2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; version 2 of the License
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
15 * Copyright (C) 2009-2013 John Crispin <blogic@openwrt.org>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/init.h>
23 #include <linux/skbuff.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/platform_device.h>
27 #include <linux/of_device.h>
28 #include <linux/clk.h>
29 #include <linux/of_net.h>
30 #include <linux/of_mdio.h>
31 #include <linux/if_vlan.h>
32 #include <linux/reset.h>
33 #include <linux/tcp.h>
36 #include <asm/mach-ralink/ralink_regs.h>
38 #include "ralink_soc_eth.h"
39 #include "esw_rt3052.h"
41 #include "ralink_ethtool.h"
43 #define TX_TIMEOUT (2 * HZ)
44 #define MAX_RX_LENGTH 1536
45 #define FE_RX_OFFSET (NET_SKB_PAD + NET_IP_ALIGN)
46 #define FE_RX_HLEN (FE_RX_OFFSET + VLAN_ETH_HLEN + VLAN_HLEN + \
48 #define DMA_DUMMY_DESC 0xffffffff
49 #define FE_DEFAULT_MSG_ENABLE \
59 #define TX_DMA_DESP2_DEF (TX_DMA_LS0 | TX_DMA_DONE)
60 #define TX_DMA_DESP4_DEF (TX_DMA_QN(3) | TX_DMA_PN(1))
61 #define NEXT_TX_DESP_IDX(X) (((X) + 1) & (NUM_DMA_DESC - 1))
62 #define NEXT_RX_DESP_IDX(X) (((X) + 1) & (NUM_DMA_DESC - 1))
64 static int fe_msg_level
= -1;
65 module_param_named(msg_level
, fe_msg_level
, int, 0);
66 MODULE_PARM_DESC(msg_level
, "Message level (-1=defaults,0=none,...,16=all)");
68 static const u32 fe_reg_table_default
[FE_REG_COUNT
] = {
69 [FE_REG_PDMA_GLO_CFG
] = FE_PDMA_GLO_CFG
,
70 [FE_REG_PDMA_RST_CFG
] = FE_PDMA_RST_CFG
,
71 [FE_REG_DLY_INT_CFG
] = FE_DLY_INT_CFG
,
72 [FE_REG_TX_BASE_PTR0
] = FE_TX_BASE_PTR0
,
73 [FE_REG_TX_MAX_CNT0
] = FE_TX_MAX_CNT0
,
74 [FE_REG_TX_CTX_IDX0
] = FE_TX_CTX_IDX0
,
75 [FE_REG_RX_BASE_PTR0
] = FE_RX_BASE_PTR0
,
76 [FE_REG_RX_MAX_CNT0
] = FE_RX_MAX_CNT0
,
77 [FE_REG_RX_CALC_IDX0
] = FE_RX_CALC_IDX0
,
78 [FE_REG_FE_INT_ENABLE
] = FE_FE_INT_ENABLE
,
79 [FE_REG_FE_INT_STATUS
] = FE_FE_INT_STATUS
,
80 [FE_REG_FE_DMA_VID_BASE
] = FE_DMA_VID0
,
81 [FE_REG_FE_COUNTER_BASE
] = FE_GDMA1_TX_GBCNT
,
82 [FE_REG_FE_RST_GL
] = FE_FE_RST_GL
,
85 static const u32
*fe_reg_table
= fe_reg_table_default
;
87 static void __iomem
*fe_base
= 0;
89 void fe_w32(u32 val
, unsigned reg
)
91 __raw_writel(val
, fe_base
+ reg
);
94 u32
fe_r32(unsigned reg
)
96 return __raw_readl(fe_base
+ reg
);
99 void fe_reg_w32(u32 val
, enum fe_reg reg
)
101 fe_w32(val
, fe_reg_table
[reg
]);
104 u32
fe_reg_r32(enum fe_reg reg
)
106 return fe_r32(fe_reg_table
[reg
]);
109 static inline void fe_int_disable(u32 mask
)
111 fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE
) & ~mask
,
112 FE_REG_FE_INT_ENABLE
);
114 fe_reg_r32(FE_REG_FE_INT_ENABLE
);
117 static inline void fe_int_enable(u32 mask
)
119 fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE
) | mask
,
120 FE_REG_FE_INT_ENABLE
);
122 fe_reg_r32(FE_REG_FE_INT_ENABLE
);
125 static inline void fe_hw_set_macaddr(struct fe_priv
*priv
, unsigned char *mac
)
129 spin_lock_irqsave(&priv
->page_lock
, flags
);
130 fe_w32((mac
[0] << 8) | mac
[1], FE_GDMA1_MAC_ADRH
);
131 fe_w32((mac
[2] << 24) | (mac
[3] << 16) | (mac
[4] << 8) | mac
[5],
133 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
136 static int fe_set_mac_address(struct net_device
*dev
, void *p
)
138 int ret
= eth_mac_addr(dev
, p
);
141 struct fe_priv
*priv
= netdev_priv(dev
);
143 if (priv
->soc
->set_mac
)
144 priv
->soc
->set_mac(priv
, dev
->dev_addr
);
146 fe_hw_set_macaddr(priv
, p
);
152 static inline int fe_max_frag_size(int mtu
)
154 return SKB_DATA_ALIGN(FE_RX_HLEN
+ mtu
) +
155 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
158 static inline int fe_max_buf_size(int frag_size
)
160 return frag_size
- FE_RX_HLEN
-
161 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
164 static void fe_clean_rx(struct fe_priv
*priv
)
169 for (i
= 0; i
< NUM_DMA_DESC
; i
++)
170 if (priv
->rx_data
[i
]) {
171 if (priv
->rx_dma
&& priv
->rx_dma
[i
].rxd1
)
172 dma_unmap_single(&priv
->netdev
->dev
,
173 priv
->rx_dma
[i
].rxd1
,
176 put_page(virt_to_head_page(priv
->rx_data
[i
]));
179 kfree(priv
->rx_data
);
180 priv
->rx_data
= NULL
;
184 dma_free_coherent(&priv
->netdev
->dev
,
185 NUM_DMA_DESC
* sizeof(*priv
->rx_dma
),
192 static int fe_alloc_rx(struct fe_priv
*priv
)
194 struct net_device
*netdev
= priv
->netdev
;
197 priv
->rx_data
= kcalloc(NUM_DMA_DESC
, sizeof(*priv
->rx_data
),
202 for (i
= 0; i
< NUM_DMA_DESC
; i
++) {
203 priv
->rx_data
[i
] = netdev_alloc_frag(priv
->frag_size
);
204 if (!priv
->rx_data
[i
])
208 priv
->rx_dma
= dma_alloc_coherent(&netdev
->dev
,
209 NUM_DMA_DESC
* sizeof(*priv
->rx_dma
),
211 GFP_ATOMIC
| __GFP_ZERO
);
215 for (i
= 0; i
< NUM_DMA_DESC
; i
++) {
216 dma_addr_t dma_addr
= dma_map_single(&netdev
->dev
,
217 priv
->rx_data
[i
] + FE_RX_OFFSET
,
220 if (unlikely(dma_mapping_error(&netdev
->dev
, dma_addr
)))
222 priv
->rx_dma
[i
].rxd1
= (unsigned int) dma_addr
;
224 if (priv
->soc
->rx_dma
)
225 priv
->soc
->rx_dma(priv
, i
, priv
->rx_buf_size
);
227 priv
->rx_dma
[i
].rxd2
= RX_DMA_LSO
;
231 fe_reg_w32(priv
->rx_phys
, FE_REG_RX_BASE_PTR0
);
232 fe_reg_w32(NUM_DMA_DESC
, FE_REG_RX_MAX_CNT0
);
233 fe_reg_w32((NUM_DMA_DESC
- 1), FE_REG_RX_CALC_IDX0
);
234 fe_reg_w32(FE_PST_DRX_IDX0
, FE_REG_PDMA_RST_CFG
);
242 static void fe_clean_tx(struct fe_priv
*priv
)
247 for (i
= 0; i
< NUM_DMA_DESC
; i
++) {
249 dev_kfree_skb_any(priv
->tx_skb
[i
]);
256 dma_free_coherent(&priv
->netdev
->dev
,
257 NUM_DMA_DESC
* sizeof(*priv
->tx_dma
),
264 static int fe_alloc_tx(struct fe_priv
*priv
)
268 priv
->tx_free_idx
= 0;
270 priv
->tx_skb
= kcalloc(NUM_DMA_DESC
, sizeof(*priv
->tx_skb
),
275 priv
->tx_dma
= dma_alloc_coherent(&priv
->netdev
->dev
,
276 NUM_DMA_DESC
* sizeof(*priv
->tx_dma
),
278 GFP_ATOMIC
| __GFP_ZERO
);
282 for (i
= 0; i
< NUM_DMA_DESC
; i
++) {
283 if (priv
->soc
->tx_dma
) {
284 priv
->soc
->tx_dma(priv
, i
, NULL
);
287 priv
->tx_dma
[i
].txd2
= TX_DMA_DESP2_DEF
;
291 fe_reg_w32(priv
->tx_phys
, FE_REG_TX_BASE_PTR0
);
292 fe_reg_w32(NUM_DMA_DESC
, FE_REG_TX_MAX_CNT0
);
293 fe_reg_w32(0, FE_REG_TX_CTX_IDX0
);
294 fe_reg_w32(FE_PST_DTX_IDX0
, FE_REG_PDMA_RST_CFG
);
302 static int fe_init_dma(struct fe_priv
*priv
)
306 err
= fe_alloc_tx(priv
);
310 err
= fe_alloc_rx(priv
);
317 static void fe_free_dma(struct fe_priv
*priv
)
322 netdev_reset_queue(priv
->netdev
);
325 static inline void txd_unmap_single(struct device
*dev
, struct fe_tx_dma
*txd
)
327 if (txd
->txd1
&& TX_DMA_GET_PLEN0(txd
->txd2
))
328 dma_unmap_single(dev
, txd
->txd1
,
329 TX_DMA_GET_PLEN0(txd
->txd2
),
333 static inline void txd_unmap_page0(struct device
*dev
, struct fe_tx_dma
*txd
)
335 if (txd
->txd1
&& TX_DMA_GET_PLEN0(txd
->txd2
))
336 dma_unmap_page(dev
, txd
->txd1
,
337 TX_DMA_GET_PLEN0(txd
->txd2
),
341 static inline void txd_unmap_page1(struct device
*dev
, struct fe_tx_dma
*txd
)
343 if (txd
->txd3
&& TX_DMA_GET_PLEN1(txd
->txd2
))
344 dma_unmap_page(dev
, txd
->txd3
,
345 TX_DMA_GET_PLEN1(txd
->txd2
),
349 void fe_stats_update(struct fe_priv
*priv
)
351 struct fe_hw_stats
*hwstats
= priv
->hw_stats
;
352 unsigned int base
= fe_reg_table
[FE_REG_FE_COUNTER_BASE
];
354 u64_stats_update_begin(&hwstats
->syncp
);
356 hwstats
->tx_bytes
+= fe_r32(base
);
357 hwstats
->tx_packets
+= fe_r32(base
+ 0x04);
358 hwstats
->tx_skip
+= fe_r32(base
+ 0x08);
359 hwstats
->tx_collisions
+= fe_r32(base
+ 0x0c);
360 hwstats
->rx_bytes
+= fe_r32(base
+ 0x20);
361 hwstats
->rx_packets
+= fe_r32(base
+ 0x24);
362 hwstats
->rx_overflow
+= fe_r32(base
+ 0x28);
363 hwstats
->rx_fcs_errors
+= fe_r32(base
+ 0x2c);
364 hwstats
->rx_short_errors
+= fe_r32(base
+ 0x30);
365 hwstats
->rx_long_errors
+= fe_r32(base
+ 0x34);
366 hwstats
->rx_checksum_errors
+= fe_r32(base
+ 0x38);
367 hwstats
->rx_flow_control_packets
+= fe_r32(base
+ 0x3c);
369 u64_stats_update_end(&hwstats
->syncp
);
372 static struct rtnl_link_stats64
*fe_get_stats64(struct net_device
*dev
,
373 struct rtnl_link_stats64
*storage
)
375 struct fe_priv
*priv
= netdev_priv(dev
);
376 struct fe_hw_stats
*hwstats
= priv
->hw_stats
;
377 unsigned int base
= fe_reg_table
[FE_REG_FE_COUNTER_BASE
];
381 netdev_stats_to_stats64(storage
, &dev
->stats
);
385 if (netif_running(dev
) && netif_device_present(dev
)) {
386 if (spin_trylock(&hwstats
->stats_lock
)) {
387 fe_stats_update(priv
);
388 spin_unlock(&hwstats
->stats_lock
);
393 start
= u64_stats_fetch_begin_bh(&hwstats
->syncp
);
394 if (IS_ENABLED(CONFIG_SOC_MT7621
)) {
395 storage
->rx_packets
= dev
->stats
.rx_packets
;
396 storage
->tx_packets
= dev
->stats
.tx_packets
;
397 storage
->rx_bytes
= dev
->stats
.rx_bytes
;
398 storage
->tx_bytes
= dev
->stats
.tx_bytes
;
400 storage
->rx_packets
= dev
->stats
.rx_packets
;
401 storage
->tx_packets
= dev
->stats
.tx_packets
;
402 storage
->rx_bytes
= dev
->stats
.rx_bytes
;
403 storage
->tx_bytes
= dev
->stats
.tx_bytes
;
405 storage
->collisions
= hwstats
->tx_collisions
;
406 storage
->rx_length_errors
= hwstats
->rx_short_errors
+
407 hwstats
->rx_long_errors
;
408 storage
->rx_over_errors
= hwstats
->rx_overflow
;
409 storage
->rx_crc_errors
= hwstats
->rx_fcs_errors
;
410 storage
->rx_errors
= hwstats
->rx_checksum_errors
;
411 storage
->tx_aborted_errors
= hwstats
->tx_skip
;
412 } while (u64_stats_fetch_retry_bh(&hwstats
->syncp
, start
));
414 storage
->tx_errors
= priv
->netdev
->stats
.tx_errors
;
415 storage
->rx_dropped
= priv
->netdev
->stats
.rx_dropped
;
416 storage
->tx_dropped
= priv
->netdev
->stats
.tx_dropped
;
421 static int fe_vlan_rx_add_vid(struct net_device
*dev
,
422 __be16 proto
, u16 vid
)
424 struct fe_priv
*priv
= netdev_priv(dev
);
425 u32 idx
= (vid
& 0xf);
428 if (!((fe_reg_table
[FE_REG_FE_DMA_VID_BASE
]) &&
429 (dev
->features
| NETIF_F_HW_VLAN_CTAG_TX
)))
432 if (test_bit(idx
, &priv
->vlan_map
)) {
433 netdev_warn(dev
, "disable tx vlan offload\n");
434 dev
->wanted_features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
435 netdev_update_features(dev
);
437 vlan_cfg
= fe_r32(fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
441 vlan_cfg
|= (vid
<< 16);
443 vlan_cfg
&= 0xffff0000;
446 fe_w32(vlan_cfg
, fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
448 set_bit(idx
, &priv
->vlan_map
);
454 static int fe_vlan_rx_kill_vid(struct net_device
*dev
,
455 __be16 proto
, u16 vid
)
457 struct fe_priv
*priv
= netdev_priv(dev
);
458 u32 idx
= (vid
& 0xf);
460 if (!((fe_reg_table
[FE_REG_FE_DMA_VID_BASE
]) &&
461 (dev
->features
| NETIF_F_HW_VLAN_CTAG_TX
)))
464 clear_bit(idx
, &priv
->vlan_map
);
469 static int fe_tx_map_dma(struct sk_buff
*skb
, struct net_device
*dev
,
472 struct fe_priv
*priv
= netdev_priv(dev
);
473 struct skb_frag_struct
*frag
;
474 struct fe_tx_dma
*txd
;
475 dma_addr_t mapped_addr
;
476 unsigned int nr_frags
;
478 int i
, j
, unmap_idx
, tx_num
;
480 txd
= &priv
->tx_dma
[idx
];
481 nr_frags
= skb_shinfo(skb
)->nr_frags
;
482 tx_num
= 1 + (nr_frags
>> 1);
484 /* init tx descriptor */
485 if (priv
->soc
->tx_dma
)
486 priv
->soc
->tx_dma(priv
, idx
, skb
);
488 txd
->txd4
= TX_DMA_DESP4_DEF
;
489 def_txd4
= txd
->txd4
;
491 /* use dma_unmap_single to free it */
492 txd
->txd4
|= priv
->soc
->tx_udf_bit
;
494 /* TX Checksum offload */
495 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
496 txd
->txd4
|= TX_DMA_CHKSUM
;
498 /* VLAN header offload */
499 if (vlan_tx_tag_present(skb
)) {
500 if (IS_ENABLED(CONFIG_SOC_MT7620
))
501 txd
->txd4
|= TX_DMA_INS_VLAN
|
502 ((vlan_tx_tag_get(skb
) >> VLAN_PRIO_SHIFT
) << 4) |
503 (vlan_tx_tag_get(skb
) & 0xF);
505 txd
->txd4
|= TX_DMA_INS_VLAN_MT7621
| vlan_tx_tag_get(skb
);
508 /* TSO: fill MSS info in tcp checksum field */
509 if (skb_is_gso(skb
)) {
510 if (skb_cow_head(skb
, 0)) {
511 netif_warn(priv
, tx_err
, dev
,
512 "GSO expand head fail.\n");
515 if (skb_shinfo(skb
)->gso_type
&
516 (SKB_GSO_TCPV4
| SKB_GSO_TCPV6
)) {
517 txd
->txd4
|= TX_DMA_TSO
;
518 tcp_hdr(skb
)->check
= htons(skb_shinfo(skb
)->gso_size
);
522 mapped_addr
= dma_map_single(&dev
->dev
, skb
->data
,
523 skb_headlen(skb
), DMA_TO_DEVICE
);
524 if (unlikely(dma_mapping_error(&dev
->dev
, mapped_addr
)))
526 txd
->txd1
= mapped_addr
;
527 txd2
= TX_DMA_PLEN0(skb_headlen(skb
));
531 for (i
= 0; i
< nr_frags
; i
++) {
533 frag
= &skb_shinfo(skb
)->frags
[i
];
534 mapped_addr
= skb_frag_dma_map(&dev
->dev
, frag
, 0,
535 skb_frag_size(frag
), DMA_TO_DEVICE
);
536 if (unlikely(dma_mapping_error(&dev
->dev
, mapped_addr
)))
540 j
= NEXT_TX_DESP_IDX(j
);
541 txd
= &priv
->tx_dma
[j
];
542 txd
->txd1
= mapped_addr
;
543 txd2
= TX_DMA_PLEN0(frag
->size
);
544 txd
->txd4
= def_txd4
;
546 txd
->txd3
= mapped_addr
;
547 txd2
|= TX_DMA_PLEN1(frag
->size
);
548 if (i
!= (nr_frags
-1))
550 priv
->tx_skb
[j
] = (struct sk_buff
*) DMA_DUMMY_DESC
;
554 /* set last segment */
556 txd
->txd2
= (txd2
| TX_DMA_LS1
);
558 txd
->txd2
= (txd2
| TX_DMA_LS0
);
560 /* store skb to cleanup */
561 priv
->tx_skb
[j
] = skb
;
564 j
= NEXT_TX_DESP_IDX(j
);
565 fe_reg_w32(j
, FE_REG_TX_CTX_IDX0
);
571 txd
= &priv
->tx_dma
[idx
];
572 txd_unmap_single(&dev
->dev
, txd
);
576 for (i
= 0; i
< unmap_idx
; i
++) {
578 j
= NEXT_TX_DESP_IDX(j
);
579 txd
= &priv
->tx_dma
[j
];
580 txd_unmap_page0(&dev
->dev
, txd
);
582 txd_unmap_page1(&dev
->dev
, txd
);
587 /* reinit descriptors and skb */
589 for (i
= 0; i
< tx_num
; i
++) {
590 priv
->tx_dma
[j
].txd2
= TX_DMA_DESP2_DEF
;
591 priv
->tx_skb
[j
] = NULL
;
592 j
= NEXT_TX_DESP_IDX(j
);
599 static inline int fe_skb_padto(struct sk_buff
*skb
, struct fe_priv
*priv
) {
604 if (unlikely(skb
->len
< VLAN_ETH_ZLEN
)) {
605 if ((priv
->flags
& FE_FLAG_PADDING_64B
) &&
606 !(priv
->flags
& FE_FLAG_PADDING_BUG
))
609 if (vlan_tx_tag_present(skb
))
611 else if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
613 else if(!(priv
->flags
& FE_FLAG_PADDING_64B
))
618 if (skb
->len
< len
) {
619 if ((ret
= skb_pad(skb
, len
- skb
->len
)) < 0)
622 skb_set_tail_pointer(skb
, len
);
629 static inline u32
fe_empty_txd(struct fe_priv
*priv
, u32 tx_fill_idx
)
631 return (u32
)(NUM_DMA_DESC
- ((tx_fill_idx
- priv
->tx_free_idx
) &
632 (NUM_DMA_DESC
- 1)));
635 static int fe_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
637 struct fe_priv
*priv
= netdev_priv(dev
);
638 struct net_device_stats
*stats
= &dev
->stats
;
642 if (fe_skb_padto(skb
, priv
)) {
643 netif_warn(priv
, tx_err
, dev
, "tx padding failed!\n");
647 spin_lock(&priv
->page_lock
);
648 tx_num
= 1 + (skb_shinfo(skb
)->nr_frags
>> 1);
649 tx
= fe_reg_r32(FE_REG_TX_CTX_IDX0
);
650 if (unlikely(fe_empty_txd(priv
, tx
) <= tx_num
))
652 netif_stop_queue(dev
);
653 spin_unlock(&priv
->page_lock
);
654 netif_err(priv
, tx_queued
,dev
,
655 "Tx Ring full when queue awake!\n");
656 return NETDEV_TX_BUSY
;
659 if (fe_tx_map_dma(skb
, dev
, tx
) < 0) {
664 netdev_sent_queue(dev
, skb
->len
);
665 skb_tx_timestamp(skb
);
668 stats
->tx_bytes
+= skb
->len
;
671 spin_unlock(&priv
->page_lock
);
676 static inline void fe_rx_vlan(struct sk_buff
*skb
)
681 if (!__vlan_get_tag(skb
, &vlanid
)) {
682 /* pop the vlan tag */
683 ehdr
= (struct ethhdr
*)skb
->data
;
684 memmove(skb
->data
+ VLAN_HLEN
, ehdr
, ETH_ALEN
* 2);
685 skb_pull(skb
, VLAN_HLEN
);
686 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vlanid
);
690 static int fe_poll_rx(struct napi_struct
*napi
, int budget
,
691 struct fe_priv
*priv
)
693 struct net_device
*netdev
= priv
->netdev
;
694 struct net_device_stats
*stats
= &netdev
->stats
;
695 struct fe_soc_data
*soc
= priv
