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   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         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->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                );
  86
  87         if (emac4sync)
  88                 printk("MAR = %04x%08x MMAR = %04x%08x\n",
  89                        in_be32(&p->u0.emac4sync.mahr),
  90                        in_be32(&p->u0.emac4sync.malr),
  91                        in_be32(&p->u0.emac4sync.mmahr),
  92                        in_be32(&p->u0.emac4sync.mmalr)
  93                        );
  94
  95         for (n = 0; n < xaht_regs; n++)
  96                 printk("IAHT%02d = 0x%08x\n", n + 1, in_be32(iaht_base + n));
  97
  98         for (n = 0; n < xaht_regs; n++)
  99                 printk("GAHT%02d = 0x%08x\n", n + 1, in_be32(gaht_base + n));
 100
 101         printk("LSA = %04x%08x IPGVR = 0x%04x\n"
 102                "STACR = 0x%08x TRTR = 0x%08x RWMR = 0x%08x\n"
 103                "OCTX = 0x%08x OCRX = 0x%08x\n",
 104                in_be32(&p->lsah), in_be32(&p->lsal), in_be32(&p->ipgvr),
 105                in_be32(&p->stacr), in_be32(&p->trtr), in_be32(&p->rwmr),
 106                in_be32(&p->octx), in_be32(&p->ocrx)
 107                );
 108
 109         if (!emac4sync) {
 110                 printk("IPCR = 0x%08x\n",
 111                        in_be32(&p->u1.emac4.ipcr)
 112                        );
 113         } else {
 114                 printk("REVID = 0x%08x TPC = 0x%08x\n",
 115                        in_be32(&p->u1.emac4sync.revid),
 116                        in_be32(&p->u1.emac4sync.tpc)
 117                        );
 118         }
 119
 120         emac_desc_dump(dev);
 121 }
 122
 123 static void emac_mal_dump(struct mal_instance *mal)
 124 {
 125         int i;
 126
 127         printk("** MAL %s Registers **\n"
 128                "CFG = 0x%08x ESR = 0x%08x IER = 0x%08x\n"
 129                "TX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n"
 130                "RX|CASR = 0x%08x CARR = 0x%08x EOBISR = 0x%08x DEIR = 0x%08x\n",
 131                mal->ofdev->node->full_name,
 132                get_mal_dcrn(mal, MAL_CFG), get_mal_dcrn(mal, MAL_ESR),
 133                get_mal_dcrn(mal, MAL_IER),
 134                get_mal_dcrn(mal, MAL_TXCASR), get_mal_dcrn(mal, MAL_TXCARR),
 135                get_mal_dcrn(mal, MAL_TXEOBISR), get_mal_dcrn(mal, MAL_TXDEIR),
 136                get_mal_dcrn(mal, MAL_RXCASR), get_mal_dcrn(mal, MAL_RXCARR),
 137                get_mal_dcrn(mal, MAL_RXEOBISR), get_mal_dcrn(mal, MAL_RXDEIR)
 138             );
 139
 140         printk("TX|");
 141         for (i = 0; i < mal->num_tx_chans; ++i) {
 142                 if (i && !(i % 4))
 143                         printk("\n   ");
 144                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_TXCTPR(i)));
 145         }
 146         printk("\nRX|");
 147         for (i = 0; i < mal->num_rx_chans; ++i) {
 148                 if (i && !(i % 4))
 149                         printk("\n   ");
 150                 printk("CTP%d = 0x%08x ", i, get_mal_dcrn(mal, MAL_RXCTPR(i)));
 151         }
 152         printk("\n   ");
 153         for (i = 0; i < mal->num_rx_chans; ++i) {
 154                 u32 r = get_mal_dcrn(mal, MAL_RCBS(i));
 155                 if (i && !(i % 3))
 156                         printk("\n   ");
 157                 printk("RCBS%d = 0x%08x (%d) ", i, r, r * 16);
 158         }
 159         printk("\n");
 160 }
 161
 162 static struct emac_instance *__emacs[4];
 163 static struct mal_instance *__mals[1];
 164
 165 void emac_dbg_register(struct emac_instance *dev)
 166 {
 167         unsigned long flags;
 168         int i;
 169
 170         spin_lock_irqsave(&emac_dbg_lock, flags);
 171         for (i = 0; i < ARRAY_SIZE(__emacs); i++)
 172                 if (__emacs[i] == NULL) {
 173                         __emacs[i] = dev;
 174                         break;
 175                 }
 176         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 177 }
 178
 179 void emac_dbg_unregister(struct emac_instance *dev)
 180 {
 181         unsigned long flags;
 182         int i;
 183
 184         spin_lock_irqsave(&emac_dbg_lock, flags);
 185         for (i = 0; i < ARRAY_SIZE(__emacs); i++)
 186                 if (__emacs[i] == dev) {
 187                         __emacs[i] = NULL;
 188                         break;
 189                 }
 190         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 191 }
 192
 193 void mal_dbg_register(struct mal_instance *mal)
 194 {
 195         unsigned long flags;
 196         int i;
 197
 198         spin_lock_irqsave(&emac_dbg_lock, flags);
 199         for (i = 0; i < ARRAY_SIZE(__mals); i++)
 200                 if (__mals[i] == NULL) {
 201                         __mals[i] = mal;
 202                         break;
 203                 }
 204         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 205 }
 206
 207 void mal_dbg_unregister(struct mal_instance *mal)
 208 {
 209         unsigned long flags;
 210         int i;
 211
 212         spin_lock_irqsave(&emac_dbg_lock, flags);
 213         for (i = 0; i < ARRAY_SIZE(__mals); i++)
 214                 if (__mals[i] == mal) {
 215                         __mals[i] = NULL;
 216                         break;
 217                 }
 218         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 219 }
 220
 221 void emac_dbg_dump_all(void)
 222 {
 223         unsigned int i;
 224         unsigned long flags;
 225
 226         spin_lock_irqsave(&emac_dbg_lock, flags);
 227
 228         for (i = 0; i < ARRAY_SIZE(__mals); ++i)
 229                 if (__mals[i])
 230                         emac_mal_dump(__mals[i]);
 231
 232         for (i = 0; i < ARRAY_SIZE(__emacs); ++i)
 233                 if (__emacs[i])
 234                         emac_mac_dump(__emacs[i]);
 235
 236         spin_unlock_irqrestore(&emac_dbg_lock, flags);
 237 }
 238
 239 #if defined(CONFIG_MAGIC_SYSRQ)
 240 static void emac_sysrq_handler(int key, struct tty_struct *tty)
 241 {
 242         emac_dbg_dump_all();
 243 }
 244
 245 static struct sysrq_key_op emac_sysrq_op = {
 246         .handler = emac_sysrq_handler,
 247         .help_msg = "emaC",
 248         .action_msg = "Show EMAC(s) status",
 249 };
 250
 251 int __init emac_init_debug(void)
 252 {
 253         return register_sysrq_key('c', &emac_sysrq_op);
 254 }
 255
 256 void __exit emac_fini_debug(void)
 257 {
 258         unregister_sysrq_key('c', &emac_sysrq_op);
 259 }
 260
 261 #else
 262 int __init emac_init_debug(void)
 263 {
 264         return 0;
 265 }
 266 void __exit emac_fini_debug(void)
 267 {
 268 }
 269 #endif                          /* CONFIG_MAGIC_SYSRQ */