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