LXR linux/drivers/vdpa/ifcvf/ifcvf

   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 <uapi/linux/virtio_net.h>
  18#include <uapi/linux/virtio_blk.h>
  19#include <uapi/linux/virtio_config.h>
  20#include <uapi/linux/virtio_pci.h>
  21
  22#define N3000_DEVICE_ID         0x1041
  23#define N3000_SUBSYS_DEVICE_ID  0x001A
  24
  25/* Max 8 data queue pairs(16 queues) and one control vq for now. */
  26#define IFCVF_MAX_QUEUES        17
  27
  28#define IFCVF_QUEUE_ALIGNMENT   PAGE_SIZE
  29#define IFCVF_QUEUE_MAX         32768
  30#define IFCVF_MSI_CONFIG_OFF    0
  31#define IFCVF_MSI_QUEUE_OFF     1
  32#define IFCVF_PCI_MAX_RESOURCE  6
  33
  34#define IFCVF_LM_CFG_SIZE               0x40
  35#define IFCVF_LM_RING_STATE_OFFSET      0x20
  36#define IFCVF_LM_BAR                    4
  37
  38#define IFCVF_ERR(pdev, fmt, ...)       dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
  39#define IFCVF_DBG(pdev, fmt, ...)       dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
  40#define IFCVF_INFO(pdev, fmt, ...)      dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
  41
  42#define ifcvf_private_to_vf(adapter) \
  43        (&((struct ifcvf_adapter *)adapter)->vf)
  44
  45struct vring_info {
  46        u64 desc;
  47        u64 avail;
  48        u64 used;
  49        u16 size;
  50        u16 last_avail_idx;
  51        bool ready;
  52        void __iomem *notify_addr;
  53        phys_addr_t notify_pa;
  54        u32 irq;
  55        struct vdpa_callback cb;
  56        char msix_name[256];
  57};
  58
  59struct ifcvf_hw {
  60        u8 __iomem *isr;
  61        /* Live migration */
  62        u8 __iomem *lm_cfg;
  63        u16 nr_vring;
  64        /* Notification bar number */
  65        u8 notify_bar;
  66        /* Notificaiton bar address */
  67        void __iomem *notify_base;
  68        phys_addr_t notify_base_pa;
  69        u32 notify_off_multiplier;
  70        u64 req_features;
  71        u64 hw_features;
  72        u32 dev_type;
  73        struct virtio_pci_common_cfg __iomem *common_cfg;
  74        void __iomem *net_cfg;
  75        struct vring_info vring[IFCVF_MAX_QUEUES];
  76        void __iomem * const *base;
  77        char config_msix_name[256];
  78        struct vdpa_callback config_cb;
  79        unsigned int config_irq;
  80};
  81
  82struct ifcvf_adapter {
  83        struct vdpa_device vdpa;
  84        struct pci_dev *pdev;
  85        struct ifcvf_hw vf;
  86};
  87
  88struct ifcvf_vring_lm_cfg {
  89        u32 idx_addr[2];
  90        u8 reserved[IFCVF_LM_CFG_SIZE - 8];
  91};
  92
  93struct ifcvf_lm_cfg {
  94        u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
  95        struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES];
  96};
  97
  98struct ifcvf_vdpa_mgmt_dev {
  99        struct vdpa_mgmt_dev mdev;
 100        struct ifcvf_adapter *adapter;
 101        struct pci_dev *pdev;
 102};
 103
 104int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
 105int ifcvf_start_hw(struct ifcvf_hw *hw);
 106void ifcvf_stop_hw(struct ifcvf_hw *hw);
 107void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
 108void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
 109                           void *dst, int length);
 110void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
 111                            const void *src, int length);
 112u8 ifcvf_get_status(struct ifcvf_hw *hw);
 113void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
 114void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
 115void ifcvf_reset(struct ifcvf_hw *hw);
 116u64 ifcvf_get_features(struct ifcvf_hw *hw);
 117u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
 118int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
 119u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 120int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
 121struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
 122int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
 123#endif /* _IFCVF_H_ */
 124