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-rw-r--r--drivers/powercap/arm_scmi_powercap.c159
-rw-r--r--drivers/powercap/intel_rapl_common.c18
-rw-r--r--drivers/powercap/intel_rapl_msr.c51
-rw-r--r--drivers/powercap/intel_rapl_tpmi.c17
4 files changed, 135 insertions, 110 deletions
diff --git a/drivers/powercap/arm_scmi_powercap.c b/drivers/powercap/arm_scmi_powercap.c
index 5231f6d52ae3..a081f177e702 100644
--- a/drivers/powercap/arm_scmi_powercap.c
+++ b/drivers/powercap/arm_scmi_powercap.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/powercap.h>
#include <linux/scmi_protocol.h>
+#include <linux/slab.h>
#define to_scmi_powercap_zone(z) \
container_of(z, struct scmi_powercap_zone, zone)
@@ -19,6 +20,8 @@
static const struct scmi_powercap_proto_ops *powercap_ops;
struct scmi_powercap_zone {
+ bool registered;
+ bool invalid;
unsigned int height;
struct device *dev;
struct scmi_protocol_handle *ph;
@@ -32,6 +35,7 @@ struct scmi_powercap_root {
unsigned int num_zones;
struct scmi_powercap_zone *spzones;
struct list_head *registered_zones;
+ struct list_head scmi_zones;
};
static struct powercap_control_type *scmi_top_pcntrl;
@@ -271,12 +275,6 @@ static void scmi_powercap_unregister_all_zones(struct scmi_powercap_root *pr)
}
}
-static inline bool
-scmi_powercap_is_zone_registered(struct scmi_powercap_zone *spz)
-{
- return !list_empty(&spz->node);
-}
-
static inline unsigned int
scmi_powercap_get_zone_height(struct scmi_powercap_zone *spz)
{
@@ -295,11 +293,46 @@ scmi_powercap_get_parent_zone(struct scmi_powercap_zone *spz)
return &spz->spzones[spz->info->parent_id];
}
+static int scmi_powercap_register_zone(struct scmi_powercap_root *pr,
+ struct scmi_powercap_zone *spz,
+ struct scmi_powercap_zone *parent)
+{
+ int ret = 0;
+ struct powercap_zone *z;
+
+ if (spz->invalid) {
+ list_del(&spz->node);
+ return -EINVAL;
+ }
+
+ z = powercap_register_zone(&spz->zone, scmi_top_pcntrl, spz->info->name,
+ parent ? &parent->zone : NULL,
+ &zone_ops, 1, &constraint_ops);
+ if (!IS_ERR(z)) {
+ spz->height = scmi_powercap_get_zone_height(spz);
+ spz->registered = true;
+ list_move(&spz->node, &pr->registered_zones[spz->height]);
+ dev_dbg(spz->dev, "Registered node %s - parent %s - height:%d\n",
+ spz->info->name, parent ? parent->info->name : "ROOT",
+ spz->height);
+ } else {
+ list_del(&spz->node);
+ ret = PTR_ERR(z);
+ dev_err(spz->dev,
+ "Error registering node:%s - parent:%s - h:%d - ret:%d\n",
+ spz->info->name,
+ parent ? parent->info->name : "ROOT",
+ spz->height, ret);
+ }
+
+ return ret;
+}
+
/**
- * scmi_powercap_register_zone - Register an SCMI powercap zone recursively
+ * scmi_zones_register- Register SCMI powercap zones starting from parent zones
*
+ * @dev: A reference to the SCMI device
* @pr: A reference to the root powercap zones descriptors
- * @spz: A reference to the SCMI powercap zone to register
*
* When registering SCMI powercap zones with the powercap framework we should
* take care to always register zones starting from the root ones and to
@@ -309,10 +342,10 @@ scmi_powercap_get_parent_zone(struct scmi_powercap_zone *spz)
* zones provided by the SCMI platform firmware is built to comply with such
* requirement.
*
- * This function, given an SCMI powercap zone to register, takes care to walk
- * the SCMI powercap zones tree up to the root looking recursively for
- * unregistered parent zones before registering the provided zone; at the same
- * time each registered zone height in such a tree is accounted for and each
+ * This function, given the set of SCMI powercap zones to register, takes care
+ * to walk the SCMI powercap zones trees up to the root registering any
+ * unregistered parent zone before registering the child zones; at the same
+ * time each registered-zone height in such a tree is accounted for and each
* zone, once registered, is stored in the @registered_zones array that is
* indexed by zone height: this way will be trivial, at unregister time, to walk
* the @registered_zones array backward and unregister all the zones starting
@@ -330,57 +363,55 @@ scmi_powercap_get_parent_zone(struct scmi_powercap_zone *spz)
*
* Return: 0 on Success
*/
-static int scmi_powercap_register_zone(struct scmi_powercap_root *pr,
- struct scmi_powercap_zone *spz)
+static int scmi_zones_register(struct device *dev,
+ struct scmi_powercap_root *pr)
{
int ret = 0;
- struct scmi_powercap_zone *parent;
-
- if (!spz->info)
- return ret;
+ unsigned int sp = 0, reg_zones = 0;
+ struct scmi_powercap_zone *spz, **zones_stack;
- parent = scmi_powercap_get_parent_zone(spz);
- if (parent && !scmi_powercap_is_zone_registered(parent)) {
- /*
- * Bail out if a parent domain was marked as unsupported:
- * only domains participating as leaves can be skipped.
- */
- if (!parent->info)
- return -ENODEV;
+ zones_stack = kcalloc(pr->num_zones, sizeof(spz), GFP_KERNEL);
+ if (!zones_stack)
+ return -ENOMEM;
- ret = scmi_powercap_register_zone(pr, parent);
- if (ret)
- return ret;
- }
+ spz = list_first_entry_or_null(&pr->scmi_zones,
+ struct scmi_powercap_zone, node);
+ while (spz) {
+ struct scmi_powercap_zone *parent;
- if (!scmi_powercap_is_zone_registered(spz)) {
- struct powercap_zone *z;
-
- z = powercap_register_zone(&spz->zone,
- scmi_top_pcntrl,
- spz->info->name,
- parent ? &parent->zone : NULL,
- &zone_ops, 1, &constraint_ops);
- if (!IS_ERR(z)) {
- spz->height = scmi_powercap_get_zone_height(spz);
- list_add(&spz->node,
- &pr->registered_zones[spz->height]);
- dev_dbg(spz->dev,
- "Registered node %s - parent %s - height:%d\n",
- spz->info->name,
- parent ? parent->info->name : "ROOT",
- spz->height);
- ret = 0;
+ parent = scmi_powercap_get_parent_zone(spz);
+ if (parent && !parent->registered) {
+ zones_stack[sp++] = spz;
+ spz = parent;
} else {
- ret = PTR_ERR(z);
- dev_err(spz->dev,
- "Error registering node:%s - parent:%s - h:%d - ret:%d\n",
- spz->info->name,
- parent ? parent->info->name : "ROOT",
- spz->height, ret);
+ ret = scmi_powercap_register_zone(pr, spz, parent);
+ if (!ret) {
+ reg_zones++;
+ } else if (sp) {
+ /* Failed to register a non-leaf zone.
+ * Bail-out.
+ */
+ dev_err(dev,
+ "Failed to register non-leaf zone - ret:%d\n",
+ ret);
+ scmi_powercap_unregister_all_zones(pr);
+ reg_zones = 0;
+ goto out;
+ }
+ /* Pick next zone to process */
+ if (sp)
+ spz = zones_stack[--sp];
+ else
+ spz = list_first_entry_or_null(&pr->scmi_zones,
+ struct scmi_powercap_zone,
+ node);
}
}
+out:
+ kfree(zones_stack);
+ dev_info(dev, "Registered %d SCMI Powercap domains !\n", reg_zones);
+
return ret;
}
@@ -424,6 +455,8 @@ static int scmi_powercap_probe(struct scmi_device *sdev)
if (!pr->registered_zones)
return -ENOMEM;
+ INIT_LIST_HEAD(&pr->scmi_zones);
+
for (i = 0, spz = pr->spzones; i < pr->num_zones; i++, spz++) {
/*
* Powercap domains are validate by the protocol layer, i.e.
@@ -438,6 +471,7 @@ static int scmi_powercap_probe(struct scmi_device *sdev)
INIT_LIST_HEAD(&spz->node);
INIT_LIST_HEAD(&pr->registered_zones[i]);
+ list_add_tail(&spz->node, &pr->scmi_zones);
/*
* Forcibly skip powercap domains using an abstract scale.
* Note that only leaves domains can be skipped, so this could
@@ -448,7 +482,7 @@ static int scmi_powercap_probe(struct scmi_device *sdev)
dev_warn(dev,
"Abstract power scale not supported. Skip %s.\n",
spz->info->name);
- spz->info = NULL;
+ spz->invalid = true;
continue;
}
}
@@ -457,21 +491,12 @@ static int scmi_powercap_probe(struct scmi_device *sdev)
* Scan array of retrieved SCMI powercap domains and register them
* recursively starting from the root domains.
*/
- for (i = 0, spz = pr->spzones; i < pr->num_zones; i++, spz++) {
- ret = scmi_powercap_register_zone(pr, spz);
- if (ret) {
- dev_err(dev,
- "Failed to register powercap zone %s - ret:%d\n",
- spz->info->name, ret);
- scmi_powercap_unregister_all_zones(pr);
- return ret;
- }
- }
+ ret = scmi_zones_register(dev, pr);
+ if (ret)
+ return ret;
dev_set_drvdata(dev, pr);
- dev_info(dev, "Registered %d SCMI Powercap domains !\n", pr->num_zones);
-
return ret;
}
diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 4e646e5e48f6..5c2e6d5eea2a 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -818,7 +818,7 @@ static int rapl_read_data_raw(struct rapl_domain *rd,
return -EINVAL;
ra.reg = rd->regs[rpi->id];
- if (!ra.reg)
+ if (!ra.reg.val)
return -EINVAL;
/* non-hardware data are collected by the polling thread */
@@ -830,7 +830,7 @@ static int rapl_read_data_raw(struct rapl_domain *rd,
ra.mask = rpi->mask;
if (rd->rp->priv->read_raw(get_rid(rd->rp), &ra)) {
- pr_debug("failed to read reg 0x%llx for %s:%s\n", ra.reg, rd->rp->name, rd->name);
+ pr_debug("failed to read reg 0x%llx for %s:%s\n", ra.reg.val, rd->rp->name, rd->name);
return -EIO;
}
@@ -920,7 +920,7 @@ static int rapl_check_unit_core(struct rapl_domain *rd)
ra.mask = ~0;
if (rd->rp->priv->read_raw(get_rid(rd->rp), &ra)) {
pr_err("Failed to read power unit REG 0x%llx on %s:%s, exit.\n",
- ra.reg, rd->rp->name, rd->name);
+ ra.reg.val, rd->rp->name, rd->name);
return -ENODEV;
}
@@ -948,7 +948,7 @@ static int rapl_check_unit_atom(struct rapl_domain *rd)
ra.mask = ~0;
if (rd->rp->priv->read_raw(get_rid(rd->rp), &ra)) {
pr_err("Failed to read power unit REG 0x%llx on %s:%s, exit.\n",
- ra.reg, rd->rp->name, rd->name);
+ ra.reg.val, rd->rp->name, rd->name);
return -ENODEV;
}
@@ -1135,7 +1135,7 @@ static int rapl_check_unit_tpmi(struct rapl_domain *rd)
ra.mask = ~0;
if (rd->rp->priv->read_raw(get_rid(rd->rp), &ra)) {
pr_err("Failed to read power unit REG 0x%llx on %s:%s, exit.\n",
- ra.reg, rd->rp->name, rd->name);
+ ra.reg.val, rd->rp->name, rd->name);
return -ENODEV;
}
@@ -1250,7 +1250,7 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE, &rapl_defaults_core),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, &rapl_defaults_core),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, &rapl_defaults_core),
- X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_N, &rapl_defaults_core),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GRACEMONT, &rapl_defaults_core),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE, &rapl_defaults_core),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_P, &rapl_defaults_core),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_S, &rapl_defaults_core),
@@ -1411,8 +1411,8 @@ static int rapl_get_domain_unit(struct rapl_domain *rd)
struct rapl_defaults *defaults = get_defaults(rd->rp);
int ret;
- if (!rd->regs[RAPL_DOMAIN_REG_UNIT]) {
- if (!rd->rp->priv->reg_unit) {
+ if (!rd->regs[RAPL_DOMAIN_REG_UNIT].val) {
+ if (!rd->rp->priv->reg_unit.val) {
pr_err("No valid Unit register found\n");
return -ENODEV;
}
@@ -1485,7 +1485,7 @@ static int rapl_detect_domains(struct rapl_package *rp)
}
pr_debug("found %d domains on %s\n", rp->nr_domains, rp->name);
- rp->domains = kcalloc(rp->nr_domains + 1, sizeof(struct rapl_domain),
+ rp->domains = kcalloc(rp->nr_domains, sizeof(struct rapl_domain),
GFP_KERNEL);
if (!rp->domains)
return -ENOMEM;
diff --git a/drivers/powercap/intel_rapl_msr.c b/drivers/powercap/intel_rapl_msr.c
index 569e25eab1e1..250bd41a588c 100644
--- a/drivers/powercap/intel_rapl_msr.c
+++ b/drivers/powercap/intel_rapl_msr.c
@@ -34,28 +34,32 @@ static struct rapl_if_priv *rapl_msr_priv;
static struct rapl_if_priv rapl_msr_priv_intel = {
.type = RAPL_IF_MSR,
- .reg_unit = MSR_RAPL_POWER_UNIT,
- .regs[RAPL_DOMAIN_PACKAGE] = {
- MSR_PKG_POWER_LIMIT, MSR_PKG_ENERGY_STATUS, MSR_PKG_PERF_STATUS, 0, MSR_PKG_POWER_INFO },
- .regs[RAPL_DOMAIN_PP0] = {
- MSR_PP0_POWER_LIMIT, MSR_PP0_ENERGY_STATUS, 0, MSR_PP0_POLICY, 0 },
- .regs[RAPL_DOMAIN_PP1] = {
- MSR_PP1_POWER_LIMIT, MSR_PP1_ENERGY_STATUS, 0, MSR_PP1_POLICY, 0 },
- .regs[RAPL_DOMAIN_DRAM] = {
- MSR_DRAM_POWER_LIMIT, MSR_DRAM_ENERGY_STATUS, MSR_DRAM_PERF_STATUS, 0, MSR_DRAM_POWER_INFO },
- .regs[RAPL_DOMAIN_PLATFORM] = {
- MSR_PLATFORM_POWER_LIMIT, MSR_PLATFORM_ENERGY_STATUS, 0, 0, 0},
+ .reg_unit.msr = MSR_RAPL_POWER_UNIT,
+ .regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_LIMIT].msr = MSR_PKG_POWER_LIMIT,
+ .regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_STATUS].msr = MSR_PKG_ENERGY_STATUS,
+ .regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_PERF].msr = MSR_PKG_PERF_STATUS,
+ .regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_INFO].msr = MSR_PKG_POWER_INFO,
+ .regs[RAPL_DOMAIN_PP0][RAPL_DOMAIN_REG_LIMIT].msr = MSR_PP0_POWER_LIMIT,
+ .regs[RAPL_DOMAIN_PP0][RAPL_DOMAIN_REG_STATUS].msr = MSR_PP0_ENERGY_STATUS,
+ .regs[RAPL_DOMAIN_PP0][RAPL_DOMAIN_REG_POLICY].msr = MSR_PP0_POLICY,
+ .regs[RAPL_DOMAIN_PP1][RAPL_DOMAIN_REG_LIMIT].msr = MSR_PP1_POWER_LIMIT,
+ .regs[RAPL_DOMAIN_PP1][RAPL_DOMAIN_REG_STATUS].msr = MSR_PP1_ENERGY_STATUS,
+ .regs[RAPL_DOMAIN_PP1][RAPL_DOMAIN_REG_POLICY].msr = MSR_PP1_POLICY,
+ .regs[RAPL_DOMAIN_DRAM][RAPL_DOMAIN_REG_LIMIT].msr = MSR_DRAM_POWER_LIMIT,
+ .regs[RAPL_DOMAIN_DRAM][RAPL_DOMAIN_REG_STATUS].msr = MSR_DRAM_ENERGY_STATUS,
+ .regs[RAPL_DOMAIN_DRAM][RAPL_DOMAIN_REG_PERF].msr = MSR_DRAM_PERF_STATUS,
+ .regs[RAPL_DOMAIN_DRAM][RAPL_DOMAIN_REG_INFO].msr = MSR_DRAM_POWER_INFO,
+ .regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_LIMIT].msr = MSR_PLATFORM_POWER_LIMIT,
+ .regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_STATUS].msr = MSR_PLATFORM_ENERGY_STATUS,
.limits[RAPL_DOMAIN_PACKAGE] = BIT(POWER_LIMIT2),
.limits[RAPL_DOMAIN_PLATFORM] = BIT(POWER_LIMIT2),
};
static struct rapl_if_priv rapl_msr_priv_amd = {
.type = RAPL_IF_MSR,
- .reg_unit = MSR_AMD_RAPL_POWER_UNIT,
- .regs[RAPL_DOMAIN_PACKAGE] = {
- 0, MSR_AMD_PKG_ENERGY_STATUS, 0, 0, 0 },
- .regs[RAPL_DOMAIN_PP0] = {
- 0, MSR_AMD_CORE_ENERGY_STATUS, 0, 0, 0 },
+ .reg_unit.msr = MSR_AMD_RAPL_POWER_UNIT,
+ .regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_STATUS].msr = MSR_AMD_PKG_ENERGY_STATUS,
+ .regs[RAPL_DOMAIN_PP0][RAPL_DOMAIN_REG_STATUS].msr = MSR_AMD_CORE_ENERGY_STATUS,
};
/* Handles CPU hotplug on multi-socket systems.
@@ -99,10 +103,8 @@ static int rapl_cpu_down_prep(unsigned int cpu)
static int rapl_msr_read_raw(int cpu, struct reg_action *ra)
{
- u32 msr = (u32)ra->reg;
-
- if (rdmsrl_safe_on_cpu(cpu, msr, &ra->value)) {
- pr_debug("failed to read msr 0x%x on cpu %d\n", msr, cpu);
+ if (rdmsrl_safe_on_cpu(cpu, ra->reg.msr, &ra->value)) {
+ pr_debug("failed to read msr 0x%x on cpu %d\n", ra->reg.msr, cpu);
return -EIO;
}
ra->value &= ra->mask;
@@ -112,17 +114,16 @@ static int rapl_msr_read_raw(int cpu, struct reg_action *ra)
static void rapl_msr_update_func(void *info)
{
struct reg_action *ra = info;
- u32 msr = (u32)ra->reg;
u64 val;
- ra->err = rdmsrl_safe(msr, &val);
+ ra->err = rdmsrl_safe(ra->reg.msr, &val);
if (ra->err)
return;
val &= ~ra->mask;
val |= ra->value;
- ra->err = wrmsrl_safe(msr, val);
+ ra->err = wrmsrl_safe(ra->reg.msr, val);
}
static int rapl_msr_write_raw(int cpu, struct reg_action *ra)
@@ -141,7 +142,7 @@ static const struct x86_cpu_id pl4_support_ids[] = {
X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L, NULL),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, NULL),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, NULL),
- X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_N, NULL),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GRACEMONT, NULL),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE, NULL),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_P, NULL),
X86_MATCH_INTEL_FAM6_MODEL(METEORLAKE, NULL),
@@ -171,7 +172,7 @@ static int rapl_msr_probe(struct platform_device *pdev)
if (id) {
rapl_msr_priv->limits[RAPL_DOMAIN_PACKAGE] |= BIT(POWER_LIMIT4);
- rapl_msr_priv->regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_PL4] =
+ rapl_msr_priv->regs[RAPL_DOMAIN_PACKAGE][RAPL_DOMAIN_REG_PL4].msr =
MSR_VR_CURRENT_CONFIG;
pr_info("PL4 support detected.\n");
}
diff --git a/drivers/powercap/intel_rapl_tpmi.c b/drivers/powercap/intel_rapl_tpmi.c
index 4f4f13ded225..891c90fefd8b 100644
--- a/drivers/powercap/intel_rapl_tpmi.c
+++ b/drivers/powercap/intel_rapl_tpmi.c
@@ -59,10 +59,10 @@ static struct powercap_control_type *tpmi_control_type;
static int tpmi_rapl_read_raw(int id, struct reg_action *ra)
{
- if (!ra->reg)
+ if (!ra->reg.mmio)
return -EINVAL;
- ra->value = readq((void __iomem *)ra->reg);
+ ra->value = readq(ra->reg.mmio);
ra->value &= ra->mask;
return 0;
@@ -72,15 +72,15 @@ static int tpmi_rapl_write_raw(int id, struct reg_action *ra)
{
u64 val;
- if (!ra->reg)
+ if (!ra->reg.mmio)
return -EINVAL;
- val = readq((void __iomem *)ra->reg);
+ val = readq(ra->reg.mmio);
val &= ~ra->mask;
val |= ra->value;
- writeq(val, (void __iomem *)ra->reg);
+ writeq(val, ra->reg.mmio);
return 0;
}
@@ -138,8 +138,7 @@ static int parse_one_domain(struct tpmi_rapl_package *trp, u32 offset)
enum tpmi_rapl_register reg_index;
enum rapl_domain_reg_id reg_id;
int tpmi_domain_size, tpmi_domain_flags;
- u64 *tpmi_rapl_regs = trp->base + offset;
- u64 tpmi_domain_header = readq((void __iomem *)tpmi_rapl_regs);
+ u64 tpmi_domain_header = readq(trp->base + offset);
/* Domain Parent bits are ignored for now */
tpmi_domain_version = tpmi_domain_header & 0xff;
@@ -180,7 +179,7 @@ static int parse_one_domain(struct tpmi_rapl_package *trp, u32 offset)
return -EINVAL;
}
- if (trp->priv.regs[domain_type][RAPL_DOMAIN_REG_UNIT]) {
+ 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;
}
@@ -218,7 +217,7 @@ static int parse_one_domain(struct tpmi_rapl_package *trp, u32 offset)
default:
continue;
}
- trp->priv.regs[domain_type][reg_id] = (u64)&tpmi_rapl_regs[reg_index];
+ trp->priv.regs[domain_type][reg_id].mmio = trp->base + offset + reg_index * 8;
}
return 0;
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-20 08:50:36 +0000