path: root/drivers/net/wireless/ath/ath10k/qmi.c

// SPDX-License-Identifier: ISC
/*
 * Copyright (c) 2018 The Linux Foundation. All rights reserved.
 * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
 */

#include <linux/completion.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/idr.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/module.h>
#include <linux/net.h>
#include <linux/platform_device.h>
#include <linux/firmware/qcom/qcom_scm.h>
#include <linux/soc/qcom/smem.h>
#include <linux/string.h>
#include <net/sock.h>

#include "debug.h"
#include "snoc.h"

#define ATH10K_QMI_CLIENT_ID		0x4b4e454c
#define ATH10K_QMI_TIMEOUT		30
#define SMEM_IMAGE_VERSION_TABLE       469
#define SMEM_IMAGE_TABLE_CNSS_INDEX     13
#define SMEM_IMAGE_VERSION_ENTRY_SIZE	128
#define SMEM_IMAGE_VERSION_NAME_SIZE	75

static int ath10k_qmi_map_msa_permission(struct ath10k_qmi *qmi,
					 struct ath10k_msa_mem_info *mem_info)
{
	struct qcom_scm_vmperm dst_perms[3];
	struct ath10k *ar = qmi->ar;
	u64 src_perms;
	u32 perm_count;
	int ret;

	src_perms = BIT(QCOM_SCM_VMID_HLOS);

	dst_perms[0].vmid = QCOM_SCM_VMID_MSS_MSA;
	dst_perms[0].perm = QCOM_SCM_PERM_RW;
	dst_perms[1].vmid = QCOM_SCM_VMID_WLAN;
	dst_perms[1].perm = QCOM_SCM_PERM_RW;

	if (mem_info->secure) {
		perm_count = 2;
	} else {
		dst_perms[2].vmid = QCOM_SCM_VMID_WLAN_CE;
		dst_perms[2].perm = QCOM_SCM_PERM_RW;
		perm_count = 3;
	}

	ret = qcom_scm_assign_mem(mem_info->addr, mem_info->size,
				  &src_perms, dst_perms, perm_count);
	if (ret < 0)
		ath10k_err(ar, "failed to assign msa map permissions: %d\n", ret);

	return ret;
}

static int ath10k_qmi_unmap_msa_permission(struct ath10k_qmi *qmi,
					   struct ath10k_msa_mem_info *mem_info)
{
	struct qcom_scm_vmperm dst_perms;
	struct ath10k *ar = qmi->ar;
	u64 src_perms;
	int ret;

	src_perms = BIT(QCOM_SCM_VMID_MSS_MSA) | BIT(QCOM_SCM_VMID_WLAN);

	if (!mem_info->secure)
		src_perms |= BIT(QCOM_SCM_VMID_WLAN_CE);

	dst_perms.vmid = QCOM_SCM_VMID_HLOS;
	dst_perms.perm = QCOM_SCM_PERM_RW;

	ret = qcom_scm_assign_mem(mem_info->addr, mem_info->size,
				  &src_perms, &dst_perms, 1);
	if (ret < 0)
		ath10k_err(ar, "failed to unmap msa permissions: %d\n", ret);

	return ret;
}

static int ath10k_qmi_setup_msa_permissions(struct ath10k_qmi *qmi)
{
	int ret;
	int i;

	if (qmi->msa_fixed_perm)
		return 0;

	for (i = 0; i < qmi->nr_mem_region; i++) {
		ret = ath10k_qmi_map_msa_permission(qmi, &qmi->mem_region[i]);
		if (ret)
			goto err_unmap;
	}

	return 0;

err_unmap:
	for (i--; i >= 0; i--)
		ath10k_qmi_unmap_msa_permission(qmi, &qmi->mem_region[i]);
	return ret;
}

static void ath10k_qmi_remove_msa_permission(struct ath10k_qmi *qmi)
{
	int i;

	if (qmi->msa_fixed_perm)
		return;

	for (i = 0; i < qmi->nr_mem_region; i++)
		ath10k_qmi_unmap_msa_permission(qmi, &qmi->mem_region[i]);
}

static int ath10k_qmi_msa_mem_info_send_sync_msg(struct ath10k_qmi *qmi)
{
	struct wlfw_msa_info_resp_msg_v01 resp = {};
	struct wlfw_msa_info_req_msg_v01 req = {};
	struct ath10k *ar = qmi->ar;
	phys_addr_t max_mapped_addr;
	struct qmi_txn txn;
	int ret;
	int i;

	req.msa_addr = ar->msa.paddr;
	req.size = ar->msa.mem_size;

	ret = qmi_txn_init(&qmi->qmi_hdl, &txn,
			   wlfw_msa_info_resp_msg_v01_ei, &resp);
	if (ret < 0)
		goto out;

	ret = qmi_send_request(&qmi->qmi_hdl, NULL, &txn,
			       QMI_WLFW_MSA_INFO_REQ_V01,
			       WLFW_MSA_INFO_REQ_MSG_V01_MAX_MSG_LEN,
			       wlfw_msa_info_req_msg_v01_ei, &req);
	if (ret < 0) {
		qmi_txn_cancel(&txn);
		ath10k_err(ar, "failed to send msa mem info req: %d\n", ret);
		goto