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/etherdevice.h>
16 #include <linux/platform_device.h>
17 #include <linux/of.h>
18 #include <linux/of_net.h>
19 #include <linux/of_mdio.h>
20 #include <linux/phy.h>
21 #include <linux/phy_fixed.h>
22 #include <net/dsa.h>
23 #include <net/ip.h>
24 #include <net/ipv6.h>
25 
26 #include "bcmsysport.h"
27 
28 /* I/O accessors register helpers */
29 #define BCM_SYSPORT_IO_MACRO(name, offset) \
30 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off)	\
31 {									\
32 	u32 reg = readl_relaxed(priv->base + offset + off);		\
33 	return reg;							\
34 }									\
35 static inline void name##_writel(struct bcm_sysport_priv *priv,		\
36 				  u32 val, u32 off)			\
37 {									\
38 	writel_relaxed(val, priv->base + offset + off);			\
39 }									\
40 
41 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
42 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
43 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
44 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
45 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
46 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
47 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
48 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
49 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
50 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
51 
52 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
53  * same layout, except it has been moved by 4 bytes up, *sigh*
54  */
55 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
56 {
57 	if (priv->is_lite && off >= RDMA_STATUS)
58 		off += 4;
59 	return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
60 }
61 
62 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
63 {
64 	if (priv->is_lite && off >= RDMA_STATUS)
65 		off += 4;
66 	writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
67 }
68 
69 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
70 {
71 	if (!priv->is_lite) {
72 		return BIT(bit);
73 	} else {
74 		if (bit >= ACB_ALGO)
75 			return BIT(bit + 1);
76 		else
77 			return BIT(bit);
78 	}
79 }
80 
81 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
82  * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
83   */
84 #define BCM_SYSPORT_INTR_L2(which)	\
85 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
86 						u32 mask)		\
87 {									\
88 	priv->irq##which##_mask &= ~(mask);				\
89 	intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);	\
90 }									\
91 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
92 						u32 mask)		\
93 {									\
94 	intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);	\
95 	priv->irq##which##_mask |= (mask);				\
96 }									\
97 
98 BCM_SYSPORT_INTR_L2(0)
99 BCM_SYSPORT_INTR_L2(1)
100 
101 /* Register accesses to GISB/RBUS registers are expensive (few hundred
102  * nanoseconds), so keep the check for 64-bits explicit here to save
103  * one register write per-packet on 32-bits platforms.
104  */
105 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
106 				     void __iomem *d,
107 				     dma_addr_t addr)
108 {
109 #ifdef CONFIG_PHYS_ADDR_T_64BIT
110 	writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
111 		     d + DESC_ADDR_HI_STATUS_LEN);
112 #endif
113 	writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
114 }
115 
116 /* Ethtool operations */
117 static void bcm_sysport_set_rx_csum(struct net_device *dev,
118 				    netdev_features_t wanted)
119 {
120 	struct bcm_sysport_priv *priv = netdev_priv(dev);
121 	u32 reg;
122 
123 	priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
124 	reg = rxchk_readl(priv, RXCHK_CONTROL);
125 	/* Clear L2 header checks, which would prevent BPDUs
126 	 * from being received.
127 	 */
128 	reg &= ~RXCHK_L2_HDR_DIS;
129 	if (priv->rx_chk_en)
130 		reg |= RXCHK_EN;
131 	else
132 		reg &= ~RXCHK_EN;
133 
134 	/* If UniMAC forwards CRC, we need to skip over it to get
135 	 * a valid CHK bit to be set in the per-packet status word
136 	 */
137 	if (priv->rx_chk_en && priv->crc_fwd)
138 		reg |= RXCHK_SKIP_FCS;
139 	else
140 		reg &= ~RXCHK_SKIP_FCS;
141 
142 	/* If Broadcom tags are enabled (e.g: using a switch), make
143 	 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
144 	 * tag after the Ethernet MAC Source Address.
145 	 */
146 	if (netdev_uses_dsa(dev))
147 		reg |= RXCHK_BRCM_TAG_EN;
148 	else
149 		reg &= ~RXCHK_BRCM_TAG_EN;
150 
151 	rxchk_writel(priv, reg, RXCHK_CONTROL);
152 }
153 
154 static void bcm_sysport_set_tx_csum(struct net_device *dev,
155 				    netdev_features_t wanted)
156 {
157 	struct bcm_sysport_priv *priv = netdev_priv(dev);
158 	u32 reg;
159 
160 	/* Hardware transmit checksum requires us to enable the Transmit status
161 	 * block prepended to the packet contents
162 	 */
163 	priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
164 				    NETIF_F_HW_VLAN_CTAG_TX));
165 	reg = tdma_readl(priv, TDMA_CONTROL);
166 	if (priv->tsb_en)
167 		reg |= tdma_control_bit(priv, TSB_EN);
168 	else
169 		reg &= ~tdma_control_bit(priv, TSB_EN);
170 	/* Indicating that software inserts Broadcom tags is needed for the TX
171 	 * checksum to be computed correctly when using VLAN HW acceleration,
172 	 * else it has no effect, so it can always be turned on.
173 	 */
174 	if (netdev_uses_dsa(dev))
175 		reg |= tdma_control_bit(priv, SW_BRCM_TAG);
176 	else
177 		reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
178 	tdma_writel(priv, reg, TDMA_CONTROL);
179 
180 	/* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
181 	if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
182 		tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
183 }
184 
185 static int bcm_sysport_set_features(struct net_device *dev,
186 				    netdev_features_t features)
187 {
188 	struct bcm_sysport_priv *priv = netdev_priv(dev);
189 
190 	/* Read CRC forward */
191 	if (!priv->is_lite)
192 		priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
193 	else
194 		priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
195 				  GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
196 
197 	bcm_sysport_set_rx_csum(dev, features);
198 	bcm_sysport_set_tx_csum(dev, features);
199 
200 	return 0;
201 }
202 
203 /* Hardware counters must be kept in sync because the order/offset
204  * is important here (order in structure declaration = order in hardware)
205  */
206 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
207 	/* general stats */
208 	STAT_NETDEV64(rx_packets),
209 	STAT_NETDEV64(tx_packets),
210 	STAT_NETDEV64(rx_bytes),
211 	STAT_NETDEV64(tx_bytes),
212 	STAT_NETDEV(rx_errors),
213 	STAT_NETDEV(tx_errors),
214 	STAT_NETDEV(rx_dropped),
215 	STAT_NETDEV(tx_dropped),
216 	STAT_NETDEV(multicast),
217 	/* UniMAC RSV counters */
218 	STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
219 	STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
220 	STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
221 	STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
222 	STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
223 	STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
224 	STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
225 	STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
226 	STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
227 	STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
228 	STAT_MIB_RX("rx_pkts", mib.rx.pkt),
229 	STAT_MIB_RX("rx_bytes", mib.rx.bytes),
230 	STAT_MIB_RX("rx_multicast", mib.rx.mca),
231 	STAT_MIB_RX("rx_broadcast", mib.rx.bca),
232 	STAT_MIB_RX("rx_fcs", mib.rx.fcs),
233 	STAT_MIB_RX("rx_control", mib.rx.cf),
234 	STAT_MIB_RX("rx_pause", mib.rx.pf),
235 	STAT_MIB_RX("rx_unknown", mib.rx.uo),
236 	STAT_MIB_RX("rx_align", mib.rx.aln),
237 	STAT_MIB_RX("rx_outrange", mib.rx.flr),
238 	STAT_MIB_RX("rx_code", mib.rx.cde),
239 	STAT_MIB_RX("rx_carrier", mib.rx.fcr),
240 	STAT_MIB_RX("rx_oversize", mib.rx.ovr),
241 	STAT_MIB_RX("rx_jabber", mib.rx.jbr),
242 	STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
243 	STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
244 	STAT_MIB_RX("rx_unicast", mib.rx.uc),
245 	STAT_MIB_RX("rx_ppp", mib.rx.ppp),
246 	STAT_MIB_RX("rx_crc", mib.rx.rcrc),
247 	/* UniMAC TSV counters */
248 	STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
249 	STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
250 	STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
251 	STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
252 	STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
253 	STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
254 	STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
255 	STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
256 	STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
257 	STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
258 	STAT_MIB_TX("tx_pkts", mib.tx.pkts),
259 	STAT_MIB_TX("tx_multicast", mib.tx.mca),
260 	STAT_MIB_TX("tx_broadcast", mib.tx.bca),
261 	STAT_MIB_TX("tx_pause", mib.tx.pf),
262 	STAT_MIB_TX("tx_control", mib.tx.cf),
263 	STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
264 	STAT_MIB_TX("tx_oversize", mib.tx.ovr),
265 	STAT_MIB_TX("tx_defer", mib.tx.drf),
266 	STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
267 	STAT_MIB_TX("tx_single_col", mib.tx.scl),
268 	STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
269 	STAT_MIB_TX("tx_late_col", mib.tx.lcl),
270 	STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
271 	STAT_MIB_TX("tx_frags", mib.tx.frg),
272 	STAT_MIB_TX("tx_total_col", mib.tx.ncl),
273 	STAT_MIB_TX("tx_jabber", mib.tx.jbr),
274 	STAT_MIB_TX("tx_bytes", mib.tx.bytes),
275 	STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
276 	STAT_MIB_TX("tx_unicast", mib.tx.uc),
277 	/* UniMAC RUNT counters */
278 	STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
279 	STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
280 	STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
281 	STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
282 	/* RXCHK misc statistics */
283 	STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
284 	STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
285 		   RXCHK_OTHER_DISC_CNTR),
286 	/* RBUF misc statistics */
287 	STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
288 	STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
289 	STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
290 	STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
291 	STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
292 	STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
293 	STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
294 	/* Per TX-queue statistics are dynamically appended */
295 };
296 
297 #define BCM_SYSPORT_STATS_LEN	ARRAY_SIZE(bcm_sysport_gstrings_stats)
298 
299 static void bcm_sysport_get_drvinfo(struct net_device *dev,
300 				    struct ethtool_drvinfo *info)
301 {
302 	strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
303 	strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
304 }
305 
306 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
307 {
308 	struct bcm_sysport_priv *priv = netdev_priv(dev);
309 
310 	return priv->msg_enable;
311 }
312 
313 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
314 {
315 	struct bcm_sysport_priv *priv = netdev_priv(dev);
316 
317 	priv->msg_enable = enable;
318 }
319 
320 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
321 {
322 	switch (type) {
323 	case BCM_SYSPORT_STAT_NETDEV:
324 	case BCM_SYSPORT_STAT_NETDEV64:
325 	case BCM_SYSPORT_STAT_RXCHK:
326 	case BCM_SYSPORT_STAT_RBUF:
327 	case BCM_SYSPORT_STAT_SOFT:
328 		return true;
329 	default:
330 		return false;
331 	}
332 }
333 
334 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
335 {
336 	struct bcm_sysport_priv *priv = netdev_priv(dev);
337 	const struct bcm_sysport_stats *s;
338 	unsigned int i, j;
339 
340 	switch (string_set) {
341 	case ETH_SS_STATS:
342 		for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
343 			s = &bcm_sysport_gstrings_stats[i];
344 			if (priv->is_lite &&
345 			    !bcm_sysport_lite_stat_valid(s->type))
346 				continue;
347 			j++;
348 		}
349 		/* Include per-queue statistics */
350 		return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
351 	default:
352 		return -EOPNOTSUPP;
353 	}
354 }
355 
356 static void bcm_sysport_get_strings(struct net_device *dev,
357 				    u32 stringset, u8 *data)
358 {
359 	struct bcm_sysport_priv *priv = netdev_priv(dev);
360 	const struct bcm_sysport_stats *s;
361 	char buf[128];
362 	int i, j;
363 
364 	switch (stringset) {
365 	case ETH_SS_STATS:
366 		for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
367 			s = &bcm_sysport_gstrings_stats[i];
368 			if (priv->is_lite &&
369 			    !bcm_sysport_lite_stat_valid(s->type))
370 				continue;
371 
372 			memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
373 			       ETH_GSTRING_LEN);
374 			j++;
375 		}
376 
377 		for (i = 0; i < dev->num_tx_queues; i++) {
378 			snprintf(buf, sizeof(buf), "txq%d_packets", i);
379 			memcpy(data + j * ETH_GSTRING_LEN, buf,
380 			       ETH_GSTRING_LEN);
381 			j++;
382 
383 			snprintf(buf, sizeof(buf), "txq%d_bytes", i);
384 			memcpy(data + j * ETH_GSTRING_LEN, buf,
385 			       ETH_GSTRING_LEN);
386 			j++;
387 		}
388 		break;
389 	default:
390 		break;
391 	}
392 }
393 
394 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
395 {
396 	int i, j = 0;
397 
398 	for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
399 		const struct bcm_sysport_stats *s;
400 		u8 offset = 0;
401 		u32 val = 0;
402 		char *p;
403 
404 		s = &bcm_sysport_gstrings_stats[i];
405 		switch (s->type) {
406 		case BCM_SYSPORT_STAT_NETDEV:
407 		case BCM_SYSPORT_STAT_NETDEV64:
408 		case BCM_SYSPORT_STAT_SOFT:
409 			continue;
410 		case BCM_SYSPORT_STAT_MIB_RX:
411 		case BCM_SYSPORT_STAT_MIB_TX:
412 		case BCM_SYSPORT_STAT_RUNT:
413 			if (priv->is_lite)
414 				continue;
415 
416 			if (s->type != BCM_SYSPORT_STAT_MIB_RX)
417 				offset = UMAC_MIB_STAT_OFFSET;
418 			val = umac_readl(priv, UMAC_MIB_START + j + offset);
419 			break;
420 		case BCM_SYSPORT_STAT_RXCHK:
421 			val = rxchk_readl(priv, s->reg_offset);
422 			if (val == ~0)
423 				rxchk_writel(priv, 0, s->reg_offset);
424 			break;
425 		case BCM_SYSPORT_STAT_RBUF:
426 			val = rbuf_readl(priv, s->reg_offset);
427 			if (val == ~0)
428 				rbuf_writel(priv, 0, s->reg_offset);
429 			break;
430 		}
431 
432 		j += s->stat_sizeof;
433 		p = (char *)priv + s->stat_offset;
434 		*(u32 *)p = val;
435 	}
436 
437 	netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
438 }
439 
440 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
441 					u64 *tx_bytes, u64 *tx_packets)
442 {
443 	struct bcm_sysport_tx_ring *ring;
444 	u64 bytes = 0, packets = 0;
445 	unsigned int start;
446 	unsigned int q;
447 
448 	for (q = 0; q < priv->netdev->num_tx_queues; q++) {
449 		ring = &priv->tx_rings[q];
450 		do {
451 			start = u64_stats_fetch_begin_irq(&priv->syncp);
452 			bytes = ring->bytes;
453 			packets = ring->packets;
454 		} while (u64_stats_fetch_retry_irq(&priv->syncp, start));
455 
456 		*tx_bytes += bytes;
457 		*tx_packets += packets;
458 	}
459 }
460 
461 static void bcm_sysport_get_stats(struct net_device *dev,
462 				  struct ethtool_stats *stats, u64 *data)
463 {
464 	struct bcm_sysport_priv *priv = netdev_priv(dev);
465 	struct bcm_sysport_stats64 *stats64 = &priv->stats64;
466 	struct u64_stats_sync *syncp = &priv->syncp;
467 	struct bcm_sysport_tx_ring *ring;
468 	u64 tx_bytes = 0, tx_packets = 0;
469 	unsigned int start;
470 	int i, j;
471 
472 	if (netif_running(dev)) {
473 		bcm_sysport_update_mib_counters(priv);
474 		bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
475 		stats64->tx_bytes = tx_bytes;
476 		stats64->tx_packets = tx_packets;
477 	}
478 
479 	for (i =  0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
480 		const struct bcm_sysport_stats *s;
481 		char *p;
482 
483 		s = &bcm_sysport_gstrings_stats[i];
484 		if (s->type == BCM_SYSPORT_STAT_NETDEV)
485 			p = (char *)&dev->stats;
486 		else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
487 			p = (char *)stats64;
488 		else
489 			p = (char *)priv;
490 
491 		if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
492 			continue;
493 		p += s->stat_offset;
494 
495 		if (s->stat_sizeof == sizeof(u64) &&
496 		    s->type == BCM_SYSPORT_STAT_NETDEV64) {
497 			do {
498 				start = u64_stats_fetch_begin_irq(syncp);
499 				data[i] = *(u64 *)p;
500 			} while (u64_stats_fetch_retry_irq(syncp, start));
501 		} else
502 			data[i] = *(u32 *)p;
503 		j++;
504 	}
505 
506 	/* For SYSTEMPORT Lite since we have holes in our statistics, j would
507 	 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
508 	 * needs to point to how many total statistics we have minus the
509 	 * number of per TX queue statistics
510 	 */
511 	j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
512 	    dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
513 
514 	for (i = 0; i < dev->num_tx_queues; i++) {
515 		ring = &priv->tx_rings[i];
516 		data[j] = ring->packets;
517 		j++;
518 		data[j] = ring->bytes;
519 		j++;
520 	}
521 }
522 
523 static void bcm_sysport_get_wol(struct net_device *dev,
524 				struct ethtool_wolinfo *wol)
525 {
526 	struct bcm_sysport_priv *priv = netdev_priv(dev);
527 
528 	wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
529 	wol->wolopts = priv->wolopts;
530 
531 	if (!(priv->wolopts & WAKE_MAGICSECURE))
532 		return;
533 
534 	memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
535 }
536 
537 static int bcm_sysport_set_wol(struct net_device *dev,
538 			       struct ethtool_wolinfo *wol)
539 {
540 	struct bcm_sysport_priv *priv = netdev_priv(dev);
541 	struct device *kdev = &priv->pdev->dev;
542 	u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
543 
544 	if (!device_can_wakeup(kdev))
545 		return -ENOTSUPP;
546 
547 	if (wol->wolopts & ~supported)
548 		return -EINVAL;
549 
550 	if (wol->wolopts & WAKE_MAGICSECURE)
551 		memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
552 
553 	/* Flag the device and relevant IRQ as wakeup capable */
554 	if (wol->wolopts) {
555 		device_set_wakeup_enable(kdev, 1);
556 		if (priv->wol_irq_disabled)
557 			enable_irq_wake(priv->wol_irq);
558 		priv->wol_irq_disabled = 0;
559 	} else {
560 		device_set_wakeup_enable(kdev, 0);
561 		/* Avoid unbalanced disable_irq_wake calls */
562 		if (!priv->wol_irq_disabled)
563 			disable_irq_wake(priv->wol_irq);
564 		priv->wol_irq_disabled = 1;
565 	}
566 
567 	priv->wolopts = wol->wolopts;
568 
569 	return 0;
570 }
571 
572 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
573 					u32 usecs, u32 pkts)
574 {
575 	u32 reg;
576 
577 	reg = rdma_readl(priv, RDMA_MBDONE_INTR);
578 	reg &= ~(RDMA_INTR_THRESH_MASK |
579 		 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
580 	reg |= pkts;
581 	reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
582 	rdma_writel(priv, reg, RDMA_MBDONE_INTR);
583 }
584 
585 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
586 					struct ethtool_coalesce *ec)
587 {
588 	struct bcm_sysport_priv *priv = ring->priv;
589 	u32 reg;
590 
591 	reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
592 	reg &= ~(RING_INTR_THRESH_MASK |
593 		 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
594 	reg |= ec->tx_max_coalesced_frames;
595 	reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
596 			    RING_TIMEOUT_SHIFT;
597 	tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
598 }
599 
600 static int bcm_sysport_get_coalesce(struct net_device *dev,
601 				    struct ethtool_coalesce *ec)
602 {
603 	struct bcm_sysport_priv *priv = netdev_priv(dev);
604 	u32 reg;
605 
606 	reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
607 
608 	ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
609 	ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
610 
611 	reg = rdma_readl(priv, RDMA_MBDONE_INTR);
612 
613 	ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
614 	ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
615 	ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
616 
617 	return 0;
618 }
619 
620 static int bcm_sysport_set_coalesce(struct net_device *dev,
621 				    struct ethtool_coalesce *ec)
622 {
623 	struct bcm_sysport_priv *priv = netdev_priv(dev);
624 	struct dim_cq_moder moder;
625 	u32 usecs, pkts;
626 	unsigned int i;
627 
628 	/* Base system clock is 125Mhz, DMA timeout is this reference clock
629 	 * divided by 1024, which yield roughly 8.192 us, our maximum value has
630 	 * to fit in the RING_TIMEOUT_MASK (16 bits).
631 	 */
632 	if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
633 	    ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
634 	    ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
635 	    ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
636 		return -EINVAL;
637 
638 	if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
639 	    (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
640 		return -EINVAL;
641 
642 	for (i = 0; i < dev->num_tx_queues; i++)
643 		bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
644 
645 	priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
646 	priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
647 	usecs = priv->rx_coalesce_usecs;
648 	pkts = priv->rx_max_coalesced_frames;
649 
650 	if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
651 		moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
652 		usecs = moder.usec;
653 		pkts = moder.pkts;
654 	}
655 
656 	priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
657 
658 	/* Apply desired coalescing parameters */
659 	bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
660 
661 	return 0;
662 }
663 
664 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
665 {
666 	dev_consume_skb_any(cb->skb);
667 	cb->skb = NULL;
668 	dma_unmap_addr_set(cb, dma_addr, 0);
669 }
670 
671 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
672 					     struct bcm_sysport_cb *cb)
673 {
674 	struct device *kdev = &priv->pdev->dev;
675 	struct net_device *ndev = priv->netdev;
676 	struct sk_buff *skb, *rx_skb;
677 	dma_addr_t mapping;
678 
679 	/* Allocate a new SKB for a new packet */
680 	skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
681 				 GFP_ATOMIC | __GFP_NOWARN);
682 	if (!skb) {
683 		priv->mib.alloc_rx_buff_failed++;
684 		netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
685 		return NULL;
686 	}
687 
688 	mapping = dma_map_single(kdev, skb->data,
689 				 RX_BUF_LENGTH, DMA_FROM_DEVICE);
690 	if (dma_mapping_error(kdev, mapping)) {
691 		priv->mib.rx_dma_failed++;
692 		dev_kfree_skb_any(skb);
693 		netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
694 		return NULL;
695 	}
696 
697 	/* Grab the current SKB on the ring */
698 	rx_skb = cb->skb;
699 	if (likely(rx_skb))
700 		dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
701 				 RX_BUF_LENGTH, DMA_FROM_DEVICE);
702 
703 	/* Put the new SKB on the ring */
704 	cb->skb = skb;
705 	dma_unmap_addr_set(cb, dma_addr, mapping);
706 	dma_desc_set_addr(priv, cb->bd_addr, mapping);
707 
708 	netif_dbg(priv, rx_status, ndev, "RX refill\n");
709 
710 	/* Return the current SKB to the caller */
711 	return rx_skb;
712 }
713 
714 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
715 {
716 	struct bcm_sysport_cb *cb;
717 	struct sk_buff *skb;
718 	unsigned int i;
719 
720 	for (i = 0; i < priv->num_rx_bds; i++) {
721 		cb = &priv->rx_cbs[i];
722 		skb = bcm_sysport_rx_refill(priv, cb);
723 		dev_kfree_skb(skb);
724 		if (!cb->skb)
725 			return -ENOMEM;
726 	}
727 
728 	return 0;
729 }
730 
731 /* Poll the hardware for up to budget packets to process */
732 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
733 					unsigned int budget)
734 {
735 	struct bcm_sysport_stats64 *stats64 = &priv->stats64;
736 	struct net_device *ndev = priv->netdev;
737 	unsigned int processed = 0, to_process;
738 	unsigned int processed_bytes = 0;
739 	struct bcm_sysport_cb *cb;
740 	struct sk_buff *skb;
741 	unsigned int p_index;
742 	u16 len, status;
743 	struct bcm_rsb *rsb;
744 
745 	/* Clear status before servicing to reduce spurious interrupts */
746 	intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
747 
748 	/* Determine how much we should process since last call, SYSTEMPORT Lite
749 	 * groups the producer and consumer indexes into the same 32-bit
750 	 * which we access using RDMA_CONS_INDEX
751 	 */
752 	if (!priv->is_lite)
753 		p_index = rdma_readl(priv, RDMA_PROD_INDEX);
754 	else
755 		p_index = rdma_readl(priv, RDMA_CONS_INDEX);
756 	p_index &= RDMA_PROD_INDEX_MASK;
757 
758 	to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
759 
760 	netif_dbg(priv, rx_status, ndev,
761 		  "p_index=%d rx_c_index=%d to_process=%d\n",
762 		  p_index, priv->rx_c_index, to_process);
763 
764 	while ((processed < to_process) && (processed < budget)) {
765 		cb = &priv->rx_cbs[priv->rx_read_ptr];
766 		skb = bcm_sysport_rx_refill(priv, cb);
767 
768 
769 		/* We do not have a backing SKB, so we do not a corresponding
770 		 * DMA mapping for this incoming packet since
771 		 * bcm_sysport_rx_refill always either has both skb and mapping
772 		 * or none.
773 		 */
774 		if (unlikely(!skb)) {
775 			netif_err(priv, rx_err, ndev, "out of memory!\n");
776 			ndev->stats.rx_dropped++;
777 			ndev->stats.rx_errors++;
778 			goto next;
779 		}
780 
781 		/* Extract the Receive Status Block prepended */
782 		rsb = (struct bcm_rsb *)skb->data;
783 		len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
784 		status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
785 			  DESC_STATUS_MASK;
786 
787 		netif_dbg(priv, rx_status, ndev,
788 			  "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
789 			  p_index, priv->rx_c_index, priv->rx_read_ptr,
790 			  len, status);
791 
792 		if (unlikely(len > RX_BUF_LENGTH)) {
793 			netif_err(priv, rx_status, ndev, "oversized packet\n");
794 			ndev->stats.rx_length_errors++;
795 			ndev->stats.rx_errors++;
796 			dev_kfree_skb_any(skb);
797 			goto next;
798 		}
799 
800 		if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
801 			netif_err(priv, rx_status, ndev, "fragmented packet!\n");
802 			ndev->stats.rx_dropped++;
803 			ndev->stats.rx_errors++;
804 			dev_kfree_skb_any(skb);
805 			goto next;
806 		}
807 
808 		if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
809 			netif_err(priv, rx_err, ndev, "error packet\n");
810 			if (status & RX_STATUS_OVFLOW)
811 				ndev->stats.rx_over_errors++;
812 			ndev->stats.rx_dropped++;
813 			ndev->stats.rx_errors++;
814 			dev_kfree_skb_any(skb);
815 			goto next;
816 		}
817 
818 		skb_put(skb, len);
819 
820 		/* Hardware validated our checksum */
821 		if (likely(status & DESC_L4_CSUM))
822 			skb->ip_summed = CHECKSUM_UNNECESSARY;
823 
824 		/* Hardware pre-pends packets with 2bytes before Ethernet
825 		 * header plus we have the Receive Status Block, strip off all
826 		 * of this from the SKB.
827 		 */
828 		skb_pull(skb, sizeof(*rsb) + 2);
829 		len -= (sizeof(*rsb) + 2);
830 		processed_bytes += len;
831 
832 		/* UniMAC may forward CRC */
833 		if (priv->crc_fwd) {
834 			skb_trim(skb, len - ETH_FCS_LEN);
835 			len -= ETH_FCS_LEN;
836 		}
837 
838 		skb->protocol = eth_type_trans(skb, ndev);
839 		ndev->stats.rx_packets++;
840 		ndev->stats.rx_bytes += len;
841 		u64_stats_update_begin(&priv->syncp);
842 		stats64->rx_packets++;
843 		stats64->rx_bytes += len;
844 		u64_stats_update_end(&priv->syncp);
845 
846 		napi_gro_receive(&priv->napi, skb);
847 next:
848 		processed++;
849 		priv->rx_read_ptr++;
850 
851 		if (priv->rx_read_ptr == priv->num_rx_bds)
852 			priv->rx_read_ptr = 0;
853 	}
854 
855 	priv->dim.packets = processed;
856 	priv->dim.bytes = processed_bytes;
857 
858 	return processed;
859 }
860 
861 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
862 				       struct bcm_sysport_cb *cb,
863 				       unsigned int *bytes_compl,
864 				       unsigned int *pkts_compl)
865 {
866 	struct bcm_sysport_priv *priv = ring->priv;
867 	struct device *kdev = &priv->pdev->dev;
868 
869 	if (cb->skb) {
870 		*bytes_compl += cb->skb->len;
871 		dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
872 				 dma_unmap_len(cb, dma_len),
873 				 DMA_TO_DEVICE);
874 		(*pkts_compl)++;
875 		bcm_sysport_free_cb(cb);
876 	/* SKB fragment */
877 	} else if (dma_unmap_addr(cb, dma_addr)) {
878 		*bytes_compl += dma_unmap_len(cb, dma_len);
879 		dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
880 			       dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
881 		dma_unmap_addr_set(cb, dma_addr, 0);
882 	}
883 }
884 
885 /* Reclaim queued SKBs for transmission completion, lockless version */
886 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
887 					     struct bcm_sysport_tx_ring *ring)
888 {
889 	unsigned int pkts_compl = 0, bytes_compl = 0;
890 	struct net_device *ndev = priv->netdev;
891 	unsigned int txbds_processed = 0;
892 	struct bcm_sysport_cb *cb;
893 	unsigned int txbds_ready;
894 	unsigned int c_index;
895 	u32 hw_ind;
896 
897 	/* Clear status before servicing to reduce spurious interrupts */
898 	if (!ring->priv->is_lite)
899 		intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
900 	else
901 		intrl2_0_writel(ring->priv, BIT(ring->index +
902 				INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
903 
904 	/* Compute how many descriptors have been processed since last call */
905 	hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
906 	c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
907 	txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
908 
909 	netif_dbg(priv, tx_done, ndev,
910 		  "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
911 		  ring->index, ring->c_index, c_index, txbds_ready);
912 
913 	while (txbds_processed < txbds_ready) {
914 		cb = &ring->cbs[ring->clean_index];
915 		bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
916 
917 		ring->desc_count++;
918 		txbds_processed++;
919 
920 		if (likely(ring->clean_index < ring->size - 1))
921 			ring->clean_index++;
922 		else
923 			ring->clean_index = 0;
924 	}
925 
926 	u64_stats_update_begin(&priv->syncp);
927 	ring->packets += pkts_compl;
928 	ring->bytes += bytes_compl;
929 	u64_stats_update_end(&priv->syncp);
930 
931 	ring->c_index = c_index;
932 
933 	netif_dbg(priv, tx_done, ndev,
934 		  "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
935 		  ring->index, ring->c_index, pkts_compl, bytes_compl);
936 
937 	return pkts_compl;
938 }
939 
940 /* Locked version of the per-ring TX reclaim routine */
941 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
942 					   struct bcm_sysport_tx_ring *ring)
943 {
944 	struct netdev_queue *txq;
945 	unsigned int released;
946 	unsigned long flags;
947 
948 	txq = netdev_get_tx_queue(priv->netdev, ring->index);
949 
950 	spin_lock_irqsave(&ring->lock, flags);
951 	released = __bcm_sysport_tx_reclaim(priv, ring);
952 	if (released)
953 		netif_tx_wake_queue(txq);
954 
955 	spin_unlock_irqrestore(&ring->lock, flags);
956 
957 	return released;
958 }
959 
960 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
961 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
962 				 struct bcm_sysport_tx_ring *ring)
963 {
964 	unsigned long flags;
965 
966 	spin_lock_irqsave(&ring->lock, flags);
967 	__bcm_sysport_tx_reclaim(priv, ring);
968 	spin_unlock_irqrestore(&ring->lock, flags);
969 }
970 
971 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
972 {
973 	struct bcm_sysport_tx_ring *ring =
974 		container_of(napi, struct bcm_sysport_tx_ring, napi);
975 	unsigned int work_done = 0;
976 
977 	work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
978 
979 	if (work_done == 0) {
980 		napi_complete(napi);
981 		/* re-enable TX interrupt */
982 		if (!ring->priv->is_lite)
983 			intrl2_1_mask_clear(ring->priv, BIT(ring->index));
984 		else
985 			intrl2_0_mask_clear(ring->priv, BIT(ring->index +
986 					    INTRL2_0_TDMA_MBDONE_SHIFT));
987 
988 		return 0;
989 	}
990 
991 	return budget;
992 }
993 
994 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
995 {
996 	unsigned int q;
997 
998 	for (q = 0; q < priv->netdev->num_tx_queues; q++)
999 		bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
1000 }
1001 
1002 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1003 {
1004 	struct bcm_sysport_priv *priv =
1005 		container_of(napi, struct bcm_sysport_priv, napi);
1006 	struct dim_sample dim_sample = {};
1007 	unsigned int work_done = 0;
1008 
1009 	work_done = bcm_sysport_desc_rx(priv, budget);
1010 
1011 	priv->rx_c_index += work_done;
1012 	priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1013 
1014 	/* SYSTEMPORT Lite groups the producer/consumer index, producer is
1015 	 * maintained by HW, but writes to it will be ignore while RDMA
1016 	 * is active
1017 	 */
1018 	if (!priv->is_lite)
1019 		rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1020 	else
1021 		rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1022 
1023 	if (work_done < budget) {
1024 		napi_complete_done(napi, work_done);
1025 		/* re-enable RX interrupts */
1026 		intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1027 	}
1028 
1029 	if (priv->dim.use_dim) {
1030 		dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1031 				  priv->dim.bytes, &dim_sample);
1032 		net_dim(&priv->dim.dim, dim_sample);
1033 	}
1034 
1035 	return work_done;
1036 }
1037 
1038 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1039 {
1040 	u32 reg, bit;
1041 
1042 	reg = umac_readl(priv, UMAC_MPD_CTRL);
1043 	if (enable)
1044 		reg |= MPD_EN;
1045 	else
1046 		reg &= ~MPD_EN;
1047 	umac_writel(priv, reg, UMAC_MPD_CTRL);
1048 
1049 	if (priv->is_lite)
1050 		bit = RBUF_ACPI_EN_LITE;
1051 	else
1052 		bit = RBUF_ACPI_EN;
1053 
1054 	reg = rbuf_readl(priv, RBUF_CONTROL);
1055 	if (enable)
1056 		reg |= bit;
1057 	else
1058 		reg &= ~bit;
1059 	rbuf_writel(priv, reg, RBUF_CONTROL);
1060 }
1061 
1062 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1063 {
1064 	unsigned int index;
1065 	u32 reg;
1066 
1067 	/* Disable RXCHK, active filters and Broadcom tag matching */
1068 	reg = rxchk_readl(priv, RXCHK_CONTROL);
1069 	reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1070 		 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1071 	rxchk_writel(priv, reg, RXCHK_CONTROL);
1072 
1073 	/* Make sure we restore correct CID index in case HW lost
1074 	 * its context during deep idle state
1075 	 */
1076 	for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1077 		rxchk_writel(priv, priv->filters_loc[index] <<
1078 			     RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1079 		rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1080 	}
1081 
1082 	/* Clear the MagicPacket detection logic */
1083 	mpd_enable_set(priv, false);
1084 
1085 	reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1086 	if (reg & INTRL2_0_MPD)
1087 		netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1088 
1089 	if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1090 		reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1091 				  RXCHK_BRCM_TAG_MATCH_MASK;
1092 		netdev_info(priv->netdev,
1093 			    "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1094 	}
1095 
1096 	netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1097 }
1098 
1099 static void bcm_sysport_dim_work(struct work_struct *work)
1100 {
1101 	struct dim *dim = container_of(work, struct dim, work);
1102 	struct bcm_sysport_net_dim *ndim =
1103 			container_of(dim, struct bcm_sysport_net_dim, dim);
1104 	struct bcm_sysport_priv *priv =
1105 			container_of(ndim, struct bcm_sysport_priv, dim);
1106 	struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1107 								    dim->profile_ix);
1108 
1109 	bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1110 	dim->state = DIM_START_MEASURE;
1111 }
1112 
1113 /* RX and misc interrupt routine */
1114 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1115 {
1116 	struct net_device *dev = dev_id;
1117 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1118 	struct bcm_sysport_tx_ring *txr;
1119 	unsigned int ring, ring_bit;
1120 
1121 	priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1122 			  ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1123 	intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1124 
1125 	if (unlikely(priv->irq0_stat == 0)) {
1126 		netdev_warn(priv->netdev, "spurious RX interrupt\n");
1127 		return IRQ_NONE;
1128 	}
1129 
1130 	if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1131 		priv->dim.event_ctr++;
1132 		if (likely(napi_schedule_prep(&priv->napi))) {
1133 			/* disable RX interrupts */
1134 			intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1135 			__napi_schedule_irqoff(&priv->napi);
1136 		}
1137 	}
1138 
1139 	/* TX ring is full, perform a full reclaim since we do not know
1140 	 * which one would trigger this interrupt
1141 	 */
1142 	if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1143 		bcm_sysport_tx_reclaim_all(priv);
1144 
1145 	if (!priv->is_lite)
1146 		goto out;
1147 
1148 	for (ring = 0; ring < dev->num_tx_queues; ring++) {
1149 		ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1150 		if (!(priv->irq0_stat & ring_bit))
1151 			continue;
1152 
1153 		txr = &priv->tx_rings[ring];
1154 
1155 		if (likely(napi_schedule_prep(&txr->napi))) {
1156 			intrl2_0_mask_set(priv, ring_bit);
1157 			__napi_schedule(&txr->napi);
1158 		}
1159 	}
1160 out:
1161 	return IRQ_HANDLED;
1162 }
1163 
1164 /* TX interrupt service routine */
1165 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1166 {
1167 	struct net_device *dev = dev_id;
1168 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1169 	struct bcm_sysport_tx_ring *txr;
1170 	unsigned int ring;
1171 
1172 	priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1173 				~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1174 	intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1175 
1176 	if (unlikely(priv->irq1_stat == 0)) {
1177 		netdev_warn(priv->netdev, "spurious TX interrupt\n");
1178 		return IRQ_NONE;
1179 	}
1180 
1181 	for (ring = 0; ring < dev->num_tx_queues; ring++) {
1182 		if (!(priv->irq1_stat & BIT(ring)))
1183 			continue;
1184 
1185 		txr = &priv->tx_rings[ring];
1186 
1187 		if (likely(napi_schedule_prep(&txr->napi))) {
1188 			intrl2_1_mask_set(priv, BIT(ring));
1189 			__napi_schedule_irqoff(&txr->napi);
1190 		}
1191 	}
1192 
1193 	return IRQ_HANDLED;
1194 }
1195 
1196 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1197 {
1198 	struct bcm_sysport_priv *priv = dev_id;
1199 
1200 	pm_wakeup_event(&priv->pdev->dev, 0);
1201 
1202 	return IRQ_HANDLED;
1203 }
1204 
1205 #ifdef CONFIG_NET_POLL_CONTROLLER
1206 static void bcm_sysport_poll_controller(struct net_device *dev)
1207 {
1208 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1209 
1210 	disable_irq(priv->irq0);
1211 	bcm_sysport_rx_isr(priv->irq0, priv);
1212 	enable_irq(priv->irq0);
1213 
1214 	if (!priv->is_lite) {
1215 		disable_irq(priv->irq1);
1216 		bcm_sysport_tx_isr(priv->irq1, priv);
1217 		enable_irq(priv->irq1);
1218 	}
1219 }
1220 #endif
1221 
1222 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1223 					      struct net_device *dev)
1224 {
1225 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1226 	struct sk_buff *nskb;
1227 	struct bcm_tsb *tsb;
1228 	u32 csum_info;
1229 	u8 ip_proto;
1230 	u16 csum_start;
1231 	__be16 ip_ver;
1232 
1233 	/* Re-allocate SKB if needed */
1234 	if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1235 		nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1236 		if (!nskb) {
1237 			dev_kfree_skb_any(skb);
1238 			priv->mib.tx_realloc_tsb_failed++;
1239 			dev->stats.tx_errors++;
1240 			dev->stats.tx_dropped++;
1241 			return NULL;
1242 		}
1243 		dev_consume_skb_any(skb);
1244 		skb = nskb;
1245 		priv->mib.tx_realloc_tsb++;
1246 	}
1247 
1248 	tsb = skb_push(skb, sizeof(*tsb));
1249 	/* Zero-out TSB by default */
1250 	memset(tsb, 0, sizeof(*tsb));
1251 
1252 	if (skb_vlan_tag_present(skb)) {
1253 		tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1254 		tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1255 	}
1256 
1257 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
1258 		ip_ver = skb->protocol;
1259 		switch (ip_ver) {
1260 		case htons(ETH_P_IP):
1261 			ip_proto = ip_hdr(skb)->protocol;
1262 			break;
1263 		case htons(ETH_P_IPV6):
1264 			ip_proto = ipv6_hdr(skb)->nexthdr;
1265 			break;
1266 		default:
1267 			return skb;
1268 		}
1269 
1270 		/* Get the checksum offset and the L4 (transport) offset */
1271 		csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1272 		/* Account for the HW inserted VLAN tag */
1273 		if (skb_vlan_tag_present(skb))
1274 			csum_start += VLAN_HLEN;
1275 		csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1276 		csum_info |= (csum_start << L4_PTR_SHIFT);
1277 
1278 		if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1279 			csum_info |= L4_LENGTH_VALID;
1280 			if (ip_proto == IPPROTO_UDP &&
1281 			    ip_ver == htons(ETH_P_IP))
1282 				csum_info |= L4_UDP;
1283 		} else {
1284 			csum_info = 0;
1285 		}
1286 
1287 		tsb->l4_ptr_dest_map = csum_info;
1288 	}
1289 
1290 	return skb;
1291 }
1292 
1293 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1294 				    struct net_device *dev)
1295 {
1296 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1297 	struct device *kdev = &priv->pdev->dev;
1298 	struct bcm_sysport_tx_ring *ring;
1299 	struct bcm_sysport_cb *cb;
1300 	struct netdev_queue *txq;
1301 	u32 len_status, addr_lo;
1302 	unsigned int skb_len;
1303 	unsigned long flags;
1304 	dma_addr_t mapping;
1305 	u16 queue;
1306 	int ret;
1307 
1308 	queue = skb_get_queue_mapping(skb);
1309 	txq = netdev_get_tx_queue(dev, queue);
1310 	ring = &priv->tx_rings[queue];
1311 
1312 	/* lock against tx reclaim in BH context and TX ring full interrupt */
1313 	spin_lock_irqsave(&ring->lock, flags);
1314 	if (unlikely(ring->desc_count == 0)) {
1315 		netif_tx_stop_queue(txq);
1316 		netdev_err(dev, "queue %d awake and ring full!\n", queue);
1317 		ret = NETDEV_TX_BUSY;
1318 		goto out;
1319 	}
1320 
1321 	/* Insert TSB and checksum infos */
1322 	if (priv->tsb_en) {
1323 		skb = bcm_sysport_insert_tsb(skb, dev);
1324 		if (!skb) {
1325 			ret = NETDEV_TX_OK;
1326 			goto out;
1327 		}
1328 	}
1329 
1330 	skb_len = skb->len;
1331 
1332 	mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1333 	if (dma_mapping_error(kdev, mapping)) {
1334 		priv->mib.tx_dma_failed++;
1335 		netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1336 			  skb->data, skb_len);
1337 		ret = NETDEV_TX_OK;
1338 		goto out;
1339 	}
1340 
1341 	/* Remember the SKB for future freeing */
1342 	cb = &ring->cbs[ring->curr_desc];
1343 	cb->skb = skb;
1344 	dma_unmap_addr_set(cb, dma_addr, mapping);
1345 	dma_unmap_len_set(cb, dma_len, skb_len);
1346 
1347 	addr_lo = lower_32_bits(mapping);
1348 	len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1349 	len_status |= (skb_len << DESC_LEN_SHIFT);
1350 	len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1351 		       DESC_STATUS_SHIFT;
1352 	if (skb->ip_summed == CHECKSUM_PARTIAL)
1353 		len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1354 	if (skb_vlan_tag_present(skb))
1355 		len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1356 
1357 	ring->curr_desc++;
1358 	if (ring->curr_desc == ring->size)
1359 		ring->curr_desc = 0;
1360 	ring->desc_count--;
1361 
1362 	/* Ports are latched, so write upper address first */
1363 	tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1364 	tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1365 
1366 	/* Check ring space and update SW control flow */
1367 	if (ring->desc_count == 0)
1368 		netif_tx_stop_queue(txq);
1369 
1370 	netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1371 		  ring->index, ring->desc_count, ring->curr_desc);
1372 
1373 	ret = NETDEV_TX_OK;
1374 out:
1375 	spin_unlock_irqrestore(&ring->lock, flags);
1376 	return ret;
1377 }
1378 
1379 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1380 {
1381 	netdev_warn(dev, "transmit timeout!\n");
1382 
1383 	netif_trans_update(dev);
1384 	dev->stats.tx_errors++;
1385 
1386 	netif_tx_wake_all_queues(dev);
1387 }
1388 
1389 /* phylib adjust link callback */
1390 static void bcm_sysport_adj_link(struct net_device *dev)
1391 {
1392 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1393 	struct phy_device *phydev = dev->phydev;
1394 	unsigned int changed = 0;
1395 	u32 cmd_bits = 0, reg;
1396 
1397 	if (priv->old_link != phydev->link) {
1398 		changed = 1;
1399 		priv->old_link = phydev->link;
1400 	}
1401 
1402 	if (priv->old_duplex != phydev->duplex) {
1403 		changed = 1;
1404 		priv->old_duplex = phydev->duplex;
1405 	}
1406 
1407 	if (priv->is_lite)
1408 		goto out;
1409 
1410 	switch (phydev->speed) {
1411 	case SPEED_2500:
1412 		cmd_bits = CMD_SPEED_2500;
1413 		break;
1414 	case SPEED_1000:
1415 		cmd_bits = CMD_SPEED_1000;
1416 		break;
1417 	case SPEED_100:
1418 		cmd_bits = CMD_SPEED_100;
1419 		break;
1420 	case SPEED_10:
1421 		cmd_bits = CMD_SPEED_10;
1422 		break;
1423 	default:
1424 		break;
1425 	}
1426 	cmd_bits <<= CMD_SPEED_SHIFT;
1427 
1428 	if (phydev->duplex == DUPLEX_HALF)
1429 		cmd_bits |= CMD_HD_EN;
1430 
1431 	if (priv->old_pause != phydev->pause) {
1432 		changed = 1;
1433 		priv->old_pause = phydev->pause;
1434 	}
1435 
1436 	if (!phydev->pause)
1437 		cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1438 
1439 	if (!changed)
1440 		return;
1441 
1442 	if (phydev->link) {
1443 		reg = umac_readl(priv, UMAC_CMD);
1444 		reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1445 			CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1446 			CMD_TX_PAUSE_IGNORE);
1447 		reg |= cmd_bits;
1448 		umac_writel(priv, reg, UMAC_CMD);
1449 	}
1450 out:
1451 	if (changed)
1452 		phy_print_status(phydev);
1453 }
1454 
1455 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1456 				 void (*cb)(struct work_struct *work))
1457 {
1458 	struct bcm_sysport_net_dim *dim = &priv->dim;
1459 
1460 	INIT_WORK(&dim->dim.work, cb);
1461 	dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1462 	dim->event_ctr = 0;
1463 	dim->packets = 0;
1464 	dim->bytes = 0;
1465 }
1466 
1467 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1468 {
1469 	struct bcm_sysport_net_dim *dim = &priv->dim;
1470 	struct dim_cq_moder moder;
1471 	u32 usecs, pkts;
1472 
1473 	usecs = priv->rx_coalesce_usecs;
1474 	pkts = priv->rx_max_coalesced_frames;
1475 
1476 	/* If DIM was enabled, re-apply default parameters */
1477 	if (dim->use_dim) {
1478 		moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1479 		usecs = moder.usec;
1480 		pkts = moder.pkts;
1481 	}
1482 
1483 	bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1484 }
1485 
1486 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1487 				    unsigned int index)
1488 {
1489 	struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1490 	size_t size;
1491 	u32 reg;
1492 
1493 	/* Simple descriptors partitioning for now */
1494 	size = 256;
1495 
1496 	ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1497 	if (!ring->cbs) {
1498 		netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1499 		return -ENOMEM;
1500 	}
1501 
1502 	/* Initialize SW view of the ring */
1503 	spin_lock_init(&ring->lock);
1504 	ring->priv = priv;
1505 	netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1506 	ring->index = index;
1507 	ring->size = size;
1508 	ring->clean_index = 0;
1509 	ring->alloc_size = ring->size;
1510 	ring->desc_count = ring->size;
1511 	ring->curr_desc = 0;
1512 
1513 	/* Initialize HW ring */
1514 	tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1515 	tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1516 	tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1517 	tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1518 
1519 	/* Configure QID and port mapping */
1520 	reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1521 	reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1522 	if (ring->inspect) {
1523 		reg |= ring->switch_queue & RING_QID_MASK;
1524 		reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1525 	} else {
1526 		reg |= RING_IGNORE_STATUS;
1527 	}
1528 	tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1529 	reg = 0;
1530 	/* Adjust the packet size calculations if SYSTEMPORT is responsible
1531 	 * for HW insertion of VLAN tags
1532 	 */
1533 	if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1534 		reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1535 	tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1536 
1537 	/* Enable ACB algorithm 2 */
1538 	reg = tdma_readl(priv, TDMA_CONTROL);
1539 	reg |= tdma_control_bit(priv, ACB_ALGO);
1540 	tdma_writel(priv, reg, TDMA_CONTROL);
1541 
1542 	/* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1543 	 * with the original definition of ACB_ALGO
1544 	 */
1545 	reg = tdma_readl(priv, TDMA_CONTROL);
1546 	if (priv->is_lite)
1547 		reg &= ~BIT(TSB_SWAP1);
1548 	/* Set a correct TSB format based on host endian */
1549 	if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1550 		reg |= tdma_control_bit(priv, TSB_SWAP0);
1551 	else
1552 		reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1553 	tdma_writel(priv, reg, TDMA_CONTROL);
1554 
1555 	/* Program the number of descriptors as MAX_THRESHOLD and half of
1556 	 * its size for the hysteresis trigger
1557 	 */
1558 	tdma_writel(priv, ring->size |
1559 			1 << RING_HYST_THRESH_SHIFT,
1560 			TDMA_DESC_RING_MAX_HYST(index));
1561 
1562 	/* Enable the ring queue in the arbiter */
1563 	reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1564 	reg |= (1 << index);
1565 	tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1566 
1567 	napi_enable(&ring->napi);
1568 
1569 	netif_dbg(priv, hw, priv->netdev,
1570 		  "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1571 		  ring->size, ring->switch_queue,
1572 		  ring->switch_port);
1573 
1574 	return 0;
1575 }
1576 
1577 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1578 				     unsigned int index)
1579 {
1580 	struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1581 	u32 reg;
1582 
1583 	/* Caller should stop the TDMA engine */
1584 	reg = tdma_readl(priv, TDMA_STATUS);
1585 	if (!(reg & TDMA_DISABLED))
1586 		netdev_warn(priv->netdev, "TDMA not stopped!\n");
1587 
1588 	/* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1589 	 * fail, so by checking this pointer we know whether the TX ring was
1590 	 * fully initialized or not.
1591 	 */
1592 	if (!ring->cbs)
1593 		return;
1594 
1595 	napi_disable(&ring->napi);
1596 	netif_napi_del(&ring->napi);
1597 
1598 	bcm_sysport_tx_clean(priv, ring);
1599 
1600 	kfree(ring->cbs);
1601 	ring->cbs = NULL;
1602 	ring->size = 0;
1603 	ring->alloc_size = 0;
1604 
1605 	netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1606 }
1607 
1608 /* RDMA helper */
1609 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1610 				  unsigned int enable)
1611 {
1612 	unsigned int timeout = 1000;
1613 	u32 reg;
1614 
1615 	reg = rdma_readl(priv, RDMA_CONTROL);
1616 	if (enable)
1617 		reg |= RDMA_EN;
1618 	else
1619 		reg &= ~RDMA_EN;
1620 	rdma_writel(priv, reg, RDMA_CONTROL);
1621 
1622 	/* Poll for RMDA disabling completion */
1623 	do {
1624 		reg = rdma_readl(priv, RDMA_STATUS);
1625 		if (!!(reg & RDMA_DISABLED) == !enable)
1626 			return 0;
1627 		usleep_range(1000, 2000);
1628 	} while (timeout-- > 0);
1629 
1630 	netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1631 
1632 	return -ETIMEDOUT;
1633 }
1634 
1635 /* TDMA helper */
1636 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1637 				  unsigned int enable)
1638 {
1639 	unsigned int timeout = 1000;
1640 	u32 reg;
1641 
1642 	reg = tdma_readl(priv, TDMA_CONTROL);
1643 	if (enable)
1644 		reg |= tdma_control_bit(priv, TDMA_EN);
1645 	else
1646 		reg &= ~tdma_control_bit(priv, TDMA_EN);
1647 	tdma_writel(priv, reg, TDMA_CONTROL);
1648 
1649 	/* Poll for TMDA disabling completion */
1650 	do {
1651 		reg = tdma_readl(priv, TDMA_STATUS);
1652 		if (!!(reg & TDMA_DISABLED) == !enable)
1653 			return 0;
1654 
1655 		usleep_range(1000, 2000);
1656 	} while (timeout-- > 0);
1657 
1658 	netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1659 
1660 	return -ETIMEDOUT;
1661 }
1662 
1663 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1664 {
1665 	struct bcm_sysport_cb *cb;
1666 	u32 reg;
1667 	int ret;
1668 	int i;
1669 
1670 	/* Initialize SW view of the RX ring */
1671 	priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1672 	priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1673 	priv->rx_c_index = 0;
1674 	priv->rx_read_ptr = 0;
1675 	priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1676 				GFP_KERNEL);
1677 	if (!priv->rx_cbs) {
1678 		netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1679 		return -ENOMEM;
1680 	}
1681 
1682 	for (i = 0; i < priv->num_rx_bds; i++) {
1683 		cb = priv->rx_cbs + i;
1684 		cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1685 	}
1686 
1687 	ret = bcm_sysport_alloc_rx_bufs(priv);
1688 	if (ret) {
1689 		netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1690 		return ret;
1691 	}
1692 
1693 	/* Initialize HW, ensure RDMA is disabled */
1694 	reg = rdma_readl(priv, RDMA_STATUS);
1695 	if (!(reg & RDMA_DISABLED))
1696 		rdma_enable_set(priv, 0);
1697 
1698 	rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1699 	rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1700 	rdma_writel(priv, 0, RDMA_PROD_INDEX);
1701 	rdma_writel(priv, 0, RDMA_CONS_INDEX);
1702 	rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1703 			  RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1704 	/* Operate the queue in ring mode */
1705 	rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1706 	rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1707 	rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1708 	rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1709 
1710 	netif_dbg(priv, hw, priv->netdev,
1711 		  "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1712 		  priv->num_rx_bds, priv->rx_bds);
1713 
1714 	return 0;
1715 }
1716 
1717 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1718 {
1719 	struct bcm_sysport_cb *cb;
1720 	unsigned int i;
1721 	u32 reg;
1722 
1723 	/* Caller should ensure RDMA is disabled */
1724 	reg = rdma_readl(priv, RDMA_STATUS);
1725 	if (!(reg & RDMA_DISABLED))
1726 		netdev_warn(priv->netdev, "RDMA not stopped!\n");
1727 
1728 	for (i = 0; i < priv->num_rx_bds; i++) {
1729 		cb = &priv->rx_cbs[i];
1730 		if (dma_unmap_addr(cb, dma_addr))
1731 			dma_unmap_single(&priv->pdev->dev,
1732 					 dma_unmap_addr(cb, dma_addr),
1733 					 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1734 		bcm_sysport_free_cb(cb);
1735 	}
1736 
1737 	kfree(priv->rx_cbs);
1738 	priv->rx_cbs = NULL;
1739 
1740 	netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1741 }
1742 
1743 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1744 {
1745 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1746 	u32 reg;
1747 
1748 	if (priv->is_lite)
1749 		return;
1750 
1751 	reg = umac_readl(priv, UMAC_CMD);
1752 	if (dev->flags & IFF_PROMISC)
1753 		reg |= CMD_PROMISC;
1754 	else
1755 		reg &= ~CMD_PROMISC;
1756 	umac_writel(priv, reg, UMAC_CMD);
1757 
1758 	/* No support for ALLMULTI */
1759 	if (dev->flags & IFF_ALLMULTI)
1760 		return;
1761 }
1762 
1763 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1764 				   u32 mask, unsigned int enable)
1765 {
1766 	u32 reg;
1767 
1768 	if (!priv->is_lite) {
1769 		reg = umac_readl(priv, UMAC_CMD);
1770 		if (enable)
1771 			reg |= mask;
1772 		else
1773 			reg &= ~mask;
1774 		umac_writel(priv, reg, UMAC_CMD);
1775 	} else {
1776 		reg = gib_readl(priv, GIB_CONTROL);
1777 		if (enable)
1778 			reg |= mask;
1779 		else
1780 			reg &= ~mask;
1781 		gib_writel(priv, reg, GIB_CONTROL);
1782 	}
1783 
1784 	/* UniMAC stops on a packet boundary, wait for a full-sized packet
1785 	 * to be processed (1 msec).
1786 	 */
1787 	if (enable == 0)
1788 		usleep_range(1000, 2000);
1789 }
1790 
1791 static inline void umac_reset(struct bcm_sysport_priv *priv)
1792 {
1793 	u32 reg;
1794 
1795 	if (priv->is_lite)
1796 		return;
1797 
1798 	reg = umac_readl(priv, UMAC_CMD);
1799 	reg |= CMD_SW_RESET;
1800 	umac_writel(priv, reg, UMAC_CMD);
1801 	udelay(10);
1802 	reg = umac_readl(priv, UMAC_CMD);
1803 	reg &= ~CMD_SW_RESET;
1804 	umac_writel(priv, reg, UMAC_CMD);
1805 }
1806 
1807 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1808 			     unsigned char *addr)
1809 {
1810 	u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1811 		    addr[3];
1812 	u32 mac1 = (addr[4] << 8) | addr[5];
1813 
1814 	if (!priv->is_lite) {
1815 		umac_writel(priv, mac0, UMAC_MAC0);
1816 		umac_writel(priv, mac1, UMAC_MAC1);
1817 	} else {
1818 		gib_writel(priv, mac0, GIB_MAC0);
1819 		gib_writel(priv, mac1, GIB_MAC1);
1820 	}
1821 }
1822 
1823 static void topctrl_flush(struct bcm_sysport_priv *priv)
1824 {
1825 	topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1826 	topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1827 	mdelay(1);
1828 	topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1829 	topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1830 }
1831 
1832 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1833 {
1834 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1835 	struct sockaddr *addr = p;
1836 
1837 	if (!is_valid_ether_addr(addr->sa_data))
1838 		return -EINVAL;
1839 
1840 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1841 
1842 	/* interface is disabled, changes to MAC will be reflected on next
1843 	 * open call
1844 	 */
1845 	if (!netif_running(dev))
1846 		return 0;
1847 
1848 	umac_set_hw_addr(priv, dev->dev_addr);
1849 
1850 	return 0;
1851 }
1852 
1853 static void bcm_sysport_get_stats64(struct net_device *dev,
1854 				    struct rtnl_link_stats64 *stats)
1855 {
1856 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1857 	struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1858 	unsigned int start;
1859 
1860 	netdev_stats_to_stats64(stats, &dev->stats);
1861 
1862 	bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1863 				    &stats->tx_packets);
1864 
1865 	do {
1866 		start = u64_stats_fetch_begin_irq(&priv->syncp);
1867 		stats->rx_packets = stats64->rx_packets;
1868 		stats->rx_bytes = stats64->rx_bytes;
1869 	} while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1870 }
1871 
1872 static void bcm_sysport_netif_start(struct net_device *dev)
1873 {
1874 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1875 
1876 	/* Enable NAPI */
1877 	bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1878 	bcm_sysport_init_rx_coalesce(priv);
1879 	napi_enable(&priv->napi);
1880 
1881 	/* Enable RX interrupt and TX ring full interrupt */
1882 	intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1883 
1884 	phy_start(dev->phydev);
1885 
1886 	/* Enable TX interrupts for the TXQs */
1887 	if (!priv->is_lite)
1888 		intrl2_1_mask_clear(priv, 0xffffffff);
1889 	else
1890 		intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1891 }
1892 
1893 static void rbuf_init(struct bcm_sysport_priv *priv)
1894 {
1895 	u32 reg;
1896 
1897 	reg = rbuf_readl(priv, RBUF_CONTROL);
1898 	reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1899 	/* Set a correct RSB format on SYSTEMPORT Lite */
1900 	if (priv->is_lite)
1901 		reg &= ~RBUF_RSB_SWAP1;
1902 
1903 	/* Set a correct RSB format based on host endian */
1904 	if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1905 		reg |= RBUF_RSB_SWAP0;
1906 	else
1907 		reg &= ~RBUF_RSB_SWAP0;
1908 	rbuf_writel(priv, reg, RBUF_CONTROL);
1909 }
1910 
1911 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1912 {
1913 	intrl2_0_mask_set(priv, 0xffffffff);
1914 	intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1915 	if (!priv->is_lite) {
1916 		intrl2_1_mask_set(priv, 0xffffffff);
1917 		intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1918 	}
1919 }
1920 
1921 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1922 {
1923 	u32 reg;
1924 
1925 	reg = gib_readl(priv, GIB_CONTROL);
1926 	/* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1927 	if (netdev_uses_dsa(priv->netdev)) {
1928 		reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1929 		reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1930 	}
1931 	reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1932 	reg |= 12 << GIB_IPG_LEN_SHIFT;
1933 	gib_writel(priv, reg, GIB_CONTROL);
1934 }
1935 
1936 static int bcm_sysport_open(struct net_device *dev)
1937 {
1938 	struct bcm_sysport_priv *priv = netdev_priv(dev);
1939 	struct phy_device *phydev;
1940 	unsigned int i;
1941 	int ret;
1942 
1943 	/* Reset UniMAC */
1944 	umac_reset(priv);
1945 
1946 	/* Flush TX and RX FIFOs at TOPCTRL level */
1947 	topctrl_flush(priv);
1948 
1949 	/* Disable the UniMAC RX/TX */
1950 	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1951 
1952 	/* Enable RBUF 2bytes alignment and Receive Status Block */
1953 	rbuf_init(priv);
1954 
1955 	/* Set maximum frame length */
1956 	if (!priv->is_lite)
1957 		umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1958 	else
1959 		gib_set_pad_extension(priv);
1960 
1961 	/* Apply features again in case we changed them while interface was
1962 	 * down
1963 	 */
1964 	bcm_sysport_set_features(dev, dev->features);
1965 
1966 	/* Set MAC address */
1967 	umac_set_hw_addr(priv, dev->dev_addr);
1968 
1969 	phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1970 				0, priv->phy_interface);
1971 	if (!phydev) {
1972 		netdev_err(dev, "could not attach to PHY\n");
1973 		return -ENODEV;
1974 	}
1975 
1976 	/* Reset house keeping link status */
1977 	priv->old_duplex = -1;
1978 	priv->old_link = -1;
1979 	priv->old_pause = -1;
1980 
1981 	/* mask all interrupts and request them */
1982 	bcm_sysport_mask_all_intrs(priv);
1983 
1984 	ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1985 	if (ret) {
1986 		netdev_err(dev, "failed to request RX interrupt\n");
1987 		goto out_phy_disconnect;
1988 	}
1989 
1990 	if (!priv->is_lite) {
1991 		ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1992 				  dev->name, dev);
1993 		if (ret) {
1994 			netdev_err(dev, "failed to request TX interrupt\n");
1995 			goto out_free_irq0;
1996 		}
1997 	}
1998 
1999 	/* Initialize both hardware and software ring */
2000 	for (i = 0; i < dev->num_tx_queues; i++) {
2001 		ret = bcm_sysport_init_tx_ring(priv, i);
2002 		if (ret) {
2003 			netdev_err(dev, "failed to initialize TX ring %d\n",
2004 				   i);
2005 			goto out_free_tx_ring;
2006 		}
2007 	}
2008 
2009 	/* Initialize linked-list */
2010 	tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2011 
2012 	/* Initialize RX ring */
2013 	ret = bcm_sysport_init_rx_ring(priv);
2014 	if (ret) {
2015 		netdev_err(dev, "failed to initialize RX ring\n");
2016 		goto out_free_rx_ring;
2017 	}
2018 
2019 	/* Turn on RDMA */
2020 	ret = rdma_enable_set(priv, 1);
2021 	if (ret)
2022 		goto out_free_rx_ring;
2023 
2024 	/* Turn on TDMA */
2025 	ret = tdma_enable_set(priv, 1);
2026 	if (ret)
2027 		goto out_clear_rx_int;
2028 
2029 	/* Turn on UniMAC TX/RX */
2030 	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2031 
2032 	bcm_sysport_netif_start(dev);
2033 
2034 	netif_tx_start_all_queues(dev);
2035 
2036 	return 0;
2037 
2038 out_clear_rx_int:
2039 	intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2040 out_free_rx_ring:
2041 	bcm_sysport_fini_rx_ring(priv);
2042 out_free_tx_ring:
2043 	for (i = 0; i < dev->num_tx_queues; i++)
2044 		bcm_sysport_fini_tx_ring(priv, i);
2045 	if (!priv->is_lite)
2046 		free_irq(priv->irq1, dev);
2047 out_free_irq0:
2048 	free_irq(priv->irq0, dev);
2049 out_phy_disconnect:
2050 	phy_disconnect(phydev);
2051 	return ret;
2052 }
2053 
2054 static void bcm_sysport_netif_stop(struct net_device *dev)
2055 {
2056 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2057 
2058 	/* stop all software from updating hardware */
2059 	netif_tx_disable(dev);
2060 	napi_disable(&priv->napi);
2061 	cancel_work_sync(&priv->dim.dim.work);
2062 	phy_stop(dev->phydev);
2063 
2064 	/* mask all interrupts */
2065 	bcm_sysport_mask_all_intrs(priv);
2066 }
2067 
2068 static int bcm_sysport_stop(struct net_device *dev)
2069 {
2070 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2071 	unsigned int i;
2072 	int ret;
2073 
2074 	bcm_sysport_netif_stop(dev);
2075 
2076 	/* Disable UniMAC RX */
2077 	umac_enable_set(priv, CMD_RX_EN, 0);
2078 
2079 	ret = tdma_enable_set(priv, 0);
2080 	if (ret) {
2081 		netdev_err(dev, "timeout disabling RDMA\n");
2082 		return ret;
2083 	}
2084 
2085 	/* Wait for a maximum packet size to be drained */
2086 	usleep_range(2000, 3000);
2087 
2088 	ret = rdma_enable_set(priv, 0);
2089 	if (ret) {
2090 		netdev_err(dev, "timeout disabling TDMA\n");
2091 		return ret;
2092 	}
2093 
2094 	/* Disable UniMAC TX */
2095 	umac_enable_set(priv, CMD_TX_EN, 0);
2096 
2097 	/* Free RX/TX rings SW structures */
2098 	for (i = 0; i < dev->num_tx_queues; i++)
2099 		bcm_sysport_fini_tx_ring(priv, i);
2100 	bcm_sysport_fini_rx_ring(priv);
2101 
2102 	free_irq(priv->irq0, dev);
2103 	if (!priv->is_lite)
2104 		free_irq(priv->irq1, dev);
2105 
2106 	/* Disconnect from PHY */
2107 	phy_disconnect(dev->phydev);
2108 
2109 	return 0;
2110 }
2111 
2112 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2113 				 u64 location)
2114 {
2115 	unsigned int index;
2116 	u32 reg;
2117 
2118 	for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2119 		reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2120 		reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2121 		reg &= RXCHK_BRCM_TAG_CID_MASK;
2122 		if (reg == location)
2123 			return index;
2124 	}
2125 
2126 	return -EINVAL;
2127 }
2128 
2129 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2130 				struct ethtool_rxnfc *nfc)
2131 {
2132 	int index;
2133 
2134 	/* This is not a rule that we know about */
2135 	index = bcm_sysport_rule_find(priv, nfc->fs.location);
2136 	if (index < 0)
2137 		return -EOPNOTSUPP;
2138 
2139 	nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2140 
2141 	return 0;
2142 }
2143 
2144 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2145 				struct ethtool_rxnfc *nfc)
2146 {
2147 	unsigned int index;
2148 	u32 reg;
2149 
2150 	/* We cannot match locations greater than what the classification ID
2151 	 * permits (256 entries)
2152 	 */
2153 	if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2154 		return -E2BIG;
2155 
2156 	/* We cannot support flows that are not destined for a wake-up */
2157 	if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2158 		return -EOPNOTSUPP;
2159 
2160 	/* All filters are already in use, we cannot match more rules */
2161 	if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2162 	    RXCHK_BRCM_TAG_MAX)
2163 		return -ENOSPC;
2164 
2165 	index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2166 	if (index >= RXCHK_BRCM_TAG_MAX)
2167 		return -ENOSPC;
2168 
2169 	/* Location is the classification ID, and index is the position
2170 	 * within one of our 8 possible filters to be programmed
2171 	 */
2172 	reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2173 	reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2174 	reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2175 	rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2176 	rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2177 
2178 	priv->filters_loc[index] = nfc->fs.location;
2179 	set_bit(index, priv->filters);
2180 
2181 	return 0;
2182 }
2183 
2184 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2185 				u64 location)
2186 {
2187 	int index;
2188 
2189 	/* This is not a rule that we know about */
2190 	index = bcm_sysport_rule_find(priv, location);
2191 	if (index < 0)
2192 		return -EOPNOTSUPP;
2193 
2194 	/* No need to disable this filter if it was enabled, this will
2195 	 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2196 	 */
2197 	clear_bit(index, priv->filters);
2198 	priv->filters_loc[index] = 0;
2199 
2200 	return 0;
2201 }
2202 
2203 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2204 				 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2205 {
2206 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2207 	int ret = -EOPNOTSUPP;
2208 
2209 	switch (nfc->cmd) {
2210 	case ETHTOOL_GRXCLSRULE:
2211 		ret = bcm_sysport_rule_get(priv, nfc);
2212 		break;
2213 	default:
2214 		break;
2215 	}
2216 
2217 	return ret;
2218 }
2219 
2220 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2221 				 struct ethtool_rxnfc *nfc)
2222 {
2223 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2224 	int ret = -EOPNOTSUPP;
2225 
2226 	switch (nfc->cmd) {
2227 	case ETHTOOL_SRXCLSRLINS:
2228 		ret = bcm_sysport_rule_set(priv, nfc);
2229 		break;
2230 	case ETHTOOL_SRXCLSRLDEL:
2231 		ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2232 		break;
2233 	default:
2234 		break;
2235 	}
2236 
2237 	return ret;
2238 }
2239 
2240 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2241 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2242 				     ETHTOOL_COALESCE_MAX_FRAMES |
2243 				     ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2244 	.get_drvinfo		= bcm_sysport_get_drvinfo,
2245 	.get_msglevel		= bcm_sysport_get_msglvl,
2246 	.set_msglevel		= bcm_sysport_set_msglvl,
2247 	.get_link		= ethtool_op_get_link,
2248 	.get_strings		= bcm_sysport_get_strings,
2249 	.get_ethtool_stats	= bcm_sysport_get_stats,
2250 	.get_sset_count		= bcm_sysport_get_sset_count,
2251 	.get_wol		= bcm_sysport_get_wol,
2252 	.set_wol		= bcm_sysport_set_wol,
2253 	.get_coalesce		= bcm_sysport_get_coalesce,
2254 	.set_coalesce		= bcm_sysport_set_coalesce,
2255 	.get_link_ksettings     = phy_ethtool_get_link_ksettings,
2256 	.set_link_ksettings     = phy_ethtool_set_link_ksettings,
2257 	.get_rxnfc		= bcm_sysport_get_rxnfc,
2258 	.set_rxnfc		= bcm_sysport_set_rxnfc,
2259 };
2260 
2261 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2262 				    struct net_device *sb_dev)
2263 {
2264 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2265 	u16 queue = skb_get_queue_mapping(skb);
2266 	struct bcm_sysport_tx_ring *tx_ring;
2267 	unsigned int q, port;
2268 
2269 	if (!netdev_uses_dsa(dev))
2270 		return netdev_pick_tx(dev, skb, NULL);
2271 
2272 	/* DSA tagging layer will have configured the correct queue */
2273 	q = BRCM_TAG_GET_QUEUE(queue);
2274 	port = BRCM_TAG_GET_PORT(queue);
2275 	tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2276 
2277 	if (unlikely(!tx_ring))
2278 		return netdev_pick_tx(dev, skb, NULL);
2279 
2280 	return tx_ring->index;
2281 }
2282 
2283 static const struct net_device_ops bcm_sysport_netdev_ops = {
2284 	.ndo_start_xmit		= bcm_sysport_xmit,
2285 	.ndo_tx_timeout		= bcm_sysport_tx_timeout,
2286 	.ndo_open		= bcm_sysport_open,
2287 	.ndo_stop		= bcm_sysport_stop,
2288 	.ndo_set_features	= bcm_sysport_set_features,
2289 	.ndo_set_rx_mode	= bcm_sysport_set_rx_mode,
2290 	.ndo_set_mac_address	= bcm_sysport_change_mac,
2291 #ifdef CONFIG_NET_POLL_CONTROLLER
2292 	.ndo_poll_controller	= bcm_sysport_poll_controller,
2293 #endif
2294 	.ndo_get_stats64	= bcm_sysport_get_stats64,
2295 	.ndo_select_queue	= bcm_sysport_select_queue,
2296 };
2297 
2298 static int bcm_sysport_map_queues(struct notifier_block *nb,
2299 				  struct dsa_notifier_register_info *info)
2300 {
2301 	struct bcm_sysport_tx_ring *ring;
2302 	struct bcm_sysport_priv *priv;
2303 	struct net_device *slave_dev;
2304 	unsigned int num_tx_queues;
2305 	unsigned int q, qp, port;
2306 	struct net_device *dev;
2307 
2308 	priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2309 	if (priv->netdev != info->master)
2310 		return 0;
2311 
2312 	dev = info->master;
2313 
2314 	/* We can't be setting up queue inspection for non directly attached
2315 	 * switches
2316 	 */
2317 	if (info->switch_number)
2318 		return 0;
2319 
2320 	if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2321 		return 0;
2322 
2323 	port = info->port_number;
2324 	slave_dev = info->info.dev;
2325 
2326 	/* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2327 	 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2328 	 * per-port (slave_dev) network devices queue, we achieve just that.
2329 	 * This need to happen now before any slave network device is used such
2330 	 * it accurately reflects the number of real TX queues.
2331 	 */
2332 	if (priv->is_lite)
2333 		netif_set_real_num_tx_queues(slave_dev,
2334 					     slave_dev->num_tx_queues / 2);
2335 
2336 	num_tx_queues = slave_dev->real_num_tx_queues;
2337 
2338 	if (priv->per_port_num_tx_queues &&
2339 	    priv->per_port_num_tx_queues != num_tx_queues)
2340 		netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2341 
2342 	priv->per_port_num_tx_queues = num_tx_queues;
2343 
2344 	for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2345 	     q++) {
2346 		ring = &priv->tx_rings[q];
2347 
2348 		if (ring->inspect)
2349 			continue;
2350 
2351 		/* Just remember the mapping actual programming done
2352 		 * during bcm_sysport_init_tx_ring
2353 		 */
2354 		ring->switch_queue = qp;
2355 		ring->switch_port = port;
2356 		ring->inspect = true;
2357 		priv->ring_map[qp + port * num_tx_queues] = ring;
2358 		qp++;
2359 	}
2360 
2361 	return 0;
2362 }
2363 
2364 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2365 				    struct dsa_notifier_register_info *info)
2366 {
2367 	struct bcm_sysport_tx_ring *ring;
2368 	struct bcm_sysport_priv *priv;
2369 	struct net_device *slave_dev;
2370 	unsigned int num_tx_queues;
2371 	struct net_device *dev;
2372 	unsigned int q, qp, port;
2373 
2374 	priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2375 	if (priv->netdev != info->master)
2376 		return 0;
2377 
2378 	dev = info->master;
2379 
2380 	if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2381 		return 0;
2382 
2383 	port = info->port_number;
2384 	slave_dev = info->info.dev;
2385 
2386 	num_tx_queues = slave_dev->real_num_tx_queues;
2387 
2388 	for (q = 0; q < dev->num_tx_queues; q++) {
2389 		ring = &priv->tx_rings[q];
2390 
2391 		if (ring->switch_port != port)
2392 			continue;
2393 
2394 		if (!ring->inspect)
2395 			continue;
2396 
2397 		ring->inspect = false;
2398 		qp = ring->switch_queue;
2399 		priv->ring_map[qp + port * num_tx_queues] = NULL;
2400 	}
2401 
2402 	return 0;
2403 }
2404 
2405 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2406 				    unsigned long event, void *ptr)
2407 {
2408 	int ret = NOTIFY_DONE;
2409 
2410 	switch (event) {
2411 	case DSA_PORT_REGISTER:
2412 		ret = bcm_sysport_map_queues(nb, ptr);
2413 		break;
2414 	case DSA_PORT_UNREGISTER:
2415 		ret = bcm_sysport_unmap_queues(nb, ptr);
2416 		break;
2417 	}
2418 
2419 	return notifier_from_errno(ret);
2420 }
2421 
2422 #define REV_FMT	"v%2x.%02x"
2423 
2424 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2425 	[SYSTEMPORT] = {
2426 		.is_lite = false,
2427 		.num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2428 	},
2429 	[SYSTEMPORT_LITE] = {
2430 		.is_lite = true,
2431 		.num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2432 	},
2433 };
2434 
2435 static const struct of_device_id bcm_sysport_of_match[] = {
2436 	{ .compatible = "brcm,systemportlite-v1.00",
2437 	  .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2438 	{ .compatible = "brcm,systemport-v1.00",
2439 	  .data = &bcm_sysport_params[SYSTEMPORT] },
2440 	{ .compatible = "brcm,systemport",
2441 	  .data = &bcm_sysport_params[SYSTEMPORT] },
2442 	{ /* sentinel */ }
2443 };
2444 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2445 
2446 static int bcm_sysport_probe(struct platform_device *pdev)
2447 {
2448 	const struct bcm_sysport_hw_params *params;
2449 	const struct of_device_id *of_id = NULL;
2450 	struct bcm_sysport_priv *priv;
2451 	struct device_node *dn;
2452 	struct net_device *dev;
2453 	const void *macaddr;
2454 	u32 txq, rxq;
2455 	int ret;
2456 
2457 	dn = pdev->dev.of_node;
2458 	of_id = of_match_node(bcm_sysport_of_match, dn);
2459 	if (!of_id || !of_id->data)
2460 		return -EINVAL;
2461 
2462 	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2463 	if (ret)
2464 		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2465 	if (ret) {
2466 		dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2467 		return ret;
2468 	}
2469 
2470 	/* Fairly quickly we need to know the type of adapter we have */
2471 	params = of_id->data;
2472 
2473 	/* Read the Transmit/Receive Queue properties */
2474 	if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2475 		txq = TDMA_NUM_RINGS;
2476 	if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2477 		rxq = 1;
2478 
2479 	/* Sanity check the number of transmit queues */
2480 	if (!txq || txq > TDMA_NUM_RINGS)
2481 		return -EINVAL;
2482 
2483 	dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2484 	if (!dev)
2485 		return -ENOMEM;
2486 
2487 	/* Initialize private members */
2488 	priv = netdev_priv(dev);
2489 
2490 	/* Allocate number of TX rings */
2491 	priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2492 				      sizeof(struct bcm_sysport_tx_ring),
2493 				      GFP_KERNEL);
2494 	if (!priv->tx_rings)
2495 		return -ENOMEM;
2496 
2497 	priv->is_lite = params->is_lite;
2498 	priv->num_rx_desc_words = params->num_rx_desc_words;
2499 
2500 	priv->irq0 = platform_get_irq(pdev, 0);
2501 	if (!priv->is_lite) {
2502 		priv->irq1 = platform_get_irq(pdev, 1);
2503 		priv->wol_irq = platform_get_irq(pdev, 2);
2504 	} else {
2505 		priv->wol_irq = platform_get_irq(pdev, 1);
2506 	}
2507 	if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2508 		ret = -EINVAL;
2509 		goto err_free_netdev;
2510 	}
2511 
2512 	priv->base = devm_platform_ioremap_resource(pdev, 0);
2513 	if (IS_ERR(priv->base)) {
2514 		ret = PTR_ERR(priv->base);
2515 		goto err_free_netdev;
2516 	}
2517 
2518 	priv->netdev = dev;
2519 	priv->pdev = pdev;
2520 
2521 	ret = of_get_phy_mode(dn, &priv->phy_interface);
2522 	/* Default to GMII interface mode */
2523 	if (ret)
2524 		priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2525 
2526 	/* In the case of a fixed PHY, the DT node associated
2527 	 * to the PHY is the Ethernet MAC DT node.
2528 	 */
2529 	if (of_phy_is_fixed_link(dn)) {
2530 		ret = of_phy_register_fixed_link(dn);
2531 		if (ret) {
2532 			dev_err(&pdev->dev, "failed to register fixed PHY\n");
2533 			goto err_free_netdev;
2534 		}
2535 
2536 		priv->phy_dn = dn;
2537 	}
2538 
2539 	/* Initialize netdevice members */
2540 	macaddr = of_get_mac_address(dn);
2541 	if (IS_ERR(macaddr)) {
2542 		dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2543 		eth_hw_addr_random(dev);
2544 	} else {
2545 		ether_addr_copy(dev->dev_addr, macaddr);
2546 	}
2547 
2548 	SET_NETDEV_DEV(dev, &pdev->dev);
2549 	dev_set_drvdata(&pdev->dev, dev);
2550 	dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2551 	dev->netdev_ops = &bcm_sysport_netdev_ops;
2552 	netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2553 
2554 	dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2555 			 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2556 			 NETIF_F_HW_VLAN_CTAG_TX;
2557 	dev->hw_features |= dev->features;
2558 	dev->vlan_features |= dev->features;
2559 
2560 	/* Request the WOL interrupt and advertise suspend if available */
2561 	priv->wol_irq_disabled = 1;
2562 	ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2563 			       bcm_sysport_wol_isr, 0, dev->name, priv);
2564 	if (!ret)
2565 		device_set_wakeup_capable(&pdev->dev, 1);
2566 
2567 	/* Set the needed headroom once and for all */
2568 	BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2569 	dev->needed_headroom += sizeof(struct bcm_tsb);
2570 
2571 	/* libphy will adjust the link state accordingly */
2572 	netif_carrier_off(dev);
2573 
2574 	priv->rx_max_coalesced_frames = 1;
2575 	u64_stats_init(&priv->syncp);
2576 
2577 	priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2578 
2579 	ret = register_dsa_notifier(&priv->dsa_notifier);
2580 	if (ret) {
2581 		dev_err(&pdev->dev, "failed to register DSA notifier\n");
2582 		goto err_deregister_fixed_link;
2583 	}
2584 
2585 	ret = register_netdev(dev);
2586 	if (ret) {
2587 		dev_err(&pdev->dev, "failed to register net_device\n");
2588 		goto err_deregister_notifier;
2589 	}
2590 
2591 	priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2592 	dev_info(&pdev->dev,
2593 		 "Broadcom SYSTEMPORT%s " REV_FMT
2594 		 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2595 		 priv->is_lite ? " Lite" : "",
2596 		 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2597 		 priv->irq0, priv->irq1, txq, rxq);
2598 
2599 	return 0;
2600 
2601 err_deregister_notifier:
2602 	unregister_dsa_notifier(&priv->dsa_notifier);
2603 err_deregister_fixed_link:
2604 	if (of_phy_is_fixed_link(dn))
2605 		of_phy_deregister_fixed_link(dn);
2606 err_free_netdev:
2607 	free_netdev(dev);
2608 	return ret;
2609 }
2610 
2611 static int bcm_sysport_remove(struct platform_device *pdev)
2612 {
2613 	struct net_device *dev = dev_get_drvdata(&pdev->dev);
2614 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2615 	struct device_node *dn = pdev->dev.of_node;
2616 
2617 	/* Not much to do, ndo_close has been called
2618 	 * and we use managed allocations
2619 	 */
2620 	unregister_dsa_notifier(&priv->dsa_notifier);
2621 	unregister_netdev(dev);
2622 	if (of_phy_is_fixed_link(dn))
2623 		of_phy_deregister_fixed_link(dn);
2624 	free_netdev(dev);
2625 	dev_set_drvdata(&pdev->dev, NULL);
2626 
2627 	return 0;
2628 }
2629 
2630 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2631 {
2632 	struct net_device *ndev = priv->netdev;
2633 	unsigned int timeout = 1000;
2634 	unsigned int index, i = 0;
2635 	u32 reg;
2636 
2637 	reg = umac_readl(priv, UMAC_MPD_CTRL);
2638 	if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2639 		reg |= MPD_EN;
2640 	reg &= ~PSW_EN;
2641 	if (priv->wolopts & WAKE_MAGICSECURE) {
2642 		/* Program the SecureOn password */
2643 		umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2644 			    UMAC_PSW_MS);
2645 		umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2646 			    UMAC_PSW_LS);
2647 		reg |= PSW_EN;
2648 	}
2649 	umac_writel(priv, reg, UMAC_MPD_CTRL);
2650 
2651 	if (priv->wolopts & WAKE_FILTER) {
2652 		/* Turn on ACPI matching to steal packets from RBUF */
2653 		reg = rbuf_readl(priv, RBUF_CONTROL);
2654 		if (priv->is_lite)
2655 			reg |= RBUF_ACPI_EN_LITE;
2656 		else
2657 			reg |= RBUF_ACPI_EN;
2658 		rbuf_writel(priv, reg, RBUF_CONTROL);
2659 
2660 		/* Enable RXCHK, active filters and Broadcom tag matching */
2661 		reg = rxchk_readl(priv, RXCHK_CONTROL);
2662 		reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2663 			 RXCHK_BRCM_TAG_MATCH_SHIFT);
2664 		for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2665 			reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2666 			i++;
2667 		}
2668 		reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2669 		rxchk_writel(priv, reg, RXCHK_CONTROL);
2670 	}
2671 
2672 	/* Make sure RBUF entered WoL mode as result */
2673 	do {
2674 		reg = rbuf_readl(priv, RBUF_STATUS);
2675 		if (reg & RBUF_WOL_MODE)
2676 			break;
2677 
2678 		udelay(10);
2679 	} while (timeout-- > 0);
2680 
2681 	/* Do not leave the UniMAC RBUF matching only MPD packets */
2682 	if (!timeout) {
2683 		mpd_enable_set(priv, false);
2684 		netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2685 		return -ETIMEDOUT;
2686 	}
2687 
2688 	/* UniMAC receive needs to be turned on */
2689 	umac_enable_set(priv, CMD_RX_EN, 1);
2690 
2691 	netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2692 
2693 	return 0;
2694 }
2695 
2696 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2697 {
2698 	struct net_device *dev = dev_get_drvdata(d);
2699 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2700 	unsigned int i;
2701 	int ret = 0;
2702 	u32 reg;
2703 
2704 	if (!netif_running(dev))
2705 		return 0;
2706 
2707 	netif_device_detach(dev);
2708 
2709 	bcm_sysport_netif_stop(dev);
2710 
2711 	phy_suspend(dev->phydev);
2712 
2713 	/* Disable UniMAC RX */
2714 	umac_enable_set(priv, CMD_RX_EN, 0);
2715 
2716 	ret = rdma_enable_set(priv, 0);
2717 	if (ret) {
2718 		netdev_err(dev, "RDMA timeout!\n");
2719 		return ret;
2720 	}
2721 
2722 	/* Disable RXCHK if enabled */
2723 	if (priv->rx_chk_en) {
2724 		reg = rxchk_readl(priv, RXCHK_CONTROL);
2725 		reg &= ~RXCHK_EN;
2726 		rxchk_writel(priv, reg, RXCHK_CONTROL);
2727 	}
2728 
2729 	/* Flush RX pipe */
2730 	if (!priv->wolopts)
2731 		topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2732 
2733 	ret = tdma_enable_set(priv, 0);
2734 	if (ret) {
2735 		netdev_err(dev, "TDMA timeout!\n");
2736 		return ret;
2737 	}
2738 
2739 	/* Wait for a packet boundary */
2740 	usleep_range(2000, 3000);
2741 
2742 	umac_enable_set(priv, CMD_TX_EN, 0);
2743 
2744 	topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2745 
2746 	/* Free RX/TX rings SW structures */
2747 	for (i = 0; i < dev->num_tx_queues; i++)
2748 		bcm_sysport_fini_tx_ring(priv, i);
2749 	bcm_sysport_fini_rx_ring(priv);
2750 
2751 	/* Get prepared for Wake-on-LAN */
2752 	if (device_may_wakeup(d) && priv->wolopts)
2753 		ret = bcm_sysport_suspend_to_wol(priv);
2754 
2755 	return ret;
2756 }
2757 
2758 static int __maybe_unused bcm_sysport_resume(struct device *d)
2759 {
2760 	struct net_device *dev = dev_get_drvdata(d);
2761 	struct bcm_sysport_priv *priv = netdev_priv(dev);
2762 	unsigned int i;
2763 	int ret;
2764 
2765 	if (!netif_running(dev))
2766 		return 0;
2767 
2768 	umac_reset(priv);
2769 
2770 	/* Disable the UniMAC RX/TX */
2771 	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2772 
2773 	/* We may have been suspended and never received a WOL event that
2774 	 * would turn off MPD detection, take care of that now
2775 	 */
2776 	bcm_sysport_resume_from_wol(priv);
2777 
2778 	/* Initialize both hardware and software ring */
2779 	for (i = 0; i < dev->num_tx_queues; i++) {
2780 		ret = bcm_sysport_init_tx_ring(priv, i);
2781 		if (ret) {
2782 			netdev_err(dev, "failed to initialize TX ring %d\n",
2783 				   i);
2784 			goto out_free_tx_rings;
2785 		}
2786 	}
2787 
2788 	/* Initialize linked-list */
2789 	tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2790 
2791 	/* Initialize RX ring */
2792 	ret = bcm_sysport_init_rx_ring(priv);
2793 	if (ret) {
2794 		netdev_err(dev, "failed to initialize RX ring\n");
2795 		goto out_free_rx_ring;
2796 	}
2797 
2798 	/* RX pipe enable */
2799 	topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2800 
2801 	ret = rdma_enable_set(priv, 1);
2802 	if (ret) {
2803 		netdev_err(dev, "failed to enable RDMA\n");
2804 		goto out_free_rx_ring;
2805 	}
2806 
2807 	/* Restore enabled features */
2808 	bcm_sysport_set_features(dev, dev->features);
2809 
2810 	rbuf_init(priv);
2811 
2812 	/* Set maximum frame length */
2813 	if (!priv->is_lite)
2814 		umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2815 	else
2816 		gib_set_pad_extension(priv);
2817 
2818 	/* Set MAC address */
2819 	umac_set_hw_addr(priv, dev->dev_addr);
2820 
2821 	umac_enable_set(priv, CMD_RX_EN, 1);
2822 
2823 	/* TX pipe enable */
2824 	topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2825 
2826 	umac_enable_set(priv, CMD_TX_EN, 1);
2827 
2828 	ret = tdma_enable_set(priv, 1);
2829 	if (ret) {
2830 		netdev_err(dev, "TDMA timeout!\n");
2831 		goto out_free_rx_ring;
2832 	}
2833 
2834 	phy_resume(dev->phydev);
2835 
2836 	bcm_sysport_netif_start(dev);
2837 
2838 	netif_device_attach(dev);
2839 
2840 	return 0;
2841 
2842 out_free_rx_ring:
2843 	bcm_sysport_fini_rx_ring(priv);
2844 out_free_tx_rings:
2845 	for (i = 0; i < dev->num_tx_queues; i++)
2846 		bcm_sysport_fini_tx_ring(priv, i);
2847 	return ret;
2848 }
2849 
2850 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2851 		bcm_sysport_suspend, bcm_sysport_resume);
2852 
2853 static struct platform_driver bcm_sysport_driver = {
2854 	.probe	= bcm_sysport_probe,
2855 	.remove	= bcm_sysport_remove,
2856 	.driver =  {
2857 		.name = "brcm-systemport",
2858 		.of_match_table = bcm_sysport_of_match,
2859 		.pm = &bcm_sysport_pm_ops,
2860 	},
2861 };
2862 module_platform_driver(bcm_sysport_driver);
2863 
2864 MODULE_AUTHOR("Broadcom Corporation");
2865 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2866 MODULE_ALIAS("platform:brcm-systemport");
2867 MODULE_LICENSE("GPL");
2868