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