diff options
Diffstat (limited to 'drivers/crypto/virtio/virtio_pci.h')
| -rw-r--r-- | drivers/crypto/virtio/virtio_pci.h | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/crypto/virtio/virtio_pci.h b/drivers/crypto/virtio/virtio_pci.h new file mode 100644 index 00000000..604ec366 --- /dev/null +++ b/drivers/crypto/virtio/virtio_pci.h @@ -0,0 +1,253 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 HUAWEI TECHNOLOGIES CO., LTD. + */ + +#ifndef _VIRTIO_PCI_H_ +#define _VIRTIO_PCI_H_ + +#include <stdint.h> + +#include <rte_pci.h> +#include <rte_bus_pci.h> +#include <rte_cryptodev.h> + +#include "virtio_crypto.h" + +struct virtqueue; + +/* VirtIO PCI vendor/device ID. */ +#define VIRTIO_CRYPTO_PCI_VENDORID 0x1AF4 +#define VIRTIO_CRYPTO_PCI_DEVICEID 0x1054 + +/* VirtIO ABI version, this must match exactly. */ +#define VIRTIO_PCI_ABI_VERSION 0 + +/* + * VirtIO Header, located in BAR 0. + */ +#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/ +#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */ +#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */ +#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */ +#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */ +#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */ +#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */ +#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading + * also clears the register (8, RO) + */ +/* Only if MSIX is enabled: */ + +/* configuration change vector (16, RW) */ +#define VIRTIO_MSI_CONFIG_VECTOR 20 +/* vector for selected VQ notifications */ +#define VIRTIO_MSI_QUEUE_VECTOR 22 + +/* The bit of the ISR which indicates a device has an interrupt. */ +#define VIRTIO_PCI_ISR_INTR 0x1 +/* The bit of the ISR which indicates a device configuration change. */ +#define VIRTIO_PCI_ISR_CONFIG 0x2 +/* Vector value used to disable MSI for queue. */ +#define VIRTIO_MSI_NO_VECTOR 0xFFFF + +/* Status byte for guest to report progress. */ +#define VIRTIO_CONFIG_STATUS_RESET 0x00 +#define VIRTIO_CONFIG_STATUS_ACK 0x01 +#define VIRTIO_CONFIG_STATUS_DRIVER 0x02 +#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04 +#define VIRTIO_CONFIG_STATUS_FEATURES_OK 0x08 +#define VIRTIO_CONFIG_STATUS_FAILED 0x80 + +/* + * Each virtqueue indirect descriptor list must be physically contiguous. + * To allow us to malloc(9) each list individually, limit the number + * supported to what will fit in one page. With 4KB pages, this is a limit + * of 256 descriptors. If there is ever a need for more, we can switch to + * contigmalloc(9) for the larger allocations, similar to what + * bus_dmamem_alloc(9) does. + * + * Note the sizeof(struct vring_desc) is 16 bytes. + */ +#define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16)) + +/* Do we get callbacks when the ring is completely used, even if we've + * suppressed them? + */ +#define VIRTIO_F_NOTIFY_ON_EMPTY 24 + +/* Can the device handle any descriptor layout? */ +#define VIRTIO_F_ANY_LAYOUT 27 + +/* We support indirect buffer descriptors */ +#define VIRTIO_RING_F_INDIRECT_DESC 28 + +#define VIRTIO_F_VERSION_1 32 +#define VIRTIO_F_IOMMU_PLATFORM 33 + +/* The Guest publishes the used index for which it expects an interrupt + * at the end of the avail ring. Host should ignore the avail->flags field. + */ +/* The Host publishes the avail index for which it expects a kick + * at the end of the used ring. Guest should ignore the used->flags field. + */ +#define VIRTIO_RING_F_EVENT_IDX 29 + +/* Common configuration */ +#define VIRTIO_PCI_CAP_COMMON_CFG 1 +/* Notifications */ +#define VIRTIO_PCI_CAP_NOTIFY_CFG 2 +/* ISR Status */ +#define VIRTIO_PCI_CAP_ISR_CFG 3 +/* Device specific configuration */ +#define VIRTIO_PCI_CAP_DEVICE_CFG 4 +/* PCI configuration access */ +#define VIRTIO_PCI_CAP_PCI_CFG 5 + +/* This is the PCI capability header: */ +struct virtio_pci_cap { + uint8_t cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */ + uint8_t cap_next; /* Generic PCI field: next ptr. */ + uint8_t cap_len; /* Generic PCI field: capability length */ + uint8_t cfg_type; /* Identifies the structure. */ + uint8_t bar; /* Where to find it. */ + uint8_t padding[3]; /* Pad to full dword. */ + uint32_t offset; /* Offset within bar. */ + uint32_t length; /* Length of the structure, in bytes. */ +}; + +struct virtio_pci_notify_cap { + struct virtio_pci_cap cap; + uint32_t notify_off_multiplier; /* Multiplier for queue_notify_off. */ +}; + +/* Fields in VIRTIO_PCI_CAP_COMMON_CFG: */ +struct virtio_pci_common_cfg { + /* About the whole device. */ + uint32_t device_feature_select; /* read-write */ + uint32_t device_feature; /* read-only */ + uint32_t guest_feature_select; /* read-write */ + uint32_t guest_feature; /* read-write */ + uint16_t msix_config; /* read-write */ + uint16_t num_queues; /* read-only */ + uint8_t device_status; /* read-write */ + uint8_t config_generation; /* read-only */ + + /* About a specific virtqueue. */ + uint16_t queue_select; /* read-write */ + uint16_t queue_size; /* read-write, power of 2. */ + uint16_t queue_msix_vector; /* read-write */ + uint16_t queue_enable; /* read-write */ + uint16_t queue_notify_off; /* read-only */ + uint32_t queue_desc_lo; /* read-write */ + uint32_t queue_desc_hi; /* read-write */ + uint32_t queue_avail_lo; /* read-write */ + uint32_t queue_avail_hi; /* read-write */ + uint32_t queue_used_lo; /* read-write */ + uint32_t queue_used_hi; /* read-write */ +}; + +struct virtio_crypto_hw; + +struct virtio_pci_ops { + void (*read_dev_cfg)(struct virtio_crypto_hw *hw, size_t offset, + void *dst, int len); + void (*write_dev_cfg)(struct virtio_crypto_hw *hw, size_t offset, + const void *src, int len); + void (*reset)(struct virtio_crypto_hw *hw); + + uint8_t (*get_status)(struct virtio_crypto_hw *hw); + void (*set_status)(struct virtio_crypto_hw *hw, uint8_t status); + + uint64_t (*get_features)(struct virtio_crypto_hw *hw); + void (*set_features)(struct virtio_crypto_hw *hw, uint64_t features); + + uint8_t (*get_isr)(struct virtio_crypto_hw *hw); + + uint16_t (*set_config_irq)(struct virtio_crypto_hw *hw, uint16_t vec); + + uint16_t (*set_queue_irq)(struct virtio_crypto_hw *hw, + struct virtqueue *vq, uint16_t vec); + + uint16_t (*get_queue_num)(struct virtio_crypto_hw *hw, + uint16_t queue_id); + int (*setup_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq); + void (*del_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq); + void (*notify_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq); +}; + +struct virtio_crypto_hw { + /* control queue */ + struct virtqueue *cvq; + uint16_t dev_id; + uint16_t max_dataqueues; + uint64_t req_guest_features; + uint64_t guest_features; + uint8_t use_msix; + uint8_t modern; + uint32_t notify_off_multiplier; + uint8_t *isr; + uint16_t *notify_base; + struct virtio_pci_common_cfg *common_cfg; + struct virtio_crypto_config *dev_cfg; + const struct rte_cryptodev_capabilities *virtio_dev_capabilities; +}; + +/* + * While virtio_crypto_hw is stored in shared memory, this structure stores + * some infos that may vary in the multiple process model locally. + * For example, the vtpci_ops pointer. + */ +struct virtio_hw_internal { + const struct virtio_pci_ops *vtpci_ops; + struct rte_pci_ioport io; +}; + +#define VTPCI_OPS(hw) (virtio_hw_internal[(hw)->dev_id].vtpci_ops) +#define VTPCI_IO(hw) (&virtio_hw_internal[(hw)->dev_id].io) + +extern struct virtio_hw_internal virtio_hw_internal[RTE_MAX_VIRTIO_CRYPTO]; + +/* + * How many bits to shift physical queue address written to QUEUE_PFN. + * 12 is historical, and due to x86 page size. + */ +#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 + +/* The alignment to use between consumer and producer parts of vring. */ +#define VIRTIO_PCI_VRING_ALIGN 4096 + +enum virtio_msix_status { + VIRTIO_MSIX_NONE = 0, + VIRTIO_MSIX_DISABLED = 1, + VIRTIO_MSIX_ENABLED = 2 +}; + +static inline int +vtpci_with_feature(struct virtio_crypto_hw *hw, uint64_t bit) +{ + return (hw->guest_features & (1ULL << bit)) != 0; +} + +/* + * Function declaration from virtio_pci.c + */ +int vtpci_cryptodev_init(struct rte_pci_device *dev, + struct virtio_crypto_hw *hw); +void vtpci_cryptodev_reset(struct virtio_crypto_hw *hw); + +void vtpci_cryptodev_reinit_complete(struct virtio_crypto_hw *hw); + +uint8_t vtpci_cryptodev_get_status(struct virtio_crypto_hw *hw); +void vtpci_cryptodev_set_status(struct virtio_crypto_hw *hw, uint8_t status); + +uint64_t vtpci_cryptodev_negotiate_features(struct virtio_crypto_hw *hw, + uint64_t host_features); + +void vtpci_write_cryptodev_config(struct virtio_crypto_hw *hw, size_t offset, + const void *src, int length); + +void vtpci_read_cryptodev_config(struct virtio_crypto_hw *hw, size_t offset, + void *dst, int length); + +uint8_t vtpci_cryptodev_isr(struct virtio_crypto_hw *hw); + +#endif /* _VIRTIO_PCI_H_ */ |