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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / marvell / mv643xx_eth.c
blob3c8125cbc84dbc742a25272ba345e0527bc1cf14
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports
4 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com>
5 *
6 * Based on the 64360 driver from:
7 * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il>
8 * Rabeeh Khoury <rabeeh@marvell.com>
9 *
10 * Copyright (C) 2003 PMC-Sierra, Inc.,
11 * written by Manish Lachwani
12 *
13 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
14 *
15 * Copyright (C) 2004-2006 MontaVista Software, Inc.
16 * Dale Farnsworth <dale@farnsworth.org>
17 *
18 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com>
19 * <sjhill@realitydiluted.com>
20 *
21 * Copyright (C) 2007-2008 Marvell Semiconductor
22 * Lennert Buytenhek <buytenh@marvell.com>
23 *
24 * Copyright (C) 2013 Michael Stapelberg <michael@stapelberg.de>
25 */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/init.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/in.h>
32 #include <linux/ip.h>
33 #include <net/tso.h>
34 #include <linux/tcp.h>
35 #include <linux/udp.h>
36 #include <linux/etherdevice.h>
37 #include <linux/delay.h>
38 #include <linux/ethtool.h>
39 #include <linux/platform_device.h>
40 #include <linux/module.h>
41 #include <linux/kernel.h>
42 #include <linux/spinlock.h>
43 #include <linux/workqueue.h>
44 #include <linux/phy.h>
45 #include <linux/mv643xx_eth.h>
46 #include <linux/io.h>
47 #include <linux/interrupt.h>
48 #include <linux/types.h>
49 #include <linux/slab.h>
50 #include <linux/clk.h>
51 #include <linux/of.h>
52 #include <linux/of_irq.h>
53 #include <linux/of_net.h>
54 #include <linux/of_mdio.h>
55
56 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
57 static char mv643xx_eth_driver_version[] = "1.4";
58
59
60 /*
61 * Registers shared between all ports.
62 */
63 #define PHY_ADDR 0x0000
64 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
65 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
66 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
67 #define WINDOW_BAR_ENABLE 0x0290
68 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
69
70 /*
71 * Main per-port registers. These live at offset 0x0400 for
72 * port #0, 0x0800 for port #1, and 0x0c00 for port #2.
73 */
74 #define PORT_CONFIG 0x0000
75 #define UNICAST_PROMISCUOUS_MODE 0x00000001
76 #define PORT_CONFIG_EXT 0x0004
77 #define MAC_ADDR_LOW 0x0014
78 #define MAC_ADDR_HIGH 0x0018
79 #define SDMA_CONFIG 0x001c
80 #define TX_BURST_SIZE_16_64BIT 0x01000000
81 #define TX_BURST_SIZE_4_64BIT 0x00800000
82 #define BLM_TX_NO_SWAP 0x00000020
83 #define BLM_RX_NO_SWAP 0x00000010
84 #define RX_BURST_SIZE_16_64BIT 0x00000008
85 #define RX_BURST_SIZE_4_64BIT 0x00000004
86 #define PORT_SERIAL_CONTROL 0x003c
87 #define SET_MII_SPEED_TO_100 0x01000000
88 #define SET_GMII_SPEED_TO_1000 0x00800000
89 #define SET_FULL_DUPLEX_MODE 0x00200000
90 #define MAX_RX_PACKET_9700BYTE 0x000a0000
91 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000
92 #define DO_NOT_FORCE_LINK_FAIL 0x00000400
93 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200
94 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008
95 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004
96 #define FORCE_LINK_PASS 0x00000002
97 #define SERIAL_PORT_ENABLE 0x00000001
98 #define PORT_STATUS 0x0044
99 #define TX_FIFO_EMPTY 0x00000400
100 #define TX_IN_PROGRESS 0x00000080
101 #define PORT_SPEED_MASK 0x00000030
102 #define PORT_SPEED_1000 0x00000010
103 #define PORT_SPEED_100 0x00000020
104 #define PORT_SPEED_10 0x00000000
105 #define FLOW_CONTROL_ENABLED 0x00000008
106 #define FULL_DUPLEX 0x00000004
107 #define LINK_UP 0x00000002
108 #define TXQ_COMMAND 0x0048
109 #define TXQ_FIX_PRIO_CONF 0x004c
110 #define PORT_SERIAL_CONTROL1 0x004c
111 #define CLK125_BYPASS_EN 0x00000010
112 #define TX_BW_RATE 0x0050
113 #define TX_BW_MTU 0x0058
114 #define TX_BW_BURST 0x005c
115 #define INT_CAUSE 0x0060
116 #define INT_TX_END 0x07f80000
117 #define INT_TX_END_0 0x00080000
118 #define INT_RX 0x000003fc
119 #define INT_RX_0 0x00000004
120 #define INT_EXT 0x00000002
121 #define INT_CAUSE_EXT 0x0064
122 #define INT_EXT_LINK_PHY 0x00110000
123 #define INT_EXT_TX 0x000000ff
124 #define INT_MASK 0x0068
125 #define INT_MASK_EXT 0x006c
126 #define TX_FIFO_URGENT_THRESHOLD 0x0074
127 #define RX_DISCARD_FRAME_CNT 0x0084
128 #define RX_OVERRUN_FRAME_CNT 0x0088
129 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
130 #define TX_BW_RATE_MOVED 0x00e0
131 #define TX_BW_MTU_MOVED 0x00e8
132 #define TX_BW_BURST_MOVED 0x00ec
133 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
134 #define RXQ_COMMAND 0x0280
135 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
136 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
137 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
138 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
139
140 /*
141 * Misc per-port registers.
142 */
143 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
144 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
145 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
146 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
147
148
149 /*
150 * SDMA configuration register default value.
151 */
152 #if defined(__BIG_ENDIAN)
153 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
154 (RX_BURST_SIZE_4_64BIT | \
155 TX_BURST_SIZE_4_64BIT)
156 #elif defined(__LITTLE_ENDIAN)
157 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
158 (RX_BURST_SIZE_4_64BIT | \
159 BLM_RX_NO_SWAP | \
160 BLM_TX_NO_SWAP | \
161 TX_BURST_SIZE_4_64BIT)
162 #else
163 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
164 #endif
165
166
167 /*
168 * Misc definitions.
169 */
170 #define DEFAULT_RX_QUEUE_SIZE 128
171 #define DEFAULT_TX_QUEUE_SIZE 512
172 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
173
174 /* Max number of allowed TCP segments for software TSO */
175 #define MV643XX_MAX_TSO_SEGS 100
176 #define MV643XX_MAX_SKB_DESCS (MV643XX_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS)
177
178 #define IS_TSO_HEADER(txq, addr) \
179 ((addr >= txq->tso_hdrs_dma) && \
180 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE))
181
182 #define DESC_DMA_MAP_SINGLE 0
183 #define DESC_DMA_MAP_PAGE 1
184
185 /*
186 * RX/TX descriptors.
187 */
188 #if defined(__BIG_ENDIAN)
189 struct rx_desc {
190 u16 byte_cnt; /* Descriptor buffer byte count */
191 u16 buf_size; /* Buffer size */
192 u32 cmd_sts; /* Descriptor command status */
193 u32 next_desc_ptr; /* Next descriptor pointer */
194 u32 buf_ptr; /* Descriptor buffer pointer */
195 };
196
197 struct tx_desc {
198 u16 byte_cnt; /* buffer byte count */
199 u16 l4i_chk; /* CPU provided TCP checksum */
200 u32 cmd_sts; /* Command/status field */
201 u32 next_desc_ptr; /* Pointer to next descriptor */
202 u32 buf_ptr; /* pointer to buffer for this descriptor*/
203 };
204 #elif defined(__LITTLE_ENDIAN)
205 struct rx_desc {
206 u32 cmd_sts; /* Descriptor command status */
207 u16 buf_size; /* Buffer size */
208 u16 byte_cnt; /* Descriptor buffer byte count */
209 u32 buf_ptr; /* Descriptor buffer pointer */
210 u32 next_desc_ptr; /* Next descriptor pointer */
211 };
212
213 struct tx_desc {
214 u32 cmd_sts; /* Command/status field */
215 u16 l4i_chk; /* CPU provided TCP checksum */
216 u16 byte_cnt; /* buffer byte count */
217 u32 buf_ptr; /* pointer to buffer for this descriptor*/
218 u32 next_desc_ptr; /* Pointer to next descriptor */
219 };
220 #else
221 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
222 #endif
223
224 /* RX & TX descriptor command */
225 #define BUFFER_OWNED_BY_DMA 0x80000000
226
227 /* RX & TX descriptor status */
228 #define ERROR_SUMMARY 0x00000001
229
230 /* RX descriptor status */
231 #define LAYER_4_CHECKSUM_OK 0x40000000
232 #define RX_ENABLE_INTERRUPT 0x20000000
233 #define RX_FIRST_DESC 0x08000000
234 #define RX_LAST_DESC 0x04000000
235 #define RX_IP_HDR_OK 0x02000000
236 #define RX_PKT_IS_IPV4 0x01000000
237 #define RX_PKT_IS_ETHERNETV2 0x00800000
238 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
239 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
240 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
241
242 /* TX descriptor command */
243 #define TX_ENABLE_INTERRUPT 0x00800000
244 #define GEN_CRC 0x00400000
245 #define TX_FIRST_DESC 0x00200000
246 #define TX_LAST_DESC 0x00100000
247 #define ZERO_PADDING 0x00080000
248 #define GEN_IP_V4_CHECKSUM 0x00040000
249 #define GEN_TCP_UDP_CHECKSUM 0x00020000
250 #define UDP_FRAME 0x00010000
251 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
252 #define GEN_TCP_UDP_CHK_FULL 0x00000400
253 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
254
255 #define TX_IHL_SHIFT 11
256
257
258 /* global *******************************************************************/
259 struct mv643xx_eth_shared_private {
260 /*
261 * Ethernet controller base address.
262 */
263 void __iomem *base;
264
265 /*
266 * Per-port MBUS window access register value.
267 */
268 u32 win_protect;
269
270 /*
271 * Hardware-specific parameters.
272 */
273 int extended_rx_coal_limit;
274 int tx_bw_control;
275 int tx_csum_limit;
276 struct clk *clk;
277 };
278
279 #define TX_BW_CONTROL_ABSENT 0
280 #define TX_BW_CONTROL_OLD_LAYOUT 1
281 #define TX_BW_CONTROL_NEW_LAYOUT 2
282
283 static int mv643xx_eth_open(struct net_device *dev);
284 static int mv643xx_eth_stop(struct net_device *dev);
285
286
287 /* per-port *****************************************************************/
288 struct mib_counters {
289 u64 good_octets_received;
290 u32 bad_octets_received;
291 u32 internal_mac_transmit_err;
292 u32 good_frames_received;
293 u32 bad_frames_received;
294 u32 broadcast_frames_received;
295 u32 multicast_frames_received;
296 u32 frames_64_octets;
297 u32 frames_65_to_127_octets;
298 u32 frames_128_to_255_octets;
299 u32 frames_256_to_511_octets;
300 u32 frames_512_to_1023_octets;
301 u32 frames_1024_to_max_octets;
302 u64 good_octets_sent;
303 u32 good_frames_sent;
304 u32 excessive_collision;
305 u32 multicast_frames_sent;
306 u32 broadcast_frames_sent;
307 u32 unrec_mac_control_received;
308 u32 fc_sent;
309 u32 good_fc_received;
310 u32 bad_fc_received;
311 u32 undersize_received;
312 u32 fragments_received;
313 u32 oversize_received;
314 u32 jabber_received;
315 u32 mac_receive_error;
316 u32 bad_crc_event;
317 u32 collision;
318 u32 late_collision;
319 /* Non MIB hardware counters */
320 u32 rx_discard;
321 u32 rx_overrun;
322 };
323
324 struct rx_queue {
325 int index;
326
327 int rx_ring_size;
328
329 int rx_desc_count;
330 int rx_curr_desc;
331 int rx_used_desc;
332
333 struct rx_desc *rx_desc_area;
334 dma_addr_t rx_desc_dma;
335 int rx_desc_area_size;
336 struct sk_buff **rx_skb;
337 };
338
339 struct tx_queue {
340 int index;
341
342 int tx_ring_size;
343
344 int tx_desc_count;
345 int tx_curr_desc;
346 int tx_used_desc;
347
348 int tx_stop_threshold;
349 int tx_wake_threshold;
350
351 char *tso_hdrs;
352 dma_addr_t tso_hdrs_dma;
353
354 struct tx_desc *tx_desc_area;
355 char *tx_desc_mapping; /* array to track the type of the dma mapping */
356 dma_addr_t tx_desc_dma;
357 int tx_desc_area_size;
358
359 struct sk_buff_head tx_skb;
360
361 unsigned long tx_packets;
362 unsigned long tx_bytes;
363 unsigned long tx_dropped;
364 };
365
366 struct mv643xx_eth_private {
367 struct mv643xx_eth_shared_private *shared;
368 void __iomem *base;
369 int port_num;
370
371 struct net_device *dev;
372
373 struct timer_list mib_counters_timer;
374 spinlock_t mib_counters_lock;
375 struct mib_counters mib_counters;
376
377 struct work_struct tx_timeout_task;
378
379 struct napi_struct napi;
380 u32 int_mask;
381 u8 oom;
382 u8 work_link;
383 u8 work_tx;
384 u8 work_tx_end;
385 u8 work_rx;
386 u8 work_rx_refill;
387
388 int skb_size;
389
390 /*
391 * RX state.
