drivers/vdpa/ifcvf/ifcvf_base.h

   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_config.h>
  19 #include <uapi/linux/virtio_pci.h>
  20
  21 #define IFCVF_VENDOR_ID         0x1AF4
  22 #define IFCVF_DEVICE_ID         0x1041
  23 #define IFCVF_SUBSYS_VENDOR_ID  0x8086
  24 #define IFCVF_SUBSYS_DEVICE_ID  0x001A
  25
  26 #define IFCVF_SUPPORTED_FEATURES \
  27                 ((1ULL << VIRTIO_NET_F_MAC)                     | \
  28                  (1ULL << VIRTIO_F_ANY_LAYOUT)                  | \
  29                  (1ULL << VIRTIO_F_VERSION_1)                   | \
  30                  (1ULL << VIRTIO_NET_F_STATUS)                  | \
  31                  (1ULL << VIRTIO_F_ORDER_PLATFORM)              | \
  32                  (1ULL << VIRTIO_F_IOMMU_PLATFORM)              | \
  33                  (1ULL << VIRTIO_NET_F_MRG_RXBUF))
  34
  35 /* Only one queue pair for now. */
  36 #define IFCVF_MAX_QUEUE_PAIRS   1
  37
  38 #define IFCVF_QUEUE_ALIGNMENT   PAGE_SIZE
  39 #define IFCVF_QUEUE_MAX         32768
  40 #define IFCVF_MSI_CONFIG_OFF    0
  41 #define IFCVF_MSI_QUEUE_OFF     1
  42 #define IFCVF_PCI_MAX_RESOURCE  6
  43
  44 #define IFCVF_LM_CFG_SIZE               0x40
  45 #define IFCVF_LM_RING_STATE_OFFSET      0x20
  46 #define IFCVF_LM_BAR                    4
  47
  48 #define IFCVF_ERR(pdev, fmt, ...)       dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
  49 #define IFCVF_DBG(pdev, fmt, ...)       dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
  50 #define IFCVF_INFO(pdev, fmt, ...)      dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
  51
  52 #define ifcvf_private_to_vf(adapter) \
  53         (&((struct ifcvf_adapter *)adapter)->vf)
  54
  55 #define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
  56
  57 struct vring_info {
  58         u64 desc;
  59         u64 avail;
  60         u64 used;
  61         u16 size;
  62         u16 last_avail_idx;
  63         bool ready;
  64         void __iomem *notify_addr;
  65         u32 irq;
  66         struct vdpa_callback cb;
  67         char msix_name[256];
  68 };
  69
  70 struct 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         u32 notify_off_multiplier;
  80         u64 req_features;
  81         struct virtio_pci_common_cfg __iomem *common_cfg;
  82         void __iomem *net_cfg;
  83         struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
  84         void __iomem * const *base;
  85         char config_msix_name[256];
  86         struct vdpa_callback config_cb;
  87
  88 };
  89
  90 struct ifcvf_adapter {
  91         struct vdpa_device vdpa;
  92         struct pci_dev *pdev;
  93         struct ifcvf_hw vf;
  94 };
  95
  96 struct ifcvf_vring_lm_cfg {
  97         u32 idx_addr[2];
  98         u8 reserved[IFCVF_LM_CFG_SIZE - 8];
  99 };
 100
 101 struct ifcvf_lm_cfg {
 102         u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
 103         struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
 104 };
 105
 106 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
 107 int ifcvf_start_hw(struct ifcvf_hw *hw);
 108 void ifcvf_stop_hw(struct ifcvf_hw *hw);
 109 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
 110 void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
 111                            void *dst, int length);
 112 void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
 113                             const void *src, int length);
 114 u8 ifcvf_get_status(struct ifcvf_hw *hw);
 115 void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
 116 void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
 117 void ifcvf_reset(struct ifcvf_hw *hw);
 118 u64 ifcvf_get_features(struct ifcvf_hw *hw);
 119 u64 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 120 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u64 num);
 121 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
 122 #endif /* _IFCVF_H_ */