[RFC PATCH v2 3/3] drm: initialize accel framework
Oded Gabbay
ogabbay at kernel.org
Wed Nov 2 20:34:05 UTC 2022
Now that we have the accel framework code ready, let's call the
accel functions from all the appropriate places. These places are the
drm module init/exit functions, and all the drm_minor handling
functions.
Signed-off-by: Oded Gabbay <ogabbay at kernel.org>
---
drivers/gpu/drm/drm_drv.c | 98 ++++++++++++++++++++++++++++---------
drivers/gpu/drm/drm_sysfs.c | 24 ++++++---
2 files changed, 90 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 8214a0b1ab7f..c8ea57a974b7 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -35,6 +35,7 @@
#include <linux/slab.h>
#include <linux/srcu.h>
+#include <drm/drm_accel.h>
#include <drm/drm_cache.h>
#include <drm/drm_client.h>
#include <drm/drm_color_mgmt.h>
@@ -90,6 +91,8 @@ static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
return &dev->primary;
case DRM_MINOR_RENDER:
return &dev->render;
+ case DRM_MINOR_ACCEL:
+ return &dev->accel;
default:
BUG();
}
@@ -104,9 +107,13 @@ static void drm_minor_alloc_release(struct drm_device *dev, void *data)
put_device(minor->kdev);
- spin_lock_irqsave(&drm_minor_lock, flags);
- idr_remove(&drm_minors_idr, minor->index);
- spin_unlock_irqrestore(&drm_minor_lock, flags);
+ if (minor->type == DRM_MINOR_ACCEL) {
+ accel_minor_remove(minor->index);
+ } else {
+ spin_lock_irqsave(&drm_minor_lock, flags);
+ idr_remove(&drm_minors_idr, minor->index);
+ spin_unlock_irqrestore(&drm_minor_lock, flags);
+ }
}
static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
@@ -123,13 +130,17 @@ static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
minor->dev = dev;
idr_preload(GFP_KERNEL);
- spin_lock_irqsave(&drm_minor_lock, flags);
- r = idr_alloc(&drm_minors_idr,
- NULL,
- 64 * type,
- 64 * (type + 1),
- GFP_NOWAIT);
- spin_unlock_irqrestore(&drm_minor_lock, flags);
+ if (type == DRM_MINOR_ACCEL) {
+ r = accel_minor_alloc();
+ } else {
+ spin_lock_irqsave(&drm_minor_lock, flags);
+ r = idr_alloc(&drm_minors_idr,
+ NULL,
+ 64 * type,
+ 64 * (type + 1),
+ GFP_NOWAIT);
+ spin_unlock_irqrestore(&drm_minor_lock, flags);
+ }
idr_preload_end();
if (r < 0)
@@ -163,7 +174,11 @@ static int drm_minor_register(struct drm_device *dev, unsigned int type)
ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root);
if (ret) {
- DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
+ if (minor->type == DRM_MINOR_ACCEL)
+ DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/accel.\n");
+ else
+ DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
+
goto err_debugfs;
}
@@ -172,9 +187,15 @@ static int drm_minor_register(struct drm_device *dev, unsigned int type)
goto err_debugfs;
/* replace NULL with @minor so lookups will succeed from now on */
- spin_lock_irqsave(&drm_minor_lock, flags);
- idr_replace(&drm_minors_idr, minor, minor->index);
- spin_unlock_irqrestore(&drm_minor_lock, flags);
+ if (minor->type == DRM_MINOR_ACCEL) {
+ ret = accel_minor_replace(minor, minor->index);
+ if (ret < 0)
+ goto err_debugfs;
+ } else {
+ spin_lock_irqsave(&drm_minor_lock, flags);
+ idr_replace(&drm_minors_idr, minor, minor->index);
+ spin_unlock_irqrestore(&drm_minor_lock, flags);
+ }
DRM_DEBUG("new minor registered %d\n", minor->index);
return 0;
@@ -194,9 +215,13 @@ static void drm_minor_unregister(struct drm_device *dev, unsigned int type)
return;
/* replace @minor with NULL so lookups will fail from now on */
- spin_lock_irqsave(&drm_minor_lock, flags);
- idr_replace(&drm_minors_idr, NULL, minor->index);
- spin_unlock_irqrestore(&drm_minor_lock, flags);
+ if (minor->type == DRM_MINOR_ACCEL) {
+ accel_minor_replace(NULL, minor->index);
+ } else {
+ spin_lock_irqsave(&drm_minor_lock, flags);
+ idr_replace(&drm_minors_idr, NULL, minor->index);
+ spin_unlock_irqrestore(&drm_minor_lock, flags);
+ }
device_del(minor->kdev);
dev_set_drvdata(minor->kdev, NULL); /* safety belt */
