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Merge tag 'regmap-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / net / ethernet / marvell / mv643xx_eth.c
blobbf5cc55ba24cbe9aeb44352462dccb254117abed
1 /*
2 * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports
3 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com>
4 *
5 * Based on the 64360 driver from:
6 * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il>
7 * Rabeeh Khoury <rabeeh@marvell.com>
8 *
9 * Copyright (C) 2003 PMC-Sierra, Inc.,
10 * written by Manish Lachwani
11 *
12 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
13 *
14 * Copyright (C) 2004-2006 MontaVista Software, Inc.
15 * Dale Farnsworth <dale@farnsworth.org>
16 *
17 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com>
18 * <sjhill@realitydiluted.com>
19 *
20 * Copyright (C) 2007-2008 Marvell Semiconductor
21 * Lennert Buytenhek <buytenh@marvell.com>
22 *
23 * Copyright (C) 2013 Michael Stapelberg <michael@stapelberg.de>
24 *
25 * This program is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU General Public License
27 * as published by the Free Software Foundation; either version 2
28 * of the License, or (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, see <http://www.gnu.org/licenses/>.
37 */
38
39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41 #include <linux/init.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/in.h>
44 #include <linux/ip.h>
45 #include <net/tso.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/etherdevice.h>
49 #include <linux/delay.h>
50 #include <linux/ethtool.h>
51 #include <linux/platform_device.h>
52 #include <linux/module.h>
53 #include <linux/kernel.h>
54 #include <linux/spinlock.h>
55 #include <linux/workqueue.h>
56 #include <linux/phy.h>
57 #include <linux/mv643xx_eth.h>
58 #include <linux/io.h>
59 #include <linux/interrupt.h>
60 #include <linux/types.h>
61 #include <linux/slab.h>
62 #include <linux/clk.h>
63 #include <linux/of.h>
64 #include <linux/of_irq.h>
65 #include <linux/of_net.h>
66 #include <linux/of_mdio.h>
67
68 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
69 static char mv643xx_eth_driver_version[] = "1.4";
70
71
72 /*
73 * Registers shared between all ports.
74 */
75 #define PHY_ADDR 0x0000
76 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
77 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
78 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
79 #define WINDOW_BAR_ENABLE 0x0290
80 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
81
82 /*
83 * Main per-port registers. These live at offset 0x0400 for
84 * port #0, 0x0800 for port #1, and 0x0c00 for port #2.
85 */
86 #define PORT_CONFIG 0x0000
87 #define UNICAST_PROMISCUOUS_MODE 0x00000001
88 #define PORT_CONFIG_EXT 0x0004
89 #define MAC_ADDR_LOW 0x0014
90 #define MAC_ADDR_HIGH 0x0018
91 #define SDMA_CONFIG 0x001c
92 #define TX_BURST_SIZE_16_64BIT 0x01000000
93 #define TX_BURST_SIZE_4_64BIT 0x00800000
94 #define BLM_TX_NO_SWAP 0x00000020
95 #define BLM_RX_NO_SWAP 0x00000010
96 #define RX_BURST_SIZE_16_64BIT 0x00000008
97 #define RX_BURST_SIZE_4_64BIT 0x00000004
98 #define PORT_SERIAL_CONTROL 0x003c
99 #define SET_MII_SPEED_TO_100 0x01000000
100 #define SET_GMII_SPEED_TO_1000 0x00800000
101 #define SET_FULL_DUPLEX_MODE 0x00200000
102 #define MAX_RX_PACKET_9700BYTE 0x000a0000
103 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000
104 #define DO_NOT_FORCE_LINK_FAIL 0x00000400
105 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200
106 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008
107 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004
108 #define FORCE_LINK_PASS 0x00000002
109 #define SERIAL_PORT_ENABLE 0x00000001
110 #define PORT_STATUS 0x0044
111 #define TX_FIFO_EMPTY 0x00000400
112 #define TX_IN_PROGRESS 0x00000080
113 #define PORT_SPEED_MASK 0x00000030
114 #define PORT_SPEED_1000 0x00000010
115 #define PORT_SPEED_100 0x00000020
116 #define PORT_SPEED_10 0x00000000
117 #define FLOW_CONTROL_ENABLED 0x00000008
118 #define FULL_DUPLEX 0x00000004
119 #define LINK_UP 0x00000002
120 #define TXQ_COMMAND 0x0048
121 #define TXQ_FIX_PRIO_CONF 0x004c
122 #define PORT_SERIAL_CONTROL1 0x004c
123 #define CLK125_BYPASS_EN 0x00000010
124 #define TX_BW_RATE 0x0050
125 #define TX_BW_MTU 0x0058
126 #define TX_BW_BURST 0x005c
127 #define INT_CAUSE 0x0060
128 #define INT_TX_END 0x07f80000
129 #define INT_TX_END_0 0x00080000
130 #define INT_RX 0x000003fc
131 #define INT_RX_0 0x00000004
132 #define INT_EXT 0x00000002
133 #define INT_CAUSE_EXT 0x0064
134 #define INT_EXT_LINK_PHY 0x00110000
135 #define INT_EXT_TX 0x000000ff
136 #define INT_MASK 0x0068
137 #define INT_MASK_EXT 0x006c
138 #define TX_FIFO_URGENT_THRESHOLD 0x0074
139 #define RX_DISCARD_FRAME_CNT 0x0084
140 #define RX_OVERRUN_FRAME_CNT 0x0088
141 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
142 #define TX_BW_RATE_MOVED 0x00e0
143 #define TX_BW_MTU_MOVED 0x00e8
144 #define TX_BW_BURST_MOVED 0x00ec
145 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
146 #define RXQ_COMMAND 0x0280
147 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
148 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
149 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
150 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
151
152 /*
153 * Misc per-port registers.
154 */
155 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
156 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
157 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
158 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
159
160
161 /*
162 * SDMA configuration register default value.
163 */
164 #if defined(__BIG_ENDIAN)
165 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
166 (RX_BURST_SIZE_4_64BIT | \
167 TX_BURST_SIZE_4_64BIT)
168 #elif defined(__LITTLE_ENDIAN)
169 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
170 (RX_BURST_SIZE_4_64BIT | \
171 BLM_RX_NO_SWAP | \
172 BLM_TX_NO_SWAP | \
173 TX_BURST_SIZE_4_64BIT)
174 #else
175 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
176 #endif
177
178
179 /*
180 * Misc definitions.
181 */
182 #define DEFAULT_RX_QUEUE_SIZE 128
183 #define DEFAULT_TX_QUEUE_SIZE 512
184 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
185
186 #define TSO_HEADER_SIZE 128
187
188 /* Max number of allowed TCP segments for software TSO */
189 #define MV643XX_MAX_TSO_SEGS 100
190 #define MV643XX_MAX_SKB_DESCS (MV643XX_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS)
191
192 #define IS_TSO_HEADER(txq, addr) \
193 ((addr >= txq->tso_hdrs_dma) && \
194 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE))
195
196 #define DESC_DMA_MAP_SINGLE 0
197 #define DESC_DMA_MAP_PAGE 1
198
199 /*
200 * RX/TX descriptors.
201 */
202 #if defined(__BIG_ENDIAN)
203 struct rx_desc {
204 u16 byte_cnt; /* Descriptor buffer byte count */
205 u16 buf_size; /* Buffer size */
206 u32 cmd_sts; /* Descriptor command status */
207 u32 next_desc_ptr; /* Next descriptor pointer */
208 u32 buf_ptr; /* Descriptor buffer pointer */
209 };
210
211 struct tx_desc {
212 u16 byte_cnt; /* buffer byte count */
213 u16 l4i_chk; /* CPU provided TCP checksum */
214 u32 cmd_sts; /* Command/status field */
215 u32 next_desc_ptr; /* Pointer to next descriptor */
216 u32 buf_ptr; /* pointer to buffer for this descriptor*/
217 };
218 #elif defined(__LITTLE_ENDIAN)
219 struct rx_desc {
220 u32 cmd_sts; /* Descriptor command status */
221 u16 buf_size; /* Buffer size */
222 u16 byte_cnt; /* Descriptor buffer byte count */
223 u32 buf_ptr; /* Descriptor buffer pointer */
224 u32 next_desc_ptr; /* Next descriptor pointer */
225 };
226
227 struct tx_desc {
228 u32 cmd_sts; /* Command/status field */
229 u16 l4i_chk; /* CPU provided TCP checksum */
230 u16 byte_cnt; /* buffer byte count */
231 u32 buf_ptr; /* pointer to buffer for this descriptor*/
232 u32 next_desc_ptr; /* Pointer to next descriptor */
233 };
234 #else
235 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
236 #endif
237
238 /* RX & TX descriptor command */
239 #define BUFFER_OWNED_BY_DMA 0x80000000
240
241 /* RX & TX descriptor status */
242 #define ERROR_SUMMARY 0x00000001
243
244 /* RX descriptor status */
245 #define LAYER_4_CHECKSUM_OK 0x40000000
246 #define RX_ENABLE_INTERRUPT 0x20000000
247 #define RX_FIRST_DESC 0x08000000
248 #define RX_LAST_DESC 0x04000000
249 #define RX_IP_HDR_OK 0x02000000
250 #define RX_PKT_IS_IPV4 0x01000000
251 #define RX_PKT_IS_ETHERNETV2 0x00800000
252 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
253 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
254 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
255
256 /* TX descriptor command */
257 #define TX_ENABLE_INTERRUPT 0x00800000
258 #define GEN_CRC 0x00400000
259 #define TX_FIRST_DESC 0x00200000
260 #define TX_LAST_DESC 0x00100000
261 #define ZERO_PADDING 0x00080000
262 #define GEN_IP_V4_CHECKSUM 0x00040000
263 #define GEN_TCP_UDP_CHECKSUM 0x00020000
264 #define UDP_FRAME 0x00010000
265 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
266 #define GEN_TCP_UDP_CHK_FULL 0x00000400
267 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
268
269 #define TX_IHL_SHIFT 11
270
271
272 /* global *******************************************************************/
273 struct mv643xx_eth_shared_private {
274 /*
275 * Ethernet controller base address.
276 */
277 void __iomem *base;
278
279 /*
280 * Per-port MBUS window access register value.
281 */
282 u32 win_protect;
283
284 /*
285 * Hardware-specific parameters.
286 */
287 int extended_rx_coal_limit;
288 int tx_bw_control;
289 int tx_csum_limit;
290 struct clk *clk;
291 };
292
293 #define TX_BW_CONTROL_ABSENT 0
294 #define TX_BW_CONTROL_OLD_LAYOUT 1
295 #define TX_BW_CONTROL_NEW_LAYOUT 2
296
297 static int mv643xx_eth_open(struct net_device *dev);
298 static int mv643xx_eth_stop(struct net_device *dev);
299
300
301 /* per-port *****************************************************************/
302 struct mib_counters {
303 u64 good_octets_received;
304 u32 bad_octets_received;
305 u32 internal_mac_transmit_err;
306 u32 good_frames_received;
307 u32 bad_frames_received;
308 u32 broadcast_frames_received;
309 u32 multicast_frames_received;
310 u32 frames_64_octets;
311 u32 frames_65_to_127_octets;
312 u32 frames_128_to_255_octets;
313 u32 frames_256_to_511_octets;
314 u32 frames_512_to_1023_octets;
315 u32 frames_1024_to_max_octets;
316 u64 good_octets_sent;
317 u32 good_frames_sent;
318 u32 excessive_collision;
319 u32 multicast_frames_sent;
320 u32 broadcast_frames_sent;
321 u32 unrec_mac_control_received;
322 u32 fc_sent;
323 u32 good_fc_received;
324 u32 bad_fc_received;
325 u32 undersize_received;
326 u32 fragments_received;
327 u32 oversize_received;
328 u32 jabber_received;
329 u32 mac_receive_error;
330 u32 bad_crc_event;
331 u32 collision;
332 u32 late_collision;
333 /* Non MIB hardware counters */
334 u32 rx_discard;
335 u32 rx_overrun;
336 };
337
338 struct rx_queue {
339 int index;
340
341 int rx_ring_size;
342
343 int rx_desc_count;
344 int rx_curr_desc;
345 int rx_used_desc;
346
347 struct rx_desc *rx_desc_area;
348 dma_addr_t rx_desc_dma;
349 int rx_desc_area_size;
350 struct sk_buff **rx_skb;
351 };
352
353 struct tx_queue {
354 int index;
355
356 int tx_ring_size;
357
358 int tx_desc_count;
359 int tx_curr_desc;
360 int tx_used_desc;
361
362 int tx_stop_threshold;
363 int tx_wake_threshold;
364
365 char *tso_hdrs;
366 dma_addr_t tso_hdrs_dma;
367
368 struct tx_desc *tx_desc_area;
369 char *tx_desc_mapping; /* array to track the type of the dma mapping */
370 dma_addr_t tx_desc_dma;
371 int tx_desc_area_size;
372
373 struct sk_buff_head tx_skb;
374
375 unsigned long tx_packets;
376 unsigned long tx_bytes;
377 unsigned long tx_dropped;
378 };
379
380 struct mv643xx_eth_private {
381 struct mv643xx_eth_shared_private *shared;
382 void __iomem *base;
383 int port_num;
384
385 struct net_device *dev;
386
387 struct phy_device *phy;
388
389 struct timer_list mib_counters_timer;
390 spinlock_t mib_counters_lock;
391 struct mib_counters mib_counters;
392
393 struct work_struct tx_timeout_task;
394
395 struct napi_struct napi;
396 u32 int_mask;
397 u8 oom;
398 u8 work_link;
399 u8 work_tx;
400 u8 work_tx_end;
401 u8 work_rx;
402 u8 work_rx_refill;
403
404 int skb_size;
405
406 /*
407 * RX state.
408 */
409 int rx_ring_size;
410 unsigned long rx_desc_sram_addr;
411 int rx_desc_sram_size;
412 int rxq_count;
413 struct timer_list rx_oom;
414 struct rx_queue rxq[8];
415
416 /*
417 * TX state.
418 */
419 int tx_ring_size;
420 unsigned long tx_desc_sram_addr;
421 int tx_desc_sram_size;
422 int txq_count;
423 struct tx_queue txq[8];
424
425 /*
426 * Hardware-specific parameters.
427 */
428 struct clk *clk;
429 unsigned int t_clk;
430 };
431
432
433 /* port register accessors **************************************************/
434 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
435 {
436 return readl(mp->shared->base + offset);
437 }
438
439 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
440 {
441 return readl(mp->base + offset);
442 }
443
444 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
445 {
446 writel(data, mp->shared->base + offset);
447 }
448
449 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
450 {
451 writel(data, mp->base + offset);
452 }
453
454
455 /* rxq/txq helper functions *************************************************/
456 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
457 {
458 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
459 }
460
461 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
462 {
463 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
464 }
465
466 static void rxq_enable(struct rx_queue *rxq)
467 {
468 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
469 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
470 }
471
472 static void rxq_disable(struct rx_queue *rxq)
473 {
474 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
475 u8 mask = 1 << rxq->index;
476
477 wrlp(mp, RXQ_COMMAND, mask << 8);
478 while (rdlp(mp, RXQ_COMMAND) & mask)
479 udelay(10);
480 }
481
482 static void txq_reset_hw_ptr(struct tx_queue *txq)
483 {
484 struct mv643xx_eth_private *mp = txq_to_mp(txq);
485 u32 addr;
486
487 addr = (u32)txq->tx_desc_dma;
488 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
489 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
490 }
491
492 static void txq_enable(struct tx_queue *txq)
493 {
494 struct mv643xx_eth_private *mp = txq_to_mp(txq);
495 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
496 }
497
498 static void txq_disable(struct tx_queue *txq)
499 {
500 struct mv643xx_eth_private *mp = txq_to_mp(txq);
501 u8 mask = 1 << txq->index;
502
503 wrlp(mp, TXQ_COMMAND, mask << 8);
504 while (rdlp(mp, TXQ_COMMAND) & mask)
505 udelay(10);
506 }
507
508 static void txq_maybe_wake(struct tx_queue *txq)
509 {
510 struct mv643xx_eth_private *mp = txq_to_mp(txq);
511 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
512
513 if (netif_tx_queue_stopped(nq)) {
514 __netif_tx_lock(nq, smp_processor_id());
515 if (txq->tx_desc_count <= txq->tx_wake_threshold)
516 netif_tx_wake_queue(nq);
517 __netif_tx_unlock(nq);
518 }
519 }
520
521 static int rxq_process(struct rx_queue *rxq, int budget)
522 {
523 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
524 struct net_device_stats *stats = &mp->dev->stats;
525 int rx;
526
527 rx = 0;
528 while (rx < budget && rxq->rx_desc_count) {
529 struct rx_desc *rx_desc;
530 unsigned int cmd_sts;
531 struct sk_buff *skb;
532 u16 byte_cnt;
533
534 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
535
536 cmd_sts = rx_desc->cmd_sts;
537 if (cmd_sts & BUFFER_OWNED_BY_DMA)
538 break;
539 rmb();
540
541 skb = rxq->rx_skb[rxq->rx_curr_desc];
542 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
543
544 rxq->rx_curr_desc++;
545 if (rxq->rx_curr_desc == rxq->rx_ring_size)
546 rxq->rx_curr_desc = 0;
547
548 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
549 rx_desc->buf_size, DMA_FROM_DEVICE);
550 rxq->rx_desc_count--;
551 rx++;
552
553 mp->work_rx_refill |= 1 << rxq->index;
554
555 byte_cnt = rx_desc->byte_cnt;
556
557 /*
558 * Update statistics.
559 *
560 * Note that the descriptor byte count includes 2 dummy
561 * bytes automatically inserted by the hardware at the
562 * start of the packet (which we don't count), and a 4
563 * byte CRC at the end of the packet (which we do count).
564 */
565 stats->rx_packets++;
566 stats->rx_bytes += byte_cnt - 2;
567
568 /*
569 * In case we received a packet without first / last bits
570 * on, or the error summary bit is set, the packet needs
571 * to be dropped.
572 */
573 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
574 != (RX_FIRST_DESC | RX_LAST_DESC))
575 goto err;
576
577 /*
578 * The -4 is for the CRC in the trailer of the
579 * received packet
580 */
581 skb_put(skb, byte_cnt - 2 - 4);
582
583 if (cmd_sts & LAYER_4_CHECKSUM_OK)
584 skb->ip_summed = CHECKSUM_UNNECESSARY;
585 skb->protocol = eth_type_trans(skb, mp->dev);
586
587 napi_gro_receive(&mp->napi, skb);
588
589 continue;
590
591 err:
592 stats->rx_dropped++;
593
594 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
595 (RX_FIRST_DESC | RX_LAST_DESC)) {
596 if (net_ratelimit())
597 netdev_err(mp->dev,
598 "received packet spanning multiple descriptors\n");
599 }
600
601 if (cmd_sts & ERROR_SUMMARY)
602 stats->rx_errors++;
603
604 dev_kfree_skb(skb);
605 }
606
607 if (rx < budget)
608 mp->work_rx &= ~(1 << rxq->index);
609
610 return rx;
611 }
612
613 static int rxq_refill(struct rx_queue *rxq, int budget)
614 {
615 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
616 int refilled;
617
618 refilled = 0;
619 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
620 struct sk_buff *skb;
621 int rx;
622 struct rx_desc *rx_desc;
623 int size;
624
625 skb = netdev_alloc_skb(mp->dev, mp->skb_size);
626
627 if (skb == NULL) {
628 mp->oom = 1;
629 goto oom;
630 }
631
632 if (SKB_DMA_REALIGN)
633 skb_reserve(skb, SKB_DMA_REALIGN);
634
635 refilled++;
636 rxq->rx_desc_count++;
637
638 rx = rxq->rx_used_desc++;
639 if (rxq->rx_used_desc == rxq->rx_ring_size)
640 rxq->rx_used_desc = 0;
641
642 rx_desc = rxq->rx_desc_area + rx;
643
644 size = skb_end_pointer(skb) - skb->data;
645 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent,
646 skb->data, size,
647 DMA_FROM_DEVICE);
648 rx_desc->buf_size = size;
649 rxq->rx_skb[rx] = skb;
650 wmb();
651 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
652 wmb();
653
654 /*
655 * The hardware automatically prepends 2 bytes of
656 * dummy data to each received packet, so that the
657 * IP header ends up 16-byte aligned.
658 */
659 skb_reserve(skb, 2);
660 }
661
662 if (refilled < budget)
663 mp->work_rx_refill &= ~(1 << rxq->index);
664
665 oom:
666 return refilled;
667 }
668
669
670 /* tx ***********************************************************************/
671 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
672 {
673 int frag;
674
675 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
676 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
677
678 if (skb_frag_size(fragp) <= 8 && fragp->page_offset & 7)
679 return 1;
680 }
681
682 return 0;
683 }
684
685 static inline __be16 sum16_as_be(__sum16 sum)
686 {
687 return (__force __be16)sum;
688 }
689
690 static int skb_tx_csum(struct mv643xx_eth_private *mp, struct sk_buff *skb,
691 u16 *l4i_chk, u32 *command, int length)
692 {
693 int ret;
694 u32 cmd = 0;
695
696 if (skb->ip_summed == CHECKSUM_PARTIAL) {
697 int hdr_len;
698 int tag_bytes;
699
700 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
701 skb->protocol != htons(ETH_P_8021Q));
702
703 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
704 tag_bytes = hdr_len - ETH_HLEN;
705
706 if (length - hdr_len > mp->shared->tx_csum_limit ||
707 unlikely(tag_bytes & ~12)) {
708 ret = skb_checksum_help(skb);
709 if (!ret)
710 goto no_csum;
711 return ret;
712 }
713
714 if (tag_bytes & 4)
715 cmd |= MAC_HDR_EXTRA_4_BYTES;
716 if (tag_bytes & 8)
717 cmd |= MAC_HDR_EXTRA_8_BYTES;
718
719 cmd |= GEN_TCP_UDP_CHECKSUM | GEN_TCP_UDP_CHK_FULL |
720 GEN_IP_V4_CHECKSUM |
721 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
722
723 /* TODO: Revisit this. With the usage of GEN_TCP_UDP_CHK_FULL
724 * it seems we don't need to pass the initial checksum. */
725 switch (ip_hdr(skb)->protocol) {
726 case IPPROTO_UDP:
727 cmd |= UDP_FRAME;
728 *l4i_chk = 0;
729 break;
730 case IPPROTO_TCP:
731 *l4i_chk = 0;
732 break;
733 default:
734 WARN(1, "protocol not supported");
735 }
736 } else {
737 no_csum:
738 /* Errata BTS #50, IHL must be 5 if no HW checksum */
739 cmd |= 5 << TX_IHL_SHIFT;
740 }
741 *command = cmd;
742 return 0;
743 }
744
745 static inline int
746 txq_put_data_tso(struct net_device *dev, struct tx_queue *txq,
747 struct sk_buff *skb, char *data, int length,
748 bool last_tcp, bool is_last)
749 {
750 int tx_index;
751 u32 cmd_sts;
752 struct tx_desc *desc;
753
754 tx_index = txq->tx_curr_desc++;
755 if (txq->tx_curr_desc == txq->tx_ring_size)
756 txq->tx_curr_desc = 0;
757 desc = &txq->tx_desc_area[tx_index];
758 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE;
759
760 desc->l4i_chk = 0;
761 desc->byte_cnt = length;
762
763 if (length <= 8 && (uintptr_t)data & 0x7) {
764 /* Copy unaligned small data fragment to TSO header data area */
765 memcpy(txq->tso_hdrs + tx_index * TSO_HEADER_SIZE,
766 data, length);
767 desc->buf_ptr = txq->tso_hdrs_dma
768 + tx_index * TSO_HEADER_SIZE;
769 } else {
770 /* Alignment is okay, map buffer and hand off to hardware */
771 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE;
772 desc->buf_ptr = dma_map_single(dev->dev.parent, data,
773 length, DMA_TO_DEVICE);
774 if (unlikely(dma_mapping_error(dev->dev.parent,
775 desc->buf_ptr))) {
776 WARN(1, "dma_map_single failed!\n");
777 return -ENOMEM;
778 }
779 }
780
781 cmd_sts = BUFFER_OWNED_BY_DMA;
782 if (last_tcp) {
783 /* last descriptor in the TCP packet */
784 cmd_sts |= ZERO_PADDING | TX_LAST_DESC;
785 /* last descriptor in SKB */
786 if (is_last)
787 cmd_sts |= TX_ENABLE_INTERRUPT;
788 }
789 desc->cmd_sts = cmd_sts;
790 return 0;
791 }
792
793 static inline void
794 txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length,
795 u32 *first_cmd_sts, bool first_desc)
796 {
797 struct mv643xx_eth_private *mp = txq_to_mp(txq);
798 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
799 int tx_index;
800 struct tx_desc *desc;
801 int ret;
802 u32 cmd_csum = 0;
803 u16 l4i_chk = 0;
804 u32 cmd_sts;
805
806 tx_index = txq->tx_curr_desc;
807 desc = &txq->tx_desc_area[tx_index];
808
809 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_csum, length);
810 if (ret)
811 WARN(1, "failed to prepare checksum!");
812
813 /* Should we set this? Can't use the value from skb_tx_csum()
814 * as it's not the correct initial L4 checksum to use. */
815 desc->l4i_chk = 0;
816
817 desc->byte_cnt = hdr_len;
818 desc->buf_ptr = txq->tso_hdrs_dma +
819 txq->tx_curr_desc * TSO_HEADER_SIZE;
820 cmd_sts = cmd_csum | BUFFER_OWNED_BY_DMA | TX_FIRST_DESC |
821 GEN_CRC;
822
823 /* Defer updating the first command descriptor until all
824 * following descriptors have been written.
825 */
826 if (first_desc)
827 *first_cmd_sts = cmd_sts;
828 else
829 desc->cmd_sts = cmd_sts;
830
831 txq->tx_curr_desc++;
832 if (txq->tx_curr_desc == txq->tx_ring_size)
833 txq->tx_curr_desc = 0;
834 }
835
836 static int txq_submit_tso(struct tx_queue *txq, struct sk_buff *skb,
837 struct net_device *dev)
838 {
839 struct mv643xx_eth_private *mp = txq_to_mp(txq);
840 int total_len, data_left, ret;
841 int desc_count = 0;
842 struct tso_t tso;
843 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
844 struct tx_desc *first_tx_desc;
845 u32 first_cmd_sts = 0;
846
847 /* Count needed descriptors */
848 if ((txq->tx_desc_count + tso_count_descs(skb)) >= txq->tx_ring_size) {
849 netdev_dbg(dev, "not enough descriptors for TSO!\n");
850 return -EBUSY;
851 }
852
853 first_tx_desc = &txq->tx_desc_area[txq->tx_curr_desc];
854
855 /* Initialize the TSO handler, and prepare the first payload */
856 tso_start(skb, &tso);
857
858 total_len = skb->len - hdr_len;
859 while (total_len > 0) {
860 bool first_desc = (desc_count == 0);
861 char *hdr;
862
863 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len);
864 total_len -= data_left;
865 desc_count++;
866
867 /* prepare packet headers: MAC + IP + TCP */
868 hdr = txq->tso_hdrs + txq->tx_curr_desc * TSO_HEADER_SIZE;
869 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0);
870 txq_put_hdr_tso(skb, txq, data_left, &first_cmd_sts,
871 first_desc);
872
873 while (data_left > 0) {
874 int size;
875 desc_count++;
876
877 size = min_t(int, tso.size, data_left);
878 ret = txq_put_data_tso(dev, txq, skb, tso.data, size,
879 size == data_left,
880 total_len == 0);
881 if (ret)
882 goto err_release;
883 data_left -= size;
884 tso_build_data(skb, &tso, size);
885 }
886 }
887
888 __skb_queue_tail(&txq->tx_skb, skb);
889 skb_tx_timestamp(skb);
890
891 /* ensure all other descriptors are written before first cmd_sts */
892 wmb();
893 first_tx_desc->cmd_sts = first_cmd_sts;
894
895 /* clear TX_END status */
896 mp->work_tx_end &= ~(1 << txq->index);
897
898 /* ensure all descriptors are written before poking hardware */
899 wmb();
900 txq_enable(txq);
901 txq->tx_desc_count += desc_count;
902 return 0;
903 err_release:
904 /* TODO: Release all used data descriptors; header descriptors must not
905 * be DMA-unmapped.
906 */
907 return ret;
908 }
909
910 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
911 {
912 struct mv643xx_eth_private *mp = txq_to_mp(txq);
913 int nr_frags = skb_shinfo(skb)->nr_frags;
914 int frag;
915
916 for (frag = 0; frag < nr_frags; frag++) {
917 skb_frag_t *this_frag;
918 int tx_index;
919 struct tx_desc *desc;
920
921 this_frag = &skb_shinfo(skb)->frags[frag];
922 tx_index = txq->tx_curr_desc++;
923 if (txq->tx_curr_desc == txq->tx_ring_size)
924 txq->tx_curr_desc = 0;
925 desc = &txq->tx_desc_area[tx_index];
926 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_PAGE;
927
928 /*
929 * The last fragment will generate an interrupt
930 * which will free the skb on TX completion.
931 */
932 if (frag == nr_frags - 1) {
933 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
934 ZERO_PADDING | TX_LAST_DESC |
935 TX_ENABLE_INTERRUPT;
936 } else {
937 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
938 }
939
940 desc->l4i_chk = 0;
941 desc->byte_cnt = skb_frag_size(this_frag);
942 desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent,
943 this_frag, 0, desc->byte_cnt,
944 DMA_TO_DEVICE);
945 }
946 }
947
948 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb,
949 struct net_device *dev)
950 {
951 struct mv643xx_eth_private *mp = txq_to_mp(txq);
952 int nr_frags = skb_shinfo(skb)->nr_frags;
953 int tx_index;
954 struct tx_desc *desc;
955 u32 cmd_sts;
956 u16 l4i_chk;
957 int length, ret;
958
959 cmd_sts = 0;
960 l4i_chk = 0;
961
962 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
963 if (net_ratelimit())
964 netdev_err(dev, "tx queue full?!\n");
965 return -EBUSY;
966 }
967
968 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_sts, skb->len);
969 if (ret)
970 return ret;
971 cmd_sts |= TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
972
973 tx_index = txq->tx_curr_desc++;
974 if (txq->tx_curr_desc == txq->tx_ring_size)
975 txq->tx_curr_desc = 0;
976 desc = &txq->tx_desc_area[tx_index];
977 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE;
978
979 if (nr_frags) {
980 txq_submit_frag_skb(txq, skb);
981 length = skb_headlen(skb);
982 } else {
983 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
984 length = skb->len;
985 }
986
987 desc->l4i_chk = l4i_chk;
988 desc->byte_cnt = length;
989 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
990 length, DMA_TO_DEVICE);
991
992 __skb_queue_tail(&txq->tx_skb, skb);
993
994 skb_tx_timestamp(skb);
995
996 /* ensure all other descriptors are written before first cmd_sts */
997 wmb();
998 desc->cmd_sts = cmd_sts;
999
1000 /* clear TX_END status */
1001 mp->work_tx_end &= ~(1 << txq->index);
1002
1003 /* ensure all descriptors are written before poking hardware */
1004 wmb();
1005 txq_enable(txq);
1006
1007 txq->tx_desc_count += nr_frags + 1;
1008
1009 return 0;
1010 }
1011
1012 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
1013 {
1014 struct mv643xx_eth_private *mp = netdev_priv(dev);
1015 int length, queue, ret;
1016 struct tx_queue *txq;
1017 struct netdev_queue *nq;
1018
1019 queue = skb_get_queue_mapping(skb);
1020 txq = mp->txq + queue;
1021 nq = netdev_get_tx_queue(dev, queue);
1022
1023 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
1024 netdev_printk(KERN_DEBUG, dev,
1025 "failed to linearize skb with tiny unaligned fragment\n");
1026 return NETDEV_TX_BUSY;
1027 }
1028
1029 length = skb->len;
1030
1031 if (skb_is_gso(skb))
1032 ret = txq_submit_tso(txq, skb, dev);
1033 else
1034 ret = txq_submit_skb(txq, skb, dev);
1035 if (!ret) {
1036 txq->tx_bytes += length;
1037 txq->tx_packets++;
1038
1039 if (txq->tx_desc_count >= txq->tx_stop_threshold)
1040 netif_tx_stop_queue(nq);
1041 } else {
1042 txq->tx_dropped++;
1043 dev_kfree_skb_any(skb);
1044 }
1045
1046 return NETDEV_TX_OK;
1047 }
1048
1049
1050 /* tx napi ******************************************************************/
1051 static void txq_kick(struct tx_queue *txq)
1052 {
1053 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1054 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
1055 u32 hw_desc_ptr;
1056 u32 expected_ptr;
1057
1058 __netif_tx_lock(nq, smp_processor_id());
1059
1060 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
1061 goto out;
1062
1063 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
1064 expected_ptr = (u32)txq->tx_desc_dma +
1065 txq->tx_curr_desc * sizeof(struct tx_desc);
1066
1067 if (hw_desc_ptr != expected_ptr)
1068 txq_enable(txq);
1069
1070 out:
1071 __netif_tx_unlock(nq);
1072
1073 mp->work_tx_end &= ~(1 << txq->index);
1074 }
1075
1076 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
1077 {
1078 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1079 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
1080 int reclaimed;
1081
1082 __netif_tx_lock_bh(nq);
1083
1084 reclaimed = 0;
1085 while (reclaimed < budget && txq->tx_desc_count > 0) {
1086 int tx_index;
1087 struct tx_desc *desc;
1088 u32 cmd_sts;
1089 char desc_dma_map;
1090
1091 tx_index = txq->tx_used_desc;
1092 desc = &txq->tx_desc_area[tx_index];
1093 desc_dma_map = txq->tx_desc_mapping[tx_index];
1094
1095 cmd_sts = desc->cmd_sts;
1096
1097 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
1098 if (!force)
1099 break;
1100 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
1101 }
1102
1103 txq->tx_used_desc = tx_index + 1;
1104 if (txq->tx_used_desc == txq->tx_ring_size)
1105 txq->tx_used_desc = 0;
1106
1107 reclaimed++;
1108 txq->tx_desc_count--;
1109
1110 if (!IS_TSO_HEADER(txq, desc->buf_ptr)) {
1111
1112 if (desc_dma_map == DESC_DMA_MAP_PAGE)
1113 dma_unmap_page(mp->dev->dev.parent,
1114 desc->buf_ptr,
1115 desc->byte_cnt,
1116 DMA_TO_DEVICE);
1117 else
1118 dma_unmap_single(mp->dev->dev.parent,
1119 desc->buf_ptr,
1120 desc->byte_cnt,
1121 DMA_TO_DEVICE);
1122 }
1123
1124 if (cmd_sts & TX_ENABLE_INTERRUPT) {
1125 struct sk_buff *skb = __skb_dequeue(&txq->tx_skb);
1126
1127 if (!WARN_ON(!skb))
1128 dev_kfree_skb(skb);
1129 }
1130
1131 if (cmd_sts & ERROR_SUMMARY) {
1132 netdev_info(mp->dev, "tx error\n");
1133 mp->dev->stats.tx_errors++;
1134 }
1135
1136 }
1137
1138 __netif_tx_unlock_bh(nq);
1139
1140 if (reclaimed < budget)
1141 mp->work_tx &= ~(1 << txq->index);
1142
1143 return reclaimed;
1144 }
1145
1146
1147 /* tx rate control **********************************************************/
1148 /*
1149 * Set total maximum TX rate (shared by all TX queues for this port)
1150 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
1151 */
1152 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
1153 {
1154 int token_rate;
1155 int mtu;
1156 int bucket_size;
1157
1158 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000);
1159 if (token_rate > 1023)
1160 token_rate = 1023;
1161
1162 mtu = (mp->dev->mtu + 255) >> 8;
1163 if (mtu > 63)
1164 mtu = 63;
1165
1166 bucket_size = (burst + 255) >> 8;
1167 if (bucket_size > 65535)
1168 bucket_size = 65535;
1169
1170 switch (mp->shared->tx_bw_control) {
1171 case TX_BW_CONTROL_OLD_LAYOUT:
1172 wrlp(mp, TX_BW_RATE, token_rate);
1173 wrlp(mp, TX_BW_MTU, mtu);
1174 wrlp(mp, TX_BW_BURST, bucket_size);
1175 break;
1176 case TX_BW_CONTROL_NEW_LAYOUT:
1177 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1178 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1179 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1180 break;
1181 }
1182 }
1183
1184 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1185 {
1186 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1187 int token_rate;
1188 int bucket_size;
1189
1190 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000);
1191 if (token_rate > 1023)
1192 token_rate = 1023;
1193
1194 bucket_size = (burst + 255) >> 8;
1195 if (bucket_size > 65535)
1196 bucket_size = 65535;
1197
1198 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1199 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1200 }
1201
1202 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1203 {
1204 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1205 int off;
1206 u32 val;
1207
1208 /*
1209 * Turn on fixed priority mode.
1210 */
1211 off = 0;
1212 switch (mp->shared->tx_bw_control) {
1213 case TX_BW_CONTROL_OLD_LAYOUT:
1214 off = TXQ_FIX_PRIO_CONF;
1215 break;
1216 case TX_BW_CONTROL_NEW_LAYOUT:
1217 off = TXQ_FIX_PRIO_CONF_MOVED;
1218 break;
1219 }
1220
1221 if (off) {
1222 val = rdlp(mp, off);
1223 val |= 1 << txq->index;
1224 wrlp(mp, off, val);
1225 }
1226 }
1227
1228
1229 /* mii management interface *************************************************/
1230 static void mv643xx_eth_adjust_link(struct net_device *dev)
1231 {
1232 struct mv643xx_eth_private *mp = netdev_priv(dev);
1233 u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
1234 u32 autoneg_disable = FORCE_LINK_PASS |
1235 DISABLE_AUTO_NEG_SPEED_GMII |
1236 DISABLE_AUTO_NEG_FOR_FLOW_CTRL |
1237 DISABLE_AUTO_NEG_FOR_DUPLEX;
1238
1239 if (mp->phy->autoneg == AUTONEG_ENABLE) {
1240 /* enable auto negotiation */
1241 pscr &= ~autoneg_disable;
1242 goto out_write;
1243 }
1244
1245 pscr |= autoneg_disable;
1246
1247 if (mp->phy->speed == SPEED_1000) {
1248 /* force gigabit, half duplex not supported */
1249 pscr |= SET_GMII_SPEED_TO_1000;
1250 pscr |= SET_FULL_DUPLEX_MODE;
1251 goto out_write;
1252 }
1253
1254 pscr &= ~SET_GMII_SPEED_TO_1000;
1255
1256 if (mp->phy->speed == SPEED_100)
1257 pscr |= SET_MII_SPEED_TO_100;
1258 else
1259 pscr &= ~SET_MII_SPEED_TO_100;
1260
1261 if (mp->phy->duplex == DUPLEX_FULL)
1262 pscr |= SET_FULL_DUPLEX_MODE;
1263 else
1264 pscr &= ~SET_FULL_DUPLEX_MODE;
1265
1266 out_write:
1267 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
1268 }
1269
1270 /* statistics ***************************************************************/
1271 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1272 {
1273 struct mv643xx_eth_private *mp = netdev_priv(dev);
1274 struct net_device_stats *stats = &dev->stats;
1275 unsigned long tx_packets = 0;
1276 unsigned long tx_bytes = 0;
1277 unsigned long tx_dropped = 0;
1278 int i;
1279
1280 for (i = 0; i < mp->txq_count; i++) {
1281 struct tx_queue *txq = mp->txq + i;
1282
1283 tx_packets += txq->tx_packets;
1284 tx_bytes += txq->tx_bytes;
1285 tx_dropped += txq->tx_dropped;
1286 }
1287
1288 stats->tx_packets = tx_packets;
1289 stats->tx_bytes = tx_bytes;
1290 stats->tx_dropped = tx_dropped;
1291
1292 return stats;
1293 }
1294
1295 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1296 {
1297 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1298 }
1299
1300 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1301 {
1302 int i;
1303
1304 for (i = 0; i < 0x80; i += 4)
1305 mib_read(mp, i);
1306
1307 /* Clear non MIB hw counters also */
1308 rdlp(mp, RX_DISCARD_FRAME_CNT);
1309 rdlp(mp, RX_OVERRUN_FRAME_CNT);
1310 }
1311
1312 static void mib_counters_update(struct mv643xx_eth_private *mp)
1313 {
1314 struct mib_counters *p = &mp->mib_counters;
1315
1316 spin_lock_bh(&mp->mib_counters_lock);
1317 p->good_octets_received += mib_read(mp, 0x00);
1318 p->bad_octets_received += mib_read(mp, 0x08);
1319 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1320 p->good_frames_received += mib_read(mp, 0x10);
1321 p->bad_frames_received += mib_read(mp, 0x14);
1322 p->broadcast_frames_received += mib_read(mp, 0x18);
1323 p->multicast_frames_received += mib_read(mp, 0x1c);
1324 p->frames_64_octets += mib_read(mp, 0x20);
1325 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1326 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1327 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1328 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1329 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1330 p->good_octets_sent += mib_read(mp, 0x38);
1331 p->good_frames_sent += mib_read(mp, 0x40);
1332 p->excessive_collision += mib_read(mp, 0x44);
1333 p->multicast_frames_sent += mib_read(mp, 0x48);
1334 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1335 p->unrec_mac_control_received += mib_read(mp, 0x50);
1336 p->fc_sent += mib_read(mp, 0x54);
1337 p->good_fc_received += mib_read(mp, 0x58);
1338 p->bad_fc_received += mib_read(mp, 0x5c);
1339 p->undersize_received += mib_read(mp, 0x60);
1340 p->fragments_received += mib_read(mp, 0x64);
1341 p->oversize_received += mib_read(mp, 0x68);
1342 p->jabber_received += mib_read(mp, 0x6c);
1343 p->mac_receive_error += mib_read(mp, 0x70);
1344 p->bad_crc_event += mib_read(mp, 0x74);
1345 p->collision += mib_read(mp, 0x78);
1346 p->late_collision += mib_read(mp, 0x7c);
1347 /* Non MIB hardware counters */
1348 p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT);
1349 p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT);
1350 spin_unlock_bh(&mp->mib_counters_lock);
1351 }
1352
1353 static void mib_counters_timer_wrapper(unsigned long _mp)
1354 {
1355 struct mv643xx_eth_private *mp = (void *)_mp;
1356 mib_counters_update(mp);
1357 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1358 }
1359
1360
1361 /* interrupt coalescing *****************************************************/
1362 /*
1363 * Hardware coalescing parameters are set in units of 64 t_clk
1364 * cycles. I.e.:
1365 *
1366 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1367 *
1368 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1369 *
1370 * In the ->set*() methods, we round the computed register value
1371 * to the nearest integer.
1372 */
1373 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1374 {
1375 u32 val = rdlp(mp, SDMA_CONFIG);
1376 u64 temp;
1377
1378 if (mp->shared->extended_rx_coal_limit)
1379 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1380 else
1381 temp = (val & 0x003fff00) >> 8;
1382
1383 temp *= 64000000;
1384 do_div(temp, mp->t_clk);
1385
1386 return (unsigned int)temp;
1387 }
1388
1389 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1390 {
1391 u64 temp;
1392 u32 val;
1393
1394 temp = (u64)usec * mp->t_clk;
1395 temp += 31999999;
1396 do_div(temp, 64000000);
1397
1398 val = rdlp(mp, SDMA_CONFIG);
1399 if (mp->shared->extended_rx_coal_limit) {
1400 if (temp > 0xffff)
1401 temp = 0xffff;
1402 val &= ~0x023fff80;
1403 val |= (temp & 0x8000) << 10;
1404 val |= (temp & 0x7fff) << 7;
1405 } else {
1406 if (temp > 0x3fff)
1407 temp = 0x3fff;
1408 val &= ~0x003fff00;
1409 val |= (temp & 0x3fff) << 8;
1410 }
1411 wrlp(mp, SDMA_CONFIG, val);
1412 }
1413
1414 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1415 {
1416 u64 temp;
1417
1418 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1419 temp *= 64000000;
1420 do_div(temp, mp->t_clk);
1421
1422 return (unsigned int)temp;
1423 }
1424
1425 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1426 {
1427 u64 temp;
1428
1429 temp = (u64)usec * mp->t_clk;
1430 temp += 31999999;
1431 do_div(temp, 64000000);
1432
1433 if (temp > 0x3fff)
1434 temp = 0x3fff;
1435
1436 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1437 }
1438
1439
1440 /* ethtool ******************************************************************/
1441 struct mv643xx_eth_stats {
1442 char stat_string[ETH_GSTRING_LEN];
1443 int sizeof_stat;
1444 int netdev_off;
1445 int mp_off;
1446 };
1447
1448 #define SSTAT(m) \
1449 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1450 offsetof(struct net_device, stats.m), -1 }
1451
1452 #define MIBSTAT(m) \
1453 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1454 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1455
1456 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1457 SSTAT(rx_packets),
1458 SSTAT(tx_packets),
1459 SSTAT(rx_bytes),
1460 SSTAT(tx_bytes),
1461 SSTAT(rx_errors),
1462 SSTAT(tx_errors),
1463 SSTAT(rx_dropped),
1464 SSTAT(tx_dropped),
1465 MIBSTAT(good_octets_received),
1466 MIBSTAT(bad_octets_received),
1467 MIBSTAT(internal_mac_transmit_err),
1468 MIBSTAT(good_frames_received),
1469 MIBSTAT(bad_frames_received),
1470 MIBSTAT(broadcast_frames_received),
1471 MIBSTAT(multicast_frames_received),
1472 MIBSTAT(frames_64_octets),
1473 MIBSTAT(frames_65_to_127_octets),
1474 MIBSTAT(frames_128_to_255_octets),
1475 MIBSTAT(frames_256_to_511_octets),
1476 MIBSTAT(frames_512_to_1023_octets),
1477 MIBSTAT(frames_1024_to_max_octets),
1478 MIBSTAT(good_octets_sent),
1479 MIBSTAT(good_frames_sent),
1480 MIBSTAT(excessive_collision),
1481 MIBSTAT(multicast_frames_sent),
1482 MIBSTAT(broadcast_frames_sent),
1483 MIBSTAT(unrec_mac_control_received),
1484 MIBSTAT(fc_sent),
1485 MIBSTAT(good_fc_received),
1486 MIBSTAT(bad_fc_received),
1487 MIBSTAT(undersize_received),
1488 MIBSTAT(fragments_received),
1489 MIBSTAT(oversize_received),
1490 MIBSTAT(jabber_received),
1491 MIBSTAT(mac_receive_error),
1492 MIBSTAT(bad_crc_event),
1493 MIBSTAT(collision),
1494 MIBSTAT(late_collision),
1495 MIBSTAT(rx_discard),
1496 MIBSTAT(rx_overrun),
1497 };
1498
1499 static int
1500 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1501 struct ethtool_cmd *cmd)
1502 {
1503 int err;
1504
1505 err = phy_read_status(mp->phy);
1506 if (err == 0)
1507 err = phy_ethtool_gset(mp->phy, cmd);
1508
1509 /*
1510 * The MAC does not support 1000baseT_Half.
1511 */
1512 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1513 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1514
1515 return err;
1516 }
1517
1518 static int
1519 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1520 struct ethtool_cmd *cmd)
1521 {
1522 u32 port_status;
1523
1524 port_status = rdlp(mp, PORT_STATUS);
1525
1526 cmd->supported = SUPPORTED_MII;
1527 cmd->advertising = ADVERTISED_MII;
1528 switch (port_status & PORT_SPEED_MASK) {
1529 case PORT_SPEED_10:
1530 ethtool_cmd_speed_set(cmd, SPEED_10);
1531 break;
1532 case PORT_SPEED_100:
1533 ethtool_cmd_speed_set(cmd, SPEED_100);
1534 break;
1535 case PORT_SPEED_1000:
1536 ethtool_cmd_speed_set(cmd, SPEED_1000);
1537 break;
1538 default:
1539 cmd->speed = -1;
1540 break;
1541 }
1542 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1543 cmd->port = PORT_MII;
1544 cmd->phy_address = 0;
1545 cmd->transceiver = XCVR_INTERNAL;
1546 cmd->autoneg = AUTONEG_DISABLE;
1547 cmd->maxtxpkt = 1;
1548 cmd->maxrxpkt = 1;
1549
1550 return 0;
1551 }
1552
1553 static void
1554 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1555 {
1556 struct mv643xx_eth_private *mp = netdev_priv(dev);
1557 wol->supported = 0;
1558 wol->wolopts = 0;
1559 if (mp->phy)
1560 phy_ethtool_get_wol(mp->phy, wol);
1561 }
1562
1563 static int
1564 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1565 {
1566 struct mv643xx_eth_private *mp = netdev_priv(dev);
1567 int err;
1568
1569 if (mp->phy == NULL)
1570 return -EOPNOTSUPP;
1571
1572 err = phy_ethtool_set_wol(mp->phy, wol);
1573 /* Given that mv643xx_eth works without the marvell-specific PHY driver,
1574 * this debugging hint is useful to have.
1575 */
1576 if (err == -EOPNOTSUPP)
1577 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n");
1578 return err;
1579 }
1580
1581 static int
1582 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1583 {
1584 struct mv643xx_eth_private *mp = netdev_priv(dev);
1585
1586 if (mp->phy != NULL)
1587 return mv643xx_eth_get_settings_phy(mp, cmd);
1588 else
1589 return mv643xx_eth_get_settings_phyless(mp, cmd);
1590 }
1591
1592 static int
1593 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1594 {
1595 struct mv643xx_eth_private *mp = netdev_priv(dev);
1596 int ret;
1597
1598 if (mp->phy == NULL)
1599 return -EINVAL;
1600
1601 /*
1602 * The MAC does not support 1000baseT_Half.
1603 */
1604 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1605
1606 ret = phy_ethtool_sset(mp->phy, cmd);
1607 if (!ret)
1608 mv643xx_eth_adjust_link(dev);
1609 return ret;
1610 }
1611
1612 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1613 struct ethtool_drvinfo *drvinfo)
1614 {
1615 strlcpy(drvinfo->driver, mv643xx_eth_driver_name,
1616 sizeof(drvinfo->driver));
1617 strlcpy(drvinfo->version, mv643xx_eth_driver_version,
1618 sizeof(drvinfo->version));
1619 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
1620 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
1621 }
1622
1623 static int mv643xx_eth_nway_reset(struct net_device *dev)
1624 {
1625 struct mv643xx_eth_private *mp = netdev_priv(dev);
1626
1627 if (mp->phy == NULL)
1628 return -EINVAL;
1629
1630 return genphy_restart_aneg(mp->phy);
1631 }
1632
1633 static int
1634 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1635 {
1636 struct mv643xx_eth_private *mp = netdev_priv(dev);
1637
1638 ec->rx_coalesce_usecs = get_rx_coal(mp);
1639 ec->tx_coalesce_usecs = get_tx_coal(mp);
1640
1641 return 0;
1642 }
1643
1644 static int
1645 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1646 {
1647 struct mv643xx_eth_private *mp = netdev_priv(dev);
1648
1649 set_rx_coal(mp, ec->rx_coalesce_usecs);
1650 set_tx_coal(mp, ec->tx_coalesce_usecs);
1651
1652 return 0;
1653 }
1654
1655 static void
1656 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1657 {
1658 struct mv643xx_eth_private *mp = netdev_priv(dev);
1659
1660 er->rx_max_pending = 4096;
1661 er->tx_max_pending = 4096;
1662
1663 er->rx_pending = mp->rx_ring_size;
1664 er->tx_pending = mp->tx_ring_size;
1665 }
1666
1667 static int
1668 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1669 {
1670 struct mv643xx_eth_private *mp = netdev_priv(dev);
1671
1672 if (er->rx_mini_pending || er->rx_jumbo_pending)
1673 return -EINVAL;
1674
1675 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1676 mp->tx_ring_size = clamp_t(unsigned int, er->tx_pending,
1677 MV643XX_MAX_SKB_DESCS * 2, 4096);
1678 if (mp->tx_ring_size != er->tx_pending)
1679 netdev_warn(dev, "TX queue size set to %u (requested %u)\n",
1680 mp->tx_ring_size, er->tx_pending);
1681
1682 if (netif_running(dev)) {
1683 mv643xx_eth_stop(dev);
1684 if (mv643xx_eth_open(dev)) {
1685 netdev_err(dev,
1686 "fatal error on re-opening device after ring param change\n");
1687 return -ENOMEM;
1688 }
1689 }
1690
1691 return 0;
1692 }
1693
1694
1695 static int
1696 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features)
1697 {
1698 struct mv643xx_eth_private *mp = netdev_priv(dev);
1699 bool rx_csum = features & NETIF_F_RXCSUM;
1700
1701 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1702
1703 return 0;
1704 }
1705
1706 static void mv643xx_eth_get_strings(struct net_device *dev,
1707 uint32_t stringset, uint8_t *data)
1708 {
1709 int i;
1710
1711 if (stringset == ETH_SS_STATS) {
1712 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1713 memcpy(data + i * ETH_GSTRING_LEN,
1714 mv643xx_eth_stats[i].stat_string,
1715 ETH_GSTRING_LEN);
1716 }
1717 }
1718 }
1719
1720 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1721 struct ethtool_stats *stats,
1722 uint64_t *data)
1723 {
1724 struct mv643xx_eth_private *mp = netdev_priv(dev);
1725 int i;
1726
1727 mv643xx_eth_get_stats(dev);
1728 mib_counters_update(mp);
1729
1730 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1731 const struct mv643xx_eth_stats *stat;
1732 void *p;
1733
1734 stat = mv643xx_eth_stats + i;
1735
1736 if (stat->netdev_off >= 0)
1737 p = ((void *)mp->dev) + stat->netdev_off;
1738 else
1739 p = ((void *)mp) + stat->mp_off;
1740
1741 data[i] = (stat->sizeof_stat == 8) ?
1742 *(uint64_t *)p : *(uint32_t *)p;
1743 }
1744 }
1745
1746 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1747 {
1748 if (sset == ETH_SS_STATS)
1749 return ARRAY_SIZE(mv643xx_eth_stats);
1750
1751 return -EOPNOTSUPP;
1752 }
1753
1754 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1755 .get_settings = mv643xx_eth_get_settings,
1756 .set_settings = mv643xx_eth_set_settings,
1757 .get_drvinfo = mv643xx_eth_get_drvinfo,
1758 .nway_reset = mv643xx_eth_nway_reset,
1759 .get_link = ethtool_op_get_link,
1760 .get_coalesce = mv643xx_eth_get_coalesce,
1761 .set_coalesce = mv643xx_eth_set_coalesce,
1762 .get_ringparam = mv643xx_eth_get_ringparam,
1763 .set_ringparam = mv643xx_eth_set_ringparam,
1764 .get_strings = mv643xx_eth_get_strings,
1765 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1766 .get_sset_count = mv643xx_eth_get_sset_count,
1767 .get_ts_info = ethtool_op_get_ts_info,
1768 .get_wol = mv643xx_eth_get_wol,
1769 .set_wol = mv643xx_eth_set_wol,
1770 };
1771
1772
1773 /* address handling *********************************************************/
1774 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1775 {
1776 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1777 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1778
1779 addr[0] = (mac_h >> 24) & 0xff;
1780 addr[1] = (mac_h >> 16) & 0xff;
1781 addr[2] = (mac_h >> 8) & 0xff;
1782 addr[3] = mac_h & 0xff;
1783 addr[4] = (mac_l >> 8) & 0xff;
1784 addr[5] = mac_l & 0xff;
1785 }
1786
1787 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1788 {
1789 wrlp(mp, MAC_ADDR_HIGH,
1790 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1791 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1792 }
1793
1794 static u32 uc_addr_filter_mask(struct net_device *dev)
1795 {
1796 struct netdev_hw_addr *ha;
1797 u32 nibbles;
1798
1799 if (dev->flags & IFF_PROMISC)
1800 return 0;
1801
1802 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1803 netdev_for_each_uc_addr(ha, dev) {
1804 if (memcmp(dev->dev_addr, ha->addr, 5))
1805 return 0;
1806 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1807 return 0;
1808
1809 nibbles |= 1 << (ha->addr[5] & 0x0f);
1810 }
1811
1812 return nibbles;
1813 }
1814
1815 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1816 {
1817 struct mv643xx_eth_private *mp = netdev_priv(dev);
1818 u32 port_config;
1819 u32 nibbles;
1820 int i;
1821
1822 uc_addr_set(mp, dev->dev_addr);
1823
1824 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1825
1826 nibbles = uc_addr_filter_mask(dev);
1827 if (!nibbles) {
1828 port_config |= UNICAST_PROMISCUOUS_MODE;
1829 nibbles = 0xffff;
1830 }
1831
1832 for (i = 0; i < 16; i += 4) {
1833 int off = UNICAST_TABLE(mp->port_num) + i;
1834 u32 v;
1835
1836 v = 0;
1837 if (nibbles & 1)
1838 v |= 0x00000001;
1839 if (nibbles & 2)
1840 v |= 0x00000100;
1841 if (nibbles & 4)
1842 v |= 0x00010000;
1843 if (nibbles & 8)
1844 v |= 0x01000000;
1845 nibbles >>= 4;
1846
1847 wrl(mp, off, v);
1848 }
1849
1850 wrlp(mp, PORT_CONFIG, port_config);
1851 }
1852
1853 static int addr_crc(unsigned char *addr)
1854 {
1855 int crc = 0;
1856 int i;
1857
1858 for (i = 0; i < 6; i++) {
1859 int j;
1860
1861 crc = (crc ^ addr[i]) << 8;
1862 for (j = 7; j >= 0; j--) {
1863 if (crc & (0x100 << j))
1864 crc ^= 0x107 << j;
1865 }
1866 }
1867
1868 return crc;
1869 }
1870
1871 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1872 {
1873 struct mv643xx_eth_private *mp = netdev_priv(dev);
1874 u32 *mc_spec;
1875 u32 *mc_other;
1876 struct netdev_hw_addr *ha;
1877 int i;
1878
1879 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI))
1880 goto promiscuous;
1881
1882 /* Allocate both mc_spec and mc_other tables */
1883 mc_spec = kcalloc(128, sizeof(u32), GFP_ATOMIC);
1884 if (!mc_spec)
1885 goto promiscuous;
1886 mc_other = &mc_spec[64];
1887
1888 netdev_for_each_mc_addr(ha, dev) {
1889 u8 *a = ha->addr;
1890 u32 *table;
1891 u8 entry;
1892
1893 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1894 table = mc_spec;
1895 entry = a[5];
1896 } else {
1897 table = mc_other;
1898 entry = addr_crc(a);
1899 }
1900
1901 table[entry >> 2] |= 1 << (8 * (entry & 3));
1902 }
1903
1904 for (i = 0; i < 64; i++) {
1905 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1906 mc_spec[i]);
1907 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1908 mc_other[i]);
1909 }
1910
1911 kfree(mc_spec);
1912 return;
1913
1914 promiscuous:
1915 for (i = 0; i < 64; i++) {
1916 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1917 0x01010101u);
1918 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32),
1919 0x01010101u);
1920 }
1921 }
1922
1923 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1924 {
1925 mv643xx_eth_program_unicast_filter(dev);
1926 mv643xx_eth_program_multicast_filter(dev);
1927 }
1928
1929 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1930 {
1931 struct sockaddr *sa = addr;
1932
1933 if (!is_valid_ether_addr(sa->sa_data))
1934 return -EADDRNOTAVAIL;
1935
1936 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1937
1938 netif_addr_lock_bh(dev);
1939 mv643xx_eth_program_unicast_filter(dev);
1940 netif_addr_unlock_bh(dev);
1941
1942 return 0;
1943 }
1944
1945
1946 /* rx/tx queue initialisation ***********************************************/
1947 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1948 {
1949 struct rx_queue *rxq = mp->rxq + index;
1950 struct rx_desc *rx_desc;
1951 int size;
1952 int i;
1953
1954 rxq->index = index;
1955
1956 rxq->rx_ring_size = mp->rx_ring_size;
1957
1958 rxq->rx_desc_count = 0;
1959 rxq->rx_curr_desc = 0;
1960 rxq->rx_used_desc = 0;
1961
1962 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1963
1964 if (index == 0 && size <= mp->rx_desc_sram_size) {
1965 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1966 mp->rx_desc_sram_size);
1967 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1968 } else {
1969 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1970 size, &rxq->rx_desc_dma,
1971 GFP_KERNEL);
1972 }
1973
1974 if (rxq->rx_desc_area == NULL) {
1975 netdev_err(mp->dev,
1976 "can't allocate rx ring (%d bytes)\n", size);
1977 goto out;
1978 }
1979 memset(rxq->rx_desc_area, 0, size);
1980
1981 rxq->rx_desc_area_size = size;
1982 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb),
1983 GFP_KERNEL);
1984 if (rxq->rx_skb == NULL)
1985 goto out_free;
1986
1987 rx_desc = rxq->rx_desc_area;
1988 for (i = 0; i < rxq->rx_ring_size; i++) {
1989 int nexti;
1990
1991 nexti = i + 1;
1992 if (nexti == rxq->rx_ring_size)
1993 nexti = 0;
1994
1995 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1996 nexti * sizeof(struct rx_desc);
1997 }
1998
1999 return 0;
2000
2001
2002 out_free:
2003 if (index == 0 && size <= mp->rx_desc_sram_size)
2004 iounmap(rxq->rx_desc_area);
2005 else
2006 dma_free_coherent(mp->dev->dev.parent, size,
2007 rxq->rx_desc_area,
2008 rxq->rx_desc_dma);
2009
2010 out:
2011 return -ENOMEM;
2012 }
2013
2014 static void rxq_deinit(struct rx_queue *rxq)
2015 {
2016 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
2017 int i;
2018
2019 rxq_disable(rxq);
2020
2021 for (i = 0; i < rxq->rx_ring_size; i++) {
2022 if (rxq->rx_skb[i]) {
2023 dev_kfree_skb(rxq->rx_skb[i]);
2024 rxq->rx_desc_count--;
2025 }
2026 }
2027
2028 if (rxq->rx_desc_count) {
2029 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n",
2030 rxq->rx_desc_count);
2031 }
2032
2033 if (rxq->index == 0 &&
2034 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
2035 iounmap(rxq->rx_desc_area);
2036 else
2037 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
2038 rxq->rx_desc_area, rxq->rx_desc_dma);
2039
2040 kfree(rxq->rx_skb);
2041 }
2042
2043 static int txq_init(struct mv643xx_eth_private *mp, int index)
2044 {
2045 struct tx_queue *txq = mp->txq + index;
2046 struct tx_desc *tx_desc;
2047 int size;
2048 int ret;
2049 int i;
2050
2051 txq->index = index;
2052
2053 txq->tx_ring_size = mp->tx_ring_size;
2054
2055 /* A queue must always have room for at least one skb.
2056 * Therefore, stop the queue when the free entries reaches
2057 * the maximum number of descriptors per skb.
2058 */
2059 txq->tx_stop_threshold = txq->tx_ring_size - MV643XX_MAX_SKB_DESCS;
2060 txq->tx_wake_threshold = txq->tx_stop_threshold / 2;
2061
2062 txq->tx_desc_count = 0;
2063 txq->tx_curr_desc = 0;
2064 txq->tx_used_desc = 0;
2065
2066 size = txq->tx_ring_size * sizeof(struct tx_desc);
2067
2068 if (index == 0 && size <= mp->tx_desc_sram_size) {
2069 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
2070 mp->tx_desc_sram_size);
2071 txq->tx_desc_dma = mp->tx_desc_sram_addr;
2072 } else {
2073 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
2074 size, &txq->tx_desc_dma,
2075 GFP_KERNEL);
2076 }
2077
2078 if (txq->tx_desc_area == NULL) {
2079 netdev_err(mp->dev,
2080 "can't allocate tx ring (%d bytes)\n", size);
2081 return -ENOMEM;
2082 }
2083 memset(txq->tx_desc_area, 0, size);
2084
2085 txq->tx_desc_area_size = size;
2086
2087 tx_desc = txq->tx_desc_area;
2088 for (i = 0; i < txq->tx_ring_size; i++) {
2089 struct tx_desc *txd = tx_desc + i;
2090 int nexti;
2091
2092 nexti = i + 1;
2093 if (nexti == txq->tx_ring_size)
2094 nexti = 0;
2095
2096 txd->cmd_sts = 0;
2097 txd->next_desc_ptr = txq->tx_desc_dma +
2098 nexti * sizeof(struct tx_desc);
2099 }
2100
2101 txq->tx_desc_mapping = kcalloc(txq->tx_ring_size, sizeof(char),
2102 GFP_KERNEL);
2103 if (!txq->tx_desc_mapping) {
2104 ret = -ENOMEM;
2105 goto err_free_desc_area;
2106 }
2107
2108 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */
2109 txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent,
2110 txq->tx_ring_size * TSO_HEADER_SIZE,
2111 &txq->tso_hdrs_dma, GFP_KERNEL);
2112 if (txq->tso_hdrs == NULL) {
2113 ret = -ENOMEM;
2114 goto err_free_desc_mapping;
2115 }
2116 skb_queue_head_init(&txq->tx_skb);
2117
2118 return 0;
2119
2120 err_free_desc_mapping:
2121 kfree(txq->tx_desc_mapping);
2122 err_free_desc_area:
2123 if (index == 0 && size <= mp->tx_desc_sram_size)
2124 iounmap(txq->tx_desc_area);
2125 else
2126 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2127 txq->tx_desc_area, txq->tx_desc_dma);
2128 return ret;
2129 }
2130
2131 static void txq_deinit(struct tx_queue *txq)
2132 {
2133 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2134
2135 txq_disable(txq);
2136 txq_reclaim(txq, txq->tx_ring_size, 1);
2137
2138 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2139
2140 if (txq->index == 0 &&
2141 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2142 iounmap(txq->tx_desc_area);
2143 else
2144 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2145 txq->tx_desc_area, txq->tx_desc_dma);
2146 kfree(txq->tx_desc_mapping);
2147
2148 if (txq->tso_hdrs)
2149 dma_free_coherent(mp->dev->dev.parent,
2150 txq->tx_ring_size * TSO_HEADER_SIZE,
2151 txq->tso_hdrs, txq->tso_hdrs_dma);
2152 }
2153
2154
2155 /* netdev ops and related ***************************************************/
2156 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2157 {
2158 u32 int_cause;
2159 u32 int_cause_ext;
2160
2161 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
2162 if (int_cause == 0)
2163 return 0;
2164
2165 int_cause_ext = 0;
2166 if (int_cause & INT_EXT) {
2167 int_cause &= ~INT_EXT;
2168 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2169 }
2170
2171 if (int_cause) {
2172 wrlp(mp, INT_CAUSE, ~int_cause);
2173 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2174 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2175 mp->work_rx |= (int_cause & INT_RX) >> 2;
2176 }
2177
2178 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2179 if (int_cause_ext) {
2180 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2181 if (int_cause_ext & INT_EXT_LINK_PHY)
2182 mp->work_link = 1;
2183 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2184 }
2185
2186 return 1;
2187 }
2188
2189 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2190 {
2191 struct net_device *dev = (struct net_device *)dev_id;
2192 struct mv643xx_eth_private *mp = netdev_priv(dev);
2193
2194 if (unlikely(!mv643xx_eth_collect_events(mp)))
2195 return IRQ_NONE;
2196
2197 wrlp(mp, INT_MASK, 0);
2198 napi_schedule(&mp->napi);
2199
2200 return IRQ_HANDLED;
2201 }
2202
2203 static void handle_link_event(struct mv643xx_eth_private *mp)
2204 {
2205 struct net_device *dev = mp->dev;
2206 u32 port_status;
2207 int speed;
2208 int duplex;
2209 int fc;
2210
2211 port_status = rdlp(mp, PORT_STATUS);
2212 if (!(port_status & LINK_UP)) {
2213 if (netif_carrier_ok(dev)) {
2214 int i;
2215
2216 netdev_info(dev, "link down\n");
2217
2218 netif_carrier_off(dev);
2219
2220 for (i = 0; i < mp->txq_count; i++) {
2221 struct tx_queue *txq = mp->txq + i;
2222
2223 txq_reclaim(txq, txq->tx_ring_size, 1);
2224 txq_reset_hw_ptr(txq);
2225 }
2226 }
2227 return;
2228 }
2229
2230 switch (port_status & PORT_SPEED_MASK) {
2231 case PORT_SPEED_10:
2232 speed = 10;
2233 break;
2234 case PORT_SPEED_100:
2235 speed = 100;
2236 break;
2237 case PORT_SPEED_1000:
2238 speed = 1000;
2239 break;
2240 default:
2241 speed = -1;
2242 break;
2243 }
2244 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2245 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2246
2247 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n",
2248 speed, duplex ? "full" : "half", fc ? "en" : "dis");
2249
2250 if (!netif_carrier_ok(dev))
2251 netif_carrier_on(dev);
2252 }
2253
2254 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2255 {
2256 struct mv643xx_eth_private *mp;
2257 int work_done;
2258
2259 mp = container_of(napi, struct mv643xx_eth_private, napi);
2260
2261 if (unlikely(mp->oom)) {
2262 mp->oom = 0;
2263 del_timer(&mp->rx_oom);
2264 }
2265
2266 work_done = 0;
2267 while (work_done < budget) {
2268 u8 queue_mask;
2269 int queue;
2270 int work_tbd;
2271
2272 if (mp->work_link) {
2273 mp->work_link = 0;
2274 handle_link_event(mp);
2275 work_done++;
2276 continue;
2277 }
2278
2279 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2280 if (likely(!mp->oom))
2281 queue_mask |= mp->work_rx_refill;
2282
2283 if (!queue_mask) {
2284 if (mv643xx_eth_collect_events(mp))
2285 continue;
2286 break;
2287 }
2288
2289 queue = fls(queue_mask) - 1;
2290 queue_mask = 1 << queue;
2291
2292 work_tbd = budget - work_done;
2293 if (work_tbd > 16)
2294 work_tbd = 16;
2295
2296 if (mp->work_tx_end & queue_mask) {
2297 txq_kick(mp->txq + queue);
2298 } else if (mp->work_tx & queue_mask) {
2299 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2300 txq_maybe_wake(mp->txq + queue);
2301 } else if (mp->work_rx & queue_mask) {
2302 work_done += rxq_process(mp->rxq + queue, work_tbd);
2303 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2304 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2305 } else {
2306 BUG();
2307 }
2308 }
2309
2310 if (work_done < budget) {
2311 if (mp->oom)
2312 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2313 napi_complete(napi);
2314 wrlp(mp, INT_MASK, mp->int_mask);
2315 }
2316
2317 return work_done;
2318 }
2319
2320 static inline void oom_timer_wrapper(unsigned long data)
2321 {
2322 struct mv643xx_eth_private *mp = (void *)data;
2323
2324 napi_schedule(&mp->napi);
2325 }
2326
2327 static void port_start(struct mv643xx_eth_private *mp)
2328 {
2329 u32 pscr;
2330 int i;
2331
2332 /*
2333 * Perform PHY reset, if there is a PHY.
2334 */
2335 if (mp->phy != NULL) {
2336 struct ethtool_cmd cmd;
2337
2338 mv643xx_eth_get_settings(mp->dev, &cmd);
2339 phy_init_hw(mp->phy);
2340 mv643xx_eth_set_settings(mp->dev, &cmd);
2341 phy_start(mp->phy);
2342 }
2343
2344 /*
2345 * Configure basic link parameters.
2346 */
2347 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2348
2349 pscr |= SERIAL_PORT_ENABLE;
2350 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2351
2352 pscr |= DO_NOT_FORCE_LINK_FAIL;
2353 if (mp->phy == NULL)
2354 pscr |= FORCE_LINK_PASS;
2355 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2356
2357 /*
2358 * Configure TX path and queues.
2359 */
2360 tx_set_rate(mp, 1000000000, 16777216);
2361 for (i = 0; i < mp->txq_count; i++) {
2362 struct tx_queue *txq = mp->txq + i;
2363
2364 txq_reset_hw_ptr(txq);
2365 txq_set_rate(txq, 1000000000, 16777216);
2366 txq_set_fixed_prio_mode(txq);
2367 }
2368
2369 /*
2370 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2371 * frames to RX queue #0, and include the pseudo-header when
2372 * calculating receive checksums.
2373 */
2374 mv643xx_eth_set_features(mp->dev, mp->dev->features);
2375
2376 /*
2377 * Treat BPDUs as normal multicasts, and disable partition mode.
2378 */
2379 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2380
2381 /*
2382 * Add configured unicast addresses to address filter table.
2383 */
2384 mv643xx_eth_program_unicast_filter(mp->dev);
2385
2386 /*
2387 * Enable the receive queues.
2388 */
2389 for (i = 0; i < mp->rxq_count; i++) {
2390 struct rx_queue *rxq = mp->rxq + i;
2391 u32 addr;
2392
2393 addr = (u32)rxq->rx_desc_dma;
2394 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2395 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2396
2397 rxq_enable(rxq);
2398 }
2399 }
2400
2401 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2402 {
2403 int skb_size;
2404
2405 /*
2406 * Reserve 2+14 bytes for an ethernet header (the hardware
2407 * automatically prepends 2 bytes of dummy data to each
2408 * received packet), 16 bytes for up to four VLAN tags, and
2409 * 4 bytes for the trailing FCS -- 36 bytes total.
2410 */
2411 skb_size = mp->dev->mtu + 36;
2412
2413 /*
2414 * Make sure that the skb size is a multiple of 8 bytes, as
2415 * the lower three bits of the receive descriptor's buffer
2416 * size field are ignored by the hardware.
2417 */
2418 mp->skb_size = (skb_size + 7) & ~7;
2419
2420 /*
2421 * If NET_SKB_PAD is smaller than a cache line,
2422 * netdev_alloc_skb() will cause skb->data to be misaligned
2423 * to a cache line boundary. If this is the case, include
2424 * some extra space to allow re-aligning the data area.
2425 */
2426 mp->skb_size += SKB_DMA_REALIGN;
2427 }
2428
2429 static int mv643xx_eth_open(struct net_device *dev)
2430 {
2431 struct mv643xx_eth_private *mp = netdev_priv(dev);
2432 int err;
2433 int i;
2434
2435 wrlp(mp, INT_CAUSE, 0);
2436 wrlp(mp, INT_CAUSE_EXT, 0);
2437 rdlp(mp, INT_CAUSE_EXT);
2438
2439 err = request_irq(dev->irq, mv643xx_eth_irq,
2440 IRQF_SHARED, dev->name, dev);
2441 if (err) {
2442 netdev_err(dev, "can't assign irq\n");
2443 return -EAGAIN;
2444 }
2445
2446 mv643xx_eth_recalc_skb_size(mp);
2447
2448 napi_enable(&mp->napi);
2449
2450 mp->int_mask = INT_EXT;
2451
2452 for (i = 0; i < mp->rxq_count; i++) {
2453 err = rxq_init(mp, i);
2454 if (err) {
2455 while (--i >= 0)
2456 rxq_deinit(mp->rxq + i);
2457 goto out;
2458 }
2459
2460 rxq_refill(mp->rxq + i, INT_MAX);
2461 mp->int_mask |= INT_RX_0 << i;
2462 }
2463
2464 if (mp->oom) {
2465 mp->rx_oom.expires = jiffies + (HZ / 10);
2466 add_timer(&mp->rx_oom);
2467 }
2468
2469 for (i = 0; i < mp->txq_count; i++) {
2470 err = txq_init(mp, i);
2471 if (err) {
2472 while (--i >= 0)
2473 txq_deinit(mp->txq + i);
2474 goto out_free;
2475 }
2476 mp->int_mask |= INT_TX_END_0 << i;
2477 }
2478
2479 add_timer(&mp->mib_counters_timer);
2480 port_start(mp);
2481
2482 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2483 wrlp(mp, INT_MASK, mp->int_mask);
2484
2485 return 0;
2486
2487
2488 out_free:
2489 for (i = 0; i < mp->rxq_count; i++)
2490 rxq_deinit(mp->rxq + i);
2491 out:
2492 free_irq(dev->irq, dev);
2493
2494 return err;
2495 }
2496
2497 static void port_reset(struct mv643xx_eth_private *mp)
2498 {
2499 unsigned int data;
2500 int i;
2501
2502 for (i = 0; i < mp->rxq_count; i++)
2503 rxq_disable(mp->rxq + i);
2504 for (i = 0; i < mp->txq_count; i++)
2505 txq_disable(mp->txq + i);
2506
2507 while (1) {
2508 u32 ps = rdlp(mp, PORT_STATUS);
2509
2510 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2511 break;
2512 udelay(10);
2513 }
2514
2515 /* Reset the Enable bit in the Configuration Register */
2516 data = rdlp(mp, PORT_SERIAL_CONTROL);
2517 data &= ~(SERIAL_PORT_ENABLE |
2518 DO_NOT_FORCE_LINK_FAIL |
2519 FORCE_LINK_PASS);
2520 wrlp(mp, PORT_SERIAL_CONTROL, data);
2521 }
2522
2523 static int mv643xx_eth_stop(struct net_device *dev)
2524 {
2525 struct mv643xx_eth_private *mp = netdev_priv(dev);
2526 int i;
2527
2528 wrlp(mp, INT_MASK_EXT, 0x00000000);
2529 wrlp(mp, INT_MASK, 0x00000000);
2530 rdlp(mp, INT_MASK);
2531
2532 napi_disable(&mp->napi);
2533
2534 del_timer_sync(&mp->rx_oom);
2535
2536 netif_carrier_off(dev);
2537 if (mp->phy)
2538 phy_stop(mp->phy);
2539 free_irq(dev->irq, dev);
2540
2541 port_reset(mp);
2542 mv643xx_eth_get_stats(dev);
2543 mib_counters_update(mp);
2544 del_timer_sync(&mp->mib_counters_timer);
2545
2546 for (i = 0; i < mp->rxq_count; i++)
2547 rxq_deinit(mp->rxq + i);
2548 for (i = 0; i < mp->txq_count; i++)
2549 txq_deinit(mp->txq + i);
2550
2551 return 0;
2552 }
2553
2554 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2555 {
2556 struct mv643xx_eth_private *mp = netdev_priv(dev);
2557 int ret;
2558
2559 if (mp->phy == NULL)
2560 return -ENOTSUPP;
2561
2562 ret = phy_mii_ioctl(mp->phy, ifr, cmd);
2563 if (!ret)
2564 mv643xx_eth_adjust_link(dev);
2565 return ret;
2566 }
2567
2568 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2569 {
2570 struct mv643xx_eth_private *mp = netdev_priv(dev);
2571
2572 if (new_mtu < 64 || new_mtu > 9500)
2573 return -EINVAL;
2574
2575 dev->mtu = new_mtu;
2576 mv643xx_eth_recalc_skb_size(mp);
2577 tx_set_rate(mp, 1000000000, 16777216);
2578
2579 if (!netif_running(dev))
2580 return 0;
2581
2582 /*
2583 * Stop and then re-open the interface. This will allocate RX
2584 * skbs of the new MTU.
2585 * There is a possible danger that the open will not succeed,
2586 * due to memory being full.
2587 */
2588 mv643xx_eth_stop(dev);
2589 if (mv643xx_eth_open(dev)) {
2590 netdev_err(dev,
2591 "fatal error on re-opening device after MTU change\n");
2592 }
2593
2594 return 0;
2595 }
2596
2597 static void tx_timeout_task(struct work_struct *ugly)
2598 {
2599 struct mv643xx_eth_private *mp;
2600
2601 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2602 if (netif_running(mp->dev)) {
2603 netif_tx_stop_all_queues(mp->dev);
2604 port_reset(mp);
2605 port_start(mp);
2606 netif_tx_wake_all_queues(mp->dev);
2607 }
2608 }
2609
2610 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2611 {
2612 struct mv643xx_eth_private *mp = netdev_priv(dev);
2613
2614 netdev_info(dev, "tx timeout\n");
2615
2616 schedule_work(&mp->tx_timeout_task);
2617 }
2618
2619 #ifdef CONFIG_NET_POLL_CONTROLLER
2620 static void mv643xx_eth_netpoll(struct net_device *dev)
2621 {
2622 struct mv643xx_eth_private *mp = netdev_priv(dev);
2623
2624 wrlp(mp, INT_MASK, 0x00000000);
2625 rdlp(mp, INT_MASK);
2626
2627 mv643xx_eth_irq(dev->irq, dev);
2628
2629 wrlp(mp, INT_MASK, mp->int_mask);
2630 }
2631 #endif
2632
2633
2634 /* platform glue ************************************************************/
2635 static void
2636 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2637 const struct mbus_dram_target_info *dram)
2638 {
2639 void __iomem *base = msp->base;
2640 u32 win_enable;
2641 u32 win_protect;
2642 int i;
2643
2644 for (i = 0; i < 6; i++) {
2645 writel(0, base + WINDOW_BASE(i));
2646 writel(0, base + WINDOW_SIZE(i));
2647 if (i < 4)
2648 writel(0, base + WINDOW_REMAP_HIGH(i));
2649 }
2650
2651 win_enable = 0x3f;
2652 win_protect = 0;
2653
2654 for (i = 0; i < dram->num_cs; i++) {
2655 const struct mbus_dram_window *cs = dram->cs + i;
2656
2657 writel((cs->base & 0xffff0000) |
2658 (cs->mbus_attr << 8) |
2659 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2660 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2661
2662 win_enable &= ~(1 << i);
2663 win_protect |= 3 << (2 * i);
2664 }
2665
2666 writel(win_enable, base + WINDOW_BAR_ENABLE);
2667 msp->win_protect = win_protect;
2668 }
2669
2670 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2671 {
2672 /*
2673 * Check whether we have a 14-bit coal limit field in bits
2674 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2675 * SDMA config register.
2676 */
2677 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2678 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2679 msp->extended_rx_coal_limit = 1;
2680 else
2681 msp->extended_rx_coal_limit = 0;
2682
2683 /*
2684 * Check whether the MAC supports TX rate control, and if
2685 * yes, whether its associated registers are in the old or
2686 * the new place.
2687 */
2688 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2689 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2690 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2691 } else {
2692 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2693 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2694 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2695 else
2696 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2697 }
2698 }
2699
2700 #if defined(CONFIG_OF)
2701 static const struct of_device_id mv643xx_eth_shared_ids[] = {
2702 { .compatible = "marvell,orion-eth", },
2703 { .compatible = "marvell,kirkwood-eth", },
2704 { }
2705 };
2706 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids);
2707 #endif
2708
2709 #if defined(CONFIG_OF) && !defined(CONFIG_MV64X60)
2710 #define mv643xx_eth_property(_np, _name, _v) \
2711 do { \
2712 u32 tmp; \
2713 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \
2714 _v = tmp; \
2715 } while (0)
2716
2717 static struct platform_device *port_platdev[3];
2718
2719 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev,
2720 struct device_node *pnp)
2721 {
2722 struct platform_device *ppdev;
2723 struct mv643xx_eth_platform_data ppd;
2724 struct resource res;
2725 const char *mac_addr;
2726 int ret;
2727 int dev_num = 0;
2728
2729 memset(&ppd, 0, sizeof(ppd));
2730 ppd.shared = pdev;
2731
2732 memset(&res, 0, sizeof(res));
2733 if (!of_irq_to_resource(pnp, 0, &res)) {
2734 dev_err(&pdev->dev, "missing interrupt on %s\n", pnp->name);
2735 return -EINVAL;
2736 }
2737
2738 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) {
2739 dev_err(&pdev->dev, "missing reg property on %s\n", pnp->name);
2740 return -EINVAL;
2741 }
2742
2743 if (ppd.port_number >= 3) {
2744 dev_err(&pdev->dev, "invalid reg property on %s\n", pnp->name);
2745 return -EINVAL;
2746 }
2747
2748 while (dev_num < 3 && port_platdev[dev_num])
2749 dev_num++;
2750
2751 if (dev_num == 3) {
2752 dev_err(&pdev->dev, "too many ports registered\n");
2753 return -EINVAL;
2754 }
2755
2756 mac_addr = of_get_mac_address(pnp);
2757 if (mac_addr)
2758 memcpy(ppd.mac_addr, mac_addr, ETH_ALEN);
2759
2760 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size);
2761 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr);
2762 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size);
2763 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size);
2764 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr);
2765 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size);
2766
2767 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0);
2768 if (!ppd.phy_node) {
2769 ppd.phy_addr = MV643XX_ETH_PHY_NONE;
2770 of_property_read_u32(pnp, "speed", &ppd.speed);
2771 of_property_read_u32(pnp, "duplex", &ppd.duplex);
2772 }
2773
2774 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num);
2775 if (!ppdev)
2776 return -ENOMEM;
2777 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
2778 ppdev->dev.of_node = pnp;
2779
2780 ret = platform_device_add_resources(ppdev, &res, 1);
2781 if (ret)
2782 goto port_err;
2783
2784 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd));
2785 if (ret)
2786 goto port_err;
2787
2788 ret = platform_device_add(ppdev);
2789 if (ret)
2790 goto port_err;
2791
2792 port_platdev[dev_num] = ppdev;
2793
2794 return 0;
2795
2796 port_err:
2797 platform_device_put(ppdev);
2798 return ret;
2799 }
2800
2801 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev)
2802 {
2803 struct mv643xx_eth_shared_platform_data *pd;
2804 struct device_node *pnp, *np = pdev->dev.of_node;
2805 int ret;
2806
2807 /* bail out if not registered from DT */
2808 if (!np)
2809 return 0;
2810
2811 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL);
2812 if (!pd)
2813 return -ENOMEM;
2814 pdev->dev.platform_data = pd;
2815
2816 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit);
2817
2818 for_each_available_child_of_node(np, pnp) {
2819 ret = mv643xx_eth_shared_of_add_port(pdev, pnp);
2820 if (ret) {
2821 of_node_put(pnp);
2822 return ret;
2823 }
2824 }
2825 return 0;
2826 }
2827
2828 static void mv643xx_eth_shared_of_remove(void)
2829 {
2830 int n;
2831
2832 for (n = 0; n < 3; n++) {
2833 platform_device_del(port_platdev[n]);
2834 port_platdev[n] = NULL;
2835 }
2836 }
2837 #else
2838 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev)
2839 {
2840 return 0;
2841 }
2842
2843 static inline void mv643xx_eth_shared_of_remove(void)
2844 {
2845 }
2846 #endif
2847
2848 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2849 {
2850 static int mv643xx_eth_version_printed;
2851 struct mv643xx_eth_shared_platform_data *pd;
2852 struct mv643xx_eth_shared_private *msp;
2853 const struct mbus_dram_target_info *dram;
2854 struct resource *res;
2855 int ret;
2856
2857 if (!mv643xx_eth_version_printed++)
2858 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n",
2859 mv643xx_eth_driver_version);
2860
2861 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2862 if (res == NULL)
2863 return -EINVAL;
2864
2865 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL);
2866 if (msp == NULL)
2867 return -ENOMEM;
2868 platform_set_drvdata(pdev, msp);
2869
2870 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
2871 if (msp->base == NULL)
2872 return -ENOMEM;
2873
2874 msp->clk = devm_clk_get(&pdev->dev, NULL);
2875 if (!IS_ERR(msp->clk))
2876 clk_prepare_enable(msp->clk);
2877
2878 /*
2879 * (Re-)program MBUS remapping windows if we are asked to.
2880 */
2881 dram = mv_mbus_dram_info();
2882 if (dram)
2883 mv643xx_eth_conf_mbus_windows(msp, dram);
2884
2885 ret = mv643xx_eth_shared_of_probe(pdev);
2886 if (ret)
2887 return ret;
2888 pd = dev_get_platdata(&pdev->dev);
2889
2890 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
2891 pd->tx_csum_limit : 9 * 1024;
2892 infer_hw_params(msp);
2893
2894 return 0;
2895 }
2896
2897 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2898 {
2899 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2900
2901 mv643xx_eth_shared_of_remove();
2902 if (!IS_ERR(msp->clk))
2903 clk_disable_unprepare(msp->clk);
2904 return 0;
2905 }
2906
2907 static struct platform_driver mv643xx_eth_shared_driver = {
2908 .probe = mv643xx_eth_shared_probe,
2909 .remove = mv643xx_eth_shared_remove,
2910 .driver = {
2911 .name = MV643XX_ETH_SHARED_NAME,
2912 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids),
2913 },
2914 };
2915
2916 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2917 {
2918 int addr_shift = 5 * mp->port_num;
2919 u32 data;
2920
2921 data = rdl(mp, PHY_ADDR);
2922 data &= ~(0x1f << addr_shift);
2923 data |= (phy_addr & 0x1f) << addr_shift;
2924 wrl(mp, PHY_ADDR, data);
2925 }
2926
2927 static int phy_addr_get(struct mv643xx_eth_private *mp)
2928 {
2929 unsigned int data;
2930
2931 data = rdl(mp, PHY_ADDR);
2932
2933 return (data >> (5 * mp->port_num)) & 0x1f;
2934 }
2935
2936 static void set_params(struct mv643xx_eth_private *mp,
2937 struct mv643xx_eth_platform_data *pd)
2938 {
2939 struct net_device *dev = mp->dev;
2940 unsigned int tx_ring_size;
2941
2942 if (is_valid_ether_addr(pd->mac_addr))
2943 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
2944 else
2945 uc_addr_get(mp, dev->dev_addr);
2946
2947 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2948 if (pd->rx_queue_size)
2949 mp->rx_ring_size = pd->rx_queue_size;
2950 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2951 mp->rx_desc_sram_size = pd->rx_sram_size;
2952
2953 mp->rxq_count = pd->rx_queue_count ? : 1;
2954
2955 tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2956 if (pd->tx_queue_size)
2957 tx_ring_size = pd->tx_queue_size;
2958
2959 mp->tx_ring_size = clamp_t(unsigned int, tx_ring_size,
2960 MV643XX_MAX_SKB_DESCS * 2, 4096);
2961 if (mp->tx_ring_size != tx_ring_size)
2962 netdev_warn(dev, "TX queue size set to %u (requested %u)\n",
2963 mp->tx_ring_size, tx_ring_size);
2964
2965 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2966 mp->tx_desc_sram_size = pd->tx_sram_size;
2967
2968 mp->txq_count = pd->tx_queue_count ? : 1;
2969 }
2970
2971 static int get_phy_mode(struct mv643xx_eth_private *mp)
2972 {
2973 struct device *dev = mp->dev->dev.parent;
2974 int iface = -1;
2975
2976 if (dev->of_node)
2977 iface = of_get_phy_mode(dev->of_node);
2978
2979 /* Historical default if unspecified. We could also read/write
2980 * the interface state in the PSC1
2981 */
2982 if (iface < 0)
2983 iface = PHY_INTERFACE_MODE_GMII;
2984 return iface;
2985 }
2986
2987 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2988 int phy_addr)
2989 {
2990 struct phy_device *phydev;
2991 int start;
2992 int num;
2993 int i;
2994 char phy_id[MII_BUS_ID_SIZE + 3];
2995
2996 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2997 start = phy_addr_get(mp) & 0x1f;
2998 num = 32;
2999 } else {
3000 start = phy_addr & 0x1f;
3001 num = 1;
3002 }
3003
3004 /* Attempt to connect to the PHY using orion-mdio */
3005 phydev = ERR_PTR(-ENODEV);
3006 for (i = 0; i < num; i++) {
3007 int addr = (start + i) & 0x1f;
3008
3009 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
3010 "orion-mdio-mii", addr);
3011
3012 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link,
3013 get_phy_mode(mp));
3014 if (!IS_ERR(phydev)) {
3015 phy_addr_set(mp, addr);
3016 break;
3017 }
3018 }
3019
3020 return phydev;
3021 }
3022
3023 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
3024 {
3025 struct phy_device *phy = mp->phy;
3026
3027 if (speed == 0) {
3028 phy->autoneg = AUTONEG_ENABLE;
3029 phy->speed = 0;
3030 phy->duplex = 0;
3031 phy->advertising = phy->supported | ADVERTISED_Autoneg;
3032 } else {
3033 phy->autoneg = AUTONEG_DISABLE;
3034 phy->advertising = 0;
3035 phy->speed = speed;
3036 phy->duplex = duplex;
3037 }
3038 phy_start_aneg(phy);
3039 }
3040
3041 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
3042 {
3043 u32 pscr;
3044
3045 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
3046 if (pscr & SERIAL_PORT_ENABLE) {
3047 pscr &= ~SERIAL_PORT_ENABLE;
3048 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
3049 }
3050
3051 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
3052 if (mp->phy == NULL) {
3053 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
3054 if (speed == SPEED_1000)
3055 pscr |= SET_GMII_SPEED_TO_1000;
3056 else if (speed == SPEED_100)
3057 pscr |= SET_MII_SPEED_TO_100;
3058
3059 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
3060
3061 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
3062 if (duplex == DUPLEX_FULL)
3063 pscr |= SET_FULL_DUPLEX_MODE;
3064 }
3065
3066 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
3067 }
3068
3069 static const struct net_device_ops mv643xx_eth_netdev_ops = {
3070 .ndo_open = mv643xx_eth_open,
3071 .ndo_stop = mv643xx_eth_stop,
3072 .ndo_start_xmit = mv643xx_eth_xmit,
3073 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
3074 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
3075 .ndo_validate_addr = eth_validate_addr,
3076 .ndo_do_ioctl = mv643xx_eth_ioctl,
3077 .ndo_change_mtu = mv643xx_eth_change_mtu,
3078 .ndo_set_features = mv643xx_eth_set_features,
3079 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
3080 .ndo_get_stats = mv643xx_eth_get_stats,
3081 #ifdef CONFIG_NET_POLL_CONTROLLER
3082 .ndo_poll_controller = mv643xx_eth_netpoll,
3083 #endif
3084 };
3085
3086 static int mv643xx_eth_probe(struct platform_device *pdev)
3087 {
3088 struct mv643xx_eth_platform_data *pd;
3089 struct mv643xx_eth_private *mp;
3090 struct net_device *dev;
3091 struct resource *res;
3092 int err;
3093
3094 pd = dev_get_platdata(&pdev->dev);
3095 if (pd == NULL) {
3096 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n");
3097 return -ENODEV;
3098 }
3099
3100 if (pd->shared == NULL) {
3101 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n");
3102 return -ENODEV;
3103 }
3104
3105 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
3106 if (!dev)
3107 return -ENOMEM;
3108
3109 SET_NETDEV_DEV(dev, &pdev->dev);
3110 mp = netdev_priv(dev);
3111 platform_set_drvdata(pdev, mp);
3112
3113 mp->shared = platform_get_drvdata(pd->shared);
3114 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
3115 mp->port_num = pd->port_number;
3116
3117 mp->dev = dev;
3118
3119 /* Kirkwood resets some registers on gated clocks. Especially
3120 * CLK125_BYPASS_EN must be cleared but is not available on
3121 * all other SoCs/System Controllers using this driver.
3122 */
3123 if (of_device_is_compatible(pdev->dev.of_node,
3124 "marvell,kirkwood-eth-port"))
3125 wrlp(mp, PORT_SERIAL_CONTROL1,
3126 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN);
3127
3128 /*
3129 * Start with a default rate, and if there is a clock, allow
3130 * it to override the default.
3131 */
3132 mp->t_clk = 133000000;
3133 mp->clk = devm_clk_get(&pdev->dev, NULL);
3134 if (!IS_ERR(mp->clk)) {
3135 clk_prepare_enable(mp->clk);
3136 mp->t_clk = clk_get_rate(mp->clk);
3137 } else if (!IS_ERR(mp->shared->clk)) {
3138 mp->t_clk = clk_get_rate(mp->shared->clk);
3139 }
3140
3141 set_params(mp, pd);
3142 netif_set_real_num_tx_queues(dev, mp->txq_count);
3143 netif_set_real_num_rx_queues(dev, mp->rxq_count);
3144
3145 err = 0;
3146 if (pd->phy_node) {
3147 mp->phy = of_phy_connect(mp->dev, pd->phy_node,
3148 mv643xx_eth_adjust_link, 0,
3149 get_phy_mode(mp));
3150 if (!mp->phy)
3151 err = -ENODEV;
3152 else
3153 phy_addr_set(mp, mp->phy->mdio.addr);
3154 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) {
3155 mp->phy = phy_scan(mp, pd->phy_addr);
3156
3157 if (IS_ERR(mp->phy))
3158 err = PTR_ERR(mp->phy);
3159 else
3160 phy_init(mp, pd->speed, pd->duplex);
3161 }
3162 if (err == -ENODEV) {
3163 err = -EPROBE_DEFER;
3164 goto out;
3165 }
3166 if (err)
3167 goto out;
3168
3169 dev->ethtool_ops = &mv643xx_eth_ethtool_ops;
3170
3171 init_pscr(mp, pd->speed, pd->duplex);
3172
3173
3174 mib_counters_clear(mp);
3175
3176 setup_timer(&mp->mib_counters_timer, mib_counters_timer_wrapper,
3177 (unsigned long)mp);
3178 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
3179
3180 spin_lock_init(&mp->mib_counters_lock);
3181
3182 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
3183
3184 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT);
3185
3186 setup_timer(&mp->rx_oom, oom_timer_wrapper, (unsigned long)mp);
3187
3188
3189 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
3190 BUG_ON(!res);
3191 dev->irq = res->start;
3192
3193 dev->netdev_ops = &mv643xx_eth_netdev_ops;
3194
3195 dev->watchdog_timeo = 2 * HZ;
3196 dev->base_addr = 0;
3197
3198 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
3199 dev->vlan_features = dev->features;
3200
3201 dev->features |= NETIF_F_RXCSUM;
3202 dev->hw_features = dev->features;
3203
3204 dev->priv_flags |= IFF_UNICAST_FLT;
3205 dev->gso_max_segs = MV643XX_MAX_TSO_SEGS;
3206
3207 if (mp->shared->win_protect)
3208 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
3209
3210 netif_carrier_off(dev);
3211
3212 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
3213
3214 set_rx_coal(mp, 250);
3215 set_tx_coal(mp, 0);
3216
3217 err = register_netdev(dev);
3218 if (err)
3219 goto out;
3220
3221 netdev_notice(dev, "port %d with MAC address %pM\n",
3222 mp->port_num, dev->dev_addr);
3223
3224 if (mp->tx_desc_sram_size > 0)
3225 netdev_notice(dev, "configured with sram\n");
3226
3227 return 0;
3228
3229 out:
3230 if (!IS_ERR(mp->clk))
3231 clk_disable_unprepare(mp->clk);
3232 free_netdev(dev);
3233
3234 return err;
3235 }
3236
3237 static int mv643xx_eth_remove(struct platform_device *pdev)
3238 {
3239 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3240
3241 unregister_netdev(mp->dev);
3242 if (mp->phy != NULL)
3243 phy_disconnect(mp->phy);
3244 cancel_work_sync(&mp->tx_timeout_task);
3245
3246 if (!IS_ERR(mp->clk))
3247 clk_disable_unprepare(mp->clk);
3248
3249 free_netdev(mp->dev);
3250
3251 return 0;
3252 }
3253
3254 static void mv643xx_eth_shutdown(struct platform_device *pdev)
3255 {
3256 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3257
3258 /* Mask all interrupts on ethernet port */
3259 wrlp(mp, INT_MASK, 0);
3260 rdlp(mp, INT_MASK);
3261
3262 if (netif_running(mp->dev))
3263 port_reset(mp);
3264 }
3265
3266 static struct platform_driver mv643xx_eth_driver = {
3267 .probe = mv643xx_eth_probe,
3268 .remove = mv643xx_eth_remove,
3269 .shutdown = mv643xx_eth_shutdown,
3270 .driver = {
3271 .name = MV643XX_ETH_NAME,
3272 },
3273 };
3274
3275 static struct platform_driver * const drivers[] = {
3276 &mv643xx_eth_shared_driver,
3277 &mv643xx_eth_driver,
3278 };
3279
3280 static int __init mv643xx_eth_init_module(void)
3281 {
3282 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
3283 }
3284 module_init(mv643xx_eth_init_module);
3285
3286 static void __exit mv643xx_eth_cleanup_module(void)
3287 {
3288 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
3289 }
3290 module_exit(mv643xx_eth_cleanup_module);
3291
3292 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3293 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3294 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3295 MODULE_LICENSE("GPL");
3296 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3297 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux with added FPC-III support