diff options
Diffstat (limited to 'drivers/misc/mei/debugfs.c')
| -rw-r--r-- | drivers/misc/mei/debugfs.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c new file mode 100644 index 0000000000..3b098d4c8e --- /dev/null +++ b/drivers/misc/mei/debugfs.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2012-2022, Intel Corporation. All rights reserved + * Intel Management Engine Interface (Intel MEI) Linux driver + */ + +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +#include <linux/mei.h> + +#include "mei_dev.h" +#include "client.h" +#include "hw.h" + +static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused) +{ + struct mei_device *dev = m->private; + struct mei_me_client *me_cl; + int i = 0; + + if (!dev) + return -ENODEV; + + down_read(&dev->me_clients_rwsem); + + seq_puts(m, " |id|fix| UUID |con|msg len|sb|refc|vt|\n"); + + /* if the driver is not enabled the list won't be consistent */ + if (dev->dev_state != MEI_DEV_ENABLED) + goto out; + + list_for_each_entry(me_cl, &dev->me_clients, list) { + if (!mei_me_cl_get(me_cl)) + continue; + + seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|%2d|\n", + i++, me_cl->client_id, + me_cl->props.fixed_address, + &me_cl->props.protocol_name, + me_cl->props.max_number_of_connections, + me_cl->props.max_msg_length, + me_cl->props.single_recv_buf, + kref_read(&me_cl->refcnt), + me_cl->props.vt_supported); + mei_me_cl_put(me_cl); + } + +out: + up_read(&dev->me_clients_rwsem); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients); + +static int mei_dbgfs_active_show(struct seq_file *m, void *unused) +{ + struct mei_device *dev = m->private; + struct mei_cl *cl; + int i = 0; + + if (!dev) + return -ENODEV; + + mutex_lock(&dev->device_lock); + + seq_puts(m, " |me|host|state|rd|wr|wrq\n"); + + /* if the driver is not enabled the list won't be consistent */ + if (dev->dev_state != MEI_DEV_ENABLED) + goto out; + + list_for_each_entry(cl, &dev->file_list, link) { + + seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n", + i, mei_cl_me_id(cl), cl->host_client_id, cl->state, + !list_empty(&cl->rd_completed), cl->writing_state, + cl->tx_cb_queued); + i++; + } +out: + mutex_unlock(&dev->device_lock); + return 0; +} +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; + + seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state)); + seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state)); + + if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS && + dev->hbm_state <= MEI_HBM_STARTED) { + seq_puts(m, "hbm features:\n"); + seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported); + seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported); + seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported); + seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported); + seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported); + seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported); + seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported); + seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported); + seq_printf(m, "\tVT: %01d\n", dev->hbm_f_vt_supported); + seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported); + seq_printf(m, "\tCD: %01d\n", dev->hbm_f_cd_supported); + } + + 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); + +static ssize_t mei_dbgfs_write_allow_fa(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct mei_device *dev; + int ret; + + dev = container_of(file->private_data, + struct mei_device, allow_fixed_address); + + ret = debugfs_write_file_bool(file, user_buf, count, ppos); + if (ret < 0) + return ret; + dev->override_fixed_address = true; + return ret; +} + +static const struct file_operations mei_dbgfs_allow_fa_fops = { + .open = simple_open, + .read = debugfs_read_file_bool, + .write = mei_dbgfs_write_allow_fa, + .llseek = generic_file_llseek, +}; + +/** + * mei_dbgfs_deregister - Remove the debugfs files and directories + * + * @dev: the mei device structure + */ +void mei_dbgfs_deregister(struct mei_device *dev) +{ + if (!dev->dbgfs_dir) + return; + debugfs_remove_recursive(dev->dbgfs_dir); + dev->dbgfs_dir = NULL; +} + +/** + * mei_dbgfs_register - Add the debugfs files + * + * @dev: the mei device structure + * @name: the mei device name + */ +void mei_dbgfs_register(struct mei_device *dev, const char *name) +{ + struct dentry *dir; + + dir = debugfs_create_dir(name, NULL); + dev->dbgfs_dir = dir; + + debugfs_create_file("meclients", S_IRUSR, dir, dev, + &mei_dbgfs_meclients_fops); + debugfs_create_file("active", S_IRUSR, dir, dev, + &mei_dbgfs_active_fops); + debugfs_create_file("devstate", S_IRUSR, dir, dev, + &mei_dbgfs_devstate_fops); + debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir, + &dev->allow_fixed_address, + &mei_dbgfs_allow_fa_fops); +} |