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Linux 3.4.102
[linux/fpc-iii.git] / drivers / net / ethernet / ibm / emac / core.c
bloba0fe6e3fce61a5ad7b4b17b7de723e0798ab9086
1 /*
2 * drivers/net/ethernet/ibm/emac/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/module.h>
28 #include <linux/sched.h>
29 #include <linux/string.h>
30 #include <linux/errno.h>
31 #include <linux/delay.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/crc32.h>
37 #include <linux/ethtool.h>
38 #include <linux/mii.h>
39 #include <linux/bitops.h>
40 #include <linux/workqueue.h>
41 #include <linux/of.h>
42 #include <linux/of_net.h>
43 #include <linux/slab.h>
44
45 #include <asm/processor.h>
46 #include <asm/io.h>
47 #include <asm/dma.h>
48 #include <asm/uaccess.h>
49 #include <asm/dcr.h>
50 #include <asm/dcr-regs.h>
51
52 #include "core.h"
53
54 /*
55 * Lack of dma_unmap_???? calls is intentional.
56 *
57 * API-correct usage requires additional support state information to be
58 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
59 * EMAC design (e.g. TX buffer passed from network stack can be split into
60 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
61 * maintaining such information will add additional overhead.
62 * Current DMA API implementation for 4xx processors only ensures cache coherency
63 * and dma_unmap_???? routines are empty and are likely to stay this way.
64 * I decided to omit dma_unmap_??? calls because I don't want to add additional
65 * complexity just for the sake of following some abstract API, when it doesn't
66 * add any real benefit to the driver. I understand that this decision maybe
67 * controversial, but I really tried to make code API-correct and efficient
68 * at the same time and didn't come up with code I liked :(. --ebs
69 */
70
71 #define DRV_NAME "emac"
72 #define DRV_VERSION "3.54"
73 #define DRV_DESC "PPC 4xx OCP EMAC driver"
74
75 MODULE_DESCRIPTION(DRV_DESC);
76 MODULE_AUTHOR
77 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
78 MODULE_LICENSE("GPL");
79
80 /*
81 * PPC64 doesn't (yet) have a cacheable_memcpy
82 */
83 #ifdef CONFIG_PPC64
84 #define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
85 #endif
86
87 /* minimum number of free TX descriptors required to wake up TX process */
88 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
89
90 /* If packet size is less than this number, we allocate small skb and copy packet
91 * contents into it instead of just sending original big skb up
92 */
93 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
94
95 /* Since multiple EMACs share MDIO lines in various ways, we need
96 * to avoid re-using the same PHY ID in cases where the arch didn't
97 * setup precise phy_map entries
98 *
99 * XXX This is something that needs to be reworked as we can have multiple
100 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
101 * probably require in that case to have explicit PHY IDs in the device-tree
102 */
103 static u32 busy_phy_map;
104 static DEFINE_MUTEX(emac_phy_map_lock);
105
106 /* This is the wait queue used to wait on any event related to probe, that
107 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
108 */
109 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
110
111 /* Having stable interface names is a doomed idea. However, it would be nice
112 * if we didn't have completely random interface names at boot too :-) It's
113 * just a matter of making everybody's life easier. Since we are doing
114 * threaded probing, it's a bit harder though. The base idea here is that
115 * we make up a list of all emacs in the device-tree before we register the
116 * driver. Every emac will then wait for the previous one in the list to
117 * initialize before itself. We should also keep that list ordered by
118 * cell_index.
119 * That list is only 4 entries long, meaning that additional EMACs don't
120 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
121 */
122
123 #define EMAC_BOOT_LIST_SIZE 4
124 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
125
126 /* How long should I wait for dependent devices ? */
127 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
128
129 /* I don't want to litter system log with timeout errors
130 * when we have brain-damaged PHY.
131 */
132 static inline void emac_report_timeout_error(struct emac_instance *dev,
133 const char *error)
134 {
135 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
136 EMAC_FTR_460EX_PHY_CLK_FIX |
137 EMAC_FTR_440EP_PHY_CLK_FIX))
138 DBG(dev, "%s" NL, error);
139 else if (net_ratelimit())
140 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
141 error);
142 }
143
144 /* EMAC PHY clock workaround:
145 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
146 * which allows controlling each EMAC clock
147 */
148 static inline void emac_rx_clk_tx(struct emac_instance *dev)
149 {
150 #ifdef CONFIG_PPC_DCR_NATIVE
151 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
152 dcri_clrset(SDR0, SDR0_MFR,
153 0, SDR0_MFR_ECS >> dev->cell_index);
154 #endif
155 }
156
157 static inline void emac_rx_clk_default(struct emac_instance *dev)
158 {
159 #ifdef CONFIG_PPC_DCR_NATIVE
160 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
161 dcri_clrset(SDR0, SDR0_MFR,
162 SDR0_MFR_ECS >> dev->cell_index, 0);
163 #endif
164 }
165
166 /* PHY polling intervals */
167 #define PHY_POLL_LINK_ON HZ
168 #define PHY_POLL_LINK_OFF (HZ / 5)
169
170 /* Graceful stop timeouts in us.
171 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
172 */
173 #define STOP_TIMEOUT_10 1230
174 #define STOP_TIMEOUT_100 124
175 #define STOP_TIMEOUT_1000 13
176 #define STOP_TIMEOUT_1000_JUMBO 73
177
178 static unsigned char default_mcast_addr[] = {
179 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
180 };
181
182 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
183 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
184 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
185 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
186 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
187 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
188 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
189 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
190 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
191 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
192 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
193 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
194 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
195 "tx_bd_excessive_collisions", "tx_bd_late_collision",
196 "tx_bd_multple_collisions", "tx_bd_single_collision",
197 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
198 "tx_errors"
199 };
200
201 static irqreturn_t emac_irq(int irq, void *dev_instance);
202 static void emac_clean_tx_ring(struct emac_instance *dev);
203 static void __emac_set_multicast_list(struct emac_instance *dev);
204
205 static inline int emac_phy_supports_gige(int phy_mode)
206 {
207 return phy_mode == PHY_MODE_GMII ||
208 phy_mode == PHY_MODE_RGMII ||
209 phy_mode == PHY_MODE_SGMII ||
210 phy_mode == PHY_MODE_TBI ||
211 phy_mode == PHY_MODE_RTBI;
212 }
213
214 static inline int emac_phy_gpcs(int phy_mode)
215 {
216 return phy_mode == PHY_MODE_SGMII ||
217 phy_mode == PHY_MODE_TBI ||
218 phy_mode == PHY_MODE_RTBI;
219 }
220
221 static inline void emac_tx_enable(struct emac_instance *dev)
222 {
223 struct emac_regs __iomem *p = dev->emacp;
224 u32 r;
225
226 DBG(dev, "tx_enable" NL);
227
228 r = in_be32(&p->mr0);
229 if (!(r & EMAC_MR0_TXE))
230 out_be32(&p->mr0, r | EMAC_MR0_TXE);
231 }
232
233 static void emac_tx_disable(struct emac_instance *dev)
234 {
235 struct emac_regs __iomem *p = dev->emacp;
236 u32 r;
237
238 DBG(dev, "tx_disable" NL);
239
240 r = in_be32(&p->mr0);
241 if (r & EMAC_MR0_TXE) {
242 int n = dev->stop_timeout;
243 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
244 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
245 udelay(1);
246 --n;
247 }
248 if (unlikely(!n))
249 emac_report_timeout_error(dev, "TX disable timeout");
250 }
251 }
252
253 static void emac_rx_enable(struct emac_instance *dev)
254 {
255 struct emac_regs __iomem *p = dev->emacp;
256 u32 r;
257
258 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
259 goto out;
260
261 DBG(dev, "rx_enable" NL);
262
263 r = in_be32(&p->mr0);
264 if (!(r & EMAC_MR0_RXE)) {
265 if (unlikely(!(r & EMAC_MR0_RXI))) {
266 /* Wait if previous async disable is still in progress */
267 int n = dev->stop_timeout;
268 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
269 udelay(1);
270 --n;
271 }
272 if (unlikely(!n))
273 emac_report_timeout_error(dev,
274 "RX disable timeout");
275 }
276 out_be32(&p->mr0, r | EMAC_MR0_RXE);
277 }
278 out:
279 ;
280 }
281
282 static void emac_rx_disable(struct emac_instance *dev)
283 {
284 struct emac_regs __iomem *p = dev->emacp;
285 u32 r;
286
287 DBG(dev, "rx_disable" NL);
288
289 r = in_be32(&p->mr0);
290 if (r & EMAC_MR0_RXE) {
291 int n = dev->stop_timeout;
292 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
293 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
294 udelay(1);
295 --n;
296 }
297 if (unlikely(!n))
298 emac_report_timeout_error(dev, "RX disable timeout");
299 }
300 }
301
302 static inline void emac_netif_stop(struct emac_instance *dev)
303 {
304 netif_tx_lock_bh(dev->ndev);
305 netif_addr_lock(dev->ndev);
306 dev->no_mcast = 1;
307 netif_addr_unlock(dev->ndev);
308 netif_tx_unlock_bh(dev->ndev);
309 dev->ndev->trans_start = jiffies; /* prevent tx timeout */
310 mal_poll_disable(dev->mal, &dev->commac);
311 netif_tx_disable(dev->ndev);
312 }
313
314 static inline void emac_netif_start(struct emac_instance *dev)
315 {
316 netif_tx_lock_bh(dev->ndev);
317 netif_addr_lock(dev->ndev);
318 dev->no_mcast = 0;
319 if (dev->mcast_pending && netif_running(dev->ndev))
320 __emac_set_multicast_list(dev);
321 netif_addr_unlock(dev->ndev);
322 netif_tx_unlock_bh(dev->ndev);
323
324 netif_wake_queue(dev->ndev);
325
326 /* NOTE: unconditional netif_wake_queue is only appropriate
327 * so long as all callers are assured to have free tx slots
328 * (taken from tg3... though the case where that is wrong is
329 * not terribly harmful)
330 */
331 mal_poll_enable(dev->mal, &dev->commac);
332 }
333
334 static inline void emac_rx_disable_async(struct emac_instance *dev)
335 {
336 struct emac_regs __iomem *p = dev->emacp;
337 u32 r;
338
339 DBG(dev, "rx_disable_async" NL);
340
341 r = in_be32(&p->mr0);
342 if (r & EMAC_MR0_RXE)
343 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
344 }
345
346 static int emac_reset(struct emac_instance *dev)
347 {
348 struct emac_regs __iomem *p = dev->emacp;
349 int n = 20;
350
351 DBG(dev, "reset" NL);
352
353 if (!dev->reset_failed) {
354 /* 40x erratum suggests stopping RX channel before reset,
355 * we stop TX as well
356 */
357 emac_rx_disable(dev);
358 emac_tx_disable(dev);
359 }
360
361 #ifdef CONFIG_PPC_DCR_NATIVE
362 /* Enable internal clock source */
363 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
364 dcri_clrset(SDR0, SDR0_ETH_CFG,
365 0, SDR0_ETH_CFG_ECS << dev->cell_index);
366 #endif
367
368 out_be32(&p->mr0, EMAC_MR0_SRST);
369 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
370 --n;
371
372 #ifdef CONFIG_PPC_DCR_NATIVE
373 /* Enable external clock source */
374 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
375 dcri_clrset(SDR0, SDR0_ETH_CFG,
376 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
377 #endif
378
379 if (n) {
380 dev->reset_failed = 0;
381 return 0;
382 } else {
383 emac_report_timeout_error(dev, "reset timeout");
384 dev->reset_failed = 1;
385 return -ETIMEDOUT;
386 }
387 }
388
389 static void emac_hash_mc(struct emac_instance *dev)
390 {
391 const int regs = EMAC_XAHT_REGS(dev);
392 u32 *gaht_base = emac_gaht_base(dev);
393 u32 gaht_temp[regs];
394 struct netdev_hw_addr *ha;
395 int i;
396
397 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
398
399 memset(gaht_temp, 0, sizeof (gaht_temp));
400
401 netdev_for_each_mc_addr(ha, dev->ndev) {
402 int slot, reg, mask;
403 DBG2(dev, "mc %pM" NL, ha->addr);
404
405 slot = EMAC_XAHT_CRC_TO_SLOT(dev,
406 ether_crc(ETH_ALEN, ha->addr));
407 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
408 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
409
410 gaht_temp[reg] |= mask;
411 }
412
413 for (i = 0; i < regs; i++)
414 out_be32(gaht_base + i, gaht_temp[i]);
415 }
416
417 static inline u32 emac_iff2rmr(struct net_device *ndev)
418 {
419 struct emac_instance *dev = netdev_priv(ndev);
420 u32 r;
421
422 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
423
424 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
425 r |= EMAC4_RMR_BASE;
426 else
427 r |= EMAC_RMR_BASE;
428
429 if (ndev->flags & IFF_PROMISC)
430 r |= EMAC_RMR_PME;
431 else if (ndev->flags & IFF_ALLMULTI ||
432 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
433 r |= EMAC_RMR_PMME;
434 else if (!netdev_mc_empty(ndev))
435 r |= EMAC_RMR_MAE;
436
437 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
438 r &= ~EMAC4_RMR_MJS_MASK;
439 r |= EMAC4_RMR_MJS(ndev->mtu);
440 }
441
442 return r;
443 }
444
445 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
446 {
447 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
448
449 DBG2(dev, "__emac_calc_base_mr1" NL);
450
451 switch(tx_size) {
452 case 2048:
453 ret |= EMAC_MR1_TFS_2K;
454 break;
455 default:
456 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
457 dev->ndev->name, tx_size);
458 }
459
460 switch(rx_size) {
461 case 16384:
462 ret |= EMAC_MR1_RFS_16K;
463 break;
464 case 4096:
465 ret |= EMAC_MR1_RFS_4K;
466 break;
467 default:
468 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
469 dev->ndev->name, rx_size);
470 }
471
472 return ret;
473 }
474
475 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
476 {
477 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
478 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
479
480 DBG2(dev, "__emac4_calc_base_mr1" NL);
481
482 switch(tx_size) {
483 case 16384:
484 ret |= EMAC4_MR1_TFS_16K;
485 break;
486 case 4096:
487 ret |= EMAC4_MR1_TFS_4K;
488 break;
489 case 2048:
490 ret |= EMAC4_MR1_TFS_2K;
491 break;
492 default:
493 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
494 dev->ndev->name, tx_size);
495 }
496
497 switch(rx_size) {
498 case 16384:
499 ret |= EMAC4_MR1_RFS_16K;
500 break;
501 case 4096:
502 ret |= EMAC4_MR1_RFS_4K;
503 break;
504 case 2048:
505 ret |= EMAC4_MR1_RFS_2K;
506 break;
507 default:
508 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
509 dev->ndev->name, rx_size);
510 }
511
512 return ret;
513 }
514
515 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
516 {
517 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
518 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
519 __emac_calc_base_mr1(dev, tx_size, rx_size);
520 }
521
522 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
523 {
524 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
525 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
526 else
527 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
528 }
529
530 static inline u32 emac_calc_rwmr(struct emac_instance *dev,
531 unsigned int low, unsigned int high)
532 {
533 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
534 return (low << 22) | ( (high & 0x3ff) << 6);
535 else
536 return (low << 23) | ( (high & 0x1ff) << 7);
537 }
538
539 static int emac_configure(struct emac_instance *dev)
540 {
541 struct emac_regs __iomem *p = dev->emacp;
542 struct net_device *ndev = dev->ndev;
543 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
544 u32 r, mr1 = 0;
545
546 DBG(dev, "configure" NL);
547
548 if (!link) {
549 out_be32(&p->mr1, in_be32(&p->mr1)
550 | EMAC_MR1_FDE | EMAC_MR1_ILE);
551 udelay(100);
552 } else if (emac_reset(dev) < 0)
553 return -ETIMEDOUT;
554
555 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
556 tah_reset(dev->tah_dev);
557
558 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
559 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
560
561 /* Default fifo sizes */
562 tx_size = dev->tx_fifo_size;
563 rx_size = dev->rx_fifo_size;
564
565 /* No link, force loopback */
566 if (!link)
567 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
568
569 /* Check for full duplex */
570 else if (dev->phy.duplex == DUPLEX_FULL)
571 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
572
573 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
574 dev->stop_timeout = STOP_TIMEOUT_10;
575 switch (dev->phy.speed) {
576 case SPEED_1000:
577 if (emac_phy_gpcs(dev->phy.mode)) {
578 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
579 (dev->phy.gpcs_address != 0xffffffff) ?
580 dev->phy.gpcs_address : dev->phy.address);
581
582 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
583 * identify this GPCS PHY later.
584 */
585 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
586 } else
587 mr1 |= EMAC_MR1_MF_1000;
588
589 /* Extended fifo sizes */
590 tx_size = dev->tx_fifo_size_gige;
591 rx_size = dev->rx_fifo_size_gige;
592
593 if (dev->ndev->mtu > ETH_DATA_LEN) {
594 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
595 mr1 |= EMAC4_MR1_JPSM;
596 else
597 mr1 |= EMAC_MR1_JPSM;
598 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
599 } else
600 dev->stop_timeout = STOP_TIMEOUT_1000;
601 break;
602 case SPEED_100:
603 mr1 |= EMAC_MR1_MF_100;
604 dev->stop_timeout = STOP_TIMEOUT_100;
605 break;
606 default: /* make gcc happy */
607 break;
608 }
609
610 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
611 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
612 dev->phy.speed);
613 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
614 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
615
616 /* on 40x erratum forces us to NOT use integrated flow control,
617 * let's hope it works on 44x ;)
618 */
619 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
620 dev->phy.duplex == DUPLEX_FULL) {
621 if (dev->phy.pause)
622 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
623 else if (dev->phy.asym_pause)
624 mr1 |= EMAC_MR1_APP;
625 }
626
627 /* Add base settings & fifo sizes & program MR1 */
628 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
629 out_be32(&p->mr1, mr1);
630
631 /* Set individual MAC address */
632 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
633 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
634 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
635 ndev->dev_addr[5]);
636
637 /* VLAN Tag Protocol ID */
638 out_be32(&p->vtpid, 0x8100);
639
640 /* Receive mode register */
641 r = emac_iff2rmr(ndev);
642 if (r & EMAC_RMR_MAE)
643 emac_hash_mc(dev);
644 out_be32(&p->rmr, r);
645
646 /* FIFOs thresholds */
647 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
648 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
649 tx_size / 2 / dev->fifo_entry_size);
650 else
651 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
652 tx_size / 2 / dev->fifo_entry_size);
653 out_be32(&p->tmr1, r);
654 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
655
656 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
657 there should be still enough space in FIFO to allow the our link
658 partner time to process this frame and also time to send PAUSE
659 frame itself.
660
661 Here is the worst case scenario for the RX FIFO "headroom"
662 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
663
664 1) One maximum-length frame on TX 1522 bytes
665 2) One PAUSE frame time 64 bytes
666 3) PAUSE frame decode time allowance 64 bytes
667 4) One maximum-length frame on RX 1522 bytes
668 5) Round-trip propagation delay of the link (100Mb) 15 bytes
669 ----------
670 3187 bytes
671
672 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
673 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
674 */
675 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
676 rx_size / 4 / dev->fifo_entry_size);
677 out_be32(&p->rwmr, r);
678
679 /* Set PAUSE timer to the maximum */
680 out_be32(&p->ptr, 0xffff);
681
682 /* IRQ sources */
683 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
684 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
685 EMAC_ISR_IRE | EMAC_ISR_TE;
686 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
687 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
688 EMAC4_ISR_RXOE | */;
689 out_be32(&p->iser, r);
690
691 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
692 if (emac_phy_gpcs(dev->phy.mode)) {
693 if (dev->phy.gpcs_address != 0xffffffff)
694 emac_mii_reset_gpcs(&dev->phy);
695 else
696 emac_mii_reset_phy(&dev->phy);
697 }
698
699 return 0;
700 }
701
702 static void emac_reinitialize(struct emac_instance *dev)
703 {
704 DBG(dev, "reinitialize" NL);
705
706 emac_netif_stop(dev);
707 if (!emac_configure(dev)) {
708 emac_tx_enable(dev);
709 emac_rx_enable(dev);
710 }
711 emac_netif_start(dev);
712 }
713
714 static void emac_full_tx_reset(struct emac_instance *dev)
715 {
716 DBG(dev, "full_tx_reset" NL);
717
718 emac_tx_disable(dev);
719 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
720 emac_clean_tx_ring(dev);
721 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
722
723 emac_configure(dev);
724
725 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
726 emac_tx_enable(dev);
727 emac_rx_enable(dev);
728 }
729
730 static void emac_reset_work(struct work_struct *work)
731 {
732 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
733
734 DBG(dev, "reset_work" NL);
735
736 mutex_lock(&dev->link_lock);
737 if (dev->opened) {
738 emac_netif_stop(dev);
739 emac_full_tx_reset(dev);
740 emac_netif_start(dev);
741 }
742 mutex_unlock(&dev->link_lock);
743 }
744
745 static void emac_tx_timeout(struct net_device *ndev)
746 {
747 struct emac_instance *dev = netdev_priv(ndev);
748
749 DBG(dev, "tx_timeout" NL);
750
751 schedule_work(&dev->reset_work);
752 }
753
754
755 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
756 {
757 int done = !!(stacr & EMAC_STACR_OC);
758
759 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
760 done = !done;
761
762 return done;
763 };
764
765 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
766 {
767 struct emac_regs __iomem *p = dev->emacp;
768 u32 r = 0;
769 int n, err = -ETIMEDOUT;
770
771 mutex_lock(&dev->mdio_lock);
772
773 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
774
775 /* Enable proper MDIO port */
776 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
777 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
778 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
779 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
780
781 /* Wait for management interface to become idle */
782 n = 20;
783 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
784 udelay(1);
785 if (!--n) {
786 DBG2(dev, " -> timeout wait idle\n");
787 goto bail;
788 }
789 }
790
791 /* Issue read command */
792 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
793 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
794 else
795 r = EMAC_STACR_BASE(dev->opb_bus_freq);
796 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
797 r |= EMAC_STACR_OC;
798 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
799 r |= EMACX_STACR_STAC_READ;
800 else
801 r |= EMAC_STACR_STAC_READ;
802 r |= (reg & EMAC_STACR_PRA_MASK)
803 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
804 out_be32(&p->stacr, r);
805
806 /* Wait for read to complete */
807 n = 200;
808 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
809 udelay(1);
810 if (!--n) {
811 DBG2(dev, " -> timeout wait complete\n");
812 goto bail;
813 }
814 }
815
816 if (unlikely(r & EMAC_STACR_PHYE)) {
817 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
818 err = -EREMOTEIO;
819 goto bail;
820 }
821
822 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
823
824 DBG2(dev, "mdio_read -> %04x" NL, r);
825 err = 0;
826 bail:
827 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
828 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
829 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
830 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
831 mutex_unlock(&dev->mdio_lock);
832
833 return err == 0 ? r : err;
834 }
835
836 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
837 u16 val)
838 {
839 struct emac_regs __iomem *p = dev->emacp;
840 u32 r = 0;
841 int n, err = -ETIMEDOUT;
842
843 mutex_lock(&dev->mdio_lock);
844
845 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
846
847 /* Enable proper MDIO port */
848 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
849 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
850 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
851 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
852
853 /* Wait for management interface to be idle */
854 n = 20;
855 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
856 udelay(1);
857 if (!--n) {
858 DBG2(dev, " -> timeout wait idle\n");
859 goto bail;
860 }
861 }
862
863 /* Issue write command */
864 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
865 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
866 else
867 r = EMAC_STACR_BASE(dev->opb_bus_freq);
868 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
869 r |= EMAC_STACR_OC;
870 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
871 r |= EMACX_STACR_STAC_WRITE;
872 else
873 r |= EMAC_STACR_STAC_WRITE;
874 r |= (reg & EMAC_STACR_PRA_MASK) |
875 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
876 (val << EMAC_STACR_PHYD_SHIFT);
877 out_be32(&p->stacr, r);
878
879 /* Wait for write to complete */
880 n = 200;
881 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
882 udelay(1);
883 if (!--n) {
884 DBG2(dev, " -> timeout wait complete\n");
885 goto bail;
886 }
887 }
888 err = 0;
889 bail:
890 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
891 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
892 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
893 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
894 mutex_unlock(&dev->mdio_lock);
895 }
896
897 static int emac_mdio_read(struct net_device *ndev, int id, int reg)
898 {
899 struct emac_instance *dev = netdev_priv(ndev);
900 int res;
901
902 res = __emac_mdio_read((dev->mdio_instance &&
903 dev->phy.gpcs_address != id) ?
904 dev->mdio_instance : dev,
905 (u8) id, (u8) reg);
906 return res;
907 }
908
909 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
910 {
911 struct emac_instance *dev = netdev_priv(ndev);
912
913 __emac_mdio_write((dev->mdio_instance &&
914 dev->phy.gpcs_address != id) ?
915 dev->mdio_instance : dev,
916 (u8) id, (u8) reg, (u16) val);
917 }
918
919 /* Tx lock BH */
920 static void __emac_set_multicast_list(struct emac_instance *dev)
921 {
922 struct emac_regs __iomem *p = dev->emacp;
923 u32 rmr = emac_iff2rmr(dev->ndev);
924
925 DBG(dev, "__multicast %08x" NL, rmr);
926
927 /* I decided to relax register access rules here to avoid
928 * full EMAC reset.
929 *
930 * There is a real problem with EMAC4 core if we use MWSW_001 bit
931 * in MR1 register and do a full EMAC reset.
932 * One TX BD status update is delayed and, after EMAC reset, it
933 * never happens, resulting in TX hung (it'll be recovered by TX
934 * timeout handler eventually, but this is just gross).
935 * So we either have to do full TX reset or try to cheat here :)
936 *
937 * The only required change is to RX mode register, so I *think* all
938 * we need is just to stop RX channel. This seems to work on all
939 * tested SoCs. --ebs
940 *
941 * If we need the full reset, we might just trigger the workqueue
942 * and do it async... a bit nasty but should work --BenH
943 */
944 dev->mcast_pending = 0;
945 emac_rx_disable(dev);
946 if (rmr & EMAC_RMR_MAE)
947 emac_hash_mc(dev);
948 out_be32(&p->rmr, rmr);
949 emac_rx_enable(dev);
950 }
951
952 /* Tx lock BH */
953 static void emac_set_multicast_list(struct net_device *ndev)
954 {
955 struct emac_instance *dev = netdev_priv(ndev);
956
957 DBG(dev, "multicast" NL);
958
959 BUG_ON(!netif_running(dev->ndev));
960
961 if (dev->no_mcast) {
962 dev->mcast_pending = 1;
963 return;
964 }
965 __emac_set_multicast_list(dev);
966 }
967
968 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
969 {
970 int rx_sync_size = emac_rx_sync_size(new_mtu);
971 int rx_skb_size = emac_rx_skb_size(new_mtu);
972 int i, ret = 0;
973 int mr1_jumbo_bit_change = 0;
974
975 mutex_lock(&dev->link_lock);
976 emac_netif_stop(dev);
977 emac_rx_disable(dev);
978 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
979
980 if (dev->rx_sg_skb) {
981 ++dev->estats.rx_dropped_resize;
982 dev_kfree_skb(dev->rx_sg_skb);
983 dev->rx_sg_skb = NULL;
984 }
985
986 /* Make a first pass over RX ring and mark BDs ready, dropping
987 * non-processed packets on the way. We need this as a separate pass
988 * to simplify error recovery in the case of allocation failure later.
989 */
990 for (i = 0; i < NUM_RX_BUFF; ++i) {
991 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
992 ++dev->estats.rx_dropped_resize;
993
994 dev->rx_desc[i].data_len = 0;
995 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
996 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
997 }
998
999 /* Reallocate RX ring only if bigger skb buffers are required */
1000 if (rx_skb_size <= dev->rx_skb_size)
1001 goto skip;
1002
1003 /* Second pass, allocate new skbs */
1004 for (i = 0; i < NUM_RX_BUFF; ++i) {
1005 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
1006 if (!skb) {
1007 ret = -ENOMEM;
1008 goto oom;
1009 }
1010
1011 BUG_ON(!dev->rx_skb[i]);
1012 dev_kfree_skb(dev->rx_skb[i]);
1013
1014 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1015 dev->rx_desc[i].data_ptr =
1016 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1017 DMA_FROM_DEVICE) + 2;
1018 dev->rx_skb[i] = skb;
1019 }
1020 skip:
1021 /* Check if we need to change "Jumbo" bit in MR1 */
1022 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
1023 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
1024 (dev->ndev->mtu > ETH_DATA_LEN);
1025 } else {
1026 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
1027 (dev->ndev->mtu > ETH_DATA_LEN);
1028 }
1029
1030 if (mr1_jumbo_bit_change) {
1031 /* This is to prevent starting RX channel in emac_rx_enable() */
1032 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1033
1034 dev->ndev->mtu = new_mtu;
1035 emac_full_tx_reset(dev);
1036 }
1037
1038 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1039 oom:
1040 /* Restart RX */
1041 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1042 dev->rx_slot = 0;
1043 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1044 emac_rx_enable(dev);
1045 emac_netif_start(dev);
1046 mutex_unlock(&dev->link_lock);
1047
1048 return ret;
1049 }
1050
1051 /* Process ctx, rtnl_lock semaphore */
1052 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1053 {
1054 struct emac_instance *dev = netdev_priv(ndev);
1055 int ret = 0;
1056
1057 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1058 return -EINVAL;
1059
1060 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1061
1062 if (netif_running(ndev)) {
1063 /* Check if we really need to reinitialize RX ring */
1064 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1065 ret = emac_resize_rx_ring(dev, new_mtu);
1066 }
1067
1068 if (!ret) {
1069 ndev->mtu = new_mtu;
1070 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1071 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1072 }
1073
1074 return ret;
1075 }
1076
1077 static void emac_clean_tx_ring(struct emac_instance *dev)
1078 {
1079 int i;
1080
1081 for (i = 0; i < NUM_TX_BUFF; ++i) {
1082 if (dev->tx_skb[i]) {
1083 dev_kfree_skb(dev->tx_skb[i]);
1084 dev->tx_skb[i] = NULL;
1085 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1086 ++dev->estats.tx_dropped;
1087 }
1088 dev->tx_desc[i].ctrl = 0;
1089 dev->tx_desc[i].data_ptr = 0;
1090 }
1091 }
1092
1093 static void emac_clean_rx_ring(struct emac_instance *dev)
1094 {
1095 int i;
1096
1097 for (i = 0; i < NUM_RX_BUFF; ++i)
1098 if (dev->rx_skb[i]) {
1099 dev->rx_desc[i].ctrl = 0;
1100 dev_kfree_skb(dev->rx_skb[i]);
1101 dev->rx_skb[i] = NULL;
1102 dev->rx_desc[i].data_ptr = 0;
1103 }
1104
1105 if (dev->rx_sg_skb) {
1106 dev_kfree_skb(dev->rx_sg_skb);
1107 dev->rx_sg_skb = NULL;
1108 }
1109 }
1110
1111 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1112 gfp_t flags)
1113 {
1114 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1115 if (unlikely(!skb))
1116 return -ENOMEM;
1117
1118 dev->rx_skb[slot] = skb;
1119 dev->rx_desc[slot].data_len = 0;
1120
1121 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1122 dev->rx_desc[slot].data_ptr =
1123 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1124 DMA_FROM_DEVICE) + 2;
1125 wmb();
1126 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1127 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1128
1129 return 0;
1130 }
1131
1132 static void emac_print_link_status(struct emac_instance *dev)
1133 {
1134 if (netif_carrier_ok(dev->ndev))
1135 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1136 dev->ndev->name, dev->phy.speed,
1137 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1138 dev->phy.pause ? ", pause enabled" :
1139 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1140 else
1141 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1142 }
1143
1144 /* Process ctx, rtnl_lock semaphore */
1145 static int emac_open(struct net_device *ndev)
1146 {
1147 struct emac_instance *dev = netdev_priv(ndev);
1148 int err, i;
1149
1150 DBG(dev, "open" NL);
1151
1152 /* Setup error IRQ handler */
1153 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1154 if (err) {
1155 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1156 ndev->name, dev->emac_irq);
1157 return err;
1158 }
1159
1160 /* Allocate RX ring */
1161 for (i = 0; i < NUM_RX_BUFF; ++i)
1162 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1163 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1164 ndev->name);
1165 goto oom;
1166 }
1167
1168 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1169 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1170 dev->rx_sg_skb = NULL;
1171
1172 mutex_lock(&dev->link_lock);
1173 dev->opened = 1;
1174
1175 /* Start PHY polling now.
1176 */
1177 if (dev->phy.address >= 0) {
1178 int link_poll_interval;
1179 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1180 dev->phy.def->ops->read_link(&dev->phy);
1181 emac_rx_clk_default(dev);
1182 netif_carrier_on(dev->ndev);
1183 link_poll_interval = PHY_POLL_LINK_ON;
1184 } else {
1185 emac_rx_clk_tx(dev);
1186 netif_carrier_off(dev->ndev);
1187 link_poll_interval = PHY_POLL_LINK_OFF;
1188 }
1189 dev->link_polling = 1;
1190 wmb();
1191 schedule_delayed_work(&dev->link_work, link_poll_interval);
1192 emac_print_link_status(dev);
1193 } else
1194 netif_carrier_on(dev->ndev);
1195
1196 /* Required for Pause packet support in EMAC */
1197 dev_mc_add_global(ndev, default_mcast_addr);
1198
1199 emac_configure(dev);
1200 mal_poll_add(dev->mal, &dev->commac);
1201 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1202 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1203 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1204 emac_tx_enable(dev);
1205 emac_rx_enable(dev);
1206 emac_netif_start(dev);
1207
1208 mutex_unlock(&dev->link_lock);
1209
1210 return 0;
1211 oom:
1212 emac_clean_rx_ring(dev);
1213 free_irq(dev->emac_irq, dev);
1214
1215 return -ENOMEM;
1216 }
1217
1218 /* BHs disabled */
1219 #if 0
1220 static int emac_link_differs(struct emac_instance *dev)
1221 {
1222 u32 r = in_be32(&dev->emacp->mr1);
1223
1224 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1225 int speed, pause, asym_pause;
1226
1227 if (r & EMAC_MR1_MF_1000)
1228 speed = SPEED_1000;
1229 else if (r & EMAC_MR1_MF_100)
1230 speed = SPEED_100;
1231 else
1232 speed = SPEED_10;
1233
1234 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1235 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1236 pause = 1;
1237 asym_pause = 0;
1238 break;
1239 case EMAC_MR1_APP:
1240 pause = 0;
1241 asym_pause = 1;
1242 break;
1243 default:
1244 pause = asym_pause = 0;
1245 }
1246 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1247 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1248 }
1249 #endif
1250
1251 static void emac_link_timer(struct work_struct *work)
1252 {
1253 struct emac_instance *dev =
1254 container_of(to_delayed_work(work),
1255 struct emac_instance, link_work);
1256 int link_poll_interval;
1257
1258 mutex_lock(&dev->link_lock);
1259 DBG2(dev, "link timer" NL);
1260
1261 if (!dev->opened)
1262 goto bail;
1263
1264 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1265 if (!netif_carrier_ok(dev->ndev)) {
1266 emac_rx_clk_default(dev);
1267 /* Get new link parameters */
1268 dev->phy.def->ops->read_link(&dev->phy);
1269
1270 netif_carrier_on(dev->ndev);
1271 emac_netif_stop(dev);
1272 emac_full_tx_reset(dev);
1273 emac_netif_start(dev);
1274 emac_print_link_status(dev);
1275 }
1276 link_poll_interval = PHY_POLL_LINK_ON;
1277 } else {
1278 if (netif_carrier_ok(dev->ndev)) {
1279 emac_rx_clk_tx(dev);
1280 netif_carrier_off(dev->ndev);
1281 netif_tx_disable(dev->ndev);
1282 emac_reinitialize(dev);
1283 emac_print_link_status(dev);
1284 }
1285 link_poll_interval = PHY_POLL_LINK_OFF;
1286 }
1287 schedule_delayed_work(&dev->link_work, link_poll_interval);
1288 bail:
1289 mutex_unlock(&dev->link_lock);
1290 }
1291
1292 static void emac_force_link_update(struct emac_instance *dev)
1293 {
1294 netif_carrier_off(dev->ndev);
1295 smp_rmb();
1296 if (dev->link_polling) {
1297 cancel_delayed_work_sync(&dev->link_work);
1298 if (dev->link_polling)
1299 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1300 }
1301 }
1302
1303 /* Process ctx, rtnl_lock semaphore */
1304 static int emac_close(struct net_device *ndev)
1305 {
1306 struct emac_instance *dev = netdev_priv(ndev);
1307
1308 DBG(dev, "close" NL);
1309
1310 if (dev->phy.address >= 0) {
1311 dev->link_polling = 0;
1312 cancel_delayed_work_sync(&dev->link_work);
1313 }
1314 mutex_lock(&dev->link_lock);
1315 emac_netif_stop(dev);
1316 dev->opened = 0;
1317 mutex_unlock(&dev->link_lock);
1318
1319 emac_rx_disable(dev);
1320 emac_tx_disable(dev);
1321 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1322 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1323 mal_poll_del(dev->mal, &dev->commac);
1324
1325 emac_clean_tx_ring(dev);
1326 emac_clean_rx_ring(dev);
1327
1328 free_irq(dev->emac_irq, dev);
1329
1330 netif_carrier_off(ndev);
1331
1332 return 0;
1333 }
1334
1335 static inline u16 emac_tx_csum(struct emac_instance *dev,
1336 struct sk_buff *skb)
1337 {
1338 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1339 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1340 ++dev->stats.tx_packets_csum;
1341 return EMAC_TX_CTRL_TAH_CSUM;
1342 }
1343 return 0;
1344 }
1345
1346 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1347 {
1348 struct emac_regs __iomem *p = dev->emacp;
1349 struct net_device *ndev = dev->ndev;
1350
1351 /* Send the packet out. If the if makes a significant perf
1352 * difference, then we can store the TMR0 value in "dev"
1353 * instead
1354 */
1355 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1356 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1357 else
1358 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1359
1360 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1361 netif_stop_queue(ndev);
1362 DBG2(dev, "stopped TX queue" NL);
1363 }
1364
1365 ndev->trans_start = jiffies;
1366 ++dev->stats.tx_packets;
1367 dev->stats.tx_bytes += len;
1368
1369 return NETDEV_TX_OK;
1370 }
1371
1372 /* Tx lock BH */
1373 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1374 {
1375 struct emac_instance *dev = netdev_priv(ndev);
1376 unsigned int len = skb->len;
1377 int slot;
1378
1379 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1380 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1381
1382 slot = dev->tx_slot++;
1383 if (dev->tx_slot == NUM_TX_BUFF) {
1384 dev->tx_slot = 0;
1385 ctrl |= MAL_TX_CTRL_WRAP;
1386 }
1387
1388 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1389
1390 dev->tx_skb[slot] = skb;
1391 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1392 skb->data, len,
1393 DMA_TO_DEVICE);
1394 dev->tx_desc[slot].data_len = (u16) len;
1395 wmb();
1396 dev->tx_desc[slot].ctrl = ctrl;
1397
1398 return emac_xmit_finish(dev, len);
1399 }
1400
1401 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1402 u32 pd, int len, int last, u16 base_ctrl)
1403 {
1404 while (1) {
1405 u16 ctrl = base_ctrl;
1406 int chunk = min(len, MAL_MAX_TX_SIZE);
1407 len -= chunk;
1408
1409 slot = (slot + 1) % NUM_TX_BUFF;
1410
1411 if (last && !len)
1412 ctrl |= MAL_TX_CTRL_LAST;
1413 if (slot == NUM_TX_BUFF - 1)
1414 ctrl |= MAL_TX_CTRL_WRAP;
1415
1416 dev->tx_skb[slot] = NULL;
1417 dev->tx_desc[slot].data_ptr = pd;
1418 dev->tx_desc[slot].data_len = (u16) chunk;
1419 dev->tx_desc[slot].ctrl = ctrl;
1420 ++dev->tx_cnt;
1421
1422 if (!len)
1423 break;
1424
1425 pd += chunk;
1426 }
1427 return slot;
1428 }
1429
1430 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1431 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1432 {
1433 struct emac_instance *dev = netdev_priv(ndev);
1434 int nr_frags = skb_shinfo(skb)->nr_frags;
1435 int len = skb->len, chunk;
1436 int slot, i;
1437 u16 ctrl;
1438 u32 pd;
1439
1440 /* This is common "fast" path */
1441 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1442 return emac_start_xmit(skb, ndev);
1443
1444 len -= skb->data_len;
1445
1446 /* Note, this is only an *estimation*, we can still run out of empty
1447 * slots because of the additional fragmentation into
1448 * MAL_MAX_TX_SIZE-sized chunks
1449 */
1450 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1451 goto stop_queue;
1452
1453 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1454 emac_tx_csum(dev, skb);
1455 slot = dev->tx_slot;
1456
1457 /* skb data */
1458 dev->tx_skb[slot] = NULL;
1459 chunk = min(len, MAL_MAX_TX_SIZE);
1460 dev->tx_desc[slot].data_ptr = pd =
1461 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1462 dev->tx_desc[slot].data_len = (u16) chunk;
1463 len -= chunk;
1464 if (unlikely(len))
1465 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1466 ctrl);
1467 /* skb fragments */
1468 for (i = 0; i < nr_frags; ++i) {
1469 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1470 len = skb_frag_size(frag);
1471
1472 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1473 goto undo_frame;
1474
1475 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1476 DMA_TO_DEVICE);
1477
1478 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1479 ctrl);
1480 }
1481
1482 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1483
1484 /* Attach skb to the last slot so we don't release it too early */
1485 dev->tx_skb[slot] = skb;
1486
1487 /* Send the packet out */
1488 if (dev->tx_slot == NUM_TX_BUFF - 1)
1489 ctrl |= MAL_TX_CTRL_WRAP;
1490 wmb();
1491 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1492 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1493
1494 return emac_xmit_finish(dev, skb->len);
1495
1496 undo_frame:
1497 /* Well, too bad. Our previous estimation was overly optimistic.
1498 * Undo everything.
1499 */
1500 while (slot != dev->tx_slot) {
1501 dev->tx_desc[slot].ctrl = 0;
1502 --dev->tx_cnt;
1503 if (--slot < 0)
1504 slot = NUM_TX_BUFF - 1;
1505 }
1506 ++dev->estats.tx_undo;
1507
1508 stop_queue:
1509 netif_stop_queue(ndev);
1510 DBG2(dev, "stopped TX queue" NL);
1511 return NETDEV_TX_BUSY;
1512 }
1513
1514 /* Tx lock BHs */
1515 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1516 {
1517 struct emac_error_stats *st = &dev->estats;
1518
1519 DBG(dev, "BD TX error %04x" NL, ctrl);
1520
1521 ++st->tx_bd_errors;
1522 if (ctrl & EMAC_TX_ST_BFCS)
1523 ++st->tx_bd_bad_fcs;
1524 if (ctrl & EMAC_TX_ST_LCS)
1525 ++st->tx_bd_carrier_loss;
1526 if (ctrl & EMAC_TX_ST_ED)
1527 ++st->tx_bd_excessive_deferral;
1528 if (ctrl & EMAC_TX_ST_EC)
1529 ++st->tx_bd_excessive_collisions;
1530 if (ctrl & EMAC_TX_ST_LC)
1531 ++st->tx_bd_late_collision;
1532 if (ctrl & EMAC_TX_ST_MC)
1533 ++st->tx_bd_multple_collisions;
1534 if (ctrl & EMAC_TX_ST_SC)
1535 ++st->tx_bd_single_collision;
1536 if (ctrl & EMAC_TX_ST_UR)
1537 ++st->tx_bd_underrun;
1538 if (ctrl & EMAC_TX_ST_SQE)
1539 ++st->tx_bd_sqe;
1540 }
1541
1542 static void emac_poll_tx(void *param)
1543 {
1544 struct emac_instance *dev = param;
1545 u32 bad_mask;
1546
1547 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1548
1549 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1550 bad_mask = EMAC_IS_BAD_TX_TAH;
1551 else
1552 bad_mask = EMAC_IS_BAD_TX;
1553
1554 netif_tx_lock_bh(dev->ndev);
1555 if (dev->tx_cnt) {
1556 u16 ctrl;
1557 int slot = dev->ack_slot, n = 0;
1558 again:
1559 ctrl = dev->tx_desc[slot].ctrl;
1560 if (!(ctrl & MAL_TX_CTRL_READY)) {
1561 struct sk_buff *skb = dev->tx_skb[slot];
1562 ++n;
1563
1564 if (skb) {
1565 dev_kfree_skb(skb);
1566 dev->tx_skb[slot] = NULL;
1567 }
1568 slot = (slot + 1) % NUM_TX_BUFF;
1569
1570 if (unlikely(ctrl & bad_mask))
1571 emac_parse_tx_error(dev, ctrl);
1572
1573 if (--dev->tx_cnt)
1574 goto again;
1575 }
1576 if (n) {
1577 dev->ack_slot = slot;
1578 if (netif_queue_stopped(dev->ndev) &&
1579 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1580 netif_wake_queue(dev->ndev);
1581
1582 DBG2(dev, "tx %d pkts" NL, n);
1583 }
1584 }
1585 netif_tx_unlock_bh(dev->ndev);
1586 }
1587
1588 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1589 int len)
1590 {
1591 struct sk_buff *skb = dev->rx_skb[slot];
1592
1593 DBG2(dev, "recycle %d %d" NL, slot, len);
1594
1595 if (len)
1596 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1597 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1598
1599 dev->rx_desc[slot].data_len = 0;
1600 wmb();
1601 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1602 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1603 }
1604
1605 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1606 {
1607 struct emac_error_stats *st = &dev->estats;
1608
1609 DBG(dev, "BD RX error %04x" NL, ctrl);
1610
1611 ++st->rx_bd_errors;
1612 if (ctrl & EMAC_RX_ST_OE)
1613 ++st->rx_bd_overrun;
1614 if (ctrl & EMAC_RX_ST_BP)
1615 ++st->rx_bd_bad_packet;
1616 if (ctrl & EMAC_RX_ST_RP)
1617 ++st->rx_bd_runt_packet;
1618 if (ctrl & EMAC_RX_ST_SE)
1619 ++st->rx_bd_short_event;
1620 if (ctrl & EMAC_RX_ST_AE)
1621 ++st->rx_bd_alignment_error;
1622 if (ctrl & EMAC_RX_ST_BFCS)
1623 ++st->rx_bd_bad_fcs;
1624 if (ctrl & EMAC_RX_ST_PTL)
1625 ++st->rx_bd_packet_too_long;
1626 if (ctrl & EMAC_RX_ST_ORE)
1627 ++st->rx_bd_out_of_range;
1628 if (ctrl & EMAC_RX_ST_IRE)
1629 ++st->rx_bd_in_range;
1630 }
1631
1632 static inline void emac_rx_csum(struct emac_instance *dev,
1633 struct sk_buff *skb, u16 ctrl)
1634 {
1635 #ifdef CONFIG_IBM_EMAC_TAH
1636 if (!ctrl && dev->tah_dev) {
1637 skb->ip_summed = CHECKSUM_UNNECESSARY;
1638 ++dev->stats.rx_packets_csum;
1639 }
1640 #endif
1641 }
1642
1643 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1644 {
1645 if (likely(dev->rx_sg_skb != NULL)) {
1646 int len = dev->rx_desc[slot].data_len;
1647 int tot_len = dev->rx_sg_skb->len + len;
1648
1649 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1650 ++dev->estats.rx_dropped_mtu;
1651 dev_kfree_skb(dev->rx_sg_skb);
1652 dev->rx_sg_skb = NULL;
1653 } else {
1654 cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
1655 dev->rx_skb[slot]->data, len);
1656 skb_put(dev->rx_sg_skb, len);
1657 emac_recycle_rx_skb(dev, slot, len);
1658 return 0;
1659 }
1660 }
1661 emac_recycle_rx_skb(dev, slot, 0);
1662 return -1;
1663 }
1664
1665 /* NAPI poll context */
1666 static int emac_poll_rx(void *param, int budget)
1667 {
1668 struct emac_instance *dev = param;
1669 int slot = dev->rx_slot, received = 0;
1670
1671 DBG2(dev, "poll_rx(%d)" NL, budget);
1672
1673 again:
1674 while (budget > 0) {
1675 int len;
1676 struct sk_buff *skb;
1677 u16 ctrl = dev->rx_desc[slot].ctrl;
1678
1679 if (ctrl & MAL_RX_CTRL_EMPTY)
1680 break;
1681
1682 skb = dev->rx_skb[slot];
1683 mb();
1684 len = dev->rx_desc[slot].data_len;
1685
1686 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1687 goto sg;
1688
1689 ctrl &= EMAC_BAD_RX_MASK;
1690 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1691 emac_parse_rx_error(dev, ctrl);
1692 ++dev->estats.rx_dropped_error;
1693 emac_recycle_rx_skb(dev, slot, 0);
1694 len = 0;
1695 goto next;
1696 }
1697
1698 if (len < ETH_HLEN) {
1699 ++dev->estats.rx_dropped_stack;
1700 emac_recycle_rx_skb(dev, slot, len);
1701 goto next;
1702 }
1703
1704 if (len && len < EMAC_RX_COPY_THRESH) {
1705 struct sk_buff *copy_skb =
1706 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1707 if (unlikely(!copy_skb))
1708 goto oom;
1709
1710 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1711 cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
1712 len + 2);
1713 emac_recycle_rx_skb(dev, slot, len);
1714 skb = copy_skb;
1715 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1716 goto oom;
1717
1718 skb_put(skb, len);
1719 push_packet:
1720 skb->protocol = eth_type_trans(skb, dev->ndev);
1721 emac_rx_csum(dev, skb, ctrl);
1722
1723 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1724 ++dev->estats.rx_dropped_stack;
1725 next:
1726 ++dev->stats.rx_packets;
1727 skip:
1728 dev->stats.rx_bytes += len;
1729 slot = (slot + 1) % NUM_RX_BUFF;
1730 --budget;
1731 ++received;
1732 continue;
1733 sg:
1734 if (ctrl & MAL_RX_CTRL_FIRST) {
1735 BUG_ON(dev->rx_sg_skb);
1736 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1737 DBG(dev, "rx OOM %d" NL, slot);
1738 ++dev->estats.rx_dropped_oom;
1739 emac_recycle_rx_skb(dev, slot, 0);
1740 } else {
1741 dev->rx_sg_skb = skb;
1742 skb_put(skb, len);
1743 }
1744 } else if (!emac_rx_sg_append(dev, slot) &&
1745 (ctrl & MAL_RX_CTRL_LAST)) {
1746
1747 skb = dev->rx_sg_skb;
1748 dev->rx_sg_skb = NULL;
1749
1750 ctrl &= EMAC_BAD_RX_MASK;
1751 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1752 emac_parse_rx_error(dev, ctrl);
1753 ++dev->estats.rx_dropped_error;
1754 dev_kfree_skb(skb);
1755 len = 0;
1756 } else
1757 goto push_packet;
1758 }
1759 goto skip;
1760 oom:
1761 DBG(dev, "rx OOM %d" NL, slot);
1762 /* Drop the packet and recycle skb */
1763 ++dev->estats.rx_dropped_oom;
1764 emac_recycle_rx_skb(dev, slot, 0);
1765 goto next;
1766 }
1767
1768 if (received) {
1769 DBG2(dev, "rx %d BDs" NL, received);
1770 dev->rx_slot = slot;
1771 }
1772
1773 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1774 mb();
1775 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1776 DBG2(dev, "rx restart" NL);
1777 received = 0;
1778 goto again;
1779 }
1780
1781 if (dev->rx_sg_skb) {
1782 DBG2(dev, "dropping partial rx packet" NL);
1783 ++dev->estats.rx_dropped_error;
1784 dev_kfree_skb(dev->rx_sg_skb);
1785 dev->rx_sg_skb = NULL;
1786 }
1787
1788 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1789 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1790 emac_rx_enable(dev);
1791 dev->rx_slot = 0;
1792 }
1793 return received;
1794 }
1795
1796 /* NAPI poll context */
1797 static int emac_peek_rx(void *param)
1798 {
1799 struct emac_instance *dev = param;
1800
1801 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1802 }
1803
1804 /* NAPI poll context */
1805 static int emac_peek_rx_sg(void *param)
1806 {
1807 struct emac_instance *dev = param;
1808
1809 int slot = dev->rx_slot;
1810 while (1) {
1811 u16 ctrl = dev->rx_desc[slot].ctrl;
1812 if (ctrl & MAL_RX_CTRL_EMPTY)
1813 return 0;
1814 else if (ctrl & MAL_RX_CTRL_LAST)
1815 return 1;
1816
1817 slot = (slot + 1) % NUM_RX_BUFF;
1818
1819 /* I'm just being paranoid here :) */
1820 if (unlikely(slot == dev->rx_slot))
1821 return 0;
1822 }
1823 }
1824
1825 /* Hard IRQ */
1826 static void emac_rxde(void *param)
1827 {
1828 struct emac_instance *dev = param;
1829
1830 ++dev->estats.rx_stopped;
1831 emac_rx_disable_async(dev);
1832 }
1833
1834 /* Hard IRQ */
1835 static irqreturn_t emac_irq(int irq, void *dev_instance)
1836 {
1837 struct emac_instance *dev = dev_instance;
1838 struct emac_regs __iomem *p = dev->emacp;
1839 struct emac_error_stats *st = &dev->estats;
1840 u32 isr;
1841
1842 spin_lock(&dev->lock);
1843
1844 isr = in_be32(&p->isr);
1845 out_be32(&p->isr, isr);
1846
1847 DBG(dev, "isr = %08x" NL, isr);
1848
1849 if (isr & EMAC4_ISR_TXPE)
1850 ++st->tx_parity;
1851 if (isr & EMAC4_ISR_RXPE)
1852 ++st->rx_parity;
1853 if (isr & EMAC4_ISR_TXUE)
1854 ++st->tx_underrun;
1855 if (isr & EMAC4_ISR_RXOE)
1856 ++st->rx_fifo_overrun;
1857 if (isr & EMAC_ISR_OVR)
1858 ++st->rx_overrun;
1859 if (isr & EMAC_ISR_BP)
1860 ++st->rx_bad_packet;
1861 if (isr & EMAC_ISR_RP)
1862 ++st->rx_runt_packet;
1863 if (isr & EMAC_ISR_SE)
1864 ++st->rx_short_event;
1865 if (isr & EMAC_ISR_ALE)
1866 ++st->rx_alignment_error;
1867 if (isr & EMAC_ISR_BFCS)
1868 ++st->rx_bad_fcs;
1869 if (isr & EMAC_ISR_PTLE)
1870 ++st->rx_packet_too_long;
1871 if (isr & EMAC_ISR_ORE)
1872 ++st->rx_out_of_range;
1873 if (isr & EMAC_ISR_IRE)
1874 ++st->rx_in_range;
1875 if (isr & EMAC_ISR_SQE)
1876 ++st->tx_sqe;
1877 if (isr & EMAC_ISR_TE)
1878 ++st->tx_errors;
1879
1880 spin_unlock(&dev->lock);
1881
1882 return IRQ_HANDLED;
1883 }
1884
1885 static struct net_device_stats *emac_stats(struct net_device *ndev)
1886 {
1887 struct emac_instance *dev = netdev_priv(ndev);
1888 struct emac_stats *st = &dev->stats;
1889 struct emac_error_stats *est = &dev->estats;
1890 struct net_device_stats *nst = &dev->nstats;
1891 unsigned long flags;
1892
1893 DBG2(dev, "stats" NL);
1894
1895 /* Compute "legacy" statistics */
1896 spin_lock_irqsave(&dev->lock, flags);
1897 nst->rx_packets = (unsigned long)st->rx_packets;
1898 nst->rx_bytes = (unsigned long)st->rx_bytes;
1899 nst->tx_packets = (unsigned long)st->tx_packets;
1900 nst->tx_bytes = (unsigned long)st->tx_bytes;
1901 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1902 est->rx_dropped_error +
1903 est->rx_dropped_resize +
1904 est->rx_dropped_mtu);
1905 nst->tx_dropped = (unsigned long)est->tx_dropped;
1906
1907 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1908 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1909 est->rx_fifo_overrun +
1910 est->rx_overrun);
1911 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1912 est->rx_alignment_error);
1913 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1914 est->rx_bad_fcs);
1915 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1916 est->rx_bd_short_event +
1917 est->rx_bd_packet_too_long +
1918 est->rx_bd_out_of_range +
1919 est->rx_bd_in_range +
1920 est->rx_runt_packet +
1921 est->rx_short_event +
1922 est->rx_packet_too_long +
1923 est->rx_out_of_range +
1924 est->rx_in_range);
1925
1926 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1927 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1928 est->tx_underrun);
1929 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1930 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1931 est->tx_bd_excessive_collisions +
1932 est->tx_bd_late_collision +
1933 est->tx_bd_multple_collisions);
1934 spin_unlock_irqrestore(&dev->lock, flags);
1935 return nst;
1936 }
1937
1938 static struct mal_commac_ops emac_commac_ops = {
1939 .poll_tx = &emac_poll_tx,
1940 .poll_rx = &emac_poll_rx,
1941 .peek_rx = &emac_peek_rx,
1942 .rxde = &emac_rxde,
1943 };
1944
1945 static struct mal_commac_ops emac_commac_sg_ops = {
1946 .poll_tx = &emac_poll_tx,
1947 .poll_rx = &emac_poll_rx,
1948 .peek_rx = &emac_peek_rx_sg,
1949 .rxde = &emac_rxde,
1950 };
1951
1952 /* Ethtool support */
1953 static int emac_ethtool_get_settings(struct net_device *ndev,
1954 struct ethtool_cmd *cmd)
1955 {
1956 struct emac_instance *dev = netdev_priv(ndev);
1957
1958 cmd->supported = dev->phy.features;
1959 cmd->port = PORT_MII;
1960 cmd->phy_address = dev->phy.address;
1961 cmd->transceiver =
1962 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
1963
1964 mutex_lock(&dev->link_lock);
1965 cmd->advertising = dev->phy.advertising;
1966 cmd->autoneg = dev->phy.autoneg;
1967 cmd->speed = dev->phy.speed;
1968 cmd->duplex = dev->phy.duplex;
1969 mutex_unlock(&dev->link_lock);
1970
1971 return 0;
1972 }
1973
1974 static int emac_ethtool_set_settings(struct net_device *ndev,
1975 struct ethtool_cmd *cmd)
1976 {
1977 struct emac_instance *dev = netdev_priv(ndev);
1978 u32 f = dev->phy.features;
1979
1980 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
1981 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
1982
1983 /* Basic sanity checks */
1984 if (dev->phy.address < 0)
1985 return -EOPNOTSUPP;
1986 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
1987 return -EINVAL;
1988 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
1989 return -EINVAL;
1990 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
1991 return -EINVAL;
1992
1993 if (cmd->autoneg == AUTONEG_DISABLE) {
1994 switch (cmd->speed) {
1995 case SPEED_10:
1996 if (cmd->duplex == DUPLEX_HALF &&
1997 !(f & SUPPORTED_10baseT_Half))
1998 return -EINVAL;
1999 if (cmd->duplex == DUPLEX_FULL &&
2000 !(f & SUPPORTED_10baseT_Full))
2001 return -EINVAL;
2002 break;
2003 case SPEED_100:
2004 if (cmd->duplex == DUPLEX_HALF &&
2005 !(f & SUPPORTED_100baseT_Half))
2006 return -EINVAL;
2007 if (cmd->duplex == DUPLEX_FULL &&
2008 !(f & SUPPORTED_100baseT_Full))
2009 return -EINVAL;
2010 break;
2011 case SPEED_1000:
2012 if (cmd->duplex == DUPLEX_HALF &&
2013 !(f & SUPPORTED_1000baseT_Half))
2014 return -EINVAL;
2015 if (cmd->duplex == DUPLEX_FULL &&
2016 !(f & SUPPORTED_1000baseT_Full))
2017 return -EINVAL;
2018 break;
2019 default:
2020 return -EINVAL;
2021 }
2022
2023 mutex_lock(&dev->link_lock);
2024 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2025 cmd->duplex);
2026 mutex_unlock(&dev->link_lock);
2027
2028 } else {
2029 if (!(f & SUPPORTED_Autoneg))
2030 return -EINVAL;
2031
2032 mutex_lock(&dev->link_lock);
2033 dev->phy.def->ops->setup_aneg(&dev->phy,
2034 (cmd->advertising & f) |
2035 (dev->phy.advertising &
2036 (ADVERTISED_Pause |
2037 ADVERTISED_Asym_Pause)));
2038 mutex_unlock(&dev->link_lock);
2039 }
2040 emac_force_link_update(dev);
2041
2042 return 0;
2043 }
2044
2045 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2046 struct ethtool_ringparam *rp)
2047 {
2048 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2049 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2050 }
2051
2052 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2053 struct ethtool_pauseparam *pp)
2054 {
2055 struct emac_instance *dev = netdev_priv(ndev);
2056
2057 mutex_lock(&dev->link_lock);
2058 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2059 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2060 pp->autoneg = 1;
2061
2062 if (dev->phy.duplex == DUPLEX_FULL) {
2063 if (dev->phy.pause)
2064 pp->rx_pause = pp->tx_pause = 1;
2065 else if (dev->phy.asym_pause)
2066 pp->tx_pause = 1;
2067 }
2068 mutex_unlock(&dev->link_lock);
2069 }
2070
2071 static int emac_get_regs_len(struct emac_instance *dev)
2072 {
2073 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
2074 return sizeof(struct emac_ethtool_regs_subhdr) +
2075 EMAC4_ETHTOOL_REGS_SIZE(dev);
2076 else
2077 return sizeof(struct emac_ethtool_regs_subhdr) +
2078 EMAC_ETHTOOL_REGS_SIZE(dev);
2079 }
2080
2081 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2082 {
2083 struct emac_instance *dev = netdev_priv(ndev);
2084 int size;
2085
2086 size = sizeof(struct emac_ethtool_regs_hdr) +
2087 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2088 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2089 size += zmii_get_regs_len(dev->zmii_dev);
2090 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2091 size += rgmii_get_regs_len(dev->rgmii_dev);
2092 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2093 size += tah_get_regs_len(dev->tah_dev);
2094
2095 return size;
2096 }
2097
2098 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2099 {
2100 struct emac_ethtool_regs_subhdr *hdr = buf;
2101
2102 hdr->index = dev->cell_index;
2103 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2104 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2105 memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev));
2106 return (void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev);
2107 } else {
2108 hdr->version = EMAC_ETHTOOL_REGS_VER;
2109 memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev));
2110 return (void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev);
2111 }
2112 }
2113
2114 static void emac_ethtool_get_regs(struct net_device *ndev,
2115 struct ethtool_regs *regs, void *buf)
2116 {
2117 struct emac_instance *dev = netdev_priv(ndev);
2118 struct emac_ethtool_regs_hdr *hdr = buf;
2119
2120 hdr->components = 0;
2121 buf = hdr + 1;
2122
2123 buf = mal_dump_regs(dev->mal, buf);
2124 buf = emac_dump_regs(dev, buf);
2125 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2126 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2127 buf = zmii_dump_regs(dev->zmii_dev, buf);
2128 }
2129 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2130 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2131 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2132 }
2133 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2134 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2135 buf = tah_dump_regs(dev->tah_dev, buf);
2136 }
2137 }
2138
2139 static int emac_ethtool_nway_reset(struct net_device *ndev)
2140 {
2141 struct emac_instance *dev = netdev_priv(ndev);
2142 int res = 0;
2143
2144 DBG(dev, "nway_reset" NL);
2145
2146 if (dev->phy.address < 0)
2147 return -EOPNOTSUPP;
2148
2149 mutex_lock(&dev->link_lock);
2150 if (!dev->phy.autoneg) {
2151 res = -EINVAL;
2152 goto out;
2153 }
2154
2155 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2156 out:
2157 mutex_unlock(&dev->link_lock);
2158 emac_force_link_update(dev);
2159 return res;
2160 }
2161
2162 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2163 {
2164 if (stringset == ETH_SS_STATS)
2165 return EMAC_ETHTOOL_STATS_COUNT;
2166 else
2167 return -EINVAL;
2168 }
2169
2170 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2171 u8 * buf)
2172 {
2173 if (stringset == ETH_SS_STATS)
2174 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2175 }
2176
2177 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2178 struct ethtool_stats *estats,
2179 u64 * tmp_stats)
2180 {
2181 struct emac_instance *dev = netdev_priv(ndev);
2182
2183 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2184 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2185 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2186 }
2187
2188 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2189 struct ethtool_drvinfo *info)
2190 {
2191 struct emac_instance *dev = netdev_priv(ndev);
2192
2193 strcpy(info->driver, "ibm_emac");
2194 strcpy(info->version, DRV_VERSION);
2195 info->fw_version[0] = '\0';
2196 sprintf(info->bus_info, "PPC 4xx EMAC-%d %s",
2197 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2198 info->regdump_len = emac_ethtool_get_regs_len(ndev);
2199 }
2200
2201 static const struct ethtool_ops emac_ethtool_ops = {
2202 .get_settings = emac_ethtool_get_settings,
2203 .set_settings = emac_ethtool_set_settings,
2204 .get_drvinfo = emac_ethtool_get_drvinfo,
2205
2206 .get_regs_len = emac_ethtool_get_regs_len,
2207 .get_regs = emac_ethtool_get_regs,
2208
2209 .nway_reset = emac_ethtool_nway_reset,
2210
2211 .get_ringparam = emac_ethtool_get_ringparam,
2212 .get_pauseparam = emac_ethtool_get_pauseparam,
2213
2214 .get_strings = emac_ethtool_get_strings,
2215 .get_sset_count = emac_ethtool_get_sset_count,
2216 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2217
2218 .get_link = ethtool_op_get_link,
2219 };
2220
2221 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2222 {
2223 struct emac_instance *dev = netdev_priv(ndev);
2224 struct mii_ioctl_data *data = if_mii(rq);
2225
2226 DBG(dev, "ioctl %08x" NL, cmd);
2227
2228 if (dev->phy.address < 0)
2229 return -EOPNOTSUPP;
2230
2231 switch (cmd) {
2232 case SIOCGMIIPHY:
2233 data->phy_id = dev->phy.address;
2234 /* Fall through */
2235 case SIOCGMIIREG:
2236 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2237 data->reg_num);
2238 return 0;
2239
2240 case SIOCSMIIREG:
2241 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2242 data->val_in);
2243 return 0;
2244 default:
2245 return -EOPNOTSUPP;
2246 }
2247 }
2248
2249 struct emac_depentry {
2250 u32 phandle;
2251 struct device_node *node;
2252 struct platform_device *ofdev;
2253 void *drvdata;
2254 };
2255
2256 #define EMAC_DEP_MAL_IDX 0
2257 #define EMAC_DEP_ZMII_IDX 1
2258 #define EMAC_DEP_RGMII_IDX 2
2259 #define EMAC_DEP_TAH_IDX 3
2260 #define EMAC_DEP_MDIO_IDX 4
2261 #define EMAC_DEP_PREV_IDX 5
2262 #define EMAC_DEP_COUNT 6
2263
2264 static int __devinit emac_check_deps(struct emac_instance *dev,
2265 struct emac_depentry *deps)
2266 {
2267 int i, there = 0;
2268 struct device_node *np;
2269
2270 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2271 /* no dependency on that item, allright */
2272 if (deps[i].phandle == 0) {
2273 there++;
2274 continue;
2275 }
2276 /* special case for blist as the dependency might go away */
2277 if (i == EMAC_DEP_PREV_IDX) {
2278 np = *(dev->blist - 1);
2279 if (np == NULL) {
2280 deps[i].phandle = 0;
2281 there++;
2282 continue;
2283 }
2284 if (deps[i].node == NULL)
2285 deps[i].node = of_node_get(np);
2286 }
2287 if (deps[i].node == NULL)
2288 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2289 if (deps[i].node == NULL)
2290 continue;
2291 if (deps[i].ofdev == NULL)
2292 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2293 if (deps[i].ofdev == NULL)
2294 continue;
2295 if (deps[i].drvdata == NULL)
2296 deps[i].drvdata = dev_get_drvdata(&deps[i].ofdev->dev);
2297 if (deps[i].drvdata != NULL)
2298 there++;
2299 }
2300 return there == EMAC_DEP_COUNT;
2301 }
2302
2303 static void emac_put_deps(struct emac_instance *dev)
2304 {
2305 if (dev->mal_dev)
2306 of_dev_put(dev->mal_dev);
2307 if (dev->zmii_dev)
2308 of_dev_put(dev->zmii_dev);
2309 if (dev->rgmii_dev)
2310 of_dev_put(dev->rgmii_dev);
2311 if (dev->mdio_dev)
2312 of_dev_put(dev->mdio_dev);
2313 if (dev->tah_dev)
2314 of_dev_put(dev->tah_dev);
2315 }
2316
2317 static int __devinit emac_of_bus_notify(struct notifier_block *nb,
2318 unsigned long action, void *data)
2319 {
2320 /* We are only intereted in device addition */
2321 if (action == BUS_NOTIFY_BOUND_DRIVER)
2322 wake_up_all(&emac_probe_wait);
2323 return 0;
2324 }
2325
2326 static struct notifier_block emac_of_bus_notifier __devinitdata = {
2327 .notifier_call = emac_of_bus_notify
2328 };
2329
2330 static int __devinit emac_wait_deps(struct emac_instance *dev)
2331 {
2332 struct emac_depentry deps[EMAC_DEP_COUNT];
2333 int i, err;
2334
2335 memset(&deps, 0, sizeof(deps));
2336
2337 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2338 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2339 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2340 if (dev->tah_ph)
2341 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2342 if (dev->mdio_ph)
2343 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2344 if (dev->blist && dev->blist > emac_boot_list)
2345 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2346 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2347 wait_event_timeout(emac_probe_wait,
2348 emac_check_deps(dev, deps),
2349 EMAC_PROBE_DEP_TIMEOUT);
2350 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2351 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2352 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2353 if (deps[i].node)
2354 of_node_put(deps[i].node);
2355 if (err && deps[i].ofdev)
2356 of_dev_put(deps[i].ofdev);
2357 }
2358 if (err == 0) {
2359 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2360 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2361 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2362 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2363 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2364 }
2365 if (deps[EMAC_DEP_PREV_IDX].ofdev)
2366 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2367 return err;
2368 }
2369
2370 static int __devinit emac_read_uint_prop(struct device_node *np, const char *name,
2371 u32 *val, int fatal)
2372 {
2373 int len;
2374 const u32 *prop = of_get_property(np, name, &len);
2375 if (prop == NULL || len < sizeof(u32)) {
2376 if (fatal)
2377 printk(KERN_ERR "%s: missing %s property\n",
2378 np->full_name, name);
2379 return -ENODEV;
2380 }
2381 *val = *prop;
2382 return 0;
2383 }
2384
2385 static int __devinit emac_init_phy(struct emac_instance *dev)
2386 {
2387 struct device_node *np = dev->ofdev->dev.of_node;
2388 struct net_device *ndev = dev->ndev;
2389 u32 phy_map, adv;
2390 int i;
2391
2392 dev->phy.dev = ndev;
2393 dev->phy.mode = dev->phy_mode;
2394
2395 /* PHY-less configuration.
2396 * XXX I probably should move these settings to the dev tree
2397 */
2398 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2399 emac_reset(dev);
2400
2401 /* PHY-less configuration.
2402 * XXX I probably should move these settings to the dev tree
2403 */
2404 dev->phy.address = -1;
2405 dev->phy.features = SUPPORTED_MII;
2406 if (emac_phy_supports_gige(dev->phy_mode))
2407 dev->phy.features |= SUPPORTED_1000baseT_Full;
2408 else
2409 dev->phy.features |= SUPPORTED_100baseT_Full;
2410 dev->phy.pause = 1;
2411
2412 return 0;
2413 }
2414
2415 mutex_lock(&emac_phy_map_lock);
2416 phy_map = dev->phy_map | busy_phy_map;
2417
2418 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2419
2420 dev->phy.mdio_read = emac_mdio_read;
2421 dev->phy.mdio_write = emac_mdio_write;
2422
2423 /* Enable internal clock source */
2424 #ifdef CONFIG_PPC_DCR_NATIVE
2425 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2426 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2427 #endif
2428 /* PHY clock workaround */
2429 emac_rx_clk_tx(dev);
2430
2431 /* Enable internal clock source on 440GX*/
2432 #ifdef CONFIG_PPC_DCR_NATIVE
2433 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2434 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2435 #endif
2436 /* Configure EMAC with defaults so we can at least use MDIO
2437 * This is needed mostly for 440GX
2438 */
2439 if (emac_phy_gpcs(dev->phy.mode)) {
2440 /* XXX
2441 * Make GPCS PHY address equal to EMAC index.
2442 * We probably should take into account busy_phy_map
2443 * and/or phy_map here.
2444 *
2445 * Note that the busy_phy_map is currently global
2446 * while it should probably be per-ASIC...
2447 */
2448 dev->phy.gpcs_address = dev->gpcs_address;
2449 if (dev->phy.gpcs_address == 0xffffffff)
2450 dev->phy.address = dev->cell_index;
2451 }
2452
2453 emac_configure(dev);
2454
2455 if (dev->phy_address != 0xffffffff)
2456 phy_map = ~(1 << dev->phy_address);
2457
2458 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2459 if (!(phy_map & 1)) {
2460 int r;
2461 busy_phy_map |= 1 << i;
2462
2463 /* Quick check if there is a PHY at the address */
2464 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2465 if (r == 0xffff || r < 0)
2466 continue;
2467 if (!emac_mii_phy_probe(&dev->phy, i))
2468 break;
2469 }
2470
2471 /* Enable external clock source */
2472 #ifdef CONFIG_PPC_DCR_NATIVE
2473 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2474 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2475 #endif
2476 mutex_unlock(&emac_phy_map_lock);
2477 if (i == 0x20) {
2478 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2479 return -ENXIO;
2480 }
2481
2482 /* Init PHY */
2483 if (dev->phy.def->ops->init)
2484 dev->phy.def->ops->init(&dev->phy);
2485
2486 /* Disable any PHY features not supported by the platform */
2487 dev->phy.def->features &= ~dev->phy_feat_exc;
2488 dev->phy.features &= ~dev->phy_feat_exc;
2489
2490 /* Setup initial link parameters */
2491 if (dev->phy.features & SUPPORTED_Autoneg) {
2492 adv = dev->phy.features;
2493 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2494 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2495 /* Restart autonegotiation */
2496 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2497 } else {
2498 u32 f = dev->phy.def->features;
2499 int speed = SPEED_10, fd = DUPLEX_HALF;
2500
2501 /* Select highest supported speed/duplex */
2502 if (f & SUPPORTED_1000baseT_Full) {
2503 speed = SPEED_1000;
2504 fd = DUPLEX_FULL;
2505 } else if (f & SUPPORTED_1000baseT_Half)
2506 speed = SPEED_1000;
2507 else if (f & SUPPORTED_100baseT_Full) {
2508 speed = SPEED_100;
2509 fd = DUPLEX_FULL;
2510 } else if (f & SUPPORTED_100baseT_Half)
2511 speed = SPEED_100;
2512 else if (f & SUPPORTED_10baseT_Full)
2513 fd = DUPLEX_FULL;
2514
2515 /* Force link parameters */
2516 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2517 }
2518 return 0;
2519 }
2520
2521 static int __devinit emac_init_config(struct emac_instance *dev)
2522 {
2523 struct device_node *np = dev->ofdev->dev.of_node;
2524 const void *p;
2525
2526 /* Read config from device-tree */
2527 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2528 return -ENXIO;
2529 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2530 return -ENXIO;
2531 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2532 return -ENXIO;
2533 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2534 return -ENXIO;
2535 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2536 dev->max_mtu = 1500;
2537 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2538 dev->rx_fifo_size = 2048;
2539 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2540 dev->tx_fifo_size = 2048;
2541 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2542 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2543 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2544 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2545 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2546 dev->phy_address = 0xffffffff;
2547 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2548 dev->phy_map = 0xffffffff;
2549 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2550 dev->gpcs_address = 0xffffffff;
2551 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2552 return -ENXIO;
2553 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2554 dev->tah_ph = 0;
2555 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2556 dev->tah_port = 0;
2557 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2558 dev->mdio_ph = 0;
2559 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2560 dev->zmii_ph = 0;
2561 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2562 dev->zmii_port = 0xffffffff;
2563 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2564 dev->rgmii_ph = 0;
2565 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2566 dev->rgmii_port = 0xffffffff;
2567 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2568 dev->fifo_entry_size = 16;
2569 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2570 dev->mal_burst_size = 256;
2571
2572 /* PHY mode needs some decoding */
2573 dev->phy_mode = of_get_phy_mode(np);
2574 if (dev->phy_mode < 0)
2575 dev->phy_mode = PHY_MODE_NA;
2576
2577 /* Check EMAC version */
2578 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2579 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2580 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2581 of_device_is_compatible(np, "ibm,emac-460gt"))
2582 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2583 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2584 of_device_is_compatible(np, "ibm,emac-405exr"))
2585 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2586 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2587 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2588 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2589 EMAC_FTR_460EX_PHY_CLK_FIX);
2590 }
2591 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2592 dev->features |= EMAC_FTR_EMAC4;
2593 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2594 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2595 } else {
2596 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2597 of_device_is_compatible(np, "ibm,emac-440gr"))
2598 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2599 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2600 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
2601 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2602 #else
2603 printk(KERN_ERR "%s: Flow control not disabled!\n",
2604 np->full_name);
2605 return -ENXIO;
2606 #endif
2607 }
2608
2609 }
2610
2611 /* Fixup some feature bits based on the device tree */
2612 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2613 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2614 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2615 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2616
2617 /* CAB lacks the appropriate properties */
2618 if (of_device_is_compatible(np, "ibm,emac-axon"))
2619 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2620 EMAC_FTR_STACR_OC_INVERT;
2621
2622 /* Enable TAH/ZMII/RGMII features as found */
2623 if (dev->tah_ph != 0) {
2624 #ifdef CONFIG_IBM_EMAC_TAH
2625 dev->features |= EMAC_FTR_HAS_TAH;
2626 #else
2627 printk(KERN_ERR "%s: TAH support not enabled !\n",
2628 np->full_name);
2629 return -ENXIO;
2630 #endif
2631 }
2632
2633 if (dev->zmii_ph != 0) {
2634 #ifdef CONFIG_IBM_EMAC_ZMII
2635 dev->features |= EMAC_FTR_HAS_ZMII;
2636 #else
2637 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2638 np->full_name);
2639 return -ENXIO;
2640 #endif
2641 }
2642
2643 if (dev->rgmii_ph != 0) {
2644 #ifdef CONFIG_IBM_EMAC_RGMII
2645 dev->features |= EMAC_FTR_HAS_RGMII;
2646 #else
2647 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2648 np->full_name);
2649 return -ENXIO;
2650 #endif
2651 }
2652
2653 /* Read MAC-address */
2654 p = of_get_property(np, "local-mac-address", NULL);
2655 if (p == NULL) {
2656 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2657 np->full_name);
2658 return -ENXIO;
2659 }
2660 memcpy(dev->ndev->dev_addr, p, 6);
2661
2662 /* IAHT and GAHT filter parameterization */
2663 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2664 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2665 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2666 } else {
2667 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2668 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2669 }
2670
2671 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2672 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2673 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2674 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2675 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2676
2677 return 0;
2678 }
2679
2680 static const struct net_device_ops emac_netdev_ops = {
2681 .ndo_open = emac_open,
2682 .ndo_stop = emac_close,
2683 .ndo_get_stats = emac_stats,
2684 .ndo_set_rx_mode = emac_set_multicast_list,
2685 .ndo_do_ioctl = emac_ioctl,
2686 .ndo_tx_timeout = emac_tx_timeout,
2687 .ndo_validate_addr = eth_validate_addr,
2688 .ndo_set_mac_address = eth_mac_addr,
2689 .ndo_start_xmit = emac_start_xmit,
2690 .ndo_change_mtu = eth_change_mtu,
2691 };
2692
2693 static const struct net_device_ops emac_gige_netdev_ops = {
2694 .ndo_open = emac_open,
2695 .ndo_stop = emac_close,
2696 .ndo_get_stats = emac_stats,
2697 .ndo_set_rx_mode = emac_set_multicast_list,
2698 .ndo_do_ioctl = emac_ioctl,
2699 .ndo_tx_timeout = emac_tx_timeout,
2700 .ndo_validate_addr = eth_validate_addr,
2701 .ndo_set_mac_address = eth_mac_addr,
2702 .ndo_start_xmit = emac_start_xmit_sg,
2703 .ndo_change_mtu = emac_change_mtu,
2704 };
2705
2706 static int __devinit emac_probe(struct platform_device *ofdev)
2707 {
2708 struct net_device *ndev;
2709 struct emac_instance *dev;
2710 struct device_node *np = ofdev->dev.of_node;
2711 struct device_node **blist = NULL;
2712 int err, i;
2713
2714 /* Skip unused/unwired EMACS. We leave the check for an unused
2715 * property here for now, but new flat device trees should set a
2716 * status property to "disabled" instead.
2717 */
2718 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2719 return -ENODEV;
2720
2721 /* Find ourselves in the bootlist if we are there */
2722 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2723 if (emac_boot_list[i] == np)
2724 blist = &emac_boot_list[i];
2725
2726 /* Allocate our net_device structure */
2727 err = -ENOMEM;
2728 ndev = alloc_etherdev(sizeof(struct emac_instance));
2729 if (!ndev)
2730 goto err_gone;
2731
2732 dev = netdev_priv(ndev);
2733 dev->ndev = ndev;
2734 dev->ofdev = ofdev;
2735 dev->blist = blist;
2736 SET_NETDEV_DEV(ndev, &ofdev->dev);
2737
2738 /* Initialize some embedded data structures */
2739 mutex_init(&dev->mdio_lock);
2740 mutex_init(&dev->link_lock);
2741 spin_lock_init(&dev->lock);
2742 INIT_WORK(&dev->reset_work, emac_reset_work);
2743
2744 /* Init various config data based on device-tree */
2745 err = emac_init_config(dev);
2746 if (err != 0)
2747 goto err_free;
2748
2749 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2750 dev->emac_irq = irq_of_parse_and_map(np, 0);
2751 dev->wol_irq = irq_of_parse_and_map(np, 1);
2752 if (dev->emac_irq == NO_IRQ) {
2753 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2754 goto err_free;
2755 }
2756 ndev->irq = dev->emac_irq;
2757
2758 /* Map EMAC regs */
2759 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2760 printk(KERN_ERR "%s: Can't get registers address\n",
2761 np->full_name);
2762 goto err_irq_unmap;
2763 }
2764 // TODO : request_mem_region
2765 dev->emacp = ioremap(dev->rsrc_regs.start,
2766 resource_size(&dev->rsrc_regs));
2767 if (dev->emacp == NULL) {
2768 printk(KERN_ERR "%s: Can't map device registers!\n",
2769 np->full_name);
2770 err = -ENOMEM;
2771 goto err_irq_unmap;
2772 }
2773
2774 /* Wait for dependent devices */
2775 err = emac_wait_deps(dev);
2776 if (err) {
2777 printk(KERN_ERR
2778 "%s: Timeout waiting for dependent devices\n",
2779 np->full_name);
2780 /* display more info about what's missing ? */
2781 goto err_reg_unmap;
2782 }
2783 dev->mal = dev_get_drvdata(&dev->mal_dev->dev);
2784 if (dev->mdio_dev != NULL)
2785 dev->mdio_instance = dev_get_drvdata(&dev->mdio_dev->dev);
2786
2787 /* Register with MAL */
2788 dev->commac.ops = &emac_commac_ops;
2789 dev->commac.dev = dev;
2790 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2791 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2792 err = mal_register_commac(dev->mal, &dev->commac);
2793 if (err) {
2794 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2795 np->full_name, dev->mal_dev->dev.of_node->full_name);
2796 goto err_rel_deps;
2797 }
2798 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2799 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2800
2801 /* Get pointers to BD rings */
2802 dev->tx_desc =
2803 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2804 dev->rx_desc =
2805 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2806
2807 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2808 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2809
2810 /* Clean rings */
2811 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2812 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2813 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2814 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2815
2816 /* Attach to ZMII, if needed */
2817 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2818 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2819 goto err_unreg_commac;
2820
2821 /* Attach to RGMII, if needed */
2822 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2823 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2824 goto err_detach_zmii;
2825
2826 /* Attach to TAH, if needed */
2827 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2828 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2829 goto err_detach_rgmii;
2830
2831 /* Set some link defaults before we can find out real parameters */
2832 dev->phy.speed = SPEED_100;
2833 dev->phy.duplex = DUPLEX_FULL;
2834 dev->phy.autoneg = AUTONEG_DISABLE;
2835 dev->phy.pause = dev->phy.asym_pause = 0;
2836 dev->stop_timeout = STOP_TIMEOUT_100;
2837 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2838
2839 /* Some SoCs like APM821xx does not support Half Duplex mode. */
2840 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
2841 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
2842 SUPPORTED_100baseT_Half |
2843 SUPPORTED_10baseT_Half);
2844 }
2845
2846 /* Find PHY if any */
2847 err = emac_init_phy(dev);
2848 if (err != 0)
2849 goto err_detach_tah;
2850
2851 if (dev->tah_dev) {
2852 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
2853 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
2854 }
2855 ndev->watchdog_timeo = 5 * HZ;
2856 if (emac_phy_supports_gige(dev->phy_mode)) {
2857 ndev->netdev_ops = &emac_gige_netdev_ops;
2858 dev->commac.ops = &emac_commac_sg_ops;
2859 } else
2860 ndev->netdev_ops = &emac_netdev_ops;
2861 SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
2862
2863 netif_carrier_off(ndev);
2864
2865 err = register_netdev(ndev);
2866 if (err) {
2867 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2868 np->full_name, err);
2869 goto err_detach_tah;
2870 }
2871
2872 /* Set our drvdata last as we don't want them visible until we are
2873 * fully initialized
2874 */
2875 wmb();
2876 dev_set_drvdata(&ofdev->dev, dev);
2877
2878 /* There's a new kid in town ! Let's tell everybody */
2879 wake_up_all(&emac_probe_wait);
2880
2881
2882 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
2883 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
2884
2885 if (dev->phy_mode == PHY_MODE_SGMII)
2886 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2887
2888 if (dev->phy.address >= 0)
2889 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2890 dev->phy.def->name, dev->phy.address);
2891
2892 emac_dbg_register(dev);
2893
2894 /* Life is good */
2895 return 0;
2896
2897 /* I have a bad feeling about this ... */
2898
2899 err_detach_tah:
2900 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2901 tah_detach(dev->tah_dev, dev->tah_port);
2902 err_detach_rgmii:
2903 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2904 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2905 err_detach_zmii:
2906 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2907 zmii_detach(dev->zmii_dev, dev->zmii_port);
2908 err_unreg_commac:
2909 mal_unregister_commac(dev->mal, &dev->commac);
2910 err_rel_deps:
2911 emac_put_deps(dev);
2912 err_reg_unmap:
2913 iounmap(dev->emacp);
2914 err_irq_unmap:
2915 if (dev->wol_irq != NO_IRQ)
2916 irq_dispose_mapping(dev->wol_irq);
2917 if (dev->emac_irq != NO_IRQ)
2918 irq_dispose_mapping(dev->emac_irq);
2919 err_free:
2920 free_netdev(ndev);
2921 err_gone:
2922 /* if we were on the bootlist, remove us as we won't show up and
2923 * wake up all waiters to notify them in case they were waiting
2924 * on us
2925 */
2926 if (blist) {
2927 *blist = NULL;
2928 wake_up_all(&emac_probe_wait);
2929 }
2930 return err;
2931 }
2932
2933 static int __devexit emac_remove(struct platform_device *ofdev)
2934 {
2935 struct emac_instance *dev = dev_get_drvdata(&ofdev->dev);
2936
2937 DBG(dev, "remove" NL);
2938
2939 dev_set_drvdata(&ofdev->dev, NULL);
2940
2941 unregister_netdev(dev->ndev);
2942
2943 cancel_work_sync(&dev->reset_work);
2944
2945 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2946 tah_detach(dev->tah_dev, dev->tah_port);
2947 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2948 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2949 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2950 zmii_detach(dev->zmii_dev, dev->zmii_port);
2951
2952 busy_phy_map &= ~(1 << dev->phy.address);
2953 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
2954
2955 mal_unregister_commac(dev->mal, &dev->commac);
2956 emac_put_deps(dev);
2957
2958 emac_dbg_unregister(dev);
2959 iounmap(dev->emacp);
2960
2961 if (dev->wol_irq != NO_IRQ)
2962 irq_dispose_mapping(dev->wol_irq);
2963 if (dev->emac_irq != NO_IRQ)
2964 irq_dispose_mapping(dev->emac_irq);
2965
2966 free_netdev(dev->ndev);
2967
2968 return 0;
2969 }
2970
2971 /* XXX Features in here should be replaced by properties... */
2972 static struct of_device_id emac_match[] =
2973 {
2974 {
2975 .type = "network",
2976 .compatible = "ibm,emac",
2977 },
2978 {
2979 .type = "network",
2980 .compatible = "ibm,emac4",
2981 },
2982 {
2983 .type = "network",
2984 .compatible = "ibm,emac4sync",
2985 },
2986 {},
2987 };
2988 MODULE_DEVICE_TABLE(of, emac_match);
2989
2990 static struct platform_driver emac_driver = {
2991 .driver = {
2992 .name = "emac",
2993 .owner = THIS_MODULE,
2994 .of_match_table = emac_match,
2995 },
2996 .probe = emac_probe,
2997 .remove = emac_remove,
2998 };
2999
3000 static void __init emac_make_bootlist(void)
3001 {
3002 struct device_node *np = NULL;
3003 int j, max, i = 0, k;
3004 int cell_indices[EMAC_BOOT_LIST_SIZE];
3005
3006 /* Collect EMACs */
3007 while((np = of_find_all_nodes(np)) != NULL) {
3008 const u32 *idx;
3009
3010 if (of_match_node(emac_match, np) == NULL)
3011 continue;
3012 if (of_get_property(np, "unused", NULL))
3013 continue;
3014 idx = of_get_property(np, "cell-index", NULL);
3015 if (idx == NULL)
3016 continue;
3017 cell_indices[i] = *idx;
3018 emac_boot_list[i++] = of_node_get(np);
3019 if (i >= EMAC_BOOT_LIST_SIZE) {
3020 of_node_put(np);
3021 break;
3022 }
3023 }
3024 max = i;
3025
3026 /* Bubble sort them (doh, what a creative algorithm :-) */
3027 for (i = 0; max > 1 && (i < (max - 1)); i++)
3028 for (j = i; j < max; j++) {
3029 if (cell_indices[i] > cell_indices[j]) {
3030 np = emac_boot_list[i];
3031 emac_boot_list[i] = emac_boot_list[j];
3032 emac_boot_list[j] = np;
3033 k = cell_indices[i];
3034 cell_indices[i] = cell_indices[j];
3035 cell_indices[j] = k;
3036 }
3037 }
3038 }
3039
3040 static int __init emac_init(void)
3041 {
3042 int rc;
3043
3044 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3045
3046 /* Init debug stuff */
3047 emac_init_debug();
3048
3049 /* Build EMAC boot list */
3050 emac_make_bootlist();
3051
3052 /* Init submodules */
3053 rc = mal_init();
3054 if (rc)
3055 goto err;
3056 rc = zmii_init();
3057 if (rc)
3058 goto err_mal;
3059 rc = rgmii_init();
3060 if (rc)
3061 goto err_zmii;
3062 rc = tah_init();
3063 if (rc)
3064 goto err_rgmii;
3065 rc = platform_driver_register(&emac_driver);
3066 if (rc)
3067 goto err_tah;
3068
3069 return 0;
3070
3071 err_tah:
3072 tah_exit();
3073 err_rgmii:
3074 rgmii_exit();
3075 err_zmii:
3076 zmii_exit();
3077 err_mal:
3078 mal_exit();
3079 err:
3080 return rc;
3081 }
3082
3083 static void __exit emac_exit(void)
3084 {
3085 int i;
3086
3087 platform_driver_unregister(&emac_driver);
3088
3089 tah_exit();
3090 rgmii_exit();
3091 zmii_exit();
3092 mal_exit();
3093 emac_fini_debug();
3094
3095 /* Destroy EMAC boot list */
3096 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3097 if (emac_boot_list[i])
3098 of_node_put(emac_boot_list[i]);
3099 }
3100
3101 module_init(emac_init);
3102 module_exit(emac_exit);
Linux with added FPC-III support