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27#include <linux/delay.h>
28#include <linux/dma-mapping.h>
29#include <linux/dmapool.h>
30#include <linux/etherdevice.h>
31#include <linux/io.h>
32#include <linux/kernel.h>
33#include <linux/phy.h>
34#include <linux/platform_device.h>
35#include <mach/npe.h>
36#include <mach/qmgr.h>
37
38#define DEBUG_DESC 0
39#define DEBUG_RX 0
40#define DEBUG_TX 0
41#define DEBUG_PKT_BYTES 0
42#define DEBUG_MDIO 0
43#define DEBUG_CLOSE 0
44
45#define DRV_NAME "ixp4xx_eth"
46
47#define MAX_NPES 3
48
49#define RX_DESCS 64
50#define TX_DESCS 16
51#define TXDONE_QUEUE_LEN 64
52
53#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
54#define REGS_SIZE 0x1000
55#define MAX_MRU 1536
56#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
57
58#define NAPI_WEIGHT 16
59#define MDIO_INTERVAL (3 * HZ)
60#define MAX_MDIO_RETRIES 100
61#define MAX_CLOSE_WAIT 1000
62
63#define NPE_ID(port_id) ((port_id) >> 4)
64#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
65#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
66#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
67#define TXDONE_QUEUE 31
68
69
70#define TX_CNTRL0_TX_EN 0x01
71#define TX_CNTRL0_HALFDUPLEX 0x02
72#define TX_CNTRL0_RETRY 0x04
73#define TX_CNTRL0_PAD_EN 0x08
74#define TX_CNTRL0_APPEND_FCS 0x10
75#define TX_CNTRL0_2DEFER 0x20
76#define TX_CNTRL0_RMII 0x40
77#define TX_CNTRL1_RETRIES 0x0F
78
79
80#define RX_CNTRL0_RX_EN 0x01
81#define RX_CNTRL0_PADSTRIP_EN 0x02
82#define RX_CNTRL0_SEND_FCS 0x04
83#define RX_CNTRL0_PAUSE_EN 0x08
84#define RX_CNTRL0_LOOP_EN 0x10
85#define RX_CNTRL0_ADDR_FLTR_EN 0x20
86#define RX_CNTRL0_RX_RUNT_EN 0x40
87#define RX_CNTRL0_BCAST_DIS 0x80
88#define RX_CNTRL1_DEFER_EN 0x01
89
90
91#define CORE_RESET 0x01
92#define CORE_RX_FIFO_FLUSH 0x02
93#define CORE_TX_FIFO_FLUSH 0x04
94#define CORE_SEND_JAM 0x08
95#define CORE_MDC_EN 0x10
96
97#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
98 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
99 TX_CNTRL0_2DEFER)
100#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
101#define DEFAULT_CORE_CNTRL CORE_MDC_EN
102
103
104
105#define NPE_GETSTATUS 0x00
106#define NPE_EDB_SETPORTADDRESS 0x01
107#define NPE_EDB_GETMACADDRESSDATABASE 0x02
108#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
109#define NPE_GETSTATS 0x04
110#define NPE_RESETSTATS 0x05
111#define NPE_SETMAXFRAMELENGTHS 0x06
112#define NPE_VLAN_SETRXTAGMODE 0x07
113#define NPE_VLAN_SETDEFAULTRXVID 0x08
114#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
115#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
116#define NPE_VLAN_SETRXQOSENTRY 0x0B
117#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
118#define NPE_STP_SETBLOCKINGSTATE 0x0D
119#define NPE_FW_SETFIREWALLMODE 0x0E
120#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
121#define NPE_PC_SETAPMACTABLE 0x11
122#define NPE_SETLOOPBACK_MODE 0x12
123#define NPE_PC_SETBSSIDTABLE 0x13
124#define NPE_ADDRESS_FILTER_CONFIG 0x14
125#define NPE_APPENDFCSCONFIG 0x15
126#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
127#define NPE_MAC_RECOVERY_START 0x17
128
129
130#ifdef __ARMEB__
131typedef struct sk_buff buffer_t;
132#define free_buffer dev_kfree_skb
133#define free_buffer_irq dev_kfree_skb_irq
134#else
135typedef void buffer_t;
136#define free_buffer kfree
137#define free_buffer_irq kfree
138#endif
139
140struct eth_regs {
141 u32 tx_control[2], __res1[2];
142 u32 rx_control[2], __res2[2];
143 u32 random_seed, __res3[3];
144 u32 partial_empty_threshold, __res4;
145 u32 partial_full_threshold, __res5;
146 u32 tx_start_bytes, __res6[3];
147 u32 tx_deferral, rx_deferral, __res7[2];
148 u32 tx_2part_deferral[2], __res8[2];
149 u32 slot_time, __res9[3];
150 u32 mdio_command[4];
151 u32 mdio_status[4];
152 u32 mcast_mask[6], __res10[2];
153 u32 mcast_addr[6], __res11[2];
154 u32 int_clock_threshold, __res12[3];
155 u32 hw_addr[6], __res13[61];
156 u32 core_control;
157};
158
159struct port {
160 struct resource *mem_res;
161 struct eth_regs __iomem *regs;
162 struct npe *npe;
163 struct net_device *netdev;
164 struct napi_struct napi;
165 struct phy_device *phydev;
166 struct eth_plat_info *plat;
