@@ -17,6 +17,15 @@ tristate "NXP SJA1105 Ethernet switch family support"
- SJA1105R (Gen. 2, SGMII, No TT-Ethernet)
- SJA1105S (Gen. 2, SGMII, TT-Ethernet)
+config NET_DSA_SJA1105_HOSTPRIO
+ int "Traffic class for management traffic"
+ range 0 7
+ default 7
+ depends on NET_DSA_SJA1105
+ help
+ Configure the traffic class which will be used for management
+ (link-local) traffic sent and received over switch ports.
+
config NET_DSA_SJA1105_PTP
bool "Support for the PTP clock on the NXP SJA1105 Ethernet switch"
depends on NET_DSA_SJA1105
@@ -388,7 +388,7 @@ static int sja1105_init_general_params(struct sja1105_private *priv)
/* Priority queue for link-local management frames
* (both ingress to and egress from CPU - PTP, STP etc)
*/
- .hostprio = 7,
+ .hostprio = CONFIG_NET_DSA_SJA1105_HOSTPRIO,
.mac_fltres1 = SJA1105_LINKLOCAL_FILTER_A,
.mac_flt1 = SJA1105_LINKLOCAL_FILTER_A_MASK,
.incl_srcpt1 = false,
Unfortunately with this hardware, there is no way to transmit in-band QoS hints with management frames (i.e. VLAN PCP is ignored). The traffic class for these is fixed in the static config (which in turn requires a reset to change). With the new ability to add time gates for individual traffic classes, there is a real danger that the user might unknowingly turn off the traffic class for PTP, BPDUs, LLDP etc. So we need to manage this situation the best we can. There isn't any knob in Linux for this, and changing it at runtime probably isn't worth it either. So just make the setting loud enough by promoting it to a Kconfig, which the user can customize to their particular setup. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> --- drivers/net/dsa/sja1105/Kconfig | 9 +++++++++ drivers/net/dsa/sja1105/sja1105_main.c | 2 +- 2 files changed, 10 insertions(+), 1 deletion(-)