2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called COPYING.
22 #include <linux/kernel.h>
23 #include <linux/spinlock.h>
24 #include <linux/device.h>
25 #include <linux/idr.h>
26 #include <linux/kdev_t.h>
27 #include <linux/err.h>
28 #include <linux/dca.h>
29 #include <linux/gfp.h>
31 static struct class *dca_class
;
32 static struct idr dca_idr
;
33 static spinlock_t dca_idr_lock
;
35 int dca_sysfs_add_req(struct dca_provider
*dca
, struct device
*dev
, int slot
)
40 cd
= device_create(dca_class
, dca
->cd
, MKDEV(0, slot
+ 1), NULL
,
41 "requester%d", req_count
++);
47 void dca_sysfs_remove_req(struct dca_provider
*dca
, int slot
)
49 device_destroy(dca_class
, MKDEV(0, slot
+ 1));
52 int dca_sysfs_add_provider(struct dca_provider
*dca
, struct device
*dev
)
58 if (!idr_pre_get(&dca_idr
, GFP_KERNEL
))
60 spin_lock(&dca_idr_lock
);
61 err
= idr_get_new(&dca_idr
, dca
, &dca
->id
);
62 spin_unlock(&dca_idr_lock
);
72 cd
= device_create(dca_class
, dev
, MKDEV(0, 0), NULL
, "dca%d", dca
->id
);
74 spin_lock(&dca_idr_lock
);
75 idr_remove(&dca_idr
, dca
->id
);
76 spin_unlock(&dca_idr_lock
);
83 void dca_sysfs_remove_provider(struct dca_provider
*dca
)
85 device_unregister(dca
->cd
);
87 spin_lock(&dca_idr_lock
);
88 idr_remove(&dca_idr
, dca
->id
);
89 spin_unlock(&dca_idr_lock
);
92 int __init
dca_sysfs_init(void)
95 spin_lock_init(&dca_idr_lock
);
97 dca_class
= class_create(THIS_MODULE
, "dca");
98 if (IS_ERR(dca_class
)) {
99 idr_destroy(&dca_idr
);
100 return PTR_ERR(dca_class
);
105 void __exit
dca_sysfs_exit(void)
107 class_destroy(dca_class
);
108 idr_destroy(&dca_idr
);
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