ia64: remove the zx1 swiotlb machvec

[sfrench/cifs-2.6.git] / arch / ia64 / hp / common / hwsw_iommu.c

diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c
deleted file mode 100644 (file)
index 8840ed9..0000000
--- a/arch/ia64/hp/common/hwsw_iommu.c
+++ /dev/null
@@ -1,60 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
- *   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * This is a pseudo I/O MMU which dispatches to the hardware I/O MMU
- * whenever possible.  We assume that the hardware I/O MMU requires
- * full 32-bit addressability, as is the case, e.g., for HP zx1-based
- * systems (there, the I/O MMU window is mapped at 3-4GB).  If a
- * device doesn't provide full 32-bit addressability, we fall back on
- * the sw I/O TLB.  This is good enough to let us support broken
- * hardware such as soundcards which have a DMA engine that can
- * address only 28 bits.
- */
-
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/swiotlb.h>
-#include <linux/export.h>
-#include <asm/machvec.h>
-
-extern const struct dma_map_ops sba_dma_ops;
-
-/* swiotlb declarations & definitions: */
-extern int swiotlb_late_init_with_default_size (size_t size);
-
-/*
- * Note: we need to make the determination of whether or not to use
- * the sw I/O TLB based purely on the device structure.  Anything else
- * would be unreliable or would be too intrusive.
- */
-static inline int use_swiotlb(struct device *dev)
-{
-       return dev && dev->dma_mask &&
-               !sba_dma_ops.dma_supported(dev, *dev->dma_mask);
-}
-
-const struct dma_map_ops *hwsw_dma_get_ops(struct device *dev)
-{
-       if (use_swiotlb(dev))
-               return NULL;
-       return &sba_dma_ops;
-}
-EXPORT_SYMBOL(hwsw_dma_get_ops);
-
-void __init
-hwsw_init (void)
-{
-       /* default to a smallish 2MB sw I/O TLB */
-       if (swiotlb_late_init_with_default_size (2 * (1<<20)) != 0) {
-#ifdef CONFIG_IA64_GENERIC
-               /* Better to have normal DMA than panic */
-               printk(KERN_WARNING "%s: Failed to initialize software I/O TLB,"
-                      " reverting to hpzx1 platform vector\n", __func__);
-               machvec_init("hpzx1");
-#else
-               panic("Unable to initialize software I/O TLB services");
-#endif
-       }
-}