2 * drivers/net/mv643xx_eth.c - Driver for MV643XX ethernet ports
3 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com>
5 * Based on the 64360 driver from:
6 * Copyright (C) 2002 rabeeh@galileo.co.il
8 * Copyright (C) 2003 PMC-Sierra, Inc.,
9 * written by Manish Lachwani
11 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
13 * Copyright (C) 2004-2005 MontaVista Software, Inc.
14 * Dale Farnsworth <dale@farnsworth.org>
16 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com>
17 * <sjhill@realitydiluted.com>
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License
21 * as published by the Free Software Foundation; either version 2
22 * of the License, or (at your option) any later version.
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 #include <linux/init.h>
34 #include <linux/dma-mapping.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/etherdevice.h>
43 #include <linux/bitops.h>
44 #include <linux/delay.h>
45 #include <linux/ethtool.h>
46 #include <linux/platform_device.h>
49 #include <asm/types.h>
50 #include <asm/pgtable.h>
51 #include <asm/system.h>
52 #include <asm/delay.h>
53 #include "mv643xx_eth.h"
56 * The first part is the high level driver of the gigE ethernet ports.
62 #define DMA_ALIGN 8 /* hw requires 8-byte alignment */
63 #define HW_IP_ALIGN 2 /* hw aligns IP header */
64 #define WRAP HW_IP_ALIGN + ETH_HLEN + VLAN_HLEN + FCS_LEN
65 #define RX_SKB_SIZE ((dev->mtu + WRAP + 7) & ~0x7)
67 #define INT_UNMASK_ALL 0x0007ffff
68 #define INT_UNMASK_ALL_EXT 0x0011ffff
69 #define INT_MASK_ALL 0x00000000
70 #define INT_MASK_ALL_EXT 0x00000000
71 #define INT_CAUSE_CHECK_BITS INT_CAUSE_UNMASK_ALL
72 #define INT_CAUSE_CHECK_BITS_EXT INT_CAUSE_UNMASK_ALL_EXT
74 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
75 #define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1)
77 #define MAX_DESCS_PER_SKB 1
80 #define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */
81 #define PHY_WAIT_MICRO_SECONDS 10
83 /* Static function declarations */
84 static void eth_port_uc_addr_get(struct net_device *dev,
85 unsigned char *MacAddr);
86 static void eth_port_set_multicast_list(struct net_device *);
87 static void mv643xx_eth_port_enable_tx(unsigned int port_num,
88 unsigned int channels);
89 static void mv643xx_eth_port_enable_rx(unsigned int port_num,
90 unsigned int channels);
91 static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num);
92 static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num);
93 static int mv643xx_eth_open(struct net_device *);
94 static int mv643xx_eth_stop(struct net_device *);
95 static int mv643xx_eth_change_mtu(struct net_device *, int);
96 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *);
97 static void eth_port_init_mac_tables(unsigned int eth_port_num);
99 static int mv643xx_poll(struct net_device *dev, int *budget);
101 static int ethernet_phy_get(unsigned int eth_port_num);
102 static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr);
103 static int ethernet_phy_detect(unsigned int eth_port_num);
104 static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location);
105 static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val);
106 static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
107 static struct ethtool_ops mv643xx_ethtool_ops;
109 static char mv643xx_driver_name[] = "mv643xx_eth";
110 static char mv643xx_driver_version[] = "1.0";
112 static void __iomem *mv643xx_eth_shared_base;
114 /* used to protect MV643XX_ETH_SMI_REG, which is shared across ports */
115 static DEFINE_SPINLOCK(mv643xx_eth_phy_lock);
117 static inline u32 mv_read(int offset)
119 void __iomem *reg_base;
121 reg_base = mv643xx_eth_shared_base - MV643XX_ETH_SHARED_REGS;
123 return readl(reg_base + offset);
126 static inline void mv_write(int offset, u32 data)
128 void __iomem *reg_base;
130 reg_base = mv643xx_eth_shared_base - MV643XX_ETH_SHARED_REGS;
131 writel(data, reg_base + offset);
135 * Changes MTU (maximum transfer unit) of the gigabit ethenret port
137 * Input : pointer to ethernet interface network device structure
139 * Output : 0 upon success, -EINVAL upon failure
141 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
143 if ((new_mtu > 9500) || (new_mtu < 64))
148 * Stop then re-open the interface. This will allocate RX skb's with
150 * There is a possible danger that the open will not successed, due
151 * to memory is full, which might fail the open function.
153 if (netif_running(dev)) {
154 mv643xx_eth_stop(dev);
155 if (mv643xx_eth_open(dev))
157 "%s: Fatal error on opening device\n",
165 * mv643xx_eth_rx_task
167 * Fills / refills RX queue on a certain gigabit ethernet port
169 * Input : pointer to ethernet interface network device structure
172 static void mv643xx_eth_rx_task(void *data)
174 struct net_device *dev = (struct net_device *)data;
175 struct mv643xx_private *mp = netdev_priv(dev);
176 struct pkt_info pkt_info;
180 if (test_and_set_bit(0, &mp->rx_task_busy))
181 panic("%s: Error in test_set_bit / clear_bit", dev->name);
183 while (mp->rx_desc_count < (mp->rx_ring_size - 5)) {
184 skb = dev_alloc_skb(RX_SKB_SIZE + DMA_ALIGN);
188 unaligned = (u32)skb->data & (DMA_ALIGN - 1);
190 skb_reserve(skb, DMA_ALIGN - unaligned);
191 pkt_info.cmd_sts = ETH_RX_ENABLE_INTERRUPT;
192 pkt_info.byte_cnt = RX_SKB_SIZE;
193 pkt_info.buf_ptr = dma_map_single(NULL, skb->data, RX_SKB_SIZE,
195 pkt_info.return_info = skb;
196 if (eth_rx_return_buff(mp, &pkt_info) != ETH_OK) {
198 "%s: Error allocating RX Ring\n", dev->name);
201 skb_reserve(skb, HW_IP_ALIGN);
203 clear_bit(0, &mp->rx_task_busy);
205 * If RX ring is empty of SKB, set a timer to try allocating
206 * again in a later time .
208 if ((mp->rx_desc_count == 0) && (mp->rx_timer_flag == 0)) {
209 printk(KERN_INFO "%s: Rx ring is empty\n", dev->name);
211 mp->timeout.expires = jiffies + (HZ / 10);
212 add_timer(&mp->timeout);
213 mp->rx_timer_flag = 1;
215 #ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
217 /* Return interrupts */
218 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(mp->port_num),
225 * mv643xx_eth_rx_task_timer_wrapper
227 * Timer routine to wake up RX queue filling task. This function is
228 * used only in case the RX queue is empty, and all alloc_skb has
229 * failed (due to out of memory event).
231 * Input : pointer to ethernet interface network device structure
234 static void mv643xx_eth_rx_task_timer_wrapper(unsigned long data)
236 struct net_device *dev = (struct net_device *)data;
237 struct mv643xx_private *mp = netdev_priv(dev);
239 mp->rx_timer_flag = 0;
240 mv643xx_eth_rx_task((void *)data);
244 * mv643xx_eth_update_mac_address
246 * Update the MAC address of the port in the address table
248 * Input : pointer to ethernet interface network device structure
251 static void mv643xx_eth_update_mac_address(struct net_device *dev)
253 struct mv643xx_private *mp = netdev_priv(dev);
254 unsigned int port_num = mp->port_num;
256 eth_port_init_mac_tables(port_num);
257 eth_port_uc_addr_set(port_num, dev->dev_addr);
261 * mv643xx_eth_set_rx_mode
263 * Change from promiscuos to regular rx mode
265 * Input : pointer to ethernet interface network device structure
268 static void mv643xx_eth_set_rx_mode(struct net_device *dev)
270 struct mv643xx_private *mp = netdev_priv(dev);
273 config_reg = mv_read(MV643XX_ETH_PORT_CONFIG_REG(mp->port_num));
274 if (dev->flags & IFF_PROMISC)
275 config_reg |= (u32) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE;
277 config_reg &= ~(u32) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE;
278 mv_write(MV643XX_ETH_PORT_CONFIG_REG(mp->port_num), config_reg);
280 eth_port_set_multicast_list(dev);
284 * mv643xx_eth_set_mac_address
286 * Change the interface's mac address.
287 * No special hardware thing should be done because interface is always
288 * put in promiscuous mode.
290 * Input : pointer to ethernet interface network device structure and
291 * a pointer to the designated entry to be added to the cache.
292 * Output : zero upon success, negative upon failure
294 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr)
298 for (i = 0; i < 6; i++)
299 /* +2 is for the offset of the HW addr type */
300 dev->dev_addr[i] = ((unsigned char *)addr)[i + 2];
301 mv643xx_eth_update_mac_address(dev);
306 * mv643xx_eth_tx_timeout
308 * Called upon a timeout on transmitting a packet
310 * Input : pointer to ethernet interface network device structure.
313 static void mv643xx_eth_tx_timeout(struct net_device *dev)
315 struct mv643xx_private *mp = netdev_priv(dev);
317 printk(KERN_INFO "%s: TX timeout ", dev->name);
319 /* Do the reset outside of interrupt context */
320 schedule_work(&mp->tx_timeout_task);
324 * mv643xx_eth_tx_timeout_task
326 * Actual routine to reset the adapter when a timeout on Tx has occurred
328 static void mv643xx_eth_tx_timeout_task(struct net_device *dev)
330 struct mv643xx_private *mp = netdev_priv(dev);
332 netif_device_detach(dev);
333 eth_port_reset(mp->port_num);
335 netif_device_attach(dev);
339 * mv643xx_eth_free_tx_queue
341 * Input : dev - a pointer to the required interface
343 * Output : 0 if was able to release skb , nonzero otherwise
345 static int mv643xx_eth_free_tx_queue(struct net_device *dev,
346 unsigned int eth_int_cause_ext)
348 struct mv643xx_private *mp = netdev_priv(dev);
349 struct net_device_stats *stats = &mp->stats;
350 struct pkt_info pkt_info;
353 if (!(eth_int_cause_ext & (BIT0 | BIT8)))
356 /* Check only queue 0 */
357 while (eth_tx_return_desc(mp, &pkt_info) == ETH_OK) {
358 if (pkt_info.cmd_sts & BIT0) {
359 printk("%s: Error in TX\n", dev->name);
363 if (pkt_info.cmd_sts & ETH_TX_FIRST_DESC)
364 dma_unmap_single(NULL, pkt_info.buf_ptr,
368 dma_unmap_page(NULL, pkt_info.buf_ptr,
372 if (pkt_info.return_info) {
373 dev_kfree_skb_irq(pkt_info.return_info);
382 * mv643xx_eth_receive
384 * This function is forward packets that are received from the port's
385 * queues toward kernel core or FastRoute them to another interface.
387 * Input : dev - a pointer to the required interface
388 * max - maximum number to receive (0 means unlimted)
390 * Output : number of served packets
393 static int mv643xx_eth_receive_queue(struct net_device *dev, int budget)
395 static int mv643xx_eth_receive_queue(struct net_device *dev)
398 struct mv643xx_private *mp = netdev_priv(dev);
399 struct net_device_stats *stats = &mp->stats;
400 unsigned int received_packets = 0;
402 struct pkt_info pkt_info;
405 while (budget-- > 0 && eth_port_receive(mp, &pkt_info) == ETH_OK) {
407 while (eth_port_receive(mp, &pkt_info) == ETH_OK) {
412 /* Update statistics. Note byte count includes 4 byte CRC count */
414 stats->rx_bytes += pkt_info.byte_cnt;
415 skb = pkt_info.return_info;
417 * In case received a packet without first / last bits on OR
418 * the error summary bit is on, the packets needs to be dropeed.
