From: Johannes Berg <johannes.berg@xxxxxxxxx>
Implement CSI (channel estimation matrix) reporting in the mvm
driver, if the firmware has the capability.
Currently only a debugfs API is provided as the API is still
under discussion.
For now, RX aggregation must be disabled to use this feature
on data frames as we haven't found a good way to attach the
data to A-MPDUs, given complexities with multi-queue.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
---
.../wireless/intel/iwlwifi/fw/api/datapath.h | 55 +++++++++++++++++++
.../wireless/intel/iwlwifi/fw/api/location.h | 20 +++++++
.../net/wireless/intel/iwlwifi/fw/api/rx.h | 2 +
drivers/net/wireless/intel/iwlwifi/fw/file.h | 7 ++-
.../net/wireless/intel/iwlwifi/mvm/debugfs.c | 1 +
drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 1 +
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 20 +++----
7 files changed, 94 insertions(+), 12 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
index fdc54a5dc9de..93c06e6c1ced 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
@@ -104,6 +104,12 @@ enum iwl_data_path_subcmd_ids {
*/
HE_AIR_SNIFFER_CONFIG_CMD = 0x13,
+ /**
+ * @CHEST_COLLECTOR_FILTER_CONFIG_CMD: Configure the CSI
+ * matrix collection, uses &struct iwl_channel_estimation_cfg
+ */
+ CHEST_COLLECTOR_FILTER_CONFIG_CMD = 0x14,
+
/**
* @RX_NO_DATA_NOTIF: &struct iwl_rx_no_data
*/
@@ -156,4 +162,53 @@ struct iwl_mu_group_mgmt_notif {
__le32 user_position[4];
} __packed; /* MU_GROUP_MNG_NTFY_API_S_VER_1 */
+enum iwl_channel_estimation_flags {
+ IWL_CHANNEL_ESTIMATION_ENABLE = BIT(0),
+ IWL_CHANNEL_ESTIMATION_TIMER = BIT(1),
+ IWL_CHANNEL_ESTIMATION_COUNTER = BIT(2),
+};
+
+/**
+ * struct iwl_channel_estimation_cfg - channel estimation reporting config
+ */
+struct iwl_channel_estimation_cfg {
+ /**
+ * @flags: flags, see &enum iwl_channel_estimation_flags
+ */
+ __le32 flags;
+ /**
+ * @timer: if enabled via flags, automatically disable after this many
+ * microseconds
+ */
+ __le32 timer;
+ /**
+ * @count: if enabled via flags, automatically disable after this many
+ * frames with channel estimation matrix were captured
+ */
+ __le32 count;
+ /**
+ * @rate_n_flags_mask: only try to record the channel estimation matrix
+ * if the rate_n_flags value for the received frame (let's call
+ * that rx_rnf) matches the mask/value given here like this:
+ * (rx_rnf & rate_n_flags_mask) == rate_n_flags_val.
+ */
+ __le32 rate_n_flags_mask;
+ /**
+ * @rate_n_flags_val: see @rate_n_flags_mask
+ */
+ __le32 rate_n_flags_val;
+ /**
+ * @reserved: reserved (for alignment)
+ */
+ __le32 reserved;
+ /**
+ * @frame_types: bitmap of frame types to capture, the received frame's
+ * subtype|type takes 6 bits in the frame and the corresponding bit
+ * in this field must be set to 1 to capture channel estimation for
+ * that frame type. Set to all-ones to enable capturing for all
+ * frame types.
+ */
+ __le64 frame_types;
+} __packed; /* CHEST_COLLECTOR_FILTER_CMD_API_S_VER_1 */
+
#endif /* __iwl_fw_api_datapath_h__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/location.h b/drivers/net/wireless/intel/iwlwifi/fw/api/location.h
index 0df0851b9513..6da91ec0df55 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/location.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/location.h
@@ -93,6 +93,15 @@ enum iwl_location_subcmd_ids {
* uses &struct iwl_tof_responder_dyn_config_cmd
*/
TOF_RESPONDER_DYN_CONFIG_CMD = 0x5,
+ /**
+ * @CSI_HEADER_NOTIFICATION: CSI header
+ */
+ CSI_HEADER_NOTIFICATION = 0xFA,
+ /**
+ * @CSI_CHUNKS_NOTIFICATION: CSI chunk,
+ * uses &struct iwl_csi_chunk_notification
+ */
+ CSI_CHUNKS_NOTIFICATION = 0xFB,
/**
* @TOF_LC_NOTIF: used for LCI/civic location, contains just
* the action frame
@@ -688,4 +697,15 @@ struct iwl_ftm_responder_stats {
__le16 reserved;
} __packed; /* TOF_RESPONDER_STATISTICS_NTFY_S_VER_2 */
+#define IWL_CSI_CHUNK_CTL_NUM_MASK 0x3
+#define IWL_CSI_CHUNK_CTL_IDX_MASK 0xc
+
+struct iwl_csi_chunk_notification {
+ __le32 token;
+ __le16 seq;
+ __le16 ctl;
+ __le32 size;
+ u8 data[];
+} __packed; /* CSI_CHUNKS_HDR_NTFY_API_S_VER_1 */
+
#endif /* __iwl_fw_api_location_h__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h b/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h
index 11c25f32a286..6e8224ce8906 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/rx.h
@@ -333,6 +333,8 @@ enum iwl_rx_mpdu_phy_info {
IWL_RX_MPDU_PHY_AMPDU = BIT(5),
IWL_RX_MPDU_PHY_AMPDU_TOGGLE = BIT(6),
IWL_RX_MPDU_PHY_SHORT_PREAMBLE = BIT(7),
+ /* short preamble is only for CCK, for non-CCK overridden by this */
+ IWL_RX_MPDU_PHY_NCCK_ADDTL_NTFY = BIT(7),
IWL_RX_MPDU_PHY_TSF_OVERLOAD = BIT(8),
};
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/file.h b/drivers/net/wireless/intel/iwlwifi/fw/file.h
index dfe02bdb7481..f73c5c697690 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/file.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/file.h
@@ -356,10 +356,13 @@ typedef unsigned int __bitwise iwl_ucode_tlv_capa_t;
* @IWL_UCODE_TLV_CAPA_TX_POWER_ACK: reduced TX power API has larger
* command size (command version 4) that supports toggling ACK TX
* power reduction.
