projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs...
[deliverable/linux.git] / drivers / net / ethernet / marvell / 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 #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 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
717
718 if (skb_frag_size(fragp) <= 8 && fragp->page_offset & 7)
719 return 1;
720 }
721
722 return 0;
723 }
724
725 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
726 {
727 struct mv643xx_eth_private *mp = txq_to_mp(txq);
728 int nr_frags = skb_shinfo(skb)->nr_frags;
729 int frag;
730
731 for (frag = 0; frag < nr_frags; frag++) {
732 skb_frag_t *this_frag;
733 int tx_index;
734 struct tx_desc *desc;
735
736 this_frag = &skb_shinfo(skb)->frags[frag];
737 tx_index = txq->tx_curr_desc++;
738 if (txq->tx_curr_desc == txq->tx_ring_size)
739 txq->tx_curr_desc = 0;
740 desc = &txq->tx_desc_area[tx_index];
741
742 /*
743 * The last fragment will generate an interrupt
744 * which will free the skb on TX completion.
745 */
746 if (frag == nr_frags - 1) {
747 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
748 ZERO_PADDING | TX_LAST_DESC |
749 TX_ENABLE_INTERRUPT;
750 } else {
751 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
752 }
753
754 desc->l4i_chk = 0;
755 desc->byte_cnt = skb_frag_size(this_frag);
756 desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent,
757 this_frag, 0,
758 skb_frag_size(this_frag),
759 DMA_TO_DEVICE);
760 }
761 }
762
763 static inline __be16 sum16_as_be(__sum16 sum)
764 {
765 return (__force __be16)sum;
766 }
767
768 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
769 {
770 struct mv643xx_eth_private *mp = txq_to_mp(txq);
771 int nr_frags = skb_shinfo(skb)->nr_frags;
772 int tx_index;
773 struct tx_desc *desc;
774 u32 cmd_sts;
775 u16 l4i_chk;
776 int length;
777
778 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
779 l4i_chk = 0;
780
781 if (skb->ip_summed == CHECKSUM_PARTIAL) {
782 int hdr_len;
783 int tag_bytes;
784
785 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
786 skb->protocol != htons(ETH_P_8021Q));
787
788 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
789 tag_bytes = hdr_len - ETH_HLEN;
790 if (skb->len - hdr_len > mp->shared->tx_csum_limit ||
791 unlikely(tag_bytes & ~12)) {
792 if (skb_checksum_help(skb) == 0)
793 goto no_csum;
794 kfree_skb(skb);
795 return 1;
796 }
797
798 if (tag_bytes & 4)
799 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
800 if (tag_bytes & 8)
801 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
802
803 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
804 GEN_IP_V4_CHECKSUM |
805 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
806
807 switch (ip_hdr(skb)->protocol) {
808 case IPPROTO_UDP:
809 cmd_sts |= UDP_FRAME;
810 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
811 break;
812 case IPPROTO_TCP:
813 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
814 break;
815 default:
816 BUG();
817 }
818 } else {
819 no_csum:
820 /* Errata BTS #50, IHL must be 5 if no HW checksum */
821 cmd_sts |= 5 << TX_IHL_SHIFT;
822 }
823
824 tx_index = txq->tx_curr_desc++;
825 if (txq->tx_curr_desc == txq->tx_ring_size)
826 txq->tx_curr_desc = 0;
827 desc = &txq->tx_desc_area[tx_index];
828
829 if (nr_frags) {
830 txq_submit_frag_skb(txq, skb);
831 length = skb_headlen(skb);
832 } else {
833 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
834 length = skb->len;
835 }
836
837 desc->l4i_chk = l4i_chk;
838 desc->byte_cnt = length;
839 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data,
840 length, DMA_TO_DEVICE);
841
842 __skb_queue_tail(&txq->tx_skb, skb);
843
844 skb_tx_timestamp(skb);
845
846 /* ensure all other descriptors are written before first cmd_sts */
847 wmb();
848 desc->cmd_sts = cmd_sts;
849
850 /* clear TX_END status */
851 mp->work_tx_end &= ~(1 << txq->index);
852
853 /* ensure all descriptors are written before poking hardware */
854 wmb();
855 txq_enable(txq);
856
857 txq->tx_desc_count += nr_frags + 1;
858
859 return 0;
860 }
861
862 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
863 {
864 struct mv643xx_eth_private *mp = netdev_priv(dev);
865 int length, queue;
866 struct tx_queue *txq;
867 struct netdev_queue *nq;
868
869 queue = skb_get_queue_mapping(skb);
870 txq = mp->txq + queue;
871 nq = netdev_get_tx_queue(dev, queue);
872
873 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
874 txq->tx_dropped++;
875 netdev_printk(KERN_DEBUG, dev,
876 "failed to linearize skb with tiny unaligned fragment\n");
877 return NETDEV_TX_BUSY;
878 }
879
880 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
881 if (net_ratelimit())
882 netdev_err(dev, "tx queue full?!\n");
883 kfree_skb(skb);
884 return NETDEV_TX_OK;
885 }
886
887 length = skb->len;
888
889 if (!txq_submit_skb(txq, skb)) {
890 int entries_left;
891
892 txq->tx_bytes += length;
893 txq->tx_packets++;
894
895 entries_left = txq->tx_ring_size - txq->tx_desc_count;
896 if (entries_left < MAX_SKB_FRAGS + 1)
897 netif_tx_stop_queue(nq);
898 }
899
900 return NETDEV_TX_OK;
901 }
902
903
904 /* tx napi ******************************************************************/
905 static void txq_kick(struct tx_queue *txq)
906 {
907 struct mv643xx_eth_private *mp = txq_to_mp(txq);
908 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
909 u32 hw_desc_ptr;
910 u32 expected_ptr;
911
912 __netif_tx_lock(nq, smp_processor_id());
913
914 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
915 goto out;
916
917 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
918 expected_ptr = (u32)txq->tx_desc_dma +
919 txq->tx_curr_desc * sizeof(struct tx_desc);
920
921 if (hw_desc_ptr != expected_ptr)
922 txq_enable(txq);
923
924 out:
925 __netif_tx_unlock(nq);
926
927 mp->work_tx_end &= ~(1 << txq->index);
928 }
929
930 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
931 {
932 struct mv643xx_eth_private *mp = txq_to_mp(txq);
933 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
934 int reclaimed;
935
936 __netif_tx_lock(nq, smp_processor_id());
937
938 reclaimed = 0;
939 while (reclaimed < budget && txq->tx_desc_count > 0) {
940 int tx_index;
941 struct tx_desc *desc;
942 u32 cmd_sts;
943 struct sk_buff *skb;
944
945 tx_index = txq->tx_used_desc;
946 desc = &txq->tx_desc_area[tx_index];
947 cmd_sts = desc->cmd_sts;
948
949 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
950 if (!force)
951 break;
952 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
953 }
954
955 txq->tx_used_desc = tx_index + 1;
956 if (txq->tx_used_desc == txq->tx_ring_size)
957 txq->tx_used_desc = 0;
958
959 reclaimed++;
960 txq->tx_desc_count--;
961
962 skb = NULL;
963 if (cmd_sts & TX_LAST_DESC)
964 skb = __skb_dequeue(&txq->tx_skb);
965
966 if (cmd_sts & ERROR_SUMMARY) {
967 netdev_info(mp->dev, "tx error\n");
968 mp->dev->stats.tx_errors++;
969 }
970
971 if (cmd_sts & TX_FIRST_DESC) {
972 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
973 desc->byte_cnt, DMA_TO_DEVICE);
974 } else {
975 dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr,
976 desc->byte_cnt, DMA_TO_DEVICE);
977 }
978
979 if (skb != NULL) {
980 if (skb_queue_len(&mp->rx_recycle) <
981 mp->rx_ring_size &&
982 skb_recycle_check(skb, mp->skb_size))
983 __skb_queue_head(&mp->rx_recycle, skb);
984 else
985 dev_kfree_skb(skb);
986 }
987 }
988
989 __netif_tx_unlock(nq);
990
991 if (reclaimed < budget)
992 mp->work_tx &= ~(1 << txq->index);
993
994 return reclaimed;
995 }
996
997
998 /* tx rate control **********************************************************/
999 /*
1000 * Set total maximum TX rate (shared by all TX queues for this port)
1001 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
1002 */
1003 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
1004 {
1005 int token_rate;
1006 int mtu;
1007 int bucket_size;
1008
1009 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1010 if (token_rate > 1023)
1011 token_rate = 1023;
1012
1013 mtu = (mp->dev->mtu + 255) >> 8;
1014 if (mtu > 63)
1015 mtu = 63;
1016
1017 bucket_size = (burst + 255) >> 8;
1018 if (bucket_size > 65535)
1019 bucket_size = 65535;
1020
1021 switch (mp->shared->tx_bw_control) {
1022 case TX_BW_CONTROL_OLD_LAYOUT:
1023 wrlp(mp, TX_BW_RATE, token_rate);
1024 wrlp(mp, TX_BW_MTU, mtu);
1025 wrlp(mp, TX_BW_BURST, bucket_size);
1026 break;
1027 case TX_BW_CONTROL_NEW_LAYOUT:
1028 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1029 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1030 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1031 break;
1032 }
1033 }
1034
1035 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1036 {
1037 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1038 int token_rate;
1039 int bucket_size;
1040
1041 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1042 if (token_rate > 1023)
1043 token_rate = 1023;
1044
1045 bucket_size = (burst + 255) >> 8;
1046 if (bucket_size > 65535)
1047 bucket_size = 65535;
1048
1049 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1050 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1051 }
1052
1053 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1054 {
1055 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1056 int off;
1057 u32 val;
1058
1059 /*
1060 * Turn on fixed priority mode.
