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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 <linux/slab.h>
36#include <mach/npe.h>
37#include <mach/qmgr.h>
38
39#define DEBUG_DESC 0
40#define DEBUG_RX 0
41#define DEBUG_TX 0
42#define DEBUG_PKT_BYTES 0
43#define DEBUG_MDIO 0
44#define DEBUG_CLOSE 0
45
46#define DRV_NAME "ixp4xx_eth"
47
48#define MAX_NPES 3
49
50#define RX_DESCS 64
51#define TX_DESCS 16
52#define TXDONE_QUEUE_LEN 64
53
54#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
55#define REGS_SIZE 0x1000
56#define MAX_MRU 1536
57#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
58
59#define NAPI_WEIGHT 16
60#define MDIO_INTERVAL (3 * HZ)
61#define MAX_MDIO_RETRIES 100
62#define MAX_CLOSE_WAIT 1000
63
64#define NPE_ID(port_id) ((port_id) >> 4)
65#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
66#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
67#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
68#define TXDONE_QUEUE 31
69
70
71#define TX_CNTRL0_TX_EN 0x01
72#define TX_CNTRL0_HALFDUPLEX 0x02
73#define TX_CNTRL0_RETRY 0x04
74#define TX_CNTRL0_PAD_EN 0x08
75#define TX_CNTRL0_APPEND_FCS 0x10
76#define TX_CNTRL0_2DEFER 0x20
77#define TX_CNTRL0_RMII 0x40
78#define TX_CNTRL1_RETRIES 0x0F
79
80
81#define RX_CNTRL0_RX_EN 0x01
82#define RX_CNTRL0_PADSTRIP_EN 0x02
83#define RX_CNTRL0_SEND_FCS 0x04
84#define RX_CNTRL0_PAUSE_EN 0x08
85#define RX_CNTRL0_LOOP_EN 0x10
86#define RX_CNTRL0_ADDR_FLTR_EN 0x20
87#define RX_CNTRL0_RX_RUNT_EN 0x40
88#define RX_CNTRL0_BCAST_DIS 0x80
89#define RX_CNTRL1_DEFER_EN 0x01
90
91
92#define CORE_RESET 0x01
93#define CORE_RX_FIFO_FLUSH 0x02
94#define CORE_TX_FIFO_FLUSH 0x04
95#define CORE_SEND_JAM 0x08
96#define CORE_MDC_EN 0x10
97
98#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
99 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
100 TX_CNTRL0_2DEFER)
101#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
102#define DEFAULT_CORE_CNTRL CORE_MDC_EN
103
104
105
106#define NPE_GETSTATUS 0x00
107#define NPE_EDB_SETPORTADDRESS 0x01
108#define NPE_EDB_GETMACADDRESSDATABASE 0x02
109#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
110#define NPE_GETSTATS 0x04
111#define NPE_RESETSTATS 0x05
112#define NPE_SETMAXFRAMELENGTHS 0x06
113#define NPE_VLAN_SETRXTAGMODE 0x07
114#define NPE_VLAN_SETDEFAULTRXVID 0x08
115#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
116#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
117#define NPE_VLAN_SETRXQOSENTRY 0x0B
118#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
119#define NPE_STP_SETBLOCKINGSTATE 0x0D
120#define NPE_FW_SETFIREWALLMODE 0x0E
121#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
122#define NPE_PC_SETAPMACTABLE 0x11
123#define NPE_SETLOOPBACK_MODE 0x12
124#define NPE_PC_SETBSSIDTABLE 0x13
125#define NPE_ADDRESS_FILTER_CONFIG 0x14
126#define NPE_APPENDFCSCONFIG 0x15
127#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
128#define NPE_MAC_RECOVERY_START 0x17
129
130
131#ifdef __ARMEB__
132typedef struct sk_buff buffer_t;
133#define free_buffer dev_kfree_skb
134#define free_buffer_irq dev_kfree_skb_irq
135#else
136typedef void buffer_t;
137#define free_buffer kfree
138#define free_buffer_irq kfree
139#endif
140
141struct eth_regs {
142 u32 tx_control[2], __res1[2];
143 u32 rx_control[2], __res2[2];
144 u32 random_seed, __res3[3];
145 u32 partial_empty_threshold, __res4;
146 u32 partial_full_threshold, __res5;
147 u32 tx_start_bytes, __res6[3];
148 u32 tx_deferral, rx_deferral, __res7[2];
149 u32 tx_2part_deferral[2], __res8[2];
150 u32 slot_time, __res9[3];
151 u32 mdio_command[4];
152 u32 mdio_status[4];
153 u32 mcast_mask[6], __res10[2];
154 u32 mcast_addr[6], __res11[2];
155 u32 int_clock_threshold, __res12[3];
156 u32 hw_addr[6], __res13[61];
157 u32 core_control;
158};
159
160struct port {
161 struct resource *mem_res;
162 struct eth_regs __iomem *regs;
163 struct npe *npe;
164 struct net_device *netdev;
165 struct napi_struct napi;
166 struct phy_device *phydev;
167 struct eth_plat_info *plat;
168 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
169 struct desc *desc_tab;
170 u32 desc_tab_phys;
171 int id;
172 int speed, duplex;
173 u8 firmware[4];
174};
175
176
177struct msg {
178#ifdef __ARMEB__
179 u8 cmd, eth_id, byte2, byte3;
180 u8 byte4, byte5, byte6, byte7;
181#else
182 u8 byte3, byte2, eth_id, cmd;
183 u8 byte7, byte6, byte5, byte4;
184#endif
185};
186
187
188struct desc {
189 u32 next;
190
191#ifdef __ARMEB__
192 u16 buf_len;
193 u16 pkt_len;
194 u32 data;
195 u8 dest_id;
196 u8 src_id;
197 u16 flags;
198 u8 qos;
199 u8 padlen;
200 u16 vlan_tci;
201#else
202 u16 pkt_len;
203 u16 buf_len;
204 u32 data;
205 u16 flags;
206 u8 src_id;
207 u8 dest_id;
208 u16 vlan_tci;
209 u8 padlen;
210 u8 qos;
211#endif
212
213#ifdef __ARMEB__
214 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
215 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
216 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
217#else
218 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
219 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
220 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
221#endif
222};
223
224
225#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
226 (n) * sizeof(struct desc))
227#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
228
229#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
230 ((n) + RX_DESCS) * sizeof(struct desc))
231#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
232
233#ifndef __ARMEB__
234static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
235{
236 int i;
237 for (i = 0; i < cnt; i++)
238 dest[i] = swab32(src[i]);
239}
240#endif
241
242static spinlock_t mdio_lock;
243static struct eth_regs __iomem *mdio_regs;
244struct mii_bus *mdio_bus;
245static int ports_open;
246static struct port *npe_port_tab[MAX_NPES];
247static struct dma_pool *dma_pool;
248
249
250static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
251 int write, u16 cmd)
252{
253 int cycles = 0;
254
255 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
256 printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
257 return -1;
258 }
259
260 if (write) {
261 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
262 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
263 }
264 __raw_writel(((phy_id << 5) | location) & 0xFF,
265 &mdio_regs->mdio_command[2]);
266 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 ,
267 &mdio_regs->mdio_command[3]);
268
269 while ((cycles < MAX_MDIO_RETRIES) &&
270 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
271 udelay(1);
272 cycles++;
273 }
274
275 if (cycles == MAX_MDIO_RETRIES) {
276 printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
277 phy_id);
278 return -1;
279 }
280
281#if DEBUG_MDIO
282 printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
283 phy_id, write ? "write" : "read", cycles);
284#endif
285
286 if (write)
287 return 0;
288
289 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
290#if DEBUG_MDIO
291 printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
292 phy_id);
293#endif
294 return 0xFFFF;
295 }
296
297 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
298 ((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
299}
300
301static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
302{
303 unsigned long flags;
304 int ret;
305
306 spin_lock_irqsave(&mdio_lock, flags);
307 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
308 spin_unlock_irqrestore(&mdio_lock, flags);
309#if DEBUG_MDIO
310 printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
311 phy_id, location, ret);
312#endif
313 return ret;
314}
315
316static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
317 u16 val)
318{
319 unsigned long flags;
320 int ret;
321
322 spin_lock_irqsave(&mdio_lock, flags);
323 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
324 spin_unlock_irqrestore(&mdio_lock, flags);
325#if DEBUG_MDIO
326 printk(KERN_DEBUG "%s #%i: MII write [%i] <- 0x%X, err = %i\n",
327 bus->name, phy_id, location, val, ret);
328#endif
329 return ret;
330}
331
332static int ixp4xx_mdio_register(void)
333{
334 int err;
335
336 if (!(mdio_bus = mdiobus_alloc()))
337 return -ENOMEM;
338
339 if (cpu_is_ixp43x()) {
340
341 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEC_ETH))
342 return -ENODEV;
343 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
