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ar9170usb: reset device on resume
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / mv643xx_eth.c
bloba400d7115f78ce94f8a03f31f9631ed170b9cb81
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 <asm/system.h>
58
59 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
60 static char mv643xx_eth_driver_version[] = "1.4";
61
62
63 /*
64 * Registers shared between all ports.
65 */
66 #define PHY_ADDR 0x0000
67 #define SMI_REG 0x0004
68 #define SMI_BUSY 0x10000000
69 #define SMI_READ_VALID 0x08000000
70 #define SMI_OPCODE_READ 0x04000000
71 #define SMI_OPCODE_WRITE 0x00000000
72 #define ERR_INT_CAUSE 0x0080
73 #define ERR_INT_SMI_DONE 0x00000010
74 #define ERR_INT_MASK 0x0084
75 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
76 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
77 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
78 #define WINDOW_BAR_ENABLE 0x0290
79 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
80
81 /*
82 * Main per-port registers. These live at offset 0x0400 for
83 * port #0, 0x0800 for port #1, and 0x0c00 for port #2.
84 */
85 #define PORT_CONFIG 0x0000
86 #define UNICAST_PROMISCUOUS_MODE 0x00000001
87 #define PORT_CONFIG_EXT 0x0004
88 #define MAC_ADDR_LOW 0x0014
89 #define MAC_ADDR_HIGH 0x0018
90 #define SDMA_CONFIG 0x001c
91 #define PORT_SERIAL_CONTROL 0x003c
92 #define PORT_STATUS 0x0044
93 #define TX_FIFO_EMPTY 0x00000400
94 #define TX_IN_PROGRESS 0x00000080
95 #define PORT_SPEED_MASK 0x00000030
96 #define PORT_SPEED_1000 0x00000010
97 #define PORT_SPEED_100 0x00000020
98 #define PORT_SPEED_10 0x00000000
99 #define FLOW_CONTROL_ENABLED 0x00000008
100 #define FULL_DUPLEX 0x00000004
101 #define LINK_UP 0x00000002
102 #define TXQ_COMMAND 0x0048
103 #define TXQ_FIX_PRIO_CONF 0x004c
104 #define TX_BW_RATE 0x0050
105 #define TX_BW_MTU 0x0058
106 #define TX_BW_BURST 0x005c
107 #define INT_CAUSE 0x0060
108 #define INT_TX_END 0x07f80000
109 #define INT_RX 0x000003fc
110 #define INT_EXT 0x00000002
111 #define INT_CAUSE_EXT 0x0064
112 #define INT_EXT_LINK_PHY 0x00110000
113 #define INT_EXT_TX 0x000000ff
114 #define INT_MASK 0x0068
115 #define INT_MASK_EXT 0x006c
116 #define TX_FIFO_URGENT_THRESHOLD 0x0074
117 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
118 #define TX_BW_RATE_MOVED 0x00e0
119 #define TX_BW_MTU_MOVED 0x00e8
120 #define TX_BW_BURST_MOVED 0x00ec
121 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
122 #define RXQ_COMMAND 0x0280
123 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
124 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
125 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
126 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
127
128 /*
129 * Misc per-port registers.
130 */
131 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
132 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
133 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
134 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
135
136
137 /*
138 * SDMA configuration register.
139 */
140 #define RX_BURST_SIZE_4_64BIT (2 << 1)
141 #define RX_BURST_SIZE_16_64BIT (4 << 1)
142 #define BLM_RX_NO_SWAP (1 << 4)
143 #define BLM_TX_NO_SWAP (1 << 5)
144 #define TX_BURST_SIZE_4_64BIT (2 << 22)
145 #define TX_BURST_SIZE_16_64BIT (4 << 22)
146
147 #if defined(__BIG_ENDIAN)
148 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
149 (RX_BURST_SIZE_4_64BIT | \
150 TX_BURST_SIZE_4_64BIT)
151 #elif defined(__LITTLE_ENDIAN)
152 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
153 (RX_BURST_SIZE_4_64BIT | \
154 BLM_RX_NO_SWAP | \
155 BLM_TX_NO_SWAP | \
156 TX_BURST_SIZE_4_64BIT)
157 #else
158 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
159 #endif
160
161
162 /*
163 * Port serial control register.
164 */
165 #define SET_MII_SPEED_TO_100 (1 << 24)
166 #define SET_GMII_SPEED_TO_1000 (1 << 23)
167 #define SET_FULL_DUPLEX_MODE (1 << 21)
168 #define MAX_RX_PACKET_9700BYTE (5 << 17)
169 #define DISABLE_AUTO_NEG_SPEED_GMII (1 << 13)
170 #define DO_NOT_FORCE_LINK_FAIL (1 << 10)
171 #define SERIAL_PORT_CONTROL_RESERVED (1 << 9)
172 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL (1 << 3)
173 #define DISABLE_AUTO_NEG_FOR_DUPLEX (1 << 2)
174 #define FORCE_LINK_PASS (1 << 1)
175 #define SERIAL_PORT_ENABLE (1 << 0)
176
177 #define DEFAULT_RX_QUEUE_SIZE 128
178 #define DEFAULT_TX_QUEUE_SIZE 256
179
180
181 /*
182 * RX/TX descriptors.
183 */
184 #if defined(__BIG_ENDIAN)
185 struct rx_desc {
186 u16 byte_cnt; /* Descriptor buffer byte count */
187 u16 buf_size; /* Buffer size */
188 u32 cmd_sts; /* Descriptor command status */
189 u32 next_desc_ptr; /* Next descriptor pointer */
190 u32 buf_ptr; /* Descriptor buffer pointer */
191 };
192
193 struct tx_desc {
194 u16 byte_cnt; /* buffer byte count */
195 u16 l4i_chk; /* CPU provided TCP checksum */
196 u32 cmd_sts; /* Command/status field */
197 u32 next_desc_ptr; /* Pointer to next descriptor */
198 u32 buf_ptr; /* pointer to buffer for this descriptor*/
199 };
200 #elif defined(__LITTLE_ENDIAN)
201 struct rx_desc {
202 u32 cmd_sts; /* Descriptor command status */
203 u16 buf_size; /* Buffer size */
204 u16 byte_cnt; /* Descriptor buffer byte count */
205 u32 buf_ptr; /* Descriptor buffer pointer */
206 u32 next_desc_ptr; /* Next descriptor pointer */
207 };
208
209 struct tx_desc {
210 u32 cmd_sts; /* Command/status field */
211 u16 l4i_chk; /* CPU provided TCP checksum */
212 u16 byte_cnt; /* buffer byte count */
213 u32 buf_ptr; /* pointer to buffer for this descriptor*/
214 u32 next_desc_ptr; /* Pointer to next descriptor */
215 };
216 #else
217 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
218 #endif
219
220 /* RX & TX descriptor command */
221 #define BUFFER_OWNED_BY_DMA 0x80000000
222
223 /* RX & TX descriptor status */
224 #define ERROR_SUMMARY 0x00000001
225
226 /* RX descriptor status */
227 #define LAYER_4_CHECKSUM_OK 0x40000000
228 #define RX_ENABLE_INTERRUPT 0x20000000
229 #define RX_FIRST_DESC 0x08000000
230 #define RX_LAST_DESC 0x04000000
231 #define RX_IP_HDR_OK 0x02000000
232 #define RX_PKT_IS_IPV4 0x01000000
233 #define RX_PKT_IS_ETHERNETV2 0x00800000
234 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
235 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
236 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
237
238 /* TX descriptor command */
239 #define TX_ENABLE_INTERRUPT 0x00800000
240 #define GEN_CRC 0x00400000
241 #define TX_FIRST_DESC 0x00200000
242 #define TX_LAST_DESC 0x00100000
243 #define ZERO_PADDING 0x00080000
244 #define GEN_IP_V4_CHECKSUM 0x00040000
245 #define GEN_TCP_UDP_CHECKSUM 0x00020000
246 #define UDP_FRAME 0x00010000
247 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
248 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
249
250 #define TX_IHL_SHIFT 11
251
252
253 /* global *******************************************************************/
254 struct mv643xx_eth_shared_private {
255 /*
256 * Ethernet controller base address.
257 */
258 void __iomem *base;
259
260 /*
261 * Points at the right SMI instance to use.
262 */
263 struct mv643xx_eth_shared_private *smi;
264
265 /*
266 * Provides access to local SMI interface.
267 */
268 struct mii_bus *smi_bus;
269
270 /*
271 * If we have access to the error interrupt pin (which is
272 * somewhat misnamed as it not only reflects internal errors
273 * but also reflects SMI completion), use that to wait for
274 * SMI access completion instead of polling the SMI busy bit.
275 */
276 int err_interrupt;
277 wait_queue_head_t smi_busy_wait;
278
279 /*
280 * Per-port MBUS window access register value.
281 */
282 u32 win_protect;
283
284 /*
285 * Hardware-specific parameters.
286 */
287 unsigned int t_clk;
288 int extended_rx_coal_limit;
289 int tx_bw_control;
290 };
291
292 #define TX_BW_CONTROL_ABSENT 0
293 #define TX_BW_CONTROL_OLD_LAYOUT 1
294 #define TX_BW_CONTROL_NEW_LAYOUT 2
295
296 static int mv643xx_eth_open(struct net_device *dev);
297 static int mv643xx_eth_stop(struct net_device *dev);
298
299
300 /* per-port *****************************************************************/
301 struct mib_counters {
302 u64 good_octets_received;
303 u32 bad_octets_received;
304 u32 internal_mac_transmit_err;
305 u32 good_frames_received;
306 u32 bad_frames_received;
307 u32 broadcast_frames_received;
308 u32 multicast_frames_received;
309 u32 frames_64_octets;
310 u32 frames_65_to_127_octets;
311 u32 frames_128_to_255_octets;
312 u32 frames_256_to_511_octets;
313 u32 frames_512_to_1023_octets;
314 u32 frames_1024_to_max_octets;
315 u64 good_octets_sent;
316 u32 good_frames_sent;
317 u32 excessive_collision;
318 u32 multicast_frames_sent;
319 u32 broadcast_frames_sent;
320 u32 unrec_mac_control_received;
321 u32 fc_sent;
322 u32 good_fc_received;
323 u32 bad_fc_received;
324 u32 undersize_received;
325 u32 fragments_received;
326 u32 oversize_received;
327 u32 jabber_received;
328 u32 mac_receive_error;
329 u32 bad_crc_event;
330 u32 collision;
331 u32 late_collision;
332 };
333
334 struct lro_counters {
335 u32 lro_aggregated;
336 u32 lro_flushed;
337 u32 lro_no_desc;
338 };
339
340 struct rx_queue {
341 int index;
342
343 int rx_ring_size;
344
345 int rx_desc_count;
346 int rx_curr_desc;
347 int rx_used_desc;
348
349 struct rx_desc *rx_desc_area;
350 dma_addr_t rx_desc_dma;
351 int rx_desc_area_size;
352 struct sk_buff **rx_skb;
353
354 struct net_lro_mgr lro_mgr;
355 struct net_lro_desc lro_arr[8];
356 };
357
358 struct tx_queue {
359 int index;
360
361 int tx_ring_size;
362
363 int tx_desc_count;
364 int tx_curr_desc;
365 int tx_used_desc;
366
367 struct tx_desc *tx_desc_area;
368 dma_addr_t tx_desc_dma;
369 int tx_desc_area_size;
370
371 struct sk_buff_head tx_skb;
372
373 unsigned long tx_packets;
374 unsigned long tx_bytes;
375 unsigned long tx_dropped;
376 };
377
378 struct mv643xx_eth_private {
379 struct mv643xx_eth_shared_private *shared;
380 void __iomem *base;
381 int port_num;
382
383 struct net_device *dev;
384
385 struct phy_device *phy;
386
387 struct timer_list mib_counters_timer;
388 spinlock_t mib_counters_lock;
389 struct mib_counters mib_counters;
390
391 struct lro_counters lro_counters;
392
393 struct work_struct tx_timeout_task;
394
395 struct napi_struct napi;
396 u8 oom;
397 u8 work_link;
398 u8 work_tx;
399 u8 work_tx_end;
400 u8 work_rx;
401 u8 work_rx_refill;
402
403 int skb_size;
404 struct sk_buff_head rx_recycle;
405
406 /*
407 * RX state.
