?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
packet: Add fanout support.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / b44.c
blob98c977ed9ade7eeed13b3b470db9feb92802d3b8
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/interrupt.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/ssb/ssb.h>
31 #include <linux/slab.h>
32
33 #include <asm/uaccess.h>
34 #include <asm/io.h>
35 #include <asm/irq.h>
36
37
38 #include "b44.h"
39
40 #define DRV_MODULE_NAME "b44"
41 #define DRV_MODULE_VERSION "2.0"
42
43 #define B44_DEF_MSG_ENABLE \
44 (NETIF_MSG_DRV | \
45 NETIF_MSG_PROBE | \
46 NETIF_MSG_LINK | \
47 NETIF_MSG_TIMER | \
48 NETIF_MSG_IFDOWN | \
49 NETIF_MSG_IFUP | \
50 NETIF_MSG_RX_ERR | \
51 NETIF_MSG_TX_ERR)
52
53 /* length of time before we decide the hardware is borked,
54 * and dev->tx_timeout() should be called to fix the problem
55 */
56 #define B44_TX_TIMEOUT (5 * HZ)
57
58 /* hardware minimum and maximum for a single frame's data payload */
59 #define B44_MIN_MTU 60
60 #define B44_MAX_MTU 1500
61
62 #define B44_RX_RING_SIZE 512
63 #define B44_DEF_RX_RING_PENDING 200
64 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
65 B44_RX_RING_SIZE)
66 #define B44_TX_RING_SIZE 512
67 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
68 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
69 B44_TX_RING_SIZE)
70
71 #define TX_RING_GAP(BP) \
72 (B44_TX_RING_SIZE - (BP)->tx_pending)
73 #define TX_BUFFS_AVAIL(BP) \
74 (((BP)->tx_cons <= (BP)->tx_prod) ? \
75 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
76 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
77 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
78
79 #define RX_PKT_OFFSET (RX_HEADER_LEN + 2)
80 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET)
81
82 /* minimum number of free TX descriptors required to wake up TX process */
83 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
84
85 /* b44 internal pattern match filter info */
86 #define B44_PATTERN_BASE 0x400
87 #define B44_PATTERN_SIZE 0x80
88 #define B44_PMASK_BASE 0x600
89 #define B44_PMASK_SIZE 0x10
90 #define B44_MAX_PATTERNS 16
91 #define B44_ETHIPV6UDP_HLEN 62
92 #define B44_ETHIPV4UDP_HLEN 42
93
94 static char version[] __devinitdata =
95 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION "\n";
96
97 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
98 MODULE_DESCRIPTION("Broadcom 44xx/47xx 10/100 PCI ethernet driver");
99 MODULE_LICENSE("GPL");
100 MODULE_VERSION(DRV_MODULE_VERSION);
101
102 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
103 module_param(b44_debug, int, 0);
104 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
105
106
107 #ifdef CONFIG_B44_PCI
108 static DEFINE_PCI_DEVICE_TABLE(b44_pci_tbl) = {
109 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
110 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
111 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
112 { 0 } /* terminate list with empty entry */
113 };
114 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
115
116 static struct pci_driver b44_pci_driver = {
117 .name = DRV_MODULE_NAME,
118 .id_table = b44_pci_tbl,
119 };
120 #endif /* CONFIG_B44_PCI */
121
122 static const struct ssb_device_id b44_ssb_tbl[] = {
123 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
124 SSB_DEVTABLE_END
125 };
126 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
127
128 static void b44_halt(struct b44 *);
129 static void b44_init_rings(struct b44 *);
130
131 #define B44_FULL_RESET 1
132 #define B44_FULL_RESET_SKIP_PHY 2
133 #define B44_PARTIAL_RESET 3
134 #define B44_CHIP_RESET_FULL 4
135 #define B44_CHIP_RESET_PARTIAL 5
136
137 static void b44_init_hw(struct b44 *, int);
138
139 static int dma_desc_sync_size;
140 static int instance;
141
142 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
143 #define _B44(x...) # x,
144 B44_STAT_REG_DECLARE
145 #undef _B44
146 };
147
148 static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
149 dma_addr_t dma_base,
150 unsigned long offset,
151 enum dma_data_direction dir)
152 {
153 dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
154 dma_desc_sync_size, dir);
155 }
156
157 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
158 dma_addr_t dma_base,
159 unsigned long offset,
160 enum dma_data_direction dir)
161 {
162 dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
163 dma_desc_sync_size, dir);
164 }
165
166 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
167 {
168 return ssb_read32(bp->sdev, reg);
169 }
170
171 static inline void bw32(const struct b44 *bp,
172 unsigned long reg, unsigned long val)
173 {
174 ssb_write32(bp->sdev, reg, val);
175 }
176
177 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
178 u32 bit, unsigned long timeout, const int clear)
179 {
180 unsigned long i;
181
182 for (i = 0; i < timeout; i++) {
183 u32 val = br32(bp, reg);
184
185 if (clear && !(val & bit))
186 break;
187 if (!clear && (val & bit))
188 break;
189 udelay(10);
190 }
191 if (i == timeout) {
192 if (net_ratelimit())
193 netdev_err(bp->dev, "BUG! Timeout waiting for bit %08x of register %lx to %s\n",
194 bit, reg, clear ? "clear" : "set");
195
196 return -ENODEV;
197 }
198 return 0;
199 }
200
201 static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
202 {
203 u32 val;
204
205 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
206 (index << CAM_CTRL_INDEX_SHIFT)));
207
208 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
209
210 val = br32(bp, B44_CAM_DATA_LO);
211
212 data[2] = (val >> 24) & 0xFF;
213 data[3] = (val >> 16) & 0xFF;
214 data[4] = (val >> 8) & 0xFF;
215 data[5] = (val >> 0) & 0xFF;
216
217 val = br32(bp, B44_CAM_DATA_HI);
218
219 data[0] = (val >> 8) & 0xFF;
220 data[1] = (val >> 0) & 0xFF;
221 }
222
223 static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
224 {
225 u32 val;
226
227 val = ((u32) data[2]) << 24;
228 val |= ((u32) data[3]) << 16;
229 val |= ((u32) data[4]) << 8;
230 val |= ((u32) data[5]) << 0;
231 bw32(bp, B44_CAM_DATA_LO, val);
232 val = (CAM_DATA_HI_VALID |
233 (((u32) data[0]) << 8) |
234 (((u32) data[1]) << 0));
235 bw32(bp, B44_CAM_DATA_HI, val);
236 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
237 (index << CAM_CTRL_INDEX_SHIFT)));
238 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
239 }
240
241 static inline void __b44_disable_ints(struct b44 *bp)
242 {
243 bw32(bp, B44_IMASK, 0);
244 }
245
246 static void b44_disable_ints(struct b44 *bp)
247 {
248 __b44_disable_ints(bp);
249
250 /* Flush posted writes. */
251 br32(bp, B44_IMASK);
252 }
253
254 static void b44_enable_ints(struct b44 *bp)
255 {
256 bw32(bp, B44_IMASK, bp->imask);
257 }
258
259 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
260 {
261 int err;
262
263 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
264 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
265 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
266 (phy_addr << MDIO_DATA_PMD_SHIFT) |
267 (reg << MDIO_DATA_RA_SHIFT) |
268 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
269 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
270 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
271
272 return err;
273 }
274
275 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
276 {
277 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
278 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
279 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
280 (phy_addr << MDIO_DATA_PMD_SHIFT) |
281 (reg << MDIO_DATA_RA_SHIFT) |
282 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
283 (val & MDIO_DATA_DATA)));
284 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
285 }
286
287 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
288 {
289 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
290 return 0;
291
292 return __b44_readphy(bp, bp->phy_addr, reg, val);
293 }
294
295 static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
296 {
297 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
298 return 0;
299
300 return __b44_writephy(bp, bp->phy_addr, reg, val);
301 }
302
303 /* miilib interface */
304 static int b44_mii_read(struct net_device *dev, int phy_id, int location)
305 {
306 u32 val;
307 struct b44 *bp = netdev_priv(dev);
308 int rc = __b44_readphy(bp, phy_id, location, &val);
309 if (rc)
310 return 0xffffffff;
311 return val;
312 }
313
314 static void b44_mii_write(struct net_device *dev, int phy_id, int location,
315 int val)
316 {
317 struct b44 *bp = netdev_priv(dev);
318 __b44_writephy(bp, phy_id, location, val);
319 }
320
321 static int b44_phy_reset(struct b44 *bp)
322 {
323 u32 val;
324 int err;
325
326 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
327 return 0;
328 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
329 if (err)
330 return err;
331 udelay(100);
332 err = b44_readphy(bp, MII_BMCR, &val);
333 if (!err) {
334 if (val & BMCR_RESET) {
335 netdev_err(bp->dev, "PHY Reset would not complete\n");
336 err = -ENODEV;
337 }
338 }
339
340 return err;
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 CONFIG_BCM47XX
386 #include <asm/mach-bcm47xx/nvram.h>
387 static void b44_wap54g10_workaround(struct b44 *bp)
388 {
389 char buf[20];
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 if (nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
399 return;
400 if (simple_strtoul(buf, NULL, 0) == 2) {
401 err = __b44_readphy(bp, 0, MII_BMCR, &val);
402 if (err)
403 goto error;
404 if (!(val & BMCR_ISOLATE))
405 return;
406 val &= ~BMCR_ISOLATE;
407 err = __b44_writephy(bp, 0, MII_BMCR, val);
408 if (err)
409 goto error;
410 }
411 return;
412 error:
413 pr_warning("PHY: cannot reset MII transceiver isolate bit\n");
414 }
415 #else
416 static inline void b44_wap54g10_workaround(struct b44 *bp)
417 {
418 }
419 #endif
420
421 static int b44_setup_phy(struct b44 *bp)
422 {
423 u32 val;
424 int err;
425
426 b44_wap54g10_workaround(bp);
427
428 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
429 return 0;
430 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
431 goto out;
432 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
433 val & MII_ALEDCTRL_ALLMSK)) != 0)
434 goto out;
435 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
436 goto out;
437 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
438 val | MII_TLEDCTRL_ENABLE)) != 0)
439 goto out;
440
441 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
442 u32 adv = ADVERTISE_CSMA;
443
444 if (bp->flags & B44_FLAG_ADV_10HALF)
445 adv |= ADVERTISE_10HALF;
446 if (bp->flags & B44_FLAG_ADV_10FULL)
447 adv |= ADVERTISE_10FULL;
448 if (bp->flags & B44_FLAG_ADV_100HALF)
449 adv |= ADVERTISE_100HALF;
450 if (bp->flags & B44_FLAG_ADV_100FULL)
451 adv |= ADVERTISE_100FULL;
452
453 if (bp->flags & B44_FLAG_PAUSE_AUTO)
454 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
455
456 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
457 goto out;
458 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
459 BMCR_ANRESTART))) != 0)
460 goto out;
461 } else {
462 u32 bmcr;
463
464 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
465 goto out;
466 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
467 if (bp->flags & B44_FLAG_100_BASE_T)
468 bmcr |= BMCR_SPEED100;
469 if (bp->flags & B44_FLAG_FULL_DUPLEX)
470 bmcr |= BMCR_FULLDPLX;
471 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
472 goto out;
473
474 /* Since we will not be negotiating there is no safe way
475 * to determine if the link partner supports flow control
476 * or not. So just disable it completely in this case.
477 */
478 b44_set_flow_ctrl(bp, 0, 0);
479 }
480
481 out:
482 return err;
483 }
484
485 static void b44_stats_update(struct b44 *bp)
486 {
487 unsigned long reg;
488 u32 *val;
489
490 val = &bp->hw_stats.tx_good_octets;
491 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
492 *val++ += br32(bp, reg);
493 }
494
495 /* Pad */
496 reg += 8*4UL;
497
498 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
499 *val++ += br32(bp, reg);
500 }
501 }
502
503 static void b44_link_report(struct b44 *bp)
504 {
505 if (!netif_carrier_ok(bp->dev)) {
506 netdev_info(bp->dev, "Link is down\n");
507 } else {
508 netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n",
509 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
510 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
511
512 netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n",
513 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
514 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
515 }
516 }
517
518 static void b44_check_phy(struct b44 *bp)
519 {
520 u32 bmsr, aux;
521
522 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
523 bp->flags |= B44_FLAG_100_BASE_T;
524 bp->flags |= B44_FLAG_FULL_DUPLEX;
525 if (!netif_carrier_ok(bp->dev)) {
526 u32 val = br32(bp, B44_TX_CTRL);
527 val |= TX_CTRL_DUPLEX;
528 bw32(bp, B44_TX_CTRL, val);
529 netif_carrier_on(bp->dev);
530 b44_link_report(bp);
531 }
532 return;
533 }
534
535 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
536 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
537 (bmsr != 0xffff)) {
538 if (aux & MII_AUXCTRL_SPEED)
539 bp->flags |= B44_FLAG_100_BASE_T;
540 else
541 bp->flags &= ~B44_FLAG_100_BASE_T;
542 if (aux & MII_AUXCTRL_DUPLEX)
543 bp->flags |= B44_FLAG_FULL_DUPLEX;
544 else
545 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
546
547 if (!netif_carrier_ok(bp->dev) &&
548 (bmsr & BMSR_LSTATUS)) {
549 u32 val = br32(bp, B44_TX_CTRL);
550 u32 local_adv, remote_adv;
551
552 if (bp->flags & B44_FLAG_FULL_DUPLEX)
553 val |= TX_CTRL_DUPLEX;
554 else
555 val &= ~TX_CTRL_DUPLEX;
556 bw32(bp, B44_TX_CTRL, val);
557
558 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
559 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
560 !b44_readphy(bp, MII_LPA, &remote_adv))
561 b44_set_flow_ctrl(bp, local_adv, remote_adv);
562
563 /* Link now up */
564 netif_carrier_on(bp->dev);
565 b44_link_report(bp);
566 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
567 /* Link now down */
568 netif_carrier_off(bp->dev);
569 b44_link_report(bp);
570 }
571
572 if (bmsr & BMSR_RFAULT)
573 netdev_warn(bp->dev, "Remote fault detected in PHY\n");
574 if (bmsr & BMSR_JCD)
575 netdev_warn(bp->dev, "Jabber detected in PHY\n");
576 }
577 }
578
579 static void b44_timer(unsigned long __opaque)
580 {
581 struct b44 *bp = (struct b44 *) __opaque;
582
583 spin_lock_irq(&bp->lock);
584
585 b44_check_phy(bp);
586
587 b44_stats_update(bp);
588
589 spin_unlock_irq(&bp->lock);
590
591 mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
592 }
593
594 static void b44_tx(struct b44 *bp)
595 {
596 u32 cur, cons;
597
598 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
599 cur /= sizeof(struct dma_desc);
600
601 /* XXX needs updating when NETIF_F_SG is supported */
602 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
603 struct ring_info *rp = &bp->tx_buffers[cons];
604 struct sk_buff *skb = rp->skb;
605
606 BUG_ON(skb == NULL);
607
608 dma_unmap_single(bp->sdev->dma_dev,
609 rp->mapping,
610 skb->len,
611 DMA_TO_DEVICE);
612 rp->skb = NULL;
613 dev_kfree_skb(skb);
614 }
615
616 bp->tx_cons = cons;
617 if (netif_queue_stopped(bp->dev) &&
618 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
619 netif_wake_queue(bp->dev);
620
621 bw32(bp, B44_GPTIMER, 0);
622 }
623
624 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
625 * before the DMA address you give it. So we allocate 30 more bytes
626 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
627 * point the chip at 30 bytes past where the rx_header will go.
