diff options
Diffstat (limited to 'arch/mips/sibyte/sb1250/bus_watcher.c')
| -rw-r--r-- | arch/mips/sibyte/sb1250/bus_watcher.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/arch/mips/sibyte/sb1250/bus_watcher.c b/arch/mips/sibyte/sb1250/bus_watcher.c deleted file mode 100644 index 45274bd3cd8..00000000000 --- a/arch/mips/sibyte/sb1250/bus_watcher.c +++ /dev/null @@ -1,258 +0,0 @@ -/* - * Copyright (C) 2002,2003 Broadcom Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * The Bus Watcher monitors internal bus transactions and maintains - * counts of transactions with error status, logging details and - * causing one of several interrupts. This driver provides a handler - * for those interrupts which aggregates the counts (to avoid - * saturating the 8-bit counters) and provides a presence in - * /proc/bus_watcher if PROC_FS is on. - */ - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/proc_fs.h> -#include <asm/system.h> -#include <asm/io.h> - -#include <asm/sibyte/sb1250.h> -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/sb1250_int.h> -#include <asm/sibyte/sb1250_scd.h> - - -struct bw_stats_struct { - uint64_t status; - uint32_t l2_err; - uint32_t memio_err; - int status_printed; - unsigned long l2_cor_d; - unsigned long l2_bad_d; - unsigned long l2_cor_t; - unsigned long l2_bad_t; - unsigned long mem_cor_d; - unsigned long mem_bad_d; - unsigned long bus_error; -} bw_stats; - - -static void print_summary(uint32_t status, uint32_t l2_err, - uint32_t memio_err) -{ - printk("Bus watcher error counters: %08x %08x\n", l2_err, memio_err); - printk("\nLast recorded signature:\n"); - printk("Request %02x from %d, answered by %d with Dcode %d\n", - (unsigned int)(G_SCD_BERR_TID(status) & 0x3f), - (int)(G_SCD_BERR_TID(status) >> 6), - (int)G_SCD_BERR_RID(status), - (int)G_SCD_BERR_DCODE(status)); -} - -/* - * check_bus_watcher is exported for use in situations where we want - * to see the most recent status of the bus watcher, which might have - * already been destructively read out of the registers. - * - * notes: this is currently used by the cache error handler - * should provide locking against the interrupt handler - */ -void check_bus_watcher(void) -{ - u32 status, l2_err, memio_err; - -#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS - /* Destructive read, clears register and interrupt */ - status = csr_in32(IOADDR(A_SCD_BUS_ERR_STATUS)); -#else - /* Use non-destructive register */ - status = csr_in32(IOADDR(A_SCD_BUS_ERR_STATUS_DEBUG)); -#endif - if (!(status & 0x7fffffff)) { - printk("Using last values reaped by bus watcher driver\n"); - status = bw_stats.status; - l2_err = bw_stats.l2_err; - memio_err = bw_stats.memio_err; - } else { - l2_err = csr_in32(IOADDR(A_BUS_L2_ERRORS)); - memio_err = csr_in32(IOADDR(A_BUS_MEM_IO_ERRORS)); - } - if (status & ~(1UL << 31)) - print_summary(status, l2_err, memio_err); - else - printk("Bus watcher indicates no error\n"); -} - -static int bw_print_buffer(char *page, struct bw_stats_struct *stats) -{ - int len; - - len = sprintf(page, "SiByte Bus Watcher statistics\n"); - len += sprintf(page+len, "-----------------------------\n"); - len += sprintf(page+len, "L2-d-cor %8ld\nL2-d-bad %8ld\n", - stats->l2_cor_d, stats->l2_bad_d); - len += sprintf(page+len, "L2-t-cor %8ld\nL2-t-bad %8ld\n", - stats->l2_cor_t, stats->l2_bad_t); - len += sprintf(page+len, "MC-d-cor %8ld\nMC-d-bad %8ld\n", - stats->mem_cor_d, stats->mem_bad_d); - len += sprintf(page+len, "IO-err %8ld\n", stats->bus_error); - len += sprintf(page+len, "\nLast recorded signature:\n"); - len += sprintf(page+len, "Request %02x from %d, answered by %d with Dcode %d\n", - (unsigned int)(G_SCD_BERR_TID(stats->status) & 0x3f), - (int)(G_SCD_BERR_TID(stats->status) >> 6), - (int)G_SCD_BERR_RID(stats->status), - (int)G_SCD_BERR_DCODE(stats->status)); - /* XXXKW indicate multiple errors between printings, or stats - collection (or both)? */ - if (stats->status & M_SCD_BERR_MULTERRS) - len += sprintf(page+len, "Multiple errors observed since last check.\n"); - if (stats->status_printed) { - len += sprintf(page+len, "(no change since last printing)\n"); - } else { - stats->status_printed = 1; - } - - return len; -} - -#ifdef CONFIG_PROC_FS - -/* For simplicity, I want to assume a single read is required each - time */ -static int bw_read_proc(char *page, char **start, off_t off, - int count, int *eof, void *data) -{ - int len; - - if (off == 0) { - len = bw_print_buffer(page, data); - *start = page; - } else { - len = 0; - *eof = 1; - } - return len; -} - -static void create_proc_decoder(struct bw_stats_struct *stats) -{ - struct proc_dir_entry *ent; - - ent = create_proc_read_entry("bus_watcher", S_IWUSR | S_IRUGO, NULL, - bw_read_proc, stats); - if (!ent) { - printk(KERN_INFO "Unable to initialize bus_watcher /proc entry\n"); - return; - } -} - -#endif /* CONFIG_PROC_FS */ - -/* - * sibyte_bw_int - handle bus watcher interrupts and accumulate counts - * - * notes: possible re-entry due to multiple sources - * should check/indicate saturation - */ -static irqreturn_t sibyte_bw_int(int irq, void *data) -{ - struct bw_stats_struct *stats = data; - unsigned long cntr; -#ifdef CONFIG_SIBYTE_BW_TRACE - int i; -#endif -#ifndef CONFIG_PROC_FS - char bw_buf[1024]; -#endif - -#ifdef CONFIG_SIBYTE_BW_TRACE - csr_out32(M_SCD_TRACE_CFG_FREEZE, IOADDR(A_SCD_TRACE_CFG)); - csr_out32(M_SCD_TRACE_CFG_START_READ, IOADDR(A_SCD_TRACE_CFG)); - - for (i=0; i<256*6; i++) - printk("%016llx\n", - (long long)__raw_readq(IOADDR(A_SCD_TRACE_READ))); - - csr_out32(M_SCD_TRACE_CFG_RESET, IOADDR(A_SCD_TRACE_CFG)); - csr_out32(M_SCD_TRACE_CFG_START, IOADDR(A_SCD_TRACE_CFG)); -#endif - - /* Destructive read, clears register and interrupt */ - stats->status = csr_in32(IOADDR(A_SCD_BUS_ERR_STATUS)); - stats->status_printed = 0; - - stats->l2_err = cntr = csr_in32(IOADDR(A_BUS_L2_ERRORS)); - stats->l2_cor_d += G_SCD_L2ECC_CORR_D(cntr); - stats->l2_bad_d += G_SCD_L2ECC_BAD_D(cntr); - stats->l2_cor_t += G_SCD_L2ECC_CORR_T(cntr); - stats->l2_bad_t += G_SCD_L2ECC_BAD_T(cntr); - csr_out32(0, IOADDR(A_BUS_L2_ERRORS)); - - stats->memio_err = cntr = csr_in32(IOADDR(A_BUS_MEM_IO_ERRORS)); - stats->mem_cor_d += G_SCD_MEM_ECC_CORR(cntr); - stats->mem_bad_d += G_SCD_MEM_ECC_BAD(cntr); - stats->bus_error += G_SCD_MEM_BUSERR(cntr); - csr_out32(0, IOADDR(A_BUS_MEM_IO_ERRORS)); - -#ifndef CONFIG_PROC_FS - bw_print_buffer(bw_buf, stats); - printk(bw_buf); -#endif - - return IRQ_HANDLED; -} - -int __init sibyte_bus_watcher(void) -{ - memset(&bw_stats, 0, sizeof(struct bw_stats_struct)); - bw_stats.status_printed = 1; - - if (request_irq(K_INT_BAD_ECC, sibyte_bw_int, 0, "Bus watcher", &bw_stats)) { - printk("Failed to register bus watcher BAD_ECC irq\n"); - return -1; - } - if (request_irq(K_INT_COR_ECC, sibyte_bw_int, 0, "Bus watcher", &bw_stats)) { - free_irq(K_INT_BAD_ECC, &bw_stats); - printk("Failed to register bus watcher COR_ECC irq\n"); - return -1; - } - if (request_irq(K_INT_IO_BUS, sibyte_bw_int, 0, "Bus watcher", &bw_stats)) { - free_irq(K_INT_BAD_ECC, &bw_stats); - free_irq(K_INT_COR_ECC, &bw_stats); - printk("Failed to register bus watcher IO_BUS irq\n"); - return -1; - } - -#ifdef CONFIG_PROC_FS - create_proc_decoder(&bw_stats); -#endif - -#ifdef CONFIG_SIBYTE_BW_TRACE - csr_out32((M_SCD_TRSEQ_ASAMPLE | M_SCD_TRSEQ_DSAMPLE | - K_SCD_TRSEQ_TRIGGER_ALL), - IOADDR(A_SCD_TRACE_SEQUENCE_0)); - csr_out32(M_SCD_TRACE_CFG_RESET, IOADDR(A_SCD_TRACE_CFG)); - csr_out32(M_SCD_TRACE_CFG_START, IOADDR(A_SCD_TRACE_CFG)); -#endif - - return 0; -} - -__initcall(sibyte_bus_watcher); |