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netdev: convert bulk of drivers to netdev_tx_t
[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 <asm/system.h>
58 #include <linux/list.h>
59
60 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
61 static char mv643xx_eth_driver_version[] = "1.4";
62
63
64 /*
65 * Registers shared between all ports.
66 */
67 #define PHY_ADDR 0x0000
68 #define SMI_REG 0x0004
69 #define SMI_BUSY 0x10000000
70 #define SMI_READ_VALID 0x08000000
71 #define SMI_OPCODE_READ 0x04000000
72 #define SMI_OPCODE_WRITE 0x00000000
73 #define ERR_INT_CAUSE 0x0080
74 #define ERR_INT_SMI_DONE 0x00000010
75 #define ERR_INT_MASK 0x0084
76 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
77 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
78 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
79 #define WINDOW_BAR_ENABLE 0x0290
80 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
81
82 /*
83 * Main per-port registers. These live at offset 0x0400 for
84 * port #0, 0x0800 for port #1, and 0x0c00 for port #2.
85 */
86 #define PORT_CONFIG 0x0000
87 #define UNICAST_PROMISCUOUS_MODE 0x00000001
88 #define PORT_CONFIG_EXT 0x0004
89 #define MAC_ADDR_LOW 0x0014
90 #define MAC_ADDR_HIGH 0x0018
91 #define SDMA_CONFIG 0x001c
92 #define TX_BURST_SIZE_16_64BIT 0x01000000
93 #define TX_BURST_SIZE_4_64BIT 0x00800000
94 #define BLM_TX_NO_SWAP 0x00000020
95 #define BLM_RX_NO_SWAP 0x00000010
96 #define RX_BURST_SIZE_16_64BIT 0x00000008
97 #define RX_BURST_SIZE_4_64BIT 0x00000004
98 #define PORT_SERIAL_CONTROL 0x003c
99 #define SET_MII_SPEED_TO_100 0x01000000
100 #define SET_GMII_SPEED_TO_1000 0x00800000
101 #define SET_FULL_DUPLEX_MODE 0x00200000
102 #define MAX_RX_PACKET_9700BYTE 0x000a0000
103 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000
104 #define DO_NOT_FORCE_LINK_FAIL 0x00000400
105 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200
106 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008
107 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004
108 #define FORCE_LINK_PASS 0x00000002
109 #define SERIAL_PORT_ENABLE 0x00000001
110 #define PORT_STATUS 0x0044
111 #define TX_FIFO_EMPTY 0x00000400
112 #define TX_IN_PROGRESS 0x00000080
113 #define PORT_SPEED_MASK 0x00000030
114 #define PORT_SPEED_1000 0x00000010
115 #define PORT_SPEED_100 0x00000020
116 #define PORT_SPEED_10 0x00000000
117 #define FLOW_CONTROL_ENABLED 0x00000008
118 #define FULL_DUPLEX 0x00000004
119 #define LINK_UP 0x00000002
120 #define TXQ_COMMAND 0x0048
121 #define TXQ_FIX_PRIO_CONF 0x004c
122 #define TX_BW_RATE 0x0050
123 #define TX_BW_MTU 0x0058
124 #define TX_BW_BURST 0x005c
125 #define INT_CAUSE 0x0060
126 #define INT_TX_END 0x07f80000
127 #define INT_TX_END_0 0x00080000
128 #define INT_RX 0x000003fc
129 #define INT_RX_0 0x00000004
130 #define INT_EXT 0x00000002
131 #define INT_CAUSE_EXT 0x0064
132 #define INT_EXT_LINK_PHY 0x00110000
133 #define INT_EXT_TX 0x000000ff
134 #define INT_MASK 0x0068
135 #define INT_MASK_EXT 0x006c
136 #define TX_FIFO_URGENT_THRESHOLD 0x0074
137 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
138 #define TX_BW_RATE_MOVED 0x00e0
139 #define TX_BW_MTU_MOVED 0x00e8
140 #define TX_BW_BURST_MOVED 0x00ec
141 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
142 #define RXQ_COMMAND 0x0280
143 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
144 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
145 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
146 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
147
148 /*
149 * Misc per-port registers.
150 */
151 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
152 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
153 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
154 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
155
156
157 /*
158 * SDMA configuration register default value.
159 */
160 #if defined(__BIG_ENDIAN)
161 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
162 (RX_BURST_SIZE_4_64BIT | \
163 TX_BURST_SIZE_4_64BIT)
164 #elif defined(__LITTLE_ENDIAN)
165 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
166 (RX_BURST_SIZE_4_64BIT | \
167 BLM_RX_NO_SWAP | \
168 BLM_TX_NO_SWAP | \
169 TX_BURST_SIZE_4_64BIT)
170 #else
171 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
172 #endif
173
174
175 /*
176 * Misc definitions.
177 */
178 #define DEFAULT_RX_QUEUE_SIZE 128
179 #define DEFAULT_TX_QUEUE_SIZE 256
180 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
181
182
183 /*
184 * RX/TX descriptors.
185 */
186 #if defined(__BIG_ENDIAN)
187 struct rx_desc {
188 u16 byte_cnt; /* Descriptor buffer byte count */
189 u16 buf_size; /* Buffer size */
190 u32 cmd_sts; /* Descriptor command status */
191 u32 next_desc_ptr; /* Next descriptor pointer */
192 u32 buf_ptr; /* Descriptor buffer pointer */
193 };
194
195 struct tx_desc {
196 u16 byte_cnt; /* buffer byte count */
197 u16 l4i_chk; /* CPU provided TCP checksum */
198 u32 cmd_sts; /* Command/status field */
199 u32 next_desc_ptr; /* Pointer to next descriptor */
200 u32 buf_ptr; /* pointer to buffer for this descriptor*/
201 };
202 #elif defined(__LITTLE_ENDIAN)
203 struct rx_desc {
204 u32 cmd_sts; /* Descriptor command status */
205 u16 buf_size; /* Buffer size */
206 u16 byte_cnt; /* Descriptor buffer byte count */
207 u32 buf_ptr; /* Descriptor buffer pointer */
208 u32 next_desc_ptr; /* Next descriptor pointer */
209 };
210
211 struct tx_desc {
212 u32 cmd_sts; /* Command/status field */
213 u16 l4i_chk; /* CPU provided TCP checksum */
214 u16 byte_cnt; /* buffer byte count */
215 u32 buf_ptr; /* pointer to buffer for this descriptor*/
216 u32 next_desc_ptr; /* Pointer to next descriptor */
217 };
218 #else
219 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
220 #endif
221
222 /* RX & TX descriptor command */
223 #define BUFFER_OWNED_BY_DMA 0x80000000
224
225 /* RX & TX descriptor status */
226 #define ERROR_SUMMARY 0x00000001
227
228 /* RX descriptor status */
229 #define LAYER_4_CHECKSUM_OK 0x40000000
230 #define RX_ENABLE_INTERRUPT 0x20000000
231 #define RX_FIRST_DESC 0x08000000
232 #define RX_LAST_DESC 0x04000000
233 #define RX_IP_HDR_OK 0x02000000
234 #define RX_PKT_IS_IPV4 0x01000000
235 #define RX_PKT_IS_ETHERNETV2 0x00800000
236 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
237 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
238 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
239
240 /* TX descriptor command */
241 #define TX_ENABLE_INTERRUPT 0x00800000
242 #define GEN_CRC 0x00400000
243 #define TX_FIRST_DESC 0x00200000
244 #define TX_LAST_DESC 0x00100000
245 #define ZERO_PADDING 0x00080000
246 #define GEN_IP_V4_CHECKSUM 0x00040000
247 #define GEN_TCP_UDP_CHECKSUM 0x00020000
248 #define UDP_FRAME 0x00010000
249 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
250 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
251
252 #define TX_IHL_SHIFT 11
253
254
255 /* global *******************************************************************/
256 struct mv643xx_eth_shared_private {
257 /*
258 * Ethernet controller base address.
259 */
260 void __iomem *base;
261
262 /*
263 * Points at the right SMI instance to use.
264 */
265 struct mv643xx_eth_shared_private *smi;
266
267 /*
268 * Provides access to local SMI interface.
269 */
270 struct mii_bus *smi_bus;
271
272 /*
273 * If we have access to the error interrupt pin (which is
274 * somewhat misnamed as it not only reflects internal errors
275 * but also reflects SMI completion), use that to wait for
276 * SMI access completion instead of polling the SMI busy bit.
277 */
278 int err_interrupt;
279 wait_queue_head_t smi_busy_wait;
280
281 /*
282 * Per-port MBUS window access register value.
283 */
284 u32 win_protect;
285
286 /*
287 * Hardware-specific parameters.
288 */
289 unsigned int t_clk;
290 int extended_rx_coal_limit;
291 int tx_bw_control;
292 };
293
294 #define TX_BW_CONTROL_ABSENT 0
295 #define TX_BW_CONTROL_OLD_LAYOUT 1
296 #define TX_BW_CONTROL_NEW_LAYOUT 2
297
298 static int mv643xx_eth_open(struct net_device *dev);
299 static int mv643xx_eth_stop(struct net_device *dev);
300
301
302 /* per-port *****************************************************************/
303 struct mib_counters {
304 u64 good_octets_received;
305 u32 bad_octets_received;
306 u32 internal_mac_transmit_err;
307 u32 good_frames_received;
308 u32 bad_frames_received;
309 u32 broadcast_frames_received;
310 u32 multicast_frames_received;
311 u32 frames_64_octets;
312 u32 frames_65_to_127_octets;
313 u32 frames_128_to_255_octets;
314 u32 frames_256_to_511_octets;
315 u32 frames_512_to_1023_octets;
316 u32 frames_1024_to_max_octets;
317 u64 good_octets_sent;
318 u32 good_frames_sent;
319 u32 excessive_collision;
320 u32 multicast_frames_sent;
321 u32 broadcast_frames_sent;
322 u32 unrec_mac_control_received;
323 u32 fc_sent;
324 u32 good_fc_received;
325 u32 bad_fc_received;
326 u32 undersize_received;
327 u32 fragments_received;
328 u32 oversize_received;
329 u32 jabber_received;
330 u32 mac_receive_error;
331 u32 bad_crc_event;
332 u32 collision;
333 u32 late_collision;
334 };
335
336 struct lro_counters {
337 u32 lro_aggregated;
338 u32 lro_flushed;
339 u32 lro_no_desc;
340 };
341
342 struct rx_queue {
343 int index;
344
345 int rx_ring_size;
346
347 int rx_desc_count;
348 int rx_curr_desc;
349 int rx_used_desc;
350
351 struct rx_desc *rx_desc_area;
352 dma_addr_t rx_desc_dma;
353 int rx_desc_area_size;
354 struct sk_buff **rx_skb;
355
356 struct net_lro_mgr lro_mgr;
357 struct net_lro_desc lro_arr[8];
358 };
359
360 struct tx_queue {
361 int index;
362
363 int tx_ring_size;
364
365 int tx_desc_count;
366 int tx_curr_desc;
367 int tx_used_desc;
368
369 struct tx_desc *tx_desc_area;
370 dma_addr_t tx_desc_dma;
371 int tx_desc_area_size;
372
373 struct sk_buff_head tx_skb;
374
375 unsigned long tx_packets;
376 unsigned long tx_bytes;
377 unsigned long tx_dropped;
378 };
379
380 struct mv643xx_eth_private {
381 struct mv643xx_eth_shared_private *shared;
382 void __iomem *base;
383 int port_num;
384
385 struct net_device *dev;
386
387 struct phy_device *phy;
388
389 struct timer_list mib_counters_timer;
390 spinlock_t mib_counters_lock;
391 struct mib_counters mib_counters;
392
393 struct lro_counters lro_counters;
394
395 struct work_struct tx_timeout_task;
396
397 struct napi_struct napi;
398 u32 int_mask;
399 u8 oom;
400 u8 work_link;
401 u8 work_tx;
402 u8 work_tx_end;
403 u8 work_rx;
404 u8 work_rx_refill;
405
406 int skb_size;
407 struct sk_buff_head rx_recycle;
408
409 /*
410 * RX state.
411 */
412 int rx_ring_size;
413 unsigned long rx_desc_sram_addr;
414 int rx_desc_sram_size;
415 int rxq_count;
416 struct timer_list rx_oom;
417 struct rx_queue rxq[8];
418
419 /*
420 * TX state.
421 */
422 int tx_ring_size;
423 unsigned long tx_desc_sram_addr;
424 int tx_desc_sram_size;
425 int txq_count;
426 struct tx_queue txq[8];
427 };
428
429
430 /* port register accessors **************************************************/
431 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
432 {
433 return readl(mp->shared->base + offset);
434 }
435
436 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
437 {
438 return readl(mp->base + offset);
439 }
440
441 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
442 {
443 writel(data, mp->shared->base + offset);
444 }
445
446 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
447 {
448 writel(data, mp->base + offset);
449 }
450
451
452 /* rxq/txq helper functions *************************************************/
453 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
454 {
455 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
456 }
457
458 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
459 {
460 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
461 }
462
463 static void rxq_enable(struct rx_queue *rxq)
464 {
465 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
466 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
467 }
468
469 static void rxq_disable(struct rx_queue *rxq)
470 {
471 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
472 u8 mask = 1 << rxq->index;
473
474 wrlp(mp, RXQ_COMMAND, mask << 8);
475 while (rdlp(mp, RXQ_COMMAND) & mask)
476 udelay(10);
477 }
478
479 static void txq_reset_hw_ptr(struct tx_queue *txq)
480 {
481 struct mv643xx_eth_private *mp = txq_to_mp(txq);
482 u32 addr;
483
484 addr = (u32)txq->tx_desc_dma;
485 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
486 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
487 }
488
489 static void txq_enable(struct tx_queue *txq)
490 {
491 struct mv643xx_eth_private *mp = txq_to_mp(txq);
492 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
493 }
494
495 static void txq_disable(struct tx_queue *txq)
496 {
497 struct mv643xx_eth_private *mp = txq_to_mp(txq);
498 u8 mask = 1 << txq->index;
499
500 wrlp(mp, TXQ_COMMAND, mask << 8);
501 while (rdlp(mp, TXQ_COMMAND) & mask)
502 udelay(10);
503 }
504
505 static void txq_maybe_wake(struct tx_queue *txq)
506 {
507 struct mv643xx_eth_private *mp = txq_to_mp(txq);
508 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
509
510 if (netif_tx_queue_stopped(nq)) {
511 __netif_tx_lock(nq, smp_processor_id());
512 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1)
513 netif_tx_wake_queue(nq);
514 __netif_tx_unlock(nq);
515 }
516 }
517
518
519 /* rx napi ******************************************************************/
520 static int
521 mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph,
522 u64 *hdr_flags, void *priv)
523 {
524 unsigned long cmd_sts = (unsigned long)priv;
525
526 /*
527 * Make sure that this packet is Ethernet II, is not VLAN
528 * tagged, is IPv4, has a valid IP header, and is TCP.
529 */
530 if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
531 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK |
532 RX_PKT_IS_VLAN_TAGGED)) !=
533 (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
534 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4))
535 return -1;
536
537 skb_reset_network_header(skb);
538 skb_set_transport_header(skb, ip_hdrlen(skb));
539 *iphdr = ip_hdr(skb);
540 *tcph = tcp_hdr(skb);
541 *hdr_flags = LRO_IPV4 | LRO_TCP;
542
543 return 0;
544 }
545
546 static int rxq_process(struct rx_queue *rxq, int budget)
547 {
548 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
549 struct net_device_stats *stats = &mp->dev->stats;
550 int lro_flush_needed;
551 int rx;
552
553 lro_flush_needed = 0;
554 rx = 0;
555 while (rx < budget && rxq->rx_desc_count) {
556 struct rx_desc *rx_desc;
557 unsigned int cmd_sts;
558 struct sk_buff *skb;
559 u16 byte_cnt;
560
561 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
562
563 cmd_sts = rx_desc->cmd_sts;
564 if (cmd_sts & BUFFER_OWNED_BY_DMA)
565 break;
566 rmb();
567
568 skb = rxq->rx_skb[rxq->rx_curr_desc];
569 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
570
571 rxq->rx_curr_desc++;
572 if (rxq->rx_curr_desc == rxq->rx_ring_size)
573 rxq->rx_curr_desc = 0;
574
575 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
576 rx_desc->buf_size, DMA_FROM_DEVICE);
577 rxq->rx_desc_count--;
578 rx++;
579
580 mp->work_rx_refill |= 1 << rxq->index;
581
582 byte_cnt = rx_desc->byte_cnt;
583
584 /*
585 * Update statistics.
586 *
587 * Note that the descriptor byte count includes 2 dummy
588 * bytes automatically inserted by the hardware at the
589 * start of the packet (which we don't count), and a 4
590 * byte CRC at the end of the packet (which we do count).
591 */
592 stats->rx_packets++;
593 stats->rx_bytes += byte_cnt - 2;
594
595 /*
596 * In case we received a packet without first / last bits
597 * on, or the error summary bit is set, the packet needs
598 * to be dropped.
599 */
600 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
601 != (RX_FIRST_DESC | RX_LAST_DESC))
602 goto err;
603
604 /*
605 * The -4 is for the CRC in the trailer of the
606 * received packet
607 */
608 skb_put(skb, byte_cnt - 2 - 4);
609
610 if (cmd_sts & LAYER_4_CHECKSUM_OK)
611 skb->ip_summed = CHECKSUM_UNNECESSARY;
612 skb->protocol = eth_type_trans(skb, mp->dev);
613
614 if (skb->dev->features & NETIF_F_LRO &&
615 skb->ip_summed == CHECKSUM_UNNECESSARY) {
616 lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts);
617 lro_flush_needed = 1;
618 } else
619 netif_receive_skb(skb);
620
621 continue;
622
623 err:
624 stats->rx_dropped++;
625
626 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
627 (RX_FIRST_DESC | RX_LAST_DESC)) {
628 if (net_ratelimit())
629 dev_printk(KERN_ERR, &mp->dev->dev,
630 "received packet spanning "
631 "multiple descriptors\n");
632 }
633
634 if (cmd_sts & ERROR_SUMMARY)
635 stats->rx_errors++;
636
637 dev_kfree_skb(skb);
638 }
639
640 if (lro_flush_needed)
641 lro_flush_all(&rxq->lro_mgr);
642
643 if (rx < budget)
644 mp->work_rx &= ~(1 << rxq->index);
645
646 return rx;
647 }
648
649 static int rxq_refill(struct rx_queue *rxq, int budget)
650 {
651 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
652 int refilled;
653
654 refilled = 0;
655 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
656 struct sk_buff *skb;
657 int rx;
658 struct rx_desc *rx_desc;
659
660 skb = __skb_dequeue(&mp->rx_recycle);
661 if (skb == NULL)
662 skb = dev_alloc_skb(mp->skb_size);
663
664 if (skb == NULL) {
665 mp->oom = 1;
666 goto oom;
667 }
668
669 if (SKB_DMA_REALIGN)
670 skb_reserve(skb, SKB_DMA_REALIGN);
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(mp->dev->dev.parent,
682 skb->data, mp->skb_size,
683 DMA_FROM_DEVICE);
684 rx_desc->buf_size = mp->skb_size;
685 rxq->rx_skb[rx] = skb;
686 wmb();
687 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
688 wmb();
689
690 /*
691 * The hardware automatically prepends 2 bytes of
692 * dummy data to each received packet, so that the
693 * IP header ends up 16-byte aligned.
694 */
695 skb_reserve(skb, 2);
696 }
697
698 if (refilled < budget)
699 mp->work_rx_refill &= ~(1 << rxq->index);
700
701 oom:
702 return refilled;
703 }
704
705
706 /* tx ***********************************************************************/
707 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
708 {
709 int frag;
710
711 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
712 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
713 if (fragp->size <= 8 && fragp->page_offset & 7)
714 return 1;
715 }
716
717 return 0;
718 }
719
720 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
721 {
722 struct mv643xx_eth_private *mp = txq_to_mp(txq);
723 int nr_frags = skb_shinfo(skb)->nr_frags;
724 int frag;
725
726 for (frag = 0; frag < nr_frags; frag++) {
727 skb_frag_t *this_frag;
728 int tx_index;
729 struct tx_desc *desc;
730
731 this_frag = &skb_shinfo(skb)->frags[frag];
732 tx_index = txq->tx_curr_desc++;
733 if (txq->tx_curr_desc == txq->tx_ring_size)
734 txq->tx_curr_desc = 0;
735 desc = &txq->tx_desc_area[tx_index];
736
737 /*
738 * The last fragment will generate an interrupt
739 * which will free the skb on TX completion.
740 */
741 if (frag == nr_frags - 1) {
742 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
743 ZERO_PADDING | TX_LAST_DESC |
744 TX_ENABLE_INTERRUPT;
745 } else {
746 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
747 }
748
749 desc->l4i_chk = 0;
750 desc->byte_cnt = this_frag->size;
751 desc->buf_ptr = dma_map_page(mp->dev->dev.parent,
752 this_frag->page,
753 this_frag->page_offset,
754 this_frag->size, DMA_TO_DEVICE);
755 }
756 }
757
758 static inline __be16 sum16_as_be(__sum16 sum)
759 {
760 return (__force __be16)sum;
761 }
762
763 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
764 {
765 struct mv643xx_eth_private *mp = txq_to_mp(txq);
766 int nr_frags = skb_shinfo(skb)->nr_frags;
767 int tx_index;
768 struct tx_desc *desc;
769 u32 cmd_sts;
770 u16 l4i_chk;
771 int length;
772
773 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
774 l4i_chk = 0;
775
776 if (skb->ip_summed == CHECKSUM_PARTIAL) {
777 int tag_bytes;
778
779 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
780 skb->protocol != htons(ETH_P_8021Q));
781
782 tag_bytes = (void *)ip_hdr(skb) - (void *)skb->data - ETH_HLEN;
783 if (unlikely(tag_bytes & ~12)) {
784 if (skb_checksum_help(skb) == 0)
785 goto no_csum;
786 kfree_skb(skb);
787 return 1;
788 }
789
790 if (tag_bytes & 4)
791 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
792 if (tag_bytes & 8)
793 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
794
795 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
796 GEN_IP_V4_CHECKSUM |
797 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
798
799 switch (ip_hdr(skb)->protocol) {
800 case IPPROTO_UDP:
801 cmd_sts |= UDP_FRAME;
802 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
803 break;
804 case IPPROTO_TCP:
805 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
806 break;
807 default:
808 BUG();
809 }
810 } else {
811 no_csum:
812 /* Errata BTS #50, IHL must be 5 if no HW checksum */
813 cmd_sts |= 5 << TX_IHL_SHIFT;
814 }
815
816 tx_index = txq->tx_curr_desc++;
817 if (txq->tx_curr_desc == txq->tx_ring_size)
818 txq->tx_curr_desc = 0;
819 desc = &txq->tx_desc_area[tx_index];
820
821 if (nr_frags) {
822 txq_submit_frag_skb(txq, skb);
823 length = skb_headlen(skb);
824 } else {
825 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
826 length = skb->len;
827 }
828
829 desc->l4i_chk = l4i_chk;
830 desc->byte_cnt = length;
831 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
832 length, DMA_TO_DEVICE);
833
834 __skb_queue_tail(&txq->tx_skb, skb);
835
836 /* ensure all other descriptors are written before first cmd_sts */
837 wmb();
838 desc->cmd_sts = cmd_sts;
839
840 /* clear TX_END status */
841 mp->work_tx_end &= ~(1 << txq->index);
842
843 /* ensure all descriptors are written before poking hardware */
844 wmb();
845 txq_enable(txq);
846
847 txq->tx_desc_count += nr_frags + 1;
848
849 return 0;
850 }
851
852 static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
853 {
854 struct mv643xx_eth_private *mp = netdev_priv(dev);
855 int queue;
856 struct tx_queue *txq;
857 struct netdev_queue *nq;
858
859 queue = skb_get_queue_mapping(skb);
860 txq = mp->txq + queue;
861 nq = netdev_get_tx_queue(dev, queue);
862
863 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
864 txq->tx_dropped++;
865 dev_printk(KERN_DEBUG, &dev->dev,
866 "failed to linearize skb with tiny "
867 "unaligned fragment\n");
868 return NETDEV_TX_BUSY;
869 }
870
871 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
872 if (net_ratelimit())
873 dev_printk(KERN_ERR, &dev->dev, "tx queue full?!\n");
874 kfree_skb(skb);
875 return NETDEV_TX_OK;
876 }
877
878 if (!txq_submit_skb(txq, skb)) {
879 int entries_left;
880
881 txq->tx_bytes += skb->len;
882 txq->tx_packets++;
883 dev->trans_start = jiffies;
884
885 entries_left = txq->tx_ring_size - txq->tx_desc_count;
886 if (entries_left < MAX_SKB_FRAGS + 1)
887 netif_tx_stop_queue(nq);
888 }
889
890 return NETDEV_TX_OK;
891 }
892
893
894 /* tx napi ******************************************************************/
895 static void txq_kick(struct tx_queue *txq)
896 {
897 struct mv643xx_eth_private *mp = txq_to_mp(txq);
898 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
899 u32 hw_desc_ptr;
900 u32 expected_ptr;
901
902 __netif_tx_lock(nq, smp_processor_id());
903
904 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
905 goto out;
906
907 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
908 expected_ptr = (u32)txq->tx_desc_dma +
909 txq->tx_curr_desc * sizeof(struct tx_desc);
910
911 if (hw_desc_ptr != expected_ptr)
912 txq_enable(txq);
913
914 out:
915 __netif_tx_unlock(nq);
916
917 mp->work_tx_end &= ~(1 << txq->index);
918 }
919
920 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
921 {
922 struct mv643xx_eth_private *mp = txq_to_mp(txq);
923 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
924 int reclaimed;
925
926 __netif_tx_lock(nq, smp_processor_id());
927
928 reclaimed = 0;
929 while (reclaimed < budget && txq->tx_desc_count > 0) {
930 int tx_index;
931 struct tx_desc *desc;
932 u32 cmd_sts;
933 struct sk_buff *skb;
934
935 tx_index = txq->tx_used_desc;
936 desc = &txq->tx_desc_area[tx_index];
937 cmd_sts = desc->cmd_sts;
938
939 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
940 if (!force)
941 break;
942 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
943 }
944
945 txq->tx_used_desc = tx_index + 1;
946 if (txq->tx_used_desc == txq->tx_ring_size)
947 txq->tx_used_desc = 0;
948
949 reclaimed++;
950 txq->tx_desc_count--;
951
952 skb = NULL;
953 if (cmd_sts & TX_LAST_DESC)
954 skb = __skb_dequeue(&txq->tx_skb);
955
956 if (cmd_sts & ERROR_SUMMARY) {
957 dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n");
958 mp->dev->stats.tx_errors++;
959 }
960
961 if (cmd_sts & TX_FIRST_DESC) {
962 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
963 desc->byte_cnt, DMA_TO_DEVICE);
964 } else {
965 dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr,
966 desc->byte_cnt, DMA_TO_DEVICE);
967 }
968
969 if (skb != NULL) {
970 if (skb_queue_len(&mp->rx_recycle) <
971 mp->rx_ring_size &&
972 skb_recycle_check(skb, mp->skb_size))
973 __skb_queue_head(&mp->rx_recycle, skb);
974 else
975 dev_kfree_skb(skb);
976 }
977 }
978
979 __netif_tx_unlock(nq);
980
981 if (reclaimed < budget)
982 mp->work_tx &= ~(1 << txq->index);
983
984 return reclaimed;
985 }
986
987
988 /* tx rate control **********************************************************/
989 /*
990 * Set total maximum TX rate (shared by all TX queues for this port)
991 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
992 */
993 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
994 {
995 int token_rate;
996 int mtu;
997 int bucket_size;
998
999 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1000 if (token_rate > 1023)
1001 token_rate = 1023;
1002
1003 mtu = (mp->dev->mtu + 255) >> 8;
1004 if (mtu > 63)
1005 mtu = 63;
1006
1007 bucket_size = (burst + 255) >> 8;
1008 if (bucket_size > 65535)
1009 bucket_size = 65535;
1010
1011 switch (mp->shared->tx_bw_control) {
1012 case TX_BW_CONTROL_OLD_LAYOUT:
1013 wrlp(mp, TX_BW_RATE, token_rate);
1014 wrlp(mp, TX_BW_MTU, mtu);
1015 wrlp(mp, TX_BW_BURST, bucket_size);
1016 break;
1017 case TX_BW_CONTROL_NEW_LAYOUT:
1018 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1019 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1020 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1021 break;
1022 }
1023 }
1024
1025 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1026 {
1027 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1028 int token_rate;
1029 int bucket_size;
1030
1031 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1032 if (token_rate > 1023)
1033 token_rate = 1023;
1034
1035 bucket_size = (burst + 255) >> 8;
1036 if (bucket_size > 65535)
1037 bucket_size = 65535;
1038
1039 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1040 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1041 }
1042
1043 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1044 {
1045 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1046 int off;
1047 u32 val;
1048
1049 /*
1050 * Turn on fixed priority mode.
1051 */
1052 off = 0;
1053 switch (mp->shared->tx_bw_control) {
1054 case TX_BW_CONTROL_OLD_LAYOUT:
1055 off = TXQ_FIX_PRIO_CONF;
1056 break;
1057 case TX_BW_CONTROL_NEW_LAYOUT:
1058 off = TXQ_FIX_PRIO_CONF_MOVED;
1059 break;
1060 }
1061
1062 if (off) {
1063 val = rdlp(mp, off);
1064 val |= 1 << txq->index;
1065 wrlp(mp, off, val);
1066 }
1067 }
1068
1069 static void txq_set_wrr(struct tx_queue *txq, int weight)
1070 {
1071 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1072 int off;
1073 u32 val;
1074
1075 /*
1076 * Turn off fixed priority mode.
1077 */
1078 off = 0;
1079 switch (mp->shared->tx_bw_control) {
1080 case TX_BW_CONTROL_OLD_LAYOUT:
1081 off = TXQ_FIX_PRIO_CONF;
1082 break;
1083 case TX_BW_CONTROL_NEW_LAYOUT:
1084 off = TXQ_FIX_PRIO_CONF_MOVED;
1085 break;
1086 }
1087
1088 if (off) {
1089 val = rdlp(mp, off);
1090 val &= ~(1 << txq->index);
1091 wrlp(mp, off, val);
1092
1093 /*
1094 * Configure WRR weight for this queue.