420 if (((pkt_info.cmd_sts
421 & (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) !=
422 (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC))
423 || (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)) {
425 if ((pkt_info.cmd_sts & (ETH_RX_FIRST_DESC |
426 ETH_RX_LAST_DESC)) !=
427 (ETH_RX_FIRST_DESC | ETH_RX_LAST_DESC)) {
430 "%s: Received packet spread "
431 "on multiple descriptors\n",
434 if (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)
437 dev_kfree_skb_irq(skb);
440 * The -4 is for the CRC in the trailer of the
443 skb_put(skb, pkt_info.byte_cnt - 4);
446 if (pkt_info.cmd_sts & ETH_LAYER_4_CHECKSUM_OK) {
447 skb->ip_summed = CHECKSUM_UNNECESSARY;
449 (pkt_info.cmd_sts & 0x0007fff8) >> 3);
451 skb->protocol = eth_type_trans(skb, dev);
453 netif_receive_skb(skb);
458 dev->last_rx = jiffies;
461 return received_packets;
464 /* Set the mv643xx port configuration register for the speed/duplex mode. */
465 static void mv643xx_eth_update_pscr(struct net_device *dev,
466 struct ethtool_cmd *ecmd)
468 struct mv643xx_private *mp = netdev_priv(dev);
469 int port_num = mp->port_num;
471 unsigned int channels;
473 o_pscr = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num));
476 /* clear speed, duplex and rx buffer size fields */
477 n_pscr &= ~(MV643XX_ETH_SET_MII_SPEED_TO_100 |
478 MV643XX_ETH_SET_GMII_SPEED_TO_1000 |
479 MV643XX_ETH_SET_FULL_DUPLEX_MODE |
480 MV643XX_ETH_MAX_RX_PACKET_MASK);
482 if (ecmd->duplex == DUPLEX_FULL)
483 n_pscr |= MV643XX_ETH_SET_FULL_DUPLEX_MODE;
485 if (ecmd->speed == SPEED_1000)
486 n_pscr |= MV643XX_ETH_SET_GMII_SPEED_TO_1000 |
487 MV643XX_ETH_MAX_RX_PACKET_9700BYTE;
489 if (ecmd->speed == SPEED_100)
490 n_pscr |= MV643XX_ETH_SET_MII_SPEED_TO_100;
491 n_pscr |= MV643XX_ETH_MAX_RX_PACKET_1522BYTE;
494 if (n_pscr != o_pscr) {
495 if ((o_pscr & MV643XX_ETH_SERIAL_PORT_ENABLE) == 0)
496 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
499 channels = mv643xx_eth_port_disable_tx(port_num);
501 o_pscr &= ~MV643XX_ETH_SERIAL_PORT_ENABLE;
502 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
504 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
506 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num),
509 mv643xx_eth_port_enable_tx(port_num, channels);
515 * mv643xx_eth_int_handler
517 * Main interrupt handler for the gigbit ethernet ports
519 * Input : irq - irq number (not used)
520 * dev_id - a pointer to the required interface's data structure
525 static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id,
526 struct pt_regs *regs)
528 struct net_device *dev = (struct net_device *)dev_id;
529 struct mv643xx_private *mp = netdev_priv(dev);
530 u32 eth_int_cause, eth_int_cause_ext = 0;
531 unsigned int port_num = mp->port_num;
533 /* Read interrupt cause registers */
534 eth_int_cause = mv_read(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num)) &
537 if (eth_int_cause & BIT1)
538 eth_int_cause_ext = mv_read(
539 MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num)) &
543 if (!(eth_int_cause & 0x0007fffd)) {
544 /* Dont ack the Rx interrupt */
547 * Clear specific ethernet port intrerrupt registers by
548 * acknowleding relevant bits.
550 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num),
552 if (eth_int_cause_ext != 0x0)
553 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG
554 (port_num), ~eth_int_cause_ext);
556 /* UDP change : We may need this */
557 if ((eth_int_cause_ext & 0x0000ffff) &&
558 (mv643xx_eth_free_tx_queue(dev, eth_int_cause_ext) == 0) &&
559 (mp->tx_ring_size > mp->tx_desc_count + MAX_DESCS_PER_SKB))
560 netif_wake_queue(dev);
563 if (netif_rx_schedule_prep(dev)) {
564 /* Mask all the interrupts */
565 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
567 /* wait for previous write to complete */
568 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
569 __netif_rx_schedule(dev);
572 if (eth_int_cause & (BIT2 | BIT11))
573 mv643xx_eth_receive_queue(dev, 0);
576 * After forwarded received packets to upper layer, add a task
577 * in an interrupts enabled context that refills the RX ring
580 #ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
581 /* Mask all interrupts on ethernet port */
582 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
584 /* wait for previous write to take effect */
585 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
587 queue_task(&mp->rx_task, &tq_immediate);
588 mark_bh(IMMEDIATE_BH);
590 mp->rx_task.func(dev);
594 /* PHY status changed */
595 if (eth_int_cause_ext & (BIT16 | BIT20)) {
596 struct ethtool_cmd cmd;
598 if (mii_link_ok(&mp->mii)) {
599 mii_ethtool_gset(&mp->mii, &cmd);
600 mv643xx_eth_update_pscr(dev, &cmd);
601 if (!netif_carrier_ok(dev)) {
602 netif_carrier_on(dev);
603 if (mp->tx_ring_size > mp->tx_desc_count +
605 netif_wake_queue(dev);
607 mv643xx_eth_port_enable_tx(port_num, mp->port_tx_queue_command);
610 } else if (netif_carrier_ok(dev)) {
611 netif_stop_queue(dev);
612 netif_carrier_off(dev);
617 * If no real interrupt occured, exit.
618 * This can happen when using gigE interrupt coalescing mechanism.
620 if ((eth_int_cause == 0x0) && (eth_int_cause_ext == 0x0))
629 * eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path
632 * This routine sets the RX coalescing interrupt mechanism parameter.
633 * This parameter is a timeout counter, that counts in 64 t_clk
634 * chunks ; that when timeout event occurs a maskable interrupt
636 * The parameter is calculated using the tClk of the MV-643xx chip
637 * , and the required delay of the interrupt in usec.
640 * unsigned int eth_port_num Ethernet port number
641 * unsigned int t_clk t_clk of the MV-643xx chip in HZ units
642 * unsigned int delay Delay in usec
645 * Interrupt coalescing mechanism value is set in MV-643xx chip.
648 * The interrupt coalescing value set in the gigE port.
651 static unsigned int eth_port_set_rx_coal(unsigned int eth_port_num,
652 unsigned int t_clk, unsigned int delay)
654 unsigned int coal = ((t_clk / 1000000) * delay) / 64;
656 /* Set RX Coalescing mechanism */
657 mv_write(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num),
658 ((coal & 0x3fff) << 8) |
659 (mv_read(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num))
667 * eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path
670 * This routine sets the TX coalescing interrupt mechanism parameter.
671 * This parameter is a timeout counter, that counts in 64 t_clk
672 * chunks ; that when timeout event occurs a maskable interrupt
674 * The parameter is calculated using the t_cLK frequency of the
675 * MV-643xx chip and the required delay in the interrupt in uSec
678 * unsigned int eth_port_num Ethernet port number
679 * unsigned int t_clk t_clk of the MV-643xx chip in HZ units
680 * unsigned int delay Delay in uSeconds
683 * Interrupt coalescing mechanism value is set in MV-643xx chip.
686 * The interrupt coalescing value set in the gigE port.
689 static unsigned int eth_port_set_tx_coal(unsigned int eth_port_num,
690 unsigned int t_clk, unsigned int delay)
693 coal = ((t_clk / 1000000) * delay) / 64;
694 /* Set TX Coalescing mechanism */
695 mv_write(MV643XX_ETH_TX_FIFO_URGENT_THRESHOLD_REG(eth_port_num),
701 * ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
704 * This function prepares a Rx chained list of descriptors and packet
705 * buffers in a form of a ring. The routine must be called after port
706 * initialization routine and before port start routine.
707 * The Ethernet SDMA engine uses CPU bus addresses to access the various
708 * devices in the system (i.e. DRAM). This function uses the ethernet
709 * struct 'virtual to physical' routine (set by the user) to set the ring
710 * with physical addresses.
713 * struct mv643xx_private *mp Ethernet Port Control srtuct.
716 * The routine updates the Ethernet port control struct with information
717 * regarding the Rx descriptors and buffers.
722 static void ether_init_rx_desc_ring(struct mv643xx_private *mp)
724 volatile struct eth_rx_desc *p_rx_desc;
725 int rx_desc_num = mp->rx_ring_size;
728 /* initialize the next_desc_ptr links in the Rx descriptors ring */
729 p_rx_desc = (struct eth_rx_desc *)mp->p_rx_desc_area;
730 for (i = 0; i < rx_desc_num; i++) {
731 p_rx_desc[i].next_desc_ptr = mp->rx_desc_dma +
732 ((i + 1) % rx_desc_num) * sizeof(struct eth_rx_desc);
735 /* Save Rx desc pointer to driver struct. */
736 mp->rx_curr_desc_q = 0;
737 mp->rx_used_desc_q = 0;
739 mp->rx_desc_area_size = rx_desc_num * sizeof(struct eth_rx_desc);
741 /* Enable queue 0 for this port */
742 mp->port_rx_queue_command = 1;
746 * ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory.
749 * This function prepares a Tx chained list of descriptors and packet
750 * buffers in a form of a ring. The routine must be called after port
751 * initialization routine and before port start routine.
752 * The Ethernet SDMA engine uses CPU bus addresses to access the various
753 * devices in the system (i.e. DRAM). This function uses the ethernet
754 * struct 'virtual to physical' routine (set by the user) to set the ring
755 * with physical addresses.
758 * struct mv643xx_private *mp Ethernet Port Control srtuct.
761 * The routine updates the Ethernet port control struct with information
762 * regarding the Tx descriptors and buffers.
767 static void ether_init_tx_desc_ring(struct mv643xx_private *mp)
769 int tx_desc_num = mp->tx_ring_size;
770 struct eth_tx_desc *p_tx_desc;
773 /* Initialize the next_desc_ptr links in the Tx descriptors ring */
774 p_tx_desc = (struct eth_tx_desc *)mp->p_tx_desc_area;
775 for (i = 0; i < tx_desc_num; i++) {
776 p_tx_desc[i].next_desc_ptr = mp->tx_desc_dma +
777 ((i + 1) % tx_desc_num) * sizeof(struct eth_tx_desc);
780 mp->tx_curr_desc_q = 0;
781 mp->tx_used_desc_q = 0;
782 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
783 mp->tx_first_desc_q = 0;
786 mp->tx_desc_area_size = tx_desc_num * sizeof(struct eth_tx_desc);
788 /* Enable queue 0 for this port */
789 mp->port_tx_queue_command = 1;
792 static int mv643xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
794 struct mv643xx_private *mp = netdev_priv(dev);
797 spin_lock_irq(&mp->lock);
798 err = mii_ethtool_sset(&mp->mii, cmd);
799 spin_unlock_irq(&mp->lock);
804 static int mv643xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
806 struct mv643xx_private *mp = netdev_priv(dev);
809 spin_lock_irq(&mp->lock);
810 err = mii_ethtool_gset(&mp->mii, cmd);
811 spin_unlock_irq(&mp->lock);
813 /* The PHY may support 1000baseT_Half, but the mv643xx does not */
814 cmd->supported &= ~SUPPORTED_1000baseT_Half;
815 cmd->advertising &= ~ADVERTISED_1000baseT_Half;
823 * This function is called when openning the network device. The function
824 * should initialize all the hardware, initialize cyclic Rx/Tx
825 * descriptors chain and buffers and allocate an IRQ to the network
828 * Input : a pointer to the network device structure
830 * Output : zero of success , nonzero if fails.
833 static int mv643xx_eth_open(struct net_device *dev)
835 struct mv643xx_private *mp = netdev_priv(dev);
836 unsigned int port_num = mp->port_num;
840 err = request_irq(dev->irq, mv643xx_eth_int_handler,
841 SA_SHIRQ | SA_SAMPLE_RANDOM, dev->name, dev);
843 printk(KERN_ERR "Can not assign IRQ number to MV643XX_eth%d\n",
850 INIT_WORK(&mp->rx_task, (void (*)(void *))mv643xx_eth_rx_task, dev);
852 memset(&mp->timeout, 0, sizeof(struct timer_list));
853 mp->timeout.function = mv643xx_eth_rx_task_timer_wrapper;
854 mp->timeout.data = (unsigned long)dev;
856 mp->rx_task_busy = 0;
857 mp->rx_timer_flag = 0;
859 /* Allocate RX and TX skb rings */
860 mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size,
863 printk(KERN_ERR "%s: Cannot allocate Rx skb ring\n", dev->name);
867 mp->tx_skb = kmalloc(sizeof(*mp->tx_skb) * mp->tx_ring_size,
870 printk(KERN_ERR "%s: Cannot allocate Tx skb ring\n", dev->name);
872 goto out_free_rx_skb;
875 /* Allocate TX ring */
876 mp->tx_desc_count = 0;
877 size = mp->tx_ring_size * sizeof(struct eth_tx_desc);
878 mp->tx_desc_area_size = size;
880 if (mp->tx_sram_size) {
881 mp->p_tx_desc_area = ioremap(mp->tx_sram_addr,
883 mp->tx_desc_dma = mp->tx_sram_addr;
885 mp->p_tx_desc_area = dma_alloc_coherent(NULL, size,
889 if (!mp->p_tx_desc_area) {
890 printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n",
893 goto out_free_tx_skb;
895 BUG_ON((u32) mp->p_tx_desc_area & 0xf); /* check 16-byte alignment */
896 memset((void *)mp->p_tx_desc_area, 0, mp->tx_desc_area_size);
898 ether_init_tx_desc_ring(mp);
900 /* Allocate RX ring */
901 mp->rx_desc_count = 0;
902 size = mp->rx_ring_size * sizeof(struct eth_rx_desc);
903 mp->rx_desc_area_size = size;
905 if (mp->rx_sram_size) {
906 mp->p_rx_desc_area = ioremap(mp->rx_sram_addr,
908 mp->rx_desc_dma = mp->rx_sram_addr;
910 mp->p_rx_desc_area = dma_alloc_coherent(NULL, size,
914 if (!mp->p_rx_desc_area) {
915 printk(KERN_ERR "%s: Cannot allocate Rx ring (size %d bytes)\n",
917 printk(KERN_ERR "%s: Freeing previously allocated TX queues...",
919 if (mp->rx_sram_size)
920 iounmap(mp->p_tx_desc_area);
922 dma_free_coherent(NULL, mp->tx_desc_area_size,
923 mp->p_tx_desc_area, mp->tx_desc_dma);
925 goto out_free_tx_skb;
927 memset((void *)mp->p_rx_desc_area, 0, size);
929 ether_init_rx_desc_ring(mp);
931 mv643xx_eth_rx_task(dev); /* Fill RX ring with skb's */
933 /* Clear any pending ethernet port interrupts */
934 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0);
935 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0);
939 /* Interrupt Coalescing */
943 eth_port_set_rx_coal(port_num, 133000000, MV643XX_RX_COAL);
947 eth_port_set_tx_coal(port_num, 133000000, MV643XX_TX_COAL);
949 /* Unmask phy and link status changes interrupts */
950 mv_write(MV643XX_ETH_INTERRUPT_EXTEND_MASK_REG(port_num),
953 /* Unmask RX buffer and TX end interrupt */
954 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_UNMASK_ALL);
963 free_irq(dev->irq, dev);
968 static void mv643xx_eth_free_tx_rings(struct net_device *dev)
970 struct mv643xx_private *mp = netdev_priv(dev);
971 unsigned int port_num = mp->port_num;
976 mv643xx_eth_port_disable_tx(port_num);
978 /* Free outstanding skb's on TX rings */
979 for (curr = 0; mp->tx_desc_count && curr < mp->tx_ring_size; curr++) {
980 skb = mp->tx_skb[curr];
982 mp->tx_desc_count -= skb_shinfo(skb)->nr_frags;
987 if (mp->tx_desc_count)
988 printk("%s: Error on Tx descriptor free - could not free %d"
989 " descriptors\n", dev->name, mp->tx_desc_count);
992 if (mp->tx_sram_size)
993 iounmap(mp->p_tx_desc_area);
995 dma_free_coherent(NULL, mp->tx_desc_area_size,
996 mp->p_tx_desc_area, mp->tx_desc_dma);
999 static void mv643xx_eth_free_rx_rings(struct net_device *dev)
1001 struct mv643xx_private *mp = netdev_priv(dev);
1002 unsigned int port_num = mp->port_num;
1005 /* Stop RX Queues */
1006 mv643xx_eth_port_disable_rx(port_num);
1008 /* Free preallocated skb's on RX rings */
1009 for (curr = 0; mp->rx_desc_count && curr < mp->rx_ring_size; curr++) {
1010 if (mp->rx_skb[curr]) {
1011 dev_kfree_skb(mp->rx_skb[curr]);
1012 mp->rx_desc_count--;
1016 if (mp->rx_desc_count)
1018 "%s: Error in freeing Rx Ring. %d skb's still"
1019 " stuck in RX Ring - ignoring them\n", dev->name,
1022 if (mp->rx_sram_size)
1023 iounmap(mp->p_rx_desc_area);
1025 dma_free_coherent(NULL, mp->rx_desc_area_size,
1026 mp->p_rx_desc_area, mp->rx_desc_dma);
1032 * This function is used when closing the network device.
1033 * It updates the hardware,
1034 * release all memory that holds buffers and descriptors and release the IRQ.
1035 * Input : a pointer to the device structure
1036 * Output : zero if success , nonzero if fails
1039 static int mv643xx_eth_stop(struct net_device *dev)
1041 struct mv643xx_private *mp = netdev_priv(dev);
1042 unsigned int port_num = mp->port_num;
1044 /* Mask all interrupts on ethernet port */
1045 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_MASK_ALL);
1046 /* wait for previous write to complete */
1047 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
1050 netif_poll_disable(dev);
1052 netif_carrier_off(dev);
1053 netif_stop_queue(dev);
1055 eth_port_reset(mp->port_num);
1057 mv643xx_eth_free_tx_rings(dev);
1058 mv643xx_eth_free_rx_rings(dev);
1061 netif_poll_enable(dev);
1064 free_irq(dev->irq, dev);
1070 static void mv643xx_tx(struct net_device *dev)
1072 struct mv643xx_private *mp = netdev_priv(dev);
1073 struct pkt_info pkt_info;
1075 while (eth_tx_return_desc(mp, &pkt_info) == ETH_OK) {
1076 if (pkt_info.cmd_sts & ETH_TX_FIRST_DESC)
1077 dma_unmap_single(NULL, pkt_info.buf_ptr,
1081 dma_unmap_page(NULL, pkt_info.buf_ptr,
1085 if (pkt_info.return_info)
1086 dev_kfree_skb_irq(pkt_info.return_info);
1089 if (netif_queue_stopped(dev) &&
1091 mp->tx_desc_count + MAX_DESCS_PER_SKB)
1092 netif_wake_queue(dev);
1098 * This function is used in case of NAPI
1100 static int mv643xx_poll(struct net_device *dev, int *budget)
1102 struct mv643xx_private *mp = netdev_priv(dev);
1103 int done = 1, orig_budget, work_done;
1104 unsigned int port_num = mp->port_num;
1106 #ifdef MV643XX_TX_FAST_REFILL
1107 if (++mp->tx_clean_threshold > 5) {
1109 mp->tx_clean_threshold = 0;
1113 if ((mv_read(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num)))
1114 != (u32) mp->rx_used_desc_q) {
1115 orig_budget = *budget;
1116 if (orig_budget > dev->quota)
1117 orig_budget = dev->quota;
1118 work_done = mv643xx_eth_receive_queue(dev, orig_budget);
1119 mp->rx_task.func(dev);
1120 *budget -= work_done;
1121 dev->quota -= work_done;
1122 if (work_done >= orig_budget)
1127 netif_rx_complete(dev);
1128 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0);
1129 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num), 0);
1130 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
1134 return done ? 0 : 1;
1138 /* Hardware can't handle unaligned fragments smaller than 9 bytes.
1139 * This helper function detects that case.
1142 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb)
1147 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
1148 fragp = &skb_shinfo(skb)->frags[frag];
1149 if (fragp->size <= 8 && fragp->page_offset & 0x7)
1157 * mv643xx_eth_start_xmit
1159 * This function is queues a packet in the Tx descriptor for
1162 * Input : skb - a pointer to socket buffer
1163 * dev - a pointer to the required port
1165 * Output : zero upon success
1167 static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
1169 struct mv643xx_private *mp = netdev_priv(dev);
1170 struct net_device_stats *stats = &mp->stats;
1171 ETH_FUNC_RET_STATUS status;
1172 unsigned long flags;
1173 struct pkt_info pkt_info;
1175 if (netif_queue_stopped(dev)) {
1177 "%s: Tried sending packet when interface is stopped\n",
1182 /* This is a hard error, log it. */
1183 if ((mp->tx_ring_size - mp->tx_desc_count) <=
1184 (skb_shinfo(skb)->nr_frags + 1)) {
1185 netif_stop_queue(dev);
1187 "%s: Bug in mv643xx_eth - Trying to transmit when"
1188 " queue full !\n", dev->name);
1192 /* Paranoid check - this shouldn't happen */
1194 stats->tx_dropped++;
1195 printk(KERN_ERR "mv64320_eth paranoid check failed\n");
1199 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
1200 if (has_tiny_unaligned_frags(skb)) {
1201 if ((skb_linearize(skb, GFP_ATOMIC) != 0)) {
1202 stats->tx_dropped++;
1203 printk(KERN_DEBUG "%s: failed to linearize tiny "
1204 "unaligned fragment\n", dev->name);
1209 spin_lock_irqsave(&mp->lock, flags);
1211 if (!skb_shinfo(skb)->nr_frags) {
1212 if (skb->ip_summed != CHECKSUM_HW) {
1213 /* Errata BTS #50, IHL must be 5 if no HW checksum */
1214 pkt_info.cmd_sts = ETH_TX_ENABLE_INTERRUPT |
1217 5 << ETH_TX_IHL_SHIFT;
1218 pkt_info.l4i_chk = 0;
1220 pkt_info.cmd_sts = ETH_TX_ENABLE_INTERRUPT |
1223 ETH_GEN_TCP_UDP_CHECKSUM |
1224 ETH_GEN_IP_V_4_CHECKSUM |
1225 skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
1226 /* CPU already calculated pseudo header checksum. */
1227 if ((skb->protocol == ETH_P_IP) &&
1228 (skb->nh.iph->protocol == IPPROTO_UDP) ) {
1229 pkt_info.cmd_sts |= ETH_UDP_FRAME;
1230 pkt_info.l4i_chk = skb->h.uh->check;
1231 } else if ((skb->protocol == ETH_P_IP) &&
1232 (skb->nh.iph->protocol == IPPROTO_TCP))
1233 pkt_info.l4i_chk = skb->h.th->check;
1236 "%s: chksum proto != IPv4 TCP or UDP\n",
1238 spin_unlock_irqrestore(&mp->lock, flags);
1242 pkt_info.byte_cnt = skb->len;
1243 pkt_info.buf_ptr = dma_map_single(NULL, skb->data, skb->len,
1245 pkt_info.return_info = skb;
1246 status = eth_port_send(mp, &pkt_info);
1247 if ((status == ETH_ERROR) || (status == ETH_QUEUE_FULL))
1248 printk(KERN_ERR "%s: Error on transmitting packet\n",
1250 stats->tx_bytes += pkt_info.byte_cnt;
1254 /* first frag which is skb header */
1255 pkt_info.byte_cnt = skb_headlen(skb);
1256 pkt_info.buf_ptr = dma_map_single(NULL, skb->data,
1259 pkt_info.l4i_chk = 0;
1260 pkt_info.return_info = 0;
1262 if (skb->ip_summed != CHECKSUM_HW)
1263 /* Errata BTS #50, IHL must be 5 if no HW checksum */
1264 pkt_info.cmd_sts = ETH_TX_FIRST_DESC |
1265 5 << ETH_TX_IHL_SHIFT;
1267 pkt_info.cmd_sts = ETH_TX_FIRST_DESC |
1268 ETH_GEN_TCP_UDP_CHECKSUM |
1269 ETH_GEN_IP_V_4_CHECKSUM |
1270 skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
1271 /* CPU already calculated pseudo header checksum. */
1272 if ((skb->protocol == ETH_P_IP) &&
1273 (skb->nh.iph->protocol == IPPROTO_UDP)) {
1274 pkt_info.cmd_sts |= ETH_UDP_FRAME;
1275 pkt_info.l4i_chk = skb->h.uh->check;
1276 } else if ((skb->protocol == ETH_P_IP) &&
1277 (skb->nh.iph->protocol == IPPROTO_TCP))
1278 pkt_info.l4i_chk = skb->h.th->check;
1281 "%s: chksum proto != IPv4 TCP or UDP\n",
1283 spin_unlock_irqrestore(&mp->lock, flags);
1288 status = eth_port_send(mp, &pkt_info);
1289 if (status != ETH_OK) {
1290 if ((status == ETH_ERROR))
1292 "%s: Error on transmitting packet\n",
1294 if (status == ETH_QUEUE_FULL)
1295 printk("Error on Queue Full \n");
1296 if (status == ETH_QUEUE_LAST_RESOURCE)
1297 printk("Tx resource error \n");
1299 stats->tx_bytes += pkt_info.byte_cnt;
1301 /* Check for the remaining frags */
1302 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
1303 skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
1304 pkt_info.l4i_chk = 0x0000;
1305 pkt_info.cmd_sts = 0x00000000;
1307 /* Last Frag enables interrupt and frees the skb */
1308 if (frag == (skb_shinfo(skb)->nr_frags - 1)) {
1309 pkt_info.cmd_sts |= ETH_TX_ENABLE_INTERRUPT |
1311 pkt_info.return_info = skb;
1313 pkt_info.return_info = 0;
1315 pkt_info.l4i_chk = 0;
1316 pkt_info.byte_cnt = this_frag->size;
1318 pkt_info.buf_ptr = dma_map_page(NULL, this_frag->page,
1319 this_frag->page_offset,
1323 status = eth_port_send(mp, &pkt_info);
1325 if (status != ETH_OK) {
1326 if ((status == ETH_ERROR))
1327 printk(KERN_ERR "%s: Error on "
1328 "transmitting packet\n",
1331 if (status == ETH_QUEUE_LAST_RESOURCE)
1332 printk("Tx resource error \n");
1334 if (status == ETH_QUEUE_FULL)
1335 printk("Queue is full \n");
1337 stats->tx_bytes += pkt_info.byte_cnt;
1341 spin_lock_irqsave(&mp->lock, flags);
1343 pkt_info.cmd_sts = ETH_TX_ENABLE_INTERRUPT | ETH_TX_FIRST_DESC |
1345 pkt_info.l4i_chk = 0;
1346 pkt_info.byte_cnt = skb->len;
1347 pkt_info.buf_ptr = dma_map_single(NULL, skb->data, skb->len,
1349 pkt_info.return_info = skb;
1350 status = eth_port_send(mp, &pkt_info);
1351 if ((status == ETH_ERROR) || (status == ETH_QUEUE_FULL))
1352 printk(KERN_ERR "%s: Error on transmitting packet\n",
1354 stats->tx_bytes += pkt_info.byte_cnt;
1357 /* Check if TX queue can handle another skb. If not, then
1358 * signal higher layers to stop requesting TX
1360 if (mp->tx_ring_size <= (mp->tx_desc_count + MAX_DESCS_PER_SKB))
1362 * Stop getting skb's from upper layers.
