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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2//
3// This file is provided under a dual BSD/GPLv2 license. When using or
4// redistributing this file, you may do so under either license.
5//
6// Copyright(c) 2018 Intel Corporation
7//
8// Author: Liam Girdwood <[email protected]>
9//
10
11#include <linux/pci.h>
12#include "ops.h"
13
14static
15bool snd_sof_pci_update_bits_unlocked(struct snd_sof_dev *sdev, u32 offset,
16 u32 mask, u32 value)
17{
18 struct pci_dev *pci = to_pci_dev(sdev->dev);
19 unsigned int old, new;
20 u32 ret = 0;
21
22 pci_read_config_dword(pci, offset, &ret);
23 old = ret;
24 dev_dbg(sdev->dev, "Debug PCIR: %8.8x at %8.8x\n", old & mask, offset);
25
26 new = (old & ~mask) | (value & mask);
27
28 if (old == new)
29 return false;
30
31 pci_write_config_dword(pci, offset, new);
32 dev_dbg(sdev->dev, "Debug PCIW: %8.8x at %8.8x\n", value,
33 offset);
34
35 return true;
36}
37
38bool snd_sof_pci_update_bits(struct snd_sof_dev *sdev, u32 offset,
39 u32 mask, u32 value)
40{
41 guard(spinlock_irqsave)(&sdev->hw_lock);
42 return snd_sof_pci_update_bits_unlocked(sdev, offset, mask, value);
43}
44EXPORT_SYMBOL(snd_sof_pci_update_bits);
45
46bool snd_sof_dsp_update_bits_unlocked(struct snd_sof_dev *sdev, u32 bar,
47 u32 offset, u32 mask, u32 value)
48{
49 unsigned int old, new;
50 u32 ret;
51
52 ret = snd_sof_dsp_read(sdev, bar, offset);
53
54 old = ret;
55 new = (old & ~mask) | (value & mask);
56
57 if (old == new)
58 return false;
59
60 snd_sof_dsp_write(sdev, bar, offset, new);
61
62 return true;
63}
64EXPORT_SYMBOL(snd_sof_dsp_update_bits_unlocked);
65
66bool snd_sof_dsp_update_bits64_unlocked(struct snd_sof_dev *sdev, u32 bar,
67 u32 offset, u64 mask, u64 value)
68{
69 u64 old, new;
70
71 old = snd_sof_dsp_read64(sdev, bar, offset);
72
73 new = (old & ~mask) | (value & mask);
74
75 if (old == new)
76 return false;
77
78 snd_sof_dsp_write64(sdev, bar, offset, new);
79
80 return true;
81}
82EXPORT_SYMBOL(snd_sof_dsp_update_bits64_unlocked);
83
84/* This is for registers bits with attribute RWC */
85bool snd_sof_dsp_update_bits(struct snd_sof_dev *sdev, u32 bar, u32 offset,
86 u32 mask, u32 value)
87{
88 guard(spinlock_irqsave)(&sdev->hw_lock);
89 return snd_sof_dsp_update_bits_unlocked(sdev, bar, offset, mask, value);
90}
91EXPORT_SYMBOL(snd_sof_dsp_update_bits);
92
93bool snd_sof_dsp_update_bits64(struct snd_sof_dev *sdev, u32 bar, u32 offset,
94 u64 mask, u64 value)
95{
96 guard(spinlock_irqsave)(&sdev->hw_lock);
97 return snd_sof_dsp_update_bits64_unlocked(sdev, bar, offset, mask, value);
98}
99EXPORT_SYMBOL(snd_sof_dsp_update_bits64);
100
101static
102void snd_sof_dsp_update_bits_forced_unlocked(struct snd_sof_dev *sdev, u32 bar,
103 u32 offset, u32 mask, u32 value)
104{
105 unsigned int old, new;
106 u32 ret;
107
108 ret = snd_sof_dsp_read(sdev, bar, offset);
109
110 old = ret;
111 new = (old & ~mask) | (value & mask);
112
113 snd_sof_dsp_write(sdev, bar, offset, new);
114}
115
116/* This is for registers bits with attribute RWC */
117void snd_sof_dsp_update_bits_forced(struct snd_sof_dev *sdev, u32 bar,
118 u32 offset, u32 mask, u32 value)
119{
120 guard(spinlock_irqsave)(&sdev->hw_lock);
121 snd_sof_dsp_update_bits_forced_unlocked(sdev, bar, offset, mask, value);
122}
123EXPORT_SYMBOL(snd_sof_dsp_update_bits_forced);
124
125/**
126 * snd_sof_dsp_panic - handle a received DSP panic message
127 * @sdev: Pointer to the device's sdev
128 * @offset: offset of panic information
129 * @non_recoverable: the panic is fatal, no recovery will be done by the caller
130 */
131void snd_sof_dsp_panic(struct snd_sof_dev *sdev, u32 offset, bool non_recoverable)
132{
133 /*
134 * if DSP is not ready and the dsp_oops_offset is not yet set, use the
135 * offset from the panic message.
136 */
137 if (!sdev->dsp_oops_offset)
138 sdev->dsp_oops_offset = offset;
139
140 /*
141 * Print warning if the offset from the panic message differs from
142 * dsp_oops_offset
143 */
144 if (sdev->dsp_oops_offset != offset)
145 dev_warn(sdev->dev,
146 "%s: dsp_oops_offset %zu differs from panic offset %u\n",
147 __func__, sdev->dsp_oops_offset, offset);
148
149 /*
150 * Set the fw_state to crashed only in case of non recoverable DSP panic
151 * event.
152 * Use different message within the snd_sof_dsp_dbg_dump() depending on
153 * the non_recoverable flag.
154 */
155 sdev->dbg_dump_printed = false;
156 if (non_recoverable) {
157 snd_sof_dsp_dbg_dump(sdev, "DSP panic!",
158 SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
159 sof_set_fw_state(sdev, SOF_FW_CRASHED);
160 sof_fw_trace_fw_crashed(sdev);
161 } else {
162 snd_sof_dsp_dbg_dump(sdev,
163 "DSP panic (recovery will be attempted)",
164 SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
165 }
166}
167EXPORT_SYMBOL(snd_sof_dsp_panic);