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// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <uapi/drm/i915_drm.h>
#include <drm/drm_print.h>
#include "gem/i915_gem_context.h"
#include "i915_drm_client.h"
#include "i915_file_private.h"
#include "i915_gem.h"
#include "i915_utils.h"
void i915_drm_clients_init(struct i915_drm_clients *clients,
struct drm_i915_private *i915)
{
clients->i915 = i915;
clients->next_id = 0;
xa_init_flags(&clients->xarray, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
}
struct i915_drm_client *i915_drm_client_add(struct i915_drm_clients *clients)
{
struct i915_drm_client *client;
struct xarray *xa = &clients->xarray;
int ret;
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (!client)
return ERR_PTR(-ENOMEM);
xa_lock_irq(xa);
ret = __xa_alloc_cyclic(xa, &client->id, client, xa_limit_32b,
&clients->next_id, GFP_KERNEL);
xa_unlock_irq(xa);
if (ret < 0)
goto err;
kref_init(&client->kref);
spin_lock_init(&client->ctx_lock);
INIT_LIST_HEAD(&client->ctx_list);
client->clients = clients;
return client;
err:
kfree(client);
return ERR_PTR(ret);
}
void __i915_drm_client_free(struct kref *kref)
{
struct i915_drm_client *client =
container_of(kref, typeof(*client), kref);
struct xarray *xa = &client->clients->xarray;
unsigned long flags;
xa_lock_irqsave(xa, flags);
__xa_erase(xa, client->id);
xa_unlock_irqrestore(xa, flags);
kfree(client);
}
void i915_drm_clients_fini(struct i915_drm_clients *clients)
{
GEM_BUG_ON(!xa_empty(&clients->xarray));
xa_destroy(&clients->xarray);
}
#ifdef CONFIG_PROC_FS
static const char * const uabi_class_names[] = {
[I915_ENGINE_CLASS_RENDER] = "render",
[I915_ENGINE_CLASS_COPY] = "copy",
[I915_ENGINE_CLASS_VIDEO] = "video",
[I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
[I915_ENGINE_CLASS_COMPUTE] = "compute",
};
static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
{
struct i915_gem_engines_iter it;
struct intel_context *ce;
u64 total = 0;
for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) {
if (ce->engine->uabi_class != class)
continue;
total += intel_context_get_total_runtime_ns(ce);
}
return total;
}
static void
show_client_class(struct seq_file *m,
struct i915_drm_client *client,
unsigned int class)
{
const struct list_head *list = &client->ctx_list;
u64 total = atomic64_read(&client->past_runtime[class]);
const unsigned int capacity =
client->clients->i915->engine_uabi_class_count[class];
struct i915_gem_context *ctx;
rcu_read_lock();
list_for_each_entry_rcu(ctx, list, client_link)
total += busy_add(ctx, class);
rcu_read_unlock();
if (capacity)
seq_printf(m, "drm-engine-%s:\t%llu ns\n",
uabi_class_names[class], total);
if (capacity > 1)
seq_printf(m, "drm-engine-capacity-%s:\t%u\n",
uabi_class_names[class],
capacity);
}
void i915_drm_client_fdinfo(struct seq_file *m, struct file *f)
{
struct drm_file *file = f->private_data;
struct drm_i915_file_private *file_priv = file->driver_priv;
struct drm_i915_private *i915 = file_priv->dev_priv;
struct i915_drm_client *client = file_priv->client;
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
unsigned int i;
/*
* ******************************************************************
* For text output format description please see drm-usage-stats.rst!
* ******************************************************************
*/
seq_printf(m, "drm-driver:\t%s\n", i915->drm.driver->name);
seq_printf(m, "drm-pdev:\t%04x:%02x:%02x.%d\n",
pci_domain_nr(pdev->bus), pdev->bus->number,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
seq_printf(m, "drm-client-id:\t%u\n", client->id);
/*
* Temporarily skip showing client engine information with GuC submission till
* fetching engine busyness is implemented in the GuC submission backend
*/
if (GRAPHICS_VER(i915) < 8 || intel_uc_uses_guc_submission(&i915->gt0.uc))
return;
for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
show_client_class(m, client, i);
}
#endif
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