diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2022-05-05 02:55:00 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-05-05 19:15:15 -0700 |
| commit | 16bbebd35629c93a8c68c6d8d28557e100bcee73 (patch) | |
| tree | 8d6f3be3727dad1af8e46c81e4e7900e6d85a8da /drivers/net/ethernet/mscc/ocelot_vcap.c | |
| parent | e1846cff2fe614d93a2f89461b5935678fd34bd9 (diff) | |
net: mscc: ocelot: fix last VCAP IS1/IS2 filter persisting in hardware when deleted
ocelot_vcap_filter_del() works by moving the next filters over the
current one, and then deleting the last filter by calling vcap_entry_set()
with a del_filter which was specially created by memsetting its memory
to zeroes. vcap_entry_set() then programs this to the TCAM and action
RAM via the cache registers.
The problem is that vcap_entry_set() is a dispatch function which looks
at del_filter->block_id. But since del_filter is zeroized memory, the
block_id is 0, or otherwise said, VCAP_ES0. So practically, what we do
is delete the entry at the same TCAM index from VCAP ES0 instead of IS1
or IS2.
The code was not always like this. vcap_entry_set() used to simply be
is2_entry_set(), and then, the logic used to work.
Restore the functionality by populating the block_id of the del_filter
based on the VCAP block of the filter that we're deleting. This makes
vcap_entry_set() know what to do.
Fixes: 1397a2eb52e2 ("net: mscc: ocelot: create TCAM skeleton from tc filter chains")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/mscc/ocelot_vcap.c')
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_vcap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.c b/drivers/net/ethernet/mscc/ocelot_vcap.c index c8701ac955a8..2749df593ebc 100644 --- a/drivers/net/ethernet/mscc/ocelot_vcap.c +++ b/drivers/net/ethernet/mscc/ocelot_vcap.c @@ -1250,7 +1250,11 @@ int ocelot_vcap_filter_del(struct ocelot *ocelot, struct ocelot_vcap_filter del_filter; int i, index; + /* Need to inherit the block_id so that vcap_entry_set() + * does not get confused and knows where to install it. + */ memset(&del_filter, 0, sizeof(del_filter)); + del_filter.block_id = filter->block_id; /* Gets index of the filter */ index = ocelot_vcap_block_get_filter_index(block, filter); |