--- /dev/null
+/*
+ * 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 <linux/seq_file.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>
+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+#include <asm/sibyte/bcm1480_regs.h>
+#endif
+
+
+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));
+#elif defined(CONFIG_SIBYTE_BCM112X) || defined(CONFIG_SIBYTE_SB1250)
+ /* Use non-destructive register */
+ status = csr_in32(IOADDR(A_SCD_BUS_ERR_STATUS_DEBUG));
+#elif defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
+ /* Use non-destructive register */
+ /* Same as 1250 except BUS_ERR_STATUS_DEBUG is in a different place. */
+ status = csr_in32(IOADDR(A_BCM1480_BUS_ERR_STATUS_DEBUG));
+#else
+#error bus watcher being built for unknown Sibyte SOC!
+#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");
+}
+
+#ifdef CONFIG_PROC_FS
+
+/* For simplicity, I want to assume a single read is required each
+ time */
+static int bw_proc_show(struct seq_file *m, void *v)
+{
+ struct bw_stats_struct *stats = m->private;
+
+ seq_puts(m, "SiByte Bus Watcher statistics\n");
+ seq_puts(m, "-----------------------------\n");
+ seq_printf(m, "L2-d-cor %8ld\nL2-d-bad %8ld\n",
+ stats->l2_cor_d, stats->l2_bad_d);
+ seq_printf(m, "L2-t-cor %8ld\nL2-t-bad %8ld\n",
+ stats->l2_cor_t, stats->l2_bad_t);
+ seq_printf(m, "MC-d-cor %8ld\nMC-d-bad %8ld\n",
+ stats->mem_cor_d, stats->mem_bad_d);
+ seq_printf(m, "IO-err %8ld\n", stats->bus_error);
+ seq_puts(m, "\nLast recorded signature:\n");
+ seq_printf(m, "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)
+ seq_puts(m, "Multiple errors observed since last check.\n");
+ if (stats->status_printed) {
+ seq_puts(m, "(no change since last printing)\n");
+ } else {
+ stats->status_printed = 1;
+ }
+
+ return 0;
+}
+
+static int bw_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, bw_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations bw_proc_fops = {
+ .open = bw_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void create_proc_decoder(struct bw_stats_struct *stats)
+{
+ struct proc_dir_entry *ent;
+
+ ent = proc_create_data("bus_watcher", S_IWUSR | S_IRUGO, NULL,
+ &bw_proc_fops, 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
+
+#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));
+
+ 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);
+++ /dev/null
-/*
- * 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 <linux/seq_file.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");
-}
-
-#ifdef CONFIG_PROC_FS
-
-/* For simplicity, I want to assume a single read is required each
- time */
-static int bw_proc_show(struct seq_file *m, void *v)
-{
- struct bw_stats_struct *stats = m->private;
-
- seq_puts(m, "SiByte Bus Watcher statistics\n");
- seq_puts(m, "-----------------------------\n");
- seq_printf(m, "L2-d-cor %8ld\nL2-d-bad %8ld\n",
- stats->l2_cor_d, stats->l2_bad_d);
- seq_printf(m, "L2-t-cor %8ld\nL2-t-bad %8ld\n",
- stats->l2_cor_t, stats->l2_bad_t);
- seq_printf(m, "MC-d-cor %8ld\nMC-d-bad %8ld\n",
- stats->mem_cor_d, stats->mem_bad_d);
- seq_printf(m, "IO-err %8ld\n", stats->bus_error);
- seq_puts(m, "\nLast recorded signature:\n");
- seq_printf(m, "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)
- seq_puts(m, "Multiple errors observed since last check.\n");
- if (stats->status_printed) {
- seq_puts(m, "(no change since last printing)\n");
- } else {
- stats->status_printed = 1;
- }
-
- return 0;
-}
-
-static int bw_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, bw_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations bw_proc_fops = {
- .open = bw_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static void create_proc_decoder(struct bw_stats_struct *stats)
-{
- struct proc_dir_entry *ent;
-
- ent = proc_create_data("bus_watcher", S_IWUSR | S_IRUGO, NULL,
- &bw_proc_fops, 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
-
-#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));
-
- 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);
projects / deliverable / linux.git / commitdiff
