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 (c) 2004, 2005 Zultys Technologies
   7  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  *
  14  */
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/kernel.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/sysrq.h>
  20 #include <asm/io.h>
  21
  22 #include "core.h"
  23
  24 static spinlock_t emac_dbg_lock = SPIN_LOCK_UNLOCKED;
  25
  26 static void emac_desc_dump(struct emac_instance *p)
  27 {
  28         int i;
  29         printk("** EMAC %s TX BDs **\n"
  30                " tx_cnt = %d tx_slot = %d ack_slot = %d\n",
  31                p->ofdev->node->full_name,
  32                p->tx_cnt, p->tx_slot, p->ack_slot);
  33         for (i = 0; i < NUM_TX_BUFF / 2; ++i)
  34                 printk
  35                     ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
  36                      i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ',
  37                      p->tx_desc[i].ctrl, p->tx_desc[i].data_len,
  38                      NUM_TX_BUFF / 2 + i,
  39                      p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr,
  40                      p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ',
  41                      p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl,
  42                      p->tx_desc[NUM_TX_BUFF / 2 + i].data_len);
  43
  44         printk("** EMAC %s RX BDs **\n"
  45                " rx_slot = %d flags = 0x%lx rx_skb_size = %d rx_sync_size = %d\n"
  46                " rx_sg_skb = 0x%p\n",
  47                p->ofdev->node->full_name,
  48                p->rx_slot, p->commac.flags, p->rx_skb_size,
  49                p->rx_sync_size, p->rx_sg_skb);
  50         for (i = 0; i < NUM_RX_BUFF / 2; ++i)
  51                 printk
  52                     ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
  53                      i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ',
  54                      p->rx_desc[i].ctrl, p->rx_desc[i].data_len,
  55                      NUM_RX_BUFF / 2 + i,
  56                      p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr,
  57                      p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ',
  58                      p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl,
  59                      p->rx_desc[NUM_RX_BUFF / 2 + i].data_len);
  60 }
  61
  62 static void emac_mac_dump(struct emac_instance *dev)
  63 {
  64         struct emac_regs __iomem *p = dev->emacp;
  65
  66         printk("** EMAC %s registers **\n"
  67                "MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
  68                "RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
  69                "IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n"
  70                "IAHT: 0x%04x 0x%04x 0x%04x 0x%04x "
  71                "GAHT: 0x%04x 0x%04x 0x%04x 0x%04x\n"
  72                "LSA = %04x%08x IPGVR = 0x%04x\n"
  73                "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
  74                "OCTX = 0x%08x OCRX = 0x%08x IPCR = 0x%08x\n",
  75                dev->ofdev->node->full_name, in_be32(&p->mr0), in_be32(&p->mr1),
  76                in_be32(&p->tmr0), in_be32(&p->tmr1),
  77                in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
  78                in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
  79                in_be32(&p->vtci),
  80                in_be32(&p->iaht1), in_be32(&p->iaht2), in_be32(&p->iaht3),
  81                in_be32(&p->iaht4),
  82                in_be32(&p->gaht1), in_be32(&p->gaht2), in_be32(&p->gaht3),
  83                in_be32(&p->gaht4),
  84                in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
  85                in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
  86                in_be32(&p->octx), in_be32(&p->ocrx), in_be32(&p->ipcr)
  87             );
  88
  89         emac_desc_dump(dev);
  90 }
  91
  92 static void emac_mal_dump(struct mal_instance *mal)
  93 {
  94         int i;
  95
  96         printk("** MAL %s Registers **\n"
  97                "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
  98                "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
  99                "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
 100                mal->ofdev->node->full_name,
 101                get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
 102                get_mal_dcrn(mal, MAL_IER),
 103                get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
 104                get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
 105                get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
 106                get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
 107             );
 108
 109         printk("TX|");
 110         for (i = 0; i < mal->num_tx_chans; ++i) {
 111                 if (i && !(i % 4))
 112                         printk("\n   ");
 113                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
 114         }
 115         printk("\nRX|");
 116         for (i = 0; i < mal->num_rx_chans; ++i) {
 117                 if (i && !(i % 4))
 118                         printk("\n   ");
 119                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
 120         }
 121         printk("\n   ");
 122         for (i = 0; i < mal->num_rx_chans; ++i) {
 123                 u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
 124                 if (i && !(i % 3))
 125                         printk("\n   ");
 126                 printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
 127         }
 128         printk("\n");
 129 }
 130
 131 static struct emac_instance *__emacs[4];
 132 static struct mal_instance *__mals[1];
 133
 134 void emac_dbg_register(struct emac_instance *dev)
 135 {
 136         unsigned long flags;
 137         int i;
 138
 139         spin_lock_irqsave(&emac_dbg_lock, flags);
 140         for (i = 0; i < ARRAY_SIZE(__emacs); i++)
 141                 if (__emacs[i] == NULL) {
 142                         __emacs[i] = dev;
 143                         break;
 144                 }
 145         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 146 }
 147
 148 void emac_dbg_unregister(struct emac_instance *dev)
 149 {
 150         unsigned long flags;
 151         int i;
 152
 153         spin_lock_irqsave(&emac_dbg_lock, flags);
 154         for (i = 0; i < ARRAY_SIZE(__emacs); i++)
 155                 if (__emacs[i] == dev) {
 156                         __emacs[i] = NULL;
 157                         break;
 158                 }
 159         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 160 }
 161
 162 void mal_dbg_register(struct mal_instance *mal)
 163 {
 164         unsigned long flags;
 165         int i;
 166
 167         spin_lock_irqsave(&emac_dbg_lock, flags);
 168         for (i = 0; i < ARRAY_SIZE(__mals); i++)
 169                 if (__mals[i] == NULL) {
 170                         __mals[i] = mal;
 171                         break;
 172                 }
 173         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 174 }
 175
 176 void mal_dbg_unregister(struct mal_instance *mal)
 177 {
 178         unsigned long flags;
 179         int i;
 180
 181         spin_lock_irqsave(&emac_dbg_lock, flags);
 182         for (i = 0; i < ARRAY_SIZE(__mals); i++)
 183                 if (__mals[i] == mal) {
 184                         __mals[i] = NULL;
 185                         break;
 186                 }
 187         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 188 }
 189
 190 void emac_dbg_dump_all(void)
 191 {
 192         unsigned int i;
 193         unsigned long flags;
 194
 195         spin_lock_irqsave(&emac_dbg_lock, flags);
 196
 197         for (i = 0; i < ARRAY_SIZE(__mals); ++i)
 198                 if (__mals[i])
 199                         emac_mal_dump(__mals[i]);
 200
 201         for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
 202                 if (__emacs[i])
 203                         emac_mac_dump(__emacs[i]);
 204
 205         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 206 }
 207
 208 #if defined(CONFIG_MAGIC_SYSRQ)
 209 static void emac_sysrq_handler(int key, struct tty_struct *tty)
 210 {
 211         emac_dbg_dump_all();
 212 }
 213
 214 static struct sysrq_key_op emac_sysrq_op = {
 215         .handler = emac_sysrq_handler,
 216         .help_msg = "emaC",
 217         .action_msg = "Show EMAC(s) status",
 218 };
 219
 220 int __init emac_init_debug(void)
 221 {
 222         return register_sysrq_key('c', &emac_sysrq_op);
 223 }
 224
 225 void __exit emac_fini_debug(void)
 226 {
 227         unregister_sysrq_key('c', &emac_sysrq_op);
 228 }
 229
 230 #else
 231 int __init emac_init_debug(void)
 232 {
 233         return 0;
 234 }
 235 void __exit emac_fini_debug(void)
 236 {
 237 }
 238 #endif                          /* CONFIG_MAGIC_SYSRQ */