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. All rights reserved. |
7 | // |
8 | // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> |
9 | // |
10 | |
11 | #include <linux/pci.h> |
12 | #include "ops.h" |
13 | |
14 | static |
15 | bool 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(dev: pci, where: offset, val: &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(dev: pci, where: offset, val: new); |
32 | dev_dbg(sdev->dev, "Debug PCIW: %8.8x at %8.8x\n" , value, |
33 | offset); |
34 | |
35 | return true; |
36 | } |
37 | |
38 | bool snd_sof_pci_update_bits(struct snd_sof_dev *sdev, u32 offset, |
39 | u32 mask, u32 value) |
40 | { |
41 | unsigned long flags; |
42 | bool change; |
43 | |
44 | spin_lock_irqsave(&sdev->hw_lock, flags); |
45 | change = snd_sof_pci_update_bits_unlocked(sdev, offset, mask, value); |
46 | spin_unlock_irqrestore(lock: &sdev->hw_lock, flags); |
47 | return change; |
48 | } |
49 | EXPORT_SYMBOL(snd_sof_pci_update_bits); |
50 | |
51 | bool snd_sof_dsp_update_bits_unlocked(struct snd_sof_dev *sdev, u32 bar, |
52 | u32 offset, u32 mask, u32 value) |
53 | { |
54 | unsigned int old, new; |
55 | u32 ret; |
56 | |
57 | ret = snd_sof_dsp_read(sdev, bar, offset); |
58 | |
59 | old = ret; |
60 | new = (old & ~mask) | (value & mask); |
61 | |
62 | if (old == new) |
63 | return false; |
64 | |
65 | snd_sof_dsp_write(sdev, bar, offset, value: new); |
66 | |
67 | return true; |
68 | } |
69 | EXPORT_SYMBOL(snd_sof_dsp_update_bits_unlocked); |
70 | |
71 | bool snd_sof_dsp_update_bits64_unlocked(struct snd_sof_dev *sdev, u32 bar, |
72 | u32 offset, u64 mask, u64 value) |
73 | { |
74 | u64 old, new; |
75 | |
76 | old = snd_sof_dsp_read64(sdev, bar, offset); |
77 | |
78 | new = (old & ~mask) | (value & mask); |
79 | |
80 | if (old == new) |
81 | return false; |
82 | |
83 | snd_sof_dsp_write64(sdev, bar, offset, value: new); |
84 | |
85 | return true; |
86 | } |
87 | EXPORT_SYMBOL(snd_sof_dsp_update_bits64_unlocked); |
88 | |
89 | /* This is for registers bits with attribute RWC */ |
90 | bool snd_sof_dsp_update_bits(struct snd_sof_dev *sdev, u32 bar, u32 offset, |
91 | u32 mask, u32 value) |
92 | { |
93 | unsigned long flags; |
94 | bool change; |
95 | |
96 | spin_lock_irqsave(&sdev->hw_lock, flags); |
97 | change = snd_sof_dsp_update_bits_unlocked(sdev, bar, offset, mask, |
98 | value); |
99 | spin_unlock_irqrestore(lock: &sdev->hw_lock, flags); |
100 | return change; |
101 | } |
102 | EXPORT_SYMBOL(snd_sof_dsp_update_bits); |
103 | |
104 | bool snd_sof_dsp_update_bits64(struct snd_sof_dev *sdev, u32 bar, u32 offset, |
105 | u64 mask, u64 value) |
106 | { |
107 | unsigned long flags; |
108 | bool change; |
109 | |
110 | spin_lock_irqsave(&sdev->hw_lock, flags); |
111 | change = snd_sof_dsp_update_bits64_unlocked(sdev, bar, offset, mask, |
112 | value); |
113 | spin_unlock_irqrestore(lock: &sdev->hw_lock, flags); |
114 | return change; |
115 | } |
116 | EXPORT_SYMBOL(snd_sof_dsp_update_bits64); |
117 | |
118 | static |
119 | void snd_sof_dsp_update_bits_forced_unlocked(struct snd_sof_dev *sdev, u32 bar, |
120 | u32 offset, u32 mask, u32 value) |
121 | { |
122 | unsigned int old, new; |
123 | u32 ret; |
124 | |
125 | ret = snd_sof_dsp_read(sdev, bar, offset); |
126 | |
127 | old = ret; |
128 | new = (old & ~mask) | (value & mask); |
129 | |
130 | snd_sof_dsp_write(sdev, bar, offset, value: new); |
131 | } |
132 | |
133 | /* This is for registers bits with attribute RWC */ |
134 | void snd_sof_dsp_update_bits_forced(struct snd_sof_dev *sdev, u32 bar, |
135 | u32 offset, u32 mask, u32 value) |
136 | { |
137 | unsigned long flags; |
138 | |
139 | spin_lock_irqsave(&sdev->hw_lock, flags); |
140 | snd_sof_dsp_update_bits_forced_unlocked(sdev, bar, offset, mask, value); |
141 | spin_unlock_irqrestore(lock: &sdev->hw_lock, flags); |
142 | } |
143 | EXPORT_SYMBOL(snd_sof_dsp_update_bits_forced); |
144 | |
145 | /** |
146 | * snd_sof_dsp_panic - handle a received DSP panic message |
147 | * @sdev: Pointer to the device's sdev |
148 | * @offset: offset of panic information |
149 | * @non_recoverable: the panic is fatal, no recovery will be done by the caller |
150 | */ |
151 | void snd_sof_dsp_panic(struct snd_sof_dev *sdev, u32 offset, bool non_recoverable) |
152 | { |
153 | /* |
154 | * if DSP is not ready and the dsp_oops_offset is not yet set, use the |
155 | * offset from the panic message. |
156 | */ |
157 | if (!sdev->dsp_oops_offset) |
158 | sdev->dsp_oops_offset = offset; |
159 | |
160 | /* |
161 | * Print warning if the offset from the panic message differs from |
162 | * dsp_oops_offset |
163 | */ |
164 | if (sdev->dsp_oops_offset != offset) |
165 | dev_warn(sdev->dev, |
166 | "%s: dsp_oops_offset %zu differs from panic offset %u\n" , |
167 | __func__, sdev->dsp_oops_offset, offset); |
168 | |
169 | /* |
170 | * Set the fw_state to crashed only in case of non recoverable DSP panic |
171 | * event. |
172 | * Use different message within the snd_sof_dsp_dbg_dump() depending on |
173 | * the non_recoverable flag. |
174 | */ |
175 | sdev->dbg_dump_printed = false; |
176 | if (non_recoverable) { |
177 | snd_sof_dsp_dbg_dump(sdev, msg: "DSP panic!" , |
178 | SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX); |
179 | sof_set_fw_state(sdev, new_state: SOF_FW_CRASHED); |
180 | sof_fw_trace_fw_crashed(sdev); |
181 | } else { |
182 | snd_sof_dsp_dbg_dump(sdev, |
183 | msg: "DSP panic (recovery will be attempted)" , |
184 | SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX); |
185 | } |
186 | } |
187 | EXPORT_SYMBOL(snd_sof_dsp_panic); |
188 | |