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Merge branch 'for-davem' into for-next
[deliverable/linux.git] / drivers / net / ethernet / ibm / emac / core.c
CommitLineData
1d3bb996 1/*
3396c782 2 * drivers/net/ethernet/ibm/emac/core.c
1d3bb996
DG		 3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller.
5 *
17cf803a
BH		 6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
7 * <benh@kernel.crashing.org>
8 *
9 * Based on the arch/ppc version of the driver:
10 *
1d3bb996
DG		 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
e72701ac 27#include <linux/module.h>
1d3bb996
DG		 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>
283029d1 41#include <linux/of.h>
5af50730
RH		 42#include <linux/of_address.h>
43#include <linux/of_irq.h>
4157ef1b 44#include <linux/of_net.h>
5a0e3ad6 45#include <linux/slab.h>
1d3bb996
DG		 46
47#include <asm/processor.h>
48#include <asm/io.h>
49#include <asm/dma.h>
50#include <asm/uaccess.h>
0925ab5d
VB		 51#include <asm/dcr.h>
52#include <asm/dcr-regs.h>
1d3bb996
DG		 53
54#include "core.h"
55
56/*
57 * Lack of dma_unmap_???? calls is intentional.
58 *
59 * API-correct usage requires additional support state information to be
60 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to
61 * EMAC design (e.g. TX buffer passed from network stack can be split into
62 * several BDs, dma_map_single/dma_map_page can be used to map particular BD),
63 * maintaining such information will add additional overhead.
64 * Current DMA API implementation for 4xx processors only ensures cache coherency
65 * and dma_unmap_???? routines are empty and are likely to stay this way.
66 * I decided to omit dma_unmap_??? calls because I don't want to add additional
67 * complexity just for the sake of following some abstract API, when it doesn't
68 * add any real benefit to the driver. I understand that this decision maybe
69 * controversial, but I really tried to make code API-correct and efficient
70 * at the same time and didn't come up with code I liked :(. --ebs
71 */
72
73#define DRV_NAME "emac"
74#define DRV_VERSION "3.54"
75#define DRV_DESC "PPC 4xx OCP EMAC driver"
76
77MODULE_DESCRIPTION(DRV_DESC);
78MODULE_AUTHOR
79 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>");
80MODULE_LICENSE("GPL");
81
82/*
83 * PPC64 doesn't (yet) have a cacheable_memcpy
84 */
85#ifdef CONFIG_PPC64
86#define cacheable_memcpy(d,s,n) memcpy((d),(s),(n))
87#endif
88
89/* minimum number of free TX descriptors required to wake up TX process */
90#define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4)
91
92/* If packet size is less than this number, we allocate small skb and copy packet
93 * contents into it instead of just sending original big skb up
94 */
3b3bceef 95#define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD
1d3bb996
DG		 96
97/* Since multiple EMACs share MDIO lines in various ways, we need
98 * to avoid re-using the same PHY ID in cases where the arch didn't
99 * setup precise phy_map entries
100 *
101 * XXX This is something that needs to be reworked as we can have multiple
102 * EMAC "sets" (multiple ASICs containing several EMACs) though we can
103 * probably require in that case to have explicit PHY IDs in the device-tree
104 */
105static u32 busy_phy_map;
106static DEFINE_MUTEX(emac_phy_map_lock);
107
108/* This is the wait queue used to wait on any event related to probe, that
109 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc...
110 */
111static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait);
112
113/* Having stable interface names is a doomed idea. However, it would be nice
114 * if we didn't have completely random interface names at boot too :-) It's
115 * just a matter of making everybody's life easier. Since we are doing
116 * threaded probing, it's a bit harder though. The base idea here is that
117 * we make up a list of all emacs in the device-tree before we register the
118 * driver. Every emac will then wait for the previous one in the list to
119 * initialize before itself. We should also keep that list ordered by
120 * cell_index.
121 * That list is only 4 entries long, meaning that additional EMACs don't
122 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased.
123 */
124
125#define EMAC_BOOT_LIST_SIZE 4
126static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE];
127
128/* How long should I wait for dependent devices ? */
129#define EMAC_PROBE_DEP_TIMEOUT (HZ * 5)
130
131/* I don't want to litter system log with timeout errors
132 * when we have brain-damaged PHY.
133 */
134static inline void emac_report_timeout_error(struct emac_instance *dev,
135 const char *error)
136{
11121e30 137 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX |
9e3cb294 138 EMAC_FTR_460EX_PHY_CLK_FIX |
11121e30
VB		 139 EMAC_FTR_440EP_PHY_CLK_FIX))
140 DBG(dev, "%s" NL, error);
141 else if (net_ratelimit())
61c7a080
GL		 142 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name,
143 error);
1d3bb996
DG		 144}
145
11121e30
VB		 146/* EMAC PHY clock workaround:
147 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX,
148 * which allows controlling each EMAC clock
149 */
150static inline void emac_rx_clk_tx(struct emac_instance *dev)
151{
152#ifdef CONFIG_PPC_DCR_NATIVE
153 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
154 dcri_clrset(SDR0, SDR0_MFR,
155 0, SDR0_MFR_ECS >> dev->cell_index);
156#endif
157}
158
159static inline void emac_rx_clk_default(struct emac_instance *dev)
160{
161#ifdef CONFIG_PPC_DCR_NATIVE
162 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX))
163 dcri_clrset(SDR0, SDR0_MFR,
164 SDR0_MFR_ECS >> dev->cell_index, 0);
165#endif
166}
167
1d3bb996
DG		 168/* PHY polling intervals */
169#define PHY_POLL_LINK_ON HZ
170#define PHY_POLL_LINK_OFF (HZ / 5)
171
172/* Graceful stop timeouts in us.
173 * We should allow up to 1 frame time (full-duplex, ignoring collisions)
174 */
175#define STOP_TIMEOUT_10 1230
176#define STOP_TIMEOUT_100 124
177#define STOP_TIMEOUT_1000 13
178#define STOP_TIMEOUT_1000_JUMBO 73
179
4373c932
PB		 180static unsigned char default_mcast_addr[] = {
181 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01
182};
183
1d3bb996
DG		 184/* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */
185static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = {
186 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum",
187 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom",
188 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu",
189 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet",
190 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error",
191 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range",
192 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun",
193 "rx_bad_packet", "rx_runt_packet", "rx_short_event",
194 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long",
195 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors",
196 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral",
197 "tx_bd_excessive_collisions", "tx_bd_late_collision",
198 "tx_bd_multple_collisions", "tx_bd_single_collision",
199 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe",
200 "tx_errors"
201};
202
203static irqreturn_t emac_irq(int irq, void *dev_instance);
204static void emac_clean_tx_ring(struct emac_instance *dev);
205static void __emac_set_multicast_list(struct emac_instance *dev);
206
207static inline int emac_phy_supports_gige(int phy_mode)
208{
209 return phy_mode == PHY_MODE_GMII ||
210 phy_mode == PHY_MODE_RGMII ||
9e3cb294 211 phy_mode == PHY_MODE_SGMII ||
1d3bb996
DG		 212 phy_mode == PHY_MODE_TBI ||
213 phy_mode == PHY_MODE_RTBI;
214}
215
216static inline int emac_phy_gpcs(int phy_mode)
217{
9e3cb294
VG		 218 return phy_mode == PHY_MODE_SGMII ||
219 phy_mode == PHY_MODE_TBI ||
1d3bb996
DG		 220 phy_mode == PHY_MODE_RTBI;
221}
222
223static inline void emac_tx_enable(struct emac_instance *dev)
224{
225 struct emac_regs __iomem *p = dev->emacp;
226 u32 r;
227
228 DBG(dev, "tx_enable" NL);
229
230 r = in_be32(&p->mr0);
231 if (!(r & EMAC_MR0_TXE))
232 out_be32(&p->mr0, r | EMAC_MR0_TXE);
233}
234
235static void emac_tx_disable(struct emac_instance *dev)
236{
237 struct emac_regs __iomem *p = dev->emacp;
238 u32 r;
239
240 DBG(dev, "tx_disable" NL);
241
242 r = in_be32(&p->mr0);
243 if (r & EMAC_MR0_TXE) {
244 int n = dev->stop_timeout;
245 out_be32(&p->mr0, r & ~EMAC_MR0_TXE);
246 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) {
247 udelay(1);
248 --n;
249 }
250 if (unlikely(!n))
251 emac_report_timeout_error(dev, "TX disable timeout");
252 }
253}
254
255static void emac_rx_enable(struct emac_instance *dev)
256{
257 struct emac_regs __iomem *p = dev->emacp;
258 u32 r;
259
260 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags)))
261 goto out;
262
263 DBG(dev, "rx_enable" NL);
264
265 r = in_be32(&p->mr0);
266 if (!(r & EMAC_MR0_RXE)) {
267 if (unlikely(!(r & EMAC_MR0_RXI))) {
268 /* Wait if previous async disable is still in progress */
269 int n = dev->stop_timeout;
270 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
271 udelay(1);
272 --n;
273 }
274 if (unlikely(!n))
275 emac_report_timeout_error(dev,
276 "RX disable timeout");
277 }
278 out_be32(&p->mr0, r | EMAC_MR0_RXE);
279 }
280 out:
281 ;
282}
283
284static void emac_rx_disable(struct emac_instance *dev)
285{
286 struct emac_regs __iomem *p = dev->emacp;
287 u32 r;
288
289 DBG(dev, "rx_disable" NL);
290
291 r = in_be32(&p->mr0);
292 if (r & EMAC_MR0_RXE) {
293 int n = dev->stop_timeout;
294 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
295 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) {
296 udelay(1);
297 --n;
298 }
299 if (unlikely(!n))
300 emac_report_timeout_error(dev, "RX disable timeout");
301 }
302}
303
304static inline void emac_netif_stop(struct emac_instance *dev)
305{
306 netif_tx_lock_bh(dev->ndev);
e308a5d8 307 netif_addr_lock(dev->ndev);
1d3bb996 308 dev->no_mcast = 1;
e308a5d8 309 netif_addr_unlock(dev->ndev);
1d3bb996
DG		 310 netif_tx_unlock_bh(dev->ndev);
311 dev->ndev->trans_start = jiffies; /* prevent tx timeout */
312 mal_poll_disable(dev->mal, &dev->commac);
313 netif_tx_disable(dev->ndev);
314}
315
316static inline void emac_netif_start(struct emac_instance *dev)
317{
318 netif_tx_lock_bh(dev->ndev);
e308a5d8 319 netif_addr_lock(dev->ndev);
1d3bb996
DG		 320 dev->no_mcast = 0;
321 if (dev->mcast_pending && netif_running(dev->ndev))
322 __emac_set_multicast_list(dev);
e308a5d8 323 netif_addr_unlock(dev->ndev);
1d3bb996
DG		 324 netif_tx_unlock_bh(dev->ndev);
325
326 netif_wake_queue(dev->ndev);
327
328 /* NOTE: unconditional netif_wake_queue is only appropriate
329 * so long as all callers are assured to have free tx slots
330 * (taken from tg3... though the case where that is wrong is
331 * not terribly harmful)
332 */
333 mal_poll_enable(dev->mal, &dev->commac);
334}
335
336static inline void emac_rx_disable_async(struct emac_instance *dev)
337{
338 struct emac_regs __iomem *p = dev->emacp;
339 u32 r;
340
341 DBG(dev, "rx_disable_async" NL);
342
343 r = in_be32(&p->mr0);
344 if (r & EMAC_MR0_RXE)
345 out_be32(&p->mr0, r & ~EMAC_MR0_RXE);
346}
347
348static int emac_reset(struct emac_instance *dev)
349{
350 struct emac_regs __iomem *p = dev->emacp;
351 int n = 20;
352
353 DBG(dev, "reset" NL);
354
355 if (!dev->reset_failed) {
356 /* 40x erratum suggests stopping RX channel before reset,
357 * we stop TX as well
358 */
359 emac_rx_disable(dev);
360 emac_tx_disable(dev);
361 }
362
9e3cb294 363#ifdef CONFIG_PPC_DCR_NATIVE
23fbb5a8
PG		 364 /*
365 * PPC460EX/GT Embedded Processor Advanced User's Manual
366 * section 28.10.1 Mode Register 0 (EMACx_MR0) states:
367 * Note: The PHY must provide a TX Clk in order to perform a soft reset
368 * of the EMAC. If none is present, select the internal clock
369 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1).
370 * After a soft reset, select the external clock.
371 */
372 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
373 if (dev->phy_address == 0xffffffff &&
374 dev->phy_map == 0xffffffff) {
375 /* No PHY: select internal loop clock before reset */
376 dcri_clrset(SDR0, SDR0_ETH_CFG,
377 0, SDR0_ETH_CFG_ECS << dev->cell_index);
378 } else {
379 /* PHY present: select external clock before reset */
380 dcri_clrset(SDR0, SDR0_ETH_CFG,
381 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
382 }
383 }
9e3cb294
VG		 384#endif
385
1d3bb996
DG		 386 out_be32(&p->mr0, EMAC_MR0_SRST);
387 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n)
388 --n;
389
9e3cb294 390#ifdef CONFIG_PPC_DCR_NATIVE
23fbb5a8
PG		 391 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
392 if (dev->phy_address == 0xffffffff &&
393 dev->phy_map == 0xffffffff) {
394 /* No PHY: restore external clock source after reset */
395 dcri_clrset(SDR0, SDR0_ETH_CFG,
396 SDR0_ETH_CFG_ECS << dev->cell_index, 0);
397 }
398 }
9e3cb294
VG		 399#endif
400
1d3bb996
DG		 401 if (n) {
402 dev->reset_failed = 0;
403 return 0;
404 } else {
405 emac_report_timeout_error(dev, "reset timeout");
406 dev->reset_failed = 1;
407 return -ETIMEDOUT;
408 }
409}
410
411static void emac_hash_mc(struct emac_instance *dev)
412{
05781ccd
GE		 413 const int regs = EMAC_XAHT_REGS(dev);
414 u32 *gaht_base = emac_gaht_base(dev);
415 u32 gaht_temp[regs];
22bedad3 416 struct netdev_hw_addr *ha;
05781ccd 417 int i;
1d3bb996 418
4cd24eaf 419 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev));
1d3bb996 420
05781ccd
GE		 421 memset(gaht_temp, 0, sizeof (gaht_temp));
422
22bedad3 423 netdev_for_each_mc_addr(ha, dev->ndev) {
05781ccd 424 int slot, reg, mask;
22bedad3 425 DBG2(dev, "mc %pM" NL, ha->addr);
1d3bb996 426
22bedad3
JP		 427 slot = EMAC_XAHT_CRC_TO_SLOT(dev,
428 ether_crc(ETH_ALEN, ha->addr));
05781ccd
GE		 429 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot);
430 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot);
431
432 gaht_temp[reg] |= mask;
1d3bb996 433 }
05781ccd
GE		 434
435 for (i = 0; i < regs; i++)
436 out_be32(gaht_base + i, gaht_temp[i]);
1d3bb996
DG		 437}
438
439static inline u32 emac_iff2rmr(struct net_device *ndev)
440{
441 struct emac_instance *dev = netdev_priv(ndev);
442 u32 r;
443
444 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE;
445
446 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
447 r |= EMAC4_RMR_BASE;
448 else
449 r |= EMAC_RMR_BASE;
450
451 if (ndev->flags & IFF_PROMISC)
452 r |= EMAC_RMR_PME;
05781ccd 453 else if (ndev->flags & IFF_ALLMULTI ||
4cd24eaf 454 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev)))
1d3bb996 455 r |= EMAC_RMR_PMME;
4cd24eaf 456 else if (!netdev_mc_empty(ndev))
1d3bb996
DG		 457 r |= EMAC_RMR_MAE;
458
ae5d3372
DD		 459 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
460 r &= ~EMAC4_RMR_MJS_MASK;
461 r |= EMAC4_RMR_MJS(ndev->mtu);
462 }
463
1d3bb996
DG		 464 return r;
465}
466
467static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
468{
469 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT;
470
471 DBG2(dev, "__emac_calc_base_mr1" NL);
472
473 switch(tx_size) {
474 case 2048:
475 ret |= EMAC_MR1_TFS_2K;
476 break;
477 default:
3201fce0 478 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
1d3bb996
DG		 479 dev->ndev->name, tx_size);
480 }
481
482 switch(rx_size) {
483 case 16384:
484 ret |= EMAC_MR1_RFS_16K;
485 break;
486 case 4096:
487 ret |= EMAC_MR1_RFS_4K;
488 break;
489 default:
490 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
491 dev->ndev->name, rx_size);
492 }
493
494 return ret;
495}
496
497static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
498{
499 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
4696c3c4 500 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
1d3bb996
DG		 501
502 DBG2(dev, "__emac4_calc_base_mr1" NL);
503
504 switch(tx_size) {
3201fce0
DM		 505 case 16384:
506 ret |= EMAC4_MR1_TFS_16K;
507 break;
1d3bb996
DG		 508 case 4096:
509 ret |= EMAC4_MR1_TFS_4K;
510 break;
511 case 2048:
512 ret |= EMAC4_MR1_TFS_2K;
513 break;
514 default:
3201fce0 515 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n",
1d3bb996
DG		 516 dev->ndev->name, tx_size);
517 }
518
519 switch(rx_size) {
520 case 16384:
521 ret |= EMAC4_MR1_RFS_16K;
522 break;
523 case 4096:
524 ret |= EMAC4_MR1_RFS_4K;
525 break;
526 case 2048:
527 ret |= EMAC4_MR1_RFS_2K;
528 break;
529 default:
530 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n",
531 dev->ndev->name, rx_size);
532 }
533
534 return ret;
535}
536
537static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
538{
539 return emac_has_feature(dev, EMAC_FTR_EMAC4) ?
540 __emac4_calc_base_mr1(dev, tx_size, rx_size) :
541 __emac_calc_base_mr1(dev, tx_size, rx_size);
542}
543
544static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size)
545{
546 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
547 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4;
548 else
549 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT;
550}
551
552static inline u32 emac_calc_rwmr(struct emac_instance *dev,
553 unsigned int low, unsigned int high)
554{
555 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
556 return (low << 22) | ( (high & 0x3ff) << 6);
557 else
558 return (low << 23) | ( (high & 0x1ff) << 7);
559}
560
561static int emac_configure(struct emac_instance *dev)
562{
563 struct emac_regs __iomem *p = dev->emacp;
564 struct net_device *ndev = dev->ndev;
911b237d 565 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
1d3bb996
DG		 566 u32 r, mr1 = 0;
567
568 DBG(dev, "configure" NL);
569
911b237d
BH		 570 if (!link) {
571 out_be32(&p->mr1, in_be32(&p->mr1)
572 | EMAC_MR1_FDE | EMAC_MR1_ILE);
573 udelay(100);
574 } else if (emac_reset(dev) < 0)
1d3bb996
DG		 575 return -ETIMEDOUT;
576
577 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
578 tah_reset(dev->tah_dev);
579
911b237d
BH		 580 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
581 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
1d3bb996
DG		 582
583 /* Default fifo sizes */
584 tx_size = dev->tx_fifo_size;
585 rx_size = dev->rx_fifo_size;
586
911b237d
BH		 587 /* No link, force loopback */
588 if (!link)
589 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
590
1d3bb996 591 /* Check for full duplex */
911b237d 592 else if (dev->phy.duplex == DUPLEX_FULL)
1d3bb996
DG		 593 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
594
595 /* Adjust fifo sizes, mr1 and timeouts based on link speed */
596 dev->stop_timeout = STOP_TIMEOUT_10;
597 switch (dev->phy.speed) {
598 case SPEED_1000:
599 if (emac_phy_gpcs(dev->phy.mode)) {
9e3cb294
VG		 600 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA(
601 (dev->phy.gpcs_address != 0xffffffff) ?
602 dev->phy.gpcs_address : dev->phy.address);
1d3bb996
DG		 603
604 /* Put some arbitrary OUI, Manuf & Rev IDs so we can
605 * identify this GPCS PHY later.
606 */
05781ccd 607 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef);
1d3bb996
DG		 608 } else
609 mr1 |= EMAC_MR1_MF_1000;
610
611 /* Extended fifo sizes */
612 tx_size = dev->tx_fifo_size_gige;
613 rx_size = dev->rx_fifo_size_gige;
614
615 if (dev->ndev->mtu > ETH_DATA_LEN) {
f34ebab6
SR		 616 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
617 mr1 |= EMAC4_MR1_JPSM;
618 else
619 mr1 |= EMAC_MR1_JPSM;
1d3bb996
DG		 620 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO;
621 } else
622 dev->stop_timeout = STOP_TIMEOUT_1000;
623 break;
624 case SPEED_100:
625 mr1 |= EMAC_MR1_MF_100;
626 dev->stop_timeout = STOP_TIMEOUT_100;
627 break;
628 default: /* make gcc happy */
629 break;
630 }
631
632 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
633 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
634 dev->phy.speed);
635 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
636 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
637
638 /* on 40x erratum forces us to NOT use integrated flow control,
639 * let's hope it works on 44x ;)
640 */
641 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) &&
642 dev->phy.duplex == DUPLEX_FULL) {
643 if (dev->phy.pause)
644 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP;
645 else if (dev->phy.asym_pause)
646 mr1 |= EMAC_MR1_APP;
647 }
648
649 /* Add base settings & fifo sizes & program MR1 */
650 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size);
651 out_be32(&p->mr1, mr1);
652
653 /* Set individual MAC address */
654 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]);
655 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) |
656 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) |
657 ndev->dev_addr[5]);
658
659 /* VLAN Tag Protocol ID */
660 out_be32(&p->vtpid, 0x8100);
661
662 /* Receive mode register */
663 r = emac_iff2rmr(ndev);
664 if (r & EMAC_RMR_MAE)
665 emac_hash_mc(dev);
666 out_be32(&p->rmr, r);
667
668 /* FIFOs thresholds */
669 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
670 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
671 tx_size / 2 / dev->fifo_entry_size);
672 else
673 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1,
674 tx_size / 2 / dev->fifo_entry_size);
675 out_be32(&p->tmr1, r);
676 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2));
677
678 /* PAUSE frame is sent when RX FIFO reaches its high-water mark,
679 there should be still enough space in FIFO to allow the our link
680 partner time to process this frame and also time to send PAUSE
681 frame itself.
682
683 Here is the worst case scenario for the RX FIFO "headroom"
684 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap):
685
686 1) One maximum-length frame on TX 1522 bytes
687 2) One PAUSE frame time 64 bytes
688 3) PAUSE frame decode time allowance 64 bytes
689 4) One maximum-length frame on RX 1522 bytes
690 5) Round-trip propagation delay of the link (100Mb) 15 bytes
691 ----------
692 3187 bytes
693
694 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes)
695 low-water mark to RX_FIFO_SIZE / 8 (512 bytes)
696 */
697 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size,
698 rx_size / 4 / dev->fifo_entry_size);
699 out_be32(&p->rwmr, r);
700
701 /* Set PAUSE timer to the maximum */
702 out_be32(&p->ptr, 0xffff);
703
704 /* IRQ sources */
705 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE |
706 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE |
707 EMAC_ISR_IRE | EMAC_ISR_TE;
708 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
709 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE |
710 EMAC4_ISR_RXOE | */;
711 out_be32(&p->iser, r);
712
713 /* We need to take GPCS PHY out of isolate mode after EMAC reset */
9e3cb294
VG		 714 if (emac_phy_gpcs(dev->phy.mode)) {
715 if (dev->phy.gpcs_address != 0xffffffff)
716 emac_mii_reset_gpcs(&dev->phy);
717 else
718 emac_mii_reset_phy(&dev->phy);
719 }
1d3bb996
DG		 720
721 return 0;
722}
723
724static void emac_reinitialize(struct emac_instance *dev)
725{
726 DBG(dev, "reinitialize" NL);
727
728 emac_netif_stop(dev);
729 if (!emac_configure(dev)) {
730 emac_tx_enable(dev);
731 emac_rx_enable(dev);
732 }
733 emac_netif_start(dev);
734}
735
736static void emac_full_tx_reset(struct emac_instance *dev)
737{
738 DBG(dev, "full_tx_reset" NL);
739
740 emac_tx_disable(dev);
741 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
742 emac_clean_tx_ring(dev);
743 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0;
744
745 emac_configure(dev);
746
747 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
748 emac_tx_enable(dev);
749 emac_rx_enable(dev);
750}
751
752static void emac_reset_work(struct work_struct *work)
753{
754 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work);
755
756 DBG(dev, "reset_work" NL);
757
758 mutex_lock(&dev->link_lock);
61dbcece
BH		 759 if (dev->opened) {
760 emac_netif_stop(dev);
761 emac_full_tx_reset(dev);
762 emac_netif_start(dev);
763 }
1d3bb996
DG		 764 mutex_unlock(&dev->link_lock);
765}
766
767static void emac_tx_timeout(struct net_device *ndev)
768{
769 struct emac_instance *dev = netdev_priv(ndev);
770
771 DBG(dev, "tx_timeout" NL);
772
773 schedule_work(&dev->reset_work);
774}
775
776
777static inline int emac_phy_done(struct emac_instance *dev, u32 stacr)
778{
779 int done = !!(stacr & EMAC_STACR_OC);
780
781 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
782 done = !done;
783
784 return done;
785};
786
787static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
788{
789 struct emac_regs __iomem *p = dev->emacp;
790 u32 r = 0;
791 int n, err = -ETIMEDOUT;
792
793 mutex_lock(&dev->mdio_lock);
794
795 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg);
796
797 /* Enable proper MDIO port */
798 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
799 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
800 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
801 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
802
803 /* Wait for management interface to become idle */
cca87c18 804 n = 20;
1d3bb996
DG		 805 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
806 udelay(1);
807 if (!--n) {
808 DBG2(dev, " -> timeout wait idle\n");
809 goto bail;
810 }
811 }
812
813 /* Issue read command */
814 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
815 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
816 else
817 r = EMAC_STACR_BASE(dev->opb_bus_freq);
818 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
819 r |= EMAC_STACR_OC;
bff713b5 820 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
1d3bb996
DG		 821 r |= EMACX_STACR_STAC_READ;
822 else
823 r |= EMAC_STACR_STAC_READ;
824 r |= (reg & EMAC_STACR_PRA_MASK)
825 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT);
826 out_be32(&p->stacr, r);
827
828 /* Wait for read to complete */
cca87c18 829 n = 200;
1d3bb996
DG		 830 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) {
831 udelay(1);
832 if (!--n) {
833 DBG2(dev, " -> timeout wait complete\n");
834 goto bail;
835 }
836 }
837
838 if (unlikely(r & EMAC_STACR_PHYE)) {
839 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg);
840 err = -EREMOTEIO;
841 goto bail;
842 }
843
844 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK);
845
846 DBG2(dev, "mdio_read -> %04x" NL, r);
847 err = 0;
848 bail:
849 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
850 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
851 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
852 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
853 mutex_unlock(&dev->mdio_lock);
854
855 return err == 0 ? r : err;
856}
857
858static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
859 u16 val)
860{
861 struct emac_regs __iomem *p = dev->emacp;
862 u32 r = 0;
863 int n, err = -ETIMEDOUT;
864
865 mutex_lock(&dev->mdio_lock);
866
867 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val);
868
869 /* Enable proper MDIO port */
870 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
871 zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
872 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
873 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
874
875 /* Wait for management interface to be idle */
cca87c18 876 n = 20;
1d3bb996
DG		 877 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
878 udelay(1);
879 if (!--n) {
880 DBG2(dev, " -> timeout wait idle\n");
881 goto bail;
882 }
883 }
884
885 /* Issue write command */
886 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
887 r = EMAC4_STACR_BASE(dev->opb_bus_freq);
888 else
889 r = EMAC_STACR_BASE(dev->opb_bus_freq);
890 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
891 r |= EMAC_STACR_OC;
bff713b5 892 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
1d3bb996
DG		 893 r |= EMACX_STACR_STAC_WRITE;
894 else
895 r |= EMAC_STACR_STAC_WRITE;
896 r |= (reg & EMAC_STACR_PRA_MASK) |
897 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
898 (val << EMAC_STACR_PHYD_SHIFT);
899 out_be32(&p->stacr, r);
900
901 /* Wait for write to complete */
cca87c18 902 n = 200;
1d3bb996
DG		 903 while (!emac_phy_done(dev, in_be32(&p->stacr))) {
904 udelay(1);
905 if (!--n) {
906 DBG2(dev, " -> timeout wait complete\n");
907 goto bail;
908 }
909 }
910 err = 0;
911 bail:
912 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
913 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
914 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
915 zmii_put_mdio(dev->zmii_dev, dev->zmii_port);
916 mutex_unlock(&dev->mdio_lock);
917}
918
919static int emac_mdio_read(struct net_device *ndev, int id, int reg)
920{
921 struct emac_instance *dev = netdev_priv(ndev);
922 int res;
923
9e3cb294
VG		 924 res = __emac_mdio_read((dev->mdio_instance &&
925 dev->phy.gpcs_address != id) ?
926 dev->mdio_instance : dev,
1d3bb996
DG		 927 (u8) id, (u8) reg);
928 return res;
929}
930
931static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val)
932{
933 struct emac_instance *dev = netdev_priv(ndev);
934
9e3cb294
VG		 935 __emac_mdio_write((dev->mdio_instance &&
936 dev->phy.gpcs_address != id) ?
937 dev->mdio_instance : dev,
1d3bb996
DG		 938 (u8) id, (u8) reg, (u16) val);
939}
940
941/* Tx lock BH */
942static void __emac_set_multicast_list(struct emac_instance *dev)
943{
944 struct emac_regs __iomem *p = dev->emacp;
945 u32 rmr = emac_iff2rmr(dev->ndev);
946
947 DBG(dev, "__multicast %08x" NL, rmr);
948
949 /* I decided to relax register access rules here to avoid
950 * full EMAC reset.
951 *
952 * There is a real problem with EMAC4 core if we use MWSW_001 bit
953 * in MR1 register and do a full EMAC reset.
954 * One TX BD status update is delayed and, after EMAC reset, it
955 * never happens, resulting in TX hung (it'll be recovered by TX
956 * timeout handler eventually, but this is just gross).
957 * So we either have to do full TX reset or try to cheat here :)
958 *
959 * The only required change is to RX mode register, so I *think* all
960 * we need is just to stop RX channel. This seems to work on all
961 * tested SoCs. --ebs
962 *
963 * If we need the full reset, we might just trigger the workqueue
964 * and do it async... a bit nasty but should work --BenH
965 */
966 dev->mcast_pending = 0;
967 emac_rx_disable(dev);
968 if (rmr & EMAC_RMR_MAE)
969 emac_hash_mc(dev);
970 out_be32(&p->rmr, rmr);
971 emac_rx_enable(dev);
972}
973
974/* Tx lock BH */
975static void emac_set_multicast_list(struct net_device *ndev)
976{
977 struct emac_instance *dev = netdev_priv(ndev);
978
979 DBG(dev, "multicast" NL);
980
981 BUG_ON(!netif_running(dev->ndev));
982
983 if (dev->no_mcast) {
984 dev->mcast_pending = 1;
985 return;
986 }
987 __emac_set_multicast_list(dev);
988}
989
990static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu)
991{
992 int rx_sync_size = emac_rx_sync_size(new_mtu);
993 int rx_skb_size = emac_rx_skb_size(new_mtu);
994 int i, ret = 0;
ae5d3372 995 int mr1_jumbo_bit_change = 0;
1d3bb996
DG		 996
997 mutex_lock(&dev->link_lock);
998 emac_netif_stop(dev);
999 emac_rx_disable(dev);
1000 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1001
1002 if (dev->rx_sg_skb) {
1003 ++dev->estats.rx_dropped_resize;
1004 dev_kfree_skb(dev->rx_sg_skb);
1005 dev->rx_sg_skb = NULL;
1006 }
1007
1008 /* Make a first pass over RX ring and mark BDs ready, dropping
1009 * non-processed packets on the way. We need this as a separate pass
1010 * to simplify error recovery in the case of allocation failure later.
1011 */
1012 for (i = 0; i < NUM_RX_BUFF; ++i) {
1013 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST)
1014 ++dev->estats.rx_dropped_resize;
1015
1016 dev->rx_desc[i].data_len = 0;
1017 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY |
1018 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1019 }
1020
1021 /* Reallocate RX ring only if bigger skb buffers are required */
1022 if (rx_skb_size <= dev->rx_skb_size)
1023 goto skip;
1024
1025 /* Second pass, allocate new skbs */
1026 for (i = 0; i < NUM_RX_BUFF; ++i) {
1027 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC);
1028 if (!skb) {
1029 ret = -ENOMEM;
1030 goto oom;
1031 }
1032
1033 BUG_ON(!dev->rx_skb[i]);
1034 dev_kfree_skb(dev->rx_skb[i]);
1035
1036 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1037 dev->rx_desc[i].data_ptr =
1038 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size,
1039 DMA_FROM_DEVICE) + 2;
1040 dev->rx_skb[i] = skb;
1041 }
1042 skip:
1043 /* Check if we need to change "Jumbo" bit in MR1 */
ae5d3372
DD		 1044 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) {
1045 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ||
1046 (dev->ndev->mtu > ETH_DATA_LEN);
1047 } else {
1048 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^
1049 (dev->ndev->mtu > ETH_DATA_LEN);
1050 }
1051
1052 if (mr1_jumbo_bit_change) {
1d3bb996
DG		 1053 /* This is to prevent starting RX channel in emac_rx_enable() */
1054 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1055
1056 dev->ndev->mtu = new_mtu;
1057 emac_full_tx_reset(dev);
1058 }
1059
1060 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu));
1061 oom:
1062 /* Restart RX */
1063 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1064 dev->rx_slot = 0;
1065 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1066 emac_rx_enable(dev);
1067 emac_netif_start(dev);
1068 mutex_unlock(&dev->link_lock);
1069
1070 return ret;
1071}
1072
1073/* Process ctx, rtnl_lock semaphore */
1074static int emac_change_mtu(struct net_device *ndev, int new_mtu)
1075{
1076 struct emac_instance *dev = netdev_priv(ndev);
1077 int ret = 0;
1078
1079 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu)
1080 return -EINVAL;
1081
1082 DBG(dev, "change_mtu(%d)" NL, new_mtu);
1083
1084 if (netif_running(ndev)) {
421f91d2 1085 /* Check if we really need to reinitialize RX ring */
1d3bb996
DG		 1086 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu))
1087 ret = emac_resize_rx_ring(dev, new_mtu);
1088 }
1089
1090 if (!ret) {
1091 ndev->mtu = new_mtu;
1092 dev->rx_skb_size = emac_rx_skb_size(new_mtu);
1093 dev->rx_sync_size = emac_rx_sync_size(new_mtu);
1094 }
1095
1096 return ret;
1097}
1098
1099static void emac_clean_tx_ring(struct emac_instance *dev)
1100{
1101 int i;
1102
1103 for (i = 0; i < NUM_TX_BUFF; ++i) {
1104 if (dev->tx_skb[i]) {
1105 dev_kfree_skb(dev->tx_skb[i]);
1106 dev->tx_skb[i] = NULL;
1107 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY)
1108 ++dev->estats.tx_dropped;
1109 }
1110 dev->tx_desc[i].ctrl = 0;
1111 dev->tx_desc[i].data_ptr = 0;
1112 }
1113}
1114
1115static void emac_clean_rx_ring(struct emac_instance *dev)
1116{
1117 int i;
1118
1119 for (i = 0; i < NUM_RX_BUFF; ++i)
1120 if (dev->rx_skb[i]) {
1121 dev->rx_desc[i].ctrl = 0;
1122 dev_kfree_skb(dev->rx_skb[i]);
1123 dev->rx_skb[i] = NULL;
1124 dev->rx_desc[i].data_ptr = 0;
1125 }
1126
1127 if (dev->rx_sg_skb) {
1128 dev_kfree_skb(dev->rx_sg_skb);
1129 dev->rx_sg_skb = NULL;
1130 }
1131}
1132
1133static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot,
1134 gfp_t flags)
1135{
1136 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags);
1137 if (unlikely(!skb))
1138 return -ENOMEM;
1139
1140 dev->rx_skb[slot] = skb;
1141 dev->rx_desc[slot].data_len = 0;
1142
1143 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2);
1144 dev->rx_desc[slot].data_ptr =
1145 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size,
1146 DMA_FROM_DEVICE) + 2;
1147 wmb();
1148 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1149 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1150
1151 return 0;
1152}
1153
1154static void emac_print_link_status(struct emac_instance *dev)
1155{
1156 if (netif_carrier_ok(dev->ndev))
1157 printk(KERN_INFO "%s: link is up, %d %s%s\n",
1158 dev->ndev->name, dev->phy.speed,
1159 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX",
1160 dev->phy.pause ? ", pause enabled" :
1161 dev->phy.asym_pause ? ", asymmetric pause enabled" : "");
1162 else
1163 printk(KERN_INFO "%s: link is down\n", dev->ndev->name);
1164}
1165
1166/* Process ctx, rtnl_lock semaphore */
1167static int emac_open(struct net_device *ndev)
1168{
1169 struct emac_instance *dev = netdev_priv(ndev);
1170 int err, i;
1171
1172 DBG(dev, "open" NL);
1173
1174 /* Setup error IRQ handler */
1175 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev);
1176 if (err) {
1177 printk(KERN_ERR "%s: failed to request IRQ %d\n",
1178 ndev->name, dev->emac_irq);
1179 return err;
1180 }
1181
1182 /* Allocate RX ring */
1183 for (i = 0; i < NUM_RX_BUFF; ++i)
1184 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) {
1185 printk(KERN_ERR "%s: failed to allocate RX ring\n",
1186 ndev->name);
1187 goto oom;
1188 }
1189
1190 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0;
1191 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1192 dev->rx_sg_skb = NULL;
1193
1194 mutex_lock(&dev->link_lock);
61dbcece 1195 dev->opened = 1;
1d3bb996 1196
61dbcece 1197 /* Start PHY polling now.
1d3bb996
DG		 1198 */
1199 if (dev->phy.address >= 0) {
1200 int link_poll_interval;
1201 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1202 dev->phy.def->ops->read_link(&dev->phy);
11121e30 1203 emac_rx_clk_default(dev);
1d3bb996
DG		 1204 netif_carrier_on(dev->ndev);
1205 link_poll_interval = PHY_POLL_LINK_ON;
1206 } else {
11121e30 1207 emac_rx_clk_tx(dev);
1d3bb996
DG		 1208 netif_carrier_off(dev->ndev);
1209 link_poll_interval = PHY_POLL_LINK_OFF;
1210 }
1211 dev->link_polling = 1;
1212 wmb();
1213 schedule_delayed_work(&dev->link_work, link_poll_interval);
1214 emac_print_link_status(dev);
1215 } else
1216 netif_carrier_on(dev->ndev);
1217
e8296582 1218 /* Required for Pause packet support in EMAC */
22bedad3 1219 dev_mc_add_global(ndev, default_mcast_addr);
e8296582 1220
1d3bb996
DG		 1221 emac_configure(dev);
1222 mal_poll_add(dev->mal, &dev->commac);
1223 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan);
1224 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu));
1225 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1226 emac_tx_enable(dev);
1227 emac_rx_enable(dev);
1228 emac_netif_start(dev);
1229
1230 mutex_unlock(&dev->link_lock);
1231
1232 return 0;
1233 oom:
1234 emac_clean_rx_ring(dev);
1235 free_irq(dev->emac_irq, dev);
1236
1237 return -ENOMEM;
1238}
1239
1240/* BHs disabled */
1241#if 0
1242static int emac_link_differs(struct emac_instance *dev)
1243{
1244 u32 r = in_be32(&dev->emacp->mr1);
1245
1246 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF;
1247 int speed, pause, asym_pause;
1248
1249 if (r & EMAC_MR1_MF_1000)
1250 speed = SPEED_1000;
1251 else if (r & EMAC_MR1_MF_100)
1252 speed = SPEED_100;
1253 else
1254 speed = SPEED_10;
1255
1256 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) {
1257 case (EMAC_MR1_EIFC | EMAC_MR1_APP):
1258 pause = 1;
1259 asym_pause = 0;
1260 break;
1261 case EMAC_MR1_APP:
1262 pause = 0;
1263 asym_pause = 1;
1264 break;
1265 default:
1266 pause = asym_pause = 0;
1267 }
1268 return speed != dev->phy.speed || duplex != dev->phy.duplex ||
1269 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause;
1270}
1271#endif
1272
1273static void emac_link_timer(struct work_struct *work)
1274{
1275 struct emac_instance *dev =
10fd9d7e 1276 container_of(to_delayed_work(work),
1d3bb996
DG		 1277 struct emac_instance, link_work);
1278 int link_poll_interval;
1279
1280 mutex_lock(&dev->link_lock);
1d3bb996
DG		 1281 DBG2(dev, "link timer" NL);
1282
61dbcece
BH		 1283 if (!dev->opened)
1284 goto bail;
1285
1d3bb996
DG		 1286 if (dev->phy.def->ops->poll_link(&dev->phy)) {
1287 if (!netif_carrier_ok(dev->ndev)) {
11121e30 1288 emac_rx_clk_default(dev);
1d3bb996
DG		 1289 /* Get new link parameters */
1290 dev->phy.def->ops->read_link(&dev->phy);
1291
1292 netif_carrier_on(dev->ndev);
1293 emac_netif_stop(dev);
1294 emac_full_tx_reset(dev);
1295 emac_netif_start(dev);
1296 emac_print_link_status(dev);
1297 }
1298 link_poll_interval = PHY_POLL_LINK_ON;
1299 } else {
1300 if (netif_carrier_ok(dev->ndev)) {
11121e30 1301 emac_rx_clk_tx(dev);
1d3bb996
DG		 1302 netif_carrier_off(dev->ndev);
1303 netif_tx_disable(dev->ndev);
911b237d 1304 emac_reinitialize(dev);
1d3bb996
DG		 1305 emac_print_link_status(dev);
1306 }
1307 link_poll_interval = PHY_POLL_LINK_OFF;
1308 }
1309 schedule_delayed_work(&dev->link_work, link_poll_interval);
61dbcece 1310 bail:
1d3bb996
DG		 1311 mutex_unlock(&dev->link_lock);
1312}
1313
1314static void emac_force_link_update(struct emac_instance *dev)
1315{
1316 netif_carrier_off(dev->ndev);
61dbcece 1317 smp_rmb();
1d3bb996 1318 if (dev->link_polling) {
afe2c511 1319 cancel_delayed_work_sync(&dev->link_work);
1d3bb996
DG		 1320 if (dev->link_polling)
1321 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF);
1322 }
1323}
1324
1325/* Process ctx, rtnl_lock semaphore */
1326static int emac_close(struct net_device *ndev)
1327{
1328 struct emac_instance *dev = netdev_priv(ndev);
1329
1330 DBG(dev, "close" NL);
1331
61dbcece
BH		 1332 if (dev->phy.address >= 0) {
1333 dev->link_polling = 0;
afe2c511 1334 cancel_delayed_work_sync(&dev->link_work);
61dbcece
BH		 1335 }
1336 mutex_lock(&dev->link_lock);
1d3bb996 1337 emac_netif_stop(dev);
61dbcece
BH		 1338 dev->opened = 0;
1339 mutex_unlock(&dev->link_lock);
1d3bb996
DG		 1340
1341 emac_rx_disable(dev);
1342 emac_tx_disable(dev);
1343 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan);
1344 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan);
1345 mal_poll_del(dev->mal, &dev->commac);
1346
1347 emac_clean_tx_ring(dev);
1348 emac_clean_rx_ring(dev);
1349
1350 free_irq(dev->emac_irq, dev);
1351
d3b325f9
PG		 1352 netif_carrier_off(ndev);
1353
1d3bb996
DG		 1354 return 0;
1355}
1356
1357static inline u16 emac_tx_csum(struct emac_instance *dev,
1358 struct sk_buff *skb)
1359{
e66f4168
VB		 1360 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
1361 (skb->ip_summed == CHECKSUM_PARTIAL)) {
1d3bb996
DG		 1362 ++dev->stats.tx_packets_csum;
1363 return EMAC_TX_CTRL_TAH_CSUM;
1364 }
1365 return 0;
1366}
1367
1368static inline int emac_xmit_finish(struct emac_instance *dev, int len)
1369{
1370 struct emac_regs __iomem *p = dev->emacp;
1371 struct net_device *ndev = dev->ndev;
1372
1373 /* Send the packet out. If the if makes a significant perf
1374 * difference, then we can store the TMR0 value in "dev"
1375 * instead
1376 */
1377 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
1d3bb996 1378 out_be32(&p->tmr0, EMAC4_TMR0_XMIT);
07c2c76e 1379 else
1380 out_be32(&p->tmr0, EMAC_TMR0_XMIT);
1d3bb996
DG		 1381
1382 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) {
1383 netif_stop_queue(ndev);
1384 DBG2(dev, "stopped TX queue" NL);
1385 }
1386
1387 ndev->trans_start = jiffies;
1388 ++dev->stats.tx_packets;
1389 dev->stats.tx_bytes += len;
1390
ec634fe3 1391 return NETDEV_TX_OK;
1d3bb996
DG		 1392}
1393
1394/* Tx lock BH */
1395static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1396{
1397 struct emac_instance *dev = netdev_priv(ndev);
1398 unsigned int len = skb->len;
1399 int slot;
1400
1401 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1402 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb);
1403
1404 slot = dev->tx_slot++;
1405 if (dev->tx_slot == NUM_TX_BUFF) {
1406 dev->tx_slot = 0;
1407 ctrl |= MAL_TX_CTRL_WRAP;
1408 }
1409
1410 DBG2(dev, "xmit(%u) %d" NL, len, slot);
1411
1412 dev->tx_skb[slot] = skb;
1413 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev,
1414 skb->data, len,
1415 DMA_TO_DEVICE);
1416 dev->tx_desc[slot].data_len = (u16) len;
1417 wmb();
1418 dev->tx_desc[slot].ctrl = ctrl;
1419
1420 return emac_xmit_finish(dev, len);
1421}
1422
1d3bb996
DG		 1423static inline int emac_xmit_split(struct emac_instance *dev, int slot,
1424 u32 pd, int len, int last, u16 base_ctrl)
1425{
1426 while (1) {
1427 u16 ctrl = base_ctrl;
1428 int chunk = min(len, MAL_MAX_TX_SIZE);
1429 len -= chunk;
1430
1431 slot = (slot + 1) % NUM_TX_BUFF;
1432
1433 if (last && !len)
1434 ctrl |= MAL_TX_CTRL_LAST;
1435 if (slot == NUM_TX_BUFF - 1)
1436 ctrl |= MAL_TX_CTRL_WRAP;
1437
1438 dev->tx_skb[slot] = NULL;
1439 dev->tx_desc[slot].data_ptr = pd;
1440 dev->tx_desc[slot].data_len = (u16) chunk;
1441 dev->tx_desc[slot].ctrl = ctrl;
1442 ++dev->tx_cnt;
1443
1444 if (!len)
1445 break;
1446
1447 pd += chunk;
1448 }
1449 return slot;
1450}
1451
1452/* Tx lock BH disabled (SG version for TAH equipped EMACs) */
1453static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev)
1454{
1455 struct emac_instance *dev = netdev_priv(ndev);
1456 int nr_frags = skb_shinfo(skb)->nr_frags;
1457 int len = skb->len, chunk;
1458 int slot, i;
1459 u16 ctrl;
1460 u32 pd;
1461
1462 /* This is common "fast" path */
1463 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE))
1464 return emac_start_xmit(skb, ndev);
1465
1466 len -= skb->data_len;
1467
1468 /* Note, this is only an *estimation*, we can still run out of empty
1469 * slots because of the additional fragmentation into
1470 * MAL_MAX_TX_SIZE-sized chunks
1471 */
1472 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF))
1473 goto stop_queue;
1474
1475 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY |
1476 emac_tx_csum(dev, skb);
1477 slot = dev->tx_slot;
1478
1479 /* skb data */
1480 dev->tx_skb[slot] = NULL;
1481 chunk = min(len, MAL_MAX_TX_SIZE);
1482 dev->tx_desc[slot].data_ptr = pd =
1483 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE);
1484 dev->tx_desc[slot].data_len = (u16) chunk;
1485 len -= chunk;
1486 if (unlikely(len))
1487 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags,
1488 ctrl);
1489 /* skb fragments */
1490 for (i = 0; i < nr_frags; ++i) {
1491 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
9e903e08 1492 len = skb_frag_size(frag);
1d3bb996
DG		 1493
1494 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF))
1495 goto undo_frame;
1496
f8f114c2
IC		 1497 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len,
1498 DMA_TO_DEVICE);
1d3bb996
DG		 1499
1500 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1,
1501 ctrl);
1502 }
1503
1504 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot);
1505
1506 /* Attach skb to the last slot so we don't release it too early */
1507 dev->tx_skb[slot] = skb;
1508
1509 /* Send the packet out */
1510 if (dev->tx_slot == NUM_TX_BUFF - 1)
1511 ctrl |= MAL_TX_CTRL_WRAP;
1512 wmb();
1513 dev->tx_desc[dev->tx_slot].ctrl = ctrl;
1514 dev->tx_slot = (slot + 1) % NUM_TX_BUFF;
1515
1516 return emac_xmit_finish(dev, skb->len);
1517
1518 undo_frame:
1519 /* Well, too bad. Our previous estimation was overly optimistic.
1520 * Undo everything.
1521 */
1522 while (slot != dev->tx_slot) {
1523 dev->tx_desc[slot].ctrl = 0;
1524 --dev->tx_cnt;
1525 if (--slot < 0)
1526 slot = NUM_TX_BUFF - 1;
1527 }
1528 ++dev->estats.tx_undo;
1529
1530 stop_queue:
1531 netif_stop_queue(ndev);
1532 DBG2(dev, "stopped TX queue" NL);
5b548140 1533 return NETDEV_TX_BUSY;
1d3bb996 1534}
1d3bb996
DG		 1535
1536/* Tx lock BHs */
1537static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl)
1538{
1539 struct emac_error_stats *st = &dev->estats;
1540
1541 DBG(dev, "BD TX error %04x" NL, ctrl);
1542
1543 ++st->tx_bd_errors;
1544 if (ctrl & EMAC_TX_ST_BFCS)
1545 ++st->tx_bd_bad_fcs;
1546 if (ctrl & EMAC_TX_ST_LCS)
1547 ++st->tx_bd_carrier_loss;
1548 if (ctrl & EMAC_TX_ST_ED)
1549 ++st->tx_bd_excessive_deferral;
1550 if (ctrl & EMAC_TX_ST_EC)
1551 ++st->tx_bd_excessive_collisions;
1552 if (ctrl & EMAC_TX_ST_LC)
1553 ++st->tx_bd_late_collision;
1554 if (ctrl & EMAC_TX_ST_MC)
1555 ++st->tx_bd_multple_collisions;
1556 if (ctrl & EMAC_TX_ST_SC)
1557 ++st->tx_bd_single_collision;
1558 if (ctrl & EMAC_TX_ST_UR)
1559 ++st->tx_bd_underrun;
1560 if (ctrl & EMAC_TX_ST_SQE)
1561 ++st->tx_bd_sqe;
1562}
1563
1564static void emac_poll_tx(void *param)
1565{
1566 struct emac_instance *dev = param;
1567 u32 bad_mask;
1568
1569 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot);
1570
1571 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
1572 bad_mask = EMAC_IS_BAD_TX_TAH;
1573 else
1574 bad_mask = EMAC_IS_BAD_TX;
1575
1576 netif_tx_lock_bh(dev->ndev);
1577 if (dev->tx_cnt) {
1578 u16 ctrl;
1579 int slot = dev->ack_slot, n = 0;
1580 again:
1581 ctrl = dev->tx_desc[slot].ctrl;
1582 if (!(ctrl & MAL_TX_CTRL_READY)) {
1583 struct sk_buff *skb = dev->tx_skb[slot];
1584 ++n;
1585
1586 if (skb) {
1587 dev_kfree_skb(skb);
1588 dev->tx_skb[slot] = NULL;
1589 }
1590 slot = (slot + 1) % NUM_TX_BUFF;
1591
1592 if (unlikely(ctrl & bad_mask))
1593 emac_parse_tx_error(dev, ctrl);
1594
1595 if (--dev->tx_cnt)
1596 goto again;
1597 }
1598 if (n) {
1599 dev->ack_slot = slot;
1600 if (netif_queue_stopped(dev->ndev) &&
1601 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH)
1602 netif_wake_queue(dev->ndev);
1603
1604 DBG2(dev, "tx %d pkts" NL, n);
1605 }
1606 }
1607 netif_tx_unlock_bh(dev->ndev);
1608}
1609
1610static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot,
1611 int len)
1612{
1613 struct sk_buff *skb = dev->rx_skb[slot];
1614
1615 DBG2(dev, "recycle %d %d" NL, slot, len);
1616
1617 if (len)
1618 dma_map_single(&dev->ofdev->dev, skb->data - 2,
1619 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE);
1620
1621 dev->rx_desc[slot].data_len = 0;
1622 wmb();
1623 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY |
1624 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
1625}
1626
1627static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl)
1628{
1629 struct emac_error_stats *st = &dev->estats;
1630
1631 DBG(dev, "BD RX error %04x" NL, ctrl);
1632
1633 ++st->rx_bd_errors;
1634 if (ctrl & EMAC_RX_ST_OE)
1635 ++st->rx_bd_overrun;
1636 if (ctrl & EMAC_RX_ST_BP)
1637 ++st->rx_bd_bad_packet;
1638 if (ctrl & EMAC_RX_ST_RP)
1639 ++st->rx_bd_runt_packet;
1640 if (ctrl & EMAC_RX_ST_SE)
1641 ++st->rx_bd_short_event;
1642 if (ctrl & EMAC_RX_ST_AE)
1643 ++st->rx_bd_alignment_error;
1644 if (ctrl & EMAC_RX_ST_BFCS)
1645 ++st->rx_bd_bad_fcs;
1646 if (ctrl & EMAC_RX_ST_PTL)
1647 ++st->rx_bd_packet_too_long;
1648 if (ctrl & EMAC_RX_ST_ORE)
1649 ++st->rx_bd_out_of_range;
1650 if (ctrl & EMAC_RX_ST_IRE)
1651 ++st->rx_bd_in_range;
1652}
1653
1654static inline void emac_rx_csum(struct emac_instance *dev,
1655 struct sk_buff *skb, u16 ctrl)
1656{
3b3bceef 1657#ifdef CONFIG_IBM_EMAC_TAH
1d3bb996
DG		 1658 if (!ctrl && dev->tah_dev) {
1659 skb->ip_summed = CHECKSUM_UNNECESSARY;
1660 ++dev->stats.rx_packets_csum;
1661 }
1662#endif
1663}
1664
1665static inline int emac_rx_sg_append(struct emac_instance *dev, int slot)
1666{
1667 if (likely(dev->rx_sg_skb != NULL)) {
1668 int len = dev->rx_desc[slot].data_len;
1669 int tot_len = dev->rx_sg_skb->len + len;
1670
1671 if (unlikely(tot_len + 2 > dev->rx_skb_size)) {
1672 ++dev->estats.rx_dropped_mtu;
1673 dev_kfree_skb(dev->rx_sg_skb);
1674 dev->rx_sg_skb = NULL;
1675 } else {
bef1bc95 1676 cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb),
1d3bb996
DG		 1677 dev->rx_skb[slot]->data, len);
1678 skb_put(dev->rx_sg_skb, len);
1679 emac_recycle_rx_skb(dev, slot, len);
1680 return 0;
1681 }
1682 }
1683 emac_recycle_rx_skb(dev, slot, 0);
1684 return -1;
1685}
1686
1687/* NAPI poll context */
1688static int emac_poll_rx(void *param, int budget)
1689{
1690 struct emac_instance *dev = param;
1691 int slot = dev->rx_slot, received = 0;
1692
1693 DBG2(dev, "poll_rx(%d)" NL, budget);
1694
1695 again:
1696 while (budget > 0) {
1697 int len;
1698 struct sk_buff *skb;
1699 u16 ctrl = dev->rx_desc[slot].ctrl;
1700
1701 if (ctrl & MAL_RX_CTRL_EMPTY)
1702 break;
1703
1704 skb = dev->rx_skb[slot];
1705 mb();
1706 len = dev->rx_desc[slot].data_len;
1707
1708 if (unlikely(!MAL_IS_SINGLE_RX(ctrl)))
1709 goto sg;
1710
1711 ctrl &= EMAC_BAD_RX_MASK;
1712 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1713 emac_parse_rx_error(dev, ctrl);
1714 ++dev->estats.rx_dropped_error;
1715 emac_recycle_rx_skb(dev, slot, 0);
1716 len = 0;
1717 goto next;
1718 }
6c688f42
SN		 1719
1720 if (len < ETH_HLEN) {
1721 ++dev->estats.rx_dropped_stack;
1722 emac_recycle_rx_skb(dev, slot, len);
1723 goto next;
1724 }
1d3bb996
DG		 1725
1726 if (len && len < EMAC_RX_COPY_THRESH) {
1727 struct sk_buff *copy_skb =
1728 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC);
1729 if (unlikely(!copy_skb))
1730 goto oom;
1731
1732 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2);
1733 cacheable_memcpy(copy_skb->data - 2, skb->data - 2,
1734 len + 2);
1735 emac_recycle_rx_skb(dev, slot, len);
1736 skb = copy_skb;
1737 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC)))
1738 goto oom;
1739
1740 skb_put(skb, len);
1741 push_packet:
1d3bb996
DG		 1742 skb->protocol = eth_type_trans(skb, dev->ndev);
1743 emac_rx_csum(dev, skb, ctrl);
1744
1745 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP))
1746 ++dev->estats.rx_dropped_stack;
1747 next:
1748 ++dev->stats.rx_packets;
1749 skip:
1750 dev->stats.rx_bytes += len;
1751 slot = (slot + 1) % NUM_RX_BUFF;
1752 --budget;
1753 ++received;
1754 continue;
1755 sg:
1756 if (ctrl & MAL_RX_CTRL_FIRST) {
1757 BUG_ON(dev->rx_sg_skb);
1758 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) {
1759 DBG(dev, "rx OOM %d" NL, slot);
1760 ++dev->estats.rx_dropped_oom;
1761 emac_recycle_rx_skb(dev, slot, 0);
1762 } else {
1763 dev->rx_sg_skb = skb;
1764 skb_put(skb, len);
1765 }
1766 } else if (!emac_rx_sg_append(dev, slot) &&
1767 (ctrl & MAL_RX_CTRL_LAST)) {
1768
1769 skb = dev->rx_sg_skb;
1770 dev->rx_sg_skb = NULL;
1771
1772 ctrl &= EMAC_BAD_RX_MASK;
1773 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) {
1774 emac_parse_rx_error(dev, ctrl);
1775 ++dev->estats.rx_dropped_error;
1776 dev_kfree_skb(skb);
1777 len = 0;
1778 } else
1779 goto push_packet;
1780 }
1781 goto skip;
1782 oom:
1783 DBG(dev, "rx OOM %d" NL, slot);
1784 /* Drop the packet and recycle skb */
1785 ++dev->estats.rx_dropped_oom;
1786 emac_recycle_rx_skb(dev, slot, 0);
1787 goto next;
1788 }
1789
1790 if (received) {
1791 DBG2(dev, "rx %d BDs" NL, received);
1792 dev->rx_slot = slot;
1793 }
1794
1795 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) {
1796 mb();
1797 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) {
1798 DBG2(dev, "rx restart" NL);
1799 received = 0;
1800 goto again;
1801 }
1802
1803 if (dev->rx_sg_skb) {
1804 DBG2(dev, "dropping partial rx packet" NL);
1805 ++dev->estats.rx_dropped_error;
1806 dev_kfree_skb(dev->rx_sg_skb);
1807 dev->rx_sg_skb = NULL;
1808 }
1809
1810 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags);
1811 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan);
1812 emac_rx_enable(dev);
1813 dev->rx_slot = 0;
1814 }
1815 return received;
1816}
1817
1818/* NAPI poll context */
1819static int emac_peek_rx(void *param)
1820{
1821 struct emac_instance *dev = param;
1822
1823 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY);
1824}
1825
1826/* NAPI poll context */
1827static int emac_peek_rx_sg(void *param)
1828{
1829 struct emac_instance *dev = param;
1830
1831 int slot = dev->rx_slot;
1832 while (1) {
1833 u16 ctrl = dev->rx_desc[slot].ctrl;
1834 if (ctrl & MAL_RX_CTRL_EMPTY)
1835 return 0;
1836 else if (ctrl & MAL_RX_CTRL_LAST)
1837 return 1;
1838
1839 slot = (slot + 1) % NUM_RX_BUFF;
1840
1841 /* I'm just being paranoid here :) */
1842 if (unlikely(slot == dev->rx_slot))
1843 return 0;
1844 }
1845}
1846
1847/* Hard IRQ */
1848static void emac_rxde(void *param)
1849{
1850 struct emac_instance *dev = param;
1851
1852 ++dev->estats.rx_stopped;
1853 emac_rx_disable_async(dev);
1854}
1855
1856/* Hard IRQ */
1857static irqreturn_t emac_irq(int irq, void *dev_instance)
1858{
1859 struct emac_instance *dev = dev_instance;
1860 struct emac_regs __iomem *p = dev->emacp;
1861 struct emac_error_stats *st = &dev->estats;
1862 u32 isr;
1863
1864 spin_lock(&dev->lock);
1865
1866 isr = in_be32(&p->isr);
1867 out_be32(&p->isr, isr);
1868
1869 DBG(dev, "isr = %08x" NL, isr);
1870
1871 if (isr & EMAC4_ISR_TXPE)
1872 ++st->tx_parity;
1873 if (isr & EMAC4_ISR_RXPE)
1874 ++st->rx_parity;
1875 if (isr & EMAC4_ISR_TXUE)
1876 ++st->tx_underrun;
1877 if (isr & EMAC4_ISR_RXOE)
1878 ++st->rx_fifo_overrun;
1879 if (isr & EMAC_ISR_OVR)
1880 ++st->rx_overrun;
1881 if (isr & EMAC_ISR_BP)
1882 ++st->rx_bad_packet;
1883 if (isr & EMAC_ISR_RP)
1884 ++st->rx_runt_packet;
1885 if (isr & EMAC_ISR_SE)
1886 ++st->rx_short_event;
1887 if (isr & EMAC_ISR_ALE)
1888 ++st->rx_alignment_error;
1889 if (isr & EMAC_ISR_BFCS)
1890 ++st->rx_bad_fcs;
1891 if (isr & EMAC_ISR_PTLE)
1892 ++st->rx_packet_too_long;
1893 if (isr & EMAC_ISR_ORE)
1894 ++st->rx_out_of_range;
1895 if (isr & EMAC_ISR_IRE)
1896 ++st->rx_in_range;
1897 if (isr & EMAC_ISR_SQE)
1898 ++st->tx_sqe;
1899 if (isr & EMAC_ISR_TE)
1900 ++st->tx_errors;
1901
1902 spin_unlock(&dev->lock);
1903
1904 return IRQ_HANDLED;
1905}
1906
1907static struct net_device_stats *emac_stats(struct net_device *ndev)
1908{
1909 struct emac_instance *dev = netdev_priv(ndev);
1910 struct emac_stats *st = &dev->stats;
1911 struct emac_error_stats *est = &dev->estats;
1912 struct net_device_stats *nst = &dev->nstats;
1913 unsigned long flags;
1914
1915 DBG2(dev, "stats" NL);
1916
1917 /* Compute "legacy" statistics */
1918 spin_lock_irqsave(&dev->lock, flags);
1919 nst->rx_packets = (unsigned long)st->rx_packets;
1920 nst->rx_bytes = (unsigned long)st->rx_bytes;
1921 nst->tx_packets = (unsigned long)st->tx_packets;
1922 nst->tx_bytes = (unsigned long)st->tx_bytes;
1923 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom +
1924 est->rx_dropped_error +
1925 est->rx_dropped_resize +
1926 est->rx_dropped_mtu);
1927 nst->tx_dropped = (unsigned long)est->tx_dropped;
1928
1929 nst->rx_errors = (unsigned long)est->rx_bd_errors;
1930 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun +
1931 est->rx_fifo_overrun +
1932 est->rx_overrun);
1933 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error +
1934 est->rx_alignment_error);
1935 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs +
1936 est->rx_bad_fcs);
1937 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet +
1938 est->rx_bd_short_event +
1939 est->rx_bd_packet_too_long +
1940 est->rx_bd_out_of_range +
1941 est->rx_bd_in_range +
1942 est->rx_runt_packet +
1943 est->rx_short_event +
1944 est->rx_packet_too_long +
1945 est->rx_out_of_range +
1946 est->rx_in_range);
1947
1948 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors);
1949 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun +
1950 est->tx_underrun);
1951 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss;
1952 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral +
1953 est->tx_bd_excessive_collisions +
1954 est->tx_bd_late_collision +
1955 est->tx_bd_multple_collisions);
1956 spin_unlock_irqrestore(&dev->lock, flags);
1957 return nst;
1958}
1959
1960static struct mal_commac_ops emac_commac_ops = {
1961 .poll_tx = &emac_poll_tx,
1962 .poll_rx = &emac_poll_rx,
1963 .peek_rx = &emac_peek_rx,
1964 .rxde = &emac_rxde,
1965};
1966
1967static struct mal_commac_ops emac_commac_sg_ops = {
1968 .poll_tx = &emac_poll_tx,
1969 .poll_rx = &emac_poll_rx,
1970 .peek_rx = &emac_peek_rx_sg,
1971 .rxde = &emac_rxde,
1972};
1973
1974/* Ethtool support */
1975static int emac_ethtool_get_settings(struct net_device *ndev,
1976 struct ethtool_cmd *cmd)
1977{
1978 struct emac_instance *dev = netdev_priv(ndev);
1979
1980 cmd->supported = dev->phy.features;
1981 cmd->port = PORT_MII;
1982 cmd->phy_address = dev->phy.address;
1983 cmd->transceiver =
1984 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL;
1985
1986 mutex_lock(&dev->link_lock);
1987 cmd->advertising = dev->phy.advertising;
1988 cmd->autoneg = dev->phy.autoneg;
1989 cmd->speed = dev->phy.speed;
1990 cmd->duplex = dev->phy.duplex;
1991 mutex_unlock(&dev->link_lock);
1992
1993 return 0;
1994}
1995
1996static int emac_ethtool_set_settings(struct net_device *ndev,
1997 struct ethtool_cmd *cmd)
1998{
1999 struct emac_instance *dev = netdev_priv(ndev);
2000 u32 f = dev->phy.features;
2001
2002 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL,
2003 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising);
2004
2005 /* Basic sanity checks */
2006 if (dev->phy.address < 0)
2007 return -EOPNOTSUPP;
2008 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
2009 return -EINVAL;
2010 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
2011 return -EINVAL;
2012 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
2013 return -EINVAL;
2014
2015 if (cmd->autoneg == AUTONEG_DISABLE) {
2016 switch (cmd->speed) {
2017 case SPEED_10:
8e95a202
JP		 2018 if (cmd->duplex == DUPLEX_HALF &&
2019 !(f & SUPPORTED_10baseT_Half))
1d3bb996 2020 return -EINVAL;
8e95a202
JP		 2021 if (cmd->duplex == DUPLEX_FULL &&
2022 !(f & SUPPORTED_10baseT_Full))
1d3bb996
DG		 2023 return -EINVAL;
2024 break;
2025 case SPEED_100:
8e95a202
JP		 2026 if (cmd->duplex == DUPLEX_HALF &&
2027 !(f & SUPPORTED_100baseT_Half))
1d3bb996 2028 return -EINVAL;
8e95a202
JP		 2029 if (cmd->duplex == DUPLEX_FULL &&
2030 !(f & SUPPORTED_100baseT_Full))
1d3bb996
DG		 2031 return -EINVAL;
2032 break;
2033 case SPEED_1000:
8e95a202
JP		 2034 if (cmd->duplex == DUPLEX_HALF &&
2035 !(f & SUPPORTED_1000baseT_Half))
1d3bb996 2036 return -EINVAL;
8e95a202
JP		 2037 if (cmd->duplex == DUPLEX_FULL &&
2038 !(f & SUPPORTED_1000baseT_Full))
1d3bb996
DG		 2039 return -EINVAL;
2040 break;
2041 default:
2042 return -EINVAL;
2043 }
2044
2045 mutex_lock(&dev->link_lock);
2046 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed,
2047 cmd->duplex);
2048 mutex_unlock(&dev->link_lock);
2049
2050 } else {
2051 if (!(f & SUPPORTED_Autoneg))
2052 return -EINVAL;
2053
2054 mutex_lock(&dev->link_lock);
2055 dev->phy.def->ops->setup_aneg(&dev->phy,
2056 (cmd->advertising & f) |
2057 (dev->phy.advertising &
2058 (ADVERTISED_Pause |
2059 ADVERTISED_Asym_Pause)));
2060 mutex_unlock(&dev->link_lock);
2061 }
2062 emac_force_link_update(dev);
2063
2064 return 0;
2065}
2066
2067static void emac_ethtool_get_ringparam(struct net_device *ndev,
2068 struct ethtool_ringparam *rp)
2069{
2070 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF;
2071 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF;
2072}
2073
2074static void emac_ethtool_get_pauseparam(struct net_device *ndev,
2075 struct ethtool_pauseparam *pp)
2076{
2077 struct emac_instance *dev = netdev_priv(ndev);
2078
2079 mutex_lock(&dev->link_lock);
2080 if ((dev->phy.features & SUPPORTED_Autoneg) &&
2081 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause)))
2082 pp->autoneg = 1;
2083
2084 if (dev->phy.duplex == DUPLEX_FULL) {
2085 if (dev->phy.pause)
2086 pp->rx_pause = pp->tx_pause = 1;
2087 else if (dev->phy.asym_pause)
2088 pp->tx_pause = 1;
2089 }
2090 mutex_unlock(&dev->link_lock);
2091}
2092
1d3bb996
DG		 2093static int emac_get_regs_len(struct emac_instance *dev)
2094{
2095 if (emac_has_feature(dev, EMAC_FTR_EMAC4))
2096 return sizeof(struct emac_ethtool_regs_subhdr) +
05781ccd 2097 EMAC4_ETHTOOL_REGS_SIZE(dev);
1d3bb996
DG		 2098 else
2099 return sizeof(struct emac_ethtool_regs_subhdr) +
05781ccd 2100 EMAC_ETHTOOL_REGS_SIZE(dev);
1d3bb996
DG		 2101}
2102
2103static int emac_ethtool_get_regs_len(struct net_device *ndev)
2104{
2105 struct emac_instance *dev = netdev_priv(ndev);
2106 int size;
2107
2108 size = sizeof(struct emac_ethtool_regs_hdr) +
2109 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal);
2110 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2111 size += zmii_get_regs_len(dev->zmii_dev);
2112 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2113 size += rgmii_get_regs_len(dev->rgmii_dev);
2114 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2115 size += tah_get_regs_len(dev->tah_dev);
2116
2117 return size;
2118}
2119
2120static void *emac_dump_regs(struct emac_instance *dev, void *buf)
2121{
2122 struct emac_ethtool_regs_subhdr *hdr = buf;
2123
2124 hdr->index = dev->cell_index;
2125 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) {
2126 hdr->version = EMAC4_ETHTOOL_REGS_VER;
05781ccd 2127 memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev));
807540ba 2128 return (void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev);
1d3bb996
DG		 2129 } else {
2130 hdr->version = EMAC_ETHTOOL_REGS_VER;
05781ccd 2131 memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev));
807540ba 2132 return (void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev);
1d3bb996
DG		 2133 }
2134}
2135
2136static void emac_ethtool_get_regs(struct net_device *ndev,
2137 struct ethtool_regs *regs, void *buf)
2138{
2139 struct emac_instance *dev = netdev_priv(ndev);
2140 struct emac_ethtool_regs_hdr *hdr = buf;
2141
2142 hdr->components = 0;
2143 buf = hdr + 1;
2144
2145 buf = mal_dump_regs(dev->mal, buf);
2146 buf = emac_dump_regs(dev, buf);
2147 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) {
2148 hdr->components |= EMAC_ETHTOOL_REGS_ZMII;
2149 buf = zmii_dump_regs(dev->zmii_dev, buf);
2150 }
2151 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) {
2152 hdr->components |= EMAC_ETHTOOL_REGS_RGMII;
2153 buf = rgmii_dump_regs(dev->rgmii_dev, buf);
2154 }
2155 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) {
2156 hdr->components |= EMAC_ETHTOOL_REGS_TAH;
2157 buf = tah_dump_regs(dev->tah_dev, buf);
2158 }
2159}
2160
2161static int emac_ethtool_nway_reset(struct net_device *ndev)
2162{
2163 struct emac_instance *dev = netdev_priv(ndev);
2164 int res = 0;
2165
2166 DBG(dev, "nway_reset" NL);
2167
2168 if (dev->phy.address < 0)
2169 return -EOPNOTSUPP;
2170
2171 mutex_lock(&dev->link_lock);
2172 if (!dev->phy.autoneg) {
2173 res = -EINVAL;
2174 goto out;
2175 }
2176
2177 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising);
2178 out:
2179 mutex_unlock(&dev->link_lock);
2180 emac_force_link_update(dev);
2181 return res;
2182}
2183
15f0a394 2184static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset)
1d3bb996 2185{
15f0a394
BH		 2186 if (stringset == ETH_SS_STATS)
2187 return EMAC_ETHTOOL_STATS_COUNT;
2188 else
2189 return -EINVAL;
1d3bb996
DG		 2190}
2191
2192static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset,
2193 u8 * buf)
2194{
2195 if (stringset == ETH_SS_STATS)
2196 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys));
2197}
2198
2199static void emac_ethtool_get_ethtool_stats(struct net_device *ndev,
2200 struct ethtool_stats *estats,
2201 u64 * tmp_stats)
2202{
2203 struct emac_instance *dev = netdev_priv(ndev);
2204
2205 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats));
2206 tmp_stats += sizeof(dev->stats) / sizeof(u64);
2207 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats));
2208}
2209
2210static void emac_ethtool_get_drvinfo(struct net_device *ndev,
2211 struct ethtool_drvinfo *info)
2212{
2213 struct emac_instance *dev = netdev_priv(ndev);
2214
7826d43f
JP		 2215 strlcpy(info->driver, "ibm_emac", sizeof(info->driver));
2216 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2217 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s",
2218 dev->cell_index, dev->ofdev->dev.of_node->full_name);
1d3bb996
DG		 2219 info->regdump_len = emac_ethtool_get_regs_len(ndev);
2220}
2221
2222static const struct ethtool_ops emac_ethtool_ops = {
2223 .get_settings = emac_ethtool_get_settings,
2224 .set_settings = emac_ethtool_set_settings,
2225 .get_drvinfo = emac_ethtool_get_drvinfo,
2226
2227 .get_regs_len = emac_ethtool_get_regs_len,
2228 .get_regs = emac_ethtool_get_regs,
2229
2230 .nway_reset = emac_ethtool_nway_reset,
2231
2232 .get_ringparam = emac_ethtool_get_ringparam,
2233 .get_pauseparam = emac_ethtool_get_pauseparam,
2234
1d3bb996 2235 .get_strings = emac_ethtool_get_strings,
15f0a394 2236 .get_sset_count = emac_ethtool_get_sset_count,
1d3bb996
DG		 2237 .get_ethtool_stats = emac_ethtool_get_ethtool_stats,
2238
2239 .get_link = ethtool_op_get_link,
1d3bb996
DG		 2240};
2241
2242static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2243{
2244 struct emac_instance *dev = netdev_priv(ndev);
0fa0ee05 2245 struct mii_ioctl_data *data = if_mii(rq);
1d3bb996
DG		 2246
2247 DBG(dev, "ioctl %08x" NL, cmd);
2248
2249 if (dev->phy.address < 0)
2250 return -EOPNOTSUPP;
2251
2252 switch (cmd) {
2253 case SIOCGMIIPHY:
0fa0ee05 2254 data->phy_id = dev->phy.address;
1d3bb996
DG		 2255 /* Fall through */
2256 case SIOCGMIIREG:
0fa0ee05
BH		 2257 data->val_out = emac_mdio_read(ndev, dev->phy.address,
2258 data->reg_num);
1d3bb996
DG		 2259 return 0;
2260
2261 case SIOCSMIIREG:
0fa0ee05
BH		 2262 emac_mdio_write(ndev, dev->phy.address, data->reg_num,
2263 data->val_in);
1d3bb996
DG		 2264 return 0;
2265 default:
2266 return -EOPNOTSUPP;
2267 }
2268}
2269
2270struct emac_depentry {
2271 u32 phandle;
2272 struct device_node *node;
2dc11581 2273 struct platform_device *ofdev;
1d3bb996
DG		 2274 void *drvdata;
2275};
2276
2277#define EMAC_DEP_MAL_IDX 0
2278#define EMAC_DEP_ZMII_IDX 1
2279#define EMAC_DEP_RGMII_IDX 2
2280#define EMAC_DEP_TAH_IDX 3
2281#define EMAC_DEP_MDIO_IDX 4
2282#define EMAC_DEP_PREV_IDX 5
2283#define EMAC_DEP_COUNT 6
2284
fe17dc1e 2285static int emac_check_deps(struct emac_instance *dev,
1dd06ae8 2286 struct emac_depentry *deps)
1d3bb996
DG		 2287{
2288 int i, there = 0;
2289 struct device_node *np;
2290
2291 for (i = 0; i < EMAC_DEP_COUNT; i++) {
2292 /* no dependency on that item, allright */
2293 if (deps[i].phandle == 0) {
2294 there++;
2295 continue;
2296 }
2297 /* special case for blist as the dependency might go away */
2298 if (i == EMAC_DEP_PREV_IDX) {
2299 np = *(dev->blist - 1);
2300 if (np == NULL) {
2301 deps[i].phandle = 0;
2302 there++;
2303 continue;
2304 }
2305 if (deps[i].node == NULL)
2306 deps[i].node = of_node_get(np);
2307 }
2308 if (deps[i].node == NULL)
2309 deps[i].node = of_find_node_by_phandle(deps[i].phandle);
2310 if (deps[i].node == NULL)
2311 continue;
2312 if (deps[i].ofdev == NULL)
2313 deps[i].ofdev = of_find_device_by_node(deps[i].node);
2314 if (deps[i].ofdev == NULL)
2315 continue;
2316 if (deps[i].drvdata == NULL)
bc353832 2317 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev);
1d3bb996
DG		 2318 if (deps[i].drvdata != NULL)
2319 there++;
2320 }
807540ba 2321 return there == EMAC_DEP_COUNT;
1d3bb996
DG		 2322}
2323
2324static void emac_put_deps(struct emac_instance *dev)
2325{
5ac0fd00
ME		 2326 of_dev_put(dev->mal_dev);
2327 of_dev_put(dev->zmii_dev);
2328 of_dev_put(dev->rgmii_dev);
2329 of_dev_put(dev->mdio_dev);
2330 of_dev_put(dev->tah_dev);
1d3bb996
DG		 2331}
2332
1dd06ae8
GKH		 2333static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
2334 void *data)
1d3bb996
DG		 2335{
2336 /* We are only intereted in device addition */
2337 if (action == BUS_NOTIFY_BOUND_DRIVER)
2338 wake_up_all(&emac_probe_wait);
2339 return 0;
2340}
2341
fe17dc1e 2342static struct notifier_block emac_of_bus_notifier = {
1d3bb996
DG		 2343 .notifier_call = emac_of_bus_notify
2344};
2345
fe17dc1e 2346static int emac_wait_deps(struct emac_instance *dev)
1d3bb996
DG		 2347{
2348 struct emac_depentry deps[EMAC_DEP_COUNT];
2349 int i, err;
2350
2351 memset(&deps, 0, sizeof(deps));
2352
2353 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
2354 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
2355 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
2356 if (dev->tah_ph)
2357 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
2358 if (dev->mdio_ph)
2359 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph;
2360 if (dev->blist && dev->blist > emac_boot_list)
2361 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu;
1ab1d63a 2362 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier);
1d3bb996
DG		 2363 wait_event_timeout(emac_probe_wait,
2364 emac_check_deps(dev, deps),
2365 EMAC_PROBE_DEP_TIMEOUT);
1ab1d63a 2366 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier);
1d3bb996
DG		 2367 err = emac_check_deps(dev, deps) ? 0 : -ENODEV;
2368 for (i = 0; i < EMAC_DEP_COUNT; i++) {
5ac0fd00 2369 of_node_put(deps[i].node);
f339664c 2370 if (err)
1d3bb996
DG		 2371 of_dev_put(deps[i].ofdev);
2372 }
2373 if (err == 0) {
2374 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
2375 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
2376 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
2377 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
2378 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
2379 }
5ac0fd00 2380 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
1d3bb996
DG		 2381 return err;
2382}
2383
fe17dc1e 2384static int emac_read_uint_prop(struct device_node *np, const char *name,
1dd06ae8 2385 u32 *val, int fatal)
1d3bb996
DG		 2386{
2387 int len;
2388 const u32 *prop = of_get_property(np, name, &len);
2389 if (prop == NULL || len < sizeof(u32)) {
2390 if (fatal)
2391 printk(KERN_ERR "%s: missing %s property\n",
2392 np->full_name, name);
2393 return -ENODEV;
2394 }
2395 *val = *prop;
2396 return 0;
2397}
2398
fe17dc1e 2399static int emac_init_phy(struct emac_instance *dev)
1d3bb996 2400{
61c7a080 2401 struct device_node *np = dev->ofdev->dev.of_node;
1d3bb996
DG		 2402 struct net_device *ndev = dev->ndev;
2403 u32 phy_map, adv;
2404 int i;
2405
2406 dev->phy.dev = ndev;
2407 dev->phy.mode = dev->phy_mode;
2408
2409 /* PHY-less configuration.
2410 * XXX I probably should move these settings to the dev tree
2411 */
2412 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) {
2413 emac_reset(dev);
2414
2415 /* PHY-less configuration.
2416 * XXX I probably should move these settings to the dev tree
2417 */
2418 dev->phy.address = -1;
9e3cb294
VG		 2419 dev->phy.features = SUPPORTED_MII;
2420 if (emac_phy_supports_gige(dev->phy_mode))
2421 dev->phy.features |= SUPPORTED_1000baseT_Full;
2422 else
2423 dev->phy.features |= SUPPORTED_100baseT_Full;
1d3bb996
DG		 2424 dev->phy.pause = 1;
2425
2426 return 0;
2427 }
2428
2429 mutex_lock(&emac_phy_map_lock);
2430 phy_map = dev->phy_map | busy_phy_map;
2431
2432 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map);
2433
2434 dev->phy.mdio_read = emac_mdio_read;
2435 dev->phy.mdio_write = emac_mdio_write;
2436
0925ab5d
VB		 2437 /* Enable internal clock source */
2438#ifdef CONFIG_PPC_DCR_NATIVE
2439 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2440 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
11121e30
VB		 2441#endif
2442 /* PHY clock workaround */
2443 emac_rx_clk_tx(dev);
2444
2445 /* Enable internal clock source on 440GX*/
2446#ifdef CONFIG_PPC_DCR_NATIVE
2447 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2448 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS);
0925ab5d 2449#endif
1d3bb996
DG		 2450 /* Configure EMAC with defaults so we can at least use MDIO
2451 * This is needed mostly for 440GX
2452 */
2453 if (emac_phy_gpcs(dev->phy.mode)) {
2454 /* XXX
2455 * Make GPCS PHY address equal to EMAC index.
2456 * We probably should take into account busy_phy_map
2457 * and/or phy_map here.
2458 *
2459 * Note that the busy_phy_map is currently global
2460 * while it should probably be per-ASIC...
2461 */
9e3cb294
VG		 2462 dev->phy.gpcs_address = dev->gpcs_address;
2463 if (dev->phy.gpcs_address == 0xffffffff)
2464 dev->phy.address = dev->cell_index;
1d3bb996
DG		 2465 }
2466
2467 emac_configure(dev);
2468
2469 if (dev->phy_address != 0xffffffff)
2470 phy_map = ~(1 << dev->phy_address);
2471
2472 for (i = 0; i < 0x20; phy_map >>= 1, ++i)
2473 if (!(phy_map & 1)) {
2474 int r;
2475 busy_phy_map |= 1 << i;
2476
2477 /* Quick check if there is a PHY at the address */
2478 r = emac_mdio_read(dev->ndev, i, MII_BMCR);
2479 if (r == 0xffff || r < 0)
2480 continue;
2481 if (!emac_mii_phy_probe(&dev->phy, i))
2482 break;
2483 }
0925ab5d
VB		 2484
2485 /* Enable external clock source */
2486#ifdef CONFIG_PPC_DCR_NATIVE
2487 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX))
2488 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0);
2489#endif
1d3bb996
DG		 2490 mutex_unlock(&emac_phy_map_lock);
2491 if (i == 0x20) {
2492 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name);
2493 return -ENXIO;
2494 }
2495
2496 /* Init PHY */
2497 if (dev->phy.def->ops->init)
2498 dev->phy.def->ops->init(&dev->phy);
2499
2500 /* Disable any PHY features not supported by the platform */
2501 dev->phy.def->features &= ~dev->phy_feat_exc;
ae5d3372 2502 dev->phy.features &= ~dev->phy_feat_exc;
1d3bb996
DG		 2503
2504 /* Setup initial link parameters */
2505 if (dev->phy.features & SUPPORTED_Autoneg) {
2506 adv = dev->phy.features;
2507 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x))
2508 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
2509 /* Restart autonegotiation */
2510 dev->phy.def->ops->setup_aneg(&dev->phy, adv);
2511 } else {
2512 u32 f = dev->phy.def->features;
2513 int speed = SPEED_10, fd = DUPLEX_HALF;
2514
2515 /* Select highest supported speed/duplex */
2516 if (f & SUPPORTED_1000baseT_Full) {
2517 speed = SPEED_1000;
2518 fd = DUPLEX_FULL;
2519 } else if (f & SUPPORTED_1000baseT_Half)
2520 speed = SPEED_1000;
2521 else if (f & SUPPORTED_100baseT_Full) {
2522 speed = SPEED_100;
2523 fd = DUPLEX_FULL;
2524 } else if (f & SUPPORTED_100baseT_Half)
2525 speed = SPEED_100;
2526 else if (f & SUPPORTED_10baseT_Full)
2527 fd = DUPLEX_FULL;
2528
2529 /* Force link parameters */
2530 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd);
2531 }
2532 return 0;
2533}
2534
fe17dc1e 2535static int emac_init_config(struct emac_instance *dev)
1d3bb996 2536{
61c7a080 2537 struct device_node *np = dev->ofdev->dev.of_node;
1d3bb996 2538 const void *p;
1d3bb996
DG		 2539
2540 /* Read config from device-tree */
2541 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1))
2542 return -ENXIO;
2543 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1))
2544 return -ENXIO;
2545 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1))
2546 return -ENXIO;
2547 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1))
2548 return -ENXIO;
2549 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0))
2550 dev->max_mtu = 1500;
2551 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0))
2552 dev->rx_fifo_size = 2048;
2553 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0))
2554 dev->tx_fifo_size = 2048;
2555 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0))
2556 dev->rx_fifo_size_gige = dev->rx_fifo_size;
2557 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0))
2558 dev->tx_fifo_size_gige = dev->tx_fifo_size;
2559 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0))
2560 dev->phy_address = 0xffffffff;
2561 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0))
2562 dev->phy_map = 0xffffffff;
9e3cb294
VG		 2563 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0))
2564 dev->gpcs_address = 0xffffffff;
1d3bb996
DG		 2565 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1))
2566 return -ENXIO;
2567 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
2568 dev->tah_ph = 0;
2569 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
63b6cad7 2570 dev->tah_port = 0;
1d3bb996
DG		 2571 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
2572 dev->mdio_ph = 0;
2573 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))
a419aef8 2574 dev->zmii_ph = 0;
1d3bb996 2575 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0))
a419aef8 2576 dev->zmii_port = 0xffffffff;
1d3bb996 2577 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0))
a419aef8 2578 dev->rgmii_ph = 0;
1d3bb996 2579 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
a419aef8 2580 dev->rgmii_port = 0xffffffff;
1d3bb996
DG		 2581 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
2582 dev->fifo_entry_size = 16;
2583 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
2584 dev->mal_burst_size = 256;
2585
2586 /* PHY mode needs some decoding */
4157ef1b
SG		 2587 dev->phy_mode = of_get_phy_mode(np);
2588 if (dev->phy_mode < 0)
2589 dev->phy_mode = PHY_MODE_NA;
1d3bb996
DG		 2590
2591 /* Check EMAC version */
05781ccd
GE		 2592 if (of_device_is_compatible(np, "ibm,emac4sync")) {
2593 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC);
9e3cb294
VG		 2594 if (of_device_is_compatible(np, "ibm,emac-460ex") ||
2595 of_device_is_compatible(np, "ibm,emac-460gt"))
2596 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX;
9616a755
BH		 2597 if (of_device_is_compatible(np, "ibm,emac-405ex") ||
2598 of_device_is_compatible(np, "ibm,emac-405exr"))
2599 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
ae5d3372
DD		 2600 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) {
2601 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
2602 EMAC_FTR_APM821XX_NO_HALF_DUPLEX |
2603 EMAC_FTR_460EX_PHY_CLK_FIX);
2604 }
05781ccd 2605 } else if (of_device_is_compatible(np, "ibm,emac4")) {
1d3bb996 2606 dev->features |= EMAC_FTR_EMAC4;
0925ab5d
VB		 2607 if (of_device_is_compatible(np, "ibm,emac-440gx"))
2608 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX;
11121e30
VB		 2609 } else {
2610 if (of_device_is_compatible(np, "ibm,emac-440ep") ||
2611 of_device_is_compatible(np, "ibm,emac-440gr"))
2612 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX;
1ff0fcfc 2613 if (of_device_is_compatible(np, "ibm,emac-405ez")) {
3b3bceef 2614#ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
b68d185a 2615 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x;
1ff0fcfc
JB		 2616#else
2617 printk(KERN_ERR "%s: Flow control not disabled!\n",
2618 np->full_name);
2619 return -ENXIO;
2620#endif
2621 }
2622
0925ab5d 2623 }
bff713b5
BH		 2624
2625 /* Fixup some feature bits based on the device tree */
2626 if (of_get_property(np, "has-inverted-stacr-oc", NULL))
1d3bb996 2627 dev->features |= EMAC_FTR_STACR_OC_INVERT;
bff713b5
BH		 2628 if (of_get_property(np, "has-new-stacr-staopc", NULL))
2629 dev->features |= EMAC_FTR_HAS_NEW_STACR;
1d3bb996 2630
bff713b5
BH		 2631 /* CAB lacks the appropriate properties */
2632 if (of_device_is_compatible(np, "ibm,emac-axon"))
2633 dev->features |= EMAC_FTR_HAS_NEW_STACR |
2634 EMAC_FTR_STACR_OC_INVERT;
2635
2636 /* Enable TAH/ZMII/RGMII features as found */
1d3bb996 2637 if (dev->tah_ph != 0) {
3b3bceef 2638#ifdef CONFIG_IBM_EMAC_TAH
1d3bb996
DG		 2639 dev->features |= EMAC_FTR_HAS_TAH;
2640#else
2641 printk(KERN_ERR "%s: TAH support not enabled !\n",
2642 np->full_name);
2643 return -ENXIO;
2644#endif
2645 }
2646
2647 if (dev->zmii_ph != 0) {
3b3bceef 2648#ifdef CONFIG_IBM_EMAC_ZMII
1d3bb996
DG		 2649 dev->features |= EMAC_FTR_HAS_ZMII;
2650#else
2651 printk(KERN_ERR "%s: ZMII support not enabled !\n",
2652 np->full_name);
2653 return -ENXIO;
2654#endif
2655 }
2656
2657 if (dev->rgmii_ph != 0) {
3b3bceef 2658#ifdef CONFIG_IBM_EMAC_RGMII
1d3bb996
DG		 2659 dev->features |= EMAC_FTR_HAS_RGMII;
2660#else
2661 printk(KERN_ERR "%s: RGMII support not enabled !\n",
2662 np->full_name);
2663 return -ENXIO;
2664#endif
2665 }
2666
2667 /* Read MAC-address */
2668 p = of_get_property(np, "local-mac-address", NULL);
2669 if (p == NULL) {
2670 printk(KERN_ERR "%s: Can't find local-mac-address property\n",
2671 np->full_name);
2672 return -ENXIO;
2673 }
d458cdf7 2674 memcpy(dev->ndev->dev_addr, p, ETH_ALEN);
1d3bb996 2675
05781ccd
GE		 2676 /* IAHT and GAHT filter parameterization */
2677 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {
2678 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT;
2679 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT;
2680 } else {
2681 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT;
2682 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT;
2683 }
2684
1d3bb996
DG		 2685 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE);
2686 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige);
2687 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige);
2688 DBG(dev, "max_mtu : %d\n", dev->max_mtu);
2689 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq);
2690
2691 return 0;
2692}
2693
15efc02b
AB		 2694static const struct net_device_ops emac_netdev_ops = {
2695 .ndo_open = emac_open,
2696 .ndo_stop = emac_close,
2697 .ndo_get_stats = emac_stats,
afc4b13d 2698 .ndo_set_rx_mode = emac_set_multicast_list,
15efc02b
AB		 2699 .ndo_do_ioctl = emac_ioctl,
2700 .ndo_tx_timeout = emac_tx_timeout,
2701 .ndo_validate_addr = eth_validate_addr,
2702 .ndo_set_mac_address = eth_mac_addr,
2703 .ndo_start_xmit = emac_start_xmit,
2704 .ndo_change_mtu = eth_change_mtu,
2705};
2706
2707static const struct net_device_ops emac_gige_netdev_ops = {
2708 .ndo_open = emac_open,
2709 .ndo_stop = emac_close,
2710 .ndo_get_stats = emac_stats,
afc4b13d 2711 .ndo_set_rx_mode = emac_set_multicast_list,
15efc02b
AB		 2712 .ndo_do_ioctl = emac_ioctl,
2713 .ndo_tx_timeout = emac_tx_timeout,
2714 .ndo_validate_addr = eth_validate_addr,
2715 .ndo_set_mac_address = eth_mac_addr,
2716 .ndo_start_xmit = emac_start_xmit_sg,
2717 .ndo_change_mtu = emac_change_mtu,
2718};
2719
fe17dc1e 2720static int emac_probe(struct platform_device *ofdev)
1d3bb996
DG		 2721{
2722 struct net_device *ndev;
2723 struct emac_instance *dev;
61c7a080 2724 struct device_node *np = ofdev->dev.of_node;
1d3bb996
DG		 2725 struct device_node **blist = NULL;
2726 int err, i;
2727
be63c09a
JB		 2728 /* Skip unused/unwired EMACS. We leave the check for an unused
2729 * property here for now, but new flat device trees should set a
2730 * status property to "disabled" instead.
2731 */
2732 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np))
3d722562
HB		 2733 return -ENODEV;
2734
1d3bb996
DG		 2735 /* Find ourselves in the bootlist if we are there */
2736 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
2737 if (emac_boot_list[i] == np)
2738 blist = &emac_boot_list[i];
2739
2740 /* Allocate our net_device structure */
2741 err = -ENOMEM;
2742 ndev = alloc_etherdev(sizeof(struct emac_instance));
41de8d4c 2743 if (!ndev)
1d3bb996 2744 goto err_gone;
41de8d4c 2745
1d3bb996
DG		 2746 dev = netdev_priv(ndev);
2747 dev->ndev = ndev;
2748 dev->ofdev = ofdev;
2749 dev->blist = blist;
1d3bb996
DG		 2750 SET_NETDEV_DEV(ndev, &ofdev->dev);
2751
2752 /* Initialize some embedded data structures */
2753 mutex_init(&dev->mdio_lock);
2754 mutex_init(&dev->link_lock);
2755 spin_lock_init(&dev->lock);
2756 INIT_WORK(&dev->reset_work, emac_reset_work);
2757
2758 /* Init various config data based on device-tree */
2759 err = emac_init_config(dev);
2760 if (err != 0)
2761 goto err_free;
2762
2763 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */
2764 dev->emac_irq = irq_of_parse_and_map(np, 0);
2765 dev->wol_irq = irq_of_parse_and_map(np, 1);
2766 if (dev->emac_irq == NO_IRQ) {
2767 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name);
2768 goto err_free;
2769 }
2770 ndev->irq = dev->emac_irq;
2771
2772 /* Map EMAC regs */
2773 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) {
2774 printk(KERN_ERR "%s: Can't get registers address\n",
2775 np->full_name);
2776 goto err_irq_unmap;
2777 }
2778 // TODO : request_mem_region
05781ccd 2779 dev->emacp = ioremap(dev->rsrc_regs.start,
28f65c11 2780 resource_size(&dev->rsrc_regs));
1d3bb996
DG		 2781 if (dev->emacp == NULL) {
2782 printk(KERN_ERR "%s: Can't map device registers!\n",
2783 np->full_name);
2784 err = -ENOMEM;
2785 goto err_irq_unmap;
2786 }
2787
2788 /* Wait for dependent devices */
2789 err = emac_wait_deps(dev);
2790 if (err) {
2791 printk(KERN_ERR
2792 "%s: Timeout waiting for dependent devices\n",
2793 np->full_name);
2794 /* display more info about what's missing ? */
2795 goto err_reg_unmap;
2796 }
bc353832 2797 dev->mal = platform_get_drvdata(dev->mal_dev);
1d3bb996 2798 if (dev->mdio_dev != NULL)
bc353832 2799 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev);
1d3bb996
DG		 2800
2801 /* Register with MAL */
2802 dev->commac.ops = &emac_commac_ops;
2803 dev->commac.dev = dev;
2804 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan);
2805 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan);
2806 err = mal_register_commac(dev->mal, &dev->commac);
2807 if (err) {
2808 printk(KERN_ERR "%s: failed to register with mal %s!\n",
61c7a080 2809 np->full_name, dev->mal_dev->dev.of_node->full_name);
1d3bb996
DG		 2810 goto err_rel_deps;
2811 }
2812 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu);
2813 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu);
2814
2815 /* Get pointers to BD rings */
2816 dev->tx_desc =
2817 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan);
2818 dev->rx_desc =
2819 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan);
2820
2821 DBG(dev, "tx_desc %p" NL, dev->tx_desc);
2822 DBG(dev, "rx_desc %p" NL, dev->rx_desc);
2823
2824 /* Clean rings */
2825 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor));
2826 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor));
ab9b30cc
SN		 2827 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *));
2828 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *));
1d3bb996
DG		 2829
2830 /* Attach to ZMII, if needed */
2831 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) &&
2832 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0)
2833 goto err_unreg_commac;
2834
2835 /* Attach to RGMII, if needed */
2836 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) &&
2837 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
2838 goto err_detach_zmii;
2839
2840 /* Attach to TAH, if needed */
2841 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
2842 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
2843 goto err_detach_rgmii;
2844
2845 /* Set some link defaults before we can find out real parameters */
2846 dev->phy.speed = SPEED_100;
2847 dev->phy.duplex = DUPLEX_FULL;
2848 dev->phy.autoneg = AUTONEG_DISABLE;
2849 dev->phy.pause = dev->phy.asym_pause = 0;
2850 dev->stop_timeout = STOP_TIMEOUT_100;
2851 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer);
2852
ae5d3372
DD		 2853 /* Some SoCs like APM821xx does not support Half Duplex mode. */
2854 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) {
2855 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half |
2856 SUPPORTED_100baseT_Half |
2857 SUPPORTED_10baseT_Half);
2858 }
2859
1d3bb996
DG		 2860 /* Find PHY if any */
2861 err = emac_init_phy(dev);
2862 if (err != 0)
2863 goto err_detach_tah;
2864
5e4011e2
MM		 2865 if (dev->tah_dev) {
2866 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG;
2867 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM;
2868 }
1d3bb996 2869 ndev->watchdog_timeo = 5 * HZ;
1d3bb996 2870 if (emac_phy_supports_gige(dev->phy_mode)) {
15efc02b 2871 ndev->netdev_ops = &emac_gige_netdev_ops;
1d3bb996 2872 dev->commac.ops = &emac_commac_sg_ops;
15efc02b
AB		 2873 } else
2874 ndev->netdev_ops = &emac_netdev_ops;
7ad24ea4 2875 ndev->ethtool_ops = &emac_ethtool_ops;
1d3bb996
DG		 2876
2877 netif_carrier_off(ndev);
1d3bb996
DG		 2878
2879 err = register_netdev(ndev);
2880 if (err) {
2881 printk(KERN_ERR "%s: failed to register net device (%d)!\n",
2882 np->full_name, err);
2883 goto err_detach_tah;
2884 }
2885
2886 /* Set our drvdata last as we don't want them visible until we are
2887 * fully initialized
2888 */
2889 wmb();
bc353832 2890 platform_set_drvdata(ofdev, dev);
1d3bb996
DG		 2891
2892 /* There's a new kid in town ! Let's tell everybody */
2893 wake_up_all(&emac_probe_wait);
2894
2895
7c510e4b
JB		 2896 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n",
2897 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr);
1d3bb996 2898
9e3cb294
VG		 2899 if (dev->phy_mode == PHY_MODE_SGMII)
2900 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name);
2901
1d3bb996
DG		 2902 if (dev->phy.address >= 0)
2903 printk("%s: found %s PHY (0x%02x)\n", ndev->name,
2904 dev->phy.def->name, dev->phy.address);
2905
2906 emac_dbg_register(dev);
2907
2908 /* Life is good */
2909 return 0;
2910
2911 /* I have a bad feeling about this ... */
2912
2913 err_detach_tah:
2914 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2915 tah_detach(dev->tah_dev, dev->tah_port);
2916 err_detach_rgmii:
2917 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2918 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2919 err_detach_zmii:
2920 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2921 zmii_detach(dev->zmii_dev, dev->zmii_port);
2922 err_unreg_commac:
2923 mal_unregister_commac(dev->mal, &dev->commac);
2924 err_rel_deps:
2925 emac_put_deps(dev);
2926 err_reg_unmap:
2927 iounmap(dev->emacp);
2928 err_irq_unmap:
2929 if (dev->wol_irq != NO_IRQ)
2930 irq_dispose_mapping(dev->wol_irq);
2931 if (dev->emac_irq != NO_IRQ)
2932 irq_dispose_mapping(dev->emac_irq);
2933 err_free:
52933f05 2934 free_netdev(ndev);
1d3bb996
DG		 2935 err_gone:
2936 /* if we were on the bootlist, remove us as we won't show up and
2937 * wake up all waiters to notify them in case they were waiting
2938 * on us
2939 */
2940 if (blist) {
2941 *blist = NULL;
2942 wake_up_all(&emac_probe_wait);
2943 }
2944 return err;
2945}
2946
fe17dc1e 2947static int emac_remove(struct platform_device *ofdev)
1d3bb996 2948{
bc353832 2949 struct emac_instance *dev = platform_get_drvdata(ofdev);
1d3bb996
DG		 2950
2951 DBG(dev, "remove" NL);
2952
1d3bb996
DG		 2953 unregister_netdev(dev->ndev);
2954
23f333a2 2955 cancel_work_sync(&dev->reset_work);
61dbcece 2956
1d3bb996
DG		 2957 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
2958 tah_detach(dev->tah_dev, dev->tah_port);
2959 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
2960 rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
2961 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
2962 zmii_detach(dev->zmii_dev, dev->zmii_port);
2963
d6f14483
WG		 2964 busy_phy_map &= ~(1 << dev->phy.address);
2965 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map);
2966
1d3bb996
DG		 2967 mal_unregister_commac(dev->mal, &dev->commac);
2968 emac_put_deps(dev);
2969
2970 emac_dbg_unregister(dev);
2971 iounmap(dev->emacp);
2972
2973 if (dev->wol_irq != NO_IRQ)
2974 irq_dispose_mapping(dev->wol_irq);
2975 if (dev->emac_irq != NO_IRQ)
2976 irq_dispose_mapping(dev->emac_irq);
2977
52933f05 2978 free_netdev(dev->ndev);
1d3bb996
DG		 2979
2980 return 0;
2981}
2982
2983/* XXX Features in here should be replaced by properties... */
47b61667 2984static const struct of_device_id emac_match[] =
1d3bb996
DG		 2985{
2986 {
2987 .type = "network",
2988 .compatible = "ibm,emac",
2989 },
2990 {
2991 .type = "network",
2992 .compatible = "ibm,emac4",
2993 },
05781ccd
GE		 2994 {
2995 .type = "network",
2996 .compatible = "ibm,emac4sync",
2997 },
1d3bb996
DG		 2998 {},
2999};
e72701ac 3000MODULE_DEVICE_TABLE(of, emac_match);
1d3bb996 3001
74888760 3002static struct platform_driver emac_driver = {
4018294b
GL		 3003 .driver = {
3004 .name = "emac",
4018294b
GL		 3005 .of_match_table = emac_match,
3006 },
1d3bb996
DG		 3007 .probe = emac_probe,
3008 .remove = emac_remove,
3009};
3010
3011static void __init emac_make_bootlist(void)
3012{
3013 struct device_node *np = NULL;
3014 int j, max, i = 0, k;
3015 int cell_indices[EMAC_BOOT_LIST_SIZE];
3016
3017 /* Collect EMACs */
3018 while((np = of_find_all_nodes(np)) != NULL) {
3019 const u32 *idx;
3020
3021 if (of_match_node(emac_match, np) == NULL)
3022 continue;
3023 if (of_get_property(np, "unused", NULL))
3024 continue;
3025 idx = of_get_property(np, "cell-index", NULL);
3026 if (idx == NULL)
3027 continue;
3028 cell_indices[i] = *idx;
3029 emac_boot_list[i++] = of_node_get(np);
3030 if (i >= EMAC_BOOT_LIST_SIZE) {
3031 of_node_put(np);
3032 break;
3033 }
3034 }
3035 max = i;
3036
3037 /* Bubble sort them (doh, what a creative algorithm :-) */
3038 for (i = 0; max > 1 && (i < (max - 1)); i++)
3039 for (j = i; j < max; j++) {
3040 if (cell_indices[i] > cell_indices[j]) {
3041 np = emac_boot_list[i];
3042 emac_boot_list[i] = emac_boot_list[j];
3043 emac_boot_list[j] = np;
3044 k = cell_indices[i];
3045 cell_indices[i] = cell_indices[j];
3046 cell_indices[j] = k;
3047 }
3048 }
3049}
3050
3051static int __init emac_init(void)
3052{
3053 int rc;
3054
3055 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n");
3056
3057 /* Init debug stuff */
3058 emac_init_debug();
3059
3060 /* Build EMAC boot list */
3061 emac_make_bootlist();
3062
3063 /* Init submodules */
3064 rc = mal_init();
3065 if (rc)
3066 goto err;
3067 rc = zmii_init();
3068 if (rc)
3069 goto err_mal;
3070 rc = rgmii_init();
3071 if (rc)
3072 goto err_zmii;
3073 rc = tah_init();
3074 if (rc)
3075 goto err_rgmii;
74888760 3076 rc = platform_driver_register(&emac_driver);
1d3bb996
DG		 3077 if (rc)
3078 goto err_tah;
3079
3080 return 0;
3081
3082 err_tah:
3083 tah_exit();
3084 err_rgmii:
3085 rgmii_exit();
3086 err_zmii:
3087 zmii_exit();
3088 err_mal:
3089 mal_exit();
3090 err:
3091 return rc;
3092}
3093
3094static void __exit emac_exit(void)
3095{
3096 int i;
3097
74888760 3098 platform_driver_unregister(&emac_driver);
1d3bb996
DG		 3099
3100 tah_exit();
3101 rgmii_exit();
3102 zmii_exit();
3103 mal_exit();
3104 emac_fini_debug();
3105
3106 /* Destroy EMAC boot list */
3107 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
5ac0fd00 3108 of_node_put(emac_boot_list[i]);
1d3bb996
DG		 3109}
3110
3111module_init(emac_init);
3112module_exit(emac_exit);
Linux kernel - Deliverables
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