[PATCH ath-next v3] wifi: ath12k: add QMI capability negotiation for dynamic memory mode

On AHB platforms, firmware operates in two modes: fixed-memory mode where
firmware uses hardcoded addresses for memory regions such as BDF and does
not request HOST_DDR memory from the host, and dynamic-memory mode where
firmware expects the host to provide memory addresses including HOST_DDR
after the Q6 read-only region and relies on host allocation for all memory
types.

Introduce QMI capability negotiation to support both modes. Add a new QMI
PHY capability flag dynamic_ddr_support which is advertised by firmware to
indicate it supports dynamic memory mode. When the host detects this
capability, set the dynamic_mem_support flag in the host capability message
to signal the host is ready to provide dynamic memory allocation. This
triggers firmware to send the HOST_DDR memory request and use the
host-provided address.

For backward compatibility, if firmware doesn't advertise
dynamic_ddr_support, the firmware continues to operate in fixed-memory mode
where firmware uses predefined addresses.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6-01243-QCAHKSWPL_SILICONZ-1
Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.6-01275-QCAHKSWPL_SILICONZ-1

Signed-off-by: Aaradhana Sahu <[email protected]>
---
v3:
  -Restored QMI_WLANFW_HOST_CAP_REQ_MSG_V01_MAX_LEN change.
v2:
  -Dropped QMI_WLANFW_HOST_CAP_REQ_MSG_V01_MAX_LEN and QMI_WLANFW_PHY_CAP_RESP_MSG_V01_MAX_LEN changes.
  -Used %u instead of %d in the debug log.
---
 drivers/net/wireless/ath/ath12k/qmi.c | 50 +++++++++++++++++++++++++--
 drivers/net/wireless/ath/ath12k/qmi.h |  8 +++--
 2 files changed, 53 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/qmi.c b/drivers/net/wireless/ath/ath12k/qmi.c
index fd762b5d7bb5..e15a0c0120d3 100644
--- a/drivers/net/wireless/ath/ath12k/qmi.c
+++ b/drivers/net/wireless/ath/ath12k/qmi.c
@@ -506,6 +506,24 @@ static const struct qmi_elem_info qmi_wlanfw_host_cap_req_msg_v01_ei[] = {
 		.offset		= offsetof(struct qmi_wlanfw_host_cap_req_msg_v01,
 					   feature_list),
 	},
+	{
+		.data_type	= QMI_OPT_FLAG,
+		.elem_len	= 1,
+		.elem_size	= sizeof(u8),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x33,
+		.offset		= offsetof(struct qmi_wlanfw_host_cap_req_msg_v01,
+					   dynamic_mem_support_valid),
+	},
+	{
+		.data_type	= QMI_UNSIGNED_1_BYTE,
+		.elem_len	= 1,
+		.elem_size	= sizeof(u8),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x33,
+		.offset		= offsetof(struct qmi_wlanfw_host_cap_req_msg_v01,
+					   dynamic_mem_support),
+	},
 	{
 		.data_type	= QMI_EOTI,
 		.array_type	= NO_ARRAY,
@@ -602,6 +620,24 @@ static const struct qmi_elem_info qmi_wlanfw_phy_cap_resp_msg_v01_ei[] = {
 		.offset         = offsetof(struct qmi_wlanfw_phy_cap_resp_msg_v01,
 					   single_chip_mlo_support),
 	},
+	{
+		.data_type	= QMI_OPT_FLAG,
+		.elem_len	= 1,
+		.elem_size	= sizeof(u8),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x17,
+		.offset		= offsetof(struct qmi_wlanfw_phy_cap_resp_msg_v01,
+					   dynamic_ddr_support_valid),
+	},
+	{
+		.data_type	= QMI_UNSIGNED_1_BYTE,
+		.elem_len	= 1,
+		.elem_size	= sizeof(u8),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x17,
+		.offset		= offsetof(struct qmi_wlanfw_phy_cap_resp_msg_v01,
+					   dynamic_ddr_support),
+	},
 	{
 		.data_type	= QMI_EOTI,
 		.array_type	= NO_ARRAY,
@@ -2248,6 +2284,11 @@ int ath12k_qmi_host_cap_send(struct ath12k_base *ab)
 	if (ret < 0)
 		goto out;
 
+	if (ab->qmi.dynamic_ddr_support) {
+		req.dynamic_mem_support_valid = 1;
+		req.dynamic_mem_support = 1;
+	}
+
 	ret = qmi_txn_init(&ab->qmi.handle, &txn,
 			   qmi_wlanfw_host_cap_resp_msg_v01_ei, &resp);
 	if (ret < 0)
@@ -2319,11 +2360,14 @@ static void ath12k_qmi_phy_cap_send(struct ath12k_base *ab)
 
 	ab->qmi.num_radios = resp.num_phy;
 
+	if (resp.dynamic_ddr_support_valid)
+		ab->qmi.dynamic_ddr_support = resp.dynamic_ddr_support;
+
 	ath12k_dbg(ab, ATH12K_DBG_QMI,
-		   "phy capability resp valid %d single_chip_mlo_support %d valid %d num_phy %d valid %d board_id %d\n",
+		   "phy capability resp valid %d single_chip_mlo_support %d valid %d num_phy %d valid %d board_id %d dynamic_ddr_valid %u dynamic_ddr_support %u\n",
 		   resp.single_chip_mlo_support_valid, resp.single_chip_mlo_support,
-		   resp.num_phy_valid, resp.num_phy,
-		   resp.board_id_valid, resp.board_id);
+		   resp.num_phy_valid, resp.num_phy, resp.board_id_valid, resp.board_id,
+		   resp.dynamic_ddr_support_valid, resp.dynamic_ddr_support);
 
 	return;
 
diff --git a/drivers/net/wireless/ath/ath12k/qmi.h b/drivers/net/wireless/ath/ath12k/qmi.h
index 2a63e214eb42..9bdb290e2cce 100644
--- a/drivers/net/wireless/ath/ath12k/qmi.h
+++ b/drivers/net/wireless/ath/ath12k/qmi.h
@@ -156,9 +156,10 @@ struct ath12k_qmi {
 	struct m3_mem_region aux_uc_mem;
 	unsigned int service_ins_id;
 	struct dev_mem_info dev_mem[ATH12K_QMI_WLFW_MAX_DEV_MEM_NUM_V01];
+	u8 dynamic_ddr_support;
 };
 
-#define QMI_WLANFW_HOST_CAP_REQ_MSG_V01_MAX_LEN		261
+#define QMI_WLANFW_HOST_CAP_REQ_MSG_V01_MAX_LEN		265
 #define QMI_WLANFW_HOST_CAP_REQ_V01			0x0034
 #define QMI_WLANFW_HOST_CAP_RESP_MSG_V01_MAX_LEN	7
 #define QMI_WLFW_HOST_CAP_RESP_V01			0x0034
@@ -258,7 +259,8 @@ struct qmi_wlanfw_host_cap_req_msg_v01 {
 	struct wlfw_host_mlo_chip_info_s_v01 mlo_chip_info[QMI_WLFW_MAX_NUM_MLO_CHIPS_V01];
 	u8 feature_list_valid;
 	u64 feature_list;
-
+	u8 dynamic_mem_support_valid;
+	u8 dynamic_mem_support;
 };
 
 struct qmi_wlanfw_host_cap_resp_msg_v01 {
@@ -281,6 +283,8 @@ struct qmi_wlanfw_phy_cap_resp_msg_v01 {
 	u32 board_id;
 	u8 single_chip_mlo_support_valid;
 	u8 single_chip_mlo_support;
+	u8 dynamic_ddr_support_valid;
+	u8 dynamic_ddr_support;
 };
 
 #define QMI_WLANFW_IND_REGISTER_REQ_MSG_V01_MAX_LEN		54

base-commit: 1547a99cd8d8c1ab3e04dbd92b72b3b5f7cb85a9
-- 
2.34.1