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>
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>
54 #include <asm/types.h>
55 #include <asm/system.h>
57 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
58 static char mv643xx_eth_driver_version[] = "1.0";
60 #define MV643XX_ETH_CHECKSUM_OFFLOAD_TX
61 #define MV643XX_ETH_NAPI
62 #define MV643XX_ETH_TX_FAST_REFILL
63 #undef MV643XX_ETH_COAL
65 #define MV643XX_ETH_TX_COAL 100
66 #ifdef MV643XX_ETH_COAL
67 #define MV643XX_ETH_RX_COAL 100
70 #ifdef MV643XX_ETH_CHECKSUM_OFFLOAD_TX
71 #define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1)
73 #define MAX_DESCS_PER_SKB 1
76 #define ETH_VLAN_HLEN 4
78 #define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */
79 #define ETH_WRAPPER_LEN (ETH_HW_IP_ALIGN + ETH_HLEN + \
80 ETH_VLAN_HLEN + ETH_FCS_LEN)
81 #define ETH_RX_SKB_SIZE (dev->mtu + ETH_WRAPPER_LEN + \
82 dma_get_cache_alignment())
85 * Registers shared between all ports.
87 #define PHY_ADDR 0x0000
88 #define SMI_REG 0x0004
89 #define WINDOW_BASE(w) (0x0200 + ((w) << 3))
90 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3))
91 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2))
92 #define WINDOW_BAR_ENABLE 0x0290
93 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4))
98 #define PORT_CONFIG(p) (0x0400 + ((p) << 10))
99 #define UNICAST_PROMISCUOUS_MODE 0x00000001
100 #define PORT_CONFIG_EXT(p) (0x0404 + ((p) << 10))
101 #define MAC_ADDR_LOW(p) (0x0414 + ((p) << 10))
102 #define MAC_ADDR_HIGH(p) (0x0418 + ((p) << 10))
103 #define SDMA_CONFIG(p) (0x041c + ((p) << 10))
104 #define PORT_SERIAL_CONTROL(p) (0x043c + ((p) << 10))
105 #define PORT_STATUS(p) (0x0444 + ((p) << 10))
106 #define TX_FIFO_EMPTY 0x00000400
107 #define TXQ_COMMAND(p) (0x0448 + ((p) << 10))
108 #define TX_BW_MTU(p) (0x0458 + ((p) << 10))
109 #define INT_CAUSE(p) (0x0460 + ((p) << 10))
110 #define INT_RX 0x00000804
111 #define INT_EXT 0x00000002
112 #define INT_CAUSE_EXT(p) (0x0464 + ((p) << 10))
113 #define INT_EXT_LINK 0x00100000
114 #define INT_EXT_PHY 0x00010000
115 #define INT_EXT_TX_ERROR_0 0x00000100
116 #define INT_EXT_TX_0 0x00000001
117 #define INT_EXT_TX 0x00000101
118 #define INT_MASK(p) (0x0468 + ((p) << 10))
119 #define INT_MASK_EXT(p) (0x046c + ((p) << 10))
120 #define TX_FIFO_URGENT_THRESHOLD(p) (0x0474 + ((p) << 10))
121 #define RXQ_CURRENT_DESC_PTR(p) (0x060c + ((p) << 10))
122 #define RXQ_COMMAND(p) (0x0680 + ((p) << 10))
123 #define TXQ_CURRENT_DESC_PTR(p) (0x06c0 + ((p) << 10))
124 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7))
125 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10))
126 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10))
127 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10))
131 * SDMA configuration register.
133 #define RX_BURST_SIZE_4_64BIT (2 << 1)
134 #define BLM_RX_NO_SWAP (1 << 4)
135 #define BLM_TX_NO_SWAP (1 << 5)
136 #define TX_BURST_SIZE_4_64BIT (2 << 22)
138 #if defined(__BIG_ENDIAN)
139 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
140 RX_BURST_SIZE_4_64BIT | \
141 TX_BURST_SIZE_4_64BIT
142 #elif defined(__LITTLE_ENDIAN)
143 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \
144 RX_BURST_SIZE_4_64BIT | \
147 TX_BURST_SIZE_4_64BIT
149 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
154 * Port serial control register.
156 #define SET_MII_SPEED_TO_100 (1 << 24)
157 #define SET_GMII_SPEED_TO_1000 (1 << 23)
158 #define SET_FULL_DUPLEX_MODE (1 << 21)
159 #define MAX_RX_PACKET_1522BYTE (1 << 17)
160 #define MAX_RX_PACKET_9700BYTE (5 << 17)
161 #define MAX_RX_PACKET_MASK (7 << 17)
162 #define DISABLE_AUTO_NEG_SPEED_GMII (1 << 13)
163 #define DO_NOT_FORCE_LINK_FAIL (1 << 10)
164 #define SERIAL_PORT_CONTROL_RESERVED (1 << 9)
165 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL (1 << 3)
166 #define DISABLE_AUTO_NEG_FOR_DUPLEX (1 << 2)
167 #define FORCE_LINK_PASS (1 << 1)
168 #define SERIAL_PORT_ENABLE (1 << 0)
170 #define DEFAULT_RX_QUEUE_SIZE 400
171 #define DEFAULT_TX_QUEUE_SIZE 800
174 #define SMI_BUSY 0x10000000 /* 0 - Write, 1 - Read */
175 #define SMI_READ_VALID 0x08000000 /* 0 - Write, 1 - Read */
176 #define SMI_OPCODE_WRITE 0 /* Completion of Read */
177 #define SMI_OPCODE_READ 0x04000000 /* Operation is in progress */
181 typedef enum _func_ret_status {
182 ETH_OK, /* Returned as expected. */
183 ETH_ERROR, /* Fundamental error. */
184 ETH_RETRY, /* Could not process request. Try later.*/
185 ETH_END_OF_JOB, /* Ring has nothing to process. */
186 ETH_QUEUE_FULL, /* Ring resource error. */
187 ETH_QUEUE_LAST_RESOURCE /* Ring resources about to exhaust. */
193 #if defined(__BIG_ENDIAN)
195 u16 byte_cnt; /* Descriptor buffer byte count */
196 u16 buf_size; /* Buffer size */
197 u32 cmd_sts; /* Descriptor command status */
198 u32 next_desc_ptr; /* Next descriptor pointer */
199 u32 buf_ptr; /* Descriptor buffer pointer */
203 u16 byte_cnt; /* buffer byte count */
204 u16 l4i_chk; /* CPU provided TCP checksum */
205 u32 cmd_sts; /* Command/status field */
206 u32 next_desc_ptr; /* Pointer to next descriptor */
207 u32 buf_ptr; /* pointer to buffer for this descriptor*/
209 #elif defined(__LITTLE_ENDIAN)
211 u32 cmd_sts; /* Descriptor command status */
212 u16 buf_size; /* Buffer size */
213 u16 byte_cnt; /* Descriptor buffer byte count */
214 u32 buf_ptr; /* Descriptor buffer pointer */
215 u32 next_desc_ptr; /* Next descriptor pointer */
219 u32 cmd_sts; /* Command/status field */
220 u16 l4i_chk; /* CPU provided TCP checksum */
221 u16 byte_cnt; /* buffer byte count */
222 u32 buf_ptr; /* pointer to buffer for this descriptor*/
223 u32 next_desc_ptr; /* Pointer to next descriptor */
226 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
229 /* RX & TX descriptor command */
230 #define BUFFER_OWNED_BY_DMA 0x80000000
232 /* RX & TX descriptor status */
233 #define ERROR_SUMMARY 0x00000001
235 /* RX descriptor status */
236 #define LAYER_4_CHECKSUM_OK 0x40000000
237 #define RX_ENABLE_INTERRUPT 0x20000000
238 #define RX_FIRST_DESC 0x08000000
239 #define RX_LAST_DESC 0x04000000
241 /* TX descriptor command */
242 #define TX_ENABLE_INTERRUPT 0x00800000
243 #define GEN_CRC 0x00400000
244 #define TX_FIRST_DESC 0x00200000
245 #define TX_LAST_DESC 0x00100000
246 #define ZERO_PADDING 0x00080000
247 #define GEN_IP_V4_CHECKSUM 0x00040000
248 #define GEN_TCP_UDP_CHECKSUM 0x00020000
249 #define UDP_FRAME 0x00010000
251 #define TX_IHL_SHIFT 11
254 /* Unified struct for Rx and Tx operations. The user is not required to */
255 /* be familier with neither Tx nor Rx descriptors. */
257 unsigned short byte_cnt; /* Descriptor buffer byte count */
258 unsigned short l4i_chk; /* Tx CPU provided TCP Checksum */
259 unsigned int cmd_sts; /* Descriptor command status */
260 dma_addr_t buf_ptr; /* Descriptor buffer pointer */
261 struct sk_buff *return_info; /* User resource return information */
265 /* global *******************************************************************/
266 struct mv643xx_eth_shared_private {
269 /* used to protect SMI_REG, which is shared across ports */
278 /* per-port *****************************************************************/
279 struct mib_counters {
280 u64 good_octets_received;
281 u32 bad_octets_received;
282 u32 internal_mac_transmit_err;
283 u32 good_frames_received;
284 u32 bad_frames_received;
285 u32 broadcast_frames_received;
286 u32 multicast_frames_received;
287 u32 frames_64_octets;
288 u32 frames_65_to_127_octets;
289 u32 frames_128_to_255_octets;
290 u32 frames_256_to_511_octets;
291 u32 frames_512_to_1023_octets;
292 u32 frames_1024_to_max_octets;
293 u64 good_octets_sent;
294 u32 good_frames_sent;
295 u32 excessive_collision;
296 u32 multicast_frames_sent;
297 u32 broadcast_frames_sent;
298 u32 unrec_mac_control_received;
300 u32 good_fc_received;
302 u32 undersize_received;
303 u32 fragments_received;
304 u32 oversize_received;
306 u32 mac_receive_error;
312 struct mv643xx_eth_private {
313 struct mv643xx_eth_shared_private *shared;
314 int port_num; /* User Ethernet port number */
316 struct mv643xx_eth_shared_private *shared_smi;
318 u32 rx_sram_addr; /* Base address of rx sram area */
319 u32 rx_sram_size; /* Size of rx sram area */
320 u32 tx_sram_addr; /* Base address of tx sram area */
321 u32 tx_sram_size; /* Size of tx sram area */
323 /* Tx/Rx rings managment indexes fields. For driver use */
325 /* Next available and first returning Rx resource */
326 int rx_curr_desc_q, rx_used_desc_q;
328 /* Next available and first returning Tx resource */
329 int tx_curr_desc_q, tx_used_desc_q;
331 #ifdef MV643XX_ETH_TX_FAST_REFILL
332 u32 tx_clean_threshold;
335 struct rx_desc *p_rx_desc_area;
336 dma_addr_t rx_desc_dma;
337 int rx_desc_area_size;
338 struct sk_buff **rx_skb;
340 struct tx_desc *p_tx_desc_area;
341 dma_addr_t tx_desc_dma;
342 int tx_desc_area_size;
343 struct sk_buff **tx_skb;
345 struct work_struct tx_timeout_task;
347 struct net_device *dev;
348 struct napi_struct napi;
349 struct net_device_stats stats;
350 struct mib_counters mib_counters;
352 /* Size of Tx Ring per queue */
354 /* Number of tx descriptors in use */
356 /* Size of Rx Ring per queue */
358 /* Number of rx descriptors in use */
362 * Used in case RX Ring is empty, which can be caused when
363 * system does not have resources (skb's)
365 struct timer_list timeout;
369 struct mii_if_info mii;
373 /* port register accessors **************************************************/
374 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset)
376 return readl(mp->shared->base + offset);
379 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data)
381 writel(data, mp->shared->base + offset);
385 /* rxq/txq helper functions *************************************************/
386 static void mv643xx_eth_port_enable_rx(struct mv643xx_eth_private *mp,
389 wrl(mp, RXQ_COMMAND(mp->port_num), queues);
392 static unsigned int mv643xx_eth_port_disable_rx(struct mv643xx_eth_private *mp)
394 unsigned int port_num = mp->port_num;
397 /* Stop Rx port activity. Check port Rx activity. */
398 queues = rdl(mp, RXQ_COMMAND(port_num)) & 0xFF;
400 /* Issue stop command for active queues only */
401 wrl(mp, RXQ_COMMAND(port_num), (queues << 8));
403 /* Wait for all Rx activity to terminate. */
404 /* Check port cause register that all Rx queues are stopped */
405 while (rdl(mp, RXQ_COMMAND(port_num)) & 0xFF)
412 static void mv643xx_eth_port_enable_tx(struct mv643xx_eth_private *mp,
415 wrl(mp, TXQ_COMMAND(mp->port_num), queues);
418 static unsigned int mv643xx_eth_port_disable_tx(struct mv643xx_eth_private *mp)
420 unsigned int port_num = mp->port_num;
423 /* Stop Tx port activity. Check port Tx activity. */
424 queues = rdl(mp, TXQ_COMMAND(port_num)) & 0xFF;
426 /* Issue stop command for active queues only */
427 wrl(mp, TXQ_COMMAND(port_num), (queues << 8));
429 /* Wait for all Tx activity to terminate. */
430 /* Check port cause register that all Tx queues are stopped */
431 while (rdl(mp, TXQ_COMMAND(port_num)) & 0xFF)
434 /* Wait for Tx FIFO to empty */
435 while (rdl(mp, PORT_STATUS(port_num)) & TX_FIFO_EMPTY)
443 /* rx ***********************************************************************/
444 static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev);
446 static FUNC_RET_STATUS rx_return_buff(struct mv643xx_eth_private *mp,
447 struct pkt_info *p_pkt_info)
449 int used_rx_desc; /* Where to return Rx resource */
450 volatile struct rx_desc *p_used_rx_desc;
453 spin_lock_irqsave(&mp->lock, flags);
455 /* Get 'used' Rx descriptor */
456 used_rx_desc = mp->rx_used_desc_q;
457 p_used_rx_desc = &mp->p_rx_desc_area[used_rx_desc];
459 p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr;
460 p_used_rx_desc->buf_size = p_pkt_info->byte_cnt;
461 mp->rx_skb[used_rx_desc] = p_pkt_info->return_info;
463 /* Flush the write pipe */
465 /* Return the descriptor to DMA ownership */
467 p_used_rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT;
470 /* Move the used descriptor pointer to the next descriptor */
471 mp->rx_used_desc_q = (used_rx_desc + 1) % mp->rx_ring_size;
473 spin_unlock_irqrestore(&mp->lock, flags);
478 static void mv643xx_eth_rx_refill_descs(struct net_device *dev)
480 struct mv643xx_eth_private *mp = netdev_priv(dev);
481 struct pkt_info pkt_info;
485 while (mp->rx_desc_count < mp->rx_ring_size) {
486 skb = dev_alloc_skb(ETH_RX_SKB_SIZE + dma_get_cache_alignment());
490 unaligned = (u32)skb->data & (dma_get_cache_alignment() - 1);
492 skb_reserve(skb, dma_get_cache_alignment() - unaligned);
493 pkt_info.cmd_sts = RX_ENABLE_INTERRUPT;
494 pkt_info.byte_cnt = ETH_RX_SKB_SIZE;
495 pkt_info.buf_ptr = dma_map_single(NULL, skb->data,
496 ETH_RX_SKB_SIZE, DMA_FROM_DEVICE);
497 pkt_info.return_info = skb;
498 if (rx_return_buff(mp, &pkt_info) != ETH_OK) {
500 "%s: Error allocating RX Ring\n", dev->name);
503 skb_reserve(skb, ETH_HW_IP_ALIGN);
506 * If RX ring is empty of SKB, set a timer to try allocating
507 * again at a later time.
509 if (mp->rx_desc_count == 0) {
510 printk(KERN_INFO "%s: Rx ring is empty\n", dev->name);
511 mp->timeout.expires = jiffies + (HZ / 10); /* 100 mSec */
512 add_timer(&mp->timeout);
516 static inline void mv643xx_eth_rx_refill_descs_timer_wrapper(unsigned long data)
518 mv643xx_eth_rx_refill_descs((struct net_device *)data);
521 static FUNC_RET_STATUS port_receive(struct mv643xx_eth_private *mp,
522 struct pkt_info *p_pkt_info)
524 int rx_next_curr_desc, rx_curr_desc, rx_used_desc;
525 volatile struct rx_desc *p_rx_desc;
526 unsigned int command_status;
529 spin_lock_irqsave(&mp->lock, flags);
531 /* Get the Rx Desc ring 'curr and 'used' indexes */
532 rx_curr_desc = mp->rx_curr_desc_q;
533 rx_used_desc = mp->rx_used_desc_q;
535 p_rx_desc = &mp->p_rx_desc_area[rx_curr_desc];
537 /* The following parameters are used to save readings from memory */
538 command_status = p_rx_desc->cmd_sts;
541 /* Nothing to receive... */
542 if (command_status & BUFFER_OWNED_BY_DMA) {
543 spin_unlock_irqrestore(&mp->lock, flags);
544 return ETH_END_OF_JOB;
547 p_pkt_info->byte_cnt = p_rx_desc->byte_cnt - ETH_HW_IP_ALIGN;
548 p_pkt_info->cmd_sts = command_status;
549 p_pkt_info->buf_ptr = p_rx_desc->buf_ptr + ETH_HW_IP_ALIGN;
550 p_pkt_info->return_info = mp->rx_skb[rx_curr_desc];
551 p_pkt_info->l4i_chk = p_rx_desc->buf_size;
554 * Clean the return info field to indicate that the
555 * packet has been moved to the upper layers
557 mp->rx_skb[rx_curr_desc] = NULL;
559 /* Update current index in data structure */
560 rx_next_curr_desc = (rx_curr_desc + 1) % mp->rx_ring_size;
561 mp->rx_curr_desc_q = rx_next_curr_desc;
563 spin_unlock_irqrestore(&mp->lock, flags);
568 static int mv643xx_eth_receive_queue(struct net_device *dev, int budget)
570 struct mv643xx_eth_private *mp = netdev_priv(dev);
571 struct net_device_stats *stats = &dev->stats;
572 unsigned int received_packets = 0;
574 struct pkt_info pkt_info;
576 while (budget-- > 0 && port_receive(mp, &pkt_info) == ETH_OK) {
577 dma_unmap_single(NULL, pkt_info.buf_ptr, ETH_RX_SKB_SIZE,
584 * Note byte count includes 4 byte CRC count
587 stats->rx_bytes += pkt_info.byte_cnt;
588 skb = pkt_info.return_info;
590 * In case received a packet without first / last bits on OR
591 * the error summary bit is on, the packets needs to be dropeed.
593 if (((pkt_info.cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
594 (RX_FIRST_DESC | RX_LAST_DESC))
595 || (pkt_info.cmd_sts & ERROR_SUMMARY)) {
597 if ((pkt_info.cmd_sts & (RX_FIRST_DESC |
599 (RX_FIRST_DESC | RX_LAST_DESC)) {
602 "%s: Received packet spread "
603 "on multiple descriptors\n",
606 if (pkt_info.cmd_sts & ERROR_SUMMARY)
609 dev_kfree_skb_irq(skb);
612 * The -4 is for the CRC in the trailer of the
615 skb_put(skb, pkt_info.byte_cnt - 4);
617 if (pkt_info.cmd_sts & LAYER_4_CHECKSUM_OK) {
618 skb->ip_summed = CHECKSUM_UNNECESSARY;
620 (pkt_info.cmd_sts & 0x0007fff8) >> 3);
622 skb->protocol = eth_type_trans(skb, dev);
623 #ifdef MV643XX_ETH_NAPI
624 netif_receive_skb(skb);
629 dev->last_rx = jiffies;
631 mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
633 return received_packets;
636 #ifdef MV643XX_ETH_NAPI
637 static int mv643xx_eth_poll(struct napi_struct *napi, int budget)
639 struct mv643xx_eth_private *mp = container_of(napi, struct mv643xx_eth_private, napi);
640 struct net_device *dev = mp->dev;
641 unsigned int port_num = mp->port_num;
644 #ifdef MV643XX_ETH_TX_FAST_REFILL
645 if (++mp->tx_clean_threshold > 5) {
646 mv643xx_eth_free_completed_tx_descs(dev);
647 mp->tx_clean_threshold = 0;
652 if ((rdl(mp, RXQ_CURRENT_DESC_PTR(port_num)))
653 != (u32) mp->rx_used_desc_q)
654 work_done = mv643xx_eth_receive_queue(dev, budget);
656 if (work_done < budget) {
657 netif_rx_complete(dev, napi);
658 wrl(mp, INT_CAUSE(port_num), 0);
659 wrl(mp, INT_CAUSE_EXT(port_num), 0);
660 wrl(mp, INT_MASK(port_num), INT_RX | INT_EXT);
668 /* tx ***********************************************************************/
669 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
674 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
675 fragp = &skb_shinfo(skb)->frags[frag];
676 if (fragp->size <= 8 && fragp->page_offset & 0x7)
682 static int alloc_tx_desc_index(struct mv643xx_eth_private *mp)
686 BUG_ON(mp->tx_desc_count >= mp->tx_ring_size);
688 tx_desc_curr = mp->tx_curr_desc_q;
689 mp->tx_curr_desc_q = (tx_desc_curr + 1) % mp->tx_ring_size;
691 BUG_ON(mp->tx_curr_desc_q == mp->tx_used_desc_q);
696 static void tx_fill_frag_descs(struct mv643xx_eth_private *mp,
701 struct tx_desc *desc;
703 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
704 skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
706 tx_index = alloc_tx_desc_index(mp);
707 desc = &mp->p_tx_desc_area[tx_index];
709 desc->cmd_sts = BUFFER_OWNED_BY_DMA;
710 /* Last Frag enables interrupt and frees the skb */
711 if (frag == (skb_shinfo(skb)->nr_frags - 1)) {
712 desc->cmd_sts |= ZERO_PADDING |
715 mp->tx_skb[tx_index] = skb;
717 mp->tx_skb[tx_index] = NULL;
719 desc = &mp->p_tx_desc_area[tx_index];
721 desc->byte_cnt = this_frag->size;
722 desc->buf_ptr = dma_map_page(NULL, this_frag->page,
723 this_frag->page_offset,
729 static inline __be16 sum16_as_be(__sum16 sum)
731 return (__force __be16)sum;
734 static void tx_submit_descs_for_skb(struct mv643xx_eth_private *mp,
738 struct tx_desc *desc;
741 int nr_frags = skb_shinfo(skb)->nr_frags;
743 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA;
745 tx_index = alloc_tx_desc_index(mp);
746 desc = &mp->p_tx_desc_area[tx_index];
749 tx_fill_frag_descs(mp, skb);
751 length = skb_headlen(skb);
752 mp->tx_skb[tx_index] = NULL;
754 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT;
756 mp->tx_skb[tx_index] = skb;
759 desc->byte_cnt = length;
760 desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE);
762 if (skb->ip_summed == CHECKSUM_PARTIAL) {
763 BUG_ON(skb->protocol != htons(ETH_P_IP));
765 cmd_sts |= GEN_TCP_UDP_CHECKSUM |
767 ip_hdr(skb)->ihl << TX_IHL_SHIFT;
769 switch (ip_hdr(skb)->protocol) {
771 cmd_sts |= UDP_FRAME;
772 desc->l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check));
775 desc->l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check));
781 /* Errata BTS #50, IHL must be 5 if no HW checksum */
782 cmd_sts |= 5 << TX_IHL_SHIFT;
786 /* ensure all other descriptors are written before first cmd_sts */
788 desc->cmd_sts = cmd_sts;
790 /* ensure all descriptors are written before poking hardware */
792 mv643xx_eth_port_enable_tx(mp, 1);
794 mp->tx_desc_count += nr_frags + 1;
797 static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
799 struct mv643xx_eth_private *mp = netdev_priv(dev);
800 struct net_device_stats *stats = &dev->stats;
803 BUG_ON(netif_queue_stopped(dev));
805 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
807 printk(KERN_DEBUG "%s: failed to linearize tiny "
808 "unaligned fragment\n", dev->name);
809 return NETDEV_TX_BUSY;
812 spin_lock_irqsave(&mp->lock, flags);
814 if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB) {
815 printk(KERN_ERR "%s: transmit with queue full\n", dev->name);
816 netif_stop_queue(dev);
817 spin_unlock_irqrestore(&mp->lock, flags);
818 return NETDEV_TX_BUSY;
821 tx_submit_descs_for_skb(mp, skb);
822 stats->tx_bytes += skb->len;
824 dev->trans_start = jiffies;
826 if (mp->tx_ring_size - mp->tx_desc_count < MAX_DESCS_PER_SKB)
827 netif_stop_queue(dev);
829 spin_unlock_irqrestore(&mp->lock, flags);
835 /* mii management interface *************************************************/
836 static int phy_addr_get(struct mv643xx_eth_private *mp);
838 static void read_smi_reg(struct mv643xx_eth_private *mp,
839 unsigned int phy_reg, unsigned int *value)
841 void __iomem *smi_reg = mp->shared_smi->base + SMI_REG;
842 int phy_addr = phy_addr_get(mp);
846 /* the SMI register is a shared resource */
847 spin_lock_irqsave(&mp->shared_smi->phy_lock, flags);
849 /* wait for the SMI register to become available */
850 for (i = 0; readl(smi_reg) & SMI_BUSY; i++) {
852 printk("%s: PHY busy timeout\n", mp->dev->name);
858 writel((phy_addr << 16) | (phy_reg << 21) | SMI_OPCODE_READ, smi_reg);
860 /* now wait for the data to be valid */
861 for (i = 0; !(readl(smi_reg) & SMI_READ_VALID); i++) {
863 printk("%s: PHY read timeout\n", mp->dev->name);
869 *value = readl(smi_reg) & 0xffff;
871 spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags);
874 static void write_smi_reg(struct mv643xx_eth_private *mp,
875 unsigned int phy_reg, unsigned int value)
877 void __iomem *smi_reg = mp->shared_smi->base + SMI_REG;
878 int phy_addr = phy_addr_get(mp);
882 /* the SMI register is a shared resource */
883 spin_lock_irqsave(&mp->shared_smi->phy_lock, flags);
885 /* wait for the SMI register to become available */
886 for (i = 0; readl(smi_reg) & SMI_BUSY; i++) {
888 printk("%s: PHY busy timeout\n", mp->dev->name);
894 writel((phy_addr << 16) | (phy_reg << 21) |
895 SMI_OPCODE_WRITE | (value & 0xffff), smi_reg);
897 spin_unlock_irqrestore(&mp->shared_smi->phy_lock, flags);
901 /* mib counters *************************************************************/
902 static void clear_mib_counters(struct mv643xx_eth_private *mp)
904 unsigned int port_num = mp->port_num;
907 /* Perform dummy reads from MIB counters */
908 for (i = 0; i < 0x80; i += 4)
909 rdl(mp, MIB_COUNTERS(port_num) + i);
912 static inline u32 read_mib(struct mv643xx_eth_private *mp, int offset)
914 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset);
917 static void update_mib_counters(struct mv643xx_eth_private *mp)
919 struct mib_counters *p = &mp->mib_counters;
921 p->good_octets_received += read_mib(mp, 0x00);
922 p->good_octets_received += (u64)read_mib(mp, 0x04) << 32;
923 p->bad_octets_received += read_mib(mp, 0x08);
924 p->internal_mac_transmit_err += read_mib(mp, 0x0c);
925 p->good_frames_received += read_mib(mp, 0x10);
926 p->bad_frames_received += read_mib(mp, 0x14);
927 p->broadcast_frames_received += read_mib(mp, 0x18);
928 p->multicast_frames_received += read_mib(mp, 0x1c);
929 p->frames_64_octets += read_mib(mp, 0x20);
930 p->frames_65_to_127_octets += read_mib(mp, 0x24);
931 p->frames_128_to_255_octets += read_mib(mp, 0x28);
932 p->frames_256_to_511_octets += read_mib(mp, 0x2c);
933 p->frames_512_to_1023_octets += read_mib(mp, 0x30);
934 p->frames_1024_to_max_octets += read_mib(mp, 0x34);
935 p->good_octets_sent += read_mib(mp, 0x38);
936 p->good_octets_sent += (u64)read_mib(mp, 0x3c) << 32;
937 p->good_frames_sent += read_mib(mp, 0x40);
938 p->excessive_collision += read_mib(mp, 0x44);
939 p->multicast_frames_sent += read_mib(mp, 0x48);
940 p->broadcast_frames_sent += read_mib(mp, 0x4c);
941 p->unrec_mac_control_received += read_mib(mp, 0x50);
942 p->fc_sent += read_mib(mp, 0x54);
943 p->good_fc_received += read_mib(mp, 0x58);
944 p->bad_fc_received += read_mib(mp, 0x5c);
945 p->undersize_received += read_mib(mp, 0x60);
946 p->fragments_received += read_mib(mp, 0x64);
947 p->oversize_received += read_mib(mp, 0x68);
948 p->jabber_received += read_mib(mp, 0x6c);
949 p->mac_receive_error += read_mib(mp, 0x70);
950 p->bad_crc_event += read_mib(mp, 0x74);
951 p->collision += read_mib(mp, 0x78);
952 p->late_collision += read_mib(mp, 0x7c);
956 /* ethtool ******************************************************************/
957 struct mv643xx_eth_stats {
958 char stat_string[ETH_GSTRING_LEN];
963 #define MV643XX_ETH_STAT(m) FIELD_SIZEOF(struct mv643xx_eth_private, m), \
964 offsetof(struct mv643xx_eth_private, m)
966 static const struct mv643xx_eth_stats mv643xx_eth_gstrings_stats[] = {
967 { "rx_packets", MV643XX_ETH_STAT(stats.rx_packets) },
968 { "tx_packets", MV643XX_ETH_STAT(stats.tx_packets) },
969 { "rx_bytes", MV643XX_ETH_STAT(stats.rx_bytes) },
970 { "tx_bytes", MV643XX_ETH_STAT(stats.tx_bytes) },
971 { "rx_errors", MV643XX_ETH_STAT(stats.rx_errors) },
972 { "tx_errors", MV643XX_ETH_STAT(stats.tx_errors) },
973 { "rx_dropped", MV643XX_ETH_STAT(stats.rx_dropped) },
974 { "tx_dropped", MV643XX_ETH_STAT(stats.tx_dropped) },
975 { "good_octets_received", MV643XX_ETH_STAT(mib_counters.good_octets_received) },
976 { "bad_octets_received", MV643XX_ETH_STAT(mib_counters.bad_octets_received) },
977 { "internal_mac_transmit_err", MV643XX_ETH_STAT(mib_counters.internal_mac_transmit_err) },
978 { "good_frames_received", MV643XX_ETH_STAT(mib_counters.good_frames_received) },
979 { "bad_frames_received", MV643XX_ETH_STAT(mib_counters.bad_frames_received) },
980 { "broadcast_frames_received", MV643XX_ETH_STAT(mib_counters.broadcast_frames_received) },
981 { "multicast_frames_received", MV643XX_ETH_STAT(mib_counters.multicast_frames_received) },
982 { "frames_64_octets", MV643XX_ETH_STAT(mib_counters.frames_64_octets) },
983 { "frames_65_to_127_octets", MV643XX_ETH_STAT(mib_counters.frames_65_to_127_octets) },
984 { "frames_128_to_255_octets", MV643XX_ETH_STAT(mib_counters.frames_128_to_255_octets) },
985 { "frames_256_to_511_octets", MV643XX_ETH_STAT(mib_counters.frames_256_to_511_octets) },
986 { "frames_512_to_1023_octets", MV643XX_ETH_STAT(mib_counters.frames_512_to_1023_octets) },
987 { "frames_1024_to_max_octets", MV643XX_ETH_STAT(mib_counters.frames_1024_to_max_octets) },
988 { "good_octets_sent", MV643XX_ETH_STAT(mib_counters.good_octets_sent) },
989 { "good_frames_sent", MV643XX_ETH_STAT(mib_counters.good_frames_sent) },
990 { "excessive_collision", MV643XX_ETH_STAT(mib_counters.excessive_collision) },
991 { "multicast_frames_sent", MV643XX_ETH_STAT(mib_counters.multicast_frames_sent) },
992 { "broadcast_frames_sent", MV643XX_ETH_STAT(mib_counters.broadcast_frames_sent) },
993 { "unrec_mac_control_received", MV643XX_ETH_STAT(mib_counters.unrec_mac_control_received) },
994 { "fc_sent", MV643XX_ETH_STAT(mib_counters.fc_sent) },
995 { "good_fc_received", MV643XX_ETH_STAT(mib_counters.good_fc_received) },
996 { "bad_fc_received", MV643XX_ETH_STAT(mib_counters.bad_fc_received) },
997 { "undersize_received", MV643XX_ETH_STAT(mib_counters.undersize_received) },
998 { "fragments_received", MV643XX_ETH_STAT(mib_counters.fragments_received) },
999 { "oversize_received", MV643XX_ETH_STAT(mib_counters.oversize_received) },
1000 { "jabber_received", MV643XX_ETH_STAT(mib_counters.jabber_received) },
1001 { "mac_receive_error", MV643XX_ETH_STAT(mib_counters.mac_receive_error) },
1002 { "bad_crc_event", MV643XX_ETH_STAT(mib_counters.bad_crc_event) },
1003 { "collision", MV643XX_ETH_STAT(mib_counters.collision) },
1004 { "late_collision", MV643XX_ETH_STAT(mib_counters.late_collision) },
1007 #define MV643XX_ETH_STATS_LEN ARRAY_SIZE(mv643xx_eth_gstrings_stats)
1009 static int mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1011 struct mv643xx_eth_private *mp = netdev_priv(dev);
1014 spin_lock_irq(&mp->lock);
1015 err = mii_ethtool_gset(&mp->mii, cmd);
1016 spin_unlock_irq(&mp->lock);
1018 /* The PHY may support 1000baseT_Half, but the mv643xx does not */
1019 cmd->supported &= ~SUPPORTED_1000baseT_Half;
1020 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
1025 static int mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1027 struct mv643xx_eth_private *mp = netdev_priv(dev);
1030 spin_lock_irq(&mp->lock);
1031 err = mii_ethtool_sset(&mp->mii, cmd);
1032 spin_unlock_irq(&mp->lock);
1037 static void mv643xx_eth_get_drvinfo(struct net_device *netdev,
1038 struct ethtool_drvinfo *drvinfo)
1040 strncpy(drvinfo->driver, mv643xx_eth_driver_name, 32);
1041 strncpy(drvinfo->version, mv643xx_eth_driver_version, 32);
1042 strncpy(drvinfo->fw_version, "N/A", 32);
1043 strncpy(drvinfo->bus_info, "mv643xx", 32);
1044 drvinfo->n_stats = MV643XX_ETH_STATS_LEN;
1047 static int mv643xx_eth_nway_restart(struct net_device *dev)
1049 struct mv643xx_eth_private *mp = netdev_priv(dev);
1051 return mii_nway_restart(&mp->mii);
1054 static u32 mv643xx_eth_get_link(struct net_device *dev)
1056 struct mv643xx_eth_private *mp = netdev_priv(dev);
1058 return mii_link_ok(&mp->mii);
1061 static void mv643xx_eth_get_strings(struct net_device *netdev, uint32_t stringset,
1068 for (i=0; i < MV643XX_ETH_STATS_LEN; i++) {
1069 memcpy(data + i * ETH_GSTRING_LEN,
1070 mv643xx_eth_gstrings_stats[i].stat_string,
1077 static void mv643xx_eth_get_ethtool_stats(struct net_device *netdev,
1078 struct ethtool_stats *stats, uint64_t *data)
1080 struct mv643xx_eth_private *mp = netdev->priv;
1083 update_mib_counters(mp);
1085 for (i = 0; i < MV643XX_ETH_STATS_LEN; i++) {
1086 char *p = (char *)mp+mv643xx_eth_gstrings_stats[i].stat_offset;
1087 data[i] = (mv643xx_eth_gstrings_stats[i].sizeof_stat ==
1088 sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p;
1092 static int mv643xx_eth_get_sset_count(struct net_device *netdev, int sset)
1096 return MV643XX_ETH_STATS_LEN;
1102 static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
1103 .get_settings = mv643xx_eth_get_settings,
1104 .set_settings = mv643xx_eth_set_settings,
1105 .get_drvinfo = mv643xx_eth_get_drvinfo,
1106 .get_link = mv643xx_eth_get_link,
1107 .set_sg = ethtool_op_set_sg,
1108 .get_sset_count = mv643xx_eth_get_sset_count,
1109 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats,
1110 .get_strings = mv643xx_eth_get_strings,
1111 .nway_reset = mv643xx_eth_nway_restart,
1115 /* address handling *********************************************************/
1116 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *p_addr)
1118 unsigned int port_num = mp->port_num;
1122 mac_h = rdl(mp, MAC_ADDR_HIGH(port_num));
1123 mac_l = rdl(mp, MAC_ADDR_LOW(port_num));
1125 p_addr[0] = (mac_h >> 24) & 0xff;
1126 p_addr[1] = (mac_h >> 16) & 0xff;
1127 p_addr[2] = (mac_h >> 8) & 0xff;
1128 p_addr[3] = mac_h & 0xff;
1129 p_addr[4] = (mac_l >> 8) & 0xff;
1130 p_addr[5] = mac_l & 0xff;
1133 static void init_mac_tables(struct mv643xx_eth_private *mp)
1135 unsigned int port_num = mp->port_num;
1138 /* Clear DA filter unicast table (Ex_dFUT) */
1139 for (table_index = 0; table_index <= 0xC; table_index += 4)
1140 wrl(mp, UNICAST_TABLE(port_num) + table_index, 0);
1142 for (table_index = 0; table_index <= 0xFC; table_index += 4) {
1143 /* Clear DA filter special multicast table (Ex_dFSMT) */
1144 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + table_index, 0);
1145 /* Clear DA filter other multicast table (Ex_dFOMT) */
1146 wrl(mp, OTHER_MCAST_TABLE(port_num) + table_index, 0);
1150 static void set_filter_table_entry(struct mv643xx_eth_private *mp,
1151 int table, unsigned char entry)
1153 unsigned int table_reg;
1154 unsigned int tbl_offset;
1155 unsigned int reg_offset;
1157 tbl_offset = (entry / 4) * 4; /* Register offset of DA table entry */
1158 reg_offset = entry % 4; /* Entry offset within the register */
1160 /* Set "accepts frame bit" at specified table entry */
1161 table_reg = rdl(mp, table + tbl_offset);
1162 table_reg |= 0x01 << (8 * reg_offset);
1163 wrl(mp, table + tbl_offset, table_reg);
1166 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *p_addr)
1168 unsigned int port_num = mp->port_num;
1173 mac_l = (p_addr[4] << 8) | (p_addr[5]);
1174 mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) |
1177 wrl(mp, MAC_ADDR_LOW(port_num), mac_l);
1178 wrl(mp, MAC_ADDR_HIGH(port_num), mac_h);
1180 /* Accept frames with this address */
1181 table = UNICAST_TABLE(port_num);
1182 set_filter_table_entry(mp, table, p_addr[5] & 0x0f);
1185 static void mv643xx_eth_update_mac_address(struct net_device *dev)
1187 struct mv643xx_eth_private *mp = netdev_priv(dev);
1189 init_mac_tables(mp);
1190 uc_addr_set(mp, dev->dev_addr);
1193 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
1197 for (i = 0; i < 6; i++)
1198 /* +2 is for the offset of the HW addr type */
1199 dev->dev_addr[i] = ((unsigned char *)addr)[i + 2];
1200 mv643xx_eth_update_mac_address(dev);
1204 static void mc_addr(struct mv643xx_eth_private *mp, unsigned char *p_addr)
1206 unsigned int port_num = mp->port_num;
1209 unsigned char crc_result = 0;
1215 if ((p_addr[0] == 0x01) && (p_addr[1] == 0x00) &&
1216 (p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) {
1217 table = SPECIAL_MCAST_TABLE(port_num);
1218 set_filter_table_entry(mp, table, p_addr[5]);
1222 /* Calculate CRC-8 out of the given address */
1223 mac_h = (p_addr[0] << 8) | (p_addr[1]);
1224 mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) |
1225 (p_addr[4] << 8) | (p_addr[5] << 0);
1227 for (i = 0; i < 32; i++)
1228 mac_array[i] = (mac_l >> i) & 0x1;
1229 for (i = 32; i < 48; i++)
1230 mac_array[i] = (mac_h >> (i - 32)) & 0x1;
1232 crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^ mac_array[39] ^
1233 mac_array[35] ^ mac_array[34] ^ mac_array[31] ^ mac_array[30] ^
1234 mac_array[28] ^ mac_array[23] ^ mac_array[21] ^ mac_array[19] ^
1235 mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ mac_array[12] ^
1236 mac_array[8] ^ mac_array[7] ^ mac_array[6] ^ mac_array[0];
1238 crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^
1239 mac_array[41] ^ mac_array[39] ^ mac_array[36] ^ mac_array[34] ^
1240 mac_array[32] ^ mac_array[30] ^ mac_array[29] ^ mac_array[28] ^
1241 mac_array[24] ^ mac_array[23] ^ mac_array[22] ^ mac_array[21] ^
1242 mac_array[20] ^ mac_array[18] ^ mac_array[17] ^ mac_array[16] ^
1243 mac_array[15] ^ mac_array[14] ^ mac_array[13] ^ mac_array[12] ^
1244 mac_array[9] ^ mac_array[6] ^ mac_array[1] ^ mac_array[0];
1246 crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^ mac_array[43] ^
1247 mac_array[42] ^ mac_array[39] ^ mac_array[37] ^ mac_array[34] ^
1248 mac_array[33] ^ mac_array[29] ^ mac_array[28] ^ mac_array[25] ^
1249 mac_array[24] ^ mac_array[22] ^ mac_array[17] ^ mac_array[15] ^
1250 mac_array[13] ^ mac_array[12] ^ mac_array[10] ^ mac_array[8] ^
1251 mac_array[6] ^ mac_array[2] ^ mac_array[1] ^ mac_array[0];
1253 crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^
1254 mac_array[40] ^ mac_array[38] ^ mac_array[35] ^ mac_array[34] ^
1255 mac_array[30] ^ mac_array[29] ^ mac_array[26] ^ mac_array[25] ^
1256 mac_array[23] ^ mac_array[18] ^ mac_array[16] ^ mac_array[14] ^
1257 mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[7] ^
1258 mac_array[3] ^ mac_array[2] ^ mac_array[1];
1260 crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[41] ^
1261 mac_array[39] ^ mac_array[36] ^ mac_array[35] ^ mac_array[31] ^
1262 mac_array[30] ^ mac_array[27] ^ mac_array[26] ^ mac_array[24] ^
1263 mac_array[19] ^ mac_array[17] ^ mac_array[15] ^ mac_array[14] ^
1264 mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ mac_array[4] ^
1265 mac_array[3] ^ mac_array[2];
1267 crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^ mac_array[42] ^
1268 mac_array[40] ^ mac_array[37] ^ mac_array[36] ^ mac_array[32] ^
1269 mac_array[31] ^ mac_array[28] ^ mac_array[27] ^ mac_array[25] ^
1270 mac_array[20] ^ mac_array[18] ^ mac_array[16] ^ mac_array[15] ^
1271 mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[5] ^
1272 mac_array[4] ^ mac_array[3];
1274 crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^ mac_array[41] ^
1275 mac_array[38] ^ mac_array[37] ^ mac_array[33] ^ mac_array[32] ^
1276 mac_array[29] ^ mac_array[28] ^ mac_array[26] ^ mac_array[21] ^
1277 mac_array[19] ^ mac_array[17] ^ mac_array[16] ^ mac_array[14] ^
1278 mac_array[12] ^ mac_array[10] ^ mac_array[6] ^ mac_array[5] ^
1281 crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^ mac_array[39] ^
1282 mac_array[38] ^ mac_array[34] ^ mac_array[33] ^ mac_array[30] ^
1283 mac_array[29] ^ mac_array[27] ^ mac_array[22] ^ mac_array[20] ^
1284 mac_array[18] ^ mac_array[17] ^ mac_array[15] ^ mac_array[13] ^
1285 mac_array[11] ^ mac_array[7] ^ mac_array[6] ^ mac_array[5];
1287 for (i = 0; i < 8; i++)
1288 crc_result = crc_result | (crc[i] << i);
1290 table = OTHER_MCAST_TABLE(port_num);
1291 set_filter_table_entry(mp, table, crc_result);
1294 static void set_multicast_list(struct net_device *dev)
1297 struct dev_mc_list *mc_list;
1300 struct mv643xx_eth_private *mp = netdev_priv(dev);
1301 unsigned int port_num = mp->port_num;
1303 /* If the device is in promiscuous mode or in all multicast mode,
1304 * we will fully populate both multicast tables with accept.
1305 * This is guaranteed to yield a match on all multicast addresses...
1307 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) {
1308 for (table_index = 0; table_index <= 0xFC; table_index += 4) {
1309 /* Set all entries in DA filter special multicast
1311 * Set for ETH_Q0 for now
1313 * 0 Accept=1, Drop=0
1314 * 3-1 Queue ETH_Q0=0
1317 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + table_index, 0x01010101);
1319 /* Set all entries in DA filter other multicast
1321 * Set for ETH_Q0 for now
1323 * 0 Accept=1, Drop=0
1324 * 3-1 Queue ETH_Q0=0
1327 wrl(mp, OTHER_MCAST_TABLE(port_num) + table_index, 0x01010101);
1332 /* We will clear out multicast tables every time we get the list.
1333 * Then add the entire new list...
1335 for (table_index = 0; table_index <= 0xFC; table_index += 4) {
1336 /* Clear DA filter special multicast table (Ex_dFSMT) */
1337 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + table_index, 0);
1339 /* Clear DA filter other multicast table (Ex_dFOMT) */
1340 wrl(mp, OTHER_MCAST_TABLE(port_num) + table_index, 0);
1343 /* Get pointer to net_device multicast list and add each one... */
1344 for (i = 0, mc_list = dev->mc_list;
1345 (i < 256) && (mc_list != NULL) && (i < dev->mc_count);
1346 i++, mc_list = mc_list->next)
1347 if (mc_list->dmi_addrlen == 6)
1348 mc_addr(mp, mc_list->dmi_addr);
1351 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
1353 struct mv643xx_eth_private *mp = netdev_priv(dev);
1356 config_reg = rdl(mp, PORT_CONFIG(mp->port_num));
1357 if (dev->flags & IFF_PROMISC)
1358 config_reg |= UNICAST_PROMISCUOUS_MODE;
1360 config_reg &= ~UNICAST_PROMISCUOUS_MODE;
1361 wrl(mp, PORT_CONFIG(mp->port_num), config_reg);
1363 set_multicast_list(dev);
1367 /* rx/tx queue initialisation ***********************************************/
1368 static void ether_init_rx_desc_ring(struct mv643xx_eth_private *mp)
1370 volatile struct rx_desc *p_rx_desc;
1371 int rx_desc_num = mp->rx_ring_size;
1374 /* initialize the next_desc_ptr links in the Rx descriptors ring */
1375 p_rx_desc = (struct rx_desc *)mp->p_rx_desc_area;
1376 for (i = 0; i < rx_desc_num; i++) {
1377 p_rx_desc[i].next_desc_ptr = mp->rx_desc_dma +
1378 ((i + 1) % rx_desc_num) * sizeof(struct rx_desc);
1381 /* Save Rx desc pointer to driver struct. */
1382 mp->rx_curr_desc_q = 0;
1383 mp->rx_used_desc_q = 0;
1385 mp->rx_desc_area_size = rx_desc_num * sizeof(struct rx_desc);
1388 static void mv643xx_eth_free_rx_rings(struct net_device *dev)
1390 struct mv643xx_eth_private *mp = netdev_priv(dev);
1393 /* Stop RX Queues */
1394 mv643xx_eth_port_disable_rx(mp);
1396 /* Free preallocated skb's on RX rings */
1397 for (curr = 0; mp->rx_desc_count && curr < mp->rx_ring_size; curr++) {
1398 if (mp->rx_skb[curr]) {
1399 dev_kfree_skb(mp->rx_skb[curr]);
1400 mp->rx_desc_count--;
1404 if (mp->rx_desc_count)
1406 "%s: Error in freeing Rx Ring. %d skb's still"
1407 " stuck in RX Ring - ignoring them\n", dev->name,
1410 if (mp->rx_sram_size)
1411 iounmap(mp->p_rx_desc_area);
1413 dma_free_coherent(NULL, mp->rx_desc_area_size,
1414 mp->p_rx_desc_area, mp->rx_desc_dma);
1417 static void ether_init_tx_desc_ring(struct mv643xx_eth_private *mp)
1419 int tx_desc_num = mp->tx_ring_size;
1420 struct tx_desc *p_tx_desc;
1423 /* Initialize the next_desc_ptr links in the Tx descriptors ring */
1424 p_tx_desc = (struct tx_desc *)mp->p_tx_desc_area;
1425 for (i = 0; i < tx_desc_num; i++) {
1426 p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma +
1427 ((i + 1) % tx_desc_num) * sizeof(struct tx_desc);
1430 mp->tx_curr_desc_q = 0;
1431 mp->tx_used_desc_q = 0;
1433 mp->tx_desc_area_size = tx_desc_num * sizeof(struct tx_desc);
1436 static int mv643xx_eth_free_tx_descs(struct net_device *dev, int force)
1438 struct mv643xx_eth_private *mp = netdev_priv(dev);
1439 struct tx_desc *desc;
1441 struct sk_buff *skb;
1442 unsigned long flags;
1448 while (mp->tx_desc_count > 0) {
1449 spin_lock_irqsave(&mp->lock, flags);
1451 /* tx_desc_count might have changed before acquiring the lock */
1452 if (mp->tx_desc_count <= 0) {
1453 spin_unlock_irqrestore(&mp->lock, flags);
1457 tx_index = mp->tx_used_desc_q;
1458 desc = &mp->p_tx_desc_area[tx_index];
1459 cmd_sts = desc->cmd_sts;
1461 if (!force && (cmd_sts & BUFFER_OWNED_BY_DMA)) {
1462 spin_unlock_irqrestore(&mp->lock, flags);
1466 mp->tx_used_desc_q = (tx_index + 1) % mp->tx_ring_size;
1467 mp->tx_desc_count--;
1469 addr = desc->buf_ptr;
1470 count = desc->byte_cnt;
1471 skb = mp->tx_skb[tx_index];
1473 mp->tx_skb[tx_index] = NULL;
1475 if (cmd_sts & ERROR_SUMMARY) {
1476 printk("%s: Error in TX\n", dev->name);
1477 dev->stats.tx_errors++;
1480 spin_unlock_irqrestore(&mp->lock, flags);
1482 if (cmd_sts & TX_FIRST_DESC)
1483 dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE);
1485 dma_unmap_page(NULL, addr, count, DMA_TO_DEVICE);
1488 dev_kfree_skb_irq(skb);
1496 static void mv643xx_eth_free_completed_tx_descs(struct net_device *dev)
1498 struct mv643xx_eth_private *mp = netdev_priv(dev);
1500 if (mv643xx_eth_free_tx_descs(dev, 0) &&
1501 mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB)
1502 netif_wake_queue(dev);
1505 static void mv643xx_eth_free_all_tx_descs(struct net_device *dev)
1507 mv643xx_eth_free_tx_descs(dev, 1);
1510 static void mv643xx_eth_free_tx_rings(struct net_device *dev)
1512 struct mv643xx_eth_private *mp = netdev_priv(dev);
1514 /* Stop Tx Queues */
1515 mv643xx_eth_port_disable_tx(mp);
1517 /* Free outstanding skb's on TX ring */
1518 mv643xx_eth_free_all_tx_descs(dev);
1520 BUG_ON(mp->tx_used_desc_q != mp->tx_curr_desc_q);
1523 if (mp->tx_sram_size)
1524 iounmap(mp->p_tx_desc_area);
1526 dma_free_coherent(NULL, mp->tx_desc_area_size,
1527 mp->p_tx_desc_area, mp->tx_desc_dma);
1531 /* netdev ops and related ***************************************************/
1532 static void port_reset(struct mv643xx_eth_private *mp);
1534 static void mv643xx_eth_update_pscr(struct net_device *dev,
1535 struct ethtool_cmd *ecmd)
1537 struct mv643xx_eth_private *mp = netdev_priv(dev);
1538 int port_num = mp->port_num;
1540 unsigned int queues;
1542 o_pscr = rdl(mp, PORT_SERIAL_CONTROL(port_num));
1545 /* clear speed, duplex and rx buffer size fields */
1546 n_pscr &= ~(SET_MII_SPEED_TO_100 |
1547 SET_GMII_SPEED_TO_1000 |
1548 SET_FULL_DUPLEX_MODE |
1549 MAX_RX_PACKET_MASK);
1551 if (ecmd->duplex == DUPLEX_FULL)
1552 n_pscr |= SET_FULL_DUPLEX_MODE;
1554 if (ecmd->speed == SPEED_1000)
1555 n_pscr |= SET_GMII_SPEED_TO_1000 |
1556 MAX_RX_PACKET_9700BYTE;
1558 if (ecmd->speed == SPEED_100)
1559 n_pscr |= SET_MII_SPEED_TO_100;
1560 n_pscr |= MAX_RX_PACKET_1522BYTE;
1563 if (n_pscr != o_pscr) {
1564 if ((o_pscr & SERIAL_PORT_ENABLE) == 0)
1565 wrl(mp, PORT_SERIAL_CONTROL(port_num), n_pscr);
1567 queues = mv643xx_eth_port_disable_tx(mp);
1569 o_pscr &= ~SERIAL_PORT_ENABLE;
1570 wrl(mp, PORT_SERIAL_CONTROL(port_num), o_pscr);
1571 wrl(mp, PORT_SERIAL_CONTROL(port_num), n_pscr);
1572 wrl(mp, PORT_SERIAL_CONTROL(port_num), n_pscr);
1574 mv643xx_eth_port_enable_tx(mp, queues);
1579 static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id)
1581 struct net_device *dev = (struct net_device *)dev_id;
1582 struct mv643xx_eth_private *mp = netdev_priv(dev);
1583 u32 int_cause, int_cause_ext = 0;
1584 unsigned int port_num = mp->port_num;
1586 /* Read interrupt cause registers */
1587 int_cause = rdl(mp, INT_CAUSE(port_num)) & (INT_RX | INT_EXT);
1588 if (int_cause & INT_EXT) {
1589 int_cause_ext = rdl(mp, INT_CAUSE_EXT(port_num))
1590 & (INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX);
1591 wrl(mp, INT_CAUSE_EXT(port_num), ~int_cause_ext);
1594 /* PHY status changed */
1595 if (int_cause_ext & (INT_EXT_LINK | INT_EXT_PHY)) {
1596 struct ethtool_cmd cmd;
1598 if (mii_link_ok(&mp->mii)) {
1599 mii_ethtool_gset(&mp->mii, &cmd);
1600 mv643xx_eth_update_pscr(dev, &cmd);
1601 mv643xx_eth_port_enable_tx(mp, 1);
1602 if (!netif_carrier_ok(dev)) {
1603 netif_carrier_on(dev);
1604 if (mp->tx_ring_size - mp->tx_desc_count >=
1606 netif_wake_queue(dev);
1608 } else if (netif_carrier_ok(dev)) {
1609 netif_stop_queue(dev);
1610 netif_carrier_off(dev);
1614 #ifdef MV643XX_ETH_NAPI
1615 if (int_cause & INT_RX) {
1616 /* schedule the NAPI poll routine to maintain port */
1617 wrl(mp, INT_MASK(port_num), 0x00000000);
1619 /* wait for previous write to complete */
1620 rdl(mp, INT_MASK(port_num));
1622 netif_rx_schedule(dev, &mp->napi);
1625 if (int_cause & INT_RX)
1626 mv643xx_eth_receive_queue(dev, INT_MAX);
1628 if (int_cause_ext & INT_EXT_TX)
1629 mv643xx_eth_free_completed_tx_descs(dev);
1632 * If no real interrupt occured, exit.
1633 * This can happen when using gigE interrupt coalescing mechanism.
1635 if ((int_cause == 0x0) && (int_cause_ext == 0x0))
1641 static void phy_reset(struct mv643xx_eth_private *mp)
1643 unsigned int phy_reg_data;
1646 read_smi_reg(mp, 0, &phy_reg_data);
1647 phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */
1648 write_smi_reg(mp, 0, phy_reg_data);
1650 /* wait for PHY to come out of reset */
1653 read_smi_reg(mp, 0, &phy_reg_data);
1654 } while (phy_reg_data & 0x8000);
1657 static void port_start(struct net_device *dev)
1659 struct mv643xx_eth_private *mp = netdev_priv(dev);
1660 unsigned int port_num = mp->port_num;
1661 int tx_curr_desc, rx_curr_desc;
1663 struct ethtool_cmd ethtool_cmd;
1665 /* Assignment of Tx CTRP of given queue */
1666 tx_curr_desc = mp->tx_curr_desc_q;
1667 wrl(mp, TXQ_CURRENT_DESC_PTR(port_num),
1668 (u32)((struct tx_desc *)mp->tx_desc_dma + tx_curr_desc));
1670 /* Assignment of Rx CRDP of given queue */
1671 rx_curr_desc = mp->rx_curr_desc_q;
1672 wrl(mp, RXQ_CURRENT_DESC_PTR(port_num),
1673 (u32)((struct rx_desc *)mp->rx_desc_dma + rx_curr_desc));
1675 /* Add the assigned Ethernet address to the port's address table */
1676 uc_addr_set(mp, dev->dev_addr);
1679 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast
1680 * frames to RX queue #0.
1682 wrl(mp, PORT_CONFIG(port_num), 0x00000000);
1685 * Treat BPDUs as normal multicasts, and disable partition mode.
1687 wrl(mp, PORT_CONFIG_EXT(port_num), 0x00000000);
1689 pscr = rdl(mp, PORT_SERIAL_CONTROL(port_num));
1691 pscr &= ~(SERIAL_PORT_ENABLE | FORCE_LINK_PASS);
1692 wrl(mp, PORT_SERIAL_CONTROL(port_num), pscr);
1694 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL |
1695 DISABLE_AUTO_NEG_SPEED_GMII |
1696 DISABLE_AUTO_NEG_FOR_DUPLEX |
1697 DO_NOT_FORCE_LINK_FAIL |
1698 SERIAL_PORT_CONTROL_RESERVED;
1700 wrl(mp, PORT_SERIAL_CONTROL(port_num), pscr);
1702 pscr |= SERIAL_PORT_ENABLE;
1703 wrl(mp, PORT_SERIAL_CONTROL(port_num), pscr);
1705 /* Assign port SDMA configuration */
1706 wrl(mp, SDMA_CONFIG(port_num), PORT_SDMA_CONFIG_DEFAULT_VALUE);
1708 /* Enable port Rx. */
1709 mv643xx_eth_port_enable_rx(mp, 1);
1711 /* Disable port bandwidth limits by clearing MTU register */
1712 wrl(mp, TX_BW_MTU(port_num), 0);
1714 /* save phy settings across reset */
1715 mv643xx_eth_get_settings(dev, ðtool_cmd);
1717 mv643xx_eth_set_settings(dev, ðtool_cmd);
1720 #ifdef MV643XX_ETH_COAL
1721 static unsigned int set_rx_coal(struct mv643xx_eth_private *mp,
1724 unsigned int port_num = mp->port_num;
1725 unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64;
1727 /* Set RX Coalescing mechanism */
1728 wrl(mp, SDMA_CONFIG(port_num),
1729 ((coal & 0x3fff) << 8) |
1730 (rdl(mp, SDMA_CONFIG(port_num))
1737 static unsigned int set_tx_coal(struct mv643xx_eth_private *mp,
1740 unsigned int coal = ((mp->shared->t_clk / 1000000) * delay) / 64;
1742 /* Set TX Coalescing mechanism */
1743 wrl(mp, TX_FIFO_URGENT_THRESHOLD(mp->port_num), coal << 4);
1748 static void port_init(struct mv643xx_eth_private *mp)
1752 init_mac_tables(mp);
1755 static int mv643xx_eth_open(struct net_device *dev)
1757 struct mv643xx_eth_private *mp = netdev_priv(dev);
1758 unsigned int port_num = mp->port_num;
1762 /* Clear any pending ethernet port interrupts */
1763 wrl(mp, INT_CAUSE(port_num), 0);
1764 wrl(mp, INT_CAUSE_EXT(port_num), 0);
1765 /* wait for previous write to complete */
1766 rdl(mp, INT_CAUSE_EXT(port_num));
1768 err = request_irq(dev->irq, mv643xx_eth_int_handler,
1769 IRQF_SHARED | IRQF_SAMPLE_RANDOM, dev->name, dev);
1771 printk(KERN_ERR "%s: Can not assign IRQ\n", dev->name);
1777 memset(&mp->timeout, 0, sizeof(struct timer_list));
1778 mp->timeout.function = mv643xx_eth_rx_refill_descs_timer_wrapper;
1779 mp->timeout.data = (unsigned long)dev;
1781 /* Allocate RX and TX skb rings */
1782 mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size,
1785 printk(KERN_ERR "%s: Cannot allocate Rx skb ring\n", dev->name);
1789 mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size,
1792 printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name);
1794 goto out_free_rx_skb;
1797 /* Allocate TX ring */
1798 mp->tx_desc_count = 0;
1799 size = mp->tx_ring_size * sizeof(struct tx_desc);
1800 mp->tx_desc_area_size = size;
1802 if (mp->tx_sram_size) {
1803 mp->p_tx_desc_area = ioremap(mp->tx_sram_addr,
1805 mp->tx_desc_dma = mp->tx_sram_addr;
1807 mp->p_tx_desc_area = dma_alloc_coherent(NULL, size,
1811 if (!mp->p_tx_desc_area) {
1812 printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n",
1815 goto out_free_tx_skb;
1817 BUG_ON((u32) mp->p_tx_desc_area & 0xf); /* check 16-byte alignment */
1818 memset((void *)mp->p_tx_desc_area, 0, mp->tx_desc_area_size);
1820 ether_init_tx_desc_ring(mp);
1822 /* Allocate RX ring */
1823 mp->rx_desc_count = 0;
1824 size = mp->rx_ring_size * sizeof(struct rx_desc);
1825 mp->rx_desc_area_size = size;
1827 if (mp->rx_sram_size) {
1828 mp->p_rx_desc_area = ioremap(mp->rx_sram_addr,
1830 mp->rx_desc_dma = mp->rx_sram_addr;
1832 mp->p_rx_desc_area = dma_alloc_coherent(NULL, size,
1836 if (!mp->p_rx_desc_area) {
1837 printk(KERN_ERR "%s: Cannot allocate Rx ring (size %d bytes)\n",
1839 printk(KERN_ERR "%s: Freeing previously allocated TX queues...",
1841 if (mp->rx_sram_size)
1842 iounmap(mp->p_tx_desc_area);
1844 dma_free_coherent(NULL, mp->tx_desc_area_size,
1845 mp->p_tx_desc_area, mp->tx_desc_dma);
1847 goto out_free_tx_skb;
1849 memset((void *)mp->p_rx_desc_area, 0, size);
1851 ether_init_rx_desc_ring(mp);
1853 mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
1855 #ifdef MV643XX_ETH_NAPI
1856 napi_enable(&mp->napi);
1861 /* Interrupt Coalescing */
1863 #ifdef MV643XX_ETH_COAL
1864 mp->rx_int_coal = set_rx_coal(mp, MV643XX_ETH_RX_COAL);
1867 mp->tx_int_coal = set_tx_coal(mp, MV643XX_ETH_TX_COAL);
1869 /* Unmask phy and link status changes interrupts */
1870 wrl(mp, INT_MASK_EXT(port_num), INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX);
1872 /* Unmask RX buffer and TX end interrupt */
1873 wrl(mp, INT_MASK(port_num), INT_RX | INT_EXT);
1882 free_irq(dev->irq, dev);
1887 static void port_reset(struct mv643xx_eth_private *mp)
1889 unsigned int port_num = mp->port_num;
1890 unsigned int reg_data;
1892 mv643xx_eth_port_disable_tx(mp);
1893 mv643xx_eth_port_disable_rx(mp);
1895 /* Clear all MIB counters */
1896 clear_mib_counters(mp);
1898 /* Reset the Enable bit in the Configuration Register */
1899 reg_data = rdl(mp, PORT_SERIAL_CONTROL(port_num));
1900 reg_data &= ~(SERIAL_PORT_ENABLE |
1901 DO_NOT_FORCE_LINK_FAIL |
1903 wrl(mp, PORT_SERIAL_CONTROL(port_num), reg_data);
1906 static int mv643xx_eth_stop(struct net_device *dev)
1908 struct mv643xx_eth_private *mp = netdev_priv(dev);
1909 unsigned int port_num = mp->port_num;
1911 /* Mask all interrupts on ethernet port */
1912 wrl(mp, INT_MASK(port_num), 0x00000000);
1913 /* wait for previous write to complete */
1914 rdl(mp, INT_MASK(port_num));
1916 #ifdef MV643XX_ETH_NAPI
1917 napi_disable(&mp->napi);
1919 netif_carrier_off(dev);
1920 netif_stop_queue(dev);
1924 mv643xx_eth_free_tx_rings(dev);
1925 mv643xx_eth_free_rx_rings(dev);
1927 free_irq(dev->irq, dev);
1932 static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1934 struct mv643xx_eth_private *mp = netdev_priv(dev);
1936 return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL);
1939 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
1941 if ((new_mtu > 9500) || (new_mtu < 64))
1945 if (!netif_running(dev))
1949 * Stop and then re-open the interface. This will allocate RX
1950 * skbs of the new MTU.
1951 * There is a possible danger that the open will not succeed,
1952 * due to memory being full, which might fail the open function.
1954 mv643xx_eth_stop(dev);
1955 if (mv643xx_eth_open(dev)) {
1956 printk(KERN_ERR "%s: Fatal error on opening device\n",
1963 static void mv643xx_eth_tx_timeout_task(struct work_struct *ugly)
1965 struct mv643xx_eth_private *mp = container_of(ugly, struct mv643xx_eth_private,
1967 struct net_device *dev = mp->dev;
1969 if (!netif_running(dev))
1972 netif_stop_queue(dev);
1977 if (mp->tx_ring_size - mp->tx_desc_count >= MAX_DESCS_PER_SKB)
1978 netif_wake_queue(dev);
1981 static void mv643xx_eth_tx_timeout(struct net_device *dev)
1983 struct mv643xx_eth_private *mp = netdev_priv(dev);
1985 printk(KERN_INFO "%s: TX timeout ", dev->name);
1987 /* Do the reset outside of interrupt context */
1988 schedule_work(&mp->tx_timeout_task);
1991 #ifdef CONFIG_NET_POLL_CONTROLLER
1992 static void mv643xx_eth_netpoll(struct net_device *netdev)
1994 struct mv643xx_eth_private *mp = netdev_priv(netdev);
1995 int port_num = mp->port_num;
1997 wrl(mp, INT_MASK(port_num), 0x00000000);
1998 /* wait for previous write to complete */
1999 rdl(mp, INT_MASK(port_num));
2001 mv643xx_eth_int_handler(netdev->irq, netdev);
2003 wrl(mp, INT_MASK(port_num), INT_RX | INT_CAUSE_EXT);
2007 static int mv643xx_eth_mdio_read(struct net_device *dev, int phy_id, int location)
2009 struct mv643xx_eth_private *mp = netdev_priv(dev);
2012 read_smi_reg(mp, location, &val);
2016 static void mv643xx_eth_mdio_write(struct net_device *dev, int phy_id, int location, int val)
2018 struct mv643xx_eth_private *mp = netdev_priv(dev);
2019 write_smi_reg(mp, location, val);
2023 /* platform glue ************************************************************/
2025 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp,
2026 struct mbus_dram_target_info *dram)
2028 void __iomem *base = msp->base;
2033 for (i = 0; i < 6; i++) {
2034 writel(0, base + WINDOW_BASE(i));
2035 writel(0, base + WINDOW_SIZE(i));
2037 writel(0, base + WINDOW_REMAP_HIGH(i));
2043 for (i = 0; i < dram->num_cs; i++) {
2044 struct mbus_dram_window *cs = dram->cs + i;
2046 writel((cs->base & 0xffff0000) |
2047 (cs->mbus_attr << 8) |
2048 dram->mbus_dram_target_id, base + WINDOW_BASE(i));
2049 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i));
2051 win_enable &= ~(1 << i);
2052 win_protect |= 3 << (2 * i);
2055 writel(win_enable, base + WINDOW_BAR_ENABLE);
2056 msp->win_protect = win_protect;
2059 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
2061 static int mv643xx_eth_version_printed = 0;
2062 struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
2063 struct mv643xx_eth_shared_private *msp;
2064 struct resource *res;
2067 if (!mv643xx_eth_version_printed++)
2068 printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n");
2071 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2076 msp = kmalloc(sizeof(*msp), GFP_KERNEL);
2079 memset(msp, 0, sizeof(*msp));
2081 msp->base = ioremap(res->start, res->end - res->start + 1);
2082 if (msp->base == NULL)
2085 spin_lock_init(&msp->phy_lock);
2086 msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
2088 platform_set_drvdata(pdev, msp);
2091 * (Re-)program MBUS remapping windows if we are asked to.
2093 if (pd != NULL && pd->dram != NULL)
2094 mv643xx_eth_conf_mbus_windows(msp, pd->dram);
2104 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
2106 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
2114 static struct platform_driver mv643xx_eth_shared_driver = {
2115 .probe = mv643xx_eth_shared_probe,
2116 .remove = mv643xx_eth_shared_remove,
2118 .name = MV643XX_ETH_SHARED_NAME,
2119 .owner = THIS_MODULE,
2123 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr)
2126 int addr_shift = 5 * mp->port_num;
2128 reg_data = rdl(mp, PHY_ADDR);
2129 reg_data &= ~(0x1f << addr_shift);
2130 reg_data |= (phy_addr & 0x1f) << addr_shift;
2131 wrl(mp, PHY_ADDR, reg_data);
2134 static int phy_addr_get(struct mv643xx_eth_private *mp)
2136 unsigned int reg_data;
2138 reg_data = rdl(mp, PHY_ADDR);
2140 return ((reg_data >> (5 * mp->port_num)) & 0x1f);
2143 static int phy_detect(struct mv643xx_eth_private *mp)
2145 unsigned int phy_reg_data0;
2148 read_smi_reg(mp, 0, &phy_reg_data0);
2149 auto_neg = phy_reg_data0 & 0x1000;
2150 phy_reg_data0 ^= 0x1000; /* invert auto_neg */
2151 write_smi_reg(mp, 0, phy_reg_data0);
2153 read_smi_reg(mp, 0, &phy_reg_data0);
2154 if ((phy_reg_data0 & 0x1000) == auto_neg)
2155 return -ENODEV; /* change didn't take */
2157 phy_reg_data0 ^= 0x1000;
2158 write_smi_reg(mp, 0, phy_reg_data0);
2162 static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address,
2163 int speed, int duplex,
2164 struct ethtool_cmd *cmd)
2166 struct mv643xx_eth_private *mp = netdev_priv(dev);
2168 memset(cmd, 0, sizeof(*cmd));
2170 cmd->port = PORT_MII;
2171 cmd->transceiver = XCVR_INTERNAL;
2172 cmd->phy_address = phy_address;
2175 cmd->autoneg = AUTONEG_ENABLE;
2176 /* mii lib checks, but doesn't use speed on AUTONEG_ENABLE */
2177 cmd->speed = SPEED_100;
2178 cmd->advertising = ADVERTISED_10baseT_Half |
2179 ADVERTISED_10baseT_Full |
2180 ADVERTISED_100baseT_Half |
2181 ADVERTISED_100baseT_Full;
2182 if (mp->mii.supports_gmii)
2183 cmd->advertising |= ADVERTISED_1000baseT_Full;
2185 cmd->autoneg = AUTONEG_DISABLE;
2187 cmd->duplex = duplex;
2191 static int mv643xx_eth_probe(struct platform_device *pdev)
2193 struct mv643xx_eth_platform_data *pd;
2195 struct mv643xx_eth_private *mp;
2196 struct net_device *dev;
2198 struct resource *res;
2200 struct ethtool_cmd cmd;
2201 int duplex = DUPLEX_HALF;
2202 int speed = 0; /* default to auto-negotiation */
2203 DECLARE_MAC_BUF(mac);
2205 pd = pdev->dev.platform_data;
2207 printk(KERN_ERR "No mv643xx_eth_platform_data\n");
2211 if (pd->shared == NULL) {
2212 printk(KERN_ERR "No mv643xx_eth_platform_data->shared\n");
2216 dev = alloc_etherdev(sizeof(struct mv643xx_eth_private));
2220 platform_set_drvdata(pdev, dev);
2222 mp = netdev_priv(dev);
2224 #ifdef MV643XX_ETH_NAPI
2225 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, 64);
2228 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2230 dev->irq = res->start;
2232 dev->open = mv643xx_eth_open;
2233 dev->stop = mv643xx_eth_stop;
2234 dev->hard_start_xmit = mv643xx_eth_start_xmit;
2235 dev->set_mac_address = mv643xx_eth_set_mac_address;
2236 dev->set_multicast_list = mv643xx_eth_set_rx_mode;
2238 /* No need to Tx Timeout */
2239 dev->tx_timeout = mv643xx_eth_tx_timeout;
2241 #ifdef CONFIG_NET_POLL_CONTROLLER
2242 dev->poll_controller = mv643xx_eth_netpoll;
2245 dev->watchdog_timeo = 2 * HZ;
2247 dev->change_mtu = mv643xx_eth_change_mtu;
2248 dev->do_ioctl = mv643xx_eth_do_ioctl;
2249 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
2251 #ifdef MV643XX_ETH_CHECKSUM_OFFLOAD_TX
2252 #ifdef MAX_SKB_FRAGS
2254 * Zero copy can only work if we use Discovery II memory. Else, we will
2255 * have to map the buffers to ISA memory which is only 16 MB
2257 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
2261 /* Configure the timeout task */
2262 INIT_WORK(&mp->tx_timeout_task, mv643xx_eth_tx_timeout_task);
2264 spin_lock_init(&mp->lock);
2266 mp->shared = platform_get_drvdata(pd->shared);
2267 port_num = mp->port_num = pd->port_number;
2269 if (mp->shared->win_protect)
2270 wrl(mp, WINDOW_PROTECT(port_num), mp->shared->win_protect);
2272 mp->shared_smi = mp->shared;
2273 if (pd->shared_smi != NULL)
2274 mp->shared_smi = platform_get_drvdata(pd->shared_smi);
2276 /* set default config values */
2277 uc_addr_get(mp, dev->dev_addr);
2278 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE;
2279 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE;
2281 if (is_valid_ether_addr(pd->mac_addr))
2282 memcpy(dev->dev_addr, pd->mac_addr, 6);
2284 if (pd->phy_addr || pd->force_phy_addr)
2285 phy_addr_set(mp, pd->phy_addr);
2287 if (pd->rx_queue_size)
2288 mp->rx_ring_size = pd->rx_queue_size;
2290 if (pd->tx_queue_size)
2291 mp->tx_ring_size = pd->tx_queue_size;
2293 if (pd->tx_sram_size) {
2294 mp->tx_sram_size = pd->tx_sram_size;
2295 mp->tx_sram_addr = pd->tx_sram_addr;
2298 if (pd->rx_sram_size) {
2299 mp->rx_sram_size = pd->rx_sram_size;
2300 mp->rx_sram_addr = pd->rx_sram_addr;
2303 duplex = pd->duplex;
2306 /* Hook up MII support for ethtool */
2308 mp->mii.mdio_read = mv643xx_eth_mdio_read;
2309 mp->mii.mdio_write = mv643xx_eth_mdio_write;
2310 mp->mii.phy_id = phy_addr_get(mp);
2311 mp->mii.phy_id_mask = 0x3f;
2312 mp->mii.reg_num_mask = 0x1f;
2314 err = phy_detect(mp);
2316 pr_debug("%s: No PHY detected at addr %d\n",
2317 dev->name, phy_addr_get(mp));
2322 mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii);
2323 mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd);
2324 mv643xx_eth_update_pscr(dev, &cmd);
2325 mv643xx_eth_set_settings(dev, &cmd);
2327 SET_NETDEV_DEV(dev, &pdev->dev);
2328 err = register_netdev(dev);
2334 "%s: port %d with MAC address %s\n",
2335 dev->name, port_num, print_mac(mac, p));
2337 if (dev->features & NETIF_F_SG)
2338 printk(KERN_NOTICE "%s: Scatter Gather Enabled\n", dev->name);
2340 if (dev->features & NETIF_F_IP_CSUM)
2341 printk(KERN_NOTICE "%s: TX TCP/IP Checksumming Supported\n",
2344 #ifdef MV643XX_ETH_CHECKSUM_OFFLOAD_TX
2345 printk(KERN_NOTICE "%s: RX TCP/UDP Checksum Offload ON \n", dev->name);
2348 #ifdef MV643XX_ETH_COAL
2349 printk(KERN_NOTICE "%s: TX and RX Interrupt Coalescing ON \n",
2353 #ifdef MV643XX_ETH_NAPI
2354 printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name);
2357 if (mp->tx_sram_size > 0)
2358 printk(KERN_NOTICE "%s: Using SRAM\n", dev->name);
2368 static int mv643xx_eth_remove(struct platform_device *pdev)
2370 struct net_device *dev = platform_get_drvdata(pdev);
2372 unregister_netdev(dev);
2373 flush_scheduled_work();
2376 platform_set_drvdata(pdev, NULL);
2380 static void mv643xx_eth_shutdown(struct platform_device *pdev)
2382 struct net_device *dev = platform_get_drvdata(pdev);
2383 struct mv643xx_eth_private *mp = netdev_priv(dev);
2384 unsigned int port_num = mp->port_num;
2386 /* Mask all interrupts on ethernet port */
2387 wrl(mp, INT_MASK(port_num), 0);
2388 rdl(mp, INT_MASK(port_num));
2393 static struct platform_driver mv643xx_eth_driver = {
2394 .probe = mv643xx_eth_probe,
2395 .remove = mv643xx_eth_remove,
2396 .shutdown = mv643xx_eth_shutdown,
2398 .name = MV643XX_ETH_NAME,
2399 .owner = THIS_MODULE,
2403 static int __init mv643xx_eth_init_module(void)
2407 rc = platform_driver_register(&mv643xx_eth_shared_driver);
2409 rc = platform_driver_register(&mv643xx_eth_driver);
2411 platform_driver_unregister(&mv643xx_eth_shared_driver);
2416 static void __exit mv643xx_eth_cleanup_module(void)
2418 platform_driver_unregister(&mv643xx_eth_driver);
2419 platform_driver_unregister(&mv643xx_eth_shared_driver);
2422 module_init(mv643xx_eth_init_module);
2423 module_exit(mv643xx_eth_cleanup_module);
2425 MODULE_LICENSE("GPL");
2426 MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani"
2427 " and Dale Farnsworth");
2428 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
2429 MODULE_ALIAS("platform:" MV643XX_ETH_NAME);
2430 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME);