1 /* This program is free software; you can redistribute it and/or modify
2 * it under the terms of the GNU General Public License as published by
3 * the Free Software Foundation; version 2 of the License
5 * This program is distributed in the hope that it will be useful,
6 * but WITHOUT ANY WARRANTY; without even the implied warranty of
7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
8 * GNU General Public License for more details.
10 * Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org>
11 * Copyright (C) 2009-2015 Felix Fietkau <nbd@nbd.name>
12 * Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/init.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/ethtool.h>
23 #include <linux/platform_device.h>
24 #include <linux/of_device.h>
25 #include <linux/clk.h>
26 #include <linux/of_net.h>
27 #include <linux/of_mdio.h>
28 #include <linux/if_vlan.h>
29 #include <linux/reset.h>
30 #include <linux/tcp.h>
32 #include <linux/bug.h>
33 #include <linux/netfilter.h>
34 #include <net/netfilter/nf_flow_table.h>
36 #include <asm/mach-ralink/ralink_regs.h>
38 #include "mtk_eth_soc.h"
42 #define MAX_RX_LENGTH 1536
43 #define FE_RX_ETH_HLEN (VLAN_ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN)
44 #define FE_RX_HLEN (NET_SKB_PAD + FE_RX_ETH_HLEN + NET_IP_ALIGN)
45 #define DMA_DUMMY_DESC 0xffffffff
46 #define FE_DEFAULT_MSG_ENABLE \
56 #define TX_DMA_DESP2_DEF (TX_DMA_LS0 | TX_DMA_DONE)
57 #define TX_DMA_DESP4_DEF (TX_DMA_QN(3) | TX_DMA_PN(1))
58 #define NEXT_TX_DESP_IDX(X) (((X) + 1) & (ring->tx_ring_size - 1))
59 #define NEXT_RX_DESP_IDX(X) (((X) + 1) & (ring->rx_ring_size - 1))
61 #define SYSC_REG_RSTCTRL 0x34
63 static int fe_msg_level
= -1;
64 module_param_named(msg_level
, fe_msg_level
, int, 0);
65 MODULE_PARM_DESC(msg_level
, "Message level (-1=defaults,0=none,...,16=all)");
67 static const u16 fe_reg_table_default
[FE_REG_COUNT
] = {
68 [FE_REG_PDMA_GLO_CFG
] = FE_PDMA_GLO_CFG
,
69 [FE_REG_PDMA_RST_CFG
] = FE_PDMA_RST_CFG
,
70 [FE_REG_DLY_INT_CFG
] = FE_DLY_INT_CFG
,
71 [FE_REG_TX_BASE_PTR0
] = FE_TX_BASE_PTR0
,
72 [FE_REG_TX_MAX_CNT0
] = FE_TX_MAX_CNT0
,
73 [FE_REG_TX_CTX_IDX0
] = FE_TX_CTX_IDX0
,
74 [FE_REG_TX_DTX_IDX0
] = FE_TX_DTX_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_RX_DRX_IDX0
] = FE_RX_DRX_IDX0
,
79 [FE_REG_FE_INT_ENABLE
] = FE_FE_INT_ENABLE
,
80 [FE_REG_FE_INT_STATUS
] = FE_FE_INT_STATUS
,
81 [FE_REG_FE_DMA_VID_BASE
] = FE_DMA_VID0
,
82 [FE_REG_FE_COUNTER_BASE
] = FE_GDMA1_TX_GBCNT
,
83 [FE_REG_FE_RST_GL
] = FE_FE_RST_GL
,
86 static const u16
*fe_reg_table
= fe_reg_table_default
;
90 void (*action
)(struct fe_priv
*);
93 static void __iomem
*fe_base
;
95 void fe_w32(u32 val
, unsigned reg
)
97 __raw_writel(val
, fe_base
+ reg
);
100 u32
fe_r32(unsigned reg
)
102 return __raw_readl(fe_base
+ reg
);
105 void fe_reg_w32(u32 val
, enum fe_reg reg
)
107 fe_w32(val
, fe_reg_table
[reg
]);
110 u32
fe_reg_r32(enum fe_reg reg
)
112 return fe_r32(fe_reg_table
[reg
]);
115 void fe_m32(struct fe_priv
*eth
, u32 clear
, u32 set
, unsigned reg
)
119 spin_lock(ð
->page_lock
);
120 val
= __raw_readl(fe_base
+ reg
);
123 __raw_writel(val
, fe_base
+ reg
);
124 spin_unlock(ð
->page_lock
);
127 void fe_reset(u32 reset_bits
)
131 t
= rt_sysc_r32(SYSC_REG_RSTCTRL
);
133 rt_sysc_w32(t
, SYSC_REG_RSTCTRL
);
134 usleep_range(10, 20);
137 rt_sysc_w32(t
, SYSC_REG_RSTCTRL
);
138 usleep_range(10, 20);
141 static inline void fe_int_disable(u32 mask
)
143 fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE
) & ~mask
,
144 FE_REG_FE_INT_ENABLE
);
146 fe_reg_r32(FE_REG_FE_INT_ENABLE
);
149 static inline void fe_int_enable(u32 mask
)
151 fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE
) | mask
,
152 FE_REG_FE_INT_ENABLE
);
154 fe_reg_r32(FE_REG_FE_INT_ENABLE
);
157 static inline void fe_hw_set_macaddr(struct fe_priv
*priv
, unsigned char *mac
)
161 spin_lock_irqsave(&priv
->page_lock
, flags
);
162 fe_w32((mac
[0] << 8) | mac
[1], FE_GDMA1_MAC_ADRH
);
163 fe_w32((mac
[2] << 24) | (mac
[3] << 16) | (mac
[4] << 8) | mac
[5],
165 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
168 static int fe_set_mac_address(struct net_device
*dev
, void *p
)
170 int ret
= eth_mac_addr(dev
, p
);
173 struct fe_priv
*priv
= netdev_priv(dev
);
175 if (priv
->soc
->set_mac
)
176 priv
->soc
->set_mac(priv
, dev
->dev_addr
);
178 fe_hw_set_macaddr(priv
, p
);
184 static inline int fe_max_frag_size(int mtu
)
186 /* make sure buf_size will be at least MAX_RX_LENGTH */
187 if (mtu
+ FE_RX_ETH_HLEN
< MAX_RX_LENGTH
)
188 mtu
= MAX_RX_LENGTH
- FE_RX_ETH_HLEN
;
190 return SKB_DATA_ALIGN(FE_RX_HLEN
+ mtu
) +
191 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
194 static inline int fe_max_buf_size(int frag_size
)
196 int buf_size
= frag_size
- NET_SKB_PAD
- NET_IP_ALIGN
-
197 SKB_DATA_ALIGN(sizeof(struct skb_shared_info
));
199 BUG_ON(buf_size
< MAX_RX_LENGTH
);
203 static inline void fe_get_rxd(struct fe_rx_dma
*rxd
, struct fe_rx_dma
*dma_rxd
)
205 rxd
->rxd1
= dma_rxd
->rxd1
;
206 rxd
->rxd2
= dma_rxd
->rxd2
;
207 rxd
->rxd3
= dma_rxd
->rxd3
;
208 rxd
->rxd4
= dma_rxd
->rxd4
;
211 static inline void fe_set_txd(struct fe_tx_dma
*txd
, struct fe_tx_dma
*dma_txd
)
213 dma_txd
->txd1
= txd
->txd1
;
214 dma_txd
->txd3
= txd
->txd3
;
215 dma_txd
->txd4
= txd
->txd4
;
216 /* clean dma done flag last */
217 dma_txd
->txd2
= txd
->txd2
;
220 static void fe_clean_rx(struct fe_priv
*priv
)
222 struct fe_rx_ring
*ring
= &priv
->rx_ring
;
227 for (i
= 0; i
< ring
->rx_ring_size
; i
++)
228 if (ring
->rx_data
[i
]) {
229 if (ring
->rx_dma
&& ring
->rx_dma
[i
].rxd1
)
230 dma_unmap_single(&priv
->netdev
->dev
,
231 ring
->rx_dma
[i
].rxd1
,
234 skb_free_frag(ring
->rx_data
[i
]);
237 kfree(ring
->rx_data
);
238 ring
->rx_data
= NULL
;
242 dma_free_coherent(&priv
->netdev
->dev
,
243 ring
->rx_ring_size
* sizeof(*ring
->rx_dma
),
249 if (!ring
->frag_cache
.va
)
252 page
= virt_to_page(ring
->frag_cache
.va
);
253 __page_frag_cache_drain(page
, ring
->frag_cache
.pagecnt_bias
);
254 memset(&ring
->frag_cache
, 0, sizeof(ring
->frag_cache
));
257 static int fe_alloc_rx(struct fe_priv
*priv
)
259 struct net_device
*netdev
= priv
->netdev
;
260 struct fe_rx_ring
*ring
= &priv
->rx_ring
;
263 ring
->rx_data
= kcalloc(ring
->rx_ring_size
, sizeof(*ring
->rx_data
),
268 for (i
= 0; i
< ring
->rx_ring_size
; i
++) {
269 ring
->rx_data
[i
] = page_frag_alloc(&ring
->frag_cache
,
272 if (!ring
->rx_data
[i
])
276 ring
->rx_dma
= dma_alloc_coherent(&netdev
->dev
,
277 ring
->rx_ring_size
* sizeof(*ring
->rx_dma
),
279 GFP_ATOMIC
| __GFP_ZERO
);
283 if (priv
->flags
& FE_FLAG_RX_2B_OFFSET
)
287 for (i
= 0; i
< ring
->rx_ring_size
; i
++) {
288 dma_addr_t dma_addr
= dma_map_single(&netdev
->dev
,
289 ring
->rx_data
[i
] + NET_SKB_PAD
+ pad
,
292 if (unlikely(dma_mapping_error(&netdev
->dev
, dma_addr
)))
294 ring
->rx_dma
[i
].rxd1
= (unsigned int)dma_addr
;
296 if (priv
->flags
& FE_FLAG_RX_SG_DMA
)
297 ring
->rx_dma
[i
].rxd2
= RX_DMA_PLEN0(ring
->rx_buf_size
);
299 ring
->rx_dma
[i
].rxd2
= RX_DMA_LSO
;
301 ring
->rx_calc_idx
= ring
->rx_ring_size
- 1;
302 /* make sure that all changes to the dma ring are flushed before we
307 fe_reg_w32(ring
->rx_phys
, FE_REG_RX_BASE_PTR0
);
308 fe_reg_w32(ring
->rx_ring_size
, FE_REG_RX_MAX_CNT0
);
309 fe_reg_w32(ring
->rx_calc_idx
, FE_REG_RX_CALC_IDX0
);
310 fe_reg_w32(FE_PST_DRX_IDX0
, FE_REG_PDMA_RST_CFG
);
318 static void fe_txd_unmap(struct device
*dev
, struct fe_tx_buf
*tx_buf
)
320 if (dma_unmap_len(tx_buf
, dma_len0
))
322 dma_unmap_addr(tx_buf
, dma_addr0
),
323 dma_unmap_len(tx_buf
, dma_len0
),
326 if (dma_unmap_len(tx_buf
, dma_len1
))
328 dma_unmap_addr(tx_buf
, dma_addr1
),
329 dma_unmap_len(tx_buf
, dma_len1
),
332 dma_unmap_len_set(tx_buf
, dma_addr0
, 0);
333 dma_unmap_len_set(tx_buf
, dma_addr1
, 0);
334 if (tx_buf
->skb
&& (tx_buf
->skb
!= (struct sk_buff
*)DMA_DUMMY_DESC
))
335 dev_kfree_skb_any(tx_buf
->skb
);
339 static void fe_clean_tx(struct fe_priv
*priv
)
342 struct device
*dev
= &priv
->netdev
->dev
;
343 struct fe_tx_ring
*ring
= &priv
->tx_ring
;
346 for (i
= 0; i
< ring
->tx_ring_size
; i
++)
347 fe_txd_unmap(dev
, &ring
->tx_buf
[i
]);
353 dma_free_coherent(dev
,
354 ring
->tx_ring_size
* sizeof(*ring
->tx_dma
),
360 netdev_reset_queue(priv
->netdev
);
363 static int fe_alloc_tx(struct fe_priv
*priv
)
366 struct fe_tx_ring
*ring
= &priv
->tx_ring
;
368 ring
->tx_free_idx
= 0;
369 ring
->tx_next_idx
= 0;
370 ring
->tx_thresh
= max((unsigned long)ring
->tx_ring_size
>> 2,
373 ring
->tx_buf
= kcalloc(ring
->tx_ring_size
, sizeof(*ring
->tx_buf
),
378 ring
->tx_dma
= dma_alloc_coherent(&priv
->netdev
->dev
,
379 ring
->tx_ring_size
* sizeof(*ring
->tx_dma
),
381 GFP_ATOMIC
| __GFP_ZERO
);
385 for (i
= 0; i
< ring
->tx_ring_size
; i
++) {
386 if (priv
->soc
->tx_dma
)
387 priv
->soc
->tx_dma(&ring
->tx_dma
[i
]);
388 ring
->tx_dma
[i
].txd2
= TX_DMA_DESP2_DEF
;
390 /* make sure that all changes to the dma ring are flushed before we
395 fe_reg_w32(ring
->tx_phys
, FE_REG_TX_BASE_PTR0
);
396 fe_reg_w32(ring
->tx_ring_size
, FE_REG_TX_MAX_CNT0
);
397 fe_reg_w32(0, FE_REG_TX_CTX_IDX0
);
398 fe_reg_w32(FE_PST_DTX_IDX0
, FE_REG_PDMA_RST_CFG
);
406 static int fe_init_dma(struct fe_priv
*priv
)
410 err
= fe_alloc_tx(priv
);
414 err
= fe_alloc_rx(priv
);
421 static void fe_free_dma(struct fe_priv
*priv
)
427 void fe_stats_update(struct fe_priv
*priv
)
429 struct fe_hw_stats
*hwstats
= priv
->hw_stats
;
430 unsigned int base
= fe_reg_table
[FE_REG_FE_COUNTER_BASE
];
433 u64_stats_update_begin(&hwstats
->syncp
);
435 if (IS_ENABLED(CONFIG_SOC_MT7621
)) {
436 hwstats
->rx_bytes
+= fe_r32(base
);
437 stats
