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s390/pci: add zpci_report_error interface
The 'report_error' interface for PCI devices found on s390 can be used by a user space program to inject an adapter error notification. Add a new kernel interface zpci_report_error to allow a PCI device driver to inject these error notifications without a detour over user space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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2 changed files with 13 additions and 0 deletions
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@ -11,6 +11,7 @@
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#include <asm-generic/pci.h>
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#include <asm/pci_clp.h>
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#include <asm/pci_debug.h>
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#include <asm/sclp.h>
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#define PCIBIOS_MIN_IO 0x1000
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#define PCIBIOS_MIN_MEM 0x10000000
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@ -216,6 +217,9 @@ void zpci_debug_init_device(struct zpci_dev *, const char *);
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void zpci_debug_exit_device(struct zpci_dev *);
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void zpci_debug_info(struct zpci_dev *, struct seq_file *);
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/* Error reporting */
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int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
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#ifdef CONFIG_NUMA
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/* Returns the node based on PCI bus */
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@ -854,6 +854,15 @@ void zpci_stop_device(struct zpci_dev *zdev)
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}
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EXPORT_SYMBOL_GPL(zpci_stop_device);
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int zpci_report_error(struct pci_dev *pdev,
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struct zpci_report_error_header *report)
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{
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struct zpci_dev *zdev = to_zpci(pdev);
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return sclp_pci_report(report, zdev->fh, zdev->fid);
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}
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EXPORT_SYMBOL(zpci_report_error);
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static inline int barsize(u8 size)
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{
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return (size) ? (1 << size) >> 10 : 0;
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