628 */
629 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
630 {
631 struct dma_desc *dp;
632 struct ring_info *src_map, *map;
633 struct rx_header *rh;
634 struct sk_buff *skb;
635 dma_addr_t mapping;
636 int dest_idx;
637 u32 ctrl;
638
639 src_map = NULL;
640 if (src_idx >= 0)
641 src_map = &bp->rx_buffers[src_idx];
642 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
643 map = &bp->rx_buffers[dest_idx];
644 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
645 if (skb == NULL)
646 return -ENOMEM;
647
648 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
649 RX_PKT_BUF_SZ,
650 DMA_FROM_DEVICE);
651
652 /* Hardware bug work-around, the chip is unable to do PCI DMA
653 to/from anything above 1GB :-( */
654 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
655 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
656 /* Sigh... */
657 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
658 dma_unmap_single(bp->sdev->dma_dev, mapping,
659 RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
660 dev_kfree_skb_any(skb);
661 skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
662 if (skb == NULL)
663 return -ENOMEM;
664 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
665 RX_PKT_BUF_SZ,
666 DMA_FROM_DEVICE);
667 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
668 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
669 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
670 dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
671 dev_kfree_skb_any(skb);
672 return -ENOMEM;
673 }
674 bp->force_copybreak = 1;
675 }
676
677 rh = (struct rx_header *) skb->data;
678
679 rh->len = 0;
680 rh->flags = 0;
681
682 map->skb = skb;
683 map->mapping = mapping;
684
685 if (src_map != NULL)
686 src_map->skb = NULL;
687
688 ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
689 if (dest_idx == (B44_RX_RING_SIZE - 1))
690 ctrl |= DESC_CTRL_EOT;
691
692 dp = &bp->rx_ring[dest_idx];
693 dp->ctrl = cpu_to_le32(ctrl);
694 dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
695
696 if (bp->flags & B44_FLAG_RX_RING_HACK)
697 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
698 dest_idx * sizeof(*dp),
699 DMA_BIDIRECTIONAL);
700
701 return RX_PKT_BUF_SZ;
702 }
703
704 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
705 {
706 struct dma_desc *src_desc, *dest_desc;
707 struct ring_info *src_map, *dest_map;
708 struct rx_header *rh;
709 int dest_idx;
710 __le32 ctrl;
711
712 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
713 dest_desc = &bp->rx_ring[dest_idx];
714 dest_map = &bp->rx_buffers[dest_idx];
715 src_desc = &bp->rx_ring[src_idx];
716 src_map = &bp->rx_buffers[src_idx];
717
718 dest_map->skb = src_map->skb;
719 rh = (struct rx_header *) src_map->skb->data;
720 rh->len = 0;
721 rh->flags = 0;
722 dest_map->mapping = src_map->mapping;
723
724 if (bp->flags & B44_FLAG_RX_RING_HACK)
725 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
726 src_idx * sizeof(*src_desc),
727 DMA_BIDIRECTIONAL);
728
729 ctrl = src_desc->ctrl;
730 if (dest_idx == (B44_RX_RING_SIZE - 1))
731 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
732 else
733 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
734
735 dest_desc->ctrl = ctrl;
736 dest_desc->addr = src_desc->addr;
737
738 src_map->skb = NULL;
739
740 if (bp->flags & B44_FLAG_RX_RING_HACK)
741 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
742 dest_idx * sizeof(*dest_desc),
743 DMA_BIDIRECTIONAL);
744
745 dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
746 RX_PKT_BUF_SZ,
747 DMA_FROM_DEVICE);
748 }
749
750 static int b44_rx(struct b44 *bp, int budget)
751 {
752 int received;
753 u32 cons, prod;
754
755 received = 0;
756 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
757 prod /= sizeof(struct dma_desc);
758 cons = bp->rx_cons;
759
760 while (cons != prod && budget > 0) {
761 struct ring_info *rp = &bp->rx_buffers[cons];
762 struct sk_buff *skb = rp->skb;
763 dma_addr_t map = rp->mapping;
764 struct rx_header *rh;
765 u16 len;
766
767 dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
768 RX_PKT_BUF_SZ,
769 DMA_FROM_DEVICE);
770 rh = (struct rx_header *) skb->data;
771 len = le16_to_cpu(rh->len);
772 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
773 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
774 drop_it:
775 b44_recycle_rx(bp, cons, bp->rx_prod);
776 drop_it_no_recycle:
777 bp->dev->stats.rx_dropped++;
778 goto next_pkt;
779 }
780
781 if (len == 0) {
782 int i = 0;
783
784 do {
785 udelay(2);
786 barrier();
787 len = le16_to_cpu(rh->len);
788 } while (len == 0 && i++ < 5);
789 if (len == 0)
790 goto drop_it;
791 }
792
793 /* Omit CRC. */
794 len -= 4;
795
796 if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
797 int skb_size;
798 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
799 if (skb_size < 0)
800 goto drop_it;
801 dma_unmap_single(bp->sdev->dma_dev, map,
802 skb_size, DMA_FROM_DEVICE);
803 /* Leave out rx_header */
804 skb_put(skb, len + RX_PKT_OFFSET);
805 skb_pull(skb, RX_PKT_OFFSET);
806 } else {
807 struct sk_buff *copy_skb;
808
809 b44_recycle_rx(bp, cons, bp->rx_prod);
810 copy_skb = netdev_alloc_skb(bp->dev, len + 2);
811 if (copy_skb == NULL)
812 goto drop_it_no_recycle;
813
814 skb_reserve(copy_skb, 2);
815 skb_put(copy_skb, len);
816 /* DMA sync done above, copy just the actual packet */
817 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
818 copy_skb->data, len);
819 skb = copy_skb;
820 }
821 skb_checksum_none_assert(skb);
822 skb->protocol = eth_type_trans(skb, bp->dev);
823 netif_receive_skb(skb);
824 received++;
825 budget--;
826 next_pkt:
827 bp->rx_prod = (bp->rx_prod + 1) &
828 (B44_RX_RING_SIZE - 1);
829 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
830 }
831
832 bp->rx_cons = cons;
833 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
834
835 return received;
836 }
837
838 static int b44_poll(struct napi_struct *napi, int budget)
839 {
840 struct b44 *bp = container_of(napi, struct b44, napi);
841 int work_done;
842 unsigned long flags;
843
844 spin_lock_irqsave(&bp->lock, flags);
845
846 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
847 /* spin_lock(&bp->tx_lock); */
848 b44_tx(bp);
849 /* spin_unlock(&bp->tx_lock); */
850 }
851 if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */
852 bp->istat &= ~ISTAT_RFO;
853 b44_disable_ints(bp);
854 ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
855 b44_init_rings(bp);
856 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
857 netif_wake_queue(bp->dev);
858 }
859
860 spin_unlock_irqrestore(&bp->lock, flags);
861
862 work_done = 0;
863 if (bp->istat & ISTAT_RX)
864 work_done += b44_rx(bp, budget);
865
866 if (bp->istat & ISTAT_ERRORS) {
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 napi_complete(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 netdev_info(dev, "late interrupt\n");
906 goto irq_ack;
907 }
908
909 if (napi_schedule_prep(&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 __napi_schedule(&bp->napi);
916 }
917
918 irq_ack:
919 bw32(bp, B44_ISTAT, istat);
920 br32(bp, B44_ISTAT);
921 }
922 spin_unlock(&bp->lock);
923 return IRQ_RETVAL(handled);
924 }
925
926 static void b44_tx_timeout(struct net_device *dev)
927 {
928 struct b44 *bp = netdev_priv(dev);
929
930 netdev_err(dev, "transmit timed out, resetting\n");
931
932 spin_lock_irq(&bp->lock);
933
934 b44_halt(bp);
935 b44_init_rings(bp);
936 b44_init_hw(bp, B44_FULL_RESET);
937
938 spin_unlock_irq(&bp->lock);
939
940 b44_enable_ints(bp);
941
942 netif_wake_queue(dev);
943 }
944
945 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
946 {
947 struct b44 *bp = netdev_priv(dev);
948 int rc = NETDEV_TX_OK;
949 dma_addr_t mapping;
950 u32 len, entry, ctrl;
951 unsigned long flags;
952
953 len = skb->len;
954 spin_lock_irqsave(&bp->lock, flags);
955
956 /* This is a hard error, log it. */
957 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
958 netif_stop_queue(dev);
959 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
960 goto err_out;
961 }
962
963 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
964 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
965 struct sk_buff *bounce_skb;
966
967 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
968 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
969 dma_unmap_single(bp->sdev->dma_dev, mapping, len,
970 DMA_TO_DEVICE);
971
972 bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
973 if (!bounce_skb)
974 goto err_out;
975
976 mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
977 len, DMA_TO_DEVICE);
978 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
979 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
980 dma_unmap_single(bp->sdev->dma_dev, mapping,
981 len, DMA_TO_DEVICE);
982 dev_kfree_skb_any(bounce_skb);
983 goto err_out;
984 }
985
986 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
987 dev_kfree_skb_any(skb);
988 skb = bounce_skb;
989 }
990
991 entry = bp->tx_prod;
992 bp->tx_buffers[entry].skb = skb;
993 bp->tx_buffers[entry].mapping = mapping;
994
995 ctrl = (len & DESC_CTRL_LEN);
996 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
997 if (entry == (B44_TX_RING_SIZE - 1))
998 ctrl |= DESC_CTRL_EOT;
999
1000 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1001 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1002
1003 if (bp->flags & B44_FLAG_TX_RING_HACK)
1004 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1005 entry * sizeof(bp->tx_ring[0]),
1006 DMA_TO_DEVICE);
1007
1008 entry = NEXT_TX(entry);
1009
1010 bp->tx_prod = entry;
1011
1012 wmb();
1013
1014 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1015 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1016 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1017 if (bp->flags & B44_FLAG_REORDER_BUG)
1018 br32(bp, B44_DMATX_PTR);
1019
1020 if (TX_BUFFS_AVAIL(bp) < 1)
1021 netif_stop_queue(dev);
1022
1023 out_unlock:
1024 spin_unlock_irqrestore(&bp->lock, flags);
1025
1026 return rc;
1027
1028 err_out:
1029 rc = NETDEV_TX_BUSY;
1030 goto out_unlock;
1031 }
1032
1033 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1034 {
1035 struct b44 *bp = netdev_priv(dev);
1036
1037 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1038 return -EINVAL;
1039
1040 if (!netif_running(dev)) {
1041 /* We'll just catch it later when the
1042 * device is up'd.
