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Message-Id: <03b2abc1fdfaf4bc4b3f3b710821b50fcbf14316.1574089391.git.rahul.lakkireddy@chelsio.com>
Date: Mon, 18 Nov 2019 22:30:19 +0530
From: Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, nirranjan@...lsio.com, vishal@...lsio.com,
dt@...lsio.com
Subject: [PATCH net-next v4 3/3] cxgb4: add TC-MATCHALL classifier ingress offload
Add TC-MATCHALL classifier ingress offload support. The same actions
supported by existing TC-FLOWER offload can be applied to all incoming
traffic on the underlying interface.
Ensure the rule priority doesn't conflict with existing rules in the
TCAM. Only 1 ingress matchall rule can be active at a time on the
underlying interface.
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
---
v4:
- Added check to ensure the matchall rule's prio doesn't conflict with
other rules in TCAM.
- Added logic to fill default mask for VIID, if none has been
provided, to prevent conflict with duplicate VIID rules.
- Used existing variables in private structure to fill VIID info,
instead of extracting the info manually.
v3:
- No change.
v2:
- Removed logic to fetch free index from end of TCAM. Must maintain
same ordering as in kernel.
.../net/ethernet/chelsio/cxgb4/cxgb4_filter.c | 6 +
.../net/ethernet/chelsio/cxgb4/cxgb4_main.c | 15 +-
.../ethernet/chelsio/cxgb4/cxgb4_tc_flower.c | 21 ++-
.../ethernet/chelsio/cxgb4/cxgb4_tc_flower.h | 6 +
.../chelsio/cxgb4/cxgb4_tc_matchall.c | 145 +++++++++++++++++-
.../chelsio/cxgb4/cxgb4_tc_matchall.h | 18 ++-
6 files changed, 192 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
index f19fd4efcd08..ed06a39da265 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c
@@ -871,6 +871,12 @@ static void fill_default_mask(struct ch_filter_specification *fs)
fs->mask.tos |= ~0;
if (fs->val.proto && !fs->mask.proto)
fs->mask.proto |= ~0;
+ if (fs->val.pfvf_vld && !fs->mask.pfvf_vld)
+ fs->mask.pfvf_vld |= ~0;
+ if (fs->val.pf && !fs->mask.pf)
+ fs->mask.pf |= ~0;
+ if (fs->val.vf && !fs->mask.vf)
+ fs->mask.vf |= ~0;
for (i = 0; i < ARRAY_SIZE(fs->val.lip); i++) {
lip |= fs->val.lip[i];
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index f04f9c858d52..e8a1826a1e90 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3236,7 +3236,8 @@ static int cxgb_setup_tc_cls_u32(struct net_device *dev,
}
static int cxgb_setup_tc_matchall(struct net_device *dev,
- struct tc_cls_matchall_offload *cls_matchall)
+ struct tc_cls_matchall_offload *cls_matchall,
+ bool ingress)
{
struct adapter *adap = netdev2adap(dev);
@@ -3245,9 +3246,13 @@ static int cxgb_setup_tc_matchall(struct net_device *dev,
switch (cls_matchall->command) {
case TC_CLSMATCHALL_REPLACE:
- return cxgb4_tc_matchall_replace(dev, cls_matchall);
+ return cxgb4_tc_matchall_replace(dev, cls_matchall, ingress);
case TC_CLSMATCHALL_DESTROY:
- return cxgb4_tc_matchall_destroy(dev, cls_matchall);
+ return cxgb4_tc_matchall_destroy(dev, cls_matchall, ingress);
+ case TC_CLSMATCHALL_STATS:
+ if (ingress)
+ return cxgb4_tc_matchall_stats(dev, cls_matchall);
+ break;
default:
break;
}
@@ -3277,6 +3282,8 @@ static int cxgb_setup_tc_block_ingress_cb(enum tc_setup_type type,
return cxgb_setup_tc_cls_u32(dev, type_data);
case TC_SETUP_CLSFLOWER:
return cxgb_setup_tc_flower(dev, type_data);
+ case TC_SETUP_CLSMATCHALL:
+ return cxgb_setup_tc_matchall(dev, type_data, true);
default:
return -EOPNOTSUPP;
}
@@ -3301,7 +3308,7 @@ static int cxgb_setup_tc_block_egress_cb(enum tc_setup_type type,
switch (type) {
case TC_SETUP_CLSMATCHALL:
- return cxgb_setup_tc_matchall(dev, type_data);
+ return cxgb_setup_tc_matchall(dev, type_data, false);
default:
break;
}
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
index 5179ad23be3c..0fa80bef575d 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
@@ -378,15 +378,14 @@ static void process_pedit_field(struct ch_filter_specification *fs, u32 val,
}
}
-static void cxgb4_process_flow_actions(struct net_device *in,
- struct flow_cls_offload *cls,
- struct ch_filter_specification *fs)
+void cxgb4_process_flow_actions(struct net_device *in,
+ struct flow_action *actions,
+ struct ch_filter_specification *fs)
{
- struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
struct flow_action_entry *act;
int i;
- flow_action_for_each(i, act, &rule->action) {
+ flow_action_for_each(i, act, actions) {
switch (act->id) {
case FLOW_ACTION_ACCEPT:
fs->action = FILTER_PASS;
@@ -544,17 +543,16 @@ static bool valid_pedit_action(struct net_device *dev,
return true;
}
-static int cxgb4_validate_flow_actions(struct net_device *dev,
- struct flow_cls_offload *cls)
+int cxgb4_validate_flow_actions(struct net_device *dev,
+ struct flow_action *actions)
{
- struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
struct flow_action_entry *act;
bool act_redir = false;
bool act_pedit = false;
bool act_vlan = false;
int i;
- flow_action_for_each(i, act, &rule->action) {
+ flow_action_for_each(i, act, actions) {
switch (act->id) {
case FLOW_ACTION_ACCEPT:
case FLOW_ACTION_DROP:
@@ -636,6 +634,7 @@ static int cxgb4_validate_flow_actions(struct net_device *dev,
int cxgb4_tc_flower_replace(struct net_device *dev,
struct flow_cls_offload *cls)
{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
struct netlink_ext_ack *extack = cls->common.extack;
struct adapter *adap = netdev2adap(dev);
struct ch_tc_flower_entry *ch_flower;
@@ -643,7 +642,7 @@ int cxgb4_tc_flower_replace(struct net_device *dev,
struct filter_ctx ctx;
int fidx, ret;
- if (cxgb4_validate_flow_actions(dev, cls))
+ if (cxgb4_validate_flow_actions(dev, &rule->action))
return -EOPNOTSUPP;
if (cxgb4_validate_flow_match(dev, cls))
@@ -658,7 +657,7 @@ int cxgb4_tc_flower_replace(struct net_device *dev,
fs = &ch_flower->fs;
fs->hitcnts = 1;
cxgb4_process_flow_match(dev, cls, fs);
- cxgb4_process_flow_actions(dev, cls, fs);
+ cxgb4_process_flow_actions(dev, &rule->action, fs);
fs->hash = is_filter_exact_match(adap, fs);
if (fs->hash) {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h
index eb4c95248baf..e132516e9868 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h
@@ -108,6 +108,12 @@ struct ch_tc_pedit_fields {
#define PEDIT_TCP_SPORT_DPORT 0x0
#define PEDIT_UDP_SPORT_DPORT 0x0
+void cxgb4_process_flow_actions(struct net_device *in,
+ struct flow_action *actions,
+ struct ch_filter_specification *fs);
+int cxgb4_validate_flow_actions(struct net_device *dev,
+ struct flow_action *actions);
+
int cxgb4_tc_flower_replace(struct net_device *dev,
struct flow_cls_offload *cls);
int cxgb4_tc_flower_destroy(struct net_device *dev,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
index 85bf0a238a49..102b370fbd3e 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c
@@ -4,6 +4,9 @@
#include "cxgb4.h"
#include "cxgb4_tc_matchall.h"
#include "sched.h"
+#include "cxgb4_uld.h"
+#include "cxgb4_filter.h"
+#include "cxgb4_tc_flower.h"
static int cxgb4_matchall_egress_validate(struct net_device *dev,
struct tc_cls_matchall_offload *cls)
@@ -118,8 +121,85 @@ static void cxgb4_matchall_free_tc(struct net_device *dev)
tc_port_matchall->egress.state = CXGB4_MATCHALL_STATE_DISABLED;
}
+static int cxgb4_matchall_alloc_filter(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls)
+{
+ struct netlink_ext_ack *extack = cls->common.extack;
+ struct cxgb4_tc_port_matchall *tc_port_matchall;
+ struct port_info *pi = netdev2pinfo(dev);
+ struct adapter *adap = netdev2adap(dev);
+ struct ch_filter_specification *fs;
+ int ret, fidx;
+
+ /* Note that TC uses prio 0 to indicate stack to generate
+ * automatic prio and hence doesn't pass prio 0 to driver.
+ * However, the hardware TCAM index starts from 0. Hence, the
+ * -1 here. 1 slot is enough to create a wildcard matchall
+ * VIID rule.
+ */
+ if (cls->common.prio <= adap->tids.nftids)
+ fidx = cls->common.prio - 1;
+ else
+ fidx = cxgb4_get_free_ftid(dev, PF_INET);
+
+ /* Only insert MATCHALL rule if its priority doesn't conflict
+ * with existing rules in the LETCAM.
+ */
+ if (fidx < 0 ||
+ !cxgb4_filter_prio_in_range(dev, fidx, cls->common.prio)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "No free LETCAM index available");
+ return -ENOMEM;
+ }
+
+ tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
+ fs = &tc_port_matchall->ingress.fs;
+ memset(fs, 0, sizeof(*fs));
+
+ fs->tc_prio = cls->common.prio;
+ fs->tc_cookie = cls->cookie;
+ fs->hitcnts = 1;
+
+ fs->val.pfvf_vld = 1;
+ fs->val.pf = adap->pf;
+ fs->val.vf = pi->vin;
+
+ cxgb4_process_flow_actions(dev, &cls->rule->action, fs);
+
+ ret = cxgb4_set_filter(dev, fidx, fs);
+ if (ret)
+ return ret;
+
+ tc_port_matchall->ingress.tid = fidx;
+ tc_port_matchall->ingress.state = CXGB4_MATCHALL_STATE_ENABLED;
+ return 0;
+}
+
+static int cxgb4_matchall_free_filter(struct net_device *dev)
+{
+ struct cxgb4_tc_port_matchall *tc_port_matchall;
+ struct port_info *pi = netdev2pinfo(dev);
+ struct adapter *adap = netdev2adap(dev);
+ int ret;
+
+ tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
+
+ ret = cxgb4_del_filter(dev, tc_port_matchall->ingress.tid,
+ &tc_port_matchall->ingress.fs);
+ if (ret)
+ return ret;
+
+ tc_port_matchall->ingress.packets = 0;
+ tc_port_matchall->ingress.bytes = 0;
+ tc_port_matchall->ingress.last_used = 0;
+ tc_port_matchall->ingress.tid = 0;
+ tc_port_matchall->ingress.state = CXGB4_MATCHALL_STATE_DISABLED;
+ return 0;
+}
+
int cxgb4_tc_matchall_replace(struct net_device *dev,
- struct tc_cls_matchall_offload *cls_matchall)
+ struct tc_cls_matchall_offload *cls_matchall,
+ bool ingress)
{
struct netlink_ext_ack *extack = cls_matchall->common.extack;
struct cxgb4_tc_port_matchall *tc_port_matchall;
@@ -128,6 +208,22 @@ int cxgb4_tc_matchall_replace(struct net_device *dev,
int ret;
tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
+ if (ingress) {
+ if (tc_port_matchall->ingress.state ==
+ CXGB4_MATCHALL_STATE_ENABLED) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Only 1 Ingress MATCHALL can be offloaded");
+ return -ENOMEM;
+ }
+
+ ret = cxgb4_validate_flow_actions(dev,
+ &cls_matchall->rule->action);
+ if (ret)
+ return ret;
+
+ return cxgb4_matchall_alloc_filter(dev, cls_matchall);
+ }
+
if (tc_port_matchall->egress.state == CXGB4_MATCHALL_STATE_ENABLED) {
NL_SET_ERR_MSG_MOD(extack,
"Only 1 Egress MATCHALL can be offloaded");
@@ -142,13 +238,22 @@ int cxgb4_tc_matchall_replace(struct net_device *dev,
}
int cxgb4_tc_matchall_destroy(struct net_device *dev,
- struct tc_cls_matchall_offload *cls_matchall)
+ struct tc_cls_matchall_offload *cls_matchall,
+ bool ingress)
{
struct cxgb4_tc_port_matchall *tc_port_matchall;
struct port_info *pi = netdev2pinfo(dev);
struct adapter *adap = netdev2adap(dev);
tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
+ if (ingress) {
+ if (cls_matchall->cookie !=
+ tc_port_matchall->ingress.fs.tc_cookie)
