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Merge back earlier power capping changes for v6.6.

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This commit is contained in:
Rafael J. Wysocki 2023-08-04 22:48:58 +02:00
commit 9784239529
2 changed files with 93 additions and 68 deletions
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159
drivers/powercap/arm_scmi_powercap.c
View File

@ -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;
unsigned int sp = 0, reg_zones = 0;
struct scmi_powercap_zone *spz, **zones_stack;
if (!spz->info)
return ret;
zones_stack = kcalloc(pr->num_zones, sizeof(spz), GFP_KERNEL);
if (!zones_stack)
return -ENOMEM;
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;
spz = list_first_entry_or_null(&pr->scmi_zones,
struct scmi_powercap_zone, node);
while (spz) {
struct scmi_powercap_zone *parent;
ret = scmi_powercap_register_zone(pr, parent);
if (ret)
return ret;
}
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;
}

2
drivers/powercap/intel_rapl_common.c
View File

@ -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;