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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196// 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);}