41bb38fc53
This change uses the TRIO IOMMU to map the PCI DMA space and physical memory at different addresses. We also now use the dma_mapping_ops to provide support for non-PCI DMA, PCIe DMA (64-bit) and legacy PCI DMA (32-bit). We use the kernel's software I/O TLB framework (i.e. bounce buffers) for the legacy 32-bit PCI device support since there are a limited number of TLB entries in the IOMMU and it is non-trivial to handle indexing, searching, matching, etc. For 32-bit devices the performance impact of bounce buffers should not be a concern. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
33 lines
989 B
C
33 lines
989 B
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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* Arch specific extensions to struct device
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*/
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#ifndef _ASM_TILE_DEVICE_H
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#define _ASM_TILE_DEVICE_H
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struct dev_archdata {
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/* DMA operations on that device */
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struct dma_map_ops *dma_ops;
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/* Offset of the DMA address from the PA. */
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dma_addr_t dma_offset;
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/* Highest DMA address that can be generated by this device. */
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dma_addr_t max_direct_dma_addr;
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};
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struct pdev_archdata {
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};
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#endif /* _ASM_TILE_DEVICE_H */
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