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Merge branch 'mini2440-dev-unlikely' into mini2440-dev
[linux-2.6/mini2440.git] / drivers / net / sungem.c
blob61640b99b7055d07836c43a08bc311f40b548dc8
1 /* $Id: sungem.c,v 1.44.2.22 2002/03/13 01:18:12 davem Exp $
2 * sungem.c: Sun GEM ethernet driver.
3 *
4 * Copyright (C) 2000, 2001, 2002, 2003 David S. Miller (davem@redhat.com)
5 *
6 * Support for Apple GMAC and assorted PHYs, WOL, Power Management
7 * (C) 2001,2002,2003 Benjamin Herrenscmidt (benh@kernel.crashing.org)
8 * (C) 2004,2005 Benjamin Herrenscmidt, IBM Corp.
9 *
10 * NAPI and NETPOLL support
11 * (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com)
12 *
13 * TODO:
14 * - Now that the driver was significantly simplified, I need to rework
15 * the locking. I'm sure we don't need _2_ spinlocks, and we probably
16 * can avoid taking most of them for so long period of time (and schedule
17 * instead). The main issues at this point are caused by the netdev layer
18 * though:
19 *
20 * gem_change_mtu() and gem_set_multicast() are called with a read_lock()
21 * help by net/core/dev.c, thus they can't schedule. That means they can't
22 * call napi_disable() neither, thus force gem_poll() to keep a spinlock
23 * where it could have been dropped. change_mtu especially would love also to
24 * be able to msleep instead of horrid locked delays when resetting the HW,
25 * but that read_lock() makes it impossible, unless I defer it's action to
26 * the reset task, which means it'll be asynchronous (won't take effect until
27 * the system schedules a bit).
28 *
29 * Also, it would probably be possible to also remove most of the long-life
30 * locking in open/resume code path (gem_reinit_chip) by beeing more careful
31 * about when we can start taking interrupts or get xmit() called...
32 */
33
34 #include <linux/module.h>
35 #include <linux/kernel.h>
36 #include <linux/types.h>
37 #include <linux/fcntl.h>
38 #include <linux/interrupt.h>
39 #include <linux/ioport.h>
40 #include <linux/in.h>
41 #include <linux/sched.h>
42 #include <linux/slab.h>
43 #include <linux/string.h>
44 #include <linux/delay.h>
45 #include <linux/init.h>
46 #include <linux/errno.h>
47 #include <linux/pci.h>
48 #include <linux/dma-mapping.h>
49 #include <linux/netdevice.h>
50 #include <linux/etherdevice.h>
51 #include <linux/skbuff.h>
52 #include <linux/mii.h>
53 #include <linux/ethtool.h>
54 #include <linux/crc32.h>
55 #include <linux/random.h>
56 #include <linux/workqueue.h>
57 #include <linux/if_vlan.h>
58 #include <linux/bitops.h>
59 #include <linux/mutex.h>
60 #include <linux/mm.h>
61
62 #include <asm/system.h>
63 #include <asm/io.h>
64 #include <asm/byteorder.h>
65 #include <asm/uaccess.h>
66 #include <asm/irq.h>
67
68 #ifdef CONFIG_SPARC
69 #include <asm/idprom.h>
70 #include <asm/prom.h>
71 #endif
72
73 #ifdef CONFIG_PPC_PMAC
74 #include <asm/pci-bridge.h>
75 #include <asm/prom.h>
76 #include <asm/machdep.h>
77 #include <asm/pmac_feature.h>
78 #endif
79
80 #include "sungem_phy.h"
81 #include "sungem.h"
82
83 /* Stripping FCS is causing problems, disabled for now */
84 #undef STRIP_FCS
85
86 #define DEFAULT_MSG (NETIF_MSG_DRV | \
87 NETIF_MSG_PROBE | \
88 NETIF_MSG_LINK)
89
90 #define ADVERTISE_MASK (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \
91 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \
92 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full | \
93 SUPPORTED_Pause | SUPPORTED_Autoneg)
94
95 #define DRV_NAME "sungem"
96 #define DRV_VERSION "0.98"
97 #define DRV_RELDATE "8/24/03"
98 #define DRV_AUTHOR "David S. Miller (davem@redhat.com)"
99
100 static char version[] __devinitdata =
101 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
102
103 MODULE_AUTHOR(DRV_AUTHOR);
104 MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver");
105 MODULE_LICENSE("GPL");
106
107 #define GEM_MODULE_NAME "gem"
108 #define PFX GEM_MODULE_NAME ": "
109
110 static struct pci_device_id gem_pci_tbl[] = {
111 { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_GEM,
112 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
113
114 /* These models only differ from the original GEM in
115 * that their tx/rx fifos are of a different size and
116 * they only support 10/100 speeds. -DaveM
117 *
118 * Apple's GMAC does support gigabit on machines with
119 * the BCM54xx PHYs. -BenH
120 */
121 { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_RIO_GEM,
122 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
123 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC,
124 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
125 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMACP,
126 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
127 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC2,
128 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
129 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_GMAC,
130 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
131 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_SUNGEM,
132 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
133 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID2_GMAC,
134 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
135 {0, }
136 };
137
138 MODULE_DEVICE_TABLE(pci, gem_pci_tbl);
139
140 static u16 __phy_read(struct gem *gp, int phy_addr, int reg)
141 {
142 u32 cmd;
143 int limit = 10000;
144
145 cmd = (1 << 30);
146 cmd |= (2 << 28);
147 cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD;
148 cmd |= (reg << 18) & MIF_FRAME_REGAD;
149 cmd |= (MIF_FRAME_TAMSB);
150 writel(cmd, gp->regs + MIF_FRAME);
151
152 while (--limit) {
153 cmd = readl(gp->regs + MIF_FRAME);
154 if (cmd & MIF_FRAME_TALSB)
155 break;
156
157 udelay(10);
158 }
159
160 if (!limit)
161 cmd = 0xffff;
162
163 return cmd & MIF_FRAME_DATA;
164 }
165
166 static inline int _phy_read(struct net_device *dev, int mii_id, int reg)
167 {
168 struct gem *gp = netdev_priv(dev);
169 return __phy_read(gp, mii_id, reg);
170 }
171
172 static inline u16 phy_read(struct gem *gp, int reg)
173 {
174 return __phy_read(gp, gp->mii_phy_addr, reg);
175 }
176
177 static void __phy_write(struct gem *gp, int phy_addr, int reg, u16 val)
178 {
179 u32 cmd;
180 int limit = 10000;
181
182 cmd = (1 << 30);
183 cmd |= (1 << 28);
184 cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD;
185 cmd |= (reg << 18) & MIF_FRAME_REGAD;
186 cmd |= (MIF_FRAME_TAMSB);
187 cmd |= (val & MIF_FRAME_DATA);
188 writel(cmd, gp->regs + MIF_FRAME);
189
190 while (limit--) {
191 cmd = readl(gp->regs + MIF_FRAME);
192 if (cmd & MIF_FRAME_TALSB)
193 break;
194
195 udelay(10);
196 }
197 }
198
199 static inline void _phy_write(struct net_device *dev, int mii_id, int reg, int val)
200 {
201 struct gem *gp = netdev_priv(dev);
202 __phy_write(gp, mii_id, reg, val & 0xffff);
203 }
204
205 static inline void phy_write(struct gem *gp, int reg, u16 val)
206 {
207 __phy_write(gp, gp->mii_phy_addr, reg, val);
208 }
209
210 static inline void gem_enable_ints(struct gem *gp)
211 {
212 /* Enable all interrupts but TXDONE */
213 writel(GREG_STAT_TXDONE, gp->regs + GREG_IMASK);
214 }
215
216 static inline void gem_disable_ints(struct gem *gp)
217 {
218 /* Disable all interrupts, including TXDONE */
219 writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK);
220 }
221
222 static void gem_get_cell(struct gem *gp)
223 {
224 BUG_ON(gp->cell_enabled < 0);
225 gp->cell_enabled++;
226 #ifdef CONFIG_PPC_PMAC
227 if (gp->cell_enabled == 1) {
228 mb();
229 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1);
230 udelay(10);
231 }
232 #endif /* CONFIG_PPC_PMAC */
233 }
234
235 /* Turn off the chip's clock */
236 static void gem_put_cell(struct gem *gp)
237 {
238 BUG_ON(gp->cell_enabled <= 0);
239 gp->cell_enabled--;
240 #ifdef CONFIG_PPC_PMAC
241 if (gp->cell_enabled == 0) {
242 mb();
243 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0);
244 udelay(10);
245 }
246 #endif /* CONFIG_PPC_PMAC */
247 }
248
249 static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits)
250 {
251 if (netif_msg_intr(gp))
252 printk(KERN_DEBUG "%s: mif interrupt\n", gp->dev->name);
253 }
254
255 static int gem_pcs_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
256 {
257 u32 pcs_istat = readl(gp->regs + PCS_ISTAT);
258 u32 pcs_miistat;
259
260 if (netif_msg_intr(gp))
261 printk(KERN_DEBUG "%s: pcs interrupt, pcs_istat: 0x%x\n",
262 gp->dev->name, pcs_istat);
263
264 if (!(pcs_istat & PCS_ISTAT_LSC)) {
265 printk(KERN_ERR "%s: PCS irq but no link status change???\n",
266 dev->name);
267 return 0;
268 }
269
270 /* The link status bit latches on zero, so you must
271 * read it twice in such a case to see a transition
272 * to the link being up.
273 */
274 pcs_miistat = readl(gp->regs + PCS_MIISTAT);
275 if (!(pcs_miistat & PCS_MIISTAT_LS))
276 pcs_miistat |=
277 (readl(gp->regs + PCS_MIISTAT) &
278 PCS_MIISTAT_LS);
279
280 if (pcs_miistat & PCS_MIISTAT_ANC) {
281 /* The remote-fault indication is only valid
282 * when autoneg has completed.
283 */
284 if (pcs_miistat & PCS_MIISTAT_RF)
285 printk(KERN_INFO "%s: PCS AutoNEG complete, "
286 "RemoteFault\n", dev->name);
287 else
288 printk(KERN_INFO "%s: PCS AutoNEG complete.\n",
289 dev->name);
290 }
291
292 if (pcs_miistat & PCS_MIISTAT_LS) {
293 printk(KERN_INFO "%s: PCS link is now up.\n",
294 dev->name);
295 netif_carrier_on(gp->dev);
296 } else {
297 printk(KERN_INFO "%s: PCS link is now down.\n",
298 dev->name);
299 netif_carrier_off(gp->dev);
300 /* If this happens and the link timer is not running,
301 * reset so we re-negotiate.
302 */
303 if (!timer_pending(&gp->link_timer))
304 return 1;
305 }
306
307 return 0;
308 }
309
310 static int gem_txmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
311 {
312 u32 txmac_stat = readl(gp->regs + MAC_TXSTAT);
313
314 if (netif_msg_intr(gp))
315 printk(KERN_DEBUG "%s: txmac interrupt, txmac_stat: 0x%x\n",
316 gp->dev->name, txmac_stat);
317
318 /* Defer timer expiration is quite normal,
319 * don't even log the event.
320 */
321 if ((txmac_stat & MAC_TXSTAT_DTE) &&
322 !(txmac_stat & ~MAC_TXSTAT_DTE))
323 return 0;
324
325 if (txmac_stat & MAC_TXSTAT_URUN) {
326 printk(KERN_ERR "%s: TX MAC xmit underrun.\n",
327 dev->name);
328 gp->net_stats.tx_fifo_errors++;
329 }
330
331 if (txmac_stat & MAC_TXSTAT_MPE) {
332 printk(KERN_ERR "%s: TX MAC max packet size error.\n",
333 dev->name);
334 gp->net_stats.tx_errors++;
335 }
336
337 /* The rest are all cases of one of the 16-bit TX
338 * counters expiring.
339 */
340 if (txmac_stat & MAC_TXSTAT_NCE)
341 gp->net_stats.collisions += 0x10000;
342
343 if (txmac_stat & MAC_TXSTAT_ECE) {
344 gp->net_stats.tx_aborted_errors += 0x10000;
345 gp->net_stats.collisions += 0x10000;
346 }
347
348 if (txmac_stat & MAC_TXSTAT_LCE) {
349 gp->net_stats.tx_aborted_errors += 0x10000;
350 gp->net_stats.collisions += 0x10000;
351 }
352
353 /* We do not keep track of MAC_TXSTAT_FCE and
354 * MAC_TXSTAT_PCE events.
355 */
356 return 0;
357 }
358
359 /* When we get a RX fifo overflow, the RX unit in GEM is probably hung
360 * so we do the following.
361 *
362 * If any part of the reset goes wrong, we return 1 and that causes the
363 * whole chip to be reset.
364 */
365 static int gem_rxmac_reset(struct gem *gp)
366 {
367 struct net_device *dev = gp->dev;
368 int limit, i;
369 u64 desc_dma;
370 u32 val;
371
372 /* First, reset & disable MAC RX. */
373 writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST);
374 for (limit = 0; limit < 5000; limit++) {
375 if (!(readl(gp->regs + MAC_RXRST) & MAC_RXRST_CMD))
376 break;
377 udelay(10);
378 }
379 if (limit == 5000) {
380 printk(KERN_ERR "%s: RX MAC will not reset, resetting whole "
381 "chip.\n", dev->name);
382 return 1;
383 }
384
385 writel(gp->mac_rx_cfg & ~MAC_RXCFG_ENAB,
386 gp->regs + MAC_RXCFG);
387 for (limit = 0; limit < 5000; limit++) {
388 if (!(readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB))
389 break;
390 udelay(10);
391 }
392 if (limit == 5000) {
393 printk(KERN_ERR "%s: RX MAC will not disable, resetting whole "
394 "chip.\n", dev->name);
395 return 1;
396 }
397
398 /* Second, disable RX DMA. */
399 writel(0, gp->regs + RXDMA_CFG);
400 for (limit = 0; limit < 5000; limit++) {
401 if (!(readl(gp->regs + RXDMA_CFG) & RXDMA_CFG_ENABLE))
402 break;
403 udelay(10);
404 }
405 if (limit == 5000) {
406 printk(KERN_ERR "%s: RX DMA will not disable, resetting whole "
407 "chip.\n", dev->name);
408 return 1;
409 }
410
411 udelay(5000);
412
413 /* Execute RX reset command. */
414 writel(gp->swrst_base | GREG_SWRST_RXRST,
415 gp->regs + GREG_SWRST);
416 for (limit = 0; limit < 5000; limit++) {
417 if (!(readl(gp->regs + GREG_SWRST) & GREG_SWRST_RXRST))
418 break;
419 udelay(10);
420 }
421 if (limit == 5000) {
422 printk(KERN_ERR "%s: RX reset command will not execute, resetting "
423 "whole chip.\n", dev->name);
424 return 1;
425 }
426
427 /* Refresh the RX ring. */
428 for (i = 0; i < RX_RING_SIZE; i++) {
429 struct gem_rxd *rxd = &gp->init_block->rxd[i];
430
431 if (gp->rx_skbs[i] == NULL) {
432 printk(KERN_ERR "%s: Parts of RX ring empty, resetting "
433 "whole chip.\n", dev->name);
434 return 1;
435 }
436
437 rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp));
438 }
439 gp->rx_new = gp->rx_old = 0;
440
441 /* Now we must reprogram the rest of RX unit. */
442 desc_dma = (u64) gp->gblock_dvma;
443 desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd));
444 writel(desc_dma >> 32, gp->regs + RXDMA_DBHI);
445 writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW);
446 writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK);
447 val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) |
448 ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128);
449 writel(val, gp->regs + RXDMA_CFG);
450 if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN)
451 writel(((5 & RXDMA_BLANK_IPKTS) |
452 ((8 << 12) & RXDMA_BLANK_ITIME)),
453 gp->regs + RXDMA_BLANK);
454 else
455 writel(((5 & RXDMA_BLANK_IPKTS) |
456 ((4 << 12) & RXDMA_BLANK_ITIME)),
457 gp->regs + RXDMA_BLANK);
458 val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF);
459 val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON);
460 writel(val, gp->regs + RXDMA_PTHRESH);
461 val = readl(gp->regs + RXDMA_CFG);
462 writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
463 writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK);
464 val = readl(gp->regs + MAC_RXCFG);
465 writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
466
467 return 0;
468 }
469
470 static int gem_rxmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
471 {
472 u32 rxmac_stat = readl(gp->regs + MAC_RXSTAT);
473 int ret = 0;
474
475 if (netif_msg_intr(gp))
476 printk(KERN_DEBUG "%s: rxmac interrupt, rxmac_stat: 0x%x\n",
477 gp->dev->name, rxmac_stat);
478
479 if (rxmac_stat & MAC_RXSTAT_OFLW) {
480 u32 smac = readl(gp->regs + MAC_SMACHINE);
481
482 printk(KERN_ERR "%s: RX MAC fifo overflow smac[%08x].\n",
483 dev->name, smac);
484 gp->net_stats.rx_over_errors++;
485 gp->net_stats.rx_fifo_errors++;
486
487 ret = gem_rxmac_reset(gp);
488 }
489
490 if (rxmac_stat & MAC_RXSTAT_ACE)
491 gp->net_stats.rx_frame_errors += 0x10000;
492
493 if (rxmac_stat & MAC_RXSTAT_CCE)
494 gp->net_stats.rx_crc_errors += 0x10000;
495
496 if (rxmac_stat & MAC_RXSTAT_LCE)
497 gp->net_stats.rx_length_errors += 0x10000;
498
499 /* We do not track MAC_RXSTAT_FCE and MAC_RXSTAT_VCE
500 * events.
501 */
502 return ret;
503 }
504
505 static int gem_mac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
506 {
507 u32 mac_cstat = readl(gp->regs + MAC_CSTAT);
508
509 if (netif_msg_intr(gp))
510 printk(KERN_DEBUG "%s: mac interrupt, mac_cstat: 0x%x\n",
511 gp->dev->name, mac_cstat);
512
513 /* This interrupt is just for pause frame and pause
514 * tracking. It is useful for diagnostics and debug
515 * but probably by default we will mask these events.
516 */
517 if (mac_cstat & MAC_CSTAT_PS)
518 gp->pause_entered++;
519
520 if (mac_cstat & MAC_CSTAT_PRCV)
521 gp->pause_last_time_recvd = (mac_cstat >> 16);
522
523 return 0;
524 }
525
526 static int gem_mif_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
527 {
528 u32 mif_status = readl(gp->regs + MIF_STATUS);
529 u32 reg_val, changed_bits;
530
531 reg_val = (mif_status & MIF_STATUS_DATA) >> 16;
532 changed_bits = (mif_status & MIF_STATUS_STAT);
533
534 gem_handle_mif_event(gp, reg_val, changed_bits);
535
536 return 0;
537 }
538
539 static int gem_pci_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status)
540 {
541 u32 pci_estat = readl(gp->regs + GREG_PCIESTAT);
542
543 if (gp->pdev->vendor == PCI_VENDOR_ID_SUN &&
544 gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) {
545 printk(KERN_ERR "%s: PCI error [%04x] ",
546 dev->name, pci_estat);
547
548 if (pci_estat & GREG_PCIESTAT_BADACK)
549 printk("<No ACK64# during ABS64 cycle> ");
550 if (pci_estat & GREG_PCIESTAT_DTRTO)
551 printk("<Delayed transaction timeout> ");
552 if (pci_estat & GREG_PCIESTAT_OTHER)
553 printk("<other>");
554 printk("\n");
555 } else {
556 pci_estat |= GREG_PCIESTAT_OTHER;
557 printk(KERN_ERR "%s: PCI error\n", dev->name);
558 }
559
560 if (pci_estat & GREG_PCIESTAT_OTHER) {
561 u16 pci_cfg_stat;
562
563 /* Interrogate PCI config space for the
564 * true cause.
565 */
566 pci_read_config_word(gp->pdev, PCI_STATUS,
567 &pci_cfg_stat);
568 printk(KERN_ERR "%s: Read PCI cfg space status [%04x]\n",
569 dev->name, pci_cfg_stat);
570 if (pci_cfg_stat & PCI_STATUS_PARITY)
571 printk(KERN_ERR "%s: PCI parity error detected.\n",
572 dev->name);
573 if (pci_cfg_stat & PCI_STATUS_SIG_TARGET_ABORT)
574 printk(KERN_ERR "%s: PCI target abort.\n",
575 dev->name);
576 if (pci_cfg_stat & PCI_STATUS_REC_TARGET_ABORT)
577 printk(KERN_ERR "%s: PCI master acks target abort.\n",
578 dev->name);
579 if (pci_cfg_stat & PCI_STATUS_REC_MASTER_ABORT)
580 printk(KERN_ERR "%s: PCI master abort.\n",
581 dev->name);
582 if (pci_cfg_stat & PCI_STATUS_SIG_SYSTEM_ERROR)
583 printk(KERN_ERR "%s: PCI system error SERR#.\n",
584 dev->name);
585 if (pci_cfg_stat & PCI_STATUS_DETECTED_PARITY)
586 printk(KERN_ERR "%s: PCI parity error.\n",
587 dev->name);
588
589 /* Write the error bits back to clear them. */
590 pci_cfg_stat &= (PCI_STATUS_PARITY |
591 PCI_STATUS_SIG_TARGET_ABORT |
592 PCI_STATUS_REC_TARGET_ABORT |
593 PCI_STATUS_REC_MASTER_ABORT |
594 PCI_STATUS_SIG_SYSTEM_ERROR |
595 PCI_STATUS_DETECTED_PARITY);
596 pci_write_config_word(gp->pdev,
597 PCI_STATUS, pci_cfg_stat);
598 }
599
600 /* For all PCI errors, we should reset the chip. */
601 return 1;
602 }
603
604 /* All non-normal interrupt conditions get serviced here.
605 * Returns non-zero if we should just exit the interrupt
606 * handler right now (ie. if we reset the card which invalidates
607 * all of the other original irq status bits).
608 */
609 static int gem_abnormal_irq(struct net_device *dev, struct gem *gp, u32 gem_status)
610 {
611 if (gem_status & GREG_STAT_RXNOBUF) {
612 /* Frame arrived, no free RX buffers available. */
613 if (netif_msg_rx_err(gp))
614 printk(KERN_DEBUG "%s: no buffer for rx frame\n",
615 gp->dev->name);
616 gp->net_stats.rx_dropped++;
617 }
618
619 if (gem_status & GREG_STAT_RXTAGERR) {
620 /* corrupt RX tag framing */
621 if (netif_msg_rx_err(gp))
622 printk(KERN_DEBUG "%s: corrupt rx tag framing\n",
623 gp->dev->name);
624 gp->net_stats.rx_errors++;
625
626 goto do_reset;
627 }
628
629 if (gem_status & GREG_STAT_PCS) {
630 if (gem_pcs_interrupt(dev, gp, gem_status))
631 goto do_reset;
632 }
633
634 if (gem_status & GREG_STAT_TXMAC) {
635 if (gem_txmac_interrupt(dev, gp, gem_status))
636 goto do_reset;
637 }
638
639 if (gem_status & GREG_STAT_RXMAC) {
640 if (gem_rxmac_interrupt(dev, gp, gem_status))
641 goto do_reset;
642 }
643
644 if (gem_status & GREG_STAT_MAC) {
645 if (gem_mac_interrupt(dev, gp, gem_status))
646 goto do_reset;
647 }
648
649 if (gem_status & GREG_STAT_MIF) {
650 if (gem_mif_interrupt(dev, gp, gem_status))
651 goto do_reset;
652 }
653
654 if (gem_status & GREG_STAT_PCIERR) {
655 if (gem_pci_interrupt(dev, gp, gem_status))
656 goto do_reset;
657 }
658
659 return 0;
660
661 do_reset:
662 gp->reset_task_pending = 1;
663 schedule_work(&gp->reset_task);
664
665 return 1;
666 }
667
668 static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status)
669 {
670 int entry, limit;
671
672 if (netif_msg_intr(gp))
673 printk(KERN_DEBUG "%s: tx interrupt, gem_status: 0x%x\n",
674 gp->dev->name, gem_status);
675
676 entry = gp->tx_old;
677 limit = ((gem_status & GREG_STAT_TXNR) >> GREG_STAT_TXNR_SHIFT);
678 while (entry != limit) {
679 struct sk_buff *skb;
680 struct gem_txd *txd;
681 dma_addr_t dma_addr;
682 u32 dma_len;
683 int frag;
684
685 if (netif_msg_tx_done(gp))
686 printk(KERN_DEBUG "%s: tx done, slot %d\n",
687 gp->dev->name, entry);
688 skb = gp->tx_skbs[entry];
689 if (skb_shinfo(skb)->nr_frags) {
690 int last = entry + skb_shinfo(skb)->nr_frags;
691 int walk = entry;
692 int incomplete = 0;
693
694 last &= (TX_RING_SIZE - 1);
695 for (;;) {
696 walk = NEXT_TX(walk);
697 if (walk == limit)
698 incomplete = 1;
699 if (walk == last)
700 break;
701 }
702 if (incomplete)
703 break;
704 }
705 gp->tx_skbs[entry] = NULL;
706 gp->net_stats.tx_bytes += skb->len;
707
708 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
709 txd = &gp->init_block->txd[entry];
710
711 dma_addr = le64_to_cpu(txd->buffer);
712 dma_len = le64_to_cpu(txd->control_word) & TXDCTRL_BUFSZ;
713
714 pci_unmap_page(gp->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE);
715 entry = NEXT_TX(entry);
716 }
717
718 gp->net_stats.tx_packets++;
719 dev_kfree_skb_irq(skb);
720 }
721 gp->tx_old = entry;
722
723 if (netif_queue_stopped(dev) &&
724 TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))
725 netif_wake_queue(dev);
726 }
727
728 static __inline__ void gem_post_rxds(struct gem *gp, int limit)
729 {
730 int cluster_start, curr, count, kick;
731
732 cluster_start = curr = (gp->rx_new & ~(4 - 1));
733 count = 0;
734 kick = -1;
735 wmb();
736 while (curr != limit) {
737 curr = NEXT_RX(curr);
738 if (++count == 4) {
739 struct gem_rxd *rxd =
740 &gp->init_block->rxd[cluster_start];
741 for (;;) {
742 rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp));
743 rxd++;
744 cluster_start = NEXT_RX(cluster_start);
745 if (cluster_start == curr)
746 break;
747 }
748 kick = curr;
749 count = 0;
750 }
751 }
752 if (kick >= 0) {
753 mb();
754 writel(kick, gp->regs + RXDMA_KICK);
755 }
756 }
757
758 static int gem_rx(struct gem *gp, int work_to_do)
759 {
760 int entry, drops, work_done = 0;
761 u32 done;
762 __sum16 csum;
763
764 if (netif_msg_rx_status(gp))
765 printk(KERN_DEBUG "%s: rx interrupt, done: %d, rx_new: %d\n",
766 gp->dev->name, readl(gp->regs + RXDMA_DONE), gp->rx_new);
767
768 entry = gp->rx_new;
769 drops = 0;
770 done = readl(gp->regs + RXDMA_DONE);
771 for (;;) {
772 struct gem_rxd *rxd = &gp->init_block->rxd[entry];
773 struct sk_buff *skb;
774 u64 status = le64_to_cpu(rxd->status_word);
775 dma_addr_t dma_addr;
776 int len;
777
778 if ((status & RXDCTRL_OWN) != 0)
779 break;
780
781 if (work_done >= RX_RING_SIZE || work_done >= work_to_do)
782 break;
783
784 /* When writing back RX descriptor, GEM writes status
785 * then buffer address, possibly in seperate transactions.
786 * If we don't wait for the chip to write both, we could
787 * post a new buffer to this descriptor then have GEM spam
788 * on the buffer address. We sync on the RX completion
789 * register to prevent this from happening.
790 */
791 if (entry == done) {
792 done = readl(gp->regs + RXDMA_DONE);
793 if (entry == done)
794 break;
795 }
796
797 /* We can now account for the work we're about to do */
798 work_done++;
799
800 skb = gp->rx_skbs[entry];
801
802 len = (status & RXDCTRL_BUFSZ) >> 16;
803 if ((len < ETH_ZLEN) || (status & RXDCTRL_BAD)) {
804 gp->net_stats.rx_errors++;
805 if (len < ETH_ZLEN)
806 gp->net_stats.rx_length_errors++;
807 if (len & RXDCTRL_BAD)
808 gp->net_stats.rx_crc_errors++;
809
810 /* We'll just return it to GEM. */
811 drop_it:
812 gp->net_stats.rx_dropped++;
813 goto next;
814 }
815
816 dma_addr = le64_to_cpu(rxd->buffer);
817 if (len > RX_COPY_THRESHOLD) {
818 struct sk_buff *new_skb;
819
820 new_skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC);
821 if (new_skb == NULL) {
822 drops++;
823 goto drop_it;
824 }
825 pci_unmap_page(gp->pdev, dma_addr,
826 RX_BUF_ALLOC_SIZE(gp),
827 PCI_DMA_FROMDEVICE);
828 gp->rx_skbs[entry] = new_skb;
829 new_skb->dev = gp->dev;
830 skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET));
831 rxd->buffer = cpu_to_le64(pci_map_page(gp->pdev,
832 virt_to_page(new_skb->data),
833 offset_in_page(new_skb->data),
834 RX_BUF_ALLOC_SIZE(gp),
835 PCI_DMA_FROMDEVICE));
836 skb_reserve(new_skb, RX_OFFSET);
837
838 /* Trim the original skb for the netif. */
839 skb_trim(skb, len);
840 } else {
841 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
842
843 if (copy_skb == NULL) {
844 drops++;
845 goto drop_it;
846 }
847
848 skb_reserve(copy_skb, 2);
849 skb_put(copy_skb, len);
850 pci_dma_sync_single_for_cpu(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE);
851 skb_copy_from_linear_data(skb, copy_skb->data, len);
852 pci_dma_sync_single_for_device(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE);
853
854 /* We'll reuse the original ring buffer. */
855 skb = copy_skb;
856 }
857
858 csum = (__force __sum16)htons((status & RXDCTRL_TCPCSUM) ^ 0xffff);
859 skb->csum = csum_unfold(csum);
860 skb->ip_summed = CHECKSUM_COMPLETE;
861 skb->protocol = eth_type_trans(skb, gp->dev);
862
863 netif_receive_skb(skb);
864
865 gp->net_stats.rx_packets++;
866 gp->net_stats.rx_bytes += len;
867
868 next:
869 entry = NEXT_RX(entry);
870 }
871
872 gem_post_rxds(gp, entry);
873
874 gp->rx_new = entry;
875
876 if (drops)
877 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
878 gp->dev->name);
879
880 return work_done;
881 }
882
883 static int gem_poll(struct napi_struct *napi, int budget)
884 {
885 struct gem *gp = container_of(napi, struct gem, napi);
886 struct net_device *dev = gp->dev;
887 unsigned long flags;
888 int work_done;
889
890 /*
891 * NAPI locking nightmare: See comment at head of driver
892 */
893 spin_lock_irqsave(&gp->lock, flags);
894
895 work_done = 0;
896 do {
897 /* Handle anomalies */
898 if (gp->status & GREG_STAT_ABNORMAL) {
899 if (gem_abnormal_irq(dev, gp, gp->status))
900 break;
901 }
902
903 /* Run TX completion thread */
904 spin_lock(&gp->tx_lock);
905 gem_tx(dev, gp, gp->status);
906 spin_unlock(&gp->tx_lock);
907
908 spin_unlock_irqrestore(&gp->lock, flags);
909
910 /* Run RX thread. We don't use any locking here,
911 * code willing to do bad things - like cleaning the
912 * rx ring - must call napi_disable(), which
913 * schedule_timeout()'s if polling is already disabled.
914 */
915 work_done += gem_rx(gp, budget - work_done);
916
917 if (work_done >= budget)
918 return work_done;
919
920 spin_lock_irqsave(&gp->lock, flags);
921
922 gp->status = readl(gp->regs + GREG_STAT);
923 } while (gp->status & GREG_STAT_NAPI);
924
925 __napi_complete(napi);
926 gem_enable_ints(gp);
927
928 spin_unlock_irqrestore(&gp->lock, flags);
929
930 return work_done;
931 }
932
933 static irqreturn_t gem_interrupt(int irq, void *dev_id)
934 {
935 struct net_device *dev = dev_id;
936 struct gem *gp = netdev_priv(dev);
937 unsigned long flags;
938
939 /* Swallow interrupts when shutting the chip down, though
940 * that shouldn't happen, we should have done free_irq() at
941 * this point...
942 */
943 if (!gp->running)
944 return IRQ_HANDLED;
945
946 spin_lock_irqsave(&gp->lock, flags);
947
948 if (napi_schedule_prep(&gp->napi)) {
949 u32 gem_status = readl(gp->regs + GREG_STAT);
950
951 if (gem_status == 0) {
952 napi_enable(&gp->napi);
953 spin_unlock_irqrestore(&gp->lock, flags);
954 return IRQ_NONE;
955 }
956 gp->status = gem_status;
957 gem_disable_ints(gp);
958 __napi_schedule(&gp->napi);
959 }
960
961 spin_unlock_irqrestore(&gp->lock, flags);
962
963 /* If polling was disabled at the time we received that
964 * interrupt, we may return IRQ_HANDLED here while we
965 * should return IRQ_NONE. No big deal...
966 */
967 return IRQ_HANDLED;
968 }
969
970 #ifdef CONFIG_NET_POLL_CONTROLLER
971 static void gem_poll_controller(struct net_device *dev)
972 {
973 /* gem_interrupt is safe to reentrance so no need
974 * to disable_irq here.
975 */
976 gem_interrupt(dev->irq, dev);
977 }
978 #endif
979
980 static void gem_tx_timeout(struct net_device *dev)
981 {
982 struct gem *gp = netdev_priv(dev);
983
984 printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
985 if (!gp->running) {
986 printk("%s: hrm.. hw not running !\n", dev->name);
987 return;
988 }
989 printk(KERN_ERR "%s: TX_STATE[%08x:%08x:%08x]\n",
990 dev->name,
991 readl(gp->regs + TXDMA_CFG),
992 readl(gp->regs + MAC_TXSTAT),
993 readl(gp->regs + MAC_TXCFG));
994 printk(KERN_ERR "%s: RX_STATE[%08x:%08x:%08x]\n",
995 dev->name,
996 readl(gp->regs + RXDMA_CFG),
997 readl(gp->regs + MAC_RXSTAT),
998 readl(gp->regs + MAC_RXCFG));
999
1000 spin_lock_irq(&gp->lock);
1001 spin_lock(&gp->tx_lock);
1002
1003 gp->reset_task_pending = 1;
1004 schedule_work(&gp->reset_task);
1005
1006 spin_unlock(&gp->tx_lock);
1007 spin_unlock_irq(&gp->lock);
1008 }
1009
1010 static __inline__ int gem_intme(int entry)
1011 {
1012 /* Algorithm: IRQ every 1/2 of descriptors. */
1013 if (!(entry & ((TX_RING_SIZE>>1)-1)))
1014 return 1;
1015
1016 return 0;
1017 }
1018
1019 static netdev_tx_t gem_start_xmit(struct sk_buff *skb,
1020 struct net_device *dev)
1021 {
1022 struct gem *gp = netdev_priv(dev);
1023 int entry;
1024 u64 ctrl;
1025 unsigned long flags;
1026
1027 ctrl = 0;
1028 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1029 const u64 csum_start_off = skb_transport_offset(skb);
1030 const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
1031
1032 ctrl = (TXDCTRL_CENAB |
1033 (csum_start_off << 15) |
1034 (csum_stuff_off << 21));
1035 }
1036
1037 local_irq_save(flags);
1038 if (!spin_trylock(&gp->tx_lock)) {
1039 /* Tell upper layer to requeue */
1040 local_irq_restore(flags);
1041 return NETDEV_TX_LOCKED;
1042 }
1043 /* We raced with gem_do_stop() */
1044 if (!gp->running) {
1045 spin_unlock_irqrestore(&gp->tx_lock, flags);
1046 return NETDEV_TX_BUSY;
1047 }
1048
1049 /* This is a hard error, log it. */
1050 if (TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1)) {
1051 netif_stop_queue(dev);
1052 spin_unlock_irqrestore(&gp->tx_lock, flags);
1053 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
1054 dev->name);
1055 return NETDEV_TX_BUSY;
1056 }
1057
1058 entry = gp->tx_new;
1059 gp->tx_skbs[entry] = skb;
1060
1061 if (skb_shinfo(skb)->nr_frags == 0) {
1062 struct gem_txd *txd = &gp->init_block->txd[entry];
1063 dma_addr_t mapping;
1064 u32 len;
1065
1066 len = skb->len;
1067 mapping = pci_map_page(gp->pdev,
1068 virt_to_page(skb->data),
1069 offset_in_page(skb->data),
1070 len, PCI_DMA_TODEVICE);
1071 ctrl |= TXDCTRL_SOF | TXDCTRL_EOF | len;
1072 if (gem_intme(entry))
1073 ctrl |= TXDCTRL_INTME;
1074 txd->buffer = cpu_to_le64(mapping);
1075 wmb();
1076 txd->control_word = cpu_to_le64(ctrl);
1077 entry = NEXT_TX(entry);
1078 } else {
1079 struct gem_txd *txd;
1080 u32 first_len;
1081 u64 intme;
1082 dma_addr_t first_mapping;
1083 int frag, first_entry = entry;
1084
1085 intme = 0;
1086 if (gem_intme(entry))
1087 intme |= TXDCTRL_INTME;
1088
1089 /* We must give this initial chunk to the device last.
1090 * Otherwise we could race with the device.
1091 */
1092 first_len = skb_headlen(skb);
1093 first_mapping = pci_map_page(gp->pdev, virt_to_page(skb->data),
1094 offset_in_page(skb->data),
1095 first_len, PCI_DMA_TODEVICE);
1096 entry = NEXT_TX(entry);
1097
1098 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
1099 skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
1100 u32 len;
1101 dma_addr_t mapping;
1102 u64 this_ctrl;
1103
1104 len = this_frag->size;
1105 mapping = pci_map_page(gp->pdev,
1106 this_frag->page,
1107 this_frag->page_offset,
1108 len, PCI_DMA_TODEVICE);
1109 this_ctrl = ctrl;
1110 if (frag == skb_shinfo(skb)->nr_frags - 1)
1111 this_ctrl |= TXDCTRL_EOF;
1112
1113 txd = &gp->init_block->txd[entry];
1114 txd->buffer = cpu_to_le64(mapping);
1115 wmb();
1116 txd->control_word = cpu_to_le64(this_ctrl | len);
1117
1118 if (gem_intme(entry))
1119 intme |= TXDCTRL_INTME;
1120
1121 entry = NEXT_TX(entry);
1122 }
1123 txd = &gp->init_block->txd[first_entry];
1124 txd->buffer = cpu_to_le64(first_mapping);
1125 wmb();
1126 txd->control_word =
1127 cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len);
1128 }
1129
1130 gp->tx_new = entry;
1131 if (TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1))
1132 netif_stop_queue(dev);
1133
1134 if (netif_msg_tx_queued(gp))
1135 printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n",
1136 dev->name, entry, skb->len);
1137 mb();
1138 writel(gp->tx_new, gp->regs + TXDMA_KICK);
1139 spin_unlock_irqrestore(&gp->tx_lock, flags);
1140
1141 dev->trans_start = jiffies;
1142
1143 return NETDEV_TX_OK;
1144 }
1145
1146 static void gem_pcs_reset(struct gem *gp)
1147 {
1148 int limit;
1149 u32 val;
1150
1151 /* Reset PCS unit. */
1152 val = readl(gp->regs + PCS_MIICTRL);
1153 val |= PCS_MIICTRL_RST;
1154 writel(val, gp->regs + PCS_MIICTRL);
1155
1156 limit = 32;
1157 while (readl(gp->regs + PCS_MIICTRL) & PCS_MIICTRL_RST) {
1158 udelay(100);
1159 if (limit-- <= 0)
1160 break;
1161 }
1162 if (limit < 0)
1163 printk(KERN_WARNING "%s: PCS reset bit would not clear.\n",
1164 gp->dev->name);
1165 }
1166
1167 static void gem_pcs_reinit_adv(struct gem *gp)
1168 {
1169 u32 val;
1170
1171 /* Make sure PCS is disabled while changing advertisement
1172 * configuration.
1173 */
1174 val = readl(gp->regs + PCS_CFG);
1175 val &= ~(PCS_CFG_ENABLE | PCS_CFG_TO);
1176 writel(val, gp->regs + PCS_CFG);
1177
1178 /* Advertise all capabilities except assymetric
1179 * pause.
1180 */
1181 val = readl(gp->regs + PCS_MIIADV);
1182 val |= (PCS_MIIADV_FD | PCS_MIIADV_HD |
1183 PCS_MIIADV_SP | PCS_MIIADV_AP);
1184 writel(val, gp->regs + PCS_MIIADV);
1185
1186 /* Enable and restart auto-negotiation, disable wrapback/loopback,
1187 * and re-enable PCS.
1188 */
1189 val = readl(gp->regs + PCS_MIICTRL);
1190 val |= (PCS_MIICTRL_RAN | PCS_MIICTRL_ANE);
1191 val &= ~PCS_MIICTRL_WB;
1192 writel(val, gp->regs + PCS_MIICTRL);
1193
1194 val = readl(gp->regs + PCS_CFG);
1195 val |= PCS_CFG_ENABLE;
1196 writel(val, gp->regs + PCS_CFG);
1197
1198 /* Make sure serialink loopback is off. The meaning
1199 * of this bit is logically inverted based upon whether
1200 * you are in Serialink or SERDES mode.
1201 */
1202 val = readl(gp->regs + PCS_SCTRL);
1203 if (gp->phy_type == phy_serialink)
1204 val &= ~PCS_SCTRL_LOOP;
1205 else
1206 val |= PCS_SCTRL_LOOP;
1207 writel(val, gp->regs + PCS_SCTRL);
1208 }
1209
1210 #define STOP_TRIES 32
1211
1212 /* Must be invoked under gp->lock and gp->tx_lock. */
1213 static void gem_reset(struct gem *gp)
1214 {
1215 int limit;
1216 u32 val;
1217
1218 /* Make sure we won't get any more interrupts */
1219 writel(0xffffffff, gp->regs + GREG_IMASK);
1220
1221 /* Reset the chip */
1222 writel(gp->swrst_base | GREG_SWRST_TXRST | GREG_SWRST_RXRST,
1223 gp->regs + GREG_SWRST);
1224
1225 limit = STOP_TRIES;
1226
1227 do {
1228 udelay(20);
1229 val = readl(gp->regs + GREG_SWRST);
1230 if (limit-- <= 0)
1231 break;
1232 } while (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST));
1233
1234 if (limit < 0)
1235 printk(KERN_ERR "%s: SW reset is ghetto.\n", gp->dev->name);
1236
1237 if (gp->phy_type == phy_serialink || gp->phy_type == phy_serdes)
1238 gem_pcs_reinit_adv(gp);
1239 }
1240
1241 /* Must be invoked under gp->lock and gp->tx_lock. */
1242 static void gem_start_dma(struct gem *gp)
1243 {
1244 u32 val;
1245
1246 /* We are ready to rock, turn everything on. */
1247 val = readl(gp->regs + TXDMA_CFG);
1248 writel(val | TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG);
1249 val = readl(gp->regs + RXDMA_CFG);
1250 writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
1251 val = readl(gp->regs + MAC_TXCFG);
1252 writel(val | MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
1253 val = readl(gp->regs + MAC_RXCFG);
1254 writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
1255
1256 (void) readl(gp->regs + MAC_RXCFG);
1257 udelay(100);
1258
1259 gem_enable_ints(gp);
1260
1261 writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK);
1262 }
1263
1264 /* Must be invoked under gp->lock and gp->tx_lock. DMA won't be
1265 * actually stopped before about 4ms tho ...
1266 */
1267 static void gem_stop_dma(struct gem *gp)
1268 {
1269 u32 val;
1270
1271 /* We are done rocking, turn everything off. */
1272 val = readl(gp->regs + TXDMA_CFG);
1273 writel(val & ~TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG);
1274 val = readl(gp->regs + RXDMA_CFG);
1275 writel(val & ~RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
1276 val = readl(gp->regs + MAC_TXCFG);
1277 writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
1278 val = readl(gp->regs + MAC_RXCFG);
1279 writel(val & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
1280
1281 (void) readl(gp->regs + MAC_RXCFG);
1282
1283 /* Need to wait a bit ... done by the caller */
1284 }
1285
1286
1287 /* Must be invoked under gp->lock and gp->tx_lock. */
1288 // XXX dbl check what that function should do when called on PCS PHY
1289 static void gem_begin_auto_negotiation(struct gem *gp, struct ethtool_cmd *ep)
1290 {
1291 u32 advertise, features;
1292 int autoneg;
1293 int speed;
1294 int duplex;
1295
1296 if (gp->phy_type != phy_mii_mdio0 &&
1297 gp->phy_type != phy_mii_mdio1)
1298 goto non_mii;
1299
1300 /* Setup advertise */
1301 if (found_mii_phy(gp))
1302 features = gp->phy_mii.def->features;
1303 else
1304 features = 0;
1305
1306 advertise = features & ADVERTISE_MASK;
1307 if (gp->phy_mii.advertising != 0)
1308 advertise &= gp->phy_mii.advertising;
1309
1310 autoneg = gp->want_autoneg;
1311 speed = gp->phy_mii.speed;
1312 duplex = gp->phy_mii.duplex;
1313
1314 /* Setup link parameters */
1315 if (!ep)
1316 goto start_aneg;
1317 if (ep->autoneg == AUTONEG_ENABLE) {
1318 advertise = ep->advertising;
1319 autoneg = 1;
1320 } else {
1321 autoneg = 0;
1322 speed = ep->speed;
1323 duplex = ep->duplex;
1324 }
1325
1326 start_aneg:
1327 /* Sanitize settings based on PHY capabilities */
1328 if ((features & SUPPORTED_Autoneg) == 0)
1329 autoneg = 0;
1330 if (speed == SPEED_1000 &&
1331 !(features & (SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)))
1332 speed = SPEED_100;
1333 if (speed == SPEED_100 &&
1334 !(features & (SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full)))
1335 speed = SPEED_10;
1336 if (duplex == DUPLEX_FULL &&
1337 !(features & (SUPPORTED_1000baseT_Full |
1338 SUPPORTED_100baseT_Full |
1339 SUPPORTED_10baseT_Full)))
1340 duplex = DUPLEX_HALF;
1341 if (speed == 0)
1342 speed = SPEED_10;
1343
1344 /* If we are asleep, we don't try to actually setup the PHY, we
1345 * just store the settings
1346 */
1347 if (gp->asleep) {
1348 gp->phy_mii.autoneg = gp->want_autoneg = autoneg;
1349 gp->phy_mii.speed = speed;
1350 gp->phy_mii.duplex = duplex;
1351 return;
1352 }
1353
1354 /* Configure PHY & start aneg */
1355 gp->want_autoneg = autoneg;
1356 if (autoneg) {
1357 if (found_mii_phy(gp))
1358 gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, advertise);
1359 gp->lstate = link_aneg;
1360 } else {
1361 if (found_mii_phy(gp))
1362 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, speed, duplex);
1363 gp->lstate = link_force_ok;
1364 }
1365
1366 non_mii:
1367 gp->timer_ticks = 0;
1368 mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10));
1369 }
1370
1371 /* A link-up condition has occurred, initialize and enable the
1372 * rest of the chip.
1373 *
1374 * Must be invoked under gp->lock and gp->tx_lock.
1375 */
1376 static int gem_set_link_modes(struct gem *gp)
1377 {
1378 u32 val;
1379 int full_duplex, speed, pause;
1380
1381 full_duplex = 0;
1382 speed = SPEED_10;
1383 pause = 0;
1384
1385 if (found_mii_phy(gp)) {
1386 if (gp->phy_mii.def->ops->read_link(&gp->phy_mii))
1387 return 1;
1388 full_duplex = (gp->phy_mii.duplex == DUPLEX_FULL);
1389 speed = gp->phy_mii.speed;
1390 pause = gp->phy_mii.pause;
1391 } else if (gp->phy_type == phy_serialink ||
1392 gp->phy_type == phy_serdes) {
1393 u32 pcs_lpa = readl(gp->regs + PCS_MIILP);
1394
1395 if ((pcs_lpa & PCS_MIIADV_FD) || gp->phy_type == phy_serdes)
1396 full_duplex = 1;
1397 speed = SPEED_1000;
1398 }
1399
1400 if (netif_msg_link(gp))
1401 printk(KERN_INFO "%s: Link is up at %d Mbps, %s-duplex.\n",
1402 gp->dev->name, speed, (full_duplex ? "full" : "half"));
1403
1404 if (!gp->running)
1405 return 0;
1406
1407 val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU);
1408 if (full_duplex) {
1409 val |= (MAC_TXCFG_ICS | MAC_TXCFG_ICOLL);
1410 } else {
1411 /* MAC_TXCFG_NBO must be zero. */
1412 }
1413 writel(val, gp->regs + MAC_TXCFG);
1414
1415 val = (MAC_XIFCFG_OE | MAC_XIFCFG_LLED);
1416 if (!full_duplex &&
1417 (gp->phy_type == phy_mii_mdio0 ||
1418 gp->phy_type == phy_mii_mdio1)) {
1419 val |= MAC_XIFCFG_DISE;
1420 } else if (full_duplex) {
1421 val |= MAC_XIFCFG_FLED;
1422 }
1423
1424 if (speed == SPEED_1000)
1425 val |= (MAC_XIFCFG_GMII);
1426
1427 writel(val, gp->regs + MAC_XIFCFG);
1428
1429 /* If gigabit and half-duplex, enable carrier extension
1430 * mode. Else, disable it.
1431 */
1432 if (speed == SPEED_1000 && !full_duplex) {
1433 val = readl(gp->regs + MAC_TXCFG);
1434 writel(val | MAC_TXCFG_TCE, gp->regs + MAC_TXCFG);
1435
1436 val = readl(gp->regs + MAC_RXCFG);
1437 writel(val | MAC_RXCFG_RCE, gp->regs + MAC_RXCFG);
1438 } else {
1439 val = readl(gp->regs + MAC_TXCFG);
1440 writel(val & ~MAC_TXCFG_TCE, gp->regs + MAC_TXCFG);
1441
1442 val = readl(gp->regs + MAC_RXCFG);
1443 writel(val & ~MAC_RXCFG_RCE, gp->regs + MAC_RXCFG);
1444 }
1445
1446 if (gp->phy_type == phy_serialink ||
1447 gp->phy_type == phy_serdes) {
1448 u32 pcs_lpa = readl(gp->regs + PCS_MIILP);
1449
1450 if (pcs_lpa & (PCS_MIIADV_SP | PCS_MIIADV_AP))
1451 pause = 1;
1452 }
1453
1454 if (netif_msg_link(gp)) {
1455 if (pause) {
1456 printk(KERN_INFO "%s: Pause is enabled "
1457 "(rxfifo: %d off: %d on: %d)\n",
1458 gp->dev->name,
1459 gp->rx_fifo_sz,
1460 gp->rx_pause_off,
1461 gp->rx_pause_on);
1462 } else {
1463 printk(KERN_INFO "%s: Pause is disabled\n",
1464 gp->dev->name);
1465 }
1466 }
1467
1468 if (!full_duplex)
1469 writel(512, gp->regs + MAC_STIME);
1470 else
1471 writel(64, gp->regs + MAC_STIME);
1472 val = readl(gp->regs + MAC_MCCFG);
1473 if (pause)
1474 val |= (MAC_MCCFG_SPE | MAC_MCCFG_RPE);
1475 else
1476 val &= ~(MAC_MCCFG_SPE | MAC_MCCFG_RPE);
1477 writel(val, gp->regs + MAC_MCCFG);
1478
1479 gem_start_dma(gp);
1480
1481 return 0;
1482 }
1483
1484 /* Must be invoked under gp->lock and gp->tx_lock. */
1485 static int gem_mdio_link_not_up(struct gem *gp)
1486 {
1487 switch (gp->lstate) {
1488 case link_force_ret:
1489 if (netif_msg_link(gp))
1490 printk(KERN_INFO "%s: Autoneg failed again, keeping"
1491 " forced mode\n", gp->dev->name);
1492 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii,
1493 gp->last_forced_speed, DUPLEX_HALF);
1494 gp->timer_ticks = 5;
1495 gp->lstate = link_force_ok;
1496 return 0;
1497 case link_aneg:
1498 /* We try forced modes after a failed aneg only on PHYs that don't
1499 * have "magic_aneg" bit set, which means they internally do the
1500 * while forced-mode thingy. On these, we just restart aneg
1501 */
1502 if (gp->phy_mii.def->magic_aneg)
1503 return 1;
1504 if (netif_msg_link(gp))
1505 printk(KERN_INFO "%s: switching to forced 100bt\n",
1506 gp->dev->name);
1507 /* Try forced modes. */
1508 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_100,
1509 DUPLEX_HALF);
1510 gp->timer_ticks = 5;
1511 gp->lstate = link_force_try;
1512 return 0;
1513 case link_force_try:
1514 /* Downgrade from 100 to 10 Mbps if necessary.
1515 * If already at 10Mbps, warn user about the
1516 * situation every 10 ticks.
1517 */
1518 if (gp->phy_mii.speed == SPEED_100) {
1519 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_10,
1520 DUPLEX_HALF);
1521 gp->timer_ticks = 5;
1522 if (netif_msg_link(gp))
1523 printk(KERN_INFO "%s: switching to forced 10bt\n",
1524 gp->dev->name);
1525 return 0;
1526 } else
1527 return 1;
1528 default:
1529 return 0;
1530 }
1531 }
1532
1533 static void gem_link_timer(unsigned long data)
1534 {
1535 struct gem *gp = (struct gem *) data;
1536 int restart_aneg = 0;
1537
1538 if (gp->asleep)
1539 return;
1540
1541 spin_lock_irq(&gp->lock);
1542 spin_lock(&gp->tx_lock);
1543 gem_get_cell(gp);
1544
1545 /* If the reset task is still pending, we just
1546 * reschedule the link timer
1547 */
1548 if (gp->reset_task_pending)
1549 goto restart;
1550
1551 if (gp->phy_type == phy_serialink ||
1552 gp->phy_type == phy_serdes) {
1553 u32 val = readl(gp->regs + PCS_MIISTAT);
1554
1555 if (!(val & PCS_MIISTAT_LS))
1556 val = readl(gp->regs + PCS_MIISTAT);
1557
1558 if ((val & PCS_MIISTAT_LS) != 0) {
1559 if (gp->lstate == link_up)
1560 goto restart;
1561
1562 gp->lstate = link_up;
1563 netif_carrier_on(gp->dev);
1564 (void)gem_set_link_modes(gp);
1565 }
1566 goto restart;
1567 }
1568 if (found_mii_phy(gp) && gp->phy_mii.def->ops->poll_link(&gp->phy_mii)) {
1569 /* Ok, here we got a link. If we had it due to a forced
1570 * fallback, and we were configured for autoneg, we do
1571 * retry a short autoneg pass. If you know your hub is
1572 * broken, use ethtool ;)
1573 */
1574 if (gp->lstate == link_force_try && gp->want_autoneg) {
1575 gp->lstate = link_force_ret;
1576 gp->last_forced_speed = gp->phy_mii.speed;
1577 gp->timer_ticks = 5;
1578 if (netif_msg_link(gp))
1579 printk(KERN_INFO "%s: Got link after fallback, retrying"
1580 " autoneg once...\n", gp->dev->name);
1581 gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, gp->phy_mii.advertising);
1582 } else if (gp->lstate != link_up) {
1583 gp->lstate = link_up;
1584 netif_carrier_on(gp->dev);
1585 if (gem_set_link_modes(gp))
1586 restart_aneg = 1;
1587 }
1588 } else {
1589 /* If the link was previously up, we restart the
1590 * whole process
1591 */
1592 if (gp->lstate == link_up) {
1593 gp->lstate = link_down;
1594 if (netif_msg_link(gp))
1595 printk(KERN_INFO "%s: Link down\n",
1596 gp->dev->name);
1597 netif_carrier_off(gp->dev);
1598 gp->reset_task_pending = 1;
1599 schedule_work(&gp->reset_task);
1600 restart_aneg = 1;
1601 } else if (++gp->timer_ticks > 10) {
1602 if (found_mii_phy(gp))
1603 restart_aneg = gem_mdio_link_not_up(gp);
1604 else
1605 restart_aneg = 1;
1606 }
1607 }
1608 if (restart_aneg) {
1609 gem_begin_auto_negotiation(gp, NULL);
1610 goto out_unlock;
1611 }
1612 restart:
1613 mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10));
1614 out_unlock:
1615 gem_put_cell(gp);
1616 spin_unlock(&gp->tx_lock);
1617 spin_unlock_irq(&gp->lock);
1618 }
1619
1620 /* Must be invoked under gp->lock and gp->tx_lock. */
1621 static void gem_clean_rings(struct gem *gp)
1622 {
1623 struct gem_init_block *gb = gp->init_block;
1624 struct sk_buff *skb;
1625 int i;
1626 dma_addr_t dma_addr;
1627
1628 for (i = 0; i < RX_RING_SIZE; i++) {
1629 struct gem_rxd *rxd;
1630
1631 rxd = &gb->rxd[i];
1632 if (gp->rx_skbs[i] != NULL) {
1633 skb = gp->rx_skbs[i];
1634 dma_addr = le64_to_cpu(rxd->buffer);
1635 pci_unmap_page(gp->pdev, dma_addr,
1636 RX_BUF_ALLOC_SIZE(gp),
1637 PCI_DMA_FROMDEVICE);
1638 dev_kfree_skb_any(skb);
1639 gp->rx_skbs[i] = NULL;
1640 }
1641 rxd->status_word = 0;
1642 wmb();
1643 rxd->buffer = 0;
1644 }
1645
1646 for (i = 0; i < TX_RING_SIZE; i++) {
1647 if (gp->tx_skbs[i] != NULL) {
1648 struct gem_txd *txd;
1649 int frag;
1650
1651 skb = gp->tx_skbs[i];
1652 gp->tx_skbs[i] = NULL;
1653
1654 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
1655 int ent = i & (TX_RING_SIZE - 1);
1656
1657 txd = &gb->txd[ent];
1658 dma_addr = le64_to_cpu(txd->buffer);
1659 pci_unmap_page(gp->pdev, dma_addr,
1660 le64_to_cpu(txd->control_word) &
1661 TXDCTRL_BUFSZ, PCI_DMA_TODEVICE);
1662
1663 if (frag != skb_shinfo(skb)->nr_frags)
1664 i++;
1665 }
1666 dev_kfree_skb_any(skb);
1667 }
1668 }
1669 }
1670
1671 /* Must be invoked under gp->lock and gp->tx_lock. */
1672 static void gem_init_rings(struct gem *gp)
1673 {
1674 struct gem_init_block *gb = gp->init_block;
1675 struct net_device *dev = gp->dev;
1676 int i;
1677 dma_addr_t dma_addr;
1678
1679 gp->rx_new = gp->rx_old = gp->tx_new = gp->tx_old = 0;
1680
1681 gem_clean_rings(gp);
1682
1683 gp->rx_buf_sz = max(dev->mtu + ETH_HLEN + VLAN_HLEN,
1684 (unsigned)VLAN_ETH_FRAME_LEN);
1685
1686 for (i = 0; i < RX_RING_SIZE; i++) {
1687 struct sk_buff *skb;
1688 struct gem_rxd *rxd = &gb->rxd[i];
1689
1690 skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC);
1691 if (!skb) {
1692 rxd->buffer = 0;
1693 rxd->status_word = 0;
1694 continue;
1695 }
1696
1697 gp->rx_skbs[i] = skb;
1698 skb->dev = dev;
1699 skb_put(skb, (gp->rx_buf_sz + RX_OFFSET));
1700 dma_addr = pci_map_page(gp->pdev,
1701 virt_to_page(skb->data),
1702 offset_in_page(skb->data),
1703 RX_BUF_ALLOC_SIZE(gp),
1704 PCI_DMA_FROMDEVICE);
1705 rxd->buffer = cpu_to_le64(dma_addr);
1706 wmb();
1707 rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp));
1708 skb_reserve(skb, RX_OFFSET);
1709 }
1710
1711 for (i = 0; i < TX_RING_SIZE; i++) {
1712 struct gem_txd *txd = &gb->txd[i];
1713
1714 txd->control_word = 0;
1715 wmb();
1716 txd->buffer = 0;
1717 }
1718 wmb();
1719 }
1720
1721 /* Init PHY interface and start link poll state machine */
1722 static void gem_init_phy(struct gem *gp)
1723 {
1724 u32 mifcfg;
1725
1726 /* Revert MIF CFG setting done on stop_phy */
1727 mifcfg = readl(gp->regs + MIF_CFG);
1728 mifcfg &= ~MIF_CFG_BBMODE;
1729 writel(mifcfg, gp->regs + MIF_CFG);
1730
1731 if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) {
1732 int i;
1733
1734 /* Those delay sucks, the HW seem to love them though, I'll
1735 * serisouly consider breaking some locks here to be able
1736 * to schedule instead
1737 */
1738 for (i = 0; i < 3; i++) {
1739 #ifdef CONFIG_PPC_PMAC
1740 pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0);
1741 msleep(20);
1742 #endif
1743 /* Some PHYs used by apple have problem getting back to us,
1744 * we do an additional reset here
1745 */
1746 phy_write(gp, MII_BMCR, BMCR_RESET);
1747 msleep(20);
1748 if (phy_read(gp, MII_BMCR) != 0xffff)
1749 break;
1750 if (i == 2)
1751 printk(KERN_WARNING "%s: GMAC PHY not responding !\n",
1752 gp->dev->name);
1753 }
1754 }
1755
1756 if (gp->pdev->vendor == PCI_VENDOR_ID_SUN &&
1757 gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) {
1758 u32 val;
1759
1760 /* Init datapath mode register. */
1761 if (gp->phy_type == phy_mii_mdio0 ||
1762 gp->phy_type == phy_mii_mdio1) {
1763 val = PCS_DMODE_MGM;
1764 } else if (gp->phy_type == phy_serialink) {
1765 val = PCS_DMODE_SM | PCS_DMODE_GMOE;
1766 } else {
1767 val = PCS_DMODE_ESM;
1768 }
1769
1770 writel(val, gp->regs + PCS_DMODE);
1771 }
1772
1773 if (gp->phy_type == phy_mii_mdio0 ||
1774 gp->phy_type == phy_mii_mdio1) {
1775 // XXX check for errors
1776 mii_phy_probe(&gp->phy_mii, gp->mii_phy_addr);
1777
1778 /* Init PHY */
1779 if (gp->phy_mii.def && gp->phy_mii.def->ops->init)
1780 gp->phy_mii.def->ops->init(&gp->phy_mii);
1781 } else {
1782 gem_pcs_reset(gp);
1783 gem_pcs_reinit_adv(gp);
1784 }
1785
1786 /* Default aneg parameters */
1787 gp->timer_ticks = 0;
1788 gp->lstate = link_down;
1789 netif_carrier_off(gp->dev);
1790
1791 /* Can I advertise gigabit here ? I'd need BCM PHY docs... */
1792 spin_lock_irq(&gp->lock);
1793 gem_begin_auto_negotiation(gp, NULL);
1794 spin_unlock_irq(&gp->lock);
1795 }
1796
1797 /* Must be invoked under gp->lock and gp->tx_lock. */
1798 static void gem_init_dma(struct gem *gp)
1799 {
1800 u64 desc_dma = (u64) gp->gblock_dvma;
1801 u32 val;
1802
1803 val = (TXDMA_CFG_BASE | (0x7ff << 10) | TXDMA_CFG_PMODE);
1804 writel(val, gp->regs + TXDMA_CFG);
1805
1806 writel(desc_dma >> 32, gp->regs + TXDMA_DBHI);
1807 writel(desc_dma & 0xffffffff, gp->regs + TXDMA_DBLOW);
1808 desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd));
1809
1810 writel(0, gp->regs + TXDMA_KICK);
1811
1812 val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) |
1813 ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128);
1814 writel(val, gp->regs + RXDMA_CFG);
1815
1816 writel(desc_dma >> 32, gp->regs + RXDMA_DBHI);
1817 writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW);
1818
1819 writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK);
1820
1821 val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF);
1822 val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON);
1823 writel(val, gp->regs + RXDMA_PTHRESH);
1824
1825 if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN)
1826 writel(((5 & RXDMA_BLANK_IPKTS) |
1827 ((8 << 12) & RXDMA_BLANK_ITIME)),
1828 gp->regs + RXDMA_BLANK);
1829 else
1830 writel(((5 & RXDMA_BLANK_IPKTS) |
1831 ((4 << 12) & RXDMA_BLANK_ITIME)),
1832 gp->regs + RXDMA_BLANK);
1833 }
1834
1835 /* Must be invoked under gp->lock and gp->tx_lock. */
1836 static u32 gem_setup_multicast(struct gem *gp)
1837 {
1838 u32 rxcfg = 0;
1839 int i;
1840
1841 if ((gp->dev->flags & IFF_ALLMULTI) ||
1842 (gp->dev->mc_count > 256)) {
1843 for (i=0; i<16; i++)
1844 writel(0xffff, gp->regs + MAC_HASH0 + (i << 2));
1845 rxcfg |= MAC_RXCFG_HFE;
1846 } else if (gp->dev->flags & IFF_PROMISC) {
1847 rxcfg |= MAC_RXCFG_PROM;
1848 } else {
1849 u16 hash_table[16];
1850 u32 crc;
1851 struct dev_mc_list *dmi = gp->dev->mc_list;
1852 int i;
1853
1854 for (i = 0; i < 16; i++)
1855 hash_table[i] = 0;
1856
1857 for (i = 0; i < gp->dev->mc_count; i++) {
1858 char *addrs = dmi->dmi_addr;
1859
1860 dmi = dmi->next;
1861
1862 if (!(*addrs & 1))
1863 continue;
1864
1865 crc = ether_crc_le(6, addrs);
1866 crc >>= 24;
1867 hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
1868 }
1869 for (i=0; i<16; i++)
1870 writel(hash_table[i], gp->regs + MAC_HASH0 + (i << 2));
1871 rxcfg |= MAC_RXCFG_HFE;
1872 }
1873
1874 return rxcfg;
1875 }
1876
1877 /* Must be invoked under gp->lock and gp->tx_lock. */
1878 static void gem_init_mac(struct gem *gp)
1879 {
1880 unsigned char *e = &gp->dev->dev_addr[0];
1881
1882 writel(0x1bf0, gp->regs + MAC_SNDPAUSE);
1883
1884 writel(0x00, gp->regs + MAC_IPG0);
1885 writel(0x08, gp->regs + MAC_IPG1);
1886 writel(0x04, gp->regs + MAC_IPG2);
1887 writel(0x40, gp->regs + MAC_STIME);
1888 writel(0x40, gp->regs + MAC_MINFSZ);
1889
1890 /* Ethernet payload + header + FCS + optional VLAN tag. */
1891 writel(0x20000000 | (gp->rx_buf_sz + 4), gp->regs + MAC_MAXFSZ);
1892
1893 writel(0x07, gp->regs + MAC_PASIZE);
1894 writel(0x04, gp->regs + MAC_JAMSIZE);
1895 writel(0x10, gp->regs + MAC_ATTLIM);
1896 writel(0x8808, gp->regs + MAC_MCTYPE);
1897
1898 writel((e[5] | (e[4] << 8)) & 0x3ff, gp->regs + MAC_RANDSEED);
1899
1900 writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0);
1901 writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1);
1902 writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2);
1903
1904 writel(0, gp->regs + MAC_ADDR3);
1905 writel(0, gp->regs + MAC_ADDR4);
1906 writel(0, gp->regs + MAC_ADDR5);
1907
1908 writel(0x0001, gp->regs + MAC_ADDR6);
1909 writel(0xc200, gp->regs + MAC_ADDR7);
1910 writel(0x0180, gp->regs + MAC_ADDR8);
1911
1912 writel(0, gp->regs + MAC_AFILT0);
1913 writel(0, gp->regs + MAC_AFILT1);
1914 writel(0, gp->regs + MAC_AFILT2);
1915 writel(0, gp->regs + MAC_AF21MSK);
1916 writel(0, gp->regs + MAC_AF0MSK);
1917
1918 gp->mac_rx_cfg = gem_setup_multicast(gp);
1919 #ifdef STRIP_FCS
1920 gp->mac_rx_cfg |= MAC_RXCFG_SFCS;
1921 #endif
1922 writel(0, gp->regs + MAC_NCOLL);
1923 writel(0, gp->regs + MAC_FASUCC);
1924 writel(0, gp->regs + MAC_ECOLL);
1925 writel(0, gp->regs + MAC_LCOLL);
1926 writel(0, gp->regs + MAC_DTIMER);
1927 writel(0, gp->regs + MAC_PATMPS);
1928 writel(0, gp->regs + MAC_RFCTR);
1929 writel(0, gp->regs + MAC_LERR);
1930 writel(0, gp->regs + MAC_AERR);
1931 writel(0, gp->regs + MAC_FCSERR);
1932 writel(0, gp->regs + MAC_RXCVERR);
1933
1934 /* Clear RX/TX/MAC/XIF config, we will set these up and enable
1935 * them once a link is established.
1936 */
1937 writel(0, gp->regs + MAC_TXCFG);
1938 writel(gp->mac_rx_cfg, gp->regs + MAC_RXCFG);
1939 writel(0, gp->regs + MAC_MCCFG);
1940 writel(0, gp->regs + MAC_XIFCFG);
1941
1942 /* Setup MAC interrupts. We want to get all of the interesting
1943 * counter expiration events, but we do not want to hear about
1944 * normal rx/tx as the DMA engine tells us that.
1945 */
1946 writel(MAC_TXSTAT_XMIT, gp->regs + MAC_TXMASK);
1947 writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK);
1948
1949 /* Don't enable even the PAUSE interrupts for now, we
1950 * make no use of those events other than to record them.
1951 */
1952 writel(0xffffffff, gp->regs + MAC_MCMASK);
1953
1954 /* Don't enable GEM's WOL in normal operations
1955 */
1956 if (gp->has_wol)
1957 writel(0, gp->regs + WOL_WAKECSR);
1958 }
1959
1960 /* Must be invoked under gp->lock and gp->tx_lock. */
1961 static void gem_init_pause_thresholds(struct gem *gp)
1962 {
1963 u32 cfg;
1964
1965 /* Calculate pause thresholds. Setting the OFF threshold to the
1966 * full RX fifo size effectively disables PAUSE generation which
1967 * is what we do for 10/100 only GEMs which have FIFOs too small
1968 * to make real gains from PAUSE.
1969 */
1970 if (gp->rx_fifo_sz <= (2 * 1024)) {
1971 gp->rx_pause_off = gp->rx_pause_on = gp->rx_fifo_sz;
1972 } else {
1973 int max_frame = (gp->rx_buf_sz + 4 + 64) & ~63;
1974 int off = (gp->rx_fifo_sz - (max_frame * 2));
1975 int on = off - max_frame;
1976
1977 gp->rx_pause_off = off;
1978 gp->rx_pause_on = on;
1979 }
1980
1981
1982 /* Configure the chip "burst" DMA mode & enable some
1983 * HW bug fixes on Apple version
1984 */
1985 cfg = 0;
1986 if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE)
1987 cfg |= GREG_CFG_RONPAULBIT | GREG_CFG_ENBUG2FIX;
1988 #if !defined(CONFIG_SPARC64) && !defined(CONFIG_ALPHA)
1989 cfg |= GREG_CFG_IBURST;
1990 #endif
1991 cfg |= ((31 << 1) & GREG_CFG_TXDMALIM);
1992 cfg |= ((31 << 6) & GREG_CFG_RXDMALIM);
1993 writel(cfg, gp->regs + GREG_CFG);
1994
1995 /* If Infinite Burst didn't stick, then use different
1996 * thresholds (and Apple bug fixes don't exist)
1997 */
1998 if (!(readl(gp->regs + GREG_CFG) & GREG_CFG_IBURST)) {
1999 cfg = ((2 << 1) & GREG_CFG_TXDMALIM);
2000 cfg |= ((8 << 6) & GREG_CFG_RXDMALIM);
2001 writel(cfg, gp->regs + GREG_CFG);
2002 }
2003 }
2004
2005 static int gem_check_invariants(struct gem *gp)
2006 {
2007 struct pci_dev *pdev = gp->pdev;
2008 u32 mif_cfg;
2009
2010 /* On Apple's sungem, we can't rely on registers as the chip
2011 * was been powered down by the firmware. The PHY is looked
2012 * up later on.
2013 */
2014 if (pdev->vendor == PCI_VENDOR_ID_APPLE) {
2015 gp->phy_type = phy_mii_mdio0;
2016 gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64;
2017 gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64;
2018 gp->swrst_base = 0;
2019
2020 mif_cfg = readl(gp->regs + MIF_CFG);
2021 mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1);
2022 mif_cfg |= MIF_CFG_MDI0;
2023 writel(mif_cfg, gp->regs + MIF_CFG);
2024 writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE);
2025 writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG);
2026
2027 /* We hard-code the PHY address so we can properly bring it out of
2028 * reset later on, we can't really probe it at this point, though
2029 * that isn't an issue.
2030 */
2031 if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC)
2032 gp->mii_phy_addr = 1;
2033 else
2034 gp->mii_phy_addr = 0;
2035
2036 return 0;
2037 }
2038
2039 mif_cfg = readl(gp->regs + MIF_CFG);
2040
2041 if (pdev->vendor == PCI_VENDOR_ID_SUN &&
2042 pdev->device == PCI_DEVICE_ID_SUN_RIO_GEM) {
2043 /* One of the MII PHYs _must_ be present
2044 * as this chip has no gigabit PHY.
2045 */
2046 if ((mif_cfg & (MIF_CFG_MDI0 | MIF_CFG_MDI1)) == 0) {
2047 printk(KERN_ERR PFX "RIO GEM lacks MII phy, mif_cfg[%08x]\n",
2048 mif_cfg);
2049 return -1;
2050 }
2051 }
2052
2053 /* Determine initial PHY interface type guess. MDIO1 is the
2054 * external PHY and thus takes precedence over MDIO0.
2055 */
2056
2057 if (mif_cfg & MIF_CFG_MDI1) {
2058 gp->phy_type = phy_mii_mdio1;
2059 mif_cfg |= MIF_CFG_PSELECT;
2060 writel(mif_cfg, gp->regs + MIF_CFG);
2061 } else if (mif_cfg & MIF_CFG_MDI0) {
2062 gp->phy_type = phy_mii_mdio0;
2063 mif_cfg &= ~MIF_CFG_PSELECT;
2064 writel(mif_cfg, gp->regs + MIF_CFG);
2065 } else {
2066 #ifdef CONFIG_SPARC
2067 const char *p;
2068
2069 p = of_get_property(gp->of_node, "shared-pins", NULL);
2070 if (p && !strcmp(p, "serdes"))
2071 gp->phy_type = phy_serdes;
2072 else
2073 #endif
2074 gp->phy_type = phy_serialink;
2075 }
2076 if (gp->phy_type == phy_mii_mdio1 ||
2077 gp->phy_type == phy_mii_mdio0) {
2078 int i;
2079
2080 for (i = 0; i < 32; i++) {
2081 gp->mii_phy_addr = i;
2082 if (phy_read(gp, MII_BMCR) != 0xffff)
2083 break;
2084 }
2085 if (i == 32) {
2086 if (pdev->device != PCI_DEVICE_ID_SUN_GEM) {
2087 printk(KERN_ERR PFX "RIO MII phy will not respond.\n");
2088 return -1;
2089 }
2090 gp->phy_type = phy_serdes;
2091 }
2092 }
2093
2094 /* Fetch the FIFO configurations now too. */
2095 gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64;
2096 gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64;
2097
2098 if (pdev->vendor == PCI_VENDOR_ID_SUN) {
2099 if (pdev->device == PCI_DEVICE_ID_SUN_GEM) {
2100 if (gp->tx_fifo_sz != (9 * 1024) ||
2101 gp->rx_fifo_sz != (20 * 1024)) {
2102 printk(KERN_ERR PFX "GEM has bogus fifo sizes tx(%d) rx(%d)\n",
2103 gp->tx_fifo_sz, gp->rx_fifo_sz);
2104 return -1;
2105 }
2106 gp->swrst_base = 0;
2107 } else {
2108 if (gp->tx_fifo_sz != (2 * 1024) ||
2109 gp->rx_fifo_sz != (2 * 1024)) {
2110 printk(KERN_ERR PFX "RIO GEM has bogus fifo sizes tx(%d) rx(%d)\n",
2111 gp->tx_fifo_sz, gp->rx_fifo_sz);
2112 return -1;
2113 }
2114 gp->swrst_base = (64 / 4) << GREG_SWRST_CACHE_SHIFT;
2115 }
2116 }
2117
2118 return 0;
2119 }
2120
2121 /* Must be invoked under gp->lock and gp->tx_lock. */
2122 static void gem_reinit_chip(struct gem *gp)
2123 {
2124 /* Reset the chip */
2125 gem_reset(gp);
2126
2127 /* Make sure ints are disabled */
2128 gem_disable_ints(gp);
2129
2130 /* Allocate & setup ring buffers */
2131 gem_init_rings(gp);
2132
2133 /* Configure pause thresholds */
2134 gem_init_pause_thresholds(gp);
2135
2136 /* Init DMA & MAC engines */
2137 gem_init_dma(gp);
2138 gem_init_mac(gp);
2139 }
2140
2141
2142 /* Must be invoked with no lock held. */
2143 static void gem_stop_phy(struct gem *gp, int wol)
2144 {
2145 u32 mifcfg;
2146 unsigned long flags;
2147
2148 /* Let the chip settle down a bit, it seems that helps
2149 * for sleep mode on some models
2150 */
2151 msleep(10);
2152
2153 /* Make sure we aren't polling PHY status change. We
2154 * don't currently use that feature though
2155 */
2156 mifcfg = readl(gp->regs + MIF_CFG);
2157 mifcfg &= ~MIF_CFG_POLL;
2158 writel(mifcfg, gp->regs + MIF_CFG);
2159
2160 if (wol && gp->has_wol) {
2161 unsigned char *e = &gp->dev->dev_addr[0];
2162 u32 csr;
2163
2164 /* Setup wake-on-lan for MAGIC packet */
2165 writel(MAC_RXCFG_HFE | MAC_RXCFG_SFCS | MAC_RXCFG_ENAB,
2166 gp->regs + MAC_RXCFG);
2167 writel((e[4] << 8) | e[5], gp->regs + WOL_MATCH0);
2168 writel((e[2] << 8) | e[3], gp->regs + WOL_MATCH1);
2169 writel((e[0] << 8) | e[1], gp->regs + WOL_MATCH2);
2170
2171 writel(WOL_MCOUNT_N | WOL_MCOUNT_M, gp->regs + WOL_MCOUNT);
2172 csr = WOL_WAKECSR_ENABLE;
2173 if ((readl(gp->regs + MAC_XIFCFG) & MAC_XIFCFG_GMII) == 0)
2174 csr |= WOL_WAKECSR_MII;
2175 writel(csr, gp->regs + WOL_WAKECSR);
2176 } else {
2177 writel(0, gp->regs + MAC_RXCFG);
2178 (void)readl(gp->regs + MAC_RXCFG);
2179 /* Machine sleep will die in strange ways if we
2180 * dont wait a bit here, looks like the chip takes
2181 * some time to really shut down
2182 */
2183 msleep(10);
2184 }
2185
2186 writel(0, gp->regs + MAC_TXCFG);
2187 writel(0, gp->regs + MAC_XIFCFG);
2188 writel(0, gp->regs + TXDMA_CFG);
2189 writel(0, gp->regs + RXDMA_CFG);
2190
2191 if (!wol) {
2192 spin_lock_irqsave(&gp->lock, flags);
2193 spin_lock(&gp->tx_lock);
2194 gem_reset(gp);
2195 writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST);
2196 writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST);
2197 spin_unlock(&gp->tx_lock);
2198 spin_unlock_irqrestore(&gp->lock, flags);
2199
2200 /* No need to take the lock here */
2201
2202 if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend)
2203 gp->phy_mii.def->ops->suspend(&gp->phy_mii);
2204
2205 /* According to Apple, we must set the MDIO pins to this begnign
2206 * state or we may 1) eat more current, 2) damage some PHYs
2207 */
2208 writel(mifcfg | MIF_CFG_BBMODE, gp->regs + MIF_CFG);
2209 writel(0, gp->regs + MIF_BBCLK);
2210 writel(0, gp->regs + MIF_BBDATA);
2211 writel(0, gp->regs + MIF_BBOENAB);
2212 writel(MAC_XIFCFG_GMII | MAC_XIFCFG_LBCK, gp->regs + MAC_XIFCFG);
2213 (void) readl(gp->regs + MAC_XIFCFG);
2214 }
2215 }
2216
2217
2218 static int gem_do_start(struct net_device *dev)
2219 {
2220 struct gem *gp = netdev_priv(dev);
2221 unsigned long flags;
2222
2223 spin_lock_irqsave(&gp->lock, flags);
2224 spin_lock(&gp->tx_lock);
2225
2226 /* Enable the cell */
2227 gem_get_cell(gp);
2228
2229 /* Init & setup chip hardware */
2230 gem_reinit_chip(gp);
2231
2232 gp->running = 1;
2233
2234 napi_enable(&gp->napi);
2235
2236 if (gp->lstate == link_up) {
2237 netif_carrier_on(gp->dev);
2238 gem_set_link_modes(gp);
2239 }
2240
2241 netif_wake_queue(gp->dev);
2242
2243 spin_unlock(&gp->tx_lock);
2244 spin_unlock_irqrestore(&gp->lock, flags);
2245
2246 if (request_irq(gp->pdev->irq, gem_interrupt,
2247 IRQF_SHARED, dev->name, (void *)dev)) {
2248 printk(KERN_ERR "%s: failed to request irq !\n", gp->dev->name);
2249
2250 spin_lock_irqsave(&gp->lock, flags);
2251 spin_lock(&gp->tx_lock);
2252
2253 napi_disable(&gp->napi);
2254
2255 gp->running = 0;
2256 gem_reset(gp);
2257 gem_clean_rings(gp);
2258 gem_put_cell(gp);
2259
2260 spin_unlock(&gp->tx_lock);
2261 spin_unlock_irqrestore(&gp->lock, flags);
2262
2263 return -EAGAIN;
2264 }
2265
2266 return 0;
2267 }
2268
2269 static void gem_do_stop(struct net_device *dev, int wol)
2270 {
2271 struct gem *gp = netdev_priv(dev);
2272 unsigned long flags;
2273
2274 spin_lock_irqsave(&gp->lock, flags);
2275 spin_lock(&gp->tx_lock);
2276
2277 gp->running = 0;
2278
2279 /* Stop netif queue */
2280 netif_stop_queue(dev);
2281
2282 /* Make sure ints are disabled */
2283 gem_disable_ints(gp);
2284
2285 /* We can drop the lock now */
2286 spin_unlock(&gp->tx_lock);
2287 spin_unlock_irqrestore(&gp->lock, flags);
2288
2289 /* If we are going to sleep with WOL */
2290 gem_stop_dma(gp);
2291 msleep(10);
2292 if (!wol)
2293 gem_reset(gp);
2294 msleep(10);
2295
2296 /* Get rid of rings */
2297 gem_clean_rings(gp);
2298
2299 /* No irq needed anymore */
2300 free_irq(gp->pdev->irq, (void *) dev);
2301
2302 /* Cell not needed neither if no WOL */
2303 if (!wol) {
2304 spin_lock_irqsave(&gp->lock, flags);
2305 gem_put_cell(gp);
2306 spin_unlock_irqrestore(&gp->lock, flags);
2307 }
2308 }
2309
2310 static void gem_reset_task(struct work_struct *work)
2311 {
2312 struct gem *gp = container_of(work, struct gem, reset_task);
2313
2314 mutex_lock(&gp->pm_mutex);
2315
2316 if (gp->opened)
2317 napi_disable(&gp->napi);
2318
2319 spin_lock_irq(&gp->lock);
2320 spin_lock(&gp->tx_lock);
2321
2322 if (gp->running) {
2323 netif_stop_queue(gp->dev);
2324
2325 /* Reset the chip & rings */
2326 gem_reinit_chip(gp);
2327 if (gp->lstate == link_up)
2328 gem_set_link_modes(gp);
2329 netif_wake_queue(gp->dev);
2330 }
2331
2332 gp->reset_task_pending = 0;
2333
2334 spin_unlock(&gp->tx_lock);
2335 spin_unlock_irq(&gp->lock);
2336
2337 if (gp->opened)
2338 napi_enable(&gp->napi);
2339
2340 mutex_unlock(&gp->pm_mutex);
2341 }
2342
2343
2344 static int gem_open(struct net_device *dev)
2345 {
2346 struct gem *gp = netdev_priv(dev);
2347 int rc = 0;
2348
2349 mutex_lock(&gp->pm_mutex);
2350
2351 /* We need the cell enabled */
2352 if (!gp->asleep)
2353 rc = gem_do_start(dev);
2354 gp->opened = (rc == 0);
2355
2356 mutex_unlock(&gp->pm_mutex);
2357
2358 return rc;
2359 }
2360
2361 static int gem_close(struct net_device *dev)
2362 {
2363 struct gem *gp = netdev_priv(dev);
2364
2365 mutex_lock(&gp->pm_mutex);
2366
2367 napi_disable(&gp->napi);
2368
2369 gp->opened = 0;
2370 if (!gp->asleep)
2371 gem_do_stop(dev, 0);
2372
2373 mutex_unlock(&gp->pm_mutex);
2374
2375 return 0;
2376 }
2377
2378 #ifdef CONFIG_PM
2379 static int gem_suspend(struct pci_dev *pdev, pm_message_t state)
2380 {
2381 struct net_device *dev = pci_get_drvdata(pdev);
2382 struct gem *gp = netdev_priv(dev);
2383 unsigned long flags;
2384
2385 mutex_lock(&gp->pm_mutex);
2386
2387 printk(KERN_INFO "%s: suspending, WakeOnLan %s\n",
2388 dev->name,
2389 (gp->wake_on_lan && gp->opened) ? "enabled" : "disabled");
2390
2391 /* Keep the cell enabled during the entire operation */
2392 spin_lock_irqsave(&gp->lock, flags);
2393 spin_lock(&gp->tx_lock);
2394 gem_get_cell(gp);
2395 spin_unlock(&gp->tx_lock);
2396 spin_unlock_irqrestore(&gp->lock, flags);
2397
2398 /* If the driver is opened, we stop the MAC */
2399 if (gp->opened) {
2400 napi_disable(&gp->napi);
2401
2402 /* Stop traffic, mark us closed */
2403 netif_device_detach(dev);
2404
2405 /* Switch off MAC, remember WOL setting */
2406 gp->asleep_wol = gp->wake_on_lan;
2407 gem_do_stop(dev, gp->asleep_wol);
2408 } else
2409 gp->asleep_wol = 0;
2410
2411 /* Mark us asleep */
2412 gp->asleep = 1;
2413 wmb();
2414
2415 /* Stop the link timer */
2416 del_timer_sync(&gp->link_timer);
2417
2418 /* Now we release the mutex to not block the reset task who
2419 * can take it too. We are marked asleep, so there will be no
2420 * conflict here
2421 */
2422 mutex_unlock(&gp->pm_mutex);
2423
2424 /* Wait for a pending reset task to complete */
2425 while (gp->reset_task_pending)
2426 yield();
2427 flush_scheduled_work();
2428
2429 /* Shut the PHY down eventually and setup WOL */
2430 gem_stop_phy(gp, gp->asleep_wol);
2431
2432 /* Make sure bus master is disabled */
2433 pci_disable_device(gp->pdev);
2434
2435 /* Release the cell, no need to take a lock at this point since
2436 * nothing else can happen now
2437 */
2438 gem_put_cell(gp);
2439
2440 return 0;
2441 }
2442
2443 static int gem_resume(struct pci_dev *pdev)
2444 {
2445 struct net_device *dev = pci_get_drvdata(pdev);
2446 struct gem *gp = netdev_priv(dev);
2447 unsigned long flags;
2448
2449 printk(KERN_INFO "%s: resuming\n", dev->name);
2450
2451 mutex_lock(&gp->pm_mutex);
2452
2453 /* Keep the cell enabled during the entire operation, no need to
2454 * take a lock here tho since nothing else can happen while we are
2455 * marked asleep
2456 */
2457 gem_get_cell(gp);
2458
2459 /* Make sure PCI access and bus master are enabled */
2460 if (pci_enable_device(gp->pdev)) {
2461 printk(KERN_ERR "%s: Can't re-enable chip !\n",
2462 dev->name);
2463 /* Put cell and forget it for now, it will be considered as
2464 * still asleep, a new sleep cycle may bring it back
2465 */
2466 gem_put_cell(gp);
2467 mutex_unlock(&gp->pm_mutex);
2468 return 0;
2469 }
2470 pci_set_master(gp->pdev);
2471
2472 /* Reset everything */
2473 gem_reset(gp);
2474
2475 /* Mark us woken up */
2476 gp->asleep = 0;
2477 wmb();
2478
2479 /* Bring the PHY back. Again, lock is useless at this point as
2480 * nothing can be happening until we restart the whole thing
2481 */
2482 gem_init_phy(gp);
2483
2484 /* If we were opened, bring everything back */
2485 if (gp->opened) {
2486 /* Restart MAC */
2487 gem_do_start(dev);
2488
2489 /* Re-attach net device */
2490 netif_device_attach(dev);
2491 }
2492
2493 spin_lock_irqsave(&gp->lock, flags);
2494 spin_lock(&gp->tx_lock);
2495
2496 /* If we had WOL enabled, the cell clock was never turned off during
2497 * sleep, so we end up beeing unbalanced. Fix that here
2498 */
2499 if (gp->asleep_wol)
2500 gem_put_cell(gp);
2501
2502 /* This function doesn't need to hold the cell, it will be held if the
2503 * driver is open by gem_do_start().
2504 */
2505 gem_put_cell(gp);
2506
2507 spin_unlock(&gp->tx_lock);
2508 spin_unlock_irqrestore(&gp->lock, flags);
2509
2510 mutex_unlock(&gp->pm_mutex);
2511
2512 return 0;
2513 }
2514 #endif /* CONFIG_PM */
2515
2516 static struct net_device_stats *gem_get_stats(struct net_device *dev)
2517 {
2518 struct gem *gp = netdev_priv(dev);
2519 struct net_device_stats *stats = &gp->net_stats;
2520
2521 spin_lock_irq(&gp->lock);
2522 spin_lock(&gp->tx_lock);
2523
2524 /* I have seen this being called while the PM was in progress,
2525 * so we shield against this
2526 */
2527 if (gp->running) {
2528 stats->rx_crc_errors += readl(gp->regs + MAC_FCSERR);
2529 writel(0, gp->regs + MAC_FCSERR);
2530
2531 stats->rx_frame_errors += readl(gp->regs + MAC_AERR);
2532 writel(0, gp->regs + MAC_AERR);
2533
2534 stats->rx_length_errors += readl(gp->regs + MAC_LERR);
2535 writel(0, gp->regs + MAC_LERR);
2536
2537 stats->tx_aborted_errors += readl(gp->regs + MAC_ECOLL);
2538 stats->collisions +=
2539 (readl(gp->regs + MAC_ECOLL) +
2540 readl(gp->regs + MAC_LCOLL));
2541 writel(0, gp->regs + MAC_ECOLL);
2542 writel(0, gp->regs + MAC_LCOLL);
2543 }
2544
2545 spin_unlock(&gp->tx_lock);
2546 spin_unlock_irq(&gp->lock);
2547
2548 return &gp->net_stats;
2549 }
2550
2551 static int gem_set_mac_address(struct net_device *dev, void *addr)
2552 {
2553 struct sockaddr *macaddr = (struct sockaddr *) addr;
2554 struct gem *gp = netdev_priv(dev);
2555 unsigned char *e = &dev->dev_addr[0];
2556
2557 if (!is_valid_ether_addr(macaddr->sa_data))
2558 return -EADDRNOTAVAIL;
2559
2560 if (!netif_running(dev) || !netif_device_present(dev)) {
2561 /* We'll just catch it later when the
2562 * device is up'd or resumed.
2563 */
2564 memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len);
2565 return 0;
2566 }
2567
2568 mutex_lock(&gp->pm_mutex);
2569 memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len);
2570 if (gp->running) {
2571 writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0);
2572 writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1);
2573 writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2);
2574 }
2575 mutex_unlock(&gp->pm_mutex);
2576
2577 return 0;
2578 }
2579
2580 static void gem_set_multicast(struct net_device *dev)
2581 {
2582 struct gem *gp = netdev_priv(dev);
2583 u32 rxcfg, rxcfg_new;
2584 int limit = 10000;
2585
2586
2587 spin_lock_irq(&gp->lock);
2588 spin_lock(&gp->tx_lock);
2589
2590 if (!gp->running)
2591 goto bail;
2592
2593 netif_stop_queue(dev);
2594
2595 rxcfg = readl(gp->regs + MAC_RXCFG);
2596 rxcfg_new = gem_setup_multicast(gp);
2597 #ifdef STRIP_FCS
2598 rxcfg_new |= MAC_RXCFG_SFCS;
2599 #endif
2600 gp->mac_rx_cfg = rxcfg_new;
2601
2602 writel(rxcfg & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
2603 while (readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB) {
2604 if (!limit--)
2605 break;
2606 udelay(10);
2607 }
2608
2609 rxcfg &= ~(MAC_RXCFG_PROM | MAC_RXCFG_HFE);
2610 rxcfg |= rxcfg_new;
2611
2612 writel(rxcfg, gp->regs + MAC_RXCFG);
2613
2614 netif_wake_queue(dev);
2615
2616 bail:
2617 spin_unlock(&gp->tx_lock);
2618 spin_unlock_irq(&gp->lock);
2619 }
2620
2621 /* Jumbo-grams don't seem to work :-( */
2622 #define GEM_MIN_MTU 68
2623 #if 1
2624 #define GEM_MAX_MTU 1500
2625 #else
2626 #define GEM_MAX_MTU 9000
2627 #endif
2628
2629 static int gem_change_mtu(struct net_device *dev, int new_mtu)
2630 {
2631 struct gem *gp = netdev_priv(dev);
2632
2633 if (new_mtu < GEM_MIN_MTU || new_mtu > GEM_MAX_MTU)
2634 return -EINVAL;
2635
2636 if (!netif_running(dev) || !netif_device_present(dev)) {
2637 /* We'll just catch it later when the
2638 * device is up'd or resumed.
2639 */
2640 dev->mtu = new_mtu;
2641 return 0;
2642 }
2643
2644 mutex_lock(&gp->pm_mutex);
2645 spin_lock_irq(&gp->lock);
2646 spin_lock(&gp->tx_lock);
2647 dev->mtu = new_mtu;
2648 if (gp->running) {
2649 gem_reinit_chip(gp);
2650 if (gp->lstate == link_up)
2651 gem_set_link_modes(gp);
2652 }
2653 spin_unlock(&gp->tx_lock);
2654 spin_unlock_irq(&gp->lock);
2655 mutex_unlock(&gp->pm_mutex);
2656
2657 return 0;
2658 }
2659
2660 static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2661 {
2662 struct gem *gp = netdev_priv(dev);
2663
2664 strcpy(info->driver, DRV_NAME);
2665 strcpy(info->version, DRV_VERSION);
2666 strcpy(info->bus_info, pci_name(gp->pdev));
2667 }
2668
2669 static int gem_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2670 {
2671 struct gem *gp = netdev_priv(dev);
2672
2673 if (gp->phy_type == phy_mii_mdio0 ||
2674 gp->phy_type == phy_mii_mdio1) {
2675 if (gp->phy_mii.def)
2676 cmd->supported = gp->phy_mii.def->features;
2677 else
2678 cmd->supported = (SUPPORTED_10baseT_Half |
2679 SUPPORTED_10baseT_Full);
2680
2681 /* XXX hardcoded stuff for now */
2682 cmd->port = PORT_MII;
2683 cmd->transceiver = XCVR_EXTERNAL;
2684 cmd->phy_address = 0; /* XXX fixed PHYAD */
2685
2686 /* Return current PHY settings */
2687 spin_lock_irq(&gp->lock);
2688 cmd->autoneg = gp->want_autoneg;
2689 cmd->speed = gp->phy_mii.speed;
2690 cmd->duplex = gp->phy_mii.duplex;
2691 cmd->advertising = gp->phy_mii.advertising;
2692
2693 /* If we started with a forced mode, we don't have a default
2694 * advertise set, we need to return something sensible so
2695 * userland can re-enable autoneg properly.
2696 */
2697 if (cmd->advertising == 0)
2698 cmd->advertising = cmd->supported;
2699 spin_unlock_irq(&gp->lock);
2700 } else { // XXX PCS ?
2701 cmd->supported =
2702 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2703 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2704 SUPPORTED_Autoneg);
2705 cmd->advertising = cmd->supported;
2706 cmd->speed = 0;
2707 cmd->duplex = cmd->port = cmd->phy_address =
2708 cmd->transceiver = cmd->autoneg = 0;
2709
2710 /* serdes means usually a Fibre connector, with most fixed */
2711 if (gp->phy_type == phy_serdes) {
2712 cmd->port = PORT_FIBRE;
2713 cmd->supported = (SUPPORTED_1000baseT_Half |
2714 SUPPORTED_1000baseT_Full |
2715 SUPPORTED_FIBRE | SUPPORTED_Autoneg |
2716 SUPPORTED_Pause | SUPPORTED_Asym_Pause);
2717 cmd->advertising = cmd->supported;
2718 cmd->transceiver = XCVR_INTERNAL;
2719 if (gp->lstate == link_up)
2720 cmd->speed = SPEED_1000;
2721 cmd->duplex = DUPLEX_FULL;
2722 cmd->autoneg = 1;
2723 }
2724 }
2725 cmd->maxtxpkt = cmd->maxrxpkt = 0;
2726
2727 return 0;
2728 }
2729
2730 static int gem_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2731 {
2732 struct gem *gp = netdev_priv(dev);
2733
2734 /* Verify the settings we care about. */
2735 if (cmd->autoneg != AUTONEG_ENABLE &&
2736 cmd->autoneg != AUTONEG_DISABLE)
2737 return -EINVAL;
2738
2739 if (cmd->autoneg == AUTONEG_ENABLE &&
2740 cmd->advertising == 0)
2741 return -EINVAL;
2742
2743 if (cmd->autoneg == AUTONEG_DISABLE &&
2744 ((cmd->speed != SPEED_1000 &&
2745 cmd->speed != SPEED_100 &&
2746 cmd->speed != SPEED_10) ||
2747 (cmd->duplex != DUPLEX_HALF &&
2748 cmd->duplex != DUPLEX_FULL)))
2749 return -EINVAL;
2750
2751 /* Apply settings and restart link process. */
2752 spin_lock_irq(&gp->lock);
2753 gem_get_cell(gp);
2754 gem_begin_auto_negotiation(gp, cmd);
2755 gem_put_cell(gp);
2756 spin_unlock_irq(&gp->lock);
2757
2758 return 0;
2759 }
2760
2761 static int gem_nway_reset(struct net_device *dev)
2762 {
2763 struct gem *gp = netdev_priv(dev);
2764
2765 if (!gp->want_autoneg)
2766 return -EINVAL;
2767
2768 /* Restart link process. */
2769 spin_lock_irq(&gp->lock);
2770 gem_get_cell(gp);
2771 gem_begin_auto_negotiation(gp, NULL);
2772 gem_put_cell(gp);
2773 spin_unlock_irq(&gp->lock);
2774
2775 return 0;
2776 }
2777
2778 static u32 gem_get_msglevel(struct net_device *dev)
2779 {
2780 struct gem *gp = netdev_priv(dev);
2781 return gp->msg_enable;
2782 }
2783
2784 static void gem_set_msglevel(struct net_device *dev, u32 value)
2785 {
2786 struct gem *gp = netdev_priv(dev);
2787 gp->msg_enable = value;
2788 }
2789
2790
2791 /* Add more when I understand how to program the chip */
2792 /* like WAKE_UCAST | WAKE_MCAST | WAKE_BCAST */
2793
2794 #define WOL_SUPPORTED_MASK (WAKE_MAGIC)
2795
2796 static void gem_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2797 {
2798 struct gem *gp = netdev_priv(dev);
2799
2800 /* Add more when I understand how to program the chip */
2801 if (gp->has_wol) {
2802 wol->supported = WOL_SUPPORTED_MASK;
2803 wol->wolopts = gp->wake_on_lan;
2804 } else {
2805 wol->supported = 0;
2806 wol->wolopts = 0;
2807 }
2808 }
2809
2810 static int gem_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2811 {
2812 struct gem *gp = netdev_priv(dev);
2813
2814 if (!gp->has_wol)
2815 return -EOPNOTSUPP;
2816 gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK;
2817 return 0;
2818 }
2819
2820 static const struct ethtool_ops gem_ethtool_ops = {
2821 .get_drvinfo = gem_get_drvinfo,
2822 .get_link = ethtool_op_get_link,
2823 .get_settings = gem_get_settings,
2824 .set_settings = gem_set_settings,
2825 .nway_reset = gem_nway_reset,
2826 .get_msglevel = gem_get_msglevel,
2827 .set_msglevel = gem_set_msglevel,
2828 .get_wol = gem_get_wol,
2829 .set_wol = gem_set_wol,
2830 };
2831
2832 static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2833 {
2834 struct gem *gp = netdev_priv(dev);
2835 struct mii_ioctl_data *data = if_mii(ifr);
2836 int rc = -EOPNOTSUPP;
2837 unsigned long flags;
2838
2839 /* Hold the PM mutex while doing ioctl's or we may collide
2840 * with power management.
2841 */
2842 mutex_lock(&gp->pm_mutex);
2843
2844 spin_lock_irqsave(&gp->lock, flags);
2845 gem_get_cell(gp);
2846 spin_unlock_irqrestore(&gp->lock, flags);
2847
2848 switch (cmd) {
2849 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2850 data->phy_id = gp->mii_phy_addr;
2851 /* Fallthrough... */
2852
2853 case SIOCGMIIREG: /* Read MII PHY register. */
2854 if (!gp->running)
2855 rc = -EAGAIN;
2856 else {
2857 data->val_out = __phy_read(gp, data->phy_id & 0x1f,
2858 data->reg_num & 0x1f);
2859 rc = 0;
2860 }
2861 break;
2862
2863 case SIOCSMIIREG: /* Write MII PHY register. */
2864 if (!gp->running)
2865 rc = -EAGAIN;
2866 else {
2867 __phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f,
2868 data->val_in);
2869 rc = 0;
2870 }
2871 break;
2872 };
2873
2874 spin_lock_irqsave(&gp->lock, flags);
2875 gem_put_cell(gp);
2876 spin_unlock_irqrestore(&gp->lock, flags);
2877
2878 mutex_unlock(&gp->pm_mutex);
2879
2880 return rc;
2881 }
2882
2883 #if (!defined(CONFIG_SPARC) && !defined(CONFIG_PPC_PMAC))
2884 /* Fetch MAC address from vital product data of PCI ROM. */
2885 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr)
2886 {
2887 int this_offset;
2888
2889 for (this_offset = 0x20; this_offset < len; this_offset++) {
2890 void __iomem *p = rom_base + this_offset;
2891 int i;
2892
2893 if (readb(p + 0) != 0x90 ||
2894 readb(p + 1) != 0x00 ||
2895 readb(p + 2) != 0x09 ||
2896 readb(p + 3) != 0x4e ||
2897 readb(p + 4) != 0x41 ||
2898 readb(p + 5) != 0x06)
2899 continue;
2900
2901 this_offset += 6;
2902 p += 6;
2903
2904 for (i = 0; i < 6; i++)
2905 dev_addr[i] = readb(p + i);
2906 return 1;
2907 }
2908 return 0;
2909 }
2910
2911 static void get_gem_mac_nonobp(struct pci_dev *pdev, unsigned char *dev_addr)
2912 {
2913 size_t size;
2914 void __iomem *p = pci_map_rom(pdev, &size);
2915
2916 if (p) {
2917 int found;
2918
2919 found = readb(p) == 0x55 &&
2920 readb(p + 1) == 0xaa &&
2921 find_eth_addr_in_vpd(p, (64 * 1024), dev_addr);
2922 pci_unmap_rom(pdev, p);
2923 if (found)
2924 return;
2925 }
2926
2927 /* Sun MAC prefix then 3 random bytes. */
2928 dev_addr[0] = 0x08;
2929 dev_addr[1] = 0x00;
2930 dev_addr[2] = 0x20;
2931 get_random_bytes(dev_addr + 3, 3);
2932 return;
2933 }
2934 #endif /* not Sparc and not PPC */
2935
2936 static int __devinit gem_get_device_address(struct gem *gp)
2937 {
2938 #if defined(CONFIG_SPARC) || defined(CONFIG_PPC_PMAC)
2939 struct net_device *dev = gp->dev;
2940 const unsigned char *addr;
2941
2942 addr = of_get_property(gp->of_node, "local-mac-address", NULL);
2943 if (addr == NULL) {
2944 #ifdef CONFIG_SPARC
2945 addr = idprom->id_ethaddr;
2946 #else
2947 printk("\n");
2948 printk(KERN_ERR "%s: can't get mac-address\n", dev->name);
2949 return -1;
2950 #endif
2951 }
2952 memcpy(dev->dev_addr, addr, 6);
2953 #else
2954 get_gem_mac_nonobp(gp->pdev, gp->dev->dev_addr);
2955 #endif
2956 return 0;
2957 }
2958
2959 static void gem_remove_one(struct pci_dev *pdev)
2960 {
2961 struct net_device *dev = pci_get_drvdata(pdev);
2962
2963 if (dev) {
2964 struct gem *gp = netdev_priv(dev);
2965
2966 unregister_netdev(dev);
2967
2968 /* Stop the link timer */
2969 del_timer_sync(&gp->link_timer);
2970
2971 /* We shouldn't need any locking here */
2972 gem_get_cell(gp);
2973
2974 /* Wait for a pending reset task to complete */
2975 while (gp->reset_task_pending)
2976 yield();
2977 flush_scheduled_work();
2978
2979 /* Shut the PHY down */
2980 gem_stop_phy(gp, 0);
2981
2982 gem_put_cell(gp);
2983
2984 /* Make sure bus master is disabled */
2985 pci_disable_device(gp->pdev);
2986
2987 /* Free resources */
2988 pci_free_consistent(pdev,
2989 sizeof(struct gem_init_block),
2990 gp->init_block,
2991 gp->gblock_dvma);
2992 iounmap(gp->regs);
2993 pci_release_regions(pdev);
2994 free_netdev(dev);
2995
2996 pci_set_drvdata(pdev, NULL);
2997 }
2998 }
2999
3000 static const struct net_device_ops gem_netdev_ops = {
3001 .ndo_open = gem_open,
3002 .ndo_stop = gem_close,
3003 .ndo_start_xmit = gem_start_xmit,
3004 .ndo_get_stats = gem_get_stats,
3005 .ndo_set_multicast_list = gem_set_multicast,
3006 .ndo_do_ioctl = gem_ioctl,
3007 .ndo_tx_timeout = gem_tx_timeout,
3008 .ndo_change_mtu = gem_change_mtu,
3009 .ndo_validate_addr = eth_validate_addr,
3010 .ndo_set_mac_address = gem_set_mac_address,
3011 #ifdef CONFIG_NET_POLL_CONTROLLER
3012 .ndo_poll_controller = gem_poll_controller,
3013 #endif
3014 };
3015
3016 static int __devinit gem_init_one(struct pci_dev *pdev,
3017 const struct pci_device_id *ent)
3018 {
3019 static int gem_version_printed = 0;
3020 unsigned long gemreg_base, gemreg_len;
3021 struct net_device *dev;
3022 struct gem *gp;
3023 int err, pci_using_dac;
3024
3025 if (gem_version_printed++ == 0)
3026 printk(KERN_INFO "%s", version);
3027
3028 /* Apple gmac note: during probe, the chip is powered up by
3029 * the arch code to allow the code below to work (and to let
3030 * the chip be probed on the config space. It won't stay powered
3031 * up until the interface is brought up however, so we can't rely
3032 * on register configuration done at this point.
3033 */
3034 err = pci_enable_device(pdev);
3035 if (err) {
3036 printk(KERN_ERR PFX "Cannot enable MMIO operation, "
3037 "aborting.\n");
3038 return err;
3039 }
3040 pci_set_master(pdev);
3041
3042 /* Configure DMA attributes. */
3043
3044 /* All of the GEM documentation states that 64-bit DMA addressing
3045 * is fully supported and should work just fine. However the
3046 * front end for RIO based GEMs is different and only supports
3047 * 32-bit addressing.
3048 *
3049 * For now we assume the various PPC GEMs are 32-bit only as well.
3050 */
3051 if (pdev->vendor == PCI_VENDOR_ID_SUN &&
3052 pdev->device == PCI_DEVICE_ID_SUN_GEM &&
3053 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
3054 pci_using_dac = 1;
3055 } else {
3056 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3057 if (err) {
3058 printk(KERN_ERR PFX "No usable DMA configuration, "
3059 "aborting.\n");
3060 goto err_disable_device;
3061 }
3062 pci_using_dac = 0;
3063 }
3064
3065 gemreg_base = pci_resource_start(pdev, 0);
3066 gemreg_len = pci_resource_len(pdev, 0);
3067
3068 if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
3069 printk(KERN_ERR PFX "Cannot find proper PCI device "
3070 "base address, aborting.\n");
3071 err = -ENODEV;
3072 goto err_disable_device;
3073 }
3074
3075 dev = alloc_etherdev(sizeof(*gp));
3076 if (!dev) {
3077 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
3078 err = -ENOMEM;
3079 goto err_disable_device;
3080 }
3081 SET_NETDEV_DEV(dev, &pdev->dev);
3082
3083 gp = netdev_priv(dev);
3084
3085 err = pci_request_regions(pdev, DRV_NAME);
3086 if (err) {
3087 printk(KERN_ERR PFX "Cannot obtain PCI resources, "
3088 "aborting.\n");
3089 goto err_out_free_netdev;
3090 }
3091
3092 gp->pdev = pdev;
3093 dev->base_addr = (long) pdev;
3094 gp->dev = dev;
3095
3096 gp->msg_enable = DEFAULT_MSG;
3097
3098 spin_lock_init(&gp->lock);
3099 spin_lock_init(&gp->tx_lock);
3100 mutex_init(&gp->pm_mutex);
3101
3102 init_timer(&gp->link_timer);
3103 gp->link_timer.function = gem_link_timer;
3104 gp->link_timer.data = (unsigned long) gp;
3105
3106 INIT_WORK(&gp->reset_task, gem_reset_task);
3107
3108 gp->lstate = link_down;
3109 gp->timer_ticks = 0;
3110 netif_carrier_off(dev);
3111
3112 gp->regs = ioremap(gemreg_base, gemreg_len);
3113 if (!gp->regs) {
3114 printk(KERN_ERR PFX "Cannot map device registers, "
3115 "aborting.\n");
3116 err = -EIO;
3117 goto err_out_free_res;
3118 }
3119
3120 /* On Apple, we want a reference to the Open Firmware device-tree
3121 * node. We use it for clock control.
3122 */
3123 #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_SPARC)
3124 gp->of_node = pci_device_to_OF_node(pdev);
3125 #endif
3126
3127 /* Only Apple version supports WOL afaik */
3128 if (pdev->vendor == PCI_VENDOR_ID_APPLE)
3129 gp->has_wol = 1;
3130
3131 /* Make sure cell is enabled */
3132 gem_get_cell(gp);
3133
3134 /* Make sure everything is stopped and in init state */
3135 gem_reset(gp);
3136
3137 /* Fill up the mii_phy structure (even if we won't use it) */
3138 gp->phy_mii.dev = dev;
3139 gp->phy_mii.mdio_read = _phy_read;
3140 gp->phy_mii.mdio_write = _phy_write;
3141 #ifdef CONFIG_PPC_PMAC
3142 gp->phy_mii.platform_data = gp->of_node;
3143 #endif
3144 /* By default, we start with autoneg */
3145 gp->want_autoneg = 1;
3146
3147 /* Check fifo sizes, PHY type, etc... */
3148 if (gem_check_invariants(gp)) {
3149 err = -ENODEV;
3150 goto err_out_iounmap;
3151 }
3152
3153 /* It is guaranteed that the returned buffer will be at least
3154 * PAGE_SIZE aligned.
3155 */
3156 gp->init_block = (struct gem_init_block *)
3157 pci_alloc_consistent(pdev, sizeof(struct gem_init_block),
3158 &gp->gblock_dvma);
3159 if (!gp->init_block) {
3160 printk(KERN_ERR PFX "Cannot allocate init block, "
3161 "aborting.\n");
3162 err = -ENOMEM;
3163 goto err_out_iounmap;
3164 }
3165
3166 if (gem_get_device_address(gp))
3167 goto err_out_free_consistent;
3168
3169 dev->netdev_ops = &gem_netdev_ops;
3170 netif_napi_add(dev, &gp->napi, gem_poll, 64);
3171 dev->ethtool_ops = &gem_ethtool_ops;
3172 dev->watchdog_timeo = 5 * HZ;
3173 dev->irq = pdev->irq;
3174 dev->dma = 0;
3175
3176 /* Set that now, in case PM kicks in now */
3177 pci_set_drvdata(pdev, dev);
3178
3179 /* Detect & init PHY, start autoneg, we release the cell now
3180 * too, it will be managed by whoever needs it
3181 */
3182 gem_init_phy(gp);
3183
3184 spin_lock_irq(&gp->lock);
3185 gem_put_cell(gp);
3186 spin_unlock_irq(&gp->lock);
3187
3188 /* Register with kernel */
3189 if (register_netdev(dev)) {
3190 printk(KERN_ERR PFX "Cannot register net device, "
3191 "aborting.\n");
3192 err = -ENOMEM;
3193 goto err_out_free_consistent;
3194 }
3195
3196 printk(KERN_INFO "%s: Sun GEM (PCI) 10/100/1000BaseT Ethernet %pM\n",
3197 dev->name, dev->dev_addr);
3198
3199 if (gp->phy_type == phy_mii_mdio0 ||
3200 gp->phy_type == phy_mii_mdio1)
3201 printk(KERN_INFO "%s: Found %s PHY\n", dev->name,
3202 gp->phy_mii.def ? gp->phy_mii.def->name : "no");
3203
3204 /* GEM can do it all... */
3205 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_LLTX;
3206 if (pci_using_dac)
3207 dev->features |= NETIF_F_HIGHDMA;
3208
3209 return 0;
3210
3211 err_out_free_consistent:
3212 gem_remove_one(pdev);
3213 err_out_iounmap:
3214 gem_put_cell(gp);
3215 iounmap(gp->regs);
3216
3217 err_out_free_res:
3218 pci_release_regions(pdev);
3219
3220 err_out_free_netdev:
3221 free_netdev(dev);
3222 err_disable_device:
3223 pci_disable_device(pdev);
3224 return err;
3225
3226 }
3227
3228
3229 static struct pci_driver gem_driver = {
3230 .name = GEM_MODULE_NAME,
3231 .id_table = gem_pci_tbl,
3232 .probe = gem_init_one,
3233 .remove = gem_remove_one,
3234 #ifdef CONFIG_PM
3235 .suspend = gem_suspend,
3236 .resume = gem_resume,
3237 #endif /* CONFIG_PM */
3238 };
3239
3240 static int __init gem_init(void)
3241 {
3242 return pci_register_driver(&gem_driver);
3243 }
3244
3245 static void __exit gem_cleanup(void)
3246 {
3247 pci_unregister_driver(&gem_driver);
3248 }
3249
3250 module_init(gem_init);
3251 module_exit(gem_cleanup);
Support for the Chinese Samsung S3C2440 based development boards