1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Microsemi Ocelot Switch driver
3  * Copyright (c) 2019 Microsemi Corporation
4  */
5 
6 #include <linux/iopoll.h>
7 #include <linux/proc_fs.h>
8 
9 #include <soc/mscc/ocelot_vcap.h>
10 #include "ocelot_police.h"
11 #include "ocelot_vcap.h"
12 
13 #define ENTRY_WIDTH 32
14 
15 enum vcap_sel {
16 	VCAP_SEL_ENTRY = 0x1,
17 	VCAP_SEL_ACTION = 0x2,
18 	VCAP_SEL_COUNTER = 0x4,
19 	VCAP_SEL_ALL = 0x7,
20 };
21 
22 enum vcap_cmd {
23 	VCAP_CMD_WRITE = 0, /* Copy from Cache to TCAM */
24 	VCAP_CMD_READ = 1, /* Copy from TCAM to Cache */
25 	VCAP_CMD_MOVE_UP = 2, /* Move <count> up */
26 	VCAP_CMD_MOVE_DOWN = 3, /* Move <count> down */
27 	VCAP_CMD_INITIALIZE = 4, /* Write all (from cache) */
28 };
29 
30 #define VCAP_ENTRY_WIDTH 12 /* Max entry width (32bit words) */
31 #define VCAP_COUNTER_WIDTH 4 /* Max counter width (32bit words) */
32 
33 struct vcap_data {
34 	u32 entry[VCAP_ENTRY_WIDTH]; /* ENTRY_DAT */
35 	u32 mask[VCAP_ENTRY_WIDTH]; /* MASK_DAT */
36 	u32 action[VCAP_ENTRY_WIDTH]; /* ACTION_DAT */
37 	u32 counter[VCAP_COUNTER_WIDTH]; /* CNT_DAT */
38 	u32 tg; /* TG_DAT */
39 	u32 type; /* Action type */
40 	u32 tg_sw; /* Current type-group */
41 	u32 cnt; /* Current counter */
42 	u32 key_offset; /* Current entry offset */
43 	u32 action_offset; /* Current action offset */
44 	u32 counter_offset; /* Current counter offset */
45 	u32 tg_value; /* Current type-group value */
46 	u32 tg_mask; /* Current type-group mask */
47 };
48 
vcap_read_update_ctrl(struct ocelot * ocelot,const struct vcap_props * vcap)49 static u32 vcap_read_update_ctrl(struct ocelot *ocelot,
50 				 const struct vcap_props *vcap)
51 {
52 	return ocelot_target_read(ocelot, vcap->target, VCAP_CORE_UPDATE_CTRL);
53 }
54 
vcap_cmd(struct ocelot * ocelot,const struct vcap_props * vcap,u16 ix,int cmd,int sel)55 static void vcap_cmd(struct ocelot *ocelot, const struct vcap_props *vcap,
56 		     u16 ix, int cmd, int sel)
57 {
58 	u32 value = (VCAP_CORE_UPDATE_CTRL_UPDATE_CMD(cmd) |
59 		     VCAP_CORE_UPDATE_CTRL_UPDATE_ADDR(ix) |
60 		     VCAP_CORE_UPDATE_CTRL_UPDATE_SHOT);
61 
62 	if ((sel & VCAP_SEL_ENTRY) && ix >= vcap->entry_count)
63 		return;
64 
65 	if (!(sel & VCAP_SEL_ENTRY))
66 		value |= VCAP_CORE_UPDATE_CTRL_UPDATE_ENTRY_DIS;
67 
68 	if (!(sel & VCAP_SEL_ACTION))
69 		value |= VCAP_CORE_UPDATE_CTRL_UPDATE_ACTION_DIS;
70 
71 	if (!(sel & VCAP_SEL_COUNTER))
72 		value |= VCAP_CORE_UPDATE_CTRL_UPDATE_CNT_DIS;
73 
74 	ocelot_target_write(ocelot, vcap->target, value, VCAP_CORE_UPDATE_CTRL);
75 
76 	read_poll_timeout(vcap_read_update_ctrl, value,
77 			  (value & VCAP_CORE_UPDATE_CTRL_UPDATE_SHOT) == 0,
78 			  10, 100000, false, ocelot, vcap);
79 }
80 
81 /* Convert from 0-based row to VCAP entry row and run command */
vcap_row_cmd(struct ocelot * ocelot,const struct vcap_props * vcap,u32 row,int cmd,int sel)82 static void vcap_row_cmd(struct ocelot *ocelot, const struct vcap_props *vcap,
83 			 u32 row, int cmd, int sel)
84 {
85 	vcap_cmd(ocelot, vcap, vcap->entry_count - row - 1, cmd, sel);
86 }
87 
vcap_entry2cache(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)88 static void vcap_entry2cache(struct ocelot *ocelot,
89 			     const struct vcap_props *vcap,
90 			     struct vcap_data *data)
91 {
92 	u32 entry_words, i;
93 
94 	entry_words = DIV_ROUND_UP(vcap->entry_width, ENTRY_WIDTH);
95 
96 	for (i = 0; i < entry_words; i++) {
97 		ocelot_target_write_rix(ocelot, vcap->target, data->entry[i],
98 					VCAP_CACHE_ENTRY_DAT, i);
99 		ocelot_target_write_rix(ocelot, vcap->target, ~data->mask[i],
100 					VCAP_CACHE_MASK_DAT, i);
101 	}
102 	ocelot_target_write(ocelot, vcap->target, data->tg, VCAP_CACHE_TG_DAT);
103 }
104 
vcap_cache2entry(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)105 static void vcap_cache2entry(struct ocelot *ocelot,
106 			     const struct vcap_props *vcap,
107 			     struct vcap_data *data)
108 {
109 	u32 entry_words, i;
110 
111 	entry_words = DIV_ROUND_UP(vcap->entry_width, ENTRY_WIDTH);
112 
113 	for (i = 0; i < entry_words; i++) {
114 		data->entry[i] = ocelot_target_read_rix(ocelot, vcap->target,
115 							VCAP_CACHE_ENTRY_DAT, i);
116 		// Invert mask
117 		data->mask[i] = ~ocelot_target_read_rix(ocelot, vcap->target,
118 							VCAP_CACHE_MASK_DAT, i);
119 	}
120 	data->tg = ocelot_target_read(ocelot, vcap->target, VCAP_CACHE_TG_DAT);
121 }
122 
vcap_action2cache(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)123 static void vcap_action2cache(struct ocelot *ocelot,
124 			      const struct vcap_props *vcap,
125 			      struct vcap_data *data)
126 {
127 	u32 action_words, mask;
128 	int i, width;
129 
130 	/* Encode action type */
131 	width = vcap->action_type_width;
132 	if (width) {
133 		mask = GENMASK(width, 0);
134 		data->action[0] = ((data->action[0] & ~mask) | data->type);
135 	}
136 
137 	action_words = DIV_ROUND_UP(vcap->action_width, ENTRY_WIDTH);
138 
139 	for (i = 0; i < action_words; i++)
140 		ocelot_target_write_rix(ocelot, vcap->target, data->action[i],
141 					VCAP_CACHE_ACTION_DAT, i);
142 
143 	for (i = 0; i < vcap->counter_words; i++)
144 		ocelot_target_write_rix(ocelot, vcap->target, data->counter[i],
145 					VCAP_CACHE_CNT_DAT, i);
146 }
147 
vcap_cache2action(struct ocelot * ocelot,const struct vcap_props * vcap,struct vcap_data * data)148 static void vcap_cache2action(struct ocelot *ocelot,
149 			      const struct vcap_props *vcap,
150 			      struct vcap_data *data)
151 {
152 	u32 action_words;
153 	int i, width;
154 
155 	action_words = DIV_ROUND_UP(vcap->action_width, ENTRY_WIDTH);
156 
157 	for (i = 0; i < action_words; i++)
158 		data->action[i] = ocelot_target_read_rix(ocelot, vcap->target,
159 							 VCAP_CACHE_ACTION_DAT,
160 							 i);
161 
162 	for (i = 0; i < vcap->counter_words; i++)
163 		data->counter[i] = ocelot_target_read_rix(ocelot, vcap->target,
164 							  VCAP_CACHE_CNT_DAT,
165 							  i);
166 
167 	/* Extract action type */
168 	width = vcap->action_type_width;
169 	data->type = (width ? (data->action[0] & GENMASK(width, 0)) : 0);
170 }
171 
172 /* Calculate offsets for entry */
vcap_data_offset_get(const struct vcap_props * vcap,struct vcap_data * data,int ix)173 static void vcap_data_offset_get(const struct vcap_props *vcap,
174 				 struct vcap_data *data, int ix)
175 {
176 	int num_subwords_per_entry, num_subwords_per_action;
177 	int i, col, offset, num_entries_per_row, base;
178 	u32 width = vcap->tg_width;
179 
180 	switch (data->tg_sw) {
181 	case VCAP_TG_FULL:
182 		num_entries_per_row = 1;
183 		break;
184 	case VCAP_TG_HALF:
185 		num_entries_per_row = 2;
186 		break;
187 	case VCAP_TG_QUARTER:
188 		num_entries_per_row = 4;
189 		break;
190 	default:
191 		return;
192 	}
193 
194 	col = (ix % num_entries_per_row);
195 	num_subwords_per_entry = (vcap->sw_count / num_entries_per_row);
196 	base = (vcap->sw_count - col * num_subwords_per_entry -
197 		num_subwords_per_entry);
198 	data->tg_value = 0;
199 	data->tg_mask = 0;
200 	for (i = 0; i < num_subwords_per_entry; i++) {
201 		offset = ((base + i) * width);
202 		data->tg_value |= (data->tg_sw << offset);
203 		data->tg_mask |= GENMASK(offset + width - 1, offset);
204 	}
205 
206 	/* Calculate key/action/counter offsets */
207 	col = (num_entries_per_row - col - 1);
208 	data->key_offset = (base * vcap->entry_width) / vcap->sw_count;
209 	data->counter_offset = (num_subwords_per_entry * col *
210 				vcap->counter_width);
211 	i = data->type;
212 	width = vcap->action_table[i].width;
213 	num_subwords_per_action = vcap->action_table[i].count;
214 	data->action_offset = ((num_subwords_per_action * col * width) /
215 				num_entries_per_row);
216 	data->action_offset += vcap->action_type_width;
217 }
218 
vcap_data_set(u32 * data,u32 offset,u32 len,u32 value)219 static void vcap_data_set(u32 *data, u32 offset, u32 len, u32 value)
220 {
221 	u32 i, v, m;
222 
223 	for (i = 0; i < len; i++, offset++) {
224 		v = data[offset / ENTRY_WIDTH];
225 		m = (1 << (offset % ENTRY_WIDTH));
226 		if (value & (1 << i))
227 			v |= m;
228 		else
229 			v &= ~m;
230 		data[offset / ENTRY_WIDTH] = v;
231 	}
232 }
233 
vcap_data_get(u32 * data,u32 offset,u32 len)234 static u32 vcap_data_get(u32 *data, u32 offset, u32 len)
235 {
236 	u32 i, v, m, value = 0;
237 
238 	for (i = 0; i < len; i++, offset++) {
239 		v = data[offset / ENTRY_WIDTH];
240 		m = (1 << (offset % ENTRY_WIDTH));
241 		if (v & m)
242 			value |= (1 << i);
243 	}
244 	return value;
245 }
246 
vcap_key_field_set(struct vcap_data * data,u32 offset,u32 width,u32 value,u32 mask)247 static void vcap_key_field_set(struct vcap_data *data, u32 offset, u32 width,
248 			       u32 value, u32 mask)
249 {
250 	vcap_data_set(data->entry, offset + data->key_offset, width, value);
251 	vcap_data_set(data->mask, offset + data->key_offset, width, mask);
252 }
253 
vcap_key_set(const struct vcap_props * vcap,struct vcap_data * data,int field,u32 value,u32 mask)254 static void vcap_key_set(const struct vcap_props *vcap, struct vcap_data *data,
255 			 int field, u32 value, u32 mask)
256 {
257 	u32 offset = vcap->keys[field].offset;
258 	u32 length = vcap->keys[field].length;
259 
260 	vcap_key_field_set(data, offset, length, value, mask);
261 }
262 
vcap_key_bytes_set(const struct vcap_props * vcap,struct vcap_data * data,int field,u8 * val,u8 * msk)263 static void vcap_key_bytes_set(const struct vcap_props *vcap,
264 			       struct vcap_data *data, int field,
265 			       u8 *val, u8 *msk)
266 {
267 	u32 offset = vcap->keys[field].offset;
268 	u32 count  = vcap->keys[field].length;
269 	u32 i, j, n = 0, value = 0, mask = 0;
270 
271 	WARN_ON(count % 8);
272 
273 	/* Data wider than 32 bits are split up in chunks of maximum 32 bits.
274 	 * The 32 LSB of the data are written to the 32 MSB of the TCAM.
275 	 */
276 	offset += count;
277 	count /= 8;
278 
279 	for (i = 0; i < count; i++) {
280 		j = (count - i - 1);
281 		value += (val[j] << n);
282 		mask += (msk[j] << n);
283 		n += 8;
284 		if (n == ENTRY_WIDTH || (i + 1) == count) {
285 			offset -= n;
286 			vcap_key_field_set(data, offset, n, value, mask);
287 			n = 0;
288 			value = 0;
289 			mask = 0;
290 		}
291 	}
292 }
293 
vcap_key_l4_port_set(const struct vcap_props * vcap,struct vcap_data * data,int field,struct ocelot_vcap_udp_tcp * port)294 static void vcap_key_l4_port_set(const struct vcap_props *vcap,
295 				 struct vcap_data *data, int field,
296 				 struct ocelot_vcap_udp_tcp *port)
297 {
298 	u32 offset = vcap->keys[field].offset;
299 	u32 length = vcap->keys[field].length;
300 
301 	WARN_ON(length != 16);
302 
303 	vcap_key_field_set(data, offset, length, port->value, port->mask);
304 }
305 
vcap_key_bit_set(const struct vcap_props * vcap,struct vcap_data * data,int field,enum ocelot_vcap_bit val)306 static void vcap_key_bit_set(const struct vcap_props *vcap,
307 			     struct vcap_data *data, int field,
308 			     enum ocelot_vcap_bit val)
309 {
310 	u32 value = (val == OCELOT_VCAP_BIT_1 ? 1 : 0);
311 	u32 msk = (val == OCELOT_VCAP_BIT_ANY ? 0 : 1);
312 	u32 offset = vcap->keys[field].offset;
313 	u32 length = vcap->keys[field].length;
314 
315 	WARN_ON(length != 1);
316 
317 	vcap_key_field_set(data, offset, length, value, msk);
318 }
319 
vcap_action_set(const struct vcap_props * vcap,struct vcap_data * data,int field,u32 value)320 static void vcap_action_set(const struct vcap_props *vcap,
321 			    struct vcap_data *data, int field, u32 value)
322 {
323 	int offset = vcap->actions[field].offset;
324 	int length = vcap->actions[field].length;
325 
326 	vcap_data_set(data->action, offset + data->action_offset, length,
327 		      value);
328 }
329 
is2_action_set(struct ocelot * ocelot,struct vcap_data * data,struct ocelot_vcap_filter * filter)330 static void is2_action_set(struct ocelot *ocelot, struct vcap_data *data,
331 			   struct ocelot_vcap_filter *filter)
332 {
333 	const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2];
334 	struct ocelot_vcap_action *a = &filter->action;
335 
336 	vcap_action_set(vcap, data, VCAP_IS2_ACT_MASK_MODE, a->mask_mode);
337 	vcap_action_set(vcap, data, VCAP_IS2_ACT_PORT_MASK, a->port_mask);
338 	vcap_action_set(vcap, data, VCAP_IS2_ACT_MIRROR_ENA, a->mirror_ena);
339 	vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_ENA, a->police_ena);
340 	vcap_action_set(vcap, data, VCAP_IS2_ACT_POLICE_IDX, a->pol_ix);
341 	vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_QU_NUM, a->cpu_qu_num);
342 	vcap_action_set(vcap, data, VCAP_IS2_ACT_CPU_COPY_ENA, a->cpu_copy_ena);
343 }
344 
is2_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)345 static void is2_entry_set(struct ocelot *ocelot, int ix,
346 			  struct ocelot_vcap_filter *filter)
347 {
348 	const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS2];
349 	struct ocelot_vcap_key_vlan *tag = &filter->vlan;
350 	u32 val, msk, type, type_mask = 0xf, i, count;
351 	struct ocelot_vcap_u64 payload;
352 	struct vcap_data data;
353 	int row = (ix / 2);
354 
355 	memset(&payload, 0, sizeof(payload));
356 	memset(&data, 0, sizeof(data));
357 
358 	/* Read row */
359 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
360 	vcap_cache2entry(ocelot, vcap, &data);
361 	vcap_cache2action(ocelot, vcap, &data);
362 
363 	data.tg_sw = VCAP_TG_HALF;
364 	vcap_data_offset_get(vcap, &data, ix);
365 	data.tg = (data.tg & ~data.tg_mask);
366 	if (filter->prio != 0)
367 		data.tg |= data.tg_value;
368 
369 	data.type = IS2_ACTION_TYPE_NORMAL;
370 
371 	vcap_key_set(vcap, &data, VCAP_IS2_HK_PAG, filter->pag, 0xff);
372 	vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_FIRST,
373 			 (filter->lookup == 0) ? OCELOT_VCAP_BIT_1 :
374 			 OCELOT_VCAP_BIT_0);
375 	vcap_key_set(vcap, &data, VCAP_IS2_HK_IGR_PORT_MASK, 0,
376 		     ~filter->ingress_port_mask);
377 	vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_HOST_MATCH,
378 			 OCELOT_VCAP_BIT_ANY);
379 	vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_MC, filter->dmac_mc);
380 	vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L2_BC, filter->dmac_bc);
381 	vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_VLAN_TAGGED, tag->tagged);
382 	vcap_key_set(vcap, &data, VCAP_IS2_HK_VID,
383 		     tag->vid.value, tag->vid.mask);
384 	vcap_key_set(vcap, &data, VCAP_IS2_HK_PCP,
385 		     tag->pcp.value[0], tag->pcp.mask[0]);
386 	vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DEI, tag->dei);
387 
388 	switch (filter->key_type) {
389 	case OCELOT_VCAP_KEY_ETYPE: {
390 		struct ocelot_vcap_key_etype *etype = &filter->key.etype;
391 
392 		type = IS2_TYPE_ETYPE;
393 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
394 				   etype->dmac.value, etype->dmac.mask);
395 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
396 				   etype->smac.value, etype->smac.mask);
397 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_ETYPE,
398 				   etype->etype.value, etype->etype.mask);
399 		/* Clear unused bits */
400 		vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0,
401 			     0, 0);
402 		vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD1,
403 			     0, 0);
404 		vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD2,
405 			     0, 0);
406 		vcap_key_bytes_set(vcap, &data,
407 				   VCAP_IS2_HK_MAC_ETYPE_L2_PAYLOAD0,
408 				   etype->data.value, etype->data.mask);
409 		break;
410 	}
411 	case OCELOT_VCAP_KEY_LLC: {
412 		struct ocelot_vcap_key_llc *llc = &filter->key.llc;
413 
414 		type = IS2_TYPE_LLC;
415 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
416 				   llc->dmac.value, llc->dmac.mask);
417 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
418 				   llc->smac.value, llc->smac.mask);
419 		for (i = 0; i < 4; i++) {
420 			payload.value[i] = llc->llc.value[i];
421 			payload.mask[i] = llc->llc.mask[i];
422 		}
423 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_LLC_L2_LLC,
424 				   payload.value, payload.mask);
425 		break;
426 	}
427 	case OCELOT_VCAP_KEY_SNAP: {
428 		struct ocelot_vcap_key_snap *snap = &filter->key.snap;
429 
430 		type = IS2_TYPE_SNAP;
431 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_DMAC,
432 				   snap->dmac.value, snap->dmac.mask);
433 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L2_SMAC,
434 				   snap->smac.value, snap->smac.mask);
435 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_SNAP_L2_SNAP,
436 				   filter->key.snap.snap.value,
437 				   filter->key.snap.snap.mask);
438 		break;
439 	}
440 	case OCELOT_VCAP_KEY_ARP: {
441 		struct ocelot_vcap_key_arp *arp = &filter->key.arp;
442 
443 		type = IS2_TYPE_ARP;
444 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_SMAC,
445 				   arp->smac.value, arp->smac.mask);
446 		vcap_key_bit_set(vcap, &data,
447 				 VCAP_IS2_HK_MAC_ARP_ADDR_SPACE_OK,
448 				 arp->ethernet);
449 		vcap_key_bit_set(vcap, &data,
450 				 VCAP_IS2_HK_MAC_ARP_PROTO_SPACE_OK,
451 				 arp->ip);
452 		vcap_key_bit_set(vcap, &data,
453 				 VCAP_IS2_HK_MAC_ARP_LEN_OK,
454 				 arp->length);
455 		vcap_key_bit_set(vcap, &data,
456 				 VCAP_IS2_HK_MAC_ARP_TARGET_MATCH,
457 				 arp->dmac_match);
458 		vcap_key_bit_set(vcap, &data,
459 				 VCAP_IS2_HK_MAC_ARP_SENDER_MATCH,
460 				 arp->smac_match);
461 		vcap_key_bit_set(vcap, &data,
462 				 VCAP_IS2_HK_MAC_ARP_OPCODE_UNKNOWN,
463 				 arp->unknown);
464 
465 		/* OPCODE is inverse, bit 0 is reply flag, bit 1 is RARP flag */
466 		val = ((arp->req == OCELOT_VCAP_BIT_0 ? 1 : 0) |
467 		       (arp->arp == OCELOT_VCAP_BIT_0 ? 2 : 0));
468 		msk = ((arp->req == OCELOT_VCAP_BIT_ANY ? 0 : 1) |
469 		       (arp->arp == OCELOT_VCAP_BIT_ANY ? 0 : 2));
470 		vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_OPCODE,
471 			     val, msk);
472 		vcap_key_bytes_set(vcap, &data,
473 				   VCAP_IS2_HK_MAC_ARP_L3_IP4_DIP,
474 				   arp->dip.value.addr, arp->dip.mask.addr);
475 		vcap_key_bytes_set(vcap, &data,
476 				   VCAP_IS2_HK_MAC_ARP_L3_IP4_SIP,
477 				   arp->sip.value.addr, arp->sip.mask.addr);
478 		vcap_key_set(vcap, &data, VCAP_IS2_HK_MAC_ARP_DIP_EQ_SIP,
479 			     0, 0);
480 		break;
481 	}
482 	case OCELOT_VCAP_KEY_IPV4:
483 	case OCELOT_VCAP_KEY_IPV6: {
484 		enum ocelot_vcap_bit sip_eq_dip, sport_eq_dport, seq_zero, tcp;
485 		enum ocelot_vcap_bit ttl, fragment, options, tcp_ack, tcp_urg;
486 		enum ocelot_vcap_bit tcp_fin, tcp_syn, tcp_rst, tcp_psh;
487 		struct ocelot_vcap_key_ipv4 *ipv4 = NULL;
488 		struct ocelot_vcap_key_ipv6 *ipv6 = NULL;
489 		struct ocelot_vcap_udp_tcp *sport, *dport;
490 		struct ocelot_vcap_ipv4 sip, dip;
491 		struct ocelot_vcap_u8 proto, ds;
492 		struct ocelot_vcap_u48 *ip_data;
493 
494 		if (filter->key_type == OCELOT_VCAP_KEY_IPV4) {
495 			ipv4 = &filter->key.ipv4;
496 			ttl = ipv4->ttl;
497 			fragment = ipv4->fragment;
498 			options = ipv4->options;
499 			proto = ipv4->proto;
500 			ds = ipv4->ds;
501 			ip_data = &ipv4->data;
502 			sip = ipv4->sip;
503 			dip = ipv4->dip;
504 			sport = &ipv4->sport;
505 			dport = &ipv4->dport;
506 			tcp_fin = ipv4->tcp_fin;
507 			tcp_syn = ipv4->tcp_syn;
508 			tcp_rst = ipv4->tcp_rst;
509 			tcp_psh = ipv4->tcp_psh;
510 			tcp_ack = ipv4->tcp_ack;
511 			tcp_urg = ipv4->tcp_urg;
512 			sip_eq_dip = ipv4->sip_eq_dip;
513 			sport_eq_dport = ipv4->sport_eq_dport;
514 			seq_zero = ipv4->seq_zero;
515 		} else {
516 			ipv6 = &filter->key.ipv6;
517 			ttl = ipv6->ttl;
518 			fragment = OCELOT_VCAP_BIT_ANY;
519 			options = OCELOT_VCAP_BIT_ANY;
520 			proto = ipv6->proto;
521 			ds = ipv6->ds;
522 			ip_data = &ipv6->data;
523 			for (i = 0; i < 8; i++) {
524 				val = ipv6->sip.value[i + 8];
525 				msk = ipv6->sip.mask[i + 8];
526 				if (i < 4) {
527 					dip.value.addr[i] = val;
528 					dip.mask.addr[i] = msk;
529 				} else {
530 					sip.value.addr[i - 4] = val;
531 					sip.mask.addr[i - 4] = msk;
532 				}
533 			}
534 			sport = &ipv6->sport;
535 			dport = &ipv6->dport;
536 			tcp_fin = ipv6->tcp_fin;
537 			tcp_syn = ipv6->tcp_syn;
538 			tcp_rst = ipv6->tcp_rst;
539 			tcp_psh = ipv6->tcp_psh;
540 			tcp_ack = ipv6->tcp_ack;
541 			tcp_urg = ipv6->tcp_urg;
542 			sip_eq_dip = ipv6->sip_eq_dip;
543 			sport_eq_dport = ipv6->sport_eq_dport;
544 			seq_zero = ipv6->seq_zero;
545 		}
546 
547 		vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4,
548 				 ipv4 ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
549 		vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_FRAGMENT,
550 				 fragment);
551 		vcap_key_set(vcap, &data, VCAP_IS2_HK_L3_FRAG_OFS_GT0, 0, 0);
552 		vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L3_OPTIONS,
553 				 options);
554 		vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_IP4_L3_TTL_GT0,
555 				 ttl);
556 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_TOS,
557 				   ds.value, ds.mask);
558 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_DIP,
559 				   dip.value.addr, dip.mask.addr);
560 		vcap_key_bytes_set(vcap, &data, VCAP_IS2_HK_L3_IP4_SIP,
561 				   sip.value.addr, sip.mask.addr);
562 		vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_DIP_EQ_SIP,
563 				 sip_eq_dip);
564 		val = proto.value[0];
565 		msk = proto.mask[0];
566 		type = IS2_TYPE_IP_UDP_TCP;
567 		if (msk == 0xff && (val == IPPROTO_TCP || val == IPPROTO_UDP)) {
568 			/* UDP/TCP protocol match */
569 			tcp = (val == IPPROTO_TCP ?
570 			       OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
571 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_TCP, tcp);
572 			vcap_key_l4_port_set(vcap, &data,
573 					     VCAP_IS2_HK_L4_DPORT, dport);
574 			vcap_key_l4_port_set(vcap, &data,
575 					     VCAP_IS2_HK_L4_SPORT, sport);
576 			vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_RNG, 0, 0);
577 			vcap_key_bit_set(vcap, &data,
578 					 VCAP_IS2_HK_L4_SPORT_EQ_DPORT,
579 					 sport_eq_dport);
580 			vcap_key_bit_set(vcap, &data,
581 					 VCAP_IS2_HK_L4_SEQUENCE_EQ0,
582 					 seq_zero);
583 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_FIN,
584 					 tcp_fin);
585 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_SYN,
586 					 tcp_syn);
587 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_RST,
588 					 tcp_rst);
589 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_PSH,
590 					 tcp_psh);
591 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_ACK,
592 					 tcp_ack);
593 			vcap_key_bit_set(vcap, &data, VCAP_IS2_HK_L4_URG,
594 					 tcp_urg);
595 			vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_DOM,
596 				     0, 0);
597 			vcap_key_set(vcap, &data, VCAP_IS2_HK_L4_1588_VER,
598 				     0, 0);
599 		} else {
600 			if (msk == 0) {
601 				/* Any IP protocol match */
602 				type_mask = IS2_TYPE_MASK_IP_ANY;
603 			} else {
604 				/* Non-UDP/TCP protocol match */
605 				type = IS2_TYPE_IP_OTHER;
606 				for (i = 0; i < 6; i++) {
607 					payload.value[i] = ip_data->value[i];
608 					payload.mask[i] = ip_data->mask[i];
609 				}
610 			}
611 			vcap_key_bytes_set(vcap, &data,
612 					   VCAP_IS2_HK_IP4_L3_PROTO,
613 					   proto.value, proto.mask);
614 			vcap_key_bytes_set(vcap, &data,
615 					   VCAP_IS2_HK_L3_PAYLOAD,
616 					   payload.value, payload.mask);
617 		}
618 		break;
619 	}
620 	case OCELOT_VCAP_KEY_ANY:
621 	default:
622 		type = 0;
623 		type_mask = 0;
624 		count = vcap->entry_width / 2;
625 		/* Iterate over the non-common part of the key and
626 		 * clear entry data
627 		 */
628 		for (i = vcap->keys[VCAP_IS2_HK_L2_DMAC].offset;
629 		     i < count; i += ENTRY_WIDTH) {
630 			vcap_key_field_set(&data, i, min(32u, count - i), 0, 0);
631 		}
632 		break;
633 	}
634 
635 	vcap_key_set(vcap, &data, VCAP_IS2_TYPE, type, type_mask);
636 	is2_action_set(ocelot, &data, filter);
637 	vcap_data_set(data.counter, data.counter_offset,
638 		      vcap->counter_width, filter->stats.pkts);
639 
640 	/* Write row */
641 	vcap_entry2cache(ocelot, vcap, &data);
642 	vcap_action2cache(ocelot, vcap, &data);
643 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
644 }
645 
is1_action_set(struct ocelot * ocelot,struct vcap_data * data,const struct ocelot_vcap_filter * filter)646 static void is1_action_set(struct ocelot *ocelot, struct vcap_data *data,
647 			   const struct ocelot_vcap_filter *filter)
648 {
649 	const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1];
650 	const struct ocelot_vcap_action *a = &filter->action;
651 
652 	vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_REPLACE_ENA,
653 			a->vid_replace_ena);
654 	vcap_action_set(vcap, data, VCAP_IS1_ACT_VID_ADD_VAL, a->vid);
655 	vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT_ENA,
656 			a->vlan_pop_cnt_ena);
657 	vcap_action_set(vcap, data, VCAP_IS1_ACT_VLAN_POP_CNT,
658 			a->vlan_pop_cnt);
659 	vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_DEI_ENA, a->pcp_dei_ena);
660 	vcap_action_set(vcap, data, VCAP_IS1_ACT_PCP_VAL, a->pcp);
661 	vcap_action_set(vcap, data, VCAP_IS1_ACT_DEI_VAL, a->dei);
662 	vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_ENA, a->qos_ena);
663 	vcap_action_set(vcap, data, VCAP_IS1_ACT_QOS_VAL, a->qos_val);
664 	vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_OVERRIDE_MASK,
665 			a->pag_override_mask);
666 	vcap_action_set(vcap, data, VCAP_IS1_ACT_PAG_VAL, a->pag_val);
667 }
668 
is1_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)669 static void is1_entry_set(struct ocelot *ocelot, int ix,
670 			  struct ocelot_vcap_filter *filter)
671 {
672 	const struct vcap_props *vcap = &ocelot->vcap[VCAP_IS1];
673 	struct ocelot_vcap_key_vlan *tag = &filter->vlan;
674 	struct vcap_data data;
675 	int row = ix / 2;
676 	u32 type;
677 
678 	memset(&data, 0, sizeof(data));
679 
680 	/* Read row */
681 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
682 	vcap_cache2entry(ocelot, vcap, &data);
683 	vcap_cache2action(ocelot, vcap, &data);
684 
685 	data.tg_sw = VCAP_TG_HALF;
686 	data.type = IS1_ACTION_TYPE_NORMAL;
687 	vcap_data_offset_get(vcap, &data, ix);
688 	data.tg = (data.tg & ~data.tg_mask);
689 	if (filter->prio != 0)
690 		data.tg |= data.tg_value;
691 
692 	vcap_key_set(vcap, &data, VCAP_IS1_HK_LOOKUP, filter->lookup, 0x3);
693 	vcap_key_set(vcap, &data, VCAP_IS1_HK_IGR_PORT_MASK, 0,
694 		     ~filter->ingress_port_mask);
695 	vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_L2_MC, filter->dmac_mc);
696 	vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_L2_BC, filter->dmac_bc);
697 	vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_VLAN_TAGGED, tag->tagged);
698 	vcap_key_set(vcap, &data, VCAP_IS1_HK_VID,
699 		     tag->vid.value, tag->vid.mask);
700 	vcap_key_set(vcap, &data, VCAP_IS1_HK_PCP,
701 		     tag->pcp.value[0], tag->pcp.mask[0]);
702 	type = IS1_TYPE_S1_NORMAL;
703 
704 	switch (filter->key_type) {
705 	case OCELOT_VCAP_KEY_ETYPE: {
706 		struct ocelot_vcap_key_etype *etype = &filter->key.etype;
707 
708 		vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_L2_SMAC,
709 				   etype->smac.value, etype->smac.mask);
710 		vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_ETYPE,
711 				   etype->etype.value, etype->etype.mask);
712 		break;
713 	}
714 	case OCELOT_VCAP_KEY_IPV4: {
715 		struct ocelot_vcap_key_ipv4 *ipv4 = &filter->key.ipv4;
716 		struct ocelot_vcap_udp_tcp *sport = &ipv4->sport;
717 		struct ocelot_vcap_udp_tcp *dport = &ipv4->dport;
718 		enum ocelot_vcap_bit tcp_udp = OCELOT_VCAP_BIT_0;
719 		struct ocelot_vcap_u8 proto = ipv4->proto;
720 		struct ocelot_vcap_ipv4 sip = ipv4->sip;
721 		u32 val, msk;
722 
723 		vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_IP_SNAP,
724 				 OCELOT_VCAP_BIT_1);
725 		vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_IP4,
726 				 OCELOT_VCAP_BIT_1);
727 		vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_ETYPE_LEN,
728 				 OCELOT_VCAP_BIT_1);
729 		vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_L3_IP4_SIP,
730 				   sip.value.addr, sip.mask.addr);
731 
732 		val = proto.value[0];
733 		msk = proto.mask[0];
734 
735 		if ((val == NEXTHDR_TCP || val == NEXTHDR_UDP) && msk == 0xff)
736 			tcp_udp = OCELOT_VCAP_BIT_1;
737 		vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TCP_UDP, tcp_udp);
738 
739 		if (tcp_udp) {
740 			enum ocelot_vcap_bit tcp = OCELOT_VCAP_BIT_0;
741 
742 			if (val == NEXTHDR_TCP)
743 				tcp = OCELOT_VCAP_BIT_1;
744 
745 			vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TCP, tcp);
746 			vcap_key_l4_port_set(vcap, &data, VCAP_IS1_HK_L4_SPORT,
747 					     sport);
748 			/* Overloaded field */
749 			vcap_key_l4_port_set(vcap, &data, VCAP_IS1_HK_ETYPE,
750 					     dport);
751 		} else {
752 			/* IPv4 "other" frame */
753 			struct ocelot_vcap_u16 etype = {0};
754 
755 			/* Overloaded field */
756 			etype.value[0] = proto.value[0];
757 			etype.mask[0] = proto.mask[0];
758 
759 			vcap_key_bytes_set(vcap, &data, VCAP_IS1_HK_ETYPE,
760 					   etype.value, etype.mask);
761 		}
762 		break;
763 	}
764 	default:
765 		break;
766 	}
767 	vcap_key_bit_set(vcap, &data, VCAP_IS1_HK_TYPE,
768 			 type ? OCELOT_VCAP_BIT_1 : OCELOT_VCAP_BIT_0);
769 
770 	is1_action_set(ocelot, &data, filter);
771 	vcap_data_set(data.counter, data.counter_offset,
772 		      vcap->counter_width, filter->stats.pkts);
773 
774 	/* Write row */
775 	vcap_entry2cache(ocelot, vcap, &data);
776 	vcap_action2cache(ocelot, vcap, &data);
777 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
778 }
779 
es0_action_set(struct ocelot * ocelot,struct vcap_data * data,const struct ocelot_vcap_filter * filter)780 static void es0_action_set(struct ocelot *ocelot, struct vcap_data *data,
781 			   const struct ocelot_vcap_filter *filter)
782 {
783 	const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
784 	const struct ocelot_vcap_action *a = &filter->action;
785 
786 	vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_OUTER_TAG,
787 			a->push_outer_tag);
788 	vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_INNER_TAG,
789 			a->push_inner_tag);
790 	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_TPID_SEL,
791 			a->tag_a_tpid_sel);
792 	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_VID_SEL,
793 			a->tag_a_vid_sel);
794 	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_PCP_SEL,
795 			a->tag_a_pcp_sel);
796 	vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_A_VAL, a->vid_a_val);
797 	vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_A_VAL, a->pcp_a_val);
798 	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_TPID_SEL,
799 			a->tag_b_tpid_sel);
800 	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_VID_SEL,
801 			a->tag_b_vid_sel);
802 	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_PCP_SEL,
803 			a->tag_b_pcp_sel);
804 	vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_B_VAL, a->vid_b_val);
805 	vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_B_VAL, a->pcp_b_val);
806 }
807 
es0_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)808 static void es0_entry_set(struct ocelot *ocelot, int ix,
809 			  struct ocelot_vcap_filter *filter)
810 {
811 	const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
812 	struct ocelot_vcap_key_vlan *tag = &filter->vlan;
813 	struct vcap_data data;
814 	int row = ix;
815 
816 	memset(&data, 0, sizeof(data));
817 
818 	/* Read row */
819 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
820 	vcap_cache2entry(ocelot, vcap, &data);
821 	vcap_cache2action(ocelot, vcap, &data);
822 
823 	data.tg_sw = VCAP_TG_FULL;
824 	data.type = ES0_ACTION_TYPE_NORMAL;
825 	vcap_data_offset_get(vcap, &data, ix);
826 	data.tg = (data.tg & ~data.tg_mask);
827 	if (filter->prio != 0)
828 		data.tg |= data.tg_value;
829 
830 	vcap_key_set(vcap, &data, VCAP_ES0_IGR_PORT, filter->ingress_port.value,
831 		     filter->ingress_port.mask);
832 	vcap_key_set(vcap, &data, VCAP_ES0_EGR_PORT, filter->egress_port.value,
833 		     filter->egress_port.mask);
834 	vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_MC, filter->dmac_mc);
835 	vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_BC, filter->dmac_bc);
836 	vcap_key_set(vcap, &data, VCAP_ES0_VID,
837 		     tag->vid.value, tag->vid.mask);
838 	vcap_key_set(vcap, &data, VCAP_ES0_PCP,
839 		     tag->pcp.value[0], tag->pcp.mask[0]);
840 
841 	es0_action_set(ocelot, &data, filter);
842 	vcap_data_set(data.counter, data.counter_offset,
843 		      vcap->counter_width, filter->stats.pkts);
844 
845 	/* Write row */
846 	vcap_entry2cache(ocelot, vcap, &data);
847 	vcap_action2cache(ocelot, vcap, &data);
848 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
849 }
850 
vcap_entry_get(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)851 static void vcap_entry_get(struct ocelot *ocelot, int ix,
852 			   struct ocelot_vcap_filter *filter)
853 {
854 	const struct vcap_props *vcap = &ocelot->vcap[filter->block_id];
855 	struct vcap_data data;
856 	int row, count;
857 	u32 cnt;
858 
859 	if (filter->block_id == VCAP_ES0)
860 		data.tg_sw = VCAP_TG_FULL;
861 	else
862 		data.tg_sw = VCAP_TG_HALF;
863 
864 	count = (1 << (data.tg_sw - 1));
865 	row = (ix / count);
866 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_COUNTER);
867 	vcap_cache2action(ocelot, vcap, &data);
868 	vcap_data_offset_get(vcap, &data, ix);
869 	cnt = vcap_data_get(data.counter, data.counter_offset,
870 			    vcap->counter_width);
871 
872 	filter->stats.pkts = cnt;
873 }
874 
vcap_entry_set(struct ocelot * ocelot,int ix,struct ocelot_vcap_filter * filter)875 static void vcap_entry_set(struct ocelot *ocelot, int ix,
876 			   struct ocelot_vcap_filter *filter)
877 {
878 	if (filter->block_id == VCAP_IS1)
879 		return is1_entry_set(ocelot, ix, filter);
880 	if (filter->block_id == VCAP_IS2)
881 		return is2_entry_set(ocelot, ix, filter);
882 	if (filter->block_id == VCAP_ES0)
883 		return es0_entry_set(ocelot, ix, filter);
884 }
885 
886 struct vcap_policer_entry {
887 	struct list_head list;
888 	refcount_t refcount;
889 	u32 pol_ix;
890 };
891 
ocelot_vcap_policer_add(struct ocelot * ocelot,u32 pol_ix,struct ocelot_policer * pol)892 int ocelot_vcap_policer_add(struct ocelot *ocelot, u32 pol_ix,
893 			    struct ocelot_policer *pol)
894 {
895 	struct qos_policer_conf pp = { 0 };
896 	struct vcap_policer_entry *tmp;
897 	int ret;
898 
899 	if (!pol)
900 		return -EINVAL;
901 
902 	pp.mode = MSCC_QOS_RATE_MODE_DATA;
903 	pp.pir = pol->rate;
904 	pp.pbs = pol->burst;
905 
906 	list_for_each_entry(tmp, &ocelot->vcap_pol.pol_list, list)
907 		if (tmp->pol_ix == pol_ix) {
908 			refcount_inc(&tmp->refcount);
909 			return 0;
910 		}
911 
912 	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
913 	if (!tmp)
914 		return -ENOMEM;
915 
916 	ret = qos_policer_conf_set(ocelot, pol_ix, &pp);
917 	if (ret) {
918 		kfree(tmp);
919 		return ret;
920 	}
921 
922 	tmp->pol_ix = pol_ix;
923 	refcount_set(&tmp->refcount, 1);
924 	list_add_tail(&tmp->list, &ocelot->vcap_pol.pol_list);
925 
926 	return 0;
927 }
928 EXPORT_SYMBOL(ocelot_vcap_policer_add);
929 
ocelot_vcap_policer_del(struct ocelot * ocelot,u32 pol_ix)930 int ocelot_vcap_policer_del(struct ocelot *ocelot, u32 pol_ix)
931 {
932 	struct qos_policer_conf pp = {0};
933 	struct vcap_policer_entry *tmp, *n;
934 	u8 z = 0;
935 
936 	list_for_each_entry_safe(tmp, n, &ocelot->vcap_pol.pol_list, list)
937 		if (tmp->pol_ix == pol_ix) {
938 			z = refcount_dec_and_test(&tmp->refcount);
939 			if (z) {
940 				list_del(&tmp->list);
941 				kfree(tmp);
942 			}
943 		}
944 
945 	if (z) {
946 		pp.mode = MSCC_QOS_RATE_MODE_DISABLED;
947 		return qos_policer_conf_set(ocelot, pol_ix, &pp);
948 	}
949 
950 	return 0;
951 }
952 EXPORT_SYMBOL(ocelot_vcap_policer_del);
953 
954 static int
ocelot_vcap_filter_add_aux_resources(struct ocelot * ocelot,struct ocelot_vcap_filter * filter,struct netlink_ext_ack * extack)955 ocelot_vcap_filter_add_aux_resources(struct ocelot *ocelot,
956 				     struct ocelot_vcap_filter *filter,
957 				     struct netlink_ext_ack *extack)
958 {
959 	struct ocelot_mirror *m;
960 	int ret;
961 
962 	if (filter->block_id == VCAP_IS2 && filter->action.mirror_ena) {
963 		m = ocelot_mirror_get(ocelot, filter->egress_port.value,
964 				      extack);
965 		if (IS_ERR(m))
966 			return PTR_ERR(m);
967 	}
968 
969 	if (filter->block_id == VCAP_IS2 && filter->action.police_ena) {
970 		ret = ocelot_vcap_policer_add(ocelot, filter->action.pol_ix,
971 					      &filter->action.pol);
972 		if (ret)
973 			return ret;
974 	}
975 
976 	return 0;
977 }
978 
979 static void
ocelot_vcap_filter_del_aux_resources(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)980 ocelot_vcap_filter_del_aux_resources(struct ocelot *ocelot,
981 				     struct ocelot_vcap_filter *filter)
982 {
983 	if (filter->block_id == VCAP_IS2 && filter->action.police_ena)
984 		ocelot_vcap_policer_del(ocelot, filter->action.pol_ix);
985 
986 	if (filter->block_id == VCAP_IS2 && filter->action.mirror_ena)
987 		ocelot_mirror_put(ocelot);
988 }
989 
ocelot_vcap_filter_add_to_block(struct ocelot * ocelot,struct ocelot_vcap_block * block,struct ocelot_vcap_filter * filter,struct netlink_ext_ack * extack)990 static int ocelot_vcap_filter_add_to_block(struct ocelot *ocelot,
991 					   struct ocelot_vcap_block *block,
992 					   struct ocelot_vcap_filter *filter,
993 					   struct netlink_ext_ack *extack)
994 {
995 	struct list_head *pos = &block->rules;
996 	struct ocelot_vcap_filter *tmp;
997 	int ret;
998 
999 	ret = ocelot_vcap_filter_add_aux_resources(ocelot, filter, extack);
1000 	if (ret)
1001 		return ret;
1002 
1003 	block->count++;
1004 
1005 	list_for_each_entry(tmp, &block->rules, list) {
1006 		if (filter->prio < tmp->prio) {
1007 			pos = &tmp->list;
1008 			break;
1009 		}
1010 	}
1011 	list_add_tail(&filter->list, pos);
1012 
1013 	return 0;
1014 }
1015 
ocelot_vcap_filter_equal(const struct ocelot_vcap_filter * a,const struct ocelot_vcap_filter * b)1016 static bool ocelot_vcap_filter_equal(const struct ocelot_vcap_filter *a,
1017 				     const struct ocelot_vcap_filter *b)
1018 {
1019 	return !memcmp(&a->id, &b->id, sizeof(struct ocelot_vcap_id));
1020 }
1021 
ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block * block,struct ocelot_vcap_filter * filter)1022 static int ocelot_vcap_block_get_filter_index(struct ocelot_vcap_block *block,
1023 					      struct ocelot_vcap_filter *filter)
1024 {
1025 	struct ocelot_vcap_filter *tmp;
1026 	int index = 0;
1027 
1028 	list_for_each_entry(tmp, &block->rules, list) {
1029 		if (ocelot_vcap_filter_equal(filter, tmp))
1030 			return index;
1031 		index++;
1032 	}
1033 
1034 	return -ENOENT;
1035 }
1036 
1037 static struct ocelot_vcap_filter*
ocelot_vcap_block_find_filter_by_index(struct ocelot_vcap_block * block,int index)1038 ocelot_vcap_block_find_filter_by_index(struct ocelot_vcap_block *block,
1039 				       int index)
1040 {
1041 	struct ocelot_vcap_filter *tmp;
1042 	int i = 0;
1043 
1044 	list_for_each_entry(tmp, &block->rules, list) {
1045 		if (i == index)
1046 			return tmp;
1047 		++i;
1048 	}
1049 
1050 	return NULL;
1051 }
1052 
1053 struct ocelot_vcap_filter *
ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block * block,unsigned long cookie,bool tc_offload)1054 ocelot_vcap_block_find_filter_by_id(struct ocelot_vcap_block *block,
1055 				    unsigned long cookie, bool tc_offload)
1056 {
1057 	struct ocelot_vcap_filter *filter;
1058 
1059 	list_for_each_entry(filter, &block->rules, list)
1060 		if (filter->id.tc_offload == tc_offload &&
1061 		    filter->id.cookie == cookie)
1062 			return filter;
1063 
1064 	return NULL;
1065 }
1066 EXPORT_SYMBOL(ocelot_vcap_block_find_filter_by_id);
1067 
1068 /* If @on=false, then SNAP, ARP, IP and OAM frames will not match on keys based
1069  * on destination and source MAC addresses, but only on higher-level protocol
1070  * information. The only frame types to match on keys containing MAC addresses
1071  * in this case are non-SNAP, non-ARP, non-IP and non-OAM frames.
1072  *
1073  * If @on=true, then the above frame types (SNAP, ARP, IP and OAM) will match
1074  * on MAC_ETYPE keys such as destination and source MAC on this ingress port.
1075  * However the setting has the side effect of making these frames not matching
1076  * on any _other_ keys than MAC_ETYPE ones.
1077  */
ocelot_match_all_as_mac_etype(struct ocelot * ocelot,int port,int lookup,bool on)1078 static void ocelot_match_all_as_mac_etype(struct ocelot *ocelot, int port,
1079 					  int lookup, bool on)
1080 {
1081 	u32 val = 0;
1082 
1083 	if (on)
1084 		val = ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
1085 		      ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
1086 		      ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
1087 		      ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
1088 		      ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup));
1089 
1090 	ocelot_rmw_gix(ocelot, val,
1091 		       ANA_PORT_VCAP_S2_CFG_S2_SNAP_DIS(BIT(lookup)) |
1092 		       ANA_PORT_VCAP_S2_CFG_S2_ARP_DIS(BIT(lookup)) |
1093 		       ANA_PORT_VCAP_S2_CFG_S2_IP_TCPUDP_DIS(BIT(lookup)) |
1094 		       ANA_PORT_VCAP_S2_CFG_S2_IP_OTHER_DIS(BIT(lookup)) |
1095 		       ANA_PORT_VCAP_S2_CFG_S2_OAM_DIS(BIT(lookup)),
1096 		       ANA_PORT_VCAP_S2_CFG, port);
1097 }
1098 
1099 static bool
ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter * filter)1100 ocelot_vcap_is_problematic_mac_etype(struct ocelot_vcap_filter *filter)
1101 {
1102 	u16 proto, mask;
1103 
1104 	if (filter->key_type != OCELOT_VCAP_KEY_ETYPE)
1105 		return false;
1106 
1107 	proto = ntohs(*(__be16 *)filter->key.etype.etype.value);
1108 	mask = ntohs(*(__be16 *)filter->key.etype.etype.mask);
1109 
1110 	/* ETH_P_ALL match, so all protocols below are included */
1111 	if (mask == 0)
1112 		return true;
1113 	if (proto == ETH_P_ARP)
1114 		return true;
1115 	if (proto == ETH_P_IP)
1116 		return true;
1117 	if (proto == ETH_P_IPV6)
1118 		return true;
1119 
1120 	return false;
1121 }
1122 
1123 static bool
ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter * filter)1124 ocelot_vcap_is_problematic_non_mac_etype(struct ocelot_vcap_filter *filter)
1125 {
1126 	if (filter->key_type == OCELOT_VCAP_KEY_SNAP)
1127 		return true;
1128 	if (filter->key_type == OCELOT_VCAP_KEY_ARP)
1129 		return true;
1130 	if (filter->key_type == OCELOT_VCAP_KEY_IPV4)
1131 		return true;
1132 	if (filter->key_type == OCELOT_VCAP_KEY_IPV6)
1133 		return true;
1134 	return false;
1135 }
1136 
1137 static bool
ocelot_exclusive_mac_etype_filter_rules(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1138 ocelot_exclusive_mac_etype_filter_rules(struct ocelot *ocelot,
1139 					struct ocelot_vcap_filter *filter)
1140 {
1141 	struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1142 	struct ocelot_vcap_filter *tmp;
1143 	unsigned long port;
1144 	int i;
1145 
1146 	/* We only have the S2_IP_TCPUDP_DIS set of knobs for VCAP IS2 */
1147 	if (filter->block_id != VCAP_IS2)
1148 		return true;
1149 
1150 	if (ocelot_vcap_is_problematic_mac_etype(filter)) {
1151 		/* Search for any non-MAC_ETYPE rules on the port */
1152 		for (i = 0; i < block->count; i++) {
1153 			tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1154 			if (tmp->ingress_port_mask & filter->ingress_port_mask &&
1155 			    tmp->lookup == filter->lookup &&
1156 			    ocelot_vcap_is_problematic_non_mac_etype(tmp))
1157 				return false;
1158 		}
1159 
1160 		for_each_set_bit(port, &filter->ingress_port_mask,
1161 				 ocelot->num_phys_ports)
1162 			ocelot_match_all_as_mac_etype(ocelot, port,
1163 						      filter->lookup, true);
1164 	} else if (ocelot_vcap_is_problematic_non_mac_etype(filter)) {
1165 		/* Search for any MAC_ETYPE rules on the port */
1166 		for (i = 0; i < block->count; i++) {
1167 			tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1168 			if (tmp->ingress_port_mask & filter->ingress_port_mask &&
1169 			    tmp->lookup == filter->lookup &&
1170 			    ocelot_vcap_is_problematic_mac_etype(tmp))
1171 				return false;
1172 		}
1173 
1174 		for_each_set_bit(port, &filter->ingress_port_mask,
1175 				 ocelot->num_phys_ports)
1176 			ocelot_match_all_as_mac_etype(ocelot, port,
1177 						      filter->lookup, false);
1178 	}
1179 
1180 	return true;
1181 }
1182 
ocelot_vcap_filter_add(struct ocelot * ocelot,struct ocelot_vcap_filter * filter,struct netlink_ext_ack * extack)1183 int ocelot_vcap_filter_add(struct ocelot *ocelot,
1184 			   struct ocelot_vcap_filter *filter,
1185 			   struct netlink_ext_ack *extack)
1186 {
1187 	struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1188 	int i, index, ret;
1189 
1190 	if (!ocelot_exclusive_mac_etype_filter_rules(ocelot, filter)) {
1191 		NL_SET_ERR_MSG_MOD(extack,
1192 				   "Cannot mix MAC_ETYPE with non-MAC_ETYPE rules, use the other IS2 lookup");
1193 		return -EBUSY;
1194 	}
1195 
1196 	/* Add filter to the linked list */
1197 	ret = ocelot_vcap_filter_add_to_block(ocelot, block, filter, extack);
1198 	if (ret)
1199 		return ret;
1200 
1201 	/* Get the index of the inserted filter */
1202 	index = ocelot_vcap_block_get_filter_index(block, filter);
1203 	if (index < 0)
1204 		return index;
1205 
1206 	/* Move down the rules to make place for the new filter */
1207 	for (i = block->count - 1; i > index; i--) {
1208 		struct ocelot_vcap_filter *tmp;
1209 
1210 		tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1211 		/* Read back the filter's counters before moving it */
1212 		vcap_entry_get(ocelot, i - 1, tmp);
1213 		vcap_entry_set(ocelot, i, tmp);
1214 	}
1215 
1216 	/* Now insert the new filter */
1217 	vcap_entry_set(ocelot, index, filter);
1218 	return 0;
1219 }
1220 EXPORT_SYMBOL(ocelot_vcap_filter_add);
1221 
ocelot_vcap_block_remove_filter(struct ocelot * ocelot,struct ocelot_vcap_block * block,struct ocelot_vcap_filter * filter)1222 static void ocelot_vcap_block_remove_filter(struct ocelot *ocelot,
1223 					    struct ocelot_vcap_block *block,
1224 					    struct ocelot_vcap_filter *filter)
1225 {
1226 	struct ocelot_vcap_filter *tmp, *n;
1227 
1228 	list_for_each_entry_safe(tmp, n, &block->rules, list) {
1229 		if (ocelot_vcap_filter_equal(filter, tmp)) {
1230 			ocelot_vcap_filter_del_aux_resources(ocelot, tmp);
1231 			list_del(&tmp->list);
1232 			kfree(tmp);
1233 		}
1234 	}
1235 
1236 	block->count--;
1237 }
1238 
ocelot_vcap_filter_del(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1239 int ocelot_vcap_filter_del(struct ocelot *ocelot,
1240 			   struct ocelot_vcap_filter *filter)
1241 {
1242 	struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1243 	struct ocelot_vcap_filter del_filter;
1244 	int i, index;
1245 
1246 	/* Need to inherit the block_id so that vcap_entry_set()
1247 	 * does not get confused and knows where to install it.
1248 	 */
1249 	memset(&del_filter, 0, sizeof(del_filter));
1250 	del_filter.block_id = filter->block_id;
1251 
1252 	/* Gets index of the filter */
1253 	index = ocelot_vcap_block_get_filter_index(block, filter);
1254 	if (index < 0)
1255 		return index;
1256 
1257 	/* Delete filter */
1258 	ocelot_vcap_block_remove_filter(ocelot, block, filter);
1259 
1260 	/* Move up all the blocks over the deleted filter */
1261 	for (i = index; i < block->count; i++) {
1262 		struct ocelot_vcap_filter *tmp;
1263 
1264 		tmp = ocelot_vcap_block_find_filter_by_index(block, i);
1265 		/* Read back the filter's counters before moving it */
1266 		vcap_entry_get(ocelot, i + 1, tmp);
1267 		vcap_entry_set(ocelot, i, tmp);
1268 	}
1269 
1270 	/* Now delete the last filter, because it is duplicated */
1271 	vcap_entry_set(ocelot, block->count, &del_filter);
1272 
1273 	return 0;
1274 }
1275 EXPORT_SYMBOL(ocelot_vcap_filter_del);
1276 
ocelot_vcap_filter_replace(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1277 int ocelot_vcap_filter_replace(struct ocelot *ocelot,
1278 			       struct ocelot_vcap_filter *filter)
1279 {
1280 	struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1281 	int index;
1282 
1283 	index = ocelot_vcap_block_get_filter_index(block, filter);
1284 	if (index < 0)
1285 		return index;
1286 
1287 	vcap_entry_set(ocelot, index, filter);
1288 
1289 	return 0;
1290 }
1291 EXPORT_SYMBOL(ocelot_vcap_filter_replace);
1292 
ocelot_vcap_filter_stats_update(struct ocelot * ocelot,struct ocelot_vcap_filter * filter)1293 int ocelot_vcap_filter_stats_update(struct ocelot *ocelot,
1294 				    struct ocelot_vcap_filter *filter)
1295 {
1296 	struct ocelot_vcap_block *block = &ocelot->block[filter->block_id];
1297 	struct ocelot_vcap_filter tmp;
1298 	int index;
1299 
1300 	index = ocelot_vcap_block_get_filter_index(block, filter);
1301 	if (index < 0)
1302 		return index;
1303 
1304 	vcap_entry_get(ocelot, index, filter);
1305 
1306 	/* After we get the result we need to clear the counters */
1307 	tmp = *filter;
1308 	tmp.stats.pkts = 0;
1309 	vcap_entry_set(ocelot, index, &tmp);
1310 
1311 	return 0;
1312 }
1313 
ocelot_vcap_init_one(struct ocelot * ocelot,const struct vcap_props * vcap)1314 static void ocelot_vcap_init_one(struct ocelot *ocelot,
1315 				 const struct vcap_props *vcap)
1316 {
1317 	struct vcap_data data;
1318 
1319 	memset(&data, 0, sizeof(data));
1320 
1321 	vcap_entry2cache(ocelot, vcap, &data);
1322 	ocelot_target_write(ocelot, vcap->target, vcap->entry_count,
1323 			    VCAP_CORE_MV_CFG);
1324 	vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE, VCAP_SEL_ENTRY);
1325 
1326 	vcap_action2cache(ocelot, vcap, &data);
1327 	ocelot_target_write(ocelot, vcap->target, vcap->action_count,
1328 			    VCAP_CORE_MV_CFG);
1329 	vcap_cmd(ocelot, vcap, 0, VCAP_CMD_INITIALIZE,
1330 		 VCAP_SEL_ACTION | VCAP_SEL_COUNTER);
1331 }
1332 
ocelot_vcap_detect_constants(struct ocelot * ocelot,struct vcap_props * vcap)1333 static void ocelot_vcap_detect_constants(struct ocelot *ocelot,
1334 					 struct vcap_props *vcap)
1335 {
1336 	int counter_memory_width;
1337 	int num_default_actions;
1338 	int version;
1339 
1340 	version = ocelot_target_read(ocelot, vcap->target,
1341 				     VCAP_CONST_VCAP_VER);
1342 	/* Only version 0 VCAP supported for now */
1343 	if (WARN_ON(version != 0))
1344 		return;
1345 
1346 	/* Width in bits of type-group field */
1347 	vcap->tg_width = ocelot_target_read(ocelot, vcap->target,
1348 					    VCAP_CONST_ENTRY_TG_WIDTH);
1349 	/* Number of subwords per TCAM row */
1350 	vcap->sw_count = ocelot_target_read(ocelot, vcap->target,
1351 					    VCAP_CONST_ENTRY_SWCNT);
1352 	/* Number of rows in TCAM. There can be this many full keys, or double
1353 	 * this number half keys, or 4 times this number quarter keys.
1354 	 */
1355 	vcap->entry_count = ocelot_target_read(ocelot, vcap->target,
1356 					       VCAP_CONST_ENTRY_CNT);
1357 	/* Assuming there are 4 subwords per TCAM row, their layout in the
1358 	 * actual TCAM (not in the cache) would be:
1359 	 *
1360 	 * |  SW 3  | TG 3 |  SW 2  | TG 2 |  SW 1  | TG 1 |  SW 0  | TG 0 |
1361 	 *
1362 	 * (where SW=subword and TG=Type-Group).
1363 	 *
1364 	 * What VCAP_CONST_ENTRY_CNT is giving us is the width of one full TCAM
1365 	 * row. But when software accesses the TCAM through the cache
1366 	 * registers, the Type-Group values are written through another set of
1367 	 * registers VCAP_TG_DAT, and therefore, it appears as though the 4
1368 	 * subwords are contiguous in the cache memory.
1369 	 * Important mention: regardless of the number of key entries per row
1370 	 * (and therefore of key size: 1 full key or 2 half keys or 4 quarter
1371 	 * keys), software always has to configure 4 Type-Group values. For
1372 	 * example, in the case of 1 full key, the driver needs to set all 4
1373 	 * Type-Group to be full key.
1374 	 *
1375 	 * For this reason, we need to fix up the value that the hardware is
1376 	 * giving us. We don't actually care about the width of the entry in
1377 	 * the TCAM. What we care about is the width of the entry in the cache
1378 	 * registers, which is how we get to interact with it. And since the
1379 	 * VCAP_ENTRY_DAT cache registers access only the subwords and not the
1380 	 * Type-Groups, this means we need to subtract the width of the
1381 	 * Type-Groups when packing and unpacking key entry data in a TCAM row.
1382 	 */
1383 	vcap->entry_width = ocelot_target_read(ocelot, vcap->target,
1384 					       VCAP_CONST_ENTRY_WIDTH);
1385 	vcap->entry_width -= vcap->tg_width * vcap->sw_count;
1386 	num_default_actions = ocelot_target_read(ocelot, vcap->target,
1387 						 VCAP_CONST_ACTION_DEF_CNT);
1388 	vcap->action_count = vcap->entry_count + num_default_actions;
1389 	vcap->action_width = ocelot_target_read(ocelot, vcap->target,
1390 						VCAP_CONST_ACTION_WIDTH);
1391 	/* The width of the counter memory, this is the complete width of all
1392 	 * counter-fields associated with one full-word entry. There is one
1393 	 * counter per entry sub-word (see CAP_CORE::ENTRY_SWCNT for number of
1394 	 * subwords.)
1395 	 */
1396 	vcap->counter_words = vcap->sw_count;
1397 	counter_memory_width = ocelot_target_read(ocelot, vcap->target,
1398 						  VCAP_CONST_CNT_WIDTH);
1399 	vcap->counter_width = counter_memory_width / vcap->counter_words;
1400 }
1401 
ocelot_vcap_init(struct ocelot * ocelot)1402 int ocelot_vcap_init(struct ocelot *ocelot)
1403 {
1404 	struct qos_policer_conf cpu_drop = {
1405 		.mode = MSCC_QOS_RATE_MODE_DATA,
1406 	};
1407 	int ret, i;
1408 
1409 	/* Create a policer that will drop the frames for the cpu.
1410 	 * This policer will be used as action in the acl rules to drop
1411 	 * frames.
1412 	 */
1413 	ret = qos_policer_conf_set(ocelot, OCELOT_POLICER_DISCARD, &cpu_drop);
1414 	if (ret)
1415 		return ret;
1416 
1417 	for (i = 0; i < OCELOT_NUM_VCAP_BLOCKS; i++) {
1418 		struct ocelot_vcap_block *block = &ocelot->block[i];
1419 		struct vcap_props *vcap = &ocelot->vcap[i];
1420 
1421 		INIT_LIST_HEAD(&block->rules);
1422 
1423 		ocelot_vcap_detect_constants(ocelot, vcap);
1424 		ocelot_vcap_init_one(ocelot, vcap);
1425 	}
1426 
1427 	INIT_LIST_HEAD(&ocelot->dummy_rules);
1428 	INIT_LIST_HEAD(&ocelot->traps);
1429 	INIT_LIST_HEAD(&ocelot->vcap_pol.pol_list);
1430 
1431 	return 0;
1432 }
1433