1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3 
4 #ifndef __NFP_FLOWER_H__
5 #define __NFP_FLOWER_H__ 1
6 
7 #include "cmsg.h"
8 #include "../nfp_net.h"
9 
10 #include <linux/circ_buf.h>
11 #include <linux/hashtable.h>
12 #include <linux/rhashtable.h>
13 #include <linux/time64.h>
14 #include <linux/types.h>
15 #include <net/pkt_cls.h>
16 #include <net/tcp.h>
17 #include <linux/workqueue.h>
18 #include <linux/idr.h>
19 
20 struct nfp_fl_pre_lag;
21 struct net_device;
22 struct nfp_app;
23 
24 #define NFP_FL_STAT_ID_MU_NUM		GENMASK(31, 22)
25 #define NFP_FL_STAT_ID_STAT		GENMASK(21, 0)
26 
27 #define NFP_FL_STATS_ELEM_RS		sizeof_field(struct nfp_fl_stats_id, \
28 						     init_unalloc)
29 #define NFP_FLOWER_MASK_ENTRY_RS	256
30 #define NFP_FLOWER_MASK_ELEMENT_RS	1
31 #define NFP_FLOWER_MASK_HASH_BITS	10
32 
33 #define NFP_FL_META_FLAG_MANAGE_MASK	BIT(7)
34 
35 #define NFP_FL_MASK_REUSE_TIME_NS	40000
36 #define NFP_FL_MASK_ID_LOCATION		1
37 
38 /* Extra features bitmap. */
39 #define NFP_FL_FEATS_GENEVE		BIT(0)
40 #define NFP_FL_NBI_MTU_SETTING		BIT(1)
41 #define NFP_FL_FEATS_GENEVE_OPT		BIT(2)
42 #define NFP_FL_FEATS_VLAN_PCP		BIT(3)
43 #define NFP_FL_FEATS_VF_RLIM		BIT(4)
44 #define NFP_FL_FEATS_FLOW_MOD		BIT(5)
45 #define NFP_FL_FEATS_PRE_TUN_RULES	BIT(6)
46 #define NFP_FL_FEATS_IPV6_TUN		BIT(7)
47 #define NFP_FL_FEATS_HOST_ACK		BIT(31)
48 
49 #define NFP_FL_ENABLE_FLOW_MERGE	BIT(0)
50 #define NFP_FL_ENABLE_LAG		BIT(1)
51 
52 #define NFP_FL_FEATS_HOST \
53 	(NFP_FL_FEATS_GENEVE | \
54 	NFP_FL_NBI_MTU_SETTING | \
55 	NFP_FL_FEATS_GENEVE_OPT | \
56 	NFP_FL_FEATS_VLAN_PCP | \
57 	NFP_FL_FEATS_VF_RLIM | \
58 	NFP_FL_FEATS_FLOW_MOD | \
59 	NFP_FL_FEATS_PRE_TUN_RULES | \
60 	NFP_FL_FEATS_IPV6_TUN)
61 
62 struct nfp_fl_mask_id {
63 	struct circ_buf mask_id_free_list;
64 	ktime_t *last_used;
65 	u8 init_unallocated;
66 };
67 
68 struct nfp_fl_stats_id {
69 	struct circ_buf free_list;
70 	u32 init_unalloc;
71 	u8 repeated_em_count;
72 };
73 
74 /**
75  * struct nfp_fl_tunnel_offloads - priv data for tunnel offloads
76  * @offloaded_macs:	Hashtable of the offloaded MAC addresses
77  * @ipv4_off_list:	List of IPv4 addresses to offload
78  * @ipv6_off_list:	List of IPv6 addresses to offload
79  * @neigh_off_list_v4:	List of IPv4 neighbour offloads
80  * @neigh_off_list_v6:	List of IPv6 neighbour offloads
81  * @ipv4_off_lock:	Lock for the IPv4 address list
82  * @ipv6_off_lock:	Lock for the IPv6 address list
83  * @neigh_off_lock_v4:	Lock for the IPv4 neighbour address list
84  * @neigh_off_lock_v6:	Lock for the IPv6 neighbour address list
85  * @mac_off_ids:	IDA to manage id assignment for offloaded MACs
86  * @neigh_nb:		Notifier to monitor neighbour state
87  */
88 struct nfp_fl_tunnel_offloads {
89 	struct rhashtable offloaded_macs;
90 	struct list_head ipv4_off_list;
91 	struct list_head ipv6_off_list;
92 	struct list_head neigh_off_list_v4;
93 	struct list_head neigh_off_list_v6;
94 	struct mutex ipv4_off_lock;
95 	struct mutex ipv6_off_lock;
96 	spinlock_t neigh_off_lock_v4;
97 	spinlock_t neigh_off_lock_v6;
98 	struct ida mac_off_ids;
99 	struct notifier_block neigh_nb;
100 };
101 
102 /**
103  * struct nfp_mtu_conf - manage MTU setting
104  * @portnum:		NFP port number of repr with requested MTU change
105  * @requested_val:	MTU value requested for repr
106  * @ack:		Received ack that MTU has been correctly set
107  * @wait_q:		Wait queue for MTU acknowledgements
108  * @lock:		Lock for setting/reading MTU variables
109  */
110 struct nfp_mtu_conf {
111 	u32 portnum;
112 	unsigned int requested_val;
113 	bool ack;
114 	wait_queue_head_t wait_q;
115 	spinlock_t lock;
116 };
117 
118 /**
119  * struct nfp_fl_lag - Flower APP priv data for link aggregation
120  * @work:		Work queue for writing configs to the HW
121  * @lock:		Lock to protect lag_group_list
122  * @group_list:		List of all master/slave groups offloaded
123  * @ida_handle:		IDA to handle group ids
124  * @pkt_num:		Incremented for each config packet sent
125  * @batch_ver:		Incremented for each batch of config packets
126  * @global_inst:	Instance allocator for groups
127  * @rst_cfg:		Marker to reset HW LAG config
128  * @retrans_skbs:	Cmsgs that could not be processed by HW and require
129  *			retransmission
130  */
131 struct nfp_fl_lag {
132 	struct delayed_work work;
133 	struct mutex lock;
134 	struct list_head group_list;
135 	struct ida ida_handle;
136 	unsigned int pkt_num;
137 	unsigned int batch_ver;
138 	u8 global_inst;
139 	bool rst_cfg;
140 	struct sk_buff_head retrans_skbs;
141 };
142 
143 /**
144  * struct nfp_fl_internal_ports - Flower APP priv data for additional ports
145  * @port_ids:	Assignment of ids to any additional ports
146  * @lock:	Lock for extra ports list
147  */
148 struct nfp_fl_internal_ports {
149 	struct idr port_ids;
150 	spinlock_t lock;
151 };
152 
153 /**
154  * struct nfp_flower_priv - Flower APP per-vNIC priv data
155  * @app:		Back pointer to app
156  * @nn:			Pointer to vNIC
157  * @mask_id_seed:	Seed used for mask hash table
158  * @flower_version:	HW version of flower
159  * @flower_ext_feats:	Bitmap of extra features the HW supports
160  * @flower_en_feats:	Bitmap of features enabled by HW
161  * @stats_ids:		List of free stats ids
162  * @mask_ids:		List of free mask ids
163  * @mask_table:		Hash table used to store masks
164  * @stats_ring_size:	Maximum number of allowed stats ids
165  * @flow_table:		Hash table used to store flower rules
166  * @stats:		Stored stats updates for flower rules
167  * @stats_lock:		Lock for flower rule stats updates
168  * @stats_ctx_table:	Hash table to map stats contexts to its flow rule
169  * @cmsg_work:		Workqueue for control messages processing
170  * @cmsg_skbs_high:	List of higher priority skbs for control message
171  *			processing
172  * @cmsg_skbs_low:	List of lower priority skbs for control message
173  *			processing
174  * @tun:		Tunnel offload data
175  * @reify_replies:	atomically stores the number of replies received
176  *			from firmware for repr reify
177  * @reify_wait_queue:	wait queue for repr reify response counting
178  * @mtu_conf:		Configuration of repr MTU value
179  * @nfp_lag:		Link aggregation data block
180  * @indr_block_cb_priv:	List of priv data passed to indirect block cbs
181  * @non_repr_priv:	List of offloaded non-repr ports and their priv data
182  * @active_mem_unit:	Current active memory unit for flower rules
