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UBUNTU: Ubuntu-5.3.0-29.31
[mirror_ubuntu-eoan-kernel.git] / drivers / net / ethernet / broadcom / bcmsysport.c
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 reg = tdma_readl(priv, TDMA_CONTROL);
165 if (priv->tsb_en)
166 reg |= tdma_control_bit(priv, TSB_EN);
167 else
168 reg &= ~tdma_control_bit(priv, TSB_EN);
169 tdma_writel(priv, reg, TDMA_CONTROL);
170 }
171
172 static int bcm_sysport_set_features(struct net_device *dev,
173 netdev_features_t features)
174 {
175 struct bcm_sysport_priv *priv = netdev_priv(dev);
176
177 /* Read CRC forward */
178 if (!priv->is_lite)
179 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
180 else
181 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
182 GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
183
184 bcm_sysport_set_rx_csum(dev, features);
185 bcm_sysport_set_tx_csum(dev, features);
186
187 return 0;
188 }
189
190 /* Hardware counters must be kept in sync because the order/offset
191 * is important here (order in structure declaration = order in hardware)
192 */
193 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
194 /* general stats */
195 STAT_NETDEV64(rx_packets),
196 STAT_NETDEV64(tx_packets),
197 STAT_NETDEV64(rx_bytes),
198 STAT_NETDEV64(tx_bytes),
199 STAT_NETDEV(rx_errors),
200 STAT_NETDEV(tx_errors),
201 STAT_NETDEV(rx_dropped),
202 STAT_NETDEV(tx_dropped),
203 STAT_NETDEV(multicast),
204 /* UniMAC RSV counters */
205 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
206 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
207 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
208 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
209 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
210 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
211 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
212 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
213 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
214 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
215 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
216 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
217 STAT_MIB_RX("rx_multicast", mib.rx.mca),
218 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
219 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
220 STAT_MIB_RX("rx_control", mib.rx.cf),
221 STAT_MIB_RX("rx_pause", mib.rx.pf),
222 STAT_MIB_RX("rx_unknown", mib.rx.uo),
223 STAT_MIB_RX("rx_align", mib.rx.aln),
224 STAT_MIB_RX("rx_outrange", mib.rx.flr),
225 STAT_MIB_RX("rx_code", mib.rx.cde),
226 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
227 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
228 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
229 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
230 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
231 STAT_MIB_RX("rx_unicast", mib.rx.uc),
232 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
233 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
234 /* UniMAC TSV counters */
235 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
236 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
237 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
238 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
239 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
240 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
241 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
242 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
243 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
244 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
245 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
246 STAT_MIB_TX("tx_multicast", mib.tx.mca),
247 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
248 STAT_MIB_TX("tx_pause", mib.tx.pf),
249 STAT_MIB_TX("tx_control", mib.tx.cf),
250 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
251 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
252 STAT_MIB_TX("tx_defer", mib.tx.drf),
253 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
254 STAT_MIB_TX("tx_single_col", mib.tx.scl),
255 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
256 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
257 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
258 STAT_MIB_TX("tx_frags", mib.tx.frg),
259 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
260 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
261 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
262 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
263 STAT_MIB_TX("tx_unicast", mib.tx.uc),
264 /* UniMAC RUNT counters */
265 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
266 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
267 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
268 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
269 /* RXCHK misc statistics */
270 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
271 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
272 RXCHK_OTHER_DISC_CNTR),
273 /* RBUF misc statistics */
274 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
275 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
276 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
277 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
278 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
279 STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
280 STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
281 /* Per TX-queue statistics are dynamically appended */
282 };
283
284 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
285
286 static void bcm_sysport_get_drvinfo(struct net_device *dev,
287 struct ethtool_drvinfo *info)
288 {
289 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
290 strlcpy(info->version, "0.1", sizeof(info->version));
291 strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
292 }
293
294 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
295 {
296 struct bcm_sysport_priv *priv = netdev_priv(dev);
297
298 return priv->msg_enable;
299 }
300
301 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
302 {
303 struct bcm_sysport_priv *priv = netdev_priv(dev);
304
305 priv->msg_enable = enable;
306 }
307
308 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
309 {
310 switch (type) {
311 case BCM_SYSPORT_STAT_NETDEV:
312 case BCM_SYSPORT_STAT_NETDEV64:
313 case BCM_SYSPORT_STAT_RXCHK:
314 case BCM_SYSPORT_STAT_RBUF:
315 case BCM_SYSPORT_STAT_SOFT:
316 return true;
317 default:
318 return false;
319 }
320 }
321
322 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
323 {
324 struct bcm_sysport_priv *priv = netdev_priv(dev);
325 const struct bcm_sysport_stats *s;
326 unsigned int i, j;
327
328 switch (string_set) {
329 case ETH_SS_STATS:
330 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
331 s = &bcm_sysport_gstrings_stats[i];
332 if (priv->is_lite &&
333 !bcm_sysport_lite_stat_valid(s->type))
334 continue;
335 j++;
336 }
337 /* Include per-queue statistics */
338 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
339 default:
340 return -EOPNOTSUPP;
341 }
342 }
343
344 static void bcm_sysport_get_strings(struct net_device *dev,
345 u32 stringset, u8 *data)
346 {
347 struct bcm_sysport_priv *priv = netdev_priv(dev);
348 const struct bcm_sysport_stats *s;
349 char buf[128];
350 int i, j;
351
352 switch (stringset) {
353 case ETH_SS_STATS:
354 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
355 s = &bcm_sysport_gstrings_stats[i];
356 if (priv->is_lite &&
357 !bcm_sysport_lite_stat_valid(s->type))
358 continue;
359
360 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
361 ETH_GSTRING_LEN);
362 j++;
363 }
364
365 for (i = 0; i < dev->num_tx_queues; i++) {
366 snprintf(buf, sizeof(buf), "txq%d_packets", i);
367 memcpy(data + j * ETH_GSTRING_LEN, buf,
368 ETH_GSTRING_LEN);
369 j++;
370
371 snprintf(buf, sizeof(buf), "txq%d_bytes", i);
372 memcpy(data + j * ETH_GSTRING_LEN, buf,
373 ETH_GSTRING_LEN);
374 j++;
375 }
376 break;
377 default:
378 break;
379 }
380 }
381
382 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
383 {
384 int i, j = 0;
385
386 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
387 const struct bcm_sysport_stats *s;
388 u8 offset = 0;
389 u32 val = 0;
390 char *p;
391
392 s = &bcm_sysport_gstrings_stats[i];
393 switch (s->type) {
394 case BCM_SYSPORT_STAT_NETDEV:
395 case BCM_SYSPORT_STAT_NETDEV64:
396 case BCM_SYSPORT_STAT_SOFT:
397 continue;
398 case BCM_SYSPORT_STAT_MIB_RX:
399 case BCM_SYSPORT_STAT_MIB_TX:
400 case BCM_SYSPORT_STAT_RUNT:
401 if (priv->is_lite)
402 continue;
403
404 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
405 offset = UMAC_MIB_STAT_OFFSET;
406 val = umac_readl(priv, UMAC_MIB_START + j + offset);
407 break;
408 case BCM_SYSPORT_STAT_RXCHK:
409 val = rxchk_readl(priv, s->reg_offset);
410 if (val == ~0)
411 rxchk_writel(priv, 0, s->reg_offset);
412 break;
413 case BCM_SYSPORT_STAT_RBUF:
414 val = rbuf_readl(priv, s->reg_offset);
415 if (val == ~0)
416 rbuf_writel(priv, 0, s->reg_offset);
417 break;
418 }
419
420 j += s->stat_sizeof;
421 p = (char *)priv + s->stat_offset;
422 *(u32 *)p = val;
423 }
424
425 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
426 }
427
428 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
429 u64 *tx_bytes, u64 *tx_packets)
430 {
431 struct bcm_sysport_tx_ring *ring;
432 u64 bytes = 0, packets = 0;
433 unsigned int start;
434 unsigned int q;
435
436 for (q = 0; q < priv->netdev->num_tx_queues; q++) {
437 ring = &priv->tx_rings[q];
438 do {
439 start = u64_stats_fetch_begin_irq(&priv->syncp);
440 bytes = ring->bytes;
441 packets = ring->packets;
442 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
443
444 *tx_bytes += bytes;
445 *tx_packets += packets;
446 }
447 }
448
449 static void bcm_sysport_get_stats(struct net_device *dev,
450 struct ethtool_stats *stats, u64 *data)
451 {
452 struct bcm_sysport_priv *priv = netdev_priv(dev);
453 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
454 struct u64_stats_sync *syncp = &priv->syncp;
455 struct bcm_sysport_tx_ring *ring;
456 u64 tx_bytes = 0, tx_packets = 0;
457 unsigned int start;
458 int i, j;
459
460 if (netif_running(dev)) {
461 bcm_sysport_update_mib_counters(priv);
462 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
463 stats64->tx_bytes = tx_bytes;
464 stats64->tx_packets = tx_packets;
465 }
466
467 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
468 const struct bcm_sysport_stats *s;
469 char *p;
470
471 s = &bcm_sysport_gstrings_stats[i];
472 if (s->type == BCM_SYSPORT_STAT_NETDEV)
473 p = (char *)&dev->stats;
474 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
475 p = (char *)stats64;
476 else
477 p = (char *)priv;
478
479 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
480 continue;
481 p += s->stat_offset;
482
483 if (s->stat_sizeof == sizeof(u64) &&
484 s->type == BCM_SYSPORT_STAT_NETDEV64) {
485 do {
486 start = u64_stats_fetch_begin_irq(syncp);
487 data[i] = *(u64 *)p;
488 } while (u64_stats_fetch_retry_irq(syncp, start));
489 } else
490 data[i] = *(u32 *)p;
491 j++;
492 }
493
494 /* For SYSTEMPORT Lite since we have holes in our statistics, j would
495 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
496 * needs to point to how many total statistics we have minus the
497 * number of per TX queue statistics
498 */
499 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
500 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
501
502 for (i = 0; i < dev->num_tx_queues; i++) {
503 ring = &priv->tx_rings[i];
504 data[j] = ring->packets;
505 j++;
506 data[j] = ring->bytes;
507 j++;
508 }
509 }
510
511 static void bcm_sysport_get_wol(struct net_device *dev,
512 struct ethtool_wolinfo *wol)
513 {
514 struct bcm_sysport_priv *priv = netdev_priv(dev);
515
516 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
517 wol->wolopts = priv->wolopts;
518
519 if (!(priv->wolopts & WAKE_MAGICSECURE))
520 return;
521
522 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
523 }
524
525 static int bcm_sysport_set_wol(struct net_device *dev,
526 struct ethtool_wolinfo *wol)
527 {
528 struct bcm_sysport_priv *priv = netdev_priv(dev);
529 struct device *kdev = &priv->pdev->dev;
530 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
531
532 if (!device_can_wakeup(kdev))
533 return -ENOTSUPP;
534
535 if (wol->wolopts & ~supported)
536 return -EINVAL;
537
538 if (wol->wolopts & WAKE_MAGICSECURE)
539 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
540
541 /* Flag the device and relevant IRQ as wakeup capable */
542 if (wol->wolopts) {
543 device_set_wakeup_enable(kdev, 1);
544 if (priv->wol_irq_disabled)
545 enable_irq_wake(priv->wol_irq);
546 priv->wol_irq_disabled = 0;
547 } else {
548 device_set_wakeup_enable(kdev, 0);
549 /* Avoid unbalanced disable_irq_wake calls */
550 if (!priv->wol_irq_disabled)
551 disable_irq_wake(priv->wol_irq);
552 priv->wol_irq_disabled = 1;
553 }
554
555 priv->wolopts = wol->wolopts;
556
557 return 0;
558 }
559
560 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
561 u32 usecs, u32 pkts)
562 {
563 u32 reg;
564
565 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
566 reg &= ~(RDMA_INTR_THRESH_MASK |
567 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
568 reg |= pkts;
569 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
570 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
571 }
572
573 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
574 struct ethtool_coalesce *ec)
575 {
576 struct bcm_sysport_priv *priv = ring->priv;
577 u32 reg;
578
579 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
580 reg &= ~(RING_INTR_THRESH_MASK |
581 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
582 reg |= ec->tx_max_coalesced_frames;
583 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
584 RING_TIMEOUT_SHIFT;
585 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
586 }
587
588 static int bcm_sysport_get_coalesce(struct net_device *dev,
589 struct ethtool_coalesce *ec)
590 {
591 struct bcm_sysport_priv *priv = netdev_priv(dev);
592 u32 reg;
593
594 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
595
596 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
597 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
598
599 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
600
601 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
602 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
603 ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
604
605 return 0;
606 }
607
608 static int bcm_sysport_set_coalesce(struct net_device *dev,
609 struct ethtool_coalesce *ec)
610 {
611 struct bcm_sysport_priv *priv = netdev_priv(dev);
612 struct dim_cq_moder moder;
613 u32 usecs, pkts;
614 unsigned int i;
615
616 /* Base system clock is 125Mhz, DMA timeout is this reference clock
617 * divided by 1024, which yield roughly 8.192 us, our maximum value has
618 * to fit in the RING_TIMEOUT_MASK (16 bits).
619 */
620 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
621 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
622 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
623 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
624 return -EINVAL;
625
626 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
627 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
628 ec->use_adaptive_tx_coalesce)
629 return -EINVAL;
630
631 for (i = 0; i < dev->num_tx_queues; i++)
632 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
633
634 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
635 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
636 usecs = priv->rx_coalesce_usecs;
637 pkts = priv->rx_max_coalesced_frames;
638
639 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
640 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
641 usecs = moder.usec;
642 pkts = moder.pkts;
643 }
644
645 priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
646
647 /* Apply desired coalescing parameters */
648 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
649
650 return 0;
651 }
652
653 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
654 {
655 dev_consume_skb_any(cb->skb);
656 cb->skb = NULL;
657 dma_unmap_addr_set(cb, dma_addr, 0);
658 }
659
660 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
661 struct bcm_sysport_cb *cb)
662 {
663 struct device *kdev = &priv->pdev->dev;
664 struct net_device *ndev = priv->netdev;
665 struct sk_buff *skb, *rx_skb;
666 dma_addr_t mapping;
667
668 /* Allocate a new SKB for a new packet */
669 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
670 if (!skb) {
671 priv->mib.alloc_rx_buff_failed++;
672 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
673 return NULL;
674 }
675
676 mapping = dma_map_single(kdev, skb->data,
677 RX_BUF_LENGTH, DMA_FROM_DEVICE);
678 if (dma_mapping_error(kdev, mapping)) {
679 priv->mib.rx_dma_failed++;
680 dev_kfree_skb_any(skb);
681 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
682 return NULL;
683 }
684
685 /* Grab the current SKB on the ring */
686 rx_skb = cb->skb;
687 if (likely(rx_skb))
688 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
689 RX_BUF_LENGTH, DMA_FROM_DEVICE);
690
691 /* Put the new SKB on the ring */
692 cb->skb = skb;
693 dma_unmap_addr_set(cb, dma_addr, mapping);
694 dma_desc_set_addr(priv, cb->bd_addr, mapping);
695
696 netif_dbg(priv, rx_status, ndev, "RX refill\n");
697
698 /* Return the current SKB to the caller */
699 return rx_skb;
700 }
701
702 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
703 {
704 struct bcm_sysport_cb *cb;
705 struct sk_buff *skb;
706 unsigned int i;
707
708 for (i = 0; i < priv->num_rx_bds; i++) {
709 cb = &priv->rx_cbs[i];
710 skb = bcm_sysport_rx_refill(priv, cb);
711 if (skb)
712 dev_kfree_skb(skb);
713 if (!cb->skb)
714 return -ENOMEM;
715 }
716
717 return 0;
718 }
719
720 /* Poll the hardware for up to budget packets to process */
721 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
722 unsigned int budget)
723 {
724 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
725 struct net_device *ndev = priv->netdev;
726 unsigned int processed = 0, to_process;
727 unsigned int processed_bytes = 0;
728 struct bcm_sysport_cb *cb;
729 struct sk_buff *skb;
730 unsigned int p_index;
731 u16 len, status;
732 struct bcm_rsb *rsb;
733
734 /* Clear status before servicing to reduce spurious interrupts */
735 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
736
737 /* Determine how much we should process since last call, SYSTEMPORT Lite
738 * groups the producer and consumer indexes into the same 32-bit
739 * which we access using RDMA_CONS_INDEX
740 */
741 if (!priv->is_lite)
742 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
743 else
744 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
745 p_index &= RDMA_PROD_INDEX_MASK;
746
747 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
748
749 netif_dbg(priv, rx_status, ndev,
750 "p_index=%d rx_c_index=%d to_process=%d\n",
751 p_index, priv->rx_c_index, to_process);
752
753 while ((processed < to_process) && (processed < budget)) {
754 cb = &priv->rx_cbs[priv->rx_read_ptr];
755 skb = bcm_sysport_rx_refill(priv, cb);
756
757
758 /* We do not have a backing SKB, so we do not a corresponding
759 * DMA mapping for this incoming packet since
760 * bcm_sysport_rx_refill always either has both skb and mapping
761 * or none.
762 */
763 if (unlikely(!skb)) {
764 netif_err(priv, rx_err, ndev, "out of memory!\n");
765 ndev->stats.rx_dropped++;
766 ndev->stats.rx_errors++;
767 goto next;
768 }
769
770 /* Extract the Receive Status Block prepended */
771 rsb = (struct bcm_rsb *)skb->data;
772 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
773 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
774 DESC_STATUS_MASK;
775
776 netif_dbg(priv, rx_status, ndev,
777 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
778 p_index, priv->rx_c_index, priv->rx_read_ptr,
779 len, status);
780
781 if (unlikely(len > RX_BUF_LENGTH)) {
782 netif_err(priv, rx_status, ndev, "oversized packet\n");
783 ndev->stats.rx_length_errors++;
784 ndev->stats.rx_errors++;
785 dev_kfree_skb_any(skb);
786 goto next;
787 }
788
789 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
790 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
791 ndev->stats.rx_dropped++;
792 ndev->stats.rx_errors++;
793 dev_kfree_skb_any(skb);
794 goto next;
795 }
796
797 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
798 netif_err(priv, rx_err, ndev, "error packet\n");
799 if (status & RX_STATUS_OVFLOW)
800 ndev->stats.rx_over_errors++;
801 ndev->stats.rx_dropped++;
802 ndev->stats.rx_errors++;
803 dev_kfree_skb_any(skb);
804 goto next;
805 }
806
807 skb_put(skb, len);
808
809 /* Hardware validated our checksum */
810 if (likely(status & DESC_L4_CSUM))
811 skb->ip_summed = CHECKSUM_UNNECESSARY;
812
813 /* Hardware pre-pends packets with 2bytes before Ethernet
814 * header plus we have the Receive Status Block, strip off all
815 * of this from the SKB.
816 */
817 skb_pull(skb, sizeof(*rsb) + 2);
818 len -= (sizeof(*rsb) + 2);
819 processed_bytes += len;
820
821 /* UniMAC may forward CRC */
822 if (priv->crc_fwd) {
823 skb_trim(skb, len - ETH_FCS_LEN);
824 len -= ETH_FCS_LEN;
825 }
826
827 skb->protocol = eth_type_trans(skb, ndev);
828 ndev->stats.rx_packets++;
829 ndev->stats.rx_bytes += len;
830 u64_stats_update_begin(&priv->syncp);
831 stats64->rx_packets++;
832 stats64->rx_bytes += len;
833 u64_stats_update_end(&priv->syncp);
834
835 napi_gro_receive(&priv->napi, skb);
836 next:
837 processed++;
838 priv->rx_read_ptr++;
839
840 if (priv->rx_read_ptr == priv->num_rx_bds)
841 priv->rx_read_ptr = 0;
842 }
843
844 priv->dim.packets = processed;
845 priv->dim.bytes = processed_bytes;
846
847 return processed;
848 }
849
850 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
851 struct bcm_sysport_cb *cb,
852 unsigned int *bytes_compl,
853 unsigned int *pkts_compl)
854 {
855 struct bcm_sysport_priv *priv = ring->priv;
856 struct device *kdev = &priv->pdev->dev;
857
858 if (cb->skb) {
859 *bytes_compl += cb->skb->len;
860 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
861 dma_unmap_len(cb, dma_len),
862 DMA_TO_DEVICE);
863 (*pkts_compl)++;
864 bcm_sysport_free_cb(cb);
865 /* SKB fragment */
866 } else if (dma_unmap_addr(cb, dma_addr)) {
867 *bytes_compl += dma_unmap_len(cb, dma_len);
868 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
869 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
870 dma_unmap_addr_set(cb, dma_addr, 0);
871 }
872 }
873
874 /* Reclaim queued SKBs for transmission completion, lockless version */
875 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
876 struct bcm_sysport_tx_ring *ring)
877 {
878 unsigned int pkts_compl = 0, bytes_compl = 0;
879 struct net_device *ndev = priv->netdev;
880 unsigned int txbds_processed = 0;
881 struct bcm_sysport_cb *cb;
882 unsigned int txbds_ready;
883 unsigned int c_index;
884 u32 hw_ind;
885
886 /* Clear status before servicing to reduce spurious interrupts */
887 if (!ring->priv->is_lite)
888 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
889 else
890 intrl2_0_writel(ring->priv, BIT(ring->index +
891 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
892
893 /* Compute how many descriptors have been processed since last call */
894 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
895 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
896 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
897
898 netif_dbg(priv, tx_done, ndev,
899 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
900 ring->index, ring->c_index, c_index, txbds_ready);
901
902 while (txbds_processed < txbds_ready) {
903 cb = &ring->cbs[ring->clean_index];
904 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
905
906 ring->desc_count++;
907 txbds_processed++;
908
909 if (likely(ring->clean_index < ring->size - 1))
910 ring->clean_index++;
911 else
912 ring->clean_index = 0;
913 }
914
915 u64_stats_update_begin(&priv->syncp);
916 ring->packets += pkts_compl;
917 ring->bytes += bytes_compl;
918 u64_stats_update_end(&priv->syncp);
919
920 ring->c_index = c_index;
921
922 netif_dbg(priv, tx_done, ndev,
923 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
924 ring->index, ring->c_index, pkts_compl, bytes_compl);
925
926 return pkts_compl;
927 }
928
929 /* Locked version of the per-ring TX reclaim routine */
930 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
931 struct bcm_sysport_tx_ring *ring)
932 {
933 struct netdev_queue *txq;
934 unsigned int released;
935 unsigned long flags;
936
937 txq = netdev_get_tx_queue(priv->netdev, ring->index);
938
939 spin_lock_irqsave(&ring->lock, flags);
940 released = __bcm_sysport_tx_reclaim(priv, ring);
941 if (released)
942 netif_tx_wake_queue(txq);
943
944 spin_unlock_irqrestore(&ring->lock, flags);
945
946 return released;
947 }
948
949 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
950 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
951 struct bcm_sysport_tx_ring *ring)
952 {
953 unsigned long flags;
954
955 spin_lock_irqsave(&ring->lock, flags);
956 __bcm_sysport_tx_reclaim(priv, ring);
957 spin_unlock_irqrestore(&ring->lock, flags);
958 }
959
960 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
961 {
962 struct bcm_sysport_tx_ring *ring =
963 container_of(napi, struct bcm_sysport_tx_ring, napi);
964 unsigned int work_done = 0;
965
966 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
967
968 if (work_done == 0) {
969 napi_complete(napi);
970 /* re-enable TX interrupt */
971 if (!ring->priv->is_lite)
972 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
973 else
974 intrl2_0_mask_clear(ring->priv, BIT(ring->index +
975 INTRL2_0_TDMA_MBDONE_SHIFT));
976
977 return 0;
978 }
979
980 return budget;
981 }
982
983 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
984 {
985 unsigned int q;
986
987 for (q = 0; q < priv->netdev->num_tx_queues; q++)
988 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
989 }
990
991 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
992 {
993 struct bcm_sysport_priv *priv =
994 container_of(napi, struct bcm_sysport_priv, napi);
995 struct dim_sample dim_sample = {};
996 unsigned int work_done = 0;
997
998 work_done = bcm_sysport_desc_rx(priv, budget);
999
1000 priv->rx_c_index += work_done;
1001 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1002
1003 /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1004 * maintained by HW, but writes to it will be ignore while RDMA
1005 * is active
1006 */
1007 if (!priv->is_lite)
1008 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1009 else
1010 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1011
1012 if (work_done < budget) {
1013 napi_complete_done(napi, work_done);
1014 /* re-enable RX interrupts */
1015 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1016 }
1017
1018 if (priv->dim.use_dim) {
1019 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1020 priv->dim.bytes, &dim_sample);
1021 net_dim(&priv->dim.dim, dim_sample);
1022 }
1023
1024 return work_done;
1025 }
1026
1027 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1028 {
1029 u32 reg, bit;
1030
1031 reg = umac_readl(priv, UMAC_MPD_CTRL);
1032 if (enable)
1033 reg |= MPD_EN;
1034 else
1035 reg &= ~MPD_EN;
1036 umac_writel(priv, reg, UMAC_MPD_CTRL);
1037
1038 if (priv->is_lite)
1039 bit = RBUF_ACPI_EN_LITE;
1040 else
1041 bit = RBUF_ACPI_EN;
1042
1043 reg = rbuf_readl(priv, RBUF_CONTROL);
1044 if (enable)
1045 reg |= bit;
1046 else
1047 reg &= ~bit;
1048 rbuf_writel(priv, reg, RBUF_CONTROL);
1049 }
1050
1051 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1052 {
1053 unsigned int index;
1054 u32 reg;
1055
1056 /* Disable RXCHK, active filters and Broadcom tag matching */
1057 reg = rxchk_readl(priv, RXCHK_CONTROL);
1058 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1059 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1060 rxchk_writel(priv, reg, RXCHK_CONTROL);
1061
1062 /* Make sure we restore correct CID index in case HW lost
1063 * its context during deep idle state
1064 */
1065 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1066 rxchk_writel(priv, priv->filters_loc[index] <<
1067 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1068 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1069 }
1070
1071 /* Clear the MagicPacket detection logic */
1072 mpd_enable_set(priv, false);
1073
1074 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1075 if (reg & INTRL2_0_MPD)
1076 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1077
1078 if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1079 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1080 RXCHK_BRCM_TAG_MATCH_MASK;
1081 netdev_info(priv->netdev,
1082 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1083 }
1084
1085 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1086 }
1087
1088 static void bcm_sysport_dim_work(struct work_struct *work)
1089 {
1090 struct dim *dim = container_of(work, struct dim, work);
1091 struct bcm_sysport_net_dim *ndim =
1092 container_of(dim, struct bcm_sysport_net_dim, dim);
1093 struct bcm_sysport_priv *priv =
1094 container_of(ndim, struct bcm_sysport_priv, dim);
1095 struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1096 dim->profile_ix);
1097
1098 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1099 dim->state = DIM_START_MEASURE;
1100 }
1101
1102 /* RX and misc interrupt routine */
1103 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1104 {
1105 struct net_device *dev = dev_id;
1106 struct bcm_sysport_priv *priv = netdev_priv(dev);
1107 struct bcm_sysport_tx_ring *txr;
1108 unsigned int ring, ring_bit;
1109
1110 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1111 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1112 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1113
1114 if (unlikely(priv->irq0_stat == 0)) {
1115 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1116 return IRQ_NONE;
1117 }
1118
1119 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1120 priv->dim.event_ctr++;
1121 if (likely(napi_schedule_prep(&priv->napi))) {
1122 /* disable RX interrupts */
1123 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1124 __napi_schedule_irqoff(&priv->napi);
1125 }
1126 }
1127
1128 /* TX ring is full, perform a full reclaim since we do not know
1129 * which one would trigger this interrupt
1130 */
1131 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1132 bcm_sysport_tx_reclaim_all(priv);
1133
1134 if (!priv->is_lite)
1135 goto out;
1136
1137 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1138 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1139 if (!(priv->irq0_stat & ring_bit))
1140 continue;
1141
1142 txr = &priv->tx_rings[ring];
1143
1144 if (likely(napi_schedule_prep(&txr->napi))) {
1145 intrl2_0_mask_set(priv, ring_bit);
1146 __napi_schedule(&txr->napi);
1147 }
1148 }
1149 out:
1150 return IRQ_HANDLED;
1151 }
1152
1153 /* TX interrupt service routine */
1154 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1155 {
1156 struct net_device *dev = dev_id;
1157 struct bcm_sysport_priv *priv = netdev_priv(dev);
1158 struct bcm_sysport_tx_ring *txr;
1159 unsigned int ring;
1160
1161 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1162 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1163 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1164
1165 if (unlikely(priv->irq1_stat == 0)) {
1166 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1167 return IRQ_NONE;
1168 }
1169
1170 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1171 if (!(priv->irq1_stat & BIT(ring)))
1172 continue;
1173
1174 txr = &priv->tx_rings[ring];
1175
1176 if (likely(napi_schedule_prep(&txr->napi))) {
1177 intrl2_1_mask_set(priv, BIT(ring));
1178 __napi_schedule_irqoff(&txr->napi);
1179 }
1180 }
1181
1182 return IRQ_HANDLED;
1183 }
1184
1185 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1186 {
1187 struct bcm_sysport_priv *priv = dev_id;
1188
1189 pm_wakeup_event(&priv->pdev->dev, 0);
1190
1191 return IRQ_HANDLED;
1192 }
1193
1194 #ifdef CONFIG_NET_POLL_CONTROLLER
1195 static void bcm_sysport_poll_controller(struct net_device *dev)
1196 {
1197 struct bcm_sysport_priv *priv = netdev_priv(dev);
1198
1199 disable_irq(priv->irq0);
1200 bcm_sysport_rx_isr(priv->irq0, priv);
1201 enable_irq(priv->irq0);
1202
1203 if (!priv->is_lite) {
1204 disable_irq(priv->irq1);
1205 bcm_sysport_tx_isr(priv->irq1, priv);
1206 enable_irq(priv->irq1);
1207 }
1208 }
1209 #endif
1210
1211 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1212 struct net_device *dev)
1213 {
1214 struct bcm_sysport_priv *priv = netdev_priv(dev);
1215 struct sk_buff *nskb;
1216 struct bcm_tsb *tsb;
1217 u32 csum_info;
1218 u8 ip_proto;
1219 u16 csum_start;
1220 __be16 ip_ver;
1221
1222 /* Re-allocate SKB if needed */
1223 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1224 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1225 if (!nskb) {
1226 dev_kfree_skb_any(skb);
1227 priv->mib.tx_realloc_tsb_failed++;
1228 dev->stats.tx_errors++;
1229 dev->stats.tx_dropped++;
1230 return NULL;
1231 }
1232 dev_consume_skb_any(skb);
1233 skb = nskb;
1234 priv->mib.tx_realloc_tsb++;
1235 }
1236
1237 tsb = skb_push(skb, sizeof(*tsb));
1238 /* Zero-out TSB by default */
1239 memset(tsb, 0, sizeof(*tsb));
1240
1241 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1242 ip_ver = skb->protocol;
1243 switch (ip_ver) {
1244 case htons(ETH_P_IP):
1245 ip_proto = ip_hdr(skb)->protocol;
1246 break;
1247 case htons(ETH_P_IPV6):
1248 ip_proto = ipv6_hdr(skb)->nexthdr;
1249 break;
1250 default:
1251 return skb;
1252 }
1253
1254 /* Get the checksum offset and the L4 (transport) offset */
1255 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1256 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1257 csum_info |= (csum_start << L4_PTR_SHIFT);
1258
1259 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1260 csum_info |= L4_LENGTH_VALID;
1261 if (ip_proto == IPPROTO_UDP &&
1262 ip_ver == htons(ETH_P_IP))
1263 csum_info |= L4_UDP;
1264 } else {
1265 csum_info = 0;
1266 }
1267
1268 tsb->l4_ptr_dest_map = csum_info;
1269 }
1270
1271 return skb;
1272 }
1273
1274 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1275 struct net_device *dev)
1276 {
1277 struct bcm_sysport_priv *priv = netdev_priv(dev);
1278 struct device *kdev = &priv->pdev->dev;
1279 struct bcm_sysport_tx_ring *ring;
1280 struct bcm_sysport_cb *cb;
1281 struct netdev_queue *txq;
1282 u32 len_status, addr_lo;
1283 unsigned int skb_len;
1284 unsigned long flags;
1285 dma_addr_t mapping;
1286 u16 queue;
1287 int ret;
1288
1289 queue = skb_get_queue_mapping(skb);
1290 txq = netdev_get_tx_queue(dev, queue);
1291 ring = &priv->tx_rings[queue];
1292
1293 /* lock against tx reclaim in BH context and TX ring full interrupt */
1294 spin_lock_irqsave(&ring->lock, flags);
1295 if (unlikely(ring->desc_count == 0)) {
1296 netif_tx_stop_queue(txq);
1297 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1298 ret = NETDEV_TX_BUSY;
1299 goto out;
1300 }
1301
1302 /* Insert TSB and checksum infos */
1303 if (priv->tsb_en) {
1304 skb = bcm_sysport_insert_tsb(skb, dev);
1305 if (!skb) {
1306 ret = NETDEV_TX_OK;
1307 goto out;
1308 }
1309 }
1310
1311 skb_len = skb->len;
1312
1313 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1314 if (dma_mapping_error(kdev, mapping)) {
1315 priv->mib.tx_dma_failed++;
1316 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1317 skb->data, skb_len);
1318 ret = NETDEV_TX_OK;
1319 goto out;
1320 }
1321
1322 /* Remember the SKB for future freeing */
1323 cb = &ring->cbs[ring->curr_desc];
1324 cb->skb = skb;
1325 dma_unmap_addr_set(cb, dma_addr, mapping);
1326 dma_unmap_len_set(cb, dma_len, skb_len);
1327
1328 addr_lo = lower_32_bits(mapping);
1329 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1330 len_status |= (skb_len << DESC_LEN_SHIFT);
1331 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1332 DESC_STATUS_SHIFT;
1333 if (skb->ip_summed == CHECKSUM_PARTIAL)
1334 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1335
1336 ring->curr_desc++;
1337 if (ring->curr_desc == ring->size)
1338 ring->curr_desc = 0;
1339 ring->desc_count--;
1340
1341 /* Ports are latched, so write upper address first */
1342 tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1343 tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1344
1345 /* Check ring space and update SW control flow */
1346 if (ring->desc_count == 0)
1347 netif_tx_stop_queue(txq);
1348
1349 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1350 ring->index, ring->desc_count, ring->curr_desc);
1351
1352 ret = NETDEV_TX_OK;
1353 out:
1354 spin_unlock_irqrestore(&ring->lock, flags);
1355 return ret;
1356 }
1357
1358 static void bcm_sysport_tx_timeout(struct net_device *dev)
1359 {
1360 netdev_warn(dev, "transmit timeout!\n");
1361
1362 netif_trans_update(dev);
1363 dev->stats.tx_errors++;
1364
1365 netif_tx_wake_all_queues(dev);
1366 }
1367
1368 /* phylib adjust link callback */
1369 static void bcm_sysport_adj_link(struct net_device *dev)
1370 {
1371 struct bcm_sysport_priv *priv = netdev_priv(dev);
1372 struct phy_device *phydev = dev->phydev;
1373 unsigned int changed = 0;
1374 u32 cmd_bits = 0, reg;
1375
1376 if (priv->old_link != phydev->link) {
1377 changed = 1;
1378 priv->old_link = phydev->link;
1379 }
1380
1381 if (priv->old_duplex != phydev->duplex) {
1382 changed = 1;
1383 priv->old_duplex = phydev->duplex;
1384 }
1385
1386 if (priv->is_lite)
1387 goto out;
1388
1389 switch (phydev->speed) {
1390 case SPEED_2500:
1391 cmd_bits = CMD_SPEED_2500;
1392 break;
1393 case SPEED_1000:
1394 cmd_bits = CMD_SPEED_1000;
1395 break;
1396 case SPEED_100:
1397 cmd_bits = CMD_SPEED_100;
1398 break;
1399 case SPEED_10:
1400 cmd_bits = CMD_SPEED_10;
1401 break;
1402 default:
1403 break;
1404 }
1405 cmd_bits <<= CMD_SPEED_SHIFT;
1406
1407 if (phydev->duplex == DUPLEX_HALF)
1408 cmd_bits |= CMD_HD_EN;
1409
1410 if (priv->old_pause != phydev->pause) {
1411 changed = 1;
1412 priv->old_pause = phydev->pause;
1413 }
1414
1415 if (!phydev->pause)
1416 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1417
1418 if (!changed)
1419 return;
1420
1421 if (phydev->link) {
1422 reg = umac_readl(priv, UMAC_CMD);
1423 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1424 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1425 CMD_TX_PAUSE_IGNORE);
1426 reg |= cmd_bits;
1427 umac_writel(priv, reg, UMAC_CMD);
1428 }
1429 out:
1430 if (changed)
1431 phy_print_status(phydev);
1432 }
1433
1434 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1435 void (*cb)(struct work_struct *work))
1436 {
1437 struct bcm_sysport_net_dim *dim = &priv->dim;
1438
1439 INIT_WORK(&dim->dim.work, cb);
1440 dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1441 dim->event_ctr = 0;
1442 dim->packets = 0;
1443 dim->bytes = 0;
1444 }
1445
1446 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1447 {
1448 struct bcm_sysport_net_dim *dim = &priv->dim;
1449 struct dim_cq_moder moder;
1450 u32 usecs, pkts;
1451
1452 usecs = priv->rx_coalesce_usecs;
1453 pkts = priv->rx_max_coalesced_frames;
1454
1455 /* If DIM was enabled, re-apply default parameters */
1456 if (dim->use_dim) {
1457 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1458 usecs = moder.usec;
1459 pkts = moder.pkts;
1460 }
1461
1462 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1463 }
1464
1465 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1466 unsigned int index)
1467 {
1468 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1469 size_t size;
1470 u32 reg;
1471
1472 /* Simple descriptors partitioning for now */
1473 size = 256;
1474
1475 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1476 if (!ring->cbs) {
1477 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1478 return -ENOMEM;
1479 }
1480
1481 /* Initialize SW view of the ring */
1482 spin_lock_init(&ring->lock);
1483 ring->priv = priv;
1484 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1485 ring->index = index;
1486 ring->size = size;
1487 ring->clean_index = 0;
1488 ring->alloc_size = ring->size;
1489 ring->desc_count = ring->size;
1490 ring->curr_desc = 0;
1491
1492 /* Initialize HW ring */
1493 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1494 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1495 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1496 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1497
1498 /* Configure QID and port mapping */
1499 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1500 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1501 if (ring->inspect) {
1502 reg |= ring->switch_queue & RING_QID_MASK;
1503 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1504 } else {
1505 reg |= RING_IGNORE_STATUS;
1506 }
1507 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1508 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1509
1510 /* Enable ACB algorithm 2 */
1511 reg = tdma_readl(priv, TDMA_CONTROL);
1512 reg |= tdma_control_bit(priv, ACB_ALGO);
1513 tdma_writel(priv, reg, TDMA_CONTROL);
1514
1515 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1516 * with the original definition of ACB_ALGO
1517 */
1518 reg = tdma_readl(priv, TDMA_CONTROL);
1519 if (priv->is_lite)
1520 reg &= ~BIT(TSB_SWAP1);
1521 /* Set a correct TSB format based on host endian */
1522 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1523 reg |= tdma_control_bit(priv, TSB_SWAP0);
1524 else
1525 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1526 tdma_writel(priv, reg, TDMA_CONTROL);
1527
1528 /* Program the number of descriptors as MAX_THRESHOLD and half of
1529 * its size for the hysteresis trigger
1530 */
1531 tdma_writel(priv, ring->size |
1532 1 << RING_HYST_THRESH_SHIFT,
1533 TDMA_DESC_RING_MAX_HYST(index));
1534
1535 /* Enable the ring queue in the arbiter */
1536 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1537 reg |= (1 << index);
1538 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1539
1540 napi_enable(&ring->napi);
1541
1542 netif_dbg(priv, hw, priv->netdev,
1543 "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1544 ring->size, ring->switch_queue,
1545 ring->switch_port);
1546
1547 return 0;
1548 }
1549
1550 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1551 unsigned int index)
1552 {
1553 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1554 u32 reg;
1555
1556 /* Caller should stop the TDMA engine */
1557 reg = tdma_readl(priv, TDMA_STATUS);
1558 if (!(reg & TDMA_DISABLED))
1559 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1560
1561 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1562 * fail, so by checking this pointer we know whether the TX ring was
1563 * fully initialized or not.
1564 */
1565 if (!ring->cbs)
1566 return;
1567
1568 napi_disable(&ring->napi);
1569 netif_napi_del(&ring->napi);
1570
1571 bcm_sysport_tx_clean(priv, ring);
1572
1573 kfree(ring->cbs);
1574 ring->cbs = NULL;
1575 ring->size = 0;
1576 ring->alloc_size = 0;
1577
1578 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1579 }
1580
1581 /* RDMA helper */
1582 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1583 unsigned int enable)
1584 {
1585 unsigned int timeout = 1000;
1586 u32 reg;
1587
1588 reg = rdma_readl(priv, RDMA_CONTROL);
1589 if (enable)
1590 reg |= RDMA_EN;
1591 else
1592 reg &= ~RDMA_EN;
1593 rdma_writel(priv, reg, RDMA_CONTROL);
1594
1595 /* Poll for RMDA disabling completion */
1596 do {
1597 reg = rdma_readl(priv, RDMA_STATUS);
1598 if (!!(reg & RDMA_DISABLED) == !enable)
1599 return 0;
1600 usleep_range(1000, 2000);
1601 } while (timeout-- > 0);
1602
1603 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1604
1605 return -ETIMEDOUT;
1606 }
1607
1608 /* TDMA helper */
1609 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1610 unsigned int enable)
1611 {
1612 unsigned int timeout = 1000;
1613 u32 reg;
1614
1615 reg = tdma_readl(priv, TDMA_CONTROL);
1616 if (enable)
1617 reg |= tdma_control_bit(priv, TDMA_EN);
1618 else
1619 reg &= ~tdma_control_bit(priv, TDMA_EN);
1620 tdma_writel(priv, reg, TDMA_CONTROL);
1621
1622 /* Poll for TMDA disabling completion */
1623 do {
1624 reg = tdma_readl(priv, TDMA_STATUS);
1625 if (!!(reg & TDMA_DISABLED) == !enable)
1626 return 0;
1627
1628 usleep_range(1000, 2000);
1629 } while (timeout-- > 0);
1630
1631 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1632
1633 return -ETIMEDOUT;
1634 }
1635
1636 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1637 {
1638 struct bcm_sysport_cb *cb;
1639 u32 reg;
1640 int ret;
1641 int i;
1642
1643 /* Initialize SW view of the RX ring */
1644 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1645 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1646 priv->rx_c_index = 0;
1647 priv->rx_read_ptr = 0;
1648 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1649 GFP_KERNEL);
1650 if (!priv->rx_cbs) {
1651 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1652 return -ENOMEM;
1653 }
1654
1655 for (i = 0; i < priv->num_rx_bds; i++) {
1656 cb = priv->rx_cbs + i;
1657 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1658 }
1659
1660 ret = bcm_sysport_alloc_rx_bufs(priv);
1661 if (ret) {
1662 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1663 return ret;
1664 }
1665
1666 /* Initialize HW, ensure RDMA is disabled */
1667 reg = rdma_readl(priv, RDMA_STATUS);
1668 if (!(reg & RDMA_DISABLED))
1669 rdma_enable_set(priv, 0);
1670
1671 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1672 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1673 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1674 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1675 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1676 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1677 /* Operate the queue in ring mode */
1678 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1679 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1680 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1681 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1682
1683 netif_dbg(priv, hw, priv->netdev,
1684 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1685 priv->num_rx_bds, priv->rx_bds);
1686
1687 return 0;
1688 }
1689
1690 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1691 {
1692 struct bcm_sysport_cb *cb;
1693 unsigned int i;
1694 u32 reg;
1695
1696 /* Caller should ensure RDMA is disabled */
1697 reg = rdma_readl(priv, RDMA_STATUS);
1698 if (!(reg & RDMA_DISABLED))
1699 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1700
1701 for (i = 0; i < priv->num_rx_bds; i++) {
1702 cb = &priv->rx_cbs[i];
1703 if (dma_unmap_addr(cb, dma_addr))
1704 dma_unmap_single(&priv->pdev->dev,
1705 dma_unmap_addr(cb, dma_addr),
1706 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1707 bcm_sysport_free_cb(cb);
1708 }
1709
1710 kfree(priv->rx_cbs);
1711 priv->rx_cbs = NULL;
1712
1713 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1714 }
1715
1716 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1717 {
1718 struct bcm_sysport_priv *priv = netdev_priv(dev);
1719 u32 reg;
1720
1721 if (priv->is_lite)
1722 return;
1723
1724 reg = umac_readl(priv, UMAC_CMD);
1725 if (dev->flags & IFF_PROMISC)
1726 reg |= CMD_PROMISC;
1727 else
1728 reg &= ~CMD_PROMISC;
1729 umac_writel(priv, reg, UMAC_CMD);
1730
1731 /* No support for ALLMULTI */
1732 if (dev->flags & IFF_ALLMULTI)
1733 return;
1734 }
1735
1736 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1737 u32 mask, unsigned int enable)
1738 {
1739 u32 reg;
1740
1741 if (!priv->is_lite) {
1742 reg = umac_readl(priv, UMAC_CMD);
1743 if (enable)
1744 reg |= mask;
1745 else
1746 reg &= ~mask;
1747 umac_writel(priv, reg, UMAC_CMD);
1748 } else {
1749 reg = gib_readl(priv, GIB_CONTROL);
1750 if (enable)
1751 reg |= mask;
1752 else
1753 reg &= ~mask;
1754 gib_writel(priv, reg, GIB_CONTROL);
1755 }
1756
1757 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1758 * to be processed (1 msec).
1759 */
1760 if (enable == 0)
1761 usleep_range(1000, 2000);
1762 }
1763
1764 static inline void umac_reset(struct bcm_sysport_priv *priv)
1765 {
1766 u32 reg;
1767
1768 if (priv->is_lite)
1769 return;
1770
1771 reg = umac_readl(priv, UMAC_CMD);
1772 reg |= CMD_SW_RESET;
1773 umac_writel(priv, reg, UMAC_CMD);
1774 udelay(10);
1775 reg = umac_readl(priv, UMAC_CMD);
1776 reg &= ~CMD_SW_RESET;
1777 umac_writel(priv, reg, UMAC_CMD);
1778 }
1779
1780 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1781 unsigned char *addr)
1782 {
1783 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1784 addr[3];
1785 u32 mac1 = (addr[4] << 8) | addr[5];
1786
1787 if (!priv->is_lite) {
1788 umac_writel(priv, mac0, UMAC_MAC0);
1789 umac_writel(priv, mac1, UMAC_MAC1);
1790 } else {
1791 gib_writel(priv, mac0, GIB_MAC0);
1792 gib_writel(priv, mac1, GIB_MAC1);
1793 }
1794 }
1795
1796 static void topctrl_flush(struct bcm_sysport_priv *priv)
1797 {
1798 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1799 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1800 mdelay(1);
1801 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1802 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1803 }
1804
1805 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1806 {
1807 struct bcm_sysport_priv *priv = netdev_priv(dev);
1808 struct sockaddr *addr = p;
1809
1810 if (!is_valid_ether_addr(addr->sa_data))
1811 return -EINVAL;
1812
1813 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1814
1815 /* interface is disabled, changes to MAC will be reflected on next
1816 * open call
1817 */
1818 if (!netif_running(dev))
1819 return 0;
1820
1821 umac_set_hw_addr(priv, dev->dev_addr);
1822
1823 return 0;
1824 }
1825
1826 static void bcm_sysport_get_stats64(struct net_device *dev,
1827 struct rtnl_link_stats64 *stats)
1828 {
1829 struct bcm_sysport_priv *priv = netdev_priv(dev);
1830 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1831 unsigned int start;
1832
1833 netdev_stats_to_stats64(stats, &dev->stats);
1834
1835 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1836 &stats->tx_packets);
1837
1838 do {
1839 start = u64_stats_fetch_begin_irq(&priv->syncp);
1840 stats->rx_packets = stats64->rx_packets;
1841 stats->rx_bytes = stats64->rx_bytes;
1842 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1843 }
1844
1845 static void bcm_sysport_netif_start(struct net_device *dev)
1846 {
1847 struct bcm_sysport_priv *priv = netdev_priv(dev);
1848
1849 /* Enable NAPI */
1850 bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1851 bcm_sysport_init_rx_coalesce(priv);
1852 napi_enable(&priv->napi);
1853
1854 /* Enable RX interrupt and TX ring full interrupt */
1855 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1856
1857 phy_start(dev->phydev);
1858
1859 /* Enable TX interrupts for the TXQs */
1860 if (!priv->is_lite)
1861 intrl2_1_mask_clear(priv, 0xffffffff);
1862 else
1863 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1864 }
1865
1866 static void rbuf_init(struct bcm_sysport_priv *priv)
1867 {
1868 u32 reg;
1869
1870 reg = rbuf_readl(priv, RBUF_CONTROL);
1871 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1872 /* Set a correct RSB format on SYSTEMPORT Lite */
1873 if (priv->is_lite)
1874 reg &= ~RBUF_RSB_SWAP1;
1875
1876 /* Set a correct RSB format based on host endian */
1877 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1878 reg |= RBUF_RSB_SWAP0;
1879 else
1880 reg &= ~RBUF_RSB_SWAP0;
1881 rbuf_writel(priv, reg, RBUF_CONTROL);
1882 }
1883
1884 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1885 {
1886 intrl2_0_mask_set(priv, 0xffffffff);
1887 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1888 if (!priv->is_lite) {
1889 intrl2_1_mask_set(priv, 0xffffffff);
1890 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1891 }
1892 }
1893
1894 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1895 {
1896 u32 reg;
1897
1898 reg = gib_readl(priv, GIB_CONTROL);
1899 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1900 if (netdev_uses_dsa(priv->netdev)) {
1901 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1902 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1903 }
1904 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1905 reg |= 12 << GIB_IPG_LEN_SHIFT;
1906 gib_writel(priv, reg, GIB_CONTROL);
1907 }
1908
1909 static int bcm_sysport_open(struct net_device *dev)
1910 {
1911 struct bcm_sysport_priv *priv = netdev_priv(dev);
1912 struct phy_device *phydev;
1913 unsigned int i;
1914 int ret;
1915
1916 /* Reset UniMAC */
1917 umac_reset(priv);
1918
1919 /* Flush TX and RX FIFOs at TOPCTRL level */
1920 topctrl_flush(priv);
1921
1922 /* Disable the UniMAC RX/TX */
1923 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1924
1925 /* Enable RBUF 2bytes alignment and Receive Status Block */
1926 rbuf_init(priv);
1927
1928 /* Set maximum frame length */
1929 if (!priv->is_lite)
1930 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1931 else
1932 gib_set_pad_extension(priv);
1933
1934 /* Apply features again in case we changed them while interface was
1935 * down
1936 */
1937 bcm_sysport_set_features(dev, dev->features);
1938
1939 /* Set MAC address */
1940 umac_set_hw_addr(priv, dev->dev_addr);
1941
1942 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1943 0, priv->phy_interface);
1944 if (!phydev) {
1945 netdev_err(dev, "could not attach to PHY\n");
1946 return -ENODEV;
1947 }
1948
1949 /* Reset house keeping link status */
1950 priv->old_duplex = -1;
1951 priv->old_link = -1;
1952 priv->old_pause = -1;
1953
1954 /* mask all interrupts and request them */
1955 bcm_sysport_mask_all_intrs(priv);
1956
1957 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1958 if (ret) {
1959 netdev_err(dev, "failed to request RX interrupt\n");
1960 goto out_phy_disconnect;
1961 }
1962
1963 if (!priv->is_lite) {
1964 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1965 dev->name, dev);
1966 if (ret) {
1967 netdev_err(dev, "failed to request TX interrupt\n");
1968 goto out_free_irq0;
1969 }
1970 }
1971
1972 /* Initialize both hardware and software ring */
1973 for (i = 0; i < dev->num_tx_queues; i++) {
1974 ret = bcm_sysport_init_tx_ring(priv, i);
1975 if (ret) {
1976 netdev_err(dev, "failed to initialize TX ring %d\n",
1977 i);
1978 goto out_free_tx_ring;
1979 }
1980 }
1981
1982 /* Initialize linked-list */
1983 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1984
1985 /* Initialize RX ring */
1986 ret = bcm_sysport_init_rx_ring(priv);
1987 if (ret) {
1988 netdev_err(dev, "failed to initialize RX ring\n");
1989 goto out_free_rx_ring;
1990 }
1991
1992 /* Turn on RDMA */
1993 ret = rdma_enable_set(priv, 1);
1994 if (ret)
1995 goto out_free_rx_ring;
1996
1997 /* Turn on TDMA */
1998 ret = tdma_enable_set(priv, 1);
1999 if (ret)
2000 goto out_clear_rx_int;
2001
2002 /* Turn on UniMAC TX/RX */
2003 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2004
2005 bcm_sysport_netif_start(dev);
2006
2007 netif_tx_start_all_queues(dev);
2008
2009 return 0;
2010
2011 out_clear_rx_int:
2012 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2013 out_free_rx_ring:
2014 bcm_sysport_fini_rx_ring(priv);
2015 out_free_tx_ring:
2016 for (i = 0; i < dev->num_tx_queues; i++)
2017 bcm_sysport_fini_tx_ring(priv, i);
2018 if (!priv->is_lite)
2019 free_irq(priv->irq1, dev);
2020 out_free_irq0:
2021 free_irq(priv->irq0, dev);
2022 out_phy_disconnect:
2023 phy_disconnect(phydev);
2024 return ret;
2025 }
2026
2027 static void bcm_sysport_netif_stop(struct net_device *dev)
2028 {
2029 struct bcm_sysport_priv *priv = netdev_priv(dev);
2030
2031 /* stop all software from updating hardware */
2032 netif_tx_disable(dev);
2033 napi_disable(&priv->napi);
2034 cancel_work_sync(&priv->dim.dim.work);
2035 phy_stop(dev->phydev);
2036
2037 /* mask all interrupts */
2038 bcm_sysport_mask_all_intrs(priv);
2039 }
2040
2041 static int bcm_sysport_stop(struct net_device *dev)
2042 {
2043 struct bcm_sysport_priv *priv = netdev_priv(dev);
2044 unsigned int i;
2045 int ret;
2046
2047 bcm_sysport_netif_stop(dev);
2048
2049 /* Disable UniMAC RX */
2050 umac_enable_set(priv, CMD_RX_EN, 0);
2051
2052 ret = tdma_enable_set(priv, 0);
2053 if (ret) {
2054 netdev_err(dev, "timeout disabling RDMA\n");
2055 return ret;
2056 }
2057
2058 /* Wait for a maximum packet size to be drained */
2059 usleep_range(2000, 3000);
2060
2061 ret = rdma_enable_set(priv, 0);
2062 if (ret) {
2063 netdev_err(dev, "timeout disabling TDMA\n");
2064 return ret;
2065 }
2066
2067 /* Disable UniMAC TX */
2068 umac_enable_set(priv, CMD_TX_EN, 0);
2069
2070 /* Free RX/TX rings SW structures */
2071 for (i = 0; i < dev->num_tx_queues; i++)
2072 bcm_sysport_fini_tx_ring(priv, i);
2073 bcm_sysport_fini_rx_ring(priv);
2074
2075 free_irq(priv->irq0, dev);
2076 if (!priv->is_lite)
2077 free_irq(priv->irq1, dev);
2078
2079 /* Disconnect from PHY */
2080 phy_disconnect(dev->phydev);
2081
2082 return 0;
2083 }
2084
2085 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2086 u64 location)
2087 {
2088 unsigned int index;
2089 u32 reg;
2090
2091 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2092 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2093 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2094 reg &= RXCHK_BRCM_TAG_CID_MASK;
2095 if (reg == location)
2096 return index;
2097 }
2098
2099 return -EINVAL;
2100 }
2101
2102 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2103 struct ethtool_rxnfc *nfc)
2104 {
2105 int index;
2106
2107 /* This is not a rule that we know about */
2108 index = bcm_sysport_rule_find(priv, nfc->fs.location);
2109 if (index < 0)
2110 return -EOPNOTSUPP;
2111
2112 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2113
2114 return 0;
2115 }
2116
2117 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2118 struct ethtool_rxnfc *nfc)
2119 {
2120 unsigned int index;
2121 u32 reg;
2122
2123 /* We cannot match locations greater than what the classification ID
2124 * permits (256 entries)
2125 */
2126 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2127 return -E2BIG;
2128
2129 /* We cannot support flows that are not destined for a wake-up */
2130 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2131 return -EOPNOTSUPP;
2132
2133 /* All filters are already in use, we cannot match more rules */
2134 if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2135 RXCHK_BRCM_TAG_MAX)
2136 return -ENOSPC;
2137
2138 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2139 if (index > RXCHK_BRCM_TAG_MAX)
2140 return -ENOSPC;
2141
2142 /* Location is the classification ID, and index is the position
2143 * within one of our 8 possible filters to be programmed
2144 */
2145 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2146 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2147 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2148 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2149 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2150
2151 priv->filters_loc[index] = nfc->fs.location;
2152 set_bit(index, priv->filters);
2153
2154 return 0;
2155 }
2156
2157 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2158 u64 location)
2159 {
2160 int index;
2161
2162 /* This is not a rule that we know about */
2163 index = bcm_sysport_rule_find(priv, location);
2164 if (index < 0)
2165 return -EOPNOTSUPP;
2166
2167 /* No need to disable this filter if it was enabled, this will
2168 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2169 */
2170 clear_bit(index, priv->filters);
2171 priv->filters_loc[index] = 0;
2172
2173 return 0;
2174 }
2175
2176 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2177 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2178 {
2179 struct bcm_sysport_priv *priv = netdev_priv(dev);
2180 int ret = -EOPNOTSUPP;
2181
2182 switch (nfc->cmd) {
2183 case ETHTOOL_GRXCLSRULE:
2184 ret = bcm_sysport_rule_get(priv, nfc);
2185 break;
2186 default:
2187 break;
2188 }
2189
2190 return ret;
2191 }
2192
2193 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2194 struct ethtool_rxnfc *nfc)
2195 {
2196 struct bcm_sysport_priv *priv = netdev_priv(dev);
2197 int ret = -EOPNOTSUPP;
2198
2199 switch (nfc->cmd) {
2200 case ETHTOOL_SRXCLSRLINS:
2201 ret = bcm_sysport_rule_set(priv, nfc);
2202 break;
2203 case ETHTOOL_SRXCLSRLDEL:
2204 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2205 break;
2206 default:
2207 break;
2208 }
2209
2210 return ret;
2211 }
2212
2213 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2214 .get_drvinfo = bcm_sysport_get_drvinfo,
2215 .get_msglevel = bcm_sysport_get_msglvl,
2216 .set_msglevel = bcm_sysport_set_msglvl,
2217 .get_link = ethtool_op_get_link,
2218 .get_strings = bcm_sysport_get_strings,
2219 .get_ethtool_stats = bcm_sysport_get_stats,
2220 .get_sset_count = bcm_sysport_get_sset_count,
2221 .get_wol = bcm_sysport_get_wol,
2222 .set_wol = bcm_sysport_set_wol,
2223 .get_coalesce = bcm_sysport_get_coalesce,
2224 .set_coalesce = bcm_sysport_set_coalesce,
2225 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2226 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2227 .get_rxnfc = bcm_sysport_get_rxnfc,
2228 .set_rxnfc = bcm_sysport_set_rxnfc,
2229 };
2230
2231 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2232 struct net_device *sb_dev)
2233 {
2234 struct bcm_sysport_priv *priv = netdev_priv(dev);
2235 u16 queue = skb_get_queue_mapping(skb);
2236 struct bcm_sysport_tx_ring *tx_ring;
2237 unsigned int q, port;
2238
2239 if (!netdev_uses_dsa(dev))
2240 return netdev_pick_tx(dev, skb, NULL);
2241
2242 /* DSA tagging layer will have configured the correct queue */
2243 q = BRCM_TAG_GET_QUEUE(queue);
2244 port = BRCM_TAG_GET_PORT(queue);
2245 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2246
2247 if (unlikely(!tx_ring))
2248 return netdev_pick_tx(dev, skb, NULL);
2249
2250 return tx_ring->index;
2251 }
2252
2253 static const struct net_device_ops bcm_sysport_netdev_ops = {
2254 .ndo_start_xmit = bcm_sysport_xmit,
2255 .ndo_tx_timeout = bcm_sysport_tx_timeout,
2256 .ndo_open = bcm_sysport_open,
2257 .ndo_stop = bcm_sysport_stop,
2258 .ndo_set_features = bcm_sysport_set_features,
2259 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
2260 .ndo_set_mac_address = bcm_sysport_change_mac,
2261 #ifdef CONFIG_NET_POLL_CONTROLLER
2262 .ndo_poll_controller = bcm_sysport_poll_controller,
2263 #endif
2264 .ndo_get_stats64 = bcm_sysport_get_stats64,
2265 .ndo_select_queue = bcm_sysport_select_queue,
2266 };
2267
2268 static int bcm_sysport_map_queues(struct notifier_block *nb,
2269 struct dsa_notifier_register_info *info)
2270 {
2271 struct bcm_sysport_tx_ring *ring;
2272 struct bcm_sysport_priv *priv;
2273 struct net_device *slave_dev;
2274 unsigned int num_tx_queues;
2275 unsigned int q, qp, port;
2276 struct net_device *dev;
2277
2278 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2279 if (priv->netdev != info->master)
2280 return 0;
2281
2282 dev = info->master;
2283
2284 /* We can't be setting up queue inspection for non directly attached
2285 * switches
2286 */
2287 if (info->switch_number)
2288 return 0;
2289
2290 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2291 return 0;
2292
2293 port = info->port_number;
2294 slave_dev = info->info.dev;
2295
2296 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2297 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2298 * per-port (slave_dev) network devices queue, we achieve just that.
2299 * This need to happen now before any slave network device is used such
2300 * it accurately reflects the number of real TX queues.
2301 */
2302 if (priv->is_lite)
2303 netif_set_real_num_tx_queues(slave_dev,
2304 slave_dev->num_tx_queues / 2);
2305
2306 num_tx_queues = slave_dev->real_num_tx_queues;
2307
2308 if (priv->per_port_num_tx_queues &&
2309 priv->per_port_num_tx_queues != num_tx_queues)
2310 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2311
2312 priv->per_port_num_tx_queues = num_tx_queues;
2313
2314 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2315 q++) {
2316 ring = &priv->tx_rings[q];
2317
2318 if (ring->inspect)
2319 continue;
2320
2321 /* Just remember the mapping actual programming done
2322 * during bcm_sysport_init_tx_ring
2323 */
2324 ring->switch_queue = qp;
2325 ring->switch_port = port;
2326 ring->inspect = true;
2327 priv->ring_map[q + port * num_tx_queues] = ring;
2328 qp++;
2329 }
2330
2331 return 0;
2332 }
2333
2334 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2335 struct dsa_notifier_register_info *info)
2336 {
2337 struct bcm_sysport_tx_ring *ring;
2338 struct bcm_sysport_priv *priv;
2339 struct net_device *slave_dev;
2340 unsigned int num_tx_queues;
2341 struct net_device *dev;
2342 unsigned int q, port;
2343
2344 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2345 if (priv->netdev != info->master)
2346 return 0;
2347
2348 dev = info->master;
2349
2350 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2351 return 0;
2352
2353 port = info->port_number;
2354 slave_dev = info->info.dev;
2355
2356 num_tx_queues = slave_dev->real_num_tx_queues;
2357
2358 for (q = 0; q < dev->num_tx_queues; q++) {
2359 ring = &priv->tx_rings[q];
2360
2361 if (ring->switch_port != port)
2362 continue;
2363
2364 if (!ring->inspect)
2365 continue;
2366
2367 ring->inspect = false;
2368 priv->ring_map[q + port * num_tx_queues] = NULL;
2369 }
2370
2371 return 0;
2372 }
2373
2374 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2375 unsigned long event, void *ptr)
2376 {
2377 int ret = NOTIFY_DONE;
2378
2379 switch (event) {
2380 case DSA_PORT_REGISTER:
2381 ret = bcm_sysport_map_queues(nb, ptr);
2382 break;
2383 case DSA_PORT_UNREGISTER:
2384 ret = bcm_sysport_unmap_queues(nb, ptr);
2385 break;
2386 }
2387
2388 return notifier_from_errno(ret);
2389 }
2390
2391 #define REV_FMT "v%2x.%02x"
2392
2393 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2394 [SYSTEMPORT] = {
2395 .is_lite = false,
2396 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2397 },
2398 [SYSTEMPORT_LITE] = {
2399 .is_lite = true,
2400 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2401 },
2402 };
2403
2404 static const struct of_device_id bcm_sysport_of_match[] = {
2405 { .compatible = "brcm,systemportlite-v1.00",
2406 .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2407 { .compatible = "brcm,systemport-v1.00",
2408 .data = &bcm_sysport_params[SYSTEMPORT] },
2409 { .compatible = "brcm,systemport",
2410 .data = &bcm_sysport_params[SYSTEMPORT] },
2411 { /* sentinel */ }
2412 };
2413 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2414
2415 static int bcm_sysport_probe(struct platform_device *pdev)
2416 {
2417 const struct bcm_sysport_hw_params *params;
2418 const struct of_device_id *of_id = NULL;
2419 struct bcm_sysport_priv *priv;
2420 struct device_node *dn;
2421 struct net_device *dev;
2422 const void *macaddr;
2423 struct resource *r;
2424 u32 txq, rxq;
2425 int ret;
2426
2427 dn = pdev->dev.of_node;
2428 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2429 of_id = of_match_node(bcm_sysport_of_match, dn);
2430 if (!of_id || !of_id->data)
2431 return -EINVAL;
2432
2433 /* Fairly quickly we need to know the type of adapter we have */
2434 params = of_id->data;
2435
2436 /* Read the Transmit/Receive Queue properties */
2437 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2438 txq = TDMA_NUM_RINGS;
2439 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2440 rxq = 1;
2441
2442 /* Sanity check the number of transmit queues */
2443 if (!txq || txq > TDMA_NUM_RINGS)
2444 return -EINVAL;
2445
2446 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2447 if (!dev)
2448 return -ENOMEM;
2449
2450 /* Initialize private members */
2451 priv = netdev_priv(dev);
2452
2453 /* Allocate number of TX rings */
2454 priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2455 sizeof(struct bcm_sysport_tx_ring),
2456 GFP_KERNEL);
2457 if (!priv->tx_rings)
2458 return -ENOMEM;
2459
2460 priv->is_lite = params->is_lite;
2461 priv->num_rx_desc_words = params->num_rx_desc_words;
2462
2463 priv->irq0 = platform_get_irq(pdev, 0);
2464 if (!priv->is_lite) {
2465 priv->irq1 = platform_get_irq(pdev, 1);
2466 priv->wol_irq = platform_get_irq(pdev, 2);
2467 } else {
2468 priv->wol_irq = platform_get_irq(pdev, 1);
2469 }
2470 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2471 dev_err(&pdev->dev, "invalid interrupts\n");
2472 ret = -EINVAL;
2473 goto err_free_netdev;
2474 }
2475
2476 priv->base = devm_ioremap_resource(&pdev->dev, r);
2477 if (IS_ERR(priv->base)) {
2478 ret = PTR_ERR(priv->base);
2479 goto err_free_netdev;
2480 }
2481
2482 priv->netdev = dev;
2483 priv->pdev = pdev;
2484
2485 priv->phy_interface = of_get_phy_mode(dn);
2486 /* Default to GMII interface mode */
2487 if (priv->phy_interface < 0)
2488 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2489
2490 /* In the case of a fixed PHY, the DT node associated
2491 * to the PHY is the Ethernet MAC DT node.
2492 */
2493 if (of_phy_is_fixed_link(dn)) {
2494 ret = of_phy_register_fixed_link(dn);
2495 if (ret) {
2496 dev_err(&pdev->dev, "failed to register fixed PHY\n");
2497 goto err_free_netdev;
2498 }
2499
2500 priv->phy_dn = dn;
2501 }
2502
2503 /* Initialize netdevice members */
2504 macaddr = of_get_mac_address(dn);
2505 if (IS_ERR(macaddr)) {
2506 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2507 eth_hw_addr_random(dev);
2508 } else {
2509 ether_addr_copy(dev->dev_addr, macaddr);
2510 }
2511
2512 SET_NETDEV_DEV(dev, &pdev->dev);
2513 dev_set_drvdata(&pdev->dev, dev);
2514 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2515 dev->netdev_ops = &bcm_sysport_netdev_ops;
2516 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2517
2518 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2519 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2520 dev->hw_features |= dev->features;
2521 dev->vlan_features |= dev->features;
2522
2523 /* Request the WOL interrupt and advertise suspend if available */
2524 priv->wol_irq_disabled = 1;
2525 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2526 bcm_sysport_wol_isr, 0, dev->name, priv);
2527 if (!ret)
2528 device_set_wakeup_capable(&pdev->dev, 1);
2529
2530 /* Set the needed headroom once and for all */
2531 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2532 dev->needed_headroom += sizeof(struct bcm_tsb);
2533
2534 /* libphy will adjust the link state accordingly */
2535 netif_carrier_off(dev);
2536
2537 priv->rx_max_coalesced_frames = 1;
2538 u64_stats_init(&priv->syncp);
2539
2540 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2541
2542 ret = register_dsa_notifier(&priv->dsa_notifier);
2543 if (ret) {
2544 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2545 goto err_deregister_fixed_link;
2546 }
2547
2548 ret = register_netdev(dev);
2549 if (ret) {
2550 dev_err(&pdev->dev, "failed to register net_device\n");
2551 goto err_deregister_notifier;
2552 }
2553
2554 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2555 dev_info(&pdev->dev,
2556 "Broadcom SYSTEMPORT%s " REV_FMT
2557 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2558 priv->is_lite ? " Lite" : "",
2559 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2560 priv->irq0, priv->irq1, txq, rxq);
2561
2562 return 0;
2563
2564 err_deregister_notifier:
2565 unregister_dsa_notifier(&priv->dsa_notifier);
2566 err_deregister_fixed_link:
2567 if (of_phy_is_fixed_link(dn))
2568 of_phy_deregister_fixed_link(dn);
2569 err_free_netdev:
2570 free_netdev(dev);
2571 return ret;
2572 }
2573
2574 static int bcm_sysport_remove(struct platform_device *pdev)
2575 {
2576 struct net_device *dev = dev_get_drvdata(&pdev->dev);
2577 struct bcm_sysport_priv *priv = netdev_priv(dev);
2578 struct device_node *dn = pdev->dev.of_node;
2579
2580 /* Not much to do, ndo_close has been called
2581 * and we use managed allocations
2582 */
2583 unregister_dsa_notifier(&priv->dsa_notifier);
2584 unregister_netdev(dev);
2585 if (of_phy_is_fixed_link(dn))
2586 of_phy_deregister_fixed_link(dn);
2587 free_netdev(dev);
2588 dev_set_drvdata(&pdev->dev, NULL);
2589
2590 return 0;
2591 }
2592
2593 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2594 {
2595 struct net_device *ndev = priv->netdev;
2596 unsigned int timeout = 1000;
2597 unsigned int index, i = 0;
2598 u32 reg;
2599
2600 reg = umac_readl(priv, UMAC_MPD_CTRL);
2601 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2602 reg |= MPD_EN;
2603 reg &= ~PSW_EN;
2604 if (priv->wolopts & WAKE_MAGICSECURE) {
2605 /* Program the SecureOn password */
2606 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2607 UMAC_PSW_MS);
2608 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2609 UMAC_PSW_LS);
2610 reg |= PSW_EN;
2611 }
2612 umac_writel(priv, reg, UMAC_MPD_CTRL);
2613
2614 if (priv->wolopts & WAKE_FILTER) {
2615 /* Turn on ACPI matching to steal packets from RBUF */
2616 reg = rbuf_readl(priv, RBUF_CONTROL);
2617 if (priv->is_lite)
2618 reg |= RBUF_ACPI_EN_LITE;
2619 else
2620 reg |= RBUF_ACPI_EN;
2621 rbuf_writel(priv, reg, RBUF_CONTROL);
2622
2623 /* Enable RXCHK, active filters and Broadcom tag matching */
2624 reg = rxchk_readl(priv, RXCHK_CONTROL);
2625 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2626 RXCHK_BRCM_TAG_MATCH_SHIFT);
2627 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2628 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2629 i++;
2630 }
2631 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2632 rxchk_writel(priv, reg, RXCHK_CONTROL);
2633 }
2634
2635 /* Make sure RBUF entered WoL mode as result */
2636 do {
2637 reg = rbuf_readl(priv, RBUF_STATUS);
2638 if (reg & RBUF_WOL_MODE)
2639 break;
2640
2641 udelay(10);
2642 } while (timeout-- > 0);
2643
2644 /* Do not leave the UniMAC RBUF matching only MPD packets */
2645 if (!timeout) {
2646 mpd_enable_set(priv, false);
2647 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2648 return -ETIMEDOUT;
2649 }
2650
2651 /* UniMAC receive needs to be turned on */
2652 umac_enable_set(priv, CMD_RX_EN, 1);
2653
2654 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2655
2656 return 0;
2657 }
2658
2659 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2660 {
2661 struct net_device *dev = dev_get_drvdata(d);
2662 struct bcm_sysport_priv *priv = netdev_priv(dev);
2663 unsigned int i;
2664 int ret = 0;
2665 u32 reg;
2666
2667 if (!netif_running(dev))
2668 return 0;
2669
2670 netif_device_detach(dev);
2671
2672 bcm_sysport_netif_stop(dev);
2673
2674 phy_suspend(dev->phydev);
2675
2676 /* Disable UniMAC RX */
2677 umac_enable_set(priv, CMD_RX_EN, 0);
2678
2679 ret = rdma_enable_set(priv, 0);
2680 if (ret) {
2681 netdev_err(dev, "RDMA timeout!\n");
2682 return ret;
2683 }
2684
2685 /* Disable RXCHK if enabled */
2686 if (priv->rx_chk_en) {
2687 reg = rxchk_readl(priv, RXCHK_CONTROL);
2688 reg &= ~RXCHK_EN;
2689 rxchk_writel(priv, reg, RXCHK_CONTROL);
2690 }
2691
2692 /* Flush RX pipe */
2693 if (!priv->wolopts)
2694 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2695
2696 ret = tdma_enable_set(priv, 0);
2697 if (ret) {
2698 netdev_err(dev, "TDMA timeout!\n");
2699 return ret;
2700 }
2701
2702 /* Wait for a packet boundary */
2703 usleep_range(2000, 3000);
2704
2705 umac_enable_set(priv, CMD_TX_EN, 0);
2706
2707 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2708
2709 /* Free RX/TX rings SW structures */
2710 for (i = 0; i < dev->num_tx_queues; i++)
2711 bcm_sysport_fini_tx_ring(priv, i);
2712 bcm_sysport_fini_rx_ring(priv);
2713
2714 /* Get prepared for Wake-on-LAN */
2715 if (device_may_wakeup(d) && priv->wolopts)
2716 ret = bcm_sysport_suspend_to_wol(priv);
2717
2718 return ret;
2719 }
2720
2721 static int __maybe_unused bcm_sysport_resume(struct device *d)
2722 {
2723 struct net_device *dev = dev_get_drvdata(d);
2724 struct bcm_sysport_priv *priv = netdev_priv(dev);
2725 unsigned int i;
2726 int ret;
2727
2728 if (!netif_running(dev))
2729 return 0;
2730
2731 umac_reset(priv);
2732
2733 /* We may have been suspended and never received a WOL event that
2734 * would turn off MPD detection, take care of that now
2735 */
2736 bcm_sysport_resume_from_wol(priv);
2737
2738 /* Initialize both hardware and software ring */
2739 for (i = 0; i < dev->num_tx_queues; i++) {
2740 ret = bcm_sysport_init_tx_ring(priv, i);
2741 if (ret) {
2742 netdev_err(dev, "failed to initialize TX ring %d\n",
2743 i);
2744 goto out_free_tx_rings;
2745 }
2746 }
2747
2748 /* Initialize linked-list */
2749 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2750
2751 /* Initialize RX ring */
2752 ret = bcm_sysport_init_rx_ring(priv);
2753 if (ret) {
2754 netdev_err(dev, "failed to initialize RX ring\n");
2755 goto out_free_rx_ring;
2756 }
2757
2758 /* RX pipe enable */
2759 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2760
2761 ret = rdma_enable_set(priv, 1);
2762 if (ret) {
2763 netdev_err(dev, "failed to enable RDMA\n");
2764 goto out_free_rx_ring;
2765 }
2766
2767 /* Restore enabled features */
2768 bcm_sysport_set_features(dev, dev->features);
2769
2770 rbuf_init(priv);
2771
2772 /* Set maximum frame length */
2773 if (!priv->is_lite)
2774 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2775 else
2776 gib_set_pad_extension(priv);
2777
2778 /* Set MAC address */
2779 umac_set_hw_addr(priv, dev->dev_addr);
2780
2781 umac_enable_set(priv, CMD_RX_EN, 1);
2782
2783 /* TX pipe enable */
2784 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2785
2786 umac_enable_set(priv, CMD_TX_EN, 1);
2787
2788 ret = tdma_enable_set(priv, 1);
2789 if (ret) {
2790 netdev_err(dev, "TDMA timeout!\n");
2791 goto out_free_rx_ring;
2792 }
2793
2794 phy_resume(dev->phydev);
2795
2796 bcm_sysport_netif_start(dev);
2797
2798 netif_device_attach(dev);
2799
2800 return 0;
2801
2802 out_free_rx_ring:
2803 bcm_sysport_fini_rx_ring(priv);
2804 out_free_tx_rings:
2805 for (i = 0; i < dev->num_tx_queues; i++)
2806 bcm_sysport_fini_tx_ring(priv, i);
2807 return ret;
2808 }
2809
2810 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2811 bcm_sysport_suspend, bcm_sysport_resume);
2812
2813 static struct platform_driver bcm_sysport_driver = {
2814 .probe = bcm_sysport_probe,
2815 .remove = bcm_sysport_remove,
2816 .driver = {
2817 .name = "brcm-systemport",
2818 .of_match_table = bcm_sysport_of_match,
2819 .pm = &bcm_sysport_pm_ops,
2820 },
2821 };
2822 module_platform_driver(bcm_sysport_driver);
2823
2824 MODULE_AUTHOR("Broadcom Corporation");
2825 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2826 MODULE_ALIAS("platform:brcm-systemport");
2827 MODULE_LICENSE("GPL");
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