1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /* Copyright 2019 NXP */
3 
4 #include "enetc.h"
5 
6 #include <net/pkt_sched.h>
7 #include <linux/math64.h>
8 #include <linux/refcount.h>
9 #include <net/pkt_cls.h>
10 #include <net/tc_act/tc_gate.h>
11 
enetc_get_max_gcl_len(struct enetc_hw * hw)12 static u16 enetc_get_max_gcl_len(struct enetc_hw *hw)
13 {
14 	return enetc_rd(hw, ENETC_PTGCAPR) & ENETC_PTGCAPR_MAX_GCL_LEN_MASK;
15 }
16 
enetc_sched_speed_set(struct enetc_ndev_priv * priv,int speed)17 void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed)
18 {
19 	struct enetc_hw *hw = &priv->si->hw;
20 	u32 old_speed = priv->speed;
21 	u32 pspeed, tmp;
22 
23 	if (speed == old_speed)
24 		return;
25 
26 	switch (speed) {
27 	case SPEED_1000:
28 		pspeed = ENETC_PMR_PSPEED_1000M;
29 		break;
30 	case SPEED_2500:
31 		pspeed = ENETC_PMR_PSPEED_2500M;
32 		break;
33 	case SPEED_100:
34 		pspeed = ENETC_PMR_PSPEED_100M;
35 		break;
36 	case SPEED_10:
37 	default:
38 		pspeed = ENETC_PMR_PSPEED_10M;
39 	}
40 
41 	priv->speed = speed;
42 	tmp = enetc_port_rd(hw, ENETC_PMR);
43 	enetc_port_wr(hw, ENETC_PMR, (tmp & ~ENETC_PMR_PSPEED_MASK) | pspeed);
44 }
45 
enetc_setup_taprio(struct enetc_ndev_priv * priv,struct tc_taprio_qopt_offload * admin_conf)46 static int enetc_setup_taprio(struct enetc_ndev_priv *priv,
47 			      struct tc_taprio_qopt_offload *admin_conf)
48 {
49 	struct enetc_hw *hw = &priv->si->hw;
50 	struct enetc_cbd cbd = {.cmd = 0};
51 	struct tgs_gcl_conf *gcl_config;
52 	struct tgs_gcl_data *gcl_data;
53 	dma_addr_t dma;
54 	struct gce *gce;
55 	u16 data_size;
56 	u16 gcl_len;
57 	void *tmp;
58 	u32 tge;
59 	int err;
60 	int i;
61 
62 	/* TSD and Qbv are mutually exclusive in hardware */
63 	for (i = 0; i < priv->num_tx_rings; i++)
64 		if (priv->tx_ring[i]->tsd_enable)
65 			return -EBUSY;
66 
67 	if (admin_conf->num_entries > enetc_get_max_gcl_len(hw))
68 		return -EINVAL;
69 
70 	if (admin_conf->cycle_time > U32_MAX ||
71 	    admin_conf->cycle_time_extension > U32_MAX)
72 		return -EINVAL;
73 
74 	/* Configure the (administrative) gate control list using the
75 	 * control BD descriptor.
76 	 */
77 	gcl_config = &cbd.gcl_conf;
78 	gcl_len = admin_conf->num_entries;
79 
80 	data_size = struct_size(gcl_data, entry, gcl_len);
81 	tmp = enetc_cbd_alloc_data_mem(priv->si, &cbd, data_size,
82 				       &dma, (void *)&gcl_data);
83 	if (!tmp)
84 		return -ENOMEM;
85 
86 	gce = (struct gce *)(gcl_data + 1);
87 
88 	/* Set all gates open as default */
89 	gcl_config->atc = 0xff;
90 	gcl_config->acl_len = cpu_to_le16(gcl_len);
91 
92 	gcl_data->btl = cpu_to_le32(lower_32_bits(admin_conf->base_time));
93 	gcl_data->bth = cpu_to_le32(upper_32_bits(admin_conf->base_time));
94 	gcl_data->ct = cpu_to_le32(admin_conf->cycle_time);
95 	gcl_data->cte = cpu_to_le32(admin_conf->cycle_time_extension);
96 
97 	for (i = 0; i < gcl_len; i++) {
98 		struct tc_taprio_sched_entry *temp_entry;
99 		struct gce *temp_gce = gce + i;
100 
101 		temp_entry = &admin_conf->entries[i];
102 
103 		temp_gce->gate = (u8)temp_entry->gate_mask;
104 		temp_gce->period = cpu_to_le32(temp_entry->interval);
105 	}
106 
107 	cbd.status_flags = 0;
108 
109 	cbd.cls = BDCR_CMD_PORT_GCL;
110 	cbd.status_flags = 0;
111 
112 	tge = enetc_rd(hw, ENETC_PTGCR);
113 	enetc_wr(hw, ENETC_PTGCR, tge | ENETC_PTGCR_TGE);
114 
115 	err = enetc_send_cmd(priv->si, &cbd);
116 	if (err)
117 		enetc_wr(hw, ENETC_PTGCR, tge & ~ENETC_PTGCR_TGE);
118 
119 	enetc_cbd_free_data_mem(priv->si, data_size, tmp, &dma);
120 
121 	if (err)
122 		return err;
123 
124 	enetc_set_ptcmsdur(hw, admin_conf->max_sdu);
125 	priv->active_offloads |= ENETC_F_QBV;
126 
127 	return 0;
128 }
129 
enetc_reset_taprio_stats(struct enetc_ndev_priv * priv)130 static void enetc_reset_taprio_stats(struct enetc_ndev_priv *priv)
131 {
132 	int i;
133 
134 	for (i = 0; i < priv->num_tx_rings; i++)
135 		priv->tx_ring[i]->stats.win_drop = 0;
136 }
137 
enetc_reset_taprio(struct enetc_ndev_priv * priv)138 static void enetc_reset_taprio(struct enetc_ndev_priv *priv)
139 {
140 	struct enetc_hw *hw = &priv->si->hw;
141 	u32 val;
142 
143 	val = enetc_rd(hw, ENETC_PTGCR);
144 	enetc_wr(hw, ENETC_PTGCR, val & ~ENETC_PTGCR_TGE);
145 	enetc_reset_ptcmsdur(hw);
146 
147 	priv->active_offloads &= ~ENETC_F_QBV;
148 }
149 
enetc_taprio_destroy(struct net_device * ndev)150 static void enetc_taprio_destroy(struct net_device *ndev)
151 {
152 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
153 
154 	enetc_reset_taprio(priv);
155 	enetc_reset_tc_mqprio(ndev);
156 	enetc_reset_taprio_stats(priv);
157 }
158 
enetc_taprio_stats(struct net_device * ndev,struct tc_taprio_qopt_stats * stats)159 static void enetc_taprio_stats(struct net_device *ndev,
160 			       struct tc_taprio_qopt_stats *stats)
161 {
162 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
163 	u64 window_drops = 0;
164 	int i;
165 
166 	for (i = 0; i < priv->num_tx_rings; i++)
167 		window_drops += priv->tx_ring[i]->stats.win_drop;
168 
169 	stats->window_drops = window_drops;
170 }
171 
enetc_taprio_queue_stats(struct net_device * ndev,struct tc_taprio_qopt_queue_stats * queue_stats)172 static void enetc_taprio_queue_stats(struct net_device *ndev,
173 				     struct tc_taprio_qopt_queue_stats *queue_stats)
174 {
175 	struct tc_taprio_qopt_stats *stats = &queue_stats->stats;
176 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
177 	int queue = queue_stats->queue;
178 
179 	stats->window_drops = priv->tx_ring[queue]->stats.win_drop;
180 }
181 
enetc_taprio_replace(struct net_device * ndev,struct tc_taprio_qopt_offload * offload)182 static int enetc_taprio_replace(struct net_device *ndev,
183 				struct tc_taprio_qopt_offload *offload)
184 {
185 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
186 	int err;
187 
188 	err = enetc_setup_tc_mqprio(ndev, &offload->mqprio);
189 	if (err)
190 		return err;
191 
192 	err = enetc_setup_taprio(priv, offload);
193 	if (err)
194 		enetc_reset_tc_mqprio(ndev);
195 
196 	return err;
197 }
198 
enetc_setup_tc_taprio(struct net_device * ndev,void * type_data)199 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data)
200 {
201 	struct tc_taprio_qopt_offload *offload = type_data;
202 	int err = 0;
203 
204 	switch (offload->cmd) {
205 	case TAPRIO_CMD_REPLACE:
206 		err = enetc_taprio_replace(ndev, offload);
207 		break;
208 	case TAPRIO_CMD_DESTROY:
209 		enetc_taprio_destroy(ndev);
210 		break;
211 	case TAPRIO_CMD_STATS:
212 		enetc_taprio_stats(ndev, &offload->stats);
213 		break;
214 	case TAPRIO_CMD_QUEUE_STATS:
215 		enetc_taprio_queue_stats(ndev, &offload->queue_stats);
216 		break;
217 	default:
218 		err = -EOPNOTSUPP;
219 	}
220 
221 	return err;
222 }
223 
enetc_get_cbs_enable(struct enetc_hw * hw,u8 tc)224 static u32 enetc_get_cbs_enable(struct enetc_hw *hw, u8 tc)
225 {
226 	return enetc_port_rd(hw, ENETC_PTCCBSR0(tc)) & ENETC_CBSE;
227 }
228 
enetc_get_cbs_bw(struct enetc_hw * hw,u8 tc)229 static u8 enetc_get_cbs_bw(struct enetc_hw *hw, u8 tc)
230 {
231 	return enetc_port_rd(hw, ENETC_PTCCBSR0(tc)) & ENETC_CBS_BW_MASK;
232 }
233 
enetc_setup_tc_cbs(struct net_device * ndev,void * type_data)234 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data)
235 {
236 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
237 	struct tc_cbs_qopt_offload *cbs = type_data;
238 	u32 port_transmit_rate = priv->speed;
239 	u8 tc_nums = netdev_get_num_tc(ndev);
240 	struct enetc_hw *hw = &priv->si->hw;
241 	u32 hi_credit_bit, hi_credit_reg;
242 	u32 max_interference_size;
243 	u32 port_frame_max_size;
244 	u8 tc = cbs->queue;
245 	u8 prio_top, prio_next;
246 	int bw_sum = 0;
247 	u8 bw;
248 
249 	prio_top = tc_nums - 1;
250 	prio_next = tc_nums - 2;
251 
252 	/* Support highest prio and second prio tc in cbs mode */
253 	if (tc != prio_top && tc != prio_next)
254 		return -EOPNOTSUPP;
255 
256 	if (!cbs->enable) {
257 		/* Make sure the other TC that are numerically
258 		 * lower than this TC have been disabled.
