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 <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
  44 struct 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
  53 struct 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
  61 struct 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
  93 struct ifcvf_adapter {
  94         struct vdpa_device vdpa;
  95         struct pci_dev *pdev;
  96         struct ifcvf_hw *vf;
  97 };
  98
  99 struct 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
 106 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
 107 void ifcvf_stop(struct ifcvf_hw *hw);
 108 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
 109 void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset,
 110                            void *dst, int length);
 111 void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset,
 112                             const void *src, int length);
 113 u8 ifcvf_get_status(struct ifcvf_hw *hw);
 114 void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
 115 void ifcvf_reset(struct ifcvf_hw *hw);
 116 u64 ifcvf_get_dev_features(struct ifcvf_hw *hw);
 117 u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
 118 int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
 119 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
 120 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
 121 u32 ifcvf_get_config_size(struct ifcvf_hw *hw);
 122 u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector);
 123 u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector);
 124 void ifcvf_set_vq_num(struct ifcvf_hw *hw, u16 qid, u32 num);
 125 int ifcvf_set_vq_address(struct ifcvf_hw *hw, u16 qid, u64 desc_area,
 126                          u64 driver_area, u64 device_area);
 127 bool ifcvf_get_vq_ready(struct ifcvf_hw *hw, u16 qid);
 128 void ifcvf_set_vq_ready(struct ifcvf_hw *hw, u16 qid, bool ready);
 129 void ifcvf_set_driver_features(struct ifcvf_hw *hw, u64 features);
 130 u64 ifcvf_get_driver_features(struct ifcvf_hw *hw);
 131 u16 ifcvf_get_max_vq_size(struct ifcvf_hw *hw);
 132 u16 ifcvf_get_vq_size(struct ifcvf_hw *hw, u16 qid);
 133 #endif /* _IFCVF_H_ */