167 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
168 struct desc *desc_tab;
169 u32 desc_tab_phys;
170 int id;
171 int speed, duplex;
172 u8 firmware[4];
173};
174
175
176struct msg {
177#ifdef __ARMEB__
178 u8 cmd, eth_id, byte2, byte3;
179 u8 byte4, byte5, byte6, byte7;
180#else
181 u8 byte3, byte2, eth_id, cmd;
182 u8 byte7, byte6, byte5, byte4;
183#endif
184};
185
186
187struct desc {
188 u32 next;
189
190#ifdef __ARMEB__
191 u16 buf_len;
192 u16 pkt_len;
193 u32 data;
194 u8 dest_id;
195 u8 src_id;
196 u16 flags;
197 u8 qos;
198 u8 padlen;
199 u16 vlan_tci;
200#else
201 u16 pkt_len;
202 u16 buf_len;
203 u32 data;
204 u16 flags;
205 u8 src_id;
206 u8 dest_id;
207 u16 vlan_tci;
208 u8 padlen;
209 u8 qos;
210#endif
211
212#ifdef __ARMEB__
213 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
214 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
215 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
216#else
217 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
218 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
219 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
220#endif
221};
222
223
224#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
225 (n) * sizeof(struct desc))
226#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
227
228#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
229 ((n) + RX_DESCS) * sizeof(struct desc))
230#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
231
232#ifndef __ARMEB__
233static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
234{
235 int i;
236 for (i = 0; i < cnt; i++)
237 dest[i] = swab32(src[i]);
238}
239#endif
240
241static spinlock_t mdio_lock;
242static struct eth_regs __iomem *mdio_regs;
243struct mii_bus *mdio_bus;
244static int ports_open;
245static struct port *npe_port_tab[MAX_NPES];
246static struct dma_pool *dma_pool;
247
248
249static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
250 int write, u16 cmd)
251{
252 int cycles = 0;
253
254 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
255 printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
256 return -1;
257 }
258
259 if (write) {
260 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
261 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
262 }
263 __raw_writel(((phy_id << 5) | location) & 0xFF,
264 &mdio_regs->mdio_command[2]);
265 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 ,
266 &mdio_regs->mdio_command[3]);
267
268 while ((cycles < MAX_MDIO_RETRIES) &&
269 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
270 udelay(1);
271 cycles++;
272 }
273
274 if (cycles == MAX_MDIO_RETRIES) {
275 printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
276 phy_id);
277 return -1;
278 }
279
280#if DEBUG_MDIO
281 printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
282 phy_id, write ? "write" : "read", cycles);
283#endif
284
285 if (write)
286 return 0;
287
288 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
289#if DEBUG_MDIO
290 printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
291 phy_id);
292#endif
293 return 0xFFFF;
294 }
295
296 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
297 ((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
298}
299
300static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
301{
302 unsigned long flags;
303 int ret;
304
305 spin_lock_irqsave(&mdio_lock, flags);
306 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
307 spin_unlock_irqrestore(&mdio_lock, flags);
308#if DEBUG_MDIO
309 printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
310 phy_id, location, ret);
311#endif
312 return ret;
313}
314
315static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
316 u16 val)
317{
318 unsigned long flags;
319 int ret;
320
321 spin_lock_irqsave(&mdio_lock, flags);
322 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
323 spin_unlock_irqrestore(&mdio_lock, flags);
324#if DEBUG_MDIO
325 printk(KERN_DEBUG "%s #%i: MII read [%i] <- 0x%X, err = %i\n",
326 bus->name, phy_id, location, val, ret);
327#endif
328 return ret;
329}
330
331static int ixp4xx_mdio_register(void)
332{
333 int err;
334
335 if (!(mdio_bus = mdiobus_alloc()))
336 return -ENOMEM;
337
338 if (cpu_is_ixp43x()) {
339
