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[PATCH] Implement get / set tso for forcedeth driver
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / b44.c
blobd8233e0b789952c9047e2b7158e0f291b9efe772
1 /* b44.c: Broadcom 4400 device driver.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 * Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
5 * Copyright (C) 2006 Broadcom Corporation.
6 *
7 * Distribute under GPL.
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/types.h>
14 #include <linux/netdevice.h>
15 #include <linux/ethtool.h>
16 #include <linux/mii.h>
17 #include <linux/if_ether.h>
18 #include <linux/etherdevice.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/init.h>
22 #include <linux/dma-mapping.h>
23
24 #include <asm/uaccess.h>
25 #include <asm/io.h>
26 #include <asm/irq.h>
27
28 #include "b44.h"
29
30 #define DRV_MODULE_NAME "b44"
31 #define PFX DRV_MODULE_NAME ": "
32 #define DRV_MODULE_VERSION "1.00"
33 #define DRV_MODULE_RELDATE "Apr 7, 2006"
34
35 #define B44_DEF_MSG_ENABLE \
36 (NETIF_MSG_DRV | \
37 NETIF_MSG_PROBE | \
38 NETIF_MSG_LINK | \
39 NETIF_MSG_TIMER | \
40 NETIF_MSG_IFDOWN | \
41 NETIF_MSG_IFUP | \
42 NETIF_MSG_RX_ERR | \
43 NETIF_MSG_TX_ERR)
44
45 /* length of time before we decide the hardware is borked,
46 * and dev->tx_timeout() should be called to fix the problem
47 */
48 #define B44_TX_TIMEOUT (5 * HZ)
49
50 /* hardware minimum and maximum for a single frame's data payload */
51 #define B44_MIN_MTU 60
52 #define B44_MAX_MTU 1500
53
54 #define B44_RX_RING_SIZE 512
55 #define B44_DEF_RX_RING_PENDING 200
56 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
57 B44_RX_RING_SIZE)
58 #define B44_TX_RING_SIZE 512
59 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
60 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
61 B44_TX_RING_SIZE)
62 #define B44_DMA_MASK 0x3fffffff
63
64 #define TX_RING_GAP(BP) \
65 (B44_TX_RING_SIZE - (BP)->tx_pending)
66 #define TX_BUFFS_AVAIL(BP) \
67 (((BP)->tx_cons <= (BP)->tx_prod) ? \
68 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
69 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
70 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
71
72 #define RX_PKT_BUF_SZ (1536 + bp->rx_offset + 64)
73 #define TX_PKT_BUF_SZ (B44_MAX_MTU + ETH_HLEN + 8)
74
75 /* minimum number of free TX descriptors required to wake up TX process */
76 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
77
78 static char version[] __devinitdata =
79 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
80
81 MODULE_AUTHOR("Florian Schirmer, Pekka Pietikainen, David S. Miller");
82 MODULE_DESCRIPTION("Broadcom 4400 10/100 PCI ethernet driver");
83 MODULE_LICENSE("GPL");
84 MODULE_VERSION(DRV_MODULE_VERSION);
85
86 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
87 module_param(b44_debug, int, 0);
88 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
89
90 static struct pci_device_id b44_pci_tbl[] = {
91 { PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401,
92 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
93 { PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0,
94 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
95 { PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1,
96 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
97 { } /* terminate list with empty entry */
98 };
99
100 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
101
102 static void b44_halt(struct b44 *);
103 static void b44_init_rings(struct b44 *);
104 static void b44_init_hw(struct b44 *);
105
106 static int dma_desc_align_mask;
107 static int dma_desc_sync_size;
108
109 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
110 #define _B44(x...) # x,
111 B44_STAT_REG_DECLARE
112 #undef _B44
113 };
114
115 static inline void b44_sync_dma_desc_for_device(struct pci_dev *pdev,
116 dma_addr_t dma_base,
117 unsigned long offset,
118 enum dma_data_direction dir)
119 {
120 dma_sync_single_range_for_device(&pdev->dev, dma_base,
121 offset & dma_desc_align_mask,
122 dma_desc_sync_size, dir);
123 }
124
125 static inline void b44_sync_dma_desc_for_cpu(struct pci_dev *pdev,
126 dma_addr_t dma_base,
127 unsigned long offset,
128 enum dma_data_direction dir)
129 {
130 dma_sync_single_range_for_cpu(&pdev->dev, dma_base,
131 offset & dma_desc_align_mask,
132 dma_desc_sync_size, dir);
133 }
134
135 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
136 {
137 return readl(bp->regs + reg);
138 }
139
140 static inline void bw32(const struct b44 *bp,
141 unsigned long reg, unsigned long val)
142 {
143 writel(val, bp->regs + reg);
144 }
145
146 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
147 u32 bit, unsigned long timeout, const int clear)
148 {
149 unsigned long i;
150
151 for (i = 0; i < timeout; i++) {
152 u32 val = br32(bp, reg);
153
154 if (clear && !(val & bit))
155 break;
156 if (!clear && (val & bit))
157 break;
158 udelay(10);
159 }
160 if (i == timeout) {
161 printk(KERN_ERR PFX "%s: BUG! Timeout waiting for bit %08x of register "
162 "%lx to %s.\n",
163 bp->dev->name,
164 bit, reg,
165 (clear ? "clear" : "set"));
166 return -ENODEV;
167 }
168 return 0;
169 }
170
171 /* Sonics SiliconBackplane support routines. ROFL, you should see all the
172 * buzz words used on this company's website :-)
173 *
174 * All of these routines must be invoked with bp->lock held and
175 * interrupts disabled.
176 */
177
178 #define SB_PCI_DMA 0x40000000 /* Client Mode PCI memory access space (1 GB) */
179 #define BCM4400_PCI_CORE_ADDR 0x18002000 /* Address of PCI core on BCM4400 cards */
180
181 static u32 ssb_get_core_rev(struct b44 *bp)
182 {
183 return (br32(bp, B44_SBIDHIGH) & SBIDHIGH_RC_MASK);
184 }
185
186 static u32 ssb_pci_setup(struct b44 *bp, u32 cores)
187 {
188 u32 bar_orig, pci_rev, val;
189
190 pci_read_config_dword(bp->pdev, SSB_BAR0_WIN, &bar_orig);
191 pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, BCM4400_PCI_CORE_ADDR);
192 pci_rev = ssb_get_core_rev(bp);
193
194 val = br32(bp, B44_SBINTVEC);
195 val |= cores;
196 bw32(bp, B44_SBINTVEC, val);
197
198 val = br32(bp, SSB_PCI_TRANS_2);
199 val |= SSB_PCI_PREF | SSB_PCI_BURST;
200 bw32(bp, SSB_PCI_TRANS_2, val);
201
202 pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, bar_orig);
203
204 return pci_rev;
205 }
206
207 static void ssb_core_disable(struct b44 *bp)
208 {
209 if (br32(bp, B44_SBTMSLOW) & SBTMSLOW_RESET)
210 return;
211
212 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_CLOCK));
213 b44_wait_bit(bp, B44_SBTMSLOW, SBTMSLOW_REJECT, 100000, 0);
214 b44_wait_bit(bp, B44_SBTMSHIGH, SBTMSHIGH_BUSY, 100000, 1);
215 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_FGC | SBTMSLOW_CLOCK |
216 SBTMSLOW_REJECT | SBTMSLOW_RESET));
217 br32(bp, B44_SBTMSLOW);
218 udelay(1);
219 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_RESET));
220 br32(bp, B44_SBTMSLOW);
221 udelay(1);
222 }
223
224 static void ssb_core_reset(struct b44 *bp)
225 {
226 u32 val;
227
228 ssb_core_disable(bp);
229 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_RESET | SBTMSLOW_CLOCK | SBTMSLOW_FGC));
230 br32(bp, B44_SBTMSLOW);
231 udelay(1);
232
233 /* Clear SERR if set, this is a hw bug workaround. */
234 if (br32(bp, B44_SBTMSHIGH) & SBTMSHIGH_SERR)
235 bw32(bp, B44_SBTMSHIGH, 0);
236
237 val = br32(bp, B44_SBIMSTATE);
238 if (val & (SBIMSTATE_IBE | SBIMSTATE_TO))
239 bw32(bp, B44_SBIMSTATE, val & ~(SBIMSTATE_IBE | SBIMSTATE_TO));
240
241 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK | SBTMSLOW_FGC));
242 br32(bp, B44_SBTMSLOW);
243 udelay(1);
244
245 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK));
246 br32(bp, B44_SBTMSLOW);
247 udelay(1);
248 }
249
250 static int ssb_core_unit(struct b44 *bp)
251 {
252 #if 0
253 u32 val = br32(bp, B44_SBADMATCH0);
254 u32 base;
255
256 type = val & SBADMATCH0_TYPE_MASK;
257 switch (type) {
258 case 0:
259 base = val & SBADMATCH0_BS0_MASK;
260 break;
261
262 case 1:
263 base = val & SBADMATCH0_BS1_MASK;
264 break;
265
266 case 2:
267 default:
268 base = val & SBADMATCH0_BS2_MASK;
269 break;
270 };
271 #endif
272 return 0;
273 }
274
275 static int ssb_is_core_up(struct b44 *bp)
276 {
277 return ((br32(bp, B44_SBTMSLOW) & (SBTMSLOW_RESET | SBTMSLOW_REJECT | SBTMSLOW_CLOCK))
278 == SBTMSLOW_CLOCK);
279 }
280
281 static void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
282 {
283 u32 val;
284
285 val = ((u32) data[2]) << 24;
286 val |= ((u32) data[3]) << 16;
287 val |= ((u32) data[4]) << 8;
288 val |= ((u32) data[5]) << 0;
289 bw32(bp, B44_CAM_DATA_LO, val);
290 val = (CAM_DATA_HI_VALID |
291 (((u32) data[0]) << 8) |
292 (((u32) data[1]) << 0));
293 bw32(bp, B44_CAM_DATA_HI, val);
294 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
295 (index << CAM_CTRL_INDEX_SHIFT)));
296 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
297 }
298
299 static inline void __b44_disable_ints(struct b44 *bp)
300 {
301 bw32(bp, B44_IMASK, 0);
302 }
303
304 static void b44_disable_ints(struct b44 *bp)
305 {
306 __b44_disable_ints(bp);
307
308 /* Flush posted writes. */
309 br32(bp, B44_IMASK);
310 }
311
312 static void b44_enable_ints(struct b44 *bp)
313 {
314 bw32(bp, B44_IMASK, bp->imask);
315 }
316
317 static int b44_readphy(struct b44 *bp, int reg, u32 *val)
318 {
319 int err;
320
321 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
322 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
323 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
324 (bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
325 (reg << MDIO_DATA_RA_SHIFT) |
326 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
327 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
328 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
329
330 return err;
331 }
332
333 static int b44_writephy(struct b44 *bp, int reg, u32 val)
334 {
335 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
336 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
337 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
338 (bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
339 (reg << MDIO_DATA_RA_SHIFT) |
340 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
341 (val & MDIO_DATA_DATA)));
342 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
343 }
344
345 /* miilib interface */
346 /* FIXME FIXME: phy_id is ignored, bp->phy_addr use is unconditional
347 * due to code existing before miilib use was added to this driver.
348 * Someone should remove this artificial driver limitation in
349 * b44_{read,write}phy. bp->phy_addr itself is fine (and needed).
350 */
351 static int b44_mii_read(struct net_device *dev, int phy_id, int location)
352 {
353 u32 val;
354 struct b44 *bp = netdev_priv(dev);
355 int rc = b44_readphy(bp, location, &val);
356 if (rc)
357 return 0xffffffff;
358 return val;
359 }
360
361 static void b44_mii_write(struct net_device *dev, int phy_id, int location,
362 int val)
363 {
364 struct b44 *bp = netdev_priv(dev);
365 b44_writephy(bp, location, val);
366 }
367
368 static int b44_phy_reset(struct b44 *bp)
369 {
370 u32 val;
371 int err;
372
373 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
374 if (err)
375 return err;
376 udelay(100);
377 err = b44_readphy(bp, MII_BMCR, &val);
378 if (!err) {
379 if (val & BMCR_RESET) {
380 printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
381 bp->dev->name);
382 err = -ENODEV;
383 }
384 }
385
386 return 0;
387 }
388
389 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
390 {
391 u32 val;
392
393 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
394 bp->flags |= pause_flags;
395
396 val = br32(bp, B44_RXCONFIG);
397 if (pause_flags & B44_FLAG_RX_PAUSE)
398 val |= RXCONFIG_FLOW;
399 else
400 val &= ~RXCONFIG_FLOW;
401 bw32(bp, B44_RXCONFIG, val);
402
403 val = br32(bp, B44_MAC_FLOW);
404 if (pause_flags & B44_FLAG_TX_PAUSE)
405 val |= (MAC_FLOW_PAUSE_ENAB |
406 (0xc0 & MAC_FLOW_RX_HI_WATER));
407 else
408 val &= ~MAC_FLOW_PAUSE_ENAB;
409 bw32(bp, B44_MAC_FLOW, val);
410 }
411
412 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
413 {
414 u32 pause_enab = 0;
415
416 /* The driver supports only rx pause by default because
417 the b44 mac tx pause mechanism generates excessive
418 pause frames.
419 Use ethtool to turn on b44 tx pause if necessary.
420 */
421 if ((local & ADVERTISE_PAUSE_CAP) &&
422 (local & ADVERTISE_PAUSE_ASYM)){
423 if ((remote & LPA_PAUSE_ASYM) &&
424 !(remote & LPA_PAUSE_CAP))
425 pause_enab |= B44_FLAG_RX_PAUSE;
426 }
427
428 __b44_set_flow_ctrl(bp, pause_enab);
429 }
430
431 static int b44_setup_phy(struct b44 *bp)
432 {
433 u32 val;
434 int err;
435
436 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
437 goto out;
438 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
439 val & MII_ALEDCTRL_ALLMSK)) != 0)
440 goto out;
441 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
442 goto out;
443 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
444 val | MII_TLEDCTRL_ENABLE)) != 0)
445 goto out;
446
447 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
448 u32 adv = ADVERTISE_CSMA;
449
450 if (bp->flags & B44_FLAG_ADV_10HALF)
451 adv |= ADVERTISE_10HALF;
452 if (bp->flags & B44_FLAG_ADV_10FULL)
453 adv |= ADVERTISE_10FULL;
454 if (bp->flags & B44_FLAG_ADV_100HALF)
455 adv |= ADVERTISE_100HALF;
456 if (bp->flags & B44_FLAG_ADV_100FULL)
457 adv |= ADVERTISE_100FULL;
458
459 if (bp->flags & B44_FLAG_PAUSE_AUTO)
460 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
461
462 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
463 goto out;
464 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
465 BMCR_ANRESTART))) != 0)
466 goto out;
467 } else {
468 u32 bmcr;
469
470 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
471 goto out;
472 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
473 if (bp->flags & B44_FLAG_100_BASE_T)
474 bmcr |= BMCR_SPEED100;
475 if (bp->flags & B44_FLAG_FULL_DUPLEX)
476 bmcr |= BMCR_FULLDPLX;
477 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
478 goto out;
479
480 /* Since we will not be negotiating there is no safe way
481 * to determine if the link partner supports flow control
482 * or not. So just disable it completely in this case.
483 */
484 b44_set_flow_ctrl(bp, 0, 0);
485 }
486
487 out:
488 return err;
489 }
490
491 static void b44_stats_update(struct b44 *bp)
492 {
493 unsigned long reg;
494 u32 *val;
495
496 val = &bp->hw_stats.tx_good_octets;
497 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
498 *val++ += br32(bp, reg);
499 }
500
501 /* Pad */
502 reg += 8*4UL;
503
504 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
505 *val++ += br32(bp, reg);
506 }
507 }
508
509 static void b44_link_report(struct b44 *bp)
510 {
511 if (!netif_carrier_ok(bp->dev)) {
512 printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
513 } else {
514 printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
515 bp->dev->name,
516 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
517 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
518
519 printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
520 "%s for RX.\n",
521 bp->dev->name,
522 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
523 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
524 }
525 }
526
527 static void b44_check_phy(struct b44 *bp)
528 {
529 u32 bmsr, aux;
530
531 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
532 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
533 (bmsr != 0xffff)) {
534 if (aux & MII_AUXCTRL_SPEED)
535 bp->flags |= B44_FLAG_100_BASE_T;
536 else
537 bp->flags &= ~B44_FLAG_100_BASE_T;
538 if (aux & MII_AUXCTRL_DUPLEX)
539 bp->flags |= B44_FLAG_FULL_DUPLEX;
540 else
541 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
542
543 if (!netif_carrier_ok(bp->dev) &&
544 (bmsr & BMSR_LSTATUS)) {
545 u32 val = br32(bp, B44_TX_CTRL);
546 u32 local_adv, remote_adv;
547
548 if (bp->flags & B44_FLAG_FULL_DUPLEX)
549 val |= TX_CTRL_DUPLEX;
550 else
551 val &= ~TX_CTRL_DUPLEX;
552 bw32(bp, B44_TX_CTRL, val);
553
554 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
555 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
556 !b44_readphy(bp, MII_LPA, &remote_adv))
557 b44_set_flow_ctrl(bp, local_adv, remote_adv);
558
559 /* Link now up */
560 netif_carrier_on(bp->dev);
561 b44_link_report(bp);
562 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
563 /* Link now down */
564 netif_carrier_off(bp->dev);
565 b44_link_report(bp);
566 }
567
568 if (bmsr & BMSR_RFAULT)
569 printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
570 bp->dev->name);
571 if (bmsr & BMSR_JCD)
572 printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
573 bp->dev->name);
574 }
575 }
576
577 static void b44_timer(unsigned long __opaque)
578 {
579 struct b44 *bp = (struct b44 *) __opaque;
580
581 spin_lock_irq(&bp->lock);
582
583 b44_check_phy(bp);
584
585 b44_stats_update(bp);
586
587 spin_unlock_irq(&bp->lock);
588
589 bp->timer.expires = jiffies + HZ;
590 add_timer(&bp->timer);
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 pci_unmap_single(bp->pdev,
608 pci_unmap_addr(rp, mapping),
609 skb->len,
610 PCI_DMA_TODEVICE);
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 = dev_alloc_skb(RX_PKT_BUF_SZ);
644 if (skb == NULL)
645 return -ENOMEM;
646
647 mapping = pci_map_single(bp->pdev, skb->data,
648 RX_PKT_BUF_SZ,
649 PCI_DMA_FROMDEVICE);
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(mapping) ||
654 mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) {
655 /* Sigh... */
656 if (!dma_mapping_error(mapping))
657 pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
658 dev_kfree_skb_any(skb);
659 skb = __dev_alloc_skb(RX_PKT_BUF_SZ,GFP_DMA);
660 if (skb == NULL)
661 return -ENOMEM;
662 mapping = pci_map_single(bp->pdev, skb->data,
663 RX_PKT_BUF_SZ,
664 PCI_DMA_FROMDEVICE);
665 if (dma_mapping_error(mapping) ||
666 mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) {
667 if (!dma_mapping_error(mapping))
668 pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
669 dev_kfree_skb_any(skb);
670 return -ENOMEM;
671 }
672 }
673
674 skb->dev = bp->dev;
675 skb_reserve(skb, bp->rx_offset);
676
677 rh = (struct rx_header *)
678 (skb->data - bp->rx_offset);
679 rh->len = 0;
680 rh->flags = 0;
681
682 map->skb = skb;
683 pci_unmap_addr_set(map, mapping, mapping);
684
685 if (src_map != NULL)
686 src_map->skb = NULL;
687
688 ctrl = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - bp->rx_offset));
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->rx_offset + bp->dma_offset);
695
696 if (bp->flags & B44_FLAG_RX_RING_HACK)
697 b44_sync_dma_desc_for_device(bp->pdev, 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 u32 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 pci_unmap_addr_set(dest_map, mapping,
723 pci_unmap_addr(src_map, mapping));
724
725 if (bp->flags & B44_FLAG_RX_RING_HACK)
726 b44_sync_dma_desc_for_cpu(bp->pdev, bp->rx_ring_dma,
727 src_idx * sizeof(src_desc),
728 DMA_BIDIRECTIONAL);
729
730 ctrl = src_desc->ctrl;
731 if (dest_idx == (B44_RX_RING_SIZE - 1))
732 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
733 else
734 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
735
736 dest_desc->ctrl = ctrl;
737 dest_desc->addr = src_desc->addr;
738
739 src_map->skb = NULL;
740
741 if (bp->flags & B44_FLAG_RX_RING_HACK)
742 b44_sync_dma_desc_for_device(bp->pdev, bp->rx_ring_dma,
743 dest_idx * sizeof(dest_desc),
744 DMA_BIDIRECTIONAL);
745
746 pci_dma_sync_single_for_device(bp->pdev, src_desc->addr,
747 RX_PKT_BUF_SZ,
748 PCI_DMA_FROMDEVICE);
749 }
750
751 static int b44_rx(struct b44 *bp, int budget)
752 {
753 int received;
754 u32 cons, prod;
755
756 received = 0;
757 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
758 prod /= sizeof(struct dma_desc);
759 cons = bp->rx_cons;
760
761 while (cons != prod && budget > 0) {
762 struct ring_info *rp = &bp->rx_buffers[cons];
763 struct sk_buff *skb = rp->skb;
764 dma_addr_t map = pci_unmap_addr(rp, mapping);
765 struct rx_header *rh;
766 u16 len;
767
768 pci_dma_sync_single_for_cpu(bp->pdev, map,
769 RX_PKT_BUF_SZ,
770 PCI_DMA_FROMDEVICE);
771 rh = (struct rx_header *) skb->data;
772 len = cpu_to_le16(rh->len);
773 if ((len > (RX_PKT_BUF_SZ - bp->rx_offset)) ||
774 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
775 drop_it:
776 b44_recycle_rx(bp, cons, bp->rx_prod);
777 drop_it_no_recycle:
778 bp->stats.rx_dropped++;
779 goto next_pkt;
780 }
781
782 if (len == 0) {
783 int i = 0;
784
785 do {
786 udelay(2);
787 barrier();
788 len = cpu_to_le16(rh->len);
789 } while (len == 0 && i++ < 5);
790 if (len == 0)
791 goto drop_it;
792 }
793
794 /* Omit CRC. */
795 len -= 4;
796
797 if (len > RX_COPY_THRESHOLD) {
798 int skb_size;
799 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
800 if (skb_size < 0)
801 goto drop_it;
802 pci_unmap_single(bp->pdev, map,
803 skb_size, PCI_DMA_FROMDEVICE);
804 /* Leave out rx_header */
805 skb_put(skb, len+bp->rx_offset);
806 skb_pull(skb,bp->rx_offset);
807 } else {
808 struct sk_buff *copy_skb;
809
810 b44_recycle_rx(bp, cons, bp->rx_prod);
811 copy_skb = dev_alloc_skb(len + 2);
812 if (copy_skb == NULL)
813 goto drop_it_no_recycle;
814
815 copy_skb->dev = bp->dev;
816 skb_reserve(copy_skb, 2);
817 skb_put(copy_skb, len);
818 /* DMA sync done above, copy just the actual packet */
819 memcpy(copy_skb->data, skb->data+bp->rx_offset, len);
820
821 skb = copy_skb;
822 }
823 skb->ip_summed = CHECKSUM_NONE;
824 skb->protocol = eth_type_trans(skb, bp->dev);
825 netif_receive_skb(skb);
826 bp->dev->last_rx = jiffies;
827 received++;
828 budget--;
829 next_pkt:
830 bp->rx_prod = (bp->rx_prod + 1) &
831 (B44_RX_RING_SIZE - 1);
832 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
833 }
834
835 bp->rx_cons = cons;
836 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
837
838 return received;
839 }
840
841 static int b44_poll(struct net_device *netdev, int *budget)
842 {
843 struct b44 *bp = netdev_priv(netdev);
844 int done;
845
846 spin_lock_irq(&bp->lock);
847
848 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
849 /* spin_lock(&bp->tx_lock); */
850 b44_tx(bp);
851 /* spin_unlock(&bp->tx_lock); */
852 }
853 spin_unlock_irq(&bp->lock);
854
855 done = 1;
856 if (bp->istat & ISTAT_RX) {
857 int orig_budget = *budget;
858 int work_done;
859
860 if (orig_budget > netdev->quota)
861 orig_budget = netdev->quota;
862
863 work_done = b44_rx(bp, orig_budget);
864
865 *budget -= work_done;
866 netdev->quota -= work_done;
867
868 if (work_done >= orig_budget)
869 done = 0;
870 }
871
872 if (bp->istat & ISTAT_ERRORS) {
873 spin_lock_irq(&bp->lock);
874 b44_halt(bp);
875 b44_init_rings(bp);
876 b44_init_hw(bp);
877 netif_wake_queue(bp->dev);
878 spin_unlock_irq(&bp->lock);
879 done = 1;
880 }
881
882 if (done) {
883 netif_rx_complete(netdev);
884 b44_enable_ints(bp);
885 }
886
887 return (done ? 0 : 1);
888 }
889
890 static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
891 {
892 struct net_device *dev = dev_id;
893 struct b44 *bp = netdev_priv(dev);
894 u32 istat, imask;
895 int handled = 0;
896
897 spin_lock(&bp->lock);
898
899 istat = br32(bp, B44_ISTAT);
900 imask = br32(bp, B44_IMASK);
901
902 /* ??? What the fuck is the purpose of the interrupt mask
903 * ??? register if we have to mask it out by hand anyways?
