wifi: ath12k: subscribe required word mask from rx tlv

Most of the RX descriptors fields are currently not used in the
ath12k driver. Hence add support to selectively subscribe to the
required quad words (64 bits) within msdu_end and mpdu_start of
rx_desc.

Add compact rx_desc structures and configure the bit mask for Rx TLVs
(msdu_end, mpdu_start, mpdu_end) via registers. With these registers
SW can configure to DMA the partial TLV struct to Rx buffer.

Each TLV type has its own register to configure the mask value.
The mask value configured in register will indicate if a particular
QWORD has to be written to rx buffer or not i.e., if Nth bit is enabled
in the mask Nth QWORD will be written and it will not be written if the
bit is disabled in mask. While 0th bit indicates whether TLV tag will be
written or not.

Advantages of Qword subscription of TLVs
- Avoid multiple cache-line misses as the all the required fields
of the TLV are within 128 bytes.
- Memory optimization as TLVs + DATA + SHINFO can fit in 2k buffer
even for 64 bit kernel.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00188-QCAHKSWPL_SILICONZ-1
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Karthikeyan Kathirvel <quic_kathirve@quicinc.com>
Co-developed-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240129065724.2310207-10-quic_rajkbhag@quicinc.com

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath12k/hal.h b/drivers/net/wireless/ath/ath12k/hal.h
index 82517991510b..b7d78ba2b801 100644
--- a/drivers/net/wireless/ath/ath12k/hal.h
+++ b/drivers/net/wireless/ath/ath12k/hal.h
@@ -1082,6 +1082,9 @@ struct hal_rx_ops {
 
 struct hal_ops {
 	int (*create_srng_config)(struct ath12k_base *ab);
+	u16 (*rxdma_ring_wmask_rx_mpdu_start)(void);
+	u32 (*rxdma_ring_wmask_rx_msdu_end)(void);
+	const struct hal_rx_ops *(*get_hal_rx_compact_ops)(void);
 	const struct ath12k_hal_tcl_to_wbm_rbm_map *tcl_to_wbm_rbm_map;
 };
 
@@ -1089,6 +1092,7 @@ extern const struct hal_ops hal_qcn9274_ops;
 extern const struct hal_ops hal_wcn7850_ops;
 
 extern const struct hal_rx_ops hal_rx_qcn9274_ops;
+extern const struct hal_rx_ops hal_rx_qcn9274_compact_ops;
 extern const struct hal_rx_ops hal_rx_wcn7850_ops;
 
 u32 ath12k_hal_reo_qdesc_size(u32 ba_window_size, u8 tid);