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[thirdparty/linux.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 <linux/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 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1103
1104 if (netif_running(ndev)) {
1105 /* Check if we really need to reinitialize RX ring */
1106 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1107 ret = emac_resize_rx_ring(dev, new_mtu);
1108 }
1109
1110 if (!ret) {
1111 ndev->mtu = new_mtu;
1112 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1113 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1114 }
1115
1116 return ret;
1117 }
1118
1119 static void emac_clean_tx_ring(struct emac_instance *dev)
1120 {
1121 int i;
1122
1123 for (i = 0; i < NUM_TX_BUFF; ++i) {
1124 if (dev->tx_skb[i]) {
1125 dev_kfree_skb(dev->tx_skb[i]);
1126 dev->tx_skb[i] = NULL;
1127 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1128 ++dev->estats.tx_dropped;
1129 }
1130 dev->tx_desc[i].ctrl = 0;
1131 dev->tx_desc[i].data_ptr = 0;
1132 }
1133 }
1134
1135 static void emac_clean_rx_ring(struct emac_instance *dev)
1136 {
1137 int i;
1138
1139 for (i = 0; i < NUM_RX_BUFF; ++i)
1140 if (dev->rx_skb[i]) {
1141 dev->rx_desc[i].ctrl = 0;
1142 dev_kfree_skb(dev->rx_skb[i]);
1143 dev->rx_skb[i] = NULL;
1144 dev->rx_desc[i].data_ptr = 0;
1145 }
1146
1147 if (dev->rx_sg_skb) {
1148 dev_kfree_skb(dev->rx_sg_skb);
1149 dev->rx_sg_skb = NULL;
1150 }
1151 }
1152
1153 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1154 gfp_t flags)
1155 {
1156 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1157 if (unlikely(!skb))
1158 return -ENOMEM;
1159
1160 dev->rx_skb[slot] = skb;
1161 dev->rx_desc[slot].data_len = 0;
1162
1163 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1164 dev->rx_desc[slot].data_ptr =
1165 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1166 DMA_FROM_DEVICE) + 2;
1167 wmb();
1168 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1169 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1170
1171 return 0;
1172 }
1173
1174 static void emac_print_link_status(struct emac_instance *dev)
1175 {
1176 if (netif_carrier_ok(dev->ndev))
1177 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1178 dev->ndev->name, dev->phy.speed,
1179 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1180 dev->phy.pause ? ", pause enabled" :
1181 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1182 else
1183 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1184 }
1185
1186 /* Process ctx, rtnl_lock semaphore */
1187 static int emac_open(struct net_device *ndev)
1188 {
1189 struct emac_instance *dev = netdev_priv(ndev);
1190 int err, i;
1191
1192 DBG(dev, "open" NL);
1193
1194 /* Setup error IRQ handler */
1195 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1196 if (err) {
1197 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1198 ndev->name, dev->emac_irq);
1199 return err;
1200 }
1201
1202 /* Allocate RX ring */
1203 for (i = 0; i < NUM_RX_BUFF; ++i)
1204 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1205 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1206 ndev->name);
1207 goto oom;
1208 }
1209
1210 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1211 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1212 dev->rx_sg_skb = NULL;
1213
1214 mutex_lock(&dev->link_lock);
1215 dev->opened = 1;
1216
1217 /* Start PHY polling now.
1218 */
1219 if (dev->phy.address >= 0) {
1220 int link_poll_interval;
1221 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1222 dev->phy.def->ops->read_link(&dev->phy);
1223 emac_rx_clk_default(dev);
1224 netif_carrier_on(dev->ndev);
1225 link_poll_interval = PHY_POLL_LINK_ON;
1226 } else {
1227 emac_rx_clk_tx(dev);
1228 netif_carrier_off(dev->ndev);
1229 link_poll_interval = PHY_POLL_LINK_OFF;
1230 }
1231 dev->link_polling = 1;
1232 wmb();
1233 schedule_delayed_work(&dev->link_work, link_poll_interval);
1234 emac_print_link_status(dev);
1235 } else
1236 netif_carrier_on(dev->ndev);
1237
1238 /* Required for Pause packet support in EMAC */
1239 dev_mc_add_global(ndev, default_mcast_addr);
1240
1241 emac_configure(dev);
1242 mal_poll_add(dev->mal, &dev->commac);
1243 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1244 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1245 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1246 emac_tx_enable(dev);
1247 emac_rx_enable(dev);
1248 emac_netif_start(dev);
1249
1250 mutex_unlock(&dev->link_lock);
1251
1252 return 0;
1253 oom:
1254 emac_clean_rx_ring(dev);
1255 free_irq(dev->emac_irq, dev);
1256
1257 return -ENOMEM;
1258 }
1259
1260 /* BHs disabled */
1261 #if 0
1262 static int emac_link_differs(struct emac_instance *dev)
1263 {
1264 u32 r = in_be32(&dev->emacp->mr1);
1265
1266 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1267 int speed, pause, asym_pause;
1268
1269 if (r & EMAC_MR1_MF_1000)
1270 speed = SPEED_1000;
1271 else if (r & EMAC_MR1_MF_100)
1272 speed = SPEED_100;
1273 else
1274 speed = SPEED_10;
1275
1276 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1277 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1278 pause = 1;
1279 asym_pause = 0;
1280 break;
1281 case EMAC_MR1_APP:
1282 pause = 0;
1283 asym_pause = 1;
1284 break;
1285 default:
1286 pause = asym_pause = 0;
1287 }
1288 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1289 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1290 }
1291 #endif
1292
1293 static void emac_link_timer(struct work_struct *work)
1294 {
1295 struct emac_instance *dev =
1296 container_of(to_delayed_work(work),
1297 struct emac_instance, link_work);
1298 int link_poll_interval;
1299
1300 mutex_lock(&dev->link_lock);
1301 DBG2(dev, "link timer" NL);
1302
1303 if (!dev->opened)
1304 goto bail;
1305
1306 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1307 if (!netif_carrier_ok(dev->ndev)) {
1308 emac_rx_clk_default(dev);
1309 /* Get new link parameters */
1310 dev->phy.def->ops->read_link(&dev->phy);
1311
1312 netif_carrier_on(dev->ndev);
1313 emac_netif_stop(dev);
1314 emac_full_tx_reset(dev);
1315 emac_netif_start(dev);
1316 emac_print_link_status(dev);
1317 }
1318 link_poll_interval = PHY_POLL_LINK_ON;
1319 } else {
