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drivers/net: Remove pointless checks for NULL prior to calling kfree()
[linux-2.6/libata-dev.git] / drivers / net / b44.c
blob5485e3b1cd353c8ec76e72bec3923af6caec1de9
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 *
6 * Distribute under GPL.
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/types.h>
13 #include <linux/netdevice.h>
14 #include <linux/ethtool.h>
15 #include <linux/mii.h>
16 #include <linux/if_ether.h>
17 #include <linux/etherdevice.h>
18 #include <linux/pci.h>
19 #include <linux/delay.h>
20 #include <linux/init.h>
21 #include <linux/version.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 "0.95"
33 #define DRV_MODULE_RELDATE "Aug 3, 2004"
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 static int b44_poll(struct net_device *dev, int *budget);
106 #ifdef CONFIG_NET_POLL_CONTROLLER
107 static void b44_poll_controller(struct net_device *dev);
108 #endif
109
110 static int dma_desc_align_mask;
111 static int dma_desc_sync_size;
112
113 static inline void b44_sync_dma_desc_for_device(struct pci_dev *pdev,
114 dma_addr_t dma_base,
115 unsigned long offset,
116 enum dma_data_direction dir)
117 {
118 dma_sync_single_range_for_device(&pdev->dev, dma_base,
119 offset & dma_desc_align_mask,
120 dma_desc_sync_size, dir);
121 }
122
123 static inline void b44_sync_dma_desc_for_cpu(struct pci_dev *pdev,
124 dma_addr_t dma_base,
125 unsigned long offset,
126 enum dma_data_direction dir)
127 {
128 dma_sync_single_range_for_cpu(&pdev->dev, dma_base,
129 offset & dma_desc_align_mask,
130 dma_desc_sync_size, dir);
131 }
132
133 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
134 {
135 return readl(bp->regs + reg);
136 }
137
138 static inline void bw32(const struct b44 *bp,
139 unsigned long reg, unsigned long val)
140 {
141 writel(val, bp->regs + reg);
142 }
143
144 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
145 u32 bit, unsigned long timeout, const int clear)
146 {
147 unsigned long i;
148
149 for (i = 0; i < timeout; i++) {
150 u32 val = br32(bp, reg);
151
152 if (clear && !(val & bit))
153 break;
154 if (!clear && (val & bit))
155 break;
156 udelay(10);
157 }
158 if (i == timeout) {
159 printk(KERN_ERR PFX "%s: BUG! Timeout waiting for bit %08x of register "
160 "%lx to %s.\n",
161 bp->dev->name,
162 bit, reg,
163 (clear ? "clear" : "set"));
164 return -ENODEV;
165 }
166 return 0;
167 }
168
169 /* Sonics SiliconBackplane support routines. ROFL, you should see all the
170 * buzz words used on this company's website :-)
171 *
172 * All of these routines must be invoked with bp->lock held and
173 * interrupts disabled.
174 */
175
176 #define SB_PCI_DMA 0x40000000 /* Client Mode PCI memory access space (1 GB) */
177 #define BCM4400_PCI_CORE_ADDR 0x18002000 /* Address of PCI core on BCM4400 cards */
178
179 static u32 ssb_get_core_rev(struct b44 *bp)
180 {
181 return (br32(bp, B44_SBIDHIGH) & SBIDHIGH_RC_MASK);
182 }
183
184 static u32 ssb_pci_setup(struct b44 *bp, u32 cores)
185 {
186 u32 bar_orig, pci_rev, val;
187
188 pci_read_config_dword(bp->pdev, SSB_BAR0_WIN, &bar_orig);
189 pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, BCM4400_PCI_CORE_ADDR);
190 pci_rev = ssb_get_core_rev(bp);
191
192 val = br32(bp, B44_SBINTVEC);
193 val |= cores;
194 bw32(bp, B44_SBINTVEC, val);
195
196 val = br32(bp, SSB_PCI_TRANS_2);
197 val |= SSB_PCI_PREF | SSB_PCI_BURST;
198 bw32(bp, SSB_PCI_TRANS_2, val);
199
200 pci_write_config_dword(bp->pdev, SSB_BAR0_WIN, bar_orig);
201
202 return pci_rev;
203 }
204
205 static void ssb_core_disable(struct b44 *bp)
206 {
207 if (br32(bp, B44_SBTMSLOW) & SBTMSLOW_RESET)
208 return;
209
210 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_CLOCK));
211 b44_wait_bit(bp, B44_SBTMSLOW, SBTMSLOW_REJECT, 100000, 0);
212 b44_wait_bit(bp, B44_SBTMSHIGH, SBTMSHIGH_BUSY, 100000, 1);
213 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_FGC | SBTMSLOW_CLOCK |
214 SBTMSLOW_REJECT | SBTMSLOW_RESET));
215 br32(bp, B44_SBTMSLOW);
216 udelay(1);
217 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_REJECT | SBTMSLOW_RESET));
218 br32(bp, B44_SBTMSLOW);
219 udelay(1);
220 }
221
222 static void ssb_core_reset(struct b44 *bp)
223 {
224 u32 val;
225
226 ssb_core_disable(bp);
227 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_RESET | SBTMSLOW_CLOCK | SBTMSLOW_FGC));
228 br32(bp, B44_SBTMSLOW);
229 udelay(1);
230
231 /* Clear SERR if set, this is a hw bug workaround. */
232 if (br32(bp, B44_SBTMSHIGH) & SBTMSHIGH_SERR)
233 bw32(bp, B44_SBTMSHIGH, 0);
234
235 val = br32(bp, B44_SBIMSTATE);
236 if (val & (SBIMSTATE_IBE | SBIMSTATE_TO))
237 bw32(bp, B44_SBIMSTATE, val & ~(SBIMSTATE_IBE | SBIMSTATE_TO));
238
239 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK | SBTMSLOW_FGC));
240 br32(bp, B44_SBTMSLOW);
241 udelay(1);
242
243 bw32(bp, B44_SBTMSLOW, (SBTMSLOW_CLOCK));
244 br32(bp, B44_SBTMSLOW);
245 udelay(1);
246 }
247
248 static int ssb_core_unit(struct b44 *bp)
249 {
250 #if 0
251 u32 val = br32(bp, B44_SBADMATCH0);
252 u32 base;
253
254 type = val & SBADMATCH0_TYPE_MASK;
255 switch (type) {
256 case 0:
257 base = val & SBADMATCH0_BS0_MASK;
258 break;
259
260 case 1:
261 base = val & SBADMATCH0_BS1_MASK;
262 break;
263
264 case 2:
265 default:
266 base = val & SBADMATCH0_BS2_MASK;
267 break;
268 };
269 #endif
270 return 0;
271 }
272
273 static int ssb_is_core_up(struct b44 *bp)
274 {
275 return ((br32(bp, B44_SBTMSLOW) & (SBTMSLOW_RESET | SBTMSLOW_REJECT | SBTMSLOW_CLOCK))
276 == SBTMSLOW_CLOCK);
277 }
278
279 static void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
280 {
281 u32 val;
282
283 val = ((u32) data[2]) << 24;
284 val |= ((u32) data[3]) << 16;
285 val |= ((u32) data[4]) << 8;
286 val |= ((u32) data[5]) << 0;
287 bw32(bp, B44_CAM_DATA_LO, val);
288 val = (CAM_DATA_HI_VALID |
289 (((u32) data[0]) << 8) |
290 (((u32) data[1]) << 0));
291 bw32(bp, B44_CAM_DATA_HI, val);
292 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
293 (index << CAM_CTRL_INDEX_SHIFT)));
294 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
295 }
296
297 static inline void __b44_disable_ints(struct b44 *bp)
298 {
299 bw32(bp, B44_IMASK, 0);
300 }
301
302 static void b44_disable_ints(struct b44 *bp)
303 {
304 __b44_disable_ints(bp);
305
306 /* Flush posted writes. */
307 br32(bp, B44_IMASK);
308 }
309
310 static void b44_enable_ints(struct b44 *bp)
311 {
312 bw32(bp, B44_IMASK, bp->imask);
313 }
314
315 static int b44_readphy(struct b44 *bp, int reg, u32 *val)
316 {
317 int err;
318
319 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
320 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
321 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
322 (bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
323 (reg << MDIO_DATA_RA_SHIFT) |
324 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
325 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
326 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
327
328 return err;
329 }
330
331 static int b44_writephy(struct b44 *bp, int reg, u32 val)
332 {
333 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
334 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
335 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
336 (bp->phy_addr << MDIO_DATA_PMD_SHIFT) |
337 (reg << MDIO_DATA_RA_SHIFT) |
338 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
339 (val & MDIO_DATA_DATA)));
340 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
341 }
342
343 /* miilib interface */
344 /* FIXME FIXME: phy_id is ignored, bp->phy_addr use is unconditional
345 * due to code existing before miilib use was added to this driver.
