port->addr);
+	writel(val, &port->addr->portsc);
 }
 
 u32 xhci_get_portsc(struct xhci_port *port)
 {
-	return readl(port->addr);
+	return readl(&port->addr->portsc);
 }
 
 static bool td_on_ring(struct xhci_td *td, struct xhci_ring *ring)
@@ -4633,7 +4633,7 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
 {
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	struct xhci_port **ports;
-	__le32 __iomem	*pm_addr, *hlpm_addr;
+	struct xhci_port_regs __iomem *port_regs;
 	u32		pm_val, hlpm_val, field;
 	unsigned int	port_num;
 	unsigned long	flags;
@@ -4658,9 +4658,8 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
 
 	ports = xhci->usb2_rhub.ports;
 	port_num = udev->portnum - 1;
-	pm_addr = ports[port_num]->addr + PORTPMSC;
-	pm_val = readl(pm_addr);
-	hlpm_addr = ports[port_num]->addr + PORTHLPMC;
+	port_regs = ports[port_num]->addr;
+	pm_val = readl(&port_regs->portpmsc);
 
 	xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n",
 		 str_enable_disable(enable), port_num + 1);
@@ -4689,30 +4688,30 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
 			spin_lock_irqsave(&xhci->lock, flags);
 
 			hlpm_val = xhci_calculate_usb2_hw_lpm_params(udev);
-			writel(hlpm_val, hlpm_addr);
+			writel(hlpm_val, &port_regs->porthlmpc);
 			/* flush write */
-			readl(hlpm_addr);
+			readl(&port_regs->porthlmpc);
 		} else {
 			hird = xhci_calculate_hird_besl(xhci, udev);
 		}
 
 		pm_val &= ~PORT_HIRD_MASK;
 		pm_val |= PORT_HIRD(hird) | PORT_RWE | PORT_L1DS(udev->slot_id);
-		writel(pm_val, pm_addr);
-		pm_val = readl(pm_addr);
+		writel(pm_val, &port_regs->portpmsc);
+		pm_val = readl(&port_regs->portpmsc);
 		pm_val |= PORT_HLE;
-		writel(pm_val, pm_addr);
+		writel(pm_val, &port_regs->portpmsc);
 		/* flush write */
-		readl(pm_addr);
+		readl(&port_regs->portpmsc);
 	} else {
 		pm_val &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK | PORT_L1DS_MASK);
-		writel(pm_val, pm_addr);
+		writel(pm_val, &port_regs->portpmsc);
 		/* flush write */
-		readl(pm_addr);
+		readl(&port_regs->portpmsc);
 		if (udev->usb2_hw_lpm_besl_capable) {
 			spin_unlock_irqrestore(&xhci->lock, flags);
 			xhci_change_max_exit_latency(xhci, udev, 0);
-			readl_poll_timeout(ports[port_num]->addr, pm_val,
+			readl_poll_timeout(&ports[port_num]->addr->portsc, pm_val,
 					   (pm_val & PORT_PLS_MASK) == XDEV_U0,
 					   100, 10000);
 			return 0;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 67ea03b20bee..40a90a0713a0 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -66,11 +66,6 @@ struct xhci_cap_regs {
 	/* Reserved up to (CAPLENGTH - 0x1C) */
 };
 
-#define PORTSC		0
-#define PORTPMSC	1
-#define PORTLI		2
-#define PORTHLPMC	3
-
 /*
  * struct xhci_port_regs - Host Controller USB Port Register Set. xHCI spec 5.4.8
  * @portsc:	Port Status and Control
@@ -1469,7 +1464,7 @@ struct xhci_port_cap {
 };
 
 struct xhci_port {
-	__le32 __iomem		*addr;
+	struct xhci_port_regs __iomem	*addr;
 	int			hw_portnum;
 	int			hcd_portnum;
 	struct xhci_hub		*rhub;
-- 
2.50.1

[PATCH v2 8/8] usb: xhci: rename Port Register Set pointer in struct 'xhci_port'

[Niklas Neronin]

Rename the Host Controller USB Port Register Set pointer in the 'xhci_port'
struct from "addr" to "port_reg". This new name accurately reflects the
purpose of the pointer.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
---
 drivers/usb/host/xhci-hub.c | 16 ++++++++--------
 drivers/usb/host/xhci-mem.c |  2 +-
 drivers/usb/host/xhci.c     | 28 ++++++++++++++--------------
 drivers/usb/host/xhci.h     |  2 +-
 4 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 35d893b7151b..aa17c40736f5 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -683,9 +683,9 @@ static void xhci_port_set_test_mode(struct xhci_hcd *xhci,
 
