[PATCH v1 3/4] net: sock: extend SO_TIMESTAMPING for DMA Fetch
From: Muhammad Husaini Zulkifli <hidden>
Date: 2022-09-27 13:08:38
Also in:
intel-wired-lan
Subsystem:
networking [ethtool], networking [general], networking [sockets], socket timestamping, the rest · Maintainers:
Andrew Lunn, Jakub Kicinski, "David S. Miller", Eric Dumazet, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
This patch is to extend SO_TIMESTAMPING API to support the DMA Time Stamp by adding a new flag SOF_TIMESTAMPING_TX_HARDWARE_DMA_FETCH. User space application can configure this flag into hwtstamp_config flag if require to use the DMA Time Stamp for that socket application. Suggested-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Signed-off-by: Muhammad Husaini Zulkifli <redacted> --- include/linux/skbuff.h | 3 +++ include/uapi/linux/net_tstamp.h | 6 ++++-- net/ethtool/common.c | 1 + net/socket.c | 3 +++ 4 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index f15d5b62539b..7a79ffa7799d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h@@ -485,6 +485,9 @@ enum { /* generate software time stamp when entering packet scheduling */ SKBTX_SCHED_TSTAMP = 1 << 6, + + /* generate hardware DMA time stamp */ + SKBTX_HW_DMA_TSTAMP = 1 << 7, }; #define SKBTX_ANY_SW_TSTAMP (SKBTX_SW_TSTAMP | \
diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index 4966d5ca521f..c9e113cea883 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h@@ -31,8 +31,9 @@ enum { SOF_TIMESTAMPING_OPT_PKTINFO = (1<<13), SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14), SOF_TIMESTAMPING_BIND_PHC = (1 << 15), + SOF_TIMESTAMPING_TX_HARDWARE_DMA_FETCH = (1 << 16), - SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_BIND_PHC, + SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_TX_HARDWARE_DMA_FETCH, SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) | SOF_TIMESTAMPING_LAST };
@@ -45,7 +46,8 @@ enum { #define SOF_TIMESTAMPING_TX_RECORD_MASK (SOF_TIMESTAMPING_TX_HARDWARE | \ SOF_TIMESTAMPING_TX_SOFTWARE | \ SOF_TIMESTAMPING_TX_SCHED | \ - SOF_TIMESTAMPING_TX_ACK) + SOF_TIMESTAMPING_TX_ACK | \ + SOF_TIMESTAMPING_TX_HARDWARE_DMA_FETCH) /** * struct so_timestamping - SO_TIMESTAMPING parameter
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index f2a178d162ef..24f8e7f9b4a5 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c@@ -403,6 +403,7 @@ const char sof_timestamping_names[][ETH_GSTRING_LEN] = { [const_ilog2(SOF_TIMESTAMPING_OPT_PKTINFO)] = "option-pktinfo", [const_ilog2(SOF_TIMESTAMPING_OPT_TX_SWHW)] = "option-tx-swhw", [const_ilog2(SOF_TIMESTAMPING_BIND_PHC)] = "bind-phc", + [const_ilog2(SOF_TIMESTAMPING_TX_HARDWARE_DMA_FETCH)] = "hardware-dma-transmit", }; static_assert(ARRAY_SIZE(sof_timestamping_names) == __SOF_TIMESTAMPING_CNT);
diff --git a/net/socket.c b/net/socket.c
index 34ddb5d6889e..dfb9fa693a11 100644
--- a/net/socket.c
+++ b/net/socket.c@@ -695,6 +695,9 @@ void __sock_tx_timestamp(__u32 tsflags, __u8 *tx_flags) flags |= SKBTX_HW_TSTAMP_USE_CYCLES; } + if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE_DMA_FETCH) + flags |= SKBTX_HW_DMA_TSTAMP; + if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) flags |= SKBTX_SW_TSTAMP;
--
2.17.1