1 /*- 2 * Copyright (c) 2016 Microsoft Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _VMBUS_CHANVAR_H_ 30 #define _VMBUS_CHANVAR_H_ 31 32 #include <sys/param.h> 33 #include <sys/callout.h> 34 #include <sys/lock.h> 35 #include <sys/mutex.h> 36 #include <sys/queue.h> 37 #include <sys/sysctl.h> 38 #include <sys/sx.h> 39 #include <sys/taskqueue.h> 40 41 #include <dev/hyperv/include/hyperv.h> 42 #include <dev/hyperv/include/hyperv_busdma.h> 43 #include <dev/hyperv/include/vmbus.h> 44 #include <dev/hyperv/vmbus/vmbus_brvar.h> 45 46 struct vmbus_channel { 47 /* 48 * NOTE: 49 * Fields before ch_txbr are only accessed on this channel's 50 * target CPU. 51 */ 52 uint32_t ch_flags; /* VMBUS_CHAN_FLAG_ */ 53 int ch_poll_flags; /* callout flags */ 54 55 /* 56 * RX bufring; immediately following ch_txbr. 57 */ 58 struct vmbus_rxbr ch_rxbr; 59 60 struct taskqueue *ch_tq; 61 struct task ch_task; 62 struct task ch_poll_task; 63 sbintime_t ch_poll_intvl; 64 struct callout ch_poll_timeo; 65 vmbus_chan_callback_t ch_cb; 66 void *ch_cbarg; 67 68 /* 69 * TX bufring; at the beginning of ch_bufring. 70 * 71 * NOTE: 72 * Put TX bufring and the following MNF/evtflag to a new 73 * cacheline, since they will be accessed on all CPUs by 74 * locking ch_txbr first. 75 * 76 * XXX 77 * TX bufring and following MNF/evtflags do _not_ fit in 78 * one 64B cacheline. 79 */ 80 struct vmbus_txbr ch_txbr __aligned(CACHE_LINE_SIZE); 81 uint32_t ch_txflags; /* VMBUS_CHAN_TXF_ */ 82 83 /* 84 * These are based on the vmbus_chanmsg_choffer.chm_montrig. 85 * Save it here for easy access. 86 */ 87 uint32_t ch_montrig_mask;/* MNF trig mask */ 88 volatile uint32_t *ch_montrig; /* MNF trigger loc. */ 89 90 /* 91 * These are based on the vmbus_chanmsg_choffer.chm_chanid. 92 * Save it here for easy access. 93 */ 94 u_long ch_evtflag_mask;/* event flag */ 95 volatile u_long *ch_evtflag; /* event flag loc. */ 96 97 /* 98 * Rarely used fields. 99 */ 100 101 struct hyperv_mon_param *ch_monprm; 102 struct hyperv_dma ch_monprm_dma; 103 104 uint32_t ch_id; /* channel id */ 105 device_t ch_dev; 106 struct vmbus_softc *ch_vmbus; 107 108 int ch_cpuid; /* owner cpu */ 109 /* 110 * Virtual cpuid for ch_cpuid; it is used to communicate cpuid 111 * related information w/ Hyper-V. If MSR_HV_VP_INDEX does not 112 * exist, ch_vcpuid will always be 0 for compatibility. 113 */ 114 uint32_t ch_vcpuid; 115 116 /* 117 * If this is a primary channel, ch_subchan* fields 118 * contain sub-channels belonging to this primary 119 * channel. 120 */ 121 struct mtx ch_subchan_lock; 122 TAILQ_HEAD(, vmbus_channel) ch_subchans; 123 int ch_subchan_cnt; 124 125 /* If this is a sub-channel */ 126 TAILQ_ENTRY(vmbus_channel) ch_sublink; /* sub-channel link */ 127 struct vmbus_channel *ch_prichan; /* owner primary chan */ 128 129 void *ch_bufring; /* TX+RX bufrings */ 130 struct hyperv_dma ch_bufring_dma; 131 uint32_t ch_bufring_gpadl; 132 133 struct task ch_attach_task; /* run in ch_mgmt_tq */ 134 struct task ch_detach_task; /* run in ch_mgmt_tq */ 135 struct taskqueue *ch_mgmt_tq; 136 137 /* If this is a primary channel */ 138 TAILQ_ENTRY(vmbus_channel) ch_prilink; /* primary chan link */ 139 140 TAILQ_ENTRY(vmbus_channel) ch_link; /* channel link */ 141 uint32_t ch_subidx; /* subchan index */ 142 volatile uint32_t ch_stflags; /* atomic-op */ 143 /* VMBUS_CHAN_ST_ */ 144 struct hyperv_guid ch_guid_type; 145 struct hyperv_guid ch_guid_inst; 146 147 struct sx ch_orphan_lock; 148 struct vmbus_xact_ctx *ch_orphan_xact; 149 150 int ch_refs; 151 152 struct sysctl_ctx_list ch_sysctl_ctx; 153 } __aligned(CACHE_LINE_SIZE); 154 155 #define VMBUS_CHAN_ISPRIMARY(chan) ((chan)->ch_subidx == 0) 156 157 /* 158 * If this flag is set, this channel's interrupt will be masked in ISR, 159 * and the RX bufring will be drained before this channel's interrupt is 160 * unmasked. 161 * 162 * This flag is turned on by default. Drivers can turn it off according 163 * to their own requirement. 164 */ 165 #define VMBUS_CHAN_FLAG_BATCHREAD 0x0002 166 167 #define VMBUS_CHAN_TXF_HASMNF 0x0001 168 169 #define VMBUS_CHAN_ST_OPENED_SHIFT 0 170 #define VMBUS_CHAN_ST_ONPRIL_SHIFT 1 171 #define VMBUS_CHAN_ST_ONSUBL_SHIFT 2 172 #define VMBUS_CHAN_ST_ONLIST_SHIFT 3 173 #define VMBUS_CHAN_ST_REVOKED_SHIFT 4 /* sticky */ 174 #define VMBUS_CHAN_ST_OPENED (1 << VMBUS_CHAN_ST_OPENED_SHIFT) 175 #define VMBUS_CHAN_ST_ONPRIL (1 << VMBUS_CHAN_ST_ONPRIL_SHIFT) 176 #define VMBUS_CHAN_ST_ONSUBL (1 << VMBUS_CHAN_ST_ONSUBL_SHIFT) 177 #define VMBUS_CHAN_ST_ONLIST (1 << VMBUS_CHAN_ST_ONLIST_SHIFT) 178 #define VMBUS_CHAN_ST_REVOKED (1 << VMBUS_CHAN_ST_REVOKED_SHIFT) 179 180 struct vmbus_softc; 181 struct vmbus_message; 182 183 void vmbus_event_proc(struct vmbus_softc *, int); 184 void vmbus_event_proc_compat(struct vmbus_softc *, int); 185 void vmbus_chan_msgproc(struct vmbus_softc *, 186 const struct vmbus_message *); 187 void vmbus_chan_destroy_all(struct vmbus_softc *); 188 189 #endif /* !_VMBUS_CHANVAR_H_ */ 190