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brintos / linux-shallow public Read only

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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright (C) 2012-2014, 2018-2023 Intel Corporation4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH5 * Copyright (C) 2016-2017 Intel Deutschland GmbH6 */7#include "api/commands.h"8#include "debugfs.h"9#include "dbg.h"10#include <linux/seq_file.h>11 12#define FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype)		\13struct dbgfs_##name##_data {						\14	argtype *arg;							\15	bool read_done;							\16	ssize_t rlen;							\17	char rbuf[buflen];						\18};									\19static int _iwl_dbgfs_##name##_open(struct inode *inode,		\20				    struct file *file)			\21{									\22	struct dbgfs_##name##_data *data;				\23									\24	data = kzalloc(sizeof(*data), GFP_KERNEL);			\25	if (!data)							\26		return -ENOMEM;						\27									\28	data->read_done = false;					\29	data->arg = inode->i_private;					\30	file->private_data = data;					\31									\32	return 0;							\33}34 35#define FWRT_DEBUGFS_READ_WRAPPER(name)					\36static ssize_t _iwl_dbgfs_##name##_read(struct file *file,		\37					char __user *user_buf,		\38					size_t count, loff_t *ppos)	\39{									\40	struct dbgfs_##name##_data *data = file->private_data;		\41									\42	if (!data->read_done) {						\43		data->read_done = true;					\44		data->rlen = iwl_dbgfs_##name##_read(data->arg,		\45						     sizeof(data->rbuf),\46						     data->rbuf);	\47	}								\48									\49	if (data->rlen < 0)						\50		return data->rlen;					\51	return simple_read_from_buffer(user_buf, count, ppos,		\52				       data->rbuf, data->rlen);		\53}54 55static int _iwl_dbgfs_release(struct inode *inode, struct file *file)56{57	kfree(file->private_data);58 59	return 0;60}61 62#define _FWRT_DEBUGFS_READ_FILE_OPS(name, buflen, argtype)		\63FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype)			\64FWRT_DEBUGFS_READ_WRAPPER(name)						\65static const struct file_operations iwl_dbgfs_##name##_ops = {		\66	.read = _iwl_dbgfs_##name##_read,				\67	.open = _iwl_dbgfs_##name##_open,				\68	.llseek = generic_file_llseek,					\69	.release = _iwl_dbgfs_release,					\70}71 72#define FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype)		\73static ssize_t _iwl_dbgfs_##name##_write(struct file *file,		\74					 const char __user *user_buf,	\75					 size_t count, loff_t *ppos)	\76{									\77	argtype *arg =							\78		((struct dbgfs_##name##_data *)file->private_data)->arg;\79	char buf[buflen] = {};						\80	size_t buf_size = min(count, sizeof(buf) -  1);			\81									\82	if (copy_from_user(buf, user_buf, buf_size))			\83		return -EFAULT;						\84									\85	return iwl_dbgfs_##name##_write(arg, buf, buf_size);		\86}87 88#define _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, buflen, argtype)	\89FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype)			\90FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype)			\91FWRT_DEBUGFS_READ_WRAPPER(name)						\92static const struct file_operations iwl_dbgfs_##name##_ops = {		\93	.write = _iwl_dbgfs_##name##_write,				\94	.read = _iwl_dbgfs_##name##_read,				\95	.open = _iwl_dbgfs_##name##_open,				\96	.llseek = generic_file_llseek,					\97	.release = _iwl_dbgfs_release,					\98}99 100#define _FWRT_DEBUGFS_WRITE_FILE_OPS(name, buflen, argtype)		\101FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype)			\102FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype)			\103static const struct file_operations iwl_dbgfs_##name##_ops = {		\104	.write = _iwl_dbgfs_##name##_write,				\105	.open = _iwl_dbgfs_##name##_open,				\106	.llseek = generic_file_llseek,					\107	.release = _iwl_dbgfs_release,					\108}109 110#define FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz)				\111	_FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz, struct iwl_fw_runtime)112 113#define FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz)			\114	_FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime)115 116#define FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz)			\117	_FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime)118 119#define FWRT_DEBUGFS_ADD_FILE_ALIAS(alias, name, parent, mode) do {	\120	debugfs_create_file(alias, mode, parent, fwrt,			\121			    &iwl_dbgfs_##name##_ops);			\122	} while (0)123#define FWRT_DEBUGFS_ADD_FILE(name, parent, mode) \124	FWRT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)125 126static int iwl_dbgfs_enabled_severities_write(struct iwl_fw_runtime *fwrt,127					      char *buf, size_t count)128{129	struct iwl_dbg_host_event_cfg_cmd event_cfg;130	struct iwl_host_cmd hcmd = {131		.id = WIDE_ID(DEBUG_GROUP, HOST_EVENT_CFG),132		.flags = CMD_ASYNC,133		.data[0] = &event_cfg,134		.len[0] = sizeof(event_cfg),135	};136	u32 enabled_severities;137	int ret = kstrtou32(buf, 10, &enabled_severities);138 139	if (ret < 0)140		return ret;141 142	event_cfg.enabled_severities = cpu_to_le32(enabled_severities);143 144	if (fwrt->ops && fwrt->ops->send_hcmd)145		ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd);146	else147		ret = -EPERM;148 149	IWL_INFO(fwrt,150		 "sent host event cfg with enabled_severities: %u, ret: %d\n",151		 enabled_severities, ret);152 153	return ret ?: count;154}155 156FWRT_DEBUGFS_WRITE_FILE_OPS(enabled_severities, 16);157 158static void iwl_fw_timestamp_marker_wk(struct work_struct *work)159{160	int ret;161	struct iwl_fw_runtime *fwrt =162		container_of(work, struct iwl_fw_runtime, timestamp.wk.work);163	unsigned long delay = fwrt->timestamp.delay;164 165	ret = iwl_fw_send_timestamp_marker_cmd(fwrt);166	if (!ret && delay)167		schedule_delayed_work(&fwrt->timestamp.wk,168				      round_jiffies_relative(delay));169	else170		IWL_INFO(fwrt,171			 "stopping timestamp_marker, ret: %d, delay: %u\n",172			 ret, jiffies_to_msecs(delay) / 1000);173}174 175void iwl_fw_trigger_timestamp(struct iwl_fw_runtime *fwrt, u32 delay)176{177	IWL_INFO(fwrt,178		 "starting timestamp_marker trigger with delay: %us\n",179		 delay);180 181	iwl_fw_cancel_timestamp(fwrt);182 183	fwrt->timestamp.delay = msecs_to_jiffies(delay * 1000);184 185	schedule_delayed_work(&fwrt->timestamp.wk,186			      round_jiffies_relative(fwrt->timestamp.delay));187}188 189static ssize_t iwl_dbgfs_timestamp_marker_write(struct iwl_fw_runtime *fwrt,190						char *buf, size_t count)191{192	int ret;193	u32 delay;194 195	ret = kstrtou32(buf, 10, &delay);196	if (ret < 0)197		return ret;198 199	iwl_fw_trigger_timestamp(fwrt, delay);200 201	return count;202}203 204static ssize_t iwl_dbgfs_timestamp_marker_read(struct iwl_fw_runtime *fwrt,205					       size_t size, char *buf)206{207	u32 delay_secs = jiffies_to_msecs(fwrt->timestamp.delay) / 1000;208 209	return scnprintf(buf, size, "%d\n", delay_secs);210}211 212FWRT_DEBUGFS_READ_WRITE_FILE_OPS(timestamp_marker, 16);213 214struct hcmd_write_data {215	__be32 cmd_id;216	__be32 flags;217	__be16 length;218	u8 data[];219} __packed;220 221static ssize_t iwl_dbgfs_send_hcmd_write(struct iwl_fw_runtime *fwrt, char *buf,222					 size_t count)223{224	size_t header_size = (sizeof(u32) * 2 + sizeof(u16)) * 2;225	size_t data_size = (count - 1) / 2;226	int ret;227	struct hcmd_write_data *data;228	struct iwl_host_cmd hcmd = {229		.len = { 0, },230		.data = { NULL, },231	};232 233	if (!iwl_trans_fw_running(fwrt->trans))234		return -EIO;235 236	if (count < header_size + 1 || count > 1024 * 4)237		return -EINVAL;238 239	data = kmalloc(data_size, GFP_KERNEL);240	if (!data)241		return -ENOMEM;242 243	ret = hex2bin((u8 *)data, buf, data_size);244	if (ret)245		goto out;246 247	hcmd.id = be32_to_cpu(data->cmd_id);248	hcmd.flags = be32_to_cpu(data->flags);249	hcmd.len[0] = be16_to_cpu(data->length);250	hcmd.data[0] = data->data;251 252	if (count != header_size + hcmd.len[0] * 2 + 1) {253		IWL_ERR(fwrt,254			"host command data size does not match header length\n");255		ret = -EINVAL;256		goto out;257	}258 259	if (fwrt->ops && fwrt->ops->send_hcmd)260		ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd);261	else262		ret = -EPERM;263 264	if (ret < 0)265		goto out;266 267	if (hcmd.flags & CMD_WANT_SKB)268		iwl_free_resp(&hcmd);269out:270	kfree(data);271	return ret ?: count;272}273 274FWRT_DEBUGFS_WRITE_FILE_OPS(send_hcmd, 512);275 276static ssize_t iwl_dbgfs_fw_dbg_domain_read(struct iwl_fw_runtime *fwrt,277					    size_t size, char *buf)278{279	return scnprintf(buf, size, "0x%08x\n",280			 fwrt->trans->dbg.domains_bitmap);281}282 283FWRT_DEBUGFS_READ_FILE_OPS(fw_dbg_domain, 20);284 285struct iwl_dbgfs_fw_info_priv {286	struct iwl_fw_runtime *fwrt;287};288 289struct iwl_dbgfs_fw_info_state {290	loff_t pos;291};292 293static void *iwl_dbgfs_fw_info_seq_next(struct seq_file *seq,294					void *v, loff_t *pos)295{296	struct iwl_dbgfs_fw_info_state *state = v;297	struct iwl_dbgfs_fw_info_priv *priv = seq->private;298	const struct iwl_fw *fw = priv->fwrt->fw;299 300	*pos = ++state->pos;301	if (*pos >= fw->ucode_capa.n_cmd_versions) {302		kfree(state);303		return NULL;304	}305 306	return state;307}308 309static void iwl_dbgfs_fw_info_seq_stop(struct seq_file *seq,310				       void *v)311{312	kfree(v);313}314 315static void *iwl_dbgfs_fw_info_seq_start(struct seq_file *seq, loff_t *pos)316{317	struct iwl_dbgfs_fw_info_priv *priv = seq->private;318	const struct iwl_fw *fw = priv->fwrt->fw;319	struct iwl_dbgfs_fw_info_state *state;320 321	if (*pos >= fw->ucode_capa.n_cmd_versions)322		return NULL;323 324	state = kzalloc(sizeof(*state), GFP_KERNEL);325	if (!state)326		return NULL;327	state->pos = *pos;328	return state;329};330 331static int iwl_dbgfs_fw_info_seq_show(struct seq_file *seq, void *v)332{333	struct iwl_dbgfs_fw_info_state *state = v;334	struct iwl_dbgfs_fw_info_priv *priv = seq->private;335	const struct iwl_fw *fw = priv->fwrt->fw;336	const struct iwl_fw_cmd_version *ver;337	u32 cmd_id;338	int has_capa;339 340	if (!state->pos) {341		seq_puts(seq, "fw_capa:\n");342		has_capa = fw_has_capa(&fw->ucode_capa,343				       IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT) ? 1 : 0;344		seq_printf(seq,345			   "    %d: %d\n",346			   IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT,347			   has_capa);348		has_capa = fw_has_capa(&fw->ucode_capa,349				       IWL_UCODE_TLV_CAPA_CHINA_22_REG_SUPPORT) ? 1 : 0;350		seq_printf(seq,351			   "    %d: %d\n",352			   IWL_UCODE_TLV_CAPA_CHINA_22_REG_SUPPORT,353			   has_capa);354		seq_puts(seq, "fw_api_ver:\n");355	}356 357	ver = &fw->ucode_capa.cmd_versions[state->pos];358 359	cmd_id = WIDE_ID(ver->group, ver->cmd);360 361	seq_printf(seq, "  0x%04x:\n", cmd_id);362	seq_printf(seq, "    name: %s\n",363		   iwl_get_cmd_string(priv->fwrt->trans, cmd_id));364	seq_printf(seq, "    cmd_ver: %d\n", ver->cmd_ver);365	seq_printf(seq, "    notif_ver: %d\n", ver->notif_ver);366	return 0;367}368 369static const struct seq_operations iwl_dbgfs_info_seq_ops = {370	.start = iwl_dbgfs_fw_info_seq_start,371	.next = iwl_dbgfs_fw_info_seq_next,372	.stop = iwl_dbgfs_fw_info_seq_stop,373	.show = iwl_dbgfs_fw_info_seq_show,374};375 376static int iwl_dbgfs_fw_info_open(struct inode *inode, struct file *filp)377{378	struct iwl_dbgfs_fw_info_priv *priv;379 380	priv = __seq_open_private(filp, &iwl_dbgfs_info_seq_ops,381				  sizeof(*priv));382 383	if (!priv)384		return -ENOMEM;385 386	priv->fwrt = inode->i_private;387	return 0;388}389 390static const struct file_operations iwl_dbgfs_fw_info_ops = {391	.owner = THIS_MODULE,392	.open = iwl_dbgfs_fw_info_open,393	.read = seq_read,394	.llseek = seq_lseek,395	.release = seq_release_private,396};397 398void iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt,399			    struct dentry *dbgfs_dir)400{401	INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk);402	FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, 0200);403	FWRT_DEBUGFS_ADD_FILE(fw_info, dbgfs_dir, 0200);404	FWRT_DEBUGFS_ADD_FILE(send_hcmd, dbgfs_dir, 0200);405	FWRT_DEBUGFS_ADD_FILE(enabled_severities, dbgfs_dir, 0200);406	FWRT_DEBUGFS_ADD_FILE(fw_dbg_domain, dbgfs_dir, 0400);407}408