drivers/net/ibm_newemac/debug.c

   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
  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
  67 static void emac_mac_dump(struct emac_instance *dev)
  68 {
  69         struct emac_regs __iomem *p = dev->emacp;
  70
  71         printk("** EMAC %s registers **\n"
  72                "MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
  73                "RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
  74                "IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n"
  75                "IAHT: 0x%04x 0x%04x 0x%04x 0x%04x "
  76                "GAHT: 0x%04x 0x%04x 0x%04x 0x%04x\n"
  77                "LSA = %04x%08x IPGVR = 0x%04x\n"
  78                "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
  79                "OCTX = 0x%08x OCRX = 0x%08x IPCR = 0x%08x\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                in_be32(&p->iaht1), in_be32(&p->iaht2), in_be32(&p->iaht3),
  86                in_be32(&p->iaht4),
  87                in_be32(&p->gaht1), in_be32(&p->gaht2), in_be32(&p->gaht3),
  88                in_be32(&p->gaht4),
  89                in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
  90                in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
  91                in_be32(&p->octx), in_be32(&p->ocrx), in_be32(&p->ipcr)
  92             );
  93
  94         emac_desc_dump(dev);
  95 }
  96
  97 static void emac_mal_dump(struct mal_instance *mal)
  98 {
  99         int i;
 100
 101         printk("** MAL %s Registers **\n"
 102                "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
 103                "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
 104                "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
 105                mal->ofdev->node->full_name,
 106                get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
 107                get_mal_dcrn(mal, MAL_IER),
 108                get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
 109                get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
 110                get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
 111                get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
 112             );
 113
 114         printk("TX|");
 115         for (i = 0; i < mal->num_tx_chans; ++i) {
 116                 if (i && !(i % 4))
 117                         printk("\n   ");
 118                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
 119         }
 120         printk("\nRX|");
 121         for (i = 0; i < mal->num_rx_chans; ++i) {
 122                 if (i && !(i % 4))
 123                         printk("\n   ");
 124                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
 125         }
 126         printk("\n   ");
 127         for (i = 0; i < mal->num_rx_chans; ++i) {
 128                 u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
 129                 if (i && !(i % 3))
 130                         printk("\n   ");
 131                 printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
 132         }
 133         printk("\n");
 134 }
 135
 136 static struct emac_instance *__emacs[4];
 137 static struct mal_instance *__mals[1];
 138
 139 void emac_dbg_register(struct emac_instance *dev)
 140 {
 141         unsigned long flags;
 142         int i;
 143
 144         spin_lock_irqsave(&emac_dbg_lock, flags);
 145         for (i = 0; i < ARRAY_SIZE(__emacs); i++)
 146                 if (__emacs[i] == NULL) {
 147                         __emacs[i] = dev;
 148                         break;
 149                 }
 150         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 151 }
 152
 153 void emac_dbg_unregister(struct emac_instance *dev)
 154 {
 155         unsigned long flags;
 156         int i;
 157
 158         spin_lock_irqsave(&emac_dbg_lock, flags);
 159         for (i = 0; i < ARRAY_SIZE(__emacs); i++)
 160                 if (__emacs[i] == dev) {
 161                         __emacs[i] = NULL;
 162                         break;
 163                 }
 164         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 165 }
 166
 167 void mal_dbg_register(struct mal_instance *mal)
 168 {
 169         unsigned long flags;
 170         int i;
 171
 172         spin_lock_irqsave(&emac_dbg_lock, flags);
 173         for (i = 0; i < ARRAY_SIZE(__mals); i++)
 174                 if (__mals[i] == NULL) {
 175                         __mals[i] = mal;
 176                         break;
 177                 }
 178         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 179 }
 180
 181 void mal_dbg_unregister(struct mal_instance *mal)
 182 {
 183         unsigned long flags;
 184         int i;
 185
 186         spin_lock_irqsave(&emac_dbg_lock, flags);
 187         for (i = 0; i < ARRAY_SIZE(__mals); i++)
 188                 if (__mals[i] == mal) {
 189                         __mals[i] = NULL;
 190                         break;
 191                 }
 192         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 193 }
 194
 195 void emac_dbg_dump_all(void)
 196 {
 197         unsigned int i;
 198         unsigned long flags;
 199
 200         spin_lock_irqsave(&emac_dbg_lock, flags);
 201
 202         for (i = 0; i < ARRAY_SIZE(__mals); ++i)
 203                 if (__mals[i])
 204                         emac_mal_dump(__mals[i]);
 205
 206         for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
 207                 if (__emacs[i])
 208                         emac_mac_dump(__emacs[i]);
 209
 210         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 211 }
 212
 213 #if defined(CONFIG_MAGIC_SYSRQ)
 214 static void emac_sysrq_handler(int key, struct tty_struct *tty)
 215 {
 216         emac_dbg_dump_all();
 217 }
 218
 219 static struct sysrq_key_op emac_sysrq_op = {
 220         .handler = emac_sysrq_handler,
 221         .help_msg = "emaC",
 222         .action_msg = "Show EMAC(s) status",
 223 };
 224
 225 int __init emac_init_debug(void)
 226 {
 227         return register_sysrq_key('c', &emac_sysrq_op);
 228 }
 229
 230 void __exit emac_fini_debug(void)
 231 {
 232         unregister_sysrq_key('c', &emac_sysrq_op);
 233 }
 234
 235 #else
 236 int __init emac_init_debug(void)
 237 {
 238         return 0;
 239 }
 240 void __exit emac_fini_debug(void)
 241 {
 242 }
 243 #endif                          /* CONFIG_MAGIC_SYSRQ */