2168ed8e7d
PCI/PCIe have better performance and more devices support, such as NVMe, GPU, Powerful NIC (Like RDMA). PCI/PCIe can access control by IOMMU that the virtualiztion and userspace driver will more safety. PCI/PCIe device could hot plugging, no design modifications SoC required, PCI/PCIe on Embedded SoC is popular now. We make a simple framework to support them. Feature Lists: 1.PCI INTx: the INT[A-D] pin IRQ for legacy PCI, work with platform PIC. 2.MSI/MSI-X: the message write IRQ for PCIe, work with platform's PIC. 3.PME: we only support the D0, D1, D2, D3HOT, D3COLD init by framework. 4.Endpoint: a simple EP framework for PCI FPGA or NTB function. 5.OFW: we only support work on OFW SoC, ACPI support in the future maybe. Host controller: 1. Common PCI host controller on ECAM. 2. Generic PCI host controller on ECAM. Signed-off-by: GuEe-GUI <2991707448@qq.com>
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-10-24 GuEe-GUI first version
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*/
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#include <rtthread.h>
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#include "../ecam.h"
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rt_err_t pci_host_common_probe(struct rt_platform_device *pdev)
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{
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void *base;
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rt_err_t err;
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struct rt_device *dev = &pdev->parent;
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struct pci_ecam_config_window *conf_win;
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struct rt_pci_host_bridge *host_bridge = rt_pci_host_bridge_alloc(0);
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if (!host_bridge)
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{
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return -RT_ENOMEM;
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}
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if (!(base = rt_dm_dev_iomap(dev, 0)))
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{
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err = -RT_EIO;
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goto _fail;
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}
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host_bridge->parent.ofw_node = dev->ofw_node;
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if ((err = rt_pci_host_bridge_init(host_bridge)))
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{
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goto _fail;
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}
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host_bridge->sysdata = conf_win = pci_ecam_create(host_bridge,
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(const struct pci_ecam_ops *)pdev->id->data);
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if (!conf_win)
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{
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err = -RT_ENOMEM;
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goto _fail;
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}
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conf_win->win = base;
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conf_win->priv = host_bridge;
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if ((err = rt_pci_host_bridge_probe(host_bridge)))
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{
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goto _fail;
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}
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dev->user_data = host_bridge;
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return RT_EOK;
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_fail:
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if (base)
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{
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rt_iounmap(base);
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}
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rt_pci_host_bridge_free(host_bridge);
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return err;
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}
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rt_err_t pci_host_common_remove(struct rt_platform_device *pdev)
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{
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struct pci_ecam_config_window *conf_win;
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struct rt_pci_host_bridge *host_bridge = pdev->parent.user_data;
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rt_pci_host_bridge_remove(host_bridge);
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conf_win = host_bridge->sysdata;
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rt_iounmap(conf_win->win);
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rt_pci_host_bridge_free(host_bridge);
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return RT_EOK;
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}
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