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[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / ibm / emac / core.c
1 /*
2 * drivers/net/ethernet/ibm/emac/core.c
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller.
5 *
6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
7 * <benh@kernel.crashing.org>
8 *
9 * Based on the arch/ppc version of the driver:
10 *
11 * Copyright (c) 2004, 2005 Zultys Technologies.
12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
13 *
14 * Based on original work by
15 * Matt Porter <mporter@kernel.crashing.org>
16 * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
17 * Armin Kuster <akuster@mvista.com>
18 * Johnnie Peters <jpeters@mvista.com>
19 *
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms of the GNU General Public License as published by the
22 * Free Software Foundation; either version 2 of the License, or (at your
23 * option) any later version.
24 *
25 */
26
27 #include <linux/module.h>
28 #include <linux/sched.h>
29 #include <linux/string.h>
30 #include <linux/errno.h>
31 #include <linux/delay.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/etherdevice.h>
35 #include <linux/skbuff.h>
36 #include <linux/crc32.h>
37 #include <linux/ethtool.h>
38 #include <linux/mii.h>
39 #include <linux/bitops.h>
40 #include <linux/workqueue.h>
41 #include <linux/of.h>
42 #include <linux/of_address.h>
43 #include <linux/of_irq.h>
44 #include <linux/of_net.h>
45 #include <linux/slab.h>
46
47 #include <asm/processor.h>
48 #include <asm/io.h>
49 #include <asm/dma.h>
50 #include <asm/uaccess.h>
51 #include <asm/dcr.h>
52 #include <asm/dcr-regs.h>
53
54 #include "core.h"
55
56 /*
57 * Lack of dma_unmap_???? calls is intentional.
58 *
59 * API-correct usage requires additional support state information to be
60 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
61 * EMAC design (e.g. TX buffer passed from network stack can be split into
62 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
63 * maintaining such information will add additional overhead.
64 * Current DMA API implementation for 4xx processors only ensures cache coherency
65 * and dma_unmap_???? routines are empty and are likely to stay this way.
66 * I decided to omit dma_unmap_??? calls because I don't want to add additional
67 * complexity just for the sake of following some abstract API, when it doesn't
68 * add any real benefit to the driver. I understand that this decision maybe
69 * controversial, but I really tried to make code API-correct and efficient
70 * at the same time and didn't come up with code I liked :(. --ebs
71 */
72
73 #define DRV_NAME "emac"
74 #define DRV_VERSION "3.54"
75 #define DRV_DESC "PPC 4xx OCP EMAC driver"
76
77 MODULE_DESCRIPTION(DRV_DESC);
78 MODULE_AUTHOR
79 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
80 MODULE_LICENSE("GPL");
81
82 /* minimum number of free TX descriptors required to wake up TX process */
83 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
84
85 /* If packet size is less than this number, we allocate small skb and copy packet
86 * contents into it instead of just sending original big skb up
87 */
88 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
89
90 /* Since multiple EMACs share MDIO lines in various ways, we need
91 * to avoid re-using the same PHY ID in cases where the arch didn't
92 * setup precise phy_map entries
93 *
94 * XXX This is something that needs to be reworked as we can have multiple
95 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
96 * probably require in that case to have explicit PHY IDs in the device-tree
97 */
98 static u32 busy_phy_map;
99 static DEFINE_MUTEX(emac_phy_map_lock);
100
101 /* This is the wait queue used to wait on any event related to probe, that
102 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
103 */
104 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
105
106 /* Having stable interface names is a doomed idea. However, it would be nice
107 * if we didn't have completely random interface names at boot too :-) It's
108 * just a matter of making everybody's life easier. Since we are doing
109 * threaded probing, it's a bit harder though. The base idea here is that
110 * we make up a list of all emacs in the device-tree before we register the
111 * driver. Every emac will then wait for the previous one in the list to
112 * initialize before itself. We should also keep that list ordered by
113 * cell_index.
114 * That list is only 4 entries long, meaning that additional EMACs don't
115 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
116 */
117
118 #define EMAC_BOOT_LIST_SIZE 4
119 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
120
121 /* How long should I wait for dependent devices ? */
122 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
123
124 /* I don't want to litter system log with timeout errors
125 * when we have brain-damaged PHY.
126 */
127 static inline void emac_report_timeout_error(struct emac_instance *dev,
128 const char *error)
129 {
130 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
131 EMAC_FTR_460EX_PHY_CLK_FIX |
132 EMAC_FTR_440EP_PHY_CLK_FIX))
133 DBG(dev, "%s" NL, error);
134 else if (net_ratelimit())
135 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
136 error);
137 }
138
139 /* EMAC PHY clock workaround:
140 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
141 * which allows controlling each EMAC clock
142 */
143 static inline void emac_rx_clk_tx(struct emac_instance *dev)
144 {
145 #ifdef CONFIG_PPC_DCR_NATIVE
146 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
147 dcri_clrset(SDR0, SDR0_MFR,
148 0, SDR0_MFR_ECS >> dev->cell_index);
149 #endif
150 }
151
152 static inline void emac_rx_clk_default(struct emac_instance *dev)
153 {
154 #ifdef CONFIG_PPC_DCR_NATIVE
155 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
156 dcri_clrset(SDR0, SDR0_MFR,
157 SDR0_MFR_ECS >> dev->cell_index, 0);
158 #endif
159 }
160
161 /* PHY polling intervals */
162 #define PHY_POLL_LINK_ON HZ
163 #define PHY_POLL_LINK_OFF (HZ / 5)
164
165 /* Graceful stop timeouts in us.
166 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
167 */
168 #define STOP_TIMEOUT_10 1230
169 #define STOP_TIMEOUT_100 124
170 #define STOP_TIMEOUT_1000 13
171 #define STOP_TIMEOUT_1000_JUMBO 73
172
173 static unsigned char default_mcast_addr[] = {
174 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
175 };
176
177 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
178 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
179 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
180 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
181 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
182 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
183 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
184 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
185 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
186 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
187 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
188 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
189 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
190 "tx_bd_excessive_collisions", "tx_bd_late_collision",
191 "tx_bd_multple_collisions", "tx_bd_single_collision",
192 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
193 "tx_errors"
194 };
195
196 static irqreturn_t emac_irq(int irq, void *dev_instance);
197 static void emac_clean_tx_ring(struct emac_instance *dev);
198 static void __emac_set_multicast_list(struct emac_instance *dev);
199
200 static inline int emac_phy_supports_gige(int phy_mode)
201 {
202 return phy_mode == PHY_MODE_GMII ||
203 phy_mode == PHY_MODE_RGMII ||
204 phy_mode == PHY_MODE_SGMII ||
205 phy_mode == PHY_MODE_TBI ||
206 phy_mode == PHY_MODE_RTBI;
207 }
208
209 static inline int emac_phy_gpcs(int phy_mode)
210 {
211 return phy_mode == PHY_MODE_SGMII ||
212 phy_mode == PHY_MODE_TBI ||
213 phy_mode == PHY_MODE_RTBI;
214 }
215
216 static inline void emac_tx_enable(struct emac_instance *dev)
217 {
218 struct emac_regs __iomem *p = dev->emacp;
219 u32 r;
220
221 DBG(dev, "tx_enable" NL);
222
223 r = in_be32(&p->mr0);
224 if (!(r & EMAC_MR0_TXE))
225 out_be32(&p->mr0, r | EMAC_MR0_TXE);
226 }
227
228 static void emac_tx_disable(struct emac_instance *dev)
229 {
230 struct emac_regs __iomem *p = dev->emacp;
231 u32 r;
232
233 DBG(dev, "tx_disable" NL);
234
235 r = in_be32(&p->mr0);
236 if (r & EMAC_MR0_TXE) {
237 int n = dev->stop_timeout;
238 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
239 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
240 udelay(1);
241 --n;
242 }
243 if (unlikely(!n))
244 emac_report_timeout_error(dev, "TX disable timeout");
245 }
246 }
247
248 static void emac_rx_enable(struct emac_instance *dev)
249 {
250 struct emac_regs __iomem *p = dev->emacp;
251 u32 r;
252
253 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
254 goto out;
255
256 DBG(dev, "rx_enable" NL);
257
258 r = in_be32(&p->mr0);
259 if (!(r & EMAC_MR0_RXE)) {
260 if (unlikely(!(r & EMAC_MR0_RXI))) {
261 /* Wait if previous async disable is still in progress */
262 int n = dev->stop_timeout;
263 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
264 udelay(1);
265 --n;
266 }
267 if (unlikely(!n))
268 emac_report_timeout_error(dev,
269 "RX disable timeout");
270 }
271 out_be32(&p->mr0, r | EMAC_MR0_RXE);
272 }
273 out:
274 ;
275 }
276
277 static void emac_rx_disable(struct emac_instance *dev)
278 {
279 struct emac_regs __iomem *p = dev->emacp;
280 u32 r;
281
282 DBG(dev, "rx_disable" NL);
283
284 r = in_be32(&p->mr0);
285 if (r & EMAC_MR0_RXE) {
286 int n = dev->stop_timeout;
287 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
288 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
289 udelay(1);
290 --n;
291 }
292 if (unlikely(!n))
293 emac_report_timeout_error(dev, "RX disable timeout");
294 }
295 }
296
297 static inline void emac_netif_stop(struct emac_instance *dev)
298 {
299 netif_tx_lock_bh(dev->ndev);
300 netif_addr_lock(dev->ndev);
301 dev->no_mcast = 1;
302 netif_addr_unlock(dev->ndev);
303 netif_tx_unlock_bh(dev->ndev);
304 dev->ndev->trans_start = jiffies; /* 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 __emac_set_multicast_list(dev);
981 }
982
983 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
984 {
985 int rx_sync_size = emac_rx_sync_size(new_mtu);
986 int rx_skb_size = emac_rx_skb_size(new_mtu);
987 int i, ret = 0;
988 int mr1_jumbo_bit_change = 0;
989
990 mutex_lock(&dev->link_lock);
991 emac_netif_stop(dev);
992 emac_rx_disable(dev);
993 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
994
995 if (dev->rx_sg_skb) {
996 ++dev->estats.rx_dropped_resize;
997 dev_kfree_skb(dev->rx_sg_skb);
998 dev->rx_sg_skb = NULL;
999 }
1000
1001 /* Make a first pass over RX ring and mark BDs ready, dropping
1002 * non-processed packets on the way. We need this as a separate pass
1003 * to simplify error recovery in the case of allocation failure later.
