1 // SPDX-License-Identifier: GPL-2.0-only
3 * Broadcom BCM7xxx System Port Ethernet MAC driver
5 * Copyright (C) 2014 Broadcom Corporation
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/init.h>
11 #include <linux/interrupt.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/netdevice.h>
15 #include <linux/etherdevice.h>
16 #include <linux/platform_device.h>
18 #include <linux/of_net.h>
19 #include <linux/of_mdio.h>
20 #include <linux/phy.h>
21 #include <linux/phy_fixed.h>
26 #include "bcmsysport.h"
28 /* I/O accessors register helpers */
29 #define BCM_SYSPORT_IO_MACRO(name, offset) \
30 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \
32 u32 reg = readl_relaxed(priv->base + offset + off); \
35 static inline void name##_writel(struct bcm_sysport_priv *priv, \
38 writel_relaxed(val, priv->base + offset + off); \
41 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
42 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
43 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
44 BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET);
45 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
46 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
47 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
48 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
49 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
50 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
52 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
53 * same layout, except it has been moved by 4 bytes up, *sigh*
55 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
57 if (priv->is_lite && off >= RDMA_STATUS)
59 return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
62 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
64 if (priv->is_lite && off >= RDMA_STATUS)
66 writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
69 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
81 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
82 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
84 #define BCM_SYSPORT_INTR_L2(which) \
85 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
88 priv->irq##which##_mask &= ~(mask); \
89 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
91 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
94 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
95 priv->irq##which##_mask |= (mask); \
98 BCM_SYSPORT_INTR_L2(0)
99 BCM_SYSPORT_INTR_L2(1)
101 /* Register accesses to GISB/RBUS registers are expensive (few hundred
102 * nanoseconds), so keep the check for 64-bits explicit here to save
103 * one register write per-packet on 32-bits platforms.
105 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
109 #ifdef CONFIG_PHYS_ADDR_T_64BIT
110 writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
111 d + DESC_ADDR_HI_STATUS_LEN);
113 writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
116 /* Ethtool operations */
117 static void bcm_sysport_set_rx_csum(struct net_device *dev,
118 netdev_features_t wanted)
120 struct bcm_sysport_priv *priv = netdev_priv(dev);
123 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
124 reg = rxchk_readl(priv, RXCHK_CONTROL);
125 /* Clear L2 header checks, which would prevent BPDUs
126 * from being received.
128 reg &= ~RXCHK_L2_HDR_DIS;
134 /* If UniMAC forwards CRC, we need to skip over it to get
135 * a valid CHK bit to be set in the per-packet status word
137 if (priv->rx_chk_en && priv->crc_fwd)
138 reg |= RXCHK_SKIP_FCS;
140 reg &= ~RXCHK_SKIP_FCS;
142 /* If Broadcom tags are enabled (e.g: using a switch), make
143 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
144 * tag after the Ethernet MAC Source Address.
146 if (netdev_uses_dsa(dev))
147 reg |= RXCHK_BRCM_TAG_EN;
149 reg &= ~RXCHK_BRCM_TAG_EN;
151 rxchk_writel(priv, reg, RXCHK_CONTROL);
154 static void bcm_sysport_set_tx_csum(struct net_device *dev,
155 netdev_features_t wanted)
157 struct bcm_sysport_priv *priv = netdev_priv(dev);
160 /* Hardware transmit checksum requires us to enable the Transmit status
161 * block prepended to the packet contents
163 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
164 reg = tdma_readl(priv, TDMA_CONTROL);
166 reg |= tdma_control_bit(priv, TSB_EN);
168 reg &= ~tdma_control_bit(priv, TSB_EN);
169 tdma_writel(priv, reg, TDMA_CONTROL);
172 static int bcm_sysport_set_features(struct net_device *dev,
173 netdev_features_t features)
175 struct bcm_sysport_priv *priv = netdev_priv(dev);
177 /* Read CRC forward */
179 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
181 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
182 GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
184 bcm_sysport_set_rx_csum(dev, features);
185 bcm_sysport_set_tx_csum(dev, features);
190 /* Hardware counters must be kept in sync because the order/offset
191 * is important here (order in structure declaration = order in hardware)
193 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
195 STAT_NETDEV64(rx_packets),
196 STAT_NETDEV64(tx_packets),
197 STAT_NETDEV64(rx_bytes),
198 STAT_NETDEV64(tx_bytes),
199 STAT_NETDEV(rx_errors),
200 STAT_NETDEV(tx_errors),
201 STAT_NETDEV(rx_dropped),
202 STAT_NETDEV(tx_dropped),
203 STAT_NETDEV(multicast),
204 /* UniMAC RSV counters */
205 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
206 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
207 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
208 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
209 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
210 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
211 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
212 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
213 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
214 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
215 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
216 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
217 STAT_MIB_RX("rx_multicast", mib.rx.mca),
218 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
219 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
220 STAT_MIB_RX("rx_control", mib.rx.cf),
221 STAT_MIB_RX("rx_pause", mib.rx.pf),
222 STAT_MIB_RX("rx_unknown", mib.rx.uo),
223 STAT_MIB_RX("rx_align", mib.rx.aln),
224 STAT_MIB_RX("rx_outrange", mib.rx.flr),
225 STAT_MIB_RX("rx_code", mib.rx.cde),
226 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
227 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
228 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
229 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
230 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
231 STAT_MIB_RX("rx_unicast", mib.rx.uc),
232 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
233 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
234 /* UniMAC TSV counters */
235 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
236 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
237 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
238 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
239 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
240 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
241 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
242 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
243 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
244 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
245 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
246 STAT_MIB_TX("tx_multicast", mib.tx.mca),
247 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
248 STAT_MIB_TX("tx_pause", mib.tx.pf),
249 STAT_MIB_TX("tx_control", mib.tx.cf),
250 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
251 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
252 STAT_MIB_TX("tx_defer", mib.tx.drf),
253 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
254 STAT_MIB_TX("tx_single_col", mib.tx.scl),
255 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
256 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
257 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
258 STAT_MIB_TX("tx_frags", mib.tx.frg),
259 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
260 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
261 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
262 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
263 STAT_MIB_TX("tx_unicast", mib.tx.uc),
264 /* UniMAC RUNT counters */
265 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
266 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
267 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
268 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
269 /* RXCHK misc statistics */
270 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
271 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
272 RXCHK_OTHER_DISC_CNTR),
273 /* RBUF misc statistics */
274 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
275 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
276 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
277 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
278 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
279 STAT_MIB_SOFT("tx_realloc_tsb", mib.tx_realloc_tsb),
280 STAT_MIB_SOFT("tx_realloc_tsb_failed", mib.tx_realloc_tsb_failed),
281 /* Per TX-queue statistics are dynamically appended */
284 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
286 static void bcm_sysport_get_drvinfo(struct net_device *dev,
287 struct ethtool_drvinfo *info)
289 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
290 strlcpy(info->version, "0.1", sizeof(info->version));
291 strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
294 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
296 struct bcm_sysport_priv *priv = netdev_priv(dev);
298 return priv->msg_enable;
301 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
303 struct bcm_sysport_priv *priv = netdev_priv(dev);
305 priv->msg_enable = enable;
308 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
311 case BCM_SYSPORT_STAT_NETDEV:
312 case BCM_SYSPORT_STAT_NETDEV64:
313 case BCM_SYSPORT_STAT_RXCHK:
314 case BCM_SYSPORT_STAT_RBUF:
315 case BCM_SYSPORT_STAT_SOFT:
322 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
324 struct bcm_sysport_priv *priv = netdev_priv(dev);
325 const struct bcm_sysport_stats *s;
328 switch (string_set) {
330 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
331 s = &bcm_sysport_gstrings_stats[i];
333 !bcm_sysport_lite_stat_valid(s->type))
337 /* Include per-queue statistics */
338 return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
344 static void bcm_sysport_get_strings(struct net_device *dev,
345 u32 stringset, u8 *data)
347 struct bcm_sysport_priv *priv = netdev_priv(dev);
348 const struct bcm_sysport_stats *s;
354 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
355 s = &bcm_sysport_gstrings_stats[i];
357 !bcm_sysport_lite_stat_valid(s->type))
360 memcpy(data + j * ETH_GSTRING_LEN, s->stat_string,
365 for (i = 0; i < dev->num_tx_queues; i++) {
366 snprintf(buf, sizeof(buf), "txq%d_packets", i);
367 memcpy(data + j * ETH_GSTRING_LEN, buf,
371 snprintf(buf, sizeof(buf), "txq%d_bytes", i);
372 memcpy(data + j * ETH_GSTRING_LEN, buf,
382 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
386 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
387 const struct bcm_sysport_stats *s;
392 s = &bcm_sysport_gstrings_stats[i];
394 case BCM_SYSPORT_STAT_NETDEV:
395 case BCM_SYSPORT_STAT_NETDEV64:
396 case BCM_SYSPORT_STAT_SOFT:
398 case BCM_SYSPORT_STAT_MIB_RX:
399 case BCM_SYSPORT_STAT_MIB_TX:
400 case BCM_SYSPORT_STAT_RUNT:
404 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
405 offset = UMAC_MIB_STAT_OFFSET;
406 val = umac_readl(priv, UMAC_MIB_START + j + offset);
408 case BCM_SYSPORT_STAT_RXCHK:
409 val = rxchk_readl(priv, s->reg_offset);
411 rxchk_writel(priv, 0, s->reg_offset);
413 case BCM_SYSPORT_STAT_RBUF:
414 val = rbuf_readl(priv, s->reg_offset);
416 rbuf_writel(priv, 0, s->reg_offset);
421 p = (char *)priv + s->stat_offset;
425 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
428 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
429 u64 *tx_bytes, u64 *tx_packets)
431 struct bcm_sysport_tx_ring *ring;
432 u64 bytes = 0, packets = 0;
436 for (q = 0; q < priv->netdev->num_tx_queues; q++) {
437 ring = &priv->tx_rings[q];
439 start = u64_stats_fetch_begin_irq(&priv->syncp);
441 packets = ring->packets;
442 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
445 *tx_packets += packets;
449 static void bcm_sysport_get_stats(struct net_device *dev,
450 struct ethtool_stats *stats, u64 *data)
452 struct bcm_sysport_priv *priv = netdev_priv(dev);
453 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
454 struct u64_stats_sync *syncp = &priv->syncp;
455 struct bcm_sysport_tx_ring *ring;
456 u64 tx_bytes = 0, tx_packets = 0;
460 if (netif_running(dev)) {
461 bcm_sysport_update_mib_counters(priv);
462 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
463 stats64->tx_bytes = tx_bytes;
464 stats64->tx_packets = tx_packets;
467 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
468 const struct bcm_sysport_stats *s;
471 s = &bcm_sysport_gstrings_stats[i];
472 if (s->type == BCM_SYSPORT_STAT_NETDEV)
473 p = (char *)&dev->stats;
474 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
479 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
483 if (s->stat_sizeof == sizeof(u64) &&
484 s->type == BCM_SYSPORT_STAT_NETDEV64) {
486 start = u64_stats_fetch_begin_irq(syncp);
488 } while (u64_stats_fetch_retry_irq(syncp, start));
494 /* For SYSTEMPORT Lite since we have holes in our statistics, j would
495 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
496 * needs to point to how many total statistics we have minus the
497 * number of per TX queue statistics
499 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
500 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
502 for (i = 0; i < dev->num_tx_queues; i++) {
503 ring = &priv->tx_rings[i];
504 data[j] = ring->packets;
506 data[j] = ring->bytes;
511 static void bcm_sysport_get_wol(struct net_device *dev,
512 struct ethtool_wolinfo *wol)
514 struct bcm_sysport_priv *priv = netdev_priv(dev);
516 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
517 wol->wolopts = priv->wolopts;
519 if (!(priv->wolopts & WAKE_MAGICSECURE))
522 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
525 static int bcm_sysport_set_wol(struct net_device *dev,
526 struct ethtool_wolinfo *wol)
528 struct bcm_sysport_priv *priv = netdev_priv(dev);
529 struct device *kdev = &priv->pdev->dev;
530 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
532 if (!device_can_wakeup(kdev))
535 if (wol->wolopts & ~supported)
538 if (wol->wolopts & WAKE_MAGICSECURE)
539 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
541 /* Flag the device and relevant IRQ as wakeup capable */
543 device_set_wakeup_enable(kdev, 1);
544 if (priv->wol_irq_disabled)
545 enable_irq_wake(priv->wol_irq);
546 priv->wol_irq_disabled = 0;
548 device_set_wakeup_enable(kdev, 0);
549 /* Avoid unbalanced disable_irq_wake calls */
550 if (!priv->wol_irq_disabled)
551 disable_irq_wake(priv->wol_irq);
552 priv->wol_irq_disabled = 1;
555 priv->wolopts = wol->wolopts;
560 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
565 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
566 reg &= ~(RDMA_INTR_THRESH_MASK |
567 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
569 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
570 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
573 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
574 struct ethtool_coalesce *ec)
576 struct bcm_sysport_priv *priv = ring->priv;
579 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
580 reg &= ~(RING_INTR_THRESH_MASK |
581 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
582 reg |= ec->tx_max_coalesced_frames;
583 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
585 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
588 static int bcm_sysport_get_coalesce(struct net_device *dev,
589 struct ethtool_coalesce *ec)
591 struct bcm_sysport_priv *priv = netdev_priv(dev);
594 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
596 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
597 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
599 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
601 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
602 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
603 ec->use_adaptive_rx_coalesce = priv->dim.use_dim;
608 static int bcm_sysport_set_coalesce(struct net_device *dev,
609 struct ethtool_coalesce *ec)
611 struct bcm_sysport_priv *priv = netdev_priv(dev);
612 struct dim_cq_moder moder;
616 /* Base system clock is 125Mhz, DMA timeout is this reference clock
617 * divided by 1024, which yield roughly 8.192 us, our maximum value has
618 * to fit in the RING_TIMEOUT_MASK (16 bits).
620 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
621 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
622 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
623 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
626 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
627 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0) ||
628 ec->use_adaptive_tx_coalesce)
631 for (i = 0; i < dev->num_tx_queues; i++)
632 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
634 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
635 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
636 usecs = priv->rx_coalesce_usecs;
637 pkts = priv->rx_max_coalesced_frames;
639 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
640 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
645 priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
647 /* Apply desired coalescing parameters */
648 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
653 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
655 dev_consume_skb_any(cb->skb);
657 dma_unmap_addr_set(cb, dma_addr, 0);
660 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
661 struct bcm_sysport_cb *cb)
663 struct device *kdev = &priv->pdev->dev;
664 struct net_device *ndev = priv->netdev;
665 struct sk_buff *skb, *rx_skb;
668 /* Allocate a new SKB for a new packet */
669 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
671 priv->mib.alloc_rx_buff_failed++;
672 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
676 mapping = dma_map_single(kdev, skb->data,
677 RX_BUF_LENGTH, DMA_FROM_DEVICE);
678 if (dma_mapping_error(kdev, mapping)) {
679 priv->mib.rx_dma_failed++;
680 dev_kfree_skb_any(skb);
681 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
685 /* Grab the current SKB on the ring */
688 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
689 RX_BUF_LENGTH, DMA_FROM_DEVICE);
691 /* Put the new SKB on the ring */
693 dma_unmap_addr_set(cb, dma_addr, mapping);
694 dma_desc_set_addr(priv, cb->bd_addr, mapping);
696 netif_dbg(priv, rx_status, ndev, "RX refill\n");
698 /* Return the current SKB to the caller */
702 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
704 struct bcm_sysport_cb *cb;
708 for (i = 0; i < priv->num_rx_bds; i++) {
709 cb = &priv->rx_cbs[i];
710 skb = bcm_sysport_rx_refill(priv, cb);
719 /* Poll the hardware for up to budget packets to process */
720 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
723 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
724 struct net_device *ndev = priv->netdev;
725 unsigned int processed = 0, to_process;
726 unsigned int processed_bytes = 0;
727 struct bcm_sysport_cb *cb;
729 unsigned int p_index;
733 /* Clear status before servicing to reduce spurious interrupts */
734 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
736 /* Determine how much we should process since last call, SYSTEMPORT Lite
737 * groups the producer and consumer indexes into the same 32-bit
738 * which we access using RDMA_CONS_INDEX
741 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
743 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
744 p_index &= RDMA_PROD_INDEX_MASK;
746 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
748 netif_dbg(priv, rx_status, ndev,
749 "p_index=%d rx_c_index=%d to_process=%d\n",
750 p_index, priv->rx_c_index, to_process);
752 while ((processed < to_process) && (processed < budget)) {
753 cb = &priv->rx_cbs[priv->rx_read_ptr];
754 skb = bcm_sysport_rx_refill(priv, cb);
757 /* We do not have a backing SKB, so we do not a corresponding
758 * DMA mapping for this incoming packet since
759 * bcm_sysport_rx_refill always either has both skb and mapping
762 if (unlikely(!skb)) {
763 netif_err(priv, rx_err, ndev, "out of memory!\n");
764 ndev->stats.rx_dropped++;
765 ndev->stats.rx_errors++;
769 /* Extract the Receive Status Block prepended */
770 rsb = (struct bcm_rsb *)skb->data;
771 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
772 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
775 netif_dbg(priv, rx_status, ndev,
776 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
777 p_index, priv->rx_c_index, priv->rx_read_ptr,
780 if (unlikely(len > RX_BUF_LENGTH)) {
781 netif_err(priv, rx_status, ndev, "oversized packet\n");
782 ndev->stats.rx_length_errors++;
783 ndev->stats.rx_errors++;
784 dev_kfree_skb_any(skb);
788 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
789 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
790 ndev->stats.rx_dropped++;
791 ndev->stats.rx_errors++;
792 dev_kfree_skb_any(skb);
796 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
797 netif_err(priv, rx_err, ndev, "error packet\n");
798 if (status & RX_STATUS_OVFLOW)
799 ndev->stats.rx_over_errors++;
800 ndev->stats.rx_dropped++;
801 ndev->stats.rx_errors++;
802 dev_kfree_skb_any(skb);
808 /* Hardware validated our checksum */
809 if (likely(status & DESC_L4_CSUM))
810 skb->ip_summed = CHECKSUM_UNNECESSARY;
812 /* Hardware pre-pends packets with 2bytes before Ethernet
813 * header plus we have the Receive Status Block, strip off all
814 * of this from the SKB.
816 skb_pull(skb, sizeof(*rsb) + 2);
817 len -= (sizeof(*rsb) + 2);
818 processed_bytes += len;
820 /* UniMAC may forward CRC */
822 skb_trim(skb, len - ETH_FCS_LEN);
826 skb->protocol = eth_type_trans(skb, ndev);
827 ndev->stats.rx_packets++;
828 ndev->stats.rx_bytes += len;
829 u64_stats_update_begin(&priv->syncp);
830 stats64->rx_packets++;
831 stats64->rx_bytes += len;
832 u64_stats_update_end(&priv->syncp);
834 napi_gro_receive(&priv->napi, skb);
839 if (priv->rx_read_ptr == priv->num_rx_bds)
840 priv->rx_read_ptr = 0;
843 priv->dim.packets = processed;
844 priv->dim.bytes = processed_bytes;
849 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
850 struct bcm_sysport_cb *cb,
851 unsigned int *bytes_compl,
852 unsigned int *pkts_compl)
854 struct bcm_sysport_priv *priv = ring->priv;
855 struct device *kdev = &priv->pdev->dev;
858 *bytes_compl += cb->skb->len;
859 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
860 dma_unmap_len(cb, dma_len),
863 bcm_sysport_free_cb(cb);
865 } else if (dma_unmap_addr(cb, dma_addr)) {
866 *bytes_compl += dma_unmap_len(cb, dma_len);
867 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
868 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
869 dma_unmap_addr_set(cb, dma_addr, 0);
873 /* Reclaim queued SKBs for transmission completion, lockless version */
874 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
875 struct bcm_sysport_tx_ring *ring)
877 unsigned int pkts_compl = 0, bytes_compl = 0;
878 struct net_device *ndev = priv->netdev;
879 unsigned int txbds_processed = 0;
880 struct bcm_sysport_cb *cb;
881 unsigned int txbds_ready;
882 unsigned int c_index;
885 /* Clear status before servicing to reduce spurious interrupts */
886 if (!ring->priv->is_lite)
887 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
889 intrl2_0_writel(ring->priv, BIT(ring->index +
890 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
892 /* Compute how many descriptors have been processed since last call */
893 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
894 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
895 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
897 netif_dbg(priv, tx_done, ndev,
898 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
899 ring->index, ring->c_index, c_index, txbds_ready);
901 while (txbds_processed < txbds_ready) {
902 cb = &ring->cbs[ring->clean_index];
903 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
908 if (likely(ring->clean_index < ring->size - 1))
911 ring->clean_index = 0;
914 u64_stats_update_begin(&priv->syncp);
915 ring->packets += pkts_compl;
916 ring->bytes += bytes_compl;
917 u64_stats_update_end(&priv->syncp);
919 ring->c_index = c_index;
921 netif_dbg(priv, tx_done, ndev,
922 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
923 ring->index, ring->c_index, pkts_compl, bytes_compl);
928 /* Locked version of the per-ring TX reclaim routine */
929 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
930 struct bcm_sysport_tx_ring *ring)
932 struct netdev_queue *txq;
933 unsigned int released;
936 txq = netdev_get_tx_queue(priv->netdev, ring->index);
938 spin_lock_irqsave(&ring->lock, flags);
939 released = __bcm_sysport_tx_reclaim(priv, ring);
941 netif_tx_wake_queue(txq);
943 spin_unlock_irqrestore(&ring->lock, flags);
948 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
949 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
950 struct bcm_sysport_tx_ring *ring)
954 spin_lock_irqsave(&ring->lock, flags);
955 __bcm_sysport_tx_reclaim(priv, ring);
956 spin_unlock_irqrestore(&ring->lock, flags);
959 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
961 struct bcm_sysport_tx_ring *ring =
962 container_of(napi, struct bcm_sysport_tx_ring, napi);
963 unsigned int work_done = 0;
965 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
967 if (work_done == 0) {
969 /* re-enable TX interrupt */
970 if (!ring->priv->is_lite)
971 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
973 intrl2_0_mask_clear(ring->priv, BIT(ring->index +
974 INTRL2_0_TDMA_MBDONE_SHIFT));
982 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
986 for (q = 0; q < priv->netdev->num_tx_queues; q++)
987 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
990 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
992 struct bcm_sysport_priv *priv =
993 container_of(napi, struct bcm_sysport_priv, napi);
994 struct dim_sample dim_sample = {};
995 unsigned int work_done = 0;
997 work_done = bcm_sysport_desc_rx(priv, budget);
999 priv->rx_c_index += work_done;
1000 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1002 /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1003 * maintained by HW, but writes to it will be ignore while RDMA
1007 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1009 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1011 if (work_done < budget) {
1012 napi_complete_done(napi, work_done);
1013 /* re-enable RX interrupts */
1014 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1017 if (priv->dim.use_dim) {
1018 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1019 priv->dim.bytes, &dim_sample);
1020 net_dim(&priv->dim.dim, dim_sample);
1026 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1030 reg = umac_readl(priv, UMAC_MPD_CTRL);
1035 umac_writel(priv, reg, UMAC_MPD_CTRL);
1038 bit = RBUF_ACPI_EN_LITE;
1042 reg = rbuf_readl(priv, RBUF_CONTROL);
1047 rbuf_writel(priv, reg, RBUF_CONTROL);
1050 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1055 /* Disable RXCHK, active filters and Broadcom tag matching */
1056 reg = rxchk_readl(priv, RXCHK_CONTROL);
1057 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1058 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1059 rxchk_writel(priv, reg, RXCHK_CONTROL);
1061 /* Make sure we restore correct CID index in case HW lost
1062 * its context during deep idle state
1064 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1065 rxchk_writel(priv, priv->filters_loc[index] <<
1066 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1067 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1070 /* Clear the MagicPacket detection logic */
1071 mpd_enable_set(priv, false);
1073 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1074 if (reg & INTRL2_0_MPD)
1075 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1077 if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1078 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1079 RXCHK_BRCM_TAG_MATCH_MASK;
1080 netdev_info(priv->netdev,
1081 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1084 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1087 static void bcm_sysport_dim_work(struct work_struct *work)
1089 struct dim *dim = container_of(work, struct dim, work);
1090 struct bcm_sysport_net_dim *ndim =
1091 container_of(dim, struct bcm_sysport_net_dim, dim);
1092 struct bcm_sysport_priv *priv =
1093 container_of(ndim, struct bcm_sysport_priv, dim);
1094 struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1097 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1098 dim->state = DIM_START_MEASURE;
1101 /* RX and misc interrupt routine */
1102 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1104 struct net_device *dev = dev_id;
1105 struct bcm_sysport_priv *priv = netdev_priv(dev);
1106 struct bcm_sysport_tx_ring *txr;
1107 unsigned int ring, ring_bit;
1109 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1110 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1111 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1113 if (unlikely(priv->irq0_stat == 0)) {
1114 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1118 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1119 priv->dim.event_ctr++;
1120 if (likely(napi_schedule_prep(&priv->napi))) {
1121 /* disable RX interrupts */
1122 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1123 __napi_schedule_irqoff(&priv->napi);
1127 /* TX ring is full, perform a full reclaim since we do not know
1128 * which one would trigger this interrupt
1130 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1131 bcm_sysport_tx_reclaim_all(priv);
1136 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1137 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1138 if (!(priv->irq0_stat & ring_bit))
1141 txr = &priv->tx_rings[ring];
1143 if (likely(napi_schedule_prep(&txr->napi))) {
1144 intrl2_0_mask_set(priv, ring_bit);
1145 __napi_schedule(&txr->napi);
1152 /* TX interrupt service routine */
1153 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1155 struct net_device *dev = dev_id;
1156 struct bcm_sysport_priv *priv = netdev_priv(dev);
1157 struct bcm_sysport_tx_ring *txr;
1160 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1161 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1162 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1164 if (unlikely(priv->irq1_stat == 0)) {
1165 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1169 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1170 if (!(priv->irq1_stat & BIT(ring)))
1173 txr = &priv->tx_rings[ring];
1175 if (likely(napi_schedule_prep(&txr->napi))) {
1176 intrl2_1_mask_set(priv, BIT(ring));
1177 __napi_schedule_irqoff(&txr->napi);
1184 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1186 struct bcm_sysport_priv *priv = dev_id;
1188 pm_wakeup_event(&priv->pdev->dev, 0);
1193 #ifdef CONFIG_NET_POLL_CONTROLLER
1194 static void bcm_sysport_poll_controller(struct net_device *dev)
1196 struct bcm_sysport_priv *priv = netdev_priv(dev);
1198 disable_irq(priv->irq0);
1199 bcm_sysport_rx_isr(priv->irq0, priv);
1200 enable_irq(priv->irq0);
1202 if (!priv->is_lite) {
1203 disable_irq(priv->irq1);
1204 bcm_sysport_tx_isr(priv->irq1, priv);
1205 enable_irq(priv->irq1);
1210 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1211 struct net_device *dev)
1213 struct bcm_sysport_priv *priv = netdev_priv(dev);
1214 struct sk_buff *nskb;
1215 struct bcm_tsb *tsb;
1221 /* Re-allocate SKB if needed */
1222 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1223 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1225 dev_kfree_skb_any(skb);
1226 priv->mib.tx_realloc_tsb_failed++;
1227 dev->stats.tx_errors++;
1228 dev->stats.tx_dropped++;
1231 dev_consume_skb_any(skb);
1233 priv->mib.tx_realloc_tsb++;
1236 tsb = skb_push(skb, sizeof(*tsb));
1237 /* Zero-out TSB by default */
1238 memset(tsb, 0, sizeof(*tsb));
1240 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1241 ip_ver = skb->protocol;
1243 case htons(ETH_P_IP):
1244 ip_proto = ip_hdr(skb)->protocol;
1246 case htons(ETH_P_IPV6):
1247 ip_proto = ipv6_hdr(skb)->nexthdr;
1253 /* Get the checksum offset and the L4 (transport) offset */
1254 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1255 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1256 csum_info |= (csum_start << L4_PTR_SHIFT);
1258 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1259 csum_info |= L4_LENGTH_VALID;
1260 if (ip_proto == IPPROTO_UDP &&
1261 ip_ver == htons(ETH_P_IP))
1262 csum_info |= L4_UDP;
1267 tsb->l4_ptr_dest_map = csum_info;
1273 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1274 struct net_device *dev)
1276 struct bcm_sysport_priv *priv = netdev_priv(dev);
1277 struct device *kdev = &priv->pdev->dev;
1278 struct bcm_sysport_tx_ring *ring;
1279 struct bcm_sysport_cb *cb;
1280 struct netdev_queue *txq;
1281 u32 len_status, addr_lo;
1282 unsigned int skb_len;
1283 unsigned long flags;
1288 queue = skb_get_queue_mapping(skb);
1289 txq = netdev_get_tx_queue(dev, queue);
1290 ring = &priv->tx_rings[queue];
1292 /* lock against tx reclaim in BH context and TX ring full interrupt */
1293 spin_lock_irqsave(&ring->lock, flags);
1294 if (unlikely(ring->desc_count == 0)) {
1295 netif_tx_stop_queue(txq);
1296 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1297 ret = NETDEV_TX_BUSY;
1301 /* Insert TSB and checksum infos */
1303 skb = bcm_sysport_insert_tsb(skb, dev);
1312 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1313 if (dma_mapping_error(kdev, mapping)) {
1314 priv->mib.tx_dma_failed++;
1315 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1316 skb->data, skb_len);
1321 /* Remember the SKB for future freeing */
1322 cb = &ring->cbs[ring->curr_desc];
1324 dma_unmap_addr_set(cb, dma_addr, mapping);
1325 dma_unmap_len_set(cb, dma_len, skb_len);
1327 addr_lo = lower_32_bits(mapping);
1328 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1329 len_status |= (skb_len << DESC_LEN_SHIFT);
1330 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1332 if (skb->ip_summed == CHECKSUM_PARTIAL)
1333 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1336 if (ring->curr_desc == ring->size)
1337 ring->curr_desc = 0;
1340 /* Ports are latched, so write upper address first */
1341 tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1342 tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1344 /* Check ring space and update SW control flow */
1345 if (ring->desc_count == 0)
1346 netif_tx_stop_queue(txq);
1348 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1349 ring->index, ring->desc_count, ring->curr_desc);
1353 spin_unlock_irqrestore(&ring->lock, flags);
1357 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1359 netdev_warn(dev, "transmit timeout!\n");
1361 netif_trans_update(dev);
1362 dev->stats.tx_errors++;
1364 netif_tx_wake_all_queues(dev);
1367 /* phylib adjust link callback */
1368 static void bcm_sysport_adj_link(struct net_device *dev)
1370 struct bcm_sysport_priv *priv = netdev_priv(dev);
1371 struct phy_device *phydev = dev->phydev;
1372 unsigned int changed = 0;
1373 u32 cmd_bits = 0, reg;
1375 if (priv->old_link != phydev->link) {
1377 priv->old_link = phydev->link;
1380 if (priv->old_duplex != phydev->duplex) {
1382 priv->old_duplex = phydev->duplex;
1388 switch (phydev->speed) {
1390 cmd_bits = CMD_SPEED_2500;
1393 cmd_bits = CMD_SPEED_1000;
1396 cmd_bits = CMD_SPEED_100;
1399 cmd_bits = CMD_SPEED_10;
1404 cmd_bits <<= CMD_SPEED_SHIFT;
1406 if (phydev->duplex == DUPLEX_HALF)
1407 cmd_bits |= CMD_HD_EN;
1409 if (priv->old_pause != phydev->pause) {
1411 priv->old_pause = phydev->pause;
1415 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1421 reg = umac_readl(priv, UMAC_CMD);
1422 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1423 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1424 CMD_TX_PAUSE_IGNORE);
1426 umac_writel(priv, reg, UMAC_CMD);
1430 phy_print_status(phydev);
1433 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1434 void (*cb)(struct work_struct *work))
1436 struct bcm_sysport_net_dim *dim = &priv->dim;
1438 INIT_WORK(&dim->dim.work, cb);
1439 dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1445 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1447 struct bcm_sysport_net_dim *dim = &priv->dim;
1448 struct dim_cq_moder moder;
1451 usecs = priv->rx_coalesce_usecs;
1452 pkts = priv->rx_max_coalesced_frames;
1454 /* If DIM was enabled, re-apply default parameters */
1456 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1461 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1464 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1467 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1471 /* Simple descriptors partitioning for now */
1474 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1476 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1480 /* Initialize SW view of the ring */
1481 spin_lock_init(&ring->lock);
1483 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1484 ring->index = index;
1486 ring->clean_index = 0;
1487 ring->alloc_size = ring->size;
1488 ring->desc_count = ring->size;
1489 ring->curr_desc = 0;
1491 /* Initialize HW ring */
1492 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1493 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1494 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1495 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1497 /* Configure QID and port mapping */
1498 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1499 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1500 if (ring->inspect) {
1501 reg |= ring->switch_queue & RING_QID_MASK;
1502 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1504 reg |= RING_IGNORE_STATUS;
1506 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1507 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1509 /* Enable ACB algorithm 2 */
1510 reg = tdma_readl(priv, TDMA_CONTROL);
1511 reg |= tdma_control_bit(priv, ACB_ALGO);
1512 tdma_writel(priv, reg, TDMA_CONTROL);
1514 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1515 * with the original definition of ACB_ALGO
1517 reg = tdma_readl(priv, TDMA_CONTROL);
1519 reg &= ~BIT(TSB_SWAP1);
1520 /* Set a correct TSB format based on host endian */
1521 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1522 reg |= tdma_control_bit(priv, TSB_SWAP0);
1524 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1525 tdma_writel(priv, reg, TDMA_CONTROL);
1527 /* Program the number of descriptors as MAX_THRESHOLD and half of
1528 * its size for the hysteresis trigger
1530 tdma_writel(priv, ring->size |
1531 1 << RING_HYST_THRESH_SHIFT,
1532 TDMA_DESC_RING_MAX_HYST(index));
1534 /* Enable the ring queue in the arbiter */
1535 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1536 reg |= (1 << index);
1537 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1539 napi_enable(&ring->napi);
1541 netif_dbg(priv, hw, priv->netdev,
1542 "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1543 ring->size, ring->switch_queue,
1549 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1552 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1555 /* Caller should stop the TDMA engine */
1556 reg = tdma_readl(priv, TDMA_STATUS);
1557 if (!(reg & TDMA_DISABLED))
1558 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1560 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1561 * fail, so by checking this pointer we know whether the TX ring was
1562 * fully initialized or not.
1567 napi_disable(&ring->napi);
1568 netif_napi_del(&ring->napi);
1570 bcm_sysport_tx_clean(priv, ring);
1575 ring->alloc_size = 0;
1577 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1581 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1582 unsigned int enable)
1584 unsigned int timeout = 1000;
1587 reg = rdma_readl(priv, RDMA_CONTROL);
1592 rdma_writel(priv, reg, RDMA_CONTROL);
1594 /* Poll for RMDA disabling completion */
1596 reg = rdma_readl(priv, RDMA_STATUS);
1597 if (!!(reg & RDMA_DISABLED) == !enable)
1599 usleep_range(1000, 2000);
1600 } while (timeout-- > 0);
1602 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1608 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1609 unsigned int enable)
1611 unsigned int timeout = 1000;
1614 reg = tdma_readl(priv, TDMA_CONTROL);
1616 reg |= tdma_control_bit(priv, TDMA_EN);
1618 reg &= ~tdma_control_bit(priv, TDMA_EN);
1619 tdma_writel(priv, reg, TDMA_CONTROL);
1621 /* Poll for TMDA disabling completion */
1623 reg = tdma_readl(priv, TDMA_STATUS);
1624 if (!!(reg & TDMA_DISABLED) == !enable)
1627 usleep_range(1000, 2000);
1628 } while (timeout-- > 0);
1630 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1635 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1637 struct bcm_sysport_cb *cb;
1642 /* Initialize SW view of the RX ring */
1643 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1644 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1645 priv->rx_c_index = 0;
1646 priv->rx_read_ptr = 0;
1647 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1649 if (!priv->rx_cbs) {
1650 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1654 for (i = 0; i < priv->num_rx_bds; i++) {
1655 cb = priv->rx_cbs + i;
1656 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1659 ret = bcm_sysport_alloc_rx_bufs(priv);
1661 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1665 /* Initialize HW, ensure RDMA is disabled */
1666 reg = rdma_readl(priv, RDMA_STATUS);
1667 if (!(reg & RDMA_DISABLED))
1668 rdma_enable_set(priv, 0);
1670 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1671 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1672 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1673 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1674 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1675 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1676 /* Operate the queue in ring mode */
1677 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1678 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1679 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1680 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1682 netif_dbg(priv, hw, priv->netdev,
1683 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1684 priv->num_rx_bds, priv->rx_bds);
1689 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1691 struct bcm_sysport_cb *cb;
1695 /* Caller should ensure RDMA is disabled */
1696 reg = rdma_readl(priv, RDMA_STATUS);
1697 if (!(reg & RDMA_DISABLED))
1698 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1700 for (i = 0; i < priv->num_rx_bds; i++) {
1701 cb = &priv->rx_cbs[i];
1702 if (dma_unmap_addr(cb, dma_addr))
1703 dma_unmap_single(&priv->pdev->dev,
1704 dma_unmap_addr(cb, dma_addr),
1705 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1706 bcm_sysport_free_cb(cb);
1709 kfree(priv->rx_cbs);
1710 priv->rx_cbs = NULL;
1712 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1715 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1717 struct bcm_sysport_priv *priv = netdev_priv(dev);
1723 reg = umac_readl(priv, UMAC_CMD);
1724 if (dev->flags & IFF_PROMISC)
1727 reg &= ~CMD_PROMISC;
1728 umac_writel(priv, reg, UMAC_CMD);
1730 /* No support for ALLMULTI */
1731 if (dev->flags & IFF_ALLMULTI)
1735 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1736 u32 mask, unsigned int enable)
1740 if (!priv->is_lite) {
1741 reg = umac_readl(priv, UMAC_CMD);
1746 umac_writel(priv, reg, UMAC_CMD);
1748 reg = gib_readl(priv, GIB_CONTROL);
1753 gib_writel(priv, reg, GIB_CONTROL);
1756 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1757 * to be processed (1 msec).
1760 usleep_range(1000, 2000);
1763 static inline void umac_reset(struct bcm_sysport_priv *priv)
1770 reg = umac_readl(priv, UMAC_CMD);
1771 reg |= CMD_SW_RESET;
1772 umac_writel(priv, reg, UMAC_CMD);
1774 reg = umac_readl(priv, UMAC_CMD);
1775 reg &= ~CMD_SW_RESET;
1776 umac_writel(priv, reg, UMAC_CMD);
1779 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1780 unsigned char *addr)
1782 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1784 u32 mac1 = (addr[4] << 8) | addr[5];
1786 if (!priv->is_lite) {
1787 umac_writel(priv, mac0, UMAC_MAC0);
1788 umac_writel(priv, mac1, UMAC_MAC1);
1790 gib_writel(priv, mac0, GIB_MAC0);
1791 gib_writel(priv, mac1, GIB_MAC1);
1795 static void topctrl_flush(struct bcm_sysport_priv *priv)
1797 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1798 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1800 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1801 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1804 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1806 struct bcm_sysport_priv *priv = netdev_priv(dev);
1807 struct sockaddr *addr = p;
1809 if (!is_valid_ether_addr(addr->sa_data))
1812 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1814 /* interface is disabled, changes to MAC will be reflected on next
1817 if (!netif_running(dev))
1820 umac_set_hw_addr(priv, dev->dev_addr);
1825 static void bcm_sysport_get_stats64(struct net_device *dev,
1826 struct rtnl_link_stats64 *stats)
1828 struct bcm_sysport_priv *priv = netdev_priv(dev);
1829 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1832 netdev_stats_to_stats64(stats, &dev->stats);
1834 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1835 &stats->tx_packets);
1838 start = u64_stats_fetch_begin_irq(&priv->syncp);
1839 stats->rx_packets = stats64->rx_packets;
1840 stats->rx_bytes = stats64->rx_bytes;
1841 } while (u64_stats_fetch_retry_irq(&priv->syncp, start));
1844 static void bcm_sysport_netif_start(struct net_device *dev)
1846 struct bcm_sysport_priv *priv = netdev_priv(dev);
1849 bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1850 bcm_sysport_init_rx_coalesce(priv);
1851 napi_enable(&priv->napi);
1853 /* Enable RX interrupt and TX ring full interrupt */
1854 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1856 phy_start(dev->phydev);
1858 /* Enable TX interrupts for the TXQs */
1860 intrl2_1_mask_clear(priv, 0xffffffff);
1862 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1865 static void rbuf_init(struct bcm_sysport_priv *priv)
1869 reg = rbuf_readl(priv, RBUF_CONTROL);
1870 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1871 /* Set a correct RSB format on SYSTEMPORT Lite */
1873 reg &= ~RBUF_RSB_SWAP1;
1875 /* Set a correct RSB format based on host endian */
1876 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1877 reg |= RBUF_RSB_SWAP0;
1879 reg &= ~RBUF_RSB_SWAP0;
1880 rbuf_writel(priv, reg, RBUF_CONTROL);
1883 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1885 intrl2_0_mask_set(priv, 0xffffffff);
1886 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1887 if (!priv->is_lite) {
1888 intrl2_1_mask_set(priv, 0xffffffff);
1889 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1893 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1897 reg = gib_readl(priv, GIB_CONTROL);
1898 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1899 if (netdev_uses_dsa(priv->netdev)) {
1900 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1901 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1903 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1904 reg |= 12 << GIB_IPG_LEN_SHIFT;
1905 gib_writel(priv, reg, GIB_CONTROL);
1908 static int bcm_sysport_open(struct net_device *dev)
1910 struct bcm_sysport_priv *priv = netdev_priv(dev);
1911 struct phy_device *phydev;
1918 /* Flush TX and RX FIFOs at TOPCTRL level */
1919 topctrl_flush(priv);
1921 /* Disable the UniMAC RX/TX */
1922 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1924 /* Enable RBUF 2bytes alignment and Receive Status Block */
1927 /* Set maximum frame length */
1929 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1931 gib_set_pad_extension(priv);
1933 /* Apply features again in case we changed them while interface was
1936 bcm_sysport_set_features(dev, dev->features);
1938 /* Set MAC address */
1939 umac_set_hw_addr(priv, dev->dev_addr);
1941 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1942 0, priv->phy_interface);
1944 netdev_err(dev, "could not attach to PHY\n");
1948 /* Reset house keeping link status */
1949 priv->old_duplex = -1;
1950 priv->old_link = -1;
1951 priv->old_pause = -1;
1953 /* mask all interrupts and request them */
1954 bcm_sysport_mask_all_intrs(priv);
1956 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1958 netdev_err(dev, "failed to request RX interrupt\n");
1959 goto out_phy_disconnect;
1962 if (!priv->is_lite) {
1963 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1966 netdev_err(dev, "failed to request TX interrupt\n");
1971 /* Initialize both hardware and software ring */
1972 for (i = 0; i < dev->num_tx_queues; i++) {
1973 ret = bcm_sysport_init_tx_ring(priv, i);
1975 netdev_err(dev, "failed to initialize TX ring %d\n",
1977 goto out_free_tx_ring;
1981 /* Initialize linked-list */
1982 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1984 /* Initialize RX ring */
1985 ret = bcm_sysport_init_rx_ring(priv);
1987 netdev_err(dev, "failed to initialize RX ring\n");
1988 goto out_free_rx_ring;
1992 ret = rdma_enable_set(priv, 1);
1994 goto out_free_rx_ring;
1997 ret = tdma_enable_set(priv, 1);
1999 goto out_clear_rx_int;
2001 /* Turn on UniMAC TX/RX */
2002 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2004 bcm_sysport_netif_start(dev);
2006 netif_tx_start_all_queues(dev);
2011 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2013 bcm_sysport_fini_rx_ring(priv);
2015 for (i = 0; i < dev->num_tx_queues; i++)
2016 bcm_sysport_fini_tx_ring(priv, i);
2018 free_irq(priv->irq1, dev);
2020 free_irq(priv->irq0, dev);
2022 phy_disconnect(phydev);
2026 static void bcm_sysport_netif_stop(struct net_device *dev)
2028 struct bcm_sysport_priv *priv = netdev_priv(dev);
2030 /* stop all software from updating hardware */
2031 netif_tx_disable(dev);
2032 napi_disable(&priv->napi);
2033 cancel_work_sync(&priv->dim.dim.work);
2034 phy_stop(dev->phydev);
2036 /* mask all interrupts */
2037 bcm_sysport_mask_all_intrs(priv);
2040 static int bcm_sysport_stop(struct net_device *dev)
2042 struct bcm_sysport_priv *priv = netdev_priv(dev);
2046 bcm_sysport_netif_stop(dev);
2048 /* Disable UniMAC RX */
2049 umac_enable_set(priv, CMD_RX_EN, 0);
2051 ret = tdma_enable_set(priv, 0);
2053 netdev_err(dev, "timeout disabling RDMA\n");
2057 /* Wait for a maximum packet size to be drained */
2058 usleep_range(2000, 3000);
2060 ret = rdma_enable_set(priv, 0);
2062 netdev_err(dev, "timeout disabling TDMA\n");
2066 /* Disable UniMAC TX */
2067 umac_enable_set(priv, CMD_TX_EN, 0);
2069 /* Free RX/TX rings SW structures */
2070 for (i = 0; i < dev->num_tx_queues; i++)
2071 bcm_sysport_fini_tx_ring(priv, i);
2072 bcm_sysport_fini_rx_ring(priv);
2074 free_irq(priv->irq0, dev);
2076 free_irq(priv->irq1, dev);
2078 /* Disconnect from PHY */
2079 phy_disconnect(dev->phydev);
2084 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2090 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2091 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2092 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2093 reg &= RXCHK_BRCM_TAG_CID_MASK;
2094 if (reg == location)
2101 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2102 struct ethtool_rxnfc *nfc)
2106 /* This is not a rule that we know about */
2107 index = bcm_sysport_rule_find(priv, nfc->fs.location);
2111 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2116 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2117 struct ethtool_rxnfc *nfc)
2122 /* We cannot match locations greater than what the classification ID
2123 * permits (256 entries)
2125 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2128 /* We cannot support flows that are not destined for a wake-up */
2129 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2132 /* All filters are already in use, we cannot match more rules */
2133 if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
2137 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2138 if (index >= RXCHK_BRCM_TAG_MAX)
2141 /* Location is the classification ID, and index is the position
2142 * within one of our 8 possible filters to be programmed
2144 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2145 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2146 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2147 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2148 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2150 priv->filters_loc[index] = nfc->fs.location;
2151 set_bit(index, priv->filters);
2156 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2161 /* This is not a rule that we know about */
2162 index = bcm_sysport_rule_find(priv, location);
2166 /* No need to disable this filter if it was enabled, this will
2167 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2169 clear_bit(index, priv->filters);
2170 priv->filters_loc[index] = 0;
2175 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2176 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2178 struct bcm_sysport_priv *priv = netdev_priv(dev);
2179 int ret = -EOPNOTSUPP;
2182 case ETHTOOL_GRXCLSRULE:
2183 ret = bcm_sysport_rule_get(priv, nfc);
2192 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2193 struct ethtool_rxnfc *nfc)
2195 struct bcm_sysport_priv *priv = netdev_priv(dev);
2196 int ret = -EOPNOTSUPP;
2199 case ETHTOOL_SRXCLSRLINS:
2200 ret = bcm_sysport_rule_set(priv, nfc);
2202 case ETHTOOL_SRXCLSRLDEL:
2203 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2212 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2213 .get_drvinfo = bcm_sysport_get_drvinfo,
2214 .get_msglevel = bcm_sysport_get_msglvl,
2215 .set_msglevel = bcm_sysport_set_msglvl,
2216 .get_link = ethtool_op_get_link,
2217 .get_strings = bcm_sysport_get_strings,
2218 .get_ethtool_stats = bcm_sysport_get_stats,
2219 .get_sset_count = bcm_sysport_get_sset_count,
2220 .get_wol = bcm_sysport_get_wol,
2221 .set_wol = bcm_sysport_set_wol,
2222 .get_coalesce = bcm_sysport_get_coalesce,
2223 .set_coalesce = bcm_sysport_set_coalesce,
2224 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2225 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2226 .get_rxnfc = bcm_sysport_get_rxnfc,
2227 .set_rxnfc = bcm_sysport_set_rxnfc,
2230 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2231 struct net_device *sb_dev)
2233 struct bcm_sysport_priv *priv = netdev_priv(dev);
2234 u16 queue = skb_get_queue_mapping(skb);
2235 struct bcm_sysport_tx_ring *tx_ring;
2236 unsigned int q, port;
2238 if (!netdev_uses_dsa(dev))
2239 return netdev_pick_tx(dev, skb, NULL);
2241 /* DSA tagging layer will have configured the correct queue */
2242 q = BRCM_TAG_GET_QUEUE(queue);
2243 port = BRCM_TAG_GET_PORT(queue);
2244 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2246 if (unlikely(!tx_ring))
2247 return netdev_pick_tx(dev, skb, NULL);
2249 return tx_ring->index;
2252 static const struct net_device_ops bcm_sysport_netdev_ops = {
2253 .ndo_start_xmit = bcm_sysport_xmit,
2254 .ndo_tx_timeout = bcm_sysport_tx_timeout,
2255 .ndo_open = bcm_sysport_open,
2256 .ndo_stop = bcm_sysport_stop,
2257 .ndo_set_features = bcm_sysport_set_features,
2258 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
2259 .ndo_set_mac_address = bcm_sysport_change_mac,
2260 #ifdef CONFIG_NET_POLL_CONTROLLER
2261 .ndo_poll_controller = bcm_sysport_poll_controller,
2263 .ndo_get_stats64 = bcm_sysport_get_stats64,
2264 .ndo_select_queue = bcm_sysport_select_queue,
2267 static int bcm_sysport_map_queues(struct notifier_block *nb,
2268 struct dsa_notifier_register_info *info)
2270 struct bcm_sysport_tx_ring *ring;
2271 struct bcm_sysport_priv *priv;
2272 struct net_device *slave_dev;
2273 unsigned int num_tx_queues;
2274 unsigned int q, qp, port;
2275 struct net_device *dev;
2277 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2278 if (priv->netdev != info->master)
2283 /* We can't be setting up queue inspection for non directly attached
2286 if (info->switch_number)
2289 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2292 port = info->port_number;
2293 slave_dev = info->info.dev;
2295 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2296 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2297 * per-port (slave_dev) network devices queue, we achieve just that.
2298 * This need to happen now before any slave network device is used such
2299 * it accurately reflects the number of real TX queues.
2302 netif_set_real_num_tx_queues(slave_dev,
2303 slave_dev->num_tx_queues / 2);
2305 num_tx_queues = slave_dev->real_num_tx_queues;
2307 if (priv->per_port_num_tx_queues &&
2308 priv->per_port_num_tx_queues != num_tx_queues)
2309 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2311 priv->per_port_num_tx_queues = num_tx_queues;
2313 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2315 ring = &priv->tx_rings[q];
2320 /* Just remember the mapping actual programming done
2321 * during bcm_sysport_init_tx_ring
2323 ring->switch_queue = qp;
2324 ring->switch_port = port;
2325 ring->inspect = true;
2326 priv->ring_map[qp + port * num_tx_queues] = ring;
2333 static int bcm_sysport_unmap_queues(struct notifier_block *nb,
2334 struct dsa_notifier_register_info *info)
2336 struct bcm_sysport_tx_ring *ring;
2337 struct bcm_sysport_priv *priv;
2338 struct net_device *slave_dev;
2339 unsigned int num_tx_queues;
2340 struct net_device *dev;
2341 unsigned int q, qp, port;
2343 priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier);
2344 if (priv->netdev != info->master)
2349 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2352 port = info->port_number;
2353 slave_dev = info->info.dev;
2355 num_tx_queues = slave_dev->real_num_tx_queues;
2357 for (q = 0; q < dev->num_tx_queues; q++) {
2358 ring = &priv->tx_rings[q];
2360 if (ring->switch_port != port)
2366 ring->inspect = false;
2367 qp = ring->switch_queue;
2368 priv->ring_map[qp + port * num_tx_queues] = NULL;
2374 static int bcm_sysport_dsa_notifier(struct notifier_block *nb,
2375 unsigned long event, void *ptr)
2377 int ret = NOTIFY_DONE;
2380 case DSA_PORT_REGISTER:
2381 ret = bcm_sysport_map_queues(nb, ptr);
2383 case DSA_PORT_UNREGISTER:
2384 ret = bcm_sysport_unmap_queues(nb, ptr);
2388 return notifier_from_errno(ret);
2391 #define REV_FMT "v%2x.%02x"
2393 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2396 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2398 [SYSTEMPORT_LITE] = {
2400 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2404 static const struct of_device_id bcm_sysport_of_match[] = {
2405 { .compatible = "brcm,systemportlite-v1.00",
2406 .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2407 { .compatible = "brcm,systemport-v1.00",
2408 .data = &bcm_sysport_params[SYSTEMPORT] },
2409 { .compatible = "brcm,systemport",
2410 .data = &bcm_sysport_params[SYSTEMPORT] },
2413 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2415 static int bcm_sysport_probe(struct platform_device *pdev)
2417 const struct bcm_sysport_hw_params *params;
2418 const struct of_device_id *of_id = NULL;
2419 struct bcm_sysport_priv *priv;
2420 struct device_node *dn;
2421 struct net_device *dev;
2422 const void *macaddr;
2426 dn = pdev->dev.of_node;
2427 of_id = of_match_node(bcm_sysport_of_match, dn);
2428 if (!of_id || !of_id->data)
2431 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2433 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2435 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2439 /* Fairly quickly we need to know the type of adapter we have */
2440 params = of_id->data;
2442 /* Read the Transmit/Receive Queue properties */
2443 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2444 txq = TDMA_NUM_RINGS;
2445 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2448 /* Sanity check the number of transmit queues */
2449 if (!txq || txq > TDMA_NUM_RINGS)
2452 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2456 /* Initialize private members */
2457 priv = netdev_priv(dev);
2459 /* Allocate number of TX rings */
2460 priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2461 sizeof(struct bcm_sysport_tx_ring),
2463 if (!priv->tx_rings)
2466 priv->is_lite = params->is_lite;
2467 priv->num_rx_desc_words = params->num_rx_desc_words;
2469 priv->irq0 = platform_get_irq(pdev, 0);
2470 if (!priv->is_lite) {
2471 priv->irq1 = platform_get_irq(pdev, 1);
2472 priv->wol_irq = platform_get_irq(pdev, 2);
2474 priv->wol_irq = platform_get_irq(pdev, 1);
2476 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2477 dev_err(&pdev->dev, "invalid interrupts\n");
2479 goto err_free_netdev;
2482 priv->base = devm_platform_ioremap_resource(pdev, 0);
2483 if (IS_ERR(priv->base)) {
2484 ret = PTR_ERR(priv->base);
2485 goto err_free_netdev;
2491 ret = of_get_phy_mode(dn, &priv->phy_interface);
2492 /* Default to GMII interface mode */
2494 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2496 /* In the case of a fixed PHY, the DT node associated
2497 * to the PHY is the Ethernet MAC DT node.
2499 if (of_phy_is_fixed_link(dn)) {
2500 ret = of_phy_register_fixed_link(dn);
2502 dev_err(&pdev->dev, "failed to register fixed PHY\n");
2503 goto err_free_netdev;
2509 /* Initialize netdevice members */
2510 macaddr = of_get_mac_address(dn);
2511 if (IS_ERR(macaddr)) {
2512 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2513 eth_hw_addr_random(dev);
2515 ether_addr_copy(dev->dev_addr, macaddr);
2518 SET_NETDEV_DEV(dev, &pdev->dev);
2519 dev_set_drvdata(&pdev->dev, dev);
2520 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2521 dev->netdev_ops = &bcm_sysport_netdev_ops;
2522 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
2524 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2525 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2526 dev->hw_features |= dev->features;
2527 dev->vlan_features |= dev->features;
2529 /* Request the WOL interrupt and advertise suspend if available */
2530 priv->wol_irq_disabled = 1;
2531 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2532 bcm_sysport_wol_isr, 0, dev->name, priv);
2534 device_set_wakeup_capable(&pdev->dev, 1);
2536 /* Set the needed headroom once and for all */
2537 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2538 dev->needed_headroom += sizeof(struct bcm_tsb);
2540 /* libphy will adjust the link state accordingly */
2541 netif_carrier_off(dev);
2543 priv->rx_max_coalesced_frames = 1;
2544 u64_stats_init(&priv->syncp);
2546 priv->dsa_notifier.notifier_call = bcm_sysport_dsa_notifier;
2548 ret = register_dsa_notifier(&priv->dsa_notifier);
2550 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2551 goto err_deregister_fixed_link;
2554 ret = register_netdev(dev);
2556 dev_err(&pdev->dev, "failed to register net_device\n");
2557 goto err_deregister_notifier;
2560 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2561 dev_info(&pdev->dev,
2562 "Broadcom SYSTEMPORT%s " REV_FMT
2563 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2564 priv->is_lite ? " Lite" : "",
2565 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2566 priv->irq0, priv->irq1, txq, rxq);
2570 err_deregister_notifier:
2571 unregister_dsa_notifier(&priv->dsa_notifier);
2572 err_deregister_fixed_link:
2573 if (of_phy_is_fixed_link(dn))
2574 of_phy_deregister_fixed_link(dn);
2580 static int bcm_sysport_remove(struct platform_device *pdev)
2582 struct net_device *dev = dev_get_drvdata(&pdev->dev);
2583 struct bcm_sysport_priv *priv = netdev_priv(dev);
2584 struct device_node *dn = pdev->dev.of_node;
2586 /* Not much to do, ndo_close has been called
2587 * and we use managed allocations
2589 unregister_dsa_notifier(&priv->dsa_notifier);
2590 unregister_netdev(dev);
2591 if (of_phy_is_fixed_link(dn))
2592 of_phy_deregister_fixed_link(dn);
2594 dev_set_drvdata(&pdev->dev, NULL);
2599 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2601 struct net_device *ndev = priv->netdev;
2602 unsigned int timeout = 1000;
2603 unsigned int index, i = 0;
2606 reg = umac_readl(priv, UMAC_MPD_CTRL);
2607 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2610 if (priv->wolopts & WAKE_MAGICSECURE) {
2611 /* Program the SecureOn password */
2612 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2614 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2618 umac_writel(priv, reg, UMAC_MPD_CTRL);
2620 if (priv->wolopts & WAKE_FILTER) {
2621 /* Turn on ACPI matching to steal packets from RBUF */
2622 reg = rbuf_readl(priv, RBUF_CONTROL);
2624 reg |= RBUF_ACPI_EN_LITE;
2626 reg |= RBUF_ACPI_EN;
2627 rbuf_writel(priv, reg, RBUF_CONTROL);
2629 /* Enable RXCHK, active filters and Broadcom tag matching */
2630 reg = rxchk_readl(priv, RXCHK_CONTROL);
2631 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2632 RXCHK_BRCM_TAG_MATCH_SHIFT);
2633 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2634 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2637 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2638 rxchk_writel(priv, reg, RXCHK_CONTROL);
2641 /* Make sure RBUF entered WoL mode as result */
2643 reg = rbuf_readl(priv, RBUF_STATUS);
2644 if (reg & RBUF_WOL_MODE)
2648 } while (timeout-- > 0);
2650 /* Do not leave the UniMAC RBUF matching only MPD packets */
2652 mpd_enable_set(priv, false);
2653 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2657 /* UniMAC receive needs to be turned on */
2658 umac_enable_set(priv, CMD_RX_EN, 1);
2660 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2665 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2667 struct net_device *dev = dev_get_drvdata(d);
2668 struct bcm_sysport_priv *priv = netdev_priv(dev);
2673 if (!netif_running(dev))
2676 netif_device_detach(dev);
2678 bcm_sysport_netif_stop(dev);
2680 phy_suspend(dev->phydev);
2682 /* Disable UniMAC RX */
2683 umac_enable_set(priv, CMD_RX_EN, 0);
2685 ret = rdma_enable_set(priv, 0);
2687 netdev_err(dev, "RDMA timeout!\n");
2691 /* Disable RXCHK if enabled */
2692 if (priv->rx_chk_en) {
2693 reg = rxchk_readl(priv, RXCHK_CONTROL);
2695 rxchk_writel(priv, reg, RXCHK_CONTROL);
2700 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2702 ret = tdma_enable_set(priv, 0);
2704 netdev_err(dev, "TDMA timeout!\n");
2708 /* Wait for a packet boundary */
2709 usleep_range(2000, 3000);
2711 umac_enable_set(priv, CMD_TX_EN, 0);
2713 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2715 /* Free RX/TX rings SW structures */
2716 for (i = 0; i < dev->num_tx_queues; i++)
2717 bcm_sysport_fini_tx_ring(priv, i);
2718 bcm_sysport_fini_rx_ring(priv);
2720 /* Get prepared for Wake-on-LAN */
2721 if (device_may_wakeup(d) && priv->wolopts)
2722 ret = bcm_sysport_suspend_to_wol(priv);
2727 static int __maybe_unused bcm_sysport_resume(struct device *d)
2729 struct net_device *dev = dev_get_drvdata(d);
2730 struct bcm_sysport_priv *priv = netdev_priv(dev);
2734 if (!netif_running(dev))
2739 /* Disable the UniMAC RX/TX */
2740 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2742 /* We may have been suspended and never received a WOL event that
2743 * would turn off MPD detection, take care of that now
2745 bcm_sysport_resume_from_wol(priv);
2747 /* Initialize both hardware and software ring */
2748 for (i = 0; i < dev->num_tx_queues; i++) {
2749 ret = bcm_sysport_init_tx_ring(priv, i);
2751 netdev_err(dev, "failed to initialize TX ring %d\n",
2753 goto out_free_tx_rings;
2757 /* Initialize linked-list */
2758 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2760 /* Initialize RX ring */
2761 ret = bcm_sysport_init_rx_ring(priv);
2763 netdev_err(dev, "failed to initialize RX ring\n");
2764 goto out_free_rx_ring;
2767 /* RX pipe enable */
2768 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2770 ret = rdma_enable_set(priv, 1);
2772 netdev_err(dev, "failed to enable RDMA\n");
2773 goto out_free_rx_ring;
2776 /* Restore enabled features */
2777 bcm_sysport_set_features(dev, dev->features);
2781 /* Set maximum frame length */
2783 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2785 gib_set_pad_extension(priv);
2787 /* Set MAC address */
2788 umac_set_hw_addr(priv, dev->dev_addr);
2790 umac_enable_set(priv, CMD_RX_EN, 1);
2792 /* TX pipe enable */
2793 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2795 umac_enable_set(priv, CMD_TX_EN, 1);
2797 ret = tdma_enable_set(priv, 1);
2799 netdev_err(dev, "TDMA timeout!\n");
2800 goto out_free_rx_ring;
2803 phy_resume(dev->phydev);
2805 bcm_sysport_netif_start(dev);
2807 netif_device_attach(dev);
2812 bcm_sysport_fini_rx_ring(priv);
2814 for (i = 0; i < dev->num_tx_queues; i++)
2815 bcm_sysport_fini_tx_ring(priv, i);
2819 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2820 bcm_sysport_suspend, bcm_sysport_resume);
2822 static struct platform_driver bcm_sysport_driver = {
2823 .probe = bcm_sysport_probe,
2824 .remove = bcm_sysport_remove,
2826 .name = "brcm-systemport",
2827 .of_match_table = bcm_sysport_of_match,
2828 .pm = &bcm_sysport_pm_ops,
2831 module_platform_driver(bcm_sysport_driver);
2833 MODULE_AUTHOR("Broadcom Corporation");
2834 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2835 MODULE_ALIAS("platform:brcm-systemport");
2836 MODULE_LICENSE("GPL");