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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* ZTE DingHai Ethernet driver - PCI capability definitions
* Copyright (c) 2022-2026, ZTE Corporation.
*/
#ifndef __DH_QUEUE_H__
#define __DH_QUEUE_H__
#include <linux/types.h>
/* This is the PCI capability header: */
struct zxdh_pf_pci_cap {
__u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
__u8 cap_next; /* Generic PCI field: next ptr. */
__u8 cap_len; /* Generic PCI field: capability length */
__u8 cfg_type; /* Identifies the structure. */
__u8 bar; /* Where to find it. */
__u8 id; /* Multiple capabilities of the same type */
__u8 padding[2]; /* Pad to full dword. */
__le32 offset; /* Offset within bar. */
__le32 length; /* Length of the structure, in bytes. */
};
/* Fields in ZXDH_PF_PCI_CAP_COMMON_CFG: */
struct zxdh_pf_pci_common_cfg {
/* About the whole device. */
__le32 device_feature_select; /* read-write */
__le32 device_feature; /* read-only */
__le32 guest_feature_select; /* read-write */
__le32 guest_feature; /* read-write */
__le16 msix_config; /* read-write */
__le16 num_queues; /* read-only */
__u8 device_status; /* read-write */
__u8 config_generation; /* read-only */
/* About a specific virtqueue. */
__le16 queue_select; /* read-write */
__le16 queue_size; /* read-write, power of 2. */
__le16 queue_msix_vector; /* read-write */
__le16 queue_enable; /* read-write */
__le16 queue_notify_off; /* read-only */
__le32 queue_desc_lo; /* read-write */
__le32 queue_desc_hi; /* read-write */
__le32 queue_avail_lo; /* read-write */
__le32 queue_avail_hi; /* read-write */
__le32 queue_used_lo; /* read-write */
__le32 queue_used_hi; /* read-write */
};
struct zxdh_pf_pci_notify_cap {
struct zxdh_pf_pci_cap cap;
__le32 notify_off_multiplier; /* Multiplier for queue_notify_off. */
};
#endif /* __DH_QUEUE_H__ */
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