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19df707eee
Implement PCI configuration space access, BAR mapping, capability scanning (common/notify/device), and hardware queue register definitions for DingHai PF device. Signed-off-by: Junyang Han <han.junyang@zte.com.cn> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* ZTE DingHai Ethernet driver - PCI capability definitions
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* Copyright (c) 2022-2026, ZTE Corporation.
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*/
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#ifndef __DH_QUEUE_H__
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#define __DH_QUEUE_H__
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#include <linux/types.h>
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/* This is the PCI capability header: */
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struct zxdh_pf_pci_cap {
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__u8 cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
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__u8 cap_next; /* Generic PCI field: next ptr. */
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__u8 cap_len; /* Generic PCI field: capability length */
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__u8 cfg_type; /* Identifies the structure. */
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__u8 bar; /* Where to find it. */
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__u8 id; /* Multiple capabilities of the same type */
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__u8 padding[2]; /* Pad to full dword. */
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__le32 offset; /* Offset within bar. */
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__le32 length; /* Length of the structure, in bytes. */
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};
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/* Fields in ZXDH_PF_PCI_CAP_COMMON_CFG: */
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struct zxdh_pf_pci_common_cfg {
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/* About the whole device. */
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__le32 device_feature_select; /* read-write */
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__le32 device_feature; /* read-only */
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__le32 guest_feature_select; /* read-write */
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__le32 guest_feature; /* read-write */
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__le16 msix_config; /* read-write */
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__le16 num_queues; /* read-only */
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__u8 device_status; /* read-write */
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__u8 config_generation; /* read-only */
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/* About a specific virtqueue. */
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__le16 queue_select; /* read-write */
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__le16 queue_size; /* read-write, power of 2. */
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__le16 queue_msix_vector; /* read-write */
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__le16 queue_enable; /* read-write */
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__le16 queue_notify_off; /* read-only */
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__le32 queue_desc_lo; /* read-write */
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__le32 queue_desc_hi; /* read-write */
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__le32 queue_avail_lo; /* read-write */
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__le32 queue_avail_hi; /* read-write */
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__le32 queue_used_lo; /* read-write */
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__le32 queue_used_hi; /* read-write */
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};
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struct zxdh_pf_pci_notify_cap {
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struct zxdh_pf_pci_cap cap;
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__le32 notify_off_multiplier; /* Multiplier for queue_notify_off. */
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};
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#endif /* __DH_QUEUE_H__ */
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