0106045bad
The modular lx_kit seperates the required back end functionality of the Linux emulation environment from the front end. Thereby each driver can reuse specific parts or supply more suitable implementations by itself. It is used to reduce the amount of redundant code in each driver. The lx_kit is split into several layers whose structure is as follows: The first layer in _repos/dde_linux/src/include/lx_emul_ contains those header files that provide the structural definitions and function declarations of the Linux API, e.g. _errno.h_ provides all error code values. The second layer in _repos/dde_linux/src/include/lx_emul/impl_ contains the implementation of selected functions, e.g. _slab.h_ provides the implementation of 'kmalloc()'. The lx_kit back end API is the third layer and provides the _Lx::Malloc_ interface (_repos/dde_linux/src/include/lx_kit/malloc.h_) which is used to implement 'kmalloc()'. There are several generic implementations of the lx_kit interfaces that can be used by a driver. A driver typically includes a 'lx_emul/impl/xyz.h' header once directly in its lx_emul compilation unit. The lx_kit interface files are only included in those compilation units that use or implement the interface. If a driver wants to use a generic implementation it must add the source file to its source file list. The generic implementations are located in _repos/dde_linux/src/lx_kit/_. The modular lx_kit still depends on the private _lx_emul.h_ header file that is tailored to each driver. Since the lx_kit already contains much of the declarations and definitions that were originally placed in these private header files, those files can now ommit a large amount of code. Fixes #1974.
143 lines
2.9 KiB
C++
143 lines
2.9 KiB
C++
/*
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* \brief Implementation of linux/pci.h
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* \author Norman Feske
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* \date 2015-09-09
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*/
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/*
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* Copyright (C) 2015-2016 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Linux kit includes */
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#include <lx_kit/pci_dev_registry.h>
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#include <lx_kit/mapped_io_mem_range.h>
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extern void pci_dev_put(struct pci_dev *pci_dev)
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{
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Genode::destroy(Genode::env()->heap(), pci_dev);
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}
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extern "C" size_t pci_resource_start(struct pci_dev *dev, unsigned bar)
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{
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if (bar >= DEVICE_COUNT_RESOURCE)
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return 0;
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return dev->resource[bar].start;
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}
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extern "C" size_t pci_resource_end(struct pci_dev *dev, unsigned bar)
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{
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if (bar >= DEVICE_COUNT_RESOURCE)
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return 0;
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return dev->resource[bar].end;
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}
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extern "C" size_t pci_resource_len(struct pci_dev *dev, unsigned bar)
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{
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size_t start = pci_resource_start(dev, bar);
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if (!start)
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return 0;
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return (dev->resource[bar].end - start) + 1;
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}
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extern "C" void *pci_ioremap_bar(struct pci_dev *dev, int bar)
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{
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using namespace Genode;
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if (bar >= DEVICE_COUNT_RESOURCE || bar < 0)
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return 0;
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return Lx::ioremap(pci_resource_start(dev, bar),
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pci_resource_len(dev, bar),
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Genode::UNCACHED);
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}
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extern "C" unsigned int pci_resource_flags(struct pci_dev *dev, unsigned bar)
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{
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if (bar >= DEVICE_COUNT_RESOURCE)
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return 0;
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return dev->resource[bar].flags;
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}
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extern "C" int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int, int where, u8 *val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)bus;
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dev->config_read(where, val);
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return 0;
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}
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extern "C" int pci_bus_read_config_word(struct pci_bus *bus, unsigned int, int where, u16 *val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)bus;
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dev->config_read(where, val);
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return 0;
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}
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extern "C" int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int, int where, u32 *val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)bus;
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dev->config_read(where, val);
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return 0;
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}
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extern "C" int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int, int where, u8 val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)bus;
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dev->config_write(where, val);
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return 0;
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}
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extern "C" int pci_bus_write_config_word(struct pci_bus *bus, unsigned int, int where, u16 val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)bus;
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dev->config_write(where, val);
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return 0;
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}
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extern "C" int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int, int where, u32 val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)bus;
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dev->config_write(where, val);
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return 0;
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}
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extern "C" const char *pci_name(const struct pci_dev *pdev)
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{
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/* simply return driver name */
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return "dummy";
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}
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extern "C" int pcie_capability_read_word(struct pci_dev *pdev, int pos, u16 *val)
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{
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Lx::Pci_dev *dev = (Lx::Pci_dev *)pdev->bus;
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switch (pos) {
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case PCI_EXP_LNKCTL:
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dev->config_read(pdev->pcie_cap + PCI_EXP_LNKCTL, val);
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return 0;
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break;
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default:
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break;
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}
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return 1;
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}
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