drm: add drm_modeset_lock|unlock_all
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.
v2: Fixup kerneldoc for unlock_all.
Reviewed-by: Rob Clark <rob@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 7ca2f28..a82ec05 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
+ * @dev: 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) \
@@ -425,7 +448,7 @@
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)
@@ -437,7 +460,7 @@
dev->mode_config.num_crtc++;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -512,7 +535,7 @@
{
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)
@@ -542,7 +565,7 @@
dev->mode_config.dpms_property, 0);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -592,7 +615,7 @@
{
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)
@@ -606,7 +629,7 @@
dev->mode_config.num_encoder++;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -615,11 +638,11 @@
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);
@@ -631,7 +654,7 @@
{
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)
@@ -665,7 +688,7 @@
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -675,7 +698,7 @@
{
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 */
@@ -683,7 +706,7 @@
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);
@@ -963,9 +986,9 @@
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;
@@ -1185,7 +1208,7 @@
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
@@ -1327,7 +1350,7 @@
card_res->count_connectors, card_res->count_encoders);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1355,7 +1378,7 @@
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);
@@ -1383,7 +1406,7 @@
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1426,7 +1449,7 @@
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);
@@ -1523,7 +1546,7 @@
out_resp->count_encoders = encoders_count;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1538,7 +1561,7 @@
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) {
@@ -1557,7 +1580,7 @@
enc_resp->possible_clones = encoder->possible_clones;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1581,7 +1604,7 @@
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;
/*
@@ -1603,7 +1626,7 @@
plane_resp->count_planes = config->num_plane;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1628,7 +1651,7 @@
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) {
@@ -1668,7 +1691,7 @@
plane_resp->count_format_types = plane->format_count;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1696,7 +1719,7 @@
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,
@@ -1795,7 +1818,7 @@
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -1850,7 +1873,7 @@
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) {
@@ -1983,7 +2006,7 @@
out:
kfree(connector_set);
drm_mode_destroy(dev, mode);
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2001,7 +2024,7 @@
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);
@@ -2029,7 +2052,7 @@
}
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2108,7 +2131,7 @@
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 */
@@ -2125,7 +2148,7 @@
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2293,7 +2316,7 @@
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)) {
@@ -2307,7 +2330,7 @@
DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2337,7 +2360,7 @@
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) {
@@ -2358,7 +2381,7 @@
drm_framebuffer_remove(fb);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2386,7 +2409,7 @@
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;
@@ -2405,7 +2428,7 @@
ret = -ENODEV;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2424,7 +2447,7 @@
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;
@@ -2478,7 +2501,7 @@
out_err2:
kfree(clips);
out_err1:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2499,11 +2522,11 @@
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);
}
/**
@@ -2618,7 +2641,7 @@
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) {
@@ -2642,7 +2665,7 @@
drm_mode_attachmode(dev, connector, mode);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2671,7 +2694,7 @@
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) {
@@ -2688,7 +2711,7 @@
ret = drm_mode_detachmode(dev, connector, &mode);
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -2934,7 +2957,7 @@
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;
@@ -3012,7 +3035,7 @@
out_resp->count_enum_blobs = blob_count;
}
done:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3063,7 +3086,7 @@
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;
@@ -3081,7 +3104,7 @@
out_resp->length = blob->length;
done:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3223,7 +3246,7 @@
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) {
@@ -3260,7 +3283,7 @@
}
arg->count_props = props_count;
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3277,7 +3300,7 @@
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)
@@ -3315,7 +3338,7 @@
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3377,7 +3400,7 @@
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;
@@ -3418,7 +3441,7 @@
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;
}
@@ -3436,7 +3459,7 @@
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;
@@ -3469,7 +3492,7 @@
goto out;
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}
@@ -3489,7 +3512,7 @@
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;
@@ -3567,7 +3590,7 @@
}
out:
- mutex_unlock(&dev->mode_config.mutex);
+ drm_modeset_unlock_all(dev);
return ret;
}