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accel/amdxdna: Expose per-client BO memory usage via fdinfo

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Implement amdxdna_show_fdinfo() to report per-client memory usage,
including below driver-specific memory stat:
  - heap allocation
  - internal BO allocation
  - external BO allocation

Hook the implementation into the DRM fdinfo infrastructure via
drm_driver.show_fdinfo, while continuing to expose standard DRM
memory stat through drm_show_memory_stats().

This improves observability of per-process memory usage and aligns
with existing fdinfo reporting mechanisms used by other drivers.

Suggested-by: Ian Rogers <irogers@google.com>
Signed-off-by: Max Zhen <max.zhen@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260409152259.176883-1-lizhi.hou@amd.com
This commit is contained in:
Lizhi Hou 2026-04-09 08:22:59 -07:00
parent af29fcbe80
commit e0169d0c69
3 changed files with 57 additions and 1 deletions
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25
Documentation/accel/amdxdna/amdnpu.rst
View File

@ -270,6 +270,31 @@ MERT can report various kinds of telemetry information like the following:
* Deep Sleep counter
* etc.
.. _amdxdna-usage-stats:
Amdxdna DRM client usage stats implementation
=============================================
The amdxdna driver implements the DRM client usage stats specification as
documented in :ref:`drm-client-usage-stats`.
Example of the output showing the implemented key value pairs:
::
pos: 0
flags: 0100002
mnt_id: 29
ino: 939
drm-driver: amdxdna_accel_driver
drm-client-id: 3219
drm-pdev: 0000:c5:00.1
amdxdna_accel_driver-heap-alloc: 60 KiB
amdxdna_accel_driver-internal-alloc: 67588 KiB
amdxdna_accel_driver-external-alloc: 0
drm-total-memory: 67632 KiB
drm-shared-memory: 0
References
==========

1
Documentation/gpu/drm-usage-stats.rst
View File

@ -215,3 +215,4 @@ Driver specific implementations
* :ref:`panfrost-usage-stats`
* :ref:`panthor-usage-stats`
* :ref:`xe-usage-stats`
* :ref:`amdxdna-usage-stats`

32
drivers/accel/amdxdna/amdxdna_pci_drv.c
View File

@ -226,6 +226,35 @@ static const struct drm_ioctl_desc amdxdna_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(AMDXDNA_SET_STATE, amdxdna_drm_set_state_ioctl, DRM_ROOT_ONLY),
};
static void amdxdna_show_fdinfo(struct drm_printer *p, struct drm_file *filp)
{
struct amdxdna_client *client = filp->driver_priv;
size_t heap_usage, external_usage, internal_usage;
char *drv_name = filp->minor->dev->driver->name;
mutex_lock(&client->mm_lock);
heap_usage = client->heap_usage;
internal_usage = client->total_int_bo_usage;
external_usage = client->total_bo_usage - internal_usage;
mutex_unlock(&client->mm_lock);
/*
* Note for driver specific BO memory usage stat.
* Total memory alloc = amdxdna-internal-alloc + amdxdna-external-alloc
*/
drm_fdinfo_print_size(p, drv_name, "heap", "alloc", heap_usage);
drm_fdinfo_print_size(p, drv_name, "internal", "alloc", internal_usage);
drm_fdinfo_print_size(p, drv_name, "external", "alloc", external_usage);
/*
* Note for DRM standard BO memory stat.
* drm-total-memory counts both DEV BO and HEAP BO
* drm-shared-memory counts BO imported
*/
drm_show_memory_stats(p, filp);
}
static const struct file_operations amdxdna_fops = {
.owner = THIS_MODULE,
.open = accel_open,
@ -236,6 +265,7 @@ static const struct file_operations amdxdna_fops = {
.read = drm_read,
.llseek = noop_llseek,
.mmap = drm_gem_mmap,
.show_fdinfo = drm_show_fdinfo,
.fop_flags = FOP_UNSIGNED_OFFSET,
};
@ -251,7 +281,7 @@ const struct drm_driver amdxdna_drm_drv = {
.postclose = amdxdna_drm_close,
.ioctls = amdxdna_drm_ioctls,
.num_ioctls = ARRAY_SIZE(amdxdna_drm_ioctls),
.show_fdinfo = amdxdna_show_fdinfo,
.gem_create_object = amdxdna_gem_create_shmem_object_cb,
.gem_prime_import = amdxdna_gem_prime_import,
};