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powerpc/pci: Add shutdown hook to pci_controller_ops 

Currently pnv_pci_shutdown() calls the PHB shutdown code for all PHBs in the
system.  It dereferences the private_data assuming it's a powernv PHB, which
won't be the case when we have different PHB in the systems (like when we add
vPHBs for CXL).

This moves the shutdown hook to the pci_controller_ops and fixes the call site
to use that instead.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Neuling 2015-05-27 16:06:59 +10:00 committed by Michael Ellerman
parent f46580a5cf
commit 7a8e6bbf85
4 changed files with 9 additions and 11 deletions
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2
arch/powerpc/include/asm/pci-bridge.h
View File

@ -40,6 +40,8 @@ struct pci_controller_ops {
#endif
int (*dma_set_mask)(struct pci_dev *dev, u64 dma_mask);
void (*shutdown)(struct pci_controller *);
};
/*

8
arch/powerpc/platforms/powernv/pci-ioda.c
View File

@ -2643,8 +2643,10 @@ static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus,
return phb->ioda.pe_rmap[(bus->number << 8) | devfn];
}
static void pnv_pci_ioda_shutdown(struct pnv_phb *phb)
static void pnv_pci_ioda_shutdown(struct pci_controller *hose)
{
struct pnv_phb *phb = hose->private_data;
opal_pci_reset(phb->opal_id, OPAL_RESET_PCI_IODA_TABLE,
OPAL_ASSERT_RESET);
}
@ -2659,6 +2661,7 @@ static const struct pci_controller_ops pnv_pci_ioda_controller_ops = {
.window_alignment = pnv_pci_window_alignment,
.reset_secondary_bus = pnv_pci_reset_secondary_bus,
.dma_set_mask = pnv_pci_ioda_dma_set_mask,
.shutdown = pnv_pci_ioda_shutdown,
};
static void __init pnv_pci_init_ioda_phb(struct device_node *np,
@ -2806,9 +2809,6 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;
phb->dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask;
/* Setup shutdown function for kexec */
phb->shutdown = pnv_pci_ioda_shutdown;
/* Setup MSI support */
pnv_pci_init_ioda_msis(phb);

9
arch/powerpc/platforms/powernv/pci.c
View File

@ -704,12 +704,9 @@ void pnv_pci_shutdown(void)
{
struct pci_controller *hose;
list_for_each_entry(hose, &hose_list, list_node) {
struct pnv_phb *phb = hose->private_data;
if (phb && phb->shutdown)
phb->shutdown(phb);
}
list_for_each_entry(hose, &hose_list, list_node)
if (hose->controller_ops.shutdown)
hose->controller_ops.shutdown(hose);
}
/* Fixup wrong class code in p7ioc and p8 root complex */

1
arch/powerpc/platforms/powernv/pci.h
View File

@ -110,7 +110,6 @@ struct pnv_phb {
struct pci_dev *pdev);
void (*fixup_phb)(struct pci_controller *hose);
u32 (*bdfn_to_pe)(struct pnv_phb *phb, struct pci_bus *bus, u32 devfn);
void (*shutdown)(struct pnv_phb *phb);
int (*init_m64)(struct pnv_phb *phb);
void (*reserve_m64_pe)(struct pnv_phb *phb);
int (*pick_m64_pe)(struct pnv_phb *phb, struct pci_bus *bus, int all);