408 */
409 int rx_ring_size;
410 unsigned long rx_desc_sram_addr;
411 int rx_desc_sram_size;
412 int rxq_count;
413 struct timer_list rx_oom;
414 struct rx_queue rxq[8];
415
416 /*
417 * TX state.
418 */
419 int tx_ring_size;
420 unsigned long tx_desc_sram_addr;
421 int tx_desc_sram_size;
422 int txq_count;
423 struct tx_queue txq[8];
424 };
425
426
427 /* port register accessors **************************************************/
428 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
429 {
430 return readl(mp->shared->base + offset);
431 }
432
433 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
434 {
435 return readl(mp->base + offset);
436 }
437
438 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
439 {
440 writel(data, mp->shared->base + offset);
441 }
442
443 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
444 {
445 writel(data, mp->base + offset);
446 }
447
448
449 /* rxq/txq helper functions *************************************************/
450 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
451 {
452 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
453 }
454
455 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
456 {
457 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
458 }
459
460 static void rxq_enable(struct rx_queue *rxq)
461 {
462 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
463 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
464 }
465
466 static void rxq_disable(struct rx_queue *rxq)
467 {
468 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
469 u8 mask = 1 << rxq->index;
470
471 wrlp(mp, RXQ_COMMAND, mask << 8);
472 while (rdlp(mp, RXQ_COMMAND) & mask)
473 udelay(10);
474 }
475
476 static void txq_reset_hw_ptr(struct tx_queue *txq)
477 {
478 struct mv643xx_eth_private *mp = txq_to_mp(txq);
479 u32 addr;
480
481 addr = (u32)txq->tx_desc_dma;
482 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
483 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
484 }
485
486 static void txq_enable(struct tx_queue *txq)
487 {
488 struct mv643xx_eth_private *mp = txq_to_mp(txq);
489 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
490 }
491
492 static void txq_disable(struct tx_queue *txq)
493 {
494 struct mv643xx_eth_private *mp = txq_to_mp(txq);
495 u8 mask = 1 << txq->index;
496
497 wrlp(mp, TXQ_COMMAND, mask << 8);
498 while (rdlp(mp, TXQ_COMMAND) & mask)
499 udelay(10);
500 }
501
502 static void txq_maybe_wake(struct tx_queue *txq)
503 {
504 struct mv643xx_eth_private *mp = txq_to_mp(txq);
505 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
506
507 if (netif_tx_queue_stopped(nq)) {
508 __netif_tx_lock(nq, smp_processor_id());
509 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1)
510 netif_tx_wake_queue(nq);
511 __netif_tx_unlock(nq);
512 }
513 }
514
515
516 /* rx napi ******************************************************************/
517 static int
518 mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph,
519 u64 *hdr_flags, void *priv)
520 {
521 unsigned long cmd_sts = (unsigned long)priv;
522
523 /*
524 * Make sure that this packet is Ethernet II, is not VLAN
525 * tagged, is IPv4, has a valid IP header, and is TCP.
526 */
527 if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
528 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK |
529 RX_PKT_IS_VLAN_TAGGED)) !=
530 (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
531 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4))
532 return -1;
533
534 skb_reset_network_header(skb);
535 skb_set_transport_header(skb, ip_hdrlen(skb));
536 *iphdr = ip_hdr(skb);
537 *tcph = tcp_hdr(skb);
538 *hdr_flags = LRO_IPV4 | LRO_TCP;
539
540 return 0;
541 }
542
543 static int rxq_process(struct rx_queue *rxq, int budget)
544 {
545 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
546 struct net_device_stats *stats = &mp->dev->stats;
547 int lro_flush_needed;
548 int rx;
549
550 lro_flush_needed = 0;
551 rx = 0;
552 while (rx < budget && rxq->rx_desc_count) {
553 struct rx_desc *rx_desc;
554 unsigned int cmd_sts;
555 struct sk_buff *skb;
556 u16 byte_cnt;
557
558 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
559
560 cmd_sts = rx_desc->cmd_sts;
561 if (cmd_sts & BUFFER_OWNED_BY_DMA)
562 break;
563 rmb();
564
565 skb = rxq->rx_skb[rxq->rx_curr_desc];
566 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
567
568 rxq->rx_curr_desc++;
569 if (rxq->rx_curr_desc == rxq->rx_ring_size)
570 rxq->rx_curr_desc = 0;
571
572 dma_unmap_single(NULL, rx_desc->buf_ptr,
573 rx_desc->buf_size, DMA_FROM_DEVICE);
574 rxq->rx_desc_count--;
575 rx++;
576
577 mp->work_rx_refill |= 1 << rxq->index;
578
579 byte_cnt = rx_desc->byte_cnt;
580
581 /*
582 * Update statistics.
583 *
584 * Note that the descriptor byte count includes 2 dummy
585 * bytes automatically inserted by the hardware at the
586 * start of the packet (which we don't count), and a 4
587 * byte CRC at the end of the packet (which we do count).
588 */
589 stats->rx_packets++;
590 stats->rx_bytes += byte_cnt - 2;
591
592 /*
593 * In case we received a packet without first / last bits
594 * on, or the error summary bit is set, the packet needs
595 * to be dropped.
596 */
597 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
598 != (RX_FIRST_DESC | RX_LAST_DESC))
599 goto err;
600
601 /*
602 * The -4 is for the CRC in the trailer of the
603 * received packet
604 */
605 skb_put(skb, byte_cnt - 2 - 4);
606
607 if (cmd_sts & LAYER_4_CHECKSUM_OK)
608 skb->ip_summed = CHECKSUM_UNNECESSARY;
609 skb->protocol = eth_type_trans(skb, mp->dev);
610
611 if (skb->dev->features & NETIF_F_LRO &&
612 skb->ip_summed == CHECKSUM_UNNECESSARY) {
613 lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts);
614 lro_flush_needed = 1;
615 } else
616 netif_receive_skb(skb);
617
618 continue;
619
620 err:
621 stats->rx_dropped++;
622
623 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
624 (RX_FIRST_DESC | RX_LAST_DESC)) {
625 if (net_ratelimit())
626 dev_printk(KERN_ERR, &mp->dev->dev,
627 "received packet spanning "
628 "multiple descriptors\n");
629 }
630
631 if (cmd_sts & ERROR_SUMMARY)
632 stats->rx_errors++;
633
634 dev_kfree_skb(skb);
635 }
636
637 if (lro_flush_needed)
638 lro_flush_all(&rxq->lro_mgr);
639
640 if (rx < budget)
641 mp->work_rx &= ~(1 << rxq->index);
642
643 return rx;
644 }
645
646 static int rxq_refill(struct rx_queue *rxq, int budget)
647 {
648 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
649 int refilled;
650
651 refilled = 0;
652 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
653 struct sk_buff *skb;
654 int unaligned;
655 int rx;
656 struct rx_desc *rx_desc;
657
658 skb = __skb_dequeue(&mp->rx_recycle);
659 if (skb == NULL)
660 skb = dev_alloc_skb(mp->skb_size +
661 dma_get_cache_alignment() - 1);
662
663 if (skb == NULL) {
664 mp->oom = 1;
665 goto oom;
666 }
667
668 unaligned = (u32)skb->data & (dma_get_cache_alignment() - 1);
669 if (unaligned)
670 skb_reserve(skb, dma_get_cache_alignment() - unaligned);
671
672 refilled++;
673 rxq->rx_desc_count++;
674
675 rx = rxq->rx_used_desc++;
676 if (rxq->rx_used_desc == rxq->rx_ring_size)
677 rxq->rx_used_desc = 0;
678
679 rx_desc = rxq->rx_desc_area + rx;
680
681 rx_desc->buf_ptr = dma_map_single(NULL, skb->data,
682 mp->skb_size, DMA_FROM_DEVICE);
683 rx_desc->buf_size = mp->skb_size;
684 rxq->rx_skb[rx] = skb;
685 wmb();
686 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
687 wmb();
688
689 /*
690 * The hardware automatically prepends 2 bytes of
691 * dummy data to each received packet, so that the
692 * IP header ends up 16-byte aligned.
693 */
694 skb_reserve(skb, 2);
695 }
696
697 if (refilled < budget)
698 mp->work_rx_refill &= ~(1 << rxq->index);
699
700 oom:
701 return refilled;
702 }
703
704
705 /* tx ***********************************************************************/
706 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
707 {
708 int frag;
709
710 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
711 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
712 if (fragp->size <= 8 && fragp->page_offset & 7)
713 return 1;
714 }
715
716 return 0;
717 }
718
719 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
720 {
721 int nr_frags = skb_shinfo(skb)->nr_frags;
722 int frag;
723
724 for (frag = 0; frag < nr_frags; frag++) {
725 skb_frag_t *this_frag;
726 int tx_index;
727 struct tx_desc *desc;
728
729 this_frag = &skb_shinfo(skb)->frags[frag];
730 tx_index = txq->tx_curr_desc++;
731 if (txq->tx_curr_desc == txq->tx_ring_size)
732 txq->tx_curr_desc = 0;
733 desc = &txq->tx_desc_area[tx_index];
734
735 /*
736 * The last fragment will generate an interrupt
737 * which will free the skb on TX completion.
