Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
37448f7d | 2 | * drivers/net/ibm_emac/ibm_emac_core.c |
1da177e4 | 3 | * |
37448f7d | 4 | * Driver for PowerPC 4xx on-chip ethernet controller. |
1da177e4 | 5 | * |
37448f7d ES |
6 | * Copyright (c) 2004, 2005 Zultys Technologies. |
7 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
1da177e4 | 8 | * |
37448f7d ES |
9 | * Based on original work by |
10 | * Matt Porter <mporter@kernel.crashing.org> | |
11 | * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
1da177e4 LT |
12 | * Armin Kuster <akuster@mvista.com> |
13 | * Johnnie Peters <jpeters@mvista.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
37448f7d | 19 | * |
1da177e4 | 20 | */ |
37448f7d | 21 | |
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/kernel.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/string.h> | |
1da177e4 | 26 | #include <linux/errno.h> |
1da177e4 LT |
27 | #include <linux/interrupt.h> |
28 | #include <linux/delay.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/types.h> | |
37448f7d ES |
31 | #include <linux/pci.h> |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/crc32.h> | |
1da177e4 LT |
36 | #include <linux/ethtool.h> |
37 | #include <linux/mii.h> | |
38 | #include <linux/bitops.h> | |
39 | ||
40 | #include <asm/processor.h> | |
41 | #include <asm/io.h> | |
42 | #include <asm/dma.h> | |
1da177e4 LT |
43 | #include <asm/uaccess.h> |
44 | #include <asm/ocp.h> | |
45 | ||
1da177e4 | 46 | #include "ibm_emac_core.h" |
37448f7d | 47 | #include "ibm_emac_debug.h" |
1da177e4 LT |
48 | |
49 | /* | |
37448f7d ES |
50 | * Lack of dma_unmap_???? calls is intentional. |
51 | * | |
52 | * API-correct usage requires additional support state information to be | |
53 | * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to | |
54 | * EMAC design (e.g. TX buffer passed from network stack can be split into | |
55 | * several BDs, dma_map_single/dma_map_page can be used to map particular BD), | |
56 | * maintaining such information will add additional overhead. | |
57 | * Current DMA API implementation for 4xx processors only ensures cache coherency | |
58 | * and dma_unmap_???? routines are empty and are likely to stay this way. | |
59 | * I decided to omit dma_unmap_??? calls because I don't want to add additional | |
60 | * complexity just for the sake of following some abstract API, when it doesn't | |
61 | * add any real benefit to the driver. I understand that this decision maybe | |
62 | * controversial, but I really tried to make code API-correct and efficient | |
63 | * at the same time and didn't come up with code I liked :(. --ebs | |
1da177e4 | 64 | */ |
1da177e4 | 65 | |
37448f7d | 66 | #define DRV_NAME "emac" |
8169bd91 | 67 | #define DRV_VERSION "3.54" |
37448f7d ES |
68 | #define DRV_DESC "PPC 4xx OCP EMAC driver" |
69 | ||
1da177e4 | 70 | MODULE_DESCRIPTION(DRV_DESC); |
37448f7d ES |
71 | MODULE_AUTHOR |
72 | ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); | |
1da177e4 LT |
73 | MODULE_LICENSE("GPL"); |
74 | ||
37448f7d ES |
75 | /* minimum number of free TX descriptors required to wake up TX process */ |
76 | #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) | |
1da177e4 | 77 | |
37448f7d ES |
78 | /* If packet size is less than this number, we allocate small skb and copy packet |
79 | * contents into it instead of just sending original big skb up | |
80 | */ | |
81 | #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD | |
1da177e4 | 82 | |
37448f7d ES |
83 | /* Since multiple EMACs share MDIO lines in various ways, we need |
84 | * to avoid re-using the same PHY ID in cases where the arch didn't | |
85 | * setup precise phy_map entries | |
86 | */ | |
87 | static u32 busy_phy_map; | |
1da177e4 | 88 | |
1b195916 ES |
89 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) && \ |
90 | (defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)) | |
37448f7d ES |
91 | /* 405EP has "EMAC to PHY Control Register" (CPC0_EPCTL) which can help us |
92 | * with PHY RX clock problem. | |
1b195916 | 93 | * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, which |
37448f7d ES |
94 | * also allows controlling each EMAC clock |
95 | */ | |
96 | static inline void EMAC_RX_CLK_TX(int idx) | |
97 | { | |
98 | unsigned long flags; | |
99 | local_irq_save(flags); | |
1da177e4 | 100 | |
37448f7d ES |
101 | #if defined(CONFIG_405EP) |
102 | mtdcr(0xf3, mfdcr(0xf3) | (1 << idx)); | |
1b195916 | 103 | #else /* CONFIG_440EP || CONFIG_440GR */ |
37448f7d ES |
104 | SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) | (0x08000000 >> idx)); |
105 | #endif | |
1da177e4 | 106 | |
37448f7d ES |
107 | local_irq_restore(flags); |
108 | } | |
1da177e4 | 109 | |
37448f7d ES |
110 | static inline void EMAC_RX_CLK_DEFAULT(int idx) |
111 | { | |
112 | unsigned long flags; | |
113 | local_irq_save(flags); | |
1da177e4 | 114 | |
37448f7d ES |
115 | #if defined(CONFIG_405EP) |
116 | mtdcr(0xf3, mfdcr(0xf3) & ~(1 << idx)); | |
117 | #else /* CONFIG_440EP */ | |
118 | SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) & ~(0x08000000 >> idx)); | |
119 | #endif | |
1da177e4 | 120 | |
37448f7d ES |
121 | local_irq_restore(flags); |
122 | } | |
123 | #else | |
124 | #define EMAC_RX_CLK_TX(idx) ((void)0) | |
125 | #define EMAC_RX_CLK_DEFAULT(idx) ((void)0) | |
126 | #endif | |
1da177e4 | 127 | |
37448f7d ES |
128 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) && defined(CONFIG_440GX) |
129 | /* We can switch Ethernet clock to the internal source through SDR0_MFR[ECS], | |
130 | * unfortunately this is less flexible than 440EP case, because it's a global | |
131 | * setting for all EMACs, therefore we do this clock trick only during probe. | |
1da177e4 | 132 | */ |
37448f7d ES |
133 | #define EMAC_CLK_INTERNAL SDR_WRITE(DCRN_SDR_MFR, \ |
134 | SDR_READ(DCRN_SDR_MFR) | 0x08000000) | |
135 | #define EMAC_CLK_EXTERNAL SDR_WRITE(DCRN_SDR_MFR, \ | |
136 | SDR_READ(DCRN_SDR_MFR) & ~0x08000000) | |
137 | #else | |
138 | #define EMAC_CLK_INTERNAL ((void)0) | |
139 | #define EMAC_CLK_EXTERNAL ((void)0) | |
140 | #endif | |
1da177e4 | 141 | |
37448f7d ES |
142 | /* I don't want to litter system log with timeout errors |
143 | * when we have brain-damaged PHY. | |
144 | */ | |
145 | static inline void emac_report_timeout_error(struct ocp_enet_private *dev, | |
146 | const char *error) | |
147 | { | |
148 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) | |
149 | DBG("%d: %s" NL, dev->def->index, error); | |
150 | #else | |
151 | if (net_ratelimit()) | |
152 | printk(KERN_ERR "emac%d: %s\n", dev->def->index, error); | |
153 | #endif | |
154 | } | |
1da177e4 | 155 | |
37448f7d ES |
156 | /* PHY polling intervals */ |
157 | #define PHY_POLL_LINK_ON HZ | |
158 | #define PHY_POLL_LINK_OFF (HZ / 5) | |
159 | ||
8169bd91 ES |
160 | /* Graceful stop timeouts in us. |
161 | * We should allow up to 1 frame time (full-duplex, ignoring collisions) | |
162 | */ | |
163 | #define STOP_TIMEOUT_10 1230 | |
164 | #define STOP_TIMEOUT_100 124 | |
165 | #define STOP_TIMEOUT_1000 13 | |
166 | #define STOP_TIMEOUT_1000_JUMBO 73 | |
167 | ||
37448f7d ES |
168 | /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ |
169 | static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { | |
170 | "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", | |
171 | "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", | |
172 | "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", | |
173 | "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", | |
174 | "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", | |
175 | "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", | |
176 | "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", | |
177 | "rx_bad_packet", "rx_runt_packet", "rx_short_event", | |
178 | "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", | |
179 | "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", | |
180 | "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", | |
181 | "tx_bd_excessive_collisions", "tx_bd_late_collision", | |
182 | "tx_bd_multple_collisions", "tx_bd_single_collision", | |
183 | "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", | |
184 | "tx_errors" | |
1da177e4 LT |
185 | }; |
186 | ||
37448f7d ES |
187 | static irqreturn_t emac_irq(int irq, void *dev_instance, struct pt_regs *regs); |
188 | static void emac_clean_tx_ring(struct ocp_enet_private *dev); | |
189 | ||
190 | static inline int emac_phy_supports_gige(int phy_mode) | |
1da177e4 | 191 | { |
37448f7d ES |
192 | return phy_mode == PHY_MODE_GMII || |
193 | phy_mode == PHY_MODE_RGMII || | |
194 | phy_mode == PHY_MODE_TBI || | |
195 | phy_mode == PHY_MODE_RTBI; | |
196 | } | |
1da177e4 | 197 | |
37448f7d | 198 | static inline int emac_phy_gpcs(int phy_mode) |
1da177e4 | 199 | { |
37448f7d ES |
200 | return phy_mode == PHY_MODE_TBI || |
201 | phy_mode == PHY_MODE_RTBI; | |
202 | } | |
1da177e4 | 203 | |
37448f7d ES |
204 | static inline void emac_tx_enable(struct ocp_enet_private *dev) |
205 | { | |
b43de2d8 | 206 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
207 | unsigned long flags; |
208 | u32 r; | |
1da177e4 | 209 | |
37448f7d | 210 | local_irq_save(flags); |
1da177e4 | 211 | |
37448f7d | 212 | DBG("%d: tx_enable" NL, dev->def->index); |
1da177e4 | 213 | |
37448f7d ES |
214 | r = in_be32(&p->mr0); |
215 | if (!(r & EMAC_MR0_TXE)) | |
216 | out_be32(&p->mr0, r | EMAC_MR0_TXE); | |
217 | local_irq_restore(flags); | |
218 | } | |
1da177e4 | 219 | |
37448f7d ES |
220 | static void emac_tx_disable(struct ocp_enet_private *dev) |
221 | { | |
b43de2d8 | 222 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
223 | unsigned long flags; |
224 | u32 r; | |
1da177e4 | 225 | |
37448f7d | 226 | local_irq_save(flags); |
1da177e4 | 227 | |
37448f7d ES |
228 | DBG("%d: tx_disable" NL, dev->def->index); |
229 | ||
230 | r = in_be32(&p->mr0); | |
231 | if (r & EMAC_MR0_TXE) { | |
8169bd91 | 232 | int n = dev->stop_timeout; |
37448f7d | 233 | out_be32(&p->mr0, r & ~EMAC_MR0_TXE); |
8169bd91 ES |
234 | while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { |
235 | udelay(1); | |
37448f7d | 236 | --n; |
8169bd91 | 237 | } |
37448f7d ES |
238 | if (unlikely(!n)) |
239 | emac_report_timeout_error(dev, "TX disable timeout"); | |
240 | } | |
241 | local_irq_restore(flags); | |
242 | } | |
1da177e4 | 243 | |
37448f7d ES |
244 | static void emac_rx_enable(struct ocp_enet_private *dev) |
245 | { | |
b43de2d8 | 246 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
247 | unsigned long flags; |
248 | u32 r; | |
1da177e4 | 249 | |
37448f7d ES |
250 | local_irq_save(flags); |
251 | if (unlikely(dev->commac.rx_stopped)) | |
252 | goto out; | |
1da177e4 | 253 | |
37448f7d ES |
254 | DBG("%d: rx_enable" NL, dev->def->index); |
255 | ||
256 | r = in_be32(&p->mr0); | |
257 | if (!(r & EMAC_MR0_RXE)) { | |
258 | if (unlikely(!(r & EMAC_MR0_RXI))) { | |
259 | /* Wait if previous async disable is still in progress */ | |
8169bd91 ES |
260 | int n = dev->stop_timeout; |
261 | while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { | |
262 | udelay(1); | |
37448f7d | 263 | --n; |
8169bd91 | 264 | } |
37448f7d ES |
265 | if (unlikely(!n)) |
266 | emac_report_timeout_error(dev, | |
267 | "RX disable timeout"); | |
268 | } | |
269 | out_be32(&p->mr0, r | EMAC_MR0_RXE); | |
270 | } | |
271 | out: | |
272 | local_irq_restore(flags); | |
1da177e4 LT |
273 | } |
274 | ||
37448f7d | 275 | static void emac_rx_disable(struct ocp_enet_private *dev) |
1da177e4 | 276 | { |
b43de2d8 | 277 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
278 | unsigned long flags; |
279 | u32 r; | |
1da177e4 | 280 | |
37448f7d | 281 | local_irq_save(flags); |
1da177e4 | 282 | |
37448f7d | 283 | DBG("%d: rx_disable" NL, dev->def->index); |
1da177e4 | 284 | |
37448f7d ES |
285 | r = in_be32(&p->mr0); |
286 | if (r & EMAC_MR0_RXE) { | |
8169bd91 | 287 | int n = dev->stop_timeout; |
37448f7d | 288 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); |
8169bd91 ES |
289 | while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { |
290 | udelay(1); | |
37448f7d | 291 | --n; |
8169bd91 | 292 | } |
37448f7d ES |
293 | if (unlikely(!n)) |
294 | emac_report_timeout_error(dev, "RX disable timeout"); | |
295 | } | |
296 | local_irq_restore(flags); | |
1da177e4 LT |
297 | } |
298 | ||
37448f7d | 299 | static inline void emac_rx_disable_async(struct ocp_enet_private *dev) |
1da177e4 | 300 | { |
b43de2d8 | 301 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
302 | unsigned long flags; |
303 | u32 r; | |
1da177e4 | 304 | |
37448f7d ES |
305 | local_irq_save(flags); |
306 | ||
307 | DBG("%d: rx_disable_async" NL, dev->def->index); | |
308 | ||
309 | r = in_be32(&p->mr0); | |
310 | if (r & EMAC_MR0_RXE) | |
311 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); | |
312 | local_irq_restore(flags); | |
1da177e4 LT |
313 | } |
314 | ||
37448f7d | 315 | static int emac_reset(struct ocp_enet_private *dev) |
1da177e4 | 316 | { |
b43de2d8 | 317 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
318 | unsigned long flags; |
319 | int n = 20; | |
1da177e4 | 320 | |
37448f7d | 321 | DBG("%d: reset" NL, dev->def->index); |
1da177e4 | 322 | |
37448f7d | 323 | local_irq_save(flags); |
1da177e4 | 324 | |
37448f7d ES |
325 | if (!dev->reset_failed) { |
326 | /* 40x erratum suggests stopping RX channel before reset, | |
327 | * we stop TX as well | |
328 | */ | |
329 | emac_rx_disable(dev); | |
330 | emac_tx_disable(dev); | |
1da177e4 LT |
331 | } |
332 | ||
37448f7d ES |
333 | out_be32(&p->mr0, EMAC_MR0_SRST); |
334 | while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) | |
335 | --n; | |
336 | local_irq_restore(flags); | |
337 | ||
338 | if (n) { | |
339 | dev->reset_failed = 0; | |
340 | return 0; | |
1da177e4 | 341 | } else { |
37448f7d ES |
342 | emac_report_timeout_error(dev, "reset timeout"); |
343 | dev->reset_failed = 1; | |
344 | return -ETIMEDOUT; | |
1da177e4 | 345 | } |
37448f7d | 346 | } |
1da177e4 | 347 | |
37448f7d ES |
348 | static void emac_hash_mc(struct ocp_enet_private *dev) |
349 | { | |
b43de2d8 | 350 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
351 | u16 gaht[4] = { 0 }; |
352 | struct dev_mc_list *dmi; | |
1da177e4 | 353 | |
37448f7d | 354 | DBG("%d: hash_mc %d" NL, dev->def->index, dev->ndev->mc_count); |
1da177e4 | 355 | |
37448f7d ES |
356 | for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) { |
357 | int bit; | |
358 | DBG2("%d: mc %02x:%02x:%02x:%02x:%02x:%02x" NL, | |
359 | dev->def->index, | |
360 | dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2], | |
361 | dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]); | |
1da177e4 | 362 | |
37448f7d ES |
363 | bit = 63 - (ether_crc(ETH_ALEN, dmi->dmi_addr) >> 26); |
364 | gaht[bit >> 4] |= 0x8000 >> (bit & 0x0f); | |
365 | } | |
366 | out_be32(&p->gaht1, gaht[0]); | |
367 | out_be32(&p->gaht2, gaht[1]); | |
368 | out_be32(&p->gaht3, gaht[2]); | |
369 | out_be32(&p->gaht4, gaht[3]); | |
1da177e4 LT |
370 | } |
371 | ||
37448f7d | 372 | static inline u32 emac_iff2rmr(struct net_device *ndev) |
1da177e4 | 373 | { |
37448f7d ES |
374 | u32 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE | |
375 | EMAC_RMR_BASE; | |
376 | ||
377 | if (ndev->flags & IFF_PROMISC) | |
378 | r |= EMAC_RMR_PME; | |
379 | else if (ndev->flags & IFF_ALLMULTI || ndev->mc_count > 32) | |
380 | r |= EMAC_RMR_PMME; | |
381 | else if (ndev->mc_count > 0) | |
382 | r |= EMAC_RMR_MAE; | |
1da177e4 | 383 | |
37448f7d | 384 | return r; |
1da177e4 LT |
385 | } |
386 | ||
37448f7d | 387 | static inline int emac_opb_mhz(void) |
1da177e4 | 388 | { |
37448f7d | 389 | return (ocp_sys_info.opb_bus_freq + 500000) / 1000000; |
1da177e4 LT |
390 | } |
391 | ||
37448f7d ES |
392 | /* BHs disabled */ |
393 | static int emac_configure(struct ocp_enet_private *dev) | |
1da177e4 | 394 | { |
b43de2d8 | 395 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
396 | struct net_device *ndev = dev->ndev; |
397 | int gige; | |
398 | u32 r; | |
1da177e4 | 399 | |
37448f7d | 400 | DBG("%d: configure" NL, dev->def->index); |
1da177e4 | 401 | |
37448f7d ES |
402 | if (emac_reset(dev) < 0) |
403 | return -ETIMEDOUT; | |
1da177e4 | 404 | |
37448f7d | 405 | tah_reset(dev->tah_dev); |
1da177e4 | 406 | |
37448f7d ES |
407 | /* Mode register */ |
408 | r = EMAC_MR1_BASE(emac_opb_mhz()) | EMAC_MR1_VLE | EMAC_MR1_IST; | |
409 | if (dev->phy.duplex == DUPLEX_FULL) | |
38843888 | 410 | r |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; |
8169bd91 | 411 | dev->stop_timeout = STOP_TIMEOUT_10; |
37448f7d ES |
412 | switch (dev->phy.speed) { |
413 | case SPEED_1000: | |
414 | if (emac_phy_gpcs(dev->phy.mode)) { | |
415 | r |= EMAC_MR1_MF_1000GPCS | | |
416 | EMAC_MR1_MF_IPPA(dev->phy.address); | |
1da177e4 | 417 | |
37448f7d ES |
418 | /* Put some arbitrary OUI, Manuf & Rev IDs so we can |
419 | * identify this GPCS PHY later. | |
420 | */ | |
421 | out_be32(&p->ipcr, 0xdeadbeef); | |
422 | } else | |
423 | r |= EMAC_MR1_MF_1000; | |
424 | r |= EMAC_MR1_RFS_16K; | |
425 | gige = 1; | |
8169bd91 ES |
426 | |
427 | if (dev->ndev->mtu > ETH_DATA_LEN) { | |
37448f7d | 428 | r |= EMAC_MR1_JPSM; |
8169bd91 ES |
429 | dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; |
430 | } else | |
431 | dev->stop_timeout = STOP_TIMEOUT_1000; | |
37448f7d ES |
432 | break; |
433 | case SPEED_100: | |
434 | r |= EMAC_MR1_MF_100; | |
8169bd91 | 435 | dev->stop_timeout = STOP_TIMEOUT_100; |
37448f7d ES |
436 | /* Fall through */ |
437 | default: | |
438 | r |= EMAC_MR1_RFS_4K; | |
439 | gige = 0; | |
440 | break; | |
1da177e4 LT |
441 | } |
442 | ||
37448f7d ES |
443 | if (dev->rgmii_dev) |
444 | rgmii_set_speed(dev->rgmii_dev, dev->rgmii_input, | |
445 | dev->phy.speed); | |
446 | else | |
447 | zmii_set_speed(dev->zmii_dev, dev->zmii_input, dev->phy.speed); | |
1da177e4 | 448 | |
37448f7d ES |
449 | #if !defined(CONFIG_40x) |
450 | /* on 40x erratum forces us to NOT use integrated flow control, | |
451 | * let's hope it works on 44x ;) | |
452 | */ | |
453 | if (dev->phy.duplex == DUPLEX_FULL) { | |
454 | if (dev->phy.pause) | |
455 | r |= EMAC_MR1_EIFC | EMAC_MR1_APP; | |
456 | else if (dev->phy.asym_pause) | |
457 | r |= EMAC_MR1_APP; | |
1da177e4 | 458 | } |
37448f7d ES |
459 | #endif |
460 | out_be32(&p->mr1, r); | |
461 | ||
462 | /* Set individual MAC address */ | |
463 | out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); | |
464 | out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | | |
465 | (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | | |
466 | ndev->dev_addr[5]); | |
467 | ||
468 | /* VLAN Tag Protocol ID */ | |
469 | out_be32(&p->vtpid, 0x8100); | |
470 | ||
471 | /* Receive mode register */ | |
472 | r = emac_iff2rmr(ndev); | |
473 | if (r & EMAC_RMR_MAE) | |
474 | emac_hash_mc(dev); | |
475 | out_be32(&p->rmr, r); | |
476 | ||
477 | /* FIFOs thresholds */ | |
478 | r = EMAC_TMR1((EMAC_MAL_BURST_SIZE / EMAC_FIFO_ENTRY_SIZE) + 1, | |
479 | EMAC_TX_FIFO_SIZE / 2 / EMAC_FIFO_ENTRY_SIZE); | |
480 | out_be32(&p->tmr1, r); | |
481 | out_be32(&p->trtr, EMAC_TRTR(EMAC_TX_FIFO_SIZE / 2)); | |
482 | ||
483 | /* PAUSE frame is sent when RX FIFO reaches its high-water mark, | |
484 | there should be still enough space in FIFO to allow the our link | |
485 | partner time to process this frame and also time to send PAUSE | |
486 | frame itself. | |
487 | ||
488 | Here is the worst case scenario for the RX FIFO "headroom" | |
489 | (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): | |
490 | ||
491 | 1) One maximum-length frame on TX 1522 bytes | |
492 | 2) One PAUSE frame time 64 bytes | |
493 | 3) PAUSE frame decode time allowance 64 bytes | |
494 | 4) One maximum-length frame on RX 1522 bytes | |
495 | 5) Round-trip propagation delay of the link (100Mb) 15 bytes | |
496 | ---------- | |
497 | 3187 bytes | |
498 | ||
499 | I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) | |
500 | low-water mark to RX_FIFO_SIZE / 8 (512 bytes) | |
501 | */ | |
502 | r = EMAC_RWMR(EMAC_RX_FIFO_SIZE(gige) / 8 / EMAC_FIFO_ENTRY_SIZE, | |
503 | EMAC_RX_FIFO_SIZE(gige) / 4 / EMAC_FIFO_ENTRY_SIZE); | |
504 | out_be32(&p->rwmr, r); | |
505 | ||
506 | /* Set PAUSE timer to the maximum */ | |
507 | out_be32(&p->ptr, 0xffff); | |
508 | ||
509 | /* IRQ sources */ | |
510 | out_be32(&p->iser, EMAC_ISR_TXPE | EMAC_ISR_RXPE | /* EMAC_ISR_TXUE | | |
511 | EMAC_ISR_RXOE | */ EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | | |
512 | EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | | |
513 | EMAC_ISR_IRE | EMAC_ISR_TE); | |
514 | ||
515 | /* We need to take GPCS PHY out of isolate mode after EMAC reset */ | |
516 | if (emac_phy_gpcs(dev->phy.mode)) | |
517 | mii_reset_phy(&dev->phy); | |
518 | ||
519 | return 0; | |
520 | } | |
1da177e4 | 521 | |
37448f7d ES |
522 | /* BHs disabled */ |
523 | static void emac_reinitialize(struct ocp_enet_private *dev) | |
524 | { | |
525 | DBG("%d: reinitialize" NL, dev->def->index); | |
1da177e4 | 526 | |
37448f7d ES |
527 | if (!emac_configure(dev)) { |
528 | emac_tx_enable(dev); | |
529 | emac_rx_enable(dev); | |
530 | } | |
531 | } | |
1da177e4 | 532 | |
37448f7d ES |
533 | /* BHs disabled */ |
534 | static void emac_full_tx_reset(struct net_device *ndev) | |
535 | { | |
536 | struct ocp_enet_private *dev = ndev->priv; | |
537 | struct ocp_func_emac_data *emacdata = dev->def->additions; | |
1da177e4 | 538 | |
37448f7d | 539 | DBG("%d: full_tx_reset" NL, dev->def->index); |
1da177e4 | 540 | |
37448f7d ES |
541 | emac_tx_disable(dev); |
542 | mal_disable_tx_channel(dev->mal, emacdata->mal_tx_chan); | |
543 | emac_clean_tx_ring(dev); | |
544 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; | |
545 | ||
546 | emac_configure(dev); | |
1da177e4 | 547 | |
37448f7d ES |
548 | mal_enable_tx_channel(dev->mal, emacdata->mal_tx_chan); |
549 | emac_tx_enable(dev); | |
550 | emac_rx_enable(dev); | |
1da177e4 | 551 | |
37448f7d | 552 | netif_wake_queue(ndev); |
1da177e4 LT |
553 | } |
554 | ||
37448f7d | 555 | static int __emac_mdio_read(struct ocp_enet_private *dev, u8 id, u8 reg) |
1da177e4 | 556 | { |
b43de2d8 | 557 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
558 | u32 r; |
559 | int n; | |
1da177e4 | 560 | |
37448f7d | 561 | DBG2("%d: mdio_read(%02x,%02x)" NL, dev->def->index, id, reg); |
1da177e4 | 562 | |
37448f7d ES |
563 | /* Enable proper MDIO port */ |
564 | zmii_enable_mdio(dev->zmii_dev, dev->zmii_input); | |
1da177e4 | 565 | |
37448f7d ES |
566 | /* Wait for management interface to become idle */ |
567 | n = 10; | |
7ad8a89c | 568 | while (!emac_phy_done(in_be32(&p->stacr))) { |
37448f7d ES |
569 | udelay(1); |
570 | if (!--n) | |
571 | goto to; | |
1da177e4 LT |
572 | } |
573 | ||
37448f7d ES |
574 | /* Issue read command */ |
575 | out_be32(&p->stacr, | |
576 | EMAC_STACR_BASE(emac_opb_mhz()) | EMAC_STACR_STAC_READ | | |
577 | (reg & EMAC_STACR_PRA_MASK) | |
7ad8a89c ES |
578 | | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
579 | | EMAC_STACR_START); | |
37448f7d ES |
580 | |
581 | /* Wait for read to complete */ | |
582 | n = 100; | |
7ad8a89c | 583 | while (!emac_phy_done(r = in_be32(&p->stacr))) { |
1da177e4 | 584 | udelay(1); |
37448f7d ES |
585 | if (!--n) |
586 | goto to; | |
587 | } | |
1da177e4 | 588 | |
37448f7d ES |
589 | if (unlikely(r & EMAC_STACR_PHYE)) { |
590 | DBG("%d: mdio_read(%02x, %02x) failed" NL, dev->def->index, | |
591 | id, reg); | |
592 | return -EREMOTEIO; | |
1da177e4 LT |
593 | } |
594 | ||
37448f7d ES |
595 | r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); |
596 | DBG2("%d: mdio_read -> %04x" NL, dev->def->index, r); | |
597 | return r; | |
598 | to: | |
599 | DBG("%d: MII management interface timeout (read)" NL, dev->def->index); | |
600 | return -ETIMEDOUT; | |
601 | } | |
602 | ||
603 | static void __emac_mdio_write(struct ocp_enet_private *dev, u8 id, u8 reg, | |
604 | u16 val) | |
605 | { | |
b43de2d8 | 606 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d | 607 | int n; |
1da177e4 | 608 | |
37448f7d ES |
609 | DBG2("%d: mdio_write(%02x,%02x,%04x)" NL, dev->def->index, id, reg, |
610 | val); | |
1da177e4 | 611 | |
37448f7d ES |
612 | /* Enable proper MDIO port */ |
613 | zmii_enable_mdio(dev->zmii_dev, dev->zmii_input); | |
1da177e4 | 614 | |
37448f7d ES |
615 | /* Wait for management interface to be idle */ |
616 | n = 10; | |
7ad8a89c | 617 | while (!emac_phy_done(in_be32(&p->stacr))) { |
1da177e4 | 618 | udelay(1); |
37448f7d ES |
619 | if (!--n) |
620 | goto to; | |
621 | } | |
1da177e4 | 622 | |
37448f7d ES |
623 | /* Issue write command */ |
624 | out_be32(&p->stacr, | |
625 | EMAC_STACR_BASE(emac_opb_mhz()) | EMAC_STACR_STAC_WRITE | | |
626 | (reg & EMAC_STACR_PRA_MASK) | | |
627 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | | |
7ad8a89c | 628 | (val << EMAC_STACR_PHYD_SHIFT) | EMAC_STACR_START); |
1da177e4 | 629 | |
37448f7d ES |
630 | /* Wait for write to complete */ |
631 | n = 100; | |
7ad8a89c | 632 | while (!emac_phy_done(in_be32(&p->stacr))) { |
37448f7d ES |
633 | udelay(1); |
634 | if (!--n) | |
635 | goto to; | |
1da177e4 | 636 | } |
37448f7d ES |
637 | return; |
638 | to: | |
639 | DBG("%d: MII management interface timeout (write)" NL, dev->def->index); | |
1da177e4 LT |
640 | } |
641 | ||
37448f7d | 642 | static int emac_mdio_read(struct net_device *ndev, int id, int reg) |
1da177e4 | 643 | { |
37448f7d ES |
644 | struct ocp_enet_private *dev = ndev->priv; |
645 | int res; | |
646 | ||
647 | local_bh_disable(); | |
648 | res = __emac_mdio_read(dev->mdio_dev ? dev->mdio_dev : dev, (u8) id, | |
649 | (u8) reg); | |
650 | local_bh_enable(); | |
651 | return res; | |
652 | } | |
1da177e4 | 653 | |
37448f7d ES |
654 | static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) |
655 | { | |
656 | struct ocp_enet_private *dev = ndev->priv; | |
1da177e4 | 657 | |
37448f7d ES |
658 | local_bh_disable(); |
659 | __emac_mdio_write(dev->mdio_dev ? dev->mdio_dev : dev, (u8) id, | |
660 | (u8) reg, (u16) val); | |
661 | local_bh_enable(); | |
662 | } | |
1da177e4 | 663 | |
37448f7d ES |
664 | /* BHs disabled */ |
665 | static void emac_set_multicast_list(struct net_device *ndev) | |
666 | { | |
667 | struct ocp_enet_private *dev = ndev->priv; | |
b43de2d8 | 668 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
669 | u32 rmr = emac_iff2rmr(ndev); |
670 | ||
671 | DBG("%d: multicast %08x" NL, dev->def->index, rmr); | |
672 | BUG_ON(!netif_running(dev->ndev)); | |
673 | ||
674 | /* I decided to relax register access rules here to avoid | |
675 | * full EMAC reset. | |
676 | * | |
677 | * There is a real problem with EMAC4 core if we use MWSW_001 bit | |
678 | * in MR1 register and do a full EMAC reset. | |
679 | * One TX BD status update is delayed and, after EMAC reset, it | |
680 | * never happens, resulting in TX hung (it'll be recovered by TX | |
681 | * timeout handler eventually, but this is just gross). | |
682 | * So we either have to do full TX reset or try to cheat here :) | |
683 | * | |
684 | * The only required change is to RX mode register, so I *think* all | |
685 | * we need is just to stop RX channel. This seems to work on all | |
686 | * tested SoCs. --ebs | |
687 | */ | |
688 | emac_rx_disable(dev); | |
689 | if (rmr & EMAC_RMR_MAE) | |
690 | emac_hash_mc(dev); | |
691 | out_be32(&p->rmr, rmr); | |
692 | emac_rx_enable(dev); | |
693 | } | |
1da177e4 | 694 | |
37448f7d ES |
695 | /* BHs disabled */ |
696 | static int emac_resize_rx_ring(struct ocp_enet_private *dev, int new_mtu) | |
697 | { | |
698 | struct ocp_func_emac_data *emacdata = dev->def->additions; | |
699 | int rx_sync_size = emac_rx_sync_size(new_mtu); | |
700 | int rx_skb_size = emac_rx_skb_size(new_mtu); | |
701 | int i, ret = 0; | |
702 | ||
703 | emac_rx_disable(dev); | |
704 | mal_disable_rx_channel(dev->mal, emacdata->mal_rx_chan); | |
705 | ||
706 | if (dev->rx_sg_skb) { | |
707 | ++dev->estats.rx_dropped_resize; | |
708 | dev_kfree_skb(dev->rx_sg_skb); | |
709 | dev->rx_sg_skb = NULL; | |
1da177e4 | 710 | } |
1da177e4 | 711 | |
37448f7d ES |
712 | /* Make a first pass over RX ring and mark BDs ready, dropping |
713 | * non-processed packets on the way. We need this as a separate pass | |
714 | * to simplify error recovery in the case of allocation failure later. | |
715 | */ | |
716 | for (i = 0; i < NUM_RX_BUFF; ++i) { | |
717 | if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) | |
718 | ++dev->estats.rx_dropped_resize; | |
1da177e4 | 719 | |
37448f7d ES |
720 | dev->rx_desc[i].data_len = 0; |
721 | dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | | |
722 | (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
723 | } | |
1da177e4 | 724 | |
37448f7d ES |
725 | /* Reallocate RX ring only if bigger skb buffers are required */ |
726 | if (rx_skb_size <= dev->rx_skb_size) | |
727 | goto skip; | |
1da177e4 | 728 | |
37448f7d ES |
729 | /* Second pass, allocate new skbs */ |
730 | for (i = 0; i < NUM_RX_BUFF; ++i) { | |
731 | struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); | |
732 | if (!skb) { | |
733 | ret = -ENOMEM; | |
734 | goto oom; | |
1da177e4 LT |
735 | } |
736 | ||
37448f7d ES |
737 | BUG_ON(!dev->rx_skb[i]); |
738 | dev_kfree_skb(dev->rx_skb[i]); | |
1da177e4 | 739 | |
37448f7d ES |
740 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); |
741 | dev->rx_desc[i].data_ptr = | |
742 | dma_map_single(dev->ldev, skb->data - 2, rx_sync_size, | |
743 | DMA_FROM_DEVICE) + 2; | |
744 | dev->rx_skb[i] = skb; | |
745 | } | |
746 | skip: | |
747 | /* Check if we need to change "Jumbo" bit in MR1 */ | |
748 | if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) { | |
749 | /* This is to prevent starting RX channel in emac_rx_enable() */ | |
750 | dev->commac.rx_stopped = 1; | |
751 | ||
752 | dev->ndev->mtu = new_mtu; | |
753 | emac_full_tx_reset(dev->ndev); | |
754 | } | |
1da177e4 | 755 | |
37448f7d ES |
756 | mal_set_rcbs(dev->mal, emacdata->mal_rx_chan, emac_rx_size(new_mtu)); |
757 | oom: | |
758 | /* Restart RX */ | |
759 | dev->commac.rx_stopped = dev->rx_slot = 0; | |
760 | mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan); | |
761 | emac_rx_enable(dev); | |
1da177e4 | 762 | |
37448f7d | 763 | return ret; |
1da177e4 LT |
764 | } |
765 | ||
37448f7d ES |
766 | /* Process ctx, rtnl_lock semaphore */ |
767 | static int emac_change_mtu(struct net_device *ndev, int new_mtu) | |
1da177e4 | 768 | { |
37448f7d ES |
769 | struct ocp_enet_private *dev = ndev->priv; |
770 | int ret = 0; | |
1da177e4 | 771 | |
37448f7d ES |
772 | if (new_mtu < EMAC_MIN_MTU || new_mtu > EMAC_MAX_MTU) |
773 | return -EINVAL; | |
1da177e4 | 774 | |
37448f7d | 775 | DBG("%d: change_mtu(%d)" NL, dev->def->index, new_mtu); |
1da177e4 | 776 | |
37448f7d ES |
777 | local_bh_disable(); |
778 | if (netif_running(ndev)) { | |
779 | /* Check if we really need to reinitalize RX ring */ | |
780 | if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) | |
781 | ret = emac_resize_rx_ring(dev, new_mtu); | |
782 | } | |
1da177e4 | 783 | |
37448f7d ES |
784 | if (!ret) { |
785 | ndev->mtu = new_mtu; | |
786 | dev->rx_skb_size = emac_rx_skb_size(new_mtu); | |
787 | dev->rx_sync_size = emac_rx_sync_size(new_mtu); | |
788 | } | |
789 | local_bh_enable(); | |
1da177e4 | 790 | |
37448f7d ES |
791 | return ret; |
792 | } | |
1da177e4 | 793 | |
37448f7d ES |
794 | static void emac_clean_tx_ring(struct ocp_enet_private *dev) |
795 | { | |
796 | int i; | |
797 | for (i = 0; i < NUM_TX_BUFF; ++i) { | |
798 | if (dev->tx_skb[i]) { | |
799 | dev_kfree_skb(dev->tx_skb[i]); | |
800 | dev->tx_skb[i] = NULL; | |
801 | if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) | |
802 | ++dev->estats.tx_dropped; | |
1da177e4 | 803 | } |
37448f7d ES |
804 | dev->tx_desc[i].ctrl = 0; |
805 | dev->tx_desc[i].data_ptr = 0; | |
806 | } | |
1da177e4 LT |
807 | } |
808 | ||
37448f7d | 809 | static void emac_clean_rx_ring(struct ocp_enet_private *dev) |
1da177e4 | 810 | { |
37448f7d ES |
811 | int i; |
812 | for (i = 0; i < NUM_RX_BUFF; ++i) | |
813 | if (dev->rx_skb[i]) { | |
814 | dev->rx_desc[i].ctrl = 0; | |
815 | dev_kfree_skb(dev->rx_skb[i]); | |
816 | dev->rx_skb[i] = NULL; | |
817 | dev->rx_desc[i].data_ptr = 0; | |
818 | } | |
1da177e4 | 819 | |
37448f7d ES |
820 | if (dev->rx_sg_skb) { |
821 | dev_kfree_skb(dev->rx_sg_skb); | |
822 | dev->rx_sg_skb = NULL; | |
823 | } | |
1da177e4 LT |
824 | } |
825 | ||
37448f7d | 826 | static inline int emac_alloc_rx_skb(struct ocp_enet_private *dev, int slot, |
b43de2d8 | 827 | gfp_t flags) |
1da177e4 | 828 | { |
37448f7d ES |
829 | struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); |
830 | if (unlikely(!skb)) | |
831 | return -ENOMEM; | |
1da177e4 | 832 | |
37448f7d ES |
833 | dev->rx_skb[slot] = skb; |
834 | dev->rx_desc[slot].data_len = 0; | |
1da177e4 | 835 | |
37448f7d ES |
836 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); |
837 | dev->rx_desc[slot].data_ptr = | |
838 | dma_map_single(dev->ldev, skb->data - 2, dev->rx_sync_size, | |
839 | DMA_FROM_DEVICE) + 2; | |
840 | barrier(); | |
841 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | | |
842 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1da177e4 | 843 | |
37448f7d | 844 | return 0; |
1da177e4 LT |
845 | } |
846 | ||
37448f7d | 847 | static void emac_print_link_status(struct ocp_enet_private *dev) |
1da177e4 | 848 | { |
37448f7d ES |
849 | if (netif_carrier_ok(dev->ndev)) |
850 | printk(KERN_INFO "%s: link is up, %d %s%s\n", | |
851 | dev->ndev->name, dev->phy.speed, | |
852 | dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", | |
853 | dev->phy.pause ? ", pause enabled" : | |
854 | dev->phy.asym_pause ? ", assymetric pause enabled" : ""); | |
855 | else | |
856 | printk(KERN_INFO "%s: link is down\n", dev->ndev->name); | |
857 | } | |
1da177e4 | 858 | |
37448f7d ES |
859 | /* Process ctx, rtnl_lock semaphore */ |
860 | static int emac_open(struct net_device *ndev) | |
861 | { | |
862 | struct ocp_enet_private *dev = ndev->priv; | |
863 | struct ocp_func_emac_data *emacdata = dev->def->additions; | |
864 | int err, i; | |
865 | ||
866 | DBG("%d: open" NL, dev->def->index); | |
867 | ||
868 | /* Setup error IRQ handler */ | |
869 | err = request_irq(dev->def->irq, emac_irq, 0, "EMAC", dev); | |
870 | if (err) { | |
871 | printk(KERN_ERR "%s: failed to request IRQ %d\n", | |
872 | ndev->name, dev->def->irq); | |
873 | return err; | |
1da177e4 LT |
874 | } |
875 | ||
37448f7d ES |
876 | /* Allocate RX ring */ |
877 | for (i = 0; i < NUM_RX_BUFF; ++i) | |
878 | if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { | |
879 | printk(KERN_ERR "%s: failed to allocate RX ring\n", | |
880 | ndev->name); | |
881 | goto oom; | |
882 | } | |
1da177e4 | 883 | |
37448f7d ES |
884 | local_bh_disable(); |
885 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = | |
886 | dev->commac.rx_stopped = 0; | |
887 | dev->rx_sg_skb = NULL; | |
888 | ||
889 | if (dev->phy.address >= 0) { | |
890 | int link_poll_interval; | |
891 | if (dev->phy.def->ops->poll_link(&dev->phy)) { | |
892 | dev->phy.def->ops->read_link(&dev->phy); | |
893 | EMAC_RX_CLK_DEFAULT(dev->def->index); | |
894 | netif_carrier_on(dev->ndev); | |
895 | link_poll_interval = PHY_POLL_LINK_ON; | |
896 | } else { | |
897 | EMAC_RX_CLK_TX(dev->def->index); | |
898 | netif_carrier_off(dev->ndev); | |
899 | link_poll_interval = PHY_POLL_LINK_OFF; | |
900 | } | |
901 | mod_timer(&dev->link_timer, jiffies + link_poll_interval); | |
902 | emac_print_link_status(dev); | |
903 | } else | |
904 | netif_carrier_on(dev->ndev); | |
905 | ||
906 | emac_configure(dev); | |
907 | mal_poll_add(dev->mal, &dev->commac); | |
908 | mal_enable_tx_channel(dev->mal, emacdata->mal_tx_chan); | |
909 | mal_set_rcbs(dev->mal, emacdata->mal_rx_chan, emac_rx_size(ndev->mtu)); | |
910 | mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan); | |
911 | emac_tx_enable(dev); | |
912 | emac_rx_enable(dev); | |
913 | netif_start_queue(ndev); | |
914 | local_bh_enable(); | |
1da177e4 | 915 | |
37448f7d ES |
916 | return 0; |
917 | oom: | |
918 | emac_clean_rx_ring(dev); | |
919 | free_irq(dev->def->irq, dev); | |
920 | return -ENOMEM; | |
1da177e4 LT |
921 | } |
922 | ||
37448f7d ES |
923 | /* BHs disabled */ |
924 | static int emac_link_differs(struct ocp_enet_private *dev) | |
1da177e4 | 925 | { |
37448f7d | 926 | u32 r = in_be32(&dev->emacp->mr1); |
1da177e4 | 927 | |
37448f7d ES |
928 | int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; |
929 | int speed, pause, asym_pause; | |
1da177e4 | 930 | |
37448f7d ES |
931 | if (r & (EMAC_MR1_MF_1000 | EMAC_MR1_MF_1000GPCS)) |
932 | speed = SPEED_1000; | |
933 | else if (r & EMAC_MR1_MF_100) | |
934 | speed = SPEED_100; | |
935 | else | |
936 | speed = SPEED_10; | |
1da177e4 | 937 | |
37448f7d ES |
938 | switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { |
939 | case (EMAC_MR1_EIFC | EMAC_MR1_APP): | |
940 | pause = 1; | |
941 | asym_pause = 0; | |
942 | break; | |
943 | case EMAC_MR1_APP: | |
944 | pause = 0; | |
945 | asym_pause = 1; | |
946 | break; | |
947 | default: | |
948 | pause = asym_pause = 0; | |
1da177e4 | 949 | } |
37448f7d ES |
950 | return speed != dev->phy.speed || duplex != dev->phy.duplex || |
951 | pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; | |
1da177e4 LT |
952 | } |
953 | ||
37448f7d ES |
954 | /* BHs disabled */ |
955 | static void emac_link_timer(unsigned long data) | |
1da177e4 | 956 | { |
37448f7d ES |
957 | struct ocp_enet_private *dev = (struct ocp_enet_private *)data; |
958 | int link_poll_interval; | |
1da177e4 | 959 | |
37448f7d | 960 | DBG2("%d: link timer" NL, dev->def->index); |
1da177e4 | 961 | |
37448f7d ES |
962 | if (dev->phy.def->ops->poll_link(&dev->phy)) { |
963 | if (!netif_carrier_ok(dev->ndev)) { | |
964 | EMAC_RX_CLK_DEFAULT(dev->def->index); | |
1da177e4 | 965 | |
37448f7d ES |
966 | /* Get new link parameters */ |
967 | dev->phy.def->ops->read_link(&dev->phy); | |
1da177e4 | 968 | |
37448f7d ES |
969 | if (dev->tah_dev || emac_link_differs(dev)) |
970 | emac_full_tx_reset(dev->ndev); | |
1da177e4 | 971 | |
37448f7d ES |
972 | netif_carrier_on(dev->ndev); |
973 | emac_print_link_status(dev); | |
974 | } | |
975 | link_poll_interval = PHY_POLL_LINK_ON; | |
976 | } else { | |
977 | if (netif_carrier_ok(dev->ndev)) { | |
978 | EMAC_RX_CLK_TX(dev->def->index); | |
979 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) | |
980 | emac_reinitialize(dev); | |
981 | #endif | |
982 | netif_carrier_off(dev->ndev); | |
983 | emac_print_link_status(dev); | |
1da177e4 | 984 | } |
1da177e4 | 985 | |
37448f7d ES |
986 | /* Retry reset if the previous attempt failed. |
987 | * This is needed mostly for CONFIG_IBM_EMAC_PHY_RX_CLK_FIX | |
988 | * case, but I left it here because it shouldn't trigger for | |
989 | * sane PHYs anyway. | |
990 | */ | |
991 | if (unlikely(dev->reset_failed)) | |
992 | emac_reinitialize(dev); | |
1da177e4 | 993 | |
37448f7d | 994 | link_poll_interval = PHY_POLL_LINK_OFF; |
1da177e4 | 995 | } |
37448f7d ES |
996 | mod_timer(&dev->link_timer, jiffies + link_poll_interval); |
997 | } | |
1da177e4 | 998 | |
37448f7d ES |
999 | /* BHs disabled */ |
1000 | static void emac_force_link_update(struct ocp_enet_private *dev) | |
1001 | { | |
1002 | netif_carrier_off(dev->ndev); | |
1003 | if (timer_pending(&dev->link_timer)) | |
1004 | mod_timer(&dev->link_timer, jiffies + PHY_POLL_LINK_OFF); | |
1005 | } | |
1da177e4 | 1006 | |
37448f7d ES |
1007 | /* Process ctx, rtnl_lock semaphore */ |
1008 | static int emac_close(struct net_device *ndev) | |
1009 | { | |
1010 | struct ocp_enet_private *dev = ndev->priv; | |
1011 | struct ocp_func_emac_data *emacdata = dev->def->additions; | |
1da177e4 | 1012 | |
37448f7d | 1013 | DBG("%d: close" NL, dev->def->index); |
1da177e4 | 1014 | |
37448f7d | 1015 | local_bh_disable(); |
1da177e4 | 1016 | |
37448f7d ES |
1017 | if (dev->phy.address >= 0) |
1018 | del_timer_sync(&dev->link_timer); | |
1da177e4 | 1019 | |
37448f7d ES |
1020 | netif_stop_queue(ndev); |
1021 | emac_rx_disable(dev); | |
1022 | emac_tx_disable(dev); | |
1023 | mal_disable_rx_channel(dev->mal, emacdata->mal_rx_chan); | |
1024 | mal_disable_tx_channel(dev->mal, emacdata->mal_tx_chan); | |
1025 | mal_poll_del(dev->mal, &dev->commac); | |
1026 | local_bh_enable(); | |
1da177e4 | 1027 | |
37448f7d ES |
1028 | emac_clean_tx_ring(dev); |
1029 | emac_clean_rx_ring(dev); | |
1030 | free_irq(dev->def->irq, dev); | |
1da177e4 LT |
1031 | |
1032 | return 0; | |
1033 | } | |
1034 | ||
37448f7d ES |
1035 | static inline u16 emac_tx_csum(struct ocp_enet_private *dev, |
1036 | struct sk_buff *skb) | |
1da177e4 | 1037 | { |
37448f7d ES |
1038 | #if defined(CONFIG_IBM_EMAC_TAH) |
1039 | if (skb->ip_summed == CHECKSUM_HW) { | |
1040 | ++dev->stats.tx_packets_csum; | |
1041 | return EMAC_TX_CTRL_TAH_CSUM; | |
1da177e4 | 1042 | } |
37448f7d ES |
1043 | #endif |
1044 | return 0; | |
1045 | } | |
1da177e4 | 1046 | |
37448f7d ES |
1047 | static inline int emac_xmit_finish(struct ocp_enet_private *dev, int len) |
1048 | { | |
b43de2d8 | 1049 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d | 1050 | struct net_device *ndev = dev->ndev; |
1da177e4 | 1051 | |
37448f7d ES |
1052 | /* Send the packet out */ |
1053 | out_be32(&p->tmr0, EMAC_TMR0_XMIT); | |
1da177e4 | 1054 | |
37448f7d ES |
1055 | if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { |
1056 | netif_stop_queue(ndev); | |
1057 | DBG2("%d: stopped TX queue" NL, dev->def->index); | |
1058 | } | |
1da177e4 | 1059 | |
37448f7d ES |
1060 | ndev->trans_start = jiffies; |
1061 | ++dev->stats.tx_packets; | |
1062 | dev->stats.tx_bytes += len; | |
1da177e4 LT |
1063 | |
1064 | return 0; | |
1065 | } | |
1066 | ||
37448f7d ES |
1067 | /* BHs disabled */ |
1068 | static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1da177e4 | 1069 | { |
37448f7d ES |
1070 | struct ocp_enet_private *dev = ndev->priv; |
1071 | unsigned int len = skb->len; | |
1072 | int slot; | |
1da177e4 | 1073 | |
37448f7d ES |
1074 | u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | |
1075 | MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); | |
1da177e4 | 1076 | |
37448f7d ES |
1077 | slot = dev->tx_slot++; |
1078 | if (dev->tx_slot == NUM_TX_BUFF) { | |
1079 | dev->tx_slot = 0; | |
1080 | ctrl |= MAL_TX_CTRL_WRAP; | |
1081 | } | |
1da177e4 | 1082 | |
37448f7d | 1083 | DBG2("%d: xmit(%u) %d" NL, dev->def->index, len, slot); |
1da177e4 | 1084 | |
37448f7d ES |
1085 | dev->tx_skb[slot] = skb; |
1086 | dev->tx_desc[slot].data_ptr = dma_map_single(dev->ldev, skb->data, len, | |
1087 | DMA_TO_DEVICE); | |
1088 | dev->tx_desc[slot].data_len = (u16) len; | |
1089 | barrier(); | |
1090 | dev->tx_desc[slot].ctrl = ctrl; | |
1da177e4 | 1091 | |
37448f7d | 1092 | return emac_xmit_finish(dev, len); |
1da177e4 LT |
1093 | } |
1094 | ||
37448f7d ES |
1095 | #if defined(CONFIG_IBM_EMAC_TAH) |
1096 | static inline int emac_xmit_split(struct ocp_enet_private *dev, int slot, | |
1097 | u32 pd, int len, int last, u16 base_ctrl) | |
1da177e4 | 1098 | { |
37448f7d ES |
1099 | while (1) { |
1100 | u16 ctrl = base_ctrl; | |
1101 | int chunk = min(len, MAL_MAX_TX_SIZE); | |
1102 | len -= chunk; | |
1da177e4 | 1103 | |
37448f7d | 1104 | slot = (slot + 1) % NUM_TX_BUFF; |
1da177e4 | 1105 | |
37448f7d ES |
1106 | if (last && !len) |
1107 | ctrl |= MAL_TX_CTRL_LAST; | |
1108 | if (slot == NUM_TX_BUFF - 1) | |
1109 | ctrl |= MAL_TX_CTRL_WRAP; | |
1da177e4 | 1110 | |
37448f7d ES |
1111 | dev->tx_skb[slot] = NULL; |
1112 | dev->tx_desc[slot].data_ptr = pd; | |
1113 | dev->tx_desc[slot].data_len = (u16) chunk; | |
1114 | dev->tx_desc[slot].ctrl = ctrl; | |
1115 | ++dev->tx_cnt; | |
1da177e4 | 1116 | |
37448f7d ES |
1117 | if (!len) |
1118 | break; | |
1da177e4 | 1119 | |
37448f7d | 1120 | pd += chunk; |
1da177e4 | 1121 | } |
37448f7d | 1122 | return slot; |
1da177e4 LT |
1123 | } |
1124 | ||
37448f7d ES |
1125 | /* BHs disabled (SG version for TAH equipped EMACs) */ |
1126 | static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) | |
1da177e4 | 1127 | { |
37448f7d ES |
1128 | struct ocp_enet_private *dev = ndev->priv; |
1129 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
1130 | int len = skb->len, chunk; | |
1131 | int slot, i; | |
1132 | u16 ctrl; | |
1133 | u32 pd; | |
1da177e4 | 1134 | |
37448f7d ES |
1135 | /* This is common "fast" path */ |
1136 | if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) | |
1137 | return emac_start_xmit(skb, ndev); | |
1da177e4 | 1138 | |
37448f7d | 1139 | len -= skb->data_len; |
1da177e4 | 1140 | |
37448f7d ES |
1141 | /* Note, this is only an *estimation*, we can still run out of empty |
1142 | * slots because of the additional fragmentation into | |
1143 | * MAL_MAX_TX_SIZE-sized chunks | |
1144 | */ | |
1145 | if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) | |
1146 | goto stop_queue; | |
1147 | ||
1148 | ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | | |
1149 | emac_tx_csum(dev, skb); | |
1150 | slot = dev->tx_slot; | |
1151 | ||
1152 | /* skb data */ | |
1153 | dev->tx_skb[slot] = NULL; | |
1154 | chunk = min(len, MAL_MAX_TX_SIZE); | |
1155 | dev->tx_desc[slot].data_ptr = pd = | |
1156 | dma_map_single(dev->ldev, skb->data, len, DMA_TO_DEVICE); | |
1157 | dev->tx_desc[slot].data_len = (u16) chunk; | |
1158 | len -= chunk; | |
1159 | if (unlikely(len)) | |
1160 | slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, | |
1161 | ctrl); | |
1162 | /* skb fragments */ | |
1163 | for (i = 0; i < nr_frags; ++i) { | |
1164 | struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; | |
1165 | len = frag->size; | |
1da177e4 | 1166 | |
37448f7d ES |
1167 | if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) |
1168 | goto undo_frame; | |
1da177e4 | 1169 | |
37448f7d ES |
1170 | pd = dma_map_page(dev->ldev, frag->page, frag->page_offset, len, |
1171 | DMA_TO_DEVICE); | |
1da177e4 | 1172 | |
37448f7d ES |
1173 | slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, |
1174 | ctrl); | |
1da177e4 LT |
1175 | } |
1176 | ||
37448f7d ES |
1177 | DBG2("%d: xmit_sg(%u) %d - %d" NL, dev->def->index, skb->len, |
1178 | dev->tx_slot, slot); | |
1da177e4 | 1179 | |
37448f7d ES |
1180 | /* Attach skb to the last slot so we don't release it too early */ |
1181 | dev->tx_skb[slot] = skb; | |
1da177e4 | 1182 | |
37448f7d ES |
1183 | /* Send the packet out */ |
1184 | if (dev->tx_slot == NUM_TX_BUFF - 1) | |
1185 | ctrl |= MAL_TX_CTRL_WRAP; | |
1186 | barrier(); | |
1187 | dev->tx_desc[dev->tx_slot].ctrl = ctrl; | |
1188 | dev->tx_slot = (slot + 1) % NUM_TX_BUFF; | |
1da177e4 | 1189 | |
37448f7d | 1190 | return emac_xmit_finish(dev, skb->len); |
1da177e4 | 1191 | |
37448f7d ES |
1192 | undo_frame: |
1193 | /* Well, too bad. Our previous estimation was overly optimistic. | |
1194 | * Undo everything. | |
1195 | */ | |
1196 | while (slot != dev->tx_slot) { | |
1197 | dev->tx_desc[slot].ctrl = 0; | |
1198 | --dev->tx_cnt; | |
1199 | if (--slot < 0) | |
1200 | slot = NUM_TX_BUFF - 1; | |
1201 | } | |
1202 | ++dev->estats.tx_undo; | |
1203 | ||
1204 | stop_queue: | |
1205 | netif_stop_queue(ndev); | |
1206 | DBG2("%d: stopped TX queue" NL, dev->def->index); | |
1207 | return 1; | |
1208 | } | |
1209 | #else | |
1210 | # define emac_start_xmit_sg emac_start_xmit | |
1211 | #endif /* !defined(CONFIG_IBM_EMAC_TAH) */ | |
1212 | ||
1213 | /* BHs disabled */ | |
1214 | static void emac_parse_tx_error(struct ocp_enet_private *dev, u16 ctrl) | |
1215 | { | |
1216 | struct ibm_emac_error_stats *st = &dev->estats; | |
1217 | DBG("%d: BD TX error %04x" NL, dev->def->index, ctrl); | |
1218 | ||
1219 | ++st->tx_bd_errors; | |
1220 | if (ctrl & EMAC_TX_ST_BFCS) | |
1221 | ++st->tx_bd_bad_fcs; | |
1222 | if (ctrl & EMAC_TX_ST_LCS) | |
1223 | ++st->tx_bd_carrier_loss; | |
1224 | if (ctrl & EMAC_TX_ST_ED) | |
1225 | ++st->tx_bd_excessive_deferral; | |
1226 | if (ctrl & EMAC_TX_ST_EC) | |
1227 | ++st->tx_bd_excessive_collisions; | |
1228 | if (ctrl & EMAC_TX_ST_LC) | |
1229 | ++st->tx_bd_late_collision; | |
1230 | if (ctrl & EMAC_TX_ST_MC) | |
1231 | ++st->tx_bd_multple_collisions; | |
1232 | if (ctrl & EMAC_TX_ST_SC) | |
1233 | ++st->tx_bd_single_collision; | |
1234 | if (ctrl & EMAC_TX_ST_UR) | |
1235 | ++st->tx_bd_underrun; | |
1236 | if (ctrl & EMAC_TX_ST_SQE) | |
1237 | ++st->tx_bd_sqe; | |
1da177e4 LT |
1238 | } |
1239 | ||
37448f7d | 1240 | static void emac_poll_tx(void *param) |
1da177e4 | 1241 | { |
37448f7d ES |
1242 | struct ocp_enet_private *dev = param; |
1243 | DBG2("%d: poll_tx, %d %d" NL, dev->def->index, dev->tx_cnt, | |
1244 | dev->ack_slot); | |
1245 | ||
1246 | if (dev->tx_cnt) { | |
1247 | u16 ctrl; | |
1248 | int slot = dev->ack_slot, n = 0; | |
1249 | again: | |
1250 | ctrl = dev->tx_desc[slot].ctrl; | |
1251 | if (!(ctrl & MAL_TX_CTRL_READY)) { | |
1252 | struct sk_buff *skb = dev->tx_skb[slot]; | |
1253 | ++n; | |
1254 | ||
1255 | if (skb) { | |
1256 | dev_kfree_skb(skb); | |
1257 | dev->tx_skb[slot] = NULL; | |
1258 | } | |
1259 | slot = (slot + 1) % NUM_TX_BUFF; | |
1da177e4 | 1260 | |
37448f7d ES |
1261 | if (unlikely(EMAC_IS_BAD_TX(ctrl))) |
1262 | emac_parse_tx_error(dev, ctrl); | |
1da177e4 | 1263 | |
37448f7d ES |
1264 | if (--dev->tx_cnt) |
1265 | goto again; | |
1da177e4 | 1266 | } |
37448f7d ES |
1267 | if (n) { |
1268 | dev->ack_slot = slot; | |
1269 | if (netif_queue_stopped(dev->ndev) && | |
1270 | dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) | |
1271 | netif_wake_queue(dev->ndev); | |
1da177e4 | 1272 | |
37448f7d ES |
1273 | DBG2("%d: tx %d pkts" NL, dev->def->index, n); |
1274 | } | |
1275 | } | |
1da177e4 LT |
1276 | } |
1277 | ||
37448f7d ES |
1278 | static inline void emac_recycle_rx_skb(struct ocp_enet_private *dev, int slot, |
1279 | int len) | |
1da177e4 | 1280 | { |
37448f7d ES |
1281 | struct sk_buff *skb = dev->rx_skb[slot]; |
1282 | DBG2("%d: recycle %d %d" NL, dev->def->index, slot, len); | |
1da177e4 | 1283 | |
37448f7d ES |
1284 | if (len) |
1285 | dma_map_single(dev->ldev, skb->data - 2, | |
1286 | EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); | |
1da177e4 | 1287 | |
37448f7d ES |
1288 | dev->rx_desc[slot].data_len = 0; |
1289 | barrier(); | |
1290 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | | |
1291 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); | |
1292 | } | |
1293 | ||
1294 | static void emac_parse_rx_error(struct ocp_enet_private *dev, u16 ctrl) | |
1295 | { | |
1296 | struct ibm_emac_error_stats *st = &dev->estats; | |
1297 | DBG("%d: BD RX error %04x" NL, dev->def->index, ctrl); | |
1298 | ||
1299 | ++st->rx_bd_errors; | |
1300 | if (ctrl & EMAC_RX_ST_OE) | |
1301 | ++st->rx_bd_overrun; | |
1302 | if (ctrl & EMAC_RX_ST_BP) | |
1303 | ++st->rx_bd_bad_packet; | |
1304 | if (ctrl & EMAC_RX_ST_RP) | |
1305 | ++st->rx_bd_runt_packet; | |
1306 | if (ctrl & EMAC_RX_ST_SE) | |
1307 | ++st->rx_bd_short_event; | |
1308 | if (ctrl & EMAC_RX_ST_AE) | |
1309 | ++st->rx_bd_alignment_error; | |
1310 | if (ctrl & EMAC_RX_ST_BFCS) | |
1311 | ++st->rx_bd_bad_fcs; | |
1312 | if (ctrl & EMAC_RX_ST_PTL) | |
1313 | ++st->rx_bd_packet_too_long; | |
1314 | if (ctrl & EMAC_RX_ST_ORE) | |
1315 | ++st->rx_bd_out_of_range; | |
1316 | if (ctrl & EMAC_RX_ST_IRE) | |
1317 | ++st->rx_bd_in_range; | |
1318 | } | |
1319 | ||
1320 | static inline void emac_rx_csum(struct ocp_enet_private *dev, | |
1321 | struct sk_buff *skb, u16 ctrl) | |
1322 | { | |
1323 | #if defined(CONFIG_IBM_EMAC_TAH) | |
1324 | if (!ctrl && dev->tah_dev) { | |
1325 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1326 | ++dev->stats.rx_packets_csum; | |
1327 | } | |
1328 | #endif | |
1329 | } | |
1da177e4 | 1330 | |
37448f7d ES |
1331 | static inline int emac_rx_sg_append(struct ocp_enet_private *dev, int slot) |
1332 | { | |
1333 | if (likely(dev->rx_sg_skb != NULL)) { | |
1334 | int len = dev->rx_desc[slot].data_len; | |
1335 | int tot_len = dev->rx_sg_skb->len + len; | |
1336 | ||
1337 | if (unlikely(tot_len + 2 > dev->rx_skb_size)) { | |
1338 | ++dev->estats.rx_dropped_mtu; | |
1339 | dev_kfree_skb(dev->rx_sg_skb); | |
1340 | dev->rx_sg_skb = NULL; | |
1341 | } else { | |
1342 | cacheable_memcpy(dev->rx_sg_skb->tail, | |
1343 | dev->rx_skb[slot]->data, len); | |
1344 | skb_put(dev->rx_sg_skb, len); | |
1345 | emac_recycle_rx_skb(dev, slot, len); | |
1346 | return 0; | |
1da177e4 LT |
1347 | } |
1348 | } | |
37448f7d ES |
1349 | emac_recycle_rx_skb(dev, slot, 0); |
1350 | return -1; | |
1351 | } | |
1da177e4 | 1352 | |
37448f7d ES |
1353 | /* BHs disabled */ |
1354 | static int emac_poll_rx(void *param, int budget) | |
1355 | { | |
1356 | struct ocp_enet_private *dev = param; | |
1357 | int slot = dev->rx_slot, received = 0; | |
1358 | ||
1359 | DBG2("%d: poll_rx(%d)" NL, dev->def->index, budget); | |
1da177e4 | 1360 | |
37448f7d ES |
1361 | again: |
1362 | while (budget > 0) { | |
1363 | int len; | |
1364 | struct sk_buff *skb; | |
1365 | u16 ctrl = dev->rx_desc[slot].ctrl; | |
1366 | ||
1367 | if (ctrl & MAL_RX_CTRL_EMPTY) | |
1368 | break; | |
1da177e4 | 1369 | |
37448f7d ES |
1370 | skb = dev->rx_skb[slot]; |
1371 | barrier(); | |
1372 | len = dev->rx_desc[slot].data_len; | |
1da177e4 | 1373 | |
37448f7d ES |
1374 | if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) |
1375 | goto sg; | |
1da177e4 | 1376 | |
37448f7d ES |
1377 | ctrl &= EMAC_BAD_RX_MASK; |
1378 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { | |
1379 | emac_parse_rx_error(dev, ctrl); | |
1380 | ++dev->estats.rx_dropped_error; | |
1381 | emac_recycle_rx_skb(dev, slot, 0); | |
1382 | len = 0; | |
1383 | goto next; | |
1384 | } | |
1da177e4 | 1385 | |
37448f7d ES |
1386 | if (len && len < EMAC_RX_COPY_THRESH) { |
1387 | struct sk_buff *copy_skb = | |
1388 | alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); | |
1389 | if (unlikely(!copy_skb)) | |
1390 | goto oom; | |
1391 | ||
1392 | skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); | |
1393 | cacheable_memcpy(copy_skb->data - 2, skb->data - 2, | |
1394 | len + 2); | |
1395 | emac_recycle_rx_skb(dev, slot, len); | |
1396 | skb = copy_skb; | |
1397 | } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) | |
1398 | goto oom; | |
1399 | ||
1400 | skb_put(skb, len); | |
1401 | push_packet: | |
1402 | skb->dev = dev->ndev; | |
1403 | skb->protocol = eth_type_trans(skb, dev->ndev); | |
1404 | emac_rx_csum(dev, skb, ctrl); | |
1405 | ||
1406 | if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) | |
1407 | ++dev->estats.rx_dropped_stack; | |
1408 | next: | |
1409 | ++dev->stats.rx_packets; | |
1410 | skip: | |
1411 | dev->stats.rx_bytes += len; | |
1412 | slot = (slot + 1) % NUM_RX_BUFF; | |
1413 | --budget; | |
1414 | ++received; | |
1415 | continue; | |
1416 | sg: | |
1417 | if (ctrl & MAL_RX_CTRL_FIRST) { | |
1418 | BUG_ON(dev->rx_sg_skb); | |
1419 | if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { | |
1420 | DBG("%d: rx OOM %d" NL, dev->def->index, slot); | |
1421 | ++dev->estats.rx_dropped_oom; | |
1422 | emac_recycle_rx_skb(dev, slot, 0); | |
1423 | } else { | |
1424 | dev->rx_sg_skb = skb; | |
1425 | skb_put(skb, len); | |
1426 | } | |
1427 | } else if (!emac_rx_sg_append(dev, slot) && | |
1428 | (ctrl & MAL_RX_CTRL_LAST)) { | |
1429 | ||
1430 | skb = dev->rx_sg_skb; | |
1431 | dev->rx_sg_skb = NULL; | |
1432 | ||
1433 | ctrl &= EMAC_BAD_RX_MASK; | |
1434 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { | |
1435 | emac_parse_rx_error(dev, ctrl); | |
1436 | ++dev->estats.rx_dropped_error; | |
1437 | dev_kfree_skb(skb); | |
1438 | len = 0; | |
1439 | } else | |
1440 | goto push_packet; | |
1441 | } | |
1442 | goto skip; | |
1443 | oom: | |
1444 | DBG("%d: rx OOM %d" NL, dev->def->index, slot); | |
1445 | /* Drop the packet and recycle skb */ | |
1446 | ++dev->estats.rx_dropped_oom; | |
1447 | emac_recycle_rx_skb(dev, slot, 0); | |
1448 | goto next; | |
1449 | } | |
1da177e4 | 1450 | |
37448f7d ES |
1451 | if (received) { |
1452 | DBG2("%d: rx %d BDs" NL, dev->def->index, received); | |
1453 | dev->rx_slot = slot; | |
1454 | } | |
1da177e4 | 1455 | |
37448f7d ES |
1456 | if (unlikely(budget && dev->commac.rx_stopped)) { |
1457 | struct ocp_func_emac_data *emacdata = dev->def->additions; | |
1da177e4 | 1458 | |
37448f7d ES |
1459 | barrier(); |
1460 | if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { | |
1461 | DBG2("%d: rx restart" NL, dev->def->index); | |
1462 | received = 0; | |
1463 | goto again; | |
1464 | } | |
1da177e4 | 1465 | |
37448f7d ES |
1466 | if (dev->rx_sg_skb) { |
1467 | DBG2("%d: dropping partial rx packet" NL, | |
1468 | dev->def->index); | |
1469 | ++dev->estats.rx_dropped_error; | |
1470 | dev_kfree_skb(dev->rx_sg_skb); | |
1471 | dev->rx_sg_skb = NULL; | |
1472 | } | |
1da177e4 | 1473 | |
37448f7d ES |
1474 | dev->commac.rx_stopped = 0; |
1475 | mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan); | |
1476 | emac_rx_enable(dev); | |
1477 | dev->rx_slot = 0; | |
1478 | } | |
1479 | return received; | |
1da177e4 LT |
1480 | } |
1481 | ||
37448f7d ES |
1482 | /* BHs disabled */ |
1483 | static int emac_peek_rx(void *param) | |
1da177e4 | 1484 | { |
37448f7d ES |
1485 | struct ocp_enet_private *dev = param; |
1486 | return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); | |
1487 | } | |
1da177e4 | 1488 | |
37448f7d ES |
1489 | /* BHs disabled */ |
1490 | static int emac_peek_rx_sg(void *param) | |
1491 | { | |
1492 | struct ocp_enet_private *dev = param; | |
1493 | int slot = dev->rx_slot; | |
1494 | while (1) { | |
1495 | u16 ctrl = dev->rx_desc[slot].ctrl; | |
1496 | if (ctrl & MAL_RX_CTRL_EMPTY) | |
1497 | return 0; | |
1498 | else if (ctrl & MAL_RX_CTRL_LAST) | |
1499 | return 1; | |
1da177e4 | 1500 | |
37448f7d | 1501 | slot = (slot + 1) % NUM_RX_BUFF; |
1da177e4 | 1502 | |
37448f7d ES |
1503 | /* I'm just being paranoid here :) */ |
1504 | if (unlikely(slot == dev->rx_slot)) | |
1505 | return 0; | |
1506 | } | |
1da177e4 LT |
1507 | } |
1508 | ||
37448f7d ES |
1509 | /* Hard IRQ */ |
1510 | static void emac_rxde(void *param) | |
1da177e4 | 1511 | { |
37448f7d ES |
1512 | struct ocp_enet_private *dev = param; |
1513 | ++dev->estats.rx_stopped; | |
1514 | emac_rx_disable_async(dev); | |
1515 | } | |
1da177e4 | 1516 | |
37448f7d ES |
1517 | /* Hard IRQ */ |
1518 | static irqreturn_t emac_irq(int irq, void *dev_instance, struct pt_regs *regs) | |
1519 | { | |
1520 | struct ocp_enet_private *dev = dev_instance; | |
b43de2d8 | 1521 | struct emac_regs __iomem *p = dev->emacp; |
37448f7d ES |
1522 | struct ibm_emac_error_stats *st = &dev->estats; |
1523 | ||
1524 | u32 isr = in_be32(&p->isr); | |
1525 | out_be32(&p->isr, isr); | |
1526 | ||
1527 | DBG("%d: isr = %08x" NL, dev->def->index, isr); | |
1528 | ||
1529 | if (isr & EMAC_ISR_TXPE) | |
1530 | ++st->tx_parity; | |
1531 | if (isr & EMAC_ISR_RXPE) | |
1532 | ++st->rx_parity; | |
1533 | if (isr & EMAC_ISR_TXUE) | |
1534 | ++st->tx_underrun; | |
1535 | if (isr & EMAC_ISR_RXOE) | |
1536 | ++st->rx_fifo_overrun; | |
1537 | if (isr & EMAC_ISR_OVR) | |
1538 | ++st->rx_overrun; | |
1539 | if (isr & EMAC_ISR_BP) | |
1540 | ++st->rx_bad_packet; | |
1541 | if (isr & EMAC_ISR_RP) | |
1542 | ++st->rx_runt_packet; | |
1543 | if (isr & EMAC_ISR_SE) | |
1544 | ++st->rx_short_event; | |
1545 | if (isr & EMAC_ISR_ALE) | |
1546 | ++st->rx_alignment_error; | |
1547 | if (isr & EMAC_ISR_BFCS) | |
1548 | ++st->rx_bad_fcs; | |
1549 | if (isr & EMAC_ISR_PTLE) | |
1550 | ++st->rx_packet_too_long; | |
1551 | if (isr & EMAC_ISR_ORE) | |
1552 | ++st->rx_out_of_range; | |
1553 | if (isr & EMAC_ISR_IRE) | |
1554 | ++st->rx_in_range; | |
1555 | if (isr & EMAC_ISR_SQE) | |
1556 | ++st->tx_sqe; | |
1557 | if (isr & EMAC_ISR_TE) | |
1558 | ++st->tx_errors; | |
1da177e4 | 1559 | |
37448f7d ES |
1560 | return IRQ_HANDLED; |
1561 | } | |
1da177e4 | 1562 | |
37448f7d ES |
1563 | static struct net_device_stats *emac_stats(struct net_device *ndev) |
1564 | { | |
1565 | struct ocp_enet_private *dev = ndev->priv; | |
1566 | struct ibm_emac_stats *st = &dev->stats; | |
1567 | struct ibm_emac_error_stats *est = &dev->estats; | |
1568 | struct net_device_stats *nst = &dev->nstats; | |
1569 | ||
1570 | DBG2("%d: stats" NL, dev->def->index); | |
1571 | ||
1572 | /* Compute "legacy" statistics */ | |
1573 | local_irq_disable(); | |
1574 | nst->rx_packets = (unsigned long)st->rx_packets; | |
1575 | nst->rx_bytes = (unsigned long)st->rx_bytes; | |
1576 | nst->tx_packets = (unsigned long)st->tx_packets; | |
1577 | nst->tx_bytes = (unsigned long)st->tx_bytes; | |
1578 | nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + | |
1579 | est->rx_dropped_error + | |
1580 | est->rx_dropped_resize + | |
1581 | est->rx_dropped_mtu); | |
1582 | nst->tx_dropped = (unsigned long)est->tx_dropped; | |
1583 | ||
1584 | nst->rx_errors = (unsigned long)est->rx_bd_errors; | |
1585 | nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + | |
1586 | est->rx_fifo_overrun + | |
1587 | est->rx_overrun); | |
1588 | nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + | |
1589 | est->rx_alignment_error); | |
1590 | nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + | |
1591 | est->rx_bad_fcs); | |
1592 | nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + | |
1593 | est->rx_bd_short_event + | |
1594 | est->rx_bd_packet_too_long + | |
1595 | est->rx_bd_out_of_range + | |
1596 | est->rx_bd_in_range + | |
1597 | est->rx_runt_packet + | |
1598 | est->rx_short_event + | |
1599 | est->rx_packet_too_long + | |
1600 | est->rx_out_of_range + | |
1601 | est->rx_in_range); | |
1602 | ||
1603 | nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); | |
1604 | nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + | |
1605 | est->tx_underrun); | |
1606 | nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; | |
1607 | nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + | |
1608 | est->tx_bd_excessive_collisions + | |
1609 | est->tx_bd_late_collision + | |
1610 | est->tx_bd_multple_collisions); | |
1611 | local_irq_enable(); | |
1612 | return nst; | |
1da177e4 LT |
1613 | } |
1614 | ||
37448f7d | 1615 | static void emac_remove(struct ocp_device *ocpdev) |
1da177e4 | 1616 | { |
37448f7d | 1617 | struct ocp_enet_private *dev = ocp_get_drvdata(ocpdev); |
1da177e4 | 1618 | |
37448f7d | 1619 | DBG("%d: remove" NL, dev->def->index); |
1da177e4 | 1620 | |
b43de2d8 | 1621 | ocp_set_drvdata(ocpdev, NULL); |
37448f7d | 1622 | unregister_netdev(dev->ndev); |
1da177e4 | 1623 | |
37448f7d ES |
1624 | tah_fini(dev->tah_dev); |
1625 | rgmii_fini(dev->rgmii_dev, dev->rgmii_input); | |
1626 | zmii_fini(dev->zmii_dev, dev->zmii_input); | |
1da177e4 | 1627 | |
b43de2d8 | 1628 | emac_dbg_register(dev->def->index, NULL); |
37448f7d ES |
1629 | |
1630 | mal_unregister_commac(dev->mal, &dev->commac); | |
b43de2d8 | 1631 | iounmap(dev->emacp); |
37448f7d | 1632 | kfree(dev->ndev); |
1da177e4 LT |
1633 | } |
1634 | ||
37448f7d ES |
1635 | static struct mal_commac_ops emac_commac_ops = { |
1636 | .poll_tx = &emac_poll_tx, | |
1637 | .poll_rx = &emac_poll_rx, | |
1638 | .peek_rx = &emac_peek_rx, | |
1639 | .rxde = &emac_rxde, | |
1640 | }; | |
1da177e4 | 1641 | |
37448f7d ES |
1642 | static struct mal_commac_ops emac_commac_sg_ops = { |
1643 | .poll_tx = &emac_poll_tx, | |
1644 | .poll_rx = &emac_poll_rx, | |
1645 | .peek_rx = &emac_peek_rx_sg, | |
1646 | .rxde = &emac_rxde, | |
1647 | }; | |
1da177e4 | 1648 | |
37448f7d ES |
1649 | /* Ethtool support */ |
1650 | static int emac_ethtool_get_settings(struct net_device *ndev, | |
1651 | struct ethtool_cmd *cmd) | |
1da177e4 | 1652 | { |
37448f7d | 1653 | struct ocp_enet_private *dev = ndev->priv; |
1da177e4 | 1654 | |
37448f7d | 1655 | cmd->supported = dev->phy.features; |
1da177e4 | 1656 | cmd->port = PORT_MII; |
37448f7d ES |
1657 | cmd->phy_address = dev->phy.address; |
1658 | cmd->transceiver = | |
1659 | dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL; | |
1660 | ||
1661 | local_bh_disable(); | |
1662 | cmd->advertising = dev->phy.advertising; | |
1663 | cmd->autoneg = dev->phy.autoneg; | |
1664 | cmd->speed = dev->phy.speed; | |
1665 | cmd->duplex = dev->phy.duplex; | |
1666 | local_bh_enable(); | |
1667 | ||
1da177e4 LT |
1668 | return 0; |
1669 | } | |
1670 | ||
37448f7d ES |
1671 | static int emac_ethtool_set_settings(struct net_device *ndev, |
1672 | struct ethtool_cmd *cmd) | |
1da177e4 | 1673 | { |
37448f7d ES |
1674 | struct ocp_enet_private *dev = ndev->priv; |
1675 | u32 f = dev->phy.features; | |
1da177e4 | 1676 | |
37448f7d ES |
1677 | DBG("%d: set_settings(%d, %d, %d, 0x%08x)" NL, dev->def->index, |
1678 | cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising); | |
1da177e4 | 1679 | |
37448f7d ES |
1680 | /* Basic sanity checks */ |
1681 | if (dev->phy.address < 0) | |
1682 | return -EOPNOTSUPP; | |
1da177e4 LT |
1683 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) |
1684 | return -EINVAL; | |
1685 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
1686 | return -EINVAL; | |
1687 | if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) | |
1688 | return -EINVAL; | |
37448f7d ES |
1689 | |
1690 | if (cmd->autoneg == AUTONEG_DISABLE) { | |
1da177e4 LT |
1691 | switch (cmd->speed) { |
1692 | case SPEED_10: | |
37448f7d ES |
1693 | if (cmd->duplex == DUPLEX_HALF |
1694 | && !(f & SUPPORTED_10baseT_Half)) | |
1da177e4 | 1695 | return -EINVAL; |
37448f7d ES |
1696 | if (cmd->duplex == DUPLEX_FULL |
1697 | && !(f & SUPPORTED_10baseT_Full)) | |
1da177e4 LT |
1698 | return -EINVAL; |
1699 | break; | |
1700 | case SPEED_100: | |
37448f7d ES |
1701 | if (cmd->duplex == DUPLEX_HALF |
1702 | && !(f & SUPPORTED_100baseT_Half)) | |
1da177e4 | 1703 | return -EINVAL; |
37448f7d ES |
1704 | if (cmd->duplex == DUPLEX_FULL |
1705 | && !(f & SUPPORTED_100baseT_Full)) | |
1da177e4 LT |
1706 | return -EINVAL; |
1707 | break; | |
1708 | case SPEED_1000: | |
37448f7d ES |
1709 | if (cmd->duplex == DUPLEX_HALF |
1710 | && !(f & SUPPORTED_1000baseT_Half)) | |
1da177e4 | 1711 | return -EINVAL; |
37448f7d ES |
1712 | if (cmd->duplex == DUPLEX_FULL |
1713 | && !(f & SUPPORTED_1000baseT_Full)) | |
1da177e4 LT |
1714 | return -EINVAL; |
1715 | break; | |
1716 | default: | |
1717 | return -EINVAL; | |
37448f7d ES |
1718 | } |
1719 | ||
1720 | local_bh_disable(); | |
1721 | dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed, | |
1722 | cmd->duplex); | |
1723 | ||
1724 | } else { | |
1725 | if (!(f & SUPPORTED_Autoneg)) | |
1726 | return -EINVAL; | |
1727 | ||
1728 | local_bh_disable(); | |
1729 | dev->phy.def->ops->setup_aneg(&dev->phy, | |
1730 | (cmd->advertising & f) | | |
1731 | (dev->phy.advertising & | |
1732 | (ADVERTISED_Pause | | |
1733 | ADVERTISED_Asym_Pause))); | |
1734 | } | |
1735 | emac_force_link_update(dev); | |
1736 | local_bh_enable(); | |
1737 | ||
1da177e4 LT |
1738 | return 0; |
1739 | } | |
1740 | ||
37448f7d ES |
1741 | static void emac_ethtool_get_ringparam(struct net_device *ndev, |
1742 | struct ethtool_ringparam *rp) | |
1da177e4 | 1743 | { |
37448f7d ES |
1744 | rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; |
1745 | rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; | |
1da177e4 LT |
1746 | } |
1747 | ||
37448f7d ES |
1748 | static void emac_ethtool_get_pauseparam(struct net_device *ndev, |
1749 | struct ethtool_pauseparam *pp) | |
1da177e4 | 1750 | { |
37448f7d ES |
1751 | struct ocp_enet_private *dev = ndev->priv; |
1752 | ||
1753 | local_bh_disable(); | |
1754 | if ((dev->phy.features & SUPPORTED_Autoneg) && | |
1755 | (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) | |
1756 | pp->autoneg = 1; | |
1757 | ||
1758 | if (dev->phy.duplex == DUPLEX_FULL) { | |
1759 | if (dev->phy.pause) | |
1760 | pp->rx_pause = pp->tx_pause = 1; | |
1761 | else if (dev->phy.asym_pause) | |
1762 | pp->tx_pause = 1; | |
1763 | } | |
1764 | local_bh_enable(); | |
1765 | } | |
1da177e4 | 1766 | |
37448f7d ES |
1767 | static u32 emac_ethtool_get_rx_csum(struct net_device *ndev) |
1768 | { | |
1769 | struct ocp_enet_private *dev = ndev->priv; | |
1770 | return dev->tah_dev != 0; | |
1da177e4 LT |
1771 | } |
1772 | ||
37448f7d | 1773 | static int emac_get_regs_len(struct ocp_enet_private *dev) |
1da177e4 | 1774 | { |
37448f7d | 1775 | return sizeof(struct emac_ethtool_regs_subhdr) + EMAC_ETHTOOL_REGS_SIZE; |
1da177e4 LT |
1776 | } |
1777 | ||
37448f7d ES |
1778 | static int emac_ethtool_get_regs_len(struct net_device *ndev) |
1779 | { | |
1780 | struct ocp_enet_private *dev = ndev->priv; | |
1781 | return sizeof(struct emac_ethtool_regs_hdr) + | |
1782 | emac_get_regs_len(dev) + mal_get_regs_len(dev->mal) + | |
1783 | zmii_get_regs_len(dev->zmii_dev) + | |
1784 | rgmii_get_regs_len(dev->rgmii_dev) + | |
1785 | tah_get_regs_len(dev->tah_dev); | |
1786 | } | |
1da177e4 | 1787 | |
37448f7d | 1788 | static void *emac_dump_regs(struct ocp_enet_private *dev, void *buf) |
1da177e4 | 1789 | { |
37448f7d | 1790 | struct emac_ethtool_regs_subhdr *hdr = buf; |
1da177e4 | 1791 | |
37448f7d ES |
1792 | hdr->version = EMAC_ETHTOOL_REGS_VER; |
1793 | hdr->index = dev->def->index; | |
1794 | memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE); | |
1795 | return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE); | |
1796 | } | |
1da177e4 | 1797 | |
37448f7d ES |
1798 | static void emac_ethtool_get_regs(struct net_device *ndev, |
1799 | struct ethtool_regs *regs, void *buf) | |
1800 | { | |
1801 | struct ocp_enet_private *dev = ndev->priv; | |
1802 | struct emac_ethtool_regs_hdr *hdr = buf; | |
1803 | ||
1804 | hdr->components = 0; | |
1805 | buf = hdr + 1; | |
1806 | ||
1807 | local_irq_disable(); | |
1808 | buf = mal_dump_regs(dev->mal, buf); | |
1809 | buf = emac_dump_regs(dev, buf); | |
1810 | if (dev->zmii_dev) { | |
1811 | hdr->components |= EMAC_ETHTOOL_REGS_ZMII; | |
1812 | buf = zmii_dump_regs(dev->zmii_dev, buf); | |
1813 | } | |
1814 | if (dev->rgmii_dev) { | |
1815 | hdr->components |= EMAC_ETHTOOL_REGS_RGMII; | |
1816 | buf = rgmii_dump_regs(dev->rgmii_dev, buf); | |
1da177e4 | 1817 | } |
37448f7d ES |
1818 | if (dev->tah_dev) { |
1819 | hdr->components |= EMAC_ETHTOOL_REGS_TAH; | |
1820 | buf = tah_dump_regs(dev->tah_dev, buf); | |
1821 | } | |
1822 | local_irq_enable(); | |
1da177e4 LT |
1823 | } |
1824 | ||
37448f7d | 1825 | static int emac_ethtool_nway_reset(struct net_device *ndev) |
1da177e4 | 1826 | { |
37448f7d ES |
1827 | struct ocp_enet_private *dev = ndev->priv; |
1828 | int res = 0; | |
1da177e4 | 1829 | |
37448f7d | 1830 | DBG("%d: nway_reset" NL, dev->def->index); |
1da177e4 | 1831 | |
37448f7d ES |
1832 | if (dev->phy.address < 0) |
1833 | return -EOPNOTSUPP; | |
1da177e4 | 1834 | |
37448f7d ES |
1835 | local_bh_disable(); |
1836 | if (!dev->phy.autoneg) { | |
1837 | res = -EINVAL; | |
1838 | goto out; | |
1839 | } | |
1da177e4 | 1840 | |
37448f7d ES |
1841 | dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); |
1842 | emac_force_link_update(dev); | |
1da177e4 | 1843 | |
37448f7d ES |
1844 | out: |
1845 | local_bh_enable(); | |
1846 | return res; | |
1847 | } | |
1da177e4 | 1848 | |
37448f7d ES |
1849 | static int emac_ethtool_get_stats_count(struct net_device *ndev) |
1850 | { | |
1851 | return EMAC_ETHTOOL_STATS_COUNT; | |
1da177e4 LT |
1852 | } |
1853 | ||
37448f7d ES |
1854 | static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, |
1855 | u8 * buf) | |
1da177e4 | 1856 | { |
37448f7d ES |
1857 | if (stringset == ETH_SS_STATS) |
1858 | memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); | |
1859 | } | |
1da177e4 | 1860 | |
37448f7d ES |
1861 | static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, |
1862 | struct ethtool_stats *estats, | |
1863 | u64 * tmp_stats) | |
1864 | { | |
1865 | struct ocp_enet_private *dev = ndev->priv; | |
1866 | local_irq_disable(); | |
1867 | memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); | |
1868 | tmp_stats += sizeof(dev->stats) / sizeof(u64); | |
1869 | memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); | |
1870 | local_irq_enable(); | |
1871 | } | |
1da177e4 | 1872 | |
37448f7d ES |
1873 | static void emac_ethtool_get_drvinfo(struct net_device *ndev, |
1874 | struct ethtool_drvinfo *info) | |
1875 | { | |
1876 | struct ocp_enet_private *dev = ndev->priv; | |
1da177e4 | 1877 | |
37448f7d ES |
1878 | strcpy(info->driver, "ibm_emac"); |
1879 | strcpy(info->version, DRV_VERSION); | |
1880 | info->fw_version[0] = '\0'; | |
1881 | sprintf(info->bus_info, "PPC 4xx EMAC %d", dev->def->index); | |
1882 | info->n_stats = emac_ethtool_get_stats_count(ndev); | |
1883 | info->regdump_len = emac_ethtool_get_regs_len(ndev); | |
1884 | } | |
1da177e4 | 1885 | |
37448f7d ES |
1886 | static struct ethtool_ops emac_ethtool_ops = { |
1887 | .get_settings = emac_ethtool_get_settings, | |
1888 | .set_settings = emac_ethtool_set_settings, | |
1889 | .get_drvinfo = emac_ethtool_get_drvinfo, | |
1da177e4 | 1890 | |
37448f7d ES |
1891 | .get_regs_len = emac_ethtool_get_regs_len, |
1892 | .get_regs = emac_ethtool_get_regs, | |
1da177e4 | 1893 | |
37448f7d | 1894 | .nway_reset = emac_ethtool_nway_reset, |
1da177e4 | 1895 | |
37448f7d ES |
1896 | .get_ringparam = emac_ethtool_get_ringparam, |
1897 | .get_pauseparam = emac_ethtool_get_pauseparam, | |
1898 | ||
1899 | .get_rx_csum = emac_ethtool_get_rx_csum, | |
1900 | ||
1901 | .get_strings = emac_ethtool_get_strings, | |
1902 | .get_stats_count = emac_ethtool_get_stats_count, | |
1903 | .get_ethtool_stats = emac_ethtool_get_ethtool_stats, | |
1904 | ||
1905 | .get_link = ethtool_op_get_link, | |
1906 | .get_tx_csum = ethtool_op_get_tx_csum, | |
1907 | .get_sg = ethtool_op_get_sg, | |
1da177e4 LT |
1908 | }; |
1909 | ||
37448f7d | 1910 | static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) |
1da177e4 | 1911 | { |
37448f7d ES |
1912 | struct ocp_enet_private *dev = ndev->priv; |
1913 | uint16_t *data = (uint16_t *) & rq->ifr_ifru; | |
1914 | ||
1915 | DBG("%d: ioctl %08x" NL, dev->def->index, cmd); | |
1916 | ||
1917 | if (dev->phy.address < 0) | |
1918 | return -EOPNOTSUPP; | |
1919 | ||
1920 | switch (cmd) { | |
1921 | case SIOCGMIIPHY: | |
1922 | case SIOCDEVPRIVATE: | |
1923 | data[0] = dev->phy.address; | |
1924 | /* Fall through */ | |
1925 | case SIOCGMIIREG: | |
1926 | case SIOCDEVPRIVATE + 1: | |
1927 | data[3] = emac_mdio_read(ndev, dev->phy.address, data[1]); | |
1928 | return 0; | |
1929 | ||
1930 | case SIOCSMIIREG: | |
1931 | case SIOCDEVPRIVATE + 2: | |
1932 | if (!capable(CAP_NET_ADMIN)) | |
1933 | return -EPERM; | |
1934 | emac_mdio_write(ndev, dev->phy.address, data[1], data[2]); | |
1935 | return 0; | |
1936 | default: | |
1937 | return -EOPNOTSUPP; | |
1938 | } | |
1da177e4 | 1939 | } |
1da177e4 | 1940 | |
37448f7d | 1941 | static int __init emac_probe(struct ocp_device *ocpdev) |
1da177e4 | 1942 | { |
37448f7d | 1943 | struct ocp_func_emac_data *emacdata = ocpdev->def->additions; |
1da177e4 | 1944 | struct net_device *ndev; |
37448f7d ES |
1945 | struct ocp_device *maldev; |
1946 | struct ocp_enet_private *dev; | |
1947 | int err, i; | |
1948 | ||
1949 | DBG("%d: probe" NL, ocpdev->def->index); | |
1da177e4 | 1950 | |
1da177e4 LT |
1951 | if (!emacdata) { |
1952 | printk(KERN_ERR "emac%d: Missing additional data!\n", | |
1953 | ocpdev->def->index); | |
1954 | return -ENODEV; | |
1955 | } | |
1956 | ||
1957 | /* Allocate our net_device structure */ | |
1958 | ndev = alloc_etherdev(sizeof(struct ocp_enet_private)); | |
37448f7d ES |
1959 | if (!ndev) { |
1960 | printk(KERN_ERR "emac%d: could not allocate ethernet device!\n", | |
1da177e4 LT |
1961 | ocpdev->def->index); |
1962 | return -ENOMEM; | |
1963 | } | |
37448f7d ES |
1964 | dev = ndev->priv; |
1965 | dev->ndev = ndev; | |
1966 | dev->ldev = &ocpdev->dev; | |
1967 | dev->def = ocpdev->def; | |
1968 | SET_MODULE_OWNER(ndev); | |
1da177e4 | 1969 | |
37448f7d ES |
1970 | /* Find MAL device we are connected to */ |
1971 | maldev = | |
1972 | ocp_find_device(OCP_VENDOR_IBM, OCP_FUNC_MAL, emacdata->mal_idx); | |
1973 | if (!maldev) { | |
1974 | printk(KERN_ERR "emac%d: unknown mal%d device!\n", | |
1975 | dev->def->index, emacdata->mal_idx); | |
1976 | err = -ENODEV; | |
1977 | goto out; | |
1978 | } | |
1979 | dev->mal = ocp_get_drvdata(maldev); | |
1980 | if (!dev->mal) { | |
1981 | printk(KERN_ERR "emac%d: mal%d hasn't been initialized yet!\n", | |
1982 | dev->def->index, emacdata->mal_idx); | |
1983 | err = -ENODEV; | |
1984 | goto out; | |
1da177e4 LT |
1985 | } |
1986 | ||
37448f7d ES |
1987 | /* Register with MAL */ |
1988 | dev->commac.ops = &emac_commac_ops; | |
1989 | dev->commac.dev = dev; | |
1990 | dev->commac.tx_chan_mask = MAL_CHAN_MASK(emacdata->mal_tx_chan); | |
1991 | dev->commac.rx_chan_mask = MAL_CHAN_MASK(emacdata->mal_rx_chan); | |
1992 | err = mal_register_commac(dev->mal, &dev->commac); | |
1993 | if (err) { | |
1994 | printk(KERN_ERR "emac%d: failed to register with mal%d!\n", | |
1995 | dev->def->index, emacdata->mal_idx); | |
1996 | goto out; | |
1997 | } | |
1998 | dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); | |
1999 | dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); | |
2000 | ||
2001 | /* Get pointers to BD rings */ | |
2002 | dev->tx_desc = | |
2003 | dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, | |
2004 | emacdata->mal_tx_chan); | |
2005 | dev->rx_desc = | |
2006 | dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, | |
2007 | emacdata->mal_rx_chan); | |
2008 | ||
2009 | DBG("%d: tx_desc %p" NL, ocpdev->def->index, dev->tx_desc); | |
2010 | DBG("%d: rx_desc %p" NL, ocpdev->def->index, dev->rx_desc); | |
2011 | ||
2012 | /* Clean rings */ | |
2013 | memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); | |
2014 | memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); | |
2015 | ||
2016 | /* If we depend on another EMAC for MDIO, check whether it was probed already */ | |
2017 | if (emacdata->mdio_idx >= 0 && emacdata->mdio_idx != ocpdev->def->index) { | |
2018 | struct ocp_device *mdiodev = | |
2019 | ocp_find_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, | |
2020 | emacdata->mdio_idx); | |
2021 | if (!mdiodev) { | |
2022 | printk(KERN_ERR "emac%d: unknown emac%d device!\n", | |
2023 | dev->def->index, emacdata->mdio_idx); | |
2024 | err = -ENODEV; | |
2025 | goto out2; | |
2026 | } | |
2027 | dev->mdio_dev = ocp_get_drvdata(mdiodev); | |
2028 | if (!dev->mdio_dev) { | |
2029 | printk(KERN_ERR | |
2030 | "emac%d: emac%d hasn't been initialized yet!\n", | |
2031 | dev->def->index, emacdata->mdio_idx); | |
2032 | err = -ENODEV; | |
2033 | goto out2; | |
2034 | } | |
1da177e4 LT |
2035 | } |
2036 | ||
37448f7d ES |
2037 | /* Attach to ZMII, if needed */ |
2038 | if ((err = zmii_attach(dev)) != 0) | |
2039 | goto out2; | |
2040 | ||
2041 | /* Attach to RGMII, if needed */ | |
2042 | if ((err = rgmii_attach(dev)) != 0) | |
2043 | goto out3; | |
2044 | ||
2045 | /* Attach to TAH, if needed */ | |
2046 | if ((err = tah_attach(dev)) != 0) | |
2047 | goto out4; | |
2048 | ||
2049 | /* Map EMAC regs */ | |
b43de2d8 | 2050 | dev->emacp = ioremap(dev->def->paddr, sizeof(struct emac_regs)); |
37448f7d ES |
2051 | if (!dev->emacp) { |
2052 | printk(KERN_ERR "emac%d: could not ioremap device registers!\n", | |
2053 | dev->def->index); | |
2054 | err = -ENOMEM; | |
2055 | goto out5; | |
1da177e4 LT |
2056 | } |
2057 | ||
37448f7d ES |
2058 | /* Fill in MAC address */ |
2059 | for (i = 0; i < 6; ++i) | |
2060 | ndev->dev_addr[i] = emacdata->mac_addr[i]; | |
1da177e4 | 2061 | |
37448f7d ES |
2062 | /* Set some link defaults before we can find out real parameters */ |
2063 | dev->phy.speed = SPEED_100; | |
2064 | dev->phy.duplex = DUPLEX_FULL; | |
2065 | dev->phy.autoneg = AUTONEG_DISABLE; | |
2066 | dev->phy.pause = dev->phy.asym_pause = 0; | |
8169bd91 | 2067 | dev->stop_timeout = STOP_TIMEOUT_100; |
37448f7d ES |
2068 | init_timer(&dev->link_timer); |
2069 | dev->link_timer.function = emac_link_timer; | |
2070 | dev->link_timer.data = (unsigned long)dev; | |
2071 | ||
2072 | /* Find PHY if any */ | |
2073 | dev->phy.dev = ndev; | |
2074 | dev->phy.mode = emacdata->phy_mode; | |
2075 | if (emacdata->phy_map != 0xffffffff) { | |
2076 | u32 phy_map = emacdata->phy_map | busy_phy_map; | |
2077 | u32 adv; | |
2078 | ||
2079 | DBG("%d: PHY maps %08x %08x" NL, dev->def->index, | |
2080 | emacdata->phy_map, busy_phy_map); | |
2081 | ||
2082 | EMAC_RX_CLK_TX(dev->def->index); | |
2083 | ||
2084 | dev->phy.mdio_read = emac_mdio_read; | |
2085 | dev->phy.mdio_write = emac_mdio_write; | |
2086 | ||
2087 | /* Configure EMAC with defaults so we can at least use MDIO | |
2088 | * This is needed mostly for 440GX | |
2089 | */ | |
2090 | if (emac_phy_gpcs(dev->phy.mode)) { | |
2091 | /* XXX | |
2092 | * Make GPCS PHY address equal to EMAC index. | |
2093 | * We probably should take into account busy_phy_map | |
2094 | * and/or phy_map here. | |
2095 | */ | |
2096 | dev->phy.address = dev->def->index; | |
1da177e4 | 2097 | } |
37448f7d ES |
2098 | |
2099 | emac_configure(dev); | |
2100 | ||
2101 | for (i = 0; i < 0x20; phy_map >>= 1, ++i) | |
2102 | if (!(phy_map & 1)) { | |
2103 | int r; | |
2104 | busy_phy_map |= 1 << i; | |
1da177e4 | 2105 | |
37448f7d ES |
2106 | /* Quick check if there is a PHY at the address */ |
2107 | r = emac_mdio_read(dev->ndev, i, MII_BMCR); | |
2108 | if (r == 0xffff || r < 0) | |
2109 | continue; | |
2110 | if (!mii_phy_probe(&dev->phy, i)) | |
2111 | break; | |
2112 | } | |
2113 | if (i == 0x20) { | |
2114 | printk(KERN_WARNING "emac%d: can't find PHY!\n", | |
2115 | dev->def->index); | |
2116 | goto out6; | |
1da177e4 | 2117 | } |
1da177e4 | 2118 | |
37448f7d ES |
2119 | /* Init PHY */ |
2120 | if (dev->phy.def->ops->init) | |
2121 | dev->phy.def->ops->init(&dev->phy); | |
49a9db07 | 2122 | |
37448f7d ES |
2123 | /* Disable any PHY features not supported by the platform */ |
2124 | dev->phy.def->features &= ~emacdata->phy_feat_exc; | |
2125 | ||
2126 | /* Setup initial link parameters */ | |
2127 | if (dev->phy.features & SUPPORTED_Autoneg) { | |
2128 | adv = dev->phy.features; | |
2129 | #if !defined(CONFIG_40x) | |
2130 | adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; | |
2131 | #endif | |
2132 | /* Restart autonegotiation */ | |
2133 | dev->phy.def->ops->setup_aneg(&dev->phy, adv); | |
49a9db07 | 2134 | } else { |
37448f7d ES |
2135 | u32 f = dev->phy.def->features; |
2136 | int speed = SPEED_10, fd = DUPLEX_HALF; | |
2137 | ||
2138 | /* Select highest supported speed/duplex */ | |
2139 | if (f & SUPPORTED_1000baseT_Full) { | |
2140 | speed = SPEED_1000; | |
2141 | fd = DUPLEX_FULL; | |
2142 | } else if (f & SUPPORTED_1000baseT_Half) | |
2143 | speed = SPEED_1000; | |
2144 | else if (f & SUPPORTED_100baseT_Full) { | |
2145 | speed = SPEED_100; | |
2146 | fd = DUPLEX_FULL; | |
2147 | } else if (f & SUPPORTED_100baseT_Half) | |
2148 | speed = SPEED_100; | |
2149 | else if (f & SUPPORTED_10baseT_Full) | |
2150 | fd = DUPLEX_FULL; | |
2151 | ||
2152 | /* Force link parameters */ | |
2153 | dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); | |
49a9db07 | 2154 | } |
37448f7d ES |
2155 | } else { |
2156 | emac_reset(dev); | |
1da177e4 | 2157 | |
37448f7d ES |
2158 | /* PHY-less configuration. |
2159 | * XXX I probably should move these settings to emacdata | |
2160 | */ | |
2161 | dev->phy.address = -1; | |
2162 | dev->phy.features = SUPPORTED_100baseT_Full | SUPPORTED_MII; | |
2163 | dev->phy.pause = 1; | |
2164 | } | |
1da177e4 LT |
2165 | |
2166 | /* Fill in the driver function table */ | |
2167 | ndev->open = &emac_open; | |
37448f7d ES |
2168 | if (dev->tah_dev) { |
2169 | ndev->hard_start_xmit = &emac_start_xmit_sg; | |
2170 | ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; | |
2171 | } else | |
2172 | ndev->hard_start_xmit = &emac_start_xmit; | |
2173 | ndev->tx_timeout = &emac_full_tx_reset; | |
2174 | ndev->watchdog_timeo = 5 * HZ; | |
1da177e4 LT |
2175 | ndev->stop = &emac_close; |
2176 | ndev->get_stats = &emac_stats; | |
1da177e4 LT |
2177 | ndev->set_multicast_list = &emac_set_multicast_list; |
2178 | ndev->do_ioctl = &emac_ioctl; | |
37448f7d ES |
2179 | if (emac_phy_supports_gige(emacdata->phy_mode)) { |
2180 | ndev->change_mtu = &emac_change_mtu; | |
2181 | dev->commac.ops = &emac_commac_sg_ops; | |
2182 | } | |
1da177e4 | 2183 | SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops); |
1da177e4 | 2184 | |
37448f7d ES |
2185 | netif_carrier_off(ndev); |
2186 | netif_stop_queue(ndev); | |
2187 | ||
2188 | err = register_netdev(ndev); | |
2189 | if (err) { | |
2190 | printk(KERN_ERR "emac%d: failed to register net device (%d)!\n", | |
2191 | dev->def->index, err); | |
2192 | goto out6; | |
2193 | } | |
1da177e4 | 2194 | |
37448f7d | 2195 | ocp_set_drvdata(ocpdev, dev); |
1da177e4 | 2196 | |
37448f7d ES |
2197 | printk("%s: emac%d, MAC %02x:%02x:%02x:%02x:%02x:%02x\n", |
2198 | ndev->name, dev->def->index, | |
1da177e4 LT |
2199 | ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2], |
2200 | ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]); | |
1da177e4 | 2201 | |
37448f7d ES |
2202 | if (dev->phy.address >= 0) |
2203 | printk("%s: found %s PHY (0x%02x)\n", ndev->name, | |
2204 | dev->phy.def->name, dev->phy.address); | |
1da177e4 | 2205 | |
37448f7d | 2206 | emac_dbg_register(dev->def->index, dev); |
1da177e4 LT |
2207 | |
2208 | return 0; | |
37448f7d | 2209 | out6: |
b43de2d8 | 2210 | iounmap(dev->emacp); |
37448f7d ES |
2211 | out5: |
2212 | tah_fini(dev->tah_dev); | |
2213 | out4: | |
2214 | rgmii_fini(dev->rgmii_dev, dev->rgmii_input); | |
2215 | out3: | |
2216 | zmii_fini(dev->zmii_dev, dev->zmii_input); | |
2217 | out2: | |
2218 | mal_unregister_commac(dev->mal, &dev->commac); | |
2219 | out: | |
2220 | kfree(ndev); | |
2221 | return err; | |
1da177e4 LT |
2222 | } |
2223 | ||
1da177e4 | 2224 | static struct ocp_device_id emac_ids[] = { |
37448f7d ES |
2225 | { .vendor = OCP_VENDOR_IBM, .function = OCP_FUNC_EMAC }, |
2226 | { .vendor = OCP_VENDOR_INVALID} | |
1da177e4 LT |
2227 | }; |
2228 | ||
2229 | static struct ocp_driver emac_driver = { | |
2230 | .name = "emac", | |
2231 | .id_table = emac_ids, | |
1da177e4 LT |
2232 | .probe = emac_probe, |
2233 | .remove = emac_remove, | |
2234 | }; | |
2235 | ||
2236 | static int __init emac_init(void) | |
2237 | { | |
37448f7d ES |
2238 | printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); |
2239 | ||
2240 | DBG(": init" NL); | |
1da177e4 | 2241 | |
37448f7d ES |
2242 | if (mal_init()) |
2243 | return -ENODEV; | |
2244 | ||
2245 | EMAC_CLK_INTERNAL; | |
2246 | if (ocp_register_driver(&emac_driver)) { | |
2247 | EMAC_CLK_EXTERNAL; | |
2248 | ocp_unregister_driver(&emac_driver); | |
2249 | mal_exit(); | |
2250 | return -ENODEV; | |
1da177e4 | 2251 | } |
37448f7d | 2252 | EMAC_CLK_EXTERNAL; |
1da177e4 | 2253 | |
37448f7d ES |
2254 | emac_init_debug(); |
2255 | return 0; | |
1da177e4 LT |
2256 | } |
2257 | ||
2258 | static void __exit emac_exit(void) | |
2259 | { | |
37448f7d | 2260 | DBG(": exit" NL); |
1da177e4 | 2261 | ocp_unregister_driver(&emac_driver); |
37448f7d ES |
2262 | mal_exit(); |
2263 | emac_fini_debug(); | |
1da177e4 LT |
2264 | } |
2265 | ||
2266 | module_init(emac_init); | |
2267 | module_exit(emac_exit); |