wifi: ath12k: ACPI SAR support

In order to enable ACPI SAR (Specific Absorption Rate), ath12k gets SAR and GEO
offset tables from ACPI and sends the data to firmware using
WMI_PDEV_SET_BIOS_SAR_TABLE_CMDID and WMI_PDEV_SET_BIOS_GEO_TABLE_CMDID
commands.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Lingbo Kong <quic_lingbok@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240422033054.979-3-quic_lingbok@quicinc.com

1 files changed, 99 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c
index 511c1e9a2d89..c2fb977d33f6 100644
--- a/drivers/net/wireless/ath/ath12k/wmi.c
+++ b/drivers/net/wireless/ath/ath12k/wmi.c
@@ -2767,6 +2767,105 @@ int ath12k_wmi_set_bios_cmd(struct ath12k_base *ab, u32 param_id,
 	return 0;
 }
 
+int ath12k_wmi_set_bios_sar_cmd(struct ath12k_base *ab, const u8 *psar_table)
+{
+	struct ath12k_wmi_base *wmi_ab = &ab->wmi_ab;
+	struct wmi_pdev_set_bios_sar_table_cmd *cmd;
+	struct wmi_tlv *tlv;
+	struct sk_buff *skb;
+	int ret;
+	u8 *buf_ptr;
+	u32 len, sar_table_len_aligned, sar_dbs_backoff_len_aligned;
+	const u8 *psar_value = psar_table + ATH12K_ACPI_POWER_LIMIT_DATA_OFFSET;
+	const u8 *pdbs_value = psar_table + ATH12K_ACPI_DBS_BACKOFF_DATA_OFFSET;
+
+	sar_table_len_aligned = roundup(ATH12K_ACPI_BIOS_SAR_TABLE_LEN, sizeof(u32));
+	sar_dbs_backoff_len_aligned = roundup(ATH12K_ACPI_BIOS_SAR_DBS_BACKOFF_LEN,
+					      sizeof(u32));
+	len = sizeof(*cmd) + TLV_HDR_SIZE + sar_table_len_aligned +
+		TLV_HDR_SIZE + sar_dbs_backoff_len_aligned;
+
+	skb = ath12k_wmi_alloc_skb(wmi_ab, len);
+	if (!skb)
+		return -ENOMEM;
+
+	cmd = (struct wmi_pdev_set_bios_sar_table_cmd *)skb->data;
+	cmd->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_PDEV_SET_BIOS_SAR_TABLE_CMD,
+						 sizeof(*cmd));
+	cmd->pdev_id = cpu_to_le32(WMI_PDEV_ID_SOC);
+	cmd->sar_len = cpu_to_le32(ATH12K_ACPI_BIOS_SAR_TABLE_LEN);
+	cmd->dbs_backoff_len = cpu_to_le32(ATH12K_ACPI_BIOS_SAR_DBS_BACKOFF_LEN);
+
+	buf_ptr = skb->data + sizeof(*cmd);
+	tlv = (struct wmi_tlv *)buf_ptr;
+	tlv->header = ath12k_wmi_tlv_hdr(WMI_TAG_ARRAY_BYTE,
+					 sar_table_len_aligned);
+	buf_ptr += TLV_HDR_SIZE;
+	memcpy(buf_ptr, psar_value, ATH12K_ACPI_BIOS_SAR_TABLE_LEN);
+
+	buf_ptr += sar_table_len_aligned;
+	tlv = (struct wmi_tlv *)buf_ptr;
+	tlv->header = ath12k_wmi_tlv_hdr(WMI_TAG_ARRAY_BYTE,
+					 sar_dbs_backoff_len_aligned);
+	buf_ptr += TLV_HDR_SIZE;
+	memcpy(buf_ptr, pdbs_value, ATH12K_ACPI_BIOS_SAR_DBS_BACKOFF_LEN);
+
+	ret = ath12k_wmi_cmd_send(&wmi_ab->wmi[0],
+				  skb,
+				  WMI_PDEV_SET_BIOS_SAR_TABLE_CMDID);
+	if (ret) {
+		ath12k_warn(ab,
+			    "failed to send WMI_PDEV_SET_BIOS_INTERFACE_CMDID %d\n",
+			    ret);
+		dev_kfree_skb(skb);
+	}
+
+	return ret;
+}
+
+int ath12k_wmi_set_bios_geo_cmd(struct ath12k_base *ab, const u8 *pgeo_table)
+{
+	struct ath12k_wmi_base *wmi_ab = &ab->wmi_ab;
+	struct wmi_pdev_set_bios_geo_table_cmd *cmd;
+	struct wmi_tlv *tlv;
+	struct sk_buff *skb;
+	int ret;
+	u8 *buf_ptr;
+	u32 len, sar_geo_len_aligned;
+	const u8 *pgeo_value = pgeo_table + ATH12K_ACPI_GEO_OFFSET_DATA_OFFSET;
+
+	sar_geo_len_aligned = roundup(ATH12K_ACPI_BIOS_SAR_GEO_OFFSET_LEN, sizeof(u32));
+	len = sizeof(*cmd) + TLV_HDR_SIZE + sar_geo_len_aligned;
+
+	skb = ath12k_wmi_alloc_skb(wmi_ab, len);
+	if (!skb)
+		return -ENOMEM;
+
+	cmd = (struct wmi_pdev_set_bios_geo_table_cmd *)skb->data;
+	cmd->tlv_header = ath12k_wmi_tlv_cmd_hdr(WMI_TAG_PDEV_SET_BIOS_GEO_TABLE_CMD,
+						 sizeof(*cmd));
+	cmd->pdev_id = cpu_to_le32(WMI_PDEV_ID_SOC);
+	cmd->geo_len = cpu_to_le32(ATH12K_ACPI_BIOS_SAR_GEO_OFFSET_LEN);
+
+	buf_ptr = skb->data + sizeof(*cmd);
+	tlv = (struct wmi_tlv *)buf_ptr;
+	tlv->header = ath12k_wmi_tlv_hdr(WMI_TAG_ARRAY_BYTE, sar_geo_len_aligned);
+	buf_ptr += TLV_HDR_SIZE;
+	memcpy(buf_ptr, pgeo_value, ATH12K_ACPI_BIOS_SAR_GEO_OFFSET_LEN);
+
+	ret = ath12k_wmi_cmd_send(&wmi_ab->wmi[0],
+				  skb,
+				  WMI_PDEV_SET_BIOS_GEO_TABLE_CMDID);
+	if (ret) {
+		ath12k_warn(ab,
+			    "failed to send WMI_PDEV_SET_BIOS_GEO_TABLE_CMDID %d\n",
+			    ret);
+		dev_kfree_skb(skb);
+	}
+
+	return ret;
+}
+
 int ath12k_wmi_delba_send(struct ath12k *ar, u32 vdev_id, const u8 *mac,
 			  u32 tid, u32 initiator, u32 reason)
 {