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 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
62 priv->irq##which##_mask &= ~(mask); \
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 /* Ports are latched, so write upper address first */
94 tdma_writel(priv, desc->addr_status_len, TDMA_WRITE_PORT_HI(port));
95 tdma_writel(priv, desc->addr_lo, TDMA_WRITE_PORT_LO(port));
98 /* Ethtool operations */
99 static int bcm_sysport_set_settings(struct net_device *dev,
100 struct ethtool_cmd *cmd)
102 struct bcm_sysport_priv *priv = netdev_priv(dev);
104 if (!netif_running(dev))
107 return phy_ethtool_sset(priv->phydev, cmd);
110 static int bcm_sysport_get_settings(struct net_device *dev,
111 struct ethtool_cmd *cmd)
113 struct bcm_sysport_priv *priv = netdev_priv(dev);
115 if (!netif_running(dev))
118 return phy_ethtool_gset(priv->phydev, cmd);
121 static int bcm_sysport_set_rx_csum(struct net_device *dev,
122 netdev_features_t wanted)
124 struct bcm_sysport_priv *priv = netdev_priv(dev);
127 priv->rx_csum_en = !!(wanted & NETIF_F_RXCSUM);
128 reg = rxchk_readl(priv, RXCHK_CONTROL);
129 if (priv->rx_csum_en)
134 /* If UniMAC forwards CRC, we need to skip over it to get
135 * a valid CHK bit to be set in the per-packet status word
137 if (priv->rx_csum_en && priv->crc_fwd)
138 reg |= RXCHK_SKIP_FCS;
140 reg &= ~RXCHK_SKIP_FCS;
142 rxchk_writel(priv, reg, RXCHK_CONTROL);
147 static int bcm_sysport_set_tx_csum(struct net_device *dev,
148 netdev_features_t wanted)
150 struct bcm_sysport_priv *priv = netdev_priv(dev);
153 /* Hardware transmit checksum requires us to enable the Transmit status
154 * block prepended to the packet contents
156 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
157 reg = tdma_readl(priv, TDMA_CONTROL);
162 tdma_writel(priv, reg, TDMA_CONTROL);
167 static int bcm_sysport_set_features(struct net_device *dev,
168 netdev_features_t features)
170 netdev_features_t changed = features ^ dev->features;
171 netdev_features_t wanted = dev->wanted_features;
174 if (changed & NETIF_F_RXCSUM)
175 ret = bcm_sysport_set_rx_csum(dev, wanted);
176 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
177 ret = bcm_sysport_set_tx_csum(dev, wanted);
182 /* Hardware counters must be kept in sync because the order/offset
183 * is important here (order in structure declaration = order in hardware)
185 static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
187 STAT_NETDEV(rx_packets),
188 STAT_NETDEV(tx_packets),
189 STAT_NETDEV(rx_bytes),
190 STAT_NETDEV(tx_bytes),
191 STAT_NETDEV(rx_errors),
192 STAT_NETDEV(tx_errors),
193 STAT_NETDEV(rx_dropped),
194 STAT_NETDEV(tx_dropped),
195 STAT_NETDEV(multicast),
196 /* UniMAC RSV counters */
197 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
198 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
199 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
200 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
201 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
202 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
203 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
204 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
205 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
206 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
207 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
208 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
209 STAT_MIB_RX("rx_multicast", mib.rx.mca),
210 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
211 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
212 STAT_MIB_RX("rx_control", mib.rx.cf),
213 STAT_MIB_RX("rx_pause", mib.rx.pf),
214 STAT_MIB_RX("rx_unknown", mib.rx.uo),
215 STAT_MIB_RX("rx_align", mib.rx.aln),
216 STAT_MIB_RX("rx_outrange", mib.rx.flr),
217 STAT_MIB_RX("rx_code", mib.rx.cde),
218 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
219 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
220 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
221 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
222 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
223 STAT_MIB_RX("rx_unicast", mib.rx.uc),
224 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
225 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
226 /* UniMAC TSV counters */
227 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
228 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
229 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
230 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
231 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
232 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
233 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
234 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
235 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
236 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
237 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
238 STAT_MIB_TX("tx_multicast", mib.tx.mca),
239 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
240 STAT_MIB_TX("tx_pause", mib.tx.pf),
241 STAT_MIB_TX("tx_control", mib.tx.cf),
242 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
243 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
244 STAT_MIB_TX("tx_defer", mib.tx.drf),
245 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
246 STAT_MIB_TX("tx_single_col", mib.tx.scl),
247 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
248 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
249 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
250 STAT_MIB_TX("tx_frags", mib.tx.frg),
251 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
252 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
253 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
254 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
255 STAT_MIB_TX("tx_unicast", mib.tx.uc),
256 /* UniMAC RUNT counters */
257 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
258 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
259 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
260 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
261 /* RXCHK misc statistics */
262 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
263 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
264 RXCHK_OTHER_DISC_CNTR),
265 /* RBUF misc statistics */
266 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
267 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
270 #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
272 static void bcm_sysport_get_drvinfo(struct net_device *dev,
273 struct ethtool_drvinfo *info)
275 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
276 strlcpy(info->version, "0.1", sizeof(info->version));
277 strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
278 info->n_stats = BCM_SYSPORT_STATS_LEN;
281 static u32 bcm_sysport_get_msglvl(struct net_device *dev)
283 struct bcm_sysport_priv *priv = netdev_priv(dev);
285 return priv->msg_enable;
288 static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
290 struct bcm_sysport_priv *priv = netdev_priv(dev);
292 priv->msg_enable = enable;
295 static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
297 switch (string_set) {
299 return BCM_SYSPORT_STATS_LEN;
305 static void bcm_sysport_get_strings(struct net_device *dev,
306 u32 stringset, u8 *data)
312 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
313 memcpy(data + i * ETH_GSTRING_LEN,
314 bcm_sysport_gstrings_stats[i].stat_string,
323 static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
327 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
328 const struct bcm_sysport_stats *s;
333 s = &bcm_sysport_gstrings_stats[i];
335 case BCM_SYSPORT_STAT_NETDEV:
337 case BCM_SYSPORT_STAT_MIB_RX:
338 case BCM_SYSPORT_STAT_MIB_TX:
339 case BCM_SYSPORT_STAT_RUNT:
340 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
341 offset = UMAC_MIB_STAT_OFFSET;
342 val = umac_readl(priv, UMAC_MIB_START + j + offset);
344 case BCM_SYSPORT_STAT_RXCHK:
345 val = rxchk_readl(priv, s->reg_offset);
347 rxchk_writel(priv, 0, s->reg_offset);
349 case BCM_SYSPORT_STAT_RBUF:
350 val = rbuf_readl(priv, s->reg_offset);
352 rbuf_writel(priv, 0, s->reg_offset);
357 p = (char *)priv + s->stat_offset;
361 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
364 static void bcm_sysport_get_stats(struct net_device *dev,
365 struct ethtool_stats *stats, u64 *data)
367 struct bcm_sysport_priv *priv = netdev_priv(dev);
370 if (netif_running(dev))
371 bcm_sysport_update_mib_counters(priv);
373 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
374 const struct bcm_sysport_stats *s;
377 s = &bcm_sysport_gstrings_stats[i];
378 if (s->type == BCM_SYSPORT_STAT_NETDEV)
379 p = (char *)&dev->stats;
387 static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
389 dev_kfree_skb_any(cb->skb);
391 dma_unmap_addr_set(cb, dma_addr, 0);
394 static int bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
395 struct bcm_sysport_cb *cb)
397 struct device *kdev = &priv->pdev->dev;
398 struct net_device *ndev = priv->netdev;
402 cb->skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
404 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
408 mapping = dma_map_single(kdev, cb->skb->data,
409 RX_BUF_LENGTH, DMA_FROM_DEVICE);
410 ret = dma_mapping_error(kdev, mapping);
412 bcm_sysport_free_cb(cb);
413 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
417 dma_unmap_addr_set(cb, dma_addr, mapping);
418 dma_desc_set_addr(priv, priv->rx_bd_assign_ptr, mapping);
420 priv->rx_bd_assign_index++;
421 priv->rx_bd_assign_index &= (priv->num_rx_bds - 1);
422 priv->rx_bd_assign_ptr = priv->rx_bds +
423 (priv->rx_bd_assign_index * DESC_SIZE);
425 netif_dbg(priv, rx_status, ndev, "RX refill\n");
430 static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
432 struct bcm_sysport_cb *cb;
436 for (i = 0; i < priv->num_rx_bds; i++) {
437 cb = &priv->rx_cbs[priv->rx_bd_assign_index];
441 ret = bcm_sysport_rx_refill(priv, cb);
449 /* Poll the hardware for up to budget packets to process */
450 static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
453 struct device *kdev = &priv->pdev->dev;
454 struct net_device *ndev = priv->netdev;
455 unsigned int processed = 0, to_process;
456 struct bcm_sysport_cb *cb;
458 unsigned int p_index;
462 /* Determine how much we should process since last call */
463 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
464 p_index &= RDMA_PROD_INDEX_MASK;
466 if (p_index < priv->rx_c_index)
467 to_process = (RDMA_CONS_INDEX_MASK + 1) -
468 priv->rx_c_index + p_index;
470 to_process = p_index - priv->rx_c_index;
472 netif_dbg(priv, rx_status, ndev,
473 "p_index=%d rx_c_index=%d to_process=%d\n",
474 p_index, priv->rx_c_index, to_process);
476 while ((processed < to_process) &&
477 (processed < budget)) {
479 cb = &priv->rx_cbs[priv->rx_read_ptr];
481 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
482 RX_BUF_LENGTH, DMA_FROM_DEVICE);
484 /* Extract the Receive Status Block prepended */
485 rsb = (struct bcm_rsb *)skb->data;
486 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
487 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
492 if (priv->rx_read_ptr == priv->num_rx_bds)
493 priv->rx_read_ptr = 0;
495 netif_dbg(priv, rx_status, ndev,
496 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
497 p_index, priv->rx_c_index, priv->rx_read_ptr,
500 if (unlikely(!skb)) {
501 netif_err(priv, rx_err, ndev, "out of memory!\n");
502 ndev->stats.rx_dropped++;
503 ndev->stats.rx_errors++;
507 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
508 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
509 ndev->stats.rx_dropped++;
510 ndev->stats.rx_errors++;
511 bcm_sysport_free_cb(cb);
515 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
516 netif_err(priv, rx_err, ndev, "error packet\n");
517 if (status & RX_STATUS_OVFLOW)
518 ndev->stats.rx_over_errors++;
519 ndev->stats.rx_dropped++;
520 ndev->stats.rx_errors++;
521 bcm_sysport_free_cb(cb);
527 /* Hardware validated our checksum */
528 if (likely(status & DESC_L4_CSUM))
529 skb->ip_summed = CHECKSUM_UNNECESSARY;
531 /* Hardware pre-pends packets with 2bytes before Ethernet
532 * header plus we have the Receive Status Block, strip off all
533 * of this from the SKB.
535 skb_pull(skb, sizeof(*rsb) + 2);
536 len -= (sizeof(*rsb) + 2);
538 /* UniMAC may forward CRC */
540 skb_trim(skb, len - ETH_FCS_LEN);
544 skb->protocol = eth_type_trans(skb, ndev);
545 ndev->stats.rx_packets++;
546 ndev->stats.rx_bytes += len;
548 napi_gro_receive(&priv->napi, skb);
550 bcm_sysport_rx_refill(priv, cb);
556 static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_priv *priv,
557 struct bcm_sysport_cb *cb,
558 unsigned int *bytes_compl,
559 unsigned int *pkts_compl)
561 struct device *kdev = &priv->pdev->dev;
562 struct net_device *ndev = priv->netdev;
565 ndev->stats.tx_bytes += cb->skb->len;
566 *bytes_compl += cb->skb->len;
567 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
568 dma_unmap_len(cb, dma_len),
570 ndev->stats.tx_packets++;
572 bcm_sysport_free_cb(cb);
574 } else if (dma_unmap_addr(cb, dma_addr)) {
575 ndev->stats.tx_bytes += dma_unmap_len(cb, dma_len);
576 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
577 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
578 dma_unmap_addr_set(cb, dma_addr, 0);
582 /* Reclaim queued SKBs for transmission completion, lockless version */
583 static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
584 struct bcm_sysport_tx_ring *ring)
586 struct net_device *ndev = priv->netdev;
587 unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs;
588 unsigned int pkts_compl = 0, bytes_compl = 0;
589 struct bcm_sysport_cb *cb;
590 struct netdev_queue *txq;
593 txq = netdev_get_tx_queue(ndev, ring->index);
595 /* Compute how many descriptors have been processed since last call */
596 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
597 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
598 ring->p_index = (hw_ind & RING_PROD_INDEX_MASK);
600 last_c_index = ring->c_index;
601 num_tx_cbs = ring->size;
603 c_index &= (num_tx_cbs - 1);
605 if (c_index >= last_c_index)
606 last_tx_cn = c_index - last_c_index;
608 last_tx_cn = num_tx_cbs - last_c_index + c_index;
610 netif_dbg(priv, tx_done, ndev,
611 "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n",
612 ring->index, c_index, last_tx_cn, last_c_index);
614 while (last_tx_cn-- > 0) {
615 cb = ring->cbs + last_c_index;
616 bcm_sysport_tx_reclaim_one(priv, cb, &bytes_compl, &pkts_compl);
620 last_c_index &= (num_tx_cbs - 1);
623 ring->c_index = c_index;
625 if (netif_tx_queue_stopped(txq) && pkts_compl)
626 netif_tx_wake_queue(txq);
628 netif_dbg(priv, tx_done, ndev,
629 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
630 ring->index, ring->c_index, pkts_compl, bytes_compl);
635 /* Locked version of the per-ring TX reclaim routine */
636 static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
637 struct bcm_sysport_tx_ring *ring)
639 unsigned int released;
642 spin_lock_irqsave(&ring->lock, flags);
643 released = __bcm_sysport_tx_reclaim(priv, ring);
644 spin_unlock_irqrestore(&ring->lock, flags);
649 static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
651 struct bcm_sysport_tx_ring *ring =
652 container_of(napi, struct bcm_sysport_tx_ring, napi);
653 unsigned int work_done = 0;
655 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
657 if (work_done == 0) {
659 /* re-enable TX interrupt */
660 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
666 static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
670 for (q = 0; q < priv->netdev->num_tx_queues; q++)
671 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
674 static int bcm_sysport_poll(struct napi_struct *napi, int budget)
676 struct bcm_sysport_priv *priv =
677 container_of(napi, struct bcm_sysport_priv, napi);
678 unsigned int work_done = 0;
680 work_done = bcm_sysport_desc_rx(priv, budget);
682 priv->rx_c_index += work_done;
683 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
684 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
686 if (work_done < budget) {
688 /* re-enable RX interrupts */
689 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
696 /* RX and misc interrupt routine */
697 static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
699 struct net_device *dev = dev_id;
700 struct bcm_sysport_priv *priv = netdev_priv(dev);
702 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
703 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
704 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
706 if (unlikely(priv->irq0_stat == 0)) {
707 netdev_warn(priv->netdev, "spurious RX interrupt\n");
711 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
712 if (likely(napi_schedule_prep(&priv->napi))) {
713 /* disable RX interrupts */
714 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
715 __napi_schedule(&priv->napi);
719 /* TX ring is full, perform a full reclaim since we do not know
720 * which one would trigger this interrupt
722 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
723 bcm_sysport_tx_reclaim_all(priv);
728 /* TX interrupt service routine */
729 static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
731 struct net_device *dev = dev_id;
732 struct bcm_sysport_priv *priv = netdev_priv(dev);
733 struct bcm_sysport_tx_ring *txr;
736 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
737 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
738 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
740 if (unlikely(priv->irq1_stat == 0)) {
741 netdev_warn(priv->netdev, "spurious TX interrupt\n");
745 for (ring = 0; ring < dev->num_tx_queues; ring++) {
746 if (!(priv->irq1_stat & BIT(ring)))
749 txr = &priv->tx_rings[ring];
751 if (likely(napi_schedule_prep(&txr->napi))) {
752 intrl2_1_mask_set(priv, BIT(ring));
753 __napi_schedule(&txr->napi);
760 static int bcm_sysport_insert_tsb(struct sk_buff *skb, struct net_device *dev)
762 struct sk_buff *nskb;
769 /* Re-allocate SKB if needed */
770 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
771 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
774 dev->stats.tx_errors++;
775 dev->stats.tx_dropped++;
781 tsb = (struct bcm_tsb *)skb_push(skb, sizeof(*tsb));
782 /* Zero-out TSB by default */
783 memset(tsb, 0, sizeof(*tsb));
785 if (skb->ip_summed == CHECKSUM_PARTIAL) {
786 ip_ver = htons(skb->protocol);
789 ip_proto = ip_hdr(skb)->protocol;
792 ip_proto = ipv6_hdr(skb)->nexthdr;
798 /* Get the checksum offset and the L4 (transport) offset */
799 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
800 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
801 csum_info |= (csum_start << L4_PTR_SHIFT);
803 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
804 csum_info |= L4_LENGTH_VALID;
805 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
810 tsb->l4_ptr_dest_map = csum_info;
816 static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
817 struct net_device *dev)
819 struct bcm_sysport_priv *priv = netdev_priv(dev);
820 struct device *kdev = &priv->pdev->dev;
821 struct bcm_sysport_tx_ring *ring;
822 struct bcm_sysport_cb *cb;
823 struct netdev_queue *txq;
824 struct dma_desc *desc;
825 unsigned int skb_len;
832 queue = skb_get_queue_mapping(skb);
833 txq = netdev_get_tx_queue(dev, queue);
834 ring = &priv->tx_rings[queue];
836 /* lock against tx reclaim in BH context and TX ring full interrupt */
837 spin_lock_irqsave(&ring->lock, flags);
838 if (unlikely(ring->desc_count == 0)) {
839 netif_tx_stop_queue(txq);
840 netdev_err(dev, "queue %d awake and ring full!\n", queue);
841 ret = NETDEV_TX_BUSY;
845 /* Insert TSB and checksum infos */
847 ret = bcm_sysport_insert_tsb(skb, dev);
854 /* The Ethernet switch we are interfaced with needs packets to be at
855 * least 64 bytes (including FCS) otherwise they will be discarded when
856 * they enter the switch port logic. When Broadcom tags are enabled, we
857 * need to make sure that packets are at least 68 bytes
858 * (including FCS and tag) because the length verification is done after
859 * the Broadcom tag is stripped off the ingress packet.
861 if (skb_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
866 skb_len = skb->len < ETH_ZLEN + ENET_BRCM_TAG_LEN ?
867 ETH_ZLEN + ENET_BRCM_TAG_LEN : skb->len;
869 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
870 if (dma_mapping_error(kdev, mapping)) {
871 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
877 /* Remember the SKB for future freeing */
878 cb = &ring->cbs[ring->curr_desc];
880 dma_unmap_addr_set(cb, dma_addr, mapping);
881 dma_unmap_len_set(cb, dma_len, skb_len);
883 /* Fetch a descriptor entry from our pool */
884 desc = ring->desc_cpu;
886 desc->addr_lo = lower_32_bits(mapping);
887 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
888 len_status |= (skb_len << DESC_LEN_SHIFT);
889 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
891 if (skb->ip_summed == CHECKSUM_PARTIAL)
892 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
895 if (ring->curr_desc == ring->size)
899 /* Ensure write completion of the descriptor status/length
900 * in DRAM before the System Port WRITE_PORT register latches
904 desc->addr_status_len = len_status;
907 /* Write this descriptor address to the RING write port */
908 tdma_port_write_desc_addr(priv, desc, ring->index);
910 /* Check ring space and update SW control flow */
911 if (ring->desc_count == 0)
912 netif_tx_stop_queue(txq);
914 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
915 ring->index, ring->desc_count, ring->curr_desc);
919 spin_unlock_irqrestore(&ring->lock, flags);
923 static void bcm_sysport_tx_timeout(struct net_device *dev)
925 netdev_warn(dev, "transmit timeout!\n");
927 dev->trans_start = jiffies;
928 dev->stats.tx_errors++;
930 netif_tx_wake_all_queues(dev);
933 /* phylib adjust link callback */
934 static void bcm_sysport_adj_link(struct net_device *dev)
936 struct bcm_sysport_priv *priv = netdev_priv(dev);
937 struct phy_device *phydev = priv->phydev;
938 unsigned int changed = 0;
939 u32 cmd_bits = 0, reg;
941 if (priv->old_link != phydev->link) {
943 priv->old_link = phydev->link;
946 if (priv->old_duplex != phydev->duplex) {
948 priv->old_duplex = phydev->duplex;
951 switch (phydev->speed) {
953 cmd_bits = CMD_SPEED_2500;
956 cmd_bits = CMD_SPEED_1000;
959 cmd_bits = CMD_SPEED_100;
962 cmd_bits = CMD_SPEED_10;
967 cmd_bits <<= CMD_SPEED_SHIFT;
969 if (phydev->duplex == DUPLEX_HALF)
970 cmd_bits |= CMD_HD_EN;
972 if (priv->old_pause != phydev->pause) {
974 priv->old_pause = phydev->pause;
978 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
981 reg = umac_readl(priv, UMAC_CMD);
982 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
983 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
984 CMD_TX_PAUSE_IGNORE);
986 umac_writel(priv, reg, UMAC_CMD);
988 phy_print_status(priv->phydev);
992 static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
995 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
996 struct device *kdev = &priv->pdev->dev;
1001 /* Simple descriptors partitioning for now */
1004 /* We just need one DMA descriptor which is DMA-able, since writing to
1005 * the port will allocate a new descriptor in its internal linked-list
1007 p = dma_zalloc_coherent(kdev, 1, &ring->desc_dma, GFP_KERNEL);
1009 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1013 ring->cbs = kzalloc(sizeof(struct bcm_sysport_cb) * size, GFP_KERNEL);
1015 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1019 /* Initialize SW view of the ring */
1020 spin_lock_init(&ring->lock);
1022 netif_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1023 ring->index = index;
1025 ring->alloc_size = ring->size;
1027 ring->desc_count = ring->size;
1028 ring->curr_desc = 0;
1030 /* Initialize HW ring */
1031 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1032 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1033 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1034 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1035 tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
1036 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1038 /* Program the number of descriptors as MAX_THRESHOLD and half of
1039 * its size for the hysteresis trigger
1041 tdma_writel(priv, ring->size |
1042 1 << RING_HYST_THRESH_SHIFT,
1043 TDMA_DESC_RING_MAX_HYST(index));
1045 /* Enable the ring queue in the arbiter */
1046 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1047 reg |= (1 << index);
1048 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1050 napi_enable(&ring->napi);
1052 netif_dbg(priv, hw, priv->netdev,
1053 "TDMA cfg, size=%d, desc_cpu=%p\n",
1054 ring->size, ring->desc_cpu);
1059 static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
1062 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1063 struct device *kdev = &priv->pdev->dev;
1066 /* Caller should stop the TDMA engine */
1067 reg = tdma_readl(priv, TDMA_STATUS);
1068 if (!(reg & TDMA_DISABLED))
1069 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1071 napi_disable(&ring->napi);
1072 netif_napi_del(&ring->napi);
1074 bcm_sysport_tx_reclaim(priv, ring);
1079 if (ring->desc_dma) {
1080 dma_free_coherent(kdev, 1, ring->desc_cpu, ring->desc_dma);
1084 ring->alloc_size = 0;
1086 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1090 static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
1091 unsigned int enable)
1093 unsigned int timeout = 1000;
1096 reg = rdma_readl(priv, RDMA_CONTROL);
1101 rdma_writel(priv, reg, RDMA_CONTROL);
1103 /* Poll for RMDA disabling completion */
1105 reg = rdma_readl(priv, RDMA_STATUS);
1106 if (!!(reg & RDMA_DISABLED) == !enable)
1108 usleep_range(1000, 2000);
1109 } while (timeout-- > 0);
1111 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1117 static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
1118 unsigned int enable)
1120 unsigned int timeout = 1000;
1123 reg = tdma_readl(priv, TDMA_CONTROL);
1128 tdma_writel(priv, reg, TDMA_CONTROL);
1130 /* Poll for TMDA disabling completion */
1132 reg = tdma_readl(priv, TDMA_STATUS);
1133 if (!!(reg & TDMA_DISABLED) == !enable)
1136 usleep_range(1000, 2000);
1137 } while (timeout-- > 0);
1139 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1144 static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1149 /* Initialize SW view of the RX ring */
1150 priv->num_rx_bds = NUM_RX_DESC;
1151 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
1152 priv->rx_bd_assign_ptr = priv->rx_bds;
1153 priv->rx_bd_assign_index = 0;
1154 priv->rx_c_index = 0;
1155 priv->rx_read_ptr = 0;
1156 priv->rx_cbs = kzalloc(priv->num_rx_bds *
1157 sizeof(struct bcm_sysport_cb), GFP_KERNEL);
1158 if (!priv->rx_cbs) {
1159 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1163 ret = bcm_sysport_alloc_rx_bufs(priv);
1165 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1169 /* Initialize HW, ensure RDMA is disabled */
1170 reg = rdma_readl(priv, RDMA_STATUS);
1171 if (!(reg & RDMA_DISABLED))
1172 rdma_enable_set(priv, 0);
1174 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1175 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1176 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1177 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1178 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1179 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1180 /* Operate the queue in ring mode */
1181 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1182 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1183 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1184 rdma_writel(priv, NUM_HW_RX_DESC_WORDS - 1, RDMA_END_ADDR_LO);
1186 rdma_writel(priv, 1, RDMA_MBDONE_INTR);
1188 netif_dbg(priv, hw, priv->netdev,
1189 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1190 priv->num_rx_bds, priv->rx_bds);
1195 static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1197 struct bcm_sysport_cb *cb;
1201 /* Caller should ensure RDMA is disabled */
1202 reg = rdma_readl(priv, RDMA_STATUS);
1203 if (!(reg & RDMA_DISABLED))
1204 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1206 for (i = 0; i < priv->num_rx_bds; i++) {
1207 cb = &priv->rx_cbs[i];
1208 if (dma_unmap_addr(cb, dma_addr))
1209 dma_unmap_single(&priv->pdev->dev,
1210 dma_unmap_addr(cb, dma_addr),
1211 RX_BUF_LENGTH, DMA_FROM_DEVICE);
1212 bcm_sysport_free_cb(cb);
1215 kfree(priv->rx_cbs);
1216 priv->rx_cbs = NULL;
1218 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1221 static void bcm_sysport_set_rx_mode(struct net_device *dev)
1223 struct bcm_sysport_priv *priv = netdev_priv(dev);
1226 reg = umac_readl(priv, UMAC_CMD);
1227 if (dev->flags & IFF_PROMISC)
1230 reg &= ~CMD_PROMISC;
1231 umac_writel(priv, reg, UMAC_CMD);
1233 /* No support for ALLMULTI */
1234 if (dev->flags & IFF_ALLMULTI)
1238 static inline void umac_enable_set(struct bcm_sysport_priv *priv,
1239 unsigned int enable)
1243 reg = umac_readl(priv, UMAC_CMD);
1245 reg |= CMD_RX_EN | CMD_TX_EN;
1247 reg &= ~(CMD_RX_EN | CMD_TX_EN);
1248 umac_writel(priv, reg, UMAC_CMD);
1250 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1251 * to be processed (1 msec).
1254 usleep_range(1000, 2000);
1257 static inline void umac_reset(struct bcm_sysport_priv *priv)
1261 reg = umac_readl(priv, UMAC_CMD);
1262 reg |= CMD_SW_RESET;
1263 umac_writel(priv, reg, UMAC_CMD);
1265 reg = umac_readl(priv, UMAC_CMD);
1266 reg &= ~CMD_SW_RESET;
1267 umac_writel(priv, reg, UMAC_CMD);
1270 static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
1271 unsigned char *addr)
1273 umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) |
1274 (addr[2] << 8) | addr[3], UMAC_MAC0);
1275 umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1);
1278 static void topctrl_flush(struct bcm_sysport_priv *priv)
1280 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1281 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1283 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1284 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1287 static int bcm_sysport_open(struct net_device *dev)
1289 struct bcm_sysport_priv *priv = netdev_priv(dev);
1297 /* Flush TX and RX FIFOs at TOPCTRL level */
1298 topctrl_flush(priv);
1300 /* Disable the UniMAC RX/TX */
1301 umac_enable_set(priv, 0);
1303 /* Enable RBUF 2bytes alignment and Receive Status Block */
1304 reg = rbuf_readl(priv, RBUF_CONTROL);
1305 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1306 rbuf_writel(priv, reg, RBUF_CONTROL);
1308 /* Set maximum frame length */
1309 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1311 /* Set MAC address */
1312 umac_set_hw_addr(priv, dev->dev_addr);
1314 /* Read CRC forward */
1315 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
1317 priv->phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1318 0, priv->phy_interface);
1319 if (!priv->phydev) {
1320 netdev_err(dev, "could not attach to PHY\n");
1324 /* Reset house keeping link status */
1325 priv->old_duplex = -1;
1326 priv->old_link = -1;
1327 priv->old_pause = -1;
1329 /* mask all interrupts and request them */
1330 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
1331 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1332 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1333 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
1334 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1335 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1337 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1339 netdev_err(dev, "failed to request RX interrupt\n");
1340 goto out_phy_disconnect;
1343 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, dev->name, dev);
1345 netdev_err(dev, "failed to request TX interrupt\n");
1349 /* Initialize both hardware and software ring */
1350 for (i = 0; i < dev->num_tx_queues; i++) {
1351 ret = bcm_sysport_init_tx_ring(priv, i);
1353 netdev_err(dev, "failed to initialize TX ring %d\n",
1355 goto out_free_tx_ring;
1359 /* Initialize linked-list */
1360 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1362 /* Initialize RX ring */
1363 ret = bcm_sysport_init_rx_ring(priv);
1365 netdev_err(dev, "failed to initialize RX ring\n");
1366 goto out_free_rx_ring;
1370 ret = rdma_enable_set(priv, 1);
1372 goto out_free_rx_ring;
1374 /* Enable RX interrupt and TX ring full interrupt */
1375 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1378 ret = tdma_enable_set(priv, 1);
1380 goto out_clear_rx_int;
1383 napi_enable(&priv->napi);
1385 /* Turn on UniMAC TX/RX */
1386 umac_enable_set(priv, 1);
1388 phy_start(priv->phydev);
1390 /* Enable TX interrupts for the 32 TXQs */
1391 intrl2_1_mask_clear(priv, 0xffffffff);
1393 /* Last call before we start the real business */
1394 netif_tx_start_all_queues(dev);
1399 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1401 bcm_sysport_fini_rx_ring(priv);
1403 for (i = 0; i < dev->num_tx_queues; i++)
1404 bcm_sysport_fini_tx_ring(priv, i);
1405 free_irq(priv->irq1, dev);
1407 free_irq(priv->irq0, dev);
1409 phy_disconnect(priv->phydev);
1413 static int bcm_sysport_stop(struct net_device *dev)
1415 struct bcm_sysport_priv *priv = netdev_priv(dev);
1420 /* stop all software from updating hardware */
1421 netif_tx_stop_all_queues(dev);
1422 napi_disable(&priv->napi);
1423 phy_stop(priv->phydev);
1425 /* mask all interrupts */
1426 intrl2_0_mask_set(priv, 0xffffffff);
1427 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1428 intrl2_1_mask_set(priv, 0xffffffff);
1429 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1431 /* Disable UniMAC RX */
1432 reg = umac_readl(priv, UMAC_CMD);
1434 umac_writel(priv, reg, UMAC_CMD);
1436 ret = tdma_enable_set(priv, 0);
1438 netdev_err(dev, "timeout disabling RDMA\n");
1442 /* Wait for a maximum packet size to be drained */
1443 usleep_range(2000, 3000);
1445 ret = rdma_enable_set(priv, 0);
1447 netdev_err(dev, "timeout disabling TDMA\n");
1451 /* Disable UniMAC TX */
1452 reg = umac_readl(priv, UMAC_CMD);
1454 umac_writel(priv, reg, UMAC_CMD);
1456 /* Free RX/TX rings SW structures */
1457 for (i = 0; i < dev->num_tx_queues; i++)
1458 bcm_sysport_fini_tx_ring(priv, i);
1459 bcm_sysport_fini_rx_ring(priv);
1461 free_irq(priv->irq0, dev);
1462 free_irq(priv->irq1, dev);
1464 /* Disconnect from PHY */
1465 phy_disconnect(priv->phydev);
1470 static struct ethtool_ops bcm_sysport_ethtool_ops = {
1471 .get_settings = bcm_sysport_get_settings,
1472 .set_settings = bcm_sysport_set_settings,
1473 .get_drvinfo = bcm_sysport_get_drvinfo,
1474 .get_msglevel = bcm_sysport_get_msglvl,
1475 .set_msglevel = bcm_sysport_set_msglvl,
1476 .get_link = ethtool_op_get_link,
1477 .get_strings = bcm_sysport_get_strings,
1478 .get_ethtool_stats = bcm_sysport_get_stats,
1479 .get_sset_count = bcm_sysport_get_sset_count,
1482 static const struct net_device_ops bcm_sysport_netdev_ops = {
1483 .ndo_start_xmit = bcm_sysport_xmit,
1484 .ndo_tx_timeout = bcm_sysport_tx_timeout,
1485 .ndo_open = bcm_sysport_open,
1486 .ndo_stop = bcm_sysport_stop,
1487 .ndo_set_features = bcm_sysport_set_features,
1488 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
1491 #define REV_FMT "v%2x.%02x"
1493 static int bcm_sysport_probe(struct platform_device *pdev)
1495 struct bcm_sysport_priv *priv;
1496 struct device_node *dn;
1497 struct net_device *dev;
1498 const void *macaddr;
1503 dn = pdev->dev.of_node;
1504 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1506 /* Read the Transmit/Receive Queue properties */
1507 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
1508 txq = TDMA_NUM_RINGS;
1509 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
1512 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
1516 /* Initialize private members */
1517 priv = netdev_priv(dev);
1519 priv->irq0 = platform_get_irq(pdev, 0);
1520 priv->irq1 = platform_get_irq(pdev, 1);
1521 if (priv->irq0 <= 0 || priv->irq1 <= 0) {
1522 dev_err(&pdev->dev, "invalid interrupts\n");
1527 priv->base = devm_ioremap_resource(&pdev->dev, r);
1528 if (IS_ERR(priv->base)) {
1529 ret = PTR_ERR(priv->base);
1536 priv->phy_interface = of_get_phy_mode(dn);
1537 /* Default to GMII interface mode */
1538 if (priv->phy_interface < 0)
1539 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
1541 /* In the case of a fixed PHY, the DT node associated
1542 * to the PHY is the Ethernet MAC DT node.
1544 if (of_phy_is_fixed_link(dn)) {
1545 ret = of_phy_register_fixed_link(dn);
1547 dev_err(&pdev->dev, "failed to register fixed PHY\n");
1554 /* Initialize netdevice members */
1555 macaddr = of_get_mac_address(dn);
1556 if (!macaddr || !is_valid_ether_addr(macaddr)) {
1557 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
1558 random_ether_addr(dev->dev_addr);
1560 ether_addr_copy(dev->dev_addr, macaddr);
1563 SET_NETDEV_DEV(dev, &pdev->dev);
1564 dev_set_drvdata(&pdev->dev, dev);
1565 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
1566 dev->netdev_ops = &bcm_sysport_netdev_ops;
1567 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
1569 /* HW supported features, none enabled by default */
1570 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
1571 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1573 /* Set the needed headroom once and for all */
1574 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
1575 dev->needed_headroom += sizeof(struct bcm_tsb);
1577 /* libphy will adjust the link state accordingly */
1578 netif_carrier_off(dev);
1580 ret = register_netdev(dev);
1582 dev_err(&pdev->dev, "failed to register net_device\n");
1586 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
1587 dev_info(&pdev->dev,
1588 "Broadcom SYSTEMPORT" REV_FMT
1589 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
1590 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
1591 priv->base, priv->irq0, priv->irq1, txq, rxq);
1599 static int bcm_sysport_remove(struct platform_device *pdev)
1601 struct net_device *dev = dev_get_drvdata(&pdev->dev);
1603 /* Not much to do, ndo_close has been called
1604 * and we use managed allocations
1606 unregister_netdev(dev);
1608 dev_set_drvdata(&pdev->dev, NULL);
1613 static const struct of_device_id bcm_sysport_of_match[] = {
1614 { .compatible = "brcm,systemport-v1.00" },
1615 { .compatible = "brcm,systemport" },
1619 static struct platform_driver bcm_sysport_driver = {
1620 .probe = bcm_sysport_probe,
1621 .remove = bcm_sysport_remove,
1623 .name = "brcm-systemport",
1624 .owner = THIS_MODULE,
1625 .of_match_table = bcm_sysport_of_match,
1628 module_platform_driver(bcm_sysport_driver);
1630 MODULE_AUTHOR("Broadcom Corporation");
1631 MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
1632 MODULE_ALIAS("platform:brcm-systemport");
1633 MODULE_LICENSE("GPL");