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/dsa/brcm.h>
16 #include <linux/etherdevice.h>
17 #include <linux/platform_device.h>
19 #include <linux/of_net.h>
20 #include <linux/of_mdio.h>
21 #include <linux/phy.h>
22 #include <linux/phy_fixed.h>
24 #include <linux/clk.h>
28 #include "bcmsysport.h"
30 /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact
31 * same layout, except it has been moved by 4 bytes up, *sigh*
33 static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off)
35 if (priv->is_lite && off >= RDMA_STATUS)
37 return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off);
40 static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off)
42 if (priv->is_lite && off >= RDMA_STATUS)
44 writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off);
47 static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit)
59 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
60 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
62 #define BCM_SYSPORT_INTR_L2(which) \
63 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
66 priv->irq##which##_mask &= ~(mask); \
67 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
69 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
72 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
73 priv->irq##which##_mask |= (mask); \
76 BCM_SYSPORT_INTR_L2(0)
77 BCM_SYSPORT_INTR_L2(1)
79 /* Register accesses to GISB/RBUS registers are expensive (few hundred
80 * nanoseconds), so keep the check for 64-bits explicit here to save
81 * one register write per-packet on 32-bits platforms.
83 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
87 #ifdef CONFIG_PHYS_ADDR_T_64BIT
88 writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
89 d + DESC_ADDR_HI_STATUS_LEN);
91 writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO);
94 /* Ethtool operations */
95 static void bcm_sysport_set_rx_csum(struct net_device *dev,
96 netdev_features_t wanted)
98 struct bcm_sysport_priv *priv = netdev_priv(dev);
101 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
102 reg = rxchk_readl(priv, RXCHK_CONTROL);
103 /* Clear L2 header checks, which would prevent BPDUs
104 * from being received.
106 reg &= ~RXCHK_L2_HDR_DIS;
112 /* If UniMAC forwards CRC, we need to skip over it to get
113 * a valid CHK bit to be set in the per-packet status word
115 if (priv->rx_chk_en && priv->crc_fwd)
116 reg |= RXCHK_SKIP_FCS;
118 reg &= ~RXCHK_SKIP_FCS;
120 /* If Broadcom tags are enabled (e.g: using a switch), make
121 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
122 * tag after the Ethernet MAC Source Address.
124 if (netdev_uses_dsa(dev))
125 reg |= RXCHK_BRCM_TAG_EN;
127 reg &= ~RXCHK_BRCM_TAG_EN;
129 rxchk_writel(priv, reg, RXCHK_CONTROL);
132 static void bcm_sysport_set_tx_csum(struct net_device *dev,
133 netdev_features_t wanted)
135 struct bcm_sysport_priv *priv = netdev_priv(dev);
138 /* Hardware transmit checksum requires us to enable the Transmit status
139 * block prepended to the packet contents
141 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
142 NETIF_F_HW_VLAN_CTAG_TX));
143 reg = tdma_readl(priv, TDMA_CONTROL);
145 reg |= tdma_control_bit(priv, TSB_EN);
147 reg &= ~tdma_control_bit(priv, TSB_EN);
148 /* Indicating that software inserts Broadcom tags is needed for the TX
149 * checksum to be computed correctly when using VLAN HW acceleration,
150 * else it has no effect, so it can always be turned on.
152 if (netdev_uses_dsa(dev))
153 reg |= tdma_control_bit(priv, SW_BRCM_TAG);
155 reg &= ~tdma_control_bit(priv, SW_BRCM_TAG);
156 tdma_writel(priv, reg, TDMA_CONTROL);
158 /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */
159 if (wanted & NETIF_F_HW_VLAN_CTAG_TX)
160 tdma_writel(priv, ETH_P_8021Q, TDMA_TPID);
163 static int bcm_sysport_set_features(struct net_device *dev,
164 netdev_features_t features)
166 struct bcm_sysport_priv *priv = netdev_priv(dev);
169 ret = clk_prepare_enable(priv->clk);
173 /* Read CRC forward */
175 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
177 priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) &
178 GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT);
180 bcm_sysport_set_rx_csum(dev, features);
181 bcm_sysport_set_tx_csum(dev, features);
183 clk_disable_unprepare(priv->clk);
188 /* Hardware counters must be kept in sync because the order/offset
189 * is important here (order in structure declaration = order in hardware)
191 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
193 STAT_NETDEV64(rx_packets),
194 STAT_NETDEV64(tx_packets),
195 STAT_NETDEV64(rx_bytes),
196 STAT_NETDEV64(tx_bytes),
197 STAT_NETDEV(rx_errors),
198 STAT_NETDEV(tx_errors),
199 STAT_NETDEV(rx_dropped),
200 STAT_NETDEV(tx_dropped),
201 STAT_NETDEV(multicast),
202 /* UniMAC RSV counters */
203 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
204 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
205 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
206 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
207 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
208 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
209 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
210 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
211 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
212 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
213 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
214 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
215 STAT_MIB_RX("rx_multicast", mib.rx.mca),
216 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
217 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
218 STAT_MIB_RX("rx_control", mib.rx.cf),
219 STAT_MIB_RX("rx_pause", mib.rx.pf),
220 STAT_MIB_RX("rx_unknown", mib.rx.uo),
221 STAT_MIB_RX("rx_align", mib.rx.aln),
222 STAT_MIB_RX("rx_outrange", mib.rx.flr),
223 STAT_MIB_RX("rx_code", mib.rx.cde),
224 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
225 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
226 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
227 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
228 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
229 STAT_MIB_RX("rx_unicast", mib.rx.uc),
230 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
231 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
232 /* UniMAC TSV counters */
233 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
234 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
235 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
236 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
237 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
238 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
239 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
240 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
241 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
242 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
243 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
244 STAT_MIB_TX("tx_multicast", mib.tx.mca),
245 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
246 STAT_MIB_TX("tx_pause", mib.tx.pf),
247 STAT_MIB_TX("tx_control", mib.tx.cf),
248 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
249 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
250 STAT_MIB_TX("tx_defer", mib.tx.drf),
251 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
252 STAT_MIB_TX("tx_single_col", mib.tx.scl),
253 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
254 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
255 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
256 STAT_MIB_TX("tx_frags", mib.tx.frg),
257 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
258 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
259 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
260 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
261 STAT_MIB_TX("tx_unicast", mib.tx.uc),
262 /* UniMAC RUNT counters */
263 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
264 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
265 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
266 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
267 /* RXCHK misc statistics */
268 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
269 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
270 RXCHK_OTHER_DISC_CNTR),
271 /* RBUF misc statistics */
272 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
273 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
274 /* RDMA misc statistics */
275 STAT_RDMA("rdma_ovflow_cnt", mib.rdma_ovflow_cnt, RDMA_OVFL_DISC_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 strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
290 strscpy(info->bus_info, "platform", sizeof(info->bus_info));
293 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
295 struct bcm_sysport_priv *priv = netdev_priv(dev);
297 return priv->msg_enable;
300 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
302 struct bcm_sysport_priv *priv = netdev_priv(dev);
304 priv->msg_enable = enable;
307 static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type)
310 case BCM_SYSPORT_STAT_NETDEV:
311 case BCM_SYSPORT_STAT_NETDEV64:
312 case BCM_SYSPORT_STAT_RXCHK:
313 case BCM_SYSPORT_STAT_RBUF:
314 case BCM_SYSPORT_STAT_RDMA:
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;
353 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
354 s = &bcm_sysport_gstrings_stats[i];
356 !bcm_sysport_lite_stat_valid(s->type))
359 ethtool_puts(&data, s->stat_string);
362 for (i = 0; i < dev->num_tx_queues; i++) {
363 ethtool_sprintf(&data, "txq%d_packets", i);
364 ethtool_sprintf(&data, "txq%d_bytes", i);
372 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
376 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
377 const struct bcm_sysport_stats *s;
382 s = &bcm_sysport_gstrings_stats[i];
384 case BCM_SYSPORT_STAT_NETDEV:
385 case BCM_SYSPORT_STAT_NETDEV64:
386 case BCM_SYSPORT_STAT_SOFT:
388 case BCM_SYSPORT_STAT_MIB_RX:
389 case BCM_SYSPORT_STAT_MIB_TX:
390 case BCM_SYSPORT_STAT_RUNT:
394 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
395 offset = UMAC_MIB_STAT_OFFSET;
396 val = umac_readl(priv, UMAC_MIB_START + j + offset);
398 case BCM_SYSPORT_STAT_RXCHK:
399 val = rxchk_readl(priv, s->reg_offset);
401 rxchk_writel(priv, 0, s->reg_offset);
403 case BCM_SYSPORT_STAT_RBUF:
404 val = rbuf_readl(priv, s->reg_offset);
406 rbuf_writel(priv, 0, s->reg_offset);
408 case BCM_SYSPORT_STAT_RDMA:
412 val = rdma_readl(priv, s->reg_offset);
414 rdma_writel(priv, 0, s->reg_offset);
419 p = (char *)priv + s->stat_offset;
423 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
426 static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv,
427 u64 *tx_bytes, u64 *tx_packets)
429 struct bcm_sysport_tx_ring *ring;
430 u64 bytes = 0, packets = 0;
434 for (q = 0; q < priv->netdev->num_tx_queues; q++) {
435 ring = &priv->tx_rings[q];
437 start = u64_stats_fetch_begin(&priv->syncp);
439 packets = ring->packets;
440 } while (u64_stats_fetch_retry(&priv->syncp, start));
443 *tx_packets += packets;
447 static void bcm_sysport_get_stats(struct net_device *dev,
448 struct ethtool_stats *stats, u64 *data)
450 struct bcm_sysport_priv *priv = netdev_priv(dev);
451 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
452 struct u64_stats_sync *syncp = &priv->syncp;
453 struct bcm_sysport_tx_ring *ring;
454 u64 tx_bytes = 0, tx_packets = 0;
458 if (netif_running(dev)) {
459 bcm_sysport_update_mib_counters(priv);
460 bcm_sysport_update_tx_stats(priv, &tx_bytes, &tx_packets);
461 stats64->tx_bytes = tx_bytes;
462 stats64->tx_packets = tx_packets;
465 for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
466 const struct bcm_sysport_stats *s;
469 s = &bcm_sysport_gstrings_stats[i];
470 if (s->type == BCM_SYSPORT_STAT_NETDEV)
471 p = (char *)&dev->stats;
472 else if (s->type == BCM_SYSPORT_STAT_NETDEV64)
477 if (priv->is_lite && !bcm_sysport_lite_stat_valid(s->type))
481 if (s->stat_sizeof == sizeof(u64) &&
482 s->type == BCM_SYSPORT_STAT_NETDEV64) {
484 start = u64_stats_fetch_begin(syncp);
486 } while (u64_stats_fetch_retry(syncp, start));
492 /* For SYSTEMPORT Lite since we have holes in our statistics, j would
493 * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it
494 * needs to point to how many total statistics we have minus the
495 * number of per TX queue statistics
497 j = bcm_sysport_get_sset_count(dev, ETH_SS_STATS) -
498 dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT;
500 for (i = 0; i < dev->num_tx_queues; i++) {
501 ring = &priv->tx_rings[i];
502 data[j] = ring->packets;
504 data[j] = ring->bytes;
509 static void bcm_sysport_get_wol(struct net_device *dev,
510 struct ethtool_wolinfo *wol)
512 struct bcm_sysport_priv *priv = netdev_priv(dev);
514 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
515 wol->wolopts = priv->wolopts;
517 if (!(priv->wolopts & WAKE_MAGICSECURE))
520 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
523 static int bcm_sysport_set_wol(struct net_device *dev,
524 struct ethtool_wolinfo *wol)
526 struct bcm_sysport_priv *priv = netdev_priv(dev);
527 struct device *kdev = &priv->pdev->dev;
528 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
530 if (!device_can_wakeup(kdev))
533 if (wol->wolopts & ~supported)
536 if (wol->wolopts & WAKE_MAGICSECURE)
537 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
539 /* Flag the device and relevant IRQ as wakeup capable */
541 device_set_wakeup_enable(kdev, 1);
542 if (priv->wol_irq_disabled)
543 enable_irq_wake(priv->wol_irq);
544 priv->wol_irq_disabled = 0;
546 device_set_wakeup_enable(kdev, 0);
547 /* Avoid unbalanced disable_irq_wake calls */
548 if (!priv->wol_irq_disabled)
549 disable_irq_wake(priv->wol_irq);
550 priv->wol_irq_disabled = 1;
553 priv->wolopts = wol->wolopts;
558 static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv,
563 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
564 reg &= ~(RDMA_INTR_THRESH_MASK |
565 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
567 reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT;
568 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
571 static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring,
572 struct ethtool_coalesce *ec)
574 struct bcm_sysport_priv *priv = ring->priv;
577 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index));
578 reg &= ~(RING_INTR_THRESH_MASK |
579 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
580 reg |= ec->tx_max_coalesced_frames;
581 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
583 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(ring->index));
586 static int bcm_sysport_get_coalesce(struct net_device *dev,
587 struct ethtool_coalesce *ec,
588 struct kernel_ethtool_coalesce *kernel_coal,
589 struct netlink_ext_ack *extack)
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,
610 struct kernel_ethtool_coalesce *kernel_coal,
611 struct netlink_ext_ack *extack)
613 struct bcm_sysport_priv *priv = netdev_priv(dev);
614 struct dim_cq_moder moder;
618 /* Base system clock is 125Mhz, DMA timeout is this reference clock
619 * divided by 1024, which yield roughly 8.192 us, our maximum value has
620 * to fit in the RING_TIMEOUT_MASK (16 bits).
622 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
623 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
624 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
625 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
628 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
629 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
632 for (i = 0; i < dev->num_tx_queues; i++)
633 bcm_sysport_set_tx_coalesce(&priv->tx_rings[i], ec);
635 priv->rx_coalesce_usecs = ec->rx_coalesce_usecs;
636 priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames;
637 usecs = priv->rx_coalesce_usecs;
638 pkts = priv->rx_max_coalesced_frames;
640 if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) {
641 moder = net_dim_get_def_rx_moderation(priv->dim.dim.mode);
646 priv->dim.use_dim = ec->use_adaptive_rx_coalesce;
648 /* Apply desired coalescing parameters */
649 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
654 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
656 dev_consume_skb_any(cb->skb);
658 dma_unmap_addr_set(cb, dma_addr, 0);
661 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
662 struct bcm_sysport_cb *cb)
664 struct device *kdev = &priv->pdev->dev;
665 struct net_device *ndev = priv->netdev;
666 struct sk_buff *skb, *rx_skb;
669 /* Allocate a new SKB for a new packet */
670 skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
671 GFP_ATOMIC | __GFP_NOWARN);
673 priv->mib.alloc_rx_buff_failed++;
674 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
678 mapping = dma_map_single(kdev, skb->data,
679 RX_BUF_LENGTH, DMA_FROM_DEVICE);
680 if (dma_mapping_error(kdev, mapping)) {
681 priv->mib.rx_dma_failed++;
682 dev_kfree_skb_any(skb);
683 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
687 /* Grab the current SKB on the ring */
690 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
691 RX_BUF_LENGTH, DMA_FROM_DEVICE);
693 /* Put the new SKB on the ring */
695 dma_unmap_addr_set(cb, dma_addr, mapping);
696 dma_desc_set_addr(priv, cb->bd_addr, mapping);
698 netif_dbg(priv, rx_status, ndev, "RX refill\n");
700 /* Return the current SKB to the caller */
704 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
706 struct bcm_sysport_cb *cb;
710 for (i = 0; i < priv->num_rx_bds; i++) {
711 cb = &priv->rx_cbs[i];
712 skb = bcm_sysport_rx_refill(priv, cb);
721 /* Poll the hardware for up to budget packets to process */
722 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
725 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
726 struct net_device *ndev = priv->netdev;
727 unsigned int processed = 0, to_process;
728 unsigned int processed_bytes = 0;
729 struct bcm_sysport_cb *cb;
731 unsigned int p_index;
735 /* Clear status before servicing to reduce spurious interrupts */
736 intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR);
738 /* Determine how much we should process since last call, SYSTEMPORT Lite
739 * groups the producer and consumer indexes into the same 32-bit
740 * which we access using RDMA_CONS_INDEX
743 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
745 p_index = rdma_readl(priv, RDMA_CONS_INDEX);
746 p_index &= RDMA_PROD_INDEX_MASK;
748 to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;
750 netif_dbg(priv, rx_status, ndev,
751 "p_index=%d rx_c_index=%d to_process=%d\n",
752 p_index, priv->rx_c_index, to_process);
754 while ((processed < to_process) && (processed < budget)) {
755 cb = &priv->rx_cbs[priv->rx_read_ptr];
756 skb = bcm_sysport_rx_refill(priv, cb);
759 /* We do not have a backing SKB, so we do not a corresponding
760 * DMA mapping for this incoming packet since
761 * bcm_sysport_rx_refill always either has both skb and mapping
764 if (unlikely(!skb)) {
765 netif_err(priv, rx_err, ndev, "out of memory!\n");
766 ndev->stats.rx_dropped++;
767 ndev->stats.rx_errors++;
771 /* Extract the Receive Status Block prepended */
772 rsb = (struct bcm_rsb *)skb->data;
773 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
774 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
777 netif_dbg(priv, rx_status, ndev,
778 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
779 p_index, priv->rx_c_index, priv->rx_read_ptr,
782 if (unlikely(len > RX_BUF_LENGTH)) {
783 netif_err(priv, rx_status, ndev, "oversized packet\n");
784 ndev->stats.rx_length_errors++;
785 ndev->stats.rx_errors++;
786 dev_kfree_skb_any(skb);
790 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
791 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
792 ndev->stats.rx_dropped++;
793 ndev->stats.rx_errors++;
794 dev_kfree_skb_any(skb);
798 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
799 netif_err(priv, rx_err, ndev, "error packet\n");
800 if (status & RX_STATUS_OVFLOW)
801 ndev->stats.rx_over_errors++;
802 ndev->stats.rx_dropped++;
803 ndev->stats.rx_errors++;
804 dev_kfree_skb_any(skb);
810 /* Hardware validated our checksum */
811 if (likely(status & DESC_L4_CSUM))
812 skb->ip_summed = CHECKSUM_UNNECESSARY;
814 /* Hardware pre-pends packets with 2bytes before Ethernet
815 * header plus we have the Receive Status Block, strip off all
816 * of this from the SKB.
818 skb_pull(skb, sizeof(*rsb) + 2);
819 len -= (sizeof(*rsb) + 2);
820 processed_bytes += len;
822 /* UniMAC may forward CRC */
824 skb_trim(skb, len - ETH_FCS_LEN);
828 skb->protocol = eth_type_trans(skb, ndev);
829 ndev->stats.rx_packets++;
830 ndev->stats.rx_bytes += len;
831 u64_stats_update_begin(&priv->syncp);
832 stats64->rx_packets++;
833 stats64->rx_bytes += len;
834 u64_stats_update_end(&priv->syncp);
836 napi_gro_receive(&priv->napi, skb);
841 if (priv->rx_read_ptr == priv->num_rx_bds)
842 priv->rx_read_ptr = 0;
845 priv->dim.packets = processed;
846 priv->dim.bytes = processed_bytes;
851 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring,
852 struct bcm_sysport_cb *cb,
853 unsigned int *bytes_compl,
854 unsigned int *pkts_compl)
856 struct bcm_sysport_priv *priv = ring->priv;
857 struct device *kdev = &priv->pdev->dev;
860 *bytes_compl += cb->skb->len;
861 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
862 dma_unmap_len(cb, dma_len),
865 bcm_sysport_free_cb(cb);
867 } else if (dma_unmap_addr(cb, dma_addr)) {
868 *bytes_compl += dma_unmap_len(cb, dma_len);
869 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
870 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
871 dma_unmap_addr_set(cb, dma_addr, 0);
875 /* Reclaim queued SKBs for transmission completion, lockless version */
876 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
877 struct bcm_sysport_tx_ring *ring)
879 unsigned int pkts_compl = 0, bytes_compl = 0;
880 struct net_device *ndev = priv->netdev;
881 unsigned int txbds_processed = 0;
882 struct bcm_sysport_cb *cb;
883 unsigned int txbds_ready;
884 unsigned int c_index;
887 /* Clear status before servicing to reduce spurious interrupts */
888 if (!ring->priv->is_lite)
889 intrl2_1_writel(ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR);
891 intrl2_0_writel(ring->priv, BIT(ring->index +
892 INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR);
894 /* Compute how many descriptors have been processed since last call */
895 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
896 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
897 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
899 netif_dbg(priv, tx_done, ndev,
900 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
901 ring->index, ring->c_index, c_index, txbds_ready);
903 while (txbds_processed < txbds_ready) {
904 cb = &ring->cbs[ring->clean_index];
905 bcm_sysport_tx_reclaim_one(ring, cb, &bytes_compl, &pkts_compl);
910 if (likely(ring->clean_index < ring->size - 1))
913 ring->clean_index = 0;
916 u64_stats_update_begin(&priv->syncp);
917 ring->packets += pkts_compl;
918 ring->bytes += bytes_compl;
919 u64_stats_update_end(&priv->syncp);
921 ring->c_index = c_index;
923 netif_dbg(priv, tx_done, ndev,
924 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
925 ring->index, ring->c_index, pkts_compl, bytes_compl);
930 /* Locked version of the per-ring TX reclaim routine */
931 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
932 struct bcm_sysport_tx_ring *ring)
934 struct netdev_queue *txq;
935 unsigned int released;
938 txq = netdev_get_tx_queue(priv->netdev, ring->index);
940 spin_lock_irqsave(&ring->lock, flags);
941 released = __bcm_sysport_tx_reclaim(priv, ring);
943 netif_tx_wake_queue(txq);
945 spin_unlock_irqrestore(&ring->lock, flags);
950 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
951 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
952 struct bcm_sysport_tx_ring *ring)
956 spin_lock_irqsave(&ring->lock, flags);
957 __bcm_sysport_tx_reclaim(priv, ring);
958 spin_unlock_irqrestore(&ring->lock, flags);
961 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
963 struct bcm_sysport_tx_ring *ring =
964 container_of(napi, struct bcm_sysport_tx_ring, napi);
965 unsigned int work_done = 0;
967 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
969 if (work_done == 0) {
971 /* re-enable TX interrupt */
972 if (!ring->priv->is_lite)
973 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
975 intrl2_0_mask_clear(ring->priv, BIT(ring->index +
976 INTRL2_0_TDMA_MBDONE_SHIFT));
984 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
988 for (q = 0; q < priv->netdev->num_tx_queues; q++)
989 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
992 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
994 struct bcm_sysport_priv *priv =
995 container_of(napi, struct bcm_sysport_priv, napi);
996 struct dim_sample dim_sample = {};
997 unsigned int work_done = 0;
999 work_done = bcm_sysport_desc_rx(priv, budget);
1001 priv->rx_c_index += work_done;
1002 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
1004 /* SYSTEMPORT Lite groups the producer/consumer index, producer is
1005 * maintained by HW, but writes to it will be ignore while RDMA
1009 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
1011 rdma_writel(priv, priv->rx_c_index << 16, RDMA_CONS_INDEX);
1013 if (work_done < budget) {
1014 napi_complete_done(napi, work_done);
1015 /* re-enable RX interrupts */
1016 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
1019 if (priv->dim.use_dim) {
1020 dim_update_sample(priv->dim.event_ctr, priv->dim.packets,
1021 priv->dim.bytes, &dim_sample);
1022 net_dim(&priv->dim.dim, &dim_sample);
1028 static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable)
1032 reg = umac_readl(priv, UMAC_MPD_CTRL);
1037 umac_writel(priv, reg, UMAC_MPD_CTRL);
1040 bit = RBUF_ACPI_EN_LITE;
1044 reg = rbuf_readl(priv, RBUF_CONTROL);
1049 rbuf_writel(priv, reg, RBUF_CONTROL);
1052 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
1057 /* Disable RXCHK, active filters and Broadcom tag matching */
1058 reg = rxchk_readl(priv, RXCHK_CONTROL);
1059 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
1060 RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN);
1061 rxchk_writel(priv, reg, RXCHK_CONTROL);
1063 /* Make sure we restore correct CID index in case HW lost
1064 * its context during deep idle state
1066 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
1067 rxchk_writel(priv, priv->filters_loc[index] <<
1068 RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index));
1069 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
1072 /* Clear the MagicPacket detection logic */
1073 mpd_enable_set(priv, false);
1075 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
1076 if (reg & INTRL2_0_MPD)
1077 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
1079 if (reg & INTRL2_0_BRCM_MATCH_TAG) {
1080 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
1081 RXCHK_BRCM_TAG_MATCH_MASK;
1082 netdev_info(priv->netdev,
1083 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
1086 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
1089 static void bcm_sysport_dim_work(struct work_struct *work)
1091 struct dim *dim = container_of(work, struct dim, work);
1092 struct bcm_sysport_net_dim *ndim =
1093 container_of(dim, struct bcm_sysport_net_dim, dim);
1094 struct bcm_sysport_priv *priv =
1095 container_of(ndim, struct bcm_sysport_priv, dim);
1096 struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(dim->mode,
1099 bcm_sysport_set_rx_coalesce(priv, cur_profile.usec, cur_profile.pkts);
1100 dim->state = DIM_START_MEASURE;
1103 /* RX and misc interrupt routine */
1104 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
1106 struct net_device *dev = dev_id;
1107 struct bcm_sysport_priv *priv = netdev_priv(dev);
1108 struct bcm_sysport_tx_ring *txr;
1109 unsigned int ring, ring_bit;
1111 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
1112 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
1113 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
1115 if (unlikely(priv->irq0_stat == 0)) {
1116 netdev_warn(priv->netdev, "spurious RX interrupt\n");
1120 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
1121 priv->dim.event_ctr++;
1122 if (likely(napi_schedule_prep(&priv->napi))) {
1123 /* disable RX interrupts */
1124 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
1125 __napi_schedule_irqoff(&priv->napi);
1129 /* TX ring is full, perform a full reclaim since we do not know
1130 * which one would trigger this interrupt
1132 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
1133 bcm_sysport_tx_reclaim_all(priv);
1138 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1139 ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT);
1140 if (!(priv->irq0_stat & ring_bit))
1143 txr = &priv->tx_rings[ring];
1145 if (likely(napi_schedule_prep(&txr->napi))) {
1146 intrl2_0_mask_set(priv, ring_bit);
1147 __napi_schedule(&txr->napi);
1154 /* TX interrupt service routine */
1155 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
1157 struct net_device *dev = dev_id;
1158 struct bcm_sysport_priv *priv = netdev_priv(dev);
1159 struct bcm_sysport_tx_ring *txr;
1162 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
1163 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
1164 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1166 if (unlikely(priv->irq1_stat == 0)) {
1167 netdev_warn(priv->netdev, "spurious TX interrupt\n");
1171 for (ring = 0; ring < dev->num_tx_queues; ring++) {
1172 if (!(priv->irq1_stat & BIT(ring)))
1175 txr = &priv->tx_rings[ring];
1177 if (likely(napi_schedule_prep(&txr->napi))) {
1178 intrl2_1_mask_set(priv, BIT(ring));
1179 __napi_schedule_irqoff(&txr->napi);
1186 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
1188 struct bcm_sysport_priv *priv = dev_id;
1190 pm_wakeup_event(&priv->pdev->dev, 0);
1195 #ifdef CONFIG_NET_POLL_CONTROLLER
1196 static void bcm_sysport_poll_controller(struct net_device *dev)
1198 struct bcm_sysport_priv *priv = netdev_priv(dev);
1200 disable_irq(priv->irq0);
1201 bcm_sysport_rx_isr(priv->irq0, priv);
1202 enable_irq(priv->irq0);
1204 if (!priv->is_lite) {
1205 disable_irq(priv->irq1);
1206 bcm_sysport_tx_isr(priv->irq1, priv);
1207 enable_irq(priv->irq1);
1212 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
1213 struct net_device *dev)
1215 struct bcm_sysport_priv *priv = netdev_priv(dev);
1216 struct sk_buff *nskb;
1217 struct bcm_tsb *tsb;
1223 /* Re-allocate SKB if needed */
1224 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
1225 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
1227 dev_kfree_skb_any(skb);
1228 priv->mib.tx_realloc_tsb_failed++;
1229 dev->stats.tx_errors++;
1230 dev->stats.tx_dropped++;
1233 dev_consume_skb_any(skb);
1235 priv->mib.tx_realloc_tsb++;
1238 tsb = skb_push(skb, sizeof(*tsb));
1239 /* Zero-out TSB by default */
1240 memset(tsb, 0, sizeof(*tsb));
1242 if (skb_vlan_tag_present(skb)) {
1243 tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK;
1244 tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT;
1247 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1248 ip_ver = skb->protocol;
1250 case htons(ETH_P_IP):
1251 ip_proto = ip_hdr(skb)->protocol;
1253 case htons(ETH_P_IPV6):
1254 ip_proto = ipv6_hdr(skb)->nexthdr;
1260 /* Get the checksum offset and the L4 (transport) offset */
1261 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
1262 /* Account for the HW inserted VLAN tag */
1263 if (skb_vlan_tag_present(skb))
1264 csum_start += VLAN_HLEN;
1265 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
1266 csum_info |= (csum_start << L4_PTR_SHIFT);
1268 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1269 csum_info |= L4_LENGTH_VALID;
1270 if (ip_proto == IPPROTO_UDP &&
1271 ip_ver == htons(ETH_P_IP))
1272 csum_info |= L4_UDP;
1277 tsb->l4_ptr_dest_map = csum_info;
1283 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1284 struct net_device *dev)
1286 struct bcm_sysport_priv *priv = netdev_priv(dev);
1287 struct device *kdev = &priv->pdev->dev;
1288 struct bcm_sysport_tx_ring *ring;
1289 unsigned long flags, desc_flags;
1290 struct bcm_sysport_cb *cb;
1291 struct netdev_queue *txq;
1292 u32 len_status, addr_lo;
1293 unsigned int skb_len;
1298 queue = skb_get_queue_mapping(skb);
1299 txq = netdev_get_tx_queue(dev, queue);
1300 ring = &priv->tx_rings[queue];
1302 /* lock against tx reclaim in BH context and TX ring full interrupt */
1303 spin_lock_irqsave(&ring->lock, flags);
1304 if (unlikely(ring->desc_count == 0)) {
1305 netif_tx_stop_queue(txq);
1306 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1307 ret = NETDEV_TX_BUSY;
1311 /* Insert TSB and checksum infos */
1313 skb = bcm_sysport_insert_tsb(skb, dev);
1322 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1323 if (dma_mapping_error(kdev, mapping)) {
1324 priv->mib.tx_dma_failed++;
1325 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1326 skb->data, skb_len);
1328 dev_kfree_skb_any(skb);
1332 /* Remember the SKB for future freeing */
1333 cb = &ring->cbs[ring->curr_desc];
1335 dma_unmap_addr_set(cb, dma_addr, mapping);
1336 dma_unmap_len_set(cb, dma_len, skb_len);
1338 addr_lo = lower_32_bits(mapping);
1339 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1340 len_status |= (skb_len << DESC_LEN_SHIFT);
1341 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1343 if (skb->ip_summed == CHECKSUM_PARTIAL)
1344 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1345 if (skb_vlan_tag_present(skb))
1346 len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT);
1349 if (ring->curr_desc == ring->size)
1350 ring->curr_desc = 0;
1353 /* Ports are latched, so write upper address first */
1354 spin_lock_irqsave(&priv->desc_lock, desc_flags);
1355 tdma_writel(priv, len_status, TDMA_WRITE_PORT_HI(ring->index));
1356 tdma_writel(priv, addr_lo, TDMA_WRITE_PORT_LO(ring->index));
1357 spin_unlock_irqrestore(&priv->desc_lock, desc_flags);
1359 /* Check ring space and update SW control flow */
1360 if (ring->desc_count == 0)
1361 netif_tx_stop_queue(txq);
1363 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1364 ring->index, ring->desc_count, ring->curr_desc);
1368 spin_unlock_irqrestore(&ring->lock, flags);
1372 static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue)
1374 netdev_warn(dev, "transmit timeout!\n");
1376 netif_trans_update(dev);
1377 dev->stats.tx_errors++;
1379 netif_tx_wake_all_queues(dev);
1382 /* phylib adjust link callback */
1383 static void bcm_sysport_adj_link(struct net_device *dev)
1385 struct bcm_sysport_priv *priv = netdev_priv(dev);
1386 struct phy_device *phydev = dev->phydev;
1387 unsigned int changed = 0;
1388 u32 cmd_bits = 0, reg;
1390 if (priv->old_link != phydev->link) {
1392 priv->old_link = phydev->link;
1395 if (priv->old_duplex != phydev->duplex) {
1397 priv->old_duplex = phydev->duplex;
1403 switch (phydev->speed) {
1405 cmd_bits = CMD_SPEED_2500;
1408 cmd_bits = CMD_SPEED_1000;
1411 cmd_bits = CMD_SPEED_100;
1414 cmd_bits = CMD_SPEED_10;
1419 cmd_bits <<= CMD_SPEED_SHIFT;
1421 if (phydev->duplex == DUPLEX_HALF)
1422 cmd_bits |= CMD_HD_EN;
1424 if (priv->old_pause != phydev->pause) {
1426 priv->old_pause = phydev->pause;
1430 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1436 reg = umac_readl(priv, UMAC_CMD);
1437 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1438 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1439 CMD_TX_PAUSE_IGNORE);
1441 umac_writel(priv, reg, UMAC_CMD);
1445 phy_print_status(phydev);
1448 static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv,
1449 void (*cb)(struct work_struct *work))
1451 struct bcm_sysport_net_dim *dim = &priv->dim;
1453 INIT_WORK(&dim->dim.work, cb);
1454 dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1460 static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv)
1462 struct bcm_sysport_net_dim *dim = &priv->dim;
1463 struct dim_cq_moder moder;
1466 usecs = priv->rx_coalesce_usecs;
1467 pkts = priv->rx_max_coalesced_frames;
1469 /* If DIM was enabled, re-apply default parameters */
1471 moder = net_dim_get_def_rx_moderation(dim->dim.mode);
1476 bcm_sysport_set_rx_coalesce(priv, usecs, pkts);
1479 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1482 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1486 /* Simple descriptors partitioning for now */
1489 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1491 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1495 /* Initialize SW view of the ring */
1496 spin_lock_init(&ring->lock);
1498 netif_napi_add_tx(priv->netdev, &ring->napi, bcm_sysport_tx_poll);
1499 ring->index = index;
1501 ring->clean_index = 0;
1502 ring->alloc_size = ring->size;
1503 ring->desc_count = ring->size;
1504 ring->curr_desc = 0;
1506 /* Initialize HW ring */
1507 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1508 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1509 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1510 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1512 /* Configure QID and port mapping */
1513 reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index));
1514 reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT);
1515 if (ring->inspect) {
1516 reg |= ring->switch_queue & RING_QID_MASK;
1517 reg |= ring->switch_port << RING_PORT_ID_SHIFT;
1519 reg |= RING_IGNORE_STATUS;
1521 tdma_writel(priv, reg, TDMA_DESC_RING_MAPPING(index));
1523 /* Adjust the packet size calculations if SYSTEMPORT is responsible
1524 * for HW insertion of VLAN tags
1526 if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)
1527 reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT;
1528 tdma_writel(priv, reg, TDMA_DESC_RING_PCP_DEI_VID(index));
1530 /* Enable ACB algorithm 2 */
1531 reg = tdma_readl(priv, TDMA_CONTROL);
1532 reg |= tdma_control_bit(priv, ACB_ALGO);
1533 tdma_writel(priv, reg, TDMA_CONTROL);
1535 /* Do not use tdma_control_bit() here because TSB_SWAP1 collides
1536 * with the original definition of ACB_ALGO
1538 reg = tdma_readl(priv, TDMA_CONTROL);
1540 reg &= ~BIT(TSB_SWAP1);
1541 /* Set a correct TSB format based on host endian */
1542 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1543 reg |= tdma_control_bit(priv, TSB_SWAP0);
1545 reg &= ~tdma_control_bit(priv, TSB_SWAP0);
1546 tdma_writel(priv, reg, TDMA_CONTROL);
1548 /* Program the number of descriptors as MAX_THRESHOLD and half of
1549 * its size for the hysteresis trigger
1551 tdma_writel(priv, ring->size |
1552 1 << RING_HYST_THRESH_SHIFT,
1553 TDMA_DESC_RING_MAX_HYST(index));
1555 /* Enable the ring queue in the arbiter */
1556 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1557 reg |= (1 << index);
1558 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1560 napi_enable(&ring->napi);
1562 netif_dbg(priv, hw, priv->netdev,
1563 "TDMA cfg, size=%d, switch q=%d,port=%d\n",
1564 ring->size, ring->switch_queue,
1570 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1573 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1576 /* Caller should stop the TDMA engine */
1577 reg = tdma_readl(priv, TDMA_STATUS);
1578 if (!(reg & TDMA_DISABLED))
1579 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1581 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1582 * fail, so by checking this pointer we know whether the TX ring was
1583 * fully initialized or not.
