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Implement new libusb v2.0 API function, libusb20_dev_get_stats().

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This function is useful when debugging USB device issues.

MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
hselasky 2019-12-27 20:35:12 +00:00
parent 95e7d34b45
commit 37ff270164
6 changed files with 73 additions and 2 deletions
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1
lib/libusb/Makefile
View File

@ -219,6 +219,7 @@ MLINKS += libusb20.3 libusb20_dev_get_backend_name.3
MLINKS += libusb20.3 libusb20_dev_get_info.3
MLINKS += libusb20.3 libusb20_dev_get_iface_desc.3
MLINKS += libusb20.3 libusb20_dev_get_desc.3
MLINKS += libusb20.3 libusb20_dev_get_stats.3
MLINKS += libusb20.3 libusb20_dev_close.3
MLINKS += libusb20.3 libusb20_dev_detach_kernel_driver.3
MLINKS += libusb20.3 libusb20_dev_set_config_index.3

14
lib/libusb/libusb20.3
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@ -1,5 +1,5 @@
.\"
.\" Copyright (c) 2008 Hans Petter Selasky
.\" Copyright (c) 2008-2019 Hans Petter Selasky
.\"
.\" All rights reserved.
.\"
@ -26,7 +26,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd May 3, 2013
.Dd December 27, 2019
.Dt LIBUSB20 3
.Os
.Sh NAME
@ -122,6 +122,8 @@ USB access library (libusb -lusb)
.Ft const char *
.Fn libusb20_dev_get_desc "struct libusb20_device *pdev"
.Ft int
.Fn libusb20_dev_get_stats "struct libusb20_device *pdev" "struct libusb20_device_stats *pstats"
.Ft int
.Fn libusb20_dev_close "struct libusb20_device *pdev"
.Ft int
.Fn libusb20_dev_detach_kernel_driver "struct libusb20_device *pdev" "uint8_t iface_index"
@ -597,6 +599,14 @@ The format of the string is: "drivername<unit>: <description>"
.
.Pp
.
.Fn libusb20_dev_get_stats
retrieves the device statistics into the structure pointed to by the
.Fa pstats
argument.
This function returns zero on success else a LIBUSB20_ERROR value is returned.
.
.Pp
.
.Fn libusb20_dev_close
will close the given USB device.
.

26
lib/libusb/libusb20.c
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@ -78,6 +78,7 @@ dummy_callback(struct libusb20_transfer *xfer)
#define dummy_set_power_mode (void *)dummy_int
#define dummy_get_power_mode (void *)dummy_int
#define dummy_get_power_usage (void *)dummy_int
#define dummy_get_stats (void *)dummy_int
#define dummy_kernel_driver_active (void *)dummy_int
#define dummy_detach_kernel_driver (void *)dummy_int
#define dummy_do_request_sync (void *)dummy_int
@ -1049,6 +1050,31 @@ libusb20_dev_get_speed(struct libusb20_device *pdev)
return (pdev->usb_speed);
}
int
libusb20_dev_get_stats(struct libusb20_device *pdev, struct libusb20_device_stats *pstats)
{
uint8_t do_close;
int error;
if (!pdev->is_opened) {
error = libusb20_dev_open(pdev, 0);
if (error == 0) {
do_close = 1;
} else {
do_close = 0;
}
} else {
do_close = 0;
}
error = pdev->methods->get_stats(pdev, pstats);
if (do_close)
(void) libusb20_dev_close(pdev);
return (error);
}
/* if this function returns an error, the device is gone */
int
libusb20_dev_process(struct libusb20_device *pdev)

7
lib/libusb/libusb20.h
View File

@ -195,6 +195,12 @@ struct libusb20_quirk {
char quirkname[64 - 12];
};
struct libusb20_device_stats {
uint64_t xfer_ok[4]; /* sorted by USB transfer type, UE_XXX */
uint64_t xfer_fail[4]; /* sorted by USB transfer type, UE_XXX */
uint64_t xfer_reserved[24]; /* reserved */
};
#define LIBUSB20_MAX_FRAME_PRE_SCALE (1U << 31)
/* USB transfer operations */
@ -243,6 +249,7 @@ int libusb20_dev_detach_kernel_driver(struct libusb20_device *pdev, uint8_t ifac
int libusb20_dev_set_config_index(struct libusb20_device *pdev, uint8_t configIndex);
int libusb20_dev_get_debug(struct libusb20_device *pdev);
int libusb20_dev_get_fd(struct libusb20_device *pdev);
int libusb20_dev_get_stats(struct libusb20_device *pdev, struct libusb20_device_stats *pstat);
int libusb20_dev_kernel_driver_active(struct libusb20_device *pdev, uint8_t iface_index);
int libusb20_dev_open(struct libusb20_device *pdev, uint16_t transfer_max);
int libusb20_dev_process(struct libusb20_device *pdev);

3
lib/libusb/libusb20_int.h
View File

@ -108,10 +108,12 @@ typedef int (libusb20_reset_device_t)(struct libusb20_device *pdev);
typedef int (libusb20_set_power_mode_t)(struct libusb20_device *pdev, uint8_t power_mode);
typedef int (libusb20_get_power_mode_t)(struct libusb20_device *pdev, uint8_t *power_mode);
typedef int (libusb20_get_power_usage_t)(struct libusb20_device *pdev, uint16_t *power_usage);
typedef int (libusb20_get_stats_t)(struct libusb20_device *pdev, struct libusb20_device_stats *pstats);
typedef int (libusb20_set_alt_index_t)(struct libusb20_device *pdev, uint8_t iface_index, uint8_t alt_index);
typedef int (libusb20_set_config_index_t)(struct libusb20_device *pdev, uint8_t index);
typedef int (libusb20_check_connected_t)(struct libusb20_device *pdev);
/* USB transfer specific */
typedef int (libusb20_tr_open_t)(struct libusb20_transfer *xfer, uint32_t MaxBufSize, uint32_t MaxFrameCount, uint8_t ep_no, uint16_t stream_id, uint8_t pre_scale);
typedef int (libusb20_tr_close_t)(struct libusb20_transfer *xfer);
@ -131,6 +133,7 @@ typedef void (libusb20_tr_cancel_async_t)(struct libusb20_transfer *xfer);
m(n, set_power_mode) \
m(n, get_power_mode) \
m(n, get_power_usage) \
m(n, get_stats) \
m(n, set_alt_index) \
m(n, set_config_index) \
m(n, tr_cancel_async) \

24
lib/libusb/libusb20_ugen20.c
View File

@ -80,6 +80,7 @@ static libusb20_check_connected_t ugen20_check_connected;
static libusb20_set_power_mode_t ugen20_set_power_mode;
static libusb20_get_power_mode_t ugen20_get_power_mode;
static libusb20_get_power_usage_t ugen20_get_power_usage;
static libusb20_get_stats_t ugen20_get_stats;
static libusb20_kernel_driver_active_t ugen20_kernel_driver_active;
static libusb20_detach_kernel_driver_t ugen20_detach_kernel_driver;
static libusb20_do_request_sync_t ugen20_do_request_sync;
@ -669,6 +670,29 @@ ugen20_get_power_usage(struct libusb20_device *pdev, uint16_t *power_usage)
return (0); /* success */
}
static int
ugen20_get_stats(struct libusb20_device *pdev, struct libusb20_device_stats *pstats)
{
struct usb_device_stats st;
if (ioctl(pdev->file_ctrl, IOUSB(USB_DEVICESTATS), &st))
return (LIBUSB20_ERROR_OTHER);
memset(pstats, 0, sizeof(*pstats));
pstats->xfer_ok[0] = st.uds_requests_ok[0];
pstats->xfer_ok[1] = st.uds_requests_ok[1];
pstats->xfer_ok[2] = st.uds_requests_ok[2];
pstats->xfer_ok[3] = st.uds_requests_ok[3];
pstats->xfer_fail[0] = st.uds_requests_fail[0];
pstats->xfer_fail[1] = st.uds_requests_fail[1];
pstats->xfer_fail[2] = st.uds_requests_fail[2];
pstats->xfer_fail[3] = st.uds_requests_fail[3];
return (0); /* success */
}
static int
ugen20_kernel_driver_active(struct libusb20_device *pdev,
uint8_t iface_index)