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All Octeon chips can support more than 4GB of RAM. Also due to how Octeon PCI is setup, even some configurations with less than 4GB of RAM will have portions that are not accessible from 32-bit devices. Enable the swiotlb code to handle the cases where a device cannot directly do DMA. This is a complete rewrite of the Octeon DMA mapping code. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Patchwork: http://patchwork.linux-mips.org/patch/1639/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2005-2009 Cavium Networks
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*/
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#ifndef __PCI_OCTEON_H__
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#define __PCI_OCTEON_H__
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#include <linux/pci.h>
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/* Some PCI cards require delays when accessing config space. */
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#define PCI_CONFIG_SPACE_DELAY 10000
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/*
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* The physical memory base mapped by BAR1. 256MB at the end of the
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* first 4GB.
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*/
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#define CVMX_PCIE_BAR1_PHYS_BASE ((1ull << 32) - (1ull << 28))
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#define CVMX_PCIE_BAR1_PHYS_SIZE (1ull << 28)
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/*
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* The RC base of BAR1. gen1 has a 39-bit BAR2, gen2 has 41-bit BAR2,
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* place BAR1 so it is the same for both.
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*/
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#define CVMX_PCIE_BAR1_RC_BASE (1ull << 41)
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/*
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* pcibios_map_irq() is defined inside pci-octeon.c. All it does is
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* call the Octeon specific version pointed to by this variable. This
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* function needs to change for PCI or PCIe based hosts.
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*/
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extern int (*octeon_pcibios_map_irq)(const struct pci_dev *dev,
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u8 slot, u8 pin);
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/*
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* For PCI (not PCIe) the BAR2 base address.
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*/
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#define OCTEON_BAR2_PCI_ADDRESS 0x8000000000ull
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/*
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* For PCI (not PCIe) the base of the memory mapped by BAR1
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*/
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extern u64 octeon_bar1_pci_phys;
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/*
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* The following defines are used when octeon_dma_bar_type =
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* OCTEON_DMA_BAR_TYPE_BIG
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*/
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#define OCTEON_PCI_BAR1_HOLE_BITS 5
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#define OCTEON_PCI_BAR1_HOLE_SIZE (1ul<<(OCTEON_PCI_BAR1_HOLE_BITS+3))
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enum octeon_dma_bar_type {
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OCTEON_DMA_BAR_TYPE_INVALID,
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OCTEON_DMA_BAR_TYPE_SMALL,
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OCTEON_DMA_BAR_TYPE_BIG,
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OCTEON_DMA_BAR_TYPE_PCIE
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};
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/*
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* This tells the DMA mapping system in dma-octeon.c how to map PCI
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* DMA addresses.
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*/
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extern enum octeon_dma_bar_type octeon_dma_bar_type;
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#endif
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