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net: lan966x: Add TC filter chaining support for IS1 and IS2 VCAPs

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Allow rules to be chained between IS1 VCAP and IS2 VCAP. Chaining
between IS1 lookups or between IS2 lookups are not supported by the
hardware.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Horatiu Vultur 2023-03-07 23:09:28 +01:00 committed by Jakub Kicinski
parent 135c2116fd
commit b3762a9db3
1 changed files with 80 additions and 0 deletions
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80
drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c
View file

@ -309,6 +309,75 @@ static int lan966x_tc_set_actionset(struct vcap_admin *admin,
return err;
}
static int lan966x_tc_add_rule_link_target(struct vcap_admin *admin,
struct vcap_rule *vrule,
int target_cid)
{
int link_val = target_cid % VCAP_CID_LOOKUP_SIZE;
int err;
if (!link_val)
return 0;
switch (admin->vtype) {
case VCAP_TYPE_IS1:
/* Choose IS1 specific NXT_IDX key (for chaining rules from IS1) */
err = vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_GEN_IDX_SEL,
1, ~0);
if (err)
return err;
return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_GEN_IDX,
link_val, ~0);
case VCAP_TYPE_IS2:
/* Add IS2 specific PAG key (for chaining rules from IS1) */
return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_PAG,
link_val, ~0);
default:
break;
}
return 0;
}
static int lan966x_tc_add_rule_link(struct vcap_control *vctrl,
struct vcap_admin *admin,
struct vcap_rule *vrule,
struct flow_cls_offload *f,
int to_cid)
{
struct vcap_admin *to_admin = vcap_find_admin(vctrl, to_cid);
int diff, err = 0;
if (!to_admin) {
NL_SET_ERR_MSG_MOD(f->common.extack,
"Unknown destination chain");
return -EINVAL;
}
diff = vcap_chain_offset(vctrl, f->common.chain_index, to_cid);
if (!diff)
return 0;
/* Between IS1 and IS2 the PAG value is used */
if (admin->vtype == VCAP_TYPE_IS1 && to_admin->vtype == VCAP_TYPE_IS2) {
/* This works for IS1->IS2 */
err = vcap_rule_add_action_u32(vrule, VCAP_AF_PAG_VAL, diff);
if (err)
return err;
err = vcap_rule_add_action_u32(vrule, VCAP_AF_PAG_OVERRIDE_MASK,
0xff);
if (err)
return err;
} else {
NL_SET_ERR_MSG_MOD(f->common.extack,
"Unsupported chain destination");
return -EOPNOTSUPP;
}
return err;
}
static int lan966x_tc_flower_add(struct lan966x_port *port,
struct flow_cls_offload *f,
struct vcap_admin *admin,
@ -336,6 +405,11 @@ static int lan966x_tc_flower_add(struct lan966x_port *port,
if (err)
goto out;
err = lan966x_tc_add_rule_link_target(admin, vrule,
f->common.chain_index);
if (err)
goto out;
frule = flow_cls_offload_flow_rule(f);
flow_action_for_each(idx, act, &frule->action) {
@ -365,6 +439,12 @@ static int lan966x_tc_flower_add(struct lan966x_port *port,
if (err)
goto out;
err = lan966x_tc_add_rule_link(port->lan966x->vcap_ctrl,
admin, vrule,
f, act->chain_index);
if (err)
goto out;
break;
default:
NL_SET_ERR_MSG_MOD(f->common.extack,