diff options
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/debugfs.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c index 1049bdfe1e69..3e120dd47305 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c @@ -258,11 +258,75 @@ static ssize_t iwl_dbgfs_timestamp_marker_read(struct iwl_fw_runtime *fwrt, FWRT_DEBUGFS_READ_WRITE_FILE_OPS(timestamp_marker, 16); +struct hcmd_write_data { + __be32 cmd_id; + __be32 flags; + __be16 length; + u8 data[0]; +} __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); + int 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(send_hcmd, dbgfs_dir, 0200); return 0; err: IWL_ERR(fwrt, "Can't create the fwrt debugfs directory\n"); |