738 */
739 if (frag == nr_frags - 1) {
740 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
741 ZERO_PADDING | TX_LAST_DESC |
742 TX_ENABLE_INTERRUPT;
743 } else {
744 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
745 }
746
747 desc->l4i_chk = 0;
748 desc->byte_cnt = this_frag->size;
749 desc->buf_ptr = dma_map_page(NULL, this_frag->page,
750 this_frag->page_offset,
751 this_frag->size,
752 DMA_TO_DEVICE);
753 }
754 }
755
756 static inline __be16 sum16_as_be(__sum16 sum)
757 {
758 return (__force __be16)sum;
759 }
760
761 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
762 {
763 struct mv643xx_eth_private *mp = txq_to_mp(txq);
764 int nr_frags = skb_shinfo(skb)->nr_frags;
765 int tx_index;
766 struct tx_desc *desc;
767 u32 cmd_sts;
768 u16 l4i_chk;
769 int length;
770
771 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
772 l4i_chk = 0;
773
774 if (skb->ip_summed == CHECKSUM_PARTIAL) {
775 int tag_bytes;
776
777 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
778 skb->protocol != htons(ETH_P_8021Q));
779
780 tag_bytes = (void *)ip_hdr(skb) - (void *)skb->data - ETH_HLEN;
781 if (unlikely(tag_bytes & ~12)) {
782 if (skb_checksum_help(skb) == 0)
783 goto no_csum;
784 kfree_skb(skb);
785 return 1;
786 }
787
788 if (tag_bytes & 4)
789 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
790 if (tag_bytes & 8)
791 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
792
793 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
794 GEN_IP_V4_CHECKSUM |
795 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
796
797 switch (ip_hdr(skb)->protocol) {
798 case IPPROTO_UDP:
799 cmd_sts |= UDP_FRAME;
800 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
801 break;
802 case IPPROTO_TCP:
803 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
804 break;
805 default:
806 BUG();
807 }
808 } else {
809 no_csum:
810 /* Errata BTS #50, IHL must be 5 if no HW checksum */
811 cmd_sts |= 5 << TX_IHL_SHIFT;
812 }
813
814 tx_index = txq->tx_curr_desc++;
815 if (txq->tx_curr_desc == txq->tx_ring_size)
816 txq->tx_curr_desc = 0;
817 desc = &txq->tx_desc_area[tx_index];
818
819 if (nr_frags) {
820 txq_submit_frag_skb(txq, skb);
821 length = skb_headlen(skb);
822 } else {
823 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
824 length = skb->len;
825 }
826
827 desc->l4i_chk = l4i_chk;
828 desc->byte_cnt = length;
829 desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE);
830
831 __skb_queue_tail(&txq->tx_skb, skb);
832
833 /* ensure all other descriptors are written before first cmd_sts */
834 wmb();
835 desc->cmd_sts = cmd_sts;
836
837 /* clear TX_END status */
838 mp->work_tx_end &= ~(1 << txq->index);
839
840 /* ensure all descriptors are written before poking hardware */
841 wmb();
842 txq_enable(txq);
843
844 txq->tx_desc_count += nr_frags + 1;
845
846 return 0;
847 }
848
849 static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
850 {
851 struct mv643xx_eth_private *mp = netdev_priv(dev);
852 int queue;
853 struct tx_queue *txq;
854 struct netdev_queue *nq;
855
856 queue = skb_get_queue_mapping(skb);
857 txq = mp->txq + queue;
858 nq = netdev_get_tx_queue(dev, queue);
859
860 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
861 txq->tx_dropped++;
862 dev_printk(KERN_DEBUG, &dev->dev,
863 "failed to linearize skb with tiny "
864 "unaligned fragment\n");
865 return NETDEV_TX_BUSY;
866 }
867
868 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
869 if (net_ratelimit())
870 dev_printk(KERN_ERR, &dev->dev, "tx queue full?!\n");
871 kfree_skb(skb);
872 return NETDEV_TX_OK;
873 }
874
875 if (!txq_submit_skb(txq, skb)) {
876 int entries_left;
877
878 txq->tx_bytes += skb->len;
879 txq->tx_packets++;
880 dev->trans_start = jiffies;
881
882 entries_left = txq->tx_ring_size - txq->tx_desc_count;
883 if (entries_left < MAX_SKB_FRAGS + 1)
884 netif_tx_stop_queue(nq);
885 }
886
887 return NETDEV_TX_OK;
888 }
889
890
891 /* tx napi ******************************************************************/
892 static void txq_kick(struct tx_queue *txq)
893 {
894 struct mv643xx_eth_private *mp = txq_to_mp(txq);
895 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
896 u32 hw_desc_ptr;
897 u32 expected_ptr;
898
899 __netif_tx_lock(nq, smp_processor_id());
900
901 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
902 goto out;
903
904 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
905 expected_ptr = (u32)txq->tx_desc_dma +
906 txq->tx_curr_desc * sizeof(struct tx_desc);
907
908 if (hw_desc_ptr != expected_ptr)
909 txq_enable(txq);
910
911 out:
912 __netif_tx_unlock(nq);
913
914 mp->work_tx_end &= ~(1 << txq->index);
915 }
916
917 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
918 {
919 struct mv643xx_eth_private *mp = txq_to_mp(txq);
920 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
921 int reclaimed;
922
923 __netif_tx_lock(nq, smp_processor_id());
924
925 reclaimed = 0;
926 while (reclaimed < budget && txq->tx_desc_count > 0) {
927 int tx_index;
928 struct tx_desc *desc;
929 u32 cmd_sts;
930 struct sk_buff *skb;
931
932 tx_index = txq->tx_used_desc;
933 desc = &txq->tx_desc_area[tx_index];
934 cmd_sts = desc->cmd_sts;
935
936 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
937 if (!force)
938 break;
939 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
940 }
941
942 txq->tx_used_desc = tx_index + 1;
943 if (txq->tx_used_desc == txq->tx_ring_size)
944 txq->tx_used_desc = 0;
945
946 reclaimed++;
947 txq->tx_desc_count--;
948
949 skb = NULL;
950 if (cmd_sts & TX_LAST_DESC)
951 skb = __skb_dequeue(&txq->tx_skb);
952
953 if (cmd_sts & ERROR_SUMMARY) {
954 dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n");
955 mp->dev->stats.tx_errors++;
956 }
957
958 if (cmd_sts & TX_FIRST_DESC) {
959 dma_unmap_single(NULL, desc->buf_ptr,
960 desc->byte_cnt, DMA_TO_DEVICE);
961 } else {
962 dma_unmap_page(NULL, desc->buf_ptr,
963 desc->byte_cnt, DMA_TO_DEVICE);
964 }
965
966 if (skb != NULL) {
967 if (skb_queue_len(&mp->rx_recycle) <
968 mp->rx_ring_size &&
969 skb_recycle_check(skb, mp->skb_size +
970 dma_get_cache_alignment() - 1))
971 __skb_queue_head(&mp->rx_recycle, skb);
972 else
973 dev_kfree_skb(skb);
974 }
975 }
976
977 __netif_tx_unlock(nq);
978
979 if (reclaimed < budget)
980 mp->work_tx &= ~(1 << txq->index);
981
982 return reclaimed;
983 }
984
985
986 /* tx rate control **********************************************************/
987 /*
988 * Set total maximum TX rate (shared by all TX queues for this port)
989 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
990 */
991 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
992 {
993 int token_rate;
994 int mtu;
995 int bucket_size;
996
997 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
998 if (token_rate > 1023)
999 token_rate = 1023;
1000
1001 mtu = (mp->dev->mtu + 255) >> 8;
1002 if (mtu > 63)
1003 mtu = 63;
1004
1005 bucket_size = (burst + 255) >> 8;
1006 if (bucket_size > 65535)
1007 bucket_size = 65535;
1008
1009 switch (mp->shared->tx_bw_control) {
1010 case TX_BW_CONTROL_OLD_LAYOUT:
1011 wrlp(mp, TX_BW_RATE, token_rate);
1012 wrlp(mp, TX_BW_MTU, mtu);
1013 wrlp(mp, TX_BW_BURST, bucket_size);
1014 break;
1015 case TX_BW_CONTROL_NEW_LAYOUT:
1016 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1017 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1018 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1019 break;
1020 }
1021 }
1022
1023 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1024 {
1025 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1026 int token_rate;
1027 int bucket_size;
1028
1029 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1030 if (token_rate > 1023)
1031 token_rate = 1023;
1032
1033 bucket_size = (burst + 255) >> 8;
1034 if (bucket_size > 65535)
1035 bucket_size = 65535;
1036
1037 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1038 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1039 }
1040
1041 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1042 {
1043 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1044 int off;
1045 u32 val;
1046
1047 /*
1048 * Turn on fixed priority mode.
1049 */
1050 off = 0;
1051 switch (mp->shared->tx_bw_control) {
1052 case TX_BW_CONTROL_OLD_LAYOUT:
1053 off = TXQ_FIX_PRIO_CONF;
1054 break;
1055 case TX_BW_CONTROL_NEW_LAYOUT:
1056 off = TXQ_FIX_PRIO_CONF_MOVED;
1057 break;
1058 }
1059
1060 if (off) {
1061 val = rdlp(mp, off);
1062 val |= 1 << txq->index;
1063 wrlp(mp, off, val);
1064 }
1065 }
1066
1067 static void txq_set_wrr(struct tx_queue *txq, int weight)
1068 {
1069 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1070 int off;
1071 u32 val;
1072
1073 /*
1074 * Turn off fixed priority mode.
1075 */
1076 off = 0;
1077 switch (mp->shared->tx_bw_control) {
1078 case TX_BW_CONTROL_OLD_LAYOUT:
1079 off = TXQ_FIX_PRIO_CONF;
1080 break;
1081 case TX_BW_CONTROL_NEW_LAYOUT:
1082 off = TXQ_FIX_PRIO_CONF_MOVED;
1083 break;
1084 }
1085
1086 if (off) {
1087 val = rdlp(mp, off);
1088 val &= ~(1 << txq->index);
1089 wrlp(mp, off, val);
1090
1091 /*
1092 * Configure WRR weight for this queue.
