1 /*
2 * drivers/net/ibm_newemac/debug.c
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
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 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 */
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/netdevice.h>
24 #include <linux/sysrq.h>
25 #include <asm/io.h>
26
27 #include "core.h"
28
29 static DEFINE_SPINLOCK(emac_dbg_lock);
30
emac_desc_dump(struct emac_instance * p)31 static void emac_desc_dump(struct emac_instance *p)
32 {
33 int i;
34 printk("** EMAC %s TX BDs **\n"
35 " tx_cnt = %d tx_slot = %d ack_slot = %d\n",
36 p->ofdev->node->full_name,
37 p->tx_cnt, p->tx_slot, p->ack_slot);
38 for (i = 0; i < NUM_TX_BUFF / 2; ++i)
39 printk
40 ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
41 i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ',
42 p->tx_desc[i].ctrl, p->tx_desc[i].data_len,
43 NUM_TX_BUFF / 2 + i,
44 p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr,
45 p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ',
46 p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl,
47 p->tx_desc[NUM_TX_BUFF / 2 + i].data_len);
48
49 printk("** EMAC %s RX BDs **\n"
50 " rx_slot = %d flags = 0x%lx rx_skb_size = %d rx_sync_size = %d\n"
51 " rx_sg_skb = 0x%p\n",
52 p->ofdev->node->full_name,
53 p->rx_slot, p->commac.flags, p->rx_skb_size,
54 p->rx_sync_size, p->rx_sg_skb);
55 for (i = 0; i < NUM_RX_BUFF / 2; ++i)
56 printk
57 ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
58 i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ',
59 p->rx_desc[i].ctrl, p->rx_desc[i].data_len,
60 NUM_RX_BUFF / 2 + i,
61 p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr,
62 p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ',
63 p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl,
64 p->rx_desc[NUM_RX_BUFF / 2 + i].data_len);
65 }
66
emac_mac_dump(struct emac_instance * dev)67 static void emac_mac_dump(struct emac_instance *dev)
68 {
69 struct emac_regs __iomem *p = dev->emacp;
70 const int xaht_regs = EMAC_XAHT_REGS(dev);
71 u32 *gaht_base = emac_gaht_base(dev);
72 u32 *iaht_base = emac_iaht_base(dev);
73 int emac4sync = emac_has_feature(dev, EMAC_FTR_EMAC4SYNC);
74 int n;
75
76 printk("** EMAC %s registers **\n"
77 "MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
78 "RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
79 "IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n",
80 dev->ofdev->node->full_name, in_be32(&p->mr0), in_be32(&p->mr1),
81 in_be32(&p->tmr0), in_be32(&p->tmr1),
82 in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
83 in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
84 in_be32(&p->vtci)
85 );
86
87 if (emac4sync)
88 printk("MAR = %04x%08x MMAR = %04x%08x\n",
89 in_be32(&p->u0.emac4sync.mahr),
90 in_be32(&p->u0.emac4sync.malr),
91 in_be32(&p->u0.emac4sync.mmahr),
92 in_be32(&p->u0.emac4sync.mmalr)
93 );
94
95 for (n = 0; n < xaht_regs; n++)
96 printk("IAHT%02d = 0x%08x\n", n + 1, in_be32(iaht_base + n));
97
98 for (n = 0; n < xaht_regs; n++)
99 printk("GAHT%02d = 0x%08x\n", n + 1, in_be32(gaht_base + n));
100
101 printk("LSA = %04x%08x IPGVR = 0x%04x\n"
102 "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
103 "OCTX = 0x%08x OCRX = 0x%08x\n",
104 in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
105 in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
106 in_be32(&p->octx), in_be32(&p->ocrx)
107 );
108
109 if (!emac4sync) {
110 printk("IPCR = 0x%08x\n",
111 in_be32(&p->u1.emac4.ipcr)
112 );
113 } else {
114 printk("REVID = 0x%08x TPC = 0x%08x\n",
115 in_be32(&p->u1.emac4sync.revid),
116 in_be32(&p->u1.emac4sync.tpc)
117 );
118 }
119
120 emac_desc_dump(dev);
121 }
122
emac_mal_dump(struct mal_instance * mal)123 static void emac_mal_dump(struct mal_instance *mal)
124 {
125 int i;
126
127 printk("** MAL %s Registers **\n"
128 "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
129 "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
130 "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
131 mal->ofdev->node->full_name,
132 get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
133 get_mal_dcrn(mal, MAL_IER),
134 get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
135 get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
136 get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
137 get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
138 );
139
140 printk("TX|");
141 for (i = 0; i < mal->num_tx_chans; ++i) {
142 if (i && !(i % 4))
143 printk("\n ");
144 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
145 }
146 printk("\nRX|");
147 for (i = 0; i < mal->num_rx_chans; ++i) {
148 if (i && !(i % 4))
149 printk("\n ");
150 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
151 }
152 printk("\n ");
153 for (i = 0; i < mal->num_rx_chans; ++i) {
154 u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
155 if (i && !(i % 3))
156 printk("\n ");
157 printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
158 }
159 printk("\n");
160 }
161
162 static struct emac_instance *__emacs[4];
163 static struct mal_instance *__mals[1];
164
emac_dbg_register(struct emac_instance * dev)165 void emac_dbg_register(struct emac_instance *dev)
166 {
167 unsigned long flags;
168 int i;
169
170 spin_lock_irqsave(&emac_dbg_lock, flags);
171 for (i = 0; i < ARRAY_SIZE(__emacs); i++)
172 if (__emacs[i] == NULL) {
173 __emacs[i] = dev;
174 break;
175 }
176 spin_unlock_irqrestore(&emac_dbg_lock, flags);
177 }
178
emac_dbg_unregister(struct emac_instance * dev)179 void emac_dbg_unregister(struct emac_instance *dev)
180 {
181 unsigned long flags;
182 int i;
183
184 spin_lock_irqsave(&emac_dbg_lock, flags);
185 for (i = 0; i < ARRAY_SIZE(__emacs); i++)
186 if (__emacs[i] == dev) {
187 __emacs[i] = NULL;
188 break;
189 }
190 spin_unlock_irqrestore(&emac_dbg_lock, flags);
191 }
192
mal_dbg_register(struct mal_instance * mal)193 void mal_dbg_register(struct mal_instance *mal)
194 {
195 unsigned long flags;
196 int i;
197
198 spin_lock_irqsave(&emac_dbg_lock, flags);
199 for (i = 0; i < ARRAY_SIZE(__mals); i++)
200 if (__mals[i] == NULL) {
201 __mals[i] = mal;
202 break;
203 }
204 spin_unlock_irqrestore(&emac_dbg_lock, flags);
205 }
206
mal_dbg_unregister(struct mal_instance * mal)207 void mal_dbg_unregister(struct mal_instance *mal)
208 {
209 unsigned long flags;
210 int i;
211
212 spin_lock_irqsave(&emac_dbg_lock, flags);
213 for (i = 0; i < ARRAY_SIZE(__mals); i++)
214 if (__mals[i] == mal) {
215 __mals[i] = NULL;
216 break;
217 }
218 spin_unlock_irqrestore(&emac_dbg_lock, flags);
219 }
220
emac_dbg_dump_all(void)221 void emac_dbg_dump_all(void)
222 {
223 unsigned int i;
224 unsigned long flags;
225
226 spin_lock_irqsave(&emac_dbg_lock, flags);
227
228 for (i = 0; i < ARRAY_SIZE(__mals); ++i)
229 if (__mals[i])
230 emac_mal_dump(__mals[i]);
231
232 for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
233 if (__emacs[i])
234 emac_mac_dump(__emacs[i]);
235
236 spin_unlock_irqrestore(&emac_dbg_lock, flags);
237 }
238
239 #if defined(CONFIG_MAGIC_SYSRQ)
emac_sysrq_handler(int key,struct tty_struct * tty)240 static void emac_sysrq_handler(int key, struct tty_struct *tty)
241 {
242 emac_dbg_dump_all();
243 }
244
245 static struct sysrq_key_op emac_sysrq_op = {
246 .handler = emac_sysrq_handler,
247 .help_msg = "emaC",
248 .action_msg = "Show EMAC(s) status",
249 };
250
emac_init_debug(void)251 int __init emac_init_debug(void)
252 {
253 return register_sysrq_key('c', &emac_sysrq_op);
254 }
255
emac_fini_debug(void)256 void __exit emac_fini_debug(void)
257 {
258 unregister_sysrq_key('c', &emac_sysrq_op);
259 }
260
261 #else
emac_init_debug(void)262 int __init emac_init_debug(void)
263 {
264 return 0;
265 }
emac_fini_debug(void)266 void __exit emac_fini_debug(void)
267 {
268 }
269 #endif /* CONFIG_MAGIC_SYSRQ */
270