[PATCH ath-next v3 10/13] wifi: ath12k: ng: add REO qaddr cache clear support

[Pradeep Kumar Chitrapu]

Wi-Fi 8 RX TID setup updates the shared queue-address table. Once REO
queue LUT support is enabled, those updates must invalidate the hardware
qaddr cache or later lookups can use stale queue descriptors.

Register the Wi-Fi 8 cache-clear callback before qref updates are made
reachable so station add cannot call an unset HAL operation.

Tested-on: Compilation only, M=drivers/net/wireless/ath/ath12k
Signed-off-by: Pradeep Kumar Chitrapu <pradeep.chitrapu at oss.qualcomm.com>
---
 .../net/wireless/ath/ath12k/wifi8/hal_qcn9625.c    |  1 +
 drivers/net/wireless/ath/ath12k/wifi8/hal_rx.c     | 23 ++++++++++++++++++++++
 drivers/net/wireless/ath/ath12k/wifi8/hal_rx.h     |  1 +
 3 files changed, 25 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/wifi8/hal_qcn9625.c b/drivers/net/wireless/ath/ath12k/wifi8/hal_qcn9625.c
index 6235668e23cd..bb2f114d97ab 100644
--- a/drivers/net/wireless/ath/ath12k/wifi8/hal_qcn9625.c
+++ b/drivers/net/wireless/ath/ath12k/wifi8/hal_qcn9625.c
@@ -421,6 +421,7 @@ const struct hal_ops hal_qcn9625_ops = {
 	.tx_configure_bank_register = ath12k_wifi8_hal_tx_configure_bank_register,
 	.tx_set_dscp_tid_map = ath12k_wifi8_hal_tx_set_dscp_tid_map,
 	.reo_hw_setup = ath12k_wifi8_hal_reo_hw_setup,
+	.reo_shared_qaddr_cache_clear = ath12k_wifi8_hal_reo_shared_qaddr_cache_clear,
 	.extract_rx_desc_data = ath12k_hal_extract_rx_desc_data_qcn9625,
 	.rx_desc_get_dot11_hdr = ath12k_hal_rx_desc_get_dot11_hdr_qcn9625,
 	.rx_h_is_decrypted = ath12k_hal_rx_h_is_decrypted_qcn9625,
diff --git a/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.c b/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.c
index ad00c182c2bd..d636f6ab60ff 100644
--- a/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.c
+++ b/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.c
@@ -907,6 +907,29 @@ void ath12k_wifi8_hal_reo_update_rx_reo_queue_status(struct ath12k_base *ab,
 	ath12k_wifi8_hal_reo_status_hdr_parse(desc, status);
 }
 
+void ath12k_wifi8_hal_reo_shared_qaddr_cache_clear(struct ath12k_base *ab)
+{
+	struct ath12k_hal *hal = &ab->hal;
+	struct ath12k_dp *dp = ath12k_ab_to_dp(ab);
+	u32 val;
+
+	lockdep_assert_held(&dp->dp_lock);
+
+	if (!ab->hw_params->reoq_lut_support)
+		return;
+
+	val = ath12k_hif_read32(ab, HAL_SEQ_WCSS_UMAC_REO_REG +
+				HAL_REO1_QDESC_ADDR(hal));
+
+	val |= u32_encode_bits(1, HAL_REO_QDESC_ADDR_READ_CLEAR_QDESC_ARRAY);
+	ath12k_hif_write32(ab, HAL_SEQ_WCSS_UMAC_REO_REG +
+			   HAL_REO1_QDESC_ADDR(hal), val);
+
+	val &= ~HAL_REO_QDESC_ADDR_READ_CLEAR_QDESC_ARRAY;
+	ath12k_hif_write32(ab, HAL_SEQ_WCSS_UMAC_REO_REG +
+			   HAL_REO1_QDESC_ADDR(hal), val);
+}
+
 u32 ath12k_wifi8_hal_reo_qdesc_size(u32 ba_window_size, u8 tid)
 {
 	u32 num_ext_desc = ath12k_wifi8_hal_reo_num_ext_desc(ba_window_size);
diff --git a/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.h b/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.h
index 94732f82f614..26a24731cb06 100644
--- a/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.h
+++ b/drivers/net/wireless/ath/ath12k/wifi8/hal_rx.h
@@ -129,6 +129,7 @@ int ath12k_wifi8_hal_reo_cmd_send_n(struct ath12k_base *ab,
 				    struct ath12k_reo_cmd_entry *entries,
 				    int n);
 void ath12k_wifi8_hal_reo_hw_setup(struct ath12k_base *ab);
+void ath12k_wifi8_hal_reo_shared_qaddr_cache_clear(struct ath12k_base *ab);
 void ath12k_wifi8_hal_reo_status_queue_stats(struct ath12k_base *ab,
 					     struct hal_tlv_64_hdr *tlv,
 					     struct hal_reo_status *status);

-- 
2.43.0