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Commit | Line | Data |
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1d3bb996 | 1 | /* |
3396c782 | 2 | * drivers/net/ethernet/ibm/emac/core.c |
1d3bb996 DG |
3 | * |
4 | * Driver for PowerPC 4xx on-chip ethernet controller. | |
5 | * | |
17cf803a BH |
6 | * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. |
7 | * <benh@kernel.crashing.org> | |
8 | * | |
9 | * Based on the arch/ppc version of the driver: | |
10 | * | |
1d3bb996 DG |
11 | * Copyright (c) 2004, 2005 Zultys Technologies. |
12 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
13 | * | |
14 | * Based on original work by | |
15 | * Matt Porter <mporter@kernel.crashing.org> | |
16 | * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
17 | * Armin Kuster <akuster@mvista.com> | |
18 | * Johnnie Peters <jpeters@mvista.com> | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or modify it | |
21 | * under the terms of the GNU General Public License as published by the | |
22 | * Free Software Foundation; either version 2 of the License, or (at your | |
23 | * option) any later version. | |
24 | * | |
25 | */ | |
26 | ||
e72701ac | 27 | #include <linux/module.h> |
1d3bb996 DG |
28 | #include <linux/sched.h> |
29 | #include <linux/string.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/etherdevice.h> | |
35 | #include <linux/skbuff.h> | |
36 | #include <linux/crc32.h> | |
37 | #include <linux/ethtool.h> | |
38 | #include <linux/mii.h> | |
39 | #include <linux/bitops.h> | |
40 | #include <linux/workqueue.h> | |
283029d1 | 41 | #include <linux/of.h> |
5af50730 RH |
42 | #include <linux/of_address.h> |
43 | #include <linux/of_irq.h> | |
4157ef1b | 44 | #include <linux/of_net.h> |
a577ca6b | 45 | #include <linux/of_mdio.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
1d3bb996 DG |
47 | |
48 | #include <asm/processor.h> | |
49 | #include <asm/io.h> | |
50 | #include <asm/dma.h> | |
7c0f6ba6 | 51 | #include <linux/uaccess.h> |
0925ab5d VB |
52 | #include <asm/dcr.h> |
53 | #include <asm/dcr-regs.h> | |
1d3bb996 DG |
54 | |
55 | #include "core.h" | |
56 | ||
57 | /* | |
58 | * Lack of dma_unmap_???? calls is intentional. | |
59 | * | |
60 | * API-correct usage requires additional support state information to be | |
61 | * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to | |
62 | * EMAC design (e.g. TX buffer passed from network stack can be split into | |
63 | * several BDs, dma_map_single/dma_map_page can be used to map particular BD), | |
64 | * maintaining such information will add additional overhead. | |
65 | * Current DMA API implementation for 4xx processors only ensures cache coherency | |
66 | * and dma_unmap_???? routines are empty and are likely to stay this way. | |
67 | * I decided to omit dma_unmap_??? calls because I don't want to add additional | |
68 | * complexity just for the sake of following some abstract API, when it doesn't | |
69 | * add any real benefit to the driver. I understand that this decision maybe | |
70 | * controversial, but I really tried to make code API-correct and efficient | |
71 | * at the same time and didn't come up with code I liked :(. --ebs | |
72 | */ | |
73 | ||
74 | #define DRV_NAME "emac" | |
75 | #define DRV_VERSION "3.54" | |
76 | #define DRV_DESC "PPC 4xx OCP EMAC driver" | |
77 | ||
78 | MODULE_DESCRIPTION(DRV_DESC); | |
79 | MODULE_AUTHOR | |
80 | ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); | |
81 | MODULE_LICENSE("GPL"); | |
82 | ||
1d3bb996 DG |
83 | /* minimum number of free TX descriptors required to wake up TX process */ |
84 | #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) | |
85 | ||
86 | /* If packet size is less than this number, we allocate small skb and copy packet | |
87 | * contents into it instead of just sending original big skb up | |
88 | */ | |
3b3bceef | 89 | #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD |
1d3bb996 DG |
90 | |
91 | /* Since multiple EMACs share MDIO lines in various ways, we need | |
92 | * to avoid re-using the same PHY ID in cases where the arch didn't | |
93 | * setup precise phy_map entries | |
94 | * | |
95 | * XXX This is something that needs to be reworked as we can have multiple | |
96 | * EMAC "sets" (multiple ASICs containing several EMACs) though we can | |
97 | * probably require in that case to have explicit PHY IDs in the device-tree | |
98 | */ | |
99 | static u32 busy_phy_map; | |
100 | static DEFINE_MUTEX(emac_phy_map_lock); | |
101 | ||
102 | /* This is the wait queue used to wait on any event related to probe, that | |
103 | * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc... | |
104 | */ | |
105 | static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait); | |
106 | ||
107 | /* Having stable interface names is a doomed idea. However, it would be nice | |
108 | * if we didn't have completely random interface names at boot too :-) It's | |
109 | * just a matter of making everybody's life easier. Since we are doing | |
110 | * threaded probing, it's a bit harder though. The base idea here is that | |
111 | * we make up a list of all emacs in the device-tree before we register the | |
112 | * driver. Every emac will then wait for the previous one in the list to | |
113 | * initialize before itself. We should also keep that list ordered by | |
114 | * cell_index. | |
115 | * That list is only 4 entries long, meaning that additional EMACs don't | |
116 | * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased. | |
117 | */ | |
118 | ||
119 | #define EMAC_BOOT_LIST_SIZE 4 | |
120 | static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE]; | |
121 | ||
122 | /* How long should I wait for dependent devices ? */ | |
123 | #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5) | |
124 | ||
125 | /* I don't want to litter system log with timeout errors | |
126 | * when we have brain-damaged PHY. | |
127 | */ | |
128 | static inline void emac_report_timeout_error(struct emac_instance *dev, | |
129 | const char *error) | |
130 | { | |
11121e30 | 131 | if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX | |
9e3cb294 | 132 | EMAC_FTR_460EX_PHY_CLK_FIX | |
11121e30 VB |
133 | EMAC_FTR_440EP_PHY_CLK_FIX)) |
134 | DBG(dev, "%s" NL, error); | |
135 | else if (net_ratelimit()) | |
61c7a080 GL |
136 | printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name, |
137 | error); | |
1d3bb996 DG |
138 | } |
139 | ||
11121e30 VB |
140 | /* EMAC PHY clock workaround: |
141 | * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, | |
142 | * which allows controlling each EMAC clock | |
143 | */ | |
144 | static inline void emac_rx_clk_tx(struct emac_instance *dev) | |
145 | { | |
146 | #ifdef CONFIG_PPC_DCR_NATIVE | |
147 | if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) | |
148 | dcri_clrset(SDR0, SDR0_MFR, | |
149 | 0, SDR0_MFR_ECS >> dev->cell_index); | |
150 | #endif | |
151 | } | |
152 | ||
153 | static inline void emac_rx_clk_default(struct emac_instance *dev) | |
154 | { | |
155 | #ifdef CONFIG_PPC_DCR_NATIVE | |
156 | if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) | |
157 | dcri_clrset(SDR0, SDR0_MFR, | |
158 | SDR0_MFR_ECS >> dev->cell_index, 0); | |
159 | #endif | |
160 | } | |
161 | ||
1d3bb996 DG |
162 | /* PHY polling intervals */ |
163 | #define PHY_POLL_LINK_ON HZ | |
164 | #define PHY_POLL_LINK_OFF (HZ / 5) | |
165 | ||
166 | /* Graceful stop timeouts in us. | |
167 | * We should allow up to 1 frame time (full-duplex, ignoring collisions) | |
168 | */ | |
169 | #define STOP_TIMEOUT_10 1230 | |
170 | #define STOP_TIMEOUT_100 124 | |
171 | #define STOP_TIMEOUT_1000 13 | |
172 | #define STOP_TIMEOUT_1000_JUMBO 73 | |
173 | ||
4373c932 PB |
174 | static unsigned char default_mcast_addr[] = { |
175 | 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 | |
176 | }; | |
177 | ||
1d3bb996 DG |
178 | /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ |
179 | static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { | |
180 | "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", | |
181 | "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", | |
182 | "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", | |
183 | "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", | |
184 | "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", | |
185 | "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", | |
186 | "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", | |
187 | "rx_bad_packet", "rx_runt_packet", "rx_short_event", | |
188 | "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", | |
189 | "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", | |
190 | "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", | |
191 | "tx_bd_excessive_collisions", "tx_bd_late_collision", | |
192 | "tx_bd_multple_collisions", "tx_bd_single_collision", | |
193 | "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", | |
194 | "tx_errors" | |
195 | }; | |
196 | ||
197 | static irqreturn_t emac_irq(int irq, void *dev_instance); | |
198 | static void emac_clean_tx_ring(struct emac_instance *dev); | |
199 | static void __emac_set_multicast_list(struct emac_instance *dev); | |
200 | ||
201 | static inline int emac_phy_supports_gige(int phy_mode) | |
202 | { | |
203 | return phy_mode == PHY_MODE_GMII || | |
204 | phy_mode == PHY_MODE_RGMII || | |
9e3cb294 | 205 | phy_mode == PHY_MODE_SGMII || |
1d3bb996 DG |
206 | phy_mode == PHY_MODE_TBI || |
207 | phy_mode == PHY_MODE_RTBI; | |
208 | } | |
209 | ||
210 | static inline int emac_phy_gpcs(int phy_mode) | |
211 | { | |
9e3cb294 VG |
212 | return phy_mode == PHY_MODE_SGMII || |
213 | phy_mode == PHY_MODE_TBI || | |
1d3bb996 DG |
214 | phy_mode == PHY_MODE_RTBI; |
215 | } | |
216 | ||
217 | static inline void emac_tx_enable(struct emac_instance *dev) | |
218 | { | |
219 | struct emac_regs __iomem *p = dev->emacp; | |
220 | u32 r; | |
221 | ||
222 | DBG(dev, "tx_enable" NL); | |
223 | ||
224 | r = in_be32(&p->mr0); | |
225 | if (!(r & EMAC_MR0_TXE)) | |
226 | out_be32(&p->mr0, r | EMAC_MR0_TXE); | |
227 | } | |
228 | ||
229 | static void emac_tx_disable(struct emac_instance *dev) | |
230 | { | |
231 | struct emac_regs __iomem *p = dev->emacp; | |
232 | u32 r; | |
233 | ||
234 | DBG(dev, "tx_disable" NL); | |
235 | ||
236 | r = in_be32(&p->mr0); | |
237 | if (r & EMAC_MR0_TXE) { | |
238 | int n = dev->stop_timeout; | |
239 | out_be32(&p->mr0, r & ~EMAC_MR0_TXE); | |
240 | while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { | |
241 | udelay(1); | |
242 | --n; | |
243 | } | |
244 | if (unlikely(!n)) | |
245 | emac_report_timeout_error(dev, "TX disable timeout"); | |
246 | } | |
247 | } | |
248 | ||
249 | static void emac_rx_enable(struct emac_instance *dev) | |
250 | { | |
251 | struct emac_regs __iomem *p = dev->emacp; | |
252 | u32 r; | |
253 | ||
254 | if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) | |
255 | goto out; | |
256 | ||
257 | DBG(dev, "rx_enable" NL); | |
258 | ||
259 | r = in_be32(&p->mr0); | |
260 | if (!(r & EMAC_MR0_RXE)) { | |
261 | if (unlikely(!(r & EMAC_MR0_RXI))) { | |
262 | /* Wait if previous async disable is still in progress */ | |
263 | int n = dev->stop_timeout; | |
264 | while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { | |
265 | udelay(1); | |
266 | --n; | |
267 | } | |
268 | if (unlikely(!n)) | |
269 | emac_report_timeout_error(dev, | |
270 | "RX disable timeout"); | |
271 | } | |
272 | out_be32(&p->mr0, r | EMAC_MR0_RXE); | |
273 | } | |
274 | out: | |
275 | ; | |
276 | } | |
277 | ||
278 | static void emac_rx_disable(struct emac_instance *dev) | |
279 | { | |
280 | struct emac_regs __iomem *p = dev->emacp; | |
281 | u32 r; | |
282 | ||
283 | DBG(dev, "rx_disable" NL); | |
284 | ||
285 | r = in_be32(&p->mr0); | |
286 | if (r & EMAC_MR0_RXE) { | |
287 | int n = dev->stop_timeout; | |
288 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); | |
289 | while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { | |
290 | udelay(1); | |
291 | --n; | |
292 | } | |
293 | if (unlikely(!n)) | |
294 | emac_report_timeout_error(dev, "RX disable timeout"); | |
295 | } | |
296 | } | |
297 | ||
298 | static inline void emac_netif_stop(struct emac_instance *dev) | |
299 | { | |
300 | netif_tx_lock_bh(dev->ndev); | |
e308a5d8 | 301 | netif_addr_lock(dev->ndev); |
1d3bb996 | 302 | dev->no_mcast = 1; |
e308a5d8 | 303 | netif_addr_unlock(dev->ndev); |
1d3bb996 | 304 | netif_tx_unlock_bh(dev->ndev); |
860e9538 | 305 | netif_trans_update(dev->ndev); /* prevent tx timeout */ |
1d3bb996 DG |
306 | mal_poll_disable(dev->mal, &dev->commac); |
307 | netif_tx_disable(dev->ndev); | |
308 | } | |
309 | ||
310 | static inline void emac_netif_start(struct emac_instance *dev) | |
311 | { | |
312 | netif_tx_lock_bh(dev->ndev); | |
e308a5d8 | 313 | netif_addr_lock(dev->ndev); |
1d3bb996 DG |
314 | dev->no_mcast = 0; |
315 | if (dev->mcast_pending && netif_running(dev->ndev)) | |
316 | __emac_set_multicast_list(dev); | |
e308a5d8 | 317 | netif_addr_unlock(dev->ndev); |
1d3bb996 DG |
318 | netif_tx_unlock_bh(dev->ndev); |
319 | ||
320 | netif_wake_queue(dev->ndev); | |
321 | ||
322 | /* NOTE: unconditional netif_wake_queue is only appropriate | |
323 | * so long as all callers are assured to have free tx slots | |
324 | * (taken from tg3... though the case where that is wrong is | |
325 | * not terribly harmful) | |
326 | */ | |
327 | mal_poll_enable(dev->mal, &dev->commac); | |
328 | } | |
329 | ||
330 | static inline void emac_rx_disable_async(struct emac_instance *dev) | |
331 | { | |
332 | struct emac_regs __iomem *p = dev->emacp; | |
333 | u32 r; | |
334 | ||
335 | DBG(dev, "rx_disable_async" NL); | |
336 | ||
337 | r = in_be32(&p->mr0); | |
338 | if (r & EMAC_MR0_RXE) | |
339 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); | |
340 | } | |
341 | ||
342 | static int emac_reset(struct emac_instance *dev) | |
343 | { | |
344 | struct emac_regs __iomem *p = dev->emacp; | |
345 | int n = 20; | |
346 | ||
347 | DBG(dev, "reset" NL); | |
348 | ||
349 | if (!dev->reset_failed) { | |
350 | /* 40x erratum suggests stopping RX channel before reset, | |
351 | * we stop TX as well | |
352 | */ | |
353 | emac_rx_disable(dev); | |
354 | emac_tx_disable(dev); | |
355 | } | |
356 | ||
9e3cb294 | 357 | #ifdef CONFIG_PPC_DCR_NATIVE |
23fbb5a8 PG |
358 | /* |
359 | * PPC460EX/GT Embedded Processor Advanced User's Manual | |
360 | * section 28.10.1 Mode Register 0 (EMACx_MR0) states: | |
361 | * Note: The PHY must provide a TX Clk in order to perform a soft reset | |
362 | * of the EMAC. If none is present, select the internal clock | |
363 | * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1). | |
364 | * After a soft reset, select the external clock. | |
365 | */ | |
366 | if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) { | |
367 | if (dev->phy_address == 0xffffffff && | |
368 | dev->phy_map == 0xffffffff) { | |
369 | /* No PHY: select internal loop clock before reset */ | |
370 | dcri_clrset(SDR0, SDR0_ETH_CFG, | |
371 | 0, SDR0_ETH_CFG_ECS << dev->cell_index); | |
372 | } else { | |
373 | /* PHY present: select external clock before reset */ | |
374 | dcri_clrset(SDR0, SDR0_ETH_CFG, | |
375 | SDR0_ETH_CFG_ECS << dev->cell_index, 0); | |
376 | } | |
377 | } | |
9e3cb294 VG |
378 | #endif |
379 | ||
1d3bb996 DG |
380 | out_be32(&p->mr0, EMAC_MR0_SRST); |
381 | while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) | |
382 | --n; | |
383 | ||
9e3cb294 | 384 | #ifdef CONFIG_PPC_DCR_NATIVE |
23fbb5a8 PG |
385 | if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) { |
386 | if (dev->phy_address == 0xffffffff && | |
387 | dev->phy_map == 0xffffffff) { | |
388 | /* No PHY: restore external clock source after reset */ | |
389 | dcri_clrset(SDR0, SDR0_ETH_CFG, | |
390 | SDR0_ETH_CFG_ECS << dev->cell_index, 0); | |
391 | } | |
392 | } | |
9e3cb294 VG |
393 | #endif |
394 | ||
1d3bb996 DG |
395 | if (n) { |
396 | dev->reset_failed = 0; | |
397 | return 0; | |
398 | } else { | |
399 | emac_report_timeout_error(dev, "reset timeout"); | |
400 | dev->reset_failed = 1; | |
401 | return -ETIMEDOUT; | |
402 | } | |
403 | } | |
404 | ||
405 | static void emac_hash_mc(struct emac_instance *dev) | |
406 | { | |
05781ccd GE |
407 | const int regs = EMAC_XAHT_REGS(dev); |
408 | u32 *gaht_base = emac_gaht_base(dev); | |
409 | u32 gaht_temp[regs]; | |
22bedad3 | 410 | struct netdev_hw_addr *ha; |
05781ccd | 411 | int i; |
1d3bb996 | 412 | |
4cd24eaf | 413 | DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev)); |
1d3bb996 | 414 | |
05781ccd GE |
415 | memset(gaht_temp, 0, sizeof (gaht_temp)); |
416 | ||
22bedad3 | 417 | netdev_for_each_mc_addr(ha, dev->ndev) { |
05781ccd | 418 | int slot, reg, mask; |
22bedad3 | 419 | DBG2(dev, "mc %pM" NL, ha->addr); |
1d3bb996 | 420 | |
22bedad3 JP |
421 | slot = EMAC_XAHT_CRC_TO_SLOT(dev, |
422 | ether_crc(ETH_ALEN, ha->addr)); | |
05781ccd GE |
423 | reg = EMAC_XAHT_SLOT_TO_REG(dev, slot); |
424 | mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot); | |
425 | ||
426 | gaht_temp[reg] |= mask; | |
1d3bb996 | 427 | } |
05781ccd GE |
428 | |
429 | for (i = 0; i < regs; i++) | |
430 | out_be32(gaht_base + i, gaht_temp[i]); | |
1d3bb996 DG |
431 | } |
432 | ||
433 | static inline u32 emac_iff2rmr(struct net_device *ndev) | |
434 | { | |
435 | struct emac_instance *dev = netdev_priv(ndev); | |
436 | u32 r; | |
437 | ||
438 | r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE; | |
439 | ||
440 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
441 | r |= EMAC4_RMR_BASE; | |
442 | else | |
443 | r |= EMAC_RMR_BASE; | |
444 | ||
445 | if (ndev->flags & IFF_PROMISC) | |
446 | r |= EMAC_RMR_PME; | |
05781ccd | 447 | else if (ndev->flags & IFF_ALLMULTI || |
4cd24eaf | 448 | (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev))) |
1d3bb996 | 449 | r |= EMAC_RMR_PMME; |
4cd24eaf | 450 | else if (!netdev_mc_empty(ndev)) |
1d3bb996 DG |
451 | r |= EMAC_RMR_MAE; |
452 | ||
ae5d3372 DD |
453 | if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) { |
454 | r &= ~EMAC4_RMR_MJS_MASK; | |
455 | r |= EMAC4_RMR_MJS(ndev->mtu); | |
456 | } | |
457 | ||
1d3bb996 DG |
458 | return r; |
459 | } | |
460 | ||
461 | static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) | |
462 | { | |
463 | u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT; | |
464 | ||
465 | DBG2(dev, "__emac_calc_base_mr1" NL); | |
466 | ||
467 | switch(tx_size) { | |
468 | case 2048: | |
469 | ret |= EMAC_MR1_TFS_2K; | |
470 | break; | |
471 | default: | |
3201fce0 | 472 | printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", |
1d3bb996 DG |
473 | dev->ndev->name, tx_size); |
474 | } | |
475 | ||
476 | switch(rx_size) { | |
477 | case 16384: | |
478 | ret |= EMAC_MR1_RFS_16K; | |
479 | break; | |
480 | case 4096: | |
481 | ret |= EMAC_MR1_RFS_4K; | |
482 | break; | |
483 | default: | |
484 | printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", | |
485 | dev->ndev->name, rx_size); | |
486 | } | |
487 | ||
488 | return ret; | |
489 | } | |
490 | ||
491 | static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) | |
492 | { | |
493 | u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR | | |
4696c3c4 | 494 | EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000); |
1d3bb996 DG |
495 | |
496 | DBG2(dev, "__emac4_calc_base_mr1" NL); | |
497 | ||
498 | switch(tx_size) { | |
3201fce0 DM |
499 | case 16384: |
500 | ret |= EMAC4_MR1_TFS_16K; | |
501 | break; | |
1d3bb996 DG |
502 | case 4096: |
503 | ret |= EMAC4_MR1_TFS_4K; | |
504 | break; | |
505 | case 2048: | |
506 | ret |= EMAC4_MR1_TFS_2K; | |
507 | break; | |
508 | default: | |
3201fce0 | 509 | printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", |
1d3bb996 DG |
510 | dev->ndev->name, tx_size); |
511 | } | |
512 | ||
513 | switch(rx_size) { | |
514 | case 16384: | |
515 | ret |= EMAC4_MR1_RFS_16K; | |
516 | break; | |
517 | case 4096: | |
518 | ret |= EMAC4_MR1_RFS_4K; | |
519 | break; | |
520 | case 2048: | |
521 | ret |= EMAC4_MR1_RFS_2K; | |
522 | break; | |
523 | default: | |
524 | printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", | |
525 | dev->ndev->name, rx_size); | |
526 | } | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) | |
532 | { | |
533 | return emac_has_feature(dev, EMAC_FTR_EMAC4) ? | |
534 | __emac4_calc_base_mr1(dev, tx_size, rx_size) : | |
535 | __emac_calc_base_mr1(dev, tx_size, rx_size); | |
536 | } | |
537 | ||
538 | static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size) | |
539 | { | |
540 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
541 | return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4; | |
542 | else | |
543 | return ((size >> 6) - 1) << EMAC_TRTR_SHIFT; | |
544 | } | |
545 | ||
546 | static inline u32 emac_calc_rwmr(struct emac_instance *dev, | |
547 | unsigned int low, unsigned int high) | |
548 | { | |
549 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
550 | return (low << 22) | ( (high & 0x3ff) << 6); | |
551 | else | |
552 | return (low << 23) | ( (high & 0x1ff) << 7); | |
553 | } | |
554 | ||
555 | static int emac_configure(struct emac_instance *dev) | |
556 | { | |
557 | struct emac_regs __iomem *p = dev->emacp; | |
558 | struct net_device *ndev = dev->ndev; | |
911b237d | 559 | int tx_size, rx_size, link = netif_carrier_ok(dev->ndev); |
1d3bb996 DG |
560 | u32 r, mr1 = 0; |
561 | ||
562 | DBG(dev, "configure" NL); | |
563 | ||
911b237d BH |
564 | if (!link) { |
565 | out_be32(&p->mr1, in_be32(&p->mr1) | |
566 | | EMAC_MR1_FDE | EMAC_MR1_ILE); | |
567 | udelay(100); | |
568 | } else if (emac_reset(dev) < 0) | |
1d3bb996 DG |
569 | return -ETIMEDOUT; |
570 | ||
571 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
572 | tah_reset(dev->tah_dev); | |
573 | ||
911b237d BH |
574 | DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n", |
575 | link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause); | |
1d3bb996 DG |
576 | |
577 | /* Default fifo sizes */ | |
578 | tx_size = dev->tx_fifo_size; | |
579 | rx_size = dev->rx_fifo_size; | |
580 | ||
911b237d BH |
581 | /* No link, force loopback */ |
582 | if (!link) | |
583 | mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE; | |
584 | ||
1d3bb996 | 585 | /* Check for full duplex */ |
911b237d | 586 | else if (dev->phy.duplex == DUPLEX_FULL) |
1d3bb996 DG |
587 | mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; |
588 | ||
589 | /* Adjust fifo sizes, mr1 and timeouts based on link speed */ | |
590 | dev->stop_timeout = STOP_TIMEOUT_10; | |
591 | switch (dev->phy.speed) { | |
592 | case SPEED_1000: | |
593 | if (emac_phy_gpcs(dev->phy.mode)) { | |
9e3cb294 VG |
594 | mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA( |
595 | (dev->phy.gpcs_address != 0xffffffff) ? | |
596 | dev->phy.gpcs_address : dev->phy.address); | |
1d3bb996 DG |
597 | |
598 | /* Put some arbitrary OUI, Manuf & Rev IDs so we can | |
599 | * identify this GPCS PHY later. | |
600 | */ | |
05781ccd | 601 | out_be32(&p->u1.emac4.ipcr, 0xdeadbeef); |
1d3bb996 DG |
602 | } else |
603 | mr1 |= EMAC_MR1_MF_1000; | |
604 | ||
605 | /* Extended fifo sizes */ | |
606 | tx_size = dev->tx_fifo_size_gige; | |
607 | rx_size = dev->rx_fifo_size_gige; | |
608 | ||
609 | if (dev->ndev->mtu > ETH_DATA_LEN) { | |
f34ebab6 SR |
610 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) |
611 | mr1 |= EMAC4_MR1_JPSM; | |
612 | else | |
613 | mr1 |= EMAC_MR1_JPSM; | |
1d3bb996 DG |
614 | dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; |
615 | } else | |
616 | dev->stop_timeout = STOP_TIMEOUT_1000; | |
617 | break; | |
618 | case SPEED_100: | |
619 | mr1 |= EMAC_MR1_MF_100; | |
620 | dev->stop_timeout = STOP_TIMEOUT_100; | |
621 | break; | |
622 | default: /* make gcc happy */ | |
623 | break; | |
624 | } | |
625 | ||
626 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
627 | rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port, | |
628 | dev->phy.speed); | |
629 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
630 | zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed); | |
631 | ||
632 | /* on 40x erratum forces us to NOT use integrated flow control, | |
633 | * let's hope it works on 44x ;) | |
634 | */ | |
635 | if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) && | |
636 | dev->phy.duplex == DUPLEX_FULL) { | |
637 | if (dev->phy.pause) | |
638 | mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP; | |
639 | else if (dev->phy.asym_pause) | |
640 | mr1 |= EMAC_MR1_APP; | |
641 | } | |
642 | ||
643 | /* Add base settings & fifo sizes & program MR1 */ | |
644 | mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size); | |
645 | out_be32(&p->mr1, mr1); | |
646 | ||
647 | /* Set individual MAC address */ | |
648 | out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); | |
649 | out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | | |
650 | (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | | |
651 | ndev->dev_addr[5]); | |
652 | ||
653 | /* VLAN Tag Protocol ID */ | |
654 | out_be32(&p->vtpid, 0x8100); | |
655 | ||
656 | /* Receive mode register */ | |
657 | r = emac_iff2rmr(ndev); | |
658 | if (r & EMAC_RMR_MAE) | |
659 | emac_hash_mc(dev); | |
660 | out_be32(&p->rmr, r); | |
661 | ||
662 | /* FIFOs thresholds */ | |
663 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
664 | r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, | |
665 | tx_size / 2 / dev->fifo_entry_size); | |
666 | else | |
667 | r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, | |
668 | tx_size / 2 / dev->fifo_entry_size); | |
669 | out_be32(&p->tmr1, r); | |
670 | out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2)); | |
671 | ||
672 | /* PAUSE frame is sent when RX FIFO reaches its high-water mark, | |
673 | there should be still enough space in FIFO to allow the our link | |
674 | partner time to process this frame and also time to send PAUSE | |
675 | frame itself. | |
676 | ||
677 | Here is the worst case scenario for the RX FIFO "headroom" | |
678 | (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): | |
679 | ||
680 | 1) One maximum-length frame on TX 1522 bytes | |
681 | 2) One PAUSE frame time 64 bytes | |
682 | 3) PAUSE frame decode time allowance 64 bytes | |
683 | 4) One maximum-length frame on RX 1522 bytes | |
684 | 5) Round-trip propagation delay of the link (100Mb) 15 bytes | |
685 | ---------- | |
686 | 3187 bytes | |
687 | ||
688 | I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) | |
689 | low-water mark to RX_FIFO_SIZE / 8 (512 bytes) | |
690 | */ | |
691 | r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size, | |
692 | rx_size / 4 / dev->fifo_entry_size); | |
693 | out_be32(&p->rwmr, r); | |
694 | ||
695 | /* Set PAUSE timer to the maximum */ | |
696 | out_be32(&p->ptr, 0xffff); | |
697 | ||
698 | /* IRQ sources */ | |
699 | r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | | |
700 | EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | | |
701 | EMAC_ISR_IRE | EMAC_ISR_TE; | |
702 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
703 | r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE | | |
704 | EMAC4_ISR_RXOE | */; | |
705 | out_be32(&p->iser, r); | |
706 | ||
707 | /* We need to take GPCS PHY out of isolate mode after EMAC reset */ | |
9e3cb294 VG |
708 | if (emac_phy_gpcs(dev->phy.mode)) { |
709 | if (dev->phy.gpcs_address != 0xffffffff) | |
710 | emac_mii_reset_gpcs(&dev->phy); | |
711 | else | |
712 | emac_mii_reset_phy(&dev->phy); | |
713 | } | |
1d3bb996 DG |
714 | |
715 | return 0; | |
716 | } | |
717 | ||
718 | static void emac_reinitialize(struct emac_instance *dev) | |
719 | { | |
720 | DBG(dev, "reinitialize" NL); | |
721 | ||
722 | emac_netif_stop(dev); | |
723 | if (!emac_configure(dev)) { | |
724 | emac_tx_enable(dev); | |
725 | emac_rx_enable(dev); | |
726 | } | |
727 | emac_netif_start(dev); | |
728 | } | |
729 | ||
730 | static void emac_full_tx_reset(struct emac_instance *dev) | |
731 | { | |
732 | DBG(dev, "full_tx_reset" NL); | |
733 | ||
734 | emac_tx_disable(dev); | |
735 | mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); | |
736 | emac_clean_tx_ring(dev); | |
737 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; | |
738 | ||
739 | emac_configure(dev); | |
740 | ||
741 | mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); | |
742 | emac_tx_enable(dev); | |
743 | emac_rx_enable(dev); | |
744 | } | |
745 | ||
746 | static void emac_reset_work(struct work_struct *work) | |
747 | { | |
748 | struct emac_instance *dev = container_of(work, struct emac_instance, reset_work); | |
749 | ||
750 | DBG(dev, "reset_work" NL); | |
751 | ||
752 | mutex_lock(&dev->link_lock); | |
61dbcece BH |
753 | if (dev->opened) { |
754 | emac_netif_stop(dev); | |
755 | emac_full_tx_reset(dev); | |
756 | emac_netif_start(dev); | |
757 | } | |
1d3bb996 DG |
758 | mutex_unlock(&dev->link_lock); |
759 | } | |
760 | ||
761 | static void emac_tx_timeout(struct net_device *ndev) | |
762 | { | |
763 | struct emac_instance *dev = netdev_priv(ndev); | |
764 | ||
765 | DBG(dev, "tx_timeout" NL); | |
766 | ||
767 | schedule_work(&dev->reset_work); | |
768 | } | |
769 | ||
770 | ||
771 | static inline int emac_phy_done(struct emac_instance *dev, u32 stacr) | |
772 | { | |
773 | int done = !!(stacr & EMAC_STACR_OC); | |
774 | ||
775 | if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) | |
776 | done = !done; | |
777 | ||
778 | return done; | |
779 | }; | |
780 | ||
781 | static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg) | |
782 | { | |
783 | struct emac_regs __iomem *p = dev->emacp; | |
784 | u32 r = 0; | |
785 | int n, err = -ETIMEDOUT; | |
786 | ||
787 | mutex_lock(&dev->mdio_lock); | |
788 | ||
789 | DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg); | |
790 | ||
791 | /* Enable proper MDIO port */ | |
792 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
793 | zmii_get_mdio(dev->zmii_dev, dev->zmii_port); | |
794 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
795 | rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); | |
796 | ||
797 | /* Wait for management interface to become idle */ | |
cca87c18 | 798 | n = 20; |
1d3bb996 DG |
799 | while (!emac_phy_done(dev, in_be32(&p->stacr))) { |
800 | udelay(1); | |
801 | if (!--n) { | |
802 | DBG2(dev, " -> timeout wait idle\n"); | |
803 | goto bail; | |
804 | } | |
805 | } | |
806 | ||
807 | /* Issue read command */ | |
808 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
809 | r = EMAC4_STACR_BASE(dev->opb_bus_freq); | |
810 | else | |
811 | r = EMAC_STACR_BASE(dev->opb_bus_freq); | |
812 | if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) | |
813 | r |= EMAC_STACR_OC; | |
bff713b5 | 814 | if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) |
1d3bb996 DG |
815 | r |= EMACX_STACR_STAC_READ; |
816 | else | |
817 | r |= EMAC_STACR_STAC_READ; | |
818 | r |= (reg & EMAC_STACR_PRA_MASK) | |
819 | | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT); | |
820 | out_be32(&p->stacr, r); | |
821 | ||
822 | /* Wait for read to complete */ | |
cca87c18 | 823 | n = 200; |
1d3bb996 DG |
824 | while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) { |
825 | udelay(1); | |
826 | if (!--n) { | |
827 | DBG2(dev, " -> timeout wait complete\n"); | |
828 | goto bail; | |
829 | } | |
830 | } | |
831 | ||
832 | if (unlikely(r & EMAC_STACR_PHYE)) { | |
833 | DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg); | |
834 | err = -EREMOTEIO; | |
835 | goto bail; | |
836 | } | |
837 | ||
838 | r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); | |
839 | ||
840 | DBG2(dev, "mdio_read -> %04x" NL, r); | |
841 | err = 0; | |
842 | bail: | |
843 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
844 | rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); | |
845 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
846 | zmii_put_mdio(dev->zmii_dev, dev->zmii_port); | |
847 | mutex_unlock(&dev->mdio_lock); | |
848 | ||
849 | return err == 0 ? r : err; | |
850 | } | |
851 | ||
852 | static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg, | |
853 | u16 val) | |
854 | { | |
855 | struct emac_regs __iomem *p = dev->emacp; | |
856 | u32 r = 0; | |
857 | int n, err = -ETIMEDOUT; | |
858 | ||
859 | mutex_lock(&dev->mdio_lock); | |
860 | ||
861 | DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val); | |
862 | ||
863 | /* Enable proper MDIO port */ | |
864 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
865 | zmii_get_mdio(dev->zmii_dev, dev->zmii_port); | |
866 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
867 | rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); | |
868 | ||
869 | /* Wait for management interface to be idle */ | |
cca87c18 | 870 | n = 20; |
1d3bb996 DG |
871 | while (!emac_phy_done(dev, in_be32(&p->stacr))) { |
872 | udelay(1); | |
873 | if (!--n) { | |
874 | DBG2(dev, " -> timeout wait idle\n"); | |
875 | goto bail; | |
876 | } | |
877 | } | |
878 | ||
879 | /* Issue write command */ | |
880 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
881 | r = EMAC4_STACR_BASE(dev->opb_bus_freq); | |
882 | else | |
883 | r = EMAC_STACR_BASE(dev->opb_bus_freq); | |
884 | if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) | |
885 | r |= EMAC_STACR_OC; | |
bff713b5 | 886 | if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) |
1d3bb996 DG |
887 | r |= EMACX_STACR_STAC_WRITE; |
888 | else | |
889 | r |= EMAC_STACR_STAC_WRITE; | |
890 | r |= (reg & EMAC_STACR_PRA_MASK) | | |
891 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | | |
892 | (val << EMAC_STACR_PHYD_SHIFT); | |
893 | out_be32(&p->stacr, r); | |
894 | ||
895 | /* Wait for write to complete */ | |
cca87c18 | 896 | n = 200; |
1d3bb996 DG |
897 | while (!emac_phy_done(dev, in_be32(&p->stacr))) { |
898 | udelay(1); | |
899 | if (!--n) { | |
900 | DBG2(dev, " -> timeout wait complete\n"); | |
901 | goto bail; | |
902 | } | |
903 | } | |
904 | err = 0; | |
905 | bail: | |
906 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
907 | rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); | |
908 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
909 | zmii_put_mdio(dev->zmii_dev, dev->zmii_port); | |
910 | mutex_unlock(&dev->mdio_lock); | |
911 | } | |
912 | ||
913 | static int emac_mdio_read(struct net_device *ndev, int id, int reg) | |
914 | { | |
915 | struct emac_instance *dev = netdev_priv(ndev); | |
916 | int res; | |
917 | ||
9e3cb294 VG |
918 | res = __emac_mdio_read((dev->mdio_instance && |
919 | dev->phy.gpcs_address != id) ? | |
920 | dev->mdio_instance : dev, | |
1d3bb996 DG |
921 | (u8) id, (u8) reg); |
922 | return res; | |
923 | } | |
924 | ||
925 | static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) | |
926 | { | |
927 | struct emac_instance *dev = netdev_priv(ndev); | |
928 | ||
9e3cb294 VG |
929 | __emac_mdio_write((dev->mdio_instance && |
930 | dev->phy.gpcs_address != id) ? | |
931 | dev->mdio_instance : dev, | |
1d3bb996 DG |
932 | (u8) id, (u8) reg, (u16) val); |
933 | } | |
934 | ||
935 | /* Tx lock BH */ | |
936 | static void __emac_set_multicast_list(struct emac_instance *dev) | |
937 | { | |
938 | struct emac_regs __iomem *p = dev->emacp; | |
939 | u32 rmr = emac_iff2rmr(dev->ndev); | |
940 | ||
941 | DBG(dev, "__multicast %08x" NL, rmr); | |
942 | ||
943 | /* I decided to relax register access rules here to avoid | |
944 | * full EMAC reset. | |
945 | * | |
946 | * There is a real problem with EMAC4 core if we use MWSW_001 bit | |
947 | * in MR1 register and do a full EMAC reset. | |
948 | * One TX BD status update is delayed and, after EMAC reset, it | |
949 | * never happens, resulting in TX hung (it'll be recovered by TX | |
950 | * timeout handler eventually, but this is just gross). | |
951 | * So we either have to do full TX reset or try to cheat here :) | |
952 | * | |
953 | * The only required change is to RX mode register, so I *think* all | |
954 | * we need is just to stop RX channel. This seems to work on all | |
955 | * tested SoCs. --ebs | |
956 | * | |
957 | * If we need the full reset, we might just trigger the workqueue | |
958 | * and do it async... a bit nasty but should work --BenH | |
959 | */ | |
960 | dev->mcast_pending = 0; | |
961 | emac_rx_disable(dev); | |
962 | if (rmr & EMAC_RMR_MAE) | |
963 | emac_hash_mc(dev); | |
964 | out_be32(&p->rmr, rmr); | |
965 | emac_rx_enable(dev); | |
966 | } | |
967 | ||
968 | /* Tx lock BH */ | |
969 | static void emac_set_multicast_list(struct net_device *ndev) | |
970 | { | |
971 | struct emac_instance *dev = netdev_priv(ndev); | |
972 | ||
973 | DBG(dev, "multicast" NL); | |
974 | ||
975 | BUG_ON(!netif_running(dev->ndev)); | |
976 | ||
977 | if (dev->no_mcast) { | |
978 | dev->mcast_pending = 1; | |
979 | return; | |
980 | } | |
7106a069 IM |
981 | |
982 | mutex_lock(&dev->link_lock); | |
1d3bb996 | 983 | __emac_set_multicast_list(dev); |
7106a069 | 984 | mutex_unlock(&dev->link_lock); |
1d3bb996 DG |
985 | } |
986 | ||
01afd972 IM |
987 | static int emac_set_mac_address(struct net_device *ndev, void *sa) |
988 | { | |
989 | struct emac_instance *dev = netdev_priv(ndev); | |
990 | struct sockaddr *addr = sa; | |
991 | struct emac_regs __iomem *p = dev->emacp; | |
992 | ||
993 | if (!is_valid_ether_addr(addr->sa_data)) | |
994 | return -EADDRNOTAVAIL; | |
995 | ||
996 | mutex_lock(&dev->link_lock); | |
997 | ||
998 | memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); | |
999 | ||
1000 | emac_rx_disable(dev); | |
1001 | emac_tx_disable(dev); | |
1002 | out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); | |
1003 | out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | | |
1004 | (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | | |
1005 | ndev->dev_addr[5]); | |
1006 | emac_tx_enable(dev); | |
1007 | emac_rx_enable(dev); | |
1008 | ||
1009 | mutex_unlock(&dev->link_lock); | |
1010 | ||
1011 | return 0; | |
1d3bb996 DG |
1012 | } |
1013 | ||
1014 | static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu) | |
1015 | { | |
1016 | int rx_sync_size = emac_rx_sync_size(new_mtu); | |
1017 | int rx_skb_size = emac_rx_skb_size(new_mtu); | |
1018 | int i, ret = 0; | |
ae5d3372 | 1019 | int mr1_jumbo_bit_change = 0; |
1d3bb996 DG |
1020 | |
1021 | mutex_lock(&dev->link_lock); | |
1022 | emac_netif_stop(dev); | |
1023 | emac_rx_disable(dev); | |
1024 | mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1025 | ||
1026 | if (dev->rx_sg_skb) { | |
1027 | ++dev->estats.rx_dropped_resize; | |
1028 | dev_kfree_skb(dev->rx_sg_skb); | |
1029 | dev->rx_sg_skb = NULL; | |
1030 | } | |
1031 | ||
1032 | /* Make a first pass over RX ring and mark BDs ready, dropping | |
1033 | * non-processed packets on the way. We need this as a separate pass | |
1034 | * to simplify error recovery in the case of allocation failure later. | |
1035 | */ | |
1036 | for (i = 0; i < NUM_RX_BUFF; ++i) { | |
1037 | if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) | |
1038 | ++dev->estats.rx_dropped_resize; | |
1039 | ||
1040 | dev->rx_desc[i].data_len = 0; | |
1041 | dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | | |
1042 | (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1043 | } | |
1044 | ||
1045 | /* Reallocate RX ring only if bigger skb buffers are required */ | |
1046 | if (rx_skb_size <= dev->rx_skb_size) | |
1047 | goto skip; | |
1048 | ||
1049 | /* Second pass, allocate new skbs */ | |
1050 | for (i = 0; i < NUM_RX_BUFF; ++i) { | |
1051 | struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); | |
1052 | if (!skb) { | |
1053 | ret = -ENOMEM; | |
1054 | goto oom; | |
1055 | } | |
1056 | ||
1057 | BUG_ON(!dev->rx_skb[i]); | |
1058 | dev_kfree_skb(dev->rx_skb[i]); | |
1059 | ||
1060 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); | |
1061 | dev->rx_desc[i].data_ptr = | |
1062 | dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size, | |
1063 | DMA_FROM_DEVICE) + 2; | |
1064 | dev->rx_skb[i] = skb; | |
1065 | } | |
1066 | skip: | |
1067 | /* Check if we need to change "Jumbo" bit in MR1 */ | |
ae5d3372 DD |
1068 | if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) { |
1069 | mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) || | |
1070 | (dev->ndev->mtu > ETH_DATA_LEN); | |
1071 | } else { | |
1072 | mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^ | |
1073 | (dev->ndev->mtu > ETH_DATA_LEN); | |
1074 | } | |
1075 | ||
1076 | if (mr1_jumbo_bit_change) { | |
1d3bb996 DG |
1077 | /* This is to prevent starting RX channel in emac_rx_enable() */ |
1078 | set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
1079 | ||
1080 | dev->ndev->mtu = new_mtu; | |
1081 | emac_full_tx_reset(dev); | |
1082 | } | |
1083 | ||
1084 | mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu)); | |
1085 | oom: | |
1086 | /* Restart RX */ | |
1087 | clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
1088 | dev->rx_slot = 0; | |
1089 | mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1090 | emac_rx_enable(dev); | |
1091 | emac_netif_start(dev); | |
1092 | mutex_unlock(&dev->link_lock); | |
1093 | ||
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | /* Process ctx, rtnl_lock semaphore */ | |
1098 | static int emac_change_mtu(struct net_device *ndev, int new_mtu) | |
1099 | { | |
1100 | struct emac_instance *dev = netdev_priv(ndev); | |
1101 | int ret = 0; | |
1102 | ||
1d3bb996 DG |
1103 | DBG(dev, "change_mtu(%d)" NL, new_mtu); |
1104 | ||
1105 | if (netif_running(ndev)) { | |
421f91d2 | 1106 | /* Check if we really need to reinitialize RX ring */ |
1d3bb996 DG |
1107 | if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) |
1108 | ret = emac_resize_rx_ring(dev, new_mtu); | |
1109 | } | |
1110 | ||
1111 | if (!ret) { | |
1112 | ndev->mtu = new_mtu; | |
1113 | dev->rx_skb_size = emac_rx_skb_size(new_mtu); | |
1114 | dev->rx_sync_size = emac_rx_sync_size(new_mtu); | |
1115 | } | |
1116 | ||
1117 | return ret; | |
1118 | } | |
1119 | ||
1120 | static void emac_clean_tx_ring(struct emac_instance *dev) | |
1121 | { | |
1122 | int i; | |
1123 | ||
1124 | for (i = 0; i < NUM_TX_BUFF; ++i) { | |
1125 | if (dev->tx_skb[i]) { | |
1126 | dev_kfree_skb(dev->tx_skb[i]); | |
1127 | dev->tx_skb[i] = NULL; | |
1128 | if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) | |
1129 | ++dev->estats.tx_dropped; | |
1130 | } | |
1131 | dev->tx_desc[i].ctrl = 0; | |
1132 | dev->tx_desc[i].data_ptr = 0; | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | static void emac_clean_rx_ring(struct emac_instance *dev) | |
1137 | { | |
1138 | int i; | |
1139 | ||
1140 | for (i = 0; i < NUM_RX_BUFF; ++i) | |
1141 | if (dev->rx_skb[i]) { | |
1142 | dev->rx_desc[i].ctrl = 0; | |
1143 | dev_kfree_skb(dev->rx_skb[i]); | |
1144 | dev->rx_skb[i] = NULL; | |
1145 | dev->rx_desc[i].data_ptr = 0; | |
1146 | } | |
1147 | ||
1148 | if (dev->rx_sg_skb) { | |
1149 | dev_kfree_skb(dev->rx_sg_skb); | |
1150 | dev->rx_sg_skb = NULL; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot, | |
1155 | gfp_t flags) | |
1156 | { | |
1157 | struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); | |
1158 | if (unlikely(!skb)) | |
1159 | return -ENOMEM; | |
1160 | ||
1161 | dev->rx_skb[slot] = skb; | |
1162 | dev->rx_desc[slot].data_len = 0; | |
1163 | ||
1164 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); | |
1165 | dev->rx_desc[slot].data_ptr = | |
1166 | dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size, | |
1167 | DMA_FROM_DEVICE) + 2; | |
1168 | wmb(); | |
1169 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | | |
1170 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static void emac_print_link_status(struct emac_instance *dev) | |
1176 | { | |
1177 | if (netif_carrier_ok(dev->ndev)) | |
1178 | printk(KERN_INFO "%s: link is up, %d %s%s\n", | |
1179 | dev->ndev->name, dev->phy.speed, | |
1180 | dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", | |
1181 | dev->phy.pause ? ", pause enabled" : | |
1182 | dev->phy.asym_pause ? ", asymmetric pause enabled" : ""); | |
1183 | else | |
1184 | printk(KERN_INFO "%s: link is down\n", dev->ndev->name); | |
1185 | } | |
1186 | ||
1187 | /* Process ctx, rtnl_lock semaphore */ | |
1188 | static int emac_open(struct net_device *ndev) | |
1189 | { | |
1190 | struct emac_instance *dev = netdev_priv(ndev); | |
1191 | int err, i; | |
1192 | ||
1193 | DBG(dev, "open" NL); | |
1194 | ||
1195 | /* Setup error IRQ handler */ | |
1196 | err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev); | |
1197 | if (err) { | |
1198 | printk(KERN_ERR "%s: failed to request IRQ %d\n", | |
1199 | ndev->name, dev->emac_irq); | |
1200 | return err; | |
1201 | } | |
1202 | ||
1203 | /* Allocate RX ring */ | |
1204 | for (i = 0; i < NUM_RX_BUFF; ++i) | |
1205 | if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { | |
1206 | printk(KERN_ERR "%s: failed to allocate RX ring\n", | |
1207 | ndev->name); | |
1208 | goto oom; | |
1209 | } | |
1210 | ||
1211 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0; | |
1212 | clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
1213 | dev->rx_sg_skb = NULL; | |
1214 | ||
1215 | mutex_lock(&dev->link_lock); | |
61dbcece | 1216 | dev->opened = 1; |
1d3bb996 | 1217 | |
61dbcece | 1218 | /* Start PHY polling now. |
1d3bb996 DG |
1219 | */ |
1220 | if (dev->phy.address >= 0) { | |
1221 | int link_poll_interval; | |
1222 | if (dev->phy.def->ops->poll_link(&dev->phy)) { | |
1223 | dev->phy.def->ops->read_link(&dev->phy); | |
11121e30 | 1224 | emac_rx_clk_default(dev); |
1d3bb996 DG |
1225 | netif_carrier_on(dev->ndev); |
1226 | link_poll_interval = PHY_POLL_LINK_ON; | |
1227 | } else { | |
11121e30 | 1228 | emac_rx_clk_tx(dev); |
1d3bb996 DG |
1229 | netif_carrier_off(dev->ndev); |
1230 | link_poll_interval = PHY_POLL_LINK_OFF; | |
1231 | } | |
1232 | dev->link_polling = 1; | |
1233 | wmb(); | |
1234 | schedule_delayed_work(&dev->link_work, link_poll_interval); | |
1235 | emac_print_link_status(dev); | |
1236 | } else | |
1237 | netif_carrier_on(dev->ndev); | |
1238 | ||
e8296582 | 1239 | /* Required for Pause packet support in EMAC */ |
22bedad3 | 1240 | dev_mc_add_global(ndev, default_mcast_addr); |
e8296582 | 1241 | |
1d3bb996 DG |
1242 | emac_configure(dev); |
1243 | mal_poll_add(dev->mal, &dev->commac); | |
1244 | mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); | |
1245 | mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu)); | |
1246 | mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1247 | emac_tx_enable(dev); | |
1248 | emac_rx_enable(dev); | |
1249 | emac_netif_start(dev); | |
1250 | ||
1251 | mutex_unlock(&dev->link_lock); | |
1252 | ||
1253 | return 0; | |
1254 | oom: | |
1255 | emac_clean_rx_ring(dev); | |
1256 | free_irq(dev->emac_irq, dev); | |
1257 | ||
1258 | return -ENOMEM; | |
1259 | } | |
1260 | ||
1261 | /* BHs disabled */ | |
1262 | #if 0 | |
1263 | static int emac_link_differs(struct emac_instance *dev) | |
1264 | { | |
1265 | u32 r = in_be32(&dev->emacp->mr1); | |
1266 | ||
1267 | int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; | |
1268 | int speed, pause, asym_pause; | |
1269 | ||
1270 | if (r & EMAC_MR1_MF_1000) | |
1271 | speed = SPEED_1000; | |
1272 | else if (r & EMAC_MR1_MF_100) | |
1273 | speed = SPEED_100; | |
1274 | else | |
1275 | speed = SPEED_10; | |
1276 | ||
1277 | switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { | |
1278 | case (EMAC_MR1_EIFC | EMAC_MR1_APP): | |
1279 | pause = 1; | |
1280 | asym_pause = 0; | |
1281 | break; | |
1282 | case EMAC_MR1_APP: | |
1283 | pause = 0; | |
1284 | asym_pause = 1; | |
1285 | break; | |
1286 | default: | |
1287 | pause = asym_pause = 0; | |
1288 | } | |
1289 | return speed != dev->phy.speed || duplex != dev->phy.duplex || | |
1290 | pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; | |
1291 | } | |
1292 | #endif | |
1293 | ||
1294 | static void emac_link_timer(struct work_struct *work) | |
1295 | { | |
1296 | struct emac_instance *dev = | |
10fd9d7e | 1297 | container_of(to_delayed_work(work), |
1d3bb996 DG |
1298 | struct emac_instance, link_work); |
1299 | int link_poll_interval; | |
1300 | ||
1301 | mutex_lock(&dev->link_lock); | |
1d3bb996 DG |
1302 | DBG2(dev, "link timer" NL); |
1303 | ||
61dbcece BH |
1304 | if (!dev->opened) |
1305 | goto bail; | |
1306 | ||
1d3bb996 DG |
1307 | if (dev->phy.def->ops->poll_link(&dev->phy)) { |
1308 | if (!netif_carrier_ok(dev->ndev)) { | |
11121e30 | 1309 | emac_rx_clk_default(dev); |
1d3bb996 DG |
1310 | /* Get new link parameters */ |
1311 | dev->phy.def->ops->read_link(&dev->phy); | |
1312 | ||
1313 | netif_carrier_on(dev->ndev); | |
1314 | emac_netif_stop(dev); | |
1315 | emac_full_tx_reset(dev); | |
1316 | emac_netif_start(dev); | |
1317 | emac_print_link_status(dev); | |
1318 | } | |
1319 | link_poll_interval = PHY_POLL_LINK_ON; | |
1320 | } else { | |
1321 | if (netif_carrier_ok(dev->ndev)) { | |
11121e30 | 1322 | emac_rx_clk_tx(dev); |
1d3bb996 DG |
1323 | netif_carrier_off(dev->ndev); |
1324 | netif_tx_disable(dev->ndev); | |
911b237d | 1325 | emac_reinitialize(dev); |
1d3bb996 DG |
1326 | emac_print_link_status(dev); |
1327 | } | |
1328 | link_poll_interval = PHY_POLL_LINK_OFF; | |
1329 | } | |
1330 | schedule_delayed_work(&dev->link_work, link_poll_interval); | |
61dbcece | 1331 | bail: |
1d3bb996 DG |
1332 | mutex_unlock(&dev->link_lock); |
1333 | } | |
1334 | ||
1335 | static void emac_force_link_update(struct emac_instance *dev) | |
1336 | { | |
1337 | netif_carrier_off(dev->ndev); | |
61dbcece | 1338 | smp_rmb(); |
1d3bb996 | 1339 | if (dev->link_polling) { |
afe2c511 | 1340 | cancel_delayed_work_sync(&dev->link_work); |
1d3bb996 DG |
1341 | if (dev->link_polling) |
1342 | schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF); | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | /* Process ctx, rtnl_lock semaphore */ | |
1347 | static int emac_close(struct net_device *ndev) | |
1348 | { | |
1349 | struct emac_instance *dev = netdev_priv(ndev); | |
1350 | ||
1351 | DBG(dev, "close" NL); | |
1352 | ||
61dbcece BH |
1353 | if (dev->phy.address >= 0) { |
1354 | dev->link_polling = 0; | |
afe2c511 | 1355 | cancel_delayed_work_sync(&dev->link_work); |
61dbcece BH |
1356 | } |
1357 | mutex_lock(&dev->link_lock); | |
1d3bb996 | 1358 | emac_netif_stop(dev); |
61dbcece BH |
1359 | dev->opened = 0; |
1360 | mutex_unlock(&dev->link_lock); | |
1d3bb996 DG |
1361 | |
1362 | emac_rx_disable(dev); | |
1363 | emac_tx_disable(dev); | |
1364 | mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1365 | mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); | |
1366 | mal_poll_del(dev->mal, &dev->commac); | |
1367 | ||
1368 | emac_clean_tx_ring(dev); | |
1369 | emac_clean_rx_ring(dev); | |
1370 | ||
1371 | free_irq(dev->emac_irq, dev); | |
1372 | ||
d3b325f9 PG |
1373 | netif_carrier_off(ndev); |
1374 | ||
1d3bb996 DG |
1375 | return 0; |
1376 | } | |
1377 | ||
1378 | static inline u16 emac_tx_csum(struct emac_instance *dev, | |
1379 | struct sk_buff *skb) | |
1380 | { | |
e66f4168 VB |
1381 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && |
1382 | (skb->ip_summed == CHECKSUM_PARTIAL)) { | |
1d3bb996 DG |
1383 | ++dev->stats.tx_packets_csum; |
1384 | return EMAC_TX_CTRL_TAH_CSUM; | |
1385 | } | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static inline int emac_xmit_finish(struct emac_instance *dev, int len) | |
1390 | { | |
1391 | struct emac_regs __iomem *p = dev->emacp; | |
1392 | struct net_device *ndev = dev->ndev; | |
1393 | ||
1394 | /* Send the packet out. If the if makes a significant perf | |
1395 | * difference, then we can store the TMR0 value in "dev" | |
1396 | * instead | |
1397 | */ | |
1398 | if (emac_has_feature(dev, EMAC_FTR_EMAC4)) | |
1d3bb996 | 1399 | out_be32(&p->tmr0, EMAC4_TMR0_XMIT); |
07c2c76e | 1400 | else |
1401 | out_be32(&p->tmr0, EMAC_TMR0_XMIT); | |
1d3bb996 DG |
1402 | |
1403 | if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { | |
1404 | netif_stop_queue(ndev); | |
1405 | DBG2(dev, "stopped TX queue" NL); | |
1406 | } | |
1407 | ||
860e9538 | 1408 | netif_trans_update(ndev); |
1d3bb996 DG |
1409 | ++dev->stats.tx_packets; |
1410 | dev->stats.tx_bytes += len; | |
1411 | ||
ec634fe3 | 1412 | return NETDEV_TX_OK; |
1d3bb996 DG |
1413 | } |
1414 | ||
1415 | /* Tx lock BH */ | |
1416 | static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1417 | { | |
1418 | struct emac_instance *dev = netdev_priv(ndev); | |
1419 | unsigned int len = skb->len; | |
1420 | int slot; | |
1421 | ||
1422 | u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | | |
1423 | MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); | |
1424 | ||
1425 | slot = dev->tx_slot++; | |
1426 | if (dev->tx_slot == NUM_TX_BUFF) { | |
1427 | dev->tx_slot = 0; | |
1428 | ctrl |= MAL_TX_CTRL_WRAP; | |
1429 | } | |
1430 | ||
1431 | DBG2(dev, "xmit(%u) %d" NL, len, slot); | |
1432 | ||
1433 | dev->tx_skb[slot] = skb; | |
1434 | dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev, | |
1435 | skb->data, len, | |
1436 | DMA_TO_DEVICE); | |
1437 | dev->tx_desc[slot].data_len = (u16) len; | |
1438 | wmb(); | |
1439 | dev->tx_desc[slot].ctrl = ctrl; | |
1440 | ||
1441 | return emac_xmit_finish(dev, len); | |
1442 | } | |
1443 | ||
1d3bb996 DG |
1444 | static inline int emac_xmit_split(struct emac_instance *dev, int slot, |
1445 | u32 pd, int len, int last, u16 base_ctrl) | |
1446 | { | |
1447 | while (1) { | |
1448 | u16 ctrl = base_ctrl; | |
1449 | int chunk = min(len, MAL_MAX_TX_SIZE); | |
1450 | len -= chunk; | |
1451 | ||
1452 | slot = (slot + 1) % NUM_TX_BUFF; | |
1453 | ||
1454 | if (last && !len) | |
1455 | ctrl |= MAL_TX_CTRL_LAST; | |
1456 | if (slot == NUM_TX_BUFF - 1) | |
1457 | ctrl |= MAL_TX_CTRL_WRAP; | |
1458 | ||
1459 | dev->tx_skb[slot] = NULL; | |
1460 | dev->tx_desc[slot].data_ptr = pd; | |
1461 | dev->tx_desc[slot].data_len = (u16) chunk; | |
1462 | dev->tx_desc[slot].ctrl = ctrl; | |
1463 | ++dev->tx_cnt; | |
1464 | ||
1465 | if (!len) | |
1466 | break; | |
1467 | ||
1468 | pd += chunk; | |
1469 | } | |
1470 | return slot; | |
1471 | } | |
1472 | ||
1473 | /* Tx lock BH disabled (SG version for TAH equipped EMACs) */ | |
1474 | static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) | |
1475 | { | |
1476 | struct emac_instance *dev = netdev_priv(ndev); | |
1477 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
1478 | int len = skb->len, chunk; | |
1479 | int slot, i; | |
1480 | u16 ctrl; | |
1481 | u32 pd; | |
1482 | ||
1483 | /* This is common "fast" path */ | |
1484 | if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) | |
1485 | return emac_start_xmit(skb, ndev); | |
1486 | ||
1487 | len -= skb->data_len; | |
1488 | ||
1489 | /* Note, this is only an *estimation*, we can still run out of empty | |
1490 | * slots because of the additional fragmentation into | |
1491 | * MAL_MAX_TX_SIZE-sized chunks | |
1492 | */ | |
1493 | if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) | |
1494 | goto stop_queue; | |
1495 | ||
1496 | ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | | |
1497 | emac_tx_csum(dev, skb); | |
1498 | slot = dev->tx_slot; | |
1499 | ||
1500 | /* skb data */ | |
1501 | dev->tx_skb[slot] = NULL; | |
1502 | chunk = min(len, MAL_MAX_TX_SIZE); | |
1503 | dev->tx_desc[slot].data_ptr = pd = | |
1504 | dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE); | |
1505 | dev->tx_desc[slot].data_len = (u16) chunk; | |
1506 | len -= chunk; | |
1507 | if (unlikely(len)) | |
1508 | slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, | |
1509 | ctrl); | |
1510 | /* skb fragments */ | |
1511 | for (i = 0; i < nr_frags; ++i) { | |
1512 | struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; | |
9e903e08 | 1513 | len = skb_frag_size(frag); |
1d3bb996 DG |
1514 | |
1515 | if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) | |
1516 | goto undo_frame; | |
1517 | ||
f8f114c2 IC |
1518 | pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len, |
1519 | DMA_TO_DEVICE); | |
1d3bb996 DG |
1520 | |
1521 | slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, | |
1522 | ctrl); | |
1523 | } | |
1524 | ||
1525 | DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot); | |
1526 | ||
1527 | /* Attach skb to the last slot so we don't release it too early */ | |
1528 | dev->tx_skb[slot] = skb; | |
1529 | ||
1530 | /* Send the packet out */ | |
1531 | if (dev->tx_slot == NUM_TX_BUFF - 1) | |
1532 | ctrl |= MAL_TX_CTRL_WRAP; | |
1533 | wmb(); | |
1534 | dev->tx_desc[dev->tx_slot].ctrl = ctrl; | |
1535 | dev->tx_slot = (slot + 1) % NUM_TX_BUFF; | |
1536 | ||
1537 | return emac_xmit_finish(dev, skb->len); | |
1538 | ||
1539 | undo_frame: | |
1540 | /* Well, too bad. Our previous estimation was overly optimistic. | |
1541 | * Undo everything. | |
1542 | */ | |
1543 | while (slot != dev->tx_slot) { | |
1544 | dev->tx_desc[slot].ctrl = 0; | |
1545 | --dev->tx_cnt; | |
1546 | if (--slot < 0) | |
1547 | slot = NUM_TX_BUFF - 1; | |
1548 | } | |
1549 | ++dev->estats.tx_undo; | |
1550 | ||
1551 | stop_queue: | |
1552 | netif_stop_queue(ndev); | |
1553 | DBG2(dev, "stopped TX queue" NL); | |
5b548140 | 1554 | return NETDEV_TX_BUSY; |
1d3bb996 | 1555 | } |
1d3bb996 DG |
1556 | |
1557 | /* Tx lock BHs */ | |
1558 | static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl) | |
1559 | { | |
1560 | struct emac_error_stats *st = &dev->estats; | |
1561 | ||
1562 | DBG(dev, "BD TX error %04x" NL, ctrl); | |
1563 | ||
1564 | ++st->tx_bd_errors; | |
1565 | if (ctrl & EMAC_TX_ST_BFCS) | |
1566 | ++st->tx_bd_bad_fcs; | |
1567 | if (ctrl & EMAC_TX_ST_LCS) | |
1568 | ++st->tx_bd_carrier_loss; | |
1569 | if (ctrl & EMAC_TX_ST_ED) | |
1570 | ++st->tx_bd_excessive_deferral; | |
1571 | if (ctrl & EMAC_TX_ST_EC) | |
1572 | ++st->tx_bd_excessive_collisions; | |
1573 | if (ctrl & EMAC_TX_ST_LC) | |
1574 | ++st->tx_bd_late_collision; | |
1575 | if (ctrl & EMAC_TX_ST_MC) | |
1576 | ++st->tx_bd_multple_collisions; | |
1577 | if (ctrl & EMAC_TX_ST_SC) | |
1578 | ++st->tx_bd_single_collision; | |
1579 | if (ctrl & EMAC_TX_ST_UR) | |
1580 | ++st->tx_bd_underrun; | |
1581 | if (ctrl & EMAC_TX_ST_SQE) | |
1582 | ++st->tx_bd_sqe; | |
1583 | } | |
1584 | ||
1585 | static void emac_poll_tx(void *param) | |
1586 | { | |
1587 | struct emac_instance *dev = param; | |
1588 | u32 bad_mask; | |
1589 | ||
1590 | DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot); | |
1591 | ||
1592 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
1593 | bad_mask = EMAC_IS_BAD_TX_TAH; | |
1594 | else | |
1595 | bad_mask = EMAC_IS_BAD_TX; | |
1596 | ||
1597 | netif_tx_lock_bh(dev->ndev); | |
1598 | if (dev->tx_cnt) { | |
1599 | u16 ctrl; | |
1600 | int slot = dev->ack_slot, n = 0; | |
1601 | again: | |
1602 | ctrl = dev->tx_desc[slot].ctrl; | |
1603 | if (!(ctrl & MAL_TX_CTRL_READY)) { | |
1604 | struct sk_buff *skb = dev->tx_skb[slot]; | |
1605 | ++n; | |
1606 | ||
1607 | if (skb) { | |
1608 | dev_kfree_skb(skb); | |
1609 | dev->tx_skb[slot] = NULL; | |
1610 | } | |
1611 | slot = (slot + 1) % NUM_TX_BUFF; | |
1612 | ||
1613 | if (unlikely(ctrl & bad_mask)) | |
1614 | emac_parse_tx_error(dev, ctrl); | |
1615 | ||
1616 | if (--dev->tx_cnt) | |
1617 | goto again; | |
1618 | } | |
1619 | if (n) { | |
1620 | dev->ack_slot = slot; | |
1621 | if (netif_queue_stopped(dev->ndev) && | |
1622 | dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) | |
1623 | netif_wake_queue(dev->ndev); | |
1624 | ||
1625 | DBG2(dev, "tx %d pkts" NL, n); | |
1626 | } | |
1627 | } | |
1628 | netif_tx_unlock_bh(dev->ndev); | |
1629 | } | |
1630 | ||
1631 | static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot, | |
1632 | int len) | |
1633 | { | |
1634 | struct sk_buff *skb = dev->rx_skb[slot]; | |
1635 | ||
1636 | DBG2(dev, "recycle %d %d" NL, slot, len); | |
1637 | ||
1638 | if (len) | |
1639 | dma_map_single(&dev->ofdev->dev, skb->data - 2, | |
1640 | EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); | |
1641 | ||
1642 | dev->rx_desc[slot].data_len = 0; | |
1643 | wmb(); | |
1644 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | | |
1645 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1646 | } | |
1647 | ||
1648 | static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl) | |
1649 | { | |
1650 | struct emac_error_stats *st = &dev->estats; | |
1651 | ||
1652 | DBG(dev, "BD RX error %04x" NL, ctrl); | |
1653 | ||
1654 | ++st->rx_bd_errors; | |
1655 | if (ctrl & EMAC_RX_ST_OE) | |
1656 | ++st->rx_bd_overrun; | |
1657 | if (ctrl & EMAC_RX_ST_BP) | |
1658 | ++st->rx_bd_bad_packet; | |
1659 | if (ctrl & EMAC_RX_ST_RP) | |
1660 | ++st->rx_bd_runt_packet; | |
1661 | if (ctrl & EMAC_RX_ST_SE) | |
1662 | ++st->rx_bd_short_event; | |
1663 | if (ctrl & EMAC_RX_ST_AE) | |
1664 | ++st->rx_bd_alignment_error; | |
1665 | if (ctrl & EMAC_RX_ST_BFCS) | |
1666 | ++st->rx_bd_bad_fcs; | |
1667 | if (ctrl & EMAC_RX_ST_PTL) | |
1668 | ++st->rx_bd_packet_too_long; | |
1669 | if (ctrl & EMAC_RX_ST_ORE) | |
1670 | ++st->rx_bd_out_of_range; | |
1671 | if (ctrl & EMAC_RX_ST_IRE) | |
1672 | ++st->rx_bd_in_range; | |
1673 | } | |
1674 | ||
1675 | static inline void emac_rx_csum(struct emac_instance *dev, | |
1676 | struct sk_buff *skb, u16 ctrl) | |
1677 | { | |
3b3bceef | 1678 | #ifdef CONFIG_IBM_EMAC_TAH |
1d3bb996 DG |
1679 | if (!ctrl && dev->tah_dev) { |
1680 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1681 | ++dev->stats.rx_packets_csum; | |
1682 | } | |
1683 | #endif | |
1684 | } | |
1685 | ||
1686 | static inline int emac_rx_sg_append(struct emac_instance *dev, int slot) | |
1687 | { | |
1688 | if (likely(dev->rx_sg_skb != NULL)) { | |
1689 | int len = dev->rx_desc[slot].data_len; | |
1690 | int tot_len = dev->rx_sg_skb->len + len; | |
1691 | ||
1692 | if (unlikely(tot_len + 2 > dev->rx_skb_size)) { | |
1693 | ++dev->estats.rx_dropped_mtu; | |
1694 | dev_kfree_skb(dev->rx_sg_skb); | |
1695 | dev->rx_sg_skb = NULL; | |
1696 | } else { | |
b05ae4ee | 1697 | memcpy(skb_tail_pointer(dev->rx_sg_skb), |
1d3bb996 DG |
1698 | dev->rx_skb[slot]->data, len); |
1699 | skb_put(dev->rx_sg_skb, len); | |
1700 | emac_recycle_rx_skb(dev, slot, len); | |
1701 | return 0; | |
1702 | } | |
1703 | } | |
1704 | emac_recycle_rx_skb(dev, slot, 0); | |
1705 | return -1; | |
1706 | } | |
1707 | ||
1708 | /* NAPI poll context */ | |
1709 | static int emac_poll_rx(void *param, int budget) | |
1710 | { | |
1711 | struct emac_instance *dev = param; | |
1712 | int slot = dev->rx_slot, received = 0; | |
1713 | ||
1714 | DBG2(dev, "poll_rx(%d)" NL, budget); | |
1715 | ||
1716 | again: | |
1717 | while (budget > 0) { | |
1718 | int len; | |
1719 | struct sk_buff *skb; | |
1720 | u16 ctrl = dev->rx_desc[slot].ctrl; | |
1721 | ||
1722 | if (ctrl & MAL_RX_CTRL_EMPTY) | |
1723 | break; | |
1724 | ||
1725 | skb = dev->rx_skb[slot]; | |
1726 | mb(); | |
1727 | len = dev->rx_desc[slot].data_len; | |
1728 | ||
1729 | if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) | |
1730 | goto sg; | |
1731 | ||
1732 | ctrl &= EMAC_BAD_RX_MASK; | |
1733 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { | |
1734 | emac_parse_rx_error(dev, ctrl); | |
1735 | ++dev->estats.rx_dropped_error; | |
1736 | emac_recycle_rx_skb(dev, slot, 0); | |
1737 | len = 0; | |
1738 | goto next; | |
1739 | } | |
6c688f42 SN |
1740 | |
1741 | if (len < ETH_HLEN) { | |
1742 | ++dev->estats.rx_dropped_stack; | |
1743 | emac_recycle_rx_skb(dev, slot, len); | |
1744 | goto next; | |
1745 | } | |
1d3bb996 DG |
1746 | |
1747 | if (len && len < EMAC_RX_COPY_THRESH) { | |
1748 | struct sk_buff *copy_skb = | |
1749 | alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); | |
1750 | if (unlikely(!copy_skb)) | |
1751 | goto oom; | |
1752 | ||
1753 | skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); | |
b05ae4ee | 1754 | memcpy(copy_skb->data - 2, skb->data - 2, len + 2); |
1d3bb996 DG |
1755 | emac_recycle_rx_skb(dev, slot, len); |
1756 | skb = copy_skb; | |
1757 | } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) | |
1758 | goto oom; | |
1759 | ||
1760 | skb_put(skb, len); | |
1761 | push_packet: | |
1d3bb996 DG |
1762 | skb->protocol = eth_type_trans(skb, dev->ndev); |
1763 | emac_rx_csum(dev, skb, ctrl); | |
1764 | ||
1765 | if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) | |
1766 | ++dev->estats.rx_dropped_stack; | |
1767 | next: | |
1768 | ++dev->stats.rx_packets; | |
1769 | skip: | |
1770 | dev->stats.rx_bytes += len; | |
1771 | slot = (slot + 1) % NUM_RX_BUFF; | |
1772 | --budget; | |
1773 | ++received; | |
1774 | continue; | |
1775 | sg: | |
1776 | if (ctrl & MAL_RX_CTRL_FIRST) { | |
1777 | BUG_ON(dev->rx_sg_skb); | |
1778 | if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { | |
1779 | DBG(dev, "rx OOM %d" NL, slot); | |
1780 | ++dev->estats.rx_dropped_oom; | |
1781 | emac_recycle_rx_skb(dev, slot, 0); | |
1782 | } else { | |
1783 | dev->rx_sg_skb = skb; | |
1784 | skb_put(skb, len); | |
1785 | } | |
1786 | } else if (!emac_rx_sg_append(dev, slot) && | |
1787 | (ctrl & MAL_RX_CTRL_LAST)) { | |
1788 | ||
1789 | skb = dev->rx_sg_skb; | |
1790 | dev->rx_sg_skb = NULL; | |
1791 | ||
1792 | ctrl &= EMAC_BAD_RX_MASK; | |
1793 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { | |
1794 | emac_parse_rx_error(dev, ctrl); | |
1795 | ++dev->estats.rx_dropped_error; | |
1796 | dev_kfree_skb(skb); | |
1797 | len = 0; | |
1798 | } else | |
1799 | goto push_packet; | |
1800 | } | |
1801 | goto skip; | |
1802 | oom: | |
1803 | DBG(dev, "rx OOM %d" NL, slot); | |
1804 | /* Drop the packet and recycle skb */ | |
1805 | ++dev->estats.rx_dropped_oom; | |
1806 | emac_recycle_rx_skb(dev, slot, 0); | |
1807 | goto next; | |
1808 | } | |
1809 | ||
1810 | if (received) { | |
1811 | DBG2(dev, "rx %d BDs" NL, received); | |
1812 | dev->rx_slot = slot; | |
1813 | } | |
1814 | ||
1815 | if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) { | |
1816 | mb(); | |
1817 | if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { | |
1818 | DBG2(dev, "rx restart" NL); | |
1819 | received = 0; | |
1820 | goto again; | |
1821 | } | |
1822 | ||
1823 | if (dev->rx_sg_skb) { | |
1824 | DBG2(dev, "dropping partial rx packet" NL); | |
1825 | ++dev->estats.rx_dropped_error; | |
1826 | dev_kfree_skb(dev->rx_sg_skb); | |
1827 | dev->rx_sg_skb = NULL; | |
1828 | } | |
1829 | ||
1830 | clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); | |
1831 | mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); | |
1832 | emac_rx_enable(dev); | |
1833 | dev->rx_slot = 0; | |
1834 | } | |
1835 | return received; | |
1836 | } | |
1837 | ||
1838 | /* NAPI poll context */ | |
1839 | static int emac_peek_rx(void *param) | |
1840 | { | |
1841 | struct emac_instance *dev = param; | |
1842 | ||
1843 | return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); | |
1844 | } | |
1845 | ||
1846 | /* NAPI poll context */ | |
1847 | static int emac_peek_rx_sg(void *param) | |
1848 | { | |
1849 | struct emac_instance *dev = param; | |
1850 | ||
1851 | int slot = dev->rx_slot; | |
1852 | while (1) { | |
1853 | u16 ctrl = dev->rx_desc[slot].ctrl; | |
1854 | if (ctrl & MAL_RX_CTRL_EMPTY) | |
1855 | return 0; | |
1856 | else if (ctrl & MAL_RX_CTRL_LAST) | |
1857 | return 1; | |
1858 | ||
1859 | slot = (slot + 1) % NUM_RX_BUFF; | |
1860 | ||
1861 | /* I'm just being paranoid here :) */ | |
1862 | if (unlikely(slot == dev->rx_slot)) | |
1863 | return 0; | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | /* Hard IRQ */ | |
1868 | static void emac_rxde(void *param) | |
1869 | { | |
1870 | struct emac_instance *dev = param; | |
1871 | ||
1872 | ++dev->estats.rx_stopped; | |
1873 | emac_rx_disable_async(dev); | |
1874 | } | |
1875 | ||
1876 | /* Hard IRQ */ | |
1877 | static irqreturn_t emac_irq(int irq, void *dev_instance) | |
1878 | { | |
1879 | struct emac_instance *dev = dev_instance; | |
1880 | struct emac_regs __iomem *p = dev->emacp; | |
1881 | struct emac_error_stats *st = &dev->estats; | |
1882 | u32 isr; | |
1883 | ||
1884 | spin_lock(&dev->lock); | |
1885 | ||
1886 | isr = in_be32(&p->isr); | |
1887 | out_be32(&p->isr, isr); | |
1888 | ||
1889 | DBG(dev, "isr = %08x" NL, isr); | |
1890 | ||
1891 | if (isr & EMAC4_ISR_TXPE) | |
1892 | ++st->tx_parity; | |
1893 | if (isr & EMAC4_ISR_RXPE) | |
1894 | ++st->rx_parity; | |
1895 | if (isr & EMAC4_ISR_TXUE) | |
1896 | ++st->tx_underrun; | |
1897 | if (isr & EMAC4_ISR_RXOE) | |
1898 | ++st->rx_fifo_overrun; | |
1899 | if (isr & EMAC_ISR_OVR) | |
1900 | ++st->rx_overrun; | |
1901 | if (isr & EMAC_ISR_BP) | |
1902 | ++st->rx_bad_packet; | |
1903 | if (isr & EMAC_ISR_RP) | |
1904 | ++st->rx_runt_packet; | |
1905 | if (isr & EMAC_ISR_SE) | |
1906 | ++st->rx_short_event; | |
1907 | if (isr & EMAC_ISR_ALE) | |
1908 | ++st->rx_alignment_error; | |
1909 | if (isr & EMAC_ISR_BFCS) | |
1910 | ++st->rx_bad_fcs; | |
1911 | if (isr & EMAC_ISR_PTLE) | |
1912 | ++st->rx_packet_too_long; | |
1913 | if (isr & EMAC_ISR_ORE) | |
1914 | ++st->rx_out_of_range; | |
1915 | if (isr & EMAC_ISR_IRE) | |
1916 | ++st->rx_in_range; | |
1917 | if (isr & EMAC_ISR_SQE) | |
1918 | ++st->tx_sqe; | |
1919 | if (isr & EMAC_ISR_TE) | |
1920 | ++st->tx_errors; | |
1921 | ||
1922 | spin_unlock(&dev->lock); | |
1923 | ||
1924 | return IRQ_HANDLED; | |
1925 | } | |
1926 | ||
1927 | static struct net_device_stats *emac_stats(struct net_device *ndev) | |
1928 | { | |
1929 | struct emac_instance *dev = netdev_priv(ndev); | |
1930 | struct emac_stats *st = &dev->stats; | |
1931 | struct emac_error_stats *est = &dev->estats; | |
1932 | struct net_device_stats *nst = &dev->nstats; | |
1933 | unsigned long flags; | |
1934 | ||
1935 | DBG2(dev, "stats" NL); | |
1936 | ||
1937 | /* Compute "legacy" statistics */ | |
1938 | spin_lock_irqsave(&dev->lock, flags); | |
1939 | nst->rx_packets = (unsigned long)st->rx_packets; | |
1940 | nst->rx_bytes = (unsigned long)st->rx_bytes; | |
1941 | nst->tx_packets = (unsigned long)st->tx_packets; | |
1942 | nst->tx_bytes = (unsigned long)st->tx_bytes; | |
1943 | nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + | |
1944 | est->rx_dropped_error + | |
1945 | est->rx_dropped_resize + | |
1946 | est->rx_dropped_mtu); | |
1947 | nst->tx_dropped = (unsigned long)est->tx_dropped; | |
1948 | ||
1949 | nst->rx_errors = (unsigned long)est->rx_bd_errors; | |
1950 | nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + | |
1951 | est->rx_fifo_overrun + | |
1952 | est->rx_overrun); | |
1953 | nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + | |
1954 | est->rx_alignment_error); | |
1955 | nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + | |
1956 | est->rx_bad_fcs); | |
1957 | nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + | |
1958 | est->rx_bd_short_event + | |
1959 | est->rx_bd_packet_too_long + | |
1960 | est->rx_bd_out_of_range + | |
1961 | est->rx_bd_in_range + | |
1962 | est->rx_runt_packet + | |
1963 | est->rx_short_event + | |
1964 | est->rx_packet_too_long + | |
1965 | est->rx_out_of_range + | |
1966 | est->rx_in_range); | |
1967 | ||
1968 | nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); | |
1969 | nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + | |
1970 | est->tx_underrun); | |
1971 | nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; | |
1972 | nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + | |
1973 | est->tx_bd_excessive_collisions + | |
1974 | est->tx_bd_late_collision + | |
1975 | est->tx_bd_multple_collisions); | |
1976 | spin_unlock_irqrestore(&dev->lock, flags); | |
1977 | return nst; | |
1978 | } | |
1979 | ||
1980 | static struct mal_commac_ops emac_commac_ops = { | |
1981 | .poll_tx = &emac_poll_tx, | |
1982 | .poll_rx = &emac_poll_rx, | |
1983 | .peek_rx = &emac_peek_rx, | |
1984 | .rxde = &emac_rxde, | |
1985 | }; | |
1986 | ||
1987 | static struct mal_commac_ops emac_commac_sg_ops = { | |
1988 | .poll_tx = &emac_poll_tx, | |
1989 | .poll_rx = &emac_poll_rx, | |
1990 | .peek_rx = &emac_peek_rx_sg, | |
1991 | .rxde = &emac_rxde, | |
1992 | }; | |
1993 | ||
1994 | /* Ethtool support */ | |
e4ccf764 PR |
1995 | static int emac_ethtool_get_link_ksettings(struct net_device *ndev, |
1996 | struct ethtool_link_ksettings *cmd) | |
1d3bb996 DG |
1997 | { |
1998 | struct emac_instance *dev = netdev_priv(ndev); | |
e4ccf764 | 1999 | u32 supported, advertising; |
1d3bb996 | 2000 | |
e4ccf764 PR |
2001 | supported = dev->phy.features; |
2002 | cmd->base.port = PORT_MII; | |
2003 | cmd->base.phy_address = dev->phy.address; | |
1d3bb996 DG |
2004 | |
2005 | mutex_lock(&dev->link_lock); | |
e4ccf764 PR |
2006 | advertising = dev->phy.advertising; |
2007 | cmd->base.autoneg = dev->phy.autoneg; | |
2008 | cmd->base.speed = dev->phy.speed; | |
2009 | cmd->base.duplex = dev->phy.duplex; | |
1d3bb996 DG |
2010 | mutex_unlock(&dev->link_lock); |
2011 | ||
e4ccf764 PR |
2012 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, |
2013 | supported); | |
2014 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, | |
2015 | advertising); | |
2016 | ||
1d3bb996 DG |
2017 | return 0; |
2018 | } | |
2019 | ||
e4ccf764 PR |
2020 | static int |
2021 | emac_ethtool_set_link_ksettings(struct net_device *ndev, | |
2022 | const struct ethtool_link_ksettings *cmd) | |
1d3bb996 DG |
2023 | { |
2024 | struct emac_instance *dev = netdev_priv(ndev); | |
2025 | u32 f = dev->phy.features; | |
e4ccf764 PR |
2026 | u32 advertising; |
2027 | ||
2028 | ethtool_convert_link_mode_to_legacy_u32(&advertising, | |
2029 | cmd->link_modes.advertising); | |
1d3bb996 DG |
2030 | |
2031 | DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL, | |
e4ccf764 | 2032 | cmd->base.autoneg, cmd->base.speed, cmd->base.duplex, advertising); |
1d3bb996 DG |
2033 | |
2034 | /* Basic sanity checks */ | |
2035 | if (dev->phy.address < 0) | |
2036 | return -EOPNOTSUPP; | |
e4ccf764 PR |
2037 | if (cmd->base.autoneg != AUTONEG_ENABLE && |
2038 | cmd->base.autoneg != AUTONEG_DISABLE) | |
1d3bb996 | 2039 | return -EINVAL; |
e4ccf764 | 2040 | if (cmd->base.autoneg == AUTONEG_ENABLE && advertising == 0) |
1d3bb996 | 2041 | return -EINVAL; |
e4ccf764 | 2042 | if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL) |
1d3bb996 DG |
2043 | return -EINVAL; |
2044 | ||
e4ccf764 PR |
2045 | if (cmd->base.autoneg == AUTONEG_DISABLE) { |
2046 | switch (cmd->base.speed) { | |
1d3bb996 | 2047 | case SPEED_10: |
e4ccf764 | 2048 | if (cmd->base.duplex == DUPLEX_HALF && |
8e95a202 | 2049 | !(f & SUPPORTED_10baseT_Half)) |
1d3bb996 | 2050 | return -EINVAL; |
e4ccf764 | 2051 | if (cmd->base.duplex == DUPLEX_FULL && |
8e95a202 | 2052 | !(f & SUPPORTED_10baseT_Full)) |
1d3bb996 DG |
2053 | return -EINVAL; |
2054 | break; | |
2055 | case SPEED_100: | |
e4ccf764 | 2056 | if (cmd->base.duplex == DUPLEX_HALF && |
8e95a202 | 2057 | !(f & SUPPORTED_100baseT_Half)) |
1d3bb996 | 2058 | return -EINVAL; |
e4ccf764 | 2059 | if (cmd->base.duplex == DUPLEX_FULL && |
8e95a202 | 2060 | !(f & SUPPORTED_100baseT_Full)) |
1d3bb996 DG |
2061 | return -EINVAL; |
2062 | break; | |
2063 | case SPEED_1000: | |
e4ccf764 | 2064 | if (cmd->base.duplex == DUPLEX_HALF && |
8e95a202 | 2065 | !(f & SUPPORTED_1000baseT_Half)) |
1d3bb996 | 2066 | return -EINVAL; |
e4ccf764 | 2067 | if (cmd->base.duplex == DUPLEX_FULL && |
8e95a202 | 2068 | !(f & SUPPORTED_1000baseT_Full)) |
1d3bb996 DG |
2069 | return -EINVAL; |
2070 | break; | |
2071 | default: | |
2072 | return -EINVAL; | |
2073 | } | |
2074 | ||
2075 | mutex_lock(&dev->link_lock); | |
e4ccf764 PR |
2076 | dev->phy.def->ops->setup_forced(&dev->phy, cmd->base.speed, |
2077 | cmd->base.duplex); | |
1d3bb996 DG |
2078 | mutex_unlock(&dev->link_lock); |
2079 | ||
2080 | } else { | |
2081 | if (!(f & SUPPORTED_Autoneg)) | |
2082 | return -EINVAL; | |
2083 | ||
2084 | mutex_lock(&dev->link_lock); | |
2085 | dev->phy.def->ops->setup_aneg(&dev->phy, | |
e4ccf764 | 2086 | (advertising & f) | |
1d3bb996 DG |
2087 | (dev->phy.advertising & |
2088 | (ADVERTISED_Pause | | |
2089 | ADVERTISED_Asym_Pause))); | |
2090 | mutex_unlock(&dev->link_lock); | |
2091 | } | |
2092 | emac_force_link_update(dev); | |
2093 | ||
2094 | return 0; | |
2095 | } | |
2096 | ||
2097 | static void emac_ethtool_get_ringparam(struct net_device *ndev, | |
2098 | struct ethtool_ringparam *rp) | |
2099 | { | |
2100 | rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; | |
2101 | rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; | |
2102 | } | |
2103 | ||
2104 | static void emac_ethtool_get_pauseparam(struct net_device *ndev, | |
2105 | struct ethtool_pauseparam *pp) | |
2106 | { | |
2107 | struct emac_instance *dev = netdev_priv(ndev); | |
2108 | ||
2109 | mutex_lock(&dev->link_lock); | |
2110 | if ((dev->phy.features & SUPPORTED_Autoneg) && | |
2111 | (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) | |
2112 | pp->autoneg = 1; | |
2113 | ||
2114 | if (dev->phy.duplex == DUPLEX_FULL) { | |
2115 | if (dev->phy.pause) | |
2116 | pp->rx_pause = pp->tx_pause = 1; | |
2117 | else if (dev->phy.asym_pause) | |
2118 | pp->tx_pause = 1; | |
2119 | } | |
2120 | mutex_unlock(&dev->link_lock); | |
2121 | } | |
2122 | ||
1d3bb996 DG |
2123 | static int emac_get_regs_len(struct emac_instance *dev) |
2124 | { | |
1d3bb996 | 2125 | return sizeof(struct emac_ethtool_regs_subhdr) + |
5369c71f | 2126 | sizeof(struct emac_regs); |
1d3bb996 DG |
2127 | } |
2128 | ||
2129 | static int emac_ethtool_get_regs_len(struct net_device *ndev) | |
2130 | { | |
2131 | struct emac_instance *dev = netdev_priv(ndev); | |
2132 | int size; | |
2133 | ||
2134 | size = sizeof(struct emac_ethtool_regs_hdr) + | |
2135 | emac_get_regs_len(dev) + mal_get_regs_len(dev->mal); | |
2136 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
2137 | size += zmii_get_regs_len(dev->zmii_dev); | |
2138 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
2139 | size += rgmii_get_regs_len(dev->rgmii_dev); | |
2140 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
2141 | size += tah_get_regs_len(dev->tah_dev); | |
2142 | ||
2143 | return size; | |
2144 | } | |
2145 | ||
2146 | static void *emac_dump_regs(struct emac_instance *dev, void *buf) | |
2147 | { | |
2148 | struct emac_ethtool_regs_subhdr *hdr = buf; | |
2149 | ||
2150 | hdr->index = dev->cell_index; | |
5369c71f IM |
2151 | if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { |
2152 | hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER; | |
2153 | } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) { | |
1d3bb996 | 2154 | hdr->version = EMAC4_ETHTOOL_REGS_VER; |
1d3bb996 DG |
2155 | } else { |
2156 | hdr->version = EMAC_ETHTOOL_REGS_VER; | |
1d3bb996 | 2157 | } |
5369c71f IM |
2158 | memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs)); |
2159 | return (void *)(hdr + 1) + sizeof(struct emac_regs); | |
1d3bb996 DG |
2160 | } |
2161 | ||
2162 | static void emac_ethtool_get_regs(struct net_device *ndev, | |
2163 | struct ethtool_regs *regs, void *buf) | |
2164 | { | |
2165 | struct emac_instance *dev = netdev_priv(ndev); | |
2166 | struct emac_ethtool_regs_hdr *hdr = buf; | |
2167 | ||
2168 | hdr->components = 0; | |
2169 | buf = hdr + 1; | |
2170 | ||
2171 | buf = mal_dump_regs(dev->mal, buf); | |
2172 | buf = emac_dump_regs(dev, buf); | |
2173 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) { | |
2174 | hdr->components |= EMAC_ETHTOOL_REGS_ZMII; | |
2175 | buf = zmii_dump_regs(dev->zmii_dev, buf); | |
2176 | } | |
2177 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { | |
2178 | hdr->components |= EMAC_ETHTOOL_REGS_RGMII; | |
2179 | buf = rgmii_dump_regs(dev->rgmii_dev, buf); | |
2180 | } | |
2181 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) { | |
2182 | hdr->components |= EMAC_ETHTOOL_REGS_TAH; | |
2183 | buf = tah_dump_regs(dev->tah_dev, buf); | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | static int emac_ethtool_nway_reset(struct net_device *ndev) | |
2188 | { | |
2189 | struct emac_instance *dev = netdev_priv(ndev); | |
2190 | int res = 0; | |
2191 | ||
2192 | DBG(dev, "nway_reset" NL); | |
2193 | ||
2194 | if (dev->phy.address < 0) | |
2195 | return -EOPNOTSUPP; | |
2196 | ||
2197 | mutex_lock(&dev->link_lock); | |
2198 | if (!dev->phy.autoneg) { | |
2199 | res = -EINVAL; | |
2200 | goto out; | |
2201 | } | |
2202 | ||
2203 | dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); | |
2204 | out: | |
2205 | mutex_unlock(&dev->link_lock); | |
2206 | emac_force_link_update(dev); | |
2207 | return res; | |
2208 | } | |
2209 | ||
15f0a394 | 2210 | static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset) |
1d3bb996 | 2211 | { |
15f0a394 BH |
2212 | if (stringset == ETH_SS_STATS) |
2213 | return EMAC_ETHTOOL_STATS_COUNT; | |
2214 | else | |
2215 | return -EINVAL; | |
1d3bb996 DG |
2216 | } |
2217 | ||
2218 | static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, | |
2219 | u8 * buf) | |
2220 | { | |
2221 | if (stringset == ETH_SS_STATS) | |
2222 | memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); | |
2223 | } | |
2224 | ||
2225 | static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, | |
2226 | struct ethtool_stats *estats, | |
2227 | u64 * tmp_stats) | |
2228 | { | |
2229 | struct emac_instance *dev = netdev_priv(ndev); | |
2230 | ||
2231 | memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); | |
2232 | tmp_stats += sizeof(dev->stats) / sizeof(u64); | |
2233 | memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); | |
2234 | } | |
2235 | ||
2236 | static void emac_ethtool_get_drvinfo(struct net_device *ndev, | |
2237 | struct ethtool_drvinfo *info) | |
2238 | { | |
2239 | struct emac_instance *dev = netdev_priv(ndev); | |
2240 | ||
7826d43f JP |
2241 | strlcpy(info->driver, "ibm_emac", sizeof(info->driver)); |
2242 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); | |
2243 | snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s", | |
2244 | dev->cell_index, dev->ofdev->dev.of_node->full_name); | |
1d3bb996 DG |
2245 | } |
2246 | ||
2247 | static const struct ethtool_ops emac_ethtool_ops = { | |
1d3bb996 DG |
2248 | .get_drvinfo = emac_ethtool_get_drvinfo, |
2249 | ||
2250 | .get_regs_len = emac_ethtool_get_regs_len, | |
2251 | .get_regs = emac_ethtool_get_regs, | |
2252 | ||
2253 | .nway_reset = emac_ethtool_nway_reset, | |
2254 | ||
2255 | .get_ringparam = emac_ethtool_get_ringparam, | |
2256 | .get_pauseparam = emac_ethtool_get_pauseparam, | |
2257 | ||
1d3bb996 | 2258 | .get_strings = emac_ethtool_get_strings, |
15f0a394 | 2259 | .get_sset_count = emac_ethtool_get_sset_count, |
1d3bb996 DG |
2260 | .get_ethtool_stats = emac_ethtool_get_ethtool_stats, |
2261 | ||
2262 | .get_link = ethtool_op_get_link, | |
e4ccf764 PR |
2263 | .get_link_ksettings = emac_ethtool_get_link_ksettings, |
2264 | .set_link_ksettings = emac_ethtool_set_link_ksettings, | |
1d3bb996 DG |
2265 | }; |
2266 | ||
2267 | static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) | |
2268 | { | |
2269 | struct emac_instance *dev = netdev_priv(ndev); | |
0fa0ee05 | 2270 | struct mii_ioctl_data *data = if_mii(rq); |
1d3bb996 DG |
2271 | |
2272 | DBG(dev, "ioctl %08x" NL, cmd); | |
2273 | ||
2274 | if (dev->phy.address < 0) | |
2275 | return -EOPNOTSUPP; | |
2276 | ||
2277 | switch (cmd) { | |
2278 | case SIOCGMIIPHY: | |
0fa0ee05 | 2279 | data->phy_id = dev->phy.address; |
1d3bb996 DG |
2280 | /* Fall through */ |
2281 | case SIOCGMIIREG: | |
0fa0ee05 BH |
2282 | data->val_out = emac_mdio_read(ndev, dev->phy.address, |
2283 | data->reg_num); | |
1d3bb996 DG |
2284 | return 0; |
2285 | ||
2286 | case SIOCSMIIREG: | |
0fa0ee05 BH |
2287 | emac_mdio_write(ndev, dev->phy.address, data->reg_num, |
2288 | data->val_in); | |
1d3bb996 DG |
2289 | return 0; |
2290 | default: | |
2291 | return -EOPNOTSUPP; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | struct emac_depentry { | |
2296 | u32 phandle; | |
2297 | struct device_node *node; | |
2dc11581 | 2298 | struct platform_device *ofdev; |
1d3bb996 DG |
2299 | void *drvdata; |
2300 | }; | |
2301 | ||
2302 | #define EMAC_DEP_MAL_IDX 0 | |
2303 | #define EMAC_DEP_ZMII_IDX 1 | |
2304 | #define EMAC_DEP_RGMII_IDX 2 | |
2305 | #define EMAC_DEP_TAH_IDX 3 | |
2306 | #define EMAC_DEP_MDIO_IDX 4 | |
2307 | #define EMAC_DEP_PREV_IDX 5 | |
2308 | #define EMAC_DEP_COUNT 6 | |
2309 | ||
fe17dc1e | 2310 | static int emac_check_deps(struct emac_instance *dev, |
1dd06ae8 | 2311 | struct emac_depentry *deps) |
1d3bb996 DG |
2312 | { |
2313 | int i, there = 0; | |
2314 | struct device_node *np; | |
2315 | ||
2316 | for (i = 0; i < EMAC_DEP_COUNT; i++) { | |
2317 | /* no dependency on that item, allright */ | |
2318 | if (deps[i].phandle == 0) { | |
2319 | there++; | |
2320 | continue; | |
2321 | } | |
2322 | /* special case for blist as the dependency might go away */ | |
2323 | if (i == EMAC_DEP_PREV_IDX) { | |
2324 | np = *(dev->blist - 1); | |
2325 | if (np == NULL) { | |
2326 | deps[i].phandle = 0; | |
2327 | there++; | |
2328 | continue; | |
2329 | } | |
2330 | if (deps[i].node == NULL) | |
2331 | deps[i].node = of_node_get(np); | |
2332 | } | |
2333 | if (deps[i].node == NULL) | |
2334 | deps[i].node = of_find_node_by_phandle(deps[i].phandle); | |
2335 | if (deps[i].node == NULL) | |
2336 | continue; | |
2337 | if (deps[i].ofdev == NULL) | |
2338 | deps[i].ofdev = of_find_device_by_node(deps[i].node); | |
2339 | if (deps[i].ofdev == NULL) | |
2340 | continue; | |
2341 | if (deps[i].drvdata == NULL) | |
bc353832 | 2342 | deps[i].drvdata = platform_get_drvdata(deps[i].ofdev); |
1d3bb996 DG |
2343 | if (deps[i].drvdata != NULL) |
2344 | there++; | |
2345 | } | |
807540ba | 2346 | return there == EMAC_DEP_COUNT; |
1d3bb996 DG |
2347 | } |
2348 | ||
2349 | static void emac_put_deps(struct emac_instance *dev) | |
2350 | { | |
5ac0fd00 ME |
2351 | of_dev_put(dev->mal_dev); |
2352 | of_dev_put(dev->zmii_dev); | |
2353 | of_dev_put(dev->rgmii_dev); | |
2354 | of_dev_put(dev->mdio_dev); | |
2355 | of_dev_put(dev->tah_dev); | |
1d3bb996 DG |
2356 | } |
2357 | ||
1dd06ae8 GKH |
2358 | static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action, |
2359 | void *data) | |
1d3bb996 DG |
2360 | { |
2361 | /* We are only intereted in device addition */ | |
2362 | if (action == BUS_NOTIFY_BOUND_DRIVER) | |
2363 | wake_up_all(&emac_probe_wait); | |
2364 | return 0; | |
2365 | } | |
2366 | ||
fe17dc1e | 2367 | static struct notifier_block emac_of_bus_notifier = { |
1d3bb996 DG |
2368 | .notifier_call = emac_of_bus_notify |
2369 | }; | |
2370 | ||
fe17dc1e | 2371 | static int emac_wait_deps(struct emac_instance *dev) |
1d3bb996 DG |
2372 | { |
2373 | struct emac_depentry deps[EMAC_DEP_COUNT]; | |
2374 | int i, err; | |
2375 | ||
2376 | memset(&deps, 0, sizeof(deps)); | |
2377 | ||
2378 | deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph; | |
2379 | deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph; | |
2380 | deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph; | |
2381 | if (dev->tah_ph) | |
2382 | deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph; | |
2383 | if (dev->mdio_ph) | |
2384 | deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph; | |
2385 | if (dev->blist && dev->blist > emac_boot_list) | |
2386 | deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu; | |
1ab1d63a | 2387 | bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier); |
1d3bb996 DG |
2388 | wait_event_timeout(emac_probe_wait, |
2389 | emac_check_deps(dev, deps), | |
2390 | EMAC_PROBE_DEP_TIMEOUT); | |
1ab1d63a | 2391 | bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier); |
1d3bb996 DG |
2392 | err = emac_check_deps(dev, deps) ? 0 : -ENODEV; |
2393 | for (i = 0; i < EMAC_DEP_COUNT; i++) { | |
5ac0fd00 | 2394 | of_node_put(deps[i].node); |
f339664c | 2395 | if (err) |
1d3bb996 DG |
2396 | of_dev_put(deps[i].ofdev); |
2397 | } | |
2398 | if (err == 0) { | |
2399 | dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev; | |
2400 | dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev; | |
2401 | dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev; | |
2402 | dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev; | |
2403 | dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev; | |
2404 | } | |
5ac0fd00 | 2405 | of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev); |
1d3bb996 DG |
2406 | return err; |
2407 | } | |
2408 | ||
fe17dc1e | 2409 | static int emac_read_uint_prop(struct device_node *np, const char *name, |
1dd06ae8 | 2410 | u32 *val, int fatal) |
1d3bb996 DG |
2411 | { |
2412 | int len; | |
2413 | const u32 *prop = of_get_property(np, name, &len); | |
2414 | if (prop == NULL || len < sizeof(u32)) { | |
2415 | if (fatal) | |
2416 | printk(KERN_ERR "%s: missing %s property\n", | |
2417 | np->full_name, name); | |
2418 | return -ENODEV; | |
2419 | } | |
2420 | *val = *prop; | |
2421 | return 0; | |
2422 | } | |
2423 | ||
a577ca6b CL |
2424 | static void emac_adjust_link(struct net_device *ndev) |
2425 | { | |
2426 | struct emac_instance *dev = netdev_priv(ndev); | |
2427 | struct phy_device *phy = dev->phy_dev; | |
2428 | ||
2429 | dev->phy.autoneg = phy->autoneg; | |
2430 | dev->phy.speed = phy->speed; | |
2431 | dev->phy.duplex = phy->duplex; | |
2432 | dev->phy.pause = phy->pause; | |
2433 | dev->phy.asym_pause = phy->asym_pause; | |
2434 | dev->phy.advertising = phy->advertising; | |
2435 | } | |
2436 | ||
2437 | static int emac_mii_bus_read(struct mii_bus *bus, int addr, int regnum) | |
2438 | { | |
2439 | int ret = emac_mdio_read(bus->priv, addr, regnum); | |
2440 | /* This is a workaround for powered down ports/phys. | |
2441 | * In the wild, this was seen on the Cisco Meraki MX60(W). | |
2442 | * This hardware disables ports as part of the handoff | |
2443 | * procedure. Accessing the ports will lead to errors | |
2444 | * (-ETIMEDOUT, -EREMOTEIO) that do more harm than good. | |
2445 | */ | |
2446 | return ret < 0 ? 0xffff : ret; | |
2447 | } | |
2448 | ||
2449 | static int emac_mii_bus_write(struct mii_bus *bus, int addr, | |
2450 | int regnum, u16 val) | |
2451 | { | |
2452 | emac_mdio_write(bus->priv, addr, regnum, val); | |
2453 | return 0; | |
2454 | } | |
2455 | ||
2456 | static int emac_mii_bus_reset(struct mii_bus *bus) | |
2457 | { | |
2458 | struct emac_instance *dev = netdev_priv(bus->priv); | |
2459 | ||
2460 | return emac_reset(dev); | |
2461 | } | |
2462 | ||
2463 | static int emac_mdio_setup_aneg(struct mii_phy *phy, u32 advertise) | |
2464 | { | |
2465 | struct net_device *ndev = phy->dev; | |
2466 | struct emac_instance *dev = netdev_priv(ndev); | |
2467 | ||
2468 | dev->phy.autoneg = AUTONEG_ENABLE; | |
2469 | dev->phy.speed = SPEED_1000; | |
2470 | dev->phy.duplex = DUPLEX_FULL; | |
2471 | dev->phy.advertising = advertise; | |
2472 | phy->autoneg = AUTONEG_ENABLE; | |
2473 | phy->speed = dev->phy.speed; | |
2474 | phy->duplex = dev->phy.duplex; | |
2475 | phy->advertising = advertise; | |
2476 | return phy_start_aneg(dev->phy_dev); | |
2477 | } | |
2478 | ||
2479 | static int emac_mdio_setup_forced(struct mii_phy *phy, int speed, int fd) | |
2480 | { | |
2481 | struct net_device *ndev = phy->dev; | |
2482 | struct emac_instance *dev = netdev_priv(ndev); | |
2483 | ||
2484 | dev->phy.autoneg = AUTONEG_DISABLE; | |
2485 | dev->phy.speed = speed; | |
2486 | dev->phy.duplex = fd; | |
2487 | phy->autoneg = AUTONEG_DISABLE; | |
2488 | phy->speed = speed; | |
2489 | phy->duplex = fd; | |
2490 | return phy_start_aneg(dev->phy_dev); | |
2491 | } | |
2492 | ||
2493 | static int emac_mdio_poll_link(struct mii_phy *phy) | |
2494 | { | |
2495 | struct net_device *ndev = phy->dev; | |
2496 | struct emac_instance *dev = netdev_priv(ndev); | |
2497 | int res; | |
2498 | ||
2499 | res = phy_read_status(dev->phy_dev); | |
2500 | if (res) { | |
2501 | dev_err(&dev->ofdev->dev, "link update failed (%d).", res); | |
2502 | return ethtool_op_get_link(ndev); | |
2503 | } | |
2504 | ||
2505 | return dev->phy_dev->link; | |
2506 | } | |
2507 | ||
2508 | static int emac_mdio_read_link(struct mii_phy *phy) | |
2509 | { | |
2510 | struct net_device *ndev = phy->dev; | |
2511 | struct emac_instance *dev = netdev_priv(ndev); | |
2512 | int res; | |
2513 | ||
2514 | res = phy_read_status(dev->phy_dev); | |
2515 | if (res) | |
2516 | return res; | |
2517 | ||
2518 | dev->phy.speed = phy->speed; | |
2519 | dev->phy.duplex = phy->duplex; | |
2520 | dev->phy.pause = phy->pause; | |
2521 | dev->phy.asym_pause = phy->asym_pause; | |
2522 | return 0; | |
2523 | } | |
2524 | ||
2525 | static int emac_mdio_init_phy(struct mii_phy *phy) | |
2526 | { | |
2527 | struct net_device *ndev = phy->dev; | |
2528 | struct emac_instance *dev = netdev_priv(ndev); | |
2529 | ||
2530 | phy_start(dev->phy_dev); | |
2531 | dev->phy.autoneg = phy->autoneg; | |
2532 | dev->phy.speed = phy->speed; | |
2533 | dev->phy.duplex = phy->duplex; | |
2534 | dev->phy.advertising = phy->advertising; | |
2535 | dev->phy.pause = phy->pause; | |
2536 | dev->phy.asym_pause = phy->asym_pause; | |
2537 | ||
2538 | return phy_init_hw(dev->phy_dev); | |
2539 | } | |
2540 | ||
2541 | static const struct mii_phy_ops emac_dt_mdio_phy_ops = { | |
2542 | .init = emac_mdio_init_phy, | |
2543 | .setup_aneg = emac_mdio_setup_aneg, | |
2544 | .setup_forced = emac_mdio_setup_forced, | |
2545 | .poll_link = emac_mdio_poll_link, | |
2546 | .read_link = emac_mdio_read_link, | |
2547 | }; | |
2548 | ||
2549 | static int emac_dt_mdio_probe(struct emac_instance *dev) | |
2550 | { | |
2551 | struct device_node *mii_np; | |
2552 | int res; | |
2553 | ||
2554 | mii_np = of_get_child_by_name(dev->ofdev->dev.of_node, "mdio"); | |
2555 | if (!mii_np) { | |
2556 | dev_err(&dev->ofdev->dev, "no mdio definition found."); | |
2557 | return -ENODEV; | |
2558 | } | |
2559 | ||
2560 | if (!of_device_is_available(mii_np)) { | |
2561 | res = -ENODEV; | |
2562 | goto put_node; | |
2563 | } | |
2564 | ||
2565 | dev->mii_bus = devm_mdiobus_alloc(&dev->ofdev->dev); | |
2566 | if (!dev->mii_bus) { | |
2567 | res = -ENOMEM; | |
2568 | goto put_node; | |
2569 | } | |
2570 | ||
2571 | dev->mii_bus->priv = dev->ndev; | |
2572 | dev->mii_bus->parent = dev->ndev->dev.parent; | |
2573 | dev->mii_bus->name = "emac_mdio"; | |
2574 | dev->mii_bus->read = &emac_mii_bus_read; | |
2575 | dev->mii_bus->write = &emac_mii_bus_write; | |
2576 | dev->mii_bus->reset = &emac_mii_bus_reset; | |
2577 | snprintf(dev->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev->ofdev->name); | |
2578 | res = of_mdiobus_register(dev->mii_bus, mii_np); | |
2579 | if (res) { | |
2580 | dev_err(&dev->ofdev->dev, "cannot register MDIO bus %s (%d)", | |
2581 | dev->mii_bus->name, res); | |
2582 | } | |
2583 | ||
2584 | put_node: | |
2585 | of_node_put(mii_np); | |
2586 | return res; | |
2587 | } | |
2588 | ||
2589 | static int emac_dt_phy_connect(struct emac_instance *dev, | |
2590 | struct device_node *phy_handle) | |
2591 | { | |
a577ca6b CL |
2592 | dev->phy.def = devm_kzalloc(&dev->ofdev->dev, sizeof(*dev->phy.def), |
2593 | GFP_KERNEL); | |
2594 | if (!dev->phy.def) | |
2595 | return -ENOMEM; | |
2596 | ||
2597 | dev->phy_dev = of_phy_connect(dev->ndev, phy_handle, &emac_adjust_link, | |
2598 | 0, dev->phy_mode); | |
2599 | if (!dev->phy_dev) { | |
2600 | dev_err(&dev->ofdev->dev, "failed to connect to PHY.\n"); | |
2601 | return -ENODEV; | |
2602 | } | |
2603 | ||
2604 | dev->phy.def->phy_id = dev->phy_dev->drv->phy_id; | |
2605 | dev->phy.def->phy_id_mask = dev->phy_dev->drv->phy_id_mask; | |
2606 | dev->phy.def->name = dev->phy_dev->drv->name; | |
2607 | dev->phy.def->ops = &emac_dt_mdio_phy_ops; | |
2608 | dev->phy.features = dev->phy_dev->supported; | |
2609 | dev->phy.address = dev->phy_dev->mdio.addr; | |
2610 | dev->phy.mode = dev->phy_dev->interface; | |
2611 | return 0; | |
2612 | } | |
2613 | ||
2614 | static int emac_dt_phy_probe(struct emac_instance *dev) | |
2615 | { | |
2616 | struct device_node *np = dev->ofdev->dev.of_node; | |
2617 | struct device_node *phy_handle; | |
b793f081 | 2618 | int res = 1; |
a577ca6b CL |
2619 | |
2620 | phy_handle = of_parse_phandle(np, "phy-handle", 0); | |
2621 | ||
2622 | if (phy_handle) { | |
2623 | res = emac_dt_mdio_probe(dev); | |
2624 | if (!res) { | |
2625 | res = emac_dt_phy_connect(dev, phy_handle); | |
2626 | if (res) | |
2627 | mdiobus_unregister(dev->mii_bus); | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | of_node_put(phy_handle); | |
2632 | return res; | |
2633 | } | |
2634 | ||
fe17dc1e | 2635 | static int emac_init_phy(struct emac_instance *dev) |
1d3bb996 | 2636 | { |
61c7a080 | 2637 | struct device_node *np = dev->ofdev->dev.of_node; |
1d3bb996 DG |
2638 | struct net_device *ndev = dev->ndev; |
2639 | u32 phy_map, adv; | |
2640 | int i; | |
2641 | ||
2642 | dev->phy.dev = ndev; | |
2643 | dev->phy.mode = dev->phy_mode; | |
2644 | ||
a577ca6b CL |
2645 | /* PHY-less configuration. */ |
2646 | if ((dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) || | |
2647 | of_phy_is_fixed_link(np)) { | |
1d3bb996 DG |
2648 | emac_reset(dev); |
2649 | ||
a577ca6b | 2650 | /* PHY-less configuration. */ |
1d3bb996 | 2651 | dev->phy.address = -1; |
9e3cb294 VG |
2652 | dev->phy.features = SUPPORTED_MII; |
2653 | if (emac_phy_supports_gige(dev->phy_mode)) | |
2654 | dev->phy.features |= SUPPORTED_1000baseT_Full; | |
2655 | else | |
2656 | dev->phy.features |= SUPPORTED_100baseT_Full; | |
1d3bb996 DG |
2657 | dev->phy.pause = 1; |
2658 | ||
a577ca6b CL |
2659 | if (of_phy_is_fixed_link(np)) { |
2660 | int res = emac_dt_mdio_probe(dev); | |
2661 | ||
2662 | if (!res) { | |
2663 | res = of_phy_register_fixed_link(np); | |
2664 | if (res) | |
2665 | mdiobus_unregister(dev->mii_bus); | |
2666 | } | |
2667 | return res; | |
2668 | } | |
1d3bb996 DG |
2669 | return 0; |
2670 | } | |
2671 | ||
2672 | mutex_lock(&emac_phy_map_lock); | |
2673 | phy_map = dev->phy_map | busy_phy_map; | |
2674 | ||
2675 | DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map); | |
2676 | ||
2677 | dev->phy.mdio_read = emac_mdio_read; | |
2678 | dev->phy.mdio_write = emac_mdio_write; | |
2679 | ||
0925ab5d VB |
2680 | /* Enable internal clock source */ |
2681 | #ifdef CONFIG_PPC_DCR_NATIVE | |
2682 | if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) | |
2683 | dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); | |
11121e30 VB |
2684 | #endif |
2685 | /* PHY clock workaround */ | |
2686 | emac_rx_clk_tx(dev); | |
2687 | ||
2688 | /* Enable internal clock source on 440GX*/ | |
2689 | #ifdef CONFIG_PPC_DCR_NATIVE | |
2690 | if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) | |
2691 | dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); | |
0925ab5d | 2692 | #endif |
1d3bb996 DG |
2693 | /* Configure EMAC with defaults so we can at least use MDIO |
2694 | * This is needed mostly for 440GX | |
2695 | */ | |
2696 | if (emac_phy_gpcs(dev->phy.mode)) { | |
2697 | /* XXX | |
2698 | * Make GPCS PHY address equal to EMAC index. | |
2699 | * We probably should take into account busy_phy_map | |
2700 | * and/or phy_map here. | |
2701 | * | |
2702 | * Note that the busy_phy_map is currently global | |
2703 | * while it should probably be per-ASIC... | |
2704 | */ | |
9e3cb294 VG |
2705 | dev->phy.gpcs_address = dev->gpcs_address; |
2706 | if (dev->phy.gpcs_address == 0xffffffff) | |
2707 | dev->phy.address = dev->cell_index; | |
1d3bb996 DG |
2708 | } |
2709 | ||
2710 | emac_configure(dev); | |
2711 | ||
a577ca6b CL |
2712 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { |
2713 | int res = emac_dt_phy_probe(dev); | |
2714 | ||
b793f081 CL |
2715 | switch (res) { |
2716 | case 1: | |
2717 | /* No phy-handle property configured. | |
2718 | * Continue with the existing phy probe | |
2719 | * and setup code. | |
2720 | */ | |
2721 | break; | |
2722 | ||
2723 | case 0: | |
2724 | mutex_unlock(&emac_phy_map_lock); | |
a577ca6b CL |
2725 | goto init_phy; |
2726 | ||
b793f081 CL |
2727 | default: |
2728 | mutex_unlock(&emac_phy_map_lock); | |
2729 | dev_err(&dev->ofdev->dev, "failed to attach dt phy (%d).\n", | |
2730 | res); | |
2731 | return res; | |
2732 | } | |
a577ca6b CL |
2733 | } |
2734 | ||
1d3bb996 DG |
2735 | if (dev->phy_address != 0xffffffff) |
2736 | phy_map = ~(1 << dev->phy_address); | |
2737 | ||
2738 | for (i = 0; i < 0x20; phy_map >>= 1, ++i) | |
2739 | if (!(phy_map & 1)) { | |
2740 | int r; | |
2741 | busy_phy_map |= 1 << i; | |
2742 | ||
2743 | /* Quick check if there is a PHY at the address */ | |
2744 | r = emac_mdio_read(dev->ndev, i, MII_BMCR); | |
2745 | if (r == 0xffff || r < 0) | |
2746 | continue; | |
2747 | if (!emac_mii_phy_probe(&dev->phy, i)) | |
2748 | break; | |
2749 | } | |
0925ab5d VB |
2750 | |
2751 | /* Enable external clock source */ | |
2752 | #ifdef CONFIG_PPC_DCR_NATIVE | |
2753 | if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) | |
2754 | dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0); | |
2755 | #endif | |
1d3bb996 DG |
2756 | mutex_unlock(&emac_phy_map_lock); |
2757 | if (i == 0x20) { | |
2758 | printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name); | |
2759 | return -ENXIO; | |
2760 | } | |
2761 | ||
a577ca6b | 2762 | init_phy: |
1d3bb996 DG |
2763 | /* Init PHY */ |
2764 | if (dev->phy.def->ops->init) | |
2765 | dev->phy.def->ops->init(&dev->phy); | |
2766 | ||
2767 | /* Disable any PHY features not supported by the platform */ | |
2768 | dev->phy.def->features &= ~dev->phy_feat_exc; | |
ae5d3372 | 2769 | dev->phy.features &= ~dev->phy_feat_exc; |
1d3bb996 DG |
2770 | |
2771 | /* Setup initial link parameters */ | |
2772 | if (dev->phy.features & SUPPORTED_Autoneg) { | |
2773 | adv = dev->phy.features; | |
2774 | if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x)) | |
2775 | adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; | |
2776 | /* Restart autonegotiation */ | |
2777 | dev->phy.def->ops->setup_aneg(&dev->phy, adv); | |
2778 | } else { | |
2779 | u32 f = dev->phy.def->features; | |
2780 | int speed = SPEED_10, fd = DUPLEX_HALF; | |
2781 | ||
2782 | /* Select highest supported speed/duplex */ | |
2783 | if (f & SUPPORTED_1000baseT_Full) { | |
2784 | speed = SPEED_1000; | |
2785 | fd = DUPLEX_FULL; | |
2786 | } else if (f & SUPPORTED_1000baseT_Half) | |
2787 | speed = SPEED_1000; | |
2788 | else if (f & SUPPORTED_100baseT_Full) { | |
2789 | speed = SPEED_100; | |
2790 | fd = DUPLEX_FULL; | |
2791 | } else if (f & SUPPORTED_100baseT_Half) | |
2792 | speed = SPEED_100; | |
2793 | else if (f & SUPPORTED_10baseT_Full) | |
2794 | fd = DUPLEX_FULL; | |
2795 | ||
2796 | /* Force link parameters */ | |
2797 | dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); | |
2798 | } | |
2799 | return 0; | |
2800 | } | |
2801 | ||
fe17dc1e | 2802 | static int emac_init_config(struct emac_instance *dev) |
1d3bb996 | 2803 | { |
61c7a080 | 2804 | struct device_node *np = dev->ofdev->dev.of_node; |
1d3bb996 | 2805 | const void *p; |
1d3bb996 DG |
2806 | |
2807 | /* Read config from device-tree */ | |
2808 | if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1)) | |
2809 | return -ENXIO; | |
2810 | if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1)) | |
2811 | return -ENXIO; | |
2812 | if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1)) | |
2813 | return -ENXIO; | |
2814 | if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1)) | |
2815 | return -ENXIO; | |
2816 | if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0)) | |
3d5d96ac | 2817 | dev->max_mtu = ETH_DATA_LEN; |
1d3bb996 DG |
2818 | if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0)) |
2819 | dev->rx_fifo_size = 2048; | |
2820 | if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0)) | |
2821 | dev->tx_fifo_size = 2048; | |
2822 | if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0)) | |
2823 | dev->rx_fifo_size_gige = dev->rx_fifo_size; | |
2824 | if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0)) | |
2825 | dev->tx_fifo_size_gige = dev->tx_fifo_size; | |
2826 | if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0)) | |
2827 | dev->phy_address = 0xffffffff; | |
2828 | if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0)) | |
2829 | dev->phy_map = 0xffffffff; | |
9e3cb294 VG |
2830 | if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0)) |
2831 | dev->gpcs_address = 0xffffffff; | |
1d3bb996 DG |
2832 | if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1)) |
2833 | return -ENXIO; | |
2834 | if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0)) | |
2835 | dev->tah_ph = 0; | |
2836 | if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0)) | |
63b6cad7 | 2837 | dev->tah_port = 0; |
1d3bb996 DG |
2838 | if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0)) |
2839 | dev->mdio_ph = 0; | |
2840 | if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0)) | |
a419aef8 | 2841 | dev->zmii_ph = 0; |
1d3bb996 | 2842 | if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0)) |
a419aef8 | 2843 | dev->zmii_port = 0xffffffff; |
1d3bb996 | 2844 | if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0)) |
a419aef8 | 2845 | dev->rgmii_ph = 0; |
1d3bb996 | 2846 | if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0)) |
a419aef8 | 2847 | dev->rgmii_port = 0xffffffff; |
1d3bb996 DG |
2848 | if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0)) |
2849 | dev->fifo_entry_size = 16; | |
2850 | if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0)) | |
2851 | dev->mal_burst_size = 256; | |
2852 | ||
2853 | /* PHY mode needs some decoding */ | |
4157ef1b SG |
2854 | dev->phy_mode = of_get_phy_mode(np); |
2855 | if (dev->phy_mode < 0) | |
2856 | dev->phy_mode = PHY_MODE_NA; | |
1d3bb996 DG |
2857 | |
2858 | /* Check EMAC version */ | |
05781ccd GE |
2859 | if (of_device_is_compatible(np, "ibm,emac4sync")) { |
2860 | dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC); | |
9e3cb294 VG |
2861 | if (of_device_is_compatible(np, "ibm,emac-460ex") || |
2862 | of_device_is_compatible(np, "ibm,emac-460gt")) | |
2863 | dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX; | |
9616a755 BH |
2864 | if (of_device_is_compatible(np, "ibm,emac-405ex") || |
2865 | of_device_is_compatible(np, "ibm,emac-405exr")) | |
2866 | dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; | |
ae5d3372 DD |
2867 | if (of_device_is_compatible(np, "ibm,emac-apm821xx")) { |
2868 | dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE | | |
2869 | EMAC_FTR_APM821XX_NO_HALF_DUPLEX | | |
2870 | EMAC_FTR_460EX_PHY_CLK_FIX); | |
2871 | } | |
05781ccd | 2872 | } else if (of_device_is_compatible(np, "ibm,emac4")) { |
1d3bb996 | 2873 | dev->features |= EMAC_FTR_EMAC4; |
0925ab5d VB |
2874 | if (of_device_is_compatible(np, "ibm,emac-440gx")) |
2875 | dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX; | |
11121e30 VB |
2876 | } else { |
2877 | if (of_device_is_compatible(np, "ibm,emac-440ep") || | |
2878 | of_device_is_compatible(np, "ibm,emac-440gr")) | |
2879 | dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; | |
1ff0fcfc | 2880 | if (of_device_is_compatible(np, "ibm,emac-405ez")) { |
3b3bceef | 2881 | #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL |
b68d185a | 2882 | dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x; |
1ff0fcfc JB |
2883 | #else |
2884 | printk(KERN_ERR "%s: Flow control not disabled!\n", | |
2885 | np->full_name); | |
2886 | return -ENXIO; | |
2887 | #endif | |
2888 | } | |
2889 | ||
0925ab5d | 2890 | } |
bff713b5 BH |
2891 | |
2892 | /* Fixup some feature bits based on the device tree */ | |
2893 | if (of_get_property(np, "has-inverted-stacr-oc", NULL)) | |
1d3bb996 | 2894 | dev->features |= EMAC_FTR_STACR_OC_INVERT; |
bff713b5 BH |
2895 | if (of_get_property(np, "has-new-stacr-staopc", NULL)) |
2896 | dev->features |= EMAC_FTR_HAS_NEW_STACR; | |
1d3bb996 | 2897 | |
bff713b5 BH |
2898 | /* CAB lacks the appropriate properties */ |
2899 | if (of_device_is_compatible(np, "ibm,emac-axon")) | |
2900 | dev->features |= EMAC_FTR_HAS_NEW_STACR | | |
2901 | EMAC_FTR_STACR_OC_INVERT; | |
2902 | ||
2903 | /* Enable TAH/ZMII/RGMII features as found */ | |
1d3bb996 | 2904 | if (dev->tah_ph != 0) { |
3b3bceef | 2905 | #ifdef CONFIG_IBM_EMAC_TAH |
1d3bb996 DG |
2906 | dev->features |= EMAC_FTR_HAS_TAH; |
2907 | #else | |
2908 | printk(KERN_ERR "%s: TAH support not enabled !\n", | |
2909 | np->full_name); | |
2910 | return -ENXIO; | |
2911 | #endif | |
2912 | } | |
2913 | ||
2914 | if (dev->zmii_ph != 0) { | |
3b3bceef | 2915 | #ifdef CONFIG_IBM_EMAC_ZMII |
1d3bb996 DG |
2916 | dev->features |= EMAC_FTR_HAS_ZMII; |
2917 | #else | |
2918 | printk(KERN_ERR "%s: ZMII support not enabled !\n", | |
2919 | np->full_name); | |
2920 | return -ENXIO; | |
2921 | #endif | |
2922 | } | |
2923 | ||
2924 | if (dev->rgmii_ph != 0) { | |
3b3bceef | 2925 | #ifdef CONFIG_IBM_EMAC_RGMII |
1d3bb996 DG |
2926 | dev->features |= EMAC_FTR_HAS_RGMII; |
2927 | #else | |
2928 | printk(KERN_ERR "%s: RGMII support not enabled !\n", | |
2929 | np->full_name); | |
2930 | return -ENXIO; | |
2931 | #endif | |
2932 | } | |
2933 | ||
2934 | /* Read MAC-address */ | |
2935 | p = of_get_property(np, "local-mac-address", NULL); | |
2936 | if (p == NULL) { | |
2937 | printk(KERN_ERR "%s: Can't find local-mac-address property\n", | |
2938 | np->full_name); | |
2939 | return -ENXIO; | |
2940 | } | |
d458cdf7 | 2941 | memcpy(dev->ndev->dev_addr, p, ETH_ALEN); |
1d3bb996 | 2942 | |
05781ccd GE |
2943 | /* IAHT and GAHT filter parameterization */ |
2944 | if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { | |
2945 | dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT; | |
2946 | dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT; | |
2947 | } else { | |
2948 | dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT; | |
2949 | dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT; | |
2950 | } | |
2951 | ||
1d3bb996 DG |
2952 | DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE); |
2953 | DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige); | |
2954 | DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige); | |
2955 | DBG(dev, "max_mtu : %d\n", dev->max_mtu); | |
2956 | DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq); | |
2957 | ||
2958 | return 0; | |
2959 | } | |
2960 | ||
15efc02b AB |
2961 | static const struct net_device_ops emac_netdev_ops = { |
2962 | .ndo_open = emac_open, | |
2963 | .ndo_stop = emac_close, | |
2964 | .ndo_get_stats = emac_stats, | |
afc4b13d | 2965 | .ndo_set_rx_mode = emac_set_multicast_list, |
15efc02b AB |
2966 | .ndo_do_ioctl = emac_ioctl, |
2967 | .ndo_tx_timeout = emac_tx_timeout, | |
2968 | .ndo_validate_addr = eth_validate_addr, | |
01afd972 | 2969 | .ndo_set_mac_address = emac_set_mac_address, |
15efc02b | 2970 | .ndo_start_xmit = emac_start_xmit, |
15efc02b AB |
2971 | }; |
2972 | ||
2973 | static const struct net_device_ops emac_gige_netdev_ops = { | |
2974 | .ndo_open = emac_open, | |
2975 | .ndo_stop = emac_close, | |
2976 | .ndo_get_stats = emac_stats, | |
afc4b13d | 2977 | .ndo_set_rx_mode = emac_set_multicast_list, |
15efc02b AB |
2978 | .ndo_do_ioctl = emac_ioctl, |
2979 | .ndo_tx_timeout = emac_tx_timeout, | |
2980 | .ndo_validate_addr = eth_validate_addr, | |
01afd972 | 2981 | .ndo_set_mac_address = emac_set_mac_address, |
15efc02b AB |
2982 | .ndo_start_xmit = emac_start_xmit_sg, |
2983 | .ndo_change_mtu = emac_change_mtu, | |
2984 | }; | |
2985 | ||
fe17dc1e | 2986 | static int emac_probe(struct platform_device *ofdev) |
1d3bb996 DG |
2987 | { |
2988 | struct net_device *ndev; | |
2989 | struct emac_instance *dev; | |
61c7a080 | 2990 | struct device_node *np = ofdev->dev.of_node; |
1d3bb996 DG |
2991 | struct device_node **blist = NULL; |
2992 | int err, i; | |
2993 | ||
be63c09a JB |
2994 | /* Skip unused/unwired EMACS. We leave the check for an unused |
2995 | * property here for now, but new flat device trees should set a | |
2996 | * status property to "disabled" instead. | |
2997 | */ | |
2998 | if (of_get_property(np, "unused", NULL) || !of_device_is_available(np)) | |
3d722562 HB |
2999 | return -ENODEV; |
3000 | ||
1d3bb996 DG |
3001 | /* Find ourselves in the bootlist if we are there */ |
3002 | for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) | |
3003 | if (emac_boot_list[i] == np) | |
3004 | blist = &emac_boot_list[i]; | |
3005 | ||
3006 | /* Allocate our net_device structure */ | |
3007 | err = -ENOMEM; | |
3008 | ndev = alloc_etherdev(sizeof(struct emac_instance)); | |
41de8d4c | 3009 | if (!ndev) |
1d3bb996 | 3010 | goto err_gone; |
41de8d4c | 3011 | |
1d3bb996 DG |
3012 | dev = netdev_priv(ndev); |
3013 | dev->ndev = ndev; | |
3014 | dev->ofdev = ofdev; | |
3015 | dev->blist = blist; | |
1d3bb996 DG |
3016 | SET_NETDEV_DEV(ndev, &ofdev->dev); |
3017 | ||
3018 | /* Initialize some embedded data structures */ | |
3019 | mutex_init(&dev->mdio_lock); | |
3020 | mutex_init(&dev->link_lock); | |
3021 | spin_lock_init(&dev->lock); | |
3022 | INIT_WORK(&dev->reset_work, emac_reset_work); | |
3023 | ||
3024 | /* Init various config data based on device-tree */ | |
3025 | err = emac_init_config(dev); | |
3026 | if (err != 0) | |
3027 | goto err_free; | |
3028 | ||
3029 | /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */ | |
3030 | dev->emac_irq = irq_of_parse_and_map(np, 0); | |
3031 | dev->wol_irq = irq_of_parse_and_map(np, 1); | |
99c1790e | 3032 | if (!dev->emac_irq) { |
1d3bb996 DG |
3033 | printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name); |
3034 | goto err_free; | |
3035 | } | |
3036 | ndev->irq = dev->emac_irq; | |
3037 | ||
3038 | /* Map EMAC regs */ | |
3039 | if (of_address_to_resource(np, 0, &dev->rsrc_regs)) { | |
3040 | printk(KERN_ERR "%s: Can't get registers address\n", | |
3041 | np->full_name); | |
3042 | goto err_irq_unmap; | |
3043 | } | |
3044 | // TODO : request_mem_region | |
05781ccd | 3045 | dev->emacp = ioremap(dev->rsrc_regs.start, |
28f65c11 | 3046 | resource_size(&dev->rsrc_regs)); |
1d3bb996 DG |
3047 | if (dev->emacp == NULL) { |
3048 | printk(KERN_ERR "%s: Can't map device registers!\n", | |
3049 | np->full_name); | |
3050 | err = -ENOMEM; | |
3051 | goto err_irq_unmap; | |
3052 | } | |
3053 | ||
3054 | /* Wait for dependent devices */ | |
3055 | err = emac_wait_deps(dev); | |
3056 | if (err) { | |
3057 | printk(KERN_ERR | |
3058 | "%s: Timeout waiting for dependent devices\n", | |
3059 | np->full_name); | |
3060 | /* display more info about what's missing ? */ | |
3061 | goto err_reg_unmap; | |
3062 | } | |
bc353832 | 3063 | dev->mal = platform_get_drvdata(dev->mal_dev); |
1d3bb996 | 3064 | if (dev->mdio_dev != NULL) |
bc353832 | 3065 | dev->mdio_instance = platform_get_drvdata(dev->mdio_dev); |
1d3bb996 DG |
3066 | |
3067 | /* Register with MAL */ | |
3068 | dev->commac.ops = &emac_commac_ops; | |
3069 | dev->commac.dev = dev; | |
3070 | dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan); | |
3071 | dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan); | |
3072 | err = mal_register_commac(dev->mal, &dev->commac); | |
3073 | if (err) { | |
3074 | printk(KERN_ERR "%s: failed to register with mal %s!\n", | |
61c7a080 | 3075 | np->full_name, dev->mal_dev->dev.of_node->full_name); |
1d3bb996 DG |
3076 | goto err_rel_deps; |
3077 | } | |
3078 | dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); | |
3079 | dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); | |
3080 | ||
3081 | /* Get pointers to BD rings */ | |
3082 | dev->tx_desc = | |
3083 | dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan); | |
3084 | dev->rx_desc = | |
3085 | dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan); | |
3086 | ||
3087 | DBG(dev, "tx_desc %p" NL, dev->tx_desc); | |
3088 | DBG(dev, "rx_desc %p" NL, dev->rx_desc); | |
3089 | ||
3090 | /* Clean rings */ | |
3091 | memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); | |
3092 | memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); | |
ab9b30cc SN |
3093 | memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *)); |
3094 | memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *)); | |
1d3bb996 DG |
3095 | |
3096 | /* Attach to ZMII, if needed */ | |
3097 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) && | |
3098 | (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0) | |
3099 | goto err_unreg_commac; | |
3100 | ||
3101 | /* Attach to RGMII, if needed */ | |
3102 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) && | |
3103 | (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0) | |
3104 | goto err_detach_zmii; | |
3105 | ||
3106 | /* Attach to TAH, if needed */ | |
3107 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && | |
3108 | (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0) | |
3109 | goto err_detach_rgmii; | |
3110 | ||
3111 | /* Set some link defaults before we can find out real parameters */ | |
3112 | dev->phy.speed = SPEED_100; | |
3113 | dev->phy.duplex = DUPLEX_FULL; | |
3114 | dev->phy.autoneg = AUTONEG_DISABLE; | |
3115 | dev->phy.pause = dev->phy.asym_pause = 0; | |
3116 | dev->stop_timeout = STOP_TIMEOUT_100; | |
3117 | INIT_DELAYED_WORK(&dev->link_work, emac_link_timer); | |
3118 | ||
ae5d3372 DD |
3119 | /* Some SoCs like APM821xx does not support Half Duplex mode. */ |
3120 | if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) { | |
3121 | dev->phy_feat_exc = (SUPPORTED_1000baseT_Half | | |
3122 | SUPPORTED_100baseT_Half | | |
3123 | SUPPORTED_10baseT_Half); | |
3124 | } | |
3125 | ||
1d3bb996 DG |
3126 | /* Find PHY if any */ |
3127 | err = emac_init_phy(dev); | |
3128 | if (err != 0) | |
3129 | goto err_detach_tah; | |
3130 | ||
5e4011e2 MM |
3131 | if (dev->tah_dev) { |
3132 | ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG; | |
3133 | ndev->features |= ndev->hw_features | NETIF_F_RXCSUM; | |
3134 | } | |
1d3bb996 | 3135 | ndev->watchdog_timeo = 5 * HZ; |
1d3bb996 | 3136 | if (emac_phy_supports_gige(dev->phy_mode)) { |
15efc02b | 3137 | ndev->netdev_ops = &emac_gige_netdev_ops; |
1d3bb996 | 3138 | dev->commac.ops = &emac_commac_sg_ops; |
15efc02b AB |
3139 | } else |
3140 | ndev->netdev_ops = &emac_netdev_ops; | |
7ad24ea4 | 3141 | ndev->ethtool_ops = &emac_ethtool_ops; |
1d3bb996 | 3142 | |
3d5d96ac JW |
3143 | /* MTU range: 46 - 1500 or whatever is in OF */ |
3144 | ndev->min_mtu = EMAC_MIN_MTU; | |
3145 | ndev->max_mtu = dev->max_mtu; | |
3146 | ||
1d3bb996 | 3147 | netif_carrier_off(ndev); |
1d3bb996 DG |
3148 | |
3149 | err = register_netdev(ndev); | |
3150 | if (err) { | |
3151 | printk(KERN_ERR "%s: failed to register net device (%d)!\n", | |
3152 | np->full_name, err); | |
3153 | goto err_detach_tah; | |
3154 | } | |
3155 | ||
3156 | /* Set our drvdata last as we don't want them visible until we are | |
3157 | * fully initialized | |
3158 | */ | |
3159 | wmb(); | |
bc353832 | 3160 | platform_set_drvdata(ofdev, dev); |
1d3bb996 DG |
3161 | |
3162 | /* There's a new kid in town ! Let's tell everybody */ | |
3163 | wake_up_all(&emac_probe_wait); | |
3164 | ||
3165 | ||
7c510e4b JB |
3166 | printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n", |
3167 | ndev->name, dev->cell_index, np->full_name, ndev->dev_addr); | |
1d3bb996 | 3168 | |
9e3cb294 VG |
3169 | if (dev->phy_mode == PHY_MODE_SGMII) |
3170 | printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name); | |
3171 | ||
1d3bb996 DG |
3172 | if (dev->phy.address >= 0) |
3173 | printk("%s: found %s PHY (0x%02x)\n", ndev->name, | |
3174 | dev->phy.def->name, dev->phy.address); | |
3175 | ||
3176 | emac_dbg_register(dev); | |
3177 | ||
3178 | /* Life is good */ | |
3179 | return 0; | |
3180 | ||
3181 | /* I have a bad feeling about this ... */ | |
3182 | ||
3183 | err_detach_tah: | |
3184 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) | |
3185 | tah_detach(dev->tah_dev, dev->tah_port); | |
3186 | err_detach_rgmii: | |
3187 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
3188 | rgmii_detach(dev->rgmii_dev, dev->rgmii_port); | |
3189 | err_detach_zmii: | |
3190 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
3191 | zmii_detach(dev->zmii_dev, dev->zmii_port); | |
3192 | err_unreg_commac: | |
3193 | mal_unregister_commac(dev->mal, &dev->commac); | |
3194 | err_rel_deps: | |
3195 | emac_put_deps(dev); | |
3196 | err_reg_unmap: | |
3197 | iounmap(dev->emacp); | |
3198 | err_irq_unmap: | |
99c1790e | 3199 | if (dev->wol_irq) |
1d3bb996 | 3200 | irq_dispose_mapping(dev->wol_irq); |
99c1790e | 3201 | if (dev->emac_irq) |
1d3bb996 DG |
3202 | irq_dispose_mapping(dev->emac_irq); |
3203 | err_free: | |
52933f05 | 3204 | free_netdev(ndev); |
1d3bb996 DG |
3205 | err_gone: |
3206 | /* if we were on the bootlist, remove us as we won't show up and | |
3207 | * wake up all waiters to notify them in case they were waiting | |
3208 | * on us | |
3209 | */ | |
3210 | if (blist) { | |
3211 | *blist = NULL; | |
3212 | wake_up_all(&emac_probe_wait); | |
3213 | } | |
3214 | return err; | |
3215 | } | |
3216 | ||
fe17dc1e | 3217 | static int emac_remove(struct platform_device *ofdev) |
1d3bb996 | 3218 | { |
bc353832 | 3219 | struct emac_instance *dev = platform_get_drvdata(ofdev); |
1d3bb996 DG |
3220 | |
3221 | DBG(dev, "remove" NL); | |
3222 | ||
1d3bb996 DG |
3223 | unregister_netdev(dev->ndev); |
3224 | ||
23f333a2 | 3225 | cancel_work_sync(&dev->reset_work); |
61dbcece | 3226 | |
1d3bb996 DG |
3227 | if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) |
3228 | tah_detach(dev->tah_dev, dev->tah_port); | |
3229 | if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) | |
3230 | rgmii_detach(dev->rgmii_dev, dev->rgmii_port); | |
3231 | if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) | |
3232 | zmii_detach(dev->zmii_dev, dev->zmii_port); | |
3233 | ||
a577ca6b CL |
3234 | if (dev->phy_dev) |
3235 | phy_disconnect(dev->phy_dev); | |
3236 | ||
3237 | if (dev->mii_bus) | |
3238 | mdiobus_unregister(dev->mii_bus); | |
3239 | ||
d6f14483 WG |
3240 | busy_phy_map &= ~(1 << dev->phy.address); |
3241 | DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map); | |
3242 | ||
1d3bb996 DG |
3243 | mal_unregister_commac(dev->mal, &dev->commac); |
3244 | emac_put_deps(dev); | |
3245 | ||
3246 | emac_dbg_unregister(dev); | |
3247 | iounmap(dev->emacp); | |
3248 | ||
99c1790e | 3249 | if (dev->wol_irq) |
1d3bb996 | 3250 | irq_dispose_mapping(dev->wol_irq); |
99c1790e | 3251 | if (dev->emac_irq) |
1d3bb996 DG |
3252 | irq_dispose_mapping(dev->emac_irq); |
3253 | ||
52933f05 | 3254 | free_netdev(dev->ndev); |
1d3bb996 DG |
3255 | |
3256 | return 0; | |
3257 | } | |
3258 | ||
3259 | /* XXX Features in here should be replaced by properties... */ | |
47b61667 | 3260 | static const struct of_device_id emac_match[] = |
1d3bb996 DG |
3261 | { |
3262 | { | |
3263 | .type = "network", | |
3264 | .compatible = "ibm,emac", | |
3265 | }, | |
3266 | { | |
3267 | .type = "network", | |
3268 | .compatible = "ibm,emac4", | |
3269 | }, | |
05781ccd GE |
3270 | { |
3271 | .type = "network", | |
3272 | .compatible = "ibm,emac4sync", | |
3273 | }, | |
1d3bb996 DG |
3274 | {}, |
3275 | }; | |
e72701ac | 3276 | MODULE_DEVICE_TABLE(of, emac_match); |
1d3bb996 | 3277 | |
74888760 | 3278 | static struct platform_driver emac_driver = { |
4018294b GL |
3279 | .driver = { |
3280 | .name = "emac", | |
4018294b GL |
3281 | .of_match_table = emac_match, |
3282 | }, | |
1d3bb996 DG |
3283 | .probe = emac_probe, |
3284 | .remove = emac_remove, | |
3285 | }; | |
3286 | ||
3287 | static void __init emac_make_bootlist(void) | |
3288 | { | |
3289 | struct device_node *np = NULL; | |
c9003ec8 | 3290 | int j, max, i = 0; |
1d3bb996 DG |
3291 | int cell_indices[EMAC_BOOT_LIST_SIZE]; |
3292 | ||
3293 | /* Collect EMACs */ | |
3294 | while((np = of_find_all_nodes(np)) != NULL) { | |
3295 | const u32 *idx; | |
3296 | ||
3297 | if (of_match_node(emac_match, np) == NULL) | |
3298 | continue; | |
3299 | if (of_get_property(np, "unused", NULL)) | |
3300 | continue; | |
3301 | idx = of_get_property(np, "cell-index", NULL); | |
3302 | if (idx == NULL) | |
3303 | continue; | |
3304 | cell_indices[i] = *idx; | |
3305 | emac_boot_list[i++] = of_node_get(np); | |
3306 | if (i >= EMAC_BOOT_LIST_SIZE) { | |
3307 | of_node_put(np); | |
3308 | break; | |
3309 | } | |
3310 | } | |
3311 | max = i; | |
3312 | ||
3313 | /* Bubble sort them (doh, what a creative algorithm :-) */ | |
3314 | for (i = 0; max > 1 && (i < (max - 1)); i++) | |
3315 | for (j = i; j < max; j++) { | |
3316 | if (cell_indices[i] > cell_indices[j]) { | |
c9003ec8 FF |
3317 | swap(emac_boot_list[i], emac_boot_list[j]); |
3318 | swap(cell_indices[i], cell_indices[j]); | |
1d3bb996 DG |
3319 | } |
3320 | } | |
3321 | } | |
3322 | ||
3323 | static int __init emac_init(void) | |
3324 | { | |
3325 | int rc; | |
3326 | ||
3327 | printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); | |
3328 | ||
3329 | /* Init debug stuff */ | |
3330 | emac_init_debug(); | |
3331 | ||
3332 | /* Build EMAC boot list */ | |
3333 | emac_make_bootlist(); | |
3334 | ||
3335 | /* Init submodules */ | |
3336 | rc = mal_init(); | |
3337 | if (rc) | |
3338 | goto err; | |
3339 | rc = zmii_init(); | |
3340 | if (rc) | |
3341 | goto err_mal; | |
3342 | rc = rgmii_init(); | |
3343 | if (rc) | |
3344 | goto err_zmii; | |
3345 | rc = tah_init(); | |
3346 | if (rc) | |
3347 | goto err_rgmii; | |
74888760 | 3348 | rc = platform_driver_register(&emac_driver); |
1d3bb996 DG |
3349 | if (rc) |
3350 | goto err_tah; | |
3351 | ||
3352 | return 0; | |
3353 | ||
3354 | err_tah: | |
3355 | tah_exit(); | |
3356 | err_rgmii: | |
3357 | rgmii_exit(); | |
3358 | err_zmii: | |
3359 | zmii_exit(); | |
3360 | err_mal: | |
3361 | mal_exit(); | |
3362 | err: | |
3363 | return rc; | |
3364 | } | |
3365 | ||
3366 | static void __exit emac_exit(void) | |
3367 | { | |
3368 | int i; | |
3369 | ||
74888760 | 3370 | platform_driver_unregister(&emac_driver); |
1d3bb996 DG |
3371 | |
3372 | tah_exit(); | |
3373 | rgmii_exit(); | |
3374 | zmii_exit(); | |
3375 | mal_exit(); | |
3376 | emac_fini_debug(); | |
3377 | ||
3378 | /* Destroy EMAC boot list */ | |
3379 | for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) | |
5ac0fd00 | 3380 | of_node_put(emac_boot_list[i]); |
1d3bb996 DG |
3381 | } |
3382 | ||
3383 | module_init(emac_init); | |
3384 | module_exit(emac_exit); |