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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//
#include <linux/pci.h>
#include "ops.h"
static
bool snd_sof_pci_update_bits_unlocked(struct snd_sof_dev *sdev, u32 offset,
u32 mask, u32 value)
{
struct pci_dev *pci = to_pci_dev(sdev->dev);
unsigned int old, new;
u32 ret = 0;
pci_read_config_dword(pci, offset, &ret);
old = ret;
dev_dbg(sdev->dev, "Debug PCIR: %8.8x at %8.8x\n", old & mask, offset);
new = (old & ~mask) | (value & mask);
if (old == new)
return false;
pci_write_config_dword(pci, offset, new);
dev_dbg(sdev->dev, "Debug PCIW: %8.8x at %8.8x\n", value,
offset);
return true;
}
bool snd_sof_pci_update_bits(struct snd_sof_dev *sdev, u32 offset,
u32 mask, u32 value)
{
unsigned long flags;
bool change;
spin_lock_irqsave(&sdev->hw_lock, flags);
change = snd_sof_pci_update_bits_unlocked(sdev, offset, mask, value);
spin_unlock_irqrestore(&sdev->hw_lock, flags);
return change;
}
EXPORT_SYMBOL(snd_sof_pci_update_bits);
bool snd_sof_dsp_update_bits_unlocked(struct snd_sof_dev *sdev, u32 bar,
u32 offset, u32 mask, u32 value)
{
unsigned int old, new;
u32 ret;
ret = snd_sof_dsp_read(sdev, bar, offset);
old = ret;
new = (old & ~mask) | (value & mask);
if (old == new)
return false;
snd_sof_dsp_write(sdev, bar, offset, new);
return true;
}
EXPORT_SYMBOL(snd_sof_dsp_update_bits_unlocked);
bool snd_sof_dsp_update_bits64_unlocked(struct snd_sof_dev *sdev, u32 bar,
u32 offset, u64 mask, u64 value)
{
u64 old, new;
old = snd_sof_dsp_read64(sdev, bar, offset);
new = (old & ~mask) | (value & mask);
if (old == new)
return false;
snd_sof_dsp_write64(sdev, bar, offset, new);
return true;
}
EXPORT_SYMBOL(snd_sof_dsp_update_bits64_unlocked);
/* This is for registers bits with attribute RWC */
bool snd_sof_dsp_update_bits(struct snd_sof_dev *sdev, u32 bar, u32 offset,
u32 mask, u32 value)
{
unsigned long flags;
bool change;
spin_lock_irqsave(&sdev->hw_lock, flags);
change = snd_sof_dsp_update_bits_unlocked(sdev, bar, offset, mask,
value);
spin_unlock_irqrestore(&sdev->hw_lock, flags);
return change;
}
EXPORT_SYMBOL(snd_sof_dsp_update_bits);
bool snd_sof_dsp_update_bits64(struct snd_sof_dev *sdev, u32 bar, u32 offset,
u64 mask, u64 value)
{
unsigned long flags;
bool change;
spin_lock_irqsave(&sdev->hw_lock, flags);
change = snd_sof_dsp_update_bits64_unlocked(sdev, bar, offset, mask,
value);
spin_unlock_irqrestore(&sdev->hw_lock, flags);
return change;
}
EXPORT_SYMBOL(snd_sof_dsp_update_bits64);
static
void snd_sof_dsp_update_bits_forced_unlocked(struct snd_sof_dev *sdev, u32 bar,
u32 offset, u32 mask, u32 value)
{
unsigned int old, new;
u32 ret;
ret = snd_sof_dsp_read(sdev, bar, offset);
old = ret;
new = (old & ~mask) | (value & mask);
snd_sof_dsp_write(sdev, bar, offset, new);
}
/* This is for registers bits with attribute RWC */
void snd_sof_dsp_update_bits_forced(struct snd_sof_dev *sdev, u32 bar,
u32 offset, u32 mask, u32 value)
{
unsigned long flags;
spin_lock_irqsave(&sdev->hw_lock, flags);
snd_sof_dsp_update_bits_forced_unlocked(sdev, bar, offset, mask, value);
spin_unlock_irqrestore(&sdev->hw_lock, flags);
}
EXPORT_SYMBOL(snd_sof_dsp_update_bits_forced);
/**
* snd_sof_dsp_panic - handle a received DSP panic message
* @sdev: Pointer to the device's sdev
* @offset: offset of panic information
* @non_recoverable: the panic is fatal, no recovery will be done by the caller
*/
void snd_sof_dsp_panic(struct snd_sof_dev *sdev, u32 offset, bool non_recoverable)
{
/*
* if DSP is not ready and the dsp_oops_offset is not yet set, use the
* offset from the panic message.
*/
if (!sdev->dsp_oops_offset)
sdev->dsp_oops_offset = offset;
/*
* Print warning if the offset from the panic message differs from
* dsp_oops_offset
*/
if (sdev->dsp_oops_offset != offset)
dev_warn(sdev->dev,
"%s: dsp_oops_offset %zu differs from panic offset %u\n",
__func__, sdev->dsp_oops_offset, offset);
/*
* Set the fw_state to crashed only in case of non recoverable DSP panic
* event.
* Use different message within the snd_sof_dsp_dbg_dump() depending on
* the non_recoverable flag.
*/
sdev->dbg_dump_printed = false;
if (non_recoverable) {
snd_sof_dsp_dbg_dump(sdev, "DSP panic!",
SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
sof_set_fw_state(sdev, SOF_FW_CRASHED);
snd_sof_trace_notify_for_error(sdev);
} else {
snd_sof_dsp_dbg_dump(sdev,
"DSP panic (recovery will be attempted)",
SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
}
}
EXPORT_SYMBOL(snd_sof_dsp_panic);
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