lkml.org 
[lkml]   [2015]   [Jun]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH kernel v11 26/34] powerpc/powernv/ioda2: Introduce pnv_pci_ioda2_set_window
On 06/02/2015 09:30 AM, David Gibson wrote:
> On Fri, May 29, 2015 at 06:44:50PM +1000, Alexey Kardashevskiy wrote:
>> This is a part of moving DMA window programming to an iommu_ops
>> callback. pnv_pci_ioda2_set_window() takes an iommu_table_group as
>> a first parameter (not pnv_ioda_pe) as it is going to be used as
>> a callback for VFIO DDW code.
>>
>> This adds pnv_pci_ioda2_tvt_invalidate() to invalidate TVT as it is
>
> I'm assuming that's what's now called pnv_pci_ioda2_invalidate_entire()?


Yes, my bad... And the patch is not adding it at all...


>
>> a good thing to do. It does not have immediate effect now as the table
>> is never recreated after reboot but it will in the following patches.
>>
>> This should cause no behavioural change.
>>
>> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
>> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
>> Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
>> ---
>> Changes:
>> v11:
>> * replaced some 1<<it_page_shift with IOMMU_PAGE_SIZE() macro
>>
>> v9:
>> * initialize pe->table_group.tables[0] at the very end when
>> tbl is fully initialized
>> * moved pnv_pci_ioda2_tvt_invalidate() from earlier patch
>> ---
>> arch/powerpc/platforms/powernv/pci-ioda.c | 47 +++++++++++++++++++++++++------
>> 1 file changed, 38 insertions(+), 9 deletions(-)
>>
>> diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
>> index 3d29fe3..fda01c1 100644
>> --- a/arch/powerpc/platforms/powernv/pci-ioda.c
>> +++ b/arch/powerpc/platforms/powernv/pci-ioda.c
>> @@ -1968,6 +1968,43 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
>> }
>> }
>>
>> +static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group,
>> + int num, struct iommu_table *tbl)
>> +{
>> + struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
>> + table_group);
>> + struct pnv_phb *phb = pe->phb;
>> + int64_t rc;
>> + const __u64 start_addr = tbl->it_offset << tbl->it_page_shift;
>> + const __u64 win_size = tbl->it_size << tbl->it_page_shift;
>> +
>> + pe_info(pe, "Setting up window %llx..%llx pg=%x\n",
>> + start_addr, start_addr + win_size - 1,
>> + IOMMU_PAGE_SIZE(tbl));
>> +
>> + /*
>> + * Map TCE table through TVT. The TVE index is the PE number
>> + * shifted by 1 bit for 32-bits DMA space.
>> + */
>> + rc = opal_pci_map_pe_dma_window(phb->opal_id,
>> + pe->pe_number,
>> + pe->pe_number << 1,
>> + 1,
>> + __pa(tbl->it_base),
>> + tbl->it_size << 3,
>> + IOMMU_PAGE_SIZE(tbl));
>> + if (rc) {
>> + pe_err(pe, "Failed to configure TCE table, err %ld\n", rc);
>> + return rc;
>> + }
>> +
>> + pnv_pci_link_table_and_group(phb->hose->node, num,
>> + tbl, &pe->table_group);
>> + pnv_pci_ioda2_tce_invalidate_entire(pe);
>> +
>> + return 0;
>> +}
>> +
>> static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable)
>> {
>> uint16_t window_id = (pe->pe_number << 1 ) + 1;
>> @@ -2123,21 +2160,13 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
>> pe->table_group.ops = &pnv_pci_ioda2_ops;
>> #endif
>>
>> - /*
>> - * Map TCE table through TVT. The TVE index is the PE number
>> - * shifted by 1 bit for 32-bits DMA space.
>> - */
>> - rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
>> - pe->pe_number << 1, 1, __pa(tbl->it_base),
>> - tbl->it_size << 3, 1ULL << tbl->it_page_shift);
>> + rc = pnv_pci_ioda2_set_window(&pe->table_group, 0, tbl);
>> if (rc) {
>> pe_err(pe, "Failed to configure 32-bit TCE table,"
>> " err %ld\n", rc);
>> goto fail;
>> }
>>
>> - pnv_pci_ioda2_tce_invalidate_entire(pe);
>> -
>> /* OPAL variant of PHB3 invalidated TCEs */
>> if (phb->ioda.tce_inval_reg)
>> tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
>


--
Alexey


\
 
 \ /
  Last update: 2015-06-03 14:01    [W:0.070 / U:19.836 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site