@@ -603,6 +628,14 @@ static int drm_dev_init(struct drm_device *dev,
/* no per-device feature limits by default */
dev->driver_features = ~0u;
+ if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL) &&
+ (drm_core_check_feature(dev, DRIVER_RENDER) ||
+ drm_core_check_feature(dev, DRIVER_MODESET))) {
+
+ DRM_ERROR("DRM driver can't be both a compute acceleration and graphics driver\n");
+ return -EINVAL;
+ }
+
drm_legacy_init_members(dev);
INIT_LIST_HEAD(&dev->filelist);
INIT_LIST_HEAD(&dev->filelist_internal);
@@ -628,15 +661,21 @@ static int drm_dev_init(struct drm_device *dev,
dev->anon_inode = inode;
- if (drm_core_check_feature(dev, DRIVER_RENDER)) {
- ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
+ if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL)) {
+ ret = drm_minor_alloc(dev, DRM_MINOR_ACCEL);
if (ret)
goto err;
- }
+ } else {
+ if (drm_core_check_feature(dev, DRIVER_RENDER)) {
+ ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
+ if (ret)
+ goto err;
+ }
- ret = drm_minor_alloc(dev, DRM_MINOR_PRIMARY);
- if (ret)
- goto err;
+ ret = drm_minor_alloc(dev, DRM_MINOR_PRIMARY);
+ if (ret)
+ goto err;
+ }
ret = drm_legacy_create_map_hash(dev);
if (ret)
@@ -883,6 +922,10 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
if (ret)
goto err_minors;
+ ret = drm_minor_register(dev, DRM_MINOR_ACCEL);
+ if (ret)
+ goto err_minors;
+
ret = create_compat_control_link(dev);
if (ret)
goto err_minors;
@@ -902,12 +945,13 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
driver->name, driver->major, driver->minor,
driver->patchlevel, driver->date,
dev->dev ? dev_name(dev->dev) : "virtual device",
- dev->primary->index);
+ dev->primary ? dev->primary->index : dev->accel->index);
goto out_unlock;
err_minors:
remove_compat_control_link(dev);
+ drm_minor_unregister(dev, DRM_MINOR_ACCEL);
drm_minor_unregister(dev, DRM_MINOR_PRIMARY);
drm_minor_unregister(dev, DRM_MINOR_RENDER);
out_unlock:
@@ -950,6 +994,7 @@ void drm_dev_unregister(struct drm_device *dev)
drm_legacy_rmmaps(dev);
remove_compat_control_link(dev);
+ drm_minor_unregister(dev, DRM_MINOR_ACCEL);
drm_minor_unregister(dev, DRM_MINOR_PRIMARY);
drm_minor_unregister(dev, DRM_MINOR_RENDER);
}
@@ -1034,6 +1079,7 @@ static const struct file_operations drm_stub_fops = {
static void drm_core_exit(void)
{
drm_privacy_screen_lookup_exit();
+ accel_core_exit();
unregister_chrdev(DRM_MAJOR, "drm");
debugfs_remove(drm_debugfs_root);
drm_sysfs_destroy();
@@ -1061,6 +1107,10 @@ static int __init drm_core_init(void)
if (ret < 0)
goto error;
+ ret = accel_core_init();
+ if (ret < 0)
+ goto error;
+
drm_privacy_screen_lookup_init();
drm_core_init_complete = true;
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 430e00b16eec..b8da978d85bb 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -19,6 +19,7 @@
#include <linux/kdev_t.h>
#include <linux/slab.h>
+#include <drm/drm_accel.h>
#include <drm/drm_connector.h>
#include <drm/drm_device.h>
#include <drm/drm_file.h>
@@ -471,19 +472,26 @@ struct device *drm_sysfs_minor_alloc(struct drm_minor *minor)
struct device *kdev;
int r;
- if (minor->type == DRM_MINOR_RENDER)
- minor_str = "renderD%d";
- else
- minor_str = "card%d";
-
kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
if (!kdev)
return ERR_PTR(-ENOMEM);
device_initialize(kdev);
- kdev->devt = MKDEV(DRM_MAJOR, minor->index);
- kdev->class = drm_class;
- kdev->type = &drm_sysfs_device_minor;
+
+ if (minor->type == DRM_MINOR_ACCEL) {
+ minor_str = "accel%d";
+ accel_set_device_instance_params(kdev, minor->index);
+ } else {
+ if (minor->type == DRM_MINOR_RENDER)
+ minor_str = "renderD%d";
+ else
+ minor_str = "card%d";
+
+ kdev->devt = MKDEV(DRM_MAJOR, minor->index);
+ kdev->class = drm_class;
+ kdev->type = &drm_sysfs_device_minor;
+ }
+
kdev->parent = minor->dev->dev;
kdev->release = drm_sysfs_release;
dev_set_drvdata(kdev, minor);
--
2.25.1
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