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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ibm_newemac / core.c
blob385dc3204cb7eefbbaa184f0601267abe7c392ee
1 /*
2 * drivers/net/ibm_newemac/core.c
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller.
5 *
6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
7 * <benh@kernel.crashing.org>
8 *
9 * Based on the arch/ppc version of the driver:
10 *
11 * Copyright (c) 2004, 2005 Zultys Technologies.
12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
13 *
14 * Based on original work by
15 * Matt Porter <mporter@kernel.crashing.org>
16 * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
17 * Armin Kuster <akuster@mvista.com>
18 * Johnnie Peters <jpeters@mvista.com>
19 *
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms of the GNU General Public License as published by the
22 * Free Software Foundation; either version 2 of the License, or (at your
23 * option) any later version.
24 *
25 */
26
27 #include <linux/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/slab.h>
43
44 #include <asm/processor.h>
45 #include <asm/io.h>
46 #include <asm/dma.h>
47 #include <asm/uaccess.h>
48 #include <asm/dcr.h>
49 #include <asm/dcr-regs.h>
50
51 #include "core.h"
52
53 /*
54 * Lack of dma_unmap_???? calls is intentional.
55 *
56 * API-correct usage requires additional support state information to be
57 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
58 * EMAC design (e.g. TX buffer passed from network stack can be split into
59 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
60 * maintaining such information will add additional overhead.
61 * Current DMA API implementation for 4xx processors only ensures cache coherency
62 * and dma_unmap_???? routines are empty and are likely to stay this way.
63 * I decided to omit dma_unmap_??? calls because I don't want to add additional
64 * complexity just for the sake of following some abstract API, when it doesn't
65 * add any real benefit to the driver. I understand that this decision maybe
66 * controversial, but I really tried to make code API-correct and efficient
67 * at the same time and didn't come up with code I liked :(. --ebs
68 */
69
70 #define DRV_NAME "emac"
71 #define DRV_VERSION "3.54"
72 #define DRV_DESC "PPC 4xx OCP EMAC driver"
73
74 MODULE_DESCRIPTION(DRV_DESC);
75 MODULE_AUTHOR
76 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
77 MODULE_LICENSE("GPL");
78
79 /*
80 * PPC64 doesn't (yet) have a cacheable_memcpy
81 */
82 #ifdef CONFIG_PPC64
83 #define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
84 #endif
85
86 /* minimum number of free TX descriptors required to wake up TX process */
87 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
88
89 /* If packet size is less than this number, we allocate small skb and copy packet
90 * contents into it instead of just sending original big skb up
91 */
92 #define EMAC_RX_COPY_THRESH CONFIG_IBM_NEW_EMAC_RX_COPY_THRESHOLD
93
94 /* Since multiple EMACs share MDIO lines in various ways, we need
95 * to avoid re-using the same PHY ID in cases where the arch didn't
96 * setup precise phy_map entries
97 *
98 * XXX This is something that needs to be reworked as we can have multiple
99 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
100 * probably require in that case to have explicit PHY IDs in the device-tree
101 */
102 static u32 busy_phy_map;
103 static DEFINE_MUTEX(emac_phy_map_lock);
104
105 /* This is the wait queue used to wait on any event related to probe, that
106 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
107 */
108 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
109
110 /* Having stable interface names is a doomed idea. However, it would be nice
111 * if we didn't have completely random interface names at boot too :-) It's
112 * just a matter of making everybody's life easier. Since we are doing
113 * threaded probing, it's a bit harder though. The base idea here is that
114 * we make up a list of all emacs in the device-tree before we register the
115 * driver. Every emac will then wait for the previous one in the list to
116 * initialize before itself. We should also keep that list ordered by
117 * cell_index.
118 * That list is only 4 entries long, meaning that additional EMACs don't
119 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
120 */
121
122 #define EMAC_BOOT_LIST_SIZE 4
123 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
124
125 /* How long should I wait for dependent devices ? */
126 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
127
128 /* I don't want to litter system log with timeout errors
129 * when we have brain-damaged PHY.
130 */
131 static inline void emac_report_timeout_error(struct emac_instance *dev,
132 const char *error)
133 {
134 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
135 EMAC_FTR_460EX_PHY_CLK_FIX |
136 EMAC_FTR_440EP_PHY_CLK_FIX))
137 DBG(dev, "%s" NL, error);
138 else if (net_ratelimit())
139 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
140 error);
141 }
142
143 /* EMAC PHY clock workaround:
144 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
145 * which allows controlling each EMAC clock
146 */
147 static inline void emac_rx_clk_tx(struct emac_instance *dev)
148 {
149 #ifdef CONFIG_PPC_DCR_NATIVE
150 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
151 dcri_clrset(SDR0, SDR0_MFR,
152 0, SDR0_MFR_ECS >> dev->cell_index);
153 #endif
154 }
155
156 static inline void emac_rx_clk_default(struct emac_instance *dev)
157 {
158 #ifdef CONFIG_PPC_DCR_NATIVE
159 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
160 dcri_clrset(SDR0, SDR0_MFR,
161 SDR0_MFR_ECS >> dev->cell_index, 0);
162 #endif
163 }
164
165 /* PHY polling intervals */
166 #define PHY_POLL_LINK_ON HZ
167 #define PHY_POLL_LINK_OFF (HZ / 5)
168
169 /* Graceful stop timeouts in us.
170 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
171 */
172 #define STOP_TIMEOUT_10 1230
173 #define STOP_TIMEOUT_100 124
174 #define STOP_TIMEOUT_1000 13
175 #define STOP_TIMEOUT_1000_JUMBO 73
176
177 static unsigned char default_mcast_addr[] = {
178 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
179 };
180
181 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
182 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
183 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
184 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
185 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
186 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
187 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
188 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
189 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
190 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
191 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
192 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
193 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
194 "tx_bd_excessive_collisions", "tx_bd_late_collision",
195 "tx_bd_multple_collisions", "tx_bd_single_collision",
196 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
197 "tx_errors"
198 };
199
200 static irqreturn_t emac_irq(int irq, void *dev_instance);
201 static void emac_clean_tx_ring(struct emac_instance *dev);
202 static void __emac_set_multicast_list(struct emac_instance *dev);
203
204 static inline int emac_phy_supports_gige(int phy_mode)
205 {
206 return phy_mode == PHY_MODE_GMII ||
207 phy_mode == PHY_MODE_RGMII ||
208 phy_mode == PHY_MODE_SGMII ||
209 phy_mode == PHY_MODE_TBI ||
210 phy_mode == PHY_MODE_RTBI;
211 }
212
213 static inline int emac_phy_gpcs(int phy_mode)
214 {
215 return phy_mode == PHY_MODE_SGMII ||
216 phy_mode == PHY_MODE_TBI ||
217 phy_mode == PHY_MODE_RTBI;
218 }
219
220 static inline void emac_tx_enable(struct emac_instance *dev)
221 {
222 struct emac_regs __iomem *p = dev->emacp;
223 u32 r;
224
225 DBG(dev, "tx_enable" NL);
226
227 r = in_be32(&p->mr0);
228 if (!(r & EMAC_MR0_TXE))
229 out_be32(&p->mr0, r | EMAC_MR0_TXE);
230 }
231
232 static void emac_tx_disable(struct emac_instance *dev)
233 {
234 struct emac_regs __iomem *p = dev->emacp;
235 u32 r;
236
237 DBG(dev, "tx_disable" NL);
238
239 r = in_be32(&p->mr0);
240 if (r & EMAC_MR0_TXE) {
241 int n = dev->stop_timeout;
242 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
243 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
244 udelay(1);
245 --n;
246 }
247 if (unlikely(!n))
248 emac_report_timeout_error(dev, "TX disable timeout");
249 }
250 }
251
252 static void emac_rx_enable(struct emac_instance *dev)
253 {
254 struct emac_regs __iomem *p = dev->emacp;
255 u32 r;
256
257 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
258 goto out;
259
260 DBG(dev, "rx_enable" NL);
261
262 r = in_be32(&p->mr0);
263 if (!(r & EMAC_MR0_RXE)) {
264 if (unlikely(!(r & EMAC_MR0_RXI))) {
265 /* Wait if previous async disable is still in progress */
266 int n = dev->stop_timeout;
267 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
268 udelay(1);
269 --n;
270 }
271 if (unlikely(!n))
272 emac_report_timeout_error(dev,
273 "RX disable timeout");
274 }
275 out_be32(&p->mr0, r | EMAC_MR0_RXE);
276 }
277 out:
278 ;
279 }
280
281 static void emac_rx_disable(struct emac_instance *dev)
282 {
283 struct emac_regs __iomem *p = dev->emacp;
284 u32 r;
285
286 DBG(dev, "rx_disable" NL);
287
288 r = in_be32(&p->mr0);
289 if (r & EMAC_MR0_RXE) {
290 int n = dev->stop_timeout;
291 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
292 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
293 udelay(1);
294 --n;
295 }
296 if (unlikely(!n))
297 emac_report_timeout_error(dev, "RX disable timeout");
298 }
299 }
300
301 static inline void emac_netif_stop(struct emac_instance *dev)
302 {
303 netif_tx_lock_bh(dev->ndev);
304 netif_addr_lock(dev->ndev);
305 dev->no_mcast = 1;
306 netif_addr_unlock(dev->ndev);
307 netif_tx_unlock_bh(dev->ndev);
308 dev->ndev->trans_start = jiffies; /* prevent tx timeout */
309 mal_poll_disable(dev->mal, &dev->commac);
310 netif_tx_disable(dev->ndev);
311 }
312
313 static inline void emac_netif_start(struct emac_instance *dev)
314 {
315 netif_tx_lock_bh(dev->ndev);
316 netif_addr_lock(dev->ndev);
317 dev->no_mcast = 0;
318 if (dev->mcast_pending && netif_running(dev->ndev))
319 __emac_set_multicast_list(dev);
320 netif_addr_unlock(dev->ndev);
321 netif_tx_unlock_bh(dev->ndev);
322
323 netif_wake_queue(dev->ndev);
324
325 /* NOTE: unconditional netif_wake_queue is only appropriate
326 * so long as all callers are assured to have free tx slots
327 * (taken from tg3... though the case where that is wrong is
328 * not terribly harmful)
329 */
330 mal_poll_enable(dev->mal, &dev->commac);
331 }
332
333 static inline void emac_rx_disable_async(struct emac_instance *dev)
334 {
335 struct emac_regs __iomem *p = dev->emacp;
336 u32 r;
337
338 DBG(dev, "rx_disable_async" NL);
339
340 r = in_be32(&p->mr0);
341 if (r & EMAC_MR0_RXE)
342 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
343 }
344
345 static int emac_reset(struct emac_instance *dev)
346 {
347 struct emac_regs __iomem *p = dev->emacp;
348 int n = 20;
349
350 DBG(dev, "reset" NL);
351
352 if (!dev->reset_failed) {
353 /* 40x erratum suggests stopping RX channel before reset,
354 * we stop TX as well
355 */
356 emac_rx_disable(dev);
357 emac_tx_disable(dev);
358 }
359
360 #ifdef CONFIG_PPC_DCR_NATIVE
361 /* Enable internal clock source */
362 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
363 dcri_clrset(SDR0, SDR0_ETH_CFG,
364 0, SDR0_ETH_CFG_ECS << dev->cell_index);
365 #endif
366
367 out_be32(&p->mr0, EMAC_MR0_SRST);
368 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
369 --n;
370
371 #ifdef CONFIG_PPC_DCR_NATIVE
372 /* Enable external clock source */
373 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
374 dcri_clrset(SDR0, SDR0_ETH_CFG,
375 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
376 #endif
377
378 if (n) {
379 dev->reset_failed = 0;
380 return 0;
381 } else {
382 emac_report_timeout_error(dev, "reset timeout");
383 dev->reset_failed = 1;
384 return -ETIMEDOUT;
385 }
386 }
387
388 static void emac_hash_mc(struct emac_instance *dev)
389 {
390 const int regs = EMAC_XAHT_REGS(dev);
391 u32 *gaht_base = emac_gaht_base(dev);
392 u32 gaht_temp[regs];
393 struct netdev_hw_addr *ha;
394 int i;
395
396 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
397
398 memset(gaht_temp, 0, sizeof (gaht_temp));
399
400 netdev_for_each_mc_addr(ha, dev->ndev) {
401 int slot, reg, mask;
402 DBG2(dev, "mc %pM" NL, ha->addr);
403
404 slot = EMAC_XAHT_CRC_TO_SLOT(dev,
405 ether_crc(ETH_ALEN, ha->addr));
406 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
407 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
408
409 gaht_temp[reg] |= mask;
410 }
411
412 for (i = 0; i < regs; i++)
413 out_be32(gaht_base + i, gaht_temp[i]);
414 }
415
416 static inline u32 emac_iff2rmr(struct net_device *ndev)
417 {
418 struct emac_instance *dev = netdev_priv(ndev);
419 u32 r;
420
421 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
422
423 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
424 r |= EMAC4_RMR_BASE;
425 else
426 r |= EMAC_RMR_BASE;
427
428 if (ndev->flags & IFF_PROMISC)
429 r |= EMAC_RMR_PME;
430 else if (ndev->flags & IFF_ALLMULTI ||
431 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
432 r |= EMAC_RMR_PMME;
433 else if (!netdev_mc_empty(ndev))
434 r |= EMAC_RMR_MAE;
435
436 return r;
437 }
438
439 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
440 {
441 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
442
443 DBG2(dev, "__emac_calc_base_mr1" NL);
444
445 switch(tx_size) {
446 case 2048:
447 ret |= EMAC_MR1_TFS_2K;
448 break;
449 default:
450 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
451 dev->ndev->name, tx_size);
452 }
453
454 switch(rx_size) {
455 case 16384:
456 ret |= EMAC_MR1_RFS_16K;
457 break;
458 case 4096:
459 ret |= EMAC_MR1_RFS_4K;
460 break;
461 default:
462 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
463 dev->ndev->name, rx_size);
464 }
465
466 return ret;
467 }
468
469 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
470 {
471 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
472 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
473
474 DBG2(dev, "__emac4_calc_base_mr1" NL);
475
476 switch(tx_size) {
477 case 16384:
478 ret |= EMAC4_MR1_TFS_16K;
479 break;
480 case 4096:
481 ret |= EMAC4_MR1_TFS_4K;
482 break;
483 case 2048:
484 ret |= EMAC4_MR1_TFS_2K;
485 break;
486 default:
487 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
488 dev->ndev->name, tx_size);
489 }
490
491 switch(rx_size) {
492 case 16384:
493 ret |= EMAC4_MR1_RFS_16K;
494 break;
495 case 4096:
496 ret |= EMAC4_MR1_RFS_4K;
497 break;
498 case 2048:
499 ret |= EMAC4_MR1_RFS_2K;
500 break;
501 default:
502 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
503 dev->ndev->name, rx_size);
504 }
505
506 return ret;
507 }
508
509 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
510 {
511 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
512 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
513 __emac_calc_base_mr1(dev, tx_size, rx_size);
514 }
515
516 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
517 {
518 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
519 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
520 else
521 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
522 }
523
524 static inline u32 emac_calc_rwmr(struct emac_instance *dev,
525 unsigned int low, unsigned int high)
526 {
527 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
528 return (low << 22) | ( (high & 0x3ff) << 6);
529 else
530 return (low << 23) | ( (high & 0x1ff) << 7);
531 }
532
533 static int emac_configure(struct emac_instance *dev)
534 {
535 struct emac_regs __iomem *p = dev->emacp;
536 struct net_device *ndev = dev->ndev;
537 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
538 u32 r, mr1 = 0;
539
540 DBG(dev, "configure" NL);
541
542 if (!link) {
543 out_be32(&p->mr1, in_be32(&p->mr1)
544 | EMAC_MR1_FDE | EMAC_MR1_ILE);
545 udelay(100);
546 } else if (emac_reset(dev) < 0)
547 return -ETIMEDOUT;
548
549 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
550 tah_reset(dev->tah_dev);
551
552 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
553 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
554
555 /* Default fifo sizes */
556 tx_size = dev->tx_fifo_size;
557 rx_size = dev->rx_fifo_size;
558
559 /* No link, force loopback */
560 if (!link)
561 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
562
563 /* Check for full duplex */
564 else if (dev->phy.duplex == DUPLEX_FULL)
565 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
566
567 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
568 dev->stop_timeout = STOP_TIMEOUT_10;
569 switch (dev->phy.speed) {
570 case SPEED_1000:
571 if (emac_phy_gpcs(dev->phy.mode)) {
572 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
573 (dev->phy.gpcs_address != 0xffffffff) ?
574 dev->phy.gpcs_address : dev->phy.address);
575
576 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
577 * identify this GPCS PHY later.
578 */
579 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
580 } else
581 mr1 |= EMAC_MR1_MF_1000;
582
583 /* Extended fifo sizes */
584 tx_size = dev->tx_fifo_size_gige;
585 rx_size = dev->rx_fifo_size_gige;
586
587 if (dev->ndev->mtu > ETH_DATA_LEN) {
588 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
589 mr1 |= EMAC4_MR1_JPSM;
590 else
591 mr1 |= EMAC_MR1_JPSM;
592 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
593 } else
594 dev->stop_timeout = STOP_TIMEOUT_1000;
595 break;
596 case SPEED_100:
597 mr1 |= EMAC_MR1_MF_100;
598 dev->stop_timeout = STOP_TIMEOUT_100;
599 break;
600 default: /* make gcc happy */
601 break;
602 }
603
604 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
605 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
606 dev->phy.speed);
607 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
608 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
609
610 /* on 40x erratum forces us to NOT use integrated flow control,
611 * let's hope it works on 44x ;)
612 */
613 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
614 dev->phy.duplex == DUPLEX_FULL) {
615 if (dev->phy.pause)
616 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
617 else if (dev->phy.asym_pause)
618 mr1 |= EMAC_MR1_APP;
619 }
620
621 /* Add base settings & fifo sizes & program MR1 */
622 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
623 out_be32(&p->mr1, mr1);
624
625 /* Set individual MAC address */
626 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
627 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
628 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
629 ndev->dev_addr[5]);
630
631 /* VLAN Tag Protocol ID */
632 out_be32(&p->vtpid, 0x8100);
633
634 /* Receive mode register */
635 r = emac_iff2rmr(ndev);
636 if (r & EMAC_RMR_MAE)
637 emac_hash_mc(dev);
638 out_be32(&p->rmr, r);
639
640 /* FIFOs thresholds */
641 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
642 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
643 tx_size / 2 / dev->fifo_entry_size);
644 else
645 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
646 tx_size / 2 / dev->fifo_entry_size);
647 out_be32(&p->tmr1, r);
648 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
649
650 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
651 there should be still enough space in FIFO to allow the our link
652 partner time to process this frame and also time to send PAUSE
653 frame itself.
654
655 Here is the worst case scenario for the RX FIFO "headroom"
656 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
657
658 1) One maximum-length frame on TX 1522 bytes
659 2) One PAUSE frame time 64 bytes
660 3) PAUSE frame decode time allowance 64 bytes
661 4) One maximum-length frame on RX 1522 bytes
662 5) Round-trip propagation delay of the link (100Mb) 15 bytes
663 ----------
664 3187 bytes
665
666 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
667 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
668 */
669 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
670 rx_size / 4 / dev->fifo_entry_size);
671 out_be32(&p->rwmr, r);
672
673 /* Set PAUSE timer to the maximum */
674 out_be32(&p->ptr, 0xffff);
675
676 /* IRQ sources */
677 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
678 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
679 EMAC_ISR_IRE | EMAC_ISR_TE;
680 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
681 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
682 EMAC4_ISR_RXOE | */;
683 out_be32(&p->iser, r);
684
685 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
686 if (emac_phy_gpcs(dev->phy.mode)) {
687 if (dev->phy.gpcs_address != 0xffffffff)
688 emac_mii_reset_gpcs(&dev->phy);
689 else
690 emac_mii_reset_phy(&dev->phy);
691 }
692
693 return 0;
694 }
695
696 static void emac_reinitialize(struct emac_instance *dev)
697 {
698 DBG(dev, "reinitialize" NL);
699
700 emac_netif_stop(dev);
701 if (!emac_configure(dev)) {
702 emac_tx_enable(dev);
703 emac_rx_enable(dev);
704 }
705 emac_netif_start(dev);
706 }
707
708 static void emac_full_tx_reset(struct emac_instance *dev)
709 {
710 DBG(dev, "full_tx_reset" NL);
711
712 emac_tx_disable(dev);
713 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
714 emac_clean_tx_ring(dev);
715 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
716
717 emac_configure(dev);
718
719 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
720 emac_tx_enable(dev);
721 emac_rx_enable(dev);
722 }
723
724 static void emac_reset_work(struct work_struct *work)
725 {
726 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
727
728 DBG(dev, "reset_work" NL);
729
730 mutex_lock(&dev->link_lock);
731 if (dev->opened) {
732 emac_netif_stop(dev);
733 emac_full_tx_reset(dev);
734 emac_netif_start(dev);
735 }
736 mutex_unlock(&dev->link_lock);
737 }
738
739 static void emac_tx_timeout(struct net_device *ndev)
740 {
741 struct emac_instance *dev = netdev_priv(ndev);
742
743 DBG(dev, "tx_timeout" NL);
744
745 schedule_work(&dev->reset_work);
746 }
747
748
749 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
750 {
751 int done = !!(stacr & EMAC_STACR_OC);
752
753 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
754 done = !done;
755
756 return done;
757 };
758
759 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
760 {
761 struct emac_regs __iomem *p = dev->emacp;
762 u32 r = 0;
763 int n, err = -ETIMEDOUT;
764
765 mutex_lock(&dev->mdio_lock);
766
767 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
768
769 /* Enable proper MDIO port */
770 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
771 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
772 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
773 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
774
775 /* Wait for management interface to become idle */
776 n = 20;
777 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
778 udelay(1);
779 if (!--n) {
780 DBG2(dev, " -> timeout wait idle\n");
781 goto bail;
782 }
783 }
784
785 /* Issue read command */
786 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
787 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
788 else
789 r = EMAC_STACR_BASE(dev->opb_bus_freq);
790 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
791 r |= EMAC_STACR_OC;
792 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
793 r |= EMACX_STACR_STAC_READ;
794 else
795 r |= EMAC_STACR_STAC_READ;
796 r |= (reg & EMAC_STACR_PRA_MASK)
797 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
798 out_be32(&p->stacr, r);
799
800 /* Wait for read to complete */
801 n = 200;
802 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
803 udelay(1);
804 if (!--n) {
805 DBG2(dev, " -> timeout wait complete\n");
806 goto bail;
807 }
808 }
809
810 if (unlikely(r & EMAC_STACR_PHYE)) {
811 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
812 err = -EREMOTEIO;
813 goto bail;
814 }
815
816 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
817
818 DBG2(dev, "mdio_read -> %04x" NL, r);
819 err = 0;
820 bail:
821 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
822 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
823 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
824 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
825 mutex_unlock(&dev->mdio_lock);
826
827 return err == 0 ? r : err;
828 }
829
830 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
831 u16 val)
832 {
833 struct emac_regs __iomem *p = dev->emacp;
834 u32 r = 0;
835 int n, err = -ETIMEDOUT;
836
837 mutex_lock(&dev->mdio_lock);
838
839 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
840
841 /* Enable proper MDIO port */
842 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
843 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
844 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
845 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
846
847 /* Wait for management interface to be idle */
848 n = 20;
849 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
850 udelay(1);
851 if (!--n) {
852 DBG2(dev, " -> timeout wait idle\n");
853 goto bail;
854 }
855 }
856
857 /* Issue write command */
858 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
859 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
860 else
861 r = EMAC_STACR_BASE(dev->opb_bus_freq);
862 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
863 r |= EMAC_STACR_OC;
864 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
865 r |= EMACX_STACR_STAC_WRITE;
866 else
867 r |= EMAC_STACR_STAC_WRITE;
868 r |= (reg & EMAC_STACR_PRA_MASK) |
869 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
870 (val << EMAC_STACR_PHYD_SHIFT);
871 out_be32(&p->stacr, r);
872
873 /* Wait for write to complete */
874 n = 200;
875 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
876 udelay(1);
877 if (!--n) {
878 DBG2(dev, " -> timeout wait complete\n");
879 goto bail;
880 }
881 }
882 err = 0;
883 bail:
884 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
885 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
886 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
887 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
888 mutex_unlock(&dev->mdio_lock);
889 }
890
891 static int emac_mdio_read(struct net_device *ndev, int id, int reg)
892 {
893 struct emac_instance *dev = netdev_priv(ndev);
894 int res;
895
896 res = __emac_mdio_read((dev->mdio_instance &&
897 dev->phy.gpcs_address != id) ?
898 dev->mdio_instance : dev,
899 (u8) id, (u8) reg);
900 return res;
901 }
902
903 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
904 {
905 struct emac_instance *dev = netdev_priv(ndev);
906
907 __emac_mdio_write((dev->mdio_instance &&
908 dev->phy.gpcs_address != id) ?
909 dev->mdio_instance : dev,
910 (u8) id, (u8) reg, (u16) val);
911 }
912
913 /* Tx lock BH */
914 static void __emac_set_multicast_list(struct emac_instance *dev)
915 {
916 struct emac_regs __iomem *p = dev->emacp;
917 u32 rmr = emac_iff2rmr(dev->ndev);
918
919 DBG(dev, "__multicast %08x" NL, rmr);
920
921 /* I decided to relax register access rules here to avoid
922 * full EMAC reset.
923 *
924 * There is a real problem with EMAC4 core if we use MWSW_001 bit
925 * in MR1 register and do a full EMAC reset.
926 * One TX BD status update is delayed and, after EMAC reset, it
927 * never happens, resulting in TX hung (it'll be recovered by TX
928 * timeout handler eventually, but this is just gross).
929 * So we either have to do full TX reset or try to cheat here :)
930 *
931 * The only required change is to RX mode register, so I *think* all
932 * we need is just to stop RX channel. This seems to work on all
933 * tested SoCs. --ebs
934 *
935 * If we need the full reset, we might just trigger the workqueue
936 * and do it async... a bit nasty but should work --BenH
937 */
938 dev->mcast_pending = 0;
939 emac_rx_disable(dev);
940 if (rmr & EMAC_RMR_MAE)
941 emac_hash_mc(dev);
942 out_be32(&p->rmr, rmr);
943 emac_rx_enable(dev);
944 }
945
946 /* Tx lock BH */
947 static void emac_set_multicast_list(struct net_device *ndev)
948 {
949 struct emac_instance *dev = netdev_priv(ndev);
950
951 DBG(dev, "multicast" NL);
952
953 BUG_ON(!netif_running(dev->ndev));
954
955 if (dev->no_mcast) {
956 dev->mcast_pending = 1;
957 return;
958 }
959 __emac_set_multicast_list(dev);
960 }
961
962 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
963 {
964 int rx_sync_size = emac_rx_sync_size(new_mtu);
965 int rx_skb_size = emac_rx_skb_size(new_mtu);
966 int i, ret = 0;
967
968 mutex_lock(&dev->link_lock);
969 emac_netif_stop(dev);
970 emac_rx_disable(dev);
971 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
972
973 if (dev->rx_sg_skb) {
974 ++dev->estats.rx_dropped_resize;
975 dev_kfree_skb(dev->rx_sg_skb);
976 dev->rx_sg_skb = NULL;
977 }
978
979 /* Make a first pass over RX ring and mark BDs ready, dropping
980 * non-processed packets on the way. We need this as a separate pass
981 * to simplify error recovery in the case of allocation failure later.
982 */
983 for (i = 0; i < NUM_RX_BUFF; ++i) {
984 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
985 ++dev->estats.rx_dropped_resize;
986
987 dev->rx_desc[i].data_len = 0;
988 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
989 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
990 }
991
992 /* Reallocate RX ring only if bigger skb buffers are required */
993 if (rx_skb_size <= dev->rx_skb_size)
994 goto skip;
995
996 /* Second pass, allocate new skbs */
997 for (i = 0; i < NUM_RX_BUFF; ++i) {
998 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
999 if (!skb) {
1000 ret = -ENOMEM;
1001 goto oom;
1002 }
1003
1004 BUG_ON(!dev->rx_skb[i]);
1005 dev_kfree_skb(dev->rx_skb[i]);
1006
1007 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1008 dev->rx_desc[i].data_ptr =
1009 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1010 DMA_FROM_DEVICE) + 2;
1011 dev->rx_skb[i] = skb;
1012 }
1013 skip:
1014 /* Check if we need to change "Jumbo" bit in MR1 */
1015 if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) {
1016 /* This is to prevent starting RX channel in emac_rx_enable() */
1017 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1018
1019 dev->ndev->mtu = new_mtu;
1020 emac_full_tx_reset(dev);
1021 }
1022
1023 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1024 oom:
1025 /* Restart RX */
1026 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1027 dev->rx_slot = 0;
1028 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1029 emac_rx_enable(dev);
1030 emac_netif_start(dev);
1031 mutex_unlock(&dev->link_lock);
1032
1033 return ret;
1034 }
1035
1036 /* Process ctx, rtnl_lock semaphore */
1037 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1038 {
1039 struct emac_instance *dev = netdev_priv(ndev);
1040 int ret = 0;
1041
1042 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1043 return -EINVAL;
1044
1045 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1046
1047 if (netif_running(ndev)) {
1048 /* Check if we really need to reinitialize RX ring */
1049 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1050 ret = emac_resize_rx_ring(dev, new_mtu);
1051 }
1052
1053 if (!ret) {
1054 ndev->mtu = new_mtu;
1055 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1056 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1057 }
1058
1059 return ret;
1060 }
1061
1062 static void emac_clean_tx_ring(struct emac_instance *dev)
1063 {
1064 int i;
1065
1066 for (i = 0; i < NUM_TX_BUFF; ++i) {
1067 if (dev->tx_skb[i]) {
1068 dev_kfree_skb(dev->tx_skb[i]);
1069 dev->tx_skb[i] = NULL;
1070 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1071 ++dev->estats.tx_dropped;
1072 }
1073 dev->tx_desc[i].ctrl = 0;
1074 dev->tx_desc[i].data_ptr = 0;
1075 }
1076 }
1077
1078 static void emac_clean_rx_ring(struct emac_instance *dev)
1079 {
1080 int i;
1081
1082 for (i = 0; i < NUM_RX_BUFF; ++i)
1083 if (dev->rx_skb[i]) {
1084 dev->rx_desc[i].ctrl = 0;
1085 dev_kfree_skb(dev->rx_skb[i]);
1086 dev->rx_skb[i] = NULL;
1087 dev->rx_desc[i].data_ptr = 0;
1088 }
1089
1090 if (dev->rx_sg_skb) {
1091 dev_kfree_skb(dev->rx_sg_skb);
1092 dev->rx_sg_skb = NULL;
1093 }
1094 }
1095
1096 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1097 gfp_t flags)
1098 {
1099 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1100 if (unlikely(!skb))
1101 return -ENOMEM;
1102
1103 dev->rx_skb[slot] = skb;
1104 dev->rx_desc[slot].data_len = 0;
1105
1106 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1107 dev->rx_desc[slot].data_ptr =
1108 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1109 DMA_FROM_DEVICE) + 2;
1110 wmb();
1111 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1112 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1113
1114 return 0;
1115 }
1116
1117 static void emac_print_link_status(struct emac_instance *dev)
1118 {
1119 if (netif_carrier_ok(dev->ndev))
1120 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1121 dev->ndev->name, dev->phy.speed,
1122 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1123 dev->phy.pause ? ", pause enabled" :
1124 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1125 else
1126 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1127 }
1128
1129 /* Process ctx, rtnl_lock semaphore */
1130 static int emac_open(struct net_device *ndev)
1131 {
1132 struct emac_instance *dev = netdev_priv(ndev);
1133 int err, i;
1134
1135 DBG(dev, "open" NL);
1136
1137 /* Setup error IRQ handler */
1138 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1139 if (err) {
1140 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1141 ndev->name, dev->emac_irq);
1142 return err;
1143 }
1144
1145 /* Allocate RX ring */
1146 for (i = 0; i < NUM_RX_BUFF; ++i)
1147 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1148 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1149 ndev->name);
1150 goto oom;
1151 }
1152
1153 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1154 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1155 dev->rx_sg_skb = NULL;
1156
1157 mutex_lock(&dev->link_lock);
1158 dev->opened = 1;
1159
1160 /* Start PHY polling now.
1161 */
1162 if (dev->phy.address >= 0) {
1163 int link_poll_interval;
1164 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1165 dev->phy.def->ops->read_link(&dev->phy);
1166 emac_rx_clk_default(dev);
1167 netif_carrier_on(dev->ndev);
1168 link_poll_interval = PHY_POLL_LINK_ON;
1169 } else {
1170 emac_rx_clk_tx(dev);
1171 netif_carrier_off(dev->ndev);
1172 link_poll_interval = PHY_POLL_LINK_OFF;
1173 }
1174 dev->link_polling = 1;
1175 wmb();
1176 schedule_delayed_work(&dev->link_work, link_poll_interval);
1177 emac_print_link_status(dev);
1178 } else
1179 netif_carrier_on(dev->ndev);
1180
1181 /* Required for Pause packet support in EMAC */
1182 dev_mc_add_global(ndev, default_mcast_addr);
1183
1184 emac_configure(dev);
1185 mal_poll_add(dev->mal, &dev->commac);
1186 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1187 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1188 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1189 emac_tx_enable(dev);
1190 emac_rx_enable(dev);
1191 emac_netif_start(dev);
1192
1193 mutex_unlock(&dev->link_lock);
1194
1195 return 0;
1196 oom:
1197 emac_clean_rx_ring(dev);
1198 free_irq(dev->emac_irq, dev);
1199
1200 return -ENOMEM;
1201 }
1202
1203 /* BHs disabled */
1204 #if 0
1205 static int emac_link_differs(struct emac_instance *dev)
1206 {
1207 u32 r = in_be32(&dev->emacp->mr1);
1208
1209 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1210 int speed, pause, asym_pause;
1211
1212 if (r & EMAC_MR1_MF_1000)
1213 speed = SPEED_1000;
1214 else if (r & EMAC_MR1_MF_100)
1215 speed = SPEED_100;
1216 else
1217 speed = SPEED_10;
1218
1219 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1220 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1221 pause = 1;
1222 asym_pause = 0;
1223 break;
1224 case EMAC_MR1_APP:
1225 pause = 0;
1226 asym_pause = 1;
1227 break;
1228 default:
1229 pause = asym_pause = 0;
1230 }
1231 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1232 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1233 }
1234 #endif
1235
1236 static void emac_link_timer(struct work_struct *work)
1237 {
1238 struct emac_instance *dev =
1239 container_of(to_delayed_work(work),
1240 struct emac_instance, link_work);
1241 int link_poll_interval;
1242
1243 mutex_lock(&dev->link_lock);
1244 DBG2(dev, "link timer" NL);
1245
1246 if (!dev->opened)
1247 goto bail;
1248
1249 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1250 if (!netif_carrier_ok(dev->ndev)) {
1251 emac_rx_clk_default(dev);
1252 /* Get new link parameters */
1253 dev->phy.def->ops->read_link(&dev->phy);
1254
1255 netif_carrier_on(dev->ndev);
1256 emac_netif_stop(dev);
1257 emac_full_tx_reset(dev);
1258 emac_netif_start(dev);
1259 emac_print_link_status(dev);
1260 }
1261 link_poll_interval = PHY_POLL_LINK_ON;
1262 } else {
1263 if (netif_carrier_ok(dev->ndev)) {
1264 emac_rx_clk_tx(dev);
1265 netif_carrier_off(dev->ndev);
1266 netif_tx_disable(dev->ndev);
1267 emac_reinitialize(dev);
1268 emac_print_link_status(dev);
1269 }
1270 link_poll_interval = PHY_POLL_LINK_OFF;
1271 }
1272 schedule_delayed_work(&dev->link_work, link_poll_interval);
1273 bail:
1274 mutex_unlock(&dev->link_lock);
1275 }
1276
1277 static void emac_force_link_update(struct emac_instance *dev)
1278 {
1279 netif_carrier_off(dev->ndev);
1280 smp_rmb();
1281 if (dev->link_polling) {
1282 cancel_rearming_delayed_work(&dev->link_work);
1283 if (dev->link_polling)
1284 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1285 }
1286 }
1287
1288 /* Process ctx, rtnl_lock semaphore */
1289 static int emac_close(struct net_device *ndev)
1290 {
1291 struct emac_instance *dev = netdev_priv(ndev);
1292
1293 DBG(dev, "close" NL);
1294
1295 if (dev->phy.address >= 0) {
1296 dev->link_polling = 0;
1297 cancel_rearming_delayed_work(&dev->link_work);
1298 }
1299 mutex_lock(&dev->link_lock);
1300 emac_netif_stop(dev);
1301 dev->opened = 0;
1302 mutex_unlock(&dev->link_lock);
1303
1304 emac_rx_disable(dev);
1305 emac_tx_disable(dev);
1306 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1307 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1308 mal_poll_del(dev->mal, &dev->commac);
1309
1310 emac_clean_tx_ring(dev);
1311 emac_clean_rx_ring(dev);
1312
1313 free_irq(dev->emac_irq, dev);
1314
1315 netif_carrier_off(ndev);
1316
1317 return 0;
1318 }
1319
1320 static inline u16 emac_tx_csum(struct emac_instance *dev,
1321 struct sk_buff *skb)
1322 {
1323 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1324 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1325 ++dev->stats.tx_packets_csum;
1326 return EMAC_TX_CTRL_TAH_CSUM;
1327 }
1328 return 0;
1329 }
1330
1331 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1332 {
1333 struct emac_regs __iomem *p = dev->emacp;
1334 struct net_device *ndev = dev->ndev;
1335
1336 /* Send the packet out. If the if makes a significant perf
1337 * difference, then we can store the TMR0 value in "dev"
1338 * instead
1339 */
1340 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1341 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1342 else
1343 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1344
1345 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1346 netif_stop_queue(ndev);
1347 DBG2(dev, "stopped TX queue" NL);
1348 }
1349
1350 ndev->trans_start = jiffies;
1351 ++dev->stats.tx_packets;
1352 dev->stats.tx_bytes += len;
1353
1354 return NETDEV_TX_OK;
1355 }
1356
1357 /* Tx lock BH */
1358 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1359 {
1360 struct emac_instance *dev = netdev_priv(ndev);
1361 unsigned int len = skb->len;
1362 int slot;
1363
1364 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1365 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1366
1367 slot = dev->tx_slot++;
1368 if (dev->tx_slot == NUM_TX_BUFF) {
1369 dev->tx_slot = 0;
1370 ctrl |= MAL_TX_CTRL_WRAP;
1371 }
1372
1373 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1374
1375 dev->tx_skb[slot] = skb;
1376 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1377 skb->data, len,
1378 DMA_TO_DEVICE);
1379 dev->tx_desc[slot].data_len = (u16) len;
1380 wmb();
1381 dev->tx_desc[slot].ctrl = ctrl;
1382
1383 return emac_xmit_finish(dev, len);
1384 }
1385
1386 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1387 u32 pd, int len, int last, u16 base_ctrl)
1388 {
1389 while (1) {
1390 u16 ctrl = base_ctrl;
1391 int chunk = min(len, MAL_MAX_TX_SIZE);
1392 len -= chunk;
1393
1394 slot = (slot + 1) % NUM_TX_BUFF;
1395
1396 if (last && !len)
1397 ctrl |= MAL_TX_CTRL_LAST;
1398 if (slot == NUM_TX_BUFF - 1)
1399 ctrl |= MAL_TX_CTRL_WRAP;
1400
1401 dev->tx_skb[slot] = NULL;
1402 dev->tx_desc[slot].data_ptr = pd;
1403 dev->tx_desc[slot].data_len = (u16) chunk;
1404 dev->tx_desc[slot].ctrl = ctrl;
1405 ++dev->tx_cnt;
1406
1407 if (!len)
1408 break;
1409
1410 pd += chunk;
1411 }
1412 return slot;
1413 }
1414
1415 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1416 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1417 {
1418 struct emac_instance *dev = netdev_priv(ndev);
1419 int nr_frags = skb_shinfo(skb)->nr_frags;
1420 int len = skb->len, chunk;
1421 int slot, i;
1422 u16 ctrl;
1423 u32 pd;
1424
1425 /* This is common "fast" path */
1426 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1427 return emac_start_xmit(skb, ndev);
1428
1429 len -= skb->data_len;
1430
1431 /* Note, this is only an *estimation*, we can still run out of empty
1432 * slots because of the additional fragmentation into
1433 * MAL_MAX_TX_SIZE-sized chunks
1434 */
1435 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1436 goto stop_queue;
1437
1438 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1439 emac_tx_csum(dev, skb);
1440 slot = dev->tx_slot;
1441
1442 /* skb data */
1443 dev->tx_skb[slot] = NULL;
1444 chunk = min(len, MAL_MAX_TX_SIZE);
1445 dev->tx_desc[slot].data_ptr = pd =
1446 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1447 dev->tx_desc[slot].data_len = (u16) chunk;
1448 len -= chunk;
1449 if (unlikely(len))
1450 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1451 ctrl);
1452 /* skb fragments */
1453 for (i = 0; i < nr_frags; ++i) {
1454 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1455 len = frag->size;
1456
1457 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1458 goto undo_frame;
1459
1460 pd = dma_map_page(&dev->ofdev->dev, frag->page, frag->page_offset, len,
1461 DMA_TO_DEVICE);
1462
1463 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1464 ctrl);
1465 }
1466
1467 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1468
1469 /* Attach skb to the last slot so we don't release it too early */
1470 dev->tx_skb[slot] = skb;
1471
1472 /* Send the packet out */
1473 if (dev->tx_slot == NUM_TX_BUFF - 1)
1474 ctrl |= MAL_TX_CTRL_WRAP;
1475 wmb();
1476 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1477 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1478
1479 return emac_xmit_finish(dev, skb->len);
1480
1481 undo_frame:
1482 /* Well, too bad. Our previous estimation was overly optimistic.
1483 * Undo everything.
1484 */
1485 while (slot != dev->tx_slot) {
1486 dev->tx_desc[slot].ctrl = 0;
1487 --dev->tx_cnt;
1488 if (--slot < 0)
1489 slot = NUM_TX_BUFF - 1;
1490 }
1491 ++dev->estats.tx_undo;
1492
1493 stop_queue:
1494 netif_stop_queue(ndev);
1495 DBG2(dev, "stopped TX queue" NL);
1496 return NETDEV_TX_BUSY;
1497 }
1498
1499 /* Tx lock BHs */
1500 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1501 {
1502 struct emac_error_stats *st = &dev->estats;
1503
1504 DBG(dev, "BD TX error %04x" NL, ctrl);
1505
1506 ++st->tx_bd_errors;
1507 if (ctrl & EMAC_TX_ST_BFCS)
1508 ++st->tx_bd_bad_fcs;
1509 if (ctrl & EMAC_TX_ST_LCS)
1510 ++st->tx_bd_carrier_loss;
1511 if (ctrl & EMAC_TX_ST_ED)
1512 ++st->tx_bd_excessive_deferral;
1513 if (ctrl & EMAC_TX_ST_EC)
1514 ++st->tx_bd_excessive_collisions;
1515 if (ctrl & EMAC_TX_ST_LC)
1516 ++st->tx_bd_late_collision;
1517 if (ctrl & EMAC_TX_ST_MC)
1518 ++st->tx_bd_multple_collisions;
1519 if (ctrl & EMAC_TX_ST_SC)
1520 ++st->tx_bd_single_collision;
1521 if (ctrl & EMAC_TX_ST_UR)
1522 ++st->tx_bd_underrun;
1523 if (ctrl & EMAC_TX_ST_SQE)
1524 ++st->tx_bd_sqe;
1525 }
1526
1527 static void emac_poll_tx(void *param)
1528 {
1529 struct emac_instance *dev = param;
1530 u32 bad_mask;
1531
1532 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1533
1534 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1535 bad_mask = EMAC_IS_BAD_TX_TAH;
1536 else
1537 bad_mask = EMAC_IS_BAD_TX;
1538
1539 netif_tx_lock_bh(dev->ndev);
1540 if (dev->tx_cnt) {
1541 u16 ctrl;
1542 int slot = dev->ack_slot, n = 0;
1543 again:
1544 ctrl = dev->tx_desc[slot].ctrl;
1545 if (!(ctrl & MAL_TX_CTRL_READY)) {
1546 struct sk_buff *skb = dev->tx_skb[slot];
1547 ++n;
1548
1549 if (skb) {
1550 dev_kfree_skb(skb);
1551 dev->tx_skb[slot] = NULL;
1552 }
1553 slot = (slot + 1) % NUM_TX_BUFF;
1554
1555 if (unlikely(ctrl & bad_mask))
1556 emac_parse_tx_error(dev, ctrl);
1557
1558 if (--dev->tx_cnt)
1559 goto again;
1560 }
1561 if (n) {
1562 dev->ack_slot = slot;
1563 if (netif_queue_stopped(dev->ndev) &&
1564 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1565 netif_wake_queue(dev->ndev);
1566
1567 DBG2(dev, "tx %d pkts" NL, n);
1568 }
1569 }
1570 netif_tx_unlock_bh(dev->ndev);
1571 }
1572
1573 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1574 int len)
1575 {
1576 struct sk_buff *skb = dev->rx_skb[slot];
1577
1578 DBG2(dev, "recycle %d %d" NL, slot, len);
1579
1580 if (len)
1581 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1582 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1583
1584 dev->rx_desc[slot].data_len = 0;
1585 wmb();
1586 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1587 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1588 }
1589
1590 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1591 {
1592 struct emac_error_stats *st = &dev->estats;
1593
1594 DBG(dev, "BD RX error %04x" NL, ctrl);
1595
1596 ++st->rx_bd_errors;
1597 if (ctrl & EMAC_RX_ST_OE)
1598 ++st->rx_bd_overrun;
1599 if (ctrl & EMAC_RX_ST_BP)
1600 ++st->rx_bd_bad_packet;
1601 if (ctrl & EMAC_RX_ST_RP)
1602 ++st->rx_bd_runt_packet;
1603 if (ctrl & EMAC_RX_ST_SE)
1604 ++st->rx_bd_short_event;
1605 if (ctrl & EMAC_RX_ST_AE)
1606 ++st->rx_bd_alignment_error;
1607 if (ctrl & EMAC_RX_ST_BFCS)
1608 ++st->rx_bd_bad_fcs;
1609 if (ctrl & EMAC_RX_ST_PTL)
1610 ++st->rx_bd_packet_too_long;
1611 if (ctrl & EMAC_RX_ST_ORE)
1612 ++st->rx_bd_out_of_range;
1613 if (ctrl & EMAC_RX_ST_IRE)
1614 ++st->rx_bd_in_range;
1615 }
1616
1617 static inline void emac_rx_csum(struct emac_instance *dev,
1618 struct sk_buff *skb, u16 ctrl)
1619 {
1620 #ifdef CONFIG_IBM_NEW_EMAC_TAH
1621 if (!ctrl && dev->tah_dev) {
1622 skb->ip_summed = CHECKSUM_UNNECESSARY;
1623 ++dev->stats.rx_packets_csum;
1624 }
1625 #endif
1626 }
1627
1628 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1629 {
1630 if (likely(dev->rx_sg_skb != NULL)) {
1631 int len = dev->rx_desc[slot].data_len;
1632 int tot_len = dev->rx_sg_skb->len + len;
1633
1634 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1635 ++dev->estats.rx_dropped_mtu;
1636 dev_kfree_skb(dev->rx_sg_skb);
1637 dev->rx_sg_skb = NULL;
1638 } else {
1639 cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
1640 dev->rx_skb[slot]->data, len);
1641 skb_put(dev->rx_sg_skb, len);
1642 emac_recycle_rx_skb(dev, slot, len);
1643 return 0;
1644 }
1645 }
1646 emac_recycle_rx_skb(dev, slot, 0);
1647 return -1;
1648 }
1649
1650 /* NAPI poll context */
1651 static int emac_poll_rx(void *param, int budget)
1652 {
1653 struct emac_instance *dev = param;
1654 int slot = dev->rx_slot, received = 0;
1655
1656 DBG2(dev, "poll_rx(%d)" NL, budget);
1657
1658 again:
1659 while (budget > 0) {
1660 int len;
1661 struct sk_buff *skb;
1662 u16 ctrl = dev->rx_desc[slot].ctrl;
1663
1664 if (ctrl & MAL_RX_CTRL_EMPTY)
1665 break;
1666
1667 skb = dev->rx_skb[slot];
1668 mb();
1669 len = dev->rx_desc[slot].data_len;
1670
1671 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1672 goto sg;
1673
1674 ctrl &= EMAC_BAD_RX_MASK;
1675 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1676 emac_parse_rx_error(dev, ctrl);
1677 ++dev->estats.rx_dropped_error;
1678 emac_recycle_rx_skb(dev, slot, 0);
1679 len = 0;
1680 goto next;
1681 }
1682
1683 if (len < ETH_HLEN) {
1684 ++dev->estats.rx_dropped_stack;
1685 emac_recycle_rx_skb(dev, slot, len);
1686 goto next;
1687 }
1688
1689 if (len && len < EMAC_RX_COPY_THRESH) {
1690 struct sk_buff *copy_skb =
1691 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1692 if (unlikely(!copy_skb))
1693 goto oom;
1694
1695 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1696 cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
1697 len + 2);
1698 emac_recycle_rx_skb(dev, slot, len);
1699 skb = copy_skb;
1700 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1701 goto oom;
1702
1703 skb_put(skb, len);
1704 push_packet:
1705 skb->protocol = eth_type_trans(skb, dev->ndev);
1706 emac_rx_csum(dev, skb, ctrl);
1707
1708 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1709 ++dev->estats.rx_dropped_stack;
1710 next:
1711 ++dev->stats.rx_packets;
1712 skip:
1713 dev->stats.rx_bytes += len;
1714 slot = (slot + 1) % NUM_RX_BUFF;
1715 --budget;
1716 ++received;
1717 continue;
1718 sg:
1719 if (ctrl & MAL_RX_CTRL_FIRST) {
1720 BUG_ON(dev->rx_sg_skb);
1721 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1722 DBG(dev, "rx OOM %d" NL, slot);
1723 ++dev->estats.rx_dropped_oom;
1724 emac_recycle_rx_skb(dev, slot, 0);
1725 } else {
1726 dev->rx_sg_skb = skb;
1727 skb_put(skb, len);
1728 }
1729 } else if (!emac_rx_sg_append(dev, slot) &&
1730 (ctrl & MAL_RX_CTRL_LAST)) {
1731
1732 skb = dev->rx_sg_skb;
1733 dev->rx_sg_skb = NULL;
1734
1735 ctrl &= EMAC_BAD_RX_MASK;
1736 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1737 emac_parse_rx_error(dev, ctrl);
1738 ++dev->estats.rx_dropped_error;
1739 dev_kfree_skb(skb);
1740 len = 0;
1741 } else
1742 goto push_packet;
1743 }
1744 goto skip;
1745 oom:
1746 DBG(dev, "rx OOM %d" NL, slot);
1747 /* Drop the packet and recycle skb */
1748 ++dev->estats.rx_dropped_oom;
1749 emac_recycle_rx_skb(dev, slot, 0);
1750 goto next;
1751 }
1752
1753 if (received) {
1754 DBG2(dev, "rx %d BDs" NL, received);
1755 dev->rx_slot = slot;
1756 }
1757
1758 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1759 mb();
1760 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1761 DBG2(dev, "rx restart" NL);
1762 received = 0;
1763 goto again;
1764 }
1765
1766 if (dev->rx_sg_skb) {
1767 DBG2(dev, "dropping partial rx packet" NL);
1768 ++dev->estats.rx_dropped_error;
1769 dev_kfree_skb(dev->rx_sg_skb);
1770 dev->rx_sg_skb = NULL;
1771 }
1772
1773 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1774 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1775 emac_rx_enable(dev);
1776 dev->rx_slot = 0;
1777 }
1778 return received;
1779 }
1780
1781 /* NAPI poll context */
1782 static int emac_peek_rx(void *param)
1783 {
1784 struct emac_instance *dev = param;
1785
1786 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1787 }
1788
1789 /* NAPI poll context */
1790 static int emac_peek_rx_sg(void *param)
1791 {
1792 struct emac_instance *dev = param;
1793
1794 int slot = dev->rx_slot;
1795 while (1) {
1796 u16 ctrl = dev->rx_desc[slot].ctrl;
1797 if (ctrl & MAL_RX_CTRL_EMPTY)
1798 return 0;
1799 else if (ctrl & MAL_RX_CTRL_LAST)
1800 return 1;
1801
1802 slot = (slot + 1) % NUM_RX_BUFF;
1803
1804 /* I'm just being paranoid here :) */
1805 if (unlikely(slot == dev->rx_slot))
1806 return 0;
1807 }
1808 }
1809
1810 /* Hard IRQ */
1811 static void emac_rxde(void *param)
1812 {
1813 struct emac_instance *dev = param;
1814
1815 ++dev->estats.rx_stopped;
1816 emac_rx_disable_async(dev);
1817 }
1818
1819 /* Hard IRQ */
1820 static irqreturn_t emac_irq(int irq, void *dev_instance)
1821 {
1822 struct emac_instance *dev = dev_instance;
1823 struct emac_regs __iomem *p = dev->emacp;
1824 struct emac_error_stats *st = &dev->estats;
1825 u32 isr;
1826
1827 spin_lock(&dev->lock);
1828
1829 isr = in_be32(&p->isr);
1830 out_be32(&p->isr, isr);
1831
1832 DBG(dev, "isr = %08x" NL, isr);
1833
1834 if (isr & EMAC4_ISR_TXPE)
1835 ++st->tx_parity;
1836 if (isr & EMAC4_ISR_RXPE)
1837 ++st->rx_parity;
1838 if (isr & EMAC4_ISR_TXUE)
1839 ++st->tx_underrun;
1840 if (isr & EMAC4_ISR_RXOE)
1841 ++st->rx_fifo_overrun;
1842 if (isr & EMAC_ISR_OVR)
1843 ++st->rx_overrun;
1844 if (isr & EMAC_ISR_BP)
1845 ++st->rx_bad_packet;
1846 if (isr & EMAC_ISR_RP)
1847 ++st->rx_runt_packet;
1848 if (isr & EMAC_ISR_SE)
1849 ++st->rx_short_event;
1850 if (isr & EMAC_ISR_ALE)
1851 ++st->rx_alignment_error;
1852 if (isr & EMAC_ISR_BFCS)
1853 ++st->rx_bad_fcs;
1854 if (isr & EMAC_ISR_PTLE)
1855 ++st->rx_packet_too_long;
1856 if (isr & EMAC_ISR_ORE)
1857 ++st->rx_out_of_range;
1858 if (isr & EMAC_ISR_IRE)
1859 ++st->rx_in_range;
1860 if (isr & EMAC_ISR_SQE)
1861 ++st->tx_sqe;
1862 if (isr & EMAC_ISR_TE)
1863 ++st->tx_errors;
1864
1865 spin_unlock(&dev->lock);
1866
1867 return IRQ_HANDLED;
1868 }
1869
1870 static struct net_device_stats *emac_stats(struct net_device *ndev)
1871 {
1872 struct emac_instance *dev = netdev_priv(ndev);
1873 struct emac_stats *st = &dev->stats;
1874 struct emac_error_stats *est = &dev->estats;
1875 struct net_device_stats *nst = &dev->nstats;
1876 unsigned long flags;
1877
1878 DBG2(dev, "stats" NL);
1879
1880 /* Compute "legacy" statistics */
1881 spin_lock_irqsave(&dev->lock, flags);
1882 nst->rx_packets = (unsigned long)st->rx_packets;
1883 nst->rx_bytes = (unsigned long)st->rx_bytes;
1884 nst->tx_packets = (unsigned long)st->tx_packets;
1885 nst->tx_bytes = (unsigned long)st->tx_bytes;
1886 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1887 est->rx_dropped_error +
1888 est->rx_dropped_resize +
1889 est->rx_dropped_mtu);
1890 nst->tx_dropped = (unsigned long)est->tx_dropped;
1891
1892 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1893 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1894 est->rx_fifo_overrun +
1895 est->rx_overrun);
1896 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1897 est->rx_alignment_error);
1898 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1899 est->rx_bad_fcs);
1900 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1901 est->rx_bd_short_event +
1902 est->rx_bd_packet_too_long +
1903 est->rx_bd_out_of_range +
1904 est->rx_bd_in_range +
1905 est->rx_runt_packet +
1906 est->rx_short_event +
1907 est->rx_packet_too_long +
1908 est->rx_out_of_range +
1909 est->rx_in_range);
1910
1911 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1912 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1913 est->tx_underrun);
1914 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1915 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1916 est->tx_bd_excessive_collisions +
1917 est->tx_bd_late_collision +
1918 est->tx_bd_multple_collisions);
1919 spin_unlock_irqrestore(&dev->lock, flags);
1920 return nst;
1921 }
1922
1923 static struct mal_commac_ops emac_commac_ops = {
1924 .poll_tx = &emac_poll_tx,
1925 .poll_rx = &emac_poll_rx,
1926 .peek_rx = &emac_peek_rx,
1927 .rxde = &emac_rxde,
1928 };
1929
1930 static struct mal_commac_ops emac_commac_sg_ops = {
1931 .poll_tx = &emac_poll_tx,
1932 .poll_rx = &emac_poll_rx,
1933 .peek_rx = &emac_peek_rx_sg,
1934 .rxde = &emac_rxde,
1935 };
1936
1937 /* Ethtool support */
1938 static int emac_ethtool_get_settings(struct net_device *ndev,
1939 struct ethtool_cmd *cmd)
1940 {
1941 struct emac_instance *dev = netdev_priv(ndev);
1942
1943 cmd->supported = dev->phy.features;
1944 cmd->port = PORT_MII;
1945 cmd->phy_address = dev->phy.address;
1946 cmd->transceiver =
1947 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
1948
1949 mutex_lock(&dev->link_lock);
1950 cmd->advertising = dev->phy.advertising;
1951 cmd->autoneg = dev->phy.autoneg;
1952 cmd->speed = dev->phy.speed;
1953 cmd->duplex = dev->phy.duplex;
1954 mutex_unlock(&dev->link_lock);
1955
1956 return 0;
1957 }
1958
1959 static int emac_ethtool_set_settings(struct net_device *ndev,
1960 struct ethtool_cmd *cmd)
1961 {
1962 struct emac_instance *dev = netdev_priv(ndev);
1963 u32 f = dev->phy.features;
1964
1965 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
1966 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
1967
1968 /* Basic sanity checks */
1969 if (dev->phy.address < 0)
1970 return -EOPNOTSUPP;
1971 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
1972 return -EINVAL;
1973 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
1974 return -EINVAL;
1975 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
1976 return -EINVAL;
1977
1978 if (cmd->autoneg == AUTONEG_DISABLE) {
1979 switch (cmd->speed) {
1980 case SPEED_10:
1981 if (cmd->duplex == DUPLEX_HALF &&
1982 !(f & SUPPORTED_10baseT_Half))
1983 return -EINVAL;
1984 if (cmd->duplex == DUPLEX_FULL &&
1985 !(f & SUPPORTED_10baseT_Full))
1986 return -EINVAL;
1987 break;
1988 case SPEED_100:
1989 if (cmd->duplex == DUPLEX_HALF &&
1990 !(f & SUPPORTED_100baseT_Half))
1991 return -EINVAL;
1992 if (cmd->duplex == DUPLEX_FULL &&
1993 !(f & SUPPORTED_100baseT_Full))
1994 return -EINVAL;
1995 break;
1996 case SPEED_1000:
1997 if (cmd->duplex == DUPLEX_HALF &&
1998 !(f & SUPPORTED_1000baseT_Half))
1999 return -EINVAL;
2000 if (cmd->duplex == DUPLEX_FULL &&
2001 !(f & SUPPORTED_1000baseT_Full))
2002 return -EINVAL;
2003 break;
2004 default:
2005 return -EINVAL;
2006 }
2007
2008 mutex_lock(&dev->link_lock);
2009 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2010 cmd->duplex);
2011 mutex_unlock(&dev->link_lock);
2012
2013 } else {
2014 if (!(f & SUPPORTED_Autoneg))
2015 return -EINVAL;
2016
2017 mutex_lock(&dev->link_lock);
2018 dev->phy.def->ops->setup_aneg(&dev->phy,
2019 (cmd->advertising & f) |
2020 (dev->phy.advertising &
2021 (ADVERTISED_Pause |
2022 ADVERTISED_Asym_Pause)));
2023 mutex_unlock(&dev->link_lock);
2024 }
2025 emac_force_link_update(dev);
2026
2027 return 0;
2028 }
2029
2030 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2031 struct ethtool_ringparam *rp)
2032 {
2033 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2034 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2035 }
2036
2037 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2038 struct ethtool_pauseparam *pp)
2039 {
2040 struct emac_instance *dev = netdev_priv(ndev);
2041
2042 mutex_lock(&dev->link_lock);
2043 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2044 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2045 pp->autoneg = 1;
2046
2047 if (dev->phy.duplex == DUPLEX_FULL) {
2048 if (dev->phy.pause)
2049 pp->rx_pause = pp->tx_pause = 1;
2050 else if (dev->phy.asym_pause)
2051 pp->tx_pause = 1;
2052 }
2053 mutex_unlock(&dev->link_lock);
2054 }
2055
2056 static u32 emac_ethtool_get_rx_csum(struct net_device *ndev)
2057 {
2058 struct emac_instance *dev = netdev_priv(ndev);
2059
2060 return dev->tah_dev != NULL;
2061 }
2062
2063 static int emac_get_regs_len(struct emac_instance *dev)
2064 {
2065 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
2066 return sizeof(struct emac_ethtool_regs_subhdr) +
2067 EMAC4_ETHTOOL_REGS_SIZE(dev);
2068 else
2069 return sizeof(struct emac_ethtool_regs_subhdr) +
2070 EMAC_ETHTOOL_REGS_SIZE(dev);
2071 }
2072
2073 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2074 {
2075 struct emac_instance *dev = netdev_priv(ndev);
2076 int size;
2077
2078 size = sizeof(struct emac_ethtool_regs_hdr) +
2079 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2080 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2081 size += zmii_get_regs_len(dev->zmii_dev);
2082 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2083 size += rgmii_get_regs_len(dev->rgmii_dev);
2084 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2085 size += tah_get_regs_len(dev->tah_dev);
2086
2087 return size;
2088 }
2089
2090 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2091 {
2092 struct emac_ethtool_regs_subhdr *hdr = buf;
2093
2094 hdr->index = dev->cell_index;
2095 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2096 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2097 memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev));
2098 return (void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev);
2099 } else {
2100 hdr->version = EMAC_ETHTOOL_REGS_VER;
2101 memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev));
2102 return (void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev);
2103 }
2104 }
2105
2106 static void emac_ethtool_get_regs(struct net_device *ndev,
2107 struct ethtool_regs *regs, void *buf)
2108 {
2109 struct emac_instance *dev = netdev_priv(ndev);
2110 struct emac_ethtool_regs_hdr *hdr = buf;
2111
2112 hdr->components = 0;
2113 buf = hdr + 1;
2114
2115 buf = mal_dump_regs(dev->mal, buf);
2116 buf = emac_dump_regs(dev, buf);
2117 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2118 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2119 buf = zmii_dump_regs(dev->zmii_dev, buf);
2120 }
2121 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2122 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2123 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2124 }
2125 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2126 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2127 buf = tah_dump_regs(dev->tah_dev, buf);
2128 }
2129 }
2130
2131 static int emac_ethtool_nway_reset(struct net_device *ndev)
2132 {
2133 struct emac_instance *dev = netdev_priv(ndev);
2134 int res = 0;
2135
2136 DBG(dev, "nway_reset" NL);
2137
2138 if (dev->phy.address < 0)
2139 return -EOPNOTSUPP;
2140
2141 mutex_lock(&dev->link_lock);
2142 if (!dev->phy.autoneg) {
2143 res = -EINVAL;
2144 goto out;
2145 }
2146
2147 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2148 out:
2149 mutex_unlock(&dev->link_lock);
2150 emac_force_link_update(dev);
2151 return res;
2152 }
2153
2154 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2155 {
2156 if (stringset == ETH_SS_STATS)
2157 return EMAC_ETHTOOL_STATS_COUNT;
2158 else
2159 return -EINVAL;
2160 }
2161
2162 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2163 u8 * buf)
2164 {
2165 if (stringset == ETH_SS_STATS)
2166 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2167 }
2168
2169 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2170 struct ethtool_stats *estats,
2171 u64 * tmp_stats)
2172 {
2173 struct emac_instance *dev = netdev_priv(ndev);
2174
2175 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2176 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2177 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2178 }
2179
2180 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2181 struct ethtool_drvinfo *info)
2182 {
2183 struct emac_instance *dev = netdev_priv(ndev);
2184
2185 strcpy(info->driver, "ibm_emac");
2186 strcpy(info->version, DRV_VERSION);
2187 info->fw_version[0] = '\0';
2188 sprintf(info->bus_info, "PPC 4xx EMAC-%d %s",
2189 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2190 info->regdump_len = emac_ethtool_get_regs_len(ndev);
2191 }
2192
2193 static const struct ethtool_ops emac_ethtool_ops = {
2194 .get_settings = emac_ethtool_get_settings,
2195 .set_settings = emac_ethtool_set_settings,
2196 .get_drvinfo = emac_ethtool_get_drvinfo,
2197
2198 .get_regs_len = emac_ethtool_get_regs_len,
2199 .get_regs = emac_ethtool_get_regs,
2200
2201 .nway_reset = emac_ethtool_nway_reset,
2202
2203 .get_ringparam = emac_ethtool_get_ringparam,
2204 .get_pauseparam = emac_ethtool_get_pauseparam,
2205
2206 .get_rx_csum = emac_ethtool_get_rx_csum,
2207
2208 .get_strings = emac_ethtool_get_strings,
2209 .get_sset_count = emac_ethtool_get_sset_count,
2210 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2211
2212 .get_link = ethtool_op_get_link,
2213 .get_tx_csum = ethtool_op_get_tx_csum,
2214 .get_sg = ethtool_op_get_sg,
2215 };
2216
2217 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2218 {
2219 struct emac_instance *dev = netdev_priv(ndev);
2220 struct mii_ioctl_data *data = if_mii(rq);
2221
2222 DBG(dev, "ioctl %08x" NL, cmd);
2223
2224 if (dev->phy.address < 0)
2225 return -EOPNOTSUPP;
2226
2227 switch (cmd) {
2228 case SIOCGMIIPHY:
2229 data->phy_id = dev->phy.address;
2230 /* Fall through */
2231 case SIOCGMIIREG:
2232 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2233 data->reg_num);
2234 return 0;
2235
2236 case SIOCSMIIREG:
2237 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2238 data->val_in);
2239 return 0;
2240 default:
2241 return -EOPNOTSUPP;
2242 }
2243 }
2244
2245 struct emac_depentry {
2246 u32 phandle;
2247 struct device_node *node;
2248 struct platform_device *ofdev;
2249 void *drvdata;
2250 };
2251
2252 #define EMAC_DEP_MAL_IDX 0
2253 #define EMAC_DEP_ZMII_IDX 1
2254 #define EMAC_DEP_RGMII_IDX 2
2255 #define EMAC_DEP_TAH_IDX 3
2256 #define EMAC_DEP_MDIO_IDX 4
2257 #define EMAC_DEP_PREV_IDX 5
2258 #define EMAC_DEP_COUNT 6
2259
2260 static int __devinit emac_check_deps(struct emac_instance *dev,
2261 struct emac_depentry *deps)
2262 {
2263 int i, there = 0;
2264 struct device_node *np;
2265
2266 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2267 /* no dependency on that item, allright */
2268 if (deps[i].phandle == 0) {
2269 there++;
2270 continue;
2271 }
2272 /* special case for blist as the dependency might go away */
2273 if (i == EMAC_DEP_PREV_IDX) {
2274 np = *(dev->blist - 1);
2275 if (np == NULL) {
2276 deps[i].phandle = 0;
2277 there++;
2278 continue;
2279 }
2280 if (deps[i].node == NULL)
2281 deps[i].node = of_node_get(np);
2282 }
2283 if (deps[i].node == NULL)
2284 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2285 if (deps[i].node == NULL)
2286 continue;
2287 if (deps[i].ofdev == NULL)
2288 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2289 if (deps[i].ofdev == NULL)
2290 continue;
2291 if (deps[i].drvdata == NULL)
2292 deps[i].drvdata = dev_get_drvdata(&deps[i].ofdev->dev);
2293 if (deps[i].drvdata != NULL)
2294 there++;
2295 }
2296 return there == EMAC_DEP_COUNT;
2297 }
2298
2299 static void emac_put_deps(struct emac_instance *dev)
2300 {
2301 if (dev->mal_dev)
2302 of_dev_put(dev->mal_dev);
2303 if (dev->zmii_dev)
2304 of_dev_put(dev->zmii_dev);
2305 if (dev->rgmii_dev)
2306 of_dev_put(dev->rgmii_dev);
2307 if (dev->mdio_dev)
2308 of_dev_put(dev->mdio_dev);
2309 if (dev->tah_dev)
2310 of_dev_put(dev->tah_dev);
2311 }
2312
2313 static int __devinit emac_of_bus_notify(struct notifier_block *nb,
2314 unsigned long action, void *data)
2315 {
2316 /* We are only intereted in device addition */
2317 if (action == BUS_NOTIFY_BOUND_DRIVER)
2318 wake_up_all(&emac_probe_wait);
2319 return 0;
2320 }
2321
2322 static struct notifier_block emac_of_bus_notifier __devinitdata = {
2323 .notifier_call = emac_of_bus_notify
2324 };
2325
2326 static int __devinit emac_wait_deps(struct emac_instance *dev)
2327 {
2328 struct emac_depentry deps[EMAC_DEP_COUNT];
2329 int i, err;
2330
2331 memset(&deps, 0, sizeof(deps));
2332
2333 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2334 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2335 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2336 if (dev->tah_ph)
2337 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2338 if (dev->mdio_ph)
2339 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2340 if (dev->blist && dev->blist > emac_boot_list)
2341 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2342 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2343 wait_event_timeout(emac_probe_wait,
2344 emac_check_deps(dev, deps),
2345 EMAC_PROBE_DEP_TIMEOUT);
2346 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2347 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2348 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2349 if (deps[i].node)
2350 of_node_put(deps[i].node);
2351 if (err && deps[i].ofdev)
2352 of_dev_put(deps[i].ofdev);
2353 }
2354 if (err == 0) {
2355 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2356 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2357 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2358 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2359 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2360 }
2361 if (deps[EMAC_DEP_PREV_IDX].ofdev)
2362 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2363 return err;
2364 }
2365
2366 static int __devinit emac_read_uint_prop(struct device_node *np, const char *name,
2367 u32 *val, int fatal)
2368 {
2369 int len;
2370 const u32 *prop = of_get_property(np, name, &len);
2371 if (prop == NULL || len < sizeof(u32)) {
2372 if (fatal)
2373 printk(KERN_ERR "%s: missing %s property\n",
2374 np->full_name, name);
2375 return -ENODEV;
2376 }
2377 *val = *prop;
2378 return 0;
2379 }
2380
2381 static int __devinit emac_init_phy(struct emac_instance *dev)
2382 {
2383 struct device_node *np = dev->ofdev->dev.of_node;
2384 struct net_device *ndev = dev->ndev;
2385 u32 phy_map, adv;
2386 int i;
2387
2388 dev->phy.dev = ndev;
2389 dev->phy.mode = dev->phy_mode;
2390
2391 /* PHY-less configuration.
2392 * XXX I probably should move these settings to the dev tree
2393 */
2394 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2395 emac_reset(dev);
2396
2397 /* PHY-less configuration.
2398 * XXX I probably should move these settings to the dev tree
2399 */
2400 dev->phy.address = -1;
2401 dev->phy.features = SUPPORTED_MII;
2402 if (emac_phy_supports_gige(dev->phy_mode))
2403 dev->phy.features |= SUPPORTED_1000baseT_Full;
2404 else
2405 dev->phy.features |= SUPPORTED_100baseT_Full;
2406 dev->phy.pause = 1;
2407
2408 return 0;
2409 }
2410
2411 mutex_lock(&emac_phy_map_lock);
2412 phy_map = dev->phy_map | busy_phy_map;
2413
2414 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2415
2416 dev->phy.mdio_read = emac_mdio_read;
2417 dev->phy.mdio_write = emac_mdio_write;
2418
2419 /* Enable internal clock source */
2420 #ifdef CONFIG_PPC_DCR_NATIVE
2421 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2422 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2423 #endif
2424 /* PHY clock workaround */
2425 emac_rx_clk_tx(dev);
2426
2427 /* Enable internal clock source on 440GX*/
2428 #ifdef CONFIG_PPC_DCR_NATIVE
2429 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2430 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2431 #endif
2432 /* Configure EMAC with defaults so we can at least use MDIO
2433 * This is needed mostly for 440GX
2434 */
2435 if (emac_phy_gpcs(dev->phy.mode)) {
2436 /* XXX
2437 * Make GPCS PHY address equal to EMAC index.
2438 * We probably should take into account busy_phy_map
2439 * and/or phy_map here.
2440 *
2441 * Note that the busy_phy_map is currently global
2442 * while it should probably be per-ASIC...
2443 */
2444 dev->phy.gpcs_address = dev->gpcs_address;
2445 if (dev->phy.gpcs_address == 0xffffffff)
2446 dev->phy.address = dev->cell_index;
2447 }
2448
2449 emac_configure(dev);
2450
2451 if (dev->phy_address != 0xffffffff)
2452 phy_map = ~(1 << dev->phy_address);
2453
2454 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2455 if (!(phy_map & 1)) {
2456 int r;
2457 busy_phy_map |= 1 << i;
2458
2459 /* Quick check if there is a PHY at the address */
2460 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2461 if (r == 0xffff || r < 0)
2462 continue;
2463 if (!emac_mii_phy_probe(&dev->phy, i))
2464 break;
2465 }
2466
2467 /* Enable external clock source */
2468 #ifdef CONFIG_PPC_DCR_NATIVE
2469 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2470 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2471 #endif
2472 mutex_unlock(&emac_phy_map_lock);
2473 if (i == 0x20) {
2474 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2475 return -ENXIO;
2476 }
2477
2478 /* Init PHY */
2479 if (dev->phy.def->ops->init)
2480 dev->phy.def->ops->init(&dev->phy);
2481
2482 /* Disable any PHY features not supported by the platform */
2483 dev->phy.def->features &= ~dev->phy_feat_exc;
2484
2485 /* Setup initial link parameters */
2486 if (dev->phy.features & SUPPORTED_Autoneg) {
2487 adv = dev->phy.features;
2488 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2489 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2490 /* Restart autonegotiation */
2491 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2492 } else {
2493 u32 f = dev->phy.def->features;
2494 int speed = SPEED_10, fd = DUPLEX_HALF;
2495
2496 /* Select highest supported speed/duplex */
2497 if (f & SUPPORTED_1000baseT_Full) {
2498 speed = SPEED_1000;
2499 fd = DUPLEX_FULL;
2500 } else if (f & SUPPORTED_1000baseT_Half)
2501 speed = SPEED_1000;
2502 else if (f & SUPPORTED_100baseT_Full) {
2503 speed = SPEED_100;
2504 fd = DUPLEX_FULL;
2505 } else if (f & SUPPORTED_100baseT_Half)
2506 speed = SPEED_100;
2507 else if (f & SUPPORTED_10baseT_Full)
2508 fd = DUPLEX_FULL;
2509
2510 /* Force link parameters */
2511 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2512 }
2513 return 0;
2514 }
2515
2516 static int __devinit emac_init_config(struct emac_instance *dev)
2517 {
2518 struct device_node *np = dev->ofdev->dev.of_node;
2519 const void *p;
2520 unsigned int plen;
2521 const char *pm, *phy_modes[] = {
2522 [PHY_MODE_NA] = "",
2523 [PHY_MODE_MII] = "mii",
2524 [PHY_MODE_RMII] = "rmii",
2525 [PHY_MODE_SMII] = "smii",
2526 [PHY_MODE_RGMII] = "rgmii",
2527 [PHY_MODE_TBI] = "tbi",
2528 [PHY_MODE_GMII] = "gmii",
2529 [PHY_MODE_RTBI] = "rtbi",
2530 [PHY_MODE_SGMII] = "sgmii",
2531 };
2532
2533 /* Read config from device-tree */
2534 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2535 return -ENXIO;
2536 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2537 return -ENXIO;
2538 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2539 return -ENXIO;
2540 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2541 return -ENXIO;
2542 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2543 dev->max_mtu = 1500;
2544 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2545 dev->rx_fifo_size = 2048;
2546 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2547 dev->tx_fifo_size = 2048;
2548 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2549 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2550 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2551 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2552 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2553 dev->phy_address = 0xffffffff;
2554 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2555 dev->phy_map = 0xffffffff;
2556 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2557 dev->gpcs_address = 0xffffffff;
2558 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2559 return -ENXIO;
2560 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2561 dev->tah_ph = 0;
2562 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2563 dev->tah_port = 0;
2564 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2565 dev->mdio_ph = 0;
2566 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2567 dev->zmii_ph = 0;
2568 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2569 dev->zmii_port = 0xffffffff;
2570 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2571 dev->rgmii_ph = 0;
2572 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2573 dev->rgmii_port = 0xffffffff;
2574 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2575 dev->fifo_entry_size = 16;
2576 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2577 dev->mal_burst_size = 256;
2578
2579 /* PHY mode needs some decoding */
2580 dev->phy_mode = PHY_MODE_NA;
2581 pm = of_get_property(np, "phy-mode", &plen);
2582 if (pm != NULL) {
2583 int i;
2584 for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
2585 if (!strcasecmp(pm, phy_modes[i])) {
2586 dev->phy_mode = i;
2587 break;
2588 }
2589 }
2590
2591 /* Backward compat with non-final DT */
2592 if (dev->phy_mode == PHY_MODE_NA && pm != NULL && plen == 4) {
2593 u32 nmode = *(const u32 *)pm;
2594 if (nmode > PHY_MODE_NA && nmode <= PHY_MODE_SGMII)
2595 dev->phy_mode = nmode;
2596 }
2597
2598 /* Check EMAC version */
2599 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2600 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2601 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2602 of_device_is_compatible(np, "ibm,emac-460gt"))
2603 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2604 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2605 of_device_is_compatible(np, "ibm,emac-405exr"))
2606 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2607 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2608 dev->features |= EMAC_FTR_EMAC4;
2609 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2610 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2611 } else {
2612 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2613 of_device_is_compatible(np, "ibm,emac-440gr"))
2614 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2615 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2616 #ifdef CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL
2617 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2618 #else
2619 printk(KERN_ERR "%s: Flow control not disabled!\n",
2620 np->full_name);
2621 return -ENXIO;
2622 #endif
2623 }
2624
2625 }
2626
2627 /* Fixup some feature bits based on the device tree */
2628 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2629 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2630 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2631 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2632
2633 /* CAB lacks the appropriate properties */
2634 if (of_device_is_compatible(np, "ibm,emac-axon"))
2635 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2636 EMAC_FTR_STACR_OC_INVERT;
2637
2638 /* Enable TAH/ZMII/RGMII features as found */
2639 if (dev->tah_ph != 0) {
2640 #ifdef CONFIG_IBM_NEW_EMAC_TAH
2641 dev->features |= EMAC_FTR_HAS_TAH;
2642 #else
2643 printk(KERN_ERR "%s: TAH support not enabled !\n",
2644 np->full_name);
2645 return -ENXIO;
2646 #endif
2647 }
2648
2649 if (dev->zmii_ph != 0) {
2650 #ifdef CONFIG_IBM_NEW_EMAC_ZMII
2651 dev->features |= EMAC_FTR_HAS_ZMII;
2652 #else
2653 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2654 np->full_name);
2655 return -ENXIO;
2656 #endif
2657 }
2658
2659 if (dev->rgmii_ph != 0) {
2660 #ifdef CONFIG_IBM_NEW_EMAC_RGMII
2661 dev->features |= EMAC_FTR_HAS_RGMII;
2662 #else
2663 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2664 np->full_name);
2665 return -ENXIO;
2666 #endif
2667 }
2668
2669 /* Read MAC-address */
2670 p = of_get_property(np, "local-mac-address", NULL);
2671 if (p == NULL) {
2672 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2673 np->full_name);
2674 return -ENXIO;
2675 }
2676 memcpy(dev->ndev->dev_addr, p, 6);
2677
2678 /* IAHT and GAHT filter parameterization */
2679 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2680 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2681 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2682 } else {
2683 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2684 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2685 }
2686
2687 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2688 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2689 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2690 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2691 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2692
2693 return 0;
2694 }
2695
2696 static const struct net_device_ops emac_netdev_ops = {
2697 .ndo_open = emac_open,
2698 .ndo_stop = emac_close,
2699 .ndo_get_stats = emac_stats,
2700 .ndo_set_multicast_list = emac_set_multicast_list,
2701 .ndo_do_ioctl = emac_ioctl,
2702 .ndo_tx_timeout = emac_tx_timeout,
2703 .ndo_validate_addr = eth_validate_addr,
2704 .ndo_set_mac_address = eth_mac_addr,
2705 .ndo_start_xmit = emac_start_xmit,
2706 .ndo_change_mtu = eth_change_mtu,
2707 };
2708
2709 static const struct net_device_ops emac_gige_netdev_ops = {
2710 .ndo_open = emac_open,
2711 .ndo_stop = emac_close,
2712 .ndo_get_stats = emac_stats,
2713 .ndo_set_multicast_list = emac_set_multicast_list,
2714 .ndo_do_ioctl = emac_ioctl,
2715 .ndo_tx_timeout = emac_tx_timeout,
2716 .ndo_validate_addr = eth_validate_addr,
2717 .ndo_set_mac_address = eth_mac_addr,
2718 .ndo_start_xmit = emac_start_xmit_sg,
2719 .ndo_change_mtu = emac_change_mtu,
2720 };
2721
2722 static int __devinit emac_probe(struct platform_device *ofdev,
2723 const struct of_device_id *match)
2724 {
2725 struct net_device *ndev;
2726 struct emac_instance *dev;
2727 struct device_node *np = ofdev->dev.of_node;
2728 struct device_node **blist = NULL;
2729 int err, i;
2730
2731 /* Skip unused/unwired EMACS. We leave the check for an unused
2732 * property here for now, but new flat device trees should set a
2733 * status property to "disabled" instead.
2734 */
2735 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2736 return -ENODEV;
2737
2738 /* Find ourselves in the bootlist if we are there */
2739 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2740 if (emac_boot_list[i] == np)
2741 blist = &emac_boot_list[i];
2742
2743 /* Allocate our net_device structure */
2744 err = -ENOMEM;
2745 ndev = alloc_etherdev(sizeof(struct emac_instance));
2746 if (!ndev) {
2747 printk(KERN_ERR "%s: could not allocate ethernet device!\n",
2748 np->full_name);
2749 goto err_gone;
2750 }
2751 dev = netdev_priv(ndev);
2752 dev->ndev = ndev;
2753 dev->ofdev = ofdev;
2754 dev->blist = blist;
2755 SET_NETDEV_DEV(ndev, &ofdev->dev);
2756
2757 /* Initialize some embedded data structures */
2758 mutex_init(&dev->mdio_lock);
2759 mutex_init(&dev->link_lock);
2760 spin_lock_init(&dev->lock);
2761 INIT_WORK(&dev->reset_work, emac_reset_work);
2762
2763 /* Init various config data based on device-tree */
2764 err = emac_init_config(dev);
2765 if (err != 0)
2766 goto err_free;
2767
2768 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2769 dev->emac_irq = irq_of_parse_and_map(np, 0);
2770 dev->wol_irq = irq_of_parse_and_map(np, 1);
2771 if (dev->emac_irq == NO_IRQ) {
2772 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2773 goto err_free;
2774 }
2775 ndev->irq = dev->emac_irq;
2776
2777 /* Map EMAC regs */
2778 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2779 printk(KERN_ERR "%s: Can't get registers address\n",
2780 np->full_name);
2781 goto err_irq_unmap;
2782 }
2783 // TODO : request_mem_region
2784 dev->emacp = ioremap(dev->rsrc_regs.start,
2785 dev->rsrc_regs.end - dev->rsrc_regs.start + 1);
2786 if (dev->emacp == NULL) {
2787 printk(KERN_ERR "%s: Can't map device registers!\n",
2788 np->full_name);
2789 err = -ENOMEM;
2790 goto err_irq_unmap;
2791 }
2792
2793 /* Wait for dependent devices */
2794 err = emac_wait_deps(dev);
2795 if (err) {
2796 printk(KERN_ERR
2797 "%s: Timeout waiting for dependent devices\n",
2798 np->full_name);
2799 /* display more info about what's missing ? */
2800 goto err_reg_unmap;
2801 }
2802 dev->mal = dev_get_drvdata(&dev->mal_dev->dev);
2803 if (dev->mdio_dev != NULL)
2804 dev->mdio_instance = dev_get_drvdata(&dev->mdio_dev->dev);
2805
2806 /* Register with MAL */
2807 dev->commac.ops = &emac_commac_ops;
2808 dev->commac.dev = dev;
2809 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2810 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2811 err = mal_register_commac(dev->mal, &dev->commac);
2812 if (err) {
2813 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2814 np->full_name, dev->mal_dev->dev.of_node->full_name);
2815 goto err_rel_deps;
2816 }
2817 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2818 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2819
2820 /* Get pointers to BD rings */
2821 dev->tx_desc =
2822 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2823 dev->rx_desc =
2824 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2825
2826 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2827 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2828
2829 /* Clean rings */
2830 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2831 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2832 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2833 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2834
2835 /* Attach to ZMII, if needed */
2836 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2837 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2838 goto err_unreg_commac;
2839
2840 /* Attach to RGMII, if needed */
2841 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2842 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2843 goto err_detach_zmii;
2844
2845 /* Attach to TAH, if needed */
2846 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2847 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2848 goto err_detach_rgmii;
2849
2850 /* Set some link defaults before we can find out real parameters */
2851 dev->phy.speed = SPEED_100;
2852 dev->phy.duplex = DUPLEX_FULL;
2853 dev->phy.autoneg = AUTONEG_DISABLE;
2854 dev->phy.pause = dev->phy.asym_pause = 0;
2855 dev->stop_timeout = STOP_TIMEOUT_100;
2856 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2857
2858 /* Find PHY if any */
2859 err = emac_init_phy(dev);
2860 if (err != 0)
2861 goto err_detach_tah;
2862
2863 if (dev->tah_dev)
2864 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
2865 ndev->watchdog_timeo = 5 * HZ;
2866 if (emac_phy_supports_gige(dev->phy_mode)) {
2867 ndev->netdev_ops = &emac_gige_netdev_ops;
2868 dev->commac.ops = &emac_commac_sg_ops;
2869 } else
2870 ndev->netdev_ops = &emac_netdev_ops;
2871 SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
2872
2873 netif_carrier_off(ndev);
2874 netif_stop_queue(ndev);
2875
2876 err = register_netdev(ndev);
2877 if (err) {
2878 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2879 np->full_name, err);
2880 goto err_detach_tah;
2881 }
2882
2883 /* Set our drvdata last as we don't want them visible until we are
2884 * fully initialized
2885 */
2886 wmb();
2887 dev_set_drvdata(&ofdev->dev, dev);
2888
2889 /* There's a new kid in town ! Let's tell everybody */
2890 wake_up_all(&emac_probe_wait);
2891
2892
2893 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
2894 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
2895
2896 if (dev->phy_mode == PHY_MODE_SGMII)
2897 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2898
2899 if (dev->phy.address >= 0)
2900 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2901 dev->phy.def->name, dev->phy.address);
2902
2903 emac_dbg_register(dev);
2904
2905 /* Life is good */
2906 return 0;
2907
2908 /* I have a bad feeling about this ... */
2909
2910 err_detach_tah:
2911 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2912 tah_detach(dev->tah_dev, dev->tah_port);
2913 err_detach_rgmii:
2914 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2915 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2916 err_detach_zmii:
2917 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2918 zmii_detach(dev->zmii_dev, dev->zmii_port);
2919 err_unreg_commac:
2920 mal_unregister_commac(dev->mal, &dev->commac);
2921 err_rel_deps:
2922 emac_put_deps(dev);
2923 err_reg_unmap:
2924 iounmap(dev->emacp);
2925 err_irq_unmap:
2926 if (dev->wol_irq != NO_IRQ)
2927 irq_dispose_mapping(dev->wol_irq);
2928 if (dev->emac_irq != NO_IRQ)
2929 irq_dispose_mapping(dev->emac_irq);
2930 err_free:
2931 free_netdev(ndev);
2932 err_gone:
2933 /* if we were on the bootlist, remove us as we won't show up and
2934 * wake up all waiters to notify them in case they were waiting
2935 * on us
2936 */
2937 if (blist) {
2938 *blist = NULL;
2939 wake_up_all(&emac_probe_wait);
2940 }
2941 return err;
2942 }
2943
2944 static int __devexit emac_remove(struct platform_device *ofdev)
2945 {
2946 struct emac_instance *dev = dev_get_drvdata(&ofdev->dev);
2947
2948 DBG(dev, "remove" NL);
2949
2950 dev_set_drvdata(&ofdev->dev, NULL);
2951
2952 unregister_netdev(dev->ndev);
2953
2954 flush_scheduled_work();
2955
2956 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2957 tah_detach(dev->tah_dev, dev->tah_port);
2958 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2959 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2960 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2961 zmii_detach(dev->zmii_dev, dev->zmii_port);
2962
2963 mal_unregister_commac(dev->mal, &dev->commac);
2964 emac_put_deps(dev);
2965
2966 emac_dbg_unregister(dev);
2967 iounmap(dev->emacp);
2968
2969 if (dev->wol_irq != NO_IRQ)
2970 irq_dispose_mapping(dev->wol_irq);
2971 if (dev->emac_irq != NO_IRQ)
2972 irq_dispose_mapping(dev->emac_irq);
2973
2974 free_netdev(dev->ndev);
2975
2976 return 0;
2977 }
2978
2979 /* XXX Features in here should be replaced by properties... */
2980 static struct of_device_id emac_match[] =
2981 {
2982 {
2983 .type = "network",
2984 .compatible = "ibm,emac",
2985 },
2986 {
2987 .type = "network",
2988 .compatible = "ibm,emac4",
2989 },
2990 {
2991 .type = "network",
2992 .compatible = "ibm,emac4sync",
2993 },
2994 {},
2995 };
2996 MODULE_DEVICE_TABLE(of, emac_match);
2997
2998 static struct of_platform_driver emac_driver = {
2999 .driver = {
3000 .name = "emac",
3001 .owner = THIS_MODULE,
3002 .of_match_table = emac_match,
3003 },
3004 .probe = emac_probe,
3005 .remove = emac_remove,
3006 };
3007
3008 static void __init emac_make_bootlist(void)
3009 {
3010 struct device_node *np = NULL;
3011 int j, max, i = 0, k;
3012 int cell_indices[EMAC_BOOT_LIST_SIZE];
3013
3014 /* Collect EMACs */
3015 while((np = of_find_all_nodes(np)) != NULL) {
3016 const u32 *idx;
3017
3018 if (of_match_node(emac_match, np) == NULL)
3019 continue;
3020 if (of_get_property(np, "unused", NULL))
3021 continue;
3022 idx = of_get_property(np, "cell-index", NULL);
3023 if (idx == NULL)
3024 continue;
3025 cell_indices[i] = *idx;
3026 emac_boot_list[i++] = of_node_get(np);
3027 if (i >= EMAC_BOOT_LIST_SIZE) {
3028 of_node_put(np);
3029 break;
3030 }
3031 }
3032 max = i;
3033
3034 /* Bubble sort them (doh, what a creative algorithm :-) */
3035 for (i = 0; max > 1 && (i < (max - 1)); i++)
3036 for (j = i; j < max; j++) {
3037 if (cell_indices[i] > cell_indices[j]) {
3038 np = emac_boot_list[i];
3039 emac_boot_list[i] = emac_boot_list[j];
3040 emac_boot_list[j] = np;
3041 k = cell_indices[i];
3042 cell_indices[i] = cell_indices[j];
3043 cell_indices[j] = k;
3044 }
3045 }
3046 }
3047
3048 static int __init emac_init(void)
3049 {
3050 int rc;
3051
3052 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3053
3054 /* Init debug stuff */
3055 emac_init_debug();
3056
3057 /* Build EMAC boot list */
3058 emac_make_bootlist();
3059
3060 /* Init submodules */
3061 rc = mal_init();
3062 if (rc)
3063 goto err;
3064 rc = zmii_init();
3065 if (rc)
3066 goto err_mal;
3067 rc = rgmii_init();
3068 if (rc)
3069 goto err_zmii;
3070 rc = tah_init();
3071 if (rc)
3072 goto err_rgmii;
3073 rc = of_register_platform_driver(&emac_driver);
3074 if (rc)
3075 goto err_tah;
3076
3077 return 0;
3078
3079 err_tah:
3080 tah_exit();
3081 err_rgmii:
3082 rgmii_exit();
3083 err_zmii:
3084 zmii_exit();
3085 err_mal:
3086 mal_exit();
3087 err:
3088 return rc;
3089 }
3090
3091 static void __exit emac_exit(void)
3092 {
3093 int i;
3094
3095 of_unregister_platform_driver(&emac_driver);
3096
3097 tah_exit();
3098 rgmii_exit();
3099 zmii_exit();
3100 mal_exit();
3101 emac_fini_debug();
3102
3103 /* Destroy EMAC boot list */
3104 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3105 if (emac_boot_list[i])
3106 of_node_put(emac_boot_list[i]);
3107 }
3108
3109 module_init(emac_init);
3110 module_exit(emac_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree