ath10k: Add paddrs_ring_64 support for 64bit target

paddrs_ring_64 holds the physical device address of the
rx buffers that host SW provides for the MAC HW to fill.
Since this field is used in rx ring setup and rx ring
replenish in rx data path. Define separate methods
for handling 64 bit ring paddr and attach them dynamically
based on target_64bit hw param flag. Use u64 type
while popping paddr from the rx hash table for 64bit target.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/htt.c

@@ -208,6 +208,7 @@ int ath10k_htt_init(struct ath10k *ar)
 		return -EINVAL;
 	}
 	ath10k_htt_set_tx_ops(htt);
+	ath10k_htt_set_rx_ops(htt);
 
 	return 0;
 }

drivers/net/wireless/ath/ath10k/htt.h

@@ -1725,7 +1725,10 @@ struct ath10k_htt {
 		 * rx buffers the host SW provides for the MAC HW to
 		 * fill.
 		 */
-		__le32 *paddrs_ring;
+		union {
+			__le64 *paddrs_ring_64;
+			__le32 *paddrs_ring_32;
+		};
 
 		/*
 		 * Base address of ring, as a "physical" device address
@@ -1831,6 +1834,7 @@ struct ath10k_htt {
 
 	bool tx_mem_allocated;
 	const struct ath10k_htt_tx_ops *tx_ops;
+	const struct ath10k_htt_rx_ops *rx_ops;
 };
 
 struct ath10k_htt_tx_ops {
@@ -1844,6 +1848,14 @@ struct ath10k_htt_tx_ops {
 	void (*htt_free_txbuff)(struct ath10k_htt *htt);
 };
 
+struct ath10k_htt_rx_ops {
+	size_t (*htt_get_rx_ring_size)(struct ath10k_htt *htt);
+	void (*htt_config_paddrs_ring)(struct ath10k_htt *htt, void *vaddr);
+	void (*htt_set_paddrs_ring)(struct ath10k_htt *htt, dma_addr_t paddr,
+				    int idx);
+	void* (*htt_get_vaddr_ring)(struct ath10k_htt *htt);
+	void (*htt_reset_paddrs_ring)(struct ath10k_htt *htt, int idx);
+};
 #define RX_HTT_HDR_STATUS_LEN 64
 
 /* This structure layout is programmed via rx ring setup
@@ -1950,4 +1962,5 @@ void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
 					     struct sk_buff *skb);
 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget);
 void ath10k_htt_set_tx_ops(struct ath10k_htt *htt);
+void ath10k_htt_set_rx_ops(struct ath10k_htt *htt);
 #endif

drivers/net/wireless/ath/ath10k/htt_rx.c

@@ -33,7 +33,7 @@
 static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
 
 static struct sk_buff *
-ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u32 paddr)
+ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u64 paddr)
 {
 	struct ath10k_skb_rxcb *rxcb;
 
@@ -81,6 +81,60 @@ static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
 	       htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
 }
 
+static size_t ath10k_htt_get_rx_ring_size_32(struct ath10k_htt *htt)
+{
+	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_32);
+}
+
+static size_t ath10k_htt_get_rx_ring_size_64(struct ath10k_htt *htt)
+{
+	return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_64);
+}
+
+static void ath10k_htt_config_paddrs_ring_32(struct ath10k_htt *htt,
+					     void *vaddr)
+{
+	htt->rx_ring.paddrs_ring_32 = vaddr;
+}
+
+static void ath10k_htt_config_paddrs_ring_64(struct ath10k_htt *htt,
+					     void *vaddr)
+{
+	htt->rx_ring.paddrs_ring_64 = vaddr;
+}
+
+static void ath10k_htt_set_paddrs_ring_32(struct ath10k_htt *htt,
+					  dma_addr_t paddr, int idx)
+{
+	htt->rx_ring.paddrs_ring_32[idx] = __cpu_to_le32(paddr);
+}
+
+static void ath10k_htt_set_paddrs_ring_64(struct ath10k_htt *htt,
+					  dma_addr_t paddr, int idx)
+{
+	htt->rx_ring.paddrs_ring_64[idx] = __cpu_to_le64(paddr);
+}
+
+static void ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt *htt, int idx)
+{
+	htt->rx_ring.paddrs_ring_32[idx] = 0;
+}
+
+static void ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt *htt, int idx)
+{
+	htt->rx_ring.paddrs_ring_64[idx] = 0;
+}
+
+static void *ath10k_htt_get_vaddr_ring_32(struct ath10k_htt *htt)
+{
+	return (void *)htt->rx_ring.paddrs_ring_32;
+}
+
+static void *ath10k_htt_get_vaddr_ring_64(struct ath10k_htt *htt)
+{
+	return (void *)htt->rx_ring.paddrs_ring_64;
+}
+
 static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 {
 	struct htt_rx_desc *rx_desc;
@@ -126,13 +180,13 @@ static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
 		rxcb = ATH10K_SKB_RXCB(skb);
 		rxcb->paddr = paddr;
 		htt->rx_ring.netbufs_ring[idx] = skb;
-		htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
+		htt->rx_ops->htt_set_paddrs_ring(htt, paddr, idx);
 		htt->rx_ring.fill_cnt++;
 
 		if (htt->rx_ring.in_ord_rx) {
 			hash_add(htt->rx_ring.skb_table,
 				 &ATH10K_SKB_RXCB(skb)->hlist,
-				 (u32)paddr);
+				 paddr);
 		}
 
 		num--;
@@ -231,9 +285,8 @@ void ath10k_htt_rx_free(struct ath10k_htt *htt)
 	ath10k_htt_rx_ring_free(htt);
 
 	dma_free_coherent(htt->ar->dev,
-			  (htt->rx_ring.size *
-			   sizeof(htt->rx_ring.paddrs_ring)),
-			  htt->rx_ring.paddrs_ring,
+			  htt->rx_ops->htt_get_rx_ring_size(htt),
+			  htt->rx_ops->htt_get_vaddr_ring(htt),
 			  htt->rx_ring.base_paddr);
 
 	dma_free_coherent(htt->ar->dev,
@@ -260,7 +313,7 @@ static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
 	idx = htt->rx_ring.sw_rd_idx.msdu_payld;
 	msdu = htt->rx_ring.netbufs_ring[idx];
 	htt->rx_ring.netbufs_ring[idx] = NULL;
-	htt->rx_ring.paddrs_ring[idx] = 0;
+	htt->rx_ops->htt_reset_paddrs_ring(htt, idx);
 
 	idx++;
 	idx &= htt->rx_ring.size_mask;
@@ -380,7 +433,7 @@ static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
 }
 
 static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
-					       u32 paddr)
+					       u64 paddr)
 {
 	struct ath10k *ar = htt->ar;
 	struct ath10k_skb_rxcb *rxcb;
@@ -508,7 +561,7 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 {
 	struct ath10k *ar = htt->ar;
 	dma_addr_t paddr;
-	void *vaddr;
+	void *vaddr, *vaddr_ring;
 	size_t size;
 	struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
 
@@ -532,13 +585,13 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 	if (!htt->rx_ring.netbufs_ring)
 		goto err_netbuf;
 
-	size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
+	size = htt->rx_ops->htt_get_rx_ring_size(htt);
 
-	vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
-	if (!vaddr)
+	vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
+	if (!vaddr_ring)
 		goto err_dma_ring;
 
-	htt->rx_ring.paddrs_ring = vaddr;
+	htt->rx_ops->htt_config_paddrs_ring(htt, vaddr_ring);
 	htt->rx_ring.base_paddr = paddr;
 
 	vaddr = dma_alloc_coherent(htt->ar->dev,
@@ -572,9 +625,8 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
 
 err_dma_idx:
 	dma_free_coherent(htt->ar->dev,
-			  (htt->rx_ring.size *
-			   sizeof(htt->rx_ring.paddrs_ring)),
-			  htt->rx_ring.paddrs_ring,
+			  htt->rx_ops->htt_get_rx_ring_size(htt),
+			  vaddr_ring,
 			  htt->rx_ring.base_paddr);
 err_dma_ring:
 	kfree(htt->rx_ring.netbufs_ring);
@@ -2847,3 +2899,29 @@ exit:
 	return done;
 }
 EXPORT_SYMBOL(ath10k_htt_txrx_compl_task);
+
+static const struct ath10k_htt_rx_ops htt_rx_ops_32 = {
+	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_32,
+	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_32,
+	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_32,
+	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_32,
+	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_32,
+};
+
+static const struct ath10k_htt_rx_ops htt_rx_ops_64 = {
+	.htt_get_rx_ring_size = ath10k_htt_get_rx_ring_size_64,
+	.htt_config_paddrs_ring = ath10k_htt_config_paddrs_ring_64,
+	.htt_set_paddrs_ring = ath10k_htt_set_paddrs_ring_64,
+	.htt_get_vaddr_ring = ath10k_htt_get_vaddr_ring_64,
+	.htt_reset_paddrs_ring = ath10k_htt_reset_paddrs_ring_64,
+};
+
+void ath10k_htt_set_rx_ops(struct ath10k_htt *htt)
+{
+	struct ath10k *ar = htt->ar;
+
+	if (ar->hw_params.target_64bit)
+		htt->rx_ops = &htt_rx_ops_64;
+	else
+		htt->rx_ops = &htt_rx_ops_32;
+}