xref: /openbmc/linux/sound/soc/sof/ops.c (revision 1dedbe4f)
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