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Diffstat (limited to 'pci-arbiter/pci_access.h')
| -rw-r--r-- | pci-arbiter/pci_access.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/pci-arbiter/pci_access.h b/pci-arbiter/pci_access.h new file mode 100644 index 00000000..cf42cf62 --- /dev/null +++ b/pci-arbiter/pci_access.h @@ -0,0 +1,187 @@ +/* + * (C) Copyright IBM Corporation 2006 + * Copyright 2009 Red Hat, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * on the rights to use, copy, modify, merge, publish, distribute, sub + * license, and/or sell copies of the Software, and to permit persons to whom + * the Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ +/* + * Copyright (c) 2007 Paulo R. Zanoni, Tiago Vignatti + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + */ + +/* + * PCI access general header. + * + * Following code is borrowed from libpciaccess: + * https://cgit.freedesktop.org/xorg/lib/libpciaccess/ + */ + +#ifndef PCI_ACCESS_H +#define PCI_ACCESS_H + +#include <stddef.h> +#include <stdint.h> +#include <errno.h> + +typedef uint64_t pciaddr_t; + +/* + * BAR descriptor for a PCI device. + */ +struct pci_mem_region +{ + /* + * When the region is mapped, this is the pointer to the memory. + */ + void *memory; + + /* + * Base physical address of the region from the CPU's point of view. + * + * This address is typically passed to \c pci_device_map_range to create + * a mapping of the region to the CPU's virtual address space. + */ + pciaddr_t base_addr; + + + /* + * Size, in bytes, of the region. + */ + pciaddr_t size; + + + /* + * Is the region I/O ports or memory? + */ + unsigned is_IO:1; + + /* + * Is the memory region prefetchable? + * + * \note + * This can only be set if \c is_IO is not set. + */ + unsigned is_prefetchable:1; + + + /* + * Is the memory at a 64-bit address? + * + * \note + * This can only be set if \c is_IO is not set. + */ + unsigned is_64:1; +}; + +/* + * PCI device. + * + * Contains all of the information about a particular PCI device. + */ +struct pci_device +{ + /* + * Complete bus identification, including domain, of the device. On + * platforms that do not support PCI domains (e.g., 32-bit x86 hardware), + * the domain will always be zero. + */ + uint16_t domain; + uint8_t bus; + uint8_t dev; + uint8_t func; + + /* + * Device's class, subclass, and programming interface packed into a + * single 32-bit value. The class is at bits [23:16], subclass is at + * bits [15:8], and programming interface is at [7:0]. + */ + uint32_t device_class; + + /* + * BAR descriptors for the device. + */ + struct pci_mem_region regions[6]; + + /* + * Size, in bytes, of the device's expansion ROM. + */ + pciaddr_t rom_size; + + /* + * Physical address of the ROM + */ + pciaddr_t rom_base; + + /* + * Mapped ROM + */ + void *rom_memory; + + /* + * Size of the configuration space + */ + size_t config_size; +}; + +typedef error_t (*pci_io_op_t) (unsigned bus, unsigned dev, unsigned func, + pciaddr_t reg, void *data, unsigned size); + +typedef error_t (*pci_refresh_dev_op_t) (struct pci_device * dev, + int num_region, int rom); + +/* Global PCI data */ +struct pci_system +{ + size_t num_devices; + struct pci_device *devices; + + /* Callbacks */ + pci_io_op_t read; + pci_io_op_t write; + pci_refresh_dev_op_t device_refresh; +}; + +struct pci_system *pci_sys; + +int pci_system_init (void); + +#endif /* PCI_ACCESS_H */ |