[[RFC xdp-hints] 12/16] ethtool,igc: Add "xdp_headroom" driver info
From: Ederson de Souza <hidden>
Date: 2021-08-03 01:03:55
Subsystem:
intel ethernet drivers, networking drivers, networking [ethtool], networking [general], the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This information can be used by user space applications to determine how much headroom is needed for the XDP frame. igc driver is also changed to add this new information. Signed-off-by: Ederson de Souza <redacted> --- drivers/net/ethernet/intel/igc/igc_ethtool.c | 2 ++ include/uapi/linux/ethtool.h | 3 +++ 2 files changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c
index d3e84416248e..7cfd4eb59234 100644
--- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
+++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c@@ -8,6 +8,7 @@ #include "igc.h" #include "igc_diag.h" +#include "igc_xdp.h" /* forward declaration */ struct igc_stats {
@@ -156,6 +157,7 @@ static void igc_ethtool_get_drvinfo(struct net_device *netdev, sizeof(drvinfo->bus_info)); drvinfo->n_priv_flags = IGC_PRIV_FLAGS_STR_LEN; + drvinfo->xdp_headroom = XDP_PACKET_HEADROOM; } static int igc_ethtool_get_regs_len(struct net_device *netdev)
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 67aa7134b301..dcf14ad4dccd 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h@@ -176,6 +176,8 @@ static inline __u32 ethtool_cmd_speed(const struct ethtool_cmd *ep) * and %ETHTOOL_SEEPROM commands, in bytes * @regdump_len: Size of register dump returned by the %ETHTOOL_GREGS * command, in bytes + * @xdp_headroom: Size of minimum XDP headroom needed by the driver + * to fill with metadata information. * * Users can use the %ETHTOOL_GSSET_INFO command to get the number of * strings in any string set (from Linux 2.6.34).
@@ -197,6 +199,7 @@ struct ethtool_drvinfo { __u32 testinfo_len; __u32 eedump_len; __u32 regdump_len; + __u32 xdp_headroom; }; #define SOPASS_MAX 6
--
2.32.0