340 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEC_ETH))
341 return -ENODEV;
342 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
343 } else {
344
345 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
346 return -ENODEV;
347 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
348 }
349
350 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
351 spin_lock_init(&mdio_lock);
352 mdio_bus->name = "IXP4xx MII Bus";
353 mdio_bus->read = &ixp4xx_mdio_read;
354 mdio_bus->write = &ixp4xx_mdio_write;
355 strcpy(mdio_bus->id, "0");
356
357 if ((err = mdiobus_register(mdio_bus)))
358 mdiobus_free(mdio_bus);
359 return err;
360}
361
362static void ixp4xx_mdio_remove(void)
363{
364 mdiobus_unregister(mdio_bus);
365 mdiobus_free(mdio_bus);
366}
367
368
369static void ixp4xx_adjust_link(struct net_device *dev)
370{
371 struct port *port = netdev_priv(dev);
372 struct phy_device *phydev = port->phydev;
373
374 if (!phydev->link) {
375 if (port->speed) {
376 port->speed = 0;
377 printk(KERN_INFO "%s: link down\n", dev->name);
378 }
379 return;
380 }
381
382 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
383 return;
384
385 port->speed = phydev->speed;
386 port->duplex = phydev->duplex;
387
388 if (port->duplex)
389 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
390 &port->regs->tx_control[0]);
391 else
392 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
393 &port->regs->tx_control[0]);
394
395 printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
396 dev->name, port->speed, port->duplex ? "full" : "half");
397}
398
399
400static inline void debug_pkt(struct net_device *dev, const char *func,
401 u8 *data, int len)
402{
403#if DEBUG_PKT_BYTES
404 int i;
405
406 printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
407 for (i = 0; i < len; i++) {
408 if (i >= DEBUG_PKT_BYTES)
409 break;
410 printk("%s%02X",
411 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
412 data[i]);
413 }
414 printk("\n");
415#endif
416}
417
418
419static inline void debug_desc(u32 phys, struct desc *desc)
420{
421#if DEBUG_DESC
422 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
423 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
424 phys, desc->next, desc->buf_len, desc->pkt_len,
425 desc->data, desc->dest_id, desc->src_id, desc->flags,
426 desc->qos, desc->padlen, desc->vlan_tci,
427 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
428 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
429 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
430 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
431#endif
432}
433
434static inline int queue_get_desc(unsigned int queue, struct port *port,
435 int is_tx)
436{
437 u32 phys, tab_phys, n_desc;
438 struct desc *tab;
439
440 if (!(phys = qmgr_get_entry(queue)))
441 return -1;
442
443 phys &= ~0x1F;
444 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
445 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
446 n_desc = (phys - tab_phys) / sizeof(struct desc);
447 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
448 debug_desc(phys, &tab[n_desc]);
449 BUG_ON(tab[n_desc].next);
450 return n_desc;
451}
452
453static inline void queue_put_desc(unsigned int queue, u32 phys,
454 struct desc *desc)
455{
456 debug_desc(phys, desc);
457 BUG_ON(phys & 0x1F);
458 qmgr_put_entry(queue, phys);
459
460
461}
462
463
464static inline void dma_unmap_tx(struct port *port, struct desc *desc)
465{
466#ifdef __ARMEB__
467 dma_unmap_single(&port->netdev->dev, desc->data,
468 desc->buf_len, DMA_TO_DEVICE);
469#else
470 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
471 ALIGN((desc->data & 3) + desc->buf_len, 4),
472 DMA_TO_DEVICE);
473#endif
474}
475
476
477static void eth_rx_irq(void *pdev)
478{
479 struct net_device *dev = pdev;
480 struct port *port = netdev_priv(dev);
481
482#if DEBUG_RX
483 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
484#endif
485 qmgr_disable_irq(port->plat->rxq);
486 napi_schedule(&port->napi);
487}
488
489static int eth_poll(struct napi_struct *napi, int budget)
490{
491 struct port *port = container_of(napi, struct port, napi);
492 struct net_device *dev = port->netdev;
493 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
