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[UDP]: Make use of inet_iif() when doing socket lookups.
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / net / b44.c
blob3d247f3f4a3c375d285e10caf025fa6fc16f6d3b
1 /* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 * Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi)
5 * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
6 * Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org)
7 * Copyright (C) 2006 Broadcom Corporation.
8 * Copyright (C) 2007 Michael Buesch <mb@bu3sch.de>
9 *
10 * Distribute under GPL.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/types.h>
17 #include <linux/netdevice.h>
18 #include <linux/ethtool.h>
19 #include <linux/mii.h>
20 #include <linux/if_ether.h>
21 #include <linux/if_vlan.h>
22 #include <linux/etherdevice.h>
23 #include <linux/pci.h>
24 #include <linux/delay.h>
25 #include <linux/init.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/ssb/ssb.h>
28
29 #include <asm/uaccess.h>
30 #include <asm/io.h>
31 #include <asm/irq.h>
32
33
34 #include "b44.h"
35
36 #define DRV_MODULE_NAME "b44"
37 #define PFX DRV_MODULE_NAME ": "
38 #define DRV_MODULE_VERSION "2.0"
39
40 #define B44_DEF_MSG_ENABLE \
41 (NETIF_MSG_DRV | \
42 NETIF_MSG_PROBE | \
43 NETIF_MSG_LINK | \
44 NETIF_MSG_TIMER | \
45 NETIF_MSG_IFDOWN | \
46 NETIF_MSG_IFUP | \
47 NETIF_MSG_RX_ERR | \
48 NETIF_MSG_TX_ERR)
49
50 /* length of time before we decide the hardware is borked,
51 * and dev->tx_timeout() should be called to fix the problem
52 */
53 #define B44_TX_TIMEOUT (5 * HZ)
54
55 /* hardware minimum and maximum for a single frame's data payload */
56 #define B44_MIN_MTU 60
57 #define B44_MAX_MTU 1500
58
59 #define B44_RX_RING_SIZE 512
60 #define B44_DEF_RX_RING_PENDING 200
61 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
62 B44_RX_RING_SIZE)
63 #define B44_TX_RING_SIZE 512
64 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
65 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
66 B44_TX_RING_SIZE)
67
68 #define TX_RING_GAP(BP) \
69 (B44_TX_RING_SIZE - (BP)->tx_pending)
70 #define TX_BUFFS_AVAIL(BP) \
71 (((BP)->tx_cons <= (BP)->tx_prod) ? \
72 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
73 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
74 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
75
76 #define RX_PKT_OFFSET 30
77 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET + 64)
78
79 /* minimum number of free TX descriptors required to wake up TX process */
80 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
81
82 /* b44 internal pattern match filter info */
83 #define B44_PATTERN_BASE 0x400
84 #define B44_PATTERN_SIZE 0x80
85 #define B44_PMASK_BASE 0x600
86 #define B44_PMASK_SIZE 0x10
87 #define B44_MAX_PATTERNS 16
88 #define B44_ETHIPV6UDP_HLEN 62
89 #define B44_ETHIPV4UDP_HLEN 42
90
91 static char version[] __devinitdata =
92 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION "\n";
93
94 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
95 MODULE_DESCRIPTION("Broadcom 44xx/47xx 10/100 PCI ethernet driver");
96 MODULE_LICENSE("GPL");
97 MODULE_VERSION(DRV_MODULE_VERSION);
98
99 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
100 module_param(b44_debug, int, 0);
101 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
102
103
104 #ifdef CONFIG_B44_PCI
105 static const struct pci_device_id b44_pci_tbl[] = {
106 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
107 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
108 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
109 { 0 } /* terminate list with empty entry */
110 };
111 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
112
113 static struct pci_driver b44_pci_driver = {
114 .name = DRV_MODULE_NAME,
115 .id_table = b44_pci_tbl,
116 };
117 #endif /* CONFIG_B44_PCI */
118
119 static const struct ssb_device_id b44_ssb_tbl[] = {
120 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
121 SSB_DEVTABLE_END
122 };
123 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
124
125 static void b44_halt(struct b44 *);
126 static void b44_init_rings(struct b44 *);
127
128 #define B44_FULL_RESET 1
129 #define B44_FULL_RESET_SKIP_PHY 2
130 #define B44_PARTIAL_RESET 3
131
132 static void b44_init_hw(struct b44 *, int);
133
134 static int dma_desc_align_mask;
135 static int dma_desc_sync_size;
136 static int instance;
137
138 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
139 #define _B44(x...) # x,
140 B44_STAT_REG_DECLARE
141 #undef _B44
142 };
143
144 static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
145 dma_addr_t dma_base,
146 unsigned long offset,
147 enum dma_data_direction dir)
148 {
149 dma_sync_single_range_for_device(sdev->dev, dma_base,
150 offset & dma_desc_align_mask,
151 dma_desc_sync_size, dir);
152 }
153
154 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
155 dma_addr_t dma_base,
156 unsigned long offset,
157 enum dma_data_direction dir)
158 {
159 dma_sync_single_range_for_cpu(sdev->dev, dma_base,
160 offset & dma_desc_align_mask,
161 dma_desc_sync_size, dir);
162 }
163
164 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
165 {
166 return ssb_read32(bp->sdev, reg);
167 }
168
169 static inline void bw32(const struct b44 *bp,
170 unsigned long reg, unsigned long val)
171 {
172 ssb_write32(bp->sdev, reg, val);
173 }
174
175 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
176 u32 bit, unsigned long timeout, const int clear)
177 {
178 unsigned long i;
179
180 for (i = 0; i < timeout; i++) {
181 u32 val = br32(bp, reg);
182
183 if (clear && !(val & bit))
184 break;
185 if (!clear && (val & bit))
186 break;
187 udelay(10);
188 }
189 if (i == timeout) {
190 printk(KERN_ERR PFX "%s: BUG! Timeout waiting for bit %08x of register "
191 "%lx to %s.\n",
192 bp->dev->name,
193 bit, reg,
194 (clear ? "clear" : "set"));
195 return -ENODEV;
196 }
197 return 0;
198 }
199
200 static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
201 {
202 u32 val;
203
204 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
205 (index << CAM_CTRL_INDEX_SHIFT)));
206
207 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
208
209 val = br32(bp, B44_CAM_DATA_LO);
210
211 data[2] = (val >> 24) & 0xFF;
212 data[3] = (val >> 16) & 0xFF;
213 data[4] = (val >> 8) & 0xFF;
214 data[5] = (val >> 0) & 0xFF;
215
216 val = br32(bp, B44_CAM_DATA_HI);
217
218 data[0] = (val >> 8) & 0xFF;
219 data[1] = (val >> 0) & 0xFF;
220 }
221
222 static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
223 {
224 u32 val;
225
226 val = ((u32) data[2]) << 24;
227 val |= ((u32) data[3]) << 16;
228 val |= ((u32) data[4]) << 8;
229 val |= ((u32) data[5]) << 0;
230 bw32(bp, B44_CAM_DATA_LO, val);
231 val = (CAM_DATA_HI_VALID |
232 (((u32) data[0]) << 8) |
233 (((u32) data[1]) << 0));
234 bw32(bp, B44_CAM_DATA_HI, val);
235 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
236 (index << CAM_CTRL_INDEX_SHIFT)));
237 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
238 }
239
240 static inline void __b44_disable_ints(struct b44 *bp)
241 {
242 bw32(bp, B44_IMASK, 0);
243 }
244
245 static void b44_disable_ints(struct b44 *bp)
246 {
247 __b44_disable_ints(bp);
248
249 /* Flush posted writes. */
250 br32(bp, B44_IMASK);
251 }
252
253 static void b44_enable_ints(struct b44 *bp)
254 {
255 bw32(bp, B44_IMASK, bp->imask);
256 }
257
258 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
259 {
260 int err;
261
262 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
263 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
264 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
265 (phy_addr << MDIO_DATA_PMD_SHIFT) |
266 (reg << MDIO_DATA_RA_SHIFT) |
267 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
268 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
269 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
270
271 return err;
272 }
273
274 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
275 {
276 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
277 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
278 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
279 (phy_addr << MDIO_DATA_PMD_SHIFT) |
280 (reg << MDIO_DATA_RA_SHIFT) |
281 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
282 (val & MDIO_DATA_DATA)));
283 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
284 }
285
286 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
287 {
288 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
289 return 0;
290
291 return __b44_readphy(bp, bp->phy_addr, reg, val);
292 }
293
294 static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
295 {
296 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
297 return 0;
298
299 return __b44_writephy(bp, bp->phy_addr, reg, val);
300 }
301
302 /* miilib interface */
303 static int b44_mii_read(struct net_device *dev, int phy_id, int location)
304 {
305 u32 val;
306 struct b44 *bp = netdev_priv(dev);
307 int rc = __b44_readphy(bp, phy_id, location, &val);
308 if (rc)
309 return 0xffffffff;
310 return val;
311 }
312
313 static void b44_mii_write(struct net_device *dev, int phy_id, int location,
314 int val)
315 {
316 struct b44 *bp = netdev_priv(dev);
317 __b44_writephy(bp, phy_id, location, val);
318 }
319
320 static int b44_phy_reset(struct b44 *bp)
321 {
322 u32 val;
323 int err;
324
325 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
326 return 0;
327 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
328 if (err)
329 return err;
330 udelay(100);
331 err = b44_readphy(bp, MII_BMCR, &val);
332 if (!err) {
333 if (val & BMCR_RESET) {
334 printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
335 bp->dev->name);
336 err = -ENODEV;
337 }
338 }
339
340 return 0;
341 }
342
343 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
344 {
345 u32 val;
346
347 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
348 bp->flags |= pause_flags;
349
350 val = br32(bp, B44_RXCONFIG);
351 if (pause_flags & B44_FLAG_RX_PAUSE)
352 val |= RXCONFIG_FLOW;
353 else
354 val &= ~RXCONFIG_FLOW;
355 bw32(bp, B44_RXCONFIG, val);
356
357 val = br32(bp, B44_MAC_FLOW);
358 if (pause_flags & B44_FLAG_TX_PAUSE)
359 val |= (MAC_FLOW_PAUSE_ENAB |
360 (0xc0 & MAC_FLOW_RX_HI_WATER));
361 else
362 val &= ~MAC_FLOW_PAUSE_ENAB;
363 bw32(bp, B44_MAC_FLOW, val);
364 }
365
366 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
367 {
368 u32 pause_enab = 0;
369
370 /* The driver supports only rx pause by default because
371 the b44 mac tx pause mechanism generates excessive
372 pause frames.
