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ibm_newemac: Fix new MAL feature handling
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ibm_newemac / core.c
blob2ee2622258f587c40196a8917ba78dcf6952b397
1 /*
2 * drivers/net/ibm_newemac/core.c
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller.
5 *
6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
7 * <benh@kernel.crashing.org>
8 *
9 * Based on the arch/ppc version of the driver:
10 *
11 * Copyright (c) 2004, 2005 Zultys Technologies.
12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
13 *
14 * Based on original work by
15 * Matt Porter <mporter@kernel.crashing.org>
16 * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
17 * Armin Kuster <akuster@mvista.com>
18 * Johnnie Peters <jpeters@mvista.com>
19 *
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms of the GNU General Public License as published by the
22 * Free Software Foundation; either version 2 of the License, or (at your
23 * option) any later version.
24 *
25 */
26
27 #include <linux/sched.h>
28 #include <linux/string.h>
29 #include <linux/errno.h>
30 #include <linux/delay.h>
31 #include <linux/types.h>
32 #include <linux/pci.h>
33 #include <linux/etherdevice.h>
34 #include <linux/skbuff.h>
35 #include <linux/crc32.h>
36 #include <linux/ethtool.h>
37 #include <linux/mii.h>
38 #include <linux/bitops.h>
39 #include <linux/workqueue.h>
40 #include <linux/of.h>
41
42 #include <asm/processor.h>
43 #include <asm/io.h>
44 #include <asm/dma.h>
45 #include <asm/uaccess.h>
46 #include <asm/dcr.h>
47 #include <asm/dcr-regs.h>
48
49 #include "core.h"
50
51 /*
52 * Lack of dma_unmap_???? calls is intentional.
53 *
54 * API-correct usage requires additional support state information to be
55 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
56 * EMAC design (e.g. TX buffer passed from network stack can be split into
57 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
58 * maintaining such information will add additional overhead.
59 * Current DMA API implementation for 4xx processors only ensures cache coherency
60 * and dma_unmap_???? routines are empty and are likely to stay this way.
61 * I decided to omit dma_unmap_??? calls because I don't want to add additional
62 * complexity just for the sake of following some abstract API, when it doesn't
63 * add any real benefit to the driver. I understand that this decision maybe
64 * controversial, but I really tried to make code API-correct and efficient
65 * at the same time and didn't come up with code I liked :(. --ebs
66 */
67
68 #define DRV_NAME "emac"
69 #define DRV_VERSION "3.54"
70 #define DRV_DESC "PPC 4xx OCP EMAC driver"
71
72 MODULE_DESCRIPTION(DRV_DESC);
73 MODULE_AUTHOR
74 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
75 MODULE_LICENSE("GPL");
76
77 /*
78 * PPC64 doesn't (yet) have a cacheable_memcpy
79 */
80 #ifdef CONFIG_PPC64
81 #define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
82 #endif
83
84 /* minimum number of free TX descriptors required to wake up TX process */
85 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
86
87 /* If packet size is less than this number, we allocate small skb and copy packet
88 * contents into it instead of just sending original big skb up
89 */
90 #define EMAC_RX_COPY_THRESH CONFIG_IBM_NEW_EMAC_RX_COPY_THRESHOLD
91
92 /* Since multiple EMACs share MDIO lines in various ways, we need
93 * to avoid re-using the same PHY ID in cases where the arch didn't
94 * setup precise phy_map entries
95 *
96 * XXX This is something that needs to be reworked as we can have multiple
97 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
98 * probably require in that case to have explicit PHY IDs in the device-tree
99 */
100 static u32 busy_phy_map;
101 static DEFINE_MUTEX(emac_phy_map_lock);
102
103 /* This is the wait queue used to wait on any event related to probe, that
104 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
105 */
106 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
107
108 /* Having stable interface names is a doomed idea. However, it would be nice
109 * if we didn't have completely random interface names at boot too :-) It's
110 * just a matter of making everybody's life easier. Since we are doing
111 * threaded probing, it's a bit harder though. The base idea here is that
112 * we make up a list of all emacs in the device-tree before we register the
113 * driver. Every emac will then wait for the previous one in the list to
114 * initialize before itself. We should also keep that list ordered by
115 * cell_index.
116 * That list is only 4 entries long, meaning that additional EMACs don't
117 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
118 */
119
120 #define EMAC_BOOT_LIST_SIZE 4
121 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
122
123 /* How long should I wait for dependent devices ? */
124 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
125
126 /* I don't want to litter system log with timeout errors
127 * when we have brain-damaged PHY.
128 */
129 static inline void emac_report_timeout_error(struct emac_instance *dev,
130 const char *error)
131 {
132 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
133 EMAC_FTR_460EX_PHY_CLK_FIX |
134 EMAC_FTR_440EP_PHY_CLK_FIX))
135 DBG(dev, "%s" NL, error);
136 else if (net_ratelimit())
137 printk(KERN_ERR "%s: %s\n", dev->ndev->name, error);
138 }
139
140 /* EMAC PHY clock workaround:
141 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
142 * which allows controlling each EMAC clock
143 */
144 static inline void emac_rx_clk_tx(struct emac_instance *dev)
145 {
146 #ifdef CONFIG_PPC_DCR_NATIVE
147 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
148 dcri_clrset(SDR0, SDR0_MFR,
149 0, SDR0_MFR_ECS >> dev->cell_index);
150 #endif
151 }
152
153 static inline void emac_rx_clk_default(struct emac_instance *dev)
154 {
155 #ifdef CONFIG_PPC_DCR_NATIVE
156 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
157 dcri_clrset(SDR0, SDR0_MFR,
158 SDR0_MFR_ECS >> dev->cell_index, 0);
159 #endif
160 }
161
162 /* PHY polling intervals */
163 #define PHY_POLL_LINK_ON HZ
164 #define PHY_POLL_LINK_OFF (HZ / 5)
165
166 /* Graceful stop timeouts in us.
167 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
168 */
169 #define STOP_TIMEOUT_10 1230
170 #define STOP_TIMEOUT_100 124
171 #define STOP_TIMEOUT_1000 13
172 #define STOP_TIMEOUT_1000_JUMBO 73
173
174 static unsigned char default_mcast_addr[] = {
175 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
176 };
177
178 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
179 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
180 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
181 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
182 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
183 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
184 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
185 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
186 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
187 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
188 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
189 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
190 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
191 "tx_bd_excessive_collisions", "tx_bd_late_collision",
192 "tx_bd_multple_collisions", "tx_bd_single_collision",
193 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
194 "tx_errors"
195 };
196
197 static irqreturn_t emac_irq(int irq, void *dev_instance);
198 static void emac_clean_tx_ring(struct emac_instance *dev);
199 static void __emac_set_multicast_list(struct emac_instance *dev);
200
201 static inline int emac_phy_supports_gige(int phy_mode)
202 {
203 return phy_mode == PHY_MODE_GMII ||
204 phy_mode == PHY_MODE_RGMII ||
205 phy_mode == PHY_MODE_SGMII ||
206 phy_mode == PHY_MODE_TBI ||
207 phy_mode == PHY_MODE_RTBI;
208 }
209
210 static inline int emac_phy_gpcs(int phy_mode)
211 {
212 return phy_mode == PHY_MODE_SGMII ||
213 phy_mode == PHY_MODE_TBI ||
214 phy_mode == PHY_MODE_RTBI;
215 }
216
217 static inline void emac_tx_enable(struct emac_instance *dev)
218 {
219 struct emac_regs __iomem *p = dev->emacp;
220 u32 r;
221
222 DBG(dev, "tx_enable" NL);
223
224 r = in_be32(&p->mr0);
225 if (!(r & EMAC_MR0_TXE))
226 out_be32(&p->mr0, r | EMAC_MR0_TXE);
227 }
228
229 static void emac_tx_disable(struct emac_instance *dev)
230 {
231 struct emac_regs __iomem *p = dev->emacp;
232 u32 r;
233
234 DBG(dev, "tx_disable" NL);
235
236 r = in_be32(&p->mr0);
237 if (r & EMAC_MR0_TXE) {
238 int n = dev->stop_timeout;
239 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
240 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
241 udelay(1);
242 --n;
243 }
244 if (unlikely(!n))
245 emac_report_timeout_error(dev, "TX disable timeout");
246 }
247 }
248
249 static void emac_rx_enable(struct emac_instance *dev)
250 {
251 struct emac_regs __iomem *p = dev->emacp;
252 u32 r;
253
254 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
255 goto out;
256
257 DBG(dev, "rx_enable" NL);
258
259 r = in_be32(&p->mr0);
260 if (!(r & EMAC_MR0_RXE)) {
261 if (unlikely(!(r & EMAC_MR0_RXI))) {
262 /* Wait if previous async disable is still in progress */
263 int n = dev->stop_timeout;
264 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
265 udelay(1);
266 --n;
267 }
268 if (unlikely(!n))
269 emac_report_timeout_error(dev,
270 "RX disable timeout");
271 }
272 out_be32(&p->mr0, r | EMAC_MR0_RXE);
273 }
274 out:
275 ;
276 }
277
278 static void emac_rx_disable(struct emac_instance *dev)
279 {
280 struct emac_regs __iomem *p = dev->emacp;
281 u32 r;
282
283 DBG(dev, "rx_disable" NL);
284
285 r = in_be32(&p->mr0);
286 if (r & EMAC_MR0_RXE) {
287 int n = dev->stop_timeout;
288 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
289 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
290 udelay(1);
291 --n;
292 }
293 if (unlikely(!n))
294 emac_report_timeout_error(dev, "RX disable timeout");
295 }
296 }
297
298 static inline void emac_netif_stop(struct emac_instance *dev)
299 {
300 netif_tx_lock_bh(dev->ndev);
301 netif_addr_lock(dev->ndev);
302 dev->no_mcast = 1;
303 netif_addr_unlock(dev->ndev);
304 netif_tx_unlock_bh(dev->ndev);
305 dev->ndev->trans_start = jiffies; /* prevent tx timeout */
306 mal_poll_disable(dev->mal, &dev->commac);
307 netif_tx_disable(dev->ndev);
308 }
309
310 static inline void emac_netif_start(struct emac_instance *dev)
311 {
312 netif_tx_lock_bh(dev->ndev);
313 netif_addr_lock(dev->ndev);
314 dev->no_mcast = 0;
315 if (dev->mcast_pending && netif_running(dev->ndev))
316 __emac_set_multicast_list(dev);
317 netif_addr_unlock(dev->ndev);
318 netif_tx_unlock_bh(dev->ndev);
319
320 netif_wake_queue(dev->ndev);
321
322 /* NOTE: unconditional netif_wake_queue is only appropriate
323 * so long as all callers are assured to have free tx slots
324 * (taken from tg3... though the case where that is wrong is
325 * not terribly harmful)
326 */
327 mal_poll_enable(dev->mal, &dev->commac);
328 }
329
330 static inline void emac_rx_disable_async(struct emac_instance *dev)
331 {
332 struct emac_regs __iomem *p = dev->emacp;
333 u32 r;
334
335 DBG(dev, "rx_disable_async" NL);
336
337 r = in_be32(&p->mr0);
338 if (r & EMAC_MR0_RXE)
339 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
340 }
341
342 static int emac_reset(struct emac_instance *dev)
343 {
344 struct emac_regs __iomem *p = dev->emacp;
345 int n = 20;
346
347 DBG(dev, "reset" NL);
348
349 if (!dev->reset_failed) {
350 /* 40x erratum suggests stopping RX channel before reset,
351 * we stop TX as well
352 */
353 emac_rx_disable(dev);
354 emac_tx_disable(dev);
355 }
356
357 #ifdef CONFIG_PPC_DCR_NATIVE
358 /* Enable internal clock source */
359 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
360 dcri_clrset(SDR0, SDR0_ETH_CFG,
361 0, SDR0_ETH_CFG_ECS << dev->cell_index);
362 #endif
363
364 out_be32(&p->mr0, EMAC_MR0_SRST);
365 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
366 --n;
367
368 #ifdef CONFIG_PPC_DCR_NATIVE
369 /* Enable external clock source */
370 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
371 dcri_clrset(SDR0, SDR0_ETH_CFG,
372 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
373 #endif
374
375 if (n) {
376 dev->reset_failed = 0;
377 return 0;
378 } else {
379 emac_report_timeout_error(dev, "reset timeout");
380 dev->reset_failed = 1;
381 return -ETIMEDOUT;
382 }
383 }
384
385 static void emac_hash_mc(struct emac_instance *dev)
386 {
387 const int regs = EMAC_XAHT_REGS(dev);
388 u32 *gaht_base = emac_gaht_base(dev);
389 u32 gaht_temp[regs];
390 struct dev_mc_list *dmi;
391 int i;
392
393 DBG(dev, "hash_mc %d" NL, dev->ndev->mc_count);
394
395 memset(gaht_temp, 0, sizeof (gaht_temp));
396
397 for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) {
398 int slot, reg, mask;
399 DBG2(dev, "mc %02x:%02x:%02x:%02x:%02x:%02x" NL,
400 dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2],
401 dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]);
402
403 slot = EMAC_XAHT_CRC_TO_SLOT(dev, ether_crc(ETH_ALEN, dmi->dmi_addr));
404 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
405 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
406
407 gaht_temp[reg] |= mask;
408 }
409
410 for (i = 0; i < regs; i++)
411 out_be32(gaht_base + i, gaht_temp[i]);
412 }
413
414 static inline u32 emac_iff2rmr(struct net_device *ndev)
415 {
416 struct emac_instance *dev = netdev_priv(ndev);
417 u32 r;
418
419 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
420
421 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
422 r |= EMAC4_RMR_BASE;
423 else
424 r |= EMAC_RMR_BASE;
425
426 if (ndev->flags & IFF_PROMISC)
427 r |= EMAC_RMR_PME;
428 else if (ndev->flags & IFF_ALLMULTI ||
429 (ndev->mc_count > EMAC_XAHT_SLOTS(dev)))
430 r |= EMAC_RMR_PMME;
431 else if (ndev->mc_count > 0)
432 r |= EMAC_RMR_MAE;
433
434 return r;
435 }
436
437 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
438 {
439 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
440
441 DBG2(dev, "__emac_calc_base_mr1" NL);
442
443 switch(tx_size) {
444 case 2048:
445 ret |= EMAC_MR1_TFS_2K;
446 break;
447 default:
448 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
449 dev->ndev->name, tx_size);
450 }
451
452 switch(rx_size) {
453 case 16384:
454 ret |= EMAC_MR1_RFS_16K;
455 break;
456 case 4096:
457 ret |= EMAC_MR1_RFS_4K;
458 break;
459 default:
460 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
461 dev->ndev->name, rx_size);
462 }
463
464 return ret;
465 }
466
467 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
468 {
469 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
470 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
471
472 DBG2(dev, "__emac4_calc_base_mr1" NL);
473
474 switch(tx_size) {
475 case 4096:
476 ret |= EMAC4_MR1_TFS_4K;
477 break;
478 case 2048:
479 ret |= EMAC4_MR1_TFS_2K;
480 break;
481 default:
482 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
483 dev->ndev->name, tx_size);
484 }
485
486 switch(rx_size) {
487 case 16384:
488 ret |= EMAC4_MR1_RFS_16K;
489 break;
490 case 4096:
491 ret |= EMAC4_MR1_RFS_4K;
492 break;
493 case 2048:
494 ret |= EMAC4_MR1_RFS_2K;
495 break;
496 default:
497 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
498 dev->ndev->name, rx_size);
499 }
500
501 return ret;
502 }
503
504 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
505 {
506 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
507 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
508 __emac_calc_base_mr1(dev, tx_size, rx_size);
509 }
510
511 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
512 {
513 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
514 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
515 else
516 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
517 }
518
519 static inline u32 emac_calc_rwmr(struct emac_instance *dev,
520 unsigned int low, unsigned int high)
521 {
522 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
523 return (low << 22) | ( (high & 0x3ff) << 6);
524 else
525 return (low << 23) | ( (high & 0x1ff) << 7);
526 }
527
528 static int emac_configure(struct emac_instance *dev)
529 {
530 struct emac_regs __iomem *p = dev->emacp;
531 struct net_device *ndev = dev->ndev;
532 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
533 u32 r, mr1 = 0;
534
535 DBG(dev, "configure" NL);
536
537 if (!link) {
538 out_be32(&p->mr1, in_be32(&p->mr1)
539 | EMAC_MR1_FDE | EMAC_MR1_ILE);
540 udelay(100);
541 } else if (emac_reset(dev) < 0)
542 return -ETIMEDOUT;
543
544 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
545 tah_reset(dev->tah_dev);
546
547 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
548 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
549
550 /* Default fifo sizes */
551 tx_size = dev->tx_fifo_size;
552 rx_size = dev->rx_fifo_size;
553
554 /* No link, force loopback */
555 if (!link)
556 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
557
558 /* Check for full duplex */
559 else if (dev->phy.duplex == DUPLEX_FULL)
560 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
561
562 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
563 dev->stop_timeout = STOP_TIMEOUT_10;
564 switch (dev->phy.speed) {
565 case SPEED_1000:
566 if (emac_phy_gpcs(dev->phy.mode)) {
567 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
568 (dev->phy.gpcs_address != 0xffffffff) ?
569 dev->phy.gpcs_address : dev->phy.address);
570
571 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
572 * identify this GPCS PHY later.
573 */
574 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
575 } else
576 mr1 |= EMAC_MR1_MF_1000;
577
578 /* Extended fifo sizes */
579 tx_size = dev->tx_fifo_size_gige;
580 rx_size = dev->rx_fifo_size_gige;
581
582 if (dev->ndev->mtu > ETH_DATA_LEN) {
583 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
584 mr1 |= EMAC4_MR1_JPSM;
585 else
586 mr1 |= EMAC_MR1_JPSM;
587 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
588 } else
589 dev->stop_timeout = STOP_TIMEOUT_1000;
590 break;
591 case SPEED_100:
592 mr1 |= EMAC_MR1_MF_100;
593 dev->stop_timeout = STOP_TIMEOUT_100;
594 break;
595 default: /* make gcc happy */
596 break;
597 }
598
599 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
600 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
601 dev->phy.speed);
602 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
603 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
604
605 /* on 40x erratum forces us to NOT use integrated flow control,
606 * let's hope it works on 44x ;)
607 */
608 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
609 dev->phy.duplex == DUPLEX_FULL) {
610 if (dev->phy.pause)
611 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
612 else if (dev->phy.asym_pause)
613 mr1 |= EMAC_MR1_APP;
614 }
615
616 /* Add base settings & fifo sizes & program MR1 */
617 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
618 out_be32(&p->mr1, mr1);
619
620 /* Set individual MAC address */
621 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
622 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
623 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
624 ndev->dev_addr[5]);
625
626 /* VLAN Tag Protocol ID */
627 out_be32(&p->vtpid, 0x8100);
628
629 /* Receive mode register */
630 r = emac_iff2rmr(ndev);
631 if (r & EMAC_RMR_MAE)
632 emac_hash_mc(dev);
633 out_be32(&p->rmr, r);
634
635 /* FIFOs thresholds */
636 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
637 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
638 tx_size / 2 / dev->fifo_entry_size);
639 else
640 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
641 tx_size / 2 / dev->fifo_entry_size);
642 out_be32(&p->tmr1, r);
643 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
644
645 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
646 there should be still enough space in FIFO to allow the our link
647 partner time to process this frame and also time to send PAUSE
648 frame itself.
649
650 Here is the worst case scenario for the RX FIFO "headroom"
651 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
652
653 1) One maximum-length frame on TX 1522 bytes
654 2) One PAUSE frame time 64 bytes
655 3) PAUSE frame decode time allowance 64 bytes
656 4) One maximum-length frame on RX 1522 bytes
657 5) Round-trip propagation delay of the link (100Mb) 15 bytes
658 ----------
659 3187 bytes
660
661 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
662 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
663 */
664 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
665 rx_size / 4 / dev->fifo_entry_size);
666 out_be32(&p->rwmr, r);
667
668 /* Set PAUSE timer to the maximum */
669 out_be32(&p->ptr, 0xffff);
670
671 /* IRQ sources */
672 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
673 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
674 EMAC_ISR_IRE | EMAC_ISR_TE;
675 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
676 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
677 EMAC4_ISR_RXOE | */;
678 out_be32(&p->iser, r);
679
680 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
681 if (emac_phy_gpcs(dev->phy.mode)) {
682 if (dev->phy.gpcs_address != 0xffffffff)
683 emac_mii_reset_gpcs(&dev->phy);
684 else
685 emac_mii_reset_phy(&dev->phy);
686 }
687
688 return 0;
689 }
690
691 static void emac_reinitialize(struct emac_instance *dev)
692 {
693 DBG(dev, "reinitialize" NL);
694
695 emac_netif_stop(dev);
696 if (!emac_configure(dev)) {
697 emac_tx_enable(dev);
698 emac_rx_enable(dev);
699 }
700 emac_netif_start(dev);
701 }
702
703 static void emac_full_tx_reset(struct emac_instance *dev)
704 {
705 DBG(dev, "full_tx_reset" NL);
706
707 emac_tx_disable(dev);
708 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
709 emac_clean_tx_ring(dev);
710 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
711
712 emac_configure(dev);
713
714 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
715 emac_tx_enable(dev);
716 emac_rx_enable(dev);
717 }
718
719 static void emac_reset_work(struct work_struct *work)
720 {
721 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
722
723 DBG(dev, "reset_work" NL);
724
725 mutex_lock(&dev->link_lock);
726 if (dev->opened) {
727 emac_netif_stop(dev);
728 emac_full_tx_reset(dev);
729 emac_netif_start(dev);
730 }
731 mutex_unlock(&dev->link_lock);
732 }
733
734 static void emac_tx_timeout(struct net_device *ndev)
735 {
736 struct emac_instance *dev = netdev_priv(ndev);
737
738 DBG(dev, "tx_timeout" NL);
739
740 schedule_work(&dev->reset_work);
741 }
742
743
744 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
745 {
746 int done = !!(stacr & EMAC_STACR_OC);
747
748 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
749 done = !done;
750
751 return done;
752 };
753
754 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
755 {
756 struct emac_regs __iomem *p = dev->emacp;
757 u32 r = 0;
758 int n, err = -ETIMEDOUT;
759
760 mutex_lock(&dev->mdio_lock);
761
762 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
763
764 /* Enable proper MDIO port */
765 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
766 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
767 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
768 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
769
770 /* Wait for management interface to become idle */
771 n = 20;
772 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
773 udelay(1);
774 if (!--n) {
775 DBG2(dev, " -> timeout wait idle\n");
776 goto bail;
777 }
778 }
779
780 /* Issue read command */
781 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
782 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
783 else
784 r = EMAC_STACR_BASE(dev->opb_bus_freq);
785 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
786 r |= EMAC_STACR_OC;
787 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
788 r |= EMACX_STACR_STAC_READ;
789 else
790 r |= EMAC_STACR_STAC_READ;
791 r |= (reg & EMAC_STACR_PRA_MASK)
792 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
793 out_be32(&p->stacr, r);
794
795 /* Wait for read to complete */
796 n = 200;
797 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
798 udelay(1);
799 if (!--n) {
800 DBG2(dev, " -> timeout wait complete\n");
801 goto bail;
802 }
803 }
804
805 if (unlikely(r & EMAC_STACR_PHYE)) {
806 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
807 err = -EREMOTEIO;
808 goto bail;
809 }
810
811 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
812
813 DBG2(dev, "mdio_read -> %04x" NL, r);
814 err = 0;
815 bail:
816 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
817 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
818 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
819 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
820 mutex_unlock(&dev->mdio_lock);
821
822 return err == 0 ? r : err;
823 }
824
825 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
826 u16 val)
827 {
828 struct emac_regs __iomem *p = dev->emacp;
829 u32 r = 0;
830 int n, err = -ETIMEDOUT;
831
832 mutex_lock(&dev->mdio_lock);
833
834 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
835
836 /* Enable proper MDIO port */
837 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
838 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
839 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
840 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
841
842 /* Wait for management interface to be idle */
843 n = 20;
844 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
845 udelay(1);
846 if (!--n) {
847 DBG2(dev, " -> timeout wait idle\n");
848 goto bail;
849 }
850 }
851
852 /* Issue write command */
853 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
854 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
855 else
856 r = EMAC_STACR_BASE(dev->opb_bus_freq);
857 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
858 r |= EMAC_STACR_OC;
859 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
860 r |= EMACX_STACR_STAC_WRITE;
861 else
862 r |= EMAC_STACR_STAC_WRITE;
863 r |= (reg & EMAC_STACR_PRA_MASK) |
864 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
865 (val << EMAC_STACR_PHYD_SHIFT);
866 out_be32(&p->stacr, r);
867
868 /* Wait for write to complete */
869 n = 200;
870 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
871 udelay(1);
872 if (!--n) {
873 DBG2(dev, " -> timeout wait complete\n");
874 goto bail;
875 }
876 }
877 err = 0;
878 bail:
879 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
880 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
881 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
882 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
883 mutex_unlock(&dev->mdio_lock);
884 }
885
886 static int emac_mdio_read(struct net_device *ndev, int id, int reg)
887 {
888 struct emac_instance *dev = netdev_priv(ndev);
889 int res;
890
891 res = __emac_mdio_read((dev->mdio_instance &&
892 dev->phy.gpcs_address != id) ?
893 dev->mdio_instance : dev,
894 (u8) id, (u8) reg);
895 return res;
896 }
897
898 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
899 {
900 struct emac_instance *dev = netdev_priv(ndev);
901
902 __emac_mdio_write((dev->mdio_instance &&
903 dev->phy.gpcs_address != id) ?
904 dev->mdio_instance : dev,
905 (u8) id, (u8) reg, (u16) val);
906 }
907
908 /* Tx lock BH */
909 static void __emac_set_multicast_list(struct emac_instance *dev)
910 {
911 struct emac_regs __iomem *p = dev->emacp;
912 u32 rmr = emac_iff2rmr(dev->ndev);
913
914 DBG(dev, "__multicast %08x" NL, rmr);
915
916 /* I decided to relax register access rules here to avoid
917 * full EMAC reset.
918 *
919 * There is a real problem with EMAC4 core if we use MWSW_001 bit
920 * in MR1 register and do a full EMAC reset.
921 * One TX BD status update is delayed and, after EMAC reset, it
922 * never happens, resulting in TX hung (it'll be recovered by TX
923 * timeout handler eventually, but this is just gross).
924 * So we either have to do full TX reset or try to cheat here :)
925 *
926 * The only required change is to RX mode register, so I *think* all
927 * we need is just to stop RX channel. This seems to work on all
928 * tested SoCs. --ebs
929 *
930 * If we need the full reset, we might just trigger the workqueue
931 * and do it async... a bit nasty but should work --BenH
932 */
933 dev->mcast_pending = 0;
934 emac_rx_disable(dev);
935 if (rmr & EMAC_RMR_MAE)
936 emac_hash_mc(dev);
937 out_be32(&p->rmr, rmr);
938 emac_rx_enable(dev);
939 }
940
941 /* Tx lock BH */
942 static void emac_set_multicast_list(struct net_device *ndev)
943 {
944 struct emac_instance *dev = netdev_priv(ndev);
945
946 DBG(dev, "multicast" NL);
947
948 BUG_ON(!netif_running(dev->ndev));
949
950 if (dev->no_mcast) {
951 dev->mcast_pending = 1;
952 return;
953 }
954 __emac_set_multicast_list(dev);
955 }
956
957 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
958 {
959 int rx_sync_size = emac_rx_sync_size(new_mtu);
960 int rx_skb_size = emac_rx_skb_size(new_mtu);
961 int i, ret = 0;
962
963 mutex_lock(&dev->link_lock);
964 emac_netif_stop(dev);
965 emac_rx_disable(dev);
966 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
967
968 if (dev->rx_sg_skb) {
969 ++dev->estats.rx_dropped_resize;
970 dev_kfree_skb(dev->rx_sg_skb);
971 dev->rx_sg_skb = NULL;
972 }
973
974 /* Make a first pass over RX ring and mark BDs ready, dropping
975 * non-processed packets on the way. We need this as a separate pass
976 * to simplify error recovery in the case of allocation failure later.
977 */
978 for (i = 0; i < NUM_RX_BUFF; ++i) {
979 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
980 ++dev->estats.rx_dropped_resize;
981
982 dev->rx_desc[i].data_len = 0;
983 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
984 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
985 }
986
987 /* Reallocate RX ring only if bigger skb buffers are required */
988 if (rx_skb_size <= dev->rx_skb_size)
989 goto skip;
990
991 /* Second pass, allocate new skbs */
992 for (i = 0; i < NUM_RX_BUFF; ++i) {
993 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
994 if (!skb) {
995 ret = -ENOMEM;
996 goto oom;
997 }
998
999 BUG_ON(!dev->rx_skb[i]);
1000 dev_kfree_skb(dev->rx_skb[i]);
1001
1002 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1003 dev->rx_desc[i].data_ptr =
1004 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1005 DMA_FROM_DEVICE) + 2;
1006 dev->rx_skb[i] = skb;
1007 }
1008 skip:
1009 /* Check if we need to change "Jumbo" bit in MR1 */
1010 if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) {
1011 /* This is to prevent starting RX channel in emac_rx_enable() */
1012 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1013
1014 dev->ndev->mtu = new_mtu;
1015 emac_full_tx_reset(dev);
1016 }
1017
1018 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1019 oom:
1020 /* Restart RX */
1021 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1022 dev->rx_slot = 0;
1023 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1024 emac_rx_enable(dev);
1025 emac_netif_start(dev);
1026 mutex_unlock(&dev->link_lock);
1027
1028 return ret;
1029 }
1030
1031 /* Process ctx, rtnl_lock semaphore */
1032 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1033 {
1034 struct emac_instance *dev = netdev_priv(ndev);
1035 int ret = 0;
1036
1037 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1038 return -EINVAL;
1039
1040 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1041
1042 if (netif_running(ndev)) {
1043 /* Check if we really need to reinitalize RX ring */
1044 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1045 ret = emac_resize_rx_ring(dev, new_mtu);
1046 }
1047
1048 if (!ret) {
1049 ndev->mtu = new_mtu;
1050 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1051 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1052 }
1053
1054 return ret;
1055 }
1056
1057 static void emac_clean_tx_ring(struct emac_instance *dev)
1058 {
1059 int i;
1060
1061 for (i = 0; i < NUM_TX_BUFF; ++i) {
1062 if (dev->tx_skb[i]) {
1063 dev_kfree_skb(dev->tx_skb[i]);
1064 dev->tx_skb[i] = NULL;
1065 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1066 ++dev->estats.tx_dropped;
1067 }
1068 dev->tx_desc[i].ctrl = 0;
1069 dev->tx_desc[i].data_ptr = 0;
1070 }
1071 }
1072
1073 static void emac_clean_rx_ring(struct emac_instance *dev)
1074 {
1075 int i;
1076
1077 for (i = 0; i < NUM_RX_BUFF; ++i)
1078 if (dev->rx_skb[i]) {
1079 dev->rx_desc[i].ctrl = 0;
1080 dev_kfree_skb(dev->rx_skb[i]);
1081 dev->rx_skb[i] = NULL;
1082 dev->rx_desc[i].data_ptr = 0;
1083 }
1084
1085 if (dev->rx_sg_skb) {
1086 dev_kfree_skb(dev->rx_sg_skb);
1087 dev->rx_sg_skb = NULL;
1088 }
1089 }
1090
1091 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1092 gfp_t flags)
1093 {
1094 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1095 if (unlikely(!skb))
1096 return -ENOMEM;
1097
1098 dev->rx_skb[slot] = skb;
1099 dev->rx_desc[slot].data_len = 0;
1100
1101 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1102 dev->rx_desc[slot].data_ptr =
1103 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1104 DMA_FROM_DEVICE) + 2;
1105 wmb();
1106 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1107 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1108
1109 return 0;
1110 }
1111
1112 static void emac_print_link_status(struct emac_instance *dev)
1113 {
1114 if (netif_carrier_ok(dev->ndev))
1115 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1116 dev->ndev->name, dev->phy.speed,
1117 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1118 dev->phy.pause ? ", pause enabled" :
1119 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1120 else
1121 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1122 }
1123
1124 /* Process ctx, rtnl_lock semaphore */
1125 static int emac_open(struct net_device *ndev)
1126 {
1127 struct emac_instance *dev = netdev_priv(ndev);
1128 int err, i;
1129
1130 DBG(dev, "open" NL);
1131
1132 /* Setup error IRQ handler */
1133 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1134 if (err) {
1135 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1136 ndev->name, dev->emac_irq);
1137 return err;
1138 }
1139
1140 /* Allocate RX ring */
1141 for (i = 0; i < NUM_RX_BUFF; ++i)
1142 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1143 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1144 ndev->name);
1145 goto oom;
1146 }
1147
1148 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1149 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1150 dev->rx_sg_skb = NULL;
1151
1152 mutex_lock(&dev->link_lock);
1153 dev->opened = 1;
1154
1155 /* Start PHY polling now.
1156 */
1157 if (dev->phy.address >= 0) {
1158 int link_poll_interval;
1159 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1160 dev->phy.def->ops->read_link(&dev->phy);
1161 emac_rx_clk_default(dev);
1162 netif_carrier_on(dev->ndev);
1163 link_poll_interval = PHY_POLL_LINK_ON;
1164 } else {
1165 emac_rx_clk_tx(dev);
1166 netif_carrier_off(dev->ndev);
1167 link_poll_interval = PHY_POLL_LINK_OFF;
1168 }
1169 dev->link_polling = 1;
1170 wmb();
1171 schedule_delayed_work(&dev->link_work, link_poll_interval);
1172 emac_print_link_status(dev);
1173 } else
1174 netif_carrier_on(dev->ndev);
1175
1176 /* Required for Pause packet support in EMAC */
1177 dev_mc_add(ndev, default_mcast_addr, sizeof(default_mcast_addr), 1);
1178
1179 emac_configure(dev);
1180 mal_poll_add(dev->mal, &dev->commac);
1181 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1182 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1183 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1184 emac_tx_enable(dev);
1185 emac_rx_enable(dev);
1186 emac_netif_start(dev);
1187
1188 mutex_unlock(&dev->link_lock);
1189
1190 return 0;
1191 oom:
1192 emac_clean_rx_ring(dev);
1193 free_irq(dev->emac_irq, dev);
1194
1195 return -ENOMEM;
1196 }
1197
1198 /* BHs disabled */
1199 #if 0
1200 static int emac_link_differs(struct emac_instance *dev)
1201 {
1202 u32 r = in_be32(&dev->emacp->mr1);
1203
1204 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1205 int speed, pause, asym_pause;
1206
1207 if (r & EMAC_MR1_MF_1000)
1208 speed = SPEED_1000;
1209 else if (r & EMAC_MR1_MF_100)
1210 speed = SPEED_100;
1211 else
1212 speed = SPEED_10;
1213
1214 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1215 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1216 pause = 1;
1217 asym_pause = 0;
1218 break;
1219 case EMAC_MR1_APP:
1220 pause = 0;
1221 asym_pause = 1;
1222 break;
1223 default:
1224 pause = asym_pause = 0;
1225 }
1226 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1227 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1228 }
1229 #endif
1230
1231 static void emac_link_timer(struct work_struct *work)
1232 {
1233 struct emac_instance *dev =
1234 container_of((struct delayed_work *)work,
1235 struct emac_instance, link_work);
1236 int link_poll_interval;
1237
1238 mutex_lock(&dev->link_lock);
1239 DBG2(dev, "link timer" NL);
1240
1241 if (!dev->opened)
1242 goto bail;
1243
1244 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1245 if (!netif_carrier_ok(dev->ndev)) {
1246 emac_rx_clk_default(dev);
1247 /* Get new link parameters */
1248 dev->phy.def->ops->read_link(&dev->phy);
1249
1250 netif_carrier_on(dev->ndev);
1251 emac_netif_stop(dev);
1252 emac_full_tx_reset(dev);
1253 emac_netif_start(dev);
1254 emac_print_link_status(dev);
1255 }
1256 link_poll_interval = PHY_POLL_LINK_ON;
1257 } else {
1258 if (netif_carrier_ok(dev->ndev)) {
1259 emac_rx_clk_tx(dev);
1260 netif_carrier_off(dev->ndev);
1261 netif_tx_disable(dev->ndev);
1262 emac_reinitialize(dev);
1263 emac_print_link_status(dev);
1264 }
1265 link_poll_interval = PHY_POLL_LINK_OFF;
1266 }
1267 schedule_delayed_work(&dev->link_work, link_poll_interval);
1268 bail:
1269 mutex_unlock(&dev->link_lock);
1270 }
1271
1272 static void emac_force_link_update(struct emac_instance *dev)
1273 {
1274 netif_carrier_off(dev->ndev);
1275 smp_rmb();
1276 if (dev->link_polling) {
1277 cancel_rearming_delayed_work(&dev->link_work);
1278 if (dev->link_polling)
1279 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1280 }
1281 }
1282
1283 /* Process ctx, rtnl_lock semaphore */
1284 static int emac_close(struct net_device *ndev)
1285 {
1286 struct emac_instance *dev = netdev_priv(ndev);
1287
1288 DBG(dev, "close" NL);
1289
1290 if (dev->phy.address >= 0) {
1291 dev->link_polling = 0;
1292 cancel_rearming_delayed_work(&dev->link_work);
1293 }
1294 mutex_lock(&dev->link_lock);
1295 emac_netif_stop(dev);
1296 dev->opened = 0;
1297 mutex_unlock(&dev->link_lock);
1298
1299 emac_rx_disable(dev);
1300 emac_tx_disable(dev);
1301 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1302 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1303 mal_poll_del(dev->mal, &dev->commac);
1304
1305 emac_clean_tx_ring(dev);
1306 emac_clean_rx_ring(dev);
1307
1308 free_irq(dev->emac_irq, dev);
1309
1310 return 0;
1311 }
1312
1313 static inline u16 emac_tx_csum(struct emac_instance *dev,
1314 struct sk_buff *skb)
1315 {
1316 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1317 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1318 ++dev->stats.tx_packets_csum;
1319 return EMAC_TX_CTRL_TAH_CSUM;
1320 }
1321 return 0;
1322 }
1323
1324 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1325 {
1326 struct emac_regs __iomem *p = dev->emacp;
1327 struct net_device *ndev = dev->ndev;
1328
1329 /* Send the packet out. If the if makes a significant perf
1330 * difference, then we can store the TMR0 value in "dev"
1331 * instead
1332 */
1333 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1334 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1335 else
1336 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1337
1338 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1339 netif_stop_queue(ndev);
1340 DBG2(dev, "stopped TX queue" NL);
1341 }
1342
1343 ndev->trans_start = jiffies;
1344 ++dev->stats.tx_packets;
1345 dev->stats.tx_bytes += len;
1346
1347 return 0;
1348 }
1349
1350 /* Tx lock BH */
1351 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1352 {
1353 struct emac_instance *dev = netdev_priv(ndev);
1354 unsigned int len = skb->len;
1355 int slot;
1356
1357 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1358 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1359
1360 slot = dev->tx_slot++;
1361 if (dev->tx_slot == NUM_TX_BUFF) {
1362 dev->tx_slot = 0;
1363 ctrl |= MAL_TX_CTRL_WRAP;
1364 }
1365
1366 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1367
1368 dev->tx_skb[slot] = skb;
1369 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1370 skb->data, len,
1371 DMA_TO_DEVICE);
1372 dev->tx_desc[slot].data_len = (u16) len;
1373 wmb();
1374 dev->tx_desc[slot].ctrl = ctrl;
1375
1376 return emac_xmit_finish(dev, len);
1377 }
1378
1379 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1380 u32 pd, int len, int last, u16 base_ctrl)
1381 {
1382 while (1) {
1383 u16 ctrl = base_ctrl;
1384 int chunk = min(len, MAL_MAX_TX_SIZE);
1385 len -= chunk;
1386
1387 slot = (slot + 1) % NUM_TX_BUFF;
1388
1389 if (last && !len)
1390 ctrl |= MAL_TX_CTRL_LAST;
1391 if (slot == NUM_TX_BUFF - 1)
1392 ctrl |= MAL_TX_CTRL_WRAP;
1393
1394 dev->tx_skb[slot] = NULL;
1395 dev->tx_desc[slot].data_ptr = pd;
1396 dev->tx_desc[slot].data_len = (u16) chunk;
1397 dev->tx_desc[slot].ctrl = ctrl;
1398 ++dev->tx_cnt;
1399
1400 if (!len)
1401 break;
1402
1403 pd += chunk;
1404 }
1405 return slot;
1406 }
1407
1408 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1409 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1410 {
1411 struct emac_instance *dev = netdev_priv(ndev);
1412 int nr_frags = skb_shinfo(skb)->nr_frags;
1413 int len = skb->len, chunk;
1414 int slot, i;
1415 u16 ctrl;
1416 u32 pd;
1417
1418 /* This is common "fast" path */
1419 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1420 return emac_start_xmit(skb, ndev);
1421
1422 len -= skb->data_len;
1423
1424 /* Note, this is only an *estimation*, we can still run out of empty
1425 * slots because of the additional fragmentation into
1426 * MAL_MAX_TX_SIZE-sized chunks
1427 */
1428 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1429 goto stop_queue;
1430
1431 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1432 emac_tx_csum(dev, skb);
1433 slot = dev->tx_slot;
1434
1435 /* skb data */
1436 dev->tx_skb[slot] = NULL;
1437 chunk = min(len, MAL_MAX_TX_SIZE);
1438 dev->tx_desc[slot].data_ptr = pd =
1439 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1440 dev->tx_desc[slot].data_len = (u16) chunk;
1441 len -= chunk;
1442 if (unlikely(len))
1443 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1444 ctrl);
1445 /* skb fragments */
1446 for (i = 0; i < nr_frags; ++i) {
1447 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1448 len = frag->size;
1449
1450 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1451 goto undo_frame;
1452
1453 pd = dma_map_page(&dev->ofdev->dev, frag->page, frag->page_offset, len,
1454 DMA_TO_DEVICE);
1455
1456 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1457 ctrl);
1458 }
1459
1460 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1461
1462 /* Attach skb to the last slot so we don't release it too early */
1463 dev->tx_skb[slot] = skb;
1464
1465 /* Send the packet out */
1466 if (dev->tx_slot == NUM_TX_BUFF - 1)
1467 ctrl |= MAL_TX_CTRL_WRAP;
1468 wmb();
1469 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1470 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1471
1472 return emac_xmit_finish(dev, skb->len);
1473
1474 undo_frame:
1475 /* Well, too bad. Our previous estimation was overly optimistic.
1476 * Undo everything.
1477 */
1478 while (slot != dev->tx_slot) {
1479 dev->tx_desc[slot].ctrl = 0;
1480 --dev->tx_cnt;
1481 if (--slot < 0)
1482 slot = NUM_TX_BUFF - 1;
1483 }
1484 ++dev->estats.tx_undo;
1485
1486 stop_queue:
1487 netif_stop_queue(ndev);
1488 DBG2(dev, "stopped TX queue" NL);
1489 return 1;
1490 }
1491
1492 /* Tx lock BHs */
1493 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1494 {
1495 struct emac_error_stats *st = &dev->estats;
1496
1497 DBG(dev, "BD TX error %04x" NL, ctrl);
1498
1499 ++st->tx_bd_errors;
1500 if (ctrl & EMAC_TX_ST_BFCS)
1501 ++st->tx_bd_bad_fcs;
1502 if (ctrl & EMAC_TX_ST_LCS)
1503 ++st->tx_bd_carrier_loss;
1504 if (ctrl & EMAC_TX_ST_ED)
1505 ++st->tx_bd_excessive_deferral;
1506 if (ctrl & EMAC_TX_ST_EC)
1507 ++st->tx_bd_excessive_collisions;
1508 if (ctrl & EMAC_TX_ST_LC)
1509 ++st->tx_bd_late_collision;
1510 if (ctrl & EMAC_TX_ST_MC)
1511 ++st->tx_bd_multple_collisions;
1512 if (ctrl & EMAC_TX_ST_SC)
1513 ++st->tx_bd_single_collision;
1514 if (ctrl & EMAC_TX_ST_UR)
1515 ++st->tx_bd_underrun;
1516 if (ctrl & EMAC_TX_ST_SQE)
1517 ++st->tx_bd_sqe;
1518 }
1519
1520 static void emac_poll_tx(void *param)
1521 {
1522 struct emac_instance *dev = param;
1523 u32 bad_mask;
1524
1525 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1526
1527 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1528 bad_mask = EMAC_IS_BAD_TX_TAH;
1529 else
1530 bad_mask = EMAC_IS_BAD_TX;
1531
1532 netif_tx_lock_bh(dev->ndev);
1533 if (dev->tx_cnt) {
1534 u16 ctrl;
1535 int slot = dev->ack_slot, n = 0;
1536 again:
1537 ctrl = dev->tx_desc[slot].ctrl;
1538 if (!(ctrl & MAL_TX_CTRL_READY)) {
1539 struct sk_buff *skb = dev->tx_skb[slot];
1540 ++n;
1541
1542 if (skb) {
1543 dev_kfree_skb(skb);
1544 dev->tx_skb[slot] = NULL;
1545 }
1546 slot = (slot + 1) % NUM_TX_BUFF;
1547
1548 if (unlikely(ctrl & bad_mask))
1549 emac_parse_tx_error(dev, ctrl);
1550
1551 if (--dev->tx_cnt)
1552 goto again;
1553 }
1554 if (n) {
1555 dev->ack_slot = slot;
1556 if (netif_queue_stopped(dev->ndev) &&
1557 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1558 netif_wake_queue(dev->ndev);
1559
1560 DBG2(dev, "tx %d pkts" NL, n);
1561 }
1562 }
1563 netif_tx_unlock_bh(dev->ndev);
1564 }
1565
1566 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1567 int len)
1568 {
1569 struct sk_buff *skb = dev->rx_skb[slot];
1570
1571 DBG2(dev, "recycle %d %d" NL, slot, len);
1572
1573 if (len)
1574 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1575 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1576
1577 dev->rx_desc[slot].data_len = 0;
1578 wmb();
1579 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1580 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1581 }
1582
1583 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1584 {
1585 struct emac_error_stats *st = &dev->estats;
1586
1587 DBG(dev, "BD RX error %04x" NL, ctrl);
1588
1589 ++st->rx_bd_errors;
1590 if (ctrl & EMAC_RX_ST_OE)
1591 ++st->rx_bd_overrun;
1592 if (ctrl & EMAC_RX_ST_BP)
1593 ++st->rx_bd_bad_packet;
1594 if (ctrl & EMAC_RX_ST_RP)
1595 ++st->rx_bd_runt_packet;
1596 if (ctrl & EMAC_RX_ST_SE)
1597 ++st->rx_bd_short_event;
1598 if (ctrl & EMAC_RX_ST_AE)
1599 ++st->rx_bd_alignment_error;
1600 if (ctrl & EMAC_RX_ST_BFCS)
1601 ++st->rx_bd_bad_fcs;
1602 if (ctrl & EMAC_RX_ST_PTL)
1603 ++st->rx_bd_packet_too_long;
1604 if (ctrl & EMAC_RX_ST_ORE)
1605 ++st->rx_bd_out_of_range;
1606 if (ctrl & EMAC_RX_ST_IRE)
1607 ++st->rx_bd_in_range;
1608 }
1609
1610 static inline void emac_rx_csum(struct emac_instance *dev,
1611 struct sk_buff *skb, u16 ctrl)
1612 {
1613 #ifdef CONFIG_IBM_NEW_EMAC_TAH
1614 if (!ctrl && dev->tah_dev) {
1615 skb->ip_summed = CHECKSUM_UNNECESSARY;
1616 ++dev->stats.rx_packets_csum;
1617 }
1618 #endif
1619 }
1620
1621 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1622 {
1623 if (likely(dev->rx_sg_skb != NULL)) {
1624 int len = dev->rx_desc[slot].data_len;
1625 int tot_len = dev->rx_sg_skb->len + len;
1626
1627 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1628 ++dev->estats.rx_dropped_mtu;
1629 dev_kfree_skb(dev->rx_sg_skb);
1630 dev->rx_sg_skb = NULL;
1631 } else {
1632 cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
1633 dev->rx_skb[slot]->data, len);
1634 skb_put(dev->rx_sg_skb, len);
1635 emac_recycle_rx_skb(dev, slot, len);
1636 return 0;
1637 }
1638 }
1639 emac_recycle_rx_skb(dev, slot, 0);
1640 return -1;
1641 }
1642
1643 /* NAPI poll context */
1644 static int emac_poll_rx(void *param, int budget)
1645 {
1646 struct emac_instance *dev = param;
1647 int slot = dev->rx_slot, received = 0;
1648
1649 DBG2(dev, "poll_rx(%d)" NL, budget);
1650
1651 again:
1652 while (budget > 0) {
1653 int len;
1654 struct sk_buff *skb;
1655 u16 ctrl = dev->rx_desc[slot].ctrl;
1656
1657 if (ctrl & MAL_RX_CTRL_EMPTY)
1658 break;
1659
1660 skb = dev->rx_skb[slot];
1661 mb();
1662 len = dev->rx_desc[slot].data_len;
1663
1664 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1665 goto sg;
1666
1667 ctrl &= EMAC_BAD_RX_MASK;
1668 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1669 emac_parse_rx_error(dev, ctrl);
1670 ++dev->estats.rx_dropped_error;
1671 emac_recycle_rx_skb(dev, slot, 0);
1672 len = 0;
1673 goto next;
1674 }
1675
1676 if (len < ETH_HLEN) {
1677 ++dev->estats.rx_dropped_stack;
1678 emac_recycle_rx_skb(dev, slot, len);
1679 goto next;
1680 }
1681
1682 if (len && len < EMAC_RX_COPY_THRESH) {
1683 struct sk_buff *copy_skb =
1684 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1685 if (unlikely(!copy_skb))
1686 goto oom;
1687
1688 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1689 cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
1690 len + 2);
1691 emac_recycle_rx_skb(dev, slot, len);
1692 skb = copy_skb;
1693 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1694 goto oom;
1695
1696 skb_put(skb, len);
1697 push_packet:
1698 skb->dev = dev->ndev;
1699 skb->protocol = eth_type_trans(skb, dev->ndev);
1700 emac_rx_csum(dev, skb, ctrl);
1701
1702 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1703 ++dev->estats.rx_dropped_stack;
1704 next:
1705 ++dev->stats.rx_packets;
1706 skip:
1707 dev->stats.rx_bytes += len;
1708 slot = (slot + 1) % NUM_RX_BUFF;
1709 --budget;
1710 ++received;
1711 continue;
1712 sg:
1713 if (ctrl & MAL_RX_CTRL_FIRST) {
1714 BUG_ON(dev->rx_sg_skb);
1715 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1716 DBG(dev, "rx OOM %d" NL, slot);
1717 ++dev->estats.rx_dropped_oom;
1718 emac_recycle_rx_skb(dev, slot, 0);
1719 } else {
1720 dev->rx_sg_skb = skb;
1721 skb_put(skb, len);
1722 }
1723 } else if (!emac_rx_sg_append(dev, slot) &&
1724 (ctrl & MAL_RX_CTRL_LAST)) {
1725
1726 skb = dev->rx_sg_skb;
1727 dev->rx_sg_skb = NULL;
1728
1729 ctrl &= EMAC_BAD_RX_MASK;
1730 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1731 emac_parse_rx_error(dev, ctrl);
1732 ++dev->estats.rx_dropped_error;
1733 dev_kfree_skb(skb);
1734 len = 0;
1735 } else
1736 goto push_packet;
1737 }
1738 goto skip;
1739 oom:
1740 DBG(dev, "rx OOM %d" NL, slot);
1741 /* Drop the packet and recycle skb */
1742 ++dev->estats.rx_dropped_oom;
1743 emac_recycle_rx_skb(dev, slot, 0);
1744 goto next;
1745 }
1746
1747 if (received) {
1748 DBG2(dev, "rx %d BDs" NL, received);
1749 dev->rx_slot = slot;
1750 }
1751
1752 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1753 mb();
1754 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1755 DBG2(dev, "rx restart" NL);
1756 received = 0;
1757 goto again;
1758 }
1759
1760 if (dev->rx_sg_skb) {
1761 DBG2(dev, "dropping partial rx packet" NL);
1762 ++dev->estats.rx_dropped_error;
1763 dev_kfree_skb(dev->rx_sg_skb);
1764 dev->rx_sg_skb = NULL;
1765 }
1766
1767 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1768 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1769 emac_rx_enable(dev);
1770 dev->rx_slot = 0;
1771 }
1772 return received;
1773 }
1774
1775 /* NAPI poll context */
1776 static int emac_peek_rx(void *param)
1777 {
1778 struct emac_instance *dev = param;
1779
1780 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1781 }
1782
1783 /* NAPI poll context */
1784 static int emac_peek_rx_sg(void *param)
1785 {
1786 struct emac_instance *dev = param;
1787
1788 int slot = dev->rx_slot;
1789 while (1) {
1790 u16 ctrl = dev->rx_desc[slot].ctrl;
1791 if (ctrl & MAL_RX_CTRL_EMPTY)
1792 return 0;
1793 else if (ctrl & MAL_RX_CTRL_LAST)
1794 return 1;
1795
1796 slot = (slot + 1) % NUM_RX_BUFF;
1797
1798 /* I'm just being paranoid here :) */
1799 if (unlikely(slot == dev->rx_slot))
1800 return 0;
1801 }
1802 }
1803
1804 /* Hard IRQ */
1805 static void emac_rxde(void *param)
1806 {
1807 struct emac_instance *dev = param;
1808
1809 ++dev->estats.rx_stopped;
1810 emac_rx_disable_async(dev);
1811 }
1812
1813 /* Hard IRQ */
1814 static irqreturn_t emac_irq(int irq, void *dev_instance)
1815 {
1816 struct emac_instance *dev = dev_instance;
1817 struct emac_regs __iomem *p = dev->emacp;
1818 struct emac_error_stats *st = &dev->estats;
1819 u32 isr;
1820
1821 spin_lock(&dev->lock);
1822
1823 isr = in_be32(&p->isr);
1824 out_be32(&p->isr, isr);
1825
1826 DBG(dev, "isr = %08x" NL, isr);
1827
1828 if (isr & EMAC4_ISR_TXPE)
1829 ++st->tx_parity;
1830 if (isr & EMAC4_ISR_RXPE)
1831 ++st->rx_parity;
1832 if (isr & EMAC4_ISR_TXUE)
1833 ++st->tx_underrun;
1834 if (isr & EMAC4_ISR_RXOE)
1835 ++st->rx_fifo_overrun;
1836 if (isr & EMAC_ISR_OVR)
1837 ++st->rx_overrun;
1838 if (isr & EMAC_ISR_BP)
1839 ++st->rx_bad_packet;
1840 if (isr & EMAC_ISR_RP)
1841 ++st->rx_runt_packet;
1842 if (isr & EMAC_ISR_SE)
1843 ++st->rx_short_event;
1844 if (isr & EMAC_ISR_ALE)
1845 ++st->rx_alignment_error;
1846 if (isr & EMAC_ISR_BFCS)
1847 ++st->rx_bad_fcs;
1848 if (isr & EMAC_ISR_PTLE)
1849 ++st->rx_packet_too_long;
1850 if (isr & EMAC_ISR_ORE)
1851 ++st->rx_out_of_range;
1852 if (isr & EMAC_ISR_IRE)
1853 ++st->rx_in_range;
1854 if (isr & EMAC_ISR_SQE)
1855 ++st->tx_sqe;
1856 if (isr & EMAC_ISR_TE)
1857 ++st->tx_errors;
1858
1859 spin_unlock(&dev->lock);
1860
1861 return IRQ_HANDLED;
1862 }
1863
1864 static struct net_device_stats *emac_stats(struct net_device *ndev)
1865 {
1866 struct emac_instance *dev = netdev_priv(ndev);
1867 struct emac_stats *st = &dev->stats;
1868 struct emac_error_stats *est = &dev->estats;
1869 struct net_device_stats *nst = &dev->nstats;
1870 unsigned long flags;
1871
1872 DBG2(dev, "stats" NL);
1873
1874 /* Compute "legacy" statistics */
1875 spin_lock_irqsave(&dev->lock, flags);
1876 nst->rx_packets = (unsigned long)st->rx_packets;
1877 nst->rx_bytes = (unsigned long)st->rx_bytes;
1878 nst->tx_packets = (unsigned long)st->tx_packets;
1879 nst->tx_bytes = (unsigned long)st->tx_bytes;
1880 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1881 est->rx_dropped_error +
1882 est->rx_dropped_resize +
1883 est->rx_dropped_mtu);
1884 nst->tx_dropped = (unsigned long)est->tx_dropped;
1885
1886 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1887 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1888 est->rx_fifo_overrun +
1889 est->rx_overrun);
1890 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1891 est->rx_alignment_error);
1892 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1893 est->rx_bad_fcs);
1894 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1895 est->rx_bd_short_event +
1896 est->rx_bd_packet_too_long +
1897 est->rx_bd_out_of_range +
1898 est->rx_bd_in_range +
1899 est->rx_runt_packet +
1900 est->rx_short_event +
1901 est->rx_packet_too_long +
1902 est->rx_out_of_range +
1903 est->rx_in_range);
1904
1905 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1906 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1907 est->tx_underrun);
1908 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1909 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1910 est->tx_bd_excessive_collisions +
1911 est->tx_bd_late_collision +
1912 est->tx_bd_multple_collisions);
1913 spin_unlock_irqrestore(&dev->lock, flags);
1914 return nst;
1915 }
1916
1917 static struct mal_commac_ops emac_commac_ops = {
1918 .poll_tx = &emac_poll_tx,
1919 .poll_rx = &emac_poll_rx,
1920 .peek_rx = &emac_peek_rx,
1921 .rxde = &emac_rxde,
1922 };
1923
1924 static struct mal_commac_ops emac_commac_sg_ops = {
1925 .poll_tx = &emac_poll_tx,
1926 .poll_rx = &emac_poll_rx,
1927 .peek_rx = &emac_peek_rx_sg,
1928 .rxde = &emac_rxde,
1929 };
1930
1931 /* Ethtool support */
1932 static int emac_ethtool_get_settings(struct net_device *ndev,
1933 struct ethtool_cmd *cmd)
1934 {
1935 struct emac_instance *dev = netdev_priv(ndev);
1936
1937 cmd->supported = dev->phy.features;
1938 cmd->port = PORT_MII;
1939 cmd->phy_address = dev->phy.address;
1940 cmd->transceiver =
1941 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
1942
1943 mutex_lock(&dev->link_lock);
1944 cmd->advertising = dev->phy.advertising;
1945 cmd->autoneg = dev->phy.autoneg;
1946 cmd->speed = dev->phy.speed;
1947 cmd->duplex = dev->phy.duplex;
1948 mutex_unlock(&dev->link_lock);
1949
1950 return 0;
1951 }
1952
1953 static int emac_ethtool_set_settings(struct net_device *ndev,
1954 struct ethtool_cmd *cmd)
1955 {
1956 struct emac_instance *dev = netdev_priv(ndev);
1957 u32 f = dev->phy.features;
1958
1959 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
1960 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
1961
1962 /* Basic sanity checks */
1963 if (dev->phy.address < 0)
1964 return -EOPNOTSUPP;
1965 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
1966 return -EINVAL;
1967 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
1968 return -EINVAL;
1969 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
1970 return -EINVAL;
1971
1972 if (cmd->autoneg == AUTONEG_DISABLE) {
1973 switch (cmd->speed) {
1974 case SPEED_10:
1975 if (cmd->duplex == DUPLEX_HALF
1976 && !(f & SUPPORTED_10baseT_Half))
1977 return -EINVAL;
1978 if (cmd->duplex == DUPLEX_FULL
1979 && !(f & SUPPORTED_10baseT_Full))
1980 return -EINVAL;
1981 break;
1982 case SPEED_100:
1983 if (cmd->duplex == DUPLEX_HALF
1984 && !(f & SUPPORTED_100baseT_Half))
1985 return -EINVAL;
1986 if (cmd->duplex == DUPLEX_FULL
1987 && !(f & SUPPORTED_100baseT_Full))
1988 return -EINVAL;
1989 break;
1990 case SPEED_1000:
1991 if (cmd->duplex == DUPLEX_HALF
1992 && !(f & SUPPORTED_1000baseT_Half))
1993 return -EINVAL;
1994 if (cmd->duplex == DUPLEX_FULL
1995 && !(f & SUPPORTED_1000baseT_Full))
1996 return -EINVAL;
1997 break;
1998 default:
1999 return -EINVAL;
2000 }
2001
2002 mutex_lock(&dev->link_lock);
2003 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2004 cmd->duplex);
2005 mutex_unlock(&dev->link_lock);
2006
2007 } else {
2008 if (!(f & SUPPORTED_Autoneg))
2009 return -EINVAL;
2010
2011 mutex_lock(&dev->link_lock);
2012 dev->phy.def->ops->setup_aneg(&dev->phy,
2013 (cmd->advertising & f) |
2014 (dev->phy.advertising &
2015 (ADVERTISED_Pause |
2016 ADVERTISED_Asym_Pause)));
2017 mutex_unlock(&dev->link_lock);
2018 }
2019 emac_force_link_update(dev);
2020
2021 return 0;
2022 }
2023
2024 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2025 struct ethtool_ringparam *rp)
2026 {
2027 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2028 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2029 }
2030
2031 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2032 struct ethtool_pauseparam *pp)
2033 {
2034 struct emac_instance *dev = netdev_priv(ndev);
2035
2036 mutex_lock(&dev->link_lock);
2037 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2038 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2039 pp->autoneg = 1;
2040
2041 if (dev->phy.duplex == DUPLEX_FULL) {
2042 if (dev->phy.pause)
2043 pp->rx_pause = pp->tx_pause = 1;
2044 else if (dev->phy.asym_pause)
2045 pp->tx_pause = 1;
2046 }
2047 mutex_unlock(&dev->link_lock);
2048 }
2049
2050 static u32 emac_ethtool_get_rx_csum(struct net_device *ndev)
2051 {
2052 struct emac_instance *dev = netdev_priv(ndev);
2053
2054 return dev->tah_dev != NULL;
2055 }
2056
2057 static int emac_get_regs_len(struct emac_instance *dev)
2058 {
2059 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
2060 return sizeof(struct emac_ethtool_regs_subhdr) +
2061 EMAC4_ETHTOOL_REGS_SIZE(dev);
2062 else
2063 return sizeof(struct emac_ethtool_regs_subhdr) +
2064 EMAC_ETHTOOL_REGS_SIZE(dev);
2065 }
2066
2067 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2068 {
2069 struct emac_instance *dev = netdev_priv(ndev);
2070 int size;
2071
2072 size = sizeof(struct emac_ethtool_regs_hdr) +
2073 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2074 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2075 size += zmii_get_regs_len(dev->zmii_dev);
2076 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2077 size += rgmii_get_regs_len(dev->rgmii_dev);
2078 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2079 size += tah_get_regs_len(dev->tah_dev);
2080
2081 return size;
2082 }
2083
2084 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2085 {
2086 struct emac_ethtool_regs_subhdr *hdr = buf;
2087
2088 hdr->index = dev->cell_index;
2089 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2090 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2091 memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev));
2092 return ((void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev));
2093 } else {
2094 hdr->version = EMAC_ETHTOOL_REGS_VER;
2095 memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev));
2096 return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev));
2097 }
2098 }
2099
2100 static void emac_ethtool_get_regs(struct net_device *ndev,
2101 struct ethtool_regs *regs, void *buf)
2102 {
2103 struct emac_instance *dev = netdev_priv(ndev);
2104 struct emac_ethtool_regs_hdr *hdr = buf;
2105
2106 hdr->components = 0;
2107 buf = hdr + 1;
2108
2109 buf = mal_dump_regs(dev->mal, buf);
2110 buf = emac_dump_regs(dev, buf);
2111 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2112 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2113 buf = zmii_dump_regs(dev->zmii_dev, buf);
2114 }
2115 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2116 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2117 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2118 }
2119 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2120 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2121 buf = tah_dump_regs(dev->tah_dev, buf);
2122 }
2123 }
2124
2125 static int emac_ethtool_nway_reset(struct net_device *ndev)
2126 {
2127 struct emac_instance *dev = netdev_priv(ndev);
2128 int res = 0;
2129
2130 DBG(dev, "nway_reset" NL);
2131
2132 if (dev->phy.address < 0)
2133 return -EOPNOTSUPP;
2134
2135 mutex_lock(&dev->link_lock);
2136 if (!dev->phy.autoneg) {
2137 res = -EINVAL;
2138 goto out;
2139 }
2140
2141 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2142 out:
2143 mutex_unlock(&dev->link_lock);
2144 emac_force_link_update(dev);
2145 return res;
2146 }
2147
2148 static int emac_ethtool_get_stats_count(struct net_device *ndev)
2149 {
2150 return EMAC_ETHTOOL_STATS_COUNT;
2151 }
2152
2153 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2154 u8 * buf)
2155 {
2156 if (stringset == ETH_SS_STATS)
2157 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2158 }
2159
2160 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2161 struct ethtool_stats *estats,
2162 u64 * tmp_stats)
2163 {
2164 struct emac_instance *dev = netdev_priv(ndev);
2165
2166 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2167 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2168 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2169 }
2170
2171 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2172 struct ethtool_drvinfo *info)
2173 {
2174 struct emac_instance *dev = netdev_priv(ndev);
2175
2176 strcpy(info->driver, "ibm_emac");
2177 strcpy(info->version, DRV_VERSION);
2178 info->fw_version[0] = '\0';
2179 sprintf(info->bus_info, "PPC 4xx EMAC-%d %s",
2180 dev->cell_index, dev->ofdev->node->full_name);
2181 info->n_stats = emac_ethtool_get_stats_count(ndev);
2182 info->regdump_len = emac_ethtool_get_regs_len(ndev);
2183 }
2184
2185 static const struct ethtool_ops emac_ethtool_ops = {
2186 .get_settings = emac_ethtool_get_settings,
2187 .set_settings = emac_ethtool_set_settings,
2188 .get_drvinfo = emac_ethtool_get_drvinfo,
2189
2190 .get_regs_len = emac_ethtool_get_regs_len,
2191 .get_regs = emac_ethtool_get_regs,
2192
2193 .nway_reset = emac_ethtool_nway_reset,
2194
2195 .get_ringparam = emac_ethtool_get_ringparam,
2196 .get_pauseparam = emac_ethtool_get_pauseparam,
2197
2198 .get_rx_csum = emac_ethtool_get_rx_csum,
2199
2200 .get_strings = emac_ethtool_get_strings,
2201 .get_stats_count = emac_ethtool_get_stats_count,
2202 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2203
2204 .get_link = ethtool_op_get_link,
2205 .get_tx_csum = ethtool_op_get_tx_csum,
2206 .get_sg = ethtool_op_get_sg,
2207 };
2208
2209 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2210 {
2211 struct emac_instance *dev = netdev_priv(ndev);
2212 uint16_t *data = (uint16_t *) & rq->ifr_ifru;
2213
2214 DBG(dev, "ioctl %08x" NL, cmd);
2215
2216 if (dev->phy.address < 0)
2217 return -EOPNOTSUPP;
2218
2219 switch (cmd) {
2220 case SIOCGMIIPHY:
2221 case SIOCDEVPRIVATE:
2222 data[0] = dev->phy.address;
2223 /* Fall through */
2224 case SIOCGMIIREG:
2225 case SIOCDEVPRIVATE + 1:
2226 data[3] = emac_mdio_read(ndev, dev->phy.address, data[1]);
2227 return 0;
2228
2229 case SIOCSMIIREG:
2230 case SIOCDEVPRIVATE + 2:
2231 if (!capable(CAP_NET_ADMIN))
2232 return -EPERM;
2233 emac_mdio_write(ndev, dev->phy.address, data[1], data[2]);
2234 return 0;
2235 default:
2236 return -EOPNOTSUPP;
2237 }
2238 }
2239
2240 struct emac_depentry {
2241 u32 phandle;
2242 struct device_node *node;
2243 struct of_device *ofdev;
2244 void *drvdata;
2245 };
2246
2247 #define EMAC_DEP_MAL_IDX 0
2248 #define EMAC_DEP_ZMII_IDX 1
2249 #define EMAC_DEP_RGMII_IDX 2
2250 #define EMAC_DEP_TAH_IDX 3
2251 #define EMAC_DEP_MDIO_IDX 4
2252 #define EMAC_DEP_PREV_IDX 5
2253 #define EMAC_DEP_COUNT 6
2254
2255 static int __devinit emac_check_deps(struct emac_instance *dev,
2256 struct emac_depentry *deps)
2257 {
2258 int i, there = 0;
2259 struct device_node *np;
2260
2261 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2262 /* no dependency on that item, allright */
2263 if (deps[i].phandle == 0) {
2264 there++;
2265 continue;
2266 }
2267 /* special case for blist as the dependency might go away */
2268 if (i == EMAC_DEP_PREV_IDX) {
2269 np = *(dev->blist - 1);
2270 if (np == NULL) {
2271 deps[i].phandle = 0;
2272 there++;
2273 continue;
2274 }
2275 if (deps[i].node == NULL)
2276 deps[i].node = of_node_get(np);
2277 }
2278 if (deps[i].node == NULL)
2279 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2280 if (deps[i].node == NULL)
2281 continue;
2282 if (deps[i].ofdev == NULL)
2283 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2284 if (deps[i].ofdev == NULL)
2285 continue;
2286 if (deps[i].drvdata == NULL)
2287 deps[i].drvdata = dev_get_drvdata(&deps[i].ofdev->dev);
2288 if (deps[i].drvdata != NULL)
2289 there++;
2290 }
2291 return (there == EMAC_DEP_COUNT);
2292 }
2293
2294 static void emac_put_deps(struct emac_instance *dev)
2295 {
2296 if (dev->mal_dev)
2297 of_dev_put(dev->mal_dev);
2298 if (dev->zmii_dev)
2299 of_dev_put(dev->zmii_dev);
2300 if (dev->rgmii_dev)
2301 of_dev_put(dev->rgmii_dev);
2302 if (dev->mdio_dev)
2303 of_dev_put(dev->mdio_dev);
2304 if (dev->tah_dev)
2305 of_dev_put(dev->tah_dev);
2306 }
2307
2308 static int __devinit emac_of_bus_notify(struct notifier_block *nb,
2309 unsigned long action, void *data)
2310 {
2311 /* We are only intereted in device addition */
2312 if (action == BUS_NOTIFY_BOUND_DRIVER)
2313 wake_up_all(&emac_probe_wait);
2314 return 0;
2315 }
2316
2317 static struct notifier_block emac_of_bus_notifier __devinitdata = {
2318 .notifier_call = emac_of_bus_notify
2319 };
2320
2321 static int __devinit emac_wait_deps(struct emac_instance *dev)
2322 {
2323 struct emac_depentry deps[EMAC_DEP_COUNT];
2324 int i, err;
2325
2326 memset(&deps, 0, sizeof(deps));
2327
2328 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2329 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2330 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2331 if (dev->tah_ph)
2332 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2333 if (dev->mdio_ph)
2334 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2335 if (dev->blist && dev->blist > emac_boot_list)
2336 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2337 bus_register_notifier(&of_platform_bus_type, &emac_of_bus_notifier);
2338 wait_event_timeout(emac_probe_wait,
2339 emac_check_deps(dev, deps),
2340 EMAC_PROBE_DEP_TIMEOUT);
2341 bus_unregister_notifier(&of_platform_bus_type, &emac_of_bus_notifier);
2342 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2343 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2344 if (deps[i].node)
2345 of_node_put(deps[i].node);
2346 if (err && deps[i].ofdev)
2347 of_dev_put(deps[i].ofdev);
2348 }
2349 if (err == 0) {
2350 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2351 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2352 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2353 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2354 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2355 }
2356 if (deps[EMAC_DEP_PREV_IDX].ofdev)
2357 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2358 return err;
2359 }
2360
2361 static int __devinit emac_read_uint_prop(struct device_node *np, const char *name,
2362 u32 *val, int fatal)
2363 {
2364 int len;
2365 const u32 *prop = of_get_property(np, name, &len);
2366 if (prop == NULL || len < sizeof(u32)) {
2367 if (fatal)
2368 printk(KERN_ERR "%s: missing %s property\n",
2369 np->full_name, name);
2370 return -ENODEV;
2371 }
2372 *val = *prop;
2373 return 0;
2374 }
2375
2376 static int __devinit emac_init_phy(struct emac_instance *dev)
2377 {
2378 struct device_node *np = dev->ofdev->node;
2379 struct net_device *ndev = dev->ndev;
2380 u32 phy_map, adv;
2381 int i;
2382
2383 dev->phy.dev = ndev;
2384 dev->phy.mode = dev->phy_mode;
2385
2386 /* PHY-less configuration.
2387 * XXX I probably should move these settings to the dev tree
2388 */
2389 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2390 emac_reset(dev);
2391
2392 /* PHY-less configuration.
2393 * XXX I probably should move these settings to the dev tree
2394 */
2395 dev->phy.address = -1;
2396 dev->phy.features = SUPPORTED_MII;
2397 if (emac_phy_supports_gige(dev->phy_mode))
2398 dev->phy.features |= SUPPORTED_1000baseT_Full;
2399 else
2400 dev->phy.features |= SUPPORTED_100baseT_Full;
2401 dev->phy.pause = 1;
2402
2403 return 0;
2404 }
2405
2406 mutex_lock(&emac_phy_map_lock);
2407 phy_map = dev->phy_map | busy_phy_map;
2408
2409 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2410
2411 dev->phy.mdio_read = emac_mdio_read;
2412 dev->phy.mdio_write = emac_mdio_write;
2413
2414 /* Enable internal clock source */
2415 #ifdef CONFIG_PPC_DCR_NATIVE
2416 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2417 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2418 #endif
2419 /* PHY clock workaround */
2420 emac_rx_clk_tx(dev);
2421
2422 /* Enable internal clock source on 440GX*/
2423 #ifdef CONFIG_PPC_DCR_NATIVE
2424 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2425 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2426 #endif
2427 /* Configure EMAC with defaults so we can at least use MDIO
2428 * This is needed mostly for 440GX
2429 */
2430 if (emac_phy_gpcs(dev->phy.mode)) {
2431 /* XXX
2432 * Make GPCS PHY address equal to EMAC index.
2433 * We probably should take into account busy_phy_map
2434 * and/or phy_map here.
2435 *
2436 * Note that the busy_phy_map is currently global
2437 * while it should probably be per-ASIC...
2438 */
2439 dev->phy.gpcs_address = dev->gpcs_address;
2440 if (dev->phy.gpcs_address == 0xffffffff)
2441 dev->phy.address = dev->cell_index;
2442 }
2443
2444 emac_configure(dev);
2445
2446 if (dev->phy_address != 0xffffffff)
2447 phy_map = ~(1 << dev->phy_address);
2448
2449 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2450 if (!(phy_map & 1)) {
2451 int r;
2452 busy_phy_map |= 1 << i;
2453
2454 /* Quick check if there is a PHY at the address */
2455 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2456 if (r == 0xffff || r < 0)
2457 continue;
2458 if (!emac_mii_phy_probe(&dev->phy, i))
2459 break;
2460 }
2461
2462 /* Enable external clock source */
2463 #ifdef CONFIG_PPC_DCR_NATIVE
2464 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2465 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2466 #endif
2467 mutex_unlock(&emac_phy_map_lock);
2468 if (i == 0x20) {
2469 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2470 return -ENXIO;
2471 }
2472
2473 /* Init PHY */
2474 if (dev->phy.def->ops->init)
2475 dev->phy.def->ops->init(&dev->phy);
2476
2477 /* Disable any PHY features not supported by the platform */
2478 dev->phy.def->features &= ~dev->phy_feat_exc;
2479
2480 /* Setup initial link parameters */
2481 if (dev->phy.features & SUPPORTED_Autoneg) {
2482 adv = dev->phy.features;
2483 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2484 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2485 /* Restart autonegotiation */
2486 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2487 } else {
2488 u32 f = dev->phy.def->features;
2489 int speed = SPEED_10, fd = DUPLEX_HALF;
2490
2491 /* Select highest supported speed/duplex */
2492 if (f & SUPPORTED_1000baseT_Full) {
2493 speed = SPEED_1000;
2494 fd = DUPLEX_FULL;
2495 } else if (f & SUPPORTED_1000baseT_Half)
2496 speed = SPEED_1000;
2497 else if (f & SUPPORTED_100baseT_Full) {
2498 speed = SPEED_100;
2499 fd = DUPLEX_FULL;
2500 } else if (f & SUPPORTED_100baseT_Half)
2501 speed = SPEED_100;
2502 else if (f & SUPPORTED_10baseT_Full)
2503 fd = DUPLEX_FULL;
2504
2505 /* Force link parameters */
2506 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2507 }
2508 return 0;
2509 }
2510
2511 static int __devinit emac_init_config(struct emac_instance *dev)
2512 {
2513 struct device_node *np = dev->ofdev->node;
2514 const void *p;
2515 unsigned int plen;
2516 const char *pm, *phy_modes[] = {
2517 [PHY_MODE_NA] = "",
2518 [PHY_MODE_MII] = "mii",
2519 [PHY_MODE_RMII] = "rmii",
2520 [PHY_MODE_SMII] = "smii",
2521 [PHY_MODE_RGMII] = "rgmii",
2522 [PHY_MODE_TBI] = "tbi",
2523 [PHY_MODE_GMII] = "gmii",
2524 [PHY_MODE_RTBI] = "rtbi",
2525 [PHY_MODE_SGMII] = "sgmii",
2526 };
2527
2528 /* Read config from device-tree */
2529 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2530 return -ENXIO;
2531 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2532 return -ENXIO;
2533 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2534 return -ENXIO;
2535 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2536 return -ENXIO;
2537 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2538 dev->max_mtu = 1500;
2539 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2540 dev->rx_fifo_size = 2048;
2541 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2542 dev->tx_fifo_size = 2048;
2543 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2544 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2545 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2546 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2547 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2548 dev->phy_address = 0xffffffff;
2549 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2550 dev->phy_map = 0xffffffff;
2551 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2552 dev->gpcs_address = 0xffffffff;
2553 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2554 return -ENXIO;
2555 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2556 dev->tah_ph = 0;
2557 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2558 dev->tah_port = 0;
2559 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2560 dev->mdio_ph = 0;
2561 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2562 dev->zmii_ph = 0;;
2563 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2564 dev->zmii_port = 0xffffffff;;
2565 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2566 dev->rgmii_ph = 0;;
2567 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2568 dev->rgmii_port = 0xffffffff;;
2569 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2570 dev->fifo_entry_size = 16;
2571 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2572 dev->mal_burst_size = 256;
2573
2574 /* PHY mode needs some decoding */
2575 dev->phy_mode = PHY_MODE_NA;
2576 pm = of_get_property(np, "phy-mode", &plen);
2577 if (pm != NULL) {
2578 int i;
2579 for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
2580 if (!strcasecmp(pm, phy_modes[i])) {
2581 dev->phy_mode = i;
2582 break;
2583 }
2584 }
2585
2586 /* Backward compat with non-final DT */
2587 if (dev->phy_mode == PHY_MODE_NA && pm != NULL && plen == 4) {
2588 u32 nmode = *(const u32 *)pm;
2589 if (nmode > PHY_MODE_NA && nmode <= PHY_MODE_SGMII)
2590 dev->phy_mode = nmode;
2591 }
2592
2593 /* Check EMAC version */
2594 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2595 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2596 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2597 of_device_is_compatible(np, "ibm,emac-460gt"))
2598 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2599 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2600 dev->features |= EMAC_FTR_EMAC4;
2601 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2602 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2603 } else {
2604 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2605 of_device_is_compatible(np, "ibm,emac-440gr"))
2606 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2607 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2608 #ifdef CONFIG_IBM_NEW_EMAC_NO_FLOW_CONTROL
2609 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2610 #else
2611 printk(KERN_ERR "%s: Flow control not disabled!\n",
2612 np->full_name);
2613 return -ENXIO;
2614 #endif
2615 }
2616
2617 }
2618
2619 /* Fixup some feature bits based on the device tree */
2620 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2621 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2622 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2623 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2624
2625 /* CAB lacks the appropriate properties */
2626 if (of_device_is_compatible(np, "ibm,emac-axon"))
2627 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2628 EMAC_FTR_STACR_OC_INVERT;
2629
2630 /* Enable TAH/ZMII/RGMII features as found */
2631 if (dev->tah_ph != 0) {
2632 #ifdef CONFIG_IBM_NEW_EMAC_TAH
2633 dev->features |= EMAC_FTR_HAS_TAH;
2634 #else
2635 printk(KERN_ERR "%s: TAH support not enabled !\n",
2636 np->full_name);
2637 return -ENXIO;
2638 #endif
2639 }
2640
2641 if (dev->zmii_ph != 0) {
2642 #ifdef CONFIG_IBM_NEW_EMAC_ZMII
2643 dev->features |= EMAC_FTR_HAS_ZMII;
2644 #else
2645 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2646 np->full_name);
2647 return -ENXIO;
2648 #endif
2649 }
2650
2651 if (dev->rgmii_ph != 0) {
2652 #ifdef CONFIG_IBM_NEW_EMAC_RGMII
2653 dev->features |= EMAC_FTR_HAS_RGMII;
2654 #else
2655 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2656 np->full_name);
2657 return -ENXIO;
2658 #endif
2659 }
2660
2661 /* Read MAC-address */
2662 p = of_get_property(np, "local-mac-address", NULL);
2663 if (p == NULL) {
2664 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2665 np->full_name);
2666 return -ENXIO;
2667 }
2668 memcpy(dev->ndev->dev_addr, p, 6);
2669
2670 /* IAHT and GAHT filter parameterization */
2671 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2672 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2673 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2674 } else {
2675 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2676 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2677 }
2678
2679 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2680 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2681 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2682 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2683 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2684
2685 return 0;
2686 }
2687
2688 static int __devinit emac_probe(struct of_device *ofdev,
2689 const struct of_device_id *match)
2690 {
2691 struct net_device *ndev;
2692 struct emac_instance *dev;
2693 struct device_node *np = ofdev->node;
2694 struct device_node **blist = NULL;
2695 int err, i;
2696
2697 /* Skip unused/unwired EMACS. We leave the check for an unused
2698 * property here for now, but new flat device trees should set a
2699 * status property to "disabled" instead.
2700 */
2701 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2702 return -ENODEV;
2703
2704 /* Find ourselves in the bootlist if we are there */
2705 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2706 if (emac_boot_list[i] == np)
2707 blist = &emac_boot_list[i];
2708
2709 /* Allocate our net_device structure */
2710 err = -ENOMEM;
2711 ndev = alloc_etherdev(sizeof(struct emac_instance));
2712 if (!ndev) {
2713 printk(KERN_ERR "%s: could not allocate ethernet device!\n",
2714 np->full_name);
2715 goto err_gone;
2716 }
2717 dev = netdev_priv(ndev);
2718 dev->ndev = ndev;
2719 dev->ofdev = ofdev;
2720 dev->blist = blist;
2721 SET_NETDEV_DEV(ndev, &ofdev->dev);
2722
2723 /* Initialize some embedded data structures */
2724 mutex_init(&dev->mdio_lock);
2725 mutex_init(&dev->link_lock);
2726 spin_lock_init(&dev->lock);
2727 INIT_WORK(&dev->reset_work, emac_reset_work);
2728
2729 /* Init various config data based on device-tree */
2730 err = emac_init_config(dev);
2731 if (err != 0)
2732 goto err_free;
2733
2734 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2735 dev->emac_irq = irq_of_parse_and_map(np, 0);
2736 dev->wol_irq = irq_of_parse_and_map(np, 1);
2737 if (dev->emac_irq == NO_IRQ) {
2738 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2739 goto err_free;
2740 }
2741 ndev->irq = dev->emac_irq;
2742
2743 /* Map EMAC regs */
2744 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2745 printk(KERN_ERR "%s: Can't get registers address\n",
2746 np->full_name);
2747 goto err_irq_unmap;
2748 }
2749 // TODO : request_mem_region
2750 dev->emacp = ioremap(dev->rsrc_regs.start,
2751 dev->rsrc_regs.end - dev->rsrc_regs.start + 1);
2752 if (dev->emacp == NULL) {
2753 printk(KERN_ERR "%s: Can't map device registers!\n",
2754 np->full_name);
2755 err = -ENOMEM;
2756 goto err_irq_unmap;
2757 }
2758
2759 /* Wait for dependent devices */
2760 err = emac_wait_deps(dev);
2761 if (err) {
2762 printk(KERN_ERR
2763 "%s: Timeout waiting for dependent devices\n",
2764 np->full_name);
2765 /* display more info about what's missing ? */
2766 goto err_reg_unmap;
2767 }
2768 dev->mal = dev_get_drvdata(&dev->mal_dev->dev);
2769 if (dev->mdio_dev != NULL)
2770 dev->mdio_instance = dev_get_drvdata(&dev->mdio_dev->dev);
2771
2772 /* Register with MAL */
2773 dev->commac.ops = &emac_commac_ops;
2774 dev->commac.dev = dev;
2775 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2776 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2777 err = mal_register_commac(dev->mal, &dev->commac);
2778 if (err) {
2779 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2780 np->full_name, dev->mal_dev->node->full_name);
2781 goto err_rel_deps;
2782 }
2783 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2784 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2785
2786 /* Get pointers to BD rings */
2787 dev->tx_desc =
2788 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2789 dev->rx_desc =
2790 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2791
2792 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2793 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2794
2795 /* Clean rings */
2796 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2797 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2798 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2799 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2800
2801 /* Attach to ZMII, if needed */
2802 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2803 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2804 goto err_unreg_commac;
2805
2806 /* Attach to RGMII, if needed */
2807 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2808 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2809 goto err_detach_zmii;
2810
2811 /* Attach to TAH, if needed */
2812 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2813 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2814 goto err_detach_rgmii;
2815
2816 /* Set some link defaults before we can find out real parameters */
2817 dev->phy.speed = SPEED_100;
2818 dev->phy.duplex = DUPLEX_FULL;
2819 dev->phy.autoneg = AUTONEG_DISABLE;
2820 dev->phy.pause = dev->phy.asym_pause = 0;
2821 dev->stop_timeout = STOP_TIMEOUT_100;
2822 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2823
2824 /* Find PHY if any */
2825 err = emac_init_phy(dev);
2826 if (err != 0)
2827 goto err_detach_tah;
2828
2829 /* Fill in the driver function table */
2830 ndev->open = &emac_open;
2831 if (dev->tah_dev)
2832 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
2833 ndev->tx_timeout = &emac_tx_timeout;
2834 ndev->watchdog_timeo = 5 * HZ;
2835 ndev->stop = &emac_close;
2836 ndev->get_stats = &emac_stats;
2837 ndev->set_multicast_list = &emac_set_multicast_list;
2838 ndev->do_ioctl = &emac_ioctl;
2839 if (emac_phy_supports_gige(dev->phy_mode)) {
2840 ndev->hard_start_xmit = &emac_start_xmit_sg;
2841 ndev->change_mtu = &emac_change_mtu;
2842 dev->commac.ops = &emac_commac_sg_ops;
2843 } else {
2844 ndev->hard_start_xmit = &emac_start_xmit;
2845 }
2846 SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
2847
2848 netif_carrier_off(ndev);
2849 netif_stop_queue(ndev);
2850
2851 err = register_netdev(ndev);
2852 if (err) {
2853 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2854 np->full_name, err);
2855 goto err_detach_tah;
2856 }
2857
2858 /* Set our drvdata last as we don't want them visible until we are
2859 * fully initialized
2860 */
2861 wmb();
2862 dev_set_drvdata(&ofdev->dev, dev);
2863
2864 /* There's a new kid in town ! Let's tell everybody */
2865 wake_up_all(&emac_probe_wait);
2866
2867
2868 printk(KERN_INFO
2869 "%s: EMAC-%d %s, MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2870 ndev->name, dev->cell_index, np->full_name,
2871 ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
2872 ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
2873
2874 if (dev->phy_mode == PHY_MODE_SGMII)
2875 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2876
2877 if (dev->phy.address >= 0)
2878 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2879 dev->phy.def->name, dev->phy.address);
2880
2881 emac_dbg_register(dev);
2882
2883 /* Life is good */
2884 return 0;
2885
2886 /* I have a bad feeling about this ... */
2887
2888 err_detach_tah:
2889 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2890 tah_detach(dev->tah_dev, dev->tah_port);
2891 err_detach_rgmii:
2892 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2893 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2894 err_detach_zmii:
2895 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2896 zmii_detach(dev->zmii_dev, dev->zmii_port);
2897 err_unreg_commac:
2898 mal_unregister_commac(dev->mal, &dev->commac);
2899 err_rel_deps:
2900 emac_put_deps(dev);
2901 err_reg_unmap:
2902 iounmap(dev->emacp);
2903 err_irq_unmap:
2904 if (dev->wol_irq != NO_IRQ)
2905 irq_dispose_mapping(dev->wol_irq);
2906 if (dev->emac_irq != NO_IRQ)
2907 irq_dispose_mapping(dev->emac_irq);
2908 err_free:
2909 kfree(ndev);
2910 err_gone:
2911 /* if we were on the bootlist, remove us as we won't show up and
2912 * wake up all waiters to notify them in case they were waiting
2913 * on us
2914 */
2915 if (blist) {
2916 *blist = NULL;
2917 wake_up_all(&emac_probe_wait);
2918 }
2919 return err;
2920 }
2921
2922 static int __devexit emac_remove(struct of_device *ofdev)
2923 {
2924 struct emac_instance *dev = dev_get_drvdata(&ofdev->dev);
2925
2926 DBG(dev, "remove" NL);
2927
2928 dev_set_drvdata(&ofdev->dev, NULL);
2929
2930 unregister_netdev(dev->ndev);
2931
2932 flush_scheduled_work();
2933
2934 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2935 tah_detach(dev->tah_dev, dev->tah_port);
2936 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2937 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2938 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2939 zmii_detach(dev->zmii_dev, dev->zmii_port);
2940
2941 mal_unregister_commac(dev->mal, &dev->commac);
2942 emac_put_deps(dev);
2943
2944 emac_dbg_unregister(dev);
2945 iounmap(dev->emacp);
2946
2947 if (dev->wol_irq != NO_IRQ)
2948 irq_dispose_mapping(dev->wol_irq);
2949 if (dev->emac_irq != NO_IRQ)
2950 irq_dispose_mapping(dev->emac_irq);
2951
2952 kfree(dev->ndev);
2953
2954 return 0;
2955 }
2956
2957 /* XXX Features in here should be replaced by properties... */
2958 static struct of_device_id emac_match[] =
2959 {
2960 {
2961 .type = "network",
2962 .compatible = "ibm,emac",
2963 },
2964 {
2965 .type = "network",
2966 .compatible = "ibm,emac4",
2967 },
2968 {
2969 .type = "network",
2970 .compatible = "ibm,emac4sync",
2971 },
2972 {},
2973 };
2974
2975 static struct of_platform_driver emac_driver = {
2976 .name = "emac",
2977 .match_table = emac_match,
2978
2979 .probe = emac_probe,
2980 .remove = emac_remove,
2981 };
2982
2983 static void __init emac_make_bootlist(void)
2984 {
2985 struct device_node *np = NULL;
2986 int j, max, i = 0, k;
2987 int cell_indices[EMAC_BOOT_LIST_SIZE];
2988
2989 /* Collect EMACs */
2990 while((np = of_find_all_nodes(np)) != NULL) {
2991 const u32 *idx;
2992
2993 if (of_match_node(emac_match, np) == NULL)
2994 continue;
2995 if (of_get_property(np, "unused", NULL))
2996 continue;
2997 idx = of_get_property(np, "cell-index", NULL);
2998 if (idx == NULL)
2999 continue;
3000 cell_indices[i] = *idx;
3001 emac_boot_list[i++] = of_node_get(np);
3002 if (i >= EMAC_BOOT_LIST_SIZE) {
3003 of_node_put(np);
3004 break;
3005 }
3006 }
3007 max = i;
3008
3009 /* Bubble sort them (doh, what a creative algorithm :-) */
3010 for (i = 0; max > 1 && (i < (max - 1)); i++)
3011 for (j = i; j < max; j++) {
3012 if (cell_indices[i] > cell_indices[j]) {
3013 np = emac_boot_list[i];
3014 emac_boot_list[i] = emac_boot_list[j];
3015 emac_boot_list[j] = np;
3016 k = cell_indices[i];
3017 cell_indices[i] = cell_indices[j];
3018 cell_indices[j] = k;
3019 }
3020 }
3021 }
3022
3023 static int __init emac_init(void)
3024 {
3025 int rc;
3026
3027 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3028
3029 /* Init debug stuff */
3030 emac_init_debug();
3031
3032 /* Build EMAC boot list */
3033 emac_make_bootlist();
3034
3035 /* Init submodules */
3036 rc = mal_init();
3037 if (rc)
3038 goto err;
3039 rc = zmii_init();
3040 if (rc)
3041 goto err_mal;
3042 rc = rgmii_init();
3043 if (rc)
3044 goto err_zmii;
3045 rc = tah_init();
3046 if (rc)
3047 goto err_rgmii;
3048 rc = of_register_platform_driver(&emac_driver);
3049 if (rc)
3050 goto err_tah;
3051
3052 return 0;
3053
3054 err_tah:
3055 tah_exit();
3056 err_rgmii:
3057 rgmii_exit();
3058 err_zmii:
3059 zmii_exit();
3060 err_mal:
3061 mal_exit();
3062 err:
3063 return rc;
3064 }
3065
3066 static void __exit emac_exit(void)
3067 {
3068 int i;
3069
3070 of_unregister_platform_driver(&emac_driver);
3071
3072 tah_exit();
3073 rgmii_exit();
3074 zmii_exit();
3075 mal_exit();
3076 emac_fini_debug();
3077
3078 /* Destroy EMAC boot list */
3079 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3080 if (emac_boot_list[i])
3081 of_node_put(emac_boot_list[i]);
3082 }
3083
3084 module_init(emac_init);
3085 module_exit(emac_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree