| Message ID | 1462281773-26438-4-git-send-email-gwshan@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 05/03/2016 11:22 PM, Gavin Shan wrote: > pnv_pci_ioda_setup_opal_tce_kill() called by pnv_ioda_setup_dma() > to remap the TCE kill regiter. What's done in pnv_ioda_setup_dma() > will be covered in pcibios_setup_bridge() which is invoked on each > PCI bridge. It means we will possibly remap the TCE kill register > for multiple times and it's unnecessary. > > This moves pnv_pci_ioda_setup_opal_tce_kill() to where the PHB is > initialized (pnv_pci_init_ioda_phb()) to avoid above issue. > > Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> > --- > arch/powerpc/platforms/powernv/pci-ioda.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c > index 5ee8a57..cbd4c0b 100644 > --- a/arch/powerpc/platforms/powernv/pci-ioda.c > +++ b/arch/powerpc/platforms/powernv/pci-ioda.c > @@ -2599,8 +2599,6 @@ static void pnv_ioda_setup_dma(struct pnv_phb *phb) > pr_info("PCI: Domain %04x has %d available 32-bit DMA segments\n", > hose->global_number, phb->ioda.dma32_count); > > - pnv_pci_ioda_setup_opal_tce_kill(phb); > - > /* Walk our PE list and configure their DMA segments */ > list_for_each_entry(pe, &phb->ioda.pe_list, list) { > weight = pnv_pci_ioda_pe_dma_weight(pe); > @@ -3396,6 +3394,9 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np, > if (phb->regs == NULL) > pr_err(" Failed to map registers !\n"); > > + /* Initialize TCE kill register */ > + pnv_pci_ioda_setup_opal_tce_kill(phb); > + > /* Initialize more IODA stuff */ > phb->ioda.total_pe_num = 1; > prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); >
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 5ee8a57..cbd4c0b 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -2599,8 +2599,6 @@ static void pnv_ioda_setup_dma(struct pnv_phb *phb) pr_info("PCI: Domain %04x has %d available 32-bit DMA segments\n", hose->global_number, phb->ioda.dma32_count); - pnv_pci_ioda_setup_opal_tce_kill(phb); - /* Walk our PE list and configure their DMA segments */ list_for_each_entry(pe, &phb->ioda.pe_list, list) { weight = pnv_pci_ioda_pe_dma_weight(pe); @@ -3396,6 +3394,9 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np, if (phb->regs == NULL) pr_err(" Failed to map registers !\n"); + /* Initialize TCE kill register */ + pnv_pci_ioda_setup_opal_tce_kill(phb); + /* Initialize more IODA stuff */ phb->ioda.total_pe_num = 1; prop32 = of_get_property(np, "ibm,opal-num-pes", NULL);
pnv_pci_ioda_setup_opal_tce_kill() called by pnv_ioda_setup_dma() to remap the TCE kill regiter. What's done in pnv_ioda_setup_dma() will be covered in pcibios_setup_bridge() which is invoked on each PCI bridge. It means we will possibly remap the TCE kill register for multiple times and it's unnecessary. This moves pnv_pci_ioda_setup_opal_tce_kill() to where the PHB is initialized (pnv_pci_init_ioda_phb()) to avoid above issue. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> --- arch/powerpc/platforms/powernv/pci-ioda.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)