summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/debugfs.c')
-rw-r--r--drivers/net/wireless/intel/iwlwifi/fw/debugfs.c398
1 files changed, 398 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c
new file mode 100644
index 000000000..3cdbc6ac7
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c
@@ -0,0 +1,398 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2012-2014, 2018-2020 Intel Corporation
+ * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
+ * Copyright (C) 2016-2017 Intel Deutschland GmbH
+ */
+#include "api/commands.h"
+#include "debugfs.h"
+#include "dbg.h"
+#include <linux/seq_file.h>
+
+#define FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
+struct dbgfs_##name##_data { \
+ argtype *arg; \
+ bool read_done; \
+ ssize_t rlen; \
+ char rbuf[buflen]; \
+}; \
+static int _iwl_dbgfs_##name##_open(struct inode *inode, \
+ struct file *file) \
+{ \
+ struct dbgfs_##name##_data *data; \
+ \
+ data = kzalloc(sizeof(*data), GFP_KERNEL); \
+ if (!data) \
+ return -ENOMEM; \
+ \
+ data->read_done = false; \
+ data->arg = inode->i_private; \
+ file->private_data = data; \
+ \
+ return 0; \
+}
+
+#define FWRT_DEBUGFS_READ_WRAPPER(name) \
+static ssize_t _iwl_dbgfs_##name##_read(struct file *file, \
+ char __user *user_buf, \
+ size_t count, loff_t *ppos) \
+{ \
+ struct dbgfs_##name##_data *data = file->private_data; \
+ \
+ if (!data->read_done) { \
+ data->read_done = true; \
+ data->rlen = iwl_dbgfs_##name##_read(data->arg, \
+ sizeof(data->rbuf),\
+ data->rbuf); \
+ } \
+ \
+ if (data->rlen < 0) \
+ return data->rlen; \
+ return simple_read_from_buffer(user_buf, count, ppos, \
+ data->rbuf, data->rlen); \
+}
+
+static int _iwl_dbgfs_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+
+ return 0;
+}
+
+#define _FWRT_DEBUGFS_READ_FILE_OPS(name, buflen, argtype) \
+FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
+FWRT_DEBUGFS_READ_WRAPPER(name) \
+static const struct file_operations iwl_dbgfs_##name##_ops = { \
+ .read = _iwl_dbgfs_##name##_read, \
+ .open = _iwl_dbgfs_##name##_open, \
+ .llseek = generic_file_llseek, \
+ .release = _iwl_dbgfs_release, \
+}
+
+#define FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \
+static ssize_t _iwl_dbgfs_##name##_write(struct file *file, \
+ const char __user *user_buf, \
+ size_t count, loff_t *ppos) \
+{ \
+ argtype *arg = \
+ ((struct dbgfs_##name##_data *)file->private_data)->arg;\
+ char buf[buflen] = {}; \
+ size_t buf_size = min(count, sizeof(buf) - 1); \
+ \
+ if (copy_from_user(buf, user_buf, buf_size)) \
+ return -EFAULT; \
+ \
+ return iwl_dbgfs_##name##_write(arg, buf, buf_size); \
+}
+
+#define _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, buflen, argtype) \
+FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
+FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \
+FWRT_DEBUGFS_READ_WRAPPER(name) \
+static const struct file_operations iwl_dbgfs_##name##_ops = { \
+ .write = _iwl_dbgfs_##name##_write, \
+ .read = _iwl_dbgfs_##name##_read, \
+ .open = _iwl_dbgfs_##name##_open, \
+ .llseek = generic_file_llseek, \
+ .release = _iwl_dbgfs_release, \
+}
+
+#define _FWRT_DEBUGFS_WRITE_FILE_OPS(name, buflen, argtype) \
+FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \
+FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \
+static const struct file_operations iwl_dbgfs_##name##_ops = { \
+ .write = _iwl_dbgfs_##name##_write, \
+ .open = _iwl_dbgfs_##name##_open, \
+ .llseek = generic_file_llseek, \
+ .release = _iwl_dbgfs_release, \
+}
+
+#define FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz) \
+ _FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz, struct iwl_fw_runtime)
+
+#define FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
+ _FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime)
+
+#define FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
+ _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime)
+
+#define FWRT_DEBUGFS_ADD_FILE_ALIAS(alias, name, parent, mode) do { \
+ debugfs_create_file(alias, mode, parent, fwrt, \
+ &iwl_dbgfs_##name##_ops); \
+ } while (0)
+#define FWRT_DEBUGFS_ADD_FILE(name, parent, mode) \
+ FWRT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode)
+
+static int iwl_dbgfs_enabled_severities_write(struct iwl_fw_runtime *fwrt,
+ char *buf, size_t count)
+{
+ struct iwl_dbg_host_event_cfg_cmd event_cfg;
+ struct iwl_host_cmd hcmd = {
+ .id = WIDE_ID(DEBUG_GROUP, HOST_EVENT_CFG),
+ .flags = CMD_ASYNC,
+ .data[0] = &event_cfg,
+ .len[0] = sizeof(event_cfg),
+ };
+ u32 enabled_severities;
+ int ret = kstrtou32(buf, 10, &enabled_severities);
+
+ if (ret < 0)
+ return ret;
+
+ event_cfg.enabled_severities = cpu_to_le32(enabled_severities);
+
+ ret = iwl_trans_send_cmd(fwrt->trans, &hcmd);
+ IWL_INFO(fwrt,
+ "sent host event cfg with enabled_severities: %u, ret: %d\n",
+ enabled_severities, ret);
+
+ return ret ?: count;
+}
+
+FWRT_DEBUGFS_WRITE_FILE_OPS(enabled_severities, 16);
+
+static void iwl_fw_timestamp_marker_wk(struct work_struct *work)
+{
+ int ret;
+ struct iwl_fw_runtime *fwrt =
+ container_of(work, struct iwl_fw_runtime, timestamp.wk.work);
+ unsigned long delay = fwrt->timestamp.delay;
+
+ ret = iwl_fw_send_timestamp_marker_cmd(fwrt);
+ if (!ret && delay)
+ schedule_delayed_work(&fwrt->timestamp.wk,
+ round_jiffies_relative(delay));
+ else
+ IWL_INFO(fwrt,
+ "stopping timestamp_marker, ret: %d, delay: %u\n",
+ ret, jiffies_to_msecs(delay) / 1000);
+}
+
+void iwl_fw_trigger_timestamp(struct iwl_fw_runtime *fwrt, u32 delay)
+{
+ IWL_INFO(fwrt,
+ "starting timestamp_marker trigger with delay: %us\n",
+ delay);
+
+ iwl_fw_cancel_timestamp(fwrt);
+
+ fwrt->timestamp.delay = msecs_to_jiffies(delay * 1000);
+
+ schedule_delayed_work(&fwrt->timestamp.wk,
+ round_jiffies_relative(fwrt->timestamp.delay));
+}
+
+static ssize_t iwl_dbgfs_timestamp_marker_write(struct iwl_fw_runtime *fwrt,
+ char *buf, size_t count)
+{
+ int ret;
+ u32 delay;
+
+ ret = kstrtou32(buf, 10, &delay);
+ if (ret < 0)
+ return ret;
+
+ iwl_fw_trigger_timestamp(fwrt, delay);
+
+ return count;
+}
+
+static ssize_t iwl_dbgfs_timestamp_marker_read(struct iwl_fw_runtime *fwrt,
+ size_t size, char *buf)
+{
+ u32 delay_secs = jiffies_to_msecs(fwrt->timestamp.delay) / 1000;
+
+ return scnprintf(buf, size, "%d\n", delay_secs);
+}
+
+FWRT_DEBUGFS_READ_WRITE_FILE_OPS(timestamp_marker, 16);
+
+struct hcmd_write_data {
+ __be32 cmd_id;
+ __be32 flags;
+ __be16 length;
+ u8 data[];
+} __packed;
+
+static ssize_t iwl_dbgfs_send_hcmd_write(struct iwl_fw_runtime *fwrt, char *buf,
+ size_t count)
+{
+ size_t header_size = (sizeof(u32) * 2 + sizeof(u16)) * 2;
+ size_t data_size = (count - 1) / 2;
+ int ret;
+ struct hcmd_write_data *data;
+ struct iwl_host_cmd hcmd = {
+ .len = { 0, },
+ .data = { NULL, },
+ };
+
+ if (fwrt->ops && fwrt->ops->fw_running &&
+ !fwrt->ops->fw_running(fwrt->ops_ctx))
+ return -EIO;
+
+ if (count < header_size + 1 || count > 1024 * 4)
+ return -EINVAL;
+
+ data = kmalloc(data_size, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ret = hex2bin((u8 *)data, buf, data_size);
+ if (ret)
+ goto out;
+
+ hcmd.id = be32_to_cpu(data->cmd_id);
+ hcmd.flags = be32_to_cpu(data->flags);
+ hcmd.len[0] = be16_to_cpu(data->length);
+ hcmd.data[0] = data->data;
+
+ if (count != header_size + hcmd.len[0] * 2 + 1) {
+ IWL_ERR(fwrt,
+ "host command data size does not match header length\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (fwrt->ops && fwrt->ops->send_hcmd)
+ ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd);
+ else
+ ret = -EPERM;
+
+ if (ret < 0)
+ goto out;
+
+ if (hcmd.flags & CMD_WANT_SKB)
+ iwl_free_resp(&hcmd);
+out:
+ kfree(data);
+ return ret ?: count;
+}
+
+FWRT_DEBUGFS_WRITE_FILE_OPS(send_hcmd, 512);
+
+static ssize_t iwl_dbgfs_fw_dbg_domain_read(struct iwl_fw_runtime *fwrt,
+ size_t size, char *buf)
+{
+ return scnprintf(buf, size, "0x%08x\n",
+ fwrt->trans->dbg.domains_bitmap);
+}
+
+FWRT_DEBUGFS_READ_FILE_OPS(fw_dbg_domain, 20);
+
+struct iwl_dbgfs_fw_info_priv {
+ struct iwl_fw_runtime *fwrt;
+};
+
+struct iwl_dbgfs_fw_info_state {
+ loff_t pos;
+};
+
+static void *iwl_dbgfs_fw_info_seq_next(struct seq_file *seq,
+ void *v, loff_t *pos)
+{
+ struct iwl_dbgfs_fw_info_state *state = v;
+ struct iwl_dbgfs_fw_info_priv *priv = seq->private;
+ const struct iwl_fw *fw = priv->fwrt->fw;
+
+ *pos = ++state->pos;
+ if (*pos >= fw->ucode_capa.n_cmd_versions) {
+ kfree(state);
+ return NULL;
+ }
+
+ return state;
+}
+
+static void iwl_dbgfs_fw_info_seq_stop(struct seq_file *seq,
+ void *v)
+{
+ kfree(v);
+}
+
+static void *iwl_dbgfs_fw_info_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct iwl_dbgfs_fw_info_priv *priv = seq->private;
+ const struct iwl_fw *fw = priv->fwrt->fw;
+ struct iwl_dbgfs_fw_info_state *state;
+
+ if (*pos >= fw->ucode_capa.n_cmd_versions)
+ return NULL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+ state->pos = *pos;
+ return state;
+};
+
+static int iwl_dbgfs_fw_info_seq_show(struct seq_file *seq, void *v)
+{
+ struct iwl_dbgfs_fw_info_state *state = v;
+ struct iwl_dbgfs_fw_info_priv *priv = seq->private;
+ const struct iwl_fw *fw = priv->fwrt->fw;
+ const struct iwl_fw_cmd_version *ver;
+ u32 cmd_id;
+ int has_capa;
+
+ if (!state->pos) {
+ seq_puts(seq, "fw_capa:\n");
+ has_capa = fw_has_capa(&fw->ucode_capa,
+ IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT) ? 1 : 0;
+ seq_printf(seq,
+ " %d: %d\n",
+ IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT,
+ has_capa);
+ seq_puts(seq, "fw_api_ver:\n");
+ }
+
+ ver = &fw->ucode_capa.cmd_versions[state->pos];
+
+ cmd_id = WIDE_ID(ver->group, ver->cmd);
+
+ seq_printf(seq, " 0x%04x:\n", cmd_id);
+ seq_printf(seq, " name: %s\n",
+ iwl_get_cmd_string(priv->fwrt->trans, cmd_id));
+ seq_printf(seq, " cmd_ver: %d\n", ver->cmd_ver);
+ seq_printf(seq, " notif_ver: %d\n", ver->notif_ver);
+ return 0;
+}
+
+static const struct seq_operations iwl_dbgfs_info_seq_ops = {
+ .start = iwl_dbgfs_fw_info_seq_start,
+ .next = iwl_dbgfs_fw_info_seq_next,
+ .stop = iwl_dbgfs_fw_info_seq_stop,
+ .show = iwl_dbgfs_fw_info_seq_show,
+};
+
+static int iwl_dbgfs_fw_info_open(struct inode *inode, struct file *filp)
+{
+ struct iwl_dbgfs_fw_info_priv *priv;
+
+ priv = __seq_open_private(filp, &iwl_dbgfs_info_seq_ops,
+ sizeof(*priv));
+
+ if (!priv)
+ return -ENOMEM;
+
+ priv->fwrt = inode->i_private;
+ return 0;
+}
+
+static const struct file_operations iwl_dbgfs_fw_info_ops = {
+ .owner = THIS_MODULE,
+ .open = iwl_dbgfs_fw_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+void iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt,
+ struct dentry *dbgfs_dir)
+{
+ INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk);
+ FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, 0200);
+ FWRT_DEBUGFS_ADD_FILE(fw_info, dbgfs_dir, 0200);
+ FWRT_DEBUGFS_ADD_FILE(send_hcmd, dbgfs_dir, 0200);
+ FWRT_DEBUGFS_ADD_FILE(enabled_severities, dbgfs_dir, 0200);
+ FWRT_DEBUGFS_ADD_FILE(fw_dbg_domain, dbgfs_dir, 0400);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-24 01:37:10 +0000