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->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
  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
 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
 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
 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
 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
 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
 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)
 241 static void emac_sysrq_handler(int key, struct tty_struct *tty)
 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
 252 int __init emac_init_debug(void)
 253 {
 254         return register_sysrq_key('c', &emac_sysrq_op);
 255 }
 256
 257 void __exit emac_fini_debug(void)
 258 {
 259         unregister_sysrq_key('c', &emac_sysrq_op);
 260 }
 261
 262 #else
 263 int __init emac_init_debug(void)
 264 {
 265         return 0;
 266 }
 267 void __exit emac_fini_debug(void)
 268 {
 269 }
 270 #endif                          /* CONFIG_MAGIC_SYSRQ */