[PATCH 16/25] tools/power turbostat: Extend PMT identification with a sequence number

[Len Brown <lenb@kernel.org>]

From: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>

When platforms expose multiple PMT aggregators with the same GUID, the
only way to identify them and map to specific domain is by reading them
in an order they were exposed via PCIe. Intel PMT kernel driver does
keep the same order and numbers the telemetry directories accordingly.

Use GUID and sequence number (order) to uniquely identify PMT
aggregators.

Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
 tools/power/x86/turbostat/turbostat.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 60b1ade8659b..14c495886746 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1536,6 +1536,7 @@ static struct msr_counter_arch_info msr_counter_arch_infos[] = {
 #define PMT_COUNTER_MTL_DC6_LSB    0
 #define PMT_COUNTER_MTL_DC6_MSB    63
 #define PMT_MTL_DC6_GUID           0x1a067102
+#define PMT_MTL_DC6_SEQ            0
 
 #define PMT_COUNTER_NAME_SIZE_BYTES      16
 #define PMT_COUNTER_TYPE_NAME_SIZE_BYTES 32
@@ -9083,7 +9084,7 @@ void *pmt_get_counter_pointer(struct pmt_mmio *pmmio, unsigned long counter_offs
 	return ret;
 }
 
-struct pmt_mmio *pmt_add_guid(unsigned int guid)
+struct pmt_mmio *pmt_add_guid(unsigned int guid, unsigned int seq)
 {
 	struct pmt_mmio *ret;
 
@@ -9091,6 +9092,11 @@ struct pmt_mmio *pmt_add_guid(unsigned int guid)
 	if (!ret)
 		ret = pmt_mmio_open(guid);
 
+	while (ret && seq) {
+		ret = ret->next;
+		--seq;
+	}
+
 	return ret;
 }
 
@@ -9137,7 +9143,7 @@ void pmt_counter_add_domain(struct pmt_counter *pcounter, unsigned long *pmmio,
 	pcounter->domains[domain_id].pcounter = pmmio;
 }
 
-int pmt_add_counter(unsigned int guid, const char *name, enum pmt_datatype type,
+int pmt_add_counter(unsigned int guid, unsigned int seq, const char *name, enum pmt_datatype type,
 		    unsigned int lsb, unsigned int msb, unsigned int offset, enum counter_scope scope,
 		    enum counter_format format, unsigned int domain_id, enum pmt_open_mode mode)
 {
@@ -9157,10 +9163,10 @@ int pmt_add_counter(unsigned int guid, const char *name, enum pmt_datatype type,
 		exit(1);
 	}
 
-	mmio = pmt_add_guid(guid);
+	mmio = pmt_add_guid(guid, seq);
 	if (!mmio) {
 		if (mode != PMT_OPEN_TRY) {
-			fprintf(stderr, "%s: failed to map PMT MMIO for guid %x\n", __func__, guid);
+			fprintf(stderr, "%s: failed to map PMT MMIO for guid %x, seq %u\n", __func__, guid, seq);
 			exit(1);
 		}
 
@@ -9216,9 +9222,9 @@ int pmt_add_counter(unsigned int guid, const char *name, enum pmt_datatype type,
 void pmt_init(void)
 {
 	if (BIC_IS_ENABLED(BIC_Diec6)) {
-		pmt_add_counter(PMT_MTL_DC6_GUID, "Die%c6", PMT_TYPE_XTAL_TIME, PMT_COUNTER_MTL_DC6_LSB,
-				PMT_COUNTER_MTL_DC6_MSB, PMT_COUNTER_MTL_DC6_OFFSET, SCOPE_PACKAGE, FORMAT_DELTA,
-				0, PMT_OPEN_TRY);
+		pmt_add_counter(PMT_MTL_DC6_GUID, PMT_MTL_DC6_SEQ, "Die%c6", PMT_TYPE_XTAL_TIME,
+				PMT_COUNTER_MTL_DC6_LSB, PMT_COUNTER_MTL_DC6_MSB, PMT_COUNTER_MTL_DC6_OFFSET,
+				SCOPE_PACKAGE, FORMAT_DELTA, 0, PMT_OPEN_TRY);
 	}
 }
 
@@ -9699,6 +9705,7 @@ void parse_add_command_pmt(char *add_command)
 	unsigned int lsb;
 	unsigned int msb;
 	unsigned int guid;
+	unsigned int seq = 0; /* By default, pick first file in a sequence with a given GUID. */
 	unsigned int domain_id;
 	enum counter_scope scope = 0;
 	enum pmt_datatype type = PMT_TYPE_RAW;
@@ -9778,6 +9785,10 @@ void parse_add_command_pmt(char *add_command)
 			goto next;
 		}
 
+		if (sscanf(add_command, "seq=%x", &seq) == 1) {
+			goto next;
+		}
+
 next:
 		add_command = strchr(add_command, ',');
 		if (add_command) {
@@ -9864,7 +9875,7 @@ void parse_add_command_pmt(char *add_command)
 		exit(1);
 	}
 
-	pmt_add_counter(guid, name, type, lsb, msb, offset, scope, format, domain_id, PMT_OPEN_REQUIRED);
+	pmt_add_counter(guid, seq, name, type, lsb, msb, offset, scope, format, domain_id, PMT_OPEN_REQUIRED);
 }
 
 void parse_add_command(char *add_command)
-- 
2.43.0