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mei: debugfs: add pxp mode to devstate in debugfs

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Add pxp mode devstate to debugfs to monitor pxp state machine progress.
This is useful to debug issues in scenarios in which the pxp state
needs to be re-initialized, like during power transitions such as
suspend/resume. With this debugfs the state could be monitored
to ensure that pxp is in the ready state.

CC: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-15-tomas.winkler@intel.com
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Tomas Winkler 2022-09-08 00:51:11 +03:00 committed by Joonas Lahtinen
parent 267cb87001
commit 57e4f15506
1 changed files with 18 additions and 1 deletions
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19
drivers/misc/mei/debugfs.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2012-2016, Intel Corporation. All rights reserved
* Copyright (c) 2012-2022, Intel Corporation. All rights reserved
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@ -86,6 +86,20 @@ out:
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);
static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state)
{
#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state
switch (state) {
MEI_PXP_MODE(DEFAULT);
MEI_PXP_MODE(INIT);
MEI_PXP_MODE(SETUP);
MEI_PXP_MODE(READY);
default:
return "unknown";
}
#undef MEI_PXP_MODE
}
static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
{
struct mei_device *dev = m->private;
@ -112,6 +126,9 @@ static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
seq_printf(m, "pg: %s, %s\n",
mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
mei_pg_state_str(mei_pg_state(dev)));
seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode));
return 0;
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);