344 } else {
345
346 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
347 return -ENODEV;
348 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
349 }
350
351 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
352 spin_lock_init(&mdio_lock);
353 mdio_bus->name = "IXP4xx MII Bus";
354 mdio_bus->read = &ixp4xx_mdio_read;
355 mdio_bus->write = &ixp4xx_mdio_write;
356 strcpy(mdio_bus->id, "0");
357
358 if ((err = mdiobus_register(mdio_bus)))
359 mdiobus_free(mdio_bus);
360 return err;
361}
362
363static void ixp4xx_mdio_remove(void)
364{
365 mdiobus_unregister(mdio_bus);
366 mdiobus_free(mdio_bus);
367}
368
369
370static void ixp4xx_adjust_link(struct net_device *dev)
371{
372 struct port *port = netdev_priv(dev);
373 struct phy_device *phydev = port->phydev;
374
375 if (!phydev->link) {
376 if (port->speed) {
377 port->speed = 0;
378 printk(KERN_INFO "%s: link down\n", dev->name);
379 }
380 return;
381 }
382
383 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
384 return;
385
386 port->speed = phydev->speed;
387 port->duplex = phydev->duplex;
388
389 if (port->duplex)
390 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
391 &port->regs->tx_control[0]);
392 else
393 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
394 &port->regs->tx_control[0]);
395
396 printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
397 dev->name, port->speed, port->duplex ? "full" : "half");
398}
399
400
401static inline void debug_pkt(struct net_device *dev, const char *func,
402 u8 *data, int len)
403{
404#if DEBUG_PKT_BYTES
405 int i;
406
407 printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
408 for (i = 0; i < len; i++) {
409 if (i >= DEBUG_PKT_BYTES)
410 break;
411 printk("%s%02X",
412 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
413 data[i]);
414 }
415 printk("\n");
416#endif
417}
418
419
420static inline void debug_desc(u32 phys, struct desc *desc)
421{
422#if DEBUG_DESC
423 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
424 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
425 phys, desc->next, desc->buf_len, desc->pkt_len,
426 desc->data, desc->dest_id, desc->src_id, desc->flags,
427 desc->qos, desc->padlen, desc->vlan_tci,
428 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
429 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
430 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
431 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
432#endif
433}
434
435static inline int queue_get_desc(unsigned int queue, struct port *port,
436 int is_tx)
437{
438 u32 phys, tab_phys, n_desc;
439 struct desc *tab;
440
441 if (!(phys = qmgr_get_entry(queue)))
442 return -1;
443
444 phys &= ~0x1F;
445 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
446 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
447 n_desc = (phys - tab_phys) / sizeof(struct desc);
448 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
449 debug_desc(phys, &tab[n_desc]);
450 BUG_ON(tab[n_desc].next);
451 return n_desc;
452}
453
454static inline void queue_put_desc(unsigned int queue, u32 phys,
455 struct desc *desc)
456{
457 debug_desc(phys, desc);
458 BUG_ON(phys & 0x1F);
459 qmgr_put_entry(queue, phys);
460
461
462}
463
464
465static inline void dma_unmap_tx(struct port *port, struct desc *desc)
466{
467#ifdef __ARMEB__
468 dma_unmap_single(&port->netdev->dev, desc->data,
469 desc->buf_len, DMA_TO_DEVICE);
470#else
471 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
472 ALIGN((desc->data & 3) + desc->buf_len, 4),
473 DMA_TO_DEVICE);
474#endif
475}
476
477
478static void eth_rx_irq(void *pdev)
479{
480 struct net_device *dev = pdev;
481 struct port *port = netdev_priv(dev);
482
483#if DEBUG_RX
484 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
485#endif
486 qmgr_disable_irq(port->plat->rxq);
487 napi_schedule(&port->napi);
488}
489
490static int eth_poll(struct napi_struct *napi, int budget)
491{
492 struct port *port = container_of(napi, struct port, napi);
493 struct net_device *dev = port->netdev;
494 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
495 int received = 0;
496
497#if DEBUG_RX
498 printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
