diff mbox series

[v8,06/13] platform/x86: hfi: init per-cpu scores for each class

Message ID 20250218190822.1039982-7-superm1@kernel.org
State New
Headers show
Series Add support for AMD hardware feedback interface | expand

Commit Message

Mario Limonciello Feb. 18, 2025, 7:08 p.m. UTC 
From: Perry Yuan <Perry.Yuan@amd.com>

Initialize per cpu score `amd_hfi_ipcc_scores` which store energy score
and performance score data for each class.

`Classic core` and `Dense core` are ranked according to those values as
energy efficiency capability or performance capability.
OS scheduler will pick cores from the ranking list on each class ID for
the thread which provide the class id got from hardware feedback
interface.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Co-developed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
v8:
 * s,for_each_present_cpu,for_each_possible_cpu,
v7:
 * Drop mutex, move to proper patch
---
 drivers/platform/x86/amd/hfi/hfi.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
diff mbox series

Patch

diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index 7ab7ae0ec72ca..e1550f4463275 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -225,6 +225,31 @@  static int amd_hfi_alloc_class_data(struct platform_device *pdev)
 	return 0;
 }
 
+static int amd_set_hfi_ipcc_score(struct amd_hfi_cpuinfo *hfi_cpuinfo, int cpu)
+{
+	for (int i = 0; i < hfi_cpuinfo->nr_class; i++)
+		WRITE_ONCE(hfi_cpuinfo->ipcc_scores[i],
+			   hfi_cpuinfo->amd_hfi_classes[i].perf);
+
+	return 0;
+}
+
+static int update_hfi_ipcc_scores(void)
+{
+	int cpu;
+	int ret;
+
+	for_each_possible_cpu(cpu) {
+		struct amd_hfi_cpuinfo *hfi_cpuinfo = per_cpu_ptr(&amd_hfi_cpuinfo, cpu);
+
+		ret = amd_set_hfi_ipcc_score(hfi_cpuinfo, cpu);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 static int amd_hfi_metadata_parser(struct platform_device *pdev,
 				   struct amd_hfi_data *amd_hfi_data)
 {
@@ -310,6 +335,10 @@  static int amd_hfi_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+	ret = update_hfi_ipcc_scores();
+	if (ret)
+		return ret;
+
 	return 0;
 }