* [PATCH 02/37] drm/doc: integrate drm_crtc.c kerneldoc
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 03/37] drm: add drm_modeset_lock|unlock_all Daniel Vetter
` (26 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
And do a quick pass to adjust them to the last few (years?) of changes
...
This time actually compile-tested ;-)
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
Documentation/DocBook/drm.tmpl | 4 ++
drivers/gpu/drm/drm_crtc.c | 92 +++++++++++++++++++---------------------
2 files changed, 48 insertions(+), 48 deletions(-)
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index 4ee2304..caab791 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -1609,6 +1609,10 @@ void intel_crt_init(struct drm_device *dev)
make its properties available to applications.
</para>
</sect2>
+ <sect2>
+ <title>KMS API Functions</title>
+!Edrivers/gpu/drm/drm_crtc.c
+ </sect2>
</sect1>
<!-- Internals: kms helper functions -->
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 7902d3c..f22d4a7 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -203,10 +203,10 @@ char *drm_get_connector_status_name(enum drm_connector_status status)
}
/**
- * drm_mode_object_get - allocate a new identifier
+ * drm_mode_object_get - allocate a new modeset identifier
* @dev: DRM device
- * @ptr: object pointer, used to generate unique ID
- * @type: object type
+ * @obj: object pointer, used to generate unique ID
+ * @obj_type: object type
*
* Create a unique identifier based on @ptr in @dev's identifier space. Used
* for tracking modes, CRTCs and connectors.
@@ -241,9 +241,9 @@ again:
}
/**
- * drm_mode_object_put - free an identifer
+ * drm_mode_object_put - free a modeset identifer
* @dev: DRM device
- * @id: ID to free
+ * @object: object to free
*
* Free @id from @dev's unique identifier pool.
*/
@@ -273,6 +273,8 @@ EXPORT_SYMBOL(drm_mode_object_find);
/**
* drm_framebuffer_init - initialize a framebuffer
* @dev: DRM device
+ * @fb: framebuffer to be initialized
+ * @funcs: ... with these functions
*
* Allocates an ID for the framebuffer's parent mode object, sets its mode
* functions & device file and adds it to the master fd list.
@@ -309,6 +311,9 @@ static void drm_framebuffer_free(struct kref *kref)
/**
* drm_framebuffer_unreference - unref a framebuffer
+ * @fb: framebuffer to unref
+ *
+ * This functions decrements the fb's refcount and frees it if it drops to zero.
*/
void drm_framebuffer_unreference(struct drm_framebuffer *fb)
{
@@ -321,6 +326,7 @@ EXPORT_SYMBOL(drm_framebuffer_unreference);
/**
* drm_framebuffer_reference - incr the fb refcnt
+ * @fb: framebuffer
*/
void drm_framebuffer_reference(struct drm_framebuffer *fb)
{
@@ -493,7 +499,7 @@ EXPORT_SYMBOL(drm_mode_remove);
* @dev: DRM device
* @connector: the connector to init
* @funcs: callbacks for this connector
- * @name: user visible name of the connector
+ * @connector_type: user visible type of the connector
*
* Initialises a preallocated connector. Connectors should be
* subclassed as part of driver connector objects.
@@ -1145,10 +1151,9 @@ static int drm_crtc_convert_umode(struct drm_display_mode *out,
/**
* drm_mode_getresources - get graphics configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Construct a set of configuration description structures and return
* them to the user, including CRTC, connector and framebuffer configuration.
@@ -1330,10 +1335,9 @@ out:
/**
* drm_mode_getcrtc - get CRTC configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Construct a CRTC configuration structure to return to the user.
*
@@ -1387,10 +1391,9 @@ out:
/**
* drm_mode_getconnector - get connector configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Construct a connector configuration structure to return to the user.
*
@@ -1675,7 +1678,7 @@ out:
* drm_mode_setplane - set up or tear down an plane
* @dev: DRM device
* @data: ioctl data*
- * @file_prive: DRM file info
+ * @file_priv: DRM file info
*
* Set plane info, including placement, fb, scaling, and other factors.
* Or pass a NULL fb to disable.
@@ -1801,10 +1804,9 @@ out:
/**
* drm_mode_setcrtc - set CRTC configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Build a new CRTC configuration based on user request.
*
@@ -2056,10 +2058,9 @@ EXPORT_SYMBOL(drm_mode_legacy_fb_format);
/**
* drm_mode_addfb - add an FB to the graphics configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Add a new FB to the specified CRTC, given a user request.
*
@@ -2237,10 +2238,9 @@ static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
/**
* drm_mode_addfb2 - add an FB to the graphics configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Add a new FB to the specified CRTC, given a user request with format.
*
@@ -2300,10 +2300,9 @@ out:
/**
* drm_mode_rmfb - remove an FB from the configuration
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Remove the FB specified by the user.
*
@@ -2352,10 +2351,9 @@ out:
/**
* drm_mode_getfb - get FB info
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Lookup the FB given its ID and return info about it.
*
@@ -2471,7 +2469,7 @@ out_err1:
/**
* drm_fb_release - remove and free the FBs on this file
- * @filp: file * from the ioctl
+ * @priv: drm file for the ioctl
*
* Destroy all the FBs associated with @filp.
*
@@ -2581,10 +2579,9 @@ EXPORT_SYMBOL(drm_mode_detachmode_crtc);
/**
* drm_fb_attachmode - Attach a user mode to an connector
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* This attaches a user specified mode to an connector.
* Called by the user via ioctl.
@@ -2636,10 +2633,9 @@ out:
/**
* drm_fb_detachmode - Detach a user specified mode from an connector
- * @inode: inode from the ioctl
- * @filp: file * from the ioctl
- * @cmd: cmd from ioctl
- * @arg: arg from ioctl
+ * @dev: drm device for the ioctl
+ * @data: data pointer for the ioctl
+ * @file_priv: drm file for the ioctl call
*
* Called by the user via ioctl.
*
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 03/37] drm: add drm_modeset_lock|unlock_all
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
2012-12-12 13:06 ` [PATCH 02/37] drm/doc: integrate drm_crtc.c kerneldoc Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write Daniel Vetter
` (25 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
This is the first step towards introducing the new modeset locking
scheme. The plan is to put helper functions into place at all the
right places step-by-step, so that the final patch to switch on the
new locking scheme doesn't need to touch every single driver.
This helper here will serve as the shotgun solutions for all places
where a more fine-grained locking isn't (yet) implemented.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 147 +++++++++++++++++++++----------------
drivers/gpu/drm/drm_crtc_helper.c | 8 +-
drivers/gpu/drm/drm_fb_helper.c | 20 ++---
include/drm/drm_crtc.h | 3 +
4 files changed, 102 insertions(+), 76 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index f22d4a7..5d223af 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -37,6 +37,29 @@
#include <drm/drm_edid.h>
#include <drm/drm_fourcc.h>
+/**
+ * drm_modeset_lock_all - take all modeset locks
+ * @dev: drm device
+ *
+ * This function takes all modeset locks, suitable where a more fine-grained
+ * scheme isn't (yet) implemented.
+ */
+void drm_modeset_lock_all(struct drm_device *dev)
+{
+ mutex_lock(&dev->mode_config.mutex);
+}
+EXPORT_SYMBOL(drm_modeset_lock_all);
+
+/**
+ * drm_modeset_unlock_all - drop all modeset locks
+ * @drm: device
+ */
+void drm_modeset_unlock_all(struct drm_device *dev)
+{
+ mutex_unlock(&dev->mode_config.mutex);
+}
+EXPORT_SYMBOL(drm_modeset_unlock_all);
+
/* Avoid boilerplate. I'm tired of typing. */
#define DRM_ENUM_NAME_FN(fnname, list) \
char *fnname(int val) \
@@ -427,7 +450,7 @@ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
crtc->funcs = funcs;
crtc->invert_dimensions = false;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
if (ret)
@@ -439,7 +462,7 @@ int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
dev->mode_config.num_crtc++;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -514,7 +537,7 @@ int drm_connector_init(struct drm_device *dev,
{
int ret;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
if (ret)
@@ -544,7 +567,7 @@ int drm_connector_init(struct drm_device *dev,
dev->mode_config.dpms_property, 0);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -594,7 +617,7 @@ int drm_encoder_init(struct drm_device *dev,
{
int ret;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
if (ret)
@@ -608,7 +631,7 @@ int drm_encoder_init(struct drm_device *dev,
dev->mode_config.num_encoder++;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -617,11 +640,11 @@ EXPORT_SYMBOL(drm_encoder_init);
void drm_encoder_cleanup(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
drm_mode_object_put(dev, &encoder->base);
list_del(&encoder->head);
dev->mode_config.num_encoder--;
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
}
EXPORT_SYMBOL(drm_encoder_cleanup);
@@ -633,7 +656,7 @@ int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
{
int ret;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
if (ret)
@@ -667,7 +690,7 @@ int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -677,7 +700,7 @@ void drm_plane_cleanup(struct drm_plane *plane)
{
struct drm_device *dev = plane->dev;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
kfree(plane->format_types);
drm_mode_object_put(dev, &plane->base);
/* if not added to a list, it must be a private plane */
@@ -685,7 +708,7 @@ void drm_plane_cleanup(struct drm_plane *plane)
list_del(&plane->head);
dev->mode_config.num_plane--;
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
}
EXPORT_SYMBOL(drm_plane_cleanup);
@@ -965,9 +988,9 @@ void drm_mode_config_init(struct drm_device *dev)
INIT_LIST_HEAD(&dev->mode_config.plane_list);
idr_init(&dev->mode_config.crtc_idr);
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
drm_mode_create_standard_connector_properties(dev);
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
/* Just to be sure */
dev->mode_config.num_fb = 0;
@@ -1187,7 +1210,7 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
/*
* For the non-control nodes we need to limit the list of resources
@@ -1329,7 +1352,7 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
card_res->count_connectors, card_res->count_encoders);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1357,7 +1380,7 @@ int drm_mode_getcrtc(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
DRM_MODE_OBJECT_CRTC);
@@ -1385,7 +1408,7 @@ int drm_mode_getcrtc(struct drm_device *dev,
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1428,7 +1451,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, out_resp->connector_id,
DRM_MODE_OBJECT_CONNECTOR);
@@ -1525,7 +1548,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out_resp->count_encoders = encoders_count;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1540,7 +1563,7 @@ int drm_mode_getencoder(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, enc_resp->encoder_id,
DRM_MODE_OBJECT_ENCODER);
if (!obj) {
@@ -1559,7 +1582,7 @@ int drm_mode_getencoder(struct drm_device *dev, void *data,
enc_resp->possible_clones = encoder->possible_clones;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1583,7 +1606,7 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
config = &dev->mode_config;
/*
@@ -1605,7 +1628,7 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
plane_resp->count_planes = config->num_plane;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1630,7 +1653,7 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, plane_resp->plane_id,
DRM_MODE_OBJECT_PLANE);
if (!obj) {
@@ -1670,7 +1693,7 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
plane_resp->count_format_types = plane->format_count;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1698,7 +1721,7 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
/*
* First, find the plane, crtc, and fb objects. If not available,
@@ -1797,7 +1820,7 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1837,7 +1860,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
return -ERANGE;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, crtc_req->crtc_id,
DRM_MODE_OBJECT_CRTC);
if (!obj) {
@@ -1970,7 +1993,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
out:
kfree(connector_set);
drm_mode_destroy(dev, mode);
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1988,7 +2011,7 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
if (!obj) {
DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
@@ -2016,7 +2039,7 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
}
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2095,7 +2118,7 @@ int drm_mode_addfb(struct drm_device *dev,
if ((config->min_height > r.height) || (r.height > config->max_height))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
/* TODO check buffer is sufficiently large */
/* TODO setup destructor callback */
@@ -2112,7 +2135,7 @@ int drm_mode_addfb(struct drm_device *dev,
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2280,7 +2303,7 @@ int drm_mode_addfb2(struct drm_device *dev,
if (ret)
return ret;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
if (IS_ERR(fb)) {
@@ -2294,7 +2317,7 @@ int drm_mode_addfb2(struct drm_device *dev,
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2324,7 +2347,7 @@ int drm_mode_rmfb(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, *id, DRM_MODE_OBJECT_FB);
/* TODO check that we really get a framebuffer back. */
if (!obj) {
@@ -2345,7 +2368,7 @@ int drm_mode_rmfb(struct drm_device *dev,
drm_framebuffer_remove(fb);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2373,7 +2396,7 @@ int drm_mode_getfb(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
if (!obj) {
ret = -EINVAL;
@@ -2389,7 +2412,7 @@ int drm_mode_getfb(struct drm_device *dev,
fb->funcs->create_handle(fb, file_priv, &r->handle);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2408,7 +2431,7 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
if (!obj) {
ret = -EINVAL;
@@ -2462,7 +2485,7 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
out_err2:
kfree(clips);
out_err1:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2483,11 +2506,11 @@ void drm_fb_release(struct drm_file *priv)
struct drm_device *dev = priv->minor->dev;
struct drm_framebuffer *fb, *tfb;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
drm_framebuffer_remove(fb);
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
}
/**
@@ -2602,7 +2625,7 @@ int drm_mode_attachmode_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
if (!obj) {
@@ -2626,7 +2649,7 @@ int drm_mode_attachmode_ioctl(struct drm_device *dev,
drm_mode_attachmode(dev, connector, mode);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2655,7 +2678,7 @@ int drm_mode_detachmode_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
if (!obj) {
@@ -2672,7 +2695,7 @@ int drm_mode_detachmode_ioctl(struct drm_device *dev,
ret = drm_mode_detachmode(dev, connector, &mode);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2939,7 +2962,7 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
if (!obj) {
ret = -EINVAL;
@@ -3017,7 +3040,7 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev,
out_resp->count_enum_blobs = blob_count;
}
done:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3068,7 +3091,7 @@ int drm_mode_getblob_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
if (!obj) {
ret = -EINVAL;
@@ -3086,7 +3109,7 @@ int drm_mode_getblob_ioctl(struct drm_device *dev,
out_resp->length = blob->length;
done:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3228,7 +3251,7 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
if (!obj) {
@@ -3265,7 +3288,7 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
}
arg->count_props = props_count;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3282,7 +3305,7 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
if (!arg_obj)
@@ -3320,7 +3343,7 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3382,7 +3405,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
if (!obj) {
ret = -EINVAL;
@@ -3423,7 +3446,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3441,7 +3464,7 @@ int drm_mode_gamma_get_ioctl(struct drm_device *dev,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
if (!obj) {
ret = -EINVAL;
@@ -3474,7 +3497,7 @@ int drm_mode_gamma_get_ioctl(struct drm_device *dev,
goto out;
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3494,7 +3517,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
page_flip->reserved != 0)
return -EINVAL;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
if (!obj)
goto out;
@@ -3572,7 +3595,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 7b2d378..400ef86 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -980,7 +980,7 @@ static void output_poll_execute(struct work_struct *work)
if (!drm_kms_helper_poll)
return;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
/* Ignore forced connectors. */
@@ -1010,7 +1010,7 @@ static void output_poll_execute(struct work_struct *work)
changed = true;
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
if (changed)
drm_kms_helper_hotplug_event(dev);
@@ -1070,7 +1070,7 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
if (!dev->mode_config.poll_enabled)
return;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
/* Only handle HPD capable connectors. */
@@ -1088,7 +1088,7 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
changed = true;
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
if (changed)
drm_kms_helper_hotplug_event(dev);
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 05e623a..d84ec67 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -337,7 +337,7 @@ static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
/*
* For each CRTC in this fb, turn the connectors on/off.
*/
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
for (i = 0; i < fb_helper->crtc_count; i++) {
crtc = fb_helper->crtc_info[i].mode_set.crtc;
@@ -352,7 +352,7 @@ static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode)
dev->mode_config.dpms_property, dpms_mode);
}
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
}
int drm_fb_helper_blank(int blank, struct fb_info *info)
@@ -672,16 +672,16 @@ int drm_fb_helper_set_par(struct fb_info *info)
return -EINVAL;
}
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
for (i = 0; i < fb_helper->crtc_count; i++) {
crtc = fb_helper->crtc_info[i].mode_set.crtc;
ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
if (ret) {
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
if (fb_helper->delayed_hotplug) {
fb_helper->delayed_hotplug = false;
@@ -701,7 +701,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
int ret = 0;
int i;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
for (i = 0; i < fb_helper->crtc_count; i++) {
crtc = fb_helper->crtc_info[i].mode_set.crtc;
@@ -718,7 +718,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
}
}
}
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
EXPORT_SYMBOL(drm_fb_helper_pan_display);
@@ -1375,7 +1375,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
if (!fb_helper->fb)
return 0;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (crtc->fb)
crtcs_bound++;
@@ -1385,7 +1385,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
if (bound < crtcs_bound) {
fb_helper->delayed_hotplug = true;
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return 0;
}
DRM_DEBUG_KMS("\n");
@@ -1397,7 +1397,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
max_height);
drm_setup_crtcs(fb_helper);
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
}
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 3538eda..b487922 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -842,6 +842,9 @@ struct drm_prop_enum_list {
char *name;
};
+extern void drm_modeset_lock_all(struct drm_device *dev);
+extern void drm_modeset_unlock_all(struct drm_device *dev);
+
extern int drm_crtc_init(struct drm_device *dev,
struct drm_crtc *crtc,
const struct drm_crtc_funcs *funcs);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
2012-12-12 13:06 ` [PATCH 02/37] drm/doc: integrate drm_crtc.c kerneldoc Daniel Vetter
2012-12-12 13:06 ` [PATCH 03/37] drm: add drm_modeset_lock|unlock_all Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 20:54 ` [Intel-gfx] " Jesse Barnes
2012-12-12 13:06 ` [PATCH 06/37] drm/gma500: use drm_modeset_lock_all Daniel Vetter
` (24 subsequent siblings)
27 siblings, 1 reply; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
Spinning for up to 200 us with interrupts locked out is not good. So
let's just spin (and even that seems to be excessive).
And we don't call these functions from interrupt context, so this is
not required. Besides that doing anything in interrupt contexts which
might take a few hundred us is a no-go. So just convert the entire
thing to a mutex. Also move the mutex-grabbing out of the read/write
functions (add a WARN_ON(!is_locked)) instead) since all callers are
nicely grouped together.
Finally the real motivation for this change: Dont grab the modeset
mutex in the dpio debugfs file, we don't need that consistency. And
correctness of the dpio interface is ensured with the dpio_lock.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/i915/i915_debugfs.c | 4 +--
drivers/gpu/drm/i915/i915_dma.c | 2 +-
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/intel_display.c | 53 ++++++++++++++--------------------
4 files changed, 25 insertions(+), 36 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 58e6676..35d2ace 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1553,7 +1553,7 @@ static int i915_dpio_info(struct seq_file *m, void *data)
return 0;
}
- ret = mutex_lock_interruptible(&dev->mode_config.mutex);
+ ret = mutex_lock_interruptible(&dev_priv->dpio_lock);
if (ret)
return ret;
@@ -1582,7 +1582,7 @@ static int i915_dpio_info(struct seq_file *m, void *data)
seq_printf(m, "DPIO_FASTCLK_DISABLE: 0x%08x\n",
intel_dpio_read(dev_priv, DPIO_FASTCLK_DISABLE));
- mutex_unlock(&dev->mode_config.mutex);
+ mutex_unlock(&dev_priv->dpio_lock);
return 0;
}
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 2635ee6..ad488f6 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1579,7 +1579,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
spin_lock_init(&dev_priv->irq_lock);
spin_lock_init(&dev_priv->error_lock);
spin_lock_init(&dev_priv->rps.lock);
- spin_lock_init(&dev_priv->dpio_lock);
+ mutex_init(&dev_priv->dpio_lock);
mutex_init(&dev_priv->rps.hw_lock);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e2944e9..6fa0c00 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -655,7 +655,7 @@ typedef struct drm_i915_private {
spinlock_t irq_lock;
/* DPIO indirect register protection */
- spinlock_t dpio_lock;
+ struct mutex dpio_lock;
/** Cached value of IMR to avoid reads in updating the bitfield */
u32 pipestat[2];
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d303f2a..a0d8869 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -416,13 +416,11 @@ static const intel_limit_t intel_limits_vlv_dp = {
u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
{
- unsigned long flags;
- u32 val = 0;
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
- spin_lock_irqsave(&dev_priv->dpio_lock, flags);
if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
DRM_ERROR("DPIO idle wait timed out\n");
- goto out_unlock;
+ return 0;
}
I915_WRITE(DPIO_REG, reg);
@@ -430,24 +428,20 @@ u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
DPIO_BYTE);
if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
DRM_ERROR("DPIO read wait timed out\n");
- goto out_unlock;
+ return 0;
}
- val = I915_READ(DPIO_DATA);
-out_unlock:
- spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
- return val;
+ return I915_READ(DPIO_DATA);
}
static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
u32 val)
{
- unsigned long flags;
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
- spin_lock_irqsave(&dev_priv->dpio_lock, flags);
if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
DRM_ERROR("DPIO idle wait timed out\n");
- goto out_unlock;
+ return;
}
I915_WRITE(DPIO_DATA, val);
@@ -456,9 +450,6 @@ static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
DPIO_BYTE);
if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100))
DRM_ERROR("DPIO write wait timed out\n");
-
-out_unlock:
- spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
}
static void vlv_init_dpio(struct drm_device *dev)
@@ -1455,13 +1446,12 @@ static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
static void
intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
{
- unsigned long flags;
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
- spin_lock_irqsave(&dev_priv->dpio_lock, flags);
if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to become ready\n");
- goto out_unlock;
+ return;
}
I915_WRITE(SBI_ADDR,
@@ -1475,24 +1465,19 @@ intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
- goto out_unlock;
+ return;
}
-
-out_unlock:
- spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
}
static u32
intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
{
- unsigned long flags;
- u32 value = 0;
+ WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
- spin_lock_irqsave(&dev_priv->dpio_lock, flags);
if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to become ready\n");
- goto out_unlock;
+ return 0;
}
I915_WRITE(SBI_ADDR,
@@ -1504,14 +1489,10 @@ intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
- goto out_unlock;
+ return 0;
}
- value = I915_READ(SBI_DATA);
-
-out_unlock:
- spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
- return value;
+ return I915_READ(SBI_DATA);
}
/**
@@ -2960,6 +2941,8 @@ static void lpt_program_iclkip(struct drm_crtc *crtc)
u32 divsel, phaseinc, auxdiv, phasedir = 0;
u32 temp;
+ mutex_lock(&dev_priv->dpio_lock);
+
/* It is necessary to ungate the pixclk gate prior to programming
* the divisors, and gate it back when it is done.
*/
@@ -3041,6 +3024,8 @@ static void lpt_program_iclkip(struct drm_crtc *crtc)
udelay(24);
I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
+
+ mutex_unlock(&dev_priv->dpio_lock);
}
/*
@@ -4268,6 +4253,8 @@ static void vlv_update_pll(struct drm_crtc *crtc,
bool is_sdvo;
u32 temp;
+ mutex_lock(&dev_priv->dpio_lock);
+
is_sdvo = intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ||
intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI);
@@ -4351,6 +4338,8 @@ static void vlv_update_pll(struct drm_crtc *crtc,
temp |= (1 << 21);
intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL2, temp);
}
+
+ mutex_unlock(&dev_priv->dpio_lock);
}
static void i9xx_update_pll(struct drm_crtc *crtc,
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* Re: [Intel-gfx] [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write
2012-12-12 13:06 ` [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write Daniel Vetter
@ 2012-12-12 20:54 ` Jesse Barnes
2012-12-12 22:00 ` Daniel Vetter
0 siblings, 1 reply; 59+ messages in thread
From: Jesse Barnes @ 2012-12-12 20:54 UTC (permalink / raw)
To: Daniel Vetter
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, DRI Development
On Wed, 12 Dec 2012 14:06:44 +0100
Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
> Spinning for up to 200 us with interrupts locked out is not good. So
> let's just spin (and even that seems to be excessive).
>
> And we don't call these functions from interrupt context, so this is
> not required. Besides that doing anything in interrupt contexts which
> might take a few hundred us is a no-go. So just convert the entire
> thing to a mutex. Also move the mutex-grabbing out of the read/write
> functions (add a WARN_ON(!is_locked)) instead) since all callers are
> nicely grouped together.
>
> Finally the real motivation for this change: Dont grab the modeset
> mutex in the dpio debugfs file, we don't need that consistency. And
> correctness of the dpio interface is ensured with the dpio_lock.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 4 +--
> drivers/gpu/drm/i915/i915_dma.c | 2 +-
> drivers/gpu/drm/i915/i915_drv.h | 2 +-
> drivers/gpu/drm/i915/intel_display.c | 53 ++++++++++++++--------------------
> 4 files changed, 25 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 58e6676..35d2ace 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -1553,7 +1553,7 @@ static int i915_dpio_info(struct seq_file *m, void *data)
> return 0;
> }
>
> - ret = mutex_lock_interruptible(&dev->mode_config.mutex);
> + ret = mutex_lock_interruptible(&dev_priv->dpio_lock);
> if (ret)
> return ret;
>
> @@ -1582,7 +1582,7 @@ static int i915_dpio_info(struct seq_file *m, void *data)
> seq_printf(m, "DPIO_FASTCLK_DISABLE: 0x%08x\n",
> intel_dpio_read(dev_priv, DPIO_FASTCLK_DISABLE));
>
> - mutex_unlock(&dev->mode_config.mutex);
> + mutex_unlock(&dev_priv->dpio_lock);
>
> return 0;
> }
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 2635ee6..ad488f6 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -1579,7 +1579,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
> spin_lock_init(&dev_priv->irq_lock);
> spin_lock_init(&dev_priv->error_lock);
> spin_lock_init(&dev_priv->rps.lock);
> - spin_lock_init(&dev_priv->dpio_lock);
> + mutex_init(&dev_priv->dpio_lock);
>
> mutex_init(&dev_priv->rps.hw_lock);
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index e2944e9..6fa0c00 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -655,7 +655,7 @@ typedef struct drm_i915_private {
> spinlock_t irq_lock;
>
> /* DPIO indirect register protection */
> - spinlock_t dpio_lock;
> + struct mutex dpio_lock;
>
> /** Cached value of IMR to avoid reads in updating the bitfield */
> u32 pipestat[2];
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index d303f2a..a0d8869 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -416,13 +416,11 @@ static const intel_limit_t intel_limits_vlv_dp = {
>
> u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
> {
> - unsigned long flags;
> - u32 val = 0;
> + WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
>
> - spin_lock_irqsave(&dev_priv->dpio_lock, flags);
> if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
> DRM_ERROR("DPIO idle wait timed out\n");
> - goto out_unlock;
> + return 0;
> }
>
> I915_WRITE(DPIO_REG, reg);
> @@ -430,24 +428,20 @@ u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
> DPIO_BYTE);
> if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
> DRM_ERROR("DPIO read wait timed out\n");
> - goto out_unlock;
> + return 0;
> }
> - val = I915_READ(DPIO_DATA);
>
> -out_unlock:
> - spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
> - return val;
> + return I915_READ(DPIO_DATA);
> }
>
> static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
> u32 val)
> {
> - unsigned long flags;
> + WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
>
> - spin_lock_irqsave(&dev_priv->dpio_lock, flags);
> if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
> DRM_ERROR("DPIO idle wait timed out\n");
> - goto out_unlock;
> + return;
> }
>
> I915_WRITE(DPIO_DATA, val);
> @@ -456,9 +450,6 @@ static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
> DPIO_BYTE);
> if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100))
> DRM_ERROR("DPIO write wait timed out\n");
> -
> -out_unlock:
> - spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
> }
>
> static void vlv_init_dpio(struct drm_device *dev)
> @@ -1455,13 +1446,12 @@ static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
> static void
> intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
> {
> - unsigned long flags;
> + WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
>
> - spin_lock_irqsave(&dev_priv->dpio_lock, flags);
> if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
> 100)) {
> DRM_ERROR("timeout waiting for SBI to become ready\n");
> - goto out_unlock;
> + return;
> }
>
> I915_WRITE(SBI_ADDR,
> @@ -1475,24 +1465,19 @@ intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
> if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
> 100)) {
> DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
> - goto out_unlock;
> + return;
> }
> -
> -out_unlock:
> - spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
> }
>
> static u32
> intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
> {
> - unsigned long flags;
> - u32 value = 0;
> + WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
>
> - spin_lock_irqsave(&dev_priv->dpio_lock, flags);
> if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
> 100)) {
> DRM_ERROR("timeout waiting for SBI to become ready\n");
> - goto out_unlock;
> + return 0;
> }
>
> I915_WRITE(SBI_ADDR,
> @@ -1504,14 +1489,10 @@ intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
> if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
> 100)) {
> DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
> - goto out_unlock;
> + return 0;
> }
>
> - value = I915_READ(SBI_DATA);
> -
> -out_unlock:
> - spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
> - return value;
> + return I915_READ(SBI_DATA);
> }
>
> /**
> @@ -2960,6 +2941,8 @@ static void lpt_program_iclkip(struct drm_crtc *crtc)
> u32 divsel, phaseinc, auxdiv, phasedir = 0;
> u32 temp;
>
> + mutex_lock(&dev_priv->dpio_lock);
> +
> /* It is necessary to ungate the pixclk gate prior to programming
> * the divisors, and gate it back when it is done.
> */
> @@ -3041,6 +3024,8 @@ static void lpt_program_iclkip(struct drm_crtc *crtc)
> udelay(24);
>
> I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
> +
> + mutex_unlock(&dev_priv->dpio_lock);
> }
>
> /*
> @@ -4268,6 +4253,8 @@ static void vlv_update_pll(struct drm_crtc *crtc,
> bool is_sdvo;
> u32 temp;
>
> + mutex_lock(&dev_priv->dpio_lock);
> +
> is_sdvo = intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ||
> intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI);
>
> @@ -4351,6 +4338,8 @@ static void vlv_update_pll(struct drm_crtc *crtc,
> temp |= (1 << 21);
> intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL2, temp);
> }
> +
> + mutex_unlock(&dev_priv->dpio_lock);
> }
>
> static void i9xx_update_pll(struct drm_crtc *crtc,
Looks fine, I guess you could convert the wait_for_atomic_us to the
non-atomic variant now that you have a mutex. Either way:
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
--
Jesse Barnes, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 59+ messages in thread* Re: [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write
2012-12-12 20:54 ` [Intel-gfx] " Jesse Barnes
@ 2012-12-12 22:00 ` Daniel Vetter
2012-12-12 22:05 ` Jesse Barnes
0 siblings, 1 reply; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 22:00 UTC (permalink / raw)
To: Jesse Barnes
Cc: Daniel Vetter, Intel Graphics Development, Radeon Dev,
DRI Development, Nouveau Dev
On Wed, Dec 12, 2012 at 12:54:47PM -0800, Jesse Barnes wrote:
> On Wed, 12 Dec 2012 14:06:44 +0100
> Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
>
> > Spinning for up to 200 us with interrupts locked out is not good. So
> > let's just spin (and even that seems to be excessive).
> >
> > And we don't call these functions from interrupt context, so this is
> > not required. Besides that doing anything in interrupt contexts which
> > might take a few hundred us is a no-go. So just convert the entire
> > thing to a mutex. Also move the mutex-grabbing out of the read/write
> > functions (add a WARN_ON(!is_locked)) instead) since all callers are
> > nicely grouped together.
> >
> > Finally the real motivation for this change: Dont grab the modeset
> > mutex in the dpio debugfs file, we don't need that consistency. And
> > correctness of the dpio interface is ensured with the dpio_lock.
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
>
> Looks fine, I guess you could convert the wait_for_atomic_us to the
> non-atomic variant now that you have a mutex. Either way:
I like that _us purely to document the correct timeout ...
> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Queued for -next, thanks for the review.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
^ permalink raw reply [flat|nested] 59+ messages in thread
* Re: [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write
2012-12-12 22:00 ` Daniel Vetter
@ 2012-12-12 22:05 ` Jesse Barnes
0 siblings, 0 replies; 59+ messages in thread
From: Jesse Barnes @ 2012-12-12 22:05 UTC (permalink / raw)
To: Daniel Vetter
Cc: Daniel Vetter, Intel Graphics Development, Radeon Dev,
DRI Development, Nouveau Dev
On Wed, 12 Dec 2012 23:00:34 +0100
Daniel Vetter <daniel@ffwll.ch> wrote:
> On Wed, Dec 12, 2012 at 12:54:47PM -0800, Jesse Barnes wrote:
> > On Wed, 12 Dec 2012 14:06:44 +0100
> > Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
> >
> > > Spinning for up to 200 us with interrupts locked out is not good. So
> > > let's just spin (and even that seems to be excessive).
> > >
> > > And we don't call these functions from interrupt context, so this is
> > > not required. Besides that doing anything in interrupt contexts which
> > > might take a few hundred us is a no-go. So just convert the entire
> > > thing to a mutex. Also move the mutex-grabbing out of the read/write
> > > functions (add a WARN_ON(!is_locked)) instead) since all callers are
> > > nicely grouped together.
> > >
> > > Finally the real motivation for this change: Dont grab the modeset
> > > mutex in the dpio debugfs file, we don't need that consistency. And
> > > correctness of the dpio interface is ensured with the dpio_lock.
> > >
> > > Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> >
> > Looks fine, I guess you could convert the wait_for_atomic_us to the
> > non-atomic variant now that you have a mutex. Either way:
>
> I like that _us purely to document the correct timeout ...
Yeah we'd need a non-atomic _us variant to clean it up. No biggie.
--
Jesse Barnes, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 59+ messages in thread
* [PATCH 06/37] drm/gma500: use drm_modeset_lock_all
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (2 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 04/37] drm/i915: rework locking for intel_dpio|sbi_read|write Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 07/37] drm/ast: " Daniel Vetter
` (23 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Only two places:
- suspend/resume
- Some really strange mode validation tool with too much funny-lucking
hand-rolled conversion code.
Better safe than sorry, so convert both places to keep the locking
semantics as much as possible.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/gma500/psb_drv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index dd1fbfa..2bf0c92 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -476,7 +476,7 @@ static int psb_mode_operation_ioctl(struct drm_device *dev, void *data,
case PSB_MODE_OPERATION_MODE_VALID:
umode = &arg->mode;
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, obj_id,
DRM_MODE_OBJECT_CONNECTOR);
@@ -525,7 +525,7 @@ static int psb_mode_operation_ioctl(struct drm_device *dev, void *data,
if (mode)
drm_mode_destroy(dev, mode);
mode_op_out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
default:
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 07/37] drm/ast: use drm_modeset_lock_all
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (3 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 06/37] drm/gma500: use drm_modeset_lock_all Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 09/37] drm/vmgfx: " Daniel Vetter
` (22 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
Just a call to drm_helper_resume_force_mode, obviously wants full
locking for that.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/ast/ast_drv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index 31123b6..f5f24b3 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -95,9 +95,9 @@ static int ast_drm_thaw(struct drm_device *dev)
ast_post_gpu(dev);
drm_mode_config_reset(dev);
- mutex_lock(&dev->mode_config.mutex);
+ drm_modeset_lock_all(dev);
drm_helper_resume_force_mode(dev);
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
console_lock();
ast_fbdev_set_suspend(dev, 0);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 09/37] drm/vmgfx: use drm_modeset_lock_all
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (4 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 07/37] drm/ast: " Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 12/37] drm/radeon: make indirect register access concurrency-safe Daniel Vetter
` (21 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Ok, this one here is a bit more complicated, but for an RFC I've
figured I can be a bit sloppy. So just convert ever mutex_lock call,
including the interruptible one. Since other places (e.g. in the
execbuf ioctl) take the mode_config.mutex without bothering with
interruptible handling, I've figured I should be able to get away with
this in a few more places ...
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
index 2f7c08e..13e4371 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
@@ -161,11 +161,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
goto out_no_copy;
}
- ret = mutex_lock_interruptible(&dev->mode_config.mutex);
- if (unlikely(ret != 0)) {
- ret = -ERESTARTSYS;
- goto out_no_mode_mutex;
- }
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
if (!obj) {
@@ -198,8 +194,7 @@ out_no_surface:
ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
out_no_fb:
- mutex_unlock(&dev->mode_config.mutex);
-out_no_mode_mutex:
+ drm_modeset_unlock_all(dev);
out_no_copy:
kfree(clips);
out_clips:
@@ -249,11 +244,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
goto out_no_copy;
}
- ret = mutex_lock_interruptible(&dev->mode_config.mutex);
- if (unlikely(ret != 0)) {
- ret = -ERESTARTSYS;
- goto out_no_mode_mutex;
- }
+ drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
if (!obj) {
@@ -280,8 +271,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
out_no_fb:
- mutex_unlock(&dev->mode_config.mutex);
-out_no_mode_mutex:
+ drm_modeset_unlock_all(dev);
out_no_copy:
kfree(clips);
out_clips:
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 12/37] drm/radeon: make indirect register access concurrency-safe
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (5 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 09/37] drm/vmgfx: " Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 13/37] drm/nouveau: protect evo_wait/evo_kick sections with a channel mutex Daniel Vetter
` (20 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
With the new per-crtc locking mutliple set-cursor calls could happen
in parallel. Out of sheer paranoia I've opted for an irqsave spinlock.
But if there's indeed an access from interrupt contexts to these regs
it's already broken with the old code, so this can likely just be
reduced to a normal spinlock. Otoh the pageflip completion happens
from the vblank irq handler ...
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/radeon/r100.c | 13 ++++++++++++-
drivers/gpu/drm/radeon/radeon.h | 2 ++
drivers/gpu/drm/radeon/radeon_device.c | 1 +
3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index ae4c857..8ff7cac 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -4141,8 +4141,15 @@ uint32_t r100_mm_rreg(struct radeon_device *rdev, uint32_t reg,
if (reg < rdev->rmmio_size && !always_indirect)
return readl(((void __iomem *)rdev->rmmio) + reg);
else {
+ unsigned long flags;
+ uint32_t ret;
+
+ spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
writel(reg, ((void __iomem *)rdev->rmmio) + RADEON_MM_INDEX);
- return readl(((void __iomem *)rdev->rmmio) + RADEON_MM_DATA);
+ ret = readl(((void __iomem *)rdev->rmmio) + RADEON_MM_DATA);
+ spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
+
+ return ret;
}
}
@@ -4152,8 +4159,12 @@ void r100_mm_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v,
if (reg < rdev->rmmio_size && !always_indirect)
writel(v, ((void __iomem *)rdev->rmmio) + reg);
else {
+ unsigned long flags;
+
+ spin_lock_irqsave(&rdev->mmio_idx_lock, flags);
writel(reg, ((void __iomem *)rdev->rmmio) + RADEON_MM_INDEX);
writel(v, ((void __iomem *)rdev->rmmio) + RADEON_MM_DATA);
+ spin_unlock_irqrestore(&rdev->mmio_idx_lock, flags);
}
}
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index bcb00b8..3dedb39 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1539,6 +1539,8 @@ struct radeon_device {
/* Register mmio */
resource_size_t rmmio_base;
resource_size_t rmmio_size;
+ /* protects concurrent MM_INDEX/DATA based register access */
+ spinlock_t mmio_idx_lock;
void __iomem *rmmio;
radeon_rreg_t mc_rreg;
radeon_wreg_t mc_wreg;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index e2f5f88..49b0659 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1059,6 +1059,7 @@ int radeon_device_init(struct radeon_device *rdev,
/* Registers mapping */
/* TODO: block userspace mapping of io register */
+ spin_lock_init(&rdev->mmio_idx_lock);
rdev->rmmio_base = pci_resource_start(rdev->pdev, 2);
rdev->rmmio_size = pci_resource_len(rdev->pdev, 2);
rdev->rmmio = ioremap(rdev->rmmio_base, rdev->rmmio_size);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 13/37] drm/nouveau: protect evo_wait/evo_kick sections with a channel mutex
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (6 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 12/37] drm/radeon: make indirect register access concurrency-safe Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 14/37] drm: only take the crtc lock for ->cursor_set Daniel Vetter
` (19 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
With per-crtc locks modeset operations can run in parallel, and the
cursor code uses the device-global evo master channel for hw frobbing.
But the pageflip code can also sync with the master under some
circumstances. Hence just wrap things up in a mutex to ensure that
pushbuf access doesn't intermingle.
The approach here is a bit overkill since the per-crtc channels used
to schedule the pageflips could probably be used without this pushbuf
locking, but I'm not familiar enough with the nouveau codebase to be
sure of that.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/nouveau/nv50_display.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index 3587408..5751d63 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -128,6 +128,11 @@ struct nv50_dmac {
struct nv50_chan base;
dma_addr_t handle;
u32 *ptr;
+
+ /* Protects against concurrent pushbuf access to this channel, lock is
+ * grabbed by evo_wait (if the pushbuf reservation is successful) and
+ * dropped again by evo_kick. */
+ struct mutex lock;
};
static void
@@ -395,11 +400,13 @@ evo_wait(void *evoc, int nr)
struct nv50_dmac *dmac = evoc;
u32 put = nv_ro32(dmac->base.user, 0x0000) / 4;
+ mutex_lock(&dmac->lock);
if (put + nr >= (PAGE_SIZE / 4) - 8) {
dmac->ptr[put] = 0x20000000;
nv_wo32(dmac->base.user, 0x0000, 0x00000000);
if (!nv_wait(dmac->base.user, 0x0004, ~0, 0x00000000)) {
+ mutex_unlock(&dmac->lock);
NV_ERROR(dmac->base.user, "channel stalled\n");
return NULL;
}
@@ -415,6 +422,7 @@ evo_kick(u32 *push, void *evoc)
{
struct nv50_dmac *dmac = evoc;
nv_wo32(dmac->base.user, 0x0000, (push - dmac->ptr) << 2);
+ mutex_unlock(&dmac->lock);
}
#define evo_mthd(p,m,s) *((p)++) = (((s) << 18) | (m))
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 14/37] drm: only take the crtc lock for ->cursor_set
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (7 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 13/37] drm/nouveau: protect evo_wait/evo_kick sections with a channel mutex Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 15/37] drm: only take the crtc lock for ->cursor_move Daniel Vetter
` (18 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
First convert ->cursor_set to only take the crtc lock, since that
seems to be the function with the least amount of state - the core
ioctl function doesn't check anything which can change at runtime, so
we don't have any object lifetime issues to contend.
The only thing which is important is that the driver's implementation
doesn't touch any state outside of that single crtc which is not yet
properly protected by other locking:
- ast: access the global ast->cache_kmap. Luckily we only have on crtc
on this driver, so this is fine. Add a comment.
- gma500: calls gma_power_begin|and and psb_gtt_pin|unpin, both which
have their own locking to protect their state. Everything else is
crtc-local.
- i915: touches a bit of global gem state, all protected by the One
Lock to Rule Them All (dev->struct_mutex).
- nouveau: Pre-nv50 is all nice, nv50+ uses the evo channels to queue
up all display changes. And some of these channels are device
global. But this is fine now since the previous patch introduced an
evo channel mutex.
- radeon: Uses some indirect register access for cursor updates, but
with the previous patches to protect these indirect 2-register
access patterns with a spinlock, this should be fine now, too.
- vmwgfx: I have no idea how that works - update_cursor_position
doesn't take any per-crtc argument and I haven't figured out any
other place where this could be set in some form of a side-channel.
But vmwgfx definitely has more than one crtc (or at least can
register more than one), so I have no idea how this is supposed to
not fail with the current code already. Hence take the easy way out
and simply acquire all locks (which requires dropping the crtc lock
the core acquired for us). That way it's not worse off for
consistency than the old code.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/ast/ast_drv.h | 2 ++
drivers/gpu/drm/drm_crtc.c | 6 ++++--
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 32 ++++++++++++++++++++++++++------
3 files changed, 32 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 5ccf984..5284292 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -98,6 +98,8 @@ struct ast_private {
struct drm_gem_object *cursor_cache;
uint64_t cursor_cache_gpu_addr;
+ /* Acces to this cache is protected by the crtc->mutex of the only crtc
+ * we have. */
struct ttm_bo_kmap_obj cache_kmap;
int next_cursor;
};
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 91e8068..62b5002 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2023,7 +2023,6 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
return -EINVAL;
- drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
if (!obj) {
DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
@@ -2038,20 +2037,23 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
goto out;
}
/* Turns off the cursor if handle is 0 */
+ mutex_lock(&crtc->mutex);
ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
req->width, req->height);
+ mutex_unlock(&crtc->mutex);
}
if (req->flags & DRM_MODE_CURSOR_MOVE) {
if (crtc->funcs->cursor_move) {
+ drm_modeset_lock_all(dev);
ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
+ drm_modeset_unlock_all(dev);
} else {
ret = -EFAULT;
goto out;
}
}
out:
- drm_modeset_unlock_all(dev);
return ret;
}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 5474394..74b6734 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -180,16 +180,29 @@ int vmw_du_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
struct vmw_dma_buffer *dmabuf = NULL;
int ret;
+ /*
+ * FIXME: Unclear whether there's any global state touched by the
+ * cursor_set function, especially vmw_cursor_update_position looks
+ * suspicious. For now take the easy route and reacquire all locks. We
+ * can do this since the caller in the drm core doesn't check anything
+ * which is protected by any looks.
+ */
+ mutex_unlock(&crtc->mutex);
+ drm_modeset_lock_all(dev_priv->dev);
+
/* A lot of the code assumes this */
- if (handle && (width != 64 || height != 64))
- return -EINVAL;
+ if (handle && (width != 64 || height != 64)) {
+ ret = -EINVAL;
+ goto out;
+ }
if (handle) {
ret = vmw_user_lookup_handle(dev_priv, tfile,
handle, &surface, &dmabuf);
if (ret) {
DRM_ERROR("failed to find surface or dmabuf: %i\n", ret);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
}
@@ -197,7 +210,8 @@ int vmw_du_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
if (surface && !surface->snooper.image) {
DRM_ERROR("surface not suitable for cursor\n");
vmw_surface_unreference(&surface);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
/* takedown old cursor */
@@ -225,14 +239,20 @@ int vmw_du_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
du->hotspot_x, du->hotspot_y);
} else {
vmw_cursor_update_position(dev_priv, false, 0, 0);
- return 0;
+ ret = 0;
+ goto out;
}
vmw_cursor_update_position(dev_priv, true,
du->cursor_x + du->hotspot_x,
du->cursor_y + du->hotspot_y);
- return 0;
+ ret = 0;
+out:
+ drm_modeset_unlock_all(dev_priv->dev);
+ mutex_lock(&crtc->mutex);
+
+ return ret;
}
int vmw_du_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 15/37] drm: only take the crtc lock for ->cursor_move
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (8 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 14/37] drm: only take the crtc lock for ->cursor_set Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-13 11:03 ` [PATCH] " Daniel Vetter
2012-12-12 13:06 ` [PATCH 16/37] drm/<drivers>: reorder framebuffer init sequence Daniel Vetter
` (17 subsequent siblings)
27 siblings, 1 reply; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
->cursor_move uses mostly the same facilities in drivers as
->cursor_set, so pretty much nothing to fix up:
- ast/gma500/i915: They all use per-crtc registers to update the
cursor position. ast again touches the global cursor cache, but
that's ok since there's only one crtc.
- nouveau: nv50+ is again special, updates happen through the per-crtc
channel (without pushbufs), so it's not protected by the new evo
lock introduced earlier. But since this channel is per-crtc, we
should be fine anyway.
- radeon: A bit a mess: avivo asics need a workaround when both output
pipes are enabled, which means it'll access the crtc list. Just
reading that flag is ok though as long as radeon _always_ grabs all
locks when changing the crtc configuration. Which means with the
current scheme it cannot do an optimized modeset which only locks
the relevant crtcs. This can be fixed though by introducing a bit of
global state with separate locks and ensure in the modeset code that
the cursor will be updated appropriately when enabling the 2nd pipe
(on affected asics).
- vmwgfx: I still don't understand what it's doing exactly, so apply
the same trick for now.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 6 ++----
drivers/gpu/drm/radeon/radeon_cursor.c | 8 +++++++-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 13 +++++++++++++
3 files changed, 22 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 62b5002..3b2f25d 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2031,28 +2031,26 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
}
crtc = obj_to_crtc(obj);
+ mutex_lock(&crtc->mutex);
if (req->flags & DRM_MODE_CURSOR_BO) {
if (!crtc->funcs->cursor_set) {
ret = -ENXIO;
goto out;
}
/* Turns off the cursor if handle is 0 */
- mutex_lock(&crtc->mutex);
ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
req->width, req->height);
- mutex_unlock(&crtc->mutex);
}
if (req->flags & DRM_MODE_CURSOR_MOVE) {
if (crtc->funcs->cursor_move) {
- drm_modeset_lock_all(dev);
ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
- drm_modeset_unlock_all(dev);
} else {
ret = -EFAULT;
goto out;
}
}
+ mutex_unlock(&crtc->mutex);
out:
return ret;
}
diff --git a/drivers/gpu/drm/radeon/radeon_cursor.c b/drivers/gpu/drm/radeon/radeon_cursor.c
index ad6df62..c1680e6 100644
--- a/drivers/gpu/drm/radeon/radeon_cursor.c
+++ b/drivers/gpu/drm/radeon/radeon_cursor.c
@@ -245,8 +245,14 @@ int radeon_crtc_cursor_move(struct drm_crtc *crtc,
int i = 0;
struct drm_crtc *crtc_p;
- /* avivo cursor image can't end on 128 pixel boundary or
+ /*
+ * avivo cursor image can't end on 128 pixel boundary or
* go past the end of the frame if both crtcs are enabled
+ *
+ * NOTE: It is safe to access crtc->enabled of other crtcs
+ * without holding either the mode_config lock or the other
+ * crtc's lock as long as write access to this flag _always_
+ * grabs all locks.
*/
list_for_each_entry(crtc_p, &crtc->dev->mode_config.crtc_list, head) {
if (crtc_p->enabled)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 74b6734..385b8849 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -264,10 +264,23 @@ int vmw_du_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
du->cursor_x = x + crtc->x;
du->cursor_y = y + crtc->y;
+ /*
+ * FIXME: Unclear whether there's any global state touched by the
+ * cursor_set function, especially vmw_cursor_update_position looks
+ * suspicious. For now take the easy route and reacquire all locks. We
+ * can do this since the caller in the drm core doesn't check anything
+ * which is protected by any looks.
+ */
+ mutex_unlock(&crtc->mutex);
+ drm_modeset_lock_all(dev_priv->dev);
+
vmw_cursor_update_position(dev_priv, shown,
du->cursor_x + du->hotspot_x,
du->cursor_y + du->hotspot_y);
+ drm_modeset_unlock_all(dev_priv->dev);
+ mutex_lock(&crtc->mutex);
+
return 0;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH] drm: only take the crtc lock for ->cursor_move
2012-12-12 13:06 ` [PATCH 15/37] drm: only take the crtc lock for ->cursor_move Daniel Vetter
@ 2012-12-13 11:03 ` Daniel Vetter
0 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-13 11:03 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Daniel Vetter
->cursor_move uses mostly the same facilities in drivers as
->cursor_set, so pretty much nothing to fix up:
- ast/gma500/i915: They all use per-crtc registers to update the
cursor position. ast again touches the global cursor cache, but
that's ok since there's only one crtc.
- nouveau: nv50+ is again special, updates happen through the per-crtc
channel (without pushbufs), so it's not protected by the new evo
lock introduced earlier. But since this channel is per-crtc, we
should be fine anyway.
- radeon: A bit a mess: avivo asics need a workaround when both output
pipes are enabled, which means it'll access the crtc list. Just
reading that flag is ok though as long as radeon _always_ grabs all
locks when changing the crtc configuration. Which means with the
current scheme it cannot do an optimized modeset which only locks
the relevant crtcs. This can be fixed though by introducing a bit of
global state with separate locks and ensure in the modeset code that
the cursor will be updated appropriately when enabling the 2nd pipe
(on affected asics).
- vmwgfx: I still don't understand what it's doing exactly, so apply
the same trick for now.
v2: Fixup unlocking for the error cases, spotted by Richard Wilbur.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/drm_crtc.c | 7 +++----
drivers/gpu/drm/radeon/radeon_cursor.c | 8 +++++++-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 13 +++++++++++++
3 files changed, 23 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 62b5002..83de97f 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2031,29 +2031,28 @@ int drm_mode_cursor_ioctl(struct drm_device *dev,
}
crtc = obj_to_crtc(obj);
+ mutex_lock(&crtc->mutex);
if (req->flags & DRM_MODE_CURSOR_BO) {
if (!crtc->funcs->cursor_set) {
ret = -ENXIO;
goto out;
}
/* Turns off the cursor if handle is 0 */
- mutex_lock(&crtc->mutex);
ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
req->width, req->height);
- mutex_unlock(&crtc->mutex);
}
if (req->flags & DRM_MODE_CURSOR_MOVE) {
if (crtc->funcs->cursor_move) {
- drm_modeset_lock_all(dev);
ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
- drm_modeset_unlock_all(dev);
} else {
ret = -EFAULT;
goto out;
}
}
out:
+ mutex_unlock(&crtc->mutex);
+
return ret;
}
diff --git a/drivers/gpu/drm/radeon/radeon_cursor.c b/drivers/gpu/drm/radeon/radeon_cursor.c
index ad6df62..c1680e6 100644
--- a/drivers/gpu/drm/radeon/radeon_cursor.c
+++ b/drivers/gpu/drm/radeon/radeon_cursor.c
@@ -245,8 +245,14 @@ int radeon_crtc_cursor_move(struct drm_crtc *crtc,
int i = 0;
struct drm_crtc *crtc_p;
- /* avivo cursor image can't end on 128 pixel boundary or
+ /*
+ * avivo cursor image can't end on 128 pixel boundary or
* go past the end of the frame if both crtcs are enabled
+ *
+ * NOTE: It is safe to access crtc->enabled of other crtcs
+ * without holding either the mode_config lock or the other
+ * crtc's lock as long as write access to this flag _always_
+ * grabs all locks.
*/
list_for_each_entry(crtc_p, &crtc->dev->mode_config.crtc_list, head) {
if (crtc_p->enabled)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 74b6734..385b8849 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -264,10 +264,23 @@ int vmw_du_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
du->cursor_x = x + crtc->x;
du->cursor_y = y + crtc->y;
+ /*
+ * FIXME: Unclear whether there's any global state touched by the
+ * cursor_set function, especially vmw_cursor_update_position looks
+ * suspicious. For now take the easy route and reacquire all locks. We
+ * can do this since the caller in the drm core doesn't check anything
+ * which is protected by any looks.
+ */
+ mutex_unlock(&crtc->mutex);
+ drm_modeset_lock_all(dev_priv->dev);
+
vmw_cursor_update_position(dev_priv, shown,
du->cursor_x + du->hotspot_x,
du->cursor_y + du->hotspot_y);
+ drm_modeset_unlock_all(dev_priv->dev);
+ mutex_lock(&crtc->mutex);
+
return 0;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread
* [PATCH 16/37] drm/<drivers>: reorder framebuffer init sequence
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (9 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 15/37] drm: only take the crtc lock for ->cursor_move Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-13 11:05 ` [PATCH 1/2] " Daniel Vetter
2012-12-12 13:06 ` [PATCH 17/37] drm: revamp locking around fb creation/destruction Daniel Vetter
` (16 subsequent siblings)
27 siblings, 1 reply; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
With more fine-grained locking we can no longer rely on the big
mode_config lock to prevent concurrent access to mode resources
like framebuffers. Instead a framebuffer becomes accessible to
other threads as soon as it is added to the relevant lookup
structures. Hence it needs to be fully set up by the time drivers
call drm_framebuffer_init.
This patch here is the drivers part of that reorg. Nothing really fancy
going on safe for three special cases.
- exynos needs to be careful to properly unref all handles.
- nouveau gets a resource leak fixed for free: one of the error
cases didn't cleanup the framebuffer, which is now moot since
the framebuffer is only registered once it is fully set up.
- vmwgfx requires a slight reordering of operations, I'm hoping I didn't
break anything (but it's refcount management only, so should be safe).
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/ast/ast_main.c | 4 ++--
drivers/gpu/drm/cirrus/cirrus_main.c | 9 +++++++--
drivers/gpu/drm/drm_fb_cma_helper.c | 10 +++++-----
drivers/gpu/drm/exynos/exynos_drm_fb.c | 20 +++++++++++---------
drivers/gpu/drm/gma500/framebuffer.c | 4 ++--
drivers/gpu/drm/i915/intel_display.c | 5 +++--
drivers/gpu/drm/mgag200/mgag200_main.c | 8 +++++---
drivers/gpu/drm/nouveau/nouveau_display.c | 10 +++++-----
drivers/gpu/drm/radeon/radeon_display.c | 2 +-
drivers/gpu/drm/udl/udl_fb.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 28 ++++++++++++++--------------
drivers/staging/omapdrm/omap_fb.c | 16 ++++++++--------
12 files changed, 64 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index f668e6c..d5ba709 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -266,13 +266,13 @@ int ast_framebuffer_init(struct drm_device *dev,
{
int ret;
+ drm_helper_mode_fill_fb_struct(&ast_fb->base, mode_cmd);
+ ast_fb->obj = obj;
ret = drm_framebuffer_init(dev, &ast_fb->base, &ast_fb_funcs);
if (ret) {
DRM_ERROR("framebuffer init failed %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&ast_fb->base, mode_cmd);
- ast_fb->obj = obj;
return 0;
}
diff --git a/drivers/gpu/drm/cirrus/cirrus_main.c b/drivers/gpu/drm/cirrus/cirrus_main.c
index 6a9b12e..2eac87b 100644
--- a/drivers/gpu/drm/cirrus/cirrus_main.c
+++ b/drivers/gpu/drm/cirrus/cirrus_main.c
@@ -42,13 +42,13 @@ int cirrus_framebuffer_init(struct drm_device *dev,
{
int ret;
+ drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
+ gfb->obj = obj;
ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
- gfb->obj = obj;
return 0;
}
@@ -79,6 +79,11 @@ cirrus_user_framebuffer_create(struct drm_device *dev,
ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj);
if (ret) {
+ ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
+ if (ret) {
+ DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
+ return ret;
+ }
drm_gem_object_unreference_unlocked(obj);
kfree(cirrus_fb);
return ERR_PTR(ret);
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index fd9d0af..e1e0cb0 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -85,6 +85,11 @@ static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev,
if (!fb_cma)
return ERR_PTR(-ENOMEM);
+ drm_helper_mode_fill_fb_struct(&fb_cma->fb, mode_cmd);
+
+ for (i = 0; i < num_planes; i++)
+ fb_cma->obj[i] = obj[i];
+
ret = drm_framebuffer_init(dev, &fb_cma->fb, &drm_fb_cma_funcs);
if (ret) {
dev_err(dev->dev, "Failed to initalize framebuffer: %d\n", ret);
@@ -92,11 +97,6 @@ static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev,
return ERR_PTR(ret);
}
- drm_helper_mode_fill_fb_struct(&fb_cma->fb, mode_cmd);
-
- for (i = 0; i < num_planes; i++)
- fb_cma->obj[i] = obj[i];
-
return fb_cma;
}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index 4ef4cd3..179c177 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -136,15 +136,15 @@ exynos_drm_framebuffer_init(struct drm_device *dev,
return ERR_PTR(-ENOMEM);
}
+ drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
+ exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
+
ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
if (ret) {
DRM_ERROR("failed to initialize framebuffer\n");
return ERR_PTR(ret);
}
- drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
- exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
-
return &exynos_fb->fb;
}
@@ -202,12 +202,6 @@ exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
return ERR_PTR(-ENOENT);
}
- fb = exynos_drm_framebuffer_init(dev, mode_cmd, obj);
- if (IS_ERR(fb)) {
- drm_gem_object_unreference_unlocked(obj);
- return fb;
- }
-
exynos_fb = to_exynos_fb(fb);
exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
@@ -225,6 +219,14 @@ exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj);
}
+ fb = exynos_drm_framebuffer_init(dev, mode_cmd, obj);
+ if (IS_ERR(fb)) {
+ for (i = 0; i < exynos_fb->buf_cnt; i++)
+ drm_gem_object_unreference_unlocked(&exynos_fb->exynos_gem_obj[i]->base);
+
+ return fb;
+ }
+
return fb;
}
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index afded54..38e7e75 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -260,13 +260,13 @@ static int psb_framebuffer_init(struct drm_device *dev,
default:
return -EINVAL;
}
+ drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
+ fb->gtt = gt;
ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
if (ret) {
dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
- fb->gtt = gt;
return 0;
}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a0d8869..65f5362 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8311,14 +8311,15 @@ int intel_framebuffer_init(struct drm_device *dev,
if (mode_cmd->offsets[0] != 0)
return -EINVAL;
+ drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
+ intel_fb->obj = obj;
+
ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
if (ret) {
DRM_ERROR("framebuffer init failed %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
- intel_fb->obj = obj;
return 0;
}
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c
index 70dd3c5..266438a 100644
--- a/drivers/gpu/drm/mgag200/mgag200_main.c
+++ b/drivers/gpu/drm/mgag200/mgag200_main.c
@@ -40,13 +40,15 @@ int mgag200_framebuffer_init(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj)
{
- int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
+ int ret;
+
+ drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
+ gfb->obj = obj;
+ ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
- gfb->obj = obj;
return 0;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index e4188f2..2591ff2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -78,11 +78,6 @@ nouveau_framebuffer_init(struct drm_device *dev,
struct drm_framebuffer *fb = &nv_fb->base;
int ret;
- ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
- if (ret) {
- return ret;
- }
-
drm_helper_mode_fill_fb_struct(fb, mode_cmd);
nv_fb->nvbo = nvbo;
@@ -125,6 +120,11 @@ nouveau_framebuffer_init(struct drm_device *dev,
}
}
+ ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
+ if (ret) {
+ return ret;
+ }
+
return 0;
}
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index bfa2a60..8724196 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1080,12 +1080,12 @@ radeon_framebuffer_init(struct drm_device *dev,
{
int ret;
rfb->obj = obj;
+ drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
ret = drm_framebuffer_init(dev, &rfb->base, &radeon_fb_funcs);
if (ret) {
rfb->obj = NULL;
return ret;
}
- drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
return 0;
}
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index d4ab3be..829c4a7 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -435,8 +435,8 @@ udl_framebuffer_init(struct drm_device *dev,
int ret;
ufb->obj = obj;
- ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
drm_helper_mode_fill_fb_struct(&ufb->base, mode_cmd);
+ ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
return ret;
}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 385b8849..d2e2d49 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -714,14 +714,9 @@ static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
goto out_err1;
}
- ret = drm_framebuffer_init(dev, &vfbs->base.base,
- &vmw_framebuffer_surface_funcs);
- if (ret)
- goto out_err2;
-
if (!vmw_surface_reference(surface)) {
DRM_ERROR("failed to reference surface %p\n", surface);
- goto out_err3;
+ goto out_err2;
}
/* XXX get the first 3 from the surface info */
@@ -740,10 +735,15 @@ static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
*out = &vfbs->base;
+ ret = drm_framebuffer_init(dev, &vfbs->base.base,
+ &vmw_framebuffer_surface_funcs);
+ if (ret)
+ goto out_err3;
+
return 0;
out_err3:
- drm_framebuffer_cleanup(&vfbs->base.base);
+ vmw_surface_unreference(&surface);
out_err2:
kfree(vfbs);
out_err1:
@@ -1086,14 +1086,9 @@ static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
goto out_err1;
}
- ret = drm_framebuffer_init(dev, &vfbd->base.base,
- &vmw_framebuffer_dmabuf_funcs);
- if (ret)
- goto out_err2;
-
if (!vmw_dmabuf_reference(dmabuf)) {
DRM_ERROR("failed to reference dmabuf %p\n", dmabuf);
- goto out_err3;
+ goto out_err2;
}
vfbd->base.base.bits_per_pixel = mode_cmd->bpp;
@@ -1110,10 +1105,15 @@ static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
vfbd->base.user_handle = mode_cmd->handle;
*out = &vfbd->base;
+ ret = drm_framebuffer_init(dev, &vfbd->base.base,
+ &vmw_framebuffer_dmabuf_funcs);
+ if (ret)
+ goto out_err3;
+
return 0;
out_err3:
- drm_framebuffer_cleanup(&vfbd->base.base);
+ vmw_dmabuf_unreference(&dmabuf);
out_err2:
kfree(vfbd);
out_err1:
diff --git a/drivers/staging/omapdrm/omap_fb.c b/drivers/staging/omapdrm/omap_fb.c
index 446801d..5090547 100644
--- a/drivers/staging/omapdrm/omap_fb.c
+++ b/drivers/staging/omapdrm/omap_fb.c
@@ -425,14 +425,6 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
}
fb = &omap_fb->base;
- ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
- if (ret) {
- dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
- goto fail;
- }
-
- DBG("create: FB ID: %d (%p)", fb->base.id, fb);
-
omap_fb->format = format;
for (i = 0; i < n; i++) {
@@ -463,6 +455,14 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
drm_helper_mode_fill_fb_struct(fb, mode_cmd);
+ ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
+ if (ret) {
+ dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
+ goto fail;
+ }
+
+ DBG("create: FB ID: %d (%p)", fb->base.id, fb);
+
return fb;
fail:
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 1/2] drm/<drivers>: reorder framebuffer init sequence
2012-12-12 13:06 ` [PATCH 16/37] drm/<drivers>: reorder framebuffer init sequence Daniel Vetter
@ 2012-12-13 11:05 ` Daniel Vetter
[not found] ` <1355396719-25286-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
0 siblings, 1 reply; 59+ messages in thread
From: Daniel Vetter @ 2012-12-13 11:05 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Daniel Vetter
With more fine-grained locking we can no longer rely on the big
mode_config lock to prevent concurrent access to mode resources
like framebuffers. Instead a framebuffer becomes accessible to
other threads as soon as it is added to the relevant lookup
structures. Hence it needs to be fully set up by the time drivers
call drm_framebuffer_init.
This patch here is the drivers part of that reorg. Nothing really fancy
going on safe for three special cases.
- exynos needs to be careful to properly unref all handles.
- nouveau gets a resource leak fixed for free: one of the error
cases didn't cleanup the framebuffer, which is now moot since
the framebuffer is only registered once it is fully set up.
- vmwgfx requires a slight reordering of operations, I'm hoping I didn't
break anything (but it's refcount management only, so should be safe).
v2: Split out exynos, since it's a bit more hairy than expected.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/ast/ast_main.c | 4 ++--
drivers/gpu/drm/cirrus/cirrus_main.c | 9 +++++++--
drivers/gpu/drm/drm_fb_cma_helper.c | 10 +++++-----
drivers/gpu/drm/gma500/framebuffer.c | 4 ++--
drivers/gpu/drm/i915/intel_display.c | 5 +++--
drivers/gpu/drm/mgag200/mgag200_main.c | 8 +++++---
drivers/gpu/drm/nouveau/nouveau_display.c | 10 +++++-----
drivers/gpu/drm/radeon/radeon_display.c | 2 +-
drivers/gpu/drm/udl/udl_fb.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 28 ++++++++++++++--------------
drivers/staging/omapdrm/omap_fb.c | 16 ++++++++--------
11 files changed, 53 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index f668e6c..d5ba709 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -266,13 +266,13 @@ int ast_framebuffer_init(struct drm_device *dev,
{
int ret;
+ drm_helper_mode_fill_fb_struct(&ast_fb->base, mode_cmd);
+ ast_fb->obj = obj;
ret = drm_framebuffer_init(dev, &ast_fb->base, &ast_fb_funcs);
if (ret) {
DRM_ERROR("framebuffer init failed %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&ast_fb->base, mode_cmd);
- ast_fb->obj = obj;
return 0;
}
diff --git a/drivers/gpu/drm/cirrus/cirrus_main.c b/drivers/gpu/drm/cirrus/cirrus_main.c
index 6a9b12e..2eac87b 100644
--- a/drivers/gpu/drm/cirrus/cirrus_main.c
+++ b/drivers/gpu/drm/cirrus/cirrus_main.c
@@ -42,13 +42,13 @@ int cirrus_framebuffer_init(struct drm_device *dev,
{
int ret;
+ drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
+ gfb->obj = obj;
ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
- gfb->obj = obj;
return 0;
}
@@ -79,6 +79,11 @@ cirrus_user_framebuffer_create(struct drm_device *dev,
ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj);
if (ret) {
+ ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
+ if (ret) {
+ DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
+ return ret;
+ }
drm_gem_object_unreference_unlocked(obj);
kfree(cirrus_fb);
return ERR_PTR(ret);
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index fd9d0af..e1e0cb0 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -85,6 +85,11 @@ static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev,
if (!fb_cma)
return ERR_PTR(-ENOMEM);
+ drm_helper_mode_fill_fb_struct(&fb_cma->fb, mode_cmd);
+
+ for (i = 0; i < num_planes; i++)
+ fb_cma->obj[i] = obj[i];
+
ret = drm_framebuffer_init(dev, &fb_cma->fb, &drm_fb_cma_funcs);
if (ret) {
dev_err(dev->dev, "Failed to initalize framebuffer: %d\n", ret);
@@ -92,11 +97,6 @@ static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev,
return ERR_PTR(ret);
}
- drm_helper_mode_fill_fb_struct(&fb_cma->fb, mode_cmd);
-
- for (i = 0; i < num_planes; i++)
- fb_cma->obj[i] = obj[i];
-
return fb_cma;
}
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index afded54..38e7e75 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -260,13 +260,13 @@ static int psb_framebuffer_init(struct drm_device *dev,
default:
return -EINVAL;
}
+ drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
+ fb->gtt = gt;
ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
if (ret) {
dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
- fb->gtt = gt;
return 0;
}
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a0d8869..65f5362 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8311,14 +8311,15 @@ int intel_framebuffer_init(struct drm_device *dev,
if (mode_cmd->offsets[0] != 0)
return -EINVAL;
+ drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
+ intel_fb->obj = obj;
+
ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
if (ret) {
DRM_ERROR("framebuffer init failed %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
- intel_fb->obj = obj;
return 0;
}
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c
index 70dd3c5..266438a 100644
--- a/drivers/gpu/drm/mgag200/mgag200_main.c
+++ b/drivers/gpu/drm/mgag200/mgag200_main.c
@@ -40,13 +40,15 @@ int mgag200_framebuffer_init(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj)
{
- int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
+ int ret;
+
+ drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
+ gfb->obj = obj;
+ ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
return ret;
}
- drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
- gfb->obj = obj;
return 0;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index e4188f2..2591ff2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -78,11 +78,6 @@ nouveau_framebuffer_init(struct drm_device *dev,
struct drm_framebuffer *fb = &nv_fb->base;
int ret;
- ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
- if (ret) {
- return ret;
- }
-
drm_helper_mode_fill_fb_struct(fb, mode_cmd);
nv_fb->nvbo = nvbo;
@@ -125,6 +120,11 @@ nouveau_framebuffer_init(struct drm_device *dev,
}
}
+ ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
+ if (ret) {
+ return ret;
+ }
+
return 0;
}
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index bfa2a60..8724196 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1080,12 +1080,12 @@ radeon_framebuffer_init(struct drm_device *dev,
{
int ret;
rfb->obj = obj;
+ drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
ret = drm_framebuffer_init(dev, &rfb->base, &radeon_fb_funcs);
if (ret) {
rfb->obj = NULL;
return ret;
}
- drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
return 0;
}
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index d4ab3be..829c4a7 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -435,8 +435,8 @@ udl_framebuffer_init(struct drm_device *dev,
int ret;
ufb->obj = obj;
- ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
drm_helper_mode_fill_fb_struct(&ufb->base, mode_cmd);
+ ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
return ret;
}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 385b8849..d2e2d49 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -714,14 +714,9 @@ static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
goto out_err1;
}
- ret = drm_framebuffer_init(dev, &vfbs->base.base,
- &vmw_framebuffer_surface_funcs);
- if (ret)
- goto out_err2;
-
if (!vmw_surface_reference(surface)) {
DRM_ERROR("failed to reference surface %p\n", surface);
- goto out_err3;
+ goto out_err2;
}
/* XXX get the first 3 from the surface info */
@@ -740,10 +735,15 @@ static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
*out = &vfbs->base;
+ ret = drm_framebuffer_init(dev, &vfbs->base.base,
+ &vmw_framebuffer_surface_funcs);
+ if (ret)
+ goto out_err3;
+
return 0;
out_err3:
- drm_framebuffer_cleanup(&vfbs->base.base);
+ vmw_surface_unreference(&surface);
out_err2:
kfree(vfbs);
out_err1:
@@ -1086,14 +1086,9 @@ static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
goto out_err1;
}
- ret = drm_framebuffer_init(dev, &vfbd->base.base,
- &vmw_framebuffer_dmabuf_funcs);
- if (ret)
- goto out_err2;
-
if (!vmw_dmabuf_reference(dmabuf)) {
DRM_ERROR("failed to reference dmabuf %p\n", dmabuf);
- goto out_err3;
+ goto out_err2;
}
vfbd->base.base.bits_per_pixel = mode_cmd->bpp;
@@ -1110,10 +1105,15 @@ static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
vfbd->base.user_handle = mode_cmd->handle;
*out = &vfbd->base;
+ ret = drm_framebuffer_init(dev, &vfbd->base.base,
+ &vmw_framebuffer_dmabuf_funcs);
+ if (ret)
+ goto out_err3;
+
return 0;
out_err3:
- drm_framebuffer_cleanup(&vfbd->base.base);
+ vmw_dmabuf_unreference(&dmabuf);
out_err2:
kfree(vfbd);
out_err1:
diff --git a/drivers/staging/omapdrm/omap_fb.c b/drivers/staging/omapdrm/omap_fb.c
index 446801d..5090547 100644
--- a/drivers/staging/omapdrm/omap_fb.c
+++ b/drivers/staging/omapdrm/omap_fb.c
@@ -425,14 +425,6 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
}
fb = &omap_fb->base;
- ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
- if (ret) {
- dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
- goto fail;
- }
-
- DBG("create: FB ID: %d (%p)", fb->base.id, fb);
-
omap_fb->format = format;
for (i = 0; i < n; i++) {
@@ -463,6 +455,14 @@ struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
drm_helper_mode_fill_fb_struct(fb, mode_cmd);
+ ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
+ if (ret) {
+ dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
+ goto fail;
+ }
+
+ DBG("create: FB ID: %d (%p)", fb->base.id, fb);
+
return fb;
fail:
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread
* [PATCH 17/37] drm: revamp locking around fb creation/destruction
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (10 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 16/37] drm/<drivers>: reorder framebuffer init sequence Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 18/37] drm: create drm_framebuffer_lookup Daniel Vetter
` (15 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
Well, at least step 1. The goal here is that framebuffer objects can
survive outside of the mode_config lock, with just a reference held
as protection. The first step to get there is to introduce a special
fb_lock which protects fb lookup, creation and destruction, to make
them appear atomic.
This new fb_lock can nest within the mode_config lock. But the idea is
(once the reference counting part is completed) that we only quickly
take that fb_lock to lookup a framebuffer and grab a reference,
without any other locks involved.
vmwgfx is the only driver which does framebuffer lookups itself, also
wrap those calls to drm_mode_object_find with the new lock.
Also protect the fb_list walking in i915 and omapdrm with the new lock.
As a slight complication there's also the list of user-created fbs
attached to the file private. The problem now is that at fclose() time
we need to walk that list, eventually do a modeset call to remove the
fb from active usage (and are required to be able to take the
mode_config lock), but in the end we need to grab the new fb_lock to
remove the fb from the list. The easiest solution is to add another
mutex to protect this per-file list.
Currently that new fbs_lock nests within the modeset locks and so
appears redudant. But later patches will switch around this sequence
so that taking the modeset locks in the fb destruction path is
optional in the fastpath. Ultimately the goal is that addfb and rmfb
do not require the mode_config lock, since otherwise they have the
potential to introduce stalls in the pageflip sequence of a compositor
(if the compositor e.g. switches to a fullscreen client or if it
enables a plane). But that requires a few more steps and hoops to jump
through.
Note that framebuffer creation/destruction is now double-protected -
once by the fb_lock and in parts by the idr_lock. The later would be
unnecessariy if framebuffers would have their own idr allocator. But
that's material for another patch (series).
v2: Properly initialize the fb->filp_head list in _init, otherwise the
newly added WARN to check whether the fb isn't on a fpriv list any
more will fail for driver-private objects.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 113 ++++++++++++++++++++++----------
drivers/gpu/drm/drm_fops.c | 1 +
drivers/gpu/drm/i915/i915_debugfs.c | 5 +-
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c | 4 ++
drivers/staging/omapdrm/omap_debugfs.c | 2 +
include/drm/drmP.h | 8 +++
include/drm/drm_crtc.h | 14 ++++
7 files changed, 111 insertions(+), 36 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 3b2f25d..5a46ea1 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -262,15 +262,21 @@ again:
mutex_lock(&dev->mode_config.idr_mutex);
ret = idr_get_new_above(&dev->mode_config.crtc_idr, obj, 1, &new_id);
+
+ if (!ret) {
+ /*
+ * Set up the object linking under the protection of the idr
+ * lock so that other users can't see inconsistent state.
+ */
+ obj->id = new_id;
+ obj->type = obj_type;
+ }
mutex_unlock(&dev->mode_config.idr_mutex);
+
if (ret == -EAGAIN)
goto again;
- else if (ret)
- return ret;
- obj->id = new_id;
- obj->type = obj_type;
- return 0;
+ return ret;
}
/**
@@ -312,6 +318,12 @@ EXPORT_SYMBOL(drm_mode_object_find);
* Allocates an ID for the framebuffer's parent mode object, sets its mode
* functions & device file and adds it to the master fd list.
*
+ * IMPORTANT:
+ * This functions publishes the fb and makes it available for concurrent access
+ * by other users. Which means by this point the fb _must_ be fully set up -
+ * since all the fb attributes are invariant over its lifetime, no further
+ * locking but only correct reference counting is required.
+ *
* RETURNS:
* Zero on success, error code on failure.
*/
@@ -320,16 +332,19 @@ int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
{
int ret;
+ mutex_lock(&dev->mode_config.fb_lock);
kref_init(&fb->refcount);
+ INIT_LIST_HEAD(&fb->filp_head);
+ fb->dev = dev;
+ fb->funcs = funcs;
ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
if (ret)
return ret;
- fb->dev = dev;
- fb->funcs = funcs;
dev->mode_config.num_fb++;
list_add(&fb->head, &dev->mode_config.fb_list);
+ mutex_unlock(&dev->mode_config.fb_lock);
return 0;
}
@@ -387,8 +402,10 @@ void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
* this.)
*/
drm_mode_object_put(dev, &fb->base);
+ mutex_lock(&dev->mode_config.fb_lock);
list_del(&fb->head);
dev->mode_config.num_fb--;
+ mutex_unlock(&dev->mode_config.fb_lock);
}
EXPORT_SYMBOL(drm_framebuffer_cleanup);
@@ -408,6 +425,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
int ret;
WARN_ON(!drm_modeset_is_locked(dev));
+ WARN_ON(!list_empty(&fb->filp_head));
/* remove from any CRTC */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@@ -434,8 +452,6 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
}
}
- list_del(&fb->filp_head);
-
drm_framebuffer_unreference(fb);
}
EXPORT_SYMBOL(drm_framebuffer_remove);
@@ -991,6 +1007,7 @@ void drm_mode_config_init(struct drm_device *dev)
{
mutex_init(&dev->mode_config.mutex);
mutex_init(&dev->mode_config.idr_mutex);
+ mutex_init(&dev->mode_config.fb_lock);
INIT_LIST_HEAD(&dev->mode_config.fb_list);
INIT_LIST_HEAD(&dev->mode_config.crtc_list);
INIT_LIST_HEAD(&dev->mode_config.connector_list);
@@ -1093,6 +1110,9 @@ void drm_mode_config_cleanup(struct drm_device *dev)
drm_property_destroy(dev, property);
}
+ /* Single-threaded teardown context, so it's not requied to grab the
+ * fb_lock to protect against concurrent fb_list access. Contrary, it
+ * would actually deadlock with the drm_framebuffer_cleanup function. */
list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
drm_framebuffer_remove(fb);
}
@@ -1222,8 +1242,8 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- drm_modeset_lock_all(dev);
+ mutex_lock(&file_priv->fbs_lock);
/*
* For the non-control nodes we need to limit the list of resources
* by IDs in the group list for this node
@@ -1231,6 +1251,23 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
list_for_each(lh, &file_priv->fbs)
fb_count++;
+ /* handle this in 4 parts */
+ /* FBs */
+ if (card_res->count_fbs >= fb_count) {
+ copied = 0;
+ fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
+ list_for_each_entry(fb, &file_priv->fbs, filp_head) {
+ if (put_user(fb->base.id, fb_id + copied)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ copied++;
+ }
+ }
+ card_res->count_fbs = fb_count;
+ mutex_unlock(&file_priv->fbs_lock);
+
+ drm_modeset_lock_all(dev);
mode_group = &file_priv->master->minor->mode_group;
if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
@@ -1254,21 +1291,6 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
card_res->max_width = dev->mode_config.max_width;
card_res->min_width = dev->mode_config.min_width;
- /* handle this in 4 parts */
- /* FBs */
- if (card_res->count_fbs >= fb_count) {
- copied = 0;
- fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
- list_for_each_entry(fb, &file_priv->fbs, filp_head) {
- if (put_user(fb->base.id, fb_id + copied)) {
- ret = -EFAULT;
- goto out;
- }
- copied++;
- }
- }
- card_res->count_fbs = fb_count;
-
/* CRTCs */
if (card_res->count_crtcs >= crtc_count) {
copied = 0;
@@ -1767,8 +1789,10 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
}
crtc = obj_to_crtc(obj);
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, plane_req->fb_id,
DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj) {
DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
plane_req->fb_id);
@@ -1895,8 +1919,10 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
}
fb = crtc->fb;
} else {
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, crtc_req->fb_id,
DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj) {
DRM_DEBUG_KMS("Unknown FB ID%d\n",
crtc_req->fb_id);
@@ -2138,16 +2164,17 @@ int drm_mode_addfb(struct drm_device *dev,
fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
if (IS_ERR(fb)) {
DRM_DEBUG_KMS("could not create framebuffer\n");
- ret = PTR_ERR(fb);
- goto out;
+ drm_modeset_unlock_all(dev);
+ return PTR_ERR(fb);
}
+ mutex_lock(&file_priv->fbs_lock);
or->fb_id = fb->base.id;
list_add(&fb->filp_head, &file_priv->fbs);
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
-
-out:
+ mutex_unlock(&file_priv->fbs_lock);
drm_modeset_unlock_all(dev);
+
return ret;
}
@@ -2320,16 +2347,18 @@ int drm_mode_addfb2(struct drm_device *dev,
fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
if (IS_ERR(fb)) {
DRM_DEBUG_KMS("could not create framebuffer\n");
- ret = PTR_ERR(fb);
- goto out;
+ drm_modeset_unlock_all(dev);
+ return PTR_ERR(fb);
}
+ mutex_lock(&file_priv->fbs_lock);
r->fb_id = fb->base.id;
list_add(&fb->filp_head, &file_priv->fbs);
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
+ mutex_unlock(&file_priv->fbs_lock);
-out:
drm_modeset_unlock_all(dev);
+
return ret;
}
@@ -2360,27 +2389,34 @@ int drm_mode_rmfb(struct drm_device *dev,
return -EINVAL;
drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, *id, DRM_MODE_OBJECT_FB);
/* TODO check that we really get a framebuffer back. */
if (!obj) {
+ mutex_unlock(&dev->mode_config.fb_lock);
ret = -EINVAL;
goto out;
}
fb = obj_to_fb(obj);
+ mutex_unlock(&dev->mode_config.fb_lock);
+ mutex_lock(&file_priv->fbs_lock);
list_for_each_entry(fbl, &file_priv->fbs, filp_head)
if (fb == fbl)
found = 1;
-
if (!found) {
ret = -EINVAL;
+ mutex_unlock(&file_priv->fbs_lock);
goto out;
}
- drm_framebuffer_remove(fb);
+ list_del_init(&fb->filp_head);
+ mutex_unlock(&file_priv->fbs_lock);
+ drm_framebuffer_remove(fb);
out:
drm_modeset_unlock_all(dev);
+
return ret;
}
@@ -2409,7 +2445,9 @@ int drm_mode_getfb(struct drm_device *dev,
return -EINVAL;
drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj) {
ret = -EINVAL;
goto out;
@@ -2444,7 +2482,9 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
return -EINVAL;
drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj) {
ret = -EINVAL;
goto out_err1;
@@ -2519,9 +2559,12 @@ void drm_fb_release(struct drm_file *priv)
struct drm_framebuffer *fb, *tfb;
drm_modeset_lock_all(dev);
+ mutex_lock(&priv->fbs_lock);
list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
+ list_del_init(&fb->filp_head);
drm_framebuffer_remove(fb);
}
+ mutex_unlock(&priv->fbs_lock);
drm_modeset_unlock_all(dev);
}
@@ -3547,7 +3590,9 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
if (crtc->funcs->page_flip == NULL)
goto out;
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, page_flip->fb_id, DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj)
goto out;
fb = obj_to_fb(obj);
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 7ef1b67..e06c492 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -260,6 +260,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
INIT_LIST_HEAD(&priv->lhead);
INIT_LIST_HEAD(&priv->fbs);
+ mutex_init(&priv->fbs_lock);
INIT_LIST_HEAD(&priv->event_list);
init_waitqueue_head(&priv->event_wait);
priv->event_space = 4096; /* set aside 4k for event buffer */
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 35d2ace..da1c8b6 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1376,7 +1376,9 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
fb->base.bits_per_pixel);
describe_obj(m, fb->obj);
seq_printf(m, "\n");
+ mutex_unlock(&dev->mode_config.mutex);
+ mutex_lock(&dev->mode_config.fb_lock);
list_for_each_entry(fb, &dev->mode_config.fb_list, base.head) {
if (&fb->base == ifbdev->helper.fb)
continue;
@@ -1389,8 +1391,7 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
describe_obj(m, fb->obj);
seq_printf(m, "\n");
}
-
- mutex_unlock(&dev->mode_config.mutex);
+ mutex_unlock(&dev->mode_config.fb_lock);
return 0;
}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
index 13e4371..84c2c44 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
@@ -163,7 +163,9 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj) {
DRM_ERROR("Invalid framebuffer id.\n");
ret = -EINVAL;
@@ -246,7 +248,9 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.fb_lock);
obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
+ mutex_unlock(&dev->mode_config.fb_lock);
if (!obj) {
DRM_ERROR("Invalid framebuffer id.\n");
ret = -EINVAL;
diff --git a/drivers/staging/omapdrm/omap_debugfs.c b/drivers/staging/omapdrm/omap_debugfs.c
index 2f122e0..e95540b 100644
--- a/drivers/staging/omapdrm/omap_debugfs.c
+++ b/drivers/staging/omapdrm/omap_debugfs.c
@@ -72,6 +72,7 @@ static int fb_show(struct seq_file *m, void *arg)
seq_printf(m, "fbcon ");
omap_framebuffer_describe(priv->fbdev->fb, m);
+ mutex_lock(&dev->mode_config.fb_lock);
list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
if (fb == priv->fbdev->fb)
continue;
@@ -79,6 +80,7 @@ static int fb_show(struct seq_file *m, void *arg)
seq_printf(m, "user ");
omap_framebuffer_describe(fb, m);
}
+ mutex_unlock(&dev->mode_config.fb_lock);
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->mode_config.mutex);
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 3c609ab..e74731c 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -446,7 +446,15 @@ struct drm_file {
int is_master; /* this file private is a master for a minor */
struct drm_master *master; /* master this node is currently associated with
N.B. not always minor->master */
+
+ /**
+ * fbs - List of framebuffers associated with this file.
+ *
+ * Protected by fbs_lock. Note that the fbs list holds a reference on
+ * the fb object to prevent it from untimely disappearing.
+ */
struct list_head fbs;
+ struct mutex fbs_lock;
wait_queue_head_t event_wait;
struct list_head event_list;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index f1296ce..334765a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -254,6 +254,10 @@ struct drm_framebuffer {
* userspace perspective.
*/
struct kref refcount;
+ /*
+ * Place on the dev->mode_config.fb_list, access protected by
+ * dev->mode_config.fb_lock.
+ */
struct list_head head;
struct drm_mode_object base;
const struct drm_framebuffer_funcs *funcs;
@@ -780,8 +784,18 @@ struct drm_mode_config {
struct mutex idr_mutex; /* for IDR management */
struct idr crtc_idr; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */
/* this is limited to one for now */
+
+
+ /**
+ * fb_lock - mutex to protect fb state
+ *
+ * Besides the global fb list his also protects the fbs list in the
+ * file_priv
+ */
+ struct mutex fb_lock;
int num_fb;
struct list_head fb_list;
+
int num_connector;
struct list_head connector_list;
int num_encoder;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 18/37] drm: create drm_framebuffer_lookup
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (11 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 17/37] drm: revamp locking around fb creation/destruction Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:06 ` [PATCH 19/37] drm/gma500: move fbcon restore to lastclose Daniel Vetter
` (14 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
And replace all fb lookups with it. Also add a WARN to
drm_mode_object_find since that is now no longer the blessed interface
to look up an fb. And add kerneldoc to both functions.
This only updates all callsites, but immediately drops the acquired
refence again. Hence all callers still rely on the fact that a mode fb
can't disappear while they're holding the struct mutex. Subsequent
patches will instate proper use of refcounts, and then rework the rmfb
and unref code to no longer serialize fb destruction with the
mode_config lock. We don't want that since otherwise a compositor
might end up stalling for a few frames in rmfb.
v2: Don't use kreg_get_unless_zero - Greg KH doesn't like that kind of
interface.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 109 ++++++++++++++++++++++-----------
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c | 24 ++++----
include/drm/drm_crtc.h | 2 +
3 files changed, 86 insertions(+), 49 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 5a46ea1..75ffc3b 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -294,11 +294,24 @@ static void drm_mode_object_put(struct drm_device *dev,
mutex_unlock(&dev->mode_config.idr_mutex);
}
+/**
+ * drm_mode_object_find - look up a drm object with static lifetime
+ * @dev: drm device
+ * @id: id of the mode object
+ * @type: type of the mode object
+ *
+ * Note that framebuffers cannot be looked up with this functions - since those
+ * are reference counted, they need special treatment.
+ */
struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
uint32_t id, uint32_t type)
{
struct drm_mode_object *obj = NULL;
+ /* Framebuffers are reference counted and need their own lookup
+ * function.*/
+ WARN_ON(type == DRM_MODE_OBJECT_FB);
+
mutex_lock(&dev->mode_config.idr_mutex);
obj = idr_find(&dev->mode_config.crtc_idr, id);
if (!obj || (obj->type != type) || (obj->id != id))
@@ -358,6 +371,40 @@ static void drm_framebuffer_free(struct kref *kref)
}
/**
+ * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
+ * @dev: drm device
+ * @id: id of the fb object
+ *
+ * If successful, this grabs an additional reference to the framebuffer -
+ * callers need to make sure to eventually unreference the returned framebuffer
+ * again.
+ */
+struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
+ uint32_t id)
+{
+ struct drm_mode_object *obj = NULL;
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ obj = idr_find(&dev->mode_config.crtc_idr, id);
+ if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
+ fb = NULL;
+ else
+ fb = obj_to_fb(obj);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ if (fb)
+ kref_get(&fb->refcount);
+
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ return fb;
+}
+EXPORT_SYMBOL(drm_framebuffer_lookup);
+
+/**
* drm_framebuffer_unreference - unref a framebuffer
* @fb: framebuffer to unref
*
@@ -1789,17 +1836,15 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
}
crtc = obj_to_crtc(obj);
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, plane_req->fb_id,
- DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj) {
+ fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
+ if (!fb) {
DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
plane_req->fb_id);
ret = -ENOENT;
goto out;
}
- fb = obj_to_fb(obj);
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
/* Check whether this plane supports the fb pixel format. */
for (i = 0; i < plane->format_count; i++)
@@ -1919,17 +1964,16 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
}
fb = crtc->fb;
} else {
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, crtc_req->fb_id,
- DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj) {
+ fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
+ if (!fb) {
DRM_DEBUG_KMS("Unknown FB ID%d\n",
crtc_req->fb_id);
ret = -EINVAL;
goto out;
}
- fb = obj_to_fb(obj);
+ /* fb is protect by the mode_config lock, so drop the
+ * ref immediately */
+ drm_framebuffer_unreference(fb);
}
mode = drm_mode_create(dev);
@@ -2378,7 +2422,6 @@ int drm_mode_addfb2(struct drm_device *dev,
int drm_mode_rmfb(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
- struct drm_mode_object *obj;
struct drm_framebuffer *fb = NULL;
struct drm_framebuffer *fbl = NULL;
uint32_t *id = data;
@@ -2389,16 +2432,13 @@ int drm_mode_rmfb(struct drm_device *dev,
return -EINVAL;
drm_modeset_lock_all(dev);
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, *id, DRM_MODE_OBJECT_FB);
- /* TODO check that we really get a framebuffer back. */
- if (!obj) {
- mutex_unlock(&dev->mode_config.fb_lock);
+ fb = drm_framebuffer_lookup(dev, *id);
+ if (!fb) {
ret = -EINVAL;
goto out;
}
- fb = obj_to_fb(obj);
- mutex_unlock(&dev->mode_config.fb_lock);
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
mutex_lock(&file_priv->fbs_lock);
list_for_each_entry(fbl, &file_priv->fbs, filp_head)
@@ -2437,7 +2477,6 @@ int drm_mode_getfb(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_fb_cmd *r = data;
- struct drm_mode_object *obj;
struct drm_framebuffer *fb;
int ret = 0;
@@ -2445,14 +2484,13 @@ int drm_mode_getfb(struct drm_device *dev,
return -EINVAL;
drm_modeset_lock_all(dev);
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj) {
+ fb = drm_framebuffer_lookup(dev, r->fb_id);
+ if (!fb) {
ret = -EINVAL;
goto out;
}
- fb = obj_to_fb(obj);
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
r->height = fb->height;
r->width = fb->width;
@@ -2472,7 +2510,6 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
struct drm_clip_rect __user *clips_ptr;
struct drm_clip_rect *clips = NULL;
struct drm_mode_fb_dirty_cmd *r = data;
- struct drm_mode_object *obj;
struct drm_framebuffer *fb;
unsigned flags;
int num_clips;
@@ -2482,14 +2519,13 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
return -EINVAL;
drm_modeset_lock_all(dev);
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj) {
+ fb = drm_framebuffer_lookup(dev, r->fb_id);
+ if (!fb) {
ret = -EINVAL;
goto out_err1;
}
- fb = obj_to_fb(obj);
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
num_clips = r->num_clips;
clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
@@ -3590,12 +3626,11 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
if (crtc->funcs->page_flip == NULL)
goto out;
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, page_flip->fb_id, DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj)
+ fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
+ if (!fb)
goto out;
- fb = obj_to_fb(obj);
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
hdisplay = crtc->mode.hdisplay;
vdisplay = crtc->mode.vdisplay;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
index 84c2c44..4a73e9e 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
@@ -129,7 +129,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
struct vmw_master *vmaster = vmw_master(file_priv->master);
struct drm_vmw_rect __user *clips_ptr;
struct drm_vmw_rect *clips = NULL;
- struct drm_mode_object *obj;
+ struct drm_framebuffer *fb;
struct vmw_framebuffer *vfb;
struct vmw_resource *res;
uint32_t num_clips;
@@ -163,15 +163,15 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
drm_modeset_lock_all(dev);
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj) {
+ fb = drm_framebuffer_lookup(dev, arg->fb_id);
+ if (!fb) {
DRM_ERROR("Invalid framebuffer id.\n");
ret = -EINVAL;
goto out_no_fb;
}
- vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
+ vfb = vmw_framebuffer_to_vfb(fb);
ret = ttm_read_lock(&vmaster->lock, true);
if (unlikely(ret != 0))
@@ -215,7 +215,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
struct vmw_master *vmaster = vmw_master(file_priv->master);
struct drm_vmw_rect __user *clips_ptr;
struct drm_vmw_rect *clips = NULL;
- struct drm_mode_object *obj;
+ struct drm_framebuffer *fb;
struct vmw_framebuffer *vfb;
uint32_t num_clips;
int ret;
@@ -248,16 +248,16 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
drm_modeset_lock_all(dev);
- mutex_lock(&dev->mode_config.fb_lock);
- obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
- mutex_unlock(&dev->mode_config.fb_lock);
- if (!obj) {
+ fb = drm_framebuffer_lookup(dev, arg->fb_id);
+ if (!fb) {
DRM_ERROR("Invalid framebuffer id.\n");
ret = -EINVAL;
goto out_no_fb;
}
+ /* fb is protect by the mode_config lock, so drop the ref immediately */
+ drm_framebuffer_unreference(fb);
- vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
+ vfb = vmw_framebuffer_to_vfb(fb);
if (!vfb->dmabuf) {
DRM_ERROR("Framebuffer not dmabuf backed.\n");
ret = -EINVAL;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 334765a..77b6a2d 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -964,6 +964,8 @@ extern void drm_framebuffer_set_object(struct drm_device *dev,
extern int drm_framebuffer_init(struct drm_device *dev,
struct drm_framebuffer *fb,
const struct drm_framebuffer_funcs *funcs);
+extern struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
+ uint32_t id);
extern void drm_framebuffer_unreference(struct drm_framebuffer *fb);
extern void drm_framebuffer_reference(struct drm_framebuffer *fb);
extern void drm_framebuffer_remove(struct drm_framebuffer *fb);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 19/37] drm/gma500: move fbcon restore to lastclose
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (12 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 18/37] drm: create drm_framebuffer_lookup Daniel Vetter
@ 2012-12-12 13:06 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 20/37] drm: revamp framebuffer cleanup interfaces Daniel Vetter
` (13 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:06 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Doing this within the fb->destroy callback leads to a locking
nightmare. And all other drm drivers that restore the fbcon do
it in lastclose, too.
With this adjustments all fb->destroy callbacks optionally drop
references to any gem objects used as backing storage, call
drm_framebuffer_cleanup and then kfree the struct. Which nicely
simplifies the locking for framebuffer unreferencing and freeing,
since this doesn't require that we hold the mode_config lock. A
slight exception is the vmwgfx surface backed framebuffer, it also
calls drm_master_put and removes the object from a device-private
framebuffer list. Both seem to have solid locking in place already.
Conclusion is that now it is no longer required to hold the
mode_config lock while freeing a framebuffer.
v2: Drop the corresponding mutex_lock WARN check from
drm_framebuffer_unreference.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 2 --
drivers/gpu/drm/gma500/framebuffer.c | 24 ------------------------
drivers/gpu/drm/gma500/psb_drv.c | 11 +++++++++++
3 files changed, 11 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 75ffc3b..17cdd32 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -412,9 +412,7 @@ EXPORT_SYMBOL(drm_framebuffer_lookup);
*/
void drm_framebuffer_unreference(struct drm_framebuffer *fb)
{
- struct drm_device *dev = fb->dev;
DRM_DEBUG("FB ID: %d\n", fb->base.id);
- WARN_ON(!drm_modeset_is_locked(dev));
kref_put(&fb->refcount, drm_framebuffer_free);
}
EXPORT_SYMBOL(drm_framebuffer_unreference);
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 38e7e75..49800d2 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -668,30 +668,6 @@ static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct psb_framebuffer *psbfb = to_psb_fb(fb);
struct gtt_range *r = psbfb->gtt;
- struct drm_device *dev = fb->dev;
- struct drm_psb_private *dev_priv = dev->dev_private;
- struct psb_fbdev *fbdev = dev_priv->fbdev;
- struct drm_crtc *crtc;
- int reset = 0;
-
- /* Should never get stolen memory for a user fb */
- WARN_ON(r->stolen);
-
- /* Check if we are erroneously live */
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
- if (crtc->fb == fb)
- reset = 1;
-
- if (reset)
- /*
- * Now force a sane response before we permit the DRM CRTC
- * layer to do stupid things like blank the display. Instead
- * we reset this framebuffer as if the user had forced a reset.
- * We must do this before the cleanup so that the DRM layer
- * doesn't get a chance to stick its oar in where it isn't
- * wanted.
- */
- drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
/* Let DRM do its clean up */
drm_framebuffer_cleanup(fb);
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 2bf0c92..5518305 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -149,6 +149,17 @@ static struct drm_ioctl_desc psb_ioctls[] = {
static void psb_lastclose(struct drm_device *dev)
{
+ int ret;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct psb_fbdev *fbdev = dev_priv->fbdev;
+
+ drm_modeset_lock_all(dev);
+ ret = drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
+ if (ret)
+ DRM_DEBUG("failed to restore crtc mode\n");
+
+ drm_modeset_unlock_all(dev);
+
return;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 20/37] drm: revamp framebuffer cleanup interfaces
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (13 preceding siblings ...)
2012-12-12 13:06 ` [PATCH 19/37] drm/gma500: move fbcon restore to lastclose Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 21/37] drm: reference framebuffers which are on the idr Daniel Vetter
` (12 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
We have two classes of framebuffer
- Created by the driver (atm only for fbdev), and the driver holds
onto the last reference count until destruction.
- Created by userspace and associated with a given fd. These
framebuffers will be reaped when their assoiciated fb is closed.
Now these two cases are set up differently, the framebuffers are on
different lists and hence destruction needs to clean up different
things. Also, for userspace framebuffers we remove them from any
current usage, whereas for internal framebuffers it is assumed that
the driver has done this already.
Long story short, we need two different ways to cleanup such drivers.
Three functions are involved in total:
- drm_framebuffer_remove: Convenience function which removes the fb
from all active usage and then drops the passed-in reference.
- drm_framebuffer_unregister_private: Will remove driver-private
framebuffers from relevant lists and drop the corresponding
references. Should be called for driver-private framebuffers before
dropping the last reference (or like for a lot of the drivers where
the fbdev is embedded someplace else, before doing the cleanup
manually).
- drm_framebuffer_cleanup: Final cleanup for both classes of fbs,
should be called by the driver's ->destroy callback once the last
reference is gone.
This patch just rolls out the new interfaces and updates all drivers
(by adding calls to drm_framebuffer_unregister_private at all the
right places)- no functional changes yet. Follow-on patches will move
drm core code around and update the lifetime management for
framebuffers, so that we are no longer required to keep framebuffers
alive by locking mode_config.mutex.
I've also updated the kerneldoc already.
vmwgfx seems to again be a bit special, at least I haven't figured out
how the fbdev support in that driver works. It smells like it's
external though.
v2: The i915 driver creates another private framebuffer in the
load-detect code. Adjust its cleanup code, too.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/ast/ast_fb.c | 1 +
drivers/gpu/drm/cirrus/cirrus_fbdev.c | 1 +
drivers/gpu/drm/drm_crtc.c | 31 ++++++++++++++++++++++++++---
drivers/gpu/drm/drm_fb_cma_helper.c | 5 ++++-
drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 4 +++-
drivers/gpu/drm/gma500/framebuffer.c | 1 +
drivers/gpu/drm/i915/intel_display.c | 6 ++++--
drivers/gpu/drm/i915/intel_fb.c | 1 +
drivers/gpu/drm/mgag200/mgag200_fb.c | 1 +
drivers/gpu/drm/nouveau/nouveau_fbcon.c | 1 +
drivers/gpu/drm/radeon/radeon_fb.c | 2 ++
drivers/gpu/drm/udl/udl_fb.c | 1 +
drivers/staging/omapdrm/omap_fbdev.c | 8 ++++++--
include/drm/drm_crtc.h | 1 +
14 files changed, 55 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_fb.c b/drivers/gpu/drm/ast/ast_fb.c
index d9ec779..3e6584b 100644
--- a/drivers/gpu/drm/ast/ast_fb.c
+++ b/drivers/gpu/drm/ast/ast_fb.c
@@ -290,6 +290,7 @@ static void ast_fbdev_destroy(struct drm_device *dev,
drm_fb_helper_fini(&afbdev->helper);
vfree(afbdev->sysram);
+ drm_framebuffer_unregister_private(&afb->base);
drm_framebuffer_cleanup(&afb->base);
}
diff --git a/drivers/gpu/drm/cirrus/cirrus_fbdev.c b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
index 6c6b4c8..3daea0f 100644
--- a/drivers/gpu/drm/cirrus/cirrus_fbdev.c
+++ b/drivers/gpu/drm/cirrus/cirrus_fbdev.c
@@ -258,6 +258,7 @@ static int cirrus_fbdev_destroy(struct drm_device *dev,
vfree(gfbdev->sysram);
drm_fb_helper_fini(&gfbdev->helper);
+ drm_framebuffer_unregister_private(&gfb->base);
drm_framebuffer_cleanup(&gfb->base);
return 0;
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 17cdd32..e2d70f6 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -68,6 +68,7 @@ void drm_modeset_unlock_all(struct drm_device *dev)
mutex_unlock(&dev->mode_config.mutex);
}
+
EXPORT_SYMBOL(drm_modeset_unlock_all);
/* Avoid boilerplate. I'm tired of typing. */
@@ -429,11 +430,34 @@ void drm_framebuffer_reference(struct drm_framebuffer *fb)
EXPORT_SYMBOL(drm_framebuffer_reference);
/**
+ * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
+ * @fb: fb to unregister
+ *
+ * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
+ * those used for fbdev. Note that the caller must hold a reference of it's own,
+ * i.e. the object may not be destroyed through this call (since it'll lead to a
+ * locking inversion).
+ */
+void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
+{
+}
+EXPORT_SYMBOL(drm_framebuffer_unregister_private);
+
+/**
* drm_framebuffer_cleanup - remove a framebuffer object
* @fb: framebuffer to remove
*
- * Scans all the CRTCs in @dev's mode_config. If they're using @fb, removes
- * it, setting it to NULL.
+ * Cleanup references to a user-created framebuffer. This function is intended
+ * to be used from the drivers ->destroy callback.
+ *
+ * Note that this function does not remove the fb from active usuage - if it is
+ * still used anywhere, hilarity can ensue since userspace could call getfb on
+ * the id and get back -EINVAL. Obviously no concern at driver unload time.
+ *
+ * Also, the framebuffer will not be removed from the lookup idr - for
+ * user-created framebuffers this will happen in in the rmfb ioctl. For
+ * driver-private objects (e.g. for fbdev) drivers need to explicitly call
+ * drm_framebuffer_unregister_private.
*/
void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
{
@@ -459,7 +483,8 @@ EXPORT_SYMBOL(drm_framebuffer_cleanup);
* @fb: framebuffer to remove
*
* Scans all the CRTCs and planes in @dev's mode_config. If they're
- * using @fb, removes it, setting it to NULL.
+ * using @fb, removes it, setting it to NULL. Then drops the reference to the
+ * passed-in framebuffer.
*/
void drm_framebuffer_remove(struct drm_framebuffer *fb)
{
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index e1e0cb0..3742bc9 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -266,6 +266,7 @@ static int drm_fbdev_cma_create(struct drm_fb_helper *helper,
return 0;
err_drm_fb_cma_destroy:
+ drm_framebuffer_unregister_private(fb);
drm_fb_cma_destroy(fb);
err_framebuffer_release:
framebuffer_release(fbi);
@@ -370,8 +371,10 @@ void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma)
framebuffer_release(info);
}
- if (fbdev_cma->fb)
+ if (fbdev_cma->fb) {
+ drm_framebuffer_unregister_private(&fbdev_cma->fb->fb);
drm_fb_cma_destroy(&fbdev_cma->fb->fb);
+ }
drm_fb_helper_fini(&fbdev_cma->fb_helper);
kfree(fbdev_cma);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index 67eb6ba..d333e9b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -269,8 +269,10 @@ static void exynos_drm_fbdev_destroy(struct drm_device *dev,
/* release drm framebuffer and real buffer */
if (fb_helper->fb && fb_helper->fb->funcs) {
fb = fb_helper->fb;
- if (fb)
+ if (fb) {
+ drm_framebuffer_unregister_private(fb);
drm_framebuffer_remove(fb);
+ }
}
/* release linux framebuffer */
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 49800d2..c1ef37e 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -590,6 +590,7 @@ static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
framebuffer_release(info);
}
drm_fb_helper_fini(&fbdev->psb_fb_helper);
+ drm_framebuffer_unregister_private(&psbfb->base);
drm_framebuffer_cleanup(&psbfb->base);
if (psbfb->gtt)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 65f5362..fd8cfeb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6479,8 +6479,10 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
intel_encoder->new_crtc = NULL;
intel_set_mode(crtc, NULL, 0, 0, NULL);
- if (old->release_fb)
- old->release_fb->funcs->destroy(old->release_fb);
+ if (old->release_fb) {
+ drm_framebuffer_unregister_private(old->release_fb);
+ drm_framebuffer_unreference(old->release_fb);
+ }
return;
}
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index ed7bb33..dca62dd 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -214,6 +214,7 @@ static void intel_fbdev_destroy(struct drm_device *dev,
drm_fb_helper_fini(&ifbdev->helper);
+ drm_framebuffer_unregister_private(&ifb->base);
drm_framebuffer_cleanup(&ifb->base);
if (ifb->obj) {
drm_gem_object_unreference_unlocked(&ifb->obj->base);
diff --git a/drivers/gpu/drm/mgag200/mgag200_fb.c b/drivers/gpu/drm/mgag200/mgag200_fb.c
index 2f48648..5c69b43 100644
--- a/drivers/gpu/drm/mgag200/mgag200_fb.c
+++ b/drivers/gpu/drm/mgag200/mgag200_fb.c
@@ -247,6 +247,7 @@ static int mga_fbdev_destroy(struct drm_device *dev,
}
drm_fb_helper_fini(&mfbdev->helper);
vfree(mfbdev->sysram);
+ drm_framebuffer_unregister_private(&mfb->base);
drm_framebuffer_cleanup(&mfb->base);
return 0;
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 67a1a06..d4ecb4d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -433,6 +433,7 @@ nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
nouveau_fb->nvbo = NULL;
}
drm_fb_helper_fini(&fbcon->helper);
+ drm_framebuffer_unregister_private(&nouveau_fb->base);
drm_framebuffer_cleanup(&nouveau_fb->base);
return 0;
}
diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index cc8489d..515e5ee 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -293,6 +293,7 @@ out_unref:
}
if (fb && ret) {
drm_gem_object_unreference(gobj);
+ drm_framebuffer_unregister_private(fb);
drm_framebuffer_cleanup(fb);
kfree(fb);
}
@@ -339,6 +340,7 @@ static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfb
rfb->obj = NULL;
}
drm_fb_helper_fini(&rfbdev->helper);
+ drm_framebuffer_unregister_private(&rfb->base);
drm_framebuffer_cleanup(&rfb->base);
return 0;
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index 829c4a7..c09c04e 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -556,6 +556,7 @@ static void udl_fbdev_destroy(struct drm_device *dev,
framebuffer_release(info);
}
drm_fb_helper_fini(&ufbdev->helper);
+ drm_framebuffer_unregister_private(&ufbdev->ufb.base);
drm_framebuffer_cleanup(&ufbdev->ufb.base);
drm_gem_object_unreference_unlocked(&ufbdev->ufb.obj->base);
}
diff --git a/drivers/staging/omapdrm/omap_fbdev.c b/drivers/staging/omapdrm/omap_fbdev.c
index 8a027bb..2728e37 100644
--- a/drivers/staging/omapdrm/omap_fbdev.c
+++ b/drivers/staging/omapdrm/omap_fbdev.c
@@ -275,8 +275,10 @@ fail:
if (ret) {
if (fbi)
framebuffer_release(fbi);
- if (fb)
+ if (fb) {
+ drm_framebuffer_unregister_private(fb);
drm_framebuffer_remove(fb);
+ }
}
return ret;
@@ -400,8 +402,10 @@ void omap_fbdev_free(struct drm_device *dev)
fbdev = to_omap_fbdev(priv->fbdev);
/* this will free the backing object */
- if (fbdev->fb)
+ if (fbdev->fb) {
+ drm_framebuffer_unregister_private(fbdev->fb);
drm_framebuffer_remove(fbdev->fb);
+ }
kfree(fbdev);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 77b6a2d..b24ad78 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -970,6 +970,7 @@ extern void drm_framebuffer_unreference(struct drm_framebuffer *fb);
extern void drm_framebuffer_reference(struct drm_framebuffer *fb);
extern void drm_framebuffer_remove(struct drm_framebuffer *fb);
extern void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
+extern void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);
extern int drmfb_probe(struct drm_device *dev, struct drm_crtc *crtc);
extern int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb);
extern void drm_crtc_probe_connector_modes(struct drm_device *dev, int maxX, int maxY);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 21/37] drm: reference framebuffers which are on the idr
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (14 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 20/37] drm: revamp framebuffer cleanup interfaces Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 22/37] drm: nest modeset locks within fpriv->fbs_lock Daniel Vetter
` (11 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Since otherwise looking and reference-counting around
drm_framebuffer_lookup will be an unmanageable mess. With this change,
an object can either be found in the idr and will stay around once we
incremented the reference counter. Or it will be gone for good and
can't be looked up using its id any more.
Atomicity is guaranteed by the dev->mode_config.fb_lock. The
newly-introduce fpriv->fbs_lock looks a bit redundant, but the next
patch will shuffle the locking order between these two locks and all
the modeset locks taken in modeset_lock_all, so we'll need it.
Also, since userspace could do really funky stuff and race e.g. a
getresources with an rmfb, we need to make sure that the kernel
doesn't fall over trying to look-up an inexistent fb, or causing
confusion by having two fbs around with the same id. Simply reset the
framebuffer id to 0, which marks it as reaped. Any lookups of that id
will fail, so the object is really gone for good from userspace's pov.
Note that we still need to protect the "remove framebuffer from all
use-cases" and the final unreference with the modeset-lock, since most
framebuffer use-sites don't implement proper reference counting yet.
We can only lift this once _all_ users are converted.
With this change, two references are held on alife, but unused
framebuffers:
- The reference for the idr lookup, created in this patch.
- For user-created framebuffers the fpriv->fbs reference, for
driver-private fbs the driver is supposed to hold it's own last
reference.
Note that the dev->mode_config.fb_list itself does _not_ hold a
reference onto the framebuffers (this list is essentially only used
for debugfs files). Hence if there's anything left there when the
driver has cleaned up all it's modeset resources, this is a ref-leak.
WARN about it.
Now we only need to fix up all other places to properly reference
count framebuffers.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 118 ++++++++++++++++++++++++++++++--------------
1 file changed, 80 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index e2d70f6..20ccdc4 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -356,6 +356,9 @@ int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
if (ret)
return ret;
+ /* Grab the idr reference. */
+ drm_framebuffer_reference(fb);
+
dev->mode_config.num_fb++;
list_add(&fb->head, &dev->mode_config.fb_list);
mutex_unlock(&dev->mode_config.fb_lock);
@@ -371,6 +374,23 @@ static void drm_framebuffer_free(struct kref *kref)
fb->funcs->destroy(fb);
}
+static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
+ uint32_t id)
+{
+ struct drm_mode_object *obj = NULL;
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&dev->mode_config.idr_mutex);
+ obj = idr_find(&dev->mode_config.crtc_idr, id);
+ if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
+ fb = NULL;
+ else
+ fb = obj_to_fb(obj);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ return fb;
+}
+
/**
* drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
* @dev: drm device
@@ -383,22 +403,12 @@ static void drm_framebuffer_free(struct kref *kref)
struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
uint32_t id)
{
- struct drm_mode_object *obj = NULL;
struct drm_framebuffer *fb;
mutex_lock(&dev->mode_config.fb_lock);
-
- mutex_lock(&dev->mode_config.idr_mutex);
- obj = idr_find(&dev->mode_config.crtc_idr, id);
- if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
- fb = NULL;
- else
- fb = obj_to_fb(obj);
- mutex_unlock(&dev->mode_config.idr_mutex);
-
+ fb = __drm_framebuffer_lookup(dev, id);
if (fb)
kref_get(&fb->refcount);
-
mutex_unlock(&dev->mode_config.fb_lock);
return fb;
@@ -429,6 +439,24 @@ void drm_framebuffer_reference(struct drm_framebuffer *fb)
}
EXPORT_SYMBOL(drm_framebuffer_reference);
+static void drm_framebuffer_free_bug(struct kref *kref)
+{
+ BUG();
+}
+
+/* dev->mode_config.fb_lock must be held! */
+static void __drm_framebuffer_unregister(struct drm_device *dev,
+ struct drm_framebuffer *fb)
+{
+ mutex_lock(&dev->mode_config.idr_mutex);
+ idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
+ mutex_unlock(&dev->mode_config.idr_mutex);
+
+ fb->base.id = 0;
+
+ kref_put(&fb->refcount, drm_framebuffer_free_bug);
+}
+
/**
* drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
* @fb: fb to unregister
@@ -440,6 +468,12 @@ EXPORT_SYMBOL(drm_framebuffer_reference);
*/
void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
{
+ struct drm_device *dev = fb->dev;
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ /* Mark fb as reaped and drop idr ref. */
+ __drm_framebuffer_unregister(dev, fb);
+ mutex_unlock(&dev->mode_config.fb_lock);
}
EXPORT_SYMBOL(drm_framebuffer_unregister_private);
@@ -463,14 +497,6 @@ void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
{
struct drm_device *dev = fb->dev;
- /*
- * This could be moved to drm_framebuffer_remove(), but for
- * debugging is nice to keep around the list of fb's that are
- * no longer associated w/ a drm_file but are not unreferenced
- * yet. (i915 and omapdrm have debugfs files which will show
- * this.)
- */
- drm_mode_object_put(dev, &fb->base);
mutex_lock(&dev->mode_config.fb_lock);
list_del(&fb->head);
dev->mode_config.num_fb--;
@@ -1180,9 +1206,15 @@ void drm_mode_config_cleanup(struct drm_device *dev)
drm_property_destroy(dev, property);
}
- /* Single-threaded teardown context, so it's not requied to grab the
+ /*
+ * Single-threaded teardown context, so it's not requied to grab the
* fb_lock to protect against concurrent fb_list access. Contrary, it
- * would actually deadlock with the drm_framebuffer_cleanup function. */
+ * would actually deadlock with the drm_framebuffer_cleanup function.
+ *
+ * Also, if there are any framebuffers left, that's a driver leak now,
+ * so politely WARN about this.
+ */
+ WARN_ON(!list_empty(&dev->mode_config.fb_list));
list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
drm_framebuffer_remove(fb);
}
@@ -2448,39 +2480,41 @@ int drm_mode_rmfb(struct drm_device *dev,
struct drm_framebuffer *fb = NULL;
struct drm_framebuffer *fbl = NULL;
uint32_t *id = data;
- int ret = 0;
int found = 0;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- drm_modeset_lock_all(dev);
- fb = drm_framebuffer_lookup(dev, *id);
- if (!fb) {
- ret = -EINVAL;
- goto out;
- }
- /* fb is protect by the mode_config lock, so drop the ref immediately */
- drm_framebuffer_unreference(fb);
-
mutex_lock(&file_priv->fbs_lock);
+ mutex_lock(&dev->mode_config.fb_lock);
+ fb = __drm_framebuffer_lookup(dev, *id);
+ if (!fb)
+ goto fail_lookup;
+
list_for_each_entry(fbl, &file_priv->fbs, filp_head)
if (fb == fbl)
found = 1;
- if (!found) {
- ret = -EINVAL;
- mutex_unlock(&file_priv->fbs_lock);
- goto out;
- }
+ if (!found)
+ goto fail_lookup;
+
+ /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
+ __drm_framebuffer_unregister(dev, fb);
list_del_init(&fb->filp_head);
+ mutex_unlock(&dev->mode_config.fb_lock);
mutex_unlock(&file_priv->fbs_lock);
+ drm_modeset_lock_all(dev);
drm_framebuffer_remove(fb);
-out:
drm_modeset_unlock_all(dev);
- return ret;
+ return 0;
+
+fail_lookup:
+ mutex_unlock(&dev->mode_config.fb_lock);
+ mutex_unlock(&file_priv->fbs_lock);
+
+ return -EINVAL;
}
/**
@@ -2620,7 +2654,15 @@ void drm_fb_release(struct drm_file *priv)
drm_modeset_lock_all(dev);
mutex_lock(&priv->fbs_lock);
list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
+
+ mutex_lock(&dev->mode_config.fb_lock);
+ /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
+ __drm_framebuffer_unregister(dev, fb);
+ mutex_unlock(&dev->mode_config.fb_lock);
+
list_del_init(&fb->filp_head);
+
+ /* This will also drop the fpriv->fbs reference. */
drm_framebuffer_remove(fb);
}
mutex_unlock(&priv->fbs_lock);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 22/37] drm: nest modeset locks within fpriv->fbs_lock
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (15 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 21/37] drm: reference framebuffers which are on the idr Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 23/37] drm/i915: fixup overlay stolen memory leak Daniel Vetter
` (10 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Atm we still need to unconditionally take the modeset locks in the
rmfb paths. But eventually we only want to take them if there are
other users around as a slow-path. This way sane userspace avoids
blocking on edid reads and other stuff in rmfb if it ensures that the
fb isn't used anywhere by a crtc/plane.
We can do a quick check for such other users once framebuffers are
properly refcounting by locking at the refcount - if it's more than 1,
there are other users left. Again, rmfb racing against other ioctls
isn't a real problem, userspace is allowed to shoot its foot.
This patch just prepares this by moving the modeset locks to nest
within fpriv->fbs_lock. Now the distinction between the fbs_lock and
the device-global fb_lock is clear, since we need to hold the fbs_lock
outside of any modeset_locks in fb_release.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 20ccdc4..33e95bb 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2266,13 +2266,13 @@ int drm_mode_addfb(struct drm_device *dev,
drm_modeset_unlock_all(dev);
return PTR_ERR(fb);
}
+ drm_modeset_unlock_all(dev);
mutex_lock(&file_priv->fbs_lock);
or->fb_id = fb->base.id;
list_add(&fb->filp_head, &file_priv->fbs);
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
mutex_unlock(&file_priv->fbs_lock);
- drm_modeset_unlock_all(dev);
return ret;
}
@@ -2449,6 +2449,7 @@ int drm_mode_addfb2(struct drm_device *dev,
drm_modeset_unlock_all(dev);
return PTR_ERR(fb);
}
+ drm_modeset_unlock_all(dev);
mutex_lock(&file_priv->fbs_lock);
r->fb_id = fb->base.id;
@@ -2456,7 +2457,6 @@ int drm_mode_addfb2(struct drm_device *dev,
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
mutex_unlock(&file_priv->fbs_lock);
- drm_modeset_unlock_all(dev);
return ret;
}
@@ -2651,7 +2651,6 @@ void drm_fb_release(struct drm_file *priv)
struct drm_device *dev = priv->minor->dev;
struct drm_framebuffer *fb, *tfb;
- drm_modeset_lock_all(dev);
mutex_lock(&priv->fbs_lock);
list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
@@ -2663,10 +2662,11 @@ void drm_fb_release(struct drm_file *priv)
list_del_init(&fb->filp_head);
/* This will also drop the fpriv->fbs reference. */
+ drm_modeset_lock_all(dev);
drm_framebuffer_remove(fb);
+ drm_modeset_unlock_all(dev);
}
mutex_unlock(&priv->fbs_lock);
- drm_modeset_unlock_all(dev);
}
/**
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 23/37] drm/i915: fixup overlay stolen memory leak
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (16 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 22/37] drm: nest modeset locks within fpriv->fbs_lock Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 24/37] drm: push modeset_lock_all into ->fb_create driver callbacks Daniel Vetter
` (9 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Chris Wilson,
Radeon Dev, Daniel Vetter
We need to clean up the overlay first, before taking down the
stolen memory allocator.
This regression has been introducec in
commit 8040513870399f1cb032cb8bc805df5042fedcdf
Author: Chris Wilson <chris-Y6uKTt2uX1cEflXRtASbqLVCufUGDwFn@public.gmane.org>
Date: Thu Nov 15 11:32:29 2012 +0000
drm/i915: Allocate overlay registers from stolen memory
Note: This is just a quick hack to shut up a warning in the module
unload code, so that I can check again whether we don't leak any
framebuffers.
Cc: Chris Wilson <chris-Y6uKTt2uX1cEflXRtASbqLVCufUGDwFn@public.gmane.org>
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/i915/i915_dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index ad488f6..532ad39 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1720,9 +1720,9 @@ int i915_driver_unload(struct drm_device *dev)
mutex_unlock(&dev->struct_mutex);
i915_gem_cleanup_aliasing_ppgtt(dev);
i915_gem_cleanup_stolen(dev);
- drm_mm_takedown(&dev_priv->mm.stolen);
intel_cleanup_overlay(dev);
+ drm_mm_takedown(&dev_priv->mm.stolen);
if (!I915_NEED_GFX_HWS(dev))
i915_free_hws(dev);
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 24/37] drm: push modeset_lock_all into ->fb_create driver callbacks
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (17 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 23/37] drm/i915: fixup overlay stolen memory leak Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 27/37] drm: refcounting for sprite framebuffers Daniel Vetter
` (8 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
And drop it where it's not needed. Most driver just lookup the gem
object, allocate an fb struct, fill in all the useful fields and then
register it with drm_framebuffer_init.
All of these operations are already separately locked, and since we
only put the fb into the fpriv->fbs list _after_ having called
->fb_create, we can't also race with rmfb. We can otoh race with other
ioctls that put the framebuffer to use, but all drivers have been
reorganized already to call drm_framebuffer_init last in the fb
creation sequence.
So essentially, we can completely remove any modeset locks from the
addfb ioctl paths. Yeah!
Also, reference-counting is solid - we get a reference from fb_create
which we transfer to the fpriv->fbs list. And after unlocking the
fpriv->fbs_lock we don't touch the framebuffer any longer. Furthermore
drm_framebuffer_init has added a 2nd reference for the idr lookup, and
any access through that table will do it's own refcounting.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 33e95bb..9ad807d 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2255,18 +2255,12 @@ int drm_mode_addfb(struct drm_device *dev,
if ((config->min_height > r.height) || (r.height > config->max_height))
return -EINVAL;
- drm_modeset_lock_all(dev);
-
- /* TODO check buffer is sufficiently large */
- /* TODO setup destructor callback */
-
fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
if (IS_ERR(fb)) {
DRM_DEBUG_KMS("could not create framebuffer\n");
drm_modeset_unlock_all(dev);
return PTR_ERR(fb);
}
- drm_modeset_unlock_all(dev);
mutex_lock(&file_priv->fbs_lock);
or->fb_id = fb->base.id;
@@ -2441,15 +2435,12 @@ int drm_mode_addfb2(struct drm_device *dev,
if (ret)
return ret;
- drm_modeset_lock_all(dev);
-
fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
if (IS_ERR(fb)) {
DRM_DEBUG_KMS("could not create framebuffer\n");
drm_modeset_unlock_all(dev);
return PTR_ERR(fb);
}
- drm_modeset_unlock_all(dev);
mutex_lock(&file_priv->fbs_lock);
r->fb_id = fb->base.id;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 27/37] drm: refcounting for sprite framebuffers
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (18 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 24/37] drm: push modeset_lock_all into ->fb_create driver callbacks Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 28/37] drm: encapsulate crtc->set_config calls Daniel Vetter
` (7 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
Now plane->fb holds a reference onto it's framebuffer. Nothing too
fancy going on here:
- Extract __drm_framebuffer_unreference to be called when we know
we're not dropping the last reference, e.g. useful in the fb cleanup
code.
- Reduce the locked sections in the set_plane ioctl to only protect
plane->fb/plane->crtc and the driver callback (i.e. hw state).
Everything either doesn't disappear (crtc, plane) or is refcounted
(fb), and all the data we check is invariant over the respective
object's lifetimes.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 30 +++++++++++++++++++++---------
1 file changed, 21 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 8132e13..ccf15ad 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -444,6 +444,12 @@ static void drm_framebuffer_free_bug(struct kref *kref)
BUG();
}
+static void __drm_framebuffer_unreference(struct drm_framebuffer *fb)
+{
+ DRM_DEBUG("FB ID: %d\n", fb->base.id);
+ kref_put(&fb->refcount, drm_framebuffer_free_bug);
+}
+
/* dev->mode_config.fb_lock must be held! */
static void __drm_framebuffer_unregister(struct drm_device *dev,
struct drm_framebuffer *fb)
@@ -454,7 +460,7 @@ static void __drm_framebuffer_unregister(struct drm_device *dev,
fb->base.id = 0;
- kref_put(&fb->refcount, drm_framebuffer_free_bug);
+ __drm_framebuffer_unreference(fb);
}
/**
@@ -543,6 +549,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
if (ret)
DRM_ERROR("failed to disable plane with busy fb\n");
/* disconnect the plane from the fb and crtc: */
+ __drm_framebuffer_unreference(plane->fb);
plane->fb = NULL;
plane->crtc = NULL;
}
@@ -1849,7 +1856,7 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
struct drm_mode_object *obj;
struct drm_plane *plane;
struct drm_crtc *crtc;
- struct drm_framebuffer *fb;
+ struct drm_framebuffer *fb = NULL, *old_fb = NULL;
int ret = 0;
unsigned int fb_width, fb_height;
int i;
@@ -1857,8 +1864,6 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
- drm_modeset_lock_all(dev);
-
/*
* First, find the plane, crtc, and fb objects. If not available,
* we don't bother to call the driver.
@@ -1868,16 +1873,18 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
if (!obj) {
DRM_DEBUG_KMS("Unknown plane ID %d\n",
plane_req->plane_id);
- ret = -ENOENT;
- goto out;
+ return -ENOENT;
}
plane = obj_to_plane(obj);
/* No fb means shut it down */
if (!plane_req->fb_id) {
+ drm_modeset_lock_all(dev);
+ old_fb = plane->fb;
plane->funcs->disable_plane(plane);
plane->crtc = NULL;
plane->fb = NULL;
+ drm_modeset_unlock_all(dev);
goto out;
}
@@ -1898,8 +1905,6 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
ret = -ENOENT;
goto out;
}
- /* fb is protect by the mode_config lock, so drop the ref immediately */
- drm_framebuffer_unreference(fb);
/* Check whether this plane supports the fb pixel format. */
for (i = 0; i < plane->format_count; i++)
@@ -1945,18 +1950,25 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
goto out;
}
+ drm_modeset_lock_all(dev);
ret = plane->funcs->update_plane(plane, crtc, fb,
plane_req->crtc_x, plane_req->crtc_y,
plane_req->crtc_w, plane_req->crtc_h,
plane_req->src_x, plane_req->src_y,
plane_req->src_w, plane_req->src_h);
if (!ret) {
+ old_fb = plane->fb;
+ fb = NULL;
plane->crtc = crtc;
plane->fb = fb;
}
+ drm_modeset_unlock_all(dev);
out:
- drm_modeset_unlock_all(dev);
+ if (fb)
+ drm_framebuffer_unreference(fb);
+ if (old_fb)
+ drm_framebuffer_unreference(old_fb);
return ret;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 28/37] drm: encapsulate crtc->set_config calls
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (19 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 27/37] drm: refcounting for sprite framebuffers Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 29/37] drm: refcounting for crtc framebuffers Daniel Vetter
` (6 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
With refcounting we need to adjust framebuffer refcounts at each
callsite - much easier to do if they all call the same little helper
function.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 19 +++++++++++++++++--
drivers/gpu/drm/drm_fb_helper.c | 6 +++---
drivers/gpu/drm/i2c/ch7006_drv.c | 2 +-
drivers/gpu/drm/nouveau/nv04_display.c | 2 +-
drivers/gpu/drm/nouveau/nv17_tv.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +-
include/drm/drm_crtc.h | 1 +
7 files changed, 25 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index ccf15ad..229853e 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -536,7 +536,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
memset(&set, 0, sizeof(struct drm_mode_set));
set.crtc = crtc;
set.fb = NULL;
- ret = crtc->funcs->set_config(&set);
+ ret = drm_mode_set_config_internal(&set);
if (ret)
DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
}
@@ -1974,6 +1974,21 @@ out:
}
/**
+ * drm_mode_set_config_internal - helper to call ->set_config
+ * @set: modeset config to set
+ *
+ * This is a little helper to wrap internal calls to the ->set_config driver
+ * interface. The only thing it adds is correct refcounting dance.
+ */
+int drm_mode_set_config_internal(struct drm_mode_set *set)
+{
+ struct drm_crtc *crtc = set->crtc;
+
+ return crtc->funcs->set_config(set);
+}
+EXPORT_SYMBOL(drm_mode_set_config_internal);
+
+/**
* drm_mode_setcrtc - set CRTC configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
@@ -2137,7 +2152,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
set.connectors = connector_set;
set.num_connectors = crtc_req->count_connectors;
set.fb = fb;
- ret = crtc->funcs->set_config(&set);
+ ret = drm_mode_set_config_internal(&set);
out:
kfree(connector_set);
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index d84ec67..403d53e 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -245,7 +245,7 @@ bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
int i, ret;
for (i = 0; i < fb_helper->crtc_count; i++) {
struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
- ret = mode_set->crtc->funcs->set_config(mode_set);
+ ret = drm_mode_set_config_internal(mode_set);
if (ret)
error = true;
}
@@ -675,7 +675,7 @@ int drm_fb_helper_set_par(struct fb_info *info)
drm_modeset_lock_all(dev);
for (i = 0; i < fb_helper->crtc_count; i++) {
crtc = fb_helper->crtc_info[i].mode_set.crtc;
- ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
+ ret = drm_mode_set_config_internal(&fb_helper->crtc_info[i].mode_set);
if (ret) {
drm_modeset_unlock_all(dev);
return ret;
@@ -711,7 +711,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
modeset->y = var->yoffset;
if (modeset->num_connectors) {
- ret = crtc->funcs->set_config(modeset);
+ ret = drm_mode_set_config_internal(modeset);
if (!ret) {
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
diff --git a/drivers/gpu/drm/i2c/ch7006_drv.c b/drivers/gpu/drm/i2c/ch7006_drv.c
index 599099f..c5c947c 100644
--- a/drivers/gpu/drm/i2c/ch7006_drv.c
+++ b/drivers/gpu/drm/i2c/ch7006_drv.c
@@ -364,7 +364,7 @@ static int ch7006_encoder_set_property(struct drm_encoder *encoder,
.crtc = crtc,
};
- crtc->funcs->set_config(&modeset);
+ drm_mode_set_config_internal(&modeset);
}
}
diff --git a/drivers/gpu/drm/nouveau/nv04_display.c b/drivers/gpu/drm/nouveau/nv04_display.c
index 2cd6fb8..4c6e9f8 100644
--- a/drivers/gpu/drm/nouveau/nv04_display.c
+++ b/drivers/gpu/drm/nouveau/nv04_display.c
@@ -140,7 +140,7 @@ nv04_display_destroy(struct drm_device *dev)
.crtc = crtc,
};
- crtc->funcs->set_config(&modeset);
+ drm_mode_set_config_internal(&modeset);
}
/* Restore state */
diff --git a/drivers/gpu/drm/nouveau/nv17_tv.c b/drivers/gpu/drm/nouveau/nv17_tv.c
index 897b636..bb3abfc 100644
--- a/drivers/gpu/drm/nouveau/nv17_tv.c
+++ b/drivers/gpu/drm/nouveau/nv17_tv.c
@@ -768,7 +768,7 @@ static int nv17_tv_set_property(struct drm_encoder *encoder,
.crtc = crtc,
};
- crtc->funcs->set_config(&modeset);
+ drm_mode_set_config_internal(&modeset);
}
}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 91581fd..5e598f4 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -829,7 +829,7 @@ static void vmw_lastclose(struct drm_device *dev)
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
set.crtc = crtc;
- ret = crtc->funcs->set_config(&set);
+ ret = drm_mode_set_config_internal(&set);
WARN_ON(ret != 0);
}
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index b24ad78..e3ff0a3 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1022,6 +1022,7 @@ extern int drm_mode_getcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv);
extern int drm_mode_getconnector(struct drm_device *dev,
void *data, struct drm_file *file_priv);
+extern int drm_mode_set_config_internal(struct drm_mode_set *set);
extern int drm_mode_setcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv);
extern int drm_mode_getplane(struct drm_device *dev,
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 29/37] drm: refcounting for crtc framebuffers
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (20 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 28/37] drm: encapsulate crtc->set_config calls Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 30/37] drm/i915: dump refcount into framebuffer debugfs file Daniel Vetter
` (5 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
With the prep patch to encapsulate ->set_crtc calls, this is now
rather easy. Hooray for inconsistent semantics between ->set_crtc and
->page_flip, where the driver callback is supposed to update the fb
pointer, and ->update_plane, where the drm core does the same.
Also, since the drm core functions check crtc->fb before calling into
driver callbacks, we can't really reduce the critical sections
protected by the mode_config locks.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 37 ++++++++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 229853e..6562eba 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1983,8 +1983,21 @@ out:
int drm_mode_set_config_internal(struct drm_mode_set *set)
{
struct drm_crtc *crtc = set->crtc;
+ struct drm_framebuffer *fb, *old_fb;
+ int ret;
+
+ old_fb = crtc->fb;
+ fb = set->fb;
- return crtc->funcs->set_config(set);
+ ret = crtc->funcs->set_config(set);
+ if (ret == 0) {
+ if (old_fb)
+ drm_framebuffer_unreference(old_fb);
+ if (fb)
+ drm_framebuffer_reference(fb);
+ }
+
+ return ret;
}
EXPORT_SYMBOL(drm_mode_set_config_internal);
@@ -2045,6 +2058,8 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
goto out;
}
fb = crtc->fb;
+ /* Make refcounting symmetric with the lookup path. */
+ drm_framebuffer_reference(fb);
} else {
fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
if (!fb) {
@@ -2053,9 +2068,6 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
ret = -EINVAL;
goto out;
}
- /* fb is protect by the mode_config lock, so drop the
- * ref immediately */
- drm_framebuffer_unreference(fb);
}
mode = drm_mode_create(dev);
@@ -2155,6 +2167,9 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
ret = drm_mode_set_config_internal(&set);
out:
+ if (fb)
+ drm_framebuffer_unreference(fb);
+
kfree(connector_set);
drm_mode_destroy(dev, mode);
drm_modeset_unlock_all(dev);
@@ -3673,7 +3688,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
struct drm_mode_crtc_page_flip *page_flip = data;
struct drm_mode_object *obj;
struct drm_crtc *crtc;
- struct drm_framebuffer *fb;
+ struct drm_framebuffer *fb = NULL, *old_fb = NULL;
struct drm_pending_vblank_event *e = NULL;
unsigned long flags;
int hdisplay, vdisplay;
@@ -3704,8 +3719,6 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
if (!fb)
goto out;
- /* fb is protect by the mode_config lock, so drop the ref immediately */
- drm_framebuffer_unreference(fb);
hdisplay = crtc->mode.hdisplay;
vdisplay = crtc->mode.vdisplay;
@@ -3751,6 +3764,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
(void (*) (struct drm_pending_event *)) kfree;
}
+ old_fb = crtc->fb;
ret = crtc->funcs->page_flip(crtc, fb, e);
if (ret) {
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
@@ -3759,9 +3773,18 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
spin_unlock_irqrestore(&dev->event_lock, flags);
kfree(e);
}
+ /* Keep the old fb, don't unref it. */
+ old_fb = NULL;
+ } else {
+ /* Unref only the old framebuffer. */
+ fb = NULL;
}
out:
+ if (fb)
+ drm_framebuffer_unreference(fb);
+ if (old_fb)
+ drm_framebuffer_unreference(old_fb);
drm_modeset_unlock_all(dev);
return ret;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 30/37] drm/i915: dump refcount into framebuffer debugfs file
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (21 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 29/37] drm: refcounting for crtc framebuffers Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 32/37] drm: optimize drm_framebuffer_remove Daniel Vetter
` (4 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
Useful for checking whether the new refcounting works as advertised.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/i915/i915_debugfs.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index da1c8b6..e2dc77c 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1369,11 +1369,12 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
ifbdev = dev_priv->fbdev;
fb = to_intel_framebuffer(ifbdev->helper.fb);
- seq_printf(m, "fbcon size: %d x %d, depth %d, %d bpp, obj ",
+ seq_printf(m, "fbcon size: %d x %d, depth %d, %d bpp, refcount %d, obj ",
fb->base.width,
fb->base.height,
fb->base.depth,
- fb->base.bits_per_pixel);
+ fb->base.bits_per_pixel,
+ atomic_read(&fb->base.refcount.refcount));
describe_obj(m, fb->obj);
seq_printf(m, "\n");
mutex_unlock(&dev->mode_config.mutex);
@@ -1383,11 +1384,12 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
if (&fb->base == ifbdev->helper.fb)
continue;
- seq_printf(m, "user size: %d x %d, depth %d, %d bpp, obj ",
+ seq_printf(m, "user size: %d x %d, depth %d, %d bpp, refcount %d, obj ",
fb->base.width,
fb->base.height,
fb->base.depth,
- fb->base.bits_per_pixel);
+ fb->base.bits_per_pixel,
+ atomic_read(&fb->base.refcount.refcount));
describe_obj(m, fb->obj);
seq_printf(m, "\n");
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 32/37] drm: optimize drm_framebuffer_remove
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (22 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 30/37] drm/i915: dump refcount into framebuffer debugfs file Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
` (3 subsequent siblings)
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Now that all framebuffer usage is properly refcounted, we are no
longer required to hold the modeset locks while dropping the last
reference. Hence implemented a fastpath which avoids the potential
stalls associated with grabbing mode_config.lock for the case where
there's no other reference around.
Explain in a big comment why it is safe. Also update kerneldocs with
the new locking rules around drm_framebuffer_remove.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 72 +++++++++++++++++++++++++++-----------------
1 file changed, 45 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 6562eba..6dd441c 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -516,7 +516,11 @@ EXPORT_SYMBOL(drm_framebuffer_cleanup);
*
* Scans all the CRTCs and planes in @dev's mode_config. If they're
* using @fb, removes it, setting it to NULL. Then drops the reference to the
- * passed-in framebuffer.
+ * passed-in framebuffer. Might take the modeset locks.
+ *
+ * Note that this function optimizes the cleanup away if the caller holds the
+ * last reference to the framebuffer. It is also guaranteed to not take the
+ * modeset locks in this case.
*/
void drm_framebuffer_remove(struct drm_framebuffer *fb)
{
@@ -526,33 +530,51 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
struct drm_mode_set set;
int ret;
- WARN_ON(!drm_modeset_is_locked(dev));
WARN_ON(!list_empty(&fb->filp_head));
- /* remove from any CRTC */
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
- if (crtc->fb == fb) {
- /* should turn off the crtc */
- memset(&set, 0, sizeof(struct drm_mode_set));
- set.crtc = crtc;
- set.fb = NULL;
- ret = drm_mode_set_config_internal(&set);
- if (ret)
- DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
+ /*
+ * drm ABI mandates that we remove any deleted framebuffers from active
+ * useage. But since most sane clients only remove framebuffers they no
+ * longer need, try to optimize this away.
+ *
+ * Since we're holding a reference ourselves, observing a refcount of 1
+ * means that we're the last holder and can skip it. Also, the refcount
+ * can never increase from 1 again, so we don't need any barriers or
+ * locks.
+ *
+ * Note that userspace could try to race with use and instate a new
+ * usage _after_ we've cleared all current ones. End result will be an
+ * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
+ * in this manner.
+ */
+ if (atomic_read(&fb->refcount.refcount) > 1) {
+ drm_modeset_lock_all(dev);
+ /* remove from any CRTC */
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ if (crtc->fb == fb) {
+ /* should turn off the crtc */
+ memset(&set, 0, sizeof(struct drm_mode_set));
+ set.crtc = crtc;
+ set.fb = NULL;
+ ret = drm_mode_set_config_internal(&set);
+ if (ret)
+ DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
+ }
}
- }
- list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
- if (plane->fb == fb) {
- /* should turn off the crtc */
- ret = plane->funcs->disable_plane(plane);
- if (ret)
- DRM_ERROR("failed to disable plane with busy fb\n");
- /* disconnect the plane from the fb and crtc: */
- __drm_framebuffer_unreference(plane->fb);
- plane->fb = NULL;
- plane->crtc = NULL;
+ list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
+ if (plane->fb == fb) {
+ /* should turn off the crtc */
+ ret = plane->funcs->disable_plane(plane);
+ if (ret)
+ DRM_ERROR("failed to disable plane with busy fb\n");
+ /* disconnect the plane from the fb and crtc: */
+ __drm_framebuffer_unreference(plane->fb);
+ plane->fb = NULL;
+ plane->crtc = NULL;
+ }
}
+ drm_modeset_unlock_all(dev);
}
drm_framebuffer_unreference(fb);
@@ -2537,9 +2559,7 @@ int drm_mode_rmfb(struct drm_device *dev,
mutex_unlock(&dev->mode_config.fb_lock);
mutex_unlock(&file_priv->fbs_lock);
- drm_modeset_lock_all(dev);
drm_framebuffer_remove(fb);
- drm_modeset_unlock_all(dev);
return 0;
@@ -2687,9 +2707,7 @@ void drm_fb_release(struct drm_file *priv)
list_del_init(&fb->filp_head);
/* This will also drop the fpriv->fbs reference. */
- drm_modeset_lock_all(dev);
drm_framebuffer_remove(fb);
- drm_modeset_unlock_all(dev);
}
mutex_unlock(&priv->fbs_lock);
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (23 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 32/37] drm: optimize drm_framebuffer_remove Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 14:48 ` Jerome Glisse
` (3 more replies)
2012-12-12 13:07 ` [PATCH 35/37] drm/radeon: fix fence locking in the pageflip callback Daniel Vetter
` (2 subsequent siblings)
27 siblings, 4 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
Noticed while reviewing the fence locking in the radone pageflip
handler.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/ttm/ttm_bo_util.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index b9c4e51..5c8b207 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -441,7 +441,9 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
fbo->vm_node = NULL;
atomic_set(&fbo->cpu_writers, 0);
+ spin_lock(&bdev->fence_lock);
fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
+ spin_unlock(&bdev->fence_lock);
kref_init(&fbo->list_kref);
kref_init(&fbo->kref);
fbo->destroy = &ttm_transfered_destroy;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* Re: [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer
2012-12-12 13:07 ` [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
@ 2012-12-12 14:48 ` Jerome Glisse
[not found] ` <CAH3drwbL34+omj2S3ArOPgoYRQ3uzPEiRPFLn7YkP3cOMnPiZg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-12-13 11:06 ` [PATCH] allow shmob+imx drm drivers to be compiled Daniel Vetter
` (2 subsequent siblings)
3 siblings, 1 reply; 59+ messages in thread
From: Jerome Glisse @ 2012-12-12 14:48 UTC (permalink / raw)
To: Daniel Vetter
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, DRI Development
On Wed, Dec 12, 2012 at 8:07 AM, Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
> Noticed while reviewing the fence locking in the radone pageflip
> handler.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
> drivers/gpu/drm/ttm/ttm_bo_util.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> index b9c4e51..5c8b207 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> @@ -441,7 +441,9 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
> fbo->vm_node = NULL;
> atomic_set(&fbo->cpu_writers, 0);
>
> + spin_lock(&bdev->fence_lock);
> fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
> + spin_unlock(&bdev->fence_lock);
> kref_init(&fbo->list_kref);
> kref_init(&fbo->kref);
> fbo->destroy = &ttm_transfered_destroy;
> --
Instead of that i would just move the call to
ttm_buffer_object_transfer to happen before releasing the fence_lock
in ttm_bo_move_accel_cleanup , something like :
set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
ret = ttm_buffer_object_transfer(bo, &ghost_obj);
spin_unlock(&bdev->fence_lock);
if (tmp_obj)
driver->sync_obj_unref(&tmp_obj);
if (ret)
return ret;
Cheers,
Jerome
^ permalink raw reply [flat|nested] 59+ messages in thread* [PATCH] allow shmob+imx drm drivers to be compiled
2012-12-12 13:07 ` [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
2012-12-12 14:48 ` Jerome Glisse
@ 2012-12-13 11:06 ` Daniel Vetter
2012-12-13 11:18 ` Daniel Vetter
2012-12-13 11:26 ` [PATCH] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
3 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-13 11:06 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Daniel Vetter
---
drivers/gpu/drm/shmobile/Kconfig | 2 +-
drivers/staging/imx-drm/Kconfig | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/shmobile/Kconfig b/drivers/gpu/drm/shmobile/Kconfig
index 7e7d52b..1cf8566 100644
--- a/drivers/gpu/drm/shmobile/Kconfig
+++ b/drivers/gpu/drm/shmobile/Kconfig
@@ -1,6 +1,6 @@
config DRM_SHMOBILE
tristate "DRM Support for SH Mobile"
- depends on DRM && (SUPERH || ARCH_SHMOBILE)
+ #depends on DRM && (SUPERH || ARCH_SHMOBILE)
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_GEM_CMA_HELPER
diff --git a/drivers/staging/imx-drm/Kconfig b/drivers/staging/imx-drm/Kconfig
index 14b4449..266cc35 100644
--- a/drivers/staging/imx-drm/Kconfig
+++ b/drivers/staging/imx-drm/Kconfig
@@ -3,7 +3,7 @@ config DRM_IMX
select DRM_KMS_HELPER
select DRM_GEM_CMA_HELPER
select DRM_KMS_CMA_HELPER
- depends on DRM && ARCH_MXC
+ #depends on DRM && ARCH_MXC
help
enable i.MX graphics support
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread
* [PATCH] allow shmob+imx drm drivers to be compiled
2012-12-12 13:07 ` [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
2012-12-12 14:48 ` Jerome Glisse
2012-12-13 11:06 ` [PATCH] allow shmob+imx drm drivers to be compiled Daniel Vetter
@ 2012-12-13 11:18 ` Daniel Vetter
2012-12-13 11:26 ` [PATCH] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
3 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-13 11:18 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Daniel Vetter
---
drivers/gpu/drm/shmobile/Kconfig | 2 +-
drivers/staging/imx-drm/Kconfig | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/shmobile/Kconfig b/drivers/gpu/drm/shmobile/Kconfig
index 7e7d52b..1cf8566 100644
--- a/drivers/gpu/drm/shmobile/Kconfig
+++ b/drivers/gpu/drm/shmobile/Kconfig
@@ -1,6 +1,6 @@
config DRM_SHMOBILE
tristate "DRM Support for SH Mobile"
- depends on DRM && (SUPERH || ARCH_SHMOBILE)
+ #depends on DRM && (SUPERH || ARCH_SHMOBILE)
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_GEM_CMA_HELPER
diff --git a/drivers/staging/imx-drm/Kconfig b/drivers/staging/imx-drm/Kconfig
index 14b4449..266cc35 100644
--- a/drivers/staging/imx-drm/Kconfig
+++ b/drivers/staging/imx-drm/Kconfig
@@ -3,7 +3,7 @@ config DRM_IMX
select DRM_KMS_HELPER
select DRM_GEM_CMA_HELPER
select DRM_KMS_CMA_HELPER
- depends on DRM && ARCH_MXC
+ #depends on DRM && ARCH_MXC
help
enable i.MX graphics support
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread
* [PATCH] drm/ttm: fix fence locking in ttm_buffer_object_transfer
2012-12-12 13:07 ` [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
` (2 preceding siblings ...)
2012-12-13 11:18 ` Daniel Vetter
@ 2012-12-13 11:26 ` Daniel Vetter
3 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-13 11:26 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Daniel Vetter
Noticed while reviewing the fence locking in the radeon pageflip
handler.
v2: Instead of grabbing the bdev->fence_lock in object_transfer just
move the single callsite of that function a few lines, so that it is
protected by the fence_lock. Suggested by Jerome Glisse.
v3: Fix typo in commit message.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/ttm/ttm_bo_util.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index b9c4e51..c5d83a5 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -654,11 +654,13 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
*/
set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
+
+ /* ttm_buffer_object_transfer accesses bo->sync_obj */
+ ret = ttm_buffer_object_transfer(bo, &ghost_obj);
spin_unlock(&bdev->fence_lock);
if (tmp_obj)
driver->sync_obj_unref(&tmp_obj);
- ret = ttm_buffer_object_transfer(bo, &ghost_obj);
if (ret)
return ret;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread
* [PATCH 35/37] drm/radeon: fix fence locking in the pageflip callback
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (24 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 34/37] drm/ttm: fix fence locking in ttm_buffer_object_transfer Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 36/37] drm: only grab the crtc lock for pageflips Daniel Vetter
2012-12-12 13:07 ` [PATCH 37/37] drm: don't hold crtc mutexes for connector ->detect callbacks Daniel Vetter
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
We need to hold bdev->fence_lock while grabbing a reference to
the fence, to prevent concurrent clearing/changing of the
ttm_bo->sync_obj field.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/radeon/radeon_display.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 8724196..069d5cc 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -378,8 +378,12 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
work->old_rbo = rbo;
obj = new_radeon_fb->obj;
rbo = gem_to_radeon_bo(obj);
+
+ spin_lock(&rbo->tbo.bdev->fence_lock);
if (rbo->tbo.sync_obj)
work->fence = radeon_fence_ref(rbo->tbo.sync_obj);
+ spin_unlock(&rbo->tbo.bdev->fence_lock);
+
INIT_WORK(&work->work, radeon_unpin_work_func);
/* We borrow the event spin lock for protecting unpin_work */
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 36/37] drm: only grab the crtc lock for pageflips
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (25 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 35/37] drm/radeon: fix fence locking in the pageflip callback Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
2012-12-12 13:07 ` [PATCH 37/37] drm: don't hold crtc mutexes for connector ->detect callbacks Daniel Vetter
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development
Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev, Daniel Vetter
The pagelip ioctl itself is rather simply, so the hard work for this
patch is auditing all the drivers:
- exynos: Pageflip is protect with dev->struct_mutex and ...
synchronous. But nothing fancy going on, besides a check whether the
crtc is enabled, which should probably be somewhere in the drm core
so that we have unified behaviour across all drivers.
- i915: hw-state is protected with dev->struct_mutex, the delayed
unpin work together with the other stuff the pageflip complete irq
handler needs is protected by the event_lock spinlock.
- nouveau: With the pin/unpin functions fixed, everything looks safe:
A bit of ttm wrestling and refcounting, and a few channel accesses.
The later are either already proteced sufficiently, or are now safe
with the channel locking introduced to make cursor updates safe.
- radeon: The irq_get/put functions look a bit race, since the
atomic_inc/dec isn't protect with locks. Otoh they're all per-crtc,
so we should be safe with per-crtc locking from the drm core. Then
there's tons of per-crtc register access, which could potentially go
through the indirect reg acces. But that's fixed to make cursor
updates concurrent. Bookeeping for the drm even is also protected
with the even_lock, which also protects against the pageflip irq
handler since radeon hw seems to have no way to queue these up
asynchronously. Otherwise just a bit of ttm-based buffer handling
and fencing, which is now safe with the previous patch to hold
bdev->fence_lock while grabbing the ttm fence.
- shmob: Only one crtc. That's an easy one ...
- vmwgfx: As usual a bit special with tons different things:
- Flippable check using is_implicit and num_implicit. Changes to
those seem to be nicely covered with the global modeset lock, so
we should be fine.
- Some dirty cliprect handling stuff, or at least that is my guess.
Looks like it's fine since either it's per-crtc, invariant or
(like the execbuf stuff launched) protected otherwise.
- Adding the actual flip to the fence_event list. On a quick look
this seems to have solid locking in place, too.
... but generally this is all way over my head.
- imx: Impressive display of races between the page_flip
implementation and the irq handler. Also, ipu_drm_set_base which
gets eventually called from the irq handler to update the display
base isn't really protected against concurrent set_config calls from
process context. In any case, going for per-crtc locking won't make
this worse, so nothing to do.
- omap: Does just some prep work on per-crtc data and grabs a ref on
the backing storage, then calls down into omap_gem_op_async which
does some nicely-protected async callback stuff, or directly calls
the passed-in page_flip_cb. That seems to lock most of the stuff it
touches properly, safe for the eventually called omap_plane_dpms,
which updates modeset state. Which will be a problem if this is
called asynchronously, since the sync_op waiter callback code in
omap_gem.c does not seem to take the right modeset locks. So looks a
bit racy already with the old locking, and no worse off with the new
per-crtc locks.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 6dd441c..36c75e6 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3716,12 +3716,12 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
page_flip->reserved != 0)
return -EINVAL;
- drm_modeset_lock_all(dev);
obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
if (!obj)
- goto out;
+ return -EINVAL;
crtc = obj_to_crtc(obj);
+ mutex_lock(&crtc->mutex);
if (crtc->fb == NULL) {
/* The framebuffer is currently unbound, presumably
* due to a hotplug event, that userspace has not
@@ -3803,7 +3803,8 @@ out:
drm_framebuffer_unreference(fb);
if (old_fb)
drm_framebuffer_unreference(old_fb);
- drm_modeset_unlock_all(dev);
+ mutex_unlock(&crtc->mutex);
+
return ret;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 59+ messages in thread* [PATCH 37/37] drm: don't hold crtc mutexes for connector ->detect callbacks
[not found] ` <1355317637-16742-1-git-send-email-daniel.vetter-/w4YWyX8dFk@public.gmane.org>
` (26 preceding siblings ...)
2012-12-12 13:07 ` [PATCH 36/37] drm: only grab the crtc lock for pageflips Daniel Vetter
@ 2012-12-12 13:07 ` Daniel Vetter
27 siblings, 0 replies; 59+ messages in thread
From: Daniel Vetter @ 2012-12-12 13:07 UTC (permalink / raw)
To: DRI Development; +Cc: Nouveau Dev, Intel Graphics Development, Radeon Dev
The coup de grace of the entire journey. No more dropped frames every
10s on my testbox!
I've tried to audit all ->detect and ->get_modes callbacks, but things
became a bit fuzzy after trying to piece together the umpteenth
implemenation. Afaict most drivers just have bog-standard output
register frobbing with a notch of i2c edid reading, nothing which
could potentially race with the newly concurrent pageflip/set_cursor
code. The big exception is load-detection code which requires a
running pipe, but radeon/nouveau seem to to this without touching any
state which can be observed from page_flip (e.g. disabled crtcs
temporarily getting enabled and so a pageflip succeeding).
The only special case I could find is the i915 load detect code. That
uses the normal modeset interface to enable the load-detect crtc, and
so userspace could try to squeeze in a pageflip on the load-detect
pipe. So we need to grab the relevant crtc mutex in there, to avoid
the temporary crtc enabling to sneak out and be visible to userspace.
Note that the sysfs files already stopped grabbing the per-crtc locks,
since I didn't want to bother with doing a interruptible
modeset_lock_all. But since there's very little in-between breakage
(essentially just the ability for userspace to pageflip on load-detect
crtcs when it shouldn't on the i915 driver) I figured I don't need to
bother.
Signed-off-by: Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>
---
drivers/gpu/drm/drm_crtc.c | 5 +++--
drivers/gpu/drm/drm_crtc_helper.c | 8 ++++----
drivers/gpu/drm/i915/intel_display.c | 10 ++++++++--
3 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 36c75e6..313d7d2 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1616,7 +1616,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
- drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.mutex);
obj = drm_mode_object_find(dev, out_resp->connector_id,
DRM_MODE_OBJECT_CONNECTOR);
@@ -1713,7 +1713,8 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out_resp->count_encoders = encoders_count;
out:
- drm_modeset_unlock_all(dev);
+ mutex_unlock(&dev->mode_config.mutex);
+
return ret;
}
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 400ef86..7b2d378 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -980,7 +980,7 @@ static void output_poll_execute(struct work_struct *work)
if (!drm_kms_helper_poll)
return;
- drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.mutex);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
/* Ignore forced connectors. */
@@ -1010,7 +1010,7 @@ static void output_poll_execute(struct work_struct *work)
changed = true;
}
- drm_modeset_unlock_all(dev);
+ mutex_unlock(&dev->mode_config.mutex);
if (changed)
drm_kms_helper_hotplug_event(dev);
@@ -1070,7 +1070,7 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
if (!dev->mode_config.poll_enabled)
return;
- drm_modeset_lock_all(dev);
+ mutex_lock(&dev->mode_config.mutex);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
/* Only handle HPD capable connectors. */
@@ -1088,7 +1088,7 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
changed = true;
}
- drm_modeset_unlock_all(dev);
+ mutex_unlock(&dev->mode_config.mutex);
if (changed)
drm_kms_helper_hotplug_event(dev);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fd8cfeb..2429d39 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6390,6 +6390,8 @@ bool intel_get_load_detect_pipe(struct drm_connector *connector,
if (encoder->crtc) {
crtc = encoder->crtc;
+ mutex_lock(&crtc->mutex);
+
old->dpms_mode = connector->dpms;
old->load_detect_temp = false;
@@ -6419,6 +6421,7 @@ bool intel_get_load_detect_pipe(struct drm_connector *connector,
return false;
}
+ mutex_lock(&crtc->mutex);
intel_encoder->new_crtc = to_intel_crtc(crtc);
to_intel_connector(connector)->new_encoder = intel_encoder;
@@ -6446,6 +6449,7 @@ bool intel_get_load_detect_pipe(struct drm_connector *connector,
DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
if (IS_ERR(fb)) {
DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
+ mutex_unlock(&crtc->mutex);
return false;
}
@@ -6453,6 +6457,7 @@ bool intel_get_load_detect_pipe(struct drm_connector *connector,
DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
if (old->release_fb)
old->release_fb->funcs->destroy(old->release_fb);
+ mutex_unlock(&crtc->mutex);
return false;
}
@@ -6467,14 +6472,13 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
struct intel_encoder *intel_encoder =
intel_attached_encoder(connector);
struct drm_encoder *encoder = &intel_encoder->base;
+ struct drm_crtc *crtc = encoder->crtc;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
connector->base.id, drm_get_connector_name(connector),
encoder->base.id, drm_get_encoder_name(encoder));
if (old->load_detect_temp) {
- struct drm_crtc *crtc = encoder->crtc;
-
to_intel_connector(connector)->new_encoder = NULL;
intel_encoder->new_crtc = NULL;
intel_set_mode(crtc, NULL, 0, 0, NULL);
@@ -6490,6 +6494,8 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
/* Switch crtc and encoder back off if necessary */
if (old->dpms_mode != DRM_MODE_DPMS_ON)
connector->funcs->dpms(connector, old->dpms_mode);
+
+ mutex_unlock(&crtc->mutex);
}
/* Returns the clock of the currently programmed mode of the given pipe. */
--
1.7.10.4
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