392 */
393 int rx_ring_size;
394 unsigned long rx_desc_sram_addr;
395 int rx_desc_sram_size;
396 int rxq_count;
397 struct timer_list rx_oom;
398 struct rx_queue rxq[8];
399
400 /*
401 * TX state.
402 */
403 int tx_ring_size;
404 unsigned long tx_desc_sram_addr;
405 int tx_desc_sram_size;
406 int txq_count;
407 struct tx_queue txq[8];
408
409 /*
410 * Hardware-specific parameters.
411 */
412 struct clk *clk;
413 unsigned int t_clk;
414 };
415
416
417 /* port register accessors **************************************************/
418 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
419 {
420 return readl(mp->shared->base + offset);
421 }
422
423 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
424 {
425 return readl(mp->base + offset);
426 }
427
428 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
429 {
430 writel(data, mp->shared->base + offset);
431 }
432
433 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
434 {
435 writel(data, mp->base + offset);
436 }
437
438
439 /* rxq/txq helper functions *************************************************/
440 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
441 {
442 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
443 }
444
445 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
446 {
447 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
448 }
449
450 static void rxq_enable(struct rx_queue *rxq)
451 {
452 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
453 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
454 }
455
456 static void rxq_disable(struct rx_queue *rxq)
457 {
458 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
459 u8 mask = 1 << rxq->index;
460
461 wrlp(mp, RXQ_COMMAND, mask << 8);
462 while (rdlp(mp, RXQ_COMMAND) & mask)
463 udelay(10);
464 }
465
466 static void txq_reset_hw_ptr(struct tx_queue *txq)
467 {
468 struct mv643xx_eth_private *mp = txq_to_mp(txq);
469 u32 addr;
470
471 addr = (u32)txq->tx_desc_dma;
472 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
473 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
474 }
475
476 static void txq_enable(struct tx_queue *txq)
477 {
478 struct mv643xx_eth_private *mp = txq_to_mp(txq);
479 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
480 }
481
482 static void txq_disable(struct tx_queue *txq)
483 {
484 struct mv643xx_eth_private *mp = txq_to_mp(txq);
485 u8 mask = 1 << txq->index;
486
487 wrlp(mp, TXQ_COMMAND, mask << 8);
488 while (rdlp(mp, TXQ_COMMAND) & mask)
489 udelay(10);
490 }
491
492 static void txq_maybe_wake(struct tx_queue *txq)
493 {
494 struct mv643xx_eth_private *mp = txq_to_mp(txq);
495 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
496
497 if (netif_tx_queue_stopped(nq)) {
498 __netif_tx_lock(nq, smp_processor_id());
499 if (txq->tx_desc_count <= txq->tx_wake_threshold)
500 netif_tx_wake_queue(nq);
501 __netif_tx_unlock(nq);
502 }
503 }
504
505 static int rxq_process(struct rx_queue *rxq, int budget)
506 {
507 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
508 struct net_device_stats *stats = &mp->dev->stats;
509 int rx;
510
511 rx = 0;
512 while (rx < budget && rxq->rx_desc_count) {
513 struct rx_desc *rx_desc;
514 unsigned int cmd_sts;
515 struct sk_buff *skb;
516 u16 byte_cnt;
517
518 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
519
520 cmd_sts = rx_desc->cmd_sts;
521 if (cmd_sts & BUFFER_OWNED_BY_DMA)
522 break;
523 rmb();
524
525 skb = rxq->rx_skb[rxq->rx_curr_desc];
526 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
527
528 rxq->rx_curr_desc++;
529 if (rxq->rx_curr_desc == rxq->rx_ring_size)
530 rxq->rx_curr_desc = 0;
531
532 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
533 rx_desc->buf_size, DMA_FROM_DEVICE);
534 rxq->rx_desc_count--;
535 rx++;
536
537 mp->work_rx_refill |= 1 << rxq->index;
538
539 byte_cnt = rx_desc->byte_cnt;
540
541 /*
542 * Update statistics.
543 *
544 * Note that the descriptor byte count includes 2 dummy
545 * bytes automatically inserted by the hardware at the
546 * start of the packet (which we don't count), and a 4
547 * byte CRC at the end of the packet (which we do count).
548 */
549 stats->rx_packets++;
550 stats->rx_bytes += byte_cnt - 2;
551
552 /*
553 * In case we received a packet without first / last bits
554 * on, or the error summary bit is set, the packet needs
555 * to be dropped.
556 */
557 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
558 != (RX_FIRST_DESC | RX_LAST_DESC))
559 goto err;
560
561 /*
562 * The -4 is for the CRC in the trailer of the
563 * received packet
564 */
565 skb_put(skb, byte_cnt - 2 - 4);
566
567 if (cmd_sts & LAYER_4_CHECKSUM_OK)
568 skb->ip_summed = CHECKSUM_UNNECESSARY;
569 skb->protocol = eth_type_trans(skb, mp->dev);
570
571 napi_gro_receive(&mp->napi, skb);
572
573 continue;
574
575 err:
576 stats->rx_dropped++;
577
578 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
579 (RX_FIRST_DESC | RX_LAST_DESC)) {
580 if (net_ratelimit())
581 netdev_err(mp->dev,
582 "received packet spanning multiple descriptors\n");
583 }
584
585 if (cmd_sts & ERROR_SUMMARY)
586 stats->rx_errors++;
587
588 dev_kfree_skb(skb);
589 }
590
591 if (rx < budget)
592 mp->work_rx &= ~(1 << rxq->index);
593
594 return rx;
595 }
596
597 static int rxq_refill(struct rx_queue *rxq, int budget)
598 {
599 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
600 int refilled;
601
602 refilled = 0;
603 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
604 struct sk_buff *skb;
605 int rx;
606 struct rx_desc *rx_desc;
607 int size;
608
609 skb = netdev_alloc_skb(mp->dev, mp->skb_size);
610
611 if (skb == NULL) {
612 mp->oom = 1;
613 goto oom;
614 }
615
616 if (SKB_DMA_REALIGN)
617 skb_reserve(skb, SKB_DMA_REALIGN);
618
619 refilled++;
620 rxq->rx_desc_count++;
621
622 rx = rxq->rx_used_desc++;
623 if (rxq->rx_used_desc == rxq->rx_ring_size)
624 rxq->rx_used_desc = 0;
625
626 rx_desc = rxq->rx_desc_area + rx;
627
628 size = skb_end_pointer(skb) - skb->data;
629 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent,
630 skb->data, size,
631 DMA_FROM_DEVICE);
632 rx_desc->buf_size = size;
633 rxq->rx_skb[rx] = skb;
634 wmb();
635 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
636 wmb();
637
638 /*
639 * The hardware automatically prepends 2 bytes of
640 * dummy data to each received packet, so that the
641 * IP header ends up 16-byte aligned.
642 */
643 skb_reserve(skb, 2);
644 }
645
646 if (refilled < budget)
647 mp->work_rx_refill &= ~(1 << rxq->index);
648
649 oom:
650 return refilled;
651 }
652
653
654 /* tx ***********************************************************************/
655 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
656 {
657 int frag;
658
659 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
660 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
661
662 if (skb_frag_size(fragp) <= 8 && skb_frag_off(fragp) & 7)
663 return 1;
664 }
665
666 return 0;
667 }
668
669 static inline __be16 sum16_as_be(__sum16 sum)
670 {
671 return (__force __be16)sum;
672 }
673
674 static int skb_tx_csum(struct mv643xx_eth_private *mp, struct sk_buff *skb,
675 u16 *l4i_chk, u32 *command, int length)
676 {
677 int ret;
678 u32 cmd = 0;
679
680 if (skb->ip_summed == CHECKSUM_PARTIAL) {
681 int hdr_len;
682 int tag_bytes;
683
684 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
685 skb->protocol != htons(ETH_P_8021Q));
686
687 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
688 tag_bytes = hdr_len - ETH_HLEN;
689
690 if (length - hdr_len > mp->shared->tx_csum_limit ||
691 unlikely(tag_bytes & ~12)) {
692 ret = skb_checksum_help(skb);
693 if (!ret)
694 goto no_csum;
695 return ret;
696 }
697
698 if (tag_bytes & 4)
699 cmd |= MAC_HDR_EXTRA_4_BYTES;
700 if (tag_bytes & 8)
701 cmd |= MAC_HDR_EXTRA_8_BYTES;
702
703 cmd |= GEN_TCP_UDP_CHECKSUM | GEN_TCP_UDP_CHK_FULL |
704 GEN_IP_V4_CHECKSUM |
705 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
706
707 /* TODO: Revisit this. With the usage of GEN_TCP_UDP_CHK_FULL
708 * it seems we don't need to pass the initial checksum. */
709 switch (ip_hdr(skb)->protocol) {
710 case IPPROTO_UDP:
711 cmd |= UDP_FRAME;
712 *l4i_chk = 0;
713 break;
714 case IPPROTO_TCP:
715 *l4i_chk = 0;
716 break;
717 default:
718 WARN(1, "protocol not supported");
719 }
720 } else {
721 no_csum:
722 /* Errata BTS #50, IHL must be 5 if no HW checksum */
723 cmd |= 5 << TX_IHL_SHIFT;
724 }
725 *command = cmd;
726 return 0;
727 }
728
729 static inline int
730 txq_put_data_tso(struct net_device *dev, struct tx_queue *txq,
731 struct sk_buff *skb, char *data, int length,
732 bool last_tcp, bool is_last)
733 {
734 int tx_index;
735 u32 cmd_sts;
736 struct tx_desc *desc;
737
738 tx_index = txq->tx_curr_desc++;
739 if (txq->tx_curr_desc == txq->tx_ring_size)
740 txq->tx_curr_desc = 0;
741 desc = &txq->tx_desc_area[tx_index];
742 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE;
743
744 desc->l4i_chk = 0;
745 desc->byte_cnt = length;
746
747 if (length <= 8 && (uintptr_t)data & 0x7) {
748 /* Copy unaligned small data fragment to TSO header data area */
749 memcpy(txq->tso_hdrs + tx_index * TSO_HEADER_SIZE,
750 data, length);
751 desc->buf_ptr = txq->tso_hdrs_dma
752 + tx_index * TSO_HEADER_SIZE;
753 } else {
754 /* Alignment is okay, map buffer and hand off to hardware */
755 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE;
756 desc->buf_ptr = dma_map_single(dev->dev.parent, data,
757 length, DMA_TO_DEVICE);
758 if (unlikely(dma_mapping_error(dev->dev.parent,
759 desc->buf_ptr))) {
760 WARN(1, "dma_map_single failed!\n");
761 return -ENOMEM;
762 }
763 }
764
765 cmd_sts = BUFFER_OWNED_BY_DMA;
766 if (last_tcp) {
767 /* last descriptor in the TCP packet */
768 cmd_sts |= ZERO_PADDING | TX_LAST_DESC;
769 /* last descriptor in SKB */
770 if (is_last)
771 cmd_sts |= TX_ENABLE_INTERRUPT;
772 }
773 desc->cmd_sts = cmd_sts;
774 return 0;
775 }
776
777 static inline void
778 txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length,
779 u32 *first_cmd_sts, bool first_desc)
780 {
781 struct mv643xx_eth_private *mp = txq_to_mp(txq);
782 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
783 int tx_index;
784 struct tx_desc *desc;
785 int ret;
786 u32 cmd_csum = 0;
787 u16 l4i_chk = 0;
788 u32 cmd_sts;
789
790 tx_index = txq->tx_curr_desc;
791 desc = &txq->tx_desc_area[tx_index];
792
793 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_csum, length);
794 if (ret)
795 WARN(1, "failed to prepare checksum!");
796
797 /* Should we set this? Can't use the value from skb_tx_csum()
798 * as it's not the correct initial L4 checksum to use. */
799 desc->l4i_chk = 0;
800
801 desc->byte_cnt = hdr_len;
802 desc->buf_ptr = txq->tso_hdrs_dma +
803 txq->tx_curr_desc * TSO_HEADER_SIZE;
804 cmd_sts = cmd_csum | BUFFER_OWNED_BY_DMA | TX_FIRST_DESC |
805 GEN_CRC;
806
807 /* Defer updating the first command descriptor until all
808 * following descriptors have been written.