1043 */
1044 dev->mtu = new_mtu;
1045 return 0;
1046 }
1047
1048 spin_lock_irq(&bp->lock);
1049 b44_halt(bp);
1050 dev->mtu = new_mtu;
1051 b44_init_rings(bp);
1052 b44_init_hw(bp, B44_FULL_RESET);
1053 spin_unlock_irq(&bp->lock);
1054
1055 b44_enable_ints(bp);
1056
1057 return 0;
1058 }
1059
1060 /* Free up pending packets in all rx/tx rings.
1061 *
1062 * The chip has been shut down and the driver detached from
1063 * the networking, so no interrupts or new tx packets will
1064 * end up in the driver. bp->lock is not held and we are not
1065 * in an interrupt context and thus may sleep.
1066 */
1067 static void b44_free_rings(struct b44 *bp)
1068 {
1069 struct ring_info *rp;
1070 int i;
1071
1072 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1073 rp = &bp->rx_buffers[i];
1074
1075 if (rp->skb == NULL)
1076 continue;
1077 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
1078 DMA_FROM_DEVICE);
1079 dev_kfree_skb_any(rp->skb);
1080 rp->skb = NULL;
1081 }
1082
1083 /* XXX needs changes once NETIF_F_SG is set... */
1084 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1085 rp = &bp->tx_buffers[i];
1086
1087 if (rp->skb == NULL)
1088 continue;
1089 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
1090 DMA_TO_DEVICE);
1091 dev_kfree_skb_any(rp->skb);
1092 rp->skb = NULL;
1093 }
1094 }
1095
1096 /* Initialize tx/rx rings for packet processing.
1097 *
1098 * The chip has been shut down and the driver detached from
1099 * the networking, so no interrupts or new tx packets will
1100 * end up in the driver.
1101 */
1102 static void b44_init_rings(struct b44 *bp)
1103 {
1104 int i;
1105
1106 b44_free_rings(bp);
1107
1108 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1109 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1110
1111 if (bp->flags & B44_FLAG_RX_RING_HACK)
1112 dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
1113 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1114
1115 if (bp->flags & B44_FLAG_TX_RING_HACK)
1116 dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
1117 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1118
1119 for (i = 0; i < bp->rx_pending; i++) {
1120 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1121 break;
1122 }
1123 }
1124
1125 /*
1126 * Must not be invoked with interrupt sources disabled and
1127 * the hardware shutdown down.
1128 */
1129 static void b44_free_consistent(struct b44 *bp)
1130 {
1131 kfree(bp->rx_buffers);
1132 bp->rx_buffers = NULL;
1133 kfree(bp->tx_buffers);
1134 bp->tx_buffers = NULL;
1135 if (bp->rx_ring) {
1136 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1137 dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
1138 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1139 kfree(bp->rx_ring);
1140 } else
1141 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1142 bp->rx_ring, bp->rx_ring_dma);
1143 bp->rx_ring = NULL;
1144 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1145 }
1146 if (bp->tx_ring) {
1147 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1148 dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
1149 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1150 kfree(bp->tx_ring);
1151 } else
1152 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1153 bp->tx_ring, bp->tx_ring_dma);
1154 bp->tx_ring = NULL;
1155 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1156 }
1157 }
1158
1159 /*
1160 * Must not be invoked with interrupt sources disabled and
1161 * the hardware shutdown down. Can sleep.
1162 */
1163 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1164 {
1165 int size;
1166
1167 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1168 bp->rx_buffers = kzalloc(size, gfp);
1169 if (!bp->rx_buffers)
1170 goto out_err;
1171
1172 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1173 bp->tx_buffers = kzalloc(size, gfp);
1174 if (!bp->tx_buffers)
1175 goto out_err;
1176
1177 size = DMA_TABLE_BYTES;
1178 bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1179 &bp->rx_ring_dma, gfp);
1180 if (!bp->rx_ring) {
1181 /* Allocation may have failed due to pci_alloc_consistent
1182 insisting on use of GFP_DMA, which is more restrictive
1183 than necessary... */
1184 struct dma_desc *rx_ring;
1185 dma_addr_t rx_ring_dma;
1186
1187 rx_ring = kzalloc(size, gfp);
1188 if (!rx_ring)
1189 goto out_err;
1190
1191 rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
1192 DMA_TABLE_BYTES,
1193 DMA_BIDIRECTIONAL);
1194
1195 if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
1196 rx_ring_dma + size > DMA_BIT_MASK(30)) {
1197 kfree(rx_ring);
1198 goto out_err;
1199 }
1200
1201 bp->rx_ring = rx_ring;
1202 bp->rx_ring_dma = rx_ring_dma;
1203 bp->flags |= B44_FLAG_RX_RING_HACK;
1204 }
1205
1206 bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1207 &bp->tx_ring_dma, gfp);
1208 if (!bp->tx_ring) {
1209 /* Allocation may have failed due to ssb_dma_alloc_consistent
1210 insisting on use of GFP_DMA, which is more restrictive
1211 than necessary... */
1212 struct dma_desc *tx_ring;
1213 dma_addr_t tx_ring_dma;
1214
1215 tx_ring = kzalloc(size, gfp);
1216 if (!tx_ring)
1217 goto out_err;
1218
1219 tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
1220 DMA_TABLE_BYTES,
1221 DMA_TO_DEVICE);
1222
1223 if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
1224 tx_ring_dma + size > DMA_BIT_MASK(30)) {
1225 kfree(tx_ring);
1226 goto out_err;
1227 }
1228
1229 bp->tx_ring = tx_ring;
1230 bp->tx_ring_dma = tx_ring_dma;
1231 bp->flags |= B44_FLAG_TX_RING_HACK;
1232 }
1233
1234 return 0;
1235
1236 out_err:
1237 b44_free_consistent(bp);
1238 return -ENOMEM;
1239 }
1240
1241 /* bp->lock is held. */
1242 static void b44_clear_stats(struct b44 *bp)
1243 {
1244 unsigned long reg;
1245
1246 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1247 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1248 br32(bp, reg);
1249 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1250 br32(bp, reg);
1251 }
1252
1253 /* bp->lock is held. */
1254 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1255 {
1256 struct ssb_device *sdev = bp->sdev;
1257 bool was_enabled;
1258
1259 was_enabled = ssb_device_is_enabled(bp->sdev);
1260
1261 ssb_device_enable(bp->sdev, 0);
1262 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1263
1264 if (was_enabled) {
1265 bw32(bp, B44_RCV_LAZY, 0);
1266 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1267 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1268 bw32(bp, B44_DMATX_CTRL, 0);
1269 bp->tx_prod = bp->tx_cons = 0;
1270 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1271 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1272 100, 0);
1273 }
1274 bw32(bp, B44_DMARX_CTRL, 0);
1275 bp->rx_prod = bp->rx_cons = 0;
1276 }
1277
1278 b44_clear_stats(bp);
1279
1280 /*
1281 * Don't enable PHY if we are doing a partial reset
1282 * we are probably going to power down
1283 */
1284 if (reset_kind == B44_CHIP_RESET_PARTIAL)
1285 return;
1286
1287 switch (sdev->bus->bustype) {
1288 case SSB_BUSTYPE_SSB:
1289 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1290 (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1291 B44_MDC_RATIO)
1292 & MDIO_CTRL_MAXF_MASK)));
1293 break;
1294 case SSB_BUSTYPE_PCI:
1295 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1296 (0x0d & MDIO_CTRL_MAXF_MASK)));
1297 break;
1298 case SSB_BUSTYPE_PCMCIA:
1299 case SSB_BUSTYPE_SDIO:
1300 WARN_ON(1); /* A device with this bus does not exist. */
1301 break;
1302 }
1303
1304 br32(bp, B44_MDIO_CTRL);
1305
1306 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1307 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1308 br32(bp, B44_ENET_CTRL);
1309 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1310 } else {
1311 u32 val = br32(bp, B44_DEVCTRL);
1312
1313 if (val & DEVCTRL_EPR) {
1314 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1315 br32(bp, B44_DEVCTRL);
1316 udelay(100);
1317 }
1318 bp->flags |= B44_FLAG_INTERNAL_PHY;
1319 }
1320 }
1321
1322 /* bp->lock is held. */
1323 static void b44_halt(struct b44 *bp)
1324 {
1325 b44_disable_ints(bp);
1326 /* reset PHY */
1327 b44_phy_reset(bp);
1328 /* power down PHY */
1329 netdev_info(bp->dev, "powering down PHY\n");
1330 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1331 /* now reset the chip, but without enabling the MAC&PHY
1332 * part of it. This has to be done _after_ we shut down the PHY */
1333 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1334 }
1335
1336 /* bp->lock is held. */
1337 static void __b44_set_mac_addr(struct b44 *bp)
1338 {
1339 bw32(bp, B44_CAM_CTRL, 0);
1340 if (!(bp->dev->flags & IFF_PROMISC)) {
1341 u32 val;
1342
1343 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1344 val = br32(bp, B44_CAM_CTRL);
1345 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1346 }
1347 }
1348
1349 static int b44_set_mac_addr(struct net_device *dev, void *p)
1350 {
1351 struct b44 *bp = netdev_priv(dev);
1352 struct sockaddr *addr = p;
1353 u32 val;
1354
1355 if (netif_running(dev))
1356 return -EBUSY;
1357
1358 if (!is_valid_ether_addr(addr->sa_data))
1359 return -EINVAL;
1360
1361 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1362
1363 spin_lock_irq(&bp->lock);
1364
1365 val = br32(bp, B44_RXCONFIG);
1366 if (!(val & RXCONFIG_CAM_ABSENT))
1367 __b44_set_mac_addr(bp);
1368
1369 spin_unlock_irq(&bp->lock);
1370
1371 return 0;
1372 }
1373
1374 /* Called at device open time to get the chip ready for
1375 * packet processing. Invoked with bp->lock held.
1376 */
1377 static void __b44_set_rx_mode(struct net_device *);
1378 static void b44_init_hw(struct b44 *bp, int reset_kind)
1379 {
1380 u32 val;
1381
1382 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1383 if (reset_kind == B44_FULL_RESET) {
1384 b44_phy_reset(bp);
1385 b44_setup_phy(bp);
1386 }
1387
1388 /* Enable CRC32, set proper LED modes and power on PHY */
1389 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1390 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1391
1392 /* This sets the MAC address too. */
1393 __b44_set_rx_mode(bp->dev);
1394
1395 /* MTU + eth header + possible VLAN tag + struct rx_header */
1396 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1397 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1398
1399 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1400 if (reset_kind == B44_PARTIAL_RESET) {
1401 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1402 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1403 } else {
1404 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1405 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1406 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1407 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1408 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1409
1410 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1411 bp->rx_prod = bp->rx_pending;
1412
1413 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1414 }
1415
1416 val = br32(bp, B44_ENET_CTRL);
1417 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1418 }
1419
1420 static int b44_open(struct net_device *dev)
1421 {
1422 struct b44 *bp = netdev_priv(dev);
1423 int err;
1424
1425 err = b44_alloc_consistent(bp, GFP_KERNEL);
1426 if (err)
1427 goto out;
1428
1429 napi_enable(&bp->napi);
1430
1431 b44_init_rings(bp);
1432 b44_init_hw(bp, B44_FULL_RESET);
1433
1434 b44_check_phy(bp);
1435
1436 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1437 if (unlikely(err < 0)) {
1438 napi_disable(&bp->napi);
1439 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1440 b44_free_rings(bp);
1441 b44_free_consistent(bp);
1442 goto out;
1443 }
1444
1445 init_timer(&bp->timer);
1446 bp->timer.expires = jiffies + HZ;
1447 bp->timer.data = (unsigned long) bp;
1448 bp->timer.function = b44_timer;
1449 add_timer(&bp->timer);
1450
1451 b44_enable_ints(bp);
1452 netif_start_queue(dev);
1453 out:
1454 return err;
1455 }
1456
1457 #ifdef CONFIG_NET_POLL_CONTROLLER
1458 /*
1459 * Polling receive - used by netconsole and other diagnostic tools
1460 * to allow network i/o with interrupts disabled.
1461 */
1462 static void b44_poll_controller(struct net_device *dev)
1463 {
1464 disable_irq(dev->irq);
1465 b44_interrupt(dev->irq, dev);
1466 enable_irq(dev->irq);
1467 }
1468 #endif
1469
1470 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1471 {
1472 u32 i;
1473 u32 *pattern = (u32 *) pp;
1474
1475 for (i = 0; i < bytes; i += sizeof(u32)) {
1476 bw32(bp, B44_FILT_ADDR, table_offset + i);
1477 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1478 }
1479 }
1480
1481 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1482 {
1483 int magicsync = 6;
1484 int k, j, len = offset;
1485 int ethaddr_bytes = ETH_ALEN;
1486
1487 memset(ppattern + offset, 0xff, magicsync);
1488 for (j = 0; j < magicsync; j++)
1489 set_bit(len++, (unsigned long *) pmask);
1490
1491 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1492 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1493 ethaddr_bytes = ETH_ALEN;
1494 else
1495 ethaddr_bytes = B44_PATTERN_SIZE - len;
1496 if (ethaddr_bytes <=0)
1497 break;
1498 for (k = 0; k< ethaddr_bytes; k++) {
1499 ppattern[offset + magicsync +
1500 (j * ETH_ALEN) + k] = macaddr[k];
1501 set_bit(len++, (unsigned long *) pmask);
1502 }
1503 }
1504 return len - 1;
1505 }
1506
1507 /* Setup magic packet patterns in the b44 WOL
1508 * pattern matching filter.
1509 */
1510 static void b44_setup_pseudo_magicp(struct b44 *bp)
1511 {
1512
1513 u32 val;
1514 int plen0, plen1, plen2;
1515 u8 *pwol_pattern;
1516 u8 pwol_mask[B44_PMASK_SIZE];
1517
1518 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1519 if (!pwol_pattern) {
1520 pr_err("Memory not available for WOL\n");
1521 return;
1522 }
1523
1524 /* Ipv4 magic packet pattern - pattern 0.*/
1525 memset(pwol_mask, 0, B44_PMASK_SIZE);
1526 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1527 B44_ETHIPV4UDP_HLEN);
1528
1529 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1530 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1531
1532 /* Raw ethernet II magic packet pattern - pattern 1 */
1533 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1534 memset(pwol_mask, 0, B44_PMASK_SIZE);
1535 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1536 ETH_HLEN);
1537
1538 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1539 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1540 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1541 B44_PMASK_BASE + B44_PMASK_SIZE);
1542
1543 /* Ipv6 magic packet pattern - pattern 2 */
1544 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1545 memset(pwol_mask, 0, B44_PMASK_SIZE);
1546 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1547 B44_ETHIPV6UDP_HLEN);
1548
1549 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1550 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1551 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1552 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1553
1554 kfree(pwol_pattern);
1555
1556 /* set these pattern's lengths: one less than each real length */
1557 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1558 bw32(bp, B44_WKUP_LEN, val);
1559
1560 /* enable wakeup pattern matching */
1561 val = br32(bp, B44_DEVCTRL);
1562 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1563
1564 }
1565
1566 #ifdef CONFIG_B44_PCI
1567 static void b44_setup_wol_pci(struct b44 *bp)
1568 {
1569 u16 val;
1570
1571 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1572 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1573 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1574 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1575 }
1576 }
1577 #else
1578 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1579 #endif /* CONFIG_B44_PCI */
1580
1581 static void b44_setup_wol(struct b44 *bp)
1582 {
1583 u32 val;
1584
1585 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1586
1587 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1588
1589 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1590
1591 val = bp->dev->dev_addr[2] << 24 |
1592 bp->dev->dev_addr[3] << 16 |
1593 bp->dev->dev_addr[4] << 8 |
1594 bp->dev->dev_addr[5];
1595 bw32(bp, B44_ADDR_LO, val);
1596
1597 val = bp->dev->dev_addr[0] << 8 |
1598 bp->dev->dev_addr[1];
1599 bw32(bp, B44_ADDR_HI, val);
1600
1601 val = br32(bp, B44_DEVCTRL);
1602 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1603
1604 } else {
1605 b44_setup_pseudo_magicp(bp);
1606 }
1607 b44_setup_wol_pci(bp);
1608 }
1609
1610 static int b44_close(struct net_device *dev)
1611 {
1612 struct b44 *bp = netdev_priv(dev);
1613
1614 netif_stop_queue(dev);
1615
1616 napi_disable(&bp->napi);
1617
1618 del_timer_sync(&bp->timer);
1619
1620 spin_lock_irq(&bp->lock);
1621
1622 b44_halt(bp);
1623 b44_free_rings(bp);
1624 netif_carrier_off(dev);
1625
1626 spin_unlock_irq(&bp->lock);
1627
1628 free_irq(dev->irq, dev);
1629
1630 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1631 b44_init_hw(bp, B44_PARTIAL_RESET);
1632 b44_setup_wol(bp);
1633 }
1634
1635 b44_free_consistent(bp);
1636
1637 return 0;
1638 }
1639
1640 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1641 {
1642 struct b44 *bp = netdev_priv(dev);
1643 struct net_device_stats *nstat = &dev->stats;
1644 struct b44_hw_stats *hwstat = &bp->hw_stats;
1645
1646 /* Convert HW stats into netdevice stats. */
1647 nstat->rx_packets = hwstat->rx_pkts;
1648 nstat->tx_packets = hwstat->tx_pkts;
1649 nstat->rx_bytes = hwstat->rx_octets;
1650 nstat->tx_bytes = hwstat->tx_octets;
1651 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1652 hwstat->tx_oversize_pkts +
1653 hwstat->tx_underruns +
1654 hwstat->tx_excessive_cols +
1655 hwstat->tx_late_cols);
1656 nstat->multicast = hwstat->tx_multicast_pkts;
1657 nstat->collisions = hwstat->tx_total_cols;
1658
1659 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1660 hwstat->rx_undersize);
1661 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1662 nstat->rx_frame_errors = hwstat->rx_align_errs;
1663 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1664 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1665 hwstat->rx_oversize_pkts +
1666 hwstat->rx_missed_pkts +
1667 hwstat->rx_crc_align_errs +
1668 hwstat->rx_undersize +
1669 hwstat->rx_crc_errs +
1670 hwstat->rx_align_errs +
1671 hwstat->rx_symbol_errs);
1672
1673 nstat->tx_aborted_errors = hwstat->tx_underruns;
1674 #if 0
1675 /* Carrier lost counter seems to be broken for some devices */
1676 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1677 #endif
1678
1679 return nstat;
1680 }
1681
1682 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1683 {
1684 struct netdev_hw_addr *ha;
1685 int i, num_ents;
1686
1687 num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
1688 i = 0;
1689 netdev_for_each_mc_addr(ha, dev) {
1690 if (i == num_ents)
1691 break;
1692 __b44_cam_write(bp, ha->addr, i++ + 1);
1693 }
1694 return i+1;
1695 }
1696
1697 static void __b44_set_rx_mode(struct net_device *dev)
1698 {
1699 struct b44 *bp = netdev_priv(dev);
1700 u32 val;
1701
1702 val = br32(bp, B44_RXCONFIG);
1703 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1704 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1705 val |= RXCONFIG_PROMISC;
1706 bw32(bp, B44_RXCONFIG, val);
1707 } else {
1708 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1709 int i = 1;
1710
1711 __b44_set_mac_addr(bp);
1712
1713 if ((dev->flags & IFF_ALLMULTI) ||
1714 (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
1715 val |= RXCONFIG_ALLMULTI;
1716 else
1717 i = __b44_load_mcast(bp, dev);
1718
1719 for (; i < 64; i++)
1720 __b44_cam_write(bp, zero, i);
1721
1722 bw32(bp, B44_RXCONFIG, val);
1723 val = br32(bp, B44_CAM_CTRL);
1724 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1725 }
1726 }
1727
1728 static void b44_set_rx_mode(struct net_device *dev)
1729 {
1730 struct b44 *bp = netdev_priv(dev);
1731
1732 spin_lock_irq(&bp->lock);
1733 __b44_set_rx_mode(dev);
1734 spin_unlock_irq(&bp->lock);
1735 }
1736
1737 static u32 b44_get_msglevel(struct net_device *dev)
1738 {
1739 struct b44 *bp = netdev_priv(dev);
1740 return bp->msg_enable;
1741 }
1742
1743 static void b44_set_msglevel(struct net_device *dev, u32 value)
1744 {
1745 struct b44 *bp = netdev_priv(dev);
1746 bp->msg_enable = value;
1747 }
1748
1749 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1750 {
1751 struct b44 *bp = netdev_priv(dev);
1752 struct ssb_bus *bus = bp->sdev->bus;
1753
1754 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1755 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
1756 switch (bus->bustype) {
1757 case SSB_BUSTYPE_PCI:
1758 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1759 break;
1760 case SSB_BUSTYPE_SSB:
1761 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
1762 break;
1763 case SSB_BUSTYPE_PCMCIA:
1764 case SSB_BUSTYPE_SDIO:
1765 WARN_ON(1); /* A device with this bus does not exist. */
1766 break;
1767 }
1768 }
1769
1770 static int b44_nway_reset(struct net_device *dev)
1771 {
1772 struct b44 *bp = netdev_priv(dev);
1773 u32 bmcr;
1774 int r;
1775
1776 spin_lock_irq(&bp->lock);
1777 b44_readphy(bp, MII_BMCR, &bmcr);
1778 b44_readphy(bp, MII_BMCR, &bmcr);
1779 r = -EINVAL;
1780 if (bmcr & BMCR_ANENABLE) {
1781 b44_writephy(bp, MII_BMCR,
1782 bmcr | BMCR_ANRESTART);
1783 r = 0;
1784 }
1785 spin_unlock_irq(&bp->lock);
1786
1787 return r;
1788 }
1789
1790 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1791 {
1792 struct b44 *bp = netdev_priv(dev);
1793
1794 cmd->supported = (SUPPORTED_Autoneg);
1795 cmd->supported |= (SUPPORTED_100baseT_Half |
1796 SUPPORTED_100baseT_Full |
1797 SUPPORTED_10baseT_Half |
1798 SUPPORTED_10baseT_Full |
1799 SUPPORTED_MII);
1800
1801 cmd->advertising = 0;
1802 if (bp->flags & B44_FLAG_ADV_10HALF)
1803 cmd->advertising |= ADVERTISED_10baseT_Half;
1804 if (bp->flags & B44_FLAG_ADV_10FULL)
1805 cmd->advertising |= ADVERTISED_10baseT_Full;
1806 if (bp->flags & B44_FLAG_ADV_100HALF)
1807 cmd->advertising |= ADVERTISED_100baseT_Half;
1808 if (bp->flags & B44_FLAG_ADV_100FULL)
1809 cmd->advertising |= ADVERTISED_100baseT_Full;
1810 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1811 ethtool_cmd_speed_set(cmd, ((bp->flags & B44_FLAG_100_BASE_T) ?
1812 SPEED_100 : SPEED_10));
1813 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1814 DUPLEX_FULL : DUPLEX_HALF;
1815 cmd->port = 0;
1816 cmd->phy_address = bp->phy_addr;
1817 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1818 XCVR_INTERNAL : XCVR_EXTERNAL;
1819 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1820 AUTONEG_DISABLE : AUTONEG_ENABLE;
1821 if (cmd->autoneg == AUTONEG_ENABLE)
1822 cmd->advertising |= ADVERTISED_Autoneg;
1823 if (!netif_running(dev)){
1824 ethtool_cmd_speed_set(cmd, 0);
1825 cmd->duplex = 0xff;
1826 }
1827 cmd->maxtxpkt = 0;
1828 cmd->maxrxpkt = 0;
1829 return 0;
1830 }
1831
1832 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1833 {
1834 struct b44 *bp = netdev_priv(dev);
1835 u32 speed = ethtool_cmd_speed(cmd);
1836
1837 /* We do not support gigabit. */
1838 if (cmd->autoneg == AUTONEG_ENABLE) {
1839 if (cmd->advertising &
1840 (ADVERTISED_1000baseT_Half |
1841 ADVERTISED_1000baseT_Full))
1842 return -EINVAL;
1843 } else if ((speed != SPEED_100 &&
1844 speed != SPEED_10) ||
1845 (cmd->duplex != DUPLEX_HALF &&
1846 cmd->duplex != DUPLEX_FULL)) {
1847 return -EINVAL;
1848 }
1849
1850 spin_lock_irq(&bp->lock);
1851
1852 if (cmd->autoneg == AUTONEG_ENABLE) {
1853 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1854 B44_FLAG_100_BASE_T |
1855 B44_FLAG_FULL_DUPLEX |
1856 B44_FLAG_ADV_10HALF |
1857 B44_FLAG_ADV_10FULL |
1858 B44_FLAG_ADV_100HALF |
1859 B44_FLAG_ADV_100FULL);
1860 if (cmd->advertising == 0) {
1861 bp->flags |= (B44_FLAG_ADV_10HALF |
1862 B44_FLAG_ADV_10FULL |
1863 B44_FLAG_ADV_100HALF |
1864 B44_FLAG_ADV_100FULL);
1865 } else {
1866 if (cmd->advertising & ADVERTISED_10baseT_Half)
1867 bp->flags |= B44_FLAG_ADV_10HALF;
1868 if (cmd->advertising & ADVERTISED_10baseT_Full)
1869 bp->flags |= B44_FLAG_ADV_10FULL;
1870 if (cmd->advertising & ADVERTISED_100baseT_Half)
1871 bp->flags |= B44_FLAG_ADV_100HALF;
1872 if (cmd->advertising & ADVERTISED_100baseT_Full)
1873 bp->flags |= B44_FLAG_ADV_100FULL;
1874 }
1875 } else {
1876 bp->flags |= B44_FLAG_FORCE_LINK;
1877 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1878 if (speed == SPEED_100)
1879 bp->flags |= B44_FLAG_100_BASE_T;
1880 if (cmd->duplex == DUPLEX_FULL)
1881 bp->flags |= B44_FLAG_FULL_DUPLEX;
1882 }
1883
1884 if (netif_running(dev))
1885 b44_setup_phy(bp);
1886
1887 spin_unlock_irq(&bp->lock);
1888
1889 return 0;
1890 }
1891
1892 static void b44_get_ringparam(struct net_device *dev,
1893 struct ethtool_ringparam *ering)
1894 {
1895 struct b44 *bp = netdev_priv(dev);
1896
1897 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1898 ering->rx_pending = bp->rx_pending;
1899
1900 /* XXX ethtool lacks a tx_max_pending, oops... */
1901 }
1902
1903 static int b44_set_ringparam(struct net_device *dev,
1904 struct ethtool_ringparam *ering)
1905 {
1906 struct b44 *bp = netdev_priv(dev);
1907
1908 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1909 (ering->rx_mini_pending != 0) ||
1910 (ering->rx_jumbo_pending != 0) ||
1911 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1912 return -EINVAL;
1913
1914 spin_lock_irq(&bp->lock);
1915
1916 bp->rx_pending = ering->rx_pending;
1917 bp->tx_pending = ering->tx_pending;
1918
1919 b44_halt(bp);
1920 b44_init_rings(bp);
1921 b44_init_hw(bp, B44_FULL_RESET);
1922 netif_wake_queue(bp->dev);
1923 spin_unlock_irq(&bp->lock);
1924
1925 b44_enable_ints(bp);
1926
1927 return 0;
1928 }
1929
1930 static void b44_get_pauseparam(struct net_device *dev,
1931 struct ethtool_pauseparam *epause)
1932 {
1933 struct b44 *bp = netdev_priv(dev);
1934
1935 epause->autoneg =
1936 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1937 epause->rx_pause =
1938 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1939 epause->tx_pause =
1940 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1941 }
1942
1943 static int b44_set_pauseparam(struct net_device *dev,
1944 struct ethtool_pauseparam *epause)
1945 {
1946 struct b44 *bp = netdev_priv(dev);
1947
1948 spin_lock_irq(&bp->lock);
1949 if (epause->autoneg)
1950 bp->flags |= B44_FLAG_PAUSE_AUTO;
1951 else
1952 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1953 if (epause->rx_pause)
1954 bp->flags |= B44_FLAG_RX_PAUSE;
1955 else
1956 bp->flags &= ~B44_FLAG_RX_PAUSE;
1957 if (epause->tx_pause)
1958 bp->flags |= B44_FLAG_TX_PAUSE;
1959 else
1960 bp->flags &= ~B44_FLAG_TX_PAUSE;
1961 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1962 b44_halt(bp);
1963 b44_init_rings(bp);
1964 b44_init_hw(bp, B44_FULL_RESET);
1965 } else {
1966 __b44_set_flow_ctrl(bp, bp->flags);
1967 }
1968 spin_unlock_irq(&bp->lock);
1969
1970 b44_enable_ints(bp);
1971
1972 return 0;
1973 }
1974
1975 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1976 {
1977 switch(stringset) {
1978 case ETH_SS_STATS:
1979 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1980 break;
1981 }
1982 }
1983
1984 static int b44_get_sset_count(struct net_device *dev, int sset)
1985 {
1986 switch (sset) {
1987 case ETH_SS_STATS:
1988 return ARRAY_SIZE(b44_gstrings);
1989 default:
1990 return -EOPNOTSUPP;
1991 }
1992 }
1993
1994 static void b44_get_ethtool_stats(struct net_device *dev,
1995 struct ethtool_stats *stats, u64 *data)
1996 {
1997 struct b44 *bp = netdev_priv(dev);
1998 u32 *val = &bp->hw_stats.tx_good_octets;
1999 u32 i;
2000
2001 spin_lock_irq(&bp->lock);
2002
2003 b44_stats_update(bp);
2004
2005 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2006 *data++ = *val++;
2007
2008 spin_unlock_irq(&bp->lock);
2009 }
2010
2011 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2012 {
2013 struct b44 *bp = netdev_priv(dev);
2014
2015 wol->supported = WAKE_MAGIC;
2016 if (bp->flags & B44_FLAG_WOL_ENABLE)
2017 wol->wolopts = WAKE_MAGIC;
2018 else
2019 wol->wolopts = 0;
2020 memset(&wol->sopass, 0, sizeof(wol->sopass));
2021 }
2022
2023 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2024 {
2025 struct b44 *bp = netdev_priv(dev);
2026
2027 spin_lock_irq(&bp->lock);
2028 if (wol->wolopts & WAKE_MAGIC)
2029 bp->flags |= B44_FLAG_WOL_ENABLE;
2030 else
2031 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2032 spin_unlock_irq(&bp->lock);
2033
2034 return 0;
2035 }
2036
2037 static const struct ethtool_ops b44_ethtool_ops = {
2038 .get_drvinfo = b44_get_drvinfo,
2039 .get_settings = b44_get_settings,
2040 .set_settings = b44_set_settings,
2041 .nway_reset = b44_nway_reset,
2042 .get_link = ethtool_op_get_link,
2043 .get_wol = b44_get_wol,
2044 .set_wol = b44_set_wol,
2045 .get_ringparam = b44_get_ringparam,
2046 .set_ringparam = b44_set_ringparam,
2047 .get_pauseparam = b44_get_pauseparam,
2048 .set_pauseparam = b44_set_pauseparam,
2049 .get_msglevel = b44_get_msglevel,
2050 .set_msglevel = b44_set_msglevel,
2051 .get_strings = b44_get_strings,
2052 .get_sset_count = b44_get_sset_count,
2053 .get_ethtool_stats = b44_get_ethtool_stats,
2054 };
2055
2056 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2057 {
2058 struct mii_ioctl_data *data = if_mii(ifr);
2059 struct b44 *bp = netdev_priv(dev);
2060 int err = -EINVAL;
2061
2062 if (!netif_running(dev))
2063 goto out;
2064
2065 spin_lock_irq(&bp->lock);
2066 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2067 spin_unlock_irq(&bp->lock);
2068 out:
2069 return err;
2070 }
2071
2072 static int __devinit b44_get_invariants(struct b44 *bp)
2073 {
2074 struct ssb_device *sdev = bp->sdev;
2075 int err = 0;
2076 u8 *addr;
2077
2078 bp->dma_offset = ssb_dma_translation(sdev);
2079
2080 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2081 instance > 1) {
2082 addr = sdev->bus->sprom.et1mac;
2083 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2084 } else {
2085 addr = sdev->bus->sprom.et0mac;
2086 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2087 }
2088 /* Some ROMs have buggy PHY addresses with the high
2089 * bits set (sign extension?). Truncate them to a
2090 * valid PHY address. */
2091 bp->phy_addr &= 0x1F;
2092
2093 memcpy(bp->dev->dev_addr, addr, 6);
2094
2095 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2096 pr_err("Invalid MAC address found in EEPROM\n");
2097 return -EINVAL;
2098 }
2099
2100 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2101
2102 bp->imask = IMASK_DEF;
2103
2104 /* XXX - really required?
2105 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2106 */
2107
2108 if (bp->sdev->id.revision >= 7)
2109 bp->flags |= B44_FLAG_B0_ANDLATER;
2110
2111 return err;
2112 }
2113
2114 static const struct net_device_ops b44_netdev_ops = {
2115 .ndo_open = b44_open,
2116 .ndo_stop = b44_close,
2117 .ndo_start_xmit = b44_start_xmit,
2118 .ndo_get_stats = b44_get_stats,
2119 .ndo_set_multicast_list = b44_set_rx_mode,
2120 .ndo_set_mac_address = b44_set_mac_addr,
2121 .ndo_validate_addr = eth_validate_addr,
2122 .ndo_do_ioctl = b44_ioctl,
2123 .ndo_tx_timeout = b44_tx_timeout,
2124 .ndo_change_mtu = b44_change_mtu,
2125 #ifdef CONFIG_NET_POLL_CONTROLLER
2126 .ndo_poll_controller = b44_poll_controller,
2127 #endif
2128 };
2129
2130 static int __devinit b44_init_one(struct ssb_device *sdev,
2131 const struct ssb_device_id *ent)
2132 {
2133 static int b44_version_printed = 0;
2134 struct net_device *dev;
2135 struct b44 *bp;
2136 int err;
2137
2138 instance++;
2139
2140 if (b44_version_printed++ == 0)
2141 pr_info("%s", version);
2142
2143
2144 dev = alloc_etherdev(sizeof(*bp));
2145 if (!dev) {
2146 dev_err(sdev->dev, "Etherdev alloc failed, aborting\n");
2147 err = -ENOMEM;
2148 goto out;
2149 }
2150
2151 SET_NETDEV_DEV(dev, sdev->dev);
2152
2153 /* No interesting netdevice features in this card... */
2154 dev->features |= 0;
2155
2156 bp = netdev_priv(dev);
2157 bp->sdev = sdev;
2158 bp->dev = dev;
2159 bp->force_copybreak = 0;
2160
2161 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2162
2163 spin_lock_init(&bp->lock);
2164
2165 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2166 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2167
2168 dev->netdev_ops = &b44_netdev_ops;
2169 netif_napi_add(dev, &bp->napi, b44_poll, 64);
2170 dev->watchdog_timeo = B44_TX_TIMEOUT;
2171 dev->irq = sdev->irq;
2172 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2173
2174 err = ssb_bus_powerup(sdev->bus, 0);
2175 if (err) {
2176 dev_err(sdev->dev,
2177 "Failed to powerup the bus\n");
2178 goto err_out_free_dev;
2179 }
2180
2181 if (dma_set_mask(sdev->dma_dev, DMA_BIT_MASK(30)) ||
2182 dma_set_coherent_mask(sdev->dma_dev, DMA_BIT_MASK(30))) {
2183 dev_err(sdev->dev,
2184 "Required 30BIT DMA mask unsupported by the system\n");
2185 goto err_out_powerdown;
2186 }
2187
2188 err = b44_get_invariants(bp);
2189 if (err) {
2190 dev_err(sdev->dev,
2191 "Problem fetching invariants of chip, aborting\n");
2192 goto err_out_powerdown;
2193 }
2194
2195 bp->mii_if.dev = dev;
2196 bp->mii_if.mdio_read = b44_mii_read;
2197 bp->mii_if.mdio_write = b44_mii_write;
2198 bp->mii_if.phy_id = bp->phy_addr;
2199 bp->mii_if.phy_id_mask = 0x1f;
2200 bp->mii_if.reg_num_mask = 0x1f;
2201
2202 /* By default, advertise all speed/duplex settings. */
2203 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2204 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2205
2206 /* By default, auto-negotiate PAUSE. */
2207 bp->flags |= B44_FLAG_PAUSE_AUTO;
2208
2209 err = register_netdev(dev);
2210 if (err) {
2211 dev_err(sdev->dev, "Cannot register net device, aborting\n");
2212 goto err_out_powerdown;
2213 }
2214
2215 netif_carrier_off(dev);
2216
2217 ssb_set_drvdata(sdev, dev);
2218
2219 /* Chip reset provides power to the b44 MAC & PCI cores, which
2220 * is necessary for MAC register access.
2221 */
2222 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2223
2224 /* do a phy reset to test if there is an active phy */
2225 if (b44_phy_reset(bp) < 0)
2226 bp->phy_addr = B44_PHY_ADDR_NO_PHY;
2227
2228 netdev_info(dev, "Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2229 dev->dev_addr);
2230
2231 return 0;
2232
2233 err_out_powerdown:
2234 ssb_bus_may_powerdown(sdev->bus);
2235
2236 err_out_free_dev:
2237 free_netdev(dev);
2238
2239 out:
2240 return err;
2241 }
2242
2243 static void __devexit b44_remove_one(struct ssb_device *sdev)
2244 {
2245 struct net_device *dev = ssb_get_drvdata(sdev);
2246
2247 unregister_netdev(dev);
2248 ssb_device_disable(sdev, 0);
2249 ssb_bus_may_powerdown(sdev->bus);
2250 free_netdev(dev);
2251 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2252 ssb_set_drvdata(sdev, NULL);
2253 }
2254
2255 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2256 {
2257 struct net_device *dev = ssb_get_drvdata(sdev);
2258 struct b44 *bp = netdev_priv(dev);
2259
2260 if (!netif_running(dev))
2261 return 0;
2262
2263 del_timer_sync(&bp->timer);
2264
2265 spin_lock_irq(&bp->lock);
2266
2267 b44_halt(bp);
2268 netif_carrier_off(bp->dev);
2269 netif_device_detach(bp->dev);
2270 b44_free_rings(bp);
2271
2272 spin_unlock_irq(&bp->lock);
2273
2274 free_irq(dev->irq, dev);
2275 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2276 b44_init_hw(bp, B44_PARTIAL_RESET);
2277 b44_setup_wol(bp);
2278 }
2279
2280 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2281 return 0;
2282 }
2283
2284 static int b44_resume(struct ssb_device *sdev)
2285 {
2286 struct net_device *dev = ssb_get_drvdata(sdev);
2287 struct b44 *bp = netdev_priv(dev);
2288 int rc = 0;
2289
2290 rc = ssb_bus_powerup(sdev->bus, 0);
2291 if (rc) {
2292 dev_err(sdev->dev,
2293 "Failed to powerup the bus\n");
2294 return rc;
2295 }
2296
2297 if (!netif_running(dev))
2298 return 0;
2299
2300 spin_lock_irq(&bp->lock);
2301 b44_init_rings(bp);
2302 b44_init_hw(bp, B44_FULL_RESET);
2303 spin_unlock_irq(&bp->lock);
2304
2305 /*
2306 * As a shared interrupt, the handler can be called immediately. To be
2307 * able to check the interrupt status the hardware must already be
2308 * powered back on (b44_init_hw).
2309 */
2310 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2311 if (rc) {
2312 netdev_err(dev, "request_irq failed\n");
2313 spin_lock_irq(&bp->lock);
2314 b44_halt(bp);
2315 b44_free_rings(bp);
2316 spin_unlock_irq(&bp->lock);
2317 return rc;
2318 }
2319
2320 netif_device_attach(bp->dev);
2321
2322 b44_enable_ints(bp);
2323 netif_wake_queue(dev);
2324
2325 mod_timer(&bp->timer, jiffies + 1);
2326
2327 return 0;
2328 }
2329
2330 static struct ssb_driver b44_ssb_driver = {
2331 .name = DRV_MODULE_NAME,
2332 .id_table = b44_ssb_tbl,
2333 .probe = b44_init_one,
2334 .remove = __devexit_p(b44_remove_one),
2335 .suspend = b44_suspend,
2336 .resume = b44_resume,
2337 };
2338
2339 static inline int __init b44_pci_init(void)
2340 {
2341 int err = 0;
2342 #ifdef CONFIG_B44_PCI
2343 err = ssb_pcihost_register(&b44_pci_driver);
2344 #endif
2345 return err;
2346 }
2347
2348 static inline void __exit b44_pci_exit(void)
2349 {
2350 #ifdef CONFIG_B44_PCI
2351 ssb_pcihost_unregister(&b44_pci_driver);
2352 #endif
2353 }
2354
2355 static int __init b44_init(void)
2356 {
2357 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2358 int err;
2359
2360 /* Setup paramaters for syncing RX/TX DMA descriptors */
2361 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2362
2363 err = b44_pci_init();
2364 if (err)
2365 return err;
2366 err = ssb_driver_register(&b44_ssb_driver);
2367 if (err)
2368 b44_pci_exit();
2369 return err;
2370 }
2371
2372 static void __exit b44_cleanup(void)
2373 {
2374 ssb_driver_unregister(&b44_ssb_driver);
2375 b44_pci_exit();
2376 }
2377
2378 module_init(b44_init);
2379 module_exit(b44_cleanup);
2380
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree