]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/net/ethernet/ibm/emac/core.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
spi-imx: Implements handling of the SPI_READY mode flag.
[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/of_mdio.h>
46 #include <linux/slab.h>
47
48 #include <asm/processor.h>
49 #include <asm/io.h>
50 #include <asm/dma.h>
51 #include <linux/uaccess.h>
52 #include <asm/dcr.h>
53 #include <asm/dcr-regs.h>
54
55 #include "core.h"
56
57 /*
58 * Lack of dma_unmap_???? calls is intentional.
59 *
60 * API-correct usage requires additional support state information to be
61 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
62 * EMAC design (e.g. TX buffer passed from network stack can be split into
63 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
64 * maintaining such information will add additional overhead.
65 * Current DMA API implementation for 4xx processors only ensures cache coherency
66 * and dma_unmap_???? routines are empty and are likely to stay this way.
67 * I decided to omit dma_unmap_??? calls because I don't want to add additional
68 * complexity just for the sake of following some abstract API, when it doesn't
69 * add any real benefit to the driver. I understand that this decision maybe
70 * controversial, but I really tried to make code API-correct and efficient
71 * at the same time and didn't come up with code I liked :(. --ebs
72 */
73
74 #define DRV_NAME "emac"
75 #define DRV_VERSION "3.54"
76 #define DRV_DESC "PPC 4xx OCP EMAC driver"
77
78 MODULE_DESCRIPTION(DRV_DESC);
79 MODULE_AUTHOR
80 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
81 MODULE_LICENSE("GPL");
82
83 /* minimum number of free TX descriptors required to wake up TX process */
84 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
85
86 /* If packet size is less than this number, we allocate small skb and copy packet
87 * contents into it instead of just sending original big skb up
88 */
89 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
90
91 /* Since multiple EMACs share MDIO lines in various ways, we need
92 * to avoid re-using the same PHY ID in cases where the arch didn't
93 * setup precise phy_map entries
94 *
95 * XXX This is something that needs to be reworked as we can have multiple
96 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
97 * probably require in that case to have explicit PHY IDs in the device-tree
98 */
99 static u32 busy_phy_map;
100 static DEFINE_MUTEX(emac_phy_map_lock);
101
102 /* This is the wait queue used to wait on any event related to probe, that
103 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
104 */
105 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
106
107 /* Having stable interface names is a doomed idea. However, it would be nice
108 * if we didn't have completely random interface names at boot too :-) It's
109 * just a matter of making everybody's life easier. Since we are doing
110 * threaded probing, it's a bit harder though. The base idea here is that
111 * we make up a list of all emacs in the device-tree before we register the
112 * driver. Every emac will then wait for the previous one in the list to
113 * initialize before itself. We should also keep that list ordered by
114 * cell_index.
115 * That list is only 4 entries long, meaning that additional EMACs don't
116 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
117 */
118
119 #define EMAC_BOOT_LIST_SIZE 4
120 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
121
122 /* How long should I wait for dependent devices ? */
123 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
124
125 /* I don't want to litter system log with timeout errors
126 * when we have brain-damaged PHY.
127 */
128 static inline void emac_report_timeout_error(struct emac_instance *dev,
129 const char *error)
130 {
131 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
132 EMAC_FTR_460EX_PHY_CLK_FIX |
133 EMAC_FTR_440EP_PHY_CLK_FIX))
134 DBG(dev, "%s" NL, error);
135 else if (net_ratelimit())
136 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
137 error);
138 }
139
140 /* EMAC PHY clock workaround:
141 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
142 * which allows controlling each EMAC clock
143 */
144 static inline void emac_rx_clk_tx(struct emac_instance *dev)
145 {
146 #ifdef CONFIG_PPC_DCR_NATIVE
147 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
148 dcri_clrset(SDR0, SDR0_MFR,
149 0, SDR0_MFR_ECS >> dev->cell_index);
150 #endif
151 }
152
153 static inline void emac_rx_clk_default(struct emac_instance *dev)
154 {
155 #ifdef CONFIG_PPC_DCR_NATIVE
156 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
157 dcri_clrset(SDR0, SDR0_MFR,
158 SDR0_MFR_ECS >> dev->cell_index, 0);
159 #endif
160 }
161
162 /* PHY polling intervals */
163 #define PHY_POLL_LINK_ON HZ
164 #define PHY_POLL_LINK_OFF (HZ / 5)
165
166 /* Graceful stop timeouts in us.
167 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
168 */
169 #define STOP_TIMEOUT_10 1230
170 #define STOP_TIMEOUT_100 124
171 #define STOP_TIMEOUT_1000 13
172 #define STOP_TIMEOUT_1000_JUMBO 73
173
174 static unsigned char default_mcast_addr[] = {
175 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
176 };
177
178 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
179 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
180 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
181 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
182 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
183 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
184 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
185 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
186 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
187 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
188 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
189 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
190 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
191 "tx_bd_excessive_collisions", "tx_bd_late_collision",
192 "tx_bd_multple_collisions", "tx_bd_single_collision",
193 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
194 "tx_errors"
195 };
196
197 static irqreturn_t emac_irq(int irq, void *dev_instance);
198 static void emac_clean_tx_ring(struct emac_instance *dev);
199 static void __emac_set_multicast_list(struct emac_instance *dev);
200
201 static inline int emac_phy_supports_gige(int phy_mode)
202 {
203 return phy_mode == PHY_MODE_GMII ||
204 phy_mode == PHY_MODE_RGMII ||
205 phy_mode == PHY_MODE_SGMII ||
206 phy_mode == PHY_MODE_TBI ||
207 phy_mode == PHY_MODE_RTBI;
208 }
209
210 static inline int emac_phy_gpcs(int phy_mode)
211 {
212 return phy_mode == PHY_MODE_SGMII ||
213 phy_mode == PHY_MODE_TBI ||
214 phy_mode == PHY_MODE_RTBI;
215 }
216
217 static inline void emac_tx_enable(struct emac_instance *dev)
218 {
219 struct emac_regs __iomem *p = dev->emacp;
220 u32 r;
221
222 DBG(dev, "tx_enable" NL);
223
224 r = in_be32(&p->mr0);
225 if (!(r & EMAC_MR0_TXE))
226 out_be32(&p->mr0, r | EMAC_MR0_TXE);
227 }
228
229 static void emac_tx_disable(struct emac_instance *dev)
230 {
231 struct emac_regs __iomem *p = dev->emacp;
232 u32 r;
233
234 DBG(dev, "tx_disable" NL);
235
236 r = in_be32(&p->mr0);
237 if (r & EMAC_MR0_TXE) {
238 int n = dev->stop_timeout;
239 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
240 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
241 udelay(1);
242 --n;
243 }
244 if (unlikely(!n))
245 emac_report_timeout_error(dev, "TX disable timeout");
246 }
247 }
248
249 static void emac_rx_enable(struct emac_instance *dev)
250 {
251 struct emac_regs __iomem *p = dev->emacp;
252 u32 r;
253
254 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
255 goto out;
256
257 DBG(dev, "rx_enable" NL);
258
259 r = in_be32(&p->mr0);
260 if (!(r & EMAC_MR0_RXE)) {
261 if (unlikely(!(r & EMAC_MR0_RXI))) {
262 /* Wait if previous async disable is still in progress */
263 int n = dev->stop_timeout;
264 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
265 udelay(1);
266 --n;
267 }
268 if (unlikely(!n))
269 emac_report_timeout_error(dev,
270 "RX disable timeout");
271 }
272 out_be32(&p->mr0, r | EMAC_MR0_RXE);
273 }
274 out:
275 ;
276 }
277
278 static void emac_rx_disable(struct emac_instance *dev)
279 {
280 struct emac_regs __iomem *p = dev->emacp;
281 u32 r;
282
283 DBG(dev, "rx_disable" NL);
284
285 r = in_be32(&p->mr0);
286 if (r & EMAC_MR0_RXE) {
287 int n = dev->stop_timeout;
288 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
289 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
290 udelay(1);
291 --n;
292 }
293 if (unlikely(!n))
294 emac_report_timeout_error(dev, "RX disable timeout");
295 }
296 }
297
298 static inline void emac_netif_stop(struct emac_instance *dev)
299 {
300 netif_tx_lock_bh(dev->ndev);
301 netif_addr_lock(dev->ndev);
302 dev->no_mcast = 1;
303 netif_addr_unlock(dev->ndev);
304 netif_tx_unlock_bh(dev->ndev);
305 netif_trans_update(dev->ndev); /* prevent tx timeout */
306 mal_poll_disable(dev->mal, &dev->commac);
307 netif_tx_disable(dev->ndev);
308 }
309
310 static inline void emac_netif_start(struct emac_instance *dev)
311 {
312 netif_tx_lock_bh(dev->ndev);
313 netif_addr_lock(dev->ndev);
314 dev->no_mcast = 0;
315 if (dev->mcast_pending && netif_running(dev->ndev))
316 __emac_set_multicast_list(dev);
317 netif_addr_unlock(dev->ndev);
318 netif_tx_unlock_bh(dev->ndev);
319
320 netif_wake_queue(dev->ndev);
321
322 /* NOTE: unconditional netif_wake_queue is only appropriate
323 * so long as all callers are assured to have free tx slots
324 * (taken from tg3... though the case where that is wrong is
325 * not terribly harmful)
326 */
327 mal_poll_enable(dev->mal, &dev->commac);
328 }
329
330 static inline void emac_rx_disable_async(struct emac_instance *dev)
331 {
332 struct emac_regs __iomem *p = dev->emacp;
333 u32 r;
334
335 DBG(dev, "rx_disable_async" NL);
336
337 r = in_be32(&p->mr0);
338 if (r & EMAC_MR0_RXE)
339 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
340 }
341
342 static int emac_reset(struct emac_instance *dev)
343 {
344 struct emac_regs __iomem *p = dev->emacp;
345 int n = 20;
346
347 DBG(dev, "reset" NL);
348
349 if (!dev->reset_failed) {
350 /* 40x erratum suggests stopping RX channel before reset,
351 * we stop TX as well
352 */
353 emac_rx_disable(dev);
354 emac_tx_disable(dev);
355 }
356
357 #ifdef CONFIG_PPC_DCR_NATIVE
358 /*
359 * PPC460EX/GT Embedded Processor Advanced User's Manual
360 * section 28.10.1 Mode Register 0 (EMACx_MR0) states:
361 * Note: The PHY must provide a TX Clk in order to perform a soft reset
362 * of the EMAC. If none is present, select the internal clock
363 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1).
364 * After a soft reset, select the external clock.
365 */
366 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
367 if (dev->phy_address == 0xffffffff &&
368 dev->phy_map == 0xffffffff) {
369 /* No PHY: select internal loop clock before reset */
370 dcri_clrset(SDR0, SDR0_ETH_CFG,
371 0, SDR0_ETH_CFG_ECS << dev->cell_index);
372 } else {
373 /* PHY present: select external clock before reset */
374 dcri_clrset(SDR0, SDR0_ETH_CFG,
375 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
376 }
377 }
378 #endif
379
380 out_be32(&p->mr0, EMAC_MR0_SRST);
381 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
382 --n;
383
384 #ifdef CONFIG_PPC_DCR_NATIVE
385 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
386 if (dev->phy_address == 0xffffffff &&
387 dev->phy_map == 0xffffffff) {
388 /* No PHY: restore external clock source after reset */
389 dcri_clrset(SDR0, SDR0_ETH_CFG,
390 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
391 }
392 }
393 #endif
394
395 if (n) {
396 dev->reset_failed = 0;
397 return 0;
398 } else {
399 emac_report_timeout_error(dev, "reset timeout");
400 dev->reset_failed = 1;
401 return -ETIMEDOUT;
402 }
403 }
404
405 static void emac_hash_mc(struct emac_instance *dev)
406 {
407 const int regs = EMAC_XAHT_REGS(dev);
408 u32 *gaht_base = emac_gaht_base(dev);
409 u32 gaht_temp[regs];
410 struct netdev_hw_addr *ha;
411 int i;
412
413 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
414
415 memset(gaht_temp, 0, sizeof (gaht_temp));
416
417 netdev_for_each_mc_addr(ha, dev->ndev) {
418 int slot, reg, mask;
419 DBG2(dev, "mc %pM" NL, ha->addr);
420
421 slot = EMAC_XAHT_CRC_TO_SLOT(dev,
422 ether_crc(ETH_ALEN, ha->addr));
423 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
424 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
425
426 gaht_temp[reg] |= mask;
427 }
428
429 for (i = 0; i < regs; i++)
430 out_be32(gaht_base + i, gaht_temp[i]);
431 }
432
433 static inline u32 emac_iff2rmr(struct net_device *ndev)
434 {
435 struct emac_instance *dev = netdev_priv(ndev);
436 u32 r;
437
438 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
439
440 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
441 r |= EMAC4_RMR_BASE;
442 else
443 r |= EMAC_RMR_BASE;
444
445 if (ndev->flags & IFF_PROMISC)
446 r |= EMAC_RMR_PME;
447 else if (ndev->flags & IFF_ALLMULTI ||
448 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
449 r |= EMAC_RMR_PMME;
450 else if (!netdev_mc_empty(ndev))
451 r |= EMAC_RMR_MAE;
452
453 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
454 r &= ~EMAC4_RMR_MJS_MASK;
455 r |= EMAC4_RMR_MJS(ndev->mtu);
456 }
457
458 return r;
459 }
460
461 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
462 {
463 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
464
465 DBG2(dev, "__emac_calc_base_mr1" NL);
466
467 switch(tx_size) {
468 case 2048:
469 ret |= EMAC_MR1_TFS_2K;
470 break;
471 default:
472 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
473 dev->ndev->name, tx_size);
474 }
475
476 switch(rx_size) {
477 case 16384:
478 ret |= EMAC_MR1_RFS_16K;
479 break;
480 case 4096:
481 ret |= EMAC_MR1_RFS_4K;
482 break;
483 default:
484 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
485 dev->ndev->name, rx_size);
486 }
487
488 return ret;
489 }
490
491 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
492 {
493 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
494 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
495
496 DBG2(dev, "__emac4_calc_base_mr1" NL);
497
498 switch(tx_size) {
499 case 16384:
500 ret |= EMAC4_MR1_TFS_16K;
501 break;
502 case 4096:
503 ret |= EMAC4_MR1_TFS_4K;
504 break;
505 case 2048:
506 ret |= EMAC4_MR1_TFS_2K;
507 break;
508 default:
509 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
510 dev->ndev->name, tx_size);
511 }
512
513 switch(rx_size) {
514 case 16384:
515 ret |= EMAC4_MR1_RFS_16K;
516 break;
517 case 4096:
518 ret |= EMAC4_MR1_RFS_4K;
519 break;
520 case 2048:
521 ret |= EMAC4_MR1_RFS_2K;
522 break;
523 default:
524 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
525 dev->ndev->name, rx_size);
526 }
527
528 return ret;
529 }
530
531 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
532 {
533 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
534 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
535 __emac_calc_base_mr1(dev, tx_size, rx_size);
536 }
537
538 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
539 {
540 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
541 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
542 else
543 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
544 }
545
546 static inline u32 emac_calc_rwmr(struct emac_instance *dev,
547 unsigned int low, unsigned int high)
548 {
549 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
550 return (low << 22) | ( (high & 0x3ff) << 6);
551 else
552 return (low << 23) | ( (high & 0x1ff) << 7);
553 }
554
555 static int emac_configure(struct emac_instance *dev)
556 {
557 struct emac_regs __iomem *p = dev->emacp;
558 struct net_device *ndev = dev->ndev;
559 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
560 u32 r, mr1 = 0;
561
562 DBG(dev, "configure" NL);
563
564 if (!link) {
565 out_be32(&p->mr1, in_be32(&p->mr1)
566 | EMAC_MR1_FDE | EMAC_MR1_ILE);
567 udelay(100);
568 } else if (emac_reset(dev) < 0)
569 return -ETIMEDOUT;
570
571 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
572 tah_reset(dev->tah_dev);
573
574 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
575 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
576
577 /* Default fifo sizes */
578 tx_size = dev->tx_fifo_size;
579 rx_size = dev->rx_fifo_size;
580
581 /* No link, force loopback */
582 if (!link)
583 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
584
585 /* Check for full duplex */
586 else if (dev->phy.duplex == DUPLEX_FULL)
587 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
588
589 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
590 dev->stop_timeout = STOP_TIMEOUT_10;
591 switch (dev->phy.speed) {
592 case SPEED_1000:
593 if (emac_phy_gpcs(dev->phy.mode)) {
594 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
595 (dev->phy.gpcs_address != 0xffffffff) ?
596 dev->phy.gpcs_address : dev->phy.address);
597
598 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
599 * identify this GPCS PHY later.
600 */
601 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
602 } else
603 mr1 |= EMAC_MR1_MF_1000;
604
605 /* Extended fifo sizes */
606 tx_size = dev->tx_fifo_size_gige;
607 rx_size = dev->rx_fifo_size_gige;
608
609 if (dev->ndev->mtu > ETH_DATA_LEN) {
610 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
611 mr1 |= EMAC4_MR1_JPSM;
612 else
613 mr1 |= EMAC_MR1_JPSM;
614 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
615 } else
616 dev->stop_timeout = STOP_TIMEOUT_1000;
617 break;
618 case SPEED_100:
619 mr1 |= EMAC_MR1_MF_100;
620 dev->stop_timeout = STOP_TIMEOUT_100;
621 break;
622 default: /* make gcc happy */
623 break;
624 }
625
626 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
627 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
628 dev->phy.speed);
629 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
630 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
631
632 /* on 40x erratum forces us to NOT use integrated flow control,
633 * let's hope it works on 44x ;)
634 */
635 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
636 dev->phy.duplex == DUPLEX_FULL) {
637 if (dev->phy.pause)
638 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
639 else if (dev->phy.asym_pause)
640 mr1 |= EMAC_MR1_APP;
641 }
642
643 /* Add base settings & fifo sizes & program MR1 */
644 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
645 out_be32(&p->mr1, mr1);
646
647 /* Set individual MAC address */
648 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
649 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
650 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
651 ndev->dev_addr[5]);
652
653 /* VLAN Tag Protocol ID */
654 out_be32(&p->vtpid, 0x8100);
655
656 /* Receive mode register */
657 r = emac_iff2rmr(ndev);
658 if (r & EMAC_RMR_MAE)
659 emac_hash_mc(dev);
660 out_be32(&p->rmr, r);
661
662 /* FIFOs thresholds */
663 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
664 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
665 tx_size / 2 / dev->fifo_entry_size);
666 else
667 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
668 tx_size / 2 / dev->fifo_entry_size);
669 out_be32(&p->tmr1, r);
670 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
671
672 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
673 there should be still enough space in FIFO to allow the our link
674 partner time to process this frame and also time to send PAUSE
675 frame itself.
676
677 Here is the worst case scenario for the RX FIFO "headroom"
678 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
679
680 1) One maximum-length frame on TX 1522 bytes
681 2) One PAUSE frame time 64 bytes
682 3) PAUSE frame decode time allowance 64 bytes
683 4) One maximum-length frame on RX 1522 bytes
684 5) Round-trip propagation delay of the link (100Mb) 15 bytes
685 ----------
686 3187 bytes
687
688 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
689 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
690 */
691 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
692 rx_size / 4 / dev->fifo_entry_size);
693 out_be32(&p->rwmr, r);
694
695 /* Set PAUSE timer to the maximum */
696 out_be32(&p->ptr, 0xffff);
697
698 /* IRQ sources */
699 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
700 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
701 EMAC_ISR_IRE | EMAC_ISR_TE;
702 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
703 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
704 EMAC4_ISR_RXOE | */;
705 out_be32(&p->iser, r);
706
707 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
708 if (emac_phy_gpcs(dev->phy.mode)) {
709 if (dev->phy.gpcs_address != 0xffffffff)
710 emac_mii_reset_gpcs(&dev->phy);
711 else
712 emac_mii_reset_phy(&dev->phy);
713 }
714
715 return 0;
716 }
717
718 static void emac_reinitialize(struct emac_instance *dev)
719 {
720 DBG(dev, "reinitialize" NL);
721
722 emac_netif_stop(dev);
723 if (!emac_configure(dev)) {
724 emac_tx_enable(dev);
725 emac_rx_enable(dev);
726 }
727 emac_netif_start(dev);
728 }
729
730 static void emac_full_tx_reset(struct emac_instance *dev)
731 {
732 DBG(dev, "full_tx_reset" NL);
733
734 emac_tx_disable(dev);
735 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
736 emac_clean_tx_ring(dev);
737 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
738
739 emac_configure(dev);
740
741 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
742 emac_tx_enable(dev);
743 emac_rx_enable(dev);
744 }
745
746 static void emac_reset_work(struct work_struct *work)
747 {
748 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
749
750 DBG(dev, "reset_work" NL);
751
752 mutex_lock(&dev->link_lock);
753 if (dev->opened) {
754 emac_netif_stop(dev);
755 emac_full_tx_reset(dev);
756 emac_netif_start(dev);
757 }
758 mutex_unlock(&dev->link_lock);
759 }
760
761 static void emac_tx_timeout(struct net_device *ndev)
762 {
763 struct emac_instance *dev = netdev_priv(ndev);
764
765 DBG(dev, "tx_timeout" NL);
766
767 schedule_work(&dev->reset_work);
768 }
769
770
771 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
772 {
773 int done = !!(stacr & EMAC_STACR_OC);
774
775 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
776 done = !done;
777
778 return done;
779 };
780
781 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
782 {
783 struct emac_regs __iomem *p = dev->emacp;
784 u32 r = 0;
785 int n, err = -ETIMEDOUT;
786
787 mutex_lock(&dev->mdio_lock);
788
789 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
790
791 /* Enable proper MDIO port */
792 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
793 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
794 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
795 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
796
797 /* Wait for management interface to become idle */
798 n = 20;
799 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
800 udelay(1);
801 if (!--n) {
802 DBG2(dev, " -> timeout wait idle\n");
803 goto bail;
804 }
805 }
806
807 /* Issue read command */
808 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
809 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
810 else
811 r = EMAC_STACR_BASE(dev->opb_bus_freq);
812 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
813 r |= EMAC_STACR_OC;
814 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
815 r |= EMACX_STACR_STAC_READ;
816 else
817 r |= EMAC_STACR_STAC_READ;
818 r |= (reg & EMAC_STACR_PRA_MASK)
819 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
820 out_be32(&p->stacr, r);
821
822 /* Wait for read to complete */
823 n = 200;
824 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
825 udelay(1);
826 if (!--n) {
827 DBG2(dev, " -> timeout wait complete\n");
828 goto bail;
829 }
830 }
831
832 if (unlikely(r & EMAC_STACR_PHYE)) {
833 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
834 err = -EREMOTEIO;
835 goto bail;
836 }
837
838 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
839
840 DBG2(dev, "mdio_read -> %04x" NL, r);
841 err = 0;
842 bail:
843 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
844 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
845 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
846 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
847 mutex_unlock(&dev->mdio_lock);
848
849 return err == 0 ? r : err;
850 }
851
852 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
853 u16 val)
854 {
855 struct emac_regs __iomem *p = dev->emacp;
856 u32 r = 0;
857 int n, err = -ETIMEDOUT;
858
859 mutex_lock(&dev->mdio_lock);
860
861 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
862
863 /* Enable proper MDIO port */
864 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
865 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
866 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
867 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
868
869 /* Wait for management interface to be idle */
870 n = 20;
871 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
872 udelay(1);
873 if (!--n) {
874 DBG2(dev, " -> timeout wait idle\n");
875 goto bail;
876 }
877 }
878
879 /* Issue write command */
880 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
881 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
882 else
883 r = EMAC_STACR_BASE(dev->opb_bus_freq);
884 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
885 r |= EMAC_STACR_OC;
886 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
887 r |= EMACX_STACR_STAC_WRITE;
888 else
889 r |= EMAC_STACR_STAC_WRITE;
890 r |= (reg & EMAC_STACR_PRA_MASK) |
891 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
892 (val << EMAC_STACR_PHYD_SHIFT);
893 out_be32(&p->stacr, r);
894
895 /* Wait for write to complete */
896 n = 200;
897 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
898 udelay(1);
899 if (!--n) {
900 DBG2(dev, " -> timeout wait complete\n");
901 goto bail;
902 }
903 }
904 err = 0;
905 bail:
906 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
907 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
908 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
909 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
910 mutex_unlock(&dev->mdio_lock);
911 }
912
913 static int emac_mdio_read(struct net_device *ndev, int id, int reg)
914 {
915 struct emac_instance *dev = netdev_priv(ndev);
916 int res;
917
918 res = __emac_mdio_read((dev->mdio_instance &&
919 dev->phy.gpcs_address != id) ?
920 dev->mdio_instance : dev,
921 (u8) id, (u8) reg);
922 return res;
923 }
924
925 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
926 {
927 struct emac_instance *dev = netdev_priv(ndev);
928
929 __emac_mdio_write((dev->mdio_instance &&
930 dev->phy.gpcs_address != id) ?
931 dev->mdio_instance : dev,
932 (u8) id, (u8) reg, (u16) val);
933 }
934
935 /* Tx lock BH */
936 static void __emac_set_multicast_list(struct emac_instance *dev)
937 {
938 struct emac_regs __iomem *p = dev->emacp;
939 u32 rmr = emac_iff2rmr(dev->ndev);
940
941 DBG(dev, "__multicast %08x" NL, rmr);
942
943 /* I decided to relax register access rules here to avoid
944 * full EMAC reset.
945 *
946 * There is a real problem with EMAC4 core if we use MWSW_001 bit
947 * in MR1 register and do a full EMAC reset.
948 * One TX BD status update is delayed and, after EMAC reset, it
949 * never happens, resulting in TX hung (it'll be recovered by TX
950 * timeout handler eventually, but this is just gross).
951 * So we either have to do full TX reset or try to cheat here :)
952 *
953 * The only required change is to RX mode register, so I *think* all
954 * we need is just to stop RX channel. This seems to work on all
955 * tested SoCs. --ebs
956 *
957 * If we need the full reset, we might just trigger the workqueue
958 * and do it async... a bit nasty but should work --BenH
959 */
960 dev->mcast_pending = 0;
961 emac_rx_disable(dev);
962 if (rmr & EMAC_RMR_MAE)
963 emac_hash_mc(dev);
964 out_be32(&p->rmr, rmr);
965 emac_rx_enable(dev);
966 }
967
968 /* Tx lock BH */
969 static void emac_set_multicast_list(struct net_device *ndev)
970 {
971 struct emac_instance *dev = netdev_priv(ndev);
972
973 DBG(dev, "multicast" NL);
974
975 BUG_ON(!netif_running(dev->ndev));
976
977 if (dev->no_mcast) {
978 dev->mcast_pending = 1;
979 return;
980 }
981
982 mutex_lock(&dev->link_lock);
983 __emac_set_multicast_list(dev);
984 mutex_unlock(&dev->link_lock);
985 }
986
987 static int emac_set_mac_address(struct net_device *ndev, void *sa)
988 {
989 struct emac_instance *dev = netdev_priv(ndev);
990 struct sockaddr *addr = sa;
991 struct emac_regs __iomem *p = dev->emacp;
992
993 if (!is_valid_ether_addr(addr->sa_data))
994 return -EADDRNOTAVAIL;
995
996 mutex_lock(&dev->link_lock);
997
998 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
999
1000 emac_rx_disable(dev);
1001 emac_tx_disable(dev);
1002 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
1003 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
1004 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
1005 ndev->dev_addr[5]);
1006 emac_tx_enable(dev);
1007 emac_rx_enable(dev);
1008
1009 mutex_unlock(&dev->link_lock);
1010
1011 return 0;
1012 }
1013
1014 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
1015 {
1016 int rx_sync_size = emac_rx_sync_size(new_mtu);
1017 int rx_skb_size = emac_rx_skb_size(new_mtu);
1018 int i, ret = 0;
1019 int mr1_jumbo_bit_change = 0;
1020
1021 mutex_lock(&dev->link_lock);
1022 emac_netif_stop(dev);
1023 emac_rx_disable(dev);
1024 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1025
1026 if (dev->rx_sg_skb) {
1027 ++dev->estats.rx_dropped_resize;
1028 dev_kfree_skb(dev->rx_sg_skb);
1029 dev->rx_sg_skb = NULL;
1030 }
1031
1032 /* Make a first pass over RX ring and mark BDs ready, dropping
1033 * non-processed packets on the way. We need this as a separate pass
1034 * to simplify error recovery in the case of allocation failure later.
1035 */
1036 for (i = 0; i < NUM_RX_BUFF; ++i) {
1037 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
1038 ++dev->estats.rx_dropped_resize;
1039
1040 dev->rx_desc[i].data_len = 0;
1041 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
1042 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1043 }
1044
1045 /* Reallocate RX ring only if bigger skb buffers are required */
1046 if (rx_skb_size <= dev->rx_skb_size)
1047 goto skip;
1048
1049 /* Second pass, allocate new skbs */
1050 for (i = 0; i < NUM_RX_BUFF; ++i) {
1051 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
1052 if (!skb) {
1053 ret = -ENOMEM;
1054 goto oom;
1055 }
1056
1057 BUG_ON(!dev->rx_skb[i]);
1058 dev_kfree_skb(dev->rx_skb[i]);
1059
1060 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1061 dev->rx_desc[i].data_ptr =
1062 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1063 DMA_FROM_DEVICE) + 2;
1064 dev->rx_skb[i] = skb;
1065 }
1066 skip:
1067 /* Check if we need to change "Jumbo" bit in MR1 */
1068 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
1069 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
1070 (dev->ndev->mtu > ETH_DATA_LEN);
1071 } else {
1072 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
1073 (dev->ndev->mtu > ETH_DATA_LEN);
1074 }
1075
1076 if (mr1_jumbo_bit_change) {
1077 /* This is to prevent starting RX channel in emac_rx_enable() */
1078 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1079
1080 dev->ndev->mtu = new_mtu;
1081 emac_full_tx_reset(dev);
1082 }
1083
1084 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1085 oom:
1086 /* Restart RX */
1087 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1088 dev->rx_slot = 0;
1089 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1090 emac_rx_enable(dev);
1091 emac_netif_start(dev);
1092 mutex_unlock(&dev->link_lock);
1093
1094 return ret;
1095 }
1096
1097 /* Process ctx, rtnl_lock semaphore */
1098 static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1099 {
1100 struct emac_instance *dev = netdev_priv(ndev);
1101 int ret = 0;
1102
1103 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1104
1105 if (netif_running(ndev)) {
1106 /* Check if we really need to reinitialize RX ring */
1107 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1108 ret = emac_resize_rx_ring(dev, new_mtu);
1109 }
1110
1111 if (!ret) {
1112 ndev->mtu = new_mtu;
1113 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1114 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1115 }
1116
1117 return ret;
1118 }
1119
1120 static void emac_clean_tx_ring(struct emac_instance *dev)
1121 {
1122 int i;
1123
1124 for (i = 0; i < NUM_TX_BUFF; ++i) {
1125 if (dev->tx_skb[i]) {
1126 dev_kfree_skb(dev->tx_skb[i]);
1127 dev->tx_skb[i] = NULL;
1128 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1129 ++dev->estats.tx_dropped;
1130 }
1131 dev->tx_desc[i].ctrl = 0;
1132 dev->tx_desc[i].data_ptr = 0;
1133 }
1134 }
1135
1136 static void emac_clean_rx_ring(struct emac_instance *dev)
1137 {
1138 int i;
1139
1140 for (i = 0; i < NUM_RX_BUFF; ++i)
1141 if (dev->rx_skb[i]) {
1142 dev->rx_desc[i].ctrl = 0;
1143 dev_kfree_skb(dev->rx_skb[i]);
1144 dev->rx_skb[i] = NULL;
1145 dev->rx_desc[i].data_ptr = 0;
1146 }
1147
1148 if (dev->rx_sg_skb) {
1149 dev_kfree_skb(dev->rx_sg_skb);
1150 dev->rx_sg_skb = NULL;
1151 }
1152 }
1153
1154 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1155 gfp_t flags)
1156 {
1157 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1158 if (unlikely(!skb))
1159 return -ENOMEM;
1160
1161 dev->rx_skb[slot] = skb;
1162 dev->rx_desc[slot].data_len = 0;
1163
1164 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1165 dev->rx_desc[slot].data_ptr =
1166 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1167 DMA_FROM_DEVICE) + 2;
1168 wmb();
1169 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1170 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1171
1172 return 0;
1173 }
1174
1175 static void emac_print_link_status(struct emac_instance *dev)
1176 {
1177 if (netif_carrier_ok(dev->ndev))
1178 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1179 dev->ndev->name, dev->phy.speed,
1180 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1181 dev->phy.pause ? ", pause enabled" :
1182 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1183 else
1184 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1185 }
1186
1187 /* Process ctx, rtnl_lock semaphore */
1188 static int emac_open(struct net_device *ndev)
1189 {
1190 struct emac_instance *dev = netdev_priv(ndev);
1191 int err, i;
1192
1193 DBG(dev, "open" NL);
1194
1195 /* Setup error IRQ handler */
1196 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1197 if (err) {
1198 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1199 ndev->name, dev->emac_irq);
1200 return err;
1201 }
1202
1203 /* Allocate RX ring */
1204 for (i = 0; i < NUM_RX_BUFF; ++i)
1205 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1206 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1207 ndev->name);
1208 goto oom;
1209 }
1210
1211 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1212 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1213 dev->rx_sg_skb = NULL;
1214
1215 mutex_lock(&dev->link_lock);
1216 dev->opened = 1;
1217
1218 /* Start PHY polling now.
1219 */
1220 if (dev->phy.address >= 0) {
1221 int link_poll_interval;
1222 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1223 dev->phy.def->ops->read_link(&dev->phy);
1224 emac_rx_clk_default(dev);
1225 netif_carrier_on(dev->ndev);
1226 link_poll_interval = PHY_POLL_LINK_ON;
1227 } else {
1228 emac_rx_clk_tx(dev);
1229 netif_carrier_off(dev->ndev);
1230 link_poll_interval = PHY_POLL_LINK_OFF;
1231 }
1232 dev->link_polling = 1;
1233 wmb();
1234 schedule_delayed_work(&dev->link_work, link_poll_interval);
1235 emac_print_link_status(dev);
1236 } else
1237 netif_carrier_on(dev->ndev);
1238
1239 /* Required for Pause packet support in EMAC */
1240 dev_mc_add_global(ndev, default_mcast_addr);
1241
1242 emac_configure(dev);
1243 mal_poll_add(dev->mal, &dev->commac);
1244 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1245 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1246 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1247 emac_tx_enable(dev);
1248 emac_rx_enable(dev);
1249 emac_netif_start(dev);
1250
1251 mutex_unlock(&dev->link_lock);
1252
1253 return 0;
1254 oom:
1255 emac_clean_rx_ring(dev);
1256 free_irq(dev->emac_irq, dev);
1257
1258 return -ENOMEM;
1259 }
1260
1261 /* BHs disabled */
1262 #if 0
1263 static int emac_link_differs(struct emac_instance *dev)
1264 {
1265 u32 r = in_be32(&dev->emacp->mr1);
1266
1267 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1268 int speed, pause, asym_pause;
1269
1270 if (r & EMAC_MR1_MF_1000)
1271 speed = SPEED_1000;
1272 else if (r & EMAC_MR1_MF_100)
1273 speed = SPEED_100;
1274 else
1275 speed = SPEED_10;
1276
1277 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1278 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1279 pause = 1;
1280 asym_pause = 0;
1281 break;
1282 case EMAC_MR1_APP:
1283 pause = 0;
1284 asym_pause = 1;
1285 break;
1286 default:
1287 pause = asym_pause = 0;
1288 }
1289 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1290 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1291 }
1292 #endif
1293
1294 static void emac_link_timer(struct work_struct *work)
1295 {
1296 struct emac_instance *dev =
1297 container_of(to_delayed_work(work),
1298 struct emac_instance, link_work);
1299 int link_poll_interval;
1300
1301 mutex_lock(&dev->link_lock);
1302 DBG2(dev, "link timer" NL);
1303
1304 if (!dev->opened)
1305 goto bail;
1306
1307 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1308 if (!netif_carrier_ok(dev->ndev)) {
1309 emac_rx_clk_default(dev);
1310 /* Get new link parameters */
1311 dev->phy.def->ops->read_link(&dev->phy);
1312
1313 netif_carrier_on(dev->ndev);
1314 emac_netif_stop(dev);
1315 emac_full_tx_reset(dev);
1316 emac_netif_start(dev);
1317 emac_print_link_status(dev);
1318 }
1319 link_poll_interval = PHY_POLL_LINK_ON;
1320 } else {
1321 if (netif_carrier_ok(dev->ndev)) {
1322 emac_rx_clk_tx(dev);
1323 netif_carrier_off(dev->ndev);
1324 netif_tx_disable(dev->ndev);
1325 emac_reinitialize(dev);
1326 emac_print_link_status(dev);
1327 }
1328 link_poll_interval = PHY_POLL_LINK_OFF;
1329 }
1330 schedule_delayed_work(&dev->link_work, link_poll_interval);
1331 bail:
1332 mutex_unlock(&dev->link_lock);
1333 }
1334
1335 static void emac_force_link_update(struct emac_instance *dev)
1336 {
1337 netif_carrier_off(dev->ndev);
1338 smp_rmb();
1339 if (dev->link_polling) {
1340 cancel_delayed_work_sync(&dev->link_work);
1341 if (dev->link_polling)
1342 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1343 }
1344 }
1345
1346 /* Process ctx, rtnl_lock semaphore */
1347 static int emac_close(struct net_device *ndev)
1348 {
1349 struct emac_instance *dev = netdev_priv(ndev);
1350
1351 DBG(dev, "close" NL);
1352
1353 if (dev->phy.address >= 0) {
1354 dev->link_polling = 0;
1355 cancel_delayed_work_sync(&dev->link_work);
1356 }
1357 mutex_lock(&dev->link_lock);
1358 emac_netif_stop(dev);
1359 dev->opened = 0;
1360 mutex_unlock(&dev->link_lock);
1361
1362 emac_rx_disable(dev);
1363 emac_tx_disable(dev);
1364 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1365 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1366 mal_poll_del(dev->mal, &dev->commac);
1367
1368 emac_clean_tx_ring(dev);
1369 emac_clean_rx_ring(dev);
1370
1371 free_irq(dev->emac_irq, dev);
1372
1373 netif_carrier_off(ndev);
1374
1375 return 0;
1376 }
1377
1378 static inline u16 emac_tx_csum(struct emac_instance *dev,
1379 struct sk_buff *skb)
1380 {
1381 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1382 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1383 ++dev->stats.tx_packets_csum;
1384 return EMAC_TX_CTRL_TAH_CSUM;
1385 }
1386 return 0;
1387 }
1388
1389 static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1390 {
1391 struct emac_regs __iomem *p = dev->emacp;
1392 struct net_device *ndev = dev->ndev;
1393
1394 /* Send the packet out. If the if makes a significant perf
1395 * difference, then we can store the TMR0 value in "dev"
1396 * instead
1397 */
1398 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1399 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
1400 else
1401 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1402
1403 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1404 netif_stop_queue(ndev);
1405 DBG2(dev, "stopped TX queue" NL);
1406 }
1407
1408 netif_trans_update(ndev);
1409 ++dev->stats.tx_packets;
1410 dev->stats.tx_bytes += len;
1411
1412 return NETDEV_TX_OK;
1413 }
1414
1415 /* Tx lock BH */
1416 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1417 {
1418 struct emac_instance *dev = netdev_priv(ndev);
1419 unsigned int len = skb->len;
1420 int slot;
1421
1422 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1423 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1424
1425 slot = dev->tx_slot++;
1426 if (dev->tx_slot == NUM_TX_BUFF) {
1427 dev->tx_slot = 0;
1428 ctrl |= MAL_TX_CTRL_WRAP;
1429 }
1430
1431 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1432
1433 dev->tx_skb[slot] = skb;
1434 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1435 skb->data, len,
1436 DMA_TO_DEVICE);
1437 dev->tx_desc[slot].data_len = (u16) len;
1438 wmb();
1439 dev->tx_desc[slot].ctrl = ctrl;
1440
1441 return emac_xmit_finish(dev, len);
1442 }
1443
1444 static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1445 u32 pd, int len, int last, u16 base_ctrl)
1446 {
1447 while (1) {
1448 u16 ctrl = base_ctrl;
1449 int chunk = min(len, MAL_MAX_TX_SIZE);
1450 len -= chunk;
1451
1452 slot = (slot + 1) % NUM_TX_BUFF;
1453
1454 if (last && !len)
1455 ctrl |= MAL_TX_CTRL_LAST;
1456 if (slot == NUM_TX_BUFF - 1)
1457 ctrl |= MAL_TX_CTRL_WRAP;
1458
1459 dev->tx_skb[slot] = NULL;
1460 dev->tx_desc[slot].data_ptr = pd;
1461 dev->tx_desc[slot].data_len = (u16) chunk;
1462 dev->tx_desc[slot].ctrl = ctrl;
1463 ++dev->tx_cnt;
1464
1465 if (!len)
1466 break;
1467
1468 pd += chunk;
1469 }
1470 return slot;
1471 }
1472
1473 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1474 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1475 {
1476 struct emac_instance *dev = netdev_priv(ndev);
1477 int nr_frags = skb_shinfo(skb)->nr_frags;
1478 int len = skb->len, chunk;
1479 int slot, i;
1480 u16 ctrl;
1481 u32 pd;
1482
1483 /* This is common "fast" path */
1484 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1485 return emac_start_xmit(skb, ndev);
1486
1487 len -= skb->data_len;
1488
1489 /* Note, this is only an *estimation*, we can still run out of empty
1490 * slots because of the additional fragmentation into
1491 * MAL_MAX_TX_SIZE-sized chunks
1492 */
1493 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1494 goto stop_queue;
1495
1496 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1497 emac_tx_csum(dev, skb);
1498 slot = dev->tx_slot;
1499
1500 /* skb data */
1501 dev->tx_skb[slot] = NULL;
1502 chunk = min(len, MAL_MAX_TX_SIZE);
1503 dev->tx_desc[slot].data_ptr = pd =
1504 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1505 dev->tx_desc[slot].data_len = (u16) chunk;
1506 len -= chunk;
1507 if (unlikely(len))
1508 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1509 ctrl);
1510 /* skb fragments */
1511 for (i = 0; i < nr_frags; ++i) {
1512 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
1513 len = skb_frag_size(frag);
1514
1515 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1516 goto undo_frame;
1517
1518 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1519 DMA_TO_DEVICE);
1520
1521 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1522 ctrl);
1523 }
1524
1525 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1526
1527 /* Attach skb to the last slot so we don't release it too early */
1528 dev->tx_skb[slot] = skb;
1529
1530 /* Send the packet out */
1531 if (dev->tx_slot == NUM_TX_BUFF - 1)
1532 ctrl |= MAL_TX_CTRL_WRAP;
1533 wmb();
1534 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1535 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1536
1537 return emac_xmit_finish(dev, skb->len);
1538
1539 undo_frame:
1540 /* Well, too bad. Our previous estimation was overly optimistic.
1541 * Undo everything.
1542 */
1543 while (slot != dev->tx_slot) {
1544 dev->tx_desc[slot].ctrl = 0;
1545 --dev->tx_cnt;
1546 if (--slot < 0)
1547 slot = NUM_TX_BUFF - 1;
1548 }
1549 ++dev->estats.tx_undo;
1550
1551 stop_queue:
1552 netif_stop_queue(ndev);
1553 DBG2(dev, "stopped TX queue" NL);
1554 return NETDEV_TX_BUSY;
1555 }
1556
1557 /* Tx lock BHs */
1558 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1559 {
1560 struct emac_error_stats *st = &dev->estats;
1561
1562 DBG(dev, "BD TX error %04x" NL, ctrl);
1563
1564 ++st->tx_bd_errors;
1565 if (ctrl & EMAC_TX_ST_BFCS)
1566 ++st->tx_bd_bad_fcs;
1567 if (ctrl & EMAC_TX_ST_LCS)
1568 ++st->tx_bd_carrier_loss;
1569 if (ctrl & EMAC_TX_ST_ED)
1570 ++st->tx_bd_excessive_deferral;
1571 if (ctrl & EMAC_TX_ST_EC)
1572 ++st->tx_bd_excessive_collisions;
1573 if (ctrl & EMAC_TX_ST_LC)
1574 ++st->tx_bd_late_collision;
1575 if (ctrl & EMAC_TX_ST_MC)
1576 ++st->tx_bd_multple_collisions;
1577 if (ctrl & EMAC_TX_ST_SC)
1578 ++st->tx_bd_single_collision;
1579 if (ctrl & EMAC_TX_ST_UR)
1580 ++st->tx_bd_underrun;
1581 if (ctrl & EMAC_TX_ST_SQE)
1582 ++st->tx_bd_sqe;
1583 }
1584
1585 static void emac_poll_tx(void *param)
1586 {
1587 struct emac_instance *dev = param;
1588 u32 bad_mask;
1589
1590 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1591
1592 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1593 bad_mask = EMAC_IS_BAD_TX_TAH;
1594 else
1595 bad_mask = EMAC_IS_BAD_TX;
1596
1597 netif_tx_lock_bh(dev->ndev);
1598 if (dev->tx_cnt) {
1599 u16 ctrl;
1600 int slot = dev->ack_slot, n = 0;
1601 again:
1602 ctrl = dev->tx_desc[slot].ctrl;
1603 if (!(ctrl & MAL_TX_CTRL_READY)) {
1604 struct sk_buff *skb = dev->tx_skb[slot];
1605 ++n;
1606
1607 if (skb) {
1608 dev_kfree_skb(skb);
1609 dev->tx_skb[slot] = NULL;
1610 }
1611 slot = (slot + 1) % NUM_TX_BUFF;
1612
1613 if (unlikely(ctrl & bad_mask))
1614 emac_parse_tx_error(dev, ctrl);
1615
1616 if (--dev->tx_cnt)
1617 goto again;
1618 }
1619 if (n) {
1620 dev->ack_slot = slot;
1621 if (netif_queue_stopped(dev->ndev) &&
1622 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1623 netif_wake_queue(dev->ndev);
1624
1625 DBG2(dev, "tx %d pkts" NL, n);
1626 }
1627 }
1628 netif_tx_unlock_bh(dev->ndev);
1629 }
1630
1631 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1632 int len)
1633 {
1634 struct sk_buff *skb = dev->rx_skb[slot];
1635
1636 DBG2(dev, "recycle %d %d" NL, slot, len);
1637
1638 if (len)
1639 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1640 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1641
1642 dev->rx_desc[slot].data_len = 0;
1643 wmb();
1644 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1645 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1646 }
1647
1648 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1649 {
1650 struct emac_error_stats *st = &dev->estats;
1651
1652 DBG(dev, "BD RX error %04x" NL, ctrl);
1653
1654 ++st->rx_bd_errors;
1655 if (ctrl & EMAC_RX_ST_OE)
1656 ++st->rx_bd_overrun;
1657 if (ctrl & EMAC_RX_ST_BP)
1658 ++st->rx_bd_bad_packet;
1659 if (ctrl & EMAC_RX_ST_RP)
1660 ++st->rx_bd_runt_packet;
1661 if (ctrl & EMAC_RX_ST_SE)
1662 ++st->rx_bd_short_event;
1663 if (ctrl & EMAC_RX_ST_AE)
1664 ++st->rx_bd_alignment_error;
1665 if (ctrl & EMAC_RX_ST_BFCS)
1666 ++st->rx_bd_bad_fcs;
1667 if (ctrl & EMAC_RX_ST_PTL)
1668 ++st->rx_bd_packet_too_long;
1669 if (ctrl & EMAC_RX_ST_ORE)
1670 ++st->rx_bd_out_of_range;
1671 if (ctrl & EMAC_RX_ST_IRE)
1672 ++st->rx_bd_in_range;
1673 }
1674
1675 static inline void emac_rx_csum(struct emac_instance *dev,
1676 struct sk_buff *skb, u16 ctrl)
1677 {
1678 #ifdef CONFIG_IBM_EMAC_TAH
1679 if (!ctrl && dev->tah_dev) {
1680 skb->ip_summed = CHECKSUM_UNNECESSARY;
1681 ++dev->stats.rx_packets_csum;
1682 }
1683 #endif
1684 }
1685
1686 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1687 {
1688 if (likely(dev->rx_sg_skb != NULL)) {
1689 int len = dev->rx_desc[slot].data_len;
1690 int tot_len = dev->rx_sg_skb->len + len;
1691
1692 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1693 ++dev->estats.rx_dropped_mtu;
1694 dev_kfree_skb(dev->rx_sg_skb);
1695 dev->rx_sg_skb = NULL;
1696 } else {
1697 memcpy(skb_tail_pointer(dev->rx_sg_skb),
1698 dev->rx_skb[slot]->data, len);
1699 skb_put(dev->rx_sg_skb, len);
1700 emac_recycle_rx_skb(dev, slot, len);
1701 return 0;
1702 }
1703 }
1704 emac_recycle_rx_skb(dev, slot, 0);
1705 return -1;
1706 }
1707
1708 /* NAPI poll context */
1709 static int emac_poll_rx(void *param, int budget)
1710 {
1711 struct emac_instance *dev = param;
1712 int slot = dev->rx_slot, received = 0;
1713
1714 DBG2(dev, "poll_rx(%d)" NL, budget);
1715
1716 again:
1717 while (budget > 0) {
1718 int len;
1719 struct sk_buff *skb;
1720 u16 ctrl = dev->rx_desc[slot].ctrl;
1721
1722 if (ctrl & MAL_RX_CTRL_EMPTY)
1723 break;
1724
1725 skb = dev->rx_skb[slot];
1726 mb();
1727 len = dev->rx_desc[slot].data_len;
1728
1729 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1730 goto sg;
1731
1732 ctrl &= EMAC_BAD_RX_MASK;
1733 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1734 emac_parse_rx_error(dev, ctrl);
1735 ++dev->estats.rx_dropped_error;
1736 emac_recycle_rx_skb(dev, slot, 0);
1737 len = 0;
1738 goto next;
1739 }
1740
1741 if (len < ETH_HLEN) {
1742 ++dev->estats.rx_dropped_stack;
1743 emac_recycle_rx_skb(dev, slot, len);
1744 goto next;
1745 }
1746
1747 if (len && len < EMAC_RX_COPY_THRESH) {
1748 struct sk_buff *copy_skb =
1749 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1750 if (unlikely(!copy_skb))
1751 goto oom;
1752
1753 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1754 memcpy(copy_skb->data - 2, skb->data - 2, len + 2);
1755 emac_recycle_rx_skb(dev, slot, len);
1756 skb = copy_skb;
1757 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1758 goto oom;
1759
1760 skb_put(skb, len);
1761 push_packet:
1762 skb->protocol = eth_type_trans(skb, dev->ndev);
1763 emac_rx_csum(dev, skb, ctrl);
1764
1765 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1766 ++dev->estats.rx_dropped_stack;
1767 next:
1768 ++dev->stats.rx_packets;
1769 skip:
1770 dev->stats.rx_bytes += len;
1771 slot = (slot + 1) % NUM_RX_BUFF;
1772 --budget;
1773 ++received;
1774 continue;
1775 sg:
1776 if (ctrl & MAL_RX_CTRL_FIRST) {
1777 BUG_ON(dev->rx_sg_skb);
1778 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1779 DBG(dev, "rx OOM %d" NL, slot);
1780 ++dev->estats.rx_dropped_oom;
1781 emac_recycle_rx_skb(dev, slot, 0);
1782 } else {
1783 dev->rx_sg_skb = skb;
1784 skb_put(skb, len);
1785 }
1786 } else if (!emac_rx_sg_append(dev, slot) &&
1787 (ctrl & MAL_RX_CTRL_LAST)) {
1788
1789 skb = dev->rx_sg_skb;
1790 dev->rx_sg_skb = NULL;
1791
1792 ctrl &= EMAC_BAD_RX_MASK;
1793 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1794 emac_parse_rx_error(dev, ctrl);
1795 ++dev->estats.rx_dropped_error;
1796 dev_kfree_skb(skb);
1797 len = 0;
1798 } else
1799 goto push_packet;
1800 }
1801 goto skip;
1802 oom:
1803 DBG(dev, "rx OOM %d" NL, slot);
1804 /* Drop the packet and recycle skb */
1805 ++dev->estats.rx_dropped_oom;
1806 emac_recycle_rx_skb(dev, slot, 0);
1807 goto next;
1808 }
1809
1810 if (received) {
1811 DBG2(dev, "rx %d BDs" NL, received);
1812 dev->rx_slot = slot;
1813 }
1814
1815 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1816 mb();
1817 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1818 DBG2(dev, "rx restart" NL);
1819 received = 0;
1820 goto again;
1821 }
1822
1823 if (dev->rx_sg_skb) {
1824 DBG2(dev, "dropping partial rx packet" NL);
1825 ++dev->estats.rx_dropped_error;
1826 dev_kfree_skb(dev->rx_sg_skb);
1827 dev->rx_sg_skb = NULL;
1828 }
1829
1830 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1831 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1832 emac_rx_enable(dev);
1833 dev->rx_slot = 0;
1834 }
1835 return received;
1836 }
1837
1838 /* NAPI poll context */
1839 static int emac_peek_rx(void *param)
1840 {
1841 struct emac_instance *dev = param;
1842
1843 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1844 }
1845
1846 /* NAPI poll context */
1847 static int emac_peek_rx_sg(void *param)
1848 {
1849 struct emac_instance *dev = param;
1850
1851 int slot = dev->rx_slot;
1852 while (1) {
1853 u16 ctrl = dev->rx_desc[slot].ctrl;
1854 if (ctrl & MAL_RX_CTRL_EMPTY)
1855 return 0;
1856 else if (ctrl & MAL_RX_CTRL_LAST)
1857 return 1;
1858
1859 slot = (slot + 1) % NUM_RX_BUFF;
1860
1861 /* I'm just being paranoid here :) */
1862 if (unlikely(slot == dev->rx_slot))
1863 return 0;
1864 }
1865 }
1866
1867 /* Hard IRQ */
1868 static void emac_rxde(void *param)
1869 {
1870 struct emac_instance *dev = param;
1871
1872 ++dev->estats.rx_stopped;
1873 emac_rx_disable_async(dev);
1874 }
1875
1876 /* Hard IRQ */
1877 static irqreturn_t emac_irq(int irq, void *dev_instance)
1878 {
1879 struct emac_instance *dev = dev_instance;
1880 struct emac_regs __iomem *p = dev->emacp;
1881 struct emac_error_stats *st = &dev->estats;
1882 u32 isr;
1883
1884 spin_lock(&dev->lock);
1885
1886 isr = in_be32(&p->isr);
1887 out_be32(&p->isr, isr);
1888
1889 DBG(dev, "isr = %08x" NL, isr);
1890
1891 if (isr & EMAC4_ISR_TXPE)
1892 ++st->tx_parity;
1893 if (isr & EMAC4_ISR_RXPE)
1894 ++st->rx_parity;
1895 if (isr & EMAC4_ISR_TXUE)
1896 ++st->tx_underrun;
1897 if (isr & EMAC4_ISR_RXOE)
1898 ++st->rx_fifo_overrun;
1899 if (isr & EMAC_ISR_OVR)
1900 ++st->rx_overrun;
1901 if (isr & EMAC_ISR_BP)
1902 ++st->rx_bad_packet;
1903 if (isr & EMAC_ISR_RP)
1904 ++st->rx_runt_packet;
1905 if (isr & EMAC_ISR_SE)
1906 ++st->rx_short_event;
1907 if (isr & EMAC_ISR_ALE)
1908 ++st->rx_alignment_error;
1909 if (isr & EMAC_ISR_BFCS)
1910 ++st->rx_bad_fcs;
1911 if (isr & EMAC_ISR_PTLE)
1912 ++st->rx_packet_too_long;
1913 if (isr & EMAC_ISR_ORE)
1914 ++st->rx_out_of_range;
1915 if (isr & EMAC_ISR_IRE)
1916 ++st->rx_in_range;
1917 if (isr & EMAC_ISR_SQE)
1918 ++st->tx_sqe;
1919 if (isr & EMAC_ISR_TE)
1920 ++st->tx_errors;
1921
1922 spin_unlock(&dev->lock);
1923
1924 return IRQ_HANDLED;
1925 }
1926
1927 static struct net_device_stats *emac_stats(struct net_device *ndev)
1928 {
1929 struct emac_instance *dev = netdev_priv(ndev);
1930 struct emac_stats *st = &dev->stats;
1931 struct emac_error_stats *est = &dev->estats;
1932 struct net_device_stats *nst = &dev->nstats;
1933 unsigned long flags;
1934
1935 DBG2(dev, "stats" NL);
1936
1937 /* Compute "legacy" statistics */
1938 spin_lock_irqsave(&dev->lock, flags);
1939 nst->rx_packets = (unsigned long)st->rx_packets;
1940 nst->rx_bytes = (unsigned long)st->rx_bytes;
1941 nst->tx_packets = (unsigned long)st->tx_packets;
1942 nst->tx_bytes = (unsigned long)st->tx_bytes;
1943 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1944 est->rx_dropped_error +
1945 est->rx_dropped_resize +
1946 est->rx_dropped_mtu);
1947 nst->tx_dropped = (unsigned long)est->tx_dropped;
1948
1949 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1950 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1951 est->rx_fifo_overrun +
1952 est->rx_overrun);
1953 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1954 est->rx_alignment_error);
1955 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1956 est->rx_bad_fcs);
1957 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1958 est->rx_bd_short_event +
1959 est->rx_bd_packet_too_long +
1960 est->rx_bd_out_of_range +
1961 est->rx_bd_in_range +
1962 est->rx_runt_packet +
1963 est->rx_short_event +
1964 est->rx_packet_too_long +
1965 est->rx_out_of_range +
1966 est->rx_in_range);
1967
1968 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1969 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1970 est->tx_underrun);
1971 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1972 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1973 est->tx_bd_excessive_collisions +
1974 est->tx_bd_late_collision +
1975 est->tx_bd_multple_collisions);
1976 spin_unlock_irqrestore(&dev->lock, flags);
1977 return nst;
1978 }
1979
1980 static struct mal_commac_ops emac_commac_ops = {
1981 .poll_tx = &emac_poll_tx,
1982 .poll_rx = &emac_poll_rx,
1983 .peek_rx = &emac_peek_rx,
1984 .rxde = &emac_rxde,
1985 };
1986
1987 static struct mal_commac_ops emac_commac_sg_ops = {
1988 .poll_tx = &emac_poll_tx,
1989 .poll_rx = &emac_poll_rx,
1990 .peek_rx = &emac_peek_rx_sg,
1991 .rxde = &emac_rxde,
1992 };
1993
1994 /* Ethtool support */
1995 static int emac_ethtool_get_link_ksettings(struct net_device *ndev,
1996 struct ethtool_link_ksettings *cmd)
1997 {
1998 struct emac_instance *dev = netdev_priv(ndev);
1999 u32 supported, advertising;
2000
2001 supported = dev->phy.features;
2002 cmd->base.port = PORT_MII;
2003 cmd->base.phy_address = dev->phy.address;
2004
2005 mutex_lock(&dev->link_lock);
2006 advertising = dev->phy.advertising;
2007 cmd->base.autoneg = dev->phy.autoneg;
2008 cmd->base.speed = dev->phy.speed;
2009 cmd->base.duplex = dev->phy.duplex;
2010 mutex_unlock(&dev->link_lock);
2011
2012 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2013 supported);
2014 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2015 advertising);
2016
2017 return 0;
2018 }
2019
2020 static int
2021 emac_ethtool_set_link_ksettings(struct net_device *ndev,
2022 const struct ethtool_link_ksettings *cmd)
2023 {
2024 struct emac_instance *dev = netdev_priv(ndev);
2025 u32 f = dev->phy.features;
2026 u32 advertising;
2027
2028 ethtool_convert_link_mode_to_legacy_u32(&advertising,
2029 cmd->link_modes.advertising);
2030
2031 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
2032 cmd->base.autoneg, cmd->base.speed, cmd->base.duplex, advertising);
2033
2034 /* Basic sanity checks */
2035 if (dev->phy.address < 0)
2036 return -EOPNOTSUPP;
2037 if (cmd->base.autoneg != AUTONEG_ENABLE &&
2038 cmd->base.autoneg != AUTONEG_DISABLE)
2039 return -EINVAL;
2040 if (cmd->base.autoneg == AUTONEG_ENABLE && advertising == 0)
2041 return -EINVAL;
2042 if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL)
2043 return -EINVAL;
2044
2045 if (cmd->base.autoneg == AUTONEG_DISABLE) {
2046 switch (cmd->base.speed) {
2047 case SPEED_10:
2048 if (cmd->base.duplex == DUPLEX_HALF &&
2049 !(f & SUPPORTED_10baseT_Half))
2050 return -EINVAL;
2051 if (cmd->base.duplex == DUPLEX_FULL &&
2052 !(f & SUPPORTED_10baseT_Full))
2053 return -EINVAL;
2054 break;
2055 case SPEED_100:
2056 if (cmd->base.duplex == DUPLEX_HALF &&
2057 !(f & SUPPORTED_100baseT_Half))
2058 return -EINVAL;
2059 if (cmd->base.duplex == DUPLEX_FULL &&
2060 !(f & SUPPORTED_100baseT_Full))
2061 return -EINVAL;
2062 break;
2063 case SPEED_1000:
2064 if (cmd->base.duplex == DUPLEX_HALF &&
2065 !(f & SUPPORTED_1000baseT_Half))
2066 return -EINVAL;
2067 if (cmd->base.duplex == DUPLEX_FULL &&
2068 !(f & SUPPORTED_1000baseT_Full))
2069 return -EINVAL;
2070 break;
2071 default:
2072 return -EINVAL;
2073 }
2074
2075 mutex_lock(&dev->link_lock);
2076 dev->phy.def->ops->setup_forced(&dev->phy, cmd->base.speed,
2077 cmd->base.duplex);
2078 mutex_unlock(&dev->link_lock);
2079
2080 } else {
2081 if (!(f & SUPPORTED_Autoneg))
2082 return -EINVAL;
2083
2084 mutex_lock(&dev->link_lock);
2085 dev->phy.def->ops->setup_aneg(&dev->phy,
2086 (advertising & f) |
2087 (dev->phy.advertising &
2088 (ADVERTISED_Pause |
2089 ADVERTISED_Asym_Pause)));
2090 mutex_unlock(&dev->link_lock);
2091 }
2092 emac_force_link_update(dev);
2093
2094 return 0;
2095 }
2096
2097 static void emac_ethtool_get_ringparam(struct net_device *ndev,
2098 struct ethtool_ringparam *rp)
2099 {
2100 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2101 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2102 }
2103
2104 static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2105 struct ethtool_pauseparam *pp)
2106 {
2107 struct emac_instance *dev = netdev_priv(ndev);
2108
2109 mutex_lock(&dev->link_lock);
2110 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2111 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2112 pp->autoneg = 1;
2113
2114 if (dev->phy.duplex == DUPLEX_FULL) {
2115 if (dev->phy.pause)
2116 pp->rx_pause = pp->tx_pause = 1;
2117 else if (dev->phy.asym_pause)
2118 pp->tx_pause = 1;
2119 }
2120 mutex_unlock(&dev->link_lock);
2121 }
2122
2123 static int emac_get_regs_len(struct emac_instance *dev)
2124 {
2125 return sizeof(struct emac_ethtool_regs_subhdr) +
2126 sizeof(struct emac_regs);
2127 }
2128
2129 static int emac_ethtool_get_regs_len(struct net_device *ndev)
2130 {
2131 struct emac_instance *dev = netdev_priv(ndev);
2132 int size;
2133
2134 size = sizeof(struct emac_ethtool_regs_hdr) +
2135 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2136 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2137 size += zmii_get_regs_len(dev->zmii_dev);
2138 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2139 size += rgmii_get_regs_len(dev->rgmii_dev);
2140 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2141 size += tah_get_regs_len(dev->tah_dev);
2142
2143 return size;
2144 }
2145
2146 static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2147 {
2148 struct emac_ethtool_regs_subhdr *hdr = buf;
2149
2150 hdr->index = dev->cell_index;
2151 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2152 hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER;
2153 } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2154 hdr->version = EMAC4_ETHTOOL_REGS_VER;
2155 } else {
2156 hdr->version = EMAC_ETHTOOL_REGS_VER;
2157 }
2158 memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs));
2159 return (void *)(hdr + 1) + sizeof(struct emac_regs);
2160 }
2161
2162 static void emac_ethtool_get_regs(struct net_device *ndev,
2163 struct ethtool_regs *regs, void *buf)
2164 {
2165 struct emac_instance *dev = netdev_priv(ndev);
2166 struct emac_ethtool_regs_hdr *hdr = buf;
2167
2168 hdr->components = 0;
2169 buf = hdr + 1;
2170
2171 buf = mal_dump_regs(dev->mal, buf);
2172 buf = emac_dump_regs(dev, buf);
2173 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2174 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2175 buf = zmii_dump_regs(dev->zmii_dev, buf);
2176 }
2177 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2178 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2179 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2180 }
2181 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2182 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2183 buf = tah_dump_regs(dev->tah_dev, buf);
2184 }
2185 }
2186
2187 static int emac_ethtool_nway_reset(struct net_device *ndev)
2188 {
2189 struct emac_instance *dev = netdev_priv(ndev);
2190 int res = 0;
2191
2192 DBG(dev, "nway_reset" NL);
2193
2194 if (dev->phy.address < 0)
2195 return -EOPNOTSUPP;
2196
2197 mutex_lock(&dev->link_lock);
2198 if (!dev->phy.autoneg) {
2199 res = -EINVAL;
2200 goto out;
2201 }
2202
2203 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2204 out:
2205 mutex_unlock(&dev->link_lock);
2206 emac_force_link_update(dev);
2207 return res;
2208 }
2209
2210 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
2211 {
2212 if (stringset == ETH_SS_STATS)
2213 return EMAC_ETHTOOL_STATS_COUNT;
2214 else
2215 return -EINVAL;
2216 }
2217
2218 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2219 u8 * buf)
2220 {
2221 if (stringset == ETH_SS_STATS)
2222 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2223 }
2224
2225 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2226 struct ethtool_stats *estats,
2227 u64 * tmp_stats)
2228 {
2229 struct emac_instance *dev = netdev_priv(ndev);
2230
2231 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2232 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2233 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2234 }
2235
2236 static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2237 struct ethtool_drvinfo *info)
2238 {
2239 struct emac_instance *dev = netdev_priv(ndev);
2240
2241 strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
2242 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2243 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
2244 dev->cell_index, dev->ofdev->dev.of_node->full_name);
2245 }
2246
2247 static const struct ethtool_ops emac_ethtool_ops = {
2248 .get_drvinfo = emac_ethtool_get_drvinfo,
2249
2250 .get_regs_len = emac_ethtool_get_regs_len,
2251 .get_regs = emac_ethtool_get_regs,
2252
2253 .nway_reset = emac_ethtool_nway_reset,
2254
2255 .get_ringparam = emac_ethtool_get_ringparam,
2256 .get_pauseparam = emac_ethtool_get_pauseparam,
2257
2258 .get_strings = emac_ethtool_get_strings,
2259 .get_sset_count = emac_ethtool_get_sset_count,
2260 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2261
2262 .get_link = ethtool_op_get_link,
2263 .get_link_ksettings = emac_ethtool_get_link_ksettings,
2264 .set_link_ksettings = emac_ethtool_set_link_ksettings,
2265 };
2266
2267 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2268 {
2269 struct emac_instance *dev = netdev_priv(ndev);
2270 struct mii_ioctl_data *data = if_mii(rq);
2271
2272 DBG(dev, "ioctl %08x" NL, cmd);
2273
2274 if (dev->phy.address < 0)
2275 return -EOPNOTSUPP;
2276
2277 switch (cmd) {
2278 case SIOCGMIIPHY:
2279 data->phy_id = dev->phy.address;
2280 /* Fall through */
2281 case SIOCGMIIREG:
2282 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2283 data->reg_num);
2284 return 0;
2285
2286 case SIOCSMIIREG:
2287 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2288 data->val_in);
2289 return 0;
2290 default:
2291 return -EOPNOTSUPP;
2292 }
2293 }
2294
2295 struct emac_depentry {
2296 u32 phandle;
2297 struct device_node *node;
2298 struct platform_device *ofdev;
2299 void *drvdata;
2300 };
2301
2302 #define EMAC_DEP_MAL_IDX 0
2303 #define EMAC_DEP_ZMII_IDX 1
2304 #define EMAC_DEP_RGMII_IDX 2
2305 #define EMAC_DEP_TAH_IDX 3
2306 #define EMAC_DEP_MDIO_IDX 4
2307 #define EMAC_DEP_PREV_IDX 5
2308 #define EMAC_DEP_COUNT 6
2309
2310 static int emac_check_deps(struct emac_instance *dev,
2311 struct emac_depentry *deps)
2312 {
2313 int i, there = 0;
2314 struct device_node *np;
2315
2316 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2317 /* no dependency on that item, allright */
2318 if (deps[i].phandle == 0) {
2319 there++;
2320 continue;
2321 }
2322 /* special case for blist as the dependency might go away */
2323 if (i == EMAC_DEP_PREV_IDX) {
2324 np = *(dev->blist - 1);
2325 if (np == NULL) {
2326 deps[i].phandle = 0;
2327 there++;
2328 continue;
2329 }
2330 if (deps[i].node == NULL)
2331 deps[i].node = of_node_get(np);
2332 }
2333 if (deps[i].node == NULL)
2334 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2335 if (deps[i].node == NULL)
2336 continue;
2337 if (deps[i].ofdev == NULL)
2338 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2339 if (deps[i].ofdev == NULL)
2340 continue;
2341 if (deps[i].drvdata == NULL)
2342 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
2343 if (deps[i].drvdata != NULL)
2344 there++;
2345 }
2346 return there == EMAC_DEP_COUNT;
2347 }
2348
2349 static void emac_put_deps(struct emac_instance *dev)
2350 {
2351 of_dev_put(dev->mal_dev);
2352 of_dev_put(dev->zmii_dev);
2353 of_dev_put(dev->rgmii_dev);
2354 of_dev_put(dev->mdio_dev);
2355 of_dev_put(dev->tah_dev);
2356 }
2357
2358 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
2359 void *data)
2360 {
2361 /* We are only intereted in device addition */
2362 if (action == BUS_NOTIFY_BOUND_DRIVER)
2363 wake_up_all(&emac_probe_wait);
2364 return 0;
2365 }
2366
2367 static struct notifier_block emac_of_bus_notifier = {
2368 .notifier_call = emac_of_bus_notify
2369 };
2370
2371 static int emac_wait_deps(struct emac_instance *dev)
2372 {
2373 struct emac_depentry deps[EMAC_DEP_COUNT];
2374 int i, err;
2375
2376 memset(&deps, 0, sizeof(deps));
2377
2378 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2379 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2380 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2381 if (dev->tah_ph)
2382 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2383 if (dev->mdio_ph)
2384 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2385 if (dev->blist && dev->blist > emac_boot_list)
2386 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
2387 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
2388 wait_event_timeout(emac_probe_wait,
2389 emac_check_deps(dev, deps),
2390 EMAC_PROBE_DEP_TIMEOUT);
2391 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
2392 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2393 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2394 of_node_put(deps[i].node);
2395 if (err)
2396 of_dev_put(deps[i].ofdev);
2397 }
2398 if (err == 0) {
2399 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2400 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2401 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2402 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2403 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2404 }
2405 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
2406 return err;
2407 }
2408
2409 static int emac_read_uint_prop(struct device_node *np, const char *name,
2410 u32 *val, int fatal)
2411 {
2412 int len;
2413 const u32 *prop = of_get_property(np, name, &len);
2414 if (prop == NULL || len < sizeof(u32)) {
2415 if (fatal)
2416 printk(KERN_ERR "%s: missing %s property\n",
2417 np->full_name, name);
2418 return -ENODEV;
2419 }
2420 *val = *prop;
2421 return 0;
2422 }
2423
2424 static void emac_adjust_link(struct net_device *ndev)
2425 {
2426 struct emac_instance *dev = netdev_priv(ndev);
2427 struct phy_device *phy = dev->phy_dev;
2428
2429 dev->phy.autoneg = phy->autoneg;
2430 dev->phy.speed = phy->speed;
2431 dev->phy.duplex = phy->duplex;
2432 dev->phy.pause = phy->pause;
2433 dev->phy.asym_pause = phy->asym_pause;
2434 dev->phy.advertising = phy->advertising;
2435 }
2436
2437 static int emac_mii_bus_read(struct mii_bus *bus, int addr, int regnum)
2438 {
2439 int ret = emac_mdio_read(bus->priv, addr, regnum);
2440 /* This is a workaround for powered down ports/phys.
2441 * In the wild, this was seen on the Cisco Meraki MX60(W).
2442 * This hardware disables ports as part of the handoff
2443 * procedure. Accessing the ports will lead to errors
2444 * (-ETIMEDOUT, -EREMOTEIO) that do more harm than good.
2445 */
2446 return ret < 0 ? 0xffff : ret;
2447 }
2448
2449 static int emac_mii_bus_write(struct mii_bus *bus, int addr,
2450 int regnum, u16 val)
2451 {
2452 emac_mdio_write(bus->priv, addr, regnum, val);
2453 return 0;
2454 }
2455
2456 static int emac_mii_bus_reset(struct mii_bus *bus)
2457 {
2458 struct emac_instance *dev = netdev_priv(bus->priv);
2459
2460 return emac_reset(dev);
2461 }
2462
2463 static int emac_mdio_setup_aneg(struct mii_phy *phy, u32 advertise)
2464 {
2465 struct net_device *ndev = phy->dev;
2466 struct emac_instance *dev = netdev_priv(ndev);
2467
2468 dev->phy.autoneg = AUTONEG_ENABLE;
2469 dev->phy.speed = SPEED_1000;
2470 dev->phy.duplex = DUPLEX_FULL;
2471 dev->phy.advertising = advertise;
2472 phy->autoneg = AUTONEG_ENABLE;
2473 phy->speed = dev->phy.speed;
2474 phy->duplex = dev->phy.duplex;
2475 phy->advertising = advertise;
2476 return phy_start_aneg(dev->phy_dev);
2477 }
2478
2479 static int emac_mdio_setup_forced(struct mii_phy *phy, int speed, int fd)
2480 {
2481 struct net_device *ndev = phy->dev;
2482 struct emac_instance *dev = netdev_priv(ndev);
2483
2484 dev->phy.autoneg = AUTONEG_DISABLE;
2485 dev->phy.speed = speed;
2486 dev->phy.duplex = fd;
2487 phy->autoneg = AUTONEG_DISABLE;
2488 phy->speed = speed;
2489 phy->duplex = fd;
2490 return phy_start_aneg(dev->phy_dev);
2491 }
2492
2493 static int emac_mdio_poll_link(struct mii_phy *phy)
2494 {
2495 struct net_device *ndev = phy->dev;
2496 struct emac_instance *dev = netdev_priv(ndev);
2497 int res;
2498
2499 res = phy_read_status(dev->phy_dev);
2500 if (res) {
2501 dev_err(&dev->ofdev->dev, "link update failed (%d).", res);
2502 return ethtool_op_get_link(ndev);
2503 }
2504
2505 return dev->phy_dev->link;
2506 }
2507
2508 static int emac_mdio_read_link(struct mii_phy *phy)
2509 {
2510 struct net_device *ndev = phy->dev;
2511 struct emac_instance *dev = netdev_priv(ndev);
2512 int res;
2513
2514 res = phy_read_status(dev->phy_dev);
2515 if (res)
2516 return res;
2517
2518 dev->phy.speed = phy->speed;
2519 dev->phy.duplex = phy->duplex;
2520 dev->phy.pause = phy->pause;
2521 dev->phy.asym_pause = phy->asym_pause;
2522 return 0;
2523 }
2524
2525 static int emac_mdio_init_phy(struct mii_phy *phy)
2526 {
2527 struct net_device *ndev = phy->dev;
2528 struct emac_instance *dev = netdev_priv(ndev);
2529
2530 phy_start(dev->phy_dev);
2531 dev->phy.autoneg = phy->autoneg;
2532 dev->phy.speed = phy->speed;
2533 dev->phy.duplex = phy->duplex;
2534 dev->phy.advertising = phy->advertising;
2535 dev->phy.pause = phy->pause;
2536 dev->phy.asym_pause = phy->asym_pause;
2537
2538 return phy_init_hw(dev->phy_dev);
2539 }
2540
2541 static const struct mii_phy_ops emac_dt_mdio_phy_ops = {
2542 .init = emac_mdio_init_phy,
2543 .setup_aneg = emac_mdio_setup_aneg,
2544 .setup_forced = emac_mdio_setup_forced,
2545 .poll_link = emac_mdio_poll_link,
2546 .read_link = emac_mdio_read_link,
2547 };
2548
2549 static int emac_dt_mdio_probe(struct emac_instance *dev)
2550 {
2551 struct device_node *mii_np;
2552 int res;
2553
2554 mii_np = of_get_child_by_name(dev->ofdev->dev.of_node, "mdio");
2555 if (!mii_np) {
2556 dev_err(&dev->ofdev->dev, "no mdio definition found.");
2557 return -ENODEV;
2558 }
2559
2560 if (!of_device_is_available(mii_np)) {
2561 res = -ENODEV;
2562 goto put_node;
2563 }
2564
2565 dev->mii_bus = devm_mdiobus_alloc(&dev->ofdev->dev);
2566 if (!dev->mii_bus) {
2567 res = -ENOMEM;
2568 goto put_node;
2569 }
2570
2571 dev->mii_bus->priv = dev->ndev;
2572 dev->mii_bus->parent = dev->ndev->dev.parent;
2573 dev->mii_bus->name = "emac_mdio";
2574 dev->mii_bus->read = &emac_mii_bus_read;
2575 dev->mii_bus->write = &emac_mii_bus_write;
2576 dev->mii_bus->reset = &emac_mii_bus_reset;
2577 snprintf(dev->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev->ofdev->name);
2578 res = of_mdiobus_register(dev->mii_bus, mii_np);
2579 if (res) {
2580 dev_err(&dev->ofdev->dev, "cannot register MDIO bus %s (%d)",
2581 dev->mii_bus->name, res);
2582 }
2583
2584 put_node:
2585 of_node_put(mii_np);
2586 return res;
2587 }
2588
2589 static int emac_dt_phy_connect(struct emac_instance *dev,
2590 struct device_node *phy_handle)
2591 {
2592 int res;
2593
2594 dev->phy.def = devm_kzalloc(&dev->ofdev->dev, sizeof(*dev->phy.def),
2595 GFP_KERNEL);
2596 if (!dev->phy.def)
2597 return -ENOMEM;
2598
2599 dev->phy_dev = of_phy_connect(dev->ndev, phy_handle, &emac_adjust_link,
2600 0, dev->phy_mode);
2601 if (!dev->phy_dev) {
2602 dev_err(&dev->ofdev->dev, "failed to connect to PHY.\n");
2603 return -ENODEV;
2604 }
2605
2606 dev->phy.def->phy_id = dev->phy_dev->drv->phy_id;
2607 dev->phy.def->phy_id_mask = dev->phy_dev->drv->phy_id_mask;
2608 dev->phy.def->name = dev->phy_dev->drv->name;
2609 dev->phy.def->ops = &emac_dt_mdio_phy_ops;
2610 dev->phy.features = dev->phy_dev->supported;
2611 dev->phy.address = dev->phy_dev->mdio.addr;
2612 dev->phy.mode = dev->phy_dev->interface;
2613 return 0;
2614 }
2615
2616 static int emac_dt_phy_probe(struct emac_instance *dev)
2617 {
2618 struct device_node *np = dev->ofdev->dev.of_node;
2619 struct device_node *phy_handle;
2620 int res = 0;
2621
2622 phy_handle = of_parse_phandle(np, "phy-handle", 0);
2623
2624 if (phy_handle) {
2625 res = emac_dt_mdio_probe(dev);
2626 if (!res) {
2627 res = emac_dt_phy_connect(dev, phy_handle);
2628 if (res)
2629 mdiobus_unregister(dev->mii_bus);
2630 }
2631 }
2632
2633 of_node_put(phy_handle);
2634 return res;
2635 }
2636
2637 static int emac_init_phy(struct emac_instance *dev)
2638 {
2639 struct device_node *np = dev->ofdev->dev.of_node;
2640 struct net_device *ndev = dev->ndev;
2641 u32 phy_map, adv;
2642 int i;
2643
2644 dev->phy.dev = ndev;
2645 dev->phy.mode = dev->phy_mode;
2646
2647 /* PHY-less configuration. */
2648 if ((dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) ||
2649 of_phy_is_fixed_link(np)) {
2650 emac_reset(dev);
2651
2652 /* PHY-less configuration. */
2653 dev->phy.address = -1;
2654 dev->phy.features = SUPPORTED_MII;
2655 if (emac_phy_supports_gige(dev->phy_mode))
2656 dev->phy.features |= SUPPORTED_1000baseT_Full;
2657 else
2658 dev->phy.features |= SUPPORTED_100baseT_Full;
2659 dev->phy.pause = 1;
2660
2661 if (of_phy_is_fixed_link(np)) {
2662 int res = emac_dt_mdio_probe(dev);
2663
2664 if (!res) {
2665 res = of_phy_register_fixed_link(np);
2666 if (res)
2667 mdiobus_unregister(dev->mii_bus);
2668 }
2669 return res;
2670 }
2671 return 0;
2672 }
2673
2674 mutex_lock(&emac_phy_map_lock);
2675 phy_map = dev->phy_map | busy_phy_map;
2676
2677 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2678
2679 dev->phy.mdio_read = emac_mdio_read;
2680 dev->phy.mdio_write = emac_mdio_write;
2681
2682 /* Enable internal clock source */
2683 #ifdef CONFIG_PPC_DCR_NATIVE
2684 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2685 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2686 #endif
2687 /* PHY clock workaround */
2688 emac_rx_clk_tx(dev);
2689
2690 /* Enable internal clock source on 440GX*/
2691 #ifdef CONFIG_PPC_DCR_NATIVE
2692 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2693 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
2694 #endif
2695 /* Configure EMAC with defaults so we can at least use MDIO
2696 * This is needed mostly for 440GX
2697 */
2698 if (emac_phy_gpcs(dev->phy.mode)) {
2699 /* XXX
2700 * Make GPCS PHY address equal to EMAC index.
2701 * We probably should take into account busy_phy_map
2702 * and/or phy_map here.
2703 *
2704 * Note that the busy_phy_map is currently global
2705 * while it should probably be per-ASIC...
2706 */
2707 dev->phy.gpcs_address = dev->gpcs_address;
2708 if (dev->phy.gpcs_address == 0xffffffff)
2709 dev->phy.address = dev->cell_index;
2710 }
2711
2712 emac_configure(dev);
2713
2714 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2715 int res = emac_dt_phy_probe(dev);
2716
2717 mutex_unlock(&emac_phy_map_lock);
2718 if (!res)
2719 goto init_phy;
2720
2721 dev_err(&dev->ofdev->dev, "failed to attach dt phy (%d).\n",
2722 res);
2723 return res;
2724 }
2725
2726 if (dev->phy_address != 0xffffffff)
2727 phy_map = ~(1 << dev->phy_address);
2728
2729 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2730 if (!(phy_map & 1)) {
2731 int r;
2732 busy_phy_map |= 1 << i;
2733
2734 /* Quick check if there is a PHY at the address */
2735 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2736 if (r == 0xffff || r < 0)
2737 continue;
2738 if (!emac_mii_phy_probe(&dev->phy, i))
2739 break;
2740 }
2741
2742 /* Enable external clock source */
2743 #ifdef CONFIG_PPC_DCR_NATIVE
2744 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2745 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2746 #endif
2747 mutex_unlock(&emac_phy_map_lock);
2748 if (i == 0x20) {
2749 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2750 return -ENXIO;
2751 }
2752
2753 init_phy:
2754 /* Init PHY */
2755 if (dev->phy.def->ops->init)
2756 dev->phy.def->ops->init(&dev->phy);
2757
2758 /* Disable any PHY features not supported by the platform */
2759 dev->phy.def->features &= ~dev->phy_feat_exc;
2760 dev->phy.features &= ~dev->phy_feat_exc;
2761
2762 /* Setup initial link parameters */
2763 if (dev->phy.features & SUPPORTED_Autoneg) {
2764 adv = dev->phy.features;
2765 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2766 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2767 /* Restart autonegotiation */
2768 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2769 } else {
2770 u32 f = dev->phy.def->features;
2771 int speed = SPEED_10, fd = DUPLEX_HALF;
2772
2773 /* Select highest supported speed/duplex */
2774 if (f & SUPPORTED_1000baseT_Full) {
2775 speed = SPEED_1000;
2776 fd = DUPLEX_FULL;
2777 } else if (f & SUPPORTED_1000baseT_Half)
2778 speed = SPEED_1000;
2779 else if (f & SUPPORTED_100baseT_Full) {
2780 speed = SPEED_100;
2781 fd = DUPLEX_FULL;
2782 } else if (f & SUPPORTED_100baseT_Half)
2783 speed = SPEED_100;
2784 else if (f & SUPPORTED_10baseT_Full)
2785 fd = DUPLEX_FULL;
2786
2787 /* Force link parameters */
2788 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2789 }
2790 return 0;
2791 }
2792
2793 static int emac_init_config(struct emac_instance *dev)
2794 {
2795 struct device_node *np = dev->ofdev->dev.of_node;
2796 const void *p;
2797
2798 /* Read config from device-tree */
2799 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2800 return -ENXIO;
2801 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2802 return -ENXIO;
2803 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2804 return -ENXIO;
2805 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2806 return -ENXIO;
2807 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2808 dev->max_mtu = ETH_DATA_LEN;
2809 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2810 dev->rx_fifo_size = 2048;
2811 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2812 dev->tx_fifo_size = 2048;
2813 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2814 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2815 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2816 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2817 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2818 dev->phy_address = 0xffffffff;
2819 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2820 dev->phy_map = 0xffffffff;
2821 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2822 dev->gpcs_address = 0xffffffff;
2823 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2824 return -ENXIO;
2825 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2826 dev->tah_ph = 0;
2827 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
2828 dev->tah_port = 0;
2829 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2830 dev->mdio_ph = 0;
2831 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
2832 dev->zmii_ph = 0;
2833 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
2834 dev->zmii_port = 0xffffffff;
2835 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
2836 dev->rgmii_ph = 0;
2837 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
2838 dev->rgmii_port = 0xffffffff;
2839 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2840 dev->fifo_entry_size = 16;
2841 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2842 dev->mal_burst_size = 256;
2843
2844 /* PHY mode needs some decoding */
2845 dev->phy_mode = of_get_phy_mode(np);
2846 if (dev->phy_mode < 0)
2847 dev->phy_mode = PHY_MODE_NA;
2848
2849 /* Check EMAC version */
2850 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2851 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
2852 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2853 of_device_is_compatible(np, "ibm,emac-460gt"))
2854 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
2855 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2856 of_device_is_compatible(np, "ibm,emac-405exr"))
2857 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2858 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2859 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2860 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2861 EMAC_FTR_460EX_PHY_CLK_FIX);
2862 }
2863 } else if (of_device_is_compatible(np, "ibm,emac4")) {
2864 dev->features |= EMAC_FTR_EMAC4;
2865 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2866 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
2867 } else {
2868 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2869 of_device_is_compatible(np, "ibm,emac-440gr"))
2870 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
2871 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
2872 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
2873 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
2874 #else
2875 printk(KERN_ERR "%s: Flow control not disabled!\n",
2876 np->full_name);
2877 return -ENXIO;
2878 #endif
2879 }
2880
2881 }
2882
2883 /* Fixup some feature bits based on the device tree */
2884 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
2885 dev->features |= EMAC_FTR_STACR_OC_INVERT;
2886 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2887 dev->features |= EMAC_FTR_HAS_NEW_STACR;
2888
2889 /* CAB lacks the appropriate properties */
2890 if (of_device_is_compatible(np, "ibm,emac-axon"))
2891 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2892 EMAC_FTR_STACR_OC_INVERT;
2893
2894 /* Enable TAH/ZMII/RGMII features as found */
2895 if (dev->tah_ph != 0) {
2896 #ifdef CONFIG_IBM_EMAC_TAH
2897 dev->features |= EMAC_FTR_HAS_TAH;
2898 #else
2899 printk(KERN_ERR "%s: TAH support not enabled !\n",
2900 np->full_name);
2901 return -ENXIO;
2902 #endif
2903 }
2904
2905 if (dev->zmii_ph != 0) {
2906 #ifdef CONFIG_IBM_EMAC_ZMII
2907 dev->features |= EMAC_FTR_HAS_ZMII;
2908 #else
2909 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2910 np->full_name);
2911 return -ENXIO;
2912 #endif
2913 }
2914
2915 if (dev->rgmii_ph != 0) {
2916 #ifdef CONFIG_IBM_EMAC_RGMII
2917 dev->features |= EMAC_FTR_HAS_RGMII;
2918 #else
2919 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2920 np->full_name);
2921 return -ENXIO;
2922 #endif
2923 }
2924
2925 /* Read MAC-address */
2926 p = of_get_property(np, "local-mac-address", NULL);
2927 if (p == NULL) {
2928 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2929 np->full_name);
2930 return -ENXIO;
2931 }
2932 memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
2933
2934 /* IAHT and GAHT filter parameterization */
2935 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2936 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2937 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2938 } else {
2939 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2940 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2941 }
2942
2943 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2944 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2945 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2946 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2947 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2948
2949 return 0;
2950 }
2951
2952 static const struct net_device_ops emac_netdev_ops = {
2953 .ndo_open = emac_open,
2954 .ndo_stop = emac_close,
2955 .ndo_get_stats = emac_stats,
2956 .ndo_set_rx_mode = emac_set_multicast_list,
2957 .ndo_do_ioctl = emac_ioctl,
2958 .ndo_tx_timeout = emac_tx_timeout,
2959 .ndo_validate_addr = eth_validate_addr,
2960 .ndo_set_mac_address = emac_set_mac_address,
2961 .ndo_start_xmit = emac_start_xmit,
2962 };
2963
2964 static const struct net_device_ops emac_gige_netdev_ops = {
2965 .ndo_open = emac_open,
2966 .ndo_stop = emac_close,
2967 .ndo_get_stats = emac_stats,
2968 .ndo_set_rx_mode = emac_set_multicast_list,
2969 .ndo_do_ioctl = emac_ioctl,
2970 .ndo_tx_timeout = emac_tx_timeout,
2971 .ndo_validate_addr = eth_validate_addr,
2972 .ndo_set_mac_address = emac_set_mac_address,
2973 .ndo_start_xmit = emac_start_xmit_sg,
2974 .ndo_change_mtu = emac_change_mtu,
2975 };
2976
2977 static int emac_probe(struct platform_device *ofdev)
2978 {
2979 struct net_device *ndev;
2980 struct emac_instance *dev;
2981 struct device_node *np = ofdev->dev.of_node;
2982 struct device_node **blist = NULL;
2983 int err, i;
2984
2985 /* Skip unused/unwired EMACS. We leave the check for an unused
2986 * property here for now, but new flat device trees should set a
2987 * status property to "disabled" instead.
2988 */
2989 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
2990 return -ENODEV;
2991
2992 /* Find ourselves in the bootlist if we are there */
2993 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2994 if (emac_boot_list[i] == np)
2995 blist = &emac_boot_list[i];
2996
2997 /* Allocate our net_device structure */
2998 err = -ENOMEM;
2999 ndev = alloc_etherdev(sizeof(struct emac_instance));
3000 if (!ndev)
3001 goto err_gone;
3002
3003 dev = netdev_priv(ndev);
3004 dev->ndev = ndev;
3005 dev->ofdev = ofdev;
3006 dev->blist = blist;
3007 SET_NETDEV_DEV(ndev, &ofdev->dev);
3008
3009 /* Initialize some embedded data structures */
3010 mutex_init(&dev->mdio_lock);
3011 mutex_init(&dev->link_lock);
3012 spin_lock_init(&dev->lock);
3013 INIT_WORK(&dev->reset_work, emac_reset_work);
3014
3015 /* Init various config data based on device-tree */
3016 err = emac_init_config(dev);
3017 if (err != 0)
3018 goto err_free;
3019
3020 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
3021 dev->emac_irq = irq_of_parse_and_map(np, 0);
3022 dev->wol_irq = irq_of_parse_and_map(np, 1);
3023 if (!dev->emac_irq) {
3024 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
3025 goto err_free;
3026 }
3027 ndev->irq = dev->emac_irq;
3028
3029 /* Map EMAC regs */
3030 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
3031 printk(KERN_ERR "%s: Can't get registers address\n",
3032 np->full_name);
3033 goto err_irq_unmap;
3034 }
3035 // TODO : request_mem_region
3036 dev->emacp = ioremap(dev->rsrc_regs.start,
3037 resource_size(&dev->rsrc_regs));
3038 if (dev->emacp == NULL) {
3039 printk(KERN_ERR "%s: Can't map device registers!\n",
3040 np->full_name);
3041 err = -ENOMEM;
3042 goto err_irq_unmap;
3043 }
3044
3045 /* Wait for dependent devices */
3046 err = emac_wait_deps(dev);
3047 if (err) {
3048 printk(KERN_ERR
3049 "%s: Timeout waiting for dependent devices\n",
3050 np->full_name);
3051 /* display more info about what's missing ? */
3052 goto err_reg_unmap;
3053 }
3054 dev->mal = platform_get_drvdata(dev->mal_dev);
3055 if (dev->mdio_dev != NULL)
3056 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
3057
3058 /* Register with MAL */
3059 dev->commac.ops = &emac_commac_ops;
3060 dev->commac.dev = dev;
3061 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
3062 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
3063 err = mal_register_commac(dev->mal, &dev->commac);
3064 if (err) {
3065 printk(KERN_ERR "%s: failed to register with mal %s!\n",
3066 np->full_name, dev->mal_dev->dev.of_node->full_name);
3067 goto err_rel_deps;
3068 }
3069 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
3070 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
3071
3072 /* Get pointers to BD rings */
3073 dev->tx_desc =
3074 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
3075 dev->rx_desc =
3076 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
3077
3078 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
3079 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
3080
3081 /* Clean rings */
3082 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
3083 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
3084 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
3085 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
3086
3087 /* Attach to ZMII, if needed */
3088 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
3089 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
3090 goto err_unreg_commac;
3091
3092 /* Attach to RGMII, if needed */
3093 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
3094 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
3095 goto err_detach_zmii;
3096
3097 /* Attach to TAH, if needed */
3098 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
3099 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
3100 goto err_detach_rgmii;
3101
3102 /* Set some link defaults before we can find out real parameters */
3103 dev->phy.speed = SPEED_100;
3104 dev->phy.duplex = DUPLEX_FULL;
3105 dev->phy.autoneg = AUTONEG_DISABLE;
3106 dev->phy.pause = dev->phy.asym_pause = 0;
3107 dev->stop_timeout = STOP_TIMEOUT_100;
3108 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
3109
3110 /* Some SoCs like APM821xx does not support Half Duplex mode. */
3111 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
3112 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
3113 SUPPORTED_100baseT_Half |
3114 SUPPORTED_10baseT_Half);
3115 }
3116
3117 /* Find PHY if any */
3118 err = emac_init_phy(dev);
3119 if (err != 0)
3120 goto err_detach_tah;
3121
3122 if (dev->tah_dev) {
3123 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
3124 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
3125 }
3126 ndev->watchdog_timeo = 5 * HZ;
3127 if (emac_phy_supports_gige(dev->phy_mode)) {
3128 ndev->netdev_ops = &emac_gige_netdev_ops;
3129 dev->commac.ops = &emac_commac_sg_ops;
3130 } else
3131 ndev->netdev_ops = &emac_netdev_ops;
3132 ndev->ethtool_ops = &emac_ethtool_ops;
3133
3134 /* MTU range: 46 - 1500 or whatever is in OF */
3135 ndev->min_mtu = EMAC_MIN_MTU;
3136 ndev->max_mtu = dev->max_mtu;
3137
3138 netif_carrier_off(ndev);
3139
3140 err = register_netdev(ndev);
3141 if (err) {
3142 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
3143 np->full_name, err);
3144 goto err_detach_tah;
3145 }
3146
3147 /* Set our drvdata last as we don't want them visible until we are
3148 * fully initialized
3149 */
3150 wmb();
3151 platform_set_drvdata(ofdev, dev);
3152
3153 /* There's a new kid in town ! Let's tell everybody */
3154 wake_up_all(&emac_probe_wait);
3155
3156
3157 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
3158 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
3159
3160 if (dev->phy_mode == PHY_MODE_SGMII)
3161 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
3162
3163 if (dev->phy.address >= 0)
3164 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
3165 dev->phy.def->name, dev->phy.address);
3166
3167 emac_dbg_register(dev);
3168
3169 /* Life is good */
3170 return 0;
3171
3172 /* I have a bad feeling about this ... */
3173
3174 err_detach_tah:
3175 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
3176 tah_detach(dev->tah_dev, dev->tah_port);
3177 err_detach_rgmii:
3178 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
3179 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
3180 err_detach_zmii:
3181 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
3182 zmii_detach(dev->zmii_dev, dev->zmii_port);
3183 err_unreg_commac:
3184 mal_unregister_commac(dev->mal, &dev->commac);
3185 err_rel_deps:
3186 emac_put_deps(dev);
3187 err_reg_unmap:
3188 iounmap(dev->emacp);
3189 err_irq_unmap:
3190 if (dev->wol_irq)
3191 irq_dispose_mapping(dev->wol_irq);
3192 if (dev->emac_irq)
3193 irq_dispose_mapping(dev->emac_irq);
3194 err_free:
3195 free_netdev(ndev);
3196 err_gone:
3197 /* if we were on the bootlist, remove us as we won't show up and
3198 * wake up all waiters to notify them in case they were waiting
3199 * on us
3200 */
3201 if (blist) {
3202 *blist = NULL;
3203 wake_up_all(&emac_probe_wait);
3204 }
3205 return err;
3206 }
3207
3208 static int emac_remove(struct platform_device *ofdev)
3209 {
3210 struct emac_instance *dev = platform_get_drvdata(ofdev);
3211
3212 DBG(dev, "remove" NL);
3213
3214 unregister_netdev(dev->ndev);
3215
3216 cancel_work_sync(&dev->reset_work);
3217
3218 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
3219 tah_detach(dev->tah_dev, dev->tah_port);
3220 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
3221 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
3222 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
3223 zmii_detach(dev->zmii_dev, dev->zmii_port);
3224
3225 if (dev->phy_dev)
3226 phy_disconnect(dev->phy_dev);
3227
3228 if (dev->mii_bus)
3229 mdiobus_unregister(dev->mii_bus);
3230
3231 busy_phy_map &= ~(1 << dev->phy.address);
3232 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
3233
3234 mal_unregister_commac(dev->mal, &dev->commac);
3235 emac_put_deps(dev);
3236
3237 emac_dbg_unregister(dev);
3238 iounmap(dev->emacp);
3239
3240 if (dev->wol_irq)
3241 irq_dispose_mapping(dev->wol_irq);
3242 if (dev->emac_irq)
3243 irq_dispose_mapping(dev->emac_irq);
3244
3245 free_netdev(dev->ndev);
3246
3247 return 0;
3248 }
3249
3250 /* XXX Features in here should be replaced by properties... */
3251 static const struct of_device_id emac_match[] =
3252 {
3253 {
3254 .type = "network",
3255 .compatible = "ibm,emac",
3256 },
3257 {
3258 .type = "network",
3259 .compatible = "ibm,emac4",
3260 },
3261 {
3262 .type = "network",
3263 .compatible = "ibm,emac4sync",
3264 },
3265 {},
3266 };
3267 MODULE_DEVICE_TABLE(of, emac_match);
3268
3269 static struct platform_driver emac_driver = {
3270 .driver = {
3271 .name = "emac",
3272 .of_match_table = emac_match,
3273 },
3274 .probe = emac_probe,
3275 .remove = emac_remove,
3276 };
3277
3278 static void __init emac_make_bootlist(void)
3279 {
3280 struct device_node *np = NULL;
3281 int j, max, i = 0;
3282 int cell_indices[EMAC_BOOT_LIST_SIZE];
3283
3284 /* Collect EMACs */
3285 while((np = of_find_all_nodes(np)) != NULL) {
3286 const u32 *idx;
3287
3288 if (of_match_node(emac_match, np) == NULL)
3289 continue;
3290 if (of_get_property(np, "unused", NULL))
3291 continue;
3292 idx = of_get_property(np, "cell-index", NULL);
3293 if (idx == NULL)
3294 continue;
3295 cell_indices[i] = *idx;
3296 emac_boot_list[i++] = of_node_get(np);
3297 if (i >= EMAC_BOOT_LIST_SIZE) {
3298 of_node_put(np);
3299 break;
3300 }
3301 }
3302 max = i;
3303
3304 /* Bubble sort them (doh, what a creative algorithm :-) */
3305 for (i = 0; max > 1 && (i < (max - 1)); i++)
3306 for (j = i; j < max; j++) {
3307 if (cell_indices[i] > cell_indices[j]) {
3308 swap(emac_boot_list[i], emac_boot_list[j]);
3309 swap(cell_indices[i], cell_indices[j]);
3310 }
3311 }
3312 }
3313
3314 static int __init emac_init(void)
3315 {
3316 int rc;
3317
3318 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3319
3320 /* Init debug stuff */
3321 emac_init_debug();
3322
3323 /* Build EMAC boot list */
3324 emac_make_bootlist();
3325
3326 /* Init submodules */
3327 rc = mal_init();
3328 if (rc)
3329 goto err;
3330 rc = zmii_init();
3331 if (rc)
3332 goto err_mal;
3333 rc = rgmii_init();
3334 if (rc)
3335 goto err_zmii;
3336 rc = tah_init();
3337 if (rc)
3338 goto err_rgmii;
3339 rc = platform_driver_register(&emac_driver);
3340 if (rc)
3341 goto err_tah;
3342
3343 return 0;
3344
3345 err_tah:
3346 tah_exit();
3347 err_rgmii:
3348 rgmii_exit();
3349 err_zmii:
3350 zmii_exit();
3351 err_mal:
3352 mal_exit();
3353 err:
3354 return rc;
3355 }
3356
3357 static void __exit emac_exit(void)
3358 {
3359 int i;
3360
3361 platform_driver_unregister(&emac_driver);
3362
3363 tah_exit();
3364 rgmii_exit();
3365 zmii_exit();
3366 mal_exit();
3367 emac_fini_debug();
3368
3369 /* Destroy EMAC boot list */
3370 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
3371 of_node_put(emac_boot_list[i]);
3372 }
3373
3374 module_init(emac_init);
3375 module_exit(emac_exit);
ubuntu-bionic-kernel mirror