373 Use ethtool to turn on b44 tx pause if necessary.
374 */
375 if ((local & ADVERTISE_PAUSE_CAP) &&
376 (local & ADVERTISE_PAUSE_ASYM)){
377 if ((remote & LPA_PAUSE_ASYM) &&
378 !(remote & LPA_PAUSE_CAP))
379 pause_enab |= B44_FLAG_RX_PAUSE;
380 }
381
382 __b44_set_flow_ctrl(bp, pause_enab);
383 }
384
385 #ifdef SSB_DRIVER_MIPS
386 extern char *nvram_get(char *name);
387 static void b44_wap54g10_workaround(struct b44 *bp)
388 {
389 const char *str;
390 u32 val;
391 int err;
392
393 /*
394 * workaround for bad hardware design in Linksys WAP54G v1.0
395 * see https://dev.openwrt.org/ticket/146
396 * check and reset bit "isolate"
397 */
398 str = nvram_get("boardnum");
399 if (!str)
400 return;
401 if (simple_strtoul(str, NULL, 0) == 2) {
402 err = __b44_readphy(bp, 0, MII_BMCR, &val);
403 if (err)
404 goto error;
405 if (!(val & BMCR_ISOLATE))
406 return;
407 val &= ~BMCR_ISOLATE;
408 err = __b44_writephy(bp, 0, MII_BMCR, val);
409 if (err)
410 goto error;
411 }
412 return;
413 error:
414 printk(KERN_WARNING PFX "PHY: cannot reset MII transceiver isolate bit.\n");
415 }
416 #else
417 static inline void b44_wap54g10_workaround(struct b44 *bp)
418 {
419 }
420 #endif
421
422 static int b44_setup_phy(struct b44 *bp)
423 {
424 u32 val;
425 int err;
426
427 b44_wap54g10_workaround(bp);
428
429 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
430 return 0;
431 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
432 goto out;
433 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
434 val & MII_ALEDCTRL_ALLMSK)) != 0)
435 goto out;
436 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
437 goto out;
438 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
439 val | MII_TLEDCTRL_ENABLE)) != 0)
440 goto out;
441
442 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
443 u32 adv = ADVERTISE_CSMA;
444
445 if (bp->flags & B44_FLAG_ADV_10HALF)
446 adv |= ADVERTISE_10HALF;
447 if (bp->flags & B44_FLAG_ADV_10FULL)
448 adv |= ADVERTISE_10FULL;
449 if (bp->flags & B44_FLAG_ADV_100HALF)
450 adv |= ADVERTISE_100HALF;
451 if (bp->flags & B44_FLAG_ADV_100FULL)
452 adv |= ADVERTISE_100FULL;
453
454 if (bp->flags & B44_FLAG_PAUSE_AUTO)
455 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
456
457 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
458 goto out;
459 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
460 BMCR_ANRESTART))) != 0)
461 goto out;
462 } else {
463 u32 bmcr;
464
465 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
466 goto out;
467 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
468 if (bp->flags & B44_FLAG_100_BASE_T)
469 bmcr |= BMCR_SPEED100;
470 if (bp->flags & B44_FLAG_FULL_DUPLEX)
471 bmcr |= BMCR_FULLDPLX;
472 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
473 goto out;
474
475 /* Since we will not be negotiating there is no safe way
476 * to determine if the link partner supports flow control
477 * or not. So just disable it completely in this case.
478 */
479 b44_set_flow_ctrl(bp, 0, 0);
480 }
481
482 out:
483 return err;
484 }
485
486 static void b44_stats_update(struct b44 *bp)
487 {
488 unsigned long reg;
489 u32 *val;
490
491 val = &bp->hw_stats.tx_good_octets;
492 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
493 *val++ += br32(bp, reg);
494 }
495
496 /* Pad */
497 reg += 8*4UL;
498
499 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
500 *val++ += br32(bp, reg);
501 }
502 }
503
504 static void b44_link_report(struct b44 *bp)
505 {
506 if (!netif_carrier_ok(bp->dev)) {
507 printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
508 } else {
509 printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
510 bp->dev->name,
511 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
512 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
513
514 printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
515 "%s for RX.\n",
516 bp->dev->name,
517 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
518 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
519 }
520 }
521
522 static void b44_check_phy(struct b44 *bp)
523 {
524 u32 bmsr, aux;
525
526 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
527 bp->flags |= B44_FLAG_100_BASE_T;
528 bp->flags |= B44_FLAG_FULL_DUPLEX;
529 if (!netif_carrier_ok(bp->dev)) {
530 u32 val = br32(bp, B44_TX_CTRL);
531 val |= TX_CTRL_DUPLEX;
532 bw32(bp, B44_TX_CTRL, val);
533 netif_carrier_on(bp->dev);
534 b44_link_report(bp);
535 }
536 return;
537 }
538
539 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
540 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
541 (bmsr != 0xffff)) {
542 if (aux & MII_AUXCTRL_SPEED)
543 bp->flags |= B44_FLAG_100_BASE_T;
544 else
545 bp->flags &= ~B44_FLAG_100_BASE_T;
546 if (aux & MII_AUXCTRL_DUPLEX)
547 bp->flags |= B44_FLAG_FULL_DUPLEX;
548 else
549 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
550
551 if (!netif_carrier_ok(bp->dev) &&
552 (bmsr & BMSR_LSTATUS)) {
553 u32 val = br32(bp, B44_TX_CTRL);
554 u32 local_adv, remote_adv;
555
556 if (bp->flags & B44_FLAG_FULL_DUPLEX)
557 val |= TX_CTRL_DUPLEX;
558 else
559 val &= ~TX_CTRL_DUPLEX;
560 bw32(bp, B44_TX_CTRL, val);
561
562 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
563 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
564 !b44_readphy(bp, MII_LPA, &remote_adv))
565 b44_set_flow_ctrl(bp, local_adv, remote_adv);
566
567 /* Link now up */
568 netif_carrier_on(bp->dev);
569 b44_link_report(bp);
570 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
571 /* Link now down */
572 netif_carrier_off(bp->dev);
573 b44_link_report(bp);
574 }
575
576 if (bmsr & BMSR_RFAULT)
577 printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
578 bp->dev->name);
579 if (bmsr & BMSR_JCD)
580 printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
581 bp->dev->name);
582 }
583 }
584
585 static void b44_timer(unsigned long __opaque)
586 {
587 struct b44 *bp = (struct b44 *) __opaque;
588
589 spin_lock_irq(&bp->lock);
590
591 b44_check_phy(bp);
592
593 b44_stats_update(bp);
594
595 spin_unlock_irq(&bp->lock);
596
597 mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
598 }
599
600 static void b44_tx(struct b44 *bp)
601 {
602 u32 cur, cons;
603
604 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
605 cur /= sizeof(struct dma_desc);
606
607 /* XXX needs updating when NETIF_F_SG is supported */
608 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
609 struct ring_info *rp = &bp->tx_buffers[cons];
610 struct sk_buff *skb = rp->skb;
611
612 BUG_ON(skb == NULL);
613
614 dma_unmap_single(bp->sdev->dev,
615 rp->mapping,
616 skb->len,
617 DMA_TO_DEVICE);
618 rp->skb = NULL;
619 dev_kfree_skb_irq(skb);
620 }
621
622 bp->tx_cons = cons;
623 if (netif_queue_stopped(bp->dev) &&
624 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
625 netif_wake_queue(bp->dev);
626
627 bw32(bp, B44_GPTIMER, 0);
628 }
629
630 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
631 * before the DMA address you give it. So we allocate 30 more bytes
632 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
633 * point the chip at 30 bytes past where the rx_header will go.
634 */
635 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
636 {
637 struct dma_desc *dp;
638 struct ring_info *src_map, *map;
639 struct rx_header *rh;
640 struct sk_buff *skb;
641 dma_addr_t mapping;
642 int dest_idx;
643 u32 ctrl;
644
645 src_map = NULL;
646 if (src_idx >= 0)
647 src_map = &bp->rx_buffers[src_idx];
648 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
649 map = &bp->rx_buffers[dest_idx];
650 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
651 if (skb == NULL)
652 return -ENOMEM;
653
654 mapping = dma_map_single(bp->sdev->dev, skb->data,
655 RX_PKT_BUF_SZ,
656 DMA_FROM_DEVICE);
657
658 /* Hardware bug work-around, the chip is unable to do PCI DMA
659 to/from anything above 1GB :-( */
660 if (dma_mapping_error(mapping) ||
661 mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
662 /* Sigh... */
663 if (!dma_mapping_error(mapping))
664 dma_unmap_single(bp->sdev->dev, mapping,
665 RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
666 dev_kfree_skb_any(skb);
667 skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
668 if (skb == NULL)
669 return -ENOMEM;
670 mapping = dma_map_single(bp->sdev->dev, skb->data,
671 RX_PKT_BUF_SZ,
672 DMA_FROM_DEVICE);
673 if (dma_mapping_error(mapping) ||
674 mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
675 if (!dma_mapping_error(mapping))
676 dma_unmap_single(bp->sdev->dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
677 dev_kfree_skb_any(skb);
678 return -ENOMEM;
679 }
680 }
681
682 rh = (struct rx_header *) skb->data;
683 skb_reserve(skb, RX_PKT_OFFSET);
684
685 rh->len = 0;
686 rh->flags = 0;
687
688 map->skb = skb;
689 map->mapping = mapping;
690
691 if (src_map != NULL)
692 src_map->skb = NULL;
693
694 ctrl = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - RX_PKT_OFFSET));
695 if (dest_idx == (B44_RX_RING_SIZE - 1))
696 ctrl |= DESC_CTRL_EOT;
697
698 dp = &bp->rx_ring[dest_idx];
699 dp->ctrl = cpu_to_le32(ctrl);
700 dp->addr = cpu_to_le32((u32) mapping + RX_PKT_OFFSET + bp->dma_offset);
701
702 if (bp->flags & B44_FLAG_RX_RING_HACK)
703 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
704 dest_idx * sizeof(dp),
705 DMA_BIDIRECTIONAL);
706
707 return RX_PKT_BUF_SZ;
708 }
709
710 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
711 {
712 struct dma_desc *src_desc, *dest_desc;
713 struct ring_info *src_map, *dest_map;
714 struct rx_header *rh;
715 int dest_idx;
716 __le32 ctrl;
717
718 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
719 dest_desc = &bp->rx_ring[dest_idx];
720 dest_map = &bp->rx_buffers[dest_idx];
721 src_desc = &bp->rx_ring[src_idx];
722 src_map = &bp->rx_buffers[src_idx];
723
724 dest_map->skb = src_map->skb;
725 rh = (struct rx_header *) src_map->skb->data;
726 rh->len = 0;
727 rh->flags = 0;
728 dest_map->mapping = src_map->mapping;
729
730 if (bp->flags & B44_FLAG_RX_RING_HACK)
731 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
732 src_idx * sizeof(src_desc),
733 DMA_BIDIRECTIONAL);
734
735 ctrl = src_desc->ctrl;
736 if (dest_idx == (B44_RX_RING_SIZE - 1))
737 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
738 else
739 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
740
741 dest_desc->ctrl = ctrl;
742 dest_desc->addr = src_desc->addr;
743
744 src_map->skb = NULL;
745
746 if (bp->flags & B44_FLAG_RX_RING_HACK)
747 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
748 dest_idx * sizeof(dest_desc),
749 DMA_BIDIRECTIONAL);
750
751 dma_sync_single_for_device(bp->sdev->dev, le32_to_cpu(src_desc->addr),
752 RX_PKT_BUF_SZ,
753 DMA_FROM_DEVICE);
754 }
755
756 static int b44_rx(struct b44 *bp, int budget)
757 {
758 int received;
759 u32 cons, prod;
760
761 received = 0;
762 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
763 prod /= sizeof(struct dma_desc);
764 cons = bp->rx_cons;
765
766 while (cons != prod && budget > 0) {
767 struct ring_info *rp = &bp->rx_buffers[cons];
768 struct sk_buff *skb = rp->skb;
769 dma_addr_t map = rp->mapping;
770 struct rx_header *rh;
771 u16 len;
772
773 dma_sync_single_for_cpu(bp->sdev->dev, map,
774 RX_PKT_BUF_SZ,
775 DMA_FROM_DEVICE);
776 rh = (struct rx_header *) skb->data;
777 len = le16_to_cpu(rh->len);
778 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
779 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
780 drop_it:
781 b44_recycle_rx(bp, cons, bp->rx_prod);
782 drop_it_no_recycle:
783 bp->stats.rx_dropped++;
784 goto next_pkt;
785 }
786
787 if (len == 0) {
788 int i = 0;
789
790 do {
791 udelay(2);
792 barrier();
793 len = le16_to_cpu(rh->len);
794 } while (len == 0 && i++ < 5);
795 if (len == 0)
796 goto drop_it;
797 }
798
799 /* Omit CRC. */
800 len -= 4;
801
802 if (len > RX_COPY_THRESHOLD) {
803 int skb_size;
804 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
805 if (skb_size < 0)
806 goto drop_it;
807 dma_unmap_single(bp->sdev->dev, map,
808 skb_size, DMA_FROM_DEVICE);
809 /* Leave out rx_header */
810 skb_put(skb, len + RX_PKT_OFFSET);
811 skb_pull(skb, RX_PKT_OFFSET);
812 } else {
813 struct sk_buff *copy_skb;
814
815 b44_recycle_rx(bp, cons, bp->rx_prod);
816 copy_skb = dev_alloc_skb(len + 2);
817 if (copy_skb == NULL)
818 goto drop_it_no_recycle;
819
820 skb_reserve(copy_skb, 2);
821 skb_put(copy_skb, len);
822 /* DMA sync done above, copy just the actual packet */
823 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
824 copy_skb->data, len);
825 skb = copy_skb;
826 }
827 skb->ip_summed = CHECKSUM_NONE;
828 skb->protocol = eth_type_trans(skb, bp->dev);
829 netif_receive_skb(skb);
830 bp->dev->last_rx = jiffies;
831 received++;
832 budget--;
833 next_pkt:
834 bp->rx_prod = (bp->rx_prod + 1) &
835 (B44_RX_RING_SIZE - 1);
836 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
837 }
838
839 bp->rx_cons = cons;
840 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
841
842 return received;
843 }
844
845 static int b44_poll(struct napi_struct *napi, int budget)
846 {
847 struct b44 *bp = container_of(napi, struct b44, napi);
848 struct net_device *netdev = bp->dev;
849 int work_done;
850
851 spin_lock_irq(&bp->lock);
852
853 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
854 /* spin_lock(&bp->tx_lock); */
855 b44_tx(bp);
856 /* spin_unlock(&bp->tx_lock); */
857 }
858 spin_unlock_irq(&bp->lock);
859
860 work_done = 0;
861 if (bp->istat & ISTAT_RX)
862 work_done += b44_rx(bp, budget);
863
864 if (bp->istat & ISTAT_ERRORS) {
865 unsigned long flags;
866
867 spin_lock_irqsave(&bp->lock, flags);
868 b44_halt(bp);
869 b44_init_rings(bp);
870 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
871 netif_wake_queue(bp->dev);
872 spin_unlock_irqrestore(&bp->lock, flags);
873 work_done = 0;
874 }
875
876 if (work_done < budget) {
877 netif_rx_complete(netdev, napi);
878 b44_enable_ints(bp);
879 }
880
881 return work_done;
882 }
883
884 static irqreturn_t b44_interrupt(int irq, void *dev_id)
885 {
886 struct net_device *dev = dev_id;
887 struct b44 *bp = netdev_priv(dev);
888 u32 istat, imask;
889 int handled = 0;
890
891 spin_lock(&bp->lock);
892
893 istat = br32(bp, B44_ISTAT);
894 imask = br32(bp, B44_IMASK);
895
896 /* The interrupt mask register controls which interrupt bits
897 * will actually raise an interrupt to the CPU when set by hw/firmware,
898 * but doesn't mask off the bits.
899 */
900 istat &= imask;
901 if (istat) {
902 handled = 1;
903
904 if (unlikely(!netif_running(dev))) {
905 printk(KERN_INFO "%s: late interrupt.\n", dev->name);
906 goto irq_ack;
907 }
908
909 if (netif_rx_schedule_prep(dev, &bp->napi)) {
910 /* NOTE: These writes are posted by the readback of
911 * the ISTAT register below.
