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macvtap: make sure neighbour code can push ethernet header
[linux-2.6-block.git] / drivers / net / ethernet / broadcom / genet / bcmgenet.c
CommitLineData
1c1008c7
FF		 1/*
2 * Broadcom GENET (Gigabit Ethernet) controller 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.
1c1008c7
FF		 9 */
10
11#define pr_fmt(fmt) "bcmgenet: " fmt
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/sched.h>
16#include <linux/types.h>
17#include <linux/fcntl.h>
18#include <linux/interrupt.h>
19#include <linux/string.h>
20#include <linux/if_ether.h>
21#include <linux/init.h>
22#include <linux/errno.h>
23#include <linux/delay.h>
24#include <linux/platform_device.h>
25#include <linux/dma-mapping.h>
26#include <linux/pm.h>
27#include <linux/clk.h>
1c1008c7
FF		 28#include <linux/of.h>
29#include <linux/of_address.h>
30#include <linux/of_irq.h>
31#include <linux/of_net.h>
32#include <linux/of_platform.h>
33#include <net/arp.h>
34
35#include <linux/mii.h>
36#include <linux/ethtool.h>
37#include <linux/netdevice.h>
38#include <linux/inetdevice.h>
39#include <linux/etherdevice.h>
40#include <linux/skbuff.h>
41#include <linux/in.h>
42#include <linux/ip.h>
43#include <linux/ipv6.h>
44#include <linux/phy.h>
b0ba512e 45#include <linux/platform_data/bcmgenet.h>
1c1008c7
FF		 46
47#include <asm/unaligned.h>
48
49#include "bcmgenet.h"
50
51/* Maximum number of hardware queues, downsized if needed */
52#define GENET_MAX_MQ_CNT 4
53
54/* Default highest priority queue for multi queue support */
55#define GENET_Q0_PRIORITY 0
56
57#define GENET_DEFAULT_BD_CNT \
58 (TOTAL_DESC - priv->hw_params->tx_queues * priv->hw_params->bds_cnt)
59
60#define RX_BUF_LENGTH 2048
61#define SKB_ALIGNMENT 32
62
63/* Tx/Rx DMA register offset, skip 256 descriptors */
64#define WORDS_PER_BD(p) (p->hw_params->words_per_bd)
65#define DMA_DESC_SIZE (WORDS_PER_BD(priv) * sizeof(u32))
66
67#define GENET_TDMA_REG_OFF (priv->hw_params->tdma_offset + \
68 TOTAL_DESC * DMA_DESC_SIZE)
69
70#define GENET_RDMA_REG_OFF (priv->hw_params->rdma_offset + \
71 TOTAL_DESC * DMA_DESC_SIZE)
72
73static inline void dmadesc_set_length_status(struct bcmgenet_priv *priv,
c91b7f66 74 void __iomem *d, u32 value)
1c1008c7
FF		 75{
76 __raw_writel(value, d + DMA_DESC_LENGTH_STATUS);
77}
78
79static inline u32 dmadesc_get_length_status(struct bcmgenet_priv *priv,
c91b7f66 80 void __iomem *d)
1c1008c7
FF		 81{
82 return __raw_readl(d + DMA_DESC_LENGTH_STATUS);
83}
84
85static inline void dmadesc_set_addr(struct bcmgenet_priv *priv,
86 void __iomem *d,
87 dma_addr_t addr)
88{
89 __raw_writel(lower_32_bits(addr), d + DMA_DESC_ADDRESS_LO);
90
91 /* Register writes to GISB bus can take couple hundred nanoseconds
92 * and are done for each packet, save these expensive writes unless
7fc527f9 93 * the platform is explicitly configured for 64-bits/LPAE.
1c1008c7
FF		 94 */
95#ifdef CONFIG_PHYS_ADDR_T_64BIT
96 if (priv->hw_params->flags & GENET_HAS_40BITS)
97 __raw_writel(upper_32_bits(addr), d + DMA_DESC_ADDRESS_HI);
98#endif
99}
100
101/* Combined address + length/status setter */
102static inline void dmadesc_set(struct bcmgenet_priv *priv,
c91b7f66 103 void __iomem *d, dma_addr_t addr, u32 val)
1c1008c7
FF		 104{
105 dmadesc_set_length_status(priv, d, val);
106 dmadesc_set_addr(priv, d, addr);
107}
108
109static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv,
110 void __iomem *d)
111{
112 dma_addr_t addr;
113
114 addr = __raw_readl(d + DMA_DESC_ADDRESS_LO);
115
116 /* Register writes to GISB bus can take couple hundred nanoseconds
117 * and are done for each packet, save these expensive writes unless
7fc527f9 118 * the platform is explicitly configured for 64-bits/LPAE.
1c1008c7
FF		 119 */
120#ifdef CONFIG_PHYS_ADDR_T_64BIT
121 if (priv->hw_params->flags & GENET_HAS_40BITS)
122 addr |= (u64)__raw_readl(d + DMA_DESC_ADDRESS_HI) << 32;
123#endif
124 return addr;
125}
126
127#define GENET_VER_FMT "%1d.%1d EPHY: 0x%04x"
128
129#define GENET_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
130 NETIF_MSG_LINK)
131
132static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv)
133{
134 if (GENET_IS_V1(priv))
135 return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1);
136 else
137 return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL);
138}
139
140static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
141{
142 if (GENET_IS_V1(priv))
143 bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1);
144 else
145 bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL);
146}
147
148/* These macros are defined to deal with register map change
149 * between GENET1.1 and GENET2. Only those currently being used
150 * by driver are defined.
151 */
152static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv)
153{
154 if (GENET_IS_V1(priv))
155 return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1);
156 else
157 return __raw_readl(priv->base +
158 priv->hw_params->tbuf_offset + TBUF_CTRL);
159}
160
161static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
162{
163 if (GENET_IS_V1(priv))
164 bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1);
165 else
166 __raw_writel(val, priv->base +
167 priv->hw_params->tbuf_offset + TBUF_CTRL);
168}
169
170static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv)
171{
172 if (GENET_IS_V1(priv))
173 return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1);
174 else
175 return __raw_readl(priv->base +
176 priv->hw_params->tbuf_offset + TBUF_BP_MC);
177}
178
179static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val)
180{
181 if (GENET_IS_V1(priv))
182 bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1);
183 else
184 __raw_writel(val, priv->base +
185 priv->hw_params->tbuf_offset + TBUF_BP_MC);
186}
187
188/* RX/TX DMA register accessors */
189enum dma_reg {
190 DMA_RING_CFG = 0,
191 DMA_CTRL,
192 DMA_STATUS,
193 DMA_SCB_BURST_SIZE,
194 DMA_ARB_CTRL,
37742166
PG		 195 DMA_PRIORITY_0,
196 DMA_PRIORITY_1,
197 DMA_PRIORITY_2,
1c1008c7
FF		 198};
199
200static const u8 bcmgenet_dma_regs_v3plus[] = {
201 [DMA_RING_CFG] = 0x00,
202 [DMA_CTRL] = 0x04,
203 [DMA_STATUS] = 0x08,
204 [DMA_SCB_BURST_SIZE] = 0x0C,
205 [DMA_ARB_CTRL] = 0x2C,
37742166
PG		 206 [DMA_PRIORITY_0] = 0x30,
207 [DMA_PRIORITY_1] = 0x34,
208 [DMA_PRIORITY_2] = 0x38,
1c1008c7
FF		 209};
210
211static const u8 bcmgenet_dma_regs_v2[] = {
212 [DMA_RING_CFG] = 0x00,
213 [DMA_CTRL] = 0x04,
214 [DMA_STATUS] = 0x08,
215 [DMA_SCB_BURST_SIZE] = 0x0C,
216 [DMA_ARB_CTRL] = 0x30,
37742166
PG		 217 [DMA_PRIORITY_0] = 0x34,
218 [DMA_PRIORITY_1] = 0x38,
219 [DMA_PRIORITY_2] = 0x3C,
1c1008c7
FF		 220};
221
222static const u8 bcmgenet_dma_regs_v1[] = {
223 [DMA_CTRL] = 0x00,
224 [DMA_STATUS] = 0x04,
225 [DMA_SCB_BURST_SIZE] = 0x0C,
226 [DMA_ARB_CTRL] = 0x30,
37742166
PG		 227 [DMA_PRIORITY_0] = 0x34,
228 [DMA_PRIORITY_1] = 0x38,
229 [DMA_PRIORITY_2] = 0x3C,
1c1008c7
FF		 230};
231
232/* Set at runtime once bcmgenet version is known */
233static const u8 *bcmgenet_dma_regs;
234
235static inline struct bcmgenet_priv *dev_to_priv(struct device *dev)
236{
237 return netdev_priv(dev_get_drvdata(dev));
238}
239
240static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv,
c91b7f66 241 enum dma_reg r)
1c1008c7
FF		 242{
243 return __raw_readl(priv->base + GENET_TDMA_REG_OFF +
244 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
245}
246
247static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv,
248 u32 val, enum dma_reg r)
249{
250 __raw_writel(val, priv->base + GENET_TDMA_REG_OFF +
251 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
252}
253
254static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv,
c91b7f66 255 enum dma_reg r)
1c1008c7
FF		 256{
257 return __raw_readl(priv->base + GENET_RDMA_REG_OFF +
258 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
259}
260
261static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv,
262 u32 val, enum dma_reg r)
263{
264 __raw_writel(val, priv->base + GENET_RDMA_REG_OFF +
265 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
266}
267
268/* RDMA/TDMA ring registers and accessors
269 * we merge the common fields and just prefix with T/D the registers
270 * having different meaning depending on the direction
271 */
272enum dma_ring_reg {
273 TDMA_READ_PTR = 0,
274 RDMA_WRITE_PTR = TDMA_READ_PTR,
275 TDMA_READ_PTR_HI,
276 RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI,
277 TDMA_CONS_INDEX,
278 RDMA_PROD_INDEX = TDMA_CONS_INDEX,
279 TDMA_PROD_INDEX,
280 RDMA_CONS_INDEX = TDMA_PROD_INDEX,
281 DMA_RING_BUF_SIZE,
282 DMA_START_ADDR,
283 DMA_START_ADDR_HI,
284 DMA_END_ADDR,
285 DMA_END_ADDR_HI,
286 DMA_MBUF_DONE_THRESH,
287 TDMA_FLOW_PERIOD,
288 RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD,
289 TDMA_WRITE_PTR,
290 RDMA_READ_PTR = TDMA_WRITE_PTR,
291 TDMA_WRITE_PTR_HI,
292 RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI
293};
294
295/* GENET v4 supports 40-bits pointer addressing
296 * for obvious reasons the LO and HI word parts
297 * are contiguous, but this offsets the other
298 * registers.
299 */
300static const u8 genet_dma_ring_regs_v4[] = {
301 [TDMA_READ_PTR] = 0x00,
302 [TDMA_READ_PTR_HI] = 0x04,
303 [TDMA_CONS_INDEX] = 0x08,
304 [TDMA_PROD_INDEX] = 0x0C,
305 [DMA_RING_BUF_SIZE] = 0x10,
306 [DMA_START_ADDR] = 0x14,
307 [DMA_START_ADDR_HI] = 0x18,
308 [DMA_END_ADDR] = 0x1C,
309 [DMA_END_ADDR_HI] = 0x20,
310 [DMA_MBUF_DONE_THRESH] = 0x24,
311 [TDMA_FLOW_PERIOD] = 0x28,
312 [TDMA_WRITE_PTR] = 0x2C,
313 [TDMA_WRITE_PTR_HI] = 0x30,
314};
315
316static const u8 genet_dma_ring_regs_v123[] = {
317 [TDMA_READ_PTR] = 0x00,
318 [TDMA_CONS_INDEX] = 0x04,
319 [TDMA_PROD_INDEX] = 0x08,
320 [DMA_RING_BUF_SIZE] = 0x0C,
321 [DMA_START_ADDR] = 0x10,
322 [DMA_END_ADDR] = 0x14,
323 [DMA_MBUF_DONE_THRESH] = 0x18,
324 [TDMA_FLOW_PERIOD] = 0x1C,
325 [TDMA_WRITE_PTR] = 0x20,
326};
327
328/* Set at runtime once GENET version is known */
329static const u8 *genet_dma_ring_regs;
330
331static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv,
c91b7f66
FF		 332 unsigned int ring,
333 enum dma_ring_reg r)
1c1008c7
FF		 334{
335 return __raw_readl(priv->base + GENET_TDMA_REG_OFF +
336 (DMA_RING_SIZE * ring) +
337 genet_dma_ring_regs[r]);
338}
339
340static inline void bcmgenet_tdma_ring_writel(struct bcmgenet_priv *priv,
c91b7f66
FF		 341 unsigned int ring, u32 val,
342 enum dma_ring_reg r)
1c1008c7
FF		 343{
344 __raw_writel(val, priv->base + GENET_TDMA_REG_OFF +
345 (DMA_RING_SIZE * ring) +
346 genet_dma_ring_regs[r]);
347}
348
349static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv,
c91b7f66
FF		 350 unsigned int ring,
351 enum dma_ring_reg r)
1c1008c7
FF		 352{
353 return __raw_readl(priv->base + GENET_RDMA_REG_OFF +
354 (DMA_RING_SIZE * ring) +
355 genet_dma_ring_regs[r]);
356}
357
358static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv,
c91b7f66
FF		 359 unsigned int ring, u32 val,
360 enum dma_ring_reg r)
1c1008c7
FF		 361{
362 __raw_writel(val, priv->base + GENET_RDMA_REG_OFF +
363 (DMA_RING_SIZE * ring) +
364 genet_dma_ring_regs[r]);
365}
366
367static int bcmgenet_get_settings(struct net_device *dev,
c91b7f66 368 struct ethtool_cmd *cmd)
1c1008c7
FF		 369{
370 struct bcmgenet_priv *priv = netdev_priv(dev);
371
372 if (!netif_running(dev))
373 return -EINVAL;
374
375 if (!priv->phydev)
376 return -ENODEV;
377
378 return phy_ethtool_gset(priv->phydev, cmd);
379}
380
381static int bcmgenet_set_settings(struct net_device *dev,
c91b7f66 382 struct ethtool_cmd *cmd)
1c1008c7
FF		 383{
384 struct bcmgenet_priv *priv = netdev_priv(dev);
385
386 if (!netif_running(dev))
387 return -EINVAL;
388
389 if (!priv->phydev)
390 return -ENODEV;
391
392 return phy_ethtool_sset(priv->phydev, cmd);
393}
394
395static int bcmgenet_set_rx_csum(struct net_device *dev,
396 netdev_features_t wanted)
397{
398 struct bcmgenet_priv *priv = netdev_priv(dev);
399 u32 rbuf_chk_ctrl;
400 bool rx_csum_en;
401
402 rx_csum_en = !!(wanted & NETIF_F_RXCSUM);
403
404 rbuf_chk_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL);
405
406 /* enable rx checksumming */
407 if (rx_csum_en)
408 rbuf_chk_ctrl |= RBUF_RXCHK_EN;
409 else
410 rbuf_chk_ctrl &= ~RBUF_RXCHK_EN;
411 priv->desc_rxchk_en = rx_csum_en;
ebe5e3c6
FF		 412
413 /* If UniMAC forwards CRC, we need to skip over it to get
414 * a valid CHK bit to be set in the per-packet status word
415 */
416 if (rx_csum_en && priv->crc_fwd_en)
417 rbuf_chk_ctrl |= RBUF_SKIP_FCS;
418 else
419 rbuf_chk_ctrl &= ~RBUF_SKIP_FCS;
420
1c1008c7
FF		 421 bcmgenet_rbuf_writel(priv, rbuf_chk_ctrl, RBUF_CHK_CTRL);
422
423 return 0;
424}
425
426static int bcmgenet_set_tx_csum(struct net_device *dev,
427 netdev_features_t wanted)
428{
429 struct bcmgenet_priv *priv = netdev_priv(dev);
430 bool desc_64b_en;
431 u32 tbuf_ctrl, rbuf_ctrl;
432
433 tbuf_ctrl = bcmgenet_tbuf_ctrl_get(priv);
434 rbuf_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
435
436 desc_64b_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
437
438 /* enable 64 bytes descriptor in both directions (RBUF and TBUF) */
439 if (desc_64b_en) {
440 tbuf_ctrl |= RBUF_64B_EN;
441 rbuf_ctrl |= RBUF_64B_EN;
442 } else {
443 tbuf_ctrl &= ~RBUF_64B_EN;
444 rbuf_ctrl &= ~RBUF_64B_EN;
445 }
446 priv->desc_64b_en = desc_64b_en;
447
448 bcmgenet_tbuf_ctrl_set(priv, tbuf_ctrl);
449 bcmgenet_rbuf_writel(priv, rbuf_ctrl, RBUF_CTRL);
450
451 return 0;
452}
453
454static int bcmgenet_set_features(struct net_device *dev,
c91b7f66 455 netdev_features_t features)
1c1008c7
FF		 456{
457 netdev_features_t changed = features ^ dev->features;
458 netdev_features_t wanted = dev->wanted_features;
459 int ret = 0;
460
461 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
462 ret = bcmgenet_set_tx_csum(dev, wanted);
463 if (changed & (NETIF_F_RXCSUM))
464 ret = bcmgenet_set_rx_csum(dev, wanted);
465
466 return ret;
467}
468
469static u32 bcmgenet_get_msglevel(struct net_device *dev)
470{
471 struct bcmgenet_priv *priv = netdev_priv(dev);
472
473 return priv->msg_enable;
474}
475
476static void bcmgenet_set_msglevel(struct net_device *dev, u32 level)
477{
478 struct bcmgenet_priv *priv = netdev_priv(dev);
479
480 priv->msg_enable = level;
481}
482
483/* standard ethtool support functions. */
484enum bcmgenet_stat_type {
485 BCMGENET_STAT_NETDEV = -1,
486 BCMGENET_STAT_MIB_RX,
487 BCMGENET_STAT_MIB_TX,
488 BCMGENET_STAT_RUNT,
489 BCMGENET_STAT_MISC,
490};
491
492struct bcmgenet_stats {
493 char stat_string[ETH_GSTRING_LEN];
494 int stat_sizeof;
495 int stat_offset;
496 enum bcmgenet_stat_type type;
497 /* reg offset from UMAC base for misc counters */
498 u16 reg_offset;
499};
500
501#define STAT_NETDEV(m) { \
502 .stat_string = __stringify(m), \
503 .stat_sizeof = sizeof(((struct net_device_stats *)0)->m), \
504 .stat_offset = offsetof(struct net_device_stats, m), \
505 .type = BCMGENET_STAT_NETDEV, \
506}
507
508#define STAT_GENET_MIB(str, m, _type) { \
509 .stat_string = str, \
510 .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
511 .stat_offset = offsetof(struct bcmgenet_priv, m), \
512 .type = _type, \
513}
514
515#define STAT_GENET_MIB_RX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_RX)
516#define STAT_GENET_MIB_TX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_TX)
517#define STAT_GENET_RUNT(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_RUNT)
518
519#define STAT_GENET_MISC(str, m, offset) { \
520 .stat_string = str, \
521 .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
522 .stat_offset = offsetof(struct bcmgenet_priv, m), \
523 .type = BCMGENET_STAT_MISC, \
524 .reg_offset = offset, \
525}
526
527
528/* There is a 0xC gap between the end of RX and beginning of TX stats and then
529 * between the end of TX stats and the beginning of the RX RUNT
530 */
531#define BCMGENET_STAT_OFFSET 0xc
532
533/* Hardware counters must be kept in sync because the order/offset
534 * is important here (order in structure declaration = order in hardware)
535 */
536static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
537 /* general stats */
538 STAT_NETDEV(rx_packets),
539 STAT_NETDEV(tx_packets),
540 STAT_NETDEV(rx_bytes),
541 STAT_NETDEV(tx_bytes),
542 STAT_NETDEV(rx_errors),
543 STAT_NETDEV(tx_errors),
544 STAT_NETDEV(rx_dropped),
545 STAT_NETDEV(tx_dropped),
546 STAT_NETDEV(multicast),
547 /* UniMAC RSV counters */
548 STAT_GENET_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
549 STAT_GENET_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
550 STAT_GENET_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
551 STAT_GENET_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
552 STAT_GENET_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
553 STAT_GENET_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
554 STAT_GENET_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
555 STAT_GENET_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
556 STAT_GENET_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
557 STAT_GENET_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
558 STAT_GENET_MIB_RX("rx_pkts", mib.rx.pkt),
559 STAT_GENET_MIB_RX("rx_bytes", mib.rx.bytes),
560 STAT_GENET_MIB_RX("rx_multicast", mib.rx.mca),
561 STAT_GENET_MIB_RX("rx_broadcast", mib.rx.bca),
562 STAT_GENET_MIB_RX("rx_fcs", mib.rx.fcs),
563 STAT_GENET_MIB_RX("rx_control", mib.rx.cf),
564 STAT_GENET_MIB_RX("rx_pause", mib.rx.pf),
565 STAT_GENET_MIB_RX("rx_unknown", mib.rx.uo),
566 STAT_GENET_MIB_RX("rx_align", mib.rx.aln),
567 STAT_GENET_MIB_RX("rx_outrange", mib.rx.flr),
568 STAT_GENET_MIB_RX("rx_code", mib.rx.cde),
569 STAT_GENET_MIB_RX("rx_carrier", mib.rx.fcr),
570 STAT_GENET_MIB_RX("rx_oversize", mib.rx.ovr),
571 STAT_GENET_MIB_RX("rx_jabber", mib.rx.jbr),
572 STAT_GENET_MIB_RX("rx_mtu_err", mib.rx.mtue),
573 STAT_GENET_MIB_RX("rx_good_pkts", mib.rx.pok),
574 STAT_GENET_MIB_RX("rx_unicast", mib.rx.uc),
575 STAT_GENET_MIB_RX("rx_ppp", mib.rx.ppp),
576 STAT_GENET_MIB_RX("rx_crc", mib.rx.rcrc),
577 /* UniMAC TSV counters */
578 STAT_GENET_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
579 STAT_GENET_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
580 STAT_GENET_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
581 STAT_GENET_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
582 STAT_GENET_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
583 STAT_GENET_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
584 STAT_GENET_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
585 STAT_GENET_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
586 STAT_GENET_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
587 STAT_GENET_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
588 STAT_GENET_MIB_TX("tx_pkts", mib.tx.pkts),
589 STAT_GENET_MIB_TX("tx_multicast", mib.tx.mca),
590 STAT_GENET_MIB_TX("tx_broadcast", mib.tx.bca),
591 STAT_GENET_MIB_TX("tx_pause", mib.tx.pf),
592 STAT_GENET_MIB_TX("tx_control", mib.tx.cf),
593 STAT_GENET_MIB_TX("tx_fcs_err", mib.tx.fcs),
594 STAT_GENET_MIB_TX("tx_oversize", mib.tx.ovr),
595 STAT_GENET_MIB_TX("tx_defer", mib.tx.drf),
596 STAT_GENET_MIB_TX("tx_excess_defer", mib.tx.edf),
597 STAT_GENET_MIB_TX("tx_single_col", mib.tx.scl),
598 STAT_GENET_MIB_TX("tx_multi_col", mib.tx.mcl),
599 STAT_GENET_MIB_TX("tx_late_col", mib.tx.lcl),
600 STAT_GENET_MIB_TX("tx_excess_col", mib.tx.ecl),
601 STAT_GENET_MIB_TX("tx_frags", mib.tx.frg),
602 STAT_GENET_MIB_TX("tx_total_col", mib.tx.ncl),
603 STAT_GENET_MIB_TX("tx_jabber", mib.tx.jbr),
604 STAT_GENET_MIB_TX("tx_bytes", mib.tx.bytes),
605 STAT_GENET_MIB_TX("tx_good_pkts", mib.tx.pok),
606 STAT_GENET_MIB_TX("tx_unicast", mib.tx.uc),
607 /* UniMAC RUNT counters */
608 STAT_GENET_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
609 STAT_GENET_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
610 STAT_GENET_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
611 STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
612 /* Misc UniMAC counters */
613 STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt,
614 UMAC_RBUF_OVFL_CNT),
615 STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt, UMAC_RBUF_ERR_CNT),
616 STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT),
44c8bc3c
FF		 617 STAT_GENET_MIB_RX("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
618 STAT_GENET_MIB_RX("rx_dma_failed", mib.rx_dma_failed),
619 STAT_GENET_MIB_TX("tx_dma_failed", mib.tx_dma_failed),
1c1008c7
FF		 620};
621
622#define BCMGENET_STATS_LEN ARRAY_SIZE(bcmgenet_gstrings_stats)
623
624static void bcmgenet_get_drvinfo(struct net_device *dev,
c91b7f66 625 struct ethtool_drvinfo *info)
1c1008c7
FF		 626{
627 strlcpy(info->driver, "bcmgenet", sizeof(info->driver));
628 strlcpy(info->version, "v2.0", sizeof(info->version));
629 info->n_stats = BCMGENET_STATS_LEN;
1c1008c7
FF		 630}
631
632static int bcmgenet_get_sset_count(struct net_device *dev, int string_set)
633{
634 switch (string_set) {
635 case ETH_SS_STATS:
636 return BCMGENET_STATS_LEN;
637 default:
638 return -EOPNOTSUPP;
639 }
640}
641
c91b7f66
FF		 642static void bcmgenet_get_strings(struct net_device *dev, u32 stringset,
643 u8 *data)
1c1008c7
FF		 644{
645 int i;
646
647 switch (stringset) {
648 case ETH_SS_STATS:
649 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
650 memcpy(data + i * ETH_GSTRING_LEN,
c91b7f66
FF		 651 bcmgenet_gstrings_stats[i].stat_string,
652 ETH_GSTRING_LEN);
1c1008c7
FF		 653 }
654 break;
655 }
656}
657
658static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
659{
660 int i, j = 0;
661
662 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
663 const struct bcmgenet_stats *s;
664 u8 offset = 0;
665 u32 val = 0;
666 char *p;
667
668 s = &bcmgenet_gstrings_stats[i];
669 switch (s->type) {
670 case BCMGENET_STAT_NETDEV:
671 continue;
672 case BCMGENET_STAT_MIB_RX:
673 case BCMGENET_STAT_MIB_TX:
674 case BCMGENET_STAT_RUNT:
675 if (s->type != BCMGENET_STAT_MIB_RX)
676 offset = BCMGENET_STAT_OFFSET;
c91b7f66
FF		 677 val = bcmgenet_umac_readl(priv,
678 UMAC_MIB_START + j + offset);
1c1008c7
FF		 679 break;
680 case BCMGENET_STAT_MISC:
681 val = bcmgenet_umac_readl(priv, s->reg_offset);
682 /* clear if overflowed */
683 if (val == ~0)
684 bcmgenet_umac_writel(priv, 0, s->reg_offset);
685 break;
686 }
687
688 j += s->stat_sizeof;
689 p = (char *)priv + s->stat_offset;
690 *(u32 *)p = val;
691 }
692}
693
694static void bcmgenet_get_ethtool_stats(struct net_device *dev,
c91b7f66
FF		 695 struct ethtool_stats *stats,
696 u64 *data)
1c1008c7
FF		 697{
698 struct bcmgenet_priv *priv = netdev_priv(dev);
699 int i;
700
701 if (netif_running(dev))
702 bcmgenet_update_mib_counters(priv);
703
704 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
705 const struct bcmgenet_stats *s;
706 char *p;
707
708 s = &bcmgenet_gstrings_stats[i];
709 if (s->type == BCMGENET_STAT_NETDEV)
710 p = (char *)&dev->stats;
711 else
712 p = (char *)priv;
713 p += s->stat_offset;
714 data[i] = *(u32 *)p;
715 }
716}
717
6ef398ea
FF		 718static void bcmgenet_eee_enable_set(struct net_device *dev, bool enable)
719{
720 struct bcmgenet_priv *priv = netdev_priv(dev);
721 u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL;
722 u32 reg;
723
724 if (enable && !priv->clk_eee_enabled) {
725 clk_prepare_enable(priv->clk_eee);
726 priv->clk_eee_enabled = true;
727 }
728
729 reg = bcmgenet_umac_readl(priv, UMAC_EEE_CTRL);
730 if (enable)
731 reg |= EEE_EN;
732 else
733 reg &= ~EEE_EN;
734 bcmgenet_umac_writel(priv, reg, UMAC_EEE_CTRL);
735
736 /* Enable EEE and switch to a 27Mhz clock automatically */
737 reg = __raw_readl(priv->base + off);
738 if (enable)
739 reg |= TBUF_EEE_EN | TBUF_PM_EN;
740 else
741 reg &= ~(TBUF_EEE_EN | TBUF_PM_EN);
742 __raw_writel(reg, priv->base + off);
743
744 /* Do the same for thing for RBUF */
745 reg = bcmgenet_rbuf_readl(priv, RBUF_ENERGY_CTRL);
746 if (enable)
747 reg |= RBUF_EEE_EN | RBUF_PM_EN;
748 else
749 reg &= ~(RBUF_EEE_EN | RBUF_PM_EN);
750 bcmgenet_rbuf_writel(priv, reg, RBUF_ENERGY_CTRL);
751
752 if (!enable && priv->clk_eee_enabled) {
753 clk_disable_unprepare(priv->clk_eee);
754 priv->clk_eee_enabled = false;
755 }
756
757 priv->eee.eee_enabled = enable;
758 priv->eee.eee_active = enable;
759}
760
761static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_eee *e)
762{
763 struct bcmgenet_priv *priv = netdev_priv(dev);
764 struct ethtool_eee *p = &priv->eee;
765
766 if (GENET_IS_V1(priv))
767 return -EOPNOTSUPP;
768
769 e->eee_enabled = p->eee_enabled;
770 e->eee_active = p->eee_active;
771 e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
772
773 return phy_ethtool_get_eee(priv->phydev, e);
774}
775
776static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_eee *e)
777{
778 struct bcmgenet_priv *priv = netdev_priv(dev);
779 struct ethtool_eee *p = &priv->eee;
780 int ret = 0;
781
782 if (GENET_IS_V1(priv))
783 return -EOPNOTSUPP;
784
785 p->eee_enabled = e->eee_enabled;
786
787 if (!p->eee_enabled) {
788 bcmgenet_eee_enable_set(dev, false);
789 } else {
790 ret = phy_init_eee(priv->phydev, 0);
791 if (ret) {
792 netif_err(priv, hw, dev, "EEE initialization failed\n");
793 return ret;
794 }
795
796 bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER);
797 bcmgenet_eee_enable_set(dev, true);
798 }
799
800 return phy_ethtool_set_eee(priv->phydev, e);
801}
802
6b0c5406
FF		 803static int bcmgenet_nway_reset(struct net_device *dev)
804{
805 struct bcmgenet_priv *priv = netdev_priv(dev);
806
807 return genphy_restart_aneg(priv->phydev);
808}
809
1c1008c7
FF		 810/* standard ethtool support functions. */
811static struct ethtool_ops bcmgenet_ethtool_ops = {
812 .get_strings = bcmgenet_get_strings,
813 .get_sset_count = bcmgenet_get_sset_count,
814 .get_ethtool_stats = bcmgenet_get_ethtool_stats,
815 .get_settings = bcmgenet_get_settings,
816 .set_settings = bcmgenet_set_settings,
817 .get_drvinfo = bcmgenet_get_drvinfo,
818 .get_link = ethtool_op_get_link,
819 .get_msglevel = bcmgenet_get_msglevel,
820 .set_msglevel = bcmgenet_set_msglevel,
06ba8375
FF		 821 .get_wol = bcmgenet_get_wol,
822 .set_wol = bcmgenet_set_wol,
6ef398ea
FF		 823 .get_eee = bcmgenet_get_eee,
824 .set_eee = bcmgenet_set_eee,
6b0c5406 825 .nway_reset = bcmgenet_nway_reset,
1c1008c7
FF		 826};
827
828/* Power down the unimac, based on mode. */
829static void bcmgenet_power_down(struct bcmgenet_priv *priv,
830 enum bcmgenet_power_mode mode)
831{
832 u32 reg;
833
834 switch (mode) {
835 case GENET_POWER_CABLE_SENSE:
80d8e96d 836 phy_detach(priv->phydev);
1c1008c7
FF		 837 break;
838
c3ae64ae
FF		 839 case GENET_POWER_WOL_MAGIC:
840 bcmgenet_wol_power_down_cfg(priv, mode);
841 break;
842
1c1008c7
FF		 843 case GENET_POWER_PASSIVE:
844 /* Power down LED */
1c1008c7
FF		 845 if (priv->hw_params->flags & GENET_HAS_EXT) {
846 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
847 reg |= (EXT_PWR_DOWN_PHY |
848 EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS);
849 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
850 }
851 break;
852 default:
853 break;
854 }
855}
856
857static void bcmgenet_power_up(struct bcmgenet_priv *priv,
c91b7f66 858 enum bcmgenet_power_mode mode)
1c1008c7
FF		 859{
860 u32 reg;
861
862 if (!(priv->hw_params->flags & GENET_HAS_EXT))
863 return;
864
865 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
866
867 switch (mode) {
868 case GENET_POWER_PASSIVE:
869 reg &= ~(EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_PHY |
870 EXT_PWR_DOWN_BIAS);
871 /* fallthrough */
872 case GENET_POWER_CABLE_SENSE:
873 /* enable APD */
874 reg |= EXT_PWR_DN_EN_LD;
875 break;
c3ae64ae
FF		 876 case GENET_POWER_WOL_MAGIC:
877 bcmgenet_wol_power_up_cfg(priv, mode);
878 return;
1c1008c7
FF		 879 default:
880 break;
881 }
882
883 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
cc013fb4
FF		 884
885 if (mode == GENET_POWER_PASSIVE)
886 bcmgenet_mii_reset(priv->dev);
1c1008c7
FF		 887}
888
889/* ioctl handle special commands that are not present in ethtool. */
890static int bcmgenet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
891{
892 struct bcmgenet_priv *priv = netdev_priv(dev);
893 int val = 0;
894
895 if (!netif_running(dev))
896 return -EINVAL;
897
898 switch (cmd) {
899 case SIOCGMIIPHY:
900 case SIOCGMIIREG:
901 case SIOCSMIIREG:
902 if (!priv->phydev)
903 val = -ENODEV;
904 else
905 val = phy_mii_ioctl(priv->phydev, rq, cmd);
906 break;
907
908 default:
909 val = -EINVAL;
910 break;
911 }
912
913 return val;
914}
915
916static struct enet_cb *bcmgenet_get_txcb(struct bcmgenet_priv *priv,
917 struct bcmgenet_tx_ring *ring)
918{
919 struct enet_cb *tx_cb_ptr;
920
921 tx_cb_ptr = ring->cbs;
922 tx_cb_ptr += ring->write_ptr - ring->cb_ptr;
923 tx_cb_ptr->bd_addr = priv->tx_bds + ring->write_ptr * DMA_DESC_SIZE;
924 /* Advancing local write pointer */
925 if (ring->write_ptr == ring->end_ptr)
926 ring->write_ptr = ring->cb_ptr;
927 else
928 ring->write_ptr++;
929
930 return tx_cb_ptr;
931}
932
933/* Simple helper to free a control block's resources */
934static void bcmgenet_free_cb(struct enet_cb *cb)
935{
936 dev_kfree_skb_any(cb->skb);
937 cb->skb = NULL;
938 dma_unmap_addr_set(cb, dma_addr, 0);
939}
940
941static inline void bcmgenet_tx_ring16_int_disable(struct bcmgenet_priv *priv,
942 struct bcmgenet_tx_ring *ring)
943{
944 bcmgenet_intrl2_0_writel(priv,
c91b7f66
FF		 945 UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE,
946 INTRL2_CPU_MASK_SET);
1c1008c7
FF		 947}
948
949static inline void bcmgenet_tx_ring16_int_enable(struct bcmgenet_priv *priv,
950 struct bcmgenet_tx_ring *ring)
951{
952 bcmgenet_intrl2_0_writel(priv,
c91b7f66
FF		 953 UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE,
954 INTRL2_CPU_MASK_CLEAR);
1c1008c7
FF		 955}
956
957static inline void bcmgenet_tx_ring_int_enable(struct bcmgenet_priv *priv,
c91b7f66 958 struct bcmgenet_tx_ring *ring)
1c1008c7 959{
c91b7f66
FF		 960 bcmgenet_intrl2_1_writel(priv, (1 << ring->index),
961 INTRL2_CPU_MASK_CLEAR);
1c1008c7
FF		 962 priv->int1_mask &= ~(1 << ring->index);
963}
964
965static inline void bcmgenet_tx_ring_int_disable(struct bcmgenet_priv *priv,
966 struct bcmgenet_tx_ring *ring)
967{
c91b7f66
FF		 968 bcmgenet_intrl2_1_writel(priv, (1 << ring->index),
969 INTRL2_CPU_MASK_SET);
1c1008c7
FF		 970 priv->int1_mask |= (1 << ring->index);
971}
972
973/* Unlocked version of the reclaim routine */
974static void __bcmgenet_tx_reclaim(struct net_device *dev,
c91b7f66 975 struct bcmgenet_tx_ring *ring)
1c1008c7
FF		 976{
977 struct bcmgenet_priv *priv = netdev_priv(dev);
978 int last_tx_cn, last_c_index, num_tx_bds;
979 struct enet_cb *tx_cb_ptr;
b2cde2cc 980 struct netdev_queue *txq;
478a010c 981 unsigned int bds_compl;
1c1008c7
FF		 982 unsigned int c_index;
983
7fc527f9 984 /* Compute how many buffers are transmitted since last xmit call */
1c1008c7 985 c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
b2cde2cc 986 txq = netdev_get_tx_queue(dev, ring->queue);
1c1008c7
FF		 987
988 last_c_index = ring->c_index;
989 num_tx_bds = ring->size;
990
991 c_index &= (num_tx_bds - 1);
992
993 if (c_index >= last_c_index)
994 last_tx_cn = c_index - last_c_index;
995 else
996 last_tx_cn = num_tx_bds - last_c_index + c_index;
997
998 netif_dbg(priv, tx_done, dev,
c91b7f66
FF		 999 "%s ring=%d index=%d last_tx_cn=%d last_index=%d\n",
1000 __func__, ring->index,
1001 c_index, last_tx_cn, last_c_index);
1c1008c7
FF		 1002
1003 /* Reclaim transmitted buffers */
1004 while (last_tx_cn-- > 0) {
1005 tx_cb_ptr = ring->cbs + last_c_index;
478a010c 1006 bds_compl = 0;
1c1008c7 1007 if (tx_cb_ptr->skb) {
478a010c 1008 bds_compl = skb_shinfo(tx_cb_ptr->skb)->nr_frags + 1;
1c1008c7
FF		 1009 dev->stats.tx_bytes += tx_cb_ptr->skb->len;
1010 dma_unmap_single(&dev->dev,
c91b7f66
FF		 1011 dma_unmap_addr(tx_cb_ptr, dma_addr),
1012 tx_cb_ptr->skb->len,
1013 DMA_TO_DEVICE);
1c1008c7
FF		 1014 bcmgenet_free_cb(tx_cb_ptr);
1015 } else if (dma_unmap_addr(tx_cb_ptr, dma_addr)) {
1016 dev->stats.tx_bytes +=
1017 dma_unmap_len(tx_cb_ptr, dma_len);
1018 dma_unmap_page(&dev->dev,
c91b7f66
FF		 1019 dma_unmap_addr(tx_cb_ptr, dma_addr),
1020 dma_unmap_len(tx_cb_ptr, dma_len),
1021 DMA_TO_DEVICE);
1c1008c7
FF		 1022 dma_unmap_addr_set(tx_cb_ptr, dma_addr, 0);
1023 }
1024 dev->stats.tx_packets++;
478a010c 1025 ring->free_bds += bds_compl;
1c1008c7
FF		 1026
1027 last_c_index++;
1028 last_c_index &= (num_tx_bds - 1);
1029 }
1030
1031 if (ring->free_bds > (MAX_SKB_FRAGS + 1))
1032 ring->int_disable(priv, ring);
1033
b2cde2cc
FF		 1034 if (netif_tx_queue_stopped(txq))
1035 netif_tx_wake_queue(txq);
1c1008c7
FF		 1036
1037 ring->c_index = c_index;
1038}
1039
1040static void bcmgenet_tx_reclaim(struct net_device *dev,
c91b7f66 1041 struct bcmgenet_tx_ring *ring)
1c1008c7
FF		 1042{
1043 unsigned long flags;
1044
1045 spin_lock_irqsave(&ring->lock, flags);
1046 __bcmgenet_tx_reclaim(dev, ring);
1047 spin_unlock_irqrestore(&ring->lock, flags);
1048}
1049
1050static void bcmgenet_tx_reclaim_all(struct net_device *dev)
1051{
1052 struct bcmgenet_priv *priv = netdev_priv(dev);
1053 int i;
1054
1055 if (netif_is_multiqueue(dev)) {
1056 for (i = 0; i < priv->hw_params->tx_queues; i++)
1057 bcmgenet_tx_reclaim(dev, &priv->tx_rings[i]);
1058 }
1059
1060 bcmgenet_tx_reclaim(dev, &priv->tx_rings[DESC_INDEX]);
1061}
1062
1063/* Transmits a single SKB (either head of a fragment or a single SKB)
1064 * caller must hold priv->lock
1065 */
1066static int bcmgenet_xmit_single(struct net_device *dev,
1067 struct sk_buff *skb,
1068 u16 dma_desc_flags,
1069 struct bcmgenet_tx_ring *ring)
1070{
1071 struct bcmgenet_priv *priv = netdev_priv(dev);
1072 struct device *kdev = &priv->pdev->dev;
1073 struct enet_cb *tx_cb_ptr;
1074 unsigned int skb_len;
1075 dma_addr_t mapping;
1076 u32 length_status;
1077 int ret;
1078
1079 tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
1080
1081 if (unlikely(!tx_cb_ptr))
1082 BUG();
1083
1084 tx_cb_ptr->skb = skb;
1085
1086 skb_len = skb_headlen(skb) < ETH_ZLEN ? ETH_ZLEN : skb_headlen(skb);
1087
1088 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1089 ret = dma_mapping_error(kdev, mapping);
1090 if (ret) {
44c8bc3c 1091 priv->mib.tx_dma_failed++;
1c1008c7
FF		 1092 netif_err(priv, tx_err, dev, "Tx DMA map failed\n");
1093 dev_kfree_skb(skb);
1094 return ret;
1095 }
1096
1097 dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
1098 dma_unmap_len_set(tx_cb_ptr, dma_len, skb->len);
1099 length_status = (skb_len << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
1100 (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT) |
1101 DMA_TX_APPEND_CRC;
1102
1103 if (skb->ip_summed == CHECKSUM_PARTIAL)
1104 length_status |= DMA_TX_DO_CSUM;
1105
1106 dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, length_status);
1107
1108 /* Decrement total BD count and advance our write pointer */
1109 ring->free_bds -= 1;
1110 ring->prod_index += 1;
1111 ring->prod_index &= DMA_P_INDEX_MASK;
1112
1113 return 0;
1114}
1115
7fc527f9 1116/* Transmit a SKB fragment */
1c1008c7 1117static int bcmgenet_xmit_frag(struct net_device *dev,
c91b7f66
FF		 1118 skb_frag_t *frag,
1119 u16 dma_desc_flags,
1120 struct bcmgenet_tx_ring *ring)
1c1008c7
FF		 1121{
1122 struct bcmgenet_priv *priv = netdev_priv(dev);
1123 struct device *kdev = &priv->pdev->dev;
1124 struct enet_cb *tx_cb_ptr;
1125 dma_addr_t mapping;
1126 int ret;
1127
1128 tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
1129
1130 if (unlikely(!tx_cb_ptr))
1131 BUG();
1132 tx_cb_ptr->skb = NULL;
1133
1134 mapping = skb_frag_dma_map(kdev, frag, 0,
c91b7f66 1135 skb_frag_size(frag), DMA_TO_DEVICE);
1c1008c7
FF		 1136 ret = dma_mapping_error(kdev, mapping);
1137 if (ret) {
44c8bc3c 1138 priv->mib.tx_dma_failed++;
1c1008c7 1139 netif_err(priv, tx_err, dev, "%s: Tx DMA map failed\n",
c91b7f66 1140 __func__);
1c1008c7
FF		 1141 return ret;
1142 }
1143
1144 dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
1145 dma_unmap_len_set(tx_cb_ptr, dma_len, frag->size);
1146
1147 dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping,
c91b7f66
FF		 1148 (frag->size << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
1149 (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT));
1c1008c7
FF		 1150
1151
1152 ring->free_bds -= 1;
1153 ring->prod_index += 1;
1154 ring->prod_index &= DMA_P_INDEX_MASK;
1155
1156 return 0;
1157}
1158
1159/* Reallocate the SKB to put enough headroom in front of it and insert
1160 * the transmit checksum offsets in the descriptors
1161 */
bc23333b
PG		 1162static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
1163 struct sk_buff *skb)
1c1008c7
FF		 1164{
1165 struct status_64 *status = NULL;
1166 struct sk_buff *new_skb;
1167 u16 offset;
1168 u8 ip_proto;
1169 u16 ip_ver;
1170 u32 tx_csum_info;
1171
1172 if (unlikely(skb_headroom(skb) < sizeof(*status))) {
1173 /* If 64 byte status block enabled, must make sure skb has
1174 * enough headroom for us to insert 64B status block.
1175 */
1176 new_skb = skb_realloc_headroom(skb, sizeof(*status));
1177 dev_kfree_skb(skb);
1178 if (!new_skb) {
1179 dev->stats.tx_errors++;
1180 dev->stats.tx_dropped++;
bc23333b 1181 return NULL;
1c1008c7
FF		 1182 }
1183 skb = new_skb;
1184 }
1185
1186 skb_push(skb, sizeof(*status));
1187 status = (struct status_64 *)skb->data;
1188
1189 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1190 ip_ver = htons(skb->protocol);
1191 switch (ip_ver) {
1192 case ETH_P_IP:
1193 ip_proto = ip_hdr(skb)->protocol;
1194 break;
1195 case ETH_P_IPV6:
1196 ip_proto = ipv6_hdr(skb)->nexthdr;
1197 break;
1198 default:
bc23333b 1199 return skb;
1c1008c7
FF		 1200 }
1201
1202 offset = skb_checksum_start_offset(skb) - sizeof(*status);
1203 tx_csum_info = (offset << STATUS_TX_CSUM_START_SHIFT) |
1204 (offset + skb->csum_offset);
1205
1206 /* Set the length valid bit for TCP and UDP and just set
1207 * the special UDP flag for IPv4, else just set to 0.
1208 */
1209 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1210 tx_csum_info |= STATUS_TX_CSUM_LV;
1211 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
1212 tx_csum_info |= STATUS_TX_CSUM_PROTO_UDP;
8900ea57 1213 } else {
1c1008c7 1214 tx_csum_info = 0;
8900ea57 1215 }
1c1008c7
FF		 1216
1217 status->tx_csum_info = tx_csum_info;
1218 }
1219
bc23333b 1220 return skb;
1c1008c7
FF		 1221}
1222
1223static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
1224{
1225 struct bcmgenet_priv *priv = netdev_priv(dev);
1226 struct bcmgenet_tx_ring *ring = NULL;
b2cde2cc 1227 struct netdev_queue *txq;
1c1008c7
FF		 1228 unsigned long flags = 0;
1229 int nr_frags, index;
1230 u16 dma_desc_flags;
1231 int ret;
1232 int i;
1233
1234 index = skb_get_queue_mapping(skb);
1235 /* Mapping strategy:
1236 * queue_mapping = 0, unclassified, packet xmited through ring16
1237 * queue_mapping = 1, goes to ring 0. (highest priority queue
1238 * queue_mapping = 2, goes to ring 1.
1239 * queue_mapping = 3, goes to ring 2.
1240 * queue_mapping = 4, goes to ring 3.
1241 */
1242 if (index == 0)
1243 index = DESC_INDEX;
1244 else
1245 index -= 1;
1246
1c1008c7
FF		 1247 nr_frags = skb_shinfo(skb)->nr_frags;
1248 ring = &priv->tx_rings[index];
b2cde2cc 1249 txq = netdev_get_tx_queue(dev, ring->queue);
1c1008c7
FF		 1250
1251 spin_lock_irqsave(&ring->lock, flags);
1252 if (ring->free_bds <= nr_frags + 1) {
b2cde2cc 1253 netif_tx_stop_queue(txq);
1c1008c7 1254 netdev_err(dev, "%s: tx ring %d full when queue %d awake\n",
c91b7f66 1255 __func__, index, ring->queue);
1c1008c7
FF		 1256 ret = NETDEV_TX_BUSY;
1257 goto out;
1258 }
1259
474ea9ca
FF		 1260 if (skb_padto(skb, ETH_ZLEN)) {
1261 ret = NETDEV_TX_OK;
1262 goto out;
1263 }
1264
1c1008c7
FF		 1265 /* set the SKB transmit checksum */
1266 if (priv->desc_64b_en) {
bc23333b
PG		 1267 skb = bcmgenet_put_tx_csum(dev, skb);
1268 if (!skb) {
1c1008c7
FF		 1269 ret = NETDEV_TX_OK;
1270 goto out;
1271 }
1272 }
1273
1274 dma_desc_flags = DMA_SOP;
1275 if (nr_frags == 0)
1276 dma_desc_flags |= DMA_EOP;
1277
1278 /* Transmit single SKB or head of fragment list */
1279 ret = bcmgenet_xmit_single(dev, skb, dma_desc_flags, ring);
1280 if (ret) {
1281 ret = NETDEV_TX_OK;
1282 goto out;
1283 }
1284
1285 /* xmit fragment */
1286 for (i = 0; i < nr_frags; i++) {
1287 ret = bcmgenet_xmit_frag(dev,
c91b7f66
FF		 1288 &skb_shinfo(skb)->frags[i],
1289 (i == nr_frags - 1) ? DMA_EOP : 0,
1290 ring);
1c1008c7
FF		 1291 if (ret) {
1292 ret = NETDEV_TX_OK;
1293 goto out;
1294 }
1295 }
1296
d03825fb
FF		 1297 skb_tx_timestamp(skb);
1298
1c1008c7
FF		 1299 /* we kept a software copy of how much we should advance the TDMA
1300 * producer index, now write it down to the hardware
1301 */
1302 bcmgenet_tdma_ring_writel(priv, ring->index,
c91b7f66 1303 ring->prod_index, TDMA_PROD_INDEX);
1c1008c7
FF		 1304
1305 if (ring->free_bds <= (MAX_SKB_FRAGS + 1)) {
b2cde2cc 1306 netif_tx_stop_queue(txq);
1c1008c7
FF		 1307 ring->int_enable(priv, ring);
1308 }
1309
1310out:
1311 spin_unlock_irqrestore(&ring->lock, flags);
1312
1313 return ret;
1314}
1315
1316
c91b7f66 1317static int bcmgenet_rx_refill(struct bcmgenet_priv *priv, struct enet_cb *cb)
1c1008c7
FF		 1318{
1319 struct device *kdev = &priv->pdev->dev;
1320 struct sk_buff *skb;
1321 dma_addr_t mapping;
1322 int ret;
1323
c91b7f66 1324 skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT);
1c1008c7
FF		 1325 if (!skb)
1326 return -ENOMEM;
1327
1328 /* a caller did not release this control block */
1329 WARN_ON(cb->skb != NULL);
1330 cb->skb = skb;
1331 mapping = dma_map_single(kdev, skb->data,
c91b7f66 1332 priv->rx_buf_len, DMA_FROM_DEVICE);
1c1008c7
FF		 1333 ret = dma_mapping_error(kdev, mapping);
1334 if (ret) {
44c8bc3c 1335 priv->mib.rx_dma_failed++;
1c1008c7
FF		 1336 bcmgenet_free_cb(cb);
1337 netif_err(priv, rx_err, priv->dev,
c91b7f66 1338 "%s DMA map failed\n", __func__);
1c1008c7
FF		 1339 return ret;
1340 }
1341
1342 dma_unmap_addr_set(cb, dma_addr, mapping);
1343 /* assign packet, prepare descriptor, and advance pointer */
1344
1345 dmadesc_set_addr(priv, priv->rx_bd_assign_ptr, mapping);
1346
1347 /* turn on the newly assigned BD for DMA to use */
1348 priv->rx_bd_assign_index++;
1349 priv->rx_bd_assign_index &= (priv->num_rx_bds - 1);
1350
1351 priv->rx_bd_assign_ptr = priv->rx_bds +
1352 (priv->rx_bd_assign_index * DMA_DESC_SIZE);
1353
1354 return 0;
1355}
1356
1357/* bcmgenet_desc_rx - descriptor based rx process.
1358 * this could be called from bottom half, or from NAPI polling method.
1359 */
1360static unsigned int bcmgenet_desc_rx(struct bcmgenet_priv *priv,
1361 unsigned int budget)
1362{
1363 struct net_device *dev = priv->dev;
1364 struct enet_cb *cb;
1365 struct sk_buff *skb;
1366 u32 dma_length_status;
1367 unsigned long dma_flag;
1368 int len, err;
1369 unsigned int rxpktprocessed = 0, rxpkttoprocess;
1370 unsigned int p_index;
1371 unsigned int chksum_ok = 0;
1372
c91b7f66 1373 p_index = bcmgenet_rdma_ring_readl(priv, DESC_INDEX, RDMA_PROD_INDEX);
1c1008c7
FF		 1374 p_index &= DMA_P_INDEX_MASK;
1375
1376 if (p_index < priv->rx_c_index)
1377 rxpkttoprocess = (DMA_C_INDEX_MASK + 1) -
1378 priv->rx_c_index + p_index;
1379 else
1380 rxpkttoprocess = p_index - priv->rx_c_index;
1381
1382 netif_dbg(priv, rx_status, dev,
c91b7f66 1383 "RDMA: rxpkttoprocess=%d\n", rxpkttoprocess);
1c1008c7
FF		 1384
1385 while ((rxpktprocessed < rxpkttoprocess) &&
c91b7f66 1386 (rxpktprocessed < budget)) {
b629be5c
FF		 1387 cb = &priv->rx_cbs[priv->rx_read_ptr];
1388 skb = cb->skb;
1389
b629be5c
FF		 1390 /* We do not have a backing SKB, so we do not have a
1391 * corresponding DMA mapping for this incoming packet since
1392 * bcmgenet_rx_refill always either has both skb and mapping or
1393 * none.
1394 */
1395 if (unlikely(!skb)) {
1396 dev->stats.rx_dropped++;
1397 dev->stats.rx_errors++;
1398 goto refill;
1399 }
1400
1c1008c7
FF		 1401 /* Unmap the packet contents such that we can use the
1402 * RSV from the 64 bytes descriptor when enabled and save
1403 * a 32-bits register read
1404 */
1c1008c7 1405 dma_unmap_single(&dev->dev, dma_unmap_addr(cb, dma_addr),
c91b7f66 1406 priv->rx_buf_len, DMA_FROM_DEVICE);
1c1008c7
FF		 1407
1408 if (!priv->desc_64b_en) {
c91b7f66
FF		 1409 dma_length_status =
1410 dmadesc_get_length_status(priv,
1411 priv->rx_bds +
1412 (priv->rx_read_ptr *
1413 DMA_DESC_SIZE));
1c1008c7
FF		 1414 } else {
1415 struct status_64 *status;
164d4f20 1416
1c1008c7
FF		 1417 status = (struct status_64 *)skb->data;
1418 dma_length_status = status->length_status;
1419 }
1420
1421 /* DMA flags and length are still valid no matter how
1422 * we got the Receive Status Vector (64B RSB or register)
1423 */
1424 dma_flag = dma_length_status & 0xffff;
1425 len = dma_length_status >> DMA_BUFLENGTH_SHIFT;
1426
1427 netif_dbg(priv, rx_status, dev,
c91b7f66
FF		 1428 "%s:p_ind=%d c_ind=%d read_ptr=%d len_stat=0x%08x\n",
1429 __func__, p_index, priv->rx_c_index,
1430 priv->rx_read_ptr, dma_length_status);
1c1008c7 1431
1c1008c7
FF		 1432 if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
1433 netif_err(priv, rx_status, dev,
c91b7f66 1434 "dropping fragmented packet!\n");
1c1008c7
FF		 1435 dev->stats.rx_dropped++;
1436 dev->stats.rx_errors++;
1437 dev_kfree_skb_any(cb->skb);
1438 cb->skb = NULL;
1439 goto refill;
1440 }
1441 /* report errors */
1442 if (unlikely(dma_flag & (DMA_RX_CRC_ERROR |
1443 DMA_RX_OV |
1444 DMA_RX_NO |
1445 DMA_RX_LG |
1446 DMA_RX_RXER))) {
1447 netif_err(priv, rx_status, dev, "dma_flag=0x%x\n",
c91b7f66 1448 (unsigned int)dma_flag);
1c1008c7
FF		 1449 if (dma_flag & DMA_RX_CRC_ERROR)
1450 dev->stats.rx_crc_errors++;
1451 if (dma_flag & DMA_RX_OV)
1452 dev->stats.rx_over_errors++;
1453 if (dma_flag & DMA_RX_NO)
1454 dev->stats.rx_frame_errors++;
1455 if (dma_flag & DMA_RX_LG)
1456 dev->stats.rx_length_errors++;
1457 dev->stats.rx_dropped++;
1458 dev->stats.rx_errors++;
1459
1460 /* discard the packet and advance consumer index.*/
1461 dev_kfree_skb_any(cb->skb);
1462 cb->skb = NULL;
1463 goto refill;
1464 } /* error packet */
1465
1466 chksum_ok = (dma_flag & priv->dma_rx_chk_bit) &&
c91b7f66 1467 priv->desc_rxchk_en;
1c1008c7
FF		 1468
1469 skb_put(skb, len);
1470 if (priv->desc_64b_en) {
1471 skb_pull(skb, 64);
1472 len -= 64;
1473 }
1474
1475 if (likely(chksum_ok))
1476 skb->ip_summed = CHECKSUM_UNNECESSARY;
1477
1478 /* remove hardware 2bytes added for IP alignment */
1479 skb_pull(skb, 2);
1480 len -= 2;
1481
1482 if (priv->crc_fwd_en) {
1483 skb_trim(skb, len - ETH_FCS_LEN);
1484 len -= ETH_FCS_LEN;
1485 }
1486
1487 /*Finish setting up the received SKB and send it to the kernel*/
1488 skb->protocol = eth_type_trans(skb, priv->dev);
1489 dev->stats.rx_packets++;
1490 dev->stats.rx_bytes += len;
1491 if (dma_flag & DMA_RX_MULT)
1492 dev->stats.multicast++;
1493
1494 /* Notify kernel */
1495 napi_gro_receive(&priv->napi, skb);
1496 cb->skb = NULL;
1497 netif_dbg(priv, rx_status, dev, "pushed up to kernel\n");
1498
1499 /* refill RX path on the current control block */
1500refill:
1501 err = bcmgenet_rx_refill(priv, cb);
44c8bc3c
FF		 1502 if (err) {
1503 priv->mib.alloc_rx_buff_failed++;
1c1008c7 1504 netif_err(priv, rx_err, dev, "Rx refill failed\n");
44c8bc3c 1505 }
cf377d88
FF		 1506
1507 rxpktprocessed++;
1508 priv->rx_read_ptr++;
1509 priv->rx_read_ptr &= (priv->num_rx_bds - 1);
1c1008c7
FF		 1510 }
1511
1512 return rxpktprocessed;
1513}
1514
1515/* Assign skb to RX DMA descriptor. */
1516static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv)
1517{
1518 struct enet_cb *cb;
1519 int ret = 0;
1520 int i;
1521
1522 netif_dbg(priv, hw, priv->dev, "%s:\n", __func__);
1523
1524 /* loop here for each buffer needing assign */
1525 for (i = 0; i < priv->num_rx_bds; i++) {
1526 cb = &priv->rx_cbs[priv->rx_bd_assign_index];
1527 if (cb->skb)
1528 continue;
1529
1c1008c7
FF		 1530 ret = bcmgenet_rx_refill(priv, cb);
1531 if (ret)
1532 break;
1c1008c7
FF		 1533 }
1534
1535 return ret;
1536}
1537
1538static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv)
1539{
1540 struct enet_cb *cb;
1541 int i;
1542
1543 for (i = 0; i < priv->num_rx_bds; i++) {
1544 cb = &priv->rx_cbs[i];
1545
1546 if (dma_unmap_addr(cb, dma_addr)) {
1547 dma_unmap_single(&priv->dev->dev,
c91b7f66
FF		 1548 dma_unmap_addr(cb, dma_addr),
1549 priv->rx_buf_len, DMA_FROM_DEVICE);
1c1008c7
FF		 1550 dma_unmap_addr_set(cb, dma_addr, 0);
1551 }
1552
1553 if (cb->skb)
1554 bcmgenet_free_cb(cb);
1555 }
1556}
1557
c91b7f66 1558static void umac_enable_set(struct bcmgenet_priv *priv, u32 mask, bool enable)
e29585b8
FF		 1559{
1560 u32 reg;
1561
1562 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
1563 if (enable)
1564 reg |= mask;
1565 else
1566 reg &= ~mask;
1567 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
1568
1569 /* UniMAC stops on a packet boundary, wait for a full-size packet
1570 * to be processed
1571 */
1572 if (enable == 0)
1573 usleep_range(1000, 2000);
1574}
1575
1c1008c7
FF		 1576static int reset_umac(struct bcmgenet_priv *priv)
1577{
1578 struct device *kdev = &priv->pdev->dev;
1579 unsigned int timeout = 0;
1580 u32 reg;
1581
1582 /* 7358a0/7552a0: bad default in RBUF_FLUSH_CTRL.umac_sw_rst */
1583 bcmgenet_rbuf_ctrl_set(priv, 0);
1584 udelay(10);
1585
1586 /* disable MAC while updating its registers */
1587 bcmgenet_umac_writel(priv, 0, UMAC_CMD);
1588
1589 /* issue soft reset, wait for it to complete */
1590 bcmgenet_umac_writel(priv, CMD_SW_RESET, UMAC_CMD);
1591 while (timeout++ < 1000) {
1592 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
1593 if (!(reg & CMD_SW_RESET))
1594 return 0;
1595
1596 udelay(1);
1597 }
1598
1599 if (timeout == 1000) {
1600 dev_err(kdev,
7fc527f9 1601 "timeout waiting for MAC to come out of reset\n");
1c1008c7
FF		 1602 return -ETIMEDOUT;
1603 }
1604
1605 return 0;
1606}
1607
909ff5ef
FF		 1608static void bcmgenet_intr_disable(struct bcmgenet_priv *priv)
1609{
1610 /* Mask all interrupts.*/
1611 bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
1612 bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
1613 bcmgenet_intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1614 bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
1615 bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
1616 bcmgenet_intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1617}
1618
1c1008c7
FF		 1619static int init_umac(struct bcmgenet_priv *priv)
1620{
1621 struct device *kdev = &priv->pdev->dev;
1622 int ret;
1623 u32 reg, cpu_mask_clear;
1624
1625 dev_dbg(&priv->pdev->dev, "bcmgenet: init_umac\n");
1626
1627 ret = reset_umac(priv);
1628 if (ret)
1629 return ret;
1630
1631 bcmgenet_umac_writel(priv, 0, UMAC_CMD);
1632 /* clear tx/rx counter */
1633 bcmgenet_umac_writel(priv,
c91b7f66
FF		 1634 MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT,
1635 UMAC_MIB_CTRL);
1c1008c7
FF		 1636 bcmgenet_umac_writel(priv, 0, UMAC_MIB_CTRL);
1637
1638 bcmgenet_umac_writel(priv, ENET_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1639
1640 /* init rx registers, enable ip header optimization */
1641 reg = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
1642 reg |= RBUF_ALIGN_2B;
1643 bcmgenet_rbuf_writel(priv, reg, RBUF_CTRL);
1644
1645 if (!GENET_IS_V1(priv) && !GENET_IS_V2(priv))
1646 bcmgenet_rbuf_writel(priv, 1, RBUF_TBUF_SIZE_CTRL);
1647
909ff5ef 1648 bcmgenet_intr_disable(priv);
1c1008c7
FF		 1649
1650 cpu_mask_clear = UMAC_IRQ_RXDMA_BDONE;
1651
1652 dev_dbg(kdev, "%s:Enabling RXDMA_BDONE interrupt\n", __func__);
1653
7fc527f9 1654 /* Monitor cable plug/unplugged event for internal PHY */
8900ea57 1655 if (phy_is_internal(priv->phydev)) {
1c1008c7 1656 cpu_mask_clear |= (UMAC_IRQ_LINK_DOWN | UMAC_IRQ_LINK_UP);
8900ea57 1657 } else if (priv->ext_phy) {
1c1008c7 1658 cpu_mask_clear |= (UMAC_IRQ_LINK_DOWN | UMAC_IRQ_LINK_UP);
8900ea57 1659 } else if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
1c1008c7
FF		 1660 reg = bcmgenet_bp_mc_get(priv);
1661 reg |= BIT(priv->hw_params->bp_in_en_shift);
1662
1663 /* bp_mask: back pressure mask */
1664 if (netif_is_multiqueue(priv->dev))
1665 reg |= priv->hw_params->bp_in_mask;
1666 else
1667 reg &= ~priv->hw_params->bp_in_mask;
1668 bcmgenet_bp_mc_set(priv, reg);
1669 }
1670
1671 /* Enable MDIO interrupts on GENET v3+ */
1672 if (priv->hw_params->flags & GENET_HAS_MDIO_INTR)
1673 cpu_mask_clear |= UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR;
1674
c91b7f66 1675 bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR);
1c1008c7
FF		 1676
1677 /* Enable rx/tx engine.*/
1678 dev_dbg(kdev, "done init umac\n");
1679
1680 return 0;
1681}
1682
1683/* Initialize all house-keeping variables for a TX ring, along
1684 * with corresponding hardware registers
1685 */
1686static void bcmgenet_init_tx_ring(struct bcmgenet_priv *priv,
1687 unsigned int index, unsigned int size,
1688 unsigned int write_ptr, unsigned int end_ptr)
1689{
1690 struct bcmgenet_tx_ring *ring = &priv->tx_rings[index];
1691 u32 words_per_bd = WORDS_PER_BD(priv);
1692 u32 flow_period_val = 0;
1693 unsigned int first_bd;
1694
1695 spin_lock_init(&ring->lock);
1696 ring->index = index;
1697 if (index == DESC_INDEX) {
1698 ring->queue = 0;
1699 ring->int_enable = bcmgenet_tx_ring16_int_enable;
1700 ring->int_disable = bcmgenet_tx_ring16_int_disable;
1701 } else {
1702 ring->queue = index + 1;
1703 ring->int_enable = bcmgenet_tx_ring_int_enable;
1704 ring->int_disable = bcmgenet_tx_ring_int_disable;
1705 }
1706 ring->cbs = priv->tx_cbs + write_ptr;
1707 ring->size = size;
1708 ring->c_index = 0;
1709 ring->free_bds = size;
1710 ring->write_ptr = write_ptr;
1711 ring->cb_ptr = write_ptr;
1712 ring->end_ptr = end_ptr - 1;
1713 ring->prod_index = 0;
1714
1715 /* Set flow period for ring != 16 */
1716 if (index != DESC_INDEX)
1717 flow_period_val = ENET_MAX_MTU_SIZE << 16;
1718
1719 bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_PROD_INDEX);
1720 bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_CONS_INDEX);
1721 bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
1722 /* Disable rate control for now */
1723 bcmgenet_tdma_ring_writel(priv, index, flow_period_val,
c91b7f66 1724 TDMA_FLOW_PERIOD);
1c1008c7
FF		 1725 /* Unclassified traffic goes to ring 16 */
1726 bcmgenet_tdma_ring_writel(priv, index,
c91b7f66
FF		 1727 ((size << DMA_RING_SIZE_SHIFT) |
1728 RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
1c1008c7
FF		 1729
1730 first_bd = write_ptr;
1731
1732 /* Set start and end address, read and write pointers */
1733 bcmgenet_tdma_ring_writel(priv, index, first_bd * words_per_bd,
c91b7f66 1734 DMA_START_ADDR);
1c1008c7 1735 bcmgenet_tdma_ring_writel(priv, index, first_bd * words_per_bd,
c91b7f66 1736 TDMA_READ_PTR);
1c1008c7 1737 bcmgenet_tdma_ring_writel(priv, index, first_bd,
c91b7f66 1738 TDMA_WRITE_PTR);
1c1008c7 1739 bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
c91b7f66 1740 DMA_END_ADDR);
1c1008c7
FF		 1741}
1742
1743/* Initialize a RDMA ring */
1744static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv,
c91b7f66 1745 unsigned int index, unsigned int size)
1c1008c7
FF		 1746{
1747 u32 words_per_bd = WORDS_PER_BD(priv);
1748 int ret;
1749
1750 priv->num_rx_bds = TOTAL_DESC;
1751 priv->rx_bds = priv->base + priv->hw_params->rdma_offset;
1752 priv->rx_bd_assign_ptr = priv->rx_bds;
1753 priv->rx_bd_assign_index = 0;
1754 priv->rx_c_index = 0;
1755 priv->rx_read_ptr = 0;
c489be08
FF		 1756 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct enet_cb),
1757 GFP_KERNEL);
1c1008c7
FF		 1758 if (!priv->rx_cbs)
1759 return -ENOMEM;
1760
1761 ret = bcmgenet_alloc_rx_buffers(priv);
1762 if (ret) {
1763 kfree(priv->rx_cbs);
1764 return ret;
1765 }
1766
1767 bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_WRITE_PTR);
1768 bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_PROD_INDEX);
1769 bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_CONS_INDEX);
1770 bcmgenet_rdma_ring_writel(priv, index,
c91b7f66
FF		 1771 ((size << DMA_RING_SIZE_SHIFT) |
1772 RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
1c1008c7
FF		 1773 bcmgenet_rdma_ring_writel(priv, index, 0, DMA_START_ADDR);
1774 bcmgenet_rdma_ring_writel(priv, index,
c91b7f66 1775 words_per_bd * size - 1, DMA_END_ADDR);
1c1008c7 1776 bcmgenet_rdma_ring_writel(priv, index,
c91b7f66
FF		 1777 (DMA_FC_THRESH_LO <<
1778 DMA_XOFF_THRESHOLD_SHIFT) |
1779 DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH);
1c1008c7
FF		 1780 bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_READ_PTR);
1781
1782 return ret;
1783}
1784
1785/* init multi xmit queues, only available for GENET2+
1786 * the queue is partitioned as follows:
1787 *
1788 * queue 0 - 3 is priority based, each one has 32 descriptors,
1789 * with queue 0 being the highest priority queue.
1790 *
1791 * queue 16 is the default tx queue with GENET_DEFAULT_BD_CNT
1792 * descriptors: 256 - (number of tx queues * bds per queues) = 128
1793 * descriptors.
1794 *
1795 * The transmit control block pool is then partitioned as following:
1796 * - tx_cbs[0...127] are for queue 16
1797 * - tx_ring_cbs[0] points to tx_cbs[128..159]
1798 * - tx_ring_cbs[1] points to tx_cbs[160..191]
1799 * - tx_ring_cbs[2] points to tx_cbs[192..223]
1800 * - tx_ring_cbs[3] points to tx_cbs[224..255]
1801 */
1802static void bcmgenet_init_multiq(struct net_device *dev)
1803{
1804 struct bcmgenet_priv *priv = netdev_priv(dev);
1805 unsigned int i, dma_enable;
37742166
PG		 1806 u32 reg, dma_ctrl, ring_cfg = 0;
1807 u32 dma_priority[3] = {0, 0, 0};
1c1008c7
FF		 1808
1809 if (!netif_is_multiqueue(dev)) {
1810 netdev_warn(dev, "called with non multi queue aware HW\n");
1811 return;
1812 }
1813
1814 dma_ctrl = bcmgenet_tdma_readl(priv, DMA_CTRL);
1815 dma_enable = dma_ctrl & DMA_EN;
1816 dma_ctrl &= ~DMA_EN;
1817 bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
1818
1819 /* Enable strict priority arbiter mode */
1820 bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL);
1821
1822 for (i = 0; i < priv->hw_params->tx_queues; i++) {
1823 /* first 64 tx_cbs are reserved for default tx queue
1824 * (ring 16)
1825 */
1826 bcmgenet_init_tx_ring(priv, i, priv->hw_params->bds_cnt,
c91b7f66
FF		 1827 i * priv->hw_params->bds_cnt,
1828 (i + 1) * priv->hw_params->bds_cnt);
1c1008c7 1829
7fc527f9 1830 /* Configure ring as descriptor ring and setup priority */
1c1008c7 1831 ring_cfg |= 1 << i;
1c1008c7 1832 dma_ctrl |= 1 << (i + DMA_RING_BUF_EN_SHIFT);
37742166
PG		 1833
1834 dma_priority[DMA_PRIO_REG_INDEX(i)] |=
1835 ((GENET_Q0_PRIORITY + i) << DMA_PRIO_REG_SHIFT(i));
1c1008c7
FF		 1836 }
1837
37742166
PG		 1838 /* Set ring 16 priority and program the hardware registers */
1839 dma_priority[DMA_PRIO_REG_INDEX(DESC_INDEX)] |=
1840 ((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) <<
1841 DMA_PRIO_REG_SHIFT(DESC_INDEX));
1842 bcmgenet_tdma_writel(priv, dma_priority[0], DMA_PRIORITY_0);
1843 bcmgenet_tdma_writel(priv, dma_priority[1], DMA_PRIORITY_1);
1844 bcmgenet_tdma_writel(priv, dma_priority[2], DMA_PRIORITY_2);
1845
1c1008c7
FF		 1846 /* Enable rings */
1847 reg = bcmgenet_tdma_readl(priv, DMA_RING_CFG);
1848 reg |= ring_cfg;
1849 bcmgenet_tdma_writel(priv, reg, DMA_RING_CFG);
1850
1c1008c7
FF		 1851 /* Configure ring as descriptor ring and re-enable DMA if enabled */
1852 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
1853 reg |= dma_ctrl;
1854 if (dma_enable)
1855 reg |= DMA_EN;
1856 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
1857}
1858
4a0c081e
FF		 1859static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
1860{
1861 int ret = 0;
1862 int timeout = 0;
1863 u32 reg;
1864
1865 /* Disable TDMA to stop add more frames in TX DMA */
1866 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
1867 reg &= ~DMA_EN;
1868 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
1869
1870 /* Check TDMA status register to confirm TDMA is disabled */
1871 while (timeout++ < DMA_TIMEOUT_VAL) {
1872 reg = bcmgenet_tdma_readl(priv, DMA_STATUS);
1873 if (reg & DMA_DISABLED)
1874 break;
1875
1876 udelay(1);
1877 }
1878
1879 if (timeout == DMA_TIMEOUT_VAL) {
1880 netdev_warn(priv->dev, "Timed out while disabling TX DMA\n");
1881 ret = -ETIMEDOUT;
1882 }
1883
1884 /* Wait 10ms for packet drain in both tx and rx dma */
1885 usleep_range(10000, 20000);
1886
1887 /* Disable RDMA */
1888 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
1889 reg &= ~DMA_EN;
1890 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
1891
1892 timeout = 0;
1893 /* Check RDMA status register to confirm RDMA is disabled */
1894 while (timeout++ < DMA_TIMEOUT_VAL) {
1895 reg = bcmgenet_rdma_readl(priv, DMA_STATUS);
1896 if (reg & DMA_DISABLED)
1897 break;
1898
1899 udelay(1);
1900 }
1901
1902 if (timeout == DMA_TIMEOUT_VAL) {
1903 netdev_warn(priv->dev, "Timed out while disabling RX DMA\n");
1904 ret = -ETIMEDOUT;
1905 }
1906
1907 return ret;
1908}
1909
1c1008c7
FF		 1910static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
1911{
1912 int i;
1913
1914 /* disable DMA */
4a0c081e 1915 bcmgenet_dma_teardown(priv);
1c1008c7
FF		 1916
1917 for (i = 0; i < priv->num_tx_bds; i++) {
1918 if (priv->tx_cbs[i].skb != NULL) {
1919 dev_kfree_skb(priv->tx_cbs[i].skb);
1920 priv->tx_cbs[i].skb = NULL;
1921 }
1922 }
1923
1924 bcmgenet_free_rx_buffers(priv);
1925 kfree(priv->rx_cbs);
1926 kfree(priv->tx_cbs);
1927}
1928
1929/* init_edma: Initialize DMA control register */
1930static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
1931{
1932 int ret;
1933
1934 netif_dbg(priv, hw, priv->dev, "bcmgenet: init_edma\n");
1935
1936 /* by default, enable ring 16 (descriptor based) */
1937 ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, TOTAL_DESC);
1938 if (ret) {
1939 netdev_err(priv->dev, "failed to initialize RX ring\n");
1940 return ret;
1941 }
1942
1943 /* init rDma */
1944 bcmgenet_rdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
1945
1946 /* Init tDma */
1947 bcmgenet_tdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
1948
7fc527f9 1949 /* Initialize common TX ring structures */
1c1008c7
FF		 1950 priv->tx_bds = priv->base + priv->hw_params->tdma_offset;
1951 priv->num_tx_bds = TOTAL_DESC;
c489be08 1952 priv->tx_cbs = kcalloc(priv->num_tx_bds, sizeof(struct enet_cb),
c91b7f66 1953 GFP_KERNEL);
1c1008c7
FF		 1954 if (!priv->tx_cbs) {
1955 bcmgenet_fini_dma(priv);
1956 return -ENOMEM;
1957 }
1958
1959 /* initialize multi xmit queue */
1960 bcmgenet_init_multiq(priv->dev);
1961
1962 /* initialize special ring 16 */
1963 bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_DEFAULT_BD_CNT,
c91b7f66
FF		 1964 priv->hw_params->tx_queues *
1965 priv->hw_params->bds_cnt,
1966 TOTAL_DESC);
1c1008c7
FF		 1967
1968 return 0;
1969}
1970
1971/* NAPI polling method*/
1972static int bcmgenet_poll(struct napi_struct *napi, int budget)
1973{
1974 struct bcmgenet_priv *priv = container_of(napi,
1975 struct bcmgenet_priv, napi);
1976 unsigned int work_done;
1977
1978 /* tx reclaim */
1979 bcmgenet_tx_reclaim(priv->dev, &priv->tx_rings[DESC_INDEX]);
1980
1981 work_done = bcmgenet_desc_rx(priv, budget);
1982
1983 /* Advancing our consumer index*/
1984 priv->rx_c_index += work_done;
1985 priv->rx_c_index &= DMA_C_INDEX_MASK;
1986 bcmgenet_rdma_ring_writel(priv, DESC_INDEX,
c91b7f66 1987 priv->rx_c_index, RDMA_CONS_INDEX);
1c1008c7
FF		 1988 if (work_done < budget) {
1989 napi_complete(napi);
c91b7f66
FF		 1990 bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_BDONE,
1991 INTRL2_CPU_MASK_CLEAR);
1c1008c7
FF		 1992 }
1993
1994 return work_done;
1995}
1996
1997/* Interrupt bottom half */
1998static void bcmgenet_irq_task(struct work_struct *work)
1999{
2000 struct bcmgenet_priv *priv = container_of(
2001 work, struct bcmgenet_priv, bcmgenet_irq_work);
2002
2003 netif_dbg(priv, intr, priv->dev, "%s\n", __func__);
2004
8fdb0e0f
FF		 2005 if (priv->irq0_stat & UMAC_IRQ_MPD_R) {
2006 priv->irq0_stat &= ~UMAC_IRQ_MPD_R;
2007 netif_dbg(priv, wol, priv->dev,
2008 "magic packet detected, waking up\n");
2009 bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
2010 }
2011
1c1008c7
FF		 2012 /* Link UP/DOWN event */
2013 if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
c91b7f66 2014 (priv->irq0_stat & (UMAC_IRQ_LINK_UP|UMAC_IRQ_LINK_DOWN))) {
80d8e96d 2015 phy_mac_interrupt(priv->phydev,
c91b7f66 2016 priv->irq0_stat & UMAC_IRQ_LINK_UP);
1c1008c7
FF		 2017 priv->irq0_stat &= ~(UMAC_IRQ_LINK_UP|UMAC_IRQ_LINK_DOWN);
2018 }
2019}
2020
2021/* bcmgenet_isr1: interrupt handler for ring buffer. */
2022static irqreturn_t bcmgenet_isr1(int irq, void *dev_id)
2023{
2024 struct bcmgenet_priv *priv = dev_id;
2025 unsigned int index;
2026
2027 /* Save irq status for bottom-half processing. */
2028 priv->irq1_stat =
2029 bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) &
2030 ~priv->int1_mask;
7fc527f9 2031 /* clear interrupts */
1c1008c7
FF		 2032 bcmgenet_intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
2033
2034 netif_dbg(priv, intr, priv->dev,
c91b7f66 2035 "%s: IRQ=0x%x\n", __func__, priv->irq1_stat);
1c1008c7
FF		 2036 /* Check the MBDONE interrupts.
2037 * packet is done, reclaim descriptors
2038 */
2039 if (priv->irq1_stat & 0x0000ffff) {
2040 index = 0;
2041 for (index = 0; index < 16; index++) {
2042 if (priv->irq1_stat & (1 << index))
2043 bcmgenet_tx_reclaim(priv->dev,
c91b7f66 2044 &priv->tx_rings[index]);
1c1008c7
FF		 2045 }
2046 }
2047 return IRQ_HANDLED;
2048}
2049
2050/* bcmgenet_isr0: Handle various interrupts. */
2051static irqreturn_t bcmgenet_isr0(int irq, void *dev_id)
2052{
2053 struct bcmgenet_priv *priv = dev_id;
2054
2055 /* Save irq status for bottom-half processing. */
2056 priv->irq0_stat =
2057 bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT) &
2058 ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
7fc527f9 2059 /* clear interrupts */
1c1008c7
FF		 2060 bcmgenet_intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
2061
2062 netif_dbg(priv, intr, priv->dev,
c91b7f66 2063 "IRQ=0x%x\n", priv->irq0_stat);
1c1008c7
FF		 2064
2065 if (priv->irq0_stat & (UMAC_IRQ_RXDMA_BDONE | UMAC_IRQ_RXDMA_PDONE)) {
2066 /* We use NAPI(software interrupt throttling, if
2067 * Rx Descriptor throttling is not used.
2068 * Disable interrupt, will be enabled in the poll method.
2069 */
2070 if (likely(napi_schedule_prep(&priv->napi))) {
c91b7f66
FF		 2071 bcmgenet_intrl2_0_writel(priv, UMAC_IRQ_RXDMA_BDONE,
2072 INTRL2_CPU_MASK_SET);
1c1008c7
FF		 2073 __napi_schedule(&priv->napi);
2074 }
2075 }
2076 if (priv->irq0_stat &
2077 (UMAC_IRQ_TXDMA_BDONE | UMAC_IRQ_TXDMA_PDONE)) {
2078 /* Tx reclaim */
2079 bcmgenet_tx_reclaim(priv->dev, &priv->tx_rings[DESC_INDEX]);
2080 }
2081 if (priv->irq0_stat & (UMAC_IRQ_PHY_DET_R |
2082 UMAC_IRQ_PHY_DET_F |
2083 UMAC_IRQ_LINK_UP |
2084 UMAC_IRQ_LINK_DOWN |
2085 UMAC_IRQ_HFB_SM |
2086 UMAC_IRQ_HFB_MM |
2087 UMAC_IRQ_MPD_R)) {
2088 /* all other interested interrupts handled in bottom half */
2089 schedule_work(&priv->bcmgenet_irq_work);
2090 }
2091
2092 if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
c91b7f66 2093 priv->irq0_stat & (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR)) {
1c1008c7
FF		 2094 priv->irq0_stat &= ~(UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR);
2095 wake_up(&priv->wq);
2096 }
2097
2098 return IRQ_HANDLED;
2099}
2100
8562056f
FF		 2101static irqreturn_t bcmgenet_wol_isr(int irq, void *dev_id)
2102{
2103 struct bcmgenet_priv *priv = dev_id;
2104
2105 pm_wakeup_event(&priv->pdev->dev, 0);
2106
2107 return IRQ_HANDLED;
2108}
2109
1c1008c7
FF		 2110static void bcmgenet_umac_reset(struct bcmgenet_priv *priv)
2111{
2112 u32 reg;
2113
2114 reg = bcmgenet_rbuf_ctrl_get(priv);
2115 reg |= BIT(1);
2116 bcmgenet_rbuf_ctrl_set(priv, reg);
2117 udelay(10);
2118
2119 reg &= ~BIT(1);
2120 bcmgenet_rbuf_ctrl_set(priv, reg);
2121 udelay(10);
2122}
2123
2124static void bcmgenet_set_hw_addr(struct bcmgenet_priv *priv,
c91b7f66 2125 unsigned char *addr)
1c1008c7
FF		 2126{
2127 bcmgenet_umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) |
2128 (addr[2] << 8) | addr[3], UMAC_MAC0);
2129 bcmgenet_umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1);
2130}
2131
1c1008c7
FF		 2132/* Returns a reusable dma control register value */
2133static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv)
2134{
2135 u32 reg;
2136 u32 dma_ctrl;
2137
2138 /* disable DMA */
2139 dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
2140 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2141 reg &= ~dma_ctrl;
2142 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2143
2144 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2145 reg &= ~dma_ctrl;
2146 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2147
2148 bcmgenet_umac_writel(priv, 1, UMAC_TX_FLUSH);
2149 udelay(10);
2150 bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH);
2151
2152 return dma_ctrl;
2153}
2154
2155static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl)
2156{
2157 u32 reg;
2158
2159 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2160 reg |= dma_ctrl;
2161 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2162
2163 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2164 reg |= dma_ctrl;
2165 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2166}
2167
909ff5ef
FF		 2168static void bcmgenet_netif_start(struct net_device *dev)
2169{
2170 struct bcmgenet_priv *priv = netdev_priv(dev);
2171
2172 /* Start the network engine */
2173 napi_enable(&priv->napi);
2174
2175 umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
2176
2177 if (phy_is_internal(priv->phydev))
2178 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
2179
2180 netif_tx_start_all_queues(dev);
2181
2182 phy_start(priv->phydev);
2183}
2184
1c1008c7
FF		 2185static int bcmgenet_open(struct net_device *dev)
2186{
2187 struct bcmgenet_priv *priv = netdev_priv(dev);
2188 unsigned long dma_ctrl;
2189 u32 reg;
2190 int ret;
2191
2192 netif_dbg(priv, ifup, dev, "bcmgenet_open\n");
2193
2194 /* Turn on the clock */
2195 if (!IS_ERR(priv->clk))
2196 clk_prepare_enable(priv->clk);
2197
2198 /* take MAC out of reset */
2199 bcmgenet_umac_reset(priv);
2200
2201 ret = init_umac(priv);
2202 if (ret)
2203 goto err_clk_disable;
2204
2205 /* disable ethernet MAC while updating its registers */
e29585b8 2206 umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, false);
1c1008c7 2207
909ff5ef
FF		 2208 /* Make sure we reflect the value of CRC_CMD_FWD */
2209 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
2210 priv->crc_fwd_en = !!(reg & CMD_CRC_FWD);
2211
1c1008c7
FF		 2212 bcmgenet_set_hw_addr(priv, dev->dev_addr);
2213
1c1008c7
FF		 2214 if (phy_is_internal(priv->phydev)) {
2215 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
2216 reg |= EXT_ENERGY_DET_MASK;
2217 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
2218 }
2219
2220 /* Disable RX/TX DMA and flush TX queues */
2221 dma_ctrl = bcmgenet_dma_disable(priv);
2222
2223 /* Reinitialize TDMA and RDMA and SW housekeeping */
2224 ret = bcmgenet_init_dma(priv);
2225 if (ret) {
2226 netdev_err(dev, "failed to initialize DMA\n");
2227 goto err_fini_dma;
2228 }
2229
2230 /* Always enable ring 16 - descriptor ring */
2231 bcmgenet_enable_dma(priv, dma_ctrl);
2232
2233 ret = request_irq(priv->irq0, bcmgenet_isr0, IRQF_SHARED,
c91b7f66 2234 dev->name, priv);
1c1008c7
FF		 2235 if (ret < 0) {
2236 netdev_err(dev, "can't request IRQ %d\n", priv->irq0);
2237 goto err_fini_dma;
2238 }
2239
2240 ret = request_irq(priv->irq1, bcmgenet_isr1, IRQF_SHARED,
c91b7f66 2241 dev->name, priv);
1c1008c7
FF		 2242 if (ret < 0) {
2243 netdev_err(dev, "can't request IRQ %d\n", priv->irq1);
2244 goto err_irq0;
2245 }
2246
dbd479db
FF		 2247 /* Re-configure the port multiplexer towards the PHY device */
2248 bcmgenet_mii_config(priv->dev, false);
2249
c96e731c
FF		 2250 phy_connect_direct(dev, priv->phydev, bcmgenet_mii_setup,
2251 priv->phy_interface);
2252
909ff5ef 2253 bcmgenet_netif_start(dev);
1c1008c7
FF		 2254
2255 return 0;
2256
2257err_irq0:
2258 free_irq(priv->irq0, dev);
2259err_fini_dma:
2260 bcmgenet_fini_dma(priv);
2261err_clk_disable:
2262 if (!IS_ERR(priv->clk))
2263 clk_disable_unprepare(priv->clk);
2264 return ret;
2265}
2266
909ff5ef
FF		 2267static void bcmgenet_netif_stop(struct net_device *dev)
2268{
2269 struct bcmgenet_priv *priv = netdev_priv(dev);
2270
2271 netif_tx_stop_all_queues(dev);
2272 napi_disable(&priv->napi);
2273 phy_stop(priv->phydev);
2274
2275 bcmgenet_intr_disable(priv);
2276
2277 /* Wait for pending work items to complete. Since interrupts are
2278 * disabled no new work will be scheduled.
2279 */
2280 cancel_work_sync(&priv->bcmgenet_irq_work);
cc013fb4 2281
cc013fb4 2282 priv->old_link = -1;
5ad6e6c5 2283 priv->old_speed = -1;
cc013fb4 2284 priv->old_duplex = -1;
5ad6e6c5 2285 priv->old_pause = -1;
909ff5ef
FF		 2286}
2287
1c1008c7
FF		 2288static int bcmgenet_close(struct net_device *dev)
2289{
2290 struct bcmgenet_priv *priv = netdev_priv(dev);
2291 int ret;
1c1008c7
FF		 2292
2293 netif_dbg(priv, ifdown, dev, "bcmgenet_close\n");
2294
909ff5ef 2295 bcmgenet_netif_stop(dev);
1c1008c7 2296
c96e731c
FF		 2297 /* Really kill the PHY state machine and disconnect from it */
2298 phy_disconnect(priv->phydev);
2299
1c1008c7 2300 /* Disable MAC receive */
e29585b8 2301 umac_enable_set(priv, CMD_RX_EN, false);
1c1008c7 2302
1c1008c7
FF		 2303 ret = bcmgenet_dma_teardown(priv);
2304 if (ret)
2305 return ret;
2306
2307 /* Disable MAC transmit. TX DMA disabled have to done before this */
e29585b8 2308 umac_enable_set(priv, CMD_TX_EN, false);
1c1008c7 2309
1c1008c7
FF		 2310 /* tx reclaim */
2311 bcmgenet_tx_reclaim_all(dev);
2312 bcmgenet_fini_dma(priv);
2313
2314 free_irq(priv->irq0, priv);
2315 free_irq(priv->irq1, priv);
2316
1c1008c7
FF		 2317 if (phy_is_internal(priv->phydev))
2318 bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
2319
1c1008c7
FF		 2320 if (!IS_ERR(priv->clk))
2321 clk_disable_unprepare(priv->clk);
2322
2323 return 0;
2324}
2325
2326static void bcmgenet_timeout(struct net_device *dev)
2327{
2328 struct bcmgenet_priv *priv = netdev_priv(dev);
2329
2330 netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n");
2331
2332 dev->trans_start = jiffies;
2333
2334 dev->stats.tx_errors++;
2335
2336 netif_tx_wake_all_queues(dev);
2337}
2338
2339#define MAX_MC_COUNT 16
2340
2341static inline void bcmgenet_set_mdf_addr(struct bcmgenet_priv *priv,
2342 unsigned char *addr,
2343 int *i,
2344 int *mc)
2345{
2346 u32 reg;
2347
c91b7f66
FF		 2348 bcmgenet_umac_writel(priv, addr[0] << 8 | addr[1],
2349 UMAC_MDF_ADDR + (*i * 4));
2350 bcmgenet_umac_writel(priv, addr[2] << 24 | addr[3] << 16 |
2351 addr[4] << 8 | addr[5],
2352 UMAC_MDF_ADDR + ((*i + 1) * 4));
1c1008c7
FF		 2353 reg = bcmgenet_umac_readl(priv, UMAC_MDF_CTRL);
2354 reg |= (1 << (MAX_MC_COUNT - *mc));
2355 bcmgenet_umac_writel(priv, reg, UMAC_MDF_CTRL);
2356 *i += 2;
2357 (*mc)++;
2358}
2359
2360static void bcmgenet_set_rx_mode(struct net_device *dev)
2361{
2362 struct bcmgenet_priv *priv = netdev_priv(dev);
2363 struct netdev_hw_addr *ha;
2364 int i, mc;
2365 u32 reg;
2366
2367 netif_dbg(priv, hw, dev, "%s: %08X\n", __func__, dev->flags);
2368
7fc527f9 2369 /* Promiscuous mode */
1c1008c7
FF		 2370 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
2371 if (dev->flags & IFF_PROMISC) {
2372 reg |= CMD_PROMISC;
2373 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
2374 bcmgenet_umac_writel(priv, 0, UMAC_MDF_CTRL);
2375 return;
2376 } else {
2377 reg &= ~CMD_PROMISC;
2378 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
2379 }
2380
2381 /* UniMac doesn't support ALLMULTI */
2382 if (dev->flags & IFF_ALLMULTI) {
2383 netdev_warn(dev, "ALLMULTI is not supported\n");
2384 return;
2385 }
2386
2387 /* update MDF filter */
2388 i = 0;
2389 mc = 0;
2390 /* Broadcast */
2391 bcmgenet_set_mdf_addr(priv, dev->broadcast, &i, &mc);
2392 /* my own address.*/
2393 bcmgenet_set_mdf_addr(priv, dev->dev_addr, &i, &mc);
2394 /* Unicast list*/
2395 if (netdev_uc_count(dev) > (MAX_MC_COUNT - mc))
2396 return;
2397
2398 if (!netdev_uc_empty(dev))
2399 netdev_for_each_uc_addr(ha, dev)
2400 bcmgenet_set_mdf_addr(priv, ha->addr, &i, &mc);
2401 /* Multicast */
2402 if (netdev_mc_empty(dev) || netdev_mc_count(dev) >= (MAX_MC_COUNT - mc))
2403 return;
2404
2405 netdev_for_each_mc_addr(ha, dev)
2406 bcmgenet_set_mdf_addr(priv, ha->addr, &i, &mc);
2407}
2408
2409/* Set the hardware MAC address. */
2410static int bcmgenet_set_mac_addr(struct net_device *dev, void *p)
2411{
2412 struct sockaddr *addr = p;
2413
2414 /* Setting the MAC address at the hardware level is not possible
2415 * without disabling the UniMAC RX/TX enable bits.
2416 */
2417 if (netif_running(dev))
2418 return -EBUSY;
2419
2420 ether_addr_copy(dev->dev_addr, addr->sa_data);
2421
2422 return 0;
2423}
2424
1c1008c7
FF		 2425static const struct net_device_ops bcmgenet_netdev_ops = {
2426 .ndo_open = bcmgenet_open,
2427 .ndo_stop = bcmgenet_close,
2428 .ndo_start_xmit = bcmgenet_xmit,
1c1008c7
FF		 2429 .ndo_tx_timeout = bcmgenet_timeout,
2430 .ndo_set_rx_mode = bcmgenet_set_rx_mode,
2431 .ndo_set_mac_address = bcmgenet_set_mac_addr,
2432 .ndo_do_ioctl = bcmgenet_ioctl,
2433 .ndo_set_features = bcmgenet_set_features,
2434};
2435
2436/* Array of GENET hardware parameters/characteristics */
2437static struct bcmgenet_hw_params bcmgenet_hw_params[] = {
2438 [GENET_V1] = {
2439 .tx_queues = 0,
2440 .rx_queues = 0,
2441 .bds_cnt = 0,
2442 .bp_in_en_shift = 16,
2443 .bp_in_mask = 0xffff,
2444 .hfb_filter_cnt = 16,
2445 .qtag_mask = 0x1F,
2446 .hfb_offset = 0x1000,
2447 .rdma_offset = 0x2000,
2448 .tdma_offset = 0x3000,
2449 .words_per_bd = 2,
2450 },
2451 [GENET_V2] = {
2452 .tx_queues = 4,
2453 .rx_queues = 4,
2454 .bds_cnt = 32,
2455 .bp_in_en_shift = 16,
2456 .bp_in_mask = 0xffff,
2457 .hfb_filter_cnt = 16,
2458 .qtag_mask = 0x1F,
2459 .tbuf_offset = 0x0600,
2460 .hfb_offset = 0x1000,
2461 .hfb_reg_offset = 0x2000,
2462 .rdma_offset = 0x3000,
2463 .tdma_offset = 0x4000,
2464 .words_per_bd = 2,
2465 .flags = GENET_HAS_EXT,
2466 },
2467 [GENET_V3] = {
2468 .tx_queues = 4,
2469 .rx_queues = 4,
2470 .bds_cnt = 32,
2471 .bp_in_en_shift = 17,
2472 .bp_in_mask = 0x1ffff,
2473 .hfb_filter_cnt = 48,
2474 .qtag_mask = 0x3F,
2475 .tbuf_offset = 0x0600,
2476 .hfb_offset = 0x8000,
2477 .hfb_reg_offset = 0xfc00,
2478 .rdma_offset = 0x10000,
2479 .tdma_offset = 0x11000,
2480 .words_per_bd = 2,
2481 .flags = GENET_HAS_EXT | GENET_HAS_MDIO_INTR,
2482 },
2483 [GENET_V4] = {
2484 .tx_queues = 4,
2485 .rx_queues = 4,
2486 .bds_cnt = 32,
2487 .bp_in_en_shift = 17,
2488 .bp_in_mask = 0x1ffff,
2489 .hfb_filter_cnt = 48,
2490 .qtag_mask = 0x3F,
2491 .tbuf_offset = 0x0600,
2492 .hfb_offset = 0x8000,
2493 .hfb_reg_offset = 0xfc00,
2494 .rdma_offset = 0x2000,
2495 .tdma_offset = 0x4000,
2496 .words_per_bd = 3,
2497 .flags = GENET_HAS_40BITS | GENET_HAS_EXT | GENET_HAS_MDIO_INTR,
2498 },
2499};
2500
2501/* Infer hardware parameters from the detected GENET version */
2502static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv)
2503{
2504 struct bcmgenet_hw_params *params;
2505 u32 reg;
2506 u8 major;
b04a2f5b 2507 u16 gphy_rev;
1c1008c7
FF		 2508
2509 if (GENET_IS_V4(priv)) {
2510 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
2511 genet_dma_ring_regs = genet_dma_ring_regs_v4;
2512 priv->dma_rx_chk_bit = DMA_RX_CHK_V3PLUS;
2513 priv->version = GENET_V4;
2514 } else if (GENET_IS_V3(priv)) {
2515 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
2516 genet_dma_ring_regs = genet_dma_ring_regs_v123;
2517 priv->dma_rx_chk_bit = DMA_RX_CHK_V3PLUS;
2518 priv->version = GENET_V3;
2519 } else if (GENET_IS_V2(priv)) {
2520 bcmgenet_dma_regs = bcmgenet_dma_regs_v2;
2521 genet_dma_ring_regs = genet_dma_ring_regs_v123;
2522 priv->dma_rx_chk_bit = DMA_RX_CHK_V12;
2523 priv->version = GENET_V2;
2524 } else if (GENET_IS_V1(priv)) {
2525 bcmgenet_dma_regs = bcmgenet_dma_regs_v1;
2526 genet_dma_ring_regs = genet_dma_ring_regs_v123;
2527 priv->dma_rx_chk_bit = DMA_RX_CHK_V12;
2528 priv->version = GENET_V1;
2529 }
2530
2531 /* enum genet_version starts at 1 */
2532 priv->hw_params = &bcmgenet_hw_params[priv->version];
2533 params = priv->hw_params;
2534
2535 /* Read GENET HW version */
2536 reg = bcmgenet_sys_readl(priv, SYS_REV_CTRL);
2537 major = (reg >> 24 & 0x0f);
2538 if (major == 5)
2539 major = 4;
2540 else if (major == 0)
2541 major = 1;
2542 if (major != priv->version) {
2543 dev_err(&priv->pdev->dev,
2544 "GENET version mismatch, got: %d, configured for: %d\n",
2545 major, priv->version);
2546 }
2547
2548 /* Print the GENET core version */
2549 dev_info(&priv->pdev->dev, "GENET " GENET_VER_FMT,
c91b7f66 2550 major, (reg >> 16) & 0x0f, reg & 0xffff);
1c1008c7 2551
487320c5
FF		 2552 /* Store the integrated PHY revision for the MDIO probing function
2553 * to pass this information to the PHY driver. The PHY driver expects
2554 * to find the PHY major revision in bits 15:8 while the GENET register
2555 * stores that information in bits 7:0, account for that.
b04a2f5b
FF		 2556 *
2557 * On newer chips, starting with PHY revision G0, a new scheme is
2558 * deployed similar to the Starfighter 2 switch with GPHY major
2559 * revision in bits 15:8 and patch level in bits 7:0. Major revision 0
2560 * is reserved as well as special value 0x01ff, we have a small
2561 * heuristic to check for the new GPHY revision and re-arrange things
2562 * so the GPHY driver is happy.
487320c5 2563 */
b04a2f5b
FF		 2564 gphy_rev = reg & 0xffff;
2565
2566 /* This is the good old scheme, just GPHY major, no minor nor patch */
2567 if ((gphy_rev & 0xf0) != 0)
2568 priv->gphy_rev = gphy_rev << 8;
2569
2570 /* This is the new scheme, GPHY major rolls over with 0x10 = rev G0 */
2571 else if ((gphy_rev & 0xff00) != 0)
2572 priv->gphy_rev = gphy_rev;
2573
2574 /* This is reserved so should require special treatment */
2575 else if (gphy_rev == 0 || gphy_rev == 0x01ff) {
2576 pr_warn("Invalid GPHY revision detected: 0x%04x\n", gphy_rev);
2577 return;
2578 }
487320c5 2579
1c1008c7
FF		 2580#ifdef CONFIG_PHYS_ADDR_T_64BIT
2581 if (!(params->flags & GENET_HAS_40BITS))
2582 pr_warn("GENET does not support 40-bits PA\n");
2583#endif
2584
2585 pr_debug("Configuration for version: %d\n"
2586 "TXq: %1d, RXq: %1d, BDs: %1d\n"
2587 "BP << en: %2d, BP msk: 0x%05x\n"
2588 "HFB count: %2d, QTAQ msk: 0x%05x\n"
2589 "TBUF: 0x%04x, HFB: 0x%04x, HFBreg: 0x%04x\n"
2590 "RDMA: 0x%05x, TDMA: 0x%05x\n"
2591 "Words/BD: %d\n",
2592 priv->version,
2593 params->tx_queues, params->rx_queues, params->bds_cnt,
2594 params->bp_in_en_shift, params->bp_in_mask,
2595 params->hfb_filter_cnt, params->qtag_mask,
2596 params->tbuf_offset, params->hfb_offset,
2597 params->hfb_reg_offset,
2598 params->rdma_offset, params->tdma_offset,
2599 params->words_per_bd);
2600}
2601
2602static const struct of_device_id bcmgenet_match[] = {
2603 { .compatible = "brcm,genet-v1", .data = (void *)GENET_V1 },
2604 { .compatible = "brcm,genet-v2", .data = (void *)GENET_V2 },
2605 { .compatible = "brcm,genet-v3", .data = (void *)GENET_V3 },
2606 { .compatible = "brcm,genet-v4", .data = (void *)GENET_V4 },
2607 { },
2608};
2609
2610static int bcmgenet_probe(struct platform_device *pdev)
2611{
b0ba512e 2612 struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
1c1008c7 2613 struct device_node *dn = pdev->dev.of_node;
b0ba512e 2614 const struct of_device_id *of_id = NULL;
1c1008c7
FF		 2615 struct bcmgenet_priv *priv;
2616 struct net_device *dev;
2617 const void *macaddr;
2618 struct resource *r;
2619 int err = -EIO;
2620
2621 /* Up to GENET_MAX_MQ_CNT + 1 TX queues and a single RX queue */
2622 dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1, 1);
2623 if (!dev) {
2624 dev_err(&pdev->dev, "can't allocate net device\n");
2625 return -ENOMEM;
2626 }
2627
b0ba512e
PG		 2628 if (dn) {
2629 of_id = of_match_node(bcmgenet_match, dn);
2630 if (!of_id)
2631 return -EINVAL;
2632 }
1c1008c7
FF		 2633
2634 priv = netdev_priv(dev);
2635 priv->irq0 = platform_get_irq(pdev, 0);
2636 priv->irq1 = platform_get_irq(pdev, 1);
8562056f 2637 priv->wol_irq = platform_get_irq(pdev, 2);
1c1008c7
FF		 2638 if (!priv->irq0 || !priv->irq1) {
2639 dev_err(&pdev->dev, "can't find IRQs\n");
2640 err = -EINVAL;
2641 goto err;
2642 }
2643
b0ba512e
PG		 2644 if (dn) {
2645 macaddr = of_get_mac_address(dn);
2646 if (!macaddr) {
2647 dev_err(&pdev->dev, "can't find MAC address\n");
2648 err = -EINVAL;
2649 goto err;
2650 }
2651 } else {
2652 macaddr = pd->mac_address;
1c1008c7
FF		 2653 }
2654
2655 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
5343a10d
FE		 2656 priv->base = devm_ioremap_resource(&pdev->dev, r);
2657 if (IS_ERR(priv->base)) {
2658 err = PTR_ERR(priv->base);
1c1008c7
FF		 2659 goto err;
2660 }
2661
2662 SET_NETDEV_DEV(dev, &pdev->dev);
2663 dev_set_drvdata(&pdev->dev, dev);
2664 ether_addr_copy(dev->dev_addr, macaddr);
2665 dev->watchdog_timeo = 2 * HZ;
7ad24ea4 2666 dev->ethtool_ops = &bcmgenet_ethtool_ops;
1c1008c7
FF		 2667 dev->netdev_ops = &bcmgenet_netdev_ops;
2668 netif_napi_add(dev, &priv->napi, bcmgenet_poll, 64);
2669
2670 priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT);
2671
2672 /* Set hardware features */
2673 dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM |
2674 NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2675
8562056f
FF		 2676 /* Request the WOL interrupt and advertise suspend if available */
2677 priv->wol_irq_disabled = true;
2678 err = devm_request_irq(&pdev->dev, priv->wol_irq, bcmgenet_wol_isr, 0,
2679 dev->name, priv);
2680 if (!err)
2681 device_set_wakeup_capable(&pdev->dev, 1);
2682
1c1008c7
FF		 2683 /* Set the needed headroom to account for any possible
2684 * features enabling/disabling at runtime
2685 */
2686 dev->needed_headroom += 64;
2687
2688 netdev_boot_setup_check(dev);
2689
2690 priv->dev = dev;
2691 priv->pdev = pdev;
b0ba512e
PG		 2692 if (of_id)
2693 priv->version = (enum bcmgenet_version)of_id->data;
2694 else
2695 priv->version = pd->genet_version;
1c1008c7 2696
e4a60a93
FF		 2697 priv->clk = devm_clk_get(&priv->pdev->dev, "enet");
2698 if (IS_ERR(priv->clk))
2699 dev_warn(&priv->pdev->dev, "failed to get enet clock\n");
2700
2701 if (!IS_ERR(priv->clk))
2702 clk_prepare_enable(priv->clk);
2703
1c1008c7
FF		 2704 bcmgenet_set_hw_params(priv);
2705
1c1008c7
FF		 2706 /* Mii wait queue */
2707 init_waitqueue_head(&priv->wq);
2708 /* Always use RX_BUF_LENGTH (2KB) buffer for all chips */
2709 priv->rx_buf_len = RX_BUF_LENGTH;
2710 INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task);
2711
1c1008c7
FF		 2712 priv->clk_wol = devm_clk_get(&priv->pdev->dev, "enet-wol");
2713 if (IS_ERR(priv->clk_wol))
2714 dev_warn(&priv->pdev->dev, "failed to get enet-wol clock\n");
2715
6ef398ea
FF		 2716 priv->clk_eee = devm_clk_get(&priv->pdev->dev, "enet-eee");
2717 if (IS_ERR(priv->clk_eee)) {
2718 dev_warn(&priv->pdev->dev, "failed to get enet-eee clock\n");
2719 priv->clk_eee = NULL;
2720 }
2721
1c1008c7
FF		 2722 err = reset_umac(priv);
2723 if (err)
2724 goto err_clk_disable;
2725
2726 err = bcmgenet_mii_init(dev);
2727 if (err)
2728 goto err_clk_disable;
2729
2730 /* setup number of real queues + 1 (GENET_V1 has 0 hardware queues
2731 * just the ring 16 descriptor based TX
2732 */
2733 netif_set_real_num_tx_queues(priv->dev, priv->hw_params->tx_queues + 1);
2734 netif_set_real_num_rx_queues(priv->dev, priv->hw_params->rx_queues + 1);
2735
219575eb
FF		 2736 /* libphy will determine the link state */
2737 netif_carrier_off(dev);
2738
1c1008c7
FF		 2739 /* Turn off the main clock, WOL clock is handled separately */
2740 if (!IS_ERR(priv->clk))
2741 clk_disable_unprepare(priv->clk);
2742
0f50ce96
FF		 2743 err = register_netdev(dev);
2744 if (err)
2745 goto err;
2746
1c1008c7
FF		 2747 return err;
2748
2749err_clk_disable:
2750 if (!IS_ERR(priv->clk))
2751 clk_disable_unprepare(priv->clk);
2752err:
2753 free_netdev(dev);
2754 return err;
2755}
2756
2757static int bcmgenet_remove(struct platform_device *pdev)
2758{
2759 struct bcmgenet_priv *priv = dev_to_priv(&pdev->dev);
2760
2761 dev_set_drvdata(&pdev->dev, NULL);
2762 unregister_netdev(priv->dev);
2763 bcmgenet_mii_exit(priv->dev);
2764 free_netdev(priv->dev);
2765
2766 return 0;
2767}
2768
b6e978e5
FF		 2769#ifdef CONFIG_PM_SLEEP
2770static int bcmgenet_suspend(struct device *d)
2771{
2772 struct net_device *dev = dev_get_drvdata(d);
2773 struct bcmgenet_priv *priv = netdev_priv(dev);
2774 int ret;
2775
2776 if (!netif_running(dev))
2777 return 0;
2778
2779 bcmgenet_netif_stop(dev);
2780
cc013fb4
FF		 2781 phy_suspend(priv->phydev);
2782
b6e978e5
FF		 2783 netif_device_detach(dev);
2784
2785 /* Disable MAC receive */
2786 umac_enable_set(priv, CMD_RX_EN, false);
2787
2788 ret = bcmgenet_dma_teardown(priv);
2789 if (ret)
2790 return ret;
2791
2792 /* Disable MAC transmit. TX DMA disabled have to done before this */
2793 umac_enable_set(priv, CMD_TX_EN, false);
2794
2795 /* tx reclaim */
2796 bcmgenet_tx_reclaim_all(dev);
2797 bcmgenet_fini_dma(priv);
2798
8c90db72
FF		 2799 /* Prepare the device for Wake-on-LAN and switch to the slow clock */
2800 if (device_may_wakeup(d) && priv->wolopts) {
2801 bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
2802 clk_prepare_enable(priv->clk_wol);
2803 }
2804
b6e978e5
FF		 2805 /* Turn off the clocks */
2806 clk_disable_unprepare(priv->clk);
2807
2808 return 0;
2809}
2810
2811static int bcmgenet_resume(struct device *d)
2812{
2813 struct net_device *dev = dev_get_drvdata(d);
2814 struct bcmgenet_priv *priv = netdev_priv(dev);
2815 unsigned long dma_ctrl;
2816 int ret;
2817 u32 reg;
2818
2819 if (!netif_running(dev))
2820 return 0;
2821
2822 /* Turn on the clock */
2823 ret = clk_prepare_enable(priv->clk);
2824 if (ret)
2825 return ret;
2826
2827 bcmgenet_umac_reset(priv);
2828
2829 ret = init_umac(priv);
2830 if (ret)
2831 goto out_clk_disable;
2832
0a29b3da
TK		 2833 /* From WOL-enabled suspend, switch to regular clock */
2834 if (priv->wolopts)
2835 clk_disable_unprepare(priv->clk_wol);
2836
2837 phy_init_hw(priv->phydev);
2838 /* Speed settings must be restored */
dbd479db 2839 bcmgenet_mii_config(priv->dev, false);
8c90db72 2840
b6e978e5
FF		 2841 /* disable ethernet MAC while updating its registers */
2842 umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, false);
2843
2844 bcmgenet_set_hw_addr(priv, dev->dev_addr);
2845
2846 if (phy_is_internal(priv->phydev)) {
2847 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
2848 reg |= EXT_ENERGY_DET_MASK;
2849 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
2850 }
2851
98bb7399
FF		 2852 if (priv->wolopts)
2853 bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
2854
b6e978e5
FF		 2855 /* Disable RX/TX DMA and flush TX queues */
2856 dma_ctrl = bcmgenet_dma_disable(priv);
2857
2858 /* Reinitialize TDMA and RDMA and SW housekeeping */
2859 ret = bcmgenet_init_dma(priv);
2860 if (ret) {
2861 netdev_err(dev, "failed to initialize DMA\n");
2862 goto out_clk_disable;
2863 }
2864
2865 /* Always enable ring 16 - descriptor ring */
2866 bcmgenet_enable_dma(priv, dma_ctrl);
2867
2868 netif_device_attach(dev);
2869
cc013fb4
FF		 2870 phy_resume(priv->phydev);
2871
6ef398ea
FF		 2872 if (priv->eee.eee_enabled)
2873 bcmgenet_eee_enable_set(dev, true);
2874
b6e978e5
FF		 2875 bcmgenet_netif_start(dev);
2876
2877 return 0;
2878
2879out_clk_disable:
2880 clk_disable_unprepare(priv->clk);
2881 return ret;
2882}
2883#endif /* CONFIG_PM_SLEEP */
2884
2885static SIMPLE_DEV_PM_OPS(bcmgenet_pm_ops, bcmgenet_suspend, bcmgenet_resume);
2886
1c1008c7
FF		 2887static struct platform_driver bcmgenet_driver = {
2888 .probe = bcmgenet_probe,
2889 .remove = bcmgenet_remove,
2890 .driver = {
2891 .name = "bcmgenet",
1c1008c7 2892 .of_match_table = bcmgenet_match,
b6e978e5 2893 .pm = &bcmgenet_pm_ops,
1c1008c7
FF		 2894 },
2895};
2896module_platform_driver(bcmgenet_driver);
2897
2898MODULE_AUTHOR("Broadcom Corporation");
2899MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver");
2900MODULE_ALIAS("platform:bcmgenet");
2901MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)