1320 if (netif_carrier_ok(dev->ndev)) {
1321 emac_rx_clk_tx(dev);
1322 netif_carrier_off(dev->ndev);
1323 netif_tx_disable(dev->ndev);
1324 emac_reinitialize(dev);
1325 emac_print_link_status(dev);
1326 }
1327 link_poll_interval = PHY_POLL_LINK_OFF;
1328 }
1329 schedule_delayed_work(&dev->link_work, link_poll_interval);
1330 bail:
1331 mutex_unlock(&dev->link_lock);
1332 }
1333
1334 static void emac_force_link_update(struct emac_instance *dev)
1335 {
1336 netif_carrier_off(dev->ndev);
1337 smp_rmb();
1338 if (dev->link_polling) {
1339 cancel_delayed_work_sync(&dev->link_work);
1340 if (dev->link_polling)
1341 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1342 }
1343 }
1344
1345 /* Process ctx, rtnl_lock semaphore */
1346 static int emac_close(struct net_device *ndev)
1347 {
1348 struct emac_instance *dev = netdev_priv(ndev);
1349
1350 DBG(dev, "close" NL);
1351
1352 if (dev->phy.address >= 0) {
1353 dev->link_polling = 0;
1354 cancel_delayed_work_sync(&dev->link_work);
1355 }
1356 mutex_lock(&dev->link_lock);
1357 emac_netif_stop(dev);
1358 dev->opened = 0;
1359 mutex_unlock(&dev->link_lock);
1360
1361 emac_rx_disable(dev);
1362 emac_tx_disable(dev);
1363 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1364 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1365 mal_poll_del(dev->mal, &dev->commac);
1366
1367 emac_clean_tx_ring(dev);
1368 emac_clean_rx_ring(dev);
1369
1370 free_irq(dev->emac_irq, dev);
1371
1372 netif_carrier_off(ndev);
1373
1374 return 0;
1375 }
1376
1377 static inline u16 emac_tx_csum(struct emac_instance *dev,
1378 struct sk_buff *skb)
1379 {
1380 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1381 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1382 ++dev->stats.tx_packets_csum;
1383 return EMAC_TX_CTRL_TAH_CSUM;
1384 }
1385 return 0;
1386 }
1387
1388 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1389 {
1390 struct emac_regs __iomem *p = dev->emacp;
1391 struct net_device *ndev = dev->ndev;
1392
1393 /* Send the packet out. If the if makes a significant perf
1394 * difference, then we can store the TMR0 value in "dev"
1395 * instead
1396 */
1397 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1398 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1399 else
1400 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1401
1402 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1403 netif_stop_queue(ndev);
1404 DBG2(dev, "stopped TX queue" NL);
1405 }
1406
1407 netif_trans_update(ndev);
1408 ++dev->stats.tx_packets;
1409 dev->stats.tx_bytes += len;
1410
1411 return NETDEV_TX_OK;
1412 }
1413
1414 /* Tx lock BH */
1415 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1416 {
1417 struct emac_instance *dev = netdev_priv(ndev);
1418 unsigned int len = skb->len;
1419 int slot;
1420
1421 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1422 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1423
1424 slot = dev->tx_slot++;
1425 if (dev->tx_slot == NUM_TX_BUFF) {
1426 dev->tx_slot = 0;
1427 ctrl |= MAL_TX_CTRL_WRAP;
1428 }
1429
1430 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1431
1432 dev->tx_skb[slot] = skb;
1433 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1434 skb->data, len,
1435 DMA_TO_DEVICE);
1436 dev->tx_desc[slot].data_len = (u16) len;
1437 wmb();
1438 dev->tx_desc[slot].ctrl = ctrl;
1439
1440 return emac_xmit_finish(dev, len);
1441 }
1442
1443 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1444 u32 pd, int len, int last, u16 base_ctrl)
1445 {
1446 while (1) {
1447 u16 ctrl = base_ctrl;
1448 int chunk = min(len, MAL_MAX_TX_SIZE);
1449 len -= chunk;
1450
1451 slot = (slot + 1) % NUM_TX_BUFF;
1452
1453 if (last && !len)
1454 ctrl |= MAL_TX_CTRL_LAST;
1455 if (slot == NUM_TX_BUFF - 1)
1456 ctrl |= MAL_TX_CTRL_WRAP;
1457
1458 dev->tx_skb[slot] = NULL;
1459 dev->tx_desc[slot].data_ptr = pd;
1460 dev->tx_desc[slot].data_len = (u16) chunk;
1461 dev->tx_desc[slot].ctrl = ctrl;
1462 ++dev->tx_cnt;
1463
1464 if (!len)
1465 break;
1466
1467 pd += chunk;
1468 }
1469 return slot;
1470 }
1471
1472 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1473 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1474 {
1475 struct emac_instance *dev = netdev_priv(ndev);
1476 int nr_frags = skb_shinfo(skb)->nr_frags;
1477 int len = skb->len, chunk;
1478 int slot, i;
1479 u16 ctrl;
1480 u32 pd;
1481
1482 /* This is common "fast" path */
1483 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1484 return emac_start_xmit(skb, ndev);
1485
1486 len -= skb->data_len;
1487
1488 /* Note, this is only an *estimation*, we can still run out of empty
1489 * slots because of the additional fragmentation into
1490 * MAL_MAX_TX_SIZE-sized chunks
1491 */
1492 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1493 goto stop_queue;
1494
1495 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1496 emac_tx_csum(dev, skb);
1497 slot = dev->tx_slot;
1498
1499 /* skb data */
1500 dev->tx_skb[slot] = NULL;
1501 chunk = min(len, MAL_MAX_TX_SIZE);
1502 dev->tx_desc[slot].data_ptr = pd =
1503 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1504 dev->tx_desc[slot].data_len = (u16) chunk;
1505 len -= chunk;
1506 if (unlikely(len))
1507 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1508 ctrl);
1509 /* skb fragments */
1510 for (i = 0; i < nr_frags; ++i) {
1511 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1512 len = skb_frag_size(frag);
1513
1514 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1515 goto undo_frame;
1516
1517 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1518 DMA_TO_DEVICE);
1519
1520 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1521 ctrl);
1522 }
1523
1524 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1525
1526 /* Attach skb to the last slot so we don't release it too early */
1527 dev->tx_skb[slot] = skb;
1528
1529 /* Send the packet out */
1530 if (dev->tx_slot == NUM_TX_BUFF - 1)
1531 ctrl |= MAL_TX_CTRL_WRAP;
1532 wmb();
1533 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1534 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1535
1536 return emac_xmit_finish(dev, skb->len);
1537
1538 undo_frame:
1539 /* Well, too bad. Our previous estimation was overly optimistic.
1540 * Undo everything.
1541 */
1542 while (slot != dev->tx_slot) {
1543 dev->tx_desc[slot].ctrl = 0;
1544 --dev->tx_cnt;
1545 if (--slot < 0)
1546 slot = NUM_TX_BUFF - 1;
1547 }
1548 ++dev->estats.tx_undo;
1549
1550 stop_queue:
1551 netif_stop_queue(ndev);
1552 DBG2(dev, "stopped TX queue" NL);
1553 return NETDEV_TX_BUSY;
1554 }
1555
1556 /* Tx lock BHs */
1557 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1558 {
1559 struct emac_error_stats *st = &dev->estats;
1560
1561 DBG(dev, "BD TX error %04x" NL, ctrl);
1562
1563 ++st->tx_bd_errors;
1564 if (ctrl & EMAC_TX_ST_BFCS)
1565 ++st->tx_bd_bad_fcs;
1566 if (ctrl & EMAC_TX_ST_LCS)
1567 ++st->tx_bd_carrier_loss;
1568 if (ctrl & EMAC_TX_ST_ED)
1569 ++st->tx_bd_excessive_deferral;
1570 if (ctrl & EMAC_TX_ST_EC)
1571 ++st->tx_bd_excessive_collisions;
1572 if (ctrl & EMAC_TX_ST_LC)
1573 ++st->tx_bd_late_collision;
1574 if (ctrl & EMAC_TX_ST_MC)
1575 ++st->tx_bd_multple_collisions;
1576 if (ctrl & EMAC_TX_ST_SC)
1577 ++st->tx_bd_single_collision;
1578 if (ctrl & EMAC_TX_ST_UR)
1579 ++st->tx_bd_underrun;
1580 if (ctrl & EMAC_TX_ST_SQE)
1581 ++st->tx_bd_sqe;
1582 }
1583
1584 static void emac_poll_tx(void *param)
1585 {
1586 struct emac_instance *dev = param;
1587 u32 bad_mask;
1588
1589 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1590
1591 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1592 bad_mask = EMAC_IS_BAD_TX_TAH;
1593 else
1594 bad_mask = EMAC_IS_BAD_TX;
1595
1596 netif_tx_lock_bh(dev->ndev);
1597 if (dev->tx_cnt) {
1598 u16 ctrl;
1599 int slot = dev->ack_slot, n = 0;
1600 again:
1601 ctrl = dev->tx_desc[slot].ctrl;
1602 if (!(ctrl & MAL_TX_CTRL_READY)) {
1603 struct sk_buff *skb = dev->tx_skb[slot];
1604 ++n;
1605
1606 if (skb) {
1607 dev_kfree_skb(skb);
1608 dev->tx_skb[slot] = NULL;
1609 }
1610 slot = (slot + 1) % NUM_TX_BUFF;
1611
1612 if (unlikely(ctrl & bad_mask))
1613 emac_parse_tx_error(dev, ctrl);
1614
1615 if (--dev->tx_cnt)
1616 goto again;
1617 }
1618 if (n) {
1619 dev->ack_slot = slot;
1620 if (netif_queue_stopped(dev->ndev) &&
1621 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1622 netif_wake_queue(dev->ndev);
1623
1624 DBG2(dev, "tx %d pkts" NL, n);
1625 }
1626 }
1627 netif_tx_unlock_bh(dev->ndev);
1628 }
1629
1630 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1631 int len)
1632 {
1633 struct sk_buff *skb = dev->rx_skb[slot];
1634
1635 DBG2(dev, "recycle %d %d" NL, slot, len);
1636
1637 if (len)
1638 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1639 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1640
1641 dev->rx_desc[slot].data_len = 0;
1642 wmb();
1643 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1644 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1645 }
1646
1647 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1648 {
1649 struct emac_error_stats *st = &dev->estats;
1650
1651 DBG(dev, "BD RX error %04x" NL, ctrl);
1652
1653 ++st->rx_bd_errors;
1654 if (ctrl & EMAC_RX_ST_OE)
1655 ++st->rx_bd_overrun;
1656 if (ctrl & EMAC_RX_ST_BP)
1657 ++st->rx_bd_bad_packet;
1658 if (ctrl & EMAC_RX_ST_RP)
1659 ++st->rx_bd_runt_packet;
1660 if (ctrl & EMAC_RX_ST_SE)
1661 ++st->rx_bd_short_event;
1662 if (ctrl & EMAC_RX_ST_AE)
1663 ++st->rx_bd_alignment_error;
1664 if (ctrl & EMAC_RX_ST_BFCS)
1665 ++st->rx_bd_bad_fcs;
1666 if (ctrl & EMAC_RX_ST_PTL)
1667 ++st->rx_bd_packet_too_long;
1668 if (ctrl & EMAC_RX_ST_ORE)
1669 ++st->rx_bd_out_of_range;
1670 if (ctrl & EMAC_RX_ST_IRE)
1671 ++st->rx_bd_in_range;
1672 }
1673
1674 static inline void emac_rx_csum(struct emac_instance *dev,
1675 struct sk_buff *skb, u16 ctrl)
1676 {
1677 #ifdef CONFIG_IBM_EMAC_TAH
1678 if (!ctrl && dev->tah_dev) {
1679 skb->ip_summed = CHECKSUM_UNNECESSARY;
1680 ++dev->stats.rx_packets_csum;
1681 }
1682 #endif
1683 }
1684
1685 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1686 {
1687 if (likely(dev->rx_sg_skb != NULL)) {
1688 int len = dev->rx_desc[slot].data_len;
1689 int tot_len = dev->rx_sg_skb->len + len;
1690
1691 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1692 ++dev->estats.rx_dropped_mtu;
1693 dev_kfree_skb(dev->rx_sg_skb);
1694 dev->rx_sg_skb = NULL;
1695 } else {
1696 memcpy(skb_tail_pointer(dev->rx_sg_skb),
1697 dev->rx_skb[slot]->data, len);
1698 skb_put(dev->rx_sg_skb, len);
1699 emac_recycle_rx_skb(dev, slot, len);
1700 return 0;
1701 }
1702 }
1703 emac_recycle_rx_skb(dev, slot, 0);
1704 return -1;
1705 }
1706
1707 /* NAPI poll context */
1708 static int emac_poll_rx(void *param, int budget)
1709 {
1710 struct emac_instance *dev = param;
1711 int slot = dev->rx_slot, received = 0;
1712
1713 DBG2(dev, "poll_rx(%d)" NL, budget);
1714
1715 again:
1716 while (budget > 0) {
1717 int len;
1718 struct sk_buff *skb;
1719 u16 ctrl = dev->rx_desc[slot].ctrl;
1720
1721 if (ctrl & MAL_RX_CTRL_EMPTY)
1722 break;
1723
1724 skb = dev->rx_skb[slot];
1725 mb();
1726 len = dev->rx_desc[slot].data_len;
1727
1728 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1729 goto sg;
1730
1731 ctrl &= EMAC_BAD_RX_MASK;
1732 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1733 emac_parse_rx_error(dev, ctrl);
1734 ++dev->estats.rx_dropped_error;
1735 emac_recycle_rx_skb(dev, slot, 0);
1736 len = 0;
1737 goto next;
1738 }
1739
1740 if (len < ETH_HLEN) {
1741 ++dev->estats.rx_dropped_stack;
1742 emac_recycle_rx_skb(dev, slot, len);
1743 goto next;
1744 }
1745
1746 if (len && len < EMAC_RX_COPY_THRESH) {
1747 struct sk_buff *copy_skb =
1748 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1749 if (unlikely(!copy_skb))
1750 goto oom;
1751
1752 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1753 memcpy(copy_skb->data - 2, skb->data - 2, len + 2);
1754 emac_recycle_rx_skb(dev, slot, len);
1755 skb = copy_skb;
1756 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1757 goto oom;
1758
1759 skb_put(skb, len);
1760 push_packet:
1761 skb->protocol = eth_type_trans(skb, dev->ndev);
1762 emac_rx_csum(dev, skb, ctrl);
1763
1764 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1765 ++dev->estats.rx_dropped_stack;
1766 next:
1767 ++dev->stats.rx_packets;
1768 skip:
1769 dev->stats.rx_bytes += len;
1770 slot = (slot + 1) % NUM_RX_BUFF;
1771 --budget;
1772 ++received;
1773 continue;
1774 sg:
1775 if (ctrl & MAL_RX_CTRL_FIRST) {
1776 BUG_ON(dev->rx_sg_skb);
1777 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1778 DBG(dev, "rx OOM %d" NL, slot);
