1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
3 
4 #ifndef __MTK_PPE_H
5 #define __MTK_PPE_H
6 
7 #include <linux/kernel.h>
8 #include <linux/bitfield.h>
9 #include <linux/rhashtable.h>
10 
11 #define MTK_PPE_ENTRIES_SHIFT		3
12 #define MTK_PPE_ENTRIES			(1024 << MTK_PPE_ENTRIES_SHIFT)
13 #define MTK_PPE_HASH_MASK		(MTK_PPE_ENTRIES - 1)
14 #define MTK_PPE_WAIT_TIMEOUT_US		1000000
15 
16 #define MTK_FOE_IB1_UNBIND_TIMESTAMP	GENMASK(7, 0)
17 #define MTK_FOE_IB1_UNBIND_PACKETS	GENMASK(23, 8)
18 #define MTK_FOE_IB1_UNBIND_PREBIND	BIT(24)
19 
20 #define MTK_FOE_IB1_BIND_TIMESTAMP	GENMASK(14, 0)
21 #define MTK_FOE_IB1_BIND_KEEPALIVE	BIT(15)
22 #define MTK_FOE_IB1_BIND_VLAN_LAYER	GENMASK(18, 16)
23 #define MTK_FOE_IB1_BIND_PPPOE		BIT(19)
24 #define MTK_FOE_IB1_BIND_VLAN_TAG	BIT(20)
25 #define MTK_FOE_IB1_BIND_PKT_SAMPLE	BIT(21)
26 #define MTK_FOE_IB1_BIND_CACHE		BIT(22)
27 #define MTK_FOE_IB1_BIND_TUNNEL_DECAP	BIT(23)
28 #define MTK_FOE_IB1_BIND_TTL		BIT(24)
29 
30 #define MTK_FOE_IB1_PACKET_TYPE		GENMASK(27, 25)
31 #define MTK_FOE_IB1_STATE		GENMASK(29, 28)
32 #define MTK_FOE_IB1_UDP			BIT(30)
33 #define MTK_FOE_IB1_STATIC		BIT(31)
34 
35 /* CONFIG_MEDIATEK_NETSYS_V2 */
36 #define MTK_FOE_IB1_BIND_TIMESTAMP_V2	GENMASK(7, 0)
37 #define MTK_FOE_IB1_BIND_VLAN_LAYER_V2	GENMASK(16, 14)
38 #define MTK_FOE_IB1_BIND_PPPOE_V2	BIT(17)
39 #define MTK_FOE_IB1_BIND_VLAN_TAG_V2	BIT(18)
40 #define MTK_FOE_IB1_BIND_CACHE_V2	BIT(20)
41 #define MTK_FOE_IB1_BIND_TTL_V2		BIT(22)
42 #define MTK_FOE_IB1_PACKET_TYPE_V2	GENMASK(27, 23)
43 
44 enum {
45 	MTK_PPE_PKT_TYPE_IPV4_HNAPT = 0,
46 	MTK_PPE_PKT_TYPE_IPV4_ROUTE = 1,
47 	MTK_PPE_PKT_TYPE_BRIDGE = 2,
48 	MTK_PPE_PKT_TYPE_IPV4_DSLITE = 3,
49 	MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T = 4,
50 	MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T = 5,
51 	MTK_PPE_PKT_TYPE_IPV6_6RD = 7,
52 };
53 
54 #define MTK_FOE_IB2_QID			GENMASK(3, 0)
55 #define MTK_FOE_IB2_PSE_QOS		BIT(4)
56 #define MTK_FOE_IB2_DEST_PORT		GENMASK(7, 5)
57 #define MTK_FOE_IB2_MULTICAST		BIT(8)
58 
59 #define MTK_FOE_IB2_WDMA_QID2		GENMASK(13, 12)
60 #define MTK_FOE_IB2_WDMA_DEVIDX		BIT(16)
61 #define MTK_FOE_IB2_WDMA_WINFO		BIT(17)
62 
63 #define MTK_FOE_IB2_PORT_MG		GENMASK(17, 12)
64 
65 #define MTK_FOE_IB2_RX_IDX		GENMASK(18, 17)
66 #define MTK_FOE_IB2_PORT_AG		GENMASK(23, 18)
67 
68 #define MTK_FOE_IB2_DSCP		GENMASK(31, 24)
69 
70 /* CONFIG_MEDIATEK_NETSYS_V2 */
