[PATCH v3 2/4] ACPI: CPPC: Refactor register value get and set ABIs

Lifeng Zheng
2024-12-16T09:16:08Z

Refactor register value get and set ABIs by using cppc_get_reg_val() and
cppc_set_reg_val().

Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
---
drivers/acpi/cppc_acpi.c | 111 +++------------------------------------
1 file changed, 7 insertions(+), 104 deletions(-)

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index bb5333a503a2..83c7fcad74ad 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -1602,44 +1602,14 @@ EXPORT_SYMBOL_GPL(cppc_set_epp_perf);
*/
int cppc_get_auto_sel_caps(int cpunum, struct cppc_perf_caps *perf_caps)
{
- struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpunum);
- struct cpc_register_resource *auto_sel_reg;
- u64 auto_sel;
-
- if (!cpc_desc) {
- pr_debug("No CPC descriptor for CPU:%d\n", cpunum);
- return -ENODEV;
- }
-
- auto_sel_reg = &cpc_desc->cpc_regs[AUTO_SEL_ENABLE];
-
- if (!CPC_SUPPORTED(auto_sel_reg))
- pr_warn_once("Autonomous mode is not unsupported!\n");
-
- if (CPC_IN_PCC(auto_sel_reg)) {
- int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpunum);
- struct cppc_pcc_data *pcc_ss_data = NULL;
- int ret = 0;
-
- if (pcc_ss_id < 0)
- return -ENODEV;
-
- pcc_ss_data = pcc_data[pcc_ss_id];
-
- down_write(&pcc_ss_data->pcc_lock);
-
- if (send_pcc_cmd(pcc_ss_id, CMD_READ) >= 0) {
- cpc_read(cpunum, auto_sel_reg, &auto_sel);
- perf_caps->auto_sel = (bool)auto_sel;
- } else {
- ret = -EIO;
- }
-
- up_write(&pcc_ss_data->pcc_lock);
+ u64 auto_sel;
+ int ret;

+ ret = cppc_get_reg_val(cpunum, AUTO_SEL_ENABLE, &auto_sel);
+ if (ret)
return ret;
- }

+ perf_caps->auto_sel = (bool)auto_sel;
return 0;
}
EXPORT_SYMBOL_GPL(cppc_get_auto_sel_caps);
@@ -1651,43 +1621,7 @@ EXPORT_SYMBOL_GPL(cppc_get_auto_sel_caps);
*/
int cppc_set_auto_sel(int cpu, bool enable)
{
- int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
- struct cpc_register_resource *auto_sel_reg;
- struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu);
- struct cppc_pcc_data *pcc_ss_data = NULL;
- int ret = -EINVAL;
-
- if (!cpc_desc) {
- pr_debug("No CPC descriptor for CPU:%d\n", cpu);
- return -ENODEV;
- }
-
- auto_sel_reg = &cpc_desc->cpc_regs[AUTO_SEL_ENABLE];
-
- if (CPC_IN_PCC(auto_sel_reg)) {
- if (pcc_ss_id < 0) {
- pr_debug("Invalid pcc_ss_id\n");
- return -ENODEV;
- }
-
- if (CPC_SUPPORTED(auto_sel_reg)) {
- ret = cpc_write(cpu, auto_sel_reg, enable);
- if (ret)
- return ret;
- }
-
- pcc_ss_data = pcc_data[pcc_ss_id];
-
- down_write(&pcc_ss_data->pcc_lock);
- /* after writing CPC, transfer the ownership of PCC to platform */
- ret = send_pcc_cmd(pcc_ss_id, CMD_WRITE);
- up_write(&pcc_ss_data->pcc_lock);
- } else {
- ret = -ENOTSUPP;
- pr_debug("_CPC in PCC is not supported\n");
- }
-
- return ret;
+ return cppc_set_reg_val(cpu, AUTO_SEL_ENABLE, enable);
}
EXPORT_SYMBOL_GPL(cppc_set_auto_sel);

@@ -1701,38 +1635,7 @@ EXPORT_SYMBOL_GPL(cppc_set_auto_sel);
*/
int cppc_set_enable(int cpu, bool enable)
{
- int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
- struct cpc_register_resource *enable_reg;
- struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu);
- struct cppc_pcc_data *pcc_ss_data = NULL;
- int ret = -EINVAL;
-
- if (!cpc_desc) {
- pr_debug("No CPC descriptor for CPU:%d\n", cpu);
- return -EINVAL;
- }
-
- enable_reg = &cpc_desc->cpc_regs[ENABLE];
-
- if (CPC_IN_PCC(enable_reg)) {
-
- if (pcc_ss_id < 0)
- return -EIO;
-
- ret = cpc_write(cpu, enable_reg, enable);
- if (ret)
- return ret;
-
- pcc_ss_data = pcc_data[pcc_ss_id];
-
- down_write(&pcc_ss_data->pcc_lock);
- /* after writing CPC, transfer the ownership of PCC to platfrom */
- ret = send_pcc_cmd(pcc_ss_id, CMD_WRITE);
- up_write(&pcc_ss_data->pcc_lock);
- return ret;
- }
-
- return cpc_write(cpu, enable_reg, enable);
+ return cppc_set_reg_val(cpu, ENABLE, enable);
}
EXPORT_SYMBOL_GPL(cppc_set_enable);

--
2.33.0