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befs: Validate length of long symbolic links.
[linux-2.6/kvm.git] / drivers / net / mv643xx_eth.c
blob259699983ca51c272a3ee42bfd4d922c85238440
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39
40 #include <linux/init.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/in.h>
43 #include <linux/ip.h>
44 #include <linux/tcp.h>
45 #include <linux/udp.h>
46 #include <linux/etherdevice.h>
47 #include <linux/delay.h>
48 #include <linux/ethtool.h>
49 #include <linux/platform_device.h>
50 #include <linux/module.h>
51 #include <linux/kernel.h>
52 #include <linux/spinlock.h>
53 #include <linux/workqueue.h>
54 #include <linux/phy.h>
55 #include <linux/mv643xx_eth.h>
56 #include <linux/io.h>
57 #include <linux/types.h>
58 #include <linux/inet_lro.h>
59 #include <linux/slab.h>
60 #include <asm/system.h>
61
62 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
63 static char mv643xx_eth_driver_version[] = "1.4";
64
65
66 /*
67 * Registers shared between all ports.
68 */
69 #define PHY_ADDR 0x0000
70 #define SMI_REG 0x0004
71 #define SMI_BUSY 0x10000000
72 #define SMI_READ_VALID 0x08000000
73 #define SMI_OPCODE_READ 0x04000000
74 #define SMI_OPCODE_WRITE 0x00000000
75 #define ERR_INT_CAUSE 0x0080
76 #define ERR_INT_SMI_DONE 0x00000010
77 #define ERR_INT_MASK 0x0084
78 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
79 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
80 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
81 #define WINDOW_BAR_ENABLE 0x0290
82 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
83
84 /*
85 * Main per-port registers. These live at offset 0x0400 for
86 * port #0, 0x0800 for port #1, and 0x0c00 for port #2.
87 */
88 #define PORT_CONFIG 0x0000
89 #define UNICAST_PROMISCUOUS_MODE 0x00000001
90 #define PORT_CONFIG_EXT 0x0004
91 #define MAC_ADDR_LOW 0x0014
92 #define MAC_ADDR_HIGH 0x0018
93 #define SDMA_CONFIG 0x001c
94 #define TX_BURST_SIZE_16_64BIT 0x01000000
95 #define TX_BURST_SIZE_4_64BIT 0x00800000
96 #define BLM_TX_NO_SWAP 0x00000020
97 #define BLM_RX_NO_SWAP 0x00000010
98 #define RX_BURST_SIZE_16_64BIT 0x00000008
99 #define RX_BURST_SIZE_4_64BIT 0x00000004
100 #define PORT_SERIAL_CONTROL 0x003c
101 #define SET_MII_SPEED_TO_100 0x01000000
102 #define SET_GMII_SPEED_TO_1000 0x00800000
103 #define SET_FULL_DUPLEX_MODE 0x00200000
104 #define MAX_RX_PACKET_9700BYTE 0x000a0000
105 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000
106 #define DO_NOT_FORCE_LINK_FAIL 0x00000400
107 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200
108 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008
109 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004
110 #define FORCE_LINK_PASS 0x00000002
111 #define SERIAL_PORT_ENABLE 0x00000001
112 #define PORT_STATUS 0x0044
113 #define TX_FIFO_EMPTY 0x00000400
114 #define TX_IN_PROGRESS 0x00000080
115 #define PORT_SPEED_MASK 0x00000030
116 #define PORT_SPEED_1000 0x00000010
117 #define PORT_SPEED_100 0x00000020
118 #define PORT_SPEED_10 0x00000000
119 #define FLOW_CONTROL_ENABLED 0x00000008
120 #define FULL_DUPLEX 0x00000004
121 #define LINK_UP 0x00000002
122 #define TXQ_COMMAND 0x0048
123 #define TXQ_FIX_PRIO_CONF 0x004c
124 #define TX_BW_RATE 0x0050
125 #define TX_BW_MTU 0x0058
126 #define TX_BW_BURST 0x005c
127 #define INT_CAUSE 0x0060
128 #define INT_TX_END 0x07f80000
129 #define INT_TX_END_0 0x00080000
130 #define INT_RX 0x000003fc
131 #define INT_RX_0 0x00000004
132 #define INT_EXT 0x00000002
133 #define INT_CAUSE_EXT 0x0064
134 #define INT_EXT_LINK_PHY 0x00110000
135 #define INT_EXT_TX 0x000000ff
136 #define INT_MASK 0x0068
137 #define INT_MASK_EXT 0x006c
138 #define TX_FIFO_URGENT_THRESHOLD 0x0074
139 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
140 #define TX_BW_RATE_MOVED 0x00e0
141 #define TX_BW_MTU_MOVED 0x00e8
142 #define TX_BW_BURST_MOVED 0x00ec
143 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
144 #define RXQ_COMMAND 0x0280
145 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
146 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
147 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
148 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
149
150 /*
151 * Misc per-port registers.
152 */
153 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
154 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
155 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
156 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
157
158
159 /*
160 * SDMA configuration register default value.
161 */
162 #if defined(__BIG_ENDIAN)
163 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
164 (RX_BURST_SIZE_4_64BIT | \
165 TX_BURST_SIZE_4_64BIT)
166 #elif defined(__LITTLE_ENDIAN)
167 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
168 (RX_BURST_SIZE_4_64BIT | \
169 BLM_RX_NO_SWAP | \
170 BLM_TX_NO_SWAP | \
171 TX_BURST_SIZE_4_64BIT)
172 #else
173 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
174 #endif
175
176
177 /*
178 * Misc definitions.
179 */
180 #define DEFAULT_RX_QUEUE_SIZE 128
181 #define DEFAULT_TX_QUEUE_SIZE 256
182 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES)
183
184
185 /*
186 * RX/TX descriptors.
187 */
188 #if defined(__BIG_ENDIAN)
189 struct rx_desc {
190 u16 byte_cnt; /* Descriptor buffer byte count */
191 u16 buf_size; /* Buffer size */
192 u32 cmd_sts; /* Descriptor command status */
193 u32 next_desc_ptr; /* Next descriptor pointer */
194 u32 buf_ptr; /* Descriptor buffer pointer */
195 };
196
197 struct tx_desc {
198 u16 byte_cnt; /* buffer byte count */
199 u16 l4i_chk; /* CPU provided TCP checksum */
200 u32 cmd_sts; /* Command/status field */
201 u32 next_desc_ptr; /* Pointer to next descriptor */
202 u32 buf_ptr; /* pointer to buffer for this descriptor*/
203 };
204 #elif defined(__LITTLE_ENDIAN)
205 struct rx_desc {
206 u32 cmd_sts; /* Descriptor command status */
207 u16 buf_size; /* Buffer size */
208 u16 byte_cnt; /* Descriptor buffer byte count */
209 u32 buf_ptr; /* Descriptor buffer pointer */
210 u32 next_desc_ptr; /* Next descriptor pointer */
211 };
212
213 struct tx_desc {
214 u32 cmd_sts; /* Command/status field */
215 u16 l4i_chk; /* CPU provided TCP checksum */
216 u16 byte_cnt; /* buffer byte count */
217 u32 buf_ptr; /* pointer to buffer for this descriptor*/
218 u32 next_desc_ptr; /* Pointer to next descriptor */
219 };
220 #else
221 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
222 #endif
223
224 /* RX & TX descriptor command */
225 #define BUFFER_OWNED_BY_DMA 0x80000000
226
227 /* RX & TX descriptor status */
228 #define ERROR_SUMMARY 0x00000001
229
230 /* RX descriptor status */
231 #define LAYER_4_CHECKSUM_OK 0x40000000
232 #define RX_ENABLE_INTERRUPT 0x20000000
233 #define RX_FIRST_DESC 0x08000000
234 #define RX_LAST_DESC 0x04000000
235 #define RX_IP_HDR_OK 0x02000000
236 #define RX_PKT_IS_IPV4 0x01000000
237 #define RX_PKT_IS_ETHERNETV2 0x00800000
238 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
239 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
240 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
241
242 /* TX descriptor command */
243 #define TX_ENABLE_INTERRUPT 0x00800000
244 #define GEN_CRC 0x00400000
245 #define TX_FIRST_DESC 0x00200000
246 #define TX_LAST_DESC 0x00100000
247 #define ZERO_PADDING 0x00080000
248 #define GEN_IP_V4_CHECKSUM 0x00040000
249 #define GEN_TCP_UDP_CHECKSUM 0x00020000
250 #define UDP_FRAME 0x00010000
251 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
252 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
253
254 #define TX_IHL_SHIFT 11
255
256
257 /* global *******************************************************************/
258 struct mv643xx_eth_shared_private {
259 /*
260 * Ethernet controller base address.
261 */
262 void __iomem *base;
263
264 /*
265 * Points at the right SMI instance to use.
266 */
267 struct mv643xx_eth_shared_private *smi;
268
269 /*
270 * Provides access to local SMI interface.
271 */
272 struct mii_bus *smi_bus;
273
274 /*
275 * If we have access to the error interrupt pin (which is
276 * somewhat misnamed as it not only reflects internal errors
277 * but also reflects SMI completion), use that to wait for
278 * SMI access completion instead of polling the SMI busy bit.
279 */
280 int err_interrupt;
281 wait_queue_head_t smi_busy_wait;
282
283 /*
284 * Per-port MBUS window access register value.
285 */
286 u32 win_protect;
287
288 /*
289 * Hardware-specific parameters.
290 */
291 unsigned int t_clk;
292 int extended_rx_coal_limit;
293 int tx_bw_control;
294 int tx_csum_limit;
295 };
296
297 #define TX_BW_CONTROL_ABSENT 0
298 #define TX_BW_CONTROL_OLD_LAYOUT 1
299 #define TX_BW_CONTROL_NEW_LAYOUT 2
300
301 static int mv643xx_eth_open(struct net_device *dev);
302 static int mv643xx_eth_stop(struct net_device *dev);
303
304
305 /* per-port *****************************************************************/
306 struct mib_counters {
307 u64 good_octets_received;
308 u32 bad_octets_received;
309 u32 internal_mac_transmit_err;
310 u32 good_frames_received;
311 u32 bad_frames_received;
312 u32 broadcast_frames_received;
313 u32 multicast_frames_received;
314 u32 frames_64_octets;
315 u32 frames_65_to_127_octets;
316 u32 frames_128_to_255_octets;
317 u32 frames_256_to_511_octets;
318 u32 frames_512_to_1023_octets;
319 u32 frames_1024_to_max_octets;
320 u64 good_octets_sent;
321 u32 good_frames_sent;
322 u32 excessive_collision;
323 u32 multicast_frames_sent;
324 u32 broadcast_frames_sent;
325 u32 unrec_mac_control_received;
326 u32 fc_sent;
327 u32 good_fc_received;
328 u32 bad_fc_received;
329 u32 undersize_received;
330 u32 fragments_received;
331 u32 oversize_received;
332 u32 jabber_received;
333 u32 mac_receive_error;
334 u32 bad_crc_event;
335 u32 collision;
336 u32 late_collision;
337 };
338
339 struct lro_counters {
340 u32 lro_aggregated;
341 u32 lro_flushed;
342 u32 lro_no_desc;
343 };
344
345 struct rx_queue {
346 int index;
347
348 int rx_ring_size;
349
350 int rx_desc_count;
351 int rx_curr_desc;
352 int rx_used_desc;
353
354 struct rx_desc *rx_desc_area;
355 dma_addr_t rx_desc_dma;
356 int rx_desc_area_size;
357 struct sk_buff **rx_skb;
358
359 struct net_lro_mgr lro_mgr;
360 struct net_lro_desc lro_arr[8];
361 };
362
363 struct tx_queue {
364 int index;
365
366 int tx_ring_size;
367
368 int tx_desc_count;
369 int tx_curr_desc;
370 int tx_used_desc;
371
372 struct tx_desc *tx_desc_area;
373 dma_addr_t tx_desc_dma;
374 int tx_desc_area_size;
375
376 struct sk_buff_head tx_skb;
377
378 unsigned long tx_packets;
379 unsigned long tx_bytes;
380 unsigned long tx_dropped;
381 };
382
383 struct mv643xx_eth_private {
384 struct mv643xx_eth_shared_private *shared;
385 void __iomem *base;
386 int port_num;
387
388 struct net_device *dev;
389
390 struct phy_device *phy;
391
392 struct timer_list mib_counters_timer;
393 spinlock_t mib_counters_lock;
394 struct mib_counters mib_counters;
395
396 struct lro_counters lro_counters;
397
398 struct work_struct tx_timeout_task;
399
400 struct napi_struct napi;
401 u32 int_mask;
402 u8 oom;
403 u8 work_link;
404 u8 work_tx;
405 u8 work_tx_end;
406 u8 work_rx;
407 u8 work_rx_refill;
408
409 int skb_size;
410 struct sk_buff_head rx_recycle;
411
412 /*
413 * RX state.
414 */
415 int rx_ring_size;
416 unsigned long rx_desc_sram_addr;
417 int rx_desc_sram_size;
418 int rxq_count;
419 struct timer_list rx_oom;
420 struct rx_queue rxq[8];
421
422 /*
423 * TX state.
424 */
425 int tx_ring_size;
426 unsigned long tx_desc_sram_addr;
427 int tx_desc_sram_size;
428 int txq_count;
429 struct tx_queue txq[8];
430 };
431
432
433 /* port register accessors **************************************************/
434 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
435 {
436 return readl(mp->shared->base + offset);
437 }
438
439 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
440 {
441 return readl(mp->base + offset);
442 }
443
444 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
445 {
446 writel(data, mp->shared->base + offset);
447 }
448
449 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
450 {
451 writel(data, mp->base + offset);
452 }
453
454
455 /* rxq/txq helper functions *************************************************/
456 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
457 {
458 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
459 }
460
461 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
462 {
463 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
464 }
465
466 static void rxq_enable(struct rx_queue *rxq)
467 {
468 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
469 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
470 }
471
472 static void rxq_disable(struct rx_queue *rxq)
473 {
474 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
475 u8 mask = 1 << rxq->index;
476
477 wrlp(mp, RXQ_COMMAND, mask << 8);
478 while (rdlp(mp, RXQ_COMMAND) & mask)
479 udelay(10);
480 }
481
482 static void txq_reset_hw_ptr(struct tx_queue *txq)
483 {
484 struct mv643xx_eth_private *mp = txq_to_mp(txq);
485 u32 addr;
486
487 addr = (u32)txq->tx_desc_dma;
488 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
489 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
490 }
491
492 static void txq_enable(struct tx_queue *txq)
493 {
494 struct mv643xx_eth_private *mp = txq_to_mp(txq);
495 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
496 }
497
498 static void txq_disable(struct tx_queue *txq)
499 {
500 struct mv643xx_eth_private *mp = txq_to_mp(txq);
501 u8 mask = 1 << txq->index;
502
503 wrlp(mp, TXQ_COMMAND, mask << 8);
504 while (rdlp(mp, TXQ_COMMAND) & mask)
505 udelay(10);
506 }
507
508 static void txq_maybe_wake(struct tx_queue *txq)
509 {
510 struct mv643xx_eth_private *mp = txq_to_mp(txq);
511 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
512
513 if (netif_tx_queue_stopped(nq)) {
514 __netif_tx_lock(nq, smp_processor_id());
515 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1)
516 netif_tx_wake_queue(nq);
517 __netif_tx_unlock(nq);
518 }
519 }
520
521
522 /* rx napi ******************************************************************/
523 static int
524 mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph,
525 u64 *hdr_flags, void *priv)
526 {
527 unsigned long cmd_sts = (unsigned long)priv;
528
529 /*
530 * Make sure that this packet is Ethernet II, is not VLAN
531 * tagged, is IPv4, has a valid IP header, and is TCP.
532 */
533 if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
534 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK |
535 RX_PKT_IS_VLAN_TAGGED)) !=
536 (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
537 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4))
538 return -1;
539
540 skb_reset_network_header(skb);
541 skb_set_transport_header(skb, ip_hdrlen(skb));
542 *iphdr = ip_hdr(skb);
543 *tcph = tcp_hdr(skb);
544 *hdr_flags = LRO_IPV4 | LRO_TCP;
545
546 return 0;
547 }
548
549 static int rxq_process(struct rx_queue *rxq, int budget)
550 {
551 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
552 struct net_device_stats *stats = &mp->dev->stats;
553 int lro_flush_needed;
554 int rx;
555
556 lro_flush_needed = 0;
557 rx = 0;
558 while (rx < budget && rxq->rx_desc_count) {
559 struct rx_desc *rx_desc;
560 unsigned int cmd_sts;
561 struct sk_buff *skb;
562 u16 byte_cnt;
563
564 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
565
566 cmd_sts = rx_desc->cmd_sts;
567 if (cmd_sts & BUFFER_OWNED_BY_DMA)
568 break;
569 rmb();
570
571 skb = rxq->rx_skb[rxq->rx_curr_desc];
572 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
573
574 rxq->rx_curr_desc++;
575 if (rxq->rx_curr_desc == rxq->rx_ring_size)
576 rxq->rx_curr_desc = 0;
577
578 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr,
579 rx_desc->buf_size, DMA_FROM_DEVICE);
580 rxq->rx_desc_count--;
581 rx++;
582
583 mp->work_rx_refill |= 1 << rxq->index;
584
585 byte_cnt = rx_desc->byte_cnt;
586
587 /*
588 * Update statistics.
589 *
590 * Note that the descriptor byte count includes 2 dummy
591 * bytes automatically inserted by the hardware at the
592 * start of the packet (which we don't count), and a 4
593 * byte CRC at the end of the packet (which we do count).
594 */
595 stats->rx_packets++;
596 stats->rx_bytes += byte_cnt - 2;
597
598 /*
599 * In case we received a packet without first / last bits
600 * on, or the error summary bit is set, the packet needs
601 * to be dropped.
602 */
603 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
604 != (RX_FIRST_DESC | RX_LAST_DESC))
605 goto err;
606
607 /*
608 * The -4 is for the CRC in the trailer of the
609 * received packet
610 */
611 skb_put(skb, byte_cnt - 2 - 4);
612
613 if (cmd_sts & LAYER_4_CHECKSUM_OK)
614 skb->ip_summed = CHECKSUM_UNNECESSARY;
615 skb->protocol = eth_type_trans(skb, mp->dev);
616
617 if (skb->dev->features & NETIF_F_LRO &&
618 skb->ip_summed == CHECKSUM_UNNECESSARY) {
619 lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts);
620 lro_flush_needed = 1;
621 } else
622 netif_receive_skb(skb);
623
624 continue;
625
626 err:
627 stats->rx_dropped++;
628
629 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
630 (RX_FIRST_DESC | RX_LAST_DESC)) {
631 if (net_ratelimit())
632 netdev_err(mp->dev,
633 "received packet spanning multiple descriptors\n");
634 }
635
636 if (cmd_sts & ERROR_SUMMARY)
637 stats->rx_errors++;
638
639 dev_kfree_skb(skb);
640 }
641
642 if (lro_flush_needed)
643 lro_flush_all(&rxq->lro_mgr);
644
645 if (rx < budget)
646 mp->work_rx &= ~(1 << rxq->index);
647
648 return rx;
649 }
650
651 static int rxq_refill(struct rx_queue *rxq, int budget)
652 {
653 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
654 int refilled;
655
656 refilled = 0;
657 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
658 struct sk_buff *skb;
659 int rx;
660 struct rx_desc *rx_desc;
661 int size;
662
663 skb = __skb_dequeue(&mp->rx_recycle);
664 if (skb == NULL)
665 skb = dev_alloc_skb(mp->skb_size);
666
667 if (skb == NULL) {
668 mp->oom = 1;
669 goto oom;
670 }
671
672 if (SKB_DMA_REALIGN)
673 skb_reserve(skb, SKB_DMA_REALIGN);
674
675 refilled++;
676 rxq->rx_desc_count++;
677
678 rx = rxq->rx_used_desc++;
679 if (rxq->rx_used_desc == rxq->rx_ring_size)
680 rxq->rx_used_desc = 0;
681
682 rx_desc = rxq->rx_desc_area + rx;
683
684 size = skb->end - skb->data;
685 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent,
686 skb->data, size,
687 DMA_FROM_DEVICE);
688 rx_desc->buf_size = size;
689 rxq->rx_skb[rx] = skb;
690 wmb();
691 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
692 wmb();
693
694 /*
695 * The hardware automatically prepends 2 bytes of
696 * dummy data to each received packet, so that the
697 * IP header ends up 16-byte aligned.
698 */
699 skb_reserve(skb, 2);
700 }
701
702 if (refilled < budget)
703 mp->work_rx_refill &= ~(1 << rxq->index);
704
705 oom:
706 return refilled;
707 }
708
709
710 /* tx ***********************************************************************/
711 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
712 {
713 int frag;
714
715 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
716 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
717 if (fragp->size <= 8 && fragp->page_offset & 7)
718 return 1;
719 }
720
721 return 0;
722 }
723
724 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
725 {
726 struct mv643xx_eth_private *mp = txq_to_mp(txq);
727 int nr_frags = skb_shinfo(skb)->nr_frags;
728 int frag;
729
730 for (frag = 0; frag < nr_frags; frag++) {
731 skb_frag_t *this_frag;
732 int tx_index;
733 struct tx_desc *desc;
734
735 this_frag = &skb_shinfo(skb)->frags[frag];
736 tx_index = txq->tx_curr_desc++;
737 if (txq->tx_curr_desc == txq->tx_ring_size)
738 txq->tx_curr_desc = 0;
739 desc = &txq->tx_desc_area[tx_index];
740
741 /*
742 * The last fragment will generate an interrupt
743 * which will free the skb on TX completion.
