4d6d8babac
Suggested-by: Neil Horman <nhorman@tuxdriver.com> Suggested-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Alan Carew <alan.carew@intel.com>
278 lines
9.5 KiB
C
278 lines
9.5 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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#ifdef __FreeBSD__
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#include <sys/types.h>
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#include <machine/cpufunc.h>
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#else
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#include <sys/io.h>
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#endif
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#include <rte_ethdev.h>
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struct virtqueue;
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/* VirtIO PCI vendor/device ID. */
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#define VIRTIO_PCI_VENDORID 0x1AF4
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#define VIRTIO_PCI_DEVICEID_MIN 0x1000
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#define VIRTIO_PCI_DEVICEID_MAX 0x103F
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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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/* Only if MSIX is enabled: */
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#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */
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#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications
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(16, RW) */
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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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/* VirtIO device IDs. */
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#define VIRTIO_ID_NETWORK 0x01
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#define VIRTIO_ID_BLOCK 0x02
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#define VIRTIO_ID_CONSOLE 0x03
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#define VIRTIO_ID_ENTROPY 0x04
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#define VIRTIO_ID_BALLOON 0x05
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#define VIRTIO_ID_IOMEMORY 0x06
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#define VIRTIO_ID_9P 0x09
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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_FAILED 0x80
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/*
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* Generate interrupt when the virtqueue ring is
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* completely used, even if we've suppressed them.
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*/
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#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
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/*
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* The guest should never negotiate this feature; it
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* is used to detect faulty drivers.
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*/
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#define VIRTIO_F_BAD_FEATURE (1 << 30)
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/*
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* Some VirtIO feature bits (currently bits 28 through 31) are
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* reserved for the transport being used (eg. virtio_ring), the
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* rest are per-device feature bits.
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*/
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#define VIRTIO_TRANSPORT_F_START 28
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#define VIRTIO_TRANSPORT_F_END 32
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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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/* The feature bitmap for virtio net */
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#define VIRTIO_NET_F_CSUM 0x00001 /* Host handles pkts w/ partial csum */
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#define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/
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#define VIRTIO_NET_F_MAC 0x00020 /* Host has given MAC address. */
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#define VIRTIO_NET_F_GSO 0x00040 /* Host handles pkts w/ any GSO type */
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#define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */
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#define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */
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#define VIRTIO_NET_F_GUEST_ECN 0x00200 /* Guest can handle TSO[6] w/ ECN in.*/
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#define VIRTIO_NET_F_GUEST_UFO 0x00400 /* Guest can handle UFO in. */
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#define VIRTIO_NET_F_HOST_TSO4 0x00800 /* Host can handle TSOv4 in. */
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#define VIRTIO_NET_F_HOST_TSO6 0x01000 /* Host can handle TSOv6 in. */
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#define VIRTIO_NET_F_HOST_ECN 0x02000 /* Host can handle TSO[6] w/ ECN in. */
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#define VIRTIO_NET_F_HOST_UFO 0x04000 /* Host can handle UFO in. */
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#define VIRTIO_NET_F_MRG_RXBUF 0x08000 /* Host can merge receive buffers. */
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#define VIRTIO_NET_F_STATUS 0x10000 /* virtio_net_config.status available*/
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#define VIRTIO_NET_F_CTRL_VQ 0x20000 /* Control channel available */
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#define VIRTIO_NET_F_CTRL_RX 0x40000 /* Control channel RX mode support */
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#define VIRTIO_NET_F_CTRL_VLAN 0x80000 /* Control channel VLAN filtering */
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#define VIRTIO_NET_F_CTRL_RX_EXTRA 0x100000 /* Extra RX mode control support */
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#define VIRTIO_RING_F_INDIRECT_DESC 0x10000000 /* Support for indirect buffer descriptors. */
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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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* 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 0x20000000
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#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
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/*
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* Maximum number of virtqueues per device.
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*/
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#define VIRTIO_MAX_VIRTQUEUES 8
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struct virtio_hw {
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uint32_t io_base;
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uint32_t host_features;
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uint32_t guest_features;
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struct virtqueue *cvq;
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uint16_t vtnet_hdr_size;
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uint32_t max_tx_queues;
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uint32_t max_rx_queues;
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uint16_t device_id;
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uint16_t vendor_id;
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uint16_t subsystem_device_id;
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uint16_t subsystem_vendor_id;
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uint8_t revision_id;
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uint8_t use_msix;
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uint8_t mac_addr[ETHER_ADDR_LEN];
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int adapter_stopped;
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struct rte_eth_stats eth_stats;
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};
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/*
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* This structure is just a reference to read
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* net device specific config space; it just a chodu structure
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*
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*/
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struct virtio_net_config {
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/* The config defining mac address (if VIRTIO_NET_F_MAC) */
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uint8_t mac[ETHER_ADDR_LEN];
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/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
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uint16_t status;
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uint16_t max_virtqueue_pairs;
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} __attribute__((packed));
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/*
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* The remaining space is defined by each driver as the per-driver
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* configuration space.
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*/
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#define VIRTIO_PCI_CONFIG(hw) (((hw)->use_msix) ? 24 : 20)
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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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#ifdef __FreeBSD__
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static inline void
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outb_p(unsigned char data, unsigned int port)
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{
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outb(port, (u_char)data);
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}
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static inline void
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outw_p(unsigned short data, unsigned int port)
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{
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outw(port, (u_short)data);
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}
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static inline void
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outl_p(unsigned int data, unsigned int port)
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{
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outl(port, (u_int)data);
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}
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#endif
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#define VIRTIO_PCI_REG_ADDR(hw, reg) \
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(unsigned short)((hw)->io_base + (reg))
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#define VIRTIO_READ_REG_1(hw, reg) \
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inb((VIRTIO_PCI_REG_ADDR((hw), (reg))))
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#define VIRTIO_WRITE_REG_1(hw, reg, value) \
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outb_p((unsigned char)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
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#define VIRTIO_READ_REG_2(hw, reg) \
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inw((VIRTIO_PCI_REG_ADDR((hw), (reg))))
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#define VIRTIO_WRITE_REG_2(hw, reg, value) \
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outw_p((unsigned short)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
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#define VIRTIO_READ_REG_4(hw, reg) \
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inl((VIRTIO_PCI_REG_ADDR((hw), (reg))))
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#define VIRTIO_WRITE_REG_4(hw, reg, value) \
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outl_p((unsigned int)(value), (VIRTIO_PCI_REG_ADDR((hw), (reg))))
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static inline int
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vtpci_with_feature(struct virtio_hw *hw, uint32_t feature)
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{
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return (hw->guest_features & feature) != 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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void vtpci_reset(struct virtio_hw *);
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void vtpci_reinit_complete(struct virtio_hw *);
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uint8_t vtpci_get_status(struct virtio_hw *);
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void vtpci_set_status(struct virtio_hw *, uint8_t);
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uint32_t vtpci_negotiate_features(struct virtio_hw *, uint32_t);
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void vtpci_write_dev_config(struct virtio_hw *, uint64_t, void *, int);
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void vtpci_read_dev_config(struct virtio_hw *, uint64_t, void *, int);
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#endif /* _VIRTIO_PCI_H_ */
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