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From: P Praneesh <quic_ppranees@quicinc.com>
To: <ath12k@lists.infradead.org>
CC: <linux-wireless@vger.kernel.org>, P Praneesh <quic_ppranees@quicinc.com>
Subject: [PATCH 3/3] wifi: ath12k: fix firmware crash during reo reinject
Date: Mon, 20 May 2024 12:30:45 +0530
Message-ID: <20240520070045.631029-4-quic_ppranees@quicinc.com>
In-Reply-To: <20240520070045.631029-1-quic_ppranees@quicinc.com>
References: <20240520070045.631029-1-quic_ppranees@quicinc.com>
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When handling fragmented packets, the ath12k driver reassembles each
fragment into a normal packet and then reinjects it into the HW ring.
However, a firmware crash occurs during this reinjection process.
The issue arises because the driver populates peer metadata in
reo_ent_ring->queue_addr_lo, while the firmware expects the physical
address obtained from the corresponding peer’s queue descriptor. Fix it
by filling peer's queue descriptor's physical address in queue_addr_lo.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00209-QCAHKSWPL_SILICONZ-1

Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
Signed-off-by: P Praneesh <quic_ppranees@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/dp_rx.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c
index 2bfcc19d15ea..2adb6c7d4a42 100644
--- a/drivers/net/wireless/ath/ath12k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath12k/dp_rx.c
@@ -2967,7 +2967,7 @@ static int ath12k_dp_rx_h_defrag_reo_reinject(struct ath12k *ar,
 	struct hal_srng *srng;
 	dma_addr_t link_paddr, buf_paddr;
 	u32 desc_bank, msdu_info, msdu_ext_info, mpdu_info;
-	u32 cookie, hal_rx_desc_sz, dest_ring_info0;
+	u32 cookie, hal_rx_desc_sz, dest_ring_info0, queue_addr_hi;
 	int ret;
 	struct ath12k_rx_desc_info *desc_info;
 	enum hal_rx_buf_return_buf_manager idle_link_rbm = dp->idle_link_rbm;
@@ -3060,13 +3060,11 @@ static int ath12k_dp_rx_h_defrag_reo_reinject(struct ath12k *ar,
 	reo_ent_ring->rx_mpdu_info.peer_meta_data =
 		reo_dest_ring->rx_mpdu_info.peer_meta_data;
 
-	/* Firmware expects physical address to be filled in queue_addr_lo in
-	 * the MLO scenario and in case of non MLO peer meta data needs to be
-	 * filled.
-	 * TODO: Need to handle for MLO scenario.
-	 */
-	reo_ent_ring->queue_addr_lo = reo_dest_ring->rx_mpdu_info.peer_meta_data;
-	reo_ent_ring->info0 = le32_encode_bits(dst_ind,
+	reo_ent_ring->queue_addr_lo = cpu_to_le32(lower_32_bits(rx_tid->paddr));
+	queue_addr_hi = upper_32_bits(rx_tid->paddr);
+	reo_ent_ring->info0 = le32_encode_bits(queue_addr_hi,
+					       HAL_REO_ENTR_RING_INFO0_QUEUE_ADDR_HI) |
+			      le32_encode_bits(dst_ind,
 					       HAL_REO_ENTR_RING_INFO0_DEST_IND);
 
 	reo_ent_ring->info1 = le32_encode_bits(rx_tid->cur_sn,
-- 
2.25.1