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b43legacy: drop ssb-duplicated workaround for dangling cores
[deliverable/linux.git] / drivers / net / b44.c
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/types.h>
19 #include <linux/netdevice.h>
20 #include <linux/ethtool.h>
21 #include <linux/mii.h>
22 #include <linux/if_ether.h>
23 #include <linux/if_vlan.h>
24 #include <linux/etherdevice.h>
25 #include <linux/pci.h>
26 #include <linux/delay.h>
27 #include <linux/init.h>
28 #include <linux/dma-mapping.h>
29 #include <linux/ssb/ssb.h>
30 #include <linux/slab.h>
31
32 #include <asm/uaccess.h>
33 #include <asm/io.h>
34 #include <asm/irq.h>
35
36
37 #include "b44.h"
38
39 #define DRV_MODULE_NAME "b44"
40 #define DRV_MODULE_VERSION "2.0"
41
42 #define B44_DEF_MSG_ENABLE \
43 (NETIF_MSG_DRV | \
44 NETIF_MSG_PROBE | \
45 NETIF_MSG_LINK | \
46 NETIF_MSG_TIMER | \
47 NETIF_MSG_IFDOWN | \
48 NETIF_MSG_IFUP | \
49 NETIF_MSG_RX_ERR | \
50 NETIF_MSG_TX_ERR)
51
52 /* length of time before we decide the hardware is borked,
53 * and dev->tx_timeout() should be called to fix the problem
54 */
55 #define B44_TX_TIMEOUT (5 * HZ)
56
57 /* hardware minimum and maximum for a single frame's data payload */
58 #define B44_MIN_MTU 60
59 #define B44_MAX_MTU 1500
60
61 #define B44_RX_RING_SIZE 512
62 #define B44_DEF_RX_RING_PENDING 200
63 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
64 B44_RX_RING_SIZE)
65 #define B44_TX_RING_SIZE 512
66 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
67 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
68 B44_TX_RING_SIZE)
69
70 #define TX_RING_GAP(BP) \
71 (B44_TX_RING_SIZE - (BP)->tx_pending)
72 #define TX_BUFFS_AVAIL(BP) \
73 (((BP)->tx_cons <= (BP)->tx_prod) ? \
74 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
75 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
76 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
77
78 #define RX_PKT_OFFSET (RX_HEADER_LEN + 2)
79 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET)
80
81 /* minimum number of free TX descriptors required to wake up TX process */
82 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
83
84 /* b44 internal pattern match filter info */
85 #define B44_PATTERN_BASE 0x400
86 #define B44_PATTERN_SIZE 0x80
87 #define B44_PMASK_BASE 0x600
88 #define B44_PMASK_SIZE 0x10
89 #define B44_MAX_PATTERNS 16
90 #define B44_ETHIPV6UDP_HLEN 62
91 #define B44_ETHIPV4UDP_HLEN 42
92
93 static char version[] __devinitdata =
94 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION "\n";
95
96 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
97 MODULE_DESCRIPTION("Broadcom 44xx/47xx 10/100 PCI ethernet driver");
98 MODULE_LICENSE("GPL");
99 MODULE_VERSION(DRV_MODULE_VERSION);
100
101 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
102 module_param(b44_debug, int, 0);
103 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
104
105
106 #ifdef CONFIG_B44_PCI
107 static DEFINE_PCI_DEVICE_TABLE(b44_pci_tbl) = {
108 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
109 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
110 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
111 { 0 } /* terminate list with empty entry */
112 };
113 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
114
115 static struct pci_driver b44_pci_driver = {
116 .name = DRV_MODULE_NAME,
117 .id_table = b44_pci_tbl,
118 };
119 #endif /* CONFIG_B44_PCI */
120
121 static const struct ssb_device_id b44_ssb_tbl[] = {
122 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
123 SSB_DEVTABLE_END
124 };
125 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
126
127 static void b44_halt(struct b44 *);
128 static void b44_init_rings(struct b44 *);
129
130 #define B44_FULL_RESET 1
131 #define B44_FULL_RESET_SKIP_PHY 2
132 #define B44_PARTIAL_RESET 3
133 #define B44_CHIP_RESET_FULL 4
134 #define B44_CHIP_RESET_PARTIAL 5
135
136 static void b44_init_hw(struct b44 *, int);
137
138 static int dma_desc_sync_size;
139 static int instance;
140
141 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
142 #define _B44(x...) # x,
143 B44_STAT_REG_DECLARE
144 #undef _B44
145 };
146
147 static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
148 dma_addr_t dma_base,
149 unsigned long offset,
150 enum dma_data_direction dir)
151 {
152 dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
153 dma_desc_sync_size, dir);
154 }
155
156 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
157 dma_addr_t dma_base,
158 unsigned long offset,
159 enum dma_data_direction dir)
160 {
161 dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
162 dma_desc_sync_size, dir);
163 }
164
165 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
166 {
167 return ssb_read32(bp->sdev, reg);
168 }
169
170 static inline void bw32(const struct b44 *bp,
171 unsigned long reg, unsigned long val)
172 {
173 ssb_write32(bp->sdev, reg, val);
174 }
175
176 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
177 u32 bit, unsigned long timeout, const int clear)
178 {
179 unsigned long i;
180
181 for (i = 0; i < timeout; i++) {
182 u32 val = br32(bp, reg);
183
184 if (clear && !(val & bit))
185 break;
186 if (!clear && (val & bit))
187 break;
188 udelay(10);
189 }
190 if (i == timeout) {
191 if (net_ratelimit())
192 netdev_err(bp->dev, "BUG! Timeout waiting for bit %08x of register %lx to %s\n",
193 bit, reg, clear ? "clear" : "set");
194
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 netdev_err(bp->dev, "PHY Reset would not complete\n");
335 err = -ENODEV;
336 }
337 }
338
339 return err;
340 }
341
342 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
343 {
344 u32 val;
345
346 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
347 bp->flags |= pause_flags;
348
349 val = br32(bp, B44_RXCONFIG);
350 if (pause_flags & B44_FLAG_RX_PAUSE)
351 val |= RXCONFIG_FLOW;
352 else
353 val &= ~RXCONFIG_FLOW;
354 bw32(bp, B44_RXCONFIG, val);
355
356 val = br32(bp, B44_MAC_FLOW);
357 if (pause_flags & B44_FLAG_TX_PAUSE)
358 val |= (MAC_FLOW_PAUSE_ENAB |
359 (0xc0 & MAC_FLOW_RX_HI_WATER));
360 else
361 val &= ~MAC_FLOW_PAUSE_ENAB;
362 bw32(bp, B44_MAC_FLOW, val);
363 }
364
365 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
366 {
367 u32 pause_enab = 0;
368
369 /* The driver supports only rx pause by default because
370 the b44 mac tx pause mechanism generates excessive
371 pause frames.
372 Use ethtool to turn on b44 tx pause if necessary.
373 */
374 if ((local & ADVERTISE_PAUSE_CAP) &&
375 (local & ADVERTISE_PAUSE_ASYM)){
376 if ((remote & LPA_PAUSE_ASYM) &&
377 !(remote & LPA_PAUSE_CAP))
378 pause_enab |= B44_FLAG_RX_PAUSE;
379 }
380
381 __b44_set_flow_ctrl(bp, pause_enab);
382 }
383
384 #ifdef CONFIG_BCM47XX
385 #include <asm/mach-bcm47xx/nvram.h>
386 static void b44_wap54g10_workaround(struct b44 *bp)
387 {
388 char buf[20];
389 u32 val;
390 int err;
391
392 /*
393 * workaround for bad hardware design in Linksys WAP54G v1.0
394 * see https://dev.openwrt.org/ticket/146
395 * check and reset bit "isolate"
396 */
397 if (nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
398 return;
399 if (simple_strtoul(buf, NULL, 0) == 2) {
400 err = __b44_readphy(bp, 0, MII_BMCR, &val);
401 if (err)
402 goto error;
403 if (!(val & BMCR_ISOLATE))
404 return;
405 val &= ~BMCR_ISOLATE;
406 err = __b44_writephy(bp, 0, MII_BMCR, val);
407 if (err)
408 goto error;
409 }
410 return;
411 error:
412 pr_warning("PHY: cannot reset MII transceiver isolate bit\n");
413 }
414 #else
415 static inline void b44_wap54g10_workaround(struct b44 *bp)
416 {
417 }
418 #endif
419
420 static int b44_setup_phy(struct b44 *bp)
421 {
422 u32 val;
423 int err;
424
425 b44_wap54g10_workaround(bp);
426
427 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
428 return 0;
429 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
430 goto out;
431 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
432 val & MII_ALEDCTRL_ALLMSK)) != 0)
433 goto out;
434 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
435 goto out;
436 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
437 val | MII_TLEDCTRL_ENABLE)) != 0)
438 goto out;
439
440 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
441 u32 adv = ADVERTISE_CSMA;
442
443 if (bp->flags & B44_FLAG_ADV_10HALF)
444 adv |= ADVERTISE_10HALF;
445 if (bp->flags & B44_FLAG_ADV_10FULL)
446 adv |= ADVERTISE_10FULL;
447 if (bp->flags & B44_FLAG_ADV_100HALF)
448 adv |= ADVERTISE_100HALF;
449 if (bp->flags & B44_FLAG_ADV_100FULL)
450 adv |= ADVERTISE_100FULL;
451
452 if (bp->flags & B44_FLAG_PAUSE_AUTO)
453 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
454
455 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
456 goto out;
457 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
458 BMCR_ANRESTART))) != 0)
459 goto out;
460 } else {
461 u32 bmcr;
462
463 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
464 goto out;
465 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
466 if (bp->flags & B44_FLAG_100_BASE_T)
467 bmcr |= BMCR_SPEED100;
468 if (bp->flags & B44_FLAG_FULL_DUPLEX)
469 bmcr |= BMCR_FULLDPLX;
470 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
471 goto out;
472
473 /* Since we will not be negotiating there is no safe way
474 * to determine if the link partner supports flow control
475 * or not. So just disable it completely in this case.
