118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2018-2021, Intel Corporation. */
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#ifndef _ICE_VDCM_H_
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#define _ICE_VDCM_H_
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#include "ice.h"
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#include <linux/uuid.h>
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#if IS_ENABLED(CONFIG_VFIO_MDEV)
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#include <linux/mdev.h>
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#endif /* CONFIG_VFIO_MDEV */
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#include <linux/vfio.h>
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#include <linux/iommu.h>
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#if IS_ENABLED(CONFIG_IRQ_BYPASS_MANAGER)
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#include <linux/irqbypass.h>
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#endif /* CONFIG_IRQ_BYPASS_MANAGER */
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#define ICE_VDCM_CFG_SIZE 256
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#define ICE_VDCM_BAR0_SIZE SZ_64M
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struct ice_vdcm_irq_ctx {
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struct eventfd_ctx *trigger;
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char *name;
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unsigned int irq;
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#if IS_ENABLED(CONFIG_IRQ_BYPASS_MANAGER)
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struct irq_bypass_producer producer;
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#endif /* CONFIG_IRQ_BYPASS_MANAGER */
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};
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/**
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* struct ice_vdcm - The abstraction for VDCM
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*
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* @dev: linux device for this VDCM
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* @parent_dev: linux parent device for this VDCM
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* @vfio_group: vfio group for this device
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* @pci_cfg_space: PCI configuration space buffer
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* @vma_lock: protects access to vma_list
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* @vma_list: linked list for VMA
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* @ctx: IRQ context
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* @num_ctx: number of requested IRQ context
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* @irq_type: IRQ type
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* @adi: ADI attribute
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*/
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struct ice_vdcm {
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/* Common attribute */
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struct device *dev;
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struct device *parent_dev;
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struct vfio_group *vfio_group;
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u8 pci_cfg_space[ICE_VDCM_CFG_SIZE];
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struct mutex vma_lock; /* protects access to vma_list */
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struct list_head vma_list;
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/* IRQ context */
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struct ice_vdcm_irq_ctx *ctx;
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unsigned int num_ctx;
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unsigned int irq_type;
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/* Device Specific */
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struct ice_adi *adi;
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};
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/**
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* struct ice_adi - Assignable Device Interface attribute
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*
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* This structure defines the device specific resource and callbacks
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*
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* It is expected to be embedded in a private container structure allocated by
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* the driver. Use container_of to get the private structure pointer back from
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* a pointer to the ice_adi structure.
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*
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* @get_vector_num: get number of vectors assigned to this ADI
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* @get_vector_irq: get OS IRQ number per vector
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* @reset: This function is called when VDCM wants to reset ADI
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* @cfg_pasid: This function is called when VDCM wants to configure ADI's PASID
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* @close: This function is called when VDCM wants to close ADI
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* @read_reg32: This function is called when VDCM wants to read ADI register
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* @write_reg32: This function is called when VDCM wants to write ADI register
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* @get_sparse_mmap_hpa: This function is called when VDCM wants to get ADI HPA
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* @get_sparse_mmap_num: This function is called when VDCM wants to get
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* the number of sparse memory areas
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* @get_sparse_mmap_area: This function is called when VDCM wants to get
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* layout of sparse memory
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*/
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struct ice_adi {
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int (*get_vector_num)(struct ice_adi *adi);
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int (*get_vector_irq)(struct ice_adi *adi, u32 vector);
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int (*reset)(struct ice_adi *adi);
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int (*cfg_pasid)(struct ice_adi *adi, u32 pasid, bool ena);
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int (*close)(struct ice_adi *adi);
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u32 (*read_reg32)(struct ice_adi *adi, size_t offs);
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void (*write_reg32)(struct ice_adi *adi, size_t offs, u32 val);
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int (*get_sparse_mmap_hpa)(struct ice_adi *adi, u32 index, u64 pg_off,
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u64 *addr);
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int (*get_sparse_mmap_num)(struct ice_adi *adi);
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int (*get_sparse_mmap_area)(struct ice_adi *adi, int index,
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u64 *offset, u64 *size);
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};
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#if IS_ENABLED(CONFIG_VFIO_MDEV) && defined(HAVE_PASID_SUPPORT)
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struct ice_adi *ice_vdcm_alloc_adi(struct device *dev, void *token);
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void ice_vdcm_free_adi(struct ice_adi *adi);
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void ice_vdcm_pre_rebuild_irqctx(void *token);
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int ice_vdcm_rebuild_irqctx(void *token);
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int ice_vdcm_zap(void *token);
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int ice_vdcm_init(struct pci_dev *pdev);
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void ice_vdcm_deinit(struct pci_dev *pdev);
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#else
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static inline int ice_vdcm_init(struct pci_dev *pdev)
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{
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return 0;
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}
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static inline void ice_vdcm_deinit(struct pci_dev *pdev) { }
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#endif /* CONFIG_VFIO_MDEV && HAVE_PASID_SUPPORT */
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#endif /* _ICE_VDCM_H_ */
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