qcacld-3.0: Add the sysfs entry for pm_dbs

Previously pm_dbs would be queried via iwpriv
    --> iwpriv wlan0 pm_dbs [dbs] [system_pref]
it is now changed to support via sysfs:
    --> echo [dbs] [system_pref] > /sys/kernel/wifi/pm_dbs

Change-Id: I3f6b153a58be6932cafbc1df15ef4a62971ba954
CRs-Fixed: 2692150

core/hdd/inc/wlan_hdd_sysfs_policy_mgr.h

@@ -59,6 +59,28 @@ int hdd_sysfs_pm_pcl_create(struct kobject *driver_kobject);
  */
 void
 hdd_sysfs_pm_pcl_destroy(struct kobject *driver_kobject);
+
+/**
+ * hdd_sysfs_pm_dbs_create() - API to create pm_dbs
+ * @driver_kobject: sysfs driver kobject
+ *
+ * file path: /sys/kernel/wifi/pm_dbs
+ *
+ * usage:
+ *      echo [dbs] [system_pref] > pm_dbs
+ *
+ * Return: 0 on success and errno on failure
+ */
+int hdd_sysfs_pm_dbs_create(struct kobject *driver_kobject);
+
+/**
+ * hdd_sysfs_pm_dbs_destroy() -
+ *   API to destroy pm_dbs
+ *
+ * Return: none
+ */
+void
+hdd_sysfs_pm_dbs_destroy(struct kobject *driver_kobject);
 #else
 static inline int
 hdd_sysfs_pm_pcl_create(struct kobject *driver_kobject)
@@ -80,5 +102,16 @@ static inline
 void hdd_sysfs_pm_cinfo_destroy(struct kobject *driver_kobject)
 {
 }
+
+static inline int
+hdd_sysfs_pm_dbs_create(struct kobject *driver_kobject)
+{
+	return 0;
+}
+
+static inline void
+hdd_sysfs_pm_dbs_destroy(struct kobject *driver_kobject)
+{
+}
 #endif
 #endif

core/hdd/src/wlan_hdd_sysfs.c

@@ -776,12 +776,14 @@ void hdd_create_sysfs_files(struct hdd_context *hdd_ctx)
 		hdd_sysfs_pktlog_create(driver_kobject);
 		hdd_sysfs_pm_cinfo_create(driver_kobject);
 		hdd_sysfs_pm_pcl_create(driver_kobject);
+		hdd_sysfs_pm_dbs_create(driver_kobject);
 	}
 }
 
 void hdd_destroy_sysfs_files(void)
 {
 	if  (QDF_GLOBAL_MISSION_MODE == hdd_get_conparam()) {
+		hdd_sysfs_pm_dbs_destroy(driver_kobject);
 		hdd_sysfs_pm_pcl_destroy(driver_kobject);
 		hdd_sysfs_pm_cinfo_destroy(driver_kobject);
 		hdd_sysfs_pktlog_destroy(driver_kobject);

core/hdd/src/wlan_hdd_sysfs_policy_mgr.c

@@ -19,6 +19,8 @@
 #include <wlan_hdd_sysfs_policy_mgr.h>
 #include "osif_sync.h"
 #include <wlan_policy_mgr_api.h>
+#include <wma_api.h>
+#include <wlan_policy_mgr_ucfg.h>
 
 static ssize_t hdd_pm_cinfo_show(struct hdd_context *hdd_ctx)
 {
@@ -154,6 +156,104 @@ hdd_sysfs_pm_pcl_store(struct kobject *kobj,
 	return errno_size;
 }
 
