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Merge tag 'omap-for-v5.0/fixes-rc7-signed' of git://git.kernel.org/pub/scm/linux...
[mirror_ubuntu-eoan-kernel.git] / drivers / net / ethernet / broadcom / bcmsysport.c
1 /*
2 * Broadcom BCM7xxx System Port Ethernet MAC driver
3 *
4 * Copyright (C) 2014 Broadcom Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/platform_device.h>
20 #include <linux/of.h>
21 #include <linux/of_net.h>
22 #include <linux/of_mdio.h>
23 #include <linux/phy.h>
24 #include <linux/phy_fixed.h>
25 #include <net/dsa.h>
26 #include <net/ip.h>
27 #include <net/ipv6.h>
28
29 #include "bcmsysport.h"
30
31 /* I/O accessors register helpers */
32 #define BCM_SYSPORT_IO_MACRO(name, offset) \
33 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \
34 { \
35 u32 reg = readl_relaxed(priv->base + offset + off); \
36 return reg; \
37 } \
38 static inline void name##_writel(struct bcm_sysport_priv *priv, \
39 u32 val, u32 off) \
40 { \
41 writel_relaxed(val, priv->base + offset + off); \
42 } \
43
44 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
45 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
46 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
47 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
48 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
49 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
50 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
51 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
52 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
53 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
54
55 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
56 * same layout, except it has been moved by 4 bytes up, *sigh*
57 */
58 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
59 {
60 if (priv->is_lite && off >= RDMA_STATUS)
61 off += 4;
62 return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
63 }
64
65 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
66 {
67 if (priv->is_lite && off >= RDMA_STATUS)
68 off += 4;
69 writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
70 }
71
72 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
73 {
74 if (!priv->is_lite) {
75 return BIT(bit);
76 } else {
77 if (bit >= ACB_ALGO)
78 return BIT(bit + 1);
79 else
80 return BIT(bit);
81 }
82 }
83
84 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
85 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
86 */
87 #define BCM_SYSPORT_INTR_L2(which) \
88 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
89 u32 mask) \
90 { \
91 priv->irq##which##_mask &= ~(mask); \
92 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
93 } \
94 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
95 u32 mask) \
96 { \
97 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
98 priv->irq##which##_mask |= (mask); \
99 } \
100
101 BCM_SYSPORT_INTR_L2(0)
102 BCM_SYSPORT_INTR_L2(1)
103
104 /* Register accesses to GISB/RBUS registers are expensive (few hundred
105 * nanoseconds), so keep the check for 64-bits explicit here to save
106 * one register write per-packet on 32-bits platforms.
107 */
108 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
109 void __iomem *d,
110 dma_addr_t addr)
111 {
112 #ifdef CONFIG_PHYS_ADDR_T_64BIT
113 writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
114 d + DESC_ADDR_HI_STATUS_LEN);
115 #endif
116 writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
117 }
118
119 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
120 struct dma_desc *desc,
121 unsigned int port)
122 {
123 /* Ports are latched, so write upper address first */
124 tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
125 tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
126 }
127
128 /* Ethtool operations */
129 static void bcm_sysport_set_rx_csum(struct net_device *dev,
130 netdev_features_t wanted)
131 {
132 struct bcm_sysport_priv *priv = netdev_priv(dev);
133 u32 reg;
134
135 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
136 reg = rxchk_readl(priv, RXCHK_CONTROL);
137 if (priv->rx_chk_en)
138 reg |= RXCHK_EN;
139 else
140 reg &= ~RXCHK_EN;
141
142 /* If UniMAC forwards CRC, we need to skip over it to get
143 * a valid CHK bit to be set in the per-packet status word
144 */
145 if (priv->rx_chk_en && priv->crc_fwd)
146 reg |= RXCHK_SKIP_FCS;
147 else
148 reg &= ~RXCHK_SKIP_FCS;
149
150 /* If Broadcom tags are enabled (e.g: using a switch), make
151 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
152 * tag after the Ethernet MAC Source Address.
153 */
154 if (netdev_uses_dsa(dev))
155 reg |= RXCHK_BRCM_TAG_EN;
156 else
157 reg &= ~RXCHK_BRCM_TAG_EN;
158
159 rxchk_writel(priv, reg, RXCHK_CONTROL);
160 }
161
162 static void bcm_sysport_set_tx_csum(struct net_device *dev,
163 netdev_features_t wanted)
164 {
165 struct bcm_sysport_priv *priv = netdev_priv(dev);
166 u32 reg;
167
168 /* Hardware transmit checksum requires us to enable the Transmit status
169 * block prepended to the packet contents
170 */
171 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
172 reg = tdma_readl(priv, TDMA_CONTROL);
173 if (priv->tsb_en)
174 reg |= tdma_control_bit(priv, TSB_EN);
175 else
176 reg &= ~tdma_control_bit(priv, TSB_EN);
177 tdma_writel(priv, reg, TDMA_CONTROL);
178 }
179
180 static int bcm_sysport_set_features(struct net_device *dev,
181 netdev_features_t features)
182 {
183 struct bcm_sysport_priv *priv = netdev_priv(dev);
184
185 /* Read CRC forward */
186 if (!priv->is_lite)
187 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
188 else
189 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
190 GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
191
192 bcm_sysport_set_rx_csum(dev, features);
193 bcm_sysport_set_tx_csum(dev, features);
194
195 return 0;
196 }
197
198 /* Hardware counters must be kept in sync because the order/offset
199 * is important here (order in structure declaration = order in hardware)
200 */
201 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
202 /* general stats */
203 STAT_NETDEV64(rx_packets),
204 STAT_NETDEV64(tx_packets),
205 STAT_NETDEV64(rx_bytes),
206 STAT_NETDEV64(tx_bytes),
207 STAT_NETDEV(rx_errors),
208 STAT_NETDEV(tx_errors),
209 STAT_NETDEV(rx_dropped),
210 STAT_NETDEV(tx_dropped),
211 STAT_NETDEV(multicast),
212 /* UniMAC RSV counters */
213 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
214 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
215 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
216 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
217 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
218 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
219 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
220 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
221 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
222 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
223 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
224 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
225 STAT_MIB_RX("rx_multicast", mib.rx.mca),
226 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
227 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
228 STAT_MIB_RX("rx_control", mib.rx.cf),
229 STAT_MIB_RX("rx_pause", mib.rx.pf),
230 STAT_MIB_RX("rx_unknown", mib.rx.uo),
231 STAT_MIB_RX("rx_align", mib.rx.aln),
232 STAT_MIB_RX("rx_outrange", mib.rx.flr),
233 STAT_MIB_RX("rx_code", mib.rx.cde),
234 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
235 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
236 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
237 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
238 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
239 STAT_MIB_RX("rx_unicast", mib.rx.uc),
240 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
241 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
242 /* UniMAC TSV counters */
243 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
244 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
245 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
246 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
247 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
248 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
249 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
250 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
251 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
252 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
253 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
254 STAT_MIB_TX("tx_multicast", mib.tx.mca),
255 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
256 STAT_MIB_TX("tx_pause", mib.tx.pf),
257 STAT_MIB_TX("tx_control", mib.tx.cf),
258 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
259 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
260 STAT_MIB_TX("tx_defer", mib.tx.drf),
261 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
262 STAT_MIB_TX("tx_single_col", mib.tx.scl),
263 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
264 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
265 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
266 STAT_MIB_TX("tx_frags", mib.tx.frg),
267 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
268 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
269 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
270 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
271 STAT_MIB_TX("tx_unicast", mib.tx.uc),
272 /* UniMAC RUNT counters */
273 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
274 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
275 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
276 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
277 /* RXCHK misc statistics */
278 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
279 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
280 RXCHK_OTHER_DISC_CNTR),
281 /* RBUF misc statistics */
282 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
283 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
284 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
285 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
286 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
287 STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
288 STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
289 /* Per TX-queue statistics are dynamically appended */
290 };
291
292 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
293
294 static void bcm_sysport_get_drvinfo(struct net_device *dev,
295 struct ethtool_drvinfo *info)
296 {
297 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
298 strlcpy(info->version, "0.1", sizeof(info->version));
299 strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
300 }
301
302 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
303 {
304 struct bcm_sysport_priv *priv = netdev_priv(dev);
305
306 return priv->msg_enable;
307 }
308
309 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
310 {
311 struct bcm_sysport_priv *priv = netdev_priv(dev);
312
313 priv->msg_enable = enable;
314 }
315
316 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
317 {
318 switch (type) {
319 case BCM_SYSPORT_STAT_NETDEV:
320 case BCM_SYSPORT_STAT_NETDEV64:
321 case BCM_SYSPORT_STAT_RXCHK:
322 case BCM_SYSPORT_STAT_RBUF:
323 case BCM_SYSPORT_STAT_SOFT:
324 return true;
325 default:
326 return false;
327 }
328 }
329
330 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
331 {
332 struct bcm_sysport_priv *priv = netdev_priv(dev);
333 const struct bcm_sysport_stats *s;
334 unsigned int i, j;
335
336 switch (string_set) {
337 case ETH_SS_STATS:
338 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
339 s = &bcm_sysport_gstrings_stats[i];
340 if (priv->is_lite &&
341 !bcm_sysport_lite_stat_valid(s->type))
342 continue;
343 j++;
344 }
345 /* Include per-queue statistics */
346 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
347 default:
348 return -EOPNOTSUPP;
349 }
350 }
351
352 static void bcm_sysport_get_strings(struct net_device *dev,
353 u32 stringset, u8 *data)
354 {
355 struct bcm_sysport_priv *priv = netdev_priv(dev);
356 const struct bcm_sysport_stats *s;
357 char buf[128];
358 int i, j;
359
360 switch (stringset) {
361 case ETH_SS_STATS:
362 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
363 s = &bcm_sysport_gstrings_stats[i];
364 if (priv->is_lite &&
365 !bcm_sysport_lite_stat_valid(s->type))
366 continue;
367
368 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
369 ETH_GSTRING_LEN);
370 j++;
371 }
372
373 for (i = 0; i < dev->num_tx_queues; i++) {
374 snprintf(buf, sizeof(buf), "txq%d_packets", i);
375 memcpy(data + j * ETH_GSTRING_LEN, buf,
376 ETH_GSTRING_LEN);
377 j++;
378
379 snprintf(buf, sizeof(buf), "txq%d_bytes", i);
380 memcpy(data + j * ETH_GSTRING_LEN, buf,
381 ETH_GSTRING_LEN);
382 j++;
383 }
384 break;
385 default:
386 break;
387 }
388 }
389
390 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
391 {
392 int i, j = 0;
393
394 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
395 const struct bcm_sysport_stats *s;
396 u8 offset = 0;
397 u32 val = 0;
398 char *p;
399
400 s = &bcm_sysport_gstrings_stats[i];
401 switch (s->type) {
402 case BCM_SYSPORT_STAT_NETDEV:
403 case BCM_SYSPORT_STAT_NETDEV64:
404 case BCM_SYSPORT_STAT_SOFT:
405 continue;
406 case BCM_SYSPORT_STAT_MIB_RX:
407 case BCM_SYSPORT_STAT_MIB_TX:
408 case BCM_SYSPORT_STAT_RUNT:
409 if (priv->is_lite)
410 continue;
411
412 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
413 offset = UMAC_MIB_STAT_OFFSET;
414 val = umac_readl(priv, UMAC_MIB_START + j + offset);
415 break;
416 case BCM_SYSPORT_STAT_RXCHK:
417 val = rxchk_readl(priv, s->reg_offset);
418 if (val == ~0)
419 rxchk_writel(priv, 0, s->reg_offset);
420 break;
421 case BCM_SYSPORT_STAT_RBUF:
422 val = rbuf_readl(priv, s->reg_offset);
423 if (val == ~0)
424 rbuf_writel(priv, 0, s->reg_offset);
425 break;
426 }
427
428 j += s->stat_sizeof;
429 p = (char *)priv + s->stat_offset;
430 *(u32 *)p = val;
431 }
432
433 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
434 }
435
436 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
437 u64 *tx_bytes, u64 *tx_packets)
438 {
439 struct bcm_sysport_tx_ring *ring;
440 u64 bytes = 0, packets = 0;
441 unsigned int start;
442 unsigned int q;
443
444 for (q = 0; q < priv->netdev->num_tx_queues; q++) {
445 ring = &priv->tx_rings[q];
446 do {
447 start = u64_stats_fetch_begin_irq(&priv->syncp);
448 bytes = ring->bytes;
449 packets = ring->packets;
450 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
451
452 *tx_bytes += bytes;
453 *tx_packets += packets;
454 }
455 }
456
457 static void bcm_sysport_get_stats(struct net_device *dev,
458 struct ethtool_stats *stats, u64 *data)
459 {
460 struct bcm_sysport_priv *priv = netdev_priv(dev);
461 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
462 struct u64_stats_sync *syncp = &priv->syncp;
463 struct bcm_sysport_tx_ring *ring;
464 u64 tx_bytes = 0, tx_packets = 0;
465 unsigned int start;
466 int i, j;
467
468 if (netif_running(dev)) {
469 bcm_sysport_update_mib_counters(priv);
470 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
471 stats64->tx_bytes = tx_bytes;
472 stats64->tx_packets = tx_packets;
473 }
474
475 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
476 const struct bcm_sysport_stats *s;
477 char *p;
478
479 s = &bcm_sysport_gstrings_stats[i];
480 if (s->type == BCM_SYSPORT_STAT_NETDEV)
481 p = (char *)&dev->stats;
482 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
483 p = (char *)stats64;
484 else
485 p = (char *)priv;
486
487 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
488 continue;
489 p += s->stat_offset;
490
491 if (s->stat_sizeof == sizeof(u64) &&
492 s->type == BCM_SYSPORT_STAT_NETDEV64) {
493 do {
494 start = u64_stats_fetch_begin_irq(syncp);
495 data[i] = *(u64 *)p;
496 } while (u64_stats_fetch_retry_irq(syncp, start));
497 } else
498 data[i] = *(u32 *)p;
499 j++;
500 }
501
502 /* For SYSTEMPORT Lite since we have holes in our statistics, j would
503 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
504 * needs to point to how many total statistics we have minus the
505 * number of per TX queue statistics
506 */
507 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
508 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
509
510 for (i = 0; i < dev->num_tx_queues; i++) {
511 ring = &priv->tx_rings[i];
512 data[j] = ring->packets;
513 j++;
514 data[j] = ring->bytes;
515 j++;
516 }
517 }
518
519 static void bcm_sysport_get_wol(struct net_device *dev,
520 struct ethtool_wolinfo *wol)
521 {
522 struct bcm_sysport_priv *priv = netdev_priv(dev);
523
524 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
525 wol->wolopts = priv->wolopts;
526
527 if (!(priv->wolopts & WAKE_MAGICSECURE))
528 return;
529
530 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
531 }
532
533 static int bcm_sysport_set_wol(struct net_device *dev,
534 struct ethtool_wolinfo *wol)
535 {
536 struct bcm_sysport_priv *priv = netdev_priv(dev);
537 struct device *kdev = &priv->pdev->dev;
538 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
539
540 if (!device_can_wakeup(kdev))
541 return -ENOTSUPP;
542
543 if (wol->wolopts & ~supported)
544 return -EINVAL;
545
546 if (wol->wolopts & WAKE_MAGICSECURE)
547 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
548
549 /* Flag the device and relevant IRQ as wakeup capable */
550 if (wol->wolopts) {
551 device_set_wakeup_enable(kdev, 1);
552 if (priv->wol_irq_disabled)
553 enable_irq_wake(priv->wol_irq);
554 priv->wol_irq_disabled = 0;
555 } else {
556 device_set_wakeup_enable(kdev, 0);
557 /* Avoid unbalanced disable_irq_wake calls */
558 if (!priv->wol_irq_disabled)
559 disable_irq_wake(priv->wol_irq);
560 priv->wol_irq_disabled = 1;
561 }
562
563 priv->wolopts = wol->wolopts;
564
565 return 0;
566 }
567
568 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
569 u32 usecs, u32 pkts)
570 {
571 u32 reg;
572
573 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
574 reg &= ~(RDMA_INTR_THRESH_MASK |
575 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
576 reg |= pkts;
577 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
578 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
579 }
580
581 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
582 struct ethtool_coalesce *ec)
583 {
584 struct bcm_sysport_priv *priv = ring->priv;
585 u32 reg;
586
587 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
588 reg &= ~(RING_INTR_THRESH_MASK |
589 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
590 reg |= ec->tx_max_coalesced_frames;
591 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
592 RING_TIMEOUT_SHIFT;
593 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
594 }
595
596 static int bcm_sysport_get_coalesce(struct net_device *dev,
597 struct ethtool_coalesce *ec)
598 {
599 struct bcm_sysport_priv *priv = netdev_priv(dev);
600 u32 reg;
601
602 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
603
604 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
605 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
606
607 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
608
609 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
610 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
611 ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
612
613 return 0;
614 }
615
616 static int bcm_sysport_set_coalesce(struct net_device *dev,
617 struct ethtool_coalesce *ec)
618 {
619 struct bcm_sysport_priv *priv = netdev_priv(dev);
620 struct net_dim_cq_moder moder;
621 u32 usecs, pkts;
622 unsigned int i;
623
624 /* Base system clock is 125Mhz, DMA timeout is this reference clock
625 * divided by 1024, which yield roughly 8.192 us, our maximum value has
626 * to fit in the RING_TIMEOUT_MASK (16 bits).
627 */
628 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
629 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
630 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
631 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
632 return -EINVAL;
633
634 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
635 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
636 ec->use_adaptive_tx_coalesce)
637 return -EINVAL;
638
639 for (i = 0; i < dev->num_tx_queues; i++)
640 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
641
642 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
643 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
644 usecs = priv->rx_coalesce_usecs;
645 pkts = priv->rx_max_coalesced_frames;
646
647 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
648 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
649 usecs = moder.usec;
650 pkts = moder.pkts;
651 }
652
653 priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
654
655 /* Apply desired coalescing parameters */
656 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
657
658 return 0;
659 }
660
661 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
662 {
663 dev_consume_skb_any(cb->skb);
664 cb->skb = NULL;
665 dma_unmap_addr_set(cb, dma_addr, 0);
666 }
667
668 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
669 struct bcm_sysport_cb *cb)
670 {
671 struct device *kdev = &priv->pdev->dev;
672 struct net_device *ndev = priv->netdev;
673 struct sk_buff *skb, *rx_skb;
674 dma_addr_t mapping;
675
676 /* Allocate a new SKB for a new packet */
677 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
678 if (!skb) {
679 priv->mib.alloc_rx_buff_failed++;
680 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
681 return NULL;
682 }
683
684 mapping = dma_map_single(kdev, skb->data,
685 RX_BUF_LENGTH, DMA_FROM_DEVICE);
686 if (dma_mapping_error(kdev, mapping)) {
687 priv->mib.rx_dma_failed++;
688 dev_kfree_skb_any(skb);
689 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
690 return NULL;
691 }
692
693 /* Grab the current SKB on the ring */
694 rx_skb = cb->skb;
695 if (likely(rx_skb))
696 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
697 RX_BUF_LENGTH, DMA_FROM_DEVICE);
698
699 /* Put the new SKB on the ring */
700 cb->skb = skb;
701 dma_unmap_addr_set(cb, dma_addr, mapping);
702 dma_desc_set_addr(priv, cb->bd_addr, mapping);
703
704 netif_dbg(priv, rx_status, ndev, "RX refill\n");
705
706 /* Return the current SKB to the caller */
707 return rx_skb;
708 }
709
710 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
711 {
712 struct bcm_sysport_cb *cb;
713 struct sk_buff *skb;
714 unsigned int i;
715
716 for (i = 0; i < priv->num_rx_bds; i++) {
717 cb = &priv->rx_cbs[i];
718 skb = bcm_sysport_rx_refill(priv, cb);
719 if (skb)
720 dev_kfree_skb(skb);
721 if (!cb->skb)
722 return -ENOMEM;
723 }
724
725 return 0;
726 }
727
728 /* Poll the hardware for up to budget packets to process */
729 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
730 unsigned int budget)
731 {
732 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
733 struct net_device *ndev = priv->netdev;
734 unsigned int processed = 0, to_process;
735 unsigned int processed_bytes = 0;
736 struct bcm_sysport_cb *cb;
737 struct sk_buff *skb;
738 unsigned int p_index;
739 u16 len, status;
740 struct bcm_rsb *rsb;
741
742 /* Clear status before servicing to reduce spurious interrupts */
743 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
744
745 /* Determine how much we should process since last call, SYSTEMPORT Lite
746 * groups the producer and consumer indexes into the same 32-bit
747 * which we access using RDMA_CONS_INDEX
748 */
749 if (!priv->is_lite)
750 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
751 else
752 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
753 p_index &= RDMA_PROD_INDEX_MASK;
754
755 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
756
757 netif_dbg(priv, rx_status, ndev,
758 "p_index=%d rx_c_index=%d to_process=%d\n",
759 p_index, priv->rx_c_index, to_process);
760
761 while ((processed < to_process) && (processed < budget)) {
762 cb = &priv->rx_cbs[priv->rx_read_ptr];
763 skb = bcm_sysport_rx_refill(priv, cb);
764
765
766 /* We do not have a backing SKB, so we do not a corresponding
767 * DMA mapping for this incoming packet since
768 * bcm_sysport_rx_refill always either has both skb and mapping
769 * or none.
770 */
771 if (unlikely(!skb)) {
772 netif_err(priv, rx_err, ndev, "out of memory!\n");
773 ndev->stats.rx_dropped++;
774 ndev->stats.rx_errors++;
775 goto next;
776 }
777
778 /* Extract the Receive Status Block prepended */
779 rsb = (struct bcm_rsb *)skb->data;
780 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
781 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
782 DESC_STATUS_MASK;
783
784 netif_dbg(priv, rx_status, ndev,
785 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
786 p_index, priv->rx_c_index, priv->rx_read_ptr,
787 len, status);
788
789 if (unlikely(len > RX_BUF_LENGTH)) {
790 netif_err(priv, rx_status, ndev, "oversized packet\n");
791 ndev->stats.rx_length_errors++;
792 ndev->stats.rx_errors++;
793 dev_kfree_skb_any(skb);
794 goto next;
795 }
796
797 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
798 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
799 ndev->stats.rx_dropped++;
800 ndev->stats.rx_errors++;
801 dev_kfree_skb_any(skb);
802 goto next;
803 }
804
805 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
806 netif_err(priv, rx_err, ndev, "error packet\n");
807 if (status & RX_STATUS_OVFLOW)
808 ndev->stats.rx_over_errors++;
809 ndev->stats.rx_dropped++;
810 ndev->stats.rx_errors++;
811 dev_kfree_skb_any(skb);
812 goto next;
813 }
814
815 skb_put(skb, len);
816
817 /* Hardware validated our checksum */
818 if (likely(status & DESC_L4_CSUM))
819 skb->ip_summed = CHECKSUM_UNNECESSARY;
820
821 /* Hardware pre-pends packets with 2bytes before Ethernet
822 * header plus we have the Receive Status Block, strip off all
823 * of this from the SKB.
824 */
825 skb_pull(skb, sizeof(*rsb) + 2);
826 len -= (sizeof(*rsb) + 2);
827 processed_bytes += len;
828
829 /* UniMAC may forward CRC */
830 if (priv->crc_fwd) {
831 skb_trim(skb, len - ETH_FCS_LEN);
832 len -= ETH_FCS_LEN;
833 }
834
835 skb->protocol = eth_type_trans(skb, ndev);
836 ndev->stats.rx_packets++;
837 ndev->stats.rx_bytes += len;
838 u64_stats_update_begin(&priv->syncp);
839 stats64->rx_packets++;
840 stats64->rx_bytes += len;
841 u64_stats_update_end(&priv->syncp);
842
843 napi_gro_receive(&priv->napi, skb);
844 next:
845 processed++;
846 priv->rx_read_ptr++;
847
848 if (priv->rx_read_ptr == priv->num_rx_bds)
849 priv->rx_read_ptr = 0;
850 }
851
852 priv->dim.packets = processed;
853 priv->dim.bytes = processed_bytes;
854
855 return processed;
856 }
857
858 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
859 struct bcm_sysport_cb *cb,
860 unsigned int *bytes_compl,
861 unsigned int *pkts_compl)
862 {
863 struct bcm_sysport_priv *priv = ring->priv;
864 struct device *kdev = &priv->pdev->dev;
865
866 if (cb->skb) {
867 *bytes_compl += cb->skb->len;
868 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
869 dma_unmap_len(cb, dma_len),
870 DMA_TO_DEVICE);
871 (*pkts_compl)++;
872 bcm_sysport_free_cb(cb);
873 /* SKB fragment */
874 } else if (dma_unmap_addr(cb, dma_addr)) {
875 *bytes_compl += dma_unmap_len(cb, dma_len);
876 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
877 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
878 dma_unmap_addr_set(cb, dma_addr, 0);
879 }
880 }
881
882 /* Reclaim queued SKBs for transmission completion, lockless version */
883 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
884 struct bcm_sysport_tx_ring *ring)
885 {
886 unsigned int pkts_compl = 0, bytes_compl = 0;
887 struct net_device *ndev = priv->netdev;
888 unsigned int txbds_processed = 0;
889 struct bcm_sysport_cb *cb;
890 unsigned int txbds_ready;
891 unsigned int c_index;
892 u32 hw_ind;
893
894 /* Clear status before servicing to reduce spurious interrupts */
895 if (!ring->priv->is_lite)
896 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
897 else
898 intrl2_0_writel(ring->priv, BIT(ring->index +
899 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
900
901 /* Compute how many descriptors have been processed since last call */
902 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
903 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
904 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
905
906 netif_dbg(priv, tx_done, ndev,
907 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
908 ring->index, ring->c_index, c_index, txbds_ready);
909
910 while (txbds_processed < txbds_ready) {
911 cb = &ring->cbs[ring->clean_index];
912 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
913
914 ring->desc_count++;
915 txbds_processed++;
916
917 if (likely(ring->clean_index < ring->size - 1))
918 ring->clean_index++;
919 else
920 ring->clean_index = 0;
921 }
922
923 u64_stats_update_begin(&priv->syncp);
924 ring->packets += pkts_compl;
925 ring->bytes += bytes_compl;
926 u64_stats_update_end(&priv->syncp);
927
928 ring->c_index = c_index;
929
930 netif_dbg(priv, tx_done, ndev,
931 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
932 ring->index, ring->c_index, pkts_compl, bytes_compl);
933
934 return pkts_compl;
935 }
936
937 /* Locked version of the per-ring TX reclaim routine */
938 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
939 struct bcm_sysport_tx_ring *ring)
940 {
941 struct netdev_queue *txq;
942 unsigned int released;
943 unsigned long flags;
944
945 txq = netdev_get_tx_queue(priv->netdev, ring->index);
946
947 spin_lock_irqsave(&ring->lock, flags);
948 released = __bcm_sysport_tx_reclaim(priv, ring);
949 if (released)
950 netif_tx_wake_queue(txq);
951
952 spin_unlock_irqrestore(&ring->lock, flags);
953
954 return released;
955 }
956
957 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
958 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
959 struct bcm_sysport_tx_ring *ring)
960 {
961 unsigned long flags;
962
963 spin_lock_irqsave(&ring->lock, flags);
964 __bcm_sysport_tx_reclaim(priv, ring);
965 spin_unlock_irqrestore(&ring->lock, flags);
966 }
967
968 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
969 {
970 struct bcm_sysport_tx_ring *ring =
971 container_of(napi, struct bcm_sysport_tx_ring, napi);
972 unsigned int work_done = 0;
973
974 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
975
976 if (work_done == 0) {
977 napi_complete(napi);
978 /* re-enable TX interrupt */
979 if (!ring->priv->is_lite)
980 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
981 else
982 intrl2_0_mask_clear(ring->priv, BIT(ring->index +
983 INTRL2_0_TDMA_MBDONE_SHIFT));
984
985 return 0;
986 }
987
988 return budget;
989 }
990
991 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
992 {
993 unsigned int q;
994
995 for (q = 0; q < priv->netdev->num_tx_queues; q++)
996 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
997 }
998
999 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
1000 {
1001 struct bcm_sysport_priv *priv =
1002 container_of(napi, struct bcm_sysport_priv, napi);
1003 struct net_dim_sample dim_sample;
1004 unsigned int work_done = 0;
1005
1006 work_done = bcm_sysport_desc_rx(priv, budget);
1007
1008 priv->rx_c_index += work_done;
1009 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1010
1011 /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1012 * maintained by HW, but writes to it will be ignore while RDMA
1013 * is active
1014 */
1015 if (!priv->is_lite)
1016 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1017 else
1018 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1019
1020 if (work_done < budget) {
1021 napi_complete_done(napi, work_done);
1022 /* re-enable RX interrupts */
1023 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1024 }
1025
1026 if (priv->dim.use_dim) {
1027 net_dim_sample(priv->dim.event_ctr, priv->dim.packets,
1028 priv->dim.bytes, &dim_sample);
1029 net_dim(&priv->dim.dim, dim_sample);
1030 }
1031
1032 return work_done;
1033 }
1034
1035 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1036 {
1037 u32 reg, bit;
1038
1039 reg = umac_readl(priv, UMAC_MPD_CTRL);
1040 if (enable)
1041 reg |= MPD_EN;
1042 else
1043 reg &= ~MPD_EN;
1044 umac_writel(priv, reg, UMAC_MPD_CTRL);
1045
1046 if (priv->is_lite)
1047 bit = RBUF_ACPI_EN_LITE;
1048 else
1049 bit = RBUF_ACPI_EN;
1050
1051 reg = rbuf_readl(priv, RBUF_CONTROL);
1052 if (enable)
1053 reg |= bit;
1054 else
1055 reg &= ~bit;
1056 rbuf_writel(priv, reg, RBUF_CONTROL);
1057 }
1058
1059 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1060 {
1061 unsigned int index;
1062 u32 reg;
1063
1064 /* Disable RXCHK, active filters and Broadcom tag matching */
1065 reg = rxchk_readl(priv, RXCHK_CONTROL);
1066 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1067 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1068 rxchk_writel(priv, reg, RXCHK_CONTROL);
1069
1070 /* Make sure we restore correct CID index in case HW lost
1071 * its context during deep idle state
1072 */
1073 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1074 rxchk_writel(priv, priv->filters_loc[index] <<
1075 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1076 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1077 }
1078
1079 /* Clear the MagicPacket detection logic */
1080 mpd_enable_set(priv, false);
1081
1082 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1083 if (reg & INTRL2_0_MPD)
1084 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1085
1086 if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1087 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1088 RXCHK_BRCM_TAG_MATCH_MASK;
1089 netdev_info(priv->netdev,
1090 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1091 }
1092
1093 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1094 }
1095
1096 static void bcm_sysport_dim_work(struct work_struct *work)
1097 {
1098 struct net_dim *dim = container_of(work, struct net_dim, work);
1099 struct bcm_sysport_net_dim *ndim =
1100 container_of(dim, struct bcm_sysport_net_dim, dim);
1101 struct bcm_sysport_priv *priv =
1102 container_of(ndim, struct bcm_sysport_priv, dim);
1103 struct net_dim_cq_moder cur_profile =
1104 net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1105
1106 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1107 dim->state = NET_DIM_START_MEASURE;
1108 }
1109
1110 /* RX and misc interrupt routine */
1111 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1112 {
1113 struct net_device *dev = dev_id;
1114 struct bcm_sysport_priv *priv = netdev_priv(dev);
1115 struct bcm_sysport_tx_ring *txr;
1116 unsigned int ring, ring_bit;
1117
1118 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1119 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1120 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1121
1122 if (unlikely(priv->irq0_stat == 0)) {
1123 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1124 return IRQ_NONE;
1125 }
1126
1127 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1128 priv->dim.event_ctr++;
1129 if (likely(napi_schedule_prep(&priv->napi))) {
1130 /* disable RX interrupts */
1131 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1132 __napi_schedule_irqoff(&priv->napi);
1133 }
1134 }
1135
1136 /* TX ring is full, perform a full reclaim since we do not know
1137 * which one would trigger this interrupt
1138 */
1139 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1140 bcm_sysport_tx_reclaim_all(priv);
1141
1142 if (!priv->is_lite)
1143 goto out;
1144
1145 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1146 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1147 if (!(priv->irq0_stat & ring_bit))
1148 continue;
1149
1150 txr = &priv->tx_rings[ring];
1151
1152 if (likely(napi_schedule_prep(&txr->napi))) {
1153 intrl2_0_mask_set(priv, ring_bit);
1154 __napi_schedule(&txr->napi);
1155 }
1156 }
1157 out:
1158 return IRQ_HANDLED;
1159 }
1160
1161 /* TX interrupt service routine */
1162 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1163 {
1164 struct net_device *dev = dev_id;
1165 struct bcm_sysport_priv *priv = netdev_priv(dev);
1166 struct bcm_sysport_tx_ring *txr;
1167 unsigned int ring;
1168
1169 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1170 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1171 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1172
1173 if (unlikely(priv->irq1_stat == 0)) {
1174 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1175 return IRQ_NONE;
1176 }
1177
1178 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1179 if (!(priv->irq1_stat & BIT(ring)))
1180 continue;
1181
1182 txr = &priv->tx_rings[ring];
1183
1184 if (likely(napi_schedule_prep(&txr->napi))) {
1185 intrl2_1_mask_set(priv, BIT(ring));
1186 __napi_schedule_irqoff(&txr->napi);
1187 }
1188 }
1189
1190 return IRQ_HANDLED;
1191 }
1192
1193 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1194 {
1195 struct bcm_sysport_priv *priv = dev_id;
1196
1197 pm_wakeup_event(&priv->pdev->dev, 0);
1198
1199 return IRQ_HANDLED;
1200 }
1201
1202 #ifdef CONFIG_NET_POLL_CONTROLLER
1203 static void bcm_sysport_poll_controller(struct net_device *dev)
1204 {
1205 struct bcm_sysport_priv *priv = netdev_priv(dev);
1206
1207 disable_irq(priv->irq0);
1208 bcm_sysport_rx_isr(priv->irq0, priv);
1209 enable_irq(priv->irq0);
1210
1211 if (!priv->is_lite) {
1212 disable_irq(priv->irq1);
1213 bcm_sysport_tx_isr(priv->irq1, priv);
1214 enable_irq(priv->irq1);
1215 }
1216 }
1217 #endif
1218
1219 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1220 struct net_device *dev)
1221 {
1222 struct bcm_sysport_priv *priv = netdev_priv(dev);
1223 struct sk_buff *nskb;
1224 struct bcm_tsb *tsb;
1225 u32 csum_info;
1226 u8 ip_proto;
1227 u16 csum_start;
1228 __be16 ip_ver;
1229
1230 /* Re-allocate SKB if needed */
1231 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1232 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1233 if (!nskb) {
1234 dev_kfree_skb_any(skb);
1235 priv->mib.tx_realloc_tsb_failed++;
1236 dev->stats.tx_errors++;
1237 dev->stats.tx_dropped++;
1238 return NULL;
1239 }
1240 dev_consume_skb_any(skb);
1241 skb = nskb;
1242 priv->mib.tx_realloc_tsb++;
1243 }
1244
1245 tsb = skb_push(skb, sizeof(*tsb));
1246 /* Zero-out TSB by default */
1247 memset(tsb, 0, sizeof(*tsb));
1248
1249 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1250 ip_ver = skb->protocol;
1251 switch (ip_ver) {
1252 case htons(ETH_P_IP):
1253 ip_proto = ip_hdr(skb)->protocol;
1254 break;
1255 case htons(ETH_P_IPV6):
1256 ip_proto = ipv6_hdr(skb)->nexthdr;
1257 break;
1258 default:
1259 return skb;
1260 }
1261
1262 /* Get the checksum offset and the L4 (transport) offset */
1263 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1264 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1265 csum_info |= (csum_start << L4_PTR_SHIFT);
1266
1267 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1268 csum_info |= L4_LENGTH_VALID;
1269 if (ip_proto == IPPROTO_UDP &&
1270 ip_ver == htons(ETH_P_IP))
1271 csum_info |= L4_UDP;
1272 } else {
1273 csum_info = 0;
1274 }
1275
1276 tsb->l4_ptr_dest_map = csum_info;
1277 }
1278
1279 return skb;
1280 }
1281
1282 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1283 struct net_device *dev)
1284 {
1285 struct bcm_sysport_priv *priv = netdev_priv(dev);
1286 struct device *kdev = &priv->pdev->dev;
1287 struct bcm_sysport_tx_ring *ring;
1288 struct bcm_sysport_cb *cb;
1289 struct netdev_queue *txq;
1290 struct dma_desc *desc;
1291 unsigned int skb_len;
1292 unsigned long flags;
1293 dma_addr_t mapping;
1294 u32 len_status;
1295 u16 queue;
1296 int ret;
1297
1298 queue = skb_get_queue_mapping(skb);
1299 txq = netdev_get_tx_queue(dev, queue);
1300 ring = &priv->tx_rings[queue];
1301
1302 /* lock against tx reclaim in BH context and TX ring full interrupt */
1303 spin_lock_irqsave(&ring->lock, flags);
1304 if (unlikely(ring->desc_count == 0)) {
1305 netif_tx_stop_queue(txq);
1306 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1307 ret = NETDEV_TX_BUSY;
1308 goto out;
1309 }
1310
1311 /* Insert TSB and checksum infos */
1312 if (priv->tsb_en) {
1313 skb = bcm_sysport_insert_tsb(skb, dev);
1314 if (!skb) {
1315 ret = NETDEV_TX_OK;
1316 goto out;
1317 }
1318 }
1319
1320 skb_len = skb->len;
1321
1322 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1323 if (dma_mapping_error(kdev, mapping)) {
1324 priv->mib.tx_dma_failed++;
1325 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1326 skb->data, skb_len);
1327 ret = NETDEV_TX_OK;
1328 goto out;
1329 }
1330
1331 /* Remember the SKB for future freeing */
1332 cb = &ring->cbs[ring->curr_desc];
1333 cb->skb = skb;
1334 dma_unmap_addr_set(cb, dma_addr, mapping);
1335 dma_unmap_len_set(cb, dma_len, skb_len);
1336
1337 /* Fetch a descriptor entry from our pool */
1338 desc = ring->desc_cpu;
1339
1340 desc->addr_lo = lower_32_bits(mapping);
1341 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1342 len_status |= (skb_len << DESC_LEN_SHIFT);
1343 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1344 DESC_STATUS_SHIFT;
1345 if (skb->ip_summed == CHECKSUM_PARTIAL)
1346 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1347
1348 ring->curr_desc++;
1349 if (ring->curr_desc == ring->size)
1350 ring->curr_desc = 0;
1351 ring->desc_count--;
1352
1353 /* Ensure write completion of the descriptor status/length
1354 * in DRAM before the System Port WRITE_PORT register latches
1355 * the value
1356 */
1357 wmb();
1358 desc->addr_status_len = len_status;
1359 wmb();
1360
1361 /* Write this descriptor address to the RING write port */
1362 tdma_port_write_desc_addr(priv, desc, ring->index);
1363
1364 /* Check ring space and update SW control flow */
1365 if (ring->desc_count == 0)
1366 netif_tx_stop_queue(txq);
1367
1368 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1369 ring->index, ring->desc_count, ring->curr_desc);
1370
1371 ret = NETDEV_TX_OK;
1372 out:
1373 spin_unlock_irqrestore(&ring->lock, flags);
1374 return ret;
1375 }
1376
1377 static void bcm_sysport_tx_timeout(struct net_device *dev)
1378 {
1379 netdev_warn(dev, "transmit timeout!\n");
1380
1381 netif_trans_update(dev);
1382 dev->stats.tx_errors++;
1383
1384 netif_tx_wake_all_queues(dev);
1385 }
1386
1387 /* phylib adjust link callback */
1388 static void bcm_sysport_adj_link(struct net_device *dev)
1389 {
1390 struct bcm_sysport_priv *priv = netdev_priv(dev);
1391 struct phy_device *phydev = dev->phydev;
1392 unsigned int changed = 0;
1393 u32 cmd_bits = 0, reg;
1394
1395 if (priv->old_link != phydev->link) {
1396 changed = 1;
1397 priv->old_link = phydev->link;
1398 }
1399
1400 if (priv->old_duplex != phydev->duplex) {
1401 changed = 1;
1402 priv->old_duplex = phydev->duplex;
1403 }
1404
1405 if (priv->is_lite)
1406 goto out;
1407
1408 switch (phydev->speed) {
1409 case SPEED_2500:
1410 cmd_bits = CMD_SPEED_2500;
1411 break;
1412 case SPEED_1000:
1413 cmd_bits = CMD_SPEED_1000;
1414 break;
1415 case SPEED_100:
1416 cmd_bits = CMD_SPEED_100;
1417 break;
1418 case SPEED_10:
1419 cmd_bits = CMD_SPEED_10;
1420 break;
1421 default:
1422 break;
1423 }
1424 cmd_bits <<= CMD_SPEED_SHIFT;
1425
1426 if (phydev->duplex == DUPLEX_HALF)
1427 cmd_bits |= CMD_HD_EN;
1428
1429 if (priv->old_pause != phydev->pause) {
1430 changed = 1;
1431 priv->old_pause = phydev->pause;
1432 }
1433
1434 if (!phydev->pause)
1435 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1436
1437 if (!changed)
1438 return;
1439
1440 if (phydev->link) {
1441 reg = umac_readl(priv, UMAC_CMD);
1442 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1443 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1444 CMD_TX_PAUSE_IGNORE);
1445 reg |= cmd_bits;
1446 umac_writel(priv, reg, UMAC_CMD);
1447 }
1448 out:
1449 if (changed)
1450 phy_print_status(phydev);
1451 }
1452
1453 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1454 void (*cb)(struct work_struct *work))
1455 {
1456 struct bcm_sysport_net_dim *dim = &priv->dim;
1457
1458 INIT_WORK(&dim->dim.work, cb);
1459 dim->dim.mode = NET_DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1460 dim->event_ctr = 0;
1461 dim->packets = 0;
1462 dim->bytes = 0;
1463 }
1464
1465 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1466 {
1467 struct bcm_sysport_net_dim *dim = &priv->dim;
1468 struct net_dim_cq_moder moder;
1469 u32 usecs, pkts;
1470
1471 usecs = priv->rx_coalesce_usecs;
1472 pkts = priv->rx_max_coalesced_frames;
1473
1474 /* If DIM was enabled, re-apply default parameters */
1475 if (dim->use_dim) {
1476 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1477 usecs = moder.usec;
1478 pkts = moder.pkts;
1479 }
1480
1481 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1482 }
1483
1484 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1485 unsigned int index)
1486 {
1487 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1488 struct device *kdev = &priv->pdev->dev;
1489 size_t size;
1490 void *p;
1491 u32 reg;
1492
1493 /* Simple descriptors partitioning for now */
1494 size = 256;
1495
1496 /* We just need one DMA descriptor which is DMA-able, since writing to
1497 * the port will allocate a new descriptor in its internal linked-list
1498 */
1499 p = dma_alloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1500 GFP_KERNEL);
1501 if (!p) {
1502 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1503 return -ENOMEM;
1504 }
1505
1506 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1507 if (!ring->cbs) {
1508 dma_free_coherent(kdev, sizeof(struct dma_desc),
1509 ring->desc_cpu, ring->desc_dma);
1510 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1511 return -ENOMEM;
1512 }
1513
1514 /* Initialize SW view of the ring */
1515 spin_lock_init(&ring->lock);
1516 ring->priv = priv;
1517 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1518 ring->index = index;
1519 ring->size = size;
1520 ring->clean_index = 0;
1521 ring->alloc_size = ring->size;
1522 ring->desc_cpu = p;
1523 ring->desc_count = ring->size;
1524 ring->curr_desc = 0;
1525
1526 /* Initialize HW ring */
1527 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1528 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1529 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1530 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1531
1532 /* Configure QID and port mapping */
1533 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1534 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1535 if (ring->inspect) {
1536 reg |= ring->switch_queue & RING_QID_MASK;
1537 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1538 } else {
1539 reg |= RING_IGNORE_STATUS;
1540 }
1541 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1542 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1543
1544 /* Enable ACB algorithm 2 */
1545 reg = tdma_readl(priv, TDMA_CONTROL);
1546 reg |= tdma_control_bit(priv, ACB_ALGO);
1547 tdma_writel(priv, reg, TDMA_CONTROL);
1548
1549 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1550 * with the original definition of ACB_ALGO
1551 */
1552 reg = tdma_readl(priv, TDMA_CONTROL);
1553 if (priv->is_lite)
1554 reg &= ~BIT(TSB_SWAP1);
1555 /* Set a correct TSB format based on host endian */
1556 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1557 reg |= tdma_control_bit(priv, TSB_SWAP0);
1558 else
1559 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1560 tdma_writel(priv, reg, TDMA_CONTROL);
1561
1562 /* Program the number of descriptors as MAX_THRESHOLD and half of
1563 * its size for the hysteresis trigger
1564 */
1565 tdma_writel(priv, ring->size |
1566 1 << RING_HYST_THRESH_SHIFT,
1567 TDMA_DESC_RING_MAX_HYST(index));
1568
1569 /* Enable the ring queue in the arbiter */
1570 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1571 reg |= (1 << index);
1572 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1573
1574 napi_enable(&ring->napi);
1575
1576 netif_dbg(priv, hw, priv->netdev,
1577 "TDMA cfg, size=%d, desc_cpu=%p switch q=%d,port=%d\n",
1578 ring->size, ring->desc_cpu, ring->switch_queue,
1579 ring->switch_port);
1580
1581 return 0;
1582 }
1583
1584 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1585 unsigned int index)
1586 {
1587 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1588 struct device *kdev = &priv->pdev->dev;
1589 u32 reg;
1590
1591 /* Caller should stop the TDMA engine */
1592 reg = tdma_readl(priv, TDMA_STATUS);
1593 if (!(reg & TDMA_DISABLED))
1594 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1595
1596 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1597 * fail, so by checking this pointer we know whether the TX ring was
1598 * fully initialized or not.
1599 */
1600 if (!ring->cbs)
1601 return;
1602
1603 napi_disable(&ring->napi);
1604 netif_napi_del(&ring->napi);
1605
1606 bcm_sysport_tx_clean(priv, ring);
1607
1608 kfree(ring->cbs);
1609 ring->cbs = NULL;
1610
1611 if (ring->desc_dma) {
1612 dma_free_coherent(kdev, sizeof(struct dma_desc),
1613 ring->desc_cpu, ring->desc_dma);
1614 ring->desc_dma = 0;
1615 }
1616 ring->size = 0;
1617 ring->alloc_size = 0;
1618
1619 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1620 }
1621
1622 /* RDMA helper */
1623 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1624 unsigned int enable)
1625 {
1626 unsigned int timeout = 1000;
1627 u32 reg;
1628
1629 reg = rdma_readl(priv, RDMA_CONTROL);
1630 if (enable)
1631 reg |= RDMA_EN;
1632 else
1633 reg &= ~RDMA_EN;
1634 rdma_writel(priv, reg, RDMA_CONTROL);
1635
1636 /* Poll for RMDA disabling completion */
1637 do {
1638 reg = rdma_readl(priv, RDMA_STATUS);
1639 if (!!(reg & RDMA_DISABLED) == !enable)
1640 return 0;
1641 usleep_range(1000, 2000);
1642 } while (timeout-- > 0);
1643
1644 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1645
1646 return -ETIMEDOUT;
1647 }
1648
1649 /* TDMA helper */
1650 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1651 unsigned int enable)
1652 {
1653 unsigned int timeout = 1000;
1654 u32 reg;
1655
1656 reg = tdma_readl(priv, TDMA_CONTROL);
1657 if (enable)
1658 reg |= tdma_control_bit(priv, TDMA_EN);
1659 else
1660 reg &= ~tdma_control_bit(priv, TDMA_EN);
1661 tdma_writel(priv, reg, TDMA_CONTROL);
1662
1663 /* Poll for TMDA disabling completion */
1664 do {
1665 reg = tdma_readl(priv, TDMA_STATUS);
1666 if (!!(reg & TDMA_DISABLED) == !enable)
1667 return 0;
1668
1669 usleep_range(1000, 2000);
1670 } while (timeout-- > 0);
1671
1672 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1673
1674 return -ETIMEDOUT;
1675 }
1676
1677 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1678 {
1679 struct bcm_sysport_cb *cb;
1680 u32 reg;
1681 int ret;
1682 int i;
1683
1684 /* Initialize SW view of the RX ring */
1685 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1686 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1687 priv->rx_c_index = 0;
1688 priv->rx_read_ptr = 0;
1689 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1690 GFP_KERNEL);
1691 if (!priv->rx_cbs) {
1692 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1693 return -ENOMEM;
1694 }
1695
1696 for (i = 0; i < priv->num_rx_bds; i++) {
1697 cb = priv->rx_cbs + i;
1698 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1699 }
1700
1701 ret = bcm_sysport_alloc_rx_bufs(priv);
1702 if (ret) {
1703 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1704 return ret;
1705 }
1706
1707 /* Initialize HW, ensure RDMA is disabled */
1708 reg = rdma_readl(priv, RDMA_STATUS);
1709 if (!(reg & RDMA_DISABLED))
1710 rdma_enable_set(priv, 0);
1711
1712 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1713 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1714 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1715 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1716 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1717 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1718 /* Operate the queue in ring mode */
1719 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1720 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1721 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1722 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1723
1724 netif_dbg(priv, hw, priv->netdev,
1725 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1726 priv->num_rx_bds, priv->rx_bds);
1727
1728 return 0;
1729 }
1730
1731 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1732 {
1733 struct bcm_sysport_cb *cb;
1734 unsigned int i;
1735 u32 reg;
1736
1737 /* Caller should ensure RDMA is disabled */
1738 reg = rdma_readl(priv, RDMA_STATUS);
1739 if (!(reg & RDMA_DISABLED))
1740 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1741
1742 for (i = 0; i < priv->num_rx_bds; i++) {
1743 cb = &priv->rx_cbs[i];
1744 if (dma_unmap_addr(cb, dma_addr))
1745 dma_unmap_single(&priv->pdev->dev,
1746 dma_unmap_addr(cb, dma_addr),
1747 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1748 bcm_sysport_free_cb(cb);
1749 }
1750
1751 kfree(priv->rx_cbs);
1752 priv->rx_cbs = NULL;
1753
1754 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1755 }
1756
1757 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1758 {
1759 struct bcm_sysport_priv *priv = netdev_priv(dev);
1760 u32 reg;
1761
1762 if (priv->is_lite)
1763 return;
1764
1765 reg = umac_readl(priv, UMAC_CMD);
1766 if (dev->flags & IFF_PROMISC)
1767 reg |= CMD_PROMISC;
1768 else
1769 reg &= ~CMD_PROMISC;
1770 umac_writel(priv, reg, UMAC_CMD);
1771
1772 /* No support for ALLMULTI */
1773 if (dev->flags & IFF_ALLMULTI)
1774 return;
1775 }
1776
1777 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1778 u32 mask, unsigned int enable)
1779 {
1780 u32 reg;
1781
1782 if (!priv->is_lite) {
1783 reg = umac_readl(priv, UMAC_CMD);
1784 if (enable)
1785 reg |= mask;
1786 else
1787 reg &= ~mask;
1788 umac_writel(priv, reg, UMAC_CMD);
1789 } else {
1790 reg = gib_readl(priv, GIB_CONTROL);
1791 if (enable)
1792 reg |= mask;
1793 else
1794 reg &= ~mask;
1795 gib_writel(priv, reg, GIB_CONTROL);
1796 }
1797
1798 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1799 * to be processed (1 msec).
1800 */
1801 if (enable == 0)
1802 usleep_range(1000, 2000);
1803 }
1804
1805 static inline void umac_reset(struct bcm_sysport_priv *priv)
1806 {
1807 u32 reg;
1808
1809 if (priv->is_lite)
1810 return;
1811
1812 reg = umac_readl(priv, UMAC_CMD);
1813 reg |= CMD_SW_RESET;
1814 umac_writel(priv, reg, UMAC_CMD);
1815 udelay(10);
1816 reg = umac_readl(priv, UMAC_CMD);
1817 reg &= ~CMD_SW_RESET;
1818 umac_writel(priv, reg, UMAC_CMD);
1819 }
1820
1821 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1822 unsigned char *addr)
1823 {
1824 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1825 addr[3];
1826 u32 mac1 = (addr[4] << 8) | addr[5];
1827
1828 if (!priv->is_lite) {
1829 umac_writel(priv, mac0, UMAC_MAC0);
1830 umac_writel(priv, mac1, UMAC_MAC1);
1831 } else {
1832 gib_writel(priv, mac0, GIB_MAC0);
1833 gib_writel(priv, mac1, GIB_MAC1);
1834 }
1835 }
1836
1837 static void topctrl_flush(struct bcm_sysport_priv *priv)
1838 {
1839 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1840 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1841 mdelay(1);
1842 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1843 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1844 }
1845
1846 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1847 {
1848 struct bcm_sysport_priv *priv = netdev_priv(dev);
1849 struct sockaddr *addr = p;
1850
1851 if (!is_valid_ether_addr(addr->sa_data))
1852 return -EINVAL;
1853
1854 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1855
1856 /* interface is disabled, changes to MAC will be reflected on next
1857 * open call
1858 */
1859 if (!netif_running(dev))
1860 return 0;
1861
1862 umac_set_hw_addr(priv, dev->dev_addr);
1863
1864 return 0;
1865 }
1866
1867 static void bcm_sysport_get_stats64(struct net_device *dev,
1868 struct rtnl_link_stats64 *stats)
1869 {
1870 struct bcm_sysport_priv *priv = netdev_priv(dev);
1871 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1872 unsigned int start;
1873
1874 netdev_stats_to_stats64(stats, &dev->stats);
1875
1876 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1877 &stats->tx_packets);
1878
1879 do {
1880 start = u64_stats_fetch_begin_irq(&priv->syncp);
1881 stats->rx_packets = stats64->rx_packets;
1882 stats->rx_bytes = stats64->rx_bytes;
1883 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1884 }
1885
1886 static void bcm_sysport_netif_start(struct net_device *dev)
1887 {
1888 struct bcm_sysport_priv *priv = netdev_priv(dev);
1889
1890 /* Enable NAPI */
1891 bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1892 bcm_sysport_init_rx_coalesce(priv);
1893 napi_enable(&priv->napi);
1894
1895 /* Enable RX interrupt and TX ring full interrupt */
1896 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1897
1898 phy_start(dev->phydev);
1899
1900 /* Enable TX interrupts for the TXQs */
1901 if (!priv->is_lite)
1902 intrl2_1_mask_clear(priv, 0xffffffff);
1903 else
1904 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1905 }
1906
1907 static void rbuf_init(struct bcm_sysport_priv *priv)
1908 {
1909 u32 reg;
1910
1911 reg = rbuf_readl(priv, RBUF_CONTROL);
1912 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1913 /* Set a correct RSB format on SYSTEMPORT Lite */
1914 if (priv->is_lite)
1915 reg &= ~RBUF_RSB_SWAP1;
1916
1917 /* Set a correct RSB format based on host endian */
1918 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1919 reg |= RBUF_RSB_SWAP0;
1920 else
1921 reg &= ~RBUF_RSB_SWAP0;
1922 rbuf_writel(priv, reg, RBUF_CONTROL);
1923 }
1924
1925 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1926 {
1927 intrl2_0_mask_set(priv, 0xffffffff);
1928 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1929 if (!priv->is_lite) {
1930 intrl2_1_mask_set(priv, 0xffffffff);
1931 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1932 }
1933 }
1934
1935 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1936 {
1937 u32 reg;
1938
1939 reg = gib_readl(priv, GIB_CONTROL);
1940 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1941 if (netdev_uses_dsa(priv->netdev)) {
1942 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1943 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1944 }
1945 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1946 reg |= 12 << GIB_IPG_LEN_SHIFT;
1947 gib_writel(priv, reg, GIB_CONTROL);
1948 }
1949
1950 static int bcm_sysport_open(struct net_device *dev)
1951 {
1952 struct bcm_sysport_priv *priv = netdev_priv(dev);
1953 struct phy_device *phydev;
1954 unsigned int i;
1955 int ret;
1956
1957 /* Reset UniMAC */
1958 umac_reset(priv);
1959
1960 /* Flush TX and RX FIFOs at TOPCTRL level */
1961 topctrl_flush(priv);
1962
1963 /* Disable the UniMAC RX/TX */
1964 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1965
1966 /* Enable RBUF 2bytes alignment and Receive Status Block */
1967 rbuf_init(priv);
1968
1969 /* Set maximum frame length */
1970 if (!priv->is_lite)
1971 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1972 else
1973 gib_set_pad_extension(priv);
1974
1975 /* Apply features again in case we changed them while interface was
1976 * down
1977 */
1978 bcm_sysport_set_features(dev, dev->features);
1979
1980 /* Set MAC address */
1981 umac_set_hw_addr(priv, dev->dev_addr);
1982
1983 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1984 0, priv->phy_interface);
1985 if (!phydev) {
1986 netdev_err(dev, "could not attach to PHY\n");
1987 return -ENODEV;
1988 }
1989
1990 /* Reset house keeping link status */
1991 priv->old_duplex = -1;
1992 priv->old_link = -1;
1993 priv->old_pause = -1;
1994
1995 /* mask all interrupts and request them */
1996 bcm_sysport_mask_all_intrs(priv);
1997
1998 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1999 if (ret) {
2000 netdev_err(dev, "failed to request RX interrupt\n");
2001 goto out_phy_disconnect;
2002 }
2003
2004 if (!priv->is_lite) {
2005 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
2006 dev->name, dev);
2007 if (ret) {
2008 netdev_err(dev, "failed to request TX interrupt\n");
2009 goto out_free_irq0;
2010 }
2011 }
2012
2013 /* Initialize both hardware and software ring */
2014 for (i = 0; i < dev->num_tx_queues; i++) {
2015 ret = bcm_sysport_init_tx_ring(priv, i);
2016 if (ret) {
2017 netdev_err(dev, "failed to initialize TX ring %d\n",
2018 i);
2019 goto out_free_tx_ring;
2020 }
2021 }
2022
2023 /* Initialize linked-list */
2024 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2025
2026 /* Initialize RX ring */
2027 ret = bcm_sysport_init_rx_ring(priv);
2028 if (ret) {
2029 netdev_err(dev, "failed to initialize RX ring\n");
2030 goto out_free_rx_ring;
2031 }
2032
2033 /* Turn on RDMA */
2034 ret = rdma_enable_set(priv, 1);
2035 if (ret)
2036 goto out_free_rx_ring;
2037
2038 /* Turn on TDMA */
2039 ret = tdma_enable_set(priv, 1);
2040 if (ret)
2041 goto out_clear_rx_int;
2042
2043 /* Turn on UniMAC TX/RX */
2044 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2045
2046 bcm_sysport_netif_start(dev);
2047
2048 netif_tx_start_all_queues(dev);
2049
2050 return 0;
2051
2052 out_clear_rx_int:
2053 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2054 out_free_rx_ring:
2055 bcm_sysport_fini_rx_ring(priv);
2056 out_free_tx_ring:
2057 for (i = 0; i < dev->num_tx_queues; i++)
2058 bcm_sysport_fini_tx_ring(priv, i);
2059 if (!priv->is_lite)
2060 free_irq(priv->irq1, dev);
2061 out_free_irq0:
2062 free_irq(priv->irq0, dev);
2063 out_phy_disconnect:
2064 phy_disconnect(phydev);
2065 return ret;
2066 }
2067
2068 static void bcm_sysport_netif_stop(struct net_device *dev)
2069 {
2070 struct bcm_sysport_priv *priv = netdev_priv(dev);
2071
2072 /* stop all software from updating hardware */
2073 netif_tx_disable(dev);
2074 napi_disable(&priv->napi);
2075 cancel_work_sync(&priv->dim.dim.work);
2076 phy_stop(dev->phydev);
2077
2078 /* mask all interrupts */
2079 bcm_sysport_mask_all_intrs(priv);
2080 }
2081
2082 static int bcm_sysport_stop(struct net_device *dev)
2083 {
2084 struct bcm_sysport_priv *priv = netdev_priv(dev);
2085 unsigned int i;
2086 int ret;
2087
2088 bcm_sysport_netif_stop(dev);
2089
2090 /* Disable UniMAC RX */
2091 umac_enable_set(priv, CMD_RX_EN, 0);
2092
2093 ret = tdma_enable_set(priv, 0);
2094 if (ret) {
2095 netdev_err(dev, "timeout disabling RDMA\n");
2096 return ret;
2097 }
2098
2099 /* Wait for a maximum packet size to be drained */
2100 usleep_range(2000, 3000);
2101
2102 ret = rdma_enable_set(priv, 0);
2103 if (ret) {
2104 netdev_err(dev, "timeout disabling TDMA\n");
2105 return ret;
2106 }
2107
2108 /* Disable UniMAC TX */
2109 umac_enable_set(priv, CMD_TX_EN, 0);
2110
2111 /* Free RX/TX rings SW structures */
2112 for (i = 0; i < dev->num_tx_queues; i++)
2113 bcm_sysport_fini_tx_ring(priv, i);
2114 bcm_sysport_fini_rx_ring(priv);
2115
2116 free_irq(priv->irq0, dev);
2117 if (!priv->is_lite)
2118 free_irq(priv->irq1, dev);
2119
2120 /* Disconnect from PHY */
2121 phy_disconnect(dev->phydev);
2122
2123 return 0;
2124 }
2125
2126 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2127 u64 location)
2128 {
2129 unsigned int index;
2130 u32 reg;
2131
2132 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2133 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2134 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2135 reg &= RXCHK_BRCM_TAG_CID_MASK;
2136 if (reg == location)
2137 return index;
2138 }
2139
2140 return -EINVAL;
2141 }
2142
2143 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2144 struct ethtool_rxnfc *nfc)
2145 {
2146 int index;
2147
2148 /* This is not a rule that we know about */
2149 index = bcm_sysport_rule_find(priv, nfc->fs.location);
2150 if (index < 0)
2151 return -EOPNOTSUPP;
2152
2153 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2154
2155 return 0;
2156 }
2157
2158 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2159 struct ethtool_rxnfc *nfc)
2160 {
2161 unsigned int index;
2162 u32 reg;
2163
2164 /* We cannot match locations greater than what the classification ID
2165 * permits (256 entries)
2166 */
2167 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2168 return -E2BIG;
2169
2170 /* We cannot support flows that are not destined for a wake-up */
2171 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2172 return -EOPNOTSUPP;
2173
2174 /* All filters are already in use, we cannot match more rules */
2175 if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2176 RXCHK_BRCM_TAG_MAX)
2177 return -ENOSPC;
2178
2179 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2180 if (index > RXCHK_BRCM_TAG_MAX)
2181 return -ENOSPC;
2182
2183 /* Location is the classification ID, and index is the position
2184 * within one of our 8 possible filters to be programmed
2185 */
2186 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2187 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2188 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2189 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2190 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2191
2192 priv->filters_loc[index] = nfc->fs.location;
2193 set_bit(index, priv->filters);
2194
2195 return 0;
2196 }
2197
2198 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2199 u64 location)
2200 {
2201 int index;
2202
2203 /* This is not a rule that we know about */
2204 index = bcm_sysport_rule_find(priv, location);
2205 if (index < 0)
2206 return -EOPNOTSUPP;
2207
2208 /* No need to disable this filter if it was enabled, this will
2209 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2210 */
2211 clear_bit(index, priv->filters);
2212 priv->filters_loc[index] = 0;
2213
2214 return 0;
2215 }
2216
2217 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2218 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2219 {
2220 struct bcm_sysport_priv *priv = netdev_priv(dev);
2221 int ret = -EOPNOTSUPP;
2222
2223 switch (nfc->cmd) {
2224 case ETHTOOL_GRXCLSRULE:
2225 ret = bcm_sysport_rule_get(priv, nfc);
2226 break;
2227 default:
2228 break;
2229 }
2230
2231 return ret;
2232 }
2233
2234 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2235 struct ethtool_rxnfc *nfc)
2236 {
2237 struct bcm_sysport_priv *priv = netdev_priv(dev);
2238 int ret = -EOPNOTSUPP;
2239
2240 switch (nfc->cmd) {
2241 case ETHTOOL_SRXCLSRLINS:
2242 ret = bcm_sysport_rule_set(priv, nfc);
2243 break;
2244 case ETHTOOL_SRXCLSRLDEL:
2245 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2246 break;
2247 default:
2248 break;
2249 }
2250
2251 return ret;
2252 }
2253
2254 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2255 .get_drvinfo = bcm_sysport_get_drvinfo,
2256 .get_msglevel = bcm_sysport_get_msglvl,
2257 .set_msglevel = bcm_sysport_set_msglvl,
2258 .get_link = ethtool_op_get_link,
2259 .get_strings = bcm_sysport_get_strings,
2260 .get_ethtool_stats = bcm_sysport_get_stats,
2261 .get_sset_count = bcm_sysport_get_sset_count,
2262 .get_wol = bcm_sysport_get_wol,
2263 .set_wol = bcm_sysport_set_wol,
2264 .get_coalesce = bcm_sysport_get_coalesce,
2265 .set_coalesce = bcm_sysport_set_coalesce,
2266 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2267 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2268 .get_rxnfc = bcm_sysport_get_rxnfc,
2269 .set_rxnfc = bcm_sysport_set_rxnfc,
2270 };
2271
2272 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2273 struct net_device *sb_dev,
2274 select_queue_fallback_t fallback)
2275 {
2276 struct bcm_sysport_priv *priv = netdev_priv(dev);
2277 u16 queue = skb_get_queue_mapping(skb);
2278 struct bcm_sysport_tx_ring *tx_ring;
2279 unsigned int q, port;
2280
2281 if (!netdev_uses_dsa(dev))
2282 return fallback(dev, skb, NULL);
2283
2284 /* DSA tagging layer will have configured the correct queue */
2285 q = BRCM_TAG_GET_QUEUE(queue);
2286 port = BRCM_TAG_GET_PORT(queue);
2287 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2288
2289 if (unlikely(!tx_ring))
2290 return fallback(dev, skb, NULL);
2291
2292 return tx_ring->index;
2293 }
2294
2295 static const struct net_device_ops bcm_sysport_netdev_ops = {
2296 .ndo_start_xmit = bcm_sysport_xmit,
2297 .ndo_tx_timeout = bcm_sysport_tx_timeout,
2298 .ndo_open = bcm_sysport_open,
2299 .ndo_stop = bcm_sysport_stop,
2300 .ndo_set_features = bcm_sysport_set_features,
2301 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
2302 .ndo_set_mac_address = bcm_sysport_change_mac,
2303 #ifdef CONFIG_NET_POLL_CONTROLLER
2304 .ndo_poll_controller = bcm_sysport_poll_controller,
2305 #endif
2306 .ndo_get_stats64 = bcm_sysport_get_stats64,
2307 .ndo_select_queue = bcm_sysport_select_queue,
2308 };
2309
2310 static int bcm_sysport_map_queues(struct notifier_block *nb,
2311 struct dsa_notifier_register_info *info)
2312 {
2313 struct bcm_sysport_tx_ring *ring;
2314 struct bcm_sysport_priv *priv;
2315 struct net_device *slave_dev;
2316 unsigned int num_tx_queues;
2317 unsigned int q, qp, port;
2318 struct net_device *dev;
2319
2320 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2321 if (priv->netdev != info->master)
2322 return 0;
2323
2324 dev = info->master;
2325
2326 /* We can't be setting up queue inspection for non directly attached
2327 * switches
2328 */
2329 if (info->switch_number)
2330 return 0;
2331
2332 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2333 return 0;
2334
2335 port = info->port_number;
2336 slave_dev = info->info.dev;
2337
2338 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2339 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2340 * per-port (slave_dev) network devices queue, we achieve just that.
2341 * This need to happen now before any slave network device is used such
2342 * it accurately reflects the number of real TX queues.
2343 */
2344 if (priv->is_lite)
2345 netif_set_real_num_tx_queues(slave_dev,
2346 slave_dev->num_tx_queues / 2);
2347
2348 num_tx_queues = slave_dev->real_num_tx_queues;
2349
2350 if (priv->per_port_num_tx_queues &&
2351 priv->per_port_num_tx_queues != num_tx_queues)
2352 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2353
2354 priv->per_port_num_tx_queues = num_tx_queues;
2355
2356 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2357 q++) {
2358 ring = &priv->tx_rings[q];
2359
2360 if (ring->inspect)
2361 continue;
2362
2363 /* Just remember the mapping actual programming done
2364 * during bcm_sysport_init_tx_ring
2365 */
2366 ring->switch_queue = qp;
2367 ring->switch_port = port;
2368 ring->inspect = true;
2369 priv->ring_map[q + port * num_tx_queues] = ring;
2370 qp++;
2371 }
2372
2373 return 0;
2374 }
2375
2376 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2377 struct dsa_notifier_register_info *info)
2378 {
2379 struct bcm_sysport_tx_ring *ring;
2380 struct bcm_sysport_priv *priv;
2381 struct net_device *slave_dev;
2382 unsigned int num_tx_queues;
2383 struct net_device *dev;
2384 unsigned int q, port;
2385
2386 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2387 if (priv->netdev != info->master)
2388 return 0;
2389
2390 dev = info->master;
2391
2392 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2393 return 0;
2394
2395 port = info->port_number;
2396 slave_dev = info->info.dev;
2397
2398 num_tx_queues = slave_dev->real_num_tx_queues;
2399
2400 for (q = 0; q < dev->num_tx_queues; q++) {
2401 ring = &priv->tx_rings[q];
2402
2403 if (ring->switch_port != port)
2404 continue;
2405
2406 if (!ring->inspect)
2407 continue;
2408
2409 ring->inspect = false;
2410 priv->ring_map[q + port * num_tx_queues] = NULL;
2411 }
2412
2413 return 0;
2414 }
2415
2416 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2417 unsigned long event, void *ptr)
2418 {
2419 int ret = NOTIFY_DONE;
2420
2421 switch (event) {
2422 case DSA_PORT_REGISTER:
2423 ret = bcm_sysport_map_queues(nb, ptr);
2424 break;
2425 case DSA_PORT_UNREGISTER:
2426 ret = bcm_sysport_unmap_queues(nb, ptr);
2427 break;
2428 }
2429
2430 return notifier_from_errno(ret);
2431 }
2432
2433 #define REV_FMT "v%2x.%02x"
2434
2435 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2436 [SYSTEMPORT] = {
2437 .is_lite = false,
2438 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2439 },
2440 [SYSTEMPORT_LITE] = {
2441 .is_lite = true,
2442 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2443 },
2444 };
2445
2446 static const struct of_device_id bcm_sysport_of_match[] = {
2447 { .compatible = "brcm,systemportlite-v1.00",
2448 .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2449 { .compatible = "brcm,systemport-v1.00",
2450 .data = &bcm_sysport_params[SYSTEMPORT] },
2451 { .compatible = "brcm,systemport",
2452 .data = &bcm_sysport_params[SYSTEMPORT] },
2453 { /* sentinel */ }
2454 };
2455 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2456
2457 static int bcm_sysport_probe(struct platform_device *pdev)
2458 {
2459 const struct bcm_sysport_hw_params *params;
2460 const struct of_device_id *of_id = NULL;
2461 struct bcm_sysport_priv *priv;
2462 struct device_node *dn;
2463 struct net_device *dev;
2464 const void *macaddr;
2465 struct resource *r;
2466 u32 txq, rxq;
2467 int ret;
2468
2469 dn = pdev->dev.of_node;
2470 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2471 of_id = of_match_node(bcm_sysport_of_match, dn);
2472 if (!of_id || !of_id->data)
2473 return -EINVAL;
2474
2475 /* Fairly quickly we need to know the type of adapter we have */
2476 params = of_id->data;
2477
2478 /* Read the Transmit/Receive Queue properties */
2479 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2480 txq = TDMA_NUM_RINGS;
2481 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2482 rxq = 1;
2483
2484 /* Sanity check the number of transmit queues */
2485 if (!txq || txq > TDMA_NUM_RINGS)
2486 return -EINVAL;
2487
2488 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2489 if (!dev)
2490 return -ENOMEM;
2491
2492 /* Initialize private members */
2493 priv = netdev_priv(dev);
2494
2495 /* Allocate number of TX rings */
2496 priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2497 sizeof(struct bcm_sysport_tx_ring),
2498 GFP_KERNEL);
2499 if (!priv->tx_rings)
2500 return -ENOMEM;
2501
2502 priv->is_lite = params->is_lite;
2503 priv->num_rx_desc_words = params->num_rx_desc_words;
2504
2505 priv->irq0 = platform_get_irq(pdev, 0);
2506 if (!priv->is_lite) {
2507 priv->irq1 = platform_get_irq(pdev, 1);
2508 priv->wol_irq = platform_get_irq(pdev, 2);
2509 } else {
2510 priv->wol_irq = platform_get_irq(pdev, 1);
2511 }
2512 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2513 dev_err(&pdev->dev, "invalid interrupts\n");
2514 ret = -EINVAL;
2515 goto err_free_netdev;
2516 }
2517
2518 priv->base = devm_ioremap_resource(&pdev->dev, r);
2519 if (IS_ERR(priv->base)) {
2520 ret = PTR_ERR(priv->base);
2521 goto err_free_netdev;
2522 }
2523
2524 priv->netdev = dev;
2525 priv->pdev = pdev;
2526
2527 priv->phy_interface = of_get_phy_mode(dn);
2528 /* Default to GMII interface mode */
2529 if (priv->phy_interface < 0)
2530 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2531
2532 /* In the case of a fixed PHY, the DT node associated
2533 * to the PHY is the Ethernet MAC DT node.
2534 */
2535 if (of_phy_is_fixed_link(dn)) {
2536 ret = of_phy_register_fixed_link(dn);
2537 if (ret) {
2538 dev_err(&pdev->dev, "failed to register fixed PHY\n");
2539 goto err_free_netdev;
2540 }
2541
2542 priv->phy_dn = dn;
2543 }
2544
2545 /* Initialize netdevice members */
2546 macaddr = of_get_mac_address(dn);
2547 if (!macaddr || !is_valid_ether_addr(macaddr)) {
2548 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2549 eth_hw_addr_random(dev);
2550 } else {
2551 ether_addr_copy(dev->dev_addr, macaddr);
2552 }
2553
2554 SET_NETDEV_DEV(dev, &pdev->dev);
2555 dev_set_drvdata(&pdev->dev, dev);
2556 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2557 dev->netdev_ops = &bcm_sysport_netdev_ops;
2558 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2559
2560 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2561 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2562 dev->hw_features |= dev->features;
2563 dev->vlan_features |= dev->features;
2564
2565 /* Request the WOL interrupt and advertise suspend if available */
2566 priv->wol_irq_disabled = 1;
2567 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2568 bcm_sysport_wol_isr, 0, dev->name, priv);
2569 if (!ret)
2570 device_set_wakeup_capable(&pdev->dev, 1);
2571
2572 /* Set the needed headroom once and for all */
2573 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2574 dev->needed_headroom += sizeof(struct bcm_tsb);
2575
2576 /* libphy will adjust the link state accordingly */
2577 netif_carrier_off(dev);
2578
2579 priv->rx_max_coalesced_frames = 1;
2580 u64_stats_init(&priv->syncp);
2581
2582 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2583
2584 ret = register_dsa_notifier(&priv->dsa_notifier);
2585 if (ret) {
2586 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2587 goto err_deregister_fixed_link;
2588 }
2589
2590 ret = register_netdev(dev);
2591 if (ret) {
2592 dev_err(&pdev->dev, "failed to register net_device\n");
2593 goto err_deregister_notifier;
2594 }
2595
2596 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2597 dev_info(&pdev->dev,
2598 "Broadcom SYSTEMPORT%s" REV_FMT
2599 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2600 priv->is_lite ? " Lite" : "",
2601 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2602 priv->base, priv->irq0, priv->irq1, txq, rxq);
2603
2604 return 0;
2605
2606 err_deregister_notifier:
2607 unregister_dsa_notifier(&priv->dsa_notifier);
2608 err_deregister_fixed_link:
2609 if (of_phy_is_fixed_link(dn))
2610 of_phy_deregister_fixed_link(dn);
2611 err_free_netdev:
2612 free_netdev(dev);
2613 return ret;
2614 }
2615
2616 static int bcm_sysport_remove(struct platform_device *pdev)
2617 {
2618 struct net_device *dev = dev_get_drvdata(&pdev->dev);
2619 struct bcm_sysport_priv *priv = netdev_priv(dev);
2620 struct device_node *dn = pdev->dev.of_node;
2621
2622 /* Not much to do, ndo_close has been called
2623 * and we use managed allocations
2624 */
2625 unregister_dsa_notifier(&priv->dsa_notifier);
2626 unregister_netdev(dev);
2627 if (of_phy_is_fixed_link(dn))
2628 of_phy_deregister_fixed_link(dn);
2629 free_netdev(dev);
2630 dev_set_drvdata(&pdev->dev, NULL);
2631
2632 return 0;
2633 }
2634
2635 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2636 {
2637 struct net_device *ndev = priv->netdev;
2638 unsigned int timeout = 1000;
2639 unsigned int index, i = 0;
2640 u32 reg;
2641
2642 reg = umac_readl(priv, UMAC_MPD_CTRL);
2643 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2644 reg |= MPD_EN;
2645 reg &= ~PSW_EN;
2646 if (priv->wolopts & WAKE_MAGICSECURE) {
2647 /* Program the SecureOn password */
2648 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2649 UMAC_PSW_MS);
2650 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2651 UMAC_PSW_LS);
2652 reg |= PSW_EN;
2653 }
2654 umac_writel(priv, reg, UMAC_MPD_CTRL);
2655
2656 if (priv->wolopts & WAKE_FILTER) {
2657 /* Turn on ACPI matching to steal packets from RBUF */
2658 reg = rbuf_readl(priv, RBUF_CONTROL);
2659 if (priv->is_lite)
2660 reg |= RBUF_ACPI_EN_LITE;
2661 else
2662 reg |= RBUF_ACPI_EN;
2663 rbuf_writel(priv, reg, RBUF_CONTROL);
2664
2665 /* Enable RXCHK, active filters and Broadcom tag matching */
2666 reg = rxchk_readl(priv, RXCHK_CONTROL);
2667 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2668 RXCHK_BRCM_TAG_MATCH_SHIFT);
2669 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2670 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2671 i++;
2672 }
2673 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2674 rxchk_writel(priv, reg, RXCHK_CONTROL);
2675 }
2676
2677 /* Make sure RBUF entered WoL mode as result */
2678 do {
2679 reg = rbuf_readl(priv, RBUF_STATUS);
2680 if (reg & RBUF_WOL_MODE)
2681 break;
2682
2683 udelay(10);
2684 } while (timeout-- > 0);
2685
2686 /* Do not leave the UniMAC RBUF matching only MPD packets */
2687 if (!timeout) {
2688 mpd_enable_set(priv, false);
2689 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2690 return -ETIMEDOUT;
2691 }
2692
2693 /* UniMAC receive needs to be turned on */
2694 umac_enable_set(priv, CMD_RX_EN, 1);
2695
2696 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2697
2698 return 0;
2699 }
2700
2701 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2702 {
2703 struct net_device *dev = dev_get_drvdata(d);
2704 struct bcm_sysport_priv *priv = netdev_priv(dev);
2705 unsigned int i;
2706 int ret = 0;
2707 u32 reg;
2708
2709 if (!netif_running(dev))
2710 return 0;
2711
2712 netif_device_detach(dev);
2713
2714 bcm_sysport_netif_stop(dev);
2715
2716 phy_suspend(dev->phydev);
2717
2718 /* Disable UniMAC RX */
2719 umac_enable_set(priv, CMD_RX_EN, 0);
2720
2721 ret = rdma_enable_set(priv, 0);
2722 if (ret) {
2723 netdev_err(dev, "RDMA timeout!\n");
2724 return ret;
2725 }
2726
2727 /* Disable RXCHK if enabled */
2728 if (priv->rx_chk_en) {
2729 reg = rxchk_readl(priv, RXCHK_CONTROL);
2730 reg &= ~RXCHK_EN;
2731 rxchk_writel(priv, reg, RXCHK_CONTROL);
2732 }
2733
2734 /* Flush RX pipe */
2735 if (!priv->wolopts)
2736 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2737
2738 ret = tdma_enable_set(priv, 0);
2739 if (ret) {
2740 netdev_err(dev, "TDMA timeout!\n");
2741 return ret;
2742 }
2743
2744 /* Wait for a packet boundary */
2745 usleep_range(2000, 3000);
2746
2747 umac_enable_set(priv, CMD_TX_EN, 0);
2748
2749 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2750
2751 /* Free RX/TX rings SW structures */
2752 for (i = 0; i < dev->num_tx_queues; i++)
2753 bcm_sysport_fini_tx_ring(priv, i);
2754 bcm_sysport_fini_rx_ring(priv);
2755
2756 /* Get prepared for Wake-on-LAN */
2757 if (device_may_wakeup(d) && priv->wolopts)
2758 ret = bcm_sysport_suspend_to_wol(priv);
2759
2760 return ret;
2761 }
2762
2763 static int __maybe_unused bcm_sysport_resume(struct device *d)
2764 {
2765 struct net_device *dev = dev_get_drvdata(d);
2766 struct bcm_sysport_priv *priv = netdev_priv(dev);
2767 unsigned int i;
2768 int ret;
2769
2770 if (!netif_running(dev))
2771 return 0;
2772
2773 umac_reset(priv);
2774
2775 /* We may have been suspended and never received a WOL event that
2776 * would turn off MPD detection, take care of that now
2777 */
2778 bcm_sysport_resume_from_wol(priv);
2779
2780 /* Initialize both hardware and software ring */
2781 for (i = 0; i < dev->num_tx_queues; i++) {
2782 ret = bcm_sysport_init_tx_ring(priv, i);
2783 if (ret) {
2784 netdev_err(dev, "failed to initialize TX ring %d\n",
2785 i);
2786 goto out_free_tx_rings;
2787 }
2788 }
2789
2790 /* Initialize linked-list */
2791 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2792
2793 /* Initialize RX ring */
2794 ret = bcm_sysport_init_rx_ring(priv);
2795 if (ret) {
2796 netdev_err(dev, "failed to initialize RX ring\n");
2797 goto out_free_rx_ring;
2798 }
2799
2800 /* RX pipe enable */
2801 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2802
2803 ret = rdma_enable_set(priv, 1);
2804 if (ret) {
2805 netdev_err(dev, "failed to enable RDMA\n");
2806 goto out_free_rx_ring;
2807 }
2808
2809 /* Restore enabled features */
2810 bcm_sysport_set_features(dev, dev->features);
2811
2812 rbuf_init(priv);
2813
2814 /* Set maximum frame length */
2815 if (!priv->is_lite)
2816 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2817 else
2818 gib_set_pad_extension(priv);
2819
2820 /* Set MAC address */
2821 umac_set_hw_addr(priv, dev->dev_addr);
2822
2823 umac_enable_set(priv, CMD_RX_EN, 1);
2824
2825 /* TX pipe enable */
2826 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2827
2828 umac_enable_set(priv, CMD_TX_EN, 1);
2829
2830 ret = tdma_enable_set(priv, 1);
2831 if (ret) {
2832 netdev_err(dev, "TDMA timeout!\n");
2833 goto out_free_rx_ring;
2834 }
2835
2836 phy_resume(dev->phydev);
2837
2838 bcm_sysport_netif_start(dev);
2839
2840 netif_device_attach(dev);
2841
2842 return 0;
2843
2844 out_free_rx_ring:
2845 bcm_sysport_fini_rx_ring(priv);
2846 out_free_tx_rings:
2847 for (i = 0; i < dev->num_tx_queues; i++)
2848 bcm_sysport_fini_tx_ring(priv, i);
2849 return ret;
2850 }
2851
2852 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2853 bcm_sysport_suspend, bcm_sysport_resume);
2854
2855 static struct platform_driver bcm_sysport_driver = {
2856 .probe = bcm_sysport_probe,
2857 .remove = bcm_sysport_remove,
2858 .driver = {
2859 .name = "brcm-systemport",
2860 .of_match_table = bcm_sysport_of_match,
2861 .pm = &bcm_sysport_pm_ops,
2862 },
2863 };
2864 module_platform_driver(bcm_sysport_driver);
2865
2866 MODULE_AUTHOR("Broadcom Corporation");
2867 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2868 MODULE_ALIAS("platform:brcm-systemport");
2869 MODULE_LICENSE("GPL");
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