254 lines
8.2 KiB
C
254 lines
8.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2018 HUAWEI TECHNOLOGIES CO., LTD.
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*/
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#ifndef _VIRTIO_PCI_H_
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#define _VIRTIO_PCI_H_
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#include <stdint.h>
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#include <rte_pci.h>
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#include <rte_bus_pci.h>
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#include <rte_cryptodev.h>
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#include "virtio_crypto.h"
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struct virtqueue;
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/* VirtIO PCI vendor/device ID. */
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#define VIRTIO_CRYPTO_PCI_VENDORID 0x1AF4
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#define VIRTIO_CRYPTO_PCI_DEVICEID 0x1054
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/* VirtIO ABI version, this must match exactly. */
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#define VIRTIO_PCI_ABI_VERSION 0
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/*
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* VirtIO Header, located in BAR 0.
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*/
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#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
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#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
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#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
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#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
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#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
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#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
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#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
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#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
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* also clears the register (8, RO)
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*/
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/* Only if MSIX is enabled: */
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/* configuration change vector (16, RW) */
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#define VIRTIO_MSI_CONFIG_VECTOR 20
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/* vector for selected VQ notifications */
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#define VIRTIO_MSI_QUEUE_VECTOR 22
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/* The bit of the ISR which indicates a device has an interrupt. */
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#define VIRTIO_PCI_ISR_INTR 0x1
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/* The bit of the ISR which indicates a device configuration change. */
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#define VIRTIO_PCI_ISR_CONFIG 0x2
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/* Vector value used to disable MSI for queue. */
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#define VIRTIO_MSI_NO_VECTOR 0xFFFF
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/* Status byte for guest to report progress. */
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#define VIRTIO_CONFIG_STATUS_RESET 0x00
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#define VIRTIO_CONFIG_STATUS_ACK 0x01
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#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
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#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
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#define VIRTIO_CONFIG_STATUS_FEATURES_OK 0x08
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#define VIRTIO_CONFIG_STATUS_FAILED 0x80
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/*
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* Each virtqueue indirect descriptor list must be physically contiguous.
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* To allow us to malloc(9) each list individually, limit the number
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* supported to what will fit in one page. With 4KB pages, this is a limit
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* of 256 descriptors. If there is ever a need for more, we can switch to
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* contigmalloc(9) for the larger allocations, similar to what
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* bus_dmamem_alloc(9) does.
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*
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* Note the sizeof(struct vring_desc) is 16 bytes.
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*/
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#define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16))
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/* Do we get callbacks when the ring is completely used, even if we've
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* suppressed them?
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*/
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#define VIRTIO_F_NOTIFY_ON_EMPTY 24
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/* Can the device handle any descriptor layout? */
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#define VIRTIO_F_ANY_LAYOUT 27
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/* We support indirect buffer descriptors */
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#define VIRTIO_RING_F_INDIRECT_DESC 28
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#define VIRTIO_F_VERSION_1 32
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#define VIRTIO_F_IOMMU_PLATFORM 33
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/* The Guest publishes the used index for which it expects an interrupt
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* at the end of the avail ring. Host should ignore the avail->flags field.
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*/
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/* The Host publishes the avail index for which it expects a kick
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* at the end of the used ring. Guest should ignore the used->flags field.
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*/
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#define VIRTIO_RING_F_EVENT_IDX 29
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/* Common configuration */
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#define VIRTIO_PCI_CAP_COMMON_CFG 1
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/* Notifications */
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#define VIRTIO_PCI_CAP_NOTIFY_CFG 2
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/* ISR Status */
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#define VIRTIO_PCI_CAP_ISR_CFG 3
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/* Device specific configuration */
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#define VIRTIO_PCI_CAP_DEVICE_CFG 4
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/* PCI configuration access */
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#define VIRTIO_PCI_CAP_PCI_CFG 5
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/* This is the PCI capability header: */
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struct virtio_pci_cap {
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uint8_t cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
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uint8_t cap_next; /* Generic PCI field: next ptr. */
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uint8_t cap_len; /* Generic PCI field: capability length */
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uint8_t cfg_type; /* Identifies the structure. */
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uint8_t bar; /* Where to find it. */
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uint8_t padding[3]; /* Pad to full dword. */
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uint32_t offset; /* Offset within bar. */
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uint32_t length; /* Length of the structure, in bytes. */
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};
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struct virtio_pci_notify_cap {
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struct virtio_pci_cap cap;
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uint32_t notify_off_multiplier; /* Multiplier for queue_notify_off. */
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};
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/* Fields in VIRTIO_PCI_CAP_COMMON_CFG: */
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struct virtio_pci_common_cfg {
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/* About the whole device. */
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uint32_t device_feature_select; /* read-write */
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uint32_t device_feature; /* read-only */
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uint32_t guest_feature_select; /* read-write */
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uint32_t guest_feature; /* read-write */
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uint16_t msix_config; /* read-write */
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uint16_t num_queues; /* read-only */
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uint8_t device_status; /* read-write */
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uint8_t config_generation; /* read-only */
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/* About a specific virtqueue. */
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uint16_t queue_select; /* read-write */
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uint16_t queue_size; /* read-write, power of 2. */
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uint16_t queue_msix_vector; /* read-write */
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uint16_t queue_enable; /* read-write */
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uint16_t queue_notify_off; /* read-only */
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uint32_t queue_desc_lo; /* read-write */
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uint32_t queue_desc_hi; /* read-write */
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uint32_t queue_avail_lo; /* read-write */
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uint32_t queue_avail_hi; /* read-write */
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uint32_t queue_used_lo; /* read-write */
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uint32_t queue_used_hi; /* read-write */
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};
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struct virtio_crypto_hw;
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struct virtio_pci_ops {
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void (*read_dev_cfg)(struct virtio_crypto_hw *hw, size_t offset,
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void *dst, int len);
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void (*write_dev_cfg)(struct virtio_crypto_hw *hw, size_t offset,
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const void *src, int len);
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void (*reset)(struct virtio_crypto_hw *hw);
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uint8_t (*get_status)(struct virtio_crypto_hw *hw);
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void (*set_status)(struct virtio_crypto_hw *hw, uint8_t status);
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uint64_t (*get_features)(struct virtio_crypto_hw *hw);
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void (*set_features)(struct virtio_crypto_hw *hw, uint64_t features);
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uint8_t (*get_isr)(struct virtio_crypto_hw *hw);
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uint16_t (*set_config_irq)(struct virtio_crypto_hw *hw, uint16_t vec);
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uint16_t (*set_queue_irq)(struct virtio_crypto_hw *hw,
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struct virtqueue *vq, uint16_t vec);
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uint16_t (*get_queue_num)(struct virtio_crypto_hw *hw,
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uint16_t queue_id);
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int (*setup_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq);
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void (*del_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq);
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void (*notify_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq);
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};
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struct virtio_crypto_hw {
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/* control queue */
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struct virtqueue *cvq;
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uint16_t dev_id;
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uint16_t max_dataqueues;
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uint64_t req_guest_features;
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uint64_t guest_features;
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uint8_t use_msix;
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uint8_t modern;
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uint32_t notify_off_multiplier;
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uint8_t *isr;
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uint16_t *notify_base;
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struct virtio_pci_common_cfg *common_cfg;
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struct virtio_crypto_config *dev_cfg;
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const struct rte_cryptodev_capabilities *virtio_dev_capabilities;
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};
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/*
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* While virtio_crypto_hw is stored in shared memory, this structure stores
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* some infos that may vary in the multiple process model locally.
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* For example, the vtpci_ops pointer.
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*/
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struct virtio_hw_internal {
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const struct virtio_pci_ops *vtpci_ops;
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struct rte_pci_ioport io;
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};
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#define VTPCI_OPS(hw) (virtio_hw_internal[(hw)->dev_id].vtpci_ops)
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#define VTPCI_IO(hw) (&virtio_hw_internal[(hw)->dev_id].io)
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extern struct virtio_hw_internal virtio_hw_internal[RTE_MAX_VIRTIO_CRYPTO];
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/*
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* How many bits to shift physical queue address written to QUEUE_PFN.
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* 12 is historical, and due to x86 page size.
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*/
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#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
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/* The alignment to use between consumer and producer parts of vring. */
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#define VIRTIO_PCI_VRING_ALIGN 4096
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enum virtio_msix_status {
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VIRTIO_MSIX_NONE = 0,
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VIRTIO_MSIX_DISABLED = 1,
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VIRTIO_MSIX_ENABLED = 2
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};
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static inline int
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vtpci_with_feature(struct virtio_crypto_hw *hw, uint64_t bit)
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{
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return (hw->guest_features & (1ULL << bit)) != 0;
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}
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/*
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* Function declaration from virtio_pci.c
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*/
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int vtpci_cryptodev_init(struct rte_pci_device *dev,
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struct virtio_crypto_hw *hw);
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void vtpci_cryptodev_reset(struct virtio_crypto_hw *hw);
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void vtpci_cryptodev_reinit_complete(struct virtio_crypto_hw *hw);
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uint8_t vtpci_cryptodev_get_status(struct virtio_crypto_hw *hw);
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void vtpci_cryptodev_set_status(struct virtio_crypto_hw *hw, uint8_t status);
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uint64_t vtpci_cryptodev_negotiate_features(struct virtio_crypto_hw *hw,
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uint64_t host_features);
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void vtpci_write_cryptodev_config(struct virtio_crypto_hw *hw, size_t offset,
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const void *src, int length);
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void vtpci_read_cryptodev_config(struct virtio_crypto_hw *hw, size_t offset,
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void *dst, int length);
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uint8_t vtpci_cryptodev_isr(struct virtio_crypto_hw *hw);
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#endif /* _VIRTIO_PCI_H_ */
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