blob: a2fdf31cf27cd0683842163bb11ac81688a1d2a8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2016-2019 HabanaLabs, Ltd.
* All Rights Reserved.
*/
#include "habanalabs.h"
#include <linux/slab.h>
int hl_asid_init(struct hl_device *hdev)
{
hdev->asid_bitmap = kcalloc(BITS_TO_LONGS(hdev->asic_prop.max_asid),
sizeof(*hdev->asid_bitmap), GFP_KERNEL);
if (!hdev->asid_bitmap)
return -ENOMEM;
mutex_init(&hdev->asid_mutex);
/* ASID 0 is reserved for the kernel driver and device CPU */
set_bit(0, hdev->asid_bitmap);
return 0;
}
void hl_asid_fini(struct hl_device *hdev)
{
mutex_destroy(&hdev->asid_mutex);
kfree(hdev->asid_bitmap);
}
unsigned long hl_asid_alloc(struct hl_device *hdev)
{
unsigned long found;
mutex_lock(&hdev->asid_mutex);
found = find_first_zero_bit(hdev->asid_bitmap,
hdev->asic_prop.max_asid);
if (found == hdev->asic_prop.max_asid)
found = 0;
else
set_bit(found, hdev->asid_bitmap);
mutex_unlock(&hdev->asid_mutex);
return found;
}
void hl_asid_free(struct hl_device *hdev, unsigned long asid)
{
if (WARN((asid == 0 || asid >= hdev->asic_prop.max_asid),
"Invalid ASID %lu", asid))
return;
clear_bit(asid, hdev->asid_bitmap);
}
|