494 int received = 0;
495
496#if DEBUG_RX
497 printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
498#endif
499
500 while (received < budget) {
501 struct sk_buff *skb;
502 struct desc *desc;
503 int n;
504#ifdef __ARMEB__
505 struct sk_buff *temp;
506 u32 phys;
507#endif
508
509 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
510#if DEBUG_RX
511 printk(KERN_DEBUG "%s: eth_poll napi_complete\n",
512 dev->name);
513#endif
514 napi_complete(napi);
515 qmgr_enable_irq(rxq);
516 if (!qmgr_stat_below_low_watermark(rxq) &&
517 napi_reschedule(napi)) {
518#if DEBUG_RX
519 printk(KERN_DEBUG "%s: eth_poll"
520 " napi_reschedule successed\n",
521 dev->name);
522#endif
523 qmgr_disable_irq(rxq);
524 continue;
525 }
526#if DEBUG_RX
527 printk(KERN_DEBUG "%s: eth_poll all done\n",
528 dev->name);
529#endif
530 return received;
531 }
532
533 desc = rx_desc_ptr(port, n);
534
535#ifdef __ARMEB__
536 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
537 phys = dma_map_single(&dev->dev, skb->data,
538 RX_BUFF_SIZE, DMA_FROM_DEVICE);
539 if (dma_mapping_error(&dev->dev, phys)) {
540 dev_kfree_skb(skb);
541 skb = NULL;
542 }
543 }
544#else
545 skb = netdev_alloc_skb(dev,
546 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
547#endif
548
549 if (!skb) {
550 dev->stats.rx_dropped++;
551
552 desc->buf_len = MAX_MRU;
553 desc->pkt_len = 0;
554 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
555 continue;
556 }
557
558
559#ifdef __ARMEB__
560 temp = skb;
561 skb = port->rx_buff_tab[n];
562 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
563 RX_BUFF_SIZE, DMA_FROM_DEVICE);
564#else
565 dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
566 RX_BUFF_SIZE, DMA_FROM_DEVICE);
567 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
568 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
569#endif
570 skb_reserve(skb, NET_IP_ALIGN);
571 skb_put(skb, desc->pkt_len);
572
573 debug_pkt(dev, "eth_poll", skb->data, skb->len);
574
575 skb->protocol = eth_type_trans(skb, dev);
576 dev->stats.rx_packets++;
577 dev->stats.rx_bytes += skb->len;
578 netif_receive_skb(skb);
579
580
581#ifdef __ARMEB__
582 port->rx_buff_tab[n] = temp;
583 desc->data = phys + NET_IP_ALIGN;
584#endif
585 desc->buf_len = MAX_MRU;
586 desc->pkt_len = 0;
587 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
588 received++;
589 }
590
591#if DEBUG_RX
592 printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
593#endif
594 return received;
595}
596
597
598static void eth_txdone_irq(void *unused)
599{
600 u32 phys;
601
602#if DEBUG_TX
603 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
604#endif
605 while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
606 u32 npe_id, n_desc;
607 struct port *port;
608 struct desc *desc;
609 int start;
610
611 npe_id = phys & 3;
612 BUG_ON(npe_id >= MAX_NPES);
613 port = npe_port_tab[npe_id];
614 BUG_ON(!port);
615 phys &= ~0x1F;
616 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
617 BUG_ON(n_desc >= TX_DESCS);
618 desc = tx_desc_ptr(port, n_desc);
619 debug_desc(phys, desc);
620
621 if (port->tx_buff_tab[n_desc]) {
622 port->netdev->stats.tx_packets++;
623 port->netdev->stats.tx_bytes += desc->pkt_len;
624
625 dma_unmap_tx(port, desc);
626#if DEBUG_TX
627 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
628 port->netdev->name, port->tx_buff_tab[n_desc]);
629#endif
630 free_buffer_irq(port->tx_buff_tab[n_desc]);
631 port->tx_buff_tab[n_desc] = NULL;
632 }
633
634 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
635 queue_put_desc(port->plat->txreadyq, phys, desc);
636 if (start) {
637#if DEBUG_TX
638 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
639 port->netdev->name);
640#endif
641 netif_wake_queue(port->netdev);
642 }
643 }
644}
645
646static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
647{
648 struct port *port = netdev_priv(dev);
649 unsigned int txreadyq = port->plat->txreadyq;
650 int len, offset, bytes, n;
651 void *mem;
652 u32 phys;
653 struct desc *desc;
654
655#if DEBUG_TX
656 printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
657#endif
658
659 if (unlikely(skb->len > MAX_MRU)) {
660 dev_kfree_skb(skb);
661 dev->stats.tx_errors++;
662 return NETDEV_TX_OK;
