- 根目录:
- drivers
- gpu
- drm
- vmwgfx
- vmwgfx_overlay.c
/**************************************************************************
*
* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* 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 "drmP.h"
#include "vmwgfx_drv.h"
#include "ttm/ttm_placement.h"
#include "svga_overlay.h"
#include "svga_escape.h"
#define VMW_MAX_NUM_STREAMS 1
struct vmw_stream {
struct vmw_dma_buffer *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];
};
static inline struct vmw_overlay *vmw_overlay(struct drm_device *dev)
{
struct vmw_private *dev_priv = vmw_priv(dev);
return dev_priv ? dev_priv->overlay_priv : NULL;
}
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;
}
/**
* Pin or unpin a buffer in vram.
*
* @dev_priv: Driver private.
* @buf: DMA buffer to pin or unpin.
* @pin: Pin buffer in vram if true.
* @interruptible: Use interruptible wait.
*
* Takes the current masters ttm lock in read.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
static int vmw_dmabuf_pin_in_vram(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool pin, bool interruptible)
{
struct ttm_buffer_object *bo = &buf->base;
struct ttm_placement *overlay_placement = &vmw_vram_placement;
int ret;
ret = ttm_read_lock(&dev_priv->active_master->lock, interruptible);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(bo, interruptible, false, false, 0);
if (unlikely(ret != 0))
goto err;
if (pin)
overlay_placement = &vmw_vram_ne_placement;
ret = ttm_bo_validate(bo, overlay_placement, interruptible, false, false);
ttm_bo_unreserve(bo);
err:
ttm_read_unlock(&dev_priv->active_master->lock);
return ret;
}
/**
* 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_dma_buffer *buf,
struct drm_vmw_control_stream_arg *arg,
bool interruptible)
{
struct {
struct vmw_escape_header escape;
struct {
struct {
uint32_t cmdType;
uint32_t streamId;
} header;
struct {
uint32_t registerId;
uint32_t value;
} items[SVGA_VIDEO_PITCH_3 + 1];
} body;
struct vmw_escape_video_flush flush;
} *cmds;
uint32_t offset;
int i, ret;
for (;;) {
cmds = vmw_fifo_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 = arg->stream_id;
for (i = 0; i <= SVGA_VIDEO_PITCH_3; i++)
cmds->body.items[i].registerId = i;
offset = buf->base.offset + arg->offset;
cmds->body.items[SVGA_VIDEO_ENABLED].value = true;
cmds->body.items[SVGA_VIDEO_FLAGS].value = arg->flags;
cmds->body.items[SVGA_VIDEO_DATA_OFFSET].value = offset;
cmds->body.items[SVGA_VIDEO_FORMAT].value = arg->format;
cmds->body.items[SVGA_VIDEO_COLORKEY].value = arg->color_key;
cmds->body.items[SVGA_VIDEO_SIZE].value = arg->size;
cmds->body.items[SVGA_VIDEO_WIDTH].value = arg->width;
cmds->body.items[SVGA_VIDEO_HEIGHT].value = arg->height;
cmds->body.items[SVGA_VIDEO_SRC_X].value = arg->src.x;
cmds->body.items[SVGA_VIDEO_SRC_Y].value = arg->src.y;
cmds->body.items[SVGA_VIDEO_SRC_WIDTH].value = arg->src.w;
cmds->body.items[SVGA_VIDEO_SRC_HEIGHT].value = arg->src.h;
cmds->body.items[SVGA_VIDEO_DST_X].value = arg->dst.x;
cmds->body.items[SVGA_VIDEO_DST_Y].value = arg->dst.y;
cmds->body.items[SVGA_VIDEO_DST_WIDTH].value = arg->dst.w;
cmds->body.items[SVGA_VIDEO_DST_HEIGHT].value = arg->dst.h;
cmds->body.items[SVGA_VIDEO_PITCH_1].value = arg->pitch[0];
cmds->body.items[SVGA_VIDEO_PITCH_2].value = arg->pitch[1];
cmds->body.items[SVGA_VIDEO_PITCH_3].value = arg->pitch[2];
fill_flush(&cmds->flush, arg->stream_id);
vmw_fifo_commit(dev_priv, sizeof(*cmds));
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_fifo_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_fifo_commit(dev_priv, sizeof(*cmds));
return 0;
}
/**
* 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_dmabuf_pin_in_vram(dev_priv, stream->buf, false,
interruptible);
if (interruptible && ret == -ERESTARTSYS)
return ret;
else
BUG_ON(ret != 0);
}
if (!pause) {
vmw_dmabuf_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_dma_buffer *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_dmabuf_pin_in_vram(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_dmabuf_pin_in_vram(dev_priv, buf, false, false) != 0);
return ret;
}
if (stream->buf != buf)
stream->buf = vmw_dmabuf_reference(buf);
stream->saved = *arg;
/* stream is no longer stopped/paused */
stream->paused = false;
return 0;
}
/**
* Stop all streams.
*
* Used by the fb code when starting.
*
* Takes the overlay lock.
*/
int vmw_overlay_stop_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->buf)
continue;
ret = vmw_overlay_stop(dev_priv, i, false, false);
WARN_ON(ret != 0);
}
mutex_unlock(&overlay->mutex);
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;
}
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_dma_buffer *buf;
struct vmw_resource *res;
int ret;
if (!overlay)
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_dmabuf_lookup(tfile, arg->handle, &buf);
if (ret)
goto out_unlock;
ret = vmw_overlay_update_stream(dev_priv, buf, arg, true);
vmw_dmabuf_unreference(&buf);
out_unlock:
mutex_unlock(&overlay->mutex);
vmw_resource_unreference(&res);
return ret;
}
int vmw_overlay_num_overlays(struct vmw_private *dev_priv)
{
if (!dev_priv->overlay_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 (!overlay)
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;
if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_VIDEO) &&
(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_ESCAPE)) {
DRM_INFO("hardware doesn't support overlays\n");
return -ENOSYS;
}
overlay = kmalloc(sizeof(*overlay), GFP_KERNEL);
if (!overlay)
return -ENOMEM;
memset(overlay, 0, sizeof(*overlay));
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;
}