[PATCH net-next 6/9] net: lan966x: add tc flower support for VCAP API
Horatiu Vultur
horatiu.vultur at microchip.com
Fri Nov 25 01:50:07 PST 2022
Currently the only supported action is ACTION_TRAP and the only
dissector is ETH_ADDRS. Others will be added in future patches.
Signed-off-by: Horatiu Vultur <horatiu.vultur at microchip.com>
---
.../net/ethernet/microchip/lan966x/Makefile | 3 +-
.../ethernet/microchip/lan966x/lan966x_main.h | 3 +
.../ethernet/microchip/lan966x/lan966x_tc.c | 2 +
.../microchip/lan966x/lan966x_tc_flower.c | 262 ++++++++++++++++++
.../microchip/lan966x/lan966x_vcap_impl.c | 152 ++++++++++
5 files changed, 421 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c
diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile
index 053a174f09f32..23781149f7a9b 100644
--- a/drivers/net/ethernet/microchip/lan966x/Makefile
+++ b/drivers/net/ethernet/microchip/lan966x/Makefile
@@ -12,7 +12,8 @@ lan966x-switch-objs := lan966x_main.o lan966x_phylink.o lan966x_port.o \
lan966x_tc.o lan966x_mqprio.o lan966x_taprio.o \
lan966x_tbf.o lan966x_cbs.o lan966x_ets.o \
lan966x_tc_matchall.o lan966x_police.o lan966x_mirror.o \
- lan966x_xdp.o lan966x_vcap_impl.o lan966x_vcap_ag_api.o
+ lan966x_xdp.o lan966x_vcap_impl.o lan966x_vcap_ag_api.o \
+ lan966x_tc_flower.o
# Provide include files
ccflags-y += -I$(srctree)/drivers/net/ethernet/microchip/vcap
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index eecb1a2bf9a72..0820b96b75ab1 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -566,6 +566,9 @@ static inline bool lan966x_xdp_port_present(struct lan966x_port *port)
int lan966x_vcap_init(struct lan966x *lan966x);
void lan966x_vcap_deinit(struct lan966x *lan966x);
+int lan966x_tc_flower(struct lan966x_port *port,
+ struct flow_cls_offload *f);
+
static inline void __iomem *lan_addr(void __iomem *base[],
int id, int tinst, int tcnt,
int gbase, int ginst,
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c b/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c
index 651d5493ae55b..01072121c999e 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_tc.c
@@ -69,6 +69,8 @@ static int lan966x_tc_block_cb(enum tc_setup_type type, void *type_data,
switch (type) {
case TC_SETUP_CLSMATCHALL:
return lan966x_tc_matchall(port, type_data, ingress);
+ case TC_SETUP_CLSFLOWER:
+ return lan966x_tc_flower(port, type_data);
default:
return -EOPNOTSUPP;
}
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c b/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c
new file mode 100644
index 0000000000000..04a2afd683cca
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lan966x_main.h"
+#include "vcap_api.h"
+#include "vcap_api_client.h"
+
+/* Controls how PORT_MASK is applied */
+enum LAN966X_PORT_MASK_MODE {
+ LAN966X_PMM_NO_ACTION,
+ LAN966X_PMM_REPLACE,
+ LAN966X_PMM_FORWARDING,
+ LAN966X_PMM_REDIRECT,
+};
+
+struct lan966x_tc_flower_parse_usage {
+ struct flow_cls_offload *f;
+ struct flow_rule *frule;
+ struct vcap_rule *vrule;
+ unsigned int used_keys;
+ u16 l3_proto;
+};
+
+static int lan966x_tc_flower_handler_ethaddr_usage(struct lan966x_tc_flower_parse_usage *st)
+{
+ enum vcap_key_field smac_key = VCAP_KF_L2_SMAC;
+ enum vcap_key_field dmac_key = VCAP_KF_L2_DMAC;
+ struct flow_match_eth_addrs match;
+ struct vcap_u48_key smac, dmac;
+ int err = 0;
+
+ flow_rule_match_eth_addrs(st->frule, &match);
+
+ if (!is_zero_ether_addr(match.mask->src)) {
+ vcap_netbytes_copy(smac.value, match.key->src, ETH_ALEN);
+ vcap_netbytes_copy(smac.mask, match.mask->src, ETH_ALEN);
+ err = vcap_rule_add_key_u48(st->vrule, smac_key, &smac);
+ if (err)
+ goto out;
+ }
+
+ if (!is_zero_ether_addr(match.mask->dst)) {
+ vcap_netbytes_copy(dmac.value, match.key->dst, ETH_ALEN);
+ vcap_netbytes_copy(dmac.mask, match.mask->dst, ETH_ALEN);
+ err = vcap_rule_add_key_u48(st->vrule, dmac_key, &dmac);
+ if (err)
+ goto out;
+ }
+
+ st->used_keys |= BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
+
+ return err;
+
+out:
+ NL_SET_ERR_MSG_MOD(st->f->common.extack, "eth_addr parse error");
+ return err;
+}
+
+static int
+(*lan966x_tc_flower_handlers_usage[])(struct lan966x_tc_flower_parse_usage *st) = {
+ [FLOW_DISSECTOR_KEY_ETH_ADDRS] = lan966x_tc_flower_handler_ethaddr_usage,
+};
+
+static int lan966x_tc_flower_use_dissectors(struct flow_cls_offload *f,
+ struct vcap_admin *admin,
+ struct vcap_rule *vrule,
+ u16 *l3_proto)
+{
+ struct lan966x_tc_flower_parse_usage state = {
+ .f = f,
+ .vrule = vrule,
+ .l3_proto = ETH_P_ALL,
+ };
+ int err = 0;
+
+ state.frule = flow_cls_offload_flow_rule(f);
+ for (int i = 0; i < ARRAY_SIZE(lan966x_tc_flower_handlers_usage); ++i) {
+ if (!flow_rule_match_key(state.frule, i) ||
+ !lan966x_tc_flower_handlers_usage[i])
+ continue;
+
+ err = lan966x_tc_flower_handlers_usage[i](&state);
+ if (err)
+ return err;
+ }
+
+ if (l3_proto)
+ *l3_proto = state.l3_proto;
+
+ return err;
+}
+
+static int lan966x_tc_flower_action_check(struct vcap_control *vctrl,
+ struct flow_cls_offload *fco,
+ struct vcap_admin *admin)
+{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(fco);
+ struct flow_action_entry *actent, *last_actent = NULL;
+ struct flow_action *act = &rule->action;
+ u64 action_mask = 0;
+ int idx;
+
+ if (!flow_action_has_entries(act)) {
+ NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions");
+ return -EINVAL;
+ }
+
+ if (!flow_action_basic_hw_stats_check(act, fco->common.extack))
+ return -EOPNOTSUPP;
+
+ flow_action_for_each(idx, actent, act) {
+ if (action_mask & BIT(actent->id)) {
+ NL_SET_ERR_MSG_MOD(fco->common.extack,
+ "More actions of the same type");
+ return -EINVAL;
+ }
+ action_mask |= BIT(actent->id);
+ last_actent = actent; /* Save last action for later check */
