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];
167 /* Calculate the proper size of a ringbuffer, it must be page-aligned */
191 dsize = rbi->ring_datasize; in hv_get_bytes_to_read()
192 read_loc = rbi->ring_buffer->read_index; in hv_get_bytes_to_read()
193 write_loc = READ_ONCE(rbi->ring_buffer->write_index); in hv_get_bytes_to_read()
195 read = write_loc >= read_loc ? (write_loc - read_loc) : in hv_get_bytes_to_read()
196 (dsize - read_loc) + write_loc; in hv_get_bytes_to_read()
205 dsize = rbi->ring_datasize; in hv_get_bytes_to_write()
206 read_loc = READ_ONCE(rbi->ring_buffer->read_index); in hv_get_bytes_to_write()
207 write_loc = rbi->ring_buffer->write_index; in hv_get_bytes_to_write()
209 write = write_loc >= read_loc ? dsize - (write_loc - read_loc) : in hv_get_bytes_to_write()
210 read_loc - write_loc; in hv_get_bytes_to_write()
221 rbi->ring_size_div10_reciprocal); in hv_get_avail_to_write_percent()
230 * 2 . 4 (Windows 8)
232 * 4 . 0 (Windows 10)
233 * 4 . 1 (Windows 10 RS3)
241 #define VERSION_WIN8 ((2 << 16) | (4))
243 #define VERSION_WIN10 ((4 << 16) | (0))
244 #define VERSION_WIN10_V4_1 ((4 << 16) | (1))
256 /* The size of the user defined data buffer for non-pipe offers. */
263 * At the center of the Channel Management library is the Channel Offer. This
280 /* Non-pipes: The user has MAX_USER_DEFINED_BYTES bytes. */
288 * is implemented on top of standard user-defined data. Pipe
299 * primary channel and a value of non-zero means a sub-channel.
310 #define VMBUS_CHANNEL_SERVER_SUPPORTS_GPADLS 4
388 u32 reserved; /* for alignment to a 8-byte boundary */
392 * This is the format for a GPA-Direct packet, which contains a set of GPA
423 ((struct vmpacket_descriptor)__packet)->offset8 * 8)
426 ((((struct vmpacket_descriptor)__packet)->len8 - \
427 ((struct vmpacket_descriptor)__packet)->offset8) * 8)
430 (((struct IMPACT)__packet)->type)
458 CHANNELMSG_ALLOFFERS_DELIVERED = 4,
481 /* Hyper-V supports about 2048 channels, and the RELIDs start with 1. */
501 /* Offer Channel parameters */
518 * associated bit in the channel bitmap while sending the
537 return rbi->ring_buffer->pending_send_sz; in hv_ringbuffer_pending_size()
541 * Request Offer -- no parameters, SynIC message contains the partition ID
542 * Set Snoop -- no parameters, SynIC message contains the partition ID
543 * Clear Snoop -- no parameters, SynIC message contains the partition ID
544 * All Offers Delivered -- no parameters, SynIC message contains the partition
546 * Flush Client -- no parameters, SynIC message contains the partition ID
549 /* Open Channel parameters */
553 /* Identifies the specific VMBus channel that is being opened. */
556 /* ID making a particular open request at a channel offer unique. */
559 /* GPADL for the channel's ring buffer. */
566 * Prior to win8, incoming channel interrupts would only
579 /* User-specific data to be passed along to the server endpoint. */
583 /* Open Channel Result parameters */
591 /* Close channel parameters; */
597 /* Channel Message GPADL */
606 * follow-up packet that contains more.
664 /* Hyper-V socket: guest's connect()-ing to host */
671 /* Modify Channel parameters, cf. vmbus_send_modifychannel() */
689 * field in the host-returned Version Response Message.
704 * Represents each channel msg on the vmbus connection This is a
705 * variable-size data structure depending on the msg type itself
727 * The channel message that goes out on the "wire".
819 /* Channel callback's invoked in softirq context */
824 void (*change_target_cpu_callback)(struct vmbus_channel *channel,
828 * Synchronize channel scheduling and channel removal; see the inline
834 * A channel can be marked for one of three modes of reading:
835 * BATCHED - callback called from taslket and should read
836 * channel until empty. Interrupts from the host
838 * DIRECT - callback called from tasklet (softirq).
839 * ISR - callback called in interrupt context and must
841 * Host interrupts are disabled and must be re-enabled
858 * Prior to win8, incoming channel interrupts would only be
864 * Support for sub-channels. For high performance devices,
865 * it will be useful to have multiple sub-channels to support
867 * The support for sub-channels is implemented as an extention
869 * The initial offer is considered the primary channel and this
870 * offer message will indicate if the host supports sub-channels.
871 * The guest is free to ask for sub-channels to be offerred and can
872 * open these sub-channels as a normal "primary" channel. However,
873 * all sub-channels will have the same type and instance guids as the
874 * primary channel. Requests sent on a given channel will result in a
875 * response on the same channel.
879 * Sub-channel creation callback. This callback will be called in
880 * process context when a sub-channel offer is received from the host.
881 * The guest can open the sub-channel in the context of this callback.
886 * Channel rescind callback. Some channels (the hvsock ones), need to
889 void (*chn_rescind_callback)(struct vmbus_channel *channel);
892 * All Sub-channels of a primary channel are linked here.
896 * The primary channel this sub-channel belongs to.
897 * This will be NULL for the primary channel.
901 * Support per-channel state for use by vmbus drivers.
906 * Defer freeing channel until after all cpu's have
912 * For sysfs per-channel properties.
918 * etc,), Hyper-V has a mechanism to enhance the throughput
923 * of time is the monitor latency - currently around 100 usecs. This
926 * A) Making the host more efficient - each time it wakes up,
933 * latency. Furthermore, since the channel is shared for both
936 * time. To fix this issue, permit tagging the channel as being
946 * particular, in situations where the channel's device_obj has
953 * from the single-threaded vmbus_connection.work_queue to
977 /* enabling/disabling fuzz testing on the channel (default is false)*/
995 return !!(c->offermsg.offer.chn_flags & in is_hvsock_channel()
1001 return c->offermsg.offer.sub_channel_index != 0; in is_sub_channel()
1007 c->callback_mode = mode; in set_channel_read_mode()
1012 c->per_channel_state = s; in set_per_channel_state()
1017 return c->per_channel_state; in get_per_channel_state()
1026 spin_lock_irqsave(&c->outbound.ring_lock, flags); in set_channel_pending_send_size()
1027 ++c->out_full_total; in set_channel_pending_send_size()
1029 if (!c->out_full_flag) { in set_channel_pending_send_size()
1030 ++c->out_full_first; in set_channel_pending_send_size()
1031 c->out_full_flag = true; in set_channel_pending_send_size()
1033 spin_unlock_irqrestore(&c->outbound.ring_lock, flags); in set_channel_pending_send_size()
1035 c->out_full_flag = false; in set_channel_pending_send_size()
1038 c->outbound.ring_buffer->pending_send_sz = size; in set_channel_pending_send_size()
1043 c->low_latency = true; in set_low_latency_mode()
1048 c->low_latency = false; in clear_low_latency_mode()
1056 * APIs for managing sub-channels.
1062 void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel,
1066 * Check if sub-channels have already been offerred. This API will be useful
1067 * when the driver is unloaded after establishing sub-channels. In this case,
1068 * when the driver is re-loaded, the driver would have to check if the
1070 * the creation of sub-channels.
1074 * sub-channel creation.
1114 int vmbus_alloc_ring(struct vmbus_channel *channel,
1116 void vmbus_free_ring(struct vmbus_channel *channel);
1118 int vmbus_connect_ring(struct vmbus_channel *channel,
1121 int vmbus_disconnect_ring(struct vmbus_channel *channel);
1123 extern int vmbus_open(struct vmbus_channel *channel,
1131 extern void vmbus_close(struct vmbus_channel *channel);
1133 extern int vmbus_sendpacket(struct vmbus_channel *channel,
1140 extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
1147 extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
1154 extern int vmbus_establish_gpadl(struct vmbus_channel *channel,
1159 extern int vmbus_teardown_gpadl(struct vmbus_channel *channel,
1162 void vmbus_reset_channel_cb(struct vmbus_channel *channel);
1164 extern int vmbus_recvpacket(struct vmbus_channel *channel,
1170 extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
1185 * channel flag, actually doesn't mean a synthetic device because the
1189 * However, to facilitate the notification of new-offer/rescind-offer
1231 struct vmbus_channel *channel; member
1252 dev_set_drvdata(&dev->device, data); in hv_set_drvdata()
1257 return dev_get_drvdata(&dev->device); in hv_get_drvdata()
1280 void vmbus_hvsock_device_unregister(struct vmbus_channel *channel);
1289 * GUID definitions of various offer types - services offered to the guest.
1294 * {f8615163-df3e-46c5-913f-f2d2f965ed0e}
1302 * {32412632-86cb-44a2-9b5c-50d1417354f5}
1310 * {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}
1318 * {0e0b6031-5213-4934-818b-38d90ced39db}
1326 * {9527E630-D0AE-497b-ADCE-E80AB0175CAF}
1334 * {57164f39-9115-4e78-ab55-382f3bd5422d}
1342 * {a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}
1350 * {525074dc-8985-46e2-8057-a307dc18a502}
1358 * {cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}
1366 * {f912ad6d-2b17-48ea-bd65-f927a61c7684}
1380 * {DA0A7802-E377-4aac-8E77-0558EB1073F8}
1388 * {2f9bcc4a-0069-4af3-b76b-6fd0be528cda}
1396 * {34D14BE3-DEE4-41c8-9AE7-6B174977C192}
1405 * {8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}
1413 * {44C4F61D-4444-4400-9D52-802E27EDE19F}
1424 * {f8e65716-3cb3-4a06-9a60-1889c5cccab5}
1425 * {3375baf4-9e15-4b30-b765-67acb10d607b}
1426 * {276aacf4-ac15-426c-98dd-7521ad3f01fe}
1442 * Common header for Hyper-V ICs
1449 #define ICMSGTYPE_TIMESYNC 4
1454 #define ICMSGHDRFLAG_RESPONSE 4
1465 void *channel; member
1544 struct vmbus_channel *channel; member
1554 void hv_process_channel_removal(struct vmbus_channel *channel);
1556 void vmbus_setevent(struct vmbus_channel *channel);
1566 void vmbus_set_event(struct vmbus_channel *channel);
1572 return ring_info->ring_buffer->buffer; in hv_get_ring_buffer()
1580 rbi->ring_buffer->interrupt_mask = 1; in hv_begin_read()
1587 * Re-enable host callback and return number of outstanding bytes
1592 rbi->ring_buffer->interrupt_mask = 0; in hv_end_read()
1606 * An API to support in-place processing of incoming VMBUS packets.
1612 return (void *)((unsigned long)desc + (desc->offset8 << 3)); in hv_pkt_data()
1618 return (desc->len8 << 3) - (desc->offset8 << 3); in hv_pkt_datalen()
1623 hv_pkt_iter_first(struct vmbus_channel *channel);
1626 __hv_pkt_iter_next(struct vmbus_channel *channel,
1629 void hv_pkt_iter_close(struct vmbus_channel *channel);
1636 hv_pkt_iter_next(struct vmbus_channel *channel, in hv_pkt_iter_next() argument
1641 nxt = __hv_pkt_iter_next(channel, pkt); in hv_pkt_iter_next()
1643 hv_pkt_iter_close(channel); in hv_pkt_iter_next()
1648 #define foreach_vmbus_pkt(pkt, channel) \ argument
1649 for (pkt = hv_pkt_iter_first(channel); pkt; \
1650 pkt = hv_pkt_iter_next(channel, pkt))
1653 * Interface for passing data between SR-IOV PF and VF drivers. The VF driver
1696 #define HVPFN_UP(x) (((x) + HV_HYP_PAGE_SIZE-1) >> HV_HYP_PAGE_SHIFT)