 	/* xhci only supports test mode for usb2 ports */
 	port = xhci->usb2_rhub.ports[wIndex];
-	temp = readl(&port->addr->portpmsc);
+	temp = readl(&port->port_reg->portpmsc);
 	temp |= test_mode << PORT_TEST_MODE_SHIFT;
-	writel(temp, &port->addr->portpmsc);
+	writel(temp, &port->port_reg->portpmsc);
 	xhci->test_mode = test_mode;
 	if (test_mode == USB_TEST_FORCE_ENABLE)
 		xhci_start(xhci);
@@ -1288,7 +1288,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				retval = -EINVAL;
 				break;
 			}
-			port_li = readl(&port->addr->portli);
+			port_li = readl(&port->port_reg->portli);
 			status = xhci_get_ext_port_status(temp, port_li);
 			put_unaligned_le32(status, &buf[4]);
 		}
@@ -1520,18 +1520,18 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 		case USB_PORT_FEAT_U1_TIMEOUT:
 			if (hcd->speed < HCD_USB3)
 				goto error;
-			temp = readl(&port->addr->portpmsc);
+			temp = readl(&port->port_reg->portpmsc);
 			temp &= ~PORT_U1_TIMEOUT_MASK;
 			temp |= PORT_U1_TIMEOUT(timeout);
-			writel(temp, &port->addr->portpmsc);
+			writel(temp, &port->port_reg->portpmsc);
 			break;
 		case USB_PORT_FEAT_U2_TIMEOUT:
 			if (hcd->speed < HCD_USB3)
 				goto error;
-			temp = readl(&port->addr->portpmsc);
+			temp = readl(&port->port_reg->portpmsc);
 			temp &= ~PORT_U2_TIMEOUT_MASK;
 			temp |= PORT_U2_TIMEOUT(timeout);
-			writel(temp, &port->addr->portpmsc);
+			writel(temp, &port->port_reg->portpmsc);
 			break;
 		case USB_PORT_FEAT_TEST:
 			/* 4.19.6 Port Test Modes (USB2 Test Mode) */
@@ -1962,7 +1962,7 @@ int xhci_bus_resume(struct usb_hcd *hcd)
 
 	/* poll for U0 link state complete, both USB2 and USB3 */
 	for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) {
-		sret = xhci_handshake(&ports[port_index]->addr->portsc, PORT_PLC,
+		sret = xhci_handshake(&ports[port_index]->port_reg->portsc, PORT_PLC,
 				      PORT_PLC, 10 * 1000);
 		if (sret) {
 			xhci_warn(xhci, "port %d-%d resume PLC timeout\n",
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 14779ae0515d..3e871e207585 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2204,7 +2204,7 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
 		return -ENOMEM;
 
 	for (i = 0; i < num_ports; i++) {
-		xhci->hw_ports[i].addr = &xhci->op_regs->port_regs[i];
+		xhci->hw_ports[i].port_reg = &xhci->op_regs->port_regs[i];
 		xhci->hw_ports[i].hw_portnum = i;
 
 		init_completion(&xhci->hw_ports[i].rexit_done);
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 45e3b2d9415b..210b554deea2 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -44,12 +44,12 @@ MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default");
 void xhci_set_portsc(struct xhci_port *port, u32 val)
 {
 	trace_xhci_set_portsc(port, val);
-	writel(val, &port->addr->portsc);
+	writel(val, &port->port_reg->portsc);
 }
 
 u32 xhci_get_portsc(struct xhci_port *port)
 {
-	return readl(&port->addr->portsc);
+	return readl(&port->port_reg->portsc);
 }
 
 static bool td_on_ring(struct xhci_td *td, struct xhci_ring *ring)
@@ -4633,7 +4633,7 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
 {
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	struct xhci_port **ports;
-	struct xhci_port_regs __iomem *port_regs;
+	struct xhci_port_regs __iomem *port_reg;
 	u32		pm_val, hlpm_val, field;
 	unsigned int	port_num;
 	unsigned long	flags;
@@ -4658,8 +4658,8 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
 
 	ports = xhci->usb2_rhub.ports;
 	port_num = udev->portnum - 1;
-	port_regs = ports[port_num]->addr;
-	pm_val = readl(&port_regs->portpmsc);
+	port_reg = ports[port_num]->port_reg;
+	pm_val = readl(&port_reg->portpmsc);
 
 	xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n",
 		 str_enable_disable(enable), port_num + 1);
@@ -4688,30 +4688,30 @@ static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
 			spin_lock_irqsave(&xhci->lock, flags);
 
 			hlpm_val = xhci_calculate_usb2_hw_lpm_params(udev);
-			writel(hlpm_val, &port_regs->porthlmpc);
+			writel(hlpm_val, &port_reg->porthlmpc);
 			/* flush write */
-			readl(&port_regs->porthlmpc);
+			readl(&port_reg->porthlmpc);
 		} else {
 			hird = xhci_calculate_hird_besl(xhci, udev);
 		}
 
