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powernv/pci: Add a debugfs entry to dump PHB's IODA PE state 

Add a debugfs entry to dump the state of the active IODA PEs. The IODA
PE state reflects how the PHB's internal concept of a PE is
configured. This is separate to the EEH PE state and is managed power
the PowerNV PCI backend rather than the EEH core.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[mpe: Use DEFINE_DEBUGFS_ATTRIBUTE]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190912052945.12589-3-oohall@gmail.com
This commit is contained in:
Oliver O'Halloran 2019-09-12 15:29:45 +10:00 committed by Michael Ellerman
parent c13a17b73e
commit 18697d2b08
1 changed files with 29 additions and 0 deletions
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29
arch/powerpc/platforms/powernv/pci-ioda.c
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@ -3107,6 +3107,33 @@ static int pnv_pci_diag_data_set(void *data, u64 val)
DEFINE_DEBUGFS_ATTRIBUTE(pnv_pci_diag_data_fops, NULL, pnv_pci_diag_data_set,
"%llu\n");
static int pnv_pci_ioda_pe_dump(void *data, u64 val)
{
struct pnv_phb *phb = data;
int pe_num;
for (pe_num = 0; pe_num < phb->ioda.total_pe_num; pe_num++) {
struct pnv_ioda_pe *pe = &phb->ioda.pe_array[pe_num];
if (!test_bit(pe_num, phb->ioda.pe_alloc))
continue;
pe_warn(pe, "rid: %04x dev count: %2d flags: %s%s%s%s%s%s\n",
pe->rid, pe->device_count,
(pe->flags & PNV_IODA_PE_DEV) ? "dev " : "",
(pe->flags & PNV_IODA_PE_BUS) ? "bus " : "",
(pe->flags & PNV_IODA_PE_BUS_ALL) ? "all " : "",
(pe->flags & PNV_IODA_PE_MASTER) ? "master " : "",
(pe->flags & PNV_IODA_PE_SLAVE) ? "slave " : "",
(pe->flags & PNV_IODA_PE_VF) ? "vf " : "");
}
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(pnv_pci_ioda_pe_dump_fops, NULL,
pnv_pci_ioda_pe_dump, "%llu\n");
#endif /* CONFIG_DEBUG_FS */
static void pnv_pci_ioda_create_dbgfs(void)
@ -3132,6 +3159,8 @@ static void pnv_pci_ioda_create_dbgfs(void)
debugfs_create_file_unsafe("dump_diag_regs", 0200, phb->dbgfs,
phb, &pnv_pci_diag_data_fops);
debugfs_create_file_unsafe("dump_ioda_pe_state", 0200, phb->dbgfs,
phb, &pnv_pci_ioda_pe_dump_fops);
}
#endif /* CONFIG_DEBUG_FS */
}