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Subject[PATCH kernel v6 21/29] powerpc/powernv/ioda2: Introduce pnv_pci_ioda2_set_window
Date
This is a part of moving DMA window programming to an iommu_ops
callback.

This is a mechanical patch.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 85 ++++++++++++++++++++-----------
1 file changed, 56 insertions(+), 29 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index af9208c..8bb5d6d 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1386,6 +1386,57 @@ static void pnv_pci_free_table(struct iommu_table *tbl)
memset(tbl, 0, sizeof(struct iommu_table));
}

+static long pnv_pci_ioda2_set_window(struct pnv_ioda_pe *pe,
+ struct iommu_table *tbl)
+{
+ struct pnv_phb *phb = pe->phb;
+ const __be64 *swinvp;
+ 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 at %llx..%llx pagesize=0x%x tablesize=0x%lx\n",
+ start_addr, start_addr + win_size - 1,
+ 1UL << tbl->it_page_shift, tbl->it_size << 3);
+
+ pe->table_group.tables[0] = *tbl;
+ tbl = &pe->table_group.tables[0];
+ tbl->it_group = &pe->table_group;
+
+ /*
+ * 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);
+ if (rc) {
+ pe_err(pe, "Failed to configure TCE table, err %ld\n", rc);
+ goto fail;
+ }
+
+ /* OPAL variant of PHB3 invalidated TCEs */
+ swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
+ if (swinvp) {
+ /* We need a couple more fields -- an address and a data
+ * to or. Since the bus is only printed out on table free
+ * errors, and on the first pass the data will be a relative
+ * bus number, print that out instead.
+ */
+ pe->tce_inval_reg_phys = be64_to_cpup(swinvp);
+ tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys,
+ 8);
+ tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
+ }
+
+ return 0;
+fail:
+ if (pe->tce32_seg >= 0)
+ pe->tce32_seg = -1;
+
+ return rc;
+}
+
static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable)
{
uint16_t window_id = (pe->pe_number << 1 ) + 1;
@@ -1456,7 +1507,6 @@ static struct iommu_table_group_ops pnv_pci_ioda2_ops = {
static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
struct pnv_ioda_pe *pe)
{
- const __be64 *swinvp;
unsigned int end;
struct iommu_table *tbl = &pe->table_group.tables[0];
int64_t rc;
@@ -1484,31 +1534,14 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
iommu_init_table(tbl, phb->hose->node);
pe->table_group.ops = &pnv_pci_ioda2_ops;

- /*
- * 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, tbl);
if (rc) {
pe_err(pe, "Failed to configure 32-bit TCE table,"
" err %ld\n", rc);
- goto fail;
- }
-
- /* OPAL variant of PHB3 invalidated TCEs */
- swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
- if (swinvp) {
- /* We need a couple more fields -- an address and a data
- * to or. Since the bus is only printed out on table free
- * errors, and on the first pass the data will be a relative
- * bus number, print that out instead.
- */
- pe->tce_inval_reg_phys = be64_to_cpup(swinvp);
- tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys,
- 8);
- tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
+ pnv_pci_free_table(tbl);
+ if (pe->tce32_seg >= 0)
+ pe->tce32_seg = -1;
+ return;
}
iommu_register_group(&pe->table_group, phb->hose->global_number,
pe->pe_number);
@@ -1522,12 +1555,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
/* Also create a bypass window */
if (!pnv_iommu_bypass_disabled)
pnv_pci_ioda2_setup_bypass_pe(phb, pe);
-
- return;
-fail:
- if (pe->tce32_seg >= 0)
- pe->tce32_seg = -1;
- pnv_pci_free_table(tbl);
}

static void pnv_ioda_setup_dma(struct pnv_phb *phb)
--
2.0.0


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