[PATCH v4 06/16] powerpc/powernv: Make invalidate() a callback
Alexey Kardashevskiy
aik at ozlabs.ru
Wed Jul 30 19:31:25 EST 2014
At the moment pnv_pci_ioda_tce_invalidate() gets the PE pointer via
container_of(tbl). Since we are going to have to add Dynamic DMA windows
and that means having 2 IOMMU tables per PE, this is not going to work.
This implements pnv_pci_ioda(1|2)_tce_invalidate as a pnv_ioda_pe callback.
This adds a pnv_iommu_table wrapper around iommu_table and stores a pointer
to PE there. PNV's ppc_md.tce_build() call uses this to find PE and
do the invalidation. This will be used later for Dynamic DMA windows too.
This registers invalidate() callbacks for IODA1 and IODA2:
- pnv_pci_ioda1_tce_invalidate;
- pnv_pci_ioda2_tce_invalidate.
Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---
Changes:
v4:
* changed commit log to explain why this change is needed
---
arch/powerpc/platforms/powernv/pci-ioda.c | 33 +++++++++++--------------------
arch/powerpc/platforms/powernv/pci.c | 31 +++++++++++++++++++++--------
arch/powerpc/platforms/powernv/pci.h | 13 +++++++++++-
3 files changed, 47 insertions(+), 30 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 9f28e18..007497f 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -462,7 +462,7 @@ static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev
pe = &phb->ioda.pe_array[pdn->pe_number];
WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops);
- set_iommu_table_base(&pdev->dev, &pe->tce32_table);
+ set_iommu_table_base(&pdev->dev, &pe->tce32.table);
}
static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb,
@@ -489,7 +489,7 @@ static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb,
} else {
dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n");
set_dma_ops(&pdev->dev, &dma_iommu_ops);
- set_iommu_table_base(&pdev->dev, &pe->tce32_table);
+ set_iommu_table_base(&pdev->dev, &pe->tce32.table);
}
return 0;
}
@@ -499,7 +499,7 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus)
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
- set_iommu_table_base_and_group(&dev->dev, &pe->tce32_table);
+ set_iommu_table_base_and_group(&dev->dev, &pe->tce32.table);
if (dev->subordinate)
pnv_ioda_setup_bus_dma(pe, dev->subordinate);
}
@@ -584,19 +584,6 @@ static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe,
}
}
-void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl,
- __be64 *startp, __be64 *endp, bool rm)
-{
- struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe,
- tce32_table);
- struct pnv_phb *phb = pe->phb;
-
- if (phb->type == PNV_PHB_IODA1)
- pnv_pci_ioda1_tce_invalidate(pe, tbl, startp, endp, rm);
- else
- pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp, rm);
-}
-
static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
struct pnv_ioda_pe *pe, unsigned int base,
unsigned int segs)
@@ -654,9 +641,11 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
}
/* Setup linux iommu table */
- tbl = &pe->tce32_table;
+ tbl = &pe->tce32.table;
pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs,
base << 28, IOMMU_PAGE_SHIFT_4K);
+ pe->tce32.pe = pe;
+ pe->tce_invalidate = pnv_pci_ioda1_tce_invalidate;
/* OPAL variant of P7IOC SW invalidated TCEs */
swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
@@ -693,7 +682,7 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
static void pnv_pci_ioda2_set_bypass(struct iommu_table *tbl, bool enable)
{
struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe,
- tce32_table);
+ tce32.table);
uint16_t window_id = (pe->pe_number << 1 ) + 1;
int64_t rc;
@@ -734,10 +723,10 @@ static void pnv_pci_ioda2_setup_bypass_pe(struct pnv_phb *phb,
pe->tce_bypass_base = 1ull << 59;
/* Install set_bypass callback for VFIO */
- pe->tce32_table.set_bypass = pnv_pci_ioda2_set_bypass;
+ pe->tce32.table.set_bypass = pnv_pci_ioda2_set_bypass;
/* Enable bypass by default */
- pnv_pci_ioda2_set_bypass(&pe->tce32_table, true);
+ pnv_pci_ioda2_set_bypass(&pe->tce32.table, true);
}
static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
@@ -785,9 +774,11 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
}
/* Setup linux iommu table */
- tbl = &pe->tce32_table;
+ tbl = &pe->tce32.table;
pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0,
IOMMU_PAGE_SHIFT_4K);
+ pe->tce32.pe = pe;
+ pe->tce_invalidate = pnv_pci_ioda2_tce_invalidate;
/* OPAL variant of PHB3 invalidated TCEs */
swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index 4dff552..74a2626 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -550,6 +550,27 @@ struct pci_ops pnv_pci_ops = {
.write = pnv_pci_write_config,
};
+static void pnv_tce_invalidate(struct iommu_table *tbl, __be64 *startp,
+ __be64 *endp, bool rm)
+{
+ struct pnv_iommu_table *ptbl = container_of(tbl,
+ struct pnv_iommu_table, table);
+ struct pnv_ioda_pe *pe = ptbl->pe;
+
+ /*
+ * Some implementations won't cache invalid TCEs and thus may not
+ * need that flush. We'll probably turn it_type into a bit mask
+ * of flags if that becomes the case
+ */
+ if (!(tbl->it_type & TCE_PCI_SWINV_FREE))
+ return;
+
+ if (!pe || !pe->tce_invalidate)
+ return;
+
+ pe->tce_invalidate(pe, tbl, startp, endp, rm);
+}
+
static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
unsigned long uaddr, enum dma_data_direction direction,
struct dma_attrs *attrs, bool rm)
@@ -570,12 +591,7 @@ static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
*(tcep++) = cpu_to_be64(proto_tce |
(rpn++ << tbl->it_page_shift));
- /* Some implementations won't cache invalid TCEs and thus may not
- * need that flush. We'll probably turn it_type into a bit mask
- * of flags if that becomes the case
- */
- if (tbl->it_type & TCE_PCI_SWINV_CREATE)
- pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm);
+ pnv_tce_invalidate(tbl, tces, tcep - 1, rm);
return 0;
}
@@ -599,8 +615,7 @@ static void pnv_tce_free(struct iommu_table *tbl, long index, long npages,
while (npages--)
*(tcep++) = cpu_to_be64(0);
- if (tbl->it_type & TCE_PCI_SWINV_FREE)
- pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm);
+ pnv_tce_invalidate(tbl, tces, tcep - 1, rm);
}
static void pnv_tce_free_vm(struct iommu_table *tbl, long index, long npages)
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 6f5ff69..32847a5 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -22,6 +22,16 @@ enum pnv_phb_model {
#define PNV_IODA_PE_BUS (1 << 1) /* PE has primary PCI bus */
#define PNV_IODA_PE_BUS_ALL (1 << 2) /* PE has subordinate buses */
+struct pnv_ioda_pe;
+typedef void (*pnv_invalidate_fn)(struct pnv_ioda_pe *pe,
+ struct iommu_table *tbl,
+ __be64 *startp, __be64 *endp, bool rm);
+
+struct pnv_iommu_table {
+ struct iommu_table table;
+ struct pnv_ioda_pe *pe;
+};
+
/* Data associated with a PE, including IOMMU tracking etc.. */
struct pnv_phb;
struct pnv_ioda_pe {
@@ -49,9 +59,10 @@ struct pnv_ioda_pe {
unsigned int dma_weight;
/* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
+ pnv_invalidate_fn tce_invalidate;
int tce32_seg;
int tce32_segcount;
- struct iommu_table tce32_table;
+ struct pnv_iommu_table tce32;
phys_addr_t tce_inval_reg_phys;
/* 64-bit TCE bypass region */
--
2.0.0
More information about the Linuxppc-dev
mailing list