Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2024, Advanced Micro Devices, Inc.
4 */
5
6#include <drm/amdxdna_accel.h>
7#include <drm/drm_device.h>
8#include <drm/drm_print.h>
9#include <drm/gpu_scheduler.h>
10
11#include "aie2_pci.h"
12#include "amdxdna_pci_drv.h"
13#include "amdxdna_pm.h"
14
15#define AIE2_CLK_GATING_ENABLE 1
16#define AIE2_CLK_GATING_DISABLE 0
17
18static int aie2_pm_set_clk_gating(struct amdxdna_dev_hdl *ndev, u32 val)
19{
20 int ret;
21
22 ret = aie2_runtime_cfg(ndev, AIE2_RT_CFG_CLK_GATING, &val);
23 if (ret)
24 return ret;
25
26 ndev->clk_gating = val;
27 return 0;
28}
29
30int aie2_pm_set_dpm(struct amdxdna_dev_hdl *ndev, u32 dpm_level)
31{
32 int ret;
33
34 ret = amdxdna_pm_resume_get_locked(ndev->xdna);
35 if (ret)
36 return ret;
37
38 ret = ndev->priv->hw_ops.set_dpm(ndev, dpm_level);
39 if (!ret)
40 ndev->dpm_level = dpm_level;
41 amdxdna_pm_suspend_put(ndev->xdna);
42
43 return ret;
44}
45
46int aie2_pm_init(struct amdxdna_dev_hdl *ndev)
47{
48 int ret;
49
50 if (ndev->dev_status != AIE2_DEV_UNINIT) {
51 /* Resume device */
52 ret = ndev->priv->hw_ops.set_dpm(ndev, ndev->dpm_level);
53 if (ret)
54 return ret;
55
56 ret = aie2_pm_set_clk_gating(ndev, ndev->clk_gating);
57 if (ret)
58 return ret;
59
60 return 0;
61 }
62
63 while (ndev->priv->dpm_clk_tbl[ndev->max_dpm_level].hclk)
64 ndev->max_dpm_level++;
65 ndev->max_dpm_level--;
66
67 ret = ndev->priv->hw_ops.set_dpm(ndev, ndev->max_dpm_level);
68 if (ret)
69 return ret;
70 ndev->dpm_level = ndev->max_dpm_level;
71
72 ret = aie2_pm_set_clk_gating(ndev, AIE2_CLK_GATING_ENABLE);
73 if (ret)
74 return ret;
75
76 ndev->pw_mode = POWER_MODE_DEFAULT;
77 ndev->dft_dpm_level = ndev->max_dpm_level;
78
79 return 0;
80}
81
82int aie2_pm_set_mode(struct amdxdna_dev_hdl *ndev, enum amdxdna_power_mode_type target)
83{
84 struct amdxdna_dev *xdna = ndev->xdna;
85 u32 clk_gating, dpm_level;
86 int ret;
87
88 drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
89
90 if (ndev->pw_mode == target)
91 return 0;
92
93 switch (target) {
94 case POWER_MODE_TURBO:
95 if (ndev->hwctx_num) {
96 XDNA_ERR(xdna, "Can not set turbo when there is active hwctx");
97 return -EINVAL;
98 }
99
100 clk_gating = AIE2_CLK_GATING_DISABLE;
101 dpm_level = ndev->max_dpm_level;
102 break;
103 case POWER_MODE_HIGH:
104 clk_gating = AIE2_CLK_GATING_ENABLE;
105 dpm_level = ndev->max_dpm_level;
106 break;
107 case POWER_MODE_DEFAULT:
108 clk_gating = AIE2_CLK_GATING_ENABLE;
109 dpm_level = ndev->dft_dpm_level;
110 break;
111 default:
112 return -EOPNOTSUPP;
113 }
114
115 ret = aie2_pm_set_dpm(ndev, dpm_level);
116 if (ret)
117 return ret;
118
119 ret = aie2_pm_set_clk_gating(ndev, clk_gating);
120 if (ret)
121 return ret;
122
123 ndev->pw_mode = target;
124
125 return 0;
126}