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xserver/hw/xfree86/drivers/modesetting/dri2.c

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/*
* Copyright © 2013 Intel Corporation
* Copyright © 2014 Broadcom
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/**
* @file dri2.c
*
* Implements generic support for DRI2 on KMS, using glamor pixmaps
* for color buffer management (no support for other aux buffers), and
* the DRM vblank ioctls.
*
* This doesn't implement pageflipping yet.
*/
#include "dix-config.h"
#include <errno.h>
#include <time.h>
#include "dix/dix_priv.h"
#include "list.h"
#include "xf86.h"
#include "driver.h"
#include "dri2.h"
#ifdef GLAMOR_HAS_GBM
enum ms_dri2_frame_event_type {
MS_DRI2_QUEUE_SWAP,
MS_DRI2_QUEUE_FLIP,
MS_DRI2_WAIT_MSC,
};
typedef struct ms_dri2_frame_event {
ScreenPtr screen;
DrawablePtr drawable;
ClientPtr client;
enum ms_dri2_frame_event_type type;
int frame;
xf86CrtcPtr crtc;
struct xorg_list drawable_resource, client_resource;
/* for swaps & flips only */
DRI2SwapEventPtr event_complete;
void *event_data;
DRI2BufferPtr front;
DRI2BufferPtr back;
} ms_dri2_frame_event_rec, *ms_dri2_frame_event_ptr;
typedef struct {
int refcnt;
PixmapPtr pixmap;
} ms_dri2_buffer_private_rec, *ms_dri2_buffer_private_ptr;
static DevPrivateKeyRec ms_dri2_client_key;
static RESTYPE frame_event_client_type, frame_event_drawable_type;
static int ms_dri2_server_generation;
struct ms_dri2_resource {
XID id;
RESTYPE type;
struct xorg_list list;
};
static struct ms_dri2_resource *
ms_get_resource(XID id, RESTYPE type)
{
void *ptr;
ptr = NULL;
dixLookupResourceByType(&ptr, id, type, NULL, DixWriteAccess);
if (ptr)
return ptr;
struct ms_dri2_resource *resource = calloc(1, sizeof(*resource));
if (resource == NULL)
return NULL;
if (!AddResource(id, type, resource))
return NULL;
resource->id = id;
resource->type = type;
xorg_list_init(&resource->list);
return resource;
}
static inline PixmapPtr
get_drawable_pixmap(DrawablePtr drawable)
{
ScreenPtr screen = drawable->pScreen;
if (drawable->type == DRAWABLE_PIXMAP)
return (PixmapPtr) drawable;
else
return screen->GetWindowPixmap((WindowPtr) drawable);
}
static DRI2Buffer2Ptr
ms_dri2_create_buffer2(ScreenPtr screen, DrawablePtr drawable,
unsigned int attachment, unsigned int format)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
DRI2Buffer2Ptr buffer;
PixmapPtr pixmap;
CARD32 size;
CARD16 pitch;
ms_dri2_buffer_private_ptr private;
buffer = calloc(1, sizeof *buffer);
if (buffer == NULL)
return NULL;
private = calloc(1, sizeof(*private));
if (private == NULL) {
free(buffer);
return NULL;
}
pixmap = NULL;
if (attachment == DRI2BufferFrontLeft) {
pixmap = get_drawable_pixmap(drawable);
if (pixmap && pixmap->drawable.pScreen != screen)
pixmap = NULL;
if (pixmap)
pixmap->refcnt++;
}
if (pixmap == NULL) {
int pixmap_width = drawable->width;
int pixmap_height = drawable->height;
int pixmap_cpp = (format != 0) ? format : drawable->depth;
/* Assume that non-color-buffers require special
* device-specific handling. Mesa currently makes no requests
* for non-color aux buffers.
