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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * drivers/net/ethernet/ibm/emac/core.h
4 *
5 * Driver for PowerPC 4xx on-chip ethernet controller.
6 *
7 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
8 * <benh@kernel.crashing.org>
9 *
10 * Based on the arch/ppc version of the driver:
11 *
12 * Copyright (c) 2004, 2005 Zultys Technologies.
13 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
14 *
15 * Based on original work by
16 * Armin Kuster <akuster@mvista.com>
17 * Johnnie Peters <jpeters@mvista.com>
18 * Copyright 2000, 2001 MontaVista Softare Inc.
19 */
20#ifndef __IBM_NEWEMAC_CORE_H
21#define __IBM_NEWEMAC_CORE_H
22
23#include <linux/module.h>
24#include <linux/list.h>
25#include <linux/kernel.h>
26#include <linux/interrupt.h>
27#include <linux/netdevice.h>
28#include <linux/dma-mapping.h>
29#include <linux/spinlock.h>
30#include <linux/slab.h>
31
32#include <asm/io.h>
33#include <asm/dcr.h>
34
35#include "emac.h"
36#include "phy.h"
37#include "zmii.h"
38#include "rgmii.h"
39#include "mal.h"
40#include "tah.h"
41#include "debug.h"
42
43#define NUM_TX_BUFF CONFIG_IBM_EMAC_TXB
44#define NUM_RX_BUFF CONFIG_IBM_EMAC_RXB
45
46/* Simple sanity check */
47#if NUM_TX_BUFF > 256 || NUM_RX_BUFF > 256
48#error Invalid number of buffer descriptors (greater than 256)
49#endif
50
51#define EMAC_MIN_MTU 46
52
53/* Maximum L2 header length (VLAN tagged, no FCS) */
54#define EMAC_MTU_OVERHEAD (6 * 2 + 2 + 4)
55
56/* RX BD size for the given MTU */
57static inline int emac_rx_size(int mtu)
58{
59 if (mtu > ETH_DATA_LEN)
60 return MAL_MAX_RX_SIZE;
61 else
62 return mal_rx_size(ETH_DATA_LEN + EMAC_MTU_OVERHEAD);
63}
64
65/* Size of RX skb for the given MTU */
66static inline int emac_rx_skb_size(int mtu)
67{
68 int size = max(mtu + EMAC_MTU_OVERHEAD, emac_rx_size(mtu));
69
70 return SKB_DATA_ALIGN(size + NET_IP_ALIGN) + NET_SKB_PAD;
71}
72
73/* RX DMA sync size */
74static inline int emac_rx_sync_size(int mtu)
75{
76 return SKB_DATA_ALIGN(emac_rx_size(mtu) + NET_IP_ALIGN);
77}
78
79/* Driver statistcs is split into two parts to make it more cache friendly:
80 * - normal statistics (packet count, etc)
81 * - error statistics
82 *
83 * When statistics is requested by ethtool, these parts are concatenated,
84 * normal one goes first.
85 *
86 * Please, keep these structures in sync with emac_stats_keys.
87 */
88
89/* Normal TX/RX Statistics */
90struct emac_stats {
91 u64 rx_packets;
92 u64 rx_bytes;
93 u64 tx_packets;
94 u64 tx_bytes;
95 u64 rx_packets_csum;
96 u64 tx_packets_csum;
97};
98
99/* Error statistics */
100struct emac_error_stats {
101 u64 tx_undo;
102
103 /* Software RX Errors */
104 u64 rx_dropped_stack;
105 u64 rx_dropped_oom;
106 u64 rx_dropped_error;
107 u64 rx_dropped_resize;
108 u64 rx_dropped_mtu;
109 u64 rx_stopped;
110 /* BD reported RX errors */
111 u64 rx_bd_errors;
112 u64 rx_bd_overrun;
113 u64 rx_bd_bad_packet;
114 u64 rx_bd_runt_packet;
115 u64 rx_bd_short_event;
116 u64 rx_bd_alignment_error;
117 u64 rx_bd_bad_fcs;
118 u64 rx_bd_packet_too_long;
119 u64 rx_bd_out_of_range;
120 u64 rx_bd_in_range;
121 /* EMAC IRQ reported RX errors */
122 u64 rx_parity;
123 u64 rx_fifo_overrun;
124 u64 rx_overrun;
125 u64 rx_bad_packet;
126 u64 rx_runt_packet;
127 u64 rx_short_event;
128 u64 rx_alignment_error;
129 u64 rx_bad_fcs;
130 u64 rx_packet_too_long;
131 u64 rx_out_of_range;
132 u64 rx_in_range;
133
134 /* Software TX Errors */
135 u64 tx_dropped;
136 /* BD reported TX errors */
137 u64 tx_bd_errors;
138 u64 tx_bd_bad_fcs;
139 u64 tx_bd_carrier_loss;
140 u64 tx_bd_excessive_deferral;
141 u64 tx_bd_excessive_collisions;
142 u64 tx_bd_late_collision;
143 u64 tx_bd_multple_collisions;
144 u64 tx_bd_single_collision;
145 u64 tx_bd_underrun;
146 u64 tx_bd_sqe;
147 /* EMAC IRQ reported TX errors */
148 u64 tx_parity;
149 u64 tx_underrun;
150 u64 tx_sqe;
151 u64 tx_errors;
152};
153
154#define EMAC_ETHTOOL_STATS_COUNT ((sizeof(struct emac_stats) + \
155 sizeof(struct emac_error_stats)) \
156 / sizeof(u64))
157
158struct emac_instance {
159 struct net_device *ndev;
160 struct emac_regs __iomem *emacp;
161 struct platform_device *ofdev;
162 struct device_node **blist; /* bootlist entry */
163
164 /* MAL linkage */
165 u32 mal_ph;
166 struct platform_device *mal_dev;
167 u32 mal_rx_chan;
168 u32 mal_tx_chan;
169 struct mal_instance *mal;
170 struct mal_commac commac;
171
172 /* PHY infos */
173 phy_interface_t phy_mode;
174 u32 phy_map;
175 u32 phy_address;
176 u32 phy_feat_exc;
177 struct mii_phy phy;
178 struct mutex link_lock;
179 struct delayed_work link_work;
180 int link_polling;
181
182 /* GPCS PHY infos */
183 u32 gpcs_address;
184
185 /* Shared MDIO if any */
186 u32 mdio_ph;
187 struct platform_device *mdio_dev;
188 struct emac_instance *mdio_instance;
189 struct mutex mdio_lock;
190
191 /* ZMII infos if any */
192 u32 zmii_ph;
193 u32 zmii_port;
194 struct platform_device *zmii_dev;
195
196 /* RGMII infos if any */
197 u32 rgmii_ph;
198 u32 rgmii_port;
199 struct platform_device *rgmii_dev;
200
201 /* TAH infos if any */
202 u32 tah_ph;
203 u32 tah_port;
204 struct platform_device *tah_dev;
205
206 /* IRQs */
207 int wol_irq;
208 int emac_irq;
209
210 /* OPB bus frequency in Mhz */
211 u32 opb_bus_freq;
212
213 /* Cell index within an ASIC (for clk mgmnt) */
214 u32 cell_index;
215
216 /* Max supported MTU */
217 u32 max_mtu;
218
219 /* Feature bits (from probe table) */
220 unsigned int features;
221
222 /* Tx and Rx fifo sizes & other infos in bytes */
223 u32 tx_fifo_size;
224 u32 tx_fifo_size_gige;
225 u32 rx_fifo_size;
226 u32 rx_fifo_size_gige;
227 u32 fifo_entry_size;
228 u32 mal_burst_size; /* move to MAL ? */
229
230 /* IAHT and GAHT filter parameterization */
231 u32 xaht_slots_shift;
232 u32 xaht_width_shift;
233
234 /* Descriptor management
235 */
236 struct mal_descriptor *tx_desc;
237 int tx_cnt;
238 int tx_slot;
239 int ack_slot;
240
241 struct mal_descriptor *rx_desc;
242 int rx_slot;
243 struct sk_buff *rx_sg_skb; /* 1 */
244 int rx_skb_size;
245 int rx_sync_size;
246
247 struct sk_buff *tx_skb[NUM_TX_BUFF];
248 struct sk_buff *rx_skb[NUM_RX_BUFF];
249
250 /* Stats
251 */
252 struct emac_error_stats estats;
253 struct emac_stats stats;
254
255 /* Misc
256 */
257 int reset_failed;
258 int stop_timeout; /* in us */
259 int no_mcast;
260 int mcast_pending;
261 int opened;
262 struct work_struct reset_work;
263 spinlock_t lock;
264};
265
266/*
267 * Features of various EMAC implementations
268 */
269
270/*
271 * No flow control on 40x according to the original driver
272 */
273#define EMAC_FTR_NO_FLOW_CONTROL_40x 0x00000001
274/*
275 * Cell is an EMAC4
276 */
277#define EMAC_FTR_EMAC4 0x00000002
278/*
279 * For the 440SPe, AMCC inexplicably changed the polarity of
280 * the "operation complete" bit in the MII control register.
281 */
282#define EMAC_FTR_STACR_OC_INVERT 0x00000004
283/*
284 * Set if we have a TAH.
285 */
286#define EMAC_FTR_HAS_TAH 0x00000008
287/*
288 * Set if we have a ZMII.
289 */
290#define EMAC_FTR_HAS_ZMII 0x00000010
291/*
292 * Set if we have a RGMII.
293 */
294#define EMAC_FTR_HAS_RGMII 0x00000020
295/*
296 * Set if we have new type STACR with STAOPC
297 */
298#define EMAC_FTR_HAS_NEW_STACR 0x00000040
299/*
300 * Set if we need phy clock workaround for 440gx
301 */
302#define EMAC_FTR_440GX_PHY_CLK_FIX 0x00000080
303/*
304 * Set if we need phy clock workaround for 440ep or 440gr
305 */
306#define EMAC_FTR_440EP_PHY_CLK_FIX 0x00000100
307/*
308 * The 405EX and 460EX contain the EMAC4SYNC core
309 */
310#define EMAC_FTR_EMAC4SYNC 0x00000200
311/*
312 * Set if we need phy clock workaround for 460ex or 460gt
313 */
314#define EMAC_FTR_460EX_PHY_CLK_FIX 0x00000400
315/*
316 * APM821xx requires Jumbo frame size set explicitly
317 */
318#define EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE 0x00000800
319/*
320 * APM821xx does not support Half Duplex mode
321 */
322#define EMAC_FTR_APM821XX_NO_HALF_DUPLEX 0x00001000
323
324/* Right now, we don't quite handle the always/possible masks on the
325 * most optimal way as we don't have a way to say something like
326 * always EMAC4. Patches welcome.
327 */
328enum {
329 EMAC_FTRS_ALWAYS = 0,
330
331 EMAC_FTRS_POSSIBLE =
332#ifdef CONFIG_IBM_EMAC_EMAC4
333 EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC |
334 EMAC_FTR_HAS_NEW_STACR |
335 EMAC_FTR_STACR_OC_INVERT | EMAC_FTR_440GX_PHY_CLK_FIX |
336#endif
337#ifdef CONFIG_IBM_EMAC_TAH
338 EMAC_FTR_HAS_TAH |
339#endif
340#ifdef CONFIG_IBM_EMAC_ZMII
341 EMAC_FTR_HAS_ZMII |
342#endif
343#ifdef CONFIG_IBM_EMAC_RGMII
344 EMAC_FTR_HAS_RGMII |
345#endif
346#ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
347 EMAC_FTR_NO_FLOW_CONTROL_40x |
348#endif
349 EMAC_FTR_460EX_PHY_CLK_FIX |
350 EMAC_FTR_440EP_PHY_CLK_FIX |
351 EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
352 EMAC_FTR_APM821XX_NO_HALF_DUPLEX,
353};
354
355static inline int emac_has_feature(struct emac_instance *dev,
356 unsigned long feature)
357{
358 return (EMAC_FTRS_ALWAYS & feature) ||
359 (EMAC_FTRS_POSSIBLE & dev->features & feature);
360}
361
362/*
363 * Various instances of the EMAC core have varying 1) number of
364 * address match slots, 2) width of the registers for handling address
365 * match slots, 3) number of registers for handling address match
366 * slots and 4) base offset for those registers.
367 *
368 * These macros and inlines handle these differences based on
369 * parameters supplied by the device structure which are, in turn,
370 * initialized based on the "compatible" entry in the device tree.
371 */
372
373#define EMAC4_XAHT_SLOTS_SHIFT 6
374#define EMAC4_XAHT_WIDTH_SHIFT 4
375
376#define EMAC4SYNC_XAHT_SLOTS_SHIFT 8
377#define EMAC4SYNC_XAHT_WIDTH_SHIFT 5
378
379/* The largest span between slots and widths above is 3 */
380#define EMAC_XAHT_MAX_REGS (1 << 3)
381
382#define EMAC_XAHT_SLOTS(dev) (1 << (dev)->xaht_slots_shift)
383#define EMAC_XAHT_WIDTH(dev) (1 << (dev)->xaht_width_shift)
384#define EMAC_XAHT_REGS(dev) (1 << ((dev)->xaht_slots_shift - \
385 (dev)->xaht_width_shift))
386
387#define EMAC_XAHT_CRC_TO_SLOT(dev, crc) \
388 ((EMAC_XAHT_SLOTS(dev) - 1) - \
389 ((crc) >> ((sizeof (u32) * BITS_PER_BYTE) - \
390 (dev)->xaht_slots_shift)))
391
392#define EMAC_XAHT_SLOT_TO_REG(dev, slot) \
393 ((slot) >> (dev)->xaht_width_shift)
394
395#define EMAC_XAHT_SLOT_TO_MASK(dev, slot) \
396 ((u32)(1 << (EMAC_XAHT_WIDTH(dev) - 1)) >> \
397 ((slot) & (u32)(EMAC_XAHT_WIDTH(dev) - 1)))
398
399static inline u32 __iomem *emac_xaht_base(struct emac_instance *dev)
400{
401 struct emac_regs __iomem *p = dev->emacp;
402 int offset;
403
404 /* The first IAHT entry always is the base of the block of
405 * IAHT and GAHT registers.
406 */
407 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC))
408 offset = offsetof(struct emac_regs, u1.emac4sync.iaht1);
409 else
410 offset = offsetof(struct emac_regs, u0.emac4.iaht1);
411
412 return (u32 __iomem *)((__force ptrdiff_t)p + offset);
413}
414
415static inline u32 __iomem *emac_gaht_base(struct emac_instance *dev)
416{
417 /* GAHT registers always come after an identical number of
418 * IAHT registers.
419 */
420 return emac_xaht_base(dev) + EMAC_XAHT_REGS(dev);
421}
422
423static inline u32 *emac_iaht_base(struct emac_instance *dev)
424{
425 /* IAHT registers always come before an identical number of
426 * GAHT registers.
427 */
428 return emac_xaht_base(dev);
429}
430
431/* Ethtool get_regs complex data.
432 * We want to get not just EMAC registers, but also MAL, ZMII, RGMII, TAH
433 * when available.
434 *
435 * Returned BLOB consists of the ibm_emac_ethtool_regs_hdr,
436 * MAL registers, EMAC registers and optional ZMII, RGMII, TAH registers.
437 * Each register component is preceded with emac_ethtool_regs_subhdr.
438 * Order of the optional headers follows their relative bit posititions
439 * in emac_ethtool_regs_hdr.components
440 */
441#define EMAC_ETHTOOL_REGS_ZMII 0x00000001
442#define EMAC_ETHTOOL_REGS_RGMII 0x00000002
443#define EMAC_ETHTOOL_REGS_TAH 0x00000004
444
445struct emac_ethtool_regs_hdr {
446 u32 components;
447};
448
449struct emac_ethtool_regs_subhdr {
450 u32 version;
451 u32 index;
452};
453
454#define EMAC_ETHTOOL_REGS_VER 3
455#define EMAC4_ETHTOOL_REGS_VER 4
456#define EMAC4SYNC_ETHTOOL_REGS_VER 5
457
458#endif /* __IBM_NEWEMAC_CORE_H */
1/*
2 * drivers/net/ethernet/ibm/emac/core.h
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller.
5 *
6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
7 * <benh@kernel.crashing.org>
8 *
9 * Based on the arch/ppc version of the driver:
10 *
11 * Copyright (c) 2004, 2005 Zultys Technologies.
12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
13 *
14 * Based on original work by
15 * Armin Kuster <akuster@mvista.com>
16 * Johnnie Peters <jpeters@mvista.com>
17 * Copyright 2000, 2001 MontaVista Softare Inc.
18 *
19 * This program is free software; you can redistribute it and/or modify it
20 * under the terms of the GNU General Public License as published by the
21 * Free Software Foundation; either version 2 of the License, or (at your
22 * option) any later version.
23 *
24 */
25#ifndef __IBM_NEWEMAC_CORE_H
26#define __IBM_NEWEMAC_CORE_H
27
28#include <linux/module.h>
29#include <linux/list.h>
30#include <linux/kernel.h>
31#include <linux/interrupt.h>
32#include <linux/netdevice.h>
33#include <linux/dma-mapping.h>
34#include <linux/spinlock.h>
35#include <linux/of_platform.h>
36#include <linux/slab.h>
37
38#include <asm/io.h>
39#include <asm/dcr.h>
40
41#include "emac.h"
42#include "phy.h"
43#include "zmii.h"
44#include "rgmii.h"
45#include "mal.h"
46#include "tah.h"
47#include "debug.h"
48
49#define NUM_TX_BUFF CONFIG_IBM_EMAC_TXB
50#define NUM_RX_BUFF CONFIG_IBM_EMAC_RXB
51
52/* Simple sanity check */
53#if NUM_TX_BUFF > 256 || NUM_RX_BUFF > 256
54#error Invalid number of buffer descriptors (greater than 256)
55#endif
56
57#define EMAC_MIN_MTU 46
58
59/* Maximum L2 header length (VLAN tagged, no FCS) */
60#define EMAC_MTU_OVERHEAD (6 * 2 + 2 + 4)
61
62/* RX BD size for the given MTU */
63static inline int emac_rx_size(int mtu)
64{
65 if (mtu > ETH_DATA_LEN)
66 return MAL_MAX_RX_SIZE;
67 else
68 return mal_rx_size(ETH_DATA_LEN + EMAC_MTU_OVERHEAD);
69}
70
71#define EMAC_DMA_ALIGN(x) ALIGN((x), dma_get_cache_alignment())
72
73#define EMAC_RX_SKB_HEADROOM \
74 EMAC_DMA_ALIGN(CONFIG_IBM_EMAC_RX_SKB_HEADROOM)
75
76/* Size of RX skb for the given MTU */
77static inline int emac_rx_skb_size(int mtu)
78{
79 int size = max(mtu + EMAC_MTU_OVERHEAD, emac_rx_size(mtu));
80 return EMAC_DMA_ALIGN(size + 2) + EMAC_RX_SKB_HEADROOM;
81}
82
83/* RX DMA sync size */
84static inline int emac_rx_sync_size(int mtu)
85{
86 return EMAC_DMA_ALIGN(emac_rx_size(mtu) + 2);
87}
88
89/* Driver statistcs is split into two parts to make it more cache friendly:
90 * - normal statistics (packet count, etc)
91 * - error statistics
92 *
93 * When statistics is requested by ethtool, these parts are concatenated,
94 * normal one goes first.
95 *
96 * Please, keep these structures in sync with emac_stats_keys.
97 */
98
99/* Normal TX/RX Statistics */
100struct emac_stats {
101 u64 rx_packets;
102 u64 rx_bytes;
103 u64 tx_packets;
104 u64 tx_bytes;
105 u64 rx_packets_csum;
106 u64 tx_packets_csum;
107};
108
109/* Error statistics */
110struct emac_error_stats {
111 u64 tx_undo;
112
113 /* Software RX Errors */
114 u64 rx_dropped_stack;
115 u64 rx_dropped_oom;
116 u64 rx_dropped_error;
117 u64 rx_dropped_resize;
118 u64 rx_dropped_mtu;
119 u64 rx_stopped;
120 /* BD reported RX errors */
121 u64 rx_bd_errors;
122 u64 rx_bd_overrun;
123 u64 rx_bd_bad_packet;
124 u64 rx_bd_runt_packet;
125 u64 rx_bd_short_event;
126 u64 rx_bd_alignment_error;
127 u64 rx_bd_bad_fcs;
128 u64 rx_bd_packet_too_long;
129 u64 rx_bd_out_of_range;
130 u64 rx_bd_in_range;
131 /* EMAC IRQ reported RX errors */
132 u64 rx_parity;
133 u64 rx_fifo_overrun;
134 u64 rx_overrun;
135 u64 rx_bad_packet;
136 u64 rx_runt_packet;
137 u64 rx_short_event;
138 u64 rx_alignment_error;
139 u64 rx_bad_fcs;
140 u64 rx_packet_too_long;
141 u64 rx_out_of_range;
142 u64 rx_in_range;
143
144 /* Software TX Errors */
145 u64 tx_dropped;
146 /* BD reported TX errors */
147 u64 tx_bd_errors;
148 u64 tx_bd_bad_fcs;
149 u64 tx_bd_carrier_loss;
150 u64 tx_bd_excessive_deferral;
151 u64 tx_bd_excessive_collisions;
152 u64 tx_bd_late_collision;
153 u64 tx_bd_multple_collisions;
154 u64 tx_bd_single_collision;
155 u64 tx_bd_underrun;
156 u64 tx_bd_sqe;
157 /* EMAC IRQ reported TX errors */
158 u64 tx_parity;
159 u64 tx_underrun;
160 u64 tx_sqe;
161 u64 tx_errors;
162};
163
164#define EMAC_ETHTOOL_STATS_COUNT ((sizeof(struct emac_stats) + \
165 sizeof(struct emac_error_stats)) \
166 / sizeof(u64))
167
168struct emac_instance {
169 struct net_device *ndev;
170 struct resource rsrc_regs;
171 struct emac_regs __iomem *emacp;
172 struct platform_device *ofdev;
173 struct device_node **blist; /* bootlist entry */
174
175 /* MAL linkage */
176 u32 mal_ph;
177 struct platform_device *mal_dev;
178 u32 mal_rx_chan;
179 u32 mal_tx_chan;
180 struct mal_instance *mal;
181 struct mal_commac commac;
182
183 /* PHY infos */
184 u32 phy_mode;
185 u32 phy_map;
186 u32 phy_address;
187 u32 phy_feat_exc;
188 struct mii_phy phy;
189 struct mutex link_lock;
190 struct delayed_work link_work;
191 int link_polling;
192
193 /* GPCS PHY infos */
194 u32 gpcs_address;
195
196 /* Shared MDIO if any */
197 u32 mdio_ph;
198 struct platform_device *mdio_dev;
199 struct emac_instance *mdio_instance;
200 struct mutex mdio_lock;
201
202 /* ZMII infos if any */
203 u32 zmii_ph;
204 u32 zmii_port;
205 struct platform_device *zmii_dev;
206
207 /* RGMII infos if any */
208 u32 rgmii_ph;
209 u32 rgmii_port;
210 struct platform_device *rgmii_dev;
211
212 /* TAH infos if any */
213 u32 tah_ph;
214 u32 tah_port;
215 struct platform_device *tah_dev;
216
217 /* IRQs */
218 int wol_irq;
219 int emac_irq;
220
221 /* OPB bus frequency in Mhz */
222 u32 opb_bus_freq;
223
224 /* Cell index within an ASIC (for clk mgmnt) */
225 u32 cell_index;
226
227 /* Max supported MTU */
228 u32 max_mtu;
229
230 /* Feature bits (from probe table) */
231 unsigned int features;
232
233 /* Tx and Rx fifo sizes & other infos in bytes */
234 u32 tx_fifo_size;
235 u32 tx_fifo_size_gige;
236 u32 rx_fifo_size;
237 u32 rx_fifo_size_gige;
238 u32 fifo_entry_size;
239 u32 mal_burst_size; /* move to MAL ? */
240
241 /* IAHT and GAHT filter parameterization */
242 u32 xaht_slots_shift;
243 u32 xaht_width_shift;
244
245 /* Descriptor management
246 */
247 struct mal_descriptor *tx_desc;
248 int tx_cnt;
249 int tx_slot;
250 int ack_slot;
251
252 struct mal_descriptor *rx_desc;
253 int rx_slot;
254 struct sk_buff *rx_sg_skb; /* 1 */
255 int rx_skb_size;
256 int rx_sync_size;
257
258 struct sk_buff *tx_skb[NUM_TX_BUFF];
259 struct sk_buff *rx_skb[NUM_RX_BUFF];
260
261 /* Stats
262 */
263 struct emac_error_stats estats;
264 struct net_device_stats nstats;
265 struct emac_stats stats;
266
267 /* Misc
268 */
269 int reset_failed;
270 int stop_timeout; /* in us */
271 int no_mcast;
272 int mcast_pending;
273 int opened;
274 struct work_struct reset_work;
275 spinlock_t lock;
276};
277
278/*
279 * Features of various EMAC implementations
280 */
281
282/*
283 * No flow control on 40x according to the original driver
284 */
285#define EMAC_FTR_NO_FLOW_CONTROL_40x 0x00000001
286/*
287 * Cell is an EMAC4
288 */
289#define EMAC_FTR_EMAC4 0x00000002
290/*
291 * For the 440SPe, AMCC inexplicably changed the polarity of
292 * the "operation complete" bit in the MII control register.
293 */
294#define EMAC_FTR_STACR_OC_INVERT 0x00000004
295/*
296 * Set if we have a TAH.
297 */
298#define EMAC_FTR_HAS_TAH 0x00000008
299/*
300 * Set if we have a ZMII.
301 */
302#define EMAC_FTR_HAS_ZMII 0x00000010
303/*
304 * Set if we have a RGMII.
305 */
306#define EMAC_FTR_HAS_RGMII 0x00000020
307/*
308 * Set if we have new type STACR with STAOPC
309 */
310#define EMAC_FTR_HAS_NEW_STACR 0x00000040
311/*
312 * Set if we need phy clock workaround for 440gx
313 */
314#define EMAC_FTR_440GX_PHY_CLK_FIX 0x00000080
315/*
316 * Set if we need phy clock workaround for 440ep or 440gr
317 */
318#define EMAC_FTR_440EP_PHY_CLK_FIX 0x00000100
319/*
320 * The 405EX and 460EX contain the EMAC4SYNC core
321 */
322#define EMAC_FTR_EMAC4SYNC 0x00000200
323/*
324 * Set if we need phy clock workaround for 460ex or 460gt
325 */
326#define EMAC_FTR_460EX_PHY_CLK_FIX 0x00000400
327/*
328 * APM821xx requires Jumbo frame size set explicitly
329 */
330#define EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE 0x00000800
331/*
332 * APM821xx does not support Half Duplex mode
333 */
334#define EMAC_FTR_APM821XX_NO_HALF_DUPLEX 0x00001000
335
336/* Right now, we don't quite handle the always/possible masks on the
337 * most optimal way as we don't have a way to say something like
338 * always EMAC4. Patches welcome.
339 */
340enum {
341 EMAC_FTRS_ALWAYS = 0,
342
343 EMAC_FTRS_POSSIBLE =
344#ifdef CONFIG_IBM_EMAC_EMAC4
345 EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC |
346 EMAC_FTR_HAS_NEW_STACR |
347 EMAC_FTR_STACR_OC_INVERT | EMAC_FTR_440GX_PHY_CLK_FIX |
348#endif
349#ifdef CONFIG_IBM_EMAC_TAH
350 EMAC_FTR_HAS_TAH |
351#endif
352#ifdef CONFIG_IBM_EMAC_ZMII
353 EMAC_FTR_HAS_ZMII |
354#endif
355#ifdef CONFIG_IBM_EMAC_RGMII
356 EMAC_FTR_HAS_RGMII |
357#endif
358#ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
359 EMAC_FTR_NO_FLOW_CONTROL_40x |
360#endif
361 EMAC_FTR_460EX_PHY_CLK_FIX |
362 EMAC_FTR_440EP_PHY_CLK_FIX |
363 EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE |
364 EMAC_FTR_APM821XX_NO_HALF_DUPLEX,
365};
366
367static inline int emac_has_feature(struct emac_instance *dev,
368 unsigned long feature)
369{
370 return (EMAC_FTRS_ALWAYS & feature) ||
371 (EMAC_FTRS_POSSIBLE & dev->features & feature);
372}
373
374/*
375 * Various instances of the EMAC core have varying 1) number of
376 * address match slots, 2) width of the registers for handling address
377 * match slots, 3) number of registers for handling address match
378 * slots and 4) base offset for those registers.
379 *
380 * These macros and inlines handle these differences based on
381 * parameters supplied by the device structure which are, in turn,
382 * initialized based on the "compatible" entry in the device tree.
383 */
384
385#define EMAC4_XAHT_SLOTS_SHIFT 6
386#define EMAC4_XAHT_WIDTH_SHIFT 4
387
388#define EMAC4SYNC_XAHT_SLOTS_SHIFT 8
389#define EMAC4SYNC_XAHT_WIDTH_SHIFT 5
390
391#define EMAC_XAHT_SLOTS(dev) (1 << (dev)->xaht_slots_shift)
392#define EMAC_XAHT_WIDTH(dev) (1 << (dev)->xaht_width_shift)
393#define EMAC_XAHT_REGS(dev) (1 << ((dev)->xaht_slots_shift - \
394 (dev)->xaht_width_shift))
395
396#define EMAC_XAHT_CRC_TO_SLOT(dev, crc) \
397 ((EMAC_XAHT_SLOTS(dev) - 1) - \
398 ((crc) >> ((sizeof (u32) * BITS_PER_BYTE) - \
399 (dev)->xaht_slots_shift)))
400
401#define EMAC_XAHT_SLOT_TO_REG(dev, slot) \
402 ((slot) >> (dev)->xaht_width_shift)
403
404#define EMAC_XAHT_SLOT_TO_MASK(dev, slot) \
405 ((u32)(1 << (EMAC_XAHT_WIDTH(dev) - 1)) >> \
406 ((slot) & (u32)(EMAC_XAHT_WIDTH(dev) - 1)))
407
408static inline u32 *emac_xaht_base(struct emac_instance *dev)
409{
410 struct emac_regs __iomem *p = dev->emacp;
411 int offset;
412
413 /* The first IAHT entry always is the base of the block of
414 * IAHT and GAHT registers.
415 */
416 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC))
417 offset = offsetof(struct emac_regs, u1.emac4sync.iaht1);
418 else
419 offset = offsetof(struct emac_regs, u0.emac4.iaht1);
420
421 return (u32 *)((ptrdiff_t)p + offset);
422}
423
424static inline u32 *emac_gaht_base(struct emac_instance *dev)
425{
426 /* GAHT registers always come after an identical number of
427 * IAHT registers.
428 */
429 return emac_xaht_base(dev) + EMAC_XAHT_REGS(dev);
430}
431
432static inline u32 *emac_iaht_base(struct emac_instance *dev)
433{
434 /* IAHT registers always come before an identical number of
435 * GAHT registers.
436 */
437 return emac_xaht_base(dev);
438}
439
440/* Ethtool get_regs complex data.
441 * We want to get not just EMAC registers, but also MAL, ZMII, RGMII, TAH
442 * when available.
443 *
444 * Returned BLOB consists of the ibm_emac_ethtool_regs_hdr,
445 * MAL registers, EMAC registers and optional ZMII, RGMII, TAH registers.
446 * Each register component is preceded with emac_ethtool_regs_subhdr.
447 * Order of the optional headers follows their relative bit posititions
448 * in emac_ethtool_regs_hdr.components
449 */
450#define EMAC_ETHTOOL_REGS_ZMII 0x00000001
451#define EMAC_ETHTOOL_REGS_RGMII 0x00000002
452#define EMAC_ETHTOOL_REGS_TAH 0x00000004
453
454struct emac_ethtool_regs_hdr {
455 u32 components;
456};
457
458struct emac_ethtool_regs_subhdr {
459 u32 version;
460 u32 index;
461};
462
463#define EMAC_ETHTOOL_REGS_VER 0
464#define EMAC_ETHTOOL_REGS_SIZE(dev) ((dev)->rsrc_regs.end - \
465 (dev)->rsrc_regs.start + 1)
466#define EMAC4_ETHTOOL_REGS_VER 1
467#define EMAC4_ETHTOOL_REGS_SIZE(dev) ((dev)->rsrc_regs.end - \
468 (dev)->rsrc_regs.start + 1)
469
470#endif /* __IBM_NEWEMAC_CORE_H */