 		pm_val &= ~PORT_HIRD_MASK;
 		pm_val |= PORT_HIRD(hird) | PORT_RWE | PORT_L1DS(udev->slot_id);
-		writel(pm_val, &port_regs->portpmsc);
-		pm_val = readl(&port_regs->portpmsc);
+		writel(pm_val, &port_reg->portpmsc);
+		pm_val = readl(&port_reg->portpmsc);
 		pm_val |= PORT_HLE;
-		writel(pm_val, &port_regs->portpmsc);
+		writel(pm_val, &port_reg->portpmsc);
 		/* flush write */
-		readl(&port_regs->portpmsc);
+		readl(&port_reg->portpmsc);
 	} else {
 		pm_val &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK | PORT_L1DS_MASK);
-		writel(pm_val, &port_regs->portpmsc);
+		writel(pm_val, &port_reg->portpmsc);
 		/* flush write */
-		readl(&port_regs->portpmsc);
+		readl(&port_reg->portpmsc);
 		if (udev->usb2_hw_lpm_besl_capable) {
 			spin_unlock_irqrestore(&xhci->lock, flags);
 			xhci_change_max_exit_latency(xhci, udev, 0);
-			readl_poll_timeout(&ports[port_num]->addr->portsc, pm_val,
+			readl_poll_timeout(&ports[port_num]->port_reg->portsc, pm_val,
 					   (pm_val & PORT_PLS_MASK) == XDEV_U0,
 					   100, 10000);
 			return 0;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 40a90a0713a0..86edc4297929 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1464,7 +1464,7 @@ struct xhci_port_cap {
 };
 
 struct xhci_port {
-	struct xhci_port_regs __iomem	*addr;
+	struct xhci_port_regs __iomem	*port_reg;
 	int			hw_portnum;
 	int			hcd_portnum;
 	struct xhci_hub		*rhub;
-- 
2.50.1

Re: [PATCH v2 2/8] usb: xhci: align PORTSC trace with one-based port numbering

[Mathias Nyman]

On 17.9.2025 15.58, Niklas Neronin wrote:
> In the xHCI driver, port numbers are typically described using a one-based
> index. However, tracing currently uses a zero-based index. To ensure
> consistency between tracing and dynamic debugging, update the trace port
> number to use a one-based index.
> 

This makes comparing traces and dynamic debug logs much easier.

I picked patches 1/8 and 2/8 already now and sent them forward for usb-next

Thanks
Mathias

Re: [PATCH v2 4/8] usb: xhci: add tracing for PORTSC register writes

[kernel test robot]

Hi Niklas,

kernel test robot noticed the following build errors:

[auto build test ERROR on usb/usb-linus]
[also build test ERROR on tegra/for-next westeri-thunderbolt/next linus/master v6.17-rc6]
[cannot apply to usb/usb-testing usb/usb-next next-20250918]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Niklas-Neronin/usb-xhci-correct-indentation-for-PORTSC-tracing-function/20250917-211828
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-linus
patch link:    https://lore.kernel.org/r/20250917125850.3380560-5-niklas.neronin%40linux.intel.com
patch subject: [PATCH v2 4/8] usb: xhci: add tracing for PORTSC register writes
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20250919/202509191919.KyzDDNgQ-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250919/202509191919.KyzDDNgQ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509191919.KyzDDNgQ-lkp@intel.com/

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "xhci_set_portsc" [drivers/usb/host/xhci-pci.ko] undefined!

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2 5/8] usb: xhci: add PORTSC read function

[kernel test robot]

Hi Niklas,

kernel test robot noticed the following build errors:

[auto build test ERROR on usb/usb-linus]
[also build test ERROR on tegra/for-next westeri-thunderbolt/next linus/master v6.17-rc6]
[cannot apply to usb/usb-testing usb/usb-next next-20250919]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Niklas-Neronin/usb-xhci-correct-indentation-for-PORTSC-tracing-function/20250917-211828
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-linus
patch link:    https://lore.kernel.org/r/20250917125850.3380560-6-niklas.neronin%40linux.intel.com
patch subject: [PATCH v2 5/8] usb: xhci: add PORTSC read function
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20250921/202509210017.WFJqvNsz-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250921/202509210017.WFJqvNsz-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509210017.WFJqvNsz-lkp@intel.com/

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "xhci_get_portsc" [drivers/usb/host/xhci-pci.ko] undefined!
ERROR: modpost: "xhci_set_portsc" [drivers/usb/host/xhci-pci.ko] undefined!

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki