// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
* Copyright 2009 - 2023 VMware , Inc . , Palo Alto , CA . , USA
*
* 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 , sub license , 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 NON - INFRINGEMENT . IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS , AUTHORS AND / OR ITS SUPPLIERS 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 .
*
**************************************************************************/
#include "vmwgfx_bo.h"
#include "vmwgfx_drv.h"
#include "device_include/svga_overlay.h"
#include "device_include/svga_escape.h"
#include <drm/ttm/ttm_placement.h>
#define VMW_MAX_NUM_STREAMS 1
#define VMW_OVERLAY_CAP_MASK (SVGA_FIFO_CAP_VIDEO | SVGA_FIFO_CAP_ESCAPE)
struct vmw_stream {
struct vmw_bo *buf;
bool claimed;
bool paused;
struct drm_vmw_control_stream_arg saved;
};
/*
* Overlay control
*/
struct vmw_overlay {
/*
* Each stream is a single overlay . In Xv these are called ports .
*/
struct mutex mutex;
struct vmw_stream stream[VMW_MAX_NUM_STREAMS];
};
struct vmw_escape_header {
uint32_t cmd;
SVGAFifoCmdEscape body;
};
struct vmw_escape_video_flush {
struct vmw_escape_header escape;
SVGAEscapeVideoFlush flush;
};
static inline void fill_escape(struct vmw_escape_header *header,
uint32_t size)
{
header->cmd = SVGA_CMD_ESCAPE;
header->body.nsid = SVGA_ESCAPE_NSID_VMWARE;
header->body.size = size;
}
static inline void fill_flush(struct vmw_escape_video_flush *cmd,
uint32_t stream_id)
{
fill_escape(&cmd->escape, sizeof (cmd->flush));
cmd->flush.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_FLUSH;
cmd->flush.streamId = stream_id;
}
/*
* Send put command to hw .
*
* Returns
* - ERESTARTSYS if interrupted by a signal .
*/
static int vmw_overlay_send_put(struct vmw_private *dev_priv,
struct vmw_bo *buf,
struct drm_vmw_control_stream_arg *arg,
bool interruptible)
{
struct vmw_escape_video_flush *flush;
size_t fifo_size;
bool have_so = (dev_priv->active_display_unit != vmw_du_legacy);
int i, num_items;
SVGAGuestPtr ptr;
struct {
struct vmw_escape_header escape;
struct {
uint32_t cmdType;
uint32_t streamId;
} header;
} *cmds;
struct {
uint32_t registerId;
uint32_t value;
} *items;
/* defines are a index needs + 1 */
if (have_so)
num_items = SVGA_VIDEO_DST_SCREEN_ID + 1 ;
else
num_items = SVGA_VIDEO_PITCH_3 + 1 ;
fifo_size = sizeof (*cmds) + sizeof (*flush) + sizeof (*items) * num_items;
cmds = VMW_CMD_RESERVE(dev_priv, fifo_size);
/* hardware has hung, can't do anything here */
if (!cmds)
return -ENOMEM;
items = (typeof(items))&cmds[1 ];
flush = (struct vmw_escape_video_flush *)&items[num_items];
/* the size is header + number of items */
fill_escape(&cmds->escape, sizeof (*items) * (num_items + 1 ));
cmds->header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS;
cmds->header.streamId = arg->stream_id;
/* the IDs are neatly numbered */
for (i = 0 ; i < num_items; i++)
items[i].registerId = i;
vmw_bo_get_guest_ptr(&buf->tbo, &ptr);
ptr.offset += arg->offset;
items[SVGA_VIDEO_ENABLED].value = true ;
items[SVGA_VIDEO_FLAGS].value = arg->flags;
items[SVGA_VIDEO_DATA_OFFSET].value = ptr.offset;
items[SVGA_VIDEO_FORMAT].value = arg->format;
items[SVGA_VIDEO_COLORKEY].value = arg->color_key;
items[SVGA_VIDEO_SIZE].value = arg->size;
items[SVGA_VIDEO_WIDTH].value = arg->width;
items[SVGA_VIDEO_HEIGHT].value = arg->height;
items[SVGA_VIDEO_SRC_X].value = arg->src.x;
items[SVGA_VIDEO_SRC_Y].value = arg->src.y;
items[SVGA_VIDEO_SRC_WIDTH].value = arg->src.w;
items[SVGA_VIDEO_SRC_HEIGHT].value = arg->src.h;
items[SVGA_VIDEO_DST_X].value = arg->dst.x;
items[SVGA_VIDEO_DST_Y].value = arg->dst.y;
items[SVGA_VIDEO_DST_WIDTH].value = arg->dst.w;
items[SVGA_VIDEO_DST_HEIGHT].value = arg->dst.h;
items[SVGA_VIDEO_PITCH_1].value = arg->pitch[0 ];
items[SVGA_VIDEO_PITCH_2].value = arg->pitch[1 ];
items[SVGA_VIDEO_PITCH_3].value = arg->pitch[2 ];
if (have_so) {
items[SVGA_VIDEO_DATA_GMRID].value = ptr.gmrId;
items[SVGA_VIDEO_DST_SCREEN_ID].value = SVGA_ID_INVALID;
}
fill_flush(flush, arg->stream_id);
vmw_cmd_commit(dev_priv, fifo_size);
return 0 ;
}
/*
* Send stop command to hw .
*
* Returns
* - ERESTARTSYS if interrupted by a signal .
*/
static int vmw_overlay_send_stop(struct vmw_private *dev_priv,
uint32_t stream_id,
bool interruptible)
{
struct {
struct vmw_escape_header escape;
SVGAEscapeVideoSetRegs body;
struct vmw_escape_video_flush flush;
} *cmds;
int ret;
for (;;) {
cmds = VMW_CMD_RESERVE(dev_priv, sizeof (*cmds));
if (cmds)
break ;
ret = vmw_fallback_wait(dev_priv, false , true , 0 ,
interruptible, 3 *HZ);
if (interruptible && ret == -ERESTARTSYS)
return ret;
else
BUG_ON(ret != 0 );
}
fill_escape(&cmds->escape, sizeof (cmds->body));
cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS;
cmds->body.header.streamId = stream_id;
cmds->body.items[0 ].registerId = SVGA_VIDEO_ENABLED;
cmds->body.items[0 ].value = false ;
fill_flush(&cmds->flush, stream_id);
vmw_cmd_commit(dev_priv, sizeof (*cmds));
return 0 ;
}
/*
* Move a buffer to vram or gmr if @ pin is set , else unpin the buffer .
*
* With the introduction of screen objects buffers could now be
* used with GMRs instead of being locked to vram .
*/
static int vmw_overlay_move_buffer(struct vmw_private *dev_priv,
struct vmw_bo *buf,
bool pin, bool inter)
{
if (!pin)
return vmw_bo_unpin(dev_priv, buf, inter);
if (dev_priv->active_display_unit == vmw_du_legacy)
return vmw_bo_pin_in_vram(dev_priv, buf, inter);
return vmw_bo_pin_in_vram_or_gmr(dev_priv, buf, inter);
}
/*
* Stop or pause a stream .
*
* If the stream is paused the no evict flag is removed from the buffer
* but left in vram . This allows for instance mode_set to evict it
* should it need to .
*
* The caller must hold the overlay lock .
*
* @ stream_id which stream to stop / pause .
* @ pause true to pause , false to stop completely .
*/
static int vmw_overlay_stop(struct vmw_private *dev_priv,
uint32_t stream_id, bool pause,
bool interruptible)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
struct vmw_stream *stream = &overlay->stream[stream_id];
int ret;
/* no buffer attached the stream is completely stopped */
if (!stream->buf)
return 0 ;
/* If the stream is paused this is already done */
if (!stream->paused) {
ret = vmw_overlay_send_stop(dev_priv, stream_id,
interruptible);
if (ret)
return ret;
/* We just remove the NO_EVICT flag so no -ENOMEM */
ret = vmw_overlay_move_buffer(dev_priv, stream->buf, false ,
interruptible);
if (interruptible && ret == -ERESTARTSYS)
return ret;
else
BUG_ON(ret != 0 );
}
if (!pause) {
vmw_bo_unreference(&stream->buf);
stream->paused = false ;
} else {
stream->paused = true ;
}
return 0 ;
}
/*
* Update a stream and send any put or stop fifo commands needed .
*
* The caller must hold the overlay lock .
*
* Returns
* - ENOMEM if buffer doesn ' t fit in vram .
* - ERESTARTSYS if interrupted .
*/
static int vmw_overlay_update_stream(struct vmw_private *dev_priv,
struct vmw_bo *buf,
struct drm_vmw_control_stream_arg *arg,
bool interruptible)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
struct vmw_stream *stream = &overlay->stream[arg->stream_id];
int ret = 0 ;
if (!buf)
return -EINVAL;
DRM_DEBUG(" %s: old %p, new %p, %spaused\n" , __func__,
stream->buf, buf, stream->paused ? "" : "not " );
if (stream->buf != buf) {
ret = vmw_overlay_stop(dev_priv, arg->stream_id,
false , interruptible);
if (ret)
return ret;
} else if (!stream->paused) {
/* If the buffers match and not paused then just send
* the put command , no need to do anything else .
*/
ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible);
if (ret == 0 )
stream->saved = *arg;
else
BUG_ON(!interruptible);
return ret;
}
/* We don't start the old stream if we are interrupted.
* Might return - ENOMEM if it can ' t fit the buffer in vram .
*/
ret = vmw_overlay_move_buffer(dev_priv, buf, true , interruptible);
if (ret)
return ret;
ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible);
if (ret) {
/* This one needs to happen no matter what. We only remove
* the NO_EVICT flag so this is safe from - ENOMEM .
*/
BUG_ON(vmw_overlay_move_buffer(dev_priv, buf, false , false )
!= 0 );
return ret;
}
if (stream->buf != buf)
stream->buf = vmw_bo_reference(buf);
stream->saved = *arg;
/* stream is no longer stopped/paused */
stream->paused = false ;
return 0 ;
}
/*
* Try to resume all paused streams .
*
* Used by the kms code after moving a new scanout buffer to vram .
*
* Takes the overlay lock .
*/
int vmw_overlay_resume_all(struct vmw_private *dev_priv)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
int i, ret;
if (!overlay)
return 0 ;
mutex_lock(&overlay->mutex);
for (i = 0 ; i < VMW_MAX_NUM_STREAMS; i++) {
struct vmw_stream *stream = &overlay->stream[i];
if (!stream->paused)
continue ;
ret = vmw_overlay_update_stream(dev_priv, stream->buf,
&stream->saved, false );
if (ret != 0 )
DRM_INFO("%s: *warning* failed to resume stream %i\n" ,
__func__, i);
}
mutex_unlock(&overlay->mutex);
return 0 ;
}
/*
* Pauses all active streams .
*
* Used by the kms code when moving a new scanout buffer to vram .
*
* Takes the overlay lock .
*/
int vmw_overlay_pause_all(struct vmw_private *dev_priv)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
int i, ret;
if (!overlay)
return 0 ;
mutex_lock(&overlay->mutex);
for (i = 0 ; i < VMW_MAX_NUM_STREAMS; i++) {
if (overlay->stream[i].paused)
DRM_INFO("%s: *warning* stream %i already paused\n" ,
__func__, i);
ret = vmw_overlay_stop(dev_priv, i, true , false );
WARN_ON(ret != 0 );
}
mutex_unlock(&overlay->mutex);
return 0 ;
}
static bool vmw_overlay_available(const struct vmw_private *dev_priv)
{
return (dev_priv->overlay_priv != NULL &&
((vmw_fifo_caps(dev_priv) & VMW_OVERLAY_CAP_MASK) ==
VMW_OVERLAY_CAP_MASK));
}
int vmw_overlay_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_overlay *overlay = dev_priv->overlay_priv;
struct drm_vmw_control_stream_arg *arg =
(struct drm_vmw_control_stream_arg *)data;
struct vmw_bo *buf;
struct vmw_resource *res;
int ret;
if (!vmw_overlay_available(dev_priv))
return -ENOSYS;
ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res);
if (ret)
return ret;
mutex_lock(&overlay->mutex);
if (!arg->enabled) {
ret = vmw_overlay_stop(dev_priv, arg->stream_id, false , true );
goto out_unlock;
}
ret = vmw_user_bo_lookup(file_priv, arg->handle, &buf);
if (ret)
goto out_unlock;
ret = vmw_overlay_update_stream(dev_priv, buf, arg, true );
vmw_user_bo_unref(&buf);
out_unlock:
mutex_unlock(&overlay->mutex);
vmw_resource_unreference(&res);
return ret;
}
int vmw_overlay_num_overlays(struct vmw_private *dev_priv)
{
if (!vmw_overlay_available(dev_priv))
return 0 ;
return VMW_MAX_NUM_STREAMS;
}
int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
int i, k;
if (!vmw_overlay_available(dev_priv))
return 0 ;
mutex_lock(&overlay->mutex);
for (i = 0 , k = 0 ; i < VMW_MAX_NUM_STREAMS; i++)
if (!overlay->stream[i].claimed)
k++;
mutex_unlock(&overlay->mutex);
return k;
}
int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
int i;
if (!overlay)
return -ENOSYS;
mutex_lock(&overlay->mutex);
for (i = 0 ; i < VMW_MAX_NUM_STREAMS; i++) {
if (overlay->stream[i].claimed)
continue ;
overlay->stream[i].claimed = true ;
*out = i;
mutex_unlock(&overlay->mutex);
return 0 ;
}
mutex_unlock(&overlay->mutex);
return -ESRCH;
}
int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS);
if (!overlay)
return -ENOSYS;
mutex_lock(&overlay->mutex);
WARN_ON(!overlay->stream[stream_id].claimed);
vmw_overlay_stop(dev_priv, stream_id, false , false );
overlay->stream[stream_id].claimed = false ;
mutex_unlock(&overlay->mutex);
return 0 ;
}
int vmw_overlay_init(struct vmw_private *dev_priv)
{
struct vmw_overlay *overlay;
int i;
if (dev_priv->overlay_priv)
return -EINVAL;
overlay = kzalloc(sizeof (*overlay), GFP_KERNEL);
if (!overlay)
return -ENOMEM;
mutex_init(&overlay->mutex);
for (i = 0 ; i < VMW_MAX_NUM_STREAMS; i++) {
overlay->stream[i].buf = NULL;
overlay->stream[i].paused = false ;
overlay->stream[i].claimed = false ;
}
dev_priv->overlay_priv = overlay;
return 0 ;
}
int vmw_overlay_close(struct vmw_private *dev_priv)
{
struct vmw_overlay *overlay = dev_priv->overlay_priv;
bool forgotten_buffer = false ;
int i;
if (!overlay)
return -ENOSYS;
for (i = 0 ; i < VMW_MAX_NUM_STREAMS; i++) {
if (overlay->stream[i].buf) {
forgotten_buffer = true ;
vmw_overlay_stop(dev_priv, i, false , false );
}
}
WARN_ON(forgotten_buffer);
dev_priv->overlay_priv = NULL;
kfree(overlay);
return 0 ;
}
Messung V0.5 in Prozent C=95 H=96 G=95
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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