- * @IWL_UCODE_TLV_CAPA_MLME_OFFLOAD: supports MLME offload
* @IWL_UCODE_TLV_CAPA_D3_DEBUG: supports debug recording during D3
* @IWL_UCODE_TLV_CAPA_MCC_UPDATE_11AX_SUPPORT: MCC response support 11ax
* capability.
+ * @IWL_UCODE_TLV_CAPA_CSI_REPORTING: firmware is capable of being configured
+ * to report the CSI information with (certain) RX frames
+ *
+ * @IWL_UCODE_TLV_CAPA_MLME_OFFLOAD: supports MLME offload
*
* @NUM_IWL_UCODE_TLV_CAPA: number of bits used
*/
@@ -410,6 +413,8 @@ enum iwl_ucode_tlv_capa {
IWL_UCODE_TLV_CAPA_D3_DEBUG = (__force iwl_ucode_tlv_capa_t)87,
IWL_UCODE_TLV_CAPA_LED_CMD_SUPPORT = (__force iwl_ucode_tlv_capa_t)88,
IWL_UCODE_TLV_CAPA_MCC_UPDATE_11AX_SUPPORT = (__force iwl_ucode_tlv_capa_t)89,
+ IWL_UCODE_TLV_CAPA_CSI_REPORTING = (__force iwl_ucode_tlv_capa_t)90,
+
IWL_UCODE_TLV_CAPA_MLME_OFFLOAD = (__force iwl_ucode_tlv_capa_t)96,
NUM_IWL_UCODE_TLV_CAPA
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index cbbd4b076e17..91b46361ac9f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -69,6 +69,7 @@
#include "sta.h"
#include "iwl-io.h"
#include "debugfs.h"
+#include "iwl-modparams.h"
#include "fw/error-dump.h"
static ssize_t iwl_dbgfs_ctdp_budget_read(struct file *file,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index c7ec36ceb661..5e4f8b767d10 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -445,6 +445,7 @@ static const struct iwl_hcmd_names iwl_mvm_data_path_names[] = {
HCMD_NAME(TRIGGER_RX_QUEUES_NOTIF_CMD),
HCMD_NAME(STA_HE_CTXT_CMD),
HCMD_NAME(RFH_QUEUE_CONFIG_CMD),
+ HCMD_NAME(CHEST_COLLECTOR_FILTER_CONFIG_CMD),
HCMD_NAME(STA_PM_NOTIF),
HCMD_NAME(MU_GROUP_MGMT_NOTIF),
HCMD_NAME(RX_QUEUES_NOTIFICATION),
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 120e3f2d21aa..7b6f4585fec9 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -201,18 +201,10 @@ static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
if (!(rx_status->flag & RX_FLAG_NO_PSDU) &&
- iwl_mvm_check_pn(mvm, skb, queue, sta)) {
+ iwl_mvm_check_pn(mvm, skb, queue, sta))
kfree_skb(skb);
- } else {
- unsigned int radiotap_len = 0;
-
- if (rx_status->flag & RX_FLAG_RADIOTAP_HE)
- radiotap_len += sizeof(struct ieee80211_radiotap_he);
- if (rx_status->flag & RX_FLAG_RADIOTAP_HE_MU)
- radiotap_len += sizeof(struct ieee80211_radiotap_he_mu);
- __skb_push(skb, radiotap_len);
+ else
ieee80211_rx_napi(mvm->hw, sta, skb, napi);
- }
}
static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
@@ -1438,9 +1430,15 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
bool toggle_bit = phy_info & IWL_RX_MPDU_PHY_AMPDU_TOGGLE;
rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
- /* toggle is switched whenever new aggregation starts */
+ /*
+ * Toggle is switched whenever new aggregation starts. Make
+ * sure ampdu_reference is never 0 so we can later use it to
+ * see if the frame was really part of an A-MPDU or not.
+ */
if (toggle_bit != mvm->ampdu_toggle) {
mvm->ampdu_ref++;
+ if (mvm->ampdu_ref == 0)
+ mvm->ampdu_ref++;
mvm->ampdu_toggle = toggle_bit;
}
rx_status->ampdu_reference = mvm->ampdu_ref;
--
2.20.1
