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[client] input: send reports over LGMP

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Use the LGMP input queue when the host advertises transport input,
while preserving SPICE fallback through the existing input abstraction.

Claim input lazily, publish ordered full-state keyboard and mouse
reports without blocking rendering, and keep the owner lease alive.
Reserve queue capacity for discrete transitions, coalesce only motion
under pressure, and release ownership safely during idle and disconnect.

Keep the Linux-to-HID map in the client and update LGMP to the
nonblocking data-send API required by the input worker.
This commit is contained in:
Geoffrey McRae
2026-08-09 01:03:41 +10:00
parent 726086a969
commit 27a938e741
10 changed files with 1118 additions and 2 deletions
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28
client/transports/LGMP/lgmp.c
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@@ -20,6 +20,8 @@
#include "interface/transport.h"
#include "input.h"
#include "common/KVMFR.h"
#include "common/LGMPConfig.h"
#include "common/debug.h"
@@ -66,6 +68,7 @@ struct LG_Transport
PLGMPClientQueue frameQueue;
PLGMPClientQueue ownerFrameQueue[LGMP_Q_FRAME_LEN];
PLGMPClientQueue pointerQueue;
LGMPInput * input;
LG_Lock frameLock;
LG_Lock pointerLock;
@@ -75,6 +78,7 @@ struct LG_Transport
bool connected;
bool frameStopRequested;
bool frameScheduleSupported;
bool inputSupported;
uint64_t frameLeaseHandle;
uint32_t frameGeneration;
uint32_t clientID;
@@ -232,6 +236,16 @@ static bool lgmp_create(LG_Transport ** result)
return false;
}
if (!lgmpInput_create(this->client, &this->input))
{
lgmpClientFree(&this->client);
ivshmemClose(&this->shm);
LG_LOCK_FREE(this->frameLock);
LG_LOCK_FREE(this->pointerLock);
free(this);
return false;
}
*result = this;
return true;
}
@@ -357,6 +371,7 @@ static void lgmp_destroy(LG_Transport ** transport)
return;
struct LG_Transport * this = *transport;
lgmpInput_destroy(&this->input);
lgmp_closeQueues(this);
lgmp_closeDMA(this);
free(this->pointerData);
@@ -390,6 +405,8 @@ static bool lgmp_parseSession(const uint8_t * data, uint32_t size,
session->features |= LG_TRANSPORT_FEATURE_WINDOW_SIZE;
if (header->features & KVMFR_FEATURE_FRAME_SCHEDULE)
session->features |= LG_TRANSPORT_FEATURE_FRAME_SCHEDULE;
if (header->features & KVMFR_FEATURE_INPUT)
session->features |= LG_TRANSPORT_FEATURE_INPUT;
data += sizeof(*header);
size -= sizeof(*header);
@@ -468,6 +485,8 @@ static LG_TransportStatus lgmp_connect(LG_Transport * this,
this->frameStopRequested = false;
this->frameScheduleSupported =
session->features & LG_TRANSPORT_FEATURE_FRAME_SCHEDULE;
this->inputSupported =
session->features & LG_TRANSPORT_FEATURE_INPUT;
this->frameSerial = 0;
this->frameSerialValid = false;
this->formatValid = false;
@@ -489,6 +508,7 @@ static LG_TransportStatus lgmp_connect(LG_Transport * this,
static void lgmp_disconnect(LG_Transport * this)
{
lgmpInput_disconnect(this->input);
lgmp_closeQueues(this);
LG_LOCK(this->frameLock);
@@ -499,6 +519,7 @@ static void lgmp_disconnect(LG_Transport * this)
this->ownerFrameQueue[i] = NULL;
this->connected = false;
this->frameScheduleSupported = false;
this->inputSupported = false;
this->clientID = 0;
LG_UNLOCK(this->frameLock);
@@ -1331,7 +1352,12 @@ static const LG_InputOps * lgmp_getInputOps(LG_Transport * this,
void ** opaque)
{
*opaque = NULL;
return NULL;
if (!this->connected || !this->inputSupported ||
!lgmpInput_connect(this->input))
return NULL;
*opaque = this->input;
return lgmpInput_getOps();
}
const LG_TransportOps LGT_LGMP =