xserver-multidpi/randr/rroutput.c
Keith Packard e4e3447603 Add RandR leases with modesetting driver support [v6]
This adds support for RandR CRTC/Output leases through the modesetting
driver, creating a lease using new kernel infrastructure and returning
that to a client through an fd which will have access to only those
resources.

v2:	Restore CRTC mode when leases terminate

	When a lease terminates for a crtc we have saved data for, go
	ahead and restore the saved mode.

v3:	Report RR_Rotate_0 rotations for leased crtcs.

	Ignore leased CRTCs when selecting screen size.

	Stop leasing encoders, the kernel doesn't do that anymore.

	Turn off crtc->enabled while leased so that modesetting
	ignores them.

	Check lease status before calling any driver mode functions

	When starting a lease, mark leased CRTCs as disabled and hide
	their cursors. Also, check to see if there are other
	non-leased CRTCs which are driving leased Outputs and mark
	them as disabled as well. Sometimes an application will lease
	an idle crtc instead of the one already associated with the
	leased output.

	When terminating a lease, reset any CRTCs which are driving
	outputs that are no longer leased so that they start working
	again.

	This required splitting the DIX level lease termination code
	into two pieces, one to remove the lease from the system
	(RRLeaseTerminated) and a new function that frees the lease
	data structure (RRLeaseFree).

v4:	Report RR_Rotate_0 rotation for leased crtcs.

v5: Terminate all leases on server reset.

	Leases hang around after the associated client exits so that
	the client doesn't need to occupy an X server client slot and
	consume a file descriptor once it has gotten the output
	resources necessary.

	Any leases still hanging around when the X server resets or
	shuts down need to be cleaned up by calling the kernel to
	terminate the lease and freeing any DIX structures.

	Note that we cannot simply use the existing
	drmmode_terminate_lease function on each lease as that wants
	to also reset the video mode, and during server shut down that

   modesetting: Validate leases on VT enter

	The kernel doesn't allow any master ioctls to run when another
	VT is active, including simple things like listing the active
	leases. To deal with that, we check the list of leases
	whenever the X server VT is activated.

   xfree86: hide disabled cursors when resetting after lease termination

	The lessee may well have played with cursors and left one
	active on our screen. Just tell the kernel to turn it off.

v6:	Add meson build infrastructure

[Also bumped libdrm requirement - ajax]

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
2018-02-27 12:39:50 -05:00

675 lines
18 KiB
C

/*
* Copyright © 2006 Keith Packard
* Copyright © 2008 Red Hat, Inc.
*
* 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.
*/
#include "randrstr.h"
#include <X11/Xatom.h>
RESTYPE RROutputType;
/*
* Notify the output of some change
*/
void
RROutputChanged(RROutputPtr output, Bool configChanged)
{
/* set changed bits on the master screen only */
ScreenPtr pScreen = output->pScreen;
rrScrPrivPtr mastersp;
output->changed = TRUE;
if (!pScreen)
return;
if (pScreen->isGPU) {
ScreenPtr master = pScreen->current_master;
if (!master)
return;
mastersp = rrGetScrPriv(master);
}
else {
mastersp = rrGetScrPriv(pScreen);
}
RRSetChanged(pScreen);
if (configChanged)
mastersp->configChanged = TRUE;
}
/*
* Create an output
*/
RROutputPtr
RROutputCreate(ScreenPtr pScreen,
const char *name, int nameLength, void *devPrivate)
{
RROutputPtr output;
RROutputPtr *outputs;
rrScrPrivPtr pScrPriv;
Atom nonDesktopAtom;
if (!RRInit())
return NULL;
pScrPriv = rrGetScrPriv(pScreen);
outputs = reallocarray(pScrPriv->outputs,
pScrPriv->numOutputs + 1, sizeof(RROutputPtr));
if (!outputs)
return NULL;
pScrPriv->outputs = outputs;
output = malloc(sizeof(RROutputRec) + nameLength + 1);
if (!output)
return NULL;
output->id = FakeClientID(0);
output->pScreen = pScreen;
output->name = (char *) (output + 1);
output->nameLength = nameLength;
memcpy(output->name, name, nameLength);
output->name[nameLength] = '\0';
output->connection = RR_UnknownConnection;
output->subpixelOrder = SubPixelUnknown;
output->mmWidth = 0;
output->mmHeight = 0;
output->crtc = NULL;
output->numCrtcs = 0;
output->crtcs = NULL;
output->numClones = 0;
output->clones = NULL;
output->numModes = 0;
output->numPreferred = 0;
output->modes = NULL;
output->numUserModes = 0;
output->userModes = NULL;
output->properties = NULL;
output->pendingProperties = FALSE;
output->changed = FALSE;
output->devPrivate = devPrivate;
if (!AddResource(output->id, RROutputType, (void *) output))
return NULL;
pScrPriv->outputs[pScrPriv->numOutputs++] = output;
nonDesktopAtom = MakeAtom(RR_PROPERTY_NON_DESKTOP, strlen(RR_PROPERTY_NON_DESKTOP), TRUE);
if (nonDesktopAtom != BAD_RESOURCE) {
static const INT32 values[2] = { 0, 1 };
(void) RRConfigureOutputProperty(output, nonDesktopAtom, FALSE, FALSE, FALSE,
2, values);
}
RROutputSetNonDesktop(output, FALSE);
RRResourcesChanged(pScreen);
return output;
}
/*
* Notify extension that output parameters have been changed
*/
Bool
RROutputSetClones(RROutputPtr output, RROutputPtr * clones, int numClones)
{
RROutputPtr *newClones;
int i;
if (numClones == output->numClones) {
for (i = 0; i < numClones; i++)
if (output->clones[i] != clones[i])
break;
if (i == numClones)
return TRUE;
}
if (numClones) {
newClones = xallocarray(numClones, sizeof(RROutputPtr));
if (!newClones)
return FALSE;
}
else
newClones = NULL;
free(output->clones);
memcpy(newClones, clones, numClones * sizeof(RROutputPtr));
output->clones = newClones;
output->numClones = numClones;
RROutputChanged(output, TRUE);
return TRUE;
}
Bool
RROutputSetModes(RROutputPtr output,
RRModePtr * modes, int numModes, int numPreferred)
{
RRModePtr *newModes;
int i;
if (numModes == output->numModes && numPreferred == output->numPreferred) {
for (i = 0; i < numModes; i++)
if (output->modes[i] != modes[i])
break;
if (i == numModes) {
for (i = 0; i < numModes; i++)
RRModeDestroy(modes[i]);
return TRUE;
}
}
if (numModes) {
newModes = xallocarray(numModes, sizeof(RRModePtr));
if (!newModes)
return FALSE;
}
else
newModes = NULL;
if (output->modes) {
for (i = 0; i < output->numModes; i++)
RRModeDestroy(output->modes[i]);
free(output->modes);
}
memcpy(newModes, modes, numModes * sizeof(RRModePtr));
output->modes = newModes;
output->numModes = numModes;
output->numPreferred = numPreferred;
RROutputChanged(output, TRUE);
return TRUE;
}
int
RROutputAddUserMode(RROutputPtr output, RRModePtr mode)
{
int m;
ScreenPtr pScreen = output->pScreen;
rrScrPriv(pScreen);
RRModePtr *newModes;
/* Check to see if this mode is already listed for this output */
for (m = 0; m < output->numModes + output->numUserModes; m++) {
RRModePtr e = (m < output->numModes ?
output->modes[m] :
output->userModes[m - output->numModes]);
if (mode == e)
return Success;
}
/* Check with the DDX to see if this mode is OK */
if (pScrPriv->rrOutputValidateMode)
if (!pScrPriv->rrOutputValidateMode(pScreen, output, mode))
return BadMatch;
if (output->userModes)
newModes = reallocarray(output->userModes,
output->numUserModes + 1, sizeof(RRModePtr));
else
newModes = malloc(sizeof(RRModePtr));
if (!newModes)
return BadAlloc;
output->userModes = newModes;
output->userModes[output->numUserModes++] = mode;
++mode->refcnt;
RROutputChanged(output, TRUE);
RRTellChanged(pScreen);
return Success;
}
int
RROutputDeleteUserMode(RROutputPtr output, RRModePtr mode)
{
int m;
/* Find this mode in the user mode list */
for (m = 0; m < output->numUserModes; m++) {
RRModePtr e = output->userModes[m];
if (mode == e)
break;
}
/* Not there, access error */
if (m == output->numUserModes)
return BadAccess;
/* make sure the mode isn't active for this output */
if (output->crtc && output->crtc->mode == mode)
return BadMatch;
memmove(output->userModes + m, output->userModes + m + 1,
(output->numUserModes - m - 1) * sizeof(RRModePtr));
output->numUserModes--;
RRModeDestroy(mode);
return Success;
}
Bool
RROutputSetCrtcs(RROutputPtr output, RRCrtcPtr * crtcs, int numCrtcs)
{
RRCrtcPtr *newCrtcs;
int i;
if (numCrtcs == output->numCrtcs) {
for (i = 0; i < numCrtcs; i++)
if (output->crtcs[i] != crtcs[i])
break;
if (i == numCrtcs)
return TRUE;
}
if (numCrtcs) {
newCrtcs = xallocarray(numCrtcs, sizeof(RRCrtcPtr));
if (!newCrtcs)
return FALSE;
}
else
newCrtcs = NULL;
free(output->crtcs);
memcpy(newCrtcs, crtcs, numCrtcs * sizeof(RRCrtcPtr));
output->crtcs = newCrtcs;
output->numCrtcs = numCrtcs;
RROutputChanged(output, TRUE);
return TRUE;
}
Bool
RROutputSetConnection(RROutputPtr output, CARD8 connection)
{
if (output->connection == connection)
return TRUE;
output->connection = connection;
RROutputChanged(output, TRUE);
return TRUE;
}
Bool
RROutputSetSubpixelOrder(RROutputPtr output, int subpixelOrder)
{
if (output->subpixelOrder == subpixelOrder)
return TRUE;
output->subpixelOrder = subpixelOrder;
RROutputChanged(output, FALSE);
return TRUE;
}
Bool
RROutputSetPhysicalSize(RROutputPtr output, int mmWidth, int mmHeight)
{
if (output->mmWidth == mmWidth && output->mmHeight == mmHeight)
return TRUE;
output->mmWidth = mmWidth;
output->mmHeight = mmHeight;
RROutputChanged(output, FALSE);
return TRUE;
}
Bool
RROutputSetNonDesktop(RROutputPtr output, Bool nonDesktop)
{
const char *nonDesktopStr = RR_PROPERTY_NON_DESKTOP;
Atom nonDesktopProp = MakeAtom(nonDesktopStr, strlen(nonDesktopStr), TRUE);
uint32_t value = nonDesktop ? 1 : 0;
if (nonDesktopProp == None || nonDesktopProp == BAD_RESOURCE)
return FALSE;
return RRChangeOutputProperty(output, nonDesktopProp, XA_INTEGER, 32,
PropModeReplace, 1, &value, TRUE, FALSE) == Success;
}
void
RRDeliverOutputEvent(ClientPtr client, WindowPtr pWin, RROutputPtr output)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
rrScrPriv(pScreen);
RRCrtcPtr crtc = output->crtc;
RRModePtr mode = crtc ? crtc->mode : NULL;
xRROutputChangeNotifyEvent oe = {
.type = RRNotify + RREventBase,
.subCode = RRNotify_OutputChange,
.timestamp = pScrPriv->lastSetTime.milliseconds,
.configTimestamp = pScrPriv->lastConfigTime.milliseconds,
.window = pWin->drawable.id,
.output = output->id,
.crtc = crtc ? crtc->id : None,
.mode = mode ? mode->mode.id : None,
.rotation = crtc ? crtc->rotation : RR_Rotate_0,
.connection = output->nonDesktop ? RR_Disconnected : output->connection,
.subpixelOrder = output->subpixelOrder
};
WriteEventsToClient(client, 1, (xEvent *) &oe);
}
/*
* Destroy a Output at shutdown
*/
void
RROutputDestroy(RROutputPtr output)
{
FreeResource(output->id, 0);
}
static int
RROutputDestroyResource(void *value, XID pid)
{
RROutputPtr output = (RROutputPtr) value;
ScreenPtr pScreen = output->pScreen;
int m;
if (pScreen) {
rrScrPriv(pScreen);
int i;
if (pScrPriv->primaryOutput == output)
pScrPriv->primaryOutput = NULL;
for (i = 0; i < pScrPriv->numOutputs; i++) {
if (pScrPriv->outputs[i] == output) {
memmove(pScrPriv->outputs + i, pScrPriv->outputs + i + 1,
(pScrPriv->numOutputs - (i + 1)) * sizeof(RROutputPtr));
--pScrPriv->numOutputs;
break;
}
}
RRResourcesChanged(pScreen);
}
if (output->modes) {
for (m = 0; m < output->numModes; m++)
RRModeDestroy(output->modes[m]);
free(output->modes);
}
for (m = 0; m < output->numUserModes; m++)
RRModeDestroy(output->userModes[m]);
free(output->userModes);
free(output->crtcs);
free(output->clones);
RRDeleteAllOutputProperties(output);
free(output);
return 1;
}
/*
* Initialize output type
*/
Bool
RROutputInit(void)
{
RROutputType = CreateNewResourceType(RROutputDestroyResource, "OUTPUT");
if (!RROutputType)
return FALSE;
return TRUE;
}
/*
* Initialize output type error value
*/
void
RROutputInitErrorValue(void)
{
SetResourceTypeErrorValue(RROutputType, RRErrorBase + BadRROutput);
}
#define OutputInfoExtra (SIZEOF(xRRGetOutputInfoReply) - 32)
int
ProcRRGetOutputInfo(ClientPtr client)
{
REQUEST(xRRGetOutputInfoReq);
xRRGetOutputInfoReply rep;
RROutputPtr output;
CARD8 *extra;
unsigned long extraLen;
ScreenPtr pScreen;
rrScrPrivPtr pScrPriv;
RRCrtc *crtcs;
RRMode *modes;
RROutput *clones;
char *name;
int i;
Bool leased;
REQUEST_SIZE_MATCH(xRRGetOutputInfoReq);
VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
leased = RROutputIsLeased(output);
pScreen = output->pScreen;
pScrPriv = rrGetScrPriv(pScreen);
if (leased) {
rep = (xRRGetOutputInfoReply) {
.type = X_Reply,
.status = RRSetConfigSuccess,
.sequenceNumber = client->sequence,
.length = bytes_to_int32(OutputInfoExtra),
.timestamp = pScrPriv->lastSetTime.milliseconds,
.crtc = None,
.mmWidth = 0,
.mmHeight = 0,
.connection = RR_Disconnected,
.subpixelOrder = SubPixelUnknown,
.nCrtcs = 0,
.nModes = 0,
.nPreferred = 0,
.nClones = 0,
.nameLength = output->nameLength
};
extraLen = bytes_to_int32(rep.nameLength) << 2;
if (extraLen) {
rep.length += bytes_to_int32(extraLen);
extra = calloc(1, extraLen);
if (!extra)
return BadAlloc;
}
else
extra = NULL;
name = (char *) extra;
} else {
rep = (xRRGetOutputInfoReply) {
.type = X_Reply,
.status = RRSetConfigSuccess,
.sequenceNumber = client->sequence,
.length = bytes_to_int32(OutputInfoExtra),
.timestamp = pScrPriv->lastSetTime.milliseconds,
.crtc = output->crtc ? output->crtc->id : None,
.mmWidth = output->mmWidth,
.mmHeight = output->mmHeight,
.connection = output->nonDesktop ? RR_Disconnected : output->connection,
.subpixelOrder = output->subpixelOrder,
.nCrtcs = output->numCrtcs,
.nModes = output->numModes + output->numUserModes,
.nPreferred = output->numPreferred,
.nClones = output->numClones,
.nameLength = output->nameLength
};
extraLen = ((output->numCrtcs +
output->numModes + output->numUserModes +
output->numClones + bytes_to_int32(rep.nameLength)) << 2);
if (extraLen) {
rep.length += bytes_to_int32(extraLen);
extra = calloc(1, extraLen);
if (!extra)
return BadAlloc;
}
else
extra = NULL;
crtcs = (RRCrtc *) extra;
modes = (RRMode *) (crtcs + output->numCrtcs);
clones = (RROutput *) (modes + output->numModes + output->numUserModes);
name = (char *) (clones + output->numClones);
for (i = 0; i < output->numCrtcs; i++) {
crtcs[i] = output->crtcs[i]->id;
if (client->swapped)
swapl(&crtcs[i]);
}
for (i = 0; i < output->numModes + output->numUserModes; i++) {
if (i < output->numModes)
modes[i] = output->modes[i]->mode.id;
else
modes[i] = output->userModes[i - output->numModes]->mode.id;
if (client->swapped)
swapl(&modes[i]);
}
for (i = 0; i < output->numClones; i++) {
clones[i] = output->clones[i]->id;
if (client->swapped)
swapl(&clones[i]);
}
}
memcpy(name, output->name, output->nameLength);
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
swapl(&rep.timestamp);
swapl(&rep.crtc);
swapl(&rep.mmWidth);
swapl(&rep.mmHeight);
swaps(&rep.nCrtcs);
swaps(&rep.nModes);
swaps(&rep.nPreferred);
swaps(&rep.nClones);
swaps(&rep.nameLength);
}
WriteToClient(client, sizeof(xRRGetOutputInfoReply), &rep);
if (extraLen) {
WriteToClient(client, extraLen, extra);
free(extra);
}
return Success;
}
static void
RRSetPrimaryOutput(ScreenPtr pScreen, rrScrPrivPtr pScrPriv, RROutputPtr output)
{
if (pScrPriv->primaryOutput == output)
return;
/* clear the old primary */
if (pScrPriv->primaryOutput) {
RROutputChanged(pScrPriv->primaryOutput, 0);
pScrPriv->primaryOutput = NULL;
}
/* set the new primary */
if (output) {
pScrPriv->primaryOutput = output;
RROutputChanged(output, 0);
}
pScrPriv->layoutChanged = TRUE;
RRTellChanged(pScreen);
}
int
ProcRRSetOutputPrimary(ClientPtr client)
{
REQUEST(xRRSetOutputPrimaryReq);
RROutputPtr output = NULL;
WindowPtr pWin;
rrScrPrivPtr pScrPriv;
int ret;
ScreenPtr slave;
REQUEST_SIZE_MATCH(xRRSetOutputPrimaryReq);
ret = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
if (ret != Success)
return ret;
if (stuff->output) {
VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
if (RROutputIsLeased(output))
return BadAccess;
if (!output->pScreen->isGPU && output->pScreen != pWin->drawable.pScreen) {
client->errorValue = stuff->window;
return BadMatch;
}
if (output->pScreen->isGPU && output->pScreen->current_master != pWin->drawable.pScreen) {
client->errorValue = stuff->window;
return BadMatch;
}
}
pScrPriv = rrGetScrPriv(pWin->drawable.pScreen);
if (pScrPriv)
{
RRSetPrimaryOutput(pWin->drawable.pScreen, pScrPriv, output);
xorg_list_for_each_entry(slave,
&pWin->drawable.pScreen->slave_list,
slave_head) {
if (slave->is_output_slave)
RRSetPrimaryOutput(slave, rrGetScrPriv(slave), output);
}
}
return Success;
}
int
ProcRRGetOutputPrimary(ClientPtr client)
{
REQUEST(xRRGetOutputPrimaryReq);
WindowPtr pWin;
rrScrPrivPtr pScrPriv;
xRRGetOutputPrimaryReply rep;
RROutputPtr primary = NULL;
int rc;
REQUEST_SIZE_MATCH(xRRGetOutputPrimaryReq);
rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
if (rc != Success)
return rc;
pScrPriv = rrGetScrPriv(pWin->drawable.pScreen);
if (pScrPriv)
primary = pScrPriv->primaryOutput;
rep = (xRRGetOutputPrimaryReply) {
.type = X_Reply,
.sequenceNumber = client->sequence,
.output = primary ? primary->id : None
};
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.output);
}
WriteToClient(client, sizeof(xRRGetOutputPrimaryReply), &rep);
return Success;
}