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xserver-multidpi/randr/randr.c
Keith Packard 1ef7aed3e2 During reset/shutdown, clean up leases in DIX instead of each driver 
Instead of having every video driver loop over any pending leases to
free them during CloseScreen, do this up in the DIX layer by
terminating leases when a leased CRTC or Output is destroyed and
(just to make sure), also terminating leases in RRCloseScreen. The
latter should "never" get invoked as any lease should be associated
with a resource which was destroyed.

This is required as by the time the driver's CloseScreen function is
invoked, we've already freed all of the DIX randr structures and no
longer have any way to reference the leases

Signed-off-by: Keith Packard <keithp@keithp.com>
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=106960
Cc: Thomas Hellstrom <thellstrom@vmware.com>
2018-08-02 10:15:26 -04:00

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/*
* Copyright © 2000 Compaq Computer Corporation
* Copyright © 2002 Hewlett-Packard Company
* Copyright © 2006 Intel Corporation
* Copyright © 2017 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*
* Author: Jim Gettys, Hewlett-Packard Company, Inc.
* Keith Packard, Intel Corporation
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "randrstr.h"
#include "extinit.h"
/* From render.h */
#ifndef SubPixelUnknown
#define SubPixelUnknown 0
#endif
#define RR_VALIDATE
static int RRNScreens;
#define wrap(priv,real,mem,func) {\
priv->mem = real->mem; \
real->mem = func; \
}
#define unwrap(priv,real,mem) {\
real->mem = priv->mem; \
}
static int ProcRRDispatch(ClientPtr pClient);
static int SProcRRDispatch(ClientPtr pClient);
int RREventBase;
int RRErrorBase;
RESTYPE RRClientType, RREventType; /* resource types for event masks */
DevPrivateKeyRec RRClientPrivateKeyRec;
DevPrivateKeyRec rrPrivKeyRec;
static void
RRClientCallback(CallbackListPtr *list, void *closure, void *data)
{
NewClientInfoRec *clientinfo = (NewClientInfoRec *) data;
ClientPtr pClient = clientinfo->client;
rrClientPriv(pClient);
RRTimesPtr pTimes = (RRTimesPtr) (pRRClient + 1);
int i;
pRRClient->major_version = 0;
pRRClient->minor_version = 0;
for (i = 0; i < screenInfo.numScreens; i++) {
ScreenPtr pScreen = screenInfo.screens[i];
rrScrPriv(pScreen);
if (pScrPriv) {
pTimes[i].setTime = pScrPriv->lastSetTime;
pTimes[i].configTime = pScrPriv->lastConfigTime;
}
}
}
static Bool
RRCloseScreen(ScreenPtr pScreen)
{
rrScrPriv(pScreen);
int j;
RRLeasePtr lease, next;
unwrap(pScrPriv, pScreen, CloseScreen);
xorg_list_for_each_entry_safe(lease, next, &pScrPriv->leases, list)
RRTerminateLease(lease);
for (j = pScrPriv->numCrtcs - 1; j >= 0; j--)
RRCrtcDestroy(pScrPriv->crtcs[j]);
for (j = pScrPriv->numOutputs - 1; j >= 0; j--)
RROutputDestroy(pScrPriv->outputs[j]);
if (pScrPriv->provider)
RRProviderDestroy(pScrPriv->provider);
RRMonitorClose(pScreen);
free(pScrPriv->crtcs);
free(pScrPriv->outputs);
free(pScrPriv);
RRNScreens -= 1; /* ok, one fewer screen with RandR running */
return (*pScreen->CloseScreen) (pScreen);
}
static void
SRRScreenChangeNotifyEvent(xRRScreenChangeNotifyEvent * from,
xRRScreenChangeNotifyEvent * to)
{
to->type = from->type;
to->rotation = from->rotation;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->configTimestamp, to->configTimestamp);