+static ssize_t
+__hdd_sysfs_pm_dbs_store(struct hdd_context *hdd_ctx,
+			 struct kobj_attribute *attr,
+			 const char *buf,
+			 size_t count)
+{
+	char buf_local[MAX_SYSFS_USER_COMMAND_SIZE_LENGTH + 1];
+	char *sptr, *token;
+	QDF_STATUS status;
+	int ret, value;
+
+	if (!wlan_hdd_validate_modules_state(hdd_ctx))
+		return -EINVAL;
+
+	ret = hdd_sysfs_validate_and_copy_buf(buf_local, sizeof(buf_local),
+					      buf, count);
+	if (ret) {
+		hdd_err_rl("invalid input");
+		return ret;
+	}
+
+	if (!hdd_ctx->config->is_unit_test_framework_enabled) {
+		hdd_warn_rl("UT framework is disabled");
+		return -EINVAL;
+	}
+
+	sptr = buf_local;
+	hdd_debug("pm_pcl: count %zu buf_local:(%s)",
+		  count, buf_local);
+
+	token = strsep(&sptr, " ");
+	if (!token)
+		return -EINVAL;
+	if (kstrtou32(token, 0, &value))
+		return -EINVAL;
+
+	switch (value) {
+	case 0:
+	case 1:
+		wma_set_dbs_capability_ut(value);
+		break;
+	default:
+		hdd_err_rl("invalid value %d", value);
+		return -EINVAL;
+	}
+
+	token = strsep(&sptr, " ");
+	if (!token)
+		return -EINVAL;
+	if (kstrtou32(token, 0, &value))
+		return -EINVAL;
+
+	switch (value) {
+	case PM_THROUGHPUT:
+	case PM_POWERSAVE:
+	case PM_LATENCY:
+		status = ucfg_policy_mgr_set_sys_pref(hdd_ctx->psoc, value);
+		if (status != QDF_STATUS_SUCCESS) {
+			hdd_err("ucfg_policy_mgr_set_sys_pref failed");
+			return -EINVAL;
+		}
+		break;
+	default:
+		hdd_err_rl("invalid value %d", value);
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+static ssize_t
+hdd_sysfs_pm_dbs_store(struct kobject *kobj,
+		       struct kobj_attribute *attr,
+		       const char *buf,
+		       size_t count)
+{
+	struct osif_psoc_sync *psoc_sync;
+	struct hdd_context *hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
+	ssize_t errno_size;
+	int ret;
+
+	ret = wlan_hdd_validate_context(hdd_ctx);
+	if (ret != 0)
+		return ret;
+
+	errno_size = osif_psoc_sync_op_start(wiphy_dev(hdd_ctx->wiphy),
+					     &psoc_sync);
+	if (errno_size)
+		return errno_size;
+
+	errno_size = __hdd_sysfs_pm_dbs_store(hdd_ctx, attr,
+					      buf, count);
+
+	osif_psoc_sync_op_stop(psoc_sync);
+
+	return errno_size;
+}
+
 static struct kobj_attribute pm_pcl_attribute =
 	__ATTR(pm_pcl, 0220, NULL,
 	       hdd_sysfs_pm_pcl_store);
@@ -162,6 +262,10 @@ static struct kobj_attribute pm_cinfo_attribute =
 	__ATTR(pm_cinfo, 0440,
 	       hdd_sysfs_pm_cminfo_show, NULL);
 
+static struct kobj_attribute pm_dbs_attribute =
+	__ATTR(pm_dbs, 0220, NULL,
+	       hdd_sysfs_pm_dbs_store);
+
 int hdd_sysfs_pm_pcl_create(struct kobject *driver_kobject)
 {
 	int error;
@@ -199,3 +303,30 @@ void hdd_sysfs_pm_cinfo_destroy(struct kobject *driver_kobject)
 {
 	sysfs_remove_file(driver_kobject, &pm_cinfo_attribute.attr);
 }
+
+int hdd_sysfs_pm_dbs_create(struct kobject *driver_kobject)
+{
+	int error;
+
+	if (!driver_kobject) {
+		hdd_err("could not get driver kobject!");
+		return -EINVAL;
+	}
+
+	error = sysfs_create_file(driver_kobject,
+				  &pm_dbs_attribute.attr);
+	if (error)
+		hdd_err("could not create pm_dbs sysfs file");
+
+	return error;
+}
+
+void
+hdd_sysfs_pm_dbs_destroy(struct kobject *driver_kobject)
+{
+	if (!driver_kobject) {
+		hdd_err("could not get driver kobject!");
+		return;
+	}
+	sysfs_remove_file(driver_kobject, &pm_dbs_attribute.attr);
+}