1093 */
1094
1095 val = rdlp(mp, off);
1096 val = (val & ~0xff) | (weight & 0xff);
1097 wrlp(mp, TXQ_BW_WRR_CONF(txq->index), val);
1098 }
1099 }
1100
1101
1102 /* mii management interface *************************************************/
1103 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1104 {
1105 struct mv643xx_eth_shared_private *msp = dev_id;
1106
1107 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1108 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1109 wake_up(&msp->smi_busy_wait);
1110 return IRQ_HANDLED;
1111 }
1112
1113 return IRQ_NONE;
1114 }
1115
1116 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1117 {
1118 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1119 }
1120
1121 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1122 {
1123 if (msp->err_interrupt == NO_IRQ) {
1124 int i;
1125
1126 for (i = 0; !smi_is_done(msp); i++) {
1127 if (i == 10)
1128 return -ETIMEDOUT;
1129 msleep(10);
1130 }
1131
1132 return 0;
1133 }
1134
1135 if (!smi_is_done(msp)) {
1136 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1137 msecs_to_jiffies(100));
1138 if (!smi_is_done(msp))
1139 return -ETIMEDOUT;
1140 }
1141
1142 return 0;
1143 }
1144
1145 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1146 {
1147 struct mv643xx_eth_shared_private *msp = bus->priv;
1148 void __iomem *smi_reg = msp->base + SMI_REG;
1149 int ret;
1150
1151 if (smi_wait_ready(msp)) {
1152 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1153 return -ETIMEDOUT;
1154 }
1155
1156 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), 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 ret = readl(smi_reg);
1164 if (!(ret & SMI_READ_VALID)) {
1165 printk(KERN_WARNING "mv643xx_eth: SMI bus read not valid\n");
1166 return -ENODEV;
1167 }
1168
1169 return ret & 0xffff;
1170 }
1171
1172 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1173 {
1174 struct mv643xx_eth_shared_private *msp = bus->priv;
1175 void __iomem *smi_reg = msp->base + SMI_REG;
1176
1177 if (smi_wait_ready(msp)) {
1178 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1179 return -ETIMEDOUT;
1180 }
1181
1182 writel(SMI_OPCODE_WRITE | (reg << 21) |
1183 (addr << 16) | (val & 0xffff), smi_reg);
1184
1185 if (smi_wait_ready(msp)) {
1186 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1187 return -ETIMEDOUT;
1188 }
1189
1190 return 0;
1191 }
1192
1193
1194 /* statistics ***************************************************************/
1195 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1196 {
1197 struct mv643xx_eth_private *mp = netdev_priv(dev);
1198 struct net_device_stats *stats = &dev->stats;
1199 unsigned long tx_packets = 0;
1200 unsigned long tx_bytes = 0;
1201 unsigned long tx_dropped = 0;
1202 int i;
1203
1204 for (i = 0; i < mp->txq_count; i++) {
1205 struct tx_queue *txq = mp->txq + i;
1206
1207 tx_packets += txq->tx_packets;
1208 tx_bytes += txq->tx_bytes;
1209 tx_dropped += txq->tx_dropped;
1210 }
1211
1212 stats->tx_packets = tx_packets;
1213 stats->tx_bytes = tx_bytes;
1214 stats->tx_dropped = tx_dropped;
1215
1216 return stats;
1217 }
1218
1219 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1220 {
1221 u32 lro_aggregated = 0;
1222 u32 lro_flushed = 0;
1223 u32 lro_no_desc = 0;
1224 int i;
1225
1226 for (i = 0; i < mp->rxq_count; i++) {
1227 struct rx_queue *rxq = mp->rxq + i;
1228
1229 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1230 lro_flushed += rxq->lro_mgr.stats.flushed;
1231 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1232 }
1233
1234 mp->lro_counters.lro_aggregated = lro_aggregated;
1235 mp->lro_counters.lro_flushed = lro_flushed;
1236 mp->lro_counters.lro_no_desc = lro_no_desc;
1237 }
1238
1239 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1240 {
1241 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1242 }
1243
1244 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1245 {
1246 int i;
1247
1248 for (i = 0; i < 0x80; i += 4)
1249 mib_read(mp, i);
1250 }
1251
1252 static void mib_counters_update(struct mv643xx_eth_private *mp)
1253 {
1254 struct mib_counters *p = &mp->mib_counters;
1255
1256 spin_lock_bh(&mp->mib_counters_lock);
1257 p->good_octets_received += mib_read(mp, 0x00);
1258 p->bad_octets_received += mib_read(mp, 0x08);
1259 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1260 p->good_frames_received += mib_read(mp, 0x10);
1261 p->bad_frames_received += mib_read(mp, 0x14);
1262 p->broadcast_frames_received += mib_read(mp, 0x18);
1263 p->multicast_frames_received += mib_read(mp, 0x1c);
1264 p->frames_64_octets += mib_read(mp, 0x20);
1265 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1266 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1267 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1268 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1269 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1270 p->good_octets_sent += mib_read(mp, 0x38);
1271 p->good_frames_sent += mib_read(mp, 0x40);
1272 p->excessive_collision += mib_read(mp, 0x44);
1273 p->multicast_frames_sent += mib_read(mp, 0x48);
1274 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1275 p->unrec_mac_control_received += mib_read(mp, 0x50);
1276 p->fc_sent += mib_read(mp, 0x54);
1277 p->good_fc_received += mib_read(mp, 0x58);
1278 p->bad_fc_received += mib_read(mp, 0x5c);
1279 p->undersize_received += mib_read(mp, 0x60);
1280 p->fragments_received += mib_read(mp, 0x64);
1281 p->oversize_received += mib_read(mp, 0x68);
1282 p->jabber_received += mib_read(mp, 0x6c);
1283 p->mac_receive_error += mib_read(mp, 0x70);
1284 p->bad_crc_event += mib_read(mp, 0x74);
1285 p->collision += mib_read(mp, 0x78);
1286 p->late_collision += mib_read(mp, 0x7c);
1287 spin_unlock_bh(&mp->mib_counters_lock);
1288
1289 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1290 }
1291
1292 static void mib_counters_timer_wrapper(unsigned long _mp)
1293 {
1294 struct mv643xx_eth_private *mp = (void *)_mp;
1295
1296 mib_counters_update(mp);
1297 }
1298
1299
1300 /* interrupt coalescing *****************************************************/
1301 /*
1302 * Hardware coalescing parameters are set in units of 64 t_clk
1303 * cycles. I.e.:
1304 *
1305 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1306 *
1307 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1308 *
1309 * In the ->set*() methods, we round the computed register value
1310 * to the nearest integer.
1311 */
1312 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1313 {
1314 u32 val = rdlp(mp, SDMA_CONFIG);
1315 u64 temp;
1316
1317 if (mp->shared->extended_rx_coal_limit)
1318 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1319 else
1320 temp = (val & 0x003fff00) >> 8;
1321
1322 temp *= 64000000;
1323 do_div(temp, mp->shared->t_clk);
1324
1325 return (unsigned int)temp;
1326 }
1327
1328 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1329 {
1330 u64 temp;
1331 u32 val;
1332
1333 temp = (u64)usec * mp->shared->t_clk;
1334 temp += 31999999;
1335 do_div(temp, 64000000);
1336
1337 val = rdlp(mp, SDMA_CONFIG);
1338 if (mp->shared->extended_rx_coal_limit) {
1339 if (temp > 0xffff)
1340 temp = 0xffff;
1341 val &= ~0x023fff80;
1342 val |= (temp & 0x8000) << 10;
1343 val |= (temp & 0x7fff) << 7;
1344 } else {
1345 if (temp > 0x3fff)
1346 temp = 0x3fff;
1347 val &= ~0x003fff00;
1348 val |= (temp & 0x3fff) << 8;
1349 }
1350 wrlp(mp, SDMA_CONFIG, val);
1351 }
1352
1353 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1354 {
1355 u64 temp;
1356
1357 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1358 temp *= 64000000;
1359 do_div(temp, mp->shared->t_clk);
1360
1361 return (unsigned int)temp;
1362 }
1363
1364 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1365 {
1366 u64 temp;
1367
1368 temp = (u64)usec * mp->shared->t_clk;
1369 temp += 31999999;
1370 do_div(temp, 64000000);
1371
1372 if (temp > 0x3fff)
1373 temp = 0x3fff;
1374
1375 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1376 }
1377
1378
1379 /* ethtool ******************************************************************/
1380 struct mv643xx_eth_stats {
1381 char stat_string[ETH_GSTRING_LEN];
1382 int sizeof_stat;
1383 int netdev_off;
1384 int mp_off;
1385 };
1386
1387 #define SSTAT(m) \
1388 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1389 offsetof(struct net_device, stats.m), -1 }
1390
1391 #define MIBSTAT(m) \
1392 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1393 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1394
1395 #define LROSTAT(m) \
1396 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1397 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1398
1399 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1400 SSTAT(rx_packets),
1401 SSTAT(tx_packets),
1402 SSTAT(rx_bytes),
1403 SSTAT(tx_bytes),
1404 SSTAT(rx_errors),
1405 SSTAT(tx_errors),
1406 SSTAT(rx_dropped),
1407 SSTAT(tx_dropped),
1408 MIBSTAT(good_octets_received),
1409 MIBSTAT(bad_octets_received),
1410 MIBSTAT(internal_mac_transmit_err),
1411 MIBSTAT(good_frames_received),
1412 MIBSTAT(bad_frames_received),
1413 MIBSTAT(broadcast_frames_received),
1414 MIBSTAT(multicast_frames_received),
1415 MIBSTAT(frames_64_octets),
1416 MIBSTAT(frames_65_to_127_octets),
1417 MIBSTAT(frames_128_to_255_octets),
1418 MIBSTAT(frames_256_to_511_octets),
1419 MIBSTAT(frames_512_to_1023_octets),
1420 MIBSTAT(frames_1024_to_max_octets),
1421 MIBSTAT(good_octets_sent),
1422 MIBSTAT(good_frames_sent),
1423 MIBSTAT(excessive_collision),
1424 MIBSTAT(multicast_frames_sent),
1425 MIBSTAT(broadcast_frames_sent),
1426 MIBSTAT(unrec_mac_control_received),
1427 MIBSTAT(fc_sent),
1428 MIBSTAT(good_fc_received),
1429 MIBSTAT(bad_fc_received),
1430 MIBSTAT(undersize_received),
1431 MIBSTAT(fragments_received),
1432 MIBSTAT(oversize_received),
1433 MIBSTAT(jabber_received),
1434 MIBSTAT(mac_receive_error),
1435 MIBSTAT(bad_crc_event),
1436 MIBSTAT(collision),
1437 MIBSTAT(late_collision),
1438 LROSTAT(lro_aggregated),
1439 LROSTAT(lro_flushed),
1440 LROSTAT(lro_no_desc),
1441 };
1442
1443 static int
1444 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1445 struct ethtool_cmd *cmd)
1446 {
1447 int err;
1448
1449 err = phy_read_status(mp->phy);
1450 if (err == 0)
1451 err = phy_ethtool_gset(mp->phy, cmd);
1452
1453 /*
1454 * The MAC does not support 1000baseT_Half.
1455 */
1456 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1457 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1458
1459 return err;
1460 }
1461
1462 static int
1463 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1464 struct ethtool_cmd *cmd)
1465 {
1466 u32 port_status;
1467
1468 port_status = rdlp(mp, PORT_STATUS);
1469
1470 cmd->supported = SUPPORTED_MII;
1471 cmd->advertising = ADVERTISED_MII;
1472 switch (port_status & PORT_SPEED_MASK) {
1473 case PORT_SPEED_10:
1474 cmd->speed = SPEED_10;
1475 break;
1476 case PORT_SPEED_100:
1477 cmd->speed = SPEED_100;
1478 break;
1479 case PORT_SPEED_1000:
1480 cmd->speed = SPEED_1000;
1481 break;
1482 default:
1483 cmd->speed = -1;
1484 break;
1485 }
1486 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1487 cmd->port = PORT_MII;
1488 cmd->phy_address = 0;
1489 cmd->transceiver = XCVR_INTERNAL;
1490 cmd->autoneg = AUTONEG_DISABLE;
1491 cmd->maxtxpkt = 1;
1492 cmd->maxrxpkt = 1;
1493
1494 return 0;
1495 }
1496
1497 static int
1498 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1499 {
1500 struct mv643xx_eth_private *mp = netdev_priv(dev);
1501
1502 if (mp->phy != NULL)
1503 return mv643xx_eth_get_settings_phy(mp, cmd);
1504 else
1505 return mv643xx_eth_get_settings_phyless(mp, cmd);
1506 }
1507
1508 static int
1509 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1510 {
1511 struct mv643xx_eth_private *mp = netdev_priv(dev);
1512
1513 if (mp->phy == NULL)
1514 return -EINVAL;
1515
1516 /*
1517 * The MAC does not support 1000baseT_Half.
1518 */
1519 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1520
1521 return phy_ethtool_sset(mp->phy, cmd);
1522 }
1523
1524 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1525 struct ethtool_drvinfo *drvinfo)
1526 {
1527 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1528 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1529 strncpy(drvinfo->fw_version, "N/A", 32);
1530 strncpy(drvinfo->bus_info, "platform", 32);
1531 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1532 }
1533
1534 static int mv643xx_eth_nway_reset(struct net_device *dev)
1535 {
1536 struct mv643xx_eth_private *mp = netdev_priv(dev);
1537
1538 if (mp->phy == NULL)
1539 return -EINVAL;
1540
1541 return genphy_restart_aneg(mp->phy);
1542 }
1543
1544 static u32 mv643xx_eth_get_link(struct net_device *dev)
1545 {
1546 return !!netif_carrier_ok(dev);
1547 }
1548
1549 static int
1550 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1551 {
1552 struct mv643xx_eth_private *mp = netdev_priv(dev);
1553
1554 ec->rx_coalesce_usecs = get_rx_coal(mp);
1555 ec->tx_coalesce_usecs = get_tx_coal(mp);
1556
1557 return 0;
1558 }
1559
1560 static int
1561 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1562 {
1563 struct mv643xx_eth_private *mp = netdev_priv(dev);
1564
1565 set_rx_coal(mp, ec->rx_coalesce_usecs);
1566 set_tx_coal(mp, ec->tx_coalesce_usecs);
1567
1568 return 0;
1569 }
1570
1571 static void
1572 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1573 {
1574 struct mv643xx_eth_private *mp = netdev_priv(dev);
1575
1576 er->rx_max_pending = 4096;
1577 er->tx_max_pending = 4096;
1578 er->rx_mini_max_pending = 0;
1579 er->rx_jumbo_max_pending = 0;
1580
1581 er->rx_pending = mp->rx_ring_size;
1582 er->tx_pending = mp->tx_ring_size;
1583 er->rx_mini_pending = 0;
1584 er->rx_jumbo_pending = 0;
1585 }
1586
1587 static int
1588 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1589 {
1590 struct mv643xx_eth_private *mp = netdev_priv(dev);
1591
1592 if (er->rx_mini_pending || er->rx_jumbo_pending)
1593 return -EINVAL;
1594
1595 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1596 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1597
1598 if (netif_running(dev)) {
1599 mv643xx_eth_stop(dev);
1600 if (mv643xx_eth_open(dev)) {
1601 dev_printk(KERN_ERR, &dev->dev,
1602 "fatal error on re-opening device after "
1603 "ring param change\n");
1604 return -ENOMEM;
1605 }
1606 }
1607
1608 return 0;
1609 }
1610
1611 static u32
1612 mv643xx_eth_get_rx_csum(struct net_device *dev)
1613 {
1614 struct mv643xx_eth_private *mp = netdev_priv(dev);
1615
1616 return !!(rdlp(mp, PORT_CONFIG) & 0x02000000);
1617 }
1618
1619 static int
1620 mv643xx_eth_set_rx_csum(struct net_device *dev, u32 rx_csum)
1621 {
1622 struct mv643xx_eth_private *mp = netdev_priv(dev);
1623
1624 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1625
1626 return 0;
1627 }
1628
1629 static void mv643xx_eth_get_strings(struct net_device *dev,
1630 uint32_t stringset, uint8_t *data)
1631 {
1632 int i;
1633
1634 if (stringset == ETH_SS_STATS) {
1635 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1636 memcpy(data + i * ETH_GSTRING_LEN,
1637 mv643xx_eth_stats[i].stat_string,
1638 ETH_GSTRING_LEN);
1639 }
1640 }
1641 }
1642
1643 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1644 struct ethtool_stats *stats,
1645 uint64_t *data)
1646 {
1647 struct mv643xx_eth_private *mp = netdev_priv(dev);
1648 int i;
1649
1650 mv643xx_eth_get_stats(dev);
1651 mib_counters_update(mp);
1652 mv643xx_eth_grab_lro_stats(mp);
1653
1654 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1655 const struct mv643xx_eth_stats *stat;
1656 void *p;
1657
1658 stat = mv643xx_eth_stats + i;
1659
1660 if (stat->netdev_off >= 0)
1661 p = ((void *)mp->dev) + stat->netdev_off;
1662 else
1663 p = ((void *)mp) + stat->mp_off;
1664
1665 data[i] = (stat->sizeof_stat == 8) ?
1666 *(uint64_t *)p : *(uint32_t *)p;
1667 }
1668 }
1669
1670 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1671 {
1672 if (sset == ETH_SS_STATS)
1673 return ARRAY_SIZE(mv643xx_eth_stats);
1674
1675 return -EOPNOTSUPP;
1676 }
1677
1678 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1679 .get_settings = mv643xx_eth_get_settings,
1680 .set_settings = mv643xx_eth_set_settings,
1681 .get_drvinfo = mv643xx_eth_get_drvinfo,
1682 .nway_reset = mv643xx_eth_nway_reset,
1683 .get_link = mv643xx_eth_get_link,
1684 .get_coalesce = mv643xx_eth_get_coalesce,
1685 .set_coalesce = mv643xx_eth_set_coalesce,
1686 .get_ringparam = mv643xx_eth_get_ringparam,
1687 .set_ringparam = mv643xx_eth_set_ringparam,
1688 .get_rx_csum = mv643xx_eth_get_rx_csum,
1689 .set_rx_csum = mv643xx_eth_set_rx_csum,
1690 .set_tx_csum = ethtool_op_set_tx_csum,
1691 .set_sg = ethtool_op_set_sg,
1692 .get_strings = mv643xx_eth_get_strings,
1693 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1694 .get_flags = ethtool_op_get_flags,
1695 .set_flags = ethtool_op_set_flags,
1696 .get_sset_count = mv643xx_eth_get_sset_count,
1697 };
1698
1699
1700 /* address handling *********************************************************/
1701 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1702 {
1703 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1704 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1705
1706 addr[0] = (mac_h >> 24) & 0xff;
1707 addr[1] = (mac_h >> 16) & 0xff;
1708 addr[2] = (mac_h >> 8) & 0xff;
1709 addr[3] = mac_h & 0xff;
1710 addr[4] = (mac_l >> 8) & 0xff;
1711 addr[5] = mac_l & 0xff;
1712 }
1713
1714 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1715 {
1716 wrlp(mp, MAC_ADDR_HIGH,
1717 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1718 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1719 }
1720
1721 static u32 uc_addr_filter_mask(struct net_device *dev)
1722 {
1723 struct dev_addr_list *uc_ptr;
1724 u32 nibbles;
1725
1726 if (dev->flags & IFF_PROMISC)
1727 return 0;
1728
1729 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1730 for (uc_ptr = dev->uc_list; uc_ptr != NULL; uc_ptr = uc_ptr->next) {
1731 if (memcmp(dev->dev_addr, uc_ptr->da_addr, 5))
1732 return 0;
1733 if ((dev->dev_addr[5] ^ uc_ptr->da_addr[5]) & 0xf0)
1734 return 0;
1735
1736 nibbles |= 1 << (uc_ptr->da_addr[5] & 0x0f);
1737 }
1738
1739 return nibbles;
1740 }
1741
1742 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1743 {
1744 struct mv643xx_eth_private *mp = netdev_priv(dev);
1745 u32 port_config;
1746 u32 nibbles;
1747 int i;
1748
1749 uc_addr_set(mp, dev->dev_addr);
1750
1751 port_config = rdlp(mp, PORT_CONFIG);
1752 nibbles = uc_addr_filter_mask(dev);
1753 if (!nibbles) {
1754 port_config |= UNICAST_PROMISCUOUS_MODE;
1755 wrlp(mp, PORT_CONFIG, port_config);
1756 return;
1757 }
1758
1759 for (i = 0; i < 16; i += 4) {
1760 int off = UNICAST_TABLE(mp->port_num) + i;
1761 u32 v;
1762
1763 v = 0;
1764 if (nibbles & 1)
1765 v |= 0x00000001;
1766 if (nibbles & 2)
1767 v |= 0x00000100;
1768 if (nibbles & 4)
1769 v |= 0x00010000;
1770 if (nibbles & 8)
1771 v |= 0x01000000;
1772 nibbles >>= 4;
1773
1774 wrl(mp, off, v);
1775 }
1776
1777 port_config &= ~UNICAST_PROMISCUOUS_MODE;
1778 wrlp(mp, PORT_CONFIG, port_config);
1779 }
1780
1781 static int addr_crc(unsigned char *addr)
1782 {
1783 int crc = 0;
1784 int i;
1785
1786 for (i = 0; i < 6; i++) {
1787 int j;
1788
1789 crc = (crc ^ addr[i]) << 8;
1790 for (j = 7; j >= 0; j--) {
1791 if (crc & (0x100 << j))
1792 crc ^= 0x107 << j;
1793 }
1794 }
1795
1796 return crc;
1797 }
1798
1799 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1800 {
1801 struct mv643xx_eth_private *mp = netdev_priv(dev);
1802 u32 *mc_spec;
1803 u32 *mc_other;
1804 struct dev_addr_list *addr;
1805 int i;
1806
1807 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1808 int port_num;
1809 u32 accept;
1810 int i;
1811
1812 oom:
1813 port_num = mp->port_num;
1814 accept = 0x01010101;
1815 for (i = 0; i < 0x100; i += 4) {
1816 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1817 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1818 }
1819 return;
1820 }
1821
1822 mc_spec = kmalloc(0x200, GFP_ATOMIC);
1823 if (mc_spec == NULL)
1824 goto oom;
1825 mc_other = mc_spec + (0x100 >> 2);
1826
1827 memset(mc_spec, 0, 0x100);
1828 memset(mc_other, 0, 0x100);
1829
1830 for (addr = dev->mc_list; addr != NULL; addr = addr->next) {
1831 u8 *a = addr->da_addr;
1832 u32 *table;
1833 int entry;
1834
1835 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1836 table = mc_spec;
1837 entry = a[5];
1838 } else {
1839 table = mc_other;
1840 entry = addr_crc(a);
1841 }
1842
1843 table[entry >> 2] |= 1 << (8 * (entry & 3));
1844 }
1845
1846 for (i = 0; i < 0x100; i += 4) {
1847 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]);
1848 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]);
1849 }
1850
1851 kfree(mc_spec);
1852 }
1853
1854 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1855 {
1856 mv643xx_eth_program_unicast_filter(dev);
1857 mv643xx_eth_program_multicast_filter(dev);
1858 }
1859
1860 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1861 {
1862 struct sockaddr *sa = addr;
1863
1864 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1865
1866 netif_addr_lock_bh(dev);
1867 mv643xx_eth_program_unicast_filter(dev);
1868 netif_addr_unlock_bh(dev);
1869
1870 return 0;
1871 }
1872
1873
1874 /* rx/tx queue initialisation ***********************************************/
1875 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1876 {
1877 struct rx_queue *rxq = mp->rxq + index;
1878 struct rx_desc *rx_desc;
1879 int size;
1880 int i;
1881
1882 rxq->index = index;
1883
1884 rxq->rx_ring_size = mp->rx_ring_size;
1885
1886 rxq->rx_desc_count = 0;
1887 rxq->rx_curr_desc = 0;
1888 rxq->rx_used_desc = 0;
1889
1890 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1891
1892 if (index == 0 && size <= mp->rx_desc_sram_size) {
1893 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1894 mp->rx_desc_sram_size);
1895 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1896 } else {
1897 rxq->rx_desc_area = dma_alloc_coherent(NULL, size,
1898 &rxq->rx_desc_dma,
1899 GFP_KERNEL);
1900 }
1901
1902 if (rxq->rx_desc_area == NULL) {
1903 dev_printk(KERN_ERR, &mp->dev->dev,
