1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /* Copyright 2017-2019 NXP */
3 
4 #include <linux/mdio.h>
5 #include <linux/module.h>
6 #include <linux/fsl/enetc_mdio.h>
7 #include <linux/of_platform.h>
8 #include <linux/of_mdio.h>
9 #include <linux/of_net.h>
10 #include "enetc_ierb.h"
11 #include "enetc_pf.h"
12 
13 #define ENETC_DRV_NAME_STR "ENETC PF driver"
14 
enetc_pf_get_primary_mac_addr(struct enetc_hw * hw,int si,u8 * addr)15 static void enetc_pf_get_primary_mac_addr(struct enetc_hw *hw, int si, u8 *addr)
16 {
17 	u32 upper = __raw_readl(hw->port + ENETC_PSIPMAR0(si));
18 	u16 lower = __raw_readw(hw->port + ENETC_PSIPMAR1(si));
19 
20 	*(u32 *)addr = upper;
21 	*(u16 *)(addr + 4) = lower;
22 }
23 
enetc_pf_set_primary_mac_addr(struct enetc_hw * hw,int si,const u8 * addr)24 static void enetc_pf_set_primary_mac_addr(struct enetc_hw *hw, int si,
25 					  const u8 *addr)
26 {
27 	u32 upper = *(const u32 *)addr;
28 	u16 lower = *(const u16 *)(addr + 4);
29 
30 	__raw_writel(upper, hw->port + ENETC_PSIPMAR0(si));
31 	__raw_writew(lower, hw->port + ENETC_PSIPMAR1(si));
32 }
33 
enetc_pf_set_mac_addr(struct net_device * ndev,void * addr)34 static int enetc_pf_set_mac_addr(struct net_device *ndev, void *addr)
35 {
36 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
37 	struct sockaddr *saddr = addr;
38 
39 	if (!is_valid_ether_addr(saddr->sa_data))
40 		return -EADDRNOTAVAIL;
41 
42 	memcpy(ndev->dev_addr, saddr->sa_data, ndev->addr_len);
43 	enetc_pf_set_primary_mac_addr(&priv->si->hw, 0, saddr->sa_data);
44 
45 	return 0;
46 }
47 
enetc_set_vlan_promisc(struct enetc_hw * hw,char si_map)48 static void enetc_set_vlan_promisc(struct enetc_hw *hw, char si_map)
49 {
50 	u32 val = enetc_port_rd(hw, ENETC_PSIPVMR);
51 
52 	val &= ~ENETC_PSIPVMR_SET_VP(ENETC_VLAN_PROMISC_MAP_ALL);
53 	enetc_port_wr(hw, ENETC_PSIPVMR, ENETC_PSIPVMR_SET_VP(si_map) | val);
54 }
55 
enetc_enable_si_vlan_promisc(struct enetc_pf * pf,int si_idx)56 static void enetc_enable_si_vlan_promisc(struct enetc_pf *pf, int si_idx)
57 {
58 	pf->vlan_promisc_simap |= BIT(si_idx);
59 	enetc_set_vlan_promisc(&pf->si->hw, pf->vlan_promisc_simap);
60 }
61 
enetc_disable_si_vlan_promisc(struct enetc_pf * pf,int si_idx)62 static void enetc_disable_si_vlan_promisc(struct enetc_pf *pf, int si_idx)
63 {
64 	pf->vlan_promisc_simap &= ~BIT(si_idx);
65 	enetc_set_vlan_promisc(&pf->si->hw, pf->vlan_promisc_simap);
66 }
67 
enetc_set_isol_vlan(struct enetc_hw * hw,int si,u16 vlan,u8 qos)68 static void enetc_set_isol_vlan(struct enetc_hw *hw, int si, u16 vlan, u8 qos)
69 {
70 	u32 val = 0;
71 
72 	if (vlan)
73 		val = ENETC_PSIVLAN_EN | ENETC_PSIVLAN_SET_QOS(qos) | vlan;
74 
75 	enetc_port_wr(hw, ENETC_PSIVLANR(si), val);
76 }
77 
enetc_mac_addr_hash_idx(const u8 * addr)78 static int enetc_mac_addr_hash_idx(const u8 *addr)
79 {
80 	u64 fold = __swab64(ether_addr_to_u64(addr)) >> 16;
81 	u64 mask = 0;
82 	int res = 0;
83 	int i;
84 
85 	for (i = 0; i < 8; i++)
86 		mask |= BIT_ULL(i * 6);
87 
88 	for (i = 0; i < 6; i++)
89 		res |= (hweight64(fold & (mask << i)) & 0x1) << i;
90 
91 	return res;
92 }
93 
enetc_reset_mac_addr_filter(struct enetc_mac_filter * filter)94 static void enetc_reset_mac_addr_filter(struct enetc_mac_filter *filter)
95 {
96 	filter->mac_addr_cnt = 0;
97 
98 	bitmap_zero(filter->mac_hash_table,
99 		    ENETC_MADDR_HASH_TBL_SZ);
100 }
101 
enetc_add_mac_addr_em_filter(struct enetc_mac_filter * filter,const unsigned char * addr)102 static void enetc_add_mac_addr_em_filter(struct enetc_mac_filter *filter,
103 					 const unsigned char *addr)
104 {
105 	/* add exact match addr */
106 	ether_addr_copy(filter->mac_addr, addr);
107 	filter->mac_addr_cnt++;
108 }
109 
enetc_add_mac_addr_ht_filter(struct enetc_mac_filter * filter,const unsigned char * addr)110 static void enetc_add_mac_addr_ht_filter(struct enetc_mac_filter *filter,
111 					 const unsigned char *addr)
112 {
113 	int idx = enetc_mac_addr_hash_idx(addr);
114 
115 	/* add hash table entry */
116 	__set_bit(idx, filter->mac_hash_table);
117 	filter->mac_addr_cnt++;
118 }
119 
enetc_clear_mac_ht_flt(struct enetc_si * si,int si_idx,int type)120 static void enetc_clear_mac_ht_flt(struct enetc_si *si, int si_idx, int type)
121 {
122 	bool err = si->errata & ENETC_ERR_UCMCSWP;
123 
124 	if (type == UC) {
125 		enetc_port_wr(&si->hw, ENETC_PSIUMHFR0(si_idx, err), 0);
126 		enetc_port_wr(&si->hw, ENETC_PSIUMHFR1(si_idx), 0);
127 	} else { /* MC */
128 		enetc_port_wr(&si->hw, ENETC_PSIMMHFR0(si_idx, err), 0);
129 		enetc_port_wr(&si->hw, ENETC_PSIMMHFR1(si_idx), 0);
130 	}
131 }
132 
enetc_set_mac_ht_flt(struct enetc_si * si,int si_idx,int type,unsigned long hash)133 static void enetc_set_mac_ht_flt(struct enetc_si *si, int si_idx, int type,
134 				 unsigned long hash)
135 {
136 	bool err = si->errata & ENETC_ERR_UCMCSWP;
137 
138 	if (type == UC) {
139 		enetc_port_wr(&si->hw, ENETC_PSIUMHFR0(si_idx, err),
140 			      lower_32_bits(hash));
141 		enetc_port_wr(&si->hw, ENETC_PSIUMHFR1(si_idx),
142 			      upper_32_bits(hash));
143 	} else { /* MC */
144 		enetc_port_wr(&si->hw, ENETC_PSIMMHFR0(si_idx, err),
145 			      lower_32_bits(hash));
146 		enetc_port_wr(&si->hw, ENETC_PSIMMHFR1(si_idx),
147 			      upper_32_bits(hash));
148 	}
149 }
150 
enetc_sync_mac_filters(struct enetc_pf * pf)151 static void enetc_sync_mac_filters(struct enetc_pf *pf)
152 {
153 	struct enetc_mac_filter *f = pf->mac_filter;
154 	struct enetc_si *si = pf->si;
155 	int i, pos;
156 
157 	pos = EMETC_MAC_ADDR_FILT_RES;
158 
159 	for (i = 0; i < MADDR_TYPE; i++, f++) {
160 		bool em = (f->mac_addr_cnt == 1) && (i == UC);
161 		bool clear = !f->mac_addr_cnt;
162 
163 		if (clear) {
164 			if (i == UC)
165 				enetc_clear_mac_flt_entry(si, pos);
166 
167 			enetc_clear_mac_ht_flt(si, 0, i);
168 			continue;
169 		}
170 
171 		/* exact match filter */
172 		if (em) {
173 			int err;
174 
175 			enetc_clear_mac_ht_flt(si, 0, UC);
176 
177 			err = enetc_set_mac_flt_entry(si, pos, f->mac_addr,
178 						      BIT(0));
179 			if (!err)
180 				continue;
181 
182 			/* fallback to HT filtering */
183 			dev_warn(&si->pdev->dev, "fallback to HT filt (%d)\n",
184 				 err);
185 		}
186 
187 		/* hash table filter, clear EM filter for UC entries */
188 		if (i == UC)
189 			enetc_clear_mac_flt_entry(si, pos);
190 
191 		enetc_set_mac_ht_flt(si, 0, i, *f->mac_hash_table);
192 	}
193 }
194 
enetc_pf_set_rx_mode(struct net_device * ndev)195 static void enetc_pf_set_rx_mode(struct net_device *ndev)
196 {
197 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
198 	struct enetc_pf *pf = enetc_si_priv(priv->si);
199 	struct enetc_hw *hw = &priv->si->hw;
200 	bool uprom = false, mprom = false;
201 	struct enetc_mac_filter *filter;
202 	struct netdev_hw_addr *ha;
203 	u32 psipmr = 0;
204 	bool em;
205 
206 	if (ndev->flags & IFF_PROMISC) {
207 		/* enable promisc mode for SI0 (PF) */
208 		psipmr = ENETC_PSIPMR_SET_UP(0) | ENETC_PSIPMR_SET_MP(0);
209 		uprom = true;
210 		mprom = true;
211 	} else if (ndev->flags & IFF_ALLMULTI) {
212 		/* enable multi cast promisc mode for SI0 (PF) */
213 		psipmr = ENETC_PSIPMR_SET_MP(0);
214 		mprom = true;
215 	}
216 
217 	/* first 2 filter entries belong to PF */
218 	if (!uprom) {
219 		/* Update unicast filters */
220 		filter = &pf->mac_filter[UC];
221 		enetc_reset_mac_addr_filter(filter);
222 
223 		em = (netdev_uc_count(ndev) == 1);
224 		netdev_for_each_uc_addr(ha, ndev) {
225 			if (em) {
226 				enetc_add_mac_addr_em_filter(filter, ha->addr);
227 				break;
228 			}
229 
230 			enetc_add_mac_addr_ht_filter(filter, ha->addr);
231 		}
232 	}
233 
234 	if (!mprom) {
235 		/* Update multicast filters */
236 		filter = &pf->mac_filter[MC];
237 		enetc_reset_mac_addr_filter(filter);
238 
239 		netdev_for_each_mc_addr(ha, ndev) {
240 			if (!is_multicast_ether_addr(ha->addr))
241 				continue;
242 
243 			enetc_add_mac_addr_ht_filter(filter, ha->addr);
244 		}
245 	}
246 
247 	if (!uprom || !mprom)
248 		/* update PF entries */
249 		enetc_sync_mac_filters(pf);
250 
251 	psipmr |= enetc_port_rd(hw, ENETC_PSIPMR) &
252 		  ~(ENETC_PSIPMR_SET_UP(0) | ENETC_PSIPMR_SET_MP(0));
253 	enetc_port_wr(hw, ENETC_PSIPMR, psipmr);
254 }
255 
enetc_set_vlan_ht_filter(struct enetc_hw * hw,int si_idx,unsigned long hash)256 static void enetc_set_vlan_ht_filter(struct enetc_hw *hw, int si_idx,
257 				     unsigned long hash)
258 {
259 	enetc_port_wr(hw, ENETC_PSIVHFR0(si_idx), lower_32_bits(hash));
260 	enetc_port_wr(hw, ENETC_PSIVHFR1(si_idx), upper_32_bits(hash));
261 }
262 
enetc_vid_hash_idx(unsigned int vid)263 static int enetc_vid_hash_idx(unsigned int vid)
264 {
265 	int res = 0;
266 	int i;
267 
268 	for (i = 0; i < 6; i++)
269 		res |= (hweight8(vid & (BIT(i) | BIT(i + 6))) & 0x1) << i;
270 
271 	return res;
272 }
273 
enetc_sync_vlan_ht_filter(struct enetc_pf * pf,bool rehash)274 static void enetc_sync_vlan_ht_filter(struct enetc_pf *pf, bool rehash)
275 {
276 	int i;
277 
278 	if (rehash) {
279 		bitmap_zero(pf->vlan_ht_filter, ENETC_VLAN_HT_SIZE);
280 
281 		for_each_set_bit(i, pf->active_vlans, VLAN_N_VID) {
282 			int hidx = enetc_vid_hash_idx(i);
283 
284 			__set_bit(hidx, pf->vlan_ht_filter);
285 		}
286 	}
287 
288 	enetc_set_vlan_ht_filter(&pf->si->hw, 0, *pf->vlan_ht_filter);
289 }
290 
enetc_vlan_rx_add_vid(struct net_device * ndev,__be16 prot,u16 vid)291 static int enetc_vlan_rx_add_vid(struct net_device *ndev, __be16 prot, u16 vid)
292 {
293 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
294 	struct enetc_pf *pf = enetc_si_priv(priv->si);
295 	int idx;
296 
297 	__set_bit(vid, pf->active_vlans);
298 
299 	idx = enetc_vid_hash_idx(vid);
300 	if (!__test_and_set_bit(idx, pf->vlan_ht_filter))
301 		enetc_sync_vlan_ht_filter(pf, false);
302 
303 	return 0;
304 }
305 
enetc_vlan_rx_del_vid(struct net_device * ndev,__be16 prot,u16 vid)306 static int enetc_vlan_rx_del_vid(struct net_device *ndev, __be16 prot, u16 vid)
307 {
308 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
309 	struct enetc_pf *pf = enetc_si_priv(priv->si);
310 
311 	__clear_bit(vid, pf->active_vlans);
312 	enetc_sync_vlan_ht_filter(pf, true);
313 
314 	return 0;
315 }
316 
enetc_set_loopback(struct net_device * ndev,bool en)317 static void enetc_set_loopback(struct net_device *ndev, bool en)
318 {
319 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
320 	struct enetc_hw *hw = &priv->si->hw;
321 	u32 reg;
322 
323 	reg = enetc_port_rd(hw, ENETC_PM0_IF_MODE);
324 	if (reg & ENETC_PM0_IFM_RG) {
325 		/* RGMII mode */
326 		reg = (reg & ~ENETC_PM0_IFM_RLP) |
327 		      (en ? ENETC_PM0_IFM_RLP : 0);
328 		enetc_port_wr(hw, ENETC_PM0_IF_MODE, reg);
329 	} else {
330 		/* assume SGMII mode */
331 		reg = enetc_port_rd(hw, ENETC_PM0_CMD_CFG);
332 		reg = (reg & ~ENETC_PM0_CMD_XGLP) |
333 		      (en ? ENETC_PM0_CMD_XGLP : 0);
334 		reg = (reg & ~ENETC_PM0_CMD_PHY_TX_EN) |
335 		      (en ? ENETC_PM0_CMD_PHY_TX_EN : 0);
336 		enetc_port_wr(hw, ENETC_PM0_CMD_CFG, reg);
337 		enetc_port_wr(hw, ENETC_PM1_CMD_CFG, reg);
338 	}
339 }
340 
enetc_pf_set_vf_mac(struct net_device * ndev,int vf,u8 * mac)341 static int enetc_pf_set_vf_mac(struct net_device *ndev, int vf, u8 *mac)
342 {
343 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
344 	struct enetc_pf *pf = enetc_si_priv(priv->si);
345 	struct enetc_vf_state *vf_state;
346 
347 	if (vf >= pf->total_vfs)
348 		return -EINVAL;
349 
350 	if (!is_valid_ether_addr(mac))
351 		return -EADDRNOTAVAIL;
352 
353 	vf_state = &pf->vf_state[vf];
354 	vf_state->flags |= ENETC_VF_FLAG_PF_SET_MAC;
355 	enetc_pf_set_primary_mac_addr(&priv->si->hw, vf + 1, mac);
356 	return 0;
357 }
358 
enetc_pf_set_vf_vlan(struct net_device * ndev,int vf,u16 vlan,u8 qos,__be16 proto)359 static int enetc_pf_set_vf_vlan(struct net_device *ndev, int vf, u16 vlan,
360 				u8 qos, __be16 proto)
361 {
362 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
363 	struct enetc_pf *pf = enetc_si_priv(priv->si);
364 
365 	if (priv->si->errata & ENETC_ERR_VLAN_ISOL)
366 		return -EOPNOTSUPP;
367 
368 	if (vf >= pf->total_vfs)
369 		return -EINVAL;
370 
371 	if (proto != htons(ETH_P_8021Q))
372 		/* only C-tags supported for now */
373 		return -EPROTONOSUPPORT;
374 
375 	enetc_set_isol_vlan(&priv->si->hw, vf + 1, vlan, qos);
376 	return 0;
377 }
378 
enetc_pf_set_vf_spoofchk(struct net_device * ndev,int vf,bool en)379 static int enetc_pf_set_vf_spoofchk(struct net_device *ndev, int vf, bool en)
380 {
381 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
382 	struct enetc_pf *pf = enetc_si_priv(priv->si);
383 	u32 cfgr;
384 
385 	if (vf >= pf->total_vfs)
386 		return -EINVAL;
387 
388 	cfgr = enetc_port_rd(&priv->si->hw, ENETC_PSICFGR0(vf + 1));
389 	cfgr = (cfgr & ~ENETC_PSICFGR0_ASE) | (en ? ENETC_PSICFGR0_ASE : 0);
390 	enetc_port_wr(&priv->si->hw, ENETC_PSICFGR0(vf + 1), cfgr);
391 
392 	return 0;
393 }
394 
enetc_setup_mac_address(struct device_node * np,struct enetc_pf * pf,int si)395 static int enetc_setup_mac_address(struct device_node *np, struct enetc_pf *pf,
396 				   int si)
397 {
398 	struct device *dev = &pf->si->pdev->dev;
399 	struct enetc_hw *hw = &pf->si->hw;
400 	u8 mac_addr[ETH_ALEN] = { 0 };
401 	int err;
402 
403 	/* (1) try to get the MAC address from the device tree */
404 	if (np) {
405 		err = of_get_mac_address(np, mac_addr);
406 		if (err == -EPROBE_DEFER)
407 			return err;
408 	}
409 
410 	/* (2) bootloader supplied MAC address */
411 	if (is_zero_ether_addr(mac_addr))
412 		enetc_pf_get_primary_mac_addr(hw, si, mac_addr);
413 
414 	/* (3) choose a random one */
415 	if (is_zero_ether_addr(mac_addr)) {
416 		eth_random_addr(mac_addr);
417 		dev_info(dev, "no MAC address specified for SI%d, using %pM\n",
418 			 si, mac_addr);
419 	}
420 
421 	enetc_pf_set_primary_mac_addr(hw, si, mac_addr);
422 
423 	return 0;
424 }
425 
enetc_setup_mac_addresses(struct device_node * np,struct enetc_pf * pf)426 static int enetc_setup_mac_addresses(struct device_node *np,
427 				     struct enetc_pf *pf)
428 {
429 	int err, i;
430 
431 	/* The PF might take its MAC from the device tree */
432 	err = enetc_setup_mac_address(np, pf, 0);
433 	if (err)
434 		return err;
435 
436 	for (i = 0; i < pf->total_vfs; i++) {
437 		err = enetc_setup_mac_address(NULL, pf, i + 1);
438 		if (err)
439 			return err;
440 	}
441 
442 	return 0;
443 }
444 
enetc_port_assign_rfs_entries(struct enetc_si * si)445 static void enetc_port_assign_rfs_entries(struct enetc_si *si)
446 {
447 	struct enetc_pf *pf = enetc_si_priv(si);
448 	struct enetc_hw *hw = &si->hw;
449 	int num_entries, vf_entries, i;
450 	u32 val;
451 
452 	/* split RFS entries between functions */
453 	val = enetc_port_rd(hw, ENETC_PRFSCAPR);
454 	num_entries = ENETC_PRFSCAPR_GET_NUM_RFS(val);
455 	vf_entries = num_entries / (pf->total_vfs + 1);
456 
457 	for (i = 0; i < pf->total_vfs; i++)
458 		enetc_port_wr(hw, ENETC_PSIRFSCFGR(i + 1), vf_entries);
459 	enetc_port_wr(hw, ENETC_PSIRFSCFGR(0),
460 		      num_entries - vf_entries * pf->total_vfs);
461 
462 	/* enable RFS on port */
463 	enetc_port_wr(hw, ENETC_PRFSMR, ENETC_PRFSMR_RFSE);
464 }
465 
enetc_port_si_configure(struct enetc_si * si)466 static void enetc_port_si_configure(struct enetc_si *si)
467 {
468 	struct enetc_pf *pf = enetc_si_priv(si);
469 	struct enetc_hw *hw = &si->hw;
470 	int num_rings, i;
471 	u32 val;
472 
473 	val = enetc_port_rd(hw, ENETC_PCAPR0);
474 	num_rings = min(ENETC_PCAPR0_RXBDR(val), ENETC_PCAPR0_TXBDR(val));
475 
476 	val = ENETC_PSICFGR0_SET_TXBDR(ENETC_PF_NUM_RINGS);
477 	val |= ENETC_PSICFGR0_SET_RXBDR(ENETC_PF_NUM_RINGS);
478 
479 	if (unlikely(num_rings < ENETC_PF_NUM_RINGS)) {
480 		val = ENETC_PSICFGR0_SET_TXBDR(num_rings);
481 		val |= ENETC_PSICFGR0_SET_RXBDR(num_rings);
482 
483 		dev_warn(&si->pdev->dev, "Found %d rings, expected %d!\n",
484 			 num_rings, ENETC_PF_NUM_RINGS);
485 
486 		num_rings = 0;
487 	}
488 
489 	/* Add default one-time settings for SI0 (PF) */
490 	val |= ENETC_PSICFGR0_SIVC(ENETC_VLAN_TYPE_C | ENETC_VLAN_TYPE_S);
491 
492 	enetc_port_wr(hw, ENETC_PSICFGR0(0), val);
493 
494 	if (num_rings)
495 		num_rings -= ENETC_PF_NUM_RINGS;
496 
497 	/* Configure the SIs for each available VF */
498 	val = ENETC_PSICFGR0_SIVC(ENETC_VLAN_TYPE_C | ENETC_VLAN_TYPE_S);
499 	val |= ENETC_PSICFGR0_VTE | ENETC_PSICFGR0_SIVIE;
500 
501 	if (num_rings) {
502 		num_rings /= pf->total_vfs;
503 		val |= ENETC_PSICFGR0_SET_TXBDR(num_rings);
504 		val |= ENETC_PSICFGR0_SET_RXBDR(num_rings);
505 	}
506 
507 	for (i = 0; i < pf->total_vfs; i++)
508 		enetc_port_wr(hw, ENETC_PSICFGR0(i + 1), val);
509 
510 	/* Port level VLAN settings */
511 	val = ENETC_PVCLCTR_OVTPIDL(ENETC_VLAN_TYPE_C | ENETC_VLAN_TYPE_S);
512 	enetc_port_wr(hw, ENETC_PVCLCTR, val);
513 	/* use outer tag for VLAN filtering */
514 	enetc_port_wr(hw, ENETC_PSIVLANFMR, ENETC_PSIVLANFMR_VS);
515 }
516 
enetc_configure_port_mac(struct enetc_hw * hw)517 static void enetc_configure_port_mac(struct enetc_hw *hw)
518 {
519 	enetc_port_wr(hw, ENETC_PM0_MAXFRM,
520 		      ENETC_SET_MAXFRM(ENETC_RX_MAXFRM_SIZE));
521 
522 	enetc_port_wr(hw, ENETC_PTCMSDUR(0), ENETC_MAC_MAXFRM_SIZE);
523 
524 	enetc_port_wr(hw, ENETC_PM0_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN |
525 		      ENETC_PM0_CMD_TXP	| ENETC_PM0_PROMISC);
526 
527 	enetc_port_wr(hw, ENETC_PM1_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN |
528 		      ENETC_PM0_CMD_TXP	| ENETC_PM0_PROMISC);
529 
530 	/* On LS1028A, the MAC RX FIFO defaults to 2, which is too high
531 	 * and may lead to RX lock-up under traffic. Set it to 1 instead,
532 	 * as recommended by the hardware team.
533 	 */
534 	enetc_port_wr(hw, ENETC_PM0_RX_FIFO, ENETC_PM0_RX_FIFO_VAL);
535 }
536 
enetc_mac_config(struct enetc_hw * hw,phy_interface_t phy_mode)537 static void enetc_mac_config(struct enetc_hw *hw, phy_interface_t phy_mode)
538 {
539 	u32 val;
540 
541 	if (phy_interface_mode_is_rgmii(phy_mode)) {
542 		val = enetc_port_rd(hw, ENETC_PM0_IF_MODE);
543 		val &= ~ENETC_PM0_IFM_EN_AUTO;
544 		val &= ENETC_PM0_IFM_IFMODE_MASK;
545 		val |= ENETC_PM0_IFM_IFMODE_GMII | ENETC_PM0_IFM_RG;
546 		enetc_port_wr(hw, ENETC_PM0_IF_MODE, val);
547 	}
548 
549 	if (phy_mode == PHY_INTERFACE_MODE_USXGMII) {
550 		val = ENETC_PM0_IFM_FULL_DPX | ENETC_PM0_IFM_IFMODE_XGMII;
551 		enetc_port_wr(hw, ENETC_PM0_IF_MODE, val);
552 	}
553 }
554 
enetc_mac_enable(struct enetc_hw * hw,bool en)555 static void enetc_mac_enable(struct enetc_hw *hw, bool en)
556 {
557 	u32 val = enetc_port_rd(hw, ENETC_PM0_CMD_CFG);
558 
559 	val &= ~(ENETC_PM0_TX_EN | ENETC_PM0_RX_EN);
560 	val |= en ? (ENETC_PM0_TX_EN | ENETC_PM0_RX_EN) : 0;
561 
562 	enetc_port_wr(hw, ENETC_PM0_CMD_CFG, val);
563 	enetc_port_wr(hw, ENETC_PM1_CMD_CFG, val);
564 }
565 
enetc_configure_port_pmac(struct enetc_hw * hw)566 static void enetc_configure_port_pmac(struct enetc_hw *hw)
567 {
568 	u32 temp;
569 
570 	/* Set pMAC step lock */
571 	temp = enetc_port_rd(hw, ENETC_PFPMR);
572 	enetc_port_wr(hw, ENETC_PFPMR,
573 		      temp | ENETC_PFPMR_PMACE | ENETC_PFPMR_MWLM);
574 
575 	temp = enetc_port_rd(hw, ENETC_MMCSR);
576 	enetc_port_wr(hw, ENETC_MMCSR, temp | ENETC_MMCSR_ME);
577 }
578 
enetc_configure_port(struct enetc_pf * pf)579 static void enetc_configure_port(struct enetc_pf *pf)
580 {
581 	u8 hash_key[ENETC_RSSHASH_KEY_SIZE];
582 	struct enetc_hw *hw = &pf->si->hw;
583 
584 	enetc_configure_port_pmac(hw);
585 
586 	enetc_configure_port_mac(hw);
587 
588 	enetc_port_si_configure(pf->si);
589 
590 	/* set up hash key */
591 	get_random_bytes(hash_key, ENETC_RSSHASH_KEY_SIZE);
592 	enetc_set_rss_key(hw, hash_key);
593 
594 	/* split up RFS entries */
595 	enetc_port_assign_rfs_entries(pf->si);
596 
597 	/* enforce VLAN promisc mode for all SIs */
598 	pf->vlan_promisc_simap = ENETC_VLAN_PROMISC_MAP_ALL;
599 	enetc_set_vlan_promisc(hw, pf->vlan_promisc_simap);
600 
601 	enetc_port_wr(hw, ENETC_PSIPMR, 0);
602 
603 	/* enable port */
604 	enetc_port_wr(hw, ENETC_PMR, ENETC_PMR_EN);
605 }
606 
607 /* Messaging */
enetc_msg_pf_set_vf_primary_mac_addr(struct enetc_pf * pf,int vf_id)608 static u16 enetc_msg_pf_set_vf_primary_mac_addr(struct enetc_pf *pf,
609 						int vf_id)
610 {
611 	struct enetc_vf_state *vf_state = &pf->vf_state[vf_id];
612 	struct enetc_msg_swbd *msg = &pf->rxmsg[vf_id];
613 	struct enetc_msg_cmd_set_primary_mac *cmd;
614 	struct device *dev = &pf->si->pdev->dev;
615 	u16 cmd_id;
616 	char *addr;
617 
618 	cmd = (struct enetc_msg_cmd_set_primary_mac *)msg->vaddr;
619 	cmd_id = cmd->header.id;
620 	if (cmd_id != ENETC_MSG_CMD_MNG_ADD)
621 		return ENETC_MSG_CMD_STATUS_FAIL;
622 
623 	addr = cmd->mac.sa_data;
624 	if (vf_state->flags & ENETC_VF_FLAG_PF_SET_MAC)
625 		dev_warn(dev, "Attempt to override PF set mac addr for VF%d\n",
626 			 vf_id);
627 	else
628 		enetc_pf_set_primary_mac_addr(&pf->si->hw, vf_id + 1, addr);
629 
630 	return ENETC_MSG_CMD_STATUS_OK;
631 }
632 
enetc_msg_handle_rxmsg(struct enetc_pf * pf,int vf_id,u16 * status)633 void enetc_msg_handle_rxmsg(struct enetc_pf *pf, int vf_id, u16 *status)
634 {
635 	struct enetc_msg_swbd *msg = &pf->rxmsg[vf_id];
636 	struct device *dev = &pf->si->pdev->dev;
637 	struct enetc_msg_cmd_header *cmd_hdr;
638 	u16 cmd_type;
639 
640 	*status = ENETC_MSG_CMD_STATUS_OK;
641 	cmd_hdr = (struct enetc_msg_cmd_header *)msg->vaddr;
642 	cmd_type = cmd_hdr->type;
643 
644 	switch (cmd_type) {
645 	case ENETC_MSG_CMD_MNG_MAC:
646 		*status = enetc_msg_pf_set_vf_primary_mac_addr(pf, vf_id);
647 		break;
648 	default:
649 		dev_err(dev, "command not supported (cmd_type: 0x%x)\n",
650 			cmd_type);
651 	}
652 }
653 
654 #ifdef CONFIG_PCI_IOV
enetc_sriov_configure(struct pci_dev * pdev,int num_vfs)655 static int enetc_sriov_configure(struct pci_dev *pdev, int num_vfs)
656 {
657 	struct enetc_si *si = pci_get_drvdata(pdev);
658 	struct enetc_pf *pf = enetc_si_priv(si);
659 	int err;
660 
661 	if (!num_vfs) {
662 		enetc_msg_psi_free(pf);
663 		kfree(pf->vf_state);
664 		pf->num_vfs = 0;
665 		pci_disable_sriov(pdev);
666 	} else {
667 		pf->num_vfs = num_vfs;
668 
669 		pf->vf_state = kcalloc(num_vfs, sizeof(struct enetc_vf_state),
670 				       GFP_KERNEL);
671 		if (!pf->vf_state) {
672 			pf->num_vfs = 0;
673 			return -ENOMEM;
674 		}
675 
676 		err = enetc_msg_psi_init(pf);
677 		if (err) {
678 			dev_err(&pdev->dev, "enetc_msg_psi_init (%d)\n", err);
679 			goto err_msg_psi;
680 		}
681 
682 		err = pci_enable_sriov(pdev, num_vfs);
683 		if (err) {
684 			dev_err(&pdev->dev, "pci_enable_sriov err %d\n", err);
685 			goto err_en_sriov;
686 		}
687 	}
688 
689 	return num_vfs;
690 
691 err_en_sriov:
692 	enetc_msg_psi_free(pf);
693 err_msg_psi:
694 	kfree(pf->vf_state);
695 	pf->num_vfs = 0;
696 
697 	return err;
698 }
699 #else
700 #define enetc_sriov_configure(pdev, num_vfs)	(void)0
701 #endif
702 
enetc_pf_set_features(struct net_device * ndev,netdev_features_t features)703 static int enetc_pf_set_features(struct net_device *ndev,
704 				 netdev_features_t features)
705 {
706 	netdev_features_t changed = ndev->features ^ features;
707 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
708 
709 	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
710 		struct enetc_pf *pf = enetc_si_priv(priv->si);
711 
712 		if (!!(features & NETIF_F_HW_VLAN_CTAG_FILTER))
713 			enetc_disable_si_vlan_promisc(pf, 0);
714 		else
715 			enetc_enable_si_vlan_promisc(pf, 0);
716 	}
717 
718 	if (changed & NETIF_F_LOOPBACK)
719 		enetc_set_loopback(ndev, !!(features & NETIF_F_LOOPBACK));
720 
721 	return enetc_set_features(ndev, features);
722 }
723 
724 static const struct net_device_ops enetc_ndev_ops = {
725 	.ndo_open		= enetc_open,
726 	.ndo_stop		= enetc_close,
727 	.ndo_start_xmit		= enetc_xmit,
728 	.ndo_get_stats		= enetc_get_stats,
729 	.ndo_set_mac_address	= enetc_pf_set_mac_addr,
730 	.ndo_set_rx_mode	= enetc_pf_set_rx_mode,
731 	.ndo_vlan_rx_add_vid	= enetc_vlan_rx_add_vid,
732 	.ndo_vlan_rx_kill_vid	= enetc_vlan_rx_del_vid,
733 	.ndo_set_vf_mac		= enetc_pf_set_vf_mac,
734 	.ndo_set_vf_vlan	= enetc_pf_set_vf_vlan,
735 	.ndo_set_vf_spoofchk	= enetc_pf_set_vf_spoofchk,
736 	.ndo_set_features	= enetc_pf_set_features,
737 	.ndo_do_ioctl		= enetc_ioctl,
738 	.ndo_setup_tc		= enetc_setup_tc,
739 	.ndo_bpf		= enetc_setup_bpf,
740 	.ndo_xdp_xmit		= enetc_xdp_xmit,
741 };
742 
enetc_pf_netdev_setup(struct enetc_si * si,struct net_device * ndev,const struct net_device_ops * ndev_ops)743 static void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
744 				  const struct net_device_ops *ndev_ops)
745 {
746 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
747 
748 	SET_NETDEV_DEV(ndev, &si->pdev->dev);
749 	priv->ndev = ndev;
750 	priv->si = si;
751 	priv->dev = &si->pdev->dev;
752 	si->ndev = ndev;
753 
754 	priv->msg_enable = (NETIF_MSG_WOL << 1) - 1;
755 	ndev->netdev_ops = ndev_ops;
756 	enetc_set_ethtool_ops(ndev);
757 	ndev->watchdog_timeo = 5 * HZ;
758 	ndev->max_mtu = ENETC_MAX_MTU;
759 
760 	ndev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
761 			    NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
762 			    NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK;
763 	ndev->features = NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_RXCSUM |
764 			 NETIF_F_HW_VLAN_CTAG_TX |
765 			 NETIF_F_HW_VLAN_CTAG_RX;
766 
767 	if (si->num_rss)
768 		ndev->hw_features |= NETIF_F_RXHASH;
769 
770 	ndev->priv_flags |= IFF_UNICAST_FLT;
771 
772 	if (si->hw_features & ENETC_SI_F_QBV)
773 		priv->active_offloads |= ENETC_F_QBV;
774 
775 	if (si->hw_features & ENETC_SI_F_PSFP && !enetc_psfp_enable(priv)) {
776 		priv->active_offloads |= ENETC_F_QCI;
777 		ndev->features |= NETIF_F_HW_TC;
778 		ndev->hw_features |= NETIF_F_HW_TC;
779 	}
780 
781 	/* pick up primary MAC address from SI */
782 	enetc_get_primary_mac_addr(&si->hw, ndev->dev_addr);
783 }
784 
enetc_mdio_probe(struct enetc_pf * pf,struct device_node * np)785 static int enetc_mdio_probe(struct enetc_pf *pf, struct device_node *np)
786 {
787 	struct device *dev = &pf->si->pdev->dev;
788 	struct enetc_mdio_priv *mdio_priv;
789 	struct mii_bus *bus;
790 	int err;
791 
792 	bus = devm_mdiobus_alloc_size(dev, sizeof(*mdio_priv));
793 	if (!bus)
794 		return -ENOMEM;
795 
796 	bus->name = "Freescale ENETC MDIO Bus";
797 	bus->read = enetc_mdio_read;
798 	bus->write = enetc_mdio_write;
799 	bus->parent = dev;
800 	mdio_priv = bus->priv;
801 	mdio_priv->hw = &pf->si->hw;
802 	mdio_priv->mdio_base = ENETC_EMDIO_BASE;
803 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
804 
805 	err = of_mdiobus_register(bus, np);
806 	if (err) {
807 		dev_err(dev, "cannot register MDIO bus\n");
808 		return err;
809 	}
810 
811 	pf->mdio = bus;
812 
813 	return 0;
814 }
815 
enetc_mdio_remove(struct enetc_pf * pf)816 static void enetc_mdio_remove(struct enetc_pf *pf)
817 {
818 	if (pf->mdio)
819 		mdiobus_unregister(pf->mdio);
820 }
821 
enetc_imdio_create(struct enetc_pf * pf)822 static int enetc_imdio_create(struct enetc_pf *pf)
823 {
824 	struct device *dev = &pf->si->pdev->dev;
825 	struct enetc_mdio_priv *mdio_priv;
826 	struct lynx_pcs *pcs_lynx;
827 	struct mdio_device *pcs;
828 	struct mii_bus *bus;
829 	int err;
830 
831 	bus = mdiobus_alloc_size(sizeof(*mdio_priv));
832 	if (!bus)
833 		return -ENOMEM;
834 
835 	bus->name = "Freescale ENETC internal MDIO Bus";
836 	bus->read = enetc_mdio_read;
837 	bus->write = enetc_mdio_write;
838 	bus->parent = dev;
839 	bus->phy_mask = ~0;
840 	mdio_priv = bus->priv;
841 	mdio_priv->hw = &pf->si->hw;
842 	mdio_priv->mdio_base = ENETC_PM_IMDIO_BASE;
843 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-imdio", dev_name(dev));
844 
845 	err = mdiobus_register(bus);
846 	if (err) {
847 		dev_err(dev, "cannot register internal MDIO bus (%d)\n", err);
848 		goto free_mdio_bus;
849 	}
850 
851 	pcs = mdio_device_create(bus, 0);
852 	if (IS_ERR(pcs)) {
853 		err = PTR_ERR(pcs);
854 		dev_err(dev, "cannot create pcs (%d)\n", err);
855 		goto unregister_mdiobus;
856 	}
857 
858 	pcs_lynx = lynx_pcs_create(pcs);
859 	if (!pcs_lynx) {
860 		mdio_device_free(pcs);
861 		err = -ENOMEM;
862 		dev_err(dev, "cannot create lynx pcs (%d)\n", err);
863 		goto unregister_mdiobus;
864 	}
865 
866 	pf->imdio = bus;
867 	pf->pcs = pcs_lynx;
868 
869 	return 0;
870 
871 unregister_mdiobus:
872 	mdiobus_unregister(bus);
873 free_mdio_bus:
874 	mdiobus_free(bus);
875 	return err;
876 }
877 
enetc_imdio_remove(struct enetc_pf * pf)878 static void enetc_imdio_remove(struct enetc_pf *pf)
879 {
880 	if (pf->pcs) {
881 		mdio_device_free(pf->pcs->mdio);
882 		lynx_pcs_destroy(pf->pcs);
883 	}
884 	if (pf->imdio) {
885 		mdiobus_unregister(pf->imdio);
886 		mdiobus_free(pf->imdio);
887 	}
888 }
889 
enetc_port_has_pcs(struct enetc_pf * pf)890 static bool enetc_port_has_pcs(struct enetc_pf *pf)
891 {
892 	return (pf->if_mode == PHY_INTERFACE_MODE_SGMII ||
893 		pf->if_mode == PHY_INTERFACE_MODE_2500BASEX ||
894 		pf->if_mode == PHY_INTERFACE_MODE_USXGMII);
895 }
896 
enetc_mdiobus_create(struct enetc_pf * pf,struct device_node * node)897 static int enetc_mdiobus_create(struct enetc_pf *pf, struct device_node *node)
898 {
899 	struct device_node *mdio_np;
900 	int err;
901 
902 	mdio_np = of_get_child_by_name(node, "mdio");
903 	if (mdio_np) {
904 		err = enetc_mdio_probe(pf, mdio_np);
905 
906 		of_node_put(mdio_np);
907 		if (err)
908 			return err;
909 	}
910 
911 	if (enetc_port_has_pcs(pf)) {
912 		err = enetc_imdio_create(pf);
913 		if (err) {
914 			enetc_mdio_remove(pf);
915 			return err;
916 		}
917 	}
918 
919 	return 0;
920 }
921 
enetc_mdiobus_destroy(struct enetc_pf * pf)922 static void enetc_mdiobus_destroy(struct enetc_pf *pf)
923 {
924 	enetc_mdio_remove(pf);
925 	enetc_imdio_remove(pf);
926 }
927 
enetc_pl_mac_validate(struct phylink_config * config,unsigned long * supported,struct phylink_link_state * state)928 static void enetc_pl_mac_validate(struct phylink_config *config,
929 				  unsigned long *supported,
930 				  struct phylink_link_state *state)
931 {
932 	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
933 
934 	if (state->interface != PHY_INTERFACE_MODE_NA &&
935 	    state->interface != PHY_INTERFACE_MODE_INTERNAL &&
936 	    state->interface != PHY_INTERFACE_MODE_SGMII &&
937 	    state->interface != PHY_INTERFACE_MODE_2500BASEX &&
938 	    state->interface != PHY_INTERFACE_MODE_USXGMII &&
939 	    !phy_interface_mode_is_rgmii(state->interface)) {
940 		bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
941 		return;
942 	}
943 
944 	phylink_set_port_modes(mask);
945 	phylink_set(mask, Autoneg);
946 	phylink_set(mask, Pause);
947 	phylink_set(mask, Asym_Pause);
948 	phylink_set(mask, 10baseT_Half);
949 	phylink_set(mask, 10baseT_Full);
950 	phylink_set(mask, 100baseT_Half);
951 	phylink_set(mask, 100baseT_Full);
952 	phylink_set(mask, 100baseT_Half);
953 	phylink_set(mask, 1000baseT_Half);
954 	phylink_set(mask, 1000baseT_Full);
955 
956 	if (state->interface == PHY_INTERFACE_MODE_INTERNAL ||
957 	    state->interface == PHY_INTERFACE_MODE_2500BASEX ||
958 	    state->interface == PHY_INTERFACE_MODE_USXGMII) {
959 		phylink_set(mask, 2500baseT_Full);
960 		phylink_set(mask, 2500baseX_Full);
961 	}
962 
963 	bitmap_and(supported, supported, mask,
964 		   __ETHTOOL_LINK_MODE_MASK_NBITS);
965 	bitmap_and(state->advertising, state->advertising, mask,
966 		   __ETHTOOL_LINK_MODE_MASK_NBITS);
967 }
968 
enetc_pl_mac_config(struct phylink_config * config,unsigned int mode,const struct phylink_link_state * state)969 static void enetc_pl_mac_config(struct phylink_config *config,
970 				unsigned int mode,
971 				const struct phylink_link_state *state)
972 {
973 	struct enetc_pf *pf = phylink_to_enetc_pf(config);
974 	struct enetc_ndev_priv *priv;
975 
976 	enetc_mac_config(&pf->si->hw, state->interface);
977 
978 	priv = netdev_priv(pf->si->ndev);
979 	if (pf->pcs)
980 		phylink_set_pcs(priv->phylink, &pf->pcs->pcs);
981 }
982 
enetc_force_rgmii_mac(struct enetc_hw * hw,int speed,int duplex)983 static void enetc_force_rgmii_mac(struct enetc_hw *hw, int speed, int duplex)
984 {
985 	u32 old_val, val;
986 
987 	old_val = val = enetc_port_rd(hw, ENETC_PM0_IF_MODE);
988 
989 	if (speed == SPEED_1000) {
990 		val &= ~ENETC_PM0_IFM_SSP_MASK;
991 		val |= ENETC_PM0_IFM_SSP_1000;
992 	} else if (speed == SPEED_100) {
993 		val &= ~ENETC_PM0_IFM_SSP_MASK;
994 		val |= ENETC_PM0_IFM_SSP_100;
995 	} else if (speed == SPEED_10) {
996 		val &= ~ENETC_PM0_IFM_SSP_MASK;
997 		val |= ENETC_PM0_IFM_SSP_10;
998 	}
999 
1000 	if (duplex == DUPLEX_FULL)
1001 		val |= ENETC_PM0_IFM_FULL_DPX;
1002 	else
1003 		val &= ~ENETC_PM0_IFM_FULL_DPX;
1004 
1005 	if (val == old_val)
1006 		return;
1007 
1008 	enetc_port_wr(hw, ENETC_PM0_IF_MODE, val);
1009 }
1010 
enetc_pl_mac_link_up(struct phylink_config * config,struct phy_device * phy,unsigned int mode,phy_interface_t interface,int speed,int duplex,bool tx_pause,bool rx_pause)1011 static void enetc_pl_mac_link_up(struct phylink_config *config,
1012 				 struct phy_device *phy, unsigned int mode,
1013 				 phy_interface_t interface, int speed,
1014 				 int duplex, bool tx_pause, bool rx_pause)
1015 {
1016 	struct enetc_pf *pf = phylink_to_enetc_pf(config);
1017 	u32 pause_off_thresh = 0, pause_on_thresh = 0;
1018 	u32 init_quanta = 0, refresh_quanta = 0;
1019 	struct enetc_hw *hw = &pf->si->hw;
1020 	struct enetc_ndev_priv *priv;
1021 	u32 rbmr, cmd_cfg;
1022 	int idx;
1023 
1024 	priv = netdev_priv(pf->si->ndev);
1025 	if (priv->active_offloads & ENETC_F_QBV)
1026 		enetc_sched_speed_set(priv, speed);
1027 
1028 	if (!phylink_autoneg_inband(mode) &&
1029 	    phy_interface_mode_is_rgmii(interface))
1030 		enetc_force_rgmii_mac(hw, speed, duplex);
1031 
1032 	/* Flow control */
1033 	for (idx = 0; idx < priv->num_rx_rings; idx++) {
1034 		rbmr = enetc_rxbdr_rd(hw, idx, ENETC_RBMR);
1035 
1036 		if (tx_pause)
1037 			rbmr |= ENETC_RBMR_CM;
1038 		else
1039 			rbmr &= ~ENETC_RBMR_CM;
1040 
1041 		enetc_rxbdr_wr(hw, idx, ENETC_RBMR, rbmr);
1042 	}
1043 
1044 	if (tx_pause) {
1045 		/* When the port first enters congestion, send a PAUSE request
1046 		 * with the maximum number of quanta. When the port exits
1047 		 * congestion, it will automatically send a PAUSE frame with
1048 		 * zero quanta.
1049 		 */
1050 		init_quanta = 0xffff;
1051 
1052 		/* Also, set up the refresh timer to send follow-up PAUSE
1053 		 * frames at half the quanta value, in case the congestion
1054 		 * condition persists.
1055 		 */
1056 		refresh_quanta = 0xffff / 2;
1057 
1058 		/* Start emitting PAUSE frames when 3 large frames (or more
1059 		 * smaller frames) have accumulated in the FIFO waiting to be
1060 		 * DMAed to the RX ring.
1061 		 */
1062 		pause_on_thresh = 3 * ENETC_MAC_MAXFRM_SIZE;
1063 		pause_off_thresh = 1 * ENETC_MAC_MAXFRM_SIZE;
1064 	}
1065 
1066 	enetc_port_wr(hw, ENETC_PM0_PAUSE_QUANTA, init_quanta);
1067 	enetc_port_wr(hw, ENETC_PM1_PAUSE_QUANTA, init_quanta);
1068 	enetc_port_wr(hw, ENETC_PM0_PAUSE_THRESH, refresh_quanta);
1069 	enetc_port_wr(hw, ENETC_PM1_PAUSE_THRESH, refresh_quanta);
1070 	enetc_port_wr(hw, ENETC_PPAUONTR, pause_on_thresh);
1071 	enetc_port_wr(hw, ENETC_PPAUOFFTR, pause_off_thresh);
1072 
1073 	cmd_cfg = enetc_port_rd(hw, ENETC_PM0_CMD_CFG);
1074 
1075 	if (rx_pause)
1076 		cmd_cfg &= ~ENETC_PM0_PAUSE_IGN;
1077 	else
1078 		cmd_cfg |= ENETC_PM0_PAUSE_IGN;
1079 
1080 	enetc_port_wr(hw, ENETC_PM0_CMD_CFG, cmd_cfg);
1081 	enetc_port_wr(hw, ENETC_PM1_CMD_CFG, cmd_cfg);
1082 
1083 	enetc_mac_enable(hw, true);
1084 }
1085 
enetc_pl_mac_link_down(struct phylink_config * config,unsigned int mode,phy_interface_t interface)1086 static void enetc_pl_mac_link_down(struct phylink_config *config,
1087 				   unsigned int mode,
1088 				   phy_interface_t interface)
1089 {
1090 	struct enetc_pf *pf = phylink_to_enetc_pf(config);
1091 
1092 	enetc_mac_enable(&pf->si->hw, false);
1093 }
1094 
1095 static const struct phylink_mac_ops enetc_mac_phylink_ops = {
1096 	.validate = enetc_pl_mac_validate,
1097 	.mac_config = enetc_pl_mac_config,
1098 	.mac_link_up = enetc_pl_mac_link_up,
1099 	.mac_link_down = enetc_pl_mac_link_down,
1100 };
1101 
enetc_phylink_create(struct enetc_ndev_priv * priv,struct device_node * node)1102 static int enetc_phylink_create(struct enetc_ndev_priv *priv,
1103 				struct device_node *node)
1104 {
1105 	struct enetc_pf *pf = enetc_si_priv(priv->si);
1106 	struct phylink *phylink;
1107 	int err;
1108 
1109 	pf->phylink_config.dev = &priv->ndev->dev;
1110 	pf->phylink_config.type = PHYLINK_NETDEV;
1111 
1112 	phylink = phylink_create(&pf->phylink_config, of_fwnode_handle(node),
1113 				 pf->if_mode, &enetc_mac_phylink_ops);
1114 	if (IS_ERR(phylink)) {
1115 		err = PTR_ERR(phylink);
1116 		return err;
1117 	}
1118 
1119 	priv->phylink = phylink;
1120 
1121 	return 0;
1122 }
1123 
enetc_phylink_destroy(struct enetc_ndev_priv * priv)1124 static void enetc_phylink_destroy(struct enetc_ndev_priv *priv)
1125 {
1126 	if (priv->phylink)
1127 		phylink_destroy(priv->phylink);
1128 }
1129 
1130 /* Initialize the entire shared memory for the flow steering entries
1131  * of this port (PF + VFs)
1132  */
enetc_init_port_rfs_memory(struct enetc_si * si)1133 static int enetc_init_port_rfs_memory(struct enetc_si *si)
1134 {
1135 	struct enetc_cmd_rfse rfse = {0};
1136 	struct enetc_hw *hw = &si->hw;
1137 	int num_rfs, i, err = 0;
1138 	u32 val;
1139 
1140 	val = enetc_port_rd(hw, ENETC_PRFSCAPR);
1141 	num_rfs = ENETC_PRFSCAPR_GET_NUM_RFS(val);
1142 
1143 	for (i = 0; i < num_rfs; i++) {
1144 		err = enetc_set_fs_entry(si, &rfse, i);
1145 		if (err)
1146 			break;
1147 	}
1148 
1149 	return err;
1150 }
1151 
enetc_init_port_rss_memory(struct enetc_si * si)1152 static int enetc_init_port_rss_memory(struct enetc_si *si)
1153 {
1154 	struct enetc_hw *hw = &si->hw;
1155 	int num_rss, err;
1156 	int *rss_table;
1157 	u32 val;
1158 
1159 	val = enetc_port_rd(hw, ENETC_PRSSCAPR);
1160 	num_rss = ENETC_PRSSCAPR_GET_NUM_RSS(val);
1161 	if (!num_rss)
1162 		return 0;
1163 
1164 	rss_table = kcalloc(num_rss, sizeof(*rss_table), GFP_KERNEL);
1165 	if (!rss_table)
1166 		return -ENOMEM;
1167 
1168 	err = enetc_set_rss_table(si, rss_table, num_rss);
1169 
1170 	kfree(rss_table);
1171 
1172 	return err;
1173 }
1174 
enetc_pf_register_with_ierb(struct pci_dev * pdev)1175 static int enetc_pf_register_with_ierb(struct pci_dev *pdev)
1176 {
1177 	struct device_node *node = pdev->dev.of_node;
1178 	struct platform_device *ierb_pdev;
1179 	struct device_node *ierb_node;
1180 
1181 	/* Don't register with the IERB if the PF itself is disabled */
1182 	if (!node || !of_device_is_available(node))
1183 		return 0;
1184 
1185 	ierb_node = of_find_compatible_node(NULL, NULL,
1186 					    "fsl,ls1028a-enetc-ierb");
1187 	if (!ierb_node || !of_device_is_available(ierb_node))
1188 		return -ENODEV;
1189 
1190 	ierb_pdev = of_find_device_by_node(ierb_node);
1191 	of_node_put(ierb_node);
1192 
1193 	if (!ierb_pdev)
1194 		return -EPROBE_DEFER;
1195 
1196 	return enetc_ierb_register_pf(ierb_pdev, pdev);
1197 }
1198 
enetc_pf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1199 static int enetc_pf_probe(struct pci_dev *pdev,
1200 			  const struct pci_device_id *ent)
1201 {
1202 	struct device_node *node = pdev->dev.of_node;
1203 	struct enetc_ndev_priv *priv;
1204 	struct net_device *ndev;
1205 	struct enetc_si *si;
1206 	struct enetc_pf *pf;
1207 	int err;
1208 
1209 	err = enetc_pf_register_with_ierb(pdev);
1210 	if (err == -EPROBE_DEFER)
1211 		return err;
1212 	if (err)
1213 		dev_warn(&pdev->dev,
1214 			 "Could not register with IERB driver: %pe, please update the device tree\n",
1215 			 ERR_PTR(err));
1216 
1217 	err = enetc_pci_probe(pdev, KBUILD_MODNAME, sizeof(*pf));
1218 	if (err) {
1219 		dev_err(&pdev->dev, "PCI probing failed\n");
1220 		return err;
1221 	}
1222 
1223 	si = pci_get_drvdata(pdev);
1224 	if (!si->hw.port || !si->hw.global) {
1225 		err = -ENODEV;
1226 		dev_err(&pdev->dev, "could not map PF space, probing a VF?\n");
1227 		goto err_map_pf_space;
1228 	}
1229 
1230 	err = enetc_setup_cbdr(&pdev->dev, &si->hw, ENETC_CBDR_DEFAULT_SIZE,
1231 			       &si->cbd_ring);
1232 	if (err)
1233 		goto err_setup_cbdr;
1234 
1235 	err = enetc_init_port_rfs_memory(si);
1236 	if (err) {
1237 		dev_err(&pdev->dev, "Failed to initialize RFS memory\n");
1238 		goto err_init_port_rfs;
1239 	}
1240 
1241 	err = enetc_init_port_rss_memory(si);
1242 	if (err) {
1243 		dev_err(&pdev->dev, "Failed to initialize RSS memory\n");
1244 		goto err_init_port_rss;
1245 	}
1246 
1247 	if (node && !of_device_is_available(node)) {
1248 		dev_info(&pdev->dev, "device is disabled, skipping\n");
1249 		err = -ENODEV;
1250 		goto err_device_disabled;
1251 	}
1252 
1253 	pf = enetc_si_priv(si);
1254 	pf->si = si;
1255 	pf->total_vfs = pci_sriov_get_totalvfs(pdev);
1256 
1257 	err = enetc_setup_mac_addresses(node, pf);
1258 	if (err)
1259 		goto err_setup_mac_addresses;
1260 
1261 	enetc_configure_port(pf);
1262 
1263 	enetc_get_si_caps(si);
1264 
1265 	ndev = alloc_etherdev_mq(sizeof(*priv), ENETC_MAX_NUM_TXQS);
1266 	if (!ndev) {
1267 		err = -ENOMEM;
1268 		dev_err(&pdev->dev, "netdev creation failed\n");
1269 		goto err_alloc_netdev;
1270 	}
1271 
1272 	enetc_pf_netdev_setup(si, ndev, &enetc_ndev_ops);
1273 
1274 	priv = netdev_priv(ndev);
1275 
1276 	enetc_init_si_rings_params(priv);
1277 
1278 	err = enetc_alloc_si_resources(priv);
1279 	if (err) {
1280 		dev_err(&pdev->dev, "SI resource alloc failed\n");
1281 		goto err_alloc_si_res;
1282 	}
1283 
1284 	err = enetc_configure_si(priv);
1285 	if (err) {
1286 		dev_err(&pdev->dev, "Failed to configure SI\n");
1287 		goto err_config_si;
1288 	}
1289 
1290 	err = enetc_alloc_msix(priv);
1291 	if (err) {
1292 		dev_err(&pdev->dev, "MSIX alloc failed\n");
1293 		goto err_alloc_msix;
1294 	}
1295 
1296 	if (!of_get_phy_mode(node, &pf->if_mode)) {
1297 		err = enetc_mdiobus_create(pf, node);
1298 		if (err)
1299 			goto err_mdiobus_create;
1300 
1301 		err = enetc_phylink_create(priv, node);
1302 		if (err)
1303 			goto err_phylink_create;
1304 	}
1305 
1306 	err = register_netdev(ndev);
1307 	if (err)
1308 		goto err_reg_netdev;
1309 
1310 	return 0;
1311 
1312 err_reg_netdev:
1313 	enetc_phylink_destroy(priv);
1314 err_phylink_create:
1315 	enetc_mdiobus_destroy(pf);
1316 err_mdiobus_create:
1317 	enetc_free_msix(priv);
1318 err_config_si:
1319 err_alloc_msix:
1320 	enetc_free_si_resources(priv);
1321 err_alloc_si_res:
1322 	si->ndev = NULL;
1323 	free_netdev(ndev);
1324 err_alloc_netdev:
1325 err_init_port_rss:
1326 err_init_port_rfs:
1327 err_device_disabled:
1328 err_setup_mac_addresses:
1329 	enetc_teardown_cbdr(&si->cbd_ring);
1330 err_setup_cbdr:
1331 err_map_pf_space:
1332 	enetc_pci_remove(pdev);
1333 
1334 	return err;
1335 }
1336 
enetc_pf_remove(struct pci_dev * pdev)1337 static void enetc_pf_remove(struct pci_dev *pdev)
1338 {
1339 	struct enetc_si *si = pci_get_drvdata(pdev);
1340 	struct enetc_pf *pf = enetc_si_priv(si);
1341 	struct enetc_ndev_priv *priv;
1342 
1343 	priv = netdev_priv(si->ndev);
1344 
1345 	if (pf->num_vfs)
1346 		enetc_sriov_configure(pdev, 0);
1347 
1348 	unregister_netdev(si->ndev);
1349 
1350 	enetc_phylink_destroy(priv);
1351 	enetc_mdiobus_destroy(pf);
1352 
1353 	enetc_free_msix(priv);
1354 
1355 	enetc_free_si_resources(priv);
1356 	enetc_teardown_cbdr(&si->cbd_ring);
1357 
1358 	free_netdev(si->ndev);
1359 
1360 	enetc_pci_remove(pdev);
1361 }
1362 
1363 static const struct pci_device_id enetc_pf_id_table[] = {
1364 	{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PF) },
1365 	{ 0, } /* End of table. */
1366 };
1367 MODULE_DEVICE_TABLE(pci, enetc_pf_id_table);
1368 
1369 static struct pci_driver enetc_pf_driver = {
1370 	.name = KBUILD_MODNAME,
1371 	.id_table = enetc_pf_id_table,
1372 	.probe = enetc_pf_probe,
1373 	.remove = enetc_pf_remove,
1374 #ifdef CONFIG_PCI_IOV
1375 	.sriov_configure = enetc_sriov_configure,
1376 #endif
1377 };
1378 module_pci_driver(enetc_pf_driver);
1379 
1380 MODULE_DESCRIPTION(ENETC_DRV_NAME_STR);
1381 MODULE_LICENSE("Dual BSD/GPL");
1382