diff mbox series

[bpf-next,v5,3/4] net: stmmac: Add launch time support to XDP ZC

Message ID 20250114152718.120588-4-yoong.siang.song@intel.com (mailing list archive)
State New
Delegated to: BPF
Headers show
Series xsk: TX metadata Launch Time support | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for bpf-next
netdev/apply fail Patch does not apply to bpf-next-0
bpf/vmtest-bpf-next-VM_Test-0 success Logs for Lint
bpf/vmtest-bpf-next-VM_Test-1 success Logs for ShellCheck
bpf/vmtest-bpf-next-VM_Test-2 success Logs for Unittests
bpf/vmtest-bpf-next-VM_Test-3 success Logs for Validate matrix.py
bpf/vmtest-bpf-next-VM_Test-5 success Logs for aarch64-gcc / build-release
bpf/vmtest-bpf-next-VM_Test-4 fail Logs for aarch64-gcc / build / build for aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-6 success Logs for aarch64-gcc / test
bpf/vmtest-bpf-next-VM_Test-7 success Logs for aarch64-gcc / veristat-kernel
bpf/vmtest-bpf-next-VM_Test-8 success Logs for aarch64-gcc / veristat-meta
bpf/vmtest-bpf-next-VM_Test-10 success Logs for s390x-gcc / build-release
bpf/vmtest-bpf-next-VM_Test-9 fail Logs for s390x-gcc / build / build for s390x with gcc
bpf/vmtest-bpf-next-VM_Test-11 success Logs for s390x-gcc / test
bpf/vmtest-bpf-next-VM_Test-12 success Logs for s390x-gcc / veristat-kernel
bpf/vmtest-bpf-next-VM_Test-13 success Logs for s390x-gcc / veristat-meta
bpf/vmtest-bpf-next-VM_Test-14 success Logs for set-matrix
bpf/vmtest-bpf-next-VM_Test-15 fail Logs for x86_64-gcc / build / build for x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-16 success Logs for x86_64-gcc / build-release
bpf/vmtest-bpf-next-VM_Test-17 success Logs for x86_64-gcc / test
bpf/vmtest-bpf-next-VM_Test-18 success Logs for x86_64-gcc / veristat-kernel
bpf/vmtest-bpf-next-VM_Test-19 success Logs for x86_64-gcc / veristat-meta
bpf/vmtest-bpf-next-VM_Test-20 success Logs for x86_64-llvm-17 / build / build for x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-21 success Logs for x86_64-llvm-17 / build-release / build for x86_64 with llvm-17-O2
bpf/vmtest-bpf-next-VM_Test-26 success Logs for x86_64-llvm-17 / veristat-kernel
bpf/vmtest-bpf-next-VM_Test-28 success Logs for x86_64-llvm-18 / build / build for x86_64 with llvm-18
bpf/vmtest-bpf-next-VM_Test-27 success Logs for x86_64-llvm-17 / veristat-meta
bpf/vmtest-bpf-next-VM_Test-29 success Logs for x86_64-llvm-18 / build-release / build for x86_64 with llvm-18-O2
bpf/vmtest-bpf-next-VM_Test-35 success Logs for x86_64-llvm-18 / veristat-kernel
bpf/vmtest-bpf-next-VM_Test-36 success Logs for x86_64-llvm-18 / veristat-meta
bpf/vmtest-bpf-next-VM_Test-25 success Logs for x86_64-llvm-17 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-34 success Logs for x86_64-llvm-18 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-18
bpf/vmtest-bpf-next-PR fail PR summary
bpf/vmtest-bpf-next-VM_Test-22 success Logs for x86_64-llvm-17 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-23 success Logs for x86_64-llvm-17 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-24 success Logs for x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17
bpf/vmtest-bpf-next-VM_Test-30 success Logs for x86_64-llvm-18 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-18
bpf/vmtest-bpf-next-VM_Test-31 success Logs for x86_64-llvm-18 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-18
bpf/vmtest-bpf-next-VM_Test-32 success Logs for x86_64-llvm-18 / test (test_progs_cpuv4, false, 360) / test_progs_cpuv4 on x86_64 with llvm-18
bpf/vmtest-bpf-next-VM_Test-33 success Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18

Commit Message

Song Yoong Siang Jan. 14, 2025, 3:27 p.m. UTC 
Enable launch time (Time-Based Scheduling) support to XDP zero copy via XDP
Tx metadata framework.

