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lib: sbi_pmu: Introduce fw_counter_write_value API

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Add fw_counter_write_value API for platform specific firmware events
which separates setting the counter's initial value from starting the
counter. This is required so that the fw_event_data array can be reused
to save the event data received.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Mayuresh Chitale 2023-03-09 18:43:57 +05:30 • committed by Anup Patel
parent 641d2e9f38
commit 57d3aa3b0d
2 changed files with 21 additions and 15 deletions
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11
include/sbi/sbi_pmu.h
View file

@ -51,14 +51,19 @@ struct sbi_pmu_device {
*/
uint64_t (*fw_counter_read_value)(uint32_t counter_index);
/**
* Write value to custom firmware counter
* Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
*/
void (*fw_counter_write_value)(uint32_t counter_index,
uint64_t value);
/**
* Start custom firmware counter
* Note: SBI_PMU_FW_MAX <= event_idx_code
* Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
*/
int (*fw_counter_start)(uint32_t counter_index,
uint64_t event_data,
uint64_t init_val, bool init_val_update);
uint64_t event_data);
/**
* Stop custom firmware counter

25
lib/sbi/sbi_pmu.c
View file

@ -376,7 +376,6 @@ static int pmu_ctr_start_fw(uint32_t cidx, uint32_t event_code,
uint64_t event_data, uint64_t ival,
bool ival_update)
{
int ret;
u32 hartid = current_hartid();
if ((event_code >= SBI_PMU_FW_MAX &&
@ -386,19 +385,22 @@ static int pmu_ctr_start_fw(uint32_t cidx, uint32_t event_code,
if (SBI_PMU_FW_PLATFORM == event_code) {
if (!pmu_dev ||
!pmu_dev->fw_counter_write_value ||
!pmu_dev->fw_counter_start) {
return SBI_EINVAL;
}
ret = pmu_dev->fw_counter_start(cidx - num_hw_ctrs,
event_data,
ival, ival_update);
if (ret)
return ret;
if (ival_update)
pmu_dev->fw_counter_write_value(cidx - num_hw_ctrs,
ival);
return pmu_dev->fw_counter_start(cidx - num_hw_ctrs,
event_data);
} else {
if (ival_update)
fw_counters_data[hartid][cidx - num_hw_ctrs] = ival;
}
if (ival_update)
fw_counters_data[hartid][cidx - num_hw_ctrs] = ival;
fw_counters_started[hartid] |= BIT(cidx - num_hw_ctrs);
return 0;
@ -762,10 +764,9 @@ skip_match:
if (flags & SBI_PMU_CFG_FLAG_AUTO_START) {
if (SBI_PMU_FW_PLATFORM == event_code &&
pmu_dev && pmu_dev->fw_counter_start) {
ret = pmu_dev->fw_counter_start(
ctr_idx - num_hw_ctrs, event_data,
fw_counters_data[hartid][ctr_idx - num_hw_ctrs],
true);
ret = pmu_dev->fw_counter_start(ctr_idx -
num_hw_ctrs,
event_data);
if (ret)
return ret;
}