Re: [PATCH 1/4] net: dsa: Extend the dsa_switch structure to hold info about HSR ports
From: Paolo Abeni <pabeni@redhat.com>
Date: 2023-08-31 09:10:56
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On Tue, 2023-08-29 at 14:11 +0200, Lukasz Majewski wrote:
quoted hunk ↗ jump to hunk
Information about HSR aware ports in a DSA switch can be helpful when one needs tags to be adjusted before the HSR frame is sent. For example - with ksz9477 switch - the TAG needs to be adjusted to have both HSR ports marked in tag to allow execution of HW based frame duplication. Signed-off-by: Lukasz Majewski <lukma@denx.de> --- include/net/dsa.h | 3 +++ 1 file changed, 3 insertions(+)diff --git a/include/net/dsa.h b/include/net/dsa.h index d309ee7ed04b..15274afc42bb 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h@@ -470,6 +470,9 @@ struct dsa_switch { /* Number of switch port queues */ unsigned int num_tx_queues; + /* Bitmask indicating ports supporting HSR */ + u16 hsr_ports; + /* Drivers that benefit from having an ID associated with each * offloaded LAG should set this to the maximum number of * supported IDs. DSA will then maintain a mapping of _at
Out of sheer ignorance, I think this new field does not belong to dsa_switch, at least not in this form. AFAICS there is no current hard limitation on the number of ports a DSA switch can handle at the API level, and this will introduce an hard one. I think you are better off keeping this field in the KSZ-specific struct. If you really want to keep it here you should remove the above limitation somehow (possibly a query op to check if a given port is HSR aware???) In any case this series looks like net-next material, does not apply correctly to net-next and net-next is currently closed. You can share a new version as RFC or wait for net-next to re-open in ~2w. Cheers, Paolo