ath11k: setup WBM_IDLE_LINK ring once again

For WCN6855, WBM idle link ring needs a reinit.
Without this reinit, firmware crash might happen occasionally.
This is requested by the hw team.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1

Signed-off-by: Baochen Qiang <bqiang@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210511162214.29475-5-jouni@codeaurora.org

diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c
index 08e3c72..eaa0edc 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/hal.c
+++ b/drivers/net/wireless/ath/ath11k/hal.c
@@ -382,6 +382,16 @@ static void ath11k_hal_srng_src_hw_init(struct ath11k_base *ab,
        val = FIELD_PREP(HAL_REO1_RING_ID_ENTRY_SIZE, srng->entry_size);
        ath11k_hif_write32(ab, reg_base + HAL_TCL1_RING_ID_OFFSET(ab), val);
 
+       if (srng->ring_id == HAL_SRNG_RING_ID_WBM_IDLE_LINK) {
+               ath11k_hif_write32(ab, reg_base, (u32)srng->ring_base_paddr);
+               val = FIELD_PREP(HAL_TCL1_RING_BASE_MSB_RING_BASE_ADDR_MSB,
+                                ((u64)srng->ring_base_paddr >>
+                                HAL_ADDR_MSB_REG_SHIFT)) |
+                       FIELD_PREP(HAL_TCL1_RING_BASE_MSB_RING_SIZE,
+                                  (srng->entry_size * srng->num_entries));
+               ath11k_hif_write32(ab, reg_base + HAL_TCL1_RING_BASE_MSB_OFFSET(ab), val);
+       }
+
        /* interrupt setup */
        /* NOTE: IPQ8074 v2 requires the interrupt timer threshold in the
         * unit of 8 usecs instead of 1 usec (as required by v1).