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6324f62da7
With "zpcictl --reset DDDD:BB:FF.F" now causing a fully Linux driven reset where the Linux kernel does an explicit device driver unbind, disable and re-enable, let's also expose a way to instead have firmware perform a device reset by issuing an SCLP with SCLP_ERRNOTIFY_RESET. When firmware is done resetting the device it will then issue an error notification with PCI Error Code 0x3a indicating successful reset, which will subsequently cause the new kernel based automatic recovery mechanism to perform recovery in coordination with the device driver. This allows resetting devices without unbinding them from their device driver and thus without losing related block devices or network interfaces. This may also be used to test the automatic recovery mechanism. Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* zpcictl - Manage PCI devices on z Systems
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*
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* Copyright IBM Corp. 2018
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef ZPCICTL_H
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#define ZPCICTL_H
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#include <linux/types.h>
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#include "lib/zt_common.h"
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#define SCLP_ERRNOTIFY_AQ_RESET 0
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#define SCLP_ERRNOTIFY_AQ_DECONF 1
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#define SCLP_ERRNOTIFY_AQ_REPORT_ERR 2
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#define PCI_CLASS_UNCLASSIFIED 0x000000U
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#define PCI_CLASS_NVME 0x010802U
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#define PCI_CLASS_NETWORK 0x020000U
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struct options {
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unsigned int reset;
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unsigned int reset_fw;
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unsigned int deconfigure;
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unsigned int report;
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};
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struct zpci_device {
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u16 fid;
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u16 pchid;
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u32 class;
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char slot[13];
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char *device;
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};
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struct zpci_report_error_header {
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__u8 version; /* Interface version byte */
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__u8 action; /* Action qualifier byte
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* 0: Adapter Reset Request
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* 1: Deconfigure and repair action requested
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* 2: Informational Report
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*/
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__u16 length; /* Length of Subsequent Data (up to 4K – SCLP header) */
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__u8 data[0]; /* Subsequent Data passed verbatim to SCLP ET 24 */
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};
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struct zpci_report_error_data {
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__u64 timestamp;
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__u64 err_log_id;
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char log_data[4054]; /* We cannot exceed a total of 4074 bytes (header + data) */
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};
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struct zpci_report_error {
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struct zpci_report_error_header header;
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struct zpci_report_error_data data;
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} __packed;
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#endif /* ZPCICTL_H */
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