1363 * Getting skb's from upper layers will be enabled again after
1364 * packets are released.
1366 netif_stop_queue(dev);
1368 /* Update statistics and start of transmittion time */
1369 stats->tx_packets++;
1370 dev->trans_start = jiffies;
1372 spin_unlock_irqrestore(&mp->lock, flags);
1374 return 0; /* success */
1378 * mv643xx_eth_get_stats
1380 * Returns a pointer to the interface statistics.
1382 * Input : dev - a pointer to the required interface
1384 * Output : a pointer to the interface's statistics
1387 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev)
1389 struct mv643xx_private *mp = netdev_priv(dev);
1394 #ifdef CONFIG_NET_POLL_CONTROLLER
1395 static void mv643xx_netpoll(struct net_device *netdev)
1397 struct mv643xx_private *mp = netdev_priv(netdev);
1398 int port_num = mp->port_num;
1400 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_MASK_ALL);
1401 /* wait for previous write to complete */
1402 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
1404 mv643xx_eth_int_handler(netdev->irq, netdev, NULL);
1406 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num), INT_UNMASK_ALL);
1410 static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address,
1411 int speed, int duplex,
1412 struct ethtool_cmd *cmd)
1414 struct mv643xx_private *mp = netdev_priv(dev);
1416 memset(cmd, 0, sizeof(*cmd));
1418 cmd->port = PORT_MII;
1419 cmd->transceiver = XCVR_INTERNAL;
1420 cmd->phy_address = phy_address;
1423 cmd->autoneg = AUTONEG_ENABLE;
1424 /* mii lib checks, but doesn't use speed on AUTONEG_ENABLE */
1425 cmd->speed = SPEED_100;
1426 cmd->advertising = ADVERTISED_10baseT_Half |
1427 ADVERTISED_10baseT_Full |
1428 ADVERTISED_100baseT_Half |
1429 ADVERTISED_100baseT_Full;
1430 if (mp->mii.supports_gmii)
1431 cmd->advertising |= ADVERTISED_1000baseT_Full;
1433 cmd->autoneg = AUTONEG_DISABLE;
1435 cmd->duplex = duplex;
1442 * First function called after registering the network device.
1443 * It's purpose is to initialize the device as an ethernet device,
1444 * fill the ethernet device structure with pointers * to functions,
1445 * and set the MAC address of the interface
1447 * Input : struct device *
1448 * Output : -ENOMEM if failed , 0 if success
1450 static int mv643xx_eth_probe(struct platform_device *pdev)
1452 struct mv643xx_eth_platform_data *pd;
1453 int port_num = pdev->id;
1454 struct mv643xx_private *mp;
1455 struct net_device *dev;
1457 struct resource *res;
1459 struct ethtool_cmd cmd;
1460 int duplex = DUPLEX_HALF;
1461 int speed = 0; /* default to auto-negotiation */
1463 dev = alloc_etherdev(sizeof(struct mv643xx_private));
1467 platform_set_drvdata(pdev, dev);
1469 mp = netdev_priv(dev);
1471 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1473 dev->irq = res->start;
1475 mp->port_num = port_num;
1477 dev->open = mv643xx_eth_open;
1478 dev->stop = mv643xx_eth_stop;
1479 dev->hard_start_xmit = mv643xx_eth_start_xmit;
1480 dev->get_stats = mv643xx_eth_get_stats;
1481 dev->set_mac_address = mv643xx_eth_set_mac_address;
1482 dev->set_multicast_list = mv643xx_eth_set_rx_mode;
1484 /* No need to Tx Timeout */
1485 dev->tx_timeout = mv643xx_eth_tx_timeout;
1487 dev->poll = mv643xx_poll;
1491 #ifdef CONFIG_NET_POLL_CONTROLLER
1492 dev->poll_controller = mv643xx_netpoll;
1495 dev->watchdog_timeo = 2 * HZ;
1496 dev->tx_queue_len = mp->tx_ring_size;
1498 dev->change_mtu = mv643xx_eth_change_mtu;
1499 dev->do_ioctl = mv643xx_eth_do_ioctl;
1500 SET_ETHTOOL_OPS(dev, &mv643xx_ethtool_ops);
1502 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
1503 #ifdef MAX_SKB_FRAGS
1505 * Zero copy can only work if we use Discovery II memory. Else, we will
1506 * have to map the buffers to ISA memory which is only 16 MB
1508 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM;
1512 /* Configure the timeout task */
1513 INIT_WORK(&mp->tx_timeout_task,
1514 (void (*)(void *))mv643xx_eth_tx_timeout_task, dev);
1516 spin_lock_init(&mp->lock);
1518 /* set default config values */
1519 eth_port_uc_addr_get(dev, dev->dev_addr);
1520 mp->rx_ring_size = MV643XX_ETH_PORT_DEFAULT_RECEIVE_QUEUE_SIZE;
1521 mp->tx_ring_size = MV643XX_ETH_PORT_DEFAULT_TRANSMIT_QUEUE_SIZE;
1523 pd = pdev->dev.platform_data;
1526 memcpy(dev->dev_addr, pd->mac_addr, 6);
1528 if (pd->phy_addr || pd->force_phy_addr)
1529 ethernet_phy_set(port_num, pd->phy_addr);
1531 if (pd->rx_queue_size)
1532 mp->rx_ring_size = pd->rx_queue_size;
1534 if (pd->tx_queue_size)
1535 mp->tx_ring_size = pd->tx_queue_size;
1537 if (pd->tx_sram_size) {
1538 mp->tx_sram_size = pd->tx_sram_size;
1539 mp->tx_sram_addr = pd->tx_sram_addr;
1542 if (pd->rx_sram_size) {
1543 mp->rx_sram_size = pd->rx_sram_size;
1544 mp->rx_sram_addr = pd->rx_sram_addr;
1547 duplex = pd->duplex;
1551 /* Hook up MII support for ethtool */
1553 mp->mii.mdio_read = mv643xx_mdio_read;
1554 mp->mii.mdio_write = mv643xx_mdio_write;
1555 mp->mii.phy_id = ethernet_phy_get(port_num);
1556 mp->mii.phy_id_mask = 0x3f;
1557 mp->mii.reg_num_mask = 0x1f;
1559 err = ethernet_phy_detect(port_num);
1561 pr_debug("MV643xx ethernet port %d: "
1562 "No PHY detected at addr %d\n",
1563 port_num, ethernet_phy_get(port_num));
1567 ethernet_phy_reset(port_num);
1568 mp->mii.supports_gmii = mii_check_gmii_support(&mp->mii);
1569 mv643xx_init_ethtool_cmd(dev, mp->mii.phy_id, speed, duplex, &cmd);
1570 mv643xx_eth_update_pscr(dev, &cmd);
1571 mv643xx_set_settings(dev, &cmd);
1573 err = register_netdev(dev);
1579 "%s: port %d with MAC address %02x:%02x:%02x:%02x:%02x:%02x\n",
1580 dev->name, port_num, p[0], p[1], p[2], p[3], p[4], p[5]);
1582 if (dev->features & NETIF_F_SG)
1583 printk(KERN_NOTICE "%s: Scatter Gather Enabled\n", dev->name);
1585 if (dev->features & NETIF_F_IP_CSUM)
1586 printk(KERN_NOTICE "%s: TX TCP/IP Checksumming Supported\n",
1589 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
1590 printk(KERN_NOTICE "%s: RX TCP/UDP Checksum Offload ON \n", dev->name);
1594 printk(KERN_NOTICE "%s: TX and RX Interrupt Coalescing ON \n",
1599 printk(KERN_NOTICE "%s: RX NAPI Enabled \n", dev->name);
1602 if (mp->tx_sram_size > 0)
1603 printk(KERN_NOTICE "%s: Using SRAM\n", dev->name);
1613 static int mv643xx_eth_remove(struct platform_device *pdev)
1615 struct net_device *dev = platform_get_drvdata(pdev);
1617 unregister_netdev(dev);
1618 flush_scheduled_work();
1621 platform_set_drvdata(pdev, NULL);
1625 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
1627 struct resource *res;
1629 printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n");
1631 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1635 mv643xx_eth_shared_base = ioremap(res->start,
1636 MV643XX_ETH_SHARED_REGS_SIZE);
1637 if (mv643xx_eth_shared_base == NULL)
1644 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
1646 iounmap(mv643xx_eth_shared_base);
1647 mv643xx_eth_shared_base = NULL;
1652 static struct platform_driver mv643xx_eth_driver = {
1653 .probe = mv643xx_eth_probe,
1654 .remove = mv643xx_eth_remove,
1656 .name = MV643XX_ETH_NAME,
1660 static struct platform_driver mv643xx_eth_shared_driver = {
1661 .probe = mv643xx_eth_shared_probe,
1662 .remove = mv643xx_eth_shared_remove,
1664 .name = MV643XX_ETH_SHARED_NAME,
1669 * mv643xx_init_module
1671 * Registers the network drivers into the Linux kernel
1677 static int __init mv643xx_init_module(void)
1681 rc = platform_driver_register(&mv643xx_eth_shared_driver);
1683 rc = platform_driver_register(&mv643xx_eth_driver);
1685 platform_driver_unregister(&mv643xx_eth_shared_driver);
1691 * mv643xx_cleanup_module
1693 * Registers the network drivers into the Linux kernel
1699 static void __exit mv643xx_cleanup_module(void)
1701 platform_driver_unregister(&mv643xx_eth_driver);
1702 platform_driver_unregister(&mv643xx_eth_shared_driver);
1705 module_init(mv643xx_init_module);
1706 module_exit(mv643xx_cleanup_module);
1708 MODULE_LICENSE("GPL");
1709 MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani"
1710 " and Dale Farnsworth");
1711 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
1714 * The second part is the low level driver of the gigE ethernet ports.
1718 * Marvell's Gigabit Ethernet controller low level driver
1721 * This file introduce low level API to Marvell's Gigabit Ethernet
1722 * controller. This Gigabit Ethernet Controller driver API controls
1723 * 1) Operations (i.e. port init, start, reset etc').
1724 * 2) Data flow (i.e. port send, receive etc').
1725 * Each Gigabit Ethernet port is controlled via
1726 * struct mv643xx_private.
1727 * This struct includes user configuration information as well as
1728 * driver internal data needed for its operations.
1730 * Supported Features:
1731 * - This low level driver is OS independent. Allocating memory for
1732 * the descriptor rings and buffers are not within the scope of
1734 * - The user is free from Rx/Tx queue managing.
1735 * - This low level driver introduce functionality API that enable
1736 * the to operate Marvell's Gigabit Ethernet Controller in a
1738 * - Simple Gigabit Ethernet port operation API.
1739 * - Simple Gigabit Ethernet port data flow API.
1740 * - Data flow and operation API support per queue functionality.
1741 * - Support cached descriptors for better performance.
1742 * - Enable access to all four DRAM banks and internal SRAM memory
1744 * - PHY access and control API.
1745 * - Port control register configuration API.
1746 * - Full control over Unicast and Multicast MAC configurations.
1750 * Initialization phase
1751 * This phase complete the initialization of the the
1752 * mv643xx_private struct.
1753 * User information regarding port configuration has to be set
1754 * prior to calling the port initialization routine.
1756 * In this phase any port Tx/Rx activity is halted, MIB counters
1757 * are cleared, PHY address is set according to user parameter and
1758 * access to DRAM and internal SRAM memory spaces.
1760 * Driver ring initialization
1761 * Allocating memory for the descriptor rings and buffers is not
1762 * within the scope of this driver. Thus, the user is required to
1763 * allocate memory for the descriptors ring and buffers. Those
1764 * memory parameters are used by the Rx and Tx ring initialization
1765 * routines in order to curve the descriptor linked list in a form
1767 * Note: Pay special attention to alignment issues when using
1768 * cached descriptors/buffers. In this phase the driver store
1769 * information in the mv643xx_private struct regarding each queue
1773 * This phase prepares the Ethernet port for Rx and Tx activity.
1774 * It uses the information stored in the mv643xx_private struct to
1775 * initialize the various port registers.
1778 * All packet references to/from the driver are done using
1780 * This struct is a unified struct used with Rx and Tx operations.
1781 * This way the user is not required to be familiar with neither
1782 * Tx nor Rx descriptors structures.
1783 * The driver's descriptors rings are management by indexes.
1784 * Those indexes controls the ring resources and used to indicate
1785 * a SW resource error:
1787 * This index points to the current available resource for use. For
1788 * example in Rx process this index will point to the descriptor
1789 * that will be passed to the user upon calling the receive
1790 * routine. In Tx process, this index will point to the descriptor
1791 * that will be assigned with the user packet info and transmitted.
1793 * This index points to the descriptor that need to restore its
1794 * resources. For example in Rx process, using the Rx buffer return
1795 * API will attach the buffer returned in packet info to the
1796 * descriptor pointed by 'used'. In Tx process, using the Tx
1797 * descriptor return will merely return the user packet info with
1798 * the command status of the transmitted buffer pointed by the
1799 * 'used' index. Nevertheless, it is essential to use this routine
1800 * to update the 'used' index.
1802 * This index supports Tx Scatter-Gather. It points to the first
1803 * descriptor of a packet assembled of multiple buffers. For
1804 * example when in middle of Such packet we have a Tx resource
1805 * error the 'curr' index get the value of 'first' to indicate
1806 * that the ring returned to its state before trying to transmit
1809 * Receive operation:
1810 * The eth_port_receive API set the packet information struct,
1811 * passed by the caller, with received information from the
1812 * 'current' SDMA descriptor.
1813 * It is the user responsibility to return this resource back
1814 * to the Rx descriptor ring to enable the reuse of this source.
1815 * Return Rx resource is done using the eth_rx_return_buff API.
1817 * Transmit operation:
1818 * The eth_port_send API supports Scatter-Gather which enables to
1819 * send a packet spanned over multiple buffers. This means that
1820 * for each packet info structure given by the user and put into
1821 * the Tx descriptors ring, will be transmitted only if the 'LAST'
1822 * bit will be set in the packet info command status field. This
1823 * API also consider restriction regarding buffer alignments and
1825 * The user must return a Tx resource after ensuring the buffer
1826 * has been transmitted to enable the Tx ring indexes to update.
1829 * This device is on-board. No jumper diagram is necessary.
1831 * EXTERNAL INTERFACE
1833 * Prior to calling the initialization routine eth_port_init() the user
1834 * must set the following fields under mv643xx_private struct:
1835 * port_num User Ethernet port number.
1836 * port_config User port configuration value.
1837 * port_config_extend User port config extend value.
1838 * port_sdma_config User port SDMA config value.
1839 * port_serial_control User port serial control value.
1841 * This driver data flow is done using the struct pkt_info which
1842 * is a unified struct for Rx and Tx operations:
1844 * byte_cnt Tx/Rx descriptor buffer byte count.
1845 * l4i_chk CPU provided TCP Checksum. For Tx operation
1847 * cmd_sts Tx/Rx descriptor command status.
1848 * buf_ptr Tx/Rx descriptor buffer pointer.
1849 * return_info Tx/Rx user resource return information.
1853 static int ethernet_phy_get(unsigned int eth_port_num);
1854 static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr);
1856 /* Ethernet Port routines */
1857 static void eth_port_set_filter_table_entry(int table, unsigned char entry);
1860 * eth_port_init - Initialize the Ethernet port driver
1863 * This function prepares the ethernet port to start its activity:
1864 * 1) Completes the ethernet port driver struct initialization toward port
1866 * 2) Resets the device to a quiescent state in case of warm reboot.
1867 * 3) Enable SDMA access to all four DRAM banks as well as internal SRAM.
1868 * 4) Clean MAC tables. The reset status of those tables is unknown.
1869 * 5) Set PHY address.
1870 * Note: Call this routine prior to eth_port_start routine and after
1871 * setting user values in the user fields of Ethernet port control
1875 * struct mv643xx_private *mp Ethernet port control struct
1883 static void eth_port_init(struct mv643xx_private *mp)
1885 mp->rx_resource_err = 0;
1886 mp->tx_resource_err = 0;
1888 eth_port_reset(mp->port_num);
1890 eth_port_init_mac_tables(mp->port_num);
1894 * eth_port_start - Start the Ethernet port activity.
1897 * This routine prepares the Ethernet port for Rx and Tx activity:
1898 * 1. Initialize Tx and Rx Current Descriptor Pointer for each queue that
1899 * has been initialized a descriptor's ring (using
1900 * ether_init_tx_desc_ring for Tx and ether_init_rx_desc_ring for Rx)
1901 * 2. Initialize and enable the Ethernet configuration port by writing to
1902 * the port's configuration and command registers.
1903 * 3. Initialize and enable the SDMA by writing to the SDMA's
1904 * configuration and command registers. After completing these steps,
1905 * the ethernet port SDMA can starts to perform Rx and Tx activities.
1907 * Note: Each Rx and Tx queue descriptor's list must be initialized prior
1908 * to calling this function (use ether_init_tx_desc_ring for Tx queues
1909 * and ether_init_rx_desc_ring for Rx queues).
1912 * dev - a pointer to the required interface
1915 * Ethernet port is ready to receive and transmit.
1920 static void eth_port_start(struct net_device *dev)
1922 struct mv643xx_private *mp = netdev_priv(dev);
1923 unsigned int port_num = mp->port_num;
1924 int tx_curr_desc, rx_curr_desc;
1926 struct ethtool_cmd ethtool_cmd;
1928 /* Assignment of Tx CTRP of given queue */
1929 tx_curr_desc = mp->tx_curr_desc_q;
1930 mv_write(MV643XX_ETH_TX_CURRENT_QUEUE_DESC_PTR_0(port_num),
1931 (u32)((struct eth_tx_desc *)mp->tx_desc_dma + tx_curr_desc));
1933 /* Assignment of Rx CRDP of given queue */
1934 rx_curr_desc = mp->rx_curr_desc_q;
1935 mv_write(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num),
1936 (u32)((struct eth_rx_desc *)mp->rx_desc_dma + rx_curr_desc));
1938 /* Add the assigned Ethernet address to the port's address table */
1939 eth_port_uc_addr_set(port_num, dev->dev_addr);
1941 /* Assign port configuration and command. */
1942 mv_write(MV643XX_ETH_PORT_CONFIG_REG(port_num),
1943 MV643XX_ETH_PORT_CONFIG_DEFAULT_VALUE);
1945 mv_write(MV643XX_ETH_PORT_CONFIG_EXTEND_REG(port_num),
1946 MV643XX_ETH_PORT_CONFIG_EXTEND_DEFAULT_VALUE);
1948 pscr = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num));
1950 pscr &= ~(MV643XX_ETH_SERIAL_PORT_ENABLE | MV643XX_ETH_FORCE_LINK_PASS);
1951 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr);
1953 pscr |= MV643XX_ETH_DISABLE_AUTO_NEG_FOR_FLOW_CTRL |
1954 MV643XX_ETH_DISABLE_AUTO_NEG_SPEED_GMII |
1955 MV643XX_ETH_DISABLE_AUTO_NEG_FOR_DUPLX |
1956 MV643XX_ETH_DO_NOT_FORCE_LINK_FAIL |
1957 MV643XX_ETH_SERIAL_PORT_CONTROL_RESERVED;
1959 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr);
1961 pscr |= MV643XX_ETH_SERIAL_PORT_ENABLE;
1962 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), pscr);
1964 /* Assign port SDMA configuration */
1965 mv_write(MV643XX_ETH_SDMA_CONFIG_REG(port_num),
1966 MV643XX_ETH_PORT_SDMA_CONFIG_DEFAULT_VALUE);
1968 /* Enable port Rx. */
1969 mv643xx_eth_port_enable_rx(port_num, mp->port_rx_queue_command);
1971 /* Disable port bandwidth limits by clearing MTU register */
1972 mv_write(MV643XX_ETH_MAXIMUM_TRANSMIT_UNIT(port_num), 0);
1974 /* save phy settings across reset */
1975 mv643xx_get_settings(dev, ðtool_cmd);
1976 ethernet_phy_reset(mp->port_num);
1977 mv643xx_set_settings(dev, ðtool_cmd);
1981 * eth_port_uc_addr_set - This function Set the port Unicast address.
1984 * This function Set the port Ethernet MAC address.
1987 * unsigned int eth_port_num Port number.
1988 * char * p_addr Address to be set
1991 * Set MAC address low and high registers. also calls
1992 * eth_port_set_filter_table_entry() to set the unicast
1993 * table with the proper information.
1999 static void eth_port_uc_addr_set(unsigned int eth_port_num,
2000 unsigned char *p_addr)
2006 mac_l = (p_addr[4] << 8) | (p_addr[5]);
2007 mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) |
2010 mv_write(MV643XX_ETH_MAC_ADDR_LOW(eth_port_num), mac_l);
2011 mv_write(MV643XX_ETH_MAC_ADDR_HIGH(eth_port_num), mac_h);
2013 /* Accept frames of this address */
2014 table = MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE(eth_port_num);
2015 eth_port_set_filter_table_entry(table, p_addr[5] & 0x0f);
2019 * eth_port_uc_addr_get - This function retrieves the port Unicast address
2020 * (MAC address) from the ethernet hw registers.
2023 * This function retrieves the port Ethernet MAC address.
2026 * unsigned int eth_port_num Port number.
2027 * char *MacAddr pointer where the MAC address is stored
2030 * Copy the MAC address to the location pointed to by MacAddr
2036 static void eth_port_uc_addr_get(struct net_device *dev, unsigned char *p_addr)
2038 struct mv643xx_private *mp = netdev_priv(dev);
2042 mac_h = mv_read(MV643XX_ETH_MAC_ADDR_HIGH(mp->port_num));
2043 mac_l = mv_read(MV643XX_ETH_MAC_ADDR_LOW(mp->port_num));
2045 p_addr[0] = (mac_h >> 24) & 0xff;
2046 p_addr[1] = (mac_h >> 16) & 0xff;
2047 p_addr[2] = (mac_h >> 8) & 0xff;
2048 p_addr[3] = mac_h & 0xff;
2049 p_addr[4] = (mac_l >> 8) & 0xff;
2050 p_addr[5] = mac_l & 0xff;
2054 * The entries in each table are indexed by a hash of a packet's MAC
2055 * address. One bit in each entry determines whether the packet is
2056 * accepted. There are 4 entries (each 8 bits wide) in each register
2057 * of the table. The bits in each entry are defined as follows:
2058 * 0 Accept=1, Drop=0
2059 * 3-1 Queue (ETH_Q0=0)
2062 static void eth_port_set_filter_table_entry(int table, unsigned char entry)
2064 unsigned int table_reg;
2065 unsigned int tbl_offset;
2066 unsigned int reg_offset;
2068 tbl_offset = (entry / 4) * 4; /* Register offset of DA table entry */
2069 reg_offset = entry % 4; /* Entry offset within the register */
2071 /* Set "accepts frame bit" at specified table entry */
2072 table_reg = mv_read(table + tbl_offset);
2073 table_reg |= 0x01 << (8 * reg_offset);
2074 mv_write(table + tbl_offset, table_reg);
2078 * eth_port_mc_addr - Multicast address settings.
2080 * The MV device supports multicast using two tables:
2081 * 1) Special Multicast Table for MAC addresses of the form
2082 * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_FF).
2083 * The MAC DA[7:0] bits are used as a pointer to the Special Multicast
2084 * Table entries in the DA-Filter table.
2085 * 2) Other Multicast Table for multicast of another type. A CRC-8bit
2086 * is used as an index to the Other Multicast Table entries in the
2087 * DA-Filter table. This function calculates the CRC-8bit value.
2088 * In either case, eth_port_set_filter_table_entry() is then called
2089 * to set to set the actual table entry.
2091 static void eth_port_mc_addr(unsigned int eth_port_num, unsigned char *p_addr)
2095 unsigned char crc_result = 0;
2101 if ((p_addr[0] == 0x01) && (p_addr[1] == 0x00) &&
2102 (p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00)) {
2103 table = MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
2105 eth_port_set_filter_table_entry(table, p_addr[5]);
2109 /* Calculate CRC-8 out of the given address */
2110 mac_h = (p_addr[0] << 8) | (p_addr[1]);
2111 mac_l = (p_addr[2] << 24) | (p_addr[3] << 16) |
2112 (p_addr[4] << 8) | (p_addr[5] << 0);
2114 for (i = 0; i < 32; i++)
2115 mac_array[i] = (mac_l >> i) & 0x1;
2116 for (i = 32; i < 48; i++)
2117 mac_array[i] = (mac_h >> (i - 32)) & 0x1;
2119 crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^ mac_array[39] ^
2120 mac_array[35] ^ mac_array[34] ^ mac_array[31] ^ mac_array[30] ^
2121 mac_array[28] ^ mac_array[23] ^ mac_array[21] ^ mac_array[19] ^
2122 mac_array[18] ^ mac_array[16] ^ mac_array[14] ^ mac_array[12] ^
2123 mac_array[8] ^ mac_array[7] ^ mac_array[6] ^ mac_array[0];
2125 crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^
2126 mac_array[41] ^ mac_array[39] ^ mac_array[36] ^ mac_array[34] ^
2127 mac_array[32] ^ mac_array[30] ^ mac_array[29] ^ mac_array[28] ^
2128 mac_array[24] ^ mac_array[23] ^ mac_array[22] ^ mac_array[21] ^
2129 mac_array[20] ^ mac_array[18] ^ mac_array[17] ^ mac_array[16] ^
2130 mac_array[15] ^ mac_array[14] ^ mac_array[13] ^ mac_array[12] ^
2131 mac_array[9] ^ mac_array[6] ^ mac_array[1] ^ mac_array[0];
2133 crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^ mac_array[43] ^
2134 mac_array[42] ^ mac_array[39] ^ mac_array[37] ^ mac_array[34] ^
2135 mac_array[33] ^ mac_array[29] ^ mac_array[28] ^ mac_array[25] ^
2136 mac_array[24] ^ mac_array[22] ^ mac_array[17] ^ mac_array[15] ^
2137 mac_array[13] ^ mac_array[12] ^ mac_array[10] ^ mac_array[8] ^
2138 mac_array[6] ^ mac_array[2] ^ mac_array[1] ^ mac_array[0];
2140 crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^ mac_array[43] ^
2141 mac_array[40] ^ mac_array[38] ^ mac_array[35] ^ mac_array[34] ^
2142 mac_array[30] ^ mac_array[29] ^ mac_array[26] ^ mac_array[25] ^
2143 mac_array[23] ^ mac_array[18] ^ mac_array[16] ^ mac_array[14] ^
2144 mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[7] ^
2145 mac_array[3] ^ mac_array[2] ^ mac_array[1];
2147 crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^ mac_array[41] ^
2148 mac_array[39] ^ mac_array[36] ^ mac_array[35] ^ mac_array[31] ^
2149 mac_array[30] ^ mac_array[27] ^ mac_array[26] ^ mac_array[24] ^
2150 mac_array[19] ^ mac_array[17] ^ mac_array[15] ^ mac_array[14] ^
2151 mac_array[12] ^ mac_array[10] ^ mac_array[8] ^ mac_array[4] ^
2152 mac_array[3] ^ mac_array[2];
2154 crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^ mac_array[42] ^
2155 mac_array[40] ^ mac_array[37] ^ mac_array[36] ^ mac_array[32] ^
2156 mac_array[31] ^ mac_array[28] ^ mac_array[27] ^ mac_array[25] ^
2157 mac_array[20] ^ mac_array[18] ^ mac_array[16] ^ mac_array[15] ^
2158 mac_array[13] ^ mac_array[11] ^ mac_array[9] ^ mac_array[5] ^
2159 mac_array[4] ^ mac_array[3];
2161 crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^ mac_array[41] ^
2162 mac_array[38] ^ mac_array[37] ^ mac_array[33] ^ mac_array[32] ^
2163 mac_array[29] ^ mac_array[28] ^ mac_array[26] ^ mac_array[21] ^
2164 mac_array[19] ^ mac_array[17] ^ mac_array[16] ^ mac_array[14] ^
2165 mac_array[12] ^ mac_array[10] ^ mac_array[6] ^ mac_array[5] ^
2168 crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^ mac_array[39] ^
2169 mac_array[38] ^ mac_array[34] ^ mac_array[33] ^ mac_array[30] ^
2170 mac_array[29] ^ mac_array[27] ^ mac_array[22] ^ mac_array[20] ^
2171 mac_array[18] ^ mac_array[17] ^ mac_array[15] ^ mac_array[13] ^
2172 mac_array[11] ^ mac_array[7] ^ mac_array[6] ^ mac_array[5];
2174 for (i = 0; i < 8; i++)
2175 crc_result = crc_result | (crc[i] << i);
2177 table = MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num);
2178 eth_port_set_filter_table_entry(table, crc_result);
2182 * Set the entire multicast list based on dev->mc_list.
2184 static void eth_port_set_multicast_list(struct net_device *dev)
2187 struct dev_mc_list *mc_list;
2190 struct mv643xx_private *mp = netdev_priv(dev);
2191 unsigned int eth_port_num = mp->port_num;
2193 /* If the device is in promiscuous mode or in all multicast mode,
2194 * we will fully populate both multicast tables with accept.
2195 * This is guaranteed to yield a match on all multicast addresses...
2197 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) {
2198 for (table_index = 0; table_index <= 0xFC; table_index += 4) {
2199 /* Set all entries in DA filter special multicast
2201 * Set for ETH_Q0 for now
2203 * 0 Accept=1, Drop=0
2204 * 3-1 Queue ETH_Q0=0
2207 mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101);
2209 /* Set all entries in DA filter other multicast
2211 * Set for ETH_Q0 for now
2213 * 0 Accept=1, Drop=0
2214 * 3-1 Queue ETH_Q0=0
2217 mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num) + table_index, 0x01010101);
2222 /* We will clear out multicast tables every time we get the list.
2223 * Then add the entire new list...
2225 for (table_index = 0; table_index <= 0xFC; table_index += 4) {
2226 /* Clear DA filter special multicast table (Ex_dFSMT) */
2227 mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
2228 (eth_port_num) + table_index, 0);
2230 /* Clear DA filter other multicast table (Ex_dFOMT) */
2231 mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE
2232 (eth_port_num) + table_index, 0);
2235 /* Get pointer to net_device multicast list and add each one... */
2236 for (i = 0, mc_list = dev->mc_list;
2237 (i < 256) && (mc_list != NULL) && (i < dev->mc_count);
2238 i++, mc_list = mc_list->next)
2239 if (mc_list->dmi_addrlen == 6)
2240 eth_port_mc_addr(eth_port_num, mc_list->dmi_addr);
2244 * eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
2247 * Go through all the DA filter tables (Unicast, Special Multicast &
2248 * Other Multicast) and set each entry to 0.
2251 * unsigned int eth_port_num Ethernet Port number.
2254 * Multicast and Unicast packets are rejected.
2259 static void eth_port_init_mac_tables(unsigned int eth_port_num)
2263 /* Clear DA filter unicast table (Ex_dFUT) */
2264 for (table_index = 0; table_index <= 0xC; table_index += 4)
2265 mv_write(MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
2266 (eth_port_num) + table_index, 0);
2268 for (table_index = 0; table_index <= 0xFC; table_index += 4) {
2269 /* Clear DA filter special multicast table (Ex_dFSMT) */
2270 mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
2271 (eth_port_num) + table_index, 0);
2272 /* Clear DA filter other multicast table (Ex_dFOMT) */
2273 mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE
2274 (eth_port_num) + table_index, 0);
2279 * eth_clear_mib_counters - Clear all MIB counters
2282 * This function clears all MIB counters of a specific ethernet port.
2283 * A read from the MIB counter will reset the counter.
2286 * unsigned int eth_port_num Ethernet Port number.
2289 * After reading all MIB counters, the counters resets.
2292 * MIB counter value.
2295 static void eth_clear_mib_counters(unsigned int eth_port_num)
2299 /* Perform dummy reads from MIB counters */
2300 for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION;
2302 mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(eth_port_num) + i);
2305 static inline u32 read_mib(struct mv643xx_private *mp, int offset)
2307 return mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(mp->port_num) + offset);
2310 static void eth_update_mib_counters(struct mv643xx_private *mp)
2312 struct mv643xx_mib_counters *p = &mp->mib_counters;
2315 p->good_octets_received +=
2316 read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_LOW);
2317 p->good_octets_received +=
2318 (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32;
2320 for (offset = ETH_MIB_BAD_OCTETS_RECEIVED;
2321 offset <= ETH_MIB_FRAMES_1024_TO_MAX_OCTETS;
2323 *(u32 *)((char *)p + offset) = read_mib(mp, offset);
2325 p->good_octets_sent += read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_LOW);
2326 p->good_octets_sent +=
2327 (u64)read_mib(mp, ETH_MIB_GOOD_OCTETS_SENT_HIGH) << 32;
2329 for (offset = ETH_MIB_GOOD_FRAMES_SENT;
2330 offset <= ETH_MIB_LATE_COLLISION;
2332 *(u32 *)((char *)p + offset) = read_mib(mp, offset);
2336 * ethernet_phy_detect - Detect whether a phy is present
2339 * This function tests whether there is a PHY present on
2340 * the specified port.
2343 * unsigned int eth_port_num Ethernet Port number.
2350 * -ENODEV on failure
2353 static int ethernet_phy_detect(unsigned int port_num)
2355 unsigned int phy_reg_data0;
2358 eth_port_read_smi_reg(port_num, 0, &phy_reg_data0);
2359 auto_neg = phy_reg_data0 & 0x1000;
2360 phy_reg_data0 ^= 0x1000; /* invert auto_neg */
2361 eth_port_write_smi_reg(port_num, 0, phy_reg_data0);
2363 eth_port_read_smi_reg(port_num, 0, &phy_reg_data0);
2364 if ((phy_reg_data0 & 0x1000) == auto_neg)
2365 return -ENODEV; /* change didn't take */
2367 phy_reg_data0 ^= 0x1000;
2368 eth_port_write_smi_reg(port_num, 0, phy_reg_data0);
2373 * ethernet_phy_get - Get the ethernet port PHY address.
2376 * This routine returns the given ethernet port PHY address.
2379 * unsigned int eth_port_num Ethernet Port number.
2388 static int ethernet_phy_get(unsigned int eth_port_num)
2390 unsigned int reg_data;
2392 reg_data = mv_read(MV643XX_ETH_PHY_ADDR_REG);
2394 return ((reg_data >> (5 * eth_port_num)) & 0x1f);
2398 * ethernet_phy_set - Set the ethernet port PHY address.
2401 * This routine sets the given ethernet port PHY address.
2404 * unsigned int eth_port_num Ethernet Port number.
2405 * int phy_addr PHY address.
2414 static void ethernet_phy_set(unsigned int eth_port_num, int phy_addr)
2417 int addr_shift = 5 * eth_port_num;
2419 reg_data = mv_read(MV643XX_ETH_PHY_ADDR_REG);
2420 reg_data &= ~(0x1f << addr_shift);
2421 reg_data |= (phy_addr & 0x1f) << addr_shift;
2422 mv_write(MV643XX_ETH_PHY_ADDR_REG, reg_data);
2426 * ethernet_phy_reset - Reset Ethernet port PHY.
2429 * This routine utilizes the SMI interface to reset the ethernet port PHY.
2432 * unsigned int eth_port_num Ethernet Port number.
2441 static void ethernet_phy_reset(unsigned int eth_port_num)
2443 unsigned int phy_reg_data;
2446 eth_port_read_smi_reg(eth_port_num, 0, &phy_reg_data);
2447 phy_reg_data |= 0x8000; /* Set bit 15 to reset the PHY */
2448 eth_port_write_smi_reg(eth_port_num, 0, phy_reg_data);
2450 /* wait for PHY to come out of reset */
2453 eth_port_read_smi_reg(eth_port_num, 0, &phy_reg_data);
2454 } while (phy_reg_data & 0x8000);
2457 static void mv643xx_eth_port_enable_tx(unsigned int port_num,
2458 unsigned int channels)
2460 mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num), channels);
2463 static void mv643xx_eth_port_enable_rx(unsigned int port_num,
2464 unsigned int channels)
2466 mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num), channels);
2469 static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num)
2473 /* Stop Tx port activity. Check port Tx activity. */
2474 channels = mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num))
2477 /* Issue stop command for active channels only */
2478 mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num),
2481 /* Wait for all Tx activity to terminate. */
2482 /* Check port cause register that all Tx queues are stopped */
2483 while (mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num))
2485 udelay(PHY_WAIT_MICRO_SECONDS);
2487 /* Wait for Tx FIFO to empty */
2488 while (mv_read(MV643XX_ETH_PORT_STATUS_REG(port_num)) &
2489 ETH_PORT_TX_FIFO_EMPTY)
2490 udelay(PHY_WAIT_MICRO_SECONDS);
2496 static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num)
2500 /* Stop Rx port activity. Check port Rx activity. */
2501 channels = mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num)
2504 /* Issue stop command for active channels only */
2505 mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num),
2508 /* Wait for all Rx activity to terminate. */
2509 /* Check port cause register that all Rx queues are stopped */
2510 while (mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num))
2512 udelay(PHY_WAIT_MICRO_SECONDS);
2519 * eth_port_reset - Reset Ethernet port
2522 * This routine resets the chip by aborting any SDMA engine activity and
2523 * clearing the MIB counters. The Receiver and the Transmit unit are in
2524 * idle state after this command is performed and the port is disabled.
2527 * unsigned int eth_port_num Ethernet Port number.
2530 * Channel activity is halted.
2536 static void eth_port_reset(unsigned int port_num)
2538 unsigned int reg_data;
2540 mv643xx_eth_port_disable_tx(port_num);
2541 mv643xx_eth_port_disable_rx(port_num);
2543 /* Clear all MIB counters */
2544 eth_clear_mib_counters(port_num);
2546 /* Reset the Enable bit in the Configuration Register */
2547 reg_data = mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num));
2548 reg_data &= ~(MV643XX_ETH_SERIAL_PORT_ENABLE |
2549 MV643XX_ETH_DO_NOT_FORCE_LINK_FAIL |
2550 MV643XX_ETH_FORCE_LINK_PASS);
2551 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num), reg_data);
2556 * eth_port_read_smi_reg - Read PHY registers
2559 * This routine utilize the SMI interface to interact with the PHY in
2560 * order to perform PHY register read.
2563 * unsigned int port_num Ethernet Port number.
2564 * unsigned int phy_reg PHY register address offset.
2565 * unsigned int *value Register value buffer.
2568 * Write the value of a specified PHY register into given buffer.
2571 * false if the PHY is busy or read data is not in valid state.
2575 static void eth_port_read_smi_reg(unsigned int port_num,
2576 unsigned int phy_reg, unsigned int *value)
2578 int phy_addr = ethernet_phy_get(port_num);
2579 unsigned long flags;
2582 /* the SMI register is a shared resource */
2583 spin_lock_irqsave(&mv643xx_eth_phy_lock, flags);
2585 /* wait for the SMI register to become available */
2586 for (i = 0; mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_BUSY; i++) {
2587 if (i == PHY_WAIT_ITERATIONS) {
2588 printk("mv643xx PHY busy timeout, port %d\n", port_num);
2591 udelay(PHY_WAIT_MICRO_SECONDS);
2594 mv_write(MV643XX_ETH_SMI_REG,
2595 (phy_addr << 16) | (phy_reg << 21) | ETH_SMI_OPCODE_READ);
2597 /* now wait for the data to be valid */
2598 for (i = 0; !(mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_READ_VALID); i++) {
2599 if (i == PHY_WAIT_ITERATIONS) {
2600 printk("mv643xx PHY read timeout, port %d\n", port_num);
2603 udelay(PHY_WAIT_MICRO_SECONDS);
2606 *value = mv_read(MV643XX_ETH_SMI_REG) & 0xffff;
2608 spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags);
2612 * eth_port_write_smi_reg - Write to PHY registers
2615 * This routine utilize the SMI interface to interact with the PHY in
2616 * order to perform writes to PHY registers.
2619 * unsigned int eth_port_num Ethernet Port number.
2620 * unsigned int phy_reg PHY register address offset.
2621 * unsigned int value Register value.
2624 * Write the given value to the specified PHY register.
2627 * false if the PHY is busy.
2631 static void eth_port_write_smi_reg(unsigned int eth_port_num,
2632 unsigned int phy_reg, unsigned int value)
2636 unsigned long flags;
2638 phy_addr = ethernet_phy_get(eth_port_num);
2640 /* the SMI register is a shared resource */
2641 spin_lock_irqsave(&mv643xx_eth_phy_lock, flags);
2643 /* wait for the SMI register to become available */
2644 for (i = 0; mv_read(MV643XX_ETH_SMI_REG) & ETH_SMI_BUSY; i++) {
2645 if (i == PHY_WAIT_ITERATIONS) {
2646 printk("mv643xx PHY busy timeout, port %d\n",
2650 udelay(PHY_WAIT_MICRO_SECONDS);
2653 mv_write(MV643XX_ETH_SMI_REG, (phy_addr << 16) | (phy_reg << 21) |
2654 ETH_SMI_OPCODE_WRITE | (value & 0xffff));
2656 spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags);
2660 * Wrappers for MII support library.
2662 static int mv643xx_mdio_read(struct net_device *dev, int phy_id, int location)
2665 struct mv643xx_private *mp = netdev_priv(dev);
2667 eth_port_read_smi_reg(mp->port_num, location, &val);
2671 static void mv643xx_mdio_write(struct net_device *dev, int phy_id, int location, int val)
2673 struct mv643xx_private *mp = netdev_priv(dev);
2674 eth_port_write_smi_reg(mp->port_num, location, val);
2678 * eth_port_send - Send an Ethernet packet
2681 * This routine send a given packet described by p_pktinfo parameter. It
2682 * supports transmitting of a packet spaned over multiple buffers. The
2683 * routine updates 'curr' and 'first' indexes according to the packet
2684 * segment passed to the routine. In case the packet segment is first,
2685 * the 'first' index is update. In any case, the 'curr' index is updated.
2686 * If the routine get into Tx resource error it assigns 'curr' index as
2687 * 'first'. This way the function can abort Tx process of multiple
2688 * descriptors per packet.
2691 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2692 * struct pkt_info *p_pkt_info User packet buffer.
2695 * Tx ring 'curr' and 'first' indexes are updated.
2698 * ETH_QUEUE_FULL in case of Tx resource error.
2699 * ETH_ERROR in case the routine can not access Tx desc ring.
2700 * ETH_QUEUE_LAST_RESOURCE if the routine uses the last Tx resource.
2704 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
2706 * Modified to include the first descriptor pointer in case of SG
2708 static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp,
2709 struct pkt_info *p_pkt_info)
2711 int tx_desc_curr, tx_desc_used, tx_first_desc, tx_next_desc;
2712 struct eth_tx_desc *current_descriptor;
2713 struct eth_tx_desc *first_descriptor;
2716 /* Do not process Tx ring in case of Tx ring resource error */
2717 if (mp->tx_resource_err)
2718 return ETH_QUEUE_FULL;
2721 * The hardware requires that each buffer that is <= 8 bytes
2722 * in length must be aligned on an 8 byte boundary.
2724 if (p_pkt_info->byte_cnt <= 8 && p_pkt_info->buf_ptr & 0x7) {
2726 "mv643xx_eth port %d: packet size <= 8 problem\n",
2731 mp->tx_desc_count++;
2732 BUG_ON(mp->tx_desc_count > mp->tx_ring_size);
2734 /* Get the Tx Desc ring indexes */
2735 tx_desc_curr = mp->tx_curr_desc_q;
2736 tx_desc_used = mp->tx_used_desc_q;
2738 current_descriptor = &mp->p_tx_desc_area[tx_desc_curr];
2740 tx_next_desc = (tx_desc_curr + 1) % mp->tx_ring_size;
2742 current_descriptor->buf_ptr = p_pkt_info->buf_ptr;
2743 current_descriptor->byte_cnt = p_pkt_info->byte_cnt;
2744 current_descriptor->l4i_chk = p_pkt_info->l4i_chk;
2745 mp->tx_skb[tx_desc_curr] = p_pkt_info->return_info;
2747 command = p_pkt_info->cmd_sts | ETH_ZERO_PADDING | ETH_GEN_CRC |
2748 ETH_BUFFER_OWNED_BY_DMA;
2749 if (command & ETH_TX_FIRST_DESC) {
2750 tx_first_desc = tx_desc_curr;
2751 mp->tx_first_desc_q = tx_first_desc;
2752 first_descriptor = current_descriptor;
2753 mp->tx_first_command = command;
2755 tx_first_desc = mp->tx_first_desc_q;
2756 first_descriptor = &mp->p_tx_desc_area[tx_first_desc];
2757 BUG_ON(first_descriptor == NULL);
2758 current_descriptor->cmd_sts = command;
2761 if (command & ETH_TX_LAST_DESC) {
2763 first_descriptor->cmd_sts = mp->tx_first_command;
2766 mv643xx_eth_port_enable_tx(mp->port_num, mp->port_tx_queue_command);
2769 * Finish Tx packet. Update first desc in case of Tx resource
2771 tx_first_desc = tx_next_desc;
2772 mp->tx_first_desc_q = tx_first_desc;
2775 /* Check for ring index overlap in the Tx desc ring */
2776 if (tx_next_desc == tx_desc_used) {
2777 mp->tx_resource_err = 1;
2778 mp->tx_curr_desc_q = tx_first_desc;
2780 return ETH_QUEUE_LAST_RESOURCE;
2783 mp->tx_curr_desc_q = tx_next_desc;
2788 static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp,
2789 struct pkt_info *p_pkt_info)
2793 struct eth_tx_desc *current_descriptor;
2794 unsigned int command_status;
2796 /* Do not process Tx ring in case of Tx ring resource error */
2797 if (mp->tx_resource_err)
2798 return ETH_QUEUE_FULL;
2800 mp->tx_desc_count++;
2801 BUG_ON(mp->tx_desc_count > mp->tx_ring_size);
2803 /* Get the Tx Desc ring indexes */
2804 tx_desc_curr = mp->tx_curr_desc_q;
2805 tx_desc_used = mp->tx_used_desc_q;
2806 current_descriptor = &mp->p_tx_desc_area[tx_desc_curr];
2808 command_status = p_pkt_info->cmd_sts | ETH_ZERO_PADDING | ETH_GEN_CRC;
2809 current_descriptor->buf_ptr = p_pkt_info->buf_ptr;
2810 current_descriptor->byte_cnt = p_pkt_info->byte_cnt;
2811 mp->tx_skb[tx_desc_curr] = p_pkt_info->return_info;
2813 /* Set last desc with DMA ownership and interrupt enable. */
2815 current_descriptor->cmd_sts = command_status |
2816 ETH_BUFFER_OWNED_BY_DMA | ETH_TX_ENABLE_INTERRUPT;
2819 mv643xx_eth_port_enable_tx(mp->port_num, mp->port_tx_queue_command);
2821 /* Finish Tx packet. Update first desc in case of Tx resource error */
2822 tx_desc_curr = (tx_desc_curr + 1) % mp->tx_ring_size;
2824 /* Update the current descriptor */
2825 mp->tx_curr_desc_q = tx_desc_curr;
2827 /* Check for ring index overlap in the Tx desc ring */
2828 if (tx_desc_curr == tx_desc_used) {
2829 mp->tx_resource_err = 1;
2830 return ETH_QUEUE_LAST_RESOURCE;
2838 * eth_tx_return_desc - Free all used Tx descriptors
2841 * This routine returns the transmitted packet information to the caller.
2842 * It uses the 'first' index to support Tx desc return in case a transmit
2843 * of a packet spanned over multiple buffer still in process.
2844 * In case the Tx queue was in "resource error" condition, where there are
2845 * no available Tx resources, the function resets the resource error flag.
2848 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2849 * struct pkt_info *p_pkt_info User packet buffer.
2852 * Tx ring 'first' and 'used' indexes are updated.
2856 * ETH_ERROR otherwise.
2859 static ETH_FUNC_RET_STATUS eth_tx_return_desc(struct mv643xx_private *mp,
2860 struct pkt_info *p_pkt_info)
2864 struct eth_tx_desc *p_tx_desc_used;
2865 unsigned int command_status;
2866 unsigned long flags;
2869 spin_lock_irqsave(&mp->lock, flags);
2871 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
2872 tx_busy_desc = mp->tx_first_desc_q;
2874 tx_busy_desc = mp->tx_curr_desc_q;
2877 /* Get the Tx Desc ring indexes */
2878 tx_desc_used = mp->tx_used_desc_q;
2880 p_tx_desc_used = &mp->p_tx_desc_area[tx_desc_used];
2883 if (p_tx_desc_used == NULL) {
2888 /* Stop release. About to overlap the current available Tx descriptor */
2889 if (tx_desc_used == tx_busy_desc && !mp->tx_resource_err) {
2894 command_status = p_tx_desc_used->cmd_sts;
2896 /* Still transmitting... */
2897 if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
2902 /* Pass the packet information to the caller */
2903 p_pkt_info->cmd_sts = command_status;
2904 p_pkt_info->return_info = mp->tx_skb[tx_desc_used];
2905 p_pkt_info->buf_ptr = p_tx_desc_used->buf_ptr;
2906 p_pkt_info->byte_cnt = p_tx_desc_used->byte_cnt;
2907 mp->tx_skb[tx_desc_used] = NULL;
2909 /* Update the next descriptor to release. */
2910 mp->tx_used_desc_q = (tx_desc_used + 1) % mp->tx_ring_size;
2912 /* Any Tx return cancels the Tx resource error status */
2913 mp->tx_resource_err = 0;
2915 BUG_ON(mp->tx_desc_count == 0);
2916 mp->tx_desc_count--;
2919 spin_unlock_irqrestore(&mp->lock, flags);
2925 * eth_port_receive - Get received information from Rx ring.
2928 * This routine returns the received data to the caller. There is no
2929 * data copying during routine operation. All information is returned
2930 * using pointer to packet information struct passed from the caller.
2931 * If the routine exhausts Rx ring resources then the resource error flag
2935 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2936 * struct pkt_info *p_pkt_info User packet buffer.
2939 * Rx ring current and used indexes are updated.
2942 * ETH_ERROR in case the routine can not access Rx desc ring.
2943 * ETH_QUEUE_FULL if Rx ring resources are exhausted.
2944 * ETH_END_OF_JOB if there is no received data.
2947 static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp,
2948 struct pkt_info *p_pkt_info)
2950 int rx_next_curr_desc, rx_curr_desc, rx_used_desc;
2951 volatile struct eth_rx_desc *p_rx_desc;
2952 unsigned int command_status;
2953 unsigned long flags;
2955 /* Do not process Rx ring in case of Rx ring resource error */
2956 if (mp->rx_resource_err)
2957 return ETH_QUEUE_FULL;
2959 spin_lock_irqsave(&mp->lock, flags);
2961 /* Get the Rx Desc ring 'curr and 'used' indexes */
2962 rx_curr_desc = mp->rx_curr_desc_q;
2963 rx_used_desc = mp->rx_used_desc_q;
2965 p_rx_desc = &mp->p_rx_desc_area[rx_curr_desc];
2967 /* The following parameters are used to save readings from memory */
2968 command_status = p_rx_desc->cmd_sts;
2971 /* Nothing to receive... */
2972 if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
2973 spin_unlock_irqrestore(&mp->lock, flags);
2974 return ETH_END_OF_JOB;
2977 p_pkt_info->byte_cnt = (p_rx_desc->byte_cnt) - RX_BUF_OFFSET;
2978 p_pkt_info->cmd_sts = command_status;
2979 p_pkt_info->buf_ptr = (p_rx_desc->buf_ptr) + RX_BUF_OFFSET;
2980 p_pkt_info->return_info = mp->rx_skb[rx_curr_desc];
2981 p_pkt_info->l4i_chk = p_rx_desc->buf_size;
2984 * Clean the return info field to indicate that the
2985 * packet has been moved to the upper layers
2987 mp->rx_skb[rx_curr_desc] = NULL;
2989 /* Update current index in data structure */
2990 rx_next_curr_desc = (rx_curr_desc + 1) % mp->rx_ring_size;
2991 mp->rx_curr_desc_q = rx_next_curr_desc;
2993 /* Rx descriptors exhausted. Set the Rx ring resource error flag */
2994 if (rx_next_curr_desc == rx_used_desc)
2995 mp->rx_resource_err = 1;
2997 spin_unlock_irqrestore(&mp->lock, flags);
3003 * eth_rx_return_buff - Returns a Rx buffer back to the Rx ring.
3006 * This routine returns a Rx buffer back to the Rx ring. It retrieves the
3007 * next 'used' descriptor and attached the returned buffer to it.
3008 * In case the Rx ring was in "resource error" condition, where there are
3009 * no available Rx resources, the function resets the resource error flag.
3012 * struct mv643xx_private *mp Ethernet Port Control srtuct.
3013 * struct pkt_info *p_pkt_info Information on returned buffer.
3016 * New available Rx resource in Rx descriptor ring.
3019 * ETH_ERROR in case the routine can not access Rx desc ring.
3022 static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp,
3023 struct pkt_info *p_pkt_info)
3025 int used_rx_desc; /* Where to return Rx resource */
3026 volatile struct eth_rx_desc *p_used_rx_desc;
3027 unsigned long flags;
3029 spin_lock_irqsave(&mp->lock, flags);
3031 /* Get 'used' Rx descriptor */
3032 used_rx_desc = mp->rx_used_desc_q;
3033 p_used_rx_desc = &mp->p_rx_desc_area[used_rx_desc];
3035 p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr;
3036 p_used_rx_desc->buf_size = p_pkt_info->byte_cnt;
3037 mp->rx_skb[used_rx_desc] = p_pkt_info->return_info;
3039 /* Flush the write pipe */
3041 /* Return the descriptor to DMA ownership */
3043 p_used_rx_desc->cmd_sts =
3044 ETH_BUFFER_OWNED_BY_DMA | ETH_RX_ENABLE_INTERRUPT;
3047 /* Move the used descriptor pointer to the next descriptor */
3048 mp->rx_used_desc_q = (used_rx_desc + 1) % mp->rx_ring_size;
3050 /* Any Rx return cancels the Rx resource error status */
3051 mp->rx_resource_err = 0;
3053 spin_unlock_irqrestore(&mp->lock, flags);
3058 /************* Begin ethtool support *************************/
3060 struct mv643xx_stats {
3061 char stat_string[ETH_GSTRING_LEN];
3066 #define MV643XX_STAT(m) sizeof(((struct mv643xx_private *)0)->m), \
3067 offsetof(struct mv643xx_private, m)
3069 static const struct mv643xx_stats mv643xx_gstrings_stats[] = {
3070 { "rx_packets", MV643XX_STAT(stats.rx_packets) },
3071 { "tx_packets", MV643XX_STAT(stats.tx_packets) },
3072 { "rx_bytes", MV643XX_STAT(stats.rx_bytes) },
3073 { "tx_bytes", MV643XX_STAT(stats.tx_bytes) },
3074 { "rx_errors", MV643XX_STAT(stats.rx_errors) },
3075 { "tx_errors", MV643XX_STAT(stats.tx_errors) },
3076 { "rx_dropped", MV643XX_STAT(stats.rx_dropped) },
3077 { "tx_dropped", MV643XX_STAT(stats.tx_dropped) },
3078 { "good_octets_received", MV643XX_STAT(mib_counters.good_octets_received) },
3079 { "bad_octets_received", MV643XX_STAT(mib_counters.bad_octets_received) },
3080 { "internal_mac_transmit_err", MV643XX_STAT(mib_counters.internal_mac_transmit_err) },
3081 { "good_frames_received", MV643XX_STAT(mib_counters.good_frames_received) },
3082 { "bad_frames_received", MV643XX_STAT(mib_counters.bad_frames_received) },
3083 { "broadcast_frames_received", MV643XX_STAT(mib_counters.broadcast_frames_received) },
3084 { "multicast_frames_received", MV643XX_STAT(mib_counters.multicast_frames_received) },
3085 { "frames_64_octets", MV643XX_STAT(mib_counters.frames_64_octets) },
3086 { "frames_65_to_127_octets", MV643XX_STAT(mib_counters.frames_65_to_127_octets) },
3087 { "frames_128_to_255_octets", MV643XX_STAT(mib_counters.frames_128_to_255_octets) },
3088 { "frames_256_to_511_octets", MV643XX_STAT(mib_counters.frames_256_to_511_octets) },
3089 { "frames_512_to_1023_octets", MV643XX_STAT(mib_counters.frames_512_to_1023_octets) },
3090 { "frames_1024_to_max_octets", MV643XX_STAT(mib_counters.frames_1024_to_max_octets) },
3091 { "good_octets_sent", MV643XX_STAT(mib_counters.good_octets_sent) },
3092 { "good_frames_sent", MV643XX_STAT(mib_counters.good_frames_sent) },
3093 { "excessive_collision", MV643XX_STAT(mib_counters.excessive_collision) },
3094 { "multicast_frames_sent", MV643XX_STAT(mib_counters.multicast_frames_sent) },
3095 { "broadcast_frames_sent", MV643XX_STAT(mib_counters.broadcast_frames_sent) },
3096 { "unrec_mac_control_received", MV643XX_STAT(mib_counters.unrec_mac_control_received) },
3097 { "fc_sent", MV643XX_STAT(mib_counters.fc_sent) },
3098 { "good_fc_received", MV643XX_STAT(mib_counters.good_fc_received) },
3099 { "bad_fc_received", MV643XX_STAT(mib_counters.bad_fc_received) },
3100 { "undersize_received", MV643XX_STAT(mib_counters.undersize_received) },
3101 { "fragments_received", MV643XX_STAT(mib_counters.fragments_received) },
3102 { "oversize_received", MV643XX_STAT(mib_counters.oversize_received) },
3103 { "jabber_received", MV643XX_STAT(mib_counters.jabber_received) },
3104 { "mac_receive_error", MV643XX_STAT(mib_counters.mac_receive_error) },
3105 { "bad_crc_event", MV643XX_STAT(mib_counters.bad_crc_event) },
3106 { "collision", MV643XX_STAT(mib_counters.collision) },
3107 { "late_collision", MV643XX_STAT(mib_counters.late_collision) },
3110 #define MV643XX_STATS_LEN \
3111 sizeof(mv643xx_gstrings_stats) / sizeof(struct mv643xx_stats)
3113 static void mv643xx_get_drvinfo(struct net_device *netdev,
3114 struct ethtool_drvinfo *drvinfo)
3116 strncpy(drvinfo->driver, mv643xx_driver_name, 32);
3117 strncpy(drvinfo->version, mv643xx_driver_version, 32);
3118 strncpy(drvinfo->fw_version, "N/A", 32);
3119 strncpy(drvinfo->bus_info, "mv643xx", 32);
3120 drvinfo->n_stats = MV643XX_STATS_LEN;
3123 static int mv643xx_get_stats_count(struct net_device *netdev)
3125 return MV643XX_STATS_LEN;
3128 static void mv643xx_get_ethtool_stats(struct net_device *netdev,
3129 struct ethtool_stats *stats, uint64_t *data)
3131 struct mv643xx_private *mp = netdev->priv;
3134 eth_update_mib_counters(mp);
3136 for (i = 0; i < MV643XX_STATS_LEN; i++) {
3137 char *p = (char *)mp+mv643xx_gstrings_stats[i].stat_offset;
3138 data[i] = (mv643xx_gstrings_stats[i].sizeof_stat ==
3139 sizeof(uint64_t)) ? *(uint64_t *)p : *(uint32_t *)p;
3143 static void mv643xx_get_strings(struct net_device *netdev, uint32_t stringset,
3150 for (i=0; i < MV643XX_STATS_LEN; i++) {
3151 memcpy(data + i * ETH_GSTRING_LEN,
3152 mv643xx_gstrings_stats[i].stat_string,
3159 static u32 mv643xx_eth_get_link(struct net_device *dev)
3161 struct mv643xx_private *mp = netdev_priv(dev);
3163 return mii_link_ok(&mp->mii);
3166 static int mv643xx_eth_nway_restart(struct net_device *dev)
3168 struct mv643xx_private *mp = netdev_priv(dev);
3170 return mii_nway_restart(&mp->mii);
3173 static int mv643xx_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
3175 struct mv643xx_private *mp = netdev_priv(dev);
3177 return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL);
3180 static struct ethtool_ops mv643xx_ethtool_ops = {
3181 .get_settings = mv643xx_get_settings,
3182 .set_settings = mv643xx_set_settings,
3183 .get_drvinfo = mv643xx_get_drvinfo,
3184 .get_link = mv643xx_eth_get_link,
3185 .get_sg = ethtool_op_get_sg,
3186 .set_sg = ethtool_op_set_sg,
3187 .get_strings = mv643xx_get_strings,
3188 .get_stats_count = mv643xx_get_stats_count,
3189 .get_ethtool_stats = mv643xx_get_ethtool_stats,
3190 .get_strings = mv643xx_get_strings,
3191 .get_stats_count = mv643xx_get_stats_count,
3192 .get_ethtool_stats = mv643xx_get_ethtool_stats,
3193 .nway_reset = mv643xx_eth_nway_restart,
3196 /************* End ethtool support *************************/