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9613ad24b0
The assumption that the channel is only opened upon synthetic device attach time no longer holds, e.g. Hyper-V network device MTU changes. We have to allow device drivers to preallocate bufrings, e.g. in attach DEVMETHOD, to prevent bufring allocation failure once the system memory is fragmented after running for a while. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7960
177 lines
5.6 KiB
C
177 lines
5.6 KiB
C
/*-
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* Copyright (c) 2016 Microsoft Corp.
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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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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VMBUS_H_
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#define _VMBUS_H_
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#include <sys/param.h>
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#include <sys/bus.h>
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/*
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* VMBUS version is 32 bit, upper 16 bit for major_number and lower
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* 16 bit for minor_number.
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*
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* 0.13 -- Windows Server 2008
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* 1.1 -- Windows 7
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* 2.4 -- Windows 8
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* 3.0 -- Windows 8.1
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*/
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#define VMBUS_VERSION_WS2008 ((0 << 16) | (13))
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#define VMBUS_VERSION_WIN7 ((1 << 16) | (1))
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#define VMBUS_VERSION_WIN8 ((2 << 16) | (4))
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#define VMBUS_VERSION_WIN8_1 ((3 << 16) | (0))
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#define VMBUS_VERSION_MAJOR(ver) (((uint32_t)(ver)) >> 16)
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#define VMBUS_VERSION_MINOR(ver) (((uint32_t)(ver)) & 0xffff)
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/*
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* GPA stuffs.
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*/
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struct vmbus_gpa_range {
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uint32_t gpa_len;
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uint32_t gpa_ofs;
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uint64_t gpa_page[0];
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} __packed;
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/* This is actually vmbus_gpa_range.gpa_page[1] */
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struct vmbus_gpa {
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uint32_t gpa_len;
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uint32_t gpa_ofs;
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uint64_t gpa_page;
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} __packed;
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#define VMBUS_CHANPKT_SIZE_SHIFT 3
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#define VMBUS_CHANPKT_GETLEN(pktlen) \
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(((int)(pktlen)) << VMBUS_CHANPKT_SIZE_SHIFT)
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struct vmbus_chanpkt_hdr {
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uint16_t cph_type; /* VMBUS_CHANPKT_TYPE_ */
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uint16_t cph_hlen; /* header len, in 8 bytes */
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uint16_t cph_tlen; /* total len, in 8 bytes */
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uint16_t cph_flags; /* VMBUS_CHANPKT_FLAG_ */
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uint64_t cph_xactid;
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} __packed;
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#define VMBUS_CHANPKT_TYPE_INBAND 0x0006
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#define VMBUS_CHANPKT_TYPE_RXBUF 0x0007
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#define VMBUS_CHANPKT_TYPE_GPA 0x0009
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#define VMBUS_CHANPKT_TYPE_COMP 0x000b
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#define VMBUS_CHANPKT_FLAG_NONE 0
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#define VMBUS_CHANPKT_FLAG_RC 0x0001 /* report completion */
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#define VMBUS_CHANPKT_CONST_DATA(pkt) \
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(const void *)((const uint8_t *)(pkt) + \
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VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen))
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/* Include padding */
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#define VMBUS_CHANPKT_DATALEN(pkt) \
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(VMBUS_CHANPKT_GETLEN((pkt)->cph_tlen) -\
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VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen))
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struct vmbus_rxbuf_desc {
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uint32_t rb_len;
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uint32_t rb_ofs;
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} __packed;
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struct vmbus_chanpkt_rxbuf {
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struct vmbus_chanpkt_hdr cp_hdr;
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uint16_t cp_rxbuf_id;
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uint16_t cp_rsvd;
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uint32_t cp_rxbuf_cnt;
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struct vmbus_rxbuf_desc cp_rxbuf[];
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} __packed;
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struct vmbus_chan_br {
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void *cbr;
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bus_addr_t cbr_paddr;
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int cbr_txsz;
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int cbr_rxsz;
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};
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struct vmbus_channel;
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struct hyperv_guid;
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typedef void (*vmbus_chan_callback_t)(struct vmbus_channel *, void *);
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static __inline struct vmbus_channel *
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vmbus_get_channel(device_t dev)
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{
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return device_get_ivars(dev);
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}
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int vmbus_chan_open(struct vmbus_channel *chan,
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int txbr_size, int rxbr_size, const void *udata, int udlen,
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vmbus_chan_callback_t cb, void *cbarg);
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int vmbus_chan_open_br(struct vmbus_channel *chan,
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const struct vmbus_chan_br *cbr, const void *udata,
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int udlen, vmbus_chan_callback_t cb, void *cbarg);
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void vmbus_chan_close(struct vmbus_channel *chan);
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int vmbus_chan_gpadl_connect(struct vmbus_channel *chan,
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bus_addr_t paddr, int size, uint32_t *gpadl);
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int vmbus_chan_gpadl_disconnect(struct vmbus_channel *chan,
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uint32_t gpadl);
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void vmbus_chan_cpu_set(struct vmbus_channel *chan, int cpu);
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void vmbus_chan_cpu_rr(struct vmbus_channel *chan);
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struct vmbus_channel *
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vmbus_chan_cpu2chan(struct vmbus_channel *chan, int cpu);
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void vmbus_chan_set_readbatch(struct vmbus_channel *chan, bool on);
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struct vmbus_channel **
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vmbus_subchan_get(struct vmbus_channel *pri_chan,
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int subchan_cnt);
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void vmbus_subchan_rel(struct vmbus_channel **subchan,
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int subchan_cnt);
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void vmbus_subchan_drain(struct vmbus_channel *pri_chan);
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int vmbus_chan_recv(struct vmbus_channel *chan, void *data, int *dlen,
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uint64_t *xactid);
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int vmbus_chan_recv_pkt(struct vmbus_channel *chan,
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struct vmbus_chanpkt_hdr *pkt, int *pktlen);
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int vmbus_chan_send(struct vmbus_channel *chan, uint16_t type,
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uint16_t flags, void *data, int dlen, uint64_t xactid);
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int vmbus_chan_send_sglist(struct vmbus_channel *chan,
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struct vmbus_gpa sg[], int sglen, void *data, int dlen,
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uint64_t xactid);
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int vmbus_chan_send_prplist(struct vmbus_channel *chan,
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struct vmbus_gpa_range *prp, int prp_cnt, void *data,
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int dlen, uint64_t xactid);
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uint32_t vmbus_chan_id(const struct vmbus_channel *chan);
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uint32_t vmbus_chan_subidx(const struct vmbus_channel *chan);
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bool vmbus_chan_is_primary(const struct vmbus_channel *chan);
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const struct hyperv_guid *
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vmbus_chan_guid_inst(const struct vmbus_channel *chan);
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int vmbus_chan_prplist_nelem(int br_size, int prpcnt_max,
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int dlen_max);
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#endif /* !_VMBUS_H_ */
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