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The UFS driver has two driver-specific fault injection mechanisms (trigger_eh and timeout). Each fault injection configuration can only be specified by a module parameter and cannot be reconfigured without reloading the driver. Also, each configuration is common to all HBAs. This change adds the following subdirectories for each UFS HBA when debugfs is enabled: /sys/kernel/debug/ufshcd/<HBA>/timeout_inject /sys/kernel/debug/ufshcd/<HBA>/trigger_eh_inject Each fault injection attribute can be dynamically set per HBA by a corresponding file in these directories. This is tested with QEMU UFS devices. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Link: https://lore.kernel.org/r/20231118124443.1007116-1-akinobu.mita@gmail.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
29 lines
612 B
C
29 lines
612 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _UFS_FAULT_INJECTION_H
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#define _UFS_FAULT_INJECTION_H
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#include <linux/kconfig.h>
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#include <linux/types.h>
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#ifdef CONFIG_SCSI_UFS_FAULT_INJECTION
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void ufs_fault_inject_hba_init(struct ufs_hba *hba);
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bool ufs_trigger_eh(struct ufs_hba *hba);
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bool ufs_fail_completion(struct ufs_hba *hba);
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#else
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static inline void ufs_fault_inject_hba_init(struct ufs_hba *hba)
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{
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}
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static inline bool ufs_trigger_eh(struct ufs_hba *hba)
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{
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return false;
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}
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static inline bool ufs_fail_completion(struct ufs_hba *hba)
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{
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return false;
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}
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#endif
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#endif /* _UFS_FAULT_INJECTION_H */
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