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107 lines
2.6 KiB
107 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (c) 2020, Red Hat Inc. All rights reserved. |
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*/ |
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#ifndef _VDPA_SIM_H |
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#define _VDPA_SIM_H |
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#include <linux/vringh.h> |
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#include <linux/vdpa.h> |
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#include <linux/virtio_byteorder.h> |
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#include <linux/vhost_iotlb.h> |
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#include <uapi/linux/virtio_config.h> |
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#define VDPASIM_FEATURES ((1ULL << VIRTIO_F_ANY_LAYOUT) | \ |
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(1ULL << VIRTIO_F_VERSION_1) | \ |
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(1ULL << VIRTIO_F_ACCESS_PLATFORM)) |
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struct vdpasim; |
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struct vdpasim_virtqueue { |
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struct vringh vring; |
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struct vringh_kiov in_iov; |
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struct vringh_kiov out_iov; |
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unsigned short head; |
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bool ready; |
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u64 desc_addr; |
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u64 device_addr; |
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u64 driver_addr; |
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u32 num; |
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void *private; |
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irqreturn_t (*cb)(void *data); |
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}; |
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struct vdpasim_dev_attr { |
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struct vdpa_mgmt_dev *mgmt_dev; |
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const char *name; |
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u64 supported_features; |
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size_t config_size; |
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size_t buffer_size; |
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int nvqs; |
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u32 id; |
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work_func_t work_fn; |
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void (*get_config)(struct vdpasim *vdpasim, void *config); |
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void (*set_config)(struct vdpasim *vdpasim, const void *config); |
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}; |
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/* State of each vdpasim device */ |
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struct vdpasim { |
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struct vdpa_device vdpa; |
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struct vdpasim_virtqueue *vqs; |
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struct work_struct work; |
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struct vdpasim_dev_attr dev_attr; |
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/* spinlock to synchronize virtqueue state */ |
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spinlock_t lock; |
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/* virtio config according to device type */ |
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void *config; |
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struct vhost_iotlb *iommu; |
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void *buffer; |
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u32 status; |
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u32 generation; |
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u64 features; |
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/* spinlock to synchronize iommu table */ |
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spinlock_t iommu_lock; |
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}; |
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struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *attr); |
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/* TODO: cross-endian support */ |
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static inline bool vdpasim_is_little_endian(struct vdpasim *vdpasim) |
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{ |
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return virtio_legacy_is_little_endian() || |
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(vdpasim->features & (1ULL << VIRTIO_F_VERSION_1)); |
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} |
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static inline u16 vdpasim16_to_cpu(struct vdpasim *vdpasim, __virtio16 val) |
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{ |
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return __virtio16_to_cpu(vdpasim_is_little_endian(vdpasim), val); |
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} |
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static inline __virtio16 cpu_to_vdpasim16(struct vdpasim *vdpasim, u16 val) |
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{ |
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return __cpu_to_virtio16(vdpasim_is_little_endian(vdpasim), val); |
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} |
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static inline u32 vdpasim32_to_cpu(struct vdpasim *vdpasim, __virtio32 val) |
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{ |
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return __virtio32_to_cpu(vdpasim_is_little_endian(vdpasim), val); |
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} |
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static inline __virtio32 cpu_to_vdpasim32(struct vdpasim *vdpasim, u32 val) |
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{ |
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return __cpu_to_virtio32(vdpasim_is_little_endian(vdpasim), val); |
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} |
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static inline u64 vdpasim64_to_cpu(struct vdpasim *vdpasim, __virtio64 val) |
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{ |
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return __virtio64_to_cpu(vdpasim_is_little_endian(vdpasim), val); |
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} |
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static inline __virtio64 cpu_to_vdpasim64(struct vdpasim *vdpasim, u64 val) |
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{ |
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return __cpu_to_virtio64(vdpasim_is_little_endian(vdpasim), val); |
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} |
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#endif
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