183  * @total_mem_units:	Total number of available memory units for flower rules
184  * @internal_ports:	Internal port ids used in offloaded rules
185  * @qos_stats_work:	Workqueue for qos stats processing
186  * @qos_rate_limiters:	Current active qos rate limiters
187  * @qos_stats_lock:	Lock on qos stats updates
188  * @pre_tun_rule_cnt:	Number of pre-tunnel rules offloaded
189  */
190 struct nfp_flower_priv {
191 	struct nfp_app *app;
192 	struct nfp_net *nn;
193 	u32 mask_id_seed;
194 	u64 flower_version;
195 	u64 flower_ext_feats;
196 	u8 flower_en_feats;
197 	struct nfp_fl_stats_id stats_ids;
198 	struct nfp_fl_mask_id mask_ids;
199 	DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS);
200 	u32 stats_ring_size;
201 	struct rhashtable flow_table;
202 	struct nfp_fl_stats *stats;
203 	spinlock_t stats_lock; /* lock stats */
204 	struct rhashtable stats_ctx_table;
205 	struct work_struct cmsg_work;
206 	struct sk_buff_head cmsg_skbs_high;
207 	struct sk_buff_head cmsg_skbs_low;
208 	struct nfp_fl_tunnel_offloads tun;
209 	atomic_t reify_replies;
210 	wait_queue_head_t reify_wait_queue;
211 	struct nfp_mtu_conf mtu_conf;
212 	struct nfp_fl_lag nfp_lag;
213 	struct list_head indr_block_cb_priv;
214 	struct list_head non_repr_priv;
215 	unsigned int active_mem_unit;
216 	unsigned int total_mem_units;
217 	struct nfp_fl_internal_ports internal_ports;
218 	struct delayed_work qos_stats_work;
219 	unsigned int qos_rate_limiters;
220 	spinlock_t qos_stats_lock; /* Protect the qos stats */
221 	int pre_tun_rule_cnt;
222 };
223 
224 /**
225  * struct nfp_fl_qos - Flower APP priv data for quality of service
226  * @netdev_port_id:	NFP port number of repr with qos info
227  * @curr_stats:		Currently stored stats updates for qos info
228  * @prev_stats:		Previously stored updates for qos info
229  * @last_update:	Stored time when last stats were updated
230  */
231 struct nfp_fl_qos {
232 	u32 netdev_port_id;
233 	struct nfp_stat_pair curr_stats;
234 	struct nfp_stat_pair prev_stats;
235 	u64 last_update;
236 };
237 
238 /**
239  * struct nfp_flower_repr_priv - Flower APP per-repr priv data
240  * @nfp_repr:		Back pointer to nfp_repr
241  * @lag_port_flags:	Extended port flags to record lag state of repr
242  * @mac_offloaded:	Flag indicating a MAC address is offloaded for repr
243  * @offloaded_mac_addr:	MAC address that has been offloaded for repr
244  * @block_shared:	Flag indicating if offload applies to shared blocks
245  * @mac_list:		List entry of reprs that share the same offloaded MAC
246  * @qos_table:		Stored info on filters implementing qos
247  * @on_bridge:		Indicates if the repr is attached to a bridge
248  */
249 struct nfp_flower_repr_priv {
250 	struct nfp_repr *nfp_repr;
251 	unsigned long lag_port_flags;
252 	bool mac_offloaded;
253 	u8 offloaded_mac_addr[ETH_ALEN];
254 	bool block_shared;
255 	struct list_head mac_list;
256 	struct nfp_fl_qos qos_table;
257 	bool on_bridge;
258 };
259 
260 /**
261  * struct nfp_flower_non_repr_priv - Priv data for non-repr offloaded ports
262  * @list:		List entry of offloaded reprs
263  * @netdev:		Pointer to non-repr net_device
264  * @ref_count:		Number of references held for this priv data
265  * @mac_offloaded:	Flag indicating a MAC address is offloaded for device
266  * @offloaded_mac_addr:	MAC address that has been offloaded for dev
267  */
268 struct nfp_flower_non_repr_priv {
269 	struct list_head list;
270 	struct net_device *netdev;
271 	int ref_count;
272 	bool mac_offloaded;
273 	u8 offloaded_mac_addr[ETH_ALEN];
274 };
275 
276 struct nfp_fl_key_ls {
277 	u32 key_layer_two;
278 	u8 key_layer;
279 	int key_size;
280 };
281 
282 struct nfp_fl_rule_metadata {
283 	u8 key_len;
284 	u8 mask_len;
285 	u8 act_len;
286 	u8 flags;
287 	__be32 host_ctx_id;
288 	__be64 host_cookie __packed;
289 	__be64 flow_version __packed;
290 	__be32 shortcut;
291 };
292 
293 struct nfp_fl_stats {
294 	u64 pkts;
295 	u64 bytes;
296 	u64 used;
297 };
298 
299 /**
300  * struct nfp_ipv6_addr_entry - cached IPv6 addresses
301  * @ipv6_addr:	IP address
302  * @ref_count:	number of rules currently using this IP
303  * @list:	list pointer
304  */
305 struct nfp_ipv6_addr_entry {
306 	struct in6_addr ipv6_addr;
307 	int ref_count;
308 	struct list_head list;
309 };
310 
311 struct nfp_fl_payload {
312 	struct nfp_fl_rule_metadata meta;
313 	unsigned long tc_flower_cookie;
314 	struct rhash_head fl_node;
315 	struct rcu_head rcu;
316 	__be32 nfp_tun_ipv4_addr;
317 	struct nfp_ipv6_addr_entry *nfp_tun_ipv6;
318 	struct net_device *ingress_dev;
319 	char *unmasked_data;
320 	char *mask_data;
321 	char *action_data;
322 	struct list_head linked_flows;
323 	bool in_hw;
324 	struct {
325 		struct net_device *dev;
326 		__be16 vlan_tci;
327 		__be16 port_idx;
328 	} pre_tun_rule;
329 };
330 
331 struct nfp_fl_payload_link {
332 	/* A link contains a pointer to a merge flow and an associated sub_flow.
333 	 * Each merge flow will feature in 2 links to its underlying sub_flows.
334 	 * A sub_flow will have at least 1 link to a merge flow or more if it
335 	 * has been used to create multiple merge flows.
336 	 *
337 	 * For a merge flow, 'linked_flows' in its nfp_fl_payload struct lists
338 	 * all links to sub_flows (sub_flow.flow) via merge.list.
339 	 * For a sub_flow, 'linked_flows' gives all links to merge flows it has
340 	 * formed (merge_flow.flow) via sub_flow.list.
341 	 */
342 	struct {
343 		struct list_head list;
344 		struct nfp_fl_payload *flow;
345 	} merge_flow, sub_flow;
346 };
347 
348 extern const struct rhashtable_params nfp_flower_table_params;
349 
350 struct nfp_fl_stats_frame {
351 	__be32 stats_con_id;
352 	__be32 pkt_count;
353 	__be64 byte_count;
354 	__be64 stats_cookie;
355 };
356 
357 static inline bool
358 nfp_flower_internal_port_can_offload(struct nfp_app *app,
359 				     struct net_device *netdev)
360 {
361 	struct nfp_flower_priv *app_priv = app->priv;
362 
363 	if (!(app_priv->flower_en_feats & NFP_FL_ENABLE_FLOW_MERGE))
364 		return false;
365 	if (!netdev->rtnl_link_ops)
366 		return false;
367 	if (!strcmp(netdev->rtnl_link_ops->kind, "openvswitch"))
368 		return true;
369 
370 	return false;
371 }
372 
373 /* The address of the merged flow acts as its cookie.
374  * Cookies supplied to us by TC flower are also addresses to allocated
375  * memory and thus this scheme should not generate any collisions.
376  */
377 static inline bool nfp_flower_is_merge_flow(struct nfp_fl_payload *flow_pay)
378 {
379 	return flow_pay->tc_flower_cookie == (unsigned long)flow_pay;
380 }
381 
382 static inline bool nfp_flower_is_supported_bridge(struct net_device *netdev)
383 {
384 	return netif_is_ovs_master(netdev);
385 }
386 
387 int nfp_flower_metadata_init(struct nfp_app *app, u64 host_ctx_count,
388 			     unsigned int host_ctx_split);
389 void nfp_flower_metadata_cleanup(struct nfp_app *app);
390 
391 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
392 			enum tc_setup_type type, void *type_data);
393 int nfp_flower_merge_offloaded_flows(struct nfp_app *app,
394 				     struct nfp_fl_payload *sub_flow1,
395 				     struct nfp_fl_payload *sub_flow2);
396 int nfp_flower_compile_flow_match(struct nfp_app *app,
397 				  struct flow_cls_offload *flow,
398 				  struct nfp_fl_key_ls *key_ls,
399 				  struct net_device *netdev,
400 				  struct nfp_fl_payload *nfp_flow,
401 				  enum nfp_flower_tun_type tun_type,
402 				  struct netlink_ext_ack *extack);
403 int nfp_flower_compile_action(struct nfp_app *app,
404 			      struct flow_cls_offload *flow,
405 			      struct net_device *netdev,
406 			      struct nfp_fl_payload *nfp_flow,
407 			      struct netlink_ext_ack *extack);
408 int nfp_compile_flow_metadata(struct nfp_app *app,
409 			      struct flow_cls_offload *flow,
410 			      struct nfp_fl_payload *nfp_flow,
411 			      struct net_device *netdev,
412 			      struct netlink_ext_ack *extack);
413 void __nfp_modify_flow_metadata(struct nfp_flower_priv *priv,
414 				struct nfp_fl_payload *nfp_flow);
415 int nfp_modify_flow_metadata(struct nfp_app *app,
416 			     struct nfp_fl_payload *nfp_flow);
417 
418 struct nfp_fl_payload *
419 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie,
420 			   struct net_device *netdev);
421 struct nfp_fl_payload *
422 nfp_flower_get_fl_payload_from_ctx(struct nfp_app *app, u32 ctx_id);
423 struct nfp_fl_payload *
424 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie);
425 
426 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb);
427 
428 int nfp_tunnel_config_start(struct nfp_app *app);
429 void nfp_tunnel_config_stop(struct nfp_app *app);
430 int nfp_tunnel_mac_event_handler(struct nfp_app *app,
431 				 struct net_device *netdev,
432 				 unsigned long event, void *ptr);
433 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4);
434 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4);
435 void
436 nfp_tunnel_put_ipv6_off(struct nfp_app *app, struct nfp_ipv6_addr_entry *entry);
437 struct nfp_ipv6_addr_entry *
438 nfp_tunnel_add_ipv6_off(struct nfp_app *app, struct in6_addr *ipv6);
439 void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb);
440 void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb);
441 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb);
442 void nfp_tunnel_keep_alive_v6(struct nfp_app *app, struct sk_buff *skb);
443 void nfp_flower_lag_init(struct nfp_fl_lag *lag);
444 void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag);
445 int nfp_flower_lag_reset(struct nfp_fl_lag *lag);
446 int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv,
447 				struct net_device *netdev,
448 				unsigned long event, void *ptr);
449 bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb);
450 int nfp_flower_lag_populate_pre_action(struct nfp_app *app,
451 				       struct net_device *master,
452 				       struct nfp_fl_pre_lag *pre_act,
453 				       struct netlink_ext_ack *extack);
454 int nfp_flower_lag_get_output_id(struct nfp_app *app,
455 				 struct net_device *master);
456 void nfp_flower_qos_init(struct nfp_app *app);
457 void nfp_flower_qos_cleanup(struct nfp_app *app);
458 int nfp_flower_setup_qos_offload(struct nfp_app *app, struct net_device *netdev,
459 				 struct tc_cls_matchall_offload *flow);
460 void nfp_flower_stats_rlim_reply(struct nfp_app *app, struct sk_buff *skb);
461 int nfp_flower_indr_setup_tc_cb(struct net_device *netdev, void *cb_priv,
462 				enum tc_setup_type type, void *type_data);
463 int nfp_flower_setup_indr_block_cb(enum tc_setup_type type, void *type_data,
464 				   void *cb_priv);
465 
466 void
467 __nfp_flower_non_repr_priv_get(struct nfp_flower_non_repr_priv *non_repr_priv);
468 struct nfp_flower_non_repr_priv *
469 nfp_flower_non_repr_priv_get(struct nfp_app *app, struct net_device *netdev);
470 void
471 __nfp_flower_non_repr_priv_put(struct nfp_flower_non_repr_priv *non_repr_priv);
472 void
473 nfp_flower_non_repr_priv_put(struct nfp_app *app, struct net_device *netdev);
474 u32 nfp_flower_get_port_id_from_netdev(struct nfp_app *app,
475 				       struct net_device *netdev);
476 int nfp_flower_xmit_pre_tun_flow(struct nfp_app *app,
477 				 struct nfp_fl_payload *flow);
478 int nfp_flower_xmit_pre_tun_del_flow(struct nfp_app *app,
479 				     struct nfp_fl_payload *flow);
480 #endif
481