+ return -ENOENT;
+
+ return cxgb4_matchall_free_filter(dev);
+ }
+
if (cls_matchall->cookie != tc_port_matchall->egress.cookie)
return -ENOENT;
@@ -156,6 +261,39 @@ int cxgb4_tc_matchall_destroy(struct net_device *dev,
return 0;
}
+int cxgb4_tc_matchall_stats(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls_matchall)
+{
+ struct cxgb4_tc_port_matchall *tc_port_matchall;
+ struct port_info *pi = netdev2pinfo(dev);
+ struct adapter *adap = netdev2adap(dev);
+ u64 packets, bytes;
+ int ret;
+
+ tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
+ if (tc_port_matchall->ingress.state == CXGB4_MATCHALL_STATE_DISABLED)
+ return -ENOENT;
+
+ ret = cxgb4_get_filter_counters(dev, tc_port_matchall->ingress.tid,
+ &packets, &bytes,
+ tc_port_matchall->ingress.fs.hash);
+ if (ret)
+ return ret;
+
+ if (tc_port_matchall->ingress.packets != packets) {
+ flow_stats_update(&cls_matchall->stats,
+ bytes - tc_port_matchall->ingress.bytes,
+ packets - tc_port_matchall->ingress.packets,
+ tc_port_matchall->ingress.last_used);
+
+ tc_port_matchall->ingress.packets = packets;
+ tc_port_matchall->ingress.bytes = bytes;
+ tc_port_matchall->ingress.last_used = jiffies;
+ }
+
+ return 0;
+}
+
static void cxgb4_matchall_disable_offload(struct net_device *dev)
{
struct cxgb4_tc_port_matchall *tc_port_matchall;
@@ -165,6 +303,9 @@ static void cxgb4_matchall_disable_offload(struct net_device *dev)
tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id];
if (tc_port_matchall->egress.state == CXGB4_MATCHALL_STATE_ENABLED)
cxgb4_matchall_free_tc(dev);
+
+ if (tc_port_matchall->ingress.state == CXGB4_MATCHALL_STATE_ENABLED)
+ cxgb4_matchall_free_filter(dev);
}
int cxgb4_init_tc_matchall(struct adapter *adap)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h
index ce5b0800f0d8..ab6b5683dfd3 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.h
@@ -17,8 +17,18 @@ struct cxgb4_matchall_egress_entry {
u64 cookie; /* Used to identify the MATCHALL rule offloaded */
};
+struct cxgb4_matchall_ingress_entry {
+ enum cxgb4_matchall_state state; /* Current MATCHALL offload state */
+ u32 tid; /* Index to hardware filter entry */
+ struct ch_filter_specification fs; /* Filter entry */
+ u64 bytes; /* # of bytes hitting the filter */
+ u64 packets; /* # of packets hitting the filter */
+ u64 last_used; /* Last updated jiffies time */
+};
+
struct cxgb4_tc_port_matchall {
struct cxgb4_matchall_egress_entry egress; /* Egress offload info */
+ struct cxgb4_matchall_ingress_entry ingress; /* Ingress offload info */
};
struct cxgb4_tc_matchall {
@@ -26,9 +36,13 @@ struct cxgb4_tc_matchall {
};
int cxgb4_tc_matchall_replace(struct net_device *dev,
- struct tc_cls_matchall_offload *cls_matchall);
+ struct tc_cls_matchall_offload *cls_matchall,
+ bool ingress);
int cxgb4_tc_matchall_destroy(struct net_device *dev,
- struct tc_cls_matchall_offload *cls_matchall);
+ struct tc_cls_matchall_offload *cls_matchall,
+ bool ingress);
+int cxgb4_tc_matchall_stats(struct net_device *dev,
+ struct tc_cls_matchall_offload *cls_matchall);
int cxgb4_init_tc_matchall(struct adapter *adap);
void cxgb4_cleanup_tc_matchall(struct adapter *adap);
--
2.24.0
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