476 */
477 b44_set_flow_ctrl(bp, 0, 0);
478 }
479
480 out:
481 return err;
482 }
483
484 static void b44_stats_update(struct b44 *bp)
485 {
486 unsigned long reg;
487 u32 *val;
488
489 val = &bp->hw_stats.tx_good_octets;
490 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
491 *val++ += br32(bp, reg);
492 }
493
494 /* Pad */
495 reg += 8*4UL;
496
497 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
498 *val++ += br32(bp, reg);
499 }
500 }
501
502 static void b44_link_report(struct b44 *bp)
503 {
504 if (!netif_carrier_ok(bp->dev)) {
505 netdev_info(bp->dev, "Link is down\n");
506 } else {
507 netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n",
508 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
509 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
510
511 netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n",
512 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
513 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
514 }
515 }
516
517 static void b44_check_phy(struct b44 *bp)
518 {
519 u32 bmsr, aux;
520
521 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
522 bp->flags |= B44_FLAG_100_BASE_T;
523 bp->flags |= B44_FLAG_FULL_DUPLEX;
524 if (!netif_carrier_ok(bp->dev)) {
525 u32 val = br32(bp, B44_TX_CTRL);
526 val |= TX_CTRL_DUPLEX;
527 bw32(bp, B44_TX_CTRL, val);
528 netif_carrier_on(bp->dev);
529 b44_link_report(bp);
530 }
531 return;
532 }
533
534 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
535 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
536 (bmsr != 0xffff)) {
537 if (aux & MII_AUXCTRL_SPEED)
538 bp->flags |= B44_FLAG_100_BASE_T;
539 else
540 bp->flags &= ~B44_FLAG_100_BASE_T;
541 if (aux & MII_AUXCTRL_DUPLEX)
542 bp->flags |= B44_FLAG_FULL_DUPLEX;
543 else
544 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
545
546 if (!netif_carrier_ok(bp->dev) &&
547 (bmsr & BMSR_LSTATUS)) {
548 u32 val = br32(bp, B44_TX_CTRL);
549 u32 local_adv, remote_adv;
550
551 if (bp->flags & B44_FLAG_FULL_DUPLEX)
552 val |= TX_CTRL_DUPLEX;
553 else
554 val &= ~TX_CTRL_DUPLEX;
555 bw32(bp, B44_TX_CTRL, val);
556
557 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
558 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
559 !b44_readphy(bp, MII_LPA, &remote_adv))
560 b44_set_flow_ctrl(bp, local_adv, remote_adv);
561
562 /* Link now up */
563 netif_carrier_on(bp->dev);
564 b44_link_report(bp);
565 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
566 /* Link now down */
567 netif_carrier_off(bp->dev);
568 b44_link_report(bp);
569 }
570
571 if (bmsr & BMSR_RFAULT)
572 netdev_warn(bp->dev, "Remote fault detected in PHY\n");
573 if (bmsr & BMSR_JCD)
574 netdev_warn(bp->dev, "Jabber detected in PHY\n");
575 }
576 }
577
578 static void b44_timer(unsigned long __opaque)
579 {
580 struct b44 *bp = (struct b44 *) __opaque;
581
582 spin_lock_irq(&bp->lock);
583
584 b44_check_phy(bp);
585
586 b44_stats_update(bp);
587
588 spin_unlock_irq(&bp->lock);
589
590 mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
591 }
592
593 static void b44_tx(struct b44 *bp)
594 {
595 u32 cur, cons;
596
597 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
598 cur /= sizeof(struct dma_desc);
599
600 /* XXX needs updating when NETIF_F_SG is supported */
601 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
602 struct ring_info *rp = &bp->tx_buffers[cons];
603 struct sk_buff *skb = rp->skb;
604
605 BUG_ON(skb == NULL);
606
607 dma_unmap_single(bp->sdev->dma_dev,
608 rp->mapping,
609 skb->len,
610 DMA_TO_DEVICE);
611 rp->skb = NULL;
612 dev_kfree_skb_irq(skb);
613 }
614
615 bp->tx_cons = cons;
616 if (netif_queue_stopped(bp->dev) &&
617 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
618 netif_wake_queue(bp->dev);
619
620 bw32(bp, B44_GPTIMER, 0);
621 }
622
623 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
624 * before the DMA address you give it. So we allocate 30 more bytes
625 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
626 * point the chip at 30 bytes past where the rx_header will go.
627 */
628 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
629 {
630 struct dma_desc *dp;
631 struct ring_info *src_map, *map;
632 struct rx_header *rh;
633 struct sk_buff *skb;
634 dma_addr_t mapping;
635 int dest_idx;
636 u32 ctrl;
637
638 src_map = NULL;
639 if (src_idx >= 0)
640 src_map = &bp->rx_buffers[src_idx];
641 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
642 map = &bp->rx_buffers[dest_idx];
643 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
644 if (skb == NULL)
645 return -ENOMEM;
646
647 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
648 RX_PKT_BUF_SZ,
649 DMA_FROM_DEVICE);
650
651 /* Hardware bug work-around, the chip is unable to do PCI DMA
652 to/from anything above 1GB :-( */
653 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
654 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
655 /* Sigh... */
656 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
657 dma_unmap_single(bp->sdev->dma_dev, mapping,
658 RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
659 dev_kfree_skb_any(skb);
660 skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
661 if (skb == NULL)
662 return -ENOMEM;
663 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
664 RX_PKT_BUF_SZ,
665 DMA_FROM_DEVICE);
666 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
667 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
668 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
669 dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
670 dev_kfree_skb_any(skb);
671 return -ENOMEM;
672 }
673 bp->force_copybreak = 1;
674 }
675
676 rh = (struct rx_header *) skb->data;
677
678 rh->len = 0;
679 rh->flags = 0;
680
681 map->skb = skb;
682 map->mapping = mapping;
683
684 if (src_map != NULL)
685 src_map->skb = NULL;
686
687 ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
688 if (dest_idx == (B44_RX_RING_SIZE - 1))
689 ctrl |= DESC_CTRL_EOT;
690
691 dp = &bp->rx_ring[dest_idx];
692 dp->ctrl = cpu_to_le32(ctrl);
693 dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
694
695 if (bp->flags & B44_FLAG_RX_RING_HACK)
696 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
697 dest_idx * sizeof(*dp),
698 DMA_BIDIRECTIONAL);
699
700 return RX_PKT_BUF_SZ;
701 }
702
703 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
704 {
705 struct dma_desc *src_desc, *dest_desc;
706 struct ring_info *src_map, *dest_map;
707 struct rx_header *rh;
708 int dest_idx;
709 __le32 ctrl;
710
711 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
712 dest_desc = &bp->rx_ring[dest_idx];
713 dest_map = &bp->rx_buffers[dest_idx];
714 src_desc = &bp->rx_ring[src_idx];
715 src_map = &bp->rx_buffers[src_idx];
716
717 dest_map->skb = src_map->skb;
718 rh = (struct rx_header *) src_map->skb->data;
719 rh->len = 0;
720 rh->flags = 0;
721 dest_map->mapping = src_map->mapping;
722
723 if (bp->flags & B44_FLAG_RX_RING_HACK)
724 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
725 src_idx * sizeof(*src_desc),
726 DMA_BIDIRECTIONAL);
727
728 ctrl = src_desc->ctrl;
729 if (dest_idx == (B44_RX_RING_SIZE - 1))
730 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
731 else
732 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
733
734 dest_desc->ctrl = ctrl;
735 dest_desc->addr = src_desc->addr;
736
737 src_map->skb = NULL;
738
739 if (bp->flags & B44_FLAG_RX_RING_HACK)
740 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
741 dest_idx * sizeof(*dest_desc),
742 DMA_BIDIRECTIONAL);
743
744 dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
745 RX_PKT_BUF_SZ,
746 DMA_FROM_DEVICE);
747 }
748
749 static int b44_rx(struct b44 *bp, int budget)
750 {
751 int received;
752 u32 cons, prod;
753
754 received = 0;
755 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
756 prod /= sizeof(struct dma_desc);
757 cons = bp->rx_cons;
758
759 while (cons != prod && budget > 0) {
760 struct ring_info *rp = &bp->rx_buffers[cons];
761 struct sk_buff *skb = rp->skb;
762 dma_addr_t map = rp->mapping;
763 struct rx_header *rh;
764 u16 len;
765
766 dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
767 RX_PKT_BUF_SZ,
768 DMA_FROM_DEVICE);
769 rh = (struct rx_header *) skb->data;
770 len = le16_to_cpu(rh->len);
771 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
772 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
773 drop_it:
774 b44_recycle_rx(bp, cons, bp->rx_prod);
775 drop_it_no_recycle:
776 bp->dev->stats.rx_dropped++;
777 goto next_pkt;
778 }
779
780 if (len == 0) {
781 int i = 0;
782
783 do {
784 udelay(2);
785 barrier();
786 len = le16_to_cpu(rh->len);
787 } while (len == 0 && i++ < 5);
788 if (len == 0)
789 goto drop_it;
790 }
791
792 /* Omit CRC. */
793 len -= 4;
794
795 if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
796 int skb_size;
797 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
798 if (skb_size < 0)
799 goto drop_it;
800 dma_unmap_single(bp->sdev->dma_dev, map,
801 skb_size, DMA_FROM_DEVICE);
802 /* Leave out rx_header */
803 skb_put(skb, len + RX_PKT_OFFSET);
804 skb_pull(skb, RX_PKT_OFFSET);
805 } else {
806 struct sk_buff *copy_skb;
807
808 b44_recycle_rx(bp, cons, bp->rx_prod);
809 copy_skb = netdev_alloc_skb(bp->dev, len + 2);
810 if (copy_skb == NULL)
811 goto drop_it_no_recycle;
812
813 skb_reserve(copy_skb, 2);
814 skb_put(copy_skb, len);
815 /* DMA sync done above, copy just the actual packet */
816 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
817 copy_skb->data, len);
818 skb = copy_skb;
819 }
820 skb_checksum_none_assert(skb);
821 skb->protocol = eth_type_trans(skb, bp->dev);
822 netif_receive_skb(skb);
823 received++;
824 budget--;
825 next_pkt:
826 bp->rx_prod = (bp->rx_prod + 1) &
827 (B44_RX_RING_SIZE - 1);
828 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
829 }
830
831 bp->rx_cons = cons;
832 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
833
834 return received;
835 }
836
837 static int b44_poll(struct napi_struct *napi, int budget)
838 {
839 struct b44 *bp = container_of(napi, struct b44, napi);
840 int work_done;
841 unsigned long flags;
842
843 spin_lock_irqsave(&bp->lock, flags);
844
845 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
846 /* spin_lock(&bp->tx_lock); */
847 b44_tx(bp);
848 /* spin_unlock(&bp->tx_lock); */
849 }
850 if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */
851 bp->istat &= ~ISTAT_RFO;
852 b44_disable_ints(bp);
853 ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
854 b44_init_rings(bp);
855 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
856 netif_wake_queue(bp->dev);
857 }
858
859 spin_unlock_irqrestore(&bp->lock, flags);
860
861 work_done = 0;
862 if (bp->istat & ISTAT_RX)
863 work_done += b44_rx(bp, budget);
864
865 if (bp->istat & ISTAT_ERRORS) {
866 spin_lock_irqsave(&bp->lock, flags);
867 b44_halt(bp);
868 b44_init_rings(bp);
869 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
870 netif_wake_queue(bp->dev);
871 spin_unlock_irqrestore(&bp->lock, flags);
872 work_done = 0;
873 }
874
875 if (work_done < budget) {
876 napi_complete(napi);
877 b44_enable_ints(bp);
878 }
879
880 return work_done;
881 }
882
883 static irqreturn_t b44_interrupt(int irq, void *dev_id)
884 {
885 struct net_device *dev = dev_id;
886 struct b44 *bp = netdev_priv(dev);
887 u32 istat, imask;
888 int handled = 0;
889
890 spin_lock(&bp->lock);
891
892 istat = br32(bp, B44_ISTAT);
893 imask = br32(bp, B44_IMASK);
894
895 /* The interrupt mask register controls which interrupt bits
896 * will actually raise an interrupt to the CPU when set by hw/firmware,
897 * but doesn't mask off the bits.
898 */
899 istat &= imask;
900 if (istat) {
901 handled = 1;
902
903 if (unlikely(!netif_running(dev))) {
904 netdev_info(dev, "late interrupt\n");
905 goto irq_ack;
906 }
907
908 if (napi_schedule_prep(&bp->napi)) {
909 /* NOTE: These writes are posted by the readback of
910 * the ISTAT register below.
911 */
912 bp->istat = istat;
913 __b44_disable_ints(bp);
914 __napi_schedule(&bp->napi);
915 }
916
917 irq_ack:
918 bw32(bp, B44_ISTAT, istat);
919 br32(bp, B44_ISTAT);
920 }
921 spin_unlock(&bp->lock);
922 return IRQ_RETVAL(handled);
923 }
924
925 static void b44_tx_timeout(struct net_device *dev)
926 {
927 struct b44 *bp = netdev_priv(dev);
928
929 netdev_err(dev, "transmit timed out, resetting\n");
930
931 spin_lock_irq(&bp->lock);
932
933 b44_halt(bp);
934 b44_init_rings(bp);
935 b44_init_hw(bp, B44_FULL_RESET);
936
937 spin_unlock_irq(&bp->lock);
938
939 b44_enable_ints(bp);
940
941 netif_wake_queue(dev);
942 }
943
944 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
945 {
946 struct b44 *bp = netdev_priv(dev);
947 int rc = NETDEV_TX_OK;
948 dma_addr_t mapping;
949 u32 len, entry, ctrl;
950 unsigned long flags;
951
952 len = skb->len;
953 spin_lock_irqsave(&bp->lock, flags);
954
955 /* This is a hard error, log it. */
956 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
957 netif_stop_queue(dev);
958 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
959 goto err_out;
960 }
961
962 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
963 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
964 struct sk_buff *bounce_skb;
965
966 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
967 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
968 dma_unmap_single(bp->sdev->dma_dev, mapping, len,
969 DMA_TO_DEVICE);
970
971 bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
972 if (!bounce_skb)
973 goto err_out;
974
975 mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
976 len, DMA_TO_DEVICE);
977 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
978 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
979 dma_unmap_single(bp->sdev->dma_dev, mapping,
980 len, DMA_TO_DEVICE);
981 dev_kfree_skb_any(bounce_skb);
982 goto err_out;
983 }
984
985 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
986 dev_kfree_skb_any(skb);
987 skb = bounce_skb;
988 }
989
990 entry = bp->tx_prod;
991 bp->tx_buffers[entry].skb = skb;
992 bp->tx_buffers[entry].mapping = mapping;
993
994 ctrl = (len & DESC_CTRL_LEN);
995 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
996 if (entry == (B44_TX_RING_SIZE - 1))
997 ctrl |= DESC_CTRL_EOT;
998
999 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1000 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1001
1002 if (bp->flags & B44_FLAG_TX_RING_HACK)
1003 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1004 entry * sizeof(bp->tx_ring[0]),
1005 DMA_TO_DEVICE);
1006
1007 entry = NEXT_TX(entry);
1008
1009 bp->tx_prod = entry;
1010
1011 wmb();
1012
1013 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1014 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1015 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1016 if (bp->flags & B44_FLAG_REORDER_BUG)
1017 br32(bp, B44_DMATX_PTR);
1018
1019 if (TX_BUFFS_AVAIL(bp) < 1)
1020 netif_stop_queue(dev);
1021
1022 out_unlock:
1023 spin_unlock_irqrestore(&bp->lock, flags);
1024
1025 return rc;
1026
1027 err_out:
1028 rc = NETDEV_TX_BUSY;
1029 goto out_unlock;
1030 }
1031
1032 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1033 {
1034 struct b44 *bp = netdev_priv(dev);
1035
1036 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1037 return -EINVAL;
1038
1039 if (!netif_running(dev)) {
1040 /* We'll just catch it later when the
1041 * device is up'd.
