196 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2012-2022, Intel Corporation. All rights reserved4 * Intel Management Engine Interface (Intel MEI) Linux driver5 */6 7#include <linux/slab.h>8#include <linux/kernel.h>9#include <linux/device.h>10#include <linux/debugfs.h>11#include <linux/seq_file.h>12 13#include <linux/mei.h>14 15#include "mei_dev.h"16#include "client.h"17#include "hw.h"18 19static int mei_dbgfs_meclients_show(struct seq_file *m, void *unused)20{21 struct mei_device *dev = m->private;22 struct mei_me_client *me_cl;23 int i = 0;24 25 if (!dev)26 return -ENODEV;27 28 down_read(&dev->me_clients_rwsem);29 30 seq_puts(m, " |id|fix| UUID |con|msg len|sb|refc|vt|\n");31 32 /* if the driver is not enabled the list won't be consistent */33 if (dev->dev_state != MEI_DEV_ENABLED)34 goto out;35 36 list_for_each_entry(me_cl, &dev->me_clients, list) {37 if (!mei_me_cl_get(me_cl))38 continue;39 40 seq_printf(m, "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|%2d|\n",41 i++, me_cl->client_id,42 me_cl->props.fixed_address,43 &me_cl->props.protocol_name,44 me_cl->props.max_number_of_connections,45 me_cl->props.max_msg_length,46 me_cl->props.single_recv_buf,47 kref_read(&me_cl->refcnt),48 me_cl->props.vt_supported);49 mei_me_cl_put(me_cl);50 }51 52out:53 up_read(&dev->me_clients_rwsem);54 return 0;55}56DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_meclients);57 58static int mei_dbgfs_active_show(struct seq_file *m, void *unused)59{60 struct mei_device *dev = m->private;61 struct mei_cl *cl;62 int i = 0;63 64 if (!dev)65 return -ENODEV;66 67 mutex_lock(&dev->device_lock);68 69 seq_puts(m, " |me|host|state|rd|wr|wrq\n");70 71 /* if the driver is not enabled the list won't be consistent */72 if (dev->dev_state != MEI_DEV_ENABLED)73 goto out;74 75 list_for_each_entry(cl, &dev->file_list, link) {76 77 seq_printf(m, "%3d|%2d|%4d|%5d|%2d|%2d|%3u\n",78 i, mei_cl_me_id(cl), cl->host_client_id, cl->state,79 !list_empty(&cl->rd_completed), cl->writing_state,80 cl->tx_cb_queued);81 i++;82 }83out:84 mutex_unlock(&dev->device_lock);85 return 0;86}87DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);88 89static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state)90{91#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state92 switch (state) {93 MEI_PXP_MODE(DEFAULT);94 MEI_PXP_MODE(INIT);95 MEI_PXP_MODE(SETUP);96 MEI_PXP_MODE(READY);97 default:98 return "unknown";99 }100#undef MEI_PXP_MODE101}102 103static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)104{105 struct mei_device *dev = m->private;106 107 seq_printf(m, "dev: %s\n", mei_dev_state_str(dev->dev_state));108 seq_printf(m, "hbm: %s\n", mei_hbm_state_str(dev->hbm_state));109 110 if (dev->hbm_state >= MEI_HBM_ENUM_CLIENTS &&111 dev->hbm_state <= MEI_HBM_STARTED) {112 seq_puts(m, "hbm features:\n");113 seq_printf(m, "\tPG: %01d\n", dev->hbm_f_pg_supported);114 seq_printf(m, "\tDC: %01d\n", dev->hbm_f_dc_supported);115 seq_printf(m, "\tIE: %01d\n", dev->hbm_f_ie_supported);116 seq_printf(m, "\tDOT: %01d\n", dev->hbm_f_dot_supported);117 seq_printf(m, "\tEV: %01d\n", dev->hbm_f_ev_supported);118 seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported);119 seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported);120 seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported);121 seq_printf(m, "\tVT: %01d\n", dev->hbm_f_vt_supported);122 seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported);123 seq_printf(m, "\tCD: %01d\n", dev->hbm_f_cd_supported);124 }125 126 seq_printf(m, "pg: %s, %s\n",127 mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",128 mei_pg_state_str(mei_pg_state(dev)));129 130 seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode));131 132 return 0;133}134DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);135 136static ssize_t mei_dbgfs_write_allow_fa(struct file *file,137 const char __user *user_buf,138 size_t count, loff_t *ppos)139{140 struct mei_device *dev;141 int ret;142 143 dev = container_of(file->private_data,144 struct mei_device, allow_fixed_address);145 146 ret = debugfs_write_file_bool(file, user_buf, count, ppos);147 if (ret < 0)148 return ret;149 dev->override_fixed_address = true;150 return ret;151}152 153static const struct file_operations mei_dbgfs_allow_fa_fops = {154 .open = simple_open,155 .read = debugfs_read_file_bool,156 .write = mei_dbgfs_write_allow_fa,157 .llseek = generic_file_llseek,158};159 160/**161 * mei_dbgfs_deregister - Remove the debugfs files and directories162 *163 * @dev: the mei device structure164 */165void mei_dbgfs_deregister(struct mei_device *dev)166{167 if (!dev->dbgfs_dir)168 return;169 debugfs_remove_recursive(dev->dbgfs_dir);170 dev->dbgfs_dir = NULL;171}172 173/**174 * mei_dbgfs_register - Add the debugfs files175 *176 * @dev: the mei device structure177 * @name: the mei device name178 */179void mei_dbgfs_register(struct mei_device *dev, const char *name)180{181 struct dentry *dir;182 183 dir = debugfs_create_dir(name, NULL);184 dev->dbgfs_dir = dir;185 186 debugfs_create_file("meclients", S_IRUSR, dir, dev,187 &mei_dbgfs_meclients_fops);188 debugfs_create_file("active", S_IRUSR, dir, dev,189 &mei_dbgfs_active_fops);190 debugfs_create_file("devstate", S_IRUSR, dir, dev,191 &mei_dbgfs_devstate_fops);192 debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,193 &dev->allow_fixed_address,194 &mei_dbgfs_allow_fa_fops);195}196