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