1779 ++dev->estats.rx_dropped_oom;
1780 emac_recycle_rx_skb(dev, slot, 0);
1781 } else {
1782 dev->rx_sg_skb = skb;
1783 skb_put(skb, len);
1784 }
1785 } else if (!emac_rx_sg_append(dev, slot) &&
1786 (ctrl & MAL_RX_CTRL_LAST)) {
1787
1788 skb = dev->rx_sg_skb;
1789 dev->rx_sg_skb = NULL;
1790
1791 ctrl &= EMAC_BAD_RX_MASK;
1792 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1793 emac_parse_rx_error(dev, ctrl);
1794 ++dev->estats.rx_dropped_error;
1795 dev_kfree_skb(skb);
1796 len = 0;
1797 } else
1798 goto push_packet;
1799 }
1800 goto skip;
1801 oom:
1802 DBG(dev, "rx OOM %d" NL, slot);
1803 /* Drop the packet and recycle skb */
1804 ++dev->estats.rx_dropped_oom;
1805 emac_recycle_rx_skb(dev, slot, 0);
1806 goto next;
1807 }
1808
1809 if (received) {
1810 DBG2(dev, "rx %d BDs" NL, received);
1811 dev->rx_slot = slot;
1812 }
1813
1814 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1815 mb();
1816 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1817 DBG2(dev, "rx restart" NL);
1818 received = 0;
1819 goto again;
1820 }
1821
1822 if (dev->rx_sg_skb) {
1823 DBG2(dev, "dropping partial rx packet" NL);
1824 ++dev->estats.rx_dropped_error;
1825 dev_kfree_skb(dev->rx_sg_skb);
1826 dev->rx_sg_skb = NULL;
1827 }
1828
1829 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1830 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1831 emac_rx_enable(dev);
1832 dev->rx_slot = 0;
1833 }
1834 return received;
1835 }
1836
1837 /* NAPI poll context */
1838 static int emac_peek_rx(void *param)
1839 {
1840 struct emac_instance *dev = param;
1841
1842 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1843 }
1844
1845 /* NAPI poll context */
1846 static int emac_peek_rx_sg(void *param)
1847 {
1848 struct emac_instance *dev = param;
1849
1850 int slot = dev->rx_slot;
1851 while (1) {
1852 u16 ctrl = dev->rx_desc[slot].ctrl;
1853 if (ctrl & MAL_RX_CTRL_EMPTY)
1854 return 0;
1855 else if (ctrl & MAL_RX_CTRL_LAST)
1856 return 1;
1857
1858 slot = (slot + 1) % NUM_RX_BUFF;
1859
1860 /* I'm just being paranoid here :) */
1861 if (unlikely(slot == dev->rx_slot))
1862 return 0;
1863 }
1864 }
1865
1866 /* Hard IRQ */
1867 static void emac_rxde(void *param)
1868 {
1869 struct emac_instance *dev = param;
1870
1871 ++dev->estats.rx_stopped;
1872 emac_rx_disable_async(dev);
1873 }
1874
1875 /* Hard IRQ */
1876 static irqreturn_t emac_irq(int irq, void *dev_instance)
1877 {
1878 struct emac_instance *dev = dev_instance;
1879 struct emac_regs __iomem *p = dev->emacp;
1880 struct emac_error_stats *st = &dev->estats;
1881 u32 isr;
1882
1883 spin_lock(&dev->lock);
1884
1885 isr = in_be32(&p->isr);
1886 out_be32(&p->isr, isr);
1887
1888 DBG(dev, "isr = %08x" NL, isr);
1889
1890 if (isr & EMAC4_ISR_TXPE)
1891 ++st->tx_parity;
1892 if (isr & EMAC4_ISR_RXPE)
1893 ++st->rx_parity;
1894 if (isr & EMAC4_ISR_TXUE)
1895 ++st->tx_underrun;
1896 if (isr & EMAC4_ISR_RXOE)
1897 ++st->rx_fifo_overrun;
1898 if (isr & EMAC_ISR_OVR)
1899 ++st->rx_overrun;
1900 if (isr & EMAC_ISR_BP)
1901 ++st->rx_bad_packet;
1902 if (isr & EMAC_ISR_RP)
1903 ++st->rx_runt_packet;
1904 if (isr & EMAC_ISR_SE)
1905 ++st->rx_short_event;
1906 if (isr & EMAC_ISR_ALE)
1907 ++st->rx_alignment_error;
1908 if (isr & EMAC_ISR_BFCS)
1909 ++st->rx_bad_fcs;
1910 if (isr & EMAC_ISR_PTLE)
1911 ++st->rx_packet_too_long;
1912 if (isr & EMAC_ISR_ORE)
1913 ++st->rx_out_of_range;
1914 if (isr & EMAC_ISR_IRE)
1915 ++st->rx_in_range;
1916 if (isr & EMAC_ISR_SQE)
1917 ++st->tx_sqe;
1918 if (isr & EMAC_ISR_TE)
1919 ++st->tx_errors;
1920
1921 spin_unlock(&dev->lock);
1922
1923 return IRQ_HANDLED;
1924 }
1925
1926 static struct net_device_stats *emac_stats(struct net_device *ndev)
1927 {
1928 struct emac_instance *dev = netdev_priv(ndev);
1929 struct emac_stats *st = &dev->stats;
1930 struct emac_error_stats *est = &dev->estats;
1931 struct net_device_stats *nst = &dev->nstats;
1932 unsigned long flags;
1933
1934 DBG2(dev, "stats" NL);
1935
1936 /* Compute "legacy" statistics */
1937 spin_lock_irqsave(&dev->lock, flags);
1938 nst->rx_packets = (unsigned long)st->rx_packets;
1939 nst->rx_bytes = (unsigned long)st->rx_bytes;
1940 nst->tx_packets = (unsigned long)st->tx_packets;
1941 nst->tx_bytes = (unsigned long)st->tx_bytes;
1942 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1943 est->rx_dropped_error +
1944 est->rx_dropped_resize +
1945 est->rx_dropped_mtu);
1946 nst->tx_dropped = (unsigned long)est->tx_dropped;
1947
1948 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1949 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1950 est->rx_fifo_overrun +
1951 est->rx_overrun);
1952 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1953 est->rx_alignment_error);
1954 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1955 est->rx_bad_fcs);
1956 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1957 est->rx_bd_short_event +
1958 est->rx_bd_packet_too_long +
1959 est->rx_bd_out_of_range +
1960 est->rx_bd_in_range +
1961 est->rx_runt_packet +
1962 est->rx_short_event +
1963 est->rx_packet_too_long +
1964 est->rx_out_of_range +
1965 est->rx_in_range);
1966
1967 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1968 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1969 est->tx_underrun);
1970 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1971 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1972 est->tx_bd_excessive_collisions +
1973 est->tx_bd_late_collision +
1974 est->tx_bd_multple_collisions);
1975 spin_unlock_irqrestore(&dev->lock, flags);
1976 return nst;
1977 }
1978
1979 static struct mal_commac_ops emac_commac_ops = {
1980 .poll_tx = &emac_poll_tx,
1981 .poll_rx = &emac_poll_rx,
1982 .peek_rx = &emac_peek_rx,
1983 .rxde = &emac_rxde,
1984 };
1985
1986 static struct mal_commac_ops emac_commac_sg_ops = {
1987 .poll_tx = &emac_poll_tx,
1988 .poll_rx = &emac_poll_rx,
1989 .peek_rx = &emac_peek_rx_sg,
1990 .rxde = &emac_rxde,
1991 };
1992
1993 /* Ethtool support */
1994 static int emac_ethtool_get_settings(struct net_device *ndev,
1995 struct ethtool_cmd *cmd)
1996 {
1997 struct emac_instance *dev = netdev_priv(ndev);
1998
1999 cmd->supported = dev->phy.features;
2000 cmd->port = PORT_MII;
2001 cmd->phy_address = dev->phy.address;
2002 cmd->transceiver =
2003 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
2004
2005 mutex_lock(&dev->link_lock);
2006 cmd->advertising = dev->phy.advertising;
2007 cmd->autoneg = dev->phy.autoneg;
2008 cmd->speed = dev->phy.speed;
2009 cmd->duplex = dev->phy.duplex;
2010 mutex_unlock(&dev->link_lock);
2011
2012 return 0;
2013 }
2014
2015 static int emac_ethtool_set_settings(struct net_device *ndev,
2016 struct ethtool_cmd *cmd)
2017 {
2018 struct emac_instance *dev = netdev_priv(ndev);
2019 u32 f = dev->phy.features;
2020
2021 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
2022 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
2023
2024 /* Basic sanity checks */
2025 if (dev->phy.address < 0)
2026 return -EOPNOTSUPP;
2027 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
2028 return -EINVAL;
2029 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
2030 return -EINVAL;
2031 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
2032 return -EINVAL;
2033
2034 if (cmd->autoneg == AUTONEG_DISABLE) {
2035 switch (cmd->speed) {
2036 case SPEED_10:
2037 if (cmd->duplex == DUPLEX_HALF &&
2038 !(f & SUPPORTED_10baseT_Half))
2039 return -EINVAL;
2040 if (cmd->duplex == DUPLEX_FULL &&
2041 !(f & SUPPORTED_10baseT_Full))
2042 return -EINVAL;
2043 break;
2044 case SPEED_100:
2045 if (cmd->duplex == DUPLEX_HALF &&
2046 !(f & SUPPORTED_100baseT_Half))
2047 return -EINVAL;
2048 if (cmd->duplex == DUPLEX_FULL &&
2049 !(f & SUPPORTED_100baseT_Full))
2050 return -EINVAL;
2051 break;
2052 case SPEED_1000:
2053 if (cmd->duplex == DUPLEX_HALF &&
2054 !(f & SUPPORTED_1000baseT_Half))
2055 return -EINVAL;
2056 if (cmd->duplex == DUPLEX_FULL &&
2057 !(f & SUPPORTED_1000baseT_Full))
2058 return -EINVAL;
2059 break;
2060 default:
2061 return -EINVAL;
2062 }
2063
2064 mutex_lock(&dev->link_lock);
2065 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2066 cmd->duplex);
2067 mutex_unlock(&dev->link_lock);
2068
2069 } else {
2070 if (!(f & SUPPORTED_Autoneg))
2071 return -EINVAL;
2072
2073 mutex_lock(&dev->link_lock);
2074 dev->phy.def->ops->setup_aneg(&dev->phy,
2075 (cmd->advertising & f) |
2076 (dev->phy.advertising &
2077 (ADVERTISED_Pause |
2078 ADVERTISED_Asym_Pause)));
2079 mutex_unlock(&dev->link_lock);
2080 }
2081 emac_force_link_update(dev);
2082
2083 return 0;
2084 }
2085
2086 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2087 struct ethtool_ringparam *rp)
2088 {
2089 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2090 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2091 }
2092
2093 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2094 struct ethtool_pauseparam *pp)
2095 {
2096 struct emac_instance *dev = netdev_priv(ndev);
2097
2098 mutex_lock(&dev->link_lock);
2099 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2100 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2101 pp->autoneg = 1;
2102
2103 if (dev->phy.duplex == DUPLEX_FULL) {
2104 if (dev->phy.pause)
2105 pp->rx_pause = pp->tx_pause = 1;
2106 else if (dev->phy.asym_pause)
2107 pp->tx_pause = 1;
2108 }
2109 mutex_unlock(&dev->link_lock);
2110 }
2111
2112 static int emac_get_regs_len(struct emac_instance *dev)
2113 {
2114 return sizeof(struct emac_ethtool_regs_subhdr) +
2115 sizeof(struct emac_regs);
2116 }
2117
2118 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2119 {
2120 struct emac_instance *dev = netdev_priv(ndev);
2121 int size;
2122
2123 size = sizeof(struct emac_ethtool_regs_hdr) +
2124 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2125 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2126 size += zmii_get_regs_len(dev->zmii_dev);
2127 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2128 size += rgmii_get_regs_len(dev->rgmii_dev);
2129 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2130 size += tah_get_regs_len(dev->tah_dev);
2131
2132 return size;
2133 }
2134
2135 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2136 {
2137 struct emac_ethtool_regs_subhdr *hdr = buf;
2138
2139 hdr->index = dev->cell_index;
2140 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2141 hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER;
2142 } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2143 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2144 } else {
2145 hdr->version = EMAC_ETHTOOL_REGS_VER;
2146 }
2147 memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs));
2148 return (void *)(hdr + 1) + sizeof(struct emac_regs);
2149 }
2150
2151 static void emac_ethtool_get_regs(struct net_device *ndev,
2152 struct ethtool_regs *regs, void *buf)
2153 {
2154 struct emac_instance *dev = netdev_priv(ndev);
2155 struct emac_ethtool_regs_hdr *hdr = buf;
2156
2157 hdr->components = 0;
2158 buf = hdr + 1;
2159
2160 buf = mal_dump_regs(dev->mal, buf);
2161 buf = emac_dump_regs(dev, buf);
2162 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2163 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2164 buf = zmii_dump_regs(dev->zmii_dev, buf);
2165 }
2166 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2167 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2168 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2169 }
2170 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2171 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2172 buf = tah_dump_regs(dev->tah_dev, buf);
2173 }
2174 }
2175
2176 static int emac_ethtool_nway_reset(struct net_device *ndev)
2177 {
2178 struct emac_instance *dev = netdev_priv(ndev);
2179 int res = 0;
2180
2181 DBG(dev, "nway_reset" NL);
2182
2183 if (dev->phy.address < 0)
2184 return -EOPNOTSUPP;
2185
2186 mutex_lock(&dev->link_lock);
2187 if (!dev->phy.autoneg) {
2188 res = -EINVAL;
2189 goto out;
2190 }
2191
2192 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2193 out:
2194 mutex_unlock(&dev->link_lock);
2195 emac_force_link_update(dev);
2196 return res;
2197 }
2198
2199 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2200 {
2201 if (stringset == ETH_SS_STATS)
2202 return EMAC_ETHTOOL_STATS_COUNT;
2203 else
2204 return -EINVAL;
2205 }
2206
2207 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2208 u8 * buf)
2209 {
2210 if (stringset == ETH_SS_STATS)
2211 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2212 }
2213
2214 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2215 struct ethtool_stats *estats,
2216 u64 * tmp_stats)
2217 {
2218 struct emac_instance *dev = netdev_priv(ndev);
2219
2220 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2221 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2222 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2223 }
2224
2225 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2226 struct ethtool_drvinfo *info)
2227 {
2228 struct emac_instance *dev = netdev_priv(ndev);
2229
2230 strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
2231 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2232 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
2233 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2234 }
2235
2236 static const struct ethtool_ops emac_ethtool_ops = {
2237 .get_settings = emac_ethtool_get_settings,
2238 .set_settings = emac_ethtool_set_settings,
2239 .get_drvinfo = emac_ethtool_get_drvinfo,
2240
2241 .get_regs_len = emac_ethtool_get_regs_len,
2242 .get_regs = emac_ethtool_get_regs,
2243
2244 .nway_reset = emac_ethtool_nway_reset,
2245
2246 .get_ringparam = emac_ethtool_get_ringparam,
2247 .get_pauseparam = emac_ethtool_get_pauseparam,
2248
2249 .get_strings = emac_ethtool_get_strings,
2250 .get_sset_count = emac_ethtool_get_sset_count,
2251 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2252
2253 .get_link = ethtool_op_get_link,
2254 };
2255
2256 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2257 {
2258 struct emac_instance *dev = netdev_priv(ndev);
2259 struct mii_ioctl_data *data = if_mii(rq);
2260
2261 DBG(dev, "ioctl %08x" NL, cmd);
2262
2263 if (dev->phy.address < 0)
2264 return -EOPNOTSUPP;
2265
2266 switch (cmd) {
2267 case SIOCGMIIPHY:
2268 data->phy_id = dev->phy.address;
2269 /* Fall through */
2270 case SIOCGMIIREG:
2271 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2272 data->reg_num);
2273 return 0;
2274
2275 case SIOCSMIIREG:
2276 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2277 data->val_in);
2278 return 0;
2279 default:
2280 return -EOPNOTSUPP;
2281 }
2282 }
2283
2284 struct emac_depentry {
2285 u32 phandle;
2286 struct device_node *node;
2287 struct platform_device *ofdev;
2288 void *drvdata;
2289 };
2290
2291 #define EMAC_DEP_MAL_IDX 0
2292 #define EMAC_DEP_ZMII_IDX 1
2293 #define EMAC_DEP_RGMII_IDX 2
2294 #define EMAC_DEP_TAH_IDX 3
2295 #define EMAC_DEP_MDIO_IDX 4
2296 #define EMAC_DEP_PREV_IDX 5
2297 #define EMAC_DEP_COUNT 6
2298
2299 static int emac_check_deps(struct emac_instance *dev,
2300 struct emac_depentry *deps)
2301 {
2302 int i, there = 0;
2303 struct device_node *np;
2304
2305 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2306 /* no dependency on that item, allright */
2307 if (deps[i].phandle == 0) {
2308 there++;
2309 continue;
2310 }
2311 /* special case for blist as the dependency might go away */
2312 if (i == EMAC_DEP_PREV_IDX) {
2313 np = *(dev->blist - 1);
2314 if (np == NULL) {
2315 deps[i].phandle = 0;
2316 there++;
2317 continue;
2318 }
2319 if (deps[i].node == NULL)
2320 deps[i].node = of_node_get(np);
2321 }
2322 if (deps[i].node == NULL)
2323 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2324 if (deps[i].node == NULL)
2325 continue;
2326 if (deps[i].ofdev == NULL)
2327 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2328 if (deps[i].ofdev == NULL)
2329 continue;
2330 if (deps[i].drvdata == NULL)
2331 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
2332 if (deps[i].drvdata != NULL)
2333 there++;
2334 }
2335 return there == EMAC_DEP_COUNT;
2336 }
2337
2338 static void emac_put_deps(struct emac_instance *dev)
2339 {
2340 of_dev_put(dev->mal_dev);
2341 of_dev_put(dev->zmii_dev);
2342 of_dev_put(dev->rgmii_dev);
2343 of_dev_put(dev->mdio_dev);
2344 of_dev_put(dev->tah_dev);
2345 }
2346
2347 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
2348 void *data)
2349 {
2350 /* We are only intereted in device addition */
2351 if (action == BUS_NOTIFY_BOUND_DRIVER)
2352 wake_up_all(&emac_probe_wait);
2353 return 0;
2354 }
2355
2356 static struct notifier_block emac_of_bus_notifier = {
2357 .notifier_call = emac_of_bus_notify
2358 };
2359
2360 static int emac_wait_deps(struct emac_instance *dev)
2361 {
2362 struct emac_depentry deps[EMAC_DEP_COUNT];
2363 int i, err;
2364
2365 memset(&deps, 0, sizeof(deps));
2366
2367 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2368 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2369 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2370 if (dev->tah_ph)
2371 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2372 if (dev->mdio_ph)
2373 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2374 if (dev->blist && dev->blist > emac_boot_list)
2375 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2376 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2377 wait_event_timeout(emac_probe_wait,
2378 emac_check_deps(dev, deps),
2379 EMAC_PROBE_DEP_TIMEOUT);
2380 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2381 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2382 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2383 of_node_put(deps[i].node);
2384 if (err)
2385 of_dev_put(deps[i].ofdev);
2386 }
2387 if (err == 0) {
2388 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2389 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2390 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2391 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2392 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2393 }
2394 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2395 return err;
2396 }
2397
2398 static int emac_read_uint_prop(struct device_node *np, const char *name,
2399 u32 *val, int fatal)
2400 {
2401 int len;
2402 const u32 *prop = of_get_property(np, name, &len);
2403 if (prop == NULL || len < sizeof(u32)) {
2404 if (fatal)
2405 printk(KERN_ERR "%s: missing %s property\n",
2406 np->full_name, name);
2407 return -ENODEV;
2408 }
2409 *val = *prop;
2410 return 0;
2411 }
2412
2413 static int emac_init_phy(struct emac_instance *dev)
2414 {
2415 struct device_node *np = dev->ofdev->dev.of_node;
2416 struct net_device *ndev = dev->ndev;
2417 u32 phy_map, adv;
2418 int i;
2419
2420 dev->phy.dev = ndev;
2421 dev->phy.mode = dev->phy_mode;
2422
2423 /* PHY-less configuration.
2424 * XXX I probably should move these settings to the dev tree
2425 */
2426 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2427 emac_reset(dev);
2428
2429 /* PHY-less configuration.
2430 * XXX I probably should move these settings to the dev tree
2431 */
2432 dev->phy.address = -1;
2433 dev->phy.features = SUPPORTED_MII;
2434 if (emac_phy_supports_gige(dev->phy_mode))
2435 dev->phy.features |= SUPPORTED_1000baseT_Full;
2436 else
2437 dev->phy.features |= SUPPORTED_100baseT_Full;
2438 dev->phy.pause = 1;
2439
2440 return 0;
2441 }
2442
2443 mutex_lock(&emac_phy_map_lock);
2444 phy_map = dev->phy_map | busy_phy_map;
2445
2446 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2447
2448 dev->phy.mdio_read = emac_mdio_read;
2449 dev->phy.mdio_write = emac_mdio_write;
2450
2451 /* Enable internal clock source */
2452 #ifdef CONFIG_PPC_DCR_NATIVE
2453 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2454 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2455 #endif
2456 /* PHY clock workaround */
2457 emac_rx_clk_tx(dev);
2458
2459 /* Enable internal clock source on 440GX*/
2460 #ifdef CONFIG_PPC_DCR_NATIVE
2461 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2462 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2463 #endif
2464 /* Configure EMAC with defaults so we can at least use MDIO
2465 * This is needed mostly for 440GX
2466 */
2467 if (emac_phy_gpcs(dev->phy.mode)) {
2468 /* XXX
2469 * Make GPCS PHY address equal to EMAC index.
2470 * We probably should take into account busy_phy_map
2471 * and/or phy_map here.
2472 *
2473 * Note that the busy_phy_map is currently global
2474 * while it should probably be per-ASIC...
2475 */
2476 dev->phy.gpcs_address = dev->gpcs_address;
2477 if (dev->phy.gpcs_address == 0xffffffff)
2478 dev->phy.address = dev->cell_index;
2479 }
2480
2481 emac_configure(dev);
2482
2483 if (dev->phy_address != 0xffffffff)
2484 phy_map = ~(1 << dev->phy_address);
2485
2486 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2487 if (!(phy_map & 1)) {
2488 int r;
2489 busy_phy_map |= 1 << i;
2490
2491 /* Quick check if there is a PHY at the address */
2492 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2493 if (r == 0xffff || r < 0)
2494 continue;
2495 if (!emac_mii_phy_probe(&dev->phy, i))
2496 break;
2497 }
2498
2499 /* Enable external clock source */
2500 #ifdef CONFIG_PPC_DCR_NATIVE
2501 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2502 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2503 #endif
2504 mutex_unlock(&emac_phy_map_lock);
2505 if (i == 0x20) {
2506 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2507 return -ENXIO;
2508 }
2509
2510 /* Init PHY */
2511 if (dev->phy.def->ops->init)
2512 dev->phy.def->ops->init(&dev->phy);
2513
2514 /* Disable any PHY features not supported by the platform */
2515 dev->phy.def->features &= ~dev->phy_feat_exc;
2516 dev->phy.features &= ~dev->phy_feat_exc;
2517
2518 /* Setup initial link parameters */
2519 if (dev->phy.features & SUPPORTED_Autoneg) {
2520 adv = dev->phy.features;
2521 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2522 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2523 /* Restart autonegotiation */
2524 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2525 } else {
2526 u32 f = dev->phy.def->features;
2527 int speed = SPEED_10, fd = DUPLEX_HALF;
2528
2529 /* Select highest supported speed/duplex */
2530 if (f & SUPPORTED_1000baseT_Full) {
2531 speed = SPEED_1000;
2532 fd = DUPLEX_FULL;
2533 } else if (f & SUPPORTED_1000baseT_Half)
2534 speed = SPEED_1000;
2535 else if (f & SUPPORTED_100baseT_Full) {
2536 speed = SPEED_100;
2537 fd = DUPLEX_FULL;
2538 } else if (f & SUPPORTED_100baseT_Half)
2539 speed = SPEED_100;
2540 else if (f & SUPPORTED_10baseT_Full)
2541 fd = DUPLEX_FULL;
2542
2543 /* Force link parameters */
2544 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2545 }
2546 return 0;
2547 }
2548
2549 static int emac_init_config(struct emac_instance *dev)
2550 {
2551 struct device_node *np = dev->ofdev->dev.of_node;
2552 const void *p;
2553
2554 /* Read config from device-tree */
2555 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2556 return -ENXIO;
2557 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2558 return -ENXIO;
2559 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2560 return -ENXIO;
2561 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2562 return -ENXIO;
2563 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2564 dev->max_mtu = ETH_DATA_LEN;
2565 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2566 dev->rx_fifo_size = 2048;
2567 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2568 dev->tx_fifo_size = 2048;
2569 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2570 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2571 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2572 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2573 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2574 dev->phy_address = 0xffffffff;
2575 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2576 dev->phy_map = 0xffffffff;
2577 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2578 dev->gpcs_address = 0xffffffff;
2579 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2580 return -ENXIO;
2581 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2582 dev->tah_ph = 0;
2583 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2584 dev->tah_port = 0;
2585 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2586 dev->mdio_ph = 0;
2587 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2588 dev->zmii_ph = 0;
2589 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2590 dev->zmii_port = 0xffffffff;
2591 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2592 dev->rgmii_ph = 0;
2593 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2594 dev->rgmii_port = 0xffffffff;
2595 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2596 dev->fifo_entry_size = 16;
2597 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2598 dev->mal_burst_size = 256;
2599
2600 /* PHY mode needs some decoding */
2601 dev->phy_mode = of_get_phy_mode(np);
2602 if (dev->phy_mode < 0)
2603 dev->phy_mode = PHY_MODE_NA;
2604
2605 /* Check EMAC version */
2606 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2607 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2608 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2609 of_device_is_compatible(np, "ibm,emac-460gt"))
2610 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2611 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2612 of_device_is_compatible(np, "ibm,emac-405exr"))
2613 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2614 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2615 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2616 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2617 EMAC_FTR_460EX_PHY_CLK_FIX);
2618 }
2619 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2620 dev->features |= EMAC_FTR_EMAC4;
2621 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2622 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2623 } else {
2624 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2625 of_device_is_compatible(np, "ibm,emac-440gr"))
2626 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2627 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2628 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
2629 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2630 #else
2631 printk(KERN_ERR "%s: Flow control not disabled!\n",
2632 np->full_name);
2633 return -ENXIO;
2634 #endif
2635 }
2636
2637 }
2638
2639 /* Fixup some feature bits based on the device tree */
2640 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2641 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2642 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2643 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2644
2645 /* CAB lacks the appropriate properties */
2646 if (of_device_is_compatible(np, "ibm,emac-axon"))
2647 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2648 EMAC_FTR_STACR_OC_INVERT;
2649
2650 /* Enable TAH/ZMII/RGMII features as found */
2651 if (dev->tah_ph != 0) {
2652 #ifdef CONFIG_IBM_EMAC_TAH
2653 dev->features |= EMAC_FTR_HAS_TAH;
2654 #else
2655 printk(KERN_ERR "%s: TAH support not enabled !\n",
2656 np->full_name);
2657 return -ENXIO;
2658 #endif
2659 }
2660
2661 if (dev->zmii_ph != 0) {
2662 #ifdef CONFIG_IBM_EMAC_ZMII
2663 dev->features |= EMAC_FTR_HAS_ZMII;
2664 #else
2665 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2666 np->full_name);
2667 return -ENXIO;
2668 #endif
2669 }
2670
2671 if (dev->rgmii_ph != 0) {
2672 #ifdef CONFIG_IBM_EMAC_RGMII
2673 dev->features |= EMAC_FTR_HAS_RGMII;
2674 #else
2675 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2676 np->full_name);
2677 return -ENXIO;
2678 #endif
2679 }
2680
2681 /* Read MAC-address */
2682 p = of_get_property(np, "local-mac-address", NULL);
2683 if (p == NULL) {
2684 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2685 np->full_name);
2686 return -ENXIO;
2687 }
2688 memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
2689
2690 /* IAHT and GAHT filter parameterization */
2691 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2692 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2693 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2694 } else {
2695 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2696 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2697 }
2698
2699 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2700 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2701 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2702 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2703 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2704
2705 return 0;
2706 }
2707
2708 static const struct net_device_ops emac_netdev_ops = {
2709 .ndo_open = emac_open,
2710 .ndo_stop = emac_close,
2711 .ndo_get_stats = emac_stats,
2712 .ndo_set_rx_mode = emac_set_multicast_list,
2713 .ndo_do_ioctl = emac_ioctl,
2714 .ndo_tx_timeout = emac_tx_timeout,
2715 .ndo_validate_addr = eth_validate_addr,
2716 .ndo_set_mac_address = emac_set_mac_address,
2717 .ndo_start_xmit = emac_start_xmit,
2718 };
2719
2720 static const struct net_device_ops emac_gige_netdev_ops = {
2721 .ndo_open = emac_open,
2722 .ndo_stop = emac_close,
2723 .ndo_get_stats = emac_stats,
2724 .ndo_set_rx_mode = emac_set_multicast_list,
2725 .ndo_do_ioctl = emac_ioctl,
2726 .ndo_tx_timeout = emac_tx_timeout,
2727 .ndo_validate_addr = eth_validate_addr,
2728 .ndo_set_mac_address = emac_set_mac_address,
2729 .ndo_start_xmit = emac_start_xmit_sg,
2730 .ndo_change_mtu = emac_change_mtu,
2731 };
2732
2733 static int emac_probe(struct platform_device *ofdev)
2734 {
2735 struct net_device *ndev;
2736 struct emac_instance *dev;
2737 struct device_node *np = ofdev->dev.of_node;
2738 struct device_node **blist = NULL;
2739 int err, i;
2740
2741 /* Skip unused/unwired EMACS. We leave the check for an unused
2742 * property here for now, but new flat device trees should set a
2743 * status property to "disabled" instead.
2744 */
2745 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2746 return -ENODEV;
2747
2748 /* Find ourselves in the bootlist if we are there */
2749 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2750 if (emac_boot_list[i] == np)
2751 blist = &emac_boot_list[i];
2752
2753 /* Allocate our net_device structure */
2754 err = -ENOMEM;
2755 ndev = alloc_etherdev(sizeof(struct emac_instance));
2756 if (!ndev)
2757 goto err_gone;
2758
2759 dev = netdev_priv(ndev);
2760 dev->ndev = ndev;
2761 dev->ofdev = ofdev;
2762 dev->blist = blist;
2763 SET_NETDEV_DEV(ndev, &ofdev->dev);
2764
2765 /* Initialize some embedded data structures */
2766 mutex_init(&dev->mdio_lock);
2767 mutex_init(&dev->link_lock);
2768 spin_lock_init(&dev->lock);
2769 INIT_WORK(&dev->reset_work, emac_reset_work);
2770
2771 /* Init various config data based on device-tree */
2772 err = emac_init_config(dev);
2773 if (err != 0)
2774 goto err_free;
2775
2776 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2777 dev->emac_irq = irq_of_parse_and_map(np, 0);
2778 dev->wol_irq = irq_of_parse_and_map(np, 1);
2779 if (!dev->emac_irq) {
2780 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2781 goto err_free;
2782 }
2783 ndev->irq = dev->emac_irq;
2784
2785 /* Map EMAC regs */
2786 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2787 printk(KERN_ERR "%s: Can't get registers address\n",
2788 np->full_name);
2789 goto err_irq_unmap;
2790 }
2791 // TODO : request_mem_region
2792 dev->emacp = ioremap(dev->rsrc_regs.start,
2793 resource_size(&dev->rsrc_regs));
2794 if (dev->emacp == NULL) {
2795 printk(KERN_ERR "%s: Can't map device registers!\n",
2796 np->full_name);
2797 err = -ENOMEM;
2798 goto err_irq_unmap;
2799 }
2800
2801 /* Wait for dependent devices */
2802 err = emac_wait_deps(dev);
2803 if (err) {
2804 printk(KERN_ERR
2805 "%s: Timeout waiting for dependent devices\n",
2806 np->full_name);
2807 /* display more info about what's missing ? */
2808 goto err_reg_unmap;
2809 }
2810 dev->mal = platform_get_drvdata(dev->mal_dev);
2811 if (dev->mdio_dev != NULL)
2812 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
2813
2814 /* Register with MAL */
2815 dev->commac.ops = &emac_commac_ops;
2816 dev->commac.dev = dev;
2817 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2818 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2819 err = mal_register_commac(dev->mal, &dev->commac);
2820 if (err) {
2821 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2822 np->full_name, dev->mal_dev->dev.of_node->full_name);
2823 goto err_rel_deps;
2824 }
2825 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2826 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2827
2828 /* Get pointers to BD rings */
2829 dev->tx_desc =
2830 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2831 dev->rx_desc =
2832 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2833
2834 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2835 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2836
2837 /* Clean rings */
2838 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2839 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2840 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2841 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2842
2843 /* Attach to ZMII, if needed */
2844 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2845 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2846 goto err_unreg_commac;
2847
2848 /* Attach to RGMII, if needed */
2849 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2850 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2851 goto err_detach_zmii;
2852
2853 /* Attach to TAH, if needed */
2854 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2855 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2856 goto err_detach_rgmii;
2857
2858 /* Set some link defaults before we can find out real parameters */
2859 dev->phy.speed = SPEED_100;
2860 dev->phy.duplex = DUPLEX_FULL;
2861 dev->phy.autoneg = AUTONEG_DISABLE;
2862 dev->phy.pause = dev->phy.asym_pause = 0;
2863 dev->stop_timeout = STOP_TIMEOUT_100;
2864 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2865
2866 /* Some SoCs like APM821xx does not support Half Duplex mode. */
2867 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
2868 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
2869 SUPPORTED_100baseT_Half |
2870 SUPPORTED_10baseT_Half);
2871 }
2872
2873 /* Find PHY if any */
2874 err = emac_init_phy(dev);
2875 if (err != 0)
2876 goto err_detach_tah;
2877
2878 if (dev->tah_dev) {
2879 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
2880 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
2881 }
2882 ndev->watchdog_timeo = 5 * HZ;
2883 if (emac_phy_supports_gige(dev->phy_mode)) {
2884 ndev->netdev_ops = &emac_gige_netdev_ops;
2885 dev->commac.ops = &emac_commac_sg_ops;
2886 } else
2887 ndev->netdev_ops = &emac_netdev_ops;
2888 ndev->ethtool_ops = &emac_ethtool_ops;
2889
2890 /* MTU range: 46 - 1500 or whatever is in OF */
2891 ndev->min_mtu = EMAC_MIN_MTU;
2892 ndev->max_mtu = dev->max_mtu;
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)
2947 irq_dispose_mapping(dev->wol_irq);
2948 if (dev->emac_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)
2991 irq_dispose_mapping(dev->wol_irq);
2992 if (dev->emac_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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