net: wwan: iosm: move debugfs knobs into a subdir

The modem traces collection is a device (and so driver) specific option.
Therefore, move the related debugfs files into a driver-specific
subdirectory under the common per WWAN device directory.

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Acked-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/wwan/iosm/Makefile b/drivers/net/wwan/iosm/Makefile
index 5c2528b..5091f66 100644 (file)
--- a/drivers/net/wwan/iosm/Makefile
+++ b/drivers/net/wwan/iosm/Makefile
@@ -22,6 +22,7 @@ iosm-y = \
        iosm_ipc_devlink.o              \
        iosm_ipc_flash.o                \
        iosm_ipc_coredump.o             \
+       iosm_ipc_debugfs.o              \
        iosm_ipc_trace.o
 
 obj-$(CONFIG_IOSM) := iosm.o

diff --git a/drivers/net/wwan/iosm/iosm_ipc_debugfs.c b/drivers/net/wwan/iosm/iosm_ipc_debugfs.c
new file mode 100644 (file)
index 0000000..f2f5775
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_debugfs.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/wwan.h>
+
+#include "iosm_ipc_imem.h"
+#include "iosm_ipc_trace.h"
+#include "iosm_ipc_debugfs.h"
+
+void ipc_debugfs_init(struct iosm_imem *ipc_imem)
+{
+       struct dentry *debugfs_pdev = wwan_get_debugfs_dir(ipc_imem->dev);
+
+       ipc_imem->debugfs_dir = debugfs_create_dir(KBUILD_MODNAME,
+                                                  debugfs_pdev);
+
+       ipc_imem->trace = ipc_trace_init(ipc_imem);
+       if (!ipc_imem->trace)
+               dev_warn(ipc_imem->dev, "trace channel init failed");
+}
+
+void ipc_debugfs_deinit(struct iosm_imem *ipc_imem)
+{
+       ipc_trace_deinit(ipc_imem->trace);
+       debugfs_remove_recursive(ipc_imem->debugfs_dir);
+}

diff --git a/drivers/net/wwan/iosm/iosm_ipc_debugfs.h b/drivers/net/wwan/iosm/iosm_ipc_debugfs.h
new file mode 100644 (file)
index 0000000..3578803
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_debugfs.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#ifndef IOSM_IPC_DEBUGFS_H
+#define IOSM_IPC_DEBUGFS_H
+
+void ipc_debugfs_init(struct iosm_imem *ipc_imem);
+void ipc_debugfs_deinit(struct iosm_imem *ipc_imem);
+
+#endif

diff --git a/drivers/net/wwan/iosm/iosm_ipc_imem.c b/drivers/net/wwan/iosm/iosm_ipc_imem.c
index a60b93c..25b8899 100644 (file)
--- a/drivers/net/wwan/iosm/iosm_ipc_imem.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_imem.c
@@ -11,6 +11,7 @@
 #include "iosm_ipc_imem.h"
 #include "iosm_ipc_port.h"
 #include "iosm_ipc_trace.h"
+#include "iosm_ipc_debugfs.h"
 
 /* Check the wwan ips if it is valid with Channel as input. */
 static int ipc_imem_check_wwan_ips(struct ipc_mem_channel *chnl)
@@ -554,9 +555,7 @@ static void ipc_imem_run_state_worker(struct work_struct *instance)
                ctrl_chl_idx++;
        }
 
-       ipc_imem->trace = ipc_trace_init(ipc_imem);
-       if (!ipc_imem->trace)
-               dev_warn(ipc_imem->dev, "trace channel init failed");
+       ipc_debugfs_init(ipc_imem);
 
        ipc_task_queue_send_task(ipc_imem, ipc_imem_send_mdm_rdy_cb, 0, NULL, 0,
                                 false);
@@ -1173,7 +1172,7 @@ void ipc_imem_cleanup(struct iosm_imem *ipc_imem)
 
        if (test_and_clear_bit(FULLY_FUNCTIONAL, &ipc_imem->flag)) {
                ipc_mux_deinit(ipc_imem->mux);
-               ipc_trace_deinit(ipc_imem->trace);
+               ipc_debugfs_deinit(ipc_imem);
                ipc_wwan_deinit(ipc_imem->wwan);
                ipc_port_deinit(ipc_imem->ipc_port);
        }

diff --git a/drivers/net/wwan/iosm/iosm_ipc_imem.h b/drivers/net/wwan/iosm/iosm_ipc_imem.h
index cec3800..1b8c7b8 100644 (file)
--- a/drivers/net/wwan/iosm/iosm_ipc_imem.h
+++ b/drivers/net/wwan/iosm/iosm_ipc_imem.h
@@ -341,6 +341,7 @@ enum ipc_phase {
  * @ev_mux_net_transmit_pending:0 means inform the IPC tasklet to pass
  * @reset_det_n:               Reset detect flag
  * @pcie_wake_n:               Pcie wake flag
+ * @debugfs_dir:               Debug FS directory for driver-specific entries
  */
 struct iosm_imem {
        struct iosm_mmio *mmio;
@@ -380,6 +381,7 @@ struct iosm_imem {
           ev_mux_net_transmit_pending:1,
           reset_det_n:1,
           pcie_wake_n:1;
+       struct dentry *debugfs_dir;
 };
 
 /**

diff --git a/drivers/net/wwan/iosm/iosm_ipc_trace.c b/drivers/net/wwan/iosm/iosm_ipc_trace.c
index c588a39..5243ead 100644 (file)
--- a/drivers/net/wwan/iosm/iosm_ipc_trace.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_trace.c
@@ -134,7 +134,6 @@ struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem)
 {
        struct ipc_chnl_cfg chnl_cfg = { 0 };
        struct iosm_trace *ipc_trace;
-       struct dentry *debugfs_pdev;
 
        ipc_chnl_cfg_get(&chnl_cfg, IPC_MEM_CTRL_CHL_ID_3);
        ipc_imem_channel_init(ipc_imem, IPC_CTYPE_CTRL, chnl_cfg,
@@ -150,15 +149,14 @@ struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem)
        ipc_trace->chl_id = IPC_MEM_CTRL_CHL_ID_3;
 
        mutex_init(&ipc_trace->trc_mutex);
-       debugfs_pdev = wwan_get_debugfs_dir(ipc_imem->dev);
 
        ipc_trace->ctrl_file = debugfs_create_file(IOSM_TRC_DEBUGFS_TRACE_CTRL,
                                                   IOSM_TRC_FILE_PERM,
-                                                  debugfs_pdev,
+                                                  ipc_imem->debugfs_dir,
                                                   ipc_trace, &ipc_trace_fops);
 
        ipc_trace->ipc_rchan = relay_open(IOSM_TRC_DEBUGFS_TRACE,
-                                         debugfs_pdev,
+                                         ipc_imem->debugfs_dir,
                                          IOSM_TRC_SUB_BUFF_SIZE,
                                          IOSM_TRC_N_SUB_BUFF,
                                          &relay_callbacks, NULL);