663 }
664
665 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
666
667 len = skb->len;
668#ifdef __ARMEB__
669 offset = 0;
670 bytes = len;
671 mem = skb->data;
672#else
673 offset = (int)skb->data & 3;
674 bytes = ALIGN(offset + len, 4);
675 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
676 dev_kfree_skb(skb);
677 dev->stats.tx_dropped++;
678 return NETDEV_TX_OK;
679 }
680 memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
681 dev_kfree_skb(skb);
682#endif
683
684 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
685 if (dma_mapping_error(&dev->dev, phys)) {
686#ifdef __ARMEB__
687 dev_kfree_skb(skb);
688#else
689 kfree(mem);
690#endif
691 dev->stats.tx_dropped++;
692 return NETDEV_TX_OK;
693 }
694
695 n = queue_get_desc(txreadyq, port, 1);
696 BUG_ON(n < 0);
697 desc = tx_desc_ptr(port, n);
698
699#ifdef __ARMEB__
700 port->tx_buff_tab[n] = skb;
701#else
702 port->tx_buff_tab[n] = mem;
703#endif
704 desc->data = phys + offset;
705 desc->buf_len = desc->pkt_len = len;
706
707
708 wmb();
709 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
710 dev->trans_start = jiffies;
711
712 if (qmgr_stat_below_low_watermark(txreadyq)) {
713#if DEBUG_TX
714 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
715#endif
716 netif_stop_queue(dev);
717
718
719 if (!qmgr_stat_below_low_watermark(txreadyq)) {
720#if DEBUG_TX
721 printk(KERN_DEBUG "%s: eth_xmit ready again\n",
722 dev->name);
723#endif
724 netif_wake_queue(dev);
725 }
726 }
727
728#if DEBUG_TX
729 printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
730#endif
731 return NETDEV_TX_OK;
732}
733
734
735static void eth_set_mcast_list(struct net_device *dev)
736{
737 struct port *port = netdev_priv(dev);
738 struct dev_mc_list *mclist = dev->mc_list;
739 u8 diffs[ETH_ALEN], *addr;
740 int cnt = dev->mc_count, i;
741
742 if ((dev->flags & IFF_PROMISC) || !mclist || !cnt) {
743 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
744 &port->regs->rx_control[0]);
745 return;
746 }
747
748 memset(diffs, 0, ETH_ALEN);
749 addr = mclist->dmi_addr;
750
751 while (--cnt && (mclist = mclist->next))
752 for (i = 0; i < ETH_ALEN; i++)
753 diffs[i] |= addr[i] ^ mclist->dmi_addr[i];
754
755 for (i = 0; i < ETH_ALEN; i++) {
756 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
757 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
758 }
759
760 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
761 &port->regs->rx_control[0]);
762}
763
764
765static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
766{
767 struct port *port = netdev_priv(dev);
768
769 if (!netif_running(dev))
770 return -EINVAL;
771 return phy_mii_ioctl(port->phydev, if_mii(req), cmd);
772}
773
774
775
776static void ixp4xx_get_drvinfo(struct net_device *dev,
777 struct ethtool_drvinfo *info)
778{
779 struct port *port = netdev_priv(dev);
780 strcpy(info->driver, DRV_NAME);
781 snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
782 port->firmware[0], port->firmware[1],
783 port->firmware[2], port->firmware[3]);
784 strcpy(info->bus_info, "internal");
785}
786
787static int ixp4xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
788{
789 struct port *port = netdev_priv(dev);
790 return phy_ethtool_gset(port->phydev, cmd);
791}
792
793static int ixp4xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
794{
795 struct port *port = netdev_priv(dev);
796 return phy_ethtool_sset(port->phydev, cmd);
797}
798
799static int ixp4xx_nway_reset(struct net_device *dev)
800{
801 struct port *port = netdev_priv(dev);
802 return phy_start_aneg(port->phydev);
803}
804
805static const struct ethtool_ops ixp4xx_ethtool_ops = {
806 .get_drvinfo = ixp4xx_get_drvinfo,
807 .get_settings = ixp4xx_get_settings,
808 .set_settings = ixp4xx_set_settings,
809 .nway_reset = ixp4xx_nway_reset,
810 .get_link = ethtool_op_get_link,
811};
812
813
814static int request_queues(struct port *port)
815{
816 int err;
817
818 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
819 "%s:RX-free", port->netdev->name);
820 if (err)
821 return err;
822
823 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
824 "%s:RX", port->netdev->name);
825 if (err)
826 goto rel_rxfree;
827
828 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
829 "%s:TX", port->netdev->name);
830 if (err)
831 goto rel_rx;
832
833 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
834 "%s:TX-ready", port->netdev->name);
835 if (err)
836 goto rel_tx;
837
838
839 if (!ports_open) {
840 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
841 "%s:TX-done", DRV_NAME);
842 if (err)
843 goto rel_txready;
844 }
845 return 0;
846
847rel_txready:
848 qmgr_release_queue(port->plat->txreadyq);
849rel_tx:
850 qmgr_release_queue(TX_QUEUE(port->id));
851rel_rx:
852 qmgr_release_queue(port->plat->rxq);
853rel_rxfree:
854 qmgr_release_queue(RXFREE_QUEUE(port->id));
855 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
856 port->netdev->name);
857 return err;
858}
859
860static void release_queues(struct port *port)
861{
862 qmgr_release_queue(RXFREE_QUEUE(port->id));
863 qmgr_release_queue(port->plat->rxq);
864 qmgr_release_queue(TX_QUEUE(port->id));
865 qmgr_release_queue(port->plat->txreadyq);
866
867 if (!ports_open)
868 qmgr_release_queue(TXDONE_QUEUE);
869}
870
871static int init_queues(struct port *port)
872{
873 int i;
874
875 if (!ports_open)
876 if (!(dma_pool = dma_pool_create(DRV_NAME, NULL,
877 POOL_ALLOC_SIZE, 32, 0)))
878 return -ENOMEM;
879
880 if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
881 &port->desc_tab_phys)))
882 return -ENOMEM;
883 memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
884 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab));
885 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
886
887
888 for (i = 0; i < RX_DESCS; i++) {
889 struct desc *desc = rx_desc_ptr(port, i);
890 buffer_t *buff;
891 void *data;
892#ifdef __ARMEB__
893 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
894 return -ENOMEM;
895 data = buff->data;
896#else
897 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
898 return -ENOMEM;
899 data = buff;
900#endif
901 desc->buf_len = MAX_MRU;
902 desc->data = dma_map_single(&port->netdev->dev, data,
903 RX_BUFF_SIZE, DMA_FROM_DEVICE);
904 if (dma_mapping_error(&port->netdev->dev, desc->data)) {
905 free_buffer(buff);
906 return -EIO;
907 }
908 desc->data += NET_IP_ALIGN;
909 port->rx_buff_tab[i] = buff;
910 }
911
912 return 0;
913}
914
915static void destroy_queues(struct port *port)
916{
917 int i;
918
919 if (port->desc_tab) {
920 for (i = 0; i < RX_DESCS; i++) {
921 struct desc *desc = rx_desc_ptr(port, i);
922 buffer_t *buff = port->rx_buff_tab[i];
923 if (buff) {
924 dma_unmap_single(&port->netdev->dev,
925 desc->data - NET_IP_ALIGN,
926 RX_BUFF_SIZE, DMA_FROM_DEVICE);
927 free_buffer(buff);
928 }
929 }
930 for (i = 0; i < TX_DESCS; i++) {
931 struct desc *desc = tx_desc_ptr(port, i);
932 buffer_t *buff = port->tx_buff_tab[i];
933 if (buff) {
934 dma_unmap_tx(port, desc);
935 free_buffer(buff);
936 }
937 }
938 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
939 port->desc_tab = NULL;
940 }
941
942 if (!ports_open && dma_pool) {
943 dma_pool_destroy(dma_pool);
944 dma_pool = NULL;
945 }
946}
947
948static int eth_open(struct net_device *dev)
949{
950 struct port *port = netdev_priv(dev);
951 struct npe *npe = port->npe;
952 struct msg msg;
953 int i, err;
954
955 if (!npe_running(npe)) {
956 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
957 if (err)
958 return err;
959
960 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
961 printk(KERN_ERR "%s: %s not responding\n", dev->name,
962 npe_name(npe));
963 return -EIO;
964 }
965 port->firmware[0] = msg.byte4;
966 port->firmware[1] = msg.byte5;
967 port->firmware[2] = msg.byte6;
968 port->firmware[3] = msg.byte7;
969 }
970
971 memset(&msg, 0, sizeof(msg));
972 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
973 msg.eth_id = port->id;
974 msg.byte5 = port->plat->rxq | 0x80;
975 msg.byte7 = port->plat->rxq << 4;
976 for (i = 0; i < 8; i++) {
977 msg.byte3 = i;
978 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
979 return -EIO;
980 }
981
982 msg.cmd = NPE_EDB_SETPORTADDRESS;
983 msg.eth_id = PHYSICAL_ID(port->id);
984 msg.byte2 = dev->dev_addr[0];
985 msg.byte3 = dev->dev_addr[1];
986 msg.byte4 = dev->dev_addr[2];
987 msg.byte5 = dev->dev_addr[3];
988 msg.byte6 = dev->dev_addr[4];
989 msg.byte7 = dev->dev_addr[5];
990 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
991 return -EIO;
992
993 memset(&msg, 0, sizeof(msg));
994 msg.cmd = NPE_FW_SETFIREWALLMODE;
995 msg.eth_id = port->id;
996 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
997 return -EIO;
998
999 if ((err = request_queues(port)) != 0)
1000 return err;
1001
1002 if ((err = init_queues(port)) != 0) {
1003 destroy_queues(port);
1004 release_queues(port);
1005 return err;
1006 }
1007
1008 port->speed = 0;
1009 phy_start(port->phydev);
1010
1011 for (i = 0; i < ETH_ALEN; i++)
1012 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
1013 __raw_writel(0x08, &port->regs->random_seed);
1014 __raw_writel(0x12, &port->regs->partial_empty_threshold);
1015 __raw_writel(0x30, &port->regs->partial_full_threshold);
1016 __raw_writel(0x08, &port->regs->tx_start_bytes);
1017 __raw_writel(0x15, &port->regs->tx_deferral);
1018 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
1019 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
1020 __raw_writel(0x80, &port->regs->slot_time);
1021 __raw_writel(0x01, &port->regs->int_clock_threshold);
1022
1023
1024 for (i = 0; i < TX_DESCS; i++)
1025 queue_put_desc(port->plat->txreadyq,
1026 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1027
1028 for (i = 0; i < RX_DESCS; i++)
1029 queue_put_desc(RXFREE_QUEUE(port->id),
1030 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1031
1032 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1033 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1034 __raw_writel(0, &port->regs->rx_control[1]);
1035 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1036
1037 napi_enable(&port->napi);
1038 eth_set_mcast_list(dev);
1039 netif_start_queue(dev);
1040
1041 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1042 eth_rx_irq, dev);
1043 if (!ports_open) {
1044 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1045 eth_txdone_irq, NULL);
1046 qmgr_enable_irq(TXDONE_QUEUE);
1047 }
1048 ports_open++;
1049
1050 napi_schedule(&port->napi);
1051 return 0;
1052}
1053
1054static int eth_close(struct net_device *dev)
1055{
1056 struct port *port = netdev_priv(dev);
1057 struct msg msg;
1058 int buffs = RX_DESCS;
1059 int i;
1060
1061 ports_open--;
1062 qmgr_disable_irq(port->plat->rxq);
1063 napi_disable(&port->napi);
1064 netif_stop_queue(dev);
1065
1066 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1067 buffs--;
1068
1069 memset(&msg, 0, sizeof(msg));
1070 msg.cmd = NPE_SETLOOPBACK_MODE;
1071 msg.eth_id = port->id;
1072 msg.byte3 = 1;
1073 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1074 printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
1075
1076 i = 0;
1077 do {
1078 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1079 buffs--;
1080 if (!buffs)
1081 break;
1082 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1083
1084 struct desc *desc;
1085 u32 phys;
1086 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1087 BUG_ON(n < 0);
1088 desc = tx_desc_ptr(port, n);
1089 phys = tx_desc_phys(port, n);
1090 desc->buf_len = desc->pkt_len = 1;
1091 wmb();
1092 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1093 }
1094 udelay(1);
1095 } while (++i < MAX_CLOSE_WAIT);
1096
1097 if (buffs)
1098 printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
1099 " left in NPE\n", dev->name, buffs);
1100#if DEBUG_CLOSE
1101 if (!buffs)
1102 printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
1103#endif
1104
1105 buffs = TX_DESCS;
1106 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1107 buffs--;
1108
1109 i = 0;
1110 do {
1111 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1112 buffs--;
1113 if (!buffs)
1114 break;
1115 } while (++i < MAX_CLOSE_WAIT);
1116
1117 if (buffs)
1118 printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
1119 "left in NPE\n", dev->name, buffs);
1120#if DEBUG_CLOSE
1121 if (!buffs)
1122 printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
1123#endif
1124
1125 msg.byte3 = 0;
1126 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1127 printk(KERN_CRIT "%s: unable to disable loopback\n",
1128 dev->name);
1129
1130 phy_stop(port->phydev);
1131
1132 if (!ports_open)
1133 qmgr_disable_irq(TXDONE_QUEUE);
1134 destroy_queues(port);
1135 release_queues(port);
1136 return 0;
1137}
1138
1139static const struct net_device_ops ixp4xx_netdev_ops = {
1140 .ndo_open = eth_open,
1141 .ndo_stop = eth_close,
1142 .ndo_start_xmit = eth_xmit,
1143 .ndo_set_multicast_list = eth_set_mcast_list,
1144 .ndo_do_ioctl = eth_ioctl,
1145 .ndo_change_mtu = eth_change_mtu,
1146 .ndo_set_mac_address = eth_mac_addr,
1147 .ndo_validate_addr = eth_validate_addr,
1148};
1149
1150static int __devinit eth_init_one(struct platform_device *pdev)
1151{
1152 struct port *port;
1153 struct net_device *dev;
1154 struct eth_plat_info *plat = pdev->dev.platform_data;
1155 u32 regs_phys;
1156 char phy_id[MII_BUS_ID_SIZE + 3];
1157 int err;
1158
1159 if (!(dev = alloc_etherdev(sizeof(struct port))))
1160 return -ENOMEM;
1161
1162 SET_NETDEV_DEV(dev, &pdev->dev);
1163 port = netdev_priv(dev);
1164 port->netdev = dev;
1165 port->id = pdev->id;
1166
1167 switch (port->id) {
1168 case IXP4XX_ETH_NPEA:
1169 port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
1170 regs_phys = IXP4XX_EthA_BASE_PHYS;
1171 break;
1172 case IXP4XX_ETH_NPEB:
1173 port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
1174 regs_phys = IXP4XX_EthB_BASE_PHYS;
1175 break;
1176 case IXP4XX_ETH_NPEC:
1177 port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
1178 regs_phys = IXP4XX_EthC_BASE_PHYS;
1179 break;
1180 default:
1181 err = -ENODEV;
1182 goto err_free;
1183 }
1184
1185 dev->netdev_ops = &ixp4xx_netdev_ops;
1186 dev->ethtool_ops = &ixp4xx_ethtool_ops;
1187 dev->tx_queue_len = 100;
1188
1189 netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
1190
1191 if (!(port->npe = npe_request(NPE_ID(port->id)))) {
1192 err = -EIO;
1193 goto err_free;
1194 }
1195
1196 port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
1197 if (!port->mem_res) {
1198 err = -EBUSY;
1199 goto err_npe_rel;
1200 }
1201
1202 port->plat = plat;
1203 npe_port_tab[NPE_ID(port->id)] = port;
1204 memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
1205
1206 platform_set_drvdata(pdev, dev);
1207
1208 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1209 &port->regs->core_control);
1210 udelay(50);
1211 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1212 udelay(50);
1213
1214 snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, "0", plat->phy);
1215 port->phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link, 0,
1216 PHY_INTERFACE_MODE_MII);
1217 if ((err = IS_ERR(port->phydev)))
1218 goto err_free_mem;
1219
1220 port->phydev->irq = PHY_POLL;
1221
1222 if ((err = register_netdev(dev)))
1223 goto err_phy_dis;
1224
1225 printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
1226 npe_name(port->npe));
1227
1228 return 0;
1229
1230err_phy_dis:
1231 phy_disconnect(port->phydev);
1232err_free_mem:
1233 npe_port_tab[NPE_ID(port->id)] = NULL;
1234 platform_set_drvdata(pdev, NULL);
1235 release_resource(port->mem_res);
1236err_npe_rel:
1237 npe_release(port->npe);
1238err_free:
1239 free_netdev(dev);
1240 return err;
1241}
1242
1243static int __devexit eth_remove_one(struct platform_device *pdev)
1244{
1245 struct net_device *dev = platform_get_drvdata(pdev);
1246 struct port *port = netdev_priv(dev);
1247
1248 unregister_netdev(dev);
1249 phy_disconnect(port->phydev);
1250 npe_port_tab[NPE_ID(port->id)] = NULL;
1251 platform_set_drvdata(pdev, NULL);
1252 npe_release(port->npe);
1253 release_resource(port->mem_res);
1254 free_netdev(dev);
1255 return 0;
1256}
1257
1258static struct platform_driver ixp4xx_eth_driver = {
1259 .driver.name = DRV_NAME,
1260 .probe = eth_init_one,
1261 .remove = eth_remove_one,
1262};
1263
1264static int __init eth_init_module(void)
1265{
1266 int err;
1267 if ((err = ixp4xx_mdio_register()))
1268 return err;
1269 return platform_driver_register(&ixp4xx_eth_driver);
1270}
1271
1272static void __exit eth_cleanup_module(void)
1273{
1274 platform_driver_unregister(&ixp4xx_eth_driver);
1275 ixp4xx_mdio_remove();
1276}
1277
1278MODULE_AUTHOR("Krzysztof Halasa");
1279MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1280MODULE_LICENSE("GPL v2");
1281MODULE_ALIAS("platform:ixp4xx_eth");
1282module_init(eth_init_module);
1283module_exit(eth_cleanup_module);
1284