912 */
913 bp->istat = istat;
914 __b44_disable_ints(bp);
915 __netif_rx_schedule(dev, &bp->napi);
916 } else {
917 printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
918 dev->name);
919 }
920
921 irq_ack:
922 bw32(bp, B44_ISTAT, istat);
923 br32(bp, B44_ISTAT);
924 }
925 spin_unlock(&bp->lock);
926 return IRQ_RETVAL(handled);
927 }
928
929 static void b44_tx_timeout(struct net_device *dev)
930 {
931 struct b44 *bp = netdev_priv(dev);
932
933 printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
934 dev->name);
935
936 spin_lock_irq(&bp->lock);
937
938 b44_halt(bp);
939 b44_init_rings(bp);
940 b44_init_hw(bp, B44_FULL_RESET);
941
942 spin_unlock_irq(&bp->lock);
943
944 b44_enable_ints(bp);
945
946 netif_wake_queue(dev);
947 }
948
949 static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
950 {
951 struct b44 *bp = netdev_priv(dev);
952 int rc = NETDEV_TX_OK;
953 dma_addr_t mapping;
954 u32 len, entry, ctrl;
955
956 len = skb->len;
957 spin_lock_irq(&bp->lock);
958
959 /* This is a hard error, log it. */
960 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
961 netif_stop_queue(dev);
962 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
963 dev->name);
964 goto err_out;
965 }
966
967 mapping = dma_map_single(bp->sdev->dev, skb->data, len, DMA_TO_DEVICE);
968 if (dma_mapping_error(mapping) || mapping + len > DMA_30BIT_MASK) {
969 struct sk_buff *bounce_skb;
970
971 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
972 if (!dma_mapping_error(mapping))
973 dma_unmap_single(bp->sdev->dev, mapping, len,
974 DMA_TO_DEVICE);
975
976 bounce_skb = __dev_alloc_skb(len, GFP_ATOMIC | GFP_DMA);
977 if (!bounce_skb)
978 goto err_out;
979
980 mapping = dma_map_single(bp->sdev->dev, bounce_skb->data,
981 len, DMA_TO_DEVICE);
982 if (dma_mapping_error(mapping) || mapping + len > DMA_30BIT_MASK) {
983 if (!dma_mapping_error(mapping))
984 dma_unmap_single(bp->sdev->dev, mapping,
985 len, DMA_TO_DEVICE);
986 dev_kfree_skb_any(bounce_skb);
987 goto err_out;
988 }
989
990 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
991 dev_kfree_skb_any(skb);
992 skb = bounce_skb;
993 }
994
995 entry = bp->tx_prod;
996 bp->tx_buffers[entry].skb = skb;
997 bp->tx_buffers[entry].mapping = mapping;
998
999 ctrl = (len & DESC_CTRL_LEN);
1000 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
1001 if (entry == (B44_TX_RING_SIZE - 1))
1002 ctrl |= DESC_CTRL_EOT;
1003
1004 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1005 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1006
1007 if (bp->flags & B44_FLAG_TX_RING_HACK)
1008 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1009 entry * sizeof(bp->tx_ring[0]),
1010 DMA_TO_DEVICE);
1011
1012 entry = NEXT_TX(entry);
1013
1014 bp->tx_prod = entry;
1015
1016 wmb();
1017
1018 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1019 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1020 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1021 if (bp->flags & B44_FLAG_REORDER_BUG)
1022 br32(bp, B44_DMATX_PTR);
1023
1024 if (TX_BUFFS_AVAIL(bp) < 1)
1025 netif_stop_queue(dev);
1026
1027 dev->trans_start = jiffies;
1028
1029 out_unlock:
1030 spin_unlock_irq(&bp->lock);
1031
1032 return rc;
1033
1034 err_out:
1035 rc = NETDEV_TX_BUSY;
1036 goto out_unlock;
1037 }
1038
1039 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1040 {
1041 struct b44 *bp = netdev_priv(dev);
1042
1043 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1044 return -EINVAL;
1045
1046 if (!netif_running(dev)) {
1047 /* We'll just catch it later when the
1048 * device is up'd.
1049 */
1050 dev->mtu = new_mtu;
1051 return 0;
1052 }
1053
1054 spin_lock_irq(&bp->lock);
1055 b44_halt(bp);
1056 dev->mtu = new_mtu;
1057 b44_init_rings(bp);
1058 b44_init_hw(bp, B44_FULL_RESET);
1059 spin_unlock_irq(&bp->lock);
1060
1061 b44_enable_ints(bp);
1062
1063 return 0;
1064 }
1065
1066 /* Free up pending packets in all rx/tx rings.
1067 *
1068 * The chip has been shut down and the driver detached from
1069 * the networking, so no interrupts or new tx packets will
1070 * end up in the driver. bp->lock is not held and we are not
1071 * in an interrupt context and thus may sleep.
1072 */
1073 static void b44_free_rings(struct b44 *bp)
1074 {
1075 struct ring_info *rp;
1076 int i;
1077
1078 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1079 rp = &bp->rx_buffers[i];
1080
1081 if (rp->skb == NULL)
1082 continue;
1083 dma_unmap_single(bp->sdev->dev, rp->mapping, RX_PKT_BUF_SZ,
1084 DMA_FROM_DEVICE);
1085 dev_kfree_skb_any(rp->skb);
1086 rp->skb = NULL;
1087 }
1088
1089 /* XXX needs changes once NETIF_F_SG is set... */
1090 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1091 rp = &bp->tx_buffers[i];
1092
1093 if (rp->skb == NULL)
1094 continue;
1095 dma_unmap_single(bp->sdev->dev, rp->mapping, rp->skb->len,
1096 DMA_TO_DEVICE);
1097 dev_kfree_skb_any(rp->skb);
1098 rp->skb = NULL;
1099 }
1100 }
1101
1102 /* Initialize tx/rx rings for packet processing.
1103 *
1104 * The chip has been shut down and the driver detached from
1105 * the networking, so no interrupts or new tx packets will
1106 * end up in the driver.
1107 */
1108 static void b44_init_rings(struct b44 *bp)
1109 {
1110 int i;
1111
1112 b44_free_rings(bp);
1113
1114 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1115 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1116
1117 if (bp->flags & B44_FLAG_RX_RING_HACK)
1118 dma_sync_single_for_device(bp->sdev->dev, bp->rx_ring_dma,
1119 DMA_TABLE_BYTES,
1120 DMA_BIDIRECTIONAL);
1121
1122 if (bp->flags & B44_FLAG_TX_RING_HACK)
1123 dma_sync_single_for_device(bp->sdev->dev, bp->tx_ring_dma,
1124 DMA_TABLE_BYTES,
1125 DMA_TO_DEVICE);
1126
1127 for (i = 0; i < bp->rx_pending; i++) {
1128 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1129 break;
1130 }
1131 }
1132
1133 /*
1134 * Must not be invoked with interrupt sources disabled and
1135 * the hardware shutdown down.
1136 */
1137 static void b44_free_consistent(struct b44 *bp)
1138 {
1139 kfree(bp->rx_buffers);
1140 bp->rx_buffers = NULL;
1141 kfree(bp->tx_buffers);
1142 bp->tx_buffers = NULL;
1143 if (bp->rx_ring) {
1144 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1145 dma_unmap_single(bp->sdev->dev, bp->rx_ring_dma,
1146 DMA_TABLE_BYTES,
1147 DMA_BIDIRECTIONAL);
1148 kfree(bp->rx_ring);
1149 } else
1150 dma_free_coherent(bp->sdev->dev, DMA_TABLE_BYTES,
1151 bp->rx_ring, bp->rx_ring_dma);
1152 bp->rx_ring = NULL;
1153 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1154 }
1155 if (bp->tx_ring) {
1156 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1157 dma_unmap_single(bp->sdev->dev, bp->tx_ring_dma,
1158 DMA_TABLE_BYTES,
1159 DMA_TO_DEVICE);
1160 kfree(bp->tx_ring);
1161 } else
1162 dma_free_coherent(bp->sdev->dev, DMA_TABLE_BYTES,
1163 bp->tx_ring, bp->tx_ring_dma);
1164 bp->tx_ring = NULL;
1165 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1166 }
1167 }
1168
1169 /*
1170 * Must not be invoked with interrupt sources disabled and
1171 * the hardware shutdown down. Can sleep.
