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Merge branch 'topic/asoc' into for-linus
[deliverable/linux.git] / drivers / net / mv643xx_eth.c
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 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License
25 * as published by the Free Software Foundation; either version 2
26 * of the License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 * GNU General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public License
34 * along with this program; if not, write to the Free Software
35 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 */
37
38 #include <linux/init.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/in.h>
41 #include <linux/ip.h>
42 #include <linux/tcp.h>
43 #include <linux/udp.h>
44 #include <linux/etherdevice.h>
45 #include <linux/delay.h>
46 #include <linux/ethtool.h>
47 #include <linux/platform_device.h>
48 #include <linux/module.h>
49 #include <linux/kernel.h>
50 #include <linux/spinlock.h>
51 #include <linux/workqueue.h>
52 #include <linux/phy.h>
53 #include <linux/mv643xx_eth.h>
54 #include <linux/io.h>
55 #include <linux/types.h>
56 #include <linux/inet_lro.h>
57 #include <linux/slab.h>
58 #include <asm/system.h>
59
60 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
61 static char mv643xx_eth_driver_version[] = "1.4";
62
63
64 /*
65 * Registers shared between all ports.
66 */
67 #define PHY_ADDR 0x0000
68 #define SMI_REG 0x0004
69 #define SMI_BUSY 0x10000000
70 #define SMI_READ_VALID 0x08000000
71 #define SMI_OPCODE_READ 0x04000000
72 #define SMI_OPCODE_WRITE 0x00000000
73 #define ERR_INT_CAUSE 0x0080
74 #define ERR_INT_SMI_DONE 0x00000010
75 #define ERR_INT_MASK 0x0084
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 TX_BW_RATE 0x0050
123 #define TX_BW_MTU 0x0058
124 #define TX_BW_BURST 0x005c
125 #define INT_CAUSE 0x0060
126 #define INT_TX_END 0x07f80000
127 #define INT_TX_END_0 0x00080000
128 #define INT_RX 0x000003fc
129 #define INT_RX_0 0x00000004
130 #define INT_EXT 0x00000002
131 #define INT_CAUSE_EXT 0x0064
132 #define INT_EXT_LINK_PHY 0x00110000
133 #define INT_EXT_TX 0x000000ff
134 #define INT_MASK 0x0068
135 #define INT_MASK_EXT 0x006c
136 #define TX_FIFO_URGENT_THRESHOLD 0x0074
137 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
138 #define TX_BW_RATE_MOVED 0x00e0
139 #define TX_BW_MTU_MOVED 0x00e8
140 #define TX_BW_BURST_MOVED 0x00ec
141 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
142 #define RXQ_COMMAND 0x0280
143 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
144 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
145 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
146 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
147
148 /*
149 * Misc per-port registers.
150 */
151 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
152 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
153 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
154 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
155
156
157 /*
158 * SDMA configuration register default value.
159 */
160 #if defined(__BIG_ENDIAN)
161 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
162 (RX_BURST_SIZE_4_64BIT | \
163 TX_BURST_SIZE_4_64BIT)
164 #elif defined(__LITTLE_ENDIAN)
165 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
166 (RX_BURST_SIZE_4_64BIT | \
167 BLM_RX_NO_SWAP | \
168 BLM_TX_NO_SWAP | \
169 TX_BURST_SIZE_4_64BIT)
170 #else
171 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
172 #endif
173
174
175 /*
176 * Misc definitions.
177 */
178 #define DEFAULT_RX_QUEUE_SIZE 128
179 #define DEFAULT_TX_QUEUE_SIZE 256
180 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
181
182
183 /*
184 * RX/TX descriptors.
185 */
186 #if defined(__BIG_ENDIAN)
187 struct rx_desc {
188 u16 byte_cnt; /* Descriptor buffer byte count */
189 u16 buf_size; /* Buffer size */
190 u32 cmd_sts; /* Descriptor command status */
191 u32 next_desc_ptr; /* Next descriptor pointer */
192 u32 buf_ptr; /* Descriptor buffer pointer */
193 };
194
195 struct tx_desc {
196 u16 byte_cnt; /* buffer byte count */
197 u16 l4i_chk; /* CPU provided TCP checksum */
198 u32 cmd_sts; /* Command/status field */
199 u32 next_desc_ptr; /* Pointer to next descriptor */
200 u32 buf_ptr; /* pointer to buffer for this descriptor*/
201 };
202 #elif defined(__LITTLE_ENDIAN)
203 struct rx_desc {
204 u32 cmd_sts; /* Descriptor command status */
205 u16 buf_size; /* Buffer size */
206 u16 byte_cnt; /* Descriptor buffer byte count */
207 u32 buf_ptr; /* Descriptor buffer pointer */
208 u32 next_desc_ptr; /* Next descriptor pointer */
209 };
210
211 struct tx_desc {
212 u32 cmd_sts; /* Command/status field */
213 u16 l4i_chk; /* CPU provided TCP checksum */
214 u16 byte_cnt; /* buffer byte count */
215 u32 buf_ptr; /* pointer to buffer for this descriptor*/
216 u32 next_desc_ptr; /* Pointer to next descriptor */
217 };
218 #else
219 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
220 #endif
221
222 /* RX & TX descriptor command */
223 #define BUFFER_OWNED_BY_DMA 0x80000000
224
225 /* RX & TX descriptor status */
226 #define ERROR_SUMMARY 0x00000001
227
228 /* RX descriptor status */
229 #define LAYER_4_CHECKSUM_OK 0x40000000
230 #define RX_ENABLE_INTERRUPT 0x20000000
231 #define RX_FIRST_DESC 0x08000000
232 #define RX_LAST_DESC 0x04000000
233 #define RX_IP_HDR_OK 0x02000000
234 #define RX_PKT_IS_IPV4 0x01000000
235 #define RX_PKT_IS_ETHERNETV2 0x00800000
236 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
237 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
238 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
239
240 /* TX descriptor command */
241 #define TX_ENABLE_INTERRUPT 0x00800000
242 #define GEN_CRC 0x00400000
243 #define TX_FIRST_DESC 0x00200000
244 #define TX_LAST_DESC 0x00100000
245 #define ZERO_PADDING 0x00080000
246 #define GEN_IP_V4_CHECKSUM 0x00040000
247 #define GEN_TCP_UDP_CHECKSUM 0x00020000
248 #define UDP_FRAME 0x00010000
249 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
250 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
251
252 #define TX_IHL_SHIFT 11
253
254
255 /* global *******************************************************************/
256 struct mv643xx_eth_shared_private {
257 /*
258 * Ethernet controller base address.
259 */
260 void __iomem *base;
261
262 /*
263 * Points at the right SMI instance to use.
264 */
265 struct mv643xx_eth_shared_private *smi;
266
267 /*
268 * Provides access to local SMI interface.
269 */
270 struct mii_bus *smi_bus;
271
272 /*
273 * If we have access to the error interrupt pin (which is
274 * somewhat misnamed as it not only reflects internal errors
275 * but also reflects SMI completion), use that to wait for
276 * SMI access completion instead of polling the SMI busy bit.
277 */
278 int err_interrupt;
279 wait_queue_head_t smi_busy_wait;
280
281 /*
282 * Per-port MBUS window access register value.
283 */
284 u32 win_protect;
285
286 /*
287 * Hardware-specific parameters.
288 */
289 unsigned int t_clk;
290 int extended_rx_coal_limit;
291 int tx_bw_control;
292 };
293
294 #define TX_BW_CONTROL_ABSENT 0
295 #define TX_BW_CONTROL_OLD_LAYOUT 1
296 #define TX_BW_CONTROL_NEW_LAYOUT 2
297
298 static int mv643xx_eth_open(struct net_device *dev);
299 static int mv643xx_eth_stop(struct net_device *dev);
300
301
302 /* per-port *****************************************************************/
303 struct mib_counters {
304 u64 good_octets_received;
305 u32 bad_octets_received;
306 u32 internal_mac_transmit_err;
307 u32 good_frames_received;
308 u32 bad_frames_received;
309 u32 broadcast_frames_received;
310 u32 multicast_frames_received;
311 u32 frames_64_octets;
312 u32 frames_65_to_127_octets;
313 u32 frames_128_to_255_octets;
314 u32 frames_256_to_511_octets;
315 u32 frames_512_to_1023_octets;
316 u32 frames_1024_to_max_octets;
317 u64 good_octets_sent;
318 u32 good_frames_sent;
319 u32 excessive_collision;
320 u32 multicast_frames_sent;
321 u32 broadcast_frames_sent;
322 u32 unrec_mac_control_received;
323 u32 fc_sent;
324 u32 good_fc_received;
325 u32 bad_fc_received;
326 u32 undersize_received;
327 u32 fragments_received;
328 u32 oversize_received;
329 u32 jabber_received;
330 u32 mac_receive_error;
331 u32 bad_crc_event;
332 u32 collision;
333 u32 late_collision;
334 };
335
336 struct lro_counters {
337 u32 lro_aggregated;
338 u32 lro_flushed;
339 u32 lro_no_desc;
340 };
341
342 struct rx_queue {
343 int index;
344
345 int rx_ring_size;
346
347 int rx_desc_count;
348 int rx_curr_desc;
349 int rx_used_desc;
350
351 struct rx_desc *rx_desc_area;
352 dma_addr_t rx_desc_dma;
353 int rx_desc_area_size;
354 struct sk_buff **rx_skb;
355
356 struct net_lro_mgr lro_mgr;
357 struct net_lro_desc lro_arr[8];
358 };
359
360 struct tx_queue {
361 int index;
362
363 int tx_ring_size;
364
365 int tx_desc_count;
366 int tx_curr_desc;
367 int tx_used_desc;
368
369 struct tx_desc *tx_desc_area;
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 lro_counters lro_counters;
394
395 struct work_struct tx_timeout_task;
396
397 struct napi_struct napi;
398 u32 int_mask;
399 u8 oom;
400 u8 work_link;
401 u8 work_tx;
402 u8 work_tx_end;
403 u8 work_rx;
404 u8 work_rx_refill;
405
406 int skb_size;
407 struct sk_buff_head rx_recycle;
408
409 /*
410 * RX state.
411 */
412 int rx_ring_size;
413 unsigned long rx_desc_sram_addr;
414 int rx_desc_sram_size;
415 int rxq_count;
416 struct timer_list rx_oom;
417 struct rx_queue rxq[8];
418
419 /*
420 * TX state.
421 */
422 int tx_ring_size;
423 unsigned long tx_desc_sram_addr;
424 int tx_desc_sram_size;
425 int txq_count;
426 struct tx_queue txq[8];
427 };
428
429
430 /* port register accessors **************************************************/
431 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
432 {
433 return readl(mp->shared->base + offset);
434 }
435
436 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
437 {
438 return readl(mp->base + offset);
439 }
440
441 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
442 {
443 writel(data, mp->shared->base + offset);
444 }
445
446 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
447 {
448 writel(data, mp->base + offset);
449 }
450
451
452 /* rxq/txq helper functions *************************************************/
453 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
454 {
455 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
456 }
457
458 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
459 {
460 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
461 }
462
463 static void rxq_enable(struct rx_queue *rxq)
464 {
465 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
466 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
467 }
468
469 static void rxq_disable(struct rx_queue *rxq)
470 {
471 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
472 u8 mask = 1 << rxq->index;
473
474 wrlp(mp, RXQ_COMMAND, mask << 8);
475 while (rdlp(mp, RXQ_COMMAND) & mask)
476 udelay(10);
477 }
478
479 static void txq_reset_hw_ptr(struct tx_queue *txq)
480 {
481 struct mv643xx_eth_private *mp = txq_to_mp(txq);
482 u32 addr;
483
484 addr = (u32)txq->tx_desc_dma;
485 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
486 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
487 }
488
489 static void txq_enable(struct tx_queue *txq)
490 {
491 struct mv643xx_eth_private *mp = txq_to_mp(txq);
492 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
493 }
494
495 static void txq_disable(struct tx_queue *txq)
496 {
497 struct mv643xx_eth_private *mp = txq_to_mp(txq);
498 u8 mask = 1 << txq->index;
499
500 wrlp(mp, TXQ_COMMAND, mask << 8);
501 while (rdlp(mp, TXQ_COMMAND) & mask)
502 udelay(10);
503 }
504
505 static void txq_maybe_wake(struct tx_queue *txq)
506 {
507 struct mv643xx_eth_private *mp = txq_to_mp(txq);
508 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
509
510 if (netif_tx_queue_stopped(nq)) {
511 __netif_tx_lock(nq, smp_processor_id());
512 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1)
513 netif_tx_wake_queue(nq);
514 __netif_tx_unlock(nq);
515 }
516 }
517
518
519 /* rx napi ******************************************************************/
520 static int
521 mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph,
522 u64 *hdr_flags, void *priv)
523 {
524 unsigned long cmd_sts = (unsigned long)priv;
525
526 /*
527 * Make sure that this packet is Ethernet II, is not VLAN
528 * tagged, is IPv4, has a valid IP header, and is TCP.
529 */
530 if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
531 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK |
532 RX_PKT_IS_VLAN_TAGGED)) !=
533 (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
534 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4))
535 return -1;
536
537 skb_reset_network_header(skb);
538 skb_set_transport_header(skb, ip_hdrlen(skb));
539 *iphdr = ip_hdr(skb);
540 *tcph = tcp_hdr(skb);
541 *hdr_flags = LRO_IPV4 | LRO_TCP;
542
543 return 0;
544 }
545
546 static int rxq_process(struct rx_queue *rxq, int budget)
547 {
548 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
549 struct net_device_stats *stats = &mp->dev->stats;
550 int lro_flush_needed;
551 int rx;
552
553 lro_flush_needed = 0;
554 rx = 0;
555 while (rx < budget && rxq->rx_desc_count) {
556 struct rx_desc *rx_desc;
557 unsigned int cmd_sts;
558 struct sk_buff *skb;
559 u16 byte_cnt;
560
561 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
562
563 cmd_sts = rx_desc->cmd_sts;
564 if (cmd_sts & BUFFER_OWNED_BY_DMA)
565 break;
566 rmb();
567
568 skb = rxq->rx_skb[rxq->rx_curr_desc];
569 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
570
571 rxq->rx_curr_desc++;
572 if (rxq->rx_curr_desc == rxq->rx_ring_size)
573 rxq->rx_curr_desc = 0;
574
575 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
576 rx_desc->buf_size, DMA_FROM_DEVICE);
577 rxq->rx_desc_count--;
578 rx++;
579
580 mp->work_rx_refill |= 1 << rxq->index;
581
582 byte_cnt = rx_desc->byte_cnt;
583
584 /*
585 * Update statistics.
586 *
587 * Note that the descriptor byte count includes 2 dummy
588 * bytes automatically inserted by the hardware at the
589 * start of the packet (which we don't count), and a 4
590 * byte CRC at the end of the packet (which we do count).
591 */
592 stats->rx_packets++;
593 stats->rx_bytes += byte_cnt - 2;
594
595 /*
596 * In case we received a packet without first / last bits
597 * on, or the error summary bit is set, the packet needs
598 * to be dropped.
599 */
600 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
601 != (RX_FIRST_DESC | RX_LAST_DESC))
602 goto err;
603
604 /*
605 * The -4 is for the CRC in the trailer of the
606 * received packet
607 */
608 skb_put(skb, byte_cnt - 2 - 4);
609
610 if (cmd_sts & LAYER_4_CHECKSUM_OK)
611 skb->ip_summed = CHECKSUM_UNNECESSARY;
612 skb->protocol = eth_type_trans(skb, mp->dev);
613
614 if (skb->dev->features & NETIF_F_LRO &&
615 skb->ip_summed == CHECKSUM_UNNECESSARY) {
616 lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts);
617 lro_flush_needed = 1;
618 } else
619 netif_receive_skb(skb);
620
621 continue;
622
623 err:
624 stats->rx_dropped++;
625
626 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
627 (RX_FIRST_DESC | RX_LAST_DESC)) {
628 if (net_ratelimit())
629 dev_printk(KERN_ERR, &mp->dev->dev,
630 "received packet spanning "
631 "multiple descriptors\n");
632 }
633
634 if (cmd_sts & ERROR_SUMMARY)
635 stats->rx_errors++;
636
637 dev_kfree_skb(skb);
638 }
639
640 if (lro_flush_needed)
641 lro_flush_all(&rxq->lro_mgr);
642
643 if (rx < budget)
644 mp->work_rx &= ~(1 << rxq->index);
645
646 return rx;
647 }
648
649 static int rxq_refill(struct rx_queue *rxq, int budget)
650 {
651 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
652 int refilled;
653
654 refilled = 0;
655 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
656 struct sk_buff *skb;
657 int rx;
658 struct rx_desc *rx_desc;
659 int size;
660
661 skb = __skb_dequeue(&mp->rx_recycle);
662 if (skb == NULL)
663 skb = dev_alloc_skb(mp->skb_size);
664
665 if (skb == NULL) {
666 mp->oom = 1;
667 goto oom;
668 }
669
670 if (SKB_DMA_REALIGN)
671 skb_reserve(skb, SKB_DMA_REALIGN);
672
673 refilled++;
674 rxq->rx_desc_count++;
675
676 rx = rxq->rx_used_desc++;
677 if (rxq->rx_used_desc == rxq->rx_ring_size)
678 rxq->rx_used_desc = 0;
679
680 rx_desc = rxq->rx_desc_area + rx;
681
682 size = skb->end - skb->data;
683 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent,
684 skb->data, size,
685 DMA_FROM_DEVICE);
686 rx_desc->buf_size = size;
687 rxq->rx_skb[rx] = skb;
688 wmb();
689 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
690 wmb();
691
692 /*
693 * The hardware automatically prepends 2 bytes of
694 * dummy data to each received packet, so that the
695 * IP header ends up 16-byte aligned.
696 */
697 skb_reserve(skb, 2);
698 }
699
700 if (refilled < budget)
701 mp->work_rx_refill &= ~(1 << rxq->index);
702
703 oom:
704 return refilled;
705 }
706
707
708 /* tx ***********************************************************************/
709 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
710 {
711 int frag;
712
713 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
714 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
715 if (fragp->size <= 8 && fragp->page_offset & 7)
716 return 1;
717 }
718
719 return 0;
720 }
721
722 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
723 {
724 struct mv643xx_eth_private *mp = txq_to_mp(txq);
725 int nr_frags = skb_shinfo(skb)->nr_frags;
726 int frag;
727
728 for (frag = 0; frag < nr_frags; frag++) {
729 skb_frag_t *this_frag;
730 int tx_index;
731 struct tx_desc *desc;
732
733 this_frag = &skb_shinfo(skb)->frags[frag];
734 tx_index = txq->tx_curr_desc++;
735 if (txq->tx_curr_desc == txq->tx_ring_size)
736 txq->tx_curr_desc = 0;
737 desc = &txq->tx_desc_area[tx_index];
738
739 /*
740 * The last fragment will generate an interrupt
741 * which will free the skb on TX completion.
