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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 "i915_drm_client.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);
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);
}
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