iwlwifi: mvm: add ctdp operations to debugfs

Add debugfs entries to get the ctdp budget average
and to stop ctdp.

Signed-off-by: Chaya Rachel Ivgi <chaya.rachel.ivgi@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

2 files changed, 86 insertions, 34 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 56e6b0b8b9cc..a43b3921c4c1 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -73,6 +73,44 @@
 #include "debugfs.h"
 #include "iwl-fw-error-dump.h"
 
+static ssize_t iwl_dbgfs_ctdp_budget_read(struct file *file,
+                                          char __user *user_buf,
+                                          size_t count, loff_t *ppos)
+{
+        struct iwl_mvm *mvm = file->private_data;
+        char buf[16];
+        int pos, budget;
+
+        if (!mvm->ucode_loaded || mvm->cur_ucode != IWL_UCODE_REGULAR)
+                return -EIO;
+
+        mutex_lock(&mvm->mutex);
+        budget = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_REPORT, 0);
+        mutex_unlock(&mvm->mutex);
+
+        if (budget < 0)
+                return budget;
+
+        pos = scnprintf(buf, sizeof(buf), "%d\n", budget);
+
+        return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+}
+
+static ssize_t iwl_dbgfs_stop_ctdp_write(struct iwl_mvm *mvm, char *buf,
+                                         size_t count, loff_t *ppos)
+{
+        int ret;
+
+        if (!mvm->ucode_loaded || mvm->cur_ucode != IWL_UCODE_REGULAR)
+                return -EIO;
+
+        mutex_lock(&mvm->mutex);
+        ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_STOP, 0);
+        mutex_unlock(&mvm->mutex);
+
+        return ret ?: count;
+}
+
 static ssize_t iwl_dbgfs_tx_flush_write(struct iwl_mvm *mvm, char *buf,
                                         size_t count, loff_t *ppos)
 {
@@ -1493,6 +1531,8 @@ iwl_dbgfs_send_echo_cmd_write(struct iwl_mvm *mvm, char *buf,
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(prph_reg, 64);
 
 /* Device wide debugfs entries */
+MVM_DEBUGFS_READ_FILE_OPS(ctdp_budget);
+MVM_DEBUGFS_WRITE_FILE_OPS(stop_ctdp, 8);
 MVM_DEBUGFS_WRITE_FILE_OPS(tx_flush, 16);
 MVM_DEBUGFS_WRITE_FILE_OPS(sta_drain, 8);
 MVM_DEBUGFS_WRITE_FILE_OPS(send_echo_cmd, 8);
@@ -1542,6 +1582,8 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
         MVM_DEBUGFS_ADD_FILE(set_nic_temperature, mvm->debugfs_dir,
                              S_IWUSR | S_IRUSR);
         MVM_DEBUGFS_ADD_FILE(nic_temp, dbgfs_dir, S_IRUSR);
+        MVM_DEBUGFS_ADD_FILE(ctdp_budget, dbgfs_dir, S_IRUSR);
+        MVM_DEBUGFS_ADD_FILE(stop_ctdp, dbgfs_dir, S_IWUSR);
         MVM_DEBUGFS_ADD_FILE(stations, dbgfs_dir, S_IRUSR);
         MVM_DEBUGFS_ADD_FILE(bt_notif, dbgfs_dir, S_IRUSR);
         MVM_DEBUGFS_ADD_FILE(bt_cmd, dbgfs_dir, S_IRUSR);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
index 0a02e9835d6b..ce0c6fd183bb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
@@ -510,6 +510,50 @@ static const struct iwl_tt_params iwl_mvm_default_tt_params = {
         .support_tx_backoff = true,
 };
 
+int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 budget)
+{
+        struct iwl_mvm_ctdp_cmd cmd = {
+                .operation = cpu_to_le32(op),
+                .budget = cpu_to_le32(budget),
+                .window_size = 0,
+        };
+        int ret;
+        u32 status;
+
+        lockdep_assert_held(&mvm->mutex);
+
+        ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
+                                                       CTDP_CONFIG_CMD),
+                                          sizeof(cmd), &cmd, &status);
+
+        if (ret) {
+                IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
+                return ret;
+        }
+
+        switch (op) {
+        case CTDP_CMD_OPERATION_START:
+#ifdef CONFIG_THERMAL
+                mvm->cooling_dev.cur_state = budget;
+#endif /* CONFIG_THERMAL */
+                break;
+        case CTDP_CMD_OPERATION_REPORT:
+                IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
+                /* when the function is called with CTDP_CMD_OPERATION_REPORT
+                 * option the function should return the average budget value
+                 * that is received from the FW.
+                 * The budget can't be less or equal to 0, so it's possible
+                 * to distinguish between error values and budgets.
+                 */
+                return status;
+        case CTDP_CMD_OPERATION_STOP:
+                IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
+                break;
+        }
+
+        return 0;
+}
+
 #ifdef CONFIG_THERMAL
 static int compare_temps(const void *a, const void *b)
 {
@@ -738,40 +782,6 @@ static const u32 iwl_mvm_cdev_budgets[] = {
         150,    /* cooling state 19 */
 };
 
-int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 budget)
-{
-        struct iwl_mvm_ctdp_cmd cmd = {
-                .operation = cpu_to_le32(op),
-                .budget = cpu_to_le32(budget),
-                .window_size = 0,
-        };
-        int ret;
-        u32 status;
-
-        lockdep_assert_held(&mvm->mutex);
-
-        ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
-                                                       CTDP_CONFIG_CMD),
-                                          sizeof(cmd), &cmd, &status);
-
-        if (ret) {
-                IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
-                return ret;
-        }
-
-        /* can happen if the registration failed */
-        if (!mvm->cooling_dev.cdev)
-                return -EINVAL;
-
-        if (op == CTDP_CMD_OPERATION_START)
-                mvm->cooling_dev.cur_state = budget;
-
-        else if (op == CTDP_CMD_OPERATION_REPORT)
-                IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
-
-        return 0;
-}
-
 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
                                        unsigned long *state)
 {