]> err.no Git - linux-2.6/blob - drivers/net/mv643xx_eth.c
mv643xx_eth: general cleanup
[linux-2.6] / drivers / net / mv643xx_eth.c
1 /*
2  * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports
3  * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com>
4  *
5  * Based on the 64360 driver from:
6  * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il>
7  *                    Rabeeh Khoury <rabeeh@marvell.com>
8  *
9  * Copyright (C) 2003 PMC-Sierra, Inc.,
10  *      written by Manish Lachwani
11  *
12  * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
13  *
14  * Copyright (C) 2004-2006 MontaVista Software, Inc.
15  *                         Dale Farnsworth <dale@farnsworth.org>
16  *
17  * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com>
18  *                                   <sjhill@realitydiluted.com>
19  *
20  * Copyright (C) 2007-2008 Marvell Semiconductor
21  *                         Lennert Buytenhek <buytenh@marvell.com>
22  *
23  * This program is free software; you can redistribute it and/or
24  * modify it under the terms of the GNU General Public License
25  * as published by the Free Software Foundation; either version 2
26  * of the License, or (at your option) any later version.
27  *
28  * This program is distributed in the hope that it will be useful,
29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
31  * GNU General Public License for more details.
32  *
33  * You should have received a copy of the GNU General Public License
34  * along with this program; if not, write to the Free Software
35  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
36  */
37
38 #include <linux/init.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/in.h>
41 #include <linux/tcp.h>
42 #include <linux/udp.h>
43 #include <linux/etherdevice.h>
44 #include <linux/delay.h>
45 #include <linux/ethtool.h>
46 #include <linux/platform_device.h>
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/spinlock.h>
50 #include <linux/workqueue.h>
51 #include <linux/mii.h>
52 #include <linux/mv643xx_eth.h>
53 #include <asm/io.h>
54 #include <asm/types.h>
55 #include <asm/system.h>
56
57 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
58 static char mv643xx_eth_driver_version[] = "1.0";
59
60 #define MV643XX_ETH_CHECKSUM_OFFLOAD_TX
61 #define MV643XX_ETH_NAPI
62 #define MV643XX_ETH_TX_FAST_REFILL
63
64 #ifdef MV643XX_ETH_CHECKSUM_OFFLOAD_TX
65 #define MAX_DESCS_PER_SKB       (MAX_SKB_FRAGS + 1)
66 #else
67 #define MAX_DESCS_PER_SKB       1
68 #endif
69
70 /*
71  * Registers shared between all ports.
72  */
73 #define PHY_ADDR                        0x0000
74 #define SMI_REG                         0x0004
75 #define WINDOW_BASE(w)                  (0x0200 + ((w) << 3))
76 #define WINDOW_SIZE(w)                  (0x0204 + ((w) << 3))
77 #define WINDOW_REMAP_HIGH(w)            (0x0280 + ((w) << 2))
78 #define WINDOW_BAR_ENABLE               0x0290
79 #define WINDOW_PROTECT(w)               (0x0294 + ((w) << 4))
80
81 /*
82  * Per-port registers.
83  */
84 #define PORT_CONFIG(p)                  (0x0400 + ((p) << 10))
85 #define  UNICAST_PROMISCUOUS_MODE       0x00000001
86 #define PORT_CONFIG_EXT(p)              (0x0404 + ((p) << 10))
87 #define MAC_ADDR_LOW(p)                 (0x0414 + ((p) << 10))
88 #define MAC_ADDR_HIGH(p)                (0x0418 + ((p) << 10))
89 #define SDMA_CONFIG(p)                  (0x041c + ((p) << 10))
90 #define PORT_SERIAL_CONTROL(p)          (0x043c + ((p) << 10))
91 #define PORT_STATUS(p)                  (0x0444 + ((p) << 10))
92 #define  TX_FIFO_EMPTY                  0x00000400
93 #define TXQ_COMMAND(p)                  (0x0448 + ((p) << 10))
94 #define TX_BW_MTU(p)                    (0x0458 + ((p) << 10))
95 #define INT_CAUSE(p)                    (0x0460 + ((p) << 10))
96 #define  INT_RX                         0x00000804
97 #define  INT_EXT                        0x00000002
98 #define INT_CAUSE_EXT(p)                (0x0464 + ((p) << 10))
99 #define  INT_EXT_LINK                   0x00100000
100 #define  INT_EXT_PHY                    0x00010000
101 #define  INT_EXT_TX_ERROR_0             0x00000100
102 #define  INT_EXT_TX_0                   0x00000001
103 #define  INT_EXT_TX                     0x00000101
104 #define INT_MASK(p)                     (0x0468 + ((p) << 10))
105 #define INT_MASK_EXT(p)                 (0x046c + ((p) << 10))
106 #define TX_FIFO_URGENT_THRESHOLD(p)     (0x0474 + ((p) << 10))
107 #define RXQ_CURRENT_DESC_PTR(p)         (0x060c + ((p) << 10))
108 #define RXQ_COMMAND(p)                  (0x0680 + ((p) << 10))
109 #define TXQ_CURRENT_DESC_PTR(p)         (0x06c0 + ((p) << 10))
110 #define MIB_COUNTERS(p)                 (0x1000 + ((p) << 7))
111 #define SPECIAL_MCAST_TABLE(p)          (0x1400 + ((p) << 10))
112 #define OTHER_MCAST_TABLE(p)            (0x1500 + ((p) << 10))
113 #define UNICAST_TABLE(p)                (0x1600 + ((p) << 10))
114
115
116 /*
117  * SDMA configuration register.
118  */
119 #define RX_BURST_SIZE_4_64BIT           (2 << 1)
120 #define BLM_RX_NO_SWAP                  (1 << 4)
121 #define BLM_TX_NO_SWAP                  (1 << 5)
122 #define TX_BURST_SIZE_4_64BIT           (2 << 22)
123
124 #if defined(__BIG_ENDIAN)
125 #define PORT_SDMA_CONFIG_DEFAULT_VALUE          \
126                 RX_BURST_SIZE_4_64BIT   |       \
127                 TX_BURST_SIZE_4_64BIT
128 #elif defined(__LITTLE_ENDIAN)
129 #define PORT_SDMA_CONFIG_DEFAULT_VALUE          \
130                 RX_BURST_SIZE_4_64BIT   |       \
131                 BLM_RX_NO_SWAP          |       \
132                 BLM_TX_NO_SWAP          |       \
133                 TX_BURST_SIZE_4_64BIT
134 #else
135 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
136 #endif
137
138
139 /*
140  * Port serial control register.
141  */
142 #define SET_MII_SPEED_TO_100                    (1 << 24)
143 #define SET_GMII_SPEED_TO_1000                  (1 << 23)
144 #define SET_FULL_DUPLEX_MODE                    (1 << 21)
145 #define MAX_RX_PACKET_1522BYTE                  (1 << 17)
146 #define MAX_RX_PACKET_9700BYTE                  (5 << 17)
147 #define MAX_RX_PACKET_MASK                      (7 << 17)
148 #define DISABLE_AUTO_NEG_SPEED_GMII             (1 << 13)
149 #define DO_NOT_FORCE_LINK_FAIL                  (1 << 10)
150 #define SERIAL_PORT_CONTROL_RESERVED            (1 << 9)
151 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL          (1 << 3)
152 #define DISABLE_AUTO_NEG_FOR_DUPLEX             (1 << 2)
153 #define FORCE_LINK_PASS                         (1 << 1)
154 #define SERIAL_PORT_ENABLE                      (1 << 0)
155
156 #define DEFAULT_RX_QUEUE_SIZE           400
157 #define DEFAULT_TX_QUEUE_SIZE           800
158
159
160 /*
161  * RX/TX descriptors.
162  */
163 #if defined(__BIG_ENDIAN)
164 struct rx_desc {
165         u16 byte_cnt;           /* Descriptor buffer byte count         */
166         u16 buf_size;           /* Buffer size                          */
167         u32 cmd_sts;            /* Descriptor command status            */
168         u32 next_desc_ptr;      /* Next descriptor pointer              */
169         u32 buf_ptr;            /* Descriptor buffer pointer            */
170 };
171
172 struct tx_desc {
173         u16 byte_cnt;           /* buffer byte count                    */
174         u16 l4i_chk;            /* CPU provided TCP checksum            */
175         u32 cmd_sts;            /* Command/status field                 */
176         u32 next_desc_ptr;      /* Pointer to next descriptor           */
177         u32 buf_ptr;            /* pointer to buffer for this descriptor*/
178 };
179 #elif defined(__LITTLE_ENDIAN)
180 struct rx_desc {
181         u32 cmd_sts;            /* Descriptor command status            */
182         u16 buf_size;           /* Buffer size                          */
183         u16 byte_cnt;           /* Descriptor buffer byte count         */
184         u32 buf_ptr;            /* Descriptor buffer pointer            */
185         u32 next_desc_ptr;      /* Next descriptor pointer              */
186 };
187
188 struct tx_desc {
189         u32 cmd_sts;            /* Command/status field                 */
190         u16 l4i_chk;            /* CPU provided TCP checksum            */
191         u16 byte_cnt;           /* buffer byte count                    */
192         u32 buf_ptr;            /* pointer to buffer for this descriptor*/
193         u32 next_desc_ptr;      /* Pointer to next descriptor           */
194 };
195 #else
196 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
197 #endif
198
199 /* RX & TX descriptor command */
200 #define BUFFER_OWNED_BY_DMA             0x80000000
201
202 /* RX & TX descriptor status */
203 #define ERROR_SUMMARY                   0x00000001
204
205 /* RX descriptor status */
206 #define LAYER_4_CHECKSUM_OK             0x40000000
207 #define RX_ENABLE_INTERRUPT             0x20000000
208 #define RX_FIRST_DESC                   0x08000000
209 #define RX_LAST_DESC                    0x04000000
210
211 /* TX descriptor command */
212 #define TX_ENABLE_INTERRUPT             0x00800000
213 #define GEN_CRC                         0x00400000
214 #define TX_FIRST_DESC                   0x00200000
215 #define TX_LAST_DESC                    0x00100000
216 #define ZERO_PADDING                    0x00080000
217 #define GEN_IP_V4_CHECKSUM              0x00040000
218 #define GEN_TCP_UDP_CHECKSUM            0x00020000
219 #define UDP_FRAME                       0x00010000
220
221 #define TX_IHL_SHIFT                    11
222
223
224 /* global *******************************************************************/
225 struct mv643xx_eth_shared_private {
226         /*
227          * Ethernet controller base address.
228          */
229         void __iomem *base;
230
231         /*
232          * Protects access to SMI_REG, which is shared between ports.
233          */
234         spinlock_t phy_lock;
235
236         /*
237          * Per-port MBUS window access register value.
238          */
239         u32 win_protect;
240
241         /*
242          * Hardware-specific parameters.
243          */
244         unsigned int t_clk;
245 };
246
247
248 /* per-port *****************************************************************/
249 struct mib_counters {
250         u64 good_octets_received;
251         u32 bad_octets_received;
252         u32 internal_mac_transmit_err;
253         u32 good_frames_received;
254         u32 bad_frames_received;
255         u32 broadcast_frames_received;
256         u32 multicast_frames_received;
257         u32 frames_64_octets;
258         u32 frames_65_to_127_octets;
259         u32 frames_128_to_255_octets;
260         u32 frames_256_to_511_octets;
261         u32 frames_512_to_1023_octets;
262         u32 frames_1024_to_max_octets;
263         u64 good_octets_sent;
264         u32 good_frames_sent;
265         u32 excessive_collision;
266         u32 multicast_frames_sent;
267         u32 broadcast_frames_sent;
268         u32 unrec_mac_control_received;
269         u32 fc_sent;
270         u32 good_fc_received;
271         u32 bad_fc_received;
272         u32 undersize_received;
273         u32 fragments_received;
274         u32 oversize_received;
275         u32 jabber_received;
276         u32 mac_receive_error;
277         u32 bad_crc_event;
278         u32 collision;
279         u32 late_collision;
280 };
281
282 struct rx_queue {
283         int rx_ring_size;
284
285         int rx_desc_count;
286         int rx_curr_desc;
287         int rx_used_desc;
288
289         struct rx_desc *rx_desc_area;
290         dma_addr_t rx_desc_dma;
291         int rx_desc_area_size;
292         struct sk_buff **rx_skb;
293
294         struct timer_list rx_oom;
295 };
296
297 struct tx_queue {
298         int tx_ring_size;
299
300         int tx_desc_count;
301         int tx_curr_desc;
302         int tx_used_desc;
303
304         struct tx_desc *tx_desc_area;
305         dma_addr_t tx_desc_dma;
306         int tx_desc_area_size;
307         struct sk_buff **tx_skb;
308 };
309
310 struct mv643xx_eth_private {
311         struct mv643xx_eth_shared_private *shared;
312         int port_num;
313
314         struct net_device *dev;
315
316         struct mv643xx_eth_shared_private *shared_smi;
317         int phy_addr;
318
319         spinlock_t lock;
320
321         struct mib_counters mib_counters;
322         struct work_struct tx_timeout_task;
323         struct mii_if_info mii;
324
325         /*
326          * RX state.
327          */
328         int default_rx_ring_size;
329         unsigned long rx_desc_sram_addr;
330         int rx_desc_sram_size;
331         struct napi_struct napi;
332         struct rx_queue rxq[1];
333
334         /*
335          * TX state.
336          */
337         int default_tx_ring_size;
338         unsigned long tx_desc_sram_addr;
339         int tx_desc_sram_size;
340         struct tx_queue txq[1];
341 #ifdef MV643XX_ETH_TX_FAST_REFILL
342         int tx_clean_threshold;
343 #endif
344 };
345
346
347 /* port register accessors **************************************************/
348 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
349 {
350         return readl(mp->shared->base + offset);
351 }
352
353 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
354 {
355         writel(data, mp->shared->base + offset);
356 }
357
358
359 /* rxq/txq helper functions *************************************************/
360 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
361 {
362         return container_of(rxq, struct mv643xx_eth_private, rxq[0]);
363 }
364
365 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
366 {
367         return container_of(txq, struct mv643xx_eth_private, txq[0]);
368 }
369
370 static void rxq_enable(struct rx_queue *rxq)
371 {
372         struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
373         wrl(mp, RXQ_COMMAND(mp->port_num), 1);
374 }
375
376 static void rxq_disable(struct rx_queue *rxq)
377 {
378         struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
379         u8 mask = 1;
380
381         wrl(mp, RXQ_COMMAND(mp->port_num), mask << 8);
382         while (rdl(mp, RXQ_COMMAND(mp->port_num)) & mask)
383                 udelay(10);
384 }
385
386 static void txq_enable(struct tx_queue *txq)
387 {
388         struct mv643xx_eth_private *mp = txq_to_mp(txq);
389         wrl(mp, TXQ_COMMAND(mp->port_num), 1);
390 }
391
392 static void txq_disable(struct tx_queue *txq)
393 {
394         struct mv643xx_eth_private *mp = txq_to_mp(txq);
395         u8 mask = 1;
396
397         wrl(mp, TXQ_COMMAND(mp->port_num), mask << 8);
398         while (rdl(mp, TXQ_COMMAND(mp->port_num)) & mask)
399                 udelay(10);
400 }
401
402 static void __txq_maybe_wake(struct tx_queue *txq)
403 {
404         struct mv643xx_eth_private *mp = txq_to_mp(txq);
405
406         if (txq->tx_ring_size - txq->tx_desc_count >= MAX_DESCS_PER_SKB)
407                 netif_wake_queue(mp->dev);
408 }
409
410
411 /* rx ***********************************************************************/
412 static void txq_reclaim(struct tx_queue *txq, int force);
413
414 static void rxq_refill(struct rx_queue *rxq)
415 {
416         struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
417         unsigned long flags;
418
419         spin_lock_irqsave(&mp->lock, flags);
420
421         while (rxq->rx_desc_count < rxq->rx_ring_size) {
422                 int skb_size;
423                 struct sk_buff *skb;
424                 int unaligned;
425                 int rx;
426
427                 /*
428                  * Reserve 2+14 bytes for an ethernet header (the
429                  * hardware automatically prepends 2 bytes of dummy
430                  * data to each received packet), 4 bytes for a VLAN
431                  * header, and 4 bytes for the trailing FCS -- 24
432                  * bytes total.
433                  */
434                 skb_size = mp->dev->mtu + 24;
435
436                 skb = dev_alloc_skb(skb_size + dma_get_cache_alignment() - 1);
437                 if (skb == NULL)
438                         break;
439
440                 unaligned = (u32)skb->data & (dma_get_cache_alignment() - 1);
441                 if (unaligned)
442                         skb_reserve(skb, dma_get_cache_alignment() - unaligned);
443
444                 rxq->rx_desc_count++;
445                 rx = rxq->rx_used_desc;
446                 rxq->rx_used_desc = (rx + 1) % rxq->rx_ring_size;
447
448                 rxq->rx_desc_area[rx].buf_ptr = dma_map_single(NULL, skb->data,
449                                                 skb_size, DMA_FROM_DEVICE);
450                 rxq->rx_desc_area[rx].buf_size = skb_size;
451                 rxq->rx_skb[rx] = skb;
452                 wmb();
453                 rxq->rx_desc_area[rx].cmd_sts = BUFFER_OWNED_BY_DMA |
454                                                 RX_ENABLE_INTERRUPT;
455                 wmb();
456
457                 /*
458                  * The hardware automatically prepends 2 bytes of
459                  * dummy data to each received packet, so that the
460                  * IP header ends up 16-byte aligned.
461                  */
462                 skb_reserve(skb, 2);
463         }
464
465         if (rxq->rx_desc_count == 0) {
466                 rxq->rx_oom.expires = jiffies + (HZ / 10);
467                 add_timer(&rxq->rx_oom);
468         }
469
470         spin_unlock_irqrestore(&mp->lock, flags);
471 }
472
473 static inline void rxq_refill_timer_wrapper(unsigned long data)
474 {
475         rxq_refill((struct rx_queue *)data);
476 }
477
478 static int rxq_process(struct rx_queue *rxq, int budget)
479 {
480         struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
481         struct net_device_stats *stats = &mp->dev->stats;
482         int rx;
483
484         rx = 0;
485         while (rx < budget) {
486                 struct rx_desc *rx_desc;
487                 unsigned int cmd_sts;
488                 struct sk_buff *skb;
489                 unsigned long flags;
490
491                 spin_lock_irqsave(&mp->lock, flags);
492
493                 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
494
495                 cmd_sts = rx_desc->cmd_sts;
496                 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
497                         spin_unlock_irqrestore(&mp->lock, flags);
498                         break;
499                 }
500                 rmb();
501
502                 skb = rxq->rx_skb[rxq->rx_curr_desc];
503                 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
504
505                 rxq->rx_curr_desc = (rxq->rx_curr_desc + 1) % rxq->rx_ring_size;
506
507                 spin_unlock_irqrestore(&mp->lock, flags);
508
509                 dma_unmap_single(NULL, rx_desc->buf_ptr + 2,
510                                  mp->dev->mtu + 24, DMA_FROM_DEVICE);
511                 rxq->rx_desc_count--;
512                 rx++;
513
514                 /*
515                  * Update statistics.
516                  *
517                  * Note that the descriptor byte count includes 2 dummy
518                  * bytes automatically inserted by the hardware at the
519                  * start of the packet (which we don't count), and a 4
520                  * byte CRC at the end of the packet (which we do count).
521                  */
522                 stats->rx_packets++;
523                 stats->rx_bytes += rx_desc->byte_cnt - 2;
524
525                 /*
526                  * In case we received a packet without first / last bits
527                  * on, or the error summary bit is set, the packet needs
528                  * to be dropped.
529                  */
530                 if (((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
531                                         (RX_FIRST_DESC | RX_LAST_DESC))
532                                 || (cmd_sts & ERROR_SUMMARY)) {
533                         stats->rx_dropped++;
534
535                         if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
536                                 (RX_FIRST_DESC | RX_LAST_DESC)) {
537                                 if (net_ratelimit())
538                                         dev_printk(KERN_ERR, &mp->dev->dev,
539                                                    "received packet spanning "
540                                                    "multiple descriptors\n");
541                         }
542
543                         if (cmd_sts & ERROR_SUMMARY)
544                                 stats->rx_errors++;
545
546                         dev_kfree_skb_irq(skb);
547                 } else {
548                         /*
549                          * The -4 is for the CRC in the trailer of the
550                          * received packet
551                          */
552                         skb_put(skb, rx_desc->byte_cnt - 2 - 4);
553
554                         if (cmd_sts & LAYER_4_CHECKSUM_OK) {
555                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
556                                 skb->csum = htons(
557                                         (cmd_sts & 0x0007fff8) >> 3);
558                         }
559                         skb->protocol = eth_type_trans(skb, mp->dev);
560 #ifdef MV643XX_ETH_NAPI
561                         netif_receive_skb(skb);
562 #else
563                         netif_rx(skb);
564 #endif
565                 }
566
567                 mp->dev->last_rx = jiffies;
568         }
569
570         rxq_refill(rxq);
571
572         return rx;
573 }
574
575 #ifdef MV643XX_ETH_NAPI
576 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
577 {
578         struct mv643xx_eth_private *mp;
579         int rx;
580
581         mp = container_of(napi, struct mv643xx_eth_private, napi);
582
583 #ifdef MV643XX_ETH_TX_FAST_REFILL
584         if (++mp->tx_clean_threshold > 5) {
585                 txq_reclaim(mp->txq, 0);
586                 mp->tx_clean_threshold = 0;
587         }
588 #endif
589
590         rx = rxq_process(mp->rxq, budget);
591
592         if (rx < budget) {
593                 netif_rx_complete(mp->dev, napi);
594                 wrl(mp, INT_CAUSE(mp->port_num), 0);
595                 wrl(mp, INT_CAUSE_EXT(mp->port_num), 0);
596                 wrl(mp, INT_MASK(mp->port_num), INT_RX | INT_EXT);
597         }
598
599         return rx;
600 }
601 #endif
602
603
604 /* tx ***********************************************************************/
605 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
606 {
607         int frag;
608
609         for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
610                 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
611                 if (fragp->size <= 8 && fragp->page_offset & 7)
612                         return 1;
613         }
614
615         return 0;
616 }
617
618 static int txq_alloc_desc_index(struct tx_queue *txq)
619 {
620         int tx_desc_curr;
621
622         BUG_ON(txq->tx_desc_count >= txq->tx_ring_size);
623
624         tx_desc_curr = txq->tx_curr_desc;
625         txq->tx_curr_desc = (tx_desc_curr + 1) % txq->tx_ring_size;
626
627         BUG_ON(txq->tx_curr_desc == txq->tx_used_desc);
628
629         return tx_desc_curr;
630 }
631
632 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
633 {
634         int nr_frags = skb_shinfo(skb)->nr_frags;
635         int frag;
636
637         for (frag = 0; frag < nr_frags; frag++) {
638                 skb_frag_t *this_frag;
639                 int tx_index;
640                 struct tx_desc *desc;
641
642                 this_frag = &skb_shinfo(skb)->frags[frag];
643                 tx_index = txq_alloc_desc_index(txq);
644                 desc = &txq->tx_desc_area[tx_index];
645
646                 /*
647                  * The last fragment will generate an interrupt
648                  * which will free the skb on TX completion.
649                  */
650                 if (frag == nr_frags - 1) {
651                         desc->cmd_sts = BUFFER_OWNED_BY_DMA |
652                                         ZERO_PADDING | TX_LAST_DESC |
653                                         TX_ENABLE_INTERRUPT;
654                         txq->tx_skb[tx_index] = skb;
655                 } else {
656                         desc->cmd_sts = BUFFER_OWNED_BY_DMA;
657                         txq->tx_skb[tx_index] = NULL;
658                 }
659
660                 desc->l4i_chk = 0;
661                 desc->byte_cnt = this_frag->size;
662                 desc->buf_ptr = dma_map_page(NULL, this_frag->page,
663                                                 this_frag->page_offset,
664                                                 this_frag->size,
665                                                 DMA_TO_DEVICE);
666         }
667 }
668
669 static inline __be16 sum16_as_be(__sum16 sum)
670 {
671         return (__force __be16)sum;
672 }
673
674 static void txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
675 {
676         int nr_frags = skb_shinfo(skb)->nr_frags;
677         int tx_index;
678         struct tx_desc *desc;
679         u32 cmd_sts;
680         int length;
681
682         cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
683
684         tx_index = txq_alloc_desc_index(txq);
685         desc = &txq->tx_desc_area[tx_index];
686
687         if (nr_frags) {
688                 txq_submit_frag_skb(txq, skb);
689
690                 length = skb_headlen(skb);
691                 txq->tx_skb[tx_index] = NULL;
692         } else {
693                 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
694                 length = skb->len;
695                 txq->tx_skb[tx_index] = skb;
696         }
697
698         desc->byte_cnt = length;
699         desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE);
700
701         if (skb->ip_summed == CHECKSUM_PARTIAL) {
702                 BUG_ON(skb->protocol != htons(ETH_P_IP));
703
704                 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
705                            GEN_IP_V4_CHECKSUM   |
706                            ip_hdr(skb)->ihl << TX_IHL_SHIFT;
707
708                 switch (ip_hdr(skb)->protocol) {
709                 case IPPROTO_UDP:
710                         cmd_sts |= UDP_FRAME;
711                         desc->l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
712                         break;
713                 case IPPROTO_TCP:
714                         desc->l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
715                         break;
716                 default:
717                         BUG();
718                 }
719         } else {
720                 /* Errata BTS #50, IHL must be 5 if no HW checksum */
721                 cmd_sts |= 5 << TX_IHL_SHIFT;
722                 desc->l4i_chk = 0;
723         }
724
725         /* ensure all other descriptors are written before first cmd_sts */
726         wmb();
727         desc->cmd_sts = cmd_sts;
728
729         /* ensure all descriptors are written before poking hardware */
730         wmb();
731         txq_enable(txq);
732
733         txq->tx_desc_count += nr_frags + 1;
734 }
735
736 static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
737 {
738         struct mv643xx_eth_private *mp = netdev_priv(dev);
739         struct net_device_stats *stats = &dev->stats;
740         struct tx_queue *txq;
741         unsigned long flags;
742
743         BUG_ON(netif_queue_stopped(dev));
744
745         if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
746                 stats->tx_dropped++;
747                 dev_printk(KERN_DEBUG, &dev->dev,
748                            "failed to linearize skb with tiny "
749                            "unaligned fragment\n");
750                 return NETDEV_TX_BUSY;
751         }
752
753         spin_lock_irqsave(&mp->lock, flags);
754
755         txq = mp->txq;
756
757         if (txq->tx_ring_size - txq->tx_desc_count < MAX_DESCS_PER_SKB) {
758                 printk(KERN_ERR "%s: transmit with queue full\n", dev->name);
759                 netif_stop_queue(dev);
760                 spin_unlock_irqrestore(&mp->lock, flags);
761                 return NETDEV_TX_BUSY;
762         }
763
764         txq_submit_skb(txq, skb);
765         stats->tx_bytes += skb->len;
766         stats->tx_packets++;
767         dev->trans_start = jiffies;
768
769         if (txq->tx_ring_size - txq->tx_desc_count < MAX_DESCS_PER_SKB)
770                 netif_stop_queue(dev);
771
772         spin_unlock_irqrestore(&mp->lock, flags);
773
774         return NETDEV_TX_OK;
775 }
776
777
778 /* mii management interface *************************************************/
779 #define SMI_BUSY                0x10000000
780 #define SMI_READ_VALID          0x08000000
781 #define SMI_OPCODE_READ         0x04000000
782 #define SMI_OPCODE_WRITE        0x00000000
783
784 static void smi_reg_read(struct mv643xx_eth_private *mp, unsigned int addr,
785                          unsigned int reg, unsigned int *value)
786 {
787         void __iomem *smi_reg = mp->shared_smi->base + SMI_REG;
788         unsigned long flags;
789         int i;
790
791         /* the SMI register is a shared resource */
792         spin_lock_irqsave(&mp->shared_smi->phy_lock, flags);
793
794         /* wait for the SMI register to become available */
795         for (i = 0; readl(smi_reg) & SMI_BUSY; i++) {
796                 if (i == 1000) {
797                         printk("%s: PHY busy timeout\n", mp->dev->name);
798                         goto out;
799                 }
800                 udelay(10);
801         }
802
803         writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
804
805         /* now wait for the data to be valid */
806         for (i = 0; !(readl(smi_reg) & SMI_READ_VALID); i++) {
807                 if (i == 1000) {
808                         printk("%s: PHY read timeout\n", mp->dev->name);
809                         goto out;
810                 }
811                 udelay(10);
812         }
813
814         *value = readl(smi_reg) & 0xffff;
815 out:
816         spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags);
817 }
818
819 static void smi_reg_write(struct mv643xx_eth_private *mp,
820                           unsigned int addr,
821                           unsigned int reg, unsigned int value)
822 {
823         void __iomem *smi_reg = mp->shared_smi->base + SMI_REG;
824         unsigned long flags;
825         int i;
826
827         /* the SMI register is a shared resource */
828         spin_lock_irqsave(&mp->shared_smi->phy_lock, flags);
829
830         /* wait for the SMI register to become available */
831         for (i = 0; readl(smi_reg) & SMI_BUSY; i++) {
832                 if (i == 1000) {
833                         printk("%s: PHY busy timeout\n", mp->dev->name);
834                         goto out;
835                 }
836                 udelay(10);
837         }
838
839         writel(SMI_OPCODE_WRITE | (reg << 21) |
840                 (addr << 16) | (value & 0xffff), smi_reg);
841 out:
842         spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags);
843 }
844
845
846 /* mib counters *************************************************************/
847 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
848 {
849         return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
850 }
851
852 static void mib_counters_clear(struct mv643xx_eth_private *mp)
853 {
854         int i;
855
856         for (i = 0; i < 0x80; i += 4)
857                 mib_read(mp, i);
858 }
859
860 static void mib_counters_update(struct mv643xx_eth_private *mp)
861 {
862         struct mib_counters *p = &mp->mib_counters;
863
864         p->good_octets_received += mib_read(mp, 0x00);
865         p->good_octets_received += (u64)mib_read(mp, 0x04) << 32;
866         p->bad_octets_received += mib_read(mp, 0x08);
867         p->internal_mac_transmit_err += mib_read(mp, 0x0c);
868         p->good_frames_received += mib_read(mp, 0x10);
869         p->bad_frames_received += mib_read(mp, 0x14);
870         p->broadcast_frames_received += mib_read(mp, 0x18);
871         p->multicast_frames_received += mib_read(mp, 0x1c);
872         p->frames_64_octets += mib_read(mp, 0x20);
873         p->frames_65_to_127_octets += mib_read(mp, 0x24);
874         p->frames_128_to_255_octets += mib_read(mp, 0x28);
875         p->frames_256_to_511_octets += mib_read(mp, 0x2c);
876         p->frames_512_to_1023_octets += mib_read(mp, 0x30);
877         p->frames_1024_to_max_octets += mib_read(mp, 0x34);
878         p->good_octets_sent += mib_read(mp, 0x38);
879         p->good_octets_sent += (u64)mib_read(mp, 0x3c) << 32;
880         p->good_frames_sent += mib_read(mp, 0x40);
881         p->excessive_collision += mib_read(mp, 0x44);
882         p->multicast_frames_sent += mib_read(mp, 0x48);
883         p->broadcast_frames_sent += mib_read(mp, 0x4c);
884         p->unrec_mac_control_received += mib_read(mp, 0x50);
885         p->fc_sent += mib_read(mp, 0x54);
886         p->good_fc_received += mib_read(mp, 0x58);
887         p->bad_fc_received += mib_read(mp, 0x5c);
888         p->undersize_received += mib_read(mp, 0x60);
889         p->fragments_received += mib_read(mp, 0x64);
890         p->oversize_received += mib_read(mp, 0x68);
891         p->jabber_received += mib_read(mp, 0x6c);
892         p->mac_receive_error += mib_read(mp, 0x70);
893         p->bad_crc_event += mib_read(mp, 0x74);
894         p->collision += mib_read(mp, 0x78);
895         p->late_collision += mib_read(mp, 0x7c);
896 }
897
898
899 /* ethtool ******************************************************************/
900 struct mv643xx_eth_stats {
901         char stat_string[ETH_GSTRING_LEN];
902         int sizeof_stat;
903         int netdev_off;
904         int mp_off;
905 };
906
907 #define SSTAT(m)                                                \
908         { #m, FIELD_SIZEOF(struct net_device_stats, m),         \
909           offsetof(struct net_device, stats.m), -1 }
910
911 #define MIBSTAT(m)                                              \
912         { #m, FIELD_SIZEOF(struct mib_counters, m),             \
913           -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
914
915 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
916         SSTAT(rx_packets),
917         SSTAT(tx_packets),
918         SSTAT(rx_bytes),
919         SSTAT(tx_bytes),
920         SSTAT(rx_errors),
921         SSTAT(tx_errors),
922         SSTAT(rx_dropped),
923         SSTAT(tx_dropped),
924         MIBSTAT(good_octets_received),
925         MIBSTAT(bad_octets_received),
926         MIBSTAT(internal_mac_transmit_err),
927         MIBSTAT(good_frames_received),
928         MIBSTAT(bad_frames_received),
929         MIBSTAT(broadcast_frames_received),
930         MIBSTAT(multicast_frames_received),
931         MIBSTAT(frames_64_octets),
932         MIBSTAT(frames_65_to_127_octets),
933         MIBSTAT(frames_128_to_255_octets),
934         MIBSTAT(frames_256_to_511_octets),
935         MIBSTAT(frames_512_to_1023_octets),
936         MIBSTAT(frames_1024_to_max_octets),
937         MIBSTAT(good_octets_sent),
938         MIBSTAT(good_frames_sent),
939         MIBSTAT(excessive_collision),
940         MIBSTAT(multicast_frames_sent),
941         MIBSTAT(broadcast_frames_sent),
942         MIBSTAT(unrec_mac_control_received),
943         MIBSTAT(fc_sent),
944         MIBSTAT(good_fc_received),
945         MIBSTAT(bad_fc_received),
946         MIBSTAT(undersize_received),
947         MIBSTAT(fragments_received),
948         MIBSTAT(oversize_received),
949         MIBSTAT(jabber_received),
950         MIBSTAT(mac_receive_error),
951         MIBSTAT(bad_crc_event),
952         MIBSTAT(collision),
953         MIBSTAT(late_collision),
954 };
955
956 static int mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
957 {
958         struct mv643xx_eth_private *mp = netdev_priv(dev);
959         int err;
960
961         spin_lock_irq(&mp->lock);
962         err = mii_ethtool_gset(&mp->mii, cmd);
963         spin_unlock_irq(&mp->lock);
964
965         /*
966          * The MAC does not support 1000baseT_Half.
967          */
968         cmd->supported &= ~SUPPORTED_1000baseT_Half;
969         cmd->advertising &= ~ADVERTISED_1000baseT_Half;
970
971         return err;
972 }
973
974 static int mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
975 {
976         struct mv643xx_eth_private *mp = netdev_priv(dev);
977         int err;
978
979         /*
980          * The MAC does not support 1000baseT_Half.
981          */
982         cmd->advertising &= ~ADVERTISED_1000baseT_Half;
983
984         spin_lock_irq(&mp->lock);
985         err = mii_ethtool_sset(&mp->mii, cmd);
986         spin_unlock_irq(&mp->lock);
987
988         return err;
989 }
990
991 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
992                                     struct ethtool_drvinfo *drvinfo)
993 {
994         strncpy(drvinfo->driver,  mv643xx_eth_driver_name, 32);
995         strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
996         strncpy(drvinfo->fw_version, "N/A", 32);
997         strncpy(drvinfo->bus_info, "platform", 32);
998         drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
999 }
1000
1001 static int mv643xx_eth_nway_reset(struct net_device *dev)
1002 {
1003         struct mv643xx_eth_private *mp = netdev_priv(dev);
1004
1005         return mii_nway_restart(&mp->mii);
1006 }
1007
1008 static u32 mv643xx_eth_get_link(struct net_device *dev)
1009 {
1010         struct mv643xx_eth_private *mp = netdev_priv(dev);
1011
1012         return mii_link_ok(&mp->mii);
1013 }
1014
1015 static void mv643xx_eth_get_strings(struct net_device *dev,
1016                                     uint32_t stringset, uint8_t *data)
1017 {
1018         int i;
1019
1020         if (stringset == ETH_SS_STATS) {
1021                 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1022                         memcpy(data + i * ETH_GSTRING_LEN,
1023                                 mv643xx_eth_stats[i].stat_string,
1024                                 ETH_GSTRING_LEN);
1025                 }
1026         }
1027 }
1028
1029 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1030                                           struct ethtool_stats *stats,
1031                                           uint64_t *data)
1032 {
1033         struct mv643xx_eth_private *mp = dev->priv;
1034         int i;
1035
1036         mib_counters_update(mp);
1037
1038         for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1039                 const struct mv643xx_eth_stats *stat;
1040                 void *p;
1041
1042                 stat = mv643xx_eth_stats + i;
1043
1044                 if (stat->netdev_off >= 0)
1045                         p = ((void *)mp->dev) + stat->netdev_off;
1046                 else
1047                         p = ((void *)mp) + stat->mp_off;
1048
1049                 data[i] = (stat->sizeof_stat == 8) ?
1050                                 *(uint64_t *)p : *(uint32_t *)p;
1051         }
1052 }
1053
1054 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1055 {
1056         if (sset == ETH_SS_STATS)
1057                 return ARRAY_SIZE(mv643xx_eth_stats);
1058
1059         return -EOPNOTSUPP;
1060 }
1061
1062 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1063         .get_settings           = mv643xx_eth_get_settings,
1064         .set_settings           = mv643xx_eth_set_settings,
1065         .get_drvinfo            = mv643xx_eth_get_drvinfo,
1066         .nway_reset             = mv643xx_eth_nway_reset,
1067         .get_link               = mv643xx_eth_get_link,
1068         .set_sg                 = ethtool_op_set_sg,
1069         .get_strings            = mv643xx_eth_get_strings,
1070         .get_ethtool_stats      = mv643xx_eth_get_ethtool_stats,
1071         .get_sset_count         = mv643xx_eth_get_sset_count,
1072 };
1073
1074
1075 /* address handling *********************************************************/
1076 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1077 {
1078         unsigned int mac_h;
1079         unsigned int mac_l;
1080
1081         mac_h = rdl(mp, MAC_ADDR_HIGH(mp->port_num));
1082         mac_l = rdl(mp, MAC_ADDR_LOW(mp->port_num));
1083
1084         addr[0] = (mac_h >> 24) & 0xff;
1085         addr[1] = (mac_h >> 16) & 0xff;
1086         addr[2] = (mac_h >> 8) & 0xff;
1087         addr[3] = mac_h & 0xff;
1088         addr[4] = (mac_l >> 8) & 0xff;
1089         addr[5] = mac_l & 0xff;
1090 }
1091
1092 static void init_mac_tables(struct mv643xx_eth_private *mp)
1093 {
1094         int i;
1095
1096         for (i = 0; i < 0x100; i += 4) {
1097                 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, 0);
1098                 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, 0);
1099         }
1100
1101         for (i = 0; i < 0x10; i += 4)
1102                 wrl(mp, UNICAST_TABLE(mp->port_num) + i, 0);
1103 }
1104
1105 static void set_filter_table_entry(struct mv643xx_eth_private *mp,
1106                                    int table, unsigned char entry)
1107 {
1108         unsigned int table_reg;
1109
1110         /* Set "accepts frame bit" at specified table entry */
1111         table_reg = rdl(mp, table + (entry & 0xfc));
1112         table_reg |= 0x01 << (8 * (entry & 3));
1113         wrl(mp, table + (entry & 0xfc), table_reg);
1114 }
1115
1116 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1117 {
1118         unsigned int mac_h;
1119         unsigned int mac_l;
1120         int table;
1121
1122         mac_l = (addr[4] << 8) | addr[5];
1123         mac_h = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1124
1125         wrl(mp, MAC_ADDR_LOW(mp->port_num), mac_l);
1126         wrl(mp, MAC_ADDR_HIGH(mp->port_num), mac_h);
1127
1128         table = UNICAST_TABLE(mp->port_num);
1129         set_filter_table_entry(mp, table, addr[5] & 0x0f);
1130 }
1131
1132 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1133 {
1134         struct mv643xx_eth_private *mp = netdev_priv(dev);
1135
1136         /* +2 is for the offset of the HW addr type */
1137         memcpy(dev->dev_addr, addr + 2, 6);
1138
1139         init_mac_tables(mp);
1140         uc_addr_set(mp, dev->dev_addr);
1141
1142         return 0;
1143 }
1144
1145 static int addr_crc(unsigned char *addr)
1146 {
1147         int crc = 0;
1148         int i;
1149
1150         for (i = 0; i < 6; i++) {
1151                 int j;
1152
1153                 crc = (crc ^ addr[i]) << 8;
1154                 for (j = 7; j >= 0; j--) {
1155                         if (crc & (0x100 << j))
1156                                 crc ^= 0x107 << j;
1157                 }
1158         }
1159
1160         return crc;
1161 }
1162
1163 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1164 {
1165         struct mv643xx_eth_private *mp = netdev_priv(dev);
1166         u32 port_config;
1167         struct dev_addr_list *addr;
1168         int i;
1169
1170         port_config = rdl(mp, PORT_CONFIG(mp->port_num));
1171         if (dev->flags & IFF_PROMISC)
1172                 port_config |= UNICAST_PROMISCUOUS_MODE;
1173         else
1174                 port_config &= ~UNICAST_PROMISCUOUS_MODE;
1175         wrl(mp, PORT_CONFIG(mp->port_num), port_config);
1176
1177         if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1178                 int port_num = mp->port_num;
1179                 u32 accept = 0x01010101;
1180
1181                 for (i = 0; i < 0x100; i += 4) {
1182                         wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1183                         wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1184                 }
1185                 return;
1186         }
1187
1188         for (i = 0; i < 0x100; i += 4) {
1189                 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, 0);
1190                 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, 0);
1191         }
1192
1193         for (addr = dev->mc_list; addr != NULL; addr = addr->next) {
1194                 u8 *a = addr->da_addr;
1195                 int table;
1196
1197                 if (addr->da_addrlen != 6)
1198                         continue;
1199
1200                 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1201                         table = SPECIAL_MCAST_TABLE(mp->port_num);
1202                         set_filter_table_entry(mp, table, a[5]);
1203                 } else {
1204                         int crc = addr_crc(a);
1205
1206                         table = OTHER_MCAST_TABLE(mp->port_num);
1207                         set_filter_table_entry(mp, table, crc);
1208                 }
1209         }
1210 }
1211
1212
1213 /* rx/tx queue initialisation ***********************************************/
1214 static int rxq_init(struct mv643xx_eth_private *mp)
1215 {
1216         struct rx_queue *rxq = mp->rxq;
1217         struct rx_desc *rx_desc;
1218         int size;
1219         int i;
1220
1221         rxq->rx_ring_size = mp->default_rx_ring_size;
1222
1223         rxq->rx_desc_count = 0;
1224         rxq->rx_curr_desc = 0;
1225         rxq->rx_used_desc = 0;
1226
1227         size = rxq->rx_ring_size * sizeof(struct rx_desc);
1228
1229         if (size <= mp->rx_desc_sram_size) {
1230                 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1231                                                 mp->rx_desc_sram_size);
1232                 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1233         } else {
1234                 rxq->rx_desc_area = dma_alloc_coherent(NULL, size,
1235                                                         &rxq->rx_desc_dma,
1236                                                         GFP_KERNEL);
1237         }
1238
1239         if (rxq->rx_desc_area == NULL) {
1240                 dev_printk(KERN_ERR, &mp->dev->dev,
1241                            "can't allocate rx ring (%d bytes)\n", size);
1242                 goto out;
1243         }
1244         memset(rxq->rx_desc_area, 0, size);
1245
1246         rxq->rx_desc_area_size = size;
1247         rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1248                                                                 GFP_KERNEL);
1249         if (rxq->rx_skb == NULL) {
1250                 dev_printk(KERN_ERR, &mp->dev->dev,
1251                            "can't allocate rx skb ring\n");
1252                 goto out_free;
1253         }
1254
1255         rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1256         for (i = 0; i < rxq->rx_ring_size; i++) {
1257                 int nexti = (i + 1) % rxq->rx_ring_size;
1258                 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1259                                         nexti * sizeof(struct rx_desc);
1260         }
1261
1262         init_timer(&rxq->rx_oom);
1263         rxq->rx_oom.data = (unsigned long)rxq;
1264         rxq->rx_oom.function = rxq_refill_timer_wrapper;
1265
1266         return 0;
1267
1268
1269 out_free:
1270         if (size <= mp->rx_desc_sram_size)
1271                 iounmap(rxq->rx_desc_area);
1272         else
1273                 dma_free_coherent(NULL, size,
1274                                   rxq->rx_desc_area,
1275                                   rxq->rx_desc_dma);
1276
1277 out:
1278         return -ENOMEM;
1279 }
1280
1281 static void rxq_deinit(struct rx_queue *rxq)
1282 {
1283         struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1284         int i;
1285
1286         rxq_disable(rxq);
1287
1288         del_timer_sync(&rxq->rx_oom);
1289
1290         for (i = 0; i < rxq->rx_ring_size; i++) {
1291                 if (rxq->rx_skb[i]) {
1292                         dev_kfree_skb(rxq->rx_skb[i]);
1293                         rxq->rx_desc_count--;
1294                 }
1295         }
1296
1297         if (rxq->rx_desc_count) {
1298                 dev_printk(KERN_ERR, &mp->dev->dev,
1299                            "error freeing rx ring -- %d skbs stuck\n",
1300                            rxq->rx_desc_count);
1301         }
1302
1303         if (rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1304                 iounmap(rxq->rx_desc_area);
1305         else
1306                 dma_free_coherent(NULL, rxq->rx_desc_area_size,
1307                                   rxq->rx_desc_area, rxq->rx_desc_dma);
1308
1309         kfree(rxq->rx_skb);
1310 }
1311
1312 static int txq_init(struct mv643xx_eth_private *mp)
1313 {
1314         struct tx_queue *txq = mp->txq;
1315         struct tx_desc *tx_desc;
1316         int size;
1317         int i;
1318
1319         txq->tx_ring_size = mp->default_tx_ring_size;
1320
1321         txq->tx_desc_count = 0;
1322         txq->tx_curr_desc = 0;
1323         txq->tx_used_desc = 0;
1324
1325         size = txq->tx_ring_size * sizeof(struct tx_desc);
1326
1327         if (size <= mp->tx_desc_sram_size) {
1328                 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
1329                                                 mp->tx_desc_sram_size);
1330                 txq->tx_desc_dma = mp->tx_desc_sram_addr;
1331         } else {
1332                 txq->tx_desc_area = dma_alloc_coherent(NULL, size,
1333                                                         &txq->tx_desc_dma,
1334                                                         GFP_KERNEL);
1335         }
1336
1337         if (txq->tx_desc_area == NULL) {
1338                 dev_printk(KERN_ERR, &mp->dev->dev,
1339                            "can't allocate tx ring (%d bytes)\n", size);
1340                 goto out;
1341         }
1342         memset(txq->tx_desc_area, 0, size);
1343
1344         txq->tx_desc_area_size = size;
1345         txq->tx_skb = kmalloc(txq->tx_ring_size * sizeof(*txq->tx_skb),
1346                                                                 GFP_KERNEL);
1347         if (txq->tx_skb == NULL) {
1348                 dev_printk(KERN_ERR, &mp->dev->dev,
1349                            "can't allocate tx skb ring\n");
1350                 goto out_free;
1351         }
1352
1353         tx_desc = (struct tx_desc *)txq->tx_desc_area;
1354         for (i = 0; i < txq->tx_ring_size; i++) {
1355                 int nexti = (i + 1) % txq->tx_ring_size;
1356                 tx_desc[i].next_desc_ptr = txq->tx_desc_dma +
1357                                         nexti * sizeof(struct tx_desc);
1358         }
1359
1360         return 0;
1361
1362
1363 out_free:
1364         if (size <= mp->tx_desc_sram_size)
1365                 iounmap(txq->tx_desc_area);
1366         else
1367                 dma_free_coherent(NULL, size,
1368                                   txq->tx_desc_area,
1369                                   txq->tx_desc_dma);
1370
1371 out:
1372         return -ENOMEM;
1373 }
1374
1375 static void txq_reclaim(struct tx_queue *txq, int force)
1376 {
1377         struct mv643xx_eth_private *mp = txq_to_mp(txq);
1378         unsigned long flags;
1379
1380         spin_lock_irqsave(&mp->lock, flags);
1381         while (txq->tx_desc_count > 0) {
1382                 int tx_index;
1383                 struct tx_desc *desc;
1384                 u32 cmd_sts;
1385                 struct sk_buff *skb;
1386                 dma_addr_t addr;
1387                 int count;
1388
1389                 tx_index = txq->tx_used_desc;
1390                 desc = &txq->tx_desc_area[tx_index];
1391                 cmd_sts = desc->cmd_sts;
1392
1393                 if (!force && (cmd_sts & BUFFER_OWNED_BY_DMA))
1394                         break;
1395
1396                 txq->tx_used_desc = (tx_index + 1) % txq->tx_ring_size;
1397                 txq->tx_desc_count--;
1398
1399                 addr = desc->buf_ptr;
1400                 count = desc->byte_cnt;
1401                 skb = txq->tx_skb[tx_index];
1402                 txq->tx_skb[tx_index] = NULL;
1403
1404                 if (cmd_sts & ERROR_SUMMARY) {
1405                         dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n");
1406                         mp->dev->stats.tx_errors++;
1407                 }
1408
1409                 /*
1410                  * Drop mp->lock while we free the skb.
1411                  */
1412                 spin_unlock_irqrestore(&mp->lock, flags);
1413
1414                 if (cmd_sts & TX_FIRST_DESC)
1415                         dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE);
1416                 else
1417                         dma_unmap_page(NULL, addr, count, DMA_TO_DEVICE);
1418
1419                 if (skb)
1420                         dev_kfree_skb_irq(skb);
1421
1422                 spin_lock_irqsave(&mp->lock, flags);
1423         }
1424         spin_unlock_irqrestore(&mp->lock, flags);
1425 }
1426
1427 static void txq_deinit(struct tx_queue *txq)
1428 {
1429         struct mv643xx_eth_private *mp = txq_to_mp(txq);
1430
1431         txq_disable(txq);
1432         txq_reclaim(txq, 1);
1433
1434         BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
1435
1436         if (txq->tx_desc_area_size <= mp->tx_desc_sram_size)
1437                 iounmap(txq->tx_desc_area);
1438         else
1439                 dma_free_coherent(NULL, txq->tx_desc_area_size,
1440                                   txq->tx_desc_area, txq->tx_desc_dma);
1441
1442         kfree(txq->tx_skb);
1443 }
1444
1445
1446 /* netdev ops and related ***************************************************/
1447 static void update_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
1448 {
1449         u32 pscr_o;
1450         u32 pscr_n;
1451
1452         pscr_o = rdl(mp, PORT_SERIAL_CONTROL(mp->port_num));
1453
1454         /* clear speed, duplex and rx buffer size fields */
1455         pscr_n = pscr_o & ~(SET_MII_SPEED_TO_100   |
1456                             SET_GMII_SPEED_TO_1000 |
1457                             SET_FULL_DUPLEX_MODE   |
1458                             MAX_RX_PACKET_MASK);
1459
1460         if (speed == SPEED_1000) {
1461                 pscr_n |= SET_GMII_SPEED_TO_1000 | MAX_RX_PACKET_9700BYTE;
1462         } else {
1463                 if (speed == SPEED_100)
1464                         pscr_n |= SET_MII_SPEED_TO_100;
1465                 pscr_n |= MAX_RX_PACKET_1522BYTE;
1466         }
1467
1468         if (duplex == DUPLEX_FULL)
1469                 pscr_n |= SET_FULL_DUPLEX_MODE;
1470
1471         if (pscr_n != pscr_o) {
1472                 if ((pscr_o & SERIAL_PORT_ENABLE) == 0)
1473                         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_n);
1474                 else {
1475                         txq_disable(mp->txq);
1476                         pscr_o &= ~SERIAL_PORT_ENABLE;
1477                         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_o);
1478                         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_n);
1479                         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr_n);
1480                         txq_enable(mp->txq);
1481                 }
1482         }
1483 }
1484
1485 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
1486 {
1487         struct net_device *dev = (struct net_device *)dev_id;
1488         struct mv643xx_eth_private *mp = netdev_priv(dev);
1489         u32 int_cause;
1490         u32 int_cause_ext;
1491
1492         int_cause = rdl(mp, INT_CAUSE(mp->port_num)) & (INT_RX | INT_EXT);
1493         if (int_cause == 0)
1494                 return IRQ_NONE;
1495
1496         int_cause_ext = 0;
1497         if (int_cause & INT_EXT) {
1498                 int_cause_ext = rdl(mp, INT_CAUSE_EXT(mp->port_num))
1499                                 & (INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX);
1500                 wrl(mp, INT_CAUSE_EXT(mp->port_num), ~int_cause_ext);
1501         }
1502
1503         if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK)) {
1504                 if (mii_link_ok(&mp->mii)) {
1505                         struct ethtool_cmd cmd;
1506
1507                         mii_ethtool_gset(&mp->mii, &cmd);
1508                         update_pscr(mp, cmd.speed, cmd.duplex);
1509                         txq_enable(mp->txq);
1510                         if (!netif_carrier_ok(dev)) {
1511                                 netif_carrier_on(dev);
1512                                 __txq_maybe_wake(mp->txq);
1513                         }
1514                 } else if (netif_carrier_ok(dev)) {
1515                         netif_stop_queue(dev);
1516                         netif_carrier_off(dev);
1517                 }
1518         }
1519
1520 #ifdef MV643XX_ETH_NAPI
1521         if (int_cause & INT_RX) {
1522                 wrl(mp, INT_MASK(mp->port_num), 0x00000000);
1523                 rdl(mp, INT_MASK(mp->port_num));
1524
1525                 netif_rx_schedule(dev, &mp->napi);
1526         }
1527 #else
1528         if (int_cause & INT_RX)
1529                 rxq_process(mp->rxq, INT_MAX);
1530 #endif
1531
1532         if (int_cause_ext & INT_EXT_TX) {
1533                 txq_reclaim(mp->txq, 0);
1534                 __txq_maybe_wake(mp->txq);
1535         }
1536
1537         return IRQ_HANDLED;
1538 }
1539
1540 static void phy_reset(struct mv643xx_eth_private *mp)
1541 {
1542         unsigned int data;
1543
1544         smi_reg_read(mp, mp->phy_addr, 0, &data);
1545         data |= 0x8000;
1546         smi_reg_write(mp, mp->phy_addr, 0, data);
1547
1548         do {
1549                 udelay(1);
1550                 smi_reg_read(mp, mp->phy_addr, 0, &data);
1551         } while (data & 0x8000);
1552 }
1553
1554 static void port_start(struct mv643xx_eth_private *mp)
1555 {
1556         u32 pscr;
1557         struct ethtool_cmd ethtool_cmd;
1558         int i;
1559
1560         /*
1561          * Configure basic link parameters.
1562          */
1563         pscr = rdl(mp, PORT_SERIAL_CONTROL(mp->port_num));
1564         pscr &= ~(SERIAL_PORT_ENABLE | FORCE_LINK_PASS);
1565         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr);
1566         pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL |
1567                 DISABLE_AUTO_NEG_SPEED_GMII    |
1568                 DISABLE_AUTO_NEG_FOR_DUPLEX    |
1569                 DO_NOT_FORCE_LINK_FAIL         |
1570                 SERIAL_PORT_CONTROL_RESERVED;
1571         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr);
1572         pscr |= SERIAL_PORT_ENABLE;
1573         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), pscr);
1574
1575         wrl(mp, SDMA_CONFIG(mp->port_num), PORT_SDMA_CONFIG_DEFAULT_VALUE);
1576
1577         mv643xx_eth_get_settings(mp->dev, &ethtool_cmd);
1578         phy_reset(mp);
1579         mv643xx_eth_set_settings(mp->dev, &ethtool_cmd);
1580
1581         /*
1582          * Configure TX path and queues.
1583          */
1584         wrl(mp, TX_BW_MTU(mp->port_num), 0);
1585         for (i = 0; i < 1; i++) {
1586                 struct tx_queue *txq = mp->txq;
1587                 int off = TXQ_CURRENT_DESC_PTR(mp->port_num);
1588                 u32 addr;
1589
1590                 addr = (u32)txq->tx_desc_dma;
1591                 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
1592                 wrl(mp, off, addr);
1593         }
1594
1595         /*
1596          * Add configured unicast address to address filter table.
1597          */
1598         uc_addr_set(mp, mp->dev->dev_addr);
1599
1600         /*
1601          * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
1602          * frames to RX queue #0.
1603          */
1604         wrl(mp, PORT_CONFIG(mp->port_num), 0x00000000);
1605
1606         /*
1607          * Treat BPDUs as normal multicasts, and disable partition mode.
1608          */
1609         wrl(mp, PORT_CONFIG_EXT(mp->port_num), 0x00000000);
1610
1611         /*
1612          * Enable the receive queue.
1613          */
1614         for (i = 0; i < 1; i++) {
1615                 struct rx_queue *rxq = mp->rxq;
1616                 int off = RXQ_CURRENT_DESC_PTR(mp->port_num);
1617                 u32 addr;
1618
1619                 addr = (u32)rxq->rx_desc_dma;
1620                 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
1621                 wrl(mp, off, addr);
1622
1623                 rxq_enable(rxq);
1624         }
1625 }
1626
1627 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int delay)
1628 {
1629         unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64;
1630
1631         if (coal > 0x3fff)
1632                 coal = 0x3fff;
1633
1634         wrl(mp, SDMA_CONFIG(mp->port_num),
1635                 ((coal & 0x3fff) << 8) |
1636                 (rdl(mp, SDMA_CONFIG(mp->port_num))
1637                         & 0xffc000ff));
1638 }
1639
1640 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int delay)
1641 {
1642         unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64;
1643
1644         if (coal > 0x3fff)
1645                 coal = 0x3fff;
1646         wrl(mp, TX_FIFO_URGENT_THRESHOLD(mp->port_num), (coal & 0x3fff) << 4);
1647 }
1648
1649 static int mv643xx_eth_open(struct net_device *dev)
1650 {
1651         struct mv643xx_eth_private *mp = netdev_priv(dev);
1652         int err;
1653
1654         wrl(mp, INT_CAUSE(mp->port_num), 0);
1655         wrl(mp, INT_CAUSE_EXT(mp->port_num), 0);
1656         rdl(mp, INT_CAUSE_EXT(mp->port_num));
1657
1658         err = request_irq(dev->irq, mv643xx_eth_irq,
1659                           IRQF_SHARED | IRQF_SAMPLE_RANDOM,
1660                           dev->name, dev);
1661         if (err) {
1662                 dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
1663                 return -EAGAIN;
1664         }
1665
1666         init_mac_tables(mp);
1667
1668         err = rxq_init(mp);
1669         if (err)
1670                 goto out;
1671         rxq_refill(mp->rxq);
1672
1673         err = txq_init(mp);
1674         if (err)
1675                 goto out_free;
1676
1677 #ifdef MV643XX_ETH_NAPI
1678         napi_enable(&mp->napi);
1679 #endif
1680
1681         port_start(mp);
1682
1683         set_rx_coal(mp, 0);
1684         set_tx_coal(mp, 0);
1685
1686         wrl(mp, INT_MASK_EXT(mp->port_num),
1687             INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX);
1688
1689         wrl(mp, INT_MASK(mp->port_num), INT_RX | INT_EXT);
1690
1691         return 0;
1692
1693
1694 out_free:
1695         rxq_deinit(mp->rxq);
1696 out:
1697         free_irq(dev->irq, dev);
1698
1699         return err;
1700 }
1701
1702 static void port_reset(struct mv643xx_eth_private *mp)
1703 {
1704         unsigned int data;
1705
1706         txq_disable(mp->txq);
1707         rxq_disable(mp->rxq);
1708         while (!(rdl(mp, PORT_STATUS(mp->port_num)) & TX_FIFO_EMPTY))
1709                 udelay(10);
1710
1711         /* Reset the Enable bit in the Configuration Register */
1712         data = rdl(mp, PORT_SERIAL_CONTROL(mp->port_num));
1713         data &= ~(SERIAL_PORT_ENABLE            |
1714                   DO_NOT_FORCE_LINK_FAIL        |
1715                   FORCE_LINK_PASS);
1716         wrl(mp, PORT_SERIAL_CONTROL(mp->port_num), data);
1717 }
1718
1719 static int mv643xx_eth_stop(struct net_device *dev)
1720 {
1721         struct mv643xx_eth_private *mp = netdev_priv(dev);
1722
1723         wrl(mp, INT_MASK(mp->port_num), 0x00000000);
1724         rdl(mp, INT_MASK(mp->port_num));
1725
1726 #ifdef MV643XX_ETH_NAPI
1727         napi_disable(&mp->napi);
1728 #endif
1729         netif_carrier_off(dev);
1730         netif_stop_queue(dev);
1731
1732         free_irq(dev->irq, dev);
1733
1734         port_reset(mp);
1735         mib_counters_update(mp);
1736
1737         txq_deinit(mp->txq);
1738         rxq_deinit(mp->rxq);
1739
1740         return 0;
1741 }
1742
1743 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1744 {
1745         struct mv643xx_eth_private *mp = netdev_priv(dev);
1746
1747         return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL);
1748 }
1749
1750 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
1751 {
1752         if (new_mtu < 64 || new_mtu > 9500)
1753                 return -EINVAL;
1754
1755         dev->mtu = new_mtu;
1756         if (!netif_running(dev))
1757                 return 0;
1758
1759         /*
1760          * Stop and then re-open the interface. This will allocate RX
1761          * skbs of the new MTU.
1762          * There is a possible danger that the open will not succeed,
1763          * due to memory being full.
1764          */
1765         mv643xx_eth_stop(dev);
1766         if (mv643xx_eth_open(dev)) {
1767                 dev_printk(KERN_ERR, &dev->dev,
1768                            "fatal error on re-opening device after "
1769                            "MTU change\n");
1770         }
1771
1772         return 0;
1773 }
1774
1775 static void tx_timeout_task(struct work_struct *ugly)
1776 {
1777         struct mv643xx_eth_private *mp;
1778
1779         mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
1780         if (netif_running(mp->dev)) {
1781                 netif_stop_queue(mp->dev);
1782
1783                 port_reset(mp);
1784                 port_start(mp);
1785
1786                 __txq_maybe_wake(mp->txq);
1787         }
1788 }
1789
1790 static void mv643xx_eth_tx_timeout(struct net_device *dev)
1791 {
1792         struct mv643xx_eth_private *mp = netdev_priv(dev);
1793
1794         dev_printk(KERN_INFO, &dev->dev, "tx timeout\n");
1795
1796         schedule_work(&mp->tx_timeout_task);
1797 }
1798
1799 #ifdef CONFIG_NET_POLL_CONTROLLER
1800 static void mv643xx_eth_netpoll(struct net_device *dev)
1801 {
1802         struct mv643xx_eth_private *mp = netdev_priv(dev);
1803
1804         wrl(mp, INT_MASK(mp->port_num), 0x00000000);
1805         rdl(mp, INT_MASK(mp->port_num));
1806
1807         mv643xx_eth_irq(dev->irq, dev);
1808
1809         wrl(mp, INT_MASK(mp->port_num), INT_RX | INT_CAUSE_EXT);
1810 }
1811 #endif
1812
1813 static int mv643xx_eth_mdio_read(struct net_device *dev, int addr, int reg)
1814 {
1815         struct mv643xx_eth_private *mp = netdev_priv(dev);
1816         int val;
1817
1818         smi_reg_read(mp, addr, reg, &val);
1819
1820         return val;
1821 }
1822
1823 static void mv643xx_eth_mdio_write(struct net_device *dev, int addr, int reg, int val)
1824 {
1825         struct mv643xx_eth_private *mp = netdev_priv(dev);
1826         smi_reg_write(mp, addr, reg, val);
1827 }
1828
1829
1830 /* platform glue ************************************************************/
1831 static void
1832 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
1833                               struct mbus_dram_target_info *dram)
1834 {
1835         void __iomem *base = msp->base;
1836         u32 win_enable;
1837         u32 win_protect;
1838         int i;
1839
1840         for (i = 0; i < 6; i++) {
1841                 writel(0, base + WINDOW_BASE(i));
1842                 writel(0, base + WINDOW_SIZE(i));
1843                 if (i < 4)
1844                         writel(0, base + WINDOW_REMAP_HIGH(i));
1845         }
1846
1847         win_enable = 0x3f;
1848         win_protect = 0;
1849
1850         for (i = 0; i < dram->num_cs; i++) {
1851                 struct mbus_dram_window *cs = dram->cs + i;
1852
1853                 writel((cs->base & 0xffff0000) |
1854                         (cs->mbus_attr << 8) |
1855                         dram->mbus_dram_target_id, base + WINDOW_BASE(i));
1856                 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
1857
1858                 win_enable &= ~(1 << i);
1859                 win_protect |= 3 << (2 * i);
1860         }
1861
1862         writel(win_enable, base + WINDOW_BAR_ENABLE);
1863         msp->win_protect = win_protect;
1864 }
1865
1866 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
1867 {
1868         static int mv643xx_eth_version_printed = 0;
1869         struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
1870         struct mv643xx_eth_shared_private *msp;
1871         struct resource *res;
1872         int ret;
1873
1874         if (!mv643xx_eth_version_printed++)
1875                 printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n");
1876
1877         ret = -EINVAL;
1878         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1879         if (res == NULL)
1880                 goto out;
1881
1882         ret = -ENOMEM;
1883         msp = kmalloc(sizeof(*msp), GFP_KERNEL);
1884         if (msp == NULL)
1885                 goto out;
1886         memset(msp, 0, sizeof(*msp));
1887
1888         msp->base = ioremap(res->start, res->end - res->start + 1);
1889         if (msp->base == NULL)
1890                 goto out_free;
1891
1892         spin_lock_init(&msp->phy_lock);
1893
1894         /*
1895          * (Re-)program MBUS remapping windows if we are asked to.
1896          */
1897         if (pd != NULL && pd->dram != NULL)
1898                 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
1899
1900         /*
1901          * Detect hardware parameters.
1902          */
1903         msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
1904
1905         platform_set_drvdata(pdev, msp);
1906
1907         return 0;
1908
1909 out_free:
1910         kfree(msp);
1911 out:
1912         return ret;
1913 }
1914
1915 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
1916 {
1917         struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
1918
1919         iounmap(msp->base);
1920         kfree(msp);
1921
1922         return 0;
1923 }
1924
1925 static struct platform_driver mv643xx_eth_shared_driver = {
1926         .probe          = mv643xx_eth_shared_probe,
1927         .remove         = mv643xx_eth_shared_remove,
1928         .driver = {
1929                 .name   = MV643XX_ETH_SHARED_NAME,
1930                 .owner  = THIS_MODULE,
1931         },
1932 };
1933
1934 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
1935 {
1936         int addr_shift = 5 * mp->port_num;
1937         u32 data;
1938
1939         data = rdl(mp, PHY_ADDR);
1940         data &= ~(0x1f << addr_shift);
1941         data |= (phy_addr & 0x1f) << addr_shift;
1942         wrl(mp, PHY_ADDR, data);
1943 }
1944
1945 static int phy_addr_get(struct mv643xx_eth_private *mp)
1946 {
1947         unsigned int data;
1948
1949         data = rdl(mp, PHY_ADDR);
1950
1951         return (data >> (5 * mp->port_num)) & 0x1f;
1952 }
1953
1954 static void set_params(struct mv643xx_eth_private *mp,
1955                        struct mv643xx_eth_platform_data *pd)
1956 {
1957         struct net_device *dev = mp->dev;
1958
1959         if (is_valid_ether_addr(pd->mac_addr))
1960                 memcpy(dev->dev_addr, pd->mac_addr, 6);
1961         else
1962                 uc_addr_get(mp, dev->dev_addr);
1963
1964         if (pd->phy_addr == -1) {
1965                 mp->shared_smi = NULL;
1966                 mp->phy_addr = -1;
1967         } else {
1968                 mp->shared_smi = mp->shared;
1969                 if (pd->shared_smi != NULL)
1970                         mp->shared_smi = platform_get_drvdata(pd->shared_smi);
1971
1972                 if (pd->force_phy_addr || pd->phy_addr) {
1973                         mp->phy_addr = pd->phy_addr & 0x3f;
1974                         phy_addr_set(mp, mp->phy_addr);
1975                 } else {
1976                         mp->phy_addr = phy_addr_get(mp);
1977                 }
1978         }
1979
1980         mp->default_rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
1981         if (pd->rx_queue_size)
1982                 mp->default_rx_ring_size = pd->rx_queue_size;
1983         mp->rx_desc_sram_addr = pd->rx_sram_addr;
1984         mp->rx_desc_sram_size = pd->rx_sram_size;
1985
1986         mp->default_tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
1987         if (pd->tx_queue_size)
1988                 mp->default_tx_ring_size = pd->tx_queue_size;
1989         mp->tx_desc_sram_addr = pd->tx_sram_addr;
1990         mp->tx_desc_sram_size = pd->tx_sram_size;
1991 }
1992
1993 static int phy_detect(struct mv643xx_eth_private *mp)
1994 {
1995         unsigned int data;
1996         unsigned int data2;
1997
1998         smi_reg_read(mp, mp->phy_addr, 0, &data);
1999         smi_reg_write(mp, mp->phy_addr, 0, data ^ 0x1000);
2000
2001         smi_reg_read(mp, mp->phy_addr, 0, &data2);
2002         if (((data ^ data2) & 0x1000) == 0)
2003                 return -ENODEV;
2004
2005         smi_reg_write(mp, mp->phy_addr, 0, data);
2006
2007         return 0;
2008 }
2009
2010 static int phy_init(struct mv643xx_eth_private *mp,
2011                     struct mv643xx_eth_platform_data *pd)
2012 {
2013         struct ethtool_cmd cmd;
2014         int err;
2015
2016         err = phy_detect(mp);
2017         if (err) {
2018                 dev_printk(KERN_INFO, &mp->dev->dev,
2019                            "no PHY detected at addr %d\n", mp->phy_addr);
2020                 return err;
2021         }
2022         phy_reset(mp);
2023
2024         mp->mii.phy_id = mp->phy_addr;
2025         mp->mii.phy_id_mask = 0x3f;
2026         mp->mii.reg_num_mask = 0x1f;
2027         mp->mii.dev = mp->dev;
2028         mp->mii.mdio_read = mv643xx_eth_mdio_read;
2029         mp->mii.mdio_write = mv643xx_eth_mdio_write;
2030
2031         mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii);
2032
2033         memset(&cmd, 0, sizeof(cmd));
2034
2035         cmd.port = PORT_MII;
2036         cmd.transceiver = XCVR_INTERNAL;
2037         cmd.phy_address = mp->phy_addr;
2038         if (pd->speed == 0) {
2039                 cmd.autoneg = AUTONEG_ENABLE;
2040                 cmd.speed = SPEED_100;
2041                 cmd.advertising = ADVERTISED_10baseT_Half  |
2042                                   ADVERTISED_10baseT_Full  |
2043                                   ADVERTISED_100baseT_Half |
2044                                   ADVERTISED_100baseT_Full;
2045                 if (mp->mii.supports_gmii)
2046                         cmd.advertising |= ADVERTISED_1000baseT_Full;
2047         } else {
2048                 cmd.autoneg = AUTONEG_DISABLE;
2049                 cmd.speed = pd->speed;
2050                 cmd.duplex = pd->duplex;
2051         }
2052
2053         update_pscr(mp, cmd.speed, cmd.duplex);
2054         mv643xx_eth_set_settings(mp->dev, &cmd);
2055
2056         return 0;
2057 }
2058
2059 static int mv643xx_eth_probe(struct platform_device *pdev)
2060 {
2061         struct mv643xx_eth_platform_data *pd;
2062         struct mv643xx_eth_private *mp;
2063         struct net_device *dev;
2064         struct resource *res;
2065         DECLARE_MAC_BUF(mac);
2066         int err;
2067
2068         pd = pdev->dev.platform_data;
2069         if (pd == NULL) {
2070                 dev_printk(KERN_ERR, &pdev->dev,
2071                            "no mv643xx_eth_platform_data\n");
2072                 return -ENODEV;
2073         }
2074
2075         if (pd->shared == NULL) {
2076                 dev_printk(KERN_ERR, &pdev->dev,
2077                            "no mv643xx_eth_platform_data->shared\n");
2078                 return -ENODEV;
2079         }
2080
2081         dev = alloc_etherdev(sizeof(struct mv643xx_eth_private));
2082         if (!dev)
2083                 return -ENOMEM;
2084
2085         mp = netdev_priv(dev);
2086         platform_set_drvdata(pdev, mp);
2087
2088         mp->shared = platform_get_drvdata(pd->shared);
2089         mp->port_num = pd->port_number;
2090
2091         mp->dev = dev;
2092 #ifdef MV643XX_ETH_NAPI
2093         netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 64);
2094 #endif
2095
2096         set_params(mp, pd);
2097
2098         spin_lock_init(&mp->lock);
2099
2100         mib_counters_clear(mp);
2101         INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2102
2103         err = phy_init(mp, pd);
2104         if (err)
2105                 goto out;
2106         SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2107
2108
2109         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2110         BUG_ON(!res);
2111         dev->irq = res->start;
2112
2113         dev->hard_start_xmit = mv643xx_eth_xmit;
2114         dev->open = mv643xx_eth_open;
2115         dev->stop = mv643xx_eth_stop;
2116         dev->set_multicast_list = mv643xx_eth_set_rx_mode;
2117         dev->set_mac_address = mv643xx_eth_set_mac_address;
2118         dev->do_ioctl = mv643xx_eth_ioctl;
2119         dev->change_mtu = mv643xx_eth_change_mtu;
2120         dev->tx_timeout = mv643xx_eth_tx_timeout;
2121 #ifdef CONFIG_NET_POLL_CONTROLLER
2122         dev->poll_controller = mv643xx_eth_netpoll;
2123 #endif
2124         dev->watchdog_timeo = 2 * HZ;
2125         dev->base_addr = 0;
2126
2127 #ifdef MV643XX_ETH_CHECKSUM_OFFLOAD_TX
2128         /*
2129          * Zero copy can only work if we use Discovery II memory. Else, we will
2130          * have to map the buffers to ISA memory which is only 16 MB
2131          */
2132         dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2133 #endif
2134
2135         SET_NETDEV_DEV(dev, &pdev->dev);
2136
2137         if (mp->shared->win_protect)
2138                 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2139
2140         err = register_netdev(dev);
2141         if (err)
2142                 goto out;
2143
2144         dev_printk(KERN_NOTICE, &dev->dev, "port %d with MAC address %s\n",
2145                    mp->port_num, print_mac(mac, dev->dev_addr));
2146
2147         if (dev->features & NETIF_F_SG)
2148                 dev_printk(KERN_NOTICE, &dev->dev, "scatter/gather enabled\n");
2149
2150         if (dev->features & NETIF_F_IP_CSUM)
2151                 dev_printk(KERN_NOTICE, &dev->dev, "tx checksum offload\n");
2152
2153 #ifdef MV643XX_ETH_NAPI
2154         dev_printk(KERN_NOTICE, &dev->dev, "napi enabled\n");
2155 #endif
2156
2157         if (mp->tx_desc_sram_size > 0)
2158                 dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
2159
2160         return 0;
2161
2162 out:
2163         free_netdev(dev);
2164
2165         return err;
2166 }
2167
2168 static int mv643xx_eth_remove(struct platform_device *pdev)
2169 {
2170         struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2171
2172         unregister_netdev(mp->dev);
2173         flush_scheduled_work();
2174         free_netdev(mp->dev);
2175
2176         platform_set_drvdata(pdev, NULL);
2177
2178         return 0;
2179 }
2180
2181 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2182 {
2183         struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2184
2185         /* Mask all interrupts on ethernet port */
2186         wrl(mp, INT_MASK(mp->port_num), 0);
2187         rdl(mp, INT_MASK(mp->port_num));
2188
2189         if (netif_running(mp->dev))
2190                 port_reset(mp);
2191 }
2192
2193 static struct platform_driver mv643xx_eth_driver = {
2194         .probe          = mv643xx_eth_probe,
2195         .remove         = mv643xx_eth_remove,
2196         .shutdown       = mv643xx_eth_shutdown,
2197         .driver = {
2198                 .name   = MV643XX_ETH_NAME,
2199                 .owner  = THIS_MODULE,
2200         },
2201 };
2202
2203 static int __init mv643xx_eth_init_module(void)
2204 {
2205         int rc;
2206
2207         rc = platform_driver_register(&mv643xx_eth_shared_driver);
2208         if (!rc) {
2209                 rc = platform_driver_register(&mv643xx_eth_driver);
2210                 if (rc)
2211                         platform_driver_unregister(&mv643xx_eth_shared_driver);
2212         }
2213
2214         return rc;
2215 }
2216 module_init(mv643xx_eth_init_module);
2217
2218 static void __exit mv643xx_eth_cleanup_module(void)
2219 {
2220         platform_driver_unregister(&mv643xx_eth_driver);
2221         platform_driver_unregister(&mv643xx_eth_shared_driver);
2222 }
2223 module_exit(mv643xx_eth_cleanup_module);
2224
2225 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani "
2226               "and Dale Farnsworth");
2227 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
2228 MODULE_LICENSE("GPL");
2229 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
2230 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);