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 MAX_RX_LENGTH 1536
44 #define FE_RX_HLEN (NET_SKB_PAD + VLAN_ETH_HLEN + VLAN_HLEN + \
45 + NET_IP_ALIGN + ETH_FCS_LEN)
46 #define DMA_DUMMY_DESC 0xffffffff
47 #define FE_DEFAULT_MSG_ENABLE \
57 #define TX_DMA_DESP2_DEF (TX_DMA_LS0 | TX_DMA_DONE)
58 #define TX_DMA_DESP4_DEF (TX_DMA_QN(3) | TX_DMA_PN(1))
59 #define NEXT_TX_DESP_IDX(X) (((X) + 1) & (priv->tx_ring_size - 1))
60 #define NEXT_RX_DESP_IDX(X) (((X) + 1) & (priv->rx_ring_size - 1))
62 #define SYSC_REG_RSTCTRL 0x34
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 u16 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_TX_DTX_IDX0
] = FE_TX_DTX_IDX0
,
76 [FE_REG_RX_BASE_PTR0
] = FE_RX_BASE_PTR0
,
77 [FE_REG_RX_MAX_CNT0
] = FE_RX_MAX_CNT0
,
78 [FE_REG_RX_CALC_IDX0
] = FE_RX_CALC_IDX0
,
79 [FE_REG_RX_DRX_IDX0
] = FE_RX_DRX_IDX0
,
80 [FE_REG_FE_INT_ENABLE
] = FE_FE_INT_ENABLE
,
81 [FE_REG_FE_INT_STATUS
] = FE_FE_INT_STATUS
,
82 [FE_REG_FE_DMA_VID_BASE
] = FE_DMA_VID0
,
83 [FE_REG_FE_COUNTER_BASE
] = FE_GDMA1_TX_GBCNT
,
84 [FE_REG_FE_RST_GL
] = FE_FE_RST_GL
,
87 static const u16
*fe_reg_table
= fe_reg_table_default
;
91 void (*action
)(struct fe_priv
*);
94 static void __iomem
*fe_base
= 0;
96 void fe_w32(u32 val
, unsigned reg
)
98 __raw_writel(val
, fe_base
+ reg
);
101 u32
fe_r32(unsigned reg
)
103 return __raw_readl(fe_base
+ reg
);
106 void fe_reg_w32(u32 val
, enum fe_reg reg
)
108 fe_w32(val
, fe_reg_table
[reg
]);
111 u32
fe_reg_r32(enum fe_reg reg
)
113 return fe_r32(fe_reg_table
[reg
]);
116 void fe_reset(u32 reset_bits
)
120 t
= rt_sysc_r32(SYSC_REG_RSTCTRL
);
122 rt_sysc_w32(t
, SYSC_REG_RSTCTRL
);
126 rt_sysc_w32(t
, SYSC_REG_RSTCTRL
);
130 static inline void fe_int_disable(u32 mask
)
132 fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE
) & ~mask
,
133 FE_REG_FE_INT_ENABLE
);
135 fe_reg_r32(FE_REG_FE_INT_ENABLE
);
138 static inline void fe_int_enable(u32 mask
)
140 fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE
) | mask
,
141 FE_REG_FE_INT_ENABLE
);
143 fe_reg_r32(FE_REG_FE_INT_ENABLE
);
146 static inline void fe_hw_set_macaddr(struct fe_priv
*priv
, unsigned char *mac
)
150 spin_lock_irqsave(&priv
->page_lock
, flags
);
151 fe_w32((mac
[0] << 8) | mac
[1], FE_GDMA1_MAC_ADRH
);
152 fe_w32((mac
[2] << 24) | (mac
[3] << 16) | (mac
[4] << 8) | mac
[5],
154 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
157 static int fe_set_mac_address(struct net_device
*dev
, void *p
)
159 int ret
= eth_mac_addr(dev
, p
);
162 struct fe_priv
*priv
= netdev_priv(dev
);
164 if (priv
->soc
->set_mac
)
165 priv
->soc
->set_mac(priv
, dev
->dev_addr
);
167 fe_hw_set_macaddr(priv
, p
);
173 static inline int fe_max_frag_size(int mtu
)
175 return SKB_DATA_ALIGN(FE_RX_HLEN
+ mtu
) +
176 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
179 static inline int fe_max_buf_size(int frag_size
)
181 return frag_size
- NET_SKB_PAD
- NET_IP_ALIGN
-
182 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
185 static inline void fe_get_rxd(struct fe_rx_dma
*rxd
, struct fe_rx_dma
*dma_rxd
)
187 rxd
->rxd1
= dma_rxd
->rxd1
;
188 rxd
->rxd2
= dma_rxd
->rxd2
;
189 rxd
->rxd3
= dma_rxd
->rxd3
;
190 rxd
->rxd4
= dma_rxd
->rxd4
;
193 static inline void fe_set_txd(struct fe_tx_dma
*txd
, struct fe_tx_dma
*dma_txd
)
195 dma_txd
->txd1
= txd
->txd1
;
196 dma_txd
->txd3
= txd
->txd3
;
197 dma_txd
->txd4
= txd
->txd4
;
198 /* clean dma done flag last */
199 dma_txd
->txd2
= txd
->txd2
;
202 static void fe_clean_rx(struct fe_priv
*priv
)
207 for (i
= 0; i
< priv
->rx_ring_size
; i
++)
208 if (priv
->rx_data
[i
]) {
209 if (priv
->rx_dma
&& priv
->rx_dma
[i
].rxd1
)
210 dma_unmap_single(&priv
->netdev
->dev
,
211 priv
->rx_dma
[i
].rxd1
,
214 put_page(virt_to_head_page(priv
->rx_data
[i
]));
217 kfree(priv
->rx_data
);
218 priv
->rx_data
= NULL
;
222 dma_free_coherent(&priv
->netdev
->dev
,
223 priv
->rx_ring_size
* sizeof(*priv
->rx_dma
),
230 static int fe_alloc_rx(struct fe_priv
*priv
)
232 struct net_device
*netdev
= priv
->netdev
;
235 priv
->rx_data
= kcalloc(priv
->rx_ring_size
, sizeof(*priv
->rx_data
),
240 for (i
= 0; i
< priv
->rx_ring_size
; i
++) {
241 priv
->rx_data
[i
] = netdev_alloc_frag(priv
->frag_size
);
242 if (!priv
->rx_data
[i
])
246 priv
->rx_dma
= dma_alloc_coherent(&netdev
->dev
,
247 priv
->rx_ring_size
* sizeof(*priv
->rx_dma
),
249 GFP_ATOMIC
| __GFP_ZERO
);
253 if (priv
->flags
& FE_FLAG_RX_2B_OFFSET
)
257 for (i
= 0; i
< priv
->rx_ring_size
; i
++) {
258 dma_addr_t dma_addr
= dma_map_single(&netdev
->dev
,
259 priv
->rx_data
[i
] + NET_SKB_PAD
+ pad
,
262 if (unlikely(dma_mapping_error(&netdev
->dev
, dma_addr
)))
264 priv
->rx_dma
[i
].rxd1
= (unsigned int) dma_addr
;
266 if (priv
->flags
& FE_FLAG_RX_SG_DMA
)
267 priv
->rx_dma
[i
].rxd2
= RX_DMA_PLEN0(priv
->rx_buf_size
);
269 priv
->rx_dma
[i
].rxd2
= RX_DMA_LSO
;
273 fe_reg_w32(priv
->rx_phys
, FE_REG_RX_BASE_PTR0
);
274 fe_reg_w32(priv
->rx_ring_size
, FE_REG_RX_MAX_CNT0
);
275 fe_reg_w32((priv
->rx_ring_size
- 1), FE_REG_RX_CALC_IDX0
);
276 fe_reg_w32(FE_PST_DRX_IDX0
, FE_REG_PDMA_RST_CFG
);
284 static void fe_txd_unmap(struct device
*dev
, struct fe_tx_buf
*tx_buf
)
286 if (tx_buf
->flags
& FE_TX_FLAGS_SINGLE0
) {
287 dma_unmap_single(dev
,
288 dma_unmap_addr(tx_buf
, dma_addr0
),
289 dma_unmap_len(tx_buf
, dma_len0
),
291 } else if (tx_buf
->flags
& FE_TX_FLAGS_PAGE0
) {
293 dma_unmap_addr(tx_buf
, dma_addr0
),
294 dma_unmap_len(tx_buf
, dma_len0
),
297 if (tx_buf
->flags
& FE_TX_FLAGS_PAGE1
)
299 dma_unmap_addr(tx_buf
, dma_addr1
),
300 dma_unmap_len(tx_buf
, dma_len1
),
304 if (tx_buf
->skb
&& (tx_buf
->skb
!= (struct sk_buff
*) DMA_DUMMY_DESC
)) {
305 dev_kfree_skb_any(tx_buf
->skb
);
310 static void fe_clean_tx(struct fe_priv
*priv
)
315 for (i
= 0; i
< priv
->tx_ring_size
; i
++)
316 fe_txd_unmap(&priv
->netdev
->dev
, &priv
->tx_buf
[i
]);
322 dma_free_coherent(&priv
->netdev
->dev
,
323 priv
->tx_ring_size
* sizeof(*priv
->tx_dma
),
330 static int fe_alloc_tx(struct fe_priv
*priv
)
334 priv
->tx_free_idx
= 0;
336 priv
->tx_buf
= kcalloc(priv
->tx_ring_size
, sizeof(*priv
->tx_buf
),
341 priv
->tx_dma
= dma_alloc_coherent(&priv
->netdev
->dev
,
342 priv
->tx_ring_size
* sizeof(*priv
->tx_dma
),
344 GFP_ATOMIC
| __GFP_ZERO
);
348 for (i
= 0; i
< priv
->tx_ring_size
; i
++) {
349 if (priv
->soc
->tx_dma
) {
350 priv
->soc
->tx_dma(&priv
->tx_dma
[i
]);
352 priv
->tx_dma
[i
].txd2
= TX_DMA_DESP2_DEF
;
356 fe_reg_w32(priv
->tx_phys
, FE_REG_TX_BASE_PTR0
);
357 fe_reg_w32(priv
->tx_ring_size
, FE_REG_TX_MAX_CNT0
);
358 fe_reg_w32(0, FE_REG_TX_CTX_IDX0
);
359 fe_reg_w32(FE_PST_DTX_IDX0
, FE_REG_PDMA_RST_CFG
);
367 static int fe_init_dma(struct fe_priv
*priv
)
371 err
= fe_alloc_tx(priv
);
375 err
= fe_alloc_rx(priv
);
382 static void fe_free_dma(struct fe_priv
*priv
)
387 netdev_reset_queue(priv
->netdev
);
390 void fe_stats_update(struct fe_priv
*priv
)
392 struct fe_hw_stats
*hwstats
= priv
->hw_stats
;
393 unsigned int base
= fe_reg_table
[FE_REG_FE_COUNTER_BASE
];
396 u64_stats_update_begin(&hwstats
->syncp
);
398 if (IS_ENABLED(CONFIG_SOC_MT7621
)) {
399 hwstats
->rx_bytes
+= fe_r32(base
);
400 stats
= fe_r32(base
+ 0x04);
402 hwstats
->rx_bytes
+= (stats
<< 32);
403 hwstats
->rx_packets
+= fe_r32(base
+ 0x08);
404 hwstats
->rx_overflow
+= fe_r32(base
+ 0x10);
405 hwstats
->rx_fcs_errors
+= fe_r32(base
+ 0x14);
406 hwstats
->rx_short_errors
+= fe_r32(base
+ 0x18);
407 hwstats
->rx_long_errors
+= fe_r32(base
+ 0x1c);
408 hwstats
->rx_checksum_errors
+= fe_r32(base
+ 0x20);
409 hwstats
->rx_flow_control_packets
+= fe_r32(base
+ 0x24);
410 hwstats
->tx_skip
+= fe_r32(base
+ 0x28);
411 hwstats
->tx_collisions
+= fe_r32(base
+ 0x2c);
412 hwstats
->tx_bytes
+= fe_r32(base
+ 0x30);
413 stats
= fe_r32(base
+ 0x34);
415 hwstats
->tx_bytes
+= (stats
<< 32);
416 hwstats
->tx_packets
+= fe_r32(base
+ 0x38);
418 hwstats
->tx_bytes
+= fe_r32(base
);
419 hwstats
->tx_packets
+= fe_r32(base
+ 0x04);
420 hwstats
->tx_skip
+= fe_r32(base
+ 0x08);
421 hwstats
->tx_collisions
+= fe_r32(base
+ 0x0c);
422 hwstats
->rx_bytes
+= fe_r32(base
+ 0x20);
423 hwstats
->rx_packets
+= fe_r32(base
+ 0x24);
424 hwstats
->rx_overflow
+= fe_r32(base
+ 0x28);
425 hwstats
->rx_fcs_errors
+= fe_r32(base
+ 0x2c);
426 hwstats
->rx_short_errors
+= fe_r32(base
+ 0x30);
427 hwstats
->rx_long_errors
+= fe_r32(base
+ 0x34);
428 hwstats
->rx_checksum_errors
+= fe_r32(base
+ 0x38);
429 hwstats
->rx_flow_control_packets
+= fe_r32(base
+ 0x3c);
432 u64_stats_update_end(&hwstats
->syncp
);
435 static struct rtnl_link_stats64
*fe_get_stats64(struct net_device
*dev
,
436 struct rtnl_link_stats64
*storage
)
438 struct fe_priv
*priv
= netdev_priv(dev
);
439 struct fe_hw_stats
*hwstats
= priv
->hw_stats
;
440 unsigned int base
= fe_reg_table
[FE_REG_FE_COUNTER_BASE
];
444 netdev_stats_to_stats64(storage
, &dev
->stats
);
448 if (netif_running(dev
) && netif_device_present(dev
)) {
449 if (spin_trylock(&hwstats
->stats_lock
)) {
450 fe_stats_update(priv
);
451 spin_unlock(&hwstats
->stats_lock
);
456 start
= u64_stats_fetch_begin_irq(&hwstats
->syncp
);
457 storage
->rx_packets
= hwstats
->rx_packets
;
458 storage
->tx_packets
= hwstats
->tx_packets
;
459 storage
->rx_bytes
= hwstats
->rx_bytes
;
460 storage
->tx_bytes
= hwstats
->tx_bytes
;
461 storage
->collisions
= hwstats
->tx_collisions
;
462 storage
->rx_length_errors
= hwstats
->rx_short_errors
+
463 hwstats
->rx_long_errors
;
464 storage
->rx_over_errors
= hwstats
->rx_overflow
;
465 storage
->rx_crc_errors
= hwstats
->rx_fcs_errors
;
466 storage
->rx_errors
= hwstats
->rx_checksum_errors
;
467 storage
->tx_aborted_errors
= hwstats
->tx_skip
;
468 } while (u64_stats_fetch_retry_irq(&hwstats
->syncp
, start
));
470 storage
->tx_errors
= priv
->netdev
->stats
.tx_errors
;
471 storage
->rx_dropped
= priv
->netdev
->stats
.rx_dropped
;
472 storage
->tx_dropped
= priv
->netdev
->stats
.tx_dropped
;
477 static int fe_vlan_rx_add_vid(struct net_device
*dev
,
478 __be16 proto
, u16 vid
)
480 struct fe_priv
*priv
= netdev_priv(dev
);
481 u32 idx
= (vid
& 0xf);
484 if (!((fe_reg_table
[FE_REG_FE_DMA_VID_BASE
]) &&
485 (dev
->features
& NETIF_F_HW_VLAN_CTAG_TX
)))
488 if (test_bit(idx
, &priv
->vlan_map
)) {
489 netdev_warn(dev
, "disable tx vlan offload\n");
490 dev
->wanted_features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
491 netdev_update_features(dev
);
493 vlan_cfg
= fe_r32(fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
497 vlan_cfg
|= (vid
<< 16);
499 vlan_cfg
&= 0xffff0000;
502 fe_w32(vlan_cfg
, fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
504 set_bit(idx
, &priv
->vlan_map
);
510 static int fe_vlan_rx_kill_vid(struct net_device
*dev
,
511 __be16 proto
, u16 vid
)
513 struct fe_priv
*priv
= netdev_priv(dev
);
514 u32 idx
= (vid
& 0xf);
516 if (!((fe_reg_table
[FE_REG_FE_DMA_VID_BASE
]) &&
517 (dev
->features
& NETIF_F_HW_VLAN_CTAG_TX
)))
520 clear_bit(idx
, &priv
->vlan_map
);
525 static int fe_tx_map_dma(struct sk_buff
*skb
, struct net_device
*dev
,
528 struct fe_priv
*priv
= netdev_priv(dev
);
529 struct skb_frag_struct
*frag
;
530 struct fe_tx_dma txd
, *ptxd
;
531 struct fe_tx_buf
*tx_buf
;
532 dma_addr_t mapped_addr
;
533 unsigned int nr_frags
;
535 int i
, j
, k
, frag_size
, frag_map_size
, offset
;
537 tx_buf
= &priv
->tx_buf
[idx
];
538 memset(tx_buf
, 0, sizeof(*tx_buf
));
539 memset(&txd
, 0, sizeof(txd
));
540 nr_frags
= skb_shinfo(skb
)->nr_frags
;
542 /* init tx descriptor */
543 if (priv
->soc
->tx_dma
)
544 priv
->soc
->tx_dma(&txd
);
546 txd
.txd4
= TX_DMA_DESP4_DEF
;
549 /* TX Checksum offload */
550 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
551 txd
.txd4
|= TX_DMA_CHKSUM
;
553 /* VLAN header offload */
554 if (vlan_tx_tag_present(skb
)) {
555 if (IS_ENABLED(CONFIG_SOC_MT7621
))
556 txd
.txd4
|= TX_DMA_INS_VLAN_MT7621
| vlan_tx_tag_get(skb
);
558 txd
.txd4
|= TX_DMA_INS_VLAN
|
559 ((vlan_tx_tag_get(skb
) >> VLAN_PRIO_SHIFT
) << 4) |
560 (vlan_tx_tag_get(skb
) & 0xF);
563 /* TSO: fill MSS info in tcp checksum field */
564 if (skb_is_gso(skb
)) {
565 if (skb_cow_head(skb
, 0)) {
566 netif_warn(priv
, tx_err
, dev
,
567 "GSO expand head fail.\n");
570 if (skb_shinfo(skb
)->gso_type
&
571 (SKB_GSO_TCPV4
| SKB_GSO_TCPV6
)) {
572 txd
.txd4
|= TX_DMA_TSO
;
573 tcp_hdr(skb
)->check
= htons(skb_shinfo(skb
)->gso_size
);
577 mapped_addr
= dma_map_single(&dev
->dev
, skb
->data
,
578 skb_headlen(skb
), DMA_TO_DEVICE
);
579 if (unlikely(dma_mapping_error(&dev
->dev
, mapped_addr
)))
581 txd
.txd1
= mapped_addr
;
582 txd
.txd2
= TX_DMA_PLEN0(skb_headlen(skb
));
584 tx_buf
->flags
|= FE_TX_FLAGS_SINGLE0
;
585 dma_unmap_addr_set(tx_buf
, dma_addr0
, mapped_addr