1004 */
1005 for (i = 0; i < NUM_RX_BUFF; ++i) {
1006 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
1007 ++dev->estats.rx_dropped_resize;
1008
1009 dev->rx_desc[i].data_len = 0;
1010 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
1011 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1012 }
1013
1014 /* Reallocate RX ring only if bigger skb buffers are required */
1015 if (rx_skb_size <= dev->rx_skb_size)
1016 goto skip;
1017
1018 /* Second pass, allocate new skbs */
1019 for (i = 0; i < NUM_RX_BUFF; ++i) {
1020 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
1021 if (!skb) {
1022 ret = -ENOMEM;
1023 goto oom;
1024 }
1025
1026 BUG_ON(!dev->rx_skb[i]);
1027 dev_kfree_skb(dev->rx_skb[i]);
1028
1029 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1030 dev->rx_desc[i].data_ptr =
1031 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1032 DMA_FROM_DEVICE) + 2;
1033 dev->rx_skb[i] = skb;
1034 }
1035 skip:
1036 /* Check if we need to change "Jumbo" bit in MR1 */
1037 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
1038 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
1039 (dev->ndev->mtu > ETH_DATA_LEN);
1040 } else {
1041 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
1042 (dev->ndev->mtu > ETH_DATA_LEN);
1043 }
1044
1045 if (mr1_jumbo_bit_change) {
1046 /* This is to prevent starting RX channel in emac_rx_enable() */
1047 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1048
1049 dev->ndev->mtu = new_mtu;
1050 emac_full_tx_reset(dev);
1051 }
1052
1053 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1054 oom:
1055 /* Restart RX */
1056 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1057 dev->rx_slot = 0;
1058 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1059 emac_rx_enable(dev);
1060 emac_netif_start(dev);
1061 mutex_unlock(&dev->link_lock);
1062
1063 return ret;
1064 }
1065
1066 /* Process ctx, rtnl_lock semaphore */
1067 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1068 {
1069 struct emac_instance *dev = netdev_priv(ndev);
1070 int ret = 0;
1071
1072 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1073 return -EINVAL;
1074
1075 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1076
1077 if (netif_running(ndev)) {
1078 /* Check if we really need to reinitialize RX ring */
1079 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1080 ret = emac_resize_rx_ring(dev, new_mtu);
1081 }
1082
1083 if (!ret) {
1084 ndev->mtu = new_mtu;
1085 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1086 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1087 }
1088
1089 return ret;
1090 }
1091
1092 static void emac_clean_tx_ring(struct emac_instance *dev)
1093 {
1094 int i;
1095
1096 for (i = 0; i < NUM_TX_BUFF; ++i) {
1097 if (dev->tx_skb[i]) {
1098 dev_kfree_skb(dev->tx_skb[i]);
1099 dev->tx_skb[i] = NULL;
1100 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1101 ++dev->estats.tx_dropped;
1102 }
1103 dev->tx_desc[i].ctrl = 0;
1104 dev->tx_desc[i].data_ptr = 0;
1105 }
1106 }
1107
1108 static void emac_clean_rx_ring(struct emac_instance *dev)
1109 {
1110 int i;
1111
1112 for (i = 0; i < NUM_RX_BUFF; ++i)
1113 if (dev->rx_skb[i]) {
1114 dev->rx_desc[i].ctrl = 0;
1115 dev_kfree_skb(dev->rx_skb[i]);
1116 dev->rx_skb[i] = NULL;
1117 dev->rx_desc[i].data_ptr = 0;
1118 }
1119
1120 if (dev->rx_sg_skb) {
1121 dev_kfree_skb(dev->rx_sg_skb);
1122 dev->rx_sg_skb = NULL;
1123 }
1124 }
1125
1126 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1127 gfp_t flags)
1128 {
1129 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1130 if (unlikely(!skb))
1131 return -ENOMEM;
1132
1133 dev->rx_skb[slot] = skb;
1134 dev->rx_desc[slot].data_len = 0;
1135
1136 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1137 dev->rx_desc[slot].data_ptr =
1138 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1139 DMA_FROM_DEVICE) + 2;
1140 wmb();
1141 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1142 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1143
1144 return 0;
1145 }
1146
1147 static void emac_print_link_status(struct emac_instance *dev)
1148 {
1149 if (netif_carrier_ok(dev->ndev))
1150 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1151 dev->ndev->name, dev->phy.speed,
1152 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1153 dev->phy.pause ? ", pause enabled" :
1154 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1155 else
1156 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1157 }
1158
1159 /* Process ctx, rtnl_lock semaphore */
1160 static int emac_open(struct net_device *ndev)
1161 {
1162 struct emac_instance *dev = netdev_priv(ndev);
1163 int err, i;
1164
1165 DBG(dev, "open" NL);
1166
1167 /* Setup error IRQ handler */
1168 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1169 if (err) {
1170 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1171 ndev->name, dev->emac_irq);
1172 return err;
1173 }
1174
1175 /* Allocate RX ring */
1176 for (i = 0; i < NUM_RX_BUFF; ++i)
1177 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1178 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1179 ndev->name);
1180 goto oom;
1181 }
1182
1183 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1184 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1185 dev->rx_sg_skb = NULL;
1186
1187 mutex_lock(&dev->link_lock);
1188 dev->opened = 1;
1189
1190 /* Start PHY polling now.
1191 */
1192 if (dev->phy.address >= 0) {
1193 int link_poll_interval;
1194 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1195 dev->phy.def->ops->read_link(&dev->phy);
1196 emac_rx_clk_default(dev);
1197 netif_carrier_on(dev->ndev);
1198 link_poll_interval = PHY_POLL_LINK_ON;
1199 } else {
1200 emac_rx_clk_tx(dev);
1201 netif_carrier_off(dev->ndev);
1202 link_poll_interval = PHY_POLL_LINK_OFF;
1203 }
1204 dev->link_polling = 1;
1205 wmb();
1206 schedule_delayed_work(&dev->link_work, link_poll_interval);
1207 emac_print_link_status(dev);
1208 } else
1209 netif_carrier_on(dev->ndev);
1210
1211 /* Required for Pause packet support in EMAC */
1212 dev_mc_add_global(ndev, default_mcast_addr);
1213
1214 emac_configure(dev);
1215 mal_poll_add(dev->mal, &dev->commac);
1216 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1217 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1218 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1219 emac_tx_enable(dev);
1220 emac_rx_enable(dev);
1221 emac_netif_start(dev);
1222
1223 mutex_unlock(&dev->link_lock);
1224
1225 return 0;
1226 oom:
1227 emac_clean_rx_ring(dev);
1228 free_irq(dev->emac_irq, dev);
1229
1230 return -ENOMEM;
1231 }
1232
1233 /* BHs disabled */
1234 #if 0
1235 static int emac_link_differs(struct emac_instance *dev)
1236 {
1237 u32 r = in_be32(&dev->emacp->mr1);
1238
1239 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1240 int speed, pause, asym_pause;
1241
1242 if (r & EMAC_MR1_MF_1000)
1243 speed = SPEED_1000;
1244 else if (r & EMAC_MR1_MF_100)
1245 speed = SPEED_100;
1246 else
1247 speed = SPEED_10;
1248
1249 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1250 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1251 pause = 1;
1252 asym_pause = 0;
1253 break;
1254 case EMAC_MR1_APP:
1255 pause = 0;
1256 asym_pause = 1;
1257 break;
1258 default:
1259 pause = asym_pause = 0;
1260 }
1261 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1262 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1263 }
1264 #endif
1265
1266 static void emac_link_timer(struct work_struct *work)
1267 {
1268 struct emac_instance *dev =
1269 container_of(to_delayed_work(work),
1270 struct emac_instance, link_work);
1271 int link_poll_interval;
1272
1273 mutex_lock(&dev->link_lock);
1274 DBG2(dev, "link timer" NL);
1275
1276 if (!dev->opened)
1277 goto bail;
1278
1279 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1280 if (!netif_carrier_ok(dev->ndev)) {
1281 emac_rx_clk_default(dev);
1282 /* Get new link parameters */
1283 dev->phy.def->ops->read_link(&dev->phy);
1284
1285 netif_carrier_on(dev->ndev);
1286 emac_netif_stop(dev);
1287 emac_full_tx_reset(dev);
1288 emac_netif_start(dev);
1289 emac_print_link_status(dev);
1290 }
1291 link_poll_interval = PHY_POLL_LINK_ON;
1292 } else {
1293 if (netif_carrier_ok(dev->ndev)) {
1294 emac_rx_clk_tx(dev);
1295 netif_carrier_off(dev->ndev);
1296 netif_tx_disable(dev->ndev);
1297 emac_reinitialize(dev);
1298 emac_print_link_status(dev);
1299 }
1300 link_poll_interval = PHY_POLL_LINK_OFF;
1301 }
1302 schedule_delayed_work(&dev->link_work, link_poll_interval);
1303 bail:
1304 mutex_unlock(&dev->link_lock);
1305 }
1306
1307 static void emac_force_link_update(struct emac_instance *dev)
1308 {
1309 netif_carrier_off(dev->ndev);
1310 smp_rmb();
1311 if (dev->link_polling) {
1312 cancel_delayed_work_sync(&dev->link_work);
1313 if (dev->link_polling)
1314 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1315 }
1316 }
1317
1318 /* Process ctx, rtnl_lock semaphore */
1319 static int emac_close(struct net_device *ndev)
1320 {
1321 struct emac_instance *dev = netdev_priv(ndev);
1322
1323 DBG(dev, "close" NL);
1324
1325 if (dev->phy.address >= 0) {
1326 dev->link_polling = 0;
1327 cancel_delayed_work_sync(&dev->link_work);
1328 }
1329 mutex_lock(&dev->link_lock);
1330 emac_netif_stop(dev);
1331 dev->opened = 0;
1332 mutex_unlock(&dev->link_lock);
1333
1334 emac_rx_disable(dev);
1335 emac_tx_disable(dev);
1336 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1337 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1338 mal_poll_del(dev->mal, &dev->commac);
1339
1340 emac_clean_tx_ring(dev);
1341 emac_clean_rx_ring(dev);
1342
1343 free_irq(dev->emac_irq, dev);
1344
1345 netif_carrier_off(ndev);
1346
1347 return 0;
1348 }
1349
1350 static inline u16 emac_tx_csum(struct emac_instance *dev,
1351 struct sk_buff *skb)
1352 {
1353 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1354 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1355 ++dev->stats.tx_packets_csum;
1356 return EMAC_TX_CTRL_TAH_CSUM;
1357 }
1358 return 0;
1359 }
1360
1361 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1362 {
1363 struct emac_regs __iomem *p = dev->emacp;
1364 struct net_device *ndev = dev->ndev;
1365
1366 /* Send the packet out. If the if makes a significant perf
1367 * difference, then we can store the TMR0 value in "dev"
1368 * instead
1369 */
1370 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1371 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1372 else
1373 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1374
1375 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1376 netif_stop_queue(ndev);
1377 DBG2(dev, "stopped TX queue" NL);
1378 }
1379
1380 ndev->trans_start = jiffies;
1381 ++dev->stats.tx_packets;
1382 dev->stats.tx_bytes += len;
1383
1384 return NETDEV_TX_OK;
1385 }
1386
1387 /* Tx lock BH */
1388 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1389 {
1390 struct emac_instance *dev = netdev_priv(ndev);
1391 unsigned int len = skb->len;
1392 int slot;
1393
1394 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1395 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1396
1397 slot = dev->tx_slot++;
1398 if (dev->tx_slot == NUM_TX_BUFF) {
1399 dev->tx_slot = 0;
1400 ctrl |= MAL_TX_CTRL_WRAP;
1401 }
1402
1403 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1404
1405 dev->tx_skb[slot] = skb;
1406 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1407 skb->data, len,
1408 DMA_TO_DEVICE);
1409 dev->tx_desc[slot].data_len = (u16) len;
1410 wmb();
1411 dev->tx_desc[slot].ctrl = ctrl;
1412
1413 return emac_xmit_finish(dev, len);
1414 }
1415
1416 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1417 u32 pd, int len, int last, u16 base_ctrl)
1418 {
1419 while (1) {
1420 u16 ctrl = base_ctrl;
1421 int chunk = min(len, MAL_MAX_TX_SIZE);
1422 len -= chunk;
1423
1424 slot = (slot + 1) % NUM_TX_BUFF;
1425
1426 if (last && !len)
1427 ctrl |= MAL_TX_CTRL_LAST;
1428 if (slot == NUM_TX_BUFF - 1)
1429 ctrl |= MAL_TX_CTRL_WRAP;
1430
1431 dev->tx_skb[slot] = NULL;
1432 dev->tx_desc[slot].data_ptr = pd;
1433 dev->tx_desc[slot].data_len = (u16) chunk;
1434 dev->tx_desc[slot].ctrl = ctrl;
1435 ++dev->tx_cnt;
1436
1437 if (!len)
1438 break;
1439
1440 pd += chunk;
1441 }
1442 return slot;
1443 }
1444
1445 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1446 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1447 {
1448 struct emac_instance *dev = netdev_priv(ndev);
1449 int nr_frags = skb_shinfo(skb)->nr_frags;
1450 int len = skb->len, chunk;
1451 int slot, i;
1452 u16 ctrl;
1453 u32 pd;
1454
1455 /* This is common "fast" path */
1456 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1457 return emac_start_xmit(skb, ndev);
1458
1459 len -= skb->data_len;
1460
1461 /* Note, this is only an *estimation*, we can still run out of empty
1462 * slots because of the additional fragmentation into
1463 * MAL_MAX_TX_SIZE-sized chunks
1464 */
1465 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1466 goto stop_queue;
1467
1468 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1469 emac_tx_csum(dev, skb);
1470 slot = dev->tx_slot;
1471
1472 /* skb data */
1473 dev->tx_skb[slot] = NULL;
1474 chunk = min(len, MAL_MAX_TX_SIZE);
1475 dev->tx_desc[slot].data_ptr = pd =
1476 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1477 dev->tx_desc[slot].data_len = (u16) chunk;
1478 len -= chunk;
1479 if (unlikely(len))
1480 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1481 ctrl);
1482 /* skb fragments */
1483 for (i = 0; i < nr_frags; ++i) {
1484 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1485 len = skb_frag_size(frag);
1486
1487 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1488 goto undo_frame;
1489
1490 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1491 DMA_TO_DEVICE);
1492
1493 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1494 ctrl);
1495 }
1496
1497 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1498
1499 /* Attach skb to the last slot so we don't release it too early */
1500 dev->tx_skb[slot] = skb;
1501
1502 /* Send the packet out */
1503 if (dev->tx_slot == NUM_TX_BUFF - 1)
1504 ctrl |= MAL_TX_CTRL_WRAP;
1505 wmb();
1506 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1507 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1508
1509 return emac_xmit_finish(dev, skb->len);
1510
1511 undo_frame:
1512 /* Well, too bad. Our previous estimation was overly optimistic.
1513 * Undo everything.
1514 */
1515 while (slot != dev->tx_slot) {
1516 dev->tx_desc[slot].ctrl = 0;
1517 --dev->tx_cnt;
1518 if (--slot < 0)
1519 slot = NUM_TX_BUFF - 1;
1520 }
1521 ++dev->estats.tx_undo;
1522
1523 stop_queue:
1524 netif_stop_queue(ndev);
1525 DBG2(dev, "stopped TX queue" NL);
1526 return NETDEV_TX_BUSY;
1527 }
1528
1529 /* Tx lock BHs */
1530 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1531 {
1532 struct emac_error_stats *st = &dev->estats;
1533
1534 DBG(dev, "BD TX error %04x" NL, ctrl);
1535
1536 ++st->tx_bd_errors;
1537 if (ctrl & EMAC_TX_ST_BFCS)
1538 ++st->tx_bd_bad_fcs;
1539 if (ctrl & EMAC_TX_ST_LCS)
1540 ++st->tx_bd_carrier_loss;
1541 if (ctrl & EMAC_TX_ST_ED)
1542 ++st->tx_bd_excessive_deferral;
1543 if (ctrl & EMAC_TX_ST_EC)
1544 ++st->tx_bd_excessive_collisions;
1545 if (ctrl & EMAC_TX_ST_LC)
1546 ++st->tx_bd_late_collision;
1547 if (ctrl & EMAC_TX_ST_MC)
1548 ++st->tx_bd_multple_collisions;
1549 if (ctrl & EMAC_TX_ST_SC)
1550 ++st->tx_bd_single_collision;
1551 if (ctrl & EMAC_TX_ST_UR)
1552 ++st->tx_bd_underrun;
1553 if (ctrl & EMAC_TX_ST_SQE)
1554 ++st->tx_bd_sqe;
1555 }
1556
1557 static void emac_poll_tx(void *param)
1558 {
1559 struct emac_instance *dev = param;
1560 u32 bad_mask;
1561
1562 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1563
1564 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1565 bad_mask = EMAC_IS_BAD_TX_TAH;
1566 else
1567 bad_mask = EMAC_IS_BAD_TX;
1568
1569 netif_tx_lock_bh(dev->ndev);
1570 if (dev->tx_cnt) {
1571 u16 ctrl;
1572 int slot = dev->ack_slot, n = 0;
1573 again:
1574 ctrl = dev->tx_desc[slot].ctrl;
1575 if (!(ctrl & MAL_TX_CTRL_READY)) {
1576 struct sk_buff *skb = dev->tx_skb[slot];
1577 ++n;
1578
1579 if (skb) {
1580 dev_kfree_skb(skb);
1581 dev->tx_skb[slot] = NULL;
1582 }
1583 slot = (slot + 1) % NUM_TX_BUFF;
1584
1585 if (unlikely(ctrl & bad_mask))
1586 emac_parse_tx_error(dev, ctrl);
1587
1588 if (--dev->tx_cnt)
1589 goto again;
1590 }
1591 if (n) {
1592 dev->ack_slot = slot;
1593 if (netif_queue_stopped(dev->ndev) &&
1594 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1595 netif_wake_queue(dev->ndev);
1596
1597 DBG2(dev, "tx %d pkts" NL, n);
1598 }
1599 }
1600 netif_tx_unlock_bh(dev->ndev);
1601 }
1602
1603 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1604 int len)
1605 {
1606 struct sk_buff *skb = dev->rx_skb[slot];
1607
1608 DBG2(dev, "recycle %d %d" NL, slot, len);
1609
1610 if (len)
1611 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1612 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1613
1614 dev->rx_desc[slot].data_len = 0;
1615 wmb();
1616 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1617 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1618 }
1619
1620 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1621 {
1622 struct emac_error_stats *st = &dev->estats;
1623
1624 DBG(dev, "BD RX error %04x" NL, ctrl);
1625
1626 ++st->rx_bd_errors;
1627 if (ctrl & EMAC_RX_ST_OE)
1628 ++st->rx_bd_overrun;
1629 if (ctrl & EMAC_RX_ST_BP)
1630 ++st->rx_bd_bad_packet;
1631 if (ctrl & EMAC_RX_ST_RP)
1632 ++st->rx_bd_runt_packet;
1633 if (ctrl & EMAC_RX_ST_SE)
1634 ++st->rx_bd_short_event;
1635 if (ctrl & EMAC_RX_ST_AE)
1636 ++st->rx_bd_alignment_error;
1637 if (ctrl & EMAC_RX_ST_BFCS)
1638 ++st->rx_bd_bad_fcs;
1639 if (ctrl & EMAC_RX_ST_PTL)
1640 ++st->rx_bd_packet_too_long;
1641 if (ctrl & EMAC_RX_ST_ORE)
1642 ++st->rx_bd_out_of_range;
1643 if (ctrl & EMAC_RX_ST_IRE)
1644 ++st->rx_bd_in_range;
1645 }
1646
1647 static inline void emac_rx_csum(struct emac_instance *dev,
1648 struct sk_buff *skb, u16 ctrl)
1649 {
1650 #ifdef CONFIG_IBM_EMAC_TAH
1651 if (!ctrl && dev->tah_dev) {
1652 skb->ip_summed = CHECKSUM_UNNECESSARY;
1653 ++dev->stats.rx_packets_csum;
1654 }
1655 #endif
1656 }
1657
1658 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1659 {
1660 if (likely(dev->rx_sg_skb != NULL)) {
1661 int len = dev->rx_desc[slot].data_len;
1662 int tot_len = dev->rx_sg_skb->len + len;
1663
1664 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1665 ++dev->estats.rx_dropped_mtu;
1666 dev_kfree_skb(dev->rx_sg_skb);
1667 dev->rx_sg_skb = NULL;
1668 } else {
1669 memcpy(skb_tail_pointer(dev->rx_sg_skb),
1670 dev->rx_skb[slot]->data, len);
1671 skb_put(dev->rx_sg_skb, len);
1672 emac_recycle_rx_skb(dev, slot, len);
1673 return 0;
1674 }
1675 }
1676 emac_recycle_rx_skb(dev, slot, 0);
1677 return -1;
1678 }
1679
1680 /* NAPI poll context */
1681 static int emac_poll_rx(void *param, int budget)
1682 {
1683 struct emac_instance *dev = param;
1684 int slot = dev->rx_slot, received = 0;
1685
1686 DBG2(dev, "poll_rx(%d)" NL, budget);
1687
1688 again:
1689 while (budget > 0) {
1690 int len;
1691 struct sk_buff *skb;
1692 u16 ctrl = dev->rx_desc[slot].ctrl;
1693
1694 if (ctrl & MAL_RX_CTRL_EMPTY)
1695 break;
1696
1697 skb = dev->rx_skb[slot];
1698 mb();
1699 len = dev->rx_desc[slot].data_len;
1700
1701 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1702 goto sg;
1703
1704 ctrl &= EMAC_BAD_RX_MASK;
1705 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1706 emac_parse_rx_error(dev, ctrl);
1707 ++dev->estats.rx_dropped_error;
1708 emac_recycle_rx_skb(dev, slot, 0);
1709 len = 0;
1710 goto next;
1711 }
1712
1713 if (len < ETH_HLEN) {
1714 ++dev->estats.rx_dropped_stack;
1715 emac_recycle_rx_skb(dev, slot, len);
1716 goto next;
1717 }
1718
1719 if (len && len < EMAC_RX_COPY_THRESH) {
1720 struct sk_buff *copy_skb =
1721 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1722 if (unlikely(!copy_skb))
1723 goto oom;
1724
1725 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1726 memcpy(copy_skb->data - 2, skb->data - 2, len + 2);
1727 emac_recycle_rx_skb(dev, slot, len);
1728 skb = copy_skb;
1729 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1730 goto oom;
1731
1732 skb_put(skb, len);
1733 push_packet:
1734 skb->protocol = eth_type_trans(skb, dev->ndev);
1735 emac_rx_csum(dev, skb, ctrl);
1736
1737 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1738 ++dev->estats.rx_dropped_stack;
1739 next:
1740 ++dev->stats.rx_packets;
1741 skip:
1742 dev->stats.rx_bytes += len;
1743 slot = (slot + 1) % NUM_RX_BUFF;
1744 --budget;
1745 ++received;
1746 continue;
1747 sg:
1748 if (ctrl & MAL_RX_CTRL_FIRST) {
1749 BUG_ON(dev->rx_sg_skb);
1750 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1751 DBG(dev, "rx OOM %d" NL, slot);
1752 ++dev->estats.rx_dropped_oom;
1753 emac_recycle_rx_skb(dev, slot, 0);
1754 } else {
1755 dev->rx_sg_skb = skb;
1756 skb_put(skb, len);
1757 }
1758 } else if (!emac_rx_sg_append(dev, slot) &&
1759 (ctrl & MAL_RX_CTRL_LAST)) {
1760
1761 skb = dev->rx_sg_skb;
1762 dev->rx_sg_skb = NULL;
1763
1764 ctrl &= EMAC_BAD_RX_MASK;
1765 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1766 emac_parse_rx_error(dev, ctrl);
1767 ++dev->estats.rx_dropped_error;
1768 dev_kfree_skb(skb);
1769 len = 0;
1770 } else
1771 goto push_packet;
1772 }
1773 goto skip;
1774 oom:
1775 DBG(dev, "rx OOM %d" NL, slot);
1776 /* Drop the packet and recycle skb */
1777 ++dev->estats.rx_dropped_oom;
1778 emac_recycle_rx_skb(dev, slot, 0);
1779 goto next;
1780 }
1781
1782 if (received) {
1783 DBG2(dev, "rx %d BDs" NL, received);
1784 dev->rx_slot = slot;
1785 }
1786
1787 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1788 mb();
1789 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1790 DBG2(dev, "rx restart" NL);
1791 received = 0;
1792 goto again;
1793 }
1794
1795 if (dev->rx_sg_skb) {
1796 DBG2(dev, "dropping partial rx packet" NL);
1797 ++dev->estats.rx_dropped_error;
1798 dev_kfree_skb(dev->rx_sg_skb);
1799 dev->rx_sg_skb = NULL;
1800 }
1801
1802 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1803 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1804 emac_rx_enable(dev);
1805 dev->rx_slot = 0;
1806 }
1807 return received;
1808 }
1809
1810 /* NAPI poll context */
1811 static int emac_peek_rx(void *param)
1812 {
1813 struct emac_instance *dev = param;
1814
1815 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1816 }
1817
1818 /* NAPI poll context */
1819 static int emac_peek_rx_sg(void *param)
1820 {
1821 struct emac_instance *dev = param;
1822
1823 int slot = dev->rx_slot;
1824 while (1) {
1825 u16 ctrl = dev->rx_desc[slot].ctrl;
1826 if (ctrl & MAL_RX_CTRL_EMPTY)
1827 return 0;
1828 else if (ctrl & MAL_RX_CTRL_LAST)
1829 return 1;
1830
1831 slot = (slot + 1) % NUM_RX_BUFF;
1832
1833 /* I'm just being paranoid here :) */
1834 if (unlikely(slot == dev->rx_slot))
1835 return 0;
1836 }
1837 }
1838
1839 /* Hard IRQ */
1840 static void emac_rxde(void *param)
1841 {
1842 struct emac_instance *dev = param;
1843
1844 ++dev->estats.rx_stopped;
1845 emac_rx_disable_async(dev);
1846 }
1847
1848 /* Hard IRQ */
1849 static irqreturn_t emac_irq(int irq, void *dev_instance)
1850 {
1851 struct emac_instance *dev = dev_instance;
1852 struct emac_regs __iomem *p = dev->emacp;
1853 struct emac_error_stats *st = &dev->estats;
1854 u32 isr;
1855
1856 spin_lock(&dev->lock);
1857
1858 isr = in_be32(&p->isr);
1859 out_be32(&p->isr, isr);
1860
1861 DBG(dev, "isr = %08x" NL, isr);
1862
1863 if (isr & EMAC4_ISR_TXPE)
1864 ++st->tx_parity;
1865 if (isr & EMAC4_ISR_RXPE)
1866 ++st->rx_parity;
1867 if (isr & EMAC4_ISR_TXUE)
1868 ++st->tx_underrun;
1869 if (isr & EMAC4_ISR_RXOE)
1870 ++st->rx_fifo_overrun;
1871 if (isr & EMAC_ISR_OVR)
1872 ++st->rx_overrun;
1873 if (isr & EMAC_ISR_BP)
1874 ++st->rx_bad_packet;
1875 if (isr & EMAC_ISR_RP)
1876 ++st->rx_runt_packet;
1877 if (isr & EMAC_ISR_SE)
1878 ++st->rx_short_event;
1879 if (isr & EMAC_ISR_ALE)
1880 ++st->rx_alignment_error;
1881 if (isr & EMAC_ISR_BFCS)
1882 ++st->rx_bad_fcs;
1883 if (isr & EMAC_ISR_PTLE)
1884 ++st->rx_packet_too_long;
1885 if (isr & EMAC_ISR_ORE)
1886 ++st->rx_out_of_range;
1887 if (isr & EMAC_ISR_IRE)
1888 ++st->rx_in_range;
1889 if (isr & EMAC_ISR_SQE)
1890 ++st->tx_sqe;
1891 if (isr & EMAC_ISR_TE)
1892 ++st->tx_errors;
1893
1894 spin_unlock(&dev->lock);
1895
1896 return IRQ_HANDLED;
1897 }
1898
1899 static struct net_device_stats *emac_stats(struct net_device *ndev)
1900 {
1901 struct emac_instance *dev = netdev_priv(ndev);
1902 struct emac_stats *st = &dev->stats;
1903 struct emac_error_stats *est = &dev->estats;
1904 struct net_device_stats *nst = &dev->nstats;
1905 unsigned long flags;
1906
1907 DBG2(dev, "stats" NL);
1908
1909 /* Compute "legacy" statistics */
1910 spin_lock_irqsave(&dev->lock, flags);
1911 nst->rx_packets = (unsigned long)st->rx_packets;
1912 nst->rx_bytes = (unsigned long)st->rx_bytes;
1913 nst->tx_packets = (unsigned long)st->tx_packets;
1914 nst->tx_bytes = (unsigned long)st->tx_bytes;
1915 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1916 est->rx_dropped_error +
1917 est->rx_dropped_resize +
1918 est->rx_dropped_mtu);
1919 nst->tx_dropped = (unsigned long)est->tx_dropped;
1920
1921 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1922 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1923 est->rx_fifo_overrun +
1924 est->rx_overrun);
1925 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1926 est->rx_alignment_error);
1927 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1928 est->rx_bad_fcs);
1929 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1930 est->rx_bd_short_event +
1931 est->rx_bd_packet_too_long +
1932 est->rx_bd_out_of_range +
1933 est->rx_bd_in_range +
1934 est->rx_runt_packet +
1935 est->rx_short_event +
1936 est->rx_packet_too_long +
1937 est->rx_out_of_range +
1938 est->rx_in_range);
1939
1940 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1941 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1942 est->tx_underrun);
1943 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1944 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1945 est->tx_bd_excessive_collisions +
1946 est->tx_bd_late_collision +
1947 est->tx_bd_multple_collisions);
1948 spin_unlock_irqrestore(&dev->lock, flags);
1949 return nst;
1950 }
1951
1952 static struct mal_commac_ops emac_commac_ops = {
1953 .poll_tx = &emac_poll_tx,
1954 .poll_rx = &emac_poll_rx,
1955 .peek_rx = &emac_peek_rx,
1956 .rxde = &emac_rxde,
1957 };
1958
1959 static struct mal_commac_ops emac_commac_sg_ops = {
1960 .poll_tx = &emac_poll_tx,
1961 .poll_rx = &emac_poll_rx,
1962 .peek_rx = &emac_peek_rx_sg,
1963 .rxde = &emac_rxde,
1964 };
1965
1966 /* Ethtool support */
1967 static int emac_ethtool_get_settings(struct net_device *ndev,
1968 struct ethtool_cmd *cmd)
1969 {
1970 struct emac_instance *dev = netdev_priv(ndev);
1971
1972 cmd->supported = dev->phy.features;
1973 cmd->port = PORT_MII;
1974 cmd->phy_address = dev->phy.address;
1975 cmd->transceiver =
1976 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
1977
1978 mutex_lock(&dev->link_lock);
1979 cmd->advertising = dev->phy.advertising;
1980 cmd->autoneg = dev->phy.autoneg;
1981 cmd->speed = dev->phy.speed;
1982 cmd->duplex = dev->phy.duplex;
1983 mutex_unlock(&dev->link_lock);
1984
1985 return 0;
1986 }
1987
1988 static int emac_ethtool_set_settings(struct net_device *ndev,
1989 struct ethtool_cmd *cmd)
1990 {
1991 struct emac_instance *dev = netdev_priv(ndev);
1992 u32 f = dev->phy.features;
1993
1994 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
1995 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
1996
1997 /* Basic sanity checks */
1998 if (dev->phy.address < 0)
1999 return -EOPNOTSUPP;
2000 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
2001 return -EINVAL;
2002 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
2003 return -EINVAL;
2004 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
2005 return -EINVAL;
2006
2007 if (cmd->autoneg == AUTONEG_DISABLE) {
2008 switch (cmd->speed) {
2009 case SPEED_10:
2010 if (cmd->duplex == DUPLEX_HALF &&
2011 !(f & SUPPORTED_10baseT_Half))
2012 return -EINVAL;
2013 if (cmd->duplex == DUPLEX_FULL &&
2014 !(f & SUPPORTED_10baseT_Full))
2015 return -EINVAL;
2016 break;
2017 case SPEED_100:
2018 if (cmd->duplex == DUPLEX_HALF &&
2019 !(f & SUPPORTED_100baseT_Half))
2020 return -EINVAL;
2021 if (cmd->duplex == DUPLEX_FULL &&
2022 !(f & SUPPORTED_100baseT_Full))
2023 return -EINVAL;
2024 break;
2025 case SPEED_1000:
2026 if (cmd->duplex == DUPLEX_HALF &&
2027 !(f & SUPPORTED_1000baseT_Half))
2028 return -EINVAL;
2029 if (cmd->duplex == DUPLEX_FULL &&
2030 !(f & SUPPORTED_1000baseT_Full))
2031 return -EINVAL;
2032 break;
2033 default:
2034 return -EINVAL;
2035 }
2036
2037 mutex_lock(&dev->link_lock);
2038 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2039 cmd->duplex);
2040 mutex_unlock(&dev->link_lock);
2041
2042 } else {
2043 if (!(f & SUPPORTED_Autoneg))
2044 return -EINVAL;
2045
2046 mutex_lock(&dev->link_lock);
2047 dev->phy.def->ops->setup_aneg(&dev->phy,
2048 (cmd->advertising & f) |
2049 (dev->phy.advertising &
2050 (ADVERTISED_Pause |
2051 ADVERTISED_Asym_Pause)));
2052 mutex_unlock(&dev->link_lock);
2053 }
2054 emac_force_link_update(dev);
2055
2056 return 0;
2057 }
2058
2059 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2060 struct ethtool_ringparam *rp)
2061 {
2062 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2063 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2064 }
2065
2066 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2067 struct ethtool_pauseparam *pp)
2068 {
2069 struct emac_instance *dev = netdev_priv(ndev);
2070
2071 mutex_lock(&dev->link_lock);
2072 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2073 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2074 pp->autoneg = 1;
2075
2076 if (dev->phy.duplex == DUPLEX_FULL) {
2077 if (dev->phy.pause)
2078 pp->rx_pause = pp->tx_pause = 1;
2079 else if (dev->phy.asym_pause)
2080 pp->tx_pause = 1;
2081 }
2082 mutex_unlock(&dev->link_lock);
2083 }
2084
2085 static int emac_get_regs_len(struct emac_instance *dev)
2086 {
2087 return sizeof(struct emac_ethtool_regs_subhdr) +
2088 sizeof(struct emac_regs);
2089 }
2090
2091 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2092 {
2093 struct emac_instance *dev = netdev_priv(ndev);
2094 int size;
2095
2096 size = sizeof(struct emac_ethtool_regs_hdr) +
2097 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2098 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2099 size += zmii_get_regs_len(dev->zmii_dev);
2100 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2101 size += rgmii_get_regs_len(dev->rgmii_dev);
2102 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2103 size += tah_get_regs_len(dev->tah_dev);
2104
2105 return size;
2106 }
2107
2108 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2109 {
2110 struct emac_ethtool_regs_subhdr *hdr = buf;
2111
2112 hdr->index = dev->cell_index;
2113 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2114 hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER;
2115 } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2116 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2117 } else {
2118 hdr->version = EMAC_ETHTOOL_REGS_VER;
2119 }
2120 memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs));
2121 return (void *)(hdr + 1) + sizeof(struct emac_regs);
2122 }
2123
2124 static void emac_ethtool_get_regs(struct net_device *ndev,
2125 struct ethtool_regs *regs, void *buf)
2126 {
2127 struct emac_instance *dev = netdev_priv(ndev);
2128 struct emac_ethtool_regs_hdr *hdr = buf;
2129
2130 hdr->components = 0;
2131 buf = hdr + 1;
2132
2133 buf = mal_dump_regs(dev->mal, buf);
2134 buf = emac_dump_regs(dev, buf);
2135 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2136 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2137 buf = zmii_dump_regs(dev->zmii_dev, buf);
2138 }
2139 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2140 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2141 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2142 }
2143 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2144 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2145 buf = tah_dump_regs(dev->tah_dev, buf);
2146 }
2147 }
2148
2149 static int emac_ethtool_nway_reset(struct net_device *ndev)
2150 {
2151 struct emac_instance *dev = netdev_priv(ndev);
2152 int res = 0;
2153
2154 DBG(dev, "nway_reset" NL);
2155
2156 if (dev->phy.address < 0)
2157 return -EOPNOTSUPP;
2158
2159 mutex_lock(&dev->link_lock);
2160 if (!dev->phy.autoneg) {
2161 res = -EINVAL;
2162 goto out;
2163 }
2164
2165 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2166 out:
2167 mutex_unlock(&dev->link_lock);
2168 emac_force_link_update(dev);
2169 return res;
2170 }
2171
2172 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2173 {
2174 if (stringset == ETH_SS_STATS)
2175 return EMAC_ETHTOOL_STATS_COUNT;
2176 else
2177 return -EINVAL;
2178 }
2179
2180 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2181 u8 * buf)
2182 {
2183 if (stringset == ETH_SS_STATS)
2184 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2185 }
2186
2187 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2188 struct ethtool_stats *estats,
2189 u64 * tmp_stats)
2190 {
2191 struct emac_instance *dev = netdev_priv(ndev);
2192
2193 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2194 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2195 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2196 }
2197
2198 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2199 struct ethtool_drvinfo *info)
2200 {
2201 struct emac_instance *dev = netdev_priv(ndev);
2202
2203 strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
2204 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2205 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
2206 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2207 info->regdump_len = emac_ethtool_get_regs_len(ndev);
2208 }
2209
2210 static const struct ethtool_ops emac_ethtool_ops = {
2211 .get_settings = emac_ethtool_get_settings,
2212 .set_settings = emac_ethtool_set_settings,
2213 .get_drvinfo = emac_ethtool_get_drvinfo,
2214
2215 .get_regs_len = emac_ethtool_get_regs_len,
2216 .get_regs = emac_ethtool_get_regs,
2217
2218 .nway_reset = emac_ethtool_nway_reset,
2219
2220 .get_ringparam = emac_ethtool_get_ringparam,
2221 .get_pauseparam = emac_ethtool_get_pauseparam,
2222
2223 .get_strings = emac_ethtool_get_strings,
2224 .get_sset_count = emac_ethtool_get_sset_count,
2225 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2226
2227 .get_link = ethtool_op_get_link,
2228 };
2229
2230 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2231 {
2232 struct emac_instance *dev = netdev_priv(ndev);
2233 struct mii_ioctl_data *data = if_mii(rq);
2234
2235 DBG(dev, "ioctl %08x" NL, cmd);
2236
2237 if (dev->phy.address < 0)
2238 return -EOPNOTSUPP;
2239
2240 switch (cmd) {
2241 case SIOCGMIIPHY:
2242 data->phy_id = dev->phy.address;
2243 /* Fall through */
2244 case SIOCGMIIREG:
2245 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2246 data->reg_num);
2247 return 0;
2248
2249 case SIOCSMIIREG:
2250 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2251 data->val_in);
2252 return 0;
2253 default:
2254 return -EOPNOTSUPP;
2255 }
2256 }
2257
2258 struct emac_depentry {
2259 u32 phandle;
2260 struct device_node *node;
2261 struct platform_device *ofdev;
2262 void *drvdata;
2263 };
2264
2265 #define EMAC_DEP_MAL_IDX 0
2266 #define EMAC_DEP_ZMII_IDX 1
2267 #define EMAC_DEP_RGMII_IDX 2
2268 #define EMAC_DEP_TAH_IDX 3
2269 #define EMAC_DEP_MDIO_IDX 4
2270 #define EMAC_DEP_PREV_IDX 5
2271 #define EMAC_DEP_COUNT 6
2272
2273 static int emac_check_deps(struct emac_instance *dev,
2274 struct emac_depentry *deps)
2275 {
2276 int i, there = 0;
2277 struct device_node *np;
2278
2279 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2280 /* no dependency on that item, allright */
2281 if (deps[i].phandle == 0) {
2282 there++;
2283 continue;
2284 }
2285 /* special case for blist as the dependency might go away */
2286 if (i == EMAC_DEP_PREV_IDX) {
2287 np = *(dev->blist - 1);
2288 if (np == NULL) {
2289 deps[i].phandle = 0;
2290 there++;
2291 continue;
2292 }
2293 if (deps[i].node == NULL)
2294 deps[i].node = of_node_get(np);
2295 }
2296 if (deps[i].node == NULL)
2297 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2298 if (deps[i].node == NULL)
2299 continue;
2300 if (deps[i].ofdev == NULL)
2301 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2302 if (deps[i].ofdev == NULL)
2303 continue;
2304 if (deps[i].drvdata == NULL)
2305 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
2306 if (deps[i].drvdata != NULL)
2307 there++;
2308 }
2309 return there == EMAC_DEP_COUNT;
2310 }
2311
2312 static void emac_put_deps(struct emac_instance *dev)
2313 {
2314 of_dev_put(dev->mal_dev);
2315 of_dev_put(dev->zmii_dev);
2316 of_dev_put(dev->rgmii_dev);
2317 of_dev_put(dev->mdio_dev);
2318 of_dev_put(dev->tah_dev);
2319 }
2320
2321 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
2322 void *data)
2323 {
2324 /* We are only intereted in device addition */
2325 if (action == BUS_NOTIFY_BOUND_DRIVER)
2326 wake_up_all(&emac_probe_wait);
2327 return 0;
2328 }
2329
2330 static struct notifier_block emac_of_bus_notifier = {
2331 .notifier_call = emac_of_bus_notify
2332 };
2333
2334 static int emac_wait_deps(struct emac_instance *dev)
2335 {
2336 struct emac_depentry deps[EMAC_DEP_COUNT];
2337 int i, err;
2338
2339 memset(&deps, 0, sizeof(deps));
2340
2341 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2342 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2343 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2344 if (dev->tah_ph)
2345 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2346 if (dev->mdio_ph)
2347 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2348 if (dev->blist && dev->blist > emac_boot_list)
2349 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2350 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2351 wait_event_timeout(emac_probe_wait,
2352 emac_check_deps(dev, deps),
2353 EMAC_PROBE_DEP_TIMEOUT);
2354 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2355 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2356 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2357 of_node_put(deps[i].node);
2358 if (err)
2359 of_dev_put(deps[i].ofdev);
2360 }
2361 if (err == 0) {
2362 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2363 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2364 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2365 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2366 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2367 }
2368 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2369 return err;
2370 }
2371
2372 static int emac_read_uint_prop(struct device_node *np, const char *name,
2373 u32 *val, int fatal)
2374 {
2375 int len;
2376 const u32 *prop = of_get_property(np, name, &len);
2377 if (prop == NULL || len < sizeof(u32)) {
2378 if (fatal)
2379 printk(KERN_ERR "%s: missing %s property\n",
2380 np->full_name, name);
2381 return -ENODEV;
2382 }
2383 *val = *prop;
2384 return 0;
2385 }
2386
2387 static int emac_init_phy(struct emac_instance *dev)
2388 {
2389 struct device_node *np = dev->ofdev->dev.of_node;
2390 struct net_device *ndev = dev->ndev;
2391 u32 phy_map, adv;
2392 int i;
2393
2394 dev->phy.dev = ndev;
2395 dev->phy.mode = dev->phy_mode;
2396
2397 /* PHY-less configuration.
2398 * XXX I probably should move these settings to the dev tree
2399 */
2400 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2401 emac_reset(dev);
2402
2403 /* PHY-less configuration.
2404 * XXX I probably should move these settings to the dev tree
2405 */
2406 dev->phy.address = -1;
2407 dev->phy.features = SUPPORTED_MII;
2408 if (emac_phy_supports_gige(dev->phy_mode))
2409 dev->phy.features |= SUPPORTED_1000baseT_Full;
2410 else
2411 dev->phy.features |= SUPPORTED_100baseT_Full;
2412 dev->phy.pause = 1;
2413
2414 return 0;
2415 }
2416
2417 mutex_lock(&emac_phy_map_lock);
2418 phy_map = dev->phy_map | busy_phy_map;
2419
2420 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2421
2422 dev->phy.mdio_read = emac_mdio_read;
2423 dev->phy.mdio_write = emac_mdio_write;
2424
2425 /* Enable internal clock source */
2426 #ifdef CONFIG_PPC_DCR_NATIVE
2427 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2428 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2429 #endif
2430 /* PHY clock workaround */
2431 emac_rx_clk_tx(dev);
2432
2433 /* Enable internal clock source on 440GX*/
2434 #ifdef CONFIG_PPC_DCR_NATIVE
2435 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2436 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2437 #endif
2438 /* Configure EMAC with defaults so we can at least use MDIO
2439 * This is needed mostly for 440GX
2440 */
2441 if (emac_phy_gpcs(dev->phy.mode)) {
2442 /* XXX
2443 * Make GPCS PHY address equal to EMAC index.
2444 * We probably should take into account busy_phy_map
2445 * and/or phy_map here.
2446 *
2447 * Note that the busy_phy_map is currently global
2448 * while it should probably be per-ASIC...
2449 */
2450 dev->phy.gpcs_address = dev->gpcs_address;
2451 if (dev->phy.gpcs_address == 0xffffffff)
2452 dev->phy.address = dev->cell_index;
2453 }
2454
2455 emac_configure(dev);
2456
2457 if (dev->phy_address != 0xffffffff)
2458 phy_map = ~(1 << dev->phy_address);
2459
2460 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2461 if (!(phy_map & 1)) {
2462 int r;
2463 busy_phy_map |= 1 << i;
2464
2465 /* Quick check if there is a PHY at the address */
2466 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2467 if (r == 0xffff || r < 0)
2468 continue;
2469 if (!emac_mii_phy_probe(&dev->phy, i))
2470 break;
2471 }
2472
2473 /* Enable external clock source */
2474 #ifdef CONFIG_PPC_DCR_NATIVE
2475 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2476 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2477 #endif
2478 mutex_unlock(&emac_phy_map_lock);
2479 if (i == 0x20) {
2480 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2481 return -ENXIO;
2482 }
2483
2484 /* Init PHY */
2485 if (dev->phy.def->ops->init)
2486 dev->phy.def->ops->init(&dev->phy);
2487
2488 /* Disable any PHY features not supported by the platform */
2489 dev->phy.def->features &= ~dev->phy_feat_exc;
2490 dev->phy.features &= ~dev->phy_feat_exc;
2491
2492 /* Setup initial link parameters */
2493 if (dev->phy.features & SUPPORTED_Autoneg) {
2494 adv = dev->phy.features;
2495 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2496 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2497 /* Restart autonegotiation */
2498 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2499 } else {
2500 u32 f = dev->phy.def->features;
2501 int speed = SPEED_10, fd = DUPLEX_HALF;
2502
2503 /* Select highest supported speed/duplex */
2504 if (f & SUPPORTED_1000baseT_Full) {
2505 speed = SPEED_1000;
2506 fd = DUPLEX_FULL;
2507 } else if (f & SUPPORTED_1000baseT_Half)
2508 speed = SPEED_1000;
2509 else if (f & SUPPORTED_100baseT_Full) {
2510 speed = SPEED_100;
2511 fd = DUPLEX_FULL;
2512 } else if (f & SUPPORTED_100baseT_Half)
2513 speed = SPEED_100;
2514 else if (f & SUPPORTED_10baseT_Full)
2515 fd = DUPLEX_FULL;
2516
2517 /* Force link parameters */
2518 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2519 }
2520 return 0;
2521 }
2522
2523 static int emac_init_config(struct emac_instance *dev)
2524 {
2525 struct device_node *np = dev->ofdev->dev.of_node;
2526 const void *p;
2527
2528 /* Read config from device-tree */
2529 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2530 return -ENXIO;
2531 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2532 return -ENXIO;
2533 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2534 return -ENXIO;
2535 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2536 return -ENXIO;
2537 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2538 dev->max_mtu = 1500;
2539 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2540 dev->rx_fifo_size = 2048;
2541 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2542 dev->tx_fifo_size = 2048;
2543 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2544 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2545 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2546 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2547 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2548 dev->phy_address = 0xffffffff;
2549 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2550 dev->phy_map = 0xffffffff;
2551 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2552 dev->gpcs_address = 0xffffffff;
2553 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2554 return -ENXIO;
2555 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2556 dev->tah_ph = 0;
2557 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2558 dev->tah_port = 0;
2559 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2560 dev->mdio_ph = 0;
2561 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2562 dev->zmii_ph = 0;
2563 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2564 dev->zmii_port = 0xffffffff;
2565 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2566 dev->rgmii_ph = 0;
2567 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2568 dev->rgmii_port = 0xffffffff;
2569 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2570 dev->fifo_entry_size = 16;
2571 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2572 dev->mal_burst_size = 256;
2573
2574 /* PHY mode needs some decoding */
2575 dev->phy_mode = of_get_phy_mode(np);
2576 if (dev->phy_mode < 0)
2577 dev->phy_mode = PHY_MODE_NA;
2578
2579 /* Check EMAC version */
2580 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2581 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2582 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2583 of_device_is_compatible(np, "ibm,emac-460gt"))
2584 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2585 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2586 of_device_is_compatible(np, "ibm,emac-405exr"))
2587 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2588 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2589 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2590 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2591 EMAC_FTR_460EX_PHY_CLK_FIX);
2592 }
2593 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2594 dev->features |= EMAC_FTR_EMAC4;
2595 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2596 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2597 } else {
2598 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2599 of_device_is_compatible(np, "ibm,emac-440gr"))
2600 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2601 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2602 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
2603 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2604 #else
2605 printk(KERN_ERR "%s: Flow control not disabled!\n",
2606 np->full_name);
2607 return -ENXIO;
2608 #endif
2609 }
2610
2611 }
2612
2613 /* Fixup some feature bits based on the device tree */
2614 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2615 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2616 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2617 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2618
2619 /* CAB lacks the appropriate properties */
2620 if (of_device_is_compatible(np, "ibm,emac-axon"))
2621 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2622 EMAC_FTR_STACR_OC_INVERT;
2623
2624 /* Enable TAH/ZMII/RGMII features as found */
2625 if (dev->tah_ph != 0) {
2626 #ifdef CONFIG_IBM_EMAC_TAH
2627 dev->features |= EMAC_FTR_HAS_TAH;
2628 #else
2629 printk(KERN_ERR "%s: TAH support not enabled !\n",
2630 np->full_name);
2631 return -ENXIO;
2632 #endif
2633 }
2634
2635 if (dev->zmii_ph != 0) {
2636 #ifdef CONFIG_IBM_EMAC_ZMII
2637 dev->features |= EMAC_FTR_HAS_ZMII;
2638 #else
2639 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2640 np->full_name);
2641 return -ENXIO;
2642 #endif
2643 }
2644
2645 if (dev->rgmii_ph != 0) {
2646 #ifdef CONFIG_IBM_EMAC_RGMII
2647 dev->features |= EMAC_FTR_HAS_RGMII;
2648 #else
2649 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2650 np->full_name);
2651 return -ENXIO;
2652 #endif
2653 }
2654
2655 /* Read MAC-address */
2656 p = of_get_property(np, "local-mac-address", NULL);
2657 if (p == NULL) {
2658 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2659 np->full_name);
2660 return -ENXIO;
2661 }
2662 memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
2663
2664 /* IAHT and GAHT filter parameterization */
2665 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2666 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2667 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2668 } else {
2669 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2670 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2671 }
2672
2673 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2674 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2675 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2676 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2677 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2678
2679 return 0;
2680 }
2681
2682 static const struct net_device_ops emac_netdev_ops = {
2683 .ndo_open = emac_open,
2684 .ndo_stop = emac_close,
2685 .ndo_get_stats = emac_stats,
2686 .ndo_set_rx_mode = emac_set_multicast_list,
2687 .ndo_do_ioctl = emac_ioctl,
2688 .ndo_tx_timeout = emac_tx_timeout,
2689 .ndo_validate_addr = eth_validate_addr,
2690 .ndo_set_mac_address = eth_mac_addr,
2691 .ndo_start_xmit = emac_start_xmit,
2692 .ndo_change_mtu = eth_change_mtu,
2693 };
2694
2695 static const struct net_device_ops emac_gige_netdev_ops = {
2696 .ndo_open = emac_open,
2697 .ndo_stop = emac_close,
2698 .ndo_get_stats = emac_stats,
2699 .ndo_set_rx_mode = emac_set_multicast_list,
2700 .ndo_do_ioctl = emac_ioctl,
2701 .ndo_tx_timeout = emac_tx_timeout,
2702 .ndo_validate_addr = eth_validate_addr,
2703 .ndo_set_mac_address = eth_mac_addr,
2704 .ndo_start_xmit = emac_start_xmit_sg,
2705 .ndo_change_mtu = emac_change_mtu,
2706 };
2707
2708 static int emac_probe(struct platform_device *ofdev)
2709 {
2710 struct net_device *ndev;
2711 struct emac_instance *dev;
2712 struct device_node *np = ofdev->dev.of_node;
2713 struct device_node **blist = NULL;
2714 int err, i;
2715
2716 /* Skip unused/unwired EMACS. We leave the check for an unused
2717 * property here for now, but new flat device trees should set a
2718 * status property to "disabled" instead.
2719 */
2720 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2721 return -ENODEV;
2722
2723 /* Find ourselves in the bootlist if we are there */
2724 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2725 if (emac_boot_list[i] == np)
2726 blist = &emac_boot_list[i];
2727
2728 /* Allocate our net_device structure */
2729 err = -ENOMEM;
2730 ndev = alloc_etherdev(sizeof(struct emac_instance));
2731 if (!ndev)
2732 goto err_gone;
2733
2734 dev = netdev_priv(ndev);
2735 dev->ndev = ndev;
2736 dev->ofdev = ofdev;
2737 dev->blist = blist;
2738 SET_NETDEV_DEV(ndev, &ofdev->dev);
2739
2740 /* Initialize some embedded data structures */
2741 mutex_init(&dev->mdio_lock);
2742 mutex_init(&dev->link_lock);
2743 spin_lock_init(&dev->lock);
2744 INIT_WORK(&dev->reset_work, emac_reset_work);
2745
2746 /* Init various config data based on device-tree */
2747 err = emac_init_config(dev);
2748 if (err != 0)
2749 goto err_free;
2750
2751 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2752 dev->emac_irq = irq_of_parse_and_map(np, 0);
2753 dev->wol_irq = irq_of_parse_and_map(np, 1);
2754 if (dev->emac_irq == NO_IRQ) {
2755 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2756 goto err_free;
2757 }
2758 ndev->irq = dev->emac_irq;
2759
2760 /* Map EMAC regs */
2761 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2762 printk(KERN_ERR "%s: Can't get registers address\n",
2763 np->full_name);
2764 goto err_irq_unmap;
2765 }
2766 // TODO : request_mem_region
2767 dev->emacp = ioremap(dev->rsrc_regs.start,
2768 resource_size(&dev->rsrc_regs));
2769 if (dev->emacp == NULL) {
2770 printk(KERN_ERR "%s: Can't map device registers!\n",
2771 np->full_name);
2772 err = -ENOMEM;
2773 goto err_irq_unmap;
2774 }
2775
2776 /* Wait for dependent devices */
2777 err = emac_wait_deps(dev);
2778 if (err) {
2779 printk(KERN_ERR
2780 "%s: Timeout waiting for dependent devices\n",
2781 np->full_name);
2782 /* display more info about what's missing ? */
2783 goto err_reg_unmap;
2784 }
2785 dev->mal = platform_get_drvdata(dev->mal_dev);
2786 if (dev->mdio_dev != NULL)
2787 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
2788
2789 /* Register with MAL */
2790 dev->commac.ops = &emac_commac_ops;
2791 dev->commac.dev = dev;
2792 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2793 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2794 err = mal_register_commac(dev->mal, &dev->commac);
2795 if (err) {
2796 printk(KERN_ERR "%s: failed to register with mal %s!\n",
2797 np->full_name, dev->mal_dev->dev.of_node->full_name);
2798 goto err_rel_deps;
2799 }
2800 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2801 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2802
2803 /* Get pointers to BD rings */
2804 dev->tx_desc =
2805 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2806 dev->rx_desc =
2807 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2808
2809 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2810 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2811
2812 /* Clean rings */
2813 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2814 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
2815 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2816 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
2817
2818 /* Attach to ZMII, if needed */
2819 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2820 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2821 goto err_unreg_commac;
2822
2823 /* Attach to RGMII, if needed */
2824 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2825 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2826 goto err_detach_zmii;
2827
2828 /* Attach to TAH, if needed */
2829 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2830 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2831 goto err_detach_rgmii;
2832
2833 /* Set some link defaults before we can find out real parameters */
2834 dev->phy.speed = SPEED_100;
2835 dev->phy.duplex = DUPLEX_FULL;
2836 dev->phy.autoneg = AUTONEG_DISABLE;
2837 dev->phy.pause = dev->phy.asym_pause = 0;
2838 dev->stop_timeout = STOP_TIMEOUT_100;
2839 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2840
2841 /* Some SoCs like APM821xx does not support Half Duplex mode. */
2842 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
2843 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
2844 SUPPORTED_100baseT_Half |
2845 SUPPORTED_10baseT_Half);
2846 }
2847
2848 /* Find PHY if any */
2849 err = emac_init_phy(dev);
2850 if (err != 0)
2851 goto err_detach_tah;
2852
2853 if (dev->tah_dev) {
2854 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
2855 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
2856 }
2857 ndev->watchdog_timeo = 5 * HZ;
2858 if (emac_phy_supports_gige(dev->phy_mode)) {
2859 ndev->netdev_ops = &emac_gige_netdev_ops;
2860 dev->commac.ops = &emac_commac_sg_ops;
2861 } else
2862 ndev->netdev_ops = &emac_netdev_ops;
2863 ndev->ethtool_ops = &emac_ethtool_ops;
2864
2865 netif_carrier_off(ndev);
2866
2867 err = register_netdev(ndev);
2868 if (err) {
2869 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2870 np->full_name, err);
2871 goto err_detach_tah;
2872 }
2873
2874 /* Set our drvdata last as we don't want them visible until we are
2875 * fully initialized
2876 */
2877 wmb();
2878 platform_set_drvdata(ofdev, dev);
2879
2880 /* There's a new kid in town ! Let's tell everybody */
2881 wake_up_all(&emac_probe_wait);
2882
2883
2884 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
2885 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
2886
2887 if (dev->phy_mode == PHY_MODE_SGMII)
2888 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2889
2890 if (dev->phy.address >= 0)
2891 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2892 dev->phy.def->name, dev->phy.address);
2893
2894 emac_dbg_register(dev);
2895
2896 /* Life is good */
2897 return 0;
2898
2899 /* I have a bad feeling about this ... */
2900
2901 err_detach_tah:
2902 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2903 tah_detach(dev->tah_dev, dev->tah_port);
2904 err_detach_rgmii:
2905 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2906 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2907 err_detach_zmii:
2908 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2909 zmii_detach(dev->zmii_dev, dev->zmii_port);
2910 err_unreg_commac:
2911 mal_unregister_commac(dev->mal, &dev->commac);
2912 err_rel_deps:
2913 emac_put_deps(dev);
2914 err_reg_unmap:
2915 iounmap(dev->emacp);
2916 err_irq_unmap:
2917 if (dev->wol_irq != NO_IRQ)
2918 irq_dispose_mapping(dev->wol_irq);
2919 if (dev->emac_irq != NO_IRQ)
2920 irq_dispose_mapping(dev->emac_irq);
2921 err_free:
2922 free_netdev(ndev);
2923 err_gone:
2924 /* if we were on the bootlist, remove us as we won't show up and
2925 * wake up all waiters to notify them in case they were waiting
2926 * on us
2927 */
2928 if (blist) {
2929 *blist = NULL;
2930 wake_up_all(&emac_probe_wait);
2931 }
2932 return err;
2933 }
2934
2935 static int emac_remove(struct platform_device *ofdev)
2936 {
2937 struct emac_instance *dev = platform_get_drvdata(ofdev);
2938
2939 DBG(dev, "remove" NL);
2940
2941 unregister_netdev(dev->ndev);
2942
2943 cancel_work_sync(&dev->reset_work);
2944
2945 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2946 tah_detach(dev->tah_dev, dev->tah_port);
2947 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2948 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2949 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2950 zmii_detach(dev->zmii_dev, dev->zmii_port);
2951
2952 busy_phy_map &= ~(1 << dev->phy.address);
2953 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
2954
2955 mal_unregister_commac(dev->mal, &dev->commac);
2956 emac_put_deps(dev);
2957
2958 emac_dbg_unregister(dev);
2959 iounmap(dev->emacp);
2960
2961 if (dev->wol_irq != NO_IRQ)
2962 irq_dispose_mapping(dev->wol_irq);
2963 if (dev->emac_irq != NO_IRQ)
2964 irq_dispose_mapping(dev->emac_irq);
2965
2966 free_netdev(dev->ndev);
2967
2968 return 0;
2969 }
2970
2971 /* XXX Features in here should be replaced by properties... */
2972 static const struct of_device_id emac_match[] =
2973 {
2974 {
2975 .type = "network",
2976 .compatible = "ibm,emac",
2977 },
2978 {
2979 .type = "network",
2980 .compatible = "ibm,emac4",
2981 },
2982 {
2983 .type = "network",
2984 .compatible = "ibm,emac4sync",
2985 },
2986 {},
2987 };
2988 MODULE_DEVICE_TABLE(of, emac_match);
2989
2990 static struct platform_driver emac_driver = {
2991 .driver = {
2992 .name = "emac",
2993 .of_match_table = emac_match,
2994 },
2995 .probe = emac_probe,
2996 .remove = emac_remove,
2997 };
2998
2999 static void __init emac_make_bootlist(void)
3000 {
3001 struct device_node *np = NULL;
3002 int j, max, i = 0, k;
3003 int cell_indices[EMAC_BOOT_LIST_SIZE];
3004
3005 /* Collect EMACs */
3006 while((np = of_find_all_nodes(np)) != NULL) {
3007 const u32 *idx;
3008
3009 if (of_match_node(emac_match, np) == NULL)
3010 continue;
3011 if (of_get_property(np, "unused", NULL))
3012 continue;
3013 idx = of_get_property(np, "cell-index", NULL);
3014 if (idx == NULL)
3015 continue;
3016 cell_indices[i] = *idx;
3017 emac_boot_list[i++] = of_node_get(np);
3018 if (i >= EMAC_BOOT_LIST_SIZE) {
3019 of_node_put(np);
3020 break;
3021 }
3022 }
3023 max = i;
3024
3025 /* Bubble sort them (doh, what a creative algorithm :-) */
3026 for (i = 0; max > 1 && (i < (max - 1)); i++)
3027 for (j = i; j < max; j++) {
3028 if (cell_indices[i] > cell_indices[j]) {
3029 np = emac_boot_list[i];
3030 emac_boot_list[i] = emac_boot_list[j];
3031 emac_boot_list[j] = np;
3032 k = cell_indices[i];
3033 cell_indices[i] = cell_indices[j];
3034 cell_indices[j] = k;
3035 }
3036 }
3037 }
3038
3039 static int __init emac_init(void)
3040 {
3041 int rc;
3042
3043 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3044
3045 /* Init debug stuff */
3046 emac_init_debug();
3047
3048 /* Build EMAC boot list */
3049 emac_make_bootlist();
3050
3051 /* Init submodules */
3052 rc = mal_init();
3053 if (rc)
3054 goto err;
3055 rc = zmii_init();
3056 if (rc)
3057 goto err_mal;
3058 rc = rgmii_init();
3059 if (rc)
3060 goto err_zmii;
3061 rc = tah_init();
3062 if (rc)
3063 goto err_rgmii;
3064 rc = platform_driver_register(&emac_driver);
3065 if (rc)
3066 goto err_tah;
3067
3068 return 0;
3069
3070 err_tah:
3071 tah_exit();
3072 err_rgmii:
3073 rgmii_exit();
3074 err_zmii:
3075 zmii_exit();
3076 err_mal:
3077 mal_exit();
3078 err:
3079 return rc;
3080 }
3081
3082 static void __exit emac_exit(void)
3083 {
3084 int i;
3085
3086 platform_driver_unregister(&emac_driver);
3087
3088 tah_exit();
3089 rgmii_exit();
3090 zmii_exit();
3091 mal_exit();
3092 emac_fini_debug();
3093
3094 /* Destroy EMAC boot list */
3095 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3096 of_node_put(emac_boot_list[i]);
3097 }
3098
3099 module_init(emac_init);
3100 module_exit(emac_exit);
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