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net: mscc: ocelot: calculate vcap offsets correctly for full and quarter entries 

When calculating the offsets for the current entry within the row and
placing them inside struct vcap_data, the function assumes half key
entry (2 keys per row).

This patch modifies the vcap_data_offset_get() function to calculate a
correct data offset when the setting VCAP Type-Group of a key to
VCAP_TG_FULL or VCAP_TG_QUARTER.

This is needed because, for example, VCAP ES0 only supports full keys.

Also rename the 'count' variable to 'num_entries_per_row' to make the
function just one tiny bit easier to follow.

Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xiaoliang Yang 2020-09-30 01:27:29 +03:00 committed by David S. Miller
parent 7a155fa3d8
commit e6ae7c506f
1 changed files with 15 additions and 2 deletions
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17
drivers/net/ethernet/mscc/ocelot_vcap.c
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@ -177,8 +177,21 @@ static void vcap_data_offset_get(const struct vcap_props *vcap,
int i, col, offset, count, cnt, base;
u32 width = vcap->tg_width;
count = (data->tg_sw == VCAP_TG_HALF ? 2 : 4);
col = (ix % 2);
switch (data->tg_sw) {
case VCAP_TG_FULL:
count = 1;
break;
case VCAP_TG_HALF:
count = 2;
break;
case VCAP_TG_QUARTER:
count = 4;
break;
default:
return;
}
col = (ix % count);
cnt = (vcap->sw_count / count);
base = (vcap->sw_count - col * cnt - cnt);
data->tg_value = 0;