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drm/vmwgfx: Fix up the implicit display unit handling 

Make the connector is_implicit property immutable.
As far as we know, no user-space application is writing to it.

Also move the verification that all implicit display units scan out
from the same framebuffer to atomic_check().

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
This commit is contained in:
Thomas Hellstrom 2018-10-04 22:38:17 +00:00
parent 66502d494b
commit 9d9486e437
6 changed files with 98 additions and 291 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -484,8 +484,6 @@ struct vmw_private {
struct vmw_overlay *overlay_priv;
struct drm_property *hotplug_mode_update_property;
struct drm_property *implicit_placement_property;
unsigned num_implicit;
struct vmw_framebuffer *implicit_fb;
struct mutex global_kms_state_mutex;
spinlock_t cursor_lock;
struct drm_atomic_state *suspend_state;

277
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
View File

@ -457,21 +457,8 @@ int vmw_du_primary_plane_atomic_check(struct drm_plane *plane,
struct drm_crtc *crtc = state->crtc;
struct vmw_connector_state *vcs;
struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
struct vmw_private *dev_priv = vmw_priv(crtc->dev);
struct vmw_framebuffer *vfb = vmw_framebuffer_to_vfb(new_fb);
vcs = vmw_connector_state_to_vcs(du->connector.state);
/* Only one active implicit framebuffer at a time. */
mutex_lock(&dev_priv->global_kms_state_mutex);
if (vcs->is_implicit && dev_priv->implicit_fb &&
!(dev_priv->num_implicit == 1 && du->active_implicit)
&& dev_priv->implicit_fb != vfb) {
DRM_ERROR("Multiple implicit framebuffers "
"not supported.\n");
ret = -EINVAL;
}
mutex_unlock(&dev_priv->global_kms_state_mutex);
}
@ -1519,6 +1506,88 @@ static int vmw_kms_check_display_memory(struct drm_device *dev,
return 0;
}
/**
* vmw_crtc_state_and_lock - Return new or current crtc state with locked
* crtc mutex
* @state: The atomic state pointer containing the new atomic state
* @crtc: The crtc
*
* This function returns the new crtc state if it's part of the state update.
* Otherwise returns the current crtc state. It also makes sure that the
* crtc mutex is locked.
*
* Returns: A valid crtc state pointer or NULL. It may also return a
* pointer error, in particular -EDEADLK if locking needs to be rerun.
*/
static struct drm_crtc_state *
vmw_crtc_state_and_lock(struct drm_atomic_state *state, struct drm_crtc *crtc)
{
struct drm_crtc_state *crtc_state;
crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
if (crtc_state) {
lockdep_assert_held(&crtc->mutex.mutex.base);
} else {
int ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
if (ret != 0 && ret != -EALREADY)
return ERR_PTR(ret);
crtc_state = crtc->state;
}
return crtc_state;
}
/**
* vmw_kms_check_implicit - Verify that all implicit display units scan out
* from the same fb after the new state is committed.
* @dev: The drm_device.
* @state: The new state to be checked.
*
* Returns:
* Zero on success,
* -EINVAL on invalid state,
* -EDEADLK if modeset locking needs to be rerun.
*/
static int vmw_kms_check_implicit(struct drm_device *dev,
struct drm_atomic_state *state)
{
struct drm_framebuffer *implicit_fb = NULL;
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;
struct drm_plane_state *plane_state;
drm_for_each_crtc(crtc, dev) {
struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
if (!du->is_implicit)
continue;
crtc_state = vmw_crtc_state_and_lock(state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
if (!crtc_state || !crtc_state->enable)
continue;
/*
* Can't move primary planes across crtcs, so this is OK.
* It also means we don't need to take the plane mutex.
*/
plane_state = du->primary.state;
if (plane_state->crtc != crtc)
continue;
if (!implicit_fb)
implicit_fb = plane_state->fb;
else if (implicit_fb != plane_state->fb)
return -EINVAL;
}
return 0;
}
/**
* vmw_kms_check_topology - Validates topology in drm_atomic_state
* @dev: DRM device
@ -1636,6 +1705,10 @@ vmw_kms_atomic_check_modeset(struct drm_device *dev,
if (ret)
return ret;
ret = vmw_kms_check_implicit(dev, state);
if (ret)
return ret;
if (!state->allow_modeset)
return ret;
@ -2230,84 +2303,6 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
return 1;
}
int vmw_du_connector_set_property(struct drm_connector *connector,
struct drm_property *property,
uint64_t val)
{
struct vmw_display_unit *du = vmw_connector_to_du(connector);
struct vmw_private *dev_priv = vmw_priv(connector->dev);
if (property == dev_priv->implicit_placement_property)
du->is_implicit = val;
return 0;
}
/**
* vmw_du_connector_atomic_set_property - Atomic version of get property
*
* @crtc - crtc the property is associated with
*
* Returns:
* Zero on success, negative errno on failure.
*/
int
vmw_du_connector_atomic_set_property(struct drm_connector *connector,
struct drm_connector_state *state,
struct drm_property *property,
uint64_t val)
{
struct vmw_private *dev_priv = vmw_priv(connector->dev);
struct vmw_connector_state *vcs = vmw_connector_state_to_vcs(state);
struct vmw_display_unit *du = vmw_connector_to_du(connector);
if (property == dev_priv->implicit_placement_property) {
vcs->is_implicit = val;
/*
* We should really be doing a drm_atomic_commit() to
* commit the new state, but since this doesn't cause
* an immedate state change, this is probably ok
*/
du->is_implicit = vcs->is_implicit;
} else {
return -EINVAL;
}
return 0;
}
/**
* vmw_du_connector_atomic_get_property - Atomic version of get property
*
* @connector - connector the property is associated with
*
* Returns:
* Zero on success, negative errno on failure.
*/
int
vmw_du_connector_atomic_get_property(struct drm_connector *connector,
const struct drm_connector_state *state,
struct drm_property *property,
uint64_t *val)
{
struct vmw_private *dev_priv = vmw_priv(connector->dev);
struct vmw_connector_state *vcs = vmw_connector_state_to_vcs(state);
if (property == dev_priv->implicit_placement_property)
*val = vcs->is_implicit;
else {
DRM_ERROR("Invalid Property %s\n", property->name);
return -EINVAL;
}
return 0;
}
/**
* vmw_kms_update_layout_ioctl - Handler for DRM_VMW_UPDATE_LAYOUT ioctl
* @dev: drm device for the ioctl
@ -2696,120 +2691,24 @@ int vmw_kms_fbdev_init_data(struct vmw_private *dev_priv,
return ret;
}
/**
* vmw_kms_del_active - unregister a crtc binding to the implicit framebuffer
*
* @dev_priv: Pointer to a device private struct.
* @du: The display unit of the crtc.
*/
void vmw_kms_del_active(struct vmw_private *dev_priv,
struct vmw_display_unit *du)
{
mutex_lock(&dev_priv->global_kms_state_mutex);
if (du->active_implicit) {
if (--(dev_priv->num_implicit) == 0)
dev_priv->implicit_fb = NULL;
du->active_implicit = false;
}
mutex_unlock(&dev_priv->global_kms_state_mutex);
}
/**
* vmw_kms_add_active - register a crtc binding to an implicit framebuffer
*
* @vmw_priv: Pointer to a device private struct.
* @du: The display unit of the crtc.
* @vfb: The implicit framebuffer
*
* Registers a binding to an implicit framebuffer.
*/
void vmw_kms_add_active(struct vmw_private *dev_priv,
struct vmw_display_unit *du,
struct vmw_framebuffer *vfb)
{
mutex_lock(&dev_priv->global_kms_state_mutex);
WARN_ON_ONCE(!dev_priv->num_implicit && dev_priv->implicit_fb);
if (!du->active_implicit && du->is_implicit) {
dev_priv->implicit_fb = vfb;
du->active_implicit = true;
dev_priv->num_implicit++;
}
mutex_unlock(&dev_priv->global_kms_state_mutex);
}
/**
* vmw_kms_screen_object_flippable - Check whether we can page-flip a crtc.
*
* @dev_priv: Pointer to device-private struct.
* @crtc: The crtc we want to flip.
*
* Returns true or false depending whether it's OK to flip this crtc
* based on the criterion that we must not have more than one implicit
* frame-buffer at any one time.
*/
bool vmw_kms_crtc_flippable(struct vmw_private *dev_priv,
struct drm_crtc *crtc)
{
struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
bool ret;
mutex_lock(&dev_priv->global_kms_state_mutex);
ret = !du->is_implicit || dev_priv->num_implicit == 1;
mutex_unlock(&dev_priv->global_kms_state_mutex);
return ret;
}
/**
* vmw_kms_update_implicit_fb - Update the implicit fb.
*
* @dev_priv: Pointer to device-private struct.
* @crtc: The crtc the new implicit frame-buffer is bound to.
*/
void vmw_kms_update_implicit_fb(struct vmw_private *dev_priv,
struct drm_crtc *crtc)
{
struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
struct drm_plane *plane = crtc->primary;
struct vmw_framebuffer *vfb;
mutex_lock(&dev_priv->global_kms_state_mutex);
if (!du->is_implicit)
goto out_unlock;
vfb = vmw_framebuffer_to_vfb(plane->state->fb);
WARN_ON_ONCE(dev_priv->num_implicit != 1 &&
dev_priv->implicit_fb != vfb);
dev_priv->implicit_fb = vfb;
out_unlock:
mutex_unlock(&dev_priv->global_kms_state_mutex);
}
/**
* vmw_kms_create_implicit_placement_proparty - Set up the implicit placement
* property.
*
* @dev_priv: Pointer to a device private struct.
* @immutable: Whether the property is immutable.
*
* Sets up the implicit placement property unless it's already set up.
*/
void
vmw_kms_create_implicit_placement_property(struct vmw_private *dev_priv,
bool immutable)
vmw_kms_create_implicit_placement_property(struct vmw_private *dev_priv)
{
if (dev_priv->implicit_placement_property)
return;
dev_priv->implicit_placement_property =
drm_property_create_range(dev_priv->dev,
immutable ?
DRM_MODE_PROP_IMMUTABLE : 0,
DRM_MODE_PROP_IMMUTABLE,
"implicit_placement", 0, 1);
}
/**

16
drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
View File

@ -307,8 +307,6 @@ struct vmw_plane_state {
struct vmw_connector_state {
struct drm_connector_state base;
bool is_implicit;
/**
* @gui_x:
*
@ -370,7 +368,6 @@ struct vmw_display_unit {
int gui_x;
int gui_y;
bool is_implicit;
bool active_implicit;
int set_gui_x;
int set_gui_y;
};
@ -450,17 +447,8 @@ int vmw_kms_fbdev_init_data(struct vmw_private *dev_priv,
struct drm_crtc **p_crtc,
struct drm_display_mode **p_mode);
void vmw_guess_mode_timing(struct drm_display_mode *mode);
void vmw_kms_del_active(struct vmw_private *dev_priv,
struct vmw_display_unit *du);
void vmw_kms_add_active(struct vmw_private *dev_priv,
struct vmw_display_unit *du,
struct vmw_framebuffer *vfb);
bool vmw_kms_crtc_flippable(struct vmw_private *dev_priv,
struct drm_crtc *crtc);
void vmw_kms_update_implicit_fb(struct vmw_private *dev_priv,
struct drm_crtc *crtc);
void vmw_kms_create_implicit_placement_property(struct vmw_private *dev_priv,
bool immutable);
void vmw_kms_update_implicit_fb(struct vmw_private *dev_priv);
void vmw_kms_create_implicit_placement_property(struct vmw_private *dev_priv);
/* Universal Plane Helpers */
void vmw_du_primary_plane_destroy(struct drm_plane *plane);

9
drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
View File

@ -263,13 +263,10 @@ static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
.dpms = vmw_du_connector_dpms,
.detect = vmw_du_connector_detect,
.fill_modes = vmw_du_connector_fill_modes,
.set_property = vmw_du_connector_set_property,
.destroy = vmw_ldu_connector_destroy,
.reset = vmw_du_connector_reset,
.atomic_duplicate_state = vmw_du_connector_duplicate_state,
.atomic_destroy_state = vmw_du_connector_destroy_state,
.atomic_set_property = vmw_du_connector_atomic_set_property,
.atomic_get_property = vmw_du_connector_atomic_get_property,
};
static const struct
@ -416,7 +413,6 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
vmw_du_connector_reset(connector);
ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
@ -427,8 +423,6 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
connector->status = vmw_du_connector_detect(connector, true);
vmw_connector_state_to_vcs(connector->state)->is_implicit = true;
ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
DRM_MODE_ENCODER_VIRTUAL, NULL);
@ -447,7 +441,6 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
goto err_free_encoder;
}
vmw_du_crtc_reset(crtc);
ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
&ldu->base.cursor,
@ -513,7 +506,7 @@ int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
if (ret != 0)
goto err_free;
vmw_kms_create_implicit_placement_property(dev_priv, true);
vmw_kms_create_implicit_placement_property(dev_priv);
if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)