cpswapl(from->root, to->root);
cpswapl(from->window, to->window);
cpswaps(from->sizeID, to->sizeID);
cpswaps(from->subpixelOrder, to->subpixelOrder);
cpswaps(from->widthInPixels, to->widthInPixels);
cpswaps(from->heightInPixels, to->heightInPixels);
cpswaps(from->widthInMillimeters, to->widthInMillimeters);
cpswaps(from->heightInMillimeters, to->heightInMillimeters);
}
static void
SRRCrtcChangeNotifyEvent(xRRCrtcChangeNotifyEvent * from,
xRRCrtcChangeNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->window, to->window);
cpswapl(from->crtc, to->crtc);
cpswapl(from->mode, to->mode);
cpswaps(from->rotation, to->rotation);
/* pad1 */
cpswaps(from->x, to->x);
cpswaps(from->y, to->y);
cpswaps(from->width, to->width);
cpswaps(from->height, to->height);
}
static void
SRROutputChangeNotifyEvent(xRROutputChangeNotifyEvent * from,
xRROutputChangeNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->configTimestamp, to->configTimestamp);
cpswapl(from->window, to->window);
cpswapl(from->output, to->output);
cpswapl(from->crtc, to->crtc);
cpswapl(from->mode, to->mode);
cpswaps(from->rotation, to->rotation);
to->connection = from->connection;
to->subpixelOrder = from->subpixelOrder;
}
static void
SRROutputPropertyNotifyEvent(xRROutputPropertyNotifyEvent * from,
xRROutputPropertyNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->window, to->window);
cpswapl(from->output, to->output);
cpswapl(from->atom, to->atom);
cpswapl(from->timestamp, to->timestamp);
to->state = from->state;
/* pad1 */
/* pad2 */
/* pad3 */
/* pad4 */
}
static void
SRRProviderChangeNotifyEvent(xRRProviderChangeNotifyEvent * from,
xRRProviderChangeNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->window, to->window);
cpswapl(from->provider, to->provider);
}
static void
SRRProviderPropertyNotifyEvent(xRRProviderPropertyNotifyEvent * from,
xRRProviderPropertyNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->window, to->window);
cpswapl(from->provider, to->provider);
cpswapl(from->atom, to->atom);
cpswapl(from->timestamp, to->timestamp);
to->state = from->state;
/* pad1 */
/* pad2 */
/* pad3 */
/* pad4 */
}
static void _X_COLD
SRRResourceChangeNotifyEvent(xRRResourceChangeNotifyEvent * from,
xRRResourceChangeNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->window, to->window);
}
static void _X_COLD
SRRLeaseNotifyEvent(xRRLeaseNotifyEvent * from,
xRRLeaseNotifyEvent * to)
{
to->type = from->type;
to->subCode = from->subCode;
cpswaps(from->sequenceNumber, to->sequenceNumber);
cpswapl(from->timestamp, to->timestamp);
cpswapl(from->window, to->window);
cpswapl(from->lease, to->lease);
to->created = from->created;
}
static void _X_COLD
SRRNotifyEvent(xEvent *from, xEvent *to)
{
switch (from->u.u.detail) {
case RRNotify_CrtcChange:
SRRCrtcChangeNotifyEvent((xRRCrtcChangeNotifyEvent *) from,
(xRRCrtcChangeNotifyEvent *) to);
break;
case RRNotify_OutputChange:
SRROutputChangeNotifyEvent((xRROutputChangeNotifyEvent *) from,
(xRROutputChangeNotifyEvent *) to);
break;
case RRNotify_OutputProperty:
SRROutputPropertyNotifyEvent((xRROutputPropertyNotifyEvent *) from,
(xRROutputPropertyNotifyEvent *) to);
break;
case RRNotify_ProviderChange:
SRRProviderChangeNotifyEvent((xRRProviderChangeNotifyEvent *) from,
(xRRProviderChangeNotifyEvent *) to);
break;
case RRNotify_ProviderProperty:
SRRProviderPropertyNotifyEvent((xRRProviderPropertyNotifyEvent *) from,
(xRRProviderPropertyNotifyEvent *) to);
break;
case RRNotify_ResourceChange:
SRRResourceChangeNotifyEvent((xRRResourceChangeNotifyEvent *) from,
(xRRResourceChangeNotifyEvent *) to);
break;
case RRNotify_Lease:
SRRLeaseNotifyEvent((xRRLeaseNotifyEvent *) from,
(xRRLeaseNotifyEvent *) to);
break;
default:
break;
}
}
static int RRGeneration;
Bool
RRInit(void)
{
if (RRGeneration != serverGeneration) {
if (!RRModeInit())
return FALSE;
if (!RRCrtcInit())
return FALSE;
if (!RROutputInit())
return FALSE;
if (!RRProviderInit())
return FALSE;
if (!RRLeaseInit())
return FALSE;
RRGeneration = serverGeneration;
}
if (!dixRegisterPrivateKey(&rrPrivKeyRec, PRIVATE_SCREEN, 0))
return FALSE;
return TRUE;
}
Bool
RRScreenInit(ScreenPtr pScreen)
{
rrScrPrivPtr pScrPriv;
if (!RRInit())
return FALSE;
pScrPriv = (rrScrPrivPtr) calloc(1, sizeof(rrScrPrivRec));
if (!pScrPriv)
return FALSE;
SetRRScreen(pScreen, pScrPriv);
/*
* Calling function best set these function vectors
*/
pScrPriv->rrGetInfo = 0;
pScrPriv->maxWidth = pScrPriv->minWidth = pScreen->width;
pScrPriv->maxHeight = pScrPriv->minHeight = pScreen->height;
pScrPriv->width = pScreen->width;
pScrPriv->height = pScreen->height;
pScrPriv->mmWidth = pScreen->mmWidth;
pScrPriv->mmHeight = pScreen->mmHeight;
#if RANDR_12_INTERFACE
pScrPriv->rrScreenSetSize = NULL;
pScrPriv->rrCrtcSet = NULL;
pScrPriv->rrCrtcSetGamma = NULL;
#endif
#if RANDR_10_INTERFACE
pScrPriv->rrSetConfig = 0;
pScrPriv->rotations = RR_Rotate_0;
pScrPriv->reqWidth = pScreen->width;
pScrPriv->reqHeight = pScreen->height;
pScrPriv->nSizes = 0;
pScrPriv->pSizes = NULL;
pScrPriv->rotation = RR_Rotate_0;
pScrPriv->rate = 0;
pScrPriv->size = 0;
#endif
/*
* This value doesn't really matter -- any client must call
* GetScreenInfo before reading it which will automatically update
* the time
*/
pScrPriv->lastSetTime = currentTime;
pScrPriv->lastConfigTime = currentTime;
wrap(pScrPriv, pScreen, CloseScreen, RRCloseScreen);
pScreen->ConstrainCursorHarder = RRConstrainCursorHarder;
pScreen->ReplaceScanoutPixmap = RRReplaceScanoutPixmap;
pScrPriv->numOutputs = 0;
pScrPriv->outputs = NULL;
pScrPriv->numCrtcs = 0;
pScrPriv->crtcs = NULL;
xorg_list_init(&pScrPriv->leases);
RRMonitorInit(pScreen);
RRNScreens += 1; /* keep count of screens that implement randr */
return TRUE;
}
/*ARGSUSED*/ static int
RRFreeClient(void *data, XID id)
{
RREventPtr pRREvent;
WindowPtr pWin;
RREventPtr *pHead, pCur, pPrev;
pRREvent = (RREventPtr) data;
pWin = pRREvent->window;
dixLookupResourceByType((void **) &pHead, pWin->drawable.id,
RREventType, serverClient, DixDestroyAccess);
if (pHead) {
pPrev = 0;
for (pCur = *pHead; pCur && pCur != pRREvent; pCur = pCur->next)
pPrev = pCur;
if (pCur) {
if (pPrev)
pPrev->next = pRREvent->next;
else
*pHead = pRREvent->next;
}
}
free((void *) pRREvent);
return 1;
}
/*ARGSUSED*/ static int
RRFreeEvents(void *data, XID id)
{
RREventPtr *pHead, pCur, pNext;
pHead = (RREventPtr *) data;
for (pCur = *pHead; pCur; pCur = pNext) {
pNext = pCur->next;
FreeResource(pCur->clientResource, RRClientType);
free((void *) pCur);
}
free((void *) pHead);
return 1;
}
void
RRExtensionInit(void)
{
ExtensionEntry *extEntry;
if (RRNScreens == 0)
return;
if (!dixRegisterPrivateKey(&RRClientPrivateKeyRec, PRIVATE_CLIENT,
sizeof(RRClientRec) +
screenInfo.numScreens * sizeof(RRTimesRec)))
return;
if (!AddCallback(&ClientStateCallback, RRClientCallback, 0))
return;
RRClientType = CreateNewResourceType(RRFreeClient, "RandRClient");
if (!RRClientType)
return;
RREventType = CreateNewResourceType(RRFreeEvents, "RandREvent");
if (!RREventType)
return;
extEntry = AddExtension(RANDR_NAME, RRNumberEvents, RRNumberErrors,
ProcRRDispatch, SProcRRDispatch,
NULL, StandardMinorOpcode);
if (!extEntry)
return;
RRErrorBase = extEntry->errorBase;
RREventBase = extEntry->eventBase;
EventSwapVector[RREventBase + RRScreenChangeNotify] = (EventSwapPtr)
SRRScreenChangeNotifyEvent;
EventSwapVector[RREventBase + RRNotify] = (EventSwapPtr)
SRRNotifyEvent;
RRModeInitErrorValue();
RRCrtcInitErrorValue();
RROutputInitErrorValue();
RRProviderInitErrorValue();
#ifdef PANORAMIX
RRXineramaExtensionInit();
#endif
}
void
RRResourcesChanged(ScreenPtr pScreen)
{
rrScrPriv(pScreen);
pScrPriv->resourcesChanged = TRUE;
RRSetChanged(pScreen);
}
static void
RRDeliverResourceEvent(ClientPtr client, WindowPtr pWin)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
rrScrPriv(pScreen);
xRRResourceChangeNotifyEvent re = {
.type = RRNotify + RREventBase,
.subCode = RRNotify_ResourceChange,
.timestamp = pScrPriv->lastSetTime.milliseconds,
.window = pWin->drawable.id
};
WriteEventsToClient(client, 1, (xEvent *) &re);
}
static int
TellChanged(WindowPtr pWin, void *value)
{
RREventPtr *pHead, pRREvent;
ClientPtr client;
ScreenPtr pScreen = pWin->drawable.pScreen;
ScreenPtr iter;
rrScrPrivPtr pSlaveScrPriv;
rrScrPriv(pScreen);
int i;
dixLookupResourceByType((void **) &pHead, pWin->drawable.id,
RREventType, serverClient, DixReadAccess);
if (!pHead)
return WT_WALKCHILDREN;
for (pRREvent = *pHead; pRREvent; pRREvent = pRREvent->next) {
client = pRREvent->client;
if (client == serverClient || client->clientGone)
continue;
if (pRREvent->mask & RRScreenChangeNotifyMask)
RRDeliverScreenEvent(client, pWin, pScreen);
if (pRREvent->mask & RRCrtcChangeNotifyMask) {
for (i = 0; i < pScrPriv->numCrtcs; i++) {
RRCrtcPtr crtc = pScrPriv->crtcs[i];
if (crtc->changed)
RRDeliverCrtcEvent(client, pWin, crtc);
}
xorg_list_for_each_entry(iter, &pScreen->slave_list, slave_head) {
if (!iter->is_output_slave)
continue;
pSlaveScrPriv = rrGetScrPriv(iter);
for (i = 0; i < pSlaveScrPriv->numCrtcs; i++) {
RRCrtcPtr crtc = pSlaveScrPriv->crtcs[i];
if (crtc->changed)
RRDeliverCrtcEvent(client, pWin, crtc);
}
}
}
if (pRREvent->mask & RROutputChangeNotifyMask) {
for (i = 0; i < pScrPriv->numOutputs; i++) {
RROutputPtr output = pScrPriv->outputs[i];
if (output->changed)
RRDeliverOutputEvent(client, pWin, output);
}
xorg_list_for_each_entry(iter, &pScreen->slave_list, slave_head) {
if (!iter->is_output_slave)
continue;
pSlaveScrPriv = rrGetScrPriv(iter);
for (i = 0; i < pSlaveScrPriv->numOutputs; i++) {
RROutputPtr output = pSlaveScrPriv->outputs[i];
if (output->changed)
RRDeliverOutputEvent(client, pWin, output);
}
}
}
if (pRREvent->mask & RRProviderChangeNotifyMask) {
xorg_list_for_each_entry(iter, &pScreen->slave_list, slave_head) {
pSlaveScrPriv = rrGetScrPriv(iter);
if (pSlaveScrPriv->provider->changed)
RRDeliverProviderEvent(client, pWin, pSlaveScrPriv->provider);
}
}
if (pRREvent->mask & RRResourceChangeNotifyMask) {
if (pScrPriv->resourcesChanged) {
RRDeliverResourceEvent(client, pWin);
}
}
if (pRREvent->mask & RRLeaseNotifyMask) {
if (pScrPriv->leasesChanged) {
RRDeliverLeaseEvent(client, pWin);
}
}
}
return WT_WALKCHILDREN;
}
void
RRSetChanged(ScreenPtr pScreen)
{
/* set changed bits on the master screen only */
ScreenPtr master;
rrScrPriv(pScreen);
rrScrPrivPtr mastersp;
if (pScreen->isGPU) {
master = pScreen->current_master;
if (!master)
return;
mastersp = rrGetScrPriv(master);
}
else {
master = pScreen;
mastersp = pScrPriv;
}
mastersp->changed = TRUE;
}
/*
* Something changed; send events and adjust pointer position
*/
void
RRTellChanged(ScreenPtr pScreen)
{
ScreenPtr master;
rrScrPriv(pScreen);
rrScrPrivPtr mastersp;
int i;
ScreenPtr iter;
rrScrPrivPtr pSlaveScrPriv;
if (pScreen->isGPU) {
master = pScreen->current_master;
if (!master)
return;
mastersp = rrGetScrPriv(master);
}
else {
master = pScreen;
mastersp = pScrPriv;
}
xorg_list_for_each_entry(iter, &master->slave_list, slave_head) {
pSlaveScrPriv = rrGetScrPriv(iter);
if (!iter->is_output_slave)
continue;
if (CompareTimeStamps(mastersp->lastSetTime,
pSlaveScrPriv->lastSetTime) == EARLIER) {
mastersp->lastSetTime = pSlaveScrPriv->lastSetTime;
}
}
if (mastersp->changed) {
UpdateCurrentTimeIf();
if (mastersp->configChanged) {
mastersp->lastConfigTime = currentTime;
mastersp->configChanged = FALSE;
}
pScrPriv->changed = FALSE;
mastersp->changed = FALSE;
WalkTree(master, TellChanged, (void *) master);
mastersp->resourcesChanged = FALSE;
for (i = 0; i < pScrPriv->numOutputs; i++)
pScrPriv->outputs[i]->changed = FALSE;
for (i = 0; i < pScrPriv->numCrtcs; i++)
pScrPriv->crtcs[i]->changed = FALSE;
xorg_list_for_each_entry(iter, &master->slave_list, slave_head) {
pSlaveScrPriv = rrGetScrPriv(iter);
pSlaveScrPriv->provider->changed = FALSE;
if (iter->is_output_slave) {
for (i = 0; i < pSlaveScrPriv->numOutputs; i++)
pSlaveScrPriv->outputs[i]->changed = FALSE;
for (i = 0; i < pSlaveScrPriv->numCrtcs; i++)
pSlaveScrPriv->crtcs[i]->changed = FALSE;
}
}
if (mastersp->layoutChanged) {
pScrPriv->layoutChanged = FALSE;
RRPointerScreenConfigured(master);
RRSendConfigNotify(master);
}
}
}
/*
* Return the first output which is connected to an active CRTC
* Used in emulating 1.0 behaviour
*/
RROutputPtr
RRFirstOutput(ScreenPtr pScreen)
{
rrScrPriv(pScreen);
RROutputPtr output;
int i, j;
if (!pScrPriv)
return NULL;
if (pScrPriv->primaryOutput && pScrPriv->primaryOutput->crtc)
return pScrPriv->primaryOutput;
for (i = 0; i < pScrPriv->numCrtcs; i++) {
RRCrtcPtr crtc = pScrPriv->crtcs[i];
for (j = 0; j < pScrPriv->numOutputs; j++) {
output = pScrPriv->outputs[j];
if (output->crtc == crtc)
return output;
}
}
return NULL;
}
CARD16
RRVerticalRefresh(xRRModeInfo * mode)
{
CARD32 refresh;
CARD32 dots = mode->hTotal * mode->vTotal;
if (!dots)
return 0;
refresh = (mode->dotClock + dots / 2) / dots;
if (refresh > 0xffff)
refresh = 0xffff;
return (CARD16) refresh;
}
static int
ProcRRDispatch(ClientPtr client)
{
REQUEST(xReq);
if (stuff->data >= RRNumberRequests || !ProcRandrVector[stuff->data])
return BadRequest;
UpdateCurrentTimeIf();
return (*ProcRandrVector[stuff->data]) (client);
}
static int _X_COLD
SProcRRDispatch(ClientPtr client)
{
REQUEST(xReq);
if (stuff->data >= RRNumberRequests || !SProcRandrVector[stuff->data])
return BadRequest;
UpdateCurrentTimeIf();
return (*SProcRandrVector[stuff->data]) (client);
}
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