71 #define MTK_FOE_IB2_PORT_MG_V2		BIT(7)
72 #define MTK_FOE_IB2_DEST_PORT_V2	GENMASK(12, 9)
73 #define MTK_FOE_IB2_MULTICAST_V2	BIT(13)
74 #define MTK_FOE_IB2_WDMA_WINFO_V2	BIT(19)
75 #define MTK_FOE_IB2_PORT_AG_V2		GENMASK(23, 20)
76 
77 #define MTK_FOE_VLAN2_WINFO_BSS		GENMASK(5, 0)
78 #define MTK_FOE_VLAN2_WINFO_WCID	GENMASK(13, 6)
79 #define MTK_FOE_VLAN2_WINFO_RING	GENMASK(15, 14)
80 
81 #define MTK_FOE_WINFO_BSS		GENMASK(5, 0)
82 #define MTK_FOE_WINFO_WCID		GENMASK(15, 6)
83 
84 enum {
85 	MTK_FOE_STATE_INVALID,
86 	MTK_FOE_STATE_UNBIND,
87 	MTK_FOE_STATE_BIND,
88 	MTK_FOE_STATE_FIN
89 };
90 
91 struct mtk_foe_mac_info {
92 	u16 vlan1;
93 	u16 etype;
94 
95 	u32 dest_mac_hi;
96 
97 	u16 vlan2;
98 	u16 dest_mac_lo;
99 
100 	u32 src_mac_hi;
101 
102 	u16 pppoe_id;
103 	u16 src_mac_lo;
104 
105 	u16 minfo;
106 	u16 winfo;
107 };
108 
109 /* software-only entry type */
110 struct mtk_foe_bridge {
111 	u8 dest_mac[ETH_ALEN];
112 	u8 src_mac[ETH_ALEN];
113 	u16 vlan;
114 
115 	struct {} key_end;
116 
117 	u32 ib2;
118 
119 	struct mtk_foe_mac_info l2;
120 };
121 
122 struct mtk_ipv4_tuple {
123 	u32 src_ip;
124 	u32 dest_ip;
125 	union {
126 		struct {
127 			u16 dest_port;
128 			u16 src_port;
129 		};
130 		struct {
131 			u8 protocol;
132 			u8 _pad[3]; /* fill with 0xa5a5a5 */
133 		};
134 		u32 ports;
135 	};
136 };
137 
138 struct mtk_foe_ipv4 {
139 	struct mtk_ipv4_tuple orig;
140 
141 	u32 ib2;
142 
143 	struct mtk_ipv4_tuple new;
144 
145 	u16 timestamp;
146 	u16 _rsv0[3];
147 
148 	u32 udf_tsid;
149 
150 	struct mtk_foe_mac_info l2;
151 };
152 
153 struct mtk_foe_ipv4_dslite {
154 	struct mtk_ipv4_tuple ip4;
155 
156 	u32 tunnel_src_ip[4];
157 	u32 tunnel_dest_ip[4];
158 
159 	u8 flow_label[3];
160 	u8 priority;
161 
162 	u32 udf_tsid;
163 
164 	u32 ib2;
165 
166 	struct mtk_foe_mac_info l2;
167 };
168 
169 struct mtk_foe_ipv6 {
170 	u32 src_ip[4];
171 	u32 dest_ip[4];
172 
173 	union {
174 		struct {
175 			u8 protocol;
176 			u8 _pad[3]; /* fill with 0xa5a5a5 */
177 		}; /* 3-tuple */
178 		struct {
179 			u16 dest_port;
180 			u16 src_port;
181 		}; /* 5-tuple */
182 		u32 ports;
183 	};
184 
185 	u32 _rsv[3];
186 
187 	u32 udf;
188 
189 	u32 ib2;
190 	struct mtk_foe_mac_info l2;
191 };
192 
193 struct mtk_foe_ipv6_6rd {
194 	u32 src_ip[4];
195 	u32 dest_ip[4];
196 	u16 dest_port;
197 	u16 src_port;
198 
199 	u32 tunnel_src_ip;
200 	u32 tunnel_dest_ip;
201 
