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Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stable
[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 int tx_csum_limit;
293 };
294
295 #define TX_BW_CONTROL_ABSENT 0
296 #define TX_BW_CONTROL_OLD_LAYOUT 1
297 #define TX_BW_CONTROL_NEW_LAYOUT 2
298
299 static int mv643xx_eth_open(struct net_device *dev);
300 static int mv643xx_eth_stop(struct net_device *dev);
301
302
303 /* per-port *****************************************************************/
304 struct mib_counters {
305 u64 good_octets_received;
306 u32 bad_octets_received;
307 u32 internal_mac_transmit_err;
308 u32 good_frames_received;
309 u32 bad_frames_received;
310 u32 broadcast_frames_received;
311 u32 multicast_frames_received;
312 u32 frames_64_octets;
313 u32 frames_65_to_127_octets;
314 u32 frames_128_to_255_octets;
315 u32 frames_256_to_511_octets;
316 u32 frames_512_to_1023_octets;
317 u32 frames_1024_to_max_octets;
318 u64 good_octets_sent;
319 u32 good_frames_sent;
320 u32 excessive_collision;
321 u32 multicast_frames_sent;
322 u32 broadcast_frames_sent;
323 u32 unrec_mac_control_received;
324 u32 fc_sent;
325 u32 good_fc_received;
326 u32 bad_fc_received;
327 u32 undersize_received;
328 u32 fragments_received;
329 u32 oversize_received;
330 u32 jabber_received;
331 u32 mac_receive_error;
332 u32 bad_crc_event;
333 u32 collision;
334 u32 late_collision;
335 };
336
337 struct lro_counters {
338 u32 lro_aggregated;
339 u32 lro_flushed;
340 u32 lro_no_desc;
341 };
342
343 struct rx_queue {
344 int index;
345
346 int rx_ring_size;
347
348 int rx_desc_count;
349 int rx_curr_desc;
350 int rx_used_desc;
351
352 struct rx_desc *rx_desc_area;
353 dma_addr_t rx_desc_dma;
354 int rx_desc_area_size;
355 struct sk_buff **rx_skb;
356
357 struct net_lro_mgr lro_mgr;
358 struct net_lro_desc lro_arr[8];
359 };
360
361 struct tx_queue {
362 int index;
363
364 int tx_ring_size;
365
366 int tx_desc_count;
367 int tx_curr_desc;
368 int tx_used_desc;
369
370 struct tx_desc *tx_desc_area;
371 dma_addr_t tx_desc_dma;
372 int tx_desc_area_size;
373
374 struct sk_buff_head tx_skb;
375
376 unsigned long tx_packets;
377 unsigned long tx_bytes;
378 unsigned long tx_dropped;
379 };
380
381 struct mv643xx_eth_private {
382 struct mv643xx_eth_shared_private *shared;
383 void __iomem *base;
384 int port_num;
385
386 struct net_device *dev;
387
388 struct phy_device *phy;
389
390 struct timer_list mib_counters_timer;
391 spinlock_t mib_counters_lock;
392 struct mib_counters mib_counters;
393
394 struct lro_counters lro_counters;
395
396 struct work_struct tx_timeout_task;
397
398 struct napi_struct napi;
399 u32 int_mask;
400 u8 oom;
401 u8 work_link;
402 u8 work_tx;
403 u8 work_tx_end;
404 u8 work_rx;
405 u8 work_rx_refill;
406
407 int skb_size;
408 struct sk_buff_head rx_recycle;
409
410 /*
411 * RX state.
412 */
413 int rx_ring_size;
414 unsigned long rx_desc_sram_addr;
415 int rx_desc_sram_size;
416 int rxq_count;
417 struct timer_list rx_oom;
418 struct rx_queue rxq[8];
419
420 /*
421 * TX state.
422 */
423 int tx_ring_size;
424 unsigned long tx_desc_sram_addr;
425 int tx_desc_sram_size;
426 int txq_count;
427 struct tx_queue txq[8];
428 };
429
430
431 /* port register accessors **************************************************/
432 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
433 {
434 return readl(mp->shared->base + offset);
435 }
436
437 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
438 {
439 return readl(mp->base + offset);
440 }
441
442 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
443 {
444 writel(data, mp->shared->base + offset);
445 }
446
447 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
448 {
449 writel(data, mp->base + offset);
450 }
451
452
453 /* rxq/txq helper functions *************************************************/
454 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
455 {
456 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
457 }
458
459 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
460 {
461 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
462 }
463
464 static void rxq_enable(struct rx_queue *rxq)
465 {
466 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
467 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
468 }
469
470 static void rxq_disable(struct rx_queue *rxq)
471 {
472 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
473 u8 mask = 1 << rxq->index;
474
475 wrlp(mp, RXQ_COMMAND, mask << 8);
476 while (rdlp(mp, RXQ_COMMAND) & mask)
477 udelay(10);
478 }
479
480 static void txq_reset_hw_ptr(struct tx_queue *txq)
481 {
482 struct mv643xx_eth_private *mp = txq_to_mp(txq);
483 u32 addr;
484
485 addr = (u32)txq->tx_desc_dma;
486 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
487 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
488 }
489
490 static void txq_enable(struct tx_queue *txq)
491 {
492 struct mv643xx_eth_private *mp = txq_to_mp(txq);
493 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
494 }
495
496 static void txq_disable(struct tx_queue *txq)
497 {
498 struct mv643xx_eth_private *mp = txq_to_mp(txq);
499 u8 mask = 1 << txq->index;
500
501 wrlp(mp, TXQ_COMMAND, mask << 8);
502 while (rdlp(mp, TXQ_COMMAND) & mask)
503 udelay(10);
504 }
505
506 static void txq_maybe_wake(struct tx_queue *txq)
507 {
508 struct mv643xx_eth_private *mp = txq_to_mp(txq);
509 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
510
511 if (netif_tx_queue_stopped(nq)) {
512 __netif_tx_lock(nq, smp_processor_id());
513 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1)
514 netif_tx_wake_queue(nq);
515 __netif_tx_unlock(nq);
516 }
517 }
518
519
520 /* rx napi ******************************************************************/
521 static int
522 mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph,
523 u64 *hdr_flags, void *priv)
524 {
525 unsigned long cmd_sts = (unsigned long)priv;
526
527 /*
528 * Make sure that this packet is Ethernet II, is not VLAN
529 * tagged, is IPv4, has a valid IP header, and is TCP.
530 */
531 if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
532 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK |
533 RX_PKT_IS_VLAN_TAGGED)) !=
534 (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
535 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4))
536 return -1;
537
538 skb_reset_network_header(skb);
539 skb_set_transport_header(skb, ip_hdrlen(skb));
540 *iphdr = ip_hdr(skb);
541 *tcph = tcp_hdr(skb);
542 *hdr_flags = LRO_IPV4 | LRO_TCP;
543
544 return 0;
545 }
546
547 static int rxq_process(struct rx_queue *rxq, int budget)
548 {
549 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
550 struct net_device_stats *stats = &mp->dev->stats;
551 int lro_flush_needed;
552 int rx;
553
554 lro_flush_needed = 0;
555 rx = 0;
556 while (rx < budget && rxq->rx_desc_count) {
557 struct rx_desc *rx_desc;
558 unsigned int cmd_sts;
559 struct sk_buff *skb;
560 u16 byte_cnt;
561
562 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
563
564 cmd_sts = rx_desc->cmd_sts;
565 if (cmd_sts & BUFFER_OWNED_BY_DMA)
566 break;
567 rmb();
568
569 skb = rxq->rx_skb[rxq->rx_curr_desc];
570 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
571
572 rxq->rx_curr_desc++;
573 if (rxq->rx_curr_desc == rxq->rx_ring_size)
574 rxq->rx_curr_desc = 0;
575
576 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
577 rx_desc->buf_size, DMA_FROM_DEVICE);
578 rxq->rx_desc_count--;
579 rx++;
580
581 mp->work_rx_refill |= 1 << rxq->index;
582
583 byte_cnt = rx_desc->byte_cnt;
584
585 /*
586 * Update statistics.
587 *
588 * Note that the descriptor byte count includes 2 dummy
589 * bytes automatically inserted by the hardware at the
590 * start of the packet (which we don't count), and a 4
591 * byte CRC at the end of the packet (which we do count).
592 */
593 stats->rx_packets++;
594 stats->rx_bytes += byte_cnt - 2;
595
596 /*
597 * In case we received a packet without first / last bits
598 * on, or the error summary bit is set, the packet needs
599 * to be dropped.
600 */
601 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
602 != (RX_FIRST_DESC | RX_LAST_DESC))
603 goto err;
604
605 /*
606 * The -4 is for the CRC in the trailer of the
607 * received packet
608 */
609 skb_put(skb, byte_cnt - 2 - 4);
610
611 if (cmd_sts & LAYER_4_CHECKSUM_OK)
612 skb->ip_summed = CHECKSUM_UNNECESSARY;
613 skb->protocol = eth_type_trans(skb, mp->dev);
614
615 if (skb->dev->features & NETIF_F_LRO &&
616 skb->ip_summed == CHECKSUM_UNNECESSARY) {
617 lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts);
618 lro_flush_needed = 1;
619 } else
620 netif_receive_skb(skb);
621
622 continue;
623
624 err:
625 stats->rx_dropped++;
626
627 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
628 (RX_FIRST_DESC | RX_LAST_DESC)) {
629 if (net_ratelimit())
630 dev_printk(KERN_ERR, &mp->dev->dev,
631 "received packet spanning "
632 "multiple descriptors\n");
633 }
634
635 if (cmd_sts & ERROR_SUMMARY)
636 stats->rx_errors++;
637
638 dev_kfree_skb(skb);
639 }
640
641 if (lro_flush_needed)
642 lro_flush_all(&rxq->lro_mgr);
643
644 if (rx < budget)
645 mp->work_rx &= ~(1 << rxq->index);
646
647 return rx;
648 }
649
650 static int rxq_refill(struct rx_queue *rxq, int budget)
651 {
652 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
653 int refilled;
654
655 refilled = 0;
656 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
657 struct sk_buff *skb;
658 int rx;
659 struct rx_desc *rx_desc;
660 int size;
661
662 skb = __skb_dequeue(&mp->rx_recycle);
663 if (skb == NULL)
664 skb = dev_alloc_skb(mp->skb_size);
665
666 if (skb == NULL) {
667 mp->oom = 1;
668 goto oom;
669 }
670
671 if (SKB_DMA_REALIGN)
672 skb_reserve(skb, SKB_DMA_REALIGN);
673
674 refilled++;
675 rxq->rx_desc_count++;
676
677 rx = rxq->rx_used_desc++;
678 if (rxq->rx_used_desc == rxq->rx_ring_size)
679 rxq->rx_used_desc = 0;
680
681 rx_desc = rxq->rx_desc_area + rx;
682
683 size = skb->end - skb->data;
684 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent,
685 skb->data, size,
686 DMA_FROM_DEVICE);
687 rx_desc->buf_size = size;
688 rxq->rx_skb[rx] = skb;
689 wmb();
690 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
691 wmb();
692
693 /*
694 * The hardware automatically prepends 2 bytes of
695 * dummy data to each received packet, so that the
696 * IP header ends up 16-byte aligned.
697 */
698 skb_reserve(skb, 2);
699 }
700
701 if (refilled < budget)
702 mp->work_rx_refill &= ~(1 << rxq->index);
703
704 oom:
705 return refilled;
706 }
707
708
709 /* tx ***********************************************************************/
710 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
711 {
712 int frag;
713
714 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
715 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
716 if (fragp->size <= 8 && fragp->page_offset & 7)
717 return 1;
718 }
719
720 return 0;
721 }
722
723 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
724 {
725 struct mv643xx_eth_private *mp = txq_to_mp(txq);
726 int nr_frags = skb_shinfo(skb)->nr_frags;
727 int frag;
728
729 for (frag = 0; frag < nr_frags; frag++) {
730 skb_frag_t *this_frag;
731 int tx_index;
732 struct tx_desc *desc;
733
734 this_frag = &skb_shinfo(skb)->frags[frag];
735 tx_index = txq->tx_curr_desc++;
736 if (txq->tx_curr_desc == txq->tx_ring_size)
737 txq->tx_curr_desc = 0;
738 desc = &txq->tx_desc_area[tx_index];
739
740 /*
741 * The last fragment will generate an interrupt
742 * which will free the skb on TX completion.
743 */
744 if (frag == nr_frags - 1) {
745 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
746 ZERO_PADDING | TX_LAST_DESC |
747 TX_ENABLE_INTERRUPT;
748 } else {
749 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
750 }
751
752 desc->l4i_chk = 0;
753 desc->byte_cnt = this_frag->size;
754 desc->buf_ptr = dma_map_page(mp->dev->dev.parent,
755 this_frag->page,
756 this_frag->page_offset,
757 this_frag->size, DMA_TO_DEVICE);
758 }
759 }
760
761 static inline __be16 sum16_as_be(__sum16 sum)
762 {
763 return (__force __be16)sum;
764 }
765
766 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
767 {
768 struct mv643xx_eth_private *mp = txq_to_mp(txq);
769 int nr_frags = skb_shinfo(skb)->nr_frags;
770 int tx_index;
771 struct tx_desc *desc;
772 u32 cmd_sts;
773 u16 l4i_chk;
774 int length;
775
776 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
777 l4i_chk = 0;
778
779 if (skb->ip_summed == CHECKSUM_PARTIAL) {
780 int hdr_len;
781 int tag_bytes;
782
783 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
784 skb->protocol != htons(ETH_P_8021Q));
785
786 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
787 tag_bytes = hdr_len - ETH_HLEN;
788 if (skb->len - hdr_len > mp->shared->tx_csum_limit ||
789 unlikely(tag_bytes & ~12)) {
790 if (skb_checksum_help(skb) == 0)
791 goto no_csum;
792 kfree_skb(skb);
793 return 1;
794 }
795
796 if (tag_bytes & 4)
797 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
798 if (tag_bytes & 8)
799 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
800
801 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
802 GEN_IP_V4_CHECKSUM |
803 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
804
805 switch (ip_hdr(skb)->protocol) {
806 case IPPROTO_UDP:
807 cmd_sts |= UDP_FRAME;
808 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
809 break;
810 case IPPROTO_TCP:
811 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
812 break;
813 default:
814 BUG();
815 }
816 } else {
817 no_csum:
818 /* Errata BTS #50, IHL must be 5 if no HW checksum */
819 cmd_sts |= 5 << TX_IHL_SHIFT;
820 }
821
822 tx_index = txq->tx_curr_desc++;
823 if (txq->tx_curr_desc == txq->tx_ring_size)
824 txq->tx_curr_desc = 0;
825 desc = &txq->tx_desc_area[tx_index];
826
827 if (nr_frags) {
828 txq_submit_frag_skb(txq, skb);
829 length = skb_headlen(skb);
830 } else {
831 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
832 length = skb->len;
833 }
834
835 desc->l4i_chk = l4i_chk;
836 desc->byte_cnt = length;
837 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
838 length, DMA_TO_DEVICE);
839
840 __skb_queue_tail(&txq->tx_skb, skb);
841
842 /* ensure all other descriptors are written before first cmd_sts */
843 wmb();
844 desc->cmd_sts = cmd_sts;
845
846 /* clear TX_END status */
847 mp->work_tx_end &= ~(1 << txq->index);
848
849 /* ensure all descriptors are written before poking hardware */
850 wmb();
851 txq_enable(txq);
852
853 txq->tx_desc_count += nr_frags + 1;
854
855 return 0;
856 }
857
858 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
859 {
860 struct mv643xx_eth_private *mp = netdev_priv(dev);
861 int queue;
862 struct tx_queue *txq;
863 struct netdev_queue *nq;
864
865 queue = skb_get_queue_mapping(skb);
866 txq = mp->txq + queue;
867 nq = netdev_get_tx_queue(dev, queue);
868
869 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
870 txq->tx_dropped++;
871 dev_printk(KERN_DEBUG, &dev->dev,
872 "failed to linearize skb with tiny "
873 "unaligned fragment\n");
874 return NETDEV_TX_BUSY;
875 }
876
877 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
878 if (net_ratelimit())
879 dev_printk(KERN_ERR, &dev->dev, "tx queue full?!\n");
880 kfree_skb(skb);
881 return NETDEV_TX_OK;
882 }
883
884 if (!txq_submit_skb(txq, skb)) {
885 int entries_left;
886
887 txq->tx_bytes += skb->len;
888 txq->tx_packets++;
889
890 entries_left = txq->tx_ring_size - txq->tx_desc_count;
891 if (entries_left < MAX_SKB_FRAGS + 1)
892 netif_tx_stop_queue(nq);
893 }
894
895 return NETDEV_TX_OK;
896 }
897
898
899 /* tx napi ******************************************************************/
900 static void txq_kick(struct tx_queue *txq)
901 {
902 struct mv643xx_eth_private *mp = txq_to_mp(txq);
903 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
904 u32 hw_desc_ptr;
905 u32 expected_ptr;
906
907 __netif_tx_lock(nq, smp_processor_id());
908
909 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
910 goto out;
911
912 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
913 expected_ptr = (u32)txq->tx_desc_dma +
914 txq->tx_curr_desc * sizeof(struct tx_desc);
915
916 if (hw_desc_ptr != expected_ptr)
917 txq_enable(txq);
918
919 out:
920 __netif_tx_unlock(nq);
921
922 mp->work_tx_end &= ~(1 << txq->index);
923 }
924
925 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
926 {
927 struct mv643xx_eth_private *mp = txq_to_mp(txq);
928 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
929 int reclaimed;
930
931 __netif_tx_lock(nq, smp_processor_id());
932
933 reclaimed = 0;
934 while (reclaimed < budget && txq->tx_desc_count > 0) {
935 int tx_index;
936 struct tx_desc *desc;
937 u32 cmd_sts;
938 struct sk_buff *skb;
939
940 tx_index = txq->tx_used_desc;
941 desc = &txq->tx_desc_area[tx_index];
942 cmd_sts = desc->cmd_sts;
943
944 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
945 if (!force)
946 break;
947 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
948 }
949
950 txq->tx_used_desc = tx_index + 1;
951 if (txq->tx_used_desc == txq->tx_ring_size)
952 txq->tx_used_desc = 0;
953
954 reclaimed++;
955 txq->tx_desc_count--;
956
957 skb = NULL;
958 if (cmd_sts & TX_LAST_DESC)
959 skb = __skb_dequeue(&txq->tx_skb);
960
961 if (cmd_sts & ERROR_SUMMARY) {
962 dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n");
963 mp->dev->stats.tx_errors++;
964 }
965
966 if (cmd_sts & TX_FIRST_DESC) {
967 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
968 desc->byte_cnt, DMA_TO_DEVICE);
969 } else {
970 dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr,
971 desc->byte_cnt, DMA_TO_DEVICE);
972 }
973
974 if (skb != NULL) {
975 if (skb_queue_len(&mp->rx_recycle) <
976 mp->rx_ring_size &&
977 skb_recycle_check(skb, mp->skb_size))
978 __skb_queue_head(&mp->rx_recycle, skb);
979 else
980 dev_kfree_skb(skb);
981 }
982 }
983
984 __netif_tx_unlock(nq);
985
986 if (reclaimed < budget)
987 mp->work_tx &= ~(1 << txq->index);
988
989 return reclaimed;
990 }
991
992
993 /* tx rate control **********************************************************/
994 /*
995 * Set total maximum TX rate (shared by all TX queues for this port)
996 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
997 */
998 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
999 {
1000 int token_rate;
1001 int mtu;
1002 int bucket_size;
1003
1004 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1005 if (token_rate > 1023)
1006 token_rate = 1023;
1007
1008 mtu = (mp->dev->mtu + 255) >> 8;
1009 if (mtu > 63)
1010 mtu = 63;
1011
1012 bucket_size = (burst + 255) >> 8;
1013 if (bucket_size > 65535)
1014 bucket_size = 65535;
1015
1016 switch (mp->shared->tx_bw_control) {
1017 case TX_BW_CONTROL_OLD_LAYOUT:
1018 wrlp(mp, TX_BW_RATE, token_rate);
1019 wrlp(mp, TX_BW_MTU, mtu);
1020 wrlp(mp, TX_BW_BURST, bucket_size);
1021 break;
1022 case TX_BW_CONTROL_NEW_LAYOUT:
1023 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1024 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1025 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1026 break;
1027 }
1028 }
1029
1030 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1031 {
1032 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1033 int token_rate;
1034 int bucket_size;
1035
1036 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1037 if (token_rate > 1023)
1038 token_rate = 1023;
1039
1040 bucket_size = (burst + 255) >> 8;
1041 if (bucket_size > 65535)
1042 bucket_size = 65535;
1043
1044 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1045 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1046 }
1047
1048 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1049 {
1050 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1051 int off;
1052 u32 val;
1053
1054 /*
1055 * Turn on fixed priority mode.
1056 */
1057 off = 0;
1058 switch (mp->shared->tx_bw_control) {
1059 case TX_BW_CONTROL_OLD_LAYOUT:
1060 off = TXQ_FIX_PRIO_CONF;
1061 break;
1062 case TX_BW_CONTROL_NEW_LAYOUT:
1063 off = TXQ_FIX_PRIO_CONF_MOVED;
1064 break;
1065 }
1066
1067 if (off) {
1068 val = rdlp(mp, off);
1069 val |= 1 << txq->index;
1070 wrlp(mp, off, val);
1071 }
1072 }
1073
1074
1075 /* mii management interface *************************************************/
1076 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1077 {
1078 struct mv643xx_eth_shared_private *msp = dev_id;
1079
1080 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1081 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1082 wake_up(&msp->smi_busy_wait);
1083 return IRQ_HANDLED;
1084 }
1085
1086 return IRQ_NONE;
1087 }
1088
1089 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1090 {
1091 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1092 }
1093
1094 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1095 {
1096 if (msp->err_interrupt == NO_IRQ) {
1097 int i;
1098
1099 for (i = 0; !smi_is_done(msp); i++) {
1100 if (i == 10)
1101 return -ETIMEDOUT;
1102 msleep(10);
1103 }
1104
1105 return 0;
1106 }
1107
1108 if (!smi_is_done(msp)) {
1109 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1110 msecs_to_jiffies(100));
1111 if (!smi_is_done(msp))
1112 return -ETIMEDOUT;
1113 }
1114
1115 return 0;
1116 }
1117
1118 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1119 {
1120 struct mv643xx_eth_shared_private *msp = bus->priv;
1121 void __iomem *smi_reg = msp->base + SMI_REG;
1122 int ret;
1123
1124 if (smi_wait_ready(msp)) {
1125 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1126 return -ETIMEDOUT;
1127 }
1128
1129 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
1130
1131 if (smi_wait_ready(msp)) {
1132 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1133 return -ETIMEDOUT;
1134 }
1135
1136 ret = readl(smi_reg);
1137 if (!(ret & SMI_READ_VALID)) {
1138 printk(KERN_WARNING "mv643xx_eth: SMI bus read not valid\n");
1139 return -ENODEV;
1140 }
1141
1142 return ret & 0xffff;
1143 }
1144
1145 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1146 {
1147 struct mv643xx_eth_shared_private *msp = bus->priv;
1148 void __iomem *smi_reg = msp->base + SMI_REG;
1149
1150 if (smi_wait_ready(msp)) {
1151 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1152 return -ETIMEDOUT;
1153 }
1154
1155 writel(SMI_OPCODE_WRITE | (reg << 21) |
1156 (addr << 16) | (val & 0xffff), smi_reg);
1157
1158 if (smi_wait_ready(msp)) {
1159 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1160 return -ETIMEDOUT;
1161 }
1162
1163 return 0;
1164 }
1165
1166
1167 /* statistics ***************************************************************/
1168 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1169 {
1170 struct mv643xx_eth_private *mp = netdev_priv(dev);
1171 struct net_device_stats *stats = &dev->stats;
1172 unsigned long tx_packets = 0;
1173 unsigned long tx_bytes = 0;
1174 unsigned long tx_dropped = 0;
1175 int i;
1176
1177 for (i = 0; i < mp->txq_count; i++) {
1178 struct tx_queue *txq = mp->txq + i;
1179
1180 tx_packets += txq->tx_packets;
1181 tx_bytes += txq->tx_bytes;
1182 tx_dropped += txq->tx_dropped;
1183 }
1184
1185 stats->tx_packets = tx_packets;
1186 stats->tx_bytes = tx_bytes;
1187 stats->tx_dropped = tx_dropped;
1188
1189 return stats;
1190 }
1191
1192 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1193 {
1194 u32 lro_aggregated = 0;
1195 u32 lro_flushed = 0;
1196 u32 lro_no_desc = 0;
1197 int i;
1198
1199 for (i = 0; i < mp->rxq_count; i++) {
1200 struct rx_queue *rxq = mp->rxq + i;
1201
1202 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1203 lro_flushed += rxq->lro_mgr.stats.flushed;
1204 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1205 }
1206
1207 mp->lro_counters.lro_aggregated = lro_aggregated;
1208 mp->lro_counters.lro_flushed = lro_flushed;
1209 mp->lro_counters.lro_no_desc = lro_no_desc;
1210 }
1211
1212 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1213 {
1214 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1215 }
1216
1217 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1218 {
1219 int i;
1220
1221 for (i = 0; i < 0x80; i += 4)
1222 mib_read(mp, i);
1223 }
1224
1225 static void mib_counters_update(struct mv643xx_eth_private *mp)
1226 {
1227 struct mib_counters *p = &mp->mib_counters;
1228
1229 spin_lock_bh(&mp->mib_counters_lock);
1230 p->good_octets_received += mib_read(mp, 0x00);
1231 p->bad_octets_received += mib_read(mp, 0x08);
1232 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1233 p->good_frames_received += mib_read(mp, 0x10);
1234 p->bad_frames_received += mib_read(mp, 0x14);
1235 p->broadcast_frames_received += mib_read(mp, 0x18);
1236 p->multicast_frames_received += mib_read(mp, 0x1c);
1237 p->frames_64_octets += mib_read(mp, 0x20);
1238 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1239 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1240 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1241 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1242 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1243 p->good_octets_sent += mib_read(mp, 0x38);
1244 p->good_frames_sent += mib_read(mp, 0x40);
1245 p->excessive_collision += mib_read(mp, 0x44);
1246 p->multicast_frames_sent += mib_read(mp, 0x48);
1247 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1248 p->unrec_mac_control_received += mib_read(mp, 0x50);
1249 p->fc_sent += mib_read(mp, 0x54);
1250 p->good_fc_received += mib_read(mp, 0x58);
1251 p->bad_fc_received += mib_read(mp, 0x5c);
1252 p->undersize_received += mib_read(mp, 0x60);
1253 p->fragments_received += mib_read(mp, 0x64);
1254 p->oversize_received += mib_read(mp, 0x68);
1255 p->jabber_received += mib_read(mp, 0x6c);
1256 p->mac_receive_error += mib_read(mp, 0x70);
1257 p->bad_crc_event += mib_read(mp, 0x74);
1258 p->collision += mib_read(mp, 0x78);
1259 p->late_collision += mib_read(mp, 0x7c);
1260 spin_unlock_bh(&mp->mib_counters_lock);
1261
1262 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1263 }
1264
1265 static void mib_counters_timer_wrapper(unsigned long _mp)
1266 {
1267 struct mv643xx_eth_private *mp = (void *)_mp;
1268
1269 mib_counters_update(mp);
1270 }
1271
1272
1273 /* interrupt coalescing *****************************************************/
1274 /*
1275 * Hardware coalescing parameters are set in units of 64 t_clk
1276 * cycles. I.e.:
1277 *
1278 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1279 *
1280 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1281 *
1282 * In the ->set*() methods, we round the computed register value
1283 * to the nearest integer.
1284 */
1285 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1286 {
1287 u32 val = rdlp(mp, SDMA_CONFIG);
1288 u64 temp;
1289
1290 if (mp->shared->extended_rx_coal_limit)
1291 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1292 else
1293 temp = (val & 0x003fff00) >> 8;
1294
1295 temp *= 64000000;
1296 do_div(temp, mp->shared->t_clk);
1297
1298 return (unsigned int)temp;
1299 }
1300
1301 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1302 {
1303 u64 temp;
1304 u32 val;
1305
1306 temp = (u64)usec * mp->shared->t_clk;
1307 temp += 31999999;
1308 do_div(temp, 64000000);
1309
1310 val = rdlp(mp, SDMA_CONFIG);
1311 if (mp->shared->extended_rx_coal_limit) {
1312 if (temp > 0xffff)
1313 temp = 0xffff;
1314 val &= ~0x023fff80;
1315 val |= (temp & 0x8000) << 10;
1316 val |= (temp & 0x7fff) << 7;
1317 } else {
1318 if (temp > 0x3fff)
1319 temp = 0x3fff;
1320 val &= ~0x003fff00;
1321 val |= (temp & 0x3fff) << 8;
1322 }
1323 wrlp(mp, SDMA_CONFIG, val);
1324 }
1325
1326 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1327 {
1328 u64 temp;
1329
1330 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1331 temp *= 64000000;
1332 do_div(temp, mp->shared->t_clk);
1333
1334 return (unsigned int)temp;
1335 }
1336
1337 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1338 {
1339 u64 temp;
1340
1341 temp = (u64)usec * mp->shared->t_clk;
1342 temp += 31999999;
1343 do_div(temp, 64000000);
1344
1345 if (temp > 0x3fff)
1346 temp = 0x3fff;
1347
1348 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1349 }
1350
1351
1352 /* ethtool ******************************************************************/
1353 struct mv643xx_eth_stats {
1354 char stat_string[ETH_GSTRING_LEN];
1355 int sizeof_stat;
1356 int netdev_off;
1357 int mp_off;
1358 };
1359
1360 #define SSTAT(m) \
1361 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1362 offsetof(struct net_device, stats.m), -1 }
1363
1364 #define MIBSTAT(m) \
1365 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1366 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1367
1368 #define LROSTAT(m) \
1369 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1370 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1371
1372 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1373 SSTAT(rx_packets),
1374 SSTAT(tx_packets),
1375 SSTAT(rx_bytes),
1376 SSTAT(tx_bytes),
1377 SSTAT(rx_errors),
1378 SSTAT(tx_errors),
1379 SSTAT(rx_dropped),
1380 SSTAT(tx_dropped),
1381 MIBSTAT(good_octets_received),
1382 MIBSTAT(bad_octets_received),
1383 MIBSTAT(internal_mac_transmit_err),
1384 MIBSTAT(good_frames_received),
1385 MIBSTAT(bad_frames_received),
1386 MIBSTAT(broadcast_frames_received),
1387 MIBSTAT(multicast_frames_received),
1388 MIBSTAT(frames_64_octets),
1389 MIBSTAT(frames_65_to_127_octets),
1390 MIBSTAT(frames_128_to_255_octets),
1391 MIBSTAT(frames_256_to_511_octets),
1392 MIBSTAT(frames_512_to_1023_octets),
1393 MIBSTAT(frames_1024_to_max_octets),
1394 MIBSTAT(good_octets_sent),
1395 MIBSTAT(good_frames_sent),
1396 MIBSTAT(excessive_collision),
1397 MIBSTAT(multicast_frames_sent),
1398 MIBSTAT(broadcast_frames_sent),
1399 MIBSTAT(unrec_mac_control_received),
1400 MIBSTAT(fc_sent),
1401 MIBSTAT(good_fc_received),
1402 MIBSTAT(bad_fc_received),
1403 MIBSTAT(undersize_received),
1404 MIBSTAT(fragments_received),
1405 MIBSTAT(oversize_received),
1406 MIBSTAT(jabber_received),
1407 MIBSTAT(mac_receive_error),
1408 MIBSTAT(bad_crc_event),
1409 MIBSTAT(collision),
1410 MIBSTAT(late_collision),
1411 LROSTAT(lro_aggregated),
1412 LROSTAT(lro_flushed),
1413 LROSTAT(lro_no_desc),
1414 };
1415
1416 static int
1417 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1418 struct ethtool_cmd *cmd)
1419 {
1420 int err;
1421
1422 err = phy_read_status(mp->phy);
1423 if (err == 0)
1424 err = phy_ethtool_gset(mp->phy, cmd);
1425
1426 /*
1427 * The MAC does not support 1000baseT_Half.
1428 */
1429 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1430 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1431
1432 return err;
1433 }
1434
1435 static int
1436 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1437 struct ethtool_cmd *cmd)
1438 {
1439 u32 port_status;
1440
1441 port_status = rdlp(mp, PORT_STATUS);
1442
1443 cmd->supported = SUPPORTED_MII;
1444 cmd->advertising = ADVERTISED_MII;
1445 switch (port_status & PORT_SPEED_MASK) {
1446 case PORT_SPEED_10:
1447 cmd->speed = SPEED_10;
1448 break;
1449 case PORT_SPEED_100:
1450 cmd->speed = SPEED_100;
1451 break;
1452 case PORT_SPEED_1000:
1453 cmd->speed = SPEED_1000;
1454 break;
1455 default:
1456 cmd->speed = -1;
1457 break;
1458 }
1459 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1460 cmd->port = PORT_MII;
1461 cmd->phy_address = 0;
1462 cmd->transceiver = XCVR_INTERNAL;
1463 cmd->autoneg = AUTONEG_DISABLE;
1464 cmd->maxtxpkt = 1;
1465 cmd->maxrxpkt = 1;
1466
1467 return 0;
1468 }
1469
1470 static int
1471 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1472 {
1473 struct mv643xx_eth_private *mp = netdev_priv(dev);
1474
1475 if (mp->phy != NULL)
1476 return mv643xx_eth_get_settings_phy(mp, cmd);
1477 else
1478 return mv643xx_eth_get_settings_phyless(mp, cmd);
1479 }
1480
1481 static int
1482 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1483 {
1484 struct mv643xx_eth_private *mp = netdev_priv(dev);
1485
1486 if (mp->phy == NULL)
1487 return -EINVAL;
1488
1489 /*
1490 * The MAC does not support 1000baseT_Half.
1491 */
1492 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1493
1494 return phy_ethtool_sset(mp->phy, cmd);
1495 }
1496
1497 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1498 struct ethtool_drvinfo *drvinfo)
1499 {
1500 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1501 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1502 strncpy(drvinfo->fw_version, "N/A", 32);
1503 strncpy(drvinfo->bus_info, "platform", 32);
1504 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1505 }
1506
1507 static int mv643xx_eth_nway_reset(struct net_device *dev)
1508 {
1509 struct mv643xx_eth_private *mp = netdev_priv(dev);
1510
1511 if (mp->phy == NULL)
1512 return -EINVAL;
1513
1514 return genphy_restart_aneg(mp->phy);
1515 }
1516
1517 static int
1518 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1519 {
1520 struct mv643xx_eth_private *mp = netdev_priv(dev);
1521
1522 ec->rx_coalesce_usecs = get_rx_coal(mp);
1523 ec->tx_coalesce_usecs = get_tx_coal(mp);
1524
1525 return 0;
1526 }
1527
1528 static int
1529 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1530 {
1531 struct mv643xx_eth_private *mp = netdev_priv(dev);
1532
1533 set_rx_coal(mp, ec->rx_coalesce_usecs);
1534 set_tx_coal(mp, ec->tx_coalesce_usecs);
1535
1536 return 0;
1537 }
1538
1539 static void
1540 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1541 {
1542 struct mv643xx_eth_private *mp = netdev_priv(dev);
1543
1544 er->rx_max_pending = 4096;
1545 er->tx_max_pending = 4096;
1546 er->rx_mini_max_pending = 0;
1547 er->rx_jumbo_max_pending = 0;
1548
1549 er->rx_pending = mp->rx_ring_size;
1550 er->tx_pending = mp->tx_ring_size;
1551 er->rx_mini_pending = 0;
1552 er->rx_jumbo_pending = 0;
1553 }
1554
1555 static int
1556 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1557 {
1558 struct mv643xx_eth_private *mp = netdev_priv(dev);
1559
1560 if (er->rx_mini_pending || er->rx_jumbo_pending)
1561 return -EINVAL;
1562
1563 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1564 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1565
1566 if (netif_running(dev)) {
1567 mv643xx_eth_stop(dev);
1568 if (mv643xx_eth_open(dev)) {
1569 dev_printk(KERN_ERR, &dev->dev,
1570 "fatal error on re-opening device after "
1571 "ring param change\n");
1572 return -ENOMEM;
1573 }
1574 }
1575
1576 return 0;
1577 }
1578
1579 static u32
1580 mv643xx_eth_get_rx_csum(struct net_device *dev)
1581 {
1582 struct mv643xx_eth_private *mp = netdev_priv(dev);
1583
1584 return !!(rdlp(mp, PORT_CONFIG) & 0x02000000);
1585 }
1586
1587 static int
1588 mv643xx_eth_set_rx_csum(struct net_device *dev, u32 rx_csum)
1589 {
1590 struct mv643xx_eth_private *mp = netdev_priv(dev);
1591
1592 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1593
1594 return 0;
1595 }
1596
1597 static void mv643xx_eth_get_strings(struct net_device *dev,
1598 uint32_t stringset, uint8_t *data)
1599 {
1600 int i;
1601
1602 if (stringset == ETH_SS_STATS) {
1603 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1604 memcpy(data + i * ETH_GSTRING_LEN,
1605 mv643xx_eth_stats[i].stat_string,
1606 ETH_GSTRING_LEN);
1607 }
1608 }
1609 }
1610
1611 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1612 struct ethtool_stats *stats,
1613 uint64_t *data)
1614 {
1615 struct mv643xx_eth_private *mp = netdev_priv(dev);
1616 int i;
1617
1618 mv643xx_eth_get_stats(dev);
1619 mib_counters_update(mp);
1620 mv643xx_eth_grab_lro_stats(mp);
1621
1622 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1623 const struct mv643xx_eth_stats *stat;
1624 void *p;
1625
1626 stat = mv643xx_eth_stats + i;
1627
1628 if (stat->netdev_off >= 0)
1629 p = ((void *)mp->dev) + stat->netdev_off;
1630 else
1631 p = ((void *)mp) + stat->mp_off;
1632
1633 data[i] = (stat->sizeof_stat == 8) ?