904 */
905 istat &= imask;
906 if (istat) {
907 handled = 1;
908
909 if (unlikely(!netif_running(dev))) {
910 printk(KERN_INFO "%s: late interrupt.\n", dev->name);
911 goto irq_ack;
912 }
913
914 if (netif_rx_schedule_prep(dev)) {
915 /* NOTE: These writes are posted by the readback of
916 * the ISTAT register below.
917 */
918 bp->istat = istat;
919 __b44_disable_ints(bp);
920 __netif_rx_schedule(dev);
921 } else {
922 printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
923 dev->name);
924 }
925
926 irq_ack:
927 bw32(bp, B44_ISTAT, istat);
928 br32(bp, B44_ISTAT);
929 }
930 spin_unlock(&bp->lock);
931 return IRQ_RETVAL(handled);
932 }
933
934 static void b44_tx_timeout(struct net_device *dev)
935 {
936 struct b44 *bp = netdev_priv(dev);
937
938 printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
939 dev->name);
940
941 spin_lock_irq(&bp->lock);
942
943 b44_halt(bp);
944 b44_init_rings(bp);
945 b44_init_hw(bp);
946
947 spin_unlock_irq(&bp->lock);
948
949 b44_enable_ints(bp);
950
951 netif_wake_queue(dev);
952 }
953
954 static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
955 {
956 struct b44 *bp = netdev_priv(dev);
957 struct sk_buff *bounce_skb;
958 int rc = NETDEV_TX_OK;
959 dma_addr_t mapping;
960 u32 len, entry, ctrl;
961
962 len = skb->len;
963 spin_lock_irq(&bp->lock);
964
965 /* This is a hard error, log it. */
966 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
967 netif_stop_queue(dev);
968 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
969 dev->name);
970 goto err_out;
971 }
972
973 mapping = pci_map_single(bp->pdev, skb->data, len, PCI_DMA_TODEVICE);
974 if (dma_mapping_error(mapping) || mapping + len > B44_DMA_MASK) {
975 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
976 if (!dma_mapping_error(mapping))
977 pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE);
978
979 bounce_skb = __dev_alloc_skb(TX_PKT_BUF_SZ,
980 GFP_ATOMIC|GFP_DMA);
981 if (!bounce_skb)
982 goto err_out;
983
984 mapping = pci_map_single(bp->pdev, bounce_skb->data,
985 len, PCI_DMA_TODEVICE);
986 if (dma_mapping_error(mapping) || mapping + len > B44_DMA_MASK) {
987 if (!dma_mapping_error(mapping))
988 pci_unmap_single(bp->pdev, mapping,
989 len, PCI_DMA_TODEVICE);
990 dev_kfree_skb_any(bounce_skb);
991 goto err_out;
992 }
993
994 memcpy(skb_put(bounce_skb, len), skb->data, skb->len);
995 dev_kfree_skb_any(skb);
996 skb = bounce_skb;
997 }
998
999 entry = bp->tx_prod;
1000 bp->tx_buffers[entry].skb = skb;
1001 pci_unmap_addr_set(&bp->tx_buffers[entry], mapping, mapping);
1002
1003 ctrl = (len & DESC_CTRL_LEN);
1004 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
1005 if (entry == (B44_TX_RING_SIZE - 1))
1006 ctrl |= DESC_CTRL_EOT;
1007
1008 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1009 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1010
1011 if (bp->flags & B44_FLAG_TX_RING_HACK)
1012 b44_sync_dma_desc_for_device(bp->pdev, bp->tx_ring_dma,
1013 entry * sizeof(bp->tx_ring[0]),
1014 DMA_TO_DEVICE);
1015
1016 entry = NEXT_TX(entry);
1017
1018 bp->tx_prod = entry;
1019
1020 wmb();
1021
1022 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1023 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1024 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1025 if (bp->flags & B44_FLAG_REORDER_BUG)
1026 br32(bp, B44_DMATX_PTR);
1027
1028 if (TX_BUFFS_AVAIL(bp) < 1)
1029 netif_stop_queue(dev);
1030
1031 dev->trans_start = jiffies;
1032
1033 out_unlock:
1034 spin_unlock_irq(&bp->lock);
1035
1036 return rc;
1037
1038 err_out:
1039 rc = NETDEV_TX_BUSY;
1040 goto out_unlock;
1041 }
1042
1043 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1044 {
1045 struct b44 *bp = netdev_priv(dev);
1046
1047 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1048 return -EINVAL;
1049
1050 if (!netif_running(dev)) {
1051 /* We'll just catch it later when the
1052 * device is up'd.
1053 */
1054 dev->mtu = new_mtu;
1055 return 0;
1056 }
1057
1058 spin_lock_irq(&bp->lock);
1059 b44_halt(bp);
1060 dev->mtu = new_mtu;
1061 b44_init_rings(bp);
1062 b44_init_hw(bp);
1063 spin_unlock_irq(&bp->lock);
1064
1065 b44_enable_ints(bp);
1066
1067 return 0;
1068 }
1069
1070 /* Free up pending packets in all rx/tx rings.
1071 *
1072 * The chip has been shut down and the driver detached from
1073 * the networking, so no interrupts or new tx packets will
1074 * end up in the driver. bp->lock is not held and we are not
1075 * in an interrupt context and thus may sleep.
1076 */
1077 static void b44_free_rings(struct b44 *bp)
1078 {
1079 struct ring_info *rp;
1080 int i;
1081
1082 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1083 rp = &bp->rx_buffers[i];
1084
1085 if (rp->skb == NULL)
1086 continue;
1087 pci_unmap_single(bp->pdev,
1088 pci_unmap_addr(rp, mapping),
1089 RX_PKT_BUF_SZ,
1090 PCI_DMA_FROMDEVICE);
1091 dev_kfree_skb_any(rp->skb);
1092 rp->skb = NULL;
1093 }
1094
1095 /* XXX needs changes once NETIF_F_SG is set... */
1096 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1097 rp = &bp->tx_buffers[i];
1098
1099 if (rp->skb == NULL)
1100 continue;
1101 pci_unmap_single(bp->pdev,
1102 pci_unmap_addr(rp, mapping),
1103 rp->skb->len,
1104 PCI_DMA_TODEVICE);
1105 dev_kfree_skb_any(rp->skb);
1106 rp->skb = NULL;
1107 }
1108 }
1109
1110 /* Initialize tx/rx rings for packet processing.
1111 *
1112 * The chip has been shut down and the driver detached from
1113 * the networking, so no interrupts or new tx packets will
1114 * end up in the driver.
1115 */
1116 static void b44_init_rings(struct b44 *bp)
1117 {
1118 int i;
1119
1120 b44_free_rings(bp);
1121
1122 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1123 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1124
1125 if (bp->flags & B44_FLAG_RX_RING_HACK)
1126 dma_sync_single_for_device(&bp->pdev->dev, bp->rx_ring_dma,
1127 DMA_TABLE_BYTES,
1128 PCI_DMA_BIDIRECTIONAL);
1129
1130 if (bp->flags & B44_FLAG_TX_RING_HACK)
1131 dma_sync_single_for_device(&bp->pdev->dev, bp->tx_ring_dma,
1132 DMA_TABLE_BYTES,
1133 PCI_DMA_TODEVICE);
1134
1135 for (i = 0; i < bp->rx_pending; i++) {
1136 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1137 break;
1138 }
1139 }
1140
1141 /*
1142 * Must not be invoked with interrupt sources disabled and
1143 * the hardware shutdown down.
1144 */
1145 static void b44_free_consistent(struct b44 *bp)
1146 {
1147 kfree(bp->rx_buffers);
1148 bp->rx_buffers = NULL;
1149 kfree(bp->tx_buffers);
1150 bp->tx_buffers = NULL;
1151 if (bp->rx_ring) {
1152 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1153 dma_unmap_single(&bp->pdev->dev, bp->rx_ring_dma,
1154 DMA_TABLE_BYTES,
1155 DMA_BIDIRECTIONAL);
1156 kfree(bp->rx_ring);
1157 } else
1158 pci_free_consistent(bp->pdev, DMA_TABLE_BYTES,
1159 bp->rx_ring, bp->rx_ring_dma);
1160 bp->rx_ring = NULL;
1161 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1162 }
1163 if (bp->tx_ring) {
1164 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1165 dma_unmap_single(&bp->pdev->dev, bp->tx_ring_dma,
1166 DMA_TABLE_BYTES,
1167 DMA_TO_DEVICE);
1168 kfree(bp->tx_ring);
1169 } else
1170 pci_free_consistent(bp->pdev, DMA_TABLE_BYTES,
1171 bp->tx_ring, bp->tx_ring_dma);
1172 bp->tx_ring = NULL;
1173 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1174 }
1175 }
1176
1177 /*
1178 * Must not be invoked with interrupt sources disabled and
1179 * the hardware shutdown down. Can sleep.
1180 */
1181 static int b44_alloc_consistent(struct b44 *bp)
1182 {
1183 int size;
1184
1185 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1186 bp->rx_buffers = kzalloc(size, GFP_KERNEL);
1187 if (!bp->rx_buffers)
1188 goto out_err;
1189
1190 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1191 bp->tx_buffers = kzalloc(size, GFP_KERNEL);
1192 if (!bp->tx_buffers)
1193 goto out_err;
1194
1195 size = DMA_TABLE_BYTES;
1196 bp->rx_ring = pci_alloc_consistent(bp->pdev, size, &bp->rx_ring_dma);
1197 if (!bp->rx_ring) {
1198 /* Allocation may have failed due to pci_alloc_consistent
1199 insisting on use of GFP_DMA, which is more restrictive
1200 than necessary... */
1201 struct dma_desc *rx_ring;
1202 dma_addr_t rx_ring_dma;
1203
1204 rx_ring = kzalloc(size, GFP_KERNEL);
1205 if (!rx_ring)
1206 goto out_err;
1207
1208 rx_ring_dma = dma_map_single(&bp->pdev->dev, rx_ring,
1209 DMA_TABLE_BYTES,
1210 DMA_BIDIRECTIONAL);
1211
1212 if (dma_mapping_error(rx_ring_dma) ||
1213 rx_ring_dma + size > B44_DMA_MASK) {
1214 kfree(rx_ring);
1215 goto out_err;
1216 }
1217
1218 bp->rx_ring = rx_ring;
1219 bp->rx_ring_dma = rx_ring_dma;
1220 bp->flags |= B44_FLAG_RX_RING_HACK;
1221 }
1222
1223 bp->tx_ring = pci_alloc_consistent(bp->pdev, size, &bp->tx_ring_dma);
1224 if (!bp->tx_ring) {
1225 /* Allocation may have failed due to pci_alloc_consistent
1226 insisting on use of GFP_DMA, which is more restrictive
1227 than necessary... */
1228 struct dma_desc *tx_ring;
1229 dma_addr_t tx_ring_dma;
1230
1231 tx_ring = kzalloc(size, GFP_KERNEL);
1232 if (!tx_ring)
1233 goto out_err;
1234
1235 tx_ring_dma = dma_map_single(&bp->pdev->dev, tx_ring,
1236 DMA_TABLE_BYTES,
1237 DMA_TO_DEVICE);
1238
1239 if (dma_mapping_error(tx_ring_dma) ||
1240 tx_ring_dma + size > B44_DMA_MASK) {
1241 kfree(tx_ring);
1242 goto out_err;
1243 }
1244
1245 bp->tx_ring = tx_ring;
1246 bp->tx_ring_dma = tx_ring_dma;
1247 bp->flags |= B44_FLAG_TX_RING_HACK;
1248 }
1249
1250 return 0;
1251
1252 out_err:
1253 b44_free_consistent(bp);
1254 return -ENOMEM;
1255 }
1256
1257 /* bp->lock is held. */
1258 static void b44_clear_stats(struct b44 *bp)
1259 {
1260 unsigned long reg;
1261
1262 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1263 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1264 br32(bp, reg);
1265 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1266 br32(bp, reg);
1267 }
1268
1269 /* bp->lock is held. */
1270 static void b44_chip_reset(struct b44 *bp)
1271 {
1272 if (ssb_is_core_up(bp)) {
1273 bw32(bp, B44_RCV_LAZY, 0);
1274 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1275 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 100, 1);
1276 bw32(bp, B44_DMATX_CTRL, 0);
1277 bp->tx_prod = bp->tx_cons = 0;
1278 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1279 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1280 100, 0);
1281 }
1282 bw32(bp, B44_DMARX_CTRL, 0);
1283 bp->rx_prod = bp->rx_cons = 0;
1284 } else {
1285 ssb_pci_setup(bp, (bp->core_unit == 0 ?
1286 SBINTVEC_ENET0 :
1287 SBINTVEC_ENET1));
1288 }
1289
1290 ssb_core_reset(bp);
1291
1292 b44_clear_stats(bp);
1293
1294 /* Make PHY accessible. */
1295 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1296 (0x0d & MDIO_CTRL_MAXF_MASK)));
1297 br32(bp, B44_MDIO_CTRL);
1298
1299 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1300 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1301 br32(bp, B44_ENET_CTRL);
1302 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1303 } else {
1304 u32 val = br32(bp, B44_DEVCTRL);
1305
1306 if (val & DEVCTRL_EPR) {
1307 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1308 br32(bp, B44_DEVCTRL);
1309 udelay(100);
1310 }
1311 bp->flags |= B44_FLAG_INTERNAL_PHY;
1312 }
1313 }
1314
1315 /* bp->lock is held. */
1316 static void b44_halt(struct b44 *bp)
1317 {
1318 b44_disable_ints(bp);
1319 b44_chip_reset(bp);
1320 }
1321
1322 /* bp->lock is held. */
1323 static void __b44_set_mac_addr(struct b44 *bp)
1324 {
1325 bw32(bp, B44_CAM_CTRL, 0);
1326 if (!(bp->dev->flags & IFF_PROMISC)) {
1327 u32 val;
1328
1329 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1330 val = br32(bp, B44_CAM_CTRL);
1331 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1332 }
1333 }
1334
1335 static int b44_set_mac_addr(struct net_device *dev, void *p)
1336 {
1337 struct b44 *bp = netdev_priv(dev);
1338 struct sockaddr *addr = p;
1339
1340 if (netif_running(dev))
1341 return -EBUSY;
1342
1343 if (!is_valid_ether_addr(addr->sa_data))
1344 return -EINVAL;
1345
1346 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1347
1348 spin_lock_irq(&bp->lock);
1349 __b44_set_mac_addr(bp);
1350 spin_unlock_irq(&bp->lock);
1351
1352 return 0;
1353 }
1354
1355 /* Called at device open time to get the chip ready for
1356 * packet processing. Invoked with bp->lock held.
1357 */
1358 static void __b44_set_rx_mode(struct net_device *);
1359 static void b44_init_hw(struct b44 *bp)
1360 {
1361 u32 val;
1362
1363 b44_chip_reset(bp);
1364 b44_phy_reset(bp);
1365 b44_setup_phy(bp);
1366
1367 /* Enable CRC32, set proper LED modes and power on PHY */
1368 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1369 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1370
1371 /* This sets the MAC address too. */
1372 __b44_set_rx_mode(bp->dev);
1373
1374 /* MTU + eth header + possible VLAN tag + struct rx_header */
1375 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1376 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1377
1378 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1379 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1380 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1381 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1382 (bp->rx_offset << DMARX_CTRL_ROSHIFT)));
1383 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1384
1385 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1386 bp->rx_prod = bp->rx_pending;
1387
1388 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1389
1390 val = br32(bp, B44_ENET_CTRL);
1391 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1392 }
1393
1394 static int b44_open(struct net_device *dev)
1395 {
1396 struct b44 *bp = netdev_priv(dev);
1397 int err;
1398
1399 err = b44_alloc_consistent(bp);
1400 if (err)
1401 goto out;
1402
1403 b44_init_rings(bp);
1404 b44_init_hw(bp);
1405
1406 b44_check_phy(bp);
1407
1408 err = request_irq(dev->irq, b44_interrupt, SA_SHIRQ, dev->name, dev);
1409 if (unlikely(err < 0)) {
1410 b44_chip_reset(bp);
1411 b44_free_rings(bp);
1412 b44_free_consistent(bp);
1413 goto out;
1414 }
1415
1416 init_timer(&bp->timer);
1417 bp->timer.expires = jiffies + HZ;
1418 bp->timer.data = (unsigned long) bp;
1419 bp->timer.function = b44_timer;
1420 add_timer(&bp->timer);
1421
1422 b44_enable_ints(bp);
1423 netif_start_queue(dev);
1424 out:
1425 return err;
1426 }
1427
1428 #if 0
1429 /*static*/ void b44_dump_state(struct b44 *bp)
1430 {
1431 u32 val32, val32_2, val32_3, val32_4, val32_5;
1432 u16 val16;
1433
1434 pci_read_config_word(bp->pdev, PCI_STATUS, &val16);
1435 printk("DEBUG: PCI status [%04x] \n", val16);
1436
1437 }
1438 #endif
1439
1440 #ifdef CONFIG_NET_POLL_CONTROLLER
1441 /*
1442 * Polling receive - used by netconsole and other diagnostic tools
1443 * to allow network i/o with interrupts disabled.
1444 */
1445 static void b44_poll_controller(struct net_device *dev)
1446 {
1447 disable_irq(dev->irq);
1448 b44_interrupt(dev->irq, dev, NULL);
1449 enable_irq(dev->irq);
1450 }
1451 #endif
1452
1453 static int b44_close(struct net_device *dev)
1454 {
1455 struct b44 *bp = netdev_priv(dev);
1456
1457 netif_stop_queue(dev);
1458
1459 netif_poll_disable(dev);
1460
1461 del_timer_sync(&bp->timer);
1462
1463 spin_lock_irq(&bp->lock);
1464
1465 #if 0
1466 b44_dump_state(bp);
1467 #endif
1468 b44_halt(bp);
1469 b44_free_rings(bp);
1470 netif_carrier_off(dev);
1471
1472 spin_unlock_irq(&bp->lock);
1473
1474 free_irq(dev->irq, dev);
1475
1476 netif_poll_enable(dev);
1477
1478 b44_free_consistent(bp);
1479
1480 return 0;
1481 }
1482
1483 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1484 {
1485 struct b44 *bp = netdev_priv(dev);
1486 struct net_device_stats *nstat = &bp->stats;
1487 struct b44_hw_stats *hwstat = &bp->hw_stats;
1488
1489 /* Convert HW stats into netdevice stats. */
1490 nstat->rx_packets = hwstat->rx_pkts;
1491 nstat->tx_packets = hwstat->tx_pkts;
1492 nstat->rx_bytes = hwstat->rx_octets;
1493 nstat->tx_bytes = hwstat->tx_octets;
1494 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1495 hwstat->tx_oversize_pkts +
1496 hwstat->tx_underruns +
1497 hwstat->tx_excessive_cols +
1498 hwstat->tx_late_cols);
1499 nstat->multicast = hwstat->tx_multicast_pkts;
1500 nstat->collisions = hwstat->tx_total_cols;
1501
1502 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1503 hwstat->rx_undersize);
1504 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1505 nstat->rx_frame_errors = hwstat->rx_align_errs;
1506 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1507 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1508 hwstat->rx_oversize_pkts +
1509 hwstat->rx_missed_pkts +
1510 hwstat->rx_crc_align_errs +
1511 hwstat->rx_undersize +
1512 hwstat->rx_crc_errs +
1513 hwstat->rx_align_errs +
1514 hwstat->rx_symbol_errs);
1515
1516 nstat->tx_aborted_errors = hwstat->tx_underruns;
1517 #if 0
1518 /* Carrier lost counter seems to be broken for some devices */
1519 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1520 #endif
1521
1522 return nstat;
1523 }
1524
1525 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1526 {
1527 struct dev_mc_list *mclist;
1528 int i, num_ents;
1529
1530 num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1531 mclist = dev->mc_list;
1532 for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1533 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1534 }
1535 return i+1;
1536 }
1537
1538 static void __b44_set_rx_mode(struct net_device *dev)
1539 {
1540 struct b44 *bp = netdev_priv(dev);
1541 u32 val;
1542
1543 val = br32(bp, B44_RXCONFIG);
1544 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1545 if (dev->flags & IFF_PROMISC) {
1546 val |= RXCONFIG_PROMISC;
1547 bw32(bp, B44_RXCONFIG, val);
1548 } else {
1549 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1550 int i = 0;
1551
1552 __b44_set_mac_addr(bp);
1553
1554 if (dev->flags & IFF_ALLMULTI)
1555 val |= RXCONFIG_ALLMULTI;
1556 else
1557 i = __b44_load_mcast(bp, dev);
1558
1559 for (; i < 64; i++) {
1560 __b44_cam_write(bp, zero, i);
1561 }
1562 bw32(bp, B44_RXCONFIG, val);
1563 val = br32(bp, B44_CAM_CTRL);
1564 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1565 }
1566 }
1567
1568 static void b44_set_rx_mode(struct net_device *dev)
1569 {
1570 struct b44 *bp = netdev_priv(dev);
1571
1572 spin_lock_irq(&bp->lock);
1573 __b44_set_rx_mode(dev);
1574 spin_unlock_irq(&bp->lock);
1575 }
1576
1577 static u32 b44_get_msglevel(struct net_device *dev)
1578 {
1579 struct b44 *bp = netdev_priv(dev);
1580 return bp->msg_enable;
1581 }
1582
1583 static void b44_set_msglevel(struct net_device *dev, u32 value)
1584 {
1585 struct b44 *bp = netdev_priv(dev);
1586 bp->msg_enable = value;
1587 }
1588
1589 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1590 {
1591 struct b44 *bp = netdev_priv(dev);
1592 struct pci_dev *pci_dev = bp->pdev;
1593
1594 strcpy (info->driver, DRV_MODULE_NAME);
1595 strcpy (info->version, DRV_MODULE_VERSION);
1596 strcpy (info->bus_info, pci_name(pci_dev));
1597 }
1598
1599 static int b44_nway_reset(struct net_device *dev)
1600 {
1601 struct b44 *bp = netdev_priv(dev);
1602 u32 bmcr;
1603 int r;
1604
1605 spin_lock_irq(&bp->lock);
1606 b44_readphy(bp, MII_BMCR, &bmcr);
1607 b44_readphy(bp, MII_BMCR, &bmcr);
1608 r = -EINVAL;
1609 if (bmcr & BMCR_ANENABLE) {
1610 b44_writephy(bp, MII_BMCR,
1611 bmcr | BMCR_ANRESTART);
1612 r = 0;
1613 }
1614 spin_unlock_irq(&bp->lock);
1615
1616 return r;
1617 }
1618
1619 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1620 {
1621 struct b44 *bp = netdev_priv(dev);
1622
1623 if (!netif_running(dev))
1624 return -EAGAIN;
1625 cmd->supported = (SUPPORTED_Autoneg);
1626 cmd->supported |= (SUPPORTED_100baseT_Half |
1627 SUPPORTED_100baseT_Full |
1628 SUPPORTED_10baseT_Half |
1629 SUPPORTED_10baseT_Full |
1630 SUPPORTED_MII);
1631
1632 cmd->advertising = 0;
1633 if (bp->flags & B44_FLAG_ADV_10HALF)
1634 cmd->advertising |= ADVERTISED_10baseT_Half;
1635 if (bp->flags & B44_FLAG_ADV_10FULL)
1636 cmd->advertising |= ADVERTISED_10baseT_Full;
1637 if (bp->flags & B44_FLAG_ADV_100HALF)
1638 cmd->advertising |= ADVERTISED_100baseT_Half;
1639 if (bp->flags & B44_FLAG_ADV_100FULL)
1640 cmd->advertising |= ADVERTISED_100baseT_Full;
1641 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1642 cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1643 SPEED_100 : SPEED_10;
1644 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1645 DUPLEX_FULL : DUPLEX_HALF;
1646 cmd->port = 0;
1647 cmd->phy_address = bp->phy_addr;
1648 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1649 XCVR_INTERNAL : XCVR_EXTERNAL;
1650 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1651 AUTONEG_DISABLE : AUTONEG_ENABLE;
1652 cmd->maxtxpkt = 0;
1653 cmd->maxrxpkt = 0;
1654 return 0;
1655 }
1656
1657 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1658 {
1659 struct b44 *bp = netdev_priv(dev);
1660
1661 if (!netif_running(dev))
1662 return -EAGAIN;
1663
1664 /* We do not support gigabit. */
1665 if (cmd->autoneg == AUTONEG_ENABLE) {
1666 if (cmd->advertising &
1667 (ADVERTISED_1000baseT_Half |
1668 ADVERTISED_1000baseT_Full))
1669 return -EINVAL;
1670 } else if ((cmd->speed != SPEED_100 &&
1671 cmd->speed != SPEED_10) ||
1672 (cmd->duplex != DUPLEX_HALF &&
1673 cmd->duplex != DUPLEX_FULL)) {
1674 return -EINVAL;
1675 }
1676
1677 spin_lock_irq(&bp->lock);
1678
1679 if (cmd->autoneg == AUTONEG_ENABLE) {
1680 bp->flags &= ~B44_FLAG_FORCE_LINK;
1681 bp->flags &= ~(B44_FLAG_ADV_10HALF |
1682 B44_FLAG_ADV_10FULL |
1683 B44_FLAG_ADV_100HALF |
1684 B44_FLAG_ADV_100FULL);
1685 if (cmd->advertising & ADVERTISE_10HALF)
1686 bp->flags |= B44_FLAG_ADV_10HALF;
1687 if (cmd->advertising & ADVERTISE_10FULL)
1688 bp->flags |= B44_FLAG_ADV_10FULL;
1689 if (cmd->advertising & ADVERTISE_100HALF)
1690 bp->flags |= B44_FLAG_ADV_100HALF;
1691 if (cmd->advertising & ADVERTISE_100FULL)
1692 bp->flags |= B44_FLAG_ADV_100FULL;
1693 } else {
1694 bp->flags |= B44_FLAG_FORCE_LINK;
1695 if (cmd->speed == SPEED_100)
1696 bp->flags |= B44_FLAG_100_BASE_T;
1697 if (cmd->duplex == DUPLEX_FULL)
1698 bp->flags |= B44_FLAG_FULL_DUPLEX;
1699 }
1700
1701 b44_setup_phy(bp);
1702
1703 spin_unlock_irq(&bp->lock);
1704
1705 return 0;
1706 }
1707
1708 static void b44_get_ringparam(struct net_device *dev,
1709 struct ethtool_ringparam *ering)
1710 {
1711 struct b44 *bp = netdev_priv(dev);
1712
1713 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1714 ering->rx_pending = bp->rx_pending;
1715
1716 /* XXX ethtool lacks a tx_max_pending, oops... */
1717 }
1718
1719 static int b44_set_ringparam(struct net_device *dev,
1720 struct ethtool_ringparam *ering)
1721 {
1722 struct b44 *bp = netdev_priv(dev);
1723
1724 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1725 (ering->rx_mini_pending != 0) ||
1726 (ering->rx_jumbo_pending != 0) ||
1727 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1728 return -EINVAL;
1729
1730 spin_lock_irq(&bp->lock);
1731
1732 bp->rx_pending = ering->rx_pending;
1733 bp->tx_pending = ering->tx_pending;
1734
1735 b44_halt(bp);
1736 b44_init_rings(bp);
1737 b44_init_hw(bp);
1738 netif_wake_queue(bp->dev);
1739 spin_unlock_irq(&bp->lock);
1740
1741 b44_enable_ints(bp);
1742
1743 return 0;
1744 }
1745
1746 static void b44_get_pauseparam(struct net_device *dev,
1747 struct ethtool_pauseparam *epause)
1748 {
1749 struct b44 *bp = netdev_priv(dev);
1750
1751 epause->autoneg =
1752 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1753 epause->rx_pause =
1754 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1755 epause->tx_pause =
1756 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1757 }
1758
1759 static int b44_set_pauseparam(struct net_device *dev,
1760 struct ethtool_pauseparam *epause)
1761 {
1762 struct b44 *bp = netdev_priv(dev);
1763
1764 spin_lock_irq(&bp->lock);
1765 if (epause->autoneg)
1766 bp->flags |= B44_FLAG_PAUSE_AUTO;
1767 else
1768 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1769 if (epause->rx_pause)
1770 bp->flags |= B44_FLAG_RX_PAUSE;
1771 else
1772 bp->flags &= ~B44_FLAG_RX_PAUSE;
1773 if (epause->tx_pause)
1774 bp->flags |= B44_FLAG_TX_PAUSE;
1775 else
1776 bp->flags &= ~B44_FLAG_TX_PAUSE;
1777 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1778 b44_halt(bp);
1779 b44_init_rings(bp);
1780 b44_init_hw(bp);
1781 } else {
1782 __b44_set_flow_ctrl(bp, bp->flags);
1783 }
1784 spin_unlock_irq(&bp->lock);
1785
1786 b44_enable_ints(bp);
1787
1788 return 0;
1789 }
1790
1791 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1792 {
1793 switch(stringset) {
1794 case ETH_SS_STATS:
1795 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1796 break;
1797 }
1798 }
1799
1800 static int b44_get_stats_count(struct net_device *dev)
1801 {
1802 return ARRAY_SIZE(b44_gstrings);
1803 }
1804
1805 static void b44_get_ethtool_stats(struct net_device *dev,
1806 struct ethtool_stats *stats, u64 *data)
1807 {
1808 struct b44 *bp = netdev_priv(dev);
1809 u32 *val = &bp->hw_stats.tx_good_octets;
1810 u32 i;
1811
1812 spin_lock_irq(&bp->lock);
1813
1814 b44_stats_update(bp);
1815
1816 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
1817 *data++ = *val++;
1818
1819 spin_unlock_irq(&bp->lock);
1820 }
1821
1822 static struct ethtool_ops b44_ethtool_ops = {
1823 .get_drvinfo = b44_get_drvinfo,
1824 .get_settings = b44_get_settings,
1825 .set_settings = b44_set_settings,
1826 .nway_reset = b44_nway_reset,
1827 .get_link = ethtool_op_get_link,
1828 .get_ringparam = b44_get_ringparam,
1829 .set_ringparam = b44_set_ringparam,
1830 .get_pauseparam = b44_get_pauseparam,
1831 .set_pauseparam = b44_set_pauseparam,
1832 .get_msglevel = b44_get_msglevel,
1833 .set_msglevel = b44_set_msglevel,
1834 .get_strings = b44_get_strings,
1835 .get_stats_count = b44_get_stats_count,
1836 .get_ethtool_stats = b44_get_ethtool_stats,
1837 .get_perm_addr = ethtool_op_get_perm_addr,
1838 };
1839
1840 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1841 {
1842 struct mii_ioctl_data *data = if_mii(ifr);
1843 struct b44 *bp = netdev_priv(dev);
1844 int err = -EINVAL;
1845
1846 if (!netif_running(dev))
1847 goto out;
1848
1849 spin_lock_irq(&bp->lock);
1850 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
1851 spin_unlock_irq(&bp->lock);
1852 out:
1853 return err;
1854 }
1855
1856 /* Read 128-bytes of EEPROM. */
1857 static int b44_read_eeprom(struct b44 *bp, u8 *data)
1858 {
1859 long i;
1860 u16 *ptr = (u16 *) data;
1861
1862 for (i = 0; i < 128; i += 2)
1863 ptr[i / 2] = readw(bp->regs + 4096 + i);
1864
1865 return 0;
1866 }
1867
1868 static int __devinit b44_get_invariants(struct b44 *bp)
1869 {
1870 u8 eeprom[128];
1871 int err;
1872
1873 err = b44_read_eeprom(bp, &eeprom[0]);
1874 if (err)
1875 goto out;
1876
1877 bp->dev->dev_addr[0] = eeprom[79];
1878 bp->dev->dev_addr[1] = eeprom[78];
1879 bp->dev->dev_addr[2] = eeprom[81];
1880 bp->dev->dev_addr[3] = eeprom[80];
1881 bp->dev->dev_addr[4] = eeprom[83];
1882 bp->dev->dev_addr[5] = eeprom[82];
1883
1884 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
1885 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
1886 return -EINVAL;
1887 }
1888
1889 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
1890
1891 bp->phy_addr = eeprom[90] & 0x1f;
1892
1893 /* With this, plus the rx_header prepended to the data by the
1894 * hardware, we'll land the ethernet header on a 2-byte boundary.
1895 */
1896 bp->rx_offset = 30;
1897
1898 bp->imask = IMASK_DEF;
1899
1900 bp->core_unit = ssb_core_unit(bp);
1901 bp->dma_offset = SB_PCI_DMA;
1902
1903 /* XXX - really required?
1904 bp->flags |= B44_FLAG_BUGGY_TXPTR;
1905 */
1906 out:
1907 return err;
1908 }
1909
1910 static int __devinit b44_init_one(struct pci_dev *pdev,
1911 const struct pci_device_id *ent)
1912 {
1913 static int b44_version_printed = 0;
1914 unsigned long b44reg_base, b44reg_len;
1915 struct net_device *dev;
1916 struct b44 *bp;
1917 int err, i;
1918
1919 if (b44_version_printed++ == 0)
1920 printk(KERN_INFO "%s", version);
1921
1922 err = pci_enable_device(pdev);
1923 if (err) {
1924 printk(KERN_ERR PFX "Cannot enable PCI device, "
1925 "aborting.\n");
1926 return err;
1927 }
1928
1929 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1930 printk(KERN_ERR PFX "Cannot find proper PCI device "
1931 "base address, aborting.\n");
1932 err = -ENODEV;
1933 goto err_out_disable_pdev;
1934 }
1935
1936 err = pci_request_regions(pdev, DRV_MODULE_NAME);
1937 if (err) {
1938 printk(KERN_ERR PFX "Cannot obtain PCI resources, "
1939 "aborting.\n");
1940 goto err_out_disable_pdev;
1941 }
1942
1943 pci_set_master(pdev);
1944
1945 err = pci_set_dma_mask(pdev, (u64) B44_DMA_MASK);
1946 if (err) {
1947 printk(KERN_ERR PFX "No usable DMA configuration, "
1948 "aborting.\n");
1949 goto err_out_free_res;
1950 }
1951
1952 err = pci_set_consistent_dma_mask(pdev, (u64) B44_DMA_MASK);
1953 if (err) {
1954 printk(KERN_ERR PFX "No usable DMA configuration, "
1955 "aborting.\n");
1956 goto err_out_free_res;
1957 }
1958
1959 b44reg_base = pci_resource_start(pdev, 0);
1960 b44reg_len = pci_resource_len(pdev, 0);
1961
1962 dev = alloc_etherdev(sizeof(*bp));
1963 if (!dev) {
1964 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1965 err = -ENOMEM;
1966 goto err_out_free_res;
1967 }
1968
1969 SET_MODULE_OWNER(dev);
1970 SET_NETDEV_DEV(dev,&pdev->dev);
1971
1972 /* No interesting netdevice features in this card... */
1973 dev->features |= 0;
1974
1975 bp = netdev_priv(dev);
1976 bp->pdev = pdev;
1977 bp->dev = dev;
1978
1979 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
1980
1981 spin_lock_init(&bp->lock);
1982
1983 bp->regs = ioremap(b44reg_base, b44reg_len);
1984 if (bp->regs == 0UL) {
1985 printk(KERN_ERR PFX "Cannot map device registers, "
1986 "aborting.\n");
1987 err = -ENOMEM;
1988 goto err_out_free_dev;
1989 }
1990
1991 bp->rx_pending = B44_DEF_RX_RING_PENDING;
1992 bp->tx_pending = B44_DEF_TX_RING_PENDING;
1993
1994 dev->open = b44_open;
1995 dev->stop = b44_close;
1996 dev->hard_start_xmit = b44_start_xmit;
1997 dev->get_stats = b44_get_stats;
1998 dev->set_multicast_list = b44_set_rx_mode;
1999 dev->set_mac_address = b44_set_mac_addr;
2000 dev->do_ioctl = b44_ioctl;
2001 dev->tx_timeout = b44_tx_timeout;
2002 dev->poll = b44_poll;
2003 dev->weight = 64;
2004 dev->watchdog_timeo = B44_TX_TIMEOUT;
2005 #ifdef CONFIG_NET_POLL_CONTROLLER
2006 dev->poll_controller = b44_poll_controller;
2007 #endif
2008 dev->change_mtu = b44_change_mtu;
2009 dev->irq = pdev->irq;
2010 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2011
2012 netif_carrier_off(dev);
2013
2014 err = b44_get_invariants(bp);
2015 if (err) {
2016 printk(KERN_ERR PFX "Problem fetching invariants of chip, "
2017 "aborting.\n");
2018 goto err_out_iounmap;
2019 }
2020
2021 bp->mii_if.dev = dev;
2022 bp->mii_if.mdio_read = b44_mii_read;
2023 bp->mii_if.mdio_write = b44_mii_write;
2024 bp->mii_if.phy_id = bp->phy_addr;
2025 bp->mii_if.phy_id_mask = 0x1f;
2026 bp->mii_if.reg_num_mask = 0x1f;
2027
2028 /* By default, advertise all speed/duplex settings. */
2029 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2030 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2031
2032 /* By default, auto-negotiate PAUSE. */
2033 bp->flags |= B44_FLAG_PAUSE_AUTO;
2034
2035 err = register_netdev(dev);
2036 if (err) {
2037 printk(KERN_ERR PFX "Cannot register net device, "
2038 "aborting.\n");
2039 goto err_out_iounmap;
2040 }
2041
2042 pci_set_drvdata(pdev, dev);
2043
2044 pci_save_state(bp->pdev);
2045
2046 /* Chip reset provides power to the b44 MAC & PCI cores, which
2047 * is necessary for MAC register access.
2048 */
2049 b44_chip_reset(bp);
2050
2051 printk(KERN_INFO "%s: Broadcom 4400 10/100BaseT Ethernet ", dev->name);
2052 for (i = 0; i < 6; i++)
2053 printk("%2.2x%c", dev->dev_addr[i],
2054 i == 5 ? '\n' : ':');
2055
2056 return 0;
2057
2058 err_out_iounmap:
2059 iounmap(bp->regs);
2060
2061 err_out_free_dev:
2062 free_netdev(dev);
2063
2064 err_out_free_res:
2065 pci_release_regions(pdev);
2066
2067 err_out_disable_pdev:
2068 pci_disable_device(pdev);
2069 pci_set_drvdata(pdev, NULL);
2070 return err;
2071 }
2072
2073 static void __devexit b44_remove_one(struct pci_dev *pdev)
2074 {
2075 struct net_device *dev = pci_get_drvdata(pdev);
2076 struct b44 *bp = netdev_priv(dev);
2077
2078 unregister_netdev(dev);
2079 iounmap(bp->regs);
2080 free_netdev(dev);
2081 pci_release_regions(pdev);
2082 pci_disable_device(pdev);
2083 pci_set_drvdata(pdev, NULL);
2084 }
2085
2086 static int b44_suspend(struct pci_dev *pdev, pm_message_t state)
2087 {
2088 struct net_device *dev = pci_get_drvdata(pdev);
2089 struct b44 *bp = netdev_priv(dev);
2090
2091 if (!netif_running(dev))
2092 return 0;
2093
2094 del_timer_sync(&bp->timer);
2095
2096 spin_lock_irq(&bp->lock);
2097
2098 b44_halt(bp);
2099 netif_carrier_off(bp->dev);
2100 netif_device_detach(bp->dev);
2101 b44_free_rings(bp);
2102
2103 spin_unlock_irq(&bp->lock);
2104
2105 free_irq(dev->irq, dev);
2106 pci_disable_device(pdev);
2107 return 0;
2108 }
2109
2110 static int b44_resume(struct pci_dev *pdev)
2111 {
2112 struct net_device *dev = pci_get_drvdata(pdev);
2113 struct b44 *bp = netdev_priv(dev);
2114
2115 pci_restore_state(pdev);
2116 pci_enable_device(pdev);
2117 pci_set_master(pdev);
2118
2119 if (!netif_running(dev))
2120 return 0;
2121
2122 if (request_irq(dev->irq, b44_interrupt, SA_SHIRQ, dev->name, dev))
2123 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2124
2125 spin_lock_irq(&bp->lock);
2126
2127 b44_init_rings(bp);
2128 b44_init_hw(bp);
2129 netif_device_attach(bp->dev);
2130 spin_unlock_irq(&bp->lock);
2131
2132 bp->timer.expires = jiffies + HZ;
2133 add_timer(&bp->timer);
2134
2135 b44_enable_ints(bp);
2136 netif_wake_queue(dev);
2137 return 0;
2138 }
2139
2140 static struct pci_driver b44_driver = {
2141 .name = DRV_MODULE_NAME,
2142 .id_table = b44_pci_tbl,
2143 .probe = b44_init_one,
2144 .remove = __devexit_p(b44_remove_one),
2145 .suspend = b44_suspend,
2146 .resume = b44_resume,
2147 };
2148
2149 static int __init b44_init(void)
2150 {
2151 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2152
2153 /* Setup paramaters for syncing RX/TX DMA descriptors */
2154 dma_desc_align_mask = ~(dma_desc_align_size - 1);
2155 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2156
2157 return pci_module_init(&b44_driver);
2158 }
2159
2160 static void __exit b44_cleanup(void)
2161 {
2162 pci_unregister_driver(&b44_driver);
2163 }
2164
2165 module_init(b44_init);
2166 module_exit(b44_cleanup);
2167
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree