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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / ibm / emac / core.c
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 /* minimum number of free TX descriptors required to wake up TX process */
83 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
84
85 /* If packet size is less than this number, we allocate small skb and copy packet
86 * contents into it instead of just sending original big skb up
87 */
88 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
89
90 /* Since multiple EMACs share MDIO lines in various ways, we need
91 * to avoid re-using the same PHY ID in cases where the arch didn't
92 * setup precise phy_map entries
93 *
94 * XXX This is something that needs to be reworked as we can have multiple
95 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
96 * probably require in that case to have explicit PHY IDs in the device-tree
97 */
98 static u32 busy_phy_map;
99 static DEFINE_MUTEX(emac_phy_map_lock);
100
101 /* This is the wait queue used to wait on any event related to probe, that
102 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
103 */
104 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
105
106 /* Having stable interface names is a doomed idea. However, it would be nice
107 * if we didn't have completely random interface names at boot too :-) It's
108 * just a matter of making everybody's life easier. Since we are doing
109 * threaded probing, it's a bit harder though. The base idea here is that
110 * we make up a list of all emacs in the device-tree before we register the
111 * driver. Every emac will then wait for the previous one in the list to
112 * initialize before itself. We should also keep that list ordered by
113 * cell_index.
114 * That list is only 4 entries long, meaning that additional EMACs don't
115 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
116 */
117
118 #define EMAC_BOOT_LIST_SIZE 4
119 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
120
121 /* How long should I wait for dependent devices ? */
122 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
123
124 /* I don't want to litter system log with timeout errors
125 * when we have brain-damaged PHY.
126 */
127 static inline void emac_report_timeout_error(struct emac_instance *dev,
128 const char *error)
129 {
130 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
131 EMAC_FTR_460EX_PHY_CLK_FIX |
132 EMAC_FTR_440EP_PHY_CLK_FIX))
133 DBG(dev, "%s" NL, error);
134 else if (net_ratelimit())
135 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
136 error);
137 }
138
139 /* EMAC PHY clock workaround:
140 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
141 * which allows controlling each EMAC clock
142 */
143 static inline void emac_rx_clk_tx(struct emac_instance *dev)
144 {
145 #ifdef CONFIG_PPC_DCR_NATIVE
146 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
147 dcri_clrset(SDR0, SDR0_MFR,
148 0, SDR0_MFR_ECS >> dev->cell_index);
149 #endif
150 }
151
152 static inline void emac_rx_clk_default(struct emac_instance *dev)
153 {
154 #ifdef CONFIG_PPC_DCR_NATIVE
155 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
156 dcri_clrset(SDR0, SDR0_MFR,
157 SDR0_MFR_ECS >> dev->cell_index, 0);
158 #endif
159 }
160
161 /* PHY polling intervals */
162 #define PHY_POLL_LINK_ON HZ
163 #define PHY_POLL_LINK_OFF (HZ / 5)
164
165 /* Graceful stop timeouts in us.
166 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
167 */
168 #define STOP_TIMEOUT_10 1230
169 #define STOP_TIMEOUT_100 124
170 #define STOP_TIMEOUT_1000 13
171 #define STOP_TIMEOUT_1000_JUMBO 73
172
173 static unsigned char default_mcast_addr[] = {
174 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
175 };
176
177 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
178 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
179 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
180 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
181 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
182 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
183 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
184 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
185 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
186 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
187 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
188 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
189 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
190 "tx_bd_excessive_collisions", "tx_bd_late_collision",
191 "tx_bd_multple_collisions", "tx_bd_single_collision",
192 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
193 "tx_errors"
194 };
195
196 static irqreturn_t emac_irq(int irq, void *dev_instance);
197 static void emac_clean_tx_ring(struct emac_instance *dev);
198 static void __emac_set_multicast_list(struct emac_instance *dev);
199
200 static inline int emac_phy_supports_gige(int phy_mode)
201 {
202 return phy_mode == PHY_MODE_GMII ||
203 phy_mode == PHY_MODE_RGMII ||
204 phy_mode == PHY_MODE_SGMII ||
205 phy_mode == PHY_MODE_TBI ||
206 phy_mode == PHY_MODE_RTBI;
207 }
208
209 static inline int emac_phy_gpcs(int phy_mode)
210 {
211 return phy_mode == PHY_MODE_SGMII ||
212 phy_mode == PHY_MODE_TBI ||
213 phy_mode == PHY_MODE_RTBI;
214 }
215
216 static inline void emac_tx_enable(struct emac_instance *dev)
217 {
218 struct emac_regs __iomem *p = dev->emacp;
219 u32 r;
220
221 DBG(dev, "tx_enable" NL);
222
223 r = in_be32(&p->mr0);
224 if (!(r & EMAC_MR0_TXE))
225 out_be32(&p->mr0, r | EMAC_MR0_TXE);
226 }
227
228 static void emac_tx_disable(struct emac_instance *dev)
229 {
230 struct emac_regs __iomem *p = dev->emacp;
231 u32 r;
232
233 DBG(dev, "tx_disable" NL);
234
235 r = in_be32(&p->mr0);
236 if (r & EMAC_MR0_TXE) {
237 int n = dev->stop_timeout;
238 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
239 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
240 udelay(1);
241 --n;
242 }
243 if (unlikely(!n))
244 emac_report_timeout_error(dev, "TX disable timeout");
245 }
246 }
247
248 static void emac_rx_enable(struct emac_instance *dev)
249 {
250 struct emac_regs __iomem *p = dev->emacp;
251 u32 r;
252
253 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
254 goto out;
255
256 DBG(dev, "rx_enable" NL);
257
258 r = in_be32(&p->mr0);
259 if (!(r & EMAC_MR0_RXE)) {
260 if (unlikely(!(r & EMAC_MR0_RXI))) {
261 /* Wait if previous async disable is still in progress */
262 int n = dev->stop_timeout;
263 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
264 udelay(1);
265 --n;
266 }
267 if (unlikely(!n))
268 emac_report_timeout_error(dev,
269 "RX disable timeout");
270 }
271 out_be32(&p->mr0, r | EMAC_MR0_RXE);
272 }
273 out:
274 ;
275 }
276
277 static void emac_rx_disable(struct emac_instance *dev)
278 {
279 struct emac_regs __iomem *p = dev->emacp;
280 u32 r;
281
282 DBG(dev, "rx_disable" NL);
283
284 r = in_be32(&p->mr0);
285 if (r & EMAC_MR0_RXE) {
286 int n = dev->stop_timeout;
287 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
288 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
289 udelay(1);
290 --n;
291 }
292 if (unlikely(!n))
293 emac_report_timeout_error(dev, "RX disable timeout");
294 }
295 }
296
297 static inline void emac_netif_stop(struct emac_instance *dev)
298 {
299 netif_tx_lock_bh(dev->ndev);
300 netif_addr_lock(dev->ndev);
301 dev->no_mcast = 1;
302 netif_addr_unlock(dev->ndev);
303 netif_tx_unlock_bh(dev->ndev);
304 netif_trans_update(dev->ndev); /* prevent tx timeout */
305 mal_poll_disable(dev->mal, &dev->commac);
306 netif_tx_disable(dev->ndev);
307 }
308
309 static inline void emac_netif_start(struct emac_instance *dev)
310 {
311 netif_tx_lock_bh(dev->ndev);
312 netif_addr_lock(dev->ndev);
313 dev->no_mcast = 0;
314 if (dev->mcast_pending && netif_running(dev->ndev))
315 __emac_set_multicast_list(dev);
316 netif_addr_unlock(dev->ndev);
317 netif_tx_unlock_bh(dev->ndev);
318
319 netif_wake_queue(dev->ndev);
320
321 /* NOTE: unconditional netif_wake_queue is only appropriate
322 * so long as all callers are assured to have free tx slots
323 * (taken from tg3... though the case where that is wrong is
324 * not terribly harmful)
325 */
326 mal_poll_enable(dev->mal, &dev->commac);
327 }
328
329 static inline void emac_rx_disable_async(struct emac_instance *dev)
330 {
331 struct emac_regs __iomem *p = dev->emacp;
332 u32 r;
333
334 DBG(dev, "rx_disable_async" NL);
335
336 r = in_be32(&p->mr0);
337 if (r & EMAC_MR0_RXE)
338 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
339 }
340
341 static int emac_reset(struct emac_instance *dev)
342 {
343 struct emac_regs __iomem *p = dev->emacp;
344 int n = 20;
345
346 DBG(dev, "reset" NL);
347
348 if (!dev->reset_failed) {
349 /* 40x erratum suggests stopping RX channel before reset,
350 * we stop TX as well
351 */
352 emac_rx_disable(dev);
353 emac_tx_disable(dev);
354 }
355
356 #ifdef CONFIG_PPC_DCR_NATIVE
357 /*
358 * PPC460EX/GT Embedded Processor Advanced User's Manual
359 * section 28.10.1 Mode Register 0 (EMACx_MR0) states:
360 * Note: The PHY must provide a TX Clk in order to perform a soft reset
361 * of the EMAC. If none is present, select the internal clock
362 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1).
363 * After a soft reset, select the external clock.
364 */
365 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
366 if (dev->phy_address == 0xffffffff &&
367 dev->phy_map == 0xffffffff) {
368 /* No PHY: select internal loop clock before reset */
369 dcri_clrset(SDR0, SDR0_ETH_CFG,
370 0, SDR0_ETH_CFG_ECS << dev->cell_index);
371 } else {
372 /* PHY present: select external clock before reset */
373 dcri_clrset(SDR0, SDR0_ETH_CFG,
374 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
375 }
376 }
377 #endif
378
379 out_be32(&p->mr0, EMAC_MR0_SRST);
380 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
381 --n;
382
383 #ifdef CONFIG_PPC_DCR_NATIVE
384 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
385 if (dev->phy_address == 0xffffffff &&
386 dev->phy_map == 0xffffffff) {
387 /* No PHY: restore external clock source after reset */
388 dcri_clrset(SDR0, SDR0_ETH_CFG,
389 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
390 }
391 }
392 #endif
393
394 if (n) {
395 dev->reset_failed = 0;
396 return 0;
397 } else {
398 emac_report_timeout_error(dev, "reset timeout");
399 dev->reset_failed = 1;
400 return -ETIMEDOUT;
401 }
402 }
403
404 static void emac_hash_mc(struct emac_instance *dev)
405 {
406 const int regs = EMAC_XAHT_REGS(dev);
407 u32 *gaht_base = emac_gaht_base(dev);
408 u32 gaht_temp[regs];
409 struct netdev_hw_addr *ha;
410 int i;
411
412 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
413
414 memset(gaht_temp, 0, sizeof (gaht_temp));
415
416 netdev_for_each_mc_addr(ha, dev->ndev) {
417 int slot, reg, mask;
418 DBG2(dev, "mc %pM" NL, ha->addr);
419
420 slot = EMAC_XAHT_CRC_TO_SLOT(dev,
421 ether_crc(ETH_ALEN, ha->addr));
422 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
423 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
424
425 gaht_temp[reg] |= mask;
426 }
427
428 for (i = 0; i < regs; i++)
429 out_be32(gaht_base + i, gaht_temp[i]);
430 }
431
432 static inline u32 emac_iff2rmr(struct net_device *ndev)
433 {
434 struct emac_instance *dev = netdev_priv(ndev);
435 u32 r;
436
437 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
438
439 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
440 r |= EMAC4_RMR_BASE;
441 else
442 r |= EMAC_RMR_BASE;
443
444 if (ndev->flags & IFF_PROMISC)
445 r |= EMAC_RMR_PME;
446 else if (ndev->flags & IFF_ALLMULTI ||
447 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
448 r |= EMAC_RMR_PMME;
449 else if (!netdev_mc_empty(ndev))
450 r |= EMAC_RMR_MAE;
451
452 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
453 r &= ~EMAC4_RMR_MJS_MASK;
454 r |= EMAC4_RMR_MJS(ndev->mtu);
455 }
456
457 return r;
458 }
459
460 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
461 {
462 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
463
464 DBG2(dev, "__emac_calc_base_mr1" NL);
465
466 switch(tx_size) {
467 case 2048:
468 ret |= EMAC_MR1_TFS_2K;
469 break;
470 default:
471 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
472 dev->ndev->name, tx_size);
473 }
474
475 switch(rx_size) {
476 case 16384:
477 ret |= EMAC_MR1_RFS_16K;
478 break;
479 case 4096:
480 ret |= EMAC_MR1_RFS_4K;
481 break;
482 default:
483 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
484 dev->ndev->name, rx_size);
485 }
486
487 return ret;
488 }
489
490 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
491 {
492 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
493 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
494
495 DBG2(dev, "__emac4_calc_base_mr1" NL);
496
497 switch(tx_size) {
498 case 16384:
499 ret |= EMAC4_MR1_TFS_16K;
500 break;
501 case 4096:
502 ret |= EMAC4_MR1_TFS_4K;
503 break;
504 case 2048:
505 ret |= EMAC4_MR1_TFS_2K;
506 break;
507 default:
508 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
509 dev->ndev->name, tx_size);
510 }
511
512 switch(rx_size) {
513 case 16384:
514 ret |= EMAC4_MR1_RFS_16K;
515 break;
516 case 4096:
517 ret |= EMAC4_MR1_RFS_4K;
518 break;
519 case 2048:
520 ret |= EMAC4_MR1_RFS_2K;
521 break;
522 default:
523 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
524 dev->ndev->name, rx_size);
525 }
526
527 return ret;
528 }
529
530 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
531 {
532 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
533 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
534 __emac_calc_base_mr1(dev, tx_size, rx_size);
535 }
536
537 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
538 {
539 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
540 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
541 else
542 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
543 }
544
545 static inline u32 emac_calc_rwmr(struct emac_instance *dev,
546 unsigned int low, unsigned int high)
547 {
548 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
549 return (low << 22) | ( (high & 0x3ff) << 6);
550 else
551 return (low << 23) | ( (high & 0x1ff) << 7);
552 }
553
554 static int emac_configure(struct emac_instance *dev)
555 {
556 struct emac_regs __iomem *p = dev->emacp;
557 struct net_device *ndev = dev->ndev;
558 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
559 u32 r, mr1 = 0;
560
561 DBG(dev, "configure" NL);
562
563 if (!link) {
564 out_be32(&p->mr1, in_be32(&p->mr1)
565 | EMAC_MR1_FDE | EMAC_MR1_ILE);
566 udelay(100);
567 } else if (emac_reset(dev) < 0)
568 return -ETIMEDOUT;
569
570 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
571 tah_reset(dev->tah_dev);
572
573 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
574 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
575
576 /* Default fifo sizes */
577 tx_size = dev->tx_fifo_size;
578 rx_size = dev->rx_fifo_size;
579
580 /* No link, force loopback */
581 if (!link)
582 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
583
584 /* Check for full duplex */
585 else if (dev->phy.duplex == DUPLEX_FULL)
586 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
587
588 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
589 dev->stop_timeout = STOP_TIMEOUT_10;
590 switch (dev->phy.speed) {
591 case SPEED_1000:
592 if (emac_phy_gpcs(dev->phy.mode)) {
593 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
594 (dev->phy.gpcs_address != 0xffffffff) ?
595 dev->phy.gpcs_address : dev->phy.address);
596
597 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
598 * identify this GPCS PHY later.
599 */
600 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
601 } else
602 mr1 |= EMAC_MR1_MF_1000;
603
604 /* Extended fifo sizes */
605 tx_size = dev->tx_fifo_size_gige;
606 rx_size = dev->rx_fifo_size_gige;
607
608 if (dev->ndev->mtu > ETH_DATA_LEN) {
609 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
610 mr1 |= EMAC4_MR1_JPSM;
611 else
612 mr1 |= EMAC_MR1_JPSM;
613 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
614 } else
615 dev->stop_timeout = STOP_TIMEOUT_1000;
616 break;
617 case SPEED_100:
618 mr1 |= EMAC_MR1_MF_100;
619 dev->stop_timeout = STOP_TIMEOUT_100;
620 break;
621 default: /* make gcc happy */
622 break;
623 }
624
625 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
626 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
627 dev->phy.speed);
628 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
629 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
630
631 /* on 40x erratum forces us to NOT use integrated flow control,
632 * let's hope it works on 44x ;)
633 */
634 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
635 dev->phy.duplex == DUPLEX_FULL) {
636 if (dev->phy.pause)
637 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
638 else if (dev->phy.asym_pause)
639 mr1 |= EMAC_MR1_APP;
640 }
641
642 /* Add base settings & fifo sizes & program MR1 */
643 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
644 out_be32(&p->mr1, mr1);
645
646 /* Set individual MAC address */
647 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
648 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
649 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
650 ndev->dev_addr[5]);
651
652 /* VLAN Tag Protocol ID */
653 out_be32(&p->vtpid, 0x8100);
654
655 /* Receive mode register */
656 r = emac_iff2rmr(ndev);
657 if (r & EMAC_RMR_MAE)
658 emac_hash_mc(dev);
659 out_be32(&p->rmr, r);
660
661 /* FIFOs thresholds */
662 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
663 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
664 tx_size / 2 / dev->fifo_entry_size);
665 else
666 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
667 tx_size / 2 / dev->fifo_entry_size);
668 out_be32(&p->tmr1, r);
669 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
670
671 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
672 there should be still enough space in FIFO to allow the our link
673 partner time to process this frame and also time to send PAUSE
674 frame itself.
675
676 Here is the worst case scenario for the RX FIFO "headroom"
677 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
678
679 1) One maximum-length frame on TX 1522 bytes
680 2) One PAUSE frame time 64 bytes
681 3) PAUSE frame decode time allowance 64 bytes
682 4) One maximum-length frame on RX 1522 bytes
683 5) Round-trip propagation delay of the link (100Mb) 15 bytes
684 ----------
685 3187 bytes
686
687 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
688 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
689 */
690 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
691 rx_size / 4 / dev->fifo_entry_size);
692 out_be32(&p->rwmr, r);
693
694 /* Set PAUSE timer to the maximum */
695 out_be32(&p->ptr, 0xffff);
696
697 /* IRQ sources */
698 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
699 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
700 EMAC_ISR_IRE | EMAC_ISR_TE;
701 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
702 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
703 EMAC4_ISR_RXOE | */;
704 out_be32(&p->iser, r);
705
706 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
707 if (emac_phy_gpcs(dev->phy.mode)) {
708 if (dev->phy.gpcs_address != 0xffffffff)
709 emac_mii_reset_gpcs(&dev->phy);
710 else
711 emac_mii_reset_phy(&dev->phy);
712 }
713
714 return 0;
715 }
716
717 static void emac_reinitialize(struct emac_instance *dev)
718 {
719 DBG(dev, "reinitialize" NL);
720
721 emac_netif_stop(dev);
722 if (!emac_configure(dev)) {
723 emac_tx_enable(dev);
724 emac_rx_enable(dev);
725 }
726 emac_netif_start(dev);
727 }
728
729 static void emac_full_tx_reset(struct emac_instance *dev)
730 {
731 DBG(dev, "full_tx_reset" NL);
732
733 emac_tx_disable(dev);
734 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
735 emac_clean_tx_ring(dev);
736 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
737
738 emac_configure(dev);
739
740 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
741 emac_tx_enable(dev);
742 emac_rx_enable(dev);
743 }
744
745 static void emac_reset_work(struct work_struct *work)
746 {
747 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
748
749 DBG(dev, "reset_work" NL);
750
751 mutex_lock(&dev->link_lock);
752 if (dev->opened) {
753 emac_netif_stop(dev);
754 emac_full_tx_reset(dev);
755 emac_netif_start(dev);
756 }
757 mutex_unlock(&dev->link_lock);
758 }
759
760 static void emac_tx_timeout(struct net_device *ndev)
761 {
762 struct emac_instance *dev = netdev_priv(ndev);
763
764 DBG(dev, "tx_timeout" NL);
765
766 schedule_work(&dev->reset_work);
767 }
768
769
770 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
771 {
772 int done = !!(stacr & EMAC_STACR_OC);
773
774 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
775 done = !done;
776
777 return done;
778 };
779
780 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
781 {
782 struct emac_regs __iomem *p = dev->emacp;
783 u32 r = 0;
784 int n, err = -ETIMEDOUT;
785
786 mutex_lock(&dev->mdio_lock);
787
788 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
789
790 /* Enable proper MDIO port */
791 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
792 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
793 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
794 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
795
796 /* Wait for management interface to become idle */
797 n = 20;
798 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
799 udelay(1);
800 if (!--n) {
801 DBG2(dev, " -> timeout wait idle\n");
802 goto bail;
803 }
804 }
805
806 /* Issue read command */
807 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
808 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
809 else
810 r = EMAC_STACR_BASE(dev->opb_bus_freq);
811 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
812 r |= EMAC_STACR_OC;
813 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
814 r |= EMACX_STACR_STAC_READ;
815 else
816 r |= EMAC_STACR_STAC_READ;
817 r |= (reg & EMAC_STACR_PRA_MASK)
818 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
819 out_be32(&p->stacr, r);
820
821 /* Wait for read to complete */
822 n = 200;
823 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
824 udelay(1);
825 if (!--n) {
826 DBG2(dev, " -> timeout wait complete\n");
827 goto bail;
828 }
829 }
830
831 if (unlikely(r & EMAC_STACR_PHYE)) {
832 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
833 err = -EREMOTEIO;
834 goto bail;
835 }
836
837 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
838
839 DBG2(dev, "mdio_read -> %04x" NL, r);
840 err = 0;
841 bail:
842 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
843 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
844 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
845 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
846 mutex_unlock(&dev->mdio_lock);
847
848 return err == 0 ? r : err;
849 }
850
851 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
852 u16 val)
853 {
854 struct emac_regs __iomem *p = dev->emacp;
855 u32 r = 0;
856 int n, err = -ETIMEDOUT;
857
858 mutex_lock(&dev->mdio_lock);
859
860 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
861
862 /* Enable proper MDIO port */
863 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
864 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
865 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
866 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
867
868 /* Wait for management interface to be idle */
869 n = 20;
870 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
871 udelay(1);
872 if (!--n) {
873 DBG2(dev, " -> timeout wait idle\n");
874 goto bail;
875 }
876 }
877
878 /* Issue write command */
879 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
880 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
881 else
882 r = EMAC_STACR_BASE(dev->opb_bus_freq);
883 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
884 r |= EMAC_STACR_OC;
885 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
886 r |= EMACX_STACR_STAC_WRITE;
887 else
888 r |= EMAC_STACR_STAC_WRITE;
889 r |= (reg & EMAC_STACR_PRA_MASK) |
890 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
891 (val << EMAC_STACR_PHYD_SHIFT);
892 out_be32(&p->stacr, r);
893
894 /* Wait for write to complete */
895 n = 200;
896 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
897 udelay(1);
898 if (!--n) {
899 DBG2(dev, " -> timeout wait complete\n");
900 goto bail;
901 }
902 }
903 err = 0;
904 bail:
905 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
906 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
907 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
908 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
909 mutex_unlock(&dev->mdio_lock);
910 }
911
912 static int emac_mdio_read(struct net_device *ndev, int id, int reg)
913 {
914 struct emac_instance *dev = netdev_priv(ndev);
915 int res;
916
917 res = __emac_mdio_read((dev->mdio_instance &&
918 dev->phy.gpcs_address != id) ?
919 dev->mdio_instance : dev,
920 (u8) id, (u8) reg);
921 return res;
922 }
923
924 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
925 {
926 struct emac_instance *dev = netdev_priv(ndev);
927
928 __emac_mdio_write((dev->mdio_instance &&
929 dev->phy.gpcs_address != id) ?
930 dev->mdio_instance : dev,
931 (u8) id, (u8) reg, (u16) val);
932 }
933
934 /* Tx lock BH */
935 static void __emac_set_multicast_list(struct emac_instance *dev)
936 {
937 struct emac_regs __iomem *p = dev->emacp;
938 u32 rmr = emac_iff2rmr(dev->ndev);
939
940 DBG(dev, "__multicast %08x" NL, rmr);
941
942 /* I decided to relax register access rules here to avoid
943 * full EMAC reset.
944 *
945 * There is a real problem with EMAC4 core if we use MWSW_001 bit
946 * in MR1 register and do a full EMAC reset.
947 * One TX BD status update is delayed and, after EMAC reset, it
948 * never happens, resulting in TX hung (it'll be recovered by TX
949 * timeout handler eventually, but this is just gross).
950 * So we either have to do full TX reset or try to cheat here :)
951 *
952 * The only required change is to RX mode register, so I *think* all
953 * we need is just to stop RX channel. This seems to work on all
954 * tested SoCs. --ebs
955 *
956 * If we need the full reset, we might just trigger the workqueue
957 * and do it async... a bit nasty but should work --BenH
958 */
959 dev->mcast_pending = 0;
960 emac_rx_disable(dev);
961 if (rmr & EMAC_RMR_MAE)
962 emac_hash_mc(dev);
963 out_be32(&p->rmr, rmr);
964 emac_rx_enable(dev);
965 }
966
967 /* Tx lock BH */
968 static void emac_set_multicast_list(struct net_device *ndev)
969 {
970 struct emac_instance *dev = netdev_priv(ndev);
971
972 DBG(dev, "multicast" NL);
973
974 BUG_ON(!netif_running(dev->ndev));
975
976 if (dev->no_mcast) {
977 dev->mcast_pending = 1;
978 return;
979 }
980
981 mutex_lock(&dev->link_lock);
982 __emac_set_multicast_list(dev);
983 mutex_unlock(&dev->link_lock);
984 }
985
986 static int emac_set_mac_address(struct net_device *ndev, void *sa)
987 {
988 struct emac_instance *dev = netdev_priv(ndev);
989 struct sockaddr *addr = sa;
990 struct emac_regs __iomem *p = dev->emacp;
991
992 if (!is_valid_ether_addr(addr->sa_data))
993 return -EADDRNOTAVAIL;
994
995 mutex_lock(&dev->link_lock);
996
997 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
998
999 emac_rx_disable(dev);
1000 emac_tx_disable(dev);
1001 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
1002 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
1003 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
1004 ndev->dev_addr[5]);
1005 emac_tx_enable(dev);
1006 emac_rx_enable(dev);
1007
1008 mutex_unlock(&dev->link_lock);
1009
1010 return 0;
1011 }
1012
1013 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
1014 {
1015 int rx_sync_size = emac_rx_sync_size(new_mtu);
1016 int rx_skb_size = emac_rx_skb_size(new_mtu);
1017 int i, ret = 0;
1018 int mr1_jumbo_bit_change = 0;
1019
1020 mutex_lock(&dev->link_lock);
1021 emac_netif_stop(dev);
1022 emac_rx_disable(dev);
1023 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1024
1025 if (dev->rx_sg_skb) {
1026 ++dev->estats.rx_dropped_resize;
1027 dev_kfree_skb(dev->rx_sg_skb);
1028 dev->rx_sg_skb = NULL;
1029 }
1030
1031 /* Make a first pass over RX ring and mark BDs ready, dropping
1032 * non-processed packets on the way. We need this as a separate pass
1033 * to simplify error recovery in the case of allocation failure later.
1034 */
1035 for (i = 0; i < NUM_RX_BUFF; ++i) {
1036 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
1037 ++dev->estats.rx_dropped_resize;
1038
1039 dev->rx_desc[i].data_len = 0;
1040 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
1041 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1042 }
1043
1044 /* Reallocate RX ring only if bigger skb buffers are required */
1045 if (rx_skb_size <= dev->rx_skb_size)
1046 goto skip;
1047
1048 /* Second pass, allocate new skbs */
1049 for (i = 0; i < NUM_RX_BUFF; ++i) {
1050 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
1051 if (!skb) {
1052 ret = -ENOMEM;
1053 goto oom;
1054 }
1055
1056 BUG_ON(!dev->rx_skb[i]);
1057 dev_kfree_skb(dev->rx_skb[i]);
1058
1059 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1060 dev->rx_desc[i].data_ptr =
1061 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1062 DMA_FROM_DEVICE) + 2;
1063 dev->rx_skb[i] = skb;
1064 }
1065 skip:
1066 /* Check if we need to change "Jumbo" bit in MR1 */
1067 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
1068 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
1069 (dev->ndev->mtu > ETH_DATA_LEN);
1070 } else {
1071 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
1072 (dev->ndev->mtu > ETH_DATA_LEN);
1073 }
1074
1075 if (mr1_jumbo_bit_change) {
1076 /* This is to prevent starting RX channel in emac_rx_enable() */
1077 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1078
1079 dev->ndev->mtu = new_mtu;
1080 emac_full_tx_reset(dev);
1081 }
1082
1083 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1084 oom:
1085 /* Restart RX */
1086 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1087 dev->rx_slot = 0;
1088 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1089 emac_rx_enable(dev);
1090 emac_netif_start(dev);
1091 mutex_unlock(&dev->link_lock);
1092
1093 return ret;
1094 }
1095
1096 /* Process ctx, rtnl_lock semaphore */
1097 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1098 {
1099 struct emac_instance *dev = netdev_priv(ndev);
1100 int ret = 0;
1101
1102 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1103 return -EINVAL;
1104
1105 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1106
1107 if (netif_running(ndev)) {
1108 /* Check if we really need to reinitialize RX ring */
1109 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1110 ret = emac_resize_rx_ring(dev, new_mtu);
1111 }
1112
1113 if (!ret) {
1114 ndev->mtu = new_mtu;
1115 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1116 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1117 }
1118
1119 return ret;
1120 }
1121
1122 static void emac_clean_tx_ring(struct emac_instance *dev)
1123 {
1124 int i;
1125
1126 for (i = 0; i < NUM_TX_BUFF; ++i) {
1127 if (dev->tx_skb[i]) {
1128 dev_kfree_skb(dev->tx_skb[i]);
1129 dev->tx_skb[i] = NULL;
1130 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1131 ++dev->estats.tx_dropped;
1132 }
1133 dev->tx_desc[i].ctrl = 0;
1134 dev->tx_desc[i].data_ptr = 0;
1135 }
1136 }
1137
1138 static void emac_clean_rx_ring(struct emac_instance *dev)
1139 {
1140 int i;
1141
1142 for (i = 0; i < NUM_RX_BUFF; ++i)
1143 if (dev->rx_skb[i]) {
1144 dev->rx_desc[i].ctrl = 0;
1145 dev_kfree_skb(dev->rx_skb[i]);
1146 dev->rx_skb[i] = NULL;
1147 dev->rx_desc[i].data_ptr = 0;
1148 }
1149
1150 if (dev->rx_sg_skb) {
1151 dev_kfree_skb(dev->rx_sg_skb);
1152 dev->rx_sg_skb = NULL;
1153 }
1154 }
1155
1156 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1157 gfp_t flags)
1158 {
1159 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1160 if (unlikely(!skb))
1161 return -ENOMEM;
1162
1163 dev->rx_skb[slot] = skb;
1164 dev->rx_desc[slot].data_len = 0;
1165
1166 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1167 dev->rx_desc[slot].data_ptr =
1168 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1169 DMA_FROM_DEVICE) + 2;
1170 wmb();
1171 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1172 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1173
1174 return 0;
1175 }
1176
1177 static void emac_print_link_status(struct emac_instance *dev)
1178 {
1179 if (netif_carrier_ok(dev->ndev))
1180 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1181 dev->ndev->name, dev->phy.speed,
1182 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1183 dev->phy.pause ? ", pause enabled" :
1184 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1185 else
1186 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1187 }
1188
1189 /* Process ctx, rtnl_lock semaphore */
1190 static int emac_open(struct net_device *ndev)
1191 {
1192 struct emac_instance *dev = netdev_priv(ndev);
1193 int err, i;
1194
1195 DBG(dev, "open" NL);
1196
1197 /* Setup error IRQ handler */
1198 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1199 if (err) {
1200 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1201 ndev->name, dev->emac_irq);
1202 return err;
1203 }
1204
1205 /* Allocate RX ring */
1206 for (i = 0; i < NUM_RX_BUFF; ++i)
1207 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1208 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1209 ndev->name);
1210 goto oom;
1211 }
1212
1213 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1214 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1215 dev->rx_sg_skb = NULL;
1216
1217 mutex_lock(&dev->link_lock);
1218 dev->opened = 1;
1219
1220 /* Start PHY polling now.
1221 */
1222 if (dev->phy.address >= 0) {
1223 int link_poll_interval;
1224 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1225 dev->phy.def->ops->read_link(&dev->phy);
1226 emac_rx_clk_default(dev);
1227 netif_carrier_on(dev->ndev);
1228 link_poll_interval = PHY_POLL_LINK_ON;
1229 } else {
1230 emac_rx_clk_tx(dev);
1231 netif_carrier_off(dev->ndev);
1232 link_poll_interval = PHY_POLL_LINK_OFF;
1233 }
1234 dev->link_polling = 1;
1235 wmb();
1236 schedule_delayed_work(&dev->link_work, link_poll_interval);
1237 emac_print_link_status(dev);
1238 } else
1239 netif_carrier_on(dev->ndev);
1240
1241 /* Required for Pause packet support in EMAC */
1242 dev_mc_add_global(ndev, default_mcast_addr);
1243
1244 emac_configure(dev);
1245 mal_poll_add(dev->mal, &dev->commac);
1246 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1247 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1248 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1249 emac_tx_enable(dev);
1250 emac_rx_enable(dev);
1251 emac_netif_start(dev);
1252
1253 mutex_unlock(&dev->link_lock);
1254
1255 return 0;
1256 oom:
1257 emac_clean_rx_ring(dev);
1258 free_irq(dev->emac_irq, dev);
1259
1260 return -ENOMEM;
1261 }
1262
1263 /* BHs disabled */
1264 #if 0
1265 static int emac_link_differs(struct emac_instance *dev)
1266 {
1267 u32 r = in_be32(&dev->emacp->mr1);
1268
1269 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1270 int speed, pause, asym_pause;
1271
1272 if (r & EMAC_MR1_MF_1000)
1273 speed = SPEED_1000;
1274 else if (r & EMAC_MR1_MF_100)
1275 speed = SPEED_100;
1276 else
1277 speed = SPEED_10;
1278
1279 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1280 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1281 pause = 1;
1282 asym_pause = 0;
1283 break;
1284 case EMAC_MR1_APP:
1285 pause = 0;
1286 asym_pause = 1;
1287 break;
1288 default:
1289 pause = asym_pause = 0;
1290 }
1291 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1292 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1293 }
1294 #endif
1295
1296 static void emac_link_timer(struct work_struct *work)
1297 {
1298 struct emac_instance *dev =
1299 container_of(to_delayed_work(work),
1300 struct emac_instance, link_work);
1301 int link_poll_interval;
1302
1303 mutex_lock(&dev->link_lock);
1304 DBG2(dev, "link timer" NL);
1305
1306 if (!dev->opened)
1307 goto bail;
1308
1309 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1310 if (!netif_carrier_ok(dev->ndev)) {
1311 emac_rx_clk_default(dev);
1312 /* Get new link parameters */
1313 dev->phy.def->ops->read_link(&dev->phy);
1314
1315 netif_carrier_on(dev->ndev);
1316 emac_netif_stop(dev);
1317 emac_full_tx_reset(dev);
1318 emac_netif_start(dev);
1319 emac_print_link_status(dev);
1320 }
1321 link_poll_interval = PHY_POLL_LINK_ON;
1322 } else {
1323 if (netif_carrier_ok(dev->ndev)) {
1324 emac_rx_clk_tx(dev);
1325 netif_carrier_off(dev->ndev);
1326 netif_tx_disable(dev->ndev);
1327 emac_reinitialize(dev);
1328 emac_print_link_status(dev);
1329 }
1330 link_poll_interval = PHY_POLL_LINK_OFF;
1331 }
1332 schedule_delayed_work(&dev->link_work, link_poll_interval);
1333 bail:
1334 mutex_unlock(&dev->link_lock);
1335 }
1336
1337 static void emac_force_link_update(struct emac_instance *dev)
1338 {
1339 netif_carrier_off(dev->ndev);
1340 smp_rmb();
1341 if (dev->link_polling) {
1342 cancel_delayed_work_sync(&dev->link_work);
1343 if (dev->link_polling)
1344 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1345 }
1346 }
1347
1348 /* Process ctx, rtnl_lock semaphore */
1349 static int emac_close(struct net_device *ndev)
1350 {
1351 struct emac_instance *dev = netdev_priv(ndev);
1352
1353 DBG(dev, "close" NL);
1354
1355 if (dev->phy.address >= 0) {
1356 dev->link_polling = 0;
1357 cancel_delayed_work_sync(&dev->link_work);
1358 }
1359 mutex_lock(&dev->link_lock);
1360 emac_netif_stop(dev);
1361 dev->opened = 0;
1362 mutex_unlock(&dev->link_lock);
1363
1364 emac_rx_disable(dev);
1365 emac_tx_disable(dev);
1366 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1367 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1368 mal_poll_del(dev->mal, &dev->commac);
1369
1370 emac_clean_tx_ring(dev);
1371 emac_clean_rx_ring(dev);
1372
1373 free_irq(dev->emac_irq, dev);
1374
1375 netif_carrier_off(ndev);
1376
1377 return 0;
1378 }
1379
1380 static inline u16 emac_tx_csum(struct emac_instance *dev,
1381 struct sk_buff *skb)
1382 {
1383 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1384 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1385 ++dev->stats.tx_packets_csum;
1386 return EMAC_TX_CTRL_TAH_CSUM;
1387 }
1388 return 0;
1389 }
1390
1391 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1392 {
1393 struct emac_regs __iomem *p = dev->emacp;
1394 struct net_device *ndev = dev->ndev;
1395
1396 /* Send the packet out. If the if makes a significant perf
1397 * difference, then we can store the TMR0 value in "dev"
1398 * instead
1399 */
1400 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1401 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1402 else
1403 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1404
1405 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1406 netif_stop_queue(ndev);
1407 DBG2(dev, "stopped TX queue" NL);
1408 }
1409
1410 netif_trans_update(ndev);
1411 ++dev->stats.tx_packets;
1412 dev->stats.tx_bytes += len;
1413
1414 return NETDEV_TX_OK;
1415 }
1416
1417 /* Tx lock BH */
1418 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1419 {
1420 struct emac_instance *dev = netdev_priv(ndev);
1421 unsigned int len = skb->len;
1422 int slot;
1423
1424 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1425 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1426
1427 slot = dev->tx_slot++;
1428 if (dev->tx_slot == NUM_TX_BUFF) {
1429 dev->tx_slot = 0;
1430 ctrl |= MAL_TX_CTRL_WRAP;
1431 }
1432
1433 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1434
1435 dev->tx_skb[slot] = skb;
1436 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1437 skb->data, len,
1438 DMA_TO_DEVICE);
1439 dev->tx_desc[slot].data_len = (u16) len;
1440 wmb();
1441 dev->tx_desc[slot].ctrl = ctrl;
1442
1443 return emac_xmit_finish(dev, len);
1444 }
1445
1446 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1447 u32 pd, int len, int last, u16 base_ctrl)
1448 {
1449 while (1) {
1450 u16 ctrl = base_ctrl;
1451 int chunk = min(len, MAL_MAX_TX_SIZE);
1452 len -= chunk;
1453
1454 slot = (slot + 1) % NUM_TX_BUFF;
1455
1456 if (last && !len)
1457 ctrl |= MAL_TX_CTRL_LAST;
1458 if (slot == NUM_TX_BUFF - 1)
1459 ctrl |= MAL_TX_CTRL_WRAP;
1460
1461 dev->tx_skb[slot] = NULL;
1462 dev->tx_desc[slot].data_ptr = pd;
1463 dev->tx_desc[slot].data_len = (u16) chunk;
1464 dev->tx_desc[slot].ctrl = ctrl;
1465 ++dev->tx_cnt;
1466
1467 if (!len)
1468 break;
1469
1470 pd += chunk;
1471 }
1472 return slot;
1473 }
1474
1475 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1476 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1477 {
1478 struct emac_instance *dev = netdev_priv(ndev);
1479 int nr_frags = skb_shinfo(skb)->nr_frags;
1480 int len = skb->len, chunk;
1481 int slot, i;
1482 u16 ctrl;
1483 u32 pd;
1484
1485 /* This is common "fast" path */
1486 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1487 return emac_start_xmit(skb, ndev);
1488
1489 len -= skb->data_len;
1490
1491 /* Note, this is only an *estimation*, we can still run out of empty
1492 * slots because of the additional fragmentation into
1493 * MAL_MAX_TX_SIZE-sized chunks
1494 */
1495 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1496 goto stop_queue;
1497
1498 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1499 emac_tx_csum(dev, skb);
1500 slot = dev->tx_slot;
1501
1502 /* skb data */
1503 dev->tx_skb[slot] = NULL;
1504 chunk = min(len, MAL_MAX_TX_SIZE);
1505 dev->tx_desc[slot].data_ptr = pd =
1506 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1507 dev->tx_desc[slot].data_len = (u16) chunk;
1508 len -= chunk;
1509 if (unlikely(len))
1510 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1511 ctrl);
1512 /* skb fragments */
1513 for (i = 0; i < nr_frags; ++i) {
1514 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1515 len = skb_frag_size(frag);
1516
1517 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1518 goto undo_frame;
1519
1520 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1521 DMA_TO_DEVICE);
1522
1523 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1524 ctrl);
1525 }
1526
1527 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1528
1529 /* Attach skb to the last slot so we don't release it too early */
1530 dev->tx_skb[slot] = skb;
1531
1532 /* Send the packet out */
1533 if (dev->tx_slot == NUM_TX_BUFF - 1)
1534 ctrl |= MAL_TX_CTRL_WRAP;
1535 wmb();
1536 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1537 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1538
1539 return emac_xmit_finish(dev, skb->len);
1540
1541 undo_frame:
1542 /* Well, too bad. Our previous estimation was overly optimistic.
1543 * Undo everything.
1544 */
1545 while (slot != dev->tx_slot) {
1546 dev->tx_desc[slot].ctrl = 0;
1547 --dev->tx_cnt;
1548 if (--slot < 0)
1549 slot = NUM_TX_BUFF - 1;
1550 }
1551 ++dev->estats.tx_undo;
1552
1553 stop_queue:
1554 netif_stop_queue(ndev);
1555 DBG2(dev, "stopped TX queue" NL);
1556 return NETDEV_TX_BUSY;
1557 }
1558
1559 /* Tx lock BHs */
1560 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1561 {
1562 struct emac_error_stats *st = &dev->estats;
1563
1564 DBG(dev, "BD TX error %04x" NL, ctrl);
1565
1566 ++st->tx_bd_errors;
1567 if (ctrl & EMAC_TX_ST_BFCS)
1568 ++st->tx_bd_bad_fcs;
1569 if (ctrl & EMAC_TX_ST_LCS)
1570 ++st->tx_bd_carrier_loss;
1571 if (ctrl & EMAC_TX_ST_ED)
1572 ++st->tx_bd_excessive_deferral;
1573 if (ctrl & EMAC_TX_ST_EC)
1574 ++st->tx_bd_excessive_collisions;
1575 if (ctrl & EMAC_TX_ST_LC)
1576 ++st->tx_bd_late_collision;
1577 if (ctrl & EMAC_TX_ST_MC)
1578 ++st->tx_bd_multple_collisions;
1579 if (ctrl & EMAC_TX_ST_SC)
1580 ++st->tx_bd_single_collision;
1581 if (ctrl & EMAC_TX_ST_UR)
1582 ++st->tx_bd_underrun;
1583 if (ctrl & EMAC_TX_ST_SQE)
1584 ++st->tx_bd_sqe;
1585 }
1586
1587 static void emac_poll_tx(void *param)
1588 {
1589 struct emac_instance *dev = param;
1590 u32 bad_mask;
1591
1592 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1593
1594 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1595 bad_mask = EMAC_IS_BAD_TX_TAH;
1596 else
1597 bad_mask = EMAC_IS_BAD_TX;
1598
1599 netif_tx_lock_bh(dev->ndev);
1600 if (dev->tx_cnt) {
1601 u16 ctrl;
1602 int slot = dev->ack_slot, n = 0;
1603 again:
1604 ctrl = dev->tx_desc[slot].ctrl;
1605 if (!(ctrl & MAL_TX_CTRL_READY)) {
1606 struct sk_buff *skb = dev->tx_skb[slot];
1607 ++n;
1608
1609 if (skb) {
1610 dev_kfree_skb(skb);
1611 dev->tx_skb[slot] = NULL;
1612 }
1613 slot = (slot + 1) % NUM_TX_BUFF;
1614
1615 if (unlikely(ctrl & bad_mask))
1616 emac_parse_tx_error(dev, ctrl);
1617
1618 if (--dev->tx_cnt)
1619 goto again;
1620 }
1621 if (n) {
1622 dev->ack_slot = slot;
1623 if (netif_queue_stopped(dev->ndev) &&
1624 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1625 netif_wake_queue(dev->ndev);
1626
1627 DBG2(dev, "tx %d pkts" NL, n);
1628 }
1629 }
1630 netif_tx_unlock_bh(dev->ndev);
1631 }
1632
1633 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1634 int len)
1635 {
1636 struct sk_buff *skb = dev->rx_skb[slot];
1637
1638 DBG2(dev, "recycle %d %d" NL, slot, len);
1639
1640 if (len)
1641 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1642 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1643
1644 dev->rx_desc[slot].data_len = 0;
1645 wmb();
1646 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1647 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1648 }
1649
1650 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1651 {
1652 struct emac_error_stats *st = &dev->estats;
1653
1654 DBG(dev, "BD RX error %04x" NL, ctrl);
1655
1656 ++st->rx_bd_errors;
1657 if (ctrl & EMAC_RX_ST_OE)
1658 ++st->rx_bd_overrun;
1659 if (ctrl & EMAC_RX_ST_BP)
1660 ++st->rx_bd_bad_packet;
1661 if (ctrl & EMAC_RX_ST_RP)
1662 ++st->rx_bd_runt_packet;
1663 if (ctrl & EMAC_RX_ST_SE)
1664 ++st->rx_bd_short_event;
1665 if (ctrl & EMAC_RX_ST_AE)
1666 ++st->rx_bd_alignment_error;
1667 if (ctrl & EMAC_RX_ST_BFCS)
1668 ++st->rx_bd_bad_fcs;
1669 if (ctrl & EMAC_RX_ST_PTL)
1670 ++st->rx_bd_packet_too_long;
1671 if (ctrl & EMAC_RX_ST_ORE)
1672 ++st->rx_bd_out_of_range;
1673 if (ctrl & EMAC_RX_ST_IRE)
1674 ++st->rx_bd_in_range;
1675 }
1676
1677 static inline void emac_rx_csum(struct emac_instance *dev,
1678 struct sk_buff *skb, u16 ctrl)
1679 {
1680 #ifdef CONFIG_IBM_EMAC_TAH
1681 if (!ctrl && dev->tah_dev) {
1682 skb->ip_summed = CHECKSUM_UNNECESSARY;
1683 ++dev->stats.rx_packets_csum;
1684 }
1685 #endif
1686 }
1687
1688 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1689 {
1690 if (likely(dev->rx_sg_skb != NULL)) {
1691 int len = dev->rx_desc[slot].data_len;
1692 int tot_len = dev->rx_sg_skb->len + len;
1693
1694 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1695 ++dev->estats.rx_dropped_mtu;
1696 dev_kfree_skb(dev->rx_sg_skb);
1697 dev->rx_sg_skb = NULL;
1698 } else {
1699 memcpy(skb_tail_pointer(dev->rx_sg_skb),
1700 dev->rx_skb[slot]->data, len);
1701 skb_put(dev->rx_sg_skb, len);
1702 emac_recycle_rx_skb(dev, slot, len);
1703 return 0;
1704 }
1705 }
1706 emac_recycle_rx_skb(dev, slot, 0);
1707 return -1;
1708 }
1709
1710 /* NAPI poll context */
1711 static int emac_poll_rx(void *param, int budget)
1712 {
1713 struct emac_instance *dev = param;
1714 int slot = dev->rx_slot, received = 0;
1715
1716 DBG2(dev, "poll_rx(%d)" NL, budget);
1717
1718 again:
1719 while (budget > 0) {
1720 int len;
1721 struct sk_buff *skb;
1722 u16 ctrl = dev->rx_desc[slot].ctrl;
1723
1724 if (ctrl & MAL_RX_CTRL_EMPTY)
1725 break;
1726
1727 skb = dev->rx_skb[slot];
1728 mb();
1729 len = dev->rx_desc[slot].data_len;
1730
1731 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1732 goto sg;
1733
1734 ctrl &= EMAC_BAD_RX_MASK;
1735 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1736 emac_parse_rx_error(dev, ctrl);
1737 ++dev->estats.rx_dropped_error;
1738 emac_recycle_rx_skb(dev, slot, 0);
1739 len = 0;
1740 goto next;
1741 }
1742
1743 if (len < ETH_HLEN) {
1744 ++dev->estats.rx_dropped_stack;
1745 emac_recycle_rx_skb(dev, slot, len);
1746 goto next;
1747 }
1748
1749 if (len && len < EMAC_RX_COPY_THRESH) {
1750 struct sk_buff *copy_skb =
1751 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1752 if (unlikely(!copy_skb))
1753 goto oom;
1754
1755 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1756 memcpy(copy_skb->data - 2, skb->data - 2, len + 2);
1757 emac_recycle_rx_skb(dev, slot, len);
1758 skb = copy_skb;
1759 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1760 goto oom;
1761
1762 skb_put(skb, len);
1763 push_packet:
1764 skb->protocol = eth_type_trans(skb, dev->ndev);
1765 emac_rx_csum(dev, skb, ctrl);
1766
1767 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1768 ++dev->estats.rx_dropped_stack;
1769 next:
1770 ++dev->stats.rx_packets;
1771 skip:
1772 dev->stats.rx_bytes += len;
1773 slot = (slot + 1) % NUM_RX_BUFF;
1774 --budget;
1775 ++received;
1776 continue;
1777 sg:
1778 if (ctrl & MAL_RX_CTRL_FIRST) {
1779 BUG_ON(dev->rx_sg_skb);
1780 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1781 DBG(dev, "rx OOM %d" NL, slot);
1782 ++dev->estats.rx_dropped_oom;
1783 emac_recycle_rx_skb(dev, slot, 0);
1784 } else {
1785 dev->rx_sg_skb = skb;
1786 skb_put(skb, len);
1787 }
1788 } else if (!emac_rx_sg_append(dev, slot) &&
1789 (ctrl & MAL_RX_CTRL_LAST)) {
1790
1791 skb = dev->rx_sg_skb;
1792 dev->rx_sg_skb = NULL;
1793
1794 ctrl &= EMAC_BAD_RX_MASK;
1795 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1796 emac_parse_rx_error(dev, ctrl);
1797 ++dev->estats.rx_dropped_error;
1798 dev_kfree_skb(skb);
1799 len = 0;
1800 } else
1801 goto push_packet;
1802 }
1803 goto skip;
1804 oom:
1805 DBG(dev, "rx OOM %d" NL, slot);
1806 /* Drop the packet and recycle skb */
1807 ++dev->estats.rx_dropped_oom;
1808 emac_recycle_rx_skb(dev, slot, 0);
1809 goto next;
1810 }
1811
1812 if (received) {
1813 DBG2(dev, "rx %d BDs" NL, received);
1814 dev->rx_slot = slot;
1815 }
1816
1817 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1818 mb();
1819 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1820 DBG2(dev, "rx restart" NL);
1821 received = 0;
1822 goto again;
1823 }
1824
1825 if (dev->rx_sg_skb) {
1826 DBG2(dev, "dropping partial rx packet" NL);
1827 ++dev->estats.rx_dropped_error;
1828 dev_kfree_skb(dev->rx_sg_skb);
1829 dev->rx_sg_skb = NULL;
1830 }
1831
1832 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1833 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1834 emac_rx_enable(dev);
1835 dev->rx_slot = 0;
1836 }
1837 return received;
1838 }
1839
1840 /* NAPI poll context */
1841 static int emac_peek_rx(void *param)
1842 {
1843 struct emac_instance *dev = param;
1844
1845 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1846 }
1847
1848 /* NAPI poll context */
1849 static int emac_peek_rx_sg(void *param)
1850 {
1851 struct emac_instance *dev = param;
1852
1853 int slot = dev->rx_slot;
1854 while (1) {
1855 u16 ctrl = dev->rx_desc[slot].ctrl;
1856 if (ctrl & MAL_RX_CTRL_EMPTY)
1857 return 0;
1858 else if (ctrl & MAL_RX_CTRL_LAST)
1859 return 1;
1860
1861 slot = (slot + 1) % NUM_RX_BUFF;
1862
1863 /* I'm just being paranoid here :) */
1864 if (unlikely(slot == dev->rx_slot))
1865 return 0;
1866 }
1867 }
1868
1869 /* Hard IRQ */
1870 static void emac_rxde(void *param)
1871 {
1872 struct emac_instance *dev = param;
1873
1874 ++dev->estats.rx_stopped;
1875 emac_rx_disable_async(dev);
1876 }
1877
1878 /* Hard IRQ */
1879 static irqreturn_t emac_irq(int irq, void *dev_instance)
1880 {
1881 struct emac_instance *dev = dev_instance;
1882 struct emac_regs __iomem *p = dev->emacp;
1883 struct emac_error_stats *st = &dev->estats;
1884 u32 isr;
1885
1886 spin_lock(&dev->lock);
1887
1888 isr = in_be32(&p->isr);
1889 out_be32(&p->isr, isr);
1890
1891 DBG(dev, "isr = %08x" NL, isr);
1892
1893 if (isr & EMAC4_ISR_TXPE)
1894 ++st->tx_parity;
1895 if (isr & EMAC4_ISR_RXPE)
1896 ++st->rx_parity;
1897 if (isr & EMAC4_ISR_TXUE)
1898 ++st->tx_underrun;
1899 if (isr & EMAC4_ISR_RXOE)
1900 ++st->rx_fifo_overrun;
1901 if (isr & EMAC_ISR_OVR)
1902 ++st->rx_overrun;
1903 if (isr & EMAC_ISR_BP)
1904 ++st->rx_bad_packet;
1905 if (isr & EMAC_ISR_RP)
1906 ++st->rx_runt_packet;
1907 if (isr & EMAC_ISR_SE)
1908 ++st->rx_short_event;
1909 if (isr & EMAC_ISR_ALE)
1910 ++st->rx_alignment_error;
1911 if (isr & EMAC_ISR_BFCS)
1912 ++st->rx_bad_fcs;
1913 if (isr & EMAC_ISR_PTLE)
1914 ++st->rx_packet_too_long;
1915 if (isr & EMAC_ISR_ORE)
1916 ++st->rx_out_of_range;
1917 if (isr & EMAC_ISR_IRE)
1918 ++st->rx_in_range;
1919 if (isr & EMAC_ISR_SQE)
1920 ++st->tx_sqe;
1921 if (isr & EMAC_ISR_TE)
1922 ++st->tx_errors;
1923
1924 spin_unlock(&dev->lock);
1925
1926 return IRQ_HANDLED;
1927 }
1928
1929 static struct net_device_stats *emac_stats(struct net_device *ndev)
1930 {
1931 struct emac_instance *dev = netdev_priv(ndev);
1932 struct emac_stats *st = &dev->stats;
1933 struct emac_error_stats *est = &dev->estats;
1934 struct net_device_stats *nst = &dev->nstats;
1935 unsigned long flags;
1936
1937 DBG2(dev, "stats" NL);
1938
1939 /* Compute "legacy" statistics */
1940 spin_lock_irqsave(&dev->lock, flags);
1941 nst->rx_packets = (unsigned long)st->rx_packets;
1942 nst->rx_bytes = (unsigned long)st->rx_bytes;
1943 nst->tx_packets = (unsigned long)st->tx_packets;
1944 nst->tx_bytes = (unsigned long)st->tx_bytes;
1945 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1946 est->rx_dropped_error +
1947 est->rx_dropped_resize +
1948 est->rx_dropped_mtu);
1949 nst->tx_dropped = (unsigned long)est->tx_dropped;
1950
1951 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1952 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1953 est->rx_fifo_overrun +
1954 est->rx_overrun);
1955 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1956 est->rx_alignment_error);
1957 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1958 est->rx_bad_fcs);
1959 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1960 est->rx_bd_short_event +
1961 est->rx_bd_packet_too_long +
1962 est->rx_bd_out_of_range +
1963 est->rx_bd_in_range +
1964 est->rx_runt_packet +
1965 est->rx_short_event +
1966 est->rx_packet_too_long +
1967 est->rx_out_of_range +
1968 est->rx_in_range);
1969
1970 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1971 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1972 est->tx_underrun);
1973 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1974 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1975 est->tx_bd_excessive_collisions +
1976 est->tx_bd_late_collision +
1977 est->tx_bd_multple_collisions);
1978 spin_unlock_irqrestore(&dev->lock, flags);
1979 return nst;
1980 }
1981
1982 static struct mal_commac_ops emac_commac_ops = {
1983 .poll_tx = &emac_poll_tx,
1984 .poll_rx = &emac_poll_rx,
1985 .peek_rx = &emac_peek_rx,
1986 .rxde = &emac_rxde,
1987 };
1988
1989 static struct mal_commac_ops emac_commac_sg_ops = {
1990 .poll_tx = &emac_poll_tx,
1991 .poll_rx = &emac_poll_rx,
1992 .peek_rx = &emac_peek_rx_sg,
1993 .rxde = &emac_rxde,
1994 };
1995
1996 /* Ethtool support */
1997 static int emac_ethtool_get_settings(struct net_device *ndev,
1998 struct ethtool_cmd *cmd)
1999 {
2000 struct emac_instance *dev = netdev_priv(ndev);
2001
2002 cmd->supported = dev->phy.features;
2003 cmd->port = PORT_MII;
2004 cmd->phy_address = dev->phy.address;
2005 cmd->transceiver =
2006 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
2007
2008 mutex_lock(&dev->link_lock);
2009 cmd->advertising = dev->phy.advertising;
2010 cmd->autoneg = dev->phy.autoneg;
2011 cmd->speed = dev->phy.speed;
2012 cmd->duplex = dev->phy.duplex;
2013 mutex_unlock(&dev->link_lock);
2014
2015 return 0;
2016 }
2017
2018 static int emac_ethtool_set_settings(struct net_device *ndev,
2019 struct ethtool_cmd *cmd)
2020 {
2021 struct emac_instance *dev = netdev_priv(ndev);
2022 u32 f = dev->phy.features;
2023
2024 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
2025 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
2026
2027 /* Basic sanity checks */
2028 if (dev->phy.address < 0)
2029 return -EOPNOTSUPP;
2030 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
2031 return -EINVAL;
2032 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
2033 return -EINVAL;
2034 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
2035 return -EINVAL;
2036
2037 if (cmd->autoneg == AUTONEG_DISABLE) {
2038 switch (cmd->speed) {
2039 case SPEED_10:
2040 if (cmd->duplex == DUPLEX_HALF &&
2041 !(f & SUPPORTED_10baseT_Half))
2042 return -EINVAL;
2043 if (cmd->duplex == DUPLEX_FULL &&
2044 !(f & SUPPORTED_10baseT_Full))
2045 return -EINVAL;
2046 break;
2047 case SPEED_100:
2048 if (cmd->duplex == DUPLEX_HALF &&
2049 !(f & SUPPORTED_100baseT_Half))
2050 return -EINVAL;
2051 if (cmd->duplex == DUPLEX_FULL &&
2052 !(f & SUPPORTED_100baseT_Full))
2053 return -EINVAL;
2054 break;
2055 case SPEED_1000:
2056 if (cmd->duplex == DUPLEX_HALF &&
2057 !(f & SUPPORTED_1000baseT_Half))
2058 return -EINVAL;
2059 if (cmd->duplex == DUPLEX_FULL &&
2060 !(f & SUPPORTED_1000baseT_Full))
2061 return -EINVAL;
2062 break;
2063 default:
2064 return -EINVAL;
2065 }
2066
2067 mutex_lock(&dev->link_lock);
2068 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2069 cmd->duplex);
2070 mutex_unlock(&dev->link_lock);
2071
2072 } else {
2073 if (!(f & SUPPORTED_Autoneg))
2074 return -EINVAL;
2075
2076 mutex_lock(&dev->link_lock);
2077 dev->phy.def->ops->setup_aneg(&dev->phy,
2078 (cmd->advertising & f) |
2079 (dev->phy.advertising &
2080 (ADVERTISED_Pause |
2081 ADVERTISED_Asym_Pause)));
2082 mutex_unlock(&dev->link_lock);
2083 }
2084 emac_force_link_update(dev);
2085
2086 return 0;
2087 }
2088
2089 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2090 struct ethtool_ringparam *rp)
2091 {
2092 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2093 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2094 }
2095
2096 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2097 struct ethtool_pauseparam *pp)
2098 {
2099 struct emac_instance *dev = netdev_priv(ndev);
2100
2101 mutex_lock(&dev->link_lock);
2102 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2103 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2104 pp->autoneg = 1;
2105
2106 if (dev->phy.duplex == DUPLEX_FULL) {
2107 if (dev->phy.pause)
2108 pp->rx_pause = pp->tx_pause = 1;
2109 else if (dev->phy.asym_pause)
2110 pp->tx_pause = 1;
2111 }
2112 mutex_unlock(&dev->link_lock);
2113 }
2114
2115 static int emac_get_regs_len(struct emac_instance *dev)
2116 {
2117 return sizeof(struct emac_ethtool_regs_subhdr) +
2118 sizeof(struct emac_regs);
2119 }
2120
2121 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2122 {
2123 struct emac_instance *dev = netdev_priv(ndev);
2124 int size;
2125
2126 size = sizeof(struct emac_ethtool_regs_hdr) +
2127 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2128 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2129 size += zmii_get_regs_len(dev->zmii_dev);
2130 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2131 size += rgmii_get_regs_len(dev->rgmii_dev);
2132 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2133 size += tah_get_regs_len(dev->tah_dev);
2134
2135 return size;
2136 }
2137
2138 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2139 {
2140 struct emac_ethtool_regs_subhdr *hdr = buf;
2141
2142 hdr->index = dev->cell_index;
2143 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2144 hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER;
2145 } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2146 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2147 } else {
2148 hdr->version = EMAC_ETHTOOL_REGS_VER;
2149 }
2150 memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs));
2151 return (void *)(hdr + 1) + sizeof(struct emac_regs);
2152 }
2153
2154 static void emac_ethtool_get_regs(struct net_device *ndev,
2155 struct ethtool_regs *regs, void *buf)
2156 {
2157 struct emac_instance *dev = netdev_priv(ndev);
2158 struct emac_ethtool_regs_hdr *hdr = buf;
2159
2160 hdr->components = 0;
2161 buf = hdr + 1;
2162
2163 buf = mal_dump_regs(dev->mal, buf);
2164 buf = emac_dump_regs(dev, buf);
2165 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2166 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2167 buf = zmii_dump_regs(dev->zmii_dev, buf);
2168 }
2169 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2170 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2171 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2172 }
2173 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2174 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2175 buf = tah_dump_regs(dev->tah_dev, buf);
2176 }
2177 }
2178
2179 static int emac_ethtool_nway_reset(struct net_device *ndev)
2180 {
2181 struct emac_instance *dev = netdev_priv(ndev);
2182 int res = 0;
2183
2184 DBG(dev, "nway_reset" NL);
2185
2186 if (dev->phy.address < 0)
2187 return -EOPNOTSUPP;
2188
2189 mutex_lock(&dev->link_lock);
2190 if (!dev->phy.autoneg) {
2191 res = -EINVAL;
2192 goto out;
2193 }
2194
2195 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2196 out:
2197 mutex_unlock(&dev->link_lock);
2198 emac_force_link_update(dev);
2199 return res;
2200 }
2201
2202 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2203 {
2204 if (stringset == ETH_SS_STATS)
2205 return EMAC_ETHTOOL_STATS_COUNT;
2206 else
2207 return -EINVAL;
2208 }
2209
2210 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2211 u8 * buf)
2212 {
2213 if (stringset == ETH_SS_STATS)
2214 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2215 }
2216
2217 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2218 struct ethtool_stats *estats,
2219 u64 * tmp_stats)
2220 {
2221 struct emac_instance *dev = netdev_priv(ndev);
2222
2223 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2224 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2225 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2226 }
2227
2228 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2229 struct ethtool_drvinfo *info)
2230 {
2231 struct emac_instance *dev = netdev_priv(ndev);
2232
2233 strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
2234 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2235 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
2236 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2237 }
2238
2239 static const struct ethtool_ops emac_ethtool_ops = {
2240 .get_settings = emac_ethtool_get_settings,
2241 .set_settings = emac_ethtool_set_settings,
2242 .get_drvinfo = emac_ethtool_get_drvinfo,
2243
2244 .get_regs_len = emac_ethtool_get_regs_len,
2245 .get_regs = emac_ethtool_get_regs,
2246
2247 .nway_reset = emac_ethtool_nway_reset,
2248
2249 .get_ringparam = emac_ethtool_get_ringparam,
2250 .get_pauseparam = emac_ethtool_get_pauseparam,
2251
2252 .get_strings = emac_ethtool_get_strings,
2253 .get_sset_count = emac_ethtool_get_sset_count,
2254 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2255
2256 .get_link = ethtool_op_get_link,
2257 };
2258
2259 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2260 {
2261 struct emac_instance *dev = netdev_priv(ndev);
2262 struct mii_ioctl_data *data = if_mii(rq);
2263
2264 DBG(dev, "ioctl %08x" NL, cmd);
2265
2266 if (dev->phy.address < 0)
2267 return -EOPNOTSUPP;
2268
2269 switch (cmd) {
2270 case SIOCGMIIPHY:
2271 data->phy_id = dev->phy.address;
2272 /* Fall through */
2273 case SIOCGMIIREG:
2274 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2275 data->reg_num);
2276 return 0;
2277
2278 case SIOCSMIIREG:
2279 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2280 data->val_in);
2281 return 0;
2282 default:
2283 return -EOPNOTSUPP;
2284 }
2285 }
2286
2287 struct emac_depentry {
2288 u32 phandle;
2289 struct device_node *node;
2290 struct platform_device *ofdev;
2291 void *drvdata;
2292 };
2293
2294 #define EMAC_DEP_MAL_IDX 0
2295 #define EMAC_DEP_ZMII_IDX 1
2296 #define EMAC_DEP_RGMII_IDX 2
2297 #define EMAC_DEP_TAH_IDX 3
2298 #define EMAC_DEP_MDIO_IDX 4
2299 #define EMAC_DEP_PREV_IDX 5
2300 #define EMAC_DEP_COUNT 6
2301
2302 static int emac_check_deps(struct emac_instance *dev,
2303 struct emac_depentry *deps)
2304 {
2305 int i, there = 0;
2306 struct device_node *np;
2307
2308 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2309 /* no dependency on that item, allright */
2310 if (deps[i].phandle == 0) {
2311 there++;
2312 continue;
2313 }
2314 /* special case for blist as the dependency might go away */
2315 if (i == EMAC_DEP_PREV_IDX) {
2316 np = *(dev->blist - 1);
2317 if (np == NULL) {
2318 deps[i].phandle = 0;
2319 there++;
2320 continue;
2321 }
2322 if (deps[i].node == NULL)
2323 deps[i].node = of_node_get(np);
2324 }
2325 if (deps[i].node == NULL)
2326 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2327 if (deps[i].node == NULL)
2328 continue;
2329 if (deps[i].ofdev == NULL)
2330 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2331 if (deps[i].ofdev == NULL)
2332 continue;
2333 if (deps[i].drvdata == NULL)
2334 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
2335 if (deps[i].drvdata != NULL)
2336 there++;
2337 }
2338 return there == EMAC_DEP_COUNT;
2339 }
2340
2341 static void emac_put_deps(struct emac_instance *dev)
2342 {
2343 of_dev_put(dev->mal_dev);
2344 of_dev_put(dev->zmii_dev);
2345 of_dev_put(dev->rgmii_dev);
2346 of_dev_put(dev->mdio_dev);
2347 of_dev_put(dev->tah_dev);
2348 }
2349
2350 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
2351 void *data)
2352 {
2353 /* We are only intereted in device addition */
2354 if (action == BUS_NOTIFY_BOUND_DRIVER)
2355 wake_up_all(&emac_probe_wait);
2356 return 0;
2357 }
2358
2359 static struct notifier_block emac_of_bus_notifier = {
2360 .notifier_call = emac_of_bus_notify
2361 };
2362
2363 static int emac_wait_deps(struct emac_instance *dev)
2364 {
2365 struct emac_depentry deps[EMAC_DEP_COUNT];
2366 int i, err;
2367
2368 memset(&deps, 0, sizeof(deps));
2369
2370 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2371 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2372 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2373 if (dev->tah_ph)
2374 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2375 if (dev->mdio_ph)
2376 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2377 if (dev->blist && dev->blist > emac_boot_list)
2378 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2379 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2380 wait_event_timeout(emac_probe_wait,
2381 emac_check_deps(dev, deps),
2382 EMAC_PROBE_DEP_TIMEOUT);
2383 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2384 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2385 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2386 of_node_put(deps[i].node);
2387 if (err)
2388 of_dev_put(deps[i].ofdev);
2389 }
2390 if (err == 0) {
2391 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2392 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2393 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2394 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2395 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2396 }
2397 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2398 return err;
2399 }
2400
2401 static int emac_read_uint_prop(struct device_node *np, const char *name,
2402 u32 *val, int fatal)
2403 {
2404 int len;
2405 const u32 *prop = of_get_property(np, name, &len);
2406 if (prop == NULL || len < sizeof(u32)) {
2407 if (fatal)
2408 printk(KERN_ERR "%s: missing %s property\n",
2409 np->full_name, name);
2410 return -ENODEV;
2411 }
2412 *val = *prop;
2413 return 0;
2414 }
2415
2416 static int emac_init_phy(struct emac_instance *dev)
2417 {
2418 struct device_node *np = dev->ofdev->dev.of_node;
2419 struct net_device *ndev = dev->ndev;
2420 u32 phy_map, adv;
2421 int i;
2422
2423 dev->phy.dev = ndev;
2424 dev->phy.mode = dev->phy_mode;
2425
2426 /* PHY-less configuration.
2427 * XXX I probably should move these settings to the dev tree
2428 */
2429 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2430 emac_reset(dev);
2431
2432 /* PHY-less configuration.
2433 * XXX I probably should move these settings to the dev tree
2434 */
2435 dev->phy.address = -1;
2436 dev->phy.features = SUPPORTED_MII;
2437 if (emac_phy_supports_gige(dev->phy_mode))
2438 dev->phy.features |= SUPPORTED_1000baseT_Full;
2439 else
2440 dev->phy.features |= SUPPORTED_100baseT_Full;
2441 dev->phy.pause = 1;
2442
2443 return 0;
2444 }
2445
2446 mutex_lock(&emac_phy_map_lock);
2447 phy_map = dev->phy_map | busy_phy_map;
2448
2449 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2450
2451 dev->phy.mdio_read = emac_mdio_read;
2452 dev->phy.mdio_write = emac_mdio_write;
2453
2454 /* Enable internal clock source */
2455 #ifdef CONFIG_PPC_DCR_NATIVE
2456 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2457 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2458 #endif
2459 /* PHY clock workaround */
2460 emac_rx_clk_tx(dev);
2461
2462 /* Enable internal clock source on 440GX*/
2463 #ifdef CONFIG_PPC_DCR_NATIVE
2464 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2465 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2466 #endif
2467 /* Configure EMAC with defaults so we can at least use MDIO
2468 * This is needed mostly for 440GX
2469 */
2470 if (emac_phy_gpcs(dev->phy.mode)) {
2471 /* XXX
2472 * Make GPCS PHY address equal to EMAC index.
2473 * We probably should take into account busy_phy_map
2474 * and/or phy_map here.
2475 *
2476 * Note that the busy_phy_map is currently global
2477 * while it should probably be per-ASIC...
2478 */
2479 dev->phy.gpcs_address = dev->gpcs_address;
2480 if (dev->phy.gpcs_address == 0xffffffff)
2481 dev->phy.address = dev->cell_index;
2482 }
2483
2484 emac_configure(dev);
2485
2486 if (dev->phy_address != 0xffffffff)
2487 phy_map = ~(1 << dev->phy_address);
2488
2489 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2490 if (!(phy_map & 1)) {
2491 int r;
2492 busy_phy_map |= 1 << i;
2493
2494 /* Quick check if there is a PHY at the address */
2495 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2496 if (r == 0xffff || r < 0)
2497 continue;
2498 if (!emac_mii_phy_probe(&dev->phy, i))
2499 break;
2500 }
2501
2502 /* Enable external clock source */
2503 #ifdef CONFIG_PPC_DCR_NATIVE
2504 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2505 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2506 #endif
2507 mutex_unlock(&emac_phy_map_lock);
2508 if (i == 0x20) {
2509 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2510 return -ENXIO;
2511 }
2512
2513 /* Init PHY */
2514 if (dev->phy.def->ops->init)
2515 dev->phy.def->ops->init(&dev->phy);
2516
2517 /* Disable any PHY features not supported by the platform */
2518 dev->phy.def->features &= ~dev->phy_feat_exc;
2519 dev->phy.features &= ~dev->phy_feat_exc;
2520
2521 /* Setup initial link parameters */
2522 if (dev->phy.features & SUPPORTED_Autoneg) {
2523 adv = dev->phy.features;
2524 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2525 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2526 /* Restart autonegotiation */
2527 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2528 } else {
2529 u32 f = dev->phy.def->features;
2530 int speed = SPEED_10, fd = DUPLEX_HALF;
2531
2532 /* Select highest supported speed/duplex */
2533 if (f & SUPPORTED_1000baseT_Full) {
2534 speed = SPEED_1000;
2535 fd = DUPLEX_FULL;
2536 } else if (f & SUPPORTED_1000baseT_Half)
2537 speed = SPEED_1000;
2538 else if (f & SUPPORTED_100baseT_Full) {
2539 speed = SPEED_100;
2540 fd = DUPLEX_FULL;
2541 } else if (f & SUPPORTED_100baseT_Half)
2542 speed = SPEED_100;
2543 else if (f & SUPPORTED_10baseT_Full)
2544 fd = DUPLEX_FULL;
2545
2546 /* Force link parameters */
2547 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2548 }
2549 return 0;
2550 }
2551
2552 static int emac_init_config(struct emac_instance *dev)
2553 {
2554 struct device_node *np = dev->ofdev->dev.of_node;
2555 const void *p;
2556
2557 /* Read config from device-tree */
2558 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2559 return -ENXIO;
2560 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2561 return -ENXIO;
2562 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2563 return -ENXIO;
2564 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2565 return -ENXIO;
2566 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2567 dev->max_mtu = 1500;
2568 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2569 dev->rx_fifo_size = 2048;
2570 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2571 dev->tx_fifo_size = 2048;
2572 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2573 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2574 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2575 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2576 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2577 dev->phy_address = 0xffffffff;
2578 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2579 dev->phy_map = 0xffffffff;
2580 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2581 dev->gpcs_address = 0xffffffff;
2582 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2583 return -ENXIO;
2584 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2585 dev->tah_ph = 0;
2586 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2587 dev->tah_port = 0;
2588 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2589 dev->mdio_ph = 0;
2590 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2591 dev->zmii_ph = 0;
2592 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2593 dev->zmii_port = 0xffffffff;
2594 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2595 dev->rgmii_ph = 0;
2596 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2597 dev->rgmii_port = 0xffffffff;
2598 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2599 dev->fifo_entry_size = 16;
2600 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2601 dev->mal_burst_size = 256;
2602
2603 /* PHY mode needs some decoding */
2604 dev->phy_mode = of_get_phy_mode(np);
2605 if (dev->phy_mode < 0)
2606 dev->phy_mode = PHY_MODE_NA;
2607
2608 /* Check EMAC version */
2609 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2610 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2611 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2612 of_device_is_compatible(np, "ibm,emac-460gt"))
2613 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2614 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2615 of_device_is_compatible(np, "ibm,emac-405exr"))
2616 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2617 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2618 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2619 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2620 EMAC_FTR_460EX_PHY_CLK_FIX);
2621 }
2622 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2623 dev->features |= EMAC_FTR_EMAC4;
2624 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2625 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2626 } else {
2627 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2628 of_device_is_compatible(np, "ibm,emac-440gr"))
2629 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2630 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2631 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
2632 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2633 #else
2634 printk(KERN_ERR "%s: Flow control not disabled!\n",
2635 np->full_name);
2636 return -ENXIO;
2637 #endif
2638 }
2639
2640 }
2641
2642 /* Fixup some feature bits based on the device tree */
2643 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2644 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2645 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2646 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2647
2648 /* CAB lacks the appropriate properties */
2649 if (of_device_is_compatible(np, "ibm,emac-axon"))
2650 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2651 EMAC_FTR_STACR_OC_INVERT;
2652
2653 /* Enable TAH/ZMII/RGMII features as found */
2654 if (dev->tah_ph != 0) {
2655 #ifdef CONFIG_IBM_EMAC_TAH
2656 dev->features |= EMAC_FTR_HAS_TAH;
2657 #else
2658 printk(KERN_ERR "%s: TAH support not enabled !\n",
2659 np->full_name);
2660 return -ENXIO;
2661 #endif
2662 }
2663
2664 if (dev->zmii_ph != 0) {
2665 #ifdef CONFIG_IBM_EMAC_ZMII
2666 dev->features |= EMAC_FTR_HAS_ZMII;
2667 #else
2668 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2669 np->full_name);
2670 return -ENXIO;
2671 #endif
2672 }
2673
2674 if (dev->rgmii_ph != 0) {
2675 #ifdef CONFIG_IBM_EMAC_RGMII
2676 dev->features |= EMAC_FTR_HAS_RGMII;
2677 #else
2678 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2679 np->full_name);
2680 return -ENXIO;
2681 #endif
2682 }
2683
2684 /* Read MAC-address */
2685 p = of_get_property(np, "local-mac-address", NULL);
2686 if (p == NULL) {
2687 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2688 np->full_name);
2689 return -ENXIO;
2690 }
2691 memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
2692
2693 /* IAHT and GAHT filter parameterization */
2694 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2695 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2696 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2697 } else {
2698 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2699 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2700 }
2701
2702 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2703 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2704 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2705 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2706 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2707
2708 return 0;
2709 }
2710
2711 static const struct net_device_ops emac_netdev_ops = {
2712 .ndo_open = emac_open,
2713 .ndo_stop = emac_close,
2714 .ndo_get_stats = emac_stats,
2715 .ndo_set_rx_mode = emac_set_multicast_list,
2716 .ndo_do_ioctl = emac_ioctl,
2717 .ndo_tx_timeout = emac_tx_timeout,
2718 .ndo_validate_addr = eth_validate_addr,
2719 .ndo_set_mac_address = emac_set_mac_address,
2720 .ndo_start_xmit = emac_start_xmit,
2721 .ndo_change_mtu = eth_change_mtu,
2722 };
2723
2724 static const struct net_device_ops emac_gige_netdev_ops = {
2725 .ndo_open = emac_open,
2726 .ndo_stop = emac_close,
2727 .ndo_get_stats = emac_stats,
2728 .ndo_set_rx_mode = emac_set_multicast_list,
2729 .ndo_do_ioctl = emac_ioctl,
2730 .ndo_tx_timeout = emac_tx_timeout,
2731 .ndo_validate_addr = eth_validate_addr,
2732 .ndo_set_mac_address = emac_set_mac_address,
2733 .ndo_start_xmit = emac_start_xmit_sg,
2734 .ndo_change_mtu = emac_change_mtu,
2735 };
2736
2737 static int emac_probe(struct platform_device *ofdev)
2738 {
2739 struct net_device *ndev;
2740 struct emac_instance *dev;
2741 struct device_node *np = ofdev->dev.of_node;
2742 struct device_node **blist = NULL;
2743 int err, i;
2744
2745 /* Skip unused/unwired EMACS. We leave the check for an unused
2746 * property here for now, but new flat device trees should set a
2747 * status property to "disabled" instead.
2748 */
2749 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2750 return -ENODEV;
2751
2752 /* Find ourselves in the bootlist if we are there */
2753 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2754 if (emac_boot_list[i] == np)
2755 blist = &emac_boot_list[i];
2756
2757 /* Allocate our net_device structure */
2758 err = -ENOMEM;
2759 ndev = alloc_etherdev(sizeof(struct emac_instance));
2760 if (!ndev)
2761 goto err_gone;
2762
2763 dev = netdev_priv(ndev);
2764 dev->ndev = ndev;
2765 dev->ofdev = ofdev;
2766 dev->blist = blist;
2767 SET_NETDEV_DEV(ndev, &ofdev->dev);
2768
2769 /* Initialize some embedded data structures */
2770 mutex_init(&dev->mdio_lock);
2771 mutex_init(&dev->link_lock);
2772 spin_lock_init(&dev->lock);
2773 INIT_WORK(&dev->reset_work, emac_reset_work);
2774
2775 /* Init various config data based on device-tree */
2776 err = emac_init_config(dev);
2777 if (err != 0)
2778 goto err_free;
2779
2780 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2781 dev->emac_irq = irq_of_parse_and_map(np, 0);
2782 dev->wol_irq = irq_of_parse_and_map(np, 1);
2783 if (dev->emac_irq == NO_IRQ) {
2784 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2785 goto err_free;
2786 }
2787 ndev->irq = dev->emac_irq;
2788
2789 /* Map EMAC regs */
2790 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2791 printk(KERN_ERR "%s: Can't get registers address\n",
2792 np->full_name);
2793 goto err_irq_unmap;
2794 }
2795 // TODO : request_mem_region
2796 dev->emacp = ioremap(dev->rsrc_regs.start,
2797 resource_size(&dev->rsrc_regs));
2798 if (dev->emacp == NULL) {
2799 printk(KERN_ERR "%s: Can't map device registers!\n",
2800 np->full_name);
2801 err = -ENOMEM;
2802 goto err_irq_unmap;
2803 }
2804
2805 /* Wait for dependent devices */
2806 err = emac_wait_deps(dev);
2807 if (err) {
2808 printk(KERN_ERR
2809 "%s: Timeout waiting for dependent devices\n",
2810 np->full_name);
2811 /* display more info about what's missing ? */
2812 goto err_reg_unmap;
2813 }
2814 dev->mal = platform_get_drvdata(dev->mal_dev);
2815 if (dev->mdio_dev != NULL)
2816 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
2817
2818 /* Register with MAL */
2819 dev->commac.ops = &emac_commac_ops;
2820 dev->commac.dev = dev;
2821 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2822 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2823 err = mal_register_commac(dev->mal, &dev->commac);
2824 if (err) {
2825 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2826 np->full_name, dev->mal_dev->dev.of_node->full_name);
2827 goto err_rel_deps;
2828 }
2829 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2830 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2831
2832 /* Get pointers to BD rings */
2833 dev->tx_desc =
2834 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2835 dev->rx_desc =
2836 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2837
2838 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2839 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2840
2841 /* Clean rings */
2842 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2843 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2844 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2845 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2846
2847 /* Attach to ZMII, if needed */
2848 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2849 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2850 goto err_unreg_commac;
2851
2852 /* Attach to RGMII, if needed */
2853 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2854 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2855 goto err_detach_zmii;
2856
2857 /* Attach to TAH, if needed */
2858 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2859 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2860 goto err_detach_rgmii;
2861
2862 /* Set some link defaults before we can find out real parameters */
2863 dev->phy.speed = SPEED_100;
2864 dev->phy.duplex = DUPLEX_FULL;
2865 dev->phy.autoneg = AUTONEG_DISABLE;
2866 dev->phy.pause = dev->phy.asym_pause = 0;
2867 dev->stop_timeout = STOP_TIMEOUT_100;
2868 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2869
2870 /* Some SoCs like APM821xx does not support Half Duplex mode. */
2871 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
2872 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
2873 SUPPORTED_100baseT_Half |
2874 SUPPORTED_10baseT_Half);
2875 }
2876
2877 /* Find PHY if any */
2878 err = emac_init_phy(dev);
2879 if (err != 0)
2880 goto err_detach_tah;
2881
2882 if (dev->tah_dev) {
2883 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
2884 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
2885 }
2886 ndev->watchdog_timeo = 5 * HZ;
2887 if (emac_phy_supports_gige(dev->phy_mode)) {
2888 ndev->netdev_ops = &emac_gige_netdev_ops;
2889 dev->commac.ops = &emac_commac_sg_ops;
2890 } else
2891 ndev->netdev_ops = &emac_netdev_ops;
2892 ndev->ethtool_ops = &emac_ethtool_ops;
2893
2894 netif_carrier_off(ndev);
2895
2896 err = register_netdev(ndev);
2897 if (err) {
2898 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2899 np->full_name, err);
2900 goto err_detach_tah;
2901 }
2902
2903 /* Set our drvdata last as we don't want them visible until we are
2904 * fully initialized
2905 */
2906 wmb();
2907 platform_set_drvdata(ofdev, dev);
2908
2909 /* There's a new kid in town ! Let's tell everybody */
2910 wake_up_all(&emac_probe_wait);
2911
2912
2913 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
2914 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
2915
2916 if (dev->phy_mode == PHY_MODE_SGMII)
2917 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2918
2919 if (dev->phy.address >= 0)
2920 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2921 dev->phy.def->name, dev->phy.address);
2922
2923 emac_dbg_register(dev);
2924
2925 /* Life is good */
2926 return 0;
2927
2928 /* I have a bad feeling about this ... */
2929
2930 err_detach_tah:
2931 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2932 tah_detach(dev->tah_dev, dev->tah_port);
2933 err_detach_rgmii:
2934 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2935 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2936 err_detach_zmii:
2937 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2938 zmii_detach(dev->zmii_dev, dev->zmii_port);
2939 err_unreg_commac:
2940 mal_unregister_commac(dev->mal, &dev->commac);
2941 err_rel_deps:
2942 emac_put_deps(dev);
2943 err_reg_unmap:
2944 iounmap(dev->emacp);
2945 err_irq_unmap:
2946 if (dev->wol_irq != NO_IRQ)
2947 irq_dispose_mapping(dev->wol_irq);
2948 if (dev->emac_irq != NO_IRQ)
2949 irq_dispose_mapping(dev->emac_irq);
2950 err_free:
2951 free_netdev(ndev);
2952 err_gone:
2953 /* if we were on the bootlist, remove us as we won't show up and
2954 * wake up all waiters to notify them in case they were waiting
2955 * on us
2956 */
2957 if (blist) {
2958 *blist = NULL;
2959 wake_up_all(&emac_probe_wait);
2960 }
2961 return err;
2962 }
2963
2964 static int emac_remove(struct platform_device *ofdev)
2965 {
2966 struct emac_instance *dev = platform_get_drvdata(ofdev);
2967
2968 DBG(dev, "remove" NL);
2969
2970 unregister_netdev(dev->ndev);
2971
2972 cancel_work_sync(&dev->reset_work);
2973
2974 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2975 tah_detach(dev->tah_dev, dev->tah_port);
2976 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2977 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2978 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2979 zmii_detach(dev->zmii_dev, dev->zmii_port);
2980
2981 busy_phy_map &= ~(1 << dev->phy.address);
2982 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
2983
2984 mal_unregister_commac(dev->mal, &dev->commac);
2985 emac_put_deps(dev);
2986
2987 emac_dbg_unregister(dev);
2988 iounmap(dev->emacp);
2989
2990 if (dev->wol_irq != NO_IRQ)
2991 irq_dispose_mapping(dev->wol_irq);
2992 if (dev->emac_irq != NO_IRQ)
2993 irq_dispose_mapping(dev->emac_irq);
2994
2995 free_netdev(dev->ndev);
2996
2997 return 0;
2998 }
2999
3000 /* XXX Features in here should be replaced by properties... */
3001 static const struct of_device_id emac_match[] =
3002 {
3003 {
3004 .type = "network",
3005 .compatible = "ibm,emac",
3006 },
3007 {
3008 .type = "network",
3009 .compatible = "ibm,emac4",
3010 },
3011 {
3012 .type = "network",
3013 .compatible = "ibm,emac4sync",
3014 },
3015 {},
3016 };
3017 MODULE_DEVICE_TABLE(of, emac_match);
3018
3019 static struct platform_driver emac_driver = {
3020 .driver = {
3021 .name = "emac",
3022 .of_match_table = emac_match,
3023 },
3024 .probe = emac_probe,
3025 .remove = emac_remove,
3026 };
3027
3028 static void __init emac_make_bootlist(void)
3029 {
3030 struct device_node *np = NULL;
3031 int j, max, i = 0;
3032 int cell_indices[EMAC_BOOT_LIST_SIZE];
3033
3034 /* Collect EMACs */
3035 while((np = of_find_all_nodes(np)) != NULL) {
3036 const u32 *idx;
3037
3038 if (of_match_node(emac_match, np) == NULL)
3039 continue;
3040 if (of_get_property(np, "unused", NULL))
3041 continue;
3042 idx = of_get_property(np, "cell-index", NULL);
3043 if (idx == NULL)
3044 continue;
3045 cell_indices[i] = *idx;
3046 emac_boot_list[i++] = of_node_get(np);
3047 if (i >= EMAC_BOOT_LIST_SIZE) {
3048 of_node_put(np);
3049 break;
3050 }
3051 }
3052 max = i;
3053
3054 /* Bubble sort them (doh, what a creative algorithm :-) */
3055 for (i = 0; max > 1 && (i < (max - 1)); i++)
3056 for (j = i; j < max; j++) {
3057 if (cell_indices[i] > cell_indices[j]) {
3058 swap(emac_boot_list[i], emac_boot_list[j]);
3059 swap(cell_indices[i], cell_indices[j]);
3060 }
3061 }
3062 }
3063
3064 static int __init emac_init(void)
3065 {
3066 int rc;
3067
3068 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3069
3070 /* Init debug stuff */
3071 emac_init_debug();
3072
3073 /* Build EMAC boot list */
3074 emac_make_bootlist();
3075
3076 /* Init submodules */
3077 rc = mal_init();
3078 if (rc)
3079 goto err;
3080 rc = zmii_init();
3081 if (rc)
3082 goto err_mal;
3083 rc = rgmii_init();
3084 if (rc)
3085 goto err_zmii;
3086 rc = tah_init();
3087 if (rc)
3088 goto err_rgmii;
3089 rc = platform_driver_register(&emac_driver);
3090 if (rc)
3091 goto err_tah;
3092
3093 return 0;
3094
3095 err_tah:
3096 tah_exit();
3097 err_rgmii:
3098 rgmii_exit();
3099 err_zmii:
3100 zmii_exit();
3101 err_mal:
3102 mal_exit();
3103 err:
3104 return rc;
3105 }
3106
3107 static void __exit emac_exit(void)
3108 {
3109 int i;
3110
3111 platform_driver_unregister(&emac_driver);
3112
3113 tah_exit();
3114 rgmii_exit();
3115 zmii_exit();
3116 mal_exit();
3117 emac_fini_debug();
3118
3119 /* Destroy EMAC boot list */
3120 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3121 of_node_put(emac_boot_list[i]);
3122 }
3123
3124 module_init(emac_init);
3125 module_exit(emac_exit);
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