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>
35 #include <linux/tcp.h>
36 #include <linux/udp.h>
37 #include <linux/etherdevice.h>
41 #include <linux/bitops.h>
42 #include <linux/delay.h>
43 #include <linux/ethtool.h>
44 #include <linux/platform_device.h>
47 #include <asm/types.h>
48 #include <asm/pgtable.h>
49 #include <asm/system.h>
50 #include <asm/delay.h>
51 #include "mv643xx_eth.h"
54 * The first part is the high level driver of the gigE ethernet ports.
60 #define DMA_ALIGN 8 /* hw requires 8-byte alignment */
61 #define HW_IP_ALIGN 2 /* hw aligns IP header */
62 #define WRAP HW_IP_ALIGN + ETH_HLEN + VLAN_HLEN + FCS_LEN
63 #define RX_SKB_SIZE ((dev->mtu + WRAP + 7) & ~0x7)
65 #define INT_UNMASK_ALL 0x0007ffff
66 #define INT_UNMASK_ALL_EXT 0x0011ffff
67 #define INT_MASK_ALL 0x00000000
68 #define INT_MASK_ALL_EXT 0x00000000
69 #define INT_CAUSE_CHECK_BITS INT_CAUSE_UNMASK_ALL
70 #define INT_CAUSE_CHECK_BITS_EXT INT_CAUSE_UNMASK_ALL_EXT
72 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
73 #define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1)
75 #define MAX_DESCS_PER_SKB 1
78 #define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */
79 #define PHY_WAIT_MICRO_SECONDS 10
81 /* Static function declarations */
82 static int eth_port_link_is_up(unsigned int eth_port_num
);
83 static void eth_port_uc_addr_get(struct net_device
*dev
,
84 unsigned char *MacAddr
);
85 static void eth_port_set_multicast_list(struct net_device
*);
86 static int mv643xx_eth_open(struct net_device
*);
87 static int mv643xx_eth_stop(struct net_device
*);
88 static int mv643xx_eth_change_mtu(struct net_device
*, int);
89 static struct net_device_stats
*mv643xx_eth_get_stats(struct net_device
*);
90 static void eth_port_init_mac_tables(unsigned int eth_port_num
);
92 static int mv643xx_poll(struct net_device
*dev
, int *budget
);
94 static void ethernet_phy_set(unsigned int eth_port_num
, int phy_addr
);
95 static int ethernet_phy_detect(unsigned int eth_port_num
);
96 static struct ethtool_ops mv643xx_ethtool_ops
;
98 static char mv643xx_driver_name
[] = "mv643xx_eth";
99 static char mv643xx_driver_version
[] = "1.0";
101 static void __iomem
*mv643xx_eth_shared_base
;
103 /* used to protect MV643XX_ETH_SMI_REG, which is shared across ports */
104 static DEFINE_SPINLOCK(mv643xx_eth_phy_lock
);
106 static inline u32
mv_read(int offset
)
108 void __iomem
*reg_base
;
110 reg_base
= mv643xx_eth_shared_base
- MV643XX_ETH_SHARED_REGS
;
112 return readl(reg_base
+ offset
);
115 static inline void mv_write(int offset
, u32 data
)
117 void __iomem
*reg_base
;
119 reg_base
= mv643xx_eth_shared_base
- MV643XX_ETH_SHARED_REGS
;
120 writel(data
, reg_base
+ offset
);
124 * Changes MTU (maximum transfer unit) of the gigabit ethenret port
126 * Input : pointer to ethernet interface network device structure
128 * Output : 0 upon success, -EINVAL upon failure
130 static int mv643xx_eth_change_mtu(struct net_device
*dev
, int new_mtu
)
132 if ((new_mtu
> 9500) || (new_mtu
< 64))
137 * Stop then re-open the interface. This will allocate RX skb's with
139 * There is a possible danger that the open will not successed, due
140 * to memory is full, which might fail the open function.
142 if (netif_running(dev
)) {
143 mv643xx_eth_stop(dev
);
144 if (mv643xx_eth_open(dev
))
146 "%s: Fatal error on opening device\n",
154 * mv643xx_eth_rx_task
156 * Fills / refills RX queue on a certain gigabit ethernet port
158 * Input : pointer to ethernet interface network device structure
161 static void mv643xx_eth_rx_task(void *data
)
163 struct net_device
*dev
= (struct net_device
*)data
;
164 struct mv643xx_private
*mp
= netdev_priv(dev
);
165 struct pkt_info pkt_info
;
169 if (test_and_set_bit(0, &mp
->rx_task_busy
))
170 panic("%s: Error in test_set_bit / clear_bit", dev
->name
);
172 while (mp
->rx_ring_skbs
< (mp
->rx_ring_size
- 5)) {
173 skb
= dev_alloc_skb(RX_SKB_SIZE
+ DMA_ALIGN
);
177 unaligned
= (u32
)skb
->data
& (DMA_ALIGN
- 1);
179 skb_reserve(skb
, DMA_ALIGN
- unaligned
);
180 pkt_info
.cmd_sts
= ETH_RX_ENABLE_INTERRUPT
;
181 pkt_info
.byte_cnt
= RX_SKB_SIZE
;
182 pkt_info
.buf_ptr
= dma_map_single(NULL
, skb
->data
, RX_SKB_SIZE
,
184 pkt_info
.return_info
= skb
;
185 if (eth_rx_return_buff(mp
, &pkt_info
) != ETH_OK
) {
187 "%s: Error allocating RX Ring\n", dev
->name
);
190 skb_reserve(skb
, HW_IP_ALIGN
);
192 clear_bit(0, &mp
->rx_task_busy
);
194 * If RX ring is empty of SKB, set a timer to try allocating
195 * again in a later time .
197 if ((mp
->rx_ring_skbs
== 0) && (mp
->rx_timer_flag
== 0)) {
198 printk(KERN_INFO
"%s: Rx ring is empty\n", dev
->name
);
200 mp
->timeout
.expires
= jiffies
+ (HZ
/ 10);
201 add_timer(&mp
->timeout
);
202 mp
->rx_timer_flag
= 1;
204 #ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
206 /* Return interrupts */
207 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(mp
->port_num
),
214 * mv643xx_eth_rx_task_timer_wrapper
216 * Timer routine to wake up RX queue filling task. This function is
217 * used only in case the RX queue is empty, and all alloc_skb has
218 * failed (due to out of memory event).
220 * Input : pointer to ethernet interface network device structure
223 static void mv643xx_eth_rx_task_timer_wrapper(unsigned long data
)
225 struct net_device
*dev
= (struct net_device
*)data
;
226 struct mv643xx_private
*mp
= netdev_priv(dev
);
228 mp
->rx_timer_flag
= 0;
229 mv643xx_eth_rx_task((void *)data
);
233 * mv643xx_eth_update_mac_address
235 * Update the MAC address of the port in the address table
237 * Input : pointer to ethernet interface network device structure
240 static void mv643xx_eth_update_mac_address(struct net_device
*dev
)
242 struct mv643xx_private
*mp
= netdev_priv(dev
);
243 unsigned int port_num
= mp
->port_num
;
245 eth_port_init_mac_tables(port_num
);
246 memcpy(mp
->port_mac_addr
, dev
->dev_addr
, 6);
247 eth_port_uc_addr_set(port_num
, mp
->port_mac_addr
);
251 * mv643xx_eth_set_rx_mode
253 * Change from promiscuos to regular rx mode
255 * Input : pointer to ethernet interface network device structure
258 static void mv643xx_eth_set_rx_mode(struct net_device
*dev
)
260 struct mv643xx_private
*mp
= netdev_priv(dev
);
262 if (dev
->flags
& IFF_PROMISC
)
263 mp
->port_config
|= (u32
) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE
;
265 mp
->port_config
&= ~(u32
) MV643XX_ETH_UNICAST_PROMISCUOUS_MODE
;
267 mv_write(MV643XX_ETH_PORT_CONFIG_REG(mp
->port_num
), mp
->port_config
);
269 eth_port_set_multicast_list(dev
);
273 * mv643xx_eth_set_mac_address
275 * Change the interface's mac address.
276 * No special hardware thing should be done because interface is always
277 * put in promiscuous mode.
279 * Input : pointer to ethernet interface network device structure and
280 * a pointer to the designated entry to be added to the cache.
281 * Output : zero upon success, negative upon failure
283 static int mv643xx_eth_set_mac_address(struct net_device
*dev
, void *addr
)
287 for (i
= 0; i
< 6; i
++)
288 /* +2 is for the offset of the HW addr type */
289 dev
->dev_addr
[i
] = ((unsigned char *)addr
)[i
+ 2];
290 mv643xx_eth_update_mac_address(dev
);
295 * mv643xx_eth_tx_timeout
297 * Called upon a timeout on transmitting a packet
299 * Input : pointer to ethernet interface network device structure.
302 static void mv643xx_eth_tx_timeout(struct net_device
*dev
)
304 struct mv643xx_private
*mp
= netdev_priv(dev
);
306 printk(KERN_INFO
"%s: TX timeout ", dev
->name
);
308 /* Do the reset outside of interrupt context */
309 schedule_work(&mp
->tx_timeout_task
);
313 * mv643xx_eth_tx_timeout_task
315 * Actual routine to reset the adapter when a timeout on Tx has occurred
317 static void mv643xx_eth_tx_timeout_task(struct net_device
*dev
)
319 struct mv643xx_private
*mp
= netdev_priv(dev
);
321 netif_device_detach(dev
);
322 eth_port_reset(mp
->port_num
);
324 netif_device_attach(dev
);
328 * mv643xx_eth_free_tx_queue
330 * Input : dev - a pointer to the required interface
332 * Output : 0 if was able to release skb , nonzero otherwise
334 static int mv643xx_eth_free_tx_queue(struct net_device
*dev
,
335 unsigned int eth_int_cause_ext
)
337 struct mv643xx_private
*mp
= netdev_priv(dev
);
338 struct net_device_stats
*stats
= &mp
->stats
;
339 struct pkt_info pkt_info
;
342 if (!(eth_int_cause_ext
& (BIT0
| BIT8
)))
345 /* Check only queue 0 */
346 while (eth_tx_return_desc(mp
, &pkt_info
) == ETH_OK
) {
347 if (pkt_info
.cmd_sts
& BIT0
) {
348 printk("%s: Error in TX\n", dev
->name
);
352 if (pkt_info
.cmd_sts
& ETH_TX_FIRST_DESC
)
353 dma_unmap_single(NULL
, pkt_info
.buf_ptr
,
357 dma_unmap_page(NULL
, pkt_info
.buf_ptr
,
361 if (pkt_info
.return_info
) {
362 dev_kfree_skb_irq(pkt_info
.return_info
);
371 * mv643xx_eth_receive
373 * This function is forward packets that are received from the port's
374 * queues toward kernel core or FastRoute them to another interface.
376 * Input : dev - a pointer to the required interface
377 * max - maximum number to receive (0 means unlimted)
379 * Output : number of served packets
382 static int mv643xx_eth_receive_queue(struct net_device
*dev
, int budget
)
384 static int mv643xx_eth_receive_queue(struct net_device
*dev
)
387 struct mv643xx_private
*mp
= netdev_priv(dev
);
388 struct net_device_stats
*stats
= &mp
->stats
;
389 unsigned int received_packets
= 0;
391 struct pkt_info pkt_info
;
394 while (budget
-- > 0 && eth_port_receive(mp
, &pkt_info
) == ETH_OK
) {
396 while (eth_port_receive(mp
, &pkt_info
) == ETH_OK
) {
401 /* Update statistics. Note byte count includes 4 byte CRC count */
403 stats
->rx_bytes
+= pkt_info
.byte_cnt
;
404 skb
= pkt_info
.return_info
;
406 * In case received a packet without first / last bits on OR
407 * the error summary bit is on, the packets needs to be dropeed.
409 if (((pkt_info
.cmd_sts
410 & (ETH_RX_FIRST_DESC
| ETH_RX_LAST_DESC
)) !=
411 (ETH_RX_FIRST_DESC
| ETH_RX_LAST_DESC
))
412 || (pkt_info
.cmd_sts
& ETH_ERROR_SUMMARY
)) {
414 if ((pkt_info
.cmd_sts
& (ETH_RX_FIRST_DESC
|
415 ETH_RX_LAST_DESC
)) !=
416 (ETH_RX_FIRST_DESC
| ETH_RX_LAST_DESC
)) {
419 "%s: Received packet spread "
420 "on multiple descriptors\n",
423 if (pkt_info
.cmd_sts
& ETH_ERROR_SUMMARY
)
426 dev_kfree_skb_irq(skb
);
429 * The -4 is for the CRC in the trailer of the
432 skb_put(skb
, pkt_info
.byte_cnt
- 4);
435 if (pkt_info
.cmd_sts
& ETH_LAYER_4_CHECKSUM_OK
) {
436 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
438 (pkt_info
.cmd_sts
& 0x0007fff8) >> 3);
440 skb
->protocol
= eth_type_trans(skb
, dev
);
442 netif_receive_skb(skb
);
449 return received_packets
;
453 * mv643xx_eth_int_handler
455 * Main interrupt handler for the gigbit ethernet ports
457 * Input : irq - irq number (not used)
458 * dev_id - a pointer to the required interface's data structure
463 static irqreturn_t
mv643xx_eth_int_handler(int irq
, void *dev_id
,
464 struct pt_regs
*regs
)
466 struct net_device
*dev
= (struct net_device
*)dev_id
;
467 struct mv643xx_private
*mp
= netdev_priv(dev
);
468 u32 eth_int_cause
, eth_int_cause_ext
= 0;
469 unsigned int port_num
= mp
->port_num
;
471 /* Read interrupt cause registers */
472 eth_int_cause
= mv_read(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num
)) &
475 if (eth_int_cause
& BIT1
)
476 eth_int_cause_ext
= mv_read(
477 MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num
)) &
481 if (!(eth_int_cause
& 0x0007fffd)) {
482 /* Dont ack the Rx interrupt */
485 * Clear specific ethernet port intrerrupt registers by
486 * acknowleding relevant bits.
488 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num
),
490 if (eth_int_cause_ext
!= 0x0)
491 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG
492 (port_num
), ~eth_int_cause_ext
);
494 /* UDP change : We may need this */
495 if ((eth_int_cause_ext
& 0x0000ffff) &&
496 (mv643xx_eth_free_tx_queue(dev
, eth_int_cause_ext
) == 0) &&
497 (mp
->tx_ring_size
> mp
->tx_ring_skbs
+ MAX_DESCS_PER_SKB
))
498 netif_wake_queue(dev
);
501 if (netif_rx_schedule_prep(dev
)) {
502 /* Mask all the interrupts */
503 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
),
505 /* wait for previous write to complete */
506 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
));
507 __netif_rx_schedule(dev
);
510 if (eth_int_cause
& (BIT2
| BIT11
))
511 mv643xx_eth_receive_queue(dev
, 0);
514 * After forwarded received packets to upper layer, add a task
515 * in an interrupts enabled context that refills the RX ring
518 #ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
519 /* Mask all interrupts on ethernet port */
520 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
),
522 /* wait for previous write to take effect */
523 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
));
525 queue_task(&mp
->rx_task
, &tq_immediate
);
526 mark_bh(IMMEDIATE_BH
);
528 mp
->rx_task
.func(dev
);
532 /* PHY status changed */
533 if (eth_int_cause_ext
& (BIT16
| BIT20
)) {
534 if (eth_port_link_is_up(port_num
)) {
535 netif_carrier_on(dev
);
536 netif_wake_queue(dev
);
538 mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG
541 netif_carrier_off(dev
);
542 netif_stop_queue(dev
);
547 * If no real interrupt occured, exit.
548 * This can happen when using gigE interrupt coalescing mechanism.
550 if ((eth_int_cause
== 0x0) && (eth_int_cause_ext
== 0x0))
559 * eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path
562 * This routine sets the RX coalescing interrupt mechanism parameter.
563 * This parameter is a timeout counter, that counts in 64 t_clk
564 * chunks ; that when timeout event occurs a maskable interrupt
566 * The parameter is calculated using the tClk of the MV-643xx chip
567 * , and the required delay of the interrupt in usec.
570 * unsigned int eth_port_num Ethernet port number
571 * unsigned int t_clk t_clk of the MV-643xx chip in HZ units
572 * unsigned int delay Delay in usec
575 * Interrupt coalescing mechanism value is set in MV-643xx chip.
578 * The interrupt coalescing value set in the gigE port.
581 static unsigned int eth_port_set_rx_coal(unsigned int eth_port_num
,
582 unsigned int t_clk
, unsigned int delay
)
584 unsigned int coal
= ((t_clk
/ 1000000) * delay
) / 64;
586 /* Set RX Coalescing mechanism */
587 mv_write(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num
),
588 ((coal
& 0x3fff) << 8) |
589 (mv_read(MV643XX_ETH_SDMA_CONFIG_REG(eth_port_num
))
597 * eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path
600 * This routine sets the TX coalescing interrupt mechanism parameter.
601 * This parameter is a timeout counter, that counts in 64 t_clk
602 * chunks ; that when timeout event occurs a maskable interrupt
604 * The parameter is calculated using the t_cLK frequency of the
605 * MV-643xx chip and the required delay in the interrupt in uSec
608 * unsigned int eth_port_num Ethernet port number
609 * unsigned int t_clk t_clk of the MV-643xx chip in HZ units
610 * unsigned int delay Delay in uSeconds
613 * Interrupt coalescing mechanism value is set in MV-643xx chip.
616 * The interrupt coalescing value set in the gigE port.
619 static unsigned int eth_port_set_tx_coal(unsigned int eth_port_num
,
620 unsigned int t_clk
, unsigned int delay
)
623 coal
= ((t_clk
/ 1000000) * delay
) / 64;
624 /* Set TX Coalescing mechanism */
625 mv_write(MV643XX_ETH_TX_FIFO_URGENT_THRESHOLD_REG(eth_port_num
),
631 * ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
634 * This function prepares a Rx chained list of descriptors and packet
635 * buffers in a form of a ring. The routine must be called after port
636 * initialization routine and before port start routine.
637 * The Ethernet SDMA engine uses CPU bus addresses to access the various
638 * devices in the system (i.e. DRAM). This function uses the ethernet
639 * struct 'virtual to physical' routine (set by the user) to set the ring
640 * with physical addresses.
643 * struct mv643xx_private *mp Ethernet Port Control srtuct.
646 * The routine updates the Ethernet port control struct with information
647 * regarding the Rx descriptors and buffers.
652 static void ether_init_rx_desc_ring(struct mv643xx_private
*mp
)
654 volatile struct eth_rx_desc
*p_rx_desc
;
655 int rx_desc_num
= mp
->rx_ring_size
;
658 /* initialize the next_desc_ptr links in the Rx descriptors ring */
659 p_rx_desc
= (struct eth_rx_desc
*)mp
->p_rx_desc_area
;
660 for (i
= 0; i
< rx_desc_num
; i
++) {
661 p_rx_desc
[i
].next_desc_ptr
= mp
->rx_desc_dma
+
662 ((i
+ 1) % rx_desc_num
) * sizeof(struct eth_rx_desc
);
665 /* Save Rx desc pointer to driver struct. */
666 mp
->rx_curr_desc_q
= 0;
667 mp
->rx_used_desc_q
= 0;
669 mp
->rx_desc_area_size
= rx_desc_num
* sizeof(struct eth_rx_desc
);
671 /* Add the queue to the list of RX queues of this port */
672 mp
->port_rx_queue_command
|= 1;
676 * ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory.
679 * This function prepares a Tx chained list of descriptors and packet
680 * buffers in a form of a ring. The routine must be called after port
681 * initialization routine and before port start routine.
682 * The Ethernet SDMA engine uses CPU bus addresses to access the various
683 * devices in the system (i.e. DRAM). This function uses the ethernet
684 * struct 'virtual to physical' routine (set by the user) to set the ring
685 * with physical addresses.
688 * struct mv643xx_private *mp Ethernet Port Control srtuct.
691 * The routine updates the Ethernet port control struct with information
692 * regarding the Tx descriptors and buffers.
697 static void ether_init_tx_desc_ring(struct mv643xx_private
*mp
)
699 int tx_desc_num
= mp
->tx_ring_size
;
700 struct eth_tx_desc
*p_tx_desc
;
703 /* Initialize the next_desc_ptr links in the Tx descriptors ring */
704 p_tx_desc
= (struct eth_tx_desc
*)mp
->p_tx_desc_area
;
705 for (i
= 0; i
< tx_desc_num
; i
++) {
706 p_tx_desc
[i
].next_desc_ptr
= mp
->tx_desc_dma
+
707 ((i
+ 1) % tx_desc_num
) * sizeof(struct eth_tx_desc
);
710 mp
->tx_curr_desc_q
= 0;
711 mp
->tx_used_desc_q
= 0;
712 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
713 mp
->tx_first_desc_q
= 0;
716 mp
->tx_desc_area_size
= tx_desc_num
* sizeof(struct eth_tx_desc
);
718 /* Add the queue to the list of Tx queues of this port */
719 mp
->port_tx_queue_command
|= 1;
725 * This function is called when openning the network device. The function
726 * should initialize all the hardware, initialize cyclic Rx/Tx
727 * descriptors chain and buffers and allocate an IRQ to the network
730 * Input : a pointer to the network device structure
732 * Output : zero of success , nonzero if fails.
735 static int mv643xx_eth_open(struct net_device
*dev
)
737 struct mv643xx_private
*mp
= netdev_priv(dev
);
738 unsigned int port_num
= mp
->port_num
;
742 err
= request_irq(dev
->irq
, mv643xx_eth_int_handler
,
743 SA_SHIRQ
| SA_SAMPLE_RANDOM
, dev
->name
, dev
);
745 printk(KERN_ERR
"Can not assign IRQ number to MV643XX_eth%d\n",
751 mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num
), 0x0000ff00);
753 /* Set the MAC Address */
754 memcpy(mp
->port_mac_addr
, dev
->dev_addr
, 6);
758 INIT_WORK(&mp
->rx_task
, (void (*)(void *))mv643xx_eth_rx_task
, dev
);
760 memset(&mp
->timeout
, 0, sizeof(struct timer_list
));
761 mp
->timeout
.function
= mv643xx_eth_rx_task_timer_wrapper
;
762 mp
->timeout
.data
= (unsigned long)dev
;
764 mp
->rx_task_busy
= 0;
765 mp
->rx_timer_flag
= 0;
767 /* Allocate RX and TX skb rings */
768 mp
->rx_skb
= kmalloc(sizeof(*mp
->rx_skb
) * mp
->rx_ring_size
,
771 printk(KERN_ERR
"%s: Cannot allocate Rx skb ring\n", dev
->name
);
775 mp
->tx_skb
= kmalloc(sizeof(*mp
->tx_skb
) * mp
->tx_ring_size
,
778 printk(KERN_ERR
"%s: Cannot allocate Tx skb ring\n", dev
->name
);
780 goto out_free_rx_skb
;
783 /* Allocate TX ring */
784 mp
->tx_ring_skbs
= 0;
785 size
= mp
->tx_ring_size
* sizeof(struct eth_tx_desc
);
786 mp
->tx_desc_area_size
= size
;
788 if (mp
->tx_sram_size
) {
789 mp
->p_tx_desc_area
= ioremap(mp
->tx_sram_addr
,
791 mp
->tx_desc_dma
= mp
->tx_sram_addr
;
793 mp
->p_tx_desc_area
= dma_alloc_coherent(NULL
, size
,
797 if (!mp
->p_tx_desc_area
) {
798 printk(KERN_ERR
"%s: Cannot allocate Tx Ring (size %d bytes)\n",
801 goto out_free_tx_skb
;
803 BUG_ON((u32
) mp
->p_tx_desc_area
& 0xf); /* check 16-byte alignment */
804 memset((void *)mp
->p_tx_desc_area
, 0, mp
->tx_desc_area_size
);
806 ether_init_tx_desc_ring(mp
);
808 /* Allocate RX ring */
809 mp
->rx_ring_skbs
= 0;
810 size
= mp
->rx_ring_size
* sizeof(struct eth_rx_desc
);
811 mp
->rx_desc_area_size
= size
;
813 if (mp
->rx_sram_size
) {
814 mp
->p_rx_desc_area
= ioremap(mp
->rx_sram_addr
,
816 mp
->rx_desc_dma
= mp
->rx_sram_addr
;
818 mp
->p_rx_desc_area
= dma_alloc_coherent(NULL
, size
,
822 if (!mp
->p_rx_desc_area
) {
823 printk(KERN_ERR
"%s: Cannot allocate Rx ring (size %d bytes)\n",
825 printk(KERN_ERR
"%s: Freeing previously allocated TX queues...",
827 if (mp
->rx_sram_size
)
828 iounmap(mp
->p_tx_desc_area
);
830 dma_free_coherent(NULL
, mp
->tx_desc_area_size
,
831 mp
->p_tx_desc_area
, mp
->tx_desc_dma
);
833 goto out_free_tx_skb
;
835 memset((void *)mp
->p_rx_desc_area
, 0, size
);
837 ether_init_rx_desc_ring(mp
);
839 mv643xx_eth_rx_task(dev
); /* Fill RX ring with skb's */
843 /* Interrupt Coalescing */
847 eth_port_set_rx_coal(port_num
, 133000000, MV643XX_RX_COAL
);
851 eth_port_set_tx_coal(port_num
, 133000000, MV643XX_TX_COAL
);
853 /* Clear any pending ethernet port interrupts */
854 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num
), 0);
855 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num
), 0);
857 /* Unmask phy and link status changes interrupts */
858 mv_write(MV643XX_ETH_INTERRUPT_EXTEND_MASK_REG(port_num
),
861 /* Unmask RX buffer and TX end interrupt */
862 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
), INT_UNMASK_ALL
);
870 free_irq(dev
->irq
, dev
);
875 static void mv643xx_eth_free_tx_rings(struct net_device
*dev
)
877 struct mv643xx_private
*mp
= netdev_priv(dev
);
878 unsigned int port_num
= mp
->port_num
;
883 mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num
), 0x0000ff00);
885 /* Free outstanding skb's on TX rings */
886 for (curr
= 0; mp
->tx_ring_skbs
&& curr
< mp
->tx_ring_size
; curr
++) {
887 skb
= mp
->tx_skb
[curr
];
889 mp
->tx_ring_skbs
-= skb_shinfo(skb
)->nr_frags
;
894 if (mp
->tx_ring_skbs
)
895 printk("%s: Error on Tx descriptor free - could not free %d"
896 " descriptors\n", dev
->name
, mp
->tx_ring_skbs
);
899 if (mp
->tx_sram_size
)
900 iounmap(mp
->p_tx_desc_area
);
902 dma_free_coherent(NULL
, mp
->tx_desc_area_size
,
903 mp
->p_tx_desc_area
, mp
->tx_desc_dma
);
906 static void mv643xx_eth_free_rx_rings(struct net_device
*dev
)
908 struct mv643xx_private
*mp
= netdev_priv(dev
);
909 unsigned int port_num
= mp
->port_num
;
913 mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num
), 0x0000ff00);
915 /* Free preallocated skb's on RX rings */
916 for (curr
= 0; mp
->rx_ring_skbs
&& curr
< mp
->rx_ring_size
; curr
++) {
917 if (mp
->rx_skb
[curr
]) {
918 dev_kfree_skb(mp
->rx_skb
[curr
]);
923 if (mp
->rx_ring_skbs
)
925 "%s: Error in freeing Rx Ring. %d skb's still"
926 " stuck in RX Ring - ignoring them\n", dev
->name
,
929 if (mp
->rx_sram_size
)
930 iounmap(mp
->p_rx_desc_area
);
932 dma_free_coherent(NULL
, mp
->rx_desc_area_size
,
933 mp
->p_rx_desc_area
, mp
->rx_desc_dma
);
939 * This function is used when closing the network device.
