/* * Copyright (c) 2010 Minoura Makoto. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * Part of the file derived from `Virtio PCI Card Specification v0.8.6 DRAFT' * Appendix A. */ /* * An interface for efficient virtio implementation. * * This header is BSD licensed so anyone can use the definitions * to implement compatible drivers/servers. * * Copyright 2007, 2009, IBM Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name of IBM 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'' ANDANY 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 IBM 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. */ /* * Copyright 2012 Nexenta Systems, Inc. All rights reserved. */ #ifndef __VIRTIOVAR_H__ #define __VIRTIOVAR_H__ #include #include #include #include #ifdef DEBUG #define dev_debug(dip, fmt, arg...) \ dev_err(dip, fmt, ##arg) #else #define dev_debug(dip, fmt, arg...) #endif struct vq_entry { list_node_t qe_list; struct virtqueue *qe_queue; uint16_t qe_index; /* index in vq_desc array */ /* followings are used only when it is the `head' entry */ struct vq_entry *qe_next; struct vring_desc *qe_desc; ddi_dma_cookie_t qe_indirect_dma_cookie; ddi_dma_handle_t qe_indirect_dma_handle; ddi_acc_handle_t qe_indirect_dma_acch; struct vring_desc *qe_indirect_descs; unsigned int qe_indirect_next; }; struct virtqueue { struct virtio_softc *vq_owner; unsigned int vq_num; /* queue size (# of entries) */ unsigned int vq_indirect_num; int vq_index; /* queue number (0, 1, ...) */ /* vring pointers (KVA) */ struct vring_desc *vq_descs; struct vring_avail *vq_avail; struct vring_used *vq_used; /* virtqueue allocation info */ void *vq_vaddr; int vq_availoffset; int vq_usedoffset; ddi_dma_cookie_t vq_dma_cookie; ddi_dma_handle_t vq_dma_handle; ddi_acc_handle_t vq_dma_acch; int vq_maxsegsize; /* free entry management */ struct vq_entry *vq_entries; list_t vq_freelist; kmutex_t vq_freelist_lock; int vq_used_entries; /* enqueue/dequeue status */ uint16_t vq_avail_idx; kmutex_t vq_avail_lock; uint16_t vq_used_idx; kmutex_t vq_used_lock; }; struct virtio_softc { dev_info_t *sc_dev; uint_t sc_intr_prio; ddi_acc_handle_t sc_ioh; caddr_t sc_io_addr; int sc_config_offset; uint32_t sc_features; int sc_nvqs; /* set by the user */ ddi_intr_handle_t *sc_intr_htable; int sc_intr_num; boolean_t sc_intr_config; int sc_intr_cap; }; struct virtio_int_handler { ddi_intr_handler_t *vh_func; void *vh_priv; }; /* public interface */ uint32_t virtio_negotiate_features(struct virtio_softc *, uint32_t); size_t virtio_show_features(uint32_t features, char *buffer, size_t len); boolean_t virtio_has_feature(struct virtio_softc *sc, uint32_t feature); void virtio_set_status(struct virtio_softc *sc, unsigned int); #define virtio_device_reset(sc) virtio_set_status((sc), 0) uint8_t virtio_read_device_config_1(struct virtio_softc *sc, unsigned int index); uint16_t virtio_read_device_config_2(struct virtio_softc *sc, unsigned int index); uint32_t virtio_read_device_config_4(struct virtio_softc *sc, unsigned int index); uint64_t virtio_read_device_config_8(struct virtio_softc *sc, unsigned int index); void virtio_write_device_config_1(struct virtio_softc *sc, unsigned int index, uint8_t value); void virtio_write_device_config_2(struct virtio_softc *sc, unsigned int index, uint16_t value); void virtio_write_device_config_4(struct virtio_softc *sc, unsigned int index, uint32_t value); void virtio_write_device_config_8(struct virtio_softc *sc, unsigned int index, uint64_t value); struct virtqueue *virtio_alloc_vq(struct virtio_softc *sc, unsigned int index, unsigned int size, unsigned int indirect_num, const char *name); void virtio_free_vq(struct virtqueue *); void virtio_reset(struct virtio_softc *); struct vq_entry *vq_alloc_entry(struct virtqueue *vq); void vq_free_entry(struct virtqueue *vq, struct vq_entry *qe); uint_t vq_num_used(struct virtqueue *vq); unsigned int virtio_ve_indirect_available(struct vq_entry *qe); void virtio_stop_vq_intr(struct virtqueue *); void virtio_start_vq_intr(struct virtqueue *); void virtio_ve_add_cookie(struct vq_entry *qe, ddi_dma_handle_t dma_handle, ddi_dma_cookie_t dma_cookie, unsigned int ncookies, boolean_t write); void virtio_ve_add_indirect_buf(struct vq_entry *qe, uint64_t paddr, uint32_t len, boolean_t write); void virtio_ve_set(struct vq_entry *qe, uint64_t paddr, uint32_t len, boolean_t write); void virtio_push_chain(struct vq_entry *qe, boolean_t sync); struct vq_entry *virtio_pull_chain(struct virtqueue *vq, uint32_t *len); void virtio_free_chain(struct vq_entry *ve); void virtio_sync_vq(struct virtqueue *vq); int virtio_register_ints(struct virtio_softc *sc, struct virtio_int_handler *config_handler, struct virtio_int_handler vq_handlers[]); void virtio_release_ints(struct virtio_softc *sc); int virtio_enable_ints(struct virtio_softc *sc); #endif /* __VIRTIOVAR_H__ */