/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Intel IFC VF NIC driver for virtio dataplane offloading
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*
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* Copyright (C) 2020 Intel Corporation.
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*
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* Author: Zhu Lingshan <lingshan.zhu@intel.com>
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*
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*/
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#ifndef _IFCVF_H_
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#define _IFCVF_H_
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#include <linux/pci.h>
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#include <linux/pci_regs.h>
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#include <linux/vdpa.h>
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#include <uapi/linux/virtio_net.h>
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#include <uapi/linux/virtio_config.h>
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#include <uapi/linux/virtio_pci.h>
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#define IFCVF_VENDOR_ID 0x1AF4
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#define IFCVF_DEVICE_ID 0x1041
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#define IFCVF_SUBSYS_VENDOR_ID 0x8086
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#define IFCVF_SUBSYS_DEVICE_ID 0x001A
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#define IFCVF_SUPPORTED_FEATURES \
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((1ULL << VIRTIO_NET_F_MAC) | \
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(1ULL << VIRTIO_F_ANY_LAYOUT) | \
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(1ULL << VIRTIO_F_VERSION_1) | \
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(1ULL << VIRTIO_NET_F_STATUS) | \
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(1ULL << VIRTIO_F_ORDER_PLATFORM) | \
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(1ULL << VIRTIO_F_ACCESS_PLATFORM) | \
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(1ULL << VIRTIO_NET_F_MRG_RXBUF))
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/* Only one queue pair for now. */
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#define IFCVF_MAX_QUEUE_PAIRS 1
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#define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
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#define IFCVF_QUEUE_MAX 32768
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#define IFCVF_MSI_CONFIG_OFF 0
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#define IFCVF_MSI_QUEUE_OFF 1
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#define IFCVF_PCI_MAX_RESOURCE 6
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#define IFCVF_LM_CFG_SIZE 0x40
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#define IFCVF_LM_RING_STATE_OFFSET 0x20
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#define IFCVF_LM_BAR 4
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#define IFCVF_ERR(pdev, fmt, ...) dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
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#define IFCVF_DBG(pdev, fmt, ...) dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
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#define IFCVF_INFO(pdev, fmt, ...) dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
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#define ifcvf_private_to_vf(adapter) \
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(&((struct ifcvf_adapter *)adapter)->vf)
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#define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
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struct vring_info {
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u64 desc;
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u64 avail;
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u64 used;
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u16 size;
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u16 last_avail_idx;
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bool ready;
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void __iomem *notify_addr;
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u32 irq;
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struct vdpa_callback cb;
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char msix_name[256];
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};
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struct ifcvf_hw {
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u8 __iomem *isr;
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/* Live migration */
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u8 __iomem *lm_cfg;
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u16 nr_vring;
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/* Notification bar number */
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u8 notify_bar;
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/* Notificaiton bar address */
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void __iomem *notify_base;
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u32 notify_off_multiplier;
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u64 req_features;
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struct virtio_pci_common_cfg __iomem *common_cfg;
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void __iomem *net_cfg;
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struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
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void __iomem * const *base;
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char config_msix_name[256];
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struct vdpa_callback config_cb;
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unsigned int config_irq;
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};
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struct ifcvf_adapter {
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struct vdpa_device vdpa;
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struct pci_dev *pdev;
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struct ifcvf_hw vf;
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};
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struct ifcvf_vring_lm_cfg {
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u32 idx_addr[2];
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u8 reserved[IFCVF_LM_CFG_SIZE - 8];
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};
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struct ifcvf_lm_cfg {
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u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
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struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
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};
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int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
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int ifcvf_start_hw(struct ifcvf_hw *hw);
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void ifcvf_stop_hw(struct ifcvf_hw *hw);
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void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
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void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
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void *dst, int length);
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void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
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const void *src, int length);
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u8 ifcvf_get_status(struct ifcvf_hw *hw);
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void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
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void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
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void ifcvf_reset(struct ifcvf_hw *hw);
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u64 ifcvf_get_features(struct ifcvf_hw *hw);
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u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
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int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
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struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
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#endif /* _IFCVF_H_ */
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