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usb: mtu3: add tracepoints to help debug

Browse Source 
This patch implements a few initial tracepoints for the
mtu3 driver. More traces can be added as necessary in order
to ease the task of debugging.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2019-03-21 10:53:48 +08:00 committed by Greg Kroah-Hartman
parent 4aab6ad24a
commit 83374e035b
9 changed files with 347 additions and 1 deletions
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7
drivers/usb/mtu3/Makefile
View File

@ -2,10 +2,17 @@
ccflags-$(CONFIG_USB_MTU3_DEBUG) += -DDEBUG
# define_trace.h needs to know how to find our header
CFLAGS_mtu3_trace.o := -I$(src)
obj-$(CONFIG_USB_MTU3) += mtu3.o
mtu3-y := mtu3_plat.o
ifneq ($(CONFIG_TRACING),)
mtu3-y += mtu3_trace.o
endif
ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
mtu3-y += mtu3_host.o
endif

5
drivers/usb/mtu3/mtu3_core.c
View File

@ -17,6 +17,7 @@
#include "mtu3.h"
#include "mtu3_debug.h"
#include "mtu3_trace.h"
static int ep_fifo_alloc(struct mtu3_ep *mep, u32 seg_size)
{
@ -656,6 +657,8 @@ static irqreturn_t mtu3_link_isr(struct mtu3 *mtu)
break;
}
dev_dbg(mtu->dev, "%s: %s\n", __func__, usb_speed_string(udev_speed));
mtu3_dbg_trace(mtu->dev, "link speed %s",
usb_speed_string(udev_speed));
mtu->g.speed = udev_speed;
mtu->g.ep0->maxpacket = maxpkt;
@ -678,6 +681,7 @@ static irqreturn_t mtu3_u3_ltssm_isr(struct mtu3 *mtu)
ltssm &= mtu3_readl(mbase, U3D_LTSSM_INTR_ENABLE);
mtu3_writel(mbase, U3D_LTSSM_INTR, ltssm); /* W1C */
dev_dbg(mtu->dev, "=== LTSSM[%x] ===\n", ltssm);
trace_mtu3_u3_ltssm_isr(ltssm);
if (ltssm & (HOT_RST_INTR | WARM_RST_INTR))
mtu3_gadget_reset(mtu);
@ -708,6 +712,7 @@ static irqreturn_t mtu3_u2_common_isr(struct mtu3 *mtu)
u2comm &= mtu3_readl(mbase, U3D_COMMON_USB_INTR_ENABLE);
mtu3_writel(mbase, U3D_COMMON_USB_INTR, u2comm); /* W1C */
dev_dbg(mtu->dev, "=== U2COMM[%x] ===\n", u2comm);
trace_mtu3_u2_common_isr(u2comm);
if (u2comm & SUSPEND_INTR)
mtu3_gadget_suspend(mtu);

8
drivers/usb/mtu3/mtu3_debug.h
View File

@ -39,4 +39,12 @@ static inline void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb) {}
#endif /* CONFIG_DEBUG_FS */
#if IS_ENABLED(CONFIG_TRACING)
void mtu3_dbg_trace(struct device *dev, const char *fmt, ...);
#else
static inline void mtu3_dbg_trace(struct device *dev, const char *fmt, ...) {}
#endif /* CONFIG_TRACING */
#endif /* __MTU3_DEBUG_H__ */

1
drivers/usb/mtu3/mtu3_dr.c
View File

@ -141,6 +141,7 @@ static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
struct mtu3 *mtu = ssusb->u3d;
dev_dbg(ssusb->dev, "mailbox state(%d)\n", status);
mtu3_dbg_trace(ssusb->dev, "mailbox %d", status);
switch (status) {
case MTU3_ID_GROUND:

14
drivers/usb/mtu3/mtu3_gadget.c
View File

@ -8,6 +8,7 @@
*/
#include "mtu3.h"
#include "mtu3_trace.h"
void mtu3_req_complete(struct mtu3_ep *mep,
struct usb_request *req, int status)
@ -25,6 +26,8 @@ __acquires(mep->mtu->lock)
mtu = mreq->mtu;
mep->busy = 1;
trace_mtu3_req_complete(mreq);
spin_unlock(&mtu->lock);
/* ep0 makes use of PIO, needn't unmap it */
@ -201,6 +204,7 @@ error:
spin_unlock_irqrestore(&mtu->lock, flags);
dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep);
trace_mtu3_gadget_ep_enable(mep);
return ret;
}
@ -212,6 +216,7 @@ static int mtu3_gadget_ep_disable(struct usb_ep *ep)
unsigned long flags;
dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name);
trace_mtu3_gadget_ep_disable(mep);
if (!(mep->flags & MTU3_EP_ENABLED)) {
dev_warn(mtu->dev, "%s is already disabled\n", mep->name);
@ -242,13 +247,17 @@ struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
mreq->request.dma = DMA_ADDR_INVALID;
mreq->epnum = mep->epnum;
mreq->mep = mep;
trace_mtu3_alloc_request(mreq);
return &mreq->request;
}
void mtu3_free_request(struct usb_ep *ep, struct usb_request *req)
{
kfree(to_mtu3_request(req));
struct mtu3_request *mreq = to_mtu3_request(req);
trace_mtu3_free_request(mreq);
kfree(mreq);
}
static int mtu3_gadget_queue(struct usb_ep *ep,
@ -316,6 +325,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
error:
spin_unlock_irqrestore(&mtu->lock, flags);
trace_mtu3_gadget_queue(mreq);
return ret;
}
@ -333,6 +343,7 @@ static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req)
return -EINVAL;
dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req);
trace_mtu3_gadget_dequeue(mreq);
spin_lock_irqsave(&mtu->lock, flags);
@ -403,6 +414,7 @@ static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value)
done:
spin_unlock_irqrestore(&mtu->lock, flags);
trace_mtu3_gadget_ep_set_halt(mep);
return ret;
}

4
drivers/usb/mtu3/mtu3_gadget_ep0.c
View File

@ -11,6 +11,8 @@
#include <linux/usb/composite.h>
#include "mtu3.h"
#include "mtu3_debug.h"
#include "mtu3_trace.h"
/* ep0 is always mtu3->in_eps[0] */
#define next_ep0_request(mtu) next_request((mtu)->ep0)
@ -634,6 +636,7 @@ __acquires(mtu->lock)
int handled = 0;
ep0_read_setup(mtu, &setup);
trace_mtu3_handle_setup(&setup);
if ((setup.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
handled = handle_standard_request(mtu, &setup);
@ -710,6 +713,7 @@ irqreturn_t mtu3_ep0_isr(struct mtu3 *mtu)
ret = IRQ_HANDLED;
}
dev_dbg(mtu->dev, "ep0_state: %s\n", decode_ep0_state(mtu));
mtu3_dbg_trace(mtu->dev, "ep0_state %s", decode_ep0_state(mtu));
switch (mtu->ep0_state) {
case MU3D_EP0_STATE_TX:

7
drivers/usb/mtu3/mtu3_qmu.c
View File

@ -22,6 +22,7 @@
#include <linux/iopoll.h>
#include "mtu3.h"
#include "mtu3_trace.h"
#define QMU_CHECKSUM_LEN 16
@ -275,6 +276,7 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_IOC | GPD_FLAGS_HWO);
mreq->gpd = gpd;
trace_mtu3_prepare_gpd(mep, gpd);
return 0;
}
@ -307,6 +309,7 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq)
gpd->dw0_info |= cpu_to_le32(GPD_FLAGS_IOC | GPD_FLAGS_HWO);
mreq->gpd = gpd;
trace_mtu3_prepare_gpd(mep, gpd);
return 0;
}
@ -431,6 +434,7 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum)
}
dev_dbg(mtu->dev, "%s send ZLP for req=%p\n", __func__, mreq);
trace_mtu3_zlp_exp_gpd(mep, gpd_current);
mtu3_clrbits(mbase, MU3D_EP_TXCR0(mep->epnum), TX_DMAREQEN);
@ -486,6 +490,7 @@ static void qmu_done_tx(struct mtu3 *mtu, u8 epnum)
request = &mreq->request;
request->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
trace_mtu3_complete_gpd(mep, gpd);
mtu3_req_complete(mep, request, 0);
gpd = advance_deq_gpd(ring);
@ -524,6 +529,7 @@ static void qmu_done_rx(struct mtu3 *mtu, u8 epnum)
req = &mreq->request;
req->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
trace_mtu3_complete_gpd(mep, gpd);
mtu3_req_complete(mep, req, 0);
gpd = advance_deq_gpd(ring);
@ -601,6 +607,7 @@ irqreturn_t mtu3_qmu_isr(struct mtu3 *mtu)
dev_dbg(mtu->dev, "=== QMUdone[tx=%x, rx=%x] QMUexp[%x] ===\n",
(qmu_done_status & 0xFFFF), qmu_done_status >> 16,
qmu_status);
trace_mtu3_qmu_isr(qmu_done_status, qmu_status);
if (qmu_done_status)
qmu_done_isr(mtu, qmu_done_status);

23
drivers/usb/mtu3/mtu3_trace.c Normal file
View File

@ -0,0 +1,23 @@
// SPDX-License-Identifier: GPL-2.0
/**
* mtu3_trace.c - trace support
*
* Copyright (C) 2019 MediaTek Inc.
*
* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
*/
#define CREATE_TRACE_POINTS
#include "mtu3_trace.h"
void mtu3_dbg_trace(struct device *dev, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
trace_mtu3_log(dev, &vaf);
va_end(args);
}