);
586 dma_unmap_len_set(tx_buf
, dma_len0
, skb_headlen(skb
));
591 for (i
= 0; i
< nr_frags
; i
++) {
593 frag
= &skb_shinfo(skb
)->frags
[i
];
594 frag_size
= skb_frag_size(frag
);
596 while (frag_size
> 0) {
597 frag_map_size
= min(frag_size
, TX_DMA_BUF_LEN
);
598 mapped_addr
= skb_frag_dma_map(&dev
->dev
, frag
, offset
,
599 frag_map_size
, DMA_TO_DEVICE
);
600 if (unlikely(dma_mapping_error(&dev
->dev
, mapped_addr
)))
604 j
= NEXT_TX_DESP_IDX(j
);
605 txd
.txd1
= mapped_addr
;
606 txd
.txd2
= TX_DMA_PLEN0(frag_map_size
);
609 tx_buf
= &priv
->tx_buf
[j
];
610 memset(tx_buf
, 0, sizeof(*tx_buf
));
612 tx_buf
->flags
|= FE_TX_FLAGS_PAGE0
;
613 dma_unmap_addr_set(tx_buf
, dma_addr0
, mapped_addr
);
614 dma_unmap_len_set(tx_buf
, dma_len0
, frag_map_size
);
616 txd
.txd3
= mapped_addr
;
617 txd
.txd2
|= TX_DMA_PLEN1(frag_map_size
);
619 tx_buf
->skb
= (struct sk_buff
*) DMA_DUMMY_DESC
;
620 tx_buf
->flags
|= FE_TX_FLAGS_PAGE1
;
621 dma_unmap_addr_set(tx_buf
, dma_addr1
, mapped_addr
);
622 dma_unmap_len_set(tx_buf
, dma_len1
, frag_map_size
);
624 if (!((i
== (nr_frags
-1)) &&
625 (frag_map_size
== frag_size
))) {
626 fe_set_txd(&txd
, &priv
->tx_dma
[j
]);
627 memset(&txd
, 0, sizeof(txd
));
630 frag_size
-= frag_map_size
;
631 offset
+= frag_map_size
;
636 /* set last segment */
638 txd
.txd2
|= TX_DMA_LS1
;
640 txd
.txd2
|= TX_DMA_LS0
;
641 fe_set_txd(&txd
, &priv
->tx_dma
[j
]);
643 /* store skb to cleanup */
646 netdev_sent_queue(dev
, skb
->len
);
647 skb_tx_timestamp(skb
);
649 j
= NEXT_TX_DESP_IDX(j
);
651 fe_reg_w32(j
, FE_REG_TX_CTX_IDX0
);
657 for (i
= 0; i
< tx_num
; i
++) {
658 ptxd
= &priv
->tx_dma
[j
];
659 tx_buf
= &priv
->tx_buf
[j
];
662 fe_txd_unmap(&dev
->dev
, tx_buf
);
664 ptxd
->txd2
= TX_DMA_DESP2_DEF
;
665 j
= NEXT_TX_DESP_IDX(j
);
673 static inline int fe_skb_padto(struct sk_buff
*skb
, struct fe_priv
*priv
) {
678 if (unlikely(skb
->len
< VLAN_ETH_ZLEN
)) {
679 if ((priv
->flags
& FE_FLAG_PADDING_64B
) &&
680 !(priv
->flags
& FE_FLAG_PADDING_BUG
))
683 if (vlan_tx_tag_present(skb
))
685 else if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
687 else if(!(priv
->flags
& FE_FLAG_PADDING_64B
))
692 if (skb
->len
< len
) {
693 if ((ret
= skb_pad(skb
, len
- skb
->len
)) < 0)
696 skb_set_tail_pointer(skb
, len
);
703 static inline u32
fe_empty_txd(struct fe_priv
*priv
, u32 tx_fill_idx
)
705 return (u32
)(priv
->tx_ring_size
- ((tx_fill_idx
- priv
->tx_free_idx
) &
706 (priv
->tx_ring_size
- 1)));
709 static inline int fe_cal_txd_req(struct sk_buff
*skb
)
712 struct skb_frag_struct
*frag
;
715 if (skb_is_gso(skb
)) {
716 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
717 frag
= &skb_shinfo(skb
)->frags
[i
];
718 nfrags
+= DIV_ROUND_UP(frag
->size
, TX_DMA_BUF_LEN
);
721 nfrags
+= skb_shinfo(skb
)->nr_frags
;
724 return DIV_ROUND_UP(nfrags
, 2);
727 static int fe_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
729 struct fe_priv
*priv
= netdev_priv(dev
);
730 struct net_device_stats
*stats
= &dev
->stats
;
735 if (fe_skb_padto(skb
, priv
)) {
736 netif_warn(priv
, tx_err
, dev
, "tx padding failed!\n");
740 tx_num
= fe_cal_txd_req(skb
);
741 tx
= fe_reg_r32(FE_REG_TX_CTX_IDX0
);
742 if (unlikely(fe_empty_txd(priv
, tx
) <= tx_num
))
744 netif_stop_queue(dev
);
745 netif_err(priv
, tx_queued
,dev
,
746 "Tx Ring full when queue awake!\n");
747 return NETDEV_TX_BUSY
;
750 if (fe_tx_map_dma(skb
, dev
, tx
, tx_num
) < 0) {
754 stats
->tx_bytes
+= len
;
760 static inline void fe_rx_vlan(struct sk_buff
*skb
)
765 if (!__vlan_get_tag(skb
, &vlanid
)) {
766 /* pop the vlan tag */
767 ehdr
= (struct ethhdr
*)skb
->data
;
768 memmove(skb
->data
+ VLAN_HLEN
, ehdr
, ETH_ALEN
* 2);
769 skb_pull(skb
, VLAN_HLEN
);
770 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vlanid
);
774 static int fe_poll_rx(struct napi_struct
*napi
, int budget
,
775 struct fe_priv
*priv
, u32 rx_intr
)
777 struct net_device
*netdev
= priv
->netdev
;
778 struct net_device_stats
*stats
= &netdev
->stats
;
779 struct fe_soc_data
*soc
= priv
->soc
;
781 int idx
= fe_reg_r32(FE_REG_RX_CALC_IDX0
);
784 struct fe_rx_dma
*rxd
, trxd
;
786 bool rx_vlan
= netdev
->features
& NETIF_F_HW_VLAN_CTAG_RX
;
788 if (netdev
->features
& NETIF_F_RXCSUM
)
789 checksum_bit
= soc
->checksum_bit
;
793 if (priv
->flags
& FE_FLAG_RX_2B_OFFSET
)
798 while (done
< budget
) {
801 idx
= NEXT_RX_DESP_IDX(idx
);
802 rxd
= &priv
->rx_dma
[idx
];
803 data
= priv
->rx_data
[idx
];
805 fe_get_rxd(&trxd
, rxd
);
806 if (!(trxd
.rxd2
& RX_DMA_DONE
))
809 /* alloc new buffer */
810 new_data
= netdev_alloc_frag(priv
->frag_size
);
811 if (unlikely(!new_data
)) {
815 dma_addr
= dma_map_single(&netdev
->dev
,
816 new_data
+ NET_SKB_PAD
+ pad
,
819 if (unlikely(dma_mapping_error(&netdev
->dev
, dma_addr
))) {
820 put_page(virt_to_head_page(new_data
));
825 skb
= build_skb(data
, priv
->frag_size
);
826 if (unlikely(!skb
)) {
827 put_page(virt_to_head_page(new_data
));
830 skb_reserve(skb
, NET_SKB_PAD
+ NET_IP_ALIGN
);
832 dma_unmap_single(&netdev
->dev
, trxd
.rxd1
,
833 priv
->rx_buf_size
, DMA_FROM_DEVICE
);
834 pktlen
= RX_DMA_PLEN0(trxd
.rxd2
);
836 skb_put(skb
, pktlen
);
837 if (trxd
.rxd4
& checksum_bit
) {
838 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
840 skb_checksum_none_assert(skb
);
844 skb
->protocol
= eth_type_trans(skb
, netdev
);
847 stats
->rx_bytes
+= pktlen
;
849 napi_gro_receive(napi
, skb
);
851 priv
->rx_data
[idx
] = new_data
;
852 rxd
->rxd1
= (unsigned int) dma_addr
;
855 if (priv
->flags
& FE_FLAG_RX_SG_DMA
)
856 rxd
->rxd2
= RX_DMA_PLEN0(priv
->rx_buf_size
);
858 rxd
->rxd2
= RX_DMA_LSO
;
861 fe_reg_w32(idx
, FE_REG_RX_CALC_IDX0
);
866 fe_reg_w32(rx_intr
, FE_REG_FE_INT_STATUS
);
871 static int fe_poll_tx(struct fe_priv
*priv
, int budget
, u32 tx_intr
)
873 struct net_device
*netdev
= priv
->netdev
;
874 struct device
*dev
= &netdev
->dev
;
875 unsigned int bytes_compl
= 0;
877 struct fe_tx_buf
*tx_buf
;
881 hwidx
= fe_reg_r32(FE_REG_TX_DTX_IDX0
);
882 idx
= priv
->tx_free_idx
;
885 while ((idx
!= hwidx
) && budget
) {
886 tx_buf
= &priv
->tx_buf
[idx
];
892 if (skb
!= (struct sk_buff
*) DMA_DUMMY_DESC
) {
893 bytes_compl
+= skb
->len
;
897 fe_txd_unmap(dev
, tx_buf
);
898 idx
= NEXT_TX_DESP_IDX(idx
);
900 priv
->tx_free_idx
= idx
;
903 fe_reg_w32(tx_intr
, FE_REG_FE_INT_STATUS
);
904 hwidx
= fe_reg_r32(FE_REG_TX_DTX_IDX0
);
912 netdev_completed_queue(netdev
, done
, bytes_compl
);
913 if (unlikely(netif_queue_stopped(netdev
) &&
914 netif_carrier_ok(netdev
))) {
915 netif_wake_queue(netdev
);
921 static int fe_poll(struct napi_struct
*napi
, int budget
)
923 struct fe_priv
*priv
= container_of(napi
, struct fe_priv
, rx_napi
);
924 struct fe_hw_stats
*hwstat
= priv
->hw_stats
;
925 int tx_done
, rx_done
;
926 u32 status
, fe_status
, status_reg
, mask
;
927 u32 tx_intr
, rx_intr
, status_intr
;
929 fe_status
= status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
930 tx_intr
= priv
->soc
->tx_int
;
931 rx_intr
= priv
->soc
->rx_int
;
932 status_intr
= priv
->soc
->status_int
;
933 tx_done
= rx_done
= 0;
935 if (fe_reg_table
[FE_REG_FE_INT_STATUS2
]) {
936 fe_status
= fe_reg_r32(FE_REG_FE_INT_STATUS2
);
937 status_reg
= FE_REG_FE_INT_STATUS2
;
939 status_reg
= FE_REG_FE_INT_STATUS
;
941 if (status
& tx_intr
)
942 tx_done
= fe_poll_tx(priv
, budget
, tx_intr
);
944 if (status
& rx_intr
)
945 rx_done
= fe_poll_rx(napi
, budget
, priv
, rx_intr
);
947 if (unlikely(fe_status
& status_intr
)) {
948 if (hwstat
&& spin_trylock(&hwstat
->stats_lock
)) {
949 fe_stats_update(priv
);
950 spin_unlock(&hwstat
->stats_lock
);
952 fe_reg_w32(status_intr
, status_reg
);
955 if (unlikely(netif_msg_intr(priv
))) {
956 mask
= fe_reg_r32(FE_REG_FE_INT_ENABLE
);
957 netdev_info(priv
->netdev
,
958 "done tx %d, rx %d, intr 0x%08x/0x%x\n",
959 tx_done
, rx_done
, status
, mask
);
962 if ((tx_done
< budget
) && (rx_done
< budget
)) {
963 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
964 if (status
& (tx_intr
| rx_intr
))
968 fe_int_enable(tx_intr
| rx_intr
);
975 static void fe_tx_timeout(struct net_device
*dev
)
977 struct fe_priv
*priv
= netdev_priv(dev
);
979 priv
->netdev
->stats
.tx_errors
++;
980 netif_err(priv
, tx_err
, dev
,
981 "transmit timed out\n");
982 netif_info(priv
, drv
, dev
, "dma_cfg:%08x\n",
983 fe_reg_r32(FE_REG_PDMA_GLO_CFG
));
984 netif_info(priv
, drv
, dev
, "tx_ring=%d, " \
985 "base=%08x, max=%u, ctx=%u, dtx=%u, fdx=%d\n", 0,
986 fe_reg_r32(FE_REG_TX_BASE_PTR0
),
987 fe_reg_r32(FE_REG_TX_MAX_CNT0
),
988 fe_reg_r32(FE_REG_TX_CTX_IDX0
),
989 fe_reg_r32(FE_REG_TX_DTX_IDX0
),
992 netif_info(priv
, drv
, dev
, "rx_ring=%d, " \
993 "base=%08x, max=%u, calc=%u, drx=%u\n", 0,
994 fe_reg_r32(FE_REG_RX_BASE_PTR0
),
995 fe_reg_r32(FE_REG_RX_MAX_CNT0
),
996 fe_reg_r32(FE_REG_RX_CALC_IDX0
),
997 fe_reg_r32(FE_REG_RX_DRX_IDX0
)
1000 if (!test_and_set_bit(FE_FLAG_RESET_PENDING
, priv
->pending_flags
))
1001 schedule_work(&priv
->pending_work
);
1004 static irqreturn_t
fe_handle_irq(int irq
, void *dev
)
1006 struct fe_priv
*priv
= netdev_priv(dev
);
1007 u32 status
, int_mask
;
1009 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
1011 if (unlikely(!status
))
1014 int_mask
= (priv
->soc
->rx_int
| priv
->soc
->tx_int
);
1015 if (likely(status
& int_mask
)) {
1016 if (likely(napi_schedule_prep(&priv
->rx_napi
))) {
1017 fe_int_disable(int_mask
);
1018 __napi_schedule(&priv
->rx_napi
);
1021 fe_reg_w32(status
, FE_REG_FE_INT_STATUS
);
1027 #ifdef CONFIG_NET_POLL_CONTROLLER
1028 static void fe_poll_controller(struct net_device
*dev
)
1030 struct fe_priv
*priv
= netdev_priv(dev
);
1031 u32 int_mask
= priv
->soc
->tx_int
| priv
->soc
->rx_int
;
1033 fe_int_disable(int_mask
);
1034 fe_handle_irq(dev
->irq
, dev
);
1035 fe_int_enable(int_mask
);
1039 int fe_set_clock_cycle(struct fe_priv
*priv
)
1041 unsigned long sysclk
= priv
->sysclk
;
1047 sysclk
/= FE_US_CYC_CNT_DIVISOR
;
1048 sysclk
<<= FE_US_CYC_CNT_SHIFT
;
1050 fe_w32((fe_r32(FE_FE_GLO_CFG
) &
1051 ~(FE_US_CYC_CNT_MASK
<< FE_US_CYC_CNT_SHIFT
)) |
1057 void fe_fwd_config(struct fe_priv
*priv
)
1061 fwd_cfg
= fe_r32(FE_GDMA1_FWD_CFG
);
1063 /* disable jumbo frame */
1064 if (priv
->flags
& FE_FLAG_JUMBO_FRAME
)
1065 fwd_cfg
&= ~FE_GDM1_JMB_EN
;
1067 /* set unicast/multicast/broadcast frame to cpu */
1070 fe_w32(fwd_cfg
, FE_GDMA1_FWD_CFG
);
1073 static void fe_rxcsum_config(bool enable
)
1076 fe_w32(fe_r32(FE_GDMA1_FWD_CFG
) | (FE_GDM1_ICS_EN
|
1077 FE_GDM1_TCS_EN
| FE_GDM1_UCS_EN
),
1080 fe_w32(fe_r32(FE_GDMA1_FWD_CFG
) & ~(FE_GDM1_ICS_EN
|
1081 FE_GDM1_TCS_EN
| FE_GDM1_UCS_EN
),
1085 static void fe_txcsum_config(bool enable
)
1088 fe_w32(fe_r32(FE_CDMA_CSG_CFG
) | (FE_ICS_GEN_EN
|
1089 FE_TCS_GEN_EN
| FE_UCS_GEN_EN
),
1092 fe_w32(fe_r32(FE_CDMA_CSG_CFG
) & ~(FE_ICS_GEN_EN
|
1093 FE_TCS_GEN_EN
| FE_UCS_GEN_EN
),
1097 void fe_csum_config(struct fe_priv
*priv
)
1099 struct net_device
*dev
= priv_netdev(priv
);
1101 fe_txcsum_config((dev
->features
& NETIF_F_IP_CSUM
));
1102 fe_rxcsum_config((dev
->features
& NETIF_F_RXCSUM
));
1105 static int fe_hw_init(struct net_device
*dev
)
1107 struct fe_priv
*priv
= netdev_priv(dev
);
1110 err
= devm_request_irq(priv
->device
, dev
->irq
, fe_handle_irq
, 0,
1111 dev_name(priv
->device
), dev
);
1115 if (priv
->soc
->set_mac
)
1116 priv
->soc
->set_mac(priv
, dev
->dev_addr
);
1118 fe_hw_set_macaddr(priv
, dev
->dev_addr
);
1120 /* disable delay interrupt */
1121 fe_reg_w32(0, FE_REG_DLY_INT_CFG
);
1123 fe_int_disable(priv
->soc
->tx_int
| priv
->soc
->rx_int
);
1125 /* frame engine will push VLAN tag regarding to VIDX feild in Tx desc. */
1126 if (fe_reg_table
[FE_REG_FE_DMA_VID_BASE
])
1127 for (i
= 0; i
< 16; i
+= 2)
1128 fe_w32(((i
+ 1) << 16) + i
,
1129 fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
1132 BUG_ON(!priv
->soc
->fwd_config
);
1133 if (priv
->soc
->fwd_config(priv
))
1134 netdev_err(dev
, "unable to get clock\n");
1136 if (fe_reg_table
[FE_REG_FE_RST_GL
]) {
1137 fe_reg_w32(1, FE_REG_FE_RST_GL
);
1138 fe_reg_w32(0, FE_REG_FE_RST_GL
);
1144 static int fe_open(struct net_device
*dev
)
1146 struct fe_priv
*priv
= netdev_priv(dev
);
1147 unsigned long flags
;
1151 err
= fe_init_dma(priv
);
1155 spin_lock_irqsave(&priv
->page_lock
, flags
);
1157 val
= FE_TX_WB_DDONE
| FE_RX_DMA_EN
| FE_TX_DMA_EN
;
1158 if (priv
->flags
& FE_FLAG_RX_2B_OFFSET
)
1159 val
|= FE_RX_2B_OFFSET
;
1160 val
|= priv
->soc
->pdma_glo_cfg
;
1161 fe_reg_w32(val
, FE_REG_PDMA_GLO_CFG
);
1163 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
1166 priv
->phy
->start(priv
);
1168 if (priv
->soc
->has_carrier
&& priv
->soc
->has_carrier(priv
))
1169 netif_carrier_on(dev
);
1171 napi_enable(&priv
->rx_napi
);
1172 fe_int_enable(priv
->soc
->tx_int
| priv
->soc
->rx_int
);
1173 netif_start_queue(dev
);
1182 static int fe_stop(struct net_device
*dev
)
1184 struct fe_priv
*priv
= netdev_priv(dev
);
1185 unsigned long flags
;
1188 netif_tx_disable(dev
);
1189 fe_int_disable(priv
->soc
->tx_int
| priv
->soc
->rx_int
);
1190 napi_disable(&priv
->rx_napi
);
1193 priv
->phy
->stop(priv
);
1195 spin_lock_irqsave(&priv
->page_lock
, flags
);
1197 fe_reg_w32(fe_reg_r32(FE_REG_PDMA_GLO_CFG
) &
1198 ~(FE_TX_WB_DDONE
| FE_RX_DMA_EN
| FE_TX_DMA_EN
),
1199 FE_REG_PDMA_GLO_CFG
);
1200 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
1203 for (i
= 0; i
< 10; i
++) {
1204 if (fe_reg_r32(FE_REG_PDMA_GLO_CFG
) &
1205 (FE_TX_DMA_BUSY
| FE_RX_DMA_BUSY
)) {
1217 static int __init
fe_init(struct net_device
*dev
)
1219 struct fe_priv
*priv
= netdev_priv(dev
);
1220 struct device_node
*port
;
1223 BUG_ON(!priv
->soc
->reset_fe
);
1224 priv
->soc
->reset_fe();
1226 if (priv
->soc
->switch_init
)
1227 priv
->soc
->switch_init(priv
);
1229 of_get_mac_address_mtd(priv
->device
->of_node
, dev
->dev_addr
);
1230 /*If the mac address is invalid, use random mac address */
1231 if (!is_valid_ether_addr(dev
->dev_addr
)) {
1232 random_ether_addr(dev
->dev_addr
);
1233 dev_err(priv
->device
, "generated random MAC address %pM\n",
1237 err
= fe_mdio_init(priv
);
1241 if (priv
->soc
->port_init
)
1242 for_each_child_of_node(priv
->device
->of_node
, port
)
1243 if (of_device_is_compatible(port
, "ralink,eth-port") && of_device_is_available(port
))
1244 priv
->soc
->port_init(priv
, port
);
1247 err
= priv
->phy
->connect(priv
);
1249 goto err_phy_disconnect
;
1252 err
= fe_hw_init(dev
);
1254 goto err_phy_disconnect
;
1256 if (priv
->soc
->switch_config
)
1257 priv
->soc
->switch_config(priv
);
1263 priv
->phy
->disconnect(priv
);
1264 fe_mdio_cleanup(priv
);
1269 static void fe_uninit(struct net_device
*dev
)
1271 struct fe_priv
*priv
= netdev_priv(dev
);
1274 priv
->phy
->disconnect(priv
);
1275 fe_mdio_cleanup(priv
);
1277 fe_reg_w32(0, FE_REG_FE_INT_ENABLE
);
1278 free_irq(dev
->irq
, dev
);
1281 static int fe_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1283 struct fe_priv
*priv
= netdev_priv(dev
);
1290 return phy_ethtool_ioctl(priv
->phy_dev
,
1291 (void *) ifr
->ifr_data
);
1295 return phy_mii_ioctl(priv
->phy_dev
, ifr
, cmd
);
1303 static int fe_change_mtu(struct net_device
*dev
, int new_mtu
)
1305 struct fe_priv
*priv
= netdev_priv(dev
);
1306 int frag_size
, old_mtu
;
1309 if (!(priv
->flags
& FE_FLAG_JUMBO_FRAME
))
1310 return eth_change_mtu(dev
, new_mtu
);
1312 frag_size
= fe_max_frag_size(new_mtu
);
1313 if (new_mtu
< 68 || frag_size
> PAGE_SIZE
)
1319 /* return early if the buffer sizes will not change */
1320 if (old_mtu
<= ETH_DATA_LEN
&& new_mtu
<= ETH_DATA_LEN
)
1322 if (old_mtu
> ETH_DATA_LEN
&& new_mtu
> ETH_DATA_LEN
)
1325 if (new_mtu
<= ETH_DATA_LEN
)
1326 priv
->frag_size
= fe_max_frag_size(ETH_DATA_LEN
);
1328 priv
->frag_size
= PAGE_SIZE
;
1329 priv
->rx_buf_size
= fe_max_buf_size(priv
->frag_size
);
1331 if (!netif_running(dev
))
1335 fwd_cfg
= fe_r32(FE_GDMA1_FWD_CFG
);
1336 if (new_mtu
<= ETH_DATA_LEN
)
1337 fwd_cfg
&= ~FE_GDM1_JMB_EN
;
1339 fwd_cfg
&= ~(FE_GDM1_JMB_LEN_MASK
<< FE_GDM1_JMB_LEN_SHIFT
);
1340 fwd_cfg
|= (DIV_ROUND_UP(frag_size
, 1024) <<
1341 FE_GDM1_JMB_LEN_SHIFT
) | FE_GDM1_JMB_EN
;
1343 fe_w32(fwd_cfg
, FE_GDMA1_FWD_CFG
);
1345 return fe_open(dev
);
1348 static const struct net_device_ops fe_netdev_ops
= {
1349 .ndo_init
= fe_init
,
1350 .ndo_uninit
= fe_uninit
,
1351 .ndo_open
= fe_open
,
1352 .ndo_stop
= fe_stop
,
1353 .ndo_start_xmit
= fe_start_xmit
,
1354 .ndo_set_mac_address
= fe_set_mac_address
,
1355 .ndo_validate_addr
= eth_validate_addr
,
1356 .ndo_do_ioctl
= fe_do_ioctl
,
1357 .ndo_change_mtu
= fe_change_mtu
,
1358 .ndo_tx_timeout
= fe_tx_timeout
,
1359 .ndo_get_stats64
= fe_get_stats64
,
1360 .ndo_vlan_rx_add_vid
= fe_vlan_rx_add_vid
,
1361 .ndo_vlan_rx_kill_vid
= fe_vlan_rx_kill_vid
,
1362 #ifdef CONFIG_NET_POLL_CONTROLLER
1363 .ndo_poll_controller
= fe_poll_controller
,
1367 static void fe_reset_pending(struct fe_priv
*priv
)
1369 struct net_device
*dev
= priv
->netdev
;
1382 netif_alert(priv
, ifup
, dev
,
1383 "Driver up/down cycle failed, closing device.\n");
1388 static const struct fe_work_t fe_work
[] = {
1389 {FE_FLAG_RESET_PENDING
, fe_reset_pending
},
1392 static void fe_pending_work(struct work_struct
*work
)
1394 struct fe_priv
*priv
= container_of(work
, struct fe_priv
, pending_work
);
1398 for (i
= 0; i
< ARRAY_SIZE(fe_work
); i
++) {
1399 pending
= test_and_clear_bit(fe_work
[i
].bitnr
,
1400 priv
->pending_flags
);
1402 fe_work
[i
].action(priv
);
1406 static int fe_probe(struct platform_device
*pdev
)
1408 struct resource
*res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1409 const struct of_device_id
*match
;
1410 struct fe_soc_data
*soc
;
1411 struct net_device
*netdev
;
1412 struct fe_priv
*priv
;
1414 int err
, napi_weight
;
1416 device_reset(&pdev
->dev
);
1418 match
= of_match_device(of_fe_match
, &pdev
->dev
);
1419 soc
= (struct fe_soc_data
*) match
->data
;
1422 fe_reg_table
= soc
->reg_table
;
1424 soc
->reg_table
= fe_reg_table
;
1426 fe_base
= devm_ioremap_resource(&pdev
->dev
, res
);
1428 err
= -EADDRNOTAVAIL
;
1432 netdev
= alloc_etherdev(sizeof(*priv
));
1434 dev_err(&pdev
->dev
, "alloc_etherdev failed\n");
1439 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
1440 netdev
->netdev_ops
= &fe_netdev_ops
;
1441 netdev
->base_addr
= (unsigned long) fe_base
;
1443 netdev
->irq
= platform_get_irq(pdev
, 0);
1444 if (netdev
->irq
< 0) {
1445 dev_err(&pdev
->dev
, "no IRQ resource found\n");
1451 soc
->init_data(soc
, netdev
);
1452 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
1453 netdev
->hw_features
|= NETIF_F_HW_VLAN_CTAG_RX
;
1454 netdev
->vlan_features
= netdev
->hw_features
&
1455 ~(NETIF_F_HW_VLAN_CTAG_TX
| NETIF_F_HW_VLAN_CTAG_RX
);
1456 netdev
->features
|= netdev
->hw_features
;
1458 /* fake rx vlan filter func. to support tx vlan offload func */
1459 if (fe_reg_table
[FE_REG_FE_DMA_VID_BASE
])
1460 netdev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1462 priv
= netdev_priv(netdev
);
1463 spin_lock_init(&priv
->page_lock
);
1464 if (fe_reg_table
[FE_REG_FE_COUNTER_BASE
]) {
1465 priv
->hw_stats
= kzalloc(sizeof(*priv
->hw_stats
), GFP_KERNEL
);
1466 if (!priv
->hw_stats
) {
1470 spin_lock_init(&priv
->hw_stats
->stats_lock
);
1473 sysclk
= devm_clk_get(&pdev
->dev
, NULL
);
1474 if (!IS_ERR(sysclk
))
1475 priv
->sysclk
= clk_get_rate(sysclk
);
1477 priv
->netdev
= netdev
;
1478 priv
->device
= &pdev
->dev
;
1480 priv
->msg_enable
= netif_msg_init(fe_msg_level
, FE_DEFAULT_MSG_ENABLE
);
1481 priv
->frag_size
= fe_max_frag_size(ETH_DATA_LEN
);
1482 priv
->rx_buf_size
= fe_max_buf_size(priv
->frag_size
);
1483 priv
->tx_ring_size
= priv
->rx_ring_size
= NUM_DMA_DESC
;
1484 INIT_WORK(&priv
->pending_work
, fe_pending_work
);
1487 if (priv
->flags
& FE_FLAG_NAPI_WEIGHT
) {
1489 priv
->tx_ring_size
*= 4;
1490 priv
->rx_ring_size
*= 4;
1492 netif_napi_add(netdev
, &priv
->rx_napi
, fe_poll
, napi_weight
);
1493 fe_set_ethtool_ops(netdev
);
1495 err
= register_netdev(netdev
);
1497 dev_err(&pdev
->dev
, "error bringing up device\n");
1501 platform_set_drvdata(pdev
, netdev
);
1503 netif_info(priv
, probe
, netdev
, "ralink at 0x%08lx, irq %d\n",
1504 netdev
->base_addr
, netdev
->irq
);
1509 free_netdev(netdev
);
1511 devm_iounmap(&pdev
->dev
, fe_base
);
1516 static int fe_remove(struct platform_device
*pdev
)
1518 struct net_device
*dev
= platform_get_drvdata(pdev
);
1519 struct fe_priv
*priv
= netdev_priv(dev
);
1521 netif_napi_del(&priv
->rx_napi
);
1523 kfree(priv
->hw_stats
);
1525 cancel_work_sync(&priv
->pending_work
);
1527 unregister_netdev(dev
);
1529 platform_set_drvdata(pdev
, NULL
);
1534 static struct platform_driver fe_driver
= {
1536 .remove
= fe_remove
,
1538 .name
= "ralink_soc_eth",
1539 .owner
= THIS_MODULE
,
1540 .of_match_table
= of_fe_match
,
1544 static int __init
init_rtfe(void)
1552 ret
= platform_driver_register(&fe_driver
);
1559 static void __exit
exit_rtfe(void)
1561 platform_driver_unregister(&fe_driver
);
1565 module_init(init_rtfe
);
1566 module_exit(exit_rtfe
);
1568 MODULE_LICENSE("GPL");
1569 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
1570 MODULE_DESCRIPTION("Ethernet driver for Ralink SoC");
1571 MODULE_VERSION(FE_DRV_VERSION
);