1042 */
1043 dev->mtu = new_mtu;
1044 return 0;
1045 }
1046
1047 spin_lock_irq(&bp->lock);
1048 b44_halt(bp);
1049 dev->mtu = new_mtu;
1050 b44_init_rings(bp);
1051 b44_init_hw(bp, B44_FULL_RESET);
1052 spin_unlock_irq(&bp->lock);
1053
1054 b44_enable_ints(bp);
1055
1056 return 0;
1057 }
1058
1059 /* Free up pending packets in all rx/tx rings.
1060 *
1061 * The chip has been shut down and the driver detached from
1062 * the networking, so no interrupts or new tx packets will
1063 * end up in the driver. bp->lock is not held and we are not
1064 * in an interrupt context and thus may sleep.
1065 */
1066 static void b44_free_rings(struct b44 *bp)
1067 {
1068 struct ring_info *rp;
1069 int i;
1070
1071 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1072 rp = &bp->rx_buffers[i];
1073
1074 if (rp->skb == NULL)
1075 continue;
1076 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
1077 DMA_FROM_DEVICE);
1078 dev_kfree_skb_any(rp->skb);
1079 rp->skb = NULL;
1080 }
1081
1082 /* XXX needs changes once NETIF_F_SG is set... */
1083 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1084 rp = &bp->tx_buffers[i];
1085
1086 if (rp->skb == NULL)
1087 continue;
1088 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
1089 DMA_TO_DEVICE);
1090 dev_kfree_skb_any(rp->skb);
1091 rp->skb = NULL;
1092 }
1093 }
1094
1095 /* Initialize tx/rx rings for packet processing.
1096 *
1097 * The chip has been shut down and the driver detached from
1098 * the networking, so no interrupts or new tx packets will
1099 * end up in the driver.
1100 */
1101 static void b44_init_rings(struct b44 *bp)
1102 {
1103 int i;
1104
1105 b44_free_rings(bp);
1106
1107 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1108 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1109
1110 if (bp->flags & B44_FLAG_RX_RING_HACK)
1111 dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
1112 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1113
1114 if (bp->flags & B44_FLAG_TX_RING_HACK)
1115 dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
1116 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1117
1118 for (i = 0; i < bp->rx_pending; i++) {
1119 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1120 break;
1121 }
1122 }
1123
1124 /*
1125 * Must not be invoked with interrupt sources disabled and
1126 * the hardware shutdown down.
1127 */
1128 static void b44_free_consistent(struct b44 *bp)
1129 {
1130 kfree(bp->rx_buffers);
1131 bp->rx_buffers = NULL;
1132 kfree(bp->tx_buffers);
1133 bp->tx_buffers = NULL;
1134 if (bp->rx_ring) {
1135 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1136 dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
1137 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1138 kfree(bp->rx_ring);
1139 } else
1140 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1141 bp->rx_ring, bp->rx_ring_dma);
1142 bp->rx_ring = NULL;
1143 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1144 }
1145 if (bp->tx_ring) {
1146 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1147 dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
1148 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1149 kfree(bp->tx_ring);
1150 } else
1151 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1152 bp->tx_ring, bp->tx_ring_dma);
1153 bp->tx_ring = NULL;
1154 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1155 }
1156 }
1157
1158 /*
1159 * Must not be invoked with interrupt sources disabled and
1160 * the hardware shutdown down. Can sleep.
1161 */
1162 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1163 {
1164 int size;
1165
1166 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1167 bp->rx_buffers = kzalloc(size, gfp);
1168 if (!bp->rx_buffers)
1169 goto out_err;
1170
1171 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1172 bp->tx_buffers = kzalloc(size, gfp);
1173 if (!bp->tx_buffers)
1174 goto out_err;
1175
1176 size = DMA_TABLE_BYTES;
1177 bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1178 &bp->rx_ring_dma, gfp);
1179 if (!bp->rx_ring) {
1180 /* Allocation may have failed due to pci_alloc_consistent
1181 insisting on use of GFP_DMA, which is more restrictive
1182 than necessary... */
1183 struct dma_desc *rx_ring;
1184 dma_addr_t rx_ring_dma;
1185
1186 rx_ring = kzalloc(size, gfp);
1187 if (!rx_ring)
1188 goto out_err;
1189
1190 rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
1191 DMA_TABLE_BYTES,
1192 DMA_BIDIRECTIONAL);
1193
1194 if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
1195 rx_ring_dma + size > DMA_BIT_MASK(30)) {
1196 kfree(rx_ring);
1197 goto out_err;
1198 }
1199
1200 bp->rx_ring = rx_ring;
1201 bp->rx_ring_dma = rx_ring_dma;
1202 bp->flags |= B44_FLAG_RX_RING_HACK;
1203 }
1204
1205 bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1206 &bp->tx_ring_dma, gfp);
1207 if (!bp->tx_ring) {
1208 /* Allocation may have failed due to ssb_dma_alloc_consistent
1209 insisting on use of GFP_DMA, which is more restrictive
1210 than necessary... */
1211 struct dma_desc *tx_ring;
1212 dma_addr_t tx_ring_dma;
1213
1214 tx_ring = kzalloc(size, gfp);
1215 if (!tx_ring)
1216 goto out_err;
1217
1218 tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
1219 DMA_TABLE_BYTES,
1220 DMA_TO_DEVICE);
1221
1222 if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
1223 tx_ring_dma + size > DMA_BIT_MASK(30)) {
1224 kfree(tx_ring);
1225 goto out_err;
1226 }
1227
1228 bp->tx_ring = tx_ring;
1229 bp->tx_ring_dma = tx_ring_dma;
1230 bp->flags |= B44_FLAG_TX_RING_HACK;
1231 }
1232
1233 return 0;
1234
1235 out_err:
1236 b44_free_consistent(bp);
1237 return -ENOMEM;
1238 }
1239
1240 /* bp->lock is held. */
1241 static void b44_clear_stats(struct b44 *bp)
1242 {
1243 unsigned long reg;
1244
1245 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1246 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1247 br32(bp, reg);
1248 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1249 br32(bp, reg);
1250 }
1251
1252 /* bp->lock is held. */
1253 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1254 {
1255 struct ssb_device *sdev = bp->sdev;
1256 bool was_enabled;
1257
1258 was_enabled = ssb_device_is_enabled(bp->sdev);
1259
1260 ssb_device_enable(bp->sdev, 0);
1261 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1262
1263 if (was_enabled) {
1264 bw32(bp, B44_RCV_LAZY, 0);
1265 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1266 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1267 bw32(bp, B44_DMATX_CTRL, 0);
1268 bp->tx_prod = bp->tx_cons = 0;
1269 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1270 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1271 100, 0);
1272 }
1273 bw32(bp, B44_DMARX_CTRL, 0);
1274 bp->rx_prod = bp->rx_cons = 0;
1275 }
1276
1277 b44_clear_stats(bp);
1278
1279 /*
1280 * Don't enable PHY if we are doing a partial reset
1281 * we are probably going to power down
1282 */
1283 if (reset_kind == B44_CHIP_RESET_PARTIAL)
1284 return;
1285
1286 switch (sdev->bus->bustype) {
1287 case SSB_BUSTYPE_SSB:
1288 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1289 (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1290 B44_MDC_RATIO)
1291 & MDIO_CTRL_MAXF_MASK)));
1292 break;
1293 case SSB_BUSTYPE_PCI:
1294 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1295 (0x0d & MDIO_CTRL_MAXF_MASK)));
1296 break;
1297 case SSB_BUSTYPE_PCMCIA:
1298 case SSB_BUSTYPE_SDIO:
1299 WARN_ON(1); /* A device with this bus does not exist. */
1300 break;
1301 }
1302
1303 br32(bp, B44_MDIO_CTRL);
1304
1305 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1306 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1307 br32(bp, B44_ENET_CTRL);
1308 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1309 } else {
1310 u32 val = br32(bp, B44_DEVCTRL);
1311
1312 if (val & DEVCTRL_EPR) {
1313 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1314 br32(bp, B44_DEVCTRL);
1315 udelay(100);
1316 }
1317 bp->flags |= B44_FLAG_INTERNAL_PHY;
1318 }
1319 }
1320
1321 /* bp->lock is held. */
1322 static void b44_halt(struct b44 *bp)
1323 {
1324 b44_disable_ints(bp);
1325 /* reset PHY */
1326 b44_phy_reset(bp);
1327 /* power down PHY */
1328 netdev_info(bp->dev, "powering down PHY\n");
1329 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1330 /* now reset the chip, but without enabling the MAC&PHY
1331 * part of it. This has to be done _after_ we shut down the PHY */
1332 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1333 }
1334
1335 /* bp->lock is held. */
1336 static void __b44_set_mac_addr(struct b44 *bp)
1337 {
1338 bw32(bp, B44_CAM_CTRL, 0);
1339 if (!(bp->dev->flags & IFF_PROMISC)) {
1340 u32 val;
1341
1342 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1343 val = br32(bp, B44_CAM_CTRL);
1344 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1345 }
1346 }
1347
1348 static int b44_set_mac_addr(struct net_device *dev, void *p)
1349 {
1350 struct b44 *bp = netdev_priv(dev);
1351 struct sockaddr *addr = p;
1352 u32 val;
1353
1354 if (netif_running(dev))
1355 return -EBUSY;
1356
1357 if (!is_valid_ether_addr(addr->sa_data))
1358 return -EINVAL;
1359
1360 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1361
1362 spin_lock_irq(&bp->lock);
1363
1364 val = br32(bp, B44_RXCONFIG);
1365 if (!(val & RXCONFIG_CAM_ABSENT))
1366 __b44_set_mac_addr(bp);
1367
1368 spin_unlock_irq(&bp->lock);
1369
1370 return 0;
1371 }
1372
1373 /* Called at device open time to get the chip ready for
1374 * packet processing. Invoked with bp->lock held.
1375 */
1376 static void __b44_set_rx_mode(struct net_device *);
1377 static void b44_init_hw(struct b44 *bp, int reset_kind)
1378 {
1379 u32 val;
1380
1381 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1382 if (reset_kind == B44_FULL_RESET) {
1383 b44_phy_reset(bp);
1384 b44_setup_phy(bp);
1385 }
1386
1387 /* Enable CRC32, set proper LED modes and power on PHY */
1388 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1389 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1390
1391 /* This sets the MAC address too. */
1392 __b44_set_rx_mode(bp->dev);
1393
1394 /* MTU + eth header + possible VLAN tag + struct rx_header */
1395 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1396 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1397
1398 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1399 if (reset_kind == B44_PARTIAL_RESET) {
1400 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1401 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1402 } else {
1403 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1404 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1405 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1406 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1407 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1408
1409 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1410 bp->rx_prod = bp->rx_pending;
1411
1412 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1413 }
1414
1415 val = br32(bp, B44_ENET_CTRL);
1416 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1417 }
1418
1419 static int b44_open(struct net_device *dev)
1420 {
1421 struct b44 *bp = netdev_priv(dev);
1422 int err;
1423
1424 err = b44_alloc_consistent(bp, GFP_KERNEL);
1425 if (err)
1426 goto out;
1427
1428 napi_enable(&bp->napi);
1429
1430 b44_init_rings(bp);
1431 b44_init_hw(bp, B44_FULL_RESET);
1432
1433 b44_check_phy(bp);
1434
1435 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1436 if (unlikely(err < 0)) {
1437 napi_disable(&bp->napi);
1438 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1439 b44_free_rings(bp);
1440 b44_free_consistent(bp);
1441 goto out;
1442 }
1443
1444 init_timer(&bp->timer);
1445 bp->timer.expires = jiffies + HZ;
1446 bp->timer.data = (unsigned long) bp;
1447 bp->timer.function = b44_timer;
1448 add_timer(&bp->timer);
1449
1450 b44_enable_ints(bp);
1451 netif_start_queue(dev);
1452 out:
1453 return err;
1454 }
1455
1456 #ifdef CONFIG_NET_POLL_CONTROLLER
1457 /*
1458 * Polling receive - used by netconsole and other diagnostic tools
1459 * to allow network i/o with interrupts disabled.
1460 */
1461 static void b44_poll_controller(struct net_device *dev)
1462 {
1463 disable_irq(dev->irq);
1464 b44_interrupt(dev->irq, dev);
1465 enable_irq(dev->irq);
1466 }
1467 #endif
1468
1469 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1470 {
1471 u32 i;
1472 u32 *pattern = (u32 *) pp;
1473
1474 for (i = 0; i < bytes; i += sizeof(u32)) {
1475 bw32(bp, B44_FILT_ADDR, table_offset + i);
1476 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1477 }
1478 }
1479
1480 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1481 {
1482 int magicsync = 6;
1483 int k, j, len = offset;
1484 int ethaddr_bytes = ETH_ALEN;
1485
1486 memset(ppattern + offset, 0xff, magicsync);
1487 for (j = 0; j < magicsync; j++)
1488 set_bit(len++, (unsigned long *) pmask);
1489
1490 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1491 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1492 ethaddr_bytes = ETH_ALEN;
1493 else
1494 ethaddr_bytes = B44_PATTERN_SIZE - len;
1495 if (ethaddr_bytes <=0)
1496 break;
1497 for (k = 0; k< ethaddr_bytes; k++) {
1498 ppattern[offset + magicsync +
1499 (j * ETH_ALEN) + k] = macaddr[k];
1500 set_bit(len++, (unsigned long *) pmask);
1501 }
1502 }
1503 return len - 1;
1504 }
1505
1506 /* Setup magic packet patterns in the b44 WOL
1507 * pattern matching filter.
1508 */
1509 static void b44_setup_pseudo_magicp(struct b44 *bp)
1510 {
1511
1512 u32 val;
1513 int plen0, plen1, plen2;
1514 u8 *pwol_pattern;
1515 u8 pwol_mask[B44_PMASK_SIZE];
1516
1517 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1518 if (!pwol_pattern) {
1519 pr_err("Memory not available for WOL\n");
1520 return;
1521 }
1522
1523 /* Ipv4 magic packet pattern - pattern 0.*/
1524 memset(pwol_mask, 0, B44_PMASK_SIZE);
1525 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1526 B44_ETHIPV4UDP_HLEN);
1527
1528 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1529 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1530
1531 /* Raw ethernet II magic packet pattern - pattern 1 */
1532 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1533 memset(pwol_mask, 0, B44_PMASK_SIZE);
1534 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1535 ETH_HLEN);
1536
1537 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1538 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1539 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1540 B44_PMASK_BASE + B44_PMASK_SIZE);
1541
1542 /* Ipv6 magic packet pattern - pattern 2 */
1543 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1544 memset(pwol_mask, 0, B44_PMASK_SIZE);
1545 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1546 B44_ETHIPV6UDP_HLEN);
1547
1548 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1549 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1550 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1551 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1552
1553 kfree(pwol_pattern);
1554
1555 /* set these pattern's lengths: one less than each real length */
1556 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1557 bw32(bp, B44_WKUP_LEN, val);
1558
1559 /* enable wakeup pattern matching */
1560 val = br32(bp, B44_DEVCTRL);
1561 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1562
1563 }
1564
1565 #ifdef CONFIG_B44_PCI
1566 static void b44_setup_wol_pci(struct b44 *bp)
1567 {
1568 u16 val;
1569
1570 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1571 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1572 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1573 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1574 }
1575 }
1576 #else
1577 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1578 #endif /* CONFIG_B44_PCI */
1579
1580 static void b44_setup_wol(struct b44 *bp)
1581 {
1582 u32 val;
1583
1584 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1585
1586 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1587
1588 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1589
1590 val = bp->dev->dev_addr[2] << 24 |
1591 bp->dev->dev_addr[3] << 16 |
1592 bp->dev->dev_addr[4] << 8 |
1593 bp->dev->dev_addr[5];
1594 bw32(bp, B44_ADDR_LO, val);
1595
1596 val = bp->dev->dev_addr[0] << 8 |
1597 bp->dev->dev_addr[1];
1598 bw32(bp, B44_ADDR_HI, val);
1599
1600 val = br32(bp, B44_DEVCTRL);
1601 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1602
1603 } else {
1604 b44_setup_pseudo_magicp(bp);