940 * It updates the hardware,
941 * release all memory that holds buffers and descriptors and release the IRQ.
942 * Input : a pointer to the device structure
943 * Output : zero if success , nonzero if fails
946 static int mv643xx_eth_stop(struct net_device
*dev
)
948 struct mv643xx_private
*mp
= netdev_priv(dev
);
949 unsigned int port_num
= mp
->port_num
;
951 /* Mask all interrupts on ethernet port */
952 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
), INT_MASK_ALL
);
953 /* wait for previous write to complete */
954 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
));
957 netif_poll_disable(dev
);
959 netif_carrier_off(dev
);
960 netif_stop_queue(dev
);
962 eth_port_reset(mp
->port_num
);
964 mv643xx_eth_free_tx_rings(dev
);
965 mv643xx_eth_free_rx_rings(dev
);
968 netif_poll_enable(dev
);
971 free_irq(dev
->irq
, dev
);
977 static void mv643xx_tx(struct net_device
*dev
)
979 struct mv643xx_private
*mp
= netdev_priv(dev
);
980 struct pkt_info pkt_info
;
982 while (eth_tx_return_desc(mp
, &pkt_info
) == ETH_OK
) {
983 if (pkt_info
.cmd_sts
& ETH_TX_FIRST_DESC
)
984 dma_unmap_single(NULL
, pkt_info
.buf_ptr
,
988 dma_unmap_page(NULL
, pkt_info
.buf_ptr
,
992 if (pkt_info
.return_info
)
993 dev_kfree_skb_irq(pkt_info
.return_info
);
996 if (netif_queue_stopped(dev
) &&
997 mp
->tx_ring_size
> mp
->tx_ring_skbs
+ MAX_DESCS_PER_SKB
)
998 netif_wake_queue(dev
);
1004 * This function is used in case of NAPI
1006 static int mv643xx_poll(struct net_device
*dev
, int *budget
)
1008 struct mv643xx_private
*mp
= netdev_priv(dev
);
1009 int done
= 1, orig_budget
, work_done
;
1010 unsigned int port_num
= mp
->port_num
;
1012 #ifdef MV643XX_TX_FAST_REFILL
1013 if (++mp
->tx_clean_threshold
> 5) {
1015 mp
->tx_clean_threshold
= 0;
1019 if ((mv_read(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num
)))
1020 != (u32
) mp
->rx_used_desc_q
) {
1021 orig_budget
= *budget
;
1022 if (orig_budget
> dev
->quota
)
1023 orig_budget
= dev
->quota
;
1024 work_done
= mv643xx_eth_receive_queue(dev
, orig_budget
);
1025 mp
->rx_task
.func(dev
);
1026 *budget
-= work_done
;
1027 dev
->quota
-= work_done
;
1028 if (work_done
>= orig_budget
)
1033 netif_rx_complete(dev
);
1034 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num
), 0);
1035 mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num
), 0);
1036 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
),
1040 return done
? 0 : 1;
1044 /* Hardware can't handle unaligned fragments smaller than 9 bytes.
1045 * This helper function detects that case.
1048 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff
*skb
)
1053 for (frag
= 0; frag
< skb_shinfo(skb
)->nr_frags
; frag
++) {
1054 fragp
= &skb_shinfo(skb
)->frags
[frag
];
1055 if (fragp
->size
<= 8 && fragp
->page_offset
& 0x7)
1064 * mv643xx_eth_start_xmit
1066 * This function is queues a packet in the Tx descriptor for
1069 * Input : skb - a pointer to socket buffer
1070 * dev - a pointer to the required port
1072 * Output : zero upon success
1074 static int mv643xx_eth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1076 struct mv643xx_private
*mp
= netdev_priv(dev
);
1077 struct net_device_stats
*stats
= &mp
->stats
;
1078 ETH_FUNC_RET_STATUS status
;
1079 unsigned long flags
;
1080 struct pkt_info pkt_info
;
1082 if (netif_queue_stopped(dev
)) {
1084 "%s: Tried sending packet when interface is stopped\n",
1089 /* This is a hard error, log it. */
1090 if ((mp
->tx_ring_size
- mp
->tx_ring_skbs
) <=
1091 (skb_shinfo(skb
)->nr_frags
+ 1)) {
1092 netif_stop_queue(dev
);
1094 "%s: Bug in mv643xx_eth - Trying to transmit when"
1095 " queue full !\n", dev
->name
);
1099 /* Paranoid check - this shouldn't happen */
1101 stats
->tx_dropped
++;
1102 printk(KERN_ERR
"mv64320_eth paranoid check failed\n");
1106 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
1107 if (has_tiny_unaligned_frags(skb
)) {
1108 if ((skb_linearize(skb
, GFP_ATOMIC
) != 0)) {
1109 stats
->tx_dropped
++;
1110 printk(KERN_DEBUG
"%s: failed to linearize tiny "
1111 "unaligned fragment\n", dev
->name
);
1116 spin_lock_irqsave(&mp
->lock
, flags
);
1118 if (!skb_shinfo(skb
)->nr_frags
) {
1119 if (skb
->ip_summed
!= CHECKSUM_HW
) {
1120 /* Errata BTS #50, IHL must be 5 if no HW checksum */
1121 pkt_info
.cmd_sts
= ETH_TX_ENABLE_INTERRUPT
|
1124 5 << ETH_TX_IHL_SHIFT
;
1125 pkt_info
.l4i_chk
= 0;
1127 pkt_info
.cmd_sts
= ETH_TX_ENABLE_INTERRUPT
|
1130 ETH_GEN_TCP_UDP_CHECKSUM
|
1131 ETH_GEN_IP_V_4_CHECKSUM
|
1132 skb
->nh
.iph
->ihl
<< ETH_TX_IHL_SHIFT
;
1133 /* CPU already calculated pseudo header checksum. */
1134 if ((skb
->protocol
== ETH_P_IP
) &&
1135 (skb
->nh
.iph
->protocol
== IPPROTO_UDP
) ) {
1136 pkt_info
.cmd_sts
|= ETH_UDP_FRAME
;
1137 pkt_info
.l4i_chk
= skb
->h
.uh
->check
;
1138 } else if ((skb
->protocol
== ETH_P_IP
) &&
1139 (skb
->nh
.iph
->protocol
== IPPROTO_TCP
))
1140 pkt_info
.l4i_chk
= skb
->h
.th
->check
;
1143 "%s: chksum proto != IPv4 TCP or UDP\n",
1145 spin_unlock_irqrestore(&mp
->lock
, flags
);
1149 pkt_info
.byte_cnt
= skb
->len
;
1150 pkt_info
.buf_ptr
= dma_map_single(NULL
, skb
->data
, skb
->len
,
1152 pkt_info
.return_info
= skb
;
1153 status
= eth_port_send(mp
, &pkt_info
);
1154 if ((status
== ETH_ERROR
) || (status
== ETH_QUEUE_FULL
))
1155 printk(KERN_ERR
"%s: Error on transmitting packet\n",
1157 stats
->tx_bytes
+= pkt_info
.byte_cnt
;
1161 /* first frag which is skb header */
1162 pkt_info
.byte_cnt
= skb_headlen(skb
);
1163 pkt_info
.buf_ptr
= dma_map_single(NULL
, skb
->data
,
1166 pkt_info
.l4i_chk
= 0;
1167 pkt_info
.return_info
= 0;
1169 if (skb
->ip_summed
!= CHECKSUM_HW
)
1170 /* Errata BTS #50, IHL must be 5 if no HW checksum */
1171 pkt_info
.cmd_sts
= ETH_TX_FIRST_DESC
|
1172 5 << ETH_TX_IHL_SHIFT
;
1174 pkt_info
.cmd_sts
= ETH_TX_FIRST_DESC
|
1175 ETH_GEN_TCP_UDP_CHECKSUM
|
1176 ETH_GEN_IP_V_4_CHECKSUM
|
1177 skb
->nh
.iph
->ihl
<< ETH_TX_IHL_SHIFT
;
1178 /* CPU already calculated pseudo header checksum. */
1179 if ((skb
->protocol
== ETH_P_IP
) &&
1180 (skb
->nh
.iph
->protocol
== IPPROTO_UDP
)) {
1181 pkt_info
.cmd_sts
|= ETH_UDP_FRAME
;
1182 pkt_info
.l4i_chk
= skb
->h
.uh
->check
;
1183 } else if ((skb
->protocol
== ETH_P_IP
) &&
1184 (skb
->nh
.iph
->protocol
== IPPROTO_TCP
))
1185 pkt_info
.l4i_chk
= skb
->h
.th
->check
;
1188 "%s: chksum proto != IPv4 TCP or UDP\n",
1190 spin_unlock_irqrestore(&mp
->lock
, flags
);
1195 status
= eth_port_send(mp
, &pkt_info
);
1196 if (status
!= ETH_OK
) {
1197 if ((status
== ETH_ERROR
))
1199 "%s: Error on transmitting packet\n",
1201 if (status
== ETH_QUEUE_FULL
)
1202 printk("Error on Queue Full \n");
1203 if (status
== ETH_QUEUE_LAST_RESOURCE
)
1204 printk("Tx resource error \n");
1206 stats
->tx_bytes
+= pkt_info
.byte_cnt
;
1208 /* Check for the remaining frags */
1209 for (frag
= 0; frag
< skb_shinfo(skb
)->nr_frags
; frag
++) {
1210 skb_frag_t
*this_frag
= &skb_shinfo(skb
)->frags
[frag
];
1211 pkt_info
.l4i_chk
= 0x0000;
1212 pkt_info
.cmd_sts
= 0x00000000;
1214 /* Last Frag enables interrupt and frees the skb */
1215 if (frag
== (skb_shinfo(skb
)->nr_frags
- 1)) {
1216 pkt_info
.cmd_sts
|= ETH_TX_ENABLE_INTERRUPT
|
1218 pkt_info
.return_info
= skb
;
1220 pkt_info
.return_info
= 0;
1222 pkt_info
.l4i_chk
= 0;
1223 pkt_info
.byte_cnt
= this_frag
->size
;
1225 pkt_info
.buf_ptr
= dma_map_page(NULL
, this_frag
->page
,
1226 this_frag
->page_offset
,
1230 status
= eth_port_send(mp
, &pkt_info
);
1232 if (status
!= ETH_OK
) {
1233 if ((status
== ETH_ERROR
))
1234 printk(KERN_ERR
"%s: Error on "
1235 "transmitting packet\n",
1238 if (status
== ETH_QUEUE_LAST_RESOURCE
)
1239 printk("Tx resource error \n");
1241 if (status
== ETH_QUEUE_FULL
)
1242 printk("Queue is full \n");
1244 stats
->tx_bytes
+= pkt_info
.byte_cnt
;
1248 spin_lock_irqsave(&mp
->lock
, flags
);
1250 pkt_info
.cmd_sts
= ETH_TX_ENABLE_INTERRUPT
| ETH_TX_FIRST_DESC
|
1252 pkt_info
.l4i_chk
= 0;
1253 pkt_info
.byte_cnt
= skb
->len
;
1254 pkt_info
.buf_ptr
= dma_map_single(NULL
, skb
->data
, skb
->len
,
1256 pkt_info
.return_info
= skb
;
1257 status
= eth_port_send(mp
, &pkt_info
);
1258 if ((status
== ETH_ERROR
) || (status
== ETH_QUEUE_FULL
))
1259 printk(KERN_ERR
"%s: Error on transmitting packet\n",
1261 stats
->tx_bytes
+= pkt_info
.byte_cnt
;
1264 /* Check if TX queue can handle another skb. If not, then
1265 * signal higher layers to stop requesting TX
1267 if (mp
->tx_ring_size
<= (mp
->tx_ring_skbs
+ MAX_DESCS_PER_SKB
))
1269 * Stop getting skb's from upper layers.
1270 * Getting skb's from upper layers will be enabled again after
1271 * packets are released.
1273 netif_stop_queue(dev
);
1275 /* Update statistics and start of transmittion time */
1276 stats
->tx_packets
++;
1277 dev
->trans_start
= jiffies
;
1279 spin_unlock_irqrestore(&mp
->lock
, flags
);
1281 return 0; /* success */
1285 * mv643xx_eth_get_stats
1287 * Returns a pointer to the interface statistics.
1289 * Input : dev - a pointer to the required interface
1291 * Output : a pointer to the interface's statistics
1294 static struct net_device_stats
*mv643xx_eth_get_stats(struct net_device
*dev
)
1296 struct mv643xx_private
*mp
= netdev_priv(dev
);
1301 #ifdef CONFIG_NET_POLL_CONTROLLER
1302 static void mv643xx_netpoll(struct net_device
*netdev
)
1304 struct mv643xx_private
*mp
= netdev_priv(netdev
);
1305 int port_num
= mp
->port_num
;
1307 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
), INT_MASK_ALL
);
1308 /* wait for previous write to complete */
1309 mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
));
1311 mv643xx_eth_int_handler(netdev
->irq
, netdev
, NULL
);
1313 mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num
), INT_UNMASK_ALL
);
1320 * First function called after registering the network device.
1321 * It's purpose is to initialize the device as an ethernet device,
1322 * fill the ethernet device structure with pointers * to functions,
1323 * and set the MAC address of the interface
1325 * Input : struct device *
1326 * Output : -ENOMEM if failed , 0 if success
1328 static int mv643xx_eth_probe(struct platform_device
*pdev
)
1330 struct mv643xx_eth_platform_data
*pd
;
1331 int port_num
= pdev
->id
;
1332 struct mv643xx_private
*mp
;
1333 struct net_device
*dev
;
1335 struct resource
*res
;
1338 dev
= alloc_etherdev(sizeof(struct mv643xx_private
));
1342 platform_set_drvdata(pdev
, dev
);
1344 mp
= netdev_priv(dev
);
1346 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
1348 dev
->irq
= res
->start
;
1350 mp
->port_num
= port_num
;
1352 dev
->open
= mv643xx_eth_open
;
1353 dev
->stop
= mv643xx_eth_stop
;
1354 dev
->hard_start_xmit
= mv643xx_eth_start_xmit
;
1355 dev
->get_stats
= mv643xx_eth_get_stats
;
1356 dev
->set_mac_address
= mv643xx_eth_set_mac_address
;
1357 dev
->set_multicast_list
= mv643xx_eth_set_rx_mode
;
1359 /* No need to Tx Timeout */
1360 dev
->tx_timeout
= mv643xx_eth_tx_timeout
;
1362 dev
->poll
= mv643xx_poll
;
1366 #ifdef CONFIG_NET_POLL_CONTROLLER
1367 dev
->poll_controller
= mv643xx_netpoll
;
1370 dev
->watchdog_timeo
= 2 * HZ
;
1371 dev
->tx_queue_len
= mp
->tx_ring_size
;
1373 dev
->change_mtu
= mv643xx_eth_change_mtu
;
1374 SET_ETHTOOL_OPS(dev
, &mv643xx_ethtool_ops
);
1376 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
1377 #ifdef MAX_SKB_FRAGS
1379 * Zero copy can only work if we use Discovery II memory. Else, we will
1380 * have to map the buffers to ISA memory which is only 16 MB
1382 dev
->features
= NETIF_F_SG
| NETIF_F_IP_CSUM
;
1386 /* Configure the timeout task */
1387 INIT_WORK(&mp
->tx_timeout_task
,
1388 (void (*)(void *))mv643xx_eth_tx_timeout_task
, dev
);
1390 spin_lock_init(&mp
->lock
);
1392 /* set default config values */
1393 eth_port_uc_addr_get(dev
, dev
->dev_addr
);
1394 mp
->port_config
= MV643XX_ETH_PORT_CONFIG_DEFAULT_VALUE
;
1395 mp
->port_config_extend
= MV643XX_ETH_PORT_CONFIG_EXTEND_DEFAULT_VALUE
;
1396 mp
->port_sdma_config
= MV643XX_ETH_PORT_SDMA_CONFIG_DEFAULT_VALUE
;
1397 mp
->port_serial_control
= MV643XX_ETH_PORT_SERIAL_CONTROL_DEFAULT_VALUE
;
1398 mp
->rx_ring_size
= MV643XX_ETH_PORT_DEFAULT_RECEIVE_QUEUE_SIZE
;
1399 mp
->tx_ring_size
= MV643XX_ETH_PORT_DEFAULT_TRANSMIT_QUEUE_SIZE
;
1401 pd
= pdev
->dev
.platform_data
;
1403 if (pd
->mac_addr
!= NULL
)
1404 memcpy(dev
->dev_addr
, pd
->mac_addr
, 6);
1406 if (pd
->phy_addr
|| pd
->force_phy_addr
)
1407 ethernet_phy_set(port_num
, pd
->phy_addr
);
1409 if (pd
->port_config
|| pd
->force_port_config
)
1410 mp
->port_config
= pd
->port_config
;
1412 if (pd
->port_config_extend
|| pd
->force_port_config_extend
)
1413 mp
->port_config_extend
= pd
->port_config_extend
;
1415 if (pd
->port_sdma_config
|| pd
->force_port_sdma_config
)
1416 mp
->port_sdma_config
= pd
->port_sdma_config
;
1418 if (pd
->port_serial_control
|| pd
->force_port_serial_control
)
1419 mp
->port_serial_control
= pd
->port_serial_control
;
1421 if (pd
->rx_queue_size
)
1422 mp
->rx_ring_size
= pd
->rx_queue_size
;
1424 if (pd
->tx_queue_size
)
1425 mp
->tx_ring_size
= pd
->tx_queue_size
;
1427 if (pd
->tx_sram_size
) {
1428 mp
->tx_sram_size
= pd
->tx_sram_size
;
1429 mp
->tx_sram_addr
= pd
->tx_sram_addr
;
1432 if (pd
->rx_sram_size
) {
1433 mp
->rx_sram_size
= pd
->rx_sram_size
;
1434 mp
->rx_sram_addr
= pd
->rx_sram_addr
;
1438 err
= ethernet_phy_detect(port_num
);
1440 pr_debug("MV643xx ethernet port %d: "
1441 "No PHY detected at addr %d\n",
1442 port_num
, ethernet_phy_get(port_num
));
1446 err
= register_netdev(dev
);
1452 "%s: port %d with MAC address %02x:%02x:%02x:%02x:%02x:%02x\n",
1453 dev
->name
, port_num
, p
[0], p
[1], p
[2], p
[3], p
[4], p
[5]);
1455 if (dev
->features
& NETIF_F_SG
)
1456 printk(KERN_NOTICE
"%s: Scatter Gather Enabled\n", dev
->name
);
1458 if (dev
->features
& NETIF_F_IP_CSUM
)
1459 printk(KERN_NOTICE
"%s: TX TCP/IP Checksumming Supported\n",
1462 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
1463 printk(KERN_NOTICE
"%s: RX TCP/UDP Checksum Offload ON \n", dev
->name
);
1467 printk(KERN_NOTICE
"%s: TX and RX Interrupt Coalescing ON \n",
1472 printk(KERN_NOTICE
"%s: RX NAPI Enabled \n", dev
->name
);
1475 if (mp
->tx_sram_size
> 0)
1476 printk(KERN_NOTICE
"%s: Using SRAM\n", dev
->name
);
1486 static int mv643xx_eth_remove(struct platform_device
*pdev
)
1488 struct net_device
*dev
= platform_get_drvdata(pdev
);
1490 unregister_netdev(dev
);
1491 flush_scheduled_work();
1494 platform_set_drvdata(pdev
, NULL
);
1498 static int mv643xx_eth_shared_probe(struct platform_device
*pdev
)
1500 struct resource
*res
;
1502 printk(KERN_NOTICE
"MV-643xx 10/100/1000 Ethernet Driver\n");
1504 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1508 mv643xx_eth_shared_base
= ioremap(res
->start
,
1509 MV643XX_ETH_SHARED_REGS_SIZE
);
1510 if (mv643xx_eth_shared_base
== NULL
)
1517 static int mv643xx_eth_shared_remove(struct platform_device
*pdev
)
1519 iounmap(mv643xx_eth_shared_base
);
1520 mv643xx_eth_shared_base
= NULL
;
1525 static struct platform_driver mv643xx_eth_driver
= {
1526 .probe
= mv643xx_eth_probe
,
1527 .remove
= mv643xx_eth_remove
,
1529 .name
= MV643XX_ETH_NAME
,
1533 static struct platform_driver mv643xx_eth_shared_driver
= {
1534 .probe
= mv643xx_eth_shared_probe
,
1535 .remove
= mv643xx_eth_shared_remove
,
1537 .name
= MV643XX_ETH_SHARED_NAME
,
1542 * mv643xx_init_module
1544 * Registers the network drivers into the Linux kernel
1550 static int __init
mv643xx_init_module(void)
1554 rc
= platform_driver_register(&mv643xx_eth_shared_driver
);
1556 rc
= platform_driver_register(&mv643xx_eth_driver
);
1558 platform_driver_unregister(&mv643xx_eth_shared_driver
);
1564 * mv643xx_cleanup_module
1566 * Registers the network drivers into the Linux kernel
1572 static void __exit
mv643xx_cleanup_module(void)
1574 platform_driver_unregister(&mv643xx_eth_driver
);
1575 platform_driver_unregister(&mv643xx_eth_shared_driver
);
1578 module_init(mv643xx_init_module
);
1579 module_exit(mv643xx_cleanup_module
);
1581 MODULE_LICENSE("GPL");
1582 MODULE_AUTHOR( "Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, Manish Lachwani"
1583 " and Dale Farnsworth");
1584 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX");
1587 * The second part is the low level driver of the gigE ethernet ports.
1591 * Marvell's Gigabit Ethernet controller low level driver
1594 * This file introduce low level API to Marvell's Gigabit Ethernet
1595 * controller. This Gigabit Ethernet Controller driver API controls
1596 * 1) Operations (i.e. port init, start, reset etc').
1597 * 2) Data flow (i.e. port send, receive etc').
1598 * Each Gigabit Ethernet port is controlled via
1599 * struct mv643xx_private.
1600 * This struct includes user configuration information as well as
1601 * driver internal data needed for its operations.
1603 * Supported Features:
1604 * - This low level driver is OS independent. Allocating memory for
1605 * the descriptor rings and buffers are not within the scope of
1607 * - The user is free from Rx/Tx queue managing.
1608 * - This low level driver introduce functionality API that enable
1609 * the to operate Marvell's Gigabit Ethernet Controller in a
1611 * - Simple Gigabit Ethernet port operation API.
1612 * - Simple Gigabit Ethernet port data flow API.
1613 * - Data flow and operation API support per queue functionality.
1614 * - Support cached descriptors for better performance.
1615 * - Enable access to all four DRAM banks and internal SRAM memory
1617 * - PHY access and control API.
1618 * - Port control register configuration API.
1619 * - Full control over Unicast and Multicast MAC configurations.
1623 * Initialization phase
1624 * This phase complete the initialization of the the
1625 * mv643xx_private struct.
1626 * User information regarding port configuration has to be set
1627 * prior to calling the port initialization routine.
1629 * In this phase any port Tx/Rx activity is halted, MIB counters
1630 * are cleared, PHY address is set according to user parameter and
1631 * access to DRAM and internal SRAM memory spaces.
1633 * Driver ring initialization
1634 * Allocating memory for the descriptor rings and buffers is not
1635 * within the scope of this driver. Thus, the user is required to
1636 * allocate memory for the descriptors ring and buffers. Those
1637 * memory parameters are used by the Rx and Tx ring initialization
1638 * routines in order to curve the descriptor linked list in a form
1640 * Note: Pay special attention to alignment issues when using
1641 * cached descriptors/buffers. In this phase the driver store
1642 * information in the mv643xx_private struct regarding each queue
1646 * This phase prepares the Ethernet port for Rx and Tx activity.
1647 * It uses the information stored in the mv643xx_private struct to
1648 * initialize the various port registers.
1651 * All packet references to/from the driver are done using
1653 * This struct is a unified struct used with Rx and Tx operations.
1654 * This way the user is not required to be familiar with neither
1655 * Tx nor Rx descriptors structures.
1656 * The driver's descriptors rings are management by indexes.
1657 * Those indexes controls the ring resources and used to indicate
1658 * a SW resource error:
1660 * This index points to the current available resource for use. For
1661 * example in Rx process this index will point to the descriptor
1662 * that will be passed to the user upon calling the receive
1663 * routine. In Tx process, this index will point to the descriptor
1664 * that will be assigned with the user packet info and transmitted.
1666 * This index points to the descriptor that need to restore its
1667 * resources. For example in Rx process, using the Rx buffer return
1668 * API will attach the buffer returned in packet info to the
1669 * descriptor pointed by 'used'. In Tx process, using the Tx
1670 * descriptor return will merely return the user packet info with
1671 * the command status of the transmitted buffer pointed by the
1672 * 'used' index. Nevertheless, it is essential to use this routine
1673 * to update the 'used' index.
1675 * This index supports Tx Scatter-Gather. It points to the first
1676 * descriptor of a packet assembled of multiple buffers. For
1677 * example when in middle of Such packet we have a Tx resource
1678 * error the 'curr' index get the value of 'first' to indicate
1679 * that the ring returned to its state before trying to transmit
1682 * Receive operation:
1683 * The eth_port_receive API set the packet information struct,
1684 * passed by the caller, with received information from the
1685 * 'current' SDMA descriptor.
1686 * It is the user responsibility to return this resource back
1687 * to the Rx descriptor ring to enable the reuse of this source.
1688 * Return Rx resource is done using the eth_rx_return_buff API.
1690 * Transmit operation:
1691 * The eth_port_send API supports Scatter-Gather which enables to
1692 * send a packet spanned over multiple buffers. This means that
1693 * for each packet info structure given by the user and put into
1694 * the Tx descriptors ring, will be transmitted only if the 'LAST'
1695 * bit will be set in the packet info command status field. This
1696 * API also consider restriction regarding buffer alignments and
1698 * The user must return a Tx resource after ensuring the buffer
1699 * has been transmitted to enable the Tx ring indexes to update.
1702 * This device is on-board. No jumper diagram is necessary.
1704 * EXTERNAL INTERFACE
1706 * Prior to calling the initialization routine eth_port_init() the user
1707 * must set the following fields under mv643xx_private struct:
1708 * port_num User Ethernet port number.
1709 * port_mac_addr[6] User defined port MAC address.
1710 * port_config User port configuration value.
1711 * port_config_extend User port config extend value.
1712 * port_sdma_config User port SDMA config value.
1713 * port_serial_control User port serial control value.
1715 * This driver data flow is done using the struct pkt_info which
1716 * is a unified struct for Rx and Tx operations:
1718 * byte_cnt Tx/Rx descriptor buffer byte count.
1719 * l4i_chk CPU provided TCP Checksum. For Tx operation
1721 * cmd_sts Tx/Rx descriptor command status.
1722 * buf_ptr Tx/Rx descriptor buffer pointer.
1723 * return_info Tx/Rx user resource return information.
