1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 HUAWEI TECHNOLOGIES CO., LTD.
11 #include <rte_bus_pci.h>
12 #include <rte_cryptodev.h>
14 #include "virtio_crypto.h"
18 /* VirtIO PCI vendor/device ID. */
19 #define VIRTIO_CRYPTO_PCI_VENDORID 0x1AF4
20 #define VIRTIO_CRYPTO_PCI_DEVICEID 0x1054
22 /* VirtIO ABI version, this must match exactly. */
23 #define VIRTIO_PCI_ABI_VERSION 0
26 * VirtIO Header, located in BAR 0.
28 #define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
29 #define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
30 #define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
31 #define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
32 #define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
33 #define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
34 #define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
35 #define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
36 * also clears the register (8, RO)
38 /* Only if MSIX is enabled: */
40 /* configuration change vector (16, RW) */
41 #define VIRTIO_MSI_CONFIG_VECTOR 20
42 /* vector for selected VQ notifications */
43 #define VIRTIO_MSI_QUEUE_VECTOR 22
45 /* The bit of the ISR which indicates a device has an interrupt. */
46 #define VIRTIO_PCI_ISR_INTR 0x1
47 /* The bit of the ISR which indicates a device configuration change. */
48 #define VIRTIO_PCI_ISR_CONFIG 0x2
49 /* Vector value used to disable MSI for queue. */
50 #define VIRTIO_MSI_NO_VECTOR 0xFFFF
52 /* Status byte for guest to report progress. */
53 #define VIRTIO_CONFIG_STATUS_RESET 0x00
54 #define VIRTIO_CONFIG_STATUS_ACK 0x01
55 #define VIRTIO_CONFIG_STATUS_DRIVER 0x02
56 #define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
57 #define VIRTIO_CONFIG_STATUS_FEATURES_OK 0x08
58 #define VIRTIO_CONFIG_STATUS_FAILED 0x80
61 * Each virtqueue indirect descriptor list must be physically contiguous.
62 * To allow us to malloc(9) each list individually, limit the number
63 * supported to what will fit in one page. With 4KB pages, this is a limit
64 * of 256 descriptors. If there is ever a need for more, we can switch to
65 * contigmalloc(9) for the larger allocations, similar to what
66 * bus_dmamem_alloc(9) does.
68 * Note the sizeof(struct vring_desc) is 16 bytes.
70 #define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16))
72 /* Do we get callbacks when the ring is completely used, even if we've
75 #define VIRTIO_F_NOTIFY_ON_EMPTY 24
77 /* Can the device handle any descriptor layout? */
78 #define VIRTIO_F_ANY_LAYOUT 27
80 /* We support indirect buffer descriptors */
81 #define VIRTIO_RING_F_INDIRECT_DESC 28
83 #define VIRTIO_F_VERSION_1 32
84 #define VIRTIO_F_IOMMU_PLATFORM 33
86 /* The Guest publishes the used index for which it expects an interrupt
87 * at the end of the avail ring. Host should ignore the avail->flags field.
89 /* The Host publishes the avail index for which it expects a kick
90 * at the end of the used ring. Guest should ignore the used->flags field.
92 #define VIRTIO_RING_F_EVENT_IDX 29
94 /* Common configuration */
95 #define VIRTIO_PCI_CAP_COMMON_CFG 1
97 #define VIRTIO_PCI_CAP_NOTIFY_CFG 2
99 #define VIRTIO_PCI_CAP_ISR_CFG 3
100 /* Device specific configuration */
101 #define VIRTIO_PCI_CAP_DEVICE_CFG 4
102 /* PCI configuration access */
103 #define VIRTIO_PCI_CAP_PCI_CFG 5
105 /* This is the PCI capability header: */
106 struct virtio_pci_cap {
107 uint8_t cap_vndr; /* Generic PCI field: PCI_CAP_ID_VNDR */
108 uint8_t cap_next; /* Generic PCI field: next ptr. */
109 uint8_t cap_len; /* Generic PCI field: capability length */
110 uint8_t cfg_type; /* Identifies the structure. */
111 uint8_t bar; /* Where to find it. */
112 uint8_t padding[3]; /* Pad to full dword. */
113 uint32_t offset; /* Offset within bar. */
114 uint32_t length; /* Length of the structure, in bytes. */
117 struct virtio_pci_notify_cap {
118 struct virtio_pci_cap cap;
119 uint32_t notify_off_multiplier; /* Multiplier for queue_notify_off. */
122 /* Fields in VIRTIO_PCI_CAP_COMMON_CFG: */
123 struct virtio_pci_common_cfg {
124 /* About the whole device. */
125 uint32_t device_feature_select; /* read-write */
126 uint32_t device_feature; /* read-only */
127 uint32_t guest_feature_select; /* read-write */
128 uint32_t guest_feature; /* read-write */
129 uint16_t msix_config; /* read-write */
130 uint16_t num_queues; /* read-only */
131 uint8_t device_status; /* read-write */
132 uint8_t config_generation; /* read-only */
134 /* About a specific virtqueue. */
135 uint16_t queue_select; /* read-write */
136 uint16_t queue_size; /* read-write, power of 2. */
137 uint16_t queue_msix_vector; /* read-write */
138 uint16_t queue_enable; /* read-write */
139 uint16_t queue_notify_off; /* read-only */
140 uint32_t queue_desc_lo; /* read-write */
141 uint32_t queue_desc_hi; /* read-write */
142 uint32_t queue_avail_lo; /* read-write */
143 uint32_t queue_avail_hi; /* read-write */
144 uint32_t queue_used_lo; /* read-write */
145 uint32_t queue_used_hi; /* read-write */
148 struct virtio_crypto_hw;
150 struct virtio_pci_ops {
151 void (*read_dev_cfg)(struct virtio_crypto_hw *hw, size_t offset,
153 void (*write_dev_cfg)(struct virtio_crypto_hw *hw, size_t offset,
154 const void *src, int len);
155 void (*reset)(struct virtio_crypto_hw *hw);
157 uint8_t (*get_status)(struct virtio_crypto_hw *hw);
158 void (*set_status)(struct virtio_crypto_hw *hw, uint8_t status);
160 uint64_t (*get_features)(struct virtio_crypto_hw *hw);
161 void (*set_features)(struct virtio_crypto_hw *hw, uint64_t features);
163 uint8_t (*get_isr)(struct virtio_crypto_hw *hw);
165 uint16_t (*set_config_irq)(struct virtio_crypto_hw *hw, uint16_t vec);
167 uint16_t (*set_queue_irq)(struct virtio_crypto_hw *hw,
168 struct virtqueue *vq, uint16_t vec);
170 uint16_t (*get_queue_num)(struct virtio_crypto_hw *hw,
172 int (*setup_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq);
173 void (*del_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq);
174 void (*notify_queue)(struct virtio_crypto_hw *hw, struct virtqueue *vq);
177 struct virtio_crypto_hw {
179 struct virtqueue *cvq;
181 uint16_t max_dataqueues;
182 uint64_t req_guest_features;
183 uint64_t guest_features;
186 uint32_t notify_off_multiplier;
188 uint16_t *notify_base;
189 struct virtio_pci_common_cfg *common_cfg;
190 struct virtio_crypto_config *dev_cfg;
191 const struct rte_cryptodev_capabilities *virtio_dev_capabilities;
195 * While virtio_crypto_hw is stored in shared memory, this structure stores
196 * some infos that may vary in the multiple process model locally.
197 * For example, the vtpci_ops pointer.
199 struct virtio_hw_internal {
200 const struct virtio_pci_ops *vtpci_ops;
201 struct rte_pci_ioport io;
204 #define VTPCI_OPS(hw) (virtio_hw_internal[(hw)->dev_id].vtpci_ops)
205 #define VTPCI_IO(hw) (&virtio_hw_internal[(hw)->dev_id].io)
207 extern struct virtio_hw_internal virtio_hw_internal[RTE_MAX_VIRTIO_CRYPTO];
210 * How many bits to shift physical queue address written to QUEUE_PFN.
211 * 12 is historical, and due to x86 page size.
213 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
215 /* The alignment to use between consumer and producer parts of vring. */
216 #define VIRTIO_PCI_VRING_ALIGN 4096
218 enum virtio_msix_status {
219 VIRTIO_MSIX_NONE = 0,
220 VIRTIO_MSIX_DISABLED = 1,
221 VIRTIO_MSIX_ENABLED = 2
225 vtpci_with_feature(struct virtio_crypto_hw *hw, uint64_t bit)
227 return (hw->guest_features & (1ULL << bit)) != 0;
231 * Function declaration from virtio_pci.c
233 int vtpci_cryptodev_init(struct rte_pci_device *dev,
234 struct virtio_crypto_hw *hw);
235 void vtpci_cryptodev_reset(struct virtio_crypto_hw *hw);
237 void vtpci_cryptodev_reinit_complete(struct virtio_crypto_hw *hw);
239 uint8_t vtpci_cryptodev_get_status(struct virtio_crypto_hw *hw);
240 void vtpci_cryptodev_set_status(struct virtio_crypto_hw *hw, uint8_t status);
242 uint64_t vtpci_cryptodev_negotiate_features(struct virtio_crypto_hw *hw,
243 uint64_t host_features);
245 void vtpci_write_cryptodev_config(struct virtio_crypto_hw *hw, size_t offset,
246 const void *src, int length);
248 void vtpci_read_cryptodev_config(struct virtio_crypto_hw *hw, size_t offset,
249 void *dst, int length);
251 uint8_t vtpci_cryptodev_isr(struct virtio_crypto_hw *hw);
253 #endif /* _VIRTIO_PCI_H_ */