499#endif
500
501 while (received < budget) {
502 struct sk_buff *skb;
503 struct desc *desc;
504 int n;
505#ifdef __ARMEB__
506 struct sk_buff *temp;
507 u32 phys;
508#endif
509
510 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
511#if DEBUG_RX
512 printk(KERN_DEBUG "%s: eth_poll napi_complete\n",
513 dev->name);
514#endif
515 napi_complete(napi);
516 qmgr_enable_irq(rxq);
517 if (!qmgr_stat_below_low_watermark(rxq) &&
518 napi_reschedule(napi)) {
519#if DEBUG_RX
520 printk(KERN_DEBUG "%s: eth_poll"
521 " napi_reschedule successed\n",
522 dev->name);
523#endif
524 qmgr_disable_irq(rxq);
525 continue;
526 }
527#if DEBUG_RX
528 printk(KERN_DEBUG "%s: eth_poll all done\n",
529 dev->name);
530#endif
531 return received;
532 }
533
534 desc = rx_desc_ptr(port, n);
535
536#ifdef __ARMEB__
537 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
538 phys = dma_map_single(&dev->dev, skb->data,
539 RX_BUFF_SIZE, DMA_FROM_DEVICE);
540 if (dma_mapping_error(&dev->dev, phys)) {
541 dev_kfree_skb(skb);
542 skb = NULL;
543 }
544 }
545#else
546 skb = netdev_alloc_skb(dev,
547 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
548#endif
549
550 if (!skb) {
551 dev->stats.rx_dropped++;
552
553 desc->buf_len = MAX_MRU;
554 desc->pkt_len = 0;
555 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
556 continue;
557 }
558
559
560#ifdef __ARMEB__
561 temp = skb;
562 skb = port->rx_buff_tab[n];
563 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
564 RX_BUFF_SIZE, DMA_FROM_DEVICE);
565#else
566 dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
567 RX_BUFF_SIZE, DMA_FROM_DEVICE);
568 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
569 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
570#endif
571 skb_reserve(skb, NET_IP_ALIGN);
572 skb_put(skb, desc->pkt_len);
573
574 debug_pkt(dev, "eth_poll", skb->data, skb->len);
575
576 skb->protocol = eth_type_trans(skb, dev);
577 dev->stats.rx_packets++;
578 dev->stats.rx_bytes += skb->len;
579 netif_receive_skb(skb);
580
581
582#ifdef __ARMEB__
583 port->rx_buff_tab[n] = temp;
584 desc->data = phys + NET_IP_ALIGN;
585#endif
586 desc->buf_len = MAX_MRU;
587 desc->pkt_len = 0;
588 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
589 received++;
590 }
591
592#if DEBUG_RX
593 printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
594#endif
595 return received;
596}
597
598
599static void eth_txdone_irq(void *unused)
600{
601 u32 phys;
602
603#if DEBUG_TX
604 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
605#endif
606 while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
607 u32 npe_id, n_desc;
608 struct port *port;
609 struct desc *desc;
610 int start;
611
612 npe_id = phys & 3;
613 BUG_ON(npe_id >= MAX_NPES);
614 port = npe_port_tab[npe_id];
615 BUG_ON(!port);
616 phys &= ~0x1F;
617 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
618 BUG_ON(n_desc >= TX_DESCS);
619 desc = tx_desc_ptr(port, n_desc);
620 debug_desc(phys, desc);
621
622 if (port->tx_buff_tab[n_desc]) {
623 port->netdev->stats.tx_packets++;
624 port->netdev->stats.tx_bytes += desc->pkt_len;
625
626 dma_unmap_tx(port, desc);
627#if DEBUG_TX
628 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
629 port->netdev->name, port->tx_buff_tab[n_desc]);
630#endif
631 free_buffer_irq(port->tx_buff_tab[n_desc]);
632 port->tx_buff_tab[n_desc] = NULL;
633 }
634
635 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
636 queue_put_desc(port->plat->txreadyq, phys, desc);
637 if (start) {
638#if DEBUG_TX
639 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
640 port->netdev->name);
641#endif
642 netif_wake_queue(port->netdev);
643 }
644 }
645}
646
647static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
648{
649 struct port *port = netdev_priv(dev);
650 unsigned int txreadyq = port->plat->txreadyq;
651 int len, offset, bytes, n;
652 void *mem;
653 u32 phys;
654 struct desc *desc;
655
656#if DEBUG_TX
657 printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
658#endif
659
660 if (unlikely(skb->len > MAX_MRU)) {
661 dev_kfree_skb(skb);
662 dev->stats.tx_errors++;
663 return NETDEV_TX_OK;
664 }
665
666 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
667
668 len = skb->len;
669#ifdef __ARMEB__
670 offset = 0;
671 bytes = len;
672 mem = skb->data;
673#else
674 offset = (int)skb->data & 3;
675 bytes = ALIGN(offset + len, 4);
676 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
677 dev_kfree_skb(skb);
678 dev->stats.tx_dropped++;
679 return NETDEV_TX_OK;
680 }
681 memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
682 dev_kfree_skb(skb);
683#endif
684
685 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
686 if (dma_mapping_error(&dev->dev, phys)) {
687#ifdef __ARMEB__
688 dev_kfree_skb(skb);
689#else
690 kfree(mem);
691#endif
692 dev->stats.tx_dropped++;
693 return NETDEV_TX_OK;
694 }
695
696 n = queue_get_desc(txreadyq, port, 1);
697 BUG_ON(n < 0);
698 desc = tx_desc_ptr(port, n);
699
700#ifdef __ARMEB__
701 port->tx_buff_tab[n] = skb;
702#else
703 port->tx_buff_tab[n] = mem;
704#endif
705 desc->data = phys + offset;
706 desc->buf_len = desc->pkt_len = len;
707
708
709 wmb();
710 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
711 dev->trans_start = jiffies;
712
713 if (qmgr_stat_below_low_watermark(txreadyq)) {
714#if DEBUG_TX
715 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
716#endif
717 netif_stop_queue(dev);
718
719
720 if (!qmgr_stat_below_low_watermark(txreadyq)) {
721#if DEBUG_TX
722 printk(KERN_DEBUG "%s: eth_xmit ready again\n",
723 dev->name);
724#endif
725 netif_wake_queue(dev);
726 }
727 }
728
729#if DEBUG_TX
730 printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
731#endif
732 return NETDEV_TX_OK;
733}
734
735
736static void eth_set_mcast_list(struct net_device *dev)
737{
738 struct port *port = netdev_priv(dev);
739 struct dev_mc_list *mclist;
740 u8 diffs[ETH_ALEN], *addr;
741 int i;
742
743 if ((dev->flags & IFF_PROMISC) || netdev_mc_empty(dev)) {
744 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
745 &port->regs->rx_control[0]);
746 return;
747 }
748
749 memset(diffs, 0, ETH_ALEN);
750
751 addr = NULL;
752 netdev_for_each_mc_addr(mclist, dev) {
753 if (!addr)
754 addr = mclist->dmi_addr;
755 for (i = 0; i < ETH_ALEN; i++)
756 diffs[i] |= addr[i] ^ mclist->dmi_addr[i];
757 }
758
759 for (i = 0; i < ETH_ALEN; i++) {
760 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
761 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
762 }
763
764 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
765 &port->regs->rx_control[0]);
766}
767
768
769static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
770{
771 struct port *port = netdev_priv(dev);
772
773 if (!netif_running(dev))
774 return -EINVAL;
775 return phy_mii_ioctl(port->phydev, if_mii(req), cmd);
776}
777
778
779
780static void ixp4xx_get_drvinfo(struct net_device *dev,
781 struct ethtool_drvinfo *info)
782{
783 struct port *port = netdev_priv(dev);
784 strcpy(info->driver, DRV_NAME);
785 snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
786 port->firmware[0], port->firmware[1],
787 port->firmware[2], port->firmware[3]);
788 strcpy(info->bus_info, "internal");
789}
790
791static int ixp4xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
792{
793 struct port *port = netdev_priv(dev);
794 return phy_ethtool_gset(port->phydev, cmd);
795}
796
797static int ixp4xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
798{
799 struct port *port = netdev_priv(dev);
800 return phy_ethtool_sset(port->phydev, cmd);
801}
802
803static int ixp4xx_nway_reset(struct net_device *dev)
804{
805 struct port *port = netdev_priv(dev);
806 return phy_start_aneg(port->phydev);
807}
808
809static const struct ethtool_ops ixp4xx_ethtool_ops = {
810 .get_drvinfo = ixp4xx_get_drvinfo,
811 .get_settings = ixp4xx_get_settings,
812 .set_settings = ixp4xx_set_settings,
813 .nway_reset = ixp4xx_nway_reset,
814 .get_link = ethtool_op_get_link,
815};
816
817
818static int request_queues(struct port *port)
819{
820 int err;
821
822 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
823 "%s:RX-free", port->netdev->name);
824 if (err)
825 return err;
826
827 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
828 "%s:RX", port->netdev->name);
829 if (err)
830 goto rel_rxfree;
831
832 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
833 "%s:TX", port->netdev->name);
834 if (err)
835 goto rel_rx;
836
837 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
838 "%s:TX-ready", port->netdev->name);
839 if (err)
840 goto rel_tx;
841
842
843 if (!ports_open) {
844 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
845 "%s:TX-done", DRV_NAME);
846 if (err)
847 goto rel_txready;
848 }
849 return 0;
850
851rel_txready:
852 qmgr_release_queue(port->plat->txreadyq);
853rel_tx:
854 qmgr_release_queue(TX_QUEUE(port->id));
855rel_rx:
856 qmgr_release_queue(port->plat->rxq);
857rel_rxfree:
858 qmgr_release_queue(RXFREE_QUEUE(port->id));
859 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
860 port->netdev->name);
861 return err;
862}
863
864static void release_queues(struct port *port)
865{
866 qmgr_release_queue(RXFREE_QUEUE(port->id));
867 qmgr_release_queue(port->plat->rxq);
868 qmgr_release_queue(TX_QUEUE(port->id));
869 qmgr_release_queue(port->plat->txreadyq);
870
871 if (!ports_open)
872 qmgr_release_queue(TXDONE_QUEUE);
873}
874
875static int init_queues(struct port *port)
876{
877 int i;
878
879 if (!ports_open)
880 if (!(dma_pool = dma_pool_create(DRV_NAME, NULL,
881 POOL_ALLOC_SIZE, 32, 0)))
882 return -ENOMEM;
883
884 if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
885 &port->desc_tab_phys)))
886 return -ENOMEM;
887 memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
888 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab));
889 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
890
891
892 for (i = 0; i < RX_DESCS; i++) {
893 struct desc *desc = rx_desc_ptr(port, i);
894 buffer_t *buff;
895 void *data;
896#ifdef __ARMEB__
897 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
898 return -ENOMEM;
899 data = buff->data;
900#else
901 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
902 return -ENOMEM;
903 data = buff;
904#endif
905 desc->buf_len = MAX_MRU;
906 desc->data = dma_map_single(&port->netdev->dev, data,
907 RX_BUFF_SIZE, DMA_FROM_DEVICE);
908 if (dma_mapping_error(&port->netdev->dev, desc->data)) {
909 free_buffer(buff);
910 return -EIO;
911 }
912 desc->data += NET_IP_ALIGN;
913 port->rx_buff_tab[i] = buff;
914 }
915
916 return 0;
917}
918
919static void destroy_queues(struct port *port)
920{
921 int i;
922
923 if (port->desc_tab) {
924 for (i = 0; i < RX_DESCS; i++) {
925 struct desc *desc = rx_desc_ptr(port, i);
926 buffer_t *buff = port->rx_buff_tab[i];
927 if (buff) {
928 dma_unmap_single(&port->netdev->dev,
929 desc->data - NET_IP_ALIGN,
930 RX_BUFF_SIZE, DMA_FROM_DEVICE);
931 free_buffer(buff);
932 }
933 }
934 for (i = 0; i < TX_DESCS; i++) {
935 struct desc *desc = tx_desc_ptr(port, i);
936 buffer_t *buff = port->tx_buff_tab[i];
937 if (buff) {
938 dma_unmap_tx(port, desc);
939 free_buffer(buff);
940 }
941 }
942 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
943 port->desc_tab = NULL;
944 }
945
946 if (!ports_open && dma_pool) {
947 dma_pool_destroy(dma_pool);
948 dma_pool = NULL;
949 }
950}
951
952static int eth_open(struct net_device *dev)
953{
954 struct port *port = netdev_priv(dev);
955 struct npe *npe = port->npe;
956 struct msg msg;
957 int i, err;
958
959 if (!npe_running(npe)) {
960 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
961 if (err)
962 return err;
963
964 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
965 printk(KERN_ERR "%s: %s not responding\n", dev->name,
966 npe_name(npe));
967 return -EIO;
968 }
969 port->firmware[0] = msg.byte4;
970 port->firmware[1] = msg.byte5;
971 port->firmware[2] = msg.byte6;
972 port->firmware[3] = msg.byte7;
973 }
974
975 memset(&msg, 0, sizeof(msg));
976 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
977 msg.eth_id = port->id;
978 msg.byte5 = port->plat->rxq | 0x80;
979 msg.byte7 = port->plat->rxq << 4;
980 for (i = 0; i < 8; i++) {
981 msg.byte3 = i;
982 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
983 return -EIO;
984 }
985
986 msg.cmd = NPE_EDB_SETPORTADDRESS;
987 msg.eth_id = PHYSICAL_ID(port->id);
988 msg.byte2 = dev->dev_addr[0];
989 msg.byte3 = dev->dev_addr[1];
990 msg.byte4 = dev->dev_addr[2];
991 msg.byte5 = dev->dev_addr[3];
992 msg.byte6 = dev->dev_addr[4];
993 msg.byte7 = dev->dev_addr[5];
994 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
995 return -EIO;
996
997 memset(&msg, 0, sizeof(msg));
998 msg.cmd = NPE_FW_SETFIREWALLMODE;
999 msg.eth_id = port->id;
1000 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
1001 return -EIO;
1002
1003 if ((err = request_queues(port)) != 0)
1004 return err;
1005
1006 if ((err = init_queues(port)) != 0) {
1007 destroy_queues(port);
1008 release_queues(port);
1009 return err;
1010 }
1011
1012 port->speed = 0;
1013 phy_start(port->phydev);
1014
1015 for (i = 0; i < ETH_ALEN; i++)
1016 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
1017 __raw_writel(0x08, &port->regs->random_seed);
1018 __raw_writel(0x12, &port->regs->partial_empty_threshold);
1019 __raw_writel(0x30, &port->regs->partial_full_threshold);
1020 __raw_writel(0x08, &port->regs->tx_start_bytes);
1021 __raw_writel(0x15, &port->regs->tx_deferral);
1022 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
1023 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
1024 __raw_writel(0x80, &port->regs->slot_time);
1025 __raw_writel(0x01, &port->regs->int_clock_threshold);
1026
1027
1028 for (i = 0; i < TX_DESCS; i++)
1029 queue_put_desc(port->plat->txreadyq,
1030 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1031
1032 for (i = 0; i < RX_DESCS; i++)
1033 queue_put_desc(RXFREE_QUEUE(port->id),
1034 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1035
1036 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1037 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1038 __raw_writel(0, &port->regs->rx_control[1]);
1039 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1040
1041 napi_enable(&port->napi);
1042 eth_set_mcast_list(dev);
1043 netif_start_queue(dev);
1044
1045 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1046 eth_rx_irq, dev);
1047 if (!ports_open) {
1048 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1049 eth_txdone_irq, NULL);
1050 qmgr_enable_irq(TXDONE_QUEUE);
1051 }
1052 ports_open++;
1053
1054 napi_schedule(&port->napi);
1055 return 0;
1056}
1057
1058static int eth_close(struct net_device *dev)
1059{
1060 struct port *port = netdev_priv(dev);
1061 struct msg msg;
1062 int buffs = RX_DESCS;
1063 int i;
1064
1065 ports_open--;
1066 qmgr_disable_irq(port->plat->rxq);
1067 napi_disable(&port->napi);
1068 netif_stop_queue(dev);
1069
1070 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1071 buffs--;
1072
1073 memset(&msg, 0, sizeof(msg));
1074 msg.cmd = NPE_SETLOOPBACK_MODE;
1075 msg.eth_id = port->id;
1076 msg.byte3 = 1;
1077 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1078 printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
1079
1080 i = 0;
1081 do {
1082 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1083 buffs--;
1084 if (!buffs)
1085 break;
1086 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1087
1088 struct desc *desc;
1089 u32 phys;
1090 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1091 BUG_ON(n < 0);
1092 desc = tx_desc_ptr(port, n);
1093 phys = tx_desc_phys(port, n);
1094 desc->buf_len = desc->pkt_len = 1;
1095 wmb();
1096 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1097 }
1098 udelay(1);
1099 } while (++i < MAX_CLOSE_WAIT);
1100
1101 if (buffs)
1102 printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
1103 " left in NPE\n", dev->name, buffs);
1104#if DEBUG_CLOSE
1105 if (!buffs)
1106 printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
1107#endif
1108
1109 buffs = TX_DESCS;
1110 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1111 buffs--;
1112
1113 i = 0;
1114 do {
1115 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1116 buffs--;
1117 if (!buffs)
1118 break;
1119 } while (++i < MAX_CLOSE_WAIT);
1120
1121 if (buffs)
1122 printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
1123 "left in NPE\n", dev->name, buffs);
1124#if DEBUG_CLOSE
1125 if (!buffs)
1126 printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
1127#endif
1128
1129 msg.byte3 = 0;
1130 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1131 printk(KERN_CRIT "%s: unable to disable loopback\n",
1132 dev->name);
1133
1134 phy_stop(port->phydev);
1135
1136 if (!ports_open)
1137 qmgr_disable_irq(TXDONE_QUEUE);
1138 destroy_queues(port);
1139 release_queues(port);
1140 return 0;
1141}
1142
1143static const struct net_device_ops ixp4xx_netdev_ops = {
1144 .ndo_open = eth_open,
1145 .ndo_stop = eth_close,
1146 .ndo_start_xmit = eth_xmit,
1147 .ndo_set_multicast_list = eth_set_mcast_list,
1148 .ndo_do_ioctl = eth_ioctl,
1149 .ndo_change_mtu = eth_change_mtu,
1150 .ndo_set_mac_address = eth_mac_addr,
1151 .ndo_validate_addr = eth_validate_addr,
1152};
1153
1154static int __devinit eth_init_one(struct platform_device *pdev)
1155{
1156 struct port *port;
1157 struct net_device *dev;
1158 struct eth_plat_info *plat = pdev->dev.platform_data;
1159 u32 regs_phys;
1160 char phy_id[MII_BUS_ID_SIZE + 3];
1161 int err;
1162
1163 if (!(dev = alloc_etherdev(sizeof(struct port))))
1164 return -ENOMEM;
1165
1166 SET_NETDEV_DEV(dev, &pdev->dev);
1167 port = netdev_priv(dev);
1168 port->netdev = dev;
1169 port->id = pdev->id;
1170
1171 switch (port->id) {
1172 case IXP4XX_ETH_NPEA:
1173 port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
1174 regs_phys = IXP4XX_EthA_BASE_PHYS;
1175 break;
1176 case IXP4XX_ETH_NPEB:
1177 port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
1178 regs_phys = IXP4XX_EthB_BASE_PHYS;
1179 break;
1180 case IXP4XX_ETH_NPEC:
1181 port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
1182 regs_phys = IXP4XX_EthC_BASE_PHYS;
1183 break;
1184 default:
1185 err = -ENODEV;
1186 goto err_free;
1187 }
1188
1189 dev->netdev_ops = &ixp4xx_netdev_ops;
1190 dev->ethtool_ops = &ixp4xx_ethtool_ops;
1191 dev->tx_queue_len = 100;
1192
1193 netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
1194
1195 if (!(port->npe = npe_request(NPE_ID(port->id)))) {
1196 err = -EIO;
1197 goto err_free;
1198 }
1199
1200 port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
1201 if (!port->mem_res) {
1202 err = -EBUSY;
1203 goto err_npe_rel;
1204 }
1205
1206 port->plat = plat;
1207 npe_port_tab[NPE_ID(port->id)] = port;
1208 memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
1209
1210 platform_set_drvdata(pdev, dev);
1211
1212 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1213 &port->regs->core_control);
1214 udelay(50);
1215 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1216 udelay(50);
1217
1218 snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, "0", plat->phy);
1219 port->phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link, 0,
1220 PHY_INTERFACE_MODE_MII);
1221 if ((err = IS_ERR(port->phydev)))
1222 goto err_free_mem;
1223
1224 port->phydev->irq = PHY_POLL;
1225
1226 if ((err = register_netdev(dev)))
1227 goto err_phy_dis;
1228
1229 printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
1230 npe_name(port->npe));
1231
1232 return 0;
1233
1234err_phy_dis:
1235 phy_disconnect(port->phydev);
1236err_free_mem:
1237 npe_port_tab[NPE_ID(port->id)] = NULL;
1238 platform_set_drvdata(pdev, NULL);
1239 release_resource(port->mem_res);
1240err_npe_rel:
1241 npe_release(port->npe);
1242err_free:
1243 free_netdev(dev);
1244 return err;
1245}
1246
1247static int __devexit eth_remove_one(struct platform_device *pdev)
1248{
1249 struct net_device *dev = platform_get_drvdata(pdev);
1250 struct port *port = netdev_priv(dev);
1251
1252 unregister_netdev(dev);
1253 phy_disconnect(port->phydev);
1254 npe_port_tab[NPE_ID(port->id)] = NULL;
1255 platform_set_drvdata(pdev, NULL);
1256 npe_release(port->npe);
1257 release_resource(port->mem_res);
1258 free_netdev(dev);
1259 return 0;
1260}
1261
1262static struct platform_driver ixp4xx_eth_driver = {
1263 .driver.name = DRV_NAME,
1264 .probe = eth_init_one,
1265 .remove = eth_remove_one,
1266};
1267
1268static int __init eth_init_module(void)
1269{
1270 int err;
1271 if ((err = ixp4xx_mdio_register()))
1272 return err;
1273 return platform_driver_register(&ixp4xx_eth_driver);
1274}
1275
1276static void __exit eth_cleanup_module(void)
1277{
1278 platform_driver_unregister(&ixp4xx_eth_driver);
1279 ixp4xx_mdio_remove();
1280}
1281
1282MODULE_AUTHOR("Krzysztof Halasa");
1283MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1284MODULE_LICENSE("GPL v2");
1285MODULE_ALIAS("platform:ixp4xx_eth");
1286module_init(eth_init_module);
1287module_exit(eth_cleanup_module);
1288