259 		 */
260 		if (tc == prio_top &&
261 		    enetc_get_cbs_enable(hw, prio_next)) {
262 			dev_err(&ndev->dev,
263 				"Disable TC%d before disable TC%d\n",
264 				prio_next, tc);
265 			return -EINVAL;
266 		}
267 
268 		enetc_port_wr(hw, ENETC_PTCCBSR1(tc), 0);
269 		enetc_port_wr(hw, ENETC_PTCCBSR0(tc), 0);
270 
271 		return 0;
272 	}
273 
274 	if (cbs->idleslope - cbs->sendslope != port_transmit_rate * 1000L ||
275 	    cbs->idleslope < 0 || cbs->sendslope > 0)
276 		return -EOPNOTSUPP;
277 
278 	port_frame_max_size = ndev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
279 
280 	bw = cbs->idleslope / (port_transmit_rate * 10UL);
281 
282 	/* Make sure the other TC that are numerically
283 	 * higher than this TC have been enabled.
284 	 */
285 	if (tc == prio_next) {
286 		if (!enetc_get_cbs_enable(hw, prio_top)) {
287 			dev_err(&ndev->dev,
288 				"Enable TC%d first before enable TC%d\n",
289 				prio_top, prio_next);
290 			return -EINVAL;
291 		}
292 		bw_sum += enetc_get_cbs_bw(hw, prio_top);
293 	}
294 
295 	if (bw_sum + bw >= 100) {
296 		dev_err(&ndev->dev,
297 			"The sum of all CBS Bandwidth can't exceed 100\n");
298 		return -EINVAL;
299 	}
300 
301 	enetc_port_rd(hw, ENETC_PTCMSDUR(tc));
302 
303 	/* For top prio TC, the max_interfrence_size is maxSizedFrame.
304 	 *
305 	 * For next prio TC, the max_interfrence_size is calculated as below:
306 	 *
307 	 *      max_interference_size = M0 + Ma + Ra * M0 / (R0 - Ra)
308 	 *
309 	 *	- RA: idleSlope for AVB Class A
310 	 *	- R0: port transmit rate
311 	 *	- M0: maximum sized frame for the port
312 	 *	- MA: maximum sized frame for AVB Class A
313 	 */
314 
315 	if (tc == prio_top) {
316 		max_interference_size = port_frame_max_size * 8;
317 	} else {
318 		u32 m0, ma, r0, ra;
319 
320 		m0 = port_frame_max_size * 8;
321 		ma = enetc_port_rd(hw, ENETC_PTCMSDUR(prio_top)) * 8;
322 		ra = enetc_get_cbs_bw(hw, prio_top) *
323 			port_transmit_rate * 10000ULL;
324 		r0 = port_transmit_rate * 1000000ULL;
325 		max_interference_size = m0 + ma +
326 			(u32)div_u64((u64)ra * m0, r0 - ra);
327 	}
328 
329 	/* hiCredit bits calculate by:
330 	 *
331 	 * maxSizedFrame * (idleSlope/portTxRate)
332 	 */
333 	hi_credit_bit = max_interference_size * bw / 100;
334 
335 	/* hiCredit bits to hiCredit register need to calculated as:
336 	 *
337 	 * (enetClockFrequency / portTransmitRate) * 100
338 	 */
339 	hi_credit_reg = (u32)div_u64((ENETC_CLK * 100ULL) * hi_credit_bit,
340 				     port_transmit_rate * 1000000ULL);
341 
342 	enetc_port_wr(hw, ENETC_PTCCBSR1(tc), hi_credit_reg);
343 
344 	/* Set bw register and enable this traffic class */
345 	enetc_port_wr(hw, ENETC_PTCCBSR0(tc), bw | ENETC_CBSE);
346 
347 	return 0;
348 }
349 
enetc_setup_tc_txtime(struct net_device * ndev,void * type_data)350 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data)
351 {
352 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
353 	struct tc_etf_qopt_offload *qopt = type_data;
354 	u8 tc_nums = netdev_get_num_tc(ndev);
355 	struct enetc_hw *hw = &priv->si->hw;
356 	int tc;
357 
358 	if (!tc_nums)
359 		return -EOPNOTSUPP;
360 
361 	tc = qopt->queue;
362 
363 	if (tc < 0 || tc >= priv->num_tx_rings)
364 		return -EINVAL;
365 
366 	/* TSD and Qbv are mutually exclusive in hardware */
367 	if (enetc_rd(hw, ENETC_PTGCR) & ENETC_PTGCR_TGE)
368 		return -EBUSY;
369 
370 	priv->tx_ring[tc]->tsd_enable = qopt->enable;
371 	enetc_port_wr(hw, ENETC_PTCTSDR(tc), qopt->enable ? ENETC_TSDE : 0);
372 
373 	return 0;
374 }
375 
376 enum streamid_type {
377 	STREAMID_TYPE_RESERVED = 0,
378 	STREAMID_TYPE_NULL,
379 	STREAMID_TYPE_SMAC,
380 };
381 
382 enum streamid_vlan_tagged {
383 	STREAMID_VLAN_RESERVED = 0,
384 	STREAMID_VLAN_TAGGED,
385 	STREAMID_VLAN_UNTAGGED,
386 	STREAMID_VLAN_ALL,
387 };
388 
389 #define ENETC_PSFP_WILDCARD -1
390 #define HANDLE_OFFSET 100
391 
392 enum forward_type {
393 	FILTER_ACTION_TYPE_PSFP = BIT(0),
394 	FILTER_ACTION_TYPE_ACL = BIT(1),
395 	FILTER_ACTION_TYPE_BOTH = GENMASK(1, 0),
396 };
397 
398 /* This is for limit output type for input actions */
399 struct actions_fwd {
400 	u64 actions;
401 	u64 keys;	/* include the must needed keys */
402 	enum forward_type output;
403 };
404 
405 struct psfp_streamfilter_counters {
406 	u64 matching_frames_count;
407 	u64 passing_frames_count;
408 	u64 not_passing_frames_count;
409 	u64 passing_sdu_count;
410 	u64 not_passing_sdu_count;
411 	u64 red_frames_count;
412 };
413 
414 struct enetc_streamid {
415 	u32 index;
416 	union {
417 		u8 src_mac[6];
418 		u8 dst_mac[6];
419 	};
420 	u8 filtertype;
421 	u16 vid;
422 	u8 tagged;
423 	s32 handle;
424 };
425 
426 struct enetc_psfp_filter {
427 	u32 index;
428 	s32 handle;
429 	s8 prio;
430 	u32 maxsdu;
431 	u32 gate_id;
432 	s32 meter_id;
433 	refcount_t refcount;
434 	struct hlist_node node;
435 };
436 
437 struct enetc_psfp_gate {
438 	u32 index;
439 	s8 init_ipv;
440 	u64 basetime;
441 	u64 cycletime;
442 	u64 cycletimext;
443 	u32 num_entries;
444 	refcount_t refcount;
445 	struct hlist_node node;
446 	struct action_gate_entry entries[];
447 };
448 
449 /* Only enable the green color frame now
450  * Will add eir and ebs color blind, couple flag etc when
451  * policing action add more offloading parameters
452  */
453 struct enetc_psfp_meter {
454 	u32 index;
455 	u32 cir;
456 	u32 cbs;
