2 * Broadcom BCM7xxx System Port Ethernet MAC driver
4 * Copyright (C) 2014 Broadcom Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/platform_device.h>
21 #include <linux/of_net.h>
22 #include <linux/of_mdio.h>
23 #include <linux/phy.h>
24 #include <linux/phy_fixed.h>
28 #include "bcmsysport.h"
30 /* I/O accessors register helpers */
31 #define BCM_SYSPORT_IO_MACRO(name, offset) \
32 static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \
34 u32 reg = __raw_readl(priv->base + offset + off); \
37 static inline void name##_writel(struct bcm_sysport_priv *priv, \
40 __raw_writel(val, priv->base + offset + off); \
43 BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
44 BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
45 BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
46 BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
47 BCM_SYSPORT_IO_MACRO(rdma, SYS_PORT_RDMA_OFFSET);
48 BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
49 BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
50 BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
51 BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
52 BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
54 /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied
55 * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths.
57 #define BCM_SYSPORT_INTR_L2(which) \
58 static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
61 priv->irq##which##_mask &= ~(mask); \
62 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
64 static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
67 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
68 priv->irq##which##_mask |= (mask); \
71 BCM_SYSPORT_INTR_L2(0)
72 BCM_SYSPORT_INTR_L2(1)
74 /* Register accesses to GISB/RBUS registers are expensive (few hundred
75 * nanoseconds), so keep the check for 64-bits explicit here to save
76 * one register write per-packet on 32-bits platforms.
78 static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
82 #ifdef CONFIG_PHYS_ADDR_T_64BIT
83 __raw_writel(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
84 d + DESC_ADDR_HI_STATUS_LEN);
86 __raw_writel(lower_32_bits(addr), d + DESC_ADDR_LO);
89 static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
90 struct dma_desc *desc,
93 unsigned long desc_flags;
95 /* Ports are latched, so write upper address first */
96 spin_lock_irqsave(&priv->desc_lock, desc_flags);
97 tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
98 tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
99 spin_unlock_irqrestore(&priv->desc_lock, desc_flags);
102 /* Ethtool operations */
103 static int bcm_sysport_set_rx_csum(struct net_device *dev,
104 netdev_features_t wanted)
106 struct bcm_sysport_priv *priv = netdev_priv(dev);
109 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
110 reg = rxchk_readl(priv, RXCHK_CONTROL);
111 /* Clear L2 header checks, which would prevent BPDUs
112 * from being received.
114 reg &= ~RXCHK_L2_HDR_DIS;
120 /* If UniMAC forwards CRC, we need to skip over it to get
121 * a valid CHK bit to be set in the per-packet status word
123 if (priv->rx_chk_en && priv->crc_fwd)
124 reg |= RXCHK_SKIP_FCS;
126 reg &= ~RXCHK_SKIP_FCS;
128 /* If Broadcom tags are enabled (e.g: using a switch), make
129 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
130 * tag after the Ethernet MAC Source Address.
132 if (netdev_uses_dsa(dev))
133 reg |= RXCHK_BRCM_TAG_EN;
135 reg &= ~RXCHK_BRCM_TAG_EN;
137 rxchk_writel(priv, reg, RXCHK_CONTROL);
142 static int bcm_sysport_set_tx_csum(struct net_device *dev,
143 netdev_features_t wanted)
145 struct bcm_sysport_priv *priv = netdev_priv(dev);
148 /* Hardware transmit checksum requires us to enable the Transmit status
149 * block prepended to the packet contents
151 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
152 reg = tdma_readl(priv, TDMA_CONTROL);
157 tdma_writel(priv, reg, TDMA_CONTROL);
162 static int bcm_sysport_set_features(struct net_device *dev,
163 netdev_features_t features)
165 netdev_features_t changed = features ^ dev->features;
166 netdev_features_t wanted = dev->wanted_features;
169 if (changed & NETIF_F_RXCSUM)
170 ret = bcm_sysport_set_rx_csum(dev, wanted);
171 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
172 ret = bcm_sysport_set_tx_csum(dev, wanted);
177 /* Hardware counters must be kept in sync because the order/offset
178 * is important here (order in structure declaration = order in hardware)
180 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
182 STAT_NETDEV(rx_packets),
183 STAT_NETDEV(tx_packets),
184 STAT_NETDEV(rx_bytes),
185 STAT_NETDEV(tx_bytes),
186 STAT_NETDEV(rx_errors),
187 STAT_NETDEV(tx_errors),
188 STAT_NETDEV(rx_dropped),
189 STAT_NETDEV(tx_dropped),
190 STAT_NETDEV(multicast),
191 /* UniMAC RSV counters */
192 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
193 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
194 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
195 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
196 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
197 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
198 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
199 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
200 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
201 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
202 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
203 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
204 STAT_MIB_RX("rx_multicast", mib.rx.mca),
205 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
206 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
207 STAT_MIB_RX("rx_control", mib.rx.cf),
208 STAT_MIB_RX("rx_pause", mib.rx.pf),
209 STAT_MIB_RX("rx_unknown", mib.rx.uo),
210 STAT_MIB_RX("rx_align", mib.rx.aln),
211 STAT_MIB_RX("rx_outrange", mib.rx.flr),
212 STAT_MIB_RX("rx_code", mib.rx.cde),
213 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
214 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
215 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
216 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
217 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
218 STAT_MIB_RX("rx_unicast", mib.rx.uc),
219 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
220 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
221 /* UniMAC TSV counters */
222 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
223 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
224 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
225 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
226 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
227 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
228 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
229 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
230 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
231 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
232 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
233 STAT_MIB_TX("tx_multicast", mib.tx.mca),
234 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
235 STAT_MIB_TX("tx_pause", mib.tx.pf),
236 STAT_MIB_TX("tx_control", mib.tx.cf),
237 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
238 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
239 STAT_MIB_TX("tx_defer", mib.tx.drf),
240 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
241 STAT_MIB_TX("tx_single_col", mib.tx.scl),
242 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
243 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
244 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
245 STAT_MIB_TX("tx_frags", mib.tx.frg),
246 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
247 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
248 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
249 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
250 STAT_MIB_TX("tx_unicast", mib.tx.uc),
251 /* UniMAC RUNT counters */
252 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
253 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
254 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
255 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
256 /* RXCHK misc statistics */
257 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
258 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
259 RXCHK_OTHER_DISC_CNTR),
260 /* RBUF misc statistics */
261 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
262 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
263 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
264 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
265 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
268 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
270 static void bcm_sysport_get_drvinfo(struct net_device *dev,
271 struct ethtool_drvinfo *info)
273 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
274 strlcpy(info->version, "0.1", sizeof(info->version));
275 strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
278 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
280 struct bcm_sysport_priv *priv = netdev_priv(dev);
282 return priv->msg_enable;
285 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
287 struct bcm_sysport_priv *priv = netdev_priv(dev);
289 priv->msg_enable = enable;
292 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
294 switch (string_set) {
296 return BCM_SYSPORT_STATS_LEN;
302 static void bcm_sysport_get_strings(struct net_device *dev,
303 u32 stringset, u8 *data)
309 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
310 memcpy(data + i * ETH_GSTRING_LEN,
311 bcm_sysport_gstrings_stats[i].stat_string,
320 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
324 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
325 const struct bcm_sysport_stats *s;
330 s = &bcm_sysport_gstrings_stats[i];
332 case BCM_SYSPORT_STAT_NETDEV:
333 case BCM_SYSPORT_STAT_SOFT:
335 case BCM_SYSPORT_STAT_MIB_RX:
336 case BCM_SYSPORT_STAT_MIB_TX:
337 case BCM_SYSPORT_STAT_RUNT:
338 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
339 offset = UMAC_MIB_STAT_OFFSET;
340 val = umac_readl(priv, UMAC_MIB_START + j + offset);
342 case BCM_SYSPORT_STAT_RXCHK:
343 val = rxchk_readl(priv, s->reg_offset);
345 rxchk_writel(priv, 0, s->reg_offset);
347 case BCM_SYSPORT_STAT_RBUF:
348 val = rbuf_readl(priv, s->reg_offset);
350 rbuf_writel(priv, 0, s->reg_offset);
355 p = (char *)priv + s->stat_offset;
359 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
362 static void bcm_sysport_get_stats(struct net_device *dev,
363 struct ethtool_stats *stats, u64 *data)
365 struct bcm_sysport_priv *priv = netdev_priv(dev);
368 if (netif_running(dev))
369 bcm_sysport_update_mib_counters(priv);
371 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
372 const struct bcm_sysport_stats *s;
375 s = &bcm_sysport_gstrings_stats[i];
376 if (s->type == BCM_SYSPORT_STAT_NETDEV)
377 p = (char *)&dev->stats;
381 data[i] = *(unsigned long *)p;
385 static void bcm_sysport_get_wol(struct net_device *dev,
386 struct ethtool_wolinfo *wol)
388 struct bcm_sysport_priv *priv = netdev_priv(dev);
390 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
391 wol->wolopts = priv->wolopts;
393 if (!(priv->wolopts & WAKE_MAGICSECURE))
396 memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
399 static int bcm_sysport_set_wol(struct net_device *dev,
400 struct ethtool_wolinfo *wol)
402 struct bcm_sysport_priv *priv = netdev_priv(dev);
403 struct device *kdev = &priv->pdev->dev;
404 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
406 if (!device_can_wakeup(kdev))
409 if (wol->wolopts & ~supported)
412 if (wol->wolopts & WAKE_MAGICSECURE)
413 memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
415 /* Flag the device and relevant IRQ as wakeup capable */
417 device_set_wakeup_enable(kdev, 1);
418 if (priv->wol_irq_disabled)
419 enable_irq_wake(priv->wol_irq);
420 priv->wol_irq_disabled = 0;
422 device_set_wakeup_enable(kdev, 0);
423 /* Avoid unbalanced disable_irq_wake calls */
424 if (!priv->wol_irq_disabled)
425 disable_irq_wake(priv->wol_irq);
426 priv->wol_irq_disabled = 1;
429 priv->wolopts = wol->wolopts;
434 static int bcm_sysport_get_coalesce(struct net_device *dev,
435 struct ethtool_coalesce *ec)
437 struct bcm_sysport_priv *priv = netdev_priv(dev);
440 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
442 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
443 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
445 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
447 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
448 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
453 static int bcm_sysport_set_coalesce(struct net_device *dev,
454 struct ethtool_coalesce *ec)
456 struct bcm_sysport_priv *priv = netdev_priv(dev);
460 /* Base system clock is 125Mhz, DMA timeout is this reference clock
461 * divided by 1024, which yield roughly 8.192 us, our maximum value has
462 * to fit in the RING_TIMEOUT_MASK (16 bits).
464 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
465 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
466 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
467 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
470 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
471 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
474 for (i = 0; i < dev->num_tx_queues; i++) {
475 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i));
476 reg &= ~(RING_INTR_THRESH_MASK |
477 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
478 reg |= ec->tx_max_coalesced_frames;
479 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
481 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i));
484 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
485 reg &= ~(RDMA_INTR_THRESH_MASK |
486 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
487 reg |= ec->rx_max_coalesced_frames;
488 reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) <<
490 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
495 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
497 dev_kfree_skb_any(cb->skb);
499 dma_unmap_addr_set(cb, dma_addr, 0);
502 static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
503 struct bcm_sysport_cb *cb)
505 struct device *kdev = &priv->pdev->dev;
506 struct net_device *ndev = priv->netdev;
507 struct sk_buff *skb, *rx_skb;
510 /* Allocate a new SKB for a new packet */
511 skb = __netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH,
512 GFP_ATOMIC | __GFP_NOWARN);
514 priv->mib.alloc_rx_buff_failed++;
515 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
519 mapping = dma_map_single(kdev, skb->data,
520 RX_BUF_LENGTH, DMA_FROM_DEVICE);
521 if (dma_mapping_error(kdev, mapping)) {
522 priv->mib.rx_dma_failed++;
523 dev_kfree_skb_any(skb);
524 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
528 /* Grab the current SKB on the ring */
531 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
532 RX_BUF_LENGTH, DMA_FROM_DEVICE);
534 /* Put the new SKB on the ring */
536 dma_unmap_addr_set(cb, dma_addr, mapping);
537 dma_desc_set_addr(priv, cb->bd_addr, mapping);
539 netif_dbg(priv, rx_status, ndev, "RX refill\n");
541 /* Return the current SKB to the caller */
545 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
547 struct bcm_sysport_cb *cb;
551 for (i = 0; i < priv->num_rx_bds; i++) {
552 cb = &priv->rx_cbs[i];
553 skb = bcm_sysport_rx_refill(priv, cb);
563 /* Poll the hardware for up to budget packets to process */
564 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
567 struct net_device *ndev = priv->netdev;
568 unsigned int processed = 0, to_process;
569 struct bcm_sysport_cb *cb;
571 unsigned int p_index;
575 /* Determine how much we should process since last call */
576 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
577 p_index &= RDMA_PROD_INDEX_MASK;
579 if (p_index < priv->rx_c_index)
580 to_process = (RDMA_CONS_INDEX_MASK + 1) -
581 priv->rx_c_index + p_index;
583 to_process = p_index - priv->rx_c_index;
585 netif_dbg(priv, rx_status, ndev,
586 "p_index=%d rx_c_index=%d to_process=%d\n",
587 p_index, priv->rx_c_index, to_process);
589 while ((processed < to_process) && (processed < budget)) {
590 cb = &priv->rx_cbs[priv->rx_read_ptr];
591 skb = bcm_sysport_rx_refill(priv, cb);
594 /* We do not have a backing SKB, so we do not a corresponding
595 * DMA mapping for this incoming packet since
596 * bcm_sysport_rx_refill always either has both skb and mapping
599 if (unlikely(!skb)) {
600 netif_err(priv, rx_err, ndev, "out of memory!\n");
601 ndev->stats.rx_dropped++;
602 ndev->stats.rx_errors++;
606 /* Extract the Receive Status Block prepended */
607 rsb = (struct bcm_rsb *)skb->data;
608 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
609 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
612 netif_dbg(priv, rx_status, ndev,
613 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
614 p_index, priv->rx_c_index, priv->rx_read_ptr,
617 if (unlikely(len > RX_BUF_LENGTH)) {
618 netif_err(priv, rx_status, ndev, "oversized packet\n");
619 ndev->stats.rx_length_errors++;
620 ndev->stats.rx_errors++;
621 dev_kfree_skb_any(skb);
625 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
626 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
627 ndev->stats.rx_dropped++;
628 ndev->stats.rx_errors++;
629 dev_kfree_skb_any(skb);
633 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
634 netif_err(priv, rx_err, ndev, "error packet\n");
635 if (status & RX_STATUS_OVFLOW)
636 ndev->stats.rx_over_errors++;
637 ndev->stats.rx_dropped++;
638 ndev->stats.rx_errors++;
639 dev_kfree_skb_any(skb);
645 /* Hardware validated our checksum */
646 if (likely(status & DESC_L4_CSUM))
647 skb->ip_summed = CHECKSUM_UNNECESSARY;
649 /* Hardware pre-pends packets with 2bytes before Ethernet
650 * header plus we have the Receive Status Block, strip off all
651 * of this from the SKB.
653 skb_pull(skb, sizeof(*rsb) + 2);
654 len -= (sizeof(*rsb) + 2);
656 /* UniMAC may forward CRC */
658 skb_trim(skb, len - ETH_FCS_LEN);
662 skb->protocol = eth_type_trans(skb, ndev);
663 ndev->stats.rx_packets++;
664 ndev->stats.rx_bytes += len;
666 napi_gro_receive(&priv->napi, skb);
671 if (priv->rx_read_ptr == priv->num_rx_bds)
672 priv->rx_read_ptr = 0;
678 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_priv *priv,
679 struct bcm_sysport_cb *cb,
680 unsigned int *bytes_compl,
681 unsigned int *pkts_compl)
683 struct device *kdev = &priv->pdev->dev;
684 struct net_device *ndev = priv->netdev;
687 ndev->stats.tx_bytes += cb->skb->len;
688 *bytes_compl += cb->skb->len;
689 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
690 dma_unmap_len(cb, dma_len),
692 ndev->stats.tx_packets++;
694 bcm_sysport_free_cb(cb);
696 } else if (dma_unmap_addr(cb, dma_addr)) {
697 ndev->stats.tx_bytes += dma_unmap_len(cb, dma_len);
698 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
699 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
700 dma_unmap_addr_set(cb, dma_addr, 0);
704 /* Reclaim queued SKBs for transmission completion, lockless version */
705 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
706 struct bcm_sysport_tx_ring *ring)
708 struct net_device *ndev = priv->netdev;
709 unsigned int pkts_compl = 0, bytes_compl = 0;
710 unsigned int txbds_processed = 0;
711 struct bcm_sysport_cb *cb;
712 unsigned int txbds_ready;
713 unsigned int c_index;
716 /* Compute how many descriptors have been processed since last call */
717 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
718 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
719 txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK;
721 netif_dbg(priv, tx_done, ndev,
722 "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
723 ring->index, ring->c_index, c_index, txbds_ready);
725 while (txbds_processed < txbds_ready) {
726 cb = &ring->cbs[ring->clean_index];
727 bcm_sysport_tx_reclaim_one(priv, cb, &bytes_compl, &pkts_compl);
732 if (likely(ring->clean_index < ring->size - 1))
735 ring->clean_index = 0;
738 ring->c_index = c_index;
740 netif_dbg(priv, tx_done, ndev,
741 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
742 ring->index, ring->c_index, pkts_compl, bytes_compl);
747 /* Locked version of the per-ring TX reclaim routine */
748 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
749 struct bcm_sysport_tx_ring *ring)
751 struct netdev_queue *txq;
752 unsigned int released;
755 txq = netdev_get_tx_queue(priv->netdev, ring->index);
757 spin_lock_irqsave(&ring->lock, flags);
758 released = __bcm_sysport_tx_reclaim(priv, ring);
760 netif_tx_wake_queue(txq);
762 spin_unlock_irqrestore(&ring->lock, flags);
767 /* Locked version of the per-ring TX reclaim, but does not wake the queue */
768 static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv,
769 struct bcm_sysport_tx_ring *ring)
773 spin_lock_irqsave(&ring->lock, flags);
774 __bcm_sysport_tx_reclaim(priv, ring);
775 spin_unlock_irqrestore(&ring->lock, flags);
778 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
780 struct bcm_sysport_tx_ring *ring =
781 container_of(napi, struct bcm_sysport_tx_ring, napi);
782 unsigned int work_done = 0;
784 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
786 if (work_done == 0) {
788 /* re-enable TX interrupt */
789 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
797 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
801 for (q = 0; q < priv->netdev->num_tx_queues; q++)
802 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
805 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
807 struct bcm_sysport_priv *priv =
808 container_of(napi, struct bcm_sysport_priv, napi);
809 unsigned int work_done = 0;
811 work_done = bcm_sysport_desc_rx(priv, budget);
813 priv->rx_c_index += work_done;
814 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
815 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
817 if (work_done < budget) {
818 napi_complete_done(napi, work_done);
819 /* re-enable RX interrupts */
820 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
826 static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
830 /* Clear the MagicPacket detection logic */
831 reg = umac_readl(priv, UMAC_MPD_CTRL);
833 umac_writel(priv, reg, UMAC_MPD_CTRL);
835 reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS);
836 if (reg & INTRL2_0_MPD)
837 netdev_info(priv->netdev, "Wake-on-LAN (MPD) interrupt!\n");
839 if (reg & INTRL2_0_BRCM_MATCH_TAG) {
840 reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) &
841 RXCHK_BRCM_TAG_MATCH_MASK;
842 netdev_info(priv->netdev,
843 "Wake-on-LAN (filters 0x%02x) interrupt!\n", reg);
846 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
849 /* RX and misc interrupt routine */
850 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
852 struct net_device *dev = dev_id;
853 struct bcm_sysport_priv *priv = netdev_priv(dev);
855 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
856 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
857 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
859 if (unlikely(priv->irq0_stat == 0)) {
860 netdev_warn(priv->netdev, "spurious RX interrupt\n");
864 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
865 if (likely(napi_schedule_prep(&priv->napi))) {
866 /* disable RX interrupts */
867 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
868 __napi_schedule_irqoff(&priv->napi);
872 /* TX ring is full, perform a full reclaim since we do not know
873 * which one would trigger this interrupt
875 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
876 bcm_sysport_tx_reclaim_all(priv);
881 /* TX interrupt service routine */
882 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
884 struct net_device *dev = dev_id;
885 struct bcm_sysport_priv *priv = netdev_priv(dev);
886 struct bcm_sysport_tx_ring *txr;
889 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
890 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
891 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
893 if (unlikely(priv->irq1_stat == 0)) {
894 netdev_warn(priv->netdev, "spurious TX interrupt\n");
898 for (ring = 0; ring < dev->num_tx_queues; ring++) {
899 if (!(priv->irq1_stat & BIT(ring)))
902 txr = &priv->tx_rings[ring];
904 if (likely(napi_schedule_prep(&txr->napi))) {
905 intrl2_1_mask_set(priv, BIT(ring));
906 __napi_schedule_irqoff(&txr->napi);
913 static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
915 struct bcm_sysport_priv *priv = dev_id;
917 pm_wakeup_event(&priv->pdev->dev, 0);
922 #ifdef CONFIG_NET_POLL_CONTROLLER
923 static void bcm_sysport_poll_controller(struct net_device *dev)
925 struct bcm_sysport_priv *priv = netdev_priv(dev);
927 disable_irq(priv->irq0);
928 bcm_sysport_rx_isr(priv->irq0, priv);
929 enable_irq(priv->irq0);
931 disable_irq(priv->irq1);
932 bcm_sysport_tx_isr(priv->irq1, priv);
933 enable_irq(priv->irq1);
937 static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
938 struct net_device *dev)
940 struct sk_buff *nskb;
947 /* Re-allocate SKB if needed */
948 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
949 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
952 dev->stats.tx_errors++;
953 dev->stats.tx_dropped++;
959 tsb = (struct bcm_tsb *)skb_push(skb, sizeof(*tsb));
960 /* Zero-out TSB by default */
961 memset(tsb, 0, sizeof(*tsb));
963 if (skb->ip_summed == CHECKSUM_PARTIAL) {
964 ip_ver = htons(skb->protocol);
967 ip_proto = ip_hdr(skb)->protocol;
970 ip_proto = ipv6_hdr(skb)->nexthdr;
976 /* Get the checksum offset and the L4 (transport) offset */
977 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
978 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
979 csum_info |= (csum_start << L4_PTR_SHIFT);
981 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
982 csum_info |= L4_LENGTH_VALID;
983 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
989 tsb->l4_ptr_dest_map = csum_info;
995 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
996 struct net_device *dev)
998 struct bcm_sysport_priv *priv = netdev_priv(dev);
999 struct device *kdev = &priv->pdev->dev;
1000 struct bcm_sysport_tx_ring *ring;
1001 struct bcm_sysport_cb *cb;
1002 struct netdev_queue *txq;
1003 struct dma_desc *desc;
1004 unsigned int skb_len;
1005 unsigned long flags;
1011 queue = skb_get_queue_mapping(skb);
1012 txq = netdev_get_tx_queue(dev, queue);
1013 ring = &priv->tx_rings[queue];
1015 /* lock against tx reclaim in BH context and TX ring full interrupt */
1016 spin_lock_irqsave(&ring->lock, flags);
1017 if (unlikely(ring->desc_count == 0)) {
1018 netif_tx_stop_queue(txq);
1019 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1020 ret = NETDEV_TX_BUSY;
1024 /* The Ethernet switch we are interfaced with needs packets to be at
1025 * least 64 bytes (including FCS) otherwise they will be discarded when
1026 * they enter the switch port logic. When Broadcom tags are enabled, we
1027 * need to make sure that packets are at least 68 bytes
1028 * (including FCS and tag) because the length verification is done after
1029 * the Broadcom tag is stripped off the ingress packet.
1031 if (skb_put_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
1036 /* Insert TSB and checksum infos */
1038 skb = bcm_sysport_insert_tsb(skb, dev);
1047 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1048 if (dma_mapping_error(kdev, mapping)) {
1049 priv->mib.tx_dma_failed++;
1050 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
1051 skb->data, skb_len);
1056 /* Remember the SKB for future freeing */
1057 cb = &ring->cbs[ring->curr_desc];
1059 dma_unmap_addr_set(cb, dma_addr, mapping);
1060 dma_unmap_len_set(cb, dma_len, skb_len);
1062 /* Fetch a descriptor entry from our pool */
1063 desc = ring->desc_cpu;
1065 desc->addr_lo = lower_32_bits(mapping);
1066 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
1067 len_status |= (skb_len << DESC_LEN_SHIFT);
1068 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
1070 if (skb->ip_summed == CHECKSUM_PARTIAL)
1071 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1074 if (ring->curr_desc == ring->size)
1075 ring->curr_desc = 0;
1078 /* Ensure write completion of the descriptor status/length
1079 * in DRAM before the System Port WRITE_PORT register latches
1083 desc->addr_status_len = len_status;
1086 /* Write this descriptor address to the RING write port */
1087 tdma_port_write_desc_addr(priv, desc, ring->index);
1089 /* Check ring space and update SW control flow */
1090 if (ring->desc_count == 0)
1091 netif_tx_stop_queue(txq);
1093 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
1094 ring->index, ring->desc_count, ring->curr_desc);
1098 spin_unlock_irqrestore(&ring->lock, flags);
1102 static void bcm_sysport_tx_timeout(struct net_device *dev)
1104 netdev_warn(dev, "transmit timeout!\n");
1106 netif_trans_update(dev);
1107 dev->stats.tx_errors++;
1109 netif_tx_wake_all_queues(dev);
1112 /* phylib adjust link callback */
1113 static void bcm_sysport_adj_link(struct net_device *dev)
1115 struct bcm_sysport_priv *priv = netdev_priv(dev);
1116 struct phy_device *phydev = dev->phydev;
1117 unsigned int changed = 0;
1118 u32 cmd_bits = 0, reg;
1120 if (priv->old_link != phydev->link) {
1122 priv->old_link = phydev->link;
1125 if (priv->old_duplex != phydev->duplex) {
1127 priv->old_duplex = phydev->duplex;
1130 switch (phydev->speed) {
1132 cmd_bits = CMD_SPEED_2500;
1135 cmd_bits = CMD_SPEED_1000;
1138 cmd_bits = CMD_SPEED_100;
1141 cmd_bits = CMD_SPEED_10;
1146 cmd_bits <<= CMD_SPEED_SHIFT;
1148 if (phydev->duplex == DUPLEX_HALF)
1149 cmd_bits |= CMD_HD_EN;
1151 if (priv->old_pause != phydev->pause) {
1153 priv->old_pause = phydev->pause;
1157 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1163 reg = umac_readl(priv, UMAC_CMD);
1164 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
1165 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1166 CMD_TX_PAUSE_IGNORE);
1168 umac_writel(priv, reg, UMAC_CMD);
1171 phy_print_status(phydev);
1174 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1177 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1178 struct device *kdev = &priv->pdev->dev;
1183 /* Simple descriptors partitioning for now */
1186 /* We just need one DMA descriptor which is DMA-able, since writing to
1187 * the port will allocate a new descriptor in its internal linked-list
1189 p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1192 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1196 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1198 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1202 /* Initialize SW view of the ring */
1203 spin_lock_init(&ring->lock);
1205 netif_tx_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1206 ring->index = index;
1208 ring->clean_index = 0;
1209 ring->alloc_size = ring->size;
1211 ring->desc_count = ring->size;
1212 ring->curr_desc = 0;
1214 /* Initialize HW ring */
1215 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1216 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1217 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1218 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1219 tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
1220 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1222 /* Program the number of descriptors as MAX_THRESHOLD and half of
1223 * its size for the hysteresis trigger
1225 tdma_writel(priv, ring->size |
1226 1 << RING_HYST_THRESH_SHIFT,
1227 TDMA_DESC_RING_MAX_HYST(index));
1229 /* Enable the ring queue in the arbiter */
1230 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1231 reg |= (1 << index);
1232 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1234 napi_enable(&ring->napi);
1236 netif_dbg(priv, hw, priv->netdev,
1237 "TDMA cfg, size=%d, desc_cpu=%p\n",
1238 ring->size, ring->desc_cpu);
1243 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1246 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1247 struct device *kdev = &priv->pdev->dev;
1250 /* Caller should stop the TDMA engine */
1251 reg = tdma_readl(priv, TDMA_STATUS);
1252 if (!(reg & TDMA_DISABLED))
1253 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1255 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1256 * fail, so by checking this pointer we know whether the TX ring was
1257 * fully initialized or not.
1262 napi_disable(&ring->napi);
1263 netif_napi_del(&ring->napi);
1265 bcm_sysport_tx_clean(priv, ring);
1270 if (ring->desc_dma) {
1271 dma_free_coherent(kdev, sizeof(struct dma_desc),
1272 ring->desc_cpu, ring->desc_dma);
1276 ring->alloc_size = 0;
1278 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1282 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1283 unsigned int enable)
1285 unsigned int timeout = 1000;
1288 reg = rdma_readl(priv, RDMA_CONTROL);
1293 rdma_writel(priv, reg, RDMA_CONTROL);
1295 /* Poll for RMDA disabling completion */
1297 reg = rdma_readl(priv, RDMA_STATUS);
1298 if (!!(reg & RDMA_DISABLED) == !enable)
1300 usleep_range(1000, 2000);
1301 } while (timeout-- > 0);
1303 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1309 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1310 unsigned int enable)
1312 unsigned int timeout = 1000;
1315 reg = tdma_readl(priv, TDMA_CONTROL);
1320 tdma_writel(priv, reg, TDMA_CONTROL);
1322 /* Poll for TMDA disabling completion */
1324 reg = tdma_readl(priv, TDMA_STATUS);
1325 if (!!(reg & TDMA_DISABLED) == !enable)
1328 usleep_range(1000, 2000);
1329 } while (timeout-- > 0);
1331 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1336 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1338 struct bcm_sysport_cb *cb;
1343 /* Initialize SW view of the RX ring */
1344 priv->num_rx_bds = NUM_RX_DESC;
1345 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1346 priv->rx_c_index = 0;
1347 priv->rx_read_ptr = 0;
1348 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1350 if (!priv->rx_cbs) {
1351 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1355 for (i = 0; i < priv->num_rx_bds; i++) {
1356 cb = priv->rx_cbs + i;
1357 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1360 ret = bcm_sysport_alloc_rx_bufs(priv);
1362 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1366 /* Initialize HW, ensure RDMA is disabled */
1367 reg = rdma_readl(priv, RDMA_STATUS);
1368 if (!(reg & RDMA_DISABLED))
1369 rdma_enable_set(priv, 0);
1371 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1372 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1373 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1374 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1375 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1376 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1377 /* Operate the queue in ring mode */
1378 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1379 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1380 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1381 rdma_writel(priv, NUM_HW_RX_DESC_WORDS - 1, RDMA_END_ADDR_LO);
1383 rdma_writel(priv, 1, RDMA_MBDONE_INTR);
1385 netif_dbg(priv, hw, priv->netdev,
1386 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1387 priv->num_rx_bds, priv->rx_bds);
1392 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1394 struct bcm_sysport_cb *cb;
1398 /* Caller should ensure RDMA is disabled */
1399 reg = rdma_readl(priv, RDMA_STATUS);
1400 if (!(reg & RDMA_DISABLED))
1401 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1403 for (i = 0; i < priv->num_rx_bds; i++) {
1404 cb = &priv->rx_cbs[i];
1405 if (dma_unmap_addr(cb, dma_addr))
1406 dma_unmap_single(&priv->pdev->dev,
1407 dma_unmap_addr(cb, dma_addr),
1408 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1409 bcm_sysport_free_cb(cb);
1412 kfree(priv->rx_cbs);
1413 priv->rx_cbs = NULL;
1415 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1418 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1420 struct bcm_sysport_priv *priv = netdev_priv(dev);
1423 reg = umac_readl(priv, UMAC_CMD);
1424 if (dev->flags & IFF_PROMISC)
1427 reg &= ~CMD_PROMISC;
1428 umac_writel(priv, reg, UMAC_CMD);
1430 /* No support for ALLMULTI */
1431 if (dev->flags & IFF_ALLMULTI)
1435 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1436 u32 mask, unsigned int enable)
1440 reg = umac_readl(priv, UMAC_CMD);
1445 umac_writel(priv, reg, UMAC_CMD);
1447 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1448 * to be processed (1 msec).
1451 usleep_range(1000, 2000);
1454 static inline void umac_reset(struct bcm_sysport_priv *priv)
1458 reg = umac_readl(priv, UMAC_CMD);
1459 reg |= CMD_SW_RESET;
1460 umac_writel(priv, reg, UMAC_CMD);
1462 reg = umac_readl(priv, UMAC_CMD);
1463 reg &= ~CMD_SW_RESET;
1464 umac_writel(priv, reg, UMAC_CMD);
1467 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1468 unsigned char *addr)
1470 umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) |
1471 (addr[2] << 8) | addr[3], UMAC_MAC0);
1472 umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1);
1475 static void topctrl_flush(struct bcm_sysport_priv *priv)
1477 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1478 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1480 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1481 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1484 static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1486 struct bcm_sysport_priv *priv = netdev_priv(dev);
1487 struct sockaddr *addr = p;
1489 if (!is_valid_ether_addr(addr->sa_data))
1492 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1494 /* interface is disabled, changes to MAC will be reflected on next
1497 if (!netif_running(dev))
1500 umac_set_hw_addr(priv, dev->dev_addr);
1505 static void bcm_sysport_netif_start(struct net_device *dev)
1507 struct bcm_sysport_priv *priv = netdev_priv(dev);
1510 napi_enable(&priv->napi);
1512 /* Enable RX interrupt and TX ring full interrupt */
1513 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1515 phy_start(dev->phydev);
1517 /* Enable TX interrupts for the 32 TXQs */
1518 intrl2_1_mask_clear(priv, 0xffffffff);
1520 /* Last call before we start the real business */
1521 netif_tx_start_all_queues(dev);
1524 static void rbuf_init(struct bcm_sysport_priv *priv)
1528 reg = rbuf_readl(priv, RBUF_CONTROL);
1529 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1530 rbuf_writel(priv, reg, RBUF_CONTROL);
1533 static int bcm_sysport_open(struct net_device *dev)
1535 struct bcm_sysport_priv *priv = netdev_priv(dev);
1536 struct phy_device *phydev;
1543 /* Flush TX and RX FIFOs at TOPCTRL level */
1544 topctrl_flush(priv);
1546 /* Disable the UniMAC RX/TX */
1547 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1549 /* Enable RBUF 2bytes alignment and Receive Status Block */
1552 /* Set maximum frame length */
1553 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1555 /* Set MAC address */
1556 umac_set_hw_addr(priv, dev->dev_addr);
1558 /* Read CRC forward */
1559 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
1561 phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1562 0, priv->phy_interface);
1564 netdev_err(dev, "could not attach to PHY\n");
1568 /* Reset house keeping link status */
1569 priv->old_duplex = -1;
1570 priv->old_link = -1;
1571 priv->old_pause = -1;
1573 /* mask all interrupts and request them */
1574 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
1575 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1576 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1577 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
1578 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1579 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1581 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1583 netdev_err(dev, "failed to request RX interrupt\n");
1584 goto out_phy_disconnect;
1587 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, dev->name, dev);
1589 netdev_err(dev, "failed to request TX interrupt\n");
1593 /* Initialize both hardware and software ring */
1594 spin_lock_init(&priv->desc_lock);
1595 for (i = 0; i < dev->num_tx_queues; i++) {
1596 ret = bcm_sysport_init_tx_ring(priv, i);
1598 netdev_err(dev, "failed to initialize TX ring %d\n",
1600 goto out_free_tx_ring;
1604 /* Initialize linked-list */
1605 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1607 /* Initialize RX ring */
1608 ret = bcm_sysport_init_rx_ring(priv);
1610 netdev_err(dev, "failed to initialize RX ring\n");
1611 goto out_free_rx_ring;
1615 ret = rdma_enable_set(priv, 1);
1617 goto out_free_rx_ring;
1620 ret = tdma_enable_set(priv, 1);
1622 goto out_clear_rx_int;
1624 /* Turn on UniMAC TX/RX */
1625 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
1627 bcm_sysport_netif_start(dev);
1632 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1634 bcm_sysport_fini_rx_ring(priv);
1636 for (i = 0; i < dev->num_tx_queues; i++)
1637 bcm_sysport_fini_tx_ring(priv, i);
1638 free_irq(priv->irq1, dev);
1640 free_irq(priv->irq0, dev);
1642 phy_disconnect(phydev);
1646 static void bcm_sysport_netif_stop(struct net_device *dev)
1648 struct bcm_sysport_priv *priv = netdev_priv(dev);
1650 /* stop all software from updating hardware */
1651 netif_tx_stop_all_queues(dev);
1652 napi_disable(&priv->napi);
1653 phy_stop(dev->phydev);
1655 /* mask all interrupts */
1656 intrl2_0_mask_set(priv, 0xffffffff);
1657 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1658 intrl2_1_mask_set(priv, 0xffffffff);
1659 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1662 static int bcm_sysport_stop(struct net_device *dev)
1664 struct bcm_sysport_priv *priv = netdev_priv(dev);
1668 bcm_sysport_netif_stop(dev);
1670 /* Disable UniMAC RX */
1671 umac_enable_set(priv, CMD_RX_EN, 0);
1673 ret = tdma_enable_set(priv, 0);
1675 netdev_err(dev, "timeout disabling RDMA\n");
1679 /* Wait for a maximum packet size to be drained */
1680 usleep_range(2000, 3000);
1682 ret = rdma_enable_set(priv, 0);
1684 netdev_err(dev, "timeout disabling TDMA\n");
1688 /* Disable UniMAC TX */
1689 umac_enable_set(priv, CMD_TX_EN, 0);
1691 /* Free RX/TX rings SW structures */
1692 for (i = 0; i < dev->num_tx_queues; i++)
1693 bcm_sysport_fini_tx_ring(priv, i);
1694 bcm_sysport_fini_rx_ring(priv);
1696 free_irq(priv->irq0, dev);
1697 free_irq(priv->irq1, dev);
1699 /* Disconnect from PHY */
1700 phy_disconnect(dev->phydev);
1705 static const struct ethtool_ops bcm_sysport_ethtool_ops = {
1706 .get_drvinfo = bcm_sysport_get_drvinfo,
1707 .get_msglevel = bcm_sysport_get_msglvl,
1708 .set_msglevel = bcm_sysport_set_msglvl,
1709 .get_link = ethtool_op_get_link,
1710 .get_strings = bcm_sysport_get_strings,
1711 .get_ethtool_stats = bcm_sysport_get_stats,
1712 .get_sset_count = bcm_sysport_get_sset_count,
1713 .get_wol = bcm_sysport_get_wol,
1714 .set_wol = bcm_sysport_set_wol,
1715 .get_coalesce = bcm_sysport_get_coalesce,
1716 .set_coalesce = bcm_sysport_set_coalesce,
1717 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1718 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1721 static const struct net_device_ops bcm_sysport_netdev_ops = {
1722 .ndo_start_xmit = bcm_sysport_xmit,
1723 .ndo_tx_timeout = bcm_sysport_tx_timeout,
1724 .ndo_open = bcm_sysport_open,
1725 .ndo_stop = bcm_sysport_stop,
1726 .ndo_set_features = bcm_sysport_set_features,
1727 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
1728 .ndo_set_mac_address = bcm_sysport_change_mac,
1729 #ifdef CONFIG_NET_POLL_CONTROLLER
1730 .ndo_poll_controller = bcm_sysport_poll_controller,
1734 #define REV_FMT "v%2x.%02x"
1736 static int bcm_sysport_probe(struct platform_device *pdev)
1738 struct bcm_sysport_priv *priv;
1739 struct device_node *dn;
1740 struct net_device *dev;
1741 const void *macaddr;
1746 dn = pdev->dev.of_node;
1747 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1749 /* Read the Transmit/Receive Queue properties */
1750 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
1751 txq = TDMA_NUM_RINGS;
1752 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
1755 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
1759 /* Initialize private members */
1760 priv = netdev_priv(dev);
1762 priv->irq0 = platform_get_irq(pdev, 0);
1763 priv->irq1 = platform_get_irq(pdev, 1);
1764 priv->wol_irq = platform_get_irq(pdev, 2);
1765 if (priv->irq0 <= 0 || priv->irq1 <= 0) {
1766 dev_err(&pdev->dev, "invalid interrupts\n");
1768 goto err_free_netdev;
1771 priv->base = devm_ioremap_resource(&pdev->dev, r);
1772 if (IS_ERR(priv->base)) {
1773 ret = PTR_ERR(priv->base);
1774 goto err_free_netdev;
1780 priv->phy_interface = of_get_phy_mode(dn);
1781 /* Default to GMII interface mode */
1782 if ((int)priv->phy_interface < 0)
1783 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
1785 /* In the case of a fixed PHY, the DT node associated
1786 * to the PHY is the Ethernet MAC DT node.
1788 if (of_phy_is_fixed_link(dn)) {
1789 ret = of_phy_register_fixed_link(dn);
1791 dev_err(&pdev->dev, "failed to register fixed PHY\n");
1792 goto err_free_netdev;
1798 /* Initialize netdevice members */
1799 macaddr = of_get_mac_address(dn);
1800 if (!macaddr || !is_valid_ether_addr(macaddr)) {
1801 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
1802 eth_hw_addr_random(dev);
1804 ether_addr_copy(dev->dev_addr, macaddr);
1807 SET_NETDEV_DEV(dev, &pdev->dev);
1808 dev_set_drvdata(&pdev->dev, dev);
1809 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
1810 dev->netdev_ops = &bcm_sysport_netdev_ops;
1811 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
1813 /* HW supported features, none enabled by default */
1814 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
1815 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1817 /* Request the WOL interrupt and advertise suspend if available */
1818 priv->wol_irq_disabled = 1;
1819 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
1820 bcm_sysport_wol_isr, 0, dev->name, priv);
1822 device_set_wakeup_capable(&pdev->dev, 1);
1824 /* Set the needed headroom once and for all */
1825 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
1826 dev->needed_headroom += sizeof(struct bcm_tsb);
1828 /* libphy will adjust the link state accordingly */
1829 netif_carrier_off(dev);
1831 ret = register_netdev(dev);
1833 dev_err(&pdev->dev, "failed to register net_device\n");
1834 goto err_deregister_fixed_link;
1837 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
1838 dev_info(&pdev->dev,
1839 "Broadcom SYSTEMPORT" REV_FMT
1840 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
1841 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
1842 priv->base, priv->irq0, priv->irq1, txq, rxq);
1846 err_deregister_fixed_link:
1847 if (of_phy_is_fixed_link(dn))
1848 of_phy_deregister_fixed_link(dn);
1854 static int bcm_sysport_remove(struct platform_device *pdev)
1856 struct net_device *dev = dev_get_drvdata(&pdev->dev);
1857 struct device_node *dn = pdev->dev.of_node;
1859 /* Not much to do, ndo_close has been called
1860 * and we use managed allocations
1862 unregister_netdev(dev);
1863 if (of_phy_is_fixed_link(dn))
1864 of_phy_deregister_fixed_link(dn);
1866 dev_set_drvdata(&pdev->dev, NULL);
1871 #ifdef CONFIG_PM_SLEEP
1872 static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
1874 struct net_device *ndev = priv->netdev;
1875 unsigned int timeout = 1000;
1878 reg = umac_readl(priv, UMAC_MPD_CTRL);
1881 if (priv->wolopts & WAKE_MAGICSECURE) {
1882 /* Program the SecureOn password */
1883 umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
1885 umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
1889 umac_writel(priv, reg, UMAC_MPD_CTRL);
1891 /* Make sure RBUF entered WoL mode as result */
1893 reg = rbuf_readl(priv, RBUF_STATUS);
1894 if (reg & RBUF_WOL_MODE)
1898 } while (timeout-- > 0);
1900 /* Do not leave the UniMAC RBUF matching only MPD packets */
1902 reg = umac_readl(priv, UMAC_MPD_CTRL);
1904 umac_writel(priv, reg, UMAC_MPD_CTRL);
1905 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
1909 /* UniMAC receive needs to be turned on */
1910 umac_enable_set(priv, CMD_RX_EN, 1);
1912 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
1917 static int bcm_sysport_suspend(struct device *d)
1919 struct net_device *dev = dev_get_drvdata(d);
1920 struct bcm_sysport_priv *priv = netdev_priv(dev);
1925 if (!netif_running(dev))
1928 bcm_sysport_netif_stop(dev);
1930 phy_suspend(dev->phydev);
1932 netif_device_detach(dev);
1934 /* Disable UniMAC RX */
1935 umac_enable_set(priv, CMD_RX_EN, 0);
1937 ret = rdma_enable_set(priv, 0);
1939 netdev_err(dev, "RDMA timeout!\n");
1943 /* Disable RXCHK if enabled */
1944 if (priv->rx_chk_en) {
1945 reg = rxchk_readl(priv, RXCHK_CONTROL);
1947 rxchk_writel(priv, reg, RXCHK_CONTROL);
1952 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1954 ret = tdma_enable_set(priv, 0);
1956 netdev_err(dev, "TDMA timeout!\n");
1960 /* Wait for a packet boundary */
1961 usleep_range(2000, 3000);
1963 umac_enable_set(priv, CMD_TX_EN, 0);
1965 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1967 /* Free RX/TX rings SW structures */
1968 for (i = 0; i < dev->num_tx_queues; i++)
1969 bcm_sysport_fini_tx_ring(priv, i);
1970 bcm_sysport_fini_rx_ring(priv);
1972 /* Get prepared for Wake-on-LAN */
1973 if (device_may_wakeup(d) && priv->wolopts)
1974 ret = bcm_sysport_suspend_to_wol(priv);
1979 static int bcm_sysport_resume(struct device *d)
1981 struct net_device *dev = dev_get_drvdata(d);
1982 struct bcm_sysport_priv *priv = netdev_priv(dev);
1987 if (!netif_running(dev))
1992 /* Disable the UniMAC RX/TX */
1993 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
1995 /* We may have been suspended and never received a WOL event that
1996 * would turn off MPD detection, take care of that now
1998 bcm_sysport_resume_from_wol(priv);
2000 /* Initialize both hardware and software ring */
2001 for (i = 0; i < dev->num_tx_queues; i++) {
2002 ret = bcm_sysport_init_tx_ring(priv, i);
2004 netdev_err(dev, "failed to initialize TX ring %d\n",
2006 goto out_free_tx_rings;
2010 /* Initialize linked-list */
2011 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2013 /* Initialize RX ring */
2014 ret = bcm_sysport_init_rx_ring(priv);
2016 netdev_err(dev, "failed to initialize RX ring\n");
2017 goto out_free_rx_ring;
2020 netif_device_attach(dev);
2022 /* RX pipe enable */
2023 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2025 ret = rdma_enable_set(priv, 1);
2027 netdev_err(dev, "failed to enable RDMA\n");
2028 goto out_free_rx_ring;
2032 if (priv->rx_chk_en) {
2033 reg = rxchk_readl(priv, RXCHK_CONTROL);
2035 rxchk_writel(priv, reg, RXCHK_CONTROL);
2040 /* Set maximum frame length */
2041 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2043 /* Set MAC address */
2044 umac_set_hw_addr(priv, dev->dev_addr);
2046 umac_enable_set(priv, CMD_RX_EN, 1);
2048 /* TX pipe enable */
2049 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2051 umac_enable_set(priv, CMD_TX_EN, 1);
2053 ret = tdma_enable_set(priv, 1);
2055 netdev_err(dev, "TDMA timeout!\n");
2056 goto out_free_rx_ring;
2059 phy_resume(dev->phydev);
2061 bcm_sysport_netif_start(dev);
2066 bcm_sysport_fini_rx_ring(priv);
2068 for (i = 0; i < dev->num_tx_queues; i++)
2069 bcm_sysport_fini_tx_ring(priv, i);
2074 static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2075 bcm_sysport_suspend, bcm_sysport_resume);
2077 static const struct of_device_id bcm_sysport_of_match[] = {
2078 { .compatible = "brcm,systemport-v1.00" },
2079 { .compatible = "brcm,systemport" },
2082 MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
2084 static struct platform_driver bcm_sysport_driver = {
2085 .probe = bcm_sysport_probe,
2086 .remove = bcm_sysport_remove,
2088 .name = "brcm-systemport",
2089 .of_match_table = bcm_sysport_of_match,
2090 .pm = &bcm_sysport_pm_ops,
2093 module_platform_driver(bcm_sysport_driver);
2095 MODULE_AUTHOR("Broadcom Corporation");
2096 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2097 MODULE_ALIAS("platform:brcm-systemport");
2098 MODULE_LICENSE("GPL");