1061 */
1062 off = 0;
1063 switch (mp->shared->tx_bw_control) {
1064 case TX_BW_CONTROL_OLD_LAYOUT:
1065 off = TXQ_FIX_PRIO_CONF;
1066 break;
1067 case TX_BW_CONTROL_NEW_LAYOUT:
1068 off = TXQ_FIX_PRIO_CONF_MOVED;
1069 break;
1070 }
1071
1072 if (off) {
1073 val = rdlp(mp, off);
1074 val |= 1 << txq->index;
1075 wrlp(mp, off, val);
1076 }
1077 }
1078
1079
1080 /* mii management interface *************************************************/
1081 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1082 {
1083 struct mv643xx_eth_shared_private *msp = dev_id;
1084
1085 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1086 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1087 wake_up(&msp->smi_busy_wait);
1088 return IRQ_HANDLED;
1089 }
1090
1091 return IRQ_NONE;
1092 }
1093
1094 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1095 {
1096 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1097 }
1098
1099 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1100 {
1101 if (msp->err_interrupt == NO_IRQ) {
1102 int i;
1103
1104 for (i = 0; !smi_is_done(msp); i++) {
1105 if (i == 10)
1106 return -ETIMEDOUT;
1107 msleep(10);
1108 }
1109
1110 return 0;
1111 }
1112
1113 if (!smi_is_done(msp)) {
1114 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1115 msecs_to_jiffies(100));
1116 if (!smi_is_done(msp))
1117 return -ETIMEDOUT;
1118 }
1119
1120 return 0;
1121 }
1122
1123 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1124 {
1125 struct mv643xx_eth_shared_private *msp = bus->priv;
1126 void __iomem *smi_reg = msp->base + SMI_REG;
1127 int ret;
1128
1129 if (smi_wait_ready(msp)) {
1130 pr_warn("SMI bus busy timeout\n");
1131 return -ETIMEDOUT;
1132 }
1133
1134 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
1135
1136 if (smi_wait_ready(msp)) {
1137 pr_warn("SMI bus busy timeout\n");
1138 return -ETIMEDOUT;
1139 }
1140
1141 ret = readl(smi_reg);
1142 if (!(ret & SMI_READ_VALID)) {
1143 pr_warn("SMI bus read not valid\n");
1144 return -ENODEV;
1145 }
1146
1147 return ret & 0xffff;
1148 }
1149
1150 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1151 {
1152 struct mv643xx_eth_shared_private *msp = bus->priv;
1153 void __iomem *smi_reg = msp->base + SMI_REG;
1154
1155 if (smi_wait_ready(msp)) {
1156 pr_warn("SMI bus busy timeout\n");
1157 return -ETIMEDOUT;
1158 }
1159
1160 writel(SMI_OPCODE_WRITE | (reg << 21) |
1161 (addr << 16) | (val & 0xffff), smi_reg);
1162
1163 if (smi_wait_ready(msp)) {
1164 pr_warn("SMI bus busy timeout\n");
1165 return -ETIMEDOUT;
1166 }
1167
1168 return 0;
1169 }
1170
1171
1172 /* statistics ***************************************************************/
1173 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1174 {
1175 struct mv643xx_eth_private *mp = netdev_priv(dev);
1176 struct net_device_stats *stats = &dev->stats;
1177 unsigned long tx_packets = 0;
1178 unsigned long tx_bytes = 0;
1179 unsigned long tx_dropped = 0;
1180 int i;
1181
1182 for (i = 0; i < mp->txq_count; i++) {
1183 struct tx_queue *txq = mp->txq + i;
1184
1185 tx_packets += txq->tx_packets;
1186 tx_bytes += txq->tx_bytes;
1187 tx_dropped += txq->tx_dropped;
1188 }
1189
1190 stats->tx_packets = tx_packets;
1191 stats->tx_bytes = tx_bytes;
1192 stats->tx_dropped = tx_dropped;
1193
1194 return stats;
1195 }
1196
1197 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1198 {
1199 u32 lro_aggregated = 0;
1200 u32 lro_flushed = 0;
1201 u32 lro_no_desc = 0;
1202 int i;
1203
1204 for (i = 0; i < mp->rxq_count; i++) {
1205 struct rx_queue *rxq = mp->rxq + i;
1206
1207 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1208 lro_flushed += rxq->lro_mgr.stats.flushed;
1209 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1210 }
1211
1212 mp->lro_counters.lro_aggregated = lro_aggregated;
1213 mp->lro_counters.lro_flushed = lro_flushed;
1214 mp->lro_counters.lro_no_desc = lro_no_desc;
1215 }
1216
1217 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1218 {
1219 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1220 }
1221
1222 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1223 {
1224 int i;
1225
1226 for (i = 0; i < 0x80; i += 4)
1227 mib_read(mp, i);
1228 }
1229
1230 static void mib_counters_update(struct mv643xx_eth_private *mp)
1231 {
1232 struct mib_counters *p = &mp->mib_counters;
1233
1234 spin_lock_bh(&mp->mib_counters_lock);
1235 p->good_octets_received += mib_read(mp, 0x00);
1236 p->bad_octets_received += mib_read(mp, 0x08);
1237 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1238 p->good_frames_received += mib_read(mp, 0x10);
1239 p->bad_frames_received += mib_read(mp, 0x14);
1240 p->broadcast_frames_received += mib_read(mp, 0x18);
1241 p->multicast_frames_received += mib_read(mp, 0x1c);
1242 p->frames_64_octets += mib_read(mp, 0x20);
1243 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1244 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1245 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1246 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1247 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1248 p->good_octets_sent += mib_read(mp, 0x38);
1249 p->good_frames_sent += mib_read(mp, 0x40);
1250 p->excessive_collision += mib_read(mp, 0x44);
1251 p->multicast_frames_sent += mib_read(mp, 0x48);
1252 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1253 p->unrec_mac_control_received += mib_read(mp, 0x50);
1254 p->fc_sent += mib_read(mp, 0x54);
1255 p->good_fc_received += mib_read(mp, 0x58);
1256 p->bad_fc_received += mib_read(mp, 0x5c);
1257 p->undersize_received += mib_read(mp, 0x60);
1258 p->fragments_received += mib_read(mp, 0x64);
1259 p->oversize_received += mib_read(mp, 0x68);
1260 p->jabber_received += mib_read(mp, 0x6c);
1261 p->mac_receive_error += mib_read(mp, 0x70);
1262 p->bad_crc_event += mib_read(mp, 0x74);
1263 p->collision += mib_read(mp, 0x78);
1264 p->late_collision += mib_read(mp, 0x7c);
1265 spin_unlock_bh(&mp->mib_counters_lock);
1266
1267 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1268 }
1269
1270 static void mib_counters_timer_wrapper(unsigned long _mp)
1271 {
1272 struct mv643xx_eth_private *mp = (void *)_mp;
1273
1274 mib_counters_update(mp);
1275 }
1276
1277
1278 /* interrupt coalescing *****************************************************/
1279 /*
1280 * Hardware coalescing parameters are set in units of 64 t_clk
1281 * cycles. I.e.:
1282 *
1283 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1284 *
1285 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1286 *
1287 * In the ->set*() methods, we round the computed register value
1288 * to the nearest integer.
1289 */
1290 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1291 {
1292 u32 val = rdlp(mp, SDMA_CONFIG);
1293 u64 temp;
1294
1295 if (mp->shared->extended_rx_coal_limit)
1296 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1297 else
1298 temp = (val & 0x003fff00) >> 8;
1299
1300 temp *= 64000000;
1301 do_div(temp, mp->shared->t_clk);
1302
1303 return (unsigned int)temp;
1304 }
1305
1306 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1307 {
1308 u64 temp;
1309 u32 val;
1310
1311 temp = (u64)usec * mp->shared->t_clk;
1312 temp += 31999999;
1313 do_div(temp, 64000000);
1314
1315 val = rdlp(mp, SDMA_CONFIG);
1316 if (mp->shared->extended_rx_coal_limit) {
1317 if (temp > 0xffff)
1318 temp = 0xffff;
1319 val &= ~0x023fff80;
1320 val |= (temp & 0x8000) << 10;
1321 val |= (temp & 0x7fff) << 7;
1322 } else {
1323 if (temp > 0x3fff)
1324 temp = 0x3fff;
1325 val &= ~0x003fff00;
1326 val |= (temp & 0x3fff) << 8;
1327 }
1328 wrlp(mp, SDMA_CONFIG, val);
1329 }
1330
1331 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1332 {
1333 u64 temp;
1334
1335 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1336 temp *= 64000000;
1337 do_div(temp, mp->shared->t_clk);
1338
1339 return (unsigned int)temp;
1340 }
1341
1342 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1343 {
1344 u64 temp;
1345
1346 temp = (u64)usec * mp->shared->t_clk;
1347 temp += 31999999;
1348 do_div(temp, 64000000);
1349
1350 if (temp > 0x3fff)
1351 temp = 0x3fff;
1352
1353 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1354 }
1355
1356
1357 /* ethtool ******************************************************************/
1358 struct mv643xx_eth_stats {
1359 char stat_string[ETH_GSTRING_LEN];
1360 int sizeof_stat;
1361 int netdev_off;
1362 int mp_off;
1363 };
1364
1365 #define SSTAT(m) \
1366 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1367 offsetof(struct net_device, stats.m), -1 }
1368
1369 #define MIBSTAT(m) \
1370 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1371 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1372
1373 #define LROSTAT(m) \
1374 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1375 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1376
1377 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1378 SSTAT(rx_packets),
1379 SSTAT(tx_packets),
1380 SSTAT(rx_bytes),
1381 SSTAT(tx_bytes),
1382 SSTAT(rx_errors),
1383 SSTAT(tx_errors),
1384 SSTAT(rx_dropped),
1385 SSTAT(tx_dropped),
1386 MIBSTAT(good_octets_received),
1387 MIBSTAT(bad_octets_received),
1388 MIBSTAT(internal_mac_transmit_err),
1389 MIBSTAT(good_frames_received),
1390 MIBSTAT(bad_frames_received),
1391 MIBSTAT(broadcast_frames_received),
1392 MIBSTAT(multicast_frames_received),
1393 MIBSTAT(frames_64_octets),
1394 MIBSTAT(frames_65_to_127_octets),
1395 MIBSTAT(frames_128_to_255_octets),
1396 MIBSTAT(frames_256_to_511_octets),
1397 MIBSTAT(frames_512_to_1023_octets),
1398 MIBSTAT(frames_1024_to_max_octets),
1399 MIBSTAT(good_octets_sent),
1400 MIBSTAT(good_frames_sent),
1401 MIBSTAT(excessive_collision),
1402 MIBSTAT(multicast_frames_sent),
1403 MIBSTAT(broadcast_frames_sent),
1404 MIBSTAT(unrec_mac_control_received),
1405 MIBSTAT(fc_sent),
1406 MIBSTAT(good_fc_received),
1407 MIBSTAT(bad_fc_received),
1408 MIBSTAT(undersize_received),
1409 MIBSTAT(fragments_received),
1410 MIBSTAT(oversize_received),
1411 MIBSTAT(jabber_received),
1412 MIBSTAT(mac_receive_error),
1413 MIBSTAT(bad_crc_event),
1414 MIBSTAT(collision),
1415 MIBSTAT(late_collision),
1416 LROSTAT(lro_aggregated),
1417 LROSTAT(lro_flushed),
1418 LROSTAT(lro_no_desc),
1419 };
1420
1421 static int
1422 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1423 struct ethtool_cmd *cmd)
1424 {
1425 int err;
1426
1427 err = phy_read_status(mp->phy);
1428 if (err == 0)
1429 err = phy_ethtool_gset(mp->phy, cmd);
1430
1431 /*
1432 * The MAC does not support 1000baseT_Half.
1433 */
1434 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1435 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1436
1437 return err;
1438 }
1439
1440 static int
1441 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1442 struct ethtool_cmd *cmd)
1443 {
1444 u32 port_status;
1445
1446 port_status = rdlp(mp, PORT_STATUS);
1447
1448 cmd->supported = SUPPORTED_MII;
1449 cmd->advertising = ADVERTISED_MII;
1450 switch (port_status & PORT_SPEED_MASK) {
1451 case PORT_SPEED_10:
1452 ethtool_cmd_speed_set(cmd, SPEED_10);
1453 break;
1454 case PORT_SPEED_100:
1455 ethtool_cmd_speed_set(cmd, SPEED_100);
1456 break;
1457 case PORT_SPEED_1000:
1458 ethtool_cmd_speed_set(cmd, SPEED_1000);
1459 break;
1460 default:
1461 cmd->speed = -1;
1462 break;
1463 }
1464 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1465 cmd->port = PORT_MII;
1466 cmd->phy_address = 0;
1467 cmd->transceiver = XCVR_INTERNAL;
1468 cmd->autoneg = AUTONEG_DISABLE;
1469 cmd->maxtxpkt = 1;
1470 cmd->maxrxpkt = 1;
1471
1472 return 0;
1473 }
1474
1475 static int
1476 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1477 {
1478 struct mv643xx_eth_private *mp = netdev_priv(dev);
1479
1480 if (mp->phy != NULL)
1481 return mv643xx_eth_get_settings_phy(mp, cmd);
1482 else
1483 return mv643xx_eth_get_settings_phyless(mp, cmd);
1484 }
1485
1486 static int
1487 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1488 {
1489 struct mv643xx_eth_private *mp = netdev_priv(dev);
1490
1491 if (mp->phy == NULL)
1492 return -EINVAL;
1493
1494 /*
1495 * The MAC does not support 1000baseT_Half.
1496 */
1497 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1498
1499 return phy_ethtool_sset(mp->phy, cmd);
1500 }
1501
1502 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1503 struct ethtool_drvinfo *drvinfo)
1504 {
1505 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1506 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1507 strncpy(drvinfo->fw_version, "N/A", 32);
1508 strncpy(drvinfo->bus_info, "platform", 32);
1509 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1510 }
1511
1512 static int mv643xx_eth_nway_reset(struct net_device *dev)
1513 {
1514 struct mv643xx_eth_private *mp = netdev_priv(dev);
1515
1516 if (mp->phy == NULL)
1517 return -EINVAL;
1518
1519 return genphy_restart_aneg(mp->phy);
1520 }
1521
1522 static int
1523 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1524 {
1525 struct mv643xx_eth_private *mp = netdev_priv(dev);
1526
1527 ec->rx_coalesce_usecs = get_rx_coal(mp);
1528 ec->tx_coalesce_usecs = get_tx_coal(mp);
1529
1530 return 0;
1531 }
1532
1533 static int
1534 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1535 {
1536 struct mv643xx_eth_private *mp = netdev_priv(dev);
1537
1538 set_rx_coal(mp, ec->rx_coalesce_usecs);
1539 set_tx_coal(mp, ec->tx_coalesce_usecs);
1540
1541 return 0;
1542 }
1543
1544 static void
1545 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1546 {
1547 struct mv643xx_eth_private *mp = netdev_priv(dev);
1548
1549 er->rx_max_pending = 4096;
1550 er->tx_max_pending = 4096;
1551
1552 er->rx_pending = mp->rx_ring_size;
1553 er->tx_pending = mp->tx_ring_size;
1554 }
1555
1556 static int
1557 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1558 {
1559 struct mv643xx_eth_private *mp = netdev_priv(dev);
1560
1561 if (er->rx_mini_pending || er->rx_jumbo_pending)
1562 return -EINVAL;
1563
1564 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1565 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1566
1567 if (netif_running(dev)) {
1568 mv643xx_eth_stop(dev);
1569 if (mv643xx_eth_open(dev)) {
1570 netdev_err(dev,
1571 "fatal error on re-opening device after ring param change\n");
1572 return -ENOMEM;
1573 }
1574 }
1575
1576 return 0;
1577 }
1578
1579
1580 static int
1581 mv643xx_eth_set_features(struct net_device *dev, u32 features)
1582 {
1583 struct mv643xx_eth_private *mp = netdev_priv(dev);
1584 u32 rx_csum = features & NETIF_F_RXCSUM;
1585
1586 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1587
1588 return 0;
1589 }
1590
1591 static void mv643xx_eth_get_strings(struct net_device *dev,
1592 uint32_t stringset, uint8_t *data)
1593 {
1594 int i;
1595
1596 if (stringset == ETH_SS_STATS) {
1597 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1598 memcpy(data + i * ETH_GSTRING_LEN,
1599 mv643xx_eth_stats[i].stat_string,
1600 ETH_GSTRING_LEN);
1601 }
1602 }
1603 }
1604
1605 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1606 struct ethtool_stats *stats,
1607 uint64_t *data)
1608 {
1609 struct mv643xx_eth_private *mp = netdev_priv(dev);
1610 int i;
1611
1612 mv643xx_eth_get_stats(dev);
1613 mib_counters_update(mp);
1614 mv643xx_eth_grab_lro_stats(mp);
1615
1616 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1617 const struct mv643xx_eth_stats *stat;
1618 void *p;
1619
1620 stat = mv643xx_eth_stats + i;
1621
1622 if (stat->netdev_off >= 0)
1623 p = ((void *)mp->dev) + stat->netdev_off;
1624 else
1625 p = ((void *)mp) + stat->mp_off;
1626
1627 data[i] = (stat->sizeof_stat == 8) ?
1628 *(uint64_t *)p : *(uint32_t *)p;
1629 }
1630 }
1631
1632 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1633 {
1634 if (sset == ETH_SS_STATS)
1635 return ARRAY_SIZE(mv643xx_eth_stats);
1636
1637 return -EOPNOTSUPP;
1638 }
1639
1640 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1641 .get_settings = mv643xx_eth_get_settings,
1642 .set_settings = mv643xx_eth_set_settings,
1643 .get_drvinfo = mv643xx_eth_get_drvinfo,
1644 .nway_reset = mv643xx_eth_nway_reset,
1645 .get_link = ethtool_op_get_link,
1646 .get_coalesce = mv643xx_eth_get_coalesce,
1647 .set_coalesce = mv643xx_eth_set_coalesce,
1648 .get_ringparam = mv643xx_eth_get_ringparam,
1649 .set_ringparam = mv643xx_eth_set_ringparam,
1650 .get_strings = mv643xx_eth_get_strings,
1651 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1652 .get_sset_count = mv643xx_eth_get_sset_count,
1653 };
1654
1655
1656 /* address handling *********************************************************/
1657 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1658 {
1659 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1660 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1661
1662 addr[0] = (mac_h >> 24) & 0xff;
1663 addr[1] = (mac_h >> 16) & 0xff;
1664 addr[2] = (mac_h >> 8) & 0xff;
1665 addr[3] = mac_h & 0xff;
1666 addr[4] = (mac_l >> 8) & 0xff;
1667 addr[5] = mac_l & 0xff;
1668 }
1669
1670 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1671 {
1672 wrlp(mp, MAC_ADDR_HIGH,
1673 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1674 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1675 }
1676
1677 static u32 uc_addr_filter_mask(struct net_device *dev)
1678 {
1679 struct netdev_hw_addr *ha;
1680 u32 nibbles;
1681
1682 if (dev->flags & IFF_PROMISC)
1683 return 0;
1684
1685 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1686 netdev_for_each_uc_addr(ha, dev) {
1687 if (memcmp(dev->dev_addr, ha->addr, 5))
1688 return 0;
1689 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
1690 return 0;
1691
1692 nibbles |= 1 << (ha->addr[5] & 0x0f);
1693 }
1694
1695 return nibbles;
1696 }
1697
1698 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1699 {
1700 struct mv643xx_eth_private *mp = netdev_priv(dev);
1701 u32 port_config;
1702 u32 nibbles;
1703 int i;
1704
1705 uc_addr_set(mp, dev->dev_addr);
1706
1707 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
1708
1709 nibbles = uc_addr_filter_mask(dev);
1710 if (!nibbles) {
1711 port_config |= UNICAST_PROMISCUOUS_MODE;
1712 nibbles = 0xffff;
1713 }
1714
1715 for (i = 0; i < 16; i += 4) {
1716 int off = UNICAST_TABLE(mp->port_num) + i;
1717 u32 v;
1718
1719 v = 0;
1720 if (nibbles & 1)
1721 v |= 0x00000001;
1722 if (nibbles & 2)
1723 v |= 0x00000100;
1724 if (nibbles & 4)
1725 v |= 0x00010000;
1726 if (nibbles & 8)
1727 v |= 0x01000000;
1728 nibbles >>= 4;
1729
1730 wrl(mp, off, v);
1731 }
1732
1733 wrlp(mp, PORT_CONFIG, port_config);
1734 }
1735
1736 static int addr_crc(unsigned char *addr)
1737 {
1738 int crc = 0;
1739 int i;
1740
1741 for (i = 0; i < 6; i++) {
1742 int j;
1743
1744 crc = (crc ^ addr[i]) << 8;
1745 for (j = 7; j >= 0; j--) {
1746 if (crc & (0x100 << j))
1747 crc ^= 0x107 << j;
1748 }
1749 }
1750
1751 return crc;
1752 }
1753
1754 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1755 {
1756 struct mv643xx_eth_private *mp = netdev_priv(dev);
1757 u32 *mc_spec;
1758 u32 *mc_other;
1759 struct netdev_hw_addr *ha;
1760 int i;
1761
1762 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1763 int port_num;
1764 u32 accept;
1765
1766 oom:
1767 port_num = mp->port_num;
1768 accept = 0x01010101;
1769 for (i = 0; i < 0x100; i += 4) {
1770 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1771 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1772 }
1773 return;
1774 }
1775
1776 mc_spec = kmalloc(0x200, GFP_ATOMIC);
1777 if (mc_spec == NULL)
1778 goto oom;
1779 mc_other = mc_spec + (0x100 >> 2);
1780
1781 memset(mc_spec, 0, 0x100);
1782 memset(mc_other, 0, 0x100);
1783
1784 netdev_for_each_mc_addr(ha, dev) {
1785 u8 *a = ha->addr;
1786 u32 *table;
1787 int entry;
1788
1789 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1790 table = mc_spec;
1791 entry = a[5];
1792 } else {
1793 table = mc_other;
1794 entry = addr_crc(a);
1795 }
1796
1797 table[entry >> 2] |= 1 << (8 * (entry & 3));
1798 }
1799
1800 for (i = 0; i < 0x100; i += 4) {
1801 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]);
1802 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]);
1803 }
1804
1805 kfree(mc_spec);
1806 }
1807
1808 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1809 {
1810 mv643xx_eth_program_unicast_filter(dev);
1811 mv643xx_eth_program_multicast_filter(dev);
1812 }
1813
1814 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1815 {
1816 struct sockaddr *sa = addr;
1817
1818 if (!is_valid_ether_addr(sa->sa_data))
1819 return -EINVAL;
1820
1821 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1822
1823 netif_addr_lock_bh(dev);
1824 mv643xx_eth_program_unicast_filter(dev);
1825 netif_addr_unlock_bh(dev);
1826
1827 return 0;
1828 }
1829
1830
1831 /* rx/tx queue initialisation ***********************************************/
1832 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1833 {
1834 struct rx_queue *rxq = mp->rxq + index;
1835 struct rx_desc *rx_desc;
1836 int size;
1837 int i;
1838
1839 rxq->index = index;
1840
1841 rxq->rx_ring_size = mp->rx_ring_size;
1842
1843 rxq->rx_desc_count = 0;
1844 rxq->rx_curr_desc = 0;
1845 rxq->rx_used_desc = 0;
1846
1847 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1848
1849 if (index == 0 && size <= mp->rx_desc_sram_size) {
1850 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1851 mp->rx_desc_sram_size);
1852 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1853 } else {
1854 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1855 size, &rxq->rx_desc_dma,
1856 GFP_KERNEL);
1857 }
1858
1859 if (rxq->rx_desc_area == NULL) {
1860 netdev_err(mp->dev,
1861 "can't allocate rx ring (%d bytes)\n", size);
1862 goto out;
1863 }
1864 memset(rxq->rx_desc_area, 0, size);
1865
1866 rxq->rx_desc_area_size = size;
1867 rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1868 GFP_KERNEL);
1869 if (rxq->rx_skb == NULL) {
1870 netdev_err(mp->dev, "can't allocate rx skb ring\n");
1871 goto out_free;
1872 }
1873
1874 rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1875 for (i = 0; i < rxq->rx_ring_size; i++) {
1876 int nexti;
1877
1878 nexti = i + 1;
1879 if (nexti == rxq->rx_ring_size)
1880 nexti = 0;
1881
1882 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1883 nexti * sizeof(struct rx_desc);
1884 }
1885
1886 rxq->lro_mgr.dev = mp->dev;
1887 memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats));
1888 rxq->lro_mgr.features = LRO_F_NAPI;
1889 rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1890 rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1891 rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr);
1892 rxq->lro_mgr.max_aggr = 32;
1893 rxq->lro_mgr.frag_align_pad = 0;
1894 rxq->lro_mgr.lro_arr = rxq->lro_arr;
1895 rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header;
1896
1897 memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr));
1898
1899 return 0;
1900
1901
1902 out_free:
1903 if (index == 0 && size <= mp->rx_desc_sram_size)
1904 iounmap(rxq->rx_desc_area);
1905 else
1906 dma_free_coherent(mp->dev->dev.parent, size,
1907 rxq->rx_desc_area,
1908 rxq->rx_desc_dma);
1909
1910 out:
1911 return -ENOMEM;
1912 }
1913
1914 static void rxq_deinit(struct rx_queue *rxq)
1915 {
1916 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1917 int i;
1918
1919 rxq_disable(rxq);
1920
1921 for (i = 0; i < rxq->rx_ring_size; i++) {
1922 if (rxq->rx_skb[i]) {
1923 dev_kfree_skb(rxq->rx_skb[i]);
1924 rxq->rx_desc_count--;
1925 }
1926 }
1927
1928 if (rxq->rx_desc_count) {
1929 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n",
1930 rxq->rx_desc_count);
1931 }
1932
1933 if (rxq->index == 0 &&
1934 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1935 iounmap(rxq->rx_desc_area);
1936 else
1937 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size,
1938 rxq->rx_desc_area, rxq->rx_desc_dma);
1939
1940 kfree(rxq->rx_skb);
1941 }
1942
1943 static int txq_init(struct mv643xx_eth_private *mp, int index)
1944 {
1945 struct tx_queue *txq = mp->txq + index;
1946 struct tx_desc *tx_desc;
1947 int size;
1948 int i;
1949
1950 txq->index = index;
1951
1952 txq->tx_ring_size = mp->tx_ring_size;
1953
1954 txq->tx_desc_count = 0;
1955 txq->tx_curr_desc = 0;
1956 txq->tx_used_desc = 0;
1957
1958 size = txq->tx_ring_size * sizeof(struct tx_desc);
1959
1960 if (index == 0 && size <= mp->tx_desc_sram_size) {
1961 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
1962 mp->tx_desc_sram_size);
1963 txq->tx_desc_dma = mp->tx_desc_sram_addr;
1964 } else {
1965 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent,
1966 size, &txq->tx_desc_dma,
1967 GFP_KERNEL);
1968 }
1969
1970 if (txq->tx_desc_area == NULL) {
1971 netdev_err(mp->dev,
1972 "can't allocate tx ring (%d bytes)\n", size);
1973 return -ENOMEM;
1974 }
1975 memset(txq->tx_desc_area, 0, size);
1976
1977 txq->tx_desc_area_size = size;
1978
1979 tx_desc = (struct tx_desc *)txq->tx_desc_area;
1980 for (i = 0; i < txq->tx_ring_size; i++) {
1981 struct tx_desc *txd = tx_desc + i;
1982 int nexti;
1983
1984 nexti = i + 1;
1985 if (nexti == txq->tx_ring_size)
1986 nexti = 0;
1987
1988 txd->cmd_sts = 0;
1989 txd->next_desc_ptr = txq->tx_desc_dma +
1990 nexti * sizeof(struct tx_desc);
1991 }
1992
1993 skb_queue_head_init(&txq->tx_skb);
1994
1995 return 0;
1996 }
1997
1998 static void txq_deinit(struct tx_queue *txq)
1999 {
2000 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2001
2002 txq_disable(txq);
2003 txq_reclaim(txq, txq->tx_ring_size, 1);
2004
2005 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2006
2007 if (txq->index == 0 &&
2008 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2009 iounmap(txq->tx_desc_area);
2010 else
2011 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size,
2012 txq->tx_desc_area, txq->tx_desc_dma);
2013 }
2014
2015
2016 /* netdev ops and related ***************************************************/
2017 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2018 {
2019 u32 int_cause;
2020 u32 int_cause_ext;
2021
2022 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask;
2023 if (int_cause == 0)
2024 return 0;
2025
2026 int_cause_ext = 0;
2027 if (int_cause & INT_EXT) {
2028 int_cause &= ~INT_EXT;
2029 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2030 }
2031
2032 if (int_cause) {
2033 wrlp(mp, INT_CAUSE, ~int_cause);
2034 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2035 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2036 mp->work_rx |= (int_cause & INT_RX) >> 2;
2037 }
2038
2039 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2040 if (int_cause_ext) {
2041 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2042 if (int_cause_ext & INT_EXT_LINK_PHY)
2043 mp->work_link = 1;
2044 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2045 }
2046
2047 return 1;
2048 }
2049
2050 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2051 {
2052 struct net_device *dev = (struct net_device *)dev_id;
2053 struct mv643xx_eth_private *mp = netdev_priv(dev);
2054
2055 if (unlikely(!mv643xx_eth_collect_events(mp)))
2056 return IRQ_NONE;
2057
2058 wrlp(mp, INT_MASK, 0);
2059 napi_schedule(&mp->napi);
2060
2061 return IRQ_HANDLED;
2062 }
2063
2064 static void handle_link_event(struct mv643xx_eth_private *mp)
2065 {
2066 struct net_device *dev = mp->dev;
2067 u32 port_status;
2068 int speed;
2069 int duplex;
2070 int fc;
2071
2072 port_status = rdlp(mp, PORT_STATUS);
2073 if (!(port_status & LINK_UP)) {
2074 if (netif_carrier_ok(dev)) {
2075 int i;
2076
2077 netdev_info(dev, "link down\n");
2078
2079 netif_carrier_off(dev);
2080
2081 for (i = 0; i < mp->txq_count; i++) {
2082 struct tx_queue *txq = mp->txq + i;
2083
2084 txq_reclaim(txq, txq->tx_ring_size, 1);
2085 txq_reset_hw_ptr(txq);
2086 }
2087 }
2088 return;
2089 }
2090
2091 switch (port_status & PORT_SPEED_MASK) {
2092 case PORT_SPEED_10:
2093 speed = 10;
2094 break;
2095 case PORT_SPEED_100:
2096 speed = 100;
2097 break;
2098 case PORT_SPEED_1000:
2099 speed = 1000;
2100 break;
2101 default:
2102 speed = -1;
2103 break;
2104 }
2105 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2106 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2107
2108 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n",
2109 speed, duplex ? "full" : "half", fc ? "en" : "dis");
2110
2111 if (!netif_carrier_ok(dev))
2112 netif_carrier_on(dev);
2113 }
2114
2115 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2116 {
2117 struct mv643xx_eth_private *mp;
2118 int work_done;
2119
2120 mp = container_of(napi, struct mv643xx_eth_private, napi);
2121
2122 if (unlikely(mp->oom)) {
2123 mp->oom = 0;
2124 del_timer(&mp->rx_oom);
2125 }
2126
2127 work_done = 0;
2128 while (work_done < budget) {
2129 u8 queue_mask;
2130 int queue;
2131 int work_tbd;
2132
2133 if (mp->work_link) {
2134 mp->work_link = 0;
2135 handle_link_event(mp);
2136 work_done++;
2137 continue;
2138 }
2139
2140 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2141 if (likely(!mp->oom))
2142 queue_mask |= mp->work_rx_refill;
2143
2144 if (!queue_mask) {
2145 if (mv643xx_eth_collect_events(mp))
2146 continue;
2147 break;
2148 }
2149
2150 queue = fls(queue_mask) - 1;
2151 queue_mask = 1 << queue;
2152
2153 work_tbd = budget - work_done;
2154 if (work_tbd > 16)
2155 work_tbd = 16;
2156
2157 if (mp->work_tx_end & queue_mask) {
2158 txq_kick(mp->txq + queue);
2159 } else if (mp->work_tx & queue_mask) {
2160 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2161 txq_maybe_wake(mp->txq + queue);
2162 } else if (mp->work_rx & queue_mask) {
2163 work_done += rxq_process(mp->rxq + queue, work_tbd);
2164 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2165 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2166 } else {
2167 BUG();
2168 }
2169 }
2170
2171 if (work_done < budget) {
2172 if (mp->oom)
2173 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2174 napi_complete(napi);
2175 wrlp(mp, INT_MASK, mp->int_mask);
2176 }
2177
2178 return work_done;
2179 }
2180
2181 static inline void oom_timer_wrapper(unsigned long data)
2182 {
2183 struct mv643xx_eth_private *mp = (void *)data;
2184
2185 napi_schedule(&mp->napi);
2186 }
2187
2188 static void phy_reset(struct mv643xx_eth_private *mp)
2189 {
2190 int data;
2191
2192 data = phy_read(mp->phy, MII_BMCR);
2193 if (data < 0)
2194 return;
2195
2196 data |= BMCR_RESET;
2197 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2198 return;
2199
2200 do {
2201 data = phy_read(mp->phy, MII_BMCR);
2202 } while (data >= 0 && data & BMCR_RESET);
2203 }
2204
2205 static void port_start(struct mv643xx_eth_private *mp)
2206 {
2207 u32 pscr;
2208 int i;
2209
2210 /*
2211 * Perform PHY reset, if there is a PHY.
2212 */
2213 if (mp->phy != NULL) {
2214 struct ethtool_cmd cmd;
2215
2216 mv643xx_eth_get_settings(mp->dev, &cmd);
2217 phy_reset(mp);
2218 mv643xx_eth_set_settings(mp->dev, &cmd);
2219 }
2220
2221 /*
2222 * Configure basic link parameters.
2223 */
2224 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2225
2226 pscr |= SERIAL_PORT_ENABLE;
2227 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2228
2229 pscr |= DO_NOT_FORCE_LINK_FAIL;
2230 if (mp->phy == NULL)
2231 pscr |= FORCE_LINK_PASS;
2232 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2233
2234 /*
2235 * Configure TX path and queues.
2236 */
2237 tx_set_rate(mp, 1000000000, 16777216);
2238 for (i = 0; i < mp->txq_count; i++) {
2239 struct tx_queue *txq = mp->txq + i;
2240
2241 txq_reset_hw_ptr(txq);
2242 txq_set_rate(txq, 1000000000, 16777216);
2243 txq_set_fixed_prio_mode(txq);
2244 }
2245
2246 /*
2247 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2248 * frames to RX queue #0, and include the pseudo-header when
2249 * calculating receive checksums.
2250 */
2251 mv643xx_eth_set_features(mp->dev, mp->dev->features);
2252
2253 /*
2254 * Treat BPDUs as normal multicasts, and disable partition mode.
2255 */
2256 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2257
2258 /*
2259 * Add configured unicast addresses to address filter table.
2260 */
2261 mv643xx_eth_program_unicast_filter(mp->dev);
2262
2263 /*
2264 * Enable the receive queues.
2265 */
2266 for (i = 0; i < mp->rxq_count; i++) {
2267 struct rx_queue *rxq = mp->rxq + i;
2268 u32 addr;
2269
2270 addr = (u32)rxq->rx_desc_dma;
2271 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2272 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2273
2274 rxq_enable(rxq);
2275 }
2276 }
2277
2278 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2279 {
2280 int skb_size;
2281
2282 /*
2283 * Reserve 2+14 bytes for an ethernet header (the hardware
2284 * automatically prepends 2 bytes of dummy data to each
2285 * received packet), 16 bytes for up to four VLAN tags, and
2286 * 4 bytes for the trailing FCS -- 36 bytes total.
2287 */
2288 skb_size = mp->dev->mtu + 36;
2289
2290 /*
2291 * Make sure that the skb size is a multiple of 8 bytes, as
2292 * the lower three bits of the receive descriptor's buffer
2293 * size field are ignored by the hardware.
2294 */
2295 mp->skb_size = (skb_size + 7) & ~7;
2296
2297 /*
2298 * If NET_SKB_PAD is smaller than a cache line,
2299 * netdev_alloc_skb() will cause skb->data to be misaligned
2300 * to a cache line boundary. If this is the case, include
2301 * some extra space to allow re-aligning the data area.
2302 */
2303 mp->skb_size += SKB_DMA_REALIGN;
2304 }
2305
2306 static int mv643xx_eth_open(struct net_device *dev)
2307 {
2308 struct mv643xx_eth_private *mp = netdev_priv(dev);
2309 int err;
2310 int i;
2311
2312 wrlp(mp, INT_CAUSE, 0);
2313 wrlp(mp, INT_CAUSE_EXT, 0);
2314 rdlp(mp, INT_CAUSE_EXT);
2315
2316 err = request_irq(dev->irq, mv643xx_eth_irq,
2317 IRQF_SHARED, dev->name, dev);
2318 if (err) {
2319 netdev_err(dev, "can't assign irq\n");
2320 return -EAGAIN;
2321 }
2322
2323 mv643xx_eth_recalc_skb_size(mp);
2324
2325 napi_enable(&mp->napi);
2326
2327 skb_queue_head_init(&mp->rx_recycle);
2328
2329 mp->int_mask = INT_EXT;
2330
2331 for (i = 0; i < mp->rxq_count; i++) {
2332 err = rxq_init(mp, i);
2333 if (err) {
2334 while (--i >= 0)
2335 rxq_deinit(mp->rxq + i);
2336 goto out;
2337 }
2338
2339 rxq_refill(mp->rxq + i, INT_MAX);
2340 mp->int_mask |= INT_RX_0 << i;
2341 }
2342
2343 if (mp->oom) {
2344 mp->rx_oom.expires = jiffies + (HZ / 10);
2345 add_timer(&mp->rx_oom);
2346 }
2347
2348 for (i = 0; i < mp->txq_count; i++) {
2349 err = txq_init(mp, i);
2350 if (err) {
2351 while (--i >= 0)
2352 txq_deinit(mp->txq + i);
2353 goto out_free;
2354 }
2355 mp->int_mask |= INT_TX_END_0 << i;
2356 }
2357
2358 port_start(mp);
2359
2360 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2361 wrlp(mp, INT_MASK, mp->int_mask);
2362
2363 return 0;
2364
2365
2366 out_free:
2367 for (i = 0; i < mp->rxq_count; i++)
2368 rxq_deinit(mp->rxq + i);
2369 out:
2370 free_irq(dev->irq, dev);
2371
2372 return err;
2373 }
2374
2375 static void port_reset(struct mv643xx_eth_private *mp)
2376 {
2377 unsigned int data;
2378 int i;
2379
2380 for (i = 0; i < mp->rxq_count; i++)
2381 rxq_disable(mp->rxq + i);
2382 for (i = 0; i < mp->txq_count; i++)
2383 txq_disable(mp->txq + i);
2384
2385 while (1) {
2386 u32 ps = rdlp(mp, PORT_STATUS);
2387
2388 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2389 break;
2390 udelay(10);
2391 }
2392
2393 /* Reset the Enable bit in the Configuration Register */
2394 data = rdlp(mp, PORT_SERIAL_CONTROL);
2395 data &= ~(SERIAL_PORT_ENABLE |
2396 DO_NOT_FORCE_LINK_FAIL |
2397 FORCE_LINK_PASS);
2398 wrlp(mp, PORT_SERIAL_CONTROL, data);
2399 }
2400
2401 static int mv643xx_eth_stop(struct net_device *dev)
2402 {
2403 struct mv643xx_eth_private *mp = netdev_priv(dev);
2404 int i;
2405
2406 wrlp(mp, INT_MASK_EXT, 0x00000000);
2407 wrlp(mp, INT_MASK, 0x00000000);
2408 rdlp(mp, INT_MASK);
2409
2410 napi_disable(&mp->napi);
2411
2412 del_timer_sync(&mp->rx_oom);
2413
2414 netif_carrier_off(dev);
2415
2416 free_irq(dev->irq, dev);
2417
2418 port_reset(mp);
2419 mv643xx_eth_get_stats(dev);
2420 mib_counters_update(mp);
2421 del_timer_sync(&mp->mib_counters_timer);
2422
2423 skb_queue_purge(&mp->rx_recycle);
2424
2425 for (i = 0; i < mp->rxq_count; i++)
2426 rxq_deinit(mp->rxq + i);
2427 for (i = 0; i < mp->txq_count; i++)
2428 txq_deinit(mp->txq + i);
2429
2430 return 0;
2431 }
2432
2433 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2434 {
2435 struct mv643xx_eth_private *mp = netdev_priv(dev);
2436
2437 if (mp->phy != NULL)
2438 return phy_mii_ioctl(mp->phy, ifr, cmd);
2439
2440 return -EOPNOTSUPP;
2441 }
2442
2443 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2444 {
2445 struct mv643xx_eth_private *mp = netdev_priv(dev);
2446
2447 if (new_mtu < 64 || new_mtu > 9500)
2448 return -EINVAL;
2449
2450 dev->mtu = new_mtu;
2451 mv643xx_eth_recalc_skb_size(mp);
2452 tx_set_rate(mp, 1000000000, 16777216);
2453
2454 if (!netif_running(dev))
2455 return 0;
2456
2457 /*
2458 * Stop and then re-open the interface. This will allocate RX
2459 * skbs of the new MTU.
2460 * There is a possible danger that the open will not succeed,
2461 * due to memory being full.
2462 */
2463 mv643xx_eth_stop(dev);
2464 if (mv643xx_eth_open(dev)) {
2465 netdev_err(dev,
2466 "fatal error on re-opening device after MTU change\n");
2467 }
2468
2469 return 0;
2470 }
2471
2472 static void tx_timeout_task(struct work_struct *ugly)
2473 {
2474 struct mv643xx_eth_private *mp;
2475
2476 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2477 if (netif_running(mp->dev)) {
2478 netif_tx_stop_all_queues(mp->dev);
2479 port_reset(mp);
2480 port_start(mp);
2481 netif_tx_wake_all_queues(mp->dev);
2482 }
2483 }
2484
2485 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2486 {
2487 struct mv643xx_eth_private *mp = netdev_priv(dev);
2488
2489 netdev_info(dev, "tx timeout\n");
2490
2491 schedule_work(&mp->tx_timeout_task);
2492 }
2493
2494 #ifdef CONFIG_NET_POLL_CONTROLLER
2495 static void mv643xx_eth_netpoll(struct net_device *dev)
2496 {
2497 struct mv643xx_eth_private *mp = netdev_priv(dev);
2498
2499 wrlp(mp, INT_MASK, 0x00000000);
2500 rdlp(mp, INT_MASK);
2501
2502 mv643xx_eth_irq(dev->irq, dev);
2503
2504 wrlp(mp, INT_MASK, mp->int_mask);
2505 }
2506 #endif
2507
2508
2509 /* platform glue ************************************************************/
2510 static void
2511 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2512 struct mbus_dram_target_info *dram)
2513 {
2514 void __iomem *base = msp->base;
2515 u32 win_enable;
2516 u32 win_protect;
2517 int i;
2518
2519 for (i = 0; i < 6; i++) {
2520 writel(0, base + WINDOW_BASE(i));
2521 writel(0, base + WINDOW_SIZE(i));
2522 if (i < 4)
2523 writel(0, base + WINDOW_REMAP_HIGH(i));
2524 }
2525
2526 win_enable = 0x3f;
2527 win_protect = 0;
2528
2529 for (i = 0; i < dram->num_cs; i++) {
2530 struct mbus_dram_window *cs = dram->cs + i;
2531
2532 writel((cs->base & 0xffff0000) |
2533 (cs->mbus_attr << 8) |
2534 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2535 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2536
2537 win_enable &= ~(1 << i);
2538 win_protect |= 3 << (2 * i);
2539 }
2540
2541 writel(win_enable, base + WINDOW_BAR_ENABLE);
2542 msp->win_protect = win_protect;
2543 }
2544
2545 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2546 {
2547 /*
2548 * Check whether we have a 14-bit coal limit field in bits
2549 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2550 * SDMA config register.
2551 */
2552 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2553 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2554 msp->extended_rx_coal_limit = 1;
2555 else
2556 msp->extended_rx_coal_limit = 0;
2557
2558 /*
2559 * Check whether the MAC supports TX rate control, and if
2560 * yes, whether its associated registers are in the old or
2561 * the new place.
2562 */
2563 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2564 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2565 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2566 } else {
2567 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2568 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2569 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2570 else
2571 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2572 }
2573 }
2574
2575 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2576 {
2577 static int mv643xx_eth_version_printed;
2578 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2579 struct mv643xx_eth_shared_private *msp;
2580 struct resource *res;
2581 int ret;
2582
2583 if (!mv643xx_eth_version_printed++)
2584 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n",
2585 mv643xx_eth_driver_version);
2586
2587 ret = -EINVAL;
2588 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2589 if (res == NULL)
2590 goto out;
2591
2592 ret = -ENOMEM;
2593 msp = kzalloc(sizeof(*msp), GFP_KERNEL);
2594 if (msp == NULL)
2595 goto out;
2596
2597 msp->base = ioremap(res->start, resource_size(res));
2598 if (msp->base == NULL)
2599 goto out_free;
2600
2601 /*
2602 * Set up and register SMI bus.
2603 */
2604 if (pd == NULL || pd->shared_smi == NULL) {
2605 msp->smi_bus = mdiobus_alloc();
2606 if (msp->smi_bus == NULL)
2607 goto out_unmap;
2608
2609 msp->smi_bus->priv = msp;
2610 msp->smi_bus->name = "mv643xx_eth smi";
2611 msp->smi_bus->read = smi_bus_read;
2612 msp->smi_bus->write = smi_bus_write,
2613 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2614 msp->smi_bus->parent = &pdev->dev;
2615 msp->smi_bus->phy_mask = 0xffffffff;
2616 if (mdiobus_register(msp->smi_bus) < 0)
2617 goto out_free_mii_bus;
2618 msp->smi = msp;
2619 } else {
2620 msp->smi = platform_get_drvdata(pd->shared_smi);
2621 }
2622
2623 msp->err_interrupt = NO_IRQ;
2624 init_waitqueue_head(&msp->smi_busy_wait);
2625
2626 /*
2627 * Check whether the error interrupt is hooked up.
2628 */
2629 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2630 if (res != NULL) {
2631 int err;
2632
2633 err = request_irq(res->start, mv643xx_eth_err_irq,
2634 IRQF_SHARED, "mv643xx_eth", msp);
2635 if (!err) {
2636 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2637 msp->err_interrupt = res->start;
2638 }
2639 }
2640
2641 /*
2642 * (Re-)program MBUS remapping windows if we are asked to.
2643 */
2644 if (pd != NULL && pd->dram != NULL)
2645 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2646
2647 /*
2648 * Detect hardware parameters.
2649 */
2650 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2651 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
2652 pd->tx_csum_limit : 9 * 1024;
2653 infer_hw_params(msp);
2654
2655 platform_set_drvdata(pdev, msp);
2656
2657 return 0;
2658
2659 out_free_mii_bus:
2660 mdiobus_free(msp->smi_bus);
2661 out_unmap:
2662 iounmap(msp->base);
2663 out_free:
2664 kfree(msp);
2665 out:
2666 return ret;
2667 }
2668
2669 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2670 {
2671 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2672 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2673
2674 if (pd == NULL || pd->shared_smi == NULL) {
2675 mdiobus_unregister(msp->smi_bus);
2676 mdiobus_free(msp->smi_bus);
2677 }
2678 if (msp->err_interrupt != NO_IRQ)
2679 free_irq(msp->err_interrupt, msp);
2680 iounmap(msp->base);
2681 kfree(msp);
2682
2683 return 0;
2684 }
2685
2686 static struct platform_driver mv643xx_eth_shared_driver = {
2687 .probe = mv643xx_eth_shared_probe,
2688 .remove = mv643xx_eth_shared_remove,
2689 .driver = {
2690 .name = MV643XX_ETH_SHARED_NAME,
2691 .owner = THIS_MODULE,
2692 },
2693 };
2694
2695 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2696 {
2697 int addr_shift = 5 * mp->port_num;
2698 u32 data;
2699
2700 data = rdl(mp, PHY_ADDR);
2701 data &= ~(0x1f << addr_shift);
2702 data |= (phy_addr & 0x1f) << addr_shift;
2703 wrl(mp, PHY_ADDR, data);
2704 }
2705
2706 static int phy_addr_get(struct mv643xx_eth_private *mp)
2707 {
2708 unsigned int data;
2709
2710 data = rdl(mp, PHY_ADDR);
2711
2712 return (data >> (5 * mp->port_num)) & 0x1f;
2713 }
2714
2715 static void set_params(struct mv643xx_eth_private *mp,
2716 struct mv643xx_eth_platform_data *pd)
2717 {
2718 struct net_device *dev = mp->dev;
2719
2720 if (is_valid_ether_addr(pd->mac_addr))
2721 memcpy(dev->dev_addr, pd->mac_addr, 6);
2722 else
2723 uc_addr_get(mp, dev->dev_addr);
2724
2725 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2726 if (pd->rx_queue_size)
2727 mp->rx_ring_size = pd->rx_queue_size;
2728 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2729 mp->rx_desc_sram_size = pd->rx_sram_size;
2730
2731 mp->rxq_count = pd->rx_queue_count ? : 1;
2732
2733 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2734 if (pd->tx_queue_size)
2735 mp->tx_ring_size = pd->tx_queue_size;
2736 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2737 mp->tx_desc_sram_size = pd->tx_sram_size;
2738
2739 mp->txq_count = pd->tx_queue_count ? : 1;
2740 }
2741
2742 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2743 int phy_addr)
2744 {
2745 struct mii_bus *bus = mp->shared->smi->smi_bus;
2746 struct phy_device *phydev;
2747 int start;
2748 int num;
2749 int i;
2750
2751 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2752 start = phy_addr_get(mp) & 0x1f;
2753 num = 32;
2754 } else {
2755 start = phy_addr & 0x1f;
2756 num = 1;
2757 }
2758
2759 phydev = NULL;
2760 for (i = 0; i < num; i++) {
2761 int addr = (start + i) & 0x1f;
2762
2763 if (bus->phy_map[addr] == NULL)
2764 mdiobus_scan(bus, addr);
2765
2766 if (phydev == NULL) {
2767 phydev = bus->phy_map[addr];
2768 if (phydev != NULL)
2769 phy_addr_set(mp, addr);
2770 }
2771 }
2772
2773 return phydev;
2774 }
2775
2776 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2777 {
2778 struct phy_device *phy = mp->phy;
2779
2780 phy_reset(mp);
2781
2782 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2783
2784 if (speed == 0) {
2785 phy->autoneg = AUTONEG_ENABLE;
2786 phy->speed = 0;
2787 phy->duplex = 0;
2788 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2789 } else {
2790 phy->autoneg = AUTONEG_DISABLE;
2791 phy->advertising = 0;
2792 phy->speed = speed;
2793 phy->duplex = duplex;
2794 }
2795 phy_start_aneg(phy);
2796 }
2797
2798 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2799 {
2800 u32 pscr;
2801
2802 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2803 if (pscr & SERIAL_PORT_ENABLE) {
2804 pscr &= ~SERIAL_PORT_ENABLE;
2805 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2806 }
2807
2808 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2809 if (mp->phy == NULL) {
2810 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2811 if (speed == SPEED_1000)
2812 pscr |= SET_GMII_SPEED_TO_1000;
2813 else if (speed == SPEED_100)
2814 pscr |= SET_MII_SPEED_TO_100;
2815
2816 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2817
2818 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2819 if (duplex == DUPLEX_FULL)
2820 pscr |= SET_FULL_DUPLEX_MODE;
2821 }
2822
2823 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2824 }
2825
2826 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2827 .ndo_open = mv643xx_eth_open,
2828 .ndo_stop = mv643xx_eth_stop,
2829 .ndo_start_xmit = mv643xx_eth_xmit,
2830 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2831 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2832 .ndo_validate_addr = eth_validate_addr,
2833 .ndo_do_ioctl = mv643xx_eth_ioctl,
2834 .ndo_change_mtu = mv643xx_eth_change_mtu,
2835 .ndo_set_features = mv643xx_eth_set_features,
2836 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2837 .ndo_get_stats = mv643xx_eth_get_stats,
2838 #ifdef CONFIG_NET_POLL_CONTROLLER
2839 .ndo_poll_controller = mv643xx_eth_netpoll,
2840 #endif
2841 };
2842
2843 static int mv643xx_eth_probe(struct platform_device *pdev)
2844 {
2845 struct mv643xx_eth_platform_data *pd;
2846 struct mv643xx_eth_private *mp;
2847 struct net_device *dev;
2848 struct resource *res;
2849 int err;
2850
2851 pd = pdev->dev.platform_data;
2852 if (pd == NULL) {
2853 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n");
2854 return -ENODEV;
2855 }
2856
2857 if (pd->shared == NULL) {
2858 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n");
2859 return -ENODEV;
2860 }
2861
2862 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2863 if (!dev)
2864 return -ENOMEM;
2865
2866 mp = netdev_priv(dev);
2867 platform_set_drvdata(pdev, mp);
2868
2869 mp->shared = platform_get_drvdata(pd->shared);
2870 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2871 mp->port_num = pd->port_number;
2872
2873 mp->dev = dev;
2874
2875 set_params(mp, pd);
2876 netif_set_real_num_tx_queues(dev, mp->txq_count);
2877 netif_set_real_num_rx_queues(dev, mp->rxq_count);
2878
2879 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2880 mp->phy = phy_scan(mp, pd->phy_addr);
2881
2882 if (mp->phy != NULL)
2883 phy_init(mp, pd->speed, pd->duplex);
2884
2885 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2886
2887 init_pscr(mp, pd->speed, pd->duplex);
2888
2889
2890 mib_counters_clear(mp);
2891
2892 init_timer(&mp->mib_counters_timer);
2893 mp->mib_counters_timer.data = (unsigned long)mp;
2894 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2895 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2896 add_timer(&mp->mib_counters_timer);
2897
2898 spin_lock_init(&mp->mib_counters_lock);
2899
2900 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2901
2902 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2903
2904 init_timer(&mp->rx_oom);
2905 mp->rx_oom.data = (unsigned long)mp;
2906 mp->rx_oom.function = oom_timer_wrapper;
2907
2908
2909 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2910 BUG_ON(!res);
2911 dev->irq = res->start;
2912
2913 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2914
2915 dev->watchdog_timeo = 2 * HZ;
2916 dev->base_addr = 0;
2917
2918 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
2919 NETIF_F_RXCSUM | NETIF_F_LRO;
2920 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
2921 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2922
2923 dev->priv_flags |= IFF_UNICAST_FLT;
2924
2925 SET_NETDEV_DEV(dev, &pdev->dev);
2926
2927 if (mp->shared->win_protect)
2928 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2929
2930 netif_carrier_off(dev);
2931
2932 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2933
2934 set_rx_coal(mp, 250);
2935 set_tx_coal(mp, 0);
2936
2937 err = register_netdev(dev);
2938 if (err)
2939 goto out;
2940
2941 netdev_notice(dev, "port %d with MAC address %pM\n",
2942 mp->port_num, dev->dev_addr);
2943
2944 if (mp->tx_desc_sram_size > 0)
2945 netdev_notice(dev, "configured with sram\n");
2946
2947 return 0;
2948
2949 out:
2950 free_netdev(dev);
2951
2952 return err;
2953 }
2954
2955 static int mv643xx_eth_remove(struct platform_device *pdev)
2956 {
2957 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2958
2959 unregister_netdev(mp->dev);
2960 if (mp->phy != NULL)
2961 phy_detach(mp->phy);
2962 cancel_work_sync(&mp->tx_timeout_task);
2963 free_netdev(mp->dev);
2964
2965 platform_set_drvdata(pdev, NULL);
2966
2967 return 0;
2968 }
2969
2970 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2971 {
2972 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2973
2974 /* Mask all interrupts on ethernet port */
2975 wrlp(mp, INT_MASK, 0);
2976 rdlp(mp, INT_MASK);
2977
2978 if (netif_running(mp->dev))
2979 port_reset(mp);
2980 }
2981
2982 static struct platform_driver mv643xx_eth_driver = {
2983 .probe = mv643xx_eth_probe,
2984 .remove = mv643xx_eth_remove,
2985 .shutdown = mv643xx_eth_shutdown,
2986 .driver = {
2987 .name = MV643XX_ETH_NAME,
2988 .owner = THIS_MODULE,
2989 },
2990 };
2991
2992 static int __init mv643xx_eth_init_module(void)
2993 {
2994 int rc;
2995
2996 rc = platform_driver_register(&mv643xx_eth_shared_driver);
2997 if (!rc) {
2998 rc = platform_driver_register(&mv643xx_eth_driver);
2999 if (rc)
3000 platform_driver_unregister(&mv643xx_eth_shared_driver);
3001 }
3002
3003 return rc;
3004 }
3005 module_init(mv643xx_eth_init_module);
3006
3007 static void __exit mv643xx_eth_cleanup_module(void)
3008 {
3009 platform_driver_unregister(&mv643xx_eth_driver);
3010 platform_driver_unregister(&mv643xx_eth_shared_driver);
3011 }
3012 module_exit(mv643xx_eth_cleanup_module);
3013
3014 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3015 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3016 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3017 MODULE_LICENSE("GPL");
3018 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3019 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
Linux kernel - Deliverables
This page took 0.124299 seconds and 6 git commands to generate.