From 57e4f15506262dbd431c5f72ebd5b21ebb426119 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 8 Sep 2022 00:51:11 +0300 Subject: [PATCH] mei: debugfs: add pxp mode to devstate in debugfs 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 Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Reviewed-by: Daniele Ceraolo Spurio Signed-off-by: Daniele Ceraolo Spurio Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-15-tomas.winkler@intel.com Acked-by: Greg Kroah-Hartman Signed-off-by: Joonas Lahtinen --- drivers/misc/mei/debugfs.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index 1ce61e9e24fc..3b098d4c8e3d 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -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); -- 2.39.5