+ }
+
+ /* Check that last action is a goto */
+ if (last_actent->id != FLOW_ACTION_GOTO) {
+ NL_SET_ERR_MSG_MOD(fco->common.extack,
+ "Last action must be 'goto'");
+ return -EINVAL;
+ }
+
+ /* Check if the goto chain is in the next lookup */
+ if (!vcap_is_next_lookup(vctrl, fco->common.chain_index,
+ last_actent->chain_index)) {
+ NL_SET_ERR_MSG_MOD(fco->common.extack,
+ "Invalid goto chain");
+ return -EINVAL;
+ }
+
+ /* Catch unsupported combinations of actions */
+ if (action_mask & BIT(FLOW_ACTION_TRAP) &&
+ action_mask & BIT(FLOW_ACTION_ACCEPT)) {
+ NL_SET_ERR_MSG_MOD(fco->common.extack,
+ "Cannot combine pass and trap action");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int lan966x_tc_flower_add(struct lan966x_port *port,
+ struct flow_cls_offload *f,
+ struct vcap_admin *admin)
+{
+ struct flow_action_entry *act;
+ u16 l3_proto = ETH_P_ALL;
+ struct flow_rule *frule;
+ struct vcap_rule *vrule;
+ int err, idx;
+
+ err = lan966x_tc_flower_action_check(port->lan966x->vcap_ctrl, f,
+ admin);
+ if (err)
+ return err;
+
+ vrule = vcap_alloc_rule(port->lan966x->vcap_ctrl, port->dev,
+ f->common.chain_index, VCAP_USER_TC,
+ f->common.prio, 0);
+ if (IS_ERR(vrule))
+ return PTR_ERR(vrule);
+
+ vrule->cookie = f->cookie;
+ err = lan966x_tc_flower_use_dissectors(f, admin, vrule, &l3_proto);
+ if (err)
+ goto out;
+
+ frule = flow_cls_offload_flow_rule(f);
+
+ flow_action_for_each(idx, act, &frule->action) {
+ switch (act->id) {
+ case FLOW_ACTION_TRAP:
+ err = vcap_rule_add_action_bit(vrule,
+ VCAP_AF_CPU_COPY_ENA,
+ VCAP_BIT_1);
+ err |= vcap_rule_add_action_u32(vrule,
+ VCAP_AF_CPU_QUEUE_NUM,
+ 0);
+ err |= vcap_rule_add_action_u32(vrule, VCAP_AF_MASK_MODE,
+ LAN966X_PMM_REPLACE);
+ err |= vcap_set_rule_set_actionset(vrule,
+ VCAP_AFS_BASE_TYPE);
+ if (err)
+ goto out;
+
+ break;
+ case FLOW_ACTION_GOTO:
+ break;
+ default:
+ NL_SET_ERR_MSG_MOD(f->common.extack,
+ "Unsupported TC action");
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+ }
+
+ err = vcap_val_rule(vrule, l3_proto);
+ if (err) {
+ vcap_set_tc_exterr(f, vrule);
+ goto out;
+ }
+
+ err = vcap_add_rule(vrule);
+ if (err)
+ NL_SET_ERR_MSG_MOD(f->common.extack,
+ "Could not add the filter");
+out:
+ vcap_free_rule(vrule);
+ return err;
+}
+
+static int lan966x_tc_flower_del(struct lan966x_port *port,
+ struct flow_cls_offload *f,
+ struct vcap_admin *admin)
+{
+ struct vcap_control *vctrl;
+ int err = -ENOENT, rule_id;
+
+ vctrl = port->lan966x->vcap_ctrl;
+ while (true) {
+ rule_id = vcap_lookup_rule_by_cookie(vctrl, f->cookie);
+ if (rule_id <= 0)
+ break;
+
+ err = vcap_del_rule(vctrl, port->dev, rule_id);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(f->common.extack,
+ "Cannot delete rule");
+ break;
+ }
+ }
+
+ return err;
+}
+
+int lan966x_tc_flower(struct lan966x_port *port,
+ struct flow_cls_offload *f)
+{
+ struct vcap_admin *admin;
+
+ admin = vcap_find_admin(port->lan966x->vcap_ctrl,
+ f->common.chain_index);
+ if (!admin) {
+ NL_SET_ERR_MSG_MOD(f->common.extack, "Invalid chain");
+ return -EINVAL;
+ }
+
+ switch (f->command) {
+ case FLOW_CLS_REPLACE:
+ return lan966x_tc_flower_add(port, f, admin);
+ case FLOW_CLS_DESTROY:
+ return lan966x_tc_flower_del(port, f, admin);
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c b/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c
index aac821cd611e8..08253dd4a306f 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c
@@ -3,10 +3,143 @@
#include "lan966x_main.h"
#include "lan966x_vcap_ag_api.h"
#include "vcap_api.h"
+#include "vcap_api_client.h"
+
+#define LAN966X_VCAP_CID_IS2_L0 VCAP_CID_INGRESS_STAGE2_L0 /* IS2 lookup 0 */
+#define LAN966X_VCAP_CID_IS2_L1 VCAP_CID_INGRESS_STAGE2_L1 /* IS2 lookup 1 */
+#define LAN966X_VCAP_CID_IS2_MAX (VCAP_CID_INGRESS_STAGE2_L2 - 1) /* IS2 Max */
+
+#define STREAMSIZE (64 * 4)
+
+#define LAN966X_IS2_LOOKUPS 2
+
+static struct lan966x_vcap_inst {
+ enum vcap_type vtype; /* type of vcap */
+ int tgt_inst; /* hardware instance number */
+ int lookups; /* number of lookups in this vcap type */
+ int first_cid; /* first chain id in this vcap */
+ int last_cid; /* last chain id in this vcap */
+ int count; /* number of available addresses */
+} lan966x_vcap_inst_cfg[] = {
+ {
+ .vtype = VCAP_TYPE_IS2, /* IS2-0 */
+ .tgt_inst = 2,
+ .lookups = LAN966X_IS2_LOOKUPS,
+ .first_cid = LAN966X_VCAP_CID_IS2_L0,
+ .last_cid = LAN966X_VCAP_CID_IS2_MAX,
+ .count = 256,
+ },
+};
+
+struct lan966x_vcap_cmd_cb {
+ struct lan966x *lan966x;
+ u32 instance;
+};
+
+static u32 lan966x_vcap_read_update_ctrl(const struct lan966x_vcap_cmd_cb *cb)
+{
+ return lan_rd(cb->lan966x, VCAP_UPDATE_CTRL(cb->instance));
+}
+
+static void lan966x_vcap_wait_update(struct lan966x *lan966x, int instance)
+{
+ const struct lan966x_vcap_cmd_cb cb = { .lan966x = lan966x,
+ .instance = instance };
+ u32 val;
+
+ readx_poll_timeout(lan966x_vcap_read_update_ctrl, &cb, val,
+ (val & VCAP_UPDATE_CTRL_UPDATE_SHOT) == 0, 10,
+ 100000);
+}
+
+static void __lan966x_vcap_range_init(struct lan966x *lan966x,
+ struct vcap_admin *admin,
+ u32 addr,
+ u32 count)
+{
+ lan_wr(VCAP_MV_CFG_MV_NUM_POS_SET(0) |
+ VCAP_MV_CFG_MV_SIZE_SET(count - 1),
+ lan966x, VCAP_MV_CFG(admin->tgt_inst));
+
+ lan_wr(VCAP_UPDATE_CTRL_UPDATE_CMD_SET(VCAP_CMD_INITIALIZE) |
+ VCAP_UPDATE_CTRL_UPDATE_ENTRY_DIS_SET(0) |
+ VCAP_UPDATE_CTRL_UPDATE_ACTION_DIS_SET(0) |
+ VCAP_UPDATE_CTRL_UPDATE_CNT_DIS_SET(0) |
+ VCAP_UPDATE_CTRL_UPDATE_ADDR_SET(addr) |
+ VCAP_UPDATE_CTRL_CLEAR_CACHE_SET(true) |
+ VCAP_UPDATE_CTRL_UPDATE_SHOT_SET(1),
+ lan966x, VCAP_UPDATE_CTRL(admin->tgt_inst));
+
+ lan966x_vcap_wait_update(lan966x, admin->tgt_inst);
+}
+
+static void lan966x_vcap_admin_free(struct vcap_admin *admin)
+{
+ if (!admin)
+ return;
+
+ kfree(admin->cache.keystream);
+ kfree(admin->cache.maskstream);
+ kfree(admin->cache.actionstream);
+ mutex_destroy(&admin->lock);
+ kfree(admin);
+}
+
+static struct vcap_admin *
+lan966x_vcap_admin_alloc(struct lan966x *lan966x, struct vcap_control *ctrl,
+ const struct lan966x_vcap_inst *cfg)
+{
+ struct vcap_admin *admin;
+
+ admin = kzalloc(sizeof(*admin), GFP_KERNEL);
+ if (!admin)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&admin->lock);
+ INIT_LIST_HEAD(&admin->list);
+ INIT_LIST_HEAD(&admin->rules);
+ admin->vtype = cfg->vtype;
+ admin->vinst = 0;
+ admin->lookups = cfg->lookups;
+ admin->lookups_per_instance = cfg->lookups;
+ admin->first_cid = cfg->first_cid;
+ admin->last_cid = cfg->last_cid;
+ admin->cache.keystream = kzalloc(STREAMSIZE, GFP_KERNEL);
+ admin->cache.maskstream = kzalloc(STREAMSIZE, GFP_KERNEL);
+ admin->cache.actionstream = kzalloc(STREAMSIZE, GFP_KERNEL);
+ if (!admin->cache.keystream ||
+ !admin->cache.maskstream ||
+ !admin->cache.actionstream) {
+ lan966x_vcap_admin_free(admin);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return admin;
+}
+
+static void lan966x_vcap_block_init(struct lan966x *lan966x,
+ struct vcap_admin *admin,
+ struct lan966x_vcap_inst *cfg)
+{
+ admin->first_valid_addr = 0;
+ admin->last_used_addr = cfg->count;
+ admin->last_valid_addr = cfg->count - 1;
+
+ lan_wr(VCAP_CORE_IDX_CORE_IDX_SET(0),
+ lan966x, VCAP_CORE_IDX(admin->tgt_inst));
+ lan_wr(VCAP_CORE_MAP_CORE_MAP_SET(1),
+ lan966x, VCAP_CORE_MAP(admin->tgt_inst));
+
+ __lan966x_vcap_range_init(lan966x, admin, admin->first_valid_addr,
+ admin->last_valid_addr -
+ admin->first_valid_addr);
+}
int lan966x_vcap_init(struct lan966x *lan966x)
{
+ struct lan966x_vcap_inst *cfg;
struct vcap_control *ctrl;
+ struct vcap_admin *admin;
ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
@@ -15,6 +148,18 @@ int lan966x_vcap_init(struct lan966x *lan966x)
ctrl->vcaps = lan966x_vcaps;
ctrl->stats = &lan966x_vcap_stats;
+ INIT_LIST_HEAD(&ctrl->list);
+ for (int i = 0; i < ARRAY_SIZE(lan966x_vcap_inst_cfg); ++i) {
+ cfg = &lan966x_vcap_inst_cfg[i];
+
+ admin = lan966x_vcap_admin_alloc(lan966x, ctrl, cfg);
+ if (IS_ERR(admin))
+ return PTR_ERR(admin);
+
+ lan966x_vcap_block_init(lan966x, admin, cfg);
+ list_add_tail(&admin->list, &ctrl->list);
+ }
+
lan966x->vcap_ctrl = ctrl;
return 0;
@@ -22,11 +167,18 @@ int lan966x_vcap_init(struct lan966x *lan966x)
void lan966x_vcap_deinit(struct lan966x *lan966x)
{
+ struct vcap_admin *admin, *admin_next;
struct vcap_control *ctrl;
ctrl = lan966x->vcap_ctrl;
if (!ctrl)
return;
+ list_for_each_entry_safe(admin, admin_next, &ctrl->list, list) {
+ vcap_del_rules(ctrl, admin);
+ list_del(&admin->list);
+ lan966x_vcap_admin_free(admin);
+ }
+
kfree(ctrl);
}
--
2.38.0
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