= fe_r32(base
+ 0x04);
439 hwstats
->rx_bytes
+= (stats
<< 32);
440 hwstats
->rx_packets
+= fe_r32(base
+ 0x08);
441 hwstats
->rx_overflow
+= fe_r32(base
+ 0x10);
442 hwstats
->rx_fcs_errors
+= fe_r32(base
+ 0x14);
443 hwstats
->rx_short_errors
+= fe_r32(base
+ 0x18);
444 hwstats
->rx_long_errors
+= fe_r32(base
+ 0x1c);
445 hwstats
->rx_checksum_errors
+= fe_r32(base
+ 0x20);
446 hwstats
->rx_flow_control_packets
+= fe_r32(base
+ 0x24);
447 hwstats
->tx_skip
+= fe_r32(base
+ 0x28);
448 hwstats
->tx_collisions
+= fe_r32(base
+ 0x2c);
449 hwstats
->tx_bytes
+= fe_r32(base
+ 0x30);
450 stats
= fe_r32(base
+ 0x34);
452 hwstats
->tx_bytes
+= (stats
<< 32);
453 hwstats
->tx_packets
+= fe_r32(base
+ 0x38);
455 hwstats
->tx_bytes
+= fe_r32(base
);
456 hwstats
->tx_packets
+= fe_r32(base
+ 0x04);
457 hwstats
->tx_skip
+= fe_r32(base
+ 0x08);
458 hwstats
->tx_collisions
+= fe_r32(base
+ 0x0c);
459 hwstats
->rx_bytes
+= fe_r32(base
+ 0x20);
460 hwstats
->rx_packets
+= fe_r32(base
+ 0x24);
461 hwstats
->rx_overflow
+= fe_r32(base
+ 0x28);
462 hwstats
->rx_fcs_errors
+= fe_r32(base
+ 0x2c);
463 hwstats
->rx_short_errors
+= fe_r32(base
+ 0x30);
464 hwstats
->rx_long_errors
+= fe_r32(base
+ 0x34);
465 hwstats
->rx_checksum_errors
+= fe_r32(base
+ 0x38);
466 hwstats
->rx_flow_control_packets
+= fe_r32(base
+ 0x3c);
469 u64_stats_update_end(&hwstats
->syncp
);
472 static void fe_get_stats64(struct net_device
*dev
,
473 struct rtnl_link_stats64
*storage
)
475 struct fe_priv
*priv
= netdev_priv(dev
);
476 struct fe_hw_stats
*hwstats
= priv
->hw_stats
;
477 unsigned int base
= fe_reg_table
[FE_REG_FE_COUNTER_BASE
];
481 netdev_stats_to_stats64(storage
, &dev
->stats
);
485 if (netif_running(dev
) && netif_device_present(dev
)) {
486 if (spin_trylock_bh(&hwstats
->stats_lock
)) {
487 fe_stats_update(priv
);
488 spin_unlock_bh(&hwstats
->stats_lock
);
493 start
= u64_stats_fetch_begin_irq(&hwstats
->syncp
);
494 storage
->rx_packets
= hwstats
->rx_packets
;
495 storage
->tx_packets
= hwstats
->tx_packets
;
496 storage
->rx_bytes
= hwstats
->rx_bytes
;
497 storage
->tx_bytes
= hwstats
->tx_bytes
;
498 storage
->collisions
= hwstats
->tx_collisions
;
499 storage
->rx_length_errors
= hwstats
->rx_short_errors
+
500 hwstats
->rx_long_errors
;
501 storage
->rx_over_errors
= hwstats
->rx_overflow
;
502 storage
->rx_crc_errors
= hwstats
->rx_fcs_errors
;
503 storage
->rx_errors
= hwstats
->rx_checksum_errors
;
504 storage
->tx_aborted_errors
= hwstats
->tx_skip
;
505 } while (u64_stats_fetch_retry_irq(&hwstats
->syncp
, start
));
507 storage
->tx_errors
= priv
->netdev
->stats
.tx_errors
;
508 storage
->rx_dropped
= priv
->netdev
->stats
.rx_dropped
;
509 storage
->tx_dropped
= priv
->netdev
->stats
.tx_dropped
;
512 static int fe_vlan_rx_add_vid(struct net_device
*dev
,
513 __be16 proto
, u16 vid
)
515 struct fe_priv
*priv
= netdev_priv(dev
);
516 u32 idx
= (vid
& 0xf);
519 if (!((fe_reg_table
[FE_REG_FE_DMA_VID_BASE
]) &&
520 (dev
->features
& NETIF_F_HW_VLAN_CTAG_TX
)))
523 if (test_bit(idx
, &priv
->vlan_map
)) {
524 netdev_warn(dev
, "disable tx vlan offload\n");
525 dev
->wanted_features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
526 netdev_update_features(dev
);
528 vlan_cfg
= fe_r32(fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
532 vlan_cfg
|= (vid
<< 16);
534 vlan_cfg
&= 0xffff0000;
537 fe_w32(vlan_cfg
, fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
539 set_bit(idx
, &priv
->vlan_map
);
545 static int fe_vlan_rx_kill_vid(struct net_device
*dev
,
546 __be16 proto
, u16 vid
)
548 struct fe_priv
*priv
= netdev_priv(dev
);
549 u32 idx
= (vid
& 0xf);
551 if (!((fe_reg_table
[FE_REG_FE_DMA_VID_BASE
]) &&
552 (dev
->features
& NETIF_F_HW_VLAN_CTAG_TX
)))
555 clear_bit(idx
, &priv
->vlan_map
);
560 static inline u32
fe_empty_txd(struct fe_tx_ring
*ring
)
563 return (u32
)(ring
->tx_ring_size
-
564 ((ring
->tx_next_idx
- ring
->tx_free_idx
) &
565 (ring
->tx_ring_size
- 1)));
568 struct fe_map_state
{
570 struct fe_tx_dma txd
;
576 static void fe_tx_dma_write_desc(struct fe_tx_ring
*ring
, struct fe_map_state
*st
)
578 fe_set_txd(&st
->txd
, &ring
->tx_dma
[st
->ring_idx
]);
579 memset(&st
->txd
, 0, sizeof(st
->txd
));
580 st
->txd
.txd4
= st
->def_txd4
;
581 st
->ring_idx
= NEXT_TX_DESP_IDX(st
->ring_idx
);
584 static int __fe_tx_dma_map_page(struct fe_tx_ring
*ring
, struct fe_map_state
*st
,
585 struct page
*page
, size_t offset
, size_t size
)
587 struct device
*dev
= st
->dev
;
588 struct fe_tx_buf
*tx_buf
;
589 dma_addr_t mapped_addr
;
591 mapped_addr
= dma_map_page(dev
, page
, offset
, size
, DMA_TO_DEVICE
);
592 if (unlikely(dma_mapping_error(dev
, mapped_addr
)))
595 if (st
->i
&& !(st
->i
& 1))
596 fe_tx_dma_write_desc(ring
, st
);
598 tx_buf
= &ring
->tx_buf
[st
->ring_idx
];
600 st
->txd
.txd3
= mapped_addr
;
601 st
->txd
.txd2
|= TX_DMA_PLEN1(size
);
602 dma_unmap_addr_set(tx_buf
, dma_addr1
, mapped_addr
);
603 dma_unmap_len_set(tx_buf
, dma_len1
, size
);
605 tx_buf
->skb
= (struct sk_buff
*)DMA_DUMMY_DESC
;
606 st
->txd
.txd1
= mapped_addr
;
607 st
->txd
.txd2
= TX_DMA_PLEN0(size
);
608 dma_unmap_addr_set(tx_buf
, dma_addr0
, mapped_addr
);
609 dma_unmap_len_set(tx_buf
, dma_len0
, size
);
616 static int fe_tx_dma_map_page(struct fe_tx_ring
*ring
, struct fe_map_state
*st
,
617 struct page
*page
, size_t offset
, size_t size
)
623 cur_size
= min_t(size_t, size
, TX_DMA_BUF_LEN
);
625 ret
= __fe_tx_dma_map_page(ring
, st
, page
, offset
, cur_size
);
636 static int fe_tx_dma_map_skb(struct fe_tx_ring
*ring
, struct fe_map_state
*st
,
639 struct page
*page
= virt_to_page(skb
->data
);
640 size_t offset
= offset_in_page(skb
->data
);
641 size_t size
= skb_headlen(skb
);
643 return fe_tx_dma_map_page(ring
, st
, page
, offset
, size
);
646 static inline struct sk_buff
*
647 fe_next_frag(struct sk_buff
*head
, struct sk_buff
*skb
)
652 if (skb_has_frag_list(skb
))
653 return skb_shinfo(skb
)->frag_list
;
659 static int fe_tx_map_dma(struct sk_buff
*skb
, struct net_device
*dev
,
660 int tx_num
, struct fe_tx_ring
*ring
)
662 struct fe_priv
*priv
= netdev_priv(dev
);
663 struct fe_map_state st
= {
665 .ring_idx
= ring
->tx_next_idx
,
667 struct sk_buff
*head
= skb
;
668 struct fe_tx_buf
*tx_buf
;
669 unsigned int nr_frags
;
672 /* init tx descriptor */
673 if (priv
->soc
->tx_dma
)
674 priv
->soc
->tx_dma(&st
.txd
);
676 st
.txd
.txd4
= TX_DMA_DESP4_DEF
;
677 st
.def_txd4
= st
.txd
.txd4
;
679 /* TX Checksum offload */
680 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
681 st
.txd
.txd4
|= TX_DMA_CHKSUM
;
683 /* VLAN header offload */
684 if (skb_vlan_tag_present(skb
)) {
685 u16 tag
= skb_vlan_tag_get(skb
);
687 if (IS_ENABLED(CONFIG_SOC_MT7621
))
688 st
.txd
.txd4
|= TX_DMA_INS_VLAN_MT7621
| tag
;
690 st
.txd
.txd4
|= TX_DMA_INS_VLAN
|
691 ((tag
>> VLAN_PRIO_SHIFT
) << 4) |
695 /* TSO: fill MSS info in tcp checksum field */
696 if (skb_is_gso(skb
)) {
697 if (skb_cow_head(skb
, 0)) {
698 netif_warn(priv
, tx_err
, dev
,
699 "GSO expand head fail.\n");
702 if (skb_shinfo(skb
)->gso_type
&
703 (SKB_GSO_TCPV4
| SKB_GSO_TCPV6
)) {
704 st
.txd
.txd4
|= TX_DMA_TSO
;
705 tcp_hdr(skb
)->check
= htons(skb_shinfo(skb
)->gso_size
);
710 if (skb_headlen(skb
) && fe_tx_dma_map_skb(ring
, &st
, skb
))
714 nr_frags
= skb_shinfo(skb
)->nr_frags
;
715 for (i
= 0; i
< nr_frags
; i
++) {
716 struct skb_frag_struct
*frag
;
718 frag
= &skb_shinfo(skb
)->frags
[i
];
719 if (fe_tx_dma_map_page(ring
, &st
, skb_frag_page(frag
),
720 frag
->page_offset
, skb_frag_size(frag
)))
724 skb
= fe_next_frag(head
, skb
);
728 /* set last segment */
730 st
.txd
.txd2
|= TX_DMA_LS0
;
732 st
.txd
.txd2
|= TX_DMA_LS1
;
734 /* store skb to cleanup */
735 tx_buf
= &ring
->tx_buf
[st
.ring_idx
];
738 netdev_sent_queue(dev
, head
->len
);
739 skb_tx_timestamp(head
);
741 fe_tx_dma_write_desc(ring
, &st
);
742 ring
->tx_next_idx
= st
.ring_idx
;
744 /* make sure that all changes to the dma ring are flushed before we
748 if (unlikely(fe_empty_txd(ring
) <= ring
->tx_thresh
)) {
749 netif_stop_queue(dev
);
751 if (unlikely(fe_empty_txd(ring
) > ring
->tx_thresh
))
752 netif_wake_queue(dev
);
755 if (netif_xmit_stopped(netdev_get_tx_queue(dev
, 0)) || !head
->xmit_more
)
756 fe_reg_w32(ring
->tx_next_idx
, FE_REG_TX_CTX_IDX0
);
761 j
= ring
->tx_next_idx
;
762 for (i
= 0; i
< tx_num
; i
++) {
764 fe_txd_unmap(&dev
->dev
, &ring
->tx_buf
[j
]);
765 ring
->tx_dma
[j
].txd2
= TX_DMA_DESP2_DEF
;
767 j
= NEXT_TX_DESP_IDX(j
);
769 /* make sure that all changes to the dma ring are flushed before we
778 static inline int fe_skb_padto(struct sk_buff
*skb
, struct fe_priv
*priv
)
784 if (unlikely(skb
->len
< VLAN_ETH_ZLEN
)) {
785 if ((priv
->flags
& FE_FLAG_PADDING_64B
) &&
786 !(priv
->flags
& FE_FLAG_PADDING_BUG
))
789 if (skb_vlan_tag_present(skb
))
791 else if (skb
->protocol
== cpu_to_be16(ETH_P_8021Q
))
793 else if (!(priv
->flags
& FE_FLAG_PADDING_64B
))
798 if (skb
->len
< len
) {
799 ret
= skb_pad(skb
, len
- skb
->len
);
803 skb_set_tail_pointer(skb
, len
);
810 static inline int fe_cal_txd_req(struct sk_buff
*skb
)
812 struct sk_buff
*head
= skb
;
814 struct skb_frag_struct
*frag
;
818 if (skb_is_gso(skb
)) {
819 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; i
++) {
820 frag
= &skb_shinfo(skb
)->frags
[i
];
821 nfrags
+= DIV_ROUND_UP(frag
->size
, TX_DMA_BUF_LEN
);
824 nfrags
+= skb_shinfo(skb
)->nr_frags
;
827 skb
= fe_next_frag(head
, skb
);
831 return DIV_ROUND_UP(nfrags
, 2);
834 static int fe_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
836 struct fe_priv
*priv
= netdev_priv(dev
);
837 struct fe_tx_ring
*ring
= &priv
->tx_ring
;
838 struct net_device_stats
*stats
= &dev
->stats
;
842 if (fe_skb_padto(skb
, priv
)) {
843 netif_warn(priv
, tx_err
, dev
, "tx padding failed!\n");
847 tx_num
= fe_cal_txd_req(skb
);
848 if (unlikely(fe_empty_txd(ring
) <= tx_num
)) {
849 netif_stop_queue(dev
);
850 netif_err(priv
, tx_queued
, dev
,
851 "Tx Ring full when queue awake!\n");
852 return NETDEV_TX_BUSY
;
855 if (fe_tx_map_dma(skb
, dev
, tx_num
, ring
) < 0) {
859 stats
->tx_bytes
+= len
;
865 static int fe_poll_rx(struct napi_struct
*napi
, int budget
,
866 struct fe_priv
*priv
, u32 rx_intr
)
868 struct net_device
*netdev
= priv
->netdev
;
869 struct net_device_stats
*stats
= &netdev
->stats
;
870 struct fe_soc_data
*soc
= priv
->soc
;
871 struct fe_rx_ring
*ring
= &priv
->rx_ring
;
872 int idx
= ring
->rx_calc_idx
;
876 struct fe_rx_dma
*rxd
, trxd
;
879 if (netdev
->features
& NETIF_F_RXCSUM
)
880 checksum_bit
= soc
->checksum_bit
;
884 if (priv
->flags
& FE_FLAG_RX_2B_OFFSET
)
889 while (done
< budget
) {
893 idx
= NEXT_RX_DESP_IDX(idx
);
894 rxd
= &ring
->rx_dma
[idx
];
895 data
= ring
->rx_data
[idx
];
897 fe_get_rxd(&trxd
, rxd
);
898 if (!(trxd
.rxd2
& RX_DMA_DONE
))
901 /* alloc new buffer */
902 new_data
= page_frag_alloc(&ring
->frag_cache
, ring
->frag_size
,
904 if (unlikely(!new_data
)) {
908 dma_addr
= dma_map_single(&netdev
->dev
,
909 new_data
+ NET_SKB_PAD
+ pad
,
912 if (unlikely(dma_mapping_error(&netdev
->dev
, dma_addr
))) {
913 skb_free_frag(new_data
);
918 skb
= build_skb(data
, ring
->frag_size
);
919 if (unlikely(!skb
)) {
920 skb_free_frag(new_data
);
923 skb_reserve(skb
, NET_SKB_PAD
+ NET_IP_ALIGN
);
925 dma_unmap_single(&netdev
->dev
, trxd
.rxd1
,
926 ring
->rx_buf_size
, DMA_FROM_DEVICE
);
927 pktlen
= RX_DMA_GET_PLEN0(trxd
.rxd2
);
929 skb_put(skb
, pktlen
);
930 if (trxd
.rxd4
& checksum_bit
)
931 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
933 skb_checksum_none_assert(skb
);
934 skb
->protocol
= eth_type_trans(skb
, netdev
);
936 if (netdev
->features
& NETIF_F_HW_VLAN_CTAG_RX
&&
937 RX_DMA_VID(trxd
.rxd3
))
938 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
),
939 RX_DMA_VID(trxd
.rxd3
));
941 #ifdef CONFIG_NET_MEDIATEK_OFFLOAD
942 if (mtk_offload_check_rx(priv
, skb
, trxd
.rxd4
) == 0) {
945 stats
->rx_bytes
+= pktlen
;
947 napi_gro_receive(napi
, skb
);
948 #ifdef CONFIG_NET_MEDIATEK_OFFLOAD
953 ring
->rx_data
[idx
] = new_data
;
954 rxd
->rxd1
= (unsigned int)dma_addr
;
957 if (priv
->flags
& FE_FLAG_RX_SG_DMA
)
958 rxd
->rxd2
= RX_DMA_PLEN0(ring
->rx_buf_size
);
960 rxd
->rxd2
= RX_DMA_LSO
;
962 ring
->rx_calc_idx
= idx
;
963 /* make sure that all changes to the dma ring are flushed before
967 fe_reg_w32(ring
->rx_calc_idx
, FE_REG_RX_CALC_IDX0
);
972 fe_reg_w32(rx_intr
, FE_REG_FE_INT_STATUS
);
977 static int fe_poll_tx(struct fe_priv
*priv
, int budget
, u32 tx_intr
,
980 struct net_device
*netdev
= priv
->netdev
;
981 struct device
*dev
= &netdev
->dev
;
982 unsigned int bytes_compl
= 0;
984 struct fe_tx_buf
*tx_buf
;
987 struct fe_tx_ring
*ring
= &priv
->tx_ring
;
989 idx
= ring
->tx_free_idx
;
990 hwidx
= fe_reg_r32(FE_REG_TX_DTX_IDX0
);
992 while ((idx
!= hwidx
) && budget
) {
993 tx_buf
= &ring
->tx_buf
[idx
];
999 if (skb
!= (struct sk_buff
*)DMA_DUMMY_DESC
) {
1000 bytes_compl
+= skb
->len
;
1004 fe_txd_unmap(dev
, tx_buf
);
1005 idx
= NEXT_TX_DESP_IDX(idx
);
1007 ring
->tx_free_idx
= idx
;
1010 /* read hw index again make sure no new tx packet */
1011 hwidx
= fe_reg_r32(FE_REG_TX_DTX_IDX0
);
1013 fe_reg_w32(tx_intr
, FE_REG_FE_INT_STATUS
);
1021 netdev_completed_queue(netdev
, done
, bytes_compl
);
1023 if (unlikely(netif_queue_stopped(netdev
) &&
1024 (fe_empty_txd(ring
) > ring
->tx_thresh
)))
1025 netif_wake_queue(netdev
);
1031 static int fe_poll(struct napi_struct
*napi
, int budget
)
1033 struct fe_priv
*priv
= container_of(napi
, struct fe_priv
, rx_napi
);
1034 struct fe_hw_stats
*hwstat
= priv
->hw_stats
;
1035 int tx_done
, rx_done
, tx_again
;
1036 u32 status
, fe_status
, status_reg
, mask
;
1037 u32 tx_intr
, rx_intr
, status_intr
;
1039 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
1041 tx_intr
= priv
->soc
->tx_int
;
1042 rx_intr
= priv
->soc
->rx_int
;
1043 status_intr
= priv
->soc
->status_int
;
1048 if (fe_reg_table
[FE_REG_FE_INT_STATUS2
]) {
1049 fe_status
= fe_reg_r32(FE_REG_FE_INT_STATUS2
);
1050 status_reg
= FE_REG_FE_INT_STATUS2
;
1052 status_reg
= FE_REG_FE_INT_STATUS
;
1055 if (status
& tx_intr
)
1056 tx_done
= fe_poll_tx(priv
, budget
, tx_intr
, &tx_again
);
1058 if (status
& rx_intr
)
1059 rx_done
= fe_poll_rx(napi
, budget
, priv
, rx_intr
);
1061 if (unlikely(fe_status
& status_intr
)) {
1062 if (hwstat
&& spin_trylock(&hwstat
->stats_lock
)) {
1063 fe_stats_update(priv
);
1064 spin_unlock(&hwstat
->stats_lock
);
1066 fe_reg_w32(status_intr
, status_reg
);
1069 if (unlikely(netif_msg_intr(priv
))) {
1070 mask
= fe_reg_r32(FE_REG_FE_INT_ENABLE
);
1071 netdev_info(priv
->netdev
,
1072 "done tx %d, rx %d, intr 0x%08x/0x%x\n",
1073 tx_done
, rx_done
, status
, mask
);
1076 if (!tx_again
&& (rx_done
< budget
)) {
1077 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
1078 if (status
& (tx_intr
| rx_intr
)) {
1079 /* let napi poll again */
1084 napi_complete_done(napi
, rx_done
);
1085 fe_int_enable(tx_intr
| rx_intr
);
1094 static void fe_tx_timeout(struct net_device
*dev
)
1096 struct fe_priv
*priv
= netdev_priv(dev
);
1097 struct fe_tx_ring
*ring
= &priv
->tx_ring
;
1099 priv
->netdev
->stats
.tx_errors
++;
1100 netif_err(priv
, tx_err
, dev
,
1101 "transmit timed out\n");
1102 netif_info(priv
, drv
, dev
, "dma_cfg:%08x\n",
1103 fe_reg_r32(FE_REG_PDMA_GLO_CFG
));
1104 netif_info(priv
, drv
, dev
, "tx_ring=%d, "
1105 "base=%08x, max=%u, ctx=%u, dtx=%u, fdx=%hu, next=%hu\n",
1106 0, fe_reg_r32(FE_REG_TX_BASE_PTR0
),
1107 fe_reg_r32(FE_REG_TX_MAX_CNT0
),
1108 fe_reg_r32(FE_REG_TX_CTX_IDX0
),
1109 fe_reg_r32(FE_REG_TX_DTX_IDX0
),
1112 netif_info(priv
, drv
, dev
,
1113 "rx_ring=%d, base=%08x, max=%u, calc=%u, drx=%u\n",
1114 0, fe_reg_r32(FE_REG_RX_BASE_PTR0
),
1115 fe_reg_r32(FE_REG_RX_MAX_CNT0
),
1116 fe_reg_r32(FE_REG_RX_CALC_IDX0
),
1117 fe_reg_r32(FE_REG_RX_DRX_IDX0
));
1119 if (!test_and_set_bit(FE_FLAG_RESET_PENDING
, priv
->pending_flags
))
1120 schedule_work(&priv
->pending_work
);
1123 static irqreturn_t
fe_handle_irq(int irq
, void *dev
)
1125 struct fe_priv
*priv
= netdev_priv(dev
);
1126 u32 status
, int_mask
;
1128 status
= fe_reg_r32(FE_REG_FE_INT_STATUS
);
1130 if (unlikely(!status
))
1133 int_mask
= (priv
->soc
->rx_int
| priv
->soc
->tx_int
);
1134 if (likely(status
& int_mask
)) {
1135 if (likely(napi_schedule_prep(&priv
->rx_napi
))) {
1136 fe_int_disable(int_mask
);
1137 __napi_schedule(&priv
->rx_napi
);
1140 fe_reg_w32(status
, FE_REG_FE_INT_STATUS
);
1146 #ifdef CONFIG_NET_POLL_CONTROLLER
1147 static void fe_poll_controller(struct net_device
*dev
)
1149 struct fe_priv
*priv
= netdev_priv(dev
);
1150 u32 int_mask
= priv
->soc
->tx_int
| priv
->soc
->rx_int
;
1152 fe_int_disable(int_mask
);
1153 fe_handle_irq(dev
->irq
, dev
);
1154 fe_int_enable(int_mask
);
1158 int fe_set_clock_cycle(struct fe_priv
*priv
)
1160 unsigned long sysclk
= priv
->sysclk
;
1162 sysclk
/= FE_US_CYC_CNT_DIVISOR
;
1163 sysclk
<<= FE_US_CYC_CNT_SHIFT
;
1165 fe_w32((fe_r32(FE_FE_GLO_CFG
) &
1166 ~(FE_US_CYC_CNT_MASK
<< FE_US_CYC_CNT_SHIFT
)) |
1172 void fe_fwd_config(struct fe_priv
*priv
)
1176 fwd_cfg
= fe_r32(FE_GDMA1_FWD_CFG
);
1178 /* disable jumbo frame */
1179 if (priv
->flags
& FE_FLAG_JUMBO_FRAME
)
1180 fwd_cfg
&= ~FE_GDM1_JMB_EN
;
1182 /* set unicast/multicast/broadcast frame to cpu */
1185 fe_w32(fwd_cfg
, FE_GDMA1_FWD_CFG
);
1188 static void fe_rxcsum_config(bool enable
)
1191 fe_w32(fe_r32(FE_GDMA1_FWD_CFG
) | (FE_GDM1_ICS_EN
|
1192 FE_GDM1_TCS_EN
| FE_GDM1_UCS_EN
),
1195 fe_w32(fe_r32(FE_GDMA1_FWD_CFG
) & ~(FE_GDM1_ICS_EN
|
1196 FE_GDM1_TCS_EN
| FE_GDM1_UCS_EN
),
1200 static void fe_txcsum_config(bool enable
)
1203 fe_w32(fe_r32(FE_CDMA_CSG_CFG
) | (FE_ICS_GEN_EN
|
1204 FE_TCS_GEN_EN
| FE_UCS_GEN_EN
),
1207 fe_w32(fe_r32(FE_CDMA_CSG_CFG
) & ~(FE_ICS_GEN_EN
|
1208 FE_TCS_GEN_EN
| FE_UCS_GEN_EN
),
1212 void fe_csum_config(struct fe_priv
*priv
)
1214 struct net_device
*dev
= priv_netdev(priv
);
1216 fe_txcsum_config((dev
->features
& NETIF_F_IP_CSUM
));
1217 fe_rxcsum_config((dev
->features
& NETIF_F_RXCSUM
));
1220 static int fe_hw_init(struct net_device
*dev
)
1222 struct fe_priv
*priv
= netdev_priv(dev
);
1225 err
= devm_request_irq(priv
->dev
, dev
->irq
, fe_handle_irq
, 0,
1226 dev_name(priv
->dev
), dev
);
1230 if (priv
->soc
->set_mac
)
1231 priv
->soc
->set_mac(priv
, dev
->dev_addr
);
1233 fe_hw_set_macaddr(priv
, dev
->dev_addr
);
1235 /* disable delay interrupt */
1236 fe_reg_w32(0, FE_REG_DLY_INT_CFG
);
1238 fe_int_disable(priv
->soc
->tx_int
| priv
->soc
->rx_int
);
1240 /* frame engine will push VLAN tag regarding to VIDX feild in Tx desc */
1241 if (fe_reg_table
[FE_REG_FE_DMA_VID_BASE
])
1242 for (i
= 0; i
< 16; i
+= 2)
1243 fe_w32(((i
+ 1) << 16) + i
,
1244 fe_reg_table
[FE_REG_FE_DMA_VID_BASE
] +
1247 if (priv
->soc
->fwd_config(priv
))
1248 netdev_err(dev
, "unable to get clock\n");
1250 if (fe_reg_table
[FE_REG_FE_RST_GL
]) {
1251 fe_reg_w32(1, FE_REG_FE_RST_GL
);
1252 fe_reg_w32(0, FE_REG_FE_RST_GL
);
1258 static int fe_open(struct net_device
*dev
)
1260 struct fe_priv
*priv
= netdev_priv(dev
);
1261 unsigned long flags
;
1265 err
= fe_init_dma(priv
);
1271 spin_lock_irqsave(&priv
->page_lock
, flags
);
1273 val
= FE_TX_WB_DDONE
| FE_RX_DMA_EN
| FE_TX_DMA_EN
;
1274 if (priv
->flags
& FE_FLAG_RX_2B_OFFSET
)
1275 val
|= FE_RX_2B_OFFSET
;
1276 val
|= priv
->soc
->pdma_glo_cfg
;
1277 fe_reg_w32(val
, FE_REG_PDMA_GLO_CFG
);
1279 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
1282 priv
->phy
->start(priv
);
1284 if (priv
->soc
->has_carrier
&& priv
->soc
->has_carrier(priv
))
1285 netif_carrier_on(dev
);
1287 napi_enable(&priv
->rx_napi
);
1288 fe_int_enable(priv
->soc
->tx_int
| priv
->soc
->rx_int
);
1289 netif_start_queue(dev
);
1290 #ifdef CONFIG_NET_MEDIATEK_OFFLOAD
1291 mtk_ppe_probe(priv
);
1297 static int fe_stop(struct net_device
*dev
)
1299 struct fe_priv
*priv
= netdev_priv(dev
);
1300 unsigned long flags
;
1303 netif_tx_disable(dev
);
1304 fe_int_disable(priv
->soc
->tx_int
| priv
->soc
->rx_int
);
1305 napi_disable(&priv
->rx_napi
);
1308 priv
->phy
->stop(priv
);
1310 spin_lock_irqsave(&priv
->page_lock
, flags
);
1312 fe_reg_w32(fe_reg_r32(FE_REG_PDMA_GLO_CFG
) &
1313 ~(FE_TX_WB_DDONE
| FE_RX_DMA_EN
| FE_TX_DMA_EN
),
1314 FE_REG_PDMA_GLO_CFG
);
1315 spin_unlock_irqrestore(&priv
->page_lock
, flags
);
1318 for (i
= 0; i
< 10; i
++) {
1319 if (fe_reg_r32(FE_REG_PDMA_GLO_CFG
) &
1320 (FE_TX_DMA_BUSY
| FE_RX_DMA_BUSY
)) {
1329 #ifdef CONFIG_NET_MEDIATEK_OFFLOAD
1330 mtk_ppe_remove(priv
);
1336 static int __init
fe_init(struct net_device
*dev
)
1338 struct fe_priv
*priv
= netdev_priv(dev
);
1339 struct device_node
*port
;
1340 const char *mac_addr
;
1343 priv
->soc
->reset_fe();
1345 if (priv
->soc
->switch_init
)
1346 if (priv
->soc
->switch_init(priv
)) {
1347 netdev_err(dev
, "failed to initialize switch core\n");
1351 mac_addr
= of_get_mac_address(priv
->dev
->of_node
);
1353 ether_addr_copy(dev
->dev_addr
, mac_addr
);
1355 /* If the mac address is invalid, use random mac address */
1356 if (!is_valid_ether_addr(dev
->dev_addr
)) {
1357 random_ether_addr(dev
->dev_addr
);
1358 dev_err(priv
->dev
, "generated random MAC address %pM\n",
1362 err
= fe_mdio_init(priv
);
1366 if (priv
->soc
->port_init
)
1367 for_each_child_of_node(priv
->dev
->of_node
, port
)
1368 if (of_device_is_compatible(port
, "mediatek,eth-port") &&
1369 of_device_is_available(port
))
1370 priv
->soc
->port_init(priv
, port
);
1373 err
= priv
->phy
->connect(priv
);
1375 goto err_phy_disconnect
;
1378 err
= fe_hw_init(dev
);
1380 goto err_phy_disconnect
;
1382 if ((priv
->flags
& FE_FLAG_HAS_SWITCH
) && priv
->soc
->switch_config
)
1383 priv
->soc
->switch_config(priv
);
1389 priv
->phy
->disconnect(priv
);
1390 fe_mdio_cleanup(priv
);
1395 static void fe_uninit(struct net_device
*dev
)
1397 struct fe_priv
*priv
= netdev_priv(dev
);
1400 priv
->phy
->disconnect(priv
);
1401 fe_mdio_cleanup(priv
);
1403 fe_reg_w32(0, FE_REG_FE_INT_ENABLE
);
1404 free_irq(dev
->irq
, dev
);
1407 static int fe_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1409 struct fe_priv
*priv
= netdev_priv(dev
);
1415 return phy_mii_ioctl(priv
->phy_dev
, ifr
, cmd
);
1418 static int fe_change_mtu(struct net_device
*dev
, int new_mtu
)
1420 struct fe_priv
*priv
= netdev_priv(dev
);
1421 int frag_size
, old_mtu
;
1427 if (!(priv
->flags
& FE_FLAG_JUMBO_FRAME
))
1430 /* return early if the buffer sizes will not change */
1431 if (old_mtu
<= ETH_DATA_LEN
&& new_mtu
<= ETH_DATA_LEN
)
1433 if (old_mtu
> ETH_DATA_LEN
&& new_mtu
> ETH_DATA_LEN
)
1436 if (new_mtu
<= ETH_DATA_LEN
)
1437 priv
->rx_ring
.frag_size
= fe_max_frag_size(ETH_DATA_LEN
);
1439 priv
->rx_ring
.frag_size
= PAGE_SIZE
;
1440 priv
->rx_ring
.rx_buf_size
= fe_max_buf_size(priv
->rx_ring
.frag_size
);
1442 if (!netif_running(dev
))
1446 if (!IS_ENABLED(CONFIG_SOC_MT7621
)) {
1447 fwd_cfg
= fe_r32(FE_GDMA1_FWD_CFG
);
1448 if (new_mtu
<= ETH_DATA_LEN
) {
1449 fwd_cfg
&= ~FE_GDM1_JMB_EN
;
1451 frag_size
= fe_max_frag_size(new_mtu
);
1452 fwd_cfg
&= ~(FE_GDM1_JMB_LEN_MASK
<< FE_GDM1_JMB_LEN_SHIFT
);
1453 fwd_cfg
|= (DIV_ROUND_UP(frag_size
, 1024) <<
1454 FE_GDM1_JMB_LEN_SHIFT
) | FE_GDM1_JMB_EN
;
1456 fe_w32(fwd_cfg
, FE_GDMA1_FWD_CFG
);
1459 return fe_open(dev
);
1462 #ifdef CONFIG_NET_MEDIATEK_OFFLOAD
1464 fe_flow_offload(enum flow_offload_type type
, struct flow_offload
*flow
,
1465 struct flow_offload_hw_path
*src
,
1466 struct flow_offload_hw_path
*dest
)
1468 struct fe_priv
*priv
;
1470 if (src
->dev
!= dest
->dev
)
1473 priv
= netdev_priv(src
->dev
);
1475 return mtk_flow_offload(priv
, type
, flow
, src
, dest
);
1479 static const struct net_device_ops fe_netdev_ops
= {
1480 .ndo_init
= fe_init
,
1481 .ndo_uninit
= fe_uninit
,
1482 .ndo_open
= fe_open
,
1483 .ndo_stop
= fe_stop
,
1484 .ndo_start_xmit
= fe_start_xmit
,
1485 .ndo_set_mac_address
= fe_set_mac_address
,
1486 .ndo_validate_addr
= eth_validate_addr
,
1487 .ndo_do_ioctl
= fe_do_ioctl
,
1488 .ndo_change_mtu
= fe_change_mtu
,
1489 .ndo_tx_timeout
= fe_tx_timeout
,
1490 .ndo_get_stats64
= fe_get_stats64
,
1491 .ndo_vlan_rx_add_vid
= fe_vlan_rx_add_vid
,
1492 .ndo_vlan_rx_kill_vid
= fe_vlan_rx_kill_vid
,
1493 #ifdef CONFIG_NET_POLL_CONTROLLER
1494 .ndo_poll_controller
= fe_poll_controller
,
1496 #ifdef CONFIG_NET_MEDIATEK_OFFLOAD
1497 .ndo_flow_offload
= fe_flow_offload
,
1501 static void fe_reset_pending(struct fe_priv
*priv
)
1503 struct net_device
*dev
= priv
->netdev
;
1511 netif_alert(priv
, ifup
, dev
,
1512 "Driver up/down cycle failed, closing device.\n");
1518 static const struct fe_work_t fe_work
[] = {
1519 {FE_FLAG_RESET_PENDING
, fe_reset_pending
},
1522 static void fe_pending_work(struct work_struct
*work
)
1524 struct fe_priv
*priv
= container_of(work
, struct fe_priv
, pending_work
);
1528 for (i
= 0; i
< ARRAY_SIZE(fe_work
); i
++) {
1529 pending
= test_and_clear_bit(fe_work
[i
].bitnr
,
1530 priv
->pending_flags
);
1532 fe_work
[i
].action(priv
);
1536 static int fe_probe(struct platform_device
*pdev
)
1538 struct resource
*res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1539 const struct of_device_id
*match
;
1540 struct fe_soc_data
*soc
;
1541 struct net_device
*netdev
;
1542 struct fe_priv
*priv
;
1544 int err
, napi_weight
;
1546 device_reset(&pdev
->dev
);
1548 match
= of_match_device(of_fe_match
, &pdev
->dev
);
1549 soc
= (struct fe_soc_data
*)match
->data
;
1552 fe_reg_table
= soc
->reg_table
;
1554 soc
->reg_table
= fe_reg_table
;
1556 fe_base
= devm_ioremap_resource(&pdev
->dev
, res
);
1557 if (IS_ERR(fe_base
)) {
1558 err
= -EADDRNOTAVAIL
;
1562 netdev
= alloc_etherdev(sizeof(*priv
));
1564 dev_err(&pdev
->dev
, "alloc_etherdev failed\n");
1569 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
1570 netdev
->netdev_ops
= &fe_netdev_ops
;
1571 netdev
->base_addr
= (unsigned long)fe_base
;
1573 netdev
->irq
= platform_get_irq(pdev
, 0);
1574 if (netdev
->irq
< 0) {
1575 dev_err(&pdev
->dev
, "no IRQ resource found\n");
1581 soc
->init_data(soc
, netdev
);
1582 netdev
->vlan_features
= netdev
->hw_features
&
1583 ~(NETIF_F_HW_VLAN_CTAG_TX
|
1584 NETIF_F_HW_VLAN_CTAG_RX
);
1585 netdev
->features
|= netdev
->hw_features
;
1587 if (IS_ENABLED(CONFIG_SOC_MT7621
))
1588 netdev
->max_mtu
= 2048;
1590 /* fake rx vlan filter func. to support tx vlan offload func */
1591 if (fe_reg_table
[FE_REG_FE_DMA_VID_BASE
])
1592 netdev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1594 priv
= netdev_priv(netdev
);
1595 spin_lock_init(&priv
->page_lock
);
1596 if (fe_reg_table
[FE_REG_FE_COUNTER_BASE
]) {
1597 priv
->hw_stats
= kzalloc(sizeof(*priv
->hw_stats
), GFP_KERNEL
);
1598 if (!priv
->hw_stats
) {
1602 spin_lock_init(&priv
->hw_stats
->stats_lock
);
1605 sysclk
= devm_clk_get(&pdev
->dev
, NULL
);
1606 if (!IS_ERR(sysclk
)) {
1607 priv
->sysclk
= clk_get_rate(sysclk
);
1608 } else if ((priv
->flags
& FE_FLAG_CALIBRATE_CLK
)) {
1609 dev_err(&pdev
->dev
, "this soc needs a clk for calibration\n");
1614 priv
->switch_np
= of_parse_phandle(pdev
->dev
.of_node
, "mediatek,switch", 0);
1615 if ((priv
->flags
& FE_FLAG_HAS_SWITCH
) && !priv
->switch_np
) {
1616 dev_err(&pdev
->dev
, "failed to read switch phandle\n");
1621 priv
->netdev
= netdev
;
1622 priv
->dev
= &pdev
->dev
;
1624 priv
->msg_enable
= netif_msg_init(fe_msg_level
, FE_DEFAULT_MSG_ENABLE
);
1625 priv
->rx_ring
.frag_size
= fe_max_frag_size(ETH_DATA_LEN
);
1626 priv
->rx_ring
.rx_buf_size
= fe_max_buf_size(priv
->rx_ring
.frag_size
);
1627 priv
->tx_ring
.tx_ring_size
= NUM_DMA_DESC
;
1628 priv
->rx_ring
.rx_ring_size
= NUM_DMA_DESC
;
1629 INIT_WORK(&priv
->pending_work
, fe_pending_work
);
1630 u64_stats_init(&priv
->hw_stats
->syncp
);
1633 if (priv
->flags
& FE_FLAG_NAPI_WEIGHT
) {
1635 priv
->tx_ring
.tx_ring_size
*= 4;
1636 priv
->rx_ring
.rx_ring_size
*= 4;
1638 netif_napi_add(netdev
, &priv
->rx_napi
, fe_poll
, napi_weight
);
1639 fe_set_ethtool_ops(netdev
);
1641 err
= register_netdev(netdev
);
1643 dev_err(&pdev
->dev
, "error bringing up device\n");
1647 platform_set_drvdata(pdev
, netdev
);
1649 netif_info(priv
, probe
, netdev
, "mediatek frame engine at 0x%08lx, irq %d\n",
1650 netdev
->base_addr
, netdev
->irq
);
1655 free_netdev(netdev
);
1657 devm_iounmap(&pdev
->dev
, fe_base
);
1662 static int fe_remove(struct platform_device
*pdev
)
1664 struct net_device
*dev
= platform_get_drvdata(pdev
);
1665 struct fe_priv
*priv
= netdev_priv(dev
);
1667 netif_napi_del(&priv
->rx_napi
);
1668 kfree(priv
->hw_stats
);
1670 cancel_work_sync(&priv
->pending_work
);
1672 unregister_netdev(dev
);
1674 platform_set_drvdata(pdev
, NULL
);
1679 static struct platform_driver fe_driver
= {
1681 .remove
= fe_remove
,
1683 .name
= "mtk_soc_eth",
1684 .owner
= THIS_MODULE
,
1685 .of_match_table
= of_fe_match
,
1689 module_platform_driver(fe_driver
);
1691 MODULE_LICENSE("GPL");
1692 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
1693 MODULE_DESCRIPTION("Ethernet driver for Ralink SoC");
1694 MODULE_VERSION(MTK_FE_DRV_VERSION
);