iwlwifi: mvm: add d0i3_refs debugfs file

Add d0i3_refs debugfs file that prints the currently taken
mvm D0i3 refs.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c
index 6ddc188..2253d5b 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c
@@ -838,6 +838,34 @@ static ssize_t iwl_dbgfs_d3_sram_read(struct file *file, char __user *user_buf,
 }
 #endif
 
+#define PRINT_MVM_REF(ref) do {                                        \
+       if (test_bit(ref, mvm->ref_bitmap))                     \
+               pos += scnprintf(buf + pos, bufsz - pos,        \
+                                "\t(0x%lx) %s\n",              \
+                                BIT(ref), #ref);               \
+} while (0)
+
+static ssize_t iwl_dbgfs_d0i3_refs_read(struct file *file,
+                                       char __user *user_buf,
+                                       size_t count, loff_t *ppos)
+{
+       struct iwl_mvm *mvm = file->private_data;
+       int pos = 0;
+       char buf[256];
+       const size_t bufsz = sizeof(buf);
+
+       pos += scnprintf(buf + pos, bufsz - pos, "taken mvm refs: 0x%lx\n",
+                        mvm->ref_bitmap[0]);
+
+       PRINT_MVM_REF(IWL_MVM_REF_UCODE_DOWN);
+       PRINT_MVM_REF(IWL_MVM_REF_SCAN);
+       PRINT_MVM_REF(IWL_MVM_REF_ROC);
+       PRINT_MVM_REF(IWL_MVM_REF_P2P_CLIENT);
+       PRINT_MVM_REF(IWL_MVM_REF_AP_IBSS);
+
+       return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+}
+
 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
        _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_mvm)
 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
@@ -862,6 +890,7 @@ MVM_DEBUGFS_READ_FILE_OPS(fw_rx_stats);
 MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart, 10);
 MVM_DEBUGFS_WRITE_FILE_OPS(fw_nmi, 10);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(scan_ant_rxchain, 8);
+MVM_DEBUGFS_READ_FILE_OPS(d0i3_refs);
 
 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bcast_filters, 256);
@@ -893,6 +922,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
        MVM_DEBUGFS_ADD_FILE(fw_nmi, mvm->debugfs_dir, S_IWUSR);
        MVM_DEBUGFS_ADD_FILE(scan_ant_rxchain, mvm->debugfs_dir,
                             S_IWUSR | S_IRUSR);
+       MVM_DEBUGFS_ADD_FILE(d0i3_refs, mvm->debugfs_dir, S_IRUSR);
 
 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
        if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING) {