1605 }
1606 b44_setup_wol_pci(bp);
1607 }
1608
1609 static int b44_close(struct net_device *dev)
1610 {
1611 struct b44 *bp = netdev_priv(dev);
1612
1613 netif_stop_queue(dev);
1614
1615 napi_disable(&bp->napi);
1616
1617 del_timer_sync(&bp->timer);
1618
1619 spin_lock_irq(&bp->lock);
1620
1621 b44_halt(bp);
1622 b44_free_rings(bp);
1623 netif_carrier_off(dev);
1624
1625 spin_unlock_irq(&bp->lock);
1626
1627 free_irq(dev->irq, dev);
1628
1629 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1630 b44_init_hw(bp, B44_PARTIAL_RESET);
1631 b44_setup_wol(bp);
1632 }
1633
1634 b44_free_consistent(bp);
1635
1636 return 0;
1637 }
1638
1639 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1640 {
1641 struct b44 *bp = netdev_priv(dev);
1642 struct net_device_stats *nstat = &dev->stats;
1643 struct b44_hw_stats *hwstat = &bp->hw_stats;
1644
1645 /* Convert HW stats into netdevice stats. */
1646 nstat->rx_packets = hwstat->rx_pkts;
1647 nstat->tx_packets = hwstat->tx_pkts;
1648 nstat->rx_bytes = hwstat->rx_octets;
1649 nstat->tx_bytes = hwstat->tx_octets;
1650 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1651 hwstat->tx_oversize_pkts +
1652 hwstat->tx_underruns +
1653 hwstat->tx_excessive_cols +
1654 hwstat->tx_late_cols);
1655 nstat->multicast = hwstat->tx_multicast_pkts;
1656 nstat->collisions = hwstat->tx_total_cols;
1657
1658 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1659 hwstat->rx_undersize);
1660 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1661 nstat->rx_frame_errors = hwstat->rx_align_errs;
1662 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1663 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1664 hwstat->rx_oversize_pkts +
1665 hwstat->rx_missed_pkts +
1666 hwstat->rx_crc_align_errs +
1667 hwstat->rx_undersize +
1668 hwstat->rx_crc_errs +
1669 hwstat->rx_align_errs +
1670 hwstat->rx_symbol_errs);
1671
1672 nstat->tx_aborted_errors = hwstat->tx_underruns;
1673 #if 0
1674 /* Carrier lost counter seems to be broken for some devices */
1675 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1676 #endif
1677
1678 return nstat;
1679 }
1680
1681 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1682 {
1683 struct netdev_hw_addr *ha;
1684 int i, num_ents;
1685
1686 num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
1687 i = 0;
1688 netdev_for_each_mc_addr(ha, dev) {
1689 if (i == num_ents)
1690 break;
1691 __b44_cam_write(bp, ha->addr, i++ + 1);
1692 }
1693 return i+1;
1694 }
1695
1696 static void __b44_set_rx_mode(struct net_device *dev)
1697 {
1698 struct b44 *bp = netdev_priv(dev);
1699 u32 val;
1700
1701 val = br32(bp, B44_RXCONFIG);
1702 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1703 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1704 val |= RXCONFIG_PROMISC;
1705 bw32(bp, B44_RXCONFIG, val);
1706 } else {
1707 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1708 int i = 1;
1709
1710 __b44_set_mac_addr(bp);
1711
1712 if ((dev->flags & IFF_ALLMULTI) ||
1713 (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
1714 val |= RXCONFIG_ALLMULTI;
1715 else
1716 i = __b44_load_mcast(bp, dev);
1717
1718 for (; i < 64; i++)
1719 __b44_cam_write(bp, zero, i);
1720
1721 bw32(bp, B44_RXCONFIG, val);
1722 val = br32(bp, B44_CAM_CTRL);
1723 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1724 }
1725 }
1726
1727 static void b44_set_rx_mode(struct net_device *dev)
1728 {
1729 struct b44 *bp = netdev_priv(dev);
1730
1731 spin_lock_irq(&bp->lock);
1732 __b44_set_rx_mode(dev);
1733 spin_unlock_irq(&bp->lock);
1734 }
1735
1736 static u32 b44_get_msglevel(struct net_device *dev)
1737 {
1738 struct b44 *bp = netdev_priv(dev);
1739 return bp->msg_enable;
1740 }
1741
1742 static void b44_set_msglevel(struct net_device *dev, u32 value)
1743 {
1744 struct b44 *bp = netdev_priv(dev);
1745 bp->msg_enable = value;
1746 }
1747
1748 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1749 {
1750 struct b44 *bp = netdev_priv(dev);
1751 struct ssb_bus *bus = bp->sdev->bus;
1752
1753 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1754 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
1755 switch (bus->bustype) {
1756 case SSB_BUSTYPE_PCI:
1757 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1758 break;
1759 case SSB_BUSTYPE_SSB:
1760 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
1761 break;
1762 case SSB_BUSTYPE_PCMCIA:
1763 case SSB_BUSTYPE_SDIO:
1764 WARN_ON(1); /* A device with this bus does not exist. */
1765 break;
1766 }
1767 }
1768
1769 static int b44_nway_reset(struct net_device *dev)
1770 {
1771 struct b44 *bp = netdev_priv(dev);
1772 u32 bmcr;
1773 int r;
1774
1775 spin_lock_irq(&bp->lock);
1776 b44_readphy(bp, MII_BMCR, &bmcr);
1777 b44_readphy(bp, MII_BMCR, &bmcr);
1778 r = -EINVAL;
1779 if (bmcr & BMCR_ANENABLE) {
1780 b44_writephy(bp, MII_BMCR,
1781 bmcr | BMCR_ANRESTART);
1782 r = 0;
1783 }
1784 spin_unlock_irq(&bp->lock);
1785
1786 return r;
1787 }
1788
1789 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1790 {
1791 struct b44 *bp = netdev_priv(dev);
1792
1793 cmd->supported = (SUPPORTED_Autoneg);
1794 cmd->supported |= (SUPPORTED_100baseT_Half |
1795 SUPPORTED_100baseT_Full |
1796 SUPPORTED_10baseT_Half |
1797 SUPPORTED_10baseT_Full |
1798 SUPPORTED_MII);
1799
1800 cmd->advertising = 0;
1801 if (bp->flags & B44_FLAG_ADV_10HALF)
1802 cmd->advertising |= ADVERTISED_10baseT_Half;
1803 if (bp->flags & B44_FLAG_ADV_10FULL)
1804 cmd->advertising |= ADVERTISED_10baseT_Full;
1805 if (bp->flags & B44_FLAG_ADV_100HALF)
1806 cmd->advertising |= ADVERTISED_100baseT_Half;
1807 if (bp->flags & B44_FLAG_ADV_100FULL)
1808 cmd->advertising |= ADVERTISED_100baseT_Full;
1809 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1810 cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1811 SPEED_100 : SPEED_10;
1812 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1813 DUPLEX_FULL : DUPLEX_HALF;
1814 cmd->port = 0;
1815 cmd->phy_address = bp->phy_addr;
1816 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1817 XCVR_INTERNAL : XCVR_EXTERNAL;
1818 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1819 AUTONEG_DISABLE : AUTONEG_ENABLE;
1820 if (cmd->autoneg == AUTONEG_ENABLE)
1821 cmd->advertising |= ADVERTISED_Autoneg;
1822 if (!netif_running(dev)){
1823 cmd->speed = 0;
1824 cmd->duplex = 0xff;
1825 }
1826 cmd->maxtxpkt = 0;
1827 cmd->maxrxpkt = 0;
1828 return 0;
1829 }
1830
1831 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1832 {
1833 struct b44 *bp = netdev_priv(dev);
1834
1835 /* We do not support gigabit. */
1836 if (cmd->autoneg == AUTONEG_ENABLE) {
1837 if (cmd->advertising &
1838 (ADVERTISED_1000baseT_Half |
1839 ADVERTISED_1000baseT_Full))
1840 return -EINVAL;
1841 } else if ((cmd->speed != SPEED_100 &&
1842 cmd->speed != SPEED_10) ||
1843 (cmd->duplex != DUPLEX_HALF &&
1844 cmd->duplex != DUPLEX_FULL)) {
1845 return -EINVAL;
1846 }
1847
1848 spin_lock_irq(&bp->lock);
1849
1850 if (cmd->autoneg == AUTONEG_ENABLE) {
1851 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1852 B44_FLAG_100_BASE_T |
1853 B44_FLAG_FULL_DUPLEX |
1854 B44_FLAG_ADV_10HALF |
1855 B44_FLAG_ADV_10FULL |
1856 B44_FLAG_ADV_100HALF |
1857 B44_FLAG_ADV_100FULL);
1858 if (cmd->advertising == 0) {
1859 bp->flags |= (B44_FLAG_ADV_10HALF |
1860 B44_FLAG_ADV_10FULL |
1861 B44_FLAG_ADV_100HALF |
1862 B44_FLAG_ADV_100FULL);
1863 } else {
1864 if (cmd->advertising & ADVERTISED_10baseT_Half)
1865 bp->flags |= B44_FLAG_ADV_10HALF;
1866 if (cmd->advertising & ADVERTISED_10baseT_Full)
1867 bp->flags |= B44_FLAG_ADV_10FULL;
1868 if (cmd->advertising & ADVERTISED_100baseT_Half)
1869 bp->flags |= B44_FLAG_ADV_100HALF;
1870 if (cmd->advertising & ADVERTISED_100baseT_Full)
1871 bp->flags |= B44_FLAG_ADV_100FULL;
1872 }
1873 } else {
1874 bp->flags |= B44_FLAG_FORCE_LINK;
1875 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1876 if (cmd->speed == SPEED_100)
1877 bp->flags |= B44_FLAG_100_BASE_T;
1878 if (cmd->duplex == DUPLEX_FULL)
1879 bp->flags |= B44_FLAG_FULL_DUPLEX;
1880 }
1881
1882 if (netif_running(dev))
1883 b44_setup_phy(bp);
1884
1885 spin_unlock_irq(&bp->lock);
1886
1887 return 0;
1888 }
1889
1890 static void b44_get_ringparam(struct net_device *dev,
1891 struct ethtool_ringparam *ering)
1892 {
1893 struct b44 *bp = netdev_priv(dev);
1894
1895 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1896 ering->rx_pending = bp->rx_pending;
1897
1898 /* XXX ethtool lacks a tx_max_pending, oops... */
1899 }
1900
1901 static int b44_set_ringparam(struct net_device *dev,
1902 struct ethtool_ringparam *ering)
1903 {
1904 struct b44 *bp = netdev_priv(dev);
1905
1906 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1907 (ering->rx_mini_pending != 0) ||
1908 (ering->rx_jumbo_pending != 0) ||
1909 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1910 return -EINVAL;
1911
1912 spin_lock_irq(&bp->lock);
1913
1914 bp->rx_pending = ering->rx_pending;
1915 bp->tx_pending = ering->tx_pending;
1916
1917 b44_halt(bp);
1918 b44_init_rings(bp);
1919 b44_init_hw(bp, B44_FULL_RESET);
1920 netif_wake_queue(bp->dev);
1921 spin_unlock_irq(&bp->lock);
1922
1923 b44_enable_ints(bp);
1924
1925 return 0;
1926 }
1927
1928 static void b44_get_pauseparam(struct net_device *dev,
1929 struct ethtool_pauseparam *epause)
1930 {
1931 struct b44 *bp = netdev_priv(dev);
1932
1933 epause->autoneg =
1934 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1935 epause->rx_pause =
1936 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1937 epause->tx_pause =
1938 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1939 }
1940
1941 static int b44_set_pauseparam(struct net_device *dev,
1942 struct ethtool_pauseparam *epause)
1943 {
1944 struct b44 *bp = netdev_priv(dev);
1945
1946 spin_lock_irq(&bp->lock);
1947 if (epause->autoneg)
1948 bp->flags |= B44_FLAG_PAUSE_AUTO;
1949 else
1950 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1951 if (epause->rx_pause)
1952 bp->flags |= B44_FLAG_RX_PAUSE;
1953 else
1954 bp->flags &= ~B44_FLAG_RX_PAUSE;
1955 if (epause->tx_pause)
1956 bp->flags |= B44_FLAG_TX_PAUSE;
1957 else
1958 bp->flags &= ~B44_FLAG_TX_PAUSE;
1959 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1960 b44_halt(bp);
1961 b44_init_rings(bp);
1962 b44_init_hw(bp, B44_FULL_RESET);
1963 } else {
1964 __b44_set_flow_ctrl(bp, bp->flags);
1965 }
1966 spin_unlock_irq(&bp->lock);
1967
1968 b44_enable_ints(bp);
1969
1970 return 0;
1971 }
1972
1973 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1974 {
1975 switch(stringset) {
1976 case ETH_SS_STATS:
1977 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1978 break;
1979 }
1980 }
1981
1982 static int b44_get_sset_count(struct net_device *dev, int sset)
1983 {
1984 switch (sset) {
1985 case ETH_SS_STATS:
1986 return ARRAY_SIZE(b44_gstrings);
1987 default:
1988 return -EOPNOTSUPP;
1989 }
1990 }
1991
1992 static void b44_get_ethtool_stats(struct net_device *dev,
1993 struct ethtool_stats *stats, u64 *data)
1994 {
1995 struct b44 *bp = netdev_priv(dev);
1996 u32 *val = &bp->hw_stats.tx_good_octets;
1997 u32 i;
1998
1999 spin_lock_irq(&bp->lock);
2000
2001 b44_stats_update(bp);
2002
2003 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2004 *data++ = *val++;
2005
2006 spin_unlock_irq(&bp->lock);
2007 }
2008
2009 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2010 {
2011 struct b44 *bp = netdev_priv(dev);
2012
2013 wol->supported = WAKE_MAGIC;
2014 if (bp->flags & B44_FLAG_WOL_ENABLE)
2015 wol->wolopts = WAKE_MAGIC;
2016 else
2017 wol->wolopts = 0;
2018 memset(&wol->sopass, 0, sizeof(wol->sopass));
2019 }
2020
2021 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2022 {
2023 struct b44 *bp = netdev_priv(dev);
2024
2025 spin_lock_irq(&bp->lock);
2026 if (wol->wolopts & WAKE_MAGIC)
2027 bp->flags |= B44_FLAG_WOL_ENABLE;
2028 else
2029 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2030 spin_unlock_irq(&bp->lock);
2031
2032 return 0;
2033 }
2034
2035 static const struct ethtool_ops b44_ethtool_ops = {
2036 .get_drvinfo = b44_get_drvinfo,
2037 .get_settings = b44_get_settings,
2038 .set_settings = b44_set_settings,
2039 .nway_reset = b44_nway_reset,
2040 .get_link = ethtool_op_get_link,
2041 .get_wol = b44_get_wol,
2042 .set_wol = b44_set_wol,
2043 .get_ringparam = b44_get_ringparam,
2044 .set_ringparam = b44_set_ringparam,
2045 .get_pauseparam = b44_get_pauseparam,
2046 .set_pauseparam = b44_set_pauseparam,
2047 .get_msglevel = b44_get_msglevel,
2048 .set_msglevel = b44_set_msglevel,
2049 .get_strings = b44_get_strings,
2050 .get_sset_count = b44_get_sset_count,
2051 .get_ethtool_stats = b44_get_ethtool_stats,
2052 };
2053
2054 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2055 {
2056 struct mii_ioctl_data *data = if_mii(ifr);
2057 struct b44 *bp = netdev_priv(dev);
2058 int err = -EINVAL;
2059
2060 if (!netif_running(dev))
2061 goto out;
2062
2063 spin_lock_irq(&bp->lock);
2064 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2065 spin_unlock_irq(&bp->lock);
2066 out:
2067 return err;
2068 }
2069
2070 static int __devinit b44_get_invariants(struct b44 *bp)
2071 {
2072 struct ssb_device *sdev = bp->sdev;
2073 int err = 0;
2074 u8 *addr;
2075
2076 bp->dma_offset = ssb_dma_translation(sdev);
2077
2078 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2079 instance > 1) {
2080 addr = sdev->bus->sprom.et1mac;
2081 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2082 } else {
2083 addr = sdev->bus->sprom.et0mac;
2084 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2085 }
2086 /* Some ROMs have buggy PHY addresses with the high
2087 * bits set (sign extension?). Truncate them to a
2088 * valid PHY address. */
2089 bp->phy_addr &= 0x1F;
2090
2091 memcpy(bp->dev->dev_addr, addr, 6);
2092
2093 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2094 pr_err("Invalid MAC address found in EEPROM\n");
2095 return -EINVAL;
2096 }
2097
2098 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2099
2100 bp->imask = IMASK_DEF;
2101
2102 /* XXX - really required?
2103 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2104 */
2105
2106 if (bp->sdev->id.revision >= 7)
2107 bp->flags |= B44_FLAG_B0_ANDLATER;
2108
2109 return err;
2110 }
2111
2112 static const struct net_device_ops b44_netdev_ops = {
2113 .ndo_open = b44_open,
2114 .ndo_stop = b44_close,
2115 .ndo_start_xmit = b44_start_xmit,
2116 .ndo_get_stats = b44_get_stats,
2117 .ndo_set_multicast_list = b44_set_rx_mode,
2118 .ndo_set_mac_address = b44_set_mac_addr,
2119 .ndo_validate_addr = eth_validate_addr,
2120 .ndo_do_ioctl = b44_ioctl,
2121 .ndo_tx_timeout = b44_tx_timeout,
2122 .ndo_change_mtu = b44_change_mtu,
2123 #ifdef CONFIG_NET_POLL_CONTROLLER
2124 .ndo_poll_controller = b44_poll_controller,
2125 #endif
2126 };
2127
2128 static int __devinit b44_init_one(struct ssb_device *sdev,
2129 const struct ssb_device_id *ent)
2130 {
2131 static int b44_version_printed = 0;
2132 struct net_device *dev;
2133 struct b44 *bp;
2134 int err;
2135
2136 instance++;
2137
2138 if (b44_version_printed++ == 0)
2139 pr_info("%s", version);
2140
2141
2142 dev = alloc_etherdev(sizeof(*bp));
2143 if (!dev) {
2144 dev_err(sdev->dev, "Etherdev alloc failed, aborting\n");
2145 err = -ENOMEM;
2146 goto out;
2147 }
2148
2149 SET_NETDEV_DEV(dev, sdev->dev);
2150
2151 /* No interesting netdevice features in this card... */
2152 dev->features |= 0;
2153
2154 bp = netdev_priv(dev);
2155 bp->sdev = sdev;
2156 bp->dev = dev;
2157 bp->force_copybreak = 0;
2158
2159 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2160
2161 spin_lock_init(&bp->lock);
2162
2163 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2164 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2165
2166 dev->netdev_ops = &b44_netdev_ops;
2167 netif_napi_add(dev, &bp->napi, b44_poll, 64);
2168 dev->watchdog_timeo = B44_TX_TIMEOUT;
2169 dev->irq = sdev->irq;
2170 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2171
2172 err = ssb_bus_powerup(sdev->bus, 0);
2173 if (err) {
2174 dev_err(sdev->dev,
2175 "Failed to powerup the bus\n");
2176 goto err_out_free_dev;
2177 }
2178
2179 if (dma_set_mask(sdev->dma_dev, DMA_BIT_MASK(30)) ||
2180 dma_set_coherent_mask(sdev->dma_dev, DMA_BIT_MASK(30))) {
2181 dev_err(sdev->dev,
2182 "Required 30BIT DMA mask unsupported by the system\n");
2183 goto err_out_powerdown;
2184 }
2185
2186 err = b44_get_invariants(bp);
2187 if (err) {
2188 dev_err(sdev->dev,
2189 "Problem fetching invariants of chip, aborting\n");
2190 goto err_out_powerdown;
2191 }
2192
2193 bp->mii_if.dev = dev;
2194 bp->mii_if.mdio_read = b44_mii_read;
2195 bp->mii_if.mdio_write = b44_mii_write;
2196 bp->mii_if.phy_id = bp->phy_addr;
2197 bp->mii_if.phy_id_mask = 0x1f;
2198 bp->mii_if.reg_num_mask = 0x1f;
2199
2200 /* By default, advertise all speed/duplex settings. */
2201 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2202 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2203
2204 /* By default, auto-negotiate PAUSE. */
2205 bp->flags |= B44_FLAG_PAUSE_AUTO;
2206
2207 err = register_netdev(dev);
2208 if (err) {
2209 dev_err(sdev->dev, "Cannot register net device, aborting\n");
2210 goto err_out_powerdown;
2211 }
2212
2213 netif_carrier_off(dev);
2214
2215 ssb_set_drvdata(sdev, dev);
2216
2217 /* Chip reset provides power to the b44 MAC & PCI cores, which
2218 * is necessary for MAC register access.
2219 */
2220 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2221
2222 /* do a phy reset to test if there is an active phy */
2223 if (b44_phy_reset(bp) < 0)
2224 bp->phy_addr = B44_PHY_ADDR_NO_PHY;
2225
2226 netdev_info(dev, "Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2227 dev->dev_addr);
2228
2229 return 0;
2230
2231 err_out_powerdown:
2232 ssb_bus_may_powerdown(sdev->bus);
2233
2234 err_out_free_dev:
2235 free_netdev(dev);
2236
2237 out:
2238 return err;
2239 }
2240
2241 static void __devexit b44_remove_one(struct ssb_device *sdev)
2242 {
2243 struct net_device *dev = ssb_get_drvdata(sdev);
2244
2245 unregister_netdev(dev);
2246 ssb_device_disable(sdev, 0);
2247 ssb_bus_may_powerdown(sdev->bus);
2248 free_netdev(dev);
2249 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2250 ssb_set_drvdata(sdev, NULL);
2251 }
2252
2253 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2254 {
2255 struct net_device *dev = ssb_get_drvdata(sdev);
2256 struct b44 *bp = netdev_priv(dev);
2257
2258 if (!netif_running(dev))
2259 return 0;
2260
2261 del_timer_sync(&bp->timer);
2262
2263 spin_lock_irq(&bp->lock);
2264
2265 b44_halt(bp);
2266 netif_carrier_off(bp->dev);
2267 netif_device_detach(bp->dev);
2268 b44_free_rings(bp);
2269
2270 spin_unlock_irq(&bp->lock);
2271
2272 free_irq(dev->irq, dev);
2273 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2274 b44_init_hw(bp, B44_PARTIAL_RESET);
2275 b44_setup_wol(bp);
2276 }
2277
2278 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2279 return 0;
2280 }
2281
2282 static int b44_resume(struct ssb_device *sdev)
2283 {
2284 struct net_device *dev = ssb_get_drvdata(sdev);
2285 struct b44 *bp = netdev_priv(dev);
2286 int rc = 0;
2287
2288 rc = ssb_bus_powerup(sdev->bus, 0);
2289 if (rc) {
2290 dev_err(sdev->dev,
2291 "Failed to powerup the bus\n");
2292 return rc;
2293 }
2294
2295 if (!netif_running(dev))
2296 return 0;
2297
2298 spin_lock_irq(&bp->lock);
2299 b44_init_rings(bp);
2300 b44_init_hw(bp, B44_FULL_RESET);
2301 spin_unlock_irq(&bp->lock);
2302
2303 /*
2304 * As a shared interrupt, the handler can be called immediately. To be
2305 * able to check the interrupt status the hardware must already be
2306 * powered back on (b44_init_hw).
2307 */
2308 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2309 if (rc) {
2310 netdev_err(dev, "request_irq failed\n");
2311 spin_lock_irq(&bp->lock);
2312 b44_halt(bp);
2313 b44_free_rings(bp);
2314 spin_unlock_irq(&bp->lock);
2315 return rc;
2316 }
2317
2318 netif_device_attach(bp->dev);
2319
2320 b44_enable_ints(bp);
2321 netif_wake_queue(dev);
2322
2323 mod_timer(&bp->timer, jiffies + 1);
2324
2325 return 0;
2326 }
2327
2328 static struct ssb_driver b44_ssb_driver = {
2329 .name = DRV_MODULE_NAME,
2330 .id_table = b44_ssb_tbl,
2331 .probe = b44_init_one,
2332 .remove = __devexit_p(b44_remove_one),
2333 .suspend = b44_suspend,
2334 .resume = b44_resume,
2335 };
2336
2337 static inline int b44_pci_init(void)
2338 {
2339 int err = 0;
2340 #ifdef CONFIG_B44_PCI
2341 err = ssb_pcihost_register(&b44_pci_driver);
2342 #endif
2343 return err;
2344 }
2345
2346 static inline void b44_pci_exit(void)
2347 {
2348 #ifdef CONFIG_B44_PCI
2349 ssb_pcihost_unregister(&b44_pci_driver);
2350 #endif
2351 }
2352
2353 static int __init b44_init(void)
2354 {
2355 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2356 int err;
2357
2358 /* Setup paramaters for syncing RX/TX DMA descriptors */
2359 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2360
2361 err = b44_pci_init();
2362 if (err)
2363 return err;
2364 err = ssb_driver_register(&b44_ssb_driver);
2365 if (err)
2366 b44_pci_exit();
2367 return err;
2368 }
2369
2370 static void __exit b44_cleanup(void)
2371 {
2372 ssb_driver_unregister(&b44_ssb_driver);
2373 b44_pci_exit();
2374 }
2375
2376 module_init(b44_init);
2377 module_exit(b44_cleanup);
2378
Linux kernel - Deliverables
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