1172 */
1173 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1174 {
1175 int size;
1176
1177 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1178 bp->rx_buffers = kzalloc(size, gfp);
1179 if (!bp->rx_buffers)
1180 goto out_err;
1181
1182 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1183 bp->tx_buffers = kzalloc(size, gfp);
1184 if (!bp->tx_buffers)
1185 goto out_err;
1186
1187 size = DMA_TABLE_BYTES;
1188 bp->rx_ring = dma_alloc_coherent(bp->sdev->dev, size, &bp->rx_ring_dma, gfp);
1189 if (!bp->rx_ring) {
1190 /* Allocation may have failed due to pci_alloc_consistent
1191 insisting on use of GFP_DMA, which is more restrictive
1192 than necessary... */
1193 struct dma_desc *rx_ring;
1194 dma_addr_t rx_ring_dma;
1195
1196 rx_ring = kzalloc(size, gfp);
1197 if (!rx_ring)
1198 goto out_err;
1199
1200 rx_ring_dma = dma_map_single(bp->sdev->dev, rx_ring,
1201 DMA_TABLE_BYTES,
1202 DMA_BIDIRECTIONAL);
1203
1204 if (dma_mapping_error(rx_ring_dma) ||
1205 rx_ring_dma + size > DMA_30BIT_MASK) {
1206 kfree(rx_ring);
1207 goto out_err;
1208 }
1209
1210 bp->rx_ring = rx_ring;
1211 bp->rx_ring_dma = rx_ring_dma;
1212 bp->flags |= B44_FLAG_RX_RING_HACK;
1213 }
1214
1215 bp->tx_ring = dma_alloc_coherent(bp->sdev->dev, size, &bp->tx_ring_dma, gfp);
1216 if (!bp->tx_ring) {
1217 /* Allocation may have failed due to dma_alloc_coherent
1218 insisting on use of GFP_DMA, which is more restrictive
1219 than necessary... */
1220 struct dma_desc *tx_ring;
1221 dma_addr_t tx_ring_dma;
1222
1223 tx_ring = kzalloc(size, gfp);
1224 if (!tx_ring)
1225 goto out_err;
1226
1227 tx_ring_dma = dma_map_single(bp->sdev->dev, tx_ring,
1228 DMA_TABLE_BYTES,
1229 DMA_TO_DEVICE);
1230
1231 if (dma_mapping_error(tx_ring_dma) ||
1232 tx_ring_dma + size > DMA_30BIT_MASK) {
1233 kfree(tx_ring);
1234 goto out_err;
1235 }
1236
1237 bp->tx_ring = tx_ring;
1238 bp->tx_ring_dma = tx_ring_dma;
1239 bp->flags |= B44_FLAG_TX_RING_HACK;
1240 }
1241
1242 return 0;
1243
1244 out_err:
1245 b44_free_consistent(bp);
1246 return -ENOMEM;
1247 }
1248
1249 /* bp->lock is held. */
1250 static void b44_clear_stats(struct b44 *bp)
1251 {
1252 unsigned long reg;
1253
1254 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1255 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1256 br32(bp, reg);
1257 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1258 br32(bp, reg);
1259 }
1260
1261 /* bp->lock is held. */
1262 static void b44_chip_reset(struct b44 *bp)
1263 {
1264 struct ssb_device *sdev = bp->sdev;
1265
1266 if (ssb_device_is_enabled(bp->sdev)) {
1267 bw32(bp, B44_RCV_LAZY, 0);
1268 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1269 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1270 bw32(bp, B44_DMATX_CTRL, 0);
1271 bp->tx_prod = bp->tx_cons = 0;
1272 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1273 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1274 100, 0);
1275 }
1276 bw32(bp, B44_DMARX_CTRL, 0);
1277 bp->rx_prod = bp->rx_cons = 0;
1278 } else
1279 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1280
1281 ssb_device_enable(bp->sdev, 0);
1282 b44_clear_stats(bp);
1283
1284 switch (sdev->bus->bustype) {
1285 case SSB_BUSTYPE_SSB:
1286 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1287 (((ssb_clockspeed(sdev->bus) + (B44_MDC_RATIO / 2)) / B44_MDC_RATIO)
1288 & MDIO_CTRL_MAXF_MASK)));
1289 break;
1290 case SSB_BUSTYPE_PCI:
1291 case SSB_BUSTYPE_PCMCIA:
1292 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1293 (0x0d & MDIO_CTRL_MAXF_MASK)));
1294 break;
1295 }
1296
1297 br32(bp, B44_MDIO_CTRL);
1298
1299 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1300 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1301 br32(bp, B44_ENET_CTRL);
1302 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1303 } else {
1304 u32 val = br32(bp, B44_DEVCTRL);
1305
1306 if (val & DEVCTRL_EPR) {
1307 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1308 br32(bp, B44_DEVCTRL);
1309 udelay(100);
1310 }
1311 bp->flags |= B44_FLAG_INTERNAL_PHY;
1312 }
1313 }
1314
1315 /* bp->lock is held. */
1316 static void b44_halt(struct b44 *bp)
1317 {
1318 b44_disable_ints(bp);
1319 b44_chip_reset(bp);
1320 }
1321
1322 /* bp->lock is held. */
1323 static void __b44_set_mac_addr(struct b44 *bp)
1324 {
1325 bw32(bp, B44_CAM_CTRL, 0);
1326 if (!(bp->dev->flags & IFF_PROMISC)) {
1327 u32 val;
1328
1329 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1330 val = br32(bp, B44_CAM_CTRL);
1331 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1332 }
1333 }
1334
1335 static int b44_set_mac_addr(struct net_device *dev, void *p)
1336 {
1337 struct b44 *bp = netdev_priv(dev);
1338 struct sockaddr *addr = p;
1339 u32 val;
1340
1341 if (netif_running(dev))
1342 return -EBUSY;
1343
1344 if (!is_valid_ether_addr(addr->sa_data))
1345 return -EINVAL;
1346
1347 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1348
1349 spin_lock_irq(&bp->lock);
1350
1351 val = br32(bp, B44_RXCONFIG);
1352 if (!(val & RXCONFIG_CAM_ABSENT))
1353 __b44_set_mac_addr(bp);
1354
1355 spin_unlock_irq(&bp->lock);
1356
1357 return 0;
1358 }
1359
1360 /* Called at device open time to get the chip ready for
1361 * packet processing. Invoked with bp->lock held.
1362 */
1363 static void __b44_set_rx_mode(struct net_device *);
1364 static void b44_init_hw(struct b44 *bp, int reset_kind)
1365 {
1366 u32 val;
1367
1368 b44_chip_reset(bp);
1369 if (reset_kind == B44_FULL_RESET) {
1370 b44_phy_reset(bp);
1371 b44_setup_phy(bp);
1372 }
1373
1374 /* Enable CRC32, set proper LED modes and power on PHY */
1375 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1376 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1377
1378 /* This sets the MAC address too. */
1379 __b44_set_rx_mode(bp->dev);
1380
1381 /* MTU + eth header + possible VLAN tag + struct rx_header */
1382 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1383 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1384
1385 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1386 if (reset_kind == B44_PARTIAL_RESET) {
1387 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1388 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1389 } else {
1390 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1391 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1392 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1393 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1394 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1395
1396 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1397 bp->rx_prod = bp->rx_pending;
1398
1399 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1400 }
1401
1402 val = br32(bp, B44_ENET_CTRL);
1403 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1404 }
1405
1406 static int b44_open(struct net_device *dev)
1407 {
1408 struct b44 *bp = netdev_priv(dev);
1409 int err;
1410
1411 err = b44_alloc_consistent(bp, GFP_KERNEL);
1412 if (err)
1413 goto out;
1414
1415 napi_enable(&bp->napi);
1416
1417 b44_init_rings(bp);
1418 b44_init_hw(bp, B44_FULL_RESET);
1419
1420 b44_check_phy(bp);
1421
1422 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1423 if (unlikely(err < 0)) {
1424 napi_disable(&bp->napi);
1425 b44_chip_reset(bp);
1426 b44_free_rings(bp);
1427 b44_free_consistent(bp);
1428 goto out;
1429 }
1430
1431 init_timer(&bp->timer);
1432 bp->timer.expires = jiffies + HZ;
1433 bp->timer.data = (unsigned long) bp;
1434 bp->timer.function = b44_timer;
1435 add_timer(&bp->timer);
1436
1437 b44_enable_ints(bp);
1438 netif_start_queue(dev);
1439 out:
1440 return err;
1441 }
1442
1443 #ifdef CONFIG_NET_POLL_CONTROLLER
1444 /*
1445 * Polling receive - used by netconsole and other diagnostic tools
1446 * to allow network i/o with interrupts disabled.
1447 */
1448 static void b44_poll_controller(struct net_device *dev)
1449 {
1450 disable_irq(dev->irq);
1451 b44_interrupt(dev->irq, dev);
1452 enable_irq(dev->irq);
1453 }
1454 #endif
1455
1456 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1457 {
1458 u32 i;
1459 u32 *pattern = (u32 *) pp;
1460
1461 for (i = 0; i < bytes; i += sizeof(u32)) {
1462 bw32(bp, B44_FILT_ADDR, table_offset + i);
1463 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1464 }
1465 }
1466
1467 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1468 {
1469 int magicsync = 6;
1470 int k, j, len = offset;
1471 int ethaddr_bytes = ETH_ALEN;
1472
1473 memset(ppattern + offset, 0xff, magicsync);
1474 for (j = 0; j < magicsync; j++)
1475 set_bit(len++, (unsigned long *) pmask);
1476
1477 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1478 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1479 ethaddr_bytes = ETH_ALEN;
1480 else
1481 ethaddr_bytes = B44_PATTERN_SIZE - len;
1482 if (ethaddr_bytes <=0)
1483 break;
1484 for (k = 0; k< ethaddr_bytes; k++) {
1485 ppattern[offset + magicsync +
1486 (j * ETH_ALEN) + k] = macaddr[k];
1487 len++;
1488 set_bit(len, (unsigned long *) pmask);
1489 }
1490 }
1491 return len - 1;
1492 }
1493
1494 /* Setup magic packet patterns in the b44 WOL
1495 * pattern matching filter.
1496 */
1497 static void b44_setup_pseudo_magicp(struct b44 *bp)
1498 {
1499
1500 u32 val;
1501 int plen0, plen1, plen2;
1502 u8 *pwol_pattern;
1503 u8 pwol_mask[B44_PMASK_SIZE];
1504
1505 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1506 if (!pwol_pattern) {
1507 printk(KERN_ERR PFX "Memory not available for WOL\n");
1508 return;
1509 }
1510
1511 /* Ipv4 magic packet pattern - pattern 0.*/
1512 memset(pwol_mask, 0, B44_PMASK_SIZE);
1513 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1514 B44_ETHIPV4UDP_HLEN);
1515
1516 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1517 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1518
1519 /* Raw ethernet II magic packet pattern - pattern 1 */
1520 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1521 memset(pwol_mask, 0, B44_PMASK_SIZE);
1522 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1523 ETH_HLEN);
1524
1525 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1526 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1527 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1528 B44_PMASK_BASE + B44_PMASK_SIZE);
1529
1530 /* Ipv6 magic packet pattern - pattern 2 */
1531 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1532 memset(pwol_mask, 0, B44_PMASK_SIZE);
1533 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1534 B44_ETHIPV6UDP_HLEN);
1535
1536 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1537 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1538 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1539 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1540
1541 kfree(pwol_pattern);
1542
1543 /* set these pattern's lengths: one less than each real length */
1544 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1545 bw32(bp, B44_WKUP_LEN, val);
1546
1547 /* enable wakeup pattern matching */
1548 val = br32(bp, B44_DEVCTRL);
1549 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1550
1551 }
1552
1553 #ifdef CONFIG_B44_PCI
1554 static void b44_setup_wol_pci(struct b44 *bp)
1555 {
1556 u16 val;
1557
1558 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1559 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1560 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1561 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1562 }
1563 }
1564 #else
1565 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1566 #endif /* CONFIG_B44_PCI */
1567
1568 static void b44_setup_wol(struct b44 *bp)
1569 {
1570 u32 val;
1571
1572 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1573
1574 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1575
1576 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1577
1578 val = bp->dev->dev_addr[2] << 24 |
1579 bp->dev->dev_addr[3] << 16 |
1580 bp->dev->dev_addr[4] << 8 |
1581 bp->dev->dev_addr[5];
1582 bw32(bp, B44_ADDR_LO, val);
1583
1584 val = bp->dev->dev_addr[0] << 8 |
1585 bp->dev->dev_addr[1];
1586 bw32(bp, B44_ADDR_HI, val);
1587
1588 val = br32(bp, B44_DEVCTRL);
1589 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1590
1591 } else {
1592 b44_setup_pseudo_magicp(bp);
1593 }
1594 b44_setup_wol_pci(bp);
1595 }
1596
1597 static int b44_close(struct net_device *dev)
1598 {
1599 struct b44 *bp = netdev_priv(dev);
1600
1601 netif_stop_queue(dev);
1602
1603 napi_disable(&bp->napi);
1604
1605 del_timer_sync(&bp->timer);
1606
1607 spin_lock_irq(&bp->lock);
1608
1609 b44_halt(bp);
1610 b44_free_rings(bp);
1611 netif_carrier_off(dev);
1612
1613 spin_unlock_irq(&bp->lock);
1614
1615 free_irq(dev->irq, dev);
1616
1617 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1618 b44_init_hw(bp, B44_PARTIAL_RESET);
1619 b44_setup_wol(bp);
1620 }
1621
1622 b44_free_consistent(bp);
1623
1624 return 0;
1625 }
1626
1627 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1628 {
1629 struct b44 *bp = netdev_priv(dev);
1630 struct net_device_stats *nstat = &bp->stats;
1631 struct b44_hw_stats *hwstat = &bp->hw_stats;
1632
1633 /* Convert HW stats into netdevice stats. */
1634 nstat->rx_packets = hwstat->rx_pkts;
1635 nstat->tx_packets = hwstat->tx_pkts;
1636 nstat->rx_bytes = hwstat->rx_octets;
1637 nstat->tx_bytes = hwstat->tx_octets;
1638 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1639 hwstat->tx_oversize_pkts +
1640 hwstat->tx_underruns +
1641 hwstat->tx_excessive_cols +
1642 hwstat->tx_late_cols);
1643 nstat->multicast = hwstat->tx_multicast_pkts;
1644 nstat->collisions = hwstat->tx_total_cols;
1645
1646 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1647 hwstat->rx_undersize);
1648 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1649 nstat->rx_frame_errors = hwstat->rx_align_errs;
1650 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1651 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1652 hwstat->rx_oversize_pkts +
1653 hwstat->rx_missed_pkts +
1654 hwstat->rx_crc_align_errs +
1655 hwstat->rx_undersize +
1656 hwstat->rx_crc_errs +
1657 hwstat->rx_align_errs +
1658 hwstat->rx_symbol_errs);
1659
1660 nstat->tx_aborted_errors = hwstat->tx_underruns;
1661 #if 0
1662 /* Carrier lost counter seems to be broken for some devices */
1663 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1664 #endif
1665
1666 return nstat;
1667 }
1668
1669 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1670 {
1671 struct dev_mc_list *mclist;
1672 int i, num_ents;
1673
1674 num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1675 mclist = dev->mc_list;
1676 for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1677 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1678 }
1679 return i+1;
1680 }
1681
1682 static void __b44_set_rx_mode(struct net_device *dev)
1683 {
1684 struct b44 *bp = netdev_priv(dev);
1685 u32 val;
1686
1687 val = br32(bp, B44_RXCONFIG);
1688 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1689 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1690 val |= RXCONFIG_PROMISC;
1691 bw32(bp, B44_RXCONFIG, val);
1692 } else {
1693 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1694 int i = 1;
1695
1696 __b44_set_mac_addr(bp);
1697
1698 if ((dev->flags & IFF_ALLMULTI) ||
1699 (dev->mc_count > B44_MCAST_TABLE_SIZE))
1700 val |= RXCONFIG_ALLMULTI;
1701 else
1702 i = __b44_load_mcast(bp, dev);
1703
1704 for (; i < 64; i++)
1705 __b44_cam_write(bp, zero, i);
1706
1707 bw32(bp, B44_RXCONFIG, val);
1708 val = br32(bp, B44_CAM_CTRL);
1709 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1710 }
1711 }
1712
1713 static void b44_set_rx_mode(struct net_device *dev)
1714 {
1715 struct b44 *bp = netdev_priv(dev);
1716
1717 spin_lock_irq(&bp->lock);
1718 __b44_set_rx_mode(dev);
1719 spin_unlock_irq(&bp->lock);
1720 }
1721
1722 static u32 b44_get_msglevel(struct net_device *dev)
1723 {
1724 struct b44 *bp = netdev_priv(dev);
1725 return bp->msg_enable;
1726 }
1727
1728 static void b44_set_msglevel(struct net_device *dev, u32 value)
1729 {
1730 struct b44 *bp = netdev_priv(dev);
1731 bp->msg_enable = value;
1732 }
1733
1734 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1735 {
1736 struct b44 *bp = netdev_priv(dev);
1737 struct ssb_bus *bus = bp->sdev->bus;
1738
1739 strncpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1740 strncpy(info->version, DRV_MODULE_VERSION, sizeof(info->driver));
1741 switch (bus->bustype) {
1742 case SSB_BUSTYPE_PCI:
1743 strncpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1744 break;
1745 case SSB_BUSTYPE_PCMCIA:
1746 case SSB_BUSTYPE_SSB:
1747 strncpy(info->bus_info, "SSB", sizeof(info->bus_info));
1748 break;
1749 }
1750 }
1751
1752 static int b44_nway_reset(struct net_device *dev)
1753 {
1754 struct b44 *bp = netdev_priv(dev);
1755 u32 bmcr;
1756 int r;
1757
1758 spin_lock_irq(&bp->lock);
1759 b44_readphy(bp, MII_BMCR, &bmcr);
1760 b44_readphy(bp, MII_BMCR, &bmcr);
1761 r = -EINVAL;
1762 if (bmcr & BMCR_ANENABLE) {
1763 b44_writephy(bp, MII_BMCR,
1764 bmcr | BMCR_ANRESTART);
1765 r = 0;
1766 }
1767 spin_unlock_irq(&bp->lock);
1768
1769 return r;
1770 }
1771
1772 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1773 {
1774 struct b44 *bp = netdev_priv(dev);
1775
1776 cmd->supported = (SUPPORTED_Autoneg);
1777 cmd->supported |= (SUPPORTED_100baseT_Half |
1778 SUPPORTED_100baseT_Full |
1779 SUPPORTED_10baseT_Half |
1780 SUPPORTED_10baseT_Full |
1781 SUPPORTED_MII);
1782
1783 cmd->advertising = 0;
1784 if (bp->flags & B44_FLAG_ADV_10HALF)
1785 cmd->advertising |= ADVERTISED_10baseT_Half;
1786 if (bp->flags & B44_FLAG_ADV_10FULL)
1787 cmd->advertising |= ADVERTISED_10baseT_Full;
1788 if (bp->flags & B44_FLAG_ADV_100HALF)
1789 cmd->advertising |= ADVERTISED_100baseT_Half;
1790 if (bp->flags & B44_FLAG_ADV_100FULL)
1791 cmd->advertising |= ADVERTISED_100baseT_Full;
1792 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1793 cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1794 SPEED_100 : SPEED_10;
1795 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1796 DUPLEX_FULL : DUPLEX_HALF;
1797 cmd->port = 0;
1798 cmd->phy_address = bp->phy_addr;
1799 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1800 XCVR_INTERNAL : XCVR_EXTERNAL;
1801 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1802 AUTONEG_DISABLE : AUTONEG_ENABLE;
1803 if (cmd->autoneg == AUTONEG_ENABLE)
1804 cmd->advertising |= ADVERTISED_Autoneg;
1805 if (!netif_running(dev)){
1806 cmd->speed = 0;
1807 cmd->duplex = 0xff;
1808 }
1809 cmd->maxtxpkt = 0;
1810 cmd->maxrxpkt = 0;
1811 return 0;
1812 }
1813
1814 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1815 {
1816 struct b44 *bp = netdev_priv(dev);
1817
1818 /* We do not support gigabit. */
1819 if (cmd->autoneg == AUTONEG_ENABLE) {
1820 if (cmd->advertising &
1821 (ADVERTISED_1000baseT_Half |
1822 ADVERTISED_1000baseT_Full))
1823 return -EINVAL;
1824 } else if ((cmd->speed != SPEED_100 &&
1825 cmd->speed != SPEED_10) ||
1826 (cmd->duplex != DUPLEX_HALF &&
1827 cmd->duplex != DUPLEX_FULL)) {
1828 return -EINVAL;
1829 }
1830
1831 spin_lock_irq(&bp->lock);
1832
1833 if (cmd->autoneg == AUTONEG_ENABLE) {
1834 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1835 B44_FLAG_100_BASE_T |
1836 B44_FLAG_FULL_DUPLEX |
1837 B44_FLAG_ADV_10HALF |
1838 B44_FLAG_ADV_10FULL |
1839 B44_FLAG_ADV_100HALF |
1840 B44_FLAG_ADV_100FULL);
1841 if (cmd->advertising == 0) {
1842 bp->flags |= (B44_FLAG_ADV_10HALF |
1843 B44_FLAG_ADV_10FULL |
1844 B44_FLAG_ADV_100HALF |
1845 B44_FLAG_ADV_100FULL);
1846 } else {
1847 if (cmd->advertising & ADVERTISED_10baseT_Half)
1848 bp->flags |= B44_FLAG_ADV_10HALF;
1849 if (cmd->advertising & ADVERTISED_10baseT_Full)
1850 bp->flags |= B44_FLAG_ADV_10FULL;
1851 if (cmd->advertising & ADVERTISED_100baseT_Half)
1852 bp->flags |= B44_FLAG_ADV_100HALF;
1853 if (cmd->advertising & ADVERTISED_100baseT_Full)
1854 bp->flags |= B44_FLAG_ADV_100FULL;
1855 }
1856 } else {
1857 bp->flags |= B44_FLAG_FORCE_LINK;
1858 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1859 if (cmd->speed == SPEED_100)
1860 bp->flags |= B44_FLAG_100_BASE_T;
1861 if (cmd->duplex == DUPLEX_FULL)
1862 bp->flags |= B44_FLAG_FULL_DUPLEX;
1863 }
1864
1865 if (netif_running(dev))
1866 b44_setup_phy(bp);
1867
1868 spin_unlock_irq(&bp->lock);
1869
1870 return 0;
1871 }
1872
1873 static void b44_get_ringparam(struct net_device *dev,
1874 struct ethtool_ringparam *ering)
1875 {
1876 struct b44 *bp = netdev_priv(dev);
1877
1878 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1879 ering->rx_pending = bp->rx_pending;
1880
1881 /* XXX ethtool lacks a tx_max_pending, oops... */
1882 }
1883
1884 static int b44_set_ringparam(struct net_device *dev,
1885 struct ethtool_ringparam *ering)
1886 {
1887 struct b44 *bp = netdev_priv(dev);
1888
1889 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1890 (ering->rx_mini_pending != 0) ||
1891 (ering->rx_jumbo_pending != 0) ||
1892 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1893 return -EINVAL;
1894
1895 spin_lock_irq(&bp->lock);
1896
1897 bp->rx_pending = ering->rx_pending;
1898 bp->tx_pending = ering->tx_pending;
1899
1900 b44_halt(bp);
1901 b44_init_rings(bp);
1902 b44_init_hw(bp, B44_FULL_RESET);
1903 netif_wake_queue(bp->dev);
1904 spin_unlock_irq(&bp->lock);
1905
1906 b44_enable_ints(bp);
1907
1908 return 0;
1909 }
1910
1911 static void b44_get_pauseparam(struct net_device *dev,
1912 struct ethtool_pauseparam *epause)
1913 {
1914 struct b44 *bp = netdev_priv(dev);
1915
1916 epause->autoneg =
1917 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1918 epause->rx_pause =
1919 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1920 epause->tx_pause =
1921 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1922 }
1923
1924 static int b44_set_pauseparam(struct net_device *dev,
1925 struct ethtool_pauseparam *epause)
1926 {
1927 struct b44 *bp = netdev_priv(dev);
1928
1929 spin_lock_irq(&bp->lock);
1930 if (epause->autoneg)
1931 bp->flags |= B44_FLAG_PAUSE_AUTO;
1932 else
1933 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1934 if (epause->rx_pause)
1935 bp->flags |= B44_FLAG_RX_PAUSE;
1936 else
1937 bp->flags &= ~B44_FLAG_RX_PAUSE;
1938 if (epause->tx_pause)
1939 bp->flags |= B44_FLAG_TX_PAUSE;
1940 else
1941 bp->flags &= ~B44_FLAG_TX_PAUSE;
1942 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1943 b44_halt(bp);
1944 b44_init_rings(bp);
1945 b44_init_hw(bp, B44_FULL_RESET);
1946 } else {
1947 __b44_set_flow_ctrl(bp, bp->flags);
1948 }
1949 spin_unlock_irq(&bp->lock);
1950
1951 b44_enable_ints(bp);
1952
1953 return 0;
1954 }
1955
1956 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1957 {
1958 switch(stringset) {
1959 case ETH_SS_STATS:
1960 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1961 break;
1962 }
1963 }
1964
1965 static int b44_get_sset_count(struct net_device *dev, int sset)
1966 {
1967 switch (sset) {
1968 case ETH_SS_STATS:
1969 return ARRAY_SIZE(b44_gstrings);
1970 default:
1971 return -EOPNOTSUPP;
1972 }
1973 }
1974
1975 static void b44_get_ethtool_stats(struct net_device *dev,
1976 struct ethtool_stats *stats, u64 *data)
1977 {
1978 struct b44 *bp = netdev_priv(dev);
1979 u32 *val = &bp->hw_stats.tx_good_octets;
1980 u32 i;
1981
1982 spin_lock_irq(&bp->lock);
1983
1984 b44_stats_update(bp);
1985
1986 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
1987 *data++ = *val++;
1988
1989 spin_unlock_irq(&bp->lock);
1990 }
1991
1992 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1993 {
1994 struct b44 *bp = netdev_priv(dev);
1995
1996 wol->supported = WAKE_MAGIC;
1997 if (bp->flags & B44_FLAG_WOL_ENABLE)
1998 wol->wolopts = WAKE_MAGIC;
1999 else
2000 wol->wolopts = 0;
2001 memset(&wol->sopass, 0, sizeof(wol->sopass));
2002 }
2003
2004 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2005 {
2006 struct b44 *bp = netdev_priv(dev);
2007
2008 spin_lock_irq(&bp->lock);
2009 if (wol->wolopts & WAKE_MAGIC)
2010 bp->flags |= B44_FLAG_WOL_ENABLE;
2011 else
2012 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2013 spin_unlock_irq(&bp->lock);
2014
2015 return 0;
2016 }
2017
2018 static const struct ethtool_ops b44_ethtool_ops = {
2019 .get_drvinfo = b44_get_drvinfo,
2020 .get_settings = b44_get_settings,
2021 .set_settings = b44_set_settings,
2022 .nway_reset = b44_nway_reset,
2023 .get_link = ethtool_op_get_link,
2024 .get_wol = b44_get_wol,
2025 .set_wol = b44_set_wol,
2026 .get_ringparam = b44_get_ringparam,
2027 .set_ringparam = b44_set_ringparam,
2028 .get_pauseparam = b44_get_pauseparam,
2029 .set_pauseparam = b44_set_pauseparam,
2030 .get_msglevel = b44_get_msglevel,
2031 .set_msglevel = b44_set_msglevel,
2032 .get_strings = b44_get_strings,
2033 .get_sset_count = b44_get_sset_count,
2034 .get_ethtool_stats = b44_get_ethtool_stats,
2035 };
2036
2037 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2038 {
2039 struct mii_ioctl_data *data = if_mii(ifr);
2040 struct b44 *bp = netdev_priv(dev);
2041 int err = -EINVAL;
2042
2043 if (!netif_running(dev))
2044 goto out;
2045
2046 spin_lock_irq(&bp->lock);
2047 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2048 spin_unlock_irq(&bp->lock);
2049 out:
2050 return err;
2051 }
2052
2053 static int __devinit b44_get_invariants(struct b44 *bp)
2054 {
2055 struct ssb_device *sdev = bp->sdev;
2056 int err = 0;
2057 u8 *addr;
2058
2059 bp->dma_offset = ssb_dma_translation(sdev);
2060
2061 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2062 instance > 1) {
2063 addr = sdev->bus->sprom.r1.et1mac;
2064 bp->phy_addr = sdev->bus->sprom.r1.et1phyaddr;
2065 } else {
2066 addr = sdev->bus->sprom.r1.et0mac;
2067 bp->phy_addr = sdev->bus->sprom.r1.et0phyaddr;
2068 }
2069 memcpy(bp->dev->dev_addr, addr, 6);
2070
2071 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2072 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2073 return -EINVAL;
2074 }
2075
2076 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2077
2078 bp->imask = IMASK_DEF;
2079
2080 /* XXX - really required?
2081 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2082 */
2083
2084 if (bp->sdev->id.revision >= 7)
2085 bp->flags |= B44_FLAG_B0_ANDLATER;
2086
2087 return err;
2088 }
2089
2090 static int __devinit b44_init_one(struct ssb_device *sdev,
2091 const struct ssb_device_id *ent)
2092 {
2093 static int b44_version_printed = 0;
2094 struct net_device *dev;
2095 struct b44 *bp;
2096 int err;
2097 DECLARE_MAC_BUF(mac);
2098
2099 instance++;
2100
2101 if (b44_version_printed++ == 0)
2102 printk(KERN_INFO "%s", version);
2103
2104
2105 dev = alloc_etherdev(sizeof(*bp));
2106 if (!dev) {
2107 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2108 err = -ENOMEM;
2109 goto out;
2110 }
2111
2112 SET_NETDEV_DEV(dev, sdev->dev);
2113
2114 /* No interesting netdevice features in this card... */
2115 dev->features |= 0;
2116
2117 bp = netdev_priv(dev);
2118 bp->sdev = sdev;
2119 bp->dev = dev;
2120
2121 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2122
2123 spin_lock_init(&bp->lock);
2124
2125 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2126 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2127
2128 dev->open = b44_open;
2129 dev->stop = b44_close;
2130 dev->hard_start_xmit = b44_start_xmit;
2131 dev->get_stats = b44_get_stats;
2132 dev->set_multicast_list = b44_set_rx_mode;
2133 dev->set_mac_address = b44_set_mac_addr;
2134 dev->do_ioctl = b44_ioctl;
2135 dev->tx_timeout = b44_tx_timeout;
2136 netif_napi_add(dev, &bp->napi, b44_poll, 64);
2137 dev->watchdog_timeo = B44_TX_TIMEOUT;
2138 #ifdef CONFIG_NET_POLL_CONTROLLER
2139 dev->poll_controller = b44_poll_controller;
2140 #endif
2141 dev->change_mtu = b44_change_mtu;
2142 dev->irq = sdev->irq;
2143 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2144
2145 netif_carrier_off(dev);
2146
2147 err = ssb_bus_powerup(sdev->bus, 0);
2148 if (err) {
2149 dev_err(sdev->dev,
2150 "Failed to powerup the bus\n");
2151 goto err_out_free_dev;
2152 }
2153 err = ssb_dma_set_mask(sdev, DMA_30BIT_MASK);
2154 if (err) {
2155 dev_err(sdev->dev,
2156 "Required 30BIT DMA mask unsupported by the system.\n");
2157 goto err_out_powerdown;
2158 }
2159 err = b44_get_invariants(bp);
2160 if (err) {
2161 dev_err(sdev->dev,
2162 "Problem fetching invariants of chip, aborting.\n");
2163 goto err_out_powerdown;
2164 }
2165
2166 bp->mii_if.dev = dev;
2167 bp->mii_if.mdio_read = b44_mii_read;
2168 bp->mii_if.mdio_write = b44_mii_write;
2169 bp->mii_if.phy_id = bp->phy_addr;
2170 bp->mii_if.phy_id_mask = 0x1f;
2171 bp->mii_if.reg_num_mask = 0x1f;
2172
2173 /* By default, advertise all speed/duplex settings. */
2174 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2175 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2176
2177 /* By default, auto-negotiate PAUSE. */
2178 bp->flags |= B44_FLAG_PAUSE_AUTO;
2179
2180 err = register_netdev(dev);
2181 if (err) {
2182 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2183 goto err_out_powerdown;
2184 }
2185
2186 ssb_set_drvdata(sdev, dev);
2187
2188 /* Chip reset provides power to the b44 MAC & PCI cores, which
2189 * is necessary for MAC register access.
2190 */
2191 b44_chip_reset(bp);
2192
2193 printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %s\n",
2194 dev->name, print_mac(mac, dev->dev_addr));
2195
2196 return 0;
2197
2198 err_out_powerdown:
2199 ssb_bus_may_powerdown(sdev->bus);
2200
2201 err_out_free_dev:
2202 free_netdev(dev);
2203
2204 out:
2205 return err;
2206 }
2207
2208 static void __devexit b44_remove_one(struct ssb_device *sdev)
2209 {
2210 struct net_device *dev = ssb_get_drvdata(sdev);
2211
2212 unregister_netdev(dev);
2213 ssb_bus_may_powerdown(sdev->bus);
2214 free_netdev(dev);
2215 ssb_set_drvdata(sdev, NULL);
2216 }
2217
2218 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2219 {
2220 struct net_device *dev = ssb_get_drvdata(sdev);
2221 struct b44 *bp = netdev_priv(dev);
2222
2223 if (!netif_running(dev))
2224 return 0;
2225
2226 del_timer_sync(&bp->timer);
2227
2228 spin_lock_irq(&bp->lock);
2229
2230 b44_halt(bp);
2231 netif_carrier_off(bp->dev);
2232 netif_device_detach(bp->dev);
2233 b44_free_rings(bp);
2234
2235 spin_unlock_irq(&bp->lock);
2236
2237 free_irq(dev->irq, dev);
2238 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2239 b44_init_hw(bp, B44_PARTIAL_RESET);
2240 b44_setup_wol(bp);
2241 }
2242
2243 return 0;
2244 }
2245
2246 static int b44_resume(struct ssb_device *sdev)
2247 {
2248 struct net_device *dev = ssb_get_drvdata(sdev);
2249 struct b44 *bp = netdev_priv(dev);
2250 int rc = 0;
2251
2252 rc = ssb_bus_powerup(sdev->bus, 0);
2253 if (rc) {
2254 dev_err(sdev->dev,
2255 "Failed to powerup the bus\n");
2256 return rc;
2257 }
2258
2259 if (!netif_running(dev))
2260 return 0;
2261
2262 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2263 if (rc) {
2264 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2265 return rc;
2266 }
2267
2268 spin_lock_irq(&bp->lock);
2269
2270 b44_init_rings(bp);
2271 b44_init_hw(bp, B44_FULL_RESET);
2272 netif_device_attach(bp->dev);
2273 spin_unlock_irq(&bp->lock);
2274
2275 b44_enable_ints(bp);
2276 netif_wake_queue(dev);
2277
2278 mod_timer(&bp->timer, jiffies + 1);
2279
2280 return 0;
2281 }
2282
2283 static struct ssb_driver b44_ssb_driver = {
2284 .name = DRV_MODULE_NAME,
2285 .id_table = b44_ssb_tbl,
2286 .probe = b44_init_one,
2287 .remove = __devexit_p(b44_remove_one),
2288 .suspend = b44_suspend,
2289 .resume = b44_resume,
2290 };
2291
2292 static inline int b44_pci_init(void)
2293 {
2294 int err = 0;
2295 #ifdef CONFIG_B44_PCI
2296 err = ssb_pcihost_register(&b44_pci_driver);
2297 #endif
2298 return err;
2299 }
2300
2301 static inline void b44_pci_exit(void)
2302 {
2303 #ifdef CONFIG_B44_PCI
2304 ssb_pcihost_unregister(&b44_pci_driver);
2305 #endif
2306 }
2307
2308 static int __init b44_init(void)
2309 {
2310 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2311 int err;
2312
2313 /* Setup paramaters for syncing RX/TX DMA descriptors */
2314 dma_desc_align_mask = ~(dma_desc_align_size - 1);
2315 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2316
2317 err = b44_pci_init();
2318 if (err)
2319 return err;
2320 err = ssb_driver_register(&b44_ssb_driver);
2321 if (err)
2322 b44_pci_exit();
2323 return err;
2324 }
2325
2326 static void __exit b44_cleanup(void)
2327 {
2328 ssb_driver_unregister(&b44_ssb_driver);
2329 b44_pci_exit();
2330 }
2331
2332 module_init(b44_init);
2333 module_exit(b44_cleanup);
2334
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