powerpc/powernv: Move TCE manupulation code to its own file

Right now we have allocation code in pci-ioda.c and traversing code in
pci.c, let's keep them toghether. However both files are big enough
already so let's move this business to a new file.

While we at it, move the code which links IOMMU table groups to
IOMMU tables as it is not specific to any PNV PHB model.

These puts exported symbols from the new file together.

This fixes several warnings from checkpatch.pl like this:
"WARNING: Prefer 'unsigned int' to bare use of 'unsigned'".

As this is almost cut-n-paste, there should be no behavioral change.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 0 insertions, 158 deletions

diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index b265ecc0836a..13aef2323bbc 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -802,85 +802,6 @@ struct pci_ops pnv_pci_ops = {
 	.write = pnv_pci_write_config,
 };
 
-static __be64 *pnv_tce(struct iommu_table *tbl, long idx)
-{
-	__be64 *tmp = ((__be64 *)tbl->it_base);
-	int  level = tbl->it_indirect_levels;
-	const long shift = ilog2(tbl->it_level_size);
-	unsigned long mask = (tbl->it_level_size - 1) << (level * shift);
-
-	while (level) {
-		int n = (idx & mask) >> (level * shift);
-		unsigned long tce = be64_to_cpu(tmp[n]);
-
-		tmp = __va(tce & ~(TCE_PCI_READ | TCE_PCI_WRITE));
-		idx &= ~mask;
-		mask >>= shift;
-		--level;
-	}
-
-	return tmp + idx;
-}
-
-int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
-		unsigned long uaddr, enum dma_data_direction direction,
-		unsigned long attrs)
-{
-	u64 proto_tce = iommu_direction_to_tce_perm(direction);
-	u64 rpn = __pa(uaddr) >> tbl->it_page_shift;
-	long i;
-
-	if (proto_tce & TCE_PCI_WRITE)
-		proto_tce |= TCE_PCI_READ;
-
-	for (i = 0; i < npages; i++) {
-		unsigned long newtce = proto_tce |
-			((rpn + i) << tbl->it_page_shift);
-		unsigned long idx = index - tbl->it_offset + i;
-
-		*(pnv_tce(tbl, idx)) = cpu_to_be64(newtce);
-	}
-
-	return 0;
-}
-
-#ifdef CONFIG_IOMMU_API
-int pnv_tce_xchg(struct iommu_table *tbl, long index,
-		unsigned long *hpa, enum dma_data_direction *direction)
-{
-	u64 proto_tce = iommu_direction_to_tce_perm(*direction);
-	unsigned long newtce = *hpa | proto_tce, oldtce;
-	unsigned long idx = index - tbl->it_offset;
-
-	BUG_ON(*hpa & ~IOMMU_PAGE_MASK(tbl));
-
-	if (newtce & TCE_PCI_WRITE)
-		newtce |= TCE_PCI_READ;
-
-	oldtce = be64_to_cpu(xchg(pnv_tce(tbl, idx), cpu_to_be64(newtce)));
-	*hpa = oldtce & ~(TCE_PCI_READ | TCE_PCI_WRITE);
-	*direction = iommu_tce_direction(oldtce);
-
-	return 0;
-}
-#endif
-
-void pnv_tce_free(struct iommu_table *tbl, long index, long npages)
-{
-	long i;
-
-	for (i = 0; i < npages; i++) {
-		unsigned long idx = index - tbl->it_offset + i;
-
-		*(pnv_tce(tbl, idx)) = cpu_to_be64(0);
-	}
-}
-
-unsigned long pnv_tce_get(struct iommu_table *tbl, long index)
-{
-	return be64_to_cpu(*(pnv_tce(tbl, index - tbl->it_offset)));
-}
-
 struct iommu_table *pnv_pci_table_alloc(int nid)
 {
 	struct iommu_table *tbl;
@@ -895,85 +816,6 @@ struct iommu_table *pnv_pci_table_alloc(int nid)
 	return tbl;
 }
 
-long pnv_pci_link_table_and_group(int node, int num,
-		struct iommu_table *tbl,
-		struct iommu_table_group *table_group)
-{
-	struct iommu_table_group_link *tgl = NULL;
-
-	if (WARN_ON(!tbl || !table_group))
-		return -EINVAL;
-
-	tgl = kzalloc_node(sizeof(struct iommu_table_group_link), GFP_KERNEL,
-			node);
-	if (!tgl)
-		return -ENOMEM;
-
-	tgl->table_group = table_group;
-	list_add_rcu(&tgl->next, &tbl->it_group_list);
-
-	table_group->tables[num] = tbl;
-
-	return 0;
-}
-
-static void pnv_iommu_table_group_link_free(struct rcu_head *head)
-{
-	struct iommu_table_group_link *tgl = container_of(head,
-			struct iommu_table_group_link, rcu);
-
-	kfree(tgl);
-}
-
-void pnv_pci_unlink_table_and_group(struct iommu_table *tbl,
-		struct iommu_table_group *table_group)
-{
-	long i;
-	bool found;
-	struct iommu_table_group_link *tgl;
-
-	if (!tbl || !table_group)
-		return;
-
-	/* Remove link to a group from table's list of attached groups */
-	found = false;
-	list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) {
-		if (tgl->table_group == table_group) {
-			list_del_rcu(&tgl->next);
-			call_rcu(&tgl->rcu, pnv_iommu_table_group_link_free);
-			found = true;
-			break;
-		}
-	}
-	if (WARN_ON(!found))
-		return;
-
-	/* Clean a pointer to iommu_table in iommu_table_group::tables[] */
-	found = false;
-	for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) {
-		if (table_group->tables[i] == tbl) {
-			table_group->tables[i] = NULL;
-			found = true;
-			break;
-		}
-	}
-	WARN_ON(!found);
-}
-
-void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
-			       void *tce_mem, u64 tce_size,
-			       u64 dma_offset, unsigned page_shift)
-{
-	tbl->it_blocksize = 16;
-	tbl->it_base = (unsigned long)tce_mem;
-	tbl->it_page_shift = page_shift;
-	tbl->it_offset = dma_offset >> tbl->it_page_shift;
-	tbl->it_index = 0;
-	tbl->it_size = tce_size >> 3;
-	tbl->it_busno = 0;
-	tbl->it_type = TCE_PCI;
-}
-
 void pnv_pci_dma_dev_setup(struct pci_dev *pdev)
 {
 	struct pci_controller *hose = pci_bus_to_host(pdev->bus);