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
snd_sof_pci_update_bits_unlocked(struct snd_sof_dev * sdev,u32 offset,u32 mask,u32 value)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(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
snd_sof_pci_update_bits(struct snd_sof_dev * sdev,u32 offset,u32 mask,u32 value)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(&sdev->hw_lock, flags);
47 return change;
48 }
49 EXPORT_SYMBOL(snd_sof_pci_update_bits);
50
snd_sof_dsp_update_bits_unlocked(struct snd_sof_dev * sdev,u32 bar,u32 offset,u32 mask,u32 value)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, new);
66
67 return true;
68 }
69 EXPORT_SYMBOL(snd_sof_dsp_update_bits_unlocked);
70
snd_sof_dsp_update_bits64_unlocked(struct snd_sof_dev * sdev,u32 bar,u32 offset,u64 mask,u64 value)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, 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 */
snd_sof_dsp_update_bits(struct snd_sof_dev * sdev,u32 bar,u32 offset,u32 mask,u32 value)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(&sdev->hw_lock, flags);
100 return change;
101 }
102 EXPORT_SYMBOL(snd_sof_dsp_update_bits);
103
snd_sof_dsp_update_bits64(struct snd_sof_dev * sdev,u32 bar,u32 offset,u64 mask,u64 value)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(&sdev->hw_lock, flags);
114 return change;
115 }
116 EXPORT_SYMBOL(snd_sof_dsp_update_bits64);
117
118 static
snd_sof_dsp_update_bits_forced_unlocked(struct snd_sof_dev * sdev,u32 bar,u32 offset,u32 mask,u32 value)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, new);
131 }
132
133 /* This is for registers bits with attribute RWC */
snd_sof_dsp_update_bits_forced(struct snd_sof_dev * sdev,u32 bar,u32 offset,u32 mask,u32 value)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(&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 */
snd_sof_dsp_panic(struct snd_sof_dev * sdev,u32 offset,bool non_recoverable)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, "DSP panic!",
178 SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
179 sof_set_fw_state(sdev, SOF_FW_CRASHED);
180 sof_fw_trace_fw_crashed(sdev);
181 } else {
182 snd_sof_dsp_dbg_dump(sdev,
183 "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