279
drivers/usb/mtu3/mtu3_trace.h Normal file
View File

@ -0,0 +1,279 @@
// SPDX-License-Identifier: GPL-2.0
/**
* mtu3_trace.h - trace support
*
* Copyright (C) 2019 MediaTek Inc.
*
* Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM mtu3
#if !defined(__MTU3_TRACE_H__) || defined(TRACE_HEADER_MULTI_READ)
#define __MTU3_TRACE_H__
#include <linux/types.h>
#include <linux/tracepoint.h>
#include "mtu3.h"
#define MTU3_MSG_MAX 256
TRACE_EVENT(mtu3_log,
TP_PROTO(struct device *dev, struct va_format *vaf),
TP_ARGS(dev, vaf),
TP_STRUCT__entry(
__string(name, dev_name(dev))
__dynamic_array(char, msg, MTU3_MSG_MAX)
),
TP_fast_assign(
__assign_str(name, dev_name(dev));
vsnprintf(__get_str(msg), MTU3_MSG_MAX, vaf->fmt, *vaf->va);
),
TP_printk("%s: %s", __get_str(name), __get_str(msg))
);
TRACE_EVENT(mtu3_u3_ltssm_isr,
TP_PROTO(u32 intr),
TP_ARGS(intr),
TP_STRUCT__entry(
__field(u32, intr)
),
TP_fast_assign(
__entry->intr = intr;
),
TP_printk("(%08x) %s %s %s %s %s %s", __entry->intr,
__entry->intr & HOT_RST_INTR ? "HOT_RST" : "",
__entry->intr & WARM_RST_INTR ? "WARM_RST" : "",
__entry->intr & ENTER_U3_INTR ? "ENT_U3" : "",
__entry->intr & EXIT_U3_INTR ? "EXIT_U3" : "",
__entry->intr & VBUS_RISE_INTR ? "VBUS_RISE" : "",
__entry->intr & VBUS_FALL_INTR ? "VBUS_FALL" : ""
)
);
TRACE_EVENT(mtu3_u2_common_isr,
TP_PROTO(u32 intr),
TP_ARGS(intr),
TP_STRUCT__entry(
__field(u32, intr)
),
TP_fast_assign(
__entry->intr = intr;
),
TP_printk("(%08x) %s %s %s", __entry->intr,
__entry->intr & SUSPEND_INTR ? "SUSPEND" : "",
__entry->intr & RESUME_INTR ? "RESUME" : "",
__entry->intr & RESET_INTR ? "RESET" : ""
)
);
TRACE_EVENT(mtu3_qmu_isr,
TP_PROTO(u32 done_intr, u32 exp_intr),
TP_ARGS(done_intr, exp_intr),
TP_STRUCT__entry(
__field(u32, done_intr)
__field(u32, exp_intr)
),
TP_fast_assign(
__entry->done_intr = done_intr;
__entry->exp_intr = exp_intr;
),
TP_printk("done (tx %04x, rx %04x), exp (%08x)",
__entry->done_intr & 0xffff,
__entry->done_intr >> 16,
__entry->exp_intr
)
);
DECLARE_EVENT_CLASS(mtu3_log_setup,
TP_PROTO(struct usb_ctrlrequest *setup),
TP_ARGS(setup),
TP_STRUCT__entry(
__field(__u8, bRequestType)
__field(__u8, bRequest)
__field(__u16, wValue)
__field(__u16, wIndex)
__field(__u16, wLength)
),
TP_fast_assign(
__entry->bRequestType = setup->bRequestType;
__entry->bRequest = setup->bRequest;
__entry->wValue = le16_to_cpu(setup->wValue);
__entry->wIndex = le16_to_cpu(setup->wIndex);
__entry->wLength = le16_to_cpu(setup->wLength);
),
TP_printk("setup - %02x %02x %04x %04x %04x",
__entry->bRequestType, __entry->bRequest,
__entry->wValue, __entry->wIndex, __entry->wLength
)
);
DEFINE_EVENT(mtu3_log_setup, mtu3_handle_setup,
TP_PROTO(struct usb_ctrlrequest *setup),
TP_ARGS(setup)
);
DECLARE_EVENT_CLASS(mtu3_log_request,
TP_PROTO(struct mtu3_request *mreq),
TP_ARGS(mreq),
TP_STRUCT__entry(
__string(name, mreq->mep->name)
__field(struct mtu3_request *, mreq)
__field(struct qmu_gpd *, gpd)
__field(unsigned int, actual)
__field(unsigned int, length)
__field(int, status)
__field(int, zero)
__field(int, no_interrupt)
),
TP_fast_assign(
__assign_str(name, mreq->mep->name);
__entry->mreq = mreq;
__entry->gpd = mreq->gpd;
__entry->actual = mreq->request.actual;
__entry->length = mreq->request.length;
__entry->status = mreq->request.status;
__entry->zero = mreq->request.zero;
__entry->no_interrupt = mreq->request.no_interrupt;
),
TP_printk("%s: req %p gpd %p len %u/%u %s%s --> %d",
__get_str(name), __entry->mreq, __entry->gpd,
__entry->actual, __entry->length,
__entry->zero ? "Z" : "z",
__entry->no_interrupt ? "i" : "I",
__entry->status
)
);
DEFINE_EVENT(mtu3_log_request, mtu3_alloc_request,
TP_PROTO(struct mtu3_request *req),
TP_ARGS(req)
);
DEFINE_EVENT(mtu3_log_request, mtu3_free_request,
TP_PROTO(struct mtu3_request *req),
TP_ARGS(req)
);
DEFINE_EVENT(mtu3_log_request, mtu3_gadget_queue,
TP_PROTO(struct mtu3_request *req),
TP_ARGS(req)
);
DEFINE_EVENT(mtu3_log_request, mtu3_gadget_dequeue,
TP_PROTO(struct mtu3_request *req),
TP_ARGS(req)
);
DEFINE_EVENT(mtu3_log_request, mtu3_req_complete,
TP_PROTO(struct mtu3_request *req),
TP_ARGS(req)
);
DECLARE_EVENT_CLASS(mtu3_log_gpd,
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
TP_ARGS(mep, gpd),
TP_STRUCT__entry(
__string(name, mep->name)
__field(struct qmu_gpd *, gpd)
__field(u32, dw0)
__field(u32, dw1)
__field(u32, dw2)
__field(u32, dw3)
),
TP_fast_assign(
__assign_str(name, mep->name);
__entry->gpd = gpd;
__entry->dw0 = le32_to_cpu(gpd->dw0_info);
__entry->dw1 = le32_to_cpu(gpd->next_gpd);
__entry->dw2 = le32_to_cpu(gpd->buffer);
__entry->dw3 = le32_to_cpu(gpd->dw3_info);
),
TP_printk("%s: gpd %p - %08x %08x %08x %08x",
__get_str(name), __entry->gpd,
__entry->dw0, __entry->dw1,
__entry->dw2, __entry->dw3
)
);
DEFINE_EVENT(mtu3_log_gpd, mtu3_prepare_gpd,
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
TP_ARGS(mep, gpd)
);
DEFINE_EVENT(mtu3_log_gpd, mtu3_complete_gpd,
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
TP_ARGS(mep, gpd)
);
DEFINE_EVENT(mtu3_log_gpd, mtu3_zlp_exp_gpd,
TP_PROTO(struct mtu3_ep *mep, struct qmu_gpd *gpd),
TP_ARGS(mep, gpd)
);
DECLARE_EVENT_CLASS(mtu3_log_ep,
TP_PROTO(struct mtu3_ep *mep),
TP_ARGS(mep),
TP_STRUCT__entry(
__string(name, mep->name)
__field(unsigned int, type)
__field(unsigned int, slot)
__field(unsigned int, maxp)
__field(unsigned int, mult)
__field(unsigned int, maxburst)
__field(unsigned int, flags)
__field(unsigned int, direction)
__field(struct mtu3_gpd_ring *, gpd_ring)
),
TP_fast_assign(
__assign_str(name, mep->name);
__entry->type = mep->type;
__entry->slot = mep->slot;
__entry->maxp = mep->ep.maxpacket;
__entry->mult = mep->ep.mult;
__entry->maxburst = mep->ep.maxburst;
__entry->flags = mep->flags;
__entry->direction = mep->is_in;
__entry->gpd_ring = &mep->gpd_ring;
),
TP_printk("%s: type %d maxp %d slot %d mult %d burst %d ring %p/%pad flags %c:%c%c%c:%c",
__get_str(name), __entry->type,
__entry->maxp, __entry->slot,
__entry->mult, __entry->maxburst,
__entry->gpd_ring, &__entry->gpd_ring->dma,
__entry->flags & MTU3_EP_ENABLED ? 'E' : 'e',
__entry->flags & MTU3_EP_STALL ? 'S' : 's',
__entry->flags & MTU3_EP_WEDGE ? 'W' : 'w',
__entry->flags & MTU3_EP_BUSY ? 'B' : 'b',
__entry->direction ? '<' : '>'
)
);
DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_enable,
TP_PROTO(struct mtu3_ep *mep),
TP_ARGS(mep)
);
DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_disable,
TP_PROTO(struct mtu3_ep *mep),
TP_ARGS(mep)
);
DEFINE_EVENT(mtu3_log_ep, mtu3_gadget_ep_set_halt,
TP_PROTO(struct mtu3_ep *mep),
TP_ARGS(mep)
);
#endif /* __MTU3_TRACE_H__ */
/* this part has to be here */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE mtu3_trace
#include <trace/define_trace.h>