powerpc/eeh: Debugfs for error injection
The patch creates debugfs entries (powerpc/PCIxxxx/err_injct) for injecting EEH errors for testing purpose. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -12,6 +12,7 @@
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*/
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#include <linux/bootmem.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/io.h>
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@ -64,6 +65,29 @@ static struct notifier_block ioda_eeh_nb = {
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.priority = 0
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};
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#ifdef CONFIG_DEBUG_FS
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static int ioda_eeh_dbgfs_set(void *data, u64 val)
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{
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struct pci_controller *hose = data;
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struct pnv_phb *phb = hose->private_data;
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out_be64(phb->regs + 0xD10, val);
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return 0;
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}
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static int ioda_eeh_dbgfs_get(void *data, u64 *val)
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{
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struct pci_controller *hose = data;
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struct pnv_phb *phb = hose->private_data;
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*val = in_be64(phb->regs + 0xD10);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(ioda_eeh_dbgfs_ops, ioda_eeh_dbgfs_get,
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ioda_eeh_dbgfs_set, "0x%llx\n");
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#endif /* CONFIG_DEBUG_FS */
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/**
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* ioda_eeh_post_init - Chip dependent post initialization
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* @hose: PCI controller
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@ -101,6 +125,13 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
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}
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}
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#ifdef CONFIG_DEBUG_FS
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if (phb->dbgfs)
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debugfs_create_file("err_injct", 0600,
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phb->dbgfs, hose,
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&ioda_eeh_dbgfs_ops);
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#endif
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phb->eeh_enabled = 1;
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}
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