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Merge tag 'staging-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[deliverable/linux.git] / drivers / net / ethernet / broadcom / bcmsysport.c
CommitLineData
80105bef
FF		 1/*
2 * Broadcom BCM7xxx System Port Ethernet MAC driver
3 *
4 * Copyright (C) 2014 Broadcom Corporation
5 *
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.
9 */
10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
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>
20#include <linux/of.h>
21#include <linux/of_net.h>
22#include <linux/of_mdio.h>
23#include <linux/phy.h>
24#include <linux/phy_fixed.h>
25#include <net/ip.h>
26#include <net/ipv6.h>
27
28#include "bcmsysport.h"
29
30/* I/O accessors register helpers */
31#define BCM_SYSPORT_IO_MACRO(name, offset) \
32static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \
33{ \
34 u32 reg = __raw_readl(priv->base + offset + off); \
35 return reg; \
36} \
37static inline void name##_writel(struct bcm_sysport_priv *priv, \
38 u32 val, u32 off) \
39{ \
40 __raw_writel(val, priv->base + offset + off); \
41} \
42
43BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET);
44BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET);
45BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET);
46BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET);
47BCM_SYSPORT_IO_MACRO(rdma, SYS_PORT_RDMA_OFFSET);
48BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET);
49BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET);
50BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET);
51BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET);
52BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET);
53
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.
56 */
57#define BCM_SYSPORT_INTR_L2(which) \
58static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \
59 u32 mask) \
60{ \
61 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
62 priv->irq##which##_mask &= ~(mask); \
63} \
64static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \
65 u32 mask) \
66{ \
67 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
68 priv->irq##which##_mask |= (mask); \
69} \
70
71BCM_SYSPORT_INTR_L2(0)
72BCM_SYSPORT_INTR_L2(1)
73
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.
77 */
78static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv,
79 void __iomem *d,
80 dma_addr_t addr)
81{
82#ifdef CONFIG_PHYS_ADDR_T_64BIT
83 __raw_writel(upper_32_bits(addr) & DESC_ADDR_HI_MASK,
23acb2fc 84 d + DESC_ADDR_HI_STATUS_LEN);
80105bef
FF		 85#endif
86 __raw_writel(lower_32_bits(addr), d + DESC_ADDR_LO);
87}
88
89static inline void tdma_port_write_desc_addr(struct bcm_sysport_priv *priv,
23acb2fc
FF		 90 struct dma_desc *desc,
91 unsigned int port)
80105bef
FF		 92{
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));
96}
97
98/* Ethtool operations */
99static int bcm_sysport_set_settings(struct net_device *dev,
100 struct ethtool_cmd *cmd)
101{
102 struct bcm_sysport_priv *priv = netdev_priv(dev);
103
104 if (!netif_running(dev))
105 return -EINVAL;
106
107 return phy_ethtool_sset(priv->phydev, cmd);
108}
109
110static int bcm_sysport_get_settings(struct net_device *dev,
23acb2fc 111 struct ethtool_cmd *cmd)
80105bef
FF		 112{
113 struct bcm_sysport_priv *priv = netdev_priv(dev);
114
115 if (!netif_running(dev))
116 return -EINVAL;
117
118 return phy_ethtool_gset(priv->phydev, cmd);
119}
120
121static int bcm_sysport_set_rx_csum(struct net_device *dev,
23acb2fc 122 netdev_features_t wanted)
80105bef
FF		 123{
124 struct bcm_sysport_priv *priv = netdev_priv(dev);
125 u32 reg;
126
9d34c1cb 127 priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
80105bef 128 reg = rxchk_readl(priv, RXCHK_CONTROL);
9d34c1cb 129 if (priv->rx_chk_en)
80105bef
FF		 130 reg |= RXCHK_EN;
131 else
132 reg &= ~RXCHK_EN;
133
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
136 */
9d34c1cb 137 if (priv->rx_chk_en && priv->crc_fwd)
80105bef
FF		 138 reg |= RXCHK_SKIP_FCS;
139 else
140 reg &= ~RXCHK_SKIP_FCS;
141
d09d3038
FF		 142 /* If Broadcom tags are enabled (e.g: using a switch), make
143 * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom
144 * tag after the Ethernet MAC Source Address.
145 */
146 if (netdev_uses_dsa(dev))
147 reg |= RXCHK_BRCM_TAG_EN;
148 else
149 reg &= ~RXCHK_BRCM_TAG_EN;
150
80105bef
FF		 151 rxchk_writel(priv, reg, RXCHK_CONTROL);
152
153 return 0;
154}
155
156static int bcm_sysport_set_tx_csum(struct net_device *dev,
23acb2fc 157 netdev_features_t wanted)
80105bef
FF		 158{
159 struct bcm_sysport_priv *priv = netdev_priv(dev);
160 u32 reg;
161
162 /* Hardware transmit checksum requires us to enable the Transmit status
163 * block prepended to the packet contents
164 */
165 priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
166 reg = tdma_readl(priv, TDMA_CONTROL);
167 if (priv->tsb_en)
168 reg |= TSB_EN;
169 else
170 reg &= ~TSB_EN;
171 tdma_writel(priv, reg, TDMA_CONTROL);
172
173 return 0;
174}
175
176static int bcm_sysport_set_features(struct net_device *dev,
23acb2fc 177 netdev_features_t features)
80105bef
FF		 178{
179 netdev_features_t changed = features ^ dev->features;
180 netdev_features_t wanted = dev->wanted_features;
181 int ret = 0;
182
183 if (changed & NETIF_F_RXCSUM)
184 ret = bcm_sysport_set_rx_csum(dev, wanted);
185 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
186 ret = bcm_sysport_set_tx_csum(dev, wanted);
187
188 return ret;
189}
190
191/* Hardware counters must be kept in sync because the order/offset
192 * is important here (order in structure declaration = order in hardware)
193 */
194static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = {
195 /* general stats */
196 STAT_NETDEV(rx_packets),
197 STAT_NETDEV(tx_packets),
198 STAT_NETDEV(rx_bytes),
199 STAT_NETDEV(tx_bytes),
200 STAT_NETDEV(rx_errors),
201 STAT_NETDEV(tx_errors),
202 STAT_NETDEV(rx_dropped),
203 STAT_NETDEV(tx_dropped),
204 STAT_NETDEV(multicast),
205 /* UniMAC RSV counters */
206 STAT_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
207 STAT_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
208 STAT_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
209 STAT_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
210 STAT_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
211 STAT_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
212 STAT_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
213 STAT_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
214 STAT_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
215 STAT_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
216 STAT_MIB_RX("rx_pkts", mib.rx.pkt),
217 STAT_MIB_RX("rx_bytes", mib.rx.bytes),
218 STAT_MIB_RX("rx_multicast", mib.rx.mca),
219 STAT_MIB_RX("rx_broadcast", mib.rx.bca),
220 STAT_MIB_RX("rx_fcs", mib.rx.fcs),
221 STAT_MIB_RX("rx_control", mib.rx.cf),
222 STAT_MIB_RX("rx_pause", mib.rx.pf),
223 STAT_MIB_RX("rx_unknown", mib.rx.uo),
224 STAT_MIB_RX("rx_align", mib.rx.aln),
225 STAT_MIB_RX("rx_outrange", mib.rx.flr),
226 STAT_MIB_RX("rx_code", mib.rx.cde),
227 STAT_MIB_RX("rx_carrier", mib.rx.fcr),
228 STAT_MIB_RX("rx_oversize", mib.rx.ovr),
229 STAT_MIB_RX("rx_jabber", mib.rx.jbr),
230 STAT_MIB_RX("rx_mtu_err", mib.rx.mtue),
231 STAT_MIB_RX("rx_good_pkts", mib.rx.pok),
232 STAT_MIB_RX("rx_unicast", mib.rx.uc),
233 STAT_MIB_RX("rx_ppp", mib.rx.ppp),
234 STAT_MIB_RX("rx_crc", mib.rx.rcrc),
235 /* UniMAC TSV counters */
236 STAT_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
237 STAT_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
238 STAT_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
239 STAT_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
240 STAT_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
241 STAT_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
242 STAT_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
243 STAT_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
244 STAT_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
245 STAT_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
246 STAT_MIB_TX("tx_pkts", mib.tx.pkts),
247 STAT_MIB_TX("tx_multicast", mib.tx.mca),
248 STAT_MIB_TX("tx_broadcast", mib.tx.bca),
249 STAT_MIB_TX("tx_pause", mib.tx.pf),
250 STAT_MIB_TX("tx_control", mib.tx.cf),
251 STAT_MIB_TX("tx_fcs_err", mib.tx.fcs),
252 STAT_MIB_TX("tx_oversize", mib.tx.ovr),
253 STAT_MIB_TX("tx_defer", mib.tx.drf),
254 STAT_MIB_TX("tx_excess_defer", mib.tx.edf),
255 STAT_MIB_TX("tx_single_col", mib.tx.scl),
256 STAT_MIB_TX("tx_multi_col", mib.tx.mcl),
257 STAT_MIB_TX("tx_late_col", mib.tx.lcl),
258 STAT_MIB_TX("tx_excess_col", mib.tx.ecl),
259 STAT_MIB_TX("tx_frags", mib.tx.frg),
260 STAT_MIB_TX("tx_total_col", mib.tx.ncl),
261 STAT_MIB_TX("tx_jabber", mib.tx.jbr),
262 STAT_MIB_TX("tx_bytes", mib.tx.bytes),
263 STAT_MIB_TX("tx_good_pkts", mib.tx.pok),
264 STAT_MIB_TX("tx_unicast", mib.tx.uc),
265 /* UniMAC RUNT counters */
266 STAT_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
267 STAT_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
268 STAT_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
269 STAT_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
270 /* RXCHK misc statistics */
271 STAT_RXCHK("rxchk_bad_csum", mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR),
272 STAT_RXCHK("rxchk_other_pkt_disc", mib.rxchk_other_pkt_disc,
23acb2fc 273 RXCHK_OTHER_DISC_CNTR),
80105bef
FF		 274 /* RBUF misc statistics */
275 STAT_RBUF("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR),
276 STAT_RBUF("rbuf_err_cnt", mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR),
55ff4ea9
FF		 277 STAT_MIB_SOFT("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
278 STAT_MIB_SOFT("rx_dma_failed", mib.rx_dma_failed),
279 STAT_MIB_SOFT("tx_dma_failed", mib.tx_dma_failed),
80105bef
FF		 280};
281
282#define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats)
283
284static void bcm_sysport_get_drvinfo(struct net_device *dev,
23acb2fc 285 struct ethtool_drvinfo *info)
80105bef
FF		 286{
287 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
288 strlcpy(info->version, "0.1", sizeof(info->version));
289 strlcpy(info->bus_info, "platform", sizeof(info->bus_info));
290 info->n_stats = BCM_SYSPORT_STATS_LEN;
291}
292
293static u32 bcm_sysport_get_msglvl(struct net_device *dev)
294{
295 struct bcm_sysport_priv *priv = netdev_priv(dev);
296
297 return priv->msg_enable;
298}
299
300static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable)
301{
302 struct bcm_sysport_priv *priv = netdev_priv(dev);
303
304 priv->msg_enable = enable;
305}
306
307static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set)
308{
309 switch (string_set) {
310 case ETH_SS_STATS:
311 return BCM_SYSPORT_STATS_LEN;
312 default:
313 return -EOPNOTSUPP;
314 }
315}
316
317static void bcm_sysport_get_strings(struct net_device *dev,
23acb2fc 318 u32 stringset, u8 *data)
80105bef
FF		 319{
320 int i;
321
322 switch (stringset) {
323 case ETH_SS_STATS:
324 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
325 memcpy(data + i * ETH_GSTRING_LEN,
23acb2fc
FF		 326 bcm_sysport_gstrings_stats[i].stat_string,
327 ETH_GSTRING_LEN);
80105bef
FF		 328 }
329 break;
330 default:
331 break;
332 }
333}
334
335static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv)
336{
337 int i, j = 0;
338
339 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
340 const struct bcm_sysport_stats *s;
341 u8 offset = 0;
342 u32 val = 0;
343 char *p;
344
345 s = &bcm_sysport_gstrings_stats[i];
346 switch (s->type) {
347 case BCM_SYSPORT_STAT_NETDEV:
55ff4ea9 348 case BCM_SYSPORT_STAT_SOFT:
80105bef
FF		 349 continue;
350 case BCM_SYSPORT_STAT_MIB_RX:
351 case BCM_SYSPORT_STAT_MIB_TX:
352 case BCM_SYSPORT_STAT_RUNT:
353 if (s->type != BCM_SYSPORT_STAT_MIB_RX)
354 offset = UMAC_MIB_STAT_OFFSET;
355 val = umac_readl(priv, UMAC_MIB_START + j + offset);
356 break;
357 case BCM_SYSPORT_STAT_RXCHK:
358 val = rxchk_readl(priv, s->reg_offset);
359 if (val == ~0)
360 rxchk_writel(priv, 0, s->reg_offset);
361 break;
362 case BCM_SYSPORT_STAT_RBUF:
363 val = rbuf_readl(priv, s->reg_offset);
364 if (val == ~0)
365 rbuf_writel(priv, 0, s->reg_offset);
366 break;
367 }
368
369 j += s->stat_sizeof;
370 p = (char *)priv + s->stat_offset;
371 *(u32 *)p = val;
372 }
373
374 netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n");
375}
376
377static void bcm_sysport_get_stats(struct net_device *dev,
23acb2fc 378 struct ethtool_stats *stats, u64 *data)
80105bef
FF		 379{
380 struct bcm_sysport_priv *priv = netdev_priv(dev);
381 int i;
382
383 if (netif_running(dev))
384 bcm_sysport_update_mib_counters(priv);
385
386 for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) {
387 const struct bcm_sysport_stats *s;
388 char *p;
389
390 s = &bcm_sysport_gstrings_stats[i];
391 if (s->type == BCM_SYSPORT_STAT_NETDEV)
392 p = (char *)&dev->stats;
393 else
394 p = (char *)priv;
395 p += s->stat_offset;
396 data[i] = *(u32 *)p;
397 }
398}
399
83e82f4c
FF		 400static void bcm_sysport_get_wol(struct net_device *dev,
401 struct ethtool_wolinfo *wol)
402{
403 struct bcm_sysport_priv *priv = netdev_priv(dev);
404 u32 reg;
405
406 wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
407 wol->wolopts = priv->wolopts;
408
409 if (!(priv->wolopts & WAKE_MAGICSECURE))
410 return;
411
412 /* Return the programmed SecureOn password */
413 reg = umac_readl(priv, UMAC_PSW_MS);
414 put_unaligned_be16(reg, &wol->sopass[0]);
415 reg = umac_readl(priv, UMAC_PSW_LS);
416 put_unaligned_be32(reg, &wol->sopass[2]);
417}
418
419static int bcm_sysport_set_wol(struct net_device *dev,
23acb2fc 420 struct ethtool_wolinfo *wol)
83e82f4c
FF		 421{
422 struct bcm_sysport_priv *priv = netdev_priv(dev);
423 struct device *kdev = &priv->pdev->dev;
424 u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE;
425
426 if (!device_can_wakeup(kdev))
427 return -ENOTSUPP;
428
429 if (wol->wolopts & ~supported)
430 return -EINVAL;
431
432 /* Program the SecureOn password */
433 if (wol->wolopts & WAKE_MAGICSECURE) {
434 umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
23acb2fc 435 UMAC_PSW_MS);
83e82f4c 436 umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
23acb2fc 437 UMAC_PSW_LS);
83e82f4c
FF		 438 }
439
440 /* Flag the device and relevant IRQ as wakeup capable */
441 if (wol->wolopts) {
442 device_set_wakeup_enable(kdev, 1);
61b423a8
FF		 443 if (priv->wol_irq_disabled)
444 enable_irq_wake(priv->wol_irq);
83e82f4c
FF		 445 priv->wol_irq_disabled = 0;
446 } else {
447 device_set_wakeup_enable(kdev, 0);
448 /* Avoid unbalanced disable_irq_wake calls */
449 if (!priv->wol_irq_disabled)
450 disable_irq_wake(priv->wol_irq);
451 priv->wol_irq_disabled = 1;
452 }
453
454 priv->wolopts = wol->wolopts;
455
456 return 0;
457}
458
b1a15e86
FF		 459static int bcm_sysport_get_coalesce(struct net_device *dev,
460 struct ethtool_coalesce *ec)
461{
462 struct bcm_sysport_priv *priv = netdev_priv(dev);
463 u32 reg;
464
465 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0));
466
467 ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000;
468 ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK;
469
d0634868
FF		 470 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
471
472 ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000;
473 ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK;
474
b1a15e86
FF		 475 return 0;
476}
477
478static int bcm_sysport_set_coalesce(struct net_device *dev,
479 struct ethtool_coalesce *ec)
480{
481 struct bcm_sysport_priv *priv = netdev_priv(dev);
482 unsigned int i;
483 u32 reg;
484
d0634868
FF		 485 /* Base system clock is 125Mhz, DMA timeout is this reference clock
486 * divided by 1024, which yield roughly 8.192 us, our maximum value has
487 * to fit in the RING_TIMEOUT_MASK (16 bits).
b1a15e86
FF		 488 */
489 if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK ||
d0634868
FF		 490 ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 ||
491 ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK ||
492 ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1)
b1a15e86
FF		 493 return -EINVAL;
494
d0634868
FF		 495 if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) ||
496 (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0))
b1a15e86
FF		 497 return -EINVAL;
498
499 for (i = 0; i < dev->num_tx_queues; i++) {
500 reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(i));
501 reg &= ~(RING_INTR_THRESH_MASK |
502 RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT);
503 reg |= ec->tx_max_coalesced_frames;
504 reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) <<
505 RING_TIMEOUT_SHIFT;
506 tdma_writel(priv, reg, TDMA_DESC_RING_INTR_CONTROL(i));
507 }
508
d0634868
FF		 509 reg = rdma_readl(priv, RDMA_MBDONE_INTR);
510 reg &= ~(RDMA_INTR_THRESH_MASK |
511 RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT);
512 reg |= ec->rx_max_coalesced_frames;
513 reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192) <<
514 RDMA_TIMEOUT_SHIFT;
515 rdma_writel(priv, reg, RDMA_MBDONE_INTR);
516
b1a15e86
FF		 517 return 0;
518}
519
80105bef
FF		 520static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb)
521{
522 dev_kfree_skb_any(cb->skb);
523 cb->skb = NULL;
524 dma_unmap_addr_set(cb, dma_addr, 0);
525}
526
c73b0183
FF		 527static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv,
528 struct bcm_sysport_cb *cb)
80105bef
FF		 529{
530 struct device *kdev = &priv->pdev->dev;
531 struct net_device *ndev = priv->netdev;
c73b0183 532 struct sk_buff *skb, *rx_skb;
80105bef 533 dma_addr_t mapping;
80105bef 534
c73b0183
FF		 535 /* Allocate a new SKB for a new packet */
536 skb = netdev_alloc_skb(priv->netdev, RX_BUF_LENGTH);
537 if (!skb) {
538 priv->mib.alloc_rx_buff_failed++;
80105bef 539 netif_err(priv, rx_err, ndev, "SKB alloc failed\n");
c73b0183 540 return NULL;
80105bef
FF		 541 }
542
c73b0183 543 mapping = dma_map_single(kdev, skb->data,
23acb2fc 544 RX_BUF_LENGTH, DMA_FROM_DEVICE);
c73b0183 545 if (dma_mapping_error(kdev, mapping)) {
60b4ea17 546 priv->mib.rx_dma_failed++;
c73b0183 547 dev_kfree_skb_any(skb);
80105bef 548 netif_err(priv, rx_err, ndev, "DMA mapping failure\n");
c73b0183 549 return NULL;
80105bef
FF		 550 }
551
c73b0183
FF		 552 /* Grab the current SKB on the ring */
553 rx_skb = cb->skb;
554 if (likely(rx_skb))
555 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
556 RX_BUF_LENGTH, DMA_FROM_DEVICE);
557
558 /* Put the new SKB on the ring */
559 cb->skb = skb;
80105bef 560 dma_unmap_addr_set(cb, dma_addr, mapping);
baf387a8 561 dma_desc_set_addr(priv, cb->bd_addr, mapping);
80105bef
FF		 562
563 netif_dbg(priv, rx_status, ndev, "RX refill\n");
564
c73b0183
FF		 565 /* Return the current SKB to the caller */
566 return rx_skb;
80105bef
FF		 567}
568
569static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv)
570{
571 struct bcm_sysport_cb *cb;
c73b0183 572 struct sk_buff *skb;
80105bef
FF		 573 unsigned int i;
574
575 for (i = 0; i < priv->num_rx_bds; i++) {
baf387a8 576 cb = &priv->rx_cbs[i];
c73b0183
FF		 577 skb = bcm_sysport_rx_refill(priv, cb);
578 if (skb)
579 dev_kfree_skb(skb);
580 if (!cb->skb)
581 return -ENOMEM;
80105bef
FF		 582 }
583
c73b0183 584 return 0;
80105bef
FF		 585}
586
587/* Poll the hardware for up to budget packets to process */
588static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv,
589 unsigned int budget)
590{
80105bef
FF		 591 struct net_device *ndev = priv->netdev;
592 unsigned int processed = 0, to_process;
593 struct bcm_sysport_cb *cb;
594 struct sk_buff *skb;
595 unsigned int p_index;
596 u16 len, status;
3afc557d 597 struct bcm_rsb *rsb;
80105bef
FF		 598
599 /* Determine how much we should process since last call */
600 p_index = rdma_readl(priv, RDMA_PROD_INDEX);
601 p_index &= RDMA_PROD_INDEX_MASK;
602
603 if (p_index < priv->rx_c_index)
604 to_process = (RDMA_CONS_INDEX_MASK + 1) -
605 priv->rx_c_index + p_index;
606 else
607 to_process = p_index - priv->rx_c_index;
608
609 netif_dbg(priv, rx_status, ndev,
23acb2fc
FF		 610 "p_index=%d rx_c_index=%d to_process=%d\n",
611 p_index, priv->rx_c_index, to_process);
80105bef 612
23acb2fc 613 while ((processed < to_process) && (processed < budget)) {
80105bef 614 cb = &priv->rx_cbs[priv->rx_read_ptr];
c73b0183 615 skb = bcm_sysport_rx_refill(priv, cb);
fe24ba08 616
fe24ba08
FF		 617
618 /* We do not have a backing SKB, so we do not a corresponding
619 * DMA mapping for this incoming packet since
620 * bcm_sysport_rx_refill always either has both skb and mapping
621 * or none.
622 */
623 if (unlikely(!skb)) {
624 netif_err(priv, rx_err, ndev, "out of memory!\n");
625 ndev->stats.rx_dropped++;
626 ndev->stats.rx_errors++;
c73b0183 627 goto next;
fe24ba08
FF		 628 }
629
80105bef 630 /* Extract the Receive Status Block prepended */
3afc557d 631 rsb = (struct bcm_rsb *)skb->data;
80105bef
FF		 632 len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK;
633 status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) &
23acb2fc 634 DESC_STATUS_MASK;
80105bef 635
80105bef 636 netif_dbg(priv, rx_status, ndev,
23acb2fc
FF		 637 "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n",
638 p_index, priv->rx_c_index, priv->rx_read_ptr,
639 len, status);
80105bef 640
25977ac7
FF		 641 if (unlikely(len > RX_BUF_LENGTH)) {
642 netif_err(priv, rx_status, ndev, "oversized packet\n");
643 ndev->stats.rx_length_errors++;
644 ndev->stats.rx_errors++;
645 dev_kfree_skb_any(skb);
646 goto next;
647 }
648
80105bef
FF		 649 if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) {
650 netif_err(priv, rx_status, ndev, "fragmented packet!\n");
651 ndev->stats.rx_dropped++;
652 ndev->stats.rx_errors++;
c73b0183
FF		 653 dev_kfree_skb_any(skb);
654 goto next;
80105bef
FF		 655 }
656
657 if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) {
658 netif_err(priv, rx_err, ndev, "error packet\n");
ad51c610 659 if (status & RX_STATUS_OVFLOW)
80105bef
FF		 660 ndev->stats.rx_over_errors++;
661 ndev->stats.rx_dropped++;
662 ndev->stats.rx_errors++;
c73b0183
FF		 663 dev_kfree_skb_any(skb);
664 goto next;
80105bef
FF		 665 }
666
667 skb_put(skb, len);
668
669 /* Hardware validated our checksum */
670 if (likely(status & DESC_L4_CSUM))
671 skb->ip_summed = CHECKSUM_UNNECESSARY;
672
e0ea05d0
FF		 673 /* Hardware pre-pends packets with 2bytes before Ethernet
674 * header plus we have the Receive Status Block, strip off all
675 * of this from the SKB.
80105bef
FF		 676 */
677 skb_pull(skb, sizeof(*rsb) + 2);
678 len -= (sizeof(*rsb) + 2);
679
680 /* UniMAC may forward CRC */
681 if (priv->crc_fwd) {
682 skb_trim(skb, len - ETH_FCS_LEN);
683 len -= ETH_FCS_LEN;
684 }
685
686 skb->protocol = eth_type_trans(skb, ndev);
687 ndev->stats.rx_packets++;
688 ndev->stats.rx_bytes += len;
689
690 napi_gro_receive(&priv->napi, skb);
c73b0183
FF		 691next:
692 processed++;
693 priv->rx_read_ptr++;
694
695 if (priv->rx_read_ptr == priv->num_rx_bds)
696 priv->rx_read_ptr = 0;
80105bef
FF		 697 }
698
699 return processed;
700}
701
702static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_priv *priv,
23acb2fc
FF		 703 struct bcm_sysport_cb *cb,
704 unsigned int *bytes_compl,
705 unsigned int *pkts_compl)
80105bef
FF		 706{
707 struct device *kdev = &priv->pdev->dev;
708 struct net_device *ndev = priv->netdev;
709
710 if (cb->skb) {
711 ndev->stats.tx_bytes += cb->skb->len;
712 *bytes_compl += cb->skb->len;
713 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
23acb2fc
FF		 714 dma_unmap_len(cb, dma_len),
715 DMA_TO_DEVICE);
80105bef
FF		 716 ndev->stats.tx_packets++;
717 (*pkts_compl)++;
718 bcm_sysport_free_cb(cb);
719 /* SKB fragment */
720 } else if (dma_unmap_addr(cb, dma_addr)) {
721 ndev->stats.tx_bytes += dma_unmap_len(cb, dma_len);
722 dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr),
23acb2fc 723 dma_unmap_len(cb, dma_len), DMA_TO_DEVICE);
80105bef
FF		 724 dma_unmap_addr_set(cb, dma_addr, 0);
725 }
726}
727
728/* Reclaim queued SKBs for transmission completion, lockless version */
729static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
730 struct bcm_sysport_tx_ring *ring)
731{
732 struct net_device *ndev = priv->netdev;
733 unsigned int c_index, last_c_index, last_tx_cn, num_tx_cbs;
734 unsigned int pkts_compl = 0, bytes_compl = 0;
735 struct bcm_sysport_cb *cb;
736 struct netdev_queue *txq;
737 u32 hw_ind;
738
739 txq = netdev_get_tx_queue(ndev, ring->index);
740
741 /* Compute how many descriptors have been processed since last call */
742 hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index));
743 c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK;
744 ring->p_index = (hw_ind & RING_PROD_INDEX_MASK);
745
746 last_c_index = ring->c_index;
747 num_tx_cbs = ring->size;
748
749 c_index &= (num_tx_cbs - 1);
750
751 if (c_index >= last_c_index)
752 last_tx_cn = c_index - last_c_index;
753 else
754 last_tx_cn = num_tx_cbs - last_c_index + c_index;
755
756 netif_dbg(priv, tx_done, ndev,
23acb2fc
FF		 757 "ring=%d c_index=%d last_tx_cn=%d last_c_index=%d\n",
758 ring->index, c_index, last_tx_cn, last_c_index);
80105bef
FF		 759
760 while (last_tx_cn-- > 0) {
761 cb = ring->cbs + last_c_index;
762 bcm_sysport_tx_reclaim_one(priv, cb, &bytes_compl, &pkts_compl);
763
764 ring->desc_count++;
765 last_c_index++;
766 last_c_index &= (num_tx_cbs - 1);
767 }
768
769 ring->c_index = c_index;
770
771 if (netif_tx_queue_stopped(txq) && pkts_compl)
772 netif_tx_wake_queue(txq);
773
774 netif_dbg(priv, tx_done, ndev,
23acb2fc
FF		 775 "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n",
776 ring->index, ring->c_index, pkts_compl, bytes_compl);
80105bef
FF		 777
778 return pkts_compl;
779}
780
781/* Locked version of the per-ring TX reclaim routine */
782static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv,
783 struct bcm_sysport_tx_ring *ring)
784{
785 unsigned int released;
d8498088 786 unsigned long flags;
80105bef 787
d8498088 788 spin_lock_irqsave(&ring->lock, flags);
80105bef 789 released = __bcm_sysport_tx_reclaim(priv, ring);
d8498088 790 spin_unlock_irqrestore(&ring->lock, flags);
80105bef
FF		 791
792 return released;
793}
794
795static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget)
796{
797 struct bcm_sysport_tx_ring *ring =
798 container_of(napi, struct bcm_sysport_tx_ring, napi);
799 unsigned int work_done = 0;
800
801 work_done = bcm_sysport_tx_reclaim(ring->priv, ring);
802
16f62d9b 803 if (work_done == 0) {
80105bef
FF		 804 napi_complete(napi);
805 /* re-enable TX interrupt */
806 intrl2_1_mask_clear(ring->priv, BIT(ring->index));
9dfa9a27
FF		 807
808 return 0;
80105bef
FF		 809 }
810
9dfa9a27 811 return budget;
80105bef
FF		 812}
813
814static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv)
815{
816 unsigned int q;
817
818 for (q = 0; q < priv->netdev->num_tx_queues; q++)
819 bcm_sysport_tx_reclaim(priv, &priv->tx_rings[q]);
820}
821
822static int bcm_sysport_poll(struct napi_struct *napi, int budget)
823{
824 struct bcm_sysport_priv *priv =
825 container_of(napi, struct bcm_sysport_priv, napi);
826 unsigned int work_done = 0;
827
828 work_done = bcm_sysport_desc_rx(priv, budget);
829
830 priv->rx_c_index += work_done;
831 priv->rx_c_index &= RDMA_CONS_INDEX_MASK;
832 rdma_writel(priv, priv->rx_c_index, RDMA_CONS_INDEX);
833
834 if (work_done < budget) {
835 napi_complete(napi);
836 /* re-enable RX interrupts */
837 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE);
838 }
839
840 return work_done;
841}
842
83e82f4c
FF		 843static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv)
844{
845 u32 reg;
846
847 /* Stop monitoring MPD interrupt */
848 intrl2_0_mask_set(priv, INTRL2_0_MPD);
849
850 /* Clear the MagicPacket detection logic */
851 reg = umac_readl(priv, UMAC_MPD_CTRL);
852 reg &= ~MPD_EN;
853 umac_writel(priv, reg, UMAC_MPD_CTRL);
854
855 netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n");
856}
80105bef
FF		 857
858/* RX and misc interrupt routine */
859static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id)
860{
861 struct net_device *dev = dev_id;
862 struct bcm_sysport_priv *priv = netdev_priv(dev);
863
864 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
865 ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
866 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
867
868 if (unlikely(priv->irq0_stat == 0)) {
869 netdev_warn(priv->netdev, "spurious RX interrupt\n");
870 return IRQ_NONE;
871 }
872
873 if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) {
874 if (likely(napi_schedule_prep(&priv->napi))) {
875 /* disable RX interrupts */
876 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE);
877 __napi_schedule(&priv->napi);
878 }
879 }
880
881 /* TX ring is full, perform a full reclaim since we do not know
882 * which one would trigger this interrupt
883 */
884 if (priv->irq0_stat & INTRL2_0_TX_RING_FULL)
885 bcm_sysport_tx_reclaim_all(priv);
886
83e82f4c
FF		 887 if (priv->irq0_stat & INTRL2_0_MPD) {
888 netdev_info(priv->netdev, "Wake-on-LAN interrupt!\n");
889 bcm_sysport_resume_from_wol(priv);
890 }
891
80105bef
FF		 892 return IRQ_HANDLED;
893}
894
895/* TX interrupt service routine */
896static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id)
897{
898 struct net_device *dev = dev_id;
899 struct bcm_sysport_priv *priv = netdev_priv(dev);
900 struct bcm_sysport_tx_ring *txr;
901 unsigned int ring;
902
903 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
904 ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
905 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
906
907 if (unlikely(priv->irq1_stat == 0)) {
908 netdev_warn(priv->netdev, "spurious TX interrupt\n");
909 return IRQ_NONE;
910 }
911
912 for (ring = 0; ring < dev->num_tx_queues; ring++) {
913 if (!(priv->irq1_stat & BIT(ring)))
914 continue;
915
916 txr = &priv->tx_rings[ring];
917
918 if (likely(napi_schedule_prep(&txr->napi))) {
919 intrl2_1_mask_set(priv, BIT(ring));
920 __napi_schedule(&txr->napi);
921 }
922 }
923
924 return IRQ_HANDLED;
925}
926
83e82f4c
FF		 927static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id)
928{
929 struct bcm_sysport_priv *priv = dev_id;
930
931 pm_wakeup_event(&priv->pdev->dev, 0);
932
933 return IRQ_HANDLED;
934}
935
6cec4f5e
FF		 936#ifdef CONFIG_NET_POLL_CONTROLLER
937static void bcm_sysport_poll_controller(struct net_device *dev)
938{
939 struct bcm_sysport_priv *priv = netdev_priv(dev);
940
941 disable_irq(priv->irq0);
942 bcm_sysport_rx_isr(priv->irq0, priv);
943 enable_irq(priv->irq0);
944
945 disable_irq(priv->irq1);
946 bcm_sysport_tx_isr(priv->irq1, priv);
947 enable_irq(priv->irq1);
948}
949#endif
950
e87474a6
FF		 951static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb,
952 struct net_device *dev)
80105bef
FF		 953{
954 struct sk_buff *nskb;
3afc557d 955 struct bcm_tsb *tsb;
80105bef
FF		 956 u32 csum_info;
957 u8 ip_proto;
958 u16 csum_start;
959 u16 ip_ver;
960
961 /* Re-allocate SKB if needed */
962 if (unlikely(skb_headroom(skb) < sizeof(*tsb))) {
963 nskb = skb_realloc_headroom(skb, sizeof(*tsb));
964 dev_kfree_skb(skb);
965 if (!nskb) {
966 dev->stats.tx_errors++;
967 dev->stats.tx_dropped++;
e87474a6 968 return NULL;
80105bef
FF		 969 }
970 skb = nskb;
971 }
972
3afc557d 973 tsb = (struct bcm_tsb *)skb_push(skb, sizeof(*tsb));
80105bef
FF		 974 /* Zero-out TSB by default */
975 memset(tsb, 0, sizeof(*tsb));
976
977 if (skb->ip_summed == CHECKSUM_PARTIAL) {
978 ip_ver = htons(skb->protocol);
979 switch (ip_ver) {
980 case ETH_P_IP:
981 ip_proto = ip_hdr(skb)->protocol;
982 break;
983 case ETH_P_IPV6:
984 ip_proto = ipv6_hdr(skb)->nexthdr;
985 break;
986 default:
e87474a6 987 return skb;
80105bef
FF		 988 }
989
990 /* Get the checksum offset and the L4 (transport) offset */
991 csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb);
992 csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK;
993 csum_info |= (csum_start << L4_PTR_SHIFT);
994
995 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
996 csum_info |= L4_LENGTH_VALID;
997 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
998 csum_info |= L4_UDP;
23acb2fc 999 } else {
80105bef 1000 csum_info = 0;
23acb2fc 1001 }
80105bef
FF		 1002
1003 tsb->l4_ptr_dest_map = csum_info;
1004 }
1005
e87474a6 1006 return skb;
80105bef
FF		 1007}
1008
1009static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb,
1010 struct net_device *dev)
1011{
1012 struct bcm_sysport_priv *priv = netdev_priv(dev);
1013 struct device *kdev = &priv->pdev->dev;
1014 struct bcm_sysport_tx_ring *ring;
1015 struct bcm_sysport_cb *cb;
1016 struct netdev_queue *txq;
1017 struct dma_desc *desc;
dab531b4 1018 unsigned int skb_len;
d8498088 1019 unsigned long flags;
80105bef
FF		 1020 dma_addr_t mapping;
1021 u32 len_status;
1022 u16 queue;
1023 int ret;
1024
1025 queue = skb_get_queue_mapping(skb);
1026 txq = netdev_get_tx_queue(dev, queue);
1027 ring = &priv->tx_rings[queue];
1028
d8498088
FF		 1029 /* lock against tx reclaim in BH context and TX ring full interrupt */
1030 spin_lock_irqsave(&ring->lock, flags);
80105bef
FF		 1031 if (unlikely(ring->desc_count == 0)) {
1032 netif_tx_stop_queue(txq);
1033 netdev_err(dev, "queue %d awake and ring full!\n", queue);
1034 ret = NETDEV_TX_BUSY;
1035 goto out;
1036 }
1037
1038 /* Insert TSB and checksum infos */
1039 if (priv->tsb_en) {
e87474a6
FF		 1040 skb = bcm_sysport_insert_tsb(skb, dev);
1041 if (!skb) {
80105bef
FF		 1042 ret = NETDEV_TX_OK;
1043 goto out;
1044 }
1045 }
1046
dab531b4
FF		 1047 /* The Ethernet switch we are interfaced with needs packets to be at
1048 * least 64 bytes (including FCS) otherwise they will be discarded when
1049 * they enter the switch port logic. When Broadcom tags are enabled, we
1050 * need to make sure that packets are at least 68 bytes
1051 * (including FCS and tag) because the length verification is done after
1052 * the Broadcom tag is stripped off the ingress packet.
1053 */
1054 if (skb_padto(skb, ETH_ZLEN + ENET_BRCM_TAG_LEN)) {
1055 ret = NETDEV_TX_OK;
1056 goto out;
1057 }
1058
1059 skb_len = skb->len < ETH_ZLEN + ENET_BRCM_TAG_LEN ?
1060 ETH_ZLEN + ENET_BRCM_TAG_LEN : skb->len;
1061
1062 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
80105bef 1063 if (dma_mapping_error(kdev, mapping)) {
60b4ea17 1064 priv->mib.tx_dma_failed++;
80105bef 1065 netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n",
23acb2fc 1066 skb->data, skb_len);
80105bef
FF		 1067 ret = NETDEV_TX_OK;
1068 goto out;
1069 }
1070
1071 /* Remember the SKB for future freeing */
1072 cb = &ring->cbs[ring->curr_desc];
1073 cb->skb = skb;
1074 dma_unmap_addr_set(cb, dma_addr, mapping);
dab531b4 1075 dma_unmap_len_set(cb, dma_len, skb_len);
80105bef
FF		 1076
1077 /* Fetch a descriptor entry from our pool */
1078 desc = ring->desc_cpu;
1079
1080 desc->addr_lo = lower_32_bits(mapping);
1081 len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK;
dab531b4 1082 len_status |= (skb_len << DESC_LEN_SHIFT);
80105bef 1083 len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) <<
23acb2fc 1084 DESC_STATUS_SHIFT;
80105bef
FF		 1085 if (skb->ip_summed == CHECKSUM_PARTIAL)
1086 len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT);
1087
1088 ring->curr_desc++;
1089 if (ring->curr_desc == ring->size)
1090 ring->curr_desc = 0;
1091 ring->desc_count--;
1092
1093 /* Ensure write completion of the descriptor status/length
1094 * in DRAM before the System Port WRITE_PORT register latches
1095 * the value
1096 */
1097 wmb();
1098 desc->addr_status_len = len_status;
1099 wmb();
1100
1101 /* Write this descriptor address to the RING write port */
1102 tdma_port_write_desc_addr(priv, desc, ring->index);
1103
1104 /* Check ring space and update SW control flow */
1105 if (ring->desc_count == 0)
1106 netif_tx_stop_queue(txq);
1107
1108 netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n",
23acb2fc 1109 ring->index, ring->desc_count, ring->curr_desc);
80105bef
FF		 1110
1111 ret = NETDEV_TX_OK;
1112out:
d8498088 1113 spin_unlock_irqrestore(&ring->lock, flags);
80105bef
FF		 1114 return ret;
1115}
1116
1117static void bcm_sysport_tx_timeout(struct net_device *dev)
1118{
1119 netdev_warn(dev, "transmit timeout!\n");
1120
1121 dev->trans_start = jiffies;
1122 dev->stats.tx_errors++;
1123
1124 netif_tx_wake_all_queues(dev);
1125}
1126
1127/* phylib adjust link callback */
1128static void bcm_sysport_adj_link(struct net_device *dev)
1129{
1130 struct bcm_sysport_priv *priv = netdev_priv(dev);
1131 struct phy_device *phydev = priv->phydev;
1132 unsigned int changed = 0;
1133 u32 cmd_bits = 0, reg;
1134
1135 if (priv->old_link != phydev->link) {
1136 changed = 1;
1137 priv->old_link = phydev->link;
1138 }
1139
1140 if (priv->old_duplex != phydev->duplex) {
1141 changed = 1;
1142 priv->old_duplex = phydev->duplex;
1143 }
1144
1145 switch (phydev->speed) {
1146 case SPEED_2500:
1147 cmd_bits = CMD_SPEED_2500;
1148 break;
1149 case SPEED_1000:
1150 cmd_bits = CMD_SPEED_1000;
1151 break;
1152 case SPEED_100:
1153 cmd_bits = CMD_SPEED_100;
1154 break;
1155 case SPEED_10:
1156 cmd_bits = CMD_SPEED_10;
1157 break;
1158 default:
1159 break;
1160 }
1161 cmd_bits <<= CMD_SPEED_SHIFT;
1162
1163 if (phydev->duplex == DUPLEX_HALF)
1164 cmd_bits |= CMD_HD_EN;
1165
1166 if (priv->old_pause != phydev->pause) {
1167 changed = 1;
1168 priv->old_pause = phydev->pause;
1169 }
1170
1171 if (!phydev->pause)
1172 cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
1173
4a804c01
FF		 1174 if (!changed)
1175 return;
1176
1177 if (phydev->link) {
d5e32cc7
FF		 1178 reg = umac_readl(priv, UMAC_CMD);
1179 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
80105bef
FF		 1180 CMD_HD_EN | CMD_RX_PAUSE_IGNORE |
1181 CMD_TX_PAUSE_IGNORE);
d5e32cc7
FF		 1182 reg |= cmd_bits;
1183 umac_writel(priv, reg, UMAC_CMD);
d5e32cc7 1184 }
4a804c01
FF		 1185
1186 phy_print_status(priv->phydev);
80105bef
FF		 1187}
1188
1189static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
1190 unsigned int index)
1191{
1192 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1193 struct device *kdev = &priv->pdev->dev;
1194 size_t size;
1195 void *p;
1196 u32 reg;
1197
1198 /* Simple descriptors partitioning for now */
1199 size = 256;
1200
1201 /* We just need one DMA descriptor which is DMA-able, since writing to
1202 * the port will allocate a new descriptor in its internal linked-list
1203 */
3e8fc38c
FF		 1204 p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
1205 GFP_KERNEL);
80105bef
FF		 1206 if (!p) {
1207 netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
1208 return -ENOMEM;
1209 }
1210
40a8a317 1211 ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
80105bef
FF		 1212 if (!ring->cbs) {
1213 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1214 return -ENOMEM;
1215 }
1216
1217 /* Initialize SW view of the ring */
1218 spin_lock_init(&ring->lock);
1219 ring->priv = priv;
1220 netif_napi_add(priv->netdev, &ring->napi, bcm_sysport_tx_poll, 64);
1221 ring->index = index;
1222 ring->size = size;
1223 ring->alloc_size = ring->size;
1224 ring->desc_cpu = p;
1225 ring->desc_count = ring->size;
1226 ring->curr_desc = 0;
1227
1228 /* Initialize HW ring */
1229 tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index));
1230 tdma_writel(priv, 0, TDMA_DESC_RING_COUNT(index));
1231 tdma_writel(priv, 1, TDMA_DESC_RING_INTR_CONTROL(index));
1232 tdma_writel(priv, 0, TDMA_DESC_RING_PROD_CONS_INDEX(index));
1233 tdma_writel(priv, RING_IGNORE_STATUS, TDMA_DESC_RING_MAPPING(index));
1234 tdma_writel(priv, 0, TDMA_DESC_RING_PCP_DEI_VID(index));
1235
1236 /* Program the number of descriptors as MAX_THRESHOLD and half of
1237 * its size for the hysteresis trigger
1238 */
1239 tdma_writel(priv, ring->size |
1240 1 << RING_HYST_THRESH_SHIFT,
1241 TDMA_DESC_RING_MAX_HYST(index));
1242
1243 /* Enable the ring queue in the arbiter */
1244 reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN);
1245 reg |= (1 << index);
1246 tdma_writel(priv, reg, TDMA_TIER1_ARB_0_QUEUE_EN);
1247
1248 napi_enable(&ring->napi);
1249
1250 netif_dbg(priv, hw, priv->netdev,
23acb2fc
FF		 1251 "TDMA cfg, size=%d, desc_cpu=%p\n",
1252 ring->size, ring->desc_cpu);
80105bef
FF		 1253
1254 return 0;
1255}
1256
1257static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
23acb2fc 1258 unsigned int index)
80105bef
FF		 1259{
1260 struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index];
1261 struct device *kdev = &priv->pdev->dev;
1262 u32 reg;
1263
1264 /* Caller should stop the TDMA engine */
1265 reg = tdma_readl(priv, TDMA_STATUS);
1266 if (!(reg & TDMA_DISABLED))
1267 netdev_warn(priv->netdev, "TDMA not stopped!\n");
1268
914adb55
FF		 1269 /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could
1270 * fail, so by checking this pointer we know whether the TX ring was
1271 * fully initialized or not.
1272 */
1273 if (!ring->cbs)
1274 return;
1275
80105bef
FF		 1276 napi_disable(&ring->napi);
1277 netif_napi_del(&ring->napi);
1278
1279 bcm_sysport_tx_reclaim(priv, ring);
1280
1281 kfree(ring->cbs);
1282 ring->cbs = NULL;
1283
1284 if (ring->desc_dma) {
3e8fc38c
FF		 1285 dma_free_coherent(kdev, sizeof(struct dma_desc),
1286 ring->desc_cpu, ring->desc_dma);
80105bef
FF		 1287 ring->desc_dma = 0;
1288 }
1289 ring->size = 0;
1290 ring->alloc_size = 0;
1291
1292 netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n");
1293}
1294
1295/* RDMA helper */
1296static inline int rdma_enable_set(struct bcm_sysport_priv *priv,
23acb2fc 1297 unsigned int enable)
80105bef
FF		 1298{
1299 unsigned int timeout = 1000;
1300 u32 reg;
1301
1302 reg = rdma_readl(priv, RDMA_CONTROL);
1303 if (enable)
1304 reg |= RDMA_EN;
1305 else
1306 reg &= ~RDMA_EN;
1307 rdma_writel(priv, reg, RDMA_CONTROL);
1308
1309 /* Poll for RMDA disabling completion */
1310 do {
1311 reg = rdma_readl(priv, RDMA_STATUS);
1312 if (!!(reg & RDMA_DISABLED) == !enable)
1313 return 0;
1314 usleep_range(1000, 2000);
1315 } while (timeout-- > 0);
1316
1317 netdev_err(priv->netdev, "timeout waiting for RDMA to finish\n");
1318
1319 return -ETIMEDOUT;
1320}
1321
1322/* TDMA helper */
1323static inline int tdma_enable_set(struct bcm_sysport_priv *priv,
23acb2fc 1324 unsigned int enable)
80105bef
FF		 1325{
1326 unsigned int timeout = 1000;
1327 u32 reg;
1328
1329 reg = tdma_readl(priv, TDMA_CONTROL);
1330 if (enable)
1331 reg |= TDMA_EN;
1332 else
1333 reg &= ~TDMA_EN;
1334 tdma_writel(priv, reg, TDMA_CONTROL);
1335
1336 /* Poll for TMDA disabling completion */
1337 do {
1338 reg = tdma_readl(priv, TDMA_STATUS);
1339 if (!!(reg & TDMA_DISABLED) == !enable)
1340 return 0;
1341
1342 usleep_range(1000, 2000);
1343 } while (timeout-- > 0);
1344
1345 netdev_err(priv->netdev, "timeout waiting for TDMA to finish\n");
1346
1347 return -ETIMEDOUT;
1348}
1349
1350static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv)
1351{
baf387a8 1352 struct bcm_sysport_cb *cb;
80105bef
FF		 1353 u32 reg;
1354 int ret;
baf387a8 1355 int i;
80105bef
FF		 1356
1357 /* Initialize SW view of the RX ring */
1358 priv->num_rx_bds = NUM_RX_DESC;
1359 priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET;
80105bef
FF		 1360 priv->rx_c_index = 0;
1361 priv->rx_read_ptr = 0;
40a8a317
FF		 1362 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct bcm_sysport_cb),
1363 GFP_KERNEL);
80105bef
FF		 1364 if (!priv->rx_cbs) {
1365 netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
1366 return -ENOMEM;
1367 }
1368
baf387a8
FF		 1369 for (i = 0; i < priv->num_rx_bds; i++) {
1370 cb = priv->rx_cbs + i;
1371 cb->bd_addr = priv->rx_bds + i * DESC_SIZE;
1372 }
1373
80105bef
FF		 1374 ret = bcm_sysport_alloc_rx_bufs(priv);
1375 if (ret) {
1376 netif_err(priv, hw, priv->netdev, "SKB allocation failed\n");
1377 return ret;
1378 }
1379
1380 /* Initialize HW, ensure RDMA is disabled */
1381 reg = rdma_readl(priv, RDMA_STATUS);
1382 if (!(reg & RDMA_DISABLED))
1383 rdma_enable_set(priv, 0);
1384
1385 rdma_writel(priv, 0, RDMA_WRITE_PTR_LO);
1386 rdma_writel(priv, 0, RDMA_WRITE_PTR_HI);
1387 rdma_writel(priv, 0, RDMA_PROD_INDEX);
1388 rdma_writel(priv, 0, RDMA_CONS_INDEX);
1389 rdma_writel(priv, priv->num_rx_bds << RDMA_RING_SIZE_SHIFT |
1390 RX_BUF_LENGTH, RDMA_RING_BUF_SIZE);
1391 /* Operate the queue in ring mode */
1392 rdma_writel(priv, 0, RDMA_START_ADDR_HI);
1393 rdma_writel(priv, 0, RDMA_START_ADDR_LO);
1394 rdma_writel(priv, 0, RDMA_END_ADDR_HI);
1395 rdma_writel(priv, NUM_HW_RX_DESC_WORDS - 1, RDMA_END_ADDR_LO);
1396
1397 rdma_writel(priv, 1, RDMA_MBDONE_INTR);
1398
1399 netif_dbg(priv, hw, priv->netdev,
23acb2fc
FF		 1400 "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n",
1401 priv->num_rx_bds, priv->rx_bds);
80105bef
FF		 1402
1403 return 0;
1404}
1405
1406static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv)
1407{
1408 struct bcm_sysport_cb *cb;
1409 unsigned int i;
1410 u32 reg;
1411
1412 /* Caller should ensure RDMA is disabled */
1413 reg = rdma_readl(priv, RDMA_STATUS);
1414 if (!(reg & RDMA_DISABLED))
1415 netdev_warn(priv->netdev, "RDMA not stopped!\n");
1416
1417 for (i = 0; i < priv->num_rx_bds; i++) {
1418 cb = &priv->rx_cbs[i];
1419 if (dma_unmap_addr(cb, dma_addr))
1420 dma_unmap_single(&priv->pdev->dev,
23acb2fc
FF		 1421 dma_unmap_addr(cb, dma_addr),
1422 RX_BUF_LENGTH, DMA_FROM_DEVICE);
80105bef
FF		 1423 bcm_sysport_free_cb(cb);
1424 }
1425
1426 kfree(priv->rx_cbs);
1427 priv->rx_cbs = NULL;
1428
1429 netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n");
1430}
1431
1432static void bcm_sysport_set_rx_mode(struct net_device *dev)
1433{
1434 struct bcm_sysport_priv *priv = netdev_priv(dev);
1435 u32 reg;
1436
1437 reg = umac_readl(priv, UMAC_CMD);
1438 if (dev->flags & IFF_PROMISC)
1439 reg |= CMD_PROMISC;
1440 else
1441 reg &= ~CMD_PROMISC;
1442 umac_writel(priv, reg, UMAC_CMD);
1443
1444 /* No support for ALLMULTI */
1445 if (dev->flags & IFF_ALLMULTI)
1446 return;
1447}
1448
1449static inline void umac_enable_set(struct bcm_sysport_priv *priv,
23acb2fc 1450 u32 mask, unsigned int enable)
80105bef
FF		 1451{
1452 u32 reg;
1453
1454 reg = umac_readl(priv, UMAC_CMD);
1455 if (enable)
18e21b01 1456 reg |= mask;
80105bef 1457 else
18e21b01 1458 reg &= ~mask;
80105bef 1459 umac_writel(priv, reg, UMAC_CMD);
00b91c69
FF		 1460
1461 /* UniMAC stops on a packet boundary, wait for a full-sized packet
1462 * to be processed (1 msec).
1463 */
1464 if (enable == 0)
1465 usleep_range(1000, 2000);
80105bef
FF		 1466}
1467
412bce83 1468static inline void umac_reset(struct bcm_sysport_priv *priv)
80105bef 1469{
80105bef 1470 u32 reg;
80105bef 1471
412bce83
FF		 1472 reg = umac_readl(priv, UMAC_CMD);
1473 reg |= CMD_SW_RESET;
1474 umac_writel(priv, reg, UMAC_CMD);
1475 udelay(10);
1476 reg = umac_readl(priv, UMAC_CMD);
1477 reg &= ~CMD_SW_RESET;
1478 umac_writel(priv, reg, UMAC_CMD);
80105bef
FF		 1479}
1480
1481static void umac_set_hw_addr(struct bcm_sysport_priv *priv,
23acb2fc 1482 unsigned char *addr)
80105bef
FF		 1483{
1484 umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) |
1485 (addr[2] << 8) | addr[3], UMAC_MAC0);
1486 umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1);
1487}
1488
1489static void topctrl_flush(struct bcm_sysport_priv *priv)
1490{
1491 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
1492 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1493 mdelay(1);
1494 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
1495 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
1496}
1497
fb3b596d
FF		 1498static int bcm_sysport_change_mac(struct net_device *dev, void *p)
1499{
1500 struct bcm_sysport_priv *priv = netdev_priv(dev);
1501 struct sockaddr *addr = p;
1502
1503 if (!is_valid_ether_addr(addr->sa_data))
1504 return -EINVAL;
1505
1506 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1507
1508 /* interface is disabled, changes to MAC will be reflected on next
1509 * open call
1510 */
1511 if (!netif_running(dev))
1512 return 0;
1513
1514 umac_set_hw_addr(priv, dev->dev_addr);
1515
1516 return 0;
1517}
1518
b02e6d9b
FF		 1519static void bcm_sysport_netif_start(struct net_device *dev)
1520{
1521 struct bcm_sysport_priv *priv = netdev_priv(dev);
1522
1523 /* Enable NAPI */
1524 napi_enable(&priv->napi);
1525
8edf0047
FF		 1526 /* Enable RX interrupt and TX ring full interrupt */
1527 intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1528
b02e6d9b
FF		 1529 phy_start(priv->phydev);
1530
1531 /* Enable TX interrupts for the 32 TXQs */
1532 intrl2_1_mask_clear(priv, 0xffffffff);
1533
1534 /* Last call before we start the real business */
1535 netif_tx_start_all_queues(dev);
1536}
1537
40755a0f
FF		 1538static void rbuf_init(struct bcm_sysport_priv *priv)
1539{
1540 u32 reg;
1541
1542 reg = rbuf_readl(priv, RBUF_CONTROL);
1543 reg |= RBUF_4B_ALGN | RBUF_RSB_EN;
1544 rbuf_writel(priv, reg, RBUF_CONTROL);
1545}
1546
80105bef
FF		 1547static int bcm_sysport_open(struct net_device *dev)
1548{
1549 struct bcm_sysport_priv *priv = netdev_priv(dev);
1550 unsigned int i;
80105bef
FF		 1551 int ret;
1552
1553 /* Reset UniMAC */
412bce83 1554 umac_reset(priv);
80105bef
FF		 1555
1556 /* Flush TX and RX FIFOs at TOPCTRL level */
1557 topctrl_flush(priv);
1558
1559 /* Disable the UniMAC RX/TX */
18e21b01 1560 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
80105bef
FF		 1561
1562 /* Enable RBUF 2bytes alignment and Receive Status Block */
40755a0f 1563 rbuf_init(priv);
80105bef
FF		 1564
1565 /* Set maximum frame length */
1566 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1567
1568 /* Set MAC address */
1569 umac_set_hw_addr(priv, dev->dev_addr);
1570
1571 /* Read CRC forward */
1572 priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD);
1573
186534a3
FF		 1574 priv->phydev = of_phy_connect(dev, priv->phy_dn, bcm_sysport_adj_link,
1575 0, priv->phy_interface);
80105bef
FF		 1576 if (!priv->phydev) {
1577 netdev_err(dev, "could not attach to PHY\n");
1578 return -ENODEV;
1579 }
1580
1581 /* Reset house keeping link status */
1582 priv->old_duplex = -1;
1583 priv->old_link = -1;
1584 priv->old_pause = -1;
1585
1586 /* mask all interrupts and request them */
1587 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
1588 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1589 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1590 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
1591 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1592 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1593
1594 ret = request_irq(priv->irq0, bcm_sysport_rx_isr, 0, dev->name, dev);
1595 if (ret) {
1596 netdev_err(dev, "failed to request RX interrupt\n");
1597 goto out_phy_disconnect;
1598 }
1599
1600 ret = request_irq(priv->irq1, bcm_sysport_tx_isr, 0, dev->name, dev);
1601 if (ret) {
1602 netdev_err(dev, "failed to request TX interrupt\n");
1603 goto out_free_irq0;
1604 }
1605
1606 /* Initialize both hardware and software ring */
1607 for (i = 0; i < dev->num_tx_queues; i++) {
1608 ret = bcm_sysport_init_tx_ring(priv, i);
1609 if (ret) {
1610 netdev_err(dev, "failed to initialize TX ring %d\n",
23acb2fc 1611 i);
80105bef
FF		 1612 goto out_free_tx_ring;
1613 }
1614 }
1615
1616 /* Initialize linked-list */
1617 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
1618
1619 /* Initialize RX ring */
1620 ret = bcm_sysport_init_rx_ring(priv);
1621 if (ret) {
1622 netdev_err(dev, "failed to initialize RX ring\n");
1623 goto out_free_rx_ring;
1624 }
1625
1626 /* Turn on RDMA */
1627 ret = rdma_enable_set(priv, 1);
1628 if (ret)
1629 goto out_free_rx_ring;
1630
80105bef
FF		 1631 /* Turn on TDMA */
1632 ret = tdma_enable_set(priv, 1);
1633 if (ret)
1634 goto out_clear_rx_int;
1635
80105bef 1636 /* Turn on UniMAC TX/RX */
18e21b01 1637 umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 1);
80105bef 1638
b02e6d9b 1639 bcm_sysport_netif_start(dev);
80105bef
FF		 1640
1641 return 0;
1642
1643out_clear_rx_int:
1644 intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL);
1645out_free_rx_ring:
1646 bcm_sysport_fini_rx_ring(priv);
1647out_free_tx_ring:
1648 for (i = 0; i < dev->num_tx_queues; i++)
1649 bcm_sysport_fini_tx_ring(priv, i);
1650 free_irq(priv->irq1, dev);
1651out_free_irq0:
1652 free_irq(priv->irq0, dev);
1653out_phy_disconnect:
1654 phy_disconnect(priv->phydev);
1655 return ret;
1656}
1657
b02e6d9b 1658static void bcm_sysport_netif_stop(struct net_device *dev)
80105bef
FF		 1659{
1660 struct bcm_sysport_priv *priv = netdev_priv(dev);
80105bef
FF		 1661
1662 /* stop all software from updating hardware */
1663 netif_tx_stop_all_queues(dev);
1664 napi_disable(&priv->napi);
1665 phy_stop(priv->phydev);
1666
1667 /* mask all interrupts */
1668 intrl2_0_mask_set(priv, 0xffffffff);
1669 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
1670 intrl2_1_mask_set(priv, 0xffffffff);
1671 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
b02e6d9b
FF		 1672}
1673
1674static int bcm_sysport_stop(struct net_device *dev)
1675{
1676 struct bcm_sysport_priv *priv = netdev_priv(dev);
1677 unsigned int i;
1678 int ret;
1679
1680 bcm_sysport_netif_stop(dev);
80105bef
FF		 1681
1682 /* Disable UniMAC RX */
18e21b01 1683 umac_enable_set(priv, CMD_RX_EN, 0);
80105bef
FF		 1684
1685 ret = tdma_enable_set(priv, 0);
1686 if (ret) {
1687 netdev_err(dev, "timeout disabling RDMA\n");
1688 return ret;
1689 }
1690
1691 /* Wait for a maximum packet size to be drained */
1692 usleep_range(2000, 3000);
1693
1694 ret = rdma_enable_set(priv, 0);
1695 if (ret) {
1696 netdev_err(dev, "timeout disabling TDMA\n");
1697 return ret;
1698 }
1699
1700 /* Disable UniMAC TX */
18e21b01 1701 umac_enable_set(priv, CMD_TX_EN, 0);
80105bef
FF		 1702
1703 /* Free RX/TX rings SW structures */
1704 for (i = 0; i < dev->num_tx_queues; i++)
1705 bcm_sysport_fini_tx_ring(priv, i);
1706 bcm_sysport_fini_rx_ring(priv);
1707
1708 free_irq(priv->irq0, dev);
1709 free_irq(priv->irq1, dev);
1710
1711 /* Disconnect from PHY */
1712 phy_disconnect(priv->phydev);
1713
1714 return 0;
1715}
1716
1717static struct ethtool_ops bcm_sysport_ethtool_ops = {
1718 .get_settings = bcm_sysport_get_settings,
1719 .set_settings = bcm_sysport_set_settings,
1720 .get_drvinfo = bcm_sysport_get_drvinfo,
1721 .get_msglevel = bcm_sysport_get_msglvl,
1722 .set_msglevel = bcm_sysport_set_msglvl,
1723 .get_link = ethtool_op_get_link,
1724 .get_strings = bcm_sysport_get_strings,
1725 .get_ethtool_stats = bcm_sysport_get_stats,
1726 .get_sset_count = bcm_sysport_get_sset_count,
83e82f4c
FF		 1727 .get_wol = bcm_sysport_get_wol,
1728 .set_wol = bcm_sysport_set_wol,
b1a15e86
FF		 1729 .get_coalesce = bcm_sysport_get_coalesce,
1730 .set_coalesce = bcm_sysport_set_coalesce,
80105bef
FF		 1731};
1732
1733static const struct net_device_ops bcm_sysport_netdev_ops = {
1734 .ndo_start_xmit = bcm_sysport_xmit,
1735 .ndo_tx_timeout = bcm_sysport_tx_timeout,
1736 .ndo_open = bcm_sysport_open,
1737 .ndo_stop = bcm_sysport_stop,
1738 .ndo_set_features = bcm_sysport_set_features,
1739 .ndo_set_rx_mode = bcm_sysport_set_rx_mode,
fb3b596d 1740 .ndo_set_mac_address = bcm_sysport_change_mac,
6cec4f5e
FF		 1741#ifdef CONFIG_NET_POLL_CONTROLLER
1742 .ndo_poll_controller = bcm_sysport_poll_controller,
1743#endif
80105bef
FF		 1744};
1745
1746#define REV_FMT "v%2x.%02x"
1747
1748static int bcm_sysport_probe(struct platform_device *pdev)
1749{
1750 struct bcm_sysport_priv *priv;
1751 struct device_node *dn;
1752 struct net_device *dev;
1753 const void *macaddr;
1754 struct resource *r;
1755 u32 txq, rxq;
1756 int ret;
1757
1758 dn = pdev->dev.of_node;
1759 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1760
1761 /* Read the Transmit/Receive Queue properties */
1762 if (of_property_read_u32(dn, "systemport,num-txq", &txq))
1763 txq = TDMA_NUM_RINGS;
1764 if (of_property_read_u32(dn, "systemport,num-rxq", &rxq))
1765 rxq = 1;
1766
1767 dev = alloc_etherdev_mqs(sizeof(*priv), txq, rxq);
1768 if (!dev)
1769 return -ENOMEM;
1770
1771 /* Initialize private members */
1772 priv = netdev_priv(dev);
1773
1774 priv->irq0 = platform_get_irq(pdev, 0);
1775 priv->irq1 = platform_get_irq(pdev, 1);
83e82f4c 1776 priv->wol_irq = platform_get_irq(pdev, 2);
80105bef
FF		 1777 if (priv->irq0 <= 0 || priv->irq1 <= 0) {
1778 dev_err(&pdev->dev, "invalid interrupts\n");
1779 ret = -EINVAL;
1780 goto err;
1781 }
1782
126e6122
JH		 1783 priv->base = devm_ioremap_resource(&pdev->dev, r);
1784 if (IS_ERR(priv->base)) {
1785 ret = PTR_ERR(priv->base);
80105bef
FF		 1786 goto err;
1787 }
1788
1789 priv->netdev = dev;
1790 priv->pdev = pdev;
1791
1792 priv->phy_interface = of_get_phy_mode(dn);
1793 /* Default to GMII interface mode */
1794 if (priv->phy_interface < 0)
1795 priv->phy_interface = PHY_INTERFACE_MODE_GMII;
1796
186534a3
FF		 1797 /* In the case of a fixed PHY, the DT node associated
1798 * to the PHY is the Ethernet MAC DT node.
1799 */
1800 if (of_phy_is_fixed_link(dn)) {
1801 ret = of_phy_register_fixed_link(dn);
1802 if (ret) {
1803 dev_err(&pdev->dev, "failed to register fixed PHY\n");
1804 goto err;
1805 }
1806
1807 priv->phy_dn = dn;
1808 }
1809
80105bef
FF		 1810 /* Initialize netdevice members */
1811 macaddr = of_get_mac_address(dn);
1812 if (!macaddr || !is_valid_ether_addr(macaddr)) {
1813 dev_warn(&pdev->dev, "using random Ethernet MAC\n");
adb35050 1814 eth_hw_addr_random(dev);
80105bef
FF		 1815 } else {
1816 ether_addr_copy(dev->dev_addr, macaddr);
1817 }
1818
1819 SET_NETDEV_DEV(dev, &pdev->dev);
1820 dev_set_drvdata(&pdev->dev, dev);
7ad24ea4 1821 dev->ethtool_ops = &bcm_sysport_ethtool_ops;
80105bef
FF		 1822 dev->netdev_ops = &bcm_sysport_netdev_ops;
1823 netif_napi_add(dev, &priv->napi, bcm_sysport_poll, 64);
1824
1825 /* HW supported features, none enabled by default */
1826 dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA |
1827 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1828
83e82f4c
FF		 1829 /* Request the WOL interrupt and advertise suspend if available */
1830 priv->wol_irq_disabled = 1;
1831 ret = devm_request_irq(&pdev->dev, priv->wol_irq,
23acb2fc 1832 bcm_sysport_wol_isr, 0, dev->name, priv);
83e82f4c
FF		 1833 if (!ret)
1834 device_set_wakeup_capable(&pdev->dev, 1);
1835
80105bef 1836 /* Set the needed headroom once and for all */
3afc557d
PG		 1837 BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8);
1838 dev->needed_headroom += sizeof(struct bcm_tsb);
80105bef 1839
f532e744
FF		 1840 /* libphy will adjust the link state accordingly */
1841 netif_carrier_off(dev);
1842
80105bef
FF		 1843 ret = register_netdev(dev);
1844 if (ret) {
1845 dev_err(&pdev->dev, "failed to register net_device\n");
1846 goto err;
1847 }
1848
1849 priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
1850 dev_info(&pdev->dev,
23acb2fc
FF		 1851 "Broadcom SYSTEMPORT" REV_FMT
1852 " at 0x%p (irqs: %d, %d, TXQs: %d, RXQs: %d)\n",
1853 (priv->rev >> 8) & 0xff, priv->rev & 0xff,
1854 priv->base, priv->irq0, priv->irq1, txq, rxq);
80105bef
FF		 1855
1856 return 0;
1857err:
1858 free_netdev(dev);
1859 return ret;
1860}
1861
1862static int bcm_sysport_remove(struct platform_device *pdev)
1863{
1864 struct net_device *dev = dev_get_drvdata(&pdev->dev);
1865
1866 /* Not much to do, ndo_close has been called
1867 * and we use managed allocations
1868 */
1869 unregister_netdev(dev);
1870 free_netdev(dev);
1871 dev_set_drvdata(&pdev->dev, NULL);
1872
1873 return 0;
1874}
1875
40755a0f 1876#ifdef CONFIG_PM_SLEEP
83e82f4c
FF		 1877static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv)
1878{
1879 struct net_device *ndev = priv->netdev;
1880 unsigned int timeout = 1000;
1881 u32 reg;
1882
1883 /* Password has already been programmed */
1884 reg = umac_readl(priv, UMAC_MPD_CTRL);
1885 reg |= MPD_EN;
1886 reg &= ~PSW_EN;
1887 if (priv->wolopts & WAKE_MAGICSECURE)
1888 reg |= PSW_EN;
1889 umac_writel(priv, reg, UMAC_MPD_CTRL);
1890
1891 /* Make sure RBUF entered WoL mode as result */
1892 do {
1893 reg = rbuf_readl(priv, RBUF_STATUS);
1894 if (reg & RBUF_WOL_MODE)
1895 break;
1896
1897 udelay(10);
1898 } while (timeout-- > 0);
1899
1900 /* Do not leave the UniMAC RBUF matching only MPD packets */
1901 if (!timeout) {
1902 reg = umac_readl(priv, UMAC_MPD_CTRL);
1903 reg &= ~MPD_EN;
1904 umac_writel(priv, reg, UMAC_MPD_CTRL);
1905 netif_err(priv, wol, ndev, "failed to enter WOL mode\n");
1906 return -ETIMEDOUT;
1907 }
1908
1909 /* UniMAC receive needs to be turned on */
1910 umac_enable_set(priv, CMD_RX_EN, 1);
1911
1912 /* Enable the interrupt wake-up source */
1913 intrl2_0_mask_clear(priv, INTRL2_0_MPD);
1914
1915 netif_dbg(priv, wol, ndev, "entered WOL mode\n");
1916
1917 return 0;
1918}
1919
40755a0f
FF		 1920static int bcm_sysport_suspend(struct device *d)
1921{
1922 struct net_device *dev = dev_get_drvdata(d);
1923 struct bcm_sysport_priv *priv = netdev_priv(dev);
1924 unsigned int i;
83e82f4c 1925 int ret = 0;
40755a0f
FF		 1926 u32 reg;
1927
1928 if (!netif_running(dev))
1929 return 0;
1930
1931 bcm_sysport_netif_stop(dev);
1932
1933 phy_suspend(priv->phydev);
1934
1935 netif_device_detach(dev);
1936
1937 /* Disable UniMAC RX */
1938 umac_enable_set(priv, CMD_RX_EN, 0);
1939
1940 ret = rdma_enable_set(priv, 0);
1941 if (ret) {
1942 netdev_err(dev, "RDMA timeout!\n");
1943 return ret;
1944 }
1945
1946 /* Disable RXCHK if enabled */
9d34c1cb 1947 if (priv->rx_chk_en) {
40755a0f
FF		 1948 reg = rxchk_readl(priv, RXCHK_CONTROL);
1949 reg &= ~RXCHK_EN;
1950 rxchk_writel(priv, reg, RXCHK_CONTROL);
1951 }
1952
1953 /* Flush RX pipe */
83e82f4c
FF		 1954 if (!priv->wolopts)
1955 topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL);
40755a0f
FF		 1956
1957 ret = tdma_enable_set(priv, 0);
1958 if (ret) {
1959 netdev_err(dev, "TDMA timeout!\n");
1960 return ret;
1961 }
1962
1963 /* Wait for a packet boundary */
1964 usleep_range(2000, 3000);
1965
1966 umac_enable_set(priv, CMD_TX_EN, 0);
1967
1968 topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL);
1969
1970 /* Free RX/TX rings SW structures */
1971 for (i = 0; i < dev->num_tx_queues; i++)
1972 bcm_sysport_fini_tx_ring(priv, i);
1973 bcm_sysport_fini_rx_ring(priv);
1974
83e82f4c
FF		 1975 /* Get prepared for Wake-on-LAN */
1976 if (device_may_wakeup(d) && priv->wolopts)
1977 ret = bcm_sysport_suspend_to_wol(priv);
1978
1979 return ret;
40755a0f
FF		 1980}
1981
1982static int bcm_sysport_resume(struct device *d)
1983{
1984 struct net_device *dev = dev_get_drvdata(d);
1985 struct bcm_sysport_priv *priv = netdev_priv(dev);
1986 unsigned int i;
1987 u32 reg;
1988 int ret;
1989
1990 if (!netif_running(dev))
1991 return 0;
1992
704d33e7
FF		 1993 umac_reset(priv);
1994
83e82f4c
FF		 1995 /* We may have been suspended and never received a WOL event that
1996 * would turn off MPD detection, take care of that now
1997 */
1998 bcm_sysport_resume_from_wol(priv);
1999
40755a0f
FF		 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);
2003 if (ret) {
2004 netdev_err(dev, "failed to initialize TX ring %d\n",
23acb2fc 2005 i);
40755a0f
FF		 2006 goto out_free_tx_rings;
2007 }
2008 }
2009
2010 /* Initialize linked-list */
2011 tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS);
2012
2013 /* Initialize RX ring */
2014 ret = bcm_sysport_init_rx_ring(priv);
2015 if (ret) {
2016 netdev_err(dev, "failed to initialize RX ring\n");
2017 goto out_free_rx_ring;
2018 }
2019
2020 netif_device_attach(dev);
2021
40755a0f
FF		 2022 /* RX pipe enable */
2023 topctrl_writel(priv, 0, RX_FLUSH_CNTL);
2024
2025 ret = rdma_enable_set(priv, 1);
2026 if (ret) {
2027 netdev_err(dev, "failed to enable RDMA\n");
2028 goto out_free_rx_ring;
2029 }
2030
2031 /* Enable rxhck */
9d34c1cb 2032 if (priv->rx_chk_en) {
40755a0f
FF		 2033 reg = rxchk_readl(priv, RXCHK_CONTROL);
2034 reg |= RXCHK_EN;
2035 rxchk_writel(priv, reg, RXCHK_CONTROL);
2036 }
2037
2038 rbuf_init(priv);
2039
2040 /* Set maximum frame length */
2041 umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
2042
2043 /* Set MAC address */
2044 umac_set_hw_addr(priv, dev->dev_addr);
2045
2046 umac_enable_set(priv, CMD_RX_EN, 1);
2047
2048 /* TX pipe enable */
2049 topctrl_writel(priv, 0, TX_FLUSH_CNTL);
2050
2051 umac_enable_set(priv, CMD_TX_EN, 1);
2052
2053 ret = tdma_enable_set(priv, 1);
2054 if (ret) {
2055 netdev_err(dev, "TDMA timeout!\n");
2056 goto out_free_rx_ring;
2057 }
2058
2059 phy_resume(priv->phydev);
2060
2061 bcm_sysport_netif_start(dev);
2062
2063 return 0;
2064
2065out_free_rx_ring:
2066 bcm_sysport_fini_rx_ring(priv);
2067out_free_tx_rings:
2068 for (i = 0; i < dev->num_tx_queues; i++)
2069 bcm_sysport_fini_tx_ring(priv, i);
2070 return ret;
2071}
2072#endif
2073
2074static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops,
2075 bcm_sysport_suspend, bcm_sysport_resume);
2076
80105bef
FF		 2077static const struct of_device_id bcm_sysport_of_match[] = {
2078 { .compatible = "brcm,systemport-v1.00" },
2079 { .compatible = "brcm,systemport" },
2080 { /* sentinel */ }
2081};
46d5a343 2082MODULE_DEVICE_TABLE(of, bcm_sysport_of_match);
80105bef
FF		 2083
2084static struct platform_driver bcm_sysport_driver = {
2085 .probe = bcm_sysport_probe,
2086 .remove = bcm_sysport_remove,
2087 .driver = {
2088 .name = "brcm-systemport",
80105bef 2089 .of_match_table = bcm_sysport_of_match,
40755a0f 2090 .pm = &bcm_sysport_pm_ops,
80105bef
FF		 2091 },
2092};
2093module_platform_driver(bcm_sysport_driver);
2094
2095MODULE_AUTHOR("Broadcom Corporation");
2096MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver");
2097MODULE_ALIAS("platform:brcm-systemport");
2098MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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