aleph/lkl_linux
1
0
Fork 0
mirror of https://github.com/lkl/linux.git synced 2025-12-19 16:13:19 +09:00
Code Issues Packages Projects Releases Wiki Activity

net: dsa: microchip: ptp: add packet transmission timestamping

Browse Source 
This patch adds the routines for transmission of ptp packets. When the
ptp pdelay_req packet to be transmitted, it uses the deferred xmit
worker to schedule the packets.
During irq_setup, interrupt for Sync, Pdelay_req and Pdelay_rsp are
enabled. So interrupt is triggered for all three packets. But for
p2p1step, we require only time stamp of Pdelay_req packet. Hence to
avoid posting of the completion from ISR routine for Sync and
Pdelay_resp packets, ts_en flag is introduced. This controls which
packets need to processed for timestamp.
After the packet is transmitted, ISR is triggered. The time at which
packet transmitted is recorded to separate register.
This value is reconstructed to absolute time and posted to the user
application through socket error queue.

Signed-off-by: Christian Eggers <ceggers@arri.de>
Co-developed-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christian Eggers
2023-01-10 14:19:25 +05:30
committed by David S. Miller
parent 90188fff65
commit ab32f56a41
6 changed files with 196 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/dsa/ksz_common.h
View File

@@ -23,11 +23,19 @@ static inline ktime_t ksz_decode_tstamp(u32 tstamp)
return ns_to_ktime(ns);
}
struct ksz_deferred_xmit_work {
struct dsa_port *dp;
struct sk_buff *skb;
struct kthread_work work;
};
struct ksz_tagger_data {
void (*xmit_work_fn)(struct kthread_work *work);
void (*hwtstamp_set_state)(struct dsa_switch *ds, bool on);
};
struct ksz_skb_cb {
struct sk_buff *clone;
u32 tstamp;
};