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318324e6df
The devctl register on musb is the only way to get state information on musb. The hardware can easily get confused because it tries to do things on it's own automagically, and things like slow VBUS rise can make things fail. Let's make it easier to debug the ongoing state change issues that keep popping up on regular basis and add tracing support. With these changes we can easily trace musb state change events with: echo 1 > /sys/kernel/debug/tracing/events/musb/musb_state/enable cat /sys/kernel/debug/tracing/trace_pipe echo 0 > /sys/kernel/debug/tracing/events/musb/musb_state/enable Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Andreas Kemnade <andreas@kemnade.info> Cc: Bhushan Shah <bshah@kde.org> Cc: Drew Fustini <drew@beagleboard.org> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20210604080536.12185-2-tony@atomide.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
390 lines
9.4 KiB
C
390 lines
9.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* musb_trace.h - MUSB Controller Trace Support
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*
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
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*
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* Author: Bin Liu <b-liu@ti.com>
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM musb
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#if !defined(__MUSB_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define __MUSB_TRACE_H
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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#include <linux/usb.h>
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#include "musb_core.h"
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#ifdef CONFIG_USB_TI_CPPI41_DMA
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#include "cppi_dma.h"
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#endif
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#define MUSB_MSG_MAX 500
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TRACE_EVENT(musb_log,
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TP_PROTO(struct musb *musb, struct va_format *vaf),
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TP_ARGS(musb, vaf),
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TP_STRUCT__entry(
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__string(name, dev_name(musb->controller))
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__dynamic_array(char, msg, MUSB_MSG_MAX)
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),
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TP_fast_assign(
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__assign_str(name, dev_name(musb->controller));
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vsnprintf(__get_str(msg), MUSB_MSG_MAX, vaf->fmt, *vaf->va);
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),
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TP_printk("%s: %s", __get_str(name), __get_str(msg))
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);
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TRACE_EVENT(musb_state,
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TP_PROTO(struct musb *musb, u8 devctl, const char *desc),
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TP_ARGS(musb, devctl, desc),
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TP_STRUCT__entry(
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__string(name, dev_name(musb->controller))
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__field(u8, devctl)
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__string(desc, desc)
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),
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TP_fast_assign(
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__assign_str(name, dev_name(musb->controller));
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__entry->devctl = devctl;
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__assign_str(desc, desc);
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),
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TP_printk("%s: devctl: %02x %s", __get_str(name), __entry->devctl,
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__get_str(desc))
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);
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DECLARE_EVENT_CLASS(musb_regb,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u8 data),
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TP_ARGS(caller, addr, offset, data),
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TP_STRUCT__entry(
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__field(void *, caller)
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__field(const void __iomem *, addr)
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__field(unsigned int, offset)
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__field(u8, data)
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),
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TP_fast_assign(
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__entry->caller = caller;
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__entry->addr = addr;
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__entry->offset = offset;
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__entry->data = data;
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),
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TP_printk("%pS: %p + %04x: %02x",
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__entry->caller, __entry->addr, __entry->offset, __entry->data)
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);
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DEFINE_EVENT(musb_regb, musb_readb,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u8 data),
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TP_ARGS(caller, addr, offset, data)
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);
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DEFINE_EVENT(musb_regb, musb_writeb,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u8 data),
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TP_ARGS(caller, addr, offset, data)
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);
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DECLARE_EVENT_CLASS(musb_regw,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u16 data),
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TP_ARGS(caller, addr, offset, data),
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TP_STRUCT__entry(
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__field(void *, caller)
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__field(const void __iomem *, addr)
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__field(unsigned int, offset)
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__field(u16, data)
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),
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TP_fast_assign(
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__entry->caller = caller;
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__entry->addr = addr;
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__entry->offset = offset;
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__entry->data = data;
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),
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TP_printk("%pS: %p + %04x: %04x",
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__entry->caller, __entry->addr, __entry->offset, __entry->data)
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);
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DEFINE_EVENT(musb_regw, musb_readw,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u16 data),
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TP_ARGS(caller, addr, offset, data)
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);
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DEFINE_EVENT(musb_regw, musb_writew,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u16 data),
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TP_ARGS(caller, addr, offset, data)
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);
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DECLARE_EVENT_CLASS(musb_regl,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u32 data),
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TP_ARGS(caller, addr, offset, data),
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TP_STRUCT__entry(
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__field(void *, caller)
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__field(const void __iomem *, addr)
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__field(unsigned int, offset)
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__field(u32, data)
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),
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TP_fast_assign(
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__entry->caller = caller;
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__entry->addr = addr;
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__entry->offset = offset;
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__entry->data = data;
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),
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TP_printk("%pS: %p + %04x: %08x",
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__entry->caller, __entry->addr, __entry->offset, __entry->data)
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);
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DEFINE_EVENT(musb_regl, musb_readl,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u32 data),
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TP_ARGS(caller, addr, offset, data)
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);
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DEFINE_EVENT(musb_regl, musb_writel,
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TP_PROTO(void *caller, const void __iomem *addr,
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unsigned int offset, u32 data),
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TP_ARGS(caller, addr, offset, data)
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);
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TRACE_EVENT(musb_isr,
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TP_PROTO(struct musb *musb),
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TP_ARGS(musb),
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TP_STRUCT__entry(
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__string(name, dev_name(musb->controller))
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__field(u8, int_usb)
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__field(u16, int_tx)
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__field(u16, int_rx)
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),
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TP_fast_assign(
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__assign_str(name, dev_name(musb->controller));
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__entry->int_usb = musb->int_usb;
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__entry->int_tx = musb->int_tx;
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__entry->int_rx = musb->int_rx;
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),
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TP_printk("%s: usb %02x, tx %04x, rx %04x",
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__get_str(name), __entry->int_usb,
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__entry->int_tx, __entry->int_rx
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)
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);
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DECLARE_EVENT_CLASS(musb_urb,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb),
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TP_STRUCT__entry(
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__string(name, dev_name(musb->controller))
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__field(struct urb *, urb)
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__field(unsigned int, pipe)
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__field(int, status)
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__field(unsigned int, flag)
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__field(u32, buf_len)
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__field(u32, actual_len)
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),
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TP_fast_assign(
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__assign_str(name, dev_name(musb->controller));
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__entry->urb = urb;
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__entry->pipe = urb->pipe;
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__entry->status = urb->status;
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__entry->flag = urb->transfer_flags;
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__entry->buf_len = urb->transfer_buffer_length;
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__entry->actual_len = urb->actual_length;
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),
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TP_printk("%s: %p, dev%d ep%d%s, flag 0x%x, len %d/%d, status %d",
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__get_str(name), __entry->urb,
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usb_pipedevice(__entry->pipe),
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usb_pipeendpoint(__entry->pipe),
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usb_pipein(__entry->pipe) ? "in" : "out",
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__entry->flag,
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__entry->actual_len, __entry->buf_len,
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__entry->status
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)
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);
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DEFINE_EVENT(musb_urb, musb_urb_start,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb)
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);
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DEFINE_EVENT(musb_urb, musb_urb_gb,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb)
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);
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DEFINE_EVENT(musb_urb, musb_urb_rx,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb)
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);
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DEFINE_EVENT(musb_urb, musb_urb_tx,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb)
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);
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DEFINE_EVENT(musb_urb, musb_urb_enq,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb)
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);
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DEFINE_EVENT(musb_urb, musb_urb_deq,
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TP_PROTO(struct musb *musb, struct urb *urb),
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TP_ARGS(musb, urb)
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);
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DECLARE_EVENT_CLASS(musb_req,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req),
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TP_STRUCT__entry(
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__field(struct usb_request *, req)
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__field(u8, is_tx)
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__field(u8, epnum)
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__field(int, status)
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__field(unsigned int, buf_len)
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__field(unsigned int, actual_len)
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__field(unsigned int, zero)
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__field(unsigned int, short_not_ok)
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__field(unsigned int, no_interrupt)
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),
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TP_fast_assign(
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__entry->req = &req->request;
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__entry->is_tx = req->tx;
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__entry->epnum = req->epnum;
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__entry->status = req->request.status;
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__entry->buf_len = req->request.length;
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__entry->actual_len = req->request.actual;
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__entry->zero = req->request.zero;
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__entry->short_not_ok = req->request.short_not_ok;
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__entry->no_interrupt = req->request.no_interrupt;
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),
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TP_printk("%p, ep%d %s, %s%s%s, len %d/%d, status %d",
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__entry->req, __entry->epnum,
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__entry->is_tx ? "tx/IN" : "rx/OUT",
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__entry->zero ? "Z" : "z",
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__entry->short_not_ok ? "S" : "s",
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__entry->no_interrupt ? "I" : "i",
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__entry->actual_len, __entry->buf_len,
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__entry->status
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)
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);
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DEFINE_EVENT(musb_req, musb_req_gb,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_tx,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_rx,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_alloc,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_free,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_start,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_enq,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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DEFINE_EVENT(musb_req, musb_req_deq,
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TP_PROTO(struct musb_request *req),
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TP_ARGS(req)
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);
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#ifdef CONFIG_USB_TI_CPPI41_DMA
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DECLARE_EVENT_CLASS(musb_cppi41,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch),
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TP_STRUCT__entry(
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__field(struct cppi41_dma_channel *, ch)
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__string(name, dev_name(ch->hw_ep->musb->controller))
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__field(u8, hwep)
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__field(u8, port)
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__field(u8, is_tx)
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__field(u32, len)
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__field(u32, prog_len)
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__field(u32, xferred)
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),
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TP_fast_assign(
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__entry->ch = ch;
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__assign_str(name, dev_name(ch->hw_ep->musb->controller));
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__entry->hwep = ch->hw_ep->epnum;
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__entry->port = ch->port_num;
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__entry->is_tx = ch->is_tx;
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__entry->len = ch->total_len;
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__entry->prog_len = ch->prog_len;
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__entry->xferred = ch->transferred;
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),
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TP_printk("%s: %p, hwep%d ch%d%s, prog_len %d, len %d/%d",
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__get_str(name), __entry->ch, __entry->hwep,
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__entry->port, __entry->is_tx ? "tx" : "rx",
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__entry->prog_len, __entry->xferred, __entry->len
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)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_done,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_gb,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_config,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_cont,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_alloc,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_abort,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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DEFINE_EVENT(musb_cppi41, musb_cppi41_free,
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TP_PROTO(struct cppi41_dma_channel *ch),
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TP_ARGS(ch)
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);
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#endif /* CONFIG_USB_TI_CPPI41_DMA */
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#endif /* __MUSB_TRACE_H */
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/* this part has to be here */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE musb_trace
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#include <trace/define_trace.h>
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