->soc
;
697 int idx
= fe_reg_r32(FE_REG_RX_CALC_IDX0
);
700 struct fe_rx_dma
*rxd
;
702 bool rx_vlan
= netdev
->features
& NETIF_F_HW_VLAN_CTAG_RX
;
704 if (netdev
->features
& NETIF_F_RXCSUM
)
705 checksum_bit
= soc
->checksum_bit
;
709 while (done
< budget
) {
712 idx
= NEXT_RX_DESP_IDX(idx
);
713 rxd
= &priv
->rx_dma
[idx
];
714 data
= priv
->rx_data
[idx
];
716 if (!(rxd
->rxd2
& RX_DMA_DONE
))
719 /* alloc new buffer */
720 new_data
= netdev_alloc_frag(priv
->frag_size
);
721 if (unlikely(!new_data
)) {
725 dma_addr
= dma_map_single(&netdev
->dev
,
726 new_data
+ FE_RX_OFFSET
,
729 if (unlikely(dma_mapping_error(&netdev
->dev
, dma_addr
))) {
730 put_page(virt_to_head_page(new_data
));
735 skb
= build_skb(data
, priv
->frag_size
);
736 if (unlikely(!skb
)) {
737 put_page(virt_to_head_page(new_data
));
740 skb_reserve(skb
, FE_RX_OFFSET
);
742 dma_unmap_single(&netdev
->dev
, rxd
->rxd1
,
743 priv
->rx_buf_size
, DMA_FROM_DEVICE
);
744 pktlen
= RX_DMA_PLEN0(rxd
->rxd2
);
745 skb_put(skb
, pktlen
);
747 if (rxd
->rxd4
& checksum_bit
) {
748 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
750 skb_checksum_none_assert(skb
);
754 skb
->protocol
= eth_type_trans(skb
, netdev
);
757 stats
->rx_bytes
+= pktlen
;
759 napi_gro_receive(napi
, skb
);
761 priv
->rx_data
[idx
] = new_data
;
762 rxd
->rxd1
= (unsigned int) dma_addr
;
766 soc
->rx_dma(priv
, idx
, priv
->rx_buf_size
);
768 rxd
->rxd2
= RX_DMA_LSO
;
771 fe_reg_w32(idx
, FE_REG_RX_CALC_IDX0
);
778 static int fe_poll_tx(struct fe_priv
*priv
, int budget
)
780 struct net_device
*netdev
= priv
->netdev
;
781 struct device
*dev
= &netdev
->dev
;
782 unsigned int bytes_compl
= 0;
784 struct fe_tx_dma
*txd
;
786 u32 udf_bit
= priv
->soc
->tx_udf_bit
;
788 idx
= priv
->tx_free_idx
;
789 while (done
< budget
) {
790 txd
= &priv
->tx_dma
[idx
];
791 skb
= priv
->tx_skb
[idx
];
793 if (!(txd
->txd2
& TX_DMA_DONE
) || !skb
)
796 txd_unmap_page1(dev
, txd
);
798 if (txd
->txd4
& udf_bit
)
799 txd_unmap_single(dev
, txd
);
801 txd_unmap_page0(dev
, txd
);
803 if (skb
!= (struct sk_buff
*) DMA_DUMMY_DESC
) {
804 bytes_compl
+= skb
->len
;
805 dev_kfree_skb_any(skb
);
808 priv
->tx_skb
[idx
] = NULL
;
809 idx
= NEXT_TX_DESP_IDX(idx
);
811 priv
->tx_free_idx
= idx
;
816 netdev_completed_queue(netdev
, done
, bytes_compl
);
817 if (unlikely(netif_queue_stopped(netdev
) &&
818 netif_carrier_ok(netdev
))) {
819 netif_wake_queue(netdev
);
825 static int fe_poll(struct napi_struct
*napi
, int budget
)
827 struct fe_priv
*priv
= container_of(napi
, struct fe_priv
, rx_napi
);
828 struct fe_hw_stats
*hwstat
= priv
->hw_stats
;
829 int tx_done
, rx_done
;
831 u32 tx_intr
, rx_intr
;
833 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
834 tx_intr
= priv
->soc
->tx_dly_int
;
835 rx_intr
= priv
->soc
->rx_dly_int
;
836 tx_done
= rx_done
= 0;
839 if (status
& tx_intr
) {
840 tx_done
+= fe_poll_tx(priv
, budget
- tx_done
);
841 if (tx_done
< budget
) {
842 fe_reg_w32(tx_intr
, FE_REG_FE_INT_STATUS
);
844 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
847 if (status
& rx_intr
) {
848 rx_done
+= fe_poll_rx(napi
, budget
- rx_done
, priv
);
849 if (rx_done
< budget
) {
850 fe_reg_w32(rx_intr
, FE_REG_FE_INT_STATUS
);
854 if (unlikely(hwstat
&& (status
& FE_CNT_GDM_AF
))) {
855 if (spin_trylock(&hwstat
->stats_lock
)) {
856 fe_stats_update(priv
);
857 spin_unlock(&hwstat
->stats_lock
);
859 fe_reg_w32(FE_CNT_GDM_AF
, FE_REG_FE_INT_STATUS
);
862 if (unlikely(netif_msg_intr(priv
))) {
863 mask
= fe_reg_r32(FE_REG_FE_INT_ENABLE
);
864 netdev_info(priv
->netdev
,
865 "done tx %d, rx %d, intr 0x%x/0x%x\n",
866 tx_done
, rx_done
, status
, mask
);
869 if ((tx_done
< budget
) && (rx_done
< budget
)) {
870 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
871 if (status
& (tx_intr
| rx_intr
)) {
875 fe_int_enable(tx_intr
| rx_intr
);
881 static void fe_tx_timeout(struct net_device
*dev
)
883 struct fe_priv
*priv
= netdev_priv(dev
);
885 priv
->netdev
->stats
.tx_errors
++;
886 netif_err(priv
, tx_err
, dev
,
887 "transmit timed out, waking up the queue\n");
888 netif_info(priv
, drv
, dev
, ": dma_cfg:%08x, free_idx:%d, " \
889 "dma_ctx_idx=%u, dma_crx_idx=%u\n",
890 fe_reg_r32(FE_REG_PDMA_GLO_CFG
), priv
->tx_free_idx
,
891 fe_reg_r32(FE_REG_TX_CTX_IDX0
),
892 fe_reg_r32(FE_REG_RX_CALC_IDX0
));
893 netif_wake_queue(dev
);
896 static irqreturn_t
fe_handle_irq(int irq
, void *dev
)
898 struct fe_priv
*priv
= netdev_priv(dev
);
901 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
903 if (unlikely(!status
))
906 dly_int
= (priv
->soc
->rx_dly_int
| priv
->soc
->tx_dly_int
);
907 if (likely(status
& dly_int
)) {
908 fe_int_disable(dly_int
);
909 napi_schedule(&priv
->rx_napi
);
911 fe_reg_w32(status
, FE_REG_FE_INT_STATUS
);
917 #ifdef CONFIG_NET_POLL_CONTROLLER
918 static void fe_poll_controller(struct net_device
*dev
)
920 struct fe_priv
*priv
= netdev_priv(dev
);
921 u32 dly_int
= priv
->soc
->tx_dly_int
| priv
->soc
->rx_dly_int
;
923 fe_int_disable(dly_int
);
924 fe_handle_irq(dev
->irq
, dev
);
925 fe_int_enable(dly_int
);
929 int fe_set_clock_cycle(struct fe_priv
*priv
)
931 unsigned long sysclk
= priv
->sysclk
;
937 sysclk
/= FE_US_CYC_CNT_DIVISOR
;
938 sysclk
<<= FE_US_CYC_CNT_SHIFT
;
940 fe_w32((fe_r32(FE_FE_GLO_CFG
) &
941 ~(FE_US_CYC_CNT_MASK
<< FE_US_CYC_CNT_SHIFT
)) |
947 void fe_fwd_config(struct fe_priv
*priv
)
951 fwd_cfg
= fe_r32(FE_GDMA1_FWD_CFG
);
953 /* disable jumbo frame */
954 if (priv
->flags
& FE_FLAG_JUMBO_FRAME
)
955 fwd_cfg
&= ~FE_GDM1_JMB_EN
;
957 /* set unicast/multicast/broadcast frame to cpu */
960 fe_w32(fwd_cfg
, FE_GDMA1_FWD_CFG
);
963 static void fe_rxcsum_config(bool enable
)
966 fe_w32(fe_r32(FE_GDMA1_FWD_CFG
) | (FE_GDM1_ICS_EN
|
967 FE_GDM1_TCS_EN
| FE_GDM1_UCS_EN
),
970 fe_w32(fe_r32(FE_GDMA1_FWD_CFG
) & ~(FE_GDM1_ICS_EN
|
971 FE_GDM1_TCS_EN
| FE_GDM1_UCS_EN
),
975 static void fe_txcsum_config(bool enable
)
978 fe_w32(fe_r32(FE_CDMA_CSG_CFG
) | (FE_ICS_GEN_EN
|
979 FE_TCS_GEN_EN
| FE_UCS_GEN_EN
),
982 fe_w32(fe_r32(FE_CDMA_CSG_CFG
) & ~(FE_ICS_GEN_EN
|
983 FE_TCS_GEN_EN
| FE_UCS_GEN_EN
),
987 void fe_csum_config(struct fe_priv
*priv
)
989 struct net_device
*dev
= priv_netdev(priv
);
991 fe_txcsum_config((dev
->features
& NETIF_F_IP_CSUM
));
992 fe_rxcsum_config((dev
->features
& NETIF_F_RXCSUM
));
995 static int fe_hw_init(struct net_device
*dev
)
997 struct fe_priv
*priv
= netdev_priv(dev
);
1000 err
= devm_request_irq(priv
->device
, dev
->irq
, fe_handle_irq
, 0,
1001 dev_name(priv
->device
), dev
);
1005 if (priv
->soc
->set_mac
)
1006 priv
->soc
->set_mac(priv
, dev
->dev_addr
);
1008 fe_hw_set_macaddr(priv
, dev
->dev_addr
);
1010 fe_reg_w32(FE_DELAY_INIT
, FE_REG_DLY_INT_CFG
);
1012 fe_int_disable(priv
->soc
->tx_dly_int
| priv
->soc
->rx_dly_int
);
1014 /* frame engine will push VLAN tag regarding to VIDX feild in Tx desc. */
1015 if (fe_reg_table
[FE_REG_FE_DMA_VID_BASE
])
1016 for (i
= 0; i
< 16; i
+= 2)
1017 fe_w32(((i
+ 1) << 16) + i
,
1018 fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
1021 BUG_ON(!priv
->soc
->fwd_config
);
1022 if (priv
->soc
->fwd_config(priv
))
1023 netdev_err(dev
, "unable to get clock\n");
1025 if (fe_reg_table
[FE_REG_FE_RST_GL
]) {
1026 fe_reg_w32(1, FE_REG_FE_RST_GL
);
1027 fe_reg_w32(0, FE_REG_FE_RST_GL
);
1033 static int fe_open(struct net_device
*dev
)
1035 struct fe_priv
*priv
= netdev_priv(dev
);
1036 unsigned long flags
;
1040 err
= fe_init_dma(priv
);
1044 spin_lock_irqsave(&priv
->page_lock
, flags
);
1045 napi_enable(&priv
->rx_napi
);
1047 val
= FE_TX_WB_DDONE
| FE_RX_DMA_EN
| FE_TX_DMA_EN
;
1048 val
|= priv
->soc
->pdma_glo_cfg
;
1049 fe_reg_w32(val
, FE_REG_PDMA_GLO_CFG
);
1051 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
1054 priv
->phy
->start(priv
);
1056 if (priv
->soc
->has_carrier
&& priv
->soc
->has_carrier(priv
))
1057 netif_carrier_on(dev
);
1059 netif_start_queue(dev
);
1060 fe_int_enable(priv
->soc
->tx_dly_int
| priv
->soc
->rx_dly_int
);
1069 static int fe_stop(struct net_device
*dev
)
1071 struct fe_priv
*priv
= netdev_priv(dev
);
1072 unsigned long flags
;
1075 fe_int_disable(priv
->soc
->tx_dly_int
| priv
->soc
->rx_dly_int
);
1077 netif_tx_disable(dev
);
1080 priv
->phy
->stop(priv
);
1082 spin_lock_irqsave(&priv
->page_lock
, flags
);
1083 napi_disable(&priv
->rx_napi
);
1085 fe_reg_w32(fe_reg_r32(FE_REG_PDMA_GLO_CFG
) &
1086 ~(FE_TX_WB_DDONE
| FE_RX_DMA_EN
| FE_TX_DMA_EN
),
1087 FE_REG_PDMA_GLO_CFG
);
1088 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
1091 for (i
= 0; i
< 10; i
++) {
1092 if (fe_reg_r32(FE_REG_PDMA_GLO_CFG
) &
1093 (FE_TX_DMA_BUSY
| FE_RX_DMA_BUSY
)) {
1105 static int __init
fe_init(struct net_device
*dev
)
1107 struct fe_priv
*priv
= netdev_priv(dev
);
1108 struct device_node
*port
;
1111 BUG_ON(!priv
->soc
->reset_fe
);
1112 priv
->soc
->reset_fe();
1114 if (priv
->soc
->switch_init
)
1115 priv
->soc
->switch_init(priv
);
1117 memcpy(dev
->dev_addr
, priv
->soc
->mac
, ETH_ALEN
);
1118 of_get_mac_address_mtd(priv
->device
->of_node
, dev
->dev_addr
);
1120 err
= fe_mdio_init(priv
);
1124 if (priv
->soc
->port_init
)
1125 for_each_child_of_node(priv
->device
->of_node
, port
)
1126 if (of_device_is_compatible(port
, "ralink,eth-port") && of_device_is_available(port
))
1127 priv
->soc
->port_init(priv
, port
);
1130 err
= priv
->phy
->connect(priv
);
1132 goto err_phy_disconnect
;
1135 err
= fe_hw_init(dev
);
1137 goto err_phy_disconnect
;
1139 if (priv
->soc
->switch_config
)
1140 priv
->soc
->switch_config(priv
);
1146 priv
->phy
->disconnect(priv
);
1147 fe_mdio_cleanup(priv
);
1152 static void fe_uninit(struct net_device
*dev
)
1154 struct fe_priv
*priv
= netdev_priv(dev
);
1157 priv
->phy
->disconnect(priv
);
1158 fe_mdio_cleanup(priv
);
1160 fe_reg_w32(0, FE_REG_FE_INT_ENABLE
);
1161 free_irq(dev
->irq
, dev
);
1164 static int fe_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1166 struct fe_priv
*priv
= netdev_priv(dev
);
1173 return phy_ethtool_ioctl(priv
->phy_dev
,
1174 (void *) ifr
->ifr_data
);
1178 return phy_mii_ioctl(priv
->phy_dev
, ifr
, cmd
);
1186 static int fe_change_mtu(struct net_device
*dev
, int new_mtu
)
1188 struct fe_priv
*priv
= netdev_priv(dev
);
1189 int frag_size
, old_mtu
;
1192 if (!(priv
->flags
& FE_FLAG_JUMBO_FRAME
))
1193 return eth_change_mtu(dev
, new_mtu
);
1195 frag_size
= fe_max_frag_size(new_mtu
);
1196 if (new_mtu
< 68 || frag_size
> PAGE_SIZE
)
1202 /* return early if the buffer sizes will not change */
1203 if (old_mtu
<= ETH_DATA_LEN
&& new_mtu
<= ETH_DATA_LEN
)
1205 if (old_mtu
> ETH_DATA_LEN
&& new_mtu
> ETH_DATA_LEN
)
1208 if (new_mtu
<= ETH_DATA_LEN
) {
1209 priv
->frag_size
= fe_max_frag_size(ETH_DATA_LEN
);
1210 priv
->rx_buf_size
= fe_max_buf_size(ETH_DATA_LEN
);
1212 priv
->frag_size
= PAGE_SIZE
;
1213 priv
->rx_buf_size
= fe_max_buf_size(PAGE_SIZE
);
1216 if (!netif_running(dev
))
1220 fwd_cfg
= fe_r32(FE_GDMA1_FWD_CFG
);
1221 if (new_mtu
<= ETH_DATA_LEN
)
1222 fwd_cfg
&= ~FE_GDM1_JMB_EN
;
1224 fwd_cfg
&= ~(FE_GDM1_JMB_LEN_MASK
<< FE_GDM1_JMB_LEN_SHIFT
);
1225 fwd_cfg
|= (DIV_ROUND_UP(frag_size
, 1024) <<
1226 FE_GDM1_JMB_LEN_SHIFT
) | FE_GDM1_JMB_EN
;
1228 fe_w32(fwd_cfg
, FE_GDMA1_FWD_CFG
);
1230 return fe_open(dev
);
1233 static const struct net_device_ops fe_netdev_ops
= {
1234 .ndo_init
= fe_init
,
1235 .ndo_uninit
= fe_uninit
,
1236 .ndo_open
= fe_open
,
1237 .ndo_stop
= fe_stop
,
1238 .ndo_start_xmit
= fe_start_xmit
,
1239 .ndo_set_mac_address
= fe_set_mac_address
,
1240 .ndo_validate_addr
= eth_validate_addr
,
1241 .ndo_do_ioctl
= fe_do_ioctl
,
1242 .ndo_change_mtu
= fe_change_mtu
,
1243 .ndo_tx_timeout
= fe_tx_timeout
,
1244 .ndo_get_stats64
= fe_get_stats64
,
1245 .ndo_vlan_rx_add_vid
= fe_vlan_rx_add_vid
,
1246 .ndo_vlan_rx_kill_vid
= fe_vlan_rx_kill_vid
,
1247 #ifdef CONFIG_NET_POLL_CONTROLLER
1248 .ndo_poll_controller
= fe_poll_controller
,
1252 static int fe_probe(struct platform_device
*pdev
)
1254 struct resource
*res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1255 const struct of_device_id
*match
;
1256 struct fe_soc_data
*soc
;
1257 struct net_device
*netdev
;
1258 struct fe_priv
*priv
;
1262 device_reset(&pdev
->dev
);
1264 match
= of_match_device(of_fe_match
, &pdev
->dev
);
1265 soc
= (struct fe_soc_data
*) match
->data
;
1268 fe_reg_table
= soc
->reg_table
;
1270 soc
->reg_table
= fe_reg_table
;
1272 fe_base
= devm_request_and_ioremap(&pdev
->dev
, res
);
1274 err
= -EADDRNOTAVAIL
;
1278 netdev
= alloc_etherdev(sizeof(*priv
));
1280 dev_err(&pdev
->dev
, "alloc_etherdev failed\n");
1285 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
1286 netdev
->netdev_ops
= &fe_netdev_ops
;
1287 netdev
->base_addr
= (unsigned long) fe_base
;
1288 netdev
->watchdog_timeo
= TX_TIMEOUT
;
1290 netdev
->irq
= platform_get_irq(pdev
, 0);
1291 if (netdev
->irq
< 0) {
1292 dev_err(&pdev
->dev
, "no IRQ resource found\n");
1298 soc
->init_data(soc
, netdev
);
1299 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
1300 netdev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_RX
;
1301 netdev
->vlan_features
= netdev
->hw_features
&
1302 ~(NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_CTAG_RX
);
1303 netdev
->features
|= netdev
->hw_features
;
1305 /* fake rx vlan filter func. to support tx vlan offload func */
1306 if (fe_reg_table
[FE_REG_FE_DMA_VID_BASE
])
1307 netdev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1309 priv
= netdev_priv(netdev
);
1310 spin_lock_init(&priv
->page_lock
);
1311 if (fe_reg_table
[FE_REG_FE_COUNTER_BASE
]) {
1312 priv
->hw_stats
= kzalloc(sizeof(*priv
->hw_stats
), GFP_KERNEL
);
1313 if (!priv
->hw_stats
) {
1317 spin_lock_init(&priv
->hw_stats
->stats_lock
);
1320 sysclk
= devm_clk_get(&pdev
->dev
, NULL
);
1321 if (!IS_ERR(sysclk
))
1322 priv
->sysclk
= clk_get_rate(sysclk
);
1324 priv
->netdev
= netdev
;
1325 priv
->device
= &pdev
->dev
;
1327 priv
->msg_enable
= netif_msg_init(fe_msg_level
, FE_DEFAULT_MSG_ENABLE
);
1328 priv
->frag_size
= fe_max_frag_size(ETH_DATA_LEN
);
1329 priv
->rx_buf_size
= fe_max_buf_size(ETH_DATA_LEN
);
1330 if (priv
->frag_size
> PAGE_SIZE
) {
1331 dev_err(&pdev
->dev
, "error frag size.\n");
1336 netif_napi_add(netdev
, &priv
->rx_napi
, fe_poll
, 32);
1337 fe_set_ethtool_ops(netdev
);
1339 err
= register_netdev(netdev
);
1341 dev_err(&pdev
->dev
, "error bringing up device\n");
1345 platform_set_drvdata(pdev
, netdev
);
1347 netif_info(priv
, probe
, netdev
, "ralink at 0x%08lx, irq %d\n",
1348 netdev
->base_addr
, netdev
->irq
);
1353 free_netdev(netdev
);
1355 devm_iounmap(&pdev
->dev
, fe_base
);
1360 static int fe_remove(struct platform_device
*pdev
)
1362 struct net_device
*dev
= platform_get_drvdata(pdev
);
1363 struct fe_priv
*priv
= netdev_priv(dev
);
1365 netif_napi_del(&priv
->rx_napi
);
1367 kfree(priv
->hw_stats
);
1369 unregister_netdev(dev
);
1371 platform_set_drvdata(pdev
, NULL
);
1376 static struct platform_driver fe_driver
= {
1378 .remove
= fe_remove
,
1380 .name
= "ralink_soc_eth",
1381 .owner
= THIS_MODULE
,
1382 .of_match_table
= of_fe_match
,
1386 static int __init
init_rtfe(void)
1394 ret
= platform_driver_register(&fe_driver
);
1401 static void __exit
exit_rtfe(void)
1403 platform_driver_unregister(&fe_driver
);
1407 module_init(init_rtfe
);
1408 module_exit(exit_rtfe
);
1410 MODULE_LICENSE("GPL");
1411 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
1412 MODULE_DESCRIPTION("Ethernet driver for Ralink SoC");
1413 MODULE_VERSION(FE_DRV_VERSION
);