1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Broadcom BCM7xxx System Port Ethernet MAC driver
4  *
5  * Copyright (C) 2014 Broadcom Corporation
6  */
7 
8 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
9 
10 #include <linux/init.h>
11 #include <linux/interrupt.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/netdevice.h>
15 #include <linux/dsa/brcm.h>
16 #include <linux/etherdevice.h>
17 #include <linux/platform_device.h>
18 #include <linux/of.h>
19 #include <linux/of_net.h>
20 #include <linux/of_mdio.h>
21 #include <linux/phy.h>
22 #include <linux/phy_fixed.h>
23 #include <net/dsa.h>
24 #include <linux/clk.h>
25 #include <net/ip.h>
26 #include <net/ipv6.h>
27 
28 #include "bcmsysport.h"
29 
30 /* I/O accessors register helpers */
31 #define BCM_SYSPORT_IO_MACRO(name, offset) \
32 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)	\
33 {									\
34 	u32 reg = readl_relaxed(priv->base + offset + off);		\
35 	return reg;							\
36 }									\
37 static inline void name##_writel(struct bcm_sysport_priv *priv,		\
38 				  u32 val, u32 off)			\
39 {									\
40 	writel_relaxed(val, priv->base + offset + off);			\
41 }									\
42 
43 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
44 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
45 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
46 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
47 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
48 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
49 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
50 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
51 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
52 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
53 
54 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
55  * same layout, except it has been moved by 4 bytes up, *sigh*
56  */
57 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
58 {
59 	if (priv->is_lite && off >= RDMA_STATUS)
60 		off += 4;
61 	return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
62 }
63 
64 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
65 {
66 	if (priv->is_lite && off >= RDMA_STATUS)
67 		off += 4;
68 	writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
69 }
70 
71 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
72 {
73 	if (!priv->is_lite) {
74 		return BIT(bit);
75 	} else {
76 		if (bit >= ACB_ALGO)
77 			return BIT(bit + 1);
78 		else
79 			return BIT(bit);
80 	}
81 }
82 
83 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
84  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
85   */
86 #define BCM_SYSPORT_INTR_L2(which)	\
87 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
88 						u32 mask)		\
89 {									\
90 	priv->irq##which##_mask &= ~(mask);				\
91 	intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);	\
92 }									\
93 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
94 						u32 mask)		\
95 {									\
96 	intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);	\
97 	priv->irq##which##_mask |= (mask);				\
98 }									\
99 
100 BCM_SYSPORT_INTR_L2(0)
101 BCM_SYSPORT_INTR_L2(1)
102 
103 /* Register accesses to GISB/RBUS registers are expensive (few hundred
104  * nanoseconds), so keep the check for 64-bits explicit here to save
105  * one register write per-packet on 32-bits platforms.
106  */
107 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
108 				     void __iomem *d,
109 				     dma_addr_t addr)
110 {
111 #ifdef CONFIG_PHYS_ADDR_T_64BIT
112 	writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
113 		     d + DESC_ADDR_HI_STATUS_LEN);
114 #endif
115 	writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
116 }
117 
118 /* Ethtool operations */
119 static void bcm_sysport_set_rx_csum(struct net_device *dev,
120 				    netdev_features_t wanted)
121 {
122 	struct bcm_sysport_priv *priv = netdev_priv(dev);
123 	u32 reg;
124 
125 	priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
126 	reg = rxchk_readl(priv, RXCHK_CONTROL);
127 	/* Clear L2 header checks, which would prevent BPDUs
128 	 * from being received.
129 	 */
130 	reg &= ~RXCHK_L2_HDR_DIS;
131 	if (priv->rx_chk_en)
132 		reg |= RXCHK_EN;
133 	else
134 		reg &= ~RXCHK_EN;
135 
136 	/* If UniMAC forwards CRC, we need to skip over it to get
137 	 * a valid CHK bit to be set in the per-packet status word
138 	 */
139 	if (priv->rx_chk_en && priv->crc_fwd)
140 		reg |= RXCHK_SKIP_FCS;
141 	else
142 		reg &= ~RXCHK_SKIP_FCS;
143 
144 	/* If Broadcom tags are enabled (e.g: using a switch), make
145 	 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
146 	 * tag after the Ethernet MAC Source Address.
147 	 */
148 	if (netdev_uses_dsa(dev))
149 		reg |= RXCHK_BRCM_TAG_EN;
150 	else
151 		reg &= ~RXCHK_BRCM_TAG_EN;
152 
153 	rxchk_writel(priv, reg, RXCHK_CONTROL);
154 }
155 
156 static void bcm_sysport_set_tx_csum(struct net_device *dev,
157 				    netdev_features_t wanted)
158 {
159 	struct bcm_sysport_priv *priv = netdev_priv(dev);
160 	u32 reg;
161 
162 	/* Hardware transmit checksum requires us to enable the Transmit status
163 	 * block prepended to the packet contents
164 	 */
165 	priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
166 				    NETIF_F_HW_VLAN_CTAG_TX));
167 	reg = tdma_readl(priv, TDMA_CONTROL);
168 	if (priv->tsb_en)
169 		reg |= tdma_control_bit(priv, TSB_EN);
170 	else
171 		reg &= ~tdma_control_bit(priv, TSB_EN);
172 	/* Indicating that software inserts Broadcom tags is needed for the TX
173 	 * checksum to be computed correctly when using VLAN HW acceleration,
174 	 * else it has no effect, so it can always be turned on.
175 	 */
176 	if (netdev_uses_dsa(dev))
177 		reg |= tdma_control_bit(priv, SW_BRCM_TAG);
178 	else
179 		reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
180 	tdma_writel(priv, reg, TDMA_CONTROL);
181 
182 	/* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
183 	if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
184 		tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
185 }
186 
187 static int bcm_sysport_set_features(struct net_device *dev,
188 				    netdev_features_t features)
189 {
190 	struct bcm_sysport_priv *priv = netdev_priv(dev);
191 	int ret;
192 
193 	ret = clk_prepare_enable(priv->clk);
194 	if (ret)
195 		return ret;
196 
197 	/* Read CRC forward */
198 	if (!priv->is_lite)
199 		priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
200 	else
201 		priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
202 				  GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
203 
204 	bcm_sysport_set_rx_csum(dev, features);
205 	bcm_sysport_set_tx_csum(dev, features);
206 
207 	clk_disable_unprepare(priv->clk);
208 
209 	return 0;
210 }
211 
212 /* Hardware counters must be kept in sync because the order/offset
213  * is important here (order in structure declaration = order in hardware)
214  */
215 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
216 	/* general stats */
217 	STAT_NETDEV64(rx_packets),
218 	STAT_NETDEV64(tx_packets),
219 	STAT_NETDEV64(rx_bytes),
220 	STAT_NETDEV64(tx_bytes),
221 	STAT_NETDEV(rx_errors),
222 	STAT_NETDEV(tx_errors),
223 	STAT_NETDEV(rx_dropped),
224 	STAT_NETDEV(tx_dropped),
225 	STAT_NETDEV(multicast),
226 	/* UniMAC RSV counters */
227 	STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
228 	STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
229 	STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
230 	STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
231 	STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
232 	STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
233 	STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
234 	STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
235 	STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
236 	STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
237 	STAT_MIB_RX("rx_pkts", mib.rx.pkt),
238 	STAT_MIB_RX("rx_bytes", mib.rx.bytes),
239 	STAT_MIB_RX("rx_multicast", mib.rx.mca),
240 	STAT_MIB_RX("rx_broadcast", mib.rx.bca),
241 	STAT_MIB_RX("rx_fcs", mib.rx.fcs),
242 	STAT_MIB_RX("rx_control", mib.rx.cf),
243 	STAT_MIB_RX("rx_pause", mib.rx.pf),
244 	STAT_MIB_RX("rx_unknown", mib.rx.uo),
245 	STAT_MIB_RX("rx_align", mib.rx.aln),
246 	STAT_MIB_RX("rx_outrange", mib.rx.flr),
247 	STAT_MIB_RX("rx_code", mib.rx.cde),
248 	STAT_MIB_RX("rx_carrier", mib.rx.fcr),
249 	STAT_MIB_RX("rx_oversize", mib.rx.ovr),
250 	STAT_MIB_RX("rx_jabber", mib.rx.jbr),
251 	STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
252 	STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
253 	STAT_MIB_RX("rx_unicast", mib.rx.uc),
254 	STAT_MIB_RX("rx_ppp", mib.rx.ppp),
255 	STAT_MIB_RX("rx_crc", mib.rx.rcrc),
256 	/* UniMAC TSV counters */
257 	STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
258 	STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
259 	STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
260 	STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
261 	STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
262 	STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
263 	STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
264 	STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
265 	STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
266 	STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
267 	STAT_MIB_TX("tx_pkts", mib.tx.pkts),
268 	STAT_MIB_TX("tx_multicast", mib.tx.mca),
269 	STAT_MIB_TX("tx_broadcast", mib.tx.bca),
270 	STAT_MIB_TX("tx_pause", mib.tx.pf),
271 	STAT_MIB_TX("tx_control", mib.tx.cf),
272 	STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
273 	STAT_MIB_TX("tx_oversize", mib.tx.ovr),
274 	STAT_MIB_TX("tx_defer", mib.tx.drf),
275 	STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
276 	STAT_MIB_TX("tx_single_col", mib.tx.scl),
277 	STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
278 	STAT_MIB_TX("tx_late_col", mib.tx.lcl),
279 	STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
280 	STAT_MIB_TX("tx_frags", mib.tx.frg),
281 	STAT_MIB_TX("tx_total_col", mib.tx.ncl),
282 	STAT_MIB_TX("tx_jabber", mib.tx.jbr),
283 	STAT_MIB_TX("tx_bytes", mib.tx.bytes),
284 	STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
285 	STAT_MIB_TX("tx_unicast", mib.tx.uc),
286 	/* UniMAC RUNT counters */
287 	STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
288 	STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
289 	STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
290 	STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
291 	/* RXCHK misc statistics */
292 	STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
293 	STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
294 		   RXCHK_OTHER_DISC_CNTR),
295 	/* RBUF misc statistics */
296 	STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
297 	STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
298 	/* RDMA misc statistics */
299 	STAT_RDMA("rdma_ovflow_cnt", mib.rdma_ovflow_cnt, RDMA_OVFL_DISC_CNTR),
300 	STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
301 	STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
302 	STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
303 	STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
304 	STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
305 	/* Per TX-queue statistics are dynamically appended */
306 };
307 
308 #define BCM_SYSPORT_STATS_LEN	ARRAY_SIZE(bcm_sysport_gstrings_stats)
309 
310 static void bcm_sysport_get_drvinfo(struct net_device *dev,
311 				    struct ethtool_drvinfo *info)
312 {
313 	strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
314 	strscpy(info->bus_info, "platform", sizeof(info->bus_info));
315 }
316 
317 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
318 {
319 	struct bcm_sysport_priv *priv = netdev_priv(dev);
320 
321 	return priv->msg_enable;
322 }
323 
324 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
325 {
326 	struct bcm_sysport_priv *priv = netdev_priv(dev);
327 
328 	priv->msg_enable = enable;
329 }
330 
331 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
332 {
333 	switch (type) {
334 	case BCM_SYSPORT_STAT_NETDEV:
335 	case BCM_SYSPORT_STAT_NETDEV64:
336 	case BCM_SYSPORT_STAT_RXCHK:
337 	case BCM_SYSPORT_STAT_RBUF:
338 	case BCM_SYSPORT_STAT_RDMA:
339 	case BCM_SYSPORT_STAT_SOFT:
340 		return true;
341 	default:
342 		return false;
343 	}
344 }
345 
346 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
347 {
348 	struct bcm_sysport_priv *priv = netdev_priv(dev);
349 	const struct bcm_sysport_stats *s;
350 	unsigned int i, j;
351 
352 	switch (string_set) {
353 	case ETH_SS_STATS:
354 		for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
355 			s = &bcm_sysport_gstrings_stats[i];
356 			if (priv->is_lite &&
357 			    !bcm_sysport_lite_stat_valid(s->type))
358 				continue;
359 			j++;
360 		}
361 		/* Include per-queue statistics */
362 		return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
363 	default:
364 		return -EOPNOTSUPP;
365 	}
366 }
367 
368 static void bcm_sysport_get_strings(struct net_device *dev,
369 				    u32 stringset, u8 *data)
370 {
371 	struct bcm_sysport_priv *priv = netdev_priv(dev);
372 	const struct bcm_sysport_stats *s;
373 	char buf[128];
374 	int i, j;
375 
376 	switch (stringset) {
377 	case ETH_SS_STATS:
378 		for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
379 			s = &bcm_sysport_gstrings_stats[i];
380 			if (priv->is_lite &&
381 			    !bcm_sysport_lite_stat_valid(s->type))
382 				continue;
383 
384 			memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
385 			       ETH_GSTRING_LEN);
386 			j++;
387 		}
388 
389 		for (i = 0; i < dev->num_tx_queues; i++) {
390 			snprintf(buf, sizeof(buf), "txq%d_packets", i);
391 			memcpy(data + j * ETH_GSTRING_LEN, buf,
392 			       ETH_GSTRING_LEN);
393 			j++;
394 
395 			snprintf(buf, sizeof(buf), "txq%d_bytes", i);
396 			memcpy(data + j * ETH_GSTRING_LEN, buf,
397 			       ETH_GSTRING_LEN);
398 			j++;
399 		}
400 		break;
401 	default:
402 		break;
403 	}
404 }
405 
406 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
407 {
408 	int i, j = 0;
409 
410 	for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
411 		const struct bcm_sysport_stats *s;
412 		u8 offset = 0;
413 		u32 val = 0;
414 		char *p;
415 
416 		s = &bcm_sysport_gstrings_stats[i];
417 		switch (s->type) {
418 		case BCM_SYSPORT_STAT_NETDEV:
419 		case BCM_SYSPORT_STAT_NETDEV64:
420 		case BCM_SYSPORT_STAT_SOFT:
421 			continue;
422 		case BCM_SYSPORT_STAT_MIB_RX:
423 		case BCM_SYSPORT_STAT_MIB_TX:
424 		case BCM_SYSPORT_STAT_RUNT:
425 			if (priv->is_lite)
426 				continue;
427 
428 			if (s->type != BCM_SYSPORT_STAT_MIB_RX)
429 				offset = UMAC_MIB_STAT_OFFSET;
430 			val = umac_readl(priv, UMAC_MIB_START + j + offset);
431 			break;
432 		case BCM_SYSPORT_STAT_RXCHK:
433 			val = rxchk_readl(priv, s->reg_offset);
434 			if (val == ~0)
435 				rxchk_writel(priv, 0, s->reg_offset);
436 			break;
437 		case BCM_SYSPORT_STAT_RBUF:
438 			val = rbuf_readl(priv, s->reg_offset);
439 			if (val == ~0)
440 				rbuf_writel(priv, 0, s->reg_offset);
441 			break;
442 		case BCM_SYSPORT_STAT_RDMA:
443 			if (!priv->is_lite)
444 				continue;
445 
446 			val = rdma_readl(priv, s->reg_offset);
447 			if (val == ~0)
448 				rdma_writel(priv, 0, s->reg_offset);
449 			break;
450 		}
451 
452 		j += s->stat_sizeof;
453 		p = (char *)priv + s->stat_offset;
454 		*(u32 *)p = val;
455 	}
456 
457 	netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
458 }
459 
460 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
461 					u64 *tx_bytes, u64 *tx_packets)
462 {
463 	struct bcm_sysport_tx_ring *ring;
464 	u64 bytes = 0, packets = 0;
465 	unsigned int start;
466 	unsigned int q;
467 
468 	for (q = 0; q < priv->netdev->num_tx_queues; q++) {
469 		ring = &priv->tx_rings[q];
470 		do {
471 			start = u64_stats_fetch_begin(&priv->syncp);
472 			bytes = ring->bytes;
473 			packets = ring->packets;
474 		} while (u64_stats_fetch_retry(&priv->syncp, start));
475 
476 		*tx_bytes += bytes;
477 		*tx_packets += packets;
478 	}
479 }
480 
481 static void bcm_sysport_get_stats(struct net_device *dev,
482 				  struct ethtool_stats *stats, u64 *data)
483 {
484 	struct bcm_sysport_priv *priv = netdev_priv(dev);
485 	struct bcm_sysport_stats64 *stats64 = &priv->stats64;
486 	struct u64_stats_sync *syncp = &priv->syncp;
487 	struct bcm_sysport_tx_ring *ring;
488 	u64 tx_bytes = 0, tx_packets = 0;
489 	unsigned int start;
490 	int i, j;
491 
492 	if (netif_running(dev)) {
493 		bcm_sysport_update_mib_counters(priv);
494 		bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
495 		stats64->tx_bytes = tx_bytes;
496 		stats64->tx_packets = tx_packets;
497 	}
498 
499 	for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
500 		const struct bcm_sysport_stats *s;
501 		char *p;
502 
503 		s = &bcm_sysport_gstrings_stats[i];
504 		if (s->type == BCM_SYSPORT_STAT_NETDEV)
505 			p = (char *)&dev->stats;
506 		else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
507 			p = (char *)stats64;
508 		else
509 			p = (char *)priv;
510 
511 		if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
512 			continue;
513 		p += s->stat_offset;
514 
515 		if (s->stat_sizeof == sizeof(u64) &&
516 		    s->type == BCM_SYSPORT_STAT_NETDEV64) {
517 			do {
518 				start = u64_stats_fetch_begin(syncp);
519 				data[i] = *(u64 *)p;
520 			} while (u64_stats_fetch_retry(syncp, start));
521 		} else
522 			data[i] = *(u32 *)p;
523 		j++;
524 	}
525 
526 	/* For SYSTEMPORT Lite since we have holes in our statistics, j would
527 	 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
528 	 * needs to point to how many total statistics we have minus the
529 	 * number of per TX queue statistics
530 	 */
531 	j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
532 	    dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
533 
534 	for (i = 0; i < dev->num_tx_queues; i++) {
535 		ring = &priv->tx_rings[i];
536 		data[j] = ring->packets;
537 		j++;
538 		data[j] = ring->bytes;
539 		j++;
540 	}
541 }
542 
543 static void bcm_sysport_get_wol(struct net_device *dev,
544 				struct ethtool_wolinfo *wol)
545 {
546 	struct bcm_sysport_priv *priv = netdev_priv(dev);
547 
548 	wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
549 	wol->wolopts = priv->wolopts;
550 
551 	if (!(priv->wolopts & WAKE_MAGICSECURE))
552 		return;
553 
554 	memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
555 }
556 
557 static int bcm_sysport_set_wol(struct net_device *dev,
558 			       struct ethtool_wolinfo *wol)
559 {
560 	struct bcm_sysport_priv *priv = netdev_priv(dev);
561 	struct device *kdev = &priv->pdev->dev;
562 	u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
563 
564 	if (!device_can_wakeup(kdev))
565 		return -ENOTSUPP;
566 
567 	if (wol->wolopts & ~supported)
568 		return -EINVAL;
569 
570 	if (wol->wolopts & WAKE_MAGICSECURE)
571 		memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
572 
573 	/* Flag the device and relevant IRQ as wakeup capable */
574 	if (wol->wolopts) {
575 		device_set_wakeup_enable(kdev, 1);
576 		if (priv->wol_irq_disabled)
577 			enable_irq_wake(priv->wol_irq);
578 		priv->wol_irq_disabled = 0;
579 	} else {
580 		device_set_wakeup_enable(kdev, 0);
581 		/* Avoid unbalanced disable_irq_wake calls */
582 		if (!priv->wol_irq_disabled)
583 			disable_irq_wake(priv->wol_irq);
584 		priv->wol_irq_disabled = 1;
585 	}
586 
587 	priv->wolopts = wol->wolopts;
588 
589 	return 0;
590 }
591 
592 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
593 					u32 usecs, u32 pkts)
594 {
595 	u32 reg;
596 
597 	reg = rdma_readl(priv, RDMA_MBDONE_INTR);
598 	reg &= ~(RDMA_INTR_THRESH_MASK |
599 		 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
600 	reg |= pkts;
601 	reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
602 	rdma_writel(priv, reg, RDMA_MBDONE_INTR);
603 }
604 
605 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
606 					struct ethtool_coalesce *ec)
607 {
608 	struct bcm_sysport_priv *priv = ring->priv;
609 	u32 reg;
610 
611 	reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
612 	reg &= ~(RING_INTR_THRESH_MASK |
613 		 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
614 	reg |= ec->tx_max_coalesced_frames;
615 	reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
616 			    RING_TIMEOUT_SHIFT;
617 	tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
618 }
619 
620 static int bcm_sysport_get_coalesce(struct net_device *dev,
621 				    struct ethtool_coalesce *ec,
622 				    struct kernel_ethtool_coalesce *kernel_coal,
623 				    struct netlink_ext_ack *extack)
624 {
625 	struct bcm_sysport_priv *priv = netdev_priv(dev);
626 	u32 reg;
627 
628 	reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
629 
630 	ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
631 	ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
632 
633 	reg = rdma_readl(priv, RDMA_MBDONE_INTR);
634 
635 	ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
636 	ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
637 	ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
638 
639 	return 0;
640 }
641 
642 static int bcm_sysport_set_coalesce(struct net_device *dev,
643 				    struct ethtool_coalesce *ec,
644 				    struct kernel_ethtool_coalesce *kernel_coal,
645 				    struct netlink_ext_ack *extack)
646 {
647 	struct bcm_sysport_priv *priv = netdev_priv(dev);
648 	struct dim_cq_moder moder;
649 	u32 usecs, pkts;
650 	unsigned int i;
651 
652 	/* Base system clock is 125Mhz, DMA timeout is this reference clock
653 	 * divided by 1024, which yield roughly 8.192 us, our maximum value has
654 	 * to fit in the RING_TIMEOUT_MASK (16 bits).
655 	 */
656 	if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
657 	    ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
658 	    ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
659 	    ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
660 		return -EINVAL;
661 
662 	if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
663 	    (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
664 		return -EINVAL;
665 
666 	for (i = 0; i < dev->num_tx_queues; i++)
667 		bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
668 
669 	priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
670 	priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
671 	usecs = priv->rx_coalesce_usecs;
672 	pkts = priv->rx_max_coalesced_frames;
673 
674 	if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
675 		moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
676 		usecs = moder.usec;
677 		pkts = moder.pkts;
678 	}
679 
680 	priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
681 
682 	/* Apply desired coalescing parameters */
683 	bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
684 
685 	return 0;
686 }
687 
688 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
689 {
690 	dev_consume_skb_any(cb->skb);
691 	cb->skb = NULL;
692 	dma_unmap_addr_set(cb, dma_addr, 0);
693 }
694 
695 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
696 					     struct bcm_sysport_cb *cb)
697 {
698 	struct device *kdev = &priv->pdev->dev;
699 	struct net_device *ndev = priv->netdev;
700 	struct sk_buff *skb, *rx_skb;
701 	dma_addr_t mapping;
702 
703 	/* Allocate a new SKB for a new packet */
704 	skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
705 				 GFP_ATOMIC | __GFP_NOWARN);
706 	if (!skb) {
707 		priv->mib.alloc_rx_buff_failed++;
708 		netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
709 		return NULL;
710 	}
711 
712 	mapping = dma_map_single(kdev, skb->data,
713 				 RX_BUF_LENGTH, DMA_FROM_DEVICE);
714 	if (dma_mapping_error(kdev, mapping)) {
715 		priv->mib.rx_dma_failed++;
716 		dev_kfree_skb_any(skb);
717 		netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
718 		return NULL;
719 	}
720 
721 	/* Grab the current SKB on the ring */
722 	rx_skb = cb->skb;
723 	if (likely(rx_skb))
724 		dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
725 				 RX_BUF_LENGTH, DMA_FROM_DEVICE);
726 
727 	/* Put the new SKB on the ring */
728 	cb->skb = skb;
729 	dma_unmap_addr_set(cb, dma_addr, mapping);
730 	dma_desc_set_addr(priv, cb->bd_addr, mapping);
731 
732 	netif_dbg(priv, rx_status, ndev, "RX refill\n");
733 
734 	/* Return the current SKB to the caller */
735 	return rx_skb;
736 }
737 
738 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
739 {
740 	struct bcm_sysport_cb *cb;
741 	struct sk_buff *skb;
742 	unsigned int i;
743 
744 	for (i = 0; i < priv->num_rx_bds; i++) {
745 		cb = &priv->rx_cbs[i];
746 		skb = bcm_sysport_rx_refill(priv, cb);
747 		dev_kfree_skb(skb);
748 		if (!cb->skb)
749 			return -ENOMEM;
750 	}
751 
752 	return 0;
753 }
754 
755 /* Poll the hardware for up to budget packets to process */
756 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
757 					unsigned int budget)
758 {
759 	struct bcm_sysport_stats64 *stats64 = &priv->stats64;
760 	struct net_device *ndev = priv->netdev;
761 	unsigned int processed = 0, to_process;
762 	unsigned int processed_bytes = 0;
763 	struct bcm_sysport_cb *cb;
764 	struct sk_buff *skb;
765 	unsigned int p_index;
766 	u16 len, status;
767 	struct bcm_rsb *rsb;
768 
769 	/* Clear status before servicing to reduce spurious interrupts */
770 	intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
771 
772 	/* Determine how much we should process since last call, SYSTEMPORT Lite
773 	 * groups the producer and consumer indexes into the same 32-bit
774 	 * which we access using RDMA_CONS_INDEX
775 	 */
776 	if (!priv->is_lite)
777 		p_index = rdma_readl(priv, RDMA_PROD_INDEX);
778 	else
779 		p_index = rdma_readl(priv, RDMA_CONS_INDEX);
780 	p_index &= RDMA_PROD_INDEX_MASK;
781 
782 	to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
783 
784 	netif_dbg(priv, rx_status, ndev,
785 		  "p_index=%d rx_c_index=%d to_process=%d\n",
786 		  p_index, priv->rx_c_index, to_process);
787 
788 	while ((processed < to_process) && (processed < budget)) {
789 		cb = &priv->rx_cbs[priv->rx_read_ptr];
790 		skb = bcm_sysport_rx_refill(priv, cb);
791 
792 
793 		/* We do not have a backing SKB, so we do not a corresponding
794 		 * DMA mapping for this incoming packet since
795 		 * bcm_sysport_rx_refill always either has both skb and mapping
796 		 * or none.
797 		 */
798 		if (unlikely(!skb)) {
799 			netif_err(priv, rx_err, ndev, "out of memory!\n");
800 			ndev->stats.rx_dropped++;
801 			ndev->stats.rx_errors++;
802 			goto next;
803 		}
804 
805 		/* Extract the Receive Status Block prepended */
806 		rsb = (struct bcm_rsb *)skb->data;
807 		len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
808 		status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
809 			  DESC_STATUS_MASK;
810 
811 		netif_dbg(priv, rx_status, ndev,
812 			  "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
813 			  p_index, priv->rx_c_index, priv->rx_read_ptr,
814 			  len, status);
815 
816 		if (unlikely(len > RX_BUF_LENGTH)) {
817 			netif_err(priv, rx_status, ndev, "oversized packet\n");
818 			ndev->stats.rx_length_errors++;
819 			ndev->stats.rx_errors++;
820 			dev_kfree_skb_any(skb);
821 			goto next;
822 		}
823 
824 		if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
825 			netif_err(priv, rx_status, ndev, "fragmented packet!\n");
826 			ndev->stats.rx_dropped++;
827 			ndev->stats.rx_errors++;
828 			dev_kfree_skb_any(skb);
829 			goto next;
830 		}
831 
832 		if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
833 			netif_err(priv, rx_err, ndev, "error packet\n");
834 			if (status & RX_STATUS_OVFLOW)
835 				ndev->stats.rx_over_errors++;
836 			ndev->stats.rx_dropped++;
837 			ndev->stats.rx_errors++;
838 			dev_kfree_skb_any(skb);
839 			goto next;
840 		}
841 
842 		skb_put(skb, len);
843 
844 		/* Hardware validated our checksum */
845 		if (likely(status & DESC_L4_CSUM))
846 			skb->ip_summed = CHECKSUM_UNNECESSARY;
847 
848 		/* Hardware pre-pends packets with 2bytes before Ethernet
849 		 * header plus we have the Receive Status Block, strip off all
850 		 * of this from the SKB.
851 		 */
852 		skb_pull(skb, sizeof(*rsb) + 2);
853 		len -= (sizeof(*rsb) + 2);
854 		processed_bytes += len;
855 
856 		/* UniMAC may forward CRC */
857 		if (priv->crc_fwd) {
858 			skb_trim(skb, len - ETH_FCS_LEN);
859 			len -= ETH_FCS_LEN;
860 		}
861 
862 		skb->protocol = eth_type_trans(skb, ndev);
863 		ndev->stats.rx_packets++;
864 		ndev->stats.rx_bytes += len;
865 		u64_stats_update_begin(&priv->syncp);
866 		stats64->rx_packets++;
867 		stats64->rx_bytes += len;
868 		u64_stats_update_end(&priv->syncp);
869 
870 		napi_gro_receive(&priv->napi, skb);
871 next:
872 		processed++;
873 		priv->rx_read_ptr++;
874 
875 		if (priv->rx_read_ptr == priv->num_rx_bds)
876 			priv->rx_read_ptr = 0;
877 	}
878 
879 	priv->dim.packets = processed;
880 	priv->dim.bytes = processed_bytes;
881 
882 	return processed;
883 }
884 
885 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
886 				       struct bcm_sysport_cb *cb,
887 				       unsigned int *bytes_compl,
888 				       unsigned int *pkts_compl)
889 {
890 	struct bcm_sysport_priv *priv = ring->priv;
891 	struct device *kdev = &priv->pdev->dev;
892 
893 	if (cb->skb) {
894 		*bytes_compl += cb->skb->len;
895 		dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
896 				 dma_unmap_len(cb, dma_len),
897 				 DMA_TO_DEVICE);
898 		(*pkts_compl)++;
899 		bcm_sysport_free_cb(cb);
900 	/* SKB fragment */
901 	} else if (dma_unmap_addr(cb, dma_addr)) {
902 		*bytes_compl += dma_unmap_len(cb, dma_len);
903 		dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
904 			       dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
905 		dma_unmap_addr_set(cb, dma_addr, 0);
906 	}
907 }
908 
909 /* Reclaim queued SKBs for transmission completion, lockless version */
910 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
911 					     struct bcm_sysport_tx_ring *ring)
912 {
913 	unsigned int pkts_compl = 0, bytes_compl = 0;
914 	struct net_device *ndev = priv->netdev;
915 	unsigned int txbds_processed = 0;
916 	struct bcm_sysport_cb *cb;
917 	unsigned int txbds_ready;
918 	unsigned int c_index;
919 	u32 hw_ind;
920 
921 	/* Clear status before servicing to reduce spurious interrupts */
922 	if (!ring->priv->is_lite)
923 		intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
924 	else
925 		intrl2_0_writel(ring->priv, BIT(ring->index +
926 				INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
927 
928 	/* Compute how many descriptors have been processed since last call */
929 	hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
930 	c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
931 	txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
932 
933 	netif_dbg(priv, tx_done, ndev,
934 		  "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
935 		  ring->index, ring->c_index, c_index, txbds_ready);
936 
937 	while (txbds_processed < txbds_ready) {
938 		cb = &ring->cbs[ring->clean_index];
939 		bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
940 
941 		ring->desc_count++;
942 		txbds_processed++;
943 
944 		if (likely(ring->clean_index < ring->size - 1))
945 			ring->clean_index++;
946 		else
947 			ring->clean_index = 0;
948 	}
949 
950 	u64_stats_update_begin(&priv->syncp);
951 	ring->packets += pkts_compl;
952 	ring->bytes += bytes_compl;
953 	u64_stats_update_end(&priv->syncp);
954 
955 	ring->c_index = c_index;
956 
957 	netif_dbg(priv, tx_done, ndev,
958 		  "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
959 		  ring->index, ring->c_index, pkts_compl, bytes_compl);
960 
961 	return pkts_compl;
962 }
963 
964 /* Locked version of the per-ring TX reclaim routine */
965 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
966 					   struct bcm_sysport_tx_ring *ring)
967 {
968 	struct netdev_queue *txq;
969 	unsigned int released;
970 	unsigned long flags;
971 
972 	txq = netdev_get_tx_queue(priv->netdev, ring->index);
973 
974 	spin_lock_irqsave(&ring->lock, flags);
975 	released = __bcm_sysport_tx_reclaim(priv, ring);
976 	if (released)
977 		netif_tx_wake_queue(txq);
978 
979 	spin_unlock_irqrestore(&ring->lock, flags);
980 
981 	return released;
982 }
983 
984 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
985 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
986 				 struct bcm_sysport_tx_ring *ring)
987 {
988 	unsigned long flags;
989 
990 	spin_lock_irqsave(&ring->lock, flags);
991 	__bcm_sysport_tx_reclaim(priv, ring);
992 	spin_unlock_irqrestore(&ring->lock, flags);
993 }
994 
995 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
996 {
997 	struct bcm_sysport_tx_ring *ring =
998 		container_of(napi, struct bcm_sysport_tx_ring, napi);
999 	unsigned int work_done = 0;
1000 
1001 	work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
1002 
1003 	if (work_done == 0) {
1004 		napi_complete(napi);
1005 		/* re-enable TX interrupt */
1006 		if (!ring->priv->is_lite)
1007 			intrl2_1_mask_clear(ring->priv, BIT(ring->index));
1008 		else
1009 			intrl2_0_mask_clear(ring->priv, BIT(ring->index +
1010 					    INTRL2_0_TDMA_MBDONE_SHIFT));
1011 
1012 		return 0;
1013 	}
1014 
1015 	return budget;
1016 }
1017 
1018 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
1019 {
1020 	unsigned int q;
1021 
1022 	for (q = 0; q < priv->netdev->num_tx_queues; q++)
1023 		bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1024 }
1025 
1026 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1027 {
1028 	struct bcm_sysport_priv *priv =
1029 		container_of(napi, struct bcm_sysport_priv, napi);
1030 	struct dim_sample dim_sample = {};
1031 	unsigned int work_done = 0;
1032 
1033 	work_done = bcm_sysport_desc_rx(priv, budget);
1034 
1035 	priv->rx_c_index += work_done;
1036 	priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1037 
1038 	/* SYSTEMPORT Lite groups the producer/consumer index, producer is
1039 	 * maintained by HW, but writes to it will be ignore while RDMA
1040 	 * is active
1041 	 */
1042 	if (!priv->is_lite)
1043 		rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1044 	else
1045 		rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1046 
1047 	if (work_done < budget) {
1048 		napi_complete_done(napi, work_done);
1049 		/* re-enable RX interrupts */
1050 		intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1051 	}
1052 
1053 	if (priv->dim.use_dim) {
1054 		dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1055 				  priv->dim.bytes, &dim_sample);
1056 		net_dim(&priv->dim.dim, dim_sample);
1057 	}
1058 
1059 	return work_done;
1060 }
1061 
1062 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1063 {
1064 	u32 reg, bit;
1065 
1066 	reg = umac_readl(priv, UMAC_MPD_CTRL);
1067 	if (enable)
1068 		reg |= MPD_EN;
1069 	else
1070 		reg &= ~MPD_EN;
1071 	umac_writel(priv, reg, UMAC_MPD_CTRL);
1072 
1073 	if (priv->is_lite)
1074 		bit = RBUF_ACPI_EN_LITE;
1075 	else
1076 		bit = RBUF_ACPI_EN;
1077 
1078 	reg = rbuf_readl(priv, RBUF_CONTROL);
1079 	if (enable)
1080 		reg |= bit;
1081 	else
1082 		reg &= ~bit;
1083 	rbuf_writel(priv, reg, RBUF_CONTROL);
1084 }
1085 
1086 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1087 {
1088 	unsigned int index;
1089 	u32 reg;
1090 
1091 	/* Disable RXCHK, active filters and Broadcom tag matching */
1092 	reg = rxchk_readl(priv, RXCHK_CONTROL);
1093 	reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1094 		 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1095 	rxchk_writel(priv, reg, RXCHK_CONTROL);
1096 
1097 	/* Make sure we restore correct CID index in case HW lost
1098 	 * its context during deep idle state
1099 	 */
1100 	for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1101 		rxchk_writel(priv, priv->filters_loc[index] <<
1102 			     RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1103 		rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1104 	}
1105 
1106 	/* Clear the MagicPacket detection logic */
1107 	mpd_enable_set(priv, false);
1108 
1109 	reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1110 	if (reg & INTRL2_0_MPD)
1111 		netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1112 
1113 	if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1114 		reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1115 				  RXCHK_BRCM_TAG_MATCH_MASK;
1116 		netdev_info(priv->netdev,
1117 			    "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1118 	}
1119 
1120 	netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1121 }
1122 
1123 static void bcm_sysport_dim_work(struct work_struct *work)
1124 {
1125 	struct dim *dim = container_of(work, struct dim, work);
1126 	struct bcm_sysport_net_dim *ndim =
1127 			container_of(dim, struct bcm_sysport_net_dim, dim);
1128 	struct bcm_sysport_priv *priv =
1129 			container_of(ndim, struct bcm_sysport_priv, dim);
1130 	struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1131 								    dim->profile_ix);
1132 
1133 	bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1134 	dim->state = DIM_START_MEASURE;
1135 }
1136 
1137 /* RX and misc interrupt routine */
1138 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1139 {
1140 	struct net_device *dev = dev_id;
1141 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1142 	struct bcm_sysport_tx_ring *txr;
1143 	unsigned int ring, ring_bit;
1144 
1145 	priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1146 			  ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1147 	intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1148 
1149 	if (unlikely(priv->irq0_stat == 0)) {
1150 		netdev_warn(priv->netdev, "spurious RX interrupt\n");
1151 		return IRQ_NONE;
1152 	}
1153 
1154 	if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1155 		priv->dim.event_ctr++;
1156 		if (likely(napi_schedule_prep(&priv->napi))) {
1157 			/* disable RX interrupts */
1158 			intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1159 			__napi_schedule_irqoff(&priv->napi);
1160 		}
1161 	}
1162 
1163 	/* TX ring is full, perform a full reclaim since we do not know
1164 	 * which one would trigger this interrupt
1165 	 */
1166 	if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1167 		bcm_sysport_tx_reclaim_all(priv);
1168 
1169 	if (!priv->is_lite)
1170 		goto out;
1171 
1172 	for (ring = 0; ring < dev->num_tx_queues; ring++) {
1173 		ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1174 		if (!(priv->irq0_stat & ring_bit))
1175 			continue;
1176 
1177 		txr = &priv->tx_rings[ring];
1178 
1179 		if (likely(napi_schedule_prep(&txr->napi))) {
1180 			intrl2_0_mask_set(priv, ring_bit);
1181 			__napi_schedule(&txr->napi);
1182 		}
1183 	}
1184 out:
1185 	return IRQ_HANDLED;
1186 }
1187 
1188 /* TX interrupt service routine */
1189 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1190 {
1191 	struct net_device *dev = dev_id;
1192 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1193 	struct bcm_sysport_tx_ring *txr;
1194 	unsigned int ring;
1195 
1196 	priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1197 				~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1198 	intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1199 
1200 	if (unlikely(priv->irq1_stat == 0)) {
1201 		netdev_warn(priv->netdev, "spurious TX interrupt\n");
1202 		return IRQ_NONE;
1203 	}
1204 
1205 	for (ring = 0; ring < dev->num_tx_queues; ring++) {
1206 		if (!(priv->irq1_stat & BIT(ring)))
1207 			continue;
1208 
1209 		txr = &priv->tx_rings[ring];
1210 
1211 		if (likely(napi_schedule_prep(&txr->napi))) {
1212 			intrl2_1_mask_set(priv, BIT(ring));
1213 			__napi_schedule_irqoff(&txr->napi);
1214 		}
1215 	}
1216 
1217 	return IRQ_HANDLED;
1218 }
1219 
1220 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1221 {
1222 	struct bcm_sysport_priv *priv = dev_id;
1223 
1224 	pm_wakeup_event(&priv->pdev->dev, 0);
1225 
1226 	return IRQ_HANDLED;
1227 }
1228 
1229 #ifdef CONFIG_NET_POLL_CONTROLLER
1230 static void bcm_sysport_poll_controller(struct net_device *dev)
1231 {
1232 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1233 
1234 	disable_irq(priv->irq0);
1235 	bcm_sysport_rx_isr(priv->irq0, priv);
1236 	enable_irq(priv->irq0);
1237 
1238 	if (!priv->is_lite) {
1239 		disable_irq(priv->irq1);
1240 		bcm_sysport_tx_isr(priv->irq1, priv);
1241 		enable_irq(priv->irq1);
1242 	}
1243 }
1244 #endif
1245 
1246 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1247 					      struct net_device *dev)
1248 {
1249 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1250 	struct sk_buff *nskb;
1251 	struct bcm_tsb *tsb;
1252 	u32 csum_info;
1253 	u8 ip_proto;
1254 	u16 csum_start;
1255 	__be16 ip_ver;
1256 
1257 	/* Re-allocate SKB if needed */
1258 	if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1259 		nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1260 		if (!nskb) {
1261 			dev_kfree_skb_any(skb);
1262 			priv->mib.tx_realloc_tsb_failed++;
1263 			dev->stats.tx_errors++;
1264 			dev->stats.tx_dropped++;
1265 			return NULL;
1266 		}
1267 		dev_consume_skb_any(skb);
1268 		skb = nskb;
1269 		priv->mib.tx_realloc_tsb++;
1270 	}
1271 
1272 	tsb = skb_push(skb, sizeof(*tsb));
1273 	/* Zero-out TSB by default */
1274 	memset(tsb, 0, sizeof(*tsb));
1275 
1276 	if (skb_vlan_tag_present(skb)) {
1277 		tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1278 		tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1279 	}
1280 
1281 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
1282 		ip_ver = skb->protocol;
1283 		switch (ip_ver) {
1284 		case htons(ETH_P_IP):
1285 			ip_proto = ip_hdr(skb)->protocol;
1286 			break;
1287 		case htons(ETH_P_IPV6):
1288 			ip_proto = ipv6_hdr(skb)->nexthdr;
1289 			break;
1290 		default:
1291 			return skb;
1292 		}
1293 
1294 		/* Get the checksum offset and the L4 (transport) offset */
1295 		csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1296 		/* Account for the HW inserted VLAN tag */
1297 		if (skb_vlan_tag_present(skb))
1298 			csum_start += VLAN_HLEN;
1299 		csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1300 		csum_info |= (csum_start << L4_PTR_SHIFT);
1301 
1302 		if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1303 			csum_info |= L4_LENGTH_VALID;
1304 			if (ip_proto == IPPROTO_UDP &&
1305 			    ip_ver == htons(ETH_P_IP))
1306 				csum_info |= L4_UDP;
1307 		} else {
1308 			csum_info = 0;
1309 		}
1310 
1311 		tsb->l4_ptr_dest_map = csum_info;
1312 	}
1313 
1314 	return skb;
1315 }
1316 
1317 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1318 				    struct net_device *dev)
1319 {
1320 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1321 	struct device *kdev = &priv->pdev->dev;
1322 	struct bcm_sysport_tx_ring *ring;
1323 	unsigned long flags, desc_flags;
1324 	struct bcm_sysport_cb *cb;
1325 	struct netdev_queue *txq;
1326 	u32 len_status, addr_lo;
1327 	unsigned int skb_len;
1328 	dma_addr_t mapping;
1329 	u16 queue;
1330 	int ret;
1331 
1332 	queue = skb_get_queue_mapping(skb);
1333 	txq = netdev_get_tx_queue(dev, queue);
1334 	ring = &priv->tx_rings[queue];
1335 
1336 	/* lock against tx reclaim in BH context and TX ring full interrupt */
1337 	spin_lock_irqsave(&ring->lock, flags);
1338 	if (unlikely(ring->desc_count == 0)) {
1339 		netif_tx_stop_queue(txq);
1340 		netdev_err(dev, "queue %d awake and ring full!\n", queue);
1341 		ret = NETDEV_TX_BUSY;
1342 		goto out;
1343 	}
1344 
1345 	/* Insert TSB and checksum infos */
1346 	if (priv->tsb_en) {
1347 		skb = bcm_sysport_insert_tsb(skb, dev);
1348 		if (!skb) {
1349 			ret = NETDEV_TX_OK;
1350 			goto out;
1351 		}
1352 	}
1353 
1354 	skb_len = skb->len;
1355 
1356 	mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1357 	if (dma_mapping_error(kdev, mapping)) {
1358 		priv->mib.tx_dma_failed++;
1359 		netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1360 			  skb->data, skb_len);
1361 		ret = NETDEV_TX_OK;
1362 		goto out;
1363 	}
1364 
1365 	/* Remember the SKB for future freeing */
1366 	cb = &ring->cbs[ring->curr_desc];
1367 	cb->skb = skb;
1368 	dma_unmap_addr_set(cb, dma_addr, mapping);
1369 	dma_unmap_len_set(cb, dma_len, skb_len);
1370 
1371 	addr_lo = lower_32_bits(mapping);
1372 	len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1373 	len_status |= (skb_len << DESC_LEN_SHIFT);
1374 	len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1375 		       DESC_STATUS_SHIFT;
1376 	if (skb->ip_summed == CHECKSUM_PARTIAL)
1377 		len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1378 	if (skb_vlan_tag_present(skb))
1379 		len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1380 
1381 	ring->curr_desc++;
1382 	if (ring->curr_desc == ring->size)
1383 		ring->curr_desc = 0;
1384 	ring->desc_count--;
1385 
1386 	/* Ports are latched, so write upper address first */
1387 	spin_lock_irqsave(&priv->desc_lock, desc_flags);
1388 	tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1389 	tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1390 	spin_unlock_irqrestore(&priv->desc_lock, desc_flags);
1391 
1392 	/* Check ring space and update SW control flow */
1393 	if (ring->desc_count == 0)
1394 		netif_tx_stop_queue(txq);
1395 
1396 	netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1397 		  ring->index, ring->desc_count, ring->curr_desc);
1398 
1399 	ret = NETDEV_TX_OK;
1400 out:
1401 	spin_unlock_irqrestore(&ring->lock, flags);
1402 	return ret;
1403 }
1404 
1405 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1406 {
1407 	netdev_warn(dev, "transmit timeout!\n");
1408 
1409 	netif_trans_update(dev);
1410 	dev->stats.tx_errors++;
1411 
1412 	netif_tx_wake_all_queues(dev);
1413 }
1414 
1415 /* phylib adjust link callback */
1416 static void bcm_sysport_adj_link(struct net_device *dev)
1417 {
1418 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1419 	struct phy_device *phydev = dev->phydev;
1420 	unsigned int changed = 0;
1421 	u32 cmd_bits = 0, reg;
1422 
1423 	if (priv->old_link != phydev->link) {
1424 		changed = 1;
1425 		priv->old_link = phydev->link;
1426 	}
1427 
1428 	if (priv->old_duplex != phydev->duplex) {
1429 		changed = 1;
1430 		priv->old_duplex = phydev->duplex;
1431 	}
1432 
1433 	if (priv->is_lite)
1434 		goto out;
1435 
1436 	switch (phydev->speed) {
1437 	case SPEED_2500:
1438 		cmd_bits = CMD_SPEED_2500;
1439 		break;
1440 	case SPEED_1000:
1441 		cmd_bits = CMD_SPEED_1000;
1442 		break;
1443 	case SPEED_100:
1444 		cmd_bits = CMD_SPEED_100;
1445 		break;
1446 	case SPEED_10:
1447 		cmd_bits = CMD_SPEED_10;
1448 		break;
1449 	default:
1450 		break;
1451 	}
1452 	cmd_bits <<= CMD_SPEED_SHIFT;
1453 
1454 	if (phydev->duplex == DUPLEX_HALF)
1455 		cmd_bits |= CMD_HD_EN;
1456 
1457 	if (priv->old_pause != phydev->pause) {
1458 		changed = 1;
1459 		priv->old_pause = phydev->pause;
1460 	}
1461 
1462 	if (!phydev->pause)
1463 		cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1464 
1465 	if (!changed)
1466 		return;
1467 
1468 	if (phydev->link) {
1469 		reg = umac_readl(priv, UMAC_CMD);
1470 		reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1471 			CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1472 			CMD_TX_PAUSE_IGNORE);
1473 		reg |= cmd_bits;
1474 		umac_writel(priv, reg, UMAC_CMD);
1475 	}
1476 out:
1477 	if (changed)
1478 		phy_print_status(phydev);
1479 }
1480 
1481 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1482 				 void (*cb)(struct work_struct *work))
1483 {
1484 	struct bcm_sysport_net_dim *dim = &priv->dim;
1485 
1486 	INIT_WORK(&dim->dim.work, cb);
1487 	dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1488 	dim->event_ctr = 0;
1489 	dim->packets = 0;
1490 	dim->bytes = 0;
1491 }
1492 
1493 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1494 {
1495 	struct bcm_sysport_net_dim *dim = &priv->dim;
1496 	struct dim_cq_moder moder;
1497 	u32 usecs, pkts;
1498 
1499 	usecs = priv->rx_coalesce_usecs;
1500 	pkts = priv->rx_max_coalesced_frames;
1501 
1502 	/* If DIM was enabled, re-apply default parameters */
1503 	if (dim->use_dim) {
1504 		moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1505 		usecs = moder.usec;
1506 		pkts = moder.pkts;
1507 	}
1508 
1509 	bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1510 }
1511 
1512 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1513 				    unsigned int index)
1514 {
1515 	struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1516 	size_t size;
1517 	u32 reg;
1518 
1519 	/* Simple descriptors partitioning for now */
1520 	size = 256;
1521 
1522 	ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1523 	if (!ring->cbs) {
1524 		netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1525 		return -ENOMEM;
1526 	}
1527 
1528 	/* Initialize SW view of the ring */
1529 	spin_lock_init(&ring->lock);
1530 	ring->priv = priv;
1531 	netif_napi_add_tx(priv->netdev, &ring->napi, bcm_sysport_tx_poll);
1532 	ring->index = index;
1533 	ring->size = size;
1534 	ring->clean_index = 0;
1535 	ring->alloc_size = ring->size;
1536 	ring->desc_count = ring->size;
1537 	ring->curr_desc = 0;
1538 
1539 	/* Initialize HW ring */
1540 	tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1541 	tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1542 	tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1543 	tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1544 
1545 	/* Configure QID and port mapping */
1546 	reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1547 	reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1548 	if (ring->inspect) {
1549 		reg |= ring->switch_queue & RING_QID_MASK;
1550 		reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1551 	} else {
1552 		reg |= RING_IGNORE_STATUS;
1553 	}
1554 	tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1555 	reg = 0;
1556 	/* Adjust the packet size calculations if SYSTEMPORT is responsible
1557 	 * for HW insertion of VLAN tags
1558 	 */
1559 	if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1560 		reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1561 	tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1562 
1563 	/* Enable ACB algorithm 2 */
1564 	reg = tdma_readl(priv, TDMA_CONTROL);
1565 	reg |= tdma_control_bit(priv, ACB_ALGO);
1566 	tdma_writel(priv, reg, TDMA_CONTROL);
1567 
1568 	/* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1569 	 * with the original definition of ACB_ALGO
1570 	 */
1571 	reg = tdma_readl(priv, TDMA_CONTROL);
1572 	if (priv->is_lite)
1573 		reg &= ~BIT(TSB_SWAP1);
1574 	/* Set a correct TSB format based on host endian */
1575 	if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1576 		reg |= tdma_control_bit(priv, TSB_SWAP0);
1577 	else
1578 		reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1579 	tdma_writel(priv, reg, TDMA_CONTROL);
1580 
1581 	/* Program the number of descriptors as MAX_THRESHOLD and half of
1582 	 * its size for the hysteresis trigger
1583 	 */
1584 	tdma_writel(priv, ring->size |
1585 			1 << RING_HYST_THRESH_SHIFT,
1586 			TDMA_DESC_RING_MAX_HYST(index));
1587 
1588 	/* Enable the ring queue in the arbiter */
1589 	reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1590 	reg |= (1 << index);
1591 	tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1592 
1593 	napi_enable(&ring->napi);
1594 
1595 	netif_dbg(priv, hw, priv->netdev,
1596 		  "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1597 		  ring->size, ring->switch_queue,
1598 		  ring->switch_port);
1599 
1600 	return 0;
1601 }
1602 
1603 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1604 				     unsigned int index)
1605 {
1606 	struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1607 	u32 reg;
1608 
1609 	/* Caller should stop the TDMA engine */
1610 	reg = tdma_readl(priv, TDMA_STATUS);
1611 	if (!(reg & TDMA_DISABLED))
1612 		netdev_warn(priv->netdev, "TDMA not stopped!\n");
1613 
1614 	/* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1615 	 * fail, so by checking this pointer we know whether the TX ring was
1616 	 * fully initialized or not.
1617 	 */
1618 	if (!ring->cbs)
1619 		return;
1620 
1621 	napi_disable(&ring->napi);
1622 	netif_napi_del(&ring->napi);
1623 
1624 	bcm_sysport_tx_clean(priv, ring);
1625 
1626 	kfree(ring->cbs);
1627 	ring->cbs = NULL;
1628 	ring->size = 0;
1629 	ring->alloc_size = 0;
1630 
1631 	netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1632 }
1633 
1634 /* RDMA helper */
1635 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1636 				  unsigned int enable)
1637 {
1638 	unsigned int timeout = 1000;
1639 	u32 reg;
1640 
1641 	reg = rdma_readl(priv, RDMA_CONTROL);
1642 	if (enable)
1643 		reg |= RDMA_EN;
1644 	else
1645 		reg &= ~RDMA_EN;
1646 	rdma_writel(priv, reg, RDMA_CONTROL);
1647 
1648 	/* Poll for RMDA disabling completion */
1649 	do {
1650 		reg = rdma_readl(priv, RDMA_STATUS);
1651 		if (!!(reg & RDMA_DISABLED) == !enable)
1652 			return 0;
1653 		usleep_range(1000, 2000);
1654 	} while (timeout-- > 0);
1655 
1656 	netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1657 
1658 	return -ETIMEDOUT;
1659 }
1660 
1661 /* TDMA helper */
1662 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1663 				  unsigned int enable)
1664 {
1665 	unsigned int timeout = 1000;
1666 	u32 reg;
1667 
1668 	reg = tdma_readl(priv, TDMA_CONTROL);
1669 	if (enable)
1670 		reg |= tdma_control_bit(priv, TDMA_EN);
1671 	else
1672 		reg &= ~tdma_control_bit(priv, TDMA_EN);
1673 	tdma_writel(priv, reg, TDMA_CONTROL);
1674 
1675 	/* Poll for TMDA disabling completion */
1676 	do {
1677 		reg = tdma_readl(priv, TDMA_STATUS);
1678 		if (!!(reg & TDMA_DISABLED) == !enable)
1679 			return 0;
1680 
1681 		usleep_range(1000, 2000);
1682 	} while (timeout-- > 0);
1683 
1684 	netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1685 
1686 	return -ETIMEDOUT;
1687 }
1688 
1689 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1690 {
1691 	struct bcm_sysport_cb *cb;
1692 	u32 reg;
1693 	int ret;
1694 	int i;
1695 
1696 	/* Initialize SW view of the RX ring */
1697 	priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1698 	priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1699 	priv->rx_c_index = 0;
1700 	priv->rx_read_ptr = 0;
1701 	priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1702 				GFP_KERNEL);
1703 	if (!priv->rx_cbs) {
1704 		netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1705 		return -ENOMEM;
1706 	}
1707 
1708 	for (i = 0; i < priv->num_rx_bds; i++) {
1709 		cb = priv->rx_cbs + i;
1710 		cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1711 	}
1712 
1713 	ret = bcm_sysport_alloc_rx_bufs(priv);
1714 	if (ret) {
1715 		netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1716 		return ret;
1717 	}
1718 
1719 	/* Initialize HW, ensure RDMA is disabled */
1720 	reg = rdma_readl(priv, RDMA_STATUS);
1721 	if (!(reg & RDMA_DISABLED))
1722 		rdma_enable_set(priv, 0);
1723 
1724 	rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1725 	rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1726 	rdma_writel(priv, 0, RDMA_PROD_INDEX);
1727 	rdma_writel(priv, 0, RDMA_CONS_INDEX);
1728 	rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1729 			  RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1730 	/* Operate the queue in ring mode */
1731 	rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1732 	rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1733 	rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1734 	rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1735 
1736 	netif_dbg(priv, hw, priv->netdev,
1737 		  "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1738 		  priv->num_rx_bds, priv->rx_bds);
1739 
1740 	return 0;
1741 }
1742 
1743 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1744 {
1745 	struct bcm_sysport_cb *cb;
1746 	unsigned int i;
1747 	u32 reg;
1748 
1749 	/* Caller should ensure RDMA is disabled */
1750 	reg = rdma_readl(priv, RDMA_STATUS);
1751 	if (!(reg & RDMA_DISABLED))
1752 		netdev_warn(priv->netdev, "RDMA not stopped!\n");
1753 
1754 	for (i = 0; i < priv->num_rx_bds; i++) {
1755 		cb = &priv->rx_cbs[i];
1756 		if (dma_unmap_addr(cb, dma_addr))
1757 			dma_unmap_single(&priv->pdev->dev,
1758 					 dma_unmap_addr(cb, dma_addr),
1759 					 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1760 		bcm_sysport_free_cb(cb);
1761 	}
1762 
1763 	kfree(priv->rx_cbs);
1764 	priv->rx_cbs = NULL;
1765 
1766 	netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1767 }
1768 
1769 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1770 {
1771 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1772 	u32 reg;
1773 
1774 	if (priv->is_lite)
1775 		return;
1776 
1777 	reg = umac_readl(priv, UMAC_CMD);
1778 	if (dev->flags & IFF_PROMISC)
1779 		reg |= CMD_PROMISC;
1780 	else
1781 		reg &= ~CMD_PROMISC;
1782 	umac_writel(priv, reg, UMAC_CMD);
1783 
1784 	/* No support for ALLMULTI */
1785 	if (dev->flags & IFF_ALLMULTI)
1786 		return;
1787 }
1788 
1789 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1790 				   u32 mask, unsigned int enable)
1791 {
1792 	u32 reg;
1793 
1794 	if (!priv->is_lite) {
1795 		reg = umac_readl(priv, UMAC_CMD);
1796 		if (enable)
1797 			reg |= mask;
1798 		else
1799 			reg &= ~mask;
1800 		umac_writel(priv, reg, UMAC_CMD);
1801 	} else {
1802 		reg = gib_readl(priv, GIB_CONTROL);
1803 		if (enable)
1804 			reg |= mask;
1805 		else
1806 			reg &= ~mask;
1807 		gib_writel(priv, reg, GIB_CONTROL);
1808 	}
1809 
1810 	/* UniMAC stops on a packet boundary, wait for a full-sized packet
1811 	 * to be processed (1 msec).
1812 	 */
1813 	if (enable == 0)
1814 		usleep_range(1000, 2000);
1815 }
1816 
1817 static inline void umac_reset(struct bcm_sysport_priv *priv)
1818 {
1819 	u32 reg;
1820 
1821 	if (priv->is_lite)
1822 		return;
1823 
1824 	reg = umac_readl(priv, UMAC_CMD);
1825 	reg |= CMD_SW_RESET;
1826 	umac_writel(priv, reg, UMAC_CMD);
1827 	udelay(10);
1828 	reg = umac_readl(priv, UMAC_CMD);
1829 	reg &= ~CMD_SW_RESET;
1830 	umac_writel(priv, reg, UMAC_CMD);
1831 }
1832 
1833 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1834 			     const unsigned char *addr)
1835 {
1836 	u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1837 		    addr[3];
1838 	u32 mac1 = (addr[4] << 8) | addr[5];
1839 
1840 	if (!priv->is_lite) {
1841 		umac_writel(priv, mac0, UMAC_MAC0);
1842 		umac_writel(priv, mac1, UMAC_MAC1);
1843 	} else {
1844 		gib_writel(priv, mac0, GIB_MAC0);
1845 		gib_writel(priv, mac1, GIB_MAC1);
1846 	}
1847 }
1848 
1849 static void topctrl_flush(struct bcm_sysport_priv *priv)
1850 {
1851 	topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1852 	topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1853 	mdelay(1);
1854 	topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1855 	topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1856 }
1857 
1858 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1859 {
1860 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1861 	struct sockaddr *addr = p;
1862 
1863 	if (!is_valid_ether_addr(addr->sa_data))
1864 		return -EINVAL;
1865 
1866 	eth_hw_addr_set(dev, addr->sa_data);
1867 
1868 	/* interface is disabled, changes to MAC will be reflected on next
1869 	 * open call
1870 	 */
1871 	if (!netif_running(dev))
1872 		return 0;
1873 
1874 	umac_set_hw_addr(priv, dev->dev_addr);
1875 
1876 	return 0;
1877 }
1878 
1879 static void bcm_sysport_get_stats64(struct net_device *dev,
1880 				    struct rtnl_link_stats64 *stats)
1881 {
1882 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1883 	struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1884 	unsigned int start;
1885 
1886 	netdev_stats_to_stats64(stats, &dev->stats);
1887 
1888 	bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1889 				    &stats->tx_packets);
1890 
1891 	do {
1892 		start = u64_stats_fetch_begin(&priv->syncp);
1893 		stats->rx_packets = stats64->rx_packets;
1894 		stats->rx_bytes = stats64->rx_bytes;
1895 	} while (u64_stats_fetch_retry(&priv->syncp, start));
1896 }
1897 
1898 static void bcm_sysport_netif_start(struct net_device *dev)
1899 {
1900 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1901 
1902 	/* Enable NAPI */
1903 	bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1904 	bcm_sysport_init_rx_coalesce(priv);
1905 	napi_enable(&priv->napi);
1906 
1907 	/* Enable RX interrupt and TX ring full interrupt */
1908 	intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1909 
1910 	phy_start(dev->phydev);
1911 
1912 	/* Enable TX interrupts for the TXQs */
1913 	if (!priv->is_lite)
1914 		intrl2_1_mask_clear(priv, 0xffffffff);
1915 	else
1916 		intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1917 }
1918 
1919 static void rbuf_init(struct bcm_sysport_priv *priv)
1920 {
1921 	u32 reg;
1922 
1923 	reg = rbuf_readl(priv, RBUF_CONTROL);
1924 	reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1925 	/* Set a correct RSB format on SYSTEMPORT Lite */
1926 	if (priv->is_lite)
1927 		reg &= ~RBUF_RSB_SWAP1;
1928 
1929 	/* Set a correct RSB format based on host endian */
1930 	if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1931 		reg |= RBUF_RSB_SWAP0;
1932 	else
1933 		reg &= ~RBUF_RSB_SWAP0;
1934 	rbuf_writel(priv, reg, RBUF_CONTROL);
1935 }
1936 
1937 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1938 {
1939 	intrl2_0_mask_set(priv, 0xffffffff);
1940 	intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1941 	if (!priv->is_lite) {
1942 		intrl2_1_mask_set(priv, 0xffffffff);
1943 		intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1944 	}
1945 }
1946 
1947 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1948 {
1949 	u32 reg;
1950 
1951 	reg = gib_readl(priv, GIB_CONTROL);
1952 	/* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1953 	if (netdev_uses_dsa(priv->netdev)) {
1954 		reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1955 		reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1956 	}
1957 	reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1958 	reg |= 12 << GIB_IPG_LEN_SHIFT;
1959 	gib_writel(priv, reg, GIB_CONTROL);
1960 }
1961 
1962 static int bcm_sysport_open(struct net_device *dev)
1963 {
1964 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1965 	struct phy_device *phydev;
1966 	unsigned int i;
1967 	int ret;
1968 
1969 	clk_prepare_enable(priv->clk);
1970 
1971 	/* Reset UniMAC */
1972 	umac_reset(priv);
1973 
1974 	/* Flush TX and RX FIFOs at TOPCTRL level */
1975 	topctrl_flush(priv);
1976 
1977 	/* Disable the UniMAC RX/TX */
1978 	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1979 
1980 	/* Enable RBUF 2bytes alignment and Receive Status Block */
1981 	rbuf_init(priv);
1982 
1983 	/* Set maximum frame length */
1984 	if (!priv->is_lite)
1985 		umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1986 	else
1987 		gib_set_pad_extension(priv);
1988 
1989 	/* Apply features again in case we changed them while interface was
1990 	 * down
1991 	 */
1992 	bcm_sysport_set_features(dev, dev->features);
1993 
1994 	/* Set MAC address */
1995 	umac_set_hw_addr(priv, dev->dev_addr);
1996 
1997 	phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1998 				0, priv->phy_interface);
1999 	if (!phydev) {
2000 		netdev_err(dev, "could not attach to PHY\n");
2001 		ret = -ENODEV;
2002 		goto out_clk_disable;
2003 	}
2004 
2005 	/* Indicate that the MAC is responsible for PHY PM */
2006 	phydev->mac_managed_pm = true;
2007 
2008 	/* Reset house keeping link status */
2009 	priv->old_duplex = -1;
2010 	priv->old_link = -1;
2011 	priv->old_pause = -1;
2012 
2013 	/* mask all interrupts and request them */
2014 	bcm_sysport_mask_all_intrs(priv);
2015 
2016 	ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
2017 	if (ret) {
2018 		netdev_err(dev, "failed to request RX interrupt\n");
2019 		goto out_phy_disconnect;
2020 	}
2021 
2022 	if (!priv->is_lite) {
2023 		ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2024 				  dev->name, dev);
2025 		if (ret) {
2026 			netdev_err(dev, "failed to request TX interrupt\n");
2027 			goto out_free_irq0;
2028 		}
2029 	}
2030 
2031 	/* Initialize both hardware and software ring */
2032 	spin_lock_init(&priv->desc_lock);
2033 	for (i = 0; i < dev->num_tx_queues; i++) {
2034 		ret = bcm_sysport_init_tx_ring(priv, i);
2035 		if (ret) {
2036 			netdev_err(dev, "failed to initialize TX ring %d\n",
2037 				   i);
2038 			goto out_free_tx_ring;
2039 		}
2040 	}
2041 
2042 	/* Initialize linked-list */
2043 	tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2044 
2045 	/* Initialize RX ring */
2046 	ret = bcm_sysport_init_rx_ring(priv);
2047 	if (ret) {
2048 		netdev_err(dev, "failed to initialize RX ring\n");
2049 		goto out_free_rx_ring;
2050 	}
2051 
2052 	/* Turn on RDMA */
2053 	ret = rdma_enable_set(priv, 1);
2054 	if (ret)
2055 		goto out_free_rx_ring;
2056 
2057 	/* Turn on TDMA */
2058 	ret = tdma_enable_set(priv, 1);
2059 	if (ret)
2060 		goto out_clear_rx_int;
2061 
2062 	/* Turn on UniMAC TX/RX */
2063 	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2064 
2065 	bcm_sysport_netif_start(dev);
2066 
2067 	netif_tx_start_all_queues(dev);
2068 
2069 	return 0;
2070 
2071 out_clear_rx_int:
2072 	intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2073 out_free_rx_ring:
2074 	bcm_sysport_fini_rx_ring(priv);
2075 out_free_tx_ring:
2076 	for (i = 0; i < dev->num_tx_queues; i++)
2077 		bcm_sysport_fini_tx_ring(priv, i);
2078 	if (!priv->is_lite)
2079 		free_irq(priv->irq1, dev);
2080 out_free_irq0:
2081 	free_irq(priv->irq0, dev);
2082 out_phy_disconnect:
2083 	phy_disconnect(phydev);
2084 out_clk_disable:
2085 	clk_disable_unprepare(priv->clk);
2086 	return ret;
2087 }
2088 
2089 static void bcm_sysport_netif_stop(struct net_device *dev)
2090 {
2091 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2092 
2093 	/* stop all software from updating hardware */
2094 	netif_tx_disable(dev);
2095 	napi_disable(&priv->napi);
2096 	cancel_work_sync(&priv->dim.dim.work);
2097 	phy_stop(dev->phydev);
2098 
2099 	/* mask all interrupts */
2100 	bcm_sysport_mask_all_intrs(priv);
2101 }
2102 
2103 static int bcm_sysport_stop(struct net_device *dev)
2104 {
2105 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2106 	unsigned int i;
2107 	int ret;
2108 
2109 	bcm_sysport_netif_stop(dev);
2110 
2111 	/* Disable UniMAC RX */
2112 	umac_enable_set(priv, CMD_RX_EN, 0);
2113 
2114 	ret = tdma_enable_set(priv, 0);
2115 	if (ret) {
2116 		netdev_err(dev, "timeout disabling RDMA\n");
2117 		return ret;
2118 	}
2119 
2120 	/* Wait for a maximum packet size to be drained */
2121 	usleep_range(2000, 3000);
2122 
2123 	ret = rdma_enable_set(priv, 0);
2124 	if (ret) {
2125 		netdev_err(dev, "timeout disabling TDMA\n");
2126 		return ret;
2127 	}
2128 
2129 	/* Disable UniMAC TX */
2130 	umac_enable_set(priv, CMD_TX_EN, 0);
2131 
2132 	/* Free RX/TX rings SW structures */
2133 	for (i = 0; i < dev->num_tx_queues; i++)
2134 		bcm_sysport_fini_tx_ring(priv, i);
2135 	bcm_sysport_fini_rx_ring(priv);
2136 
2137 	free_irq(priv->irq0, dev);
2138 	if (!priv->is_lite)
2139 		free_irq(priv->irq1, dev);
2140 
2141 	/* Disconnect from PHY */
2142 	phy_disconnect(dev->phydev);
2143 
2144 	clk_disable_unprepare(priv->clk);
2145 
2146 	return 0;
2147 }
2148 
2149 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2150 				 u64 location)
2151 {
2152 	unsigned int index;
2153 	u32 reg;
2154 
2155 	for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2156 		reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2157 		reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2158 		reg &= RXCHK_BRCM_TAG_CID_MASK;
2159 		if (reg == location)
2160 			return index;
2161 	}
2162 
2163 	return -EINVAL;
2164 }
2165 
2166 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2167 				struct ethtool_rxnfc *nfc)
2168 {
2169 	int index;
2170 
2171 	/* This is not a rule that we know about */
2172 	index = bcm_sysport_rule_find(priv, nfc->fs.location);
2173 	if (index < 0)
2174 		return -EOPNOTSUPP;
2175 
2176 	nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2177 
2178 	return 0;
2179 }
2180 
2181 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2182 				struct ethtool_rxnfc *nfc)
2183 {
2184 	unsigned int index;
2185 	u32 reg;
2186 
2187 	/* We cannot match locations greater than what the classification ID
2188 	 * permits (256 entries)
2189 	 */
2190 	if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2191 		return -E2BIG;
2192 
2193 	/* We cannot support flows that are not destined for a wake-up */
2194 	if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2195 		return -EOPNOTSUPP;
2196 
2197 	index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2198 	if (index >= RXCHK_BRCM_TAG_MAX)
2199 		/* All filters are already in use, we cannot match more rules */
2200 		return -ENOSPC;
2201 
2202 	/* Location is the classification ID, and index is the position
2203 	 * within one of our 8 possible filters to be programmed
2204 	 */
2205 	reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2206 	reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2207 	reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2208 	rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2209 	rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2210 
2211 	priv->filters_loc[index] = nfc->fs.location;
2212 	set_bit(index, priv->filters);
2213 
2214 	return 0;
2215 }
2216 
2217 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2218 				u64 location)
2219 {
2220 	int index;
2221 
2222 	/* This is not a rule that we know about */
2223 	index = bcm_sysport_rule_find(priv, location);
2224 	if (index < 0)
2225 		return -EOPNOTSUPP;
2226 
2227 	/* No need to disable this filter if it was enabled, this will
2228 	 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2229 	 */
2230 	clear_bit(index, priv->filters);
2231 	priv->filters_loc[index] = 0;
2232 
2233 	return 0;
2234 }
2235 
2236 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2237 				 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2238 {
2239 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2240 	int ret = -EOPNOTSUPP;
2241 
2242 	switch (nfc->cmd) {
2243 	case ETHTOOL_GRXCLSRULE:
2244 		ret = bcm_sysport_rule_get(priv, nfc);
2245 		break;
2246 	default:
2247 		break;
2248 	}
2249 
2250 	return ret;
2251 }
2252 
2253 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2254 				 struct ethtool_rxnfc *nfc)
2255 {
2256 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2257 	int ret = -EOPNOTSUPP;
2258 
2259 	switch (nfc->cmd) {
2260 	case ETHTOOL_SRXCLSRLINS:
2261 		ret = bcm_sysport_rule_set(priv, nfc);
2262 		break;
2263 	case ETHTOOL_SRXCLSRLDEL:
2264 		ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2265 		break;
2266 	default:
2267 		break;
2268 	}
2269 
2270 	return ret;
2271 }
2272 
2273 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2274 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2275 				     ETHTOOL_COALESCE_MAX_FRAMES |
2276 				     ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2277 	.get_drvinfo		= bcm_sysport_get_drvinfo,
2278 	.get_msglevel		= bcm_sysport_get_msglvl,
2279 	.set_msglevel		= bcm_sysport_set_msglvl,
2280 	.get_link		= ethtool_op_get_link,
2281 	.get_strings		= bcm_sysport_get_strings,
2282 	.get_ethtool_stats	= bcm_sysport_get_stats,
2283 	.get_sset_count		= bcm_sysport_get_sset_count,
2284 	.get_wol		= bcm_sysport_get_wol,
2285 	.set_wol		= bcm_sysport_set_wol,
2286 	.get_coalesce		= bcm_sysport_get_coalesce,
2287 	.set_coalesce		= bcm_sysport_set_coalesce,
2288 	.get_link_ksettings     = phy_ethtool_get_link_ksettings,
2289 	.set_link_ksettings     = phy_ethtool_set_link_ksettings,
2290 	.get_rxnfc		= bcm_sysport_get_rxnfc,
2291 	.set_rxnfc		= bcm_sysport_set_rxnfc,
2292 };
2293 
2294 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2295 				    struct net_device *sb_dev)
2296 {
2297 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2298 	u16 queue = skb_get_queue_mapping(skb);
2299 	struct bcm_sysport_tx_ring *tx_ring;
2300 	unsigned int q, port;
2301 
2302 	if (!netdev_uses_dsa(dev))
2303 		return netdev_pick_tx(dev, skb, NULL);
2304 
2305 	/* DSA tagging layer will have configured the correct queue */
2306 	q = BRCM_TAG_GET_QUEUE(queue);
2307 	port = BRCM_TAG_GET_PORT(queue);
2308 	tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2309 
2310 	if (unlikely(!tx_ring))
2311 		return netdev_pick_tx(dev, skb, NULL);
2312 
2313 	return tx_ring->index;
2314 }
2315 
2316 static const struct net_device_ops bcm_sysport_netdev_ops = {
2317 	.ndo_start_xmit		= bcm_sysport_xmit,
2318 	.ndo_tx_timeout		= bcm_sysport_tx_timeout,
2319 	.ndo_open		= bcm_sysport_open,
2320 	.ndo_stop		= bcm_sysport_stop,
2321 	.ndo_set_features	= bcm_sysport_set_features,
2322 	.ndo_set_rx_mode	= bcm_sysport_set_rx_mode,
2323 	.ndo_set_mac_address	= bcm_sysport_change_mac,
2324 #ifdef CONFIG_NET_POLL_CONTROLLER
2325 	.ndo_poll_controller	= bcm_sysport_poll_controller,
2326 #endif
2327 	.ndo_get_stats64	= bcm_sysport_get_stats64,
2328 	.ndo_select_queue	= bcm_sysport_select_queue,
2329 };
2330 
2331 static int bcm_sysport_map_queues(struct net_device *dev,
2332 				  struct net_device *slave_dev)
2333 {
2334 	struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2335 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2336 	struct bcm_sysport_tx_ring *ring;
2337 	unsigned int num_tx_queues;
2338 	unsigned int q, qp, port;
2339 
2340 	/* We can't be setting up queue inspection for non directly attached
2341 	 * switches
2342 	 */
2343 	if (dp->ds->index)
2344 		return 0;
2345 
2346 	port = dp->index;
2347 
2348 	/* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2349 	 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2350 	 * per-port (slave_dev) network devices queue, we achieve just that.
2351 	 * This need to happen now before any slave network device is used such
2352 	 * it accurately reflects the number of real TX queues.
2353 	 */
2354 	if (priv->is_lite)
2355 		netif_set_real_num_tx_queues(slave_dev,
2356 					     slave_dev->num_tx_queues / 2);
2357 
2358 	num_tx_queues = slave_dev->real_num_tx_queues;
2359 
2360 	if (priv->per_port_num_tx_queues &&
2361 	    priv->per_port_num_tx_queues != num_tx_queues)
2362 		netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2363 
2364 	priv->per_port_num_tx_queues = num_tx_queues;
2365 
2366 	for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2367 	     q++) {
2368 		ring = &priv->tx_rings[q];
2369 
2370 		if (ring->inspect)
2371 			continue;
2372 
2373 		/* Just remember the mapping actual programming done
2374 		 * during bcm_sysport_init_tx_ring
2375 		 */
2376 		ring->switch_queue = qp;
2377 		ring->switch_port = port;
2378 		ring->inspect = true;
2379 		priv->ring_map[qp + port * num_tx_queues] = ring;
2380 		qp++;
2381 	}
2382 
2383 	return 0;
2384 }
2385 
2386 static int bcm_sysport_unmap_queues(struct net_device *dev,
2387 				    struct net_device *slave_dev)
2388 {
2389 	struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2390 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2391 	struct bcm_sysport_tx_ring *ring;
2392 	unsigned int num_tx_queues;
2393 	unsigned int q, qp, port;
2394 
2395 	port = dp->index;
2396 
2397 	num_tx_queues = slave_dev->real_num_tx_queues;
2398 
2399 	for (q = 0; q < dev->num_tx_queues; q++) {
2400 		ring = &priv->tx_rings[q];
2401 
2402 		if (ring->switch_port != port)
2403 			continue;
2404 
2405 		if (!ring->inspect)
2406 			continue;
2407 
2408 		ring->inspect = false;
2409 		qp = ring->switch_queue;
2410 		priv->ring_map[qp + port * num_tx_queues] = NULL;
2411 	}
2412 
2413 	return 0;
2414 }
2415 
2416 static int bcm_sysport_netdevice_event(struct notifier_block *nb,
2417 				       unsigned long event, void *ptr)
2418 {
2419 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2420 	struct netdev_notifier_changeupper_info *info = ptr;
2421 	struct bcm_sysport_priv *priv;
2422 	int ret = 0;
2423 
2424 	priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier);
2425 	if (priv->netdev != dev)
2426 		return NOTIFY_DONE;
2427 
2428 	switch (event) {
2429 	case NETDEV_CHANGEUPPER:
2430 		if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2431 			return NOTIFY_DONE;
2432 
2433 		if (!dsa_slave_dev_check(info->upper_dev))
2434 			return NOTIFY_DONE;
2435 
2436 		if (info->linking)
2437 			ret = bcm_sysport_map_queues(dev, info->upper_dev);
2438 		else
2439 			ret = bcm_sysport_unmap_queues(dev, info->upper_dev);
2440 		break;
2441 	}
2442 
2443 	return notifier_from_errno(ret);
2444 }
2445 
2446 #define REV_FMT	"v%2x.%02x"
2447 
2448 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2449 	[SYSTEMPORT] = {
2450 		.is_lite = false,
2451 		.num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2452 	},
2453 	[SYSTEMPORT_LITE] = {
2454 		.is_lite = true,
2455 		.num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2456 	},
2457 };
2458 
2459 static const struct of_device_id bcm_sysport_of_match[] = {
2460 	{ .compatible = "brcm,systemportlite-v1.00",
2461 	  .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2462 	{ .compatible = "brcm,systemport-v1.00",
2463 	  .data = &bcm_sysport_params[SYSTEMPORT] },
2464 	{ .compatible = "brcm,systemport",
2465 	  .data = &bcm_sysport_params[SYSTEMPORT] },
2466 	{ /* sentinel */ }
2467 };
2468 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2469 
2470 static int bcm_sysport_probe(struct platform_device *pdev)
2471 {
2472 	const struct bcm_sysport_hw_params *params;
2473 	const struct of_device_id *of_id = NULL;
2474 	struct bcm_sysport_priv *priv;
2475 	struct device_node *dn;
2476 	struct net_device *dev;
2477 	u32 txq, rxq;
2478 	int ret;
2479 
2480 	dn = pdev->dev.of_node;
2481 	of_id = of_match_node(bcm_sysport_of_match, dn);
2482 	if (!of_id || !of_id->data)
2483 		return -EINVAL;
2484 
2485 	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2486 	if (ret)
2487 		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2488 	if (ret) {
2489 		dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2490 		return ret;
2491 	}
2492 
2493 	/* Fairly quickly we need to know the type of adapter we have */
2494 	params = of_id->data;
2495 
2496 	/* Read the Transmit/Receive Queue properties */
2497 	if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2498 		txq = TDMA_NUM_RINGS;
2499 	if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2500 		rxq = 1;
2501 
2502 	/* Sanity check the number of transmit queues */
2503 	if (!txq || txq > TDMA_NUM_RINGS)
2504 		return -EINVAL;
2505 
2506 	dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2507 	if (!dev)
2508 		return -ENOMEM;
2509 
2510 	/* Initialize private members */
2511 	priv = netdev_priv(dev);
2512 
2513 	priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
2514 	if (IS_ERR(priv->clk)) {
2515 		ret = PTR_ERR(priv->clk);
2516 		goto err_free_netdev;
2517 	}
2518 
2519 	/* Allocate number of TX rings */
2520 	priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2521 				      sizeof(struct bcm_sysport_tx_ring),
2522 				      GFP_KERNEL);
2523 	if (!priv->tx_rings) {
2524 		ret = -ENOMEM;
2525 		goto err_free_netdev;
2526 	}
2527 
2528 	priv->is_lite = params->is_lite;
2529 	priv->num_rx_desc_words = params->num_rx_desc_words;
2530 
2531 	priv->irq0 = platform_get_irq(pdev, 0);
2532 	if (!priv->is_lite) {
2533 		priv->irq1 = platform_get_irq(pdev, 1);
2534 		priv->wol_irq = platform_get_irq_optional(pdev, 2);
2535 	} else {
2536 		priv->wol_irq = platform_get_irq_optional(pdev, 1);
2537 	}
2538 	if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2539 		ret = -EINVAL;
2540 		goto err_free_netdev;
2541 	}
2542 
2543 	priv->base = devm_platform_ioremap_resource(pdev, 0);
2544 	if (IS_ERR(priv->base)) {
2545 		ret = PTR_ERR(priv->base);
2546 		goto err_free_netdev;
2547 	}
2548 
2549 	priv->netdev = dev;
2550 	priv->pdev = pdev;
2551 
2552 	ret = of_get_phy_mode(dn, &priv->phy_interface);
2553 	/* Default to GMII interface mode */
2554 	if (ret)
2555 		priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2556 
2557 	/* In the case of a fixed PHY, the DT node associated
2558 	 * to the PHY is the Ethernet MAC DT node.
2559 	 */
2560 	if (of_phy_is_fixed_link(dn)) {
2561 		ret = of_phy_register_fixed_link(dn);
2562 		if (ret) {
2563 			dev_err(&pdev->dev, "failed to register fixed PHY\n");
2564 			goto err_free_netdev;
2565 		}
2566 
2567 		priv->phy_dn = dn;
2568 	}
2569 
2570 	/* Initialize netdevice members */
2571 	ret = of_get_ethdev_address(dn, dev);
2572 	if (ret) {
2573 		dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2574 		eth_hw_addr_random(dev);
2575 	}
2576 
2577 	SET_NETDEV_DEV(dev, &pdev->dev);
2578 	dev_set_drvdata(&pdev->dev, dev);
2579 	dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2580 	dev->netdev_ops = &bcm_sysport_netdev_ops;
2581 	netif_napi_add(dev, &priv->napi, bcm_sysport_poll);
2582 
2583 	dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2584 			 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2585 			 NETIF_F_HW_VLAN_CTAG_TX;
2586 	dev->hw_features |= dev->features;
2587 	dev->vlan_features |= dev->features;
2588 	dev->max_mtu = UMAC_MAX_MTU_SIZE;
2589 
2590 	/* Request the WOL interrupt and advertise suspend if available */
2591 	priv->wol_irq_disabled = 1;
2592 	ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2593 			       bcm_sysport_wol_isr, 0, dev->name, priv);
2594 	if (!ret)
2595 		device_set_wakeup_capable(&pdev->dev, 1);
2596 
2597 	priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol");
2598 	if (IS_ERR(priv->wol_clk)) {
2599 		ret = PTR_ERR(priv->wol_clk);
2600 		goto err_deregister_fixed_link;
2601 	}
2602 
2603 	/* Set the needed headroom once and for all */
2604 	BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2605 	dev->needed_headroom += sizeof(struct bcm_tsb);
2606 
2607 	/* libphy will adjust the link state accordingly */
2608 	netif_carrier_off(dev);
2609 
2610 	priv->rx_max_coalesced_frames = 1;
2611 	u64_stats_init(&priv->syncp);
2612 
2613 	priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event;
2614 
2615 	ret = register_netdevice_notifier(&priv->netdev_notifier);
2616 	if (ret) {
2617 		dev_err(&pdev->dev, "failed to register DSA notifier\n");
2618 		goto err_deregister_fixed_link;
2619 	}
2620 
2621 	ret = register_netdev(dev);
2622 	if (ret) {
2623 		dev_err(&pdev->dev, "failed to register net_device\n");
2624 		goto err_deregister_notifier;
2625 	}
2626 
2627 	clk_prepare_enable(priv->clk);
2628 
2629 	priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2630 	dev_info(&pdev->dev,
2631 		 "Broadcom SYSTEMPORT%s " REV_FMT
2632 		 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2633 		 priv->is_lite ? " Lite" : "",
2634 		 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2635 		 priv->irq0, priv->irq1, txq, rxq);
2636 
2637 	clk_disable_unprepare(priv->clk);
2638 
2639 	return 0;
2640 
2641 err_deregister_notifier:
2642 	unregister_netdevice_notifier(&priv->netdev_notifier);
2643 err_deregister_fixed_link:
2644 	if (of_phy_is_fixed_link(dn))
2645 		of_phy_deregister_fixed_link(dn);
2646 err_free_netdev:
2647 	free_netdev(dev);
2648 	return ret;
2649 }
2650 
2651 static int bcm_sysport_remove(struct platform_device *pdev)
2652 {
2653 	struct net_device *dev = dev_get_drvdata(&pdev->dev);
2654 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2655 	struct device_node *dn = pdev->dev.of_node;
2656 
2657 	/* Not much to do, ndo_close has been called
2658 	 * and we use managed allocations
2659 	 */
2660 	unregister_netdevice_notifier(&priv->netdev_notifier);
2661 	unregister_netdev(dev);
2662 	if (of_phy_is_fixed_link(dn))
2663 		of_phy_deregister_fixed_link(dn);
2664 	free_netdev(dev);
2665 	dev_set_drvdata(&pdev->dev, NULL);
2666 
2667 	return 0;
2668 }
2669 
2670 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2671 {
2672 	struct net_device *ndev = priv->netdev;
2673 	unsigned int timeout = 1000;
2674 	unsigned int index, i = 0;
2675 	u32 reg;
2676 
2677 	reg = umac_readl(priv, UMAC_MPD_CTRL);
2678 	if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2679 		reg |= MPD_EN;
2680 	reg &= ~PSW_EN;
2681 	if (priv->wolopts & WAKE_MAGICSECURE) {
2682 		/* Program the SecureOn password */
2683 		umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2684 			    UMAC_PSW_MS);
2685 		umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2686 			    UMAC_PSW_LS);
2687 		reg |= PSW_EN;
2688 	}
2689 	umac_writel(priv, reg, UMAC_MPD_CTRL);
2690 
2691 	if (priv->wolopts & WAKE_FILTER) {
2692 		/* Turn on ACPI matching to steal packets from RBUF */
2693 		reg = rbuf_readl(priv, RBUF_CONTROL);
2694 		if (priv->is_lite)
2695 			reg |= RBUF_ACPI_EN_LITE;
2696 		else
2697 			reg |= RBUF_ACPI_EN;
2698 		rbuf_writel(priv, reg, RBUF_CONTROL);
2699 
2700 		/* Enable RXCHK, active filters and Broadcom tag matching */
2701 		reg = rxchk_readl(priv, RXCHK_CONTROL);
2702 		reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2703 			 RXCHK_BRCM_TAG_MATCH_SHIFT);
2704 		for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2705 			reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2706 			i++;
2707 		}
2708 		reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2709 		rxchk_writel(priv, reg, RXCHK_CONTROL);
2710 	}
2711 
2712 	/* Make sure RBUF entered WoL mode as result */
2713 	do {
2714 		reg = rbuf_readl(priv, RBUF_STATUS);
2715 		if (reg & RBUF_WOL_MODE)
2716 			break;
2717 
2718 		udelay(10);
2719 	} while (timeout-- > 0);
2720 
2721 	/* Do not leave the UniMAC RBUF matching only MPD packets */
2722 	if (!timeout) {
2723 		mpd_enable_set(priv, false);
2724 		netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2725 		return -ETIMEDOUT;
2726 	}
2727 
2728 	/* UniMAC receive needs to be turned on */
2729 	umac_enable_set(priv, CMD_RX_EN, 1);
2730 
2731 	netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2732 
2733 	return 0;
2734 }
2735 
2736 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2737 {
2738 	struct net_device *dev = dev_get_drvdata(d);
2739 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2740 	unsigned int i;
2741 	int ret = 0;
2742 	u32 reg;
2743 
2744 	if (!netif_running(dev))
2745 		return 0;
2746 
2747 	netif_device_detach(dev);
2748 
2749 	bcm_sysport_netif_stop(dev);
2750 
2751 	phy_suspend(dev->phydev);
2752 
2753 	/* Disable UniMAC RX */
2754 	umac_enable_set(priv, CMD_RX_EN, 0);
2755 
2756 	ret = rdma_enable_set(priv, 0);
2757 	if (ret) {
2758 		netdev_err(dev, "RDMA timeout!\n");
2759 		return ret;
2760 	}
2761 
2762 	/* Disable RXCHK if enabled */
2763 	if (priv->rx_chk_en) {
2764 		reg = rxchk_readl(priv, RXCHK_CONTROL);
2765 		reg &= ~RXCHK_EN;
2766 		rxchk_writel(priv, reg, RXCHK_CONTROL);
2767 	}
2768 
2769 	/* Flush RX pipe */
2770 	if (!priv->wolopts)
2771 		topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2772 
2773 	ret = tdma_enable_set(priv, 0);
2774 	if (ret) {
2775 		netdev_err(dev, "TDMA timeout!\n");
2776 		return ret;
2777 	}
2778 
2779 	/* Wait for a packet boundary */
2780 	usleep_range(2000, 3000);
2781 
2782 	umac_enable_set(priv, CMD_TX_EN, 0);
2783 
2784 	topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2785 
2786 	/* Free RX/TX rings SW structures */
2787 	for (i = 0; i < dev->num_tx_queues; i++)
2788 		bcm_sysport_fini_tx_ring(priv, i);
2789 	bcm_sysport_fini_rx_ring(priv);
2790 
2791 	/* Get prepared for Wake-on-LAN */
2792 	if (device_may_wakeup(d) && priv->wolopts) {
2793 		clk_prepare_enable(priv->wol_clk);
2794 		ret = bcm_sysport_suspend_to_wol(priv);
2795 	}
2796 
2797 	clk_disable_unprepare(priv->clk);
2798 
2799 	return ret;
2800 }
2801 
2802 static int __maybe_unused bcm_sysport_resume(struct device *d)
2803 {
2804 	struct net_device *dev = dev_get_drvdata(d);
2805 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2806 	unsigned int i;
2807 	int ret;
2808 
2809 	if (!netif_running(dev))
2810 		return 0;
2811 
2812 	clk_prepare_enable(priv->clk);
2813 	if (priv->wolopts)
2814 		clk_disable_unprepare(priv->wol_clk);
2815 
2816 	umac_reset(priv);
2817 
2818 	/* Disable the UniMAC RX/TX */
2819 	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2820 
2821 	/* We may have been suspended and never received a WOL event that
2822 	 * would turn off MPD detection, take care of that now
2823 	 */
2824 	bcm_sysport_resume_from_wol(priv);
2825 
2826 	/* Initialize both hardware and software ring */
2827 	for (i = 0; i < dev->num_tx_queues; i++) {
2828 		ret = bcm_sysport_init_tx_ring(priv, i);
2829 		if (ret) {
2830 			netdev_err(dev, "failed to initialize TX ring %d\n",
2831 				   i);
2832 			goto out_free_tx_rings;
2833 		}
2834 	}
2835 
2836 	/* Initialize linked-list */
2837 	tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2838 
2839 	/* Initialize RX ring */
2840 	ret = bcm_sysport_init_rx_ring(priv);
2841 	if (ret) {
2842 		netdev_err(dev, "failed to initialize RX ring\n");
2843 		goto out_free_rx_ring;
2844 	}
2845 
2846 	/* RX pipe enable */
2847 	topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2848 
2849 	ret = rdma_enable_set(priv, 1);
2850 	if (ret) {
2851 		netdev_err(dev, "failed to enable RDMA\n");
2852 		goto out_free_rx_ring;
2853 	}
2854 
2855 	/* Restore enabled features */
2856 	bcm_sysport_set_features(dev, dev->features);
2857 
2858 	rbuf_init(priv);
2859 
2860 	/* Set maximum frame length */
2861 	if (!priv->is_lite)
2862 		umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2863 	else
2864 		gib_set_pad_extension(priv);
2865 
2866 	/* Set MAC address */
2867 	umac_set_hw_addr(priv, dev->dev_addr);
2868 
2869 	umac_enable_set(priv, CMD_RX_EN, 1);
2870 
2871 	/* TX pipe enable */
2872 	topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2873 
2874 	umac_enable_set(priv, CMD_TX_EN, 1);
2875 
2876 	ret = tdma_enable_set(priv, 1);
2877 	if (ret) {
2878 		netdev_err(dev, "TDMA timeout!\n");
2879 		goto out_free_rx_ring;
2880 	}
2881 
2882 	phy_resume(dev->phydev);
2883 
2884 	bcm_sysport_netif_start(dev);
2885 
2886 	netif_device_attach(dev);
2887 
2888 	return 0;
2889 
2890 out_free_rx_ring:
2891 	bcm_sysport_fini_rx_ring(priv);
2892 out_free_tx_rings:
2893 	for (i = 0; i < dev->num_tx_queues; i++)
2894 		bcm_sysport_fini_tx_ring(priv, i);
2895 	clk_disable_unprepare(priv->clk);
2896 	return ret;
2897 }
2898 
2899 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2900 		bcm_sysport_suspend, bcm_sysport_resume);
2901 
2902 static struct platform_driver bcm_sysport_driver = {
2903 	.probe	= bcm_sysport_probe,
2904 	.remove	= bcm_sysport_remove,
2905 	.driver =  {
2906 		.name = "brcm-systemport",
2907 		.of_match_table = bcm_sysport_of_match,
2908 		.pm = &bcm_sysport_pm_ops,
2909 	},
2910 };
2911 module_platform_driver(bcm_sysport_driver);
2912 
2913 MODULE_AUTHOR("Broadcom Corporation");
2914 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2915 MODULE_ALIAS("platform:brcm-systemport");
2916 MODULE_LICENSE("GPL");
2917