742 */
743 if (frag == nr_frags - 1) {
744 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
745 ZERO_PADDING | TX_LAST_DESC |
746 TX_ENABLE_INTERRUPT;
747 } else {
748 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
749 }
750
751 desc->l4i_chk = 0;
752 desc->byte_cnt = this_frag->size;
753 desc->buf_ptr = dma_map_page(mp->dev->dev.parent,
754 this_frag->page,
755 this_frag->page_offset,
756 this_frag->size, DMA_TO_DEVICE);
757 }
758 }
759
760 static inline __be16 sum16_as_be(__sum16 sum)
761 {
762 return (__force __be16)sum;
763 }
764
765 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
766 {
767 struct mv643xx_eth_private *mp = txq_to_mp(txq);
768 int nr_frags = skb_shinfo(skb)->nr_frags;
769 int tx_index;
770 struct tx_desc *desc;
771 u32 cmd_sts;
772 u16 l4i_chk;
773 int length;
774
775 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
776 l4i_chk = 0;
777
778 if (skb->ip_summed == CHECKSUM_PARTIAL) {
779 int tag_bytes;
780
781 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
782 skb->protocol != htons(ETH_P_8021Q));
783
784 tag_bytes = (void *)ip_hdr(skb) - (void *)skb->data - ETH_HLEN;
785 if (unlikely(tag_bytes & ~12)) {
786 if (skb_checksum_help(skb) == 0)
787 goto no_csum;
788 kfree_skb(skb);
789 return 1;
790 }
791
792 if (tag_bytes & 4)
793 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
794 if (tag_bytes & 8)
795 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
796
797 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
798 GEN_IP_V4_CHECKSUM |
799 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
800
801 switch (ip_hdr(skb)->protocol) {
802 case IPPROTO_UDP:
803 cmd_sts |= UDP_FRAME;
804 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
805 break;
806 case IPPROTO_TCP:
807 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
808 break;
809 default:
810 BUG();
811 }
812 } else {
813 no_csum:
814 /* Errata BTS #50, IHL must be 5 if no HW checksum */
815 cmd_sts |= 5 << TX_IHL_SHIFT;
816 }
817
818 tx_index = txq->tx_curr_desc++;
819 if (txq->tx_curr_desc == txq->tx_ring_size)
820 txq->tx_curr_desc = 0;
821 desc = &txq->tx_desc_area[tx_index];
822
823 if (nr_frags) {
824 txq_submit_frag_skb(txq, skb);
825 length = skb_headlen(skb);
826 } else {
827 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
828 length = skb->len;
829 }
830
831 desc->l4i_chk = l4i_chk;
832 desc->byte_cnt = length;
833 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
834 length, DMA_TO_DEVICE);
835
836 __skb_queue_tail(&txq->tx_skb, skb);
837
838 /* ensure all other descriptors are written before first cmd_sts */
839 wmb();
840 desc->cmd_sts = cmd_sts;
841
842 /* clear TX_END status */
843 mp->work_tx_end &= ~(1 << txq->index);
844
845 /* ensure all descriptors are written before poking hardware */
846 wmb();
847 txq_enable(txq);
848
849 txq->tx_desc_count += nr_frags + 1;
850
851 return 0;
852 }
853
854 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
855 {
856 struct mv643xx_eth_private *mp = netdev_priv(dev);
857 int queue;
858 struct tx_queue *txq;
859 struct netdev_queue *nq;
860
861 queue = skb_get_queue_mapping(skb);
862 txq = mp->txq + queue;
863 nq = netdev_get_tx_queue(dev, queue);
864
865 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
866 txq->tx_dropped++;
867 dev_printk(KERN_DEBUG, &dev->dev,
868 "failed to linearize skb with tiny "
869 "unaligned fragment\n");
870 return NETDEV_TX_BUSY;
871 }
872
873 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
874 if (net_ratelimit())
875 dev_printk(KERN_ERR, &dev->dev, "tx queue full?!\n");
876 kfree_skb(skb);
877 return NETDEV_TX_OK;
878 }
879
880 if (!txq_submit_skb(txq, skb)) {
881 int entries_left;
882
883 txq->tx_bytes += skb->len;
884 txq->tx_packets++;
885 dev->trans_start = jiffies;
886
887 entries_left = txq->tx_ring_size - txq->tx_desc_count;
888 if (entries_left < MAX_SKB_FRAGS + 1)
889 netif_tx_stop_queue(nq);
890 }
891
892 return NETDEV_TX_OK;
893 }
894
895
896 /* tx napi ******************************************************************/
897 static void txq_kick(struct tx_queue *txq)
898 {
899 struct mv643xx_eth_private *mp = txq_to_mp(txq);
900 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
901 u32 hw_desc_ptr;
902 u32 expected_ptr;
903
904 __netif_tx_lock(nq, smp_processor_id());
905
906 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
907 goto out;
908
909 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
910 expected_ptr = (u32)txq->tx_desc_dma +
911 txq->tx_curr_desc * sizeof(struct tx_desc);
912
913 if (hw_desc_ptr != expected_ptr)
914 txq_enable(txq);
915
916 out:
917 __netif_tx_unlock(nq);
918
919 mp->work_tx_end &= ~(1 << txq->index);
920 }
921
922 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
923 {
924 struct mv643xx_eth_private *mp = txq_to_mp(txq);
925 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
926 int reclaimed;
927
928 __netif_tx_lock(nq, smp_processor_id());
929
930 reclaimed = 0;
931 while (reclaimed < budget && txq->tx_desc_count > 0) {
932 int tx_index;
933 struct tx_desc *desc;
934 u32 cmd_sts;
935 struct sk_buff *skb;
936
937 tx_index = txq->tx_used_desc;
938 desc = &txq->tx_desc_area[tx_index];
939 cmd_sts = desc->cmd_sts;
940
941 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
942 if (!force)
943 break;
944 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
945 }
946
947 txq->tx_used_desc = tx_index + 1;
948 if (txq->tx_used_desc == txq->tx_ring_size)
949 txq->tx_used_desc = 0;
950
951 reclaimed++;
952 txq->tx_desc_count--;
953
954 skb = NULL;
955 if (cmd_sts & TX_LAST_DESC)
956 skb = __skb_dequeue(&txq->tx_skb);
957
958 if (cmd_sts & ERROR_SUMMARY) {
959 dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n");
960 mp->dev->stats.tx_errors++;
961 }
962
963 if (cmd_sts & TX_FIRST_DESC) {
964 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
965 desc->byte_cnt, DMA_TO_DEVICE);
966 } else {
967 dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr,
968 desc->byte_cnt, DMA_TO_DEVICE);
969 }
970
971 if (skb != NULL) {
972 if (skb_queue_len(&mp->rx_recycle) <
973 mp->rx_ring_size &&
974 skb_recycle_check(skb, mp->skb_size))
975 __skb_queue_head(&mp->rx_recycle, skb);
976 else
977 dev_kfree_skb(skb);
978 }
979 }
980
981 __netif_tx_unlock(nq);
982
983 if (reclaimed < budget)
984 mp->work_tx &= ~(1 << txq->index);
985
986 return reclaimed;
987 }
988
989
990 /* tx rate control **********************************************************/
991 /*
992 * Set total maximum TX rate (shared by all TX queues for this port)
993 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
994 */
995 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
996 {
997 int token_rate;
998 int mtu;
999 int bucket_size;
1000
1001 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1002 if (token_rate > 1023)
1003 token_rate = 1023;
1004
1005 mtu = (mp->dev->mtu + 255) >> 8;
1006 if (mtu > 63)
1007 mtu = 63;
1008
1009 bucket_size = (burst + 255) >> 8;
1010 if (bucket_size > 65535)
1011 bucket_size = 65535;
1012
1013 switch (mp->shared->tx_bw_control) {
1014 case TX_BW_CONTROL_OLD_LAYOUT:
1015 wrlp(mp, TX_BW_RATE, token_rate);
1016 wrlp(mp, TX_BW_MTU, mtu);
1017 wrlp(mp, TX_BW_BURST, bucket_size);
1018 break;
1019 case TX_BW_CONTROL_NEW_LAYOUT:
1020 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1021 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1022 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1023 break;
1024 }
1025 }
1026
1027 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1028 {
1029 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1030 int token_rate;
1031 int bucket_size;
1032
1033 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1034 if (token_rate > 1023)
1035 token_rate = 1023;
1036
1037 bucket_size = (burst + 255) >> 8;
1038 if (bucket_size > 65535)
1039 bucket_size = 65535;
1040
1041 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1042 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1043 }
1044
1045 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1046 {
1047 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1048 int off;
1049 u32 val;
1050
1051 /*
1052 * Turn on fixed priority mode.
1053 */
1054 off = 0;
1055 switch (mp->shared->tx_bw_control) {
1056 case TX_BW_CONTROL_OLD_LAYOUT:
1057 off = TXQ_FIX_PRIO_CONF;
1058 break;
1059 case TX_BW_CONTROL_NEW_LAYOUT:
1060 off = TXQ_FIX_PRIO_CONF_MOVED;
1061 break;
1062 }
1063
1064 if (off) {
1065 val = rdlp(mp, off);
1066 val |= 1 << txq->index;
1067 wrlp(mp, off, val);
1068 }
1069 }
1070
1071
1072 /* mii management interface *************************************************/
1073 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1074 {
1075 struct mv643xx_eth_shared_private *msp = dev_id;
1076
1077 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1078 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1079 wake_up(&msp->smi_busy_wait);
1080 return IRQ_HANDLED;
1081 }
1082
1083 return IRQ_NONE;
1084 }
1085
1086 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1087 {
1088 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1089 }
1090
1091 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1092 {
1093 if (msp->err_interrupt == NO_IRQ) {
1094 int i;
1095
1096 for (i = 0; !smi_is_done(msp); i++) {
1097 if (i == 10)
1098 return -ETIMEDOUT;
1099 msleep(10);
1100 }
1101
1102 return 0;
1103 }
1104
1105 if (!smi_is_done(msp)) {
1106 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1107 msecs_to_jiffies(100));
1108 if (!smi_is_done(msp))
1109 return -ETIMEDOUT;
1110 }
1111
1112 return 0;
1113 }
1114
1115 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1116 {
1117 struct mv643xx_eth_shared_private *msp = bus->priv;
1118 void __iomem *smi_reg = msp->base + SMI_REG;
1119 int ret;
1120
1121 if (smi_wait_ready(msp)) {
1122 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1123 return -ETIMEDOUT;
1124 }
1125
1126 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
1127
1128 if (smi_wait_ready(msp)) {
1129 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1130 return -ETIMEDOUT;
1131 }
1132
1133 ret = readl(smi_reg);
1134 if (!(ret & SMI_READ_VALID)) {
1135 printk(KERN_WARNING "mv643xx_eth: SMI bus read not valid\n");
1136 return -ENODEV;
1137 }
1138
1139 return ret & 0xffff;
1140 }
1141
1142 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1143 {
1144 struct mv643xx_eth_shared_private *msp = bus->priv;
1145 void __iomem *smi_reg = msp->base + SMI_REG;
1146
1147 if (smi_wait_ready(msp)) {
1148 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1149 return -ETIMEDOUT;
1150 }
1151
1152 writel(SMI_OPCODE_WRITE | (reg << 21) |
1153 (addr << 16) | (val & 0xffff), smi_reg);
1154
1155 if (smi_wait_ready(msp)) {
1156 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1157 return -ETIMEDOUT;
1158 }
1159
1160 return 0;
1161 }
1162
1163
1164 /* statistics ***************************************************************/
1165 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1166 {
1167 struct mv643xx_eth_private *mp = netdev_priv(dev);
1168 struct net_device_stats *stats = &dev->stats;
1169 unsigned long tx_packets = 0;
1170 unsigned long tx_bytes = 0;
1171 unsigned long tx_dropped = 0;
1172 int i;
1173
1174 for (i = 0; i < mp->txq_count; i++) {
1175 struct tx_queue *txq = mp->txq + i;
1176
1177 tx_packets += txq->tx_packets;
1178 tx_bytes += txq->tx_bytes;
1179 tx_dropped += txq->tx_dropped;
1180 }
1181
1182 stats->tx_packets = tx_packets;
1183 stats->tx_bytes = tx_bytes;
1184 stats->tx_dropped = tx_dropped;
1185
1186 return stats;
1187 }
1188
1189 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1190 {
1191 u32 lro_aggregated = 0;
1192 u32 lro_flushed = 0;
1193 u32 lro_no_desc = 0;
1194 int i;
1195
1196 for (i = 0; i < mp->rxq_count; i++) {
1197 struct rx_queue *rxq = mp->rxq + i;
1198
1199 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1200 lro_flushed += rxq->lro_mgr.stats.flushed;
1201 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1202 }
1203
1204 mp->lro_counters.lro_aggregated = lro_aggregated;
1205 mp->lro_counters.lro_flushed = lro_flushed;
1206 mp->lro_counters.lro_no_desc = lro_no_desc;
1207 }
1208
1209 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1210 {
1211 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1212 }
1213
1214 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1215 {
1216 int i;
1217
1218 for (i = 0; i < 0x80; i += 4)
1219 mib_read(mp, i);
1220 }
1221
1222 static void mib_counters_update(struct mv643xx_eth_private *mp)
1223 {
1224 struct mib_counters *p = &mp->mib_counters;
1225
1226 spin_lock_bh(&mp->mib_counters_lock);
1227 p->good_octets_received += mib_read(mp, 0x00);
1228 p->bad_octets_received += mib_read(mp, 0x08);
1229 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1230 p->good_frames_received += mib_read(mp, 0x10);
1231 p->bad_frames_received += mib_read(mp, 0x14);
1232 p->broadcast_frames_received += mib_read(mp, 0x18);
1233 p->multicast_frames_received += mib_read(mp, 0x1c);
1234 p->frames_64_octets += mib_read(mp, 0x20);
1235 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1236 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1237 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1238 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1239 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1240 p->good_octets_sent += mib_read(mp, 0x38);
1241 p->good_frames_sent += mib_read(mp, 0x40);
1242 p->excessive_collision += mib_read(mp, 0x44);
1243 p->multicast_frames_sent += mib_read(mp, 0x48);
1244 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1245 p->unrec_mac_control_received += mib_read(mp, 0x50);
1246 p->fc_sent += mib_read(mp, 0x54);
1247 p->good_fc_received += mib_read(mp, 0x58);
1248 p->bad_fc_received += mib_read(mp, 0x5c);
1249 p->undersize_received += mib_read(mp, 0x60);
1250 p->fragments_received += mib_read(mp, 0x64);
1251 p->oversize_received += mib_read(mp, 0x68);
1252 p->jabber_received += mib_read(mp, 0x6c);
1253 p->mac_receive_error += mib_read(mp, 0x70);
1254 p->bad_crc_event += mib_read(mp, 0x74);
1255 p->collision += mib_read(mp, 0x78);
1256 p->late_collision += mib_read(mp, 0x7c);
1257 spin_unlock_bh(&mp->mib_counters_lock);
1258
1259 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1260 }
1261
1262 static void mib_counters_timer_wrapper(unsigned long _mp)
1263 {
1264 struct mv643xx_eth_private *mp = (void *)_mp;
1265
1266 mib_counters_update(mp);
1267 }
1268
1269
1270 /* interrupt coalescing *****************************************************/
1271 /*
1272 * Hardware coalescing parameters are set in units of 64 t_clk
1273 * cycles. I.e.:
1274 *
1275 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1276 *
1277 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1278 *
1279 * In the ->set*() methods, we round the computed register value
1280 * to the nearest integer.
1281 */
1282 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1283 {
1284 u32 val = rdlp(mp, SDMA_CONFIG);
1285 u64 temp;
1286
1287 if (mp->shared->extended_rx_coal_limit)
1288 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1289 else
1290 temp = (val & 0x003fff00) >> 8;
1291
1292 temp *= 64000000;
1293 do_div(temp, mp->shared->t_clk);
1294
1295 return (unsigned int)temp;
1296 }
1297
1298 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1299 {
1300 u64 temp;
1301 u32 val;
1302
1303 temp = (u64)usec * mp->shared->t_clk;
1304 temp += 31999999;
1305 do_div(temp, 64000000);
1306
1307 val = rdlp(mp, SDMA_CONFIG);
1308 if (mp->shared->extended_rx_coal_limit) {
1309 if (temp > 0xffff)
1310 temp = 0xffff;
1311 val &= ~0x023fff80;
1312 val |= (temp & 0x8000) << 10;
1313 val |= (temp & 0x7fff) << 7;
1314 } else {
1315 if (temp > 0x3fff)
1316 temp = 0x3fff;
1317 val &= ~0x003fff00;
1318 val |= (temp & 0x3fff) << 8;
1319 }
1320 wrlp(mp, SDMA_CONFIG, val);
1321 }
1322
1323 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1324 {
1325 u64 temp;
1326
1327 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1328 temp *= 64000000;
1329 do_div(temp, mp->shared->t_clk);
1330
1331 return (unsigned int)temp;
1332 }
1333
1334 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1335 {
1336 u64 temp;
1337
1338 temp = (u64)usec * mp->shared->t_clk;
1339 temp += 31999999;
1340 do_div(temp, 64000000);
1341
1342 if (temp > 0x3fff)
1343 temp = 0x3fff;
1344
1345 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1346 }
1347
1348
1349 /* ethtool ******************************************************************/
1350 struct mv643xx_eth_stats {
1351 char stat_string[ETH_GSTRING_LEN];
1352 int sizeof_stat;
1353 int netdev_off;
1354 int mp_off;
1355 };
1356
1357 #define SSTAT(m) \
1358 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1359 offsetof(struct net_device, stats.m), -1 }
1360
1361 #define MIBSTAT(m) \
1362 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1363 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1364
1365 #define LROSTAT(m) \
1366 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1367 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1368
1369 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1370 SSTAT(rx_packets),
1371 SSTAT(tx_packets),
1372 SSTAT(rx_bytes),
1373 SSTAT(tx_bytes),
1374 SSTAT(rx_errors),
1375 SSTAT(tx_errors),
1376 SSTAT(rx_dropped),
1377 SSTAT(tx_dropped),
1378 MIBSTAT(good_octets_received),
1379 MIBSTAT(bad_octets_received),
1380 MIBSTAT(internal_mac_transmit_err),
1381 MIBSTAT(good_frames_received),
1382 MIBSTAT(bad_frames_received),
1383 MIBSTAT(broadcast_frames_received),
1384 MIBSTAT(multicast_frames_received),
1385 MIBSTAT(frames_64_octets),
1386 MIBSTAT(frames_65_to_127_octets),
1387 MIBSTAT(frames_128_to_255_octets),
1388 MIBSTAT(frames_256_to_511_octets),
1389 MIBSTAT(frames_512_to_1023_octets),
1390 MIBSTAT(frames_1024_to_max_octets),
1391 MIBSTAT(good_octets_sent),
1392 MIBSTAT(good_frames_sent),
1393 MIBSTAT(excessive_collision),
1394 MIBSTAT(multicast_frames_sent),
1395 MIBSTAT(broadcast_frames_sent),
1396 MIBSTAT(unrec_mac_control_received),
1397 MIBSTAT(fc_sent),
1398 MIBSTAT(good_fc_received),
1399 MIBSTAT(bad_fc_received),
1400 MIBSTAT(undersize_received),
1401 MIBSTAT(fragments_received),
1402 MIBSTAT(oversize_received),
1403 MIBSTAT(jabber_received),
1404 MIBSTAT(mac_receive_error),
1405 MIBSTAT(bad_crc_event),
1406 MIBSTAT(collision),
1407 MIBSTAT(late_collision),
1408 LROSTAT(lro_aggregated),
1409 LROSTAT(lro_flushed),
1410 LROSTAT(lro_no_desc),
1411 };
1412
1413 static int
1414 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1415 struct ethtool_cmd *cmd)
1416 {
1417 int err;
1418
1419 err = phy_read_status(mp->phy);
1420 if (err == 0)
1421 err = phy_ethtool_gset(mp->phy, cmd);
1422
1423 /*
1424 * The MAC does not support 1000baseT_Half.
1425 */
1426 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1427 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1428
1429 return err;
1430 }
1431
1432 static int
1433 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1434 struct ethtool_cmd *cmd)
1435 {
1436 u32 port_status;
1437
1438 port_status = rdlp(mp, PORT_STATUS);
1439
1440 cmd->supported = SUPPORTED_MII;
1441 cmd->advertising = ADVERTISED_MII;
1442 switch (port_status & PORT_SPEED_MASK) {
1443 case PORT_SPEED_10:
1444 cmd->speed = SPEED_10;
1445 break;
1446 case PORT_SPEED_100:
1447 cmd->speed = SPEED_100;
1448 break;
1449 case PORT_SPEED_1000:
1450 cmd->speed = SPEED_1000;
1451 break;
1452 default:
1453 cmd->speed = -1;
1454 break;
1455 }
1456 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1457 cmd->port = PORT_MII;
1458 cmd->phy_address = 0;
1459 cmd->transceiver = XCVR_INTERNAL;
1460 cmd->autoneg = AUTONEG_DISABLE;
1461 cmd->maxtxpkt = 1;
1462 cmd->maxrxpkt = 1;
1463
1464 return 0;
1465 }
1466
1467 static int
1468 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1469 {
1470 struct mv643xx_eth_private *mp = netdev_priv(dev);
1471
1472 if (mp->phy != NULL)
1473 return mv643xx_eth_get_settings_phy(mp, cmd);
1474 else
1475 return mv643xx_eth_get_settings_phyless(mp, cmd);
1476 }
1477
1478 static int
1479 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1480 {
1481 struct mv643xx_eth_private *mp = netdev_priv(dev);
1482
1483 if (mp->phy == NULL)
1484 return -EINVAL;
1485
1486 /*
1487 * The MAC does not support 1000baseT_Half.
1488 */
1489 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1490
1491 return phy_ethtool_sset(mp->phy, cmd);
1492 }
1493
1494 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1495 struct ethtool_drvinfo *drvinfo)
1496 {
1497 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1498 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1499 strncpy(drvinfo->fw_version, "N/A", 32);
1500 strncpy(drvinfo->bus_info, "platform", 32);
1501 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1502 }
1503
1504 static int mv643xx_eth_nway_reset(struct net_device *dev)
1505 {
1506 struct mv643xx_eth_private *mp = netdev_priv(dev);
1507
1508 if (mp->phy == NULL)
1509 return -EINVAL;
1510
1511 return genphy_restart_aneg(mp->phy);
1512 }
1513
1514 static u32 mv643xx_eth_get_link(struct net_device *dev)
1515 {
1516 return !!netif_carrier_ok(dev);
1517 }
1518
1519 static int
1520 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1521 {
1522 struct mv643xx_eth_private *mp = netdev_priv(dev);
1523
1524 ec->rx_coalesce_usecs = get_rx_coal(mp);
1525 ec->tx_coalesce_usecs = get_tx_coal(mp);
1526
1527 return 0;
1528 }
1529
1530 static int
1531 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1532 {
1533 struct mv643xx_eth_private *mp = netdev_priv(dev);
1534
1535 set_rx_coal(mp, ec->rx_coalesce_usecs);
1536 set_tx_coal(mp, ec->tx_coalesce_usecs);
1537
1538 return 0;
1539 }
1540
1541 static void
1542 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1543 {
1544 struct mv643xx_eth_private *mp = netdev_priv(dev);
1545
1546 er->rx_max_pending = 4096;
1547 er->tx_max_pending = 4096;
1548 er->rx_mini_max_pending = 0;
1549 er->rx_jumbo_max_pending = 0;
1550
1551 er->rx_pending = mp->rx_ring_size;
1552 er->tx_pending = mp->tx_ring_size;
1553 er->rx_mini_pending = 0;
1554 er->rx_jumbo_pending = 0;
1555 }
1556
1557 static int
1558 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1559 {
1560 struct mv643xx_eth_private *mp = netdev_priv(dev);
1561
1562 if (er->rx_mini_pending || er->rx_jumbo_pending)
1563 return -EINVAL;
1564
1565 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1566 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1567
1568 if (netif_running(dev)) {
1569 mv643xx_eth_stop(dev);
1570 if (mv643xx_eth_open(dev)) {
1571 dev_printk(KERN_ERR, &dev->dev,
1572 "fatal error on re-opening device after "
1573 "ring param change\n");
1574 return -ENOMEM;
1575 }
1576 }
1577
1578 return 0;
1579 }
1580
1581 static u32
1582 mv643xx_eth_get_rx_csum(struct net_device *dev)
1583 {
1584 struct mv643xx_eth_private *mp = netdev_priv(dev);
1585
1586 return !!(rdlp(mp, PORT_CONFIG) & 0x02000000);
1587 }
1588
1589 static int
1590 mv643xx_eth_set_rx_csum(struct net_device *dev, u32 rx_csum)
1591 {
1592 struct mv643xx_eth_private *mp = netdev_priv(dev);
1593
1594 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1595
1596 return 0;
1597 }
1598
1599 static void mv643xx_eth_get_strings(struct net_device *dev,
1600 uint32_t stringset, uint8_t *data)
1601 {
1602 int i;
1603
1604 if (stringset == ETH_SS_STATS) {
1605 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1606 memcpy(data + i * ETH_GSTRING_LEN,
1607 mv643xx_eth_stats[i].stat_string,
1608 ETH_GSTRING_LEN);
1609 }
1610 }
1611 }
1612
1613 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1614 struct ethtool_stats *stats,
1615 uint64_t *data)
1616 {
1617 struct mv643xx_eth_private *mp = netdev_priv(dev);
1618 int i;
1619
1620 mv643xx_eth_get_stats(dev);
1621 mib_counters_update(mp);
1622 mv643xx_eth_grab_lro_stats(mp);
1623
1624 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1625 const struct mv643xx_eth_stats *stat;
1626 void *p;
1627
1628 stat = mv643xx_eth_stats + i;
1629
1630 if (stat->netdev_off >= 0)
1631 p = ((void *)mp->dev) + stat->netdev_off;
1632 else
1633 p = ((void *)mp) + stat->mp_off;
1634
1635 data[i] = (stat->sizeof_stat == 8) ?
1636 *(uint64_t *)p : *(uint32_t *)p;
1637 }
1638 }
1639
1640 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1641 {
1642 if (sset == ETH_SS_STATS)
1643 return ARRAY_SIZE(mv643xx_eth_stats);
1644
1645 return -EOPNOTSUPP;
1646 }
1647
1648 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1649 .get_settings = mv643xx_eth_get_settings,
1650 .set_settings = mv643xx_eth_set_settings,
1651 .get_drvinfo = mv643xx_eth_get_drvinfo,
1652 .nway_reset = mv643xx_eth_nway_reset,
1653 .get_link = mv643xx_eth_get_link,
1654 .get_coalesce = mv643xx_eth_get_coalesce,
1655 .set_coalesce = mv643xx_eth_set_coalesce,
1656 .get_ringparam = mv643xx_eth_get_ringparam,
1657 .set_ringparam = mv643xx_eth_set_ringparam,
1658 .get_rx_csum = mv643xx_eth_get_rx_csum,
1659 .set_rx_csum = mv643xx_eth_set_rx_csum,
1660 .set_tx_csum = ethtool_op_set_tx_csum,
1661 .set_sg = ethtool_op_set_sg,
1662 .get_strings = mv643xx_eth_get_strings,
1663 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1664 .get_flags = ethtool_op_get_flags,
1665 .set_flags = ethtool_op_set_flags,
1666 .get_sset_count = mv643xx_eth_get_sset_count,
1667 };
1668
1669
1670 /* address handling *********************************************************/
1671 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1672 {
1673 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1674 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1675
1676 addr[0] = (mac_h >> 24) & 0xff;
1677 addr[1] = (mac_h >> 16) & 0xff;
1678 addr[2] = (mac_h >> 8) & 0xff;
1679 addr[3] = mac_h & 0xff;
1680 addr[4] = (mac_l >> 8) & 0xff;
1681 addr[5] = mac_l & 0xff;
1682 }
1683
1684 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1685 {
1686 wrlp(mp, MAC_ADDR_HIGH,
1687 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1688 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1689 }
1690
1691 static u32 uc_addr_filter_mask(struct net_device *dev)
1692 {
1693 struct netdev_hw_addr *ha;
1694 u32 nibbles;
1695
1696 if (dev->flags & IFF_PROMISC)
1697 return 0;
1698
1699 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1700 netdev_for_each_uc_addr(ha, dev) {
1701 if (memcmp(dev->dev_addr, ha->addr, 5))
1702 return 0;
1703 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1704 return 0;
1705
1706 nibbles |= 1 << (ha->addr[5] & 0x0f);
1707 }
1708
1709 return nibbles;
1710 }
1711
1712 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1713 {
1714 struct mv643xx_eth_private *mp = netdev_priv(dev);
1715 u32 port_config;
1716 u32 nibbles;
1717 int i;
1718
1719 uc_addr_set(mp, dev->dev_addr);
1720
1721 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1722
1723 nibbles = uc_addr_filter_mask(dev);
1724 if (!nibbles) {
1725 port_config |= UNICAST_PROMISCUOUS_MODE;
1726 nibbles = 0xffff;
1727 }
1728
1729 for (i = 0; i < 16; i += 4) {
1730 int off = UNICAST_TABLE(mp->port_num) + i;
1731 u32 v;
1732
1733 v = 0;
1734 if (nibbles & 1)
1735 v |= 0x00000001;
1736 if (nibbles & 2)
1737 v |= 0x00000100;
1738 if (nibbles & 4)
1739 v |= 0x00010000;
1740 if (nibbles & 8)
1741 v |= 0x01000000;
1742 nibbles >>= 4;
1743
1744 wrl(mp, off, v);
1745 }
1746
1747 wrlp(mp, PORT_CONFIG, port_config);
1748 }
1749
1750 static int addr_crc(unsigned char *addr)
1751 {
1752 int crc = 0;
1753 int i;
1754
1755 for (i = 0; i < 6; i++) {
1756 int j;
1757
1758 crc = (crc ^ addr[i]) << 8;
1759 for (j = 7; j >= 0; j--) {
1760 if (crc & (0x100 << j))
1761 crc ^= 0x107 << j;
1762 }
1763 }
1764
1765 return crc;
1766 }
1767
1768 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1769 {
1770 struct mv643xx_eth_private *mp = netdev_priv(dev);
1771 u32 *mc_spec;
1772 u32 *mc_other;
1773 struct dev_addr_list *addr;
1774 int i;
1775
1776 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1777 int port_num;
1778 u32 accept;
1779
1780 oom:
1781 port_num = mp->port_num;
1782 accept = 0x01010101;
1783 for (i = 0; i < 0x100; i += 4) {
1784 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1785 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1786 }
1787 return;
1788 }
1789
1790 mc_spec = kmalloc(0x200, GFP_ATOMIC);
1791 if (mc_spec == NULL)
1792 goto oom;
1793 mc_other = mc_spec + (0x100 >> 2);
1794
1795 memset(mc_spec, 0, 0x100);
1796 memset(mc_other, 0, 0x100);
1797
1798 netdev_for_each_mc_addr(addr, dev) {
1799 u8 *a = addr->da_addr;
1800 u32 *table;
1801 int entry;
1802
1803 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1804 table = mc_spec;
1805 entry = a[5];
1806 } else {
1807 table = mc_other;
1808 entry = addr_crc(a);
1809 }
1810
1811 table[entry >> 2] |= 1 << (8 * (entry & 3));
1812 }
1813
1814 for (i = 0; i < 0x100; i += 4) {
1815 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]);
1816 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]);
1817 }
1818
1819 kfree(mc_spec);
1820 }
1821
1822 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1823 {
1824 mv643xx_eth_program_unicast_filter(dev);
1825 mv643xx_eth_program_multicast_filter(dev);
1826 }
1827
1828 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1829 {
1830 struct sockaddr *sa = addr;
1831
1832 if (!is_valid_ether_addr(sa->sa_data))
1833 return -EINVAL;
1834
1835 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1836
1837 netif_addr_lock_bh(dev);
1838 mv643xx_eth_program_unicast_filter(dev);
1839 netif_addr_unlock_bh(dev);
1840
1841 return 0;
1842 }
1843
1844
1845 /* rx/tx queue initialisation ***********************************************/
1846 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1847 {
1848 struct rx_queue *rxq = mp->rxq + index;
1849 struct rx_desc *rx_desc;
1850 int size;
1851 int i;
1852
1853 rxq->index = index;
1854
1855 rxq->rx_ring_size = mp->rx_ring_size;
1856
1857 rxq->rx_desc_count = 0;
1858 rxq->rx_curr_desc = 0;
1859 rxq->rx_used_desc = 0;
1860
1861 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1862
1863 if (index == 0 && size <= mp->rx_desc_sram_size) {
1864 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1865 mp->rx_desc_sram_size);
1866 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1867 } else {
1868 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1869 size, &rxq->rx_desc_dma,
1870 GFP_KERNEL);
1871 }
1872
1873 if (rxq->rx_desc_area == NULL) {
1874 dev_printk(KERN_ERR, &mp->dev->dev,
1875 "can't allocate rx ring (%d bytes)\n", size);
1876 goto out;
1877 }
1878 memset(rxq->rx_desc_area, 0, size);
1879
1880 rxq->rx_desc_area_size = size;
1881 rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1882 GFP_KERNEL);
1883 if (rxq->rx_skb == NULL) {
1884 dev_printk(KERN_ERR, &mp->dev->dev,
1885 "can't allocate rx skb ring\n");
1886 goto out_free;
1887 }
1888
1889 rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1890 for (i = 0; i < rxq->rx_ring_size; i++) {
1891 int nexti;
1892
1893 nexti = i + 1;
1894 if (nexti == rxq->rx_ring_size)
1895 nexti = 0;
1896
1897 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1898 nexti * sizeof(struct rx_desc);
1899 }
1900
1901 rxq->lro_mgr.dev = mp->dev;
1902 memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats));
1903 rxq->lro_mgr.features = LRO_F_NAPI;
1904 rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1905 rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1906 rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr);
1907 rxq->lro_mgr.max_aggr = 32;
1908 rxq->lro_mgr.frag_align_pad = 0;
1909 rxq->lro_mgr.lro_arr = rxq->lro_arr;
1910 rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header;
1911
1912 memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr));
1913
1914 return 0;
1915
1916
1917 out_free:
1918 if (index == 0 && size <= mp->rx_desc_sram_size)
1919 iounmap(rxq->rx_desc_area);
1920 else
1921 dma_free_coherent(mp->dev->dev.parent, size,
1922 rxq->rx_desc_area,
1923 rxq->rx_desc_dma);
1924
1925 out:
1926 return -ENOMEM;
1927 }
1928
1929 static void rxq_deinit(struct rx_queue *rxq)
1930 {
1931 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1932 int i;
1933
1934 rxq_disable(rxq);
1935
1936 for (i = 0; i < rxq->rx_ring_size; i++) {
1937 if (rxq->rx_skb[i]) {
1938 dev_kfree_skb(rxq->rx_skb[i]);
1939 rxq->rx_desc_count--;
1940 }
1941 }
1942
1943 if (rxq->rx_desc_count) {
1944 dev_printk(KERN_ERR, &mp->dev->dev,
1945 "error freeing rx ring -- %d skbs stuck\n",
1946 rxq->rx_desc_count);
1947 }
1948
1949 if (rxq->index == 0 &&
1950 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1951 iounmap(rxq->rx_desc_area);
1952 else
1953 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
1954 rxq->rx_desc_area, rxq->rx_desc_dma);
1955
1956 kfree(rxq->rx_skb);
1957 }
1958
1959 static int txq_init(struct mv643xx_eth_private *mp, int index)
1960 {
1961 struct tx_queue *txq = mp->txq + index;
1962 struct tx_desc *tx_desc;
1963 int size;
1964 int i;
1965
1966 txq->index = index;
1967
1968 txq->tx_ring_size = mp->tx_ring_size;
1969
1970 txq->tx_desc_count = 0;
1971 txq->tx_curr_desc = 0;
1972 txq->tx_used_desc = 0;
1973
1974 size = txq->tx_ring_size * sizeof(struct tx_desc);
1975
1976 if (index == 0 && size <= mp->tx_desc_sram_size) {
1977 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
1978 mp->tx_desc_sram_size);
1979 txq->tx_desc_dma = mp->tx_desc_sram_addr;
1980 } else {
1981 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1982 size, &txq->tx_desc_dma,
1983 GFP_KERNEL);
1984 }
1985
1986 if (txq->tx_desc_area == NULL) {
1987 dev_printk(KERN_ERR, &mp->dev->dev,
1988 "can't allocate tx ring (%d bytes)\n", size);
1989 return -ENOMEM;
1990 }
1991 memset(txq->tx_desc_area, 0, size);
1992
1993 txq->tx_desc_area_size = size;
1994
1995 tx_desc = (struct tx_desc *)txq->tx_desc_area;
1996 for (i = 0; i < txq->tx_ring_size; i++) {
1997 struct tx_desc *txd = tx_desc + i;
1998 int nexti;
1999
2000 nexti = i + 1;
2001 if (nexti == txq->tx_ring_size)
2002 nexti = 0;
2003
2004 txd->cmd_sts = 0;
2005 txd->next_desc_ptr = txq->tx_desc_dma +
2006 nexti * sizeof(struct tx_desc);
2007 }
2008
2009 skb_queue_head_init(&txq->tx_skb);
2010
2011 return 0;
2012 }
2013
2014 static void txq_deinit(struct tx_queue *txq)
2015 {
2016 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2017
2018 txq_disable(txq);
2019 txq_reclaim(txq, txq->tx_ring_size, 1);
2020
2021 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2022
2023 if (txq->index == 0 &&
2024 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2025 iounmap(txq->tx_desc_area);
2026 else
2027 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2028 txq->tx_desc_area, txq->tx_desc_dma);
2029 }
2030
2031
2032 /* netdev ops and related ***************************************************/
2033 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2034 {
2035 u32 int_cause;
2036 u32 int_cause_ext;
2037
2038 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
2039 if (int_cause == 0)
2040 return 0;
2041
2042 int_cause_ext = 0;
2043 if (int_cause & INT_EXT) {
2044 int_cause &= ~INT_EXT;
2045 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2046 }
2047
2048 if (int_cause) {
2049 wrlp(mp, INT_CAUSE, ~int_cause);
2050 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2051 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2052 mp->work_rx |= (int_cause & INT_RX) >> 2;
2053 }
2054
2055 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2056 if (int_cause_ext) {
2057 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2058 if (int_cause_ext & INT_EXT_LINK_PHY)
2059 mp->work_link = 1;
2060 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2061 }
2062
2063 return 1;
2064 }
2065
2066 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2067 {
2068 struct net_device *dev = (struct net_device *)dev_id;
2069 struct mv643xx_eth_private *mp = netdev_priv(dev);
2070
2071 if (unlikely(!mv643xx_eth_collect_events(mp)))
2072 return IRQ_NONE;
2073
2074 wrlp(mp, INT_MASK, 0);
2075 napi_schedule(&mp->napi);
2076
2077 return IRQ_HANDLED;
2078 }
2079
2080 static void handle_link_event(struct mv643xx_eth_private *mp)
2081 {
2082 struct net_device *dev = mp->dev;
2083 u32 port_status;
2084 int speed;
2085 int duplex;
2086 int fc;
2087
2088 port_status = rdlp(mp, PORT_STATUS);
2089 if (!(port_status & LINK_UP)) {
2090 if (netif_carrier_ok(dev)) {
2091 int i;
2092
2093 printk(KERN_INFO "%s: link down\n", dev->name);
2094
2095 netif_carrier_off(dev);
2096
2097 for (i = 0; i < mp->txq_count; i++) {
2098 struct tx_queue *txq = mp->txq + i;
2099
2100 txq_reclaim(txq, txq->tx_ring_size, 1);
2101 txq_reset_hw_ptr(txq);
2102 }
2103 }
2104 return;
2105 }
2106
2107 switch (port_status & PORT_SPEED_MASK) {
2108 case PORT_SPEED_10:
2109 speed = 10;
2110 break;
2111 case PORT_SPEED_100:
2112 speed = 100;
2113 break;
2114 case PORT_SPEED_1000:
2115 speed = 1000;
2116 break;
2117 default:
2118 speed = -1;
2119 break;
2120 }
2121 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2122 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2123
2124 printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
2125 "flow control %sabled\n", dev->name,
2126 speed, duplex ? "full" : "half",
2127 fc ? "en" : "dis");
2128
2129 if (!netif_carrier_ok(dev))
2130 netif_carrier_on(dev);
2131 }
2132
2133 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2134 {
2135 struct mv643xx_eth_private *mp;
2136 int work_done;
2137
2138 mp = container_of(napi, struct mv643xx_eth_private, napi);
2139
2140 if (unlikely(mp->oom)) {
2141 mp->oom = 0;
2142 del_timer(&mp->rx_oom);
2143 }
2144
2145 work_done = 0;
2146 while (work_done < budget) {
2147 u8 queue_mask;
2148 int queue;
2149 int work_tbd;
2150
2151 if (mp->work_link) {
2152 mp->work_link = 0;
2153 handle_link_event(mp);
2154 work_done++;
2155 continue;
2156 }
2157
2158 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2159 if (likely(!mp->oom))
2160 queue_mask |= mp->work_rx_refill;
2161
2162 if (!queue_mask) {
2163 if (mv643xx_eth_collect_events(mp))
2164 continue;
2165 break;
2166 }
2167
2168 queue = fls(queue_mask) - 1;
2169 queue_mask = 1 << queue;
2170
2171 work_tbd = budget - work_done;
2172 if (work_tbd > 16)
2173 work_tbd = 16;
2174
2175 if (mp->work_tx_end & queue_mask) {
2176 txq_kick(mp->txq + queue);
2177 } else if (mp->work_tx & queue_mask) {
2178 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2179 txq_maybe_wake(mp->txq + queue);
2180 } else if (mp->work_rx & queue_mask) {
2181 work_done += rxq_process(mp->rxq + queue, work_tbd);
2182 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2183 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2184 } else {
2185 BUG();
2186 }
2187 }
2188
2189 if (work_done < budget) {
2190 if (mp->oom)
2191 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2192 napi_complete(napi);
2193 wrlp(mp, INT_MASK, mp->int_mask);
2194 }
2195
2196 return work_done;
2197 }
2198
2199 static inline void oom_timer_wrapper(unsigned long data)
2200 {
2201 struct mv643xx_eth_private *mp = (void *)data;
2202
2203 napi_schedule(&mp->napi);
2204 }
2205
2206 static void phy_reset(struct mv643xx_eth_private *mp)
2207 {
2208 int data;
2209
2210 data = phy_read(mp->phy, MII_BMCR);
2211 if (data < 0)
2212 return;
2213
2214 data |= BMCR_RESET;
2215 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2216 return;
2217
2218 do {
2219 data = phy_read(mp->phy, MII_BMCR);
2220 } while (data >= 0 && data & BMCR_RESET);
2221 }
2222
2223 static void port_start(struct mv643xx_eth_private *mp)
2224 {
2225 u32 pscr;
2226 int i;
2227
2228 /*
2229 * Perform PHY reset, if there is a PHY.
2230 */
2231 if (mp->phy != NULL) {
2232 struct ethtool_cmd cmd;
2233
2234 mv643xx_eth_get_settings(mp->dev, &cmd);
2235 phy_reset(mp);
2236 mv643xx_eth_set_settings(mp->dev, &cmd);
2237 }
2238
2239 /*
2240 * Configure basic link parameters.
2241 */
2242 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2243
2244 pscr |= SERIAL_PORT_ENABLE;
2245 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2246
2247 pscr |= DO_NOT_FORCE_LINK_FAIL;
2248 if (mp->phy == NULL)
2249 pscr |= FORCE_LINK_PASS;
2250 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2251
2252 /*
2253 * Configure TX path and queues.
2254 */
2255 tx_set_rate(mp, 1000000000, 16777216);
2256 for (i = 0; i < mp->txq_count; i++) {
2257 struct tx_queue *txq = mp->txq + i;
2258
2259 txq_reset_hw_ptr(txq);
2260 txq_set_rate(txq, 1000000000, 16777216);
2261 txq_set_fixed_prio_mode(txq);
2262 }
2263
2264 /*
2265 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2266 * frames to RX queue #0, and include the pseudo-header when
2267 * calculating receive checksums.
2268 */
2269 wrlp(mp, PORT_CONFIG, 0x02000000);
2270
2271 /*
2272 * Treat BPDUs as normal multicasts, and disable partition mode.
2273 */
2274 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2275
2276 /*
2277 * Add configured unicast addresses to address filter table.
2278 */
2279 mv643xx_eth_program_unicast_filter(mp->dev);
2280
2281 /*
2282 * Enable the receive queues.
2283 */
2284 for (i = 0; i < mp->rxq_count; i++) {
2285 struct rx_queue *rxq = mp->rxq + i;
2286 u32 addr;
2287
2288 addr = (u32)rxq->rx_desc_dma;
2289 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2290 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2291
2292 rxq_enable(rxq);
2293 }
2294 }
2295
2296 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2297 {
2298 int skb_size;
2299
2300 /*
2301 * Reserve 2+14 bytes for an ethernet header (the hardware
2302 * automatically prepends 2 bytes of dummy data to each
2303 * received packet), 16 bytes for up to four VLAN tags, and
2304 * 4 bytes for the trailing FCS -- 36 bytes total.
2305 */
2306 skb_size = mp->dev->mtu + 36;
2307
2308 /*
2309 * Make sure that the skb size is a multiple of 8 bytes, as
2310 * the lower three bits of the receive descriptor's buffer
2311 * size field are ignored by the hardware.
2312 */
2313 mp->skb_size = (skb_size + 7) & ~7;
2314
2315 /*
2316 * If NET_SKB_PAD is smaller than a cache line,
2317 * netdev_alloc_skb() will cause skb->data to be misaligned
2318 * to a cache line boundary. If this is the case, include
2319 * some extra space to allow re-aligning the data area.
2320 */
2321 mp->skb_size += SKB_DMA_REALIGN;
2322 }
2323
2324 static int mv643xx_eth_open(struct net_device *dev)
2325 {
2326 struct mv643xx_eth_private *mp = netdev_priv(dev);
2327 int err;
2328 int i;
2329
2330 wrlp(mp, INT_CAUSE, 0);
2331 wrlp(mp, INT_CAUSE_EXT, 0);
2332 rdlp(mp, INT_CAUSE_EXT);
2333
2334 err = request_irq(dev->irq, mv643xx_eth_irq,
2335 IRQF_SHARED, dev->name, dev);
2336 if (err) {
2337 dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
2338 return -EAGAIN;
2339 }
2340
2341 mv643xx_eth_recalc_skb_size(mp);
2342
2343 napi_enable(&mp->napi);
2344
2345 skb_queue_head_init(&mp->rx_recycle);
2346
2347 mp->int_mask = INT_EXT;
2348
2349 for (i = 0; i < mp->rxq_count; i++) {
2350 err = rxq_init(mp, i);
2351 if (err) {
2352 while (--i >= 0)
2353 rxq_deinit(mp->rxq + i);
2354 goto out;
2355 }
2356
2357 rxq_refill(mp->rxq + i, INT_MAX);
2358 mp->int_mask |= INT_RX_0 << i;
2359 }
2360
2361 if (mp->oom) {
2362 mp->rx_oom.expires = jiffies + (HZ / 10);
2363 add_timer(&mp->rx_oom);
2364 }
2365
2366 for (i = 0; i < mp->txq_count; i++) {
2367 err = txq_init(mp, i);
2368 if (err) {
2369 while (--i >= 0)
2370 txq_deinit(mp->txq + i);
2371 goto out_free;
2372 }
2373 mp->int_mask |= INT_TX_END_0 << i;
2374 }
2375
2376 port_start(mp);
2377
2378 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2379 wrlp(mp, INT_MASK, mp->int_mask);
2380
2381 return 0;
2382
2383
2384 out_free:
2385 for (i = 0; i < mp->rxq_count; i++)
2386 rxq_deinit(mp->rxq + i);
2387 out:
2388 free_irq(dev->irq, dev);
2389
2390 return err;
2391 }
2392
2393 static void port_reset(struct mv643xx_eth_private *mp)
2394 {
2395 unsigned int data;
2396 int i;
2397
2398 for (i = 0; i < mp->rxq_count; i++)
2399 rxq_disable(mp->rxq + i);
2400 for (i = 0; i < mp->txq_count; i++)
2401 txq_disable(mp->txq + i);
2402
2403 while (1) {
2404 u32 ps = rdlp(mp, PORT_STATUS);
2405
2406 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2407 break;
2408 udelay(10);
2409 }
2410
2411 /* Reset the Enable bit in the Configuration Register */
2412 data = rdlp(mp, PORT_SERIAL_CONTROL);
2413 data &= ~(SERIAL_PORT_ENABLE |
2414 DO_NOT_FORCE_LINK_FAIL |
2415 FORCE_LINK_PASS);
2416 wrlp(mp, PORT_SERIAL_CONTROL, data);
2417 }
2418
2419 static int mv643xx_eth_stop(struct net_device *dev)
2420 {
2421 struct mv643xx_eth_private *mp = netdev_priv(dev);
2422 int i;
2423
2424 wrlp(mp, INT_MASK_EXT, 0x00000000);
2425 wrlp(mp, INT_MASK, 0x00000000);
2426 rdlp(mp, INT_MASK);
2427
2428 napi_disable(&mp->napi);
2429
2430 del_timer_sync(&mp->rx_oom);
2431
2432 netif_carrier_off(dev);
2433
2434 free_irq(dev->irq, dev);
2435
2436 port_reset(mp);
2437 mv643xx_eth_get_stats(dev);
2438 mib_counters_update(mp);
2439 del_timer_sync(&mp->mib_counters_timer);
2440
2441 skb_queue_purge(&mp->rx_recycle);
2442
2443 for (i = 0; i < mp->rxq_count; i++)
2444 rxq_deinit(mp->rxq + i);
2445 for (i = 0; i < mp->txq_count; i++)
2446 txq_deinit(mp->txq + i);
2447
2448 return 0;
2449 }
2450
2451 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2452 {
2453 struct mv643xx_eth_private *mp = netdev_priv(dev);
2454
2455 if (mp->phy != NULL)
2456 return phy_mii_ioctl(mp->phy, if_mii(ifr), cmd);
2457
2458 return -EOPNOTSUPP;
2459 }
2460
2461 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2462 {
2463 struct mv643xx_eth_private *mp = netdev_priv(dev);
2464
2465 if (new_mtu < 64 || new_mtu > 9500)
2466 return -EINVAL;
2467
2468 dev->mtu = new_mtu;
2469 mv643xx_eth_recalc_skb_size(mp);
2470 tx_set_rate(mp, 1000000000, 16777216);
2471
2472 if (!netif_running(dev))
2473 return 0;
2474
2475 /*
2476 * Stop and then re-open the interface. This will allocate RX
2477 * skbs of the new MTU.
2478 * There is a possible danger that the open will not succeed,
2479 * due to memory being full.
2480 */
2481 mv643xx_eth_stop(dev);
2482 if (mv643xx_eth_open(dev)) {
2483 dev_printk(KERN_ERR, &dev->dev,
2484 "fatal error on re-opening device after "
2485 "MTU change\n");
2486 }
2487
2488 return 0;
2489 }
2490
2491 static void tx_timeout_task(struct work_struct *ugly)
2492 {
2493 struct mv643xx_eth_private *mp;
2494
2495 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2496 if (netif_running(mp->dev)) {
2497 netif_tx_stop_all_queues(mp->dev);
2498 port_reset(mp);
2499 port_start(mp);
2500 netif_tx_wake_all_queues(mp->dev);
2501 }
2502 }
2503
2504 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2505 {
2506 struct mv643xx_eth_private *mp = netdev_priv(dev);
2507
2508 dev_printk(KERN_INFO, &dev->dev, "tx timeout\n");
2509
2510 schedule_work(&mp->tx_timeout_task);
2511 }
2512
2513 #ifdef CONFIG_NET_POLL_CONTROLLER
2514 static void mv643xx_eth_netpoll(struct net_device *dev)
2515 {
2516 struct mv643xx_eth_private *mp = netdev_priv(dev);
2517
2518 wrlp(mp, INT_MASK, 0x00000000);
2519 rdlp(mp, INT_MASK);
2520
2521 mv643xx_eth_irq(dev->irq, dev);
2522
2523 wrlp(mp, INT_MASK, mp->int_mask);
2524 }
2525 #endif
2526
2527
2528 /* platform glue ************************************************************/
2529 static void
2530 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2531 struct mbus_dram_target_info *dram)
2532 {
2533 void __iomem *base = msp->base;
2534 u32 win_enable;
2535 u32 win_protect;
2536 int i;
2537
2538 for (i = 0; i < 6; i++) {
2539 writel(0, base + WINDOW_BASE(i));
2540 writel(0, base + WINDOW_SIZE(i));
2541 if (i < 4)
2542 writel(0, base + WINDOW_REMAP_HIGH(i));
2543 }
2544
2545 win_enable = 0x3f;
2546 win_protect = 0;
2547
2548 for (i = 0; i < dram->num_cs; i++) {
2549 struct mbus_dram_window *cs = dram->cs + i;
2550
2551 writel((cs->base & 0xffff0000) |
2552 (cs->mbus_attr << 8) |
2553 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2554 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2555
2556 win_enable &= ~(1 << i);
2557 win_protect |= 3 << (2 * i);
2558 }
2559
2560 writel(win_enable, base + WINDOW_BAR_ENABLE);
2561 msp->win_protect = win_protect;
2562 }
2563
2564 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2565 {
2566 /*
2567 * Check whether we have a 14-bit coal limit field in bits
2568 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2569 * SDMA config register.
2570 */
2571 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2572 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2573 msp->extended_rx_coal_limit = 1;
2574 else
2575 msp->extended_rx_coal_limit = 0;
2576
2577 /*
2578 * Check whether the MAC supports TX rate control, and if
2579 * yes, whether its associated registers are in the old or
2580 * the new place.
2581 */
2582 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2583 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2584 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2585 } else {
2586 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2587 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2588 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2589 else
2590 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2591 }
2592 }
2593
2594 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2595 {
2596 static int mv643xx_eth_version_printed;
2597 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2598 struct mv643xx_eth_shared_private *msp;
2599 struct resource *res;
2600 int ret;
2601
2602 if (!mv643xx_eth_version_printed++)
2603 printk(KERN_NOTICE "MV-643xx 10/100/1000 ethernet "
2604 "driver version %s\n", mv643xx_eth_driver_version);
2605
2606 ret = -EINVAL;
2607 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2608 if (res == NULL)
2609 goto out;
2610
2611 ret = -ENOMEM;
2612 msp = kmalloc(sizeof(*msp), GFP_KERNEL);
2613 if (msp == NULL)
2614 goto out;
2615 memset(msp, 0, sizeof(*msp));
2616
2617 msp->base = ioremap(res->start, res->end - res->start + 1);
2618 if (msp->base == NULL)
2619 goto out_free;
2620
2621 /*
2622 * Set up and register SMI bus.
2623 */
2624 if (pd == NULL || pd->shared_smi == NULL) {
2625 msp->smi_bus = mdiobus_alloc();
2626 if (msp->smi_bus == NULL)
2627 goto out_unmap;
2628
2629 msp->smi_bus->priv = msp;
2630 msp->smi_bus->name = "mv643xx_eth smi";
2631 msp->smi_bus->read = smi_bus_read;
2632 msp->smi_bus->write = smi_bus_write,
2633 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2634 msp->smi_bus->parent = &pdev->dev;
2635 msp->smi_bus->phy_mask = 0xffffffff;
2636 if (mdiobus_register(msp->smi_bus) < 0)
2637 goto out_free_mii_bus;
2638 msp->smi = msp;
2639 } else {
2640 msp->smi = platform_get_drvdata(pd->shared_smi);
2641 }
2642
2643 msp->err_interrupt = NO_IRQ;
2644 init_waitqueue_head(&msp->smi_busy_wait);
2645
2646 /*
2647 * Check whether the error interrupt is hooked up.
2648 */
2649 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2650 if (res != NULL) {
2651 int err;
2652
2653 err = request_irq(res->start, mv643xx_eth_err_irq,
2654 IRQF_SHARED, "mv643xx_eth", msp);
2655 if (!err) {
2656 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2657 msp->err_interrupt = res->start;
2658 }
2659 }
2660
2661 /*
2662 * (Re-)program MBUS remapping windows if we are asked to.
2663 */
2664 if (pd != NULL && pd->dram != NULL)
2665 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2666
2667 /*
2668 * Detect hardware parameters.
2669 */
2670 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2671 infer_hw_params(msp);
2672
2673 platform_set_drvdata(pdev, msp);
2674
2675 return 0;
2676
2677 out_free_mii_bus:
2678 mdiobus_free(msp->smi_bus);
2679 out_unmap:
2680 iounmap(msp->base);
2681 out_free:
2682 kfree(msp);
2683 out:
2684 return ret;
2685 }
2686
2687 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2688 {
2689 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2690 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2691
2692 if (pd == NULL || pd->shared_smi == NULL) {
2693 mdiobus_unregister(msp->smi_bus);
2694 mdiobus_free(msp->smi_bus);
2695 }
2696 if (msp->err_interrupt != NO_IRQ)
2697 free_irq(msp->err_interrupt, msp);
2698 iounmap(msp->base);
2699 kfree(msp);
2700
2701 return 0;
2702 }
2703
2704 static struct platform_driver mv643xx_eth_shared_driver = {
2705 .probe = mv643xx_eth_shared_probe,
2706 .remove = mv643xx_eth_shared_remove,
2707 .driver = {
2708 .name = MV643XX_ETH_SHARED_NAME,
2709 .owner = THIS_MODULE,
2710 },
2711 };
2712
2713 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2714 {
2715 int addr_shift = 5 * mp->port_num;
2716 u32 data;
2717
2718 data = rdl(mp, PHY_ADDR);
2719 data &= ~(0x1f << addr_shift);
2720 data |= (phy_addr & 0x1f) << addr_shift;
2721 wrl(mp, PHY_ADDR, data);
2722 }
2723
2724 static int phy_addr_get(struct mv643xx_eth_private *mp)
2725 {
2726 unsigned int data;
2727
2728 data = rdl(mp, PHY_ADDR);
2729
2730 return (data >> (5 * mp->port_num)) & 0x1f;
2731 }
2732
2733 static void set_params(struct mv643xx_eth_private *mp,
2734 struct mv643xx_eth_platform_data *pd)
2735 {
2736 struct net_device *dev = mp->dev;
2737
2738 if (is_valid_ether_addr(pd->mac_addr))
2739 memcpy(dev->dev_addr, pd->mac_addr, 6);
2740 else
2741 uc_addr_get(mp, dev->dev_addr);
2742
2743 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2744 if (pd->rx_queue_size)
2745 mp->rx_ring_size = pd->rx_queue_size;
2746 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2747 mp->rx_desc_sram_size = pd->rx_sram_size;
2748
2749 mp->rxq_count = pd->rx_queue_count ? : 1;
2750
2751 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2752 if (pd->tx_queue_size)
2753 mp->tx_ring_size = pd->tx_queue_size;
2754 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2755 mp->tx_desc_sram_size = pd->tx_sram_size;
2756
2757 mp->txq_count = pd->tx_queue_count ? : 1;
2758 }
2759
2760 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2761 int phy_addr)
2762 {
2763 struct mii_bus *bus = mp->shared->smi->smi_bus;
2764 struct phy_device *phydev;
2765 int start;
2766 int num;
2767 int i;
2768
2769 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2770 start = phy_addr_get(mp) & 0x1f;
2771 num = 32;
2772 } else {
2773 start = phy_addr & 0x1f;
2774 num = 1;
2775 }
2776
2777 phydev = NULL;
2778 for (i = 0; i < num; i++) {
2779 int addr = (start + i) & 0x1f;
2780
2781 if (bus->phy_map[addr] == NULL)
2782 mdiobus_scan(bus, addr);
2783
2784 if (phydev == NULL) {
2785 phydev = bus->phy_map[addr];
2786 if (phydev != NULL)
2787 phy_addr_set(mp, addr);
2788 }
2789 }
2790
2791 return phydev;
2792 }
2793
2794 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2795 {
2796 struct phy_device *phy = mp->phy;
2797
2798 phy_reset(mp);
2799
2800 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2801
2802 if (speed == 0) {
2803 phy->autoneg = AUTONEG_ENABLE;
2804 phy->speed = 0;
2805 phy->duplex = 0;
2806 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2807 } else {
2808 phy->autoneg = AUTONEG_DISABLE;
2809 phy->advertising = 0;
2810 phy->speed = speed;
2811 phy->duplex = duplex;
2812 }
2813 phy_start_aneg(phy);
2814 }
2815
2816 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2817 {
2818 u32 pscr;
2819
2820 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2821 if (pscr & SERIAL_PORT_ENABLE) {
2822 pscr &= ~SERIAL_PORT_ENABLE;
2823 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2824 }
2825
2826 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2827 if (mp->phy == NULL) {
2828 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2829 if (speed == SPEED_1000)
2830 pscr |= SET_GMII_SPEED_TO_1000;
2831 else if (speed == SPEED_100)
2832 pscr |= SET_MII_SPEED_TO_100;
2833
2834 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2835
2836 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2837 if (duplex == DUPLEX_FULL)
2838 pscr |= SET_FULL_DUPLEX_MODE;
2839 }
2840
2841 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2842 }
2843
2844 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2845 .ndo_open = mv643xx_eth_open,
2846 .ndo_stop = mv643xx_eth_stop,
2847 .ndo_start_xmit = mv643xx_eth_xmit,
2848 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2849 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2850 .ndo_validate_addr = eth_validate_addr,
2851 .ndo_do_ioctl = mv643xx_eth_ioctl,
2852 .ndo_change_mtu = mv643xx_eth_change_mtu,
2853 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2854 .ndo_get_stats = mv643xx_eth_get_stats,
2855 #ifdef CONFIG_NET_POLL_CONTROLLER
2856 .ndo_poll_controller = mv643xx_eth_netpoll,
2857 #endif
2858 };
2859
2860 static int mv643xx_eth_probe(struct platform_device *pdev)
2861 {
2862 struct mv643xx_eth_platform_data *pd;
2863 struct mv643xx_eth_private *mp;
2864 struct net_device *dev;
2865 struct resource *res;
2866 int err;
2867
2868 pd = pdev->dev.platform_data;
2869 if (pd == NULL) {
2870 dev_printk(KERN_ERR, &pdev->dev,
2871 "no mv643xx_eth_platform_data\n");
2872 return -ENODEV;
2873 }
2874
2875 if (pd->shared == NULL) {
2876 dev_printk(KERN_ERR, &pdev->dev,
2877 "no mv643xx_eth_platform_data->shared\n");
2878 return -ENODEV;
2879 }
2880
2881 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2882 if (!dev)
2883 return -ENOMEM;
2884
2885 mp = netdev_priv(dev);
2886 platform_set_drvdata(pdev, mp);
2887
2888 mp->shared = platform_get_drvdata(pd->shared);
2889 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2890 mp->port_num = pd->port_number;
2891
2892 mp->dev = dev;
2893
2894 set_params(mp, pd);
2895 dev->real_num_tx_queues = mp->txq_count;
2896
2897 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2898 mp->phy = phy_scan(mp, pd->phy_addr);
2899
2900 if (mp->phy != NULL)
2901 phy_init(mp, pd->speed, pd->duplex);
2902
2903 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2904
2905 init_pscr(mp, pd->speed, pd->duplex);
2906
2907
2908 mib_counters_clear(mp);
2909
2910 init_timer(&mp->mib_counters_timer);
2911 mp->mib_counters_timer.data = (unsigned long)mp;
2912 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2913 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2914 add_timer(&mp->mib_counters_timer);
2915
2916 spin_lock_init(&mp->mib_counters_lock);
2917
2918 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2919
2920 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2921
2922 init_timer(&mp->rx_oom);
2923 mp->rx_oom.data = (unsigned long)mp;
2924 mp->rx_oom.function = oom_timer_wrapper;
2925
2926
2927 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2928 BUG_ON(!res);
2929 dev->irq = res->start;
2930
2931 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2932
2933 dev->watchdog_timeo = 2 * HZ;
2934 dev->base_addr = 0;
2935
2936 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2937 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2938
2939 SET_NETDEV_DEV(dev, &pdev->dev);
2940
2941 if (mp->shared->win_protect)
2942 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2943
2944 netif_carrier_off(dev);
2945
2946 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2947
2948 set_rx_coal(mp, 250);
2949 set_tx_coal(mp, 0);
2950
2951 err = register_netdev(dev);
2952 if (err)
2953 goto out;
2954
2955 dev_printk(KERN_NOTICE, &dev->dev, "port %d with MAC address %pM\n",
2956 mp->port_num, dev->dev_addr);
2957
2958 if (mp->tx_desc_sram_size > 0)
2959 dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
2960
2961 return 0;
2962
2963 out:
2964 free_netdev(dev);
2965
2966 return err;
2967 }
2968
2969 static int mv643xx_eth_remove(struct platform_device *pdev)
2970 {
2971 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2972
2973 unregister_netdev(mp->dev);
2974 if (mp->phy != NULL)
2975 phy_detach(mp->phy);
2976 flush_scheduled_work();
2977 free_netdev(mp->dev);
2978
2979 platform_set_drvdata(pdev, NULL);
2980
2981 return 0;
2982 }
2983
2984 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2985 {
2986 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2987
2988 /* Mask all interrupts on ethernet port */
2989 wrlp(mp, INT_MASK, 0);
2990 rdlp(mp, INT_MASK);
2991
2992 if (netif_running(mp->dev))
2993 port_reset(mp);
2994 }
2995
2996 static struct platform_driver mv643xx_eth_driver = {
2997 .probe = mv643xx_eth_probe,
2998 .remove = mv643xx_eth_remove,
2999 .shutdown = mv643xx_eth_shutdown,
3000 .driver = {
3001 .name = MV643XX_ETH_NAME,
3002 .owner = THIS_MODULE,
3003 },
3004 };
3005
3006 static int __init mv643xx_eth_init_module(void)
3007 {
3008 int rc;
3009
3010 rc = platform_driver_register(&mv643xx_eth_shared_driver);
3011 if (!rc) {
3012 rc = platform_driver_register(&mv643xx_eth_driver);
3013 if (rc)
3014 platform_driver_unregister(&mv643xx_eth_shared_driver);
3015 }
3016
3017 return rc;
3018 }
3019 module_init(mv643xx_eth_init_module);
3020
3021 static void __exit mv643xx_eth_cleanup_module(void)
3022 {
3023 platform_driver_unregister(&mv643xx_eth_driver);
3024 platform_driver_unregister(&mv643xx_eth_shared_driver);
3025 }
3026 module_exit(mv643xx_eth_cleanup_module);
3027
3028 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3029 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3030 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3031 MODULE_LICENSE("GPL");
3032 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3033 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux kernel - Deliverables
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