1727 /* SDMA command macros */
1728 #define ETH_ENABLE_TX_QUEUE(eth_port) \
1729 mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port), 1)
1734 static int ethernet_phy_get(unsigned int eth_port_num
);
1735 static void ethernet_phy_set(unsigned int eth_port_num
, int phy_addr
);
1737 /* Ethernet Port routines */
1738 static int eth_port_uc_addr(unsigned int eth_port_num
, unsigned char uc_nibble
,
1742 * eth_port_init - Initialize the Ethernet port driver
1745 * This function prepares the ethernet port to start its activity:
1746 * 1) Completes the ethernet port driver struct initialization toward port
1748 * 2) Resets the device to a quiescent state in case of warm reboot.
1749 * 3) Enable SDMA access to all four DRAM banks as well as internal SRAM.
1750 * 4) Clean MAC tables. The reset status of those tables is unknown.
1751 * 5) Set PHY address.
1752 * Note: Call this routine prior to eth_port_start routine and after
1753 * setting user values in the user fields of Ethernet port control
1757 * struct mv643xx_private *mp Ethernet port control struct
1765 static void eth_port_init(struct mv643xx_private
*mp
)
1767 mp
->port_rx_queue_command
= 0;
1768 mp
->port_tx_queue_command
= 0;
1770 mp
->rx_resource_err
= 0;
1771 mp
->tx_resource_err
= 0;
1773 eth_port_reset(mp
->port_num
);
1775 eth_port_init_mac_tables(mp
->port_num
);
1777 ethernet_phy_reset(mp
->port_num
);
1781 * eth_port_start - Start the Ethernet port activity.
1784 * This routine prepares the Ethernet port for Rx and Tx activity:
1785 * 1. Initialize Tx and Rx Current Descriptor Pointer for each queue that
1786 * has been initialized a descriptor's ring (using
1787 * ether_init_tx_desc_ring for Tx and ether_init_rx_desc_ring for Rx)
1788 * 2. Initialize and enable the Ethernet configuration port by writing to
1789 * the port's configuration and command registers.
1790 * 3. Initialize and enable the SDMA by writing to the SDMA's
1791 * configuration and command registers. After completing these steps,
1792 * the ethernet port SDMA can starts to perform Rx and Tx activities.
1794 * Note: Each Rx and Tx queue descriptor's list must be initialized prior
1795 * to calling this function (use ether_init_tx_desc_ring for Tx queues
1796 * and ether_init_rx_desc_ring for Rx queues).
1799 * struct mv643xx_private *mp Ethernet port control struct
1802 * Ethernet port is ready to receive and transmit.
1807 static void eth_port_start(struct mv643xx_private
*mp
)
1809 unsigned int port_num
= mp
->port_num
;
1810 int tx_curr_desc
, rx_curr_desc
;
1812 /* Assignment of Tx CTRP of given queue */
1813 tx_curr_desc
= mp
->tx_curr_desc_q
;
1814 mv_write(MV643XX_ETH_TX_CURRENT_QUEUE_DESC_PTR_0(port_num
),
1815 (u32
)((struct eth_tx_desc
*)mp
->tx_desc_dma
+ tx_curr_desc
));
1817 /* Assignment of Rx CRDP of given queue */
1818 rx_curr_desc
= mp
->rx_curr_desc_q
;
1819 mv_write(MV643XX_ETH_RX_CURRENT_QUEUE_DESC_PTR_0(port_num
),
1820 (u32
)((struct eth_rx_desc
*)mp
->rx_desc_dma
+ rx_curr_desc
));
1822 /* Add the assigned Ethernet address to the port's address table */
1823 eth_port_uc_addr_set(port_num
, mp
->port_mac_addr
);
1825 /* Assign port configuration and command. */
1826 mv_write(MV643XX_ETH_PORT_CONFIG_REG(port_num
), mp
->port_config
);
1828 mv_write(MV643XX_ETH_PORT_CONFIG_EXTEND_REG(port_num
),
1829 mp
->port_config_extend
);
1832 /* Increase the Rx side buffer size if supporting GigE */
1833 if (mp
->port_serial_control
& MV643XX_ETH_SET_GMII_SPEED_TO_1000
)
1834 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
),
1835 (mp
->port_serial_control
& 0xfff1ffff) | (0x5 << 17));
1837 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
),
1838 mp
->port_serial_control
);
1840 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
),
1841 mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
)) |
1842 MV643XX_ETH_SERIAL_PORT_ENABLE
);
1844 /* Assign port SDMA configuration */
1845 mv_write(MV643XX_ETH_SDMA_CONFIG_REG(port_num
),
1846 mp
->port_sdma_config
);
1848 /* Enable port Rx. */
1849 mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num
),
1850 mp
->port_rx_queue_command
);
1852 /* Disable port bandwidth limits by clearing MTU register */
1853 mv_write(MV643XX_ETH_MAXIMUM_TRANSMIT_UNIT(port_num
), 0);
1857 * eth_port_uc_addr_set - This function Set the port Unicast address.
1860 * This function Set the port Ethernet MAC address.
1863 * unsigned int eth_port_num Port number.
1864 * char * p_addr Address to be set
1867 * Set MAC address low and high registers. also calls eth_port_uc_addr()
1868 * To set the unicast table with the proper information.
1874 static void eth_port_uc_addr_set(unsigned int eth_port_num
,
1875 unsigned char *p_addr
)
1880 mac_l
= (p_addr
[4] << 8) | (p_addr
[5]);
1881 mac_h
= (p_addr
[0] << 24) | (p_addr
[1] << 16) | (p_addr
[2] << 8) |
1884 mv_write(MV643XX_ETH_MAC_ADDR_LOW(eth_port_num
), mac_l
);
1885 mv_write(MV643XX_ETH_MAC_ADDR_HIGH(eth_port_num
), mac_h
);
1887 /* Accept frames of this address */
1888 eth_port_uc_addr(eth_port_num
, p_addr
[5], ACCEPT_MAC_ADDR
);
1894 * eth_port_uc_addr_get - This function retrieves the port Unicast address
1895 * (MAC address) from the ethernet hw registers.
1898 * This function retrieves the port Ethernet MAC address.
1901 * unsigned int eth_port_num Port number.
1902 * char *MacAddr pointer where the MAC address is stored
1905 * Copy the MAC address to the location pointed to by MacAddr
1911 static void eth_port_uc_addr_get(struct net_device
*dev
, unsigned char *p_addr
)
1913 struct mv643xx_private
*mp
= netdev_priv(dev
);
1917 mac_h
= mv_read(MV643XX_ETH_MAC_ADDR_HIGH(mp
->port_num
));
1918 mac_l
= mv_read(MV643XX_ETH_MAC_ADDR_LOW(mp
->port_num
));
1920 p_addr
[0] = (mac_h
>> 24) & 0xff;
1921 p_addr
[1] = (mac_h
>> 16) & 0xff;
1922 p_addr
[2] = (mac_h
>> 8) & 0xff;
1923 p_addr
[3] = mac_h
& 0xff;
1924 p_addr
[4] = (mac_l
>> 8) & 0xff;
1925 p_addr
[5] = mac_l
& 0xff;
1929 * eth_port_uc_addr - This function Set the port unicast address table
1932 * This function locates the proper entry in the Unicast table for the
1933 * specified MAC nibble and sets its properties according to function
1937 * unsigned int eth_port_num Port number.
1938 * unsigned char uc_nibble Unicast MAC Address last nibble.
1939 * int option 0 = Add, 1 = remove address.
1942 * This function add/removes MAC addresses from the port unicast address
1946 * true is output succeeded.
1947 * false if option parameter is invalid.
1950 static int eth_port_uc_addr(unsigned int eth_port_num
, unsigned char uc_nibble
,
1953 unsigned int unicast_reg
;
1954 unsigned int tbl_offset
;
1955 unsigned int reg_offset
;
1957 /* Locate the Unicast table entry */
1958 uc_nibble
= (0xf & uc_nibble
);
1959 tbl_offset
= (uc_nibble
/ 4) * 4; /* Register offset from unicast table base */
1960 reg_offset
= uc_nibble
% 4; /* Entry offset within the above register */
1963 case REJECT_MAC_ADDR
:
1964 /* Clear accepts frame bit at given unicast DA table entry */
1965 unicast_reg
= mv_read((MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
1966 (eth_port_num
) + tbl_offset
));
1968 unicast_reg
&= (0x0E << (8 * reg_offset
));
1970 mv_write((MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
1971 (eth_port_num
) + tbl_offset
), unicast_reg
);
1974 case ACCEPT_MAC_ADDR
:
1975 /* Set accepts frame bit at unicast DA filter table entry */
1977 mv_read((MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
1978 (eth_port_num
) + tbl_offset
));
1980 unicast_reg
|= (0x01 << (8 * reg_offset
));
1982 mv_write((MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
1983 (eth_port_num
) + tbl_offset
), unicast_reg
);
1995 * The entries in each table are indexed by a hash of a packet's MAC
1996 * address. One bit in each entry determines whether the packet is
1997 * accepted. There are 4 entries (each 8 bits wide) in each register
1998 * of the table. The bits in each entry are defined as follows:
1999 * 0 Accept=1, Drop=0
2000 * 3-1 Queue (ETH_Q0=0)
2003 static void eth_port_set_filter_table_entry(int table
, unsigned char entry
)
2005 unsigned int table_reg
;
2006 unsigned int tbl_offset
;
2007 unsigned int reg_offset
;
2009 tbl_offset
= (entry
/ 4) * 4; /* Register offset of DA table entry */
2010 reg_offset
= entry
% 4; /* Entry offset within the register */
2012 /* Set "accepts frame bit" at specified table entry */
2013 table_reg
= mv_read(table
+ tbl_offset
);
2014 table_reg
|= 0x01 << (8 * reg_offset
);
2015 mv_write(table
+ tbl_offset
, table_reg
);
2019 * eth_port_mc_addr - Multicast address settings.
2021 * The MV device supports multicast using two tables:
2022 * 1) Special Multicast Table for MAC addresses of the form
2023 * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_FF).
2024 * The MAC DA[7:0] bits are used as a pointer to the Special Multicast
2025 * Table entries in the DA-Filter table.
2026 * 2) Other Multicast Table for multicast of another type. A CRC-8bit
2027 * is used as an index to the Other Multicast Table entries in the
2028 * DA-Filter table. This function calculates the CRC-8bit value.
2029 * In either case, eth_port_set_filter_table_entry() is then called
2030 * to set to set the actual table entry.
2032 static void eth_port_mc_addr(unsigned int eth_port_num
, unsigned char *p_addr
)
2036 unsigned char crc_result
= 0;
2042 if ((p_addr
[0] == 0x01) && (p_addr
[1] == 0x00) &&
2043 (p_addr
[2] == 0x5E) && (p_addr
[3] == 0x00) && (p_addr
[4] == 0x00)) {
2044 table
= MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
2046 eth_port_set_filter_table_entry(table
, p_addr
[5]);
2050 /* Calculate CRC-8 out of the given address */
2051 mac_h
= (p_addr
[0] << 8) | (p_addr
[1]);
2052 mac_l
= (p_addr
[2] << 24) | (p_addr
[3] << 16) |
2053 (p_addr
[4] << 8) | (p_addr
[5] << 0);
2055 for (i
= 0; i
< 32; i
++)
2056 mac_array
[i
] = (mac_l
>> i
) & 0x1;
2057 for (i
= 32; i
< 48; i
++)
2058 mac_array
[i
] = (mac_h
>> (i
- 32)) & 0x1;
2060 crc
[0] = mac_array
[45] ^ mac_array
[43] ^ mac_array
[40] ^ mac_array
[39] ^
2061 mac_array
[35] ^ mac_array
[34] ^ mac_array
[31] ^ mac_array
[30] ^
2062 mac_array
[28] ^ mac_array
[23] ^ mac_array
[21] ^ mac_array
[19] ^
2063 mac_array
[18] ^ mac_array
[16] ^ mac_array
[14] ^ mac_array
[12] ^
2064 mac_array
[8] ^ mac_array
[7] ^ mac_array
[6] ^ mac_array
[0];
2066 crc
[1] = mac_array
[46] ^ mac_array
[45] ^ mac_array
[44] ^ mac_array
[43] ^
2067 mac_array
[41] ^ mac_array
[39] ^ mac_array
[36] ^ mac_array
[34] ^
2068 mac_array
[32] ^ mac_array
[30] ^ mac_array
[29] ^ mac_array
[28] ^
2069 mac_array
[24] ^ mac_array
[23] ^ mac_array
[22] ^ mac_array
[21] ^
2070 mac_array
[20] ^ mac_array
[18] ^ mac_array
[17] ^ mac_array
[16] ^
2071 mac_array
[15] ^ mac_array
[14] ^ mac_array
[13] ^ mac_array
[12] ^
2072 mac_array
[9] ^ mac_array
[6] ^ mac_array
[1] ^ mac_array
[0];
2074 crc
[2] = mac_array
[47] ^ mac_array
[46] ^ mac_array
[44] ^ mac_array
[43] ^
2075 mac_array
[42] ^ mac_array
[39] ^ mac_array
[37] ^ mac_array
[34] ^
2076 mac_array
[33] ^ mac_array
[29] ^ mac_array
[28] ^ mac_array
[25] ^
2077 mac_array
[24] ^ mac_array
[22] ^ mac_array
[17] ^ mac_array
[15] ^
2078 mac_array
[13] ^ mac_array
[12] ^ mac_array
[10] ^ mac_array
[8] ^
2079 mac_array
[6] ^ mac_array
[2] ^ mac_array
[1] ^ mac_array
[0];
2081 crc
[3] = mac_array
[47] ^ mac_array
[45] ^ mac_array
[44] ^ mac_array
[43] ^
2082 mac_array
[40] ^ mac_array
[38] ^ mac_array
[35] ^ mac_array
[34] ^
2083 mac_array
[30] ^ mac_array
[29] ^ mac_array
[26] ^ mac_array
[25] ^
2084 mac_array
[23] ^ mac_array
[18] ^ mac_array
[16] ^ mac_array
[14] ^
2085 mac_array
[13] ^ mac_array
[11] ^ mac_array
[9] ^ mac_array
[7] ^
2086 mac_array
[3] ^ mac_array
[2] ^ mac_array
[1];
2088 crc
[4] = mac_array
[46] ^ mac_array
[45] ^ mac_array
[44] ^ mac_array
[41] ^
2089 mac_array
[39] ^ mac_array
[36] ^ mac_array
[35] ^ mac_array
[31] ^
2090 mac_array
[30] ^ mac_array
[27] ^ mac_array
[26] ^ mac_array
[24] ^
2091 mac_array
[19] ^ mac_array
[17] ^ mac_array
[15] ^ mac_array
[14] ^
2092 mac_array
[12] ^ mac_array
[10] ^ mac_array
[8] ^ mac_array
[4] ^
2093 mac_array
[3] ^ mac_array
[2];
2095 crc
[5] = mac_array
[47] ^ mac_array
[46] ^ mac_array
[45] ^ mac_array
[42] ^
2096 mac_array
[40] ^ mac_array
[37] ^ mac_array
[36] ^ mac_array
[32] ^
2097 mac_array
[31] ^ mac_array
[28] ^ mac_array
[27] ^ mac_array
[25] ^
2098 mac_array
[20] ^ mac_array
[18] ^ mac_array
[16] ^ mac_array
[15] ^
2099 mac_array
[13] ^ mac_array
[11] ^ mac_array
[9] ^ mac_array
[5] ^
2100 mac_array
[4] ^ mac_array
[3];
2102 crc
[6] = mac_array
[47] ^ mac_array
[46] ^ mac_array
[43] ^ mac_array
[41] ^
2103 mac_array
[38] ^ mac_array
[37] ^ mac_array
[33] ^ mac_array
[32] ^
2104 mac_array
[29] ^ mac_array
[28] ^ mac_array
[26] ^ mac_array
[21] ^
2105 mac_array
[19] ^ mac_array
[17] ^ mac_array
[16] ^ mac_array
[14] ^
2106 mac_array
[12] ^ mac_array
[10] ^ mac_array
[6] ^ mac_array
[5] ^
2109 crc
[7] = mac_array
[47] ^ mac_array
[44] ^ mac_array
[42] ^ mac_array
[39] ^
2110 mac_array
[38] ^ mac_array
[34] ^ mac_array
[33] ^ mac_array
[30] ^
2111 mac_array
[29] ^ mac_array
[27] ^ mac_array
[22] ^ mac_array
[20] ^
2112 mac_array
[18] ^ mac_array
[17] ^ mac_array
[15] ^ mac_array
[13] ^
2113 mac_array
[11] ^ mac_array
[7] ^ mac_array
[6] ^ mac_array
[5];
2115 for (i
= 0; i
< 8; i
++)
2116 crc_result
= crc_result
| (crc
[i
] << i
);
2118 table
= MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num
);
2119 eth_port_set_filter_table_entry(table
, crc_result
);
2123 * Set the entire multicast list based on dev->mc_list.
2125 static void eth_port_set_multicast_list(struct net_device
*dev
)
2128 struct dev_mc_list
*mc_list
;
2131 struct mv643xx_private
*mp
= netdev_priv(dev
);
2132 unsigned int eth_port_num
= mp
->port_num
;
2134 /* If the device is in promiscuous mode or in all multicast mode,
2135 * we will fully populate both multicast tables with accept.
2136 * This is guaranteed to yield a match on all multicast addresses...
2138 if ((dev
->flags
& IFF_PROMISC
) || (dev
->flags
& IFF_ALLMULTI
)) {
2139 for (table_index
= 0; table_index
<= 0xFC; table_index
+= 4) {
2140 /* Set all entries in DA filter special multicast
2142 * Set for ETH_Q0 for now
2144 * 0 Accept=1, Drop=0
2145 * 3-1 Queue ETH_Q0=0
2148 mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE(eth_port_num
) + table_index
, 0x01010101);
2150 /* Set all entries in DA filter other multicast
2152 * Set for ETH_Q0 for now
2154 * 0 Accept=1, Drop=0
2155 * 3-1 Queue ETH_Q0=0
2158 mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE(eth_port_num
) + table_index
, 0x01010101);
2163 /* We will clear out multicast tables every time we get the list.
2164 * Then add the entire new list...
2166 for (table_index
= 0; table_index
<= 0xFC; table_index
+= 4) {
2167 /* Clear DA filter special multicast table (Ex_dFSMT) */
2168 mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
2169 (eth_port_num
) + table_index
, 0);
2171 /* Clear DA filter other multicast table (Ex_dFOMT) */
2172 mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE
2173 (eth_port_num
) + table_index
, 0);
2176 /* Get pointer to net_device multicast list and add each one... */
2177 for (i
= 0, mc_list
= dev
->mc_list
;
2178 (i
< 256) && (mc_list
!= NULL
) && (i
< dev
->mc_count
);
2179 i
++, mc_list
= mc_list
->next
)
2180 if (mc_list
->dmi_addrlen
== 6)
2181 eth_port_mc_addr(eth_port_num
, mc_list
->dmi_addr
);
2185 * eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
2188 * Go through all the DA filter tables (Unicast, Special Multicast &
2189 * Other Multicast) and set each entry to 0.
2192 * unsigned int eth_port_num Ethernet Port number.
2195 * Multicast and Unicast packets are rejected.
2200 static void eth_port_init_mac_tables(unsigned int eth_port_num
)
2204 /* Clear DA filter unicast table (Ex_dFUT) */
2205 for (table_index
= 0; table_index
<= 0xC; table_index
+= 4)
2206 mv_write((MV643XX_ETH_DA_FILTER_UNICAST_TABLE_BASE
2207 (eth_port_num
) + table_index
), 0);
2209 for (table_index
= 0; table_index
<= 0xFC; table_index
+= 4) {
2210 /* Clear DA filter special multicast table (Ex_dFSMT) */
2211 mv_write(MV643XX_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE
2212 (eth_port_num
) + table_index
, 0);
2213 /* Clear DA filter other multicast table (Ex_dFOMT) */
2214 mv_write(MV643XX_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE
2215 (eth_port_num
) + table_index
, 0);
2220 * eth_clear_mib_counters - Clear all MIB counters
2223 * This function clears all MIB counters of a specific ethernet port.
2224 * A read from the MIB counter will reset the counter.
2227 * unsigned int eth_port_num Ethernet Port number.
2230 * After reading all MIB counters, the counters resets.
2233 * MIB counter value.
2236 static void eth_clear_mib_counters(unsigned int eth_port_num
)
2240 /* Perform dummy reads from MIB counters */
2241 for (i
= ETH_MIB_GOOD_OCTETS_RECEIVED_LOW
; i
< ETH_MIB_LATE_COLLISION
;
2243 mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(eth_port_num
) + i
);
2246 static inline u32
read_mib(struct mv643xx_private
*mp
, int offset
)
2248 return mv_read(MV643XX_ETH_MIB_COUNTERS_BASE(mp
->port_num
) + offset
);
2251 static void eth_update_mib_counters(struct mv643xx_private
*mp
)
2253 struct mv643xx_mib_counters
*p
= &mp
->mib_counters
;
2256 p
->good_octets_received
+=
2257 read_mib(mp
, ETH_MIB_GOOD_OCTETS_RECEIVED_LOW
);
2258 p
->good_octets_received
+=
2259 (u64
)read_mib(mp
, ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH
) << 32;
2261 for (offset
= ETH_MIB_BAD_OCTETS_RECEIVED
;
2262 offset
<= ETH_MIB_FRAMES_1024_TO_MAX_OCTETS
;
2264 *(u32
*)((char *)p
+ offset
) = read_mib(mp
, offset
);
2266 p
->good_octets_sent
+= read_mib(mp
, ETH_MIB_GOOD_OCTETS_SENT_LOW
);
2267 p
->good_octets_sent
+=
2268 (u64
)read_mib(mp
, ETH_MIB_GOOD_OCTETS_SENT_HIGH
) << 32;
2270 for (offset
= ETH_MIB_GOOD_FRAMES_SENT
;
2271 offset
<= ETH_MIB_LATE_COLLISION
;
2273 *(u32
*)((char *)p
+ offset
) = read_mib(mp
, offset
);
2277 * ethernet_phy_detect - Detect whether a phy is present
2280 * This function tests whether there is a PHY present on
2281 * the specified port.
2284 * unsigned int eth_port_num Ethernet Port number.
2291 * -ENODEV on failure
2294 static int ethernet_phy_detect(unsigned int port_num
)
2296 unsigned int phy_reg_data0
;
2299 eth_port_read_smi_reg(port_num
, 0, &phy_reg_data0
);
2300 auto_neg
= phy_reg_data0
& 0x1000;
2301 phy_reg_data0
^= 0x1000; /* invert auto_neg */
2302 eth_port_write_smi_reg(port_num
, 0, phy_reg_data0
);
2304 eth_port_read_smi_reg(port_num
, 0, &phy_reg_data0
);
2305 if ((phy_reg_data0
& 0x1000) == auto_neg
)
2306 return -ENODEV
; /* change didn't take */
2308 phy_reg_data0
^= 0x1000;
2309 eth_port_write_smi_reg(port_num
, 0, phy_reg_data0
);
2314 * ethernet_phy_get - Get the ethernet port PHY address.
2317 * This routine returns the given ethernet port PHY address.
2320 * unsigned int eth_port_num Ethernet Port number.
2329 static int ethernet_phy_get(unsigned int eth_port_num
)
2331 unsigned int reg_data
;
2333 reg_data
= mv_read(MV643XX_ETH_PHY_ADDR_REG
);
2335 return ((reg_data
>> (5 * eth_port_num
)) & 0x1f);
2339 * ethernet_phy_set - Set the ethernet port PHY address.
2342 * This routine sets the given ethernet port PHY address.
2345 * unsigned int eth_port_num Ethernet Port number.
2346 * int phy_addr PHY address.
2355 static void ethernet_phy_set(unsigned int eth_port_num
, int phy_addr
)
2358 int addr_shift
= 5 * eth_port_num
;
2360 reg_data
= mv_read(MV643XX_ETH_PHY_ADDR_REG
);
2361 reg_data
&= ~(0x1f << addr_shift
);
2362 reg_data
|= (phy_addr
& 0x1f) << addr_shift
;
2363 mv_write(MV643XX_ETH_PHY_ADDR_REG
, reg_data
);
2367 * ethernet_phy_reset - Reset Ethernet port PHY.
2370 * This routine utilizes the SMI interface to reset the ethernet port PHY.
2373 * unsigned int eth_port_num Ethernet Port number.
2382 static void ethernet_phy_reset(unsigned int eth_port_num
)
2384 unsigned int phy_reg_data
;
2387 eth_port_read_smi_reg(eth_port_num
, 0, &phy_reg_data
);
2388 phy_reg_data
|= 0x8000; /* Set bit 15 to reset the PHY */
2389 eth_port_write_smi_reg(eth_port_num
, 0, phy_reg_data
);
2393 * eth_port_reset - Reset Ethernet port
2396 * This routine resets the chip by aborting any SDMA engine activity and
2397 * clearing the MIB counters. The Receiver and the Transmit unit are in
2398 * idle state after this command is performed and the port is disabled.
2401 * unsigned int eth_port_num Ethernet Port number.
2404 * Channel activity is halted.
2410 static void eth_port_reset(unsigned int port_num
)
2412 unsigned int reg_data
;
2414 /* Stop Tx port activity. Check port Tx activity. */
2415 reg_data
= mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num
));
2417 if (reg_data
& 0xFF) {
2418 /* Issue stop command for active channels only */
2419 mv_write(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num
),
2422 /* Wait for all Tx activity to terminate. */
2423 /* Check port cause register that all Tx queues are stopped */
2424 while (mv_read(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(port_num
))
2429 /* Stop Rx port activity. Check port Rx activity. */
2430 reg_data
= mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num
));
2432 if (reg_data
& 0xFF) {
2433 /* Issue stop command for active channels only */
2434 mv_write(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num
),
2437 /* Wait for all Rx activity to terminate. */
2438 /* Check port cause register that all Rx queues are stopped */
2439 while (mv_read(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(port_num
))
2444 /* Clear all MIB counters */
2445 eth_clear_mib_counters(port_num
);
2447 /* Reset the Enable bit in the Configuration Register */
2448 reg_data
= mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
));
2449 reg_data
&= ~MV643XX_ETH_SERIAL_PORT_ENABLE
;
2450 mv_write(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
), reg_data
);
2454 static int eth_port_autoneg_supported(unsigned int eth_port_num
)
2456 unsigned int phy_reg_data0
;
2458 eth_port_read_smi_reg(eth_port_num
, 0, &phy_reg_data0
);
2460 return phy_reg_data0
& 0x1000;
2463 static int eth_port_link_is_up(unsigned int eth_port_num
)
2465 unsigned int phy_reg_data1
;
2467 eth_port_read_smi_reg(eth_port_num
, 1, &phy_reg_data1
);
2469 if (eth_port_autoneg_supported(eth_port_num
)) {
2470 if (phy_reg_data1
& 0x20) /* auto-neg complete */
2472 } else if (phy_reg_data1
& 0x4) /* link up */
2479 * eth_port_read_smi_reg - Read PHY registers
2482 * This routine utilize the SMI interface to interact with the PHY in
2483 * order to perform PHY register read.
2486 * unsigned int port_num Ethernet Port number.
2487 * unsigned int phy_reg PHY register address offset.
2488 * unsigned int *value Register value buffer.
2491 * Write the value of a specified PHY register into given buffer.
2494 * false if the PHY is busy or read data is not in valid state.
2498 static void eth_port_read_smi_reg(unsigned int port_num
,
2499 unsigned int phy_reg
, unsigned int *value
)
2501 int phy_addr
= ethernet_phy_get(port_num
);
2502 unsigned long flags
;
2505 /* the SMI register is a shared resource */
2506 spin_lock_irqsave(&mv643xx_eth_phy_lock
, flags
);
2508 /* wait for the SMI register to become available */
2509 for (i
= 0; mv_read(MV643XX_ETH_SMI_REG
) & ETH_SMI_BUSY
; i
++) {
2510 if (i
== PHY_WAIT_ITERATIONS
) {
2511 printk("mv643xx PHY busy timeout, port %d\n", port_num
);
2514 udelay(PHY_WAIT_MICRO_SECONDS
);
2517 mv_write(MV643XX_ETH_SMI_REG
,
2518 (phy_addr
<< 16) | (phy_reg
<< 21) | ETH_SMI_OPCODE_READ
);
2520 /* now wait for the data to be valid */
2521 for (i
= 0; !(mv_read(MV643XX_ETH_SMI_REG
) & ETH_SMI_READ_VALID
); i
++) {
2522 if (i
== PHY_WAIT_ITERATIONS
) {
2523 printk("mv643xx PHY read timeout, port %d\n", port_num
);
2526 udelay(PHY_WAIT_MICRO_SECONDS
);
2529 *value
= mv_read(MV643XX_ETH_SMI_REG
) & 0xffff;
2531 spin_unlock_irqrestore(&mv643xx_eth_phy_lock
, flags
);
2535 * eth_port_write_smi_reg - Write to PHY registers
2538 * This routine utilize the SMI interface to interact with the PHY in
2539 * order to perform writes to PHY registers.
2542 * unsigned int eth_port_num Ethernet Port number.
2543 * unsigned int phy_reg PHY register address offset.
2544 * unsigned int value Register value.
2547 * Write the given value to the specified PHY register.
2550 * false if the PHY is busy.
2554 static void eth_port_write_smi_reg(unsigned int eth_port_num
,
2555 unsigned int phy_reg
, unsigned int value
)
2559 unsigned long flags
;
2561 phy_addr
= ethernet_phy_get(eth_port_num
);
2563 /* the SMI register is a shared resource */
2564 spin_lock_irqsave(&mv643xx_eth_phy_lock
, flags
);
2566 /* wait for the SMI register to become available */
2567 for (i
= 0; mv_read(MV643XX_ETH_SMI_REG
) & ETH_SMI_BUSY
; i
++) {
2568 if (i
== PHY_WAIT_ITERATIONS
) {
2569 printk("mv643xx PHY busy timeout, port %d\n",
2573 udelay(PHY_WAIT_MICRO_SECONDS
);
2576 mv_write(MV643XX_ETH_SMI_REG
, (phy_addr
<< 16) | (phy_reg
<< 21) |
2577 ETH_SMI_OPCODE_WRITE
| (value
& 0xffff));
2579 spin_unlock_irqrestore(&mv643xx_eth_phy_lock
, flags
);
2583 * eth_port_send - Send an Ethernet packet
2586 * This routine send a given packet described by p_pktinfo parameter. It
2587 * supports transmitting of a packet spaned over multiple buffers. The
2588 * routine updates 'curr' and 'first' indexes according to the packet
2589 * segment passed to the routine. In case the packet segment is first,
2590 * the 'first' index is update. In any case, the 'curr' index is updated.
2591 * If the routine get into Tx resource error it assigns 'curr' index as
2592 * 'first'. This way the function can abort Tx process of multiple
2593 * descriptors per packet.
2596 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2597 * struct pkt_info *p_pkt_info User packet buffer.
2600 * Tx ring 'curr' and 'first' indexes are updated.
2603 * ETH_QUEUE_FULL in case of Tx resource error.
2604 * ETH_ERROR in case the routine can not access Tx desc ring.
2605 * ETH_QUEUE_LAST_RESOURCE if the routine uses the last Tx resource.
2609 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
2611 * Modified to include the first descriptor pointer in case of SG
2613 static ETH_FUNC_RET_STATUS
eth_port_send(struct mv643xx_private
*mp
,
2614 struct pkt_info
*p_pkt_info
)
2616 int tx_desc_curr
, tx_desc_used
, tx_first_desc
, tx_next_desc
;
2617 struct eth_tx_desc
*current_descriptor
;
2618 struct eth_tx_desc
*first_descriptor
;
2620 unsigned long flags
;
2622 /* Do not process Tx ring in case of Tx ring resource error */
2623 if (mp
->tx_resource_err
)
2624 return ETH_QUEUE_FULL
;
2627 * The hardware requires that each buffer that is <= 8 bytes
2628 * in length must be aligned on an 8 byte boundary.
2630 if (p_pkt_info
->byte_cnt
<= 8 && p_pkt_info
->buf_ptr
& 0x7) {
2632 "mv643xx_eth port %d: packet size <= 8 problem\n",
2637 spin_lock_irqsave(&mp
->lock
, flags
);
2640 BUG_ON(mp
->tx_ring_skbs
> mp
->tx_ring_size
);
2642 /* Get the Tx Desc ring indexes */
2643 tx_desc_curr
= mp
->tx_curr_desc_q
;
2644 tx_desc_used
= mp
->tx_used_desc_q
;
2646 current_descriptor
= &mp
->p_tx_desc_area
[tx_desc_curr
];
2648 tx_next_desc
= (tx_desc_curr
+ 1) % mp
->tx_ring_size
;
2650 current_descriptor
->buf_ptr
= p_pkt_info
->buf_ptr
;
2651 current_descriptor
->byte_cnt
= p_pkt_info
->byte_cnt
;
2652 current_descriptor
->l4i_chk
= p_pkt_info
->l4i_chk
;
2653 mp
->tx_skb
[tx_desc_curr
] = p_pkt_info
->return_info
;
2655 command
= p_pkt_info
->cmd_sts
| ETH_ZERO_PADDING
| ETH_GEN_CRC
|
2656 ETH_BUFFER_OWNED_BY_DMA
;
2657 if (command
& ETH_TX_FIRST_DESC
) {
2658 tx_first_desc
= tx_desc_curr
;
2659 mp
->tx_first_desc_q
= tx_first_desc
;
2660 first_descriptor
= current_descriptor
;
2661 mp
->tx_first_command
= command
;
2663 tx_first_desc
= mp
->tx_first_desc_q
;
2664 first_descriptor
= &mp
->p_tx_desc_area
[tx_first_desc
];
2665 BUG_ON(first_descriptor
== NULL
);
2666 current_descriptor
->cmd_sts
= command
;
2669 if (command
& ETH_TX_LAST_DESC
) {
2671 first_descriptor
->cmd_sts
= mp
->tx_first_command
;
2674 ETH_ENABLE_TX_QUEUE(mp
->port_num
);
2677 * Finish Tx packet. Update first desc in case of Tx resource
2679 tx_first_desc
= tx_next_desc
;
2680 mp
->tx_first_desc_q
= tx_first_desc
;
2683 /* Check for ring index overlap in the Tx desc ring */
2684 if (tx_next_desc
== tx_desc_used
) {
2685 mp
->tx_resource_err
= 1;
2686 mp
->tx_curr_desc_q
= tx_first_desc
;
2688 spin_unlock_irqrestore(&mp
->lock
, flags
);
2690 return ETH_QUEUE_LAST_RESOURCE
;
2693 mp
->tx_curr_desc_q
= tx_next_desc
;
2695 spin_unlock_irqrestore(&mp
->lock
, flags
);
2700 static ETH_FUNC_RET_STATUS
eth_port_send(struct mv643xx_private
*mp
,
2701 struct pkt_info
*p_pkt_info
)
2705 struct eth_tx_desc
*current_descriptor
;
2706 unsigned int command_status
;
2707 unsigned long flags
;
2709 /* Do not process Tx ring in case of Tx ring resource error */
2710 if (mp
->tx_resource_err
)
2711 return ETH_QUEUE_FULL
;
2713 spin_lock_irqsave(&mp
->lock
, flags
);
2716 BUG_ON(mp
->tx_ring_skbs
> mp
->tx_ring_size
);
2718 /* Get the Tx Desc ring indexes */
2719 tx_desc_curr
= mp
->tx_curr_desc_q
;
2720 tx_desc_used
= mp
->tx_used_desc_q
;
2721 current_descriptor
= &mp
->p_tx_desc_area
[tx_desc_curr
];
2723 command_status
= p_pkt_info
->cmd_sts
| ETH_ZERO_PADDING
| ETH_GEN_CRC
;
2724 current_descriptor
->buf_ptr
= p_pkt_info
->buf_ptr
;
2725 current_descriptor
->byte_cnt
= p_pkt_info
->byte_cnt
;
2726 mp
->tx_skb
[tx_desc_curr
] = p_pkt_info
->return_info
;
2728 /* Set last desc with DMA ownership and interrupt enable. */
2730 current_descriptor
->cmd_sts
= command_status
|
2731 ETH_BUFFER_OWNED_BY_DMA
| ETH_TX_ENABLE_INTERRUPT
;
2734 ETH_ENABLE_TX_QUEUE(mp
->port_num
);
2736 /* Finish Tx packet. Update first desc in case of Tx resource error */
2737 tx_desc_curr
= (tx_desc_curr
+ 1) % mp
->tx_ring_size
;
2739 /* Update the current descriptor */
2740 mp
->tx_curr_desc_q
= tx_desc_curr
;
2742 /* Check for ring index overlap in the Tx desc ring */
2743 if (tx_desc_curr
== tx_desc_used
) {
2744 mp
->tx_resource_err
= 1;
2746 spin_unlock_irqrestore(&mp
->lock
, flags
);
2747 return ETH_QUEUE_LAST_RESOURCE
;
2750 spin_unlock_irqrestore(&mp
->lock
, flags
);
2756 * eth_tx_return_desc - Free all used Tx descriptors
2759 * This routine returns the transmitted packet information to the caller.
2760 * It uses the 'first' index to support Tx desc return in case a transmit
2761 * of a packet spanned over multiple buffer still in process.
2762 * In case the Tx queue was in "resource error" condition, where there are
2763 * no available Tx resources, the function resets the resource error flag.
2766 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2767 * struct pkt_info *p_pkt_info User packet buffer.
2770 * Tx ring 'first' and 'used' indexes are updated.
2774 * ETH_ERROR otherwise.
2777 static ETH_FUNC_RET_STATUS
eth_tx_return_desc(struct mv643xx_private
*mp
,
2778 struct pkt_info
*p_pkt_info
)
2782 struct eth_tx_desc
*p_tx_desc_used
;
2783 unsigned int command_status
;
2784 unsigned long flags
;
2787 spin_lock_irqsave(&mp
->lock
, flags
);
2789 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
2790 tx_busy_desc
= mp
->tx_first_desc_q
;
2792 tx_busy_desc
= mp
->tx_curr_desc_q
;
2795 /* Get the Tx Desc ring indexes */
2796 tx_desc_used
= mp
->tx_used_desc_q
;
2798 p_tx_desc_used
= &mp
->p_tx_desc_area
[tx_desc_used
];
2801 if (p_tx_desc_used
== NULL
) {
2806 /* Stop release. About to overlap the current available Tx descriptor */
2807 if (tx_desc_used
== tx_busy_desc
&& !mp
->tx_resource_err
) {
2812 command_status
= p_tx_desc_used
->cmd_sts
;
2814 /* Still transmitting... */
2815 if (command_status
& (ETH_BUFFER_OWNED_BY_DMA
)) {
2820 /* Pass the packet information to the caller */
2821 p_pkt_info
->cmd_sts
= command_status
;
2822 p_pkt_info
->return_info
= mp
->tx_skb
[tx_desc_used
];
2823 p_pkt_info
->buf_ptr
= p_tx_desc_used
->buf_ptr
;
2824 p_pkt_info
->byte_cnt
= p_tx_desc_used
->byte_cnt
;
2825 mp
->tx_skb
[tx_desc_used
] = NULL
;
2827 /* Update the next descriptor to release. */
2828 mp
->tx_used_desc_q
= (tx_desc_used
+ 1) % mp
->tx_ring_size
;
2830 /* Any Tx return cancels the Tx resource error status */
2831 mp
->tx_resource_err
= 0;
2833 BUG_ON(mp
->tx_ring_skbs
== 0);
2837 spin_unlock_irqrestore(&mp
->lock
, flags
);
2843 * eth_port_receive - Get received information from Rx ring.
2846 * This routine returns the received data to the caller. There is no
2847 * data copying during routine operation. All information is returned
2848 * using pointer to packet information struct passed from the caller.
2849 * If the routine exhausts Rx ring resources then the resource error flag
2853 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2854 * struct pkt_info *p_pkt_info User packet buffer.
2857 * Rx ring current and used indexes are updated.
2860 * ETH_ERROR in case the routine can not access Rx desc ring.
2861 * ETH_QUEUE_FULL if Rx ring resources are exhausted.
2862 * ETH_END_OF_JOB if there is no received data.
2865 static ETH_FUNC_RET_STATUS
eth_port_receive(struct mv643xx_private
*mp
,
2866 struct pkt_info
*p_pkt_info
)
2868 int rx_next_curr_desc
, rx_curr_desc
, rx_used_desc
;
2869 volatile struct eth_rx_desc
*p_rx_desc
;
2870 unsigned int command_status
;
2871 unsigned long flags
;
2873 /* Do not process Rx ring in case of Rx ring resource error */
2874 if (mp
->rx_resource_err
)
2875 return ETH_QUEUE_FULL
;
2877 spin_lock_irqsave(&mp
->lock
, flags
);
2879 /* Get the Rx Desc ring 'curr and 'used' indexes */
2880 rx_curr_desc
= mp
->rx_curr_desc_q
;
2881 rx_used_desc
= mp
->rx_used_desc_q
;
2883 p_rx_desc
= &mp
->p_rx_desc_area
[rx_curr_desc
];
2885 /* The following parameters are used to save readings from memory */
2886 command_status
= p_rx_desc
->cmd_sts
;
2889 /* Nothing to receive... */
2890 if (command_status
& (ETH_BUFFER_OWNED_BY_DMA
)) {
2891 spin_unlock_irqrestore(&mp
->lock
, flags
);
2892 return ETH_END_OF_JOB
;
2895 p_pkt_info
->byte_cnt
= (p_rx_desc
->byte_cnt
) - RX_BUF_OFFSET
;
2896 p_pkt_info
->cmd_sts
= command_status
;
2897 p_pkt_info
->buf_ptr
= (p_rx_desc
->buf_ptr
) + RX_BUF_OFFSET
;
2898 p_pkt_info
->return_info
= mp
->rx_skb
[rx_curr_desc
];
2899 p_pkt_info
->l4i_chk
= p_rx_desc
->buf_size
;
2901 /* Clean the return info field to indicate that the packet has been */
2902 /* moved to the upper layers */
2903 mp
->rx_skb
[rx_curr_desc
] = NULL
;
2905 /* Update current index in data structure */
2906 rx_next_curr_desc
= (rx_curr_desc
+ 1) % mp
->rx_ring_size
;
2907 mp
->rx_curr_desc_q
= rx_next_curr_desc
;
2909 /* Rx descriptors exhausted. Set the Rx ring resource error flag */
2910 if (rx_next_curr_desc
== rx_used_desc
)
2911 mp
->rx_resource_err
= 1;
2913 spin_unlock_irqrestore(&mp
->lock
, flags
);
2919 * eth_rx_return_buff - Returns a Rx buffer back to the Rx ring.
2922 * This routine returns a Rx buffer back to the Rx ring. It retrieves the
2923 * next 'used' descriptor and attached the returned buffer to it.
2924 * In case the Rx ring was in "resource error" condition, where there are
2925 * no available Rx resources, the function resets the resource error flag.
2928 * struct mv643xx_private *mp Ethernet Port Control srtuct.
2929 * struct pkt_info *p_pkt_info Information on returned buffer.
2932 * New available Rx resource in Rx descriptor ring.
2935 * ETH_ERROR in case the routine can not access Rx desc ring.
2938 static ETH_FUNC_RET_STATUS
eth_rx_return_buff(struct mv643xx_private
*mp
,
2939 struct pkt_info
*p_pkt_info
)
2941 int used_rx_desc
; /* Where to return Rx resource */
2942 volatile struct eth_rx_desc
*p_used_rx_desc
;
2943 unsigned long flags
;
2945 spin_lock_irqsave(&mp
->lock
, flags
);
2947 /* Get 'used' Rx descriptor */
2948 used_rx_desc
= mp
->rx_used_desc_q
;
2949 p_used_rx_desc
= &mp
->p_rx_desc_area
[used_rx_desc
];
2951 p_used_rx_desc
->buf_ptr
= p_pkt_info
->buf_ptr
;
2952 p_used_rx_desc
->buf_size
= p_pkt_info
->byte_cnt
;
2953 mp
->rx_skb
[used_rx_desc
] = p_pkt_info
->return_info
;
2955 /* Flush the write pipe */
2957 /* Return the descriptor to DMA ownership */
2959 p_used_rx_desc
->cmd_sts
=
2960 ETH_BUFFER_OWNED_BY_DMA
| ETH_RX_ENABLE_INTERRUPT
;
2963 /* Move the used descriptor pointer to the next descriptor */
2964 mp
->rx_used_desc_q
= (used_rx_desc
+ 1) % mp
->rx_ring_size
;
2966 /* Any Rx return cancels the Rx resource error status */
2967 mp
->rx_resource_err
= 0;
2969 spin_unlock_irqrestore(&mp
->lock
, flags
);
2974 /************* Begin ethtool support *************************/
2976 struct mv643xx_stats
{
2977 char stat_string
[ETH_GSTRING_LEN
];
2982 #define MV643XX_STAT(m) sizeof(((struct mv643xx_private *)0)->m), \
2983 offsetof(struct mv643xx_private, m)
2985 static const struct mv643xx_stats mv643xx_gstrings_stats
[] = {
2986 { "rx_packets", MV643XX_STAT(stats
.rx_packets
) },
2987 { "tx_packets", MV643XX_STAT(stats
.tx_packets
) },
2988 { "rx_bytes", MV643XX_STAT(stats
.rx_bytes
) },
2989 { "tx_bytes", MV643XX_STAT(stats
.tx_bytes
) },
2990 { "rx_errors", MV643XX_STAT(stats
.rx_errors
) },
2991 { "tx_errors", MV643XX_STAT(stats
.tx_errors
) },
2992 { "rx_dropped", MV643XX_STAT(stats
.rx_dropped
) },
2993 { "tx_dropped", MV643XX_STAT(stats
.tx_dropped
) },
2994 { "good_octets_received", MV643XX_STAT(mib_counters
.good_octets_received
) },
2995 { "bad_octets_received", MV643XX_STAT(mib_counters
.bad_octets_received
) },
2996 { "internal_mac_transmit_err", MV643XX_STAT(mib_counters
.internal_mac_transmit_err
) },
2997 { "good_frames_received", MV643XX_STAT(mib_counters
.good_frames_received
) },
2998 { "bad_frames_received", MV643XX_STAT(mib_counters
.bad_frames_received
) },
2999 { "broadcast_frames_received", MV643XX_STAT(mib_counters
.broadcast_frames_received
) },
3000 { "multicast_frames_received", MV643XX_STAT(mib_counters
.multicast_frames_received
) },
3001 { "frames_64_octets", MV643XX_STAT(mib_counters
.frames_64_octets
) },
3002 { "frames_65_to_127_octets", MV643XX_STAT(mib_counters
.frames_65_to_127_octets
) },
3003 { "frames_128_to_255_octets", MV643XX_STAT(mib_counters
.frames_128_to_255_octets
) },
3004 { "frames_256_to_511_octets", MV643XX_STAT(mib_counters
.frames_256_to_511_octets
) },
3005 { "frames_512_to_1023_octets", MV643XX_STAT(mib_counters
.frames_512_to_1023_octets
) },
3006 { "frames_1024_to_max_octets", MV643XX_STAT(mib_counters
.frames_1024_to_max_octets
) },
3007 { "good_octets_sent", MV643XX_STAT(mib_counters
.good_octets_sent
) },
3008 { "good_frames_sent", MV643XX_STAT(mib_counters
.good_frames_sent
) },
3009 { "excessive_collision", MV643XX_STAT(mib_counters
.excessive_collision
) },
3010 { "multicast_frames_sent", MV643XX_STAT(mib_counters
.multicast_frames_sent
) },
3011 { "broadcast_frames_sent", MV643XX_STAT(mib_counters
.broadcast_frames_sent
) },
3012 { "unrec_mac_control_received", MV643XX_STAT(mib_counters
.unrec_mac_control_received
) },
3013 { "fc_sent", MV643XX_STAT(mib_counters
.fc_sent
) },
3014 { "good_fc_received", MV643XX_STAT(mib_counters
.good_fc_received
) },
3015 { "bad_fc_received", MV643XX_STAT(mib_counters
.bad_fc_received
) },
3016 { "undersize_received", MV643XX_STAT(mib_counters
.undersize_received
) },
3017 { "fragments_received", MV643XX_STAT(mib_counters
.fragments_received
) },
3018 { "oversize_received", MV643XX_STAT(mib_counters
.oversize_received
) },
3019 { "jabber_received", MV643XX_STAT(mib_counters
.jabber_received
) },
3020 { "mac_receive_error", MV643XX_STAT(mib_counters
.mac_receive_error
) },
3021 { "bad_crc_event", MV643XX_STAT(mib_counters
.bad_crc_event
) },
3022 { "collision", MV643XX_STAT(mib_counters
.collision
) },
3023 { "late_collision", MV643XX_STAT(mib_counters
.late_collision
) },
3026 #define MV643XX_STATS_LEN \
3027 sizeof(mv643xx_gstrings_stats) / sizeof(struct mv643xx_stats)
3030 mv643xx_get_settings(struct net_device
*netdev
, struct ethtool_cmd
*ecmd
)
3032 struct mv643xx_private
*mp
= netdev
->priv
;
3033 int port_num
= mp
->port_num
;
3034 int autoneg
= eth_port_autoneg_supported(port_num
);
3037 int half_duplex
= 0;
3038 int full_duplex
= 0;
3044 u32 pcs
= mv_read(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(port_num
));
3045 u32 psr
= mv_read(MV643XX_ETH_PORT_STATUS_REG(port_num
));
3047 mode_10_bit
= psr
& MV643XX_ETH_PORT_STATUS_MODE_10_BIT
;
3050 ecmd
->supported
= SUPPORTED_10baseT_Half
;
3052 ecmd
->supported
= (SUPPORTED_10baseT_Half
|
3053 SUPPORTED_10baseT_Full
|
3054 SUPPORTED_100baseT_Half
|
3055 SUPPORTED_100baseT_Full
|
3056 SUPPORTED_1000baseT_Full
|
3057 (autoneg
? SUPPORTED_Autoneg
: 0) |
3060 auto_duplex
= !(pcs
& MV643XX_ETH_DISABLE_AUTO_NEG_FOR_DUPLX
);
3061 auto_speed
= !(pcs
& MV643XX_ETH_DISABLE_AUTO_NEG_SPEED_GMII
);
3063 ecmd
->advertising
= ADVERTISED_TP
;
3066 ecmd
->advertising
|= ADVERTISED_Autoneg
;
3072 if (pcs
& MV643XX_ETH_SET_FULL_DUPLEX_MODE
)
3083 if (pcs
& MV643XX_ETH_SET_GMII_SPEED_TO_1000
)
3085 else if (pcs
& MV643XX_ETH_SET_MII_SPEED_TO_100
)
3091 if (speed_10
& half_duplex
)
3092 ecmd
->advertising
|= ADVERTISED_10baseT_Half
;
3093 if (speed_10
& full_duplex
)
3094 ecmd
->advertising
|= ADVERTISED_10baseT_Full
;
3095 if (speed_100
& half_duplex
)
3096 ecmd
->advertising
|= ADVERTISED_100baseT_Half
;
3097 if (speed_100
& full_duplex
)
3098 ecmd
->advertising
|= ADVERTISED_100baseT_Full
;
3100 ecmd
->advertising
|= ADVERTISED_1000baseT_Full
;
3104 ecmd
->port
= PORT_TP
;
3105 ecmd
->phy_address
= ethernet_phy_get(port_num
);
3107 ecmd
->transceiver
= XCVR_EXTERNAL
;
3109 if (netif_carrier_ok(netdev
)) {
3111 ecmd
->speed
= SPEED_10
;
3113 if (psr
& MV643XX_ETH_PORT_STATUS_GMII_1000
)
3114 ecmd
->speed
= SPEED_1000
;
3115 else if (psr
& MV643XX_ETH_PORT_STATUS_MII_100
)
3116 ecmd
->speed
= SPEED_100
;
3118 ecmd
->speed
= SPEED_10
;
3121 if (psr
& MV643XX_ETH_PORT_STATUS_FULL_DUPLEX
)
3122 ecmd
->duplex
= DUPLEX_FULL
;
3124 ecmd
->duplex
= DUPLEX_HALF
;
3130 ecmd
->autoneg
= autoneg
? AUTONEG_ENABLE
: AUTONEG_DISABLE
;
3135 mv643xx_get_drvinfo(struct net_device
*netdev
,
3136 struct ethtool_drvinfo
*drvinfo
)
3138 strncpy(drvinfo
->driver
, mv643xx_driver_name
, 32);
3139 strncpy(drvinfo
->version
, mv643xx_driver_version
, 32);
3140 strncpy(drvinfo
->fw_version
, "N/A", 32);
3141 strncpy(drvinfo
->bus_info
, "mv643xx", 32);
3142 drvinfo
->n_stats
= MV643XX_STATS_LEN
;
3146 mv643xx_get_stats_count(struct net_device
*netdev
)
3148 return MV643XX_STATS_LEN
;
3152 mv643xx_get_ethtool_stats(struct net_device
*netdev
,
3153 struct ethtool_stats
*stats
, uint64_t *data
)
3155 struct mv643xx_private
*mp
= netdev
->priv
;
3158 eth_update_mib_counters(mp
);
3160 for(i
= 0; i
< MV643XX_STATS_LEN
; i
++) {
3161 char *p
= (char *)mp
+mv643xx_gstrings_stats
[i
].stat_offset
;
3162 data
[i
] = (mv643xx_gstrings_stats
[i
].sizeof_stat
==
3163 sizeof(uint64_t)) ? *(uint64_t *)p
: *(uint32_t *)p
;
3168 mv643xx_get_strings(struct net_device
*netdev
, uint32_t stringset
, uint8_t *data
)
3174 for (i
=0; i
< MV643XX_STATS_LEN
; i
++) {
3175 memcpy(data
+ i
* ETH_GSTRING_LEN
,
3176 mv643xx_gstrings_stats
[i
].stat_string
,
3183 static struct ethtool_ops mv643xx_ethtool_ops
= {
3184 .get_settings
= mv643xx_get_settings
,
3185 .get_drvinfo
= mv643xx_get_drvinfo
,
3186 .get_link
= ethtool_op_get_link
,
3187 .get_sg
= ethtool_op_get_sg
,
3188 .set_sg
= ethtool_op_set_sg
,
3189 .get_strings
= mv643xx_get_strings
,
3190 .get_stats_count
= mv643xx_get_stats_count
,
3191 .get_ethtool_stats
= mv643xx_get_ethtool_stats
,
3194 /************* End ethtool support *************************/