*/
switch (attachment) {
case DRI2BufferAccum:
case DRI2BufferBackLeft:
case DRI2BufferBackRight:
case DRI2BufferFakeFrontLeft:
case DRI2BufferFakeFrontRight:
case DRI2BufferFrontLeft:
case DRI2BufferFrontRight:
break;
case DRI2BufferStencil:
case DRI2BufferDepth:
case DRI2BufferDepthStencil:
case DRI2BufferHiz:
default:
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"Request for DRI2 buffer attachment %d unsupported\n",
attachment);
free(private);
free(buffer);
return NULL;
}
pixmap = screen->CreatePixmap(screen,
pixmap_width,
pixmap_height,
pixmap_cpp,
0);
if (pixmap == NULL) {
free(private);
free(buffer);
return NULL;
}
}
buffer->attachment = attachment;
buffer->cpp = pixmap->drawable.bitsPerPixel / 8;
buffer->format = format;
/* The buffer's flags field is unused by the client drivers in
* Mesa currently.
*/
buffer->flags = 0;
buffer->name = ms->glamor.name_from_pixmap(pixmap, &pitch, &size);
buffer->pitch = pitch;
if (buffer->name == -1) {
xf86DrvMsg(scrn->scrnIndex, X_ERROR,
"Failed to get DRI2 name for pixmap\n");
dixDestroyPixmap(pixmap, 0);
free(private);
free(buffer);
return NULL;
}
buffer->driverPrivate = private;
private->refcnt = 1;
private->pixmap = pixmap;
return buffer;
}
static DRI2Buffer2Ptr
ms_dri2_create_buffer(DrawablePtr drawable, unsigned int attachment,
unsigned int format)
{
return ms_dri2_create_buffer2(drawable->pScreen, drawable, attachment,
format);
}
static void
ms_dri2_reference_buffer(DRI2Buffer2Ptr buffer)
{
if (buffer) {
ms_dri2_buffer_private_ptr private = buffer->driverPrivate;
private->refcnt++;
}
}
static void ms_dri2_destroy_buffer2(ScreenPtr unused, DrawablePtr unused2,
DRI2Buffer2Ptr buffer)
{
if (!buffer)
return;
if (buffer->driverPrivate) {
ms_dri2_buffer_private_ptr private = buffer->driverPrivate;
if (--private->refcnt == 0) {
dixDestroyPixmap(private->pixmap, 0);
free(private);
free(buffer);
}
} else {
free(buffer);
}
}
static void ms_dri2_destroy_buffer(DrawablePtr drawable, DRI2Buffer2Ptr buffer)
{
ms_dri2_destroy_buffer2(NULL, drawable, buffer);
}
static void
ms_dri2_copy_region2(ScreenPtr screen, DrawablePtr drawable, RegionPtr pRegion,
DRI2BufferPtr destBuffer, DRI2BufferPtr sourceBuffer)
{
ms_dri2_buffer_private_ptr src_priv = sourceBuffer->driverPrivate;
ms_dri2_buffer_private_ptr dst_priv = destBuffer->driverPrivate;
PixmapPtr src_pixmap = src_priv->pixmap;
PixmapPtr dst_pixmap = dst_priv->pixmap;
DrawablePtr src = (sourceBuffer->attachment == DRI2BufferFrontLeft)
? drawable : &src_pixmap->drawable;
DrawablePtr dst = (destBuffer->attachment == DRI2BufferFrontLeft)
? drawable : &dst_pixmap->drawable;
int off_x = 0, off_y = 0;
Bool translate = FALSE;
RegionPtr pCopyClip;
GCPtr gc;
if (destBuffer->attachment == DRI2BufferFrontLeft &&
drawable->pScreen != screen) {
dst = DRI2UpdatePrime(drawable, destBuffer);
if (!dst)
return;
if (dst != drawable)
translate = TRUE;
}
if (translate && drawable->type == DRAWABLE_WINDOW) {
PixmapPtr pixmap = get_drawable_pixmap(drawable);
off_x = -pixmap->screen_x;
off_y = -pixmap->screen_y;
off_x += drawable->x;
off_y += drawable->y;
}
gc = GetScratchGC(dst->depth, screen);
if (!gc)
return;
pCopyClip = REGION_CREATE(screen, NULL, 0);
REGION_COPY(screen, pCopyClip, pRegion);
if (translate)
REGION_TRANSLATE(screen, pCopyClip, off_x, off_y);
(*gc->funcs->ChangeClip) (gc, CT_REGION, pCopyClip, 0);
ValidateGC(dst, gc);
/* It's important that this copy gets submitted before the direct
* rendering client submits rendering for the next frame, but we
* don't actually need to submit right now. The client will wait
* for the DRI2CopyRegion reply or the swap buffer event before
* rendering, and we'll hit the flush callback chain before those
* messages are sent. We submit our batch buffers from the flush
* callback chain so we know that will happen before the client
* tries to render again.
*/
(void) gc->ops->CopyArea(src, dst, gc,
0, 0,
drawable->width, drawable->height,
off_x, off_y);
FreeScratchGC(gc);
}
static void
ms_dri2_copy_region(DrawablePtr drawable, RegionPtr pRegion,
DRI2BufferPtr destBuffer, DRI2BufferPtr sourceBuffer)
{
ms_dri2_copy_region2(drawable->pScreen, drawable, pRegion, destBuffer,
sourceBuffer);
}
static uint64_t
gettime_us(void)
{
struct timespec tv;
if (clock_gettime(CLOCK_MONOTONIC, &tv))
return 0;
return (uint64_t)tv.tv_sec * 1000000 + tv.tv_nsec / 1000;
}
/**
* Get current frame count and frame count timestamp, based on drawable's
* crtc.
*/
static int
ms_dri2_get_msc(DrawablePtr draw, CARD64 *ust, CARD64 *msc)
{
int ret;
xf86CrtcPtr crtc = ms_dri2_crtc_covering_drawable(draw);
/* Drawable not displayed, make up a *monotonic* value */
if (crtc == NULL) {
*ust = gettime_us();
*msc = 0;
return TRUE;
}
ret = ms_get_crtc_ust_msc(crtc, ust, msc);
if (ret)
return FALSE;
return TRUE;
}
static XID
get_client_id(ClientPtr client)
{
XID *ptr = dixGetPrivateAddr(&client->devPrivates, &ms_dri2_client_key);
if (*ptr == 0)
*ptr = FakeClientID(client->index);
return *ptr;
}
/*
* Hook this frame event into the server resource
* database so we can clean it up if the drawable or
* client exits while the swap is pending
*/
static Bool
ms_dri2_add_frame_event(ms_dri2_frame_event_ptr info)
{
struct ms_dri2_resource *resource;
resource = ms_get_resource(get_client_id(info->client),
frame_event_client_type);
if (resource == NULL)
return FALSE;
xorg_list_add(&info->client_resource, &resource->list);
resource = ms_get_resource(info->drawable->id, frame_event_drawable_type);
if (resource == NULL) {
xorg_list_del(&info->client_resource);
return FALSE;
}
xorg_list_add(&info->drawable_resource, &resource->list);
return TRUE;
}
static void
ms_dri2_del_frame_event(ms_dri2_frame_event_rec *info)
{
xorg_list_del(&info->client_resource);
xorg_list_del(&info->drawable_resource);
if (info->front)
ms_dri2_destroy_buffer(NULL, info->front);
if (info->back)
ms_dri2_destroy_buffer(NULL, info->back);
free(info);
}
static void
ms_dri2_blit_swap(DrawablePtr drawable,
DRI2BufferPtr dst,
DRI2BufferPtr src)
{
BoxRec box;
RegionRec region;
box.x1 = 0;
box.y1 = 0;
box.x2 = drawable->width;
box.y2 = drawable->height;
REGION_INIT(pScreen, &region, &box, 0);
ms_dri2_copy_region(drawable, &region, dst, src);
}
struct ms_dri2_vblank_event {
XID drawable_id;
ClientPtr client;
DRI2SwapEventPtr event_complete;
void *event_data;
};
static void
ms_dri2_flip_abort(modesettingPtr ms, void *data)
{
struct ms_present_vblank_event *event = data;
ms->drmmode.dri2_flipping = FALSE;
free(event);
}
static void
ms_dri2_flip_handler(modesettingPtr ms, uint64_t msc,
uint64_t ust, void *data)
{
struct ms_dri2_vblank_event *event = data;
uint32_t frame = msc;
uint32_t tv_sec = ust / 1000000;
uint32_t tv_usec = ust % 1000000;
DrawablePtr drawable;
int status;
status = dixLookupDrawable(&drawable, event->drawable_id, serverClient,
M_ANY, DixWriteAccess);
if (status == Success)
DRI2SwapComplete(event->client, drawable, frame, tv_sec, tv_usec,
DRI2_FLIP_COMPLETE, event->event_complete,
event->event_data);
ms->drmmode.dri2_flipping = FALSE;
free(event);
}
static Bool
ms_dri2_schedule_flip(ms_dri2_frame_event_ptr info)
{
DrawablePtr draw = info->drawable;
ScreenPtr screen = draw->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
ms_dri2_buffer_private_ptr back_priv = info->back->driverPrivate;
struct ms_dri2_vblank_event *event;
event = calloc(1, sizeof(struct ms_dri2_vblank_event));
if (!event)
return FALSE;
event->drawable_id = draw->id;
event->client = info->client;
event->event_complete = info->event_complete;
event->event_data = info->event_data;
if (ms_do_pageflip(screen, back_priv->pixmap, event,
info->crtc, FALSE,
ms_dri2_flip_handler,
ms_dri2_flip_abort,
"DRI2-flip")) {
ms->drmmode.dri2_flipping = TRUE;
return TRUE;
}
return FALSE;
}
static Bool
update_front(DrawablePtr draw, DRI2BufferPtr front)
{
ScreenPtr screen = draw->pScreen;
PixmapPtr pixmap = get_drawable_pixmap(draw);
ms_dri2_buffer_private_ptr priv = front->driverPrivate;
modesettingPtr ms = modesettingPTR(xf86ScreenToScrn(screen));
CARD32 size;
CARD16 pitch;
int name;
name = ms->glamor.name_from_pixmap(pixmap, &pitch, &size);
if (name < 0)
return FALSE;
front->name = name;
dixDestroyPixmap(priv->pixmap, 0);
front->pitch = pixmap->devKind;
front->cpp = pixmap->drawable.bitsPerPixel / 8;
priv->pixmap = pixmap;
pixmap->refcnt++;
return TRUE;
}
static Bool
can_exchange(ScrnInfoPtr scrn, DrawablePtr draw,
DRI2BufferPtr front, DRI2BufferPtr back)
{
ms_dri2_buffer_private_ptr front_priv = front->driverPrivate;
ms_dri2_buffer_private_ptr back_priv = back->driverPrivate;
PixmapPtr front_pixmap;
PixmapPtr back_pixmap = back_priv->pixmap;
xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(scrn);
int num_crtcs_on = 0;
int i;
for (i = 0; i < config->num_crtc; i++) {
drmmode_crtc_private_ptr drmmode_crtc = config->crtc[i]->driver_private;
/* Don't do pageflipping if CRTCs are rotated. */
if (drmmode_crtc->rotate_bo.gbm)
return FALSE;
if (xf86_crtc_on(config->crtc[i]))
num_crtcs_on++;
}
/* We can't do pageflipping if all the CRTCs are off. */
if (num_crtcs_on == 0)
return FALSE;
if (!update_front(draw, front))
return FALSE;
front_pixmap = front_priv->pixmap;
if (front_pixmap->drawable.width != back_pixmap->drawable.width)
return FALSE;
if (front_pixmap->drawable.height != back_pixmap->drawable.height)
return FALSE;
if (front_pixmap->drawable.bitsPerPixel !=
back_pixmap->drawable.bitsPerPixel)
return FALSE;
if (front_pixmap->devKind != back_pixmap->devKind)
return FALSE;
return TRUE;
}
static Bool
can_flip(ScrnInfoPtr scrn, DrawablePtr draw,
DRI2BufferPtr front, DRI2BufferPtr back)
{
modesettingPtr ms = modesettingPTR(scrn);
return draw->type == DRAWABLE_WINDOW &&
ms->drmmode.pageflip &&
!ms->drmmode.sprites_visible &&
!ms->drmmode.present_flipping &&
scrn->vtSema &&
DRI2CanFlip(draw) && can_exchange(scrn, draw, front, back);
}
static void
ms_dri2_exchange_buffers(DrawablePtr draw, DRI2BufferPtr front,
DRI2BufferPtr back)
{
ms_dri2_buffer_private_ptr front_priv = front->driverPrivate;
ms_dri2_buffer_private_ptr back_priv = back->driverPrivate;
ScreenPtr screen = draw->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
msPixmapPrivPtr front_pix = msGetPixmapPriv(&ms->drmmode, front_priv->pixmap);
msPixmapPrivPtr back_pix = msGetPixmapPriv(&ms->drmmode, back_priv->pixmap);
msPixmapPrivRec tmp_pix;
RegionRec region;
int tmp;
/* Swap BO names so DRI works */
tmp = front->name;
front->name = back->name;
back->name = tmp;
/* Swap pixmap privates */
tmp_pix = *front_pix;
*front_pix = *back_pix;
*back_pix = tmp_pix;
ms->glamor.egl_exchange_buffers(front_priv->pixmap, back_priv->pixmap);
/* Post damage on the front buffer so that listeners, such
* as DisplayLink know take a copy and shove it over the USB.
*/
region.extents.x1 = region.extents.y1 = 0;
region.extents.x2 = front_priv->pixmap->drawable.width;
region.extents.y2 = front_priv->pixmap->drawable.height;
region.data = NULL;
DamageRegionAppend(&front_priv->pixmap->drawable, &region);
DamageRegionProcessPending(&front_priv->pixmap->drawable);
}
static void
ms_dri2_frame_event_handler(uint64_t msc,
uint64_t usec,
void *data)
{
ms_dri2_frame_event_ptr frame_info = data;
DrawablePtr drawable = frame_info->drawable;
ScreenPtr screen = frame_info->screen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
uint32_t tv_sec = usec / 1000000;
uint32_t tv_usec = usec % 1000000;
if (!drawable) {
ms_dri2_del_frame_event(frame_info);
return;
}
switch (frame_info->type) {
case MS_DRI2_QUEUE_FLIP:
if (can_flip(scrn, drawable, frame_info->front, frame_info->back) &&
ms_dri2_schedule_flip(frame_info)) {
ms_dri2_exchange_buffers(drawable, frame_info->front, frame_info->back);
break;
}
/* else fall through to blit */
case MS_DRI2_QUEUE_SWAP:
ms_dri2_blit_swap(drawable, frame_info->front, frame_info->back);
DRI2SwapComplete(frame_info->client, drawable, msc, tv_sec, tv_usec,
DRI2_BLIT_COMPLETE,
frame_info->client ? frame_info->event_complete : NULL,
frame_info->event_data);
break;
case MS_DRI2_WAIT_MSC:
if (frame_info->client)
DRI2WaitMSCComplete(frame_info->client, drawable,
msc, tv_sec, tv_usec);
break;
default:
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"%s: unknown vblank event (type %d) received\n", __func__,
frame_info->type);
break;
}
ms_dri2_del_frame_event(frame_info);
}
static void
ms_dri2_frame_event_abort(void *data)
{
ms_dri2_frame_event_ptr frame_info = data;
ms_dri2_del_frame_event(frame_info);
}
/**
* Request a DRM event when the requested conditions will be satisfied.
*
* We need to handle the event and ask the server to wake up the client when
* we receive it.
*/
static int
ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
CARD64 divisor, CARD64 remainder)
{
ScreenPtr screen = draw->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
ms_dri2_frame_event_ptr wait_info;
int ret;
xf86CrtcPtr crtc = ms_dri2_crtc_covering_drawable(draw);
CARD64 current_msc, current_ust, request_msc;
uint32_t seq;
uint64_t queued_msc;
/* Drawable not visible, return immediately */
if (!crtc)
goto out_complete;
wait_info = calloc(1, sizeof(*wait_info));
if (!wait_info)
goto out_complete;
wait_info->screen = screen;
wait_info->drawable = draw;
wait_info->client = client;
wait_info->type = MS_DRI2_WAIT_MSC;
if (!ms_dri2_add_frame_event(wait_info)) {
free(wait_info);
wait_info = NULL;
goto out_complete;
}
/* Get current count */
ret = ms_get_crtc_ust_msc(crtc, &current_ust, &current_msc);
/*
* If divisor is zero, or current_msc is smaller than target_msc,
* we just need to make sure target_msc passes before waking up the
* client.
*/
if (divisor == 0 || current_msc < target_msc) {
/* If target_msc already reached or passed, set it to
* current_msc to ensure we return a reasonable value back
* to the caller. This keeps the client from continually
* sending us MSC targets from the past by forcibly updating
* their count on this call.
*/
seq = ms_drm_queue_alloc(crtc, wait_info,
ms_dri2_frame_event_handler,
ms_dri2_frame_event_abort);
if (!seq)
goto out_free;
if (current_msc >= target_msc)
target_msc = current_msc;
ret = ms_queue_vblank(crtc, MS_QUEUE_ABSOLUTE, target_msc, &queued_msc, seq);
if (!ret) {
static int limit = 5;
if (limit) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"%s:%d get vblank counter failed: %s\n",
__FUNCTION__, __LINE__,
strerror(errno));
limit--;
}
goto out_free;
}
wait_info->frame = queued_msc;
DRI2BlockClient(client, draw);
return TRUE;
}
/*
* If we get here, target_msc has already passed or we don't have one,
* so we queue an event that will satisfy the divisor/remainder equation.
*/
request_msc = current_msc - (current_msc % divisor) +
remainder;
/*
* If calculated remainder is larger than requested remainder,
* it means we've passed the last point where
* seq % divisor == remainder, so we need to wait for the next time
* that will happen.
*/
if ((current_msc % divisor) >= remainder)
request_msc += divisor;
seq = ms_drm_queue_alloc(crtc, wait_info,
ms_dri2_frame_event_handler,
ms_dri2_frame_event_abort);
if (!seq)
goto out_free;
if (!ms_queue_vblank(crtc, MS_QUEUE_ABSOLUTE, request_msc, &queued_msc, seq)) {
static int limit = 5;
if (limit) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"%s:%d get vblank counter failed: %s\n",
__FUNCTION__, __LINE__,
strerror(errno));
limit--;
}
goto out_free;
}
wait_info->frame = queued_msc;
DRI2BlockClient(client, draw);
return TRUE;
out_free:
ms_dri2_del_frame_event(wait_info);
out_complete:
DRI2WaitMSCComplete(client, draw, target_msc, 0, 0);
return TRUE;
}
/**
* ScheduleSwap is responsible for requesting a DRM vblank event for
* the appropriate frame, or executing the swap immediately if it
* doesn't need to wait.
*
* When the swap is complete, the driver should call into the server so it
* can send any swap complete events that have been requested.
*/
static int
ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
DRI2BufferPtr front, DRI2BufferPtr back,
CARD64 *target_msc, CARD64 divisor,
CARD64 remainder, DRI2SwapEventPtr func, void *data)
{
ScreenPtr screen = draw->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
int ret, flip = 0;
xf86CrtcPtr crtc = ms_dri2_crtc_covering_drawable(draw);
ms_dri2_frame_event_ptr frame_info = NULL;
uint64_t current_msc, current_ust;
uint64_t request_msc;
uint32_t seq;
ms_queue_flag ms_flag = MS_QUEUE_ABSOLUTE;
uint64_t queued_msc;
/* Drawable not displayed... just complete the swap */
if (!crtc)
goto blit_fallback;
frame_info = calloc(1, sizeof(*frame_info));
if (!frame_info)
goto blit_fallback;
frame_info->screen = screen;
frame_info->drawable = draw;
frame_info->client = client;
frame_info->event_complete = func;
frame_info->event_data = data;
frame_info->front = front;
frame_info->back = back;
frame_info->crtc = crtc;
frame_info->type = MS_DRI2_QUEUE_SWAP;
if (!ms_dri2_add_frame_event(frame_info)) {
free(frame_info);
frame_info = NULL;
goto blit_fallback;
}
ms_dri2_reference_buffer(front);
ms_dri2_reference_buffer(back);
ret = ms_get_crtc_ust_msc(crtc, &current_ust, &current_msc);
if (ret != Success)
goto blit_fallback;
/* Flips need to be submitted one frame before */
if (can_flip(scrn, draw, front, back)) {
frame_info->type = MS_DRI2_QUEUE_FLIP;
flip = 1;
}
/* Correct target_msc by 'flip' if frame_info->type == MS_DRI2_QUEUE_FLIP.
* Do it early, so handling of different timing constraints
* for divisor, remainder and msc vs. target_msc works.
*/
if (*target_msc > 0)
*target_msc -= flip;
/* If non-pageflipping, but blitting/exchanging, we need to use
* DRM_VBLANK_NEXTONMISS to avoid unreliable timestamping later
* on.
*/
if (flip == 0)
ms_flag |= MS_QUEUE_NEXT_ON_MISS;
/*
* If divisor is zero, or current_msc is smaller than target_msc
* we just need to make sure target_msc passes before initiating
* the swap.
*/
if (divisor == 0 || current_msc < *target_msc) {
/* If target_msc already reached or passed, set it to
* current_msc to ensure we return a reasonable value back
* to the caller. This makes swap_interval logic more robust.
*/
if (current_msc >= *target_msc)
*target_msc = current_msc;
seq = ms_drm_queue_alloc(crtc, frame_info,
ms_dri2_frame_event_handler,
ms_dri2_frame_event_abort);
if (!seq)
goto blit_fallback;
if (!ms_queue_vblank(crtc, ms_flag, *target_msc, &queued_msc, seq)) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"divisor 0 get vblank counter failed: %s\n",
strerror(errno));
goto blit_fallback;
}
*target_msc = queued_msc + flip;
frame_info->frame = *target_msc;
return TRUE;
}
/*
* If we get here, target_msc has already passed or we don't have one,
* and we need to queue an event that will satisfy the divisor/remainder
* equation.
*/
request_msc = current_msc - (current_msc % divisor) +
remainder;
/*
* If the calculated deadline vbl.request.sequence is smaller than
* or equal to current_msc, it means we've passed the last point
* when effective onset frame seq could satisfy
* seq % divisor == remainder, so we need to wait for the next time
* this will happen.
* This comparison takes the DRM_VBLANK_NEXTONMISS delay into account.
*/
if (request_msc <= current_msc)
request_msc += divisor;
seq = ms_drm_queue_alloc(crtc, frame_info,
ms_dri2_frame_event_handler,
ms_dri2_frame_event_abort);
if (!seq)
goto blit_fallback;
/* Account for 1 frame extra pageflip delay if flip > 0 */
if (!ms_queue_vblank(crtc, ms_flag, request_msc - flip, &queued_msc, seq)) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"final get vblank counter failed: %s\n",
strerror(errno));
goto blit_fallback;
}
/* Adjust returned value for 1 fame pageflip offset of flip > 0 */
*target_msc = queued_msc + flip;
frame_info->frame = *target_msc;
return TRUE;
blit_fallback:
ms_dri2_blit_swap(draw, front, back);
DRI2SwapComplete(client, draw, 0, 0, 0, DRI2_BLIT_COMPLETE, func, data);
if (frame_info)
ms_dri2_del_frame_event(frame_info);
*target_msc = 0; /* offscreen, so zero out target vblank count */
return TRUE;
}
static int
ms_dri2_frame_event_client_gone(void *data, XID id)
{
struct ms_dri2_resource *resource = data;
while (!xorg_list_is_empty(&resource->list)) {
ms_dri2_frame_event_ptr info =
xorg_list_first_entry(&resource->list,
ms_dri2_frame_event_rec,
client_resource);
xorg_list_del(&info->client_resource);
info->client = NULL;
}
free(resource);
return Success;
}
static int
ms_dri2_frame_event_drawable_gone(void *data, XID id)
{
struct ms_dri2_resource *resource = data;
while (!xorg_list_is_empty(&resource->list)) {
ms_dri2_frame_event_ptr info =
xorg_list_first_entry(&resource->list,
ms_dri2_frame_event_rec,
drawable_resource);
xorg_list_del(&info->drawable_resource);
info->drawable = NULL;
}
free(resource);
return Success;
}
static Bool
ms_dri2_register_frame_event_resource_types(void)
{
frame_event_client_type =
CreateNewResourceType(ms_dri2_frame_event_client_gone,
"Frame Event Client");
if (!frame_event_client_type)
return FALSE;
frame_event_drawable_type =
CreateNewResourceType(ms_dri2_frame_event_drawable_gone,
"Frame Event Drawable");
if (!frame_event_drawable_type)
return FALSE;
return TRUE;
}
Bool
ms_dri2_screen_init(ScreenPtr screen)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
DRI2InfoRec info;
const char *driver_names[2] = { NULL, NULL };
if (!ms->glamor.supports_pixmap_import_export(screen)) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"DRI2: glamor lacks support for pixmap import/export\n");
}
if (!xf86LoaderCheckSymbol("DRI2Version"))
return FALSE;
if (!dixRegisterPrivateKey(&ms_dri2_client_key,
PRIVATE_CLIENT, sizeof(XID)))
return FALSE;
if (serverGeneration != ms_dri2_server_generation) {
ms_dri2_server_generation = serverGeneration;
if (!ms_dri2_register_frame_event_resource_types()) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"Cannot register DRI2 frame event resources\n");
return FALSE;
}
}
memset(&info, '\0', sizeof(info));
info.fd = ms->fd;
info.driverName = NULL; /* Compat field, unused. */
info.deviceName = drmGetDeviceNameFromFd(ms->fd);
info.version = 9;
info.CreateBuffer = ms_dri2_create_buffer;
info.DestroyBuffer = ms_dri2_destroy_buffer;
info.CopyRegion = ms_dri2_copy_region;
info.ScheduleSwap = ms_dri2_schedule_swap;
info.GetMSC = ms_dri2_get_msc;
info.ScheduleWaitMSC = ms_dri2_schedule_wait_msc;
info.CreateBuffer2 = ms_dri2_create_buffer2;
info.DestroyBuffer2 = ms_dri2_destroy_buffer2;
info.CopyRegion2 = ms_dri2_copy_region2;
/* Ask Glamor to obtain the DRI driver name via EGL_MESA_query_driver, */
if (ms->glamor.egl_get_driver_name)
driver_names[0] = ms->glamor.egl_get_driver_name(screen);
if (driver_names[0]) {
/* There is no VDPAU driver for Intel, fallback to the generic
* OpenGL/VAAPI va_gl backend to emulate VDPAU. Otherwise,
* guess that the DRI and VDPAU drivers have the same name.
*/
if (strcmp(driver_names[0], "i965") == 0 ||
strcmp(driver_names[0], "iris") == 0 ||
strcmp(driver_names[0], "crocus") == 0) {
driver_names[1] = "va_gl";
} else {
driver_names[1] = driver_names[0];
}
info.numDrivers = 2;
info.driverNames = driver_names;
} else {
/* EGL_MESA_query_driver was unavailable; let dri2.c select the
* driver and fill in these fields for us.
*/
info.numDrivers = 0;
info.driverNames = NULL;
}
return DRI2ScreenInit(screen, &info);
}
void
ms_dri2_close_screen(ScreenPtr screen)
{
DRI2CloseScreen(screen);
}
#endif /* GLAMOR_HAS_GBM */
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