1588 napi_disable(&ring->napi);
1589 netif_napi_del(&ring->napi);
1591 bcm_sysport_tx_clean(priv, ring);
1596 ring->alloc_size = 0;
1598 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1602 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1603 unsigned int enable)
1605 unsigned int timeout = 1000;
1608 reg = rdma_readl(priv, RDMA_CONTROL);
1613 rdma_writel(priv, reg, RDMA_CONTROL);
1615 /* Poll for RMDA disabling completion */
1617 reg = rdma_readl(priv, RDMA_STATUS);
1618 if (!!(reg & RDMA_DISABLED) == !enable)
1620 usleep_range(1000, 2000);
1621 } while (timeout-- > 0);
1623 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1629 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1630 unsigned int enable)
1632 unsigned int timeout = 1000;
1635 reg = tdma_readl(priv, TDMA_CONTROL);
1637 reg |= tdma_control_bit(priv, TDMA_EN);
1639 reg &= ~tdma_control_bit(priv, TDMA_EN);
1640 tdma_writel(priv, reg, TDMA_CONTROL);
1642 /* Poll for TMDA disabling completion */
1644 reg = tdma_readl(priv, TDMA_STATUS);
1645 if (!!(reg & TDMA_DISABLED) == !enable)
1648 usleep_range(1000, 2000);
1649 } while (timeout-- > 0);
1651 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1656 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1658 struct bcm_sysport_cb *cb;
1663 /* Initialize SW view of the RX ring */
1664 priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC;
1665 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1666 priv->rx_c_index = 0;
1667 priv->rx_read_ptr = 0;
1668 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1670 if (!priv->rx_cbs) {
1671 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1675 for (i = 0; i < priv->num_rx_bds; i++) {
1676 cb = priv->rx_cbs + i;
1677 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1680 ret = bcm_sysport_alloc_rx_bufs(priv);
1682 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1686 /* Initialize HW, ensure RDMA is disabled */
1687 reg = rdma_readl(priv, RDMA_STATUS);
1688 if (!(reg & RDMA_DISABLED))
1689 rdma_enable_set(priv, 0);
1691 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1692 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1693 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1694 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1695 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1696 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1697 /* Operate the queue in ring mode */
1698 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1699 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1700 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1701 rdma_writel(priv, priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO);
1703 netif_dbg(priv, hw, priv->netdev,
1704 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1705 priv->num_rx_bds, priv->rx_bds);
1710 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1712 struct bcm_sysport_cb *cb;
1716 /* Caller should ensure RDMA is disabled */
1717 reg = rdma_readl(priv, RDMA_STATUS);
1718 if (!(reg & RDMA_DISABLED))
1719 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1721 for (i = 0; i < priv->num_rx_bds; i++) {
1722 cb = &priv->rx_cbs[i];
1723 if (dma_unmap_addr(cb, dma_addr))
1724 dma_unmap_single(&priv->pdev->dev,
1725 dma_unmap_addr(cb, dma_addr),
1726 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1727 bcm_sysport_free_cb(cb);
1730 kfree(priv->rx_cbs);
1731 priv->rx_cbs = NULL;
1733 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1736 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1738 struct bcm_sysport_priv *priv = netdev_priv(dev);
1744 reg = umac_readl(priv, UMAC_CMD);
1745 if (dev->flags & IFF_PROMISC)
1748 reg &= ~CMD_PROMISC;
1749 umac_writel(priv, reg, UMAC_CMD);
1751 /* No support for ALLMULTI */
1752 if (dev->flags & IFF_ALLMULTI)
1756 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1757 u32 mask, unsigned int enable)
1761 if (!priv->is_lite) {
1762 reg = umac_readl(priv, UMAC_CMD);
1767 umac_writel(priv, reg, UMAC_CMD);
1769 reg = gib_readl(priv, GIB_CONTROL);
1774 gib_writel(priv, reg, GIB_CONTROL);
1777 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1778 * to be processed (1 msec).
1781 usleep_range(1000, 2000);
1784 static inline void umac_reset(struct bcm_sysport_priv *priv)
1791 reg = umac_readl(priv, UMAC_CMD);
1792 reg |= CMD_SW_RESET;
1793 umac_writel(priv, reg, UMAC_CMD);
1795 reg = umac_readl(priv, UMAC_CMD);
1796 reg &= ~CMD_SW_RESET;
1797 umac_writel(priv, reg, UMAC_CMD);
1800 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1801 const unsigned char *addr)
1803 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
1805 u32 mac1 = (addr[4] << 8) | addr[5];
1807 if (!priv->is_lite) {
1808 umac_writel(priv, mac0, UMAC_MAC0);
1809 umac_writel(priv, mac1, UMAC_MAC1);
1811 gib_writel(priv, mac0, GIB_MAC0);
1812 gib_writel(priv, mac1, GIB_MAC1);
1816 static void topctrl_flush(struct bcm_sysport_priv *priv)
1818 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1819 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1821 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1822 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1825 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1827 struct bcm_sysport_priv *priv = netdev_priv(dev);
1828 struct sockaddr *addr = p;
1830 if (!is_valid_ether_addr(addr->sa_data))
1833 eth_hw_addr_set(dev, addr->sa_data);
1835 /* interface is disabled, changes to MAC will be reflected on next
1838 if (!netif_running(dev))
1841 umac_set_hw_addr(priv, dev->dev_addr);
1846 static void bcm_sysport_get_stats64(struct net_device *dev,
1847 struct rtnl_link_stats64 *stats)
1849 struct bcm_sysport_priv *priv = netdev_priv(dev);
1850 struct bcm_sysport_stats64 *stats64 = &priv->stats64;
1853 netdev_stats_to_stats64(stats, &dev->stats);
1855 bcm_sysport_update_tx_stats(priv, &stats->tx_bytes,
1856 &stats->tx_packets);
1859 start = u64_stats_fetch_begin(&priv->syncp);
1860 stats->rx_packets = stats64->rx_packets;
1861 stats->rx_bytes = stats64->rx_bytes;
1862 } while (u64_stats_fetch_retry(&priv->syncp, start));
1865 static void bcm_sysport_netif_start(struct net_device *dev)
1867 struct bcm_sysport_priv *priv = netdev_priv(dev);
1870 bcm_sysport_init_dim(priv, bcm_sysport_dim_work);
1871 bcm_sysport_init_rx_coalesce(priv);
1872 napi_enable(&priv->napi);
1874 /* Enable RX interrupt and TX ring full interrupt */
1875 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1877 phy_start(dev->phydev);
1879 /* Enable TX interrupts for the TXQs */
1881 intrl2_1_mask_clear(priv, 0xffffffff);
1883 intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK);
1886 static void rbuf_init(struct bcm_sysport_priv *priv)
1890 reg = rbuf_readl(priv, RBUF_CONTROL);
1891 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1892 /* Set a correct RSB format on SYSTEMPORT Lite */
1894 reg &= ~RBUF_RSB_SWAP1;
1896 /* Set a correct RSB format based on host endian */
1897 if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
1898 reg |= RBUF_RSB_SWAP0;
1900 reg &= ~RBUF_RSB_SWAP0;
1901 rbuf_writel(priv, reg, RBUF_CONTROL);
1904 static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
1906 intrl2_0_mask_set(priv, 0xffffffff);
1907 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1908 if (!priv->is_lite) {
1909 intrl2_1_mask_set(priv, 0xffffffff);
1910 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1914 static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
1918 reg = gib_readl(priv, GIB_CONTROL);
1919 /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
1920 if (netdev_uses_dsa(priv->netdev)) {
1921 reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
1922 reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
1924 reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
1925 reg |= 12 << GIB_IPG_LEN_SHIFT;
1926 gib_writel(priv, reg, GIB_CONTROL);
1929 static int bcm_sysport_open(struct net_device *dev)
1931 struct bcm_sysport_priv *priv = netdev_priv(dev);
1932 struct phy_device *phydev;
1936 ret = clk_prepare_enable(priv->clk);
1938 netdev_err(dev, "could not enable priv clock\n");
1945 /* Flush TX and RX FIFOs at TOPCTRL level */
1946 topctrl_flush(priv);
1948 /* Disable the UniMAC RX/TX */
1949 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1951 /* Enable RBUF 2bytes alignment and Receive Status Block */
1954 /* Set maximum frame length */
1956 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1958 gib_set_pad_extension(priv);
1960 /* Apply features again in case we changed them while interface was
1963 bcm_sysport_set_features(dev, dev->features);
1965 /* Set MAC address */
1966 umac_set_hw_addr(priv, dev->dev_addr);
1968 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1969 0, priv->phy_interface);
1971 netdev_err(dev, "could not attach to PHY\n");
1973 goto out_clk_disable;
1976 /* Indicate that the MAC is responsible for PHY PM */
1977 phydev->mac_managed_pm = true;
1979 /* Reset house keeping link status */
1980 priv->old_duplex = -1;
1981 priv->old_link = -1;
1982 priv->old_pause = -1;
1984 /* mask all interrupts and request them */
1985 bcm_sysport_mask_all_intrs(priv);
1987 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1989 netdev_err(dev, "failed to request RX interrupt\n");
1990 goto out_phy_disconnect;
1993 if (!priv->is_lite) {
1994 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0,
1997 netdev_err(dev, "failed to request TX interrupt\n");
2002 /* Initialize both hardware and software ring */
2003 spin_lock_init(&priv->desc_lock);
2004 for (i = 0; i < dev->num_tx_queues; i++) {
2005 ret = bcm_sysport_init_tx_ring(priv, i);
2007 netdev_err(dev, "failed to initialize TX ring %d\n",
2009 goto out_free_tx_ring;
2013 /* Initialize linked-list */
2014 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2016 /* Initialize RX ring */
2017 ret = bcm_sysport_init_rx_ring(priv);
2019 netdev_err(dev, "failed to initialize RX ring\n");
2020 goto out_free_rx_ring;
2024 ret = rdma_enable_set(priv, 1);
2026 goto out_free_rx_ring;
2029 ret = tdma_enable_set(priv, 1);
2031 goto out_clear_rx_int;
2033 /* Turn on UniMAC TX/RX */
2034 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
2036 bcm_sysport_netif_start(dev);
2038 netif_tx_start_all_queues(dev);
2043 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
2045 bcm_sysport_fini_rx_ring(priv);
2047 for (i = 0; i < dev->num_tx_queues; i++)
2048 bcm_sysport_fini_tx_ring(priv, i);
2050 free_irq(priv->irq1, dev);
2052 free_irq(priv->irq0, dev);
2054 phy_disconnect(phydev);
2056 clk_disable_unprepare(priv->clk);
2060 static void bcm_sysport_netif_stop(struct net_device *dev)
2062 struct bcm_sysport_priv *priv = netdev_priv(dev);
2064 /* stop all software from updating hardware */
2065 netif_tx_disable(dev);
2066 napi_disable(&priv->napi);
2067 cancel_work_sync(&priv->dim.dim.work);
2068 phy_stop(dev->phydev);
2070 /* mask all interrupts */
2071 bcm_sysport_mask_all_intrs(priv);
2074 static int bcm_sysport_stop(struct net_device *dev)
2076 struct bcm_sysport_priv *priv = netdev_priv(dev);
2080 bcm_sysport_netif_stop(dev);
2082 /* Disable UniMAC RX */
2083 umac_enable_set(priv, CMD_RX_EN, 0);
2085 ret = tdma_enable_set(priv, 0);
2087 netdev_err(dev, "timeout disabling RDMA\n");
2091 /* Wait for a maximum packet size to be drained */
2092 usleep_range(2000, 3000);
2094 ret = rdma_enable_set(priv, 0);
2096 netdev_err(dev, "timeout disabling TDMA\n");
2100 /* Disable UniMAC TX */
2101 umac_enable_set(priv, CMD_TX_EN, 0);
2103 /* Free RX/TX rings SW structures */
2104 for (i = 0; i < dev->num_tx_queues; i++)
2105 bcm_sysport_fini_tx_ring(priv, i);
2106 bcm_sysport_fini_rx_ring(priv);
2108 free_irq(priv->irq0, dev);
2110 free_irq(priv->irq1, dev);
2112 /* Disconnect from PHY */
2113 phy_disconnect(dev->phydev);
2115 clk_disable_unprepare(priv->clk);
2120 static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv,
2126 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2127 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2128 reg >>= RXCHK_BRCM_TAG_CID_SHIFT;
2129 reg &= RXCHK_BRCM_TAG_CID_MASK;
2130 if (reg == location)
2137 static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv,
2138 struct ethtool_rxnfc *nfc)
2142 /* This is not a rule that we know about */
2143 index = bcm_sysport_rule_find(priv, nfc->fs.location);
2147 nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
2152 static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
2153 struct ethtool_rxnfc *nfc)
2158 /* We cannot match locations greater than what the classification ID
2159 * permits (256 entries)
2161 if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
2164 /* We cannot support flows that are not destined for a wake-up */
2165 if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
2168 index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
2169 if (index >= RXCHK_BRCM_TAG_MAX)
2170 /* All filters are already in use, we cannot match more rules */
2173 /* Location is the classification ID, and index is the position
2174 * within one of our 8 possible filters to be programmed
2176 reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index));
2177 reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);
2178 reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT;
2179 rxchk_writel(priv, reg, RXCHK_BRCM_TAG(index));
2180 rxchk_writel(priv, 0xff00ffff, RXCHK_BRCM_TAG_MASK(index));
2182 priv->filters_loc[index] = nfc->fs.location;
2183 set_bit(index, priv->filters);
2188 static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv,
2193 /* This is not a rule that we know about */
2194 index = bcm_sysport_rule_find(priv, location);
2198 /* No need to disable this filter if it was enabled, this will
2199 * be taken care of during suspend time by bcm_sysport_suspend_to_wol
2201 clear_bit(index, priv->filters);
2202 priv->filters_loc[index] = 0;
2207 static int bcm_sysport_get_rxnfc(struct net_device *dev,
2208 struct ethtool_rxnfc *nfc, u32 *rule_locs)
2210 struct bcm_sysport_priv *priv = netdev_priv(dev);
2211 int ret = -EOPNOTSUPP;
2214 case ETHTOOL_GRXCLSRULE:
2215 ret = bcm_sysport_rule_get(priv, nfc);
2224 static int bcm_sysport_set_rxnfc(struct net_device *dev,
2225 struct ethtool_rxnfc *nfc)
2227 struct bcm_sysport_priv *priv = netdev_priv(dev);
2228 int ret = -EOPNOTSUPP;
2231 case ETHTOOL_SRXCLSRLINS:
2232 ret = bcm_sysport_rule_set(priv, nfc);
2234 case ETHTOOL_SRXCLSRLDEL:
2235 ret = bcm_sysport_rule_del(priv, nfc->fs.location);
2244 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
2245 .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
2246 ETHTOOL_COALESCE_MAX_FRAMES |
2247 ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
2248 .get_drvinfo = bcm_sysport_get_drvinfo,
2249 .get_msglevel = bcm_sysport_get_msglvl,
2250 .set_msglevel = bcm_sysport_set_msglvl,
2251 .get_link = ethtool_op_get_link,
2252 .get_strings = bcm_sysport_get_strings,
2253 .get_ethtool_stats = bcm_sysport_get_stats,
2254 .get_sset_count = bcm_sysport_get_sset_count,
2255 .get_wol = bcm_sysport_get_wol,
2256 .set_wol = bcm_sysport_set_wol,
2257 .get_coalesce = bcm_sysport_get_coalesce,
2258 .set_coalesce = bcm_sysport_set_coalesce,
2259 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2260 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2261 .get_rxnfc = bcm_sysport_get_rxnfc,
2262 .set_rxnfc = bcm_sysport_set_rxnfc,
2265 static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb,
2266 struct net_device *sb_dev)
2268 struct bcm_sysport_priv *priv = netdev_priv(dev);
2269 u16 queue = skb_get_queue_mapping(skb);
2270 struct bcm_sysport_tx_ring *tx_ring;
2271 unsigned int q, port;
2273 if (!netdev_uses_dsa(dev))
2274 return netdev_pick_tx(dev, skb, NULL);
2276 /* DSA tagging layer will have configured the correct queue */
2277 q = BRCM_TAG_GET_QUEUE(queue);
2278 port = BRCM_TAG_GET_PORT(queue);
2279 tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues];
2281 if (unlikely(!tx_ring))
2282 return netdev_pick_tx(dev, skb, NULL);
2284 return tx_ring->index;
2287 static const struct net_device_ops bcm_sysport_netdev_ops = {
2288 .ndo_start_xmit = bcm_sysport_xmit,
2289 .ndo_tx_timeout = bcm_sysport_tx_timeout,
2290 .ndo_open = bcm_sysport_open,
2291 .ndo_stop = bcm_sysport_stop,
2292 .ndo_set_features = bcm_sysport_set_features,
2293 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
2294 .ndo_set_mac_address = bcm_sysport_change_mac,
2295 #ifdef CONFIG_NET_POLL_CONTROLLER
2296 .ndo_poll_controller = bcm_sysport_poll_controller,
2298 .ndo_get_stats64 = bcm_sysport_get_stats64,
2299 .ndo_select_queue = bcm_sysport_select_queue,
2302 static int bcm_sysport_map_queues(struct net_device *dev,
2303 struct net_device *slave_dev)
2305 struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2306 struct bcm_sysport_priv *priv = netdev_priv(dev);
2307 struct bcm_sysport_tx_ring *ring;
2308 unsigned int num_tx_queues;
2309 unsigned int q, qp, port;
2311 /* We can't be setting up queue inspection for non directly attached
2319 /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a
2320 * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of
2321 * per-port (slave_dev) network devices queue, we achieve just that.
2322 * This need to happen now before any slave network device is used such
2323 * it accurately reflects the number of real TX queues.
2326 netif_set_real_num_tx_queues(slave_dev,
2327 slave_dev->num_tx_queues / 2);
2329 num_tx_queues = slave_dev->real_num_tx_queues;
2331 if (priv->per_port_num_tx_queues &&
2332 priv->per_port_num_tx_queues != num_tx_queues)
2333 netdev_warn(slave_dev, "asymmetric number of per-port queues\n");
2335 priv->per_port_num_tx_queues = num_tx_queues;
2337 for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues;
2339 ring = &priv->tx_rings[q];
2344 /* Just remember the mapping actual programming done
2345 * during bcm_sysport_init_tx_ring
2347 ring->switch_queue = qp;
2348 ring->switch_port = port;
2349 ring->inspect = true;
2350 priv->ring_map[qp + port * num_tx_queues] = ring;
2357 static int bcm_sysport_unmap_queues(struct net_device *dev,
2358 struct net_device *slave_dev)
2360 struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
2361 struct bcm_sysport_priv *priv = netdev_priv(dev);
2362 struct bcm_sysport_tx_ring *ring;
2363 unsigned int num_tx_queues;
2364 unsigned int q, qp, port;
2368 num_tx_queues = slave_dev->real_num_tx_queues;
2370 for (q = 0; q < dev->num_tx_queues; q++) {
2371 ring = &priv->tx_rings[q];
2373 if (ring->switch_port != port)
2379 ring->inspect = false;
2380 qp = ring->switch_queue;
2381 priv->ring_map[qp + port * num_tx_queues] = NULL;
2387 static int bcm_sysport_netdevice_event(struct notifier_block *nb,
2388 unsigned long event, void *ptr)
2390 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2391 struct netdev_notifier_changeupper_info *info = ptr;
2392 struct bcm_sysport_priv *priv;
2395 priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier);
2396 if (priv->netdev != dev)
2400 case NETDEV_CHANGEUPPER:
2401 if (dev->netdev_ops != &bcm_sysport_netdev_ops)
2404 if (!dsa_user_dev_check(info->upper_dev))
2408 ret = bcm_sysport_map_queues(dev, info->upper_dev);
2410 ret = bcm_sysport_unmap_queues(dev, info->upper_dev);
2414 return notifier_from_errno(ret);
2417 #define REV_FMT "v%2x.%02x"
2419 static const struct bcm_sysport_hw_params bcm_sysport_params[] = {
2422 .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS,
2424 [SYSTEMPORT_LITE] = {
2426 .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS,
2430 static const struct of_device_id bcm_sysport_of_match[] = {
2431 { .compatible = "brcm,systemportlite-v1.00",
2432 .data = &bcm_sysport_params[SYSTEMPORT_LITE] },
2433 { .compatible = "brcm,systemport-v1.00",
2434 .data = &bcm_sysport_params[SYSTEMPORT] },
2435 { .compatible = "brcm,systemport",
2436 .data = &bcm_sysport_params[SYSTEMPORT] },
2439 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2441 static int bcm_sysport_probe(struct platform_device *pdev)
2443 const struct bcm_sysport_hw_params *params;
2444 const struct of_device_id *of_id = NULL;
2445 struct bcm_sysport_priv *priv;
2446 struct device_node *dn;
2447 struct net_device *dev;
2451 dn = pdev->dev.of_node;
2452 of_id = of_match_node(bcm_sysport_of_match, dn);
2453 if (!of_id || !of_id->data)
2456 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
2458 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2460 dev_err(&pdev->dev, "unable to set DMA mask: %d\n", ret);
2464 /* Fairly quickly we need to know the type of adapter we have */
2465 params = of_id->data;
2467 /* Read the Transmit/Receive Queue properties */
2468 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
2469 txq = TDMA_NUM_RINGS;
2470 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
2473 /* Sanity check the number of transmit queues */
2474 if (!txq || txq > TDMA_NUM_RINGS)
2477 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
2481 /* Initialize private members */
2482 priv = netdev_priv(dev);
2484 priv->clk = devm_clk_get_optional(&pdev->dev, "sw_sysport");
2485 if (IS_ERR(priv->clk)) {
2486 ret = PTR_ERR(priv->clk);
2487 goto err_free_netdev;
2490 /* Allocate number of TX rings */
2491 priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
2492 sizeof(struct bcm_sysport_tx_ring),
2494 if (!priv->tx_rings) {
2496 goto err_free_netdev;
2499 priv->is_lite = params->is_lite;
2500 priv->num_rx_desc_words = params->num_rx_desc_words;
2502 priv->irq0 = platform_get_irq(pdev, 0);
2503 if (!priv->is_lite) {
2504 priv->irq1 = platform_get_irq(pdev, 1);
2505 priv->wol_irq = platform_get_irq_optional(pdev, 2);
2507 priv->wol_irq = platform_get_irq_optional(pdev, 1);
2509 if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) {
2511 goto err_free_netdev;
2514 priv->base = devm_platform_ioremap_resource(pdev, 0);
2515 if (IS_ERR(priv->base)) {
2516 ret = PTR_ERR(priv->base);
2517 goto err_free_netdev;
2523 ret = of_get_phy_mode(dn, &priv->phy_interface);
2524 /* Default to GMII interface mode */
2526 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
2528 /* In the case of a fixed PHY, the DT node associated
2529 * to the PHY is the Ethernet MAC DT node.
2531 if (of_phy_is_fixed_link(dn)) {
2532 ret = of_phy_register_fixed_link(dn);
2534 dev_err(&pdev->dev, "failed to register fixed PHY\n");
2535 goto err_free_netdev;
2541 /* Initialize netdevice members */
2542 ret = of_get_ethdev_address(dn, dev);
2544 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
2545 eth_hw_addr_random(dev);
2548 SET_NETDEV_DEV(dev, &pdev->dev);
2549 dev_set_drvdata(&pdev->dev, dev);
2550 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
2551 dev->netdev_ops = &bcm_sysport_netdev_ops;
2552 netif_napi_add(dev, &priv->napi, bcm_sysport_poll);
2554 dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
2555 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2556 NETIF_F_HW_VLAN_CTAG_TX;
2557 dev->hw_features |= dev->features;
2558 dev->vlan_features |= dev->features;
2559 dev->max_mtu = UMAC_MAX_MTU_SIZE;
2561 /* Request the WOL interrupt and advertise suspend if available */
2562 priv->wol_irq_disabled = 1;
2563 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
2564 bcm_sysport_wol_isr, 0, dev->name, priv);
2566 device_set_wakeup_capable(&pdev->dev, 1);
2568 priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol");
2569 if (IS_ERR(priv->wol_clk)) {
2570 ret = PTR_ERR(priv->wol_clk);
2571 goto err_deregister_fixed_link;
2574 /* Set the needed headroom once and for all */
2575 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
2576 dev->needed_headroom += sizeof(struct bcm_tsb);
2578 /* libphy will adjust the link state accordingly */
2579 netif_carrier_off(dev);
2581 priv->rx_max_coalesced_frames = 1;
2582 u64_stats_init(&priv->syncp);
2584 priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event;
2586 ret = register_netdevice_notifier(&priv->netdev_notifier);
2588 dev_err(&pdev->dev, "failed to register DSA notifier\n");
2589 goto err_deregister_fixed_link;
2592 ret = register_netdev(dev);
2594 dev_err(&pdev->dev, "failed to register net_device\n");
2595 goto err_deregister_notifier;
2598 ret = clk_prepare_enable(priv->clk);
2600 dev_err(&pdev->dev, "could not enable priv clock\n");
2601 goto err_deregister_netdev;
2604 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
2605 dev_info(&pdev->dev,
2606 "Broadcom SYSTEMPORT%s " REV_FMT
2607 " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
2608 priv->is_lite ? " Lite" : "",
2609 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
2610 priv->irq0, priv->irq1, txq, rxq);
2612 clk_disable_unprepare(priv->clk);
2616 err_deregister_netdev:
2617 unregister_netdev(dev);
2618 err_deregister_notifier:
2619 unregister_netdevice_notifier(&priv->netdev_notifier);
2620 err_deregister_fixed_link:
2621 if (of_phy_is_fixed_link(dn))
2622 of_phy_deregister_fixed_link(dn);
2628 static void bcm_sysport_remove(struct platform_device *pdev)
2630 struct net_device *dev = dev_get_drvdata(&pdev->dev);
2631 struct bcm_sysport_priv *priv = netdev_priv(dev);
2632 struct device_node *dn = pdev->dev.of_node;
2634 /* Not much to do, ndo_close has been called
2635 * and we use managed allocations
2637 unregister_netdevice_notifier(&priv->netdev_notifier);
2638 unregister_netdev(dev);
2639 if (of_phy_is_fixed_link(dn))
2640 of_phy_deregister_fixed_link(dn);
2642 dev_set_drvdata(&pdev->dev, NULL);
2645 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
2647 struct net_device *ndev = priv->netdev;
2648 unsigned int timeout = 1000;
2649 unsigned int index, i = 0;
2652 reg = umac_readl(priv, UMAC_MPD_CTRL);
2653 if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
2656 if (priv->wolopts & WAKE_MAGICSECURE) {
2657 /* Program the SecureOn password */
2658 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
2660 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
2664 umac_writel(priv, reg, UMAC_MPD_CTRL);
2666 if (priv->wolopts & WAKE_FILTER) {
2667 /* Turn on ACPI matching to steal packets from RBUF */
2668 reg = rbuf_readl(priv, RBUF_CONTROL);
2670 reg |= RBUF_ACPI_EN_LITE;
2672 reg |= RBUF_ACPI_EN;
2673 rbuf_writel(priv, reg, RBUF_CONTROL);
2675 /* Enable RXCHK, active filters and Broadcom tag matching */
2676 reg = rxchk_readl(priv, RXCHK_CONTROL);
2677 reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK <<
2678 RXCHK_BRCM_TAG_MATCH_SHIFT);
2679 for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) {
2680 reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i);
2683 reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN;
2684 rxchk_writel(priv, reg, RXCHK_CONTROL);
2687 /* Make sure RBUF entered WoL mode as result */
2689 reg = rbuf_readl(priv, RBUF_STATUS);
2690 if (reg & RBUF_WOL_MODE)
2694 } while (timeout-- > 0);
2696 /* Do not leave the UniMAC RBUF matching only MPD packets */
2698 mpd_enable_set(priv, false);
2699 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
2703 /* UniMAC receive needs to be turned on */
2704 umac_enable_set(priv, CMD_RX_EN, 1);
2706 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
2711 static int __maybe_unused bcm_sysport_suspend(struct device *d)
2713 struct net_device *dev = dev_get_drvdata(d);
2714 struct bcm_sysport_priv *priv = netdev_priv(dev);
2719 if (!netif_running(dev))
2722 netif_device_detach(dev);
2724 bcm_sysport_netif_stop(dev);
2726 phy_suspend(dev->phydev);
2728 /* Disable UniMAC RX */
2729 umac_enable_set(priv, CMD_RX_EN, 0);
2731 ret = rdma_enable_set(priv, 0);
2733 netdev_err(dev, "RDMA timeout!\n");
2737 /* Disable RXCHK if enabled */
2738 if (priv->rx_chk_en) {
2739 reg = rxchk_readl(priv, RXCHK_CONTROL);
2741 rxchk_writel(priv, reg, RXCHK_CONTROL);
2746 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
2748 ret = tdma_enable_set(priv, 0);
2750 netdev_err(dev, "TDMA timeout!\n");
2754 /* Wait for a packet boundary */
2755 usleep_range(2000, 3000);
2757 umac_enable_set(priv, CMD_TX_EN, 0);
2759 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
2761 /* Free RX/TX rings SW structures */
2762 for (i = 0; i < dev->num_tx_queues; i++)
2763 bcm_sysport_fini_tx_ring(priv, i);
2764 bcm_sysport_fini_rx_ring(priv);
2766 /* Get prepared for Wake-on-LAN */
2767 if (device_may_wakeup(d) && priv->wolopts) {
2768 clk_prepare_enable(priv->wol_clk);
2769 ret = bcm_sysport_suspend_to_wol(priv);
2772 clk_disable_unprepare(priv->clk);
2777 static int __maybe_unused bcm_sysport_resume(struct device *d)
2779 struct net_device *dev = dev_get_drvdata(d);
2780 struct bcm_sysport_priv *priv = netdev_priv(dev);
2784 if (!netif_running(dev))
2787 ret = clk_prepare_enable(priv->clk);
2789 netdev_err(dev, "could not enable priv clock\n");
2794 clk_disable_unprepare(priv->wol_clk);
2798 /* Disable the UniMAC RX/TX */
2799 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
2801 /* We may have been suspended and never received a WOL event that
2802 * would turn off MPD detection, take care of that now
2804 bcm_sysport_resume_from_wol(priv);
2806 /* Initialize both hardware and software ring */
2807 for (i = 0; i < dev->num_tx_queues; i++) {
2808 ret = bcm_sysport_init_tx_ring(priv, i);
2810 netdev_err(dev, "failed to initialize TX ring %d\n",
2812 goto out_free_tx_rings;
2816 /* Initialize linked-list */
2817 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2819 /* Initialize RX ring */
2820 ret = bcm_sysport_init_rx_ring(priv);
2822 netdev_err(dev, "failed to initialize RX ring\n");
2823 goto out_free_rx_ring;
2826 /* RX pipe enable */
2827 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2829 ret = rdma_enable_set(priv, 1);
2831 netdev_err(dev, "failed to enable RDMA\n");
2832 goto out_free_rx_ring;
2835 /* Restore enabled features */
2836 bcm_sysport_set_features(dev, dev->features);
2840 /* Set maximum frame length */
2842 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2844 gib_set_pad_extension(priv);
2846 /* Set MAC address */
2847 umac_set_hw_addr(priv, dev->dev_addr);
2849 umac_enable_set(priv, CMD_RX_EN, 1);
2851 /* TX pipe enable */
2852 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2854 umac_enable_set(priv, CMD_TX_EN, 1);
2856 ret = tdma_enable_set(priv, 1);
2858 netdev_err(dev, "TDMA timeout!\n");
2859 goto out_free_rx_ring;
2862 phy_resume(dev->phydev);
2864 bcm_sysport_netif_start(dev);
2866 netif_device_attach(dev);
2871 bcm_sysport_fini_rx_ring(priv);
2873 for (i = 0; i < dev->num_tx_queues; i++)
2874 bcm_sysport_fini_tx_ring(priv, i);
2875 clk_disable_unprepare(priv->clk);
2879 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2880 bcm_sysport_suspend, bcm_sysport_resume);
2882 static struct platform_driver bcm_sysport_driver = {
2883 .probe = bcm_sysport_probe,
2884 .remove = bcm_sysport_remove,
2886 .name = "brcm-systemport",
2887 .of_match_table = bcm_sysport_of_match,
2888 .pm = &bcm_sysport_pm_ops,
2891 module_platform_driver(bcm_sysport_driver);
2893 MODULE_AUTHOR("Broadcom Corporation");
2894 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2895 MODULE_ALIAS("platform:brcm-systemport");
2896 MODULE_LICENSE("GPL");