346 * Someone should remove this artificial driver limitation in
347 * b44_{read,write}phy. bp->phy_addr itself is fine (and needed).
348 */
349 static int b44_mii_read(struct net_device *dev, int phy_id, int location)
350 {
351 u32 val;
352 struct b44 *bp = netdev_priv(dev);
353 int rc = b44_readphy(bp, location, &val);
354 if (rc)
355 return 0xffffffff;
356 return val;
357 }
358
359 static void b44_mii_write(struct net_device *dev, int phy_id, int location,
360 int val)
361 {
362 struct b44 *bp = netdev_priv(dev);
363 b44_writephy(bp, location, val);
364 }
365
366 static int b44_phy_reset(struct b44 *bp)
367 {
368 u32 val;
369 int err;
370
371 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
372 if (err)
373 return err;
374 udelay(100);
375 err = b44_readphy(bp, MII_BMCR, &val);
376 if (!err) {
377 if (val & BMCR_RESET) {
378 printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
379 bp->dev->name);
380 err = -ENODEV;
381 }
382 }
383
384 return 0;
385 }
386
387 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
388 {
389 u32 val;
390
391 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
392 bp->flags |= pause_flags;
393
394 val = br32(bp, B44_RXCONFIG);
395 if (pause_flags & B44_FLAG_RX_PAUSE)
396 val |= RXCONFIG_FLOW;
397 else
398 val &= ~RXCONFIG_FLOW;
399 bw32(bp, B44_RXCONFIG, val);
400
401 val = br32(bp, B44_MAC_FLOW);
402 if (pause_flags & B44_FLAG_TX_PAUSE)
403 val |= (MAC_FLOW_PAUSE_ENAB |
404 (0xc0 & MAC_FLOW_RX_HI_WATER));
405 else
406 val &= ~MAC_FLOW_PAUSE_ENAB;
407 bw32(bp, B44_MAC_FLOW, val);
408 }
409
410 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
411 {
412 u32 pause_enab = bp->flags & (B44_FLAG_TX_PAUSE |
413 B44_FLAG_RX_PAUSE);
414
415 if (local & ADVERTISE_PAUSE_CAP) {
416 if (local & ADVERTISE_PAUSE_ASYM) {
417 if (remote & LPA_PAUSE_CAP)
418 pause_enab |= (B44_FLAG_TX_PAUSE |
419 B44_FLAG_RX_PAUSE);
420 else if (remote & LPA_PAUSE_ASYM)
421 pause_enab |= B44_FLAG_RX_PAUSE;
422 } else {
423 if (remote & LPA_PAUSE_CAP)
424 pause_enab |= (B44_FLAG_TX_PAUSE |
425 B44_FLAG_RX_PAUSE);
426 }
427 } else if (local & ADVERTISE_PAUSE_ASYM) {
428 if ((remote & LPA_PAUSE_CAP) &&
429 (remote & LPA_PAUSE_ASYM))
430 pause_enab |= B44_FLAG_TX_PAUSE;
431 }
432
433 __b44_set_flow_ctrl(bp, pause_enab);
434 }
435
436 static int b44_setup_phy(struct b44 *bp)
437 {
438 u32 val;
439 int err;
440
441 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
442 goto out;
443 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
444 val & MII_ALEDCTRL_ALLMSK)) != 0)
445 goto out;
446 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
447 goto out;
448 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
449 val | MII_TLEDCTRL_ENABLE)) != 0)
450 goto out;
451
452 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
453 u32 adv = ADVERTISE_CSMA;
454
455 if (bp->flags & B44_FLAG_ADV_10HALF)
456 adv |= ADVERTISE_10HALF;
457 if (bp->flags & B44_FLAG_ADV_10FULL)
458 adv |= ADVERTISE_10FULL;
459 if (bp->flags & B44_FLAG_ADV_100HALF)
460 adv |= ADVERTISE_100HALF;
461 if (bp->flags & B44_FLAG_ADV_100FULL)
462 adv |= ADVERTISE_100FULL;
463
464 if (bp->flags & B44_FLAG_PAUSE_AUTO)
465 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
466
467 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
468 goto out;
469 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
470 BMCR_ANRESTART))) != 0)
471 goto out;
472 } else {
473 u32 bmcr;
474
475 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
476 goto out;
477 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
478 if (bp->flags & B44_FLAG_100_BASE_T)
479 bmcr |= BMCR_SPEED100;
480 if (bp->flags & B44_FLAG_FULL_DUPLEX)
481 bmcr |= BMCR_FULLDPLX;
482 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
483 goto out;
484
485 /* Since we will not be negotiating there is no safe way
486 * to determine if the link partner supports flow control
487 * or not. So just disable it completely in this case.
488 */
489 b44_set_flow_ctrl(bp, 0, 0);
490 }
491
492 out:
493 return err;
494 }
495
496 static void b44_stats_update(struct b44 *bp)
497 {
498 unsigned long reg;
499 u32 *val;
500
501 val = &bp->hw_stats.tx_good_octets;
502 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
503 *val++ += br32(bp, reg);
504 }
505 val = &bp->hw_stats.rx_good_octets;
506 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
507 *val++ += br32(bp, reg);
508 }
509 }
510
511 static void b44_link_report(struct b44 *bp)
512 {
513 if (!netif_carrier_ok(bp->dev)) {
514 printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
515 } else {
516 printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
517 bp->dev->name,
518 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
519 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
520
521 printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
522 "%s for RX.\n",
523 bp->dev->name,
524 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
525 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
526 }
527 }
528
529 static void b44_check_phy(struct b44 *bp)
530 {
531 u32 bmsr, aux;
532
533 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
534 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
535 (bmsr != 0xffff)) {
536 if (aux & MII_AUXCTRL_SPEED)
537 bp->flags |= B44_FLAG_100_BASE_T;
538 else
539 bp->flags &= ~B44_FLAG_100_BASE_T;
540 if (aux & MII_AUXCTRL_DUPLEX)
541 bp->flags |= B44_FLAG_FULL_DUPLEX;
542 else
543 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
544
545 if (!netif_carrier_ok(bp->dev) &&
546 (bmsr & BMSR_LSTATUS)) {
547 u32 val = br32(bp, B44_TX_CTRL);
548 u32 local_adv, remote_adv;
549
550 if (bp->flags & B44_FLAG_FULL_DUPLEX)
551 val |= TX_CTRL_DUPLEX;
552 else
553 val &= ~TX_CTRL_DUPLEX;
554 bw32(bp, B44_TX_CTRL, val);
555
556 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
557 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
558 !b44_readphy(bp, MII_LPA, &remote_adv))
559 b44_set_flow_ctrl(bp, local_adv, remote_adv);
560
561 /* Link now up */
562 netif_carrier_on(bp->dev);
563 b44_link_report(bp);
564 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
565 /* Link now down */
566 netif_carrier_off(bp->dev);
567 b44_link_report(bp);
568 }
569
570 if (bmsr & BMSR_RFAULT)
571 printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
572 bp->dev->name);
573 if (bmsr & BMSR_JCD)
574 printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
575 bp->dev->name);
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 bp->timer.expires = jiffies + HZ;
592 add_timer(&bp->timer);
593 }
594
595 static void b44_tx(struct b44 *bp)
596 {
597 u32 cur, cons;
598
599 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
600 cur /= sizeof(struct dma_desc);
601
602 /* XXX needs updating when NETIF_F_SG is supported */
603 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
604 struct ring_info *rp = &bp->tx_buffers[cons];
605 struct sk_buff *skb = rp->skb;
606
607 if (unlikely(skb == NULL))
608 BUG();
609
610 pci_unmap_single(bp->pdev,
611 pci_unmap_addr(rp, mapping),
612 skb->len,
613 PCI_DMA_TODEVICE);
614 rp->skb = NULL;
615 dev_kfree_skb_irq(skb);
616 }
617
618 bp->tx_cons = cons;
619 if (netif_queue_stopped(bp->dev) &&
620 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
621 netif_wake_queue(bp->dev);
622
623 bw32(bp, B44_GPTIMER, 0);
624 }
625
626 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
627 * before the DMA address you give it. So we allocate 30 more bytes
628 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
629 * point the chip at 30 bytes past where the rx_header will go.
630 */
631 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
632 {
633 struct dma_desc *dp;
634 struct ring_info *src_map, *map;
635 struct rx_header *rh;
636 struct sk_buff *skb;
637 dma_addr_t mapping;
638 int dest_idx;
639 u32 ctrl;
640
641 src_map = NULL;
642 if (src_idx >= 0)
643 src_map = &bp->rx_buffers[src_idx];
644 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
645 map = &bp->rx_buffers[dest_idx];
646 skb = dev_alloc_skb(RX_PKT_BUF_SZ);
647 if (skb == NULL)
648 return -ENOMEM;
649
650 mapping = pci_map_single(bp->pdev, skb->data,
651 RX_PKT_BUF_SZ,
652 PCI_DMA_FROMDEVICE);
653
654 /* Hardware bug work-around, the chip is unable to do PCI DMA
655 to/from anything above 1GB :-( */
656 if(mapping+RX_PKT_BUF_SZ > B44_DMA_MASK) {
657 /* Sigh... */
658 pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
659 dev_kfree_skb_any(skb);
660 skb = __dev_alloc_skb(RX_PKT_BUF_SZ,GFP_DMA);
661 if (skb == NULL)
662 return -ENOMEM;
663 mapping = pci_map_single(bp->pdev, skb->data,
664 RX_PKT_BUF_SZ,
665 PCI_DMA_FROMDEVICE);
666 if(mapping+RX_PKT_BUF_SZ > B44_DMA_MASK) {
667 pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE);
668 dev_kfree_skb_any(skb);
669 return -ENOMEM;
670 }
671 }
672
673 skb->dev = bp->dev;
674 skb_reserve(skb, bp->rx_offset);
675
676 rh = (struct rx_header *)
677 (skb->data - bp->rx_offset);
678 rh->len = 0;
679 rh->flags = 0;
680
681 map->skb = skb;
682 pci_unmap_addr_set(map, mapping, mapping);
683
684 if (src_map != NULL)
685 src_map->skb = NULL;
686
687 ctrl = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - bp->rx_offset));
688 if (dest_idx == (B44_RX_RING_SIZE - 1))
689 ctrl |= DESC_CTRL_EOT;
690
691 dp = &bp->rx_ring[dest_idx];
692 dp->ctrl = cpu_to_le32(ctrl);
693 dp->addr = cpu_to_le32((u32) mapping + bp->rx_offset + bp->dma_offset);
694
695 if (bp->flags & B44_FLAG_RX_RING_HACK)
696 b44_sync_dma_desc_for_device(bp->pdev, bp->rx_ring_dma,
697 dest_idx * sizeof(dp),
698 DMA_BIDIRECTIONAL);
699
700 return RX_PKT_BUF_SZ;
701 }
702
703 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
704 {
705 struct dma_desc *src_desc, *dest_desc;
706 struct ring_info *src_map, *dest_map;
707 struct rx_header *rh;
708 int dest_idx;
709 u32 ctrl;
710
711 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
712 dest_desc = &bp->rx_ring[dest_idx];
713 dest_map = &bp->rx_buffers[dest_idx];
714 src_desc = &bp->rx_ring[src_idx];
715 src_map = &bp->rx_buffers[src_idx];
716
717 dest_map->skb = src_map->skb;
718 rh = (struct rx_header *) src_map->skb->data;
719 rh->len = 0;
720 rh->flags = 0;
721 pci_unmap_addr_set(dest_map, mapping,
722 pci_unmap_addr(src_map, mapping));
723
724 if (bp->flags & B44_FLAG_RX_RING_HACK)
725 b44_sync_dma_desc_for_cpu(bp->pdev, 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->pdev, bp->rx_ring_dma,
742 dest_idx * sizeof(dest_desc),
743 DMA_BIDIRECTIONAL);
744
745 pci_dma_sync_single_for_device(bp->pdev, src_desc->addr,
746 RX_PKT_BUF_SZ,
747 PCI_DMA_FROMDEVICE);
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 = pci_unmap_addr(rp, mapping);
764 struct rx_header *rh;
765 u16 len;
766
767 pci_dma_sync_single_for_cpu(bp->pdev, map,
768 RX_PKT_BUF_SZ,
769 PCI_DMA_FROMDEVICE);
770 rh = (struct rx_header *) skb->data;
771 len = cpu_to_le16(rh->len);
772 if ((len > (RX_PKT_BUF_SZ - bp->rx_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->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 = cpu_to_le16(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 (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 pci_unmap_single(bp->pdev, map,
802 skb_size, PCI_DMA_FROMDEVICE);
803 /* Leave out rx_header */
804 skb_put(skb, len+bp->rx_offset);
805 skb_pull(skb,bp->rx_offset);
806 } else {
807 struct sk_buff *copy_skb;
808
809 b44_recycle_rx(bp, cons, bp->rx_prod);
810 copy_skb = dev_alloc_skb(len + 2);
811 if (copy_skb == NULL)
812 goto drop_it_no_recycle;
813
814 copy_skb->dev = bp->dev;
815 skb_reserve(copy_skb, 2);
816 skb_put(copy_skb, len);
817 /* DMA sync done above, copy just the actual packet */
818 memcpy(copy_skb->data, skb->data+bp->rx_offset, len);
819
820 skb = copy_skb;
821 }
822 skb->ip_summed = CHECKSUM_NONE;
823 skb->protocol = eth_type_trans(skb, bp->dev);
824 netif_receive_skb(skb);
825 bp->dev->last_rx = jiffies;
826 received++;
827 budget--;
828 next_pkt:
829 bp->rx_prod = (bp->rx_prod + 1) &
830 (B44_RX_RING_SIZE - 1);
831 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
832 }
833
834 bp->rx_cons = cons;
835 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
836
837 return received;
838 }
839
840 static int b44_poll(struct net_device *netdev, int *budget)
841 {
842 struct b44 *bp = netdev_priv(netdev);
843 int done;
844
845 spin_lock_irq(&bp->lock);
846
847 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
848 /* spin_lock(&bp->tx_lock); */
849 b44_tx(bp);
850 /* spin_unlock(&bp->tx_lock); */
851 }
852 spin_unlock_irq(&bp->lock);
853
854 done = 1;
855 if (bp->istat & ISTAT_RX) {
856 int orig_budget = *budget;
857 int work_done;
858
859 if (orig_budget > netdev->quota)
860 orig_budget = netdev->quota;
861
862 work_done = b44_rx(bp, orig_budget);
863
864 *budget -= work_done;
865 netdev->quota -= work_done;
866
867 if (work_done >= orig_budget)
868 done = 0;
869 }
870
871 if (bp->istat & ISTAT_ERRORS) {
872 spin_lock_irq(&bp->lock);
873 b44_halt(bp);
874 b44_init_rings(bp);
875 b44_init_hw(bp);
876 netif_wake_queue(bp->dev);
877 spin_unlock_irq(&bp->lock);
878 done = 1;
879 }
880
881 if (done) {
882 netif_rx_complete(netdev);
883 b44_enable_ints(bp);
884 }
885
886 return (done ? 0 : 1);
887 }
888
889 static irqreturn_t b44_interrupt(int irq, void *dev_id, struct pt_regs *regs)
890 {
891 struct net_device *dev = dev_id;
892 struct b44 *bp = netdev_priv(dev);
893 unsigned long flags;
894 u32 istat, imask;
895 int handled = 0;
896
897 spin_lock_irqsave(&bp->lock, flags);
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 if (netif_rx_schedule_prep(dev)) {
909 /* NOTE: These writes are posted by the readback of
910 * the ISTAT register below.
911 */
912 bp->istat = istat;
913 __b44_disable_ints(bp);
914 __netif_rx_schedule(dev);
915 } else {
916 printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
917 dev->name);
918 }
919
920 bw32(bp, B44_ISTAT, istat);
921 br32(bp, B44_ISTAT);
922 }
923 spin_unlock_irqrestore(&bp->lock, flags);
924 return IRQ_RETVAL(handled);
925 }
926
927 static void b44_tx_timeout(struct net_device *dev)
928 {
929 struct b44 *bp = netdev_priv(dev);
930
931 printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
932 dev->name);
933
934 spin_lock_irq(&bp->lock);
935
936 b44_halt(bp);
937 b44_init_rings(bp);
938 b44_init_hw(bp);
939
940 spin_unlock_irq(&bp->lock);
941
942 b44_enable_ints(bp);
943
944 netif_wake_queue(dev);
945 }
946
947 static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
948 {
949 struct b44 *bp = netdev_priv(dev);
950 struct sk_buff *bounce_skb;
951 dma_addr_t mapping;
952 u32 len, entry, ctrl;
953
954 len = skb->len;
955 spin_lock_irq(&bp->lock);
956
957 /* This is a hard error, log it. */
958 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
959 netif_stop_queue(dev);
960 spin_unlock_irq(&bp->lock);
961 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
962 dev->name);
963 return 1;
964 }
965
966 mapping = pci_map_single(bp->pdev, skb->data, len, PCI_DMA_TODEVICE);
967 if(mapping+len > B44_DMA_MASK) {
968 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
969 pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE);
970
971 bounce_skb = __dev_alloc_skb(TX_PKT_BUF_SZ,
972 GFP_ATOMIC|GFP_DMA);
973 if (!bounce_skb)
974 return NETDEV_TX_BUSY;
975
976 mapping = pci_map_single(bp->pdev, bounce_skb->data,
977 len, PCI_DMA_TODEVICE);
978 if(mapping+len > B44_DMA_MASK) {
979 pci_unmap_single(bp->pdev, mapping,
980 len, PCI_DMA_TODEVICE);
981 dev_kfree_skb_any(bounce_skb);
982 return NETDEV_TX_BUSY;
983 }
984
985 memcpy(skb_put(bounce_skb, len), skb->data, skb->len);
986 dev_kfree_skb_any(skb);
987 skb = bounce_skb;
988 }
989
990 entry = bp->tx_prod;
991 bp->tx_buffers[entry].skb = skb;
992 pci_unmap_addr_set(&bp->tx_buffers[entry], mapping, mapping);
993
994 ctrl = (len & DESC_CTRL_LEN);
995 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
996 if (entry == (B44_TX_RING_SIZE - 1))
997 ctrl |= DESC_CTRL_EOT;
998
999 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1000 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1001
1002 if (bp->flags & B44_FLAG_TX_RING_HACK)
1003 b44_sync_dma_desc_for_device(bp->pdev, bp->tx_ring_dma,
1004 entry * sizeof(bp->tx_ring[0]),
1005 DMA_TO_DEVICE);
1006
1007 entry = NEXT_TX(entry);
1008
1009 bp->tx_prod = entry;
1010
1011 wmb();
1012
1013 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1014 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1015 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1016 if (bp->flags & B44_FLAG_REORDER_BUG)
1017 br32(bp, B44_DMATX_PTR);
1018
1019 if (TX_BUFFS_AVAIL(bp) < 1)
1020 netif_stop_queue(dev);
1021
1022 spin_unlock_irq(&bp->lock);
1023
1024 dev->trans_start = jiffies;
1025
1026 return 0;
1027 }
1028
1029 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1030 {
1031 struct b44 *bp = netdev_priv(dev);
1032
1033 if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1034 return -EINVAL;
1035
1036 if (!netif_running(dev)) {
1037 /* We'll just catch it later when the
1038 * device is up'd.
1039 */
1040 dev->mtu = new_mtu;
1041 return 0;
1042 }
1043
1044 spin_lock_irq(&bp->lock);
1045 b44_halt(bp);
1046 dev->mtu = new_mtu;
1047 b44_init_rings(bp);
1048 b44_init_hw(bp);
1049 spin_unlock_irq(&bp->lock);
1050
1051 b44_enable_ints(bp);
1052
1053 return 0;
1054 }
1055
1056 /* Free up pending packets in all rx/tx rings.
1057 *
1058 * The chip has been shut down and the driver detached from
1059 * the networking, so no interrupts or new tx packets will
1060 * end up in the driver. bp->lock is not held and we are not
1061 * in an interrupt context and thus may sleep.
1062 */
1063 static void b44_free_rings(struct b44 *bp)
1064 {
1065 struct ring_info *rp;
1066 int i;
1067
1068 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1069 rp = &bp->rx_buffers[i];
1070
1071 if (rp->skb == NULL)
1072 continue;
1073 pci_unmap_single(bp->pdev,
1074 pci_unmap_addr(rp, mapping),
1075 RX_PKT_BUF_SZ,
1076 PCI_DMA_FROMDEVICE);
1077 dev_kfree_skb_any(rp->skb);
1078 rp->skb = NULL;
1079 }
1080
1081 /* XXX needs changes once NETIF_F_SG is set... */
1082 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1083 rp = &bp->tx_buffers[i];
1084
1085 if (rp->skb == NULL)
1086 continue;
1087 pci_unmap_single(bp->pdev,
1088 pci_unmap_addr(rp, mapping),
1089 rp->skb->len,
1090 PCI_DMA_TODEVICE);
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. bp->lock is not held and we are not
1101 * in an interrupt context and thus may sleep.
1102 */
1103 static void b44_init_rings(struct b44 *bp)
1104 {
1105 int i;
1106
1107 b44_free_rings(bp);
1108
1109 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1110 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1111
1112 if (bp->flags & B44_FLAG_RX_RING_HACK)
1113 dma_sync_single_for_device(&bp->pdev->dev, bp->rx_ring_dma,
1114 DMA_TABLE_BYTES,
1115 PCI_DMA_BIDIRECTIONAL);
1116
1117 if (bp->flags & B44_FLAG_TX_RING_HACK)
1118 dma_sync_single_for_device(&bp->pdev->dev, bp->tx_ring_dma,
1119 DMA_TABLE_BYTES,
1120 PCI_DMA_TODEVICE);
1121
1122 for (i = 0; i < bp->rx_pending; i++) {
1123 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1124 break;
1125 }
1126 }
1127
1128 /*
1129 * Must not be invoked with interrupt sources disabled and
1130 * the hardware shutdown down.
1131 */
1132 static void b44_free_consistent(struct b44 *bp)
1133 {
1134 kfree(bp->rx_buffers);
1135 bp->rx_buffers = NULL;
1136 kfree(bp->tx_buffers);
1137 bp->tx_buffers = NULL;
1138 if (bp->rx_ring) {
1139 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1140 dma_unmap_single(&bp->pdev->dev, bp->rx_ring_dma,
1141 DMA_TABLE_BYTES,
1142 DMA_BIDIRECTIONAL);
1143 kfree(bp->rx_ring);
1144 } else
1145 pci_free_consistent(bp->pdev, DMA_TABLE_BYTES,
1146 bp->rx_ring, bp->rx_ring_dma);
1147 bp->rx_ring = NULL;
1148 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1149 }
1150 if (bp->tx_ring) {
1151 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1152 dma_unmap_single(&bp->pdev->dev, bp->tx_ring_dma,
1153 DMA_TABLE_BYTES,
1154 DMA_TO_DEVICE);
1155 kfree(bp->tx_ring);
1156 } else
1157 pci_free_consistent(bp->pdev, DMA_TABLE_BYTES,
1158 bp->tx_ring, bp->tx_ring_dma);
1159 bp->tx_ring = NULL;
1160 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1161 }
1162 }
1163
1164 /*
1165 * Must not be invoked with interrupt sources disabled and
1166 * the hardware shutdown down. Can sleep.
1167 */
1168 static int b44_alloc_consistent(struct b44 *bp)
1169 {
1170 int size;
1171
1172 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1173 bp->rx_buffers = kmalloc(size, GFP_KERNEL);
1174 if (!bp->rx_buffers)
1175 goto out_err;
1176 memset(bp->rx_buffers, 0, size);
1177
1178 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1179 bp->tx_buffers = kmalloc(size, GFP_KERNEL);
1180 if (!bp->tx_buffers)
1181 goto out_err;
1182 memset(bp->tx_buffers, 0, size);
1183
1184 size = DMA_TABLE_BYTES;
1185 bp->rx_ring = pci_alloc_consistent(bp->pdev, size, &bp->rx_ring_dma);
1186 if (!bp->rx_ring) {
1187 /* Allocation may have failed due to pci_alloc_consistent
1188 insisting on use of GFP_DMA, which is more restrictive
1189 than necessary... */
1190 struct dma_desc *rx_ring;
1191 dma_addr_t rx_ring_dma;
1192
1193 if (!(rx_ring = (struct dma_desc *)kmalloc(size, GFP_KERNEL)))
1194 goto out_err;
1195
1196 memset(rx_ring, 0, size);
1197 rx_ring_dma = dma_map_single(&bp->pdev->dev, rx_ring,
1198 DMA_TABLE_BYTES,
1199 DMA_BIDIRECTIONAL);
1200
1201 if (rx_ring_dma + size > B44_DMA_MASK) {
1202 kfree(rx_ring);
1203 goto out_err;
1204 }
1205
1206 bp->rx_ring = rx_ring;
1207 bp->rx_ring_dma = rx_ring_dma;
1208 bp->flags |= B44_FLAG_RX_RING_HACK;
1209 }
1210
1211 bp->tx_ring = pci_alloc_consistent(bp->pdev, size, &bp->tx_ring_dma);
1212 if (!bp->tx_ring) {
1213 /* Allocation may have failed due to pci_alloc_consistent
1214 insisting on use of GFP_DMA, which is more restrictive
1215 than necessary... */
1216 struct dma_desc *tx_ring;
1217 dma_addr_t tx_ring_dma;
1218
1219 if (!(tx_ring = (struct dma_desc *)kmalloc(size, GFP_KERNEL)))
1220 goto out_err;
1221
1222 memset(tx_ring, 0, size);
1223 tx_ring_dma = dma_map_single(&bp->pdev->dev, tx_ring,
1224 DMA_TABLE_BYTES,
1225 DMA_TO_DEVICE);
1226
1227 if (tx_ring_dma + size > B44_DMA_MASK) {
1228 kfree(tx_ring);
1229 goto out_err;
1230 }
1231
1232 bp->tx_ring = tx_ring;
1233 bp->tx_ring_dma = tx_ring_dma;
1234 bp->flags |= B44_FLAG_TX_RING_HACK;
1235 }
1236
1237 return 0;
1238
1239 out_err:
1240 b44_free_consistent(bp);
1241 return -ENOMEM;
1242 }
1243
1244 /* bp->lock is held. */
1245 static void b44_clear_stats(struct b44 *bp)
1246 {
1247 unsigned long reg;
1248
1249 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1250 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1251 br32(bp, reg);
1252 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1253 br32(bp, reg);
1254 }
1255
1256 /* bp->lock is held. */
1257 static void b44_chip_reset(struct b44 *bp)
1258 {
1259 if (ssb_is_core_up(bp)) {
1260 bw32(bp, B44_RCV_LAZY, 0);
1261 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1262 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 100, 1);
1263 bw32(bp, B44_DMATX_CTRL, 0);
1264 bp->tx_prod = bp->tx_cons = 0;
1265 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1266 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1267 100, 0);
1268 }
1269 bw32(bp, B44_DMARX_CTRL, 0);
1270 bp->rx_prod = bp->rx_cons = 0;
1271 } else {
1272 ssb_pci_setup(bp, (bp->core_unit == 0 ?
1273 SBINTVEC_ENET0 :
1274 SBINTVEC_ENET1));
1275 }
1276
1277 ssb_core_reset(bp);
1278
1279 b44_clear_stats(bp);
1280
1281 /* Make PHY accessible. */
1282 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1283 (0x0d & MDIO_CTRL_MAXF_MASK)));
1284 br32(bp, B44_MDIO_CTRL);
1285
1286 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1287 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1288 br32(bp, B44_ENET_CTRL);
1289 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1290 } else {
1291 u32 val = br32(bp, B44_DEVCTRL);
1292
1293 if (val & DEVCTRL_EPR) {
1294 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1295 br32(bp, B44_DEVCTRL);
1296 udelay(100);
1297 }
1298 bp->flags |= B44_FLAG_INTERNAL_PHY;
1299 }
1300 }
1301
1302 /* bp->lock is held. */
1303 static void b44_halt(struct b44 *bp)
1304 {
1305 b44_disable_ints(bp);
1306 b44_chip_reset(bp);
1307 }
1308
1309 /* bp->lock is held. */
1310 static void __b44_set_mac_addr(struct b44 *bp)
1311 {
1312 bw32(bp, B44_CAM_CTRL, 0);
1313 if (!(bp->dev->flags & IFF_PROMISC)) {
1314 u32 val;
1315
1316 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1317 val = br32(bp, B44_CAM_CTRL);
1318 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1319 }
1320 }
1321
1322 static int b44_set_mac_addr(struct net_device *dev, void *p)
1323 {
1324 struct b44 *bp = netdev_priv(dev);
1325 struct sockaddr *addr = p;
1326
1327 if (netif_running(dev))
1328 return -EBUSY;
1329
1330 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1331
1332 spin_lock_irq(&bp->lock);
1333 __b44_set_mac_addr(bp);
1334 spin_unlock_irq(&bp->lock);
1335
1336 return 0;
1337 }
1338
1339 /* Called at device open time to get the chip ready for
1340 * packet processing. Invoked with bp->lock held.
1341 */
1342 static void __b44_set_rx_mode(struct net_device *);
1343 static void b44_init_hw(struct b44 *bp)
1344 {
1345 u32 val;
1346
1347 b44_chip_reset(bp);
1348 b44_phy_reset(bp);
1349 b44_setup_phy(bp);
1350
1351 /* Enable CRC32, set proper LED modes and power on PHY */
1352 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1353 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1354
1355 /* This sets the MAC address too. */
1356 __b44_set_rx_mode(bp->dev);
1357
1358 /* MTU + eth header + possible VLAN tag + struct rx_header */
1359 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1360 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1361
1362 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1363 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1364 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1365 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1366 (bp->rx_offset << DMARX_CTRL_ROSHIFT)));
1367 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1368
1369 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1370 bp->rx_prod = bp->rx_pending;
1371
1372 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1373
1374 val = br32(bp, B44_ENET_CTRL);
1375 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1376 }
1377
1378 static int b44_open(struct net_device *dev)
1379 {
1380 struct b44 *bp = netdev_priv(dev);
1381 int err;
1382
1383 err = b44_alloc_consistent(bp);
1384 if (err)
1385 return err;
1386
1387 err = request_irq(dev->irq, b44_interrupt, SA_SHIRQ, dev->name, dev);
1388 if (err)
1389 goto err_out_free;
1390
1391 spin_lock_irq(&bp->lock);
1392
1393 b44_init_rings(bp);
1394 b44_init_hw(bp);
1395 bp->flags |= B44_FLAG_INIT_COMPLETE;
1396
1397 netif_carrier_off(dev);
1398 b44_check_phy(bp);
1399
1400 spin_unlock_irq(&bp->lock);
1401
1402 init_timer(&bp->timer);
1403 bp->timer.expires = jiffies + HZ;
1404 bp->timer.data = (unsigned long) bp;
1405 bp->timer.function = b44_timer;
1406 add_timer(&bp->timer);
1407
1408 b44_enable_ints(bp);
1409
1410 return 0;
1411
1412 err_out_free:
1413 b44_free_consistent(bp);
1414 return err;
1415 }
1416
1417 #if 0
1418 /*static*/ void b44_dump_state(struct b44 *bp)
1419 {
1420 u32 val32, val32_2, val32_3, val32_4, val32_5;
1421 u16 val16;
1422
1423 pci_read_config_word(bp->pdev, PCI_STATUS, &val16);
1424 printk("DEBUG: PCI status [%04x] \n", val16);
1425
1426 }
1427 #endif
1428
1429 #ifdef CONFIG_NET_POLL_CONTROLLER
1430 /*
1431 * Polling receive - used by netconsole and other diagnostic tools
1432 * to allow network i/o with interrupts disabled.
1433 */
1434 static void b44_poll_controller(struct net_device *dev)
1435 {
1436 disable_irq(dev->irq);
1437 b44_interrupt(dev->irq, dev, NULL);
1438 enable_irq(dev->irq);
1439 }
1440 #endif
1441
1442 static int b44_close(struct net_device *dev)
1443 {
1444 struct b44 *bp = netdev_priv(dev);
1445
1446 netif_stop_queue(dev);
1447
1448 del_timer_sync(&bp->timer);
1449
1450 spin_lock_irq(&bp->lock);
1451
1452 #if 0
1453 b44_dump_state(bp);
1454 #endif
1455 b44_halt(bp);
1456 b44_free_rings(bp);
1457 bp->flags &= ~B44_FLAG_INIT_COMPLETE;
1458 netif_carrier_off(bp->dev);
1459
1460 spin_unlock_irq(&bp->lock);
1461
1462 free_irq(dev->irq, dev);
1463
1464 b44_free_consistent(bp);
1465
1466 return 0;
1467 }
1468
1469 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1470 {
1471 struct b44 *bp = netdev_priv(dev);
1472 struct net_device_stats *nstat = &bp->stats;
1473 struct b44_hw_stats *hwstat = &bp->hw_stats;
1474
1475 /* Convert HW stats into netdevice stats. */
1476 nstat->rx_packets = hwstat->rx_pkts;
1477 nstat->tx_packets = hwstat->tx_pkts;
1478 nstat->rx_bytes = hwstat->rx_octets;
1479 nstat->tx_bytes = hwstat->tx_octets;
1480 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1481 hwstat->tx_oversize_pkts +
1482 hwstat->tx_underruns +
1483 hwstat->tx_excessive_cols +
1484 hwstat->tx_late_cols);
1485 nstat->multicast = hwstat->tx_multicast_pkts;
1486 nstat->collisions = hwstat->tx_total_cols;
1487
1488 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1489 hwstat->rx_undersize);
1490 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1491 nstat->rx_frame_errors = hwstat->rx_align_errs;
1492 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1493 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1494 hwstat->rx_oversize_pkts +
1495 hwstat->rx_missed_pkts +
1496 hwstat->rx_crc_align_errs +
1497 hwstat->rx_undersize +
1498 hwstat->rx_crc_errs +
1499 hwstat->rx_align_errs +
1500 hwstat->rx_symbol_errs);
1501
1502 nstat->tx_aborted_errors = hwstat->tx_underruns;
1503 #if 0
1504 /* Carrier lost counter seems to be broken for some devices */
1505 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1506 #endif
1507
1508 return nstat;
1509 }
1510
1511 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1512 {
1513 struct dev_mc_list *mclist;
1514 int i, num_ents;
1515
1516 num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1517 mclist = dev->mc_list;
1518 for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1519 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1520 }
1521 return i+1;
1522 }
1523
1524 static void __b44_set_rx_mode(struct net_device *dev)
1525 {
1526 struct b44 *bp = netdev_priv(dev);
1527 u32 val;
1528 int i=0;
1529 unsigned char zero[6] = {0,0,0,0,0,0};
1530
1531 val = br32(bp, B44_RXCONFIG);
1532 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1533 if (dev->flags & IFF_PROMISC) {
1534 val |= RXCONFIG_PROMISC;
1535 bw32(bp, B44_RXCONFIG, val);
1536 } else {
1537 __b44_set_mac_addr(bp);
1538
1539 if (dev->flags & IFF_ALLMULTI)
1540 val |= RXCONFIG_ALLMULTI;
1541 else
1542 i=__b44_load_mcast(bp, dev);
1543
1544 for(;i<64;i++) {
1545 __b44_cam_write(bp, zero, i);
1546 }
1547 bw32(bp, B44_RXCONFIG, val);
1548 val = br32(bp, B44_CAM_CTRL);
1549 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1550 }
1551 }
1552
1553 static void b44_set_rx_mode(struct net_device *dev)
1554 {
1555 struct b44 *bp = netdev_priv(dev);
1556
1557 spin_lock_irq(&bp->lock);
1558 __b44_set_rx_mode(dev);
1559 spin_unlock_irq(&bp->lock);
1560 }
1561
1562 static u32 b44_get_msglevel(struct net_device *dev)
1563 {
1564 struct b44 *bp = netdev_priv(dev);
1565 return bp->msg_enable;
1566 }
1567
1568 static void b44_set_msglevel(struct net_device *dev, u32 value)
1569 {
1570 struct b44 *bp = netdev_priv(dev);
1571 bp->msg_enable = value;
1572 }
1573
1574 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1575 {
1576 struct b44 *bp = netdev_priv(dev);
1577 struct pci_dev *pci_dev = bp->pdev;
1578
1579 strcpy (info->driver, DRV_MODULE_NAME);
1580 strcpy (info->version, DRV_MODULE_VERSION);
1581 strcpy (info->bus_info, pci_name(pci_dev));
1582 }
1583
1584 static int b44_nway_reset(struct net_device *dev)
1585 {
1586 struct b44 *bp = netdev_priv(dev);
1587 u32 bmcr;
1588 int r;
1589
1590 spin_lock_irq(&bp->lock);
1591 b44_readphy(bp, MII_BMCR, &bmcr);
1592 b44_readphy(bp, MII_BMCR, &bmcr);
1593 r = -EINVAL;
1594 if (bmcr & BMCR_ANENABLE) {
1595 b44_writephy(bp, MII_BMCR,
1596 bmcr | BMCR_ANRESTART);
1597 r = 0;
1598 }
1599 spin_unlock_irq(&bp->lock);
1600
1601 return r;
1602 }
1603
1604 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1605 {
1606 struct b44 *bp = netdev_priv(dev);
1607
1608 if (!(bp->flags & B44_FLAG_INIT_COMPLETE))
1609 return -EAGAIN;
1610 cmd->supported = (SUPPORTED_Autoneg);
1611 cmd->supported |= (SUPPORTED_100baseT_Half |
1612 SUPPORTED_100baseT_Full |
1613 SUPPORTED_10baseT_Half |
1614 SUPPORTED_10baseT_Full |
1615 SUPPORTED_MII);
1616
1617 cmd->advertising = 0;
1618 if (bp->flags & B44_FLAG_ADV_10HALF)
1619 cmd->advertising |= ADVERTISED_10baseT_Half;
1620 if (bp->flags & B44_FLAG_ADV_10FULL)
1621 cmd->advertising |= ADVERTISED_10baseT_Full;
1622 if (bp->flags & B44_FLAG_ADV_100HALF)
1623 cmd->advertising |= ADVERTISED_100baseT_Half;
1624 if (bp->flags & B44_FLAG_ADV_100FULL)
1625 cmd->advertising |= ADVERTISED_100baseT_Full;
1626 cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1627 cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1628 SPEED_100 : SPEED_10;
1629 cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1630 DUPLEX_FULL : DUPLEX_HALF;
1631 cmd->port = 0;
1632 cmd->phy_address = bp->phy_addr;
1633 cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1634 XCVR_INTERNAL : XCVR_EXTERNAL;
1635 cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1636 AUTONEG_DISABLE : AUTONEG_ENABLE;
1637 cmd->maxtxpkt = 0;
1638 cmd->maxrxpkt = 0;
1639 return 0;
1640 }
1641
1642 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1643 {
1644 struct b44 *bp = netdev_priv(dev);
1645
1646 if (!(bp->flags & B44_FLAG_INIT_COMPLETE))
1647 return -EAGAIN;
1648
1649 /* We do not support gigabit. */
1650 if (cmd->autoneg == AUTONEG_ENABLE) {
1651 if (cmd->advertising &
1652 (ADVERTISED_1000baseT_Half |
1653 ADVERTISED_1000baseT_Full))
1654 return -EINVAL;
1655 } else if ((cmd->speed != SPEED_100 &&
1656 cmd->speed != SPEED_10) ||
1657 (cmd->duplex != DUPLEX_HALF &&
1658 cmd->duplex != DUPLEX_FULL)) {
1659 return -EINVAL;
1660 }
1661
1662 spin_lock_irq(&bp->lock);
1663
1664 if (cmd->autoneg == AUTONEG_ENABLE) {
1665 bp->flags &= ~B44_FLAG_FORCE_LINK;
1666 bp->flags &= ~(B44_FLAG_ADV_10HALF |
1667 B44_FLAG_ADV_10FULL |
1668 B44_FLAG_ADV_100HALF |
1669 B44_FLAG_ADV_100FULL);
1670 if (cmd->advertising & ADVERTISE_10HALF)
1671 bp->flags |= B44_FLAG_ADV_10HALF;
1672 if (cmd->advertising & ADVERTISE_10FULL)
1673 bp->flags |= B44_FLAG_ADV_10FULL;
1674 if (cmd->advertising & ADVERTISE_100HALF)
1675 bp->flags |= B44_FLAG_ADV_100HALF;
1676 if (cmd->advertising & ADVERTISE_100FULL)
1677 bp->flags |= B44_FLAG_ADV_100FULL;
1678 } else {
1679 bp->flags |= B44_FLAG_FORCE_LINK;
1680 if (cmd->speed == SPEED_100)
1681 bp->flags |= B44_FLAG_100_BASE_T;
1682 if (cmd->duplex == DUPLEX_FULL)
1683 bp->flags |= B44_FLAG_FULL_DUPLEX;
1684 }
1685
1686 b44_setup_phy(bp);
1687
1688 spin_unlock_irq(&bp->lock);
1689
1690 return 0;
1691 }
1692
1693 static void b44_get_ringparam(struct net_device *dev,
1694 struct ethtool_ringparam *ering)
1695 {
1696 struct b44 *bp = netdev_priv(dev);
1697
1698 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1699 ering->rx_pending = bp->rx_pending;
1700
1701 /* XXX ethtool lacks a tx_max_pending, oops... */
1702 }
1703
1704 static int b44_set_ringparam(struct net_device *dev,
1705 struct ethtool_ringparam *ering)
1706 {
1707 struct b44 *bp = netdev_priv(dev);
1708
1709 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1710 (ering->rx_mini_pending != 0) ||
1711 (ering->rx_jumbo_pending != 0) ||
1712 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1713 return -EINVAL;
1714
1715 spin_lock_irq(&bp->lock);
1716
1717 bp->rx_pending = ering->rx_pending;
1718 bp->tx_pending = ering->tx_pending;
1719
1720 b44_halt(bp);
1721 b44_init_rings(bp);
1722 b44_init_hw(bp);
1723 netif_wake_queue(bp->dev);
1724 spin_unlock_irq(&bp->lock);
1725
1726 b44_enable_ints(bp);
1727
1728 return 0;
1729 }
1730
1731 static void b44_get_pauseparam(struct net_device *dev,
1732 struct ethtool_pauseparam *epause)
1733 {
1734 struct b44 *bp = netdev_priv(dev);
1735
1736 epause->autoneg =
1737 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1738 epause->rx_pause =
1739 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1740 epause->tx_pause =
1741 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1742 }
1743
1744 static int b44_set_pauseparam(struct net_device *dev,
1745 struct ethtool_pauseparam *epause)
1746 {
1747 struct b44 *bp = netdev_priv(dev);
1748
1749 spin_lock_irq(&bp->lock);
1750 if (epause->autoneg)
1751 bp->flags |= B44_FLAG_PAUSE_AUTO;
1752 else
1753 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1754 if (epause->rx_pause)
1755 bp->flags |= B44_FLAG_RX_PAUSE;
1756 else
1757 bp->flags &= ~B44_FLAG_RX_PAUSE;
1758 if (epause->tx_pause)
1759 bp->flags |= B44_FLAG_TX_PAUSE;
1760 else
1761 bp->flags &= ~B44_FLAG_TX_PAUSE;
1762 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1763 b44_halt(bp);
1764 b44_init_rings(bp);
1765 b44_init_hw(bp);
1766 } else {
1767 __b44_set_flow_ctrl(bp, bp->flags);
1768 }
1769 spin_unlock_irq(&bp->lock);
1770
1771 b44_enable_ints(bp);
1772
1773 return 0;
1774 }
1775
1776 static struct ethtool_ops b44_ethtool_ops = {
1777 .get_drvinfo = b44_get_drvinfo,
1778 .get_settings = b44_get_settings,
1779 .set_settings = b44_set_settings,
1780 .nway_reset = b44_nway_reset,
1781 .get_link = ethtool_op_get_link,
1782 .get_ringparam = b44_get_ringparam,
1783 .set_ringparam = b44_set_ringparam,
1784 .get_pauseparam = b44_get_pauseparam,
1785 .set_pauseparam = b44_set_pauseparam,
1786 .get_msglevel = b44_get_msglevel,
1787 .set_msglevel = b44_set_msglevel,
1788 .get_perm_addr = ethtool_op_get_perm_addr,
1789 };
1790
1791 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1792 {
1793 struct mii_ioctl_data *data = if_mii(ifr);
1794 struct b44 *bp = netdev_priv(dev);
1795 int err;
1796
1797 spin_lock_irq(&bp->lock);
1798 err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
1799 spin_unlock_irq(&bp->lock);
1800
1801 return err;
1802 }
1803
1804 /* Read 128-bytes of EEPROM. */
1805 static int b44_read_eeprom(struct b44 *bp, u8 *data)
1806 {
1807 long i;
1808 u16 *ptr = (u16 *) data;
1809
1810 for (i = 0; i < 128; i += 2)
1811 ptr[i / 2] = readw(bp->regs + 4096 + i);
1812
1813 return 0;
1814 }
1815
1816 static int __devinit b44_get_invariants(struct b44 *bp)
1817 {
1818 u8 eeprom[128];
1819 int err;
1820
1821 err = b44_read_eeprom(bp, &eeprom[0]);
1822 if (err)
1823 goto out;
1824
1825 bp->dev->dev_addr[0] = eeprom[79];
1826 bp->dev->dev_addr[1] = eeprom[78];
1827 bp->dev->dev_addr[2] = eeprom[81];
1828 bp->dev->dev_addr[3] = eeprom[80];
1829 bp->dev->dev_addr[4] = eeprom[83];
1830 bp->dev->dev_addr[5] = eeprom[82];
1831 memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
1832
1833 bp->phy_addr = eeprom[90] & 0x1f;
1834
1835 /* With this, plus the rx_header prepended to the data by the
1836 * hardware, we'll land the ethernet header on a 2-byte boundary.
1837 */
1838 bp->rx_offset = 30;
1839
1840 bp->imask = IMASK_DEF;
1841
1842 bp->core_unit = ssb_core_unit(bp);
1843 bp->dma_offset = SB_PCI_DMA;
1844
1845 /* XXX - really required?
1846 bp->flags |= B44_FLAG_BUGGY_TXPTR;
1847 */
1848 out:
1849 return err;
1850 }
1851
1852 static int __devinit b44_init_one(struct pci_dev *pdev,
1853 const struct pci_device_id *ent)
1854 {
1855 static int b44_version_printed = 0;
1856 unsigned long b44reg_base, b44reg_len;
1857 struct net_device *dev;
1858 struct b44 *bp;
1859 int err, i;
1860
1861 if (b44_version_printed++ == 0)
1862 printk(KERN_INFO "%s", version);
1863
1864 err = pci_enable_device(pdev);
1865 if (err) {
1866 printk(KERN_ERR PFX "Cannot enable PCI device, "
1867 "aborting.\n");
1868 return err;
1869 }
1870
1871 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1872 printk(KERN_ERR PFX "Cannot find proper PCI device "
1873 "base address, aborting.\n");
1874 err = -ENODEV;
1875 goto err_out_disable_pdev;
1876 }
1877
1878 err = pci_request_regions(pdev, DRV_MODULE_NAME);
1879 if (err) {
1880 printk(KERN_ERR PFX "Cannot obtain PCI resources, "
1881 "aborting.\n");
1882 goto err_out_disable_pdev;
1883 }
1884
1885 pci_set_master(pdev);
1886
1887 err = pci_set_dma_mask(pdev, (u64) B44_DMA_MASK);
1888 if (err) {
1889 printk(KERN_ERR PFX "No usable DMA configuration, "
1890 "aborting.\n");
1891 goto err_out_free_res;
1892 }
1893
1894 err = pci_set_consistent_dma_mask(pdev, (u64) B44_DMA_MASK);
1895 if (err) {
1896 printk(KERN_ERR PFX "No usable DMA configuration, "
1897 "aborting.\n");
1898 goto err_out_free_res;
1899 }
1900
1901 b44reg_base = pci_resource_start(pdev, 0);
1902 b44reg_len = pci_resource_len(pdev, 0);
1903
1904 dev = alloc_etherdev(sizeof(*bp));
1905 if (!dev) {
1906 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1907 err = -ENOMEM;
1908 goto err_out_free_res;
1909 }
1910
1911 SET_MODULE_OWNER(dev);
1912 SET_NETDEV_DEV(dev,&pdev->dev);
1913
1914 /* No interesting netdevice features in this card... */
1915 dev->features |= 0;
1916
1917 bp = netdev_priv(dev);
1918 bp->pdev = pdev;
1919 bp->dev = dev;
1920 if (b44_debug >= 0)
1921 bp->msg_enable = (1 << b44_debug) - 1;
1922 else
1923 bp->msg_enable = B44_DEF_MSG_ENABLE;
1924
1925 spin_lock_init(&bp->lock);
1926
1927 bp->regs = ioremap(b44reg_base, b44reg_len);
1928 if (bp->regs == 0UL) {
1929 printk(KERN_ERR PFX "Cannot map device registers, "
1930 "aborting.\n");
1931 err = -ENOMEM;
1932 goto err_out_free_dev;
1933 }
1934
1935 bp->rx_pending = B44_DEF_RX_RING_PENDING;
1936 bp->tx_pending = B44_DEF_TX_RING_PENDING;
1937
1938 dev->open = b44_open;
1939 dev->stop = b44_close;
1940 dev->hard_start_xmit = b44_start_xmit;
1941 dev->get_stats = b44_get_stats;
1942 dev->set_multicast_list = b44_set_rx_mode;
1943 dev->set_mac_address = b44_set_mac_addr;
1944 dev->do_ioctl = b44_ioctl;
1945 dev->tx_timeout = b44_tx_timeout;
1946 dev->poll = b44_poll;
1947 dev->weight = 64;
1948 dev->watchdog_timeo = B44_TX_TIMEOUT;
1949 #ifdef CONFIG_NET_POLL_CONTROLLER
1950 dev->poll_controller = b44_poll_controller;
1951 #endif
1952 dev->change_mtu = b44_change_mtu;
1953 dev->irq = pdev->irq;
1954 SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
1955
1956 err = b44_get_invariants(bp);
1957 if (err) {
1958 printk(KERN_ERR PFX "Problem fetching invariants of chip, "
1959 "aborting.\n");
1960 goto err_out_iounmap;
1961 }
1962
1963 bp->mii_if.dev = dev;
1964 bp->mii_if.mdio_read = b44_mii_read;
1965 bp->mii_if.mdio_write = b44_mii_write;
1966 bp->mii_if.phy_id = bp->phy_addr;
1967 bp->mii_if.phy_id_mask = 0x1f;
1968 bp->mii_if.reg_num_mask = 0x1f;
1969
1970 /* By default, advertise all speed/duplex settings. */
1971 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
1972 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
1973
1974 /* By default, auto-negotiate PAUSE. */
1975 bp->flags |= B44_FLAG_PAUSE_AUTO;
1976
1977 err = register_netdev(dev);
1978 if (err) {
1979 printk(KERN_ERR PFX "Cannot register net device, "
1980 "aborting.\n");
1981 goto err_out_iounmap;
1982 }
1983
1984 pci_set_drvdata(pdev, dev);
1985
1986 pci_save_state(bp->pdev);
1987
1988 printk(KERN_INFO "%s: Broadcom 4400 10/100BaseT Ethernet ", dev->name);
1989 for (i = 0; i < 6; i++)
1990 printk("%2.2x%c", dev->dev_addr[i],
1991 i == 5 ? '\n' : ':');
1992
1993 return 0;
1994
1995 err_out_iounmap:
1996 iounmap(bp->regs);
1997
1998 err_out_free_dev:
1999 free_netdev(dev);
2000
2001 err_out_free_res:
2002 pci_release_regions(pdev);
2003
2004 err_out_disable_pdev:
2005 pci_disable_device(pdev);
2006 pci_set_drvdata(pdev, NULL);
2007 return err;
2008 }
2009
2010 static void __devexit b44_remove_one(struct pci_dev *pdev)
2011 {
2012 struct net_device *dev = pci_get_drvdata(pdev);
2013
2014 if (dev) {
2015 struct b44 *bp = netdev_priv(dev);
2016
2017 unregister_netdev(dev);
2018 iounmap(bp->regs);
2019 free_netdev(dev);
2020 pci_release_regions(pdev);
2021 pci_disable_device(pdev);
2022 pci_set_drvdata(pdev, NULL);
2023 }
2024 }
2025
2026 static int b44_suspend(struct pci_dev *pdev, pm_message_t state)
2027 {
2028 struct net_device *dev = pci_get_drvdata(pdev);
2029 struct b44 *bp = netdev_priv(dev);
2030
2031 if (!netif_running(dev))
2032 return 0;
2033
2034 del_timer_sync(&bp->timer);
2035
2036 spin_lock_irq(&bp->lock);
2037
2038 b44_halt(bp);
2039 netif_carrier_off(bp->dev);
2040 netif_device_detach(bp->dev);
2041 b44_free_rings(bp);
2042
2043 spin_unlock_irq(&bp->lock);
2044 pci_disable_device(pdev);
2045 return 0;
2046 }
2047
2048 static int b44_resume(struct pci_dev *pdev)
2049 {
2050 struct net_device *dev = pci_get_drvdata(pdev);
2051 struct b44 *bp = netdev_priv(dev);
2052
2053 pci_restore_state(pdev);
2054 pci_enable_device(pdev);
2055 pci_set_master(pdev);
2056
2057 if (!netif_running(dev))
2058 return 0;
2059
2060 spin_lock_irq(&bp->lock);
2061
2062 b44_init_rings(bp);
2063 b44_init_hw(bp);
2064 netif_device_attach(bp->dev);
2065 spin_unlock_irq(&bp->lock);
2066
2067 bp->timer.expires = jiffies + HZ;
2068 add_timer(&bp->timer);
2069
2070 b44_enable_ints(bp);
2071 return 0;
2072 }
2073
2074 static struct pci_driver b44_driver = {
2075 .name = DRV_MODULE_NAME,
2076 .id_table = b44_pci_tbl,
2077 .probe = b44_init_one,
2078 .remove = __devexit_p(b44_remove_one),
2079 .suspend = b44_suspend,
2080 .resume = b44_resume,
2081 };
2082
2083 static int __init b44_init(void)
2084 {
2085 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2086
2087 /* Setup paramaters for syncing RX/TX DMA descriptors */
2088 dma_desc_align_mask = ~(dma_desc_align_size - 1);
2089 dma_desc_sync_size = max(dma_desc_align_size, sizeof(struct dma_desc));
2090
2091 return pci_module_init(&b44_driver);
2092 }
2093
2094 static void __exit b44_cleanup(void)
2095 {
2096 pci_unregister_driver(&b44_driver);
2097 }
2098
2099 module_init(b44_init);
2100 module_exit(b44_cleanup);
2101
Linux 2.6 libata-dev (mirror)