2 * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports
3 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com>
5 * Based on the 64360 driver from:
6 * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il>
7 * Rabeeh Khoury <rabeeh@marvell.com>
9 * Copyright (C) 2003 PMC-Sierra, Inc.,
10 * written by Manish Lachwani
12 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
14 * Copyright (C) 2004-2006 MontaVista Software, Inc.
15 * Dale Farnsworth <dale@farnsworth.org>
17 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com>
18 * <sjhill@realitydiluted.com>
20 * Copyright (C) 2007-2008 Marvell Semiconductor
21 * Lennert Buytenhek <buytenh@marvell.com>
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.
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.
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.
38 #include <linux/init.h>
39 #include <linux/dma-mapping.h>
42 #include <linux/tcp.h>
43 #include <linux/udp.h>
44 #include <linux/etherdevice.h>
45 #include <linux/delay.h>
46 #include <linux/ethtool.h>
47 #include <linux/platform_device.h>
48 #include <linux/module.h>
49 #include <linux/kernel.h>
50 #include <linux/spinlock.h>
51 #include <linux/workqueue.h>
52 #include <linux/phy.h>
53 #include <linux/mv643xx_eth.h>
55 #include <linux/types.h>
56 #include <linux/inet_lro.h>
57 #include <asm/system.h>
59 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
60 static char mv643xx_eth_driver_version[] = "1.4";
64 * Registers shared between all ports.
66 #define PHY_ADDR 0x0000
67 #define SMI_REG 0x0004
68 #define SMI_BUSY 0x10000000
69 #define SMI_READ_VALID 0x08000000
70 #define SMI_OPCODE_READ 0x04000000
71 #define SMI_OPCODE_WRITE 0x00000000
72 #define ERR_INT_CAUSE 0x0080
73 #define ERR_INT_SMI_DONE 0x00000010
74 #define ERR_INT_MASK 0x0084
75 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
76 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
77 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
78 #define WINDOW_BAR_ENABLE 0x0290
79 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
82 * Main per-port registers. These live at offset 0x0400 for
83 * port #0, 0x0800 for port #1, and 0x0c00 for port #2.
85 #define PORT_CONFIG 0x0000
86 #define UNICAST_PROMISCUOUS_MODE 0x00000001
87 #define PORT_CONFIG_EXT 0x0004
88 #define MAC_ADDR_LOW 0x0014
89 #define MAC_ADDR_HIGH 0x0018
90 #define SDMA_CONFIG 0x001c
91 #define PORT_SERIAL_CONTROL 0x003c
92 #define PORT_STATUS 0x0044
93 #define TX_FIFO_EMPTY 0x00000400
94 #define TX_IN_PROGRESS 0x00000080
95 #define PORT_SPEED_MASK 0x00000030
96 #define PORT_SPEED_1000 0x00000010
97 #define PORT_SPEED_100 0x00000020
98 #define PORT_SPEED_10 0x00000000
99 #define FLOW_CONTROL_ENABLED 0x00000008
100 #define FULL_DUPLEX 0x00000004
101 #define LINK_UP 0x00000002
102 #define TXQ_COMMAND 0x0048
103 #define TXQ_FIX_PRIO_CONF 0x004c
104 #define TX_BW_RATE 0x0050
105 #define TX_BW_MTU 0x0058
106 #define TX_BW_BURST 0x005c
107 #define INT_CAUSE 0x0060
108 #define INT_TX_END 0x07f80000
109 #define INT_RX 0x000003fc
110 #define INT_EXT 0x00000002
111 #define INT_CAUSE_EXT 0x0064
112 #define INT_EXT_LINK_PHY 0x00110000
113 #define INT_EXT_TX 0x000000ff
114 #define INT_MASK 0x0068
115 #define INT_MASK_EXT 0x006c
116 #define TX_FIFO_URGENT_THRESHOLD 0x0074
117 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc
118 #define TX_BW_RATE_MOVED 0x00e0
119 #define TX_BW_MTU_MOVED 0x00e8
120 #define TX_BW_BURST_MOVED 0x00ec
121 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4))
122 #define RXQ_COMMAND 0x0280
123 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2))
124 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4))
125 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4))
126 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4))
129 * Misc per-port registers.
131 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
132 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
133 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
134 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
138 * SDMA configuration register.
140 #define RX_BURST_SIZE_4_64BIT (2 << 1)
141 #define RX_BURST_SIZE_16_64BIT (4 << 1)
142 #define BLM_RX_NO_SWAP (1 << 4)
143 #define BLM_TX_NO_SWAP (1 << 5)
144 #define TX_BURST_SIZE_4_64BIT (2 << 22)
145 #define TX_BURST_SIZE_16_64BIT (4 << 22)
147 #if defined(__BIG_ENDIAN)
148 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
149 (RX_BURST_SIZE_4_64BIT | \
150 TX_BURST_SIZE_4_64BIT)
151 #elif defined(__LITTLE_ENDIAN)
152 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
153 (RX_BURST_SIZE_4_64BIT | \
156 TX_BURST_SIZE_4_64BIT)
158 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
163 * Port serial control register.
165 #define SET_MII_SPEED_TO_100 (1 << 24)
166 #define SET_GMII_SPEED_TO_1000 (1 << 23)
167 #define SET_FULL_DUPLEX_MODE (1 << 21)
168 #define MAX_RX_PACKET_9700BYTE (5 << 17)
169 #define DISABLE_AUTO_NEG_SPEED_GMII (1 << 13)
170 #define DO_NOT_FORCE_LINK_FAIL (1 << 10)
171 #define SERIAL_PORT_CONTROL_RESERVED (1 << 9)
172 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL (1 << 3)
173 #define DISABLE_AUTO_NEG_FOR_DUPLEX (1 << 2)
174 #define FORCE_LINK_PASS (1 << 1)
175 #define SERIAL_PORT_ENABLE (1 << 0)
177 #define DEFAULT_RX_QUEUE_SIZE 128
178 #define DEFAULT_TX_QUEUE_SIZE 256
184 #if defined(__BIG_ENDIAN)
186 u16 byte_cnt; /* Descriptor buffer byte count */
187 u16 buf_size; /* Buffer size */
188 u32 cmd_sts; /* Descriptor command status */
189 u32 next_desc_ptr; /* Next descriptor pointer */
190 u32 buf_ptr; /* Descriptor buffer pointer */
194 u16 byte_cnt; /* buffer byte count */
195 u16 l4i_chk; /* CPU provided TCP checksum */
196 u32 cmd_sts; /* Command/status field */
197 u32 next_desc_ptr; /* Pointer to next descriptor */
198 u32 buf_ptr; /* pointer to buffer for this descriptor*/
200 #elif defined(__LITTLE_ENDIAN)
202 u32 cmd_sts; /* Descriptor command status */
203 u16 buf_size; /* Buffer size */
204 u16 byte_cnt; /* Descriptor buffer byte count */
205 u32 buf_ptr; /* Descriptor buffer pointer */
206 u32 next_desc_ptr; /* Next descriptor pointer */
210 u32 cmd_sts; /* Command/status field */
211 u16 l4i_chk; /* CPU provided TCP checksum */
212 u16 byte_cnt; /* buffer byte count */
213 u32 buf_ptr; /* pointer to buffer for this descriptor*/
214 u32 next_desc_ptr; /* Pointer to next descriptor */
217 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
220 /* RX & TX descriptor command */
221 #define BUFFER_OWNED_BY_DMA 0x80000000
223 /* RX & TX descriptor status */
224 #define ERROR_SUMMARY 0x00000001
226 /* RX descriptor status */
227 #define LAYER_4_CHECKSUM_OK 0x40000000
228 #define RX_ENABLE_INTERRUPT 0x20000000
229 #define RX_FIRST_DESC 0x08000000
230 #define RX_LAST_DESC 0x04000000
231 #define RX_IP_HDR_OK 0x02000000
232 #define RX_PKT_IS_IPV4 0x01000000
233 #define RX_PKT_IS_ETHERNETV2 0x00800000
234 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000
235 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000
236 #define RX_PKT_IS_VLAN_TAGGED 0x00080000
238 /* TX descriptor command */
239 #define TX_ENABLE_INTERRUPT 0x00800000
240 #define GEN_CRC 0x00400000
241 #define TX_FIRST_DESC 0x00200000
242 #define TX_LAST_DESC 0x00100000
243 #define ZERO_PADDING 0x00080000
244 #define GEN_IP_V4_CHECKSUM 0x00040000
245 #define GEN_TCP_UDP_CHECKSUM 0x00020000
246 #define UDP_FRAME 0x00010000
247 #define MAC_HDR_EXTRA_4_BYTES 0x00008000
248 #define MAC_HDR_EXTRA_8_BYTES 0x00000200
250 #define TX_IHL_SHIFT 11
253 /* global *******************************************************************/
254 struct mv643xx_eth_shared_private {
256 * Ethernet controller base address.
261 * Points at the right SMI instance to use.
263 struct mv643xx_eth_shared_private *smi;
266 * Provides access to local SMI interface.
268 struct mii_bus *smi_bus;
271 * If we have access to the error interrupt pin (which is
272 * somewhat misnamed as it not only reflects internal errors
273 * but also reflects SMI completion), use that to wait for
274 * SMI access completion instead of polling the SMI busy bit.
277 wait_queue_head_t smi_busy_wait;
280 * Per-port MBUS window access register value.
285 * Hardware-specific parameters.
288 int extended_rx_coal_limit;
292 #define TX_BW_CONTROL_ABSENT 0
293 #define TX_BW_CONTROL_OLD_LAYOUT 1
294 #define TX_BW_CONTROL_NEW_LAYOUT 2
296 static int mv643xx_eth_open(struct net_device *dev);
297 static int mv643xx_eth_stop(struct net_device *dev);
300 /* per-port *****************************************************************/
301 struct mib_counters {
302 u64 good_octets_received;
303 u32 bad_octets_received;
304 u32 internal_mac_transmit_err;
305 u32 good_frames_received;
306 u32 bad_frames_received;
307 u32 broadcast_frames_received;
308 u32 multicast_frames_received;
309 u32 frames_64_octets;
310 u32 frames_65_to_127_octets;
311 u32 frames_128_to_255_octets;
312 u32 frames_256_to_511_octets;
313 u32 frames_512_to_1023_octets;
314 u32 frames_1024_to_max_octets;
315 u64 good_octets_sent;
316 u32 good_frames_sent;
317 u32 excessive_collision;
318 u32 multicast_frames_sent;
319 u32 broadcast_frames_sent;
320 u32 unrec_mac_control_received;
322 u32 good_fc_received;
324 u32 undersize_received;
325 u32 fragments_received;
326 u32 oversize_received;
328 u32 mac_receive_error;
334 struct lro_counters {
349 struct rx_desc *rx_desc_area;
350 dma_addr_t rx_desc_dma;
351 int rx_desc_area_size;
352 struct sk_buff **rx_skb;
354 struct net_lro_mgr lro_mgr;
355 struct net_lro_desc lro_arr[8];
367 struct tx_desc *tx_desc_area;
368 dma_addr_t tx_desc_dma;
369 int tx_desc_area_size;
371 struct sk_buff_head tx_skb;
373 unsigned long tx_packets;
374 unsigned long tx_bytes;
375 unsigned long tx_dropped;
378 struct mv643xx_eth_private {
379 struct mv643xx_eth_shared_private *shared;
383 struct net_device *dev;
385 struct phy_device *phy;
387 struct timer_list mib_counters_timer;
388 spinlock_t mib_counters_lock;
389 struct mib_counters mib_counters;
391 struct lro_counters lro_counters;
393 struct work_struct tx_timeout_task;
395 struct napi_struct napi;
404 struct sk_buff_head rx_recycle;
410 unsigned long rx_desc_sram_addr;
411 int rx_desc_sram_size;
413 struct timer_list rx_oom;
414 struct rx_queue rxq[8];
420 unsigned long tx_desc_sram_addr;
421 int tx_desc_sram_size;
423 struct tx_queue txq[8];
427 /* port register accessors **************************************************/
428 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
430 return readl(mp->shared->base + offset);
433 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset)
435 return readl(mp->base + offset);
438 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
440 writel(data, mp->shared->base + offset);
443 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data)
445 writel(data, mp->base + offset);
449 /* rxq/txq helper functions *************************************************/
450 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq)
452 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]);
455 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq)
457 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]);
460 static void rxq_enable(struct rx_queue *rxq)
462 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
463 wrlp(mp, RXQ_COMMAND, 1 << rxq->index);
466 static void rxq_disable(struct rx_queue *rxq)
468 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
469 u8 mask = 1 << rxq->index;
471 wrlp(mp, RXQ_COMMAND, mask << 8);
472 while (rdlp(mp, RXQ_COMMAND) & mask)
476 static void txq_reset_hw_ptr(struct tx_queue *txq)
478 struct mv643xx_eth_private *mp = txq_to_mp(txq);
481 addr = (u32)txq->tx_desc_dma;
482 addr += txq->tx_curr_desc * sizeof(struct tx_desc);
483 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr);
486 static void txq_enable(struct tx_queue *txq)
488 struct mv643xx_eth_private *mp = txq_to_mp(txq);
489 wrlp(mp, TXQ_COMMAND, 1 << txq->index);
492 static void txq_disable(struct tx_queue *txq)
494 struct mv643xx_eth_private *mp = txq_to_mp(txq);
495 u8 mask = 1 << txq->index;
497 wrlp(mp, TXQ_COMMAND, mask << 8);
498 while (rdlp(mp, TXQ_COMMAND) & mask)
502 static void txq_maybe_wake(struct tx_queue *txq)
504 struct mv643xx_eth_private *mp = txq_to_mp(txq);
505 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
507 if (netif_tx_queue_stopped(nq)) {
508 __netif_tx_lock(nq, smp_processor_id());
509 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1)
510 netif_tx_wake_queue(nq);
511 __netif_tx_unlock(nq);
516 /* rx napi ******************************************************************/
518 mv643xx_get_skb_header(struct sk_buff *skb, void **iphdr, void **tcph,
519 u64 *hdr_flags, void *priv)
521 unsigned long cmd_sts = (unsigned long)priv;
524 * Make sure that this packet is Ethernet II, is not VLAN
525 * tagged, is IPv4, has a valid IP header, and is TCP.
527 if ((cmd_sts & (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
528 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_MASK |
529 RX_PKT_IS_VLAN_TAGGED)) !=
530 (RX_IP_HDR_OK | RX_PKT_IS_IPV4 |
531 RX_PKT_IS_ETHERNETV2 | RX_PKT_LAYER4_TYPE_TCP_IPV4))
534 skb_reset_network_header(skb);
535 skb_set_transport_header(skb, ip_hdrlen(skb));
536 *iphdr = ip_hdr(skb);
537 *tcph = tcp_hdr(skb);
538 *hdr_flags = LRO_IPV4 | LRO_TCP;
543 static int rxq_process(struct rx_queue *rxq, int budget)
545 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
546 struct net_device_stats *stats = &mp->dev->stats;
547 int lro_flush_needed;
550 lro_flush_needed = 0;
552 while (rx < budget && rxq->rx_desc_count) {
553 struct rx_desc *rx_desc;
554 unsigned int cmd_sts;
558 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc];
560 cmd_sts = rx_desc->cmd_sts;
561 if (cmd_sts & BUFFER_OWNED_BY_DMA)
565 skb = rxq->rx_skb[rxq->rx_curr_desc];
566 rxq->rx_skb[rxq->rx_curr_desc] = NULL;
569 if (rxq->rx_curr_desc == rxq->rx_ring_size)
570 rxq->rx_curr_desc = 0;
572 dma_unmap_single(NULL, rx_desc->buf_ptr,
573 rx_desc->buf_size, DMA_FROM_DEVICE);
574 rxq->rx_desc_count--;
577 mp->work_rx_refill |= 1 << rxq->index;
579 byte_cnt = rx_desc->byte_cnt;
584 * Note that the descriptor byte count includes 2 dummy
585 * bytes automatically inserted by the hardware at the
586 * start of the packet (which we don't count), and a 4
587 * byte CRC at the end of the packet (which we do count).
590 stats->rx_bytes += byte_cnt - 2;
593 * In case we received a packet without first / last bits
594 * on, or the error summary bit is set, the packet needs
597 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY))
598 != (RX_FIRST_DESC | RX_LAST_DESC))
602 * The -4 is for the CRC in the trailer of the
605 skb_put(skb, byte_cnt - 2 - 4);
607 if (cmd_sts & LAYER_4_CHECKSUM_OK)
608 skb->ip_summed = CHECKSUM_UNNECESSARY;
609 skb->protocol = eth_type_trans(skb, mp->dev);
611 if (skb->dev->features & NETIF_F_LRO &&
612 skb->ip_summed == CHECKSUM_UNNECESSARY) {
613 lro_receive_skb(&rxq->lro_mgr, skb, (void *)cmd_sts);
614 lro_flush_needed = 1;
616 netif_receive_skb(skb);
623 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
624 (RX_FIRST_DESC | RX_LAST_DESC)) {
626 dev_printk(KERN_ERR, &mp->dev->dev,
627 "received packet spanning "
628 "multiple descriptors\n");
631 if (cmd_sts & ERROR_SUMMARY)
637 if (lro_flush_needed)
638 lro_flush_all(&rxq->lro_mgr);
641 mp->work_rx &= ~(1 << rxq->index);
646 static int rxq_refill(struct rx_queue *rxq, int budget)
648 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
652 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) {
656 struct rx_desc *rx_desc;
658 skb = __skb_dequeue(&mp->rx_recycle);
660 skb = dev_alloc_skb(mp->skb_size +
661 dma_get_cache_alignment() - 1);
668 unaligned = (u32)skb->data & (dma_get_cache_alignment() - 1);
670 skb_reserve(skb, dma_get_cache_alignment() - unaligned);
673 rxq->rx_desc_count++;
675 rx = rxq->rx_used_desc++;
676 if (rxq->rx_used_desc == rxq->rx_ring_size)
677 rxq->rx_used_desc = 0;
679 rx_desc = rxq->rx_desc_area + rx;
681 rx_desc->buf_ptr = dma_map_single(NULL, skb->data,
682 mp->skb_size, DMA_FROM_DEVICE);
683 rx_desc->buf_size = mp->skb_size;
684 rxq->rx_skb[rx] = skb;
686 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
690 * The hardware automatically prepends 2 bytes of
691 * dummy data to each received packet, so that the
692 * IP header ends up 16-byte aligned.
697 if (refilled < budget)
698 mp->work_rx_refill &= ~(1 << rxq->index);
705 /* tx ***********************************************************************/
706 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
710 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
711 skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
712 if (fragp->size <= 8 && fragp->page_offset & 7)
719 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
721 int nr_frags = skb_shinfo(skb)->nr_frags;
724 for (frag = 0; frag < nr_frags; frag++) {
725 skb_frag_t *this_frag;
727 struct tx_desc *desc;
729 this_frag = &skb_shinfo(skb)->frags[frag];
730 tx_index = txq->tx_curr_desc++;
731 if (txq->tx_curr_desc == txq->tx_ring_size)
732 txq->tx_curr_desc = 0;
733 desc = &txq->tx_desc_area[tx_index];
736 * The last fragment will generate an interrupt
737 * which will free the skb on TX completion.
739 if (frag == nr_frags - 1) {
740 desc->cmd_sts = BUFFER_OWNED_BY_DMA |
741 ZERO_PADDING | TX_LAST_DESC |
744 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
748 desc->byte_cnt = this_frag->size;
749 desc->buf_ptr = dma_map_page(NULL, this_frag->page,
750 this_frag->page_offset,
756 static inline __be16 sum16_as_be(__sum16 sum)
758 return (__force __be16)sum;
761 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
763 struct mv643xx_eth_private *mp = txq_to_mp(txq);
764 int nr_frags = skb_shinfo(skb)->nr_frags;
766 struct tx_desc *desc;
771 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
774 if (skb->ip_summed == CHECKSUM_PARTIAL) {
777 BUG_ON(skb->protocol != htons(ETH_P_IP) &&
778 skb->protocol != htons(ETH_P_8021Q));
780 tag_bytes = (void *)ip_hdr(skb) - (void *)skb->data - ETH_HLEN;
781 if (unlikely(tag_bytes & ~12)) {
782 if (skb_checksum_help(skb) == 0)
789 cmd_sts |= MAC_HDR_EXTRA_4_BYTES;
791 cmd_sts |= MAC_HDR_EXTRA_8_BYTES;
793 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
795 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
797 switch (ip_hdr(skb)->protocol) {
799 cmd_sts |= UDP_FRAME;
800 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
803 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
810 /* Errata BTS #50, IHL must be 5 if no HW checksum */
811 cmd_sts |= 5 << TX_IHL_SHIFT;
814 tx_index = txq->tx_curr_desc++;
815 if (txq->tx_curr_desc == txq->tx_ring_size)
816 txq->tx_curr_desc = 0;
817 desc = &txq->tx_desc_area[tx_index];
820 txq_submit_frag_skb(txq, skb);
821 length = skb_headlen(skb);
823 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
827 desc->l4i_chk = l4i_chk;
828 desc->byte_cnt = length;
829 desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE);
831 __skb_queue_tail(&txq->tx_skb, skb);
833 /* ensure all other descriptors are written before first cmd_sts */
835 desc->cmd_sts = cmd_sts;
837 /* clear TX_END status */
838 mp->work_tx_end &= ~(1 << txq->index);
840 /* ensure all descriptors are written before poking hardware */
844 txq->tx_desc_count += nr_frags + 1;
849 static int mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
851 struct mv643xx_eth_private *mp = netdev_priv(dev);
853 struct tx_queue *txq;
854 struct netdev_queue *nq;
856 queue = skb_get_queue_mapping(skb);
857 txq = mp->txq + queue;
858 nq = netdev_get_tx_queue(dev, queue);
860 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
862 dev_printk(KERN_DEBUG, &dev->dev,
863 "failed to linearize skb with tiny "
864 "unaligned fragment\n");
865 return NETDEV_TX_BUSY;
868 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
870 dev_printk(KERN_ERR, &dev->dev, "tx queue full?!\n");
875 if (!txq_submit_skb(txq, skb)) {
878 txq->tx_bytes += skb->len;
880 dev->trans_start = jiffies;
882 entries_left = txq->tx_ring_size - txq->tx_desc_count;
883 if (entries_left < MAX_SKB_FRAGS + 1)
884 netif_tx_stop_queue(nq);
891 /* tx napi ******************************************************************/
892 static void txq_kick(struct tx_queue *txq)
894 struct mv643xx_eth_private *mp = txq_to_mp(txq);
895 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
899 __netif_tx_lock(nq, smp_processor_id());
901 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index))
904 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index));
905 expected_ptr = (u32)txq->tx_desc_dma +
906 txq->tx_curr_desc * sizeof(struct tx_desc);
908 if (hw_desc_ptr != expected_ptr)
912 __netif_tx_unlock(nq);
914 mp->work_tx_end &= ~(1 << txq->index);
917 static int txq_reclaim(struct tx_queue *txq, int budget, int force)
919 struct mv643xx_eth_private *mp = txq_to_mp(txq);
920 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index);
923 __netif_tx_lock(nq, smp_processor_id());
926 while (reclaimed < budget && txq->tx_desc_count > 0) {
928 struct tx_desc *desc;
932 tx_index = txq->tx_used_desc;
933 desc = &txq->tx_desc_area[tx_index];
934 cmd_sts = desc->cmd_sts;
936 if (cmd_sts & BUFFER_OWNED_BY_DMA) {
939 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA;
942 txq->tx_used_desc = tx_index + 1;
943 if (txq->tx_used_desc == txq->tx_ring_size)
944 txq->tx_used_desc = 0;
947 txq->tx_desc_count--;
950 if (cmd_sts & TX_LAST_DESC)
951 skb = __skb_dequeue(&txq->tx_skb);
953 if (cmd_sts & ERROR_SUMMARY) {
954 dev_printk(KERN_INFO, &mp->dev->dev, "tx error\n");
955 mp->dev->stats.tx_errors++;
958 if (cmd_sts & TX_FIRST_DESC) {
959 dma_unmap_single(NULL, desc->buf_ptr,
960 desc->byte_cnt, DMA_TO_DEVICE);
962 dma_unmap_page(NULL, desc->buf_ptr,
963 desc->byte_cnt, DMA_TO_DEVICE);
967 if (skb_queue_len(&mp->rx_recycle) <
969 skb_recycle_check(skb, mp->skb_size +
970 dma_get_cache_alignment() - 1))
971 __skb_queue_head(&mp->rx_recycle, skb);
977 __netif_tx_unlock(nq);
979 if (reclaimed < budget)
980 mp->work_tx &= ~(1 << txq->index);
986 /* tx rate control **********************************************************/
988 * Set total maximum TX rate (shared by all TX queues for this port)
989 * to 'rate' bits per second, with a maximum burst of 'burst' bytes.
991 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst)
997 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
998 if (token_rate > 1023)
1001 mtu = (mp->dev->mtu + 255) >> 8;
1005 bucket_size = (burst + 255) >> 8;
1006 if (bucket_size > 65535)
1007 bucket_size = 65535;
1009 switch (mp->shared->tx_bw_control) {
1010 case TX_BW_CONTROL_OLD_LAYOUT:
1011 wrlp(mp, TX_BW_RATE, token_rate);
1012 wrlp(mp, TX_BW_MTU, mtu);
1013 wrlp(mp, TX_BW_BURST, bucket_size);
1015 case TX_BW_CONTROL_NEW_LAYOUT:
1016 wrlp(mp, TX_BW_RATE_MOVED, token_rate);
1017 wrlp(mp, TX_BW_MTU_MOVED, mtu);
1018 wrlp(mp, TX_BW_BURST_MOVED, bucket_size);
1023 static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
1025 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1029 token_rate = ((rate / 1000) * 64) / (mp->shared->t_clk / 1000);
1030 if (token_rate > 1023)
1033 bucket_size = (burst + 255) >> 8;
1034 if (bucket_size > 65535)
1035 bucket_size = 65535;
1037 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14);
1038 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate);
1041 static void txq_set_fixed_prio_mode(struct tx_queue *txq)
1043 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1048 * Turn on fixed priority mode.
1051 switch (mp->shared->tx_bw_control) {
1052 case TX_BW_CONTROL_OLD_LAYOUT:
1053 off = TXQ_FIX_PRIO_CONF;
1055 case TX_BW_CONTROL_NEW_LAYOUT:
1056 off = TXQ_FIX_PRIO_CONF_MOVED;
1061 val = rdlp(mp, off);
1062 val |= 1 << txq->index;
1067 static void txq_set_wrr(struct tx_queue *txq, int weight)
1069 struct mv643xx_eth_private *mp = txq_to_mp(txq);
1074 * Turn off fixed priority mode.
1077 switch (mp->shared->tx_bw_control) {
1078 case TX_BW_CONTROL_OLD_LAYOUT:
1079 off = TXQ_FIX_PRIO_CONF;
1081 case TX_BW_CONTROL_NEW_LAYOUT:
1082 off = TXQ_FIX_PRIO_CONF_MOVED;
1087 val = rdlp(mp, off);
1088 val &= ~(1 << txq->index);
1092 * Configure WRR weight for this queue.
1095 val = rdlp(mp, off);
1096 val = (val & ~0xff) | (weight & 0xff);
1097 wrlp(mp, TXQ_BW_WRR_CONF(txq->index), val);
1102 /* mii management interface *************************************************/
1103 static irqreturn_t mv643xx_eth_err_irq(int irq, void *dev_id)
1105 struct mv643xx_eth_shared_private *msp = dev_id;
1107 if (readl(msp->base + ERR_INT_CAUSE) & ERR_INT_SMI_DONE) {
1108 writel(~ERR_INT_SMI_DONE, msp->base + ERR_INT_CAUSE);
1109 wake_up(&msp->smi_busy_wait);
1116 static int smi_is_done(struct mv643xx_eth_shared_private *msp)
1118 return !(readl(msp->base + SMI_REG) & SMI_BUSY);
1121 static int smi_wait_ready(struct mv643xx_eth_shared_private *msp)
1123 if (msp->err_interrupt == NO_IRQ) {
1126 for (i = 0; !smi_is_done(msp); i++) {
1135 if (!smi_is_done(msp)) {
1136 wait_event_timeout(msp->smi_busy_wait, smi_is_done(msp),
1137 msecs_to_jiffies(100));
1138 if (!smi_is_done(msp))
1145 static int smi_bus_read(struct mii_bus *bus, int addr, int reg)
1147 struct mv643xx_eth_shared_private *msp = bus->priv;
1148 void __iomem *smi_reg = msp->base + SMI_REG;
1151 if (smi_wait_ready(msp)) {
1152 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1156 writel(SMI_OPCODE_READ | (reg << 21) | (addr << 16), smi_reg);
1158 if (smi_wait_ready(msp)) {
1159 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1163 ret = readl(smi_reg);
1164 if (!(ret & SMI_READ_VALID)) {
1165 printk(KERN_WARNING "mv643xx_eth: SMI bus read not valid\n");
1169 return ret & 0xffff;
1172 static int smi_bus_write(struct mii_bus *bus, int addr, int reg, u16 val)
1174 struct mv643xx_eth_shared_private *msp = bus->priv;
1175 void __iomem *smi_reg = msp->base + SMI_REG;
1177 if (smi_wait_ready(msp)) {
1178 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1182 writel(SMI_OPCODE_WRITE | (reg << 21) |
1183 (addr << 16) | (val & 0xffff), smi_reg);
1185 if (smi_wait_ready(msp)) {
1186 printk(KERN_WARNING "mv643xx_eth: SMI bus busy timeout\n");
1194 /* statistics ***************************************************************/
1195 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1197 struct mv643xx_eth_private *mp = netdev_priv(dev);
1198 struct net_device_stats *stats = &dev->stats;
1199 unsigned long tx_packets = 0;
1200 unsigned long tx_bytes = 0;
1201 unsigned long tx_dropped = 0;
1204 for (i = 0; i < mp->txq_count; i++) {
1205 struct tx_queue *txq = mp->txq + i;
1207 tx_packets += txq->tx_packets;
1208 tx_bytes += txq->tx_bytes;
1209 tx_dropped += txq->tx_dropped;
1212 stats->tx_packets = tx_packets;
1213 stats->tx_bytes = tx_bytes;
1214 stats->tx_dropped = tx_dropped;
1219 static void mv643xx_eth_grab_lro_stats(struct mv643xx_eth_private *mp)
1221 u32 lro_aggregated = 0;
1222 u32 lro_flushed = 0;
1223 u32 lro_no_desc = 0;
1226 for (i = 0; i < mp->rxq_count; i++) {
1227 struct rx_queue *rxq = mp->rxq + i;
1229 lro_aggregated += rxq->lro_mgr.stats.aggregated;
1230 lro_flushed += rxq->lro_mgr.stats.flushed;
1231 lro_no_desc += rxq->lro_mgr.stats.no_desc;
1234 mp->lro_counters.lro_aggregated = lro_aggregated;
1235 mp->lro_counters.lro_flushed = lro_flushed;
1236 mp->lro_counters.lro_no_desc = lro_no_desc;
1239 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset)
1241 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
1244 static void mib_counters_clear(struct mv643xx_eth_private *mp)
1248 for (i = 0; i < 0x80; i += 4)
1252 static void mib_counters_update(struct mv643xx_eth_private *mp)
1254 struct mib_counters *p = &mp->mib_counters;
1256 spin_lock_bh(&mp->mib_counters_lock);
1257 p->good_octets_received += mib_read(mp, 0x00);
1258 p->bad_octets_received += mib_read(mp, 0x08);
1259 p->internal_mac_transmit_err += mib_read(mp, 0x0c);
1260 p->good_frames_received += mib_read(mp, 0x10);
1261 p->bad_frames_received += mib_read(mp, 0x14);
1262 p->broadcast_frames_received += mib_read(mp, 0x18);
1263 p->multicast_frames_received += mib_read(mp, 0x1c);
1264 p->frames_64_octets += mib_read(mp, 0x20);
1265 p->frames_65_to_127_octets += mib_read(mp, 0x24);
1266 p->frames_128_to_255_octets += mib_read(mp, 0x28);
1267 p->frames_256_to_511_octets += mib_read(mp, 0x2c);
1268 p->frames_512_to_1023_octets += mib_read(mp, 0x30);
1269 p->frames_1024_to_max_octets += mib_read(mp, 0x34);
1270 p->good_octets_sent += mib_read(mp, 0x38);
1271 p->good_frames_sent += mib_read(mp, 0x40);
1272 p->excessive_collision += mib_read(mp, 0x44);
1273 p->multicast_frames_sent += mib_read(mp, 0x48);
1274 p->broadcast_frames_sent += mib_read(mp, 0x4c);
1275 p->unrec_mac_control_received += mib_read(mp, 0x50);
1276 p->fc_sent += mib_read(mp, 0x54);
1277 p->good_fc_received += mib_read(mp, 0x58);
1278 p->bad_fc_received += mib_read(mp, 0x5c);
1279 p->undersize_received += mib_read(mp, 0x60);
1280 p->fragments_received += mib_read(mp, 0x64);
1281 p->oversize_received += mib_read(mp, 0x68);
1282 p->jabber_received += mib_read(mp, 0x6c);
1283 p->mac_receive_error += mib_read(mp, 0x70);
1284 p->bad_crc_event += mib_read(mp, 0x74);
1285 p->collision += mib_read(mp, 0x78);
1286 p->late_collision += mib_read(mp, 0x7c);
1287 spin_unlock_bh(&mp->mib_counters_lock);
1289 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ);
1292 static void mib_counters_timer_wrapper(unsigned long _mp)
1294 struct mv643xx_eth_private *mp = (void *)_mp;
1296 mib_counters_update(mp);
1300 /* interrupt coalescing *****************************************************/
1302 * Hardware coalescing parameters are set in units of 64 t_clk
1305 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate
1307 * register_value = coal_delay_in_usec * t_clk_rate / 64000000
1309 * In the ->set*() methods, we round the computed register value
1310 * to the nearest integer.
1312 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp)
1314 u32 val = rdlp(mp, SDMA_CONFIG);
1317 if (mp->shared->extended_rx_coal_limit)
1318 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7);
1320 temp = (val & 0x003fff00) >> 8;
1323 do_div(temp, mp->shared->t_clk);
1325 return (unsigned int)temp;
1328 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1333 temp = (u64)usec * mp->shared->t_clk;
1335 do_div(temp, 64000000);
1337 val = rdlp(mp, SDMA_CONFIG);
1338 if (mp->shared->extended_rx_coal_limit) {
1342 val |= (temp & 0x8000) << 10;
1343 val |= (temp & 0x7fff) << 7;
1348 val |= (temp & 0x3fff) << 8;
1350 wrlp(mp, SDMA_CONFIG, val);
1353 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp)
1357 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4;
1359 do_div(temp, mp->shared->t_clk);
1361 return (unsigned int)temp;
1364 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec)
1368 temp = (u64)usec * mp->shared->t_clk;
1370 do_div(temp, 64000000);
1375 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4);
1379 /* ethtool ******************************************************************/
1380 struct mv643xx_eth_stats {
1381 char stat_string[ETH_GSTRING_LEN];
1388 { #m, FIELD_SIZEOF(struct net_device_stats, m), \
1389 offsetof(struct net_device, stats.m), -1 }
1391 #define MIBSTAT(m) \
1392 { #m, FIELD_SIZEOF(struct mib_counters, m), \
1393 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) }
1395 #define LROSTAT(m) \
1396 { #m, FIELD_SIZEOF(struct lro_counters, m), \
1397 -1, offsetof(struct mv643xx_eth_private, lro_counters.m) }
1399 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = {
1408 MIBSTAT(good_octets_received),
1409 MIBSTAT(bad_octets_received),
1410 MIBSTAT(internal_mac_transmit_err),
1411 MIBSTAT(good_frames_received),
1412 MIBSTAT(bad_frames_received),
1413 MIBSTAT(broadcast_frames_received),
1414 MIBSTAT(multicast_frames_received),
1415 MIBSTAT(frames_64_octets),
1416 MIBSTAT(frames_65_to_127_octets),
1417 MIBSTAT(frames_128_to_255_octets),
1418 MIBSTAT(frames_256_to_511_octets),
1419 MIBSTAT(frames_512_to_1023_octets),
1420 MIBSTAT(frames_1024_to_max_octets),
1421 MIBSTAT(good_octets_sent),
1422 MIBSTAT(good_frames_sent),
1423 MIBSTAT(excessive_collision),
1424 MIBSTAT(multicast_frames_sent),
1425 MIBSTAT(broadcast_frames_sent),
1426 MIBSTAT(unrec_mac_control_received),
1428 MIBSTAT(good_fc_received),
1429 MIBSTAT(bad_fc_received),
1430 MIBSTAT(undersize_received),
1431 MIBSTAT(fragments_received),
1432 MIBSTAT(oversize_received),
1433 MIBSTAT(jabber_received),
1434 MIBSTAT(mac_receive_error),
1435 MIBSTAT(bad_crc_event),
1437 MIBSTAT(late_collision),
1438 LROSTAT(lro_aggregated),
1439 LROSTAT(lro_flushed),
1440 LROSTAT(lro_no_desc),
1444 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp,
1445 struct ethtool_cmd *cmd)
1449 err = phy_read_status(mp->phy);
1451 err = phy_ethtool_gset(mp->phy, cmd);
1454 * The MAC does not support 1000baseT_Half.
1456 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1457 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1463 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp,
1464 struct ethtool_cmd *cmd)
1468 port_status = rdlp(mp, PORT_STATUS);
1470 cmd->supported = SUPPORTED_MII;
1471 cmd->advertising = ADVERTISED_MII;
1472 switch (port_status & PORT_SPEED_MASK) {
1474 cmd->speed = SPEED_10;
1476 case PORT_SPEED_100:
1477 cmd->speed = SPEED_100;
1479 case PORT_SPEED_1000:
1480 cmd->speed = SPEED_1000;
1486 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
1487 cmd->port = PORT_MII;
1488 cmd->phy_address = 0;
1489 cmd->transceiver = XCVR_INTERNAL;
1490 cmd->autoneg = AUTONEG_DISABLE;
1498 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1500 struct mv643xx_eth_private *mp = netdev_priv(dev);
1502 if (mp->phy != NULL)
1503 return mv643xx_eth_get_settings_phy(mp, cmd);
1505 return mv643xx_eth_get_settings_phyless(mp, cmd);
1509 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1511 struct mv643xx_eth_private *mp = netdev_priv(dev);
1513 if (mp->phy == NULL)
1517 * The MAC does not support 1000baseT_Half.
1519 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1521 return phy_ethtool_sset(mp->phy, cmd);
1524 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
1525 struct ethtool_drvinfo *drvinfo)
1527 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1528 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1529 strncpy(drvinfo->fw_version, "N/A", 32);
1530 strncpy(drvinfo->bus_info, "platform", 32);
1531 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats);
1534 static int mv643xx_eth_nway_reset(struct net_device *dev)
1536 struct mv643xx_eth_private *mp = netdev_priv(dev);
1538 if (mp->phy == NULL)
1541 return genphy_restart_aneg(mp->phy);
1544 static u32 mv643xx_eth_get_link(struct net_device *dev)
1546 return !!netif_carrier_ok(dev);
1550 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1552 struct mv643xx_eth_private *mp = netdev_priv(dev);
1554 ec->rx_coalesce_usecs = get_rx_coal(mp);
1555 ec->tx_coalesce_usecs = get_tx_coal(mp);
1561 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
1563 struct mv643xx_eth_private *mp = netdev_priv(dev);
1565 set_rx_coal(mp, ec->rx_coalesce_usecs);
1566 set_tx_coal(mp, ec->tx_coalesce_usecs);
1572 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1574 struct mv643xx_eth_private *mp = netdev_priv(dev);
1576 er->rx_max_pending = 4096;
1577 er->tx_max_pending = 4096;
1578 er->rx_mini_max_pending = 0;
1579 er->rx_jumbo_max_pending = 0;
1581 er->rx_pending = mp->rx_ring_size;
1582 er->tx_pending = mp->tx_ring_size;
1583 er->rx_mini_pending = 0;
1584 er->rx_jumbo_pending = 0;
1588 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er)
1590 struct mv643xx_eth_private *mp = netdev_priv(dev);
1592 if (er->rx_mini_pending || er->rx_jumbo_pending)
1595 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096;
1596 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096;
1598 if (netif_running(dev)) {
1599 mv643xx_eth_stop(dev);
1600 if (mv643xx_eth_open(dev)) {
1601 dev_printk(KERN_ERR, &dev->dev,
1602 "fatal error on re-opening device after "
1603 "ring param change\n");
1612 mv643xx_eth_get_rx_csum(struct net_device *dev)
1614 struct mv643xx_eth_private *mp = netdev_priv(dev);
1616 return !!(rdlp(mp, PORT_CONFIG) & 0x02000000);
1620 mv643xx_eth_set_rx_csum(struct net_device *dev, u32 rx_csum)
1622 struct mv643xx_eth_private *mp = netdev_priv(dev);
1624 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000);
1629 static void mv643xx_eth_get_strings(struct net_device *dev,
1630 uint32_t stringset, uint8_t *data)
1634 if (stringset == ETH_SS_STATS) {
1635 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1636 memcpy(data + i * ETH_GSTRING_LEN,
1637 mv643xx_eth_stats[i].stat_string,
1643 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev,
1644 struct ethtool_stats *stats,
1647 struct mv643xx_eth_private *mp = netdev_priv(dev);
1650 mv643xx_eth_get_stats(dev);
1651 mib_counters_update(mp);
1652 mv643xx_eth_grab_lro_stats(mp);
1654 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) {
1655 const struct mv643xx_eth_stats *stat;
1658 stat = mv643xx_eth_stats + i;
1660 if (stat->netdev_off >= 0)
1661 p = ((void *)mp->dev) + stat->netdev_off;
1663 p = ((void *)mp) + stat->mp_off;
1665 data[i] = (stat->sizeof_stat == 8) ?
1666 *(uint64_t *)p : *(uint32_t *)p;
1670 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset)
1672 if (sset == ETH_SS_STATS)
1673 return ARRAY_SIZE(mv643xx_eth_stats);
1678 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1679 .get_settings = mv643xx_eth_get_settings,
1680 .set_settings = mv643xx_eth_set_settings,
1681 .get_drvinfo = mv643xx_eth_get_drvinfo,
1682 .nway_reset = mv643xx_eth_nway_reset,
1683 .get_link = mv643xx_eth_get_link,
1684 .get_coalesce = mv643xx_eth_get_coalesce,
1685 .set_coalesce = mv643xx_eth_set_coalesce,
1686 .get_ringparam = mv643xx_eth_get_ringparam,
1687 .set_ringparam = mv643xx_eth_set_ringparam,
1688 .get_rx_csum = mv643xx_eth_get_rx_csum,
1689 .set_rx_csum = mv643xx_eth_set_rx_csum,
1690 .set_tx_csum = ethtool_op_set_tx_csum,
1691 .set_sg = ethtool_op_set_sg,
1692 .get_strings = mv643xx_eth_get_strings,
1693 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1694 .get_flags = ethtool_op_get_flags,
1695 .set_flags = ethtool_op_set_flags,
1696 .get_sset_count = mv643xx_eth_get_sset_count,
1700 /* address handling *********************************************************/
1701 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
1703 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH);
1704 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW);
1706 addr[0] = (mac_h >> 24) & 0xff;
1707 addr[1] = (mac_h >> 16) & 0xff;
1708 addr[2] = (mac_h >> 8) & 0xff;
1709 addr[3] = mac_h & 0xff;
1710 addr[4] = (mac_l >> 8) & 0xff;
1711 addr[5] = mac_l & 0xff;
1714 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
1716 wrlp(mp, MAC_ADDR_HIGH,
1717 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]);
1718 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]);
1721 static u32 uc_addr_filter_mask(struct net_device *dev)
1723 struct dev_addr_list *uc_ptr;
1726 if (dev->flags & IFF_PROMISC)
1729 nibbles = 1 << (dev->dev_addr[5] & 0x0f);
1730 for (uc_ptr = dev->uc_list; uc_ptr != NULL; uc_ptr = uc_ptr->next) {
1731 if (memcmp(dev->dev_addr, uc_ptr->da_addr, 5))
1733 if ((dev->dev_addr[5] ^ uc_ptr->da_addr[5]) & 0xf0)
1736 nibbles |= 1 << (uc_ptr->da_addr[5] & 0x0f);
1742 static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
1744 struct mv643xx_eth_private *mp = netdev_priv(dev);
1749 uc_addr_set(mp, dev->dev_addr);
1751 port_config = rdlp(mp, PORT_CONFIG);
1752 nibbles = uc_addr_filter_mask(dev);
1754 port_config |= UNICAST_PROMISCUOUS_MODE;
1755 wrlp(mp, PORT_CONFIG, port_config);
1759 for (i = 0; i < 16; i += 4) {
1760 int off = UNICAST_TABLE(mp->port_num) + i;
1777 port_config &= ~UNICAST_PROMISCUOUS_MODE;
1778 wrlp(mp, PORT_CONFIG, port_config);
1781 static int addr_crc(unsigned char *addr)
1786 for (i = 0; i < 6; i++) {
1789 crc = (crc ^ addr[i]) << 8;
1790 for (j = 7; j >= 0; j--) {
1791 if (crc & (0x100 << j))
1799 static void mv643xx_eth_program_multicast_filter(struct net_device *dev)
1801 struct mv643xx_eth_private *mp = netdev_priv(dev);
1804 struct dev_addr_list *addr;
1807 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
1813 port_num = mp->port_num;
1814 accept = 0x01010101;
1815 for (i = 0; i < 0x100; i += 4) {
1816 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept);
1817 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept);
1822 mc_spec = kmalloc(0x200, GFP_ATOMIC);
1823 if (mc_spec == NULL)
1825 mc_other = mc_spec + (0x100 >> 2);
1827 memset(mc_spec, 0, 0x100);
1828 memset(mc_other, 0, 0x100);
1830 for (addr = dev->mc_list; addr != NULL; addr = addr->next) {
1831 u8 *a = addr->da_addr;
1835 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) {
1840 entry = addr_crc(a);
1843 table[entry >> 2] |= 1 << (8 * (entry & 3));
1846 for (i = 0; i < 0x100; i += 4) {
1847 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]);
1848 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]);
1854 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1856 mv643xx_eth_program_unicast_filter(dev);
1857 mv643xx_eth_program_multicast_filter(dev);
1860 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1862 struct sockaddr *sa = addr;
1864 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
1866 netif_addr_lock_bh(dev);
1867 mv643xx_eth_program_unicast_filter(dev);
1868 netif_addr_unlock_bh(dev);
1874 /* rx/tx queue initialisation ***********************************************/
1875 static int rxq_init(struct mv643xx_eth_private *mp, int index)
1877 struct rx_queue *rxq = mp->rxq + index;
1878 struct rx_desc *rx_desc;
1884 rxq->rx_ring_size = mp->rx_ring_size;
1886 rxq->rx_desc_count = 0;
1887 rxq->rx_curr_desc = 0;
1888 rxq->rx_used_desc = 0;
1890 size = rxq->rx_ring_size * sizeof(struct rx_desc);
1892 if (index == 0 && size <= mp->rx_desc_sram_size) {
1893 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr,
1894 mp->rx_desc_sram_size);
1895 rxq->rx_desc_dma = mp->rx_desc_sram_addr;
1897 rxq->rx_desc_area = dma_alloc_coherent(NULL, size,
1902 if (rxq->rx_desc_area == NULL) {
1903 dev_printk(KERN_ERR, &mp->dev->dev,
1904 "can't allocate rx ring (%d bytes)\n", size);
1907 memset(rxq->rx_desc_area, 0, size);
1909 rxq->rx_desc_area_size = size;
1910 rxq->rx_skb = kmalloc(rxq->rx_ring_size * sizeof(*rxq->rx_skb),
1912 if (rxq->rx_skb == NULL) {
1913 dev_printk(KERN_ERR, &mp->dev->dev,
1914 "can't allocate rx skb ring\n");
1918 rx_desc = (struct rx_desc *)rxq->rx_desc_area;
1919 for (i = 0; i < rxq->rx_ring_size; i++) {
1923 if (nexti == rxq->rx_ring_size)
1926 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma +
1927 nexti * sizeof(struct rx_desc);
1930 rxq->lro_mgr.dev = mp->dev;
1931 memset(&rxq->lro_mgr.stats, 0, sizeof(rxq->lro_mgr.stats));
1932 rxq->lro_mgr.features = LRO_F_NAPI;
1933 rxq->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1934 rxq->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1935 rxq->lro_mgr.max_desc = ARRAY_SIZE(rxq->lro_arr);
1936 rxq->lro_mgr.max_aggr = 32;
1937 rxq->lro_mgr.frag_align_pad = 0;
1938 rxq->lro_mgr.lro_arr = rxq->lro_arr;
1939 rxq->lro_mgr.get_skb_header = mv643xx_get_skb_header;
1941 memset(&rxq->lro_arr, 0, sizeof(rxq->lro_arr));
1947 if (index == 0 && size <= mp->rx_desc_sram_size)
1948 iounmap(rxq->rx_desc_area);
1950 dma_free_coherent(NULL, size,
1958 static void rxq_deinit(struct rx_queue *rxq)
1960 struct mv643xx_eth_private *mp = rxq_to_mp(rxq);
1965 for (i = 0; i < rxq->rx_ring_size; i++) {
1966 if (rxq->rx_skb[i]) {
1967 dev_kfree_skb(rxq->rx_skb[i]);
1968 rxq->rx_desc_count--;
1972 if (rxq->rx_desc_count) {
1973 dev_printk(KERN_ERR, &mp->dev->dev,
1974 "error freeing rx ring -- %d skbs stuck\n",
1975 rxq->rx_desc_count);
1978 if (rxq->index == 0 &&
1979 rxq->rx_desc_area_size <= mp->rx_desc_sram_size)
1980 iounmap(rxq->rx_desc_area);
1982 dma_free_coherent(NULL, rxq->rx_desc_area_size,
1983 rxq->rx_desc_area, rxq->rx_desc_dma);
1988 static int txq_init(struct mv643xx_eth_private *mp, int index)
1990 struct tx_queue *txq = mp->txq + index;
1991 struct tx_desc *tx_desc;
1997 txq->tx_ring_size = mp->tx_ring_size;
1999 txq->tx_desc_count = 0;
2000 txq->tx_curr_desc = 0;
2001 txq->tx_used_desc = 0;
2003 size = txq->tx_ring_size * sizeof(struct tx_desc);
2005 if (index == 0 && size <= mp->tx_desc_sram_size) {
2006 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr,
2007 mp->tx_desc_sram_size);
2008 txq->tx_desc_dma = mp->tx_desc_sram_addr;
2010 txq->tx_desc_area = dma_alloc_coherent(NULL, size,
2015 if (txq->tx_desc_area == NULL) {
2016 dev_printk(KERN_ERR, &mp->dev->dev,
2017 "can't allocate tx ring (%d bytes)\n", size);
2020 memset(txq->tx_desc_area, 0, size);
2022 txq->tx_desc_area_size = size;
2024 tx_desc = (struct tx_desc *)txq->tx_desc_area;
2025 for (i = 0; i < txq->tx_ring_size; i++) {
2026 struct tx_desc *txd = tx_desc + i;
2030 if (nexti == txq->tx_ring_size)
2034 txd->next_desc_ptr = txq->tx_desc_dma +
2035 nexti * sizeof(struct tx_desc);
2038 skb_queue_head_init(&txq->tx_skb);
2043 static void txq_deinit(struct tx_queue *txq)
2045 struct mv643xx_eth_private *mp = txq_to_mp(txq);
2048 txq_reclaim(txq, txq->tx_ring_size, 1);
2050 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc);
2052 if (txq->index == 0 &&
2053 txq->tx_desc_area_size <= mp->tx_desc_sram_size)
2054 iounmap(txq->tx_desc_area);
2056 dma_free_coherent(NULL, txq->tx_desc_area_size,
2057 txq->tx_desc_area, txq->tx_desc_dma);
2061 /* netdev ops and related ***************************************************/
2062 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp)
2067 int_cause = rdlp(mp, INT_CAUSE) & (INT_TX_END | INT_RX | INT_EXT);
2072 if (int_cause & INT_EXT)
2073 int_cause_ext = rdlp(mp, INT_CAUSE_EXT);
2075 int_cause &= INT_TX_END | INT_RX;
2077 wrlp(mp, INT_CAUSE, ~int_cause);
2078 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) &
2079 ~(rdlp(mp, TXQ_COMMAND) & 0xff);
2080 mp->work_rx |= (int_cause & INT_RX) >> 2;
2083 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX;
2084 if (int_cause_ext) {
2085 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext);
2086 if (int_cause_ext & INT_EXT_LINK_PHY)
2088 mp->work_tx |= int_cause_ext & INT_EXT_TX;
2094 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
2096 struct net_device *dev = (struct net_device *)dev_id;
2097 struct mv643xx_eth_private *mp = netdev_priv(dev);
2099 if (unlikely(!mv643xx_eth_collect_events(mp)))
2102 wrlp(mp, INT_MASK, 0);
2103 napi_schedule(&mp->napi);
2108 static void handle_link_event(struct mv643xx_eth_private *mp)
2110 struct net_device *dev = mp->dev;
2116 port_status = rdlp(mp, PORT_STATUS);
2117 if (!(port_status & LINK_UP)) {
2118 if (netif_carrier_ok(dev)) {
2121 printk(KERN_INFO "%s: link down\n", dev->name);
2123 netif_carrier_off(dev);
2125 for (i = 0; i < mp->txq_count; i++) {
2126 struct tx_queue *txq = mp->txq + i;
2128 txq_reclaim(txq, txq->tx_ring_size, 1);
2129 txq_reset_hw_ptr(txq);
2135 switch (port_status & PORT_SPEED_MASK) {
2139 case PORT_SPEED_100:
2142 case PORT_SPEED_1000:
2149 duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
2150 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
2152 printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
2153 "flow control %sabled\n", dev->name,
2154 speed, duplex ? "full" : "half",
2157 if (!netif_carrier_ok(dev))
2158 netif_carrier_on(dev);
2161 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
2163 struct mv643xx_eth_private *mp;
2166 mp = container_of(napi, struct mv643xx_eth_private, napi);
2168 if (unlikely(mp->oom)) {
2170 del_timer(&mp->rx_oom);
2174 while (work_done < budget) {
2179 if (mp->work_link) {
2181 handle_link_event(mp);
2185 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx;
2186 if (likely(!mp->oom))
2187 queue_mask |= mp->work_rx_refill;
2190 if (mv643xx_eth_collect_events(mp))
2195 queue = fls(queue_mask) - 1;
2196 queue_mask = 1 << queue;
2198 work_tbd = budget - work_done;
2202 if (mp->work_tx_end & queue_mask) {
2203 txq_kick(mp->txq + queue);
2204 } else if (mp->work_tx & queue_mask) {
2205 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0);
2206 txq_maybe_wake(mp->txq + queue);
2207 } else if (mp->work_rx & queue_mask) {
2208 work_done += rxq_process(mp->rxq + queue, work_tbd);
2209 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) {
2210 work_done += rxq_refill(mp->rxq + queue, work_tbd);
2216 if (work_done < budget) {
2218 mod_timer(&mp->rx_oom, jiffies + (HZ / 10));
2219 napi_complete(napi);
2220 wrlp(mp, INT_MASK, INT_TX_END | INT_RX | INT_EXT);
2226 static inline void oom_timer_wrapper(unsigned long data)
2228 struct mv643xx_eth_private *mp = (void *)data;
2230 napi_schedule(&mp->napi);
2233 static void phy_reset(struct mv643xx_eth_private *mp)
2237 data = phy_read(mp->phy, MII_BMCR);
2242 if (phy_write(mp->phy, MII_BMCR, data) < 0)
2246 data = phy_read(mp->phy, MII_BMCR);
2247 } while (data >= 0 && data & BMCR_RESET);
2250 static void port_start(struct mv643xx_eth_private *mp)
2256 * Perform PHY reset, if there is a PHY.
2258 if (mp->phy != NULL) {
2259 struct ethtool_cmd cmd;
2261 mv643xx_eth_get_settings(mp->dev, &cmd);
2263 mv643xx_eth_set_settings(mp->dev, &cmd);
2267 * Configure basic link parameters.
2269 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2271 pscr |= SERIAL_PORT_ENABLE;
2272 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2274 pscr |= DO_NOT_FORCE_LINK_FAIL;
2275 if (mp->phy == NULL)
2276 pscr |= FORCE_LINK_PASS;
2277 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2280 * Configure TX path and queues.
2282 tx_set_rate(mp, 1000000000, 16777216);
2283 for (i = 0; i < mp->txq_count; i++) {
2284 struct tx_queue *txq = mp->txq + i;
2286 txq_reset_hw_ptr(txq);
2287 txq_set_rate(txq, 1000000000, 16777216);
2288 txq_set_fixed_prio_mode(txq);
2292 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
2293 * frames to RX queue #0, and include the pseudo-header when
2294 * calculating receive checksums.
2296 wrlp(mp, PORT_CONFIG, 0x02000000);
2299 * Treat BPDUs as normal multicasts, and disable partition mode.
2301 wrlp(mp, PORT_CONFIG_EXT, 0x00000000);
2304 * Add configured unicast addresses to address filter table.
2306 mv643xx_eth_program_unicast_filter(mp->dev);
2309 * Enable the receive queues.
2311 for (i = 0; i < mp->rxq_count; i++) {
2312 struct rx_queue *rxq = mp->rxq + i;
2315 addr = (u32)rxq->rx_desc_dma;
2316 addr += rxq->rx_curr_desc * sizeof(struct rx_desc);
2317 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr);
2323 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp)
2328 * Reserve 2+14 bytes for an ethernet header (the hardware
2329 * automatically prepends 2 bytes of dummy data to each
2330 * received packet), 16 bytes for up to four VLAN tags, and
2331 * 4 bytes for the trailing FCS -- 36 bytes total.
2333 skb_size = mp->dev->mtu + 36;
2336 * Make sure that the skb size is a multiple of 8 bytes, as
2337 * the lower three bits of the receive descriptor's buffer
2338 * size field are ignored by the hardware.
2340 mp->skb_size = (skb_size + 7) & ~7;
2343 static int mv643xx_eth_open(struct net_device *dev)
2345 struct mv643xx_eth_private *mp = netdev_priv(dev);
2349 wrlp(mp, INT_CAUSE, 0);
2350 wrlp(mp, INT_CAUSE_EXT, 0);
2351 rdlp(mp, INT_CAUSE_EXT);
2353 err = request_irq(dev->irq, mv643xx_eth_irq,
2354 IRQF_SHARED, dev->name, dev);
2356 dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n");
2360 mv643xx_eth_recalc_skb_size(mp);
2362 napi_enable(&mp->napi);
2364 skb_queue_head_init(&mp->rx_recycle);
2366 for (i = 0; i < mp->rxq_count; i++) {
2367 err = rxq_init(mp, i);
2370 rxq_deinit(mp->rxq + i);
2374 rxq_refill(mp->rxq + i, INT_MAX);
2378 mp->rx_oom.expires = jiffies + (HZ / 10);
2379 add_timer(&mp->rx_oom);
2382 for (i = 0; i < mp->txq_count; i++) {
2383 err = txq_init(mp, i);
2386 txq_deinit(mp->txq + i);
2393 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX);
2394 wrlp(mp, INT_MASK, INT_TX_END | INT_RX | INT_EXT);
2400 for (i = 0; i < mp->rxq_count; i++)
2401 rxq_deinit(mp->rxq + i);
2403 free_irq(dev->irq, dev);
2408 static void port_reset(struct mv643xx_eth_private *mp)
2413 for (i = 0; i < mp->rxq_count; i++)
2414 rxq_disable(mp->rxq + i);
2415 for (i = 0; i < mp->txq_count; i++)
2416 txq_disable(mp->txq + i);
2419 u32 ps = rdlp(mp, PORT_STATUS);
2421 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY)
2426 /* Reset the Enable bit in the Configuration Register */
2427 data = rdlp(mp, PORT_SERIAL_CONTROL);
2428 data &= ~(SERIAL_PORT_ENABLE |
2429 DO_NOT_FORCE_LINK_FAIL |
2431 wrlp(mp, PORT_SERIAL_CONTROL, data);
2434 static int mv643xx_eth_stop(struct net_device *dev)
2436 struct mv643xx_eth_private *mp = netdev_priv(dev);
2439 wrlp(mp, INT_MASK_EXT, 0x00000000);
2440 wrlp(mp, INT_MASK, 0x00000000);
2443 napi_disable(&mp->napi);
2445 del_timer_sync(&mp->rx_oom);
2447 netif_carrier_off(dev);
2449 free_irq(dev->irq, dev);
2452 mv643xx_eth_get_stats(dev);
2453 mib_counters_update(mp);
2454 del_timer_sync(&mp->mib_counters_timer);
2456 skb_queue_purge(&mp->rx_recycle);
2458 for (i = 0; i < mp->rxq_count; i++)
2459 rxq_deinit(mp->rxq + i);
2460 for (i = 0; i < mp->txq_count; i++)
2461 txq_deinit(mp->txq + i);
2466 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2468 struct mv643xx_eth_private *mp = netdev_priv(dev);
2470 if (mp->phy != NULL)
2471 return phy_mii_ioctl(mp->phy, if_mii(ifr), cmd);
2476 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
2478 struct mv643xx_eth_private *mp = netdev_priv(dev);
2480 if (new_mtu < 64 || new_mtu > 9500)
2484 mv643xx_eth_recalc_skb_size(mp);
2485 tx_set_rate(mp, 1000000000, 16777216);
2487 if (!netif_running(dev))
2491 * Stop and then re-open the interface. This will allocate RX
2492 * skbs of the new MTU.
2493 * There is a possible danger that the open will not succeed,
2494 * due to memory being full.
2496 mv643xx_eth_stop(dev);
2497 if (mv643xx_eth_open(dev)) {
2498 dev_printk(KERN_ERR, &dev->dev,
2499 "fatal error on re-opening device after "
2506 static void tx_timeout_task(struct work_struct *ugly)
2508 struct mv643xx_eth_private *mp;
2510 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task);
2511 if (netif_running(mp->dev)) {
2512 netif_tx_stop_all_queues(mp->dev);
2515 netif_tx_wake_all_queues(mp->dev);
2519 static void mv643xx_eth_tx_timeout(struct net_device *dev)
2521 struct mv643xx_eth_private *mp = netdev_priv(dev);
2523 dev_printk(KERN_INFO, &dev->dev, "tx timeout\n");
2525 schedule_work(&mp->tx_timeout_task);
2528 #ifdef CONFIG_NET_POLL_CONTROLLER
2529 static void mv643xx_eth_netpoll(struct net_device *dev)
2531 struct mv643xx_eth_private *mp = netdev_priv(dev);
2533 wrlp(mp, INT_MASK, 0x00000000);
2536 mv643xx_eth_irq(dev->irq, dev);
2538 wrlp(mp, INT_MASK, INT_TX_END | INT_RX | INT_EXT);
2543 /* platform glue ************************************************************/
2545 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2546 struct mbus_dram_target_info *dram)
2548 void __iomem *base = msp->base;
2553 for (i = 0; i < 6; i++) {
2554 writel(0, base + WINDOW_BASE(i));
2555 writel(0, base + WINDOW_SIZE(i));
2557 writel(0, base + WINDOW_REMAP_HIGH(i));
2563 for (i = 0; i < dram->num_cs; i++) {
2564 struct mbus_dram_window *cs = dram->cs + i;
2566 writel((cs->base & 0xffff0000) |
2567 (cs->mbus_attr << 8) |
2568 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2569 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2571 win_enable &= ~(1 << i);
2572 win_protect |= 3 << (2 * i);
2575 writel(win_enable, base + WINDOW_BAR_ENABLE);
2576 msp->win_protect = win_protect;
2579 static void infer_hw_params(struct mv643xx_eth_shared_private *msp)
2582 * Check whether we have a 14-bit coal limit field in bits
2583 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the
2584 * SDMA config register.
2586 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG);
2587 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000)
2588 msp->extended_rx_coal_limit = 1;
2590 msp->extended_rx_coal_limit = 0;
2593 * Check whether the MAC supports TX rate control, and if
2594 * yes, whether its associated registers are in the old or
2597 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED);
2598 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) {
2599 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT;
2601 writel(7, msp->base + 0x0400 + TX_BW_RATE);
2602 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7)
2603 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT;
2605 msp->tx_bw_control = TX_BW_CONTROL_ABSENT;
2609 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2611 static int mv643xx_eth_version_printed;
2612 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2613 struct mv643xx_eth_shared_private *msp;
2614 struct resource *res;
2617 if (!mv643xx_eth_version_printed++)
2618 printk(KERN_NOTICE "MV-643xx 10/100/1000 ethernet "
2619 "driver version %s\n", mv643xx_eth_driver_version);
2622 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2627 msp = kmalloc(sizeof(*msp), GFP_KERNEL);
2630 memset(msp, 0, sizeof(*msp));
2632 msp->base = ioremap(res->start, res->end - res->start + 1);
2633 if (msp->base == NULL)
2637 * Set up and register SMI bus.
2639 if (pd == NULL || pd->shared_smi == NULL) {
2640 msp->smi_bus = mdiobus_alloc();
2641 if (msp->smi_bus == NULL)
2644 msp->smi_bus->priv = msp;
2645 msp->smi_bus->name = "mv643xx_eth smi";
2646 msp->smi_bus->read = smi_bus_read;
2647 msp->smi_bus->write = smi_bus_write,
2648 snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
2649 msp->smi_bus->parent = &pdev->dev;
2650 msp->smi_bus->phy_mask = 0xffffffff;
2651 if (mdiobus_register(msp->smi_bus) < 0)
2652 goto out_free_mii_bus;
2655 msp->smi = platform_get_drvdata(pd->shared_smi);
2658 msp->err_interrupt = NO_IRQ;
2659 init_waitqueue_head(&msp->smi_busy_wait);
2662 * Check whether the error interrupt is hooked up.
2664 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2668 err = request_irq(res->start, mv643xx_eth_err_irq,
2669 IRQF_SHARED, "mv643xx_eth", msp);
2671 writel(ERR_INT_SMI_DONE, msp->base + ERR_INT_MASK);
2672 msp->err_interrupt = res->start;
2677 * (Re-)program MBUS remapping windows if we are asked to.
2679 if (pd != NULL && pd->dram != NULL)
2680 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2683 * Detect hardware parameters.
2685 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2686 infer_hw_params(msp);
2688 platform_set_drvdata(pdev, msp);
2693 mdiobus_free(msp->smi_bus);
2702 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2704 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2705 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2707 if (pd == NULL || pd->shared_smi == NULL) {
2708 mdiobus_unregister(msp->smi_bus);
2709 mdiobus_free(msp->smi_bus);
2711 if (msp->err_interrupt != NO_IRQ)
2712 free_irq(msp->err_interrupt, msp);
2719 static struct platform_driver mv643xx_eth_shared_driver = {
2720 .probe = mv643xx_eth_shared_probe,
2721 .remove = mv643xx_eth_shared_remove,
2723 .name = MV643XX_ETH_SHARED_NAME,
2724 .owner = THIS_MODULE,
2728 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2730 int addr_shift = 5 * mp->port_num;
2733 data = rdl(mp, PHY_ADDR);
2734 data &= ~(0x1f << addr_shift);
2735 data |= (phy_addr & 0x1f) << addr_shift;
2736 wrl(mp, PHY_ADDR, data);
2739 static int phy_addr_get(struct mv643xx_eth_private *mp)
2743 data = rdl(mp, PHY_ADDR);
2745 return (data >> (5 * mp->port_num)) & 0x1f;
2748 static void set_params(struct mv643xx_eth_private *mp,
2749 struct mv643xx_eth_platform_data *pd)
2751 struct net_device *dev = mp->dev;
2753 if (is_valid_ether_addr(pd->mac_addr))
2754 memcpy(dev->dev_addr, pd->mac_addr, 6);
2756 uc_addr_get(mp, dev->dev_addr);
2758 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2759 if (pd->rx_queue_size)
2760 mp->rx_ring_size = pd->rx_queue_size;
2761 mp->rx_desc_sram_addr = pd->rx_sram_addr;
2762 mp->rx_desc_sram_size = pd->rx_sram_size;
2764 mp->rxq_count = pd->rx_queue_count ? : 1;
2766 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2767 if (pd->tx_queue_size)
2768 mp->tx_ring_size = pd->tx_queue_size;
2769 mp->tx_desc_sram_addr = pd->tx_sram_addr;
2770 mp->tx_desc_sram_size = pd->tx_sram_size;
2772 mp->txq_count = pd->tx_queue_count ? : 1;
2775 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
2778 struct mii_bus *bus = mp->shared->smi->smi_bus;
2779 struct phy_device *phydev;
2784 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) {
2785 start = phy_addr_get(mp) & 0x1f;
2788 start = phy_addr & 0x1f;
2793 for (i = 0; i < num; i++) {
2794 int addr = (start + i) & 0x1f;
2796 if (bus->phy_map[addr] == NULL)
2797 mdiobus_scan(bus, addr);
2799 if (phydev == NULL) {
2800 phydev = bus->phy_map[addr];
2802 phy_addr_set(mp, addr);
2809 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex)
2811 struct phy_device *phy = mp->phy;
2815 phy_attach(mp->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_GMII);
2818 phy->autoneg = AUTONEG_ENABLE;
2821 phy->advertising = phy->supported | ADVERTISED_Autoneg;
2823 phy->autoneg = AUTONEG_DISABLE;
2824 phy->advertising = 0;
2826 phy->duplex = duplex;
2828 phy_start_aneg(phy);
2831 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex)
2835 pscr = rdlp(mp, PORT_SERIAL_CONTROL);
2836 if (pscr & SERIAL_PORT_ENABLE) {
2837 pscr &= ~SERIAL_PORT_ENABLE;
2838 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2841 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED;
2842 if (mp->phy == NULL) {
2843 pscr |= DISABLE_AUTO_NEG_SPEED_GMII;
2844 if (speed == SPEED_1000)
2845 pscr |= SET_GMII_SPEED_TO_1000;
2846 else if (speed == SPEED_100)
2847 pscr |= SET_MII_SPEED_TO_100;
2849 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL;
2851 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX;
2852 if (duplex == DUPLEX_FULL)
2853 pscr |= SET_FULL_DUPLEX_MODE;
2856 wrlp(mp, PORT_SERIAL_CONTROL, pscr);
2859 static const struct net_device_ops mv643xx_eth_netdev_ops = {
2860 .ndo_open = mv643xx_eth_open,
2861 .ndo_stop = mv643xx_eth_stop,
2862 .ndo_start_xmit = mv643xx_eth_xmit,
2863 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode,
2864 .ndo_set_mac_address = mv643xx_eth_set_mac_address,
2865 .ndo_do_ioctl = mv643xx_eth_ioctl,
2866 .ndo_change_mtu = mv643xx_eth_change_mtu,
2867 .ndo_tx_timeout = mv643xx_eth_tx_timeout,
2868 .ndo_get_stats = mv643xx_eth_get_stats,
2869 #ifdef CONFIG_NET_POLL_CONTROLLER
2870 .ndo_poll_controller = mv643xx_eth_netpoll,
2874 static int mv643xx_eth_probe(struct platform_device *pdev)
2876 struct mv643xx_eth_platform_data *pd;
2877 struct mv643xx_eth_private *mp;
2878 struct net_device *dev;
2879 struct resource *res;
2882 pd = pdev->dev.platform_data;
2884 dev_printk(KERN_ERR, &pdev->dev,
2885 "no mv643xx_eth_platform_data\n");
2889 if (pd->shared == NULL) {
2890 dev_printk(KERN_ERR, &pdev->dev,
2891 "no mv643xx_eth_platform_data->shared\n");
2895 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8);
2899 mp = netdev_priv(dev);
2900 platform_set_drvdata(pdev, mp);
2902 mp->shared = platform_get_drvdata(pd->shared);
2903 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10);
2904 mp->port_num = pd->port_number;
2909 dev->real_num_tx_queues = mp->txq_count;
2911 if (pd->phy_addr != MV643XX_ETH_PHY_NONE)
2912 mp->phy = phy_scan(mp, pd->phy_addr);
2914 if (mp->phy != NULL)
2915 phy_init(mp, pd->speed, pd->duplex);
2917 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2919 init_pscr(mp, pd->speed, pd->duplex);
2922 mib_counters_clear(mp);
2924 init_timer(&mp->mib_counters_timer);
2925 mp->mib_counters_timer.data = (unsigned long)mp;
2926 mp->mib_counters_timer.function = mib_counters_timer_wrapper;
2927 mp->mib_counters_timer.expires = jiffies + 30 * HZ;
2928 add_timer(&mp->mib_counters_timer);
2930 spin_lock_init(&mp->mib_counters_lock);
2932 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
2934 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 128);
2936 init_timer(&mp->rx_oom);
2937 mp->rx_oom.data = (unsigned long)mp;
2938 mp->rx_oom.function = oom_timer_wrapper;
2941 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2943 dev->irq = res->start;
2945 dev->netdev_ops = &mv643xx_eth_netdev_ops;
2947 dev->watchdog_timeo = 2 * HZ;
2950 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2951 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM;
2953 SET_NETDEV_DEV(dev, &pdev->dev);
2955 if (mp->shared->win_protect)
2956 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect);
2958 netif_carrier_off(dev);
2960 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE);
2962 set_rx_coal(mp, 250);
2965 err = register_netdev(dev);
2969 dev_printk(KERN_NOTICE, &dev->dev, "port %d with MAC address %pM\n",
2970 mp->port_num, dev->dev_addr);
2972 if (mp->tx_desc_sram_size > 0)
2973 dev_printk(KERN_NOTICE, &dev->dev, "configured with sram\n");
2983 static int mv643xx_eth_remove(struct platform_device *pdev)
2985 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
2987 unregister_netdev(mp->dev);
2988 if (mp->phy != NULL)
2989 phy_detach(mp->phy);
2990 flush_scheduled_work();
2991 free_netdev(mp->dev);
2993 platform_set_drvdata(pdev, NULL);
2998 static void mv643xx_eth_shutdown(struct platform_device *pdev)
3000 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev);
3002 /* Mask all interrupts on ethernet port */
3003 wrlp(mp, INT_MASK, 0);
3006 if (netif_running(mp->dev))
3010 static struct platform_driver mv643xx_eth_driver = {
3011 .probe = mv643xx_eth_probe,
3012 .remove = mv643xx_eth_remove,
3013 .shutdown = mv643xx_eth_shutdown,
3015 .name = MV643XX_ETH_NAME,
3016 .owner = THIS_MODULE,
3020 static int __init mv643xx_eth_init_module(void)
3024 rc = platform_driver_register(&mv643xx_eth_shared_driver);
3026 rc = platform_driver_register(&mv643xx_eth_driver);
3028 platform_driver_unregister(&mv643xx_eth_shared_driver);
3033 module_init(mv643xx_eth_init_module);
3035 static void __exit mv643xx_eth_cleanup_module(void)
3037 platform_driver_unregister(&mv643xx_eth_driver);
3038 platform_driver_unregister(&mv643xx_eth_shared_driver);
3040 module_exit(mv643xx_eth_cleanup_module);
3042 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, "
3043 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek");
3044 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
3045 MODULE_LICENSE("GPL");
3046 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);
3047 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);