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authorZhang Rui <rui.zhang@intel.com>2019-07-10 15:44:28 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-07-11 15:08:57 +0200
commit8a00676cd690941c9a18bd390c3b2cade631c516 (patch)
treedbbb0ece835d52019ccf1a0fec1f34438a7080d0 /drivers/powercap
parentintel_rapl: abstract register access operations (diff)
downloadlinux-8a00676cd690941c9a18bd390c3b2cade631c516.tar.xz
linux-8a00676cd690941c9a18bd390c3b2cade631c516.zip
intel_rapl: cleanup some functions
Previously, there are three functions: rapl_register_psys(), which registers platform rapl domain. rapl_register_powercap(), which registers powercap control type. rapl_unregsiter_powercap(), which unregisters platform rapl domain and powercap control type. This is confusing as the function name does not describe what it does clearly. With this patch, the three functions are removed, and two new functions rapl_register_platform_domain()/rapl_unregister_platform_domain() are introduced instead, and they do exactly what their function name describes. Plus, as part of the common code, hardcoded MSR accesses in these functions are converted to follow the abstracted register access. Reviewed-by: Pandruvada, Srinivas <srinivas.pandruvada@intel.com> Tested-by: Pandruvada, Srinivas <srinivas.pandruvada@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/powercap')
-rw-r--r--drivers/powercap/intel_rapl.c62
1 files changed, 31 insertions, 31 deletions
diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c
index d3b9d1cf4d48..7a97d331bcdc 100644
--- a/drivers/powercap/intel_rapl.c
+++ b/drivers/powercap/intel_rapl.c
@@ -1052,16 +1052,6 @@ static void rapl_update_domain_data(struct rapl_package *rp)
}
-static void rapl_unregister_powercap(void)
-{
- if (&rapl_msr_priv.platform_rapl_domain) {
- powercap_unregister_zone(rapl_msr_priv.control_type,
- &rapl_msr_priv.platform_rapl_domain->power_zone);
- kfree(rapl_msr_priv.platform_rapl_domain);
- }
- powercap_unregister_control_type(rapl_msr_priv.control_type);
-}
-
static int rapl_package_register_powercap(struct rapl_package *rp)
{
struct rapl_domain *rd;
@@ -1131,16 +1121,23 @@ err_cleanup:
return ret;
}
-static int __init rapl_register_psys(void)
+static int __init rapl_add_platform_domain(struct rapl_if_priv *priv)
{
struct rapl_domain *rd;
struct powercap_zone *power_zone;
- u64 val;
+ struct reg_action ra;
+ int ret;
- if (rdmsrl_safe_on_cpu(0, rapl_msr_priv.regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_STATUS], &val) || !val)
+ ra.reg = priv->regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_STATUS];
+ ra.mask = ~0;
+ ret = priv->read_raw(0, &ra);
+ if (ret || !ra.value)
return -ENODEV;
- if (rdmsrl_safe_on_cpu(0, rapl_msr_priv.regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_LIMIT], &val) || !val)
+ ra.reg = priv->regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_LIMIT];
+ ra.mask = ~0;
+ ret = priv->read_raw(0, &ra);
+ if (ret || !ra.value)
return -ENODEV;
rd = kzalloc(sizeof(*rd), GFP_KERNEL);
@@ -1149,15 +1146,15 @@ static int __init rapl_register_psys(void)
rd->name = rapl_domain_names[RAPL_DOMAIN_PLATFORM];
rd->id = RAPL_DOMAIN_PLATFORM;
- rd->regs[RAPL_DOMAIN_REG_LIMIT] = rapl_msr_priv.regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_LIMIT];
- rd->regs[RAPL_DOMAIN_REG_STATUS] = rapl_msr_priv.regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_STATUS];
+ rd->regs[RAPL_DOMAIN_REG_LIMIT] = priv->regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_LIMIT];
+ rd->regs[RAPL_DOMAIN_REG_STATUS] = priv->regs[RAPL_DOMAIN_PLATFORM][RAPL_DOMAIN_REG_STATUS];
rd->rpl[0].prim_id = PL1_ENABLE;
rd->rpl[0].name = pl1_name;
rd->rpl[1].prim_id = PL2_ENABLE;
rd->rpl[1].name = pl2_name;
- rd->rp = rapl_find_package_domain(0, &rapl_msr_priv);
+ rd->rp = rapl_find_package_domain(0, priv);
- power_zone = powercap_register_zone(&rd->power_zone, rapl_msr_priv.control_type,
+ power_zone = powercap_register_zone(&rd->power_zone, priv->control_type,
"psys", NULL,
&zone_ops[RAPL_DOMAIN_PLATFORM],
2, &constraint_ops);
@@ -1167,19 +1164,18 @@ static int __init rapl_register_psys(void)
return PTR_ERR(power_zone);
}
- rapl_msr_priv.platform_rapl_domain = rd;
+ priv->platform_rapl_domain = rd;
return 0;
}
-static int __init rapl_register_powercap(void)
+static void rapl_remove_platform_domain(struct rapl_if_priv *priv)
{
- rapl_msr_priv.control_type = powercap_register_control_type(NULL, "intel-rapl", NULL);
- if (IS_ERR(rapl_msr_priv.control_type)) {
- pr_debug("failed to register powercap control_type.\n");
- return PTR_ERR(rapl_msr_priv.control_type);
+ if (priv->platform_rapl_domain) {
+ powercap_unregister_zone(priv->control_type,
+ &priv->platform_rapl_domain->power_zone);
+ kfree(priv->platform_rapl_domain);
}
- return 0;
}
static int rapl_check_domain(int cpu, int domain, struct rapl_package *rp)
@@ -1526,9 +1522,12 @@ static int __init rapl_init(void)
rapl_msr_priv.read_raw = rapl_msr_read_raw;
rapl_msr_priv.write_raw = rapl_msr_write_raw;
- ret = rapl_register_powercap();
- if (ret)
- return ret;
+
+ rapl_msr_priv.control_type = powercap_register_control_type(NULL, "intel-rapl", NULL);
+ if (IS_ERR(rapl_msr_priv.control_type)) {
+ pr_debug("failed to register powercap control_type.\n");
+ return PTR_ERR(rapl_msr_priv.control_type);
+ }
ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powercap/rapl:online",
rapl_cpu_online, rapl_cpu_down_prep);
@@ -1537,7 +1536,7 @@ static int __init rapl_init(void)
rapl_msr_priv.pcap_rapl_online = ret;
/* Don't bail out if PSys is not supported */
- rapl_register_psys();
+ rapl_add_platform_domain(&rapl_msr_priv);
ret = register_pm_notifier(&rapl_pm_notifier);
if (ret)
@@ -1549,7 +1548,7 @@ err_unreg_all:
cpuhp_remove_state(rapl_msr_priv.pcap_rapl_online);
err_unreg:
- rapl_unregister_powercap();
+ powercap_unregister_control_type(rapl_msr_priv.control_type);
return ret;
}
@@ -1557,7 +1556,8 @@ static void __exit rapl_exit(void)
{
unregister_pm_notifier(&rapl_pm_notifier);
cpuhp_remove_state(rapl_msr_priv.pcap_rapl_online);
- rapl_unregister_powercap();
+ rapl_remove_platform_domain(&rapl_msr_priv);
+ powercap_unregister_control_type(rapl_msr_priv.control_type);
}
module_init(rapl_init);