/*- * Copyright (c) 2014,2016 Microsoft Corp. * 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 unmodified, 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. */ #include #include #include #include #include #include #include #include #include #include #include "vmbus_if.h" #define VMBUS_IC_BRSIZE (4 * PAGE_SIZE) #define VMBUS_IC_VERCNT 2 #define VMBUS_IC_NEGOSZ \ __offsetof(struct vmbus_icmsg_negotiate, ic_ver[VMBUS_IC_VERCNT]) CTASSERT(VMBUS_IC_NEGOSZ < VMBUS_IC_BRSIZE); static int vmbus_ic_fwver_sysctl(SYSCTL_HANDLER_ARGS); static int vmbus_ic_msgver_sysctl(SYSCTL_HANDLER_ARGS); int vmbus_ic_negomsg(struct vmbus_ic_softc *sc, void *data, int *dlen0, uint32_t fw_ver, uint32_t msg_ver) { struct vmbus_icmsg_negotiate *nego; int i, cnt, dlen = *dlen0, error; uint32_t sel_fw_ver, sel_msg_ver; bool has_fw_ver, has_msg_ver; /* * Preliminary message verification. */ if (dlen < sizeof(*nego)) { device_printf(sc->ic_dev, "truncated ic negotiate, len %d\n", dlen); return (EINVAL); } nego = data; if (nego->ic_fwver_cnt == 0) { device_printf(sc->ic_dev, "ic negotiate does not contain " "framework version %u\n", nego->ic_fwver_cnt); return (EINVAL); } if (nego->ic_msgver_cnt == 0) { device_printf(sc->ic_dev, "ic negotiate does not contain " "message version %u\n", nego->ic_msgver_cnt); return (EINVAL); } cnt = nego->ic_fwver_cnt + nego->ic_msgver_cnt; if (dlen < __offsetof(struct vmbus_icmsg_negotiate, ic_ver[cnt])) { device_printf(sc->ic_dev, "ic negotiate does not contain " "versions %d\n", dlen); return (EINVAL); } error = EOPNOTSUPP; /* * Find the best match framework version. */ has_fw_ver = false; for (i = 0; i < nego->ic_fwver_cnt; ++i) { if (VMBUS_ICVER_LE(nego->ic_ver[i], fw_ver)) { if (!has_fw_ver) { sel_fw_ver = nego->ic_ver[i]; has_fw_ver = true; } else if (VMBUS_ICVER_GT(nego->ic_ver[i], sel_fw_ver)) { sel_fw_ver = nego->ic_ver[i]; } } } if (!has_fw_ver) { device_printf(sc->ic_dev, "failed to select framework " "version\n"); goto done; } /* * Fine the best match message version. */ has_msg_ver = false; for (i = nego->ic_fwver_cnt; i < nego->ic_fwver_cnt + nego->ic_msgver_cnt; ++i) { if (VMBUS_ICVER_LE(nego->ic_ver[i], msg_ver)) { if (!has_msg_ver) { sel_msg_ver = nego->ic_ver[i]; has_msg_ver = true; } else if (VMBUS_ICVER_GT(nego->ic_ver[i], sel_msg_ver)) { sel_msg_ver = nego->ic_ver[i]; } } } if (!has_msg_ver) { device_printf(sc->ic_dev, "failed to select message " "version\n"); goto done; } error = 0; done: if (bootverbose || !has_fw_ver || !has_msg_ver) { if (has_fw_ver) { device_printf(sc->ic_dev, "sel framework version: " "%u.%u\n", VMBUS_ICVER_MAJOR(sel_fw_ver), VMBUS_ICVER_MINOR(sel_fw_ver)); } for (i = 0; i < nego->ic_fwver_cnt; i++) { device_printf(sc->ic_dev, "supp framework version: " "%u.%u\n", VMBUS_ICVER_MAJOR(nego->ic_ver[i]), VMBUS_ICVER_MINOR(nego->ic_ver[i])); } if (has_msg_ver) { device_printf(sc->ic_dev, "sel message version: " "%u.%u\n", VMBUS_ICVER_MAJOR(sel_msg_ver), VMBUS_ICVER_MINOR(sel_msg_ver)); } for (i = nego->ic_fwver_cnt; i < nego->ic_fwver_cnt + nego->ic_msgver_cnt; i++) { device_printf(sc->ic_dev, "supp message version: " "%u.%u\n", VMBUS_ICVER_MAJOR(nego->ic_ver[i]), VMBUS_ICVER_MINOR(nego->ic_ver[i])); } } if (error) return (error); /* Record the selected versions. */ sc->ic_fwver = sel_fw_ver; sc->ic_msgver = sel_msg_ver; /* One framework version. */ nego->ic_fwver_cnt = 1; nego->ic_ver[0] = sel_fw_ver; /* One message version. */ nego->ic_msgver_cnt = 1; nego->ic_ver[1] = sel_msg_ver; /* Update data size. */ nego->ic_hdr.ic_dsize = VMBUS_IC_NEGOSZ - sizeof(struct vmbus_icmsg_hdr); /* Update total size, if necessary. */ if (dlen < VMBUS_IC_NEGOSZ) *dlen0 = VMBUS_IC_NEGOSZ; return (0); } int vmbus_ic_probe(device_t dev, const struct vmbus_ic_desc descs[]) { device_t bus = device_get_parent(dev); const struct vmbus_ic_desc *d; if (resource_disabled(device_get_name(dev), 0)) return (ENXIO); for (d = descs; d->ic_desc != NULL; ++d) { if (VMBUS_PROBE_GUID(bus, dev, &d->ic_guid) == 0) { device_set_desc(dev, d->ic_desc); return (BUS_PROBE_DEFAULT); } } return (ENXIO); } int vmbus_ic_attach(device_t dev, vmbus_chan_callback_t cb) { struct vmbus_ic_softc *sc = device_get_softc(dev); struct vmbus_channel *chan = vmbus_get_channel(dev); struct sysctl_oid_list *child; struct sysctl_ctx_list *ctx; int error; sc->ic_dev = dev; sc->ic_buflen = VMBUS_IC_BRSIZE; sc->ic_buf = malloc(VMBUS_IC_BRSIZE, M_DEVBUF, M_WAITOK | M_ZERO); /* * These services are not performance critical and do not need * batched reading. Furthermore, some services such as KVP can * only handle one message from the host at a time. * Turn off batched reading for all util drivers before we open the * channel. */ vmbus_chan_set_readbatch(chan, false); error = vmbus_chan_open(chan, VMBUS_IC_BRSIZE, VMBUS_IC_BRSIZE, NULL, 0, cb, sc); if (error) { free(sc->ic_buf, M_DEVBUF); return (error); } ctx = device_get_sysctl_ctx(dev); child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "fw_version", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, vmbus_ic_fwver_sysctl, "A", "framework version"); SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "msg_version", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, vmbus_ic_msgver_sysctl, "A", "message version"); return (0); } static int vmbus_ic_fwver_sysctl(SYSCTL_HANDLER_ARGS) { struct vmbus_ic_softc *sc = arg1; char verstr[16]; snprintf(verstr, sizeof(verstr), "%u.%u", VMBUS_ICVER_MAJOR(sc->ic_fwver), VMBUS_ICVER_MINOR(sc->ic_fwver)); return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); } static int vmbus_ic_msgver_sysctl(SYSCTL_HANDLER_ARGS) { struct vmbus_ic_softc *sc = arg1; char verstr[16]; snprintf(verstr, sizeof(verstr), "%u.%u", VMBUS_ICVER_MAJOR(sc->ic_msgver), VMBUS_ICVER_MINOR(sc->ic_msgver)); return sysctl_handle_string(oidp, verstr, sizeof(verstr), req); } int vmbus_ic_detach(device_t dev) { struct vmbus_ic_softc *sc = device_get_softc(dev); vmbus_chan_close(vmbus_get_channel(dev)); free(sc->ic_buf, M_DEVBUF); return (0); } int vmbus_ic_sendresp(struct vmbus_ic_softc *sc, struct vmbus_channel *chan, void *data, int dlen, uint64_t xactid) { struct vmbus_icmsg_hdr *hdr; int error; KASSERT(dlen >= sizeof(*hdr), ("invalid data length %d", dlen)); hdr = data; hdr->ic_flags = VMBUS_ICMSG_FLAG_XACT | VMBUS_ICMSG_FLAG_RESP; error = vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_INBAND, 0, data, dlen, xactid); if (error) device_printf(sc->ic_dev, "resp send failed: %d\n", error); return (error); }