ath10k: Add support for 64 bit htt rx ring cfg

WCN3900 target uses 64bit rx_ring_base_paddr and
fw_idx_shadow_reg_paddr fields in HTT rx ring cfg message.
These address points to the memory region where remote
ring empty buffers are allocated.
In order to add 64 bit htt rx ring cfg, define separate
64 bit htt rx ring cfg message and attach it in runtime
based on target_64bit hw param flag.

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

@@ -207,6 +207,8 @@ int ath10k_htt_init(struct ath10k *ar)
 		WARN_ON(1);
 		return -EINVAL;
 	}
+	ath10k_htt_set_tx_ops(htt);
+
 	return 0;
 }
 
@@ -258,7 +260,7 @@ int ath10k_htt_setup(struct ath10k_htt *htt)
 	if (status)
 		return status;
 
-	status = ath10k_htt_send_rx_ring_cfg_ll(htt);
+	status = htt->tx_ops->htt_send_rx_ring_cfg(htt);
 	if (status) {
 		ath10k_warn(ar, "failed to setup rx ring: %d\n",
 			    status);

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

@@ -201,7 +201,7 @@ enum htt_rx_ring_flags {
 #define HTT_RX_RING_SIZE_MIN 128
 #define HTT_RX_RING_SIZE_MAX 2048
 
-struct htt_rx_ring_setup_ring {
+struct htt_rx_ring_setup_ring32 {
 	__le32 fw_idx_shadow_reg_paddr;
 	__le32 rx_ring_base_paddr;
 	__le16 rx_ring_len; /* in 4-byte words */
@@ -222,14 +222,40 @@ struct htt_rx_ring_setup_ring {
 	__le16 frag_info_offset;
 } __packed;
 
+struct htt_rx_ring_setup_ring64 {
+	__le64 fw_idx_shadow_reg_paddr;
+	__le64 rx_ring_base_paddr;
+	__le16 rx_ring_len; /* in 4-byte words */
+	__le16 rx_ring_bufsize; /* rx skb size - in bytes */
+	__le16 flags; /* %HTT_RX_RING_FLAGS_ */
+	__le16 fw_idx_init_val;
+
+	/* the following offsets are in 4-byte units */
+	__le16 mac80211_hdr_offset;
+	__le16 msdu_payload_offset;
+	__le16 ppdu_start_offset;
+	__le16 ppdu_end_offset;
+	__le16 mpdu_start_offset;
+	__le16 mpdu_end_offset;
+	__le16 msdu_start_offset;
+	__le16 msdu_end_offset;
+	__le16 rx_attention_offset;
+	__le16 frag_info_offset;
+} __packed;
+
 struct htt_rx_ring_setup_hdr {
 	u8 num_rings; /* supported values: 1, 2 */
 	__le16 rsvd0;
 } __packed;
 
-struct htt_rx_ring_setup {
+struct htt_rx_ring_setup_32 {
 	struct htt_rx_ring_setup_hdr hdr;
-	struct htt_rx_ring_setup_ring rings[0];
+	struct htt_rx_ring_setup_ring32 rings[0];
+} __packed;
+
+struct htt_rx_ring_setup_64 {
+	struct htt_rx_ring_setup_hdr hdr;
+	struct htt_rx_ring_setup_ring64 rings[0];
 } __packed;
 
 /*
@@ -1541,7 +1567,8 @@ struct htt_cmd {
 		struct htt_ver_req ver_req;
 		struct htt_mgmt_tx_desc mgmt_tx;
 		struct htt_data_tx_desc data_tx;
-		struct htt_rx_ring_setup rx_setup;
+		struct htt_rx_ring_setup_32 rx_setup_32;
+		struct htt_rx_ring_setup_64 rx_setup_64;
 		struct htt_stats_req stats_req;
 		struct htt_oob_sync_req oob_sync_req;
 		struct htt_aggr_conf aggr_conf;
@@ -1751,6 +1778,11 @@ struct ath10k_htt {
 	} tx_q_state;
 
 	bool tx_mem_allocated;
+	const struct ath10k_htt_tx_ops *tx_ops;
+};
+
+struct ath10k_htt_tx_ops {
+	int (*htt_send_rx_ring_cfg)(struct ath10k_htt *htt);
 };
 
 #define RX_HTT_HDR_STATUS_LEN 64
@@ -1862,5 +1894,5 @@ int ath10k_htt_tx(struct ath10k_htt *htt,
 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);
 #endif

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

@@ -607,12 +607,50 @@ int ath10k_htt_send_frag_desc_bank_cfg(struct ath10k_htt *htt)
 	return 0;
 }
 
-int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
+static void ath10k_htt_fill_rx_desc_offset_32(void *rx_ring)
+{
+	struct htt_rx_ring_setup_ring32 *ring =
+			(struct htt_rx_ring_setup_ring32 *)rx_ring;
+
+#define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4)
+	ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status));
+	ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload));
+	ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start));
+	ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end));
+	ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start));
+	ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end));
+	ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start));
+	ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end));
+	ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention));
+	ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info));
+#undef desc_offset
+}
+
+static void ath10k_htt_fill_rx_desc_offset_64(void *rx_ring)
+{
+	struct htt_rx_ring_setup_ring64 *ring =
+			(struct htt_rx_ring_setup_ring64 *)rx_ring;
+
+#define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4)
+	ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status));
+	ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload));
+	ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start));
+	ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end));
+	ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start));
+	ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end));
+	ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start));
+	ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end));
+	ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention));
+	ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info));
+#undef desc_offset
+}
+
+static int ath10k_htt_send_rx_ring_cfg_32(struct ath10k_htt *htt)
 {
 	struct ath10k *ar = htt->ar;
 	struct sk_buff *skb;
 	struct htt_cmd *cmd;
-	struct htt_rx_ring_setup_ring *ring;
+	struct htt_rx_ring_setup_ring32 *ring;
 	const int num_rx_ring = 1;
 	u16 flags;
 	u32 fw_idx;
@@ -626,7 +664,7 @@ int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
 	BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4));
 	BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0);
 
-	len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup.hdr)
+	len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup_32.hdr)
 	    + (sizeof(*ring) * num_rx_ring);
 	skb = ath10k_htc_alloc_skb(ar, len);
 	if (!skb)
@@ -635,10 +673,10 @@ int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
 	skb_put(skb, len);
 
 	cmd = (struct htt_cmd *)skb->data;
-	ring = &cmd->rx_setup.rings[0];
+	ring = &cmd->rx_setup_32.rings[0];
 
 	cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG;
-	cmd->rx_setup.hdr.num_rings = 1;
+	cmd->rx_setup_32.hdr.num_rings = 1;
 
 	/* FIXME: do we need all of this? */
 	flags = 0;
@@ -669,21 +707,76 @@ int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
 	ring->flags = __cpu_to_le16(flags);
 	ring->fw_idx_init_val = __cpu_to_le16(fw_idx);
 
-#define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4)
+	ath10k_htt_fill_rx_desc_offset_32(ring);
+	ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
+	if (ret) {
+		dev_kfree_skb_any(skb);
+		return ret;
+	}
 
-	ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status));
-	ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload));
-	ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start));
-	ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end));
-	ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start));
-	ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end));
-	ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start));
-	ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end));
-	ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention));
-	ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info));
+	return 0;
+}
 
-#undef desc_offset
+static int ath10k_htt_send_rx_ring_cfg_64(struct ath10k_htt *htt)
+{
+	struct ath10k *ar = htt->ar;
+	struct sk_buff *skb;
+	struct htt_cmd *cmd;
+	struct htt_rx_ring_setup_ring64 *ring;
+	const int num_rx_ring = 1;
+	u16 flags;
+	u32 fw_idx;
+	int len;
+	int ret;
+
+	/* HW expects the buffer to be an integral number of 4-byte
+	 * "words"
+	 */
+	BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4));
+	BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0);
+
+	len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup_64.hdr)
+	    + (sizeof(*ring) * num_rx_ring);
+	skb = ath10k_htc_alloc_skb(ar, len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put(skb, len);
+
+	cmd = (struct htt_cmd *)skb->data;
+	ring = &cmd->rx_setup_64.rings[0];
+
+	cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG;
+	cmd->rx_setup_64.hdr.num_rings = 1;
+
+	flags = 0;
+	flags |= HTT_RX_RING_FLAGS_MAC80211_HDR;
+	flags |= HTT_RX_RING_FLAGS_MSDU_PAYLOAD;
+	flags |= HTT_RX_RING_FLAGS_PPDU_START;
+	flags |= HTT_RX_RING_FLAGS_PPDU_END;
+	flags |= HTT_RX_RING_FLAGS_MPDU_START;
+	flags |= HTT_RX_RING_FLAGS_MPDU_END;
+	flags |= HTT_RX_RING_FLAGS_MSDU_START;
+	flags |= HTT_RX_RING_FLAGS_MSDU_END;
+	flags |= HTT_RX_RING_FLAGS_RX_ATTENTION;
+	flags |= HTT_RX_RING_FLAGS_FRAG_INFO;
+	flags |= HTT_RX_RING_FLAGS_UNICAST_RX;
+	flags |= HTT_RX_RING_FLAGS_MULTICAST_RX;
+	flags |= HTT_RX_RING_FLAGS_CTRL_RX;
+	flags |= HTT_RX_RING_FLAGS_MGMT_RX;
+	flags |= HTT_RX_RING_FLAGS_NULL_RX;
+	flags |= HTT_RX_RING_FLAGS_PHY_DATA_RX;
+
+	fw_idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
 
+	ring->fw_idx_shadow_reg_paddr = __cpu_to_le64(htt->rx_ring.alloc_idx.paddr);
+	ring->rx_ring_base_paddr = __cpu_to_le64(htt->rx_ring.base_paddr);
+	ring->rx_ring_len = __cpu_to_le16(htt->rx_ring.size);
+	ring->rx_ring_bufsize = __cpu_to_le16(HTT_RX_BUF_SIZE);
+	ring->flags = __cpu_to_le16(flags);
+	ring->fw_idx_init_val = __cpu_to_le16(fw_idx);
+
+	ath10k_htt_fill_rx_desc_offset_64(ring);
 	ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
 	if (ret) {
 		dev_kfree_skb_any(skb);
@@ -1093,3 +1186,21 @@ err_free_msdu_id:
 err:
 	return res;
 }
+
+static const struct ath10k_htt_tx_ops htt_tx_ops_32 = {
+	.htt_send_rx_ring_cfg = ath10k_htt_send_rx_ring_cfg_32,
+};
+
+static const struct ath10k_htt_tx_ops htt_tx_ops_64 = {
+	.htt_send_rx_ring_cfg = ath10k_htt_send_rx_ring_cfg_64,
+};
+
+void ath10k_htt_set_tx_ops(struct ath10k_htt *htt)
+{
+	struct ath10k *ar = htt->ar;
+
+	if (ar->hw_params.target_64bit)
+		htt->tx_ops = &htt_tx_ops_64;
+	else
+		htt->tx_ops = &htt_tx_ops_32;
+}