?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
[linux-2.6.git] / drivers / net / ethernet / ibm / emac / core.c
blobae342fdb42c8e79853507007ad2ea6c8d3681fad
1 /*
2 * drivers/net/ethernet/ibm/emac/core.c
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller.
5 *
6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
7 * <benh@kernel.crashing.org>
8 *
9 * Based on the arch/ppc version of the driver:
10 *
11 * Copyright (c) 2004, 2005 Zultys Technologies.
12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
13 *
14 * Based on original work by
15 * Matt Porter <mporter@kernel.crashing.org>
16 * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
17 * Armin Kuster <akuster@mvista.com>
18 * Johnnie Peters <jpeters@mvista.com>
19 *
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms of the GNU General Public License as published by the
22 * Free Software Foundation; either version 2 of the License, or (at your
23 * option) any later version.
24 *
25 */
26
27 #include <linux/module.h>
28 #include <linux/sched.h>
29 #include <linux/string.h>
30 #include <linux/errno.h>
31 #include <linux/delay.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/crc32.h>
37 #include <linux/ethtool.h>
38 #include <linux/mii.h>
39 #include <linux/bitops.h>
40 #include <linux/workqueue.h>
41 #include <linux/of.h>
42 #include <linux/of_address.h>
43 #include <linux/of_irq.h>
44 #include <linux/of_net.h>
45 #include <linux/slab.h>
46
47 #include <asm/processor.h>
48 #include <asm/io.h>
49 #include <asm/dma.h>
50 #include <asm/uaccess.h>
51 #include <asm/dcr.h>
52 #include <asm/dcr-regs.h>
53
54 #include "core.h"
55
56 /*
57 * Lack of dma_unmap_???? calls is intentional.
58 *
59 * API-correct usage requires additional support state information to be
60 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
61 * EMAC design (e.g. TX buffer passed from network stack can be split into
62 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
63 * maintaining such information will add additional overhead.
64 * Current DMA API implementation for 4xx processors only ensures cache coherency
65 * and dma_unmap_???? routines are empty and are likely to stay this way.
66 * I decided to omit dma_unmap_??? calls because I don't want to add additional
67 * complexity just for the sake of following some abstract API, when it doesn't
68 * add any real benefit to the driver. I understand that this decision maybe
69 * controversial, but I really tried to make code API-correct and efficient
70 * at the same time and didn't come up with code I liked :(. --ebs
71 */
72
73 #define DRV_NAME "emac"
74 #define DRV_VERSION "3.54"
75 #define DRV_DESC "PPC 4xx OCP EMAC driver"
76
77 MODULE_DESCRIPTION(DRV_DESC);
78 MODULE_AUTHOR
79 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
80 MODULE_LICENSE("GPL");
81
82 /*
83 * PPC64 doesn't (yet) have a cacheable_memcpy
84 */
85 #ifdef CONFIG_PPC64
86 #define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
87 #endif
88
89 /* minimum number of free TX descriptors required to wake up TX process */
90 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
91
92 /* If packet size is less than this number, we allocate small skb and copy packet
93 * contents into it instead of just sending original big skb up
94 */
95 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
96
97 /* Since multiple EMACs share MDIO lines in various ways, we need
98 * to avoid re-using the same PHY ID in cases where the arch didn't
99 * setup precise phy_map entries
100 *
101 * XXX This is something that needs to be reworked as we can have multiple
102 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
103 * probably require in that case to have explicit PHY IDs in the device-tree
104 */
105 static u32 busy_phy_map;
106 static DEFINE_MUTEX(emac_phy_map_lock);
107
108 /* This is the wait queue used to wait on any event related to probe, that
109 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
110 */
111 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
112
113 /* Having stable interface names is a doomed idea. However, it would be nice
114 * if we didn't have completely random interface names at boot too :-) It's
115 * just a matter of making everybody's life easier. Since we are doing
116 * threaded probing, it's a bit harder though. The base idea here is that
117 * we make up a list of all emacs in the device-tree before we register the
118 * driver. Every emac will then wait for the previous one in the list to
119 * initialize before itself. We should also keep that list ordered by
120 * cell_index.
121 * That list is only 4 entries long, meaning that additional EMACs don't
122 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
123 */
124
125 #define EMAC_BOOT_LIST_SIZE 4
126 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
127
128 /* How long should I wait for dependent devices ? */
129 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
130
131 /* I don't want to litter system log with timeout errors
132 * when we have brain-damaged PHY.
133 */
134 static inline void emac_report_timeout_error(struct emac_instance *dev,
135 const char *error)
136 {
137 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
138 EMAC_FTR_460EX_PHY_CLK_FIX |
139 EMAC_FTR_440EP_PHY_CLK_FIX))
140 DBG(dev, "%s" NL, error);
141 else if (net_ratelimit())
142 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
143 error);
144 }
145
146 /* EMAC PHY clock workaround:
147 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
148 * which allows controlling each EMAC clock
149 */
150 static inline void emac_rx_clk_tx(struct emac_instance *dev)
151 {
152 #ifdef CONFIG_PPC_DCR_NATIVE
153 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
154 dcri_clrset(SDR0, SDR0_MFR,
155 0, SDR0_MFR_ECS >> dev->cell_index);
156 #endif
157 }
158
159 static inline void emac_rx_clk_default(struct emac_instance *dev)
160 {
161 #ifdef CONFIG_PPC_DCR_NATIVE
162 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
163 dcri_clrset(SDR0, SDR0_MFR,
164 SDR0_MFR_ECS >> dev->cell_index, 0);
165 #endif
166 }
167
168 /* PHY polling intervals */
169 #define PHY_POLL_LINK_ON HZ
170 #define PHY_POLL_LINK_OFF (HZ / 5)
171
172 /* Graceful stop timeouts in us.
173 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
174 */
175 #define STOP_TIMEOUT_10 1230
176 #define STOP_TIMEOUT_100 124
177 #define STOP_TIMEOUT_1000 13
178 #define STOP_TIMEOUT_1000_JUMBO 73
179
180 static unsigned char default_mcast_addr[] = {
181 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
182 };
183
184 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
185 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
186 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
187 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
188 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
189 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
190 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
191 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
192 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
193 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
194 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
195 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
196 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
197 "tx_bd_excessive_collisions", "tx_bd_late_collision",
198 "tx_bd_multple_collisions", "tx_bd_single_collision",
199 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
200 "tx_errors"
201 };
202
203 static irqreturn_t emac_irq(int irq, void *dev_instance);
204 static void emac_clean_tx_ring(struct emac_instance *dev);
205 static void __emac_set_multicast_list(struct emac_instance *dev);
206
207 static inline int emac_phy_supports_gige(int phy_mode)
208 {
209 return phy_mode == PHY_MODE_GMII ||
210 phy_mode == PHY_MODE_RGMII ||
211 phy_mode == PHY_MODE_SGMII ||
212 phy_mode == PHY_MODE_TBI ||
213 phy_mode == PHY_MODE_RTBI;
214 }
215
216 static inline int emac_phy_gpcs(int phy_mode)
217 {
218 return phy_mode == PHY_MODE_SGMII ||
219 phy_mode == PHY_MODE_TBI ||
220 phy_mode == PHY_MODE_RTBI;
221 }
222
223 static inline void emac_tx_enable(struct emac_instance *dev)
224 {
225 struct emac_regs __iomem *p = dev->emacp;
226 u32 r;
227
228 DBG(dev, "tx_enable" NL);
229
230 r = in_be32(&p->mr0);
231 if (!(r & EMAC_MR0_TXE))
232 out_be32(&p->mr0, r | EMAC_MR0_TXE);
233 }
234
235 static void emac_tx_disable(struct emac_instance *dev)
236 {
237 struct emac_regs __iomem *p = dev->emacp;
238 u32 r;
239
240 DBG(dev, "tx_disable" NL);
241
242 r = in_be32(&p->mr0);
243 if (r & EMAC_MR0_TXE) {
244 int n = dev->stop_timeout;
245 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
246 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
247 udelay(1);
248 --n;
249 }
250 if (unlikely(!n))
251 emac_report_timeout_error(dev, "TX disable timeout");
252 }
253 }
254
255 static void emac_rx_enable(struct emac_instance *dev)
256 {
257 struct emac_regs __iomem *p = dev->emacp;
258 u32 r;
259
260 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
261 goto out;
262
263 DBG(dev, "rx_enable" NL);
264
265 r = in_be32(&p->mr0);
266 if (!(r & EMAC_MR0_RXE)) {
267 if (unlikely(!(r & EMAC_MR0_RXI))) {
268 /* Wait if previous async disable is still in progress */
269 int n = dev->stop_timeout;
270 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
271 udelay(1);
272 --n;
273 }
274 if (unlikely(!n))
275 emac_report_timeout_error(dev,
276 "RX disable timeout");
277 }
278 out_be32(&p->mr0, r | EMAC_MR0_RXE);
279 }
280 out:
281 ;
282 }
283
284 static void emac_rx_disable(struct emac_instance *dev)
285 {
286 struct emac_regs __iomem *p = dev->emacp;
287 u32 r;
288
289 DBG(dev, "rx_disable" NL);
290
291 r = in_be32(&p->mr0);
292 if (r & EMAC_MR0_RXE) {
293 int n = dev->stop_timeout;
294 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
295 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
296 udelay(1);
297 --n;
298 }
299 if (unlikely(!n))
300 emac_report_timeout_error(dev, "RX disable timeout");
301 }
302 }
303
304 static inline void emac_netif_stop(struct emac_instance *dev)
305 {
306 netif_tx_lock_bh(dev->ndev);
307 netif_addr_lock(dev->ndev);
308 dev->no_mcast = 1;
309 netif_addr_unlock(dev->ndev);
310 netif_tx_unlock_bh(dev->ndev);
311 dev->ndev->trans_start = jiffies; /* prevent tx timeout */
312 mal_poll_disable(dev->mal, &dev->commac);
313 netif_tx_disable(dev->ndev);
314 }
315
316 static inline void emac_netif_start(struct emac_instance *dev)
317 {
318 netif_tx_lock_bh(dev->ndev);
319 netif_addr_lock(dev->ndev);
320 dev->no_mcast = 0;
321 if (dev->mcast_pending && netif_running(dev->ndev))
322 __emac_set_multicast_list(dev);
323 netif_addr_unlock(dev->ndev);
324 netif_tx_unlock_bh(dev->ndev);
325
326 netif_wake_queue(dev->ndev);
327
328 /* NOTE: unconditional netif_wake_queue is only appropriate
329 * so long as all callers are assured to have free tx slots
330 * (taken from tg3... though the case where that is wrong is
331 * not terribly harmful)
332 */
333 mal_poll_enable(dev->mal, &dev->commac);
334 }
335
336 static inline void emac_rx_disable_async(struct emac_instance *dev)
337 {
338 struct emac_regs __iomem *p = dev->emacp;
339 u32 r;
340
341 DBG(dev, "rx_disable_async" NL);
342
343 r = in_be32(&p->mr0);
344 if (r & EMAC_MR0_RXE)
345 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
346 }
347
348 static int emac_reset(struct emac_instance *dev)
349 {
350 struct emac_regs __iomem *p = dev->emacp;
351 int n = 20;
352
353 DBG(dev, "reset" NL);
354
355 if (!dev->reset_failed) {
356 /* 40x erratum suggests stopping RX channel before reset,
357 * we stop TX as well
358 */
359 emac_rx_disable(dev);
360 emac_tx_disable(dev);
361 }
362
363 #ifdef CONFIG_PPC_DCR_NATIVE
364 /*
365 * PPC460EX/GT Embedded Processor Advanced User's Manual
366 * section 28.10.1 Mode Register 0 (EMACx_MR0) states:
367 * Note: The PHY must provide a TX Clk in order to perform a soft reset
368 * of the EMAC. If none is present, select the internal clock
369 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1).
370 * After a soft reset, select the external clock.
371 */
372 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
373 if (dev->phy_address == 0xffffffff &&
374 dev->phy_map == 0xffffffff) {
375 /* No PHY: select internal loop clock before reset */
376 dcri_clrset(SDR0, SDR0_ETH_CFG,
377 0, SDR0_ETH_CFG_ECS << dev->cell_index);
378 } else {
379 /* PHY present: select external clock before reset */
380 dcri_clrset(SDR0, SDR0_ETH_CFG,
381 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
382 }
383 }
384 #endif
385
386 out_be32(&p->mr0, EMAC_MR0_SRST);
387 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
388 --n;
389
390 #ifdef CONFIG_PPC_DCR_NATIVE
391 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
392 if (dev->phy_address == 0xffffffff &&
393 dev->phy_map == 0xffffffff) {
394 /* No PHY: restore external clock source after reset */
395 dcri_clrset(SDR0, SDR0_ETH_CFG,
396 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
397 }
398 }
399 #endif
400
401 if (n) {
402 dev->reset_failed = 0;
403 return 0;
404 } else {
405 emac_report_timeout_error(dev, "reset timeout");
406 dev->reset_failed = 1;
407 return -ETIMEDOUT;
408 }
409 }
410
411 static void emac_hash_mc(struct emac_instance *dev)
412 {
413 const int regs = EMAC_XAHT_REGS(dev);
414 u32 *gaht_base = emac_gaht_base(dev);
415 u32 gaht_temp[regs];
416 struct netdev_hw_addr *ha;
417 int i;
418
419 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
420
421 memset(gaht_temp, 0, sizeof (gaht_temp));
422
423 netdev_for_each_mc_addr(ha, dev->ndev) {
424 int slot, reg, mask;
425 DBG2(dev, "mc %pM" NL, ha->addr);
426
427 slot = EMAC_XAHT_CRC_TO_SLOT(dev,
428 ether_crc(ETH_ALEN, ha->addr));
429 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
430 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
431
432 gaht_temp[reg] |= mask;
433 }
434
435 for (i = 0; i < regs; i++)
436 out_be32(gaht_base + i, gaht_temp[i]);
437 }
438
439 static inline u32 emac_iff2rmr(struct net_device *ndev)
440 {
441 struct emac_instance *dev = netdev_priv(ndev);
442 u32 r;
443
444 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
445
446 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
447 r |= EMAC4_RMR_BASE;
448 else
449 r |= EMAC_RMR_BASE;
450
451 if (ndev->flags & IFF_PROMISC)
452 r |= EMAC_RMR_PME;
453 else if (ndev->flags & IFF_ALLMULTI ||
454 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
455 r |= EMAC_RMR_PMME;
456 else if (!netdev_mc_empty(ndev))
457 r |= EMAC_RMR_MAE;
458
459 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
460 r &= ~EMAC4_RMR_MJS_MASK;
461 r |= EMAC4_RMR_MJS(ndev->mtu);
462 }
463
464 return r;
465 }
466
467 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
468 {
469 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
470
471 DBG2(dev, "__emac_calc_base_mr1" NL);
472
473 switch(tx_size) {
474 case 2048:
475 ret |= EMAC_MR1_TFS_2K;
476 break;
477 default:
478 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
479 dev->ndev->name, tx_size);
480 }
481
482 switch(rx_size) {
483 case 16384:
484 ret |= EMAC_MR1_RFS_16K;
485 break;
486 case 4096:
487 ret |= EMAC_MR1_RFS_4K;
488 break;
489 default:
490 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
491 dev->ndev->name, rx_size);
492 }
493
494 return ret;
495 }
496
497 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
498 {
499 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
500 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
501
502 DBG2(dev, "__emac4_calc_base_mr1" NL);
503
504 switch(tx_size) {
505 case 16384:
506 ret |= EMAC4_MR1_TFS_16K;
507 break;
508 case 4096:
509 ret |= EMAC4_MR1_TFS_4K;
510 break;
511 case 2048:
512 ret |= EMAC4_MR1_TFS_2K;
513 break;
514 default:
515 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
516 dev->ndev->name, tx_size);
517 }
518
519 switch(rx_size) {
520 case 16384:
521 ret |= EMAC4_MR1_RFS_16K;
522 break;
523 case 4096:
524 ret |= EMAC4_MR1_RFS_4K;
525 break;
526 case 2048:
527 ret |= EMAC4_MR1_RFS_2K;
528 break;
529 default:
530 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
531 dev->ndev->name, rx_size);
532 }
533
534 return ret;
535 }
536
537 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
538 {
539 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
540 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
541 __emac_calc_base_mr1(dev, tx_size, rx_size);
542 }
543
544 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
545 {
546 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
547 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
548 else
549 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
550 }
551
552 static inline u32 emac_calc_rwmr(struct emac_instance *dev,
553 unsigned int low, unsigned int high)
554 {
555 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
556 return (low << 22) | ( (high & 0x3ff) << 6);
557 else
558 return (low << 23) | ( (high & 0x1ff) << 7);
559 }
560
561 static int emac_configure(struct emac_instance *dev)
562 {
563 struct emac_regs __iomem *p = dev->emacp;
564 struct net_device *ndev = dev->ndev;
565 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
566 u32 r, mr1 = 0;
567
568 DBG(dev, "configure" NL);
569
570 if (!link) {
571 out_be32(&p->mr1, in_be32(&p->mr1)
572 | EMAC_MR1_FDE | EMAC_MR1_ILE);
573 udelay(100);
574 } else if (emac_reset(dev) < 0)
575 return -ETIMEDOUT;
576
577 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
578 tah_reset(dev->tah_dev);
579
580 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
581 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
582
583 /* Default fifo sizes */
584 tx_size = dev->tx_fifo_size;
585 rx_size = dev->rx_fifo_size;
586
587 /* No link, force loopback */
588 if (!link)
589 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
590
591 /* Check for full duplex */
592 else if (dev->phy.duplex == DUPLEX_FULL)
593 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
594
595 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
596 dev->stop_timeout = STOP_TIMEOUT_10;
597 switch (dev->phy.speed) {
598 case SPEED_1000:
599 if (emac_phy_gpcs(dev->phy.mode)) {
600 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
601 (dev->phy.gpcs_address != 0xffffffff) ?
602 dev->phy.gpcs_address : dev->phy.address);
603
604 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
605 * identify this GPCS PHY later.
606 */
607 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
608 } else
609 mr1 |= EMAC_MR1_MF_1000;
610
611 /* Extended fifo sizes */
612 tx_size = dev->tx_fifo_size_gige;
613 rx_size = dev->rx_fifo_size_gige;
614
615 if (dev->ndev->mtu > ETH_DATA_LEN) {
616 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
617 mr1 |= EMAC4_MR1_JPSM;
618 else
619 mr1 |= EMAC_MR1_JPSM;
620 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
621 } else
622 dev->stop_timeout = STOP_TIMEOUT_1000;
623 break;
624 case SPEED_100:
625 mr1 |= EMAC_MR1_MF_100;
626 dev->stop_timeout = STOP_TIMEOUT_100;
627 break;
628 default: /* make gcc happy */
629 break;
630 }
631
632 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
633 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
634 dev->phy.speed);
635 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
636 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
637
638 /* on 40x erratum forces us to NOT use integrated flow control,
639 * let's hope it works on 44x ;)
640 */
641 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
642 dev->phy.duplex == DUPLEX_FULL) {
643 if (dev->phy.pause)
644 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
645 else if (dev->phy.asym_pause)
646 mr1 |= EMAC_MR1_APP;
647 }
648
649 /* Add base settings & fifo sizes & program MR1 */
650 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
651 out_be32(&p->mr1, mr1);
652
653 /* Set individual MAC address */
654 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
655 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
656 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
657 ndev->dev_addr[5]);
658
659 /* VLAN Tag Protocol ID */
660 out_be32(&p->vtpid, 0x8100);
661
662 /* Receive mode register */
663 r = emac_iff2rmr(ndev);
664 if (r & EMAC_RMR_MAE)
665 emac_hash_mc(dev);
666 out_be32(&p->rmr, r);
667
668 /* FIFOs thresholds */
669 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
670 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
671 tx_size / 2 / dev->fifo_entry_size);
672 else
673 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
674 tx_size / 2 / dev->fifo_entry_size);
675 out_be32(&p->tmr1, r);
676 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
677
678 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
679 there should be still enough space in FIFO to allow the our link
680 partner time to process this frame and also time to send PAUSE
681 frame itself.
682
683 Here is the worst case scenario for the RX FIFO "headroom"
684 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
685
686 1) One maximum-length frame on TX 1522 bytes
687 2) One PAUSE frame time 64 bytes
688 3) PAUSE frame decode time allowance 64 bytes
689 4) One maximum-length frame on RX 1522 bytes
690 5) Round-trip propagation delay of the link (100Mb) 15 bytes
691 ----------
692 3187 bytes
693
694 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
695 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
696 */
697 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
698 rx_size / 4 / dev->fifo_entry_size);
699 out_be32(&p->rwmr, r);
700
701 /* Set PAUSE timer to the maximum */
702 out_be32(&p->ptr, 0xffff);
703
704 /* IRQ sources */
705 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
706 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
707 EMAC_ISR_IRE | EMAC_ISR_TE;
708 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
709 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
710 EMAC4_ISR_RXOE | */;
711 out_be32(&p->iser, r);
712
713 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
714 if (emac_phy_gpcs(dev->phy.mode)) {
715 if (dev->phy.gpcs_address != 0xffffffff)
716 emac_mii_reset_gpcs(&dev->phy);
717 else
718 emac_mii_reset_phy(&dev->phy);
719 }
720
721 return 0;
722 }
723
724 static void emac_reinitialize(struct emac_instance *dev)
725 {
726 DBG(dev, "reinitialize" NL);
727
728 emac_netif_stop(dev);
729 if (!emac_configure(dev)) {
730 emac_tx_enable(dev);
731 emac_rx_enable(dev);
732 }
733 emac_netif_start(dev);
734 }
735
736 static void emac_full_tx_reset(struct emac_instance *dev)
737 {
738 DBG(dev, "full_tx_reset" NL);
739
740 emac_tx_disable(dev);
741 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
742 emac_clean_tx_ring(dev);
743 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
744
745 emac_configure(dev);
746
747 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
748 emac_tx_enable(dev);
749 emac_rx_enable(dev);
750 }
751
752 static void emac_reset_work(struct work_struct *work)
753 {
754 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
755
756 DBG(dev, "reset_work" NL);
757
758 mutex_lock(&dev->link_lock);
759 if (dev->opened) {
760 emac_netif_stop(dev);
761 emac_full_tx_reset(dev);
762 emac_netif_start(dev);
763 }
764 mutex_unlock(&dev->link_lock);
765 }
766
767 static void emac_tx_timeout(struct net_device *ndev)
768 {
769 struct emac_instance *dev = netdev_priv(ndev);
770
771 DBG(dev, "tx_timeout" NL);
772
773 schedule_work(&dev->reset_work);
774 }
775
776
777 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
778 {
779 int done = !!(stacr & EMAC_STACR_OC);
780
781 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
782 done = !done;
783
784 return done;
785 };
786
787 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
788 {
789 struct emac_regs __iomem *p = dev->emacp;
790 u32 r = 0;
791 int n, err = -ETIMEDOUT;
792
793 mutex_lock(&dev->mdio_lock);
794
795 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
796
797 /* Enable proper MDIO port */
798 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
799 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
800 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
801 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
802
803 /* Wait for management interface to become idle */
804 n = 20;
805 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
806 udelay(1);
807 if (!--n) {
808 DBG2(dev, " -> timeout wait idle\n");
809 goto bail;
810 }
811 }
812
813 /* Issue read command */
814 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
815 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
816 else
817 r = EMAC_STACR_BASE(dev->opb_bus_freq);
818 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
819 r |= EMAC_STACR_OC;
820 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
821 r |= EMACX_STACR_STAC_READ;
822 else
823 r |= EMAC_STACR_STAC_READ;
824 r |= (reg & EMAC_STACR_PRA_MASK)
825 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
826 out_be32(&p->stacr, r);
827
828 /* Wait for read to complete */
829 n = 200;
830 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
831 udelay(1);
832 if (!--n) {
833 DBG2(dev, " -> timeout wait complete\n");
834 goto bail;
835 }
836 }
837
838 if (unlikely(r & EMAC_STACR_PHYE)) {
839 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
840 err = -EREMOTEIO;
841 goto bail;
842 }
843
844 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
845
846 DBG2(dev, "mdio_read -> %04x" NL, r);
847 err = 0;
848 bail:
849 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
850 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
851 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
852 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
853 mutex_unlock(&dev->mdio_lock);
854
855 return err == 0 ? r : err;
856 }
857
858 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
859 u16 val)
860 {
861 struct emac_regs __iomem *p = dev->emacp;
862 u32 r = 0;
863 int n, err = -ETIMEDOUT;
864
865 mutex_lock(&dev->mdio_lock);
866
867 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
868
869 /* Enable proper MDIO port */
870 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
871 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
872 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
873 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
874
875 /* Wait for management interface to be idle */
876 n = 20;
877 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
878 udelay(1);
879 if (!--n) {
880 DBG2(dev, " -> timeout wait idle\n");
881 goto bail;
882 }
883 }
884
885 /* Issue write command */
886 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
887 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
888 else
889 r = EMAC_STACR_BASE(dev->opb_bus_freq);
890 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
891 r |= EMAC_STACR_OC;
892 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
893 r |= EMACX_STACR_STAC_WRITE;
894 else
895 r |= EMAC_STACR_STAC_WRITE;
896 r |= (reg & EMAC_STACR_PRA_MASK) |
897 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
898 (val << EMAC_STACR_PHYD_SHIFT);
899 out_be32(&p->stacr, r);
900
901 /* Wait for write to complete */
902 n = 200;
903 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
904 udelay(1);
905 if (!--n) {
906 DBG2(dev, " -> timeout wait complete\n");
907 goto bail;
908 }
909 }
910 err = 0;
911 bail:
912 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
913 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
914 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
915 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
916 mutex_unlock(&dev->mdio_lock);
917 }
918
919 static int emac_mdio_read(struct net_device *ndev, int id, int reg)
920 {
921 struct emac_instance *dev = netdev_priv(ndev);
922 int res;
923
924 res = __emac_mdio_read((dev->mdio_instance &&
925 dev->phy.gpcs_address != id) ?
926 dev->mdio_instance : dev,
927 (u8) id, (u8) reg);
928 return res;
929 }
930
931 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
932 {
933 struct emac_instance *dev = netdev_priv(ndev);
934
935 __emac_mdio_write((dev->mdio_instance &&
936 dev->phy.gpcs_address != id) ?
937 dev->mdio_instance : dev,
938 (u8) id, (u8) reg, (u16) val);
939 }
940
941 /* Tx lock BH */
942 static void __emac_set_multicast_list(struct emac_instance *dev)
943 {
944 struct emac_regs __iomem *p = dev->emacp;
945 u32 rmr = emac_iff2rmr(dev->ndev);
946
947 DBG(dev, "__multicast %08x" NL, rmr);
948
949 /* I decided to relax register access rules here to avoid
950 * full EMAC reset.
951 *
952 * There is a real problem with EMAC4 core if we use MWSW_001 bit
953 * in MR1 register and do a full EMAC reset.
954 * One TX BD status update is delayed and, after EMAC reset, it
955 * never happens, resulting in TX hung (it'll be recovered by TX
956 * timeout handler eventually, but this is just gross).
957 * So we either have to do full TX reset or try to cheat here :)
958 *
959 * The only required change is to RX mode register, so I *think* all
960 * we need is just to stop RX channel. This seems to work on all
961 * tested SoCs. --ebs
962 *
963 * If we need the full reset, we might just trigger the workqueue
964 * and do it async... a bit nasty but should work --BenH
965 */
966 dev->mcast_pending = 0;
967 emac_rx_disable(dev);
968 if (rmr & EMAC_RMR_MAE)
969 emac_hash_mc(dev);
970 out_be32(&p->rmr, rmr);
971 emac_rx_enable(dev);
972 }
973
974 /* Tx lock BH */
975 static void emac_set_multicast_list(struct net_device *ndev)
976 {
977 struct emac_instance *dev = netdev_priv(ndev);
978
979 DBG(dev, "multicast" NL);
980
981 BUG_ON(!netif_running(dev->ndev));
982
983 if (dev->no_mcast) {
984 dev->mcast_pending = 1;
985 return;
986 }
987 __emac_set_multicast_list(dev);
988 }
989
990 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
991 {
992 int rx_sync_size = emac_rx_sync_size(new_mtu);
993 int rx_skb_size = emac_rx_skb_size(new_mtu);
994 int i, ret = 0;
995 int mr1_jumbo_bit_change = 0;
996
997 mutex_lock(&dev->link_lock);
998 emac_netif_stop(dev);
999 emac_rx_disable(dev);
1000 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1001
1002 if (dev->rx_sg_skb) {
1003 ++dev->estats.rx_dropped_resize;
1004 dev_kfree_skb(dev->rx_sg_skb);
1005 dev->rx_sg_skb = NULL;
1006 }
1007
1008 /* Make a first pass over RX ring and mark BDs ready, dropping
1009 * non-processed packets on the way. We need this as a separate pass
1010 * to simplify error recovery in the case of allocation failure later.
1011 */
1012 for (i = 0; i < NUM_RX_BUFF; ++i) {
1013 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
1014 ++dev->estats.rx_dropped_resize;
1015
1016 dev->rx_desc[i].data_len = 0;
1017 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
1018 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1019 }
1020
1021 /* Reallocate RX ring only if bigger skb buffers are required */
1022 if (rx_skb_size <= dev->rx_skb_size)
1023 goto skip;
1024
1025 /* Second pass, allocate new skbs */
1026 for (i = 0; i < NUM_RX_BUFF; ++i) {
1027 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
1028 if (!skb) {
1029 ret = -ENOMEM;
1030 goto oom;
1031 }
1032
1033 BUG_ON(!dev->rx_skb[i]);
1034 dev_kfree_skb(dev->rx_skb[i]);
1035
1036 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1037 dev->rx_desc[i].data_ptr =
1038 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1039 DMA_FROM_DEVICE) + 2;
1040 dev->rx_skb[i] = skb;
1041 }
1042 skip:
1043 /* Check if we need to change "Jumbo" bit in MR1 */
1044 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
1045 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
1046 (dev->ndev->mtu > ETH_DATA_LEN);
1047 } else {
1048 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
1049 (dev->ndev->mtu > ETH_DATA_LEN);
1050 }
1051
1052 if (mr1_jumbo_bit_change) {
1053 /* This is to prevent starting RX channel in emac_rx_enable() */
1054 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1055
1056 dev->ndev->mtu = new_mtu;
1057 emac_full_tx_reset(dev);
1058 }
1059
1060 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1061 oom:
1062 /* Restart RX */
1063 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1064 dev->rx_slot = 0;
1065 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1066 emac_rx_enable(dev);
1067 emac_netif_start(dev);
1068 mutex_unlock(&dev->link_lock);
1069
1070 return ret;
1071 }
1072
1073 /* Process ctx, rtnl_lock semaphore */
1074 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1075 {
1076 struct emac_instance *dev = netdev_priv(ndev);
1077 int ret = 0;
1078
1079 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1080 return -EINVAL;
1081
1082 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1083
1084 if (netif_running(ndev)) {
1085 /* Check if we really need to reinitialize RX ring */
1086 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1087 ret = emac_resize_rx_ring(dev, new_mtu);
1088 }
1089
1090 if (!ret) {
1091 ndev->mtu = new_mtu;
1092 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1093 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1094 }
1095
1096 return ret;
1097 }
1098
1099 static void emac_clean_tx_ring(struct emac_instance *dev)
1100 {
1101 int i;
1102
1103 for (i = 0; i < NUM_TX_BUFF; ++i) {
1104 if (dev->tx_skb[i]) {
1105 dev_kfree_skb(dev->tx_skb[i]);
1106 dev->tx_skb[i] = NULL;
1107 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1108 ++dev->estats.tx_dropped;
1109 }
1110 dev->tx_desc[i].ctrl = 0;
1111 dev->tx_desc[i].data_ptr = 0;
1112 }
1113 }
1114
1115 static void emac_clean_rx_ring(struct emac_instance *dev)
1116 {
1117 int i;
1118
1119 for (i = 0; i < NUM_RX_BUFF; ++i)
1120 if (dev->rx_skb[i]) {
1121 dev->rx_desc[i].ctrl = 0;
1122 dev_kfree_skb(dev->rx_skb[i]);
1123 dev->rx_skb[i] = NULL;
1124 dev->rx_desc[i].data_ptr = 0;
1125 }
1126
1127 if (dev->rx_sg_skb) {
1128 dev_kfree_skb(dev->rx_sg_skb);
1129 dev->rx_sg_skb = NULL;
1130 }
1131 }
1132
1133 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1134 gfp_t flags)
1135 {
1136 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1137 if (unlikely(!skb))
1138 return -ENOMEM;
1139
1140 dev->rx_skb[slot] = skb;
1141 dev->rx_desc[slot].data_len = 0;
1142
1143 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1144 dev->rx_desc[slot].data_ptr =
1145 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1146 DMA_FROM_DEVICE) + 2;
1147 wmb();
1148 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1149 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1150
1151 return 0;
1152 }
1153
1154 static void emac_print_link_status(struct emac_instance *dev)
1155 {
1156 if (netif_carrier_ok(dev->ndev))
1157 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1158 dev->ndev->name, dev->phy.speed,
1159 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1160 dev->phy.pause ? ", pause enabled" :
1161 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1162 else
1163 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1164 }
1165
1166 /* Process ctx, rtnl_lock semaphore */
1167 static int emac_open(struct net_device *ndev)
1168 {
1169 struct emac_instance *dev = netdev_priv(ndev);
1170 int err, i;
1171
1172 DBG(dev, "open" NL);
1173
1174 /* Setup error IRQ handler */
1175 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1176 if (err) {
1177 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1178 ndev->name, dev->emac_irq);
1179 return err;
1180 }
1181
1182 /* Allocate RX ring */
1183 for (i = 0; i < NUM_RX_BUFF; ++i)
1184 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1185 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1186 ndev->name);
1187 goto oom;
1188 }
1189
1190 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1191 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1192 dev->rx_sg_skb = NULL;
1193
1194 mutex_lock(&dev->link_lock);
1195 dev->opened = 1;
1196
1197 /* Start PHY polling now.
1198 */
1199 if (dev->phy.address >= 0) {
1200 int link_poll_interval;
1201 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1202 dev->phy.def->ops->read_link(&dev->phy);
1203 emac_rx_clk_default(dev);
1204 netif_carrier_on(dev->ndev);
1205 link_poll_interval = PHY_POLL_LINK_ON;
1206 } else {
1207 emac_rx_clk_tx(dev);
1208 netif_carrier_off(dev->ndev);
1209 link_poll_interval = PHY_POLL_LINK_OFF;
1210 }
1211 dev->link_polling = 1;
1212 wmb();
1213 schedule_delayed_work(&dev->link_work, link_poll_interval);
1214 emac_print_link_status(dev);
1215 } else
1216 netif_carrier_on(dev->ndev);
1217
1218 /* Required for Pause packet support in EMAC */
1219 dev_mc_add_global(ndev, default_mcast_addr);
1220
1221 emac_configure(dev);
1222 mal_poll_add(dev->mal, &dev->commac);
1223 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1224 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1225 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1226 emac_tx_enable(dev);
1227 emac_rx_enable(dev);
1228 emac_netif_start(dev);
1229
1230 mutex_unlock(&dev->link_lock);
1231
1232 return 0;
1233 oom:
1234 emac_clean_rx_ring(dev);
1235 free_irq(dev->emac_irq, dev);
1236
1237 return -ENOMEM;
1238 }
1239
1240 /* BHs disabled */
1241 #if 0
1242 static int emac_link_differs(struct emac_instance *dev)
1243 {
1244 u32 r = in_be32(&dev->emacp->mr1);
1245
1246 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1247 int speed, pause, asym_pause;
1248
1249 if (r & EMAC_MR1_MF_1000)
1250 speed = SPEED_1000;
1251 else if (r & EMAC_MR1_MF_100)
1252 speed = SPEED_100;
1253 else
1254 speed = SPEED_10;
1255
1256 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1257 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1258 pause = 1;
1259 asym_pause = 0;
1260 break;
1261 case EMAC_MR1_APP:
1262 pause = 0;
1263 asym_pause = 1;
1264 break;
1265 default:
1266 pause = asym_pause = 0;
1267 }
1268 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1269 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1270 }
1271 #endif
1272
1273 static void emac_link_timer(struct work_struct *work)
1274 {
1275 struct emac_instance *dev =
1276 container_of(to_delayed_work(work),
1277 struct emac_instance, link_work);
1278 int link_poll_interval;
1279
1280 mutex_lock(&dev->link_lock);
1281 DBG2(dev, "link timer" NL);
1282
1283 if (!dev->opened)
1284 goto bail;
1285
1286 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1287 if (!netif_carrier_ok(dev->ndev)) {
1288 emac_rx_clk_default(dev);
1289 /* Get new link parameters */
1290 dev->phy.def->ops->read_link(&dev->phy);
1291
1292 netif_carrier_on(dev->ndev);
1293 emac_netif_stop(dev);
1294 emac_full_tx_reset(dev);
1295 emac_netif_start(dev);
1296 emac_print_link_status(dev);
1297 }
1298 link_poll_interval = PHY_POLL_LINK_ON;
1299 } else {
1300 if (netif_carrier_ok(dev->ndev)) {
1301 emac_rx_clk_tx(dev);
1302 netif_carrier_off(dev->ndev);
1303 netif_tx_disable(dev->ndev);
1304 emac_reinitialize(dev);
1305 emac_print_link_status(dev);
1306 }
1307 link_poll_interval = PHY_POLL_LINK_OFF;
1308 }
1309 schedule_delayed_work(&dev->link_work, link_poll_interval);
1310 bail:
1311 mutex_unlock(&dev->link_lock);
1312 }
1313
1314 static void emac_force_link_update(struct emac_instance *dev)
1315 {
1316 netif_carrier_off(dev->ndev);
1317 smp_rmb();
1318 if (dev->link_polling) {
1319 cancel_delayed_work_sync(&dev->link_work);
1320 if (dev->link_polling)
1321 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1322 }
1323 }
1324
1325 /* Process ctx, rtnl_lock semaphore */
1326 static int emac_close(struct net_device *ndev)
1327 {
1328 struct emac_instance *dev = netdev_priv(ndev);
1329
1330 DBG(dev, "close" NL);
1331
1332 if (dev->phy.address >= 0) {
1333 dev->link_polling = 0;
1334 cancel_delayed_work_sync(&dev->link_work);
1335 }
1336 mutex_lock(&dev->link_lock);
1337 emac_netif_stop(dev);
1338 dev->opened = 0;
1339 mutex_unlock(&dev->link_lock);
1340
1341 emac_rx_disable(dev);
1342 emac_tx_disable(dev);
1343 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1344 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1345 mal_poll_del(dev->mal, &dev->commac);
1346
1347 emac_clean_tx_ring(dev);
1348 emac_clean_rx_ring(dev);
1349
1350 free_irq(dev->emac_irq, dev);
1351
1352 netif_carrier_off(ndev);
1353
1354 return 0;
1355 }
1356
1357 static inline u16 emac_tx_csum(struct emac_instance *dev,
1358 struct sk_buff *skb)
1359 {
1360 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1361 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1362 ++dev->stats.tx_packets_csum;
1363 return EMAC_TX_CTRL_TAH_CSUM;
1364 }
1365 return 0;
1366 }
1367
1368 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1369 {
1370 struct emac_regs __iomem *p = dev->emacp;
1371 struct net_device *ndev = dev->ndev;
1372
1373 /* Send the packet out. If the if makes a significant perf
1374 * difference, then we can store the TMR0 value in "dev"
1375 * instead
1376 */
1377 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1378 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1379 else
1380 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1381
1382 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1383 netif_stop_queue(ndev);
1384 DBG2(dev, "stopped TX queue" NL);
1385 }
1386
1387 ndev->trans_start = jiffies;
1388 ++dev->stats.tx_packets;
1389 dev->stats.tx_bytes += len;
1390
1391 return NETDEV_TX_OK;
1392 }
1393
1394 /* Tx lock BH */
1395 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1396 {
1397 struct emac_instance *dev = netdev_priv(ndev);
1398 unsigned int len = skb->len;
1399 int slot;
1400
1401 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1402 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1403
1404 slot = dev->tx_slot++;
1405 if (dev->tx_slot == NUM_TX_BUFF) {
1406 dev->tx_slot = 0;
1407 ctrl |= MAL_TX_CTRL_WRAP;
1408 }
1409
1410 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1411
1412 dev->tx_skb[slot] = skb;
1413 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1414 skb->data, len,
1415 DMA_TO_DEVICE);
1416 dev->tx_desc[slot].data_len = (u16) len;
1417 wmb();
1418 dev->tx_desc[slot].ctrl = ctrl;
1419
1420 return emac_xmit_finish(dev, len);
1421 }
1422
1423 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1424 u32 pd, int len, int last, u16 base_ctrl)
1425 {
1426 while (1) {
1427 u16 ctrl = base_ctrl;
1428 int chunk = min(len, MAL_MAX_TX_SIZE);
1429 len -= chunk;
1430
1431 slot = (slot + 1) % NUM_TX_BUFF;
1432
1433 if (last && !len)
1434 ctrl |= MAL_TX_CTRL_LAST;
1435 if (slot == NUM_TX_BUFF - 1)
1436 ctrl |= MAL_TX_CTRL_WRAP;
1437
1438 dev->tx_skb[slot] = NULL;
1439 dev->tx_desc[slot].data_ptr = pd;
1440 dev->tx_desc[slot].data_len = (u16) chunk;
1441 dev->tx_desc[slot].ctrl = ctrl;
1442 ++dev->tx_cnt;
1443
1444 if (!len)
1445 break;
1446
1447 pd += chunk;
1448 }
1449 return slot;
1450 }
1451
1452 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1453 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1454 {
1455 struct emac_instance *dev = netdev_priv(ndev);
1456 int nr_frags = skb_shinfo(skb)->nr_frags;
1457 int len = skb->len, chunk;
1458 int slot, i;
1459 u16 ctrl;
1460 u32 pd;
1461
1462 /* This is common "fast" path */
1463 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1464 return emac_start_xmit(skb, ndev);
1465
1466 len -= skb->data_len;
1467
1468 /* Note, this is only an *estimation*, we can still run out of empty
1469 * slots because of the additional fragmentation into
1470 * MAL_MAX_TX_SIZE-sized chunks
1471 */
1472 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1473 goto stop_queue;
1474
1475 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1476 emac_tx_csum(dev, skb);
1477 slot = dev->tx_slot;
1478
1479 /* skb data */
1480 dev->tx_skb[slot] = NULL;
1481 chunk = min(len, MAL_MAX_TX_SIZE);
1482 dev->tx_desc[slot].data_ptr = pd =
1483 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1484 dev->tx_desc[slot].data_len = (u16) chunk;
1485 len -= chunk;
1486 if (unlikely(len))
1487 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1488 ctrl);
1489 /* skb fragments */
1490 for (i = 0; i < nr_frags; ++i) {
1491 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1492 len = skb_frag_size(frag);
1493
1494 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1495 goto undo_frame;
1496
1497 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1498 DMA_TO_DEVICE);
1499
1500 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1501 ctrl);
1502 }
1503
1504 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1505
1506 /* Attach skb to the last slot so we don't release it too early */
1507 dev->tx_skb[slot] = skb;
1508
1509 /* Send the packet out */
1510 if (dev->tx_slot == NUM_TX_BUFF - 1)
1511 ctrl |= MAL_TX_CTRL_WRAP;
1512 wmb();
1513 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1514 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1515
1516 return emac_xmit_finish(dev, skb->len);
1517
1518 undo_frame:
1519 /* Well, too bad. Our previous estimation was overly optimistic.
1520 * Undo everything.
1521 */
1522 while (slot != dev->tx_slot) {
1523 dev->tx_desc[slot].ctrl = 0;
1524 --dev->tx_cnt;
1525 if (--slot < 0)
1526 slot = NUM_TX_BUFF - 1;
1527 }
1528 ++dev->estats.tx_undo;
1529
1530 stop_queue:
1531 netif_stop_queue(ndev);
1532 DBG2(dev, "stopped TX queue" NL);
1533 return NETDEV_TX_BUSY;
1534 }
1535
1536 /* Tx lock BHs */
1537 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1538 {
1539 struct emac_error_stats *st = &dev->estats;
1540
1541 DBG(dev, "BD TX error %04x" NL, ctrl);
1542
1543 ++st->tx_bd_errors;
1544 if (ctrl & EMAC_TX_ST_BFCS)
1545 ++st->tx_bd_bad_fcs;
1546 if (ctrl & EMAC_TX_ST_LCS)
1547 ++st->tx_bd_carrier_loss;
1548 if (ctrl & EMAC_TX_ST_ED)
1549 ++st->tx_bd_excessive_deferral;
1550 if (ctrl & EMAC_TX_ST_EC)
1551 ++st->tx_bd_excessive_collisions;
1552 if (ctrl & EMAC_TX_ST_LC)
1553 ++st->tx_bd_late_collision;
1554 if (ctrl & EMAC_TX_ST_MC)
1555 ++st->tx_bd_multple_collisions;
1556 if (ctrl & EMAC_TX_ST_SC)
1557 ++st->tx_bd_single_collision;
1558 if (ctrl & EMAC_TX_ST_UR)
1559 ++st->tx_bd_underrun;
1560 if (ctrl & EMAC_TX_ST_SQE)
1561 ++st->tx_bd_sqe;
1562 }
1563
1564 static void emac_poll_tx(void *param)
1565 {
1566 struct emac_instance *dev = param;
1567 u32 bad_mask;
1568
1569 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1570
1571 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1572 bad_mask = EMAC_IS_BAD_TX_TAH;
1573 else
1574 bad_mask = EMAC_IS_BAD_TX;
1575
1576 netif_tx_lock_bh(dev->ndev);
1577 if (dev->tx_cnt) {
1578 u16 ctrl;
1579 int slot = dev->ack_slot, n = 0;
1580 again:
1581 ctrl = dev->tx_desc[slot].ctrl;
1582 if (!(ctrl & MAL_TX_CTRL_READY)) {
1583 struct sk_buff *skb = dev->tx_skb[slot];
1584 ++n;
1585
1586 if (skb) {
1587 dev_kfree_skb(skb);
1588 dev->tx_skb[slot] = NULL;
1589 }
1590 slot = (slot + 1) % NUM_TX_BUFF;
1591
1592 if (unlikely(ctrl & bad_mask))
1593 emac_parse_tx_error(dev, ctrl);
1594
1595 if (--dev->tx_cnt)
1596 goto again;
1597 }
1598 if (n) {
1599 dev->ack_slot = slot;
1600 if (netif_queue_stopped(dev->ndev) &&
1601 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1602 netif_wake_queue(dev->ndev);
1603
1604 DBG2(dev, "tx %d pkts" NL, n);
1605 }
1606 }
1607 netif_tx_unlock_bh(dev->ndev);
1608 }
1609
1610 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1611 int len)
1612 {
1613 struct sk_buff *skb = dev->rx_skb[slot];
1614
1615 DBG2(dev, "recycle %d %d" NL, slot, len);
1616
1617 if (len)
1618 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1619 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1620
1621 dev->rx_desc[slot].data_len = 0;
1622 wmb();
1623 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1624 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1625 }
1626
1627 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1628 {
1629 struct emac_error_stats *st = &dev->estats;
1630
1631 DBG(dev, "BD RX error %04x" NL, ctrl);
1632
1633 ++st->rx_bd_errors;
1634 if (ctrl & EMAC_RX_ST_OE)
1635 ++st->rx_bd_overrun;
1636 if (ctrl & EMAC_RX_ST_BP)
1637 ++st->rx_bd_bad_packet;
1638 if (ctrl & EMAC_RX_ST_RP)
1639 ++st->rx_bd_runt_packet;
1640 if (ctrl & EMAC_RX_ST_SE)
1641 ++st->rx_bd_short_event;
1642 if (ctrl & EMAC_RX_ST_AE)
1643 ++st->rx_bd_alignment_error;
1644 if (ctrl & EMAC_RX_ST_BFCS)
1645 ++st->rx_bd_bad_fcs;
1646 if (ctrl & EMAC_RX_ST_PTL)
1647 ++st->rx_bd_packet_too_long;
1648 if (ctrl & EMAC_RX_ST_ORE)
1649 ++st->rx_bd_out_of_range;
1650 if (ctrl & EMAC_RX_ST_IRE)
1651 ++st->rx_bd_in_range;
1652 }
1653
1654 static inline void emac_rx_csum(struct emac_instance *dev,
1655 struct sk_buff *skb, u16 ctrl)
1656 {
1657 #ifdef CONFIG_IBM_EMAC_TAH
1658 if (!ctrl && dev->tah_dev) {
1659 skb->ip_summed = CHECKSUM_UNNECESSARY;
1660 ++dev->stats.rx_packets_csum;
1661 }
1662 #endif
1663 }
1664
1665 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1666 {
1667 if (likely(dev->rx_sg_skb != NULL)) {
1668 int len = dev->rx_desc[slot].data_len;
1669 int tot_len = dev->rx_sg_skb->len + len;
1670
1671 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1672 ++dev->estats.rx_dropped_mtu;
1673 dev_kfree_skb(dev->rx_sg_skb);
1674 dev->rx_sg_skb = NULL;
1675 } else {
1676 cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
1677 dev->rx_skb[slot]->data, len);
1678 skb_put(dev->rx_sg_skb, len);
1679 emac_recycle_rx_skb(dev, slot, len);
1680 return 0;
1681 }
1682 }
1683 emac_recycle_rx_skb(dev, slot, 0);
1684 return -1;
1685 }
1686
1687 /* NAPI poll context */
1688 static int emac_poll_rx(void *param, int budget)
1689 {
1690 struct emac_instance *dev = param;
1691 int slot = dev->rx_slot, received = 0;
1692
1693 DBG2(dev, "poll_rx(%d)" NL, budget);
1694
1695 again:
1696 while (budget > 0) {
1697 int len;
1698 struct sk_buff *skb;
1699 u16 ctrl = dev->rx_desc[slot].ctrl;
1700
1701 if (ctrl & MAL_RX_CTRL_EMPTY)
1702 break;
1703
1704 skb = dev->rx_skb[slot];
1705 mb();
1706 len = dev->rx_desc[slot].data_len;
1707
1708 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1709 goto sg;
1710
1711 ctrl &= EMAC_BAD_RX_MASK;
1712 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1713 emac_parse_rx_error(dev, ctrl);
1714 ++dev->estats.rx_dropped_error;
1715 emac_recycle_rx_skb(dev, slot, 0);
1716 len = 0;
1717 goto next;
1718 }
1719
1720 if (len < ETH_HLEN) {
1721 ++dev->estats.rx_dropped_stack;
1722 emac_recycle_rx_skb(dev, slot, len);
1723 goto next;
1724 }
1725
1726 if (len && len < EMAC_RX_COPY_THRESH) {
1727 struct sk_buff *copy_skb =
1728 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1729 if (unlikely(!copy_skb))
1730 goto oom;
1731
1732 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1733 cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
1734 len + 2);
1735 emac_recycle_rx_skb(dev, slot, len);
1736 skb = copy_skb;
1737 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1738 goto oom;
1739
1740 skb_put(skb, len);
1741 push_packet:
1742 skb->protocol = eth_type_trans(skb, dev->ndev);
1743 emac_rx_csum(dev, skb, ctrl);
1744
1745 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1746 ++dev->estats.rx_dropped_stack;
1747 next:
1748 ++dev->stats.rx_packets;
1749 skip:
1750 dev->stats.rx_bytes += len;
1751 slot = (slot + 1) % NUM_RX_BUFF;
1752 --budget;
1753 ++received;
1754 continue;
1755 sg:
1756 if (ctrl & MAL_RX_CTRL_FIRST) {
1757 BUG_ON(dev->rx_sg_skb);
1758 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1759 DBG(dev, "rx OOM %d" NL, slot);
1760 ++dev->estats.rx_dropped_oom;
1761 emac_recycle_rx_skb(dev, slot, 0);
1762 } else {
1763 dev->rx_sg_skb = skb;
1764 skb_put(skb, len);
1765 }
1766 } else if (!emac_rx_sg_append(dev, slot) &&
1767 (ctrl & MAL_RX_CTRL_LAST)) {
1768
1769 skb = dev->rx_sg_skb;
1770 dev->rx_sg_skb = NULL;
1771
1772 ctrl &= EMAC_BAD_RX_MASK;
1773 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1774 emac_parse_rx_error(dev, ctrl);
1775 ++dev->estats.rx_dropped_error;
1776 dev_kfree_skb(skb);
1777 len = 0;
1778 } else
1779 goto push_packet;
1780 }
1781 goto skip;
1782 oom:
1783 DBG(dev, "rx OOM %d" NL, slot);
1784 /* Drop the packet and recycle skb */
1785 ++dev->estats.rx_dropped_oom;
1786 emac_recycle_rx_skb(dev, slot, 0);
1787 goto next;
1788 }
1789
1790 if (received) {
1791 DBG2(dev, "rx %d BDs" NL, received);
1792 dev->rx_slot = slot;
1793 }
1794
1795 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1796 mb();
1797 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1798 DBG2(dev, "rx restart" NL);
1799 received = 0;
1800 goto again;
1801 }
1802
1803 if (dev->rx_sg_skb) {
1804 DBG2(dev, "dropping partial rx packet" NL);
1805 ++dev->estats.rx_dropped_error;
1806 dev_kfree_skb(dev->rx_sg_skb);
1807 dev->rx_sg_skb = NULL;
1808 }
1809
1810 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1811 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1812 emac_rx_enable(dev);
1813 dev->rx_slot = 0;
1814 }
1815 return received;
1816 }
1817
1818 /* NAPI poll context */
1819 static int emac_peek_rx(void *param)
1820 {
1821 struct emac_instance *dev = param;
1822
1823 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1824 }
1825
1826 /* NAPI poll context */
1827 static int emac_peek_rx_sg(void *param)
1828 {
1829 struct emac_instance *dev = param;
1830
1831 int slot = dev->rx_slot;
1832 while (1) {
1833 u16 ctrl = dev->rx_desc[slot].ctrl;
1834 if (ctrl & MAL_RX_CTRL_EMPTY)
1835 return 0;
1836 else if (ctrl & MAL_RX_CTRL_LAST)
1837 return 1;
1838
1839 slot = (slot + 1) % NUM_RX_BUFF;
1840
1841 /* I'm just being paranoid here :) */
1842 if (unlikely(slot == dev->rx_slot))
1843 return 0;
1844 }
1845 }
1846
1847 /* Hard IRQ */
1848 static void emac_rxde(void *param)
1849 {
1850 struct emac_instance *dev = param;
1851
1852 ++dev->estats.rx_stopped;
1853 emac_rx_disable_async(dev);
1854 }
1855
1856 /* Hard IRQ */
1857 static irqreturn_t emac_irq(int irq, void *dev_instance)
1858 {
1859 struct emac_instance *dev = dev_instance;
1860 struct emac_regs __iomem *p = dev->emacp;
1861 struct emac_error_stats *st = &dev->estats;
1862 u32 isr;
1863
1864 spin_lock(&dev->lock);
1865
1866 isr = in_be32(&p->isr);
1867 out_be32(&p->isr, isr);
1868
1869 DBG(dev, "isr = %08x" NL, isr);
1870
1871 if (isr & EMAC4_ISR_TXPE)
1872 ++st->tx_parity;
1873 if (isr & EMAC4_ISR_RXPE)
1874 ++st->rx_parity;
1875 if (isr & EMAC4_ISR_TXUE)
1876 ++st->tx_underrun;
1877 if (isr & EMAC4_ISR_RXOE)
1878 ++st->rx_fifo_overrun;
1879 if (isr & EMAC_ISR_OVR)
1880 ++st->rx_overrun;
1881 if (isr & EMAC_ISR_BP)
1882 ++st->rx_bad_packet;
1883 if (isr & EMAC_ISR_RP)
1884 ++st->rx_runt_packet;
1885 if (isr & EMAC_ISR_SE)
1886 ++st->rx_short_event;
1887 if (isr & EMAC_ISR_ALE)
1888 ++st->rx_alignment_error;
1889 if (isr & EMAC_ISR_BFCS)
1890 ++st->rx_bad_fcs;
1891 if (isr & EMAC_ISR_PTLE)
1892 ++st->rx_packet_too_long;
1893 if (isr & EMAC_ISR_ORE)
1894 ++st->rx_out_of_range;
1895 if (isr & EMAC_ISR_IRE)
1896 ++st->rx_in_range;
1897 if (isr & EMAC_ISR_SQE)
1898 ++st->tx_sqe;
1899 if (isr & EMAC_ISR_TE)
1900 ++st->tx_errors;
1901
1902 spin_unlock(&dev->lock);
1903
1904 return IRQ_HANDLED;
1905 }
1906
1907 static struct net_device_stats *emac_stats(struct net_device *ndev)
1908 {
1909 struct emac_instance *dev = netdev_priv(ndev);
1910 struct emac_stats *st = &dev->stats;
1911 struct emac_error_stats *est = &dev->estats;
1912 struct net_device_stats *nst = &dev->nstats;
1913 unsigned long flags;
1914
1915 DBG2(dev, "stats" NL);
1916
1917 /* Compute "legacy" statistics */
1918 spin_lock_irqsave(&dev->lock, flags);
1919 nst->rx_packets = (unsigned long)st->rx_packets;
1920 nst->rx_bytes = (unsigned long)st->rx_bytes;
1921 nst->tx_packets = (unsigned long)st->tx_packets;
1922 nst->tx_bytes = (unsigned long)st->tx_bytes;
1923 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1924 est->rx_dropped_error +
1925 est->rx_dropped_resize +
1926 est->rx_dropped_mtu);
1927 nst->tx_dropped = (unsigned long)est->tx_dropped;
1928
1929 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1930 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1931 est->rx_fifo_overrun +
1932 est->rx_overrun);
1933 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1934 est->rx_alignment_error);
1935 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1936 est->rx_bad_fcs);
1937 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1938 est->rx_bd_short_event +
1939 est->rx_bd_packet_too_long +
1940 est->rx_bd_out_of_range +
1941 est->rx_bd_in_range +
1942 est->rx_runt_packet +
1943 est->rx_short_event +
1944 est->rx_packet_too_long +
1945 est->rx_out_of_range +
1946 est->rx_in_range);
1947
1948 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1949 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1950 est->tx_underrun);
1951 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1952 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1953 est->tx_bd_excessive_collisions +
1954 est->tx_bd_late_collision +
1955 est->tx_bd_multple_collisions);
1956 spin_unlock_irqrestore(&dev->lock, flags);
1957 return nst;
1958 }
1959
1960 static struct mal_commac_ops emac_commac_ops = {
1961 .poll_tx = &emac_poll_tx,
1962 .poll_rx = &emac_poll_rx,
1963 .peek_rx = &emac_peek_rx,
1964 .rxde = &emac_rxde,
1965 };
1966
1967 static struct mal_commac_ops emac_commac_sg_ops = {
1968 .poll_tx = &emac_poll_tx,
1969 .poll_rx = &emac_poll_rx,
1970 .peek_rx = &emac_peek_rx_sg,
1971 .rxde = &emac_rxde,
1972 };
1973
1974 /* Ethtool support */
1975 static int emac_ethtool_get_settings(struct net_device *ndev,
1976 struct ethtool_cmd *cmd)
1977 {
1978 struct emac_instance *dev = netdev_priv(ndev);
1979
1980 cmd->supported = dev->phy.features;
1981 cmd->port = PORT_MII;
1982 cmd->phy_address = dev->phy.address;
1983 cmd->transceiver =
1984 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
1985
1986 mutex_lock(&dev->link_lock);
1987 cmd->advertising = dev->phy.advertising;
1988 cmd->autoneg = dev->phy.autoneg;
1989 cmd->speed = dev->phy.speed;
1990 cmd->duplex = dev->phy.duplex;
1991 mutex_unlock(&dev->link_lock);
1992
1993 return 0;
1994 }
1995
1996 static int emac_ethtool_set_settings(struct net_device *ndev,
1997 struct ethtool_cmd *cmd)
1998 {
1999 struct emac_instance *dev = netdev_priv(ndev);
2000 u32 f = dev->phy.features;
2001
2002 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
2003 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
2004
2005 /* Basic sanity checks */
2006 if (dev->phy.address < 0)
2007 return -EOPNOTSUPP;
2008 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
2009 return -EINVAL;
2010 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
2011 return -EINVAL;
2012 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
2013 return -EINVAL;
2014
2015 if (cmd->autoneg == AUTONEG_DISABLE) {
2016 switch (cmd->speed) {
2017 case SPEED_10:
2018 if (cmd->duplex == DUPLEX_HALF &&
2019 !(f & SUPPORTED_10baseT_Half))
2020 return -EINVAL;
2021 if (cmd->duplex == DUPLEX_FULL &&
2022 !(f & SUPPORTED_10baseT_Full))
2023 return -EINVAL;
2024 break;
2025 case SPEED_100:
2026 if (cmd->duplex == DUPLEX_HALF &&
2027 !(f & SUPPORTED_100baseT_Half))
2028 return -EINVAL;
2029 if (cmd->duplex == DUPLEX_FULL &&
2030 !(f & SUPPORTED_100baseT_Full))
2031 return -EINVAL;
2032 break;
2033 case SPEED_1000:
2034 if (cmd->duplex == DUPLEX_HALF &&
2035 !(f & SUPPORTED_1000baseT_Half))
2036 return -EINVAL;
2037 if (cmd->duplex == DUPLEX_FULL &&
2038 !(f & SUPPORTED_1000baseT_Full))
2039 return -EINVAL;
2040 break;
2041 default:
2042 return -EINVAL;
2043 }
2044
2045 mutex_lock(&dev->link_lock);
2046 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2047 cmd->duplex);
2048 mutex_unlock(&dev->link_lock);
2049
2050 } else {
2051 if (!(f & SUPPORTED_Autoneg))
2052 return -EINVAL;
2053
2054 mutex_lock(&dev->link_lock);
2055 dev->phy.def->ops->setup_aneg(&dev->phy,
2056 (cmd->advertising & f) |
2057 (dev->phy.advertising &
2058 (ADVERTISED_Pause |
2059 ADVERTISED_Asym_Pause)));
2060 mutex_unlock(&dev->link_lock);
2061 }
2062 emac_force_link_update(dev);
2063
2064 return 0;
2065 }
2066
2067 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2068 struct ethtool_ringparam *rp)
2069 {
2070 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2071 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2072 }
2073
2074 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2075 struct ethtool_pauseparam *pp)
2076 {
2077 struct emac_instance *dev = netdev_priv(ndev);
2078
2079 mutex_lock(&dev->link_lock);
2080 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2081 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2082 pp->autoneg = 1;
2083
2084 if (dev->phy.duplex == DUPLEX_FULL) {
2085 if (dev->phy.pause)
2086 pp->rx_pause = pp->tx_pause = 1;
2087 else if (dev->phy.asym_pause)
2088 pp->tx_pause = 1;
2089 }
2090 mutex_unlock(&dev->link_lock);
2091 }
2092
2093 static int emac_get_regs_len(struct emac_instance *dev)
2094 {
2095 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
2096 return sizeof(struct emac_ethtool_regs_subhdr) +
2097 EMAC4_ETHTOOL_REGS_SIZE(dev);
2098 else
2099 return sizeof(struct emac_ethtool_regs_subhdr) +
2100 EMAC_ETHTOOL_REGS_SIZE(dev);
2101 }
2102
2103 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2104 {
2105 struct emac_instance *dev = netdev_priv(ndev);
2106 int size;
2107
2108 size = sizeof(struct emac_ethtool_regs_hdr) +
2109 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2110 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2111 size += zmii_get_regs_len(dev->zmii_dev);
2112 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2113 size += rgmii_get_regs_len(dev->rgmii_dev);
2114 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2115 size += tah_get_regs_len(dev->tah_dev);
2116
2117 return size;
2118 }
2119
2120 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2121 {
2122 struct emac_ethtool_regs_subhdr *hdr = buf;
2123
2124 hdr->index = dev->cell_index;
2125 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2126 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2127 memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev));
2128 return (void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev);
2129 } else {
2130 hdr->version = EMAC_ETHTOOL_REGS_VER;
2131 memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev));
2132 return (void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev);
2133 }
2134 }
2135
2136 static void emac_ethtool_get_regs(struct net_device *ndev,
2137 struct ethtool_regs *regs, void *buf)
2138 {
2139 struct emac_instance *dev = netdev_priv(ndev);
2140 struct emac_ethtool_regs_hdr *hdr = buf;
2141
2142 hdr->components = 0;
2143 buf = hdr + 1;
2144
2145 buf = mal_dump_regs(dev->mal, buf);
2146 buf = emac_dump_regs(dev, buf);
2147 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2148 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2149 buf = zmii_dump_regs(dev->zmii_dev, buf);
2150 }
2151 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2152 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2153 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2154 }
2155 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2156 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2157 buf = tah_dump_regs(dev->tah_dev, buf);
2158 }
2159 }
2160
2161 static int emac_ethtool_nway_reset(struct net_device *ndev)
2162 {
2163 struct emac_instance *dev = netdev_priv(ndev);
2164 int res = 0;
2165
2166 DBG(dev, "nway_reset" NL);
2167
2168 if (dev->phy.address < 0)
2169 return -EOPNOTSUPP;
2170
2171 mutex_lock(&dev->link_lock);
2172 if (!dev->phy.autoneg) {
2173 res = -EINVAL;
2174 goto out;
2175 }
2176
2177 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2178 out:
2179 mutex_unlock(&dev->link_lock);
2180 emac_force_link_update(dev);
2181 return res;
2182 }
2183
2184 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2185 {
2186 if (stringset == ETH_SS_STATS)
2187 return EMAC_ETHTOOL_STATS_COUNT;
2188 else
2189 return -EINVAL;
2190 }
2191
2192 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2193 u8 * buf)
2194 {
2195 if (stringset == ETH_SS_STATS)
2196 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2197 }
2198
2199 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2200 struct ethtool_stats *estats,
2201 u64 * tmp_stats)
2202 {
2203 struct emac_instance *dev = netdev_priv(ndev);
2204
2205 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2206 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2207 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2208 }
2209
2210 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2211 struct ethtool_drvinfo *info)
2212 {
2213 struct emac_instance *dev = netdev_priv(ndev);
2214
2215 strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
2216 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2217 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
2218 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2219 info->regdump_len = emac_ethtool_get_regs_len(ndev);
2220 }
2221
2222 static const struct ethtool_ops emac_ethtool_ops = {
2223 .get_settings = emac_ethtool_get_settings,
2224 .set_settings = emac_ethtool_set_settings,
2225 .get_drvinfo = emac_ethtool_get_drvinfo,
2226
2227 .get_regs_len = emac_ethtool_get_regs_len,
2228 .get_regs = emac_ethtool_get_regs,
2229
2230 .nway_reset = emac_ethtool_nway_reset,
2231
2232 .get_ringparam = emac_ethtool_get_ringparam,
2233 .get_pauseparam = emac_ethtool_get_pauseparam,
2234
2235 .get_strings = emac_ethtool_get_strings,
2236 .get_sset_count = emac_ethtool_get_sset_count,
2237 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2238
2239 .get_link = ethtool_op_get_link,
2240 };
2241
2242 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2243 {
2244 struct emac_instance *dev = netdev_priv(ndev);
2245 struct mii_ioctl_data *data = if_mii(rq);
2246
2247 DBG(dev, "ioctl %08x" NL, cmd);
2248
2249 if (dev->phy.address < 0)
2250 return -EOPNOTSUPP;
2251
2252 switch (cmd) {
2253 case SIOCGMIIPHY:
2254 data->phy_id = dev->phy.address;
2255 /* Fall through */
2256 case SIOCGMIIREG:
2257 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2258 data->reg_num);
2259 return 0;
2260
2261 case SIOCSMIIREG:
2262 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2263 data->val_in);
2264 return 0;
2265 default:
2266 return -EOPNOTSUPP;
2267 }
2268 }
2269
2270 struct emac_depentry {
2271 u32 phandle;
2272 struct device_node *node;
2273 struct platform_device *ofdev;
2274 void *drvdata;
2275 };
2276
2277 #define EMAC_DEP_MAL_IDX 0
2278 #define EMAC_DEP_ZMII_IDX 1
2279 #define EMAC_DEP_RGMII_IDX 2
2280 #define EMAC_DEP_TAH_IDX 3
2281 #define EMAC_DEP_MDIO_IDX 4
2282 #define EMAC_DEP_PREV_IDX 5
2283 #define EMAC_DEP_COUNT 6
2284
2285 static int emac_check_deps(struct emac_instance *dev,
2286 struct emac_depentry *deps)
2287 {
2288 int i, there = 0;
2289 struct device_node *np;
2290
2291 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2292 /* no dependency on that item, allright */
2293 if (deps[i].phandle == 0) {
2294 there++;
2295 continue;
2296 }
2297 /* special case for blist as the dependency might go away */
2298 if (i == EMAC_DEP_PREV_IDX) {
2299 np = *(dev->blist - 1);
2300 if (np == NULL) {
2301 deps[i].phandle = 0;
2302 there++;
2303 continue;
2304 }
2305 if (deps[i].node == NULL)
2306 deps[i].node = of_node_get(np);
2307 }
2308 if (deps[i].node == NULL)
2309 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2310 if (deps[i].node == NULL)
2311 continue;
2312 if (deps[i].ofdev == NULL)
2313 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2314 if (deps[i].ofdev == NULL)
2315 continue;
2316 if (deps[i].drvdata == NULL)
2317 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
2318 if (deps[i].drvdata != NULL)
2319 there++;
2320 }
2321 return there == EMAC_DEP_COUNT;
2322 }
2323
2324 static void emac_put_deps(struct emac_instance *dev)
2325 {
2326 if (dev->mal_dev)
2327 of_dev_put(dev->mal_dev);
2328 if (dev->zmii_dev)
2329 of_dev_put(dev->zmii_dev);
2330 if (dev->rgmii_dev)
2331 of_dev_put(dev->rgmii_dev);
2332 if (dev->mdio_dev)
2333 of_dev_put(dev->mdio_dev);
2334 if (dev->tah_dev)
2335 of_dev_put(dev->tah_dev);
2336 }
2337
2338 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
2339 void *data)
2340 {
2341 /* We are only intereted in device addition */
2342 if (action == BUS_NOTIFY_BOUND_DRIVER)
2343 wake_up_all(&emac_probe_wait);
2344 return 0;
2345 }
2346
2347 static struct notifier_block emac_of_bus_notifier = {
2348 .notifier_call = emac_of_bus_notify
2349 };
2350
2351 static int emac_wait_deps(struct emac_instance *dev)
2352 {
2353 struct emac_depentry deps[EMAC_DEP_COUNT];
2354 int i, err;
2355
2356 memset(&deps, 0, sizeof(deps));
2357
2358 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2359 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2360 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2361 if (dev->tah_ph)
2362 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2363 if (dev->mdio_ph)
2364 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2365 if (dev->blist && dev->blist > emac_boot_list)
2366 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2367 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2368 wait_event_timeout(emac_probe_wait,
2369 emac_check_deps(dev, deps),
2370 EMAC_PROBE_DEP_TIMEOUT);
2371 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2372 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2373 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2374 if (deps[i].node)
2375 of_node_put(deps[i].node);
2376 if (err && deps[i].ofdev)
2377 of_dev_put(deps[i].ofdev);
2378 }
2379 if (err == 0) {
2380 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2381 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2382 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2383 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2384 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2385 }
2386 if (deps[EMAC_DEP_PREV_IDX].ofdev)
2387 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2388 return err;
2389 }
2390
2391 static int emac_read_uint_prop(struct device_node *np, const char *name,
2392 u32 *val, int fatal)
2393 {
2394 int len;
2395 const u32 *prop = of_get_property(np, name, &len);
2396 if (prop == NULL || len < sizeof(u32)) {
2397 if (fatal)
2398 printk(KERN_ERR "%s: missing %s property\n",
2399 np->full_name, name);
2400 return -ENODEV;
2401 }
2402 *val = *prop;
2403 return 0;
2404 }
2405
2406 static int emac_init_phy(struct emac_instance *dev)
2407 {
2408 struct device_node *np = dev->ofdev->dev.of_node;
2409 struct net_device *ndev = dev->ndev;
2410 u32 phy_map, adv;
2411 int i;
2412
2413 dev->phy.dev = ndev;
2414 dev->phy.mode = dev->phy_mode;
2415
2416 /* PHY-less configuration.
2417 * XXX I probably should move these settings to the dev tree
2418 */
2419 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2420 emac_reset(dev);
2421
2422 /* PHY-less configuration.
2423 * XXX I probably should move these settings to the dev tree
2424 */
2425 dev->phy.address = -1;
2426 dev->phy.features = SUPPORTED_MII;
2427 if (emac_phy_supports_gige(dev->phy_mode))
2428 dev->phy.features |= SUPPORTED_1000baseT_Full;
2429 else
2430 dev->phy.features |= SUPPORTED_100baseT_Full;
2431 dev->phy.pause = 1;
2432
2433 return 0;
2434 }
2435
2436 mutex_lock(&emac_phy_map_lock);
2437 phy_map = dev->phy_map | busy_phy_map;
2438
2439 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2440
2441 dev->phy.mdio_read = emac_mdio_read;
2442 dev->phy.mdio_write = emac_mdio_write;
2443
2444 /* Enable internal clock source */
2445 #ifdef CONFIG_PPC_DCR_NATIVE
2446 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2447 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2448 #endif
2449 /* PHY clock workaround */
2450 emac_rx_clk_tx(dev);
2451
2452 /* Enable internal clock source on 440GX*/
2453 #ifdef CONFIG_PPC_DCR_NATIVE
2454 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2455 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2456 #endif
2457 /* Configure EMAC with defaults so we can at least use MDIO
2458 * This is needed mostly for 440GX
2459 */
2460 if (emac_phy_gpcs(dev->phy.mode)) {
2461 /* XXX
2462 * Make GPCS PHY address equal to EMAC index.
2463 * We probably should take into account busy_phy_map
2464 * and/or phy_map here.
2465 *
2466 * Note that the busy_phy_map is currently global
2467 * while it should probably be per-ASIC...
2468 */
2469 dev->phy.gpcs_address = dev->gpcs_address;
2470 if (dev->phy.gpcs_address == 0xffffffff)
2471 dev->phy.address = dev->cell_index;
2472 }
2473
2474 emac_configure(dev);
2475
2476 if (dev->phy_address != 0xffffffff)
2477 phy_map = ~(1 << dev->phy_address);
2478
2479 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2480 if (!(phy_map & 1)) {
2481 int r;
2482 busy_phy_map |= 1 << i;
2483
2484 /* Quick check if there is a PHY at the address */
2485 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2486 if (r == 0xffff || r < 0)
2487 continue;
2488 if (!emac_mii_phy_probe(&dev->phy, i))
2489 break;
2490 }
2491
2492 /* Enable external clock source */
2493 #ifdef CONFIG_PPC_DCR_NATIVE
2494 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2495 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2496 #endif
2497 mutex_unlock(&emac_phy_map_lock);
2498 if (i == 0x20) {
2499 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2500 return -ENXIO;
2501 }
2502
2503 /* Init PHY */
2504 if (dev->phy.def->ops->init)
2505 dev->phy.def->ops->init(&dev->phy);
2506
2507 /* Disable any PHY features not supported by the platform */
2508 dev->phy.def->features &= ~dev->phy_feat_exc;
2509 dev->phy.features &= ~dev->phy_feat_exc;
2510
2511 /* Setup initial link parameters */
2512 if (dev->phy.features & SUPPORTED_Autoneg) {
2513 adv = dev->phy.features;
2514 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2515 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2516 /* Restart autonegotiation */
2517 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2518 } else {
2519 u32 f = dev->phy.def->features;
2520 int speed = SPEED_10, fd = DUPLEX_HALF;
2521
2522 /* Select highest supported speed/duplex */
2523 if (f & SUPPORTED_1000baseT_Full) {
2524 speed = SPEED_1000;
2525 fd = DUPLEX_FULL;
2526 } else if (f & SUPPORTED_1000baseT_Half)
2527 speed = SPEED_1000;
2528 else if (f & SUPPORTED_100baseT_Full) {
2529 speed = SPEED_100;
2530 fd = DUPLEX_FULL;
2531 } else if (f & SUPPORTED_100baseT_Half)
2532 speed = SPEED_100;
2533 else if (f & SUPPORTED_10baseT_Full)
2534 fd = DUPLEX_FULL;
2535
2536 /* Force link parameters */
2537 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2538 }
2539 return 0;
2540 }
2541
2542 static int emac_init_config(struct emac_instance *dev)
2543 {
2544 struct device_node *np = dev->ofdev->dev.of_node;
2545 const void *p;
2546
2547 /* Read config from device-tree */
2548 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2549 return -ENXIO;
2550 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2551 return -ENXIO;
2552 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2553 return -ENXIO;
2554 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2555 return -ENXIO;
2556 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2557 dev->max_mtu = 1500;
2558 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2559 dev->rx_fifo_size = 2048;
2560 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2561 dev->tx_fifo_size = 2048;
2562 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2563 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2564 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2565 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2566 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2567 dev->phy_address = 0xffffffff;
2568 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2569 dev->phy_map = 0xffffffff;
2570 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2571 dev->gpcs_address = 0xffffffff;
2572 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2573 return -ENXIO;
2574 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2575 dev->tah_ph = 0;
2576 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2577 dev->tah_port = 0;
2578 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2579 dev->mdio_ph = 0;
2580 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2581 dev->zmii_ph = 0;
2582 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2583 dev->zmii_port = 0xffffffff;
2584 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2585 dev->rgmii_ph = 0;
2586 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2587 dev->rgmii_port = 0xffffffff;
2588 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2589 dev->fifo_entry_size = 16;
2590 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2591 dev->mal_burst_size = 256;
2592
2593 /* PHY mode needs some decoding */
2594 dev->phy_mode = of_get_phy_mode(np);
2595 if (dev->phy_mode < 0)
2596 dev->phy_mode = PHY_MODE_NA;
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 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2608 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2609 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2610 EMAC_FTR_460EX_PHY_CLK_FIX);
2611 }
2612 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2613 dev->features |= EMAC_FTR_EMAC4;
2614 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2615 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2616 } else {
2617 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2618 of_device_is_compatible(np, "ibm,emac-440gr"))
2619 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2620 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2621 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
2622 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2623 #else
2624 printk(KERN_ERR "%s: Flow control not disabled!\n",
2625 np->full_name);
2626 return -ENXIO;
2627 #endif
2628 }
2629
2630 }
2631
2632 /* Fixup some feature bits based on the device tree */
2633 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2634 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2635 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2636 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2637
2638 /* CAB lacks the appropriate properties */
2639 if (of_device_is_compatible(np, "ibm,emac-axon"))
2640 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2641 EMAC_FTR_STACR_OC_INVERT;
2642
2643 /* Enable TAH/ZMII/RGMII features as found */
2644 if (dev->tah_ph != 0) {
2645 #ifdef CONFIG_IBM_EMAC_TAH
2646 dev->features |= EMAC_FTR_HAS_TAH;
2647 #else
2648 printk(KERN_ERR "%s: TAH support not enabled !\n",
2649 np->full_name);
2650 return -ENXIO;
2651 #endif
2652 }
2653
2654 if (dev->zmii_ph != 0) {
2655 #ifdef CONFIG_IBM_EMAC_ZMII
2656 dev->features |= EMAC_FTR_HAS_ZMII;
2657 #else
2658 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2659 np->full_name);
2660 return -ENXIO;
2661 #endif
2662 }
2663
2664 if (dev->rgmii_ph != 0) {
2665 #ifdef CONFIG_IBM_EMAC_RGMII
2666 dev->features |= EMAC_FTR_HAS_RGMII;
2667 #else
2668 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2669 np->full_name);
2670 return -ENXIO;
2671 #endif
2672 }
2673
2674 /* Read MAC-address */
2675 p = of_get_property(np, "local-mac-address", NULL);
2676 if (p == NULL) {
2677 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2678 np->full_name);
2679 return -ENXIO;
2680 }
2681 memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
2682
2683 /* IAHT and GAHT filter parameterization */
2684 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2685 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2686 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2687 } else {
2688 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2689 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2690 }
2691
2692 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2693 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2694 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2695 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2696 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2697
2698 return 0;
2699 }
2700
2701 static const struct net_device_ops emac_netdev_ops = {
2702 .ndo_open = emac_open,
2703 .ndo_stop = emac_close,
2704 .ndo_get_stats = emac_stats,
2705 .ndo_set_rx_mode = emac_set_multicast_list,
2706 .ndo_do_ioctl = emac_ioctl,
2707 .ndo_tx_timeout = emac_tx_timeout,
2708 .ndo_validate_addr = eth_validate_addr,
2709 .ndo_set_mac_address = eth_mac_addr,
2710 .ndo_start_xmit = emac_start_xmit,
2711 .ndo_change_mtu = eth_change_mtu,
2712 };
2713
2714 static const struct net_device_ops emac_gige_netdev_ops = {
2715 .ndo_open = emac_open,
2716 .ndo_stop = emac_close,
2717 .ndo_get_stats = emac_stats,
2718 .ndo_set_rx_mode = emac_set_multicast_list,
2719 .ndo_do_ioctl = emac_ioctl,
2720 .ndo_tx_timeout = emac_tx_timeout,
2721 .ndo_validate_addr = eth_validate_addr,
2722 .ndo_set_mac_address = eth_mac_addr,
2723 .ndo_start_xmit = emac_start_xmit_sg,
2724 .ndo_change_mtu = emac_change_mtu,
2725 };
2726
2727 static int emac_probe(struct platform_device *ofdev)
2728 {
2729 struct net_device *ndev;
2730 struct emac_instance *dev;
2731 struct device_node *np = ofdev->dev.of_node;
2732 struct device_node **blist = NULL;
2733 int err, i;
2734
2735 /* Skip unused/unwired EMACS. We leave the check for an unused
2736 * property here for now, but new flat device trees should set a
2737 * status property to "disabled" instead.
2738 */
2739 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2740 return -ENODEV;
2741
2742 /* Find ourselves in the bootlist if we are there */
2743 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2744 if (emac_boot_list[i] == np)
2745 blist = &emac_boot_list[i];
2746
2747 /* Allocate our net_device structure */
2748 err = -ENOMEM;
2749 ndev = alloc_etherdev(sizeof(struct emac_instance));
2750 if (!ndev)
2751 goto err_gone;
2752
2753 dev = netdev_priv(ndev);
2754 dev->ndev = ndev;
2755 dev->ofdev = ofdev;
2756 dev->blist = blist;
2757 SET_NETDEV_DEV(ndev, &ofdev->dev);
2758
2759 /* Initialize some embedded data structures */
2760 mutex_init(&dev->mdio_lock);
2761 mutex_init(&dev->link_lock);
2762 spin_lock_init(&dev->lock);
2763 INIT_WORK(&dev->reset_work, emac_reset_work);
2764
2765 /* Init various config data based on device-tree */
2766 err = emac_init_config(dev);
2767 if (err != 0)
2768 goto err_free;
2769
2770 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2771 dev->emac_irq = irq_of_parse_and_map(np, 0);
2772 dev->wol_irq = irq_of_parse_and_map(np, 1);
2773 if (dev->emac_irq == NO_IRQ) {
2774 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2775 goto err_free;
2776 }
2777 ndev->irq = dev->emac_irq;
2778
2779 /* Map EMAC regs */
2780 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2781 printk(KERN_ERR "%s: Can't get registers address\n",
2782 np->full_name);
2783 goto err_irq_unmap;
2784 }
2785 // TODO : request_mem_region
2786 dev->emacp = ioremap(dev->rsrc_regs.start,
2787 resource_size(&dev->rsrc_regs));
2788 if (dev->emacp == NULL) {
2789 printk(KERN_ERR "%s: Can't map device registers!\n",
2790 np->full_name);
2791 err = -ENOMEM;
2792 goto err_irq_unmap;
2793 }
2794
2795 /* Wait for dependent devices */
2796 err = emac_wait_deps(dev);
2797 if (err) {
2798 printk(KERN_ERR
2799 "%s: Timeout waiting for dependent devices\n",
2800 np->full_name);
2801 /* display more info about what's missing ? */
2802 goto err_reg_unmap;
2803 }
2804 dev->mal = platform_get_drvdata(dev->mal_dev);
2805 if (dev->mdio_dev != NULL)
2806 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
2807
2808 /* Register with MAL */
2809 dev->commac.ops = &emac_commac_ops;
2810 dev->commac.dev = dev;
2811 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2812 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2813 err = mal_register_commac(dev->mal, &dev->commac);
2814 if (err) {
2815 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2816 np->full_name, dev->mal_dev->dev.of_node->full_name);
2817 goto err_rel_deps;
2818 }
2819 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2820 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2821
2822 /* Get pointers to BD rings */
2823 dev->tx_desc =
2824 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2825 dev->rx_desc =
2826 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2827
2828 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2829 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2830
2831 /* Clean rings */
2832 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2833 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2834 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2835 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2836
2837 /* Attach to ZMII, if needed */
2838 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2839 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2840 goto err_unreg_commac;
2841
2842 /* Attach to RGMII, if needed */
2843 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2844 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2845 goto err_detach_zmii;
2846
2847 /* Attach to TAH, if needed */
2848 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2849 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2850 goto err_detach_rgmii;
2851
2852 /* Set some link defaults before we can find out real parameters */
2853 dev->phy.speed = SPEED_100;
2854 dev->phy.duplex = DUPLEX_FULL;
2855 dev->phy.autoneg = AUTONEG_DISABLE;
2856 dev->phy.pause = dev->phy.asym_pause = 0;
2857 dev->stop_timeout = STOP_TIMEOUT_100;
2858 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2859
2860 /* Some SoCs like APM821xx does not support Half Duplex mode. */
2861 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
2862 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
2863 SUPPORTED_100baseT_Half |
2864 SUPPORTED_10baseT_Half);
2865 }
2866
2867 /* Find PHY if any */
2868 err = emac_init_phy(dev);
2869 if (err != 0)
2870 goto err_detach_tah;
2871
2872 if (dev->tah_dev) {
2873 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
2874 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
2875 }
2876 ndev->watchdog_timeo = 5 * HZ;
2877 if (emac_phy_supports_gige(dev->phy_mode)) {
2878 ndev->netdev_ops = &emac_gige_netdev_ops;
2879 dev->commac.ops = &emac_commac_sg_ops;
2880 } else
2881 ndev->netdev_ops = &emac_netdev_ops;
2882 SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
2883
2884 netif_carrier_off(ndev);
2885
2886 err = register_netdev(ndev);
2887 if (err) {
2888 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2889 np->full_name, err);
2890 goto err_detach_tah;
2891 }
2892
2893 /* Set our drvdata last as we don't want them visible until we are
2894 * fully initialized
2895 */
2896 wmb();
2897 platform_set_drvdata(ofdev, dev);
2898
2899 /* There's a new kid in town ! Let's tell everybody */
2900 wake_up_all(&emac_probe_wait);
2901
2902
2903 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
2904 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
2905
2906 if (dev->phy_mode == PHY_MODE_SGMII)
2907 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2908
2909 if (dev->phy.address >= 0)
2910 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2911 dev->phy.def->name, dev->phy.address);
2912
2913 emac_dbg_register(dev);
2914
2915 /* Life is good */
2916 return 0;
2917
2918 /* I have a bad feeling about this ... */
2919
2920 err_detach_tah:
2921 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2922 tah_detach(dev->tah_dev, dev->tah_port);
2923 err_detach_rgmii:
2924 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2925 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2926 err_detach_zmii:
2927 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2928 zmii_detach(dev->zmii_dev, dev->zmii_port);
2929 err_unreg_commac:
2930 mal_unregister_commac(dev->mal, &dev->commac);
2931 err_rel_deps:
2932 emac_put_deps(dev);
2933 err_reg_unmap:
2934 iounmap(dev->emacp);
2935 err_irq_unmap:
2936 if (dev->wol_irq != NO_IRQ)
2937 irq_dispose_mapping(dev->wol_irq);
2938 if (dev->emac_irq != NO_IRQ)
2939 irq_dispose_mapping(dev->emac_irq);
2940 err_free:
2941 free_netdev(ndev);
2942 err_gone:
2943 /* if we were on the bootlist, remove us as we won't show up and
2944 * wake up all waiters to notify them in case they were waiting
2945 * on us
2946 */
2947 if (blist) {
2948 *blist = NULL;
2949 wake_up_all(&emac_probe_wait);
2950 }
2951 return err;
2952 }
2953
2954 static int emac_remove(struct platform_device *ofdev)
2955 {
2956 struct emac_instance *dev = platform_get_drvdata(ofdev);
2957
2958 DBG(dev, "remove" NL);
2959
2960 unregister_netdev(dev->ndev);
2961
2962 cancel_work_sync(&dev->reset_work);
2963
2964 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2965 tah_detach(dev->tah_dev, dev->tah_port);
2966 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2967 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2968 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2969 zmii_detach(dev->zmii_dev, dev->zmii_port);
2970
2971 busy_phy_map &= ~(1 << dev->phy.address);
2972 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
2973
2974 mal_unregister_commac(dev->mal, &dev->commac);
2975 emac_put_deps(dev);
2976
2977 emac_dbg_unregister(dev);
2978 iounmap(dev->emacp);
2979
2980 if (dev->wol_irq != NO_IRQ)
2981 irq_dispose_mapping(dev->wol_irq);
2982 if (dev->emac_irq != NO_IRQ)
2983 irq_dispose_mapping(dev->emac_irq);
2984
2985 free_netdev(dev->ndev);
2986
2987 return 0;
2988 }
2989
2990 /* XXX Features in here should be replaced by properties... */
2991 static struct of_device_id emac_match[] =
2992 {
2993 {
2994 .type = "network",
2995 .compatible = "ibm,emac",
2996 },
2997 {
2998 .type = "network",
2999 .compatible = "ibm,emac4",
3000 },
3001 {
3002 .type = "network",
3003 .compatible = "ibm,emac4sync",
3004 },
3005 {},
3006 };
3007 MODULE_DEVICE_TABLE(of, emac_match);
3008
3009 static struct platform_driver emac_driver = {
3010 .driver = {
3011 .name = "emac",
3012 .owner = THIS_MODULE,
3013 .of_match_table = emac_match,
3014 },
3015 .probe = emac_probe,
3016 .remove = emac_remove,
3017 };
3018
3019 static void __init emac_make_bootlist(void)
3020 {
3021 struct device_node *np = NULL;
3022 int j, max, i = 0, k;
3023 int cell_indices[EMAC_BOOT_LIST_SIZE];
3024
3025 /* Collect EMACs */
3026 while((np = of_find_all_nodes(np)) != NULL) {
3027 const u32 *idx;
3028
3029 if (of_match_node(emac_match, np) == NULL)
3030 continue;
3031 if (of_get_property(np, "unused", NULL))
3032 continue;
3033 idx = of_get_property(np, "cell-index", NULL);
3034 if (idx == NULL)
3035 continue;
3036 cell_indices[i] = *idx;
3037 emac_boot_list[i++] = of_node_get(np);
3038 if (i >= EMAC_BOOT_LIST_SIZE) {
3039 of_node_put(np);
3040 break;
3041 }
3042 }
3043 max = i;
3044
3045 /* Bubble sort them (doh, what a creative algorithm :-) */
3046 for (i = 0; max > 1 && (i < (max - 1)); i++)
3047 for (j = i; j < max; j++) {
3048 if (cell_indices[i] > cell_indices[j]) {
3049 np = emac_boot_list[i];
3050 emac_boot_list[i] = emac_boot_list[j];
3051 emac_boot_list[j] = np;
3052 k = cell_indices[i];
3053 cell_indices[i] = cell_indices[j];
3054 cell_indices[j] = k;
3055 }
3056 }
3057 }
3058
3059 static int __init emac_init(void)
3060 {
3061 int rc;
3062
3063 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3064
3065 /* Init debug stuff */
3066 emac_init_debug();
3067
3068 /* Build EMAC boot list */
3069 emac_make_bootlist();
3070
3071 /* Init submodules */
3072 rc = mal_init();
3073 if (rc)
3074 goto err;
3075 rc = zmii_init();
3076 if (rc)
3077 goto err_mal;
3078 rc = rgmii_init();
3079 if (rc)
3080 goto err_zmii;
3081 rc = tah_init();
3082 if (rc)
3083 goto err_rgmii;
3084 rc = platform_driver_register(&emac_driver);
3085 if (rc)
3086 goto err_tah;
3087
3088 return 0;
3089
3090 err_tah:
3091 tah_exit();
3092 err_rgmii:
3093 rgmii_exit();
3094 err_zmii:
3095 zmii_exit();
3096 err_mal:
3097 mal_exit();
3098 err:
3099 return rc;
3100 }
3101
3102 static void __exit emac_exit(void)
3103 {
3104 int i;
3105
3106 platform_driver_unregister(&emac_driver);
3107
3108 tah_exit();
3109 rgmii_exit();
3110 zmii_exit();
3111 mal_exit();
3112 emac_fini_debug();
3113
3114 /* Destroy EMAC boot list */
3115 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3116 if (emac_boot_list[i])
3117 of_node_put(emac_boot_list[i]);
3118 }
3119
3120 module_init(emac_init);
3121 module_exit(emac_exit);
Linus' kernel tree