[PATCH v8 1/2] wifi: ath12k: remove skb parameter from get_ring_selector

[Jose Ignacio Tornos Martinez <jtornosm@redhat.com>]

Change the get_ring_selector hw_ops callback signature from
get_ring_selector(struct sk_buff *skb) to get_ring_selector(u8 ac),
removing the dependency on the skb.

All ath12k get_ring_selector implementations fall into two categories:
 - smp_processor_id(): ignores the skb entirely
 - skb_get_queue_mapping(): only reads the AC value from the skb

Since the AC is the only information extracted from the skb, pass it
directly as a u8 parameter instead. Callers in the dp_tx path now
pass skb_get_queue_mapping(skb), which preserves the exact same
behavior.

This change enables a subsequent patch to call get_ring_selector()
from wake_tx_queue using txq->ac, without needing access to the skb.
mac80211 guarantees that skb_get_queue_mapping(skb) == txq->ac
for any skb dequeued from a given txq, since both values are
derived from the same skb->priority through the same AC mapping.

No functional change.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3

Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
---
v8: Split ath11k and ath12k into separate series to avoid conflict
    with Julius's airtime queue limits series (ath11k only) and help to
    unblock both
    No code changes from v7
v7: https://lore.kernel.org/all/20260917064825.12747-3-jtornosm@redhat.com/

 drivers/net/wireless/ath/ath12k/hw.h          | 2 +-
 drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c | 2 +-
 drivers/net/wireless/ath/ath12k/wifi7/hw.c    | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/hw.h b/drivers/net/wireless/ath/ath12k/hw.h
index 86fb8b719613..65caa7a2349f 100644
--- a/drivers/net/wireless/ath/ath12k/hw.h
+++ b/drivers/net/wireless/ath/ath12k/hw.h
@@ -243,7 +243,7 @@ struct ath12k_hw_ops {
 	int (*mac_id_to_pdev_id)(const struct ath12k_hw_params *hw, int mac_id);
 	int (*mac_id_to_srng_id)(const struct ath12k_hw_params *hw, int mac_id);
 	int (*rxdma_ring_sel_config)(struct ath12k_base *ab);
-	u8 (*get_ring_selector)(struct sk_buff *skb);
+	u8 (*get_ring_selector)(u8 ac);
 	bool (*dp_srng_is_tx_comp_ring)(int ring_num);
 	bool (*is_frame_link_agnostic)(struct ath12k_link_vif *arvif,
 				       struct ieee80211_mgmt *mgmt);
diff --git a/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c b/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c
index d2749de44553..74359e8eea47 100644
--- a/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c
+++ b/drivers/net/wireless/ath/ath12k/wifi7/dp_tx.c
@@ -111,7 +111,7 @@ int ath12k_wifi7_dp_tx(struct ath12k_pdev_dp *dp_pdev, struct ath12k_link_vif *a
 	 * If all rings are full, we drop the packet.
 	 * TODO: Add throttling logic when all rings are full
 	 */
-	ring_selector = dp->hw_params->hw_ops->get_ring_selector(skb);
+	ring_selector = dp->hw_params->hw_ops->get_ring_selector(skb_get_queue_mapping(skb));

 tcl_ring_sel:
 	tcl_ring_retry = false;
diff --git a/drivers/net/wireless/ath/ath12k/wifi7/hw.c b/drivers/net/wireless/ath/ath12k/wifi7/hw.c
index d9fdd2fc8298..7436cf70925a 100644
--- a/drivers/net/wireless/ath/ath12k/wifi7/hw.c
+++ b/drivers/net/wireless/ath/ath12k/wifi7/hw.c
@@ -49,7 +49,7 @@ ath12k_wifi7_hw_mac_id_to_srng_id_qcn9274(const struct ath12k_hw_params *hw,
 	return 0;
 }

-static u8 ath12k_wifi7_hw_get_ring_selector_qcn9274(struct sk_buff *skb)
+static u8 ath12k_wifi7_hw_get_ring_selector_qcn9274(u8 ac)
 {
 	return smp_processor_id();
 }
@@ -83,9 +83,9 @@ ath12k_wifi7_hw_mac_id_to_srng_id_wcn7850(const struct ath12k_hw_params *hw,
 	return mac_id;
 }

-static u8 ath12k_wifi7_hw_get_ring_selector_wcn7850(struct sk_buff *skb)
+static u8 ath12k_wifi7_hw_get_ring_selector_wcn7850(u8 ac)
 {
-	return skb_get_queue_mapping(skb);
+	return ac;
 }

 static bool ath12k_wifi7_dp_srng_is_comp_ring_wcn7850(int ring_num)
--
2.54.0