This patch is tested with tools/testing/selftests/bpf/xdp_hw_metadata on
Intel Tiger Lake platform. Below are the test steps and result.

Test Steps:
1. At DUT, start xdp_hw_metadata selftest application:
   $ sudo ./xdp_hw_metadata enp0s30f4 -l 1000000000 -L 1

2. At Link Partner, send an UDP packet with VLAN priority 1 to port 9091 of
   DUT.

When launch time is set to 1s in the future, the delta between launch time
and transmit hardware timestamp is equal to 16.963us, as shown in result
below:
  0x55b5864717a8: rx_desc[4]->addr=88100 addr=88100 comp_addr=88100 EoP
  No rx_hash, err=-95
  HW RX-time:   1734579065767717328 (sec:1734579065.7677) delta to User RX-time sec:0.0004 (375.624 usec)
  XDP RX-time:   1734579065768004454 (sec:1734579065.7680) delta to User RX-time sec:0.0001 (88.498 usec)
  No rx_vlan_tci or rx_vlan_proto, err=-95
  0x55b5864717a8: ping-pong with csum=5619 (want 0000) csum_start=34 csum_offset=6
  HW RX-time:   1734579065767717328 (sec:1734579065.7677) delta to HW Launch-time sec:1.0000 (1000000.000 usec)
  0x55b5864717a8: complete tx idx=4 addr=4018
  HW Launch-time:   1734579066767717328 (sec:1734579066.7677) delta to HW TX-complete-time sec:0.0000 (16.963 usec)
  HW TX-complete-time:   1734579066767734291 (sec:1734579066.7677) delta to User TX-complete-time sec:0.0001 (130.408 usec)
  XDP RX-time:   1734579065768004454 (sec:1734579065.7680) delta to User TX-complete-time sec:0.9999 (999860.245 usec)
  HW RX-time:   1734579065767717328 (sec:1734579065.7677) delta to HW TX-complete-time sec:1.0000 (1000016.963 usec)
  0x55b5864717a8: complete rx idx=132 addr=88100

Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac.h      |  2 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 13 +++++++++++++
 2 files changed, 15 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index b8d631e559c0..11f7b539c4b5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -106,6 +106,8 @@  struct stmmac_metadata_request {
 	struct stmmac_priv *priv;
 	struct dma_desc *tx_desc;
 	bool *set_ic;
+	struct dma_edesc *edesc;
+	int tbs;
 };
 
 struct stmmac_xsk_tx_complete {
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 70c8f60d34f2..1c08e913f526 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2453,9 +2453,20 @@  static u64 stmmac_xsk_fill_timestamp(void *_priv)
 	return 0;
 }
 
+static void stmmac_xsk_request_launch_time(u64 launch_time, void *_priv)
+{
+	struct stmmac_metadata_request *meta_req = _priv;
+	struct timespec64 ts = ns_to_timespec64(launch_time);
+
+	if (meta_req->tbs & STMMAC_TBS_EN)
+		stmmac_set_desc_tbs(meta_req->priv, meta_req->edesc, ts.tv_sec,
+				    ts.tv_nsec);
+}
+
 static const struct xsk_tx_metadata_ops stmmac_xsk_tx_metadata_ops = {
 	.tmo_request_timestamp		= stmmac_xsk_request_timestamp,
 	.tmo_fill_timestamp		= stmmac_xsk_fill_timestamp,
+	.tmo_request_launch_time	= stmmac_xsk_request_launch_time,
 };
 
 static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget)
@@ -2539,6 +2550,8 @@  static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget)
 		meta_req.priv = priv;
 		meta_req.tx_desc = tx_desc;
 		meta_req.set_ic = &set_ic;
+		meta_req.tbs = tx_q->tbs;
+		meta_req.edesc = &tx_q->dma_entx[entry];
 		xsk_tx_metadata_request(meta, &stmmac_xsk_tx_metadata_ops,
 					&meta_req);
 		if (set_ic) {