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Diffstat (limited to 'arch/x86/kernel/tce_64.c')
-rw-r--r--arch/x86/kernel/tce_64.c177
1 files changed, 0 insertions, 177 deletions
diff --git a/arch/x86/kernel/tce_64.c b/arch/x86/kernel/tce_64.c
deleted file mode 100644
index 6384be751eff..000000000000
--- a/arch/x86/kernel/tce_64.c
+++ /dev/null
@@ -1,177 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * This file manages the translation entries for the IBM Calgary IOMMU.
- *
- * Derived from arch/powerpc/platforms/pseries/iommu.c
- *
- * Copyright (C) IBM Corporation, 2006
- *
- * Author: Jon Mason <jdmason@us.ibm.com>
- * Author: Muli Ben-Yehuda <muli@il.ibm.com>
- */
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/string.h>
-#include <linux/pci.h>
-#include <linux/dma-mapping.h>
-#include <linux/memblock.h>
-#include <asm/tce.h>
-#include <asm/calgary.h>
-#include <asm/proto.h>
-#include <asm/cacheflush.h>
-
-/* flush a tce at 'tceaddr' to main memory */
-static inline void flush_tce(void* tceaddr)
-{
- /* a single tce can't cross a cache line */
- if (boot_cpu_has(X86_FEATURE_CLFLUSH))
- clflush(tceaddr);
- else
- wbinvd();
-}
-
-void tce_build(struct iommu_table *tbl, unsigned long index,
- unsigned int npages, unsigned long uaddr, int direction)
-{
- u64* tp;
- u64 t;
- u64 rpn;
-
- t = (1 << TCE_READ_SHIFT);
- if (direction != DMA_TO_DEVICE)
- t |= (1 << TCE_WRITE_SHIFT);
-
- tp = ((u64*)tbl->it_base) + index;
-
- while (npages--) {
- rpn = (virt_to_bus((void*)uaddr)) >> PAGE_SHIFT;
- t &= ~TCE_RPN_MASK;
- t |= (rpn << TCE_RPN_SHIFT);
-
- *tp = cpu_to_be64(t);
- flush_tce(tp);
-
- uaddr += PAGE_SIZE;
- tp++;
- }
-}
-
-void tce_free(struct iommu_table *tbl, long index, unsigned int npages)
-{
- u64* tp;
-
- tp = ((u64*)tbl->it_base) + index;
-
- while (npages--) {
- *tp = cpu_to_be64(0);
- flush_tce(tp);
- tp++;
- }
-}
-
-static inline unsigned int table_size_to_number_of_entries(unsigned char size)
-{
- /*
- * size is the order of the table, 0-7
- * smallest table is 8K entries, so shift result by 13 to
- * multiply by 8K
- */
- return (1 << size) << 13;
-}
-
-static int tce_table_setparms(struct pci_dev *dev, struct iommu_table *tbl)
-{
- unsigned int bitmapsz;
- unsigned long bmppages;
- int ret;
-
- tbl->it_busno = dev->bus->number;
-
- /* set the tce table size - measured in entries */
- tbl->it_size = table_size_to_number_of_entries(specified_table_size);
-
- /*
- * number of bytes needed for the bitmap size in number of
- * entries; we need one bit per entry
- */
- bitmapsz = tbl->it_size / BITS_PER_BYTE;
- bmppages = __get_free_pages(GFP_KERNEL, get_order(bitmapsz));
- if (!bmppages) {
- printk(KERN_ERR "Calgary: cannot allocate bitmap\n");
- ret = -ENOMEM;
- goto done;
- }
-
- tbl->it_map = (unsigned long*)bmppages;
-
- memset(tbl->it_map, 0, bitmapsz);
-
- tbl->it_hint = 0;
-
- spin_lock_init(&tbl->it_lock);
-
- return 0;
-
-done:
- return ret;
-}
-
-int __init build_tce_table(struct pci_dev *dev, void __iomem *bbar)
-{
- struct iommu_table *tbl;
- int ret;
-
- if (pci_iommu(dev->bus)) {
- printk(KERN_ERR "Calgary: dev %p has sysdata->iommu %p\n",
- dev, pci_iommu(dev->bus));
- BUG();
- }
-
- tbl = kzalloc(sizeof(struct iommu_table), GFP_KERNEL);
- if (!tbl) {
- printk(KERN_ERR "Calgary: error allocating iommu_table\n");
- ret = -ENOMEM;
- goto done;
- }
-
- ret = tce_table_setparms(dev, tbl);
- if (ret)
- goto free_tbl;
-
- tbl->bbar = bbar;
-
- set_pci_iommu(dev->bus, tbl);
-
- return 0;
-
-free_tbl:
- kfree(tbl);
-done:
- return ret;
-}
-
-void * __init alloc_tce_table(void)
-{
- unsigned int size;
-
- size = table_size_to_number_of_entries(specified_table_size);
- size *= TCE_ENTRY_SIZE;
-
- return memblock_alloc_low(size, size);
-}
-
-void __init free_tce_table(void *tbl)
-{
- unsigned int size;
-
- if (!tbl)
- return;
-
- size = table_size_to_number_of_entries(specified_table_size);
- size *= TCE_ENTRY_SIZE;
-
- memblock_free(__pa(tbl), size);
-}