#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-boot-vector.h>
+#include <asm/octeon/cvmx-ciu2-defs.h>
+#include <asm/octeon/cvmx-rst-defs.h>
+
+/* Watchdog interrupt major block number (8 MSBs of intsn) */
+#define WD_BLOCK_NUMBER 0x01
+
+static int divisor;
/* The count needed to achieve timeout_sec. */
static unsigned int timeout_cnt;
#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
+#define CVMX_GSERX_SCRATCH(offset) (CVMX_ADD_IO_SEG(0x0001180090000020ull) + ((offset) & 15) * 0x1000000ull)
+
static int heartbeat = WD_TIMO;
module_param(heartbeat, int, 0444);
MODULE_PARM_DESC(heartbeat,
static int cpu2core(int cpu)
{
#ifdef CONFIG_SMP
- return cpu_logical_map(cpu);
+ return cpu_logical_map(cpu) & 0x3f;
#else
return cvmx_get_core_num();
#endif
}
-static int core2cpu(int coreid)
-{
-#ifdef CONFIG_SMP
- return cpu_number_map(coreid);
-#else
- return 0;
-#endif
-}
-
/**
* Poke the watchdog when an interrupt is received
*
*/
static irqreturn_t octeon_wdt_poke_irq(int cpl, void *dev_id)
{
- unsigned int core = cvmx_get_core_num();
- int cpu = core2cpu(core);
+ int cpu = raw_smp_processor_id();
+ unsigned int core = cpu2core(cpu);
+ int node = cpu_to_node(cpu);
if (do_countdown) {
if (per_cpu_countdown[cpu] > 0) {
/* We're alive, poke the watchdog */
- cvmx_write_csr(CVMX_CIU_PP_POKEX(core), 1);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(core), 1);
per_cpu_countdown[cpu]--;
} else {
/* Bad news, you are about to reboot. */
}
} else {
/* Not open, just ping away... */
- cvmx_write_csr(CVMX_CIU_PP_POKEX(core), 1);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(core), 1);
}
return IRQ_HANDLED;
}
u64 cp0_epc = read_c0_epc();
/* Delay so output from all cores output is not jumbled together. */
- __delay(100000000ull * coreid);
+ udelay(85000 * coreid);
octeon_wdt_write_string("\r\n*** NMI Watchdog interrupt on Core 0x");
- octeon_wdt_write_hex(coreid, 1);
+ octeon_wdt_write_hex(coreid, 2);
octeon_wdt_write_string(" ***\r\n");
for (i = 0; i < 32; i++) {
octeon_wdt_write_string("\t");
octeon_wdt_write_hex(cp0_cause, 16);
octeon_wdt_write_string("\r\n");
- octeon_wdt_write_string("\tsum0\t0x");
- octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU_INTX_SUM0(coreid * 2)), 16);
- octeon_wdt_write_string("\ten0\t0x");
- octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)), 16);
- octeon_wdt_write_string("\r\n");
+ /* The CIU register is different for each Octeon model. */
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
+ octeon_wdt_write_string("\tsrc_wd\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU2_SRC_PPX_IP2_WDOG(coreid)), 16);
+ octeon_wdt_write_string("\ten_wd\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU2_EN_PPX_IP2_WDOG(coreid)), 16);
+ octeon_wdt_write_string("\r\n");
+ octeon_wdt_write_string("\tsrc_rml\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU2_SRC_PPX_IP2_RML(coreid)), 16);
+ octeon_wdt_write_string("\ten_rml\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU2_EN_PPX_IP2_RML(coreid)), 16);
+ octeon_wdt_write_string("\r\n");
+ octeon_wdt_write_string("\tsum\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(coreid)), 16);
+ octeon_wdt_write_string("\r\n");
+ } else if (!octeon_has_feature(OCTEON_FEATURE_CIU3)) {
+ octeon_wdt_write_string("\tsum0\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU_INTX_SUM0(coreid * 2)), 16);
+ octeon_wdt_write_string("\ten0\t0x");
+ octeon_wdt_write_hex(cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2)), 16);
+ octeon_wdt_write_string("\r\n");
+ }
octeon_wdt_write_string("*** Chip soft reset soon ***\r\n");
+
+ /*
+ * G-30204: We must trigger a soft reset before watchdog
+ * does an incomplete job of doing it.
+ */
+ if (OCTEON_IS_OCTEON3() && !OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ u64 scr;
+ unsigned int node = cvmx_get_node_num();
+ unsigned int lcore = cvmx_get_local_core_num();
+ union cvmx_ciu_wdogx ciu_wdog;
+
+ /*
+ * Wait for other cores to print out information, but
+ * not too long. Do the soft reset before watchdog
+ * can trigger it.
+ */
+ do {
+ ciu_wdog.u64 = cvmx_read_csr_node(node, CVMX_CIU_WDOGX(lcore));
+ } while (ciu_wdog.s.cnt > 0x10000);
+
+ scr = cvmx_read_csr_node(0, CVMX_GSERX_SCRATCH(0));
+ scr |= 1 << 11; /* Indicate watchdog in bit 11 */
+ cvmx_write_csr_node(0, CVMX_GSERX_SCRATCH(0), scr);
+ cvmx_write_csr_node(0, CVMX_RST_SOFT_RST, 1);
+ }
+}
+
+static int octeon_wdt_cpu_to_irq(int cpu)
+{
+ unsigned int coreid;
+ int node;
+ int irq;
+
+ coreid = cpu2core(cpu);
+ node = cpu_to_node(cpu);
+
+ if (octeon_has_feature(OCTEON_FEATURE_CIU3)) {
+ struct irq_domain *domain;
+ int hwirq;
+
+ domain = octeon_irq_get_block_domain(node,
+ WD_BLOCK_NUMBER);
+ hwirq = WD_BLOCK_NUMBER << 12 | 0x200 | coreid;
+ irq = irq_find_mapping(domain, hwirq);
+ } else {
+ irq = OCTEON_IRQ_WDOG0 + coreid;
+ }
+ return irq;
}
static int octeon_wdt_cpu_pre_down(unsigned int cpu)
{
unsigned int core;
- unsigned int irq;
+ int node;
union cvmx_ciu_wdogx ciu_wdog;
core = cpu2core(cpu);
- irq = OCTEON_IRQ_WDOG0 + core;
+ node = cpu_to_node(cpu);
/* Poke the watchdog to clear out its state */
- cvmx_write_csr(CVMX_CIU_PP_POKEX(core), 1);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(core), 1);
/* Disable the hardware. */
ciu_wdog.u64 = 0;
- cvmx_write_csr(CVMX_CIU_WDOGX(core), ciu_wdog.u64);
+ cvmx_write_csr_node(node, CVMX_CIU_WDOGX(core), ciu_wdog.u64);
- free_irq(irq, octeon_wdt_poke_irq);
+ free_irq(octeon_wdt_cpu_to_irq(cpu), octeon_wdt_poke_irq);
return 0;
}
unsigned int core;
unsigned int irq;
union cvmx_ciu_wdogx ciu_wdog;
+ int node;
+ struct irq_domain *domain;
+ int hwirq;
core = cpu2core(cpu);
+ node = cpu_to_node(cpu);
octeon_wdt_bootvector[core].target_ptr = (u64)octeon_wdt_nmi_stage2;
/* Disable it before doing anything with the interrupts. */
ciu_wdog.u64 = 0;
- cvmx_write_csr(CVMX_CIU_WDOGX(core), ciu_wdog.u64);
+ cvmx_write_csr_node(node, CVMX_CIU_WDOGX(core), ciu_wdog.u64);
per_cpu_countdown[cpu] = countdown_reset;
- irq = OCTEON_IRQ_WDOG0 + core;
+ if (octeon_has_feature(OCTEON_FEATURE_CIU3)) {
+ /* Must get the domain for the watchdog block */
+ domain = octeon_irq_get_block_domain(node, WD_BLOCK_NUMBER);
+
+ /* Get a irq for the wd intsn (hardware interrupt) */
+ hwirq = WD_BLOCK_NUMBER << 12 | 0x200 | core;
+ irq = irq_create_mapping(domain, hwirq);
+ irqd_set_trigger_type(irq_get_irq_data(irq),
+ IRQ_TYPE_EDGE_RISING);
+ } else
+ irq = OCTEON_IRQ_WDOG0 + core;
if (request_irq(irq, octeon_wdt_poke_irq,
IRQF_NO_THREAD, "octeon_wdt", octeon_wdt_poke_irq))
panic("octeon_wdt: Couldn't obtain irq %d", irq);
+ /* Must set the irq affinity here */
+ if (octeon_has_feature(OCTEON_FEATURE_CIU3)) {
+ cpumask_t mask;
+
+ cpumask_clear(&mask);
+ cpumask_set_cpu(cpu, &mask);
+ irq_set_affinity(irq, &mask);
+ }
+
cpumask_set_cpu(cpu, &irq_enabled_cpus);
/* Poke the watchdog to clear out its state */
- cvmx_write_csr(CVMX_CIU_PP_POKEX(core), 1);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(core), 1);
/* Finally enable the watchdog now that all handlers are installed */
ciu_wdog.u64 = 0;
ciu_wdog.s.len = timeout_cnt;
ciu_wdog.s.mode = 3; /* 3 = Interrupt + NMI + Soft-Reset */
- cvmx_write_csr(CVMX_CIU_WDOGX(core), ciu_wdog.u64);
+ cvmx_write_csr_node(node, CVMX_CIU_WDOGX(core), ciu_wdog.u64);
return 0;
}
{
int cpu;
int coreid;
+ int node;
if (disable)
return 0;
for_each_online_cpu(cpu) {
coreid = cpu2core(cpu);
- cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
+ node = cpu_to_node(cpu);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(coreid), 1);
per_cpu_countdown[cpu] = countdown_reset;
if ((countdown_reset || !do_countdown) &&
!cpumask_test_cpu(cpu, &irq_enabled_cpus)) {
/* We have to enable the irq */
- int irq = OCTEON_IRQ_WDOG0 + coreid;
-
- enable_irq(irq);
+ enable_irq(octeon_wdt_cpu_to_irq(cpu));
cpumask_set_cpu(cpu, &irq_enabled_cpus);
}
}
countdown_reset = periods > 2 ? periods - 2 : 0;
heartbeat = t;
- timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * timeout_sec) >> 8;
+ timeout_cnt = ((octeon_get_io_clock_rate() / divisor) * timeout_sec) >> 8;
}
static int octeon_wdt_set_timeout(struct watchdog_device *wdog,
int cpu;
int coreid;
union cvmx_ciu_wdogx ciu_wdog;
+ int node;
if (t <= 0)
return -1;
for_each_online_cpu(cpu) {
coreid = cpu2core(cpu);
- cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
+ node = cpu_to_node(cpu);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(coreid), 1);
ciu_wdog.u64 = 0;
ciu_wdog.s.len = timeout_cnt;
ciu_wdog.s.mode = 3; /* 3 = Interrupt + NMI + Soft-Reset */
- cvmx_write_csr(CVMX_CIU_WDOGX(coreid), ciu_wdog.u64);
- cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
+ cvmx_write_csr_node(node, CVMX_CIU_WDOGX(coreid), ciu_wdog.u64);
+ cvmx_write_csr_node(node, CVMX_CIU_PP_POKEX(coreid), 1);
}
octeon_wdt_ping(wdog); /* Get the irqs back on. */
return 0;
*/
static int __init octeon_wdt_init(void)
{
- int i;
int ret;
- u64 *ptr;
octeon_wdt_bootvector = cvmx_boot_vector_get();
if (!octeon_wdt_bootvector) {
return -ENOMEM;
}
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ divisor = 0x200;
+ else if (OCTEON_IS_MODEL(OCTEON_CN78XX))
+ divisor = 0x400;
+ else
+ divisor = 0x100;
+
/*
* Watchdog time expiration length = The 16 bits of LEN
* represent the most significant bits of a 24 bit decrementer
- * that decrements every 256 cycles.
+ * that decrements every divisor cycle.
*
* Try for a timeout of 5 sec, if that fails a smaller number
* of even seconds,
max_timeout_sec = 6;
do {
max_timeout_sec--;
- timeout_cnt = ((octeon_get_io_clock_rate() >> 8) *
- max_timeout_sec) >> 8;
+ timeout_cnt = ((octeon_get_io_clock_rate() / divisor) * max_timeout_sec) >> 8;
} while (timeout_cnt > 65535);
BUG_ON(timeout_cnt == 0);
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