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Message-Id: <20260114100748.2950103-4-prashanth.k@oss.qualcomm.com>
Date: Wed, 14 Jan 2026 15:37:48 +0530
From: Prashanth K <prashanth.k@....qualcomm.com>
To: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
Prashanth K <prashanth.k@....qualcomm.com>
Subject: [PATCH v4 3/3] usb: dwc3: Log dwc3 address in traces
When multiple DWC3 controllers are being used, trace events from
different instances get mixed up making debugging difficult as
there's no way to distinguish which instance generated the trace.
Use the register base address of dwc3 controller and append it to
trace events, so that the source instance is clearly identifiable.
Example trace output,
before -> dwc3_event: event (00000101): Reset [U0]
after -> dwc3_event: 0a600000: event (00000101): Reset [U0]
Signed-off-by: Prashanth K <prashanth.k@....qualcomm.com>
---
drivers/usb/dwc3/core.c | 5 ++-
drivers/usb/dwc3/core.h | 2 +
drivers/usb/dwc3/ep0.c | 2 +-
drivers/usb/dwc3/gadget.c | 2 +-
drivers/usb/dwc3/io.h | 4 +-
drivers/usb/dwc3/trace.h | 88 ++++++++++++++++++++++++---------------
6 files changed, 65 insertions(+), 38 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 670a9d4bfff2..125616489e04 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -158,7 +158,7 @@ void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode, bool ignore_susphy)
dwc3_writel(dwc, DWC3_GCTL, reg);
dwc->current_dr_role = mode;
- trace_dwc3_set_prtcap(mode);
+ trace_dwc3_set_prtcap(dwc, mode);
}
EXPORT_SYMBOL_GPL(dwc3_set_prtcap);
@@ -2193,6 +2193,9 @@ int dwc3_core_probe(const struct dwc3_probe_data *data)
dwc_res = *res;
dwc_res.start += DWC3_GLOBALS_REGS_START;
+ /* Store the base register address for using it in traces later */
+ dwc->address = (u32)res->start;
+
if (dev->of_node) {
struct device_node *parent = of_get_parent(dev->of_node);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 23188b910528..bc5ad3206d58 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -1043,6 +1043,7 @@ struct dwc3_glue_ops {
* @gadget_max_speed: maximum gadget speed requested
* @gadget_ssp_rate: Gadget driver's maximum supported SuperSpeed Plus signaling
* rate and lane count.
+ * @address: Cached lower 32-bit base address to be used for logging.
* @ip: controller's ID
* @revision: controller's version of an IP
* @version_type: VERSIONTYPE register contents, a sub release of a revision
@@ -1258,6 +1259,7 @@ struct dwc3 {
enum usb_ssp_rate max_ssp_rate;
enum usb_ssp_rate gadget_ssp_rate;
+ u32 address;
u32 ip;
#define DWC3_IP 0x5533
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index a8ff8db610d3..bfe616194dfa 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -833,7 +833,7 @@ static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
if (!dwc->gadget_driver || !dwc->softconnect || !dwc->connected)
goto out;
- trace_dwc3_ctrl_req(ctrl);
+ trace_dwc3_ctrl_req(dwc, ctrl);
len = le16_to_cpu(ctrl->wLength);
if (!len) {
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 9355c952c140..384963151ece 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -278,7 +278,7 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned int cmd,
status = -ETIMEDOUT;
}
- trace_dwc3_gadget_generic_cmd(cmd, param, status);
+ trace_dwc3_gadget_generic_cmd(dwc, cmd, param, status);
return ret;
}
diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h
index 7dd0c1e0cf74..cad9a2ae1547 100644
--- a/drivers/usb/dwc3/io.h
+++ b/drivers/usb/dwc3/io.h
@@ -33,7 +33,7 @@ static inline u32 dwc3_readl(struct dwc3 *dwc, u32 offset)
* documentation, so we revert it back to the proper addresses, the
* same way they are described on SNPS documentation
*/
- trace_dwc3_readl(base - DWC3_GLOBALS_REGS_START, offset, value);
+ trace_dwc3_readl(dwc, base - DWC3_GLOBALS_REGS_START, offset, value);
return value;
}
@@ -54,7 +54,7 @@ static inline void dwc3_writel(struct dwc3 *dwc, u32 offset, u32 value)
* documentation, so we revert it back to the proper addresses, the
* same way they are described on SNPS documentation
*/
- trace_dwc3_writel(base - DWC3_GLOBALS_REGS_START, offset, value);
+ trace_dwc3_writel(dwc, base - DWC3_GLOBALS_REGS_START, offset, value);
}
#endif /* __DRIVERS_USB_DWC3_IO_H */
diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h
index b6ba984bafcd..6c2c4990917a 100644
--- a/drivers/usb/dwc3/trace.h
+++ b/drivers/usb/dwc3/trace.h
@@ -20,63 +20,70 @@
#include "debug.h"
DECLARE_EVENT_CLASS(dwc3_log_set_prtcap,
- TP_PROTO(u32 mode),
- TP_ARGS(mode),
+ TP_PROTO(struct dwc3 *dwc, u32 mode),
+ TP_ARGS(dwc, mode),
TP_STRUCT__entry(
+ __field(u32, address)
__field(u32, mode)
),
TP_fast_assign(
+ __entry->address = dwc->address;
__entry->mode = mode;
),
- TP_printk("mode %s", dwc3_mode_string(__entry->mode))
+ TP_printk("%08x: mode %s", __entry->address, dwc3_mode_string(__entry->mode))
);
DEFINE_EVENT(dwc3_log_set_prtcap, dwc3_set_prtcap,
- TP_PROTO(u32 mode),
- TP_ARGS(mode)
+ TP_PROTO(struct dwc3 *dwc, u32 mode),
+ TP_ARGS(dwc, mode)
);
DECLARE_EVENT_CLASS(dwc3_log_io,
- TP_PROTO(void *base, u32 offset, u32 value),
- TP_ARGS(base, offset, value),
+ TP_PROTO(struct dwc3 *dwc, void *base, u32 offset, u32 value),
+ TP_ARGS(dwc, base, offset, value),
TP_STRUCT__entry(
+ __field(u32, address)
__field(void *, base)
__field(u32, offset)
__field(u32, value)
),
TP_fast_assign(
+ __entry->address = dwc->address;
__entry->base = base;
__entry->offset = offset;
__entry->value = value;
),
- TP_printk("addr %p offset %04x value %08x",
+ TP_printk("%08x: addr %p offset %04x value %08x",
+ __entry->address,
__entry->base + __entry->offset,
__entry->offset,
__entry->value)
);
DEFINE_EVENT(dwc3_log_io, dwc3_readl,
- TP_PROTO(void __iomem *base, u32 offset, u32 value),
- TP_ARGS(base, offset, value)
+ TP_PROTO(struct dwc3 *dwc, void __iomem *base, u32 offset, u32 value),
+ TP_ARGS(dwc, base, offset, value)
);
DEFINE_EVENT(dwc3_log_io, dwc3_writel,
- TP_PROTO(void __iomem *base, u32 offset, u32 value),
- TP_ARGS(base, offset, value)
+ TP_PROTO(struct dwc3 *dwc, void __iomem *base, u32 offset, u32 value),
+ TP_ARGS(dwc, base, offset, value)
);
DECLARE_EVENT_CLASS(dwc3_log_event,
TP_PROTO(u32 event, struct dwc3 *dwc),
TP_ARGS(event, dwc),
TP_STRUCT__entry(
+ __field(u32, address)
__field(u32, event)
__field(u32, ep0state)
),
TP_fast_assign(
+ __entry->address = dwc->address;
__entry->event = event;
__entry->ep0state = dwc->ep0state;
),
- TP_printk("event (%08x): %s", __entry->event,
+ TP_printk("%08x: event (%08x): %s", __entry->address, __entry->event,
dwc3_decode_event(__get_buf(DWC3_MSG_MAX), DWC3_MSG_MAX,
__entry->event, __entry->ep0state))
);
@@ -87,9 +94,10 @@ DEFINE_EVENT(dwc3_log_event, dwc3_event,
);
DECLARE_EVENT_CLASS(dwc3_log_ctrl,
- TP_PROTO(struct usb_ctrlrequest *ctrl),
- TP_ARGS(ctrl),
+ TP_PROTO(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl),
+ TP_ARGS(dwc, ctrl),
TP_STRUCT__entry(
+ __field(u32, address)
__field(__u8, bRequestType)
__field(__u8, bRequest)
__field(__u16, wValue)
@@ -97,13 +105,15 @@ DECLARE_EVENT_CLASS(dwc3_log_ctrl,
__field(__u16, wLength)
),
TP_fast_assign(
+ __entry->address = dwc->address;
__entry->bRequestType = ctrl->bRequestType;
__entry->bRequest = ctrl->bRequest;
__entry->wValue = le16_to_cpu(ctrl->wValue);
__entry->wIndex = le16_to_cpu(ctrl->wIndex);
__entry->wLength = le16_to_cpu(ctrl->wLength);
),
- TP_printk("%s", usb_decode_ctrl(__get_buf(DWC3_MSG_MAX), DWC3_MSG_MAX,
+ TP_printk("%08x: %s", __entry->address, usb_decode_ctrl(__get_buf(DWC3_MSG_MAX),
+ DWC3_MSG_MAX,
__entry->bRequestType,
__entry->bRequest, __entry->wValue,
__entry->wIndex, __entry->wLength)
@@ -111,14 +121,15 @@ DECLARE_EVENT_CLASS(dwc3_log_ctrl,
);
DEFINE_EVENT(dwc3_log_ctrl, dwc3_ctrl_req,
- TP_PROTO(struct usb_ctrlrequest *ctrl),
- TP_ARGS(ctrl)
+ TP_PROTO(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl),
+ TP_ARGS(dwc, ctrl)
);
DECLARE_EVENT_CLASS(dwc3_log_request,
TP_PROTO(struct dwc3_request *req),
TP_ARGS(req),
TP_STRUCT__entry(
+ __field(u32, address)
__string(name, req->dep->name)
__field(struct dwc3_request *, req)
__field(unsigned int, actual)
@@ -129,7 +140,7 @@ DECLARE_EVENT_CLASS(dwc3_log_request,
__field(int, no_interrupt)
),
TP_fast_assign(
- __assign_str(name);
+ __entry->address = req->dep->dwc->address;
__entry->req = req;
__entry->actual = req->request.actual;
__entry->length = req->request.length;
@@ -138,8 +149,10 @@ DECLARE_EVENT_CLASS(dwc3_log_request,
__entry->short_not_ok = req->request.short_not_ok;
__entry->no_interrupt = req->request.no_interrupt;
),
- TP_printk("%s: req %p length %u/%u %s%s%s ==> %d",
- __get_str(name), __entry->req, __entry->actual, __entry->length,
+ TP_printk("%08x: %s: req %p length %u/%u %s%s%s ==> %d",
+ __entry->address,
+ __get_str(name), __entry->req,
+ __entry->actual, __entry->length,
__entry->zero ? "Z" : "z",
__entry->short_not_ok ? "S" : "s",
__entry->no_interrupt ? "i" : "I",
@@ -173,28 +186,30 @@ DEFINE_EVENT(dwc3_log_request, dwc3_gadget_giveback,
);
DECLARE_EVENT_CLASS(dwc3_log_generic_cmd,
- TP_PROTO(unsigned int cmd, u32 param, int status),
- TP_ARGS(cmd, param, status),
+ TP_PROTO(struct dwc3 *dwc, unsigned int cmd, u32 param, int status),
+ TP_ARGS(dwc, cmd, param, status),
TP_STRUCT__entry(
+ __field(u32, address)
__field(unsigned int, cmd)
__field(u32, param)
__field(int, status)
),
TP_fast_assign(
+ __entry->address = dwc->address;
__entry->cmd = cmd;
__entry->param = param;
__entry->status = status;
),
- TP_printk("cmd '%s' [%x] param %08x --> status: %s",
- dwc3_gadget_generic_cmd_string(__entry->cmd),
+ TP_printk("%08x: cmd '%s' [%x] param %08x --> status: %s",
+ __entry->address, dwc3_gadget_generic_cmd_string(__entry->cmd),
__entry->cmd, __entry->param,
dwc3_gadget_generic_cmd_status_string(__entry->status)
)
);
DEFINE_EVENT(dwc3_log_generic_cmd, dwc3_gadget_generic_cmd,
- TP_PROTO(unsigned int cmd, u32 param, int status),
- TP_ARGS(cmd, param, status)
+ TP_PROTO(struct dwc3 *dwc, unsigned int cmd, u32 param, int status),
+ TP_ARGS(dwc, cmd, param, status)
);
DECLARE_EVENT_CLASS(dwc3_log_gadget_ep_cmd,
@@ -202,6 +217,7 @@ DECLARE_EVENT_CLASS(dwc3_log_gadget_ep_cmd,
struct dwc3_gadget_ep_cmd_params *params, int cmd_status),
TP_ARGS(dep, cmd, params, cmd_status),
TP_STRUCT__entry(
+ __field(u32, address)
__string(name, dep->name)
__field(unsigned int, cmd)
__field(u32, param0)
@@ -210,6 +226,7 @@ DECLARE_EVENT_CLASS(dwc3_log_gadget_ep_cmd,
__field(int, cmd_status)
),
TP_fast_assign(
+ __entry->address = dep->dwc->address;
__assign_str(name);
__entry->cmd = cmd;
__entry->param0 = params->param0;
@@ -217,8 +234,9 @@ DECLARE_EVENT_CLASS(dwc3_log_gadget_ep_cmd,
__entry->param2 = params->param2;
__entry->cmd_status = cmd_status;
),
- TP_printk("%s: cmd '%s' [%x] params %08x %08x %08x --> status: %s",
- __get_str(name), dwc3_gadget_ep_cmd_string(__entry->cmd),
+ TP_printk("%08x: %s: cmd '%s' [%x] params %08x %08x %08x --> status: %s",
+ __entry->address, __get_str(name),
+ dwc3_gadget_ep_cmd_string(__entry->cmd),
__entry->cmd, __entry->param0,
__entry->param1, __entry->param2,
dwc3_ep_cmd_status_string(__entry->cmd_status)
@@ -235,6 +253,7 @@ DECLARE_EVENT_CLASS(dwc3_log_trb,
TP_PROTO(struct dwc3_ep *dep, struct dwc3_trb *trb),
TP_ARGS(dep, trb),
TP_STRUCT__entry(
+ __field(u32, address)
__string(name, dep->name)
__field(struct dwc3_trb *, trb)
__field(u32, bpl)
@@ -246,6 +265,7 @@ DECLARE_EVENT_CLASS(dwc3_log_trb,
__field(u32, dequeue)
),
TP_fast_assign(
+ __entry->address = dep->dwc->address;
__assign_str(name);
__entry->trb = trb;
__entry->bpl = trb->bpl;
@@ -256,8 +276,8 @@ DECLARE_EVENT_CLASS(dwc3_log_trb,
__entry->enqueue = dep->trb_enqueue;
__entry->dequeue = dep->trb_dequeue;
),
- TP_printk("%s: trb %p (E%d:D%d) buf %08x%08x size %s%d ctrl %08x sofn %08x (%c%c%c%c:%c%c:%s)",
- __get_str(name), __entry->trb, __entry->enqueue,
+ TP_printk("%08x: %s: trb %p (E%d:D%d) buf %08x%08x size %s%d ctrl %08x sofn %08x (%c%c%c%c:%c%c:%s)",
+ __entry->address, __get_str(name), __entry->trb, __entry->enqueue,
__entry->dequeue, __entry->bph, __entry->bpl,
({char *s;
int pcm = ((__entry->size >> 24) & 3) + 1;
@@ -307,6 +327,7 @@ DECLARE_EVENT_CLASS(dwc3_log_ep,
TP_PROTO(struct dwc3_ep *dep),
TP_ARGS(dep),
TP_STRUCT__entry(
+ __field(u32, address)
__string(name, dep->name)
__field(unsigned int, maxpacket)
__field(unsigned int, maxpacket_limit)
@@ -318,6 +339,7 @@ DECLARE_EVENT_CLASS(dwc3_log_ep,
__field(u8, trb_dequeue)
),
TP_fast_assign(
+ __entry->address = dep->dwc->address;
__assign_str(name);
__entry->maxpacket = dep->endpoint.maxpacket;
__entry->maxpacket_limit = dep->endpoint.maxpacket_limit;
@@ -328,8 +350,8 @@ DECLARE_EVENT_CLASS(dwc3_log_ep,
__entry->trb_enqueue = dep->trb_enqueue;
__entry->trb_dequeue = dep->trb_dequeue;
),
- TP_printk("%s: mps %d/%d streams %d burst %d ring %d/%d flags %c:%c%c%c%c:%c",
- __get_str(name), __entry->maxpacket,
+ TP_printk("%08x: %s: mps %d/%d streams %d burst %d ring %d/%d flags %c:%c%c%c%c:%c",
+ __entry->address, __get_str(name), __entry->maxpacket,
__entry->maxpacket_limit, __entry->max_streams,
__entry->maxburst, __entry->trb_enqueue,
__entry->trb_dequeue,
--
2.34.1
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