1 // SPDX-License-Identifier: GPL-2.0
2
3 /*
4 * Copyright 2016-2018 HabanaLabs, Ltd.
5 * All Rights Reserved.
6 */
7
8 #include "gaudiP.h"
9 #include "../include/gaudi/gaudi_fw_if.h"
10
gaudi_set_pll_profile(struct hl_device * hdev,enum hl_pll_frequency freq)11 void gaudi_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq)
12 {
13 struct gaudi_device *gaudi = hdev->asic_specific;
14
15 if (freq == PLL_LAST)
16 hl_set_frequency(hdev, MME_PLL, gaudi->max_freq_value);
17 }
18
gaudi_get_clk_rate(struct hl_device * hdev,u32 * cur_clk,u32 * max_clk)19 int gaudi_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk)
20 {
21 long value;
22
23 if (hl_device_disabled_or_in_reset(hdev))
24 return -ENODEV;
25
26 value = hl_get_frequency(hdev, MME_PLL, false);
27
28 if (value < 0) {
29 dev_err(hdev->dev, "Failed to retrieve device max clock %ld\n",
30 value);
31 return value;
32 }
33
34 *max_clk = (value / 1000 / 1000);
35
36 value = hl_get_frequency(hdev, MME_PLL, true);
37
38 if (value < 0) {
39 dev_err(hdev->dev,
40 "Failed to retrieve device current clock %ld\n",
41 value);
42 return value;
43 }
44
45 *cur_clk = (value / 1000 / 1000);
46
47 return 0;
48 }
49
clk_max_freq_mhz_show(struct device * dev,struct device_attribute * attr,char * buf)50 static ssize_t clk_max_freq_mhz_show(struct device *dev,
51 struct device_attribute *attr, char *buf)
52 {
53 struct hl_device *hdev = dev_get_drvdata(dev);
54 struct gaudi_device *gaudi = hdev->asic_specific;
55 long value;
56
57 if (hl_device_disabled_or_in_reset(hdev))
58 return -ENODEV;
59
60 value = hl_get_frequency(hdev, MME_PLL, false);
61
62 gaudi->max_freq_value = value;
63
64 return sprintf(buf, "%lu\n", (value / 1000 / 1000));
65 }
66
clk_max_freq_mhz_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)67 static ssize_t clk_max_freq_mhz_store(struct device *dev,
68 struct device_attribute *attr, const char *buf, size_t count)
69 {
70 struct hl_device *hdev = dev_get_drvdata(dev);
71 struct gaudi_device *gaudi = hdev->asic_specific;
72 int rc;
73 u64 value;
74
75 if (hl_device_disabled_or_in_reset(hdev)) {
76 count = -ENODEV;
77 goto fail;
78 }
79
80 rc = kstrtoull(buf, 0, &value);
81 if (rc) {
82 count = -EINVAL;
83 goto fail;
84 }
85
86 gaudi->max_freq_value = value * 1000 * 1000;
87
88 hl_set_frequency(hdev, MME_PLL, gaudi->max_freq_value);
89
90 fail:
91 return count;
92 }
93
clk_cur_freq_mhz_show(struct device * dev,struct device_attribute * attr,char * buf)94 static ssize_t clk_cur_freq_mhz_show(struct device *dev,
95 struct device_attribute *attr, char *buf)
96 {
97 struct hl_device *hdev = dev_get_drvdata(dev);
98 long value;
99
100 if (hl_device_disabled_or_in_reset(hdev))
101 return -ENODEV;
102
103 value = hl_get_frequency(hdev, MME_PLL, true);
104
105 return sprintf(buf, "%lu\n", (value / 1000 / 1000));
106 }
107
108 static DEVICE_ATTR_RW(clk_max_freq_mhz);
109 static DEVICE_ATTR_RO(clk_cur_freq_mhz);
110
111 static struct attribute *gaudi_dev_attrs[] = {
112 &dev_attr_clk_max_freq_mhz.attr,
113 &dev_attr_clk_cur_freq_mhz.attr,
114 NULL,
115 };
116
gaudi_add_device_attr(struct hl_device * hdev,struct attribute_group * dev_attr_grp)117 void gaudi_add_device_attr(struct hl_device *hdev,
118 struct attribute_group *dev_attr_grp)
119 {
120 dev_attr_grp->attrs = gaudi_dev_attrs;
121 }
122