1634 *(uint64_t *)p : *(uint32_t *)p;
1635 }
1636 }
1637
1638 static int mv643xx_eth_set_flags(struct net_device *dev, u32 data)
1639 {
1640 return ethtool_op_set_flags(dev, data, ETH_FLAG_LRO);
1641 }
1642
1643 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1644 {
1645 if (sset == ETH_SS_STATS)
1646 return ARRAY_SIZE(mv643xx_eth_stats);
1647
1648 return -EOPNOTSUPP;
1649 }
1650
1651 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1652 .get_settings = mv643xx_eth_get_settings,
1653 .set_settings = mv643xx_eth_set_settings,
1654 .get_drvinfo = mv643xx_eth_get_drvinfo,
1655 .nway_reset = mv643xx_eth_nway_reset,
1656 .get_link = ethtool_op_get_link,
1657 .get_coalesce = mv643xx_eth_get_coalesce,
1658 .set_coalesce = mv643xx_eth_set_coalesce,
1659 .get_ringparam = mv643xx_eth_get_ringparam,
1660 .set_ringparam = mv643xx_eth_set_ringparam,
1661 .get_rx_csum = mv643xx_eth_get_rx_csum,
1662 .set_rx_csum = mv643xx_eth_set_rx_csum,
1663 .set_tx_csum = ethtool_op_set_tx_csum,
1664 .set_sg = ethtool_op_set_sg,
1665 .get_strings = mv643xx_eth_get_strings,
1666 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1667 .get_flags = ethtool_op_get_flags,
1668 .set_flags = mv643xx_eth_set_flags,
1669 .get_sset_count = mv643xx_eth_get_sset_count,
1670 };
1671
1672
1673 /* address handling *********************************************************/
1674 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1675 {
1676 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1677 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1678
1679 addr[0] = (mac_h >> 24) & 0xff;
1680 addr[1] = (mac_h >> 16) & 0xff;
1681 addr[2] = (mac_h >> 8) & 0xff;
1682 addr[3] = mac_h & 0xff;
1683 addr[4] = (mac_l >> 8) & 0xff;
1684 addr[5] = mac_l & 0xff;
1685 }
1686
1687 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1688 {
1689 wrlp(mp, MAC_ADDR_HIGH,
1690 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1691 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1692 }
1693
1694 static u32 uc_addr_filter_mask(struct net_device *dev)
1695 {
1696 struct netdev_hw_addr *ha;
1697 u32 nibbles;
1698
1699 if (dev->flags & IFF_PROMISC)
1700 return 0;
1701
1702 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1703 netdev_for_each_uc_addr(ha, dev) {
1704 if (memcmp(dev->dev_addr, ha->addr, 5))
1705 return 0;
1706 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1707 return 0;
1708
1709 nibbles |= 1 << (ha->addr[5] & 0x0f);
1710 }
1711
1712 return nibbles;
1713 }
1714
1715 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1716 {
1717 struct mv643xx_eth_private *mp = netdev_priv(dev);
1718 u32 port_config;
1719 u32 nibbles;
1720 int i;
1721
1722 uc_addr_set(mp, dev->dev_addr);
1723
1724 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1725
1726 nibbles = uc_addr_filter_mask(dev);
1727 if (!nibbles) {
1728 port_config |= UNICAST_PROMISCUOUS_MODE;
1729 nibbles = 0xffff;
1730 }
1731
1732 for (i = 0; i < 16; i += 4) {
1733 int off = UNICAST_TABLE(mp->port_num) + i;
1734 u32 v;
1735
1736 v = 0;
1737 if (nibbles & 1)
1738 v |= 0x00000001;
1739 if (nibbles & 2)
1740 v |= 0x00000100;
1741 if (nibbles & 4)
1742 v |= 0x00010000;
1743 if (nibbles & 8)
1744 v |= 0x01000000;
1745 nibbles >>= 4;
1746
1747 wrl(mp, off, v);
1748 }
1749
1750 wrlp(mp, PORT_CONFIG, port_config);
1751 }
1752
1753 static int addr_crc(unsigned char *addr)
1754 {
1755 int crc = 0;
1756 int i;
1757
1758 for (i = 0; i < 6; i++) {
1759 int j;
1760
1761 crc = (crc ^ addr[i]) << 8;
1762 for (j = 7; j >= 0; j--) {
1763 if (crc & (0x100 << j))
1764 crc ^= 0x107 << j;
1765 }
1766 }
1767
1768 return crc;
1769 }
1770
1771 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1772 {
1773 struct mv643xx_eth_private *mp = netdev_priv(dev);
1774 u32 *mc_spec;
1775 u32 *mc_other;
1776 struct netdev_hw_addr *ha;
1777 int i;
1778
1779 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1780 int port_num;
1781 u32 accept;
1782
1783 oom:
1784 port_num = mp->port_num;
1785 accept = 0x01010101;
1786 for (i = 0; i < 0x100; i += 4) {
1787 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1788 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1789 }
1790 return;
1791 }
1792
1793 mc_spec = kmalloc(0x200, GFP_ATOMIC);
1794 if (mc_spec == NULL)
1795 goto oom;
1796 mc_other = mc_spec + (0x100 >> 2);
1797
1798 memset(mc_spec, 0, 0x100);
1799 memset(mc_other, 0, 0x100);
1800
1801 netdev_for_each_mc_addr(ha, dev) {
1802 u8 *a = ha->addr;
1803 u32 *table;
1804 int entry;
1805
1806 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1807 table = mc_spec;
1808 entry = a[5];
1809 } else {
1810 table = mc_other;
1811 entry = addr_crc(a);
1812 }
1813
1814 table[entry >> 2] |= 1 << (8 * (entry & 3));
1815 }
1816
1817 for (i = 0; i < 0x100; i += 4) {
1818 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]);
1819 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]);
1820 }
1821
1822 kfree(mc_spec);
1823 }
1824
1825 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1826 {
1827 mv643xx_eth_program_unicast_filter(dev);
1828 mv643xx_eth_program_multicast_filter(dev);
1829 }
1830
1831 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1832 {
1833 struct sockaddr *sa = addr;
1834
1835 if (!is_valid_ether_addr(sa->sa_data))
1836 return -EINVAL;
1837
1838 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1839
1840 netif_addr_lock_bh(dev);
1841 mv643xx_eth_program_unicast_filter(dev);
1842 netif_addr_unlock_bh(dev);
1843
1844 return 0;
1845 }
1846
1847
1848 /* rx/tx queue initialisation ***********************************************/
1849 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1850 {
1851 struct rx_queue *rxq = mp->rxq + index;
1852 struct rx_desc *rx_desc;
1853 int size;
1854 int i;
1855
1856 rxq->index = index;
1857
1858 rxq->rx_ring_size = mp->rx_ring_size;
1859
1860 rxq->rx_desc_count = 0;
1861 rxq->rx_curr_desc = 0;
1862 rxq->rx_used_desc = 0;
1863
1864 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1865
1866 if (index == 0 && size <= mp->rx_desc_sram_size) {
1867 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1868 mp->rx_desc_sram_size);
1869 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1870 } else {
1871 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1872 size, &rxq->rx_desc_dma,
1873 GFP_KERNEL);
1874 }
1875
1876 if (rxq->rx_desc_area == NULL) {
1877 dev_printk(KERN_ERR, &mp->dev->dev,
1878 "can't allocate rx ring (%d bytes)\n", size);
1879 goto out;
1880 }
1881 memset(rxq->rx_desc_area, 0, size);
1882
1883 rxq->rx_desc_area_size = size;
1884 rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1885 GFP_KERNEL);
1886 if (rxq->rx_skb == NULL) {
1887 dev_printk(KERN_ERR, &mp->dev->dev,
1888 "can't allocate rx skb ring\n");
1889 goto out_free;
1890 }
1891
1892 rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1893 for (i = 0; i < rxq->rx_ring_size; i++) {
1894 int nexti;
1895
1896 nexti = i + 1;
1897 if (nexti == rxq->rx_ring_size)
1898 nexti = 0;
1899
1900 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1901 nexti * sizeof(struct rx_desc);
1902 }
1903
1904 rxq->lro_mgr.dev = mp->dev;
1905 memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats));
1906 rxq->lro_mgr.features = LRO_F_NAPI;
1907 rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1908 rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1909 rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr);
1910 rxq->lro_mgr.max_aggr = 32;
1911 rxq->lro_mgr.frag_align_pad = 0;
1912 rxq->lro_mgr.lro_arr = rxq->lro_arr;
1913 rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header;
1914
1915 memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr));
1916
1917 return 0;
1918
1919
1920 out_free:
1921 if (index == 0 && size <= mp->rx_desc_sram_size)
1922 iounmap(rxq->rx_desc_area);
1923 else
1924 dma_free_coherent(mp->dev->dev.parent, size,
1925 rxq->rx_desc_area,
1926 rxq->rx_desc_dma);
1927
1928 out:
1929 return -ENOMEM;
1930 }
1931
1932 static void rxq_deinit(struct rx_queue *rxq)
1933 {
1934 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1935 int i;
1936
1937 rxq_disable(rxq);
1938
1939 for (i = 0; i < rxq->rx_ring_size; i++) {
1940 if (rxq->rx_skb[i]) {
1941 dev_kfree_skb(rxq->rx_skb[i]);
1942 rxq->rx_desc_count--;
1943 }
1944 }
1945
1946 if (rxq->rx_desc_count) {
1947 dev_printk(KERN_ERR, &mp->dev->dev,
1948 "error freeing rx ring -- %d skbs stuck\n",
1949 rxq->rx_desc_count);
1950 }
1951
1952 if (rxq->index == 0 &&
1953 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1954 iounmap(rxq->rx_desc_area);
1955 else
1956 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
1957 rxq->rx_desc_area, rxq->rx_desc_dma);
1958
1959 kfree(rxq->rx_skb);
1960 }
1961
1962 static int txq_init(struct mv643xx_eth_private *mp, int index)
1963 {
1964 struct tx_queue *txq = mp->txq + index;
1965 struct tx_desc *tx_desc;
1966 int size;
1967 int i;
1968
1969 txq->index = index;
1970
1971 txq->tx_ring_size = mp->tx_ring_size;
1972
1973 txq->tx_desc_count = 0;
1974 txq->tx_curr_desc = 0;
1975 txq->tx_used_desc = 0;
1976
1977 size = txq->tx_ring_size * sizeof(struct tx_desc);
1978
1979 if (index == 0 && size <= mp->tx_desc_sram_size) {
1980 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
1981 mp->tx_desc_sram_size);
1982 txq->tx_desc_dma = mp->tx_desc_sram_addr;
1983 } else {
1984 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1985 size, &txq->tx_desc_dma,
1986 GFP_KERNEL);
1987 }
1988
1989 if (txq->tx_desc_area == NULL) {
1990 dev_printk(KERN_ERR, &mp->dev->dev,
1991 "can't allocate tx ring (%d bytes)\n", size);
1992 return -ENOMEM;
1993 }
1994 memset(txq->tx_desc_area, 0, size);
1995
1996 txq->tx_desc_area_size = size;
1997
1998 tx_desc = (struct tx_desc *)txq->tx_desc_area;
1999 for (i = 0; i < txq->tx_ring_size; i++) {
2000 struct tx_desc *txd = tx_desc + i;
2001 int nexti;
2002
2003 nexti = i + 1;
2004 if (nexti == txq->tx_ring_size)
2005 nexti = 0;
2006
2007 txd->cmd_sts = 0;
2008 txd->next_desc_ptr = txq->tx_desc_dma +
2009 nexti * sizeof(struct tx_desc);
2010 }
2011
2012 skb_queue_head_init(&txq->tx_skb);
2013
2014 return 0;
2015 }
2016
2017 static void txq_deinit(struct tx_queue *txq)
2018 {
2019 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2020
2021 txq_disable(txq);
2022 txq_reclaim(txq, txq->tx_ring_size, 1);
2023
2024 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2025
2026 if (txq->index == 0 &&
2027 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2028 iounmap(txq->tx_desc_area);
2029 else
2030 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2031 txq->tx_desc_area, txq->tx_desc_dma);
2032 }
2033
2034
2035 /* netdev ops and related ***************************************************/
2036 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2037 {
2038 u32 int_cause;
2039 u32 int_cause_ext;
2040
2041 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
2042 if (int_cause == 0)
2043 return 0;
2044
2045 int_cause_ext = 0;
2046 if (int_cause & INT_EXT) {
2047 int_cause &= ~INT_EXT;
2048 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2049 }
2050
2051 if (int_cause) {
2052 wrlp(mp, INT_CAUSE, ~int_cause);
2053 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2054 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2055 mp->work_rx |= (int_cause & INT_RX) >> 2;
2056 }
2057
2058 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2059 if (int_cause_ext) {
2060 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2061 if (int_cause_ext & INT_EXT_LINK_PHY)
2062 mp->work_link = 1;
2063 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2064 }
2065
2066 return 1;
2067 }
2068
2069 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2070 {
2071 struct net_device *dev = (struct net_device *)dev_id;
2072 struct mv643xx_eth_private *mp = netdev_priv(dev);
2073
2074 if (unlikely(!mv643xx_eth_collect_events(mp)))
2075 return IRQ_NONE;
2076
2077 wrlp(mp, INT_MASK, 0);
2078 napi_schedule(&mp->napi);
2079
2080 return IRQ_HANDLED;
2081 }
2082
2083 static void handle_link_event(struct mv643xx_eth_private *mp)
2084 {
2085 struct net_device *dev = mp->dev;
2086 u32 port_status;
2087 int speed;
2088 int duplex;
2089 int fc;
2090
2091 port_status = rdlp(mp, PORT_STATUS);
2092 if (!(port_status & LINK_UP)) {
2093 if (netif_carrier_ok(dev)) {
2094 int i;
2095
2096 printk(KERN_INFO "%s: link down\n", dev->name);
2097
2098 netif_carrier_off(dev);
2099
2100 for (i = 0; i < mp->txq_count; i++) {
2101 struct tx_queue *txq = mp->txq + i;
2102
2103 txq_reclaim(txq, txq->tx_ring_size, 1);
2104 txq_reset_hw_ptr(txq);
2105 }
2106 }
2107 return;
2108 }
2109
2110 switch (port_status & PORT_SPEED_MASK) {
2111 case PORT_SPEED_10:
2112 speed = 10;
2113 break;
2114 case PORT_SPEED_100:
2115 speed = 100;
2116 break;
2117 case PORT_SPEED_1000:
2118 speed = 1000;
2119 break;
2120 default:
2121 speed = -1;
2122 break;
2123 }
2124 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2125 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2126
2127 printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
2128 "flow control %sabled\n", dev->name,
2129 speed, duplex ? "full" : "half",
2130 fc ? "en" : "dis");
2131
2132 if (!netif_carrier_ok(dev))
2133 netif_carrier_on(dev);
2134 }
2135
2136 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2137 {
2138 struct mv643xx_eth_private *mp;
2139 int work_done;
2140
2141 mp = container_of(napi, struct mv643xx_eth_private, napi);
2142
2143 if (unlikely(mp->oom)) {
2144 mp->oom = 0;
2145 del_timer(&mp->rx_oom);
2146 }
2147
2148 work_done = 0;
2149 while (work_done < budget) {
2150 u8 queue_mask;
2151 int queue;
2152 int work_tbd;
2153
2154 if (mp->work_link) {
2155 mp->work_link = 0;
2156 handle_link_event(mp);
2157 work_done++;
2158 continue;
2159 }
2160
2161 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2162 if (likely(!mp->oom))
2163 queue_mask |= mp->work_rx_refill;
2164
2165 if (!queue_mask) {
2166 if (mv643xx_eth_collect_events(mp))
2167 continue;
2168 break;
2169 }
2170
2171 queue = fls(queue_mask) - 1;
2172 queue_mask = 1 << queue;
2173
2174 work_tbd = budget - work_done;
2175 if (work_tbd > 16)
2176 work_tbd = 16;
2177
2178 if (mp->work_tx_end & queue_mask) {
2179 txq_kick(mp->txq + queue);
2180 } else if (mp->work_tx & queue_mask) {
2181 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2182 txq_maybe_wake(mp->txq + queue);
2183 } else if (mp->work_rx & queue_mask) {
2184 work_done += rxq_process(mp->rxq + queue, work_tbd);
2185 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2186 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2187 } else {
2188 BUG();
2189 }
2190 }
2191
2192 if (work_done < budget) {
2193 if (mp->oom)
2194 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2195 napi_complete(napi);
2196 wrlp(mp, INT_MASK, mp->int_mask);
2197 }
2198
2199 return work_done;
2200 }
2201
2202 static inline void oom_timer_wrapper(unsigned long data)
2203 {
2204 struct mv643xx_eth_private *mp = (void *)data;
2205
2206 napi_schedule(&mp->napi);
2207 }
2208
2209 static void phy_reset(struct mv643xx_eth_private *mp)
2210 {
2211 int data;
2212
2213 data = phy_read(mp->phy, MII_BMCR);
2214 if (data < 0)
2215 return;
2216
2217 data |= BMCR_RESET;
2218 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2219 return;
2220
2221 do {
2222 data = phy_read(mp->phy, MII_BMCR);
2223 } while (data >= 0 && data & BMCR_RESET);
2224 }
2225
2226 static void port_start(struct mv643xx_eth_private *mp)
2227 {
2228 u32 pscr;
2229 int i;
2230
2231 /*
2232 * Perform PHY reset, if there is a PHY.
2233 */
2234 if (mp->phy != NULL) {
2235 struct ethtool_cmd cmd;
2236
2237 mv643xx_eth_get_settings(mp->dev, &cmd);
2238 phy_reset(mp);
2239 mv643xx_eth_set_settings(mp->dev, &cmd);
2240 }
2241
2242 /*
2243 * Configure basic link parameters.
2244 */
2245 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2246
2247 pscr |= SERIAL_PORT_ENABLE;
2248 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2249
2250 pscr |= DO_NOT_FORCE_LINK_FAIL;
2251 if (mp->phy == NULL)
2252 pscr |= FORCE_LINK_PASS;
2253 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2254
2255 /*
2256 * Configure TX path and queues.
2257 */
2258 tx_set_rate(mp, 1000000000, 16777216);
2259 for (i = 0; i < mp->txq_count; i++) {
2260 struct tx_queue *txq = mp->txq + i;
2261
2262 txq_reset_hw_ptr(txq);
2263 txq_set_rate(txq, 1000000000, 16777216);
2264 txq_set_fixed_prio_mode(txq);
2265 }
2266
2267 /*
2268 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2269 * frames to RX queue #0, and include the pseudo-header when
2270 * calculating receive checksums.
2271 */
2272 wrlp(mp, PORT_CONFIG, 0x02000000);
2273
2274 /*
2275 * Treat BPDUs as normal multicasts, and disable partition mode.
2276 */
2277 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2278
2279 /*
2280 * Add configured unicast addresses to address filter table.
2281 */
2282 mv643xx_eth_program_unicast_filter(mp->dev);
2283
2284 /*
2285 * Enable the receive queues.
2286 */
2287 for (i = 0; i < mp->rxq_count; i++) {
2288 struct rx_queue *rxq = mp->rxq + i;
2289 u32 addr;
2290
2291 addr = (u32)rxq->rx_desc_dma;
2292 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2293 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2294
2295 rxq_enable(rxq);
2296 }
2297 }
2298
2299 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2300 {
2301 int skb_size;
2302
2303 /*
2304 * Reserve 2+14 bytes for an ethernet header (the hardware
2305 * automatically prepends 2 bytes of dummy data to each
2306 * received packet), 16 bytes for up to four VLAN tags, and
2307 * 4 bytes for the trailing FCS -- 36 bytes total.
2308 */
2309 skb_size = mp->dev->mtu + 36;
2310
2311 /*
2312 * Make sure that the skb size is a multiple of 8 bytes, as
2313 * the lower three bits of the receive descriptor's buffer
2314 * size field are ignored by the hardware.
2315 */
2316 mp->skb_size = (skb_size + 7) & ~7;
2317
2318 /*
2319 * If NET_SKB_PAD is smaller than a cache line,
2320 * netdev_alloc_skb() will cause skb->data to be misaligned
2321 * to a cache line boundary. If this is the case, include
2322 * some extra space to allow re-aligning the data area.
2323 */
2324 mp->skb_size += SKB_DMA_REALIGN;
2325 }
2326
2327 static int mv643xx_eth_open(struct net_device *dev)
2328 {
2329 struct mv643xx_eth_private *mp = netdev_priv(dev);
2330 int err;
2331 int i;
2332
2333 wrlp(mp, INT_CAUSE, 0);
2334 wrlp(mp, INT_CAUSE_EXT, 0);
2335 rdlp(mp, INT_CAUSE_EXT);
2336
2337 err = request_irq(dev->irq, mv643xx_eth_irq,
2338 IRQF_SHARED, dev->name, dev);
2339 if (err) {
2340 dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
2341 return -EAGAIN;
2342 }
2343
2344 mv643xx_eth_recalc_skb_size(mp);
2345
2346 napi_enable(&mp->napi);
2347
2348 skb_queue_head_init(&mp->rx_recycle);
2349
2350 mp->int_mask = INT_EXT;
2351
2352 for (i = 0; i < mp->rxq_count; i++) {
2353 err = rxq_init(mp, i);
2354 if (err) {
2355 while (--i >= 0)
2356 rxq_deinit(mp->rxq + i);
2357 goto out;
2358 }
2359
2360 rxq_refill(mp->rxq + i, INT_MAX);
2361 mp->int_mask |= INT_RX_0 << i;
2362 }
2363
2364 if (mp->oom) {
2365 mp->rx_oom.expires = jiffies + (HZ / 10);
2366 add_timer(&mp->rx_oom);
2367 }
2368
2369 for (i = 0; i < mp->txq_count; i++) {
2370 err = txq_init(mp, i);
2371 if (err) {
2372 while (--i >= 0)
2373 txq_deinit(mp->txq + i);
2374 goto out_free;
2375 }
2376 mp->int_mask |= INT_TX_END_0 << i;
2377 }
2378
2379 port_start(mp);
2380
2381 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2382 wrlp(mp, INT_MASK, mp->int_mask);
2383
2384 return 0;
2385
2386
2387 out_free:
2388 for (i = 0; i < mp->rxq_count; i++)
2389 rxq_deinit(mp->rxq + i);
2390 out:
2391 free_irq(dev->irq, dev);
2392
2393 return err;
2394 }
2395
2396 static void port_reset(struct mv643xx_eth_private *mp)
2397 {
2398 unsigned int data;
2399 int i;
2400
2401 for (i = 0; i < mp->rxq_count; i++)
2402 rxq_disable(mp->rxq + i);
2403 for (i = 0; i < mp->txq_count; i++)
2404 txq_disable(mp->txq + i);
2405
2406 while (1) {
2407 u32 ps = rdlp(mp, PORT_STATUS);
2408
2409 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2410 break;
2411 udelay(10);
2412 }
2413
2414 /* Reset the Enable bit in the Configuration Register */
2415 data = rdlp(mp, PORT_SERIAL_CONTROL);
2416 data &= ~(SERIAL_PORT_ENABLE |
2417 DO_NOT_FORCE_LINK_FAIL |
2418 FORCE_LINK_PASS);
2419 wrlp(mp, PORT_SERIAL_CONTROL, data);
2420 }
2421
2422 static int mv643xx_eth_stop(struct net_device *dev)
2423 {
2424 struct mv643xx_eth_private *mp = netdev_priv(dev);
2425 int i;
2426
2427 wrlp(mp, INT_MASK_EXT, 0x00000000);
2428 wrlp(mp, INT_MASK, 0x00000000);
2429 rdlp(mp, INT_MASK);
2430
2431 napi_disable(&mp->napi);
2432
2433 del_timer_sync(&mp->rx_oom);
2434
2435 netif_carrier_off(dev);
2436
2437 free_irq(dev->irq, dev);
2438
2439 port_reset(mp);
2440 mv643xx_eth_get_stats(dev);
2441 mib_counters_update(mp);
2442 del_timer_sync(&mp->mib_counters_timer);
2443
2444 skb_queue_purge(&mp->rx_recycle);
2445
2446 for (i = 0; i < mp->rxq_count; i++)
2447 rxq_deinit(mp->rxq + i);
2448 for (i = 0; i < mp->txq_count; i++)
2449 txq_deinit(mp->txq + i);
2450
2451 return 0;
2452 }
2453
2454 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2455 {
2456 struct mv643xx_eth_private *mp = netdev_priv(dev);
2457
2458 if (mp->phy != NULL)
2459 return phy_mii_ioctl(mp->phy, ifr, cmd);
2460
2461 return -EOPNOTSUPP;
2462 }
2463
2464 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2465 {
2466 struct mv643xx_eth_private *mp = netdev_priv(dev);
2467
2468 if (new_mtu < 64 || new_mtu > 9500)
2469 return -EINVAL;
2470
2471 dev->mtu = new_mtu;
2472 mv643xx_eth_recalc_skb_size(mp);
2473 tx_set_rate(mp, 1000000000, 16777216);
2474
2475 if (!netif_running(dev))
2476 return 0;
2477
2478 /*
2479 * Stop and then re-open the interface. This will allocate RX
2480 * skbs of the new MTU.
2481 * There is a possible danger that the open will not succeed,
2482 * due to memory being full.
2483 */
2484 mv643xx_eth_stop(dev);
2485 if (mv643xx_eth_open(dev)) {
2486 dev_printk(KERN_ERR, &dev->dev,
2487 "fatal error on re-opening device after "
2488 "MTU change\n");
2489 }
2490
2491 return 0;
2492 }
2493
2494 static void tx_timeout_task(struct work_struct *ugly)
2495 {
2496 struct mv643xx_eth_private *mp;
2497
2498 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2499 if (netif_running(mp->dev)) {
2500 netif_tx_stop_all_queues(mp->dev);
2501 port_reset(mp);
2502 port_start(mp);
2503 netif_tx_wake_all_queues(mp->dev);
2504 }
2505 }
2506
2507 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2508 {
2509 struct mv643xx_eth_private *mp = netdev_priv(dev);
2510
2511 dev_printk(KERN_INFO, &dev->dev, "tx timeout\n");
2512
2513 schedule_work(&mp->tx_timeout_task);
2514 }
2515
2516 #ifdef CONFIG_NET_POLL_CONTROLLER
2517 static void mv643xx_eth_netpoll(struct net_device *dev)
2518 {
2519 struct mv643xx_eth_private *mp = netdev_priv(dev);
2520
2521 wrlp(mp, INT_MASK, 0x00000000);
2522 rdlp(mp, INT_MASK);
2523
2524 mv643xx_eth_irq(dev->irq, dev);
2525
2526 wrlp(mp, INT_MASK, mp->int_mask);
2527 }
2528 #endif
2529
2530
2531 /* platform glue ************************************************************/
2532 static void
2533 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2534 struct mbus_dram_target_info *dram)
2535 {
2536 void __iomem *base = msp->base;
2537 u32 win_enable;
2538 u32 win_protect;
2539 int i;
2540
2541 for (i = 0; i < 6; i++) {
2542 writel(0, base + WINDOW_BASE(i));
2543 writel(0, base + WINDOW_SIZE(i));
2544 if (i < 4)
2545 writel(0, base + WINDOW_REMAP_HIGH(i));
2546 }
2547
2548 win_enable = 0x3f;
2549 win_protect = 0;
2550
2551 for (i = 0; i < dram->num_cs; i++) {
2552 struct mbus_dram_window *cs = dram->cs + i;
2553
2554 writel((cs->base & 0xffff0000) |
2555 (cs->mbus_attr << 8) |
2556 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2557 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2558
2559 win_enable &= ~(1 << i);
2560 win_protect |= 3 << (2 * i);
2561 }
2562
2563 writel(win_enable, base + WINDOW_BAR_ENABLE);
2564 msp->win_protect = win_protect;
2565 }
2566
2567 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2568 {
2569 /*
2570 * Check whether we have a 14-bit coal limit field in bits
2571 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2572 * SDMA config register.
2573 */
2574 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2575 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2576 msp->extended_rx_coal_limit = 1;
2577 else
2578 msp->extended_rx_coal_limit = 0;
2579
2580 /*
2581 * Check whether the MAC supports TX rate control, and if
2582 * yes, whether its associated registers are in the old or
2583 * the new place.
2584 */
2585 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2586 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2587 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2588 } else {
2589 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2590 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2591 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2592 else
2593 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2594 }
2595 }
2596
2597 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2598 {
2599 static int mv643xx_eth_version_printed;
2600 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2601 struct mv643xx_eth_shared_private *msp;
2602 struct resource *res;
2603 int ret;
2604
2605 if (!mv643xx_eth_version_printed++)
2606 printk(KERN_NOTICE "MV-643xx 10/100/1000 ethernet "
2607 "driver version %s\n", mv643xx_eth_driver_version);
2608
2609 ret = -EINVAL;
2610 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2611 if (res == NULL)
2612 goto out;
2613
2614 ret = -ENOMEM;
2615 msp = kzalloc(sizeof(*msp), GFP_KERNEL);
2616 if (msp == NULL)
2617 goto out;
2618
2619 msp->base = ioremap(res->start, res->end - res->start + 1);
2620 if (msp->base == NULL)
2621 goto out_free;
2622
2623 /*
2624 * Set up and register SMI bus.
2625 */
2626 if (pd == NULL || pd->shared_smi == NULL) {
2627 msp->smi_bus = mdiobus_alloc();
2628 if (msp->smi_bus == NULL)
2629 goto out_unmap;
2630
2631 msp->smi_bus->priv = msp;
2632 msp->smi_bus->name = "mv643xx_eth smi";
2633 msp->smi_bus->read = smi_bus_read;
2634 msp->smi_bus->write = smi_bus_write,
2635 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2636 msp->smi_bus->parent = &pdev->dev;
2637 msp->smi_bus->phy_mask = 0xffffffff;
2638 if (mdiobus_register(msp->smi_bus) < 0)
2639 goto out_free_mii_bus;
2640 msp->smi = msp;
2641 } else {
2642 msp->smi = platform_get_drvdata(pd->shared_smi);
2643 }
2644
2645 msp->err_interrupt = NO_IRQ;
2646 init_waitqueue_head(&msp->smi_busy_wait);
2647
2648 /*
2649 * Check whether the error interrupt is hooked up.
2650 */
2651 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2652 if (res != NULL) {
2653 int err;
2654
2655 err = request_irq(res->start, mv643xx_eth_err_irq,
2656 IRQF_SHARED, "mv643xx_eth", msp);
2657 if (!err) {
2658 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2659 msp->err_interrupt = res->start;
2660 }
2661 }
2662
2663 /*
2664 * (Re-)program MBUS remapping windows if we are asked to.
2665 */
2666 if (pd != NULL && pd->dram != NULL)
2667 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2668
2669 /*
2670 * Detect hardware parameters.
2671 */
2672 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2673 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
2674 pd->tx_csum_limit : 9 * 1024;
2675 infer_hw_params(msp);
2676
2677 platform_set_drvdata(pdev, msp);
2678
2679 return 0;
2680
2681 out_free_mii_bus:
2682 mdiobus_free(msp->smi_bus);
2683 out_unmap:
2684 iounmap(msp->base);
2685 out_free:
2686 kfree(msp);
2687 out:
2688 return ret;
2689 }
2690
2691 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2692 {
2693 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2694 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2695
2696 if (pd == NULL || pd->shared_smi == NULL) {
2697 mdiobus_unregister(msp->smi_bus);
2698 mdiobus_free(msp->smi_bus);
2699 }
2700 if (msp->err_interrupt != NO_IRQ)
2701 free_irq(msp->err_interrupt, msp);
2702 iounmap(msp->base);
2703 kfree(msp);
2704
2705 return 0;
2706 }
2707
2708 static struct platform_driver mv643xx_eth_shared_driver = {
2709 .probe = mv643xx_eth_shared_probe,
2710 .remove = mv643xx_eth_shared_remove,
2711 .driver = {
2712 .name = MV643XX_ETH_SHARED_NAME,
2713 .owner = THIS_MODULE,
2714 },
2715 };
2716
2717 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2718 {
2719 int addr_shift = 5 * mp->port_num;
2720 u32 data;
2721
2722 data = rdl(mp, PHY_ADDR);
2723 data &= ~(0x1f << addr_shift);
2724 data |= (phy_addr & 0x1f) << addr_shift;
2725 wrl(mp, PHY_ADDR, data);
2726 }
2727
2728 static int phy_addr_get(struct mv643xx_eth_private *mp)
2729 {
2730 unsigned int data;
2731
2732 data = rdl(mp, PHY_ADDR);
2733
2734 return (data >> (5 * mp->port_num)) & 0x1f;
2735 }
2736
2737 static void set_params(struct mv643xx_eth_private *mp,
2738 struct mv643xx_eth_platform_data *pd)
2739 {
2740 struct net_device *dev = mp->dev;
2741
2742 if (is_valid_ether_addr(pd->mac_addr))
2743 memcpy(dev->dev_addr, pd->mac_addr, 6);
2744 else
2745 uc_addr_get(mp, dev->dev_addr);
2746
2747 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2748 if (pd->rx_queue_size)
2749 mp->rx_ring_size = pd->rx_queue_size;
2750 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2751 mp->rx_desc_sram_size = pd->rx_sram_size;
2752
2753 mp->rxq_count = pd->rx_queue_count ? : 1;
2754
2755 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2756 if (pd->tx_queue_size)
2757 mp->tx_ring_size = pd->tx_queue_size;
2758 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2759 mp->tx_desc_sram_size = pd->tx_sram_size;
2760
2761 mp->txq_count = pd->tx_queue_count ? : 1;
2762 }
2763
2764 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2765 int phy_addr)
2766 {
2767 struct mii_bus *bus = mp->shared->smi->smi_bus;
2768 struct phy_device *phydev;
2769 int start;
2770 int num;
2771 int i;
2772
2773 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2774 start = phy_addr_get(mp) & 0x1f;
2775 num = 32;
2776 } else {
2777 start = phy_addr & 0x1f;
2778 num = 1;
2779 }
2780
2781 phydev = NULL;
2782 for (i = 0; i < num; i++) {
2783 int addr = (start + i) & 0x1f;
2784
2785 if (bus->phy_map[addr] == NULL)
2786 mdiobus_scan(bus, addr);
2787
2788 if (phydev == NULL) {
2789 phydev = bus->phy_map[addr];
2790 if (phydev != NULL)
2791 phy_addr_set(mp, addr);
2792 }
2793 }
2794
2795 return phydev;
2796 }
2797
2798 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2799 {
2800 struct phy_device *phy = mp->phy;
2801
2802 phy_reset(mp);
2803
2804 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2805
2806 if (speed == 0) {
2807 phy->autoneg = AUTONEG_ENABLE;
2808 phy->speed = 0;
2809 phy->duplex = 0;
2810 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2811 } else {
2812 phy->autoneg = AUTONEG_DISABLE;
2813 phy->advertising = 0;
2814 phy->speed = speed;
2815 phy->duplex = duplex;
2816 }
2817 phy_start_aneg(phy);
2818 }
2819
2820 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2821 {
2822 u32 pscr;
2823
2824 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2825 if (pscr & SERIAL_PORT_ENABLE) {
2826 pscr &= ~SERIAL_PORT_ENABLE;
2827 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2828 }
2829
2830 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2831 if (mp->phy == NULL) {
2832 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2833 if (speed == SPEED_1000)
2834 pscr |= SET_GMII_SPEED_TO_1000;
2835 else if (speed == SPEED_100)
2836 pscr |= SET_MII_SPEED_TO_100;
2837
2838 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2839
2840 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2841 if (duplex == DUPLEX_FULL)
2842 pscr |= SET_FULL_DUPLEX_MODE;
2843 }
2844
2845 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2846 }
2847
2848 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2849 .ndo_open = mv643xx_eth_open,
2850 .ndo_stop = mv643xx_eth_stop,
2851 .ndo_start_xmit = mv643xx_eth_xmit,
2852 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2853 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2854 .ndo_validate_addr = eth_validate_addr,
2855 .ndo_do_ioctl = mv643xx_eth_ioctl,
2856 .ndo_change_mtu = mv643xx_eth_change_mtu,
2857 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2858 .ndo_get_stats = mv643xx_eth_get_stats,
2859 #ifdef CONFIG_NET_POLL_CONTROLLER
2860 .ndo_poll_controller = mv643xx_eth_netpoll,
2861 #endif
2862 };
2863
2864 static int mv643xx_eth_probe(struct platform_device *pdev)
2865 {
2866 struct mv643xx_eth_platform_data *pd;
2867 struct mv643xx_eth_private *mp;
2868 struct net_device *dev;
2869 struct resource *res;
2870 int err;
2871
2872 pd = pdev->dev.platform_data;
2873 if (pd == NULL) {
2874 dev_printk(KERN_ERR, &pdev->dev,
2875 "no mv643xx_eth_platform_data\n");
2876 return -ENODEV;
2877 }
2878
2879 if (pd->shared == NULL) {
2880 dev_printk(KERN_ERR, &pdev->dev,
2881 "no mv643xx_eth_platform_data->shared\n");
2882 return -ENODEV;
2883 }
2884
2885 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2886 if (!dev)
2887 return -ENOMEM;
2888
2889 mp = netdev_priv(dev);
2890 platform_set_drvdata(pdev, mp);
2891
2892 mp->shared = platform_get_drvdata(pd->shared);
2893 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2894 mp->port_num = pd->port_number;
2895
2896 mp->dev = dev;
2897
2898 set_params(mp, pd);
2899 netif_set_real_num_tx_queues(dev, mp->txq_count);
2900 netif_set_real_num_rx_queues(dev, mp->rxq_count);
2901
2902 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2903 mp->phy = phy_scan(mp, pd->phy_addr);
2904
2905 if (mp->phy != NULL)
2906 phy_init(mp, pd->speed, pd->duplex);
2907
2908 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2909
2910 init_pscr(mp, pd->speed, pd->duplex);
2911
2912
2913 mib_counters_clear(mp);
2914
2915 init_timer(&mp->mib_counters_timer);
2916 mp->mib_counters_timer.data = (unsigned long)mp;
2917 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2918 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2919 add_timer(&mp->mib_counters_timer);
2920
2921 spin_lock_init(&mp->mib_counters_lock);
2922
2923 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2924
2925 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2926
2927 init_timer(&mp->rx_oom);
2928 mp->rx_oom.data = (unsigned long)mp;
2929 mp->rx_oom.function = oom_timer_wrapper;
2930
2931
2932 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2933 BUG_ON(!res);
2934 dev->irq = res->start;
2935
2936 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2937
2938 dev->watchdog_timeo = 2 * HZ;
2939 dev->base_addr = 0;
2940
2941 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2942 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2943
2944 SET_NETDEV_DEV(dev, &pdev->dev);
2945
2946 if (mp->shared->win_protect)
2947 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2948
2949 netif_carrier_off(dev);
2950
2951 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2952
2953 set_rx_coal(mp, 250);
2954 set_tx_coal(mp, 0);
2955
2956 err = register_netdev(dev);
2957 if (err)
2958 goto out;
2959
2960 dev_printk(KERN_NOTICE, &dev->dev, "port %d with MAC address %pM\n",
2961 mp->port_num, dev->dev_addr);
2962
2963 if (mp->tx_desc_sram_size > 0)
2964 dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
2965
2966 return 0;
2967
2968 out:
2969 free_netdev(dev);
2970
2971 return err;
2972 }
2973
2974 static int mv643xx_eth_remove(struct platform_device *pdev)
2975 {
2976 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2977
2978 unregister_netdev(mp->dev);
2979 if (mp->phy != NULL)
2980 phy_detach(mp->phy);
2981 cancel_work_sync(&mp->tx_timeout_task);
2982 free_netdev(mp->dev);
2983
2984 platform_set_drvdata(pdev, NULL);
2985
2986 return 0;
2987 }
2988
2989 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2990 {
2991 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2992
2993 /* Mask all interrupts on ethernet port */
2994 wrlp(mp, INT_MASK, 0);
2995 rdlp(mp, INT_MASK);
2996
2997 if (netif_running(mp->dev))
2998 port_reset(mp);
2999 }
3000
3001 static struct platform_driver mv643xx_eth_driver = {
3002 .probe = mv643xx_eth_probe,
3003 .remove = mv643xx_eth_remove,
3004 .shutdown = mv643xx_eth_shutdown,
3005 .driver = {
3006 .name = MV643XX_ETH_NAME,
3007 .owner = THIS_MODULE,
3008 },
3009 };
3010
3011 static int __init mv643xx_eth_init_module(void)
3012 {
3013 int rc;
3014
3015 rc = platform_driver_register(&mv643xx_eth_shared_driver);
3016 if (!rc) {
3017 rc = platform_driver_register(&mv643xx_eth_driver);
3018 if (rc)
3019 platform_driver_unregister(&mv643xx_eth_shared_driver);
3020 }
3021
3022 return rc;
3023 }
3024 module_init(mv643xx_eth_init_module);
3025
3026 static void __exit mv643xx_eth_cleanup_module(void)
3027 {
3028 platform_driver_unregister(&mv643xx_eth_driver);
3029 platform_driver_unregister(&mv643xx_eth_shared_driver);
3030 }
3031 module_exit(mv643xx_eth_cleanup_module);
3032
3033 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3034 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3035 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3036 MODULE_LICENSE("GPL");
3037 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3038 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux kernel - Deliverables
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