39
drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
View File

@ -247,28 +247,20 @@ static void vmw_sou_crtc_mode_set_nofb(struct drm_crtc *crtc)
sou->buffer = vps->bo;
sou->buffer_size = vps->bo_size;
if (sou->base.is_implicit) {
x = crtc->x;
y = crtc->y;
} else {
conn_state = sou->base.connector.state;
vmw_conn_state = vmw_connector_state_to_vcs(conn_state);
conn_state = sou->base.connector.state;
vmw_conn_state = vmw_connector_state_to_vcs(conn_state);
x = vmw_conn_state->gui_x;
y = vmw_conn_state->gui_y;
}
x = vmw_conn_state->gui_x;
y = vmw_conn_state->gui_y;
ret = vmw_sou_fifo_create(dev_priv, sou, x, y, &crtc->mode);
if (ret)
DRM_ERROR("Failed to define Screen Object %dx%d\n",
crtc->x, crtc->y);
vmw_kms_add_active(dev_priv, &sou->base, vfb);
} else {
sou->buffer = NULL;
sou->buffer_size = 0;
vmw_kms_del_active(dev_priv, &sou->base);
}
}
@ -329,21 +321,14 @@ static int vmw_sou_crtc_page_flip(struct drm_crtc *crtc,
uint32_t flags,
struct drm_modeset_acquire_ctx *ctx)
{
struct vmw_private *dev_priv = vmw_priv(crtc->dev);
int ret;
if (!vmw_kms_crtc_flippable(dev_priv, crtc))
return -EINVAL;
ret = drm_atomic_helper_page_flip(crtc, new_fb, event, flags, ctx);
if (ret) {
DRM_ERROR("Page flip error %d.\n", ret);
return ret;
}
if (vmw_crtc_to_du(crtc)->is_implicit)
vmw_kms_update_implicit_fb(dev_priv, crtc);
return ret;
}
@ -383,13 +368,10 @@ static const struct drm_connector_funcs vmw_sou_connector_funcs = {
.dpms = vmw_du_connector_dpms,
.detect = vmw_du_connector_detect,
.fill_modes = vmw_du_connector_fill_modes,
.set_property = vmw_du_connector_set_property,
.destroy = vmw_sou_connector_destroy,
.reset = vmw_du_connector_reset,
.atomic_duplicate_state = vmw_du_connector_duplicate_state,
.atomic_destroy_state = vmw_du_connector_destroy_state,
.atomic_set_property = vmw_du_connector_atomic_set_property,
.atomic_get_property = vmw_du_connector_atomic_get_property,
};
@ -883,7 +865,6 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
primary = &sou->base.primary;
cursor = &sou->base.cursor;
sou->base.active_implicit = false;
sou->base.pref_active = (unit == 0);
sou->base.pref_width = dev_priv->initial_width;
sou->base.pref_height = dev_priv->initial_height;
@ -937,8 +918,6 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
drm_connector_helper_add(connector, &vmw_sou_connector_helper_funcs);
connector->status = vmw_du_connector_detect(connector, true);
vmw_connector_state_to_vcs(connector->state)->is_implicit = false;
ret = drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
DRM_MODE_ENCODER_VIRTUAL, NULL);
@ -977,12 +956,6 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
dev->mode_config.suggested_x_property, 0);
drm_object_attach_property(&connector->base,
dev->mode_config.suggested_y_property, 0);
if (dev_priv->implicit_placement_property)
drm_object_attach_property
(&connector->base,
dev_priv->implicit_placement_property,
sou->base.is_implicit);
return 0;
err_free_unregister:
@ -1008,15 +981,11 @@ int vmw_kms_sou_init_display(struct vmw_private *dev_priv)
}
ret = -ENOMEM;
dev_priv->num_implicit = 0;
dev_priv->implicit_fb = NULL;
ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
if (unlikely(ret != 0))
return ret;
vmw_kms_create_implicit_placement_property(dev_priv, false);
for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
vmw_sou_init(dev_priv, i);

46
drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
View File

@ -400,13 +400,8 @@ static void vmw_stdu_crtc_mode_set_nofb(struct drm_crtc *crtc)
if (!crtc->state->enable)
return;
if (stdu->base.is_implicit) {
x = crtc->x;
y = crtc->y;
} else {
x = vmw_conn_state->gui_x;
y = vmw_conn_state->gui_y;
}
x = vmw_conn_state->gui_x;
y = vmw_conn_state->gui_y;
vmw_svga_enable(dev_priv);
ret = vmw_stdu_define_st(dev_priv, stdu, &crtc->mode, x, y);
@ -421,27 +416,9 @@ static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
{
}
static void vmw_stdu_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct drm_plane_state *plane_state = crtc->primary->state;
struct vmw_private *dev_priv;
struct vmw_screen_target_display_unit *stdu;
struct vmw_framebuffer *vfb;
struct drm_framebuffer *fb;
stdu = vmw_crtc_to_stdu(crtc);
dev_priv = vmw_priv(crtc->dev);
fb = plane_state->fb;
vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
if (vfb)
vmw_kms_add_active(dev_priv, &stdu->base, vfb);
else
vmw_kms_del_active(dev_priv, &stdu->base);
}
static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
@ -501,11 +478,10 @@ static int vmw_stdu_crtc_page_flip(struct drm_crtc *crtc,
struct drm_modeset_acquire_ctx *ctx)
{
struct vmw_private *dev_priv = vmw_priv(crtc->dev);
struct vmw_screen_target_display_unit *stdu = vmw_crtc_to_stdu(crtc);
int ret;
if (!stdu->defined || !vmw_kms_crtc_flippable(dev_priv, crtc))
if (!stdu->defined)
return -EINVAL;
ret = drm_atomic_helper_page_flip(crtc, new_fb, event, flags, ctx);
@ -1046,13 +1022,10 @@ static const struct drm_connector_funcs vmw_stdu_connector_funcs = {
.dpms = vmw_du_connector_dpms,
.detect = vmw_du_connector_detect,
.fill_modes = vmw_du_connector_fill_modes,
.set_property = vmw_du_connector_set_property,
.destroy = vmw_stdu_connector_destroy,
.reset = vmw_du_connector_reset,
.atomic_duplicate_state = vmw_du_connector_duplicate_state,
.atomic_destroy_state = vmw_du_connector_destroy_state,
.atomic_set_property = vmw_du_connector_atomic_set_property,
.atomic_get_property = vmw_du_connector_atomic_get_property,
};
@ -1826,11 +1799,6 @@ static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
stdu->base.pref_active = (unit == 0);
stdu->base.pref_width = dev_priv->initial_width;
stdu->base.pref_height = dev_priv->initial_height;
/*
* Remove this after enabling atomic because property values can
* only exist in a state object
*/
stdu->base.is_implicit = false;
/* Initialize primary plane */
@ -1876,7 +1844,6 @@ static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
drm_connector_helper_add(connector, &vmw_stdu_connector_helper_funcs);
connector->status = vmw_du_connector_detect(connector, false);
vmw_connector_state_to_vcs(connector->state)->is_implicit = false;
ret = drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
DRM_MODE_ENCODER_VIRTUAL, NULL);
@ -1914,11 +1881,6 @@ static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
dev->mode_config.suggested_x_property, 0);
drm_object_attach_property(&connector->base,
dev->mode_config.suggested_y_property, 0);
if (dev_priv->implicit_placement_property)
drm_object_attach_property
(&connector->base,
dev_priv->implicit_placement_property,
stdu->base.is_implicit);
return 0;
err_free_unregister:
@ -1987,8 +1949,6 @@ int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
dev_priv->active_display_unit = vmw_du_screen_target;
vmw_kms_create_implicit_placement_property(dev_priv, false);
for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) {
ret = vmw_stdu_init(dev_priv, i);