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can: peak_usb: CANFD: store 64-bits hw timestamps

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This patch allows to use the whole 64-bit timestamps received from the
CAN-FD device (expressed in µs) rather than only its low part, in the
hwtstamp structure of the skb transferred to the network layer, when a
CAN/CANFD frame has been received.

Link: https://lore.kernel.org/all/20210930094603.23134-1-s.grosjean@peak-system.com
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2021-09-30 11:46:03 +02:00 committed by Marc Kleine-Budde
parent 108194666a
commit 28e0a70ced
3 changed files with 20 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/can/usb/peak_usb/pcan_usb_core.c
View File

@ -205,6 +205,19 @@ int peak_usb_netif_rx(struct sk_buff *skb,
return netif_rx(skb);
}
/* post received skb with native 64-bit hw timestamp */
int peak_usb_netif_rx_64(struct sk_buff *skb, u32 ts_low, u32 ts_high)
{
struct skb_shared_hwtstamps *hwts = skb_hwtstamps(skb);
u64 ns_ts;
ns_ts = (u64)ts_high << 32 | ts_low;
ns_ts *= NSEC_PER_USEC;
hwts->hwtstamp = ns_to_ktime(ns_ts);
return netif_rx(skb);
}
/*
* callback for bulk Rx urb
*/

1
drivers/net/can/usb/peak_usb/pcan_usb_core.h
View File

@ -143,6 +143,7 @@ void peak_usb_set_ts_now(struct peak_time_ref *time_ref, u32 ts_now);
void peak_usb_get_ts_time(struct peak_time_ref *time_ref, u32 ts, ktime_t *tv);
int peak_usb_netif_rx(struct sk_buff *skb,
struct peak_time_ref *time_ref, u32 ts_low);
int peak_usb_netif_rx_64(struct sk_buff *skb, u32 ts_low, u32 ts_high);
void peak_usb_async_complete(struct urb *urb);
void peak_usb_restart_complete(struct peak_usb_device *dev);

9
drivers/net/can/usb/peak_usb/pcan_usb_fd.c
View File

@ -515,7 +515,8 @@ static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
netdev->stats.rx_packets++;
netdev->stats.rx_bytes += cfd->len;
peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(rm->ts_low));
peak_usb_netif_rx_64(skb, le32_to_cpu(rm->ts_low),
le32_to_cpu(rm->ts_high));
return 0;
}
@ -579,7 +580,8 @@ static int pcan_usb_fd_decode_status(struct pcan_usb_fd_if *usb_if,
netdev->stats.rx_packets++;
netdev->stats.rx_bytes += cf->len;
peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(sm->ts_low));
peak_usb_netif_rx_64(skb, le32_to_cpu(sm->ts_low),
le32_to_cpu(sm->ts_high));
return 0;
}
@ -629,7 +631,8 @@ static int pcan_usb_fd_decode_overrun(struct pcan_usb_fd_if *usb_if,
cf->can_id |= CAN_ERR_CRTL;
cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
peak_usb_netif_rx(skb, &usb_if->time_ref, le32_to_cpu(ov->ts_low));
peak_usb_netif_rx_64(skb, le32_to_cpu(ov->ts_low),
le32_to_cpu(ov->ts_high));
netdev->stats.rx_over_errors++;
netdev->stats.rx_errors++;