X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fvirtio%2Fvirtio_pci.h;h=11e25a0142fed909861176ad08969e595d9a87ab;hb=b3bc560bd6bdf3c9851d25bc0a66cb24aa1fd48c;hp=e8e7509d1d528fa62c66daf9e15efe9a47e53653;hpb=d5bbeefca82610c211b26390b0bd6a02704f10eb;p=dpdk.git diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h index e8e7509d1d..11e25a0142 100644 --- a/drivers/net/virtio/virtio_pci.h +++ b/drivers/net/virtio/virtio_pci.h @@ -1,56 +1,26 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2010-2014 Intel Corporation */ #ifndef _VIRTIO_PCI_H_ #define _VIRTIO_PCI_H_ #include +#include -#ifdef __FreeBSD__ -#include -#include -#else -#include -#endif +#include +#include +#include -#include +#include "virtio.h" struct virtqueue; +struct virtnet_ctl; /* VirtIO PCI vendor/device ID. */ #define VIRTIO_PCI_VENDORID 0x1AF4 -#define VIRTIO_PCI_DEVICEID_MIN 0x1000 -#define VIRTIO_PCI_DEVICEID_MAX 0x103F +#define VIRTIO_PCI_LEGACY_DEVICEID_NET 0x1000 +#define VIRTIO_PCI_MODERN_DEVICEID_NET 0x1041 /* VirtIO ABI version, this must match exactly. */ #define VIRTIO_PCI_ABI_VERSION 0 @@ -72,154 +42,89 @@ struct virtqueue; #define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications (16, RW) */ -/* 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 - -/* VirtIO device IDs. */ -#define VIRTIO_ID_NETWORK 0x01 -#define VIRTIO_ID_BLOCK 0x02 -#define VIRTIO_ID_CONSOLE 0x03 -#define VIRTIO_ID_ENTROPY 0x04 -#define VIRTIO_ID_BALLOON 0x05 -#define VIRTIO_ID_IOMEMORY 0x06 -#define VIRTIO_ID_9P 0x09 - -/* 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_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)) - -/* The feature bitmap for virtio net */ -#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */ -#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */ -#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */ -#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */ -#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */ -#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */ -#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */ -#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */ -#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */ -#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */ -#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */ -#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */ -#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */ -#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */ -#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */ -#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */ -#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */ -#define VIRTIO_NET_F_GUEST_ANNOUNCE 21 /* Guest can announce device on the - * network */ -#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow - * Steering */ -#define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ - -/* 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 - -/* - * Some VirtIO feature bits (currently bits 28 through 31) are - * reserved for the transport being used (eg. virtio_ring), the - * rest are per-device feature bits. - */ -#define VIRTIO_TRANSPORT_F_START 28 -#define VIRTIO_TRANSPORT_F_END 32 - -/* 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 - -#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */ -#define VIRTIO_NET_S_ANNOUNCE 2 /* Announcement is needed */ - -/* - * Maximum number of virtqueues per device. - */ -#define VIRTIO_MAX_VIRTQUEUES 8 - -struct virtio_hw; +/* 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_ops { - void (*read_dev_cfg)(struct virtio_hw *hw, size_t offset, - void *dst, int len); - void (*write_dev_cfg)(struct virtio_hw *hw, size_t offset, - const void *src, int len); - void (*reset)(struct virtio_hw *hw); +struct virtio_pci_notify_cap { + struct virtio_pci_cap cap; + uint32_t notify_off_multiplier; /* Multiplier for queue_notify_off. */ +}; - uint8_t (*get_status)(struct virtio_hw *hw); - void (*set_status)(struct virtio_hw *hw, uint8_t status); +/* 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 */ +}; - uint32_t (*get_features)(struct virtio_hw *hw); - void (*set_features)(struct virtio_hw *hw, uint32_t features); +enum virtio_msix_status { + VIRTIO_MSIX_NONE = 0, + VIRTIO_MSIX_DISABLED = 1, + VIRTIO_MSIX_ENABLED = 2 +}; - uint8_t (*get_isr)(struct virtio_hw *hw); +struct virtio_pci_dev { + struct virtio_hw hw; + struct virtio_pci_common_cfg *common_cfg; + struct virtio_net_config *dev_cfg; + enum virtio_msix_status msix_status; + uint8_t *isr; + uint16_t *notify_base; + uint32_t notify_off_multiplier; + bool modern; +}; - uint16_t (*set_config_irq)(struct virtio_hw *hw, uint16_t vec); +#define virtio_pci_get_dev(hwp) container_of(hwp, struct virtio_pci_dev, hw) - uint16_t (*get_queue_num)(struct virtio_hw *hw, uint16_t queue_id); - void (*setup_queue)(struct virtio_hw *hw, struct virtqueue *vq); - void (*del_queue)(struct virtio_hw *hw, struct virtqueue *vq); - void (*notify_queue)(struct virtio_hw *hw, struct virtqueue *vq); +struct virtio_pci_internal { + struct rte_pci_ioport io; + struct rte_pci_device *dev; }; -struct virtio_hw { - struct virtqueue *cvq; - uint32_t io_base; - uint32_t guest_features; - uint32_t max_tx_queues; - uint32_t max_rx_queues; - uint16_t vtnet_hdr_size; - uint8_t vlan_strip; - uint8_t use_msix; - uint8_t started; - uint8_t mac_addr[ETHER_ADDR_LEN]; - const struct virtio_pci_ops *vtpci_ops; -}; +extern struct virtio_pci_internal virtio_pci_internal[RTE_MAX_ETHPORTS]; -/* - * This structure is just a reference to read - * net device specific config space; it just a chodu structure - * - */ -struct virtio_net_config { - /* The config defining mac address (if VIRTIO_NET_F_MAC) */ - uint8_t mac[ETHER_ADDR_LEN]; - /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */ - uint16_t status; - uint16_t max_virtqueue_pairs; -} __attribute__((packed)); +#define VTPCI_IO(hw) (&virtio_pci_internal[(hw)->port_id].io) +#define VTPCI_DEV(hw) (virtio_pci_internal[(hw)->port_id].dev) -/* - * The remaining space is defined by each driver as the per-driver - * configuration space. - */ -#define VIRTIO_PCI_CONFIG(hw) (((hw)->use_msix) ? 24 : 20) /* * How many bits to shift physical queue address written to QUEUE_PFN. @@ -227,73 +132,14 @@ struct virtio_net_config { */ #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 -/* The alignment to use between consumer and producer parts of vring. */ -#define VIRTIO_PCI_VRING_ALIGN 4096 - -#ifdef __FreeBSD__ - -static inline void -outb_p(unsigned char data, unsigned int port) -{ - - outb(port, (u_char)data); -} - -static inline void -outw_p(unsigned short data, unsigned int port) -{ - outw(port, (u_short)data); -} - -static inline void -outl_p(unsigned int data, unsigned int port) -{ - outl(port, (u_int)data); -} -#endif - -#define VIRTIO_PCI_REG_ADDR(hw, reg) \ - (unsigned short)((hw)->io_base + (reg)) - -#define VIRTIO_READ_REG_1(hw, reg) \ - inb((VIRTIO_PCI_REG_ADDR((hw), (reg)))) -#define VIRTIO_WRITE_REG_1(hw, reg, value) \ - outb_p((unsigned char)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg)))) - -#define VIRTIO_READ_REG_2(hw, reg) \ - inw((VIRTIO_PCI_REG_ADDR((hw), (reg)))) -#define VIRTIO_WRITE_REG_2(hw, reg, value) \ - outw_p((unsigned short)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg)))) - -#define VIRTIO_READ_REG_4(hw, reg) \ - inl((VIRTIO_PCI_REG_ADDR((hw), (reg)))) -#define VIRTIO_WRITE_REG_4(hw, reg, value) \ - outl_p((unsigned int)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg)))) - -static inline int -vtpci_with_feature(struct virtio_hw *hw, uint32_t bit) -{ - return (hw->guest_features & (1u << bit)) != 0; -} - /* * Function declaration from virtio_pci.c */ -int vtpci_init(struct rte_pci_device *, struct virtio_hw *); -void vtpci_reset(struct virtio_hw *); - -void vtpci_reinit_complete(struct virtio_hw *); - -void vtpci_set_status(struct virtio_hw *, uint8_t); - -uint32_t vtpci_negotiate_features(struct virtio_hw *, uint32_t); - -void vtpci_write_dev_config(struct virtio_hw *, size_t, const void *, int); - -void vtpci_read_dev_config(struct virtio_hw *, size_t, void *, int); - -uint8_t vtpci_isr(struct virtio_hw *); +int vtpci_init(struct rte_pci_device *pci_dev, struct virtio_pci_dev *dev); +void vtpci_legacy_ioport_unmap(struct virtio_hw *hw); +int vtpci_legacy_ioport_map(struct virtio_hw *hw); -uint16_t vtpci_irq_config(struct virtio_hw *, uint16_t); +extern const struct virtio_ops legacy_ops; +extern const struct virtio_ops modern_ops; #endif /* _VIRTIO_PCI_H_ */