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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#include "xe_drm_client.h"
#include <drm/drm_print.h>
#include <uapi/drm/xe_drm.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
#include "xe_assert.h"
#include "xe_bo.h"
#include "xe_bo_types.h"
#include "xe_device_types.h"
#include "xe_exec_queue.h"
#include "xe_force_wake.h"
#include "xe_gt.h"
#include "xe_hw_engine.h"
#include "xe_pm.h"
#include "xe_trace.h"
/**
* DOC: DRM Client usage stats
*
* The drm/xe 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 and entirety of
* the currently possible format options:
*
* ::
*
* pos: 0
* flags: 0100002
* mnt_id: 26
* ino: 685
* drm-driver: xe
* drm-client-id: 3
* drm-pdev: 0000:03:00.0
* drm-total-system: 0
* drm-shared-system: 0
* drm-active-system: 0
* drm-resident-system: 0
* drm-purgeable-system: 0
* drm-total-gtt: 192 KiB
* drm-shared-gtt: 0
* drm-active-gtt: 0
* drm-resident-gtt: 192 KiB
* drm-total-vram0: 23992 KiB
* drm-shared-vram0: 16 MiB
* drm-active-vram0: 0
* drm-resident-vram0: 23992 KiB
* drm-total-stolen: 0
* drm-shared-stolen: 0
* drm-active-stolen: 0
* drm-resident-stolen: 0
* drm-cycles-rcs: 28257900
* drm-total-cycles-rcs: 7655183225
* drm-cycles-bcs: 0
* drm-total-cycles-bcs: 7655183225
* drm-cycles-vcs: 0
* drm-total-cycles-vcs: 7655183225
* drm-engine-capacity-vcs: 2
* drm-cycles-vecs: 0
* drm-total-cycles-vecs: 7655183225
* drm-engine-capacity-vecs: 2
* drm-cycles-ccs: 0
* drm-total-cycles-ccs: 7655183225
* drm-engine-capacity-ccs: 4
*
* Possible `drm-cycles-` key names are: `rcs`, `ccs`, `bcs`, `vcs`, `vecs` and
* "other".
*/
/**
* xe_drm_client_alloc() - Allocate drm client
* @void: No arg
*
* Allocate drm client struct to track client memory against
* same till client life. Call this API whenever new client
* has opened xe device.
*
* Return: pointer to client struct or NULL if can't allocate
*/
struct xe_drm_client *xe_drm_client_alloc(void)
{
struct xe_drm_client *client;
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (!client)
return NULL;
kref_init(&client->kref);
#ifdef CONFIG_PROC_FS
spin_lock_init(&client->bos_lock);
INIT_LIST_HEAD(&client->bos_list);
#endif
return client;
}
/**
* __xe_drm_client_free() - Free client struct
* @kref: The reference
*
* This frees client struct. Call this API when xe device is closed
* by drm client.
*
* Return: void
*/
void __xe_drm_client_free(struct kref *kref)
{
struct xe_drm_client *client =
container_of(kref, typeof(*client), kref);
kfree(client);
}
#ifdef CONFIG_PROC_FS
/**
* xe_drm_client_add_bo() - Add BO for tracking client mem usage
* @client: The drm client ptr
* @bo: The xe BO ptr
*
* Add all BO created by individual drm client by calling this function.
* This helps in tracking client memory usage.
*
* Return: void
*/
void xe_drm_client_add_bo(struct xe_drm_client *client,
struct xe_bo *bo)
{
XE_WARN_ON(bo->client);
XE_WARN_ON(!list_empty(&bo->client_link));
spin_lock(&client->bos_lock);
bo->client = xe_drm_client_get(client);
list_add_tail(&bo->client_link, &client->bos_list);
spin_unlock(&client->bos_lock);
}
/**
* xe_drm_client_remove_bo() - Remove BO for tracking client mem usage
* @bo: The xe BO ptr
*
* Remove all BO removed by individual drm client by calling this function.
* This helps in tracking client memory usage.
*
* Return: void
*/
void xe_drm_client_remove_bo(struct xe_bo *bo)
{
struct xe_device *xe = ttm_to_xe_device(bo->ttm.bdev);
struct xe_drm_client *client = bo->client;
xe_assert(xe, !kref_read(&bo->ttm.base.refcount));
spin_lock(&client->bos_lock);
list_del_init(&bo->client_link);
spin_unlock(&client->bos_lock);
xe_drm_client_put(client);
}
static void bo_meminfo(struct xe_bo *bo,
struct drm_memory_stats stats[TTM_NUM_MEM_TYPES])
{
u64 sz = bo->size;
u32 mem_type = bo->ttm.resource->mem_type;
xe_bo_assert_held(bo);
if (drm_gem_object_is_shared_for_memory_stats(&bo->ttm.base))
stats[mem_type].shared += sz;
else
stats[mem_type].private += sz;
if (xe_bo_has_pages(bo)) {
stats[mem_type].resident += sz;
if (!dma_resv_test_signaled(bo->ttm.base.resv,
DMA_RESV_USAGE_BOOKKEEP))
stats[mem_type].active += sz;
else if (mem_type == XE_PL_SYSTEM)
stats[mem_type].purgeable += sz;
}
}
static void show_meminfo(struct drm_printer *p, struct drm_file *file)
{
struct drm_memory_stats stats[TTM_NUM_MEM_TYPES] = {};
struct xe_file *xef = file->driver_priv;
struct ttm_device *bdev = &xef->xe->ttm;
struct ttm_resource_manager *man;
struct xe_drm_client *client;
struct drm_gem_object *obj;
struct xe_bo *bo;
LLIST_HEAD(deferred);
unsigned int id;
u32 mem_type;
client = xef->client;
/* Public objects. */
spin_lock(&file->table_lock);
idr_for_each_entry(&file->object_idr, obj, id) {
struct xe_bo *bo = gem_to_xe_bo(obj);
if (dma_resv_trylock(bo->ttm.base.resv)) {
bo_meminfo(bo, stats);
xe_bo_unlock(bo);
} else {
xe_bo_get(bo);
spin_unlock(&file->table_lock);
xe_bo_lock(bo, false);
bo_meminfo(bo, stats);
xe_bo_unlock(bo);
xe_bo_put(bo);
spin_lock(&file->table_lock);
}
}
spin_unlock(&file->table_lock);
/* Internal objects. */
spin_lock(&client->bos_lock);
list_for_each_entry(bo, &client->bos_list, client_link) {
if (!kref_get_unless_zero(&bo->ttm.base.refcount))
continue;
if (dma_resv_trylock(bo->ttm.base.resv)) {
bo_meminfo(bo, stats);
xe_bo_unlock(bo);
} else {
spin_unlock(&client->bos_lock);
xe_bo_lock(bo, false);
bo_meminfo(bo, stats);
xe_bo_unlock(bo);
spin_lock(&client->bos_lock);
/* The bo ref will prevent this bo from being removed from the list */
xe_assert(xef->xe, !list_empty(&bo->client_link));
}
xe_bo_put_deferred(bo, &deferred);
}
spin_unlock(&client->bos_lock);
xe_bo_put_commit(&deferred);
for (mem_type = XE_PL_SYSTEM; mem_type < TTM_NUM_MEM_TYPES; ++mem_type) {
if (!xe_mem_type_to_name[mem_type])
continue;
man = ttm_manager_type(bdev, mem_type);
if (man) {
drm_print_memory_stats(p,
&stats[mem_type],
DRM_GEM_OBJECT_RESIDENT |
(mem_type != XE_PL_SYSTEM ? 0 :
DRM_GEM_OBJECT_PURGEABLE),
xe_mem_type_to_name[mem_type]);
}
}
}
static void show_run_ticks(struct drm_printer *p, struct drm_file *file)
{
unsigned long class, i, gt_id, capacity[XE_ENGINE_CLASS_MAX] = { };
struct xe_file *xef = file->driver_priv;
struct xe_device *xe = xef->xe;
struct xe_gt *gt;
struct xe_hw_engine *hwe;
struct xe_exec_queue *q;
u64 gpu_timestamp;
xe_pm_runtime_get(xe);
/* Accumulate all the exec queues from this client */
mutex_lock(&xef->exec_queue.lock);
xa_for_each(&xef->exec_queue.xa, i, q) {
xe_exec_queue_get(q);
mutex_unlock(&xef->exec_queue.lock);
xe_exec_queue_update_run_ticks(q);
mutex_lock(&xef->exec_queue.lock);
xe_exec_queue_put(q);
}
mutex_unlock(&xef->exec_queue.lock);
/* Get the total GPU cycles */
for_each_gt(gt, xe, gt_id) {
enum xe_force_wake_domains fw;
hwe = xe_gt_any_hw_engine(gt);
if (!hwe)
continue;
fw = xe_hw_engine_to_fw_domain(hwe);
if (xe_force_wake_get(gt_to_fw(gt), fw)) {
hwe = NULL;
break;
}
gpu_timestamp = xe_hw_engine_read_timestamp(hwe);
XE_WARN_ON(xe_force_wake_put(gt_to_fw(gt), fw));
break;
}
xe_pm_runtime_put(xe);
if (unlikely(!hwe))
return;
for (class = 0; class < XE_ENGINE_CLASS_MAX; class++) {
const char *class_name;
for_each_gt(gt, xe, gt_id)
capacity[class] += gt->user_engines.instances_per_class[class];
/*
* Engines may be fused off or not exposed to userspace. Don't
* return anything if this entire class is not available
*/
if (!capacity[class])
continue;
class_name = xe_hw_engine_class_to_str(class);
drm_printf(p, "drm-cycles-%s:\t%llu\n",
class_name, xef->run_ticks[class]);
drm_printf(p, "drm-total-cycles-%s:\t%llu\n",
class_name, gpu_timestamp);
if (capacity[class] > 1)
drm_printf(p, "drm-engine-capacity-%s:\t%lu\n",
class_name, capacity[class]);
}
}
/**
* xe_drm_client_fdinfo() - Callback for fdinfo interface
* @p: The drm_printer ptr
* @file: The drm_file ptr
*
* This is callabck for drm fdinfo interface. Register this callback
* in drm driver ops for show_fdinfo.
*
* Return: void
*/
void xe_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
{
show_meminfo(p, file);
show_run_ticks(p, file);
}
#endif
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