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path: root/drivers/acpi/apei/erst.c
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Diffstat (limited to 'drivers/acpi/apei/erst.c')
-rw-r--r--drivers/acpi/apei/erst.c41
1 files changed, 37 insertions, 4 deletions
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 247989060e..bf65e34615 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -59,6 +59,10 @@ static struct acpi_table_erst *erst_tab;
#define ERST_RANGE_NVRAM 0x0002
#define ERST_RANGE_SLOW 0x0004
+/* ERST Exec max timings */
+#define ERST_EXEC_TIMING_MAX_MASK 0xFFFFFFFF00000000
+#define ERST_EXEC_TIMING_MAX_SHIFT 32
+
/*
* ERST Error Log Address Range, used as buffer for reading/writing
* error records.
@@ -68,6 +72,7 @@ static struct erst_erange {
u64 size;
void __iomem *vaddr;
u32 attr;
+ u64 timings;
} erst_erange;
/*
@@ -97,6 +102,19 @@ static inline int erst_errno(int command_status)
}
}
+static inline u64 erst_get_timeout(void)
+{
+ u64 timeout = FIRMWARE_TIMEOUT;
+
+ if (erst_erange.attr & ERST_RANGE_SLOW) {
+ timeout = ((erst_erange.timings & ERST_EXEC_TIMING_MAX_MASK) >>
+ ERST_EXEC_TIMING_MAX_SHIFT) * NSEC_PER_MSEC;
+ if (timeout < FIRMWARE_TIMEOUT)
+ timeout = FIRMWARE_TIMEOUT;
+ }
+ return timeout;
+}
+
static int erst_timedout(u64 *t, u64 spin_unit)
{
if ((s64)*t < spin_unit) {
@@ -191,9 +209,11 @@ static int erst_exec_stall_while_true(struct apei_exec_context *ctx,
{
int rc;
u64 val;
- u64 timeout = FIRMWARE_TIMEOUT;
+ u64 timeout;
u64 stall_time;
+ timeout = erst_get_timeout();
+
if (ctx->var1 > FIRMWARE_MAX_STALL) {
if (!in_nmi())
pr_warn(FW_WARN
@@ -389,6 +409,13 @@ static int erst_get_erange(struct erst_erange *range)
if (rc)
return rc;
range->attr = apei_exec_ctx_get_output(&ctx);
+ rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_TIMINGS);
+ if (rc == 0)
+ range->timings = apei_exec_ctx_get_output(&ctx);
+ else if (rc == -ENOENT)
+ range->timings = 0;
+ else
+ return rc;
return 0;
}
@@ -621,10 +648,12 @@ EXPORT_SYMBOL_GPL(erst_get_record_id_end);
static int __erst_write_to_storage(u64 offset)
{
struct apei_exec_context ctx;
- u64 timeout = FIRMWARE_TIMEOUT;
+ u64 timeout;
u64 val;
int rc;
+ timeout = erst_get_timeout();
+
erst_exec_ctx_init(&ctx);
rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_WRITE);
if (rc)
@@ -660,10 +689,12 @@ static int __erst_write_to_storage(u64 offset)
static int __erst_read_from_storage(u64 record_id, u64 offset)
{
struct apei_exec_context ctx;
- u64 timeout = FIRMWARE_TIMEOUT;
+ u64 timeout;
u64 val;
int rc;
+ timeout = erst_get_timeout();
+
erst_exec_ctx_init(&ctx);
rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_READ);
if (rc)
@@ -703,10 +734,12 @@ static int __erst_read_from_storage(u64 record_id, u64 offset)
static int __erst_clear_from_storage(u64 record_id)
{
struct apei_exec_context ctx;
- u64 timeout = FIRMWARE_TIMEOUT;
+ u64 timeout;
u64 val;
int rc;
+ timeout = erst_get_timeout();
+
erst_exec_ctx_init(&ctx);
rc = apei_exec_run_optional(&ctx, ACPI_ERST_BEGIN_CLEAR);
if (rc)