powerpc/powernv/pci: Remove SWINV constants and obsolete TCE code

We have some obsolete code in pnv_pci_p7ioc_tce_invalidate()
to handle some internal lab tools that have stopped being
useful a long time ago. Remove that along with the definition
and test for the TCE_PCI_SWINV_* flags whose value is basically
always the same.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/include/asm/tce.h b/arch/powerpc/include/asm/tce.h
index 743f36b..12e3629 100644 (file)
--- a/arch/powerpc/include/asm/tce.h
+++ b/arch/powerpc/include/asm/tce.h
@@ -31,9 +31,6 @@
  */
 #define TCE_VB                 0
 #define TCE_PCI                        1
-#define TCE_PCI_SWINV_CREATE   2
-#define TCE_PCI_SWINV_FREE     4
-#define TCE_PCI_SWINV_PAIR     8
 
 /* TCE page size is 4096 bytes (1 << 12) */
 

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 4817bd1..c9494ea 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1733,29 +1733,15 @@ static void pnv_pci_p7ioc_tce_invalidate(struct iommu_table *tbl,
                (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys :
                pe->phb->ioda.tce_inval_reg;
        unsigned long start, end, inc;
-       const unsigned shift = tbl->it_page_shift;
 
        start = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset);
        end = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset +
                        npages - 1);
 
-       /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */
-       if (tbl->it_busno) {
-               start <<= shift;
-               end <<= shift;
-               inc = 128ull << shift;
-               start |= tbl->it_busno;
-               end |= tbl->it_busno;
-       } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) {
-               /* p7ioc-style invalidation, 2 TCEs per write */
-               start |= (1ull << 63);
-               end |= (1ull << 63);
-               inc = 16;
-        } else {
-               /* Default (older HW) */
-                inc = 128;
-       }
-
+       /* p7ioc-style invalidation, 2 TCEs per write */
+       start |= (1ull << 63);
+       end |= (1ull << 63);
+       inc = 16;
         end |= inc - 1;        /* round up end to be different than start */
 
         mb(); /* Ensure above stores are visible */
@@ -1781,7 +1767,7 @@ static int pnv_ioda1_tce_build(struct iommu_table *tbl, long index,
        int ret = pnv_tce_build(tbl, index, npages, uaddr, direction,
                        attrs);
 
-       if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE))
+       if (!ret)
                pnv_pci_p7ioc_tce_invalidate(tbl, index, npages, false);
 
        return ret;
@@ -1793,8 +1779,7 @@ static int pnv_ioda1_tce_xchg(struct iommu_table *tbl, long index,
 {
        long ret = pnv_tce_xchg(tbl, index, hpa, direction);
 
-       if (!ret && (tbl->it_type &
-                       (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE)))
+       if (!ret)
                pnv_pci_p7ioc_tce_invalidate(tbl, index, 1, false);
 
        return ret;
@@ -1806,8 +1791,7 @@ static void pnv_ioda1_tce_free(struct iommu_table *tbl, long index,
 {
        pnv_tce_free(tbl, index, npages);
 
-       if (tbl->it_type & TCE_PCI_SWINV_FREE)
-               pnv_pci_p7ioc_tce_invalidate(tbl, index, npages, false);
+       pnv_pci_p7ioc_tce_invalidate(tbl, index, npages, false);
 }
 
 static struct iommu_table_ops pnv_ioda1_iommu_ops = {
@@ -1910,7 +1894,7 @@ static int pnv_ioda2_tce_build(struct iommu_table *tbl, long index,
        int ret = pnv_tce_build(tbl, index, npages, uaddr, direction,
                        attrs);
 
-       if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE))
+       if (!ret)
                pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false);
 
        return ret;
@@ -1922,8 +1906,7 @@ static int pnv_ioda2_tce_xchg(struct iommu_table *tbl, long index,
 {
        long ret = pnv_tce_xchg(tbl, index, hpa, direction);
 
-       if (!ret && (tbl->it_type &
-                       (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE)))
+       if (!ret)
                pnv_pci_ioda2_tce_invalidate(tbl, index, 1, false);
 
        return ret;
@@ -1935,8 +1918,7 @@ static void pnv_ioda2_tce_free(struct iommu_table *tbl, long index,
 {
        pnv_tce_free(tbl, index, npages);
 
-       if (tbl->it_type & TCE_PCI_SWINV_FREE)
-               pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false);
+       pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false);
 }
 
 static void pnv_ioda2_table_free(struct iommu_table *tbl)
@@ -2105,12 +2087,6 @@ found:
                                  base * PNV_IODA1_DMA32_SEGSIZE,
                                  IOMMU_PAGE_SHIFT_4K);
 
-       /* OPAL variant of P7IOC SW invalidated TCEs */
-       if (phb->ioda.tce_inval_reg)
-               tbl->it_type |= (TCE_PCI_SWINV_CREATE |
-                                TCE_PCI_SWINV_FREE   |
-                                TCE_PCI_SWINV_PAIR);
-
        tbl->it_ops = &pnv_ioda1_iommu_ops;
        pe->table_group.tce32_start = tbl->it_offset << tbl->it_page_shift;
        pe->table_group.tce32_size = tbl->it_size << tbl->it_page_shift;
@@ -2233,8 +2209,6 @@ static long pnv_pci_ioda2_create_table(struct iommu_table_group *table_group,
        }
 
        tbl->it_ops = &pnv_ioda2_iommu_ops;
-       if (pe->phb->ioda.tce_inval_reg)
-               tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
 
        *ptbl = tbl;
 
@@ -2283,10 +2257,6 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe)
        if (!pnv_iommu_bypass_disabled)
                pnv_pci_ioda2_set_bypass(pe, true);
 
-       /* OPAL variant of PHB3 invalidated TCEs */
-       if (pe->phb->ioda.tce_inval_reg)
-               tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
-
        /*
         * Setting table base here only for carrying iommu_group
         * further down to let iommu_add_device() do the job.