Lines Matching +full:4 +full:- +full:channel
1 /* SPDX-License-Identifier: GPL-2.0-only */
27 #include <asm/hyperv-tlfs.h>
48 * gva: |-- 64k --|-- 64k --| ... |
49 * gpa: | 4k | 4k | ... | 4k | 4k | 4k | ... | 4k |
53 * gpadl: | 4k | 4k | ... | 4k | 4k | 4k | ... | 4k | ... |
59 * gva: |-- 64k --|-- 64k --| ... |-- 64k --|-- 64k --| ... |
60 * gpa: | 4k | .. | 4k | 4k | ... | 4k | ... | 4k | .. | 4k | .. | ... |
68 * gpadl: | 4k | 4k | ... | ... | 4k | 4k | ... |
69 * index: 0 1 2 ... 16 ... n-15 n-14 n-13 ... 2n-30
76 /* Single-page buffer */
83 /* Multiple-page buffer */
92 * Multiple-page buffer array; the pfn array is variable size:
123 * WS2012/Win8 and later versions of Hyper-V implement interrupt
125 * is set by the host on the host->guest ring buffer, and by the
126 * guest on the guest->host ring buffer.
130 * the feature bit in the guest->host ring buffer, the guest is
132 * 1) It will set the pending_send_sz field in the guest->host ring
134 * 2) It will read the pending_send_sz field in the host->guest
137 * Similarly, if the host sets the feature bit in the host->guest
139 * 1) It will set the pending_send_sz field in the host->guest ring
141 * 2) It will read the pending_send_sz field in the guest->host
158 u8 reserved2[PAGE_SIZE - 68];
175 * relatively small header (4 Kbytes on x86) to a large-ish power-of-2 ring
187 /* Calculate the proper size of a ringbuffer, it must be page-aligned */
215 dsize = rbi->ring_datasize; in hv_get_bytes_to_read()
216 read_loc = rbi->ring_buffer->read_index; in hv_get_bytes_to_read()
217 write_loc = READ_ONCE(rbi->ring_buffer->write_index); in hv_get_bytes_to_read()
219 read = write_loc >= read_loc ? (write_loc - read_loc) : in hv_get_bytes_to_read()
220 (dsize - read_loc) + write_loc; in hv_get_bytes_to_read()
229 dsize = rbi->ring_datasize; in hv_get_bytes_to_write()
230 read_loc = READ_ONCE(rbi->ring_buffer->read_index); in hv_get_bytes_to_write()
231 write_loc = rbi->ring_buffer->write_index; in hv_get_bytes_to_write()
233 write = write_loc >= read_loc ? dsize - (write_loc - read_loc) : in hv_get_bytes_to_write()
234 read_loc - write_loc; in hv_get_bytes_to_write()
245 rbi->ring_size_div10_reciprocal); in hv_get_avail_to_write_percent()
254 * 2 . 4 (Windows 8, WS2012)
256 * 4 . 0 (Windows 10)
257 * 4 . 1 (Windows 10 RS3)
270 #define VERSION_WIN8 ((2 << 16) | (4))
272 #define VERSION_WIN10 ((4 << 16) | (0))
273 #define VERSION_WIN10_V4_1 ((4 << 16) | (1))
286 /* The size of the user defined data buffer for non-pipe offers. */
293 * At the center of the Channel Management library is the Channel Offer. This
310 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
318 * is implemented on top of standard user-defined data. Pipe
329 * primary channel and a value of non-zero means a sub-channel.
340 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
418 u32 reserved; /* for alignment to a 8-byte boundary */
422 * This is the format for a GPA-Direct packet, which contains a set of GPA
453 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
456 ((((struct vmpacket_descriptor)__packet)->len8 - \
457 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
460 (((struct IMPACT)__packet)->type)
488 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
512 /* Hyper-V supports about 2048 channels, and the RELIDs start with 1. */
532 /* Offer Channel parameters */
549 * associated bit in the channel bitmap while sending the
566 * Request Offer -- no parameters, SynIC message contains the partition ID
567 * Set Snoop -- no parameters, SynIC message contains the partition ID
568 * Clear Snoop -- no parameters, SynIC message contains the partition ID
569 * All Offers Delivered -- no parameters, SynIC message contains the partition
571 * Flush Client -- no parameters, SynIC message contains the partition ID
574 /* Open Channel parameters */
578 /* Identifies the specific VMBus channel that is being opened. */
581 /* ID making a particular open request at a channel offer unique. */
584 /* GPADL for the channel's ring buffer. */
591 * Prior to win8, incoming channel interrupts would only
604 /* User-specific data to be passed along to the server endpoint. */
608 /* Open Channel Result parameters */
616 /* Modify Channel Result parameters */
623 /* Close channel parameters; */
629 /* Channel Message GPADL */
638 * follow-up packet that contains more.
696 /* Hyper-V socket: guest's connect()-ing to host */
703 /* Modify Channel parameters, cf. vmbus_send_modifychannel() */
721 * field in the host-returned Version Response Message.
736 * Represents each channel msg on the vmbus connection This is a
737 * variable-size data structure depending on the msg type itself
760 * The channel message that goes out on the "wire".
814 #define VMBUS_RQST_ERROR (U64_MAX - 1)
816 /* NetVSC-specific */
817 #define VMBUS_RQST_ID_NO_RESPONSE (U64_MAX - 2)
818 /* StorVSC-specific */
819 #define VMBUS_RQST_INIT (U64_MAX - 2)
820 #define VMBUS_RQST_RESET (U64_MAX - 3)
856 bool rescind_ref; /* got rescind msg, got channel reference */
887 /* Channel callback's invoked in softirq context */
892 void (*change_target_cpu_callback)(struct vmbus_channel *channel,
896 * Synchronize channel scheduling and channel removal; see the inline
902 * A channel can be marked for one of three modes of reading:
903 * BATCHED - callback called from taslket and should read
904 * channel until empty. Interrupts from the host
906 * DIRECT - callback called from tasklet (softirq).
907 * ISR - callback called in interrupt context and must
909 * Host interrupts are disabled and must be re-enabled
926 * Prior to win8, incoming channel interrupts would only be
932 * Support for sub-channels. For high performance devices,
933 * it will be useful to have multiple sub-channels to support
935 * The support for sub-channels is implemented as an extension
937 * The initial offer is considered the primary channel and this
938 * offer message will indicate if the host supports sub-channels.
939 * The guest is free to ask for sub-channels to be offered and can
940 * open these sub-channels as a normal "primary" channel. However,
941 * all sub-channels will have the same type and instance guids as the
942 * primary channel. Requests sent on a given channel will result in a
943 * response on the same channel.
947 * Sub-channel creation callback. This callback will be called in
948 * process context when a sub-channel offer is received from the host.
949 * The guest can open the sub-channel in the context of this callback.
954 * Channel rescind callback. Some channels (the hvsock ones), need to
957 void (*chn_rescind_callback)(struct vmbus_channel *channel);
960 * All Sub-channels of a primary channel are linked here.
964 * The primary channel this sub-channel belongs to.
965 * This will be NULL for the primary channel.
969 * Support per-channel state for use by vmbus drivers.
974 * Defer freeing channel until after all cpu's have
980 * For sysfs per-channel properties.
986 * etc,), Hyper-V has a mechanism to enhance the throughput
991 * of time is the monitor latency - currently around 100 usecs. This
994 * A) Making the host more efficient - each time it wakes up,
1001 * latency. Furthermore, since the channel is shared for both
1004 * time. To fix this issue, permit tagging the channel as being
1014 * particular, in situations where the channel's device_obj has
1021 * from the single-threaded vmbus_connection.work_queue to
1045 /* enabling/disabling fuzz testing on the channel (default is false)*/
1060 u64 (*next_request_id_callback)(struct vmbus_channel *channel, u64 rqst_addr);
1062 u64 (*request_addr_callback)(struct vmbus_channel *channel, u64 rqst_id);
1068 /* The max size of a packet on this channel */
1072 #define lock_requestor(channel, flags) \ argument
1074 struct vmbus_requestor *rqstor = &(channel)->requestor; \
1076 spin_lock_irqsave(&rqstor->req_lock, flags); \
1079 static __always_inline void unlock_requestor(struct vmbus_channel *channel, in unlock_requestor() argument
1082 struct vmbus_requestor *rqstor = &channel->requestor; in unlock_requestor()
1084 spin_unlock_irqrestore(&rqstor->req_lock, flags); in unlock_requestor()
1087 u64 vmbus_next_request_id(struct vmbus_channel *channel, u64 rqst_addr);
1088 u64 __vmbus_request_addr_match(struct vmbus_channel *channel, u64 trans_id,
1090 u64 vmbus_request_addr_match(struct vmbus_channel *channel, u64 trans_id,
1092 u64 vmbus_request_addr(struct vmbus_channel *channel, u64 trans_id);
1096 return !!(o->offer.chn_flags & VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER); in is_hvsock_offer()
1101 return is_hvsock_offer(&c->offermsg); in is_hvsock_channel()
1106 return c->offermsg.offer.sub_channel_index != 0; in is_sub_channel()
1112 c->callback_mode = mode; in set_channel_read_mode()
1117 c->per_channel_state = s; in set_per_channel_state()
1122 return c->per_channel_state; in get_per_channel_state()
1131 spin_lock_irqsave(&c->outbound.ring_lock, flags); in set_channel_pending_send_size()
1132 ++c->out_full_total; in set_channel_pending_send_size()
1134 if (!c->out_full_flag) { in set_channel_pending_send_size()
1135 ++c->out_full_first; in set_channel_pending_send_size()
1136 c->out_full_flag = true; in set_channel_pending_send_size()
1138 spin_unlock_irqrestore(&c->outbound.ring_lock, flags); in set_channel_pending_send_size()
1140 c->out_full_flag = false; in set_channel_pending_send_size()
1143 c->outbound.ring_buffer->pending_send_sz = size; in set_channel_pending_send_size()
1151 * APIs for managing sub-channels.
1157 void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel,
1196 int vmbus_alloc_ring(struct vmbus_channel *channel,
1198 void vmbus_free_ring(struct vmbus_channel *channel);
1200 int vmbus_connect_ring(struct vmbus_channel *channel,
1203 int vmbus_disconnect_ring(struct vmbus_channel *channel);
1205 extern int vmbus_open(struct vmbus_channel *channel,
1213 extern void vmbus_close(struct vmbus_channel *channel);
1215 extern int vmbus_sendpacket_getid(struct vmbus_channel *channel,
1222 extern int vmbus_sendpacket(struct vmbus_channel *channel,
1229 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
1236 extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
1243 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
1248 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
1251 void vmbus_reset_channel_cb(struct vmbus_channel *channel);
1253 extern int vmbus_recvpacket(struct vmbus_channel *channel,
1259 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
1271 * channel flag, actually doesn't mean a synthetic device because the
1275 * However, to facilitate the notification of new-offer/rescind-offer
1321 struct vmbus_channel *channel; member
1337 dev_set_drvdata(&dev->device, data); in hv_set_drvdata()
1342 return dev_get_drvdata(&dev->device); in hv_get_drvdata()
1357 bool hv_ringbuffer_spinlock_busy(struct vmbus_channel *channel);
1367 void vmbus_hvsock_device_unregister(struct vmbus_channel *channel);
1376 * GUID definitions of various offer types - services offered to the guest.
1381 * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
1389 * {32412632-86cb-44a2-9b5c-50d1417354f5}
1397 * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
1405 * {0e0b6031-5213-4934-818b-38d90ced39db}
1413 * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
1421 * {57164f39-9115-4e78-ab55-382f3bd5422d}
1429 * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
1437 * {525074dc-8985-46e2-8057-a307dc18a502}
1445 * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
1453 * {f912ad6d-2b17-48ea-bd65-f927a61c7684}
1467 * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
1475 * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
1483 * {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
1492 * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}
1500 * {44C4F61D-4444-4400-9D52-802E27EDE19F}
1508 * Linux doesn't support these 4 devices: the first two are for
1512 * {f8e65716-3cb3-4a06-9a60-1889c5cccab5}
1513 * {3375baf4-9e15-4b30-b765-67acb10d607b}
1514 * {276aacf4-ac15-426c-98dd-7521ad3f01fe}
1515 * {c376c1c3-d276-48d2-90a9-c04748072c60}
1535 * Common header for Hyper-V ICs
1542 #define ICMSGTYPE_TIMESYNC 4
1548 #define ICMSGHDRFLAG_RESPONSE 4
1559 void *channel; member
1644 struct vmbus_channel *channel; member
1659 void hv_process_channel_removal(struct vmbus_channel *channel);
1661 void vmbus_setevent(struct vmbus_channel *channel);
1670 int vmbus_send_modifychannel(struct vmbus_channel *channel, u32 target_vp);
1671 void vmbus_set_event(struct vmbus_channel *channel);
1677 return ring_info->ring_buffer->buffer; in hv_get_ring_buffer()
1685 rbi->ring_buffer->interrupt_mask = 1; in hv_begin_read()
1692 * Re-enable host callback and return number of outstanding bytes
1697 rbi->ring_buffer->interrupt_mask = 0; in hv_end_read()
1711 * An API to support in-place processing of incoming VMBUS packets.
1717 return (void *)((unsigned long)desc + (desc->offset8 << 3)); in hv_pkt_data()
1723 return (desc->len8 << 3) - (desc->offset8 << 3); in hv_pkt_datalen()
1729 return desc->len8 << 3; in hv_pkt_len()
1733 hv_pkt_iter_first(struct vmbus_channel *channel);
1736 __hv_pkt_iter_next(struct vmbus_channel *channel,
1739 void hv_pkt_iter_close(struct vmbus_channel *channel);
1742 hv_pkt_iter_next(struct vmbus_channel *channel, in hv_pkt_iter_next() argument
1747 nxt = __hv_pkt_iter_next(channel, pkt); in hv_pkt_iter_next()
1749 hv_pkt_iter_close(channel); in hv_pkt_iter_next()
1754 #define foreach_vmbus_pkt(pkt, channel) \ argument
1755 for (pkt = hv_pkt_iter_first(channel); pkt; \
1756 pkt = hv_pkt_iter_next(channel, pkt))
1759 * Interface for passing data between SR-IOV PF and VF drivers. The VF driver
1802 #define HVPFN_UP(x) (((x) + HV_HYP_PAGE_SIZE-1) >> HV_HYP_PAGE_SHIFT)