Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 324 insertions, 0 deletions

diff --git a/drivers/powercap/intel_rapl_tpmi.c b/drivers/powercap/intel_rapl_tpmi.c
new file mode 100644
index 0000000000..891c90fefd
--- /dev/null
+++ b/drivers/powercap/intel_rapl_tpmi.c
@@ -0,0 +1,324 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_rapl_tpmi: Intel RAPL driver via TPMI interface
+ *
+ * Copyright (c) 2023, Intel Corporation.
+ * All Rights Reserved.
+ *
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/auxiliary_bus.h>
+#include <linux/io.h>
+#include <linux/intel_tpmi.h>
+#include <linux/intel_rapl.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#define TPMI_RAPL_VERSION 1
+
+/* 1 header + 10 registers + 5 reserved. 8 bytes for each. */
+#define TPMI_RAPL_DOMAIN_SIZE 128
+
+enum tpmi_rapl_domain_type {
+	TPMI_RAPL_DOMAIN_INVALID,
+	TPMI_RAPL_DOMAIN_SYSTEM,
+	TPMI_RAPL_DOMAIN_PACKAGE,
+	TPMI_RAPL_DOMAIN_RESERVED,
+	TPMI_RAPL_DOMAIN_MEMORY,
+	TPMI_RAPL_DOMAIN_MAX,
+};
+
+enum tpmi_rapl_register {
+	TPMI_RAPL_REG_HEADER,
+	TPMI_RAPL_REG_UNIT,
+	TPMI_RAPL_REG_PL1,
+	TPMI_RAPL_REG_PL2,
+	TPMI_RAPL_REG_PL3,
+	TPMI_RAPL_REG_PL4,
+	TPMI_RAPL_REG_RESERVED,
+	TPMI_RAPL_REG_ENERGY_STATUS,
+	TPMI_RAPL_REG_PERF_STATUS,
+	TPMI_RAPL_REG_POWER_INFO,
+	TPMI_RAPL_REG_INTERRUPT,
+	TPMI_RAPL_REG_MAX = 15,
+};
+
+struct tpmi_rapl_package {
+	struct rapl_if_priv priv;
+	struct intel_tpmi_plat_info *tpmi_info;
+	struct rapl_package *rp;
+	void __iomem *base;
+	struct list_head node;
+};
+
+static LIST_HEAD(tpmi_rapl_packages);
+static DEFINE_MUTEX(tpmi_rapl_lock);
+
+static struct powercap_control_type *tpmi_control_type;
+
+static int tpmi_rapl_read_raw(int id, struct reg_action *ra)
+{
+	if (!ra->reg.mmio)
+		return -EINVAL;
+
+	ra->value = readq(ra->reg.mmio);
+
+	ra->value &= ra->mask;
+	return 0;
+}
+
+static int tpmi_rapl_write_raw(int id, struct reg_action *ra)
+{
+	u64 val;
+
+	if (!ra->reg.mmio)
+		return -EINVAL;
+
+	val = readq(ra->reg.mmio);
+
+	val &= ~ra->mask;
+	val |= ra->value;
+
+	writeq(val, ra->reg.mmio);
+	return 0;
+}
+
+static struct tpmi_rapl_package *trp_alloc(int pkg_id)
+{
+	struct tpmi_rapl_package *trp;
+	int ret;
+
+	mutex_lock(&tpmi_rapl_lock);
+
+	if (list_empty(&tpmi_rapl_packages)) {
+		tpmi_control_type = powercap_register_control_type(NULL, "intel-rapl", NULL);
+		if (IS_ERR(tpmi_control_type)) {
+			ret = PTR_ERR(tpmi_control_type);
+			goto err_unlock;
+		}
+	}
+
+	trp = kzalloc(sizeof(*trp), GFP_KERNEL);
+	if (!trp) {
+		ret = -ENOMEM;
+		goto err_del_powercap;
+	}
+
+	list_add(&trp->node, &tpmi_rapl_packages);
+
+	mutex_unlock(&tpmi_rapl_lock);
+	return trp;
+
+err_del_powercap:
+	if (list_empty(&tpmi_rapl_packages))
+		powercap_unregister_control_type(tpmi_control_type);
+err_unlock:
+	mutex_unlock(&tpmi_rapl_lock);