1095 */
1096
1097 val = rdlp(mp, off);
1098 val = (val & ~0xff) | (weight & 0xff);
1099 wrlp(mp, TXQ_BW_WRR_CONF(txq->index), val);
1100 }
1101 }
1102
1103
1104 /* mii management interface *************************************************/
1105 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1106 {
1107 struct mv643xx_eth_shared_private *msp = dev_id;
1108
1109 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1110 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1111 wake_up(&msp->smi_busy_wait);
1112 return IRQ_HANDLED;
1113 }
1114
1115 return IRQ_NONE;
1116 }
1117
1118 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1119 {
1120 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1121 }
1122
1123 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1124 {
1125 if (msp->err_interrupt == NO_IRQ) {
1126 int i;
1127
1128 for (i = 0; !smi_is_done(msp); i++) {
1129 if (i == 10)
1130 return -ETIMEDOUT;
1131 msleep(10);
1132 }
1133
1134 return 0;
1135 }
1136
1137 if (!smi_is_done(msp)) {
1138 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1139 msecs_to_jiffies(100));
1140 if (!smi_is_done(msp))
1141 return -ETIMEDOUT;
1142 }
1143
1144 return 0;
1145 }
1146
1147 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1148 {
1149 struct mv643xx_eth_shared_private *msp = bus->priv;
1150 void __iomem *smi_reg = msp->base + SMI_REG;
1151 int ret;
1152
1153 if (smi_wait_ready(msp)) {
1154 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1155 return -ETIMEDOUT;
1156 }
1157
1158 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
1159
1160 if (smi_wait_ready(msp)) {
1161 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1162 return -ETIMEDOUT;
1163 }
1164
1165 ret = readl(smi_reg);
1166 if (!(ret & SMI_READ_VALID)) {
1167 printk(KERN_WARNING "mv643xx_eth: SMI bus read not valid\n");
1168 return -ENODEV;
1169 }
1170
1171 return ret & 0xffff;
1172 }
1173
1174 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1175 {
1176 struct mv643xx_eth_shared_private *msp = bus->priv;
1177 void __iomem *smi_reg = msp->base + SMI_REG;
1178
1179 if (smi_wait_ready(msp)) {
1180 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1181 return -ETIMEDOUT;
1182 }
1183
1184 writel(SMI_OPCODE_WRITE | (reg << 21) |
1185 (addr << 16) | (val & 0xffff), smi_reg);
1186
1187 if (smi_wait_ready(msp)) {
1188 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1189 return -ETIMEDOUT;
1190 }
1191
1192 return 0;
1193 }
1194
1195
1196 /* statistics ***************************************************************/
1197 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1198 {
1199 struct mv643xx_eth_private *mp = netdev_priv(dev);
1200 struct net_device_stats *stats = &dev->stats;
1201 unsigned long tx_packets = 0;
1202 unsigned long tx_bytes = 0;
1203 unsigned long tx_dropped = 0;
1204 int i;
1205
1206 for (i = 0; i < mp->txq_count; i++) {
1207 struct tx_queue *txq = mp->txq + i;
1208
1209 tx_packets += txq->tx_packets;
1210 tx_bytes += txq->tx_bytes;
1211 tx_dropped += txq->tx_dropped;
1212 }
1213
1214 stats->tx_packets = tx_packets;
1215 stats->tx_bytes = tx_bytes;
1216 stats->tx_dropped = tx_dropped;
1217
1218 return stats;
1219 }
1220
1221 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1222 {
1223 u32 lro_aggregated = 0;
1224 u32 lro_flushed = 0;
1225 u32 lro_no_desc = 0;
1226 int i;
1227
1228 for (i = 0; i < mp->rxq_count; i++) {
1229 struct rx_queue *rxq = mp->rxq + i;
1230
1231 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1232 lro_flushed += rxq->lro_mgr.stats.flushed;
1233 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1234 }
1235
1236 mp->lro_counters.lro_aggregated = lro_aggregated;
1237 mp->lro_counters.lro_flushed = lro_flushed;
1238 mp->lro_counters.lro_no_desc = lro_no_desc;
1239 }
1240
1241 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1242 {
1243 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1244 }
1245
1246 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1247 {
1248 int i;
1249
1250 for (i = 0; i < 0x80; i += 4)
1251 mib_read(mp, i);
1252 }
1253
1254 static void mib_counters_update(struct mv643xx_eth_private *mp)
1255 {
1256 struct mib_counters *p = &mp->mib_counters;
1257
1258 spin_lock_bh(&mp->mib_counters_lock);
1259 p->good_octets_received += mib_read(mp, 0x00);
1260 p->bad_octets_received += mib_read(mp, 0x08);
1261 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1262 p->good_frames_received += mib_read(mp, 0x10);
1263 p->bad_frames_received += mib_read(mp, 0x14);
1264 p->broadcast_frames_received += mib_read(mp, 0x18);
1265 p->multicast_frames_received += mib_read(mp, 0x1c);
1266 p->frames_64_octets += mib_read(mp, 0x20);
1267 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1268 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1269 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1270 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1271 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1272 p->good_octets_sent += mib_read(mp, 0x38);
1273 p->good_frames_sent += mib_read(mp, 0x40);
1274 p->excessive_collision += mib_read(mp, 0x44);
1275 p->multicast_frames_sent += mib_read(mp, 0x48);
1276 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1277 p->unrec_mac_control_received += mib_read(mp, 0x50);
1278 p->fc_sent += mib_read(mp, 0x54);
1279 p->good_fc_received += mib_read(mp, 0x58);
1280 p->bad_fc_received += mib_read(mp, 0x5c);
1281 p->undersize_received += mib_read(mp, 0x60);
1282 p->fragments_received += mib_read(mp, 0x64);
1283 p->oversize_received += mib_read(mp, 0x68);
1284 p->jabber_received += mib_read(mp, 0x6c);
1285 p->mac_receive_error += mib_read(mp, 0x70);
1286 p->bad_crc_event += mib_read(mp, 0x74);
1287 p->collision += mib_read(mp, 0x78);
1288 p->late_collision += mib_read(mp, 0x7c);
1289 spin_unlock_bh(&mp->mib_counters_lock);
1290
1291 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1292 }
1293
1294 static void mib_counters_timer_wrapper(unsigned long _mp)
1295 {
1296 struct mv643xx_eth_private *mp = (void *)_mp;
1297
1298 mib_counters_update(mp);
1299 }
1300
1301
1302 /* interrupt coalescing *****************************************************/
1303 /*
1304 * Hardware coalescing parameters are set in units of 64 t_clk
1305 * cycles. I.e.:
1306 *
1307 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1308 *
1309 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1310 *
1311 * In the ->set*() methods, we round the computed register value
1312 * to the nearest integer.
1313 */
1314 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1315 {
1316 u32 val = rdlp(mp, SDMA_CONFIG);
1317 u64 temp;
1318
1319 if (mp->shared->extended_rx_coal_limit)
1320 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1321 else
1322 temp = (val & 0x003fff00) >> 8;
1323
1324 temp *= 64000000;
1325 do_div(temp, mp->shared->t_clk);
1326
1327 return (unsigned int)temp;
1328 }
1329
1330 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1331 {
1332 u64 temp;
1333 u32 val;
1334
1335 temp = (u64)usec * mp->shared->t_clk;
1336 temp += 31999999;
1337 do_div(temp, 64000000);
1338
1339 val = rdlp(mp, SDMA_CONFIG);
1340 if (mp->shared->extended_rx_coal_limit) {
1341 if (temp > 0xffff)
1342 temp = 0xffff;
1343 val &= ~0x023fff80;
1344 val |= (temp & 0x8000) << 10;
1345 val |= (temp & 0x7fff) << 7;
1346 } else {
1347 if (temp > 0x3fff)
1348 temp = 0x3fff;
1349 val &= ~0x003fff00;
1350 val |= (temp & 0x3fff) << 8;
1351 }
1352 wrlp(mp, SDMA_CONFIG, val);
1353 }
1354
1355 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1356 {
1357 u64 temp;
1358
1359 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1360 temp *= 64000000;
1361 do_div(temp, mp->shared->t_clk);
1362
1363 return (unsigned int)temp;
1364 }
1365
1366 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1367 {
1368 u64 temp;
1369
1370 temp = (u64)usec * mp->shared->t_clk;
1371 temp += 31999999;
1372 do_div(temp, 64000000);
1373
1374 if (temp > 0x3fff)
1375 temp = 0x3fff;
1376
1377 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1378 }
1379
1380
1381 /* ethtool ******************************************************************/
1382 struct mv643xx_eth_stats {
1383 char stat_string[ETH_GSTRING_LEN];
1384 int sizeof_stat;
1385 int netdev_off;
1386 int mp_off;
1387 };
1388
1389 #define SSTAT(m) \
1390 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1391 offsetof(struct net_device, stats.m), -1 }
1392
1393 #define MIBSTAT(m) \
1394 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1395 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1396
1397 #define LROSTAT(m) \
1398 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1399 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1400
1401 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1402 SSTAT(rx_packets),
1403 SSTAT(tx_packets),
1404 SSTAT(rx_bytes),
1405 SSTAT(tx_bytes),
1406 SSTAT(rx_errors),
1407 SSTAT(tx_errors),
1408 SSTAT(rx_dropped),
1409 SSTAT(tx_dropped),
1410 MIBSTAT(good_octets_received),
1411 MIBSTAT(bad_octets_received),
1412 MIBSTAT(internal_mac_transmit_err),
1413 MIBSTAT(good_frames_received),
1414 MIBSTAT(bad_frames_received),
1415 MIBSTAT(broadcast_frames_received),
1416 MIBSTAT(multicast_frames_received),
1417 MIBSTAT(frames_64_octets),
1418 MIBSTAT(frames_65_to_127_octets),
1419 MIBSTAT(frames_128_to_255_octets),
1420 MIBSTAT(frames_256_to_511_octets),
1421 MIBSTAT(frames_512_to_1023_octets),
1422 MIBSTAT(frames_1024_to_max_octets),
1423 MIBSTAT(good_octets_sent),
1424 MIBSTAT(good_frames_sent),
1425 MIBSTAT(excessive_collision),
1426 MIBSTAT(multicast_frames_sent),
1427 MIBSTAT(broadcast_frames_sent),
1428 MIBSTAT(unrec_mac_control_received),
1429 MIBSTAT(fc_sent),
1430 MIBSTAT(good_fc_received),
1431 MIBSTAT(bad_fc_received),
1432 MIBSTAT(undersize_received),
1433 MIBSTAT(fragments_received),
1434 MIBSTAT(oversize_received),
1435 MIBSTAT(jabber_received),
1436 MIBSTAT(mac_receive_error),
1437 MIBSTAT(bad_crc_event),
1438 MIBSTAT(collision),
1439 MIBSTAT(late_collision),
1440 LROSTAT(lro_aggregated),
1441 LROSTAT(lro_flushed),
1442 LROSTAT(lro_no_desc),
1443 };
1444
1445 static int
1446 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1447 struct ethtool_cmd *cmd)
1448 {
1449 int err;
1450
1451 err = phy_read_status(mp->phy);
1452 if (err == 0)
1453 err = phy_ethtool_gset(mp->phy, cmd);
1454
1455 /*
1456 * The MAC does not support 1000baseT_Half.
1457 */
1458 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1459 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1460
1461 return err;
1462 }
1463
1464 static int
1465 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1466 struct ethtool_cmd *cmd)
1467 {
1468 u32 port_status;
1469
1470 port_status = rdlp(mp, PORT_STATUS);
1471
1472 cmd->supported = SUPPORTED_MII;
1473 cmd->advertising = ADVERTISED_MII;
1474 switch (port_status & PORT_SPEED_MASK) {
1475 case PORT_SPEED_10:
1476 cmd->speed = SPEED_10;
1477 break;
1478 case PORT_SPEED_100:
1479 cmd->speed = SPEED_100;
1480 break;
1481 case PORT_SPEED_1000:
1482 cmd->speed = SPEED_1000;
1483 break;
1484 default:
1485 cmd->speed = -1;
1486 break;
1487 }
1488 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1489 cmd->port = PORT_MII;
1490 cmd->phy_address = 0;
1491 cmd->transceiver = XCVR_INTERNAL;
1492 cmd->autoneg = AUTONEG_DISABLE;
1493 cmd->maxtxpkt = 1;
1494 cmd->maxrxpkt = 1;
1495
1496 return 0;
1497 }
1498
1499 static int
1500 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1501 {
1502 struct mv643xx_eth_private *mp = netdev_priv(dev);
1503
1504 if (mp->phy != NULL)
1505 return mv643xx_eth_get_settings_phy(mp, cmd);
1506 else
1507 return mv643xx_eth_get_settings_phyless(mp, cmd);
1508 }
1509
1510 static int
1511 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1512 {
1513 struct mv643xx_eth_private *mp = netdev_priv(dev);
1514
1515 if (mp->phy == NULL)
1516 return -EINVAL;
1517
1518 /*
1519 * The MAC does not support 1000baseT_Half.
1520 */
1521 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1522
1523 return phy_ethtool_sset(mp->phy, cmd);
1524 }
1525
1526 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1527 struct ethtool_drvinfo *drvinfo)
1528 {
1529 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1530 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1531 strncpy(drvinfo->fw_version, "N/A", 32);
1532 strncpy(drvinfo->bus_info, "platform", 32);
1533 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1534 }
1535
1536 static int mv643xx_eth_nway_reset(struct net_device *dev)
1537 {
1538 struct mv643xx_eth_private *mp = netdev_priv(dev);
1539
1540 if (mp->phy == NULL)
1541 return -EINVAL;
1542
1543 return genphy_restart_aneg(mp->phy);
1544 }
1545
1546 static u32 mv643xx_eth_get_link(struct net_device *dev)
1547 {
1548 return !!netif_carrier_ok(dev);
1549 }
1550
1551 static int
1552 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1553 {
1554 struct mv643xx_eth_private *mp = netdev_priv(dev);
1555
1556 ec->rx_coalesce_usecs = get_rx_coal(mp);
1557 ec->tx_coalesce_usecs = get_tx_coal(mp);
1558
1559 return 0;
1560 }
1561
1562 static int
1563 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1564 {
1565 struct mv643xx_eth_private *mp = netdev_priv(dev);
1566
1567 set_rx_coal(mp, ec->rx_coalesce_usecs);
1568 set_tx_coal(mp, ec->tx_coalesce_usecs);
1569
1570 return 0;
1571 }
1572
1573 static void
1574 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1575 {
1576 struct mv643xx_eth_private *mp = netdev_priv(dev);
1577
1578 er->rx_max_pending = 4096;
1579 er->tx_max_pending = 4096;
1580 er->rx_mini_max_pending = 0;
1581 er->rx_jumbo_max_pending = 0;
1582
1583 er->rx_pending = mp->rx_ring_size;
1584 er->tx_pending = mp->tx_ring_size;
1585 er->rx_mini_pending = 0;
1586 er->rx_jumbo_pending = 0;
1587 }
1588
1589 static int
1590 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1591 {
1592 struct mv643xx_eth_private *mp = netdev_priv(dev);
1593
1594 if (er->rx_mini_pending || er->rx_jumbo_pending)
1595 return -EINVAL;
1596
1597 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1598 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1599
1600 if (netif_running(dev)) {
1601 mv643xx_eth_stop(dev);
1602 if (mv643xx_eth_open(dev)) {
1603 dev_printk(KERN_ERR, &dev->dev,
1604 "fatal error on re-opening device after "
1605 "ring param change\n");
1606 return -ENOMEM;
1607 }
1608 }
1609
1610 return 0;
1611 }
1612
1613 static u32
1614 mv643xx_eth_get_rx_csum(struct net_device *dev)
1615 {
1616 struct mv643xx_eth_private *mp = netdev_priv(dev);
1617
1618 return !!(rdlp(mp, PORT_CONFIG) & 0x02000000);
1619 }
1620
1621 static int
1622 mv643xx_eth_set_rx_csum(struct net_device *dev, u32 rx_csum)
1623 {
1624 struct mv643xx_eth_private *mp = netdev_priv(dev);
1625
1626 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1627
1628 return 0;
1629 }
1630
1631 static void mv643xx_eth_get_strings(struct net_device *dev,
1632 uint32_t stringset, uint8_t *data)
1633 {
1634 int i;
1635
1636 if (stringset == ETH_SS_STATS) {
1637 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1638 memcpy(data + i * ETH_GSTRING_LEN,
1639 mv643xx_eth_stats[i].stat_string,
1640 ETH_GSTRING_LEN);
1641 }
1642 }
1643 }
1644
1645 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1646 struct ethtool_stats *stats,
1647 uint64_t *data)
1648 {
1649 struct mv643xx_eth_private *mp = netdev_priv(dev);
1650 int i;
1651
1652 mv643xx_eth_get_stats(dev);
1653 mib_counters_update(mp);
1654 mv643xx_eth_grab_lro_stats(mp);
1655
1656 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1657 const struct mv643xx_eth_stats *stat;
1658 void *p;
1659
1660 stat = mv643xx_eth_stats + i;
1661
1662 if (stat->netdev_off >= 0)
1663 p = ((void *)mp->dev) + stat->netdev_off;
1664 else
1665 p = ((void *)mp) + stat->mp_off;
1666
1667 data[i] = (stat->sizeof_stat == 8) ?
1668 *(uint64_t *)p : *(uint32_t *)p;
1669 }
1670 }
1671
1672 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1673 {
1674 if (sset == ETH_SS_STATS)
1675 return ARRAY_SIZE(mv643xx_eth_stats);
1676
1677 return -EOPNOTSUPP;
1678 }
1679
1680 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1681 .get_settings = mv643xx_eth_get_settings,
1682 .set_settings = mv643xx_eth_set_settings,
1683 .get_drvinfo = mv643xx_eth_get_drvinfo,
1684 .nway_reset = mv643xx_eth_nway_reset,
1685 .get_link = mv643xx_eth_get_link,
1686 .get_coalesce = mv643xx_eth_get_coalesce,
1687 .set_coalesce = mv643xx_eth_set_coalesce,
1688 .get_ringparam = mv643xx_eth_get_ringparam,
1689 .set_ringparam = mv643xx_eth_set_ringparam,
1690 .get_rx_csum = mv643xx_eth_get_rx_csum,
1691 .set_rx_csum = mv643xx_eth_set_rx_csum,
1692 .set_tx_csum = ethtool_op_set_tx_csum,
1693 .set_sg = ethtool_op_set_sg,
1694 .get_strings = mv643xx_eth_get_strings,
1695 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1696 .get_flags = ethtool_op_get_flags,
1697 .set_flags = ethtool_op_set_flags,
1698 .get_sset_count = mv643xx_eth_get_sset_count,
1699 };
1700
1701
1702 /* address handling *********************************************************/
1703 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1704 {
1705 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1706 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1707
1708 addr[0] = (mac_h >> 24) & 0xff;
1709 addr[1] = (mac_h >> 16) & 0xff;
1710 addr[2] = (mac_h >> 8) & 0xff;
1711 addr[3] = mac_h & 0xff;
1712 addr[4] = (mac_l >> 8) & 0xff;
1713 addr[5] = mac_l & 0xff;
1714 }
1715
1716 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1717 {
1718 wrlp(mp, MAC_ADDR_HIGH,
1719 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1720 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1721 }
1722
1723 static u32 uc_addr_filter_mask(struct net_device *dev)
1724 {
1725 struct netdev_hw_addr *ha;
1726 u32 nibbles;
1727
1728 if (dev->flags & IFF_PROMISC)
1729 return 0;
1730
1731 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1732 list_for_each_entry(ha, &dev->uc.list, list) {
1733 if (memcmp(dev->dev_addr, ha->addr, 5))
1734 return 0;
1735 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1736 return 0;
1737
1738 nibbles |= 1 << (ha->addr[5] & 0x0f);
1739 }
1740
1741 return nibbles;
1742 }
1743
1744 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1745 {
1746 struct mv643xx_eth_private *mp = netdev_priv(dev);
1747 u32 port_config;
1748 u32 nibbles;
1749 int i;
1750
1751 uc_addr_set(mp, dev->dev_addr);
1752
1753 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1754
1755 nibbles = uc_addr_filter_mask(dev);
1756 if (!nibbles) {
1757 port_config |= UNICAST_PROMISCUOUS_MODE;
1758 nibbles = 0xffff;
1759 }
1760
1761 for (i = 0; i < 16; i += 4) {
1762 int off = UNICAST_TABLE(mp->port_num) + i;
1763 u32 v;
1764
1765 v = 0;
1766 if (nibbles & 1)
1767 v |= 0x00000001;
1768 if (nibbles & 2)
1769 v |= 0x00000100;
1770 if (nibbles & 4)
1771 v |= 0x00010000;
1772 if (nibbles & 8)
1773 v |= 0x01000000;
1774 nibbles >>= 4;
1775
1776 wrl(mp, off, v);
1777 }
1778
1779 wrlp(mp, PORT_CONFIG, port_config);
1780 }
1781
1782 static int addr_crc(unsigned char *addr)
1783 {
1784 int crc = 0;
1785 int i;
1786
1787 for (i = 0; i < 6; i++) {
1788 int j;
1789
1790 crc = (crc ^ addr[i]) << 8;
1791 for (j = 7; j >= 0; j--) {
1792 if (crc & (0x100 << j))
1793 crc ^= 0x107 << j;
1794 }
1795 }
1796
1797 return crc;
1798 }
1799
1800 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1801 {
1802 struct mv643xx_eth_private *mp = netdev_priv(dev);
1803 u32 *mc_spec;
1804 u32 *mc_other;
1805 struct dev_addr_list *addr;
1806 int i;
1807
1808 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1809 int port_num;
1810 u32 accept;
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(mp->dev->dev.parent,
1898 size, &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(mp->dev->dev.parent, 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(mp->dev->dev.parent, 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(mp->dev->dev.parent,
2011 size, &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(mp->dev->dev.parent, 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) & mp->int_mask;
2068 if (int_cause == 0)
2069 return 0;
2070
2071 int_cause_ext = 0;
2072 if (int_cause & INT_EXT) {
2073 int_cause &= ~INT_EXT;
2074 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2075 }
2076
2077 if (int_cause) {
2078 wrlp(mp, INT_CAUSE, ~int_cause);
2079 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2080 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2081 mp->work_rx |= (int_cause & INT_RX) >> 2;
2082 }
2083
2084 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2085 if (int_cause_ext) {
2086 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2087 if (int_cause_ext & INT_EXT_LINK_PHY)
2088 mp->work_link = 1;
2089 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2090 }
2091
2092 return 1;
2093 }
2094
2095 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2096 {
2097 struct net_device *dev = (struct net_device *)dev_id;
2098 struct mv643xx_eth_private *mp = netdev_priv(dev);
2099
2100 if (unlikely(!mv643xx_eth_collect_events(mp)))
2101 return IRQ_NONE;
2102
2103 wrlp(mp, INT_MASK, 0);
2104 napi_schedule(&mp->napi);
2105
2106 return IRQ_HANDLED;
2107 }
2108
2109 static void handle_link_event(struct mv643xx_eth_private *mp)
2110 {
2111 struct net_device *dev = mp->dev;
2112 u32 port_status;
2113 int speed;
2114 int duplex;
2115 int fc;
2116
2117 port_status = rdlp(mp, PORT_STATUS);
2118 if (!(port_status & LINK_UP)) {
2119 if (netif_carrier_ok(dev)) {
2120 int i;
2121
2122 printk(KERN_INFO "%s: link down\n", dev->name);
2123
2124 netif_carrier_off(dev);
2125
2126 for (i = 0; i < mp->txq_count; i++) {
2127 struct tx_queue *txq = mp->txq + i;
2128
2129 txq_reclaim(txq, txq->tx_ring_size, 1);
2130 txq_reset_hw_ptr(txq);
2131 }
2132 }
2133 return;
2134 }
2135
2136 switch (port_status & PORT_SPEED_MASK) {
2137 case PORT_SPEED_10:
2138 speed = 10;
2139 break;
2140 case PORT_SPEED_100:
2141 speed = 100;
2142 break;
2143 case PORT_SPEED_1000:
2144 speed = 1000;
2145 break;
2146 default:
2147 speed = -1;
2148 break;
2149 }
2150 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2151 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2152
2153 printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
2154 "flow control %sabled\n", dev->name,
2155 speed, duplex ? "full" : "half",
2156 fc ? "en" : "dis");
2157
2158 if (!netif_carrier_ok(dev))
2159 netif_carrier_on(dev);
2160 }
2161
2162 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2163 {
2164 struct mv643xx_eth_private *mp;
2165 int work_done;
2166
2167 mp = container_of(napi, struct mv643xx_eth_private, napi);
2168
2169 if (unlikely(mp->oom)) {
2170 mp->oom = 0;
2171 del_timer(&mp->rx_oom);
2172 }
2173
2174 work_done = 0;
2175 while (work_done < budget) {
2176 u8 queue_mask;
2177 int queue;
2178 int work_tbd;
2179
2180 if (mp->work_link) {
2181 mp->work_link = 0;
2182 handle_link_event(mp);
2183 work_done++;
2184 continue;
2185 }
2186
2187 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2188 if (likely(!mp->oom))
2189 queue_mask |= mp->work_rx_refill;
2190
2191 if (!queue_mask) {
2192 if (mv643xx_eth_collect_events(mp))
2193 continue;
2194 break;
2195 }
2196
2197 queue = fls(queue_mask) - 1;
2198 queue_mask = 1 << queue;
2199
2200 work_tbd = budget - work_done;
2201 if (work_tbd > 16)
2202 work_tbd = 16;
2203
2204 if (mp->work_tx_end & queue_mask) {
2205 txq_kick(mp->txq + queue);
2206 } else if (mp->work_tx & queue_mask) {
2207 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2208 txq_maybe_wake(mp->txq + queue);
2209 } else if (mp->work_rx & queue_mask) {
2210 work_done += rxq_process(mp->rxq + queue, work_tbd);
2211 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2212 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2213 } else {
2214 BUG();
2215 }
2216 }
2217
2218 if (work_done < budget) {
2219 if (mp->oom)
2220 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2221 napi_complete(napi);
2222 wrlp(mp, INT_MASK, mp->int_mask);
2223 }
2224
2225 return work_done;
2226 }
2227
2228 static inline void oom_timer_wrapper(unsigned long data)
2229 {
2230 struct mv643xx_eth_private *mp = (void *)data;
2231
2232 napi_schedule(&mp->napi);
2233 }
2234
2235 static void phy_reset(struct mv643xx_eth_private *mp)
2236 {
2237 int data;
2238
2239 data = phy_read(mp->phy, MII_BMCR);
2240 if (data < 0)
2241 return;
2242
2243 data |= BMCR_RESET;
2244 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2245 return;
2246
2247 do {
2248 data = phy_read(mp->phy, MII_BMCR);
2249 } while (data >= 0 && data & BMCR_RESET);
2250 }
2251
2252 static void port_start(struct mv643xx_eth_private *mp)
2253 {
2254 u32 pscr;
2255 int i;
2256
2257 /*
2258 * Perform PHY reset, if there is a PHY.
2259 */
2260 if (mp->phy != NULL) {
2261 struct ethtool_cmd cmd;
2262
2263 mv643xx_eth_get_settings(mp->dev, &cmd);
2264 phy_reset(mp);
2265 mv643xx_eth_set_settings(mp->dev, &cmd);
2266 }
2267
2268 /*
2269 * Configure basic link parameters.
2270 */
2271 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2272
2273 pscr |= SERIAL_PORT_ENABLE;
2274 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2275
2276 pscr |= DO_NOT_FORCE_LINK_FAIL;
2277 if (mp->phy == NULL)
2278 pscr |= FORCE_LINK_PASS;
2279 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2280
2281 /*
2282 * Configure TX path and queues.
2283 */
2284 tx_set_rate(mp, 1000000000, 16777216);
2285 for (i = 0; i < mp->txq_count; i++) {
2286 struct tx_queue *txq = mp->txq + i;
2287
2288 txq_reset_hw_ptr(txq);
2289 txq_set_rate(txq, 1000000000, 16777216);
2290 txq_set_fixed_prio_mode(txq);
2291 }
2292
2293 /*
2294 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2295 * frames to RX queue #0, and include the pseudo-header when
2296 * calculating receive checksums.
2297 */
2298 wrlp(mp, PORT_CONFIG, 0x02000000);
2299
2300 /*
2301 * Treat BPDUs as normal multicasts, and disable partition mode.
2302 */
2303 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2304
2305 /*
2306 * Add configured unicast addresses to address filter table.
2307 */
2308 mv643xx_eth_program_unicast_filter(mp->dev);
2309
2310 /*
2311 * Enable the receive queues.
2312 */
2313 for (i = 0; i < mp->rxq_count; i++) {
2314 struct rx_queue *rxq = mp->rxq + i;
2315 u32 addr;
2316
2317 addr = (u32)rxq->rx_desc_dma;
2318 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2319 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2320
2321 rxq_enable(rxq);
2322 }
2323 }
2324
2325 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2326 {
2327 int skb_size;
2328
2329 /*
2330 * Reserve 2+14 bytes for an ethernet header (the hardware
2331 * automatically prepends 2 bytes of dummy data to each
2332 * received packet), 16 bytes for up to four VLAN tags, and
2333 * 4 bytes for the trailing FCS -- 36 bytes total.
2334 */
2335 skb_size = mp->dev->mtu + 36;
2336
2337 /*
2338 * Make sure that the skb size is a multiple of 8 bytes, as
2339 * the lower three bits of the receive descriptor's buffer
2340 * size field are ignored by the hardware.
2341 */
2342 mp->skb_size = (skb_size + 7) & ~7;
2343
2344 /*
2345 * If NET_SKB_PAD is smaller than a cache line,
2346 * netdev_alloc_skb() will cause skb->data to be misaligned
2347 * to a cache line boundary. If this is the case, include
2348 * some extra space to allow re-aligning the data area.
2349 */
2350 mp->skb_size += SKB_DMA_REALIGN;
2351 }
2352
2353 static int mv643xx_eth_open(struct net_device *dev)
2354 {
2355 struct mv643xx_eth_private *mp = netdev_priv(dev);
2356 int err;
2357 int i;
2358
2359 wrlp(mp, INT_CAUSE, 0);
2360 wrlp(mp, INT_CAUSE_EXT, 0);
2361 rdlp(mp, INT_CAUSE_EXT);
2362
2363 err = request_irq(dev->irq, mv643xx_eth_irq,
2364 IRQF_SHARED, dev->name, dev);
2365 if (err) {
2366 dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
2367 return -EAGAIN;
2368 }
2369
2370 mv643xx_eth_recalc_skb_size(mp);
2371
2372 napi_enable(&mp->napi);
2373
2374 skb_queue_head_init(&mp->rx_recycle);
2375
2376 mp->int_mask = INT_EXT;
2377
2378 for (i = 0; i < mp->rxq_count; i++) {
2379 err = rxq_init(mp, i);
2380 if (err) {
2381 while (--i >= 0)
2382 rxq_deinit(mp->rxq + i);
2383 goto out;
2384 }
2385
2386 rxq_refill(mp->rxq + i, INT_MAX);
2387 mp->int_mask |= INT_RX_0 << i;
2388 }
2389
2390 if (mp->oom) {
2391 mp->rx_oom.expires = jiffies + (HZ / 10);
2392 add_timer(&mp->rx_oom);
2393 }
2394
2395 for (i = 0; i < mp->txq_count; i++) {
2396 err = txq_init(mp, i);
2397 if (err) {
2398 while (--i >= 0)
2399 txq_deinit(mp->txq + i);
2400 goto out_free;
2401 }
2402 mp->int_mask |= INT_TX_END_0 << i;
2403 }
2404
2405 port_start(mp);
2406
2407 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2408 wrlp(mp, INT_MASK, mp->int_mask);
2409
2410 return 0;
2411
2412
2413 out_free:
2414 for (i = 0; i < mp->rxq_count; i++)
2415 rxq_deinit(mp->rxq + i);
2416 out:
2417 free_irq(dev->irq, dev);
2418
2419 return err;
2420 }
2421
2422 static void port_reset(struct mv643xx_eth_private *mp)
2423 {
2424 unsigned int data;
2425 int i;
2426
2427 for (i = 0; i < mp->rxq_count; i++)
2428 rxq_disable(mp->rxq + i);
2429 for (i = 0; i < mp->txq_count; i++)
2430 txq_disable(mp->txq + i);
2431
2432 while (1) {
2433 u32 ps = rdlp(mp, PORT_STATUS);
2434
2435 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2436 break;
2437 udelay(10);
2438 }
2439
2440 /* Reset the Enable bit in the Configuration Register */
2441 data = rdlp(mp, PORT_SERIAL_CONTROL);
2442 data &= ~(SERIAL_PORT_ENABLE |
2443 DO_NOT_FORCE_LINK_FAIL |
2444 FORCE_LINK_PASS);
2445 wrlp(mp, PORT_SERIAL_CONTROL, data);
2446 }
2447
2448 static int mv643xx_eth_stop(struct net_device *dev)
2449 {
2450 struct mv643xx_eth_private *mp = netdev_priv(dev);
2451 int i;
2452
2453 wrlp(mp, INT_MASK_EXT, 0x00000000);
2454 wrlp(mp, INT_MASK, 0x00000000);
2455 rdlp(mp, INT_MASK);
2456
2457 napi_disable(&mp->napi);
2458
2459 del_timer_sync(&mp->rx_oom);
2460
2461 netif_carrier_off(dev);
2462
2463 free_irq(dev->irq, dev);
2464
2465 port_reset(mp);
2466 mv643xx_eth_get_stats(dev);
2467 mib_counters_update(mp);
2468 del_timer_sync(&mp->mib_counters_timer);
2469
2470 skb_queue_purge(&mp->rx_recycle);
2471
2472 for (i = 0; i < mp->rxq_count; i++)
2473 rxq_deinit(mp->rxq + i);
2474 for (i = 0; i < mp->txq_count; i++)
2475 txq_deinit(mp->txq + i);
2476
2477 return 0;
2478 }
2479
2480 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2481 {
2482 struct mv643xx_eth_private *mp = netdev_priv(dev);
2483
2484 if (mp->phy != NULL)
2485 return phy_mii_ioctl(mp->phy, if_mii(ifr), cmd);
2486
2487 return -EOPNOTSUPP;
2488 }
2489
2490 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2491 {
2492 struct mv643xx_eth_private *mp = netdev_priv(dev);
2493
2494 if (new_mtu < 64 || new_mtu > 9500)
2495 return -EINVAL;
2496
2497 dev->mtu = new_mtu;
2498 mv643xx_eth_recalc_skb_size(mp);
2499 tx_set_rate(mp, 1000000000, 16777216);
2500
2501 if (!netif_running(dev))
2502 return 0;
2503
2504 /*
2505 * Stop and then re-open the interface. This will allocate RX
2506 * skbs of the new MTU.
2507 * There is a possible danger that the open will not succeed,
2508 * due to memory being full.
2509 */
2510 mv643xx_eth_stop(dev);
2511 if (mv643xx_eth_open(dev)) {
2512 dev_printk(KERN_ERR, &dev->dev,
2513 "fatal error on re-opening device after "
2514 "MTU change\n");
2515 }
2516
2517 return 0;
2518 }
2519
2520 static void tx_timeout_task(struct work_struct *ugly)
2521 {
2522 struct mv643xx_eth_private *mp;
2523
2524 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2525 if (netif_running(mp->dev)) {
2526 netif_tx_stop_all_queues(mp->dev);
2527 port_reset(mp);
2528 port_start(mp);
2529 netif_tx_wake_all_queues(mp->dev);
2530 }
2531 }
2532
2533 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2534 {
2535 struct mv643xx_eth_private *mp = netdev_priv(dev);
2536
2537 dev_printk(KERN_INFO, &dev->dev, "tx timeout\n");
2538
2539 schedule_work(&mp->tx_timeout_task);
2540 }
2541
2542 #ifdef CONFIG_NET_POLL_CONTROLLER
2543 static void mv643xx_eth_netpoll(struct net_device *dev)
2544 {
2545 struct mv643xx_eth_private *mp = netdev_priv(dev);
2546
2547 wrlp(mp, INT_MASK, 0x00000000);
2548 rdlp(mp, INT_MASK);
2549
2550 mv643xx_eth_irq(dev->irq, dev);
2551
2552 wrlp(mp, INT_MASK, mp->int_mask);
2553 }
2554 #endif
2555
2556
2557 /* platform glue ************************************************************/
2558 static void
2559 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2560 struct mbus_dram_target_info *dram)
2561 {
2562 void __iomem *base = msp->base;
2563 u32 win_enable;
2564 u32 win_protect;
2565 int i;
2566
2567 for (i = 0; i < 6; i++) {
2568 writel(0, base + WINDOW_BASE(i));
2569 writel(0, base + WINDOW_SIZE(i));
2570 if (i < 4)
2571 writel(0, base + WINDOW_REMAP_HIGH(i));
2572 }
2573
2574 win_enable = 0x3f;
2575 win_protect = 0;
2576
2577 for (i = 0; i < dram->num_cs; i++) {
2578 struct mbus_dram_window *cs = dram->cs + i;
2579
2580 writel((cs->base & 0xffff0000) |
2581 (cs->mbus_attr << 8) |
2582 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2583 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2584
2585 win_enable &= ~(1 << i);
2586 win_protect |= 3 << (2 * i);
2587 }
2588
2589 writel(win_enable, base + WINDOW_BAR_ENABLE);
2590 msp->win_protect = win_protect;
2591 }
2592
2593 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2594 {
2595 /*
2596 * Check whether we have a 14-bit coal limit field in bits
2597 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2598 * SDMA config register.
2599 */
2600 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2601 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2602 msp->extended_rx_coal_limit = 1;
2603 else
2604 msp->extended_rx_coal_limit = 0;
2605
2606 /*
2607 * Check whether the MAC supports TX rate control, and if
2608 * yes, whether its associated registers are in the old or
2609 * the new place.
2610 */
2611 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2612 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2613 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2614 } else {
2615 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2616 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2617 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2618 else
2619 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2620 }
2621 }
2622
2623 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2624 {
2625 static int mv643xx_eth_version_printed;
2626 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2627 struct mv643xx_eth_shared_private *msp;
2628 struct resource *res;
2629 int ret;
2630
2631 if (!mv643xx_eth_version_printed++)
2632 printk(KERN_NOTICE "MV-643xx 10/100/1000 ethernet "
2633 "driver version %s\n", mv643xx_eth_driver_version);
2634
2635 ret = -EINVAL;
2636 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2637 if (res == NULL)
2638 goto out;
2639
2640 ret = -ENOMEM;
2641 msp = kmalloc(sizeof(*msp), GFP_KERNEL);
2642 if (msp == NULL)
2643 goto out;
2644 memset(msp, 0, sizeof(*msp));
2645
2646 msp->base = ioremap(res->start, res->end - res->start + 1);
2647 if (msp->base == NULL)
2648 goto out_free;
2649
2650 /*
2651 * Set up and register SMI bus.
2652 */
2653 if (pd == NULL || pd->shared_smi == NULL) {
2654 msp->smi_bus = mdiobus_alloc();
2655 if (msp->smi_bus == NULL)
2656 goto out_unmap;
2657
2658 msp->smi_bus->priv = msp;
2659 msp->smi_bus->name = "mv643xx_eth smi";
2660 msp->smi_bus->read = smi_bus_read;
2661 msp->smi_bus->write = smi_bus_write,
2662 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2663 msp->smi_bus->parent = &pdev->dev;
2664 msp->smi_bus->phy_mask = 0xffffffff;
2665 if (mdiobus_register(msp->smi_bus) < 0)
2666 goto out_free_mii_bus;
2667 msp->smi = msp;
2668 } else {
2669 msp->smi = platform_get_drvdata(pd->shared_smi);
2670 }
2671
2672 msp->err_interrupt = NO_IRQ;
2673 init_waitqueue_head(&msp->smi_busy_wait);
2674
2675 /*
2676 * Check whether the error interrupt is hooked up.
2677 */
2678 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2679 if (res != NULL) {
2680 int err;
2681
2682 err = request_irq(res->start, mv643xx_eth_err_irq,
2683 IRQF_SHARED, "mv643xx_eth", msp);
2684 if (!err) {
2685 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2686 msp->err_interrupt = res->start;
2687 }
2688 }
2689
2690 /*
2691 * (Re-)program MBUS remapping windows if we are asked to.
2692 */
2693 if (pd != NULL && pd->dram != NULL)
2694 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2695
2696 /*
2697 * Detect hardware parameters.
2698 */
2699 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2700 infer_hw_params(msp);
2701
2702 platform_set_drvdata(pdev, msp);
2703
2704 return 0;
2705
2706 out_free_mii_bus:
2707 mdiobus_free(msp->smi_bus);
2708 out_unmap:
2709 iounmap(msp->base);
2710 out_free:
2711 kfree(msp);
2712 out:
2713 return ret;
2714 }
2715
2716 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2717 {
2718 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2719 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2720
2721 if (pd == NULL || pd->shared_smi == NULL) {
2722 mdiobus_unregister(msp->smi_bus);
2723 mdiobus_free(msp->smi_bus);
2724 }
2725 if (msp->err_interrupt != NO_IRQ)
2726 free_irq(msp->err_interrupt, msp);
2727 iounmap(msp->base);
2728 kfree(msp);
2729
2730 return 0;
2731 }
2732
2733 static struct platform_driver mv643xx_eth_shared_driver = {
2734 .probe = mv643xx_eth_shared_probe,
2735 .remove = mv643xx_eth_shared_remove,
2736 .driver = {
2737 .name = MV643XX_ETH_SHARED_NAME,
2738 .owner = THIS_MODULE,
2739 },
2740 };
2741
2742 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2743 {
2744 int addr_shift = 5 * mp->port_num;
2745 u32 data;
2746
2747 data = rdl(mp, PHY_ADDR);
2748 data &= ~(0x1f << addr_shift);
2749 data |= (phy_addr & 0x1f) << addr_shift;
2750 wrl(mp, PHY_ADDR, data);
2751 }
2752
2753 static int phy_addr_get(struct mv643xx_eth_private *mp)
2754 {
2755 unsigned int data;
2756
2757 data = rdl(mp, PHY_ADDR);
2758
2759 return (data >> (5 * mp->port_num)) & 0x1f;
2760 }
2761
2762 static void set_params(struct mv643xx_eth_private *mp,
2763 struct mv643xx_eth_platform_data *pd)
2764 {
2765 struct net_device *dev = mp->dev;
2766
2767 if (is_valid_ether_addr(pd->mac_addr))
2768 memcpy(dev->dev_addr, pd->mac_addr, 6);
2769 else
2770 uc_addr_get(mp, dev->dev_addr);
2771
2772 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2773 if (pd->rx_queue_size)
2774 mp->rx_ring_size = pd->rx_queue_size;
2775 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2776 mp->rx_desc_sram_size = pd->rx_sram_size;
2777
2778 mp->rxq_count = pd->rx_queue_count ? : 1;
2779
2780 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2781 if (pd->tx_queue_size)
2782 mp->tx_ring_size = pd->tx_queue_size;
2783 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2784 mp->tx_desc_sram_size = pd->tx_sram_size;
2785
2786 mp->txq_count = pd->tx_queue_count ? : 1;
2787 }
2788
2789 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2790 int phy_addr)
2791 {
2792 struct mii_bus *bus = mp->shared->smi->smi_bus;
2793 struct phy_device *phydev;
2794 int start;
2795 int num;
2796 int i;
2797
2798 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2799 start = phy_addr_get(mp) & 0x1f;
2800 num = 32;
2801 } else {
2802 start = phy_addr & 0x1f;
2803 num = 1;
2804 }
2805
2806 phydev = NULL;
2807 for (i = 0; i < num; i++) {
2808 int addr = (start + i) & 0x1f;
2809
2810 if (bus->phy_map[addr] == NULL)
2811 mdiobus_scan(bus, addr);
2812
2813 if (phydev == NULL) {
2814 phydev = bus->phy_map[addr];
2815 if (phydev != NULL)
2816 phy_addr_set(mp, addr);
2817 }
2818 }
2819
2820 return phydev;
2821 }
2822
2823 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2824 {
2825 struct phy_device *phy = mp->phy;
2826
2827 phy_reset(mp);
2828
2829 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2830
2831 if (speed == 0) {
2832 phy->autoneg = AUTONEG_ENABLE;
2833 phy->speed = 0;
2834 phy->duplex = 0;
2835 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2836 } else {
2837 phy->autoneg = AUTONEG_DISABLE;
2838 phy->advertising = 0;
2839 phy->speed = speed;
2840 phy->duplex = duplex;
2841 }
2842 phy_start_aneg(phy);
2843 }
2844
2845 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2846 {
2847 u32 pscr;
2848
2849 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2850 if (pscr & SERIAL_PORT_ENABLE) {
2851 pscr &= ~SERIAL_PORT_ENABLE;
2852 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2853 }
2854
2855 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2856 if (mp->phy == NULL) {
2857 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2858 if (speed == SPEED_1000)
2859 pscr |= SET_GMII_SPEED_TO_1000;
2860 else if (speed == SPEED_100)
2861 pscr |= SET_MII_SPEED_TO_100;
2862
2863 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2864
2865 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2866 if (duplex == DUPLEX_FULL)
2867 pscr |= SET_FULL_DUPLEX_MODE;
2868 }
2869
2870 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2871 }
2872
2873 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2874 .ndo_open = mv643xx_eth_open,
2875 .ndo_stop = mv643xx_eth_stop,
2876 .ndo_start_xmit = mv643xx_eth_xmit,
2877 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2878 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2879 .ndo_do_ioctl = mv643xx_eth_ioctl,
2880 .ndo_change_mtu = mv643xx_eth_change_mtu,
2881 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2882 .ndo_get_stats = mv643xx_eth_get_stats,
2883 #ifdef CONFIG_NET_POLL_CONTROLLER
2884 .ndo_poll_controller = mv643xx_eth_netpoll,
2885 #endif
2886 };
2887
2888 static int mv643xx_eth_probe(struct platform_device *pdev)
2889 {
2890 struct mv643xx_eth_platform_data *pd;
2891 struct mv643xx_eth_private *mp;
2892 struct net_device *dev;
2893 struct resource *res;
2894 int err;
2895
2896 pd = pdev->dev.platform_data;
2897 if (pd == NULL) {
2898 dev_printk(KERN_ERR, &pdev->dev,
2899 "no mv643xx_eth_platform_data\n");
2900 return -ENODEV;
2901 }
2902
2903 if (pd->shared == NULL) {
2904 dev_printk(KERN_ERR, &pdev->dev,
2905 "no mv643xx_eth_platform_data->shared\n");
2906 return -ENODEV;
2907 }
2908
2909 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2910 if (!dev)
2911 return -ENOMEM;
2912
2913 mp = netdev_priv(dev);
2914 platform_set_drvdata(pdev, mp);
2915
2916 mp->shared = platform_get_drvdata(pd->shared);
2917 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2918 mp->port_num = pd->port_number;
2919
2920 mp->dev = dev;
2921
2922 set_params(mp, pd);
2923 dev->real_num_tx_queues = mp->txq_count;
2924
2925 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2926 mp->phy = phy_scan(mp, pd->phy_addr);
2927
2928 if (mp->phy != NULL)
2929 phy_init(mp, pd->speed, pd->duplex);
2930
2931 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2932
2933 init_pscr(mp, pd->speed, pd->duplex);
2934
2935
2936 mib_counters_clear(mp);
2937
2938 init_timer(&mp->mib_counters_timer);
2939 mp->mib_counters_timer.data = (unsigned long)mp;
2940 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2941 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2942 add_timer(&mp->mib_counters_timer);
2943
2944 spin_lock_init(&mp->mib_counters_lock);
2945
2946 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2947
2948 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2949
2950 init_timer(&mp->rx_oom);
2951 mp->rx_oom.data = (unsigned long)mp;
2952 mp->rx_oom.function = oom_timer_wrapper;
2953
2954
2955 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2956 BUG_ON(!res);
2957 dev->irq = res->start;
2958
2959 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2960
2961 dev->watchdog_timeo = 2 * HZ;
2962 dev->base_addr = 0;
2963
2964 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2965 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2966
2967 SET_NETDEV_DEV(dev, &pdev->dev);
2968
2969 if (mp->shared->win_protect)
2970 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2971
2972 netif_carrier_off(dev);
2973
2974 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2975
2976 set_rx_coal(mp, 250);
2977 set_tx_coal(mp, 0);
2978
2979 err = register_netdev(dev);
2980 if (err)
2981 goto out;
2982
2983 dev_printk(KERN_NOTICE, &dev->dev, "port %d with MAC address %pM\n",
2984 mp->port_num, dev->dev_addr);
2985
2986 if (mp->tx_desc_sram_size > 0)
2987 dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
2988
2989 return 0;
2990
2991 out:
2992 free_netdev(dev);
2993
2994 return err;
2995 }
2996
2997 static int mv643xx_eth_remove(struct platform_device *pdev)
2998 {
2999 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3000
3001 unregister_netdev(mp->dev);
3002 if (mp->phy != NULL)
3003 phy_detach(mp->phy);
3004 flush_scheduled_work();
3005 free_netdev(mp->dev);
3006
3007 platform_set_drvdata(pdev, NULL);
3008
3009 return 0;
3010 }
3011
3012 static void mv643xx_eth_shutdown(struct platform_device *pdev)
3013 {
3014 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3015
3016 /* Mask all interrupts on ethernet port */
3017 wrlp(mp, INT_MASK, 0);
3018 rdlp(mp, INT_MASK);
3019
3020 if (netif_running(mp->dev))
3021 port_reset(mp);
3022 }
3023
3024 static struct platform_driver mv643xx_eth_driver = {
3025 .probe = mv643xx_eth_probe,
3026 .remove = mv643xx_eth_remove,
3027 .shutdown = mv643xx_eth_shutdown,
3028 .driver = {
3029 .name = MV643XX_ETH_NAME,
3030 .owner = THIS_MODULE,
3031 },
3032 };
3033
3034 static int __init mv643xx_eth_init_module(void)
3035 {
3036 int rc;
3037
3038 rc = platform_driver_register(&mv643xx_eth_shared_driver);
3039 if (!rc) {
3040 rc = platform_driver_register(&mv643xx_eth_driver);
3041 if (rc)
3042 platform_driver_unregister(&mv643xx_eth_shared_driver);
3043 }
3044
3045 return rc;
3046 }
3047 module_init(mv643xx_eth_init_module);
3048
3049 static void __exit mv643xx_eth_cleanup_module(void)
3050 {
3051 platform_driver_unregister(&mv643xx_eth_driver);
3052 platform_driver_unregister(&mv643xx_eth_shared_driver);
3053 }
3054 module_exit(mv643xx_eth_cleanup_module);
3055
3056 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3057 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3058 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3059 MODULE_LICENSE("GPL");
3060 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3061 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux kernel - Deliverables
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