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#define IFCVF_NET_SUPPORTED_FEATURES \
  26                ((1ULL << VIRTIO_NET_F_MAC)                     | \
  27                 (1ULL << VIRTIO_F_ANY_LAYOUT)                  | \
  28                 (1ULL << VIRTIO_F_VERSION_1)                   | \
  29                 (1ULL << VIRTIO_NET_F_STATUS)                  | \
  30                 (1ULL << VIRTIO_F_ORDER_PLATFORM)              | \
  31                 (1ULL << VIRTIO_F_ACCESS_PLATFORM)             | \
  32                 (1ULL << VIRTIO_NET_F_MRG_RXBUF))
  33
  34/* Only one queue pair for now. */
  35#define IFCVF_MAX_QUEUE_PAIRS   1
  36
  37#define IFCVF_QUEUE_ALIGNMENT   PAGE_SIZE
  38#define IFCVF_QUEUE_MAX         32768
  39#define IFCVF_MSI_CONFIG_OFF    0
  40#define IFCVF_MSI_QUEUE_OFF     1
  41#define IFCVF_PCI_MAX_RESOURCE  6
  42
  43#define IFCVF_LM_CFG_SIZE               0x40
  44#define IFCVF_LM_RING_STATE_OFFSET      0x20
  45#define IFCVF_LM_BAR                    4
  46
  47#define IFCVF_ERR(pdev, fmt, ...)       dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
  48#define IFCVF_DBG(pdev, fmt, ...)       dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
  49#define IFCVF_INFO(pdev, fmt, ...)      dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
  50
  51#define ifcvf_private_to_vf(adapter) \
  52        (&((struct ifcvf_adapter *)adapter)->vf)
  53
  54#define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
  55
  56struct vring_info {
  57        u64 desc;
  58        u64 avail;
  59        u64 used;
  60        u16 size;
  61        u16 last_avail_idx;
  62        bool ready;
  63        void __iomem *notify_addr;
  64        phys_addr_t notify_pa;
  65        u32 irq;
  66        struct vdpa_callback cb;
  67        char msix_name[256];
  68};
  69
  70struct ifcvf_hw {
  71        u8 __iomem *isr;
  72        /* Live migration */
  73        u8 __iomem *lm_cfg;
  74        u16 nr_vring;
  75        /* Notification bar number */
  76        u8 notify_bar;
  77        /* Notificaiton bar address */
  78        void __iomem *notify_base;
  79        phys_addr_t notify_base_pa;
  80        u32 notify_off_multiplier;
  81        u64 req_features;
  82        u64 hw_features;
  83        u32 dev_type;
  84        struct virtio_pci_common_cfg __iomem *common_cfg;
  85        void __iomem *net_cfg;
  86        struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
  87        void __iomem * const *base;
  88        char config_msix_name[256];
  89        struct vdpa_callback config_cb;
  90        unsigned int config_irq;
  91};
  92
  93struct ifcvf_adapter {
  94        struct vdpa_device vdpa;
  95        struct pci_dev *pdev;
  96        struct ifcvf_hw vf;
  97};
  98
  99struct ifcvf_vring_lm_cfg {
 100        u32 idx_addr[2];
 101        u8 reserved[IFCVF_LM_CFG_SIZE - 8];
 102};
 103
 104struct ifcvf_lm_cfg {
 105        u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
 106        struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
 107};
 108
 109int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
 110int ifcvf_start_hw(struct ifcvf_hw *hw);
 111void ifcvf_stop_hw(struct ifcvf_hw *hw);
 112void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
 113void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
 114                           void *dst, int length);
 115void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
 116                            const void *src, int length);
 117u8 ifcvf_get_status(struct ifcvf_hw *hw);
 118void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
 119void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
 120void ifcvf_reset(struct ifcvf_hw *hw);
 121u64 ifcvf_get_features(struct ifcvf_hw *hw);
 122u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
 123int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
 124u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 125int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
 126struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
 127int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
 128#endif /* _IFCVF_H_ */
 129