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drm/panfrost: Add an ioctl to query BO flags

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This is useful when importing BOs, so we can know about cacheability
and flush the caches when needed.

v2:
- New commit

v3:
- Add Steve's R-b

v4:
- No changes

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Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patch.msgid.link/20251208100841.730527-12-boris.brezillon@collabora.com
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
This commit is contained in:
Boris Brezillon 2025-12-08 11:08:38 +01:00
parent 7be45f5489
commit d17592e61f
2 changed files with 52 additions and 0 deletions
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33
drivers/gpu/drm/panfrost/panfrost_drv.c
View File

@ -630,6 +630,38 @@ static int panfrost_ioctl_sync_bo(struct drm_device *ddev, void *data,
return ret;
}
static int panfrost_ioctl_query_bo_info(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_panfrost_query_bo_info *args = data;
struct drm_gem_object *gem_obj;
struct panfrost_gem_object *bo;
gem_obj = drm_gem_object_lookup(file_priv, args->handle);
if (!gem_obj) {
DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
return -ENOENT;
}
bo = to_panfrost_bo(gem_obj);
args->pad = 0;
args->create_flags = 0;
args->extra_flags = 0;
if (drm_gem_is_imported(gem_obj)) {
args->extra_flags |= DRM_PANFROST_BO_IS_IMPORTED;
} else {
if (bo->noexec)
args->create_flags |= PANFROST_BO_NOEXEC;
if (bo->is_heap)
args->create_flags |= PANFROST_BO_HEAP;
}
drm_gem_object_put(gem_obj);
return 0;
}
int panfrost_unstable_ioctl_check(void)
{
if (!unstable_ioctls)
@ -700,6 +732,7 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
PANFROST_IOCTL(JM_CTX_CREATE, jm_ctx_create, DRM_RENDER_ALLOW),
PANFROST_IOCTL(JM_CTX_DESTROY, jm_ctx_destroy, DRM_RENDER_ALLOW),
PANFROST_IOCTL(SYNC_BO, sync_bo, DRM_RENDER_ALLOW),
PANFROST_IOCTL(QUERY_BO_INFO, query_bo_info, DRM_RENDER_ALLOW),
};
static void panfrost_gpu_show_fdinfo(struct panfrost_device *pfdev,

19
include/uapi/drm/panfrost_drm.h
View File

@ -25,6 +25,7 @@ extern "C" {
#define DRM_PANFROST_JM_CTX_CREATE 0x0a
#define DRM_PANFROST_JM_CTX_DESTROY 0x0b
#define DRM_PANFROST_SYNC_BO 0x0c
#define DRM_PANFROST_QUERY_BO_INFO 0x0d
#define DRM_IOCTL_PANFROST_SUBMIT DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_SUBMIT, struct drm_panfrost_submit)
#define DRM_IOCTL_PANFROST_WAIT_BO DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_WAIT_BO, struct drm_panfrost_wait_bo)
@ -37,6 +38,7 @@ extern "C" {
#define DRM_IOCTL_PANFROST_JM_CTX_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_JM_CTX_CREATE, struct drm_panfrost_jm_ctx_create)
#define DRM_IOCTL_PANFROST_JM_CTX_DESTROY DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_JM_CTX_DESTROY, struct drm_panfrost_jm_ctx_destroy)
#define DRM_IOCTL_PANFROST_SYNC_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_SYNC_BO, struct drm_panfrost_sync_bo)
#define DRM_IOCTL_PANFROST_QUERY_BO_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_QUERY_BO_INFO, struct drm_panfrost_query_bo_info)
/*
* Unstable ioctl(s): only exposed when the unsafe unstable_ioctls module
@ -353,6 +355,23 @@ struct drm_panfrost_sync_bo {
__u32 pad;
};
/** BO comes from a different subsystem. */
#define DRM_PANFROST_BO_IS_IMPORTED (1 << 0)
struct drm_panfrost_query_bo_info {
/** Handle of the object being queried. */
__u32 handle;
/** Extra flags that are not coming from the BO_CREATE ioctl(). */
__u32 extra_flags;
/** Flags passed at creation time. */
__u32 create_flags;
/** Will be zero on return. */
__u32 pad;
};
/* Definitions for coredump decoding in user space */
#define PANFROSTDUMP_MAJOR 1
#define PANFROSTDUMP_MINOR 0