Commit | Line | Data |
---|---|---|
1d3bb996 DG |
1 | /* |
2 | * drivers/net/ibm_newemac/core.c | |
3 | * | |
4 | * Driver for PowerPC 4xx on-chip ethernet controller. | |
5 | * | |
6 | * Copyright (c) 2004, 2005 Zultys Technologies. | |
7 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
8 | * | |
9 | * Based on original work by | |
10 | * Matt Porter <mporter@kernel.crashing.org> | |
11 | * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
12 | * Armin Kuster <akuster@mvista.com> | |
13 | * Johnnie Peters <jpeters@mvista.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <linux/sched.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/skbuff.h> | |
30 | #include <linux/crc32.h> | |
31 | #include <linux/ethtool.h> | |
32 | #include <linux/mii.h> | |
33 | #include <linux/bitops.h> | |
34 | #include <linux/workqueue.h> | |
35 | ||
36 | #include <asm/processor.h> | |
37 | #include <asm/io.h> | |
38 | #include <asm/dma.h> | |
39 | #include <asm/uaccess.h> | |
40 | ||
41 | #include "core.h" | |
42 | ||
43 | /* | |
44 | * Lack of dma_unmap_???? calls is intentional. | |
45 | * | |
46 | * API-correct usage requires additional support state information to be | |
47 | * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to | |
48 | * EMAC design (e.g. TX buffer passed from network stack can be split into | |
49 | * several BDs, dma_map_single/dma_map_page can be used to map particular BD), | |
50 | * maintaining such information will add additional overhead. | |
51 | * Current DMA API implementation for 4xx processors only ensures cache coherency | |
52 | * and dma_unmap_???? routines are empty and are likely to stay this way. | |
53 | * I decided to omit dma_unmap_??? calls because I don't want to add additional | |
54 | * complexity just for the sake of following some abstract API, when it doesn't | |
55 | * add any real benefit to the driver. I understand that this decision maybe | |
56 | * controversial, but I really tried to make code API-correct and efficient | |
57 | * at the same time and didn't come up with code I liked :(. --ebs | |
58 | */ | |
59 | ||
60 | #define DRV_NAME "emac" | |
61 | #define DRV_VERSION "3.54" | |
62 | #define DRV_DESC "PPC 4xx OCP EMAC driver" | |
63 | ||
64 | MODULE_DESCRIPTION(DRV_DESC); | |
65 | MODULE_AUTHOR | |
66 | ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); | |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
69 | /* | |
70 | * PPC64 doesn't (yet) have a cacheable_memcpy | |
71 | */ | |
72 | #ifdef CONFIG_PPC64 | |
73 | #define cacheable_memcpy(d,s,n) memcpy((d),(s),(n)) | |
74 | #endif | |
75 | ||
76 | /* minimum number of free TX descriptors required to wake up TX process */ | |
77 | #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) | |
78 | ||
79 | /* If packet size is less than this number, we allocate small skb and copy packet | |
80 | * contents into it instead of just sending original big skb up | |
81 | */ | |
82 | #define EMAC_RX_COPY_THRESH CONFIG_IBM_NEW_EMAC_RX_COPY_THRESHOLD | |
83 | ||
84 | /* Since multiple EMACs share MDIO lines in various ways, we need | |
85 | * to avoid re-using the same PHY ID in cases where the arch didn't | |
86 | * setup precise phy_map entries | |
87 | * | |
88 | * XXX This is something that needs to be reworked as we can have multiple | |
89 | * EMAC "sets" (multiple ASICs containing several EMACs) though we can | |
90 | * probably require in that case to have explicit PHY IDs in the device-tree | |
91 | */ | |
92 | static u32 busy_phy_map; | |
93 | static DEFINE_MUTEX(emac_phy_map_lock); | |
94 | ||
95 | /* This is the wait queue used to wait on any event related to probe, that | |
96 | * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc... | |
97 | */ | |
98 | static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait); | |
99 | ||
100 | /* Having stable interface names is a doomed idea. However, it would be nice | |
101 | * if we didn't have completely random interface names at boot too :-) It's | |
102 | * just a matter of making everybody's life easier. Since we are doing | |
103 | * threaded probing, it's a bit harder though. The base idea here is that | |
104 | * we make up a list of all emacs in the device-tree before we register the | |
105 | * driver. Every emac will then wait for the previous one in the list to | |
106 | * initialize before itself. We should also keep that list ordered by | |
107 | * cell_index. | |
108 | * That list is only 4 entries long, meaning that additional EMACs don't | |
109 | * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased. | |
110 | */ | |
111 | ||
112 | #define EMAC_BOOT_LIST_SIZE 4 | |
113 | static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE]; | |
114 | ||
115 | /* How long should I wait for dependent devices ? */ | |
116 | #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5) | |
117 | ||
118 | /* I don't want to litter system log with timeout errors | |
119 | * when we have brain-damaged PHY. | |
120 | */ | |
121 | static inline void emac_report_timeout_error(struct emac_instance *dev, | |
122 | const char *error) | |
123 | { | |
124 | if (net_ratelimit()) | |
125 | printk(KERN_ERR "%s: %s\n", dev->ndev->name, error); | |
126 | } | |
127 | ||
128 | /* PHY polling intervals */ | |
129 | #define PHY_POLL_LINK_ON HZ | |
130 | #define PHY_POLL_LINK_OFF (HZ / 5) | |
131 | ||
132 | /* Graceful stop timeouts in us. | |
133 | * We should allow up to 1 frame time (full-duplex, ignoring collisions) | |
134 | */ | |
135 | #define STOP_TIMEOUT_10 1230 | |
136 | #define STOP_TIMEOUT_100 124 | |
137 | #define STOP_TIMEOUT_1000 13 | |
138 | #define STOP_TIMEOUT_1000_JUMBO 73 | |
139 | ||
140 | /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ | |
141 | static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { | |
142 | "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", | |
143 | "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", | |
144 | "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", | |
145 | "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", | |
146 | "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", | |
147 | "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", | |
148 | "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", | |
149 | "rx_bad_packet", "rx_runt_packet", "rx_short_event", | |
150 | "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", | |
151 | "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", | |
152 | "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", | |
153 | "tx_bd_excessive_collisions", "tx_bd_late_collision", | |
154 | "tx_bd_multple_collisions", "tx_bd_single_collision", | |
155 | "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", | |
156 | "tx_errors" | |
157 | }; | |
158 | ||
159 | static irqreturn_t emac_irq(int irq, void *dev_instance); | |
160 | static void emac_clean_tx_ring(struct emac_instance *dev); | |
161 | static void __emac_set_multicast_list(struct emac_instance *dev); | |
162 | ||
163 | static inline int emac_phy_supports_gige(int phy_mode) | |
164 | { | |
165 | return phy_mode == PHY_MODE_GMII || | |
166 | phy_mode == PHY_MODE_RGMII || | |
167 | phy_mode == PHY_MODE_TBI || | |
168 | phy_mode == PHY_MODE_RTBI; | |
169 | } | |
170 | ||
171 | static inline int emac_phy_gpcs(int phy_mode) | |
172 | { | |
173 | return phy_mode == PHY_MODE_TBI || | |
174 | phy_mode == PHY_MODE_RTBI; | |
175 | } | |
176 | ||
177 | static inline void emac_tx_enable(struct emac_instance *dev) | |
178 | { | |
179 | struct emac_regs __iomem *p = dev->emacp; | |
180 | u32 r; | |
181 | ||
182 | DBG(dev, "tx_enable" NL); | |
183 | ||
184 | r = in_be32(&p->mr0); | |
185 | if (!(r & EMAC_MR0_TXE)) | |
186 | out_be32(&p->mr0, r | EMAC_MR0_TXE); | |
187 | } | |
188 | ||
189 | static void emac_tx_disable(struct emac_instance *dev) | |
190 | { | |
191 | struct emac_regs __iomem *p = dev->emacp; | |
192 | u32 r; | |
193 | ||
194 | DBG(dev, "tx_disable" NL); | |
195 | ||
196 | r = in_be32(&p->mr0); | |
197 | if (r & EMAC_MR0_TXE) { | |
198 | int n = dev->stop_timeout; | |
199 | out_be32(&p->mr0, r & ~EMAC_MR0_TXE); | |
200 | while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { | |
201 | udelay(1); | |
202 | --n; | |
203 | } | |
204 | if (unlikely(!n)) | |
205 | emac_report_timeout_error(dev, "TX disable timeout"); | |
206 | } | |
207 | } | |
208 | ||
209 | static void emac_rx_enable(struct emac_instance *dev) | |
210 | { | |
211 | struct emac_regs __iomem *p = dev->emacp; | |
212 | u32 r; | |
213 | ||
214 | if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) | |
215 | goto out; | |
216 | ||
217 | DBG(dev, "rx_enable" NL); | |
218 | ||
219 | r = in_be32(&p->mr0); | |
220 | if (!(r & EMAC_MR0_RXE)) { | |
221 | if (unlikely(!(r & EMAC_MR0_RXI))) { | |
222 | /* Wait if previous async disable is still in progress */ | |
223 | int n = dev->stop_timeout; | |
224 | while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { | |
225 | udelay(1); | |
226 | --n; | |
227 | } | |
228 | if (unlikely(!n)) | |
229 | emac_report_timeout_error(dev, | |
230 | "RX disable timeout"); | |
231 | } | |
232 | out_be32(&p->mr0, r | EMAC_MR0_RXE); | |
233 | } | |
234 | out: | |
235 | ; | |
236 | } | |
237 | ||
238 | static void emac_rx_disable(struct emac_instance *dev) | |
239 | { | |
240 | struct emac_regs __iomem *p = dev->emacp; | |
241 | u32 r; | |
242 | ||
243 | DBG(dev, "rx_disable" NL); | |
244 | ||
245 | r = in_be32(&p->mr0); | |
246 | if (r & EMAC_MR0_RXE) { | |
247 | int n = dev->stop_timeout; | |
248 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); | |
249 | while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { | |
250 | udelay(1); | |
251 | --n; | |
252 | } | |
253 | if (unlikely(!n)) | |
254 | emac_report_timeout_error(dev, "RX disable timeout"); | |
255 | } | |
256 | } | |
257 | ||
258 | static inline void emac_netif_stop(struct emac_instance *dev) | |
259 | { | |
260 | netif_tx_lock_bh(dev->ndev); | |
261 | dev->no_mcast = 1; | |
262 | netif_tx_unlock_bh(dev->ndev); | |
263 | dev->ndev->trans_start = jiffies; /* prevent tx timeout */ | |
264 | mal_poll_disable(dev->mal, &dev->commac); | |
265 | netif_tx_disable(dev->ndev); | |
266 | } | |
267 | ||
268 | static inline void emac_netif_start(struct emac_instance *dev) | |
269 | { | |
270 | netif_tx_lock_bh(dev->ndev); | |
271 | dev->no_mcast = 0; | |
272 | if (dev->mcast_pending && netif_running(dev->ndev)) | |
273 | __emac_set_multicast_list(dev); | |
274 | netif_tx_unlock_bh(dev->ndev); | |
275 | ||
276 | netif_wake_queue(dev->ndev); | |
277 | ||
278 | /* NOTE: unconditional netif_wake_queue is only appropriate | |
279 | * so long as all callers are assured to have free tx slots | |
280 | * (taken from tg3... though the case where that is wrong is | |
281 | * not terribly harmful) | |
282 | */ | |
283 | mal_poll_enable(dev->mal, &dev->commac); | |
284 | } | |
285 | ||
286 | static inline void emac_rx_disable_async(struct emac_instance *dev) | |
287 | { | |
288 | struct emac_regs __iomem *p = dev->emacp; | |
289 | u32 r; | |
290 | ||
291 | DBG(dev, "rx_disable_async" NL); | |
292 | ||
293 | r = in_be32(&p->mr0); | |
294 | if (r & EMAC_MR0_RXE) | |
295 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); | |
296 | } | |
297 | ||
298 | static int emac_reset(struct emac_instance *dev) | |
299 | { | |
300 | struct emac_regs __iomem *p = dev->emacp; | |
301 | int n = 20; | |
302 | ||
303 | DBG(dev, "reset" NL); | |
304 | ||
305 | if (!dev->reset_failed) { | |
306 | /* 40x erratum suggests stopping RX channel before reset, | |
307 | * we stop TX as well | |
308 | */ | |
309 | emac_rx_disable(dev); | |
310 | emac_tx_disable(dev); | |
311 | } | |
312 | ||
313 | out_be32(&p->mr0, EMAC_MR0_SRST); | |
314 | while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) | |
315 | --n; | |
316 | ||
317 | if (n) { | |
318 | dev->reset_failed = 0; | |
319 | return 0; | |
320 | } else { | |
321 | emac_report_timeout_error(dev, "reset timeout"); | |
322 | dev->reset_failed = 1; | |
323 | return -ETIMEDOUT; | |
324 | } | |
325 | } | |
326 | ||
327 | static void emac_hash_mc(struct emac_instance *dev) | |
328 | { | |
329 | struct emac_regs __iomem *p = dev->emacp; | |
330 | u16 gaht[4] = { 0 }; | |
331 | struct dev_mc_list *dmi; | |
332 | ||
333 | DBG(dev, "hash_mc %d" NL, dev->ndev->mc_count); | |
334 | ||
335 | for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) { | |
336 | int bit; | |
337 | DBG2(dev, "mc %02x:%02x:%02x:%02x:%02x:%02x" NL, | |
338 | dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2], | |
339 | dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]); | |
340 | ||
341 | bit = 63 - (ether_crc(ETH_ALEN, dmi->dmi_addr) >> 26); | |
342 | gaht[bit >> 4] |= 0x8000 >> (bit & 0x0f); | |
343 | } | |
344 | out_be32(&p->gaht1, gaht[0]); | |
345 | out_be32(&p->gaht2, gaht[1]); | |
346 | out_be32(&p->gaht3, gaht[2]); | |
347 | out_be32(&p->gaht4, gaht[3]); | |
348 | } | |
349 | ||
350 | static inline u32 emac_iff2rmr(struct net_device *ndev) | |
351 | { | |
352 | struct emac_instance *dev = netdev_priv(ndev); | |
353 | u32 r; | |
354 | ||
355 | r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE; | |
356 | ||
357 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
358 | r |= EMAC4_RMR_BASE; | |
359 | else | |
360 | r |= EMAC_RMR_BASE; | |
361 | ||
362 | if (ndev->flags & IFF_PROMISC) | |
363 | r |= EMAC_RMR_PME; | |
364 | else if (ndev->flags & IFF_ALLMULTI || ndev->mc_count > 32) | |
365 | r |= EMAC_RMR_PMME; | |
366 | else if (ndev->mc_count > 0) | |
367 | r |= EMAC_RMR_MAE; | |
368 | ||
369 | return r; | |
370 | } | |
371 | ||
372 | static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) | |
373 | { | |
374 | u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT; | |
375 | ||
376 | DBG2(dev, "__emac_calc_base_mr1" NL); | |
377 | ||
378 | switch(tx_size) { | |
379 | case 2048: | |
380 | ret |= EMAC_MR1_TFS_2K; | |
381 | break; | |
382 | default: | |
383 | printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", | |
384 | dev->ndev->name, tx_size); | |
385 | } | |
386 | ||
387 | switch(rx_size) { | |
388 | case 16384: | |
389 | ret |= EMAC_MR1_RFS_16K; | |
390 | break; | |
391 | case 4096: | |
392 | ret |= EMAC_MR1_RFS_4K; | |
393 | break; | |
394 | default: | |
395 | printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", | |
396 | dev->ndev->name, rx_size); | |
397 | } | |
398 | ||
399 | return ret; | |
400 | } | |
401 | ||
402 | static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) | |
403 | { | |
404 | u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR | | |
4696c3c4 | 405 | EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000); |
1d3bb996 DG |
406 | |
407 | DBG2(dev, "__emac4_calc_base_mr1" NL); | |
408 | ||
409 | switch(tx_size) { | |
410 | case 4096: | |
411 | ret |= EMAC4_MR1_TFS_4K; | |
412 | break; | |
413 | case 2048: | |
414 | ret |= EMAC4_MR1_TFS_2K; | |
415 | break; | |
416 | default: | |
417 | printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", | |
418 | dev->ndev->name, tx_size); | |
419 | } | |
420 | ||
421 | switch(rx_size) { | |
422 | case 16384: | |
423 | ret |= EMAC4_MR1_RFS_16K; | |
424 | break; | |
425 | case 4096: | |
426 | ret |= EMAC4_MR1_RFS_4K; | |
427 | break; | |
428 | case 2048: | |
429 | ret |= EMAC4_MR1_RFS_2K; | |
430 | break; | |
431 | default: | |
432 | printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", | |
433 | dev->ndev->name, rx_size); | |
434 | } | |
435 | ||
436 | return ret; | |
437 | } | |
438 | ||
439 | static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) | |
440 | { | |
441 | return emac_has_feature(dev, EMAC_FTR_EMAC4) ? | |
442 | __emac4_calc_base_mr1(dev, tx_size, rx_size) : | |
443 | __emac_calc_base_mr1(dev, tx_size, rx_size); | |
444 | } | |
445 | ||
446 | static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size) | |
447 | { | |
448 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
449 | return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4; | |
450 | else | |
451 | return ((size >> 6) - 1) << EMAC_TRTR_SHIFT; | |
452 | } | |
453 | ||
454 | static inline u32 emac_calc_rwmr(struct emac_instance *dev, | |
455 | unsigned int low, unsigned int high) | |
456 | { | |
457 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
458 | return (low << 22) | ( (high & 0x3ff) << 6); | |
459 | else | |
460 | return (low << 23) | ( (high & 0x1ff) << 7); | |
461 | } | |
462 | ||
463 | static int emac_configure(struct emac_instance *dev) | |
464 | { | |
465 | struct emac_regs __iomem *p = dev->emacp; | |
466 | struct net_device *ndev = dev->ndev; | |
911b237d | 467 | int tx_size, rx_size, link = netif_carrier_ok(dev->ndev); |
1d3bb996 DG |
468 | u32 r, mr1 = 0; |
469 | ||
470 | DBG(dev, "configure" NL); | |
471 | ||
911b237d BH |
472 | if (!link) { |
473 | out_be32(&p->mr1, in_be32(&p->mr1) | |
474 | | EMAC_MR1_FDE | EMAC_MR1_ILE); | |
475 | udelay(100); | |
476 | } else if (emac_reset(dev) < 0) | |
1d3bb996 DG |
477 | return -ETIMEDOUT; |
478 | ||
479 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
480 | tah_reset(dev->tah_dev); | |
481 | ||
911b237d BH |
482 | DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n", |
483 | link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause); | |
1d3bb996 DG |
484 | |
485 | /* Default fifo sizes */ | |
486 | tx_size = dev->tx_fifo_size; | |
487 | rx_size = dev->rx_fifo_size; | |
488 | ||
911b237d BH |
489 | /* No link, force loopback */ |
490 | if (!link) | |
491 | mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE; | |
492 | ||
1d3bb996 | 493 | /* Check for full duplex */ |
911b237d | 494 | else if (dev->phy.duplex == DUPLEX_FULL) |
1d3bb996 DG |
495 | mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; |
496 | ||
497 | /* Adjust fifo sizes, mr1 and timeouts based on link speed */ | |
498 | dev->stop_timeout = STOP_TIMEOUT_10; | |
499 | switch (dev->phy.speed) { | |
500 | case SPEED_1000: | |
501 | if (emac_phy_gpcs(dev->phy.mode)) { | |
502 | mr1 |= EMAC_MR1_MF_1000GPCS | | |
503 | EMAC_MR1_MF_IPPA(dev->phy.address); | |
504 | ||
505 | /* Put some arbitrary OUI, Manuf & Rev IDs so we can | |
506 | * identify this GPCS PHY later. | |
507 | */ | |
508 | out_be32(&p->ipcr, 0xdeadbeef); | |
509 | } else | |
510 | mr1 |= EMAC_MR1_MF_1000; | |
511 | ||
512 | /* Extended fifo sizes */ | |
513 | tx_size = dev->tx_fifo_size_gige; | |
514 | rx_size = dev->rx_fifo_size_gige; | |
515 | ||
516 | if (dev->ndev->mtu > ETH_DATA_LEN) { | |
517 | mr1 |= EMAC_MR1_JPSM; | |
518 | dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; | |
519 | } else | |
520 | dev->stop_timeout = STOP_TIMEOUT_1000; | |
521 | break; | |
522 | case SPEED_100: | |
523 | mr1 |= EMAC_MR1_MF_100; | |
524 | dev->stop_timeout = STOP_TIMEOUT_100; | |
525 | break; | |
526 | default: /* make gcc happy */ | |
527 | break; | |
528 | } | |
529 | ||
530 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
531 | rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port, | |
532 | dev->phy.speed); | |
533 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
534 | zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed); | |
535 | ||
536 | /* on 40x erratum forces us to NOT use integrated flow control, | |
537 | * let's hope it works on 44x ;) | |
538 | */ | |
539 | if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) && | |
540 | dev->phy.duplex == DUPLEX_FULL) { | |
541 | if (dev->phy.pause) | |
542 | mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP; | |
543 | else if (dev->phy.asym_pause) | |
544 | mr1 |= EMAC_MR1_APP; | |
545 | } | |
546 | ||
547 | /* Add base settings & fifo sizes & program MR1 */ | |
548 | mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size); | |
549 | out_be32(&p->mr1, mr1); | |
550 | ||
551 | /* Set individual MAC address */ | |
552 | out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); | |
553 | out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | | |
554 | (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | | |
555 | ndev->dev_addr[5]); | |
556 | ||
557 | /* VLAN Tag Protocol ID */ | |
558 | out_be32(&p->vtpid, 0x8100); | |
559 | ||
560 | /* Receive mode register */ | |
561 | r = emac_iff2rmr(ndev); | |
562 | if (r & EMAC_RMR_MAE) | |
563 | emac_hash_mc(dev); | |
564 | out_be32(&p->rmr, r); | |
565 | ||
566 | /* FIFOs thresholds */ | |
567 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
568 | r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, | |
569 | tx_size / 2 / dev->fifo_entry_size); | |
570 | else | |
571 | r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, | |
572 | tx_size / 2 / dev->fifo_entry_size); | |
573 | out_be32(&p->tmr1, r); | |
574 | out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2)); | |
575 | ||
576 | /* PAUSE frame is sent when RX FIFO reaches its high-water mark, | |
577 | there should be still enough space in FIFO to allow the our link | |
578 | partner time to process this frame and also time to send PAUSE | |
579 | frame itself. | |
580 | ||
581 | Here is the worst case scenario for the RX FIFO "headroom" | |
582 | (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): | |
583 | ||
584 | 1) One maximum-length frame on TX 1522 bytes | |
585 | 2) One PAUSE frame time 64 bytes | |
586 | 3) PAUSE frame decode time allowance 64 bytes | |
587 | 4) One maximum-length frame on RX 1522 bytes | |
588 | 5) Round-trip propagation delay of the link (100Mb) 15 bytes | |
589 | ---------- | |
590 | 3187 bytes | |
591 | ||
592 | I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) | |
593 | low-water mark to RX_FIFO_SIZE / 8 (512 bytes) | |
594 | */ | |
595 | r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size, | |
596 | rx_size / 4 / dev->fifo_entry_size); | |
597 | out_be32(&p->rwmr, r); | |
598 | ||
599 | /* Set PAUSE timer to the maximum */ | |
600 | out_be32(&p->ptr, 0xffff); | |
601 | ||
602 | /* IRQ sources */ | |
603 | r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | | |
604 | EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | | |
605 | EMAC_ISR_IRE | EMAC_ISR_TE; | |
606 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
607 | r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE | | |
608 | EMAC4_ISR_RXOE | */; | |
609 | out_be32(&p->iser, r); | |
610 | ||
611 | /* We need to take GPCS PHY out of isolate mode after EMAC reset */ | |
612 | if (emac_phy_gpcs(dev->phy.mode)) | |
613 | emac_mii_reset_phy(&dev->phy); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | static void emac_reinitialize(struct emac_instance *dev) | |
619 | { | |
620 | DBG(dev, "reinitialize" NL); | |
621 | ||
622 | emac_netif_stop(dev); | |
623 | if (!emac_configure(dev)) { | |
624 | emac_tx_enable(dev); | |
625 | emac_rx_enable(dev); | |
626 | } | |
627 | emac_netif_start(dev); | |
628 | } | |
629 | ||
630 | static void emac_full_tx_reset(struct emac_instance *dev) | |
631 | { | |
632 | DBG(dev, "full_tx_reset" NL); | |
633 | ||
634 | emac_tx_disable(dev); | |
635 | mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); | |
636 | emac_clean_tx_ring(dev); | |
637 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; | |
638 | ||
639 | emac_configure(dev); | |
640 | ||
641 | mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); | |
642 | emac_tx_enable(dev); | |
643 | emac_rx_enable(dev); | |
644 | } | |
645 | ||
646 | static void emac_reset_work(struct work_struct *work) | |
647 | { | |
648 | struct emac_instance *dev = container_of(work, struct emac_instance, reset_work); | |
649 | ||
650 | DBG(dev, "reset_work" NL); | |
651 | ||
652 | mutex_lock(&dev->link_lock); | |
61dbcece BH |
653 | if (dev->opened) { |
654 | emac_netif_stop(dev); | |
655 | emac_full_tx_reset(dev); | |
656 | emac_netif_start(dev); | |
657 | } | |
1d3bb996 DG |
658 | mutex_unlock(&dev->link_lock); |
659 | } | |
660 | ||
661 | static void emac_tx_timeout(struct net_device *ndev) | |
662 | { | |
663 | struct emac_instance *dev = netdev_priv(ndev); | |
664 | ||
665 | DBG(dev, "tx_timeout" NL); | |
666 | ||
667 | schedule_work(&dev->reset_work); | |
668 | } | |
669 | ||
670 | ||
671 | static inline int emac_phy_done(struct emac_instance *dev, u32 stacr) | |
672 | { | |
673 | int done = !!(stacr & EMAC_STACR_OC); | |
674 | ||
675 | if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) | |
676 | done = !done; | |
677 | ||
678 | return done; | |
679 | }; | |
680 | ||
681 | static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg) | |
682 | { | |
683 | struct emac_regs __iomem *p = dev->emacp; | |
684 | u32 r = 0; | |
685 | int n, err = -ETIMEDOUT; | |
686 | ||
687 | mutex_lock(&dev->mdio_lock); | |
688 | ||
689 | DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg); | |
690 | ||
691 | /* Enable proper MDIO port */ | |
692 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
693 | zmii_get_mdio(dev->zmii_dev, dev->zmii_port); | |
694 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
695 | rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); | |
696 | ||
697 | /* Wait for management interface to become idle */ | |
698 | n = 10; | |
699 | while (!emac_phy_done(dev, in_be32(&p->stacr))) { | |
700 | udelay(1); | |
701 | if (!--n) { | |
702 | DBG2(dev, " -> timeout wait idle\n"); | |
703 | goto bail; | |
704 | } | |
705 | } | |
706 | ||
707 | /* Issue read command */ | |
708 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
709 | r = EMAC4_STACR_BASE(dev->opb_bus_freq); | |
710 | else | |
711 | r = EMAC_STACR_BASE(dev->opb_bus_freq); | |
712 | if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) | |
713 | r |= EMAC_STACR_OC; | |
bff713b5 | 714 | if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) |
1d3bb996 DG |
715 | r |= EMACX_STACR_STAC_READ; |
716 | else | |
717 | r |= EMAC_STACR_STAC_READ; | |
718 | r |= (reg & EMAC_STACR_PRA_MASK) | |
719 | | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT); | |
720 | out_be32(&p->stacr, r); | |
721 | ||
722 | /* Wait for read to complete */ | |
723 | n = 100; | |
724 | while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) { | |
725 | udelay(1); | |
726 | if (!--n) { | |
727 | DBG2(dev, " -> timeout wait complete\n"); | |
728 | goto bail; | |
729 | } | |
730 | } | |
731 | ||
732 | if (unlikely(r & EMAC_STACR_PHYE)) { | |
733 | DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg); | |
734 | err = -EREMOTEIO; | |
735 | goto bail; | |
736 | } | |
737 | ||
738 | r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); | |
739 | ||
740 | DBG2(dev, "mdio_read -> %04x" NL, r); | |
741 | err = 0; | |
742 | bail: | |
743 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
744 | rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); | |
745 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
746 | zmii_put_mdio(dev->zmii_dev, dev->zmii_port); | |
747 | mutex_unlock(&dev->mdio_lock); | |
748 | ||
749 | return err == 0 ? r : err; | |
750 | } | |
751 | ||
752 | static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg, | |
753 | u16 val) | |
754 | { | |
755 | struct emac_regs __iomem *p = dev->emacp; | |
756 | u32 r = 0; | |
757 | int n, err = -ETIMEDOUT; | |
758 | ||
759 | mutex_lock(&dev->mdio_lock); | |
760 | ||
761 | DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val); | |
762 | ||
763 | /* Enable proper MDIO port */ | |
764 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
765 | zmii_get_mdio(dev->zmii_dev, dev->zmii_port); | |
766 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
767 | rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); | |
768 | ||
769 | /* Wait for management interface to be idle */ | |
770 | n = 10; | |
771 | while (!emac_phy_done(dev, in_be32(&p->stacr))) { | |
772 | udelay(1); | |
773 | if (!--n) { | |
774 | DBG2(dev, " -> timeout wait idle\n"); | |
775 | goto bail; | |
776 | } | |
777 | } | |
778 | ||
779 | /* Issue write command */ | |
780 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
781 | r = EMAC4_STACR_BASE(dev->opb_bus_freq); | |
782 | else | |
783 | r = EMAC_STACR_BASE(dev->opb_bus_freq); | |
784 | if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) | |
785 | r |= EMAC_STACR_OC; | |
bff713b5 | 786 | if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) |
1d3bb996 DG |
787 | r |= EMACX_STACR_STAC_WRITE; |
788 | else | |
789 | r |= EMAC_STACR_STAC_WRITE; | |
790 | r |= (reg & EMAC_STACR_PRA_MASK) | | |
791 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | | |
792 | (val << EMAC_STACR_PHYD_SHIFT); | |
793 | out_be32(&p->stacr, r); | |
794 | ||
795 | /* Wait for write to complete */ | |
796 | n = 100; | |
797 | while (!emac_phy_done(dev, in_be32(&p->stacr))) { | |
798 | udelay(1); | |
799 | if (!--n) { | |
800 | DBG2(dev, " -> timeout wait complete\n"); | |
801 | goto bail; | |
802 | } | |
803 | } | |
804 | err = 0; | |
805 | bail: | |
806 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
807 | rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); | |
808 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
809 | zmii_put_mdio(dev->zmii_dev, dev->zmii_port); | |
810 | mutex_unlock(&dev->mdio_lock); | |
811 | } | |
812 | ||
813 | static int emac_mdio_read(struct net_device *ndev, int id, int reg) | |
814 | { | |
815 | struct emac_instance *dev = netdev_priv(ndev); | |
816 | int res; | |
817 | ||
818 | res = __emac_mdio_read(dev->mdio_instance ? dev->mdio_instance : dev, | |
819 | (u8) id, (u8) reg); | |
820 | return res; | |
821 | } | |
822 | ||
823 | static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) | |
824 | { | |
825 | struct emac_instance *dev = netdev_priv(ndev); | |
826 | ||
827 | __emac_mdio_write(dev->mdio_instance ? dev->mdio_instance : dev, | |
828 | (u8) id, (u8) reg, (u16) val); | |
829 | } | |
830 | ||
831 | /* Tx lock BH */ | |
832 | static void __emac_set_multicast_list(struct emac_instance *dev) | |
833 | { | |
834 | struct emac_regs __iomem *p = dev->emacp; | |
835 | u32 rmr = emac_iff2rmr(dev->ndev); | |
836 | ||
837 | DBG(dev, "__multicast %08x" NL, rmr); | |
838 | ||
839 | /* I decided to relax register access rules here to avoid | |
840 | * full EMAC reset. | |
841 | * | |
842 | * There is a real problem with EMAC4 core if we use MWSW_001 bit | |
843 | * in MR1 register and do a full EMAC reset. | |
844 | * One TX BD status update is delayed and, after EMAC reset, it | |
845 | * never happens, resulting in TX hung (it'll be recovered by TX | |
846 | * timeout handler eventually, but this is just gross). | |
847 | * So we either have to do full TX reset or try to cheat here :) | |
848 | * | |
849 | * The only required change is to RX mode register, so I *think* all | |
850 | * we need is just to stop RX channel. This seems to work on all | |
851 | * tested SoCs. --ebs | |
852 | * | |
853 | * If we need the full reset, we might just trigger the workqueue | |
854 | * and do it async... a bit nasty but should work --BenH | |
855 | */ | |
856 | dev->mcast_pending = 0; | |
857 | emac_rx_disable(dev); | |
858 | if (rmr & EMAC_RMR_MAE) | |
859 | emac_hash_mc(dev); | |
860 | out_be32(&p->rmr, rmr); | |
861 | emac_rx_enable(dev); | |
862 | } | |
863 | ||
864 | /* Tx lock BH */ | |
865 | static void emac_set_multicast_list(struct net_device *ndev) | |
866 | { | |
867 | struct emac_instance *dev = netdev_priv(ndev); | |
868 | ||
869 | DBG(dev, "multicast" NL); | |
870 | ||
871 | BUG_ON(!netif_running(dev->ndev)); | |
872 | ||
873 | if (dev->no_mcast) { | |
874 | dev->mcast_pending = 1; | |
875 | return; | |
876 | } | |
877 | __emac_set_multicast_list(dev); | |
878 | } | |
879 | ||
880 | static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu) | |
881 | { | |
882 | int rx_sync_size = emac_rx_sync_size(new_mtu); | |
883 | int rx_skb_size = emac_rx_skb_size(new_mtu); | |
884 | int i, ret = 0; | |
885 | ||
886 | mutex_lock(&dev->link_lock); | |
887 | emac_netif_stop(dev); | |
888 | emac_rx_disable(dev); | |
889 | mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); | |
890 | ||
891 | if (dev->rx_sg_skb) { | |
892 | ++dev->estats.rx_dropped_resize; | |
893 | dev_kfree_skb(dev->rx_sg_skb); | |
894 | dev->rx_sg_skb = NULL; | |
895 | } | |
896 | ||
897 | /* Make a first pass over RX ring and mark BDs ready, dropping | |
898 | * non-processed packets on the way. We need this as a separate pass | |
899 | * to simplify error recovery in the case of allocation failure later. | |
900 | */ | |
901 | for (i = 0; i < NUM_RX_BUFF; ++i) { | |
902 | if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) | |
903 | ++dev->estats.rx_dropped_resize; | |
904 | ||
905 | dev->rx_desc[i].data_len = 0; | |
906 | dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | | |
907 | (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
908 | } | |
909 | ||
910 | /* Reallocate RX ring only if bigger skb buffers are required */ | |
911 | if (rx_skb_size <= dev->rx_skb_size) | |
912 | goto skip; | |
913 | ||
914 | /* Second pass, allocate new skbs */ | |
915 | for (i = 0; i < NUM_RX_BUFF; ++i) { | |
916 | struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); | |
917 | if (!skb) { | |
918 | ret = -ENOMEM; | |
919 | goto oom; | |
920 | } | |
921 | ||
922 | BUG_ON(!dev->rx_skb[i]); | |
923 | dev_kfree_skb(dev->rx_skb[i]); | |
924 | ||
925 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); | |
926 | dev->rx_desc[i].data_ptr = | |
927 | dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size, | |
928 | DMA_FROM_DEVICE) + 2; | |
929 | dev->rx_skb[i] = skb; | |
930 | } | |
931 | skip: | |
932 | /* Check if we need to change "Jumbo" bit in MR1 */ | |
933 | if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) { | |
934 | /* This is to prevent starting RX channel in emac_rx_enable() */ | |
935 | set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
936 | ||
937 | dev->ndev->mtu = new_mtu; | |
938 | emac_full_tx_reset(dev); | |
939 | } | |
940 | ||
941 | mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu)); | |
942 | oom: | |
943 | /* Restart RX */ | |
944 | clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
945 | dev->rx_slot = 0; | |
946 | mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); | |
947 | emac_rx_enable(dev); | |
948 | emac_netif_start(dev); | |
949 | mutex_unlock(&dev->link_lock); | |
950 | ||
951 | return ret; | |
952 | } | |
953 | ||
954 | /* Process ctx, rtnl_lock semaphore */ | |
955 | static int emac_change_mtu(struct net_device *ndev, int new_mtu) | |
956 | { | |
957 | struct emac_instance *dev = netdev_priv(ndev); | |
958 | int ret = 0; | |
959 | ||
960 | if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu) | |
961 | return -EINVAL; | |
962 | ||
963 | DBG(dev, "change_mtu(%d)" NL, new_mtu); | |
964 | ||
965 | if (netif_running(ndev)) { | |
966 | /* Check if we really need to reinitalize RX ring */ | |
967 | if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) | |
968 | ret = emac_resize_rx_ring(dev, new_mtu); | |
969 | } | |
970 | ||
971 | if (!ret) { | |
972 | ndev->mtu = new_mtu; | |
973 | dev->rx_skb_size = emac_rx_skb_size(new_mtu); | |
974 | dev->rx_sync_size = emac_rx_sync_size(new_mtu); | |
975 | } | |
976 | ||
977 | return ret; | |
978 | } | |
979 | ||
980 | static void emac_clean_tx_ring(struct emac_instance *dev) | |
981 | { | |
982 | int i; | |
983 | ||
984 | for (i = 0; i < NUM_TX_BUFF; ++i) { | |
985 | if (dev->tx_skb[i]) { | |
986 | dev_kfree_skb(dev->tx_skb[i]); | |
987 | dev->tx_skb[i] = NULL; | |
988 | if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) | |
989 | ++dev->estats.tx_dropped; | |
990 | } | |
991 | dev->tx_desc[i].ctrl = 0; | |
992 | dev->tx_desc[i].data_ptr = 0; | |
993 | } | |
994 | } | |
995 | ||
996 | static void emac_clean_rx_ring(struct emac_instance *dev) | |
997 | { | |
998 | int i; | |
999 | ||
1000 | for (i = 0; i < NUM_RX_BUFF; ++i) | |
1001 | if (dev->rx_skb[i]) { | |
1002 | dev->rx_desc[i].ctrl = 0; | |
1003 | dev_kfree_skb(dev->rx_skb[i]); | |
1004 | dev->rx_skb[i] = NULL; | |
1005 | dev->rx_desc[i].data_ptr = 0; | |
1006 | } | |
1007 | ||
1008 | if (dev->rx_sg_skb) { | |
1009 | dev_kfree_skb(dev->rx_sg_skb); | |
1010 | dev->rx_sg_skb = NULL; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot, | |
1015 | gfp_t flags) | |
1016 | { | |
1017 | struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); | |
1018 | if (unlikely(!skb)) | |
1019 | return -ENOMEM; | |
1020 | ||
1021 | dev->rx_skb[slot] = skb; | |
1022 | dev->rx_desc[slot].data_len = 0; | |
1023 | ||
1024 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); | |
1025 | dev->rx_desc[slot].data_ptr = | |
1026 | dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size, | |
1027 | DMA_FROM_DEVICE) + 2; | |
1028 | wmb(); | |
1029 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | | |
1030 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | static void emac_print_link_status(struct emac_instance *dev) | |
1036 | { | |
1037 | if (netif_carrier_ok(dev->ndev)) | |
1038 | printk(KERN_INFO "%s: link is up, %d %s%s\n", | |
1039 | dev->ndev->name, dev->phy.speed, | |
1040 | dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", | |
1041 | dev->phy.pause ? ", pause enabled" : | |
1042 | dev->phy.asym_pause ? ", asymmetric pause enabled" : ""); | |
1043 | else | |
1044 | printk(KERN_INFO "%s: link is down\n", dev->ndev->name); | |
1045 | } | |
1046 | ||
1047 | /* Process ctx, rtnl_lock semaphore */ | |
1048 | static int emac_open(struct net_device *ndev) | |
1049 | { | |
1050 | struct emac_instance *dev = netdev_priv(ndev); | |
1051 | int err, i; | |
1052 | ||
1053 | DBG(dev, "open" NL); | |
1054 | ||
1055 | /* Setup error IRQ handler */ | |
1056 | err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev); | |
1057 | if (err) { | |
1058 | printk(KERN_ERR "%s: failed to request IRQ %d\n", | |
1059 | ndev->name, dev->emac_irq); | |
1060 | return err; | |
1061 | } | |
1062 | ||
1063 | /* Allocate RX ring */ | |
1064 | for (i = 0; i < NUM_RX_BUFF; ++i) | |
1065 | if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { | |
1066 | printk(KERN_ERR "%s: failed to allocate RX ring\n", | |
1067 | ndev->name); | |
1068 | goto oom; | |
1069 | } | |
1070 | ||
1071 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0; | |
1072 | clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
1073 | dev->rx_sg_skb = NULL; | |
1074 | ||
1075 | mutex_lock(&dev->link_lock); | |
61dbcece | 1076 | dev->opened = 1; |
1d3bb996 | 1077 | |
61dbcece | 1078 | /* Start PHY polling now. |
1d3bb996 DG |
1079 | */ |
1080 | if (dev->phy.address >= 0) { | |
1081 | int link_poll_interval; | |
1082 | if (dev->phy.def->ops->poll_link(&dev->phy)) { | |
1083 | dev->phy.def->ops->read_link(&dev->phy); | |
1084 | netif_carrier_on(dev->ndev); | |
1085 | link_poll_interval = PHY_POLL_LINK_ON; | |
1086 | } else { | |
1087 | netif_carrier_off(dev->ndev); | |
1088 | link_poll_interval = PHY_POLL_LINK_OFF; | |
1089 | } | |
1090 | dev->link_polling = 1; | |
1091 | wmb(); | |
1092 | schedule_delayed_work(&dev->link_work, link_poll_interval); | |
1093 | emac_print_link_status(dev); | |
1094 | } else | |
1095 | netif_carrier_on(dev->ndev); | |
1096 | ||
1097 | emac_configure(dev); | |
1098 | mal_poll_add(dev->mal, &dev->commac); | |
1099 | mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); | |
1100 | mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu)); | |
1101 | mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1102 | emac_tx_enable(dev); | |
1103 | emac_rx_enable(dev); | |
1104 | emac_netif_start(dev); | |
1105 | ||
1106 | mutex_unlock(&dev->link_lock); | |
1107 | ||
1108 | return 0; | |
1109 | oom: | |
1110 | emac_clean_rx_ring(dev); | |
1111 | free_irq(dev->emac_irq, dev); | |
1112 | ||
1113 | return -ENOMEM; | |
1114 | } | |
1115 | ||
1116 | /* BHs disabled */ | |
1117 | #if 0 | |
1118 | static int emac_link_differs(struct emac_instance *dev) | |
1119 | { | |
1120 | u32 r = in_be32(&dev->emacp->mr1); | |
1121 | ||
1122 | int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; | |
1123 | int speed, pause, asym_pause; | |
1124 | ||
1125 | if (r & EMAC_MR1_MF_1000) | |
1126 | speed = SPEED_1000; | |
1127 | else if (r & EMAC_MR1_MF_100) | |
1128 | speed = SPEED_100; | |
1129 | else | |
1130 | speed = SPEED_10; | |
1131 | ||
1132 | switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { | |
1133 | case (EMAC_MR1_EIFC | EMAC_MR1_APP): | |
1134 | pause = 1; | |
1135 | asym_pause = 0; | |
1136 | break; | |
1137 | case EMAC_MR1_APP: | |
1138 | pause = 0; | |
1139 | asym_pause = 1; | |
1140 | break; | |
1141 | default: | |
1142 | pause = asym_pause = 0; | |
1143 | } | |
1144 | return speed != dev->phy.speed || duplex != dev->phy.duplex || | |
1145 | pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; | |
1146 | } | |
1147 | #endif | |
1148 | ||
1149 | static void emac_link_timer(struct work_struct *work) | |
1150 | { | |
1151 | struct emac_instance *dev = | |
1152 | container_of((struct delayed_work *)work, | |
1153 | struct emac_instance, link_work); | |
1154 | int link_poll_interval; | |
1155 | ||
1156 | mutex_lock(&dev->link_lock); | |
1d3bb996 DG |
1157 | DBG2(dev, "link timer" NL); |
1158 | ||
61dbcece BH |
1159 | if (!dev->opened) |
1160 | goto bail; | |
1161 | ||
1d3bb996 DG |
1162 | if (dev->phy.def->ops->poll_link(&dev->phy)) { |
1163 | if (!netif_carrier_ok(dev->ndev)) { | |
1164 | /* Get new link parameters */ | |
1165 | dev->phy.def->ops->read_link(&dev->phy); | |
1166 | ||
1167 | netif_carrier_on(dev->ndev); | |
1168 | emac_netif_stop(dev); | |
1169 | emac_full_tx_reset(dev); | |
1170 | emac_netif_start(dev); | |
1171 | emac_print_link_status(dev); | |
1172 | } | |
1173 | link_poll_interval = PHY_POLL_LINK_ON; | |
1174 | } else { | |
1175 | if (netif_carrier_ok(dev->ndev)) { | |
1d3bb996 DG |
1176 | netif_carrier_off(dev->ndev); |
1177 | netif_tx_disable(dev->ndev); | |
911b237d | 1178 | emac_reinitialize(dev); |
1d3bb996 DG |
1179 | emac_print_link_status(dev); |
1180 | } | |
1181 | link_poll_interval = PHY_POLL_LINK_OFF; | |
1182 | } | |
1183 | schedule_delayed_work(&dev->link_work, link_poll_interval); | |
61dbcece | 1184 | bail: |
1d3bb996 DG |
1185 | mutex_unlock(&dev->link_lock); |
1186 | } | |
1187 | ||
1188 | static void emac_force_link_update(struct emac_instance *dev) | |
1189 | { | |
1190 | netif_carrier_off(dev->ndev); | |
61dbcece | 1191 | smp_rmb(); |
1d3bb996 DG |
1192 | if (dev->link_polling) { |
1193 | cancel_rearming_delayed_work(&dev->link_work); | |
1194 | if (dev->link_polling) | |
1195 | schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF); | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | /* Process ctx, rtnl_lock semaphore */ | |
1200 | static int emac_close(struct net_device *ndev) | |
1201 | { | |
1202 | struct emac_instance *dev = netdev_priv(ndev); | |
1203 | ||
1204 | DBG(dev, "close" NL); | |
1205 | ||
61dbcece BH |
1206 | if (dev->phy.address >= 0) { |
1207 | dev->link_polling = 0; | |
1d3bb996 | 1208 | cancel_rearming_delayed_work(&dev->link_work); |
61dbcece BH |
1209 | } |
1210 | mutex_lock(&dev->link_lock); | |
1d3bb996 | 1211 | emac_netif_stop(dev); |
61dbcece BH |
1212 | dev->opened = 0; |
1213 | mutex_unlock(&dev->link_lock); | |
1d3bb996 DG |
1214 | |
1215 | emac_rx_disable(dev); | |
1216 | emac_tx_disable(dev); | |
1217 | mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1218 | mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); | |
1219 | mal_poll_del(dev->mal, &dev->commac); | |
1220 | ||
1221 | emac_clean_tx_ring(dev); | |
1222 | emac_clean_rx_ring(dev); | |
1223 | ||
1224 | free_irq(dev->emac_irq, dev); | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static inline u16 emac_tx_csum(struct emac_instance *dev, | |
1230 | struct sk_buff *skb) | |
1231 | { | |
1232 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH && | |
1233 | skb->ip_summed == CHECKSUM_PARTIAL)) { | |
1234 | ++dev->stats.tx_packets_csum; | |
1235 | return EMAC_TX_CTRL_TAH_CSUM; | |
1236 | } | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | static inline int emac_xmit_finish(struct emac_instance *dev, int len) | |
1241 | { | |
1242 | struct emac_regs __iomem *p = dev->emacp; | |
1243 | struct net_device *ndev = dev->ndev; | |
1244 | ||
1245 | /* Send the packet out. If the if makes a significant perf | |
1246 | * difference, then we can store the TMR0 value in "dev" | |
1247 | * instead | |
1248 | */ | |
1249 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
1d3bb996 | 1250 | out_be32(&p->tmr0, EMAC4_TMR0_XMIT); |
07c2c76e | 1251 | else |
1252 | out_be32(&p->tmr0, EMAC_TMR0_XMIT); | |
1d3bb996 DG |
1253 | |
1254 | if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { | |
1255 | netif_stop_queue(ndev); | |
1256 | DBG2(dev, "stopped TX queue" NL); | |
1257 | } | |
1258 | ||
1259 | ndev->trans_start = jiffies; | |
1260 | ++dev->stats.tx_packets; | |
1261 | dev->stats.tx_bytes += len; | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | /* Tx lock BH */ | |
1267 | static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1268 | { | |
1269 | struct emac_instance *dev = netdev_priv(ndev); | |
1270 | unsigned int len = skb->len; | |
1271 | int slot; | |
1272 | ||
1273 | u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | | |
1274 | MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); | |
1275 | ||
1276 | slot = dev->tx_slot++; | |
1277 | if (dev->tx_slot == NUM_TX_BUFF) { | |
1278 | dev->tx_slot = 0; | |
1279 | ctrl |= MAL_TX_CTRL_WRAP; | |
1280 | } | |
1281 | ||
1282 | DBG2(dev, "xmit(%u) %d" NL, len, slot); | |
1283 | ||
1284 | dev->tx_skb[slot] = skb; | |
1285 | dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev, | |
1286 | skb->data, len, | |
1287 | DMA_TO_DEVICE); | |
1288 | dev->tx_desc[slot].data_len = (u16) len; | |
1289 | wmb(); | |
1290 | dev->tx_desc[slot].ctrl = ctrl; | |
1291 | ||
1292 | return emac_xmit_finish(dev, len); | |
1293 | } | |
1294 | ||
1295 | #ifdef CONFIG_IBM_NEW_EMAC_TAH | |
1296 | static inline int emac_xmit_split(struct emac_instance *dev, int slot, | |
1297 | u32 pd, int len, int last, u16 base_ctrl) | |
1298 | { | |
1299 | while (1) { | |
1300 | u16 ctrl = base_ctrl; | |
1301 | int chunk = min(len, MAL_MAX_TX_SIZE); | |
1302 | len -= chunk; | |
1303 | ||
1304 | slot = (slot + 1) % NUM_TX_BUFF; | |
1305 | ||
1306 | if (last && !len) | |
1307 | ctrl |= MAL_TX_CTRL_LAST; | |
1308 | if (slot == NUM_TX_BUFF - 1) | |
1309 | ctrl |= MAL_TX_CTRL_WRAP; | |
1310 | ||
1311 | dev->tx_skb[slot] = NULL; | |
1312 | dev->tx_desc[slot].data_ptr = pd; | |
1313 | dev->tx_desc[slot].data_len = (u16) chunk; | |
1314 | dev->tx_desc[slot].ctrl = ctrl; | |
1315 | ++dev->tx_cnt; | |
1316 | ||
1317 | if (!len) | |
1318 | break; | |
1319 | ||
1320 | pd += chunk; | |
1321 | } | |
1322 | return slot; | |
1323 | } | |
1324 | ||
1325 | /* Tx lock BH disabled (SG version for TAH equipped EMACs) */ | |
1326 | static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) | |
1327 | { | |
1328 | struct emac_instance *dev = netdev_priv(ndev); | |
1329 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
1330 | int len = skb->len, chunk; | |
1331 | int slot, i; | |
1332 | u16 ctrl; | |
1333 | u32 pd; | |
1334 | ||
1335 | /* This is common "fast" path */ | |
1336 | if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) | |
1337 | return emac_start_xmit(skb, ndev); | |
1338 | ||
1339 | len -= skb->data_len; | |
1340 | ||
1341 | /* Note, this is only an *estimation*, we can still run out of empty | |
1342 | * slots because of the additional fragmentation into | |
1343 | * MAL_MAX_TX_SIZE-sized chunks | |
1344 | */ | |
1345 | if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) | |
1346 | goto stop_queue; | |
1347 | ||
1348 | ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | | |
1349 | emac_tx_csum(dev, skb); | |
1350 | slot = dev->tx_slot; | |
1351 | ||
1352 | /* skb data */ | |
1353 | dev->tx_skb[slot] = NULL; | |
1354 | chunk = min(len, MAL_MAX_TX_SIZE); | |
1355 | dev->tx_desc[slot].data_ptr = pd = | |
1356 | dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE); | |
1357 | dev->tx_desc[slot].data_len = (u16) chunk; | |
1358 | len -= chunk; | |
1359 | if (unlikely(len)) | |
1360 | slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, | |
1361 | ctrl); | |
1362 | /* skb fragments */ | |
1363 | for (i = 0; i < nr_frags; ++i) { | |
1364 | struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; | |
1365 | len = frag->size; | |
1366 | ||
1367 | if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) | |
1368 | goto undo_frame; | |
1369 | ||
1370 | pd = dma_map_page(&dev->ofdev->dev, frag->page, frag->page_offset, len, | |
1371 | DMA_TO_DEVICE); | |
1372 | ||
1373 | slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, | |
1374 | ctrl); | |
1375 | } | |
1376 | ||
1377 | DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot); | |
1378 | ||
1379 | /* Attach skb to the last slot so we don't release it too early */ | |
1380 | dev->tx_skb[slot] = skb; | |
1381 | ||
1382 | /* Send the packet out */ | |
1383 | if (dev->tx_slot == NUM_TX_BUFF - 1) | |
1384 | ctrl |= MAL_TX_CTRL_WRAP; | |
1385 | wmb(); | |
1386 | dev->tx_desc[dev->tx_slot].ctrl = ctrl; | |
1387 | dev->tx_slot = (slot + 1) % NUM_TX_BUFF; | |
1388 | ||
1389 | return emac_xmit_finish(dev, skb->len); | |
1390 | ||
1391 | undo_frame: | |
1392 | /* Well, too bad. Our previous estimation was overly optimistic. | |
1393 | * Undo everything. | |
1394 | */ | |
1395 | while (slot != dev->tx_slot) { | |
1396 | dev->tx_desc[slot].ctrl = 0; | |
1397 | --dev->tx_cnt; | |
1398 | if (--slot < 0) | |
1399 | slot = NUM_TX_BUFF - 1; | |
1400 | } | |
1401 | ++dev->estats.tx_undo; | |
1402 | ||
1403 | stop_queue: | |
1404 | netif_stop_queue(ndev); | |
1405 | DBG2(dev, "stopped TX queue" NL); | |
1406 | return 1; | |
1407 | } | |
1408 | #else | |
1409 | # define emac_start_xmit_sg emac_start_xmit | |
1410 | #endif /* !defined(CONFIG_IBM_NEW_EMAC_TAH) */ | |
1411 | ||
1412 | /* Tx lock BHs */ | |
1413 | static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl) | |
1414 | { | |
1415 | struct emac_error_stats *st = &dev->estats; | |
1416 | ||
1417 | DBG(dev, "BD TX error %04x" NL, ctrl); | |
1418 | ||
1419 | ++st->tx_bd_errors; | |
1420 | if (ctrl & EMAC_TX_ST_BFCS) | |
1421 | ++st->tx_bd_bad_fcs; | |
1422 | if (ctrl & EMAC_TX_ST_LCS) | |
1423 | ++st->tx_bd_carrier_loss; | |
1424 | if (ctrl & EMAC_TX_ST_ED) | |
1425 | ++st->tx_bd_excessive_deferral; | |
1426 | if (ctrl & EMAC_TX_ST_EC) | |
1427 | ++st->tx_bd_excessive_collisions; | |
1428 | if (ctrl & EMAC_TX_ST_LC) | |
1429 | ++st->tx_bd_late_collision; | |
1430 | if (ctrl & EMAC_TX_ST_MC) | |
1431 | ++st->tx_bd_multple_collisions; | |
1432 | if (ctrl & EMAC_TX_ST_SC) | |
1433 | ++st->tx_bd_single_collision; | |
1434 | if (ctrl & EMAC_TX_ST_UR) | |
1435 | ++st->tx_bd_underrun; | |
1436 | if (ctrl & EMAC_TX_ST_SQE) | |
1437 | ++st->tx_bd_sqe; | |
1438 | } | |
1439 | ||
1440 | static void emac_poll_tx(void *param) | |
1441 | { | |
1442 | struct emac_instance *dev = param; | |
1443 | u32 bad_mask; | |
1444 | ||
1445 | DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot); | |
1446 | ||
1447 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
1448 | bad_mask = EMAC_IS_BAD_TX_TAH; | |
1449 | else | |
1450 | bad_mask = EMAC_IS_BAD_TX; | |
1451 | ||
1452 | netif_tx_lock_bh(dev->ndev); | |
1453 | if (dev->tx_cnt) { | |
1454 | u16 ctrl; | |
1455 | int slot = dev->ack_slot, n = 0; | |
1456 | again: | |
1457 | ctrl = dev->tx_desc[slot].ctrl; | |
1458 | if (!(ctrl & MAL_TX_CTRL_READY)) { | |
1459 | struct sk_buff *skb = dev->tx_skb[slot]; | |
1460 | ++n; | |
1461 | ||
1462 | if (skb) { | |
1463 | dev_kfree_skb(skb); | |
1464 | dev->tx_skb[slot] = NULL; | |
1465 | } | |
1466 | slot = (slot + 1) % NUM_TX_BUFF; | |
1467 | ||
1468 | if (unlikely(ctrl & bad_mask)) | |
1469 | emac_parse_tx_error(dev, ctrl); | |
1470 | ||
1471 | if (--dev->tx_cnt) | |
1472 | goto again; | |
1473 | } | |
1474 | if (n) { | |
1475 | dev->ack_slot = slot; | |
1476 | if (netif_queue_stopped(dev->ndev) && | |
1477 | dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) | |
1478 | netif_wake_queue(dev->ndev); | |
1479 | ||
1480 | DBG2(dev, "tx %d pkts" NL, n); | |
1481 | } | |
1482 | } | |
1483 | netif_tx_unlock_bh(dev->ndev); | |
1484 | } | |
1485 | ||
1486 | static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot, | |
1487 | int len) | |
1488 | { | |
1489 | struct sk_buff *skb = dev->rx_skb[slot]; | |
1490 | ||
1491 | DBG2(dev, "recycle %d %d" NL, slot, len); | |
1492 | ||
1493 | if (len) | |
1494 | dma_map_single(&dev->ofdev->dev, skb->data - 2, | |
1495 | EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); | |
1496 | ||
1497 | dev->rx_desc[slot].data_len = 0; | |
1498 | wmb(); | |
1499 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | | |
1500 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1501 | } | |
1502 | ||
1503 | static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl) | |
1504 | { | |
1505 | struct emac_error_stats *st = &dev->estats; | |
1506 | ||
1507 | DBG(dev, "BD RX error %04x" NL, ctrl); | |
1508 | ||
1509 | ++st->rx_bd_errors; | |
1510 | if (ctrl & EMAC_RX_ST_OE) | |
1511 | ++st->rx_bd_overrun; | |
1512 | if (ctrl & EMAC_RX_ST_BP) | |
1513 | ++st->rx_bd_bad_packet; | |
1514 | if (ctrl & EMAC_RX_ST_RP) | |
1515 | ++st->rx_bd_runt_packet; | |
1516 | if (ctrl & EMAC_RX_ST_SE) | |
1517 | ++st->rx_bd_short_event; | |
1518 | if (ctrl & EMAC_RX_ST_AE) | |
1519 | ++st->rx_bd_alignment_error; | |
1520 | if (ctrl & EMAC_RX_ST_BFCS) | |
1521 | ++st->rx_bd_bad_fcs; | |
1522 | if (ctrl & EMAC_RX_ST_PTL) | |
1523 | ++st->rx_bd_packet_too_long; | |
1524 | if (ctrl & EMAC_RX_ST_ORE) | |
1525 | ++st->rx_bd_out_of_range; | |
1526 | if (ctrl & EMAC_RX_ST_IRE) | |
1527 | ++st->rx_bd_in_range; | |
1528 | } | |
1529 | ||
1530 | static inline void emac_rx_csum(struct emac_instance *dev, | |
1531 | struct sk_buff *skb, u16 ctrl) | |
1532 | { | |
1533 | #ifdef CONFIG_IBM_NEW_EMAC_TAH | |
1534 | if (!ctrl && dev->tah_dev) { | |
1535 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1536 | ++dev->stats.rx_packets_csum; | |
1537 | } | |
1538 | #endif | |
1539 | } | |
1540 | ||
1541 | static inline int emac_rx_sg_append(struct emac_instance *dev, int slot) | |
1542 | { | |
1543 | if (likely(dev->rx_sg_skb != NULL)) { | |
1544 | int len = dev->rx_desc[slot].data_len; | |
1545 | int tot_len = dev->rx_sg_skb->len + len; | |
1546 | ||
1547 | if (unlikely(tot_len + 2 > dev->rx_skb_size)) { | |
1548 | ++dev->estats.rx_dropped_mtu; | |
1549 | dev_kfree_skb(dev->rx_sg_skb); | |
1550 | dev->rx_sg_skb = NULL; | |
1551 | } else { | |
bef1bc95 | 1552 | cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb), |
1d3bb996 DG |
1553 | dev->rx_skb[slot]->data, len); |
1554 | skb_put(dev->rx_sg_skb, len); | |
1555 | emac_recycle_rx_skb(dev, slot, len); | |
1556 | return 0; | |
1557 | } | |
1558 | } | |
1559 | emac_recycle_rx_skb(dev, slot, 0); | |
1560 | return -1; | |
1561 | } | |
1562 | ||
1563 | /* NAPI poll context */ | |
1564 | static int emac_poll_rx(void *param, int budget) | |
1565 | { | |
1566 | struct emac_instance *dev = param; | |
1567 | int slot = dev->rx_slot, received = 0; | |
1568 | ||
1569 | DBG2(dev, "poll_rx(%d)" NL, budget); | |
1570 | ||
1571 | again: | |
1572 | while (budget > 0) { | |
1573 | int len; | |
1574 | struct sk_buff *skb; | |
1575 | u16 ctrl = dev->rx_desc[slot].ctrl; | |
1576 | ||
1577 | if (ctrl & MAL_RX_CTRL_EMPTY) | |
1578 | break; | |
1579 | ||
1580 | skb = dev->rx_skb[slot]; | |
1581 | mb(); | |
1582 | len = dev->rx_desc[slot].data_len; | |
1583 | ||
1584 | if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) | |
1585 | goto sg; | |
1586 | ||
1587 | ctrl &= EMAC_BAD_RX_MASK; | |
1588 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { | |
1589 | emac_parse_rx_error(dev, ctrl); | |
1590 | ++dev->estats.rx_dropped_error; | |
1591 | emac_recycle_rx_skb(dev, slot, 0); | |
1592 | len = 0; | |
1593 | goto next; | |
1594 | } | |
1595 | ||
1596 | if (len && len < EMAC_RX_COPY_THRESH) { | |
1597 | struct sk_buff *copy_skb = | |
1598 | alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); | |
1599 | if (unlikely(!copy_skb)) | |
1600 | goto oom; | |
1601 | ||
1602 | skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); | |
1603 | cacheable_memcpy(copy_skb->data - 2, skb->data - 2, | |
1604 | len + 2); | |
1605 | emac_recycle_rx_skb(dev, slot, len); | |
1606 | skb = copy_skb; | |
1607 | } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) | |
1608 | goto oom; | |
1609 | ||
1610 | skb_put(skb, len); | |
1611 | push_packet: | |
1612 | skb->dev = dev->ndev; | |
1613 | skb->protocol = eth_type_trans(skb, dev->ndev); | |
1614 | emac_rx_csum(dev, skb, ctrl); | |
1615 | ||
1616 | if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) | |
1617 | ++dev->estats.rx_dropped_stack; | |
1618 | next: | |
1619 | ++dev->stats.rx_packets; | |
1620 | skip: | |
1621 | dev->stats.rx_bytes += len; | |
1622 | slot = (slot + 1) % NUM_RX_BUFF; | |
1623 | --budget; | |
1624 | ++received; | |
1625 | continue; | |
1626 | sg: | |
1627 | if (ctrl & MAL_RX_CTRL_FIRST) { | |
1628 | BUG_ON(dev->rx_sg_skb); | |
1629 | if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { | |
1630 | DBG(dev, "rx OOM %d" NL, slot); | |
1631 | ++dev->estats.rx_dropped_oom; | |
1632 | emac_recycle_rx_skb(dev, slot, 0); | |
1633 | } else { | |
1634 | dev->rx_sg_skb = skb; | |
1635 | skb_put(skb, len); | |
1636 | } | |
1637 | } else if (!emac_rx_sg_append(dev, slot) && | |
1638 | (ctrl & MAL_RX_CTRL_LAST)) { | |
1639 | ||
1640 | skb = dev->rx_sg_skb; | |
1641 | dev->rx_sg_skb = NULL; | |
1642 | ||
1643 | ctrl &= EMAC_BAD_RX_MASK; | |
1644 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { | |
1645 | emac_parse_rx_error(dev, ctrl); | |
1646 | ++dev->estats.rx_dropped_error; | |
1647 | dev_kfree_skb(skb); | |
1648 | len = 0; | |
1649 | } else | |
1650 | goto push_packet; | |
1651 | } | |
1652 | goto skip; | |
1653 | oom: | |
1654 | DBG(dev, "rx OOM %d" NL, slot); | |
1655 | /* Drop the packet and recycle skb */ | |
1656 | ++dev->estats.rx_dropped_oom; | |
1657 | emac_recycle_rx_skb(dev, slot, 0); | |
1658 | goto next; | |
1659 | } | |
1660 | ||
1661 | if (received) { | |
1662 | DBG2(dev, "rx %d BDs" NL, received); | |
1663 | dev->rx_slot = slot; | |
1664 | } | |
1665 | ||
1666 | if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) { | |
1667 | mb(); | |
1668 | if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { | |
1669 | DBG2(dev, "rx restart" NL); | |
1670 | received = 0; | |
1671 | goto again; | |
1672 | } | |
1673 | ||
1674 | if (dev->rx_sg_skb) { | |
1675 | DBG2(dev, "dropping partial rx packet" NL); | |
1676 | ++dev->estats.rx_dropped_error; | |
1677 | dev_kfree_skb(dev->rx_sg_skb); | |
1678 | dev->rx_sg_skb = NULL; | |
1679 | } | |
1680 | ||
1681 | clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
1682 | mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1683 | emac_rx_enable(dev); | |
1684 | dev->rx_slot = 0; | |
1685 | } | |
1686 | return received; | |
1687 | } | |
1688 | ||
1689 | /* NAPI poll context */ | |
1690 | static int emac_peek_rx(void *param) | |
1691 | { | |
1692 | struct emac_instance *dev = param; | |
1693 | ||
1694 | return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); | |
1695 | } | |
1696 | ||
1697 | /* NAPI poll context */ | |
1698 | static int emac_peek_rx_sg(void *param) | |
1699 | { | |
1700 | struct emac_instance *dev = param; | |
1701 | ||
1702 | int slot = dev->rx_slot; | |
1703 | while (1) { | |
1704 | u16 ctrl = dev->rx_desc[slot].ctrl; | |
1705 | if (ctrl & MAL_RX_CTRL_EMPTY) | |
1706 | return 0; | |
1707 | else if (ctrl & MAL_RX_CTRL_LAST) | |
1708 | return 1; | |
1709 | ||
1710 | slot = (slot + 1) % NUM_RX_BUFF; | |
1711 | ||
1712 | /* I'm just being paranoid here :) */ | |
1713 | if (unlikely(slot == dev->rx_slot)) | |
1714 | return 0; | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | /* Hard IRQ */ | |
1719 | static void emac_rxde(void *param) | |
1720 | { | |
1721 | struct emac_instance *dev = param; | |
1722 | ||
1723 | ++dev->estats.rx_stopped; | |
1724 | emac_rx_disable_async(dev); | |
1725 | } | |
1726 | ||
1727 | /* Hard IRQ */ | |
1728 | static irqreturn_t emac_irq(int irq, void *dev_instance) | |
1729 | { | |
1730 | struct emac_instance *dev = dev_instance; | |
1731 | struct emac_regs __iomem *p = dev->emacp; | |
1732 | struct emac_error_stats *st = &dev->estats; | |
1733 | u32 isr; | |
1734 | ||
1735 | spin_lock(&dev->lock); | |
1736 | ||
1737 | isr = in_be32(&p->isr); | |
1738 | out_be32(&p->isr, isr); | |
1739 | ||
1740 | DBG(dev, "isr = %08x" NL, isr); | |
1741 | ||
1742 | if (isr & EMAC4_ISR_TXPE) | |
1743 | ++st->tx_parity; | |
1744 | if (isr & EMAC4_ISR_RXPE) | |
1745 | ++st->rx_parity; | |
1746 | if (isr & EMAC4_ISR_TXUE) | |
1747 | ++st->tx_underrun; | |
1748 | if (isr & EMAC4_ISR_RXOE) | |
1749 | ++st->rx_fifo_overrun; | |
1750 | if (isr & EMAC_ISR_OVR) | |
1751 | ++st->rx_overrun; | |
1752 | if (isr & EMAC_ISR_BP) | |
1753 | ++st->rx_bad_packet; | |
1754 | if (isr & EMAC_ISR_RP) | |
1755 | ++st->rx_runt_packet; | |
1756 | if (isr & EMAC_ISR_SE) | |
1757 | ++st->rx_short_event; | |
1758 | if (isr & EMAC_ISR_ALE) | |
1759 | ++st->rx_alignment_error; | |
1760 | if (isr & EMAC_ISR_BFCS) | |
1761 | ++st->rx_bad_fcs; | |
1762 | if (isr & EMAC_ISR_PTLE) | |
1763 | ++st->rx_packet_too_long; | |
1764 | if (isr & EMAC_ISR_ORE) | |
1765 | ++st->rx_out_of_range; | |
1766 | if (isr & EMAC_ISR_IRE) | |
1767 | ++st->rx_in_range; | |
1768 | if (isr & EMAC_ISR_SQE) | |
1769 | ++st->tx_sqe; | |
1770 | if (isr & EMAC_ISR_TE) | |
1771 | ++st->tx_errors; | |
1772 | ||
1773 | spin_unlock(&dev->lock); | |
1774 | ||
1775 | return IRQ_HANDLED; | |
1776 | } | |
1777 | ||
1778 | static struct net_device_stats *emac_stats(struct net_device *ndev) | |
1779 | { | |
1780 | struct emac_instance *dev = netdev_priv(ndev); | |
1781 | struct emac_stats *st = &dev->stats; | |
1782 | struct emac_error_stats *est = &dev->estats; | |
1783 | struct net_device_stats *nst = &dev->nstats; | |
1784 | unsigned long flags; | |
1785 | ||
1786 | DBG2(dev, "stats" NL); | |
1787 | ||
1788 | /* Compute "legacy" statistics */ | |
1789 | spin_lock_irqsave(&dev->lock, flags); | |
1790 | nst->rx_packets = (unsigned long)st->rx_packets; | |
1791 | nst->rx_bytes = (unsigned long)st->rx_bytes; | |
1792 | nst->tx_packets = (unsigned long)st->tx_packets; | |
1793 | nst->tx_bytes = (unsigned long)st->tx_bytes; | |
1794 | nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + | |
1795 | est->rx_dropped_error + | |
1796 | est->rx_dropped_resize + | |
1797 | est->rx_dropped_mtu); | |
1798 | nst->tx_dropped = (unsigned long)est->tx_dropped; | |
1799 | ||
1800 | nst->rx_errors = (unsigned long)est->rx_bd_errors; | |
1801 | nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + | |
1802 | est->rx_fifo_overrun + | |
1803 | est->rx_overrun); | |
1804 | nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + | |
1805 | est->rx_alignment_error); | |
1806 | nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + | |
1807 | est->rx_bad_fcs); | |
1808 | nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + | |
1809 | est->rx_bd_short_event + | |
1810 | est->rx_bd_packet_too_long + | |
1811 | est->rx_bd_out_of_range + | |
1812 | est->rx_bd_in_range + | |
1813 | est->rx_runt_packet + | |
1814 | est->rx_short_event + | |
1815 | est->rx_packet_too_long + | |
1816 | est->rx_out_of_range + | |
1817 | est->rx_in_range); | |
1818 | ||
1819 | nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); | |
1820 | nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + | |
1821 | est->tx_underrun); | |
1822 | nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; | |
1823 | nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + | |
1824 | est->tx_bd_excessive_collisions + | |
1825 | est->tx_bd_late_collision + | |
1826 | est->tx_bd_multple_collisions); | |
1827 | spin_unlock_irqrestore(&dev->lock, flags); | |
1828 | return nst; | |
1829 | } | |
1830 | ||
1831 | static struct mal_commac_ops emac_commac_ops = { | |
1832 | .poll_tx = &emac_poll_tx, | |
1833 | .poll_rx = &emac_poll_rx, | |
1834 | .peek_rx = &emac_peek_rx, | |
1835 | .rxde = &emac_rxde, | |
1836 | }; | |
1837 | ||
1838 | static struct mal_commac_ops emac_commac_sg_ops = { | |
1839 | .poll_tx = &emac_poll_tx, | |
1840 | .poll_rx = &emac_poll_rx, | |
1841 | .peek_rx = &emac_peek_rx_sg, | |
1842 | .rxde = &emac_rxde, | |
1843 | }; | |
1844 | ||
1845 | /* Ethtool support */ | |
1846 | static int emac_ethtool_get_settings(struct net_device *ndev, | |
1847 | struct ethtool_cmd *cmd) | |
1848 | { | |
1849 | struct emac_instance *dev = netdev_priv(ndev); | |
1850 | ||
1851 | cmd->supported = dev->phy.features; | |
1852 | cmd->port = PORT_MII; | |
1853 | cmd->phy_address = dev->phy.address; | |
1854 | cmd->transceiver = | |
1855 | dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL; | |
1856 | ||
1857 | mutex_lock(&dev->link_lock); | |
1858 | cmd->advertising = dev->phy.advertising; | |
1859 | cmd->autoneg = dev->phy.autoneg; | |
1860 | cmd->speed = dev->phy.speed; | |
1861 | cmd->duplex = dev->phy.duplex; | |
1862 | mutex_unlock(&dev->link_lock); | |
1863 | ||
1864 | return 0; | |
1865 | } | |
1866 | ||
1867 | static int emac_ethtool_set_settings(struct net_device *ndev, | |
1868 | struct ethtool_cmd *cmd) | |
1869 | { | |
1870 | struct emac_instance *dev = netdev_priv(ndev); | |
1871 | u32 f = dev->phy.features; | |
1872 | ||
1873 | DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL, | |
1874 | cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising); | |
1875 | ||
1876 | /* Basic sanity checks */ | |
1877 | if (dev->phy.address < 0) | |
1878 | return -EOPNOTSUPP; | |
1879 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) | |
1880 | return -EINVAL; | |
1881 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
1882 | return -EINVAL; | |
1883 | if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) | |
1884 | return -EINVAL; | |
1885 | ||
1886 | if (cmd->autoneg == AUTONEG_DISABLE) { | |
1887 | switch (cmd->speed) { | |
1888 | case SPEED_10: | |
1889 | if (cmd->duplex == DUPLEX_HALF | |
1890 | && !(f & SUPPORTED_10baseT_Half)) | |
1891 | return -EINVAL; | |
1892 | if (cmd->duplex == DUPLEX_FULL | |
1893 | && !(f & SUPPORTED_10baseT_Full)) | |
1894 | return -EINVAL; | |
1895 | break; | |
1896 | case SPEED_100: | |
1897 | if (cmd->duplex == DUPLEX_HALF | |
1898 | && !(f & SUPPORTED_100baseT_Half)) | |
1899 | return -EINVAL; | |
1900 | if (cmd->duplex == DUPLEX_FULL | |
1901 | && !(f & SUPPORTED_100baseT_Full)) | |
1902 | return -EINVAL; | |
1903 | break; | |
1904 | case SPEED_1000: | |
1905 | if (cmd->duplex == DUPLEX_HALF | |
1906 | && !(f & SUPPORTED_1000baseT_Half)) | |
1907 | return -EINVAL; | |
1908 | if (cmd->duplex == DUPLEX_FULL | |
1909 | && !(f & SUPPORTED_1000baseT_Full)) | |
1910 | return -EINVAL; | |
1911 | break; | |
1912 | default: | |
1913 | return -EINVAL; | |
1914 | } | |
1915 | ||
1916 | mutex_lock(&dev->link_lock); | |
1917 | dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed, | |
1918 | cmd->duplex); | |
1919 | mutex_unlock(&dev->link_lock); | |
1920 | ||
1921 | } else { | |
1922 | if (!(f & SUPPORTED_Autoneg)) | |
1923 | return -EINVAL; | |
1924 | ||
1925 | mutex_lock(&dev->link_lock); | |
1926 | dev->phy.def->ops->setup_aneg(&dev->phy, | |
1927 | (cmd->advertising & f) | | |
1928 | (dev->phy.advertising & | |
1929 | (ADVERTISED_Pause | | |
1930 | ADVERTISED_Asym_Pause))); | |
1931 | mutex_unlock(&dev->link_lock); | |
1932 | } | |
1933 | emac_force_link_update(dev); | |
1934 | ||
1935 | return 0; | |
1936 | } | |
1937 | ||
1938 | static void emac_ethtool_get_ringparam(struct net_device *ndev, | |
1939 | struct ethtool_ringparam *rp) | |
1940 | { | |
1941 | rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; | |
1942 | rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; | |
1943 | } | |
1944 | ||
1945 | static void emac_ethtool_get_pauseparam(struct net_device *ndev, | |
1946 | struct ethtool_pauseparam *pp) | |
1947 | { | |
1948 | struct emac_instance *dev = netdev_priv(ndev); | |
1949 | ||
1950 | mutex_lock(&dev->link_lock); | |
1951 | if ((dev->phy.features & SUPPORTED_Autoneg) && | |
1952 | (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) | |
1953 | pp->autoneg = 1; | |
1954 | ||
1955 | if (dev->phy.duplex == DUPLEX_FULL) { | |
1956 | if (dev->phy.pause) | |
1957 | pp->rx_pause = pp->tx_pause = 1; | |
1958 | else if (dev->phy.asym_pause) | |
1959 | pp->tx_pause = 1; | |
1960 | } | |
1961 | mutex_unlock(&dev->link_lock); | |
1962 | } | |
1963 | ||
1964 | static u32 emac_ethtool_get_rx_csum(struct net_device *ndev) | |
1965 | { | |
1966 | struct emac_instance *dev = netdev_priv(ndev); | |
1967 | ||
eb4d84f1 | 1968 | return dev->tah_dev != NULL; |
1d3bb996 DG |
1969 | } |
1970 | ||
1971 | static int emac_get_regs_len(struct emac_instance *dev) | |
1972 | { | |
1973 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
1974 | return sizeof(struct emac_ethtool_regs_subhdr) + | |
1975 | EMAC4_ETHTOOL_REGS_SIZE; | |
1976 | else | |
1977 | return sizeof(struct emac_ethtool_regs_subhdr) + | |
1978 | EMAC_ETHTOOL_REGS_SIZE; | |
1979 | } | |
1980 | ||
1981 | static int emac_ethtool_get_regs_len(struct net_device *ndev) | |
1982 | { | |
1983 | struct emac_instance *dev = netdev_priv(ndev); | |
1984 | int size; | |
1985 | ||
1986 | size = sizeof(struct emac_ethtool_regs_hdr) + | |
1987 | emac_get_regs_len(dev) + mal_get_regs_len(dev->mal); | |
1988 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
1989 | size += zmii_get_regs_len(dev->zmii_dev); | |
1990 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
1991 | size += rgmii_get_regs_len(dev->rgmii_dev); | |
1992 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
1993 | size += tah_get_regs_len(dev->tah_dev); | |
1994 | ||
1995 | return size; | |
1996 | } | |
1997 | ||
1998 | static void *emac_dump_regs(struct emac_instance *dev, void *buf) | |
1999 | { | |
2000 | struct emac_ethtool_regs_subhdr *hdr = buf; | |
2001 | ||
2002 | hdr->index = dev->cell_index; | |
2003 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) { | |
2004 | hdr->version = EMAC4_ETHTOOL_REGS_VER; | |
2005 | memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE); | |
2006 | return ((void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE); | |
2007 | } else { | |
2008 | hdr->version = EMAC_ETHTOOL_REGS_VER; | |
2009 | memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE); | |
2010 | return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE); | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | static void emac_ethtool_get_regs(struct net_device *ndev, | |
2015 | struct ethtool_regs *regs, void *buf) | |
2016 | { | |
2017 | struct emac_instance *dev = netdev_priv(ndev); | |
2018 | struct emac_ethtool_regs_hdr *hdr = buf; | |
2019 | ||
2020 | hdr->components = 0; | |
2021 | buf = hdr + 1; | |
2022 | ||
2023 | buf = mal_dump_regs(dev->mal, buf); | |
2024 | buf = emac_dump_regs(dev, buf); | |
2025 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) { | |
2026 | hdr->components |= EMAC_ETHTOOL_REGS_ZMII; | |
2027 | buf = zmii_dump_regs(dev->zmii_dev, buf); | |
2028 | } | |
2029 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { | |
2030 | hdr->components |= EMAC_ETHTOOL_REGS_RGMII; | |
2031 | buf = rgmii_dump_regs(dev->rgmii_dev, buf); | |
2032 | } | |
2033 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) { | |
2034 | hdr->components |= EMAC_ETHTOOL_REGS_TAH; | |
2035 | buf = tah_dump_regs(dev->tah_dev, buf); | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | static int emac_ethtool_nway_reset(struct net_device *ndev) | |
2040 | { | |
2041 | struct emac_instance *dev = netdev_priv(ndev); | |
2042 | int res = 0; | |
2043 | ||
2044 | DBG(dev, "nway_reset" NL); | |
2045 | ||
2046 | if (dev->phy.address < 0) | |
2047 | return -EOPNOTSUPP; | |
2048 | ||
2049 | mutex_lock(&dev->link_lock); | |
2050 | if (!dev->phy.autoneg) { | |
2051 | res = -EINVAL; | |
2052 | goto out; | |
2053 | } | |
2054 | ||
2055 | dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); | |
2056 | out: | |
2057 | mutex_unlock(&dev->link_lock); | |
2058 | emac_force_link_update(dev); | |
2059 | return res; | |
2060 | } | |
2061 | ||
2062 | static int emac_ethtool_get_stats_count(struct net_device *ndev) | |
2063 | { | |
2064 | return EMAC_ETHTOOL_STATS_COUNT; | |
2065 | } | |
2066 | ||
2067 | static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, | |
2068 | u8 * buf) | |
2069 | { | |
2070 | if (stringset == ETH_SS_STATS) | |
2071 | memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); | |
2072 | } | |
2073 | ||
2074 | static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, | |
2075 | struct ethtool_stats *estats, | |
2076 | u64 * tmp_stats) | |
2077 | { | |
2078 | struct emac_instance *dev = netdev_priv(ndev); | |
2079 | ||
2080 | memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); | |
2081 | tmp_stats += sizeof(dev->stats) / sizeof(u64); | |
2082 | memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); | |
2083 | } | |
2084 | ||
2085 | static void emac_ethtool_get_drvinfo(struct net_device *ndev, | |
2086 | struct ethtool_drvinfo *info) | |
2087 | { | |
2088 | struct emac_instance *dev = netdev_priv(ndev); | |
2089 | ||
2090 | strcpy(info->driver, "ibm_emac"); | |
2091 | strcpy(info->version, DRV_VERSION); | |
2092 | info->fw_version[0] = '\0'; | |
2093 | sprintf(info->bus_info, "PPC 4xx EMAC-%d %s", | |
2094 | dev->cell_index, dev->ofdev->node->full_name); | |
2095 | info->n_stats = emac_ethtool_get_stats_count(ndev); | |
2096 | info->regdump_len = emac_ethtool_get_regs_len(ndev); | |
2097 | } | |
2098 | ||
2099 | static const struct ethtool_ops emac_ethtool_ops = { | |
2100 | .get_settings = emac_ethtool_get_settings, | |
2101 | .set_settings = emac_ethtool_set_settings, | |
2102 | .get_drvinfo = emac_ethtool_get_drvinfo, | |
2103 | ||
2104 | .get_regs_len = emac_ethtool_get_regs_len, | |
2105 | .get_regs = emac_ethtool_get_regs, | |
2106 | ||
2107 | .nway_reset = emac_ethtool_nway_reset, | |
2108 | ||
2109 | .get_ringparam = emac_ethtool_get_ringparam, | |
2110 | .get_pauseparam = emac_ethtool_get_pauseparam, | |
2111 | ||
2112 | .get_rx_csum = emac_ethtool_get_rx_csum, | |
2113 | ||
2114 | .get_strings = emac_ethtool_get_strings, | |
2115 | .get_stats_count = emac_ethtool_get_stats_count, | |
2116 | .get_ethtool_stats = emac_ethtool_get_ethtool_stats, | |
2117 | ||
2118 | .get_link = ethtool_op_get_link, | |
2119 | .get_tx_csum = ethtool_op_get_tx_csum, | |
2120 | .get_sg = ethtool_op_get_sg, | |
2121 | }; | |
2122 | ||
2123 | static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) | |
2124 | { | |
2125 | struct emac_instance *dev = netdev_priv(ndev); | |
2126 | uint16_t *data = (uint16_t *) & rq->ifr_ifru; | |
2127 | ||
2128 | DBG(dev, "ioctl %08x" NL, cmd); | |
2129 | ||
2130 | if (dev->phy.address < 0) | |
2131 | return -EOPNOTSUPP; | |
2132 | ||
2133 | switch (cmd) { | |
2134 | case SIOCGMIIPHY: | |
2135 | case SIOCDEVPRIVATE: | |
2136 | data[0] = dev->phy.address; | |
2137 | /* Fall through */ | |
2138 | case SIOCGMIIREG: | |
2139 | case SIOCDEVPRIVATE + 1: | |
2140 | data[3] = emac_mdio_read(ndev, dev->phy.address, data[1]); | |
2141 | return 0; | |
2142 | ||
2143 | case SIOCSMIIREG: | |
2144 | case SIOCDEVPRIVATE + 2: | |
2145 | if (!capable(CAP_NET_ADMIN)) | |
2146 | return -EPERM; | |
2147 | emac_mdio_write(ndev, dev->phy.address, data[1], data[2]); | |
2148 | return 0; | |
2149 | default: | |
2150 | return -EOPNOTSUPP; | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | struct emac_depentry { | |
2155 | u32 phandle; | |
2156 | struct device_node *node; | |
2157 | struct of_device *ofdev; | |
2158 | void *drvdata; | |
2159 | }; | |
2160 | ||
2161 | #define EMAC_DEP_MAL_IDX 0 | |
2162 | #define EMAC_DEP_ZMII_IDX 1 | |
2163 | #define EMAC_DEP_RGMII_IDX 2 | |
2164 | #define EMAC_DEP_TAH_IDX 3 | |
2165 | #define EMAC_DEP_MDIO_IDX 4 | |
2166 | #define EMAC_DEP_PREV_IDX 5 | |
2167 | #define EMAC_DEP_COUNT 6 | |
2168 | ||
2169 | static int __devinit emac_check_deps(struct emac_instance *dev, | |
2170 | struct emac_depentry *deps) | |
2171 | { | |
2172 | int i, there = 0; | |
2173 | struct device_node *np; | |
2174 | ||
2175 | for (i = 0; i < EMAC_DEP_COUNT; i++) { | |
2176 | /* no dependency on that item, allright */ | |
2177 | if (deps[i].phandle == 0) { | |
2178 | there++; | |
2179 | continue; | |
2180 | } | |
2181 | /* special case for blist as the dependency might go away */ | |
2182 | if (i == EMAC_DEP_PREV_IDX) { | |
2183 | np = *(dev->blist - 1); | |
2184 | if (np == NULL) { | |
2185 | deps[i].phandle = 0; | |
2186 | there++; | |
2187 | continue; | |
2188 | } | |
2189 | if (deps[i].node == NULL) | |
2190 | deps[i].node = of_node_get(np); | |
2191 | } | |
2192 | if (deps[i].node == NULL) | |
2193 | deps[i].node = of_find_node_by_phandle(deps[i].phandle); | |
2194 | if (deps[i].node == NULL) | |
2195 | continue; | |
2196 | if (deps[i].ofdev == NULL) | |
2197 | deps[i].ofdev = of_find_device_by_node(deps[i].node); | |
2198 | if (deps[i].ofdev == NULL) | |
2199 | continue; | |
2200 | if (deps[i].drvdata == NULL) | |
2201 | deps[i].drvdata = dev_get_drvdata(&deps[i].ofdev->dev); | |
2202 | if (deps[i].drvdata != NULL) | |
2203 | there++; | |
2204 | } | |
2205 | return (there == EMAC_DEP_COUNT); | |
2206 | } | |
2207 | ||
2208 | static void emac_put_deps(struct emac_instance *dev) | |
2209 | { | |
2210 | if (dev->mal_dev) | |
2211 | of_dev_put(dev->mal_dev); | |
2212 | if (dev->zmii_dev) | |
2213 | of_dev_put(dev->zmii_dev); | |
2214 | if (dev->rgmii_dev) | |
2215 | of_dev_put(dev->rgmii_dev); | |
2216 | if (dev->mdio_dev) | |
2217 | of_dev_put(dev->mdio_dev); | |
2218 | if (dev->tah_dev) | |
2219 | of_dev_put(dev->tah_dev); | |
2220 | } | |
2221 | ||
2222 | static int __devinit emac_of_bus_notify(struct notifier_block *nb, | |
2223 | unsigned long action, void *data) | |
2224 | { | |
2225 | /* We are only intereted in device addition */ | |
2226 | if (action == BUS_NOTIFY_BOUND_DRIVER) | |
2227 | wake_up_all(&emac_probe_wait); | |
2228 | return 0; | |
2229 | } | |
2230 | ||
2231 | static struct notifier_block emac_of_bus_notifier = { | |
2232 | .notifier_call = emac_of_bus_notify | |
2233 | }; | |
2234 | ||
2235 | static int __devinit emac_wait_deps(struct emac_instance *dev) | |
2236 | { | |
2237 | struct emac_depentry deps[EMAC_DEP_COUNT]; | |
2238 | int i, err; | |
2239 | ||
2240 | memset(&deps, 0, sizeof(deps)); | |
2241 | ||
2242 | deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph; | |
2243 | deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph; | |
2244 | deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph; | |
2245 | if (dev->tah_ph) | |
2246 | deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph; | |
2247 | if (dev->mdio_ph) | |
2248 | deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph; | |
2249 | if (dev->blist && dev->blist > emac_boot_list) | |
2250 | deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu; | |
2251 | bus_register_notifier(&of_platform_bus_type, &emac_of_bus_notifier); | |
2252 | wait_event_timeout(emac_probe_wait, | |
2253 | emac_check_deps(dev, deps), | |
2254 | EMAC_PROBE_DEP_TIMEOUT); | |
2255 | bus_unregister_notifier(&of_platform_bus_type, &emac_of_bus_notifier); | |
2256 | err = emac_check_deps(dev, deps) ? 0 : -ENODEV; | |
2257 | for (i = 0; i < EMAC_DEP_COUNT; i++) { | |
2258 | if (deps[i].node) | |
2259 | of_node_put(deps[i].node); | |
2260 | if (err && deps[i].ofdev) | |
2261 | of_dev_put(deps[i].ofdev); | |
2262 | } | |
2263 | if (err == 0) { | |
2264 | dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev; | |
2265 | dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev; | |
2266 | dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev; | |
2267 | dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev; | |
2268 | dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev; | |
2269 | } | |
2270 | if (deps[EMAC_DEP_PREV_IDX].ofdev) | |
2271 | of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev); | |
2272 | return err; | |
2273 | } | |
2274 | ||
2275 | static int __devinit emac_read_uint_prop(struct device_node *np, const char *name, | |
2276 | u32 *val, int fatal) | |
2277 | { | |
2278 | int len; | |
2279 | const u32 *prop = of_get_property(np, name, &len); | |
2280 | if (prop == NULL || len < sizeof(u32)) { | |
2281 | if (fatal) | |
2282 | printk(KERN_ERR "%s: missing %s property\n", | |
2283 | np->full_name, name); | |
2284 | return -ENODEV; | |
2285 | } | |
2286 | *val = *prop; | |
2287 | return 0; | |
2288 | } | |
2289 | ||
2290 | static int __devinit emac_init_phy(struct emac_instance *dev) | |
2291 | { | |
2292 | struct device_node *np = dev->ofdev->node; | |
2293 | struct net_device *ndev = dev->ndev; | |
2294 | u32 phy_map, adv; | |
2295 | int i; | |
2296 | ||
2297 | dev->phy.dev = ndev; | |
2298 | dev->phy.mode = dev->phy_mode; | |
2299 | ||
2300 | /* PHY-less configuration. | |
2301 | * XXX I probably should move these settings to the dev tree | |
2302 | */ | |
2303 | if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) { | |
2304 | emac_reset(dev); | |
2305 | ||
2306 | /* PHY-less configuration. | |
2307 | * XXX I probably should move these settings to the dev tree | |
2308 | */ | |
2309 | dev->phy.address = -1; | |
2310 | dev->phy.features = SUPPORTED_100baseT_Full | SUPPORTED_MII; | |
2311 | dev->phy.pause = 1; | |
2312 | ||
2313 | return 0; | |
2314 | } | |
2315 | ||
2316 | mutex_lock(&emac_phy_map_lock); | |
2317 | phy_map = dev->phy_map | busy_phy_map; | |
2318 | ||
2319 | DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map); | |
2320 | ||
2321 | dev->phy.mdio_read = emac_mdio_read; | |
2322 | dev->phy.mdio_write = emac_mdio_write; | |
2323 | ||
2324 | /* Configure EMAC with defaults so we can at least use MDIO | |
2325 | * This is needed mostly for 440GX | |
2326 | */ | |
2327 | if (emac_phy_gpcs(dev->phy.mode)) { | |
2328 | /* XXX | |
2329 | * Make GPCS PHY address equal to EMAC index. | |
2330 | * We probably should take into account busy_phy_map | |
2331 | * and/or phy_map here. | |
2332 | * | |
2333 | * Note that the busy_phy_map is currently global | |
2334 | * while it should probably be per-ASIC... | |
2335 | */ | |
2336 | dev->phy.address = dev->cell_index; | |
2337 | } | |
2338 | ||
2339 | emac_configure(dev); | |
2340 | ||
2341 | if (dev->phy_address != 0xffffffff) | |
2342 | phy_map = ~(1 << dev->phy_address); | |
2343 | ||
2344 | for (i = 0; i < 0x20; phy_map >>= 1, ++i) | |
2345 | if (!(phy_map & 1)) { | |
2346 | int r; | |
2347 | busy_phy_map |= 1 << i; | |
2348 | ||
2349 | /* Quick check if there is a PHY at the address */ | |
2350 | r = emac_mdio_read(dev->ndev, i, MII_BMCR); | |
2351 | if (r == 0xffff || r < 0) | |
2352 | continue; | |
2353 | if (!emac_mii_phy_probe(&dev->phy, i)) | |
2354 | break; | |
2355 | } | |
2356 | mutex_unlock(&emac_phy_map_lock); | |
2357 | if (i == 0x20) { | |
2358 | printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name); | |
2359 | return -ENXIO; | |
2360 | } | |
2361 | ||
2362 | /* Init PHY */ | |
2363 | if (dev->phy.def->ops->init) | |
2364 | dev->phy.def->ops->init(&dev->phy); | |
2365 | ||
2366 | /* Disable any PHY features not supported by the platform */ | |
2367 | dev->phy.def->features &= ~dev->phy_feat_exc; | |
2368 | ||
2369 | /* Setup initial link parameters */ | |
2370 | if (dev->phy.features & SUPPORTED_Autoneg) { | |
2371 | adv = dev->phy.features; | |
2372 | if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x)) | |
2373 | adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; | |
2374 | /* Restart autonegotiation */ | |
2375 | dev->phy.def->ops->setup_aneg(&dev->phy, adv); | |
2376 | } else { | |
2377 | u32 f = dev->phy.def->features; | |
2378 | int speed = SPEED_10, fd = DUPLEX_HALF; | |
2379 | ||
2380 | /* Select highest supported speed/duplex */ | |
2381 | if (f & SUPPORTED_1000baseT_Full) { | |
2382 | speed = SPEED_1000; | |
2383 | fd = DUPLEX_FULL; | |
2384 | } else if (f & SUPPORTED_1000baseT_Half) | |
2385 | speed = SPEED_1000; | |
2386 | else if (f & SUPPORTED_100baseT_Full) { | |
2387 | speed = SPEED_100; | |
2388 | fd = DUPLEX_FULL; | |
2389 | } else if (f & SUPPORTED_100baseT_Half) | |
2390 | speed = SPEED_100; | |
2391 | else if (f & SUPPORTED_10baseT_Full) | |
2392 | fd = DUPLEX_FULL; | |
2393 | ||
2394 | /* Force link parameters */ | |
2395 | dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); | |
2396 | } | |
2397 | return 0; | |
2398 | } | |
2399 | ||
2400 | static int __devinit emac_init_config(struct emac_instance *dev) | |
2401 | { | |
2402 | struct device_node *np = dev->ofdev->node; | |
2403 | const void *p; | |
2404 | unsigned int plen; | |
2405 | const char *pm, *phy_modes[] = { | |
2406 | [PHY_MODE_NA] = "", | |
2407 | [PHY_MODE_MII] = "mii", | |
2408 | [PHY_MODE_RMII] = "rmii", | |
2409 | [PHY_MODE_SMII] = "smii", | |
2410 | [PHY_MODE_RGMII] = "rgmii", | |
2411 | [PHY_MODE_TBI] = "tbi", | |
2412 | [PHY_MODE_GMII] = "gmii", | |
2413 | [PHY_MODE_RTBI] = "rtbi", | |
2414 | [PHY_MODE_SGMII] = "sgmii", | |
2415 | }; | |
2416 | ||
2417 | /* Read config from device-tree */ | |
2418 | if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1)) | |
2419 | return -ENXIO; | |
2420 | if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1)) | |
2421 | return -ENXIO; | |
2422 | if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1)) | |
2423 | return -ENXIO; | |
2424 | if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1)) | |
2425 | return -ENXIO; | |
2426 | if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0)) | |
2427 | dev->max_mtu = 1500; | |
2428 | if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0)) | |
2429 | dev->rx_fifo_size = 2048; | |
2430 | if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0)) | |
2431 | dev->tx_fifo_size = 2048; | |
2432 | if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0)) | |
2433 | dev->rx_fifo_size_gige = dev->rx_fifo_size; | |
2434 | if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0)) | |
2435 | dev->tx_fifo_size_gige = dev->tx_fifo_size; | |
2436 | if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0)) | |
2437 | dev->phy_address = 0xffffffff; | |
2438 | if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0)) | |
2439 | dev->phy_map = 0xffffffff; | |
2440 | if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1)) | |
2441 | return -ENXIO; | |
2442 | if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0)) | |
2443 | dev->tah_ph = 0; | |
2444 | if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0)) | |
63b6cad7 | 2445 | dev->tah_port = 0; |
1d3bb996 DG |
2446 | if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0)) |
2447 | dev->mdio_ph = 0; | |
2448 | if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0)) | |
2449 | dev->zmii_ph = 0;; | |
2450 | if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0)) | |
2451 | dev->zmii_port = 0xffffffff;; | |
2452 | if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0)) | |
2453 | dev->rgmii_ph = 0;; | |
2454 | if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0)) | |
2455 | dev->rgmii_port = 0xffffffff;; | |
2456 | if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0)) | |
2457 | dev->fifo_entry_size = 16; | |
2458 | if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0)) | |
2459 | dev->mal_burst_size = 256; | |
2460 | ||
2461 | /* PHY mode needs some decoding */ | |
2462 | dev->phy_mode = PHY_MODE_NA; | |
2463 | pm = of_get_property(np, "phy-mode", &plen); | |
2464 | if (pm != NULL) { | |
2465 | int i; | |
2466 | for (i = 0; i < ARRAY_SIZE(phy_modes); i++) | |
2467 | if (!strcasecmp(pm, phy_modes[i])) { | |
2468 | dev->phy_mode = i; | |
2469 | break; | |
2470 | } | |
2471 | } | |
2472 | ||
2473 | /* Backward compat with non-final DT */ | |
2474 | if (dev->phy_mode == PHY_MODE_NA && pm != NULL && plen == 4) { | |
2475 | u32 nmode = *(const u32 *)pm; | |
2476 | if (nmode > PHY_MODE_NA && nmode <= PHY_MODE_SGMII) | |
2477 | dev->phy_mode = nmode; | |
2478 | } | |
2479 | ||
2480 | /* Check EMAC version */ | |
2481 | if (of_device_is_compatible(np, "ibm,emac4")) | |
2482 | dev->features |= EMAC_FTR_EMAC4; | |
bff713b5 BH |
2483 | |
2484 | /* Fixup some feature bits based on the device tree */ | |
2485 | if (of_get_property(np, "has-inverted-stacr-oc", NULL)) | |
1d3bb996 | 2486 | dev->features |= EMAC_FTR_STACR_OC_INVERT; |
bff713b5 BH |
2487 | if (of_get_property(np, "has-new-stacr-staopc", NULL)) |
2488 | dev->features |= EMAC_FTR_HAS_NEW_STACR; | |
1d3bb996 | 2489 | |
bff713b5 BH |
2490 | /* CAB lacks the appropriate properties */ |
2491 | if (of_device_is_compatible(np, "ibm,emac-axon")) | |
2492 | dev->features |= EMAC_FTR_HAS_NEW_STACR | | |
2493 | EMAC_FTR_STACR_OC_INVERT; | |
2494 | ||
2495 | /* Enable TAH/ZMII/RGMII features as found */ | |
1d3bb996 DG |
2496 | if (dev->tah_ph != 0) { |
2497 | #ifdef CONFIG_IBM_NEW_EMAC_TAH | |
2498 | dev->features |= EMAC_FTR_HAS_TAH; | |
2499 | #else | |
2500 | printk(KERN_ERR "%s: TAH support not enabled !\n", | |
2501 | np->full_name); | |
2502 | return -ENXIO; | |
2503 | #endif | |
2504 | } | |
2505 | ||
2506 | if (dev->zmii_ph != 0) { | |
2507 | #ifdef CONFIG_IBM_NEW_EMAC_ZMII | |
2508 | dev->features |= EMAC_FTR_HAS_ZMII; | |
2509 | #else | |
2510 | printk(KERN_ERR "%s: ZMII support not enabled !\n", | |
2511 | np->full_name); | |
2512 | return -ENXIO; | |
2513 | #endif | |
2514 | } | |
2515 | ||
2516 | if (dev->rgmii_ph != 0) { | |
2517 | #ifdef CONFIG_IBM_NEW_EMAC_RGMII | |
2518 | dev->features |= EMAC_FTR_HAS_RGMII; | |
2519 | #else | |
2520 | printk(KERN_ERR "%s: RGMII support not enabled !\n", | |
2521 | np->full_name); | |
2522 | return -ENXIO; | |
2523 | #endif | |
2524 | } | |
2525 | ||
2526 | /* Read MAC-address */ | |
2527 | p = of_get_property(np, "local-mac-address", NULL); | |
2528 | if (p == NULL) { | |
2529 | printk(KERN_ERR "%s: Can't find local-mac-address property\n", | |
2530 | np->full_name); | |
2531 | return -ENXIO; | |
2532 | } | |
2533 | memcpy(dev->ndev->dev_addr, p, 6); | |
2534 | ||
2535 | DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE); | |
2536 | DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige); | |
2537 | DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige); | |
2538 | DBG(dev, "max_mtu : %d\n", dev->max_mtu); | |
2539 | DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq); | |
2540 | ||
2541 | return 0; | |
2542 | } | |
2543 | ||
2544 | static int __devinit emac_probe(struct of_device *ofdev, | |
2545 | const struct of_device_id *match) | |
2546 | { | |
2547 | struct net_device *ndev; | |
2548 | struct emac_instance *dev; | |
2549 | struct device_node *np = ofdev->node; | |
2550 | struct device_node **blist = NULL; | |
2551 | int err, i; | |
2552 | ||
3d722562 HB |
2553 | /* Skip unused/unwired EMACS */ |
2554 | if (of_get_property(np, "unused", NULL)) | |
2555 | return -ENODEV; | |
2556 | ||
1d3bb996 DG |
2557 | /* Find ourselves in the bootlist if we are there */ |
2558 | for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) | |
2559 | if (emac_boot_list[i] == np) | |
2560 | blist = &emac_boot_list[i]; | |
2561 | ||
2562 | /* Allocate our net_device structure */ | |
2563 | err = -ENOMEM; | |
2564 | ndev = alloc_etherdev(sizeof(struct emac_instance)); | |
2565 | if (!ndev) { | |
2566 | printk(KERN_ERR "%s: could not allocate ethernet device!\n", | |
2567 | np->full_name); | |
2568 | goto err_gone; | |
2569 | } | |
2570 | dev = netdev_priv(ndev); | |
2571 | dev->ndev = ndev; | |
2572 | dev->ofdev = ofdev; | |
2573 | dev->blist = blist; | |
1d3bb996 DG |
2574 | SET_NETDEV_DEV(ndev, &ofdev->dev); |
2575 | ||
2576 | /* Initialize some embedded data structures */ | |
2577 | mutex_init(&dev->mdio_lock); | |
2578 | mutex_init(&dev->link_lock); | |
2579 | spin_lock_init(&dev->lock); | |
2580 | INIT_WORK(&dev->reset_work, emac_reset_work); | |
2581 | ||
2582 | /* Init various config data based on device-tree */ | |
2583 | err = emac_init_config(dev); | |
2584 | if (err != 0) | |
2585 | goto err_free; | |
2586 | ||
2587 | /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */ | |
2588 | dev->emac_irq = irq_of_parse_and_map(np, 0); | |
2589 | dev->wol_irq = irq_of_parse_and_map(np, 1); | |
2590 | if (dev->emac_irq == NO_IRQ) { | |
2591 | printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name); | |
2592 | goto err_free; | |
2593 | } | |
2594 | ndev->irq = dev->emac_irq; | |
2595 | ||
2596 | /* Map EMAC regs */ | |
2597 | if (of_address_to_resource(np, 0, &dev->rsrc_regs)) { | |
2598 | printk(KERN_ERR "%s: Can't get registers address\n", | |
2599 | np->full_name); | |
2600 | goto err_irq_unmap; | |
2601 | } | |
2602 | // TODO : request_mem_region | |
2603 | dev->emacp = ioremap(dev->rsrc_regs.start, sizeof(struct emac_regs)); | |
2604 | if (dev->emacp == NULL) { | |
2605 | printk(KERN_ERR "%s: Can't map device registers!\n", | |
2606 | np->full_name); | |
2607 | err = -ENOMEM; | |
2608 | goto err_irq_unmap; | |
2609 | } | |
2610 | ||
2611 | /* Wait for dependent devices */ | |
2612 | err = emac_wait_deps(dev); | |
2613 | if (err) { | |
2614 | printk(KERN_ERR | |
2615 | "%s: Timeout waiting for dependent devices\n", | |
2616 | np->full_name); | |
2617 | /* display more info about what's missing ? */ | |
2618 | goto err_reg_unmap; | |
2619 | } | |
2620 | dev->mal = dev_get_drvdata(&dev->mal_dev->dev); | |
2621 | if (dev->mdio_dev != NULL) | |
2622 | dev->mdio_instance = dev_get_drvdata(&dev->mdio_dev->dev); | |
2623 | ||
2624 | /* Register with MAL */ | |
2625 | dev->commac.ops = &emac_commac_ops; | |
2626 | dev->commac.dev = dev; | |
2627 | dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan); | |
2628 | dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan); | |
2629 | err = mal_register_commac(dev->mal, &dev->commac); | |
2630 | if (err) { | |
2631 | printk(KERN_ERR "%s: failed to register with mal %s!\n", | |
2632 | np->full_name, dev->mal_dev->node->full_name); | |
2633 | goto err_rel_deps; | |
2634 | } | |
2635 | dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); | |
2636 | dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); | |
2637 | ||
2638 | /* Get pointers to BD rings */ | |
2639 | dev->tx_desc = | |
2640 | dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan); | |
2641 | dev->rx_desc = | |
2642 | dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan); | |
2643 | ||
2644 | DBG(dev, "tx_desc %p" NL, dev->tx_desc); | |
2645 | DBG(dev, "rx_desc %p" NL, dev->rx_desc); | |
2646 | ||
2647 | /* Clean rings */ | |
2648 | memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); | |
2649 | memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); | |
2650 | ||
2651 | /* Attach to ZMII, if needed */ | |
2652 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) && | |
2653 | (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0) | |
2654 | goto err_unreg_commac; | |
2655 | ||
2656 | /* Attach to RGMII, if needed */ | |
2657 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) && | |
2658 | (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0) | |
2659 | goto err_detach_zmii; | |
2660 | ||
2661 | /* Attach to TAH, if needed */ | |
2662 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && | |
2663 | (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0) | |
2664 | goto err_detach_rgmii; | |
2665 | ||
2666 | /* Set some link defaults before we can find out real parameters */ | |
2667 | dev->phy.speed = SPEED_100; | |
2668 | dev->phy.duplex = DUPLEX_FULL; | |
2669 | dev->phy.autoneg = AUTONEG_DISABLE; | |
2670 | dev->phy.pause = dev->phy.asym_pause = 0; | |
2671 | dev->stop_timeout = STOP_TIMEOUT_100; | |
2672 | INIT_DELAYED_WORK(&dev->link_work, emac_link_timer); | |
2673 | ||
2674 | /* Find PHY if any */ | |
2675 | err = emac_init_phy(dev); | |
2676 | if (err != 0) | |
2677 | goto err_detach_tah; | |
2678 | ||
2679 | /* Fill in the driver function table */ | |
2680 | ndev->open = &emac_open; | |
2681 | #ifdef CONFIG_IBM_NEW_EMAC_TAH | |
2682 | if (dev->tah_dev) { | |
2683 | ndev->hard_start_xmit = &emac_start_xmit_sg; | |
2684 | ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; | |
2685 | } else | |
2686 | #endif | |
2687 | ndev->hard_start_xmit = &emac_start_xmit; | |
2688 | ndev->tx_timeout = &emac_tx_timeout; | |
2689 | ndev->watchdog_timeo = 5 * HZ; | |
2690 | ndev->stop = &emac_close; | |
2691 | ndev->get_stats = &emac_stats; | |
2692 | ndev->set_multicast_list = &emac_set_multicast_list; | |
2693 | ndev->do_ioctl = &emac_ioctl; | |
2694 | if (emac_phy_supports_gige(dev->phy_mode)) { | |
2695 | ndev->change_mtu = &emac_change_mtu; | |
2696 | dev->commac.ops = &emac_commac_sg_ops; | |
2697 | } | |
2698 | SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops); | |
2699 | ||
2700 | netif_carrier_off(ndev); | |
2701 | netif_stop_queue(ndev); | |
2702 | ||
2703 | err = register_netdev(ndev); | |
2704 | if (err) { | |
2705 | printk(KERN_ERR "%s: failed to register net device (%d)!\n", | |
2706 | np->full_name, err); | |
2707 | goto err_detach_tah; | |
2708 | } | |
2709 | ||
2710 | /* Set our drvdata last as we don't want them visible until we are | |
2711 | * fully initialized | |
2712 | */ | |
2713 | wmb(); | |
2714 | dev_set_drvdata(&ofdev->dev, dev); | |
2715 | ||
2716 | /* There's a new kid in town ! Let's tell everybody */ | |
2717 | wake_up_all(&emac_probe_wait); | |
2718 | ||
2719 | ||
2720 | printk(KERN_INFO | |
2721 | "%s: EMAC-%d %s, MAC %02x:%02x:%02x:%02x:%02x:%02x\n", | |
2722 | ndev->name, dev->cell_index, np->full_name, | |
2723 | ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2], | |
2724 | ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]); | |
2725 | ||
2726 | if (dev->phy.address >= 0) | |
2727 | printk("%s: found %s PHY (0x%02x)\n", ndev->name, | |
2728 | dev->phy.def->name, dev->phy.address); | |
2729 | ||
2730 | emac_dbg_register(dev); | |
2731 | ||
2732 | /* Life is good */ | |
2733 | return 0; | |
2734 | ||
2735 | /* I have a bad feeling about this ... */ | |
2736 | ||
2737 | err_detach_tah: | |
2738 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
2739 | tah_detach(dev->tah_dev, dev->tah_port); | |
2740 | err_detach_rgmii: | |
2741 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
2742 | rgmii_detach(dev->rgmii_dev, dev->rgmii_port); | |
2743 | err_detach_zmii: | |
2744 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
2745 | zmii_detach(dev->zmii_dev, dev->zmii_port); | |
2746 | err_unreg_commac: | |
2747 | mal_unregister_commac(dev->mal, &dev->commac); | |
2748 | err_rel_deps: | |
2749 | emac_put_deps(dev); | |
2750 | err_reg_unmap: | |
2751 | iounmap(dev->emacp); | |
2752 | err_irq_unmap: | |
2753 | if (dev->wol_irq != NO_IRQ) | |
2754 | irq_dispose_mapping(dev->wol_irq); | |
2755 | if (dev->emac_irq != NO_IRQ) | |
2756 | irq_dispose_mapping(dev->emac_irq); | |
2757 | err_free: | |
2758 | kfree(ndev); | |
2759 | err_gone: | |
2760 | /* if we were on the bootlist, remove us as we won't show up and | |
2761 | * wake up all waiters to notify them in case they were waiting | |
2762 | * on us | |
2763 | */ | |
2764 | if (blist) { | |
2765 | *blist = NULL; | |
2766 | wake_up_all(&emac_probe_wait); | |
2767 | } | |
2768 | return err; | |
2769 | } | |
2770 | ||
2771 | static int __devexit emac_remove(struct of_device *ofdev) | |
2772 | { | |
2773 | struct emac_instance *dev = dev_get_drvdata(&ofdev->dev); | |
2774 | ||
2775 | DBG(dev, "remove" NL); | |
2776 | ||
2777 | dev_set_drvdata(&ofdev->dev, NULL); | |
2778 | ||
2779 | unregister_netdev(dev->ndev); | |
2780 | ||
61dbcece BH |
2781 | flush_scheduled_work(); |
2782 | ||
1d3bb996 DG |
2783 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) |
2784 | tah_detach(dev->tah_dev, dev->tah_port); | |
2785 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
2786 | rgmii_detach(dev->rgmii_dev, dev->rgmii_port); | |
2787 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
2788 | zmii_detach(dev->zmii_dev, dev->zmii_port); | |
2789 | ||
2790 | mal_unregister_commac(dev->mal, &dev->commac); | |
2791 | emac_put_deps(dev); | |
2792 | ||
2793 | emac_dbg_unregister(dev); | |
2794 | iounmap(dev->emacp); | |
2795 | ||
2796 | if (dev->wol_irq != NO_IRQ) | |
2797 | irq_dispose_mapping(dev->wol_irq); | |
2798 | if (dev->emac_irq != NO_IRQ) | |
2799 | irq_dispose_mapping(dev->emac_irq); | |
2800 | ||
2801 | kfree(dev->ndev); | |
2802 | ||
2803 | return 0; | |
2804 | } | |
2805 | ||
2806 | /* XXX Features in here should be replaced by properties... */ | |
2807 | static struct of_device_id emac_match[] = | |
2808 | { | |
2809 | { | |
2810 | .type = "network", | |
2811 | .compatible = "ibm,emac", | |
2812 | }, | |
2813 | { | |
2814 | .type = "network", | |
2815 | .compatible = "ibm,emac4", | |
2816 | }, | |
2817 | {}, | |
2818 | }; | |
2819 | ||
2820 | static struct of_platform_driver emac_driver = { | |
2821 | .name = "emac", | |
2822 | .match_table = emac_match, | |
2823 | ||
2824 | .probe = emac_probe, | |
2825 | .remove = emac_remove, | |
2826 | }; | |
2827 | ||
2828 | static void __init emac_make_bootlist(void) | |
2829 | { | |
2830 | struct device_node *np = NULL; | |
2831 | int j, max, i = 0, k; | |
2832 | int cell_indices[EMAC_BOOT_LIST_SIZE]; | |
2833 | ||
2834 | /* Collect EMACs */ | |
2835 | while((np = of_find_all_nodes(np)) != NULL) { | |
2836 | const u32 *idx; | |
2837 | ||
2838 | if (of_match_node(emac_match, np) == NULL) | |
2839 | continue; | |
2840 | if (of_get_property(np, "unused", NULL)) | |
2841 | continue; | |
2842 | idx = of_get_property(np, "cell-index", NULL); | |
2843 | if (idx == NULL) | |
2844 | continue; | |
2845 | cell_indices[i] = *idx; | |
2846 | emac_boot_list[i++] = of_node_get(np); | |
2847 | if (i >= EMAC_BOOT_LIST_SIZE) { | |
2848 | of_node_put(np); | |
2849 | break; | |
2850 | } | |
2851 | } | |
2852 | max = i; | |
2853 | ||
2854 | /* Bubble sort them (doh, what a creative algorithm :-) */ | |
2855 | for (i = 0; max > 1 && (i < (max - 1)); i++) | |
2856 | for (j = i; j < max; j++) { | |
2857 | if (cell_indices[i] > cell_indices[j]) { | |
2858 | np = emac_boot_list[i]; | |
2859 | emac_boot_list[i] = emac_boot_list[j]; | |
2860 | emac_boot_list[j] = np; | |
2861 | k = cell_indices[i]; | |
2862 | cell_indices[i] = cell_indices[j]; | |
2863 | cell_indices[j] = k; | |
2864 | } | |
2865 | } | |
2866 | } | |
2867 | ||
2868 | static int __init emac_init(void) | |
2869 | { | |
2870 | int rc; | |
2871 | ||
2872 | printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); | |
2873 | ||
2874 | /* Init debug stuff */ | |
2875 | emac_init_debug(); | |
2876 | ||
2877 | /* Build EMAC boot list */ | |
2878 | emac_make_bootlist(); | |
2879 | ||
2880 | /* Init submodules */ | |
2881 | rc = mal_init(); | |
2882 | if (rc) | |
2883 | goto err; | |
2884 | rc = zmii_init(); | |
2885 | if (rc) | |
2886 | goto err_mal; | |
2887 | rc = rgmii_init(); | |
2888 | if (rc) | |
2889 | goto err_zmii; | |
2890 | rc = tah_init(); | |
2891 | if (rc) | |
2892 | goto err_rgmii; | |
2893 | rc = of_register_platform_driver(&emac_driver); | |
2894 | if (rc) | |
2895 | goto err_tah; | |
2896 | ||
2897 | return 0; | |
2898 | ||
2899 | err_tah: | |
2900 | tah_exit(); | |
2901 | err_rgmii: | |
2902 | rgmii_exit(); | |
2903 | err_zmii: | |
2904 | zmii_exit(); | |
2905 | err_mal: | |
2906 | mal_exit(); | |
2907 | err: | |
2908 | return rc; | |
2909 | } | |
2910 | ||
2911 | static void __exit emac_exit(void) | |
2912 | { | |
2913 | int i; | |
2914 | ||
2915 | of_unregister_platform_driver(&emac_driver); | |
2916 | ||
2917 | tah_exit(); | |
2918 | rgmii_exit(); | |
2919 | zmii_exit(); | |
2920 | mal_exit(); | |
2921 | emac_fini_debug(); | |
2922 | ||
2923 | /* Destroy EMAC boot list */ | |
2924 | for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) | |
2925 | if (emac_boot_list[i]) | |
2926 | of_node_put(emac_boot_list[i]); | |
2927 | } | |
2928 | ||
2929 | module_init(emac_init); | |
2930 | module_exit(emac_exit); |