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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) \ | |
32 | static 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 | } \ | |
37 | static 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 | ||
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); | |
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) \ | |
58 | static 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 | } \ | |
64 | static 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 | ||
71 | BCM_SYSPORT_INTR_L2(0) | |
72 | BCM_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 | */ | |
78 | static 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 | ||
89 | static 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 */ | |
99 | static 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 | ||
110 | static 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 | ||
121 | static 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 | ||
156 | static 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 | ||
176 | static 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 | */ | |
194 | static 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 | ||
284 | static 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 | ||
293 | static 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 | ||
300 | static 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 | ||
307 | static 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 | ||
317 | static 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 | ||
335 | static 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 | ||
377 | static 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 |
400 | static 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 | ||
419 | static 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 |
459 | static 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 | ||
478 | static 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 |
520 | static 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 |
527 | static 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 | ||
569 | static 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 */ | |
588 | static 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 |
691 | next: |
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 | ||
702 | static 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 */ | |
729 | static 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 */ | |
782 | static 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 | ||
795 | static 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 | ||
814 | static 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 | ||
822 | static 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 |
843 | static 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 */ | |
859 | static 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 */ | |
896 | static 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 |
927 | static 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 |
937 | static 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 |
951 | static 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 | ||
1009 | static 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; | |
1112 | out: | |
d8498088 | 1113 | spin_unlock_irqrestore(&ring->lock, flags); |
80105bef FF |
1114 | return ret; |
1115 | } | |
1116 | ||
1117 | static 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 */ | |
1128 | static 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 | ||
1189 | static 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 | ||
1257 | static 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 */ | |
1296 | static 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 */ | |
1323 | static 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 | ||
1350 | static 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 | ||
1406 | static 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 | ||
1432 | static 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 | ||
1449 | static 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 | 1468 | static 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 | ||
1481 | static 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 | ||
1489 | static 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 |
1498 | static 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 |
1519 | static 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 |
1538 | static 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 |
1547 | static 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 | ||
1643 | out_clear_rx_int: | |
1644 | intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); | |
1645 | out_free_rx_ring: | |
1646 | bcm_sysport_fini_rx_ring(priv); | |
1647 | out_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); | |
1651 | out_free_irq0: | |
1652 | free_irq(priv->irq0, dev); | |
1653 | out_phy_disconnect: | |
1654 | phy_disconnect(priv->phydev); | |
1655 | return ret; | |
1656 | } | |
1657 | ||
b02e6d9b | 1658 | static 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 | ||
1674 | static 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 | ||
1717 | static 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 | ||
1733 | static 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 | ||
1748 | static 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; | |
1857 | err: | |
1858 | free_netdev(dev); | |
1859 | return ret; | |
1860 | } | |
1861 | ||
1862 | static 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 |
1877 | static 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 |
1920 | static 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 | ||
1982 | static 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 | ||
2065 | out_free_rx_ring: | |
2066 | bcm_sysport_fini_rx_ring(priv); | |
2067 | out_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 | ||
2074 | static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, | |
2075 | bcm_sysport_suspend, bcm_sysport_resume); | |
2076 | ||
80105bef FF |
2077 | static const struct of_device_id bcm_sysport_of_match[] = { |
2078 | { .compatible = "brcm,systemport-v1.00" }, | |
2079 | { .compatible = "brcm,systemport" }, | |
2080 | { /* sentinel */ } | |
2081 | }; | |
46d5a343 | 2082 | MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); |
80105bef FF |
2083 | |
2084 | static 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 | }; | |
2093 | module_platform_driver(bcm_sysport_driver); | |
2094 | ||
2095 | MODULE_AUTHOR("Broadcom Corporation"); | |
2096 | MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver"); | |
2097 | MODULE_ALIAS("platform:brcm-systemport"); | |
2098 | MODULE_LICENSE("GPL"); |