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![Tomas Winkler](/assets/img/avatar_default.png)
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>
195 lines
5.1 KiB
C
195 lines
5.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2012-2022, Intel Corporation. All rights reserved
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* Intel Management Engine Interface (Intel MEI) Linux driver
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*/
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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#include "client.h"
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#include "hw.h"
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static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused)
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{
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struct mei_device *dev = m->private;
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struct mei_me_client *me_cl;
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int i = 0;
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if (!dev)
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return -ENODEV;
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down_read(&dev->me_clients_rwsem);
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seq_puts(m, " |id|fix| UUID |con|msg len|sb|refc|vt|\n");
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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goto out;
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list_for_each_entry(me_cl, &dev->me_clients, list) {
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if (!mei_me_cl_get(me_cl))
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continue;
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seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|%2d|\n",
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i++, me_cl->client_id,
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me_cl->props.fixed_address,
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&me_cl->props.protocol_name,
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me_cl->props.max_number_of_connections,
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me_cl->props.max_msg_length,
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me_cl->props.single_recv_buf,
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kref_read(&me_cl->refcnt),
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me_cl->props.vt_supported);
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mei_me_cl_put(me_cl);
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}
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out:
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up_read(&dev->me_clients_rwsem);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients);
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static int mei_dbgfs_active_show(struct seq_file *m, void *unused)
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{
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struct mei_device *dev = m->private;
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struct mei_cl *cl;
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int i = 0;
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if (!dev)
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return -ENODEV;
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mutex_lock(&dev->device_lock);
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seq_puts(m, " |me|host|state|rd|wr|wrq\n");
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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goto out;
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list_for_each_entry(cl, &dev->file_list, link) {
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seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",
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i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
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!list_empty(&cl->rd_completed), cl->writing_state,
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cl->tx_cb_queued);
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i++;
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}
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out:
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mutex_unlock(&dev->device_lock);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);
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static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state)
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{
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#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state
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switch (state) {
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MEI_PXP_MODE(DEFAULT);
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MEI_PXP_MODE(INIT);
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MEI_PXP_MODE(SETUP);
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MEI_PXP_MODE(READY);
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default:
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return "unknown";
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}
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#undef MEI_PXP_MODE
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}
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static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
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{
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struct mei_device *dev = m->private;
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seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state));
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seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state));
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if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&
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dev->hbm_state <= MEI_HBM_STARTED) {
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seq_puts(m, "hbm features:\n");
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seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported);
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seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported);
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seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported);
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seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported);
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seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported);
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seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported);
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seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported);
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seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported);
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seq_printf(m, "\tVT: %01d\n", dev->hbm_f_vt_supported);
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seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported);
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seq_printf(m, "\tCD: %01d\n", dev->hbm_f_cd_supported);
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}
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seq_printf(m, "pg: %s, %s\n",
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mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
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mei_pg_state_str(mei_pg_state(dev)));
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seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode));
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);
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static ssize_t mei_dbgfs_write_allow_fa(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct mei_device *dev;
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int ret;
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dev = container_of(file->private_data,
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struct mei_device, allow_fixed_address);
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ret = debugfs_write_file_bool(file, user_buf, count, ppos);
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if (ret < 0)
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return ret;
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dev->override_fixed_address = true;
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return ret;
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}
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static const struct file_operations mei_dbgfs_allow_fa_fops = {
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.open = simple_open,
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.read = debugfs_read_file_bool,
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.write = mei_dbgfs_write_allow_fa,
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.llseek = generic_file_llseek,
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};
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/**
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* mei_dbgfs_deregister - Remove the debugfs files and directories
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*
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* @dev: the mei device structure
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*/
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void mei_dbgfs_deregister(struct mei_device *dev)
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{
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if (!dev->dbgfs_dir)
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return;
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debugfs_remove_recursive(dev->dbgfs_dir);
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dev->dbgfs_dir = NULL;
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}
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/**
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* mei_dbgfs_register - Add the debugfs files
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*
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* @dev: the mei device structure
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* @name: the mei device name
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*/
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void mei_dbgfs_register(struct mei_device *dev, const char *name)
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{
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struct dentry *dir;
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dir = debugfs_create_dir(name, NULL);
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dev->dbgfs_dir = dir;
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debugfs_create_file("meclients", S_IRUSR, dir, dev,
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&mei_dbgfs_meclients_fops);
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debugfs_create_file("active", S_IRUSR, dir, dev,
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&mei_dbgfs_active_fops);
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debugfs_create_file("devstate", S_IRUSR, dir, dev,
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&mei_dbgfs_devstate_fops);
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debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
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&dev->allow_fixed_address,
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&mei_dbgfs_allow_fa_fops);
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}
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