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drm/panthor: Add DEV_QUERY_GROUP_PRIORITIES_INFO dev query

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Expose allowed group priorities with a new device query.

This new uAPI will be used in Mesa to properly report what priorities a
user can use for EGL_IMG_context_priority.

Since this extends the uAPI and because userland needs a way to
advertise priorities accordingly, this also bumps the driver minor
version.

v2:
- Remove drm_panthor_group_allow_priority_flags definition
- Document that allowed_mask is a bitmask of drm_panthor_group_priority

v3:
- Use BIT macro in panthor_query_group_priorities_info
- Add r-b from Steven Price and Boris Brezillon

Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240909064820.34982-4-mary.guillemard@collabora.com
This commit is contained in:
Mary Guillemard 2024-09-09 08:48:21 +02:00 committed by Steven Price
parent f73716fd45
commit f70000ef23
2 changed files with 64 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
drivers/gpu/drm/panthor/panthor_drv.c
View File

@ -170,6 +170,7 @@ panthor_get_uobj_array(const struct drm_panthor_obj_array *in, u32 min_stride,
PANTHOR_UOBJ_DECL(struct drm_panthor_gpu_info, tiler_present), \
PANTHOR_UOBJ_DECL(struct drm_panthor_csif_info, pad), \
PANTHOR_UOBJ_DECL(struct drm_panthor_timestamp_info, current_timestamp), \
PANTHOR_UOBJ_DECL(struct drm_panthor_group_priorities_info, pad), \
PANTHOR_UOBJ_DECL(struct drm_panthor_sync_op, timeline_value), \
PANTHOR_UOBJ_DECL(struct drm_panthor_queue_submit, syncs), \
PANTHOR_UOBJ_DECL(struct drm_panthor_queue_create, ringbuf_size), \
@ -777,11 +778,41 @@ static int panthor_query_timestamp_info(struct panthor_device *ptdev,
return 0;
}
static int group_priority_permit(struct drm_file *file,
u8 priority)
{
/* Ensure that priority is valid */
if (priority > PANTHOR_GROUP_PRIORITY_REALTIME)
return -EINVAL;
/* Medium priority and below are always allowed */
if (priority <= PANTHOR_GROUP_PRIORITY_MEDIUM)
return 0;
/* Higher priorities require CAP_SYS_NICE or DRM_MASTER */
if (capable(CAP_SYS_NICE) || drm_is_current_master(file))
return 0;
return -EACCES;
}
static void panthor_query_group_priorities_info(struct drm_file *file,
struct drm_panthor_group_priorities_info *arg)
{
int prio;
for (prio = PANTHOR_GROUP_PRIORITY_REALTIME; prio >= 0; prio--) {
if (!group_priority_permit(file, prio))
arg->allowed_mask |= BIT(prio);
}
}
static int panthor_ioctl_dev_query(struct drm_device *ddev, void *data, struct drm_file *file)
{
struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base);
struct drm_panthor_dev_query *args = data;
struct drm_panthor_timestamp_info timestamp_info;
struct drm_panthor_group_priorities_info priorities_info;
int ret;
if (!args->pointer) {
@ -798,6 +829,10 @@ static int panthor_ioctl_dev_query(struct drm_device *ddev, void *data, struct d
args->size = sizeof(timestamp_info);
return 0;
case DRM_PANTHOR_DEV_QUERY_GROUP_PRIORITIES_INFO:
args->size = sizeof(priorities_info);
return 0;
default:
return -EINVAL;
}
@ -818,6 +853,10 @@ static int panthor_ioctl_dev_query(struct drm_device *ddev, void *data, struct d
return PANTHOR_UOBJ_SET(args->pointer, args->size, timestamp_info);
case DRM_PANTHOR_DEV_QUERY_GROUP_PRIORITIES_INFO:
panthor_query_group_priorities_info(file, &priorities_info);
return PANTHOR_UOBJ_SET(args->pointer, args->size, priorities_info);
default:
return -EINVAL;
}
@ -1037,24 +1076,6 @@ static int panthor_ioctl_group_destroy(struct drm_device *ddev, void *data,
return panthor_group_destroy(pfile, args->group_handle);
}
static int group_priority_permit(struct drm_file *file,
u8 priority)
{
/* Ensure that priority is valid */
if (priority > PANTHOR_GROUP_PRIORITY_REALTIME)
return -EINVAL;
/* Medium priority and below are always allowed */
if (priority <= PANTHOR_GROUP_PRIORITY_MEDIUM)
return 0;
/* Higher priorities require CAP_SYS_NICE or DRM_MASTER */
if (capable(CAP_SYS_NICE) || drm_is_current_master(file))
return 0;
return -EACCES;
}
static int panthor_ioctl_group_create(struct drm_device *ddev, void *data,
struct drm_file *file)
{
@ -1436,6 +1457,8 @@ static void panthor_debugfs_init(struct drm_minor *minor)
* PanCSF driver version:
* - 1.0 - initial interface
* - 1.1 - adds DEV_QUERY_TIMESTAMP_INFO query
* - 1.2 - adds DEV_QUERY_GROUP_PRIORITIES_INFO query
* - adds PANTHOR_GROUP_PRIORITY_REALTIME priority
*/
static const struct drm_driver panthor_drm_driver = {
.driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ |
@ -1449,7 +1472,7 @@ static const struct drm_driver panthor_drm_driver = {
.desc = "Panthor DRM driver",
.date = "20230801",
.major = 1,
.minor = 1,
.minor = 2,
.gem_create_object = panthor_gem_create_object,
.gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table,

22
include/uapi/drm/panthor_drm.h
View File

@ -263,6 +263,11 @@ enum drm_panthor_dev_query_type {
/** @DRM_PANTHOR_DEV_QUERY_TIMESTAMP_INFO: Query timestamp information. */
DRM_PANTHOR_DEV_QUERY_TIMESTAMP_INFO,
/**
* @DRM_PANTHOR_DEV_QUERY_GROUP_PRIORITIES_INFO: Query allowed group priorities information.
*/
DRM_PANTHOR_DEV_QUERY_GROUP_PRIORITIES_INFO,
};
/**
@ -399,6 +404,23 @@ struct drm_panthor_timestamp_info {
__u64 timestamp_offset;
};
/**
* struct drm_panthor_group_priorities_info - Group priorities information
*
* Structure grouping all queryable information relating to the allowed group priorities.
*/
struct drm_panthor_group_priorities_info {
/**
* @allowed_mask: Bitmask of the allowed group priorities.
*
* Each bit represents a variant of the enum drm_panthor_group_priority.
*/
__u8 allowed_mask;
/** @pad: Padding fields, MBZ. */
__u8 pad[3];
};
/**
* struct drm_panthor_dev_query - Arguments passed to DRM_PANTHOR_IOCTL_DEV_QUERY
*/