diff options
author | Jakub Kicinski <kuba@kernel.org> | 2024-03-22 02:14:13 +0300 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2024-03-22 02:15:08 +0300 |
commit | 537c2e91d3549e5d6020bb0576cf9b54a845255f (patch) | |
tree | c09e8a1b7d733cde19b0c72678c28fb2bc97ff6b /drivers/pmdomain/core.c | |
parent | 237bb5f7f7f55ec5f773469a974c61a49c298625 (diff) | |
parent | cba9ffdb9913dfe6be29f049ce920ce451ce7cc4 (diff) | |
download | linux-537c2e91d3549e5d6020bb0576cf9b54a845255f.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/pmdomain/core.c')
-rw-r--r-- | drivers/pmdomain/core.c | 141 |
1 files changed, 86 insertions, 55 deletions
diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 18e232b5ed53..4215ffd9b11c 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -311,72 +311,102 @@ static int genpd_xlate_performance_state(struct generic_pm_domain *genpd, } static int _genpd_set_performance_state(struct generic_pm_domain *genpd, - unsigned int state, int depth) + unsigned int state, int depth); + +static void _genpd_rollback_parent_state(struct gpd_link *link, int depth) { - struct generic_pm_domain *parent; - struct gpd_link *link; - int parent_state, ret; + struct generic_pm_domain *parent = link->parent; + int parent_state; - if (state == genpd->performance_state) - return 0; + genpd_lock_nested(parent, depth + 1); - /* Propagate to parents of genpd */ - list_for_each_entry(link, &genpd->child_links, child_node) { - parent = link->parent; + parent_state = link->prev_performance_state; + link->performance_state = parent_state; - /* Find parent's performance state */ - ret = genpd_xlate_performance_state(genpd, parent, state); - if (unlikely(ret < 0)) - goto err; + parent_state = _genpd_reeval_performance_state(parent, parent_state); + if (_genpd_set_performance_state(parent, parent_state, depth + 1)) { + pr_err("%s: Failed to roll back to %d performance state\n", + parent->name, parent_state); + } - parent_state = ret; + genpd_unlock(parent); +} - genpd_lock_nested(parent, depth + 1); +static int _genpd_set_parent_state(struct generic_pm_domain *genpd, + struct gpd_link *link, + unsigned int state, int depth) +{ + struct generic_pm_domain *parent = link->parent; + int parent_state, ret; - link->prev_performance_state = link->performance_state; - link->performance_state = parent_state; - parent_state = _genpd_reeval_performance_state(parent, - parent_state); - ret = _genpd_set_performance_state(parent, parent_state, depth + 1); - if (ret) - link->performance_state = link->prev_performance_state; + /* Find parent's performance state */ + ret = genpd_xlate_performance_state(genpd, parent, state); + if (unlikely(ret < 0)) + return ret; - genpd_unlock(parent); + parent_state = ret; - if (ret) - goto err; - } + genpd_lock_nested(parent, depth + 1); - if (genpd->set_performance_state) { - ret = genpd->set_performance_state(genpd, state); - if (ret) - goto err; - } + link->prev_performance_state = link->performance_state; + link->performance_state = parent_state; - genpd->performance_state = state; - return 0; + parent_state = _genpd_reeval_performance_state(parent, parent_state); + ret = _genpd_set_performance_state(parent, parent_state, depth + 1); + if (ret) + link->performance_state = link->prev_performance_state; -err: - /* Encountered an error, lets rollback */ - list_for_each_entry_continue_reverse(link, &genpd->child_links, - child_node) { - parent = link->parent; + genpd_unlock(parent); - genpd_lock_nested(parent, depth + 1); + return ret; +} + +static int _genpd_set_performance_state(struct generic_pm_domain *genpd, + unsigned int state, int depth) +{ + struct gpd_link *link = NULL; + int ret; + + if (state == genpd->performance_state) + return 0; - parent_state = link->prev_performance_state; - link->performance_state = parent_state; + /* When scaling up, propagate to parents first in normal order */ + if (state > genpd->performance_state) { + list_for_each_entry(link, &genpd->child_links, child_node) { + ret = _genpd_set_parent_state(genpd, link, state, depth); + if (ret) + goto rollback_parents_up; + } + } - parent_state = _genpd_reeval_performance_state(parent, - parent_state); - if (_genpd_set_performance_state(parent, parent_state, depth + 1)) { - pr_err("%s: Failed to roll back to %d performance state\n", - parent->name, parent_state); + if (genpd->set_performance_state) { + ret = genpd->set_performance_state(genpd, state); + if (ret) { + if (link) + goto rollback_parents_up; + return ret; } + } - genpd_unlock(parent); + /* When scaling down, propagate to parents last in reverse order */ + if (state < genpd->performance_state) { + list_for_each_entry_reverse(link, &genpd->child_links, child_node) { + ret = _genpd_set_parent_state(genpd, link, state, depth); + if (ret) + goto rollback_parents_down; + } } + genpd->performance_state = state; + return 0; + +rollback_parents_up: + list_for_each_entry_continue_reverse(link, &genpd->child_links, child_node) + _genpd_rollback_parent_state(link, depth); + return ret; +rollback_parents_down: + list_for_each_entry_continue(link, &genpd->child_links, child_node) + _genpd_rollback_parent_state(link, depth); return ret; } @@ -1100,6 +1130,7 @@ static int __init genpd_power_off_unused(void) return 0; } + pr_info("genpd: Disabling unused power domains\n"); mutex_lock(&gpd_list_lock); list_for_each_entry(genpd, &gpd_list, gpd_list_node) @@ -2235,7 +2266,7 @@ static DEFINE_MUTEX(of_genpd_mutex); * to be a valid pointer to struct generic_pm_domain. */ static struct generic_pm_domain *genpd_xlate_simple( - struct of_phandle_args *genpdspec, + const struct of_phandle_args *genpdspec, void *data) { return data; @@ -2252,7 +2283,7 @@ static struct generic_pm_domain *genpd_xlate_simple( * the genpd_onecell_data struct when registering the provider. */ static struct generic_pm_domain *genpd_xlate_onecell( - struct of_phandle_args *genpdspec, + const struct of_phandle_args *genpdspec, void *data) { struct genpd_onecell_data *genpd_data = data; @@ -2495,7 +2526,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider); * on failure. */ static struct generic_pm_domain *genpd_get_from_provider( - struct of_phandle_args *genpdspec) + const struct of_phandle_args *genpdspec) { struct generic_pm_domain *genpd = ERR_PTR(-ENOENT); struct of_genpd_provider *provider; @@ -2526,7 +2557,7 @@ static struct generic_pm_domain *genpd_get_from_provider( * Looks-up an I/O PM domain based upon phandle args provided and adds * the device to the PM domain. Returns a negative error code on failure. */ -int of_genpd_add_device(struct of_phandle_args *genpdspec, struct device *dev) +int of_genpd_add_device(const struct of_phandle_args *genpdspec, struct device *dev) { struct generic_pm_domain *genpd; int ret; @@ -2560,8 +2591,8 @@ EXPORT_SYMBOL_GPL(of_genpd_add_device); * provided and adds the subdomain to the parent PM domain. Returns a * negative error code on failure. */ -int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, - struct of_phandle_args *subdomain_spec) +int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec, + const struct of_phandle_args *subdomain_spec) { struct generic_pm_domain *parent, *subdomain; int ret; @@ -2598,8 +2629,8 @@ EXPORT_SYMBOL_GPL(of_genpd_add_subdomain); * provided and removes the subdomain from the parent PM domain. Returns a * negative error code on failure. */ -int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, - struct of_phandle_args *subdomain_spec) +int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec, + const struct of_phandle_args *subdomain_spec) { struct generic_pm_domain *parent, *subdomain; int ret; |