744 */
745 if (frag == nr_frags - 1) {
746 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
747 ZERO_PADDING | TX_LAST_DESC |
748 TX_ENABLE_INTERRUPT;
749 } else {
750 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
751 }
752
753 desc->l4i_chk = 0;
754 desc->byte_cnt = this_frag->size;
755 desc->buf_ptr = dma_map_page(mp->dev->dev.parent,
756 this_frag->page,
757 this_frag->page_offset,
758 this_frag->size, DMA_TO_DEVICE);
759 }
760 }
761
762 static inline __be16 sum16_as_be(__sum16 sum)
763 {
764 return (__force __be16)sum;
765 }
766
767 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
768 {
769 struct mv643xx_eth_private *mp = txq_to_mp(txq);
770 int nr_frags = skb_shinfo(skb)->nr_frags;
771 int tx_index;
772 struct tx_desc *desc;
773 u32 cmd_sts;
774 u16 l4i_chk;
775 int length;
776
777 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
778 l4i_chk = 0;
779
780 if (skb->ip_summed == CHECKSUM_PARTIAL) {
781 int hdr_len;
782 int tag_bytes;
783
784 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
785 skb->protocol != htons(ETH_P_8021Q));
786
787 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
788 tag_bytes = hdr_len - ETH_HLEN;
789 if (skb->len - hdr_len > mp->shared->tx_csum_limit ||
790 unlikely(tag_bytes & ~12)) {
791 if (skb_checksum_help(skb) == 0)
792 goto no_csum;
793 kfree_skb(skb);
794 return 1;
795 }
796
797 if (tag_bytes & 4)
798 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
799 if (tag_bytes & 8)
800 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
801
802 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
803 GEN_IP_V4_CHECKSUM |
804 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
805
806 switch (ip_hdr(skb)->protocol) {
807 case IPPROTO_UDP:
808 cmd_sts |= UDP_FRAME;
809 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
810 break;
811 case IPPROTO_TCP:
812 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
813 break;
814 default:
815 BUG();
816 }
817 } else {
818 no_csum:
819 /* Errata BTS #50, IHL must be 5 if no HW checksum */
820 cmd_sts |= 5 << TX_IHL_SHIFT;
821 }
822
823 tx_index = txq->tx_curr_desc++;
824 if (txq->tx_curr_desc == txq->tx_ring_size)
825 txq->tx_curr_desc = 0;
826 desc = &txq->tx_desc_area[tx_index];
827
828 if (nr_frags) {
829 txq_submit_frag_skb(txq, skb);
830 length = skb_headlen(skb);
831 } else {
832 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
833 length = skb->len;
834 }
835
836 desc->l4i_chk = l4i_chk;
837 desc->byte_cnt = length;
838 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
839 length, DMA_TO_DEVICE);
840
841 __skb_queue_tail(&txq->tx_skb, skb);
842
843 skb_tx_timestamp(skb);
844
845 /* ensure all other descriptors are written before first cmd_sts */
846 wmb();
847 desc->cmd_sts = cmd_sts;
848
849 /* clear TX_END status */
850 mp->work_tx_end &= ~(1 << txq->index);
851
852 /* ensure all descriptors are written before poking hardware */
853 wmb();
854 txq_enable(txq);
855
856 txq->tx_desc_count += nr_frags + 1;
857
858 return 0;
859 }
860
861 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
862 {
863 struct mv643xx_eth_private *mp = netdev_priv(dev);
864 int length, queue;
865 struct tx_queue *txq;
866 struct netdev_queue *nq;
867
868 queue = skb_get_queue_mapping(skb);
869 txq = mp->txq + queue;
870 nq = netdev_get_tx_queue(dev, queue);
871
872 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
873 txq->tx_dropped++;
874 netdev_printk(KERN_DEBUG, dev,
875 "failed to linearize skb with tiny unaligned fragment\n");
876 return NETDEV_TX_BUSY;
877 }
878
879 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
880 if (net_ratelimit())
881 netdev_err(dev, "tx queue full?!\n");
882 kfree_skb(skb);
883 return NETDEV_TX_OK;
884 }
885
886 length = skb->len;
887
888 if (!txq_submit_skb(txq, skb)) {
889 int entries_left;
890
891 txq->tx_bytes += length;
892 txq->tx_packets++;
893
894 entries_left = txq->tx_ring_size - txq->tx_desc_count;
895 if (entries_left < MAX_SKB_FRAGS + 1)
896 netif_tx_stop_queue(nq);
897 }
898
899 return NETDEV_TX_OK;
900 }
901
902
903 /* tx napi ******************************************************************/
904 static void txq_kick(struct tx_queue *txq)
905 {
906 struct mv643xx_eth_private *mp = txq_to_mp(txq);
907 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
908 u32 hw_desc_ptr;
909 u32 expected_ptr;
910
911 __netif_tx_lock(nq, smp_processor_id());
912
913 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
914 goto out;
915
916 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
917 expected_ptr = (u32)txq->tx_desc_dma +
918 txq->tx_curr_desc * sizeof(struct tx_desc);
919
920 if (hw_desc_ptr != expected_ptr)
921 txq_enable(txq);
922
923 out:
924 __netif_tx_unlock(nq);
925
926 mp->work_tx_end &= ~(1 << txq->index);
927 }
928
929 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
930 {
931 struct mv643xx_eth_private *mp = txq_to_mp(txq);
932 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
933 int reclaimed;
934
935 __netif_tx_lock(nq, smp_processor_id());
936
937 reclaimed = 0;
938 while (reclaimed < budget && txq->tx_desc_count > 0) {
939 int tx_index;
940 struct tx_desc *desc;
941 u32 cmd_sts;
942 struct sk_buff *skb;
943
944 tx_index = txq->tx_used_desc;
945 desc = &txq->tx_desc_area[tx_index];
946 cmd_sts = desc->cmd_sts;
947
948 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
949 if (!force)
950 break;
951 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
952 }
953
954 txq->tx_used_desc = tx_index + 1;
955 if (txq->tx_used_desc == txq->tx_ring_size)
956 txq->tx_used_desc = 0;
957
958 reclaimed++;
959 txq->tx_desc_count--;
960
961 skb = NULL;
962 if (cmd_sts & TX_LAST_DESC)
963 skb = __skb_dequeue(&txq->tx_skb);
964
965 if (cmd_sts & ERROR_SUMMARY) {
966 netdev_info(mp->dev, "tx error\n");
967 mp->dev->stats.tx_errors++;
968 }
969
970 if (cmd_sts & TX_FIRST_DESC) {
971 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
972 desc->byte_cnt, DMA_TO_DEVICE);
973 } else {
974 dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr,
975 desc->byte_cnt, DMA_TO_DEVICE);
976 }
977
978 if (skb != NULL) {
979 if (skb_queue_len(&mp->rx_recycle) <
980 mp->rx_ring_size &&
981 skb_recycle_check(skb, mp->skb_size))
982 __skb_queue_head(&mp->rx_recycle, skb);
983 else
984 dev_kfree_skb(skb);
985 }
986 }
987
988 __netif_tx_unlock(nq);
989
990 if (reclaimed < budget)
991 mp->work_tx &= ~(1 << txq->index);
992
993 return reclaimed;
994 }
995
996
997 /* tx rate control **********************************************************/
998 /*
999 * Set total maximum TX rate (shared by all TX queues for this port)
1000 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
1001 */
1002 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
1003 {
1004 int token_rate;
1005 int mtu;
1006 int bucket_size;
1007
1008 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1009 if (token_rate > 1023)
1010 token_rate = 1023;
1011
1012 mtu = (mp->dev->mtu + 255) >> 8;
1013 if (mtu > 63)
1014 mtu = 63;
1015
1016 bucket_size = (burst + 255) >> 8;
1017 if (bucket_size > 65535)
1018 bucket_size = 65535;
1019
1020 switch (mp->shared->tx_bw_control) {
1021 case TX_BW_CONTROL_OLD_LAYOUT:
1022 wrlp(mp, TX_BW_RATE, token_rate);
1023 wrlp(mp, TX_BW_MTU, mtu);
1024 wrlp(mp, TX_BW_BURST, bucket_size);
1025 break;
1026 case TX_BW_CONTROL_NEW_LAYOUT:
1027 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1028 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1029 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1030 break;
1031 }
1032 }
1033
1034 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1035 {
1036 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1037 int token_rate;
1038 int bucket_size;
1039
1040 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1041 if (token_rate > 1023)
1042 token_rate = 1023;
1043
1044 bucket_size = (burst + 255) >> 8;
1045 if (bucket_size > 65535)
1046 bucket_size = 65535;
1047
1048 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1049 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1050 }
1051
1052 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1053 {
1054 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1055 int off;
1056 u32 val;
1057
1058 /*
1059 * Turn on fixed priority mode.
1060 */
1061 off = 0;
1062 switch (mp->shared->tx_bw_control) {
1063 case TX_BW_CONTROL_OLD_LAYOUT:
1064 off = TXQ_FIX_PRIO_CONF;
1065 break;
1066 case TX_BW_CONTROL_NEW_LAYOUT:
1067 off = TXQ_FIX_PRIO_CONF_MOVED;
1068 break;
1069 }
1070
1071 if (off) {
1072 val = rdlp(mp, off);
1073 val |= 1 << txq->index;
1074 wrlp(mp, off, val);
1075 }
1076 }
1077
1078
1079 /* mii management interface *************************************************/
1080 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1081 {
1082 struct mv643xx_eth_shared_private *msp = dev_id;
1083
1084 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1085 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1086 wake_up(&msp->smi_busy_wait);
1087 return IRQ_HANDLED;
1088 }
1089
1090 return IRQ_NONE;
1091 }
1092
1093 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1094 {
1095 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1096 }
1097
1098 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1099 {
1100 if (msp->err_interrupt == NO_IRQ) {
1101 int i;
1102
1103 for (i = 0; !smi_is_done(msp); i++) {
1104 if (i == 10)
1105 return -ETIMEDOUT;
1106 msleep(10);
1107 }
1108
1109 return 0;
1110 }
1111
1112 if (!smi_is_done(msp)) {
1113 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1114 msecs_to_jiffies(100));
1115 if (!smi_is_done(msp))
1116 return -ETIMEDOUT;
1117 }
1118
1119 return 0;
1120 }
1121
1122 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1123 {
1124 struct mv643xx_eth_shared_private *msp = bus->priv;
1125 void __iomem *smi_reg = msp->base + SMI_REG;
1126 int ret;
1127
1128 if (smi_wait_ready(msp)) {
1129 pr_warn("SMI bus busy timeout\n");
1130 return -ETIMEDOUT;
1131 }
1132
1133 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
1134
1135 if (smi_wait_ready(msp)) {
1136 pr_warn("SMI bus busy timeout\n");
1137 return -ETIMEDOUT;
1138 }
1139
1140 ret = readl(smi_reg);
1141 if (!(ret & SMI_READ_VALID)) {
1142 pr_warn("SMI bus read not valid\n");
1143 return -ENODEV;
1144 }
1145
1146 return ret & 0xffff;
1147 }
1148
1149 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1150 {
1151 struct mv643xx_eth_shared_private *msp = bus->priv;
1152 void __iomem *smi_reg = msp->base + SMI_REG;
1153
1154 if (smi_wait_ready(msp)) {
1155 pr_warn("SMI bus busy timeout\n");
1156 return -ETIMEDOUT;
1157 }
1158
1159 writel(SMI_OPCODE_WRITE | (reg << 21) |
1160 (addr << 16) | (val & 0xffff), smi_reg);
1161
1162 if (smi_wait_ready(msp)) {
1163 pr_warn("SMI bus busy timeout\n");
1164 return -ETIMEDOUT;
1165 }
1166
1167 return 0;
1168 }
1169
1170
1171 /* statistics ***************************************************************/
1172 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1173 {
1174 struct mv643xx_eth_private *mp = netdev_priv(dev);
1175 struct net_device_stats *stats = &dev->stats;
1176 unsigned long tx_packets = 0;
1177 unsigned long tx_bytes = 0;
1178 unsigned long tx_dropped = 0;
1179 int i;
1180
1181 for (i = 0; i < mp->txq_count; i++) {
1182 struct tx_queue *txq = mp->txq + i;
1183
1184 tx_packets += txq->tx_packets;
1185 tx_bytes += txq->tx_bytes;
1186 tx_dropped += txq->tx_dropped;
1187 }
1188
1189 stats->tx_packets = tx_packets;
1190 stats->tx_bytes = tx_bytes;
1191 stats->tx_dropped = tx_dropped;
1192
1193 return stats;
1194 }
1195
1196 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1197 {
1198 u32 lro_aggregated = 0;
1199 u32 lro_flushed = 0;
1200 u32 lro_no_desc = 0;
1201 int i;
1202
1203 for (i = 0; i < mp->rxq_count; i++) {
1204 struct rx_queue *rxq = mp->rxq + i;
1205
1206 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1207 lro_flushed += rxq->lro_mgr.stats.flushed;
1208 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1209 }
1210
1211 mp->lro_counters.lro_aggregated = lro_aggregated;
1212 mp->lro_counters.lro_flushed = lro_flushed;
1213 mp->lro_counters.lro_no_desc = lro_no_desc;
1214 }
1215
1216 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1217 {
1218 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1219 }
1220
1221 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1222 {
1223 int i;
1224
1225 for (i = 0; i < 0x80; i += 4)
1226 mib_read(mp, i);
1227 }
1228
1229 static void mib_counters_update(struct mv643xx_eth_private *mp)
1230 {
1231 struct mib_counters *p = &mp->mib_counters;
1232
1233 spin_lock_bh(&mp->mib_counters_lock);
1234 p->good_octets_received += mib_read(mp, 0x00);
1235 p->bad_octets_received += mib_read(mp, 0x08);
1236 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1237 p->good_frames_received += mib_read(mp, 0x10);
1238 p->bad_frames_received += mib_read(mp, 0x14);
1239 p->broadcast_frames_received += mib_read(mp, 0x18);
1240 p->multicast_frames_received += mib_read(mp, 0x1c);
1241 p->frames_64_octets += mib_read(mp, 0x20);
1242 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1243 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1244 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1245 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1246 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1247 p->good_octets_sent += mib_read(mp, 0x38);
1248 p->good_frames_sent += mib_read(mp, 0x40);
1249 p->excessive_collision += mib_read(mp, 0x44);
1250 p->multicast_frames_sent += mib_read(mp, 0x48);
1251 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1252 p->unrec_mac_control_received += mib_read(mp, 0x50);
1253 p->fc_sent += mib_read(mp, 0x54);
1254 p->good_fc_received += mib_read(mp, 0x58);
1255 p->bad_fc_received += mib_read(mp, 0x5c);
1256 p->undersize_received += mib_read(mp, 0x60);
1257 p->fragments_received += mib_read(mp, 0x64);
1258 p->oversize_received += mib_read(mp, 0x68);
1259 p->jabber_received += mib_read(mp, 0x6c);
1260 p->mac_receive_error += mib_read(mp, 0x70);
1261 p->bad_crc_event += mib_read(mp, 0x74);
1262 p->collision += mib_read(mp, 0x78);
1263 p->late_collision += mib_read(mp, 0x7c);
1264 spin_unlock_bh(&mp->mib_counters_lock);
1265
1266 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1267 }
1268
1269 static void mib_counters_timer_wrapper(unsigned long _mp)
1270 {
1271 struct mv643xx_eth_private *mp = (void *)_mp;
1272
1273 mib_counters_update(mp);
1274 }
1275
1276
1277 /* interrupt coalescing *****************************************************/
1278 /*
1279 * Hardware coalescing parameters are set in units of 64 t_clk
1280 * cycles. I.e.:
1281 *
1282 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1283 *
1284 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1285 *
1286 * In the ->set*() methods, we round the computed register value
1287 * to the nearest integer.
1288 */
1289 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1290 {
1291 u32 val = rdlp(mp, SDMA_CONFIG);
1292 u64 temp;
1293
1294 if (mp->shared->extended_rx_coal_limit)
1295 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1296 else
1297 temp = (val & 0x003fff00) >> 8;
1298
1299 temp *= 64000000;
1300 do_div(temp, mp->shared->t_clk);
1301
1302 return (unsigned int)temp;
1303 }
1304
1305 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1306 {
1307 u64 temp;
1308 u32 val;
1309
1310 temp = (u64)usec * mp->shared->t_clk;
1311 temp += 31999999;
1312 do_div(temp, 64000000);
1313
1314 val = rdlp(mp, SDMA_CONFIG);
1315 if (mp->shared->extended_rx_coal_limit) {
1316 if (temp > 0xffff)
1317 temp = 0xffff;
1318 val &= ~0x023fff80;
1319 val |= (temp & 0x8000) << 10;
1320 val |= (temp & 0x7fff) << 7;
1321 } else {
1322 if (temp > 0x3fff)
1323 temp = 0x3fff;
1324 val &= ~0x003fff00;
1325 val |= (temp & 0x3fff) << 8;
1326 }
1327 wrlp(mp, SDMA_CONFIG, val);
1328 }
1329
1330 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1331 {
1332 u64 temp;
1333
1334 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1335 temp *= 64000000;
1336 do_div(temp, mp->shared->t_clk);
1337
1338 return (unsigned int)temp;
1339 }
1340
1341 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1342 {
1343 u64 temp;
1344
1345 temp = (u64)usec * mp->shared->t_clk;
1346 temp += 31999999;
1347 do_div(temp, 64000000);
1348
1349 if (temp > 0x3fff)
1350 temp = 0x3fff;
1351
1352 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1353 }
1354
1355
1356 /* ethtool ******************************************************************/
1357 struct mv643xx_eth_stats {
1358 char stat_string[ETH_GSTRING_LEN];
1359 int sizeof_stat;
1360 int netdev_off;
1361 int mp_off;
1362 };
1363
1364 #define SSTAT(m) \
1365 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1366 offsetof(struct net_device, stats.m), -1 }
1367
1368 #define MIBSTAT(m) \
1369 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1370 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1371
1372 #define LROSTAT(m) \
1373 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1374 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1375
1376 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1377 SSTAT(rx_packets),
1378 SSTAT(tx_packets),
1379 SSTAT(rx_bytes),
1380 SSTAT(tx_bytes),
1381 SSTAT(rx_errors),
1382 SSTAT(tx_errors),
1383 SSTAT(rx_dropped),
1384 SSTAT(tx_dropped),
1385 MIBSTAT(good_octets_received),
1386 MIBSTAT(bad_octets_received),
1387 MIBSTAT(internal_mac_transmit_err),
1388 MIBSTAT(good_frames_received),
1389 MIBSTAT(bad_frames_received),
1390 MIBSTAT(broadcast_frames_received),
1391 MIBSTAT(multicast_frames_received),
1392 MIBSTAT(frames_64_octets),
1393 MIBSTAT(frames_65_to_127_octets),
1394 MIBSTAT(frames_128_to_255_octets),
1395 MIBSTAT(frames_256_to_511_octets),
1396 MIBSTAT(frames_512_to_1023_octets),
1397 MIBSTAT(frames_1024_to_max_octets),
1398 MIBSTAT(good_octets_sent),
1399 MIBSTAT(good_frames_sent),
1400 MIBSTAT(excessive_collision),
1401 MIBSTAT(multicast_frames_sent),
1402 MIBSTAT(broadcast_frames_sent),
1403 MIBSTAT(unrec_mac_control_received),
1404 MIBSTAT(fc_sent),
1405 MIBSTAT(good_fc_received),
1406 MIBSTAT(bad_fc_received),
1407 MIBSTAT(undersize_received),
1408 MIBSTAT(fragments_received),
1409 MIBSTAT(oversize_received),
1410 MIBSTAT(jabber_received),
1411 MIBSTAT(mac_receive_error),
1412 MIBSTAT(bad_crc_event),
1413 MIBSTAT(collision),
1414 MIBSTAT(late_collision),
1415 LROSTAT(lro_aggregated),
1416 LROSTAT(lro_flushed),
1417 LROSTAT(lro_no_desc),
1418 };
1419
1420 static int
1421 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1422 struct ethtool_cmd *cmd)
1423 {
1424 int err;
1425
1426 err = phy_read_status(mp->phy);
1427 if (err == 0)
1428 err = phy_ethtool_gset(mp->phy, cmd);
1429
1430 /*
1431 * The MAC does not support 1000baseT_Half.
1432 */
1433 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1434 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1435
1436 return err;
1437 }
1438
1439 static int
1440 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1441 struct ethtool_cmd *cmd)
1442 {
1443 u32 port_status;
1444
1445 port_status = rdlp(mp, PORT_STATUS);
1446
1447 cmd->supported = SUPPORTED_MII;
1448 cmd->advertising = ADVERTISED_MII;
1449 switch (port_status & PORT_SPEED_MASK) {
1450 case PORT_SPEED_10:
1451 ethtool_cmd_speed_set(cmd, SPEED_10);
1452 break;
1453 case PORT_SPEED_100:
1454 ethtool_cmd_speed_set(cmd, SPEED_100);
1455 break;
1456 case PORT_SPEED_1000:
1457 ethtool_cmd_speed_set(cmd, SPEED_1000);
1458 break;
1459 default:
1460 cmd->speed = -1;
1461 break;
1462 }
1463 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1464 cmd->port = PORT_MII;
1465 cmd->phy_address = 0;
1466 cmd->transceiver = XCVR_INTERNAL;
1467 cmd->autoneg = AUTONEG_DISABLE;
1468 cmd->maxtxpkt = 1;
1469 cmd->maxrxpkt = 1;
1470
1471 return 0;
1472 }
1473
1474 static int
1475 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1476 {
1477 struct mv643xx_eth_private *mp = netdev_priv(dev);
1478
1479 if (mp->phy != NULL)
1480 return mv643xx_eth_get_settings_phy(mp, cmd);
1481 else
1482 return mv643xx_eth_get_settings_phyless(mp, cmd);
1483 }
1484
1485 static int
1486 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1487 {
1488 struct mv643xx_eth_private *mp = netdev_priv(dev);
1489
1490 if (mp->phy == NULL)
1491 return -EINVAL;
1492
1493 /*
1494 * The MAC does not support 1000baseT_Half.
1495 */
1496 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1497
1498 return phy_ethtool_sset(mp->phy, cmd);
1499 }
1500
1501 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1502 struct ethtool_drvinfo *drvinfo)
1503 {
1504 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1505 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1506 strncpy(drvinfo->fw_version, "N/A", 32);
1507 strncpy(drvinfo->bus_info, "platform", 32);
1508 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1509 }
1510
1511 static int mv643xx_eth_nway_reset(struct net_device *dev)
1512 {
1513 struct mv643xx_eth_private *mp = netdev_priv(dev);
1514
1515 if (mp->phy == NULL)
1516 return -EINVAL;
1517
1518 return genphy_restart_aneg(mp->phy);
1519 }
1520
1521 static int
1522 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1523 {
1524 struct mv643xx_eth_private *mp = netdev_priv(dev);
1525
1526 ec->rx_coalesce_usecs = get_rx_coal(mp);
1527 ec->tx_coalesce_usecs = get_tx_coal(mp);
1528
1529 return 0;
1530 }
1531
1532 static int
1533 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1534 {
1535 struct mv643xx_eth_private *mp = netdev_priv(dev);
1536
1537 set_rx_coal(mp, ec->rx_coalesce_usecs);
1538 set_tx_coal(mp, ec->tx_coalesce_usecs);
1539
1540 return 0;
1541 }
1542
1543 static void
1544 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1545 {
1546 struct mv643xx_eth_private *mp = netdev_priv(dev);
1547
1548 er->rx_max_pending = 4096;
1549 er->tx_max_pending = 4096;
1550 er->rx_mini_max_pending = 0;
1551 er->rx_jumbo_max_pending = 0;
1552
1553 er->rx_pending = mp->rx_ring_size;
1554 er->tx_pending = mp->tx_ring_size;
1555 er->rx_mini_pending = 0;
1556 er->rx_jumbo_pending = 0;
1557 }
1558
1559 static int
1560 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1561 {
1562 struct mv643xx_eth_private *mp = netdev_priv(dev);
1563
1564 if (er->rx_mini_pending || er->rx_jumbo_pending)
1565 return -EINVAL;
1566
1567 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1568 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1569
1570 if (netif_running(dev)) {
1571 mv643xx_eth_stop(dev);
1572 if (mv643xx_eth_open(dev)) {
1573 netdev_err(dev,
1574 "fatal error on re-opening device after ring param change\n");
1575 return -ENOMEM;
1576 }
1577 }
1578
1579 return 0;
1580 }
1581
1582
1583 static int
1584 mv643xx_eth_set_features(struct net_device *dev, u32 features)
1585 {
1586 struct mv643xx_eth_private *mp = netdev_priv(dev);
1587 u32 rx_csum = features & NETIF_F_RXCSUM;
1588
1589 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1590
1591 return 0;
1592 }
1593
1594 static void mv643xx_eth_get_strings(struct net_device *dev,
1595 uint32_t stringset, uint8_t *data)
1596 {
1597 int i;
1598
1599 if (stringset == ETH_SS_STATS) {
1600 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1601 memcpy(data + i * ETH_GSTRING_LEN,
1602 mv643xx_eth_stats[i].stat_string,
1603 ETH_GSTRING_LEN);
1604 }
1605 }
1606 }
1607
1608 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1609 struct ethtool_stats *stats,
1610 uint64_t *data)
1611 {
1612 struct mv643xx_eth_private *mp = netdev_priv(dev);
1613 int i;
1614
1615 mv643xx_eth_get_stats(dev);
1616 mib_counters_update(mp);
1617 mv643xx_eth_grab_lro_stats(mp);
1618
1619 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1620 const struct mv643xx_eth_stats *stat;
1621 void *p;
1622
1623 stat = mv643xx_eth_stats + i;
1624
1625 if (stat->netdev_off >= 0)
1626 p = ((void *)mp->dev) + stat->netdev_off;
1627 else
1628 p = ((void *)mp) + stat->mp_off;
1629
1630 data[i] = (stat->sizeof_stat == 8) ?
1631 *(uint64_t *)p : *(uint32_t *)p;
1632 }
1633 }
1634
1635 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1636 {
1637 if (sset == ETH_SS_STATS)
1638 return ARRAY_SIZE(mv643xx_eth_stats);
1639
1640 return -EOPNOTSUPP;
1641 }
1642
1643 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1644 .get_settings = mv643xx_eth_get_settings,
1645 .set_settings = mv643xx_eth_set_settings,
1646 .get_drvinfo = mv643xx_eth_get_drvinfo,
1647 .nway_reset = mv643xx_eth_nway_reset,
1648 .get_link = ethtool_op_get_link,
1649 .get_coalesce = mv643xx_eth_get_coalesce,
1650 .set_coalesce = mv643xx_eth_set_coalesce,
1651 .get_ringparam = mv643xx_eth_get_ringparam,
1652 .set_ringparam = mv643xx_eth_set_ringparam,
1653 .get_strings = mv643xx_eth_get_strings,
1654 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1655 .get_sset_count = mv643xx_eth_get_sset_count,
1656 };
1657
1658
1659 /* address handling *********************************************************/
1660 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1661 {
1662 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1663 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1664
1665 addr[0] = (mac_h >> 24) & 0xff;
1666 addr[1] = (mac_h >> 16) & 0xff;
1667 addr[2] = (mac_h >> 8) & 0xff;
1668 addr[3] = mac_h & 0xff;
1669 addr[4] = (mac_l >> 8) & 0xff;
1670 addr[5] = mac_l & 0xff;
1671 }
1672
1673 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1674 {
1675 wrlp(mp, MAC_ADDR_HIGH,
1676 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1677 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1678 }
1679
1680 static u32 uc_addr_filter_mask(struct net_device *dev)
1681 {
1682 struct netdev_hw_addr *ha;
1683 u32 nibbles;
1684
1685 if (dev->flags & IFF_PROMISC)
1686 return 0;
1687
1688 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1689 netdev_for_each_uc_addr(ha, dev) {
1690 if (memcmp(dev->dev_addr, ha->addr, 5))
1691 return 0;
1692 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1693 return 0;
1694
1695 nibbles |= 1 << (ha->addr[5] & 0x0f);
1696 }
1697
1698 return nibbles;
1699 }
1700
1701 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1702 {
1703 struct mv643xx_eth_private *mp = netdev_priv(dev);
1704 u32 port_config;
1705 u32 nibbles;
1706 int i;
1707
1708 uc_addr_set(mp, dev->dev_addr);
1709
1710 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1711
1712 nibbles = uc_addr_filter_mask(dev);
1713 if (!nibbles) {
1714 port_config |= UNICAST_PROMISCUOUS_MODE;
1715 nibbles = 0xffff;
1716 }
1717
1718 for (i = 0; i < 16; i += 4) {
1719 int off = UNICAST_TABLE(mp->port_num) + i;
1720 u32 v;
1721
1722 v = 0;
1723 if (nibbles & 1)
1724 v |= 0x00000001;
1725 if (nibbles & 2)
1726 v |= 0x00000100;
1727 if (nibbles & 4)
1728 v |= 0x00010000;
1729 if (nibbles & 8)
1730 v |= 0x01000000;
1731 nibbles >>= 4;
1732
1733 wrl(mp, off, v);
1734 }
1735
1736 wrlp(mp, PORT_CONFIG, port_config);
1737 }
1738
1739 static int addr_crc(unsigned char *addr)
1740 {
1741 int crc = 0;
1742 int i;
1743
1744 for (i = 0; i < 6; i++) {
1745 int j;
1746
1747 crc = (crc ^ addr[i]) << 8;
1748 for (j = 7; j >= 0; j--) {
1749 if (crc & (0x100 << j))
1750 crc ^= 0x107 << j;
1751 }
1752 }
1753
1754 return crc;
1755 }
1756
1757 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1758 {
1759 struct mv643xx_eth_private *mp = netdev_priv(dev);
1760 u32 *mc_spec;
1761 u32 *mc_other;
1762 struct netdev_hw_addr *ha;
1763 int i;
1764
1765 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1766 int port_num;
1767 u32 accept;
1768
1769 oom:
1770 port_num = mp->port_num;
1771 accept = 0x01010101;
1772 for (i = 0; i < 0x100; i += 4) {
1773 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1774 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1775 }
1776 return;
1777 }
1778
1779 mc_spec = kmalloc(0x200, GFP_ATOMIC);
1780 if (mc_spec == NULL)
1781 goto oom;
1782 mc_other = mc_spec + (0x100 >> 2);
1783
1784 memset(mc_spec, 0, 0x100);
1785 memset(mc_other, 0, 0x100);
1786
1787 netdev_for_each_mc_addr(ha, dev) {
1788 u8 *a = ha->addr;
1789 u32 *table;
1790 int entry;
1791
1792 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1793 table = mc_spec;
1794 entry = a[5];
1795 } else {
1796 table = mc_other;
1797 entry = addr_crc(a);
1798 }
1799
1800 table[entry >> 2] |= 1 << (8 * (entry & 3));
1801 }
1802
1803 for (i = 0; i < 0x100; i += 4) {
1804 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]);
1805 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]);
1806 }
1807
1808 kfree(mc_spec);
1809 }
1810
1811 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1812 {
1813 mv643xx_eth_program_unicast_filter(dev);
1814 mv643xx_eth_program_multicast_filter(dev);
1815 }
1816
1817 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1818 {
1819 struct sockaddr *sa = addr;
1820
1821 if (!is_valid_ether_addr(sa->sa_data))
1822 return -EINVAL;
1823
1824 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1825
1826 netif_addr_lock_bh(dev);
1827 mv643xx_eth_program_unicast_filter(dev);
1828 netif_addr_unlock_bh(dev);
1829
1830 return 0;
1831 }
1832
1833
1834 /* rx/tx queue initialisation ***********************************************/
1835 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1836 {
1837 struct rx_queue *rxq = mp->rxq + index;
1838 struct rx_desc *rx_desc;
1839 int size;
1840 int i;
1841
1842 rxq->index = index;
1843
1844 rxq->rx_ring_size = mp->rx_ring_size;
1845
1846 rxq->rx_desc_count = 0;
1847 rxq->rx_curr_desc = 0;
1848 rxq->rx_used_desc = 0;
1849
1850 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1851
1852 if (index == 0 && size <= mp->rx_desc_sram_size) {
1853 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1854 mp->rx_desc_sram_size);
1855 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1856 } else {
1857 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1858 size, &rxq->rx_desc_dma,
1859 GFP_KERNEL);
1860 }
1861
1862 if (rxq->rx_desc_area == NULL) {
1863 netdev_err(mp->dev,
1864 "can't allocate rx ring (%d bytes)\n", size);
1865 goto out;
1866 }
1867 memset(rxq->rx_desc_area, 0, size);
1868
1869 rxq->rx_desc_area_size = size;
1870 rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1871 GFP_KERNEL);
1872 if (rxq->rx_skb == NULL) {
1873 netdev_err(mp->dev, "can't allocate rx skb ring\n");
1874 goto out_free;
1875 }
1876
1877 rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1878 for (i = 0; i < rxq->rx_ring_size; i++) {
1879 int nexti;
1880
1881 nexti = i + 1;
1882 if (nexti == rxq->rx_ring_size)
1883 nexti = 0;
1884
1885 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1886 nexti * sizeof(struct rx_desc);
1887 }
1888
1889 rxq->lro_mgr.dev = mp->dev;
1890 memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats));
1891 rxq->lro_mgr.features = LRO_F_NAPI;
1892 rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1893 rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1894 rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr);
1895 rxq->lro_mgr.max_aggr = 32;
1896 rxq->lro_mgr.frag_align_pad = 0;
1897 rxq->lro_mgr.lro_arr = rxq->lro_arr;
1898 rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header;
1899
1900 memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr));
1901
1902 return 0;
1903
1904
1905 out_free:
1906 if (index == 0 && size <= mp->rx_desc_sram_size)
1907 iounmap(rxq->rx_desc_area);
1908 else
1909 dma_free_coherent(mp->dev->dev.parent, size,
1910 rxq->rx_desc_area,
1911 rxq->rx_desc_dma);
1912
1913 out:
1914 return -ENOMEM;
1915 }
1916
1917 static void rxq_deinit(struct rx_queue *rxq)
1918 {
1919 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1920 int i;
1921
1922 rxq_disable(rxq);
1923
1924 for (i = 0; i < rxq->rx_ring_size; i++) {
1925 if (rxq->rx_skb[i]) {
1926 dev_kfree_skb(rxq->rx_skb[i]);
1927 rxq->rx_desc_count--;
1928 }
1929 }
1930
1931 if (rxq->rx_desc_count) {
1932 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n",
1933 rxq->rx_desc_count);
1934 }
1935
1936 if (rxq->index == 0 &&
1937 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1938 iounmap(rxq->rx_desc_area);
1939 else
1940 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
1941 rxq->rx_desc_area, rxq->rx_desc_dma);
1942
1943 kfree(rxq->rx_skb);
1944 }
1945
1946 static int txq_init(struct mv643xx_eth_private *mp, int index)
1947 {
1948 struct tx_queue *txq = mp->txq + index;
1949 struct tx_desc *tx_desc;
1950 int size;
1951 int i;
1952
1953 txq->index = index;
1954
1955 txq->tx_ring_size = mp->tx_ring_size;
1956
1957 txq->tx_desc_count = 0;
1958 txq->tx_curr_desc = 0;
1959 txq->tx_used_desc = 0;
1960
1961 size = txq->tx_ring_size * sizeof(struct tx_desc);
1962
1963 if (index == 0 && size <= mp->tx_desc_sram_size) {
1964 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
1965 mp->tx_desc_sram_size);
1966 txq->tx_desc_dma = mp->tx_desc_sram_addr;
1967 } else {
1968 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1969 size, &txq->tx_desc_dma,
1970 GFP_KERNEL);
1971 }
1972
1973 if (txq->tx_desc_area == NULL) {
1974 netdev_err(mp->dev,
1975 "can't allocate tx ring (%d bytes)\n", size);
1976 return -ENOMEM;
1977 }
1978 memset(txq->tx_desc_area, 0, size);
1979
1980 txq->tx_desc_area_size = size;
1981
1982 tx_desc = (struct tx_desc *)txq->tx_desc_area;
1983 for (i = 0; i < txq->tx_ring_size; i++) {
1984 struct tx_desc *txd = tx_desc + i;
1985 int nexti;
1986
1987 nexti = i + 1;
1988 if (nexti == txq->tx_ring_size)
1989 nexti = 0;
1990
1991 txd->cmd_sts = 0;
1992 txd->next_desc_ptr = txq->tx_desc_dma +
1993 nexti * sizeof(struct tx_desc);
1994 }
1995
1996 skb_queue_head_init(&txq->tx_skb);
1997
1998 return 0;
1999 }
2000
2001 static void txq_deinit(struct tx_queue *txq)
2002 {
2003 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2004
2005 txq_disable(txq);
2006 txq_reclaim(txq, txq->tx_ring_size, 1);
2007
2008 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2009
2010 if (txq->index == 0 &&
2011 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2012 iounmap(txq->tx_desc_area);
2013 else
2014 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2015 txq->tx_desc_area, txq->tx_desc_dma);
2016 }
2017
2018
2019 /* netdev ops and related ***************************************************/
2020 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2021 {
2022 u32 int_cause;
2023 u32 int_cause_ext;
2024
2025 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
2026 if (int_cause == 0)
2027 return 0;
2028
2029 int_cause_ext = 0;
2030 if (int_cause & INT_EXT) {
2031 int_cause &= ~INT_EXT;
2032 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2033 }
2034
2035 if (int_cause) {
2036 wrlp(mp, INT_CAUSE, ~int_cause);
2037 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2038 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2039 mp->work_rx |= (int_cause & INT_RX) >> 2;
2040 }
2041
2042 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2043 if (int_cause_ext) {
2044 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2045 if (int_cause_ext & INT_EXT_LINK_PHY)
2046 mp->work_link = 1;
2047 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2048 }
2049
2050 return 1;
2051 }
2052
2053 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2054 {
2055 struct net_device *dev = (struct net_device *)dev_id;
2056 struct mv643xx_eth_private *mp = netdev_priv(dev);
2057
2058 if (unlikely(!mv643xx_eth_collect_events(mp)))
2059 return IRQ_NONE;
2060
2061 wrlp(mp, INT_MASK, 0);
2062 napi_schedule(&mp->napi);
2063
2064 return IRQ_HANDLED;
2065 }
2066
2067 static void handle_link_event(struct mv643xx_eth_private *mp)
2068 {
2069 struct net_device *dev = mp->dev;
2070 u32 port_status;
2071 int speed;
2072 int duplex;
2073 int fc;
2074
2075 port_status = rdlp(mp, PORT_STATUS);
2076 if (!(port_status & LINK_UP)) {
2077 if (netif_carrier_ok(dev)) {
2078 int i;
2079
2080 netdev_info(dev, "link down\n");
2081
2082 netif_carrier_off(dev);
2083
2084 for (i = 0; i < mp->txq_count; i++) {
2085 struct tx_queue *txq = mp->txq + i;
2086
2087 txq_reclaim(txq, txq->tx_ring_size, 1);
2088 txq_reset_hw_ptr(txq);
2089 }
2090 }
2091 return;
2092 }
2093
2094 switch (port_status & PORT_SPEED_MASK) {
2095 case PORT_SPEED_10:
2096 speed = 10;
2097 break;
2098 case PORT_SPEED_100:
2099 speed = 100;
2100 break;
2101 case PORT_SPEED_1000:
2102 speed = 1000;
2103 break;
2104 default:
2105 speed = -1;
2106 break;
2107 }
2108 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2109 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2110
2111 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n",
2112 speed, duplex ? "full" : "half", fc ? "en" : "dis");
2113
2114 if (!netif_carrier_ok(dev))
2115 netif_carrier_on(dev);
2116 }
2117
2118 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2119 {
2120 struct mv643xx_eth_private *mp;
2121 int work_done;
2122
2123 mp = container_of(napi, struct mv643xx_eth_private, napi);
2124
2125 if (unlikely(mp->oom)) {
2126 mp->oom = 0;
2127 del_timer(&mp->rx_oom);
2128 }
2129
2130 work_done = 0;
2131 while (work_done < budget) {
2132 u8 queue_mask;
2133 int queue;
2134 int work_tbd;
2135
2136 if (mp->work_link) {
2137 mp->work_link = 0;
2138 handle_link_event(mp);
2139 work_done++;
2140 continue;
2141 }
2142
2143 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2144 if (likely(!mp->oom))
2145 queue_mask |= mp->work_rx_refill;
2146
2147 if (!queue_mask) {
2148 if (mv643xx_eth_collect_events(mp))
2149 continue;
2150 break;
2151 }
2152
2153 queue = fls(queue_mask) - 1;
2154 queue_mask = 1 << queue;
2155
2156 work_tbd = budget - work_done;
2157 if (work_tbd > 16)
2158 work_tbd = 16;
2159
2160 if (mp->work_tx_end & queue_mask) {
2161 txq_kick(mp->txq + queue);
2162 } else if (mp->work_tx & queue_mask) {
2163 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2164 txq_maybe_wake(mp->txq + queue);
2165 } else if (mp->work_rx & queue_mask) {
2166 work_done += rxq_process(mp->rxq + queue, work_tbd);
2167 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2168 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2169 } else {
2170 BUG();
2171 }
2172 }
2173
2174 if (work_done < budget) {
2175 if (mp->oom)
2176 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2177 napi_complete(napi);
2178 wrlp(mp, INT_MASK, mp->int_mask);
2179 }
2180
2181 return work_done;
2182 }
2183
2184 static inline void oom_timer_wrapper(unsigned long data)
2185 {
2186 struct mv643xx_eth_private *mp = (void *)data;
2187
2188 napi_schedule(&mp->napi);
2189 }
2190
2191 static void phy_reset(struct mv643xx_eth_private *mp)
2192 {
2193 int data;
2194
2195 data = phy_read(mp->phy, MII_BMCR);
2196 if (data < 0)
2197 return;
2198
2199 data |= BMCR_RESET;
2200 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2201 return;
2202
2203 do {
2204 data = phy_read(mp->phy, MII_BMCR);
2205 } while (data >= 0 && data & BMCR_RESET);
2206 }
2207
2208 static void port_start(struct mv643xx_eth_private *mp)
2209 {
2210 u32 pscr;
2211 int i;
2212
2213 /*
2214 * Perform PHY reset, if there is a PHY.
2215 */
2216 if (mp->phy != NULL) {
2217 struct ethtool_cmd cmd;
2218
2219 mv643xx_eth_get_settings(mp->dev, &cmd);
2220 phy_reset(mp);
2221 mv643xx_eth_set_settings(mp->dev, &cmd);
2222 }
2223
2224 /*
2225 * Configure basic link parameters.
2226 */
2227 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2228
2229 pscr |= SERIAL_PORT_ENABLE;
2230 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2231
2232 pscr |= DO_NOT_FORCE_LINK_FAIL;
2233 if (mp->phy == NULL)
2234 pscr |= FORCE_LINK_PASS;
2235 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2236
2237 /*
2238 * Configure TX path and queues.
2239 */
2240 tx_set_rate(mp, 1000000000, 16777216);
2241 for (i = 0; i < mp->txq_count; i++) {
2242 struct tx_queue *txq = mp->txq + i;
2243
2244 txq_reset_hw_ptr(txq);
2245 txq_set_rate(txq, 1000000000, 16777216);
2246 txq_set_fixed_prio_mode(txq);
2247 }
2248
2249 /*
2250 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2251 * frames to RX queue #0, and include the pseudo-header when
2252 * calculating receive checksums.
2253 */
2254 mv643xx_eth_set_features(mp->dev, mp->dev->features);
2255
2256 /*
2257 * Treat BPDUs as normal multicasts, and disable partition mode.
2258 */
2259 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2260
2261 /*
2262 * Add configured unicast addresses to address filter table.
2263 */
2264 mv643xx_eth_program_unicast_filter(mp->dev);
2265
2266 /*
2267 * Enable the receive queues.
2268 */
2269 for (i = 0; i < mp->rxq_count; i++) {
2270 struct rx_queue *rxq = mp->rxq + i;
2271 u32 addr;
2272
2273 addr = (u32)rxq->rx_desc_dma;
2274 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2275 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2276
2277 rxq_enable(rxq);
2278 }
2279 }
2280
2281 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2282 {
2283 int skb_size;
2284
2285 /*
2286 * Reserve 2+14 bytes for an ethernet header (the hardware
2287 * automatically prepends 2 bytes of dummy data to each
2288 * received packet), 16 bytes for up to four VLAN tags, and
2289 * 4 bytes for the trailing FCS -- 36 bytes total.
2290 */
2291 skb_size = mp->dev->mtu + 36;
2292
2293 /*
2294 * Make sure that the skb size is a multiple of 8 bytes, as
2295 * the lower three bits of the receive descriptor's buffer
2296 * size field are ignored by the hardware.
2297 */
2298 mp->skb_size = (skb_size + 7) & ~7;
2299
2300 /*
2301 * If NET_SKB_PAD is smaller than a cache line,
2302 * netdev_alloc_skb() will cause skb->data to be misaligned
2303 * to a cache line boundary. If this is the case, include
2304 * some extra space to allow re-aligning the data area.
2305 */
2306 mp->skb_size += SKB_DMA_REALIGN;
2307 }
2308
2309 static int mv643xx_eth_open(struct net_device *dev)
2310 {
2311 struct mv643xx_eth_private *mp = netdev_priv(dev);
2312 int err;
2313 int i;
2314
2315 wrlp(mp, INT_CAUSE, 0);
2316 wrlp(mp, INT_CAUSE_EXT, 0);
2317 rdlp(mp, INT_CAUSE_EXT);
2318
2319 err = request_irq(dev->irq, mv643xx_eth_irq,
2320 IRQF_SHARED, dev->name, dev);
2321 if (err) {
2322 netdev_err(dev, "can't assign irq\n");
2323 return -EAGAIN;
2324 }
2325
2326 mv643xx_eth_recalc_skb_size(mp);
2327
2328 napi_enable(&mp->napi);
2329
2330 skb_queue_head_init(&mp->rx_recycle);
2331
2332 mp->int_mask = INT_EXT;
2333
2334 for (i = 0; i < mp->rxq_count; i++) {
2335 err = rxq_init(mp, i);
2336 if (err) {
2337 while (--i >= 0)
2338 rxq_deinit(mp->rxq + i);
2339 goto out;
2340 }
2341
2342 rxq_refill(mp->rxq + i, INT_MAX);
2343 mp->int_mask |= INT_RX_0 << i;
2344 }
2345
2346 if (mp->oom) {
2347 mp->rx_oom.expires = jiffies + (HZ / 10);
2348 add_timer(&mp->rx_oom);
2349 }
2350
2351 for (i = 0; i < mp->txq_count; i++) {
2352 err = txq_init(mp, i);
2353 if (err) {
2354 while (--i >= 0)
2355 txq_deinit(mp->txq + i);
2356 goto out_free;
2357 }
2358 mp->int_mask |= INT_TX_END_0 << i;
2359 }
2360
2361 port_start(mp);
2362
2363 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2364 wrlp(mp, INT_MASK, mp->int_mask);
2365
2366 return 0;
2367
2368
2369 out_free:
2370 for (i = 0; i < mp->rxq_count; i++)
2371 rxq_deinit(mp->rxq + i);
2372 out:
2373 free_irq(dev->irq, dev);
2374
2375 return err;
2376 }
2377
2378 static void port_reset(struct mv643xx_eth_private *mp)
2379 {
2380 unsigned int data;
2381 int i;
2382
2383 for (i = 0; i < mp->rxq_count; i++)
2384 rxq_disable(mp->rxq + i);
2385 for (i = 0; i < mp->txq_count; i++)
2386 txq_disable(mp->txq + i);
2387
2388 while (1) {
2389 u32 ps = rdlp(mp, PORT_STATUS);
2390
2391 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2392 break;
2393 udelay(10);
2394 }
2395
2396 /* Reset the Enable bit in the Configuration Register */
2397 data = rdlp(mp, PORT_SERIAL_CONTROL);
2398 data &= ~(SERIAL_PORT_ENABLE |
2399 DO_NOT_FORCE_LINK_FAIL |
2400 FORCE_LINK_PASS);
2401 wrlp(mp, PORT_SERIAL_CONTROL, data);
2402 }
2403
2404 static int mv643xx_eth_stop(struct net_device *dev)
2405 {
2406 struct mv643xx_eth_private *mp = netdev_priv(dev);
2407 int i;
2408
2409 wrlp(mp, INT_MASK_EXT, 0x00000000);
2410 wrlp(mp, INT_MASK, 0x00000000);
2411 rdlp(mp, INT_MASK);
2412
2413 napi_disable(&mp->napi);
2414
2415 del_timer_sync(&mp->rx_oom);
2416
2417 netif_carrier_off(dev);
2418
2419 free_irq(dev->irq, dev);
2420
2421 port_reset(mp);
2422 mv643xx_eth_get_stats(dev);
2423 mib_counters_update(mp);
2424 del_timer_sync(&mp->mib_counters_timer);
2425
2426 skb_queue_purge(&mp->rx_recycle);
2427
2428 for (i = 0; i < mp->rxq_count; i++)
2429 rxq_deinit(mp->rxq + i);
2430 for (i = 0; i < mp->txq_count; i++)
2431 txq_deinit(mp->txq + i);
2432
2433 return 0;
2434 }
2435
2436 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2437 {
2438 struct mv643xx_eth_private *mp = netdev_priv(dev);
2439
2440 if (mp->phy != NULL)
2441 return phy_mii_ioctl(mp->phy, ifr, cmd);
2442
2443 return -EOPNOTSUPP;
2444 }
2445
2446 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2447 {
2448 struct mv643xx_eth_private *mp = netdev_priv(dev);
2449
2450 if (new_mtu < 64 || new_mtu > 9500)
2451 return -EINVAL;
2452
2453 dev->mtu = new_mtu;
2454 mv643xx_eth_recalc_skb_size(mp);
2455 tx_set_rate(mp, 1000000000, 16777216);
2456
2457 if (!netif_running(dev))
2458 return 0;
2459
2460 /*
2461 * Stop and then re-open the interface. This will allocate RX
2462 * skbs of the new MTU.
2463 * There is a possible danger that the open will not succeed,
2464 * due to memory being full.
2465 */
2466 mv643xx_eth_stop(dev);
2467 if (mv643xx_eth_open(dev)) {
2468 netdev_err(dev,
2469 "fatal error on re-opening device after MTU change\n");
2470 }
2471
2472 return 0;
2473 }
2474
2475 static void tx_timeout_task(struct work_struct *ugly)
2476 {
2477 struct mv643xx_eth_private *mp;
2478
2479 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2480 if (netif_running(mp->dev)) {
2481 netif_tx_stop_all_queues(mp->dev);
2482 port_reset(mp);
2483 port_start(mp);
2484 netif_tx_wake_all_queues(mp->dev);
2485 }
2486 }
2487
2488 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2489 {
2490 struct mv643xx_eth_private *mp = netdev_priv(dev);
2491
2492 netdev_info(dev, "tx timeout\n");
2493
2494 schedule_work(&mp->tx_timeout_task);
2495 }
2496
2497 #ifdef CONFIG_NET_POLL_CONTROLLER
2498 static void mv643xx_eth_netpoll(struct net_device *dev)
2499 {
2500 struct mv643xx_eth_private *mp = netdev_priv(dev);
2501
2502 wrlp(mp, INT_MASK, 0x00000000);
2503 rdlp(mp, INT_MASK);
2504
2505 mv643xx_eth_irq(dev->irq, dev);
2506
2507 wrlp(mp, INT_MASK, mp->int_mask);
2508 }
2509 #endif
2510
2511
2512 /* platform glue ************************************************************/
2513 static void
2514 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2515 struct mbus_dram_target_info *dram)
2516 {
2517 void __iomem *base = msp->base;
2518 u32 win_enable;
2519 u32 win_protect;
2520 int i;
2521
2522 for (i = 0; i < 6; i++) {
2523 writel(0, base + WINDOW_BASE(i));
2524 writel(0, base + WINDOW_SIZE(i));
2525 if (i < 4)
2526 writel(0, base + WINDOW_REMAP_HIGH(i));
2527 }
2528
2529 win_enable = 0x3f;
2530 win_protect = 0;
2531
2532 for (i = 0; i < dram->num_cs; i++) {
2533 struct mbus_dram_window *cs = dram->cs + i;
2534
2535 writel((cs->base & 0xffff0000) |
2536 (cs->mbus_attr << 8) |
2537 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2538 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2539
2540 win_enable &= ~(1 << i);
2541 win_protect |= 3 << (2 * i);
2542 }
2543
2544 writel(win_enable, base + WINDOW_BAR_ENABLE);
2545 msp->win_protect = win_protect;
2546 }
2547
2548 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2549 {
2550 /*
2551 * Check whether we have a 14-bit coal limit field in bits
2552 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2553 * SDMA config register.
2554 */
2555 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2556 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2557 msp->extended_rx_coal_limit = 1;
2558 else
2559 msp->extended_rx_coal_limit = 0;
2560
2561 /*
2562 * Check whether the MAC supports TX rate control, and if
2563 * yes, whether its associated registers are in the old or
2564 * the new place.
2565 */
2566 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2567 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2568 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2569 } else {
2570 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2571 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2572 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2573 else
2574 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2575 }
2576 }
2577
2578 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2579 {
2580 static int mv643xx_eth_version_printed;
2581 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2582 struct mv643xx_eth_shared_private *msp;
2583 struct resource *res;
2584 int ret;
2585
2586 if (!mv643xx_eth_version_printed++)
2587 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n",
2588 mv643xx_eth_driver_version);
2589
2590 ret = -EINVAL;
2591 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2592 if (res == NULL)
2593 goto out;
2594
2595 ret = -ENOMEM;
2596 msp = kzalloc(sizeof(*msp), GFP_KERNEL);
2597 if (msp == NULL)
2598 goto out;
2599
2600 msp->base = ioremap(res->start, resource_size(res));
2601 if (msp->base == NULL)
2602 goto out_free;
2603
2604 /*
2605 * Set up and register SMI bus.
2606 */
2607 if (pd == NULL || pd->shared_smi == NULL) {
2608 msp->smi_bus = mdiobus_alloc();
2609 if (msp->smi_bus == NULL)
2610 goto out_unmap;
2611
2612 msp->smi_bus->priv = msp;
2613 msp->smi_bus->name = "mv643xx_eth smi";
2614 msp->smi_bus->read = smi_bus_read;
2615 msp->smi_bus->write = smi_bus_write,
2616 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2617 msp->smi_bus->parent = &pdev->dev;
2618 msp->smi_bus->phy_mask = 0xffffffff;
2619 if (mdiobus_register(msp->smi_bus) < 0)
2620 goto out_free_mii_bus;
2621 msp->smi = msp;
2622 } else {
2623 msp->smi = platform_get_drvdata(pd->shared_smi);
2624 }
2625
2626 msp->err_interrupt = NO_IRQ;
2627 init_waitqueue_head(&msp->smi_busy_wait);
2628
2629 /*
2630 * Check whether the error interrupt is hooked up.
2631 */
2632 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2633 if (res != NULL) {
2634 int err;
2635
2636 err = request_irq(res->start, mv643xx_eth_err_irq,
2637 IRQF_SHARED, "mv643xx_eth", msp);
2638 if (!err) {
2639 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2640 msp->err_interrupt = res->start;
2641 }
2642 }
2643
2644 /*
2645 * (Re-)program MBUS remapping windows if we are asked to.
2646 */
2647 if (pd != NULL && pd->dram != NULL)
2648 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2649
2650 /*
2651 * Detect hardware parameters.
2652 */
2653 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2654 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
2655 pd->tx_csum_limit : 9 * 1024;
2656 infer_hw_params(msp);
2657
2658 platform_set_drvdata(pdev, msp);
2659
2660 return 0;
2661
2662 out_free_mii_bus:
2663 mdiobus_free(msp->smi_bus);
2664 out_unmap:
2665 iounmap(msp->base);
2666 out_free:
2667 kfree(msp);
2668 out:
2669 return ret;
2670 }
2671
2672 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2673 {
2674 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2675 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2676
2677 if (pd == NULL || pd->shared_smi == NULL) {
2678 mdiobus_unregister(msp->smi_bus);
2679 mdiobus_free(msp->smi_bus);
2680 }
2681 if (msp->err_interrupt != NO_IRQ)
2682 free_irq(msp->err_interrupt, msp);
2683 iounmap(msp->base);
2684 kfree(msp);
2685
2686 return 0;
2687 }
2688
2689 static struct platform_driver mv643xx_eth_shared_driver = {
2690 .probe = mv643xx_eth_shared_probe,
2691 .remove = mv643xx_eth_shared_remove,
2692 .driver = {
2693 .name = MV643XX_ETH_SHARED_NAME,
2694 .owner = THIS_MODULE,
2695 },
2696 };
2697
2698 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2699 {
2700 int addr_shift = 5 * mp->port_num;
2701 u32 data;
2702
2703 data = rdl(mp, PHY_ADDR);
2704 data &= ~(0x1f << addr_shift);
2705 data |= (phy_addr & 0x1f) << addr_shift;
2706 wrl(mp, PHY_ADDR, data);
2707 }
2708
2709 static int phy_addr_get(struct mv643xx_eth_private *mp)
2710 {
2711 unsigned int data;
2712
2713 data = rdl(mp, PHY_ADDR);
2714
2715 return (data >> (5 * mp->port_num)) & 0x1f;
2716 }
2717
2718 static void set_params(struct mv643xx_eth_private *mp,
2719 struct mv643xx_eth_platform_data *pd)
2720 {
2721 struct net_device *dev = mp->dev;
2722
2723 if (is_valid_ether_addr(pd->mac_addr))
2724 memcpy(dev->dev_addr, pd->mac_addr, 6);
2725 else
2726 uc_addr_get(mp, dev->dev_addr);
2727
2728 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2729 if (pd->rx_queue_size)
2730 mp->rx_ring_size = pd->rx_queue_size;
2731 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2732 mp->rx_desc_sram_size = pd->rx_sram_size;
2733
2734 mp->rxq_count = pd->rx_queue_count ? : 1;
2735
2736 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2737 if (pd->tx_queue_size)
2738 mp->tx_ring_size = pd->tx_queue_size;
2739 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2740 mp->tx_desc_sram_size = pd->tx_sram_size;
2741
2742 mp->txq_count = pd->tx_queue_count ? : 1;
2743 }
2744
2745 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2746 int phy_addr)
2747 {
2748 struct mii_bus *bus = mp->shared->smi->smi_bus;
2749 struct phy_device *phydev;
2750 int start;
2751 int num;
2752 int i;
2753
2754 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2755 start = phy_addr_get(mp) & 0x1f;
2756 num = 32;
2757 } else {
2758 start = phy_addr & 0x1f;
2759 num = 1;
2760 }
2761
2762 phydev = NULL;
2763 for (i = 0; i < num; i++) {
2764 int addr = (start + i) & 0x1f;
2765
2766 if (bus->phy_map[addr] == NULL)
2767 mdiobus_scan(bus, addr);
2768
2769 if (phydev == NULL) {
2770 phydev = bus->phy_map[addr];
2771 if (phydev != NULL)
2772 phy_addr_set(mp, addr);
2773 }
2774 }
2775
2776 return phydev;
2777 }
2778
2779 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2780 {
2781 struct phy_device *phy = mp->phy;
2782
2783 phy_reset(mp);
2784
2785 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2786
2787 if (speed == 0) {
2788 phy->autoneg = AUTONEG_ENABLE;
2789 phy->speed = 0;
2790 phy->duplex = 0;
2791 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2792 } else {
2793 phy->autoneg = AUTONEG_DISABLE;
2794 phy->advertising = 0;
2795 phy->speed = speed;
2796 phy->duplex = duplex;
2797 }
2798 phy_start_aneg(phy);
2799 }
2800
2801 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2802 {
2803 u32 pscr;
2804
2805 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2806 if (pscr & SERIAL_PORT_ENABLE) {
2807 pscr &= ~SERIAL_PORT_ENABLE;
2808 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2809 }
2810
2811 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2812 if (mp->phy == NULL) {
2813 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2814 if (speed == SPEED_1000)
2815 pscr |= SET_GMII_SPEED_TO_1000;
2816 else if (speed == SPEED_100)
2817 pscr |= SET_MII_SPEED_TO_100;
2818
2819 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2820
2821 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2822 if (duplex == DUPLEX_FULL)
2823 pscr |= SET_FULL_DUPLEX_MODE;
2824 }
2825
2826 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2827 }
2828
2829 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2830 .ndo_open = mv643xx_eth_open,
2831 .ndo_stop = mv643xx_eth_stop,
2832 .ndo_start_xmit = mv643xx_eth_xmit,
2833 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2834 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2835 .ndo_validate_addr = eth_validate_addr,
2836 .ndo_do_ioctl = mv643xx_eth_ioctl,
2837 .ndo_change_mtu = mv643xx_eth_change_mtu,
2838 .ndo_set_features = mv643xx_eth_set_features,
2839 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2840 .ndo_get_stats = mv643xx_eth_get_stats,
2841 #ifdef CONFIG_NET_POLL_CONTROLLER
2842 .ndo_poll_controller = mv643xx_eth_netpoll,
2843 #endif
2844 };
2845
2846 static int mv643xx_eth_probe(struct platform_device *pdev)
2847 {
2848 struct mv643xx_eth_platform_data *pd;
2849 struct mv643xx_eth_private *mp;
2850 struct net_device *dev;
2851 struct resource *res;
2852 int err;
2853
2854 pd = pdev->dev.platform_data;
2855 if (pd == NULL) {
2856 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n");
2857 return -ENODEV;
2858 }
2859
2860 if (pd->shared == NULL) {
2861 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n");
2862 return -ENODEV;
2863 }
2864
2865 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2866 if (!dev)
2867 return -ENOMEM;
2868
2869 mp = netdev_priv(dev);
2870 platform_set_drvdata(pdev, mp);
2871
2872 mp->shared = platform_get_drvdata(pd->shared);
2873 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2874 mp->port_num = pd->port_number;
2875
2876 mp->dev = dev;
2877
2878 set_params(mp, pd);
2879 netif_set_real_num_tx_queues(dev, mp->txq_count);
2880 netif_set_real_num_rx_queues(dev, mp->rxq_count);
2881
2882 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2883 mp->phy = phy_scan(mp, pd->phy_addr);
2884
2885 if (mp->phy != NULL)
2886 phy_init(mp, pd->speed, pd->duplex);
2887
2888 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2889
2890 init_pscr(mp, pd->speed, pd->duplex);
2891
2892
2893 mib_counters_clear(mp);
2894
2895 init_timer(&mp->mib_counters_timer);
2896 mp->mib_counters_timer.data = (unsigned long)mp;
2897 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2898 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2899 add_timer(&mp->mib_counters_timer);
2900
2901 spin_lock_init(&mp->mib_counters_lock);
2902
2903 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2904
2905 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2906
2907 init_timer(&mp->rx_oom);
2908 mp->rx_oom.data = (unsigned long)mp;
2909 mp->rx_oom.function = oom_timer_wrapper;
2910
2911
2912 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2913 BUG_ON(!res);
2914 dev->irq = res->start;
2915
2916 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2917
2918 dev->watchdog_timeo = 2 * HZ;
2919 dev->base_addr = 0;
2920
2921 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
2922 NETIF_F_RXCSUM | NETIF_F_LRO;
2923 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
2924 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2925
2926 SET_NETDEV_DEV(dev, &pdev->dev);
2927
2928 if (mp->shared->win_protect)
2929 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2930
2931 netif_carrier_off(dev);
2932
2933 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2934
2935 set_rx_coal(mp, 250);
2936 set_tx_coal(mp, 0);
2937
2938 err = register_netdev(dev);
2939 if (err)
2940 goto out;
2941
2942 netdev_notice(dev, "port %d with MAC address %pM\n",
2943 mp->port_num, dev->dev_addr);
2944
2945 if (mp->tx_desc_sram_size > 0)
2946 netdev_notice(dev, "configured with sram\n");
2947
2948 return 0;
2949
2950 out:
2951 free_netdev(dev);
2952
2953 return err;
2954 }
2955
2956 static int mv643xx_eth_remove(struct platform_device *pdev)
2957 {
2958 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2959
2960 unregister_netdev(mp->dev);
2961 if (mp->phy != NULL)
2962 phy_detach(mp->phy);
2963 cancel_work_sync(&mp->tx_timeout_task);
2964 free_netdev(mp->dev);
2965
2966 platform_set_drvdata(pdev, NULL);
2967
2968 return 0;
2969 }
2970
2971 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2972 {
2973 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2974
2975 /* Mask all interrupts on ethernet port */
2976 wrlp(mp, INT_MASK, 0);
2977 rdlp(mp, INT_MASK);
2978
2979 if (netif_running(mp->dev))
2980 port_reset(mp);
2981 }
2982
2983 static struct platform_driver mv643xx_eth_driver = {
2984 .probe = mv643xx_eth_probe,
2985 .remove = mv643xx_eth_remove,
2986 .shutdown = mv643xx_eth_shutdown,
2987 .driver = {
2988 .name = MV643XX_ETH_NAME,
2989 .owner = THIS_MODULE,
2990 },
2991 };
2992
2993 static int __init mv643xx_eth_init_module(void)
2994 {
2995 int rc;
2996
2997 rc = platform_driver_register(&mv643xx_eth_shared_driver);
2998 if (!rc) {
2999 rc = platform_driver_register(&mv643xx_eth_driver);
3000 if (rc)
3001 platform_driver_unregister(&mv643xx_eth_shared_driver);
3002 }
3003
3004 return rc;
3005 }
3006 module_init(mv643xx_eth_init_module);
3007
3008 static void __exit mv643xx_eth_cleanup_module(void)
3009 {
3010 platform_driver_unregister(&mv643xx_eth_driver);
3011 platform_driver_unregister(&mv643xx_eth_shared_driver);
3012 }
3013 module_exit(mv643xx_eth_cleanup_module);
3014
3015 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3016 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3017 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3018 MODULE_LICENSE("GPL");
3019 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3020 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
kernel-based virtual machine