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Merge tag 'riscv-for-linus-5.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
[thirdparty/linux.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->bus_info, "platform", sizeof(info->bus_info));
291 }
292
293 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
294 {
295 struct bcm_sysport_priv *priv = netdev_priv(dev);
296
297 return priv->msg_enable;
298 }
299
300 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
301 {
302 struct bcm_sysport_priv *priv = netdev_priv(dev);
303
304 priv->msg_enable = enable;
305 }
306
307 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
308 {
309 switch (type) {
310 case BCM_SYSPORT_STAT_NETDEV:
311 case BCM_SYSPORT_STAT_NETDEV64:
312 case BCM_SYSPORT_STAT_RXCHK:
313 case BCM_SYSPORT_STAT_RBUF:
314 case BCM_SYSPORT_STAT_SOFT:
315 return true;
316 default:
317 return false;
318 }
319 }
320
321 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
322 {
323 struct bcm_sysport_priv *priv = netdev_priv(dev);
324 const struct bcm_sysport_stats *s;
325 unsigned int i, j;
326
327 switch (string_set) {
328 case ETH_SS_STATS:
329 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
330 s = &bcm_sysport_gstrings_stats[i];
331 if (priv->is_lite &&
332 !bcm_sysport_lite_stat_valid(s->type))
333 continue;
334 j++;
335 }
336 /* Include per-queue statistics */
337 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
338 default:
339 return -EOPNOTSUPP;
340 }
341 }
342
343 static void bcm_sysport_get_strings(struct net_device *dev,
344 u32 stringset, u8 *data)
345 {
346 struct bcm_sysport_priv *priv = netdev_priv(dev);
347 const struct bcm_sysport_stats *s;
348 char buf[128];
349 int i, j;
350
351 switch (stringset) {
352 case ETH_SS_STATS:
353 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
354 s = &bcm_sysport_gstrings_stats[i];
355 if (priv->is_lite &&
356 !bcm_sysport_lite_stat_valid(s->type))
357 continue;
358
359 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
360 ETH_GSTRING_LEN);
361 j++;
362 }
363
364 for (i = 0; i < dev->num_tx_queues; i++) {
365 snprintf(buf, sizeof(buf), "txq%d_packets", i);
366 memcpy(data + j * ETH_GSTRING_LEN, buf,
367 ETH_GSTRING_LEN);
368 j++;
369
370 snprintf(buf, sizeof(buf), "txq%d_bytes", i);
371 memcpy(data + j * ETH_GSTRING_LEN, buf,
372 ETH_GSTRING_LEN);
373 j++;
374 }
375 break;
376 default:
377 break;
378 }
379 }
380
381 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
382 {
383 int i, j = 0;
384
385 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
386 const struct bcm_sysport_stats *s;
387 u8 offset = 0;
388 u32 val = 0;
389 char *p;
390
391 s = &bcm_sysport_gstrings_stats[i];
392 switch (s->type) {
393 case BCM_SYSPORT_STAT_NETDEV:
394 case BCM_SYSPORT_STAT_NETDEV64:
395 case BCM_SYSPORT_STAT_SOFT:
396 continue;
397 case BCM_SYSPORT_STAT_MIB_RX:
398 case BCM_SYSPORT_STAT_MIB_TX:
399 case BCM_SYSPORT_STAT_RUNT:
400 if (priv->is_lite)
401 continue;
402
403 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
404 offset = UMAC_MIB_STAT_OFFSET;
405 val = umac_readl(priv, UMAC_MIB_START + j + offset);
406 break;
407 case BCM_SYSPORT_STAT_RXCHK:
408 val = rxchk_readl(priv, s->reg_offset);
409 if (val == ~0)
410 rxchk_writel(priv, 0, s->reg_offset);
411 break;
412 case BCM_SYSPORT_STAT_RBUF:
413 val = rbuf_readl(priv, s->reg_offset);
414 if (val == ~0)
415 rbuf_writel(priv, 0, s->reg_offset);
416 break;
417 }
418
419 j += s->stat_sizeof;
420 p = (char *)priv + s->stat_offset;
421 *(u32 *)p = val;
422 }
423
424 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
425 }
426
427 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
428 u64 *tx_bytes, u64 *tx_packets)
429 {
430 struct bcm_sysport_tx_ring *ring;
431 u64 bytes = 0, packets = 0;
432 unsigned int start;
433 unsigned int q;
434
435 for (q = 0; q < priv->netdev->num_tx_queues; q++) {
436 ring = &priv->tx_rings[q];
437 do {
438 start = u64_stats_fetch_begin_irq(&priv->syncp);
439 bytes = ring->bytes;
440 packets = ring->packets;
441 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
442
443 *tx_bytes += bytes;
444 *tx_packets += packets;
445 }
446 }
447
448 static void bcm_sysport_get_stats(struct net_device *dev,
449 struct ethtool_stats *stats, u64 *data)
450 {
451 struct bcm_sysport_priv *priv = netdev_priv(dev);
452 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
453 struct u64_stats_sync *syncp = &priv->syncp;
454 struct bcm_sysport_tx_ring *ring;
455 u64 tx_bytes = 0, tx_packets = 0;
456 unsigned int start;
457 int i, j;
458
459 if (netif_running(dev)) {
460 bcm_sysport_update_mib_counters(priv);
461 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
462 stats64->tx_bytes = tx_bytes;
463 stats64->tx_packets = tx_packets;
464 }
465
466 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
467 const struct bcm_sysport_stats *s;
468 char *p;
469
470 s = &bcm_sysport_gstrings_stats[i];
471 if (s->type == BCM_SYSPORT_STAT_NETDEV)
472 p = (char *)&dev->stats;
473 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
474 p = (char *)stats64;
475 else
476 p = (char *)priv;
477
478 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
479 continue;
480 p += s->stat_offset;
481
482 if (s->stat_sizeof == sizeof(u64) &&
483 s->type == BCM_SYSPORT_STAT_NETDEV64) {
484 do {
485 start = u64_stats_fetch_begin_irq(syncp);
486 data[i] = *(u64 *)p;
487 } while (u64_stats_fetch_retry_irq(syncp, start));
488 } else
489 data[i] = *(u32 *)p;
490 j++;
491 }
492
493 /* For SYSTEMPORT Lite since we have holes in our statistics, j would
494 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
495 * needs to point to how many total statistics we have minus the
496 * number of per TX queue statistics
497 */
498 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
499 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
500
501 for (i = 0; i < dev->num_tx_queues; i++) {
502 ring = &priv->tx_rings[i];
503 data[j] = ring->packets;
504 j++;
505 data[j] = ring->bytes;
506 j++;
507 }
508 }
509
510 static void bcm_sysport_get_wol(struct net_device *dev,
511 struct ethtool_wolinfo *wol)
512 {
513 struct bcm_sysport_priv *priv = netdev_priv(dev);
514
515 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
516 wol->wolopts = priv->wolopts;
517
518 if (!(priv->wolopts & WAKE_MAGICSECURE))
519 return;
520
521 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
522 }
523
524 static int bcm_sysport_set_wol(struct net_device *dev,
525 struct ethtool_wolinfo *wol)
526 {
527 struct bcm_sysport_priv *priv = netdev_priv(dev);
528 struct device *kdev = &priv->pdev->dev;
529 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
530
531 if (!device_can_wakeup(kdev))
532 return -ENOTSUPP;
533
534 if (wol->wolopts & ~supported)
535 return -EINVAL;
536
537 if (wol->wolopts & WAKE_MAGICSECURE)
538 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
539
540 /* Flag the device and relevant IRQ as wakeup capable */
541 if (wol->wolopts) {
542 device_set_wakeup_enable(kdev, 1);
543 if (priv->wol_irq_disabled)
544 enable_irq_wake(priv->wol_irq);
545 priv->wol_irq_disabled = 0;
546 } else {
547 device_set_wakeup_enable(kdev, 0);
548 /* Avoid unbalanced disable_irq_wake calls */
549 if (!priv->wol_irq_disabled)
550 disable_irq_wake(priv->wol_irq);
551 priv->wol_irq_disabled = 1;
552 }
553
554 priv->wolopts = wol->wolopts;
555
556 return 0;
557 }
558
559 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
560 u32 usecs, u32 pkts)
561 {
562 u32 reg;
563
564 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
565 reg &= ~(RDMA_INTR_THRESH_MASK |
566 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
567 reg |= pkts;
568 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
569 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
570 }
571
572 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
573 struct ethtool_coalesce *ec)
574 {
575 struct bcm_sysport_priv *priv = ring->priv;
576 u32 reg;
577
578 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
579 reg &= ~(RING_INTR_THRESH_MASK |
580 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
581 reg |= ec->tx_max_coalesced_frames;
582 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
583 RING_TIMEOUT_SHIFT;
584 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
585 }
586
587 static int bcm_sysport_get_coalesce(struct net_device *dev,
588 struct ethtool_coalesce *ec)
589 {
590 struct bcm_sysport_priv *priv = netdev_priv(dev);
591 u32 reg;
592
593 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
594
595 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
596 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
597
598 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
599
600 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
601 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
602 ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
603
604 return 0;
605 }
606
607 static int bcm_sysport_set_coalesce(struct net_device *dev,
608 struct ethtool_coalesce *ec)
609 {
610 struct bcm_sysport_priv *priv = netdev_priv(dev);
611 struct dim_cq_moder moder;
612 u32 usecs, pkts;
613 unsigned int i;
614
615 /* Base system clock is 125Mhz, DMA timeout is this reference clock
616 * divided by 1024, which yield roughly 8.192 us, our maximum value has
617 * to fit in the RING_TIMEOUT_MASK (16 bits).
618 */
619 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
620 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
621 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
622 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
623 return -EINVAL;
624
625 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
626 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
627 return -EINVAL;
628
629 for (i = 0; i < dev->num_tx_queues; i++)
630 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
631
632 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
633 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
634 usecs = priv->rx_coalesce_usecs;
635 pkts = priv->rx_max_coalesced_frames;
636
637 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
638 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
639 usecs = moder.usec;
640 pkts = moder.pkts;
641 }
642
643 priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
644
645 /* Apply desired coalescing parameters */
646 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
647
648 return 0;
649 }
650
651 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
652 {
653 dev_consume_skb_any(cb->skb);
654 cb->skb = NULL;
655 dma_unmap_addr_set(cb, dma_addr, 0);
656 }
657
658 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
659 struct bcm_sysport_cb *cb)
660 {
661 struct device *kdev = &priv->pdev->dev;
662 struct net_device *ndev = priv->netdev;
663 struct sk_buff *skb, *rx_skb;
664 dma_addr_t mapping;
665
666 /* Allocate a new SKB for a new packet */
667 skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
668 GFP_ATOMIC | __GFP_NOWARN);
669 if (!skb) {
670 priv->mib.alloc_rx_buff_failed++;
671 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
672 return NULL;
673 }
674
675 mapping = dma_map_single(kdev, skb->data,
676 RX_BUF_LENGTH, DMA_FROM_DEVICE);
677 if (dma_mapping_error(kdev, mapping)) {
678 priv->mib.rx_dma_failed++;
679 dev_kfree_skb_any(skb);
680 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
681 return NULL;
682 }
683
684 /* Grab the current SKB on the ring */
685 rx_skb = cb->skb;
686 if (likely(rx_skb))
687 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
688 RX_BUF_LENGTH, DMA_FROM_DEVICE);
689
690 /* Put the new SKB on the ring */
691 cb->skb = skb;
692 dma_unmap_addr_set(cb, dma_addr, mapping);
693 dma_desc_set_addr(priv, cb->bd_addr, mapping);
694
695 netif_dbg(priv, rx_status, ndev, "RX refill\n");
696
697 /* Return the current SKB to the caller */
698 return rx_skb;
699 }
700
701 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
702 {
703 struct bcm_sysport_cb *cb;
704 struct sk_buff *skb;
705 unsigned int i;
706
707 for (i = 0; i < priv->num_rx_bds; i++) {
708 cb = &priv->rx_cbs[i];
709 skb = bcm_sysport_rx_refill(priv, cb);
710 dev_kfree_skb(skb);
711 if (!cb->skb)
712 return -ENOMEM;
713 }
714
715 return 0;
716 }
717
718 /* Poll the hardware for up to budget packets to process */
719 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
720 unsigned int budget)
721 {
722 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
723 struct net_device *ndev = priv->netdev;
724 unsigned int processed = 0, to_process;
725 unsigned int processed_bytes = 0;
726 struct bcm_sysport_cb *cb;
727 struct sk_buff *skb;
728 unsigned int p_index;
729 u16 len, status;
730 struct bcm_rsb *rsb;
731
732 /* Clear status before servicing to reduce spurious interrupts */
733 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
734
735 /* Determine how much we should process since last call, SYSTEMPORT Lite
736 * groups the producer and consumer indexes into the same 32-bit
737 * which we access using RDMA_CONS_INDEX
738 */
739 if (!priv->is_lite)
740 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
741 else
742 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
743 p_index &= RDMA_PROD_INDEX_MASK;
744
745 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
746
747 netif_dbg(priv, rx_status, ndev,
748 "p_index=%d rx_c_index=%d to_process=%d\n",
749 p_index, priv->rx_c_index, to_process);
750
751 while ((processed < to_process) && (processed < budget)) {
752 cb = &priv->rx_cbs[priv->rx_read_ptr];
753 skb = bcm_sysport_rx_refill(priv, cb);
754
755
756 /* We do not have a backing SKB, so we do not a corresponding
757 * DMA mapping for this incoming packet since
758 * bcm_sysport_rx_refill always either has both skb and mapping
759 * or none.
760 */
761 if (unlikely(!skb)) {
762 netif_err(priv, rx_err, ndev, "out of memory!\n");
763 ndev->stats.rx_dropped++;
764 ndev->stats.rx_errors++;
765 goto next;
766 }
767
768 /* Extract the Receive Status Block prepended */
769 rsb = (struct bcm_rsb *)skb->data;
770 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
771 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
772 DESC_STATUS_MASK;
773
774 netif_dbg(priv, rx_status, ndev,
775 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
776 p_index, priv->rx_c_index, priv->rx_read_ptr,
777 len, status);
778
779 if (unlikely(len > RX_BUF_LENGTH)) {
780 netif_err(priv, rx_status, ndev, "oversized packet\n");
781 ndev->stats.rx_length_errors++;
782 ndev->stats.rx_errors++;
783 dev_kfree_skb_any(skb);
784 goto next;
785 }
786
787 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
788 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
789 ndev->stats.rx_dropped++;
790 ndev->stats.rx_errors++;
791 dev_kfree_skb_any(skb);
792 goto next;
793 }
794
795 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
796 netif_err(priv, rx_err, ndev, "error packet\n");
797 if (status & RX_STATUS_OVFLOW)
798 ndev->stats.rx_over_errors++;
799 ndev->stats.rx_dropped++;
800 ndev->stats.rx_errors++;
801 dev_kfree_skb_any(skb);
802 goto next;
803 }
804
805 skb_put(skb, len);
806
807 /* Hardware validated our checksum */
808 if (likely(status & DESC_L4_CSUM))
809 skb->ip_summed = CHECKSUM_UNNECESSARY;
810
811 /* Hardware pre-pends packets with 2bytes before Ethernet
812 * header plus we have the Receive Status Block, strip off all
813 * of this from the SKB.
814 */
815 skb_pull(skb, sizeof(*rsb) + 2);
816 len -= (sizeof(*rsb) + 2);
817 processed_bytes += len;
818
819 /* UniMAC may forward CRC */
820 if (priv->crc_fwd) {
821 skb_trim(skb, len - ETH_FCS_LEN);
822 len -= ETH_FCS_LEN;
823 }
824
825 skb->protocol = eth_type_trans(skb, ndev);
826 ndev->stats.rx_packets++;
827 ndev->stats.rx_bytes += len;
828 u64_stats_update_begin(&priv->syncp);
829 stats64->rx_packets++;
830 stats64->rx_bytes += len;
831 u64_stats_update_end(&priv->syncp);
832
833 napi_gro_receive(&priv->napi, skb);
834 next:
835 processed++;
836 priv->rx_read_ptr++;
837
838 if (priv->rx_read_ptr == priv->num_rx_bds)
839 priv->rx_read_ptr = 0;
840 }
841
842 priv->dim.packets = processed;
843 priv->dim.bytes = processed_bytes;
844
845 return processed;
846 }
847
848 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
849 struct bcm_sysport_cb *cb,
850 unsigned int *bytes_compl,
851 unsigned int *pkts_compl)
852 {
853 struct bcm_sysport_priv *priv = ring->priv;
854 struct device *kdev = &priv->pdev->dev;
855
856 if (cb->skb) {
857 *bytes_compl += cb->skb->len;
858 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
859 dma_unmap_len(cb, dma_len),
860 DMA_TO_DEVICE);
861 (*pkts_compl)++;
862 bcm_sysport_free_cb(cb);
863 /* SKB fragment */
864 } else if (dma_unmap_addr(cb, dma_addr)) {
865 *bytes_compl += dma_unmap_len(cb, dma_len);
866 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
867 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
868 dma_unmap_addr_set(cb, dma_addr, 0);
869 }
870 }
871
872 /* Reclaim queued SKBs for transmission completion, lockless version */
873 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
874 struct bcm_sysport_tx_ring *ring)
875 {
876 unsigned int pkts_compl = 0, bytes_compl = 0;
877 struct net_device *ndev = priv->netdev;
878 unsigned int txbds_processed = 0;
879 struct bcm_sysport_cb *cb;
880 unsigned int txbds_ready;
881 unsigned int c_index;
882 u32 hw_ind;
883
884 /* Clear status before servicing to reduce spurious interrupts */
885 if (!ring->priv->is_lite)
886 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
887 else
888 intrl2_0_writel(ring->priv, BIT(ring->index +
889 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
890
891 /* Compute how many descriptors have been processed since last call */
892 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
893 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
894 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
895
896 netif_dbg(priv, tx_done, ndev,
897 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
898 ring->index, ring->c_index, c_index, txbds_ready);
899
900 while (txbds_processed < txbds_ready) {
901 cb = &ring->cbs[ring->clean_index];
902 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
903
904 ring->desc_count++;
905 txbds_processed++;
906
907 if (likely(ring->clean_index < ring->size - 1))
908 ring->clean_index++;
909 else
910 ring->clean_index = 0;
911 }
912
913 u64_stats_update_begin(&priv->syncp);
914 ring->packets += pkts_compl;
915 ring->bytes += bytes_compl;
916 u64_stats_update_end(&priv->syncp);
917
918 ring->c_index = c_index;
919
920 netif_dbg(priv, tx_done, ndev,
921 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
922 ring->index, ring->c_index, pkts_compl, bytes_compl);
923
924 return pkts_compl;
925 }
926
927 /* Locked version of the per-ring TX reclaim routine */
928 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
929 struct bcm_sysport_tx_ring *ring)
930 {
931 struct netdev_queue *txq;
932 unsigned int released;
933 unsigned long flags;
934
935 txq = netdev_get_tx_queue(priv->netdev, ring->index);
936
937 spin_lock_irqsave(&ring->lock, flags);
938 released = __bcm_sysport_tx_reclaim(priv, ring);
939 if (released)
940 netif_tx_wake_queue(txq);
941
942 spin_unlock_irqrestore(&ring->lock, flags);
943
944 return released;
945 }
946
947 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
948 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
949 struct bcm_sysport_tx_ring *ring)
950 {
951 unsigned long flags;
952
953 spin_lock_irqsave(&ring->lock, flags);
954 __bcm_sysport_tx_reclaim(priv, ring);
955 spin_unlock_irqrestore(&ring->lock, flags);
956 }
957
958 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
959 {
960 struct bcm_sysport_tx_ring *ring =
961 container_of(napi, struct bcm_sysport_tx_ring, napi);
962 unsigned int work_done = 0;
963
964 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
965
966 if (work_done == 0) {
967 napi_complete(napi);
968 /* re-enable TX interrupt */
969 if (!ring->priv->is_lite)
970 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
971 else
972 intrl2_0_mask_clear(ring->priv, BIT(ring->index +
973 INTRL2_0_TDMA_MBDONE_SHIFT));
974
975 return 0;
976 }
977
978 return budget;
979 }
980
981 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
982 {
983 unsigned int q;
984
985 for (q = 0; q < priv->netdev->num_tx_queues; q++)
986 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
987 }
988
989 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
990 {
991 struct bcm_sysport_priv *priv =
992 container_of(napi, struct bcm_sysport_priv, napi);
993 struct dim_sample dim_sample = {};
994 unsigned int work_done = 0;
995
996 work_done = bcm_sysport_desc_rx(priv, budget);
997
998 priv->rx_c_index += work_done;
999 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1000
1001 /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1002 * maintained by HW, but writes to it will be ignore while RDMA
1003 * is active
1004 */
1005 if (!priv->is_lite)
1006 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1007 else
1008 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1009
1010 if (work_done < budget) {
1011 napi_complete_done(napi, work_done);
1012 /* re-enable RX interrupts */
1013 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1014 }
1015
1016 if (priv->dim.use_dim) {
1017 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1018 priv->dim.bytes, &dim_sample);
1019 net_dim(&priv->dim.dim, dim_sample);
1020 }
1021
1022 return work_done;
1023 }
1024
1025 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1026 {
1027 u32 reg, bit;
1028
1029 reg = umac_readl(priv, UMAC_MPD_CTRL);
1030 if (enable)
1031 reg |= MPD_EN;
1032 else
1033 reg &= ~MPD_EN;
1034 umac_writel(priv, reg, UMAC_MPD_CTRL);
1035
1036 if (priv->is_lite)
1037 bit = RBUF_ACPI_EN_LITE;
1038 else
1039 bit = RBUF_ACPI_EN;
1040
1041 reg = rbuf_readl(priv, RBUF_CONTROL);
1042 if (enable)
1043 reg |= bit;
1044 else
1045 reg &= ~bit;
1046 rbuf_writel(priv, reg, RBUF_CONTROL);
1047 }
1048
1049 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1050 {
1051 unsigned int index;
1052 u32 reg;
1053
1054 /* Disable RXCHK, active filters and Broadcom tag matching */
1055 reg = rxchk_readl(priv, RXCHK_CONTROL);
1056 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1057 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1058 rxchk_writel(priv, reg, RXCHK_CONTROL);
1059
1060 /* Make sure we restore correct CID index in case HW lost
1061 * its context during deep idle state
1062 */
1063 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1064 rxchk_writel(priv, priv->filters_loc[index] <<
1065 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1066 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1067 }
1068
1069 /* Clear the MagicPacket detection logic */
1070 mpd_enable_set(priv, false);
1071
1072 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1073 if (reg & INTRL2_0_MPD)
1074 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1075
1076 if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1077 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1078 RXCHK_BRCM_TAG_MATCH_MASK;
1079 netdev_info(priv->netdev,
1080 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1081 }
1082
1083 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1084 }
1085
1086 static void bcm_sysport_dim_work(struct work_struct *work)
1087 {
1088 struct dim *dim = container_of(work, struct dim, work);
1089 struct bcm_sysport_net_dim *ndim =
1090 container_of(dim, struct bcm_sysport_net_dim, dim);
1091 struct bcm_sysport_priv *priv =
1092 container_of(ndim, struct bcm_sysport_priv, dim);
1093 struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1094 dim->profile_ix);
1095
1096 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1097 dim->state = DIM_START_MEASURE;
1098 }
1099
1100 /* RX and misc interrupt routine */
1101 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1102 {
1103 struct net_device *dev = dev_id;
1104 struct bcm_sysport_priv *priv = netdev_priv(dev);
1105 struct bcm_sysport_tx_ring *txr;
1106 unsigned int ring, ring_bit;
1107
1108 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1109 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1110 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1111
1112 if (unlikely(priv->irq0_stat == 0)) {
1113 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1114 return IRQ_NONE;
1115 }
1116
1117 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1118 priv->dim.event_ctr++;
1119 if (likely(napi_schedule_prep(&priv->napi))) {
1120 /* disable RX interrupts */
1121 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1122 __napi_schedule_irqoff(&priv->napi);
1123 }
1124 }
1125
1126 /* TX ring is full, perform a full reclaim since we do not know
1127 * which one would trigger this interrupt
1128 */
1129 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1130 bcm_sysport_tx_reclaim_all(priv);
1131
1132 if (!priv->is_lite)
1133 goto out;
1134
1135 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1136 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1137 if (!(priv->irq0_stat & ring_bit))
1138 continue;
1139
1140 txr = &priv->tx_rings[ring];
1141
1142 if (likely(napi_schedule_prep(&txr->napi))) {
1143 intrl2_0_mask_set(priv, ring_bit);
1144 __napi_schedule(&txr->napi);
1145 }
1146 }
1147 out:
1148 return IRQ_HANDLED;
1149 }
1150
1151 /* TX interrupt service routine */
1152 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1153 {
1154 struct net_device *dev = dev_id;
1155 struct bcm_sysport_priv *priv = netdev_priv(dev);
1156 struct bcm_sysport_tx_ring *txr;
1157 unsigned int ring;
1158
1159 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1160 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1161 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1162
1163 if (unlikely(priv->irq1_stat == 0)) {
1164 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1165 return IRQ_NONE;
1166 }
1167
1168 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1169 if (!(priv->irq1_stat & BIT(ring)))
1170 continue;
1171
1172 txr = &priv->tx_rings[ring];
1173
1174 if (likely(napi_schedule_prep(&txr->napi))) {
1175 intrl2_1_mask_set(priv, BIT(ring));
1176 __napi_schedule_irqoff(&txr->napi);
1177 }
1178 }
1179
1180 return IRQ_HANDLED;
1181 }
1182
1183 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1184 {
1185 struct bcm_sysport_priv *priv = dev_id;
1186
1187 pm_wakeup_event(&priv->pdev->dev, 0);
1188
1189 return IRQ_HANDLED;
1190 }
1191
1192 #ifdef CONFIG_NET_POLL_CONTROLLER
1193 static void bcm_sysport_poll_controller(struct net_device *dev)
1194 {
1195 struct bcm_sysport_priv *priv = netdev_priv(dev);
1196
1197 disable_irq(priv->irq0);
1198 bcm_sysport_rx_isr(priv->irq0, priv);
1199 enable_irq(priv->irq0);
1200
1201 if (!priv->is_lite) {
1202 disable_irq(priv->irq1);
1203 bcm_sysport_tx_isr(priv->irq1, priv);
1204 enable_irq(priv->irq1);
1205 }
1206 }
1207 #endif
1208
1209 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1210 struct net_device *dev)
1211 {
1212 struct bcm_sysport_priv *priv = netdev_priv(dev);
1213 struct sk_buff *nskb;
1214 struct bcm_tsb *tsb;
1215 u32 csum_info;
1216 u8 ip_proto;
1217 u16 csum_start;
1218 __be16 ip_ver;
1219
1220 /* Re-allocate SKB if needed */
1221 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1222 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1223 if (!nskb) {
1224 dev_kfree_skb_any(skb);
1225 priv->mib.tx_realloc_tsb_failed++;
1226 dev->stats.tx_errors++;
1227 dev->stats.tx_dropped++;
1228 return NULL;
1229 }
1230 dev_consume_skb_any(skb);
1231 skb = nskb;
1232 priv->mib.tx_realloc_tsb++;
1233 }
1234
1235 tsb = skb_push(skb, sizeof(*tsb));
1236 /* Zero-out TSB by default */
1237 memset(tsb, 0, sizeof(*tsb));
1238
1239 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1240 ip_ver = skb->protocol;
1241 switch (ip_ver) {
1242 case htons(ETH_P_IP):
1243 ip_proto = ip_hdr(skb)->protocol;
1244 break;
1245 case htons(ETH_P_IPV6):
1246 ip_proto = ipv6_hdr(skb)->nexthdr;
1247 break;
1248 default:
1249 return skb;
1250 }
1251
1252 /* Get the checksum offset and the L4 (transport) offset */
1253 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1254 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1255 csum_info |= (csum_start << L4_PTR_SHIFT);
1256
1257 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1258 csum_info |= L4_LENGTH_VALID;
1259 if (ip_proto == IPPROTO_UDP &&
1260 ip_ver == htons(ETH_P_IP))
1261 csum_info |= L4_UDP;
1262 } else {
1263 csum_info = 0;
1264 }
1265
1266 tsb->l4_ptr_dest_map = csum_info;
1267 }
1268
1269 return skb;
1270 }
1271
1272 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1273 struct net_device *dev)
1274 {
1275 struct bcm_sysport_priv *priv = netdev_priv(dev);
1276 struct device *kdev = &priv->pdev->dev;
1277 struct bcm_sysport_tx_ring *ring;
1278 struct bcm_sysport_cb *cb;
1279 struct netdev_queue *txq;
1280 u32 len_status, addr_lo;
1281 unsigned int skb_len;
1282 unsigned long flags;
1283 dma_addr_t mapping;
1284 u16 queue;
1285 int ret;
1286
1287 queue = skb_get_queue_mapping(skb);
1288 txq = netdev_get_tx_queue(dev, queue);
1289 ring = &priv->tx_rings[queue];
1290
1291 /* lock against tx reclaim in BH context and TX ring full interrupt */
1292 spin_lock_irqsave(&ring->lock, flags);
1293 if (unlikely(ring->desc_count == 0)) {
1294 netif_tx_stop_queue(txq);
1295 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1296 ret = NETDEV_TX_BUSY;
1297 goto out;
1298 }
1299
1300 /* Insert TSB and checksum infos */
1301 if (priv->tsb_en) {
1302 skb = bcm_sysport_insert_tsb(skb, dev);
1303 if (!skb) {
1304 ret = NETDEV_TX_OK;
1305 goto out;
1306 }
1307 }
1308
1309 skb_len = skb->len;
1310
1311 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1312 if (dma_mapping_error(kdev, mapping)) {
1313 priv->mib.tx_dma_failed++;
1314 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1315 skb->data, skb_len);
1316 ret = NETDEV_TX_OK;
1317 goto out;
1318 }
1319
1320 /* Remember the SKB for future freeing */
1321 cb = &ring->cbs[ring->curr_desc];
1322 cb->skb = skb;
1323 dma_unmap_addr_set(cb, dma_addr, mapping);
1324 dma_unmap_len_set(cb, dma_len, skb_len);
1325
1326 addr_lo = lower_32_bits(mapping);
1327 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1328 len_status |= (skb_len << DESC_LEN_SHIFT);
1329 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1330 DESC_STATUS_SHIFT;
1331 if (skb->ip_summed == CHECKSUM_PARTIAL)
1332 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1333
1334 ring->curr_desc++;
1335 if (ring->curr_desc == ring->size)
1336 ring->curr_desc = 0;
1337 ring->desc_count--;
1338
1339 /* Ports are latched, so write upper address first */
1340 tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1341 tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1342
1343 /* Check ring space and update SW control flow */
1344 if (ring->desc_count == 0)
1345 netif_tx_stop_queue(txq);
1346
1347 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1348 ring->index, ring->desc_count, ring->curr_desc);
1349
1350 ret = NETDEV_TX_OK;
1351 out:
1352 spin_unlock_irqrestore(&ring->lock, flags);
1353 return ret;
1354 }
1355
1356 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1357 {
1358 netdev_warn(dev, "transmit timeout!\n");
1359
1360 netif_trans_update(dev);
1361 dev->stats.tx_errors++;
1362
1363 netif_tx_wake_all_queues(dev);
1364 }
1365
1366 /* phylib adjust link callback */
1367 static void bcm_sysport_adj_link(struct net_device *dev)
1368 {
1369 struct bcm_sysport_priv *priv = netdev_priv(dev);
1370 struct phy_device *phydev = dev->phydev;
1371 unsigned int changed = 0;
1372 u32 cmd_bits = 0, reg;
1373
1374 if (priv->old_link != phydev->link) {
1375 changed = 1;
1376 priv->old_link = phydev->link;
1377 }
1378
1379 if (priv->old_duplex != phydev->duplex) {
1380 changed = 1;
1381 priv->old_duplex = phydev->duplex;
1382 }
1383
1384 if (priv->is_lite)
1385 goto out;
1386
1387 switch (phydev->speed) {
1388 case SPEED_2500:
1389 cmd_bits = CMD_SPEED_2500;
1390 break;
1391 case SPEED_1000:
1392 cmd_bits = CMD_SPEED_1000;
1393 break;
1394 case SPEED_100:
1395 cmd_bits = CMD_SPEED_100;
1396 break;
1397 case SPEED_10:
1398 cmd_bits = CMD_SPEED_10;
1399 break;
1400 default:
1401 break;
1402 }
1403 cmd_bits <<= CMD_SPEED_SHIFT;
1404
1405 if (phydev->duplex == DUPLEX_HALF)
1406 cmd_bits |= CMD_HD_EN;
1407
1408 if (priv->old_pause != phydev->pause) {
1409 changed = 1;
1410 priv->old_pause = phydev->pause;
1411 }
1412
1413 if (!phydev->pause)
1414 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1415
1416 if (!changed)
1417 return;
1418
1419 if (phydev->link) {
1420 reg = umac_readl(priv, UMAC_CMD);
1421 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1422 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1423 CMD_TX_PAUSE_IGNORE);
1424 reg |= cmd_bits;
1425 umac_writel(priv, reg, UMAC_CMD);
1426 }
1427 out:
1428 if (changed)
1429 phy_print_status(phydev);
1430 }
1431
1432 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1433 void (*cb)(struct work_struct *work))
1434 {
1435 struct bcm_sysport_net_dim *dim = &priv->dim;
1436
1437 INIT_WORK(&dim->dim.work, cb);
1438 dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1439 dim->event_ctr = 0;
1440 dim->packets = 0;
1441 dim->bytes = 0;
1442 }
1443
1444 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1445 {
1446 struct bcm_sysport_net_dim *dim = &priv->dim;
1447 struct dim_cq_moder moder;
1448 u32 usecs, pkts;
1449
1450 usecs = priv->rx_coalesce_usecs;
1451 pkts = priv->rx_max_coalesced_frames;
1452
1453 /* If DIM was enabled, re-apply default parameters */
1454 if (dim->use_dim) {
1455 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1456 usecs = moder.usec;
1457 pkts = moder.pkts;
1458 }
1459
1460 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1461 }
1462
1463 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1464 unsigned int index)
1465 {
1466 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1467 size_t size;
1468 u32 reg;
1469
1470 /* Simple descriptors partitioning for now */
1471 size = 256;
1472
1473 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1474 if (!ring->cbs) {
1475 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1476 return -ENOMEM;
1477 }
1478
1479 /* Initialize SW view of the ring */
1480 spin_lock_init(&ring->lock);
1481 ring->priv = priv;
1482 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1483 ring->index = index;
1484 ring->size = size;
1485 ring->clean_index = 0;
1486 ring->alloc_size = ring->size;
1487 ring->desc_count = ring->size;
1488 ring->curr_desc = 0;
1489
1490 /* Initialize HW ring */
1491 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1492 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1493 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1494 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1495
1496 /* Configure QID and port mapping */
1497 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1498 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1499 if (ring->inspect) {
1500 reg |= ring->switch_queue & RING_QID_MASK;
1501 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1502 } else {
1503 reg |= RING_IGNORE_STATUS;
1504 }
1505 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1506 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1507
1508 /* Enable ACB algorithm 2 */
1509 reg = tdma_readl(priv, TDMA_CONTROL);
1510 reg |= tdma_control_bit(priv, ACB_ALGO);
1511 tdma_writel(priv, reg, TDMA_CONTROL);
1512
1513 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1514 * with the original definition of ACB_ALGO
1515 */
1516 reg = tdma_readl(priv, TDMA_CONTROL);
1517 if (priv->is_lite)
1518 reg &= ~BIT(TSB_SWAP1);
1519 /* Set a correct TSB format based on host endian */
1520 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1521 reg |= tdma_control_bit(priv, TSB_SWAP0);
1522 else
1523 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1524 tdma_writel(priv, reg, TDMA_CONTROL);
1525
1526 /* Program the number of descriptors as MAX_THRESHOLD and half of
1527 * its size for the hysteresis trigger
1528 */
1529 tdma_writel(priv, ring->size |
1530 1 << RING_HYST_THRESH_SHIFT,
1531 TDMA_DESC_RING_MAX_HYST(index));
1532
1533 /* Enable the ring queue in the arbiter */
1534 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1535 reg |= (1 << index);
1536 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1537
1538 napi_enable(&ring->napi);
1539
1540 netif_dbg(priv, hw, priv->netdev,
1541 "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1542 ring->size, ring->switch_queue,
1543 ring->switch_port);
1544
1545 return 0;
1546 }
1547
1548 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1549 unsigned int index)
1550 {
1551 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1552 u32 reg;
1553
1554 /* Caller should stop the TDMA engine */
1555 reg = tdma_readl(priv, TDMA_STATUS);
1556 if (!(reg & TDMA_DISABLED))
1557 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1558
1559 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1560 * fail, so by checking this pointer we know whether the TX ring was
1561 * fully initialized or not.
1562 */
1563 if (!ring->cbs)
1564 return;
1565
1566 napi_disable(&ring->napi);
1567 netif_napi_del(&ring->napi);
1568
1569 bcm_sysport_tx_clean(priv, ring);
1570
1571 kfree(ring->cbs);
1572 ring->cbs = NULL;
1573 ring->size = 0;
1574 ring->alloc_size = 0;
1575
1576 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1577 }
1578
1579 /* RDMA helper */
1580 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1581 unsigned int enable)
1582 {
1583 unsigned int timeout = 1000;
1584 u32 reg;
1585
1586 reg = rdma_readl(priv, RDMA_CONTROL);
1587 if (enable)
1588 reg |= RDMA_EN;
1589 else
1590 reg &= ~RDMA_EN;
1591 rdma_writel(priv, reg, RDMA_CONTROL);
1592
1593 /* Poll for RMDA disabling completion */
1594 do {
1595 reg = rdma_readl(priv, RDMA_STATUS);
1596 if (!!(reg & RDMA_DISABLED) == !enable)
1597 return 0;
1598 usleep_range(1000, 2000);
1599 } while (timeout-- > 0);
1600
1601 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1602
1603 return -ETIMEDOUT;
1604 }
1605
1606 /* TDMA helper */
1607 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1608 unsigned int enable)
1609 {
1610 unsigned int timeout = 1000;
1611 u32 reg;
1612
1613 reg = tdma_readl(priv, TDMA_CONTROL);
1614 if (enable)
1615 reg |= tdma_control_bit(priv, TDMA_EN);
1616 else
1617 reg &= ~tdma_control_bit(priv, TDMA_EN);
1618 tdma_writel(priv, reg, TDMA_CONTROL);
1619
1620 /* Poll for TMDA disabling completion */
1621 do {
1622 reg = tdma_readl(priv, TDMA_STATUS);
1623 if (!!(reg & TDMA_DISABLED) == !enable)
1624 return 0;
1625
1626 usleep_range(1000, 2000);
1627 } while (timeout-- > 0);
1628
1629 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1630
1631 return -ETIMEDOUT;
1632 }
1633
1634 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1635 {
1636 struct bcm_sysport_cb *cb;
1637 u32 reg;
1638 int ret;
1639 int i;
1640
1641 /* Initialize SW view of the RX ring */
1642 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1643 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1644 priv->rx_c_index = 0;
1645 priv->rx_read_ptr = 0;
1646 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1647 GFP_KERNEL);
1648 if (!priv->rx_cbs) {
1649 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1650 return -ENOMEM;
1651 }
1652
1653 for (i = 0; i < priv->num_rx_bds; i++) {
1654 cb = priv->rx_cbs + i;
1655 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1656 }
1657
1658 ret = bcm_sysport_alloc_rx_bufs(priv);
1659 if (ret) {
1660 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1661 return ret;
1662 }
1663
1664 /* Initialize HW, ensure RDMA is disabled */
1665 reg = rdma_readl(priv, RDMA_STATUS);
1666 if (!(reg & RDMA_DISABLED))
1667 rdma_enable_set(priv, 0);
1668
1669 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1670 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1671 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1672 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1673 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1674 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1675 /* Operate the queue in ring mode */
1676 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1677 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1678 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1679 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1680
1681 netif_dbg(priv, hw, priv->netdev,
1682 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1683 priv->num_rx_bds, priv->rx_bds);
1684
1685 return 0;
1686 }
1687
1688 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1689 {
1690 struct bcm_sysport_cb *cb;
1691 unsigned int i;
1692 u32 reg;
1693
1694 /* Caller should ensure RDMA is disabled */
1695 reg = rdma_readl(priv, RDMA_STATUS);
1696 if (!(reg & RDMA_DISABLED))
1697 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1698
1699 for (i = 0; i < priv->num_rx_bds; i++) {
1700 cb = &priv->rx_cbs[i];
1701 if (dma_unmap_addr(cb, dma_addr))
1702 dma_unmap_single(&priv->pdev->dev,
1703 dma_unmap_addr(cb, dma_addr),
1704 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1705 bcm_sysport_free_cb(cb);
1706 }
1707
1708 kfree(priv->rx_cbs);
1709 priv->rx_cbs = NULL;
1710
1711 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1712 }
1713
1714 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1715 {
1716 struct bcm_sysport_priv *priv = netdev_priv(dev);
1717 u32 reg;
1718
1719 if (priv->is_lite)
1720 return;
1721
1722 reg = umac_readl(priv, UMAC_CMD);
1723 if (dev->flags & IFF_PROMISC)
1724 reg |= CMD_PROMISC;
1725 else
1726 reg &= ~CMD_PROMISC;
1727 umac_writel(priv, reg, UMAC_CMD);
1728
1729 /* No support for ALLMULTI */
1730 if (dev->flags & IFF_ALLMULTI)
1731 return;
1732 }
1733
1734 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1735 u32 mask, unsigned int enable)
1736 {
1737 u32 reg;
1738
1739 if (!priv->is_lite) {
1740 reg = umac_readl(priv, UMAC_CMD);
1741 if (enable)
1742 reg |= mask;
1743 else
1744 reg &= ~mask;
1745 umac_writel(priv, reg, UMAC_CMD);
1746 } else {
1747 reg = gib_readl(priv, GIB_CONTROL);
1748 if (enable)
1749 reg |= mask;
1750 else
1751 reg &= ~mask;
1752 gib_writel(priv, reg, GIB_CONTROL);
1753 }
1754
1755 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1756 * to be processed (1 msec).
1757 */
1758 if (enable == 0)
1759 usleep_range(1000, 2000);
1760 }
1761
1762 static inline void umac_reset(struct bcm_sysport_priv *priv)
1763 {
1764 u32 reg;
1765
1766 if (priv->is_lite)
1767 return;
1768
1769 reg = umac_readl(priv, UMAC_CMD);
1770 reg |= CMD_SW_RESET;
1771 umac_writel(priv, reg, UMAC_CMD);
1772 udelay(10);
1773 reg = umac_readl(priv, UMAC_CMD);
1774 reg &= ~CMD_SW_RESET;
1775 umac_writel(priv, reg, UMAC_CMD);
1776 }
1777
1778 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1779 unsigned char *addr)
1780 {
1781 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1782 addr[3];
1783 u32 mac1 = (addr[4] << 8) | addr[5];
1784
1785 if (!priv->is_lite) {
1786 umac_writel(priv, mac0, UMAC_MAC0);
1787 umac_writel(priv, mac1, UMAC_MAC1);
1788 } else {
1789 gib_writel(priv, mac0, GIB_MAC0);
1790 gib_writel(priv, mac1, GIB_MAC1);
1791 }
1792 }
1793
1794 static void topctrl_flush(struct bcm_sysport_priv *priv)
1795 {
1796 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1797 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1798 mdelay(1);
1799 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1800 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1801 }
1802
1803 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1804 {
1805 struct bcm_sysport_priv *priv = netdev_priv(dev);
1806 struct sockaddr *addr = p;
1807
1808 if (!is_valid_ether_addr(addr->sa_data))
1809 return -EINVAL;
1810
1811 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1812
1813 /* interface is disabled, changes to MAC will be reflected on next
1814 * open call
1815 */
1816 if (!netif_running(dev))
1817 return 0;
1818
1819 umac_set_hw_addr(priv, dev->dev_addr);
1820
1821 return 0;
1822 }
1823
1824 static void bcm_sysport_get_stats64(struct net_device *dev,
1825 struct rtnl_link_stats64 *stats)
1826 {
1827 struct bcm_sysport_priv *priv = netdev_priv(dev);
1828 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1829 unsigned int start;
1830
1831 netdev_stats_to_stats64(stats, &dev->stats);
1832
1833 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1834 &stats->tx_packets);
1835
1836 do {
1837 start = u64_stats_fetch_begin_irq(&priv->syncp);
1838 stats->rx_packets = stats64->rx_packets;
1839 stats->rx_bytes = stats64->rx_bytes;
1840 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1841 }
1842
1843 static void bcm_sysport_netif_start(struct net_device *dev)
1844 {
1845 struct bcm_sysport_priv *priv = netdev_priv(dev);
1846
1847 /* Enable NAPI */
1848 bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1849 bcm_sysport_init_rx_coalesce(priv);
1850 napi_enable(&priv->napi);
1851
1852 /* Enable RX interrupt and TX ring full interrupt */
1853 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1854
1855 phy_start(dev->phydev);
1856
1857 /* Enable TX interrupts for the TXQs */
1858 if (!priv->is_lite)
1859 intrl2_1_mask_clear(priv, 0xffffffff);
1860 else
1861 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1862 }
1863
1864 static void rbuf_init(struct bcm_sysport_priv *priv)
1865 {
1866 u32 reg;
1867
1868 reg = rbuf_readl(priv, RBUF_CONTROL);
1869 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1870 /* Set a correct RSB format on SYSTEMPORT Lite */
1871 if (priv->is_lite)
1872 reg &= ~RBUF_RSB_SWAP1;
1873
1874 /* Set a correct RSB format based on host endian */
1875 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1876 reg |= RBUF_RSB_SWAP0;
1877 else
1878 reg &= ~RBUF_RSB_SWAP0;
1879 rbuf_writel(priv, reg, RBUF_CONTROL);
1880 }
1881
1882 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1883 {
1884 intrl2_0_mask_set(priv, 0xffffffff);
1885 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1886 if (!priv->is_lite) {
1887 intrl2_1_mask_set(priv, 0xffffffff);
1888 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1889 }
1890 }
1891
1892 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1893 {
1894 u32 reg;
1895
1896 reg = gib_readl(priv, GIB_CONTROL);
1897 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1898 if (netdev_uses_dsa(priv->netdev)) {
1899 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1900 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1901 }
1902 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1903 reg |= 12 << GIB_IPG_LEN_SHIFT;
1904 gib_writel(priv, reg, GIB_CONTROL);
1905 }
1906
1907 static int bcm_sysport_open(struct net_device *dev)
1908 {
1909 struct bcm_sysport_priv *priv = netdev_priv(dev);
1910 struct phy_device *phydev;
1911 unsigned int i;
1912 int ret;
1913
1914 /* Reset UniMAC */
1915 umac_reset(priv);
1916
1917 /* Flush TX and RX FIFOs at TOPCTRL level */
1918 topctrl_flush(priv);
1919
1920 /* Disable the UniMAC RX/TX */
1921 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1922
1923 /* Enable RBUF 2bytes alignment and Receive Status Block */
1924 rbuf_init(priv);
1925
1926 /* Set maximum frame length */
1927 if (!priv->is_lite)
1928 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1929 else
1930 gib_set_pad_extension(priv);
1931
1932 /* Apply features again in case we changed them while interface was
1933 * down
1934 */
1935 bcm_sysport_set_features(dev, dev->features);
1936
1937 /* Set MAC address */
1938 umac_set_hw_addr(priv, dev->dev_addr);
1939
1940 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1941 0, priv->phy_interface);
1942 if (!phydev) {
1943 netdev_err(dev, "could not attach to PHY\n");
1944 return -ENODEV;
1945 }
1946
1947 /* Reset house keeping link status */
1948 priv->old_duplex = -1;
1949 priv->old_link = -1;
1950 priv->old_pause = -1;
1951
1952 /* mask all interrupts and request them */
1953 bcm_sysport_mask_all_intrs(priv);
1954
1955 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1956 if (ret) {
1957 netdev_err(dev, "failed to request RX interrupt\n");
1958 goto out_phy_disconnect;
1959 }
1960
1961 if (!priv->is_lite) {
1962 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1963 dev->name, dev);
1964 if (ret) {
1965 netdev_err(dev, "failed to request TX interrupt\n");
1966 goto out_free_irq0;
1967 }
1968 }
1969
1970 /* Initialize both hardware and software ring */
1971 for (i = 0; i < dev->num_tx_queues; i++) {
1972 ret = bcm_sysport_init_tx_ring(priv, i);
1973 if (ret) {
1974 netdev_err(dev, "failed to initialize TX ring %d\n",
1975 i);
1976 goto out_free_tx_ring;
1977 }
1978 }
1979
1980 /* Initialize linked-list */
1981 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1982
1983 /* Initialize RX ring */
1984 ret = bcm_sysport_init_rx_ring(priv);
1985 if (ret) {
1986 netdev_err(dev, "failed to initialize RX ring\n");
1987 goto out_free_rx_ring;
1988 }
1989
1990 /* Turn on RDMA */
1991 ret = rdma_enable_set(priv, 1);
1992 if (ret)
1993 goto out_free_rx_ring;
1994
1995 /* Turn on TDMA */
1996 ret = tdma_enable_set(priv, 1);
1997 if (ret)
1998 goto out_clear_rx_int;
1999
2000 /* Turn on UniMAC TX/RX */
2001 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2002
2003 bcm_sysport_netif_start(dev);
2004
2005 netif_tx_start_all_queues(dev);
2006
2007 return 0;
2008
2009 out_clear_rx_int:
2010 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2011 out_free_rx_ring:
2012 bcm_sysport_fini_rx_ring(priv);
2013 out_free_tx_ring:
2014 for (i = 0; i < dev->num_tx_queues; i++)
2015 bcm_sysport_fini_tx_ring(priv, i);
2016 if (!priv->is_lite)
2017 free_irq(priv->irq1, dev);
2018 out_free_irq0:
2019 free_irq(priv->irq0, dev);
2020 out_phy_disconnect:
2021 phy_disconnect(phydev);
2022 return ret;
2023 }
2024
2025 static void bcm_sysport_netif_stop(struct net_device *dev)
2026 {
2027 struct bcm_sysport_priv *priv = netdev_priv(dev);
2028
2029 /* stop all software from updating hardware */
2030 netif_tx_disable(dev);
2031 napi_disable(&priv->napi);
2032 cancel_work_sync(&priv->dim.dim.work);
2033 phy_stop(dev->phydev);
2034
2035 /* mask all interrupts */
2036 bcm_sysport_mask_all_intrs(priv);
2037 }
2038
2039 static int bcm_sysport_stop(struct net_device *dev)
2040 {
2041 struct bcm_sysport_priv *priv = netdev_priv(dev);
2042 unsigned int i;
2043 int ret;
2044
2045 bcm_sysport_netif_stop(dev);
2046
2047 /* Disable UniMAC RX */
2048 umac_enable_set(priv, CMD_RX_EN, 0);
2049
2050 ret = tdma_enable_set(priv, 0);
2051 if (ret) {
2052 netdev_err(dev, "timeout disabling RDMA\n");
2053 return ret;
2054 }
2055
2056 /* Wait for a maximum packet size to be drained */
2057 usleep_range(2000, 3000);
2058
2059 ret = rdma_enable_set(priv, 0);
2060 if (ret) {
2061 netdev_err(dev, "timeout disabling TDMA\n");
2062 return ret;
2063 }
2064
2065 /* Disable UniMAC TX */
2066 umac_enable_set(priv, CMD_TX_EN, 0);
2067
2068 /* Free RX/TX rings SW structures */
2069 for (i = 0; i < dev->num_tx_queues; i++)
2070 bcm_sysport_fini_tx_ring(priv, i);
2071 bcm_sysport_fini_rx_ring(priv);
2072
2073 free_irq(priv->irq0, dev);
2074 if (!priv->is_lite)
2075 free_irq(priv->irq1, dev);
2076
2077 /* Disconnect from PHY */
2078 phy_disconnect(dev->phydev);
2079
2080 return 0;
2081 }
2082
2083 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2084 u64 location)
2085 {
2086 unsigned int index;
2087 u32 reg;
2088
2089 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2090 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2091 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2092 reg &= RXCHK_BRCM_TAG_CID_MASK;
2093 if (reg == location)
2094 return index;
2095 }
2096
2097 return -EINVAL;
2098 }
2099
2100 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2101 struct ethtool_rxnfc *nfc)
2102 {
2103 int index;
2104
2105 /* This is not a rule that we know about */
2106 index = bcm_sysport_rule_find(priv, nfc->fs.location);
2107 if (index < 0)
2108 return -EOPNOTSUPP;
2109
2110 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2111
2112 return 0;
2113 }
2114
2115 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2116 struct ethtool_rxnfc *nfc)
2117 {
2118 unsigned int index;
2119 u32 reg;
2120
2121 /* We cannot match locations greater than what the classification ID
2122 * permits (256 entries)
2123 */
2124 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2125 return -E2BIG;
2126
2127 /* We cannot support flows that are not destined for a wake-up */
2128 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2129 return -EOPNOTSUPP;
2130
2131 /* All filters are already in use, we cannot match more rules */
2132 if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2133 RXCHK_BRCM_TAG_MAX)
2134 return -ENOSPC;
2135
2136 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2137 if (index >= RXCHK_BRCM_TAG_MAX)
2138 return -ENOSPC;
2139
2140 /* Location is the classification ID, and index is the position
2141 * within one of our 8 possible filters to be programmed
2142 */
2143 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2144 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2145 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2146 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2147 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2148
2149 priv->filters_loc[index] = nfc->fs.location;
2150 set_bit(index, priv->filters);
2151
2152 return 0;
2153 }
2154
2155 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2156 u64 location)
2157 {
2158 int index;
2159
2160 /* This is not a rule that we know about */
2161 index = bcm_sysport_rule_find(priv, location);
2162 if (index < 0)
2163 return -EOPNOTSUPP;
2164
2165 /* No need to disable this filter if it was enabled, this will
2166 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2167 */
2168 clear_bit(index, priv->filters);
2169 priv->filters_loc[index] = 0;
2170
2171 return 0;
2172 }
2173
2174 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2175 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2176 {
2177 struct bcm_sysport_priv *priv = netdev_priv(dev);
2178 int ret = -EOPNOTSUPP;
2179
2180 switch (nfc->cmd) {
2181 case ETHTOOL_GRXCLSRULE:
2182 ret = bcm_sysport_rule_get(priv, nfc);
2183 break;
2184 default:
2185 break;
2186 }
2187
2188 return ret;
2189 }
2190
2191 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2192 struct ethtool_rxnfc *nfc)
2193 {
2194 struct bcm_sysport_priv *priv = netdev_priv(dev);
2195 int ret = -EOPNOTSUPP;
2196
2197 switch (nfc->cmd) {
2198 case ETHTOOL_SRXCLSRLINS:
2199 ret = bcm_sysport_rule_set(priv, nfc);
2200 break;
2201 case ETHTOOL_SRXCLSRLDEL:
2202 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2203 break;
2204 default:
2205 break;
2206 }
2207
2208 return ret;
2209 }
2210
2211 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2212 .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2213 ETHTOOL_COALESCE_MAX_FRAMES |
2214 ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2215 .get_drvinfo = bcm_sysport_get_drvinfo,
2216 .get_msglevel = bcm_sysport_get_msglvl,
2217 .set_msglevel = bcm_sysport_set_msglvl,
2218 .get_link = ethtool_op_get_link,
2219 .get_strings = bcm_sysport_get_strings,
2220 .get_ethtool_stats = bcm_sysport_get_stats,
2221 .get_sset_count = bcm_sysport_get_sset_count,
2222 .get_wol = bcm_sysport_get_wol,
2223 .set_wol = bcm_sysport_set_wol,
2224 .get_coalesce = bcm_sysport_get_coalesce,
2225 .set_coalesce = bcm_sysport_set_coalesce,
2226 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2227 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2228 .get_rxnfc = bcm_sysport_get_rxnfc,
2229 .set_rxnfc = bcm_sysport_set_rxnfc,
2230 };
2231
2232 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2233 struct net_device *sb_dev)
2234 {
2235 struct bcm_sysport_priv *priv = netdev_priv(dev);
2236 u16 queue = skb_get_queue_mapping(skb);
2237 struct bcm_sysport_tx_ring *tx_ring;
2238 unsigned int q, port;
2239
2240 if (!netdev_uses_dsa(dev))
2241 return netdev_pick_tx(dev, skb, NULL);
2242
2243 /* DSA tagging layer will have configured the correct queue */
2244 q = BRCM_TAG_GET_QUEUE(queue);
2245 port = BRCM_TAG_GET_PORT(queue);
2246 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2247
2248 if (unlikely(!tx_ring))
2249 return netdev_pick_tx(dev, skb, NULL);
2250
2251 return tx_ring->index;
2252 }
2253
2254 static const struct net_device_ops bcm_sysport_netdev_ops = {
2255 .ndo_start_xmit = bcm_sysport_xmit,
2256 .ndo_tx_timeout = bcm_sysport_tx_timeout,
2257 .ndo_open = bcm_sysport_open,
2258 .ndo_stop = bcm_sysport_stop,
2259 .ndo_set_features = bcm_sysport_set_features,
2260 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
2261 .ndo_set_mac_address = bcm_sysport_change_mac,
2262 #ifdef CONFIG_NET_POLL_CONTROLLER
2263 .ndo_poll_controller = bcm_sysport_poll_controller,
2264 #endif
2265 .ndo_get_stats64 = bcm_sysport_get_stats64,
2266 .ndo_select_queue = bcm_sysport_select_queue,
2267 };
2268
2269 static int bcm_sysport_map_queues(struct notifier_block *nb,
2270 struct dsa_notifier_register_info *info)
2271 {
2272 struct bcm_sysport_tx_ring *ring;
2273 struct bcm_sysport_priv *priv;
2274 struct net_device *slave_dev;
2275 unsigned int num_tx_queues;
2276 unsigned int q, qp, port;
2277 struct net_device *dev;
2278
2279 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2280 if (priv->netdev != info->master)
2281 return 0;
2282
2283 dev = info->master;
2284
2285 /* We can't be setting up queue inspection for non directly attached
2286 * switches
2287 */
2288 if (info->switch_number)
2289 return 0;
2290
2291 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2292 return 0;
2293
2294 port = info->port_number;
2295 slave_dev = info->info.dev;
2296
2297 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2298 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2299 * per-port (slave_dev) network devices queue, we achieve just that.
2300 * This need to happen now before any slave network device is used such
2301 * it accurately reflects the number of real TX queues.
2302 */
2303 if (priv->is_lite)
2304 netif_set_real_num_tx_queues(slave_dev,
2305 slave_dev->num_tx_queues / 2);
2306
2307 num_tx_queues = slave_dev->real_num_tx_queues;
2308
2309 if (priv->per_port_num_tx_queues &&
2310 priv->per_port_num_tx_queues != num_tx_queues)
2311 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2312
2313 priv->per_port_num_tx_queues = num_tx_queues;
2314
2315 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2316 q++) {
2317 ring = &priv->tx_rings[q];
2318
2319 if (ring->inspect)
2320 continue;
2321
2322 /* Just remember the mapping actual programming done
2323 * during bcm_sysport_init_tx_ring
2324 */
2325 ring->switch_queue = qp;
2326 ring->switch_port = port;
2327 ring->inspect = true;
2328 priv->ring_map[qp + port * num_tx_queues] = ring;
2329 qp++;
2330 }
2331
2332 return 0;
2333 }
2334
2335 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2336 struct dsa_notifier_register_info *info)
2337 {
2338 struct bcm_sysport_tx_ring *ring;
2339 struct bcm_sysport_priv *priv;
2340 struct net_device *slave_dev;
2341 unsigned int num_tx_queues;
2342 struct net_device *dev;
2343 unsigned int q, qp, port;
2344
2345 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2346 if (priv->netdev != info->master)
2347 return 0;
2348
2349 dev = info->master;
2350
2351 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2352 return 0;
2353
2354 port = info->port_number;
2355 slave_dev = info->info.dev;
2356
2357 num_tx_queues = slave_dev->real_num_tx_queues;
2358
2359 for (q = 0; q < dev->num_tx_queues; q++) {
2360 ring = &priv->tx_rings[q];
2361
2362 if (ring->switch_port != port)
2363 continue;
2364
2365 if (!ring->inspect)
2366 continue;
2367
2368 ring->inspect = false;
2369 qp = ring->switch_queue;
2370 priv->ring_map[qp + port * num_tx_queues] = NULL;
2371 }
2372
2373 return 0;
2374 }
2375
2376 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2377 unsigned long event, void *ptr)
2378 {
2379 int ret = NOTIFY_DONE;
2380
2381 switch (event) {
2382 case DSA_PORT_REGISTER:
2383 ret = bcm_sysport_map_queues(nb, ptr);
2384 break;
2385 case DSA_PORT_UNREGISTER:
2386 ret = bcm_sysport_unmap_queues(nb, ptr);
2387 break;
2388 }
2389
2390 return notifier_from_errno(ret);
2391 }
2392
2393 #define REV_FMT "v%2x.%02x"
2394
2395 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2396 [SYSTEMPORT] = {
2397 .is_lite = false,
2398 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2399 },
2400 [SYSTEMPORT_LITE] = {
2401 .is_lite = true,
2402 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2403 },
2404 };
2405
2406 static const struct of_device_id bcm_sysport_of_match[] = {
2407 { .compatible = "brcm,systemportlite-v1.00",
2408 .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2409 { .compatible = "brcm,systemport-v1.00",
2410 .data = &bcm_sysport_params[SYSTEMPORT] },
2411 { .compatible = "brcm,systemport",
2412 .data = &bcm_sysport_params[SYSTEMPORT] },
2413 { /* sentinel */ }
2414 };
2415 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2416
2417 static int bcm_sysport_probe(struct platform_device *pdev)
2418 {
2419 const struct bcm_sysport_hw_params *params;
2420 const struct of_device_id *of_id = NULL;
2421 struct bcm_sysport_priv *priv;
2422 struct device_node *dn;
2423 struct net_device *dev;
2424 const void *macaddr;
2425 u32 txq, rxq;
2426 int ret;
2427
2428 dn = pdev->dev.of_node;
2429 of_id = of_match_node(bcm_sysport_of_match, dn);
2430 if (!of_id || !of_id->data)
2431 return -EINVAL;
2432
2433 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2434 if (ret)
2435 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2436 if (ret) {
2437 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2438 return ret;
2439 }
2440
2441 /* Fairly quickly we need to know the type of adapter we have */
2442 params = of_id->data;
2443
2444 /* Read the Transmit/Receive Queue properties */
2445 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2446 txq = TDMA_NUM_RINGS;
2447 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2448 rxq = 1;
2449
2450 /* Sanity check the number of transmit queues */
2451 if (!txq || txq > TDMA_NUM_RINGS)
2452 return -EINVAL;
2453
2454 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2455 if (!dev)
2456 return -ENOMEM;
2457
2458 /* Initialize private members */
2459 priv = netdev_priv(dev);
2460
2461 /* Allocate number of TX rings */
2462 priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2463 sizeof(struct bcm_sysport_tx_ring),
2464 GFP_KERNEL);
2465 if (!priv->tx_rings)
2466 return -ENOMEM;
2467
2468 priv->is_lite = params->is_lite;
2469 priv->num_rx_desc_words = params->num_rx_desc_words;
2470
2471 priv->irq0 = platform_get_irq(pdev, 0);
2472 if (!priv->is_lite) {
2473 priv->irq1 = platform_get_irq(pdev, 1);
2474 priv->wol_irq = platform_get_irq(pdev, 2);
2475 } else {
2476 priv->wol_irq = platform_get_irq(pdev, 1);
2477 }
2478 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2479 ret = -EINVAL;
2480 goto err_free_netdev;
2481 }
2482
2483 priv->base = devm_platform_ioremap_resource(pdev, 0);
2484 if (IS_ERR(priv->base)) {
2485 ret = PTR_ERR(priv->base);
2486 goto err_free_netdev;
2487 }
2488
2489 priv->netdev = dev;
2490 priv->pdev = pdev;
2491
2492 ret = of_get_phy_mode(dn, &priv->phy_interface);
2493 /* Default to GMII interface mode */
2494 if (ret)
2495 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2496
2497 /* In the case of a fixed PHY, the DT node associated
2498 * to the PHY is the Ethernet MAC DT node.
2499 */
2500 if (of_phy_is_fixed_link(dn)) {
2501 ret = of_phy_register_fixed_link(dn);
2502 if (ret) {
2503 dev_err(&pdev->dev, "failed to register fixed PHY\n");
2504 goto err_free_netdev;
2505 }
2506
2507 priv->phy_dn = dn;
2508 }
2509
2510 /* Initialize netdevice members */
2511 macaddr = of_get_mac_address(dn);
2512 if (IS_ERR(macaddr)) {
2513 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2514 eth_hw_addr_random(dev);
2515 } else {
2516 ether_addr_copy(dev->dev_addr, macaddr);
2517 }
2518
2519 SET_NETDEV_DEV(dev, &pdev->dev);
2520 dev_set_drvdata(&pdev->dev, dev);
2521 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2522 dev->netdev_ops = &bcm_sysport_netdev_ops;
2523 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2524
2525 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2526 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2527 dev->hw_features |= dev->features;
2528 dev->vlan_features |= dev->features;
2529
2530 /* Request the WOL interrupt and advertise suspend if available */
2531 priv->wol_irq_disabled = 1;
2532 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2533 bcm_sysport_wol_isr, 0, dev->name, priv);
2534 if (!ret)
2535 device_set_wakeup_capable(&pdev->dev, 1);
2536
2537 /* Set the needed headroom once and for all */
2538 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2539 dev->needed_headroom += sizeof(struct bcm_tsb);
2540
2541 /* libphy will adjust the link state accordingly */
2542 netif_carrier_off(dev);
2543
2544 priv->rx_max_coalesced_frames = 1;
2545 u64_stats_init(&priv->syncp);
2546
2547 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2548
2549 ret = register_dsa_notifier(&priv->dsa_notifier);
2550 if (ret) {
2551 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2552 goto err_deregister_fixed_link;
2553 }
2554
2555 ret = register_netdev(dev);
2556 if (ret) {
2557 dev_err(&pdev->dev, "failed to register net_device\n");
2558 goto err_deregister_notifier;
2559 }
2560
2561 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2562 dev_info(&pdev->dev,
2563 "Broadcom SYSTEMPORT%s " REV_FMT
2564 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2565 priv->is_lite ? " Lite" : "",
2566 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2567 priv->irq0, priv->irq1, txq, rxq);
2568
2569 return 0;
2570
2571 err_deregister_notifier:
2572 unregister_dsa_notifier(&priv->dsa_notifier);
2573 err_deregister_fixed_link:
2574 if (of_phy_is_fixed_link(dn))
2575 of_phy_deregister_fixed_link(dn);
2576 err_free_netdev:
2577 free_netdev(dev);
2578 return ret;
2579 }
2580
2581 static int bcm_sysport_remove(struct platform_device *pdev)
2582 {
2583 struct net_device *dev = dev_get_drvdata(&pdev->dev);
2584 struct bcm_sysport_priv *priv = netdev_priv(dev);
2585 struct device_node *dn = pdev->dev.of_node;
2586
2587 /* Not much to do, ndo_close has been called
2588 * and we use managed allocations
2589 */
2590 unregister_dsa_notifier(&priv->dsa_notifier);
2591 unregister_netdev(dev);
2592 if (of_phy_is_fixed_link(dn))
2593 of_phy_deregister_fixed_link(dn);
2594 free_netdev(dev);
2595 dev_set_drvdata(&pdev->dev, NULL);
2596
2597 return 0;
2598 }
2599
2600 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2601 {
2602 struct net_device *ndev = priv->netdev;
2603 unsigned int timeout = 1000;
2604 unsigned int index, i = 0;
2605 u32 reg;
2606
2607 reg = umac_readl(priv, UMAC_MPD_CTRL);
2608 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2609 reg |= MPD_EN;
2610 reg &= ~PSW_EN;
2611 if (priv->wolopts & WAKE_MAGICSECURE) {
2612 /* Program the SecureOn password */
2613 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2614 UMAC_PSW_MS);
2615 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2616 UMAC_PSW_LS);
2617 reg |= PSW_EN;
2618 }
2619 umac_writel(priv, reg, UMAC_MPD_CTRL);
2620
2621 if (priv->wolopts & WAKE_FILTER) {
2622 /* Turn on ACPI matching to steal packets from RBUF */
2623 reg = rbuf_readl(priv, RBUF_CONTROL);
2624 if (priv->is_lite)
2625 reg |= RBUF_ACPI_EN_LITE;
2626 else
2627 reg |= RBUF_ACPI_EN;
2628 rbuf_writel(priv, reg, RBUF_CONTROL);
2629
2630 /* Enable RXCHK, active filters and Broadcom tag matching */
2631 reg = rxchk_readl(priv, RXCHK_CONTROL);
2632 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2633 RXCHK_BRCM_TAG_MATCH_SHIFT);
2634 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2635 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2636 i++;
2637 }
2638 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2639 rxchk_writel(priv, reg, RXCHK_CONTROL);
2640 }
2641
2642 /* Make sure RBUF entered WoL mode as result */
2643 do {
2644 reg = rbuf_readl(priv, RBUF_STATUS);
2645 if (reg & RBUF_WOL_MODE)
2646 break;
2647
2648 udelay(10);
2649 } while (timeout-- > 0);
2650
2651 /* Do not leave the UniMAC RBUF matching only MPD packets */
2652 if (!timeout) {
2653 mpd_enable_set(priv, false);
2654 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2655 return -ETIMEDOUT;
2656 }
2657
2658 /* UniMAC receive needs to be turned on */
2659 umac_enable_set(priv, CMD_RX_EN, 1);
2660
2661 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2662
2663 return 0;
2664 }
2665
2666 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2667 {
2668 struct net_device *dev = dev_get_drvdata(d);
2669 struct bcm_sysport_priv *priv = netdev_priv(dev);
2670 unsigned int i;
2671 int ret = 0;
2672 u32 reg;
2673
2674 if (!netif_running(dev))
2675 return 0;
2676
2677 netif_device_detach(dev);
2678
2679 bcm_sysport_netif_stop(dev);
2680
2681 phy_suspend(dev->phydev);
2682
2683 /* Disable UniMAC RX */
2684 umac_enable_set(priv, CMD_RX_EN, 0);
2685
2686 ret = rdma_enable_set(priv, 0);
2687 if (ret) {
2688 netdev_err(dev, "RDMA timeout!\n");
2689 return ret;
2690 }
2691
2692 /* Disable RXCHK if enabled */
2693 if (priv->rx_chk_en) {
2694 reg = rxchk_readl(priv, RXCHK_CONTROL);
2695 reg &= ~RXCHK_EN;
2696 rxchk_writel(priv, reg, RXCHK_CONTROL);
2697 }
2698
2699 /* Flush RX pipe */
2700 if (!priv->wolopts)
2701 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2702
2703 ret = tdma_enable_set(priv, 0);
2704 if (ret) {
2705 netdev_err(dev, "TDMA timeout!\n");
2706 return ret;
2707 }
2708
2709 /* Wait for a packet boundary */
2710 usleep_range(2000, 3000);
2711
2712 umac_enable_set(priv, CMD_TX_EN, 0);
2713
2714 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2715
2716 /* Free RX/TX rings SW structures */
2717 for (i = 0; i < dev->num_tx_queues; i++)
2718 bcm_sysport_fini_tx_ring(priv, i);
2719 bcm_sysport_fini_rx_ring(priv);
2720
2721 /* Get prepared for Wake-on-LAN */
2722 if (device_may_wakeup(d) && priv->wolopts)
2723 ret = bcm_sysport_suspend_to_wol(priv);
2724
2725 return ret;
2726 }
2727
2728 static int __maybe_unused bcm_sysport_resume(struct device *d)
2729 {
2730 struct net_device *dev = dev_get_drvdata(d);
2731 struct bcm_sysport_priv *priv = netdev_priv(dev);
2732 unsigned int i;
2733 int ret;
2734
2735 if (!netif_running(dev))
2736 return 0;
2737
2738 umac_reset(priv);
2739
2740 /* Disable the UniMAC RX/TX */
2741 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2742
2743 /* We may have been suspended and never received a WOL event that
2744 * would turn off MPD detection, take care of that now
2745 */
2746 bcm_sysport_resume_from_wol(priv);
2747
2748 /* Initialize both hardware and software ring */
2749 for (i = 0; i < dev->num_tx_queues; i++) {
2750 ret = bcm_sysport_init_tx_ring(priv, i);
2751 if (ret) {
2752 netdev_err(dev, "failed to initialize TX ring %d\n",
2753 i);
2754 goto out_free_tx_rings;
2755 }
2756 }
2757
2758 /* Initialize linked-list */
2759 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2760
2761 /* Initialize RX ring */
2762 ret = bcm_sysport_init_rx_ring(priv);
2763 if (ret) {
2764 netdev_err(dev, "failed to initialize RX ring\n");
2765 goto out_free_rx_ring;
2766 }
2767
2768 /* RX pipe enable */
2769 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2770
2771 ret = rdma_enable_set(priv, 1);
2772 if (ret) {
2773 netdev_err(dev, "failed to enable RDMA\n");
2774 goto out_free_rx_ring;
2775 }
2776
2777 /* Restore enabled features */
2778 bcm_sysport_set_features(dev, dev->features);
2779
2780 rbuf_init(priv);
2781
2782 /* Set maximum frame length */
2783 if (!priv->is_lite)
2784 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2785 else
2786 gib_set_pad_extension(priv);
2787
2788 /* Set MAC address */
2789 umac_set_hw_addr(priv, dev->dev_addr);
2790
2791 umac_enable_set(priv, CMD_RX_EN, 1);
2792
2793 /* TX pipe enable */
2794 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2795
2796 umac_enable_set(priv, CMD_TX_EN, 1);
2797
2798 ret = tdma_enable_set(priv, 1);
2799 if (ret) {
2800 netdev_err(dev, "TDMA timeout!\n");
2801 goto out_free_rx_ring;
2802 }
2803
2804 phy_resume(dev->phydev);
2805
2806 bcm_sysport_netif_start(dev);
2807
2808 netif_device_attach(dev);
2809
2810 return 0;
2811
2812 out_free_rx_ring:
2813 bcm_sysport_fini_rx_ring(priv);
2814 out_free_tx_rings:
2815 for (i = 0; i < dev->num_tx_queues; i++)
2816 bcm_sysport_fini_tx_ring(priv, i);
2817 return ret;
2818 }
2819
2820 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2821 bcm_sysport_suspend, bcm_sysport_resume);
2822
2823 static struct platform_driver bcm_sysport_driver = {
2824 .probe = bcm_sysport_probe,
2825 .remove = bcm_sysport_remove,
2826 .driver = {
2827 .name = "brcm-systemport",
2828 .of_match_table = bcm_sysport_of_match,
2829 .pm = &bcm_sysport_pm_ops,
2830 },
2831 };
2832 module_platform_driver(bcm_sysport_driver);
2833
2834 MODULE_AUTHOR("Broadcom Corporation");
2835 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2836 MODULE_ALIAS("platform:brcm-systemport");
2837 MODULE_LICENSE("GPL");
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