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| author | Gregory Greenman <gregory.greenman@intel.com> | 2021-02-10 17:15:03 +0200 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2021-02-11 01:52:06 +0200 |
| commit | 21254908cbe995a3982a23da32c30d1b43467043 (patch) | |
| tree | 6a69369ecf5b35fc378f7dcdb19596d554c8d79e /drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | |
| parent | 3ce882473ec4321c8b14ea30f36bfeaa18335413 (diff) | |
| download | linux-21254908cbe995a3982a23da32c30d1b43467043.tar.gz linux-21254908cbe995a3982a23da32c30d1b43467043.tar.bz2 linux-21254908cbe995a3982a23da32c30d1b43467043.zip | |
iwlwifi: mvm: add RFI-M support
RF Interference Mitigation is a new feature targeted to handle the
problem of interference between DDR memory and WiFi. The role of
the driver is to configure FW with the table holding a mapping
between problematic channels/bands and the corresponding frequencies.
This patch adds RFI infrastructure and adds two debugfs hooks:
- send RFI configuration command (currently with a default table) which
will reset feature in the FW
- read the table, used by the FW (which can be a subset of the table
that driver sent).
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210210171218.2cea55a09bc7.I634b79795abad499ce442631d6672ffef8fc6d41@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c index efc908231d74..90143b16e665 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c @@ -1776,6 +1776,69 @@ iwl_dbgfs_ltr_config_write(struct iwl_mvm *mvm, return ret ?: count; } +static ssize_t iwl_dbgfs_rfi_freq_table_write(struct iwl_mvm *mvm, char *buf, + size_t count, loff_t *ppos) +{ + int ret = 0; + u16 op_id; + + if (kstrtou16(buf, 10, &op_id)) + return -EINVAL; + + /* value zero triggers re-sending the default table to the device */ + if (!op_id) + ret = iwl_rfi_send_config_cmd(mvm, NULL); + else + ret = -EOPNOTSUPP; /* in the future a new table will be added */ + + return ret ?: count; +} + +/* The size computation is as follows: + * each number needs at most 3 characters, number of rows is the size of + * the table; So, need 5 chars for the "freq: " part and each tuple afterwards + * needs 6 characters for numbers and 5 for the punctuation around. + */ +#define IWL_RFI_BUF_SIZE (IWL_RFI_LUT_INSTALLED_SIZE *\ + (5 + IWL_RFI_LUT_ENTRY_CHANNELS_NUM * (6 + 5))) + +static ssize_t iwl_dbgfs_rfi_freq_table_read(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct iwl_mvm *mvm = file->private_data; + struct iwl_rfi_freq_table_resp_cmd *resp; + u32 status; + char buf[IWL_RFI_BUF_SIZE]; + int i, j, pos = 0; + + resp = iwl_rfi_get_freq_table(mvm); + if (IS_ERR(resp)) + return PTR_ERR(resp); + + status = le32_to_cpu(resp->status); + if (status != RFI_FREQ_TABLE_OK) { + scnprintf(buf, IWL_RFI_BUF_SIZE, "status = %d\n", status); + goto out; + } + + for (i = 0; i < ARRAY_SIZE(resp->table); i++) { + pos += scnprintf(buf + pos, IWL_RFI_BUF_SIZE - pos, "%d: ", + resp->table[i].freq); + + for (j = 0; j < ARRAY_SIZE(resp->table[i].channels); j++) + pos += scnprintf(buf + pos, IWL_RFI_BUF_SIZE - pos, + "(%d, %d) ", + resp->table[i].channels[j], + resp->table[i].bands[j]); + pos += scnprintf(buf + pos, IWL_RFI_BUF_SIZE - pos, "\n"); + } + +out: + kfree(resp); + return simple_read_from_buffer(user_buf, count, ppos, buf, pos); +} + MVM_DEBUGFS_READ_WRITE_FILE_OPS(prph_reg, 64); /* Device wide debugfs entries */ @@ -1827,6 +1890,7 @@ MVM_DEBUGFS_READ_WRITE_STA_FILE_OPS(amsdu_len, 16); MVM_DEBUGFS_READ_WRITE_FILE_OPS(he_sniffer_params, 32); MVM_DEBUGFS_WRITE_FILE_OPS(ltr_config, 512); +MVM_DEBUGFS_READ_WRITE_FILE_OPS(rfi_freq_table, 16); static ssize_t iwl_dbgfs_mem_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) @@ -2010,6 +2074,7 @@ void iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir) MVM_DEBUGFS_ADD_FILE(inject_packet, mvm->debugfs_dir, 0200); MVM_DEBUGFS_ADD_FILE(inject_beacon_ie, mvm->debugfs_dir, 0200); MVM_DEBUGFS_ADD_FILE(inject_beacon_ie_restore, mvm->debugfs_dir, 0200); + MVM_DEBUGFS_ADD_FILE(rfi_freq_table, mvm->debugfs_dir, 0600); if (mvm->fw->phy_integration_ver) MVM_DEBUGFS_ADD_FILE(phy_integration_ver, mvm->debugfs_dir, 0400); |