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->dev.of_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->dev.of_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->dev.of_node->full_name,
81 in_be32(&p->mr0), in_be32(&p->mr1),
82 in_be32(&p->tmr0), in_be32(&p->tmr1),
83 in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
84 in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
85 in_be32(&p->vtci)
86 );
87
88 if (emac4sync)
89 printk("MAR = %04x%08x MMAR = %04x%08x\n",
90 in_be32(&p->u0.emac4sync.mahr),
91 in_be32(&p->u0.emac4sync.malr),
92 in_be32(&p->u0.emac4sync.mmahr),
93 in_be32(&p->u0.emac4sync.mmalr)
94 );
95
96 for (n = 0; n < xaht_regs; n++)
97 printk("IAHT%02d = 0x%08x\n", n + 1, in_be32(iaht_base + n));
98
99 for (n = 0; n < xaht_regs; n++)
100 printk("GAHT%02d = 0x%08x\n", n + 1, in_be32(gaht_base + n));
101
102 printk("LSA = %04x%08x IPGVR = 0x%04x\n"
103 "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
104 "OCTX = 0x%08x OCRX = 0x%08x\n",
105 in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
106 in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
107 in_be32(&p->octx), in_be32(&p->ocrx)
108 );
109
110 if (!emac4sync) {
111 printk("IPCR = 0x%08x\n",
112 in_be32(&p->u1.emac4.ipcr)
113 );
114 } else {
115 printk("REVID = 0x%08x TPC = 0x%08x\n",
116 in_be32(&p->u1.emac4sync.revid),
117 in_be32(&p->u1.emac4sync.tpc)
118 );
119 }
120
121 emac_desc_dump(dev);
122 }
123
emac_mal_dump(struct mal_instance * mal)124 static void emac_mal_dump(struct mal_instance *mal)
125 {
126 int i;
127
128 printk("** MAL %s Registers **\n"
129 "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
130 "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
131 "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
132 mal->ofdev->dev.of_node->full_name,
133 get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
134 get_mal_dcrn(mal, MAL_IER),
135 get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
136 get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
137 get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
138 get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
139 );
140
141 printk("TX|");
142 for (i = 0; i < mal->num_tx_chans; ++i) {
143 if (i && !(i % 4))
144 printk("\n ");
145 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
146 }
147 printk("\nRX|");
148 for (i = 0; i < mal->num_rx_chans; ++i) {
149 if (i && !(i % 4))
150 printk("\n ");
151 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
152 }
153 printk("\n ");
154 for (i = 0; i < mal->num_rx_chans; ++i) {
155 u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
156 if (i && !(i % 3))
157 printk("\n ");
158 printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
159 }
160 printk("\n");
161 }
162
163 static struct emac_instance *__emacs[4];
164 static struct mal_instance *__mals[1];
165
emac_dbg_register(struct emac_instance * dev)166 void emac_dbg_register(struct emac_instance *dev)
167 {
168 unsigned long flags;
169 int i;
170
171 spin_lock_irqsave(&emac_dbg_lock, flags);
172 for (i = 0; i < ARRAY_SIZE(__emacs); i++)
173 if (__emacs[i] == NULL) {
174 __emacs[i] = dev;
175 break;
176 }
177 spin_unlock_irqrestore(&emac_dbg_lock, flags);
178 }
179
emac_dbg_unregister(struct emac_instance * dev)180 void emac_dbg_unregister(struct emac_instance *dev)
181 {
182 unsigned long flags;
183 int i;
184
185 spin_lock_irqsave(&emac_dbg_lock, flags);
186 for (i = 0; i < ARRAY_SIZE(__emacs); i++)
187 if (__emacs[i] == dev) {
188 __emacs[i] = NULL;
189 break;
190 }
191 spin_unlock_irqrestore(&emac_dbg_lock, flags);
192 }
193
mal_dbg_register(struct mal_instance * mal)194 void mal_dbg_register(struct mal_instance *mal)
195 {
196 unsigned long flags;
197 int i;
198
199 spin_lock_irqsave(&emac_dbg_lock, flags);
200 for (i = 0; i < ARRAY_SIZE(__mals); i++)
201 if (__mals[i] == NULL) {
202 __mals[i] = mal;
203 break;
204 }
205 spin_unlock_irqrestore(&emac_dbg_lock, flags);
206 }
207
mal_dbg_unregister(struct mal_instance * mal)208 void mal_dbg_unregister(struct mal_instance *mal)
209 {
210 unsigned long flags;
211 int i;
212
213 spin_lock_irqsave(&emac_dbg_lock, flags);
214 for (i = 0; i < ARRAY_SIZE(__mals); i++)
215 if (__mals[i] == mal) {
216 __mals[i] = NULL;
217 break;
218 }
219 spin_unlock_irqrestore(&emac_dbg_lock, flags);
220 }
221
emac_dbg_dump_all(void)222 void emac_dbg_dump_all(void)
223 {
224 unsigned int i;
225 unsigned long flags;
226
227 spin_lock_irqsave(&emac_dbg_lock, flags);
228
229 for (i = 0; i < ARRAY_SIZE(__mals); ++i)
230 if (__mals[i])
231 emac_mal_dump(__mals[i]);
232
233 for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
234 if (__emacs[i])
235 emac_mac_dump(__emacs[i]);
236
237 spin_unlock_irqrestore(&emac_dbg_lock, flags);
238 }
239
240 #if defined(CONFIG_MAGIC_SYSRQ)
emac_sysrq_handler(int key)241 static void emac_sysrq_handler(int key)
242 {
243 emac_dbg_dump_all();
244 }
245
246 static struct sysrq_key_op emac_sysrq_op = {
247 .handler = emac_sysrq_handler,
248 .help_msg = "emaC",
249 .action_msg = "Show EMAC(s) status",
250 };
251
emac_init_debug(void)252 int __init emac_init_debug(void)
253 {
254 return register_sysrq_key('c', &emac_sysrq_op);
255 }
256
emac_fini_debug(void)257 void __exit emac_fini_debug(void)
258 {
259 unregister_sysrq_key('c', &emac_sysrq_op);
260 }
261
262 #else
emac_init_debug(void)263 int __init emac_init_debug(void)
264 {
265 return 0;
266 }
emac_fini_debug(void)267 void __exit emac_fini_debug(void)
268 {
269 }
270 #endif /* CONFIG_MAGIC_SYSRQ */
271