drivers/net/ibm_emac/ibm_emac_debug.c

   1 /*
   2  * drivers/net/ibm_emac/ibm_emac_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/config.h>
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/sysrq.h>
  21 #include <asm/io.h>
  22
  23 #include "ibm_emac_core.h"
  24
  25 static void emac_desc_dump(int idx, struct ocp_enet_private *p)
  26 {
  27         int i;
  28         printk("** EMAC%d TX BDs **\n"
  29                " tx_cnt = %d tx_slot = %d ack_slot = %d\n",
  30                idx, p->tx_cnt, p->tx_slot, p->ack_slot);
  31         for (i = 0; i < NUM_TX_BUFF / 2; ++i)
  32                 printk
  33                     ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
  34                      i, p->tx_desc[i].data_ptr, p->tx_skb[i] ? 'V' : ' ',
  35                      p->tx_desc[i].ctrl, p->tx_desc[i].data_len,
  36                      NUM_TX_BUFF / 2 + i,
  37                      p->tx_desc[NUM_TX_BUFF / 2 + i].data_ptr,
  38                      p->tx_skb[NUM_TX_BUFF / 2 + i] ? 'V' : ' ',
  39                      p->tx_desc[NUM_TX_BUFF / 2 + i].ctrl,
  40                      p->tx_desc[NUM_TX_BUFF / 2 + i].data_len);
  41
  42         printk("** EMAC%d RX BDs **\n"
  43                " rx_slot = %d rx_stopped = %d rx_skb_size = %d rx_sync_size = %d\n"
  44                " rx_sg_skb = 0x%p\n",
  45                idx, p->rx_slot, p->commac.rx_stopped, p->rx_skb_size,
  46                p->rx_sync_size, p->rx_sg_skb);
  47         for (i = 0; i < NUM_RX_BUFF / 2; ++i)
  48                 printk
  49                     ("bd[%2d] 0x%08x %c 0x%04x %4u - bd[%2d] 0x%08x %c 0x%04x %4u\n",
  50                      i, p->rx_desc[i].data_ptr, p->rx_skb[i] ? 'V' : ' ',
  51                      p->rx_desc[i].ctrl, p->rx_desc[i].data_len,
  52                      NUM_RX_BUFF / 2 + i,
  53                      p->rx_desc[NUM_RX_BUFF / 2 + i].data_ptr,
  54                      p->rx_skb[NUM_RX_BUFF / 2 + i] ? 'V' : ' ',
  55                      p->rx_desc[NUM_RX_BUFF / 2 + i].ctrl,
  56                      p->rx_desc[NUM_RX_BUFF / 2 + i].data_len);
  57 }
  58
  59 static void emac_mac_dump(int idx, struct ocp_enet_private *dev)
  60 {
  61         struct emac_regs __iomem *p = dev->emacp;
  62
  63         printk("** EMAC%d registers **\n"
  64                "MR0 = 0x%08x MR1 = 0x%08x TMR0 = 0x%08x TMR1 = 0x%08x\n"
  65                "RMR = 0x%08x ISR = 0x%08x ISER = 0x%08x\n"
  66                "IAR = %04x%08x VTPID = 0x%04x VTCI = 0x%04x\n"
  67                "IAHT: 0x%04x 0x%04x 0x%04x 0x%04x "
  68                "GAHT: 0x%04x 0x%04x 0x%04x 0x%04x\n"
  69                "LSA = %04x%08x IPGVR = 0x%04x\n"
  70                "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
  71                "OCTX = 0x%08x OCRX = 0x%08x IPCR = 0x%08x\n",
  72                idx, in_be32(&p->mr0), in_be32(&p->mr1),
  73                in_be32(&p->tmr0), in_be32(&p->tmr1),
  74                in_be32(&p->rmr), in_be32(&p->isr), in_be32(&p->iser),
  75                in_be32(&p->iahr), in_be32(&p->ialr), in_be32(&p->vtpid),
  76                in_be32(&p->vtci),
  77                in_be32(&p->iaht1), in_be32(&p->iaht2), in_be32(&p->iaht3),
  78                in_be32(&p->iaht4),
  79                in_be32(&p->gaht1), in_be32(&p->gaht2), in_be32(&p->gaht3),
  80                in_be32(&p->gaht4),
  81                in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
  82                in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
  83                in_be32(&p->octx), in_be32(&p->ocrx), in_be32(&p->ipcr)
  84             );
  85
  86         emac_desc_dump(idx, dev);
  87 }
  88
  89 static void emac_mal_dump(struct ibm_ocp_mal *mal)
  90 {
  91         struct ocp_func_mal_data *maldata = mal->def->additions;
  92         int i;
  93
  94         printk("** MAL%d Registers **\n"
  95                "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
  96                "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
  97                "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
  98                mal->def->index,
  99                get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
 100                get_mal_dcrn(mal, MAL_IER),
 101                get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
 102                get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
 103                get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
 104                get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
 105             );
 106
 107         printk("TX|");
 108         for (i = 0; i < maldata->num_tx_chans; ++i) {
 109                 if (i && !(i % 4))
 110                         printk("\n   ");
 111                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
 112         }
 113         printk("\nRX|");
 114         for (i = 0; i < maldata->num_rx_chans; ++i) {
 115                 if (i && !(i % 4))
 116                         printk("\n   ");
 117                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
 118         }
 119         printk("\n   ");
 120         for (i = 0; i < maldata->num_rx_chans; ++i) {
 121                 u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
 122                 if (i && !(i % 3))
 123                         printk("\n   ");
 124                 printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
 125         }
 126         printk("\n");
 127 }
 128
 129 static struct ocp_enet_private *__emacs[4];
 130 static struct ibm_ocp_mal *__mals[1];
 131
 132 void emac_dbg_register(int idx, struct ocp_enet_private *dev)
 133 {
 134         unsigned long flags;
 135
 136         if (idx >= sizeof(__emacs) / sizeof(__emacs[0])) {
 137                 printk(KERN_WARNING
 138                        "invalid index %d when registering EMAC for debugging\n",
 139                        idx);
 140                 return;
 141         }
 142
 143         local_irq_save(flags);
 144         __emacs[idx] = dev;
 145         local_irq_restore(flags);
 146 }
 147
 148 void mal_dbg_register(int idx, struct ibm_ocp_mal *mal)
 149 {
 150         unsigned long flags;
 151
 152         if (idx >= sizeof(__mals) / sizeof(__mals[0])) {
 153                 printk(KERN_WARNING
 154                        "invalid index %d when registering MAL for debugging\n",
 155                        idx);
 156                 return;
 157         }
 158
 159         local_irq_save(flags);
 160         __mals[idx] = mal;
 161         local_irq_restore(flags);
 162 }
 163
 164 void emac_dbg_dump_all(void)
 165 {
 166         unsigned int i;
 167         unsigned long flags;
 168
 169         local_irq_save(flags);
 170
 171         for (i = 0; i < sizeof(__mals) / sizeof(__mals[0]); ++i)
 172                 if (__mals[i])
 173                         emac_mal_dump(__mals[i]);
 174
 175         for (i = 0; i < sizeof(__emacs) / sizeof(__emacs[0]); ++i)
 176                 if (__emacs[i])
 177                         emac_mac_dump(i, __emacs[i]);
 178
 179         local_irq_restore(flags);
 180 }
 181
 182 #if defined(CONFIG_MAGIC_SYSRQ)
 183 static void emac_sysrq_handler(int key, struct pt_regs *pt_regs,
 184                                struct tty_struct *tty)
 185 {
 186         emac_dbg_dump_all();
 187 }
 188
 189 static struct sysrq_key_op emac_sysrq_op = {
 190         .handler = emac_sysrq_handler,
 191         .help_msg = "emaC",
 192         .action_msg = "Show EMAC(s) status",
 193 };
 194
 195 int __init emac_init_debug(void)
 196 {
 197         return register_sysrq_key('c', &emac_sysrq_op);
 198 }
 199
 200 void __exit emac_fini_debug(void)
 201 {
 202         unregister_sysrq_key('c', &emac_sysrq_op);
 203 }
 204
 205 #else
 206 int __init emac_init_debug(void)
 207 {
 208         return 0;
 209 }
 210 void __exit emac_fini_debug(void)
 211 {
 212 }
 213 #endif                          /* CONFIG_MAGIC_SYSRQ */