457 	refcount_t refcount;
458 	struct hlist_node node;
459 };
460 
461 #define ENETC_PSFP_FLAGS_FMI BIT(0)
462 
463 struct enetc_stream_filter {
464 	struct enetc_streamid sid;
465 	u32 sfi_index;
466 	u32 sgi_index;
467 	u32 flags;
468 	u32 fmi_index;
469 	struct flow_stats stats;
470 	struct hlist_node node;
471 };
472 
473 struct enetc_psfp {
474 	unsigned long dev_bitmap;
475 	unsigned long *psfp_sfi_bitmap;
476 	struct hlist_head stream_list;
477 	struct hlist_head psfp_filter_list;
478 	struct hlist_head psfp_gate_list;
479 	struct hlist_head psfp_meter_list;
480 	spinlock_t psfp_lock; /* spinlock for the struct enetc_psfp r/w */
481 };
482 
483 static struct actions_fwd enetc_act_fwd[] = {
484 	{
485 		BIT(FLOW_ACTION_GATE),
486 		BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS),
487 		FILTER_ACTION_TYPE_PSFP
488 	},
489 	{
490 		BIT(FLOW_ACTION_POLICE) |
491 		BIT(FLOW_ACTION_GATE),
492 		BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS),
493 		FILTER_ACTION_TYPE_PSFP
494 	},
495 	/* example for ACL actions */
496 	{
497 		BIT(FLOW_ACTION_DROP),
498 		0,
499 		FILTER_ACTION_TYPE_ACL
500 	}
501 };
502 
503 static struct enetc_psfp epsfp = {
504 	.dev_bitmap = 0,
505 	.psfp_sfi_bitmap = NULL,
506 };
507 
508 static LIST_HEAD(enetc_block_cb_list);
509 
510 /* Stream Identity Entry Set Descriptor */
enetc_streamid_hw_set(struct enetc_ndev_priv * priv,struct enetc_streamid * sid,u8 enable)511 static int enetc_streamid_hw_set(struct enetc_ndev_priv *priv,
512 				 struct enetc_streamid *sid,
513 				 u8 enable)
514 {
515 	struct enetc_cbd cbd = {.cmd = 0};
516 	struct streamid_data *si_data;
517 	struct streamid_conf *si_conf;
518 	dma_addr_t dma;
519 	u16 data_size;
520 	void *tmp;
521 	int port;
522 	int err;
523 
524 	port = enetc_pf_to_port(priv->si->pdev);
525 	if (port < 0)
526 		return -EINVAL;
527 
528 	if (sid->index >= priv->psfp_cap.max_streamid)
529 		return -EINVAL;
530 
531 	if (sid->filtertype != STREAMID_TYPE_NULL &&
532 	    sid->filtertype != STREAMID_TYPE_SMAC)
533 		return -EOPNOTSUPP;
534 
535 	/* Disable operation before enable */
536 	cbd.index = cpu_to_le16((u16)sid->index);
537 	cbd.cls = BDCR_CMD_STREAM_IDENTIFY;
538 	cbd.status_flags = 0;
539 
540 	data_size = sizeof(struct streamid_data);
541 	tmp = enetc_cbd_alloc_data_mem(priv->si, &cbd, data_size,
542 				       &dma, (void *)&si_data);
543 	if (!tmp)
544 		return -ENOMEM;
545 
546 	eth_broadcast_addr(si_data->dmac);
547 	si_data->vid_vidm_tg = (ENETC_CBDR_SID_VID_MASK
548 			       + ((0x3 << 14) | ENETC_CBDR_SID_VIDM));
549 
550 	si_conf = &cbd.sid_set;
551 	/* Only one port supported for one entry, set itself */
552 	si_conf->iports = cpu_to_le32(1 << port);
553 	si_conf->id_type = 1;
554 	si_conf->oui[2] = 0x0;
555 	si_conf->oui[1] = 0x80;
556 	si_conf->oui[0] = 0xC2;
557 
558 	err = enetc_send_cmd(priv->si, &cbd);
559 	if (err)
560 		goto out;
561 
562 	if (!enable)
563 		goto out;
564 
565 	/* Enable the entry overwrite again incase space flushed by hardware */
566 	cbd.status_flags = 0;
567 
568 	si_conf->en = 0x80;
569 	si_conf->stream_handle = cpu_to_le32(sid->handle);
570 	si_conf->iports = cpu_to_le32(1 << port);
571 	si_conf->id_type = sid->filtertype;
572 	si_conf->oui[2] = 0x0;
573 	si_conf->oui[1] = 0x80;
574 	si_conf->oui[0] = 0xC2;
575 
576 	memset(si_data, 0, data_size);
577 
578 	/* VIDM default to be 1.
579 	 * VID Match. If set (b1) then the VID must match, otherwise
580 	 * any VID is considered a match. VIDM setting is only used
581 	 * when TG is set to b01.
582 	 */
583 	if (si_conf->id_type == STREAMID_TYPE_NULL) {
584 		ether_addr_copy(si_data->dmac, sid->dst_mac);
585 		si_data->vid_vidm_tg = (sid->vid & ENETC_CBDR_SID_VID_MASK) +
586 				       ((((u16)(sid->tagged) & 0x3) << 14)
587 				       | ENETC_CBDR_SID_VIDM);
588 	} else if (si_conf->id_type == STREAMID_TYPE_SMAC) {
589 		ether_addr_copy(si_data->smac, sid->src_mac);
590 		si_data->vid_vidm_tg = (sid->vid & ENETC_CBDR_SID_VID_MASK) +
591 				       ((((u16)(sid->tagged) & 0x3) << 14)
592 				       | ENETC_CBDR_SID_VIDM);
593 	}
594 
595 	err = enetc_send_cmd(priv->si, &cbd);
596 out:
597 	enetc_cbd_free_data_mem(priv->si, data_size, tmp, &dma);
598 
599 	return err;
600 }
601 
602 /* Stream Filter Instance Set Descriptor */
enetc_streamfilter_hw_set(struct enetc_ndev_priv * priv,struct enetc_psfp_filter * sfi,u8 enable)603 static int enetc_streamfilter_hw_set(struct enetc_ndev_priv *priv,
604 				     struct enetc_psfp_filter *sfi,
605 				     u8 enable)
606 {
607 	struct enetc_cbd cbd = {.cmd = 0};
608 	struct sfi_conf *sfi_config;
609 	int port;
610 
611 	port = enetc_pf_to_port(priv->si->pdev);
612 	if (port < 0)
613 		return -EINVAL;
614 
615 	cbd.index = cpu_to_le16(sfi->index);
616 	cbd.cls = BDCR_CMD_STREAM_FILTER;
617 	cbd.status_flags = 0x80;
618 	cbd.length = cpu_to_le16(1);
619 
620 	sfi_config = &cbd.sfi_conf;
621 	if (!enable)
622 		goto exit;
623 
624 	sfi_config->en = 0x80;
625 
626 	if (sfi->handle >= 0) {
627 		sfi_config->stream_handle =
628 			cpu_to_le32(sfi->handle);
629 		sfi_config->sthm |= 0x80;
630 	}
631 
632 	sfi_config->sg_inst_table_index = cpu_to_le16(sfi->gate_id);
633 	sfi_config->input_ports = cpu_to_le32(1 << port);
634 
635 	/* The priority value which may be matched against the
636 	 * frame’s priority value to determine a match for this entry.
637 	 */
638 	if (sfi->prio >= 0)
639 		sfi_config->multi |= (sfi->prio & 0x7) | 0x8;
640 
641 	/* Filter Type. Identifies the contents of the MSDU/FM_INST_INDEX
642 	 * field as being either an MSDU value or an index into the Flow
643 	 * Meter Instance table.
644 	 */
645 	if (sfi->maxsdu) {
646 		sfi_config->msdu =
647 		cpu_to_le16(sfi->maxsdu);
648 		sfi_config->multi |= 0x40;
649 	}
650 
651 	if (sfi->meter_id >= 0) {
652 		sfi_config->fm_inst_table_index = cpu_to_le16(sfi->meter_id);
653 		sfi_config->multi |= 0x80;
654 	}
655 
656 exit:
657 	return enetc_send_cmd(priv->si, &cbd);
658 }
659 
enetc_streamcounter_hw_get(struct enetc_ndev_priv * priv,u32 index,struct psfp_streamfilter_counters * cnt)660 static int enetc_streamcounter_hw_get(struct enetc_ndev_priv *priv,
661 				      u32 index,
662 				      struct psfp_streamfilter_counters *cnt)
663 {
664 	struct enetc_cbd cbd = { .cmd = 2 };
665 	struct sfi_counter_data *data_buf;
666 	dma_addr_t dma;
667 	u16 data_size;
668 	void *tmp;
669 	int err;
670 
671 	cbd.index = cpu_to_le16((u16)index);
672 	cbd.cmd = 2;
673 	cbd.cls = BDCR_CMD_STREAM_FILTER;
674 	cbd.status_flags = 0;
675 
676 	data_size = sizeof(struct sfi_counter_data);
677 
678 	tmp = enetc_cbd_alloc_data_mem(priv->si, &cbd, data_size,
679 				       &dma, (void *)&data_buf);
680 	if (!tmp)
681 		return -ENOMEM;
682 
683 	err = enetc_send_cmd(priv->si, &cbd);
684 	if (err)
685 		goto exit;
686 
687 	cnt->matching_frames_count = ((u64)data_buf->matchh << 32) +
688 				     data_buf->matchl;
689 
690 	cnt->not_passing_sdu_count = ((u64)data_buf->msdu_droph << 32) +
691 				     data_buf->msdu_dropl;
692 
693 	cnt->passing_sdu_count = cnt->matching_frames_count
694 				- cnt->not_passing_sdu_count;
695 
696 	cnt->not_passing_frames_count =
697 				((u64)data_buf->stream_gate_droph << 32) +
698 				data_buf->stream_gate_dropl;
699 
700 	cnt->passing_frames_count = cnt->matching_frames_count -
701 				    cnt->not_passing_sdu_count -
702 				    cnt->not_passing_frames_count;
703 
704 	cnt->red_frames_count =	((u64)data_buf->flow_meter_droph << 32)	+
705 				data_buf->flow_meter_dropl;
706 
707 exit:
708 	enetc_cbd_free_data_mem(priv->si, data_size, tmp, &dma);
709 
710 	return err;
711 }
712 
get_ptp_now(struct enetc_hw * hw)713 static u64 get_ptp_now(struct enetc_hw *hw)
714 {
715 	u64 now_lo, now_hi, now;
716 
717 	now_lo = enetc_rd(hw, ENETC_SICTR0);
718 	now_hi = enetc_rd(hw, ENETC_SICTR1);
719 	now = now_lo | now_hi << 32;
720 
721 	return now;
722 }
723 
get_start_ns(u64 now,u64 cycle,u64 * start)724 static int get_start_ns(u64 now, u64 cycle, u64 *start)
725 {
726 	u64 n;
727 
728 	if (!cycle)
729 		return -EFAULT;
730 
731 	n = div64_u64(now, cycle);
732 
733 	*start = (n + 1) * cycle;
734 
735 	return 0;
736 }
737 
738 /* Stream Gate Instance Set Descriptor */
enetc_streamgate_hw_set(struct enetc_ndev_priv * priv,struct enetc_psfp_gate * sgi,u8 enable)739 static int enetc_streamgate_hw_set(struct enetc_ndev_priv *priv,
740 				   struct enetc_psfp_gate *sgi,
741 				   u8 enable)
742 {
743 	struct enetc_cbd cbd = { .cmd = 0 };
744 	struct sgi_table *sgi_config;
745 	struct sgcl_conf *sgcl_config;
746 	struct sgcl_data *sgcl_data;
747 	struct sgce *sgce;
748 	dma_addr_t dma;
749 	u16 data_size;
750 	int err, i;
751 	void *tmp;
752 	u64 now;
753 
754 	cbd.index = cpu_to_le16(sgi->index);
755 	cbd.cmd = 0;
756 	cbd.cls = BDCR_CMD_STREAM_GCL;
757 	cbd.status_flags = 0x80;
758 
759 	/* disable */
760 	if (!enable)
761 		return enetc_send_cmd(priv->si, &cbd);
762 
763 	if (!sgi->num_entries)
764 		return 0;
765 
766 	if (sgi->num_entries > priv->psfp_cap.max_psfp_gatelist ||
767 	    !sgi->cycletime)
768 		return -EINVAL;
769 
770 	/* enable */
771 	sgi_config = &cbd.sgi_table;
772 
773 	/* Keep open before gate list start */
774 	sgi_config->ocgtst = 0x80;
775 
776 	sgi_config->oipv = (sgi->init_ipv < 0) ?
777 				0x0 : ((sgi->init_ipv & 0x7) | 0x8);
778 
779 	sgi_config->en = 0x80;
780 
781 	/* Basic config */
782 	err = enetc_send_cmd(priv->si, &cbd);
783 	if (err)
784 		return -EINVAL;
785 
786 	memset(&cbd, 0, sizeof(cbd));
787 
788 	cbd.index = cpu_to_le16(sgi->index);
789 	cbd.cmd = 1;
790 	cbd.cls = BDCR_CMD_STREAM_GCL;
791 	cbd.status_flags = 0;
792 
793 	sgcl_config = &cbd.sgcl_conf;
794 
795 	sgcl_config->acl_len = (sgi->num_entries - 1) & 0x3;
796 
797 	data_size = struct_size(sgcl_data, sgcl, sgi->num_entries);
798 	tmp = enetc_cbd_alloc_data_mem(priv->si, &cbd, data_size,
799 				       &dma, (void *)&sgcl_data);
800 	if (!tmp)
801 		return -ENOMEM;
802 
803 	sgce = &sgcl_data->sgcl[0];
804 
805 	sgcl_config->agtst = 0x80;
806 
807 	sgcl_data->ct = sgi->cycletime;
808 	sgcl_data->cte = sgi->cycletimext;
809 
810 	if (sgi->init_ipv >= 0)
811 		sgcl_config->aipv = (sgi->init_ipv & 0x7) | 0x8;
812 
813 	for (i = 0; i < sgi->num_entries; i++) {
814 		struct action_gate_entry *from = &sgi->entries[i];
815 		struct sgce *to = &sgce[i];
816 
817 		if (from->gate_state)
818 			to->multi |= 0x10;
819 
820 		if (from->ipv >= 0)
821 			to->multi |= ((from->ipv & 0x7) << 5) | 0x08;
822 
823 		if (from->maxoctets >= 0) {
824 			to->multi |= 0x01;
825 			to->msdu[0] = from->maxoctets & 0xFF;
826 			to->msdu[1] = (from->maxoctets >> 8) & 0xFF;
827 			to->msdu[2] = (from->maxoctets >> 16) & 0xFF;
828 		}
829 
830 		to->interval = from->interval;
831 	}
832 
833 	/* If basetime is less than now, calculate start time */
834 	now = get_ptp_now(&priv->si->hw);
835 
836 	if (sgi->basetime < now) {
837 		u64 start;
838 
839 		err = get_start_ns(now, sgi->cycletime, &start);
840 		if (err)
841 			goto exit;
842 		sgcl_data->btl = lower_32_bits(start);
843 		sgcl_data->bth = upper_32_bits(start);
844 	} else {
845 		u32 hi, lo;
846 
847 		hi = upper_32_bits(sgi->basetime);
848 		lo = lower_32_bits(sgi->basetime);
849 		sgcl_data->bth = hi;
850 		sgcl_data->btl = lo;
851 	}
852 
853 	err = enetc_send_cmd(priv->si, &cbd);
854 
855 exit:
856 	enetc_cbd_free_data_mem(priv->si, data_size, tmp, &dma);
857 	return err;
858 }
859 
enetc_flowmeter_hw_set(struct enetc_ndev_priv * priv,struct enetc_psfp_meter * fmi,u8 enable)860 static int enetc_flowmeter_hw_set(struct enetc_ndev_priv *priv,
861 				  struct enetc_psfp_meter *fmi,
862 				  u8 enable)
863 {
864 	struct enetc_cbd cbd = { .cmd = 0 };
865 	struct fmi_conf *fmi_config;
866 	u64 temp = 0;
867 
868 	cbd.index = cpu_to_le16((u16)fmi->index);
869 	cbd.cls = BDCR_CMD_FLOW_METER;
870 	cbd.status_flags = 0x80;
871 
872 	if (!enable)
873 		return enetc_send_cmd(priv->si, &cbd);
874 
875 	fmi_config = &cbd.fmi_conf;
876 	fmi_config->en = 0x80;
877 
878 	if (fmi->cir) {
879 		temp = (u64)8000 * fmi->cir;
880 		temp = div_u64(temp, 3725);
881 	}
882 
883 	fmi_config->cir = cpu_to_le32((u32)temp);
884 	fmi_config->cbs = cpu_to_le32(fmi->cbs);
885 
886 	/* Default for eir ebs disable */
887 	fmi_config->eir = 0;
888 	fmi_config->ebs = 0;
889 
890 	/* Default:
891 	 * mark red disable
892 	 * drop on yellow disable
893 	 * color mode disable
894 	 * couple flag disable
895 	 */
896 	fmi_config->conf = 0;
897 
898 	return enetc_send_cmd(priv->si, &cbd);
899 }
900 
enetc_get_stream_by_index(u32 index)901 static struct enetc_stream_filter *enetc_get_stream_by_index(u32 index)
902 {
903 	struct enetc_stream_filter *f;
904 
905 	hlist_for_each_entry(f, &epsfp.stream_list, node)
906 		if (f->sid.index == index)
907 			return f;
908 
909 	return NULL;
910 }
911 
enetc_get_gate_by_index(u32 index)912 static struct enetc_psfp_gate *enetc_get_gate_by_index(u32 index)
913 {
914 	struct enetc_psfp_gate *g;
915 
916 	hlist_for_each_entry(g, &epsfp.psfp_gate_list, node)
917 		if (g->index == index)
918 			return g;
919 
920 	return NULL;
921 }
922 
enetc_get_filter_by_index(u32 index)923 static struct enetc_psfp_filter *enetc_get_filter_by_index(u32 index)
924 {
925 	struct enetc_psfp_filter *s;
926 
927 	hlist_for_each_entry(s, &epsfp.psfp_filter_list, node)
928 		if (s->index == index)
929 			return s;
930 
931 	return NULL;
932 }
933 
enetc_get_meter_by_index(u32 index)934 static struct enetc_psfp_meter *enetc_get_meter_by_index(u32 index)
935 {
936 	struct enetc_psfp_meter *m;
937 
938 	hlist_for_each_entry(m, &epsfp.psfp_meter_list, node)
939 		if (m->index == index)
940 			return m;
941 
942 	return NULL;
943 }
944 
945 static struct enetc_psfp_filter
enetc_psfp_check_sfi(struct enetc_psfp_filter * sfi)946 	*enetc_psfp_check_sfi(struct enetc_psfp_filter *sfi)
947 {
948 	struct enetc_psfp_filter *s;
949 
950 	hlist_for_each_entry(s, &epsfp.psfp_filter_list, node)
951 		if (s->gate_id == sfi->gate_id &&
952 		    s->prio == sfi->prio &&
953 		    s->maxsdu == sfi->maxsdu &&
954 		    s->meter_id == sfi->meter_id)
955 			return s;
956 
957 	return NULL;
958 }
959 
enetc_get_free_index(struct enetc_ndev_priv * priv)960 static int enetc_get_free_index(struct enetc_ndev_priv *priv)
961 {
962 	u32 max_size = priv->psfp_cap.max_psfp_filter;
963 	unsigned long index;
964 
965 	index = find_first_zero_bit(epsfp.psfp_sfi_bitmap, max_size);
966 	if (index == max_size)
967 		return -1;
968 
969 	return index;
970 }
971 
stream_filter_unref(struct enetc_ndev_priv * priv,u32 index)972 static void stream_filter_unref(struct enetc_ndev_priv *priv, u32 index)
973 {
974 	struct enetc_psfp_filter *sfi;
975 	u8 z;
976 
977 	sfi = enetc_get_filter_by_index(index);
978 	WARN_ON(!sfi);
979 	z = refcount_dec_and_test(&sfi->refcount);
980 
981 	if (z) {
982 		enetc_streamfilter_hw_set(priv, sfi, false);
983 		hlist_del(&sfi->node);
984 		kfree(sfi);
985 		clear_bit(index, epsfp.psfp_sfi_bitmap);
986 	}
987 }
988 
stream_gate_unref(struct enetc_ndev_priv * priv,u32 index)989 static void stream_gate_unref(struct enetc_ndev_priv *priv, u32 index)
990 {
991 	struct enetc_psfp_gate *sgi;
992 	u8 z;
993 
994 	sgi = enetc_get_gate_by_index(index);
995 	WARN_ON(!sgi);
996 	z = refcount_dec_and_test(&sgi->refcount);
997 	if (z) {
998 		enetc_streamgate_hw_set(priv, sgi, false);
999 		hlist_del(&sgi->node);
1000 		kfree(sgi);
1001 	}
1002 }
1003 
flow_meter_unref(struct enetc_ndev_priv * priv,u32 index)1004 static void flow_meter_unref(struct enetc_ndev_priv *priv, u32 index)
1005 {
1006 	struct enetc_psfp_meter *fmi;
1007 	u8 z;
1008 
1009 	fmi = enetc_get_meter_by_index(index);
1010 	WARN_ON(!fmi);
1011 	z = refcount_dec_and_test(&fmi->refcount);
1012 	if (z) {
1013 		enetc_flowmeter_hw_set(priv, fmi, false);
1014 		hlist_del(&fmi->node);
1015 		kfree(fmi);
1016 	}
1017 }
1018 
remove_one_chain(struct enetc_ndev_priv * priv,struct enetc_stream_filter * filter)1019 static void remove_one_chain(struct enetc_ndev_priv *priv,
1020 			     struct enetc_stream_filter *filter)
1021 {
1022 	if (filter->flags & ENETC_PSFP_FLAGS_FMI)
1023 		flow_meter_unref(priv, filter->fmi_index);
1024 
1025 	stream_gate_unref(priv, filter->sgi_index);
1026 	stream_filter_unref(priv, filter->sfi_index);
1027 
1028 	hlist_del(&filter->node);
1029 	kfree(filter);
1030 }
1031 
enetc_psfp_hw_set(struct enetc_ndev_priv * priv,struct enetc_streamid * sid,struct enetc_psfp_filter * sfi,struct enetc_psfp_gate * sgi,struct enetc_psfp_meter * fmi)1032 static int enetc_psfp_hw_set(struct enetc_ndev_priv *priv,
1033 			     struct enetc_streamid *sid,
1034 			     struct enetc_psfp_filter *sfi,
1035 			     struct enetc_psfp_gate *sgi,
1036 			     struct enetc_psfp_meter *fmi)
1037 {
1038 	int err;
1039 
1040 	err = enetc_streamid_hw_set(priv, sid, true);
1041 	if (err)
1042 		return err;
1043 
1044 	if (sfi) {
1045 		err = enetc_streamfilter_hw_set(priv, sfi, true);
1046 		if (err)
1047 			goto revert_sid;
1048 	}
1049 
1050 	err = enetc_streamgate_hw_set(priv, sgi, true);
1051 	if (err)
1052 		goto revert_sfi;
1053 
1054 	if (fmi) {
1055 		err = enetc_flowmeter_hw_set(priv, fmi, true);
1056 		if (err)
1057 			goto revert_sgi;
1058 	}
1059 
1060 	return 0;
1061 
1062 revert_sgi:
1063 	enetc_streamgate_hw_set(priv, sgi, false);
1064 revert_sfi:
1065 	if (sfi)
1066 		enetc_streamfilter_hw_set(priv, sfi, false);
1067 revert_sid:
1068 	enetc_streamid_hw_set(priv, sid, false);
1069 	return err;
1070 }
1071 
1072 static struct actions_fwd *
enetc_check_flow_actions(u64 acts,unsigned long long inputkeys)1073 enetc_check_flow_actions(u64 acts, unsigned long long inputkeys)
1074 {
1075 	int i;
1076 
1077 	for (i = 0; i < ARRAY_SIZE(enetc_act_fwd); i++)
1078 		if (acts == enetc_act_fwd[i].actions &&
1079 		    inputkeys & enetc_act_fwd[i].keys)
1080 			return &enetc_act_fwd[i];
1081 
1082 	return NULL;
1083 }
1084 
enetc_psfp_policer_validate(const struct flow_action * action,const struct flow_action_entry * act,struct netlink_ext_ack * extack)1085 static int enetc_psfp_policer_validate(const struct flow_action *action,
1086 				       const struct flow_action_entry *act,
1087 				       struct netlink_ext_ack *extack)
1088 {
1089 	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
1090 		NL_SET_ERR_MSG_MOD(extack,
1091 				   "Offload not supported when exceed action is not drop");
1092 		return -EOPNOTSUPP;
1093 	}
1094 
1095 	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
1096 	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
1097 		NL_SET_ERR_MSG_MOD(extack,
1098 				   "Offload not supported when conform action is not pipe or ok");
1099 		return -EOPNOTSUPP;
1100 	}
1101 
1102 	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
1103 	    !flow_action_is_last_entry(action, act)) {
1104 		NL_SET_ERR_MSG_MOD(extack,
1105 				   "Offload not supported when conform action is ok, but action is not last");
1106 		return -EOPNOTSUPP;
1107 	}
1108 
1109 	if (act->police.peakrate_bytes_ps ||
1110 	    act->police.avrate || act->police.overhead) {
1111 		NL_SET_ERR_MSG_MOD(extack,
1112 				   "Offload not supported when peakrate/avrate/overhead is configured");
1113 		return -EOPNOTSUPP;
1114 	}
1115 
1116 	if (act->police.rate_pkt_ps) {
1117 		NL_SET_ERR_MSG_MOD(extack,
1118 				   "QoS offload not support packets per second");
1119 		return -EOPNOTSUPP;
1120 	}
1121 
1122 	return 0;
1123 }
1124 
enetc_psfp_parse_clsflower(struct enetc_ndev_priv * priv,struct flow_cls_offload * f)1125 static int enetc_psfp_parse_clsflower(struct enetc_ndev_priv *priv,
1126 				      struct flow_cls_offload *f)
1127 {
1128 	struct flow_action_entry *entryg = NULL, *entryp = NULL;
1129 	struct flow_rule *rule = flow_cls_offload_flow_rule(f);
1130 	struct netlink_ext_ack *extack = f->common.extack;
1131 	struct enetc_stream_filter *filter, *old_filter;
1132 	struct enetc_psfp_meter *fmi = NULL, *old_fmi;
1133 	struct enetc_psfp_filter *sfi, *old_sfi;
1134 	struct enetc_psfp_gate *sgi, *old_sgi;
1135 	struct flow_action_entry *entry;
1136 	struct action_gate_entry *e;
1137 	u8 sfi_overwrite = 0;
1138 	int entries_size;
1139 	int i, err;
1140 
1141 	if (f->common.chain_index >= priv->psfp_cap.max_streamid) {
1142 		NL_SET_ERR_MSG_MOD(extack, "No Stream identify resource!");
1143 		return -ENOSPC;
1144 	}
1145 
1146 	flow_action_for_each(i, entry, &rule->action)
1147 		if (entry->id == FLOW_ACTION_GATE)
1148 			entryg = entry;
1149 		else if (entry->id == FLOW_ACTION_POLICE)
1150 			entryp = entry;
1151 
1152 	/* Not support without gate action */
1153 	if (!entryg)
1154 		return -EINVAL;
1155 
1156 	filter = kzalloc(sizeof(*filter), GFP_KERNEL);
1157 	if (!filter)
1158 		return -ENOMEM;
1159 
1160 	filter->sid.index = f->common.chain_index;
1161 
1162 	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
1163 		struct flow_match_eth_addrs match;
1164 
1165 		flow_rule_match_eth_addrs(rule, &match);
1166 
1167 		if (!is_zero_ether_addr(match.mask->dst) &&
1168 		    !is_zero_ether_addr(match.mask->src)) {
1169 			NL_SET_ERR_MSG_MOD(extack,
1170 					   "Cannot match on both source and destination MAC");
1171 			err = -EINVAL;
1172 			goto free_filter;
1173 		}
1174 
1175 		if (!is_zero_ether_addr(match.mask->dst)) {
1176 			if (!is_broadcast_ether_addr(match.mask->dst)) {
1177 				NL_SET_ERR_MSG_MOD(extack,
1178 						   "Masked matching on destination MAC not supported");
1179 				err = -EINVAL;
1180 				goto free_filter;
1181 			}
1182 			ether_addr_copy(filter->sid.dst_mac, match.key->dst);
1183 			filter->sid.filtertype = STREAMID_TYPE_NULL;
1184 		}
1185 
1186 		if (!is_zero_ether_addr(match.mask->src)) {
1187 			if (!is_broadcast_ether_addr(match.mask->src)) {
1188 				NL_SET_ERR_MSG_MOD(extack,
1189 						   "Masked matching on source MAC not supported");
1190 				err = -EINVAL;
1191 				goto free_filter;
1192 			}
1193 			ether_addr_copy(filter->sid.src_mac, match.key->src);
1194 			filter->sid.filtertype = STREAMID_TYPE_SMAC;
1195 		}
1196 	} else {
1197 		NL_SET_ERR_MSG_MOD(extack, "Unsupported, must include ETH_ADDRS");
1198 		err = -EINVAL;
1199 		goto free_filter;
1200 	}
1201 
1202 	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
1203 		struct flow_match_vlan match;
1204 
1205 		flow_rule_match_vlan(rule, &match);
1206 		if (match.mask->vlan_priority) {
1207 			if (match.mask->vlan_priority !=
1208 			    (VLAN_PRIO_MASK >> VLAN_PRIO_SHIFT)) {
1209 				NL_SET_ERR_MSG_MOD(extack, "Only full mask is supported for VLAN priority");
1210 				err = -EINVAL;
1211 				goto free_filter;
1212 			}
1213 		}
1214 
1215 		if (match.mask->vlan_id) {
1216 			if (match.mask->vlan_id != VLAN_VID_MASK) {
1217 				NL_SET_ERR_MSG_MOD(extack, "Only full mask is supported for VLAN id");
1218 				err = -EINVAL;
1219 				goto free_filter;
1220 			}
1221 
1222 			filter->sid.vid = match.key->vlan_id;
1223 			if (!filter->sid.vid)
1224 				filter->sid.tagged = STREAMID_VLAN_UNTAGGED;
1225 			else
1226 				filter->sid.tagged = STREAMID_VLAN_TAGGED;
1227 		}
1228 	} else {
1229 		filter->sid.tagged = STREAMID_VLAN_ALL;
1230 	}
1231 
1232 	/* parsing gate action */
1233 	if (entryg->hw_index >= priv->psfp_cap.max_psfp_gate) {
1234 		NL_SET_ERR_MSG_MOD(extack, "No Stream Gate resource!");
1235 		err = -ENOSPC;
1236 		goto free_filter;
1237 	}
1238 
1239 	if (entryg->gate.num_entries >= priv->psfp_cap.max_psfp_gatelist) {
1240 		NL_SET_ERR_MSG_MOD(extack, "No Stream Gate resource!");
1241 		err = -ENOSPC;
1242 		goto free_filter;
1243 	}
1244 
1245 	entries_size = struct_size(sgi, entries, entryg->gate.num_entries);
1246 	sgi = kzalloc(entries_size, GFP_KERNEL);
1247 	if (!sgi) {
1248 		err = -ENOMEM;
1249 		goto free_filter;
1250 	}
1251 
1252 	refcount_set(&sgi->refcount, 1);
1253 	sgi->index = entryg->hw_index;
1254 	sgi->init_ipv = entryg->gate.prio;
1255 	sgi->basetime = entryg->gate.basetime;
1256 	sgi->cycletime = entryg->gate.cycletime;
1257 	sgi->num_entries = entryg->gate.num_entries;
1258 
1259 	e = sgi->entries;
1260 	for (i = 0; i < entryg->gate.num_entries; i++) {
1261 		e[i].gate_state = entryg->gate.entries[i].gate_state;
1262 		e[i].interval = entryg->gate.entries[i].interval;
1263 		e[i].ipv = entryg->gate.entries[i].ipv;
1264 		e[i].maxoctets = entryg->gate.entries[i].maxoctets;
1265 	}
1266 
1267 	filter->sgi_index = sgi->index;
1268 
1269 	sfi = kzalloc(sizeof(*sfi), GFP_KERNEL);
1270 	if (!sfi) {
1271 		err = -ENOMEM;
1272 		goto free_gate;
1273 	}
1274 
1275 	refcount_set(&sfi->refcount, 1);
1276 	sfi->gate_id = sgi->index;
1277 	sfi->meter_id = ENETC_PSFP_WILDCARD;
1278 
1279 	/* Flow meter and max frame size */
1280 	if (entryp) {
1281 		err = enetc_psfp_policer_validate(&rule->action, entryp, extack);
1282 		if (err)
1283 			goto free_sfi;
1284 
1285 		if (entryp->police.burst) {
1286 			fmi = kzalloc(sizeof(*fmi), GFP_KERNEL);
1287 			if (!fmi) {
1288 				err = -ENOMEM;
1289 				goto free_sfi;
1290 			}
1291 			refcount_set(&fmi->refcount, 1);
1292 			fmi->cir = entryp->police.rate_bytes_ps;
1293 			fmi->cbs = entryp->police.burst;
1294 			fmi->index = entryp->hw_index;
1295 			filter->flags |= ENETC_PSFP_FLAGS_FMI;
1296 			filter->fmi_index = fmi->index;
1297 			sfi->meter_id = fmi->index;
1298 		}
1299 
1300 		if (entryp->police.mtu)
1301 			sfi->maxsdu = entryp->police.mtu;
1302 	}
1303 
1304 	/* prio ref the filter prio */
1305 	if (f->common.prio && f->common.prio <= BIT(3))
1306 		sfi->prio = f->common.prio - 1;
1307 	else
1308 		sfi->prio = ENETC_PSFP_WILDCARD;
1309 
1310 	old_sfi = enetc_psfp_check_sfi(sfi);
1311 	if (!old_sfi) {
1312 		int index;
1313 
1314 		index = enetc_get_free_index(priv);
1315 		if (index < 0) {
1316 			NL_SET_ERR_MSG_MOD(extack, "No Stream Filter resource!");
1317 			err = -ENOSPC;
1318 			goto free_fmi;
1319 		}
1320 
1321 		sfi->index = index;
1322 		sfi->handle = index + HANDLE_OFFSET;
1323 		/* Update the stream filter handle also */
1324 		filter->sid.handle = sfi->handle;
1325 		filter->sfi_index = sfi->index;
1326 		sfi_overwrite = 0;
1327 	} else {
1328 		filter->sfi_index = old_sfi->index;
1329 		filter->sid.handle = old_sfi->handle;
1330 		sfi_overwrite = 1;
1331 	}
1332 
1333 	err = enetc_psfp_hw_set(priv, &filter->sid,
1334 				sfi_overwrite ? NULL : sfi, sgi, fmi);
1335 	if (err)
1336 		goto free_fmi;
1337 
1338 	spin_lock(&epsfp.psfp_lock);
1339 	if (filter->flags & ENETC_PSFP_FLAGS_FMI) {
1340 		old_fmi = enetc_get_meter_by_index(filter->fmi_index);
1341 		if (old_fmi) {
1342 			fmi->refcount = old_fmi->refcount;
1343 			refcount_set(&fmi->refcount,
1344 				     refcount_read(&old_fmi->refcount) + 1);
1345 			hlist_del(&old_fmi->node);
1346 			kfree(old_fmi);
1347 		}
1348 		hlist_add_head(&fmi->node, &epsfp.psfp_meter_list);
1349 	}
1350 
1351 	/* Remove the old node if exist and update with a new node */
1352 	old_sgi = enetc_get_gate_by_index(filter->sgi_index);
1353 	if (old_sgi) {
1354 		refcount_set(&sgi->refcount,
1355 			     refcount_read(&old_sgi->refcount) + 1);
1356 		hlist_del(&old_sgi->node);
1357 		kfree(old_sgi);
1358 	}
1359 
1360 	hlist_add_head(&sgi->node, &epsfp.psfp_gate_list);
1361 
1362 	if (!old_sfi) {
1363 		hlist_add_head(&sfi->node, &epsfp.psfp_filter_list);
1364 		set_bit(sfi->index, epsfp.psfp_sfi_bitmap);
1365 	} else {
1366 		kfree(sfi);
1367 		refcount_inc(&old_sfi->refcount);
1368 	}
1369 
1370 	old_filter = enetc_get_stream_by_index(filter->sid.index);
1371 	if (old_filter)
1372 		remove_one_chain(priv, old_filter);
1373 
1374 	filter->stats.lastused = jiffies;
1375 	hlist_add_head(&filter->node, &epsfp.stream_list);
1376 
1377 	spin_unlock(&epsfp.psfp_lock);
1378 
1379 	return 0;
1380 
1381 free_fmi:
1382 	kfree(fmi);
1383 free_sfi:
1384 	kfree(sfi);
1385 free_gate:
1386 	kfree(sgi);
1387 free_filter:
1388 	kfree(filter);
1389 
1390 	return err;
1391 }
1392 
enetc_config_clsflower(struct enetc_ndev_priv * priv,struct flow_cls_offload * cls_flower)1393 static int enetc_config_clsflower(struct enetc_ndev_priv *priv,
1394 				  struct flow_cls_offload *cls_flower)
1395 {
1396 	struct flow_rule *rule = flow_cls_offload_flow_rule(cls_flower);
1397 	struct netlink_ext_ack *extack = cls_flower->common.extack;
1398 	struct flow_dissector *dissector = rule->match.dissector;
1399 	struct flow_action *action = &rule->action;
1400 	struct flow_action_entry *entry;
1401 	struct actions_fwd *fwd;
1402 	u64 actions = 0;
1403 	int i, err;
1404 
1405 	if (!flow_action_has_entries(action)) {
1406 		NL_SET_ERR_MSG_MOD(extack, "At least one action is needed");
1407 		return -EINVAL;
1408 	}
1409 
1410 	flow_action_for_each(i, entry, action)
1411 		actions |= BIT(entry->id);
1412 
1413 	fwd = enetc_check_flow_actions(actions, dissector->used_keys);
1414 	if (!fwd) {
1415 		NL_SET_ERR_MSG_MOD(extack, "Unsupported filter type!");
1416 		return -EOPNOTSUPP;
1417 	}
1418 
1419 	if (fwd->output & FILTER_ACTION_TYPE_PSFP) {
1420 		err = enetc_psfp_parse_clsflower(priv, cls_flower);
1421 		if (err) {
1422 			NL_SET_ERR_MSG_MOD(extack, "Invalid PSFP inputs");
1423 			return err;
1424 		}
1425 	} else {
1426 		NL_SET_ERR_MSG_MOD(extack, "Unsupported actions");
1427 		return -EOPNOTSUPP;
1428 	}
1429 
1430 	return 0;
1431 }
1432 
enetc_psfp_destroy_clsflower(struct enetc_ndev_priv * priv,struct flow_cls_offload * f)1433 static int enetc_psfp_destroy_clsflower(struct enetc_ndev_priv *priv,
1434 					struct flow_cls_offload *f)
1435 {
1436 	struct enetc_stream_filter *filter;
1437 	struct netlink_ext_ack *extack = f->common.extack;
1438 	int err;
1439 
1440 	if (f->common.chain_index >= priv->psfp_cap.max_streamid) {
1441 		NL_SET_ERR_MSG_MOD(extack, "No Stream identify resource!");
1442 		return -ENOSPC;
1443 	}
1444 
1445 	filter = enetc_get_stream_by_index(f->common.chain_index);
1446 	if (!filter)
1447 		return -EINVAL;
1448 
1449 	err = enetc_streamid_hw_set(priv, &filter->sid, false);
1450 	if (err)
1451 		return err;
1452 
1453 	remove_one_chain(priv, filter);
1454 
1455 	return 0;
1456 }
1457 
enetc_destroy_clsflower(struct enetc_ndev_priv * priv,struct flow_cls_offload * f)1458 static int enetc_destroy_clsflower(struct enetc_ndev_priv *priv,
1459 				   struct flow_cls_offload *f)
1460 {
1461 	return enetc_psfp_destroy_clsflower(priv, f);
1462 }
1463 
enetc_psfp_get_stats(struct enetc_ndev_priv * priv,struct flow_cls_offload * f)1464 static int enetc_psfp_get_stats(struct enetc_ndev_priv *priv,
1465 				struct flow_cls_offload *f)
1466 {
1467 	struct psfp_streamfilter_counters counters = {};
1468 	struct enetc_stream_filter *filter;
1469 	struct flow_stats stats = {};
1470 	int err;
1471 
1472 	filter = enetc_get_stream_by_index(f->common.chain_index);
1473 	if (!filter)
1474 		return -EINVAL;
1475 
1476 	err = enetc_streamcounter_hw_get(priv, filter->sfi_index, &counters);
1477 	if (err)
1478 		return -EINVAL;
1479 
1480 	spin_lock(&epsfp.psfp_lock);
1481 	stats.pkts = counters.matching_frames_count +
1482 		     counters.not_passing_sdu_count -
1483 		     filter->stats.pkts;
1484 	stats.drops = counters.not_passing_frames_count +
1485 		      counters.not_passing_sdu_count +
1486 		      counters.red_frames_count -
1487 		      filter->stats.drops;
1488 	stats.lastused = filter->stats.lastused;
1489 	filter->stats.pkts += stats.pkts;
1490 	filter->stats.drops += stats.drops;
1491 	spin_unlock(&epsfp.psfp_lock);
1492 
1493 	flow_stats_update(&f->stats, 0x0, stats.pkts, stats.drops,
1494 			  stats.lastused, FLOW_ACTION_HW_STATS_DELAYED);
1495 
1496 	return 0;
1497 }
1498 
enetc_setup_tc_cls_flower(struct enetc_ndev_priv * priv,struct flow_cls_offload * cls_flower)1499 static int enetc_setup_tc_cls_flower(struct enetc_ndev_priv *priv,
1500 				     struct flow_cls_offload *cls_flower)
1501 {
1502 	switch (cls_flower->command) {
1503 	case FLOW_CLS_REPLACE:
1504 		return enetc_config_clsflower(priv, cls_flower);
1505 	case FLOW_CLS_DESTROY:
1506 		return enetc_destroy_clsflower(priv, cls_flower);
1507 	case FLOW_CLS_STATS:
1508 		return enetc_psfp_get_stats(priv, cls_flower);
1509 	default:
1510 		return -EOPNOTSUPP;
1511 	}
1512 }
1513 
clean_psfp_sfi_bitmap(void)1514 static inline void clean_psfp_sfi_bitmap(void)
1515 {
1516 	bitmap_free(epsfp.psfp_sfi_bitmap);
1517 	epsfp.psfp_sfi_bitmap = NULL;
1518 }
1519 
clean_stream_list(void)1520 static void clean_stream_list(void)
1521 {
1522 	struct enetc_stream_filter *s;
1523 	struct hlist_node *tmp;
1524 
1525 	hlist_for_each_entry_safe(s, tmp, &epsfp.stream_list, node) {
1526 		hlist_del(&s->node);
1527 		kfree(s);
1528 	}
1529 }
1530 
clean_sfi_list(void)1531 static void clean_sfi_list(void)
1532 {
1533 	struct enetc_psfp_filter *sfi;
1534 	struct hlist_node *tmp;
1535 
1536 	hlist_for_each_entry_safe(sfi, tmp, &epsfp.psfp_filter_list, node) {
1537 		hlist_del(&sfi->node);
1538 		kfree(sfi);
1539 	}
1540 }
1541 
clean_sgi_list(void)1542 static void clean_sgi_list(void)
1543 {
1544 	struct enetc_psfp_gate *sgi;
1545 	struct hlist_node *tmp;
1546 
1547 	hlist_for_each_entry_safe(sgi, tmp, &epsfp.psfp_gate_list, node) {
1548 		hlist_del(&sgi->node);
1549 		kfree(sgi);
1550 	}
1551 }
1552 
clean_psfp_all(void)1553 static void clean_psfp_all(void)
1554 {
1555 	/* Disable all list nodes and free all memory */
1556 	clean_sfi_list();
1557 	clean_sgi_list();
1558 	clean_stream_list();
1559 	epsfp.dev_bitmap = 0;
1560 	clean_psfp_sfi_bitmap();
1561 }
1562 
enetc_setup_tc_block_cb(enum tc_setup_type type,void * type_data,void * cb_priv)1563 int enetc_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1564 			    void *cb_priv)
1565 {
1566 	struct net_device *ndev = cb_priv;
1567 
1568 	if (!tc_can_offload(ndev))
1569 		return -EOPNOTSUPP;
1570 
1571 	switch (type) {
1572 	case TC_SETUP_CLSFLOWER:
1573 		return enetc_setup_tc_cls_flower(netdev_priv(ndev), type_data);
1574 	default:
1575 		return -EOPNOTSUPP;
1576 	}
1577 }
1578 
enetc_set_psfp(struct net_device * ndev,bool en)1579 int enetc_set_psfp(struct net_device *ndev, bool en)
1580 {
1581 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
1582 	int err;
1583 
1584 	if (en) {
1585 		err = enetc_psfp_enable(priv);
1586 		if (err)
1587 			return err;
1588 
1589 		priv->active_offloads |= ENETC_F_QCI;
1590 		return 0;
1591 	}
1592 
1593 	err = enetc_psfp_disable(priv);
1594 	if (err)
1595 		return err;
1596 
1597 	priv->active_offloads &= ~ENETC_F_QCI;
1598 
1599 	return 0;
1600 }
1601 
enetc_psfp_init(struct enetc_ndev_priv * priv)1602 int enetc_psfp_init(struct enetc_ndev_priv *priv)
1603 {
1604 	if (epsfp.psfp_sfi_bitmap)
1605 		return 0;
1606 
1607 	epsfp.psfp_sfi_bitmap = bitmap_zalloc(priv->psfp_cap.max_psfp_filter,
1608 					      GFP_KERNEL);
1609 	if (!epsfp.psfp_sfi_bitmap)
1610 		return -ENOMEM;
1611 
1612 	spin_lock_init(&epsfp.psfp_lock);
1613 
1614 	if (list_empty(&enetc_block_cb_list))
1615 		epsfp.dev_bitmap = 0;
1616 
1617 	return 0;
1618 }
1619 
enetc_psfp_clean(struct enetc_ndev_priv * priv)1620 int enetc_psfp_clean(struct enetc_ndev_priv *priv)
1621 {
1622 	if (!list_empty(&enetc_block_cb_list))
1623 		return -EBUSY;
1624 
1625 	clean_psfp_all();
1626 
1627 	return 0;
1628 }
1629 
enetc_setup_tc_psfp(struct net_device * ndev,void * type_data)1630 int enetc_setup_tc_psfp(struct net_device *ndev, void *type_data)
1631 {
1632 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
1633 	struct flow_block_offload *f = type_data;
1634 	int port, err;
1635 
1636 	err = flow_block_cb_setup_simple(f, &enetc_block_cb_list,
1637 					 enetc_setup_tc_block_cb,
1638 					 ndev, ndev, true);
1639 	if (err)
1640 		return err;
1641 
1642 	switch (f->command) {
1643 	case FLOW_BLOCK_BIND:
1644 		port = enetc_pf_to_port(priv->si->pdev);
1645 		if (port < 0)
1646 			return -EINVAL;
1647 
1648 		set_bit(port, &epsfp.dev_bitmap);
1649 		break;
1650 	case FLOW_BLOCK_UNBIND:
1651 		port = enetc_pf_to_port(priv->si->pdev);
1652 		if (port < 0)
1653 			return -EINVAL;
1654 
1655 		clear_bit(port, &epsfp.dev_bitmap);
1656 		if (!epsfp.dev_bitmap)
1657 			clean_psfp_all();
1658 		break;
1659 	}
1660 
1661 	return 0;
1662 }
1663 
enetc_qos_query_caps(struct net_device * ndev,void * type_data)1664 int enetc_qos_query_caps(struct net_device *ndev, void *type_data)
1665 {
1666 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
1667 	struct tc_query_caps_base *base = type_data;
1668 	struct enetc_si *si = priv->si;
1669 
1670 	switch (base->type) {
1671 	case TC_SETUP_QDISC_MQPRIO: {
1672 		struct tc_mqprio_caps *caps = base->caps;
1673 
1674 		caps->validate_queue_counts = true;
1675 
1676 		return 0;
1677 	}
1678 	case TC_SETUP_QDISC_TAPRIO: {
1679 		struct tc_taprio_caps *caps = base->caps;
1680 
1681 		if (si->hw_features & ENETC_SI_F_QBV)
1682 			caps->supports_queue_max_sdu = true;
1683 
1684 		return 0;
1685 	}
1686 	default:
1687 		return -EOPNOTSUPP;
1688 	}
1689 }
1690