Current iommu_table of a PE is a static field. This will have a problem when
iommu_free_table is called.
This patch allocate iommu_table dynamically.
Signed-off-by: Wei Yang <weiy...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/iommu.h | 3 +++
arch/powerpc/platforms/powernv/pci-ioda.c | 26 ++++++++++++++------------
arch/powerpc/platforms/powernv/pci.h | 2 +-
3 files changed, 18 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 42632c7..0fedacb 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -78,6 +78,9 @@ struct iommu_table {
struct iommu_group *it_group;
#endif
void (*set_bypass)(struct iommu_table *tbl, bool enable);
+#ifdef CONFIG_PPC_POWERNV
+ void *data;
+#endif
};
/* Pure 2^n version of get_order */
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c
b/arch/powerpc/platforms/powernv/pci-ioda.c
index df49dc6..6d35ed9 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -785,6 +785,10 @@ static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int
all)
return;
}
+ pe->tce32_table = kzalloc_node(sizeof(struct iommu_table),
+ GFP_KERNEL, hose->node);
+ pe->tce32_table->data = pe;
+
/* Associate it with all child devices */
pnv_ioda_setup_same_PE(bus, pe);
@@ -858,7 +862,7 @@ 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_and_group(&pdev->dev, &pe->tce32_table);
+ set_iommu_table_base_and_group(&pdev->dev, pe->tce32_table);
}
static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb,
@@ -885,7 +889,7 @@ 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);
}
*pdev->dev.dma_mask = dma_mask;
return 0;
@@ -922,9 +926,9 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
list_for_each_entry(dev, &bus->devices, bus_list) {
if (add_to_iommu_group)
set_iommu_table_base_and_group(&dev->dev,
- &pe->tce32_table);
+ pe->tce32_table);
else
- set_iommu_table_base(&dev->dev, &pe->tce32_table);
+ set_iommu_table_base(&dev->dev, pe->tce32_table);
if (dev->subordinate)
pnv_ioda_setup_bus_dma(pe, dev->subordinate,
@@ -1014,8 +1018,7 @@ 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_ioda_pe *pe = tbl->data;
struct pnv_phb *phb = pe->phb;
if (phb->type == PNV_PHB_IODA1)
@@ -1081,7 +1084,7 @@ 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);
@@ -1119,8 +1122,7 @@ 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);
+ struct pnv_ioda_pe *pe = tbl->data;
uint16_t window_id = (pe->pe_number << 1 ) + 1;
int64_t rc;
@@ -1165,10 +1167,10 @@ 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,
@@ -1216,7 +1218,7 @@ 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);
diff --git a/arch/powerpc/platforms/powernv/pci.h
b/arch/powerpc/platforms/powernv/pci.h
index 9dc4143..0f24a14 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -53,7 +53,7 @@ struct pnv_ioda_pe {
/* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
int tce32_seg;
int tce32_segcount;
- struct iommu_table tce32_table;
+ struct iommu_table *tce32_table;
phys_addr_t tce_inval_reg_phys;
/* 64-bit TCE bypass region */
--
1.7.9.5
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