1904 "can't allocate rx ring (%d bytes)\n", size);
1905 goto out;
1906 }
1907 memset(rxq->rx_desc_area, 0, size);
1908
1909 rxq->rx_desc_area_size = size;
1910 rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1911 GFP_KERNEL);
1912 if (rxq->rx_skb == NULL) {
1913 dev_printk(KERN_ERR, &mp->dev->dev,
1914 "can't allocate rx skb ring\n");
1915 goto out_free;
1916 }
1917
1918 rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1919 for (i = 0; i < rxq->rx_ring_size; i++) {
1920 int nexti;
1921
1922 nexti = i + 1;
1923 if (nexti == rxq->rx_ring_size)
1924 nexti = 0;
1925
1926 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1927 nexti * sizeof(struct rx_desc);
1928 }
1929
1930 rxq->lro_mgr.dev = mp->dev;
1931 memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats));
1932 rxq->lro_mgr.features = LRO_F_NAPI;
1933 rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1934 rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1935 rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr);
1936 rxq->lro_mgr.max_aggr = 32;
1937 rxq->lro_mgr.frag_align_pad = 0;
1938 rxq->lro_mgr.lro_arr = rxq->lro_arr;
1939 rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header;
1940
1941 memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr));
1942
1943 return 0;
1944
1945
1946 out_free:
1947 if (index == 0 && size <= mp->rx_desc_sram_size)
1948 iounmap(rxq->rx_desc_area);
1949 else
1950 dma_free_coherent(NULL, size,
1951 rxq->rx_desc_area,
1952 rxq->rx_desc_dma);
1953
1954 out:
1955 return -ENOMEM;
1956 }
1957
1958 static void rxq_deinit(struct rx_queue *rxq)
1959 {
1960 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1961 int i;
1962
1963 rxq_disable(rxq);
1964
1965 for (i = 0; i < rxq->rx_ring_size; i++) {
1966 if (rxq->rx_skb[i]) {
1967 dev_kfree_skb(rxq->rx_skb[i]);
1968 rxq->rx_desc_count--;
1969 }
1970 }
1971
1972 if (rxq->rx_desc_count) {
1973 dev_printk(KERN_ERR, &mp->dev->dev,
1974 "error freeing rx ring -- %d skbs stuck\n",
1975 rxq->rx_desc_count);
1976 }
1977
1978 if (rxq->index == 0 &&
1979 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1980 iounmap(rxq->rx_desc_area);
1981 else
1982 dma_free_coherent(NULL, rxq->rx_desc_area_size,
1983 rxq->rx_desc_area, rxq->rx_desc_dma);
1984
1985 kfree(rxq->rx_skb);
1986 }
1987
1988 static int txq_init(struct mv643xx_eth_private *mp, int index)
1989 {
1990 struct tx_queue *txq = mp->txq + index;
1991 struct tx_desc *tx_desc;
1992 int size;
1993 int i;
1994
1995 txq->index = index;
1996
1997 txq->tx_ring_size = mp->tx_ring_size;
1998
1999 txq->tx_desc_count = 0;
2000 txq->tx_curr_desc = 0;
2001 txq->tx_used_desc = 0;
2002
2003 size = txq->tx_ring_size * sizeof(struct tx_desc);
2004
2005 if (index == 0 && size <= mp->tx_desc_sram_size) {
2006 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
2007 mp->tx_desc_sram_size);
2008 txq->tx_desc_dma = mp->tx_desc_sram_addr;
2009 } else {
2010 txq->tx_desc_area = dma_alloc_coherent(NULL, size,
2011 &txq->tx_desc_dma,
2012 GFP_KERNEL);
2013 }
2014
2015 if (txq->tx_desc_area == NULL) {
2016 dev_printk(KERN_ERR, &mp->dev->dev,
2017 "can't allocate tx ring (%d bytes)\n", size);
2018 return -ENOMEM;
2019 }
2020 memset(txq->tx_desc_area, 0, size);
2021
2022 txq->tx_desc_area_size = size;
2023
2024 tx_desc = (struct tx_desc *)txq->tx_desc_area;
2025 for (i = 0; i < txq->tx_ring_size; i++) {
2026 struct tx_desc *txd = tx_desc + i;
2027 int nexti;
2028
2029 nexti = i + 1;
2030 if (nexti == txq->tx_ring_size)
2031 nexti = 0;
2032
2033 txd->cmd_sts = 0;
2034 txd->next_desc_ptr = txq->tx_desc_dma +
2035 nexti * sizeof(struct tx_desc);
2036 }
2037
2038 skb_queue_head_init(&txq->tx_skb);
2039
2040 return 0;
2041 }
2042
2043 static void txq_deinit(struct tx_queue *txq)
2044 {
2045 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2046
2047 txq_disable(txq);
2048 txq_reclaim(txq, txq->tx_ring_size, 1);
2049
2050 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2051
2052 if (txq->index == 0 &&
2053 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2054 iounmap(txq->tx_desc_area);
2055 else
2056 dma_free_coherent(NULL, txq->tx_desc_area_size,
2057 txq->tx_desc_area, txq->tx_desc_dma);
2058 }
2059
2060
2061 /* netdev ops and related ***************************************************/
2062 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2063 {
2064 u32 int_cause;
2065 u32 int_cause_ext;
2066
2067 int_cause = rdlp(mp, INT_CAUSE) & (INT_TX_END | INT_RX | INT_EXT);
2068 if (int_cause == 0)
2069 return 0;
2070
2071 int_cause_ext = 0;
2072 if (int_cause & INT_EXT)
2073 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2074
2075 int_cause &= INT_TX_END | INT_RX;
2076 if (int_cause) {
2077 wrlp(mp, INT_CAUSE, ~int_cause);
2078 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2079 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2080 mp->work_rx |= (int_cause & INT_RX) >> 2;
2081 }
2082
2083 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2084 if (int_cause_ext) {
2085 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2086 if (int_cause_ext & INT_EXT_LINK_PHY)
2087 mp->work_link = 1;
2088 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2089 }
2090
2091 return 1;
2092 }
2093
2094 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2095 {
2096 struct net_device *dev = (struct net_device *)dev_id;
2097 struct mv643xx_eth_private *mp = netdev_priv(dev);
2098
2099 if (unlikely(!mv643xx_eth_collect_events(mp)))
2100 return IRQ_NONE;
2101
2102 wrlp(mp, INT_MASK, 0);
2103 napi_schedule(&mp->napi);
2104
2105 return IRQ_HANDLED;
2106 }
2107
2108 static void handle_link_event(struct mv643xx_eth_private *mp)
2109 {
2110 struct net_device *dev = mp->dev;
2111 u32 port_status;
2112 int speed;
2113 int duplex;
2114 int fc;
2115
2116 port_status = rdlp(mp, PORT_STATUS);
2117 if (!(port_status & LINK_UP)) {
2118 if (netif_carrier_ok(dev)) {
2119 int i;
2120
2121 printk(KERN_INFO "%s: link down\n", dev->name);
2122
2123 netif_carrier_off(dev);
2124
2125 for (i = 0; i < mp->txq_count; i++) {
2126 struct tx_queue *txq = mp->txq + i;
2127
2128 txq_reclaim(txq, txq->tx_ring_size, 1);
2129 txq_reset_hw_ptr(txq);
2130 }
2131 }
2132 return;
2133 }
2134
2135 switch (port_status & PORT_SPEED_MASK) {
2136 case PORT_SPEED_10:
2137 speed = 10;
2138 break;
2139 case PORT_SPEED_100:
2140 speed = 100;
2141 break;
2142 case PORT_SPEED_1000:
2143 speed = 1000;
2144 break;
2145 default:
2146 speed = -1;
2147 break;
2148 }
2149 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2150 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2151
2152 printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
2153 "flow control %sabled\n", dev->name,
2154 speed, duplex ? "full" : "half",
2155 fc ? "en" : "dis");
2156
2157 if (!netif_carrier_ok(dev))
2158 netif_carrier_on(dev);
2159 }
2160
2161 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2162 {
2163 struct mv643xx_eth_private *mp;
2164 int work_done;
2165
2166 mp = container_of(napi, struct mv643xx_eth_private, napi);
2167
2168 if (unlikely(mp->oom)) {
2169 mp->oom = 0;
2170 del_timer(&mp->rx_oom);
2171 }
2172
2173 work_done = 0;
2174 while (work_done < budget) {
2175 u8 queue_mask;
2176 int queue;
2177 int work_tbd;
2178
2179 if (mp->work_link) {
2180 mp->work_link = 0;
2181 handle_link_event(mp);
2182 continue;
2183 }
2184
2185 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2186 if (likely(!mp->oom))
2187 queue_mask |= mp->work_rx_refill;
2188
2189 if (!queue_mask) {
2190 if (mv643xx_eth_collect_events(mp))
2191 continue;
2192 break;
2193 }
2194
2195 queue = fls(queue_mask) - 1;
2196 queue_mask = 1 << queue;
2197
2198 work_tbd = budget - work_done;
2199 if (work_tbd > 16)
2200 work_tbd = 16;
2201
2202 if (mp->work_tx_end & queue_mask) {
2203 txq_kick(mp->txq + queue);
2204 } else if (mp->work_tx & queue_mask) {
2205 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2206 txq_maybe_wake(mp->txq + queue);
2207 } else if (mp->work_rx & queue_mask) {
2208 work_done += rxq_process(mp->rxq + queue, work_tbd);
2209 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2210 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2211 } else {
2212 BUG();
2213 }
2214 }
2215
2216 if (work_done < budget) {
2217 if (mp->oom)
2218 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2219 napi_complete(napi);
2220 wrlp(mp, INT_MASK, INT_TX_END | INT_RX | INT_EXT);
2221 }
2222
2223 return work_done;
2224 }
2225
2226 static inline void oom_timer_wrapper(unsigned long data)
2227 {
2228 struct mv643xx_eth_private *mp = (void *)data;
2229
2230 napi_schedule(&mp->napi);
2231 }
2232
2233 static void phy_reset(struct mv643xx_eth_private *mp)
2234 {
2235 int data;
2236
2237 data = phy_read(mp->phy, MII_BMCR);
2238 if (data < 0)
2239 return;
2240
2241 data |= BMCR_RESET;
2242 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2243 return;
2244
2245 do {
2246 data = phy_read(mp->phy, MII_BMCR);
2247 } while (data >= 0 && data & BMCR_RESET);
2248 }
2249
2250 static void port_start(struct mv643xx_eth_private *mp)
2251 {
2252 u32 pscr;
2253 int i;
2254
2255 /*
2256 * Perform PHY reset, if there is a PHY.
2257 */
2258 if (mp->phy != NULL) {
2259 struct ethtool_cmd cmd;
2260
2261 mv643xx_eth_get_settings(mp->dev, &cmd);
2262 phy_reset(mp);
2263 mv643xx_eth_set_settings(mp->dev, &cmd);
2264 }
2265
2266 /*
2267 * Configure basic link parameters.
2268 */
2269 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2270
2271 pscr |= SERIAL_PORT_ENABLE;
2272 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2273
2274 pscr |= DO_NOT_FORCE_LINK_FAIL;
2275 if (mp->phy == NULL)
2276 pscr |= FORCE_LINK_PASS;
2277 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2278
2279 /*
2280 * Configure TX path and queues.
2281 */
2282 tx_set_rate(mp, 1000000000, 16777216);
2283 for (i = 0; i < mp->txq_count; i++) {
2284 struct tx_queue *txq = mp->txq + i;
2285
2286 txq_reset_hw_ptr(txq);
2287 txq_set_rate(txq, 1000000000, 16777216);
2288 txq_set_fixed_prio_mode(txq);
2289 }
2290
2291 /*
2292 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2293 * frames to RX queue #0, and include the pseudo-header when
2294 * calculating receive checksums.
2295 */
2296 wrlp(mp, PORT_CONFIG, 0x02000000);
2297
2298 /*
2299 * Treat BPDUs as normal multicasts, and disable partition mode.
2300 */
2301 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2302
2303 /*
2304 * Add configured unicast addresses to address filter table.
2305 */
2306 mv643xx_eth_program_unicast_filter(mp->dev);
2307
2308 /*
2309 * Enable the receive queues.
2310 */
2311 for (i = 0; i < mp->rxq_count; i++) {
2312 struct rx_queue *rxq = mp->rxq + i;
2313 u32 addr;
2314
2315 addr = (u32)rxq->rx_desc_dma;
2316 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2317 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2318
2319 rxq_enable(rxq);
2320 }
2321 }
2322
2323 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2324 {
2325 int skb_size;
2326
2327 /*
2328 * Reserve 2+14 bytes for an ethernet header (the hardware
2329 * automatically prepends 2 bytes of dummy data to each
2330 * received packet), 16 bytes for up to four VLAN tags, and
2331 * 4 bytes for the trailing FCS -- 36 bytes total.
2332 */
2333 skb_size = mp->dev->mtu + 36;
2334
2335 /*
2336 * Make sure that the skb size is a multiple of 8 bytes, as
2337 * the lower three bits of the receive descriptor's buffer
2338 * size field are ignored by the hardware.
2339 */
2340 mp->skb_size = (skb_size + 7) & ~7;
2341 }
2342
2343 static int mv643xx_eth_open(struct net_device *dev)
2344 {
2345 struct mv643xx_eth_private *mp = netdev_priv(dev);
2346 int err;
2347 int i;
2348
2349 wrlp(mp, INT_CAUSE, 0);
2350 wrlp(mp, INT_CAUSE_EXT, 0);
2351 rdlp(mp, INT_CAUSE_EXT);
2352
2353 err = request_irq(dev->irq, mv643xx_eth_irq,
2354 IRQF_SHARED, dev->name, dev);
2355 if (err) {
2356 dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
2357 return -EAGAIN;
2358 }
2359
2360 mv643xx_eth_recalc_skb_size(mp);
2361
2362 napi_enable(&mp->napi);
2363
2364 skb_queue_head_init(&mp->rx_recycle);
2365
2366 for (i = 0; i < mp->rxq_count; i++) {
2367 err = rxq_init(mp, i);
2368 if (err) {
2369 while (--i >= 0)
2370 rxq_deinit(mp->rxq + i);
2371 goto out;
2372 }
2373
2374 rxq_refill(mp->rxq + i, INT_MAX);
2375 }
2376
2377 if (mp->oom) {
2378 mp->rx_oom.expires = jiffies + (HZ / 10);
2379 add_timer(&mp->rx_oom);
2380 }
2381
2382 for (i = 0; i < mp->txq_count; i++) {
2383 err = txq_init(mp, i);
2384 if (err) {
2385 while (--i >= 0)
2386 txq_deinit(mp->txq + i);
2387 goto out_free;
2388 }
2389 }
2390
2391 port_start(mp);
2392
2393 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2394 wrlp(mp, INT_MASK, INT_TX_END | INT_RX | INT_EXT);
2395
2396 return 0;
2397
2398
2399 out_free:
2400 for (i = 0; i < mp->rxq_count; i++)
2401 rxq_deinit(mp->rxq + i);
2402 out:
2403 free_irq(dev->irq, dev);
2404
2405 return err;
2406 }
2407
2408 static void port_reset(struct mv643xx_eth_private *mp)
2409 {
2410 unsigned int data;
2411 int i;
2412
2413 for (i = 0; i < mp->rxq_count; i++)
2414 rxq_disable(mp->rxq + i);
2415 for (i = 0; i < mp->txq_count; i++)
2416 txq_disable(mp->txq + i);
2417
2418 while (1) {
2419 u32 ps = rdlp(mp, PORT_STATUS);
2420
2421 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2422 break;
2423 udelay(10);
2424 }
2425
2426 /* Reset the Enable bit in the Configuration Register */
2427 data = rdlp(mp, PORT_SERIAL_CONTROL);
2428 data &= ~(SERIAL_PORT_ENABLE |
2429 DO_NOT_FORCE_LINK_FAIL |
2430 FORCE_LINK_PASS);
2431 wrlp(mp, PORT_SERIAL_CONTROL, data);
2432 }
2433
2434 static int mv643xx_eth_stop(struct net_device *dev)
2435 {
2436 struct mv643xx_eth_private *mp = netdev_priv(dev);
2437 int i;
2438
2439 wrlp(mp, INT_MASK_EXT, 0x00000000);
2440 wrlp(mp, INT_MASK, 0x00000000);
2441 rdlp(mp, INT_MASK);
2442
2443 napi_disable(&mp->napi);
2444
2445 del_timer_sync(&mp->rx_oom);
2446
2447 netif_carrier_off(dev);
2448
2449 free_irq(dev->irq, dev);
2450
2451 port_reset(mp);
2452 mv643xx_eth_get_stats(dev);
2453 mib_counters_update(mp);
2454 del_timer_sync(&mp->mib_counters_timer);
2455
2456 skb_queue_purge(&mp->rx_recycle);
2457
2458 for (i = 0; i < mp->rxq_count; i++)
2459 rxq_deinit(mp->rxq + i);
2460 for (i = 0; i < mp->txq_count; i++)
2461 txq_deinit(mp->txq + i);
2462
2463 return 0;
2464 }
2465
2466 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2467 {
2468 struct mv643xx_eth_private *mp = netdev_priv(dev);
2469
2470 if (mp->phy != NULL)
2471 return phy_mii_ioctl(mp->phy, if_mii(ifr), cmd);
2472
2473 return -EOPNOTSUPP;
2474 }
2475
2476 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2477 {
2478 struct mv643xx_eth_private *mp = netdev_priv(dev);
2479
2480 if (new_mtu < 64 || new_mtu > 9500)
2481 return -EINVAL;
2482
2483 dev->mtu = new_mtu;
2484 mv643xx_eth_recalc_skb_size(mp);
2485 tx_set_rate(mp, 1000000000, 16777216);
2486
2487 if (!netif_running(dev))
2488 return 0;
2489
2490 /*
2491 * Stop and then re-open the interface. This will allocate RX
2492 * skbs of the new MTU.
2493 * There is a possible danger that the open will not succeed,
2494 * due to memory being full.
2495 */
2496 mv643xx_eth_stop(dev);
2497 if (mv643xx_eth_open(dev)) {
2498 dev_printk(KERN_ERR, &dev->dev,
2499 "fatal error on re-opening device after "
2500 "MTU change\n");
2501 }
2502
2503 return 0;
2504 }
2505
2506 static void tx_timeout_task(struct work_struct *ugly)
2507 {
2508 struct mv643xx_eth_private *mp;
2509
2510 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2511 if (netif_running(mp->dev)) {
2512 netif_tx_stop_all_queues(mp->dev);
2513 port_reset(mp);
2514 port_start(mp);
2515 netif_tx_wake_all_queues(mp->dev);
2516 }
2517 }
2518
2519 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2520 {
2521 struct mv643xx_eth_private *mp = netdev_priv(dev);
2522
2523 dev_printk(KERN_INFO, &dev->dev, "tx timeout\n");
2524
2525 schedule_work(&mp->tx_timeout_task);
2526 }
2527
2528 #ifdef CONFIG_NET_POLL_CONTROLLER
2529 static void mv643xx_eth_netpoll(struct net_device *dev)
2530 {
2531 struct mv643xx_eth_private *mp = netdev_priv(dev);
2532
2533 wrlp(mp, INT_MASK, 0x00000000);
2534 rdlp(mp, INT_MASK);
2535
2536 mv643xx_eth_irq(dev->irq, dev);
2537
2538 wrlp(mp, INT_MASK, INT_TX_END | INT_RX | INT_EXT);
2539 }
2540 #endif
2541
2542
2543 /* platform glue ************************************************************/
2544 static void
2545 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2546 struct mbus_dram_target_info *dram)
2547 {
2548 void __iomem *base = msp->base;
2549 u32 win_enable;
2550 u32 win_protect;
2551 int i;
2552
2553 for (i = 0; i < 6; i++) {
2554 writel(0, base + WINDOW_BASE(i));
2555 writel(0, base + WINDOW_SIZE(i));
2556 if (i < 4)
2557 writel(0, base + WINDOW_REMAP_HIGH(i));
2558 }
2559
2560 win_enable = 0x3f;
2561 win_protect = 0;
2562
2563 for (i = 0; i < dram->num_cs; i++) {
2564 struct mbus_dram_window *cs = dram->cs + i;
2565
2566 writel((cs->base & 0xffff0000) |
2567 (cs->mbus_attr << 8) |
2568 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2569 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2570
2571 win_enable &= ~(1 << i);
2572 win_protect |= 3 << (2 * i);
2573 }
2574
2575 writel(win_enable, base + WINDOW_BAR_ENABLE);
2576 msp->win_protect = win_protect;
2577 }
2578
2579 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2580 {
2581 /*
2582 * Check whether we have a 14-bit coal limit field in bits
2583 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2584 * SDMA config register.
2585 */
2586 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2587 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2588 msp->extended_rx_coal_limit = 1;
2589 else
2590 msp->extended_rx_coal_limit = 0;
2591
2592 /*
2593 * Check whether the MAC supports TX rate control, and if
2594 * yes, whether its associated registers are in the old or
2595 * the new place.
2596 */
2597 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2598 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2599 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2600 } else {
2601 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2602 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2603 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2604 else
2605 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2606 }
2607 }
2608
2609 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2610 {
2611 static int mv643xx_eth_version_printed;
2612 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2613 struct mv643xx_eth_shared_private *msp;
2614 struct resource *res;
2615 int ret;
2616
2617 if (!mv643xx_eth_version_printed++)
2618 printk(KERN_NOTICE "MV-643xx 10/100/1000 ethernet "
2619 "driver version %s\n", mv643xx_eth_driver_version);
2620
2621 ret = -EINVAL;
2622 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2623 if (res == NULL)
2624 goto out;
2625
2626 ret = -ENOMEM;
2627 msp = kmalloc(sizeof(*msp), GFP_KERNEL);
2628 if (msp == NULL)
2629 goto out;
2630 memset(msp, 0, sizeof(*msp));
2631
2632 msp->base = ioremap(res->start, res->end - res->start + 1);
2633 if (msp->base == NULL)
2634 goto out_free;
2635
2636 /*
2637 * Set up and register SMI bus.
2638 */
2639 if (pd == NULL || pd->shared_smi == NULL) {
2640 msp->smi_bus = mdiobus_alloc();
2641 if (msp->smi_bus == NULL)
2642 goto out_unmap;
2643
2644 msp->smi_bus->priv = msp;
2645 msp->smi_bus->name = "mv643xx_eth smi";
2646 msp->smi_bus->read = smi_bus_read;
2647 msp->smi_bus->write = smi_bus_write,
2648 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2649 msp->smi_bus->parent = &pdev->dev;
2650 msp->smi_bus->phy_mask = 0xffffffff;
2651 if (mdiobus_register(msp->smi_bus) < 0)
2652 goto out_free_mii_bus;
2653 msp->smi = msp;
2654 } else {
2655 msp->smi = platform_get_drvdata(pd->shared_smi);
2656 }
2657
2658 msp->err_interrupt = NO_IRQ;
2659 init_waitqueue_head(&msp->smi_busy_wait);
2660
2661 /*
2662 * Check whether the error interrupt is hooked up.
2663 */
2664 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2665 if (res != NULL) {
2666 int err;
2667
2668 err = request_irq(res->start, mv643xx_eth_err_irq,
2669 IRQF_SHARED, "mv643xx_eth", msp);
2670 if (!err) {
2671 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2672 msp->err_interrupt = res->start;
2673 }
2674 }
2675
2676 /*
2677 * (Re-)program MBUS remapping windows if we are asked to.
2678 */
2679 if (pd != NULL && pd->dram != NULL)
2680 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2681
2682 /*
2683 * Detect hardware parameters.
2684 */
2685 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2686 infer_hw_params(msp);
2687
2688 platform_set_drvdata(pdev, msp);
2689
2690 return 0;
2691
2692 out_free_mii_bus:
2693 mdiobus_free(msp->smi_bus);
2694 out_unmap:
2695 iounmap(msp->base);
2696 out_free:
2697 kfree(msp);
2698 out:
2699 return ret;
2700 }
2701
2702 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2703 {
2704 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2705 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2706
2707 if (pd == NULL || pd->shared_smi == NULL) {
2708 mdiobus_unregister(msp->smi_bus);
2709 mdiobus_free(msp->smi_bus);
2710 }
2711 if (msp->err_interrupt != NO_IRQ)
2712 free_irq(msp->err_interrupt, msp);
2713 iounmap(msp->base);
2714 kfree(msp);
2715
2716 return 0;
2717 }
2718
2719 static struct platform_driver mv643xx_eth_shared_driver = {
2720 .probe = mv643xx_eth_shared_probe,
2721 .remove = mv643xx_eth_shared_remove,
2722 .driver = {
2723 .name = MV643XX_ETH_SHARED_NAME,
2724 .owner = THIS_MODULE,
2725 },
2726 };
2727
2728 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2729 {
2730 int addr_shift = 5 * mp->port_num;
2731 u32 data;
2732
2733 data = rdl(mp, PHY_ADDR);
2734 data &= ~(0x1f << addr_shift);
2735 data |= (phy_addr & 0x1f) << addr_shift;
2736 wrl(mp, PHY_ADDR, data);
2737 }
2738
2739 static int phy_addr_get(struct mv643xx_eth_private *mp)
2740 {
2741 unsigned int data;
2742
2743 data = rdl(mp, PHY_ADDR);
2744
2745 return (data >> (5 * mp->port_num)) & 0x1f;
2746 }
2747
2748 static void set_params(struct mv643xx_eth_private *mp,
2749 struct mv643xx_eth_platform_data *pd)
2750 {
2751 struct net_device *dev = mp->dev;
2752
2753 if (is_valid_ether_addr(pd->mac_addr))
2754 memcpy(dev->dev_addr, pd->mac_addr, 6);
2755 else
2756 uc_addr_get(mp, dev->dev_addr);
2757
2758 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2759 if (pd->rx_queue_size)
2760 mp->rx_ring_size = pd->rx_queue_size;
2761 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2762 mp->rx_desc_sram_size = pd->rx_sram_size;
2763
2764 mp->rxq_count = pd->rx_queue_count ? : 1;
2765
2766 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2767 if (pd->tx_queue_size)
2768 mp->tx_ring_size = pd->tx_queue_size;
2769 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2770 mp->tx_desc_sram_size = pd->tx_sram_size;
2771
2772 mp->txq_count = pd->tx_queue_count ? : 1;
2773 }
2774
2775 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2776 int phy_addr)
2777 {
2778 struct mii_bus *bus = mp->shared->smi->smi_bus;
2779 struct phy_device *phydev;
2780 int start;
2781 int num;
2782 int i;
2783
2784 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2785 start = phy_addr_get(mp) & 0x1f;
2786 num = 32;
2787 } else {
2788 start = phy_addr & 0x1f;
2789 num = 1;
2790 }
2791
2792 phydev = NULL;
2793 for (i = 0; i < num; i++) {
2794 int addr = (start + i) & 0x1f;
2795
2796 if (bus->phy_map[addr] == NULL)
2797 mdiobus_scan(bus, addr);
2798
2799 if (phydev == NULL) {
2800 phydev = bus->phy_map[addr];
2801 if (phydev != NULL)
2802 phy_addr_set(mp, addr);
2803 }
2804 }
2805
2806 return phydev;
2807 }
2808
2809 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2810 {
2811 struct phy_device *phy = mp->phy;
2812
2813 phy_reset(mp);
2814
2815 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2816
2817 if (speed == 0) {
2818 phy->autoneg = AUTONEG_ENABLE;
2819 phy->speed = 0;
2820 phy->duplex = 0;
2821 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2822 } else {
2823 phy->autoneg = AUTONEG_DISABLE;
2824 phy->advertising = 0;
2825 phy->speed = speed;
2826 phy->duplex = duplex;
2827 }
2828 phy_start_aneg(phy);
2829 }
2830
2831 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2832 {
2833 u32 pscr;
2834
2835 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2836 if (pscr & SERIAL_PORT_ENABLE) {
2837 pscr &= ~SERIAL_PORT_ENABLE;
2838 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2839 }
2840
2841 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2842 if (mp->phy == NULL) {
2843 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2844 if (speed == SPEED_1000)
2845 pscr |= SET_GMII_SPEED_TO_1000;
2846 else if (speed == SPEED_100)
2847 pscr |= SET_MII_SPEED_TO_100;
2848
2849 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2850
2851 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2852 if (duplex == DUPLEX_FULL)
2853 pscr |= SET_FULL_DUPLEX_MODE;
2854 }
2855
2856 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2857 }
2858
2859 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2860 .ndo_open = mv643xx_eth_open,
2861 .ndo_stop = mv643xx_eth_stop,
2862 .ndo_start_xmit = mv643xx_eth_xmit,
2863 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2864 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2865 .ndo_do_ioctl = mv643xx_eth_ioctl,
2866 .ndo_change_mtu = mv643xx_eth_change_mtu,
2867 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2868 .ndo_get_stats = mv643xx_eth_get_stats,
2869 #ifdef CONFIG_NET_POLL_CONTROLLER
2870 .ndo_poll_controller = mv643xx_eth_netpoll,
2871 #endif
2872 };
2873
2874 static int mv643xx_eth_probe(struct platform_device *pdev)
2875 {
2876 struct mv643xx_eth_platform_data *pd;
2877 struct mv643xx_eth_private *mp;
2878 struct net_device *dev;
2879 struct resource *res;
2880 int err;
2881
2882 pd = pdev->dev.platform_data;
2883 if (pd == NULL) {
2884 dev_printk(KERN_ERR, &pdev->dev,
2885 "no mv643xx_eth_platform_data\n");
2886 return -ENODEV;
2887 }
2888
2889 if (pd->shared == NULL) {
2890 dev_printk(KERN_ERR, &pdev->dev,
2891 "no mv643xx_eth_platform_data->shared\n");
2892 return -ENODEV;
2893 }
2894
2895 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2896 if (!dev)
2897 return -ENOMEM;
2898
2899 mp = netdev_priv(dev);
2900 platform_set_drvdata(pdev, mp);
2901
2902 mp->shared = platform_get_drvdata(pd->shared);
2903 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2904 mp->port_num = pd->port_number;
2905
2906 mp->dev = dev;
2907
2908 set_params(mp, pd);
2909 dev->real_num_tx_queues = mp->txq_count;
2910
2911 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2912 mp->phy = phy_scan(mp, pd->phy_addr);
2913
2914 if (mp->phy != NULL)
2915 phy_init(mp, pd->speed, pd->duplex);
2916
2917 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2918
2919 init_pscr(mp, pd->speed, pd->duplex);
2920
2921
2922 mib_counters_clear(mp);
2923
2924 init_timer(&mp->mib_counters_timer);
2925 mp->mib_counters_timer.data = (unsigned long)mp;
2926 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2927 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2928 add_timer(&mp->mib_counters_timer);
2929
2930 spin_lock_init(&mp->mib_counters_lock);
2931
2932 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2933
2934 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2935
2936 init_timer(&mp->rx_oom);
2937 mp->rx_oom.data = (unsigned long)mp;
2938 mp->rx_oom.function = oom_timer_wrapper;
2939
2940
2941 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2942 BUG_ON(!res);
2943 dev->irq = res->start;
2944
2945 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2946
2947 dev->watchdog_timeo = 2 * HZ;
2948 dev->base_addr = 0;
2949
2950 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2951 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2952
2953 SET_NETDEV_DEV(dev, &pdev->dev);
2954
2955 if (mp->shared->win_protect)
2956 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2957
2958 netif_carrier_off(dev);
2959
2960 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2961
2962 set_rx_coal(mp, 250);
2963 set_tx_coal(mp, 0);
2964
2965 err = register_netdev(dev);
2966 if (err)
2967 goto out;
2968
2969 dev_printk(KERN_NOTICE, &dev->dev, "port %d with MAC address %pM\n",
2970 mp->port_num, dev->dev_addr);
2971
2972 if (mp->tx_desc_sram_size > 0)
2973 dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
2974
2975 return 0;
2976
2977 out:
2978 free_netdev(dev);
2979
2980 return err;
2981 }
2982
2983 static int mv643xx_eth_remove(struct platform_device *pdev)
2984 {
2985 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2986
2987 unregister_netdev(mp->dev);
2988 if (mp->phy != NULL)
2989 phy_detach(mp->phy);
2990 flush_scheduled_work();
2991 free_netdev(mp->dev);
2992
2993 platform_set_drvdata(pdev, NULL);
2994
2995 return 0;
2996 }
2997
2998 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2999 {
3000 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3001
3002 /* Mask all interrupts on ethernet port */
3003 wrlp(mp, INT_MASK, 0);
3004 rdlp(mp, INT_MASK);
3005
3006 if (netif_running(mp->dev))
3007 port_reset(mp);
3008 }
3009
3010 static struct platform_driver mv643xx_eth_driver = {
3011 .probe = mv643xx_eth_probe,
3012 .remove = mv643xx_eth_remove,
3013 .shutdown = mv643xx_eth_shutdown,
3014 .driver = {
3015 .name = MV643XX_ETH_NAME,
3016 .owner = THIS_MODULE,
3017 },
3018 };
3019
3020 static int __init mv643xx_eth_init_module(void)
3021 {
3022 int rc;
3023
3024 rc = platform_driver_register(&mv643xx_eth_shared_driver);
3025 if (!rc) {
3026 rc = platform_driver_register(&mv643xx_eth_driver);
3027 if (rc)
3028 platform_driver_unregister(&mv643xx_eth_shared_driver);
3029 }
3030
3031 return rc;
3032 }
3033 module_init(mv643xx_eth_init_module);
3034
3035 static void __exit mv643xx_eth_cleanup_module(void)
3036 {
3037 platform_driver_unregister(&mv643xx_eth_driver);
3038 platform_driver_unregister(&mv643xx_eth_shared_driver);
3039 }
3040 module_exit(mv643xx_eth_cleanup_module);
3041
3042 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3043 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3044 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3045 MODULE_LICENSE("GPL");
3046 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3047 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree