lib: sbi_pmu: Add hartid parameter PMU device ops

Platform specific firmware event handler may leverage the hartid to program
per hart specific registers for a given counter.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

include/sbi/sbi_pmu.h

@@ -31,13 +31,14 @@ struct sbi_pmu_device {
 	/**
 	 * Validate event code of custom firmware event
 	 */
-	int (*fw_event_validate_encoding)(uint64_t event_data);
+	int (*fw_event_validate_encoding)(uint32_t hartid, uint64_t event_data);
 
 	/**
 	 * Match custom firmware counter with custom firmware event
 	 * Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
 	 */
-	bool (*fw_counter_match_encoding)(uint32_t counter_index,
+	bool (*fw_counter_match_encoding)(uint32_t hartid,
+					  uint32_t counter_index,
 					  uint64_t event_data);
 
 	/**
@@ -49,27 +50,28 @@ struct sbi_pmu_device {
 	 * Read value of custom firmware counter
 	 * Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
 	 */
-	uint64_t (*fw_counter_read_value)(uint32_t counter_index);
+	uint64_t (*fw_counter_read_value)(uint32_t hartid,
+					  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,
+	void (*fw_counter_write_value)(uint32_t hartid, uint32_t counter_index,
 				       uint64_t value);
 
 	/**
 	 * Start custom firmware counter
 	 * Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
 	 */
-	int (*fw_counter_start)(uint32_t counter_index,
+	int (*fw_counter_start)(uint32_t hartid, uint32_t counter_index,
 				uint64_t event_data);
 
 	/**
 	 * Stop custom firmware counter
 	 * Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
 	 */
-	int (*fw_counter_stop)(uint32_t counter_index);
+	int (*fw_counter_stop)(uint32_t hartid, uint32_t counter_index);
 
 	/**
 	 * Custom enable irq for hardware counter

lib/sbi/sbi_pmu.c

@@ -116,6 +116,7 @@ static int pmu_event_validate(unsigned long event_idx, uint64_t edata)
 	uint32_t event_idx_code = get_cidx_code(event_idx);
 	uint32_t event_idx_code_max = -1;
 	uint32_t cache_ops_result, cache_ops_id, cache_id;
+	u32 hartid = current_hartid();
 
 	switch(event_idx_type) {
 	case SBI_PMU_EVENT_TYPE_HW:
@@ -129,7 +130,8 @@ static int pmu_event_validate(unsigned long event_idx, uint64_t edata)
 
 		if (SBI_PMU_FW_PLATFORM == event_idx_code &&
 		    pmu_dev && pmu_dev->fw_event_validate_encoding)
-			return pmu_dev->fw_event_validate_encoding(edata);
+			return pmu_dev->fw_event_validate_encoding(hartid,
+							           edata);
 		else
 			event_idx_code_max = SBI_PMU_FW_MAX;
 		break;
@@ -199,7 +201,8 @@ int sbi_pmu_ctr_fw_read(uint32_t cidx, uint64_t *cval)
 
 	if (SBI_PMU_FW_PLATFORM == event_code) {
 		if (pmu_dev && pmu_dev->fw_counter_read_value)
-			*cval = pmu_dev->fw_counter_read_value(cidx -
+			*cval = pmu_dev->fw_counter_read_value(hartid,
+							       cidx -
 							       num_hw_ctrs);
 		else
 			*cval = 0;
@@ -391,10 +394,11 @@ static int pmu_ctr_start_fw(uint32_t cidx, uint32_t event_code,
 		    }
 
 		if (ival_update)
-			pmu_dev->fw_counter_write_value(cidx - num_hw_ctrs,
+			pmu_dev->fw_counter_write_value(hartid,
+							cidx - num_hw_ctrs,
 							ival);
 
-		return pmu_dev->fw_counter_start(cidx - num_hw_ctrs,
+		return pmu_dev->fw_counter_start(hartid, cidx - num_hw_ctrs,
 						 event_data);
 	} else {
 		if (ival_update)
@@ -467,6 +471,7 @@ static int pmu_ctr_stop_hw(uint32_t cidx)
 
 static int pmu_ctr_stop_fw(uint32_t cidx, uint32_t event_code)
 {
+	u32 hartid = current_hartid();
 	int ret;
 
 	if ((event_code >= SBI_PMU_FW_MAX &&
@@ -476,7 +481,7 @@ static int pmu_ctr_stop_fw(uint32_t cidx, uint32_t event_code)
 
 	if (SBI_PMU_FW_PLATFORM == event_code &&
 	    pmu_dev && pmu_dev->fw_counter_stop) {
-		ret = pmu_dev->fw_counter_stop(cidx - num_hw_ctrs);
+		ret = pmu_dev->fw_counter_stop(hartid, cidx - num_hw_ctrs);
 		if (ret)
 			return ret;
 	}
@@ -697,8 +702,9 @@ static int pmu_ctr_find_fw(unsigned long cbase, unsigned long cmask,
 			continue;
 		if (SBI_PMU_FW_PLATFORM == event_code &&
 		    pmu_dev && pmu_dev->fw_counter_match_encoding) {
-			if (!pmu_dev->fw_counter_match_encoding(cidx - num_hw_ctrs,
+			if (!pmu_dev->fw_counter_match_encoding(hartid,
-								edata))
+							    cidx - num_hw_ctrs,
+							    edata))
 				continue;
 		}
 
@@ -764,9 +770,8 @@ 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 -
+				ret = pmu_dev->fw_counter_start(hartid,
-								num_hw_ctrs,
+					ctr_idx - num_hw_ctrs, event_data);
-								event_data);
 				if (ret)
 					return ret;
 			}