809 */
810 if (first_desc)
811 *first_cmd_sts = cmd_sts;
812 else
813 desc->cmd_sts = cmd_sts;
814
815 txq->tx_curr_desc++;
816 if (txq->tx_curr_desc == txq->tx_ring_size)
817 txq->tx_curr_desc = 0;
818 }
819
820 static int txq_submit_tso(struct tx_queue *txq, struct sk_buff *skb,
821 struct net_device *dev)
822 {
823 struct mv643xx_eth_private *mp = txq_to_mp(txq);
824 int total_len, data_left, ret;
825 int desc_count = 0;
826 struct tso_t tso;
827 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
828 struct tx_desc *first_tx_desc;
829 u32 first_cmd_sts = 0;
830
831 /* Count needed descriptors */
832 if ((txq->tx_desc_count + tso_count_descs(skb)) >= txq->tx_ring_size) {
833 netdev_dbg(dev, "not enough descriptors for TSO!\n");
834 return -EBUSY;
835 }
836
837 first_tx_desc = &txq->tx_desc_area[txq->tx_curr_desc];
838
839 /* Initialize the TSO handler, and prepare the first payload */
840 tso_start(skb, &tso);
841
842 total_len = skb->len - hdr_len;
843 while (total_len > 0) {
844 bool first_desc = (desc_count == 0);
845 char *hdr;
846
847 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len);
848 total_len -= data_left;
849 desc_count++;
850
851 /* prepare packet headers: MAC + IP + TCP */
852 hdr = txq->tso_hdrs + txq->tx_curr_desc * TSO_HEADER_SIZE;
853 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0);
854 txq_put_hdr_tso(skb, txq, data_left, &first_cmd_sts,
855 first_desc);
856
857 while (data_left > 0) {
858 int size;
859 desc_count++;
860
861 size = min_t(int, tso.size, data_left);
862 ret = txq_put_data_tso(dev, txq, skb, tso.data, size,
863 size == data_left,
864 total_len == 0);
865 if (ret)
866 goto err_release;
867 data_left -= size;
868 tso_build_data(skb, &tso, size);
869 }
870 }
871
872 __skb_queue_tail(&txq->tx_skb, skb);
873 skb_tx_timestamp(skb);
874
875 /* ensure all other descriptors are written before first cmd_sts */
876 wmb();
877 first_tx_desc->cmd_sts = first_cmd_sts;
878
879 /* clear TX_END status */
880 mp->work_tx_end &= ~(1 << txq->index);
881
882 /* ensure all descriptors are written before poking hardware */
883 wmb();
884 txq_enable(txq);
885 txq->tx_desc_count += desc_count;
886 return 0;
887 err_release:
888 /* TODO: Release all used data descriptors; header descriptors must not
889 * be DMA-unmapped.
890 */
891 return ret;
892 }
893
894 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
895 {
896 struct mv643xx_eth_private *mp = txq_to_mp(txq);
897 int nr_frags = skb_shinfo(skb)->nr_frags;
898 int frag;
899
900 for (frag = 0; frag < nr_frags; frag++) {
901 skb_frag_t *this_frag;
902 int tx_index;
903 struct tx_desc *desc;
904
905 this_frag = &skb_shinfo(skb)->frags[frag];
906 tx_index = txq->tx_curr_desc++;
907 if (txq->tx_curr_desc == txq->tx_ring_size)
908 txq->tx_curr_desc = 0;
909 desc = &txq->tx_desc_area[tx_index];
910 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_PAGE;
911
912 /*
913 * The last fragment will generate an interrupt
914 * which will free the skb on TX completion.
915 */
916 if (frag == nr_frags - 1) {
917 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
918 ZERO_PADDING | TX_LAST_DESC |
919 TX_ENABLE_INTERRUPT;
920 } else {
921 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
922 }
923
924 desc->l4i_chk = 0;
925 desc->byte_cnt = skb_frag_size(this_frag);
926 desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent,
927 this_frag, 0, desc->byte_cnt,
928 DMA_TO_DEVICE);
929 }
930 }
931
932 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb,
933 struct net_device *dev)
934 {
935 struct mv643xx_eth_private *mp = txq_to_mp(txq);
936 int nr_frags = skb_shinfo(skb)->nr_frags;
937 int tx_index;
938 struct tx_desc *desc;
939 u32 cmd_sts;
940 u16 l4i_chk;
941 int length, ret;
942
943 cmd_sts = 0;
944 l4i_chk = 0;
945
946 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
947 if (net_ratelimit())
948 netdev_err(dev, "tx queue full?!\n");
949 return -EBUSY;
950 }
951
952 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_sts, skb->len);
953 if (ret)
954 return ret;
955 cmd_sts |= TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
956
957 tx_index = txq->tx_curr_desc++;
958 if (txq->tx_curr_desc == txq->tx_ring_size)
959 txq->tx_curr_desc = 0;
960 desc = &txq->tx_desc_area[tx_index];
961 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE;
962
963 if (nr_frags) {
964 txq_submit_frag_skb(txq, skb);
965 length = skb_headlen(skb);
966 } else {
967 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
968 length = skb->len;
969 }
970
971 desc->l4i_chk = l4i_chk;
972 desc->byte_cnt = length;
973 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
974 length, DMA_TO_DEVICE);
975
976 __skb_queue_tail(&txq->tx_skb, skb);
977
978 skb_tx_timestamp(skb);
979
980 /* ensure all other descriptors are written before first cmd_sts */
981 wmb();
982 desc->cmd_sts = cmd_sts;
983
984 /* clear TX_END status */
985 mp->work_tx_end &= ~(1 << txq->index);
986
987 /* ensure all descriptors are written before poking hardware */
988 wmb();
989 txq_enable(txq);
990
991 txq->tx_desc_count += nr_frags + 1;
992
993 return 0;
994 }
995
996 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
997 {
998 struct mv643xx_eth_private *mp = netdev_priv(dev);
999 int length, queue, ret;
1000 struct tx_queue *txq;
1001 struct netdev_queue *nq;
1002
1003 queue = skb_get_queue_mapping(skb);
1004 txq = mp->txq + queue;
1005 nq = netdev_get_tx_queue(dev, queue);
1006
1007 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
1008 netdev_printk(KERN_DEBUG, dev,
1009 "failed to linearize skb with tiny unaligned fragment\n");
1010 return NETDEV_TX_BUSY;
1011 }
1012
1013 length = skb->len;
1014
1015 if (skb_is_gso(skb))
1016 ret = txq_submit_tso(txq, skb, dev);
1017 else
1018 ret = txq_submit_skb(txq, skb, dev);
1019 if (!ret) {
1020 txq->tx_bytes += length;
1021 txq->tx_packets++;
1022
1023 if (txq->tx_desc_count >= txq->tx_stop_threshold)
1024 netif_tx_stop_queue(nq);
1025 } else {
1026 txq->tx_dropped++;
1027 dev_kfree_skb_any(skb);
1028 }
1029
1030 return NETDEV_TX_OK;
1031 }
1032
1033
1034 /* tx napi ******************************************************************/
1035 static void txq_kick(struct tx_queue *txq)
1036 {
1037 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1038 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
1039 u32 hw_desc_ptr;
1040 u32 expected_ptr;
1041
1042 __netif_tx_lock(nq, smp_processor_id());
1043
1044 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
1045 goto out;
1046
1047 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
1048 expected_ptr = (u32)txq->tx_desc_dma +
1049 txq->tx_curr_desc * sizeof(struct tx_desc);
1050
1051 if (hw_desc_ptr != expected_ptr)
1052 txq_enable(txq);
1053
1054 out:
1055 __netif_tx_unlock(nq);
1056
1057 mp->work_tx_end &= ~(1 << txq->index);
1058 }
1059
1060 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
1061 {
1062 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1063 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
1064 int reclaimed;
1065
1066 __netif_tx_lock_bh(nq);
1067
1068 reclaimed = 0;
1069 while (reclaimed < budget && txq->tx_desc_count > 0) {
1070 int tx_index;
1071 struct tx_desc *desc;
1072 u32 cmd_sts;
1073 char desc_dma_map;
1074
1075 tx_index = txq->tx_used_desc;
1076 desc = &txq->tx_desc_area[tx_index];
1077 desc_dma_map = txq->tx_desc_mapping[tx_index];
1078
1079 cmd_sts = desc->cmd_sts;
1080
1081 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
1082 if (!force)
1083 break;
1084 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
1085 }
1086
1087 txq->tx_used_desc = tx_index + 1;
1088 if (txq->tx_used_desc == txq->tx_ring_size)
1089 txq->tx_used_desc = 0;
1090
1091 reclaimed++;
1092 txq->tx_desc_count--;
1093
1094 if (!IS_TSO_HEADER(txq, desc->buf_ptr)) {
1095
1096 if (desc_dma_map == DESC_DMA_MAP_PAGE)
1097 dma_unmap_page(mp->dev->dev.parent,
1098 desc->buf_ptr,
1099 desc->byte_cnt,
1100 DMA_TO_DEVICE);
1101 else
1102 dma_unmap_single(mp->dev->dev.parent,
1103 desc->buf_ptr,
1104 desc->byte_cnt,
1105 DMA_TO_DEVICE);
1106 }
1107
1108 if (cmd_sts & TX_ENABLE_INTERRUPT) {
1109 struct sk_buff *skb = __skb_dequeue(&txq->tx_skb);
1110
1111 if (!WARN_ON(!skb))
1112 dev_consume_skb_any(skb);
1113 }
1114
1115 if (cmd_sts & ERROR_SUMMARY) {
1116 netdev_info(mp->dev, "tx error\n");
1117 mp->dev->stats.tx_errors++;
1118 }
1119
1120 }
1121
1122 __netif_tx_unlock_bh(nq);
1123
1124 if (reclaimed < budget)
1125 mp->work_tx &= ~(1 << txq->index);
1126
1127 return reclaimed;
1128 }
1129
1130
1131 /* tx rate control **********************************************************/
1132 /*
1133 * Set total maximum TX rate (shared by all TX queues for this port)
1134 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
1135 */
1136 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
1137 {
1138 int token_rate;
1139 int mtu;
1140 int bucket_size;
1141
1142 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000);
1143 if (token_rate > 1023)
1144 token_rate = 1023;
1145
1146 mtu = (mp->dev->mtu + 255) >> 8;
1147 if (mtu > 63)
1148 mtu = 63;
1149
1150 bucket_size = (burst + 255) >> 8;
1151 if (bucket_size > 65535)
1152 bucket_size = 65535;
1153
1154 switch (mp->shared->tx_bw_control) {
1155 case TX_BW_CONTROL_OLD_LAYOUT:
1156 wrlp(mp, TX_BW_RATE, token_rate);
1157 wrlp(mp, TX_BW_MTU, mtu);
1158 wrlp(mp, TX_BW_BURST, bucket_size);
1159 break;
1160 case TX_BW_CONTROL_NEW_LAYOUT:
1161 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1162 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1163 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1164 break;
1165 }
1166 }
1167
1168 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1169 {
1170 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1171 int token_rate;
1172 int bucket_size;
1173
1174 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000);
1175 if (token_rate > 1023)
1176 token_rate = 1023;
1177
1178 bucket_size = (burst + 255) >> 8;
1179 if (bucket_size > 65535)
1180 bucket_size = 65535;
1181
1182 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1183 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1184 }
1185
1186 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1187 {
1188 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1189 int off;
1190 u32 val;
1191
1192 /*
1193 * Turn on fixed priority mode.
1194 */
1195 off = 0;
1196 switch (mp->shared->tx_bw_control) {
1197 case TX_BW_CONTROL_OLD_LAYOUT:
1198 off = TXQ_FIX_PRIO_CONF;
1199 break;
1200 case TX_BW_CONTROL_NEW_LAYOUT:
1201 off = TXQ_FIX_PRIO_CONF_MOVED;
1202 break;
1203 }
1204
1205 if (off) {
1206 val = rdlp(mp, off);
1207 val |= 1 << txq->index;
1208 wrlp(mp, off, val);
1209 }
1210 }
1211
1212
1213 /* mii management interface *************************************************/
1214 static void mv643xx_eth_adjust_link(struct net_device *dev)
1215 {
1216 struct mv643xx_eth_private *mp = netdev_priv(dev);
1217 u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
1218 u32 autoneg_disable = FORCE_LINK_PASS |
1219 DISABLE_AUTO_NEG_SPEED_GMII |
1220 DISABLE_AUTO_NEG_FOR_FLOW_CTRL |
1221 DISABLE_AUTO_NEG_FOR_DUPLEX;
1222
1223 if (dev->phydev->autoneg == AUTONEG_ENABLE) {
1224 /* enable auto negotiation */
1225 pscr &= ~autoneg_disable;
1226 goto out_write;
1227 }
1228
1229 pscr |= autoneg_disable;
1230
1231 if (dev->phydev->speed == SPEED_1000) {
1232 /* force gigabit, half duplex not supported */
1233 pscr |= SET_GMII_SPEED_TO_1000;
1234 pscr |= SET_FULL_DUPLEX_MODE;
1235 goto out_write;
1236 }
1237
1238 pscr &= ~SET_GMII_SPEED_TO_1000;
1239
1240 if (dev->phydev->speed == SPEED_100)
1241 pscr |= SET_MII_SPEED_TO_100;
1242 else
1243 pscr &= ~SET_MII_SPEED_TO_100;
1244
1245 if (dev->phydev->duplex == DUPLEX_FULL)
1246 pscr |= SET_FULL_DUPLEX_MODE;
1247 else
1248 pscr &= ~SET_FULL_DUPLEX_MODE;
1249
1250 out_write:
1251 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
1252 }
1253
1254 /* statistics ***************************************************************/
1255 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1256 {
1257 struct mv643xx_eth_private *mp = netdev_priv(dev);
1258 struct net_device_stats *stats = &dev->stats;
1259 unsigned long tx_packets = 0;
1260 unsigned long tx_bytes = 0;
1261 unsigned long tx_dropped = 0;
1262 int i;
1263
1264 for (i = 0; i < mp->txq_count; i++) {
1265 struct tx_queue *txq = mp->txq + i;
1266
1267 tx_packets += txq->tx_packets;
1268 tx_bytes += txq->tx_bytes;
1269 tx_dropped += txq->tx_dropped;
1270 }
1271
1272 stats->tx_packets = tx_packets;
1273 stats->tx_bytes = tx_bytes;
1274 stats->tx_dropped = tx_dropped;
1275
1276 return stats;
1277 }
1278
1279 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1280 {
1281 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1282 }
1283
1284 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1285 {
1286 int i;
1287
1288 for (i = 0; i < 0x80; i += 4)
1289 mib_read(mp, i);
1290
1291 /* Clear non MIB hw counters also */
1292 rdlp(mp, RX_DISCARD_FRAME_CNT);
1293 rdlp(mp, RX_OVERRUN_FRAME_CNT);
1294 }
1295
1296 static void mib_counters_update(struct mv643xx_eth_private *mp)
1297 {
1298 struct mib_counters *p = &mp->mib_counters;
1299
1300 spin_lock_bh(&mp->mib_counters_lock);
1301 p->good_octets_received += mib_read(mp, 0x00);
1302 p->bad_octets_received += mib_read(mp, 0x08);
1303 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1304 p->good_frames_received += mib_read(mp, 0x10);
1305 p->bad_frames_received += mib_read(mp, 0x14);
1306 p->broadcast_frames_received += mib_read(mp, 0x18);
1307 p->multicast_frames_received += mib_read(mp, 0x1c);
1308 p->frames_64_octets += mib_read(mp, 0x20);
1309 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1310 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1311 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1312 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1313 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1314 p->good_octets_sent += mib_read(mp, 0x38);
1315 p->good_frames_sent += mib_read(mp, 0x40);
1316 p->excessive_collision += mib_read(mp, 0x44);
1317 p->multicast_frames_sent += mib_read(mp, 0x48);
1318 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1319 p->unrec_mac_control_received += mib_read(mp, 0x50);
1320 p->fc_sent += mib_read(mp, 0x54);
1321 p->good_fc_received += mib_read(mp, 0x58);
1322 p->bad_fc_received += mib_read(mp, 0x5c);
1323 p->undersize_received += mib_read(mp, 0x60);
1324 p->fragments_received += mib_read(mp, 0x64);
1325 p->oversize_received += mib_read(mp, 0x68);
1326 p->jabber_received += mib_read(mp, 0x6c);
1327 p->mac_receive_error += mib_read(mp, 0x70);
1328 p->bad_crc_event += mib_read(mp, 0x74);
1329 p->collision += mib_read(mp, 0x78);
1330 p->late_collision += mib_read(mp, 0x7c);
1331 /* Non MIB hardware counters */
1332 p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT);
1333 p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT);
1334 spin_unlock_bh(&mp->mib_counters_lock);
1335 }
1336
1337 static void mib_counters_timer_wrapper(struct timer_list *t)
1338 {
1339 struct mv643xx_eth_private *mp = from_timer(mp, t, mib_counters_timer);
1340 mib_counters_update(mp);
1341 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1342 }
1343
1344
1345 /* interrupt coalescing *****************************************************/
1346 /*
1347 * Hardware coalescing parameters are set in units of 64 t_clk
1348 * cycles. I.e.:
1349 *
1350 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1351 *
1352 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1353 *
1354 * In the ->set*() methods, we round the computed register value
1355 * to the nearest integer.
1356 */
1357 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1358 {
1359 u32 val = rdlp(mp, SDMA_CONFIG);
1360 u64 temp;
1361
1362 if (mp->shared->extended_rx_coal_limit)
1363 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1364 else
1365 temp = (val & 0x003fff00) >> 8;
1366
1367 temp *= 64000000;
1368 temp += mp->t_clk / 2;
1369 do_div(temp, mp->t_clk);
1370
1371 return (unsigned int)temp;
1372 }
1373
1374 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1375 {
1376 u64 temp;
1377 u32 val;
1378
1379 temp = (u64)usec * mp->t_clk;
1380 temp += 31999999;
1381 do_div(temp, 64000000);
1382
1383 val = rdlp(mp, SDMA_CONFIG);
1384 if (mp->shared->extended_rx_coal_limit) {
1385 if (temp > 0xffff)
1386 temp = 0xffff;
1387 val &= ~0x023fff80;
1388 val |= (temp & 0x8000) << 10;
1389 val |= (temp & 0x7fff) << 7;
1390 } else {
1391 if (temp > 0x3fff)
1392 temp = 0x3fff;
1393 val &= ~0x003fff00;
1394 val |= (temp & 0x3fff) << 8;
1395 }
1396 wrlp(mp, SDMA_CONFIG, val);
1397 }
1398
1399 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1400 {
1401 u64 temp;
1402
1403 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1404 temp *= 64000000;
1405 temp += mp->t_clk / 2;
1406 do_div(temp, mp->t_clk);
1407
1408 return (unsigned int)temp;
1409 }
1410
1411 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1412 {
1413 u64 temp;
1414
1415 temp = (u64)usec * mp->t_clk;
1416 temp += 31999999;
1417 do_div(temp, 64000000);
1418
1419 if (temp > 0x3fff)
1420 temp = 0x3fff;
1421
1422 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1423 }
1424
1425
1426 /* ethtool ******************************************************************/
1427 struct mv643xx_eth_stats {
1428 char stat_string[ETH_GSTRING_LEN];
1429 int sizeof_stat;
1430 int netdev_off;
1431 int mp_off;
1432 };
1433
1434 #define SSTAT(m) \
1435 { #m, sizeof_field(struct net_device_stats, m), \
1436 offsetof(struct net_device, stats.m), -1 }
1437
1438 #define MIBSTAT(m) \
1439 { #m, sizeof_field(struct mib_counters, m), \
1440 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1441
1442 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1443 SSTAT(rx_packets),
1444 SSTAT(tx_packets),
1445 SSTAT(rx_bytes),
1446 SSTAT(tx_bytes),
1447 SSTAT(rx_errors),
1448 SSTAT(tx_errors),
1449 SSTAT(rx_dropped),
1450 SSTAT(tx_dropped),
1451 MIBSTAT(good_octets_received),
1452 MIBSTAT(bad_octets_received),
1453 MIBSTAT(internal_mac_transmit_err),
1454 MIBSTAT(good_frames_received),
1455 MIBSTAT(bad_frames_received),
1456 MIBSTAT(broadcast_frames_received),
1457 MIBSTAT(multicast_frames_received),
1458 MIBSTAT(frames_64_octets),
1459 MIBSTAT(frames_65_to_127_octets),
1460 MIBSTAT(frames_128_to_255_octets),
1461 MIBSTAT(frames_256_to_511_octets),
1462 MIBSTAT(frames_512_to_1023_octets),
1463 MIBSTAT(frames_1024_to_max_octets),
1464 MIBSTAT(good_octets_sent),
1465 MIBSTAT(good_frames_sent),
1466 MIBSTAT(excessive_collision),
1467 MIBSTAT(multicast_frames_sent),
1468 MIBSTAT(broadcast_frames_sent),
1469 MIBSTAT(unrec_mac_control_received),
1470 MIBSTAT(fc_sent),
1471 MIBSTAT(good_fc_received),
1472 MIBSTAT(bad_fc_received),
1473 MIBSTAT(undersize_received),
1474 MIBSTAT(fragments_received),
1475 MIBSTAT(oversize_received),
1476 MIBSTAT(jabber_received),
1477 MIBSTAT(mac_receive_error),
1478 MIBSTAT(bad_crc_event),
1479 MIBSTAT(collision),
1480 MIBSTAT(late_collision),
1481 MIBSTAT(rx_discard),
1482 MIBSTAT(rx_overrun),
1483 };
1484
1485 static int
1486 mv643xx_eth_get_link_ksettings_phy(struct mv643xx_eth_private *mp,
1487 struct ethtool_link_ksettings *cmd)
1488 {
1489 struct net_device *dev = mp->dev;
1490
1491 phy_ethtool_ksettings_get(dev->phydev, cmd);
1492
1493 /*
1494 * The MAC does not support 1000baseT_Half.
1495 */
1496 linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
1497 cmd->link_modes.supported);
1498 linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
1499 cmd->link_modes.advertising);
1500
1501 return 0;
1502 }
1503
1504 static int
1505 mv643xx_eth_get_link_ksettings_phyless(struct mv643xx_eth_private *mp,
1506 struct ethtool_link_ksettings *cmd)
1507 {
1508 u32 port_status;
1509 u32 supported, advertising;
1510
1511 port_status = rdlp(mp, PORT_STATUS);
1512
1513 supported = SUPPORTED_MII;
1514 advertising = ADVERTISED_MII;
1515 switch (port_status & PORT_SPEED_MASK) {
1516 case PORT_SPEED_10:
1517 cmd->base.speed = SPEED_10;
1518 break;
1519 case PORT_SPEED_100:
1520 cmd->base.speed = SPEED_100;
1521 break;
1522 case PORT_SPEED_1000:
1523 cmd->base.speed = SPEED_1000;
1524 break;
1525 default:
1526 cmd->base.speed = -1;
1527 break;
1528 }
1529 cmd->base.duplex = (port_status & FULL_DUPLEX) ?
1530 DUPLEX_FULL : DUPLEX_HALF;
1531 cmd->base.port = PORT_MII;
1532 cmd->base.phy_address = 0;
1533 cmd->base.autoneg = AUTONEG_DISABLE;
1534
1535 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1536 supported);
1537 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1538 advertising);
1539
1540 return 0;
1541 }
1542
1543 static void
1544 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1545 {
1546 wol->supported = 0;
1547 wol->wolopts = 0;
1548 if (dev->phydev)
1549 phy_ethtool_get_wol(dev->phydev, wol);
1550 }
1551
1552 static int
1553 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1554 {
1555 int err;
1556
1557 if (!dev->phydev)
1558 return -EOPNOTSUPP;
1559
1560 err = phy_ethtool_set_wol(dev->phydev, wol);
1561 /* Given that mv643xx_eth works without the marvell-specific PHY driver,
1562 * this debugging hint is useful to have.
1563 */
1564 if (err == -EOPNOTSUPP)
1565 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n");
1566 return err;
1567 }
1568
1569 static int
1570 mv643xx_eth_get_link_ksettings(struct net_device *dev,
1571 struct ethtool_link_ksettings *cmd)
1572 {
1573 struct mv643xx_eth_private *mp = netdev_priv(dev);
1574
1575 if (dev->phydev)
1576 return mv643xx_eth_get_link_ksettings_phy(mp, cmd);
1577 else
1578 return mv643xx_eth_get_link_ksettings_phyless(mp, cmd);
1579 }
1580
1581 static int
1582 mv643xx_eth_set_link_ksettings(struct net_device *dev,
1583 const struct ethtool_link_ksettings *cmd)
1584 {
1585 struct ethtool_link_ksettings c = *cmd;
1586 u32 advertising;
1587 int ret;
1588
1589 if (!dev->phydev)
1590 return -EINVAL;
1591
1592 /*
1593 * The MAC does not support 1000baseT_Half.
1594 */
1595 ethtool_convert_link_mode_to_legacy_u32(&advertising,
1596 c.link_modes.advertising);
1597 advertising &= ~ADVERTISED_1000baseT_Half;
1598 ethtool_convert_legacy_u32_to_link_mode(c.link_modes.advertising,
1599 advertising);
1600
1601 ret = phy_ethtool_ksettings_set(dev->phydev, &c);
1602 if (!ret)
1603 mv643xx_eth_adjust_link(dev);
1604 return ret;
1605 }
1606
1607 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1608 struct ethtool_drvinfo *drvinfo)
1609 {
1610 strlcpy(drvinfo->driver, mv643xx_eth_driver_name,
1611 sizeof(drvinfo->driver));
1612 strlcpy(drvinfo->version, mv643xx_eth_driver_version,
1613 sizeof(drvinfo->version));
1614 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
1615 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
1616 }
1617
1618 static int
1619 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1620 {
1621 struct mv643xx_eth_private *mp = netdev_priv(dev);
1622
1623 ec->rx_coalesce_usecs = get_rx_coal(mp);
1624 ec->tx_coalesce_usecs = get_tx_coal(mp);
1625
1626 return 0;
1627 }
1628
1629 static int
1630 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1631 {
1632 struct mv643xx_eth_private *mp = netdev_priv(dev);
1633
1634 set_rx_coal(mp, ec->rx_coalesce_usecs);
1635 set_tx_coal(mp, ec->tx_coalesce_usecs);
1636
1637 return 0;
1638 }
1639
1640 static void
1641 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1642 {
1643 struct mv643xx_eth_private *mp = netdev_priv(dev);
1644
1645 er->rx_max_pending = 4096;
1646 er->tx_max_pending = 4096;
1647
1648 er->rx_pending = mp->rx_ring_size;
1649 er->tx_pending = mp->tx_ring_size;
1650 }
1651
1652 static int
1653 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1654 {
1655 struct mv643xx_eth_private *mp = netdev_priv(dev);
1656
1657 if (er->rx_mini_pending || er->rx_jumbo_pending)
1658 return -EINVAL;
1659
1660 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1661 mp->tx_ring_size = clamp_t(unsigned int, er->tx_pending,
1662 MV643XX_MAX_SKB_DESCS * 2, 4096);
1663 if (mp->tx_ring_size != er->tx_pending)
1664 netdev_warn(dev, "TX queue size set to %u (requested %u)\n",
1665 mp->tx_ring_size, er->tx_pending);
1666
1667 if (netif_running(dev)) {
1668 mv643xx_eth_stop(dev);
1669 if (mv643xx_eth_open(dev)) {
1670 netdev_err(dev,
1671 "fatal error on re-opening device after ring param change\n");
1672 return -ENOMEM;
1673 }
1674 }
1675
1676 return 0;
1677 }
1678
1679
1680 static int
1681 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features)
1682 {
1683 struct mv643xx_eth_private *mp = netdev_priv(dev);
1684 bool rx_csum = features & NETIF_F_RXCSUM;
1685
1686 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1687
1688 return 0;
1689 }
1690
1691 static void mv643xx_eth_get_strings(struct net_device *dev,
1692 uint32_t stringset, uint8_t *data)
1693 {
1694 int i;
1695
1696 if (stringset == ETH_SS_STATS) {
1697 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1698 memcpy(data + i * ETH_GSTRING_LEN,
1699 mv643xx_eth_stats[i].stat_string,
1700 ETH_GSTRING_LEN);
1701 }
1702 }
1703 }
1704
1705 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1706 struct ethtool_stats *stats,
1707 uint64_t *data)
1708 {
1709 struct mv643xx_eth_private *mp = netdev_priv(dev);
1710 int i;
1711
1712 mv643xx_eth_get_stats(dev);
1713 mib_counters_update(mp);
1714
1715 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1716 const struct mv643xx_eth_stats *stat;
1717 void *p;
1718
1719 stat = mv643xx_eth_stats + i;
1720
1721 if (stat->netdev_off >= 0)
1722 p = ((void *)mp->dev) + stat->netdev_off;
1723 else
1724 p = ((void *)mp) + stat->mp_off;
1725
1726 data[i] = (stat->sizeof_stat == 8) ?
1727 *(uint64_t *)p : *(uint32_t *)p;
1728 }
1729 }
1730
1731 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1732 {
1733 if (sset == ETH_SS_STATS)
1734 return ARRAY_SIZE(mv643xx_eth_stats);
1735
1736 return -EOPNOTSUPP;
1737 }
1738
1739 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1740 .get_drvinfo = mv643xx_eth_get_drvinfo,
1741 .nway_reset = phy_ethtool_nway_reset,
1742 .get_link = ethtool_op_get_link,
1743 .get_coalesce = mv643xx_eth_get_coalesce,
1744 .set_coalesce = mv643xx_eth_set_coalesce,
1745 .get_ringparam = mv643xx_eth_get_ringparam,
1746 .set_ringparam = mv643xx_eth_set_ringparam,
1747 .get_strings = mv643xx_eth_get_strings,
1748 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1749 .get_sset_count = mv643xx_eth_get_sset_count,
1750 .get_ts_info = ethtool_op_get_ts_info,
1751 .get_wol = mv643xx_eth_get_wol,
1752 .set_wol = mv643xx_eth_set_wol,
1753 .get_link_ksettings = mv643xx_eth_get_link_ksettings,
1754 .set_link_ksettings = mv643xx_eth_set_link_ksettings,
1755 };
1756
1757
1758 /* address handling *********************************************************/
1759 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1760 {
1761 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1762 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1763
1764 addr[0] = (mac_h >> 24) & 0xff;
1765 addr[1] = (mac_h >> 16) & 0xff;
1766 addr[2] = (mac_h >> 8) & 0xff;
1767 addr[3] = mac_h & 0xff;
1768 addr[4] = (mac_l >> 8) & 0xff;
1769 addr[5] = mac_l & 0xff;
1770 }
1771
1772 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1773 {
1774 wrlp(mp, MAC_ADDR_HIGH,
1775 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1776 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1777 }
1778
1779 static u32 uc_addr_filter_mask(struct net_device *dev)
1780 {
1781 struct netdev_hw_addr *ha;
1782 u32 nibbles;
1783
1784 if (dev->flags & IFF_PROMISC)
1785 return 0;
1786
1787 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1788 netdev_for_each_uc_addr(ha, dev) {
1789 if (memcmp(dev->dev_addr, ha->addr, 5))
1790 return 0;
1791 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1792 return 0;
1793
1794 nibbles |= 1 << (ha->addr[5] & 0x0f);
1795 }
1796
1797 return nibbles;
1798 }
1799
1800 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1801 {
1802 struct mv643xx_eth_private *mp = netdev_priv(dev);
1803 u32 port_config;
1804 u32 nibbles;
1805 int i;
1806
1807 uc_addr_set(mp, dev->dev_addr);
1808
1809 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1810
1811 nibbles = uc_addr_filter_mask(dev);
1812 if (!nibbles) {
1813 port_config |= UNICAST_PROMISCUOUS_MODE;
1814 nibbles = 0xffff;
1815 }
1816
1817 for (i = 0; i < 16; i += 4) {
1818 int off = UNICAST_TABLE(mp->port_num) + i;
1819 u32 v;
1820
1821 v = 0;
1822 if (nibbles & 1)
1823 v |= 0x00000001;
1824 if (nibbles & 2)
1825 v |= 0x00000100;
1826 if (nibbles & 4)
1827 v |= 0x00010000;
1828 if (nibbles & 8)
1829 v |= 0x01000000;
1830 nibbles >>= 4;
1831
1832 wrl(mp, off, v);
1833 }
1834
1835 wrlp(mp, PORT_CONFIG, port_config);
1836 }
1837
1838 static int addr_crc(unsigned char *addr)
1839 {
1840 int crc = 0;
1841 int i;
1842
1843 for (i = 0; i < 6; i++) {
1844 int j;
1845
1846 crc = (crc ^ addr[i]) << 8;
1847 for (j = 7; j >= 0; j--) {
1848 if (crc & (0x100 << j))
1849 crc ^= 0x107 << j;
1850 }
1851 }
1852
1853 return crc;
1854 }
1855
1856 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1857 {
1858 struct mv643xx_eth_private *mp = netdev_priv(dev);
1859 u32 *mc_spec;
1860 u32 *mc_other;
1861 struct netdev_hw_addr *ha;
1862 int i;
1863
1864 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI))
1865 goto promiscuous;
1866
1867 /* Allocate both mc_spec and mc_other tables */
1868 mc_spec = kcalloc(128, sizeof(u32), GFP_ATOMIC);
1869 if (!mc_spec)
1870 goto promiscuous;
1871 mc_other = &mc_spec[64];
1872
1873 netdev_for_each_mc_addr(ha, dev) {
1874 u8 *a = ha->addr;
1875 u32 *table;
1876 u8 entry;
1877
1878 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1879 table = mc_spec;
1880 entry = a[5];
1881 } else {
1882 table = mc_other;
1883 entry = addr_crc(a);
1884 }
1885
1886 table[entry >> 2] |= 1 << (8 * (entry & 3));
1887 }
1888
1889 for (i = 0; i < 64; i++) {
1890 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1891 mc_spec[i]);
1892 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1893 mc_other[i]);
1894 }
1895
1896 kfree(mc_spec);
1897 return;
1898
1899 promiscuous:
1900 for (i = 0; i < 64; i++) {
1901 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1902 0x01010101u);
1903 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1904 0x01010101u);
1905 }
1906 }
1907
1908 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1909 {
1910 mv643xx_eth_program_unicast_filter(dev);
1911 mv643xx_eth_program_multicast_filter(dev);
1912 }
1913
1914 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1915 {
1916 struct sockaddr *sa = addr;
1917
1918 if (!is_valid_ether_addr(sa->sa_data))
1919 return -EADDRNOTAVAIL;
1920
1921 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1922
1923 netif_addr_lock_bh(dev);
1924 mv643xx_eth_program_unicast_filter(dev);
1925 netif_addr_unlock_bh(dev);
1926
1927 return 0;
1928 }
1929
1930
1931 /* rx/tx queue initialisation ***********************************************/
1932 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1933 {
1934 struct rx_queue *rxq = mp->rxq + index;
1935 struct rx_desc *rx_desc;
1936 int size;
1937 int i;
1938
1939 rxq->index = index;
1940
1941 rxq->rx_ring_size = mp->rx_ring_size;
1942
1943 rxq->rx_desc_count = 0;
1944 rxq->rx_curr_desc = 0;
1945 rxq->rx_used_desc = 0;
1946
1947 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1948
1949 if (index == 0 && size <= mp->rx_desc_sram_size) {
1950 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1951 mp->rx_desc_sram_size);
1952 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1953 } else {
1954 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1955 size, &rxq->rx_desc_dma,
1956 GFP_KERNEL);
1957 }
1958
1959 if (rxq->rx_desc_area == NULL) {
1960 netdev_err(mp->dev,
1961 "can't allocate rx ring (%d bytes)\n", size);
1962 goto out;
1963 }
1964 memset(rxq->rx_desc_area, 0, size);
1965
1966 rxq->rx_desc_area_size = size;
1967 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb),
1968 GFP_KERNEL);
1969 if (rxq->rx_skb == NULL)
1970 goto out_free;
1971
1972 rx_desc = rxq->rx_desc_area;
1973 for (i = 0; i < rxq->rx_ring_size; i++) {
1974 int nexti;
1975
1976 nexti = i + 1;
1977 if (nexti == rxq->rx_ring_size)
1978 nexti = 0;
1979
1980 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1981 nexti * sizeof(struct rx_desc);
1982 }
1983
1984 return 0;
1985
1986
1987 out_free:
1988 if (index == 0 && size <= mp->rx_desc_sram_size)
1989 iounmap(rxq->rx_desc_area);
1990 else
1991 dma_free_coherent(mp->dev->dev.parent, size,
1992 rxq->rx_desc_area,
1993 rxq->rx_desc_dma);
1994
1995 out:
1996 return -ENOMEM;
1997 }
1998
1999 static void rxq_deinit(struct rx_queue *rxq)
2000 {
2001 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
2002 int i;
2003
2004 rxq_disable(rxq);
2005
2006 for (i = 0; i < rxq->rx_ring_size; i++) {
2007 if (rxq->rx_skb[i]) {
2008 dev_consume_skb_any(rxq->rx_skb[i]);
2009 rxq->rx_desc_count--;
2010 }
2011 }
2012
2013 if (rxq->rx_desc_count) {
2014 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n",
2015 rxq->rx_desc_count);
2016 }
2017
2018 if (rxq->index == 0 &&
2019 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
2020 iounmap(rxq->rx_desc_area);
2021 else
2022 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
2023 rxq->rx_desc_area, rxq->rx_desc_dma);
2024
2025 kfree(rxq->rx_skb);
2026 }
2027
2028 static int txq_init(struct mv643xx_eth_private *mp, int index)
2029 {
2030 struct tx_queue *txq = mp->txq + index;
2031 struct tx_desc *tx_desc;
2032 int size;
2033 int ret;
2034 int i;
2035
2036 txq->index = index;
2037
2038 txq->tx_ring_size = mp->tx_ring_size;
2039
2040 /* A queue must always have room for at least one skb.
2041 * Therefore, stop the queue when the free entries reaches
2042 * the maximum number of descriptors per skb.
2043 */
2044 txq->tx_stop_threshold = txq->tx_ring_size - MV643XX_MAX_SKB_DESCS;
2045 txq->tx_wake_threshold = txq->tx_stop_threshold / 2;
2046
2047 txq->tx_desc_count = 0;
2048 txq->tx_curr_desc = 0;
2049 txq->tx_used_desc = 0;
2050
2051 size = txq->tx_ring_size * sizeof(struct tx_desc);
2052
2053 if (index == 0 && size <= mp->tx_desc_sram_size) {
2054 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
2055 mp->tx_desc_sram_size);
2056 txq->tx_desc_dma = mp->tx_desc_sram_addr;
2057 } else {
2058 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
2059 size, &txq->tx_desc_dma,
2060 GFP_KERNEL);
2061 }
2062
2063 if (txq->tx_desc_area == NULL) {
2064 netdev_err(mp->dev,
2065 "can't allocate tx ring (%d bytes)\n", size);
2066 return -ENOMEM;
2067 }
2068 memset(txq->tx_desc_area, 0, size);
2069
2070 txq->tx_desc_area_size = size;
2071
2072 tx_desc = txq->tx_desc_area;
2073 for (i = 0; i < txq->tx_ring_size; i++) {
2074 struct tx_desc *txd = tx_desc + i;
2075 int nexti;
2076
2077 nexti = i + 1;
2078 if (nexti == txq->tx_ring_size)
2079 nexti = 0;
2080
2081 txd->cmd_sts = 0;
2082 txd->next_desc_ptr = txq->tx_desc_dma +
2083 nexti * sizeof(struct tx_desc);
2084 }
2085
2086 txq->tx_desc_mapping = kcalloc(txq->tx_ring_size, sizeof(char),
2087 GFP_KERNEL);
2088 if (!txq->tx_desc_mapping) {
2089 ret = -ENOMEM;
2090 goto err_free_desc_area;
2091 }
2092
2093 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */
2094 txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent,
2095 txq->tx_ring_size * TSO_HEADER_SIZE,
2096 &txq->tso_hdrs_dma, GFP_KERNEL);
2097 if (txq->tso_hdrs == NULL) {
2098 ret = -ENOMEM;
2099 goto err_free_desc_mapping;
2100 }
2101 skb_queue_head_init(&txq->tx_skb);
2102
2103 return 0;
2104
2105 err_free_desc_mapping:
2106 kfree(txq->tx_desc_mapping);
2107 err_free_desc_area:
2108 if (index == 0 && size <= mp->tx_desc_sram_size)
2109 iounmap(txq->tx_desc_area);
2110 else
2111 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2112 txq->tx_desc_area, txq->tx_desc_dma);
2113 return ret;
2114 }
2115
2116 static void txq_deinit(struct tx_queue *txq)
2117 {
2118 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2119
2120 txq_disable(txq);
2121 txq_reclaim(txq, txq->tx_ring_size, 1);
2122
2123 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2124
2125 if (txq->index == 0 &&
2126 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2127 iounmap(txq->tx_desc_area);
2128 else
2129 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2130 txq->tx_desc_area, txq->tx_desc_dma);
2131 kfree(txq->tx_desc_mapping);
2132
2133 if (txq->tso_hdrs)
2134 dma_free_coherent(mp->dev->dev.parent,
2135 txq->tx_ring_size * TSO_HEADER_SIZE,
2136 txq->tso_hdrs, txq->tso_hdrs_dma);
2137 }
2138
2139
2140 /* netdev ops and related ***************************************************/
2141 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2142 {
2143 u32 int_cause;
2144 u32 int_cause_ext;
2145
2146 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
2147 if (int_cause == 0)
2148 return 0;
2149
2150 int_cause_ext = 0;
2151 if (int_cause & INT_EXT) {
2152 int_cause &= ~INT_EXT;
2153 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2154 }
2155
2156 if (int_cause) {
2157 wrlp(mp, INT_CAUSE, ~int_cause);
2158 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2159 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2160 mp->work_rx |= (int_cause & INT_RX) >> 2;
2161 }
2162
2163 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2164 if (int_cause_ext) {
2165 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2166 if (int_cause_ext & INT_EXT_LINK_PHY)
2167 mp->work_link = 1;
2168 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2169 }
2170
2171 return 1;
2172 }
2173
2174 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2175 {
2176 struct net_device *dev = (struct net_device *)dev_id;
2177 struct mv643xx_eth_private *mp = netdev_priv(dev);
2178
2179 if (unlikely(!mv643xx_eth_collect_events(mp)))
2180 return IRQ_NONE;
2181
2182 wrlp(mp, INT_MASK, 0);
2183 napi_schedule(&mp->napi);
2184
2185 return IRQ_HANDLED;
2186 }
2187
2188 static void handle_link_event(struct mv643xx_eth_private *mp)
2189 {
2190 struct net_device *dev = mp->dev;
2191 u32 port_status;
2192 int speed;
2193 int duplex;
2194 int fc;
2195
2196 port_status = rdlp(mp, PORT_STATUS);
2197 if (!(port_status & LINK_UP)) {
2198 if (netif_carrier_ok(dev)) {
2199 int i;
2200
2201 netdev_info(dev, "link down\n");
2202
2203 netif_carrier_off(dev);
2204
2205 for (i = 0; i < mp->txq_count; i++) {
2206 struct tx_queue *txq = mp->txq + i;
2207
2208 txq_reclaim(txq, txq->tx_ring_size, 1);
2209 txq_reset_hw_ptr(txq);
2210 }
2211 }
2212 return;
2213 }
2214
2215 switch (port_status & PORT_SPEED_MASK) {
2216 case PORT_SPEED_10:
2217 speed = 10;
2218 break;
2219 case PORT_SPEED_100:
2220 speed = 100;
2221 break;
2222 case PORT_SPEED_1000:
2223 speed = 1000;
2224 break;
2225 default:
2226 speed = -1;
2227 break;
2228 }
2229 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2230 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2231
2232 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n",
2233 speed, duplex ? "full" : "half", fc ? "en" : "dis");
2234
2235 if (!netif_carrier_ok(dev))
2236 netif_carrier_on(dev);
2237 }
2238
2239 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2240 {
2241 struct mv643xx_eth_private *mp;
2242 int work_done;
2243
2244 mp = container_of(napi, struct mv643xx_eth_private, napi);
2245
2246 if (unlikely(mp->oom)) {
2247 mp->oom = 0;
2248 del_timer(&mp->rx_oom);
2249 }
2250
2251 work_done = 0;
2252 while (work_done < budget) {
2253 u8 queue_mask;
2254 int queue;
2255 int work_tbd;
2256
2257 if (mp->work_link) {
2258 mp->work_link = 0;
2259 handle_link_event(mp);
2260 work_done++;
2261 continue;
2262 }
2263
2264 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2265 if (likely(!mp->oom))
2266 queue_mask |= mp->work_rx_refill;
2267
2268 if (!queue_mask) {
2269 if (mv643xx_eth_collect_events(mp))
2270 continue;
2271 break;
2272 }
2273
2274 queue = fls(queue_mask) - 1;
2275 queue_mask = 1 << queue;
2276
2277 work_tbd = budget - work_done;
2278 if (work_tbd > 16)
2279 work_tbd = 16;
2280
2281 if (mp->work_tx_end & queue_mask) {
2282 txq_kick(mp->txq + queue);
2283 } else if (mp->work_tx & queue_mask) {
2284 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2285 txq_maybe_wake(mp->txq + queue);
2286 } else if (mp->work_rx & queue_mask) {
2287 work_done += rxq_process(mp->rxq + queue, work_tbd);
2288 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2289 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2290 } else {
2291 BUG();
2292 }
2293 }
2294
2295 if (work_done < budget) {
2296 if (mp->oom)
2297 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2298 napi_complete_done(napi, work_done);
2299 wrlp(mp, INT_MASK, mp->int_mask);
2300 }
2301
2302 return work_done;
2303 }
2304
2305 static inline void oom_timer_wrapper(struct timer_list *t)
2306 {
2307 struct mv643xx_eth_private *mp = from_timer(mp, t, rx_oom);
2308
2309 napi_schedule(&mp->napi);
2310 }
2311
2312 static void port_start(struct mv643xx_eth_private *mp)
2313 {
2314 struct net_device *dev = mp->dev;
2315 u32 pscr;
2316 int i;
2317
2318 /*
2319 * Perform PHY reset, if there is a PHY.
2320 */
2321 if (dev->phydev) {
2322 struct ethtool_link_ksettings cmd;
2323
2324 mv643xx_eth_get_link_ksettings(dev, &cmd);
2325 phy_init_hw(dev->phydev);
2326 mv643xx_eth_set_link_ksettings(
2327 dev, (const struct ethtool_link_ksettings *)&cmd);
2328 phy_start(dev->phydev);
2329 }
2330
2331 /*
2332 * Configure basic link parameters.
2333 */
2334 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2335
2336 pscr |= SERIAL_PORT_ENABLE;
2337 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2338
2339 pscr |= DO_NOT_FORCE_LINK_FAIL;
2340 if (!dev->phydev)
2341 pscr |= FORCE_LINK_PASS;
2342 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2343
2344 /*
2345 * Configure TX path and queues.
2346 */
2347 tx_set_rate(mp, 1000000000, 16777216);
2348 for (i = 0; i < mp->txq_count; i++) {
2349 struct tx_queue *txq = mp->txq + i;
2350
2351 txq_reset_hw_ptr(txq);
2352 txq_set_rate(txq, 1000000000, 16777216);
2353 txq_set_fixed_prio_mode(txq);
2354 }
2355
2356 /*
2357 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2358 * frames to RX queue #0, and include the pseudo-header when
2359 * calculating receive checksums.
2360 */
2361 mv643xx_eth_set_features(mp->dev, mp->dev->features);
2362
2363 /*
2364 * Treat BPDUs as normal multicasts, and disable partition mode.
2365 */
2366 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2367
2368 /*
2369 * Add configured unicast addresses to address filter table.
2370 */
2371 mv643xx_eth_program_unicast_filter(mp->dev);
2372
2373 /*
2374 * Enable the receive queues.
2375 */
2376 for (i = 0; i < mp->rxq_count; i++) {
2377 struct rx_queue *rxq = mp->rxq + i;
2378 u32 addr;
2379
2380 addr = (u32)rxq->rx_desc_dma;
2381 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2382 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2383
2384 rxq_enable(rxq);
2385 }
2386 }
2387
2388 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2389 {
2390 int skb_size;
2391
2392 /*
2393 * Reserve 2+14 bytes for an ethernet header (the hardware
2394 * automatically prepends 2 bytes of dummy data to each
2395 * received packet), 16 bytes for up to four VLAN tags, and
2396 * 4 bytes for the trailing FCS -- 36 bytes total.
2397 */
2398 skb_size = mp->dev->mtu + 36;
2399
2400 /*
2401 * Make sure that the skb size is a multiple of 8 bytes, as
2402 * the lower three bits of the receive descriptor's buffer
2403 * size field are ignored by the hardware.
2404 */
2405 mp->skb_size = (skb_size + 7) & ~7;
2406
2407 /*
2408 * If NET_SKB_PAD is smaller than a cache line,
2409 * netdev_alloc_skb() will cause skb->data to be misaligned
2410 * to a cache line boundary. If this is the case, include
2411 * some extra space to allow re-aligning the data area.
2412 */
2413 mp->skb_size += SKB_DMA_REALIGN;
2414 }
2415
2416 static int mv643xx_eth_open(struct net_device *dev)
2417 {
2418 struct mv643xx_eth_private *mp = netdev_priv(dev);
2419 int err;
2420 int i;
2421
2422 wrlp(mp, INT_CAUSE, 0);
2423 wrlp(mp, INT_CAUSE_EXT, 0);
2424 rdlp(mp, INT_CAUSE_EXT);
2425
2426 err = request_irq(dev->irq, mv643xx_eth_irq,
2427 IRQF_SHARED, dev->name, dev);
2428 if (err) {
2429 netdev_err(dev, "can't assign irq\n");
2430 return -EAGAIN;
2431 }
2432
2433 mv643xx_eth_recalc_skb_size(mp);
2434
2435 napi_enable(&mp->napi);
2436
2437 mp->int_mask = INT_EXT;
2438
2439 for (i = 0; i < mp->rxq_count; i++) {
2440 err = rxq_init(mp, i);
2441 if (err) {
2442 while (--i >= 0)
2443 rxq_deinit(mp->rxq + i);
2444 goto out;
2445 }
2446
2447 rxq_refill(mp->rxq + i, INT_MAX);
2448 mp->int_mask |= INT_RX_0 << i;
2449 }
2450
2451 if (mp->oom) {
2452 mp->rx_oom.expires = jiffies + (HZ / 10);
2453 add_timer(&mp->rx_oom);
2454 }
2455
2456 for (i = 0; i < mp->txq_count; i++) {
2457 err = txq_init(mp, i);
2458 if (err) {
2459 while (--i >= 0)
2460 txq_deinit(mp->txq + i);
2461 goto out_free;
2462 }
2463 mp->int_mask |= INT_TX_END_0 << i;
2464 }
2465
2466 add_timer(&mp->mib_counters_timer);
2467 port_start(mp);
2468
2469 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2470 wrlp(mp, INT_MASK, mp->int_mask);
2471
2472 return 0;
2473
2474
2475 out_free:
2476 for (i = 0; i < mp->rxq_count; i++)
2477 rxq_deinit(mp->rxq + i);
2478 out:
2479 free_irq(dev->irq, dev);
2480
2481 return err;
2482 }
2483
2484 static void port_reset(struct mv643xx_eth_private *mp)
2485 {
2486 unsigned int data;
2487 int i;
2488
2489 for (i = 0; i < mp->rxq_count; i++)
2490 rxq_disable(mp->rxq + i);
2491 for (i = 0; i < mp->txq_count; i++)
2492 txq_disable(mp->txq + i);
2493
2494 while (1) {
2495 u32 ps = rdlp(mp, PORT_STATUS);
2496
2497 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2498 break;
2499 udelay(10);
2500 }
2501
2502 /* Reset the Enable bit in the Configuration Register */
2503 data = rdlp(mp, PORT_SERIAL_CONTROL);
2504 data &= ~(SERIAL_PORT_ENABLE |
2505 DO_NOT_FORCE_LINK_FAIL |
2506 FORCE_LINK_PASS);
2507 wrlp(mp, PORT_SERIAL_CONTROL, data);
2508 }
2509
2510 static int mv643xx_eth_stop(struct net_device *dev)
2511 {
2512 struct mv643xx_eth_private *mp = netdev_priv(dev);
2513 int i;
2514
2515 wrlp(mp, INT_MASK_EXT, 0x00000000);
2516 wrlp(mp, INT_MASK, 0x00000000);
2517 rdlp(mp, INT_MASK);
2518
2519 napi_disable(&mp->napi);
2520
2521 del_timer_sync(&mp->rx_oom);
2522
2523 netif_carrier_off(dev);
2524 if (dev->phydev)
2525 phy_stop(dev->phydev);
2526 free_irq(dev->irq, dev);
2527
2528 port_reset(mp);
2529 mv643xx_eth_get_stats(dev);
2530 mib_counters_update(mp);
2531 del_timer_sync(&mp->mib_counters_timer);
2532
2533 for (i = 0; i < mp->rxq_count; i++)
2534 rxq_deinit(mp->rxq + i);
2535 for (i = 0; i < mp->txq_count; i++)
2536 txq_deinit(mp->txq + i);
2537
2538 return 0;
2539 }
2540
2541 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2542 {
2543 int ret;
2544
2545 if (!dev->phydev)
2546 return -ENOTSUPP;
2547
2548 ret = phy_mii_ioctl(dev->phydev, ifr, cmd);
2549 if (!ret)
2550 mv643xx_eth_adjust_link(dev);
2551 return ret;
2552 }
2553
2554 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2555 {
2556 struct mv643xx_eth_private *mp = netdev_priv(dev);
2557
2558 dev->mtu = new_mtu;
2559 mv643xx_eth_recalc_skb_size(mp);
2560 tx_set_rate(mp, 1000000000, 16777216);
2561
2562 if (!netif_running(dev))
2563 return 0;
2564
2565 /*
2566 * Stop and then re-open the interface. This will allocate RX
2567 * skbs of the new MTU.
2568 * There is a possible danger that the open will not succeed,
2569 * due to memory being full.
2570 */
2571 mv643xx_eth_stop(dev);
2572 if (mv643xx_eth_open(dev)) {
2573 netdev_err(dev,
2574 "fatal error on re-opening device after MTU change\n");
2575 }
2576
2577 return 0;
2578 }
2579
2580 static void tx_timeout_task(struct work_struct *ugly)
2581 {
2582 struct mv643xx_eth_private *mp;
2583
2584 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2585 if (netif_running(mp->dev)) {
2586 netif_tx_stop_all_queues(mp->dev);
2587 port_reset(mp);
2588 port_start(mp);
2589 netif_tx_wake_all_queues(mp->dev);
2590 }
2591 }
2592
2593 static void mv643xx_eth_tx_timeout(struct net_device *dev, unsigned int txqueue)
2594 {
2595 struct mv643xx_eth_private *mp = netdev_priv(dev);
2596
2597 netdev_info(dev, "tx timeout\n");
2598
2599 schedule_work(&mp->tx_timeout_task);
2600 }
2601
2602 #ifdef CONFIG_NET_POLL_CONTROLLER
2603 static void mv643xx_eth_netpoll(struct net_device *dev)
2604 {
2605 struct mv643xx_eth_private *mp = netdev_priv(dev);
2606
2607 wrlp(mp, INT_MASK, 0x00000000);
2608 rdlp(mp, INT_MASK);
2609
2610 mv643xx_eth_irq(dev->irq, dev);
2611
2612 wrlp(mp, INT_MASK, mp->int_mask);
2613 }
2614 #endif
2615
2616
2617 /* platform glue ************************************************************/
2618 static void
2619 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2620 const struct mbus_dram_target_info *dram)
2621 {
2622 void __iomem *base = msp->base;
2623 u32 win_enable;
2624 u32 win_protect;
2625 int i;
2626
2627 for (i = 0; i < 6; i++) {
2628 writel(0, base + WINDOW_BASE(i));
2629 writel(0, base + WINDOW_SIZE(i));
2630 if (i < 4)
2631 writel(0, base + WINDOW_REMAP_HIGH(i));
2632 }
2633
2634 win_enable = 0x3f;
2635 win_protect = 0;
2636
2637 for (i = 0; i < dram->num_cs; i++) {
2638 const struct mbus_dram_window *cs = dram->cs + i;
2639
2640 writel((cs->base & 0xffff0000) |
2641 (cs->mbus_attr << 8) |
2642 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2643 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2644
2645 win_enable &= ~(1 << i);
2646 win_protect |= 3 << (2 * i);
2647 }
2648
2649 writel(win_enable, base + WINDOW_BAR_ENABLE);
2650 msp->win_protect = win_protect;
2651 }
2652
2653 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2654 {
2655 /*
2656 * Check whether we have a 14-bit coal limit field in bits
2657 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2658 * SDMA config register.
2659 */
2660 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2661 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2662 msp->extended_rx_coal_limit = 1;
2663 else
2664 msp->extended_rx_coal_limit = 0;
2665
2666 /*
2667 * Check whether the MAC supports TX rate control, and if
2668 * yes, whether its associated registers are in the old or
2669 * the new place.
2670 */
2671 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2672 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2673 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2674 } else {
2675 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2676 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2677 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2678 else
2679 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2680 }
2681 }
2682
2683 #if defined(CONFIG_OF)
2684 static const struct of_device_id mv643xx_eth_shared_ids[] = {
2685 { .compatible = "marvell,orion-eth", },
2686 { .compatible = "marvell,kirkwood-eth", },
2687 { }
2688 };
2689 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids);
2690 #endif
2691
2692 #if defined(CONFIG_OF_IRQ) && !defined(CONFIG_MV64X60)
2693 #define mv643xx_eth_property(_np, _name, _v) \
2694 do { \
2695 u32 tmp; \
2696 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \
2697 _v = tmp; \
2698 } while (0)
2699
2700 static struct platform_device *port_platdev[3];
2701
2702 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev,
2703 struct device_node *pnp)
2704 {
2705 struct platform_device *ppdev;
2706 struct mv643xx_eth_platform_data ppd;
2707 struct resource res;
2708 const char *mac_addr;
2709 int ret;
2710 int dev_num = 0;
2711
2712 memset(&ppd, 0, sizeof(ppd));
2713 ppd.shared = pdev;
2714
2715 memset(&res, 0, sizeof(res));
2716 if (of_irq_to_resource(pnp, 0, &res) <= 0) {
2717 dev_err(&pdev->dev, "missing interrupt on %pOFn\n", pnp);
2718 return -EINVAL;
2719 }
2720
2721 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) {
2722 dev_err(&pdev->dev, "missing reg property on %pOFn\n", pnp);
2723 return -EINVAL;
2724 }
2725
2726 if (ppd.port_number >= 3) {
2727 dev_err(&pdev->dev, "invalid reg property on %pOFn\n", pnp);
2728 return -EINVAL;
2729 }
2730
2731 while (dev_num < 3 && port_platdev[dev_num])
2732 dev_num++;
2733
2734 if (dev_num == 3) {
2735 dev_err(&pdev->dev, "too many ports registered\n");
2736 return -EINVAL;
2737 }
2738
2739 mac_addr = of_get_mac_address(pnp);
2740 if (!IS_ERR(mac_addr))
2741 ether_addr_copy(ppd.mac_addr, mac_addr);
2742
2743 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size);
2744 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr);
2745 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size);
2746 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size);
2747 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr);
2748 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size);
2749
2750 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0);
2751 if (!ppd.phy_node) {
2752 ppd.phy_addr = MV643XX_ETH_PHY_NONE;
2753 of_property_read_u32(pnp, "speed", &ppd.speed);
2754 of_property_read_u32(pnp, "duplex", &ppd.duplex);
2755 }
2756
2757 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num);
2758 if (!ppdev)
2759 return -ENOMEM;
2760 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
2761 ppdev->dev.of_node = pnp;
2762
2763 ret = platform_device_add_resources(ppdev, &res, 1);
2764 if (ret)
2765 goto port_err;
2766
2767 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd));
2768 if (ret)
2769 goto port_err;
2770
2771 ret = platform_device_add(ppdev);
2772 if (ret)
2773 goto port_err;
2774
2775 port_platdev[dev_num] = ppdev;
2776
2777 return 0;
2778
2779 port_err:
2780 platform_device_put(ppdev);
2781 return ret;
2782 }
2783
2784 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev)
2785 {
2786 struct mv643xx_eth_shared_platform_data *pd;
2787 struct device_node *pnp, *np = pdev->dev.of_node;
2788 int ret;
2789
2790 /* bail out if not registered from DT */
2791 if (!np)
2792 return 0;
2793
2794 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL);
2795 if (!pd)
2796 return -ENOMEM;
2797 pdev->dev.platform_data = pd;
2798
2799 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit);
2800
2801 for_each_available_child_of_node(np, pnp) {
2802 ret = mv643xx_eth_shared_of_add_port(pdev, pnp);
2803 if (ret) {
2804 of_node_put(pnp);
2805 return ret;
2806 }
2807 }
2808 return 0;
2809 }
2810
2811 static void mv643xx_eth_shared_of_remove(void)
2812 {
2813 int n;
2814
2815 for (n = 0; n < 3; n++) {
2816 platform_device_del(port_platdev[n]);
2817 port_platdev[n] = NULL;
2818 }
2819 }
2820 #else
2821 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev)
2822 {
2823 return 0;
2824 }
2825
2826 static inline void mv643xx_eth_shared_of_remove(void)
2827 {
2828 }
2829 #endif
2830
2831 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2832 {
2833 static int mv643xx_eth_version_printed;
2834 struct mv643xx_eth_shared_platform_data *pd;
2835 struct mv643xx_eth_shared_private *msp;
2836 const struct mbus_dram_target_info *dram;
2837 struct resource *res;
2838 int ret;
2839
2840 if (!mv643xx_eth_version_printed++)
2841 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n",
2842 mv643xx_eth_driver_version);
2843
2844 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2845 if (res == NULL)
2846 return -EINVAL;
2847
2848 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL);
2849 if (msp == NULL)
2850 return -ENOMEM;
2851 platform_set_drvdata(pdev, msp);
2852
2853 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
2854 if (msp->base == NULL)
2855 return -ENOMEM;
2856
2857 msp->clk = devm_clk_get(&pdev->dev, NULL);
2858 if (!IS_ERR(msp->clk))
2859 clk_prepare_enable(msp->clk);
2860
2861 /*
2862 * (Re-)program MBUS remapping windows if we are asked to.
2863 */
2864 dram = mv_mbus_dram_info();
2865 if (dram)
2866 mv643xx_eth_conf_mbus_windows(msp, dram);
2867
2868 ret = mv643xx_eth_shared_of_probe(pdev);
2869 if (ret)
2870 goto err_put_clk;
2871 pd = dev_get_platdata(&pdev->dev);
2872
2873 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
2874 pd->tx_csum_limit : 9 * 1024;
2875 infer_hw_params(msp);
2876
2877 return 0;
2878
2879 err_put_clk:
2880 if (!IS_ERR(msp->clk))
2881 clk_disable_unprepare(msp->clk);
2882 return ret;
2883 }
2884
2885 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2886 {
2887 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2888
2889 mv643xx_eth_shared_of_remove();
2890 if (!IS_ERR(msp->clk))
2891 clk_disable_unprepare(msp->clk);
2892 return 0;
2893 }
2894
2895 static struct platform_driver mv643xx_eth_shared_driver = {
2896 .probe = mv643xx_eth_shared_probe,
2897 .remove = mv643xx_eth_shared_remove,
2898 .driver = {
2899 .name = MV643XX_ETH_SHARED_NAME,
2900 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids),
2901 },
2902 };
2903
2904 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2905 {
2906 int addr_shift = 5 * mp->port_num;
2907 u32 data;
2908
2909 data = rdl(mp, PHY_ADDR);
2910 data &= ~(0x1f << addr_shift);
2911 data |= (phy_addr & 0x1f) << addr_shift;
2912 wrl(mp, PHY_ADDR, data);
2913 }
2914
2915 static int phy_addr_get(struct mv643xx_eth_private *mp)
2916 {
2917 unsigned int data;
2918
2919 data = rdl(mp, PHY_ADDR);
2920
2921 return (data >> (5 * mp->port_num)) & 0x1f;
2922 }
2923
2924 static void set_params(struct mv643xx_eth_private *mp,
2925 struct mv643xx_eth_platform_data *pd)
2926 {
2927 struct net_device *dev = mp->dev;
2928 unsigned int tx_ring_size;
2929
2930 if (is_valid_ether_addr(pd->mac_addr))
2931 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
2932 else
2933 uc_addr_get(mp, dev->dev_addr);
2934
2935 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2936 if (pd->rx_queue_size)
2937 mp->rx_ring_size = pd->rx_queue_size;
2938 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2939 mp->rx_desc_sram_size = pd->rx_sram_size;
2940
2941 mp->rxq_count = pd->rx_queue_count ? : 1;
2942
2943 tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2944 if (pd->tx_queue_size)
2945 tx_ring_size = pd->tx_queue_size;
2946
2947 mp->tx_ring_size = clamp_t(unsigned int, tx_ring_size,
2948 MV643XX_MAX_SKB_DESCS * 2, 4096);
2949 if (mp->tx_ring_size != tx_ring_size)
2950 netdev_warn(dev, "TX queue size set to %u (requested %u)\n",
2951 mp->tx_ring_size, tx_ring_size);
2952
2953 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2954 mp->tx_desc_sram_size = pd->tx_sram_size;
2955
2956 mp->txq_count = pd->tx_queue_count ? : 1;
2957 }
2958
2959 static int get_phy_mode(struct mv643xx_eth_private *mp)
2960 {
2961 struct device *dev = mp->dev->dev.parent;
2962 phy_interface_t iface;
2963 int err;
2964
2965 if (dev->of_node)
2966 err = of_get_phy_mode(dev->of_node, &iface);
2967
2968 /* Historical default if unspecified. We could also read/write
2969 * the interface state in the PSC1
2970 */
2971 if (!dev->of_node || err)
2972 iface = PHY_INTERFACE_MODE_GMII;
2973 return iface;
2974 }
2975
2976 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2977 int phy_addr)
2978 {
2979 struct phy_device *phydev;
2980 int start;
2981 int num;
2982 int i;
2983 char phy_id[MII_BUS_ID_SIZE + 3];
2984
2985 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2986 start = phy_addr_get(mp) & 0x1f;
2987 num = 32;
2988 } else {
2989 start = phy_addr & 0x1f;
2990 num = 1;
2991 }
2992
2993 /* Attempt to connect to the PHY using orion-mdio */
2994 phydev = ERR_PTR(-ENODEV);
2995 for (i = 0; i < num; i++) {
2996 int addr = (start + i) & 0x1f;
2997
2998 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
2999 "orion-mdio-mii", addr);
3000
3001 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link,
3002 get_phy_mode(mp));
3003 if (!IS_ERR(phydev)) {
3004 phy_addr_set(mp, addr);
3005 break;
3006 }
3007 }
3008
3009 return phydev;
3010 }
3011
3012 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
3013 {
3014 struct net_device *dev = mp->dev;
3015 struct phy_device *phy = dev->phydev;
3016
3017 if (speed == 0) {
3018 phy->autoneg = AUTONEG_ENABLE;
3019 phy->speed = 0;
3020 phy->duplex = 0;
3021 linkmode_copy(phy->advertising, phy->supported);
3022 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3023 phy->advertising);
3024 } else {
3025 phy->autoneg = AUTONEG_DISABLE;
3026 linkmode_zero(phy->advertising);
3027 phy->speed = speed;
3028 phy->duplex = duplex;
3029 }
3030 phy_start_aneg(phy);
3031 }
3032
3033 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
3034 {
3035 struct net_device *dev = mp->dev;
3036 u32 pscr;
3037
3038 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
3039 if (pscr & SERIAL_PORT_ENABLE) {
3040 pscr &= ~SERIAL_PORT_ENABLE;
3041 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
3042 }
3043
3044 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
3045 if (!dev->phydev) {
3046 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
3047 if (speed == SPEED_1000)
3048 pscr |= SET_GMII_SPEED_TO_1000;
3049 else if (speed == SPEED_100)
3050 pscr |= SET_MII_SPEED_TO_100;
3051
3052 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
3053
3054 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
3055 if (duplex == DUPLEX_FULL)
3056 pscr |= SET_FULL_DUPLEX_MODE;
3057 }
3058
3059 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
3060 }
3061
3062 static const struct net_device_ops mv643xx_eth_netdev_ops = {
3063 .ndo_open = mv643xx_eth_open,
3064 .ndo_stop = mv643xx_eth_stop,
3065 .ndo_start_xmit = mv643xx_eth_xmit,
3066 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
3067 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
3068 .ndo_validate_addr = eth_validate_addr,
3069 .ndo_do_ioctl = mv643xx_eth_ioctl,
3070 .ndo_change_mtu = mv643xx_eth_change_mtu,
3071 .ndo_set_features = mv643xx_eth_set_features,
3072 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
3073 .ndo_get_stats = mv643xx_eth_get_stats,
3074 #ifdef CONFIG_NET_POLL_CONTROLLER
3075 .ndo_poll_controller = mv643xx_eth_netpoll,
3076 #endif
3077 };
3078
3079 static int mv643xx_eth_probe(struct platform_device *pdev)
3080 {
3081 struct mv643xx_eth_platform_data *pd;
3082 struct mv643xx_eth_private *mp;
3083 struct net_device *dev;
3084 struct phy_device *phydev = NULL;
3085 struct resource *res;
3086 int err;
3087
3088 pd = dev_get_platdata(&pdev->dev);
3089 if (pd == NULL) {
3090 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n");
3091 return -ENODEV;
3092 }
3093
3094 if (pd->shared == NULL) {
3095 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n");
3096 return -ENODEV;
3097 }
3098
3099 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
3100 if (!dev)
3101 return -ENOMEM;
3102
3103 SET_NETDEV_DEV(dev, &pdev->dev);
3104 mp = netdev_priv(dev);
3105 platform_set_drvdata(pdev, mp);
3106
3107 mp->shared = platform_get_drvdata(pd->shared);
3108 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
3109 mp->port_num = pd->port_number;
3110
3111 mp->dev = dev;
3112
3113 /* Kirkwood resets some registers on gated clocks. Especially
3114 * CLK125_BYPASS_EN must be cleared but is not available on
3115 * all other SoCs/System Controllers using this driver.
3116 */
3117 if (of_device_is_compatible(pdev->dev.of_node,
3118 "marvell,kirkwood-eth-port"))
3119 wrlp(mp, PORT_SERIAL_CONTROL1,
3120 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN);
3121
3122 /*
3123 * Start with a default rate, and if there is a clock, allow
3124 * it to override the default.
3125 */
3126 mp->t_clk = 133000000;
3127 mp->clk = devm_clk_get(&pdev->dev, NULL);
3128 if (!IS_ERR(mp->clk)) {
3129 clk_prepare_enable(mp->clk);
3130 mp->t_clk = clk_get_rate(mp->clk);
3131 } else if (!IS_ERR(mp->shared->clk)) {
3132 mp->t_clk = clk_get_rate(mp->shared->clk);
3133 }
3134
3135 set_params(mp, pd);
3136 netif_set_real_num_tx_queues(dev, mp->txq_count);
3137 netif_set_real_num_rx_queues(dev, mp->rxq_count);
3138
3139 err = 0;
3140 if (pd->phy_node) {
3141 phydev = of_phy_connect(mp->dev, pd->phy_node,
3142 mv643xx_eth_adjust_link, 0,
3143 get_phy_mode(mp));
3144 if (!phydev)
3145 err = -ENODEV;
3146 else
3147 phy_addr_set(mp, phydev->mdio.addr);
3148 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) {
3149 phydev = phy_scan(mp, pd->phy_addr);
3150
3151 if (IS_ERR(phydev))
3152 err = PTR_ERR(phydev);
3153 else
3154 phy_init(mp, pd->speed, pd->duplex);
3155 }
3156 if (err == -ENODEV) {
3157 err = -EPROBE_DEFER;
3158 goto out;
3159 }
3160 if (err)
3161 goto out;
3162
3163 dev->ethtool_ops = &mv643xx_eth_ethtool_ops;
3164
3165 init_pscr(mp, pd->speed, pd->duplex);
3166
3167
3168 mib_counters_clear(mp);
3169
3170 timer_setup(&mp->mib_counters_timer, mib_counters_timer_wrapper, 0);
3171 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
3172
3173 spin_lock_init(&mp->mib_counters_lock);
3174
3175 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
3176
3177 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT);
3178
3179 timer_setup(&mp->rx_oom, oom_timer_wrapper, 0);
3180
3181
3182 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
3183 BUG_ON(!res);
3184 dev->irq = res->start;
3185
3186 dev->netdev_ops = &mv643xx_eth_netdev_ops;
3187
3188 dev->watchdog_timeo = 2 * HZ;
3189 dev->base_addr = 0;
3190
3191 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
3192 dev->vlan_features = dev->features;
3193
3194 dev->features |= NETIF_F_RXCSUM;
3195 dev->hw_features = dev->features;
3196
3197 dev->priv_flags |= IFF_UNICAST_FLT;
3198 dev->gso_max_segs = MV643XX_MAX_TSO_SEGS;
3199
3200 /* MTU range: 64 - 9500 */
3201 dev->min_mtu = 64;
3202 dev->max_mtu = 9500;
3203
3204 if (mp->shared->win_protect)
3205 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
3206
3207 netif_carrier_off(dev);
3208
3209 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
3210
3211 set_rx_coal(mp, 250);
3212 set_tx_coal(mp, 0);
3213
3214 err = register_netdev(dev);
3215 if (err)
3216 goto out;
3217
3218 netdev_notice(dev, "port %d with MAC address %pM\n",
3219 mp->port_num, dev->dev_addr);
3220
3221 if (mp->tx_desc_sram_size > 0)
3222 netdev_notice(dev, "configured with sram\n");
3223
3224 return 0;
3225
3226 out:
3227 if (!IS_ERR(mp->clk))
3228 clk_disable_unprepare(mp->clk);
3229 free_netdev(dev);
3230
3231 return err;
3232 }
3233
3234 static int mv643xx_eth_remove(struct platform_device *pdev)
3235 {
3236 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3237 struct net_device *dev = mp->dev;
3238
3239 unregister_netdev(mp->dev);
3240 if (dev->phydev)
3241 phy_disconnect(dev->phydev);
3242 cancel_work_sync(&mp->tx_timeout_task);
3243
3244 if (!IS_ERR(mp->clk))
3245 clk_disable_unprepare(mp->clk);
3246
3247 free_netdev(mp->dev);
3248
3249 return 0;
3250 }
3251
3252 static void mv643xx_eth_shutdown(struct platform_device *pdev)
3253 {
3254 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3255
3256 /* Mask all interrupts on ethernet port */
3257 wrlp(mp, INT_MASK, 0);
3258 rdlp(mp, INT_MASK);
3259
3260 if (netif_running(mp->dev))
3261 port_reset(mp);
3262 }
3263
3264 static struct platform_driver mv643xx_eth_driver = {
3265 .probe = mv643xx_eth_probe,
3266 .remove = mv643xx_eth_remove,
3267 .shutdown = mv643xx_eth_shutdown,
3268 .driver = {
3269 .name = MV643XX_ETH_NAME,
3270 },
3271 };
3272
3273 static struct platform_driver * const drivers[] = {
3274 &mv643xx_eth_shared_driver,
3275 &mv643xx_eth_driver,
3276 };
3277
3278 static int __init mv643xx_eth_init_module(void)
3279 {
3280 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
3281 }
3282 module_init(mv643xx_eth_init_module);
3283
3284 static void __exit mv643xx_eth_cleanup_module(void)
3285 {
3286 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
3287 }
3288 module_exit(mv643xx_eth_cleanup_module);
3289
3290 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3291 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3292 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3293 MODULE_LICENSE("GPL");
3294 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3295 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux with added FPC-III support