+	return ERR_PTR(ret);
+}
+
+static void trp_release(struct tpmi_rapl_package *trp)
+{
+	mutex_lock(&tpmi_rapl_lock);
+	list_del(&trp->node);
+
+	if (list_empty(&tpmi_rapl_packages))
+		powercap_unregister_control_type(tpmi_control_type);
+
+	kfree(trp);
+	mutex_unlock(&tpmi_rapl_lock);
+}
+
+static int parse_one_domain(struct tpmi_rapl_package *trp, u32 offset)
+{
+	u8 tpmi_domain_version;
+	enum rapl_domain_type domain_type;
+	enum tpmi_rapl_domain_type tpmi_domain_type;
+	enum tpmi_rapl_register reg_index;
+	enum rapl_domain_reg_id reg_id;
+	int tpmi_domain_size, tpmi_domain_flags;
+	u64 tpmi_domain_header = readq(trp->base + offset);
+
+	/* Domain Parent bits are ignored for now */
+	tpmi_domain_version = tpmi_domain_header & 0xff;
+	tpmi_domain_type = tpmi_domain_header >> 8 & 0xff;
+	tpmi_domain_size = tpmi_domain_header >> 16 & 0xff;
+	tpmi_domain_flags = tpmi_domain_header >> 32 & 0xffff;
+
+	if (tpmi_domain_version != TPMI_RAPL_VERSION) {
+		pr_warn(FW_BUG "Unsupported version:%d\n", tpmi_domain_version);
+		return -ENODEV;
+	}
+
+	/* Domain size: in unit of 128 Bytes */
+	if (tpmi_domain_size != 1) {
+		pr_warn(FW_BUG "Invalid Domain size %d\n", tpmi_domain_size);
+		return -EINVAL;
+	}
+
+	/* Unit register and Energy Status register are mandatory for each domain */
+	if (!(tpmi_domain_flags & BIT(TPMI_RAPL_REG_UNIT)) ||
+	    !(tpmi_domain_flags & BIT(TPMI_RAPL_REG_ENERGY_STATUS))) {
+		pr_warn(FW_BUG "Invalid Domain flag 0x%x\n", tpmi_domain_flags);
+		return -EINVAL;
+	}
+
+	switch (tpmi_domain_type) {
+	case TPMI_RAPL_DOMAIN_PACKAGE:
+		domain_type = RAPL_DOMAIN_PACKAGE;
+		break;
+	case TPMI_RAPL_DOMAIN_SYSTEM:
+		domain_type = RAPL_DOMAIN_PLATFORM;
+		break;
+	case TPMI_RAPL_DOMAIN_MEMORY:
+		domain_type = RAPL_DOMAIN_DRAM;
+		break;
+	default:
+		pr_warn(FW_BUG "Unsupported Domain type %d\n", tpmi_domain_type);
+		return -EINVAL;
+	}
+
+	if (trp->priv.regs[domain_type][RAPL_DOMAIN_REG_UNIT].mmio) {
+		pr_warn(FW_BUG "Duplicate Domain type %d\n", tpmi_domain_type);
+		return -EINVAL;
+	}
+
+	reg_index = TPMI_RAPL_REG_HEADER;
+	while (++reg_index != TPMI_RAPL_REG_MAX) {
+		if (!(tpmi_domain_flags & BIT(reg_index)))
+			continue;
+
+		switch (reg_index) {
+		case TPMI_RAPL_REG_UNIT:
+			reg_id = RAPL_DOMAIN_REG_UNIT;
+			break;
+		case TPMI_RAPL_REG_PL1:
+			reg_id = RAPL_DOMAIN_REG_LIMIT;
+			trp->priv.limits[domain_type] |= BIT(POWER_LIMIT1);
+			break;
+		case TPMI_RAPL_REG_PL2:
+			reg_id = RAPL_DOMAIN_REG_PL2;
+			trp->priv.limits[domain_type] |= BIT(POWER_LIMIT2);
+			break;
+		case TPMI_RAPL_REG_PL4:
+			reg_id = RAPL_DOMAIN_REG_PL4;
+			trp->priv.limits[domain_type] |= BIT(POWER_LIMIT4);
+			break;
+		case TPMI_RAPL_REG_ENERGY_STATUS:
+			reg_id = RAPL_DOMAIN_REG_STATUS;
+			break;
+		case TPMI_RAPL_REG_PERF_STATUS:
+			reg_id = RAPL_DOMAIN_REG_PERF;
+			break;
+		case TPMI_RAPL_REG_POWER_INFO:
+			reg_id = RAPL_DOMAIN_REG_INFO;
+			break;
+		default:
+			continue;
+		}
+		trp->priv.regs[domain_type][reg_id].mmio = trp->base + offset + reg_index * 8;
+	}
+
+	return 0;
+}
+
+static int intel_rapl_tpmi_probe(struct auxiliary_device *auxdev,
+				 const struct auxiliary_device_id *id)
+{
+	struct tpmi_rapl_package *trp;
+	struct intel_tpmi_plat_info *info;
+	struct resource *res;
+	u32 offset;
+	int ret;
+
+	info = tpmi_get_platform_data(auxdev);
+	if (!info)
+		return -ENODEV;
+
+	trp = trp_alloc(info->package_id);
+	if (IS_ERR(trp))
+		return PTR_ERR(trp);
+
+	if (tpmi_get_resource_count(auxdev) > 1) {
+		dev_err(&auxdev->dev, "does not support multiple resources\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	res = tpmi_get_resource_at_index(auxdev, 0);
+	if (!res) {
+		dev_err(&auxdev->dev, "can't fetch device resource info\n");
+		ret = -EIO;
+		goto err;
+	}
+
+	trp->base = devm_ioremap_resource(&auxdev->dev, res);
+	if (IS_ERR(trp->base)) {
+		ret = PTR_ERR(trp->base);
+		goto err;
+	}
+
+	for (offset = 0; offset < resource_size(res); offset += TPMI_RAPL_DOMAIN_SIZE) {
+		ret = parse_one_domain(trp, offset);
+		if (ret)
+			goto err;
+	}
+
+	trp->tpmi_info = info;
+	trp->priv.type = RAPL_IF_TPMI;
+	trp->priv.read_raw = tpmi_rapl_read_raw;
+	trp->priv.write_raw = tpmi_rapl_write_raw;
+	trp->priv.control_type = tpmi_control_type;
+
+	/* RAPL TPMI I/F is per physical package */
+	trp->rp = rapl_find_package_domain(info->package_id, &trp->priv, false);
+	if (trp->rp) {
+		dev_err(&auxdev->dev, "Domain for Package%d already exists\n", info->package_id);
+		ret = -EEXIST;
+		goto err;
+	}
+
+	trp->rp = rapl_add_package(info->package_id, &trp->priv, false);
+	if (IS_ERR(trp->rp)) {
+		dev_err(&auxdev->dev, "Failed to add RAPL Domain for Package%d, %ld\n",
+			info->package_id, PTR_ERR(trp->rp));
+		ret = PTR_ERR(trp->rp);
+		goto err;
+	}
+
+	auxiliary_set_drvdata(auxdev, trp);
+
+	return 0;
+err:
+	trp_release(trp);
+	return ret;
+}
+
+static void intel_rapl_tpmi_remove(struct auxiliary_device *auxdev)
+{
+	struct tpmi_rapl_package *trp = auxiliary_get_drvdata(auxdev);
+
+	rapl_remove_package(trp->rp);
+	trp_release(trp);
+}
+
+static const struct auxiliary_device_id intel_rapl_tpmi_ids[] = {
+	{.name = "intel_vsec.tpmi-rapl" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(auxiliary, intel_rapl_tpmi_ids);
+
+static struct auxiliary_driver intel_rapl_tpmi_driver = {
+	.probe = intel_rapl_tpmi_probe,
+	.remove = intel_rapl_tpmi_remove,
+	.id_table = intel_rapl_tpmi_ids,
+};
+
+module_auxiliary_driver(intel_rapl_tpmi_driver)
+
+MODULE_IMPORT_NS(INTEL_TPMI);
+
+MODULE_DESCRIPTION("Intel RAPL TPMI Driver");
+MODULE_LICENSE("GPL");