1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Intel IFC VF NIC driver for virtio dataplane offloading
  4 *
  5 * Copyright (C) 2020 Intel Corporation.
  6 *
  7 * Author: Zhu Lingshan <lingshan.zhu@intel.com>
  8 *
  9 */
 10
 11#ifndef _IFCVF_H_
 12#define _IFCVF_H_
 13
 14#include <linux/pci.h>
 15#include <linux/pci_regs.h>
 16#include <linux/vdpa.h>
 17#include <linux/virtio_pci_modern.h>
 18#include <uapi/linux/virtio_net.h>
 19#include <uapi/linux/virtio_blk.h>
 20#include <uapi/linux/virtio_config.h>
 21#include <uapi/linux/virtio_pci.h>
 22#include <uapi/linux/vdpa.h>
 23
 24#define N3000_DEVICE_ID		0x1041
 25#define N3000_SUBSYS_DEVICE_ID	0x001A
 26
 27#define IFCVF_QUEUE_ALIGNMENT	PAGE_SIZE
 28#define IFCVF_PCI_MAX_RESOURCE	6
 29
 30#define IFCVF_LM_BAR			4
 31#define IFCVF_MIN_VQ_SIZE		64
 32
 33#define IFCVF_ERR(pdev, fmt, ...)	dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
 34#define IFCVF_DBG(pdev, fmt, ...)	dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
 35#define IFCVF_INFO(pdev, fmt, ...)	dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
 36
 37/* all vqs and config interrupt has its own vector */
 38#define MSIX_VECTOR_PER_VQ_AND_CONFIG		1
 39/* all vqs share a vector, and config interrupt has a separate vector */
 40#define MSIX_VECTOR_SHARED_VQ_AND_CONFIG	2
 41/* all vqs and config interrupt share a vector */
 42#define MSIX_VECTOR_DEV_SHARED			3
 43
 44struct vring_info {
 45	u16 last_avail_idx;
 46	void __iomem *notify_addr;
 47	phys_addr_t notify_pa;
 48	u32 irq;
 49	struct vdpa_callback cb;
 50	char msix_name[256];
 51};
 52
 53struct ifcvf_lm_cfg {
 54	__le64 control;
 55	__le64 status;
 56	__le64 lm_mem_log_start_addr;
 57	__le64 lm_mem_log_end_addr;
 58	__le16 vq_state_region;
 59};
 60
 61struct ifcvf_hw {
 62	u8 __iomem *isr;
 63	/* Live migration */
 64	struct ifcvf_lm_cfg  __iomem *lm_cfg;
 65	/* Notification bar number */
 66	u8 notify_bar;
 67	u8 msix_vector_status;
 68	/* virtio-net or virtio-blk device config size */
 69	u32 config_size;
 70	/* Notificaiton bar address */
 71	void __iomem *notify_base;
 72	phys_addr_t notify_base_pa;
 73	u32 notify_off_multiplier;
 74	u32 dev_type;
 75	u64 hw_features;
 76	/* provisioned device features */
 77	u64 dev_features;
 78	struct virtio_pci_common_cfg __iomem *common_cfg;
 79	void __iomem *dev_cfg;
 80	struct vring_info *vring;
 81	void __iomem * const *base;
 82	char config_msix_name[256];
 83	struct vdpa_callback config_cb;
 84	int config_irq;
 85	int vqs_reused_irq;
 86	u16 nr_vring;
 87	/* VIRTIO_PCI_CAP_DEVICE_CFG size */
 88	u32 num_msix_vectors;
 89	u32 cap_dev_config_size;
 90	struct pci_dev *pdev;
 91};
 92
 93struct ifcvf_adapter {
 94	struct vdpa_device vdpa;
 95	struct pci_dev *pdev;
 96	struct ifcvf_hw *vf;
 97};
 98
 99struct ifcvf_vdpa_mgmt_dev {
100	struct vdpa_mgmt_dev mdev;
101	struct ifcvf_hw vf;
102	struct ifcvf_adapter *adapter;
103	struct pci_dev *pdev;
104};
105
106int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
107void ifcvf_stop(struct ifcvf_hw *hw);
108void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
109void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset,
110			   void *dst, int length);
111void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset,
112			    const void *src, int length);
113u8 ifcvf_get_status(struct ifcvf_hw *hw);
114void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
115void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
116void ifcvf_reset(struct ifcvf_hw *hw);
117u64 ifcvf_get_dev_features(struct ifcvf_hw *hw);
118u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
119int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
120u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
121int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
122struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
123int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
124u32 ifcvf_get_config_size(struct ifcvf_hw *hw);
125u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector);
126u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector);
127void ifcvf_set_vq_num(struct ifcvf_hw *hw, u16 qid, u32 num);
128int ifcvf_set_vq_address(struct ifcvf_hw *hw, u16 qid, u64 desc_area,
129			 u64 driver_area, u64 device_area);
130bool ifcvf_get_vq_ready(struct ifcvf_hw *hw, u16 qid);
131void ifcvf_set_vq_ready(struct ifcvf_hw *hw, u16 qid, bool ready);
132void ifcvf_set_driver_features(struct ifcvf_hw *hw, u64 features);
133u64 ifcvf_get_driver_features(struct ifcvf_hw *hw);
134u16 ifcvf_get_max_vq_size(struct ifcvf_hw *hw);
135u16 ifcvf_get_vq_size(struct ifcvf_hw *hw, u16 qid);
136#endif /* _IFCVF_H_ */