From: Carlos Munoz <carlos.munoz@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Carlos Munoz <carlos.munoz@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Steven J. Hill <steven.hill@xxxxxxxxxx>
Acked-by: David Daney <david.daney@xxxxxxxxxx>
---
drivers/watchdog/octeon-wdt-main.c | 133 ++++++++++++++++++++++++++++---------
1 file changed, 103 insertions(+), 30 deletions(-)
diff --git a/drivers/watchdog/octeon-wdt-main.c b/drivers/watchdog/octeon-wdt-main.c
index 410800f..0ec419a 100644
--- a/drivers/watchdog/octeon-wdt-main.c
+++ b/drivers/watchdog/octeon-wdt-main.c
@@ -70,6 +70,10 @@
#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;
@@ -91,6 +95,8 @@ static cpumask_t irq_enabled_cpus;
#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,
@@ -115,21 +121,12 @@ void octeon_wdt_nmi_stage2(void);
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
*
@@ -140,13 +137,14 @@ static int core2cpu(int coreid)
*/
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. */
@@ -155,7 +153,7 @@ static irqreturn_t octeon_wdt_poke_irq(int cpl, void *dev_id)
}
} 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;
}
@@ -280,26 +278,74 @@ void octeon_wdt_nmi_stage3(u64 reg[32])
}
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;
}
@@ -308,33 +354,56 @@ static int octeon_wdt_cpu_online(unsigned int cpu)
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;
}
@@ -343,20 +412,20 @@ static int octeon_wdt_ping(struct watchdog_device __always_unused *wdog)
{
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);
}
}
@@ -395,6 +464,7 @@ 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;
@@ -406,12 +476,13 @@ static int octeon_wdt_set_timeout(struct watchdog_device *wdog,
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;
@@ -467,6 +538,8 @@ static int __init octeon_wdt_init(void)
if (OCTEON_IS_MODEL(OCTEON_CN68XX))
divisor = 0x200;
+ else if (OCTEON_IS_MODEL(OCTEON_CN78XX))
+ divisor = 0x400;
else
divisor = 0x100;
--
2.1.4