202 	u16 hdr_csum;
203 	u8 dscp;
204 	u8 ttl;
205 
206 	u8 flag;
207 	u8 pad;
208 	u8 per_flow_6rd_id;
209 	u8 pad2;
210 
211 	u32 ib2;
212 	struct mtk_foe_mac_info l2;
213 };
214 
215 struct mtk_foe_entry {
216 	u32 ib1;
217 
218 	union {
219 		struct mtk_foe_bridge bridge;
220 		struct mtk_foe_ipv4 ipv4;
221 		struct mtk_foe_ipv4_dslite dslite;
222 		struct mtk_foe_ipv6 ipv6;
223 		struct mtk_foe_ipv6_6rd ipv6_6rd;
224 		u32 data[23];
225 	};
226 };
227 
228 enum {
229 	MTK_PPE_CPU_REASON_TTL_EXCEEDED			= 0x02,
230 	MTK_PPE_CPU_REASON_OPTION_HEADER		= 0x03,
231 	MTK_PPE_CPU_REASON_NO_FLOW			= 0x07,
232 	MTK_PPE_CPU_REASON_IPV4_FRAG			= 0x08,
233 	MTK_PPE_CPU_REASON_IPV4_DSLITE_FRAG		= 0x09,
234 	MTK_PPE_CPU_REASON_IPV4_DSLITE_NO_TCP_UDP	= 0x0a,
235 	MTK_PPE_CPU_REASON_IPV6_6RD_NO_TCP_UDP		= 0x0b,
236 	MTK_PPE_CPU_REASON_TCP_FIN_SYN_RST		= 0x0c,
237 	MTK_PPE_CPU_REASON_UN_HIT			= 0x0d,
238 	MTK_PPE_CPU_REASON_HIT_UNBIND			= 0x0e,
239 	MTK_PPE_CPU_REASON_HIT_UNBIND_RATE_REACHED	= 0x0f,
240 	MTK_PPE_CPU_REASON_HIT_BIND_TCP_FIN		= 0x10,
241 	MTK_PPE_CPU_REASON_HIT_TTL_1			= 0x11,
242 	MTK_PPE_CPU_REASON_HIT_BIND_VLAN_VIOLATION	= 0x12,
243 	MTK_PPE_CPU_REASON_KEEPALIVE_UC_OLD_HDR		= 0x13,
244 	MTK_PPE_CPU_REASON_KEEPALIVE_MC_NEW_HDR		= 0x14,
245 	MTK_PPE_CPU_REASON_KEEPALIVE_DUP_OLD_HDR	= 0x15,
246 	MTK_PPE_CPU_REASON_HIT_BIND_FORCE_CPU		= 0x16,
247 	MTK_PPE_CPU_REASON_TUNNEL_OPTION_HEADER		= 0x17,
248 	MTK_PPE_CPU_REASON_MULTICAST_TO_CPU		= 0x18,
249 	MTK_PPE_CPU_REASON_MULTICAST_TO_GMAC1_CPU	= 0x19,
250 	MTK_PPE_CPU_REASON_HIT_PRE_BIND			= 0x1a,
251 	MTK_PPE_CPU_REASON_PACKET_SAMPLING		= 0x1b,
252 	MTK_PPE_CPU_REASON_EXCEED_MTU			= 0x1c,
253 	MTK_PPE_CPU_REASON_PPE_BYPASS			= 0x1e,
254 	MTK_PPE_CPU_REASON_INVALID			= 0x1f,
255 };
256 
257 enum {
258 	MTK_FLOW_TYPE_L4,
259 	MTK_FLOW_TYPE_L2,
260 	MTK_FLOW_TYPE_L2_SUBFLOW,
261 };
262 
263 struct mtk_flow_entry {
264 	union {
265 		struct hlist_node list;
266 		struct {
267 			struct rhash_head l2_node;
268 			struct hlist_head l2_flows;
269 		};
270 	};
271 	u8 type;
272 	s8 wed_index;
273 	u8 ppe_index;
274 	u16 hash;
275 	union {
276 		struct mtk_foe_entry data;
277 		struct {
278 			struct mtk_flow_entry *base_flow;
279 			struct hlist_node list;
280 			struct {} end;
281 		} l2_data;
282 	};
283 	struct rhash_head node;
284 	unsigned long cookie;
285 };
286 
287 struct mtk_ppe {
288 	struct mtk_eth *eth;
289 	struct device *dev;
290 	void __iomem *base;
291 	int version;
292 	char dirname[5];
293 
294 	void *foe_table;
295 	dma_addr_t foe_phys;
296 
297 	u16 foe_check_time[MTK_PPE_ENTRIES];
298 	struct hlist_head *foe_flow;
299 
300 	struct rhashtable l2_flows;
301 
302 	void *acct_table;
303 };
304 
305 struct mtk_ppe *mtk_ppe_init(struct mtk_eth *eth, void __iomem *base,
306 			     int version, int index);
307 void mtk_ppe_deinit(struct mtk_eth *eth);
308 void mtk_ppe_start(struct mtk_ppe *ppe);
309 int mtk_ppe_stop(struct mtk_ppe *ppe);
310 
311 void __mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash);
312 
313 static inline void
314 mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash)
315 {
316 	u16 now, diff;
317 
318 	if (!ppe)
319 		return;
320 
321 	if (hash > MTK_PPE_HASH_MASK)
322 		return;
323 
324 	now = (u16)jiffies;
325 	diff = now - ppe->foe_check_time[hash];
326 	if (diff < HZ / 10)
327 		return;
328 
329 	ppe->foe_check_time[hash] = now;
330 	__mtk_ppe_check_skb(ppe, skb, hash);
331 }
332 
333 int mtk_foe_entry_prepare(struct mtk_eth *eth, struct mtk_foe_entry *entry,
334 			  int type, int l4proto, u8 pse_port, u8 *src_mac,
335 			  u8 *dest_mac);
336 int mtk_foe_entry_set_pse_port(struct mtk_eth *eth,
337 			       struct mtk_foe_entry *entry, u8 port);
338 int mtk_foe_entry_set_ipv4_tuple(struct mtk_eth *eth,
339 				 struct mtk_foe_entry *entry, bool orig,
340 				 __be32 src_addr, __be16 src_port,
341 				 __be32 dest_addr, __be16 dest_port);
342 int mtk_foe_entry_set_ipv6_tuple(struct mtk_eth *eth,
343 				 struct mtk_foe_entry *entry,
344 				 __be32 *src_addr, __be16 src_port,
345 				 __be32 *dest_addr, __be16 dest_port);
346 int mtk_foe_entry_set_dsa(struct mtk_eth *eth, struct mtk_foe_entry *entry,
347 			  int port);
348 int mtk_foe_entry_set_vlan(struct mtk_eth *eth, struct mtk_foe_entry *entry,
349 			   int vid);
350 int mtk_foe_entry_set_pppoe(struct mtk_eth *eth, struct mtk_foe_entry *entry,
351 			    int sid);
352 int mtk_foe_entry_set_wdma(struct mtk_eth *eth, struct mtk_foe_entry *entry,
353 			   int wdma_idx, int txq, int bss, int wcid);
354 int mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_flow_entry *entry);
355 void mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry);
356 int mtk_foe_entry_idle_time(struct mtk_ppe *ppe, struct mtk_flow_entry *entry);
357 int mtk_ppe_debugfs_init(struct mtk_ppe *ppe, int index);
358 
359 #endif
360