cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pcie-iproc-platform.c (3559B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2015 Broadcom Corporation
      4 */
      5
      6#include <linux/kernel.h>
      7#include <linux/pci.h>
      8#include <linux/clk.h>
      9#include <linux/module.h>
     10#include <linux/slab.h>
     11#include <linux/interrupt.h>
     12#include <linux/platform_device.h>
     13#include <linux/of_address.h>
     14#include <linux/of_pci.h>
     15#include <linux/of_irq.h>
     16#include <linux/of_platform.h>
     17#include <linux/phy/phy.h>
     18
     19#include "../pci.h"
     20#include "pcie-iproc.h"
     21
     22static const struct of_device_id iproc_pcie_of_match_table[] = {
     23	{
     24		.compatible = "brcm,iproc-pcie",
     25		.data = (int *)IPROC_PCIE_PAXB,
     26	}, {
     27		.compatible = "brcm,iproc-pcie-paxb-v2",
     28		.data = (int *)IPROC_PCIE_PAXB_V2,
     29	}, {
     30		.compatible = "brcm,iproc-pcie-paxc",
     31		.data = (int *)IPROC_PCIE_PAXC,
     32	}, {
     33		.compatible = "brcm,iproc-pcie-paxc-v2",
     34		.data = (int *)IPROC_PCIE_PAXC_V2,
     35	},
     36	{ /* sentinel */ }
     37};
     38MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
     39
     40static int iproc_pltfm_pcie_probe(struct platform_device *pdev)
     41{
     42	struct device *dev = &pdev->dev;
     43	struct iproc_pcie *pcie;
     44	struct device_node *np = dev->of_node;
     45	struct resource reg;
     46	struct pci_host_bridge *bridge;
     47	int ret;
     48
     49	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
     50	if (!bridge)
     51		return -ENOMEM;
     52
     53	pcie = pci_host_bridge_priv(bridge);
     54
     55	pcie->dev = dev;
     56	pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
     57
     58	ret = of_address_to_resource(np, 0, &reg);
     59	if (ret < 0) {
     60		dev_err(dev, "unable to obtain controller resources\n");
     61		return ret;
     62	}
     63
     64	pcie->base = devm_pci_remap_cfgspace(dev, reg.start,
     65					     resource_size(&reg));
     66	if (!pcie->base) {
     67		dev_err(dev, "unable to map controller registers\n");
     68		return -ENOMEM;
     69	}
     70	pcie->base_addr = reg.start;
     71
     72	if (of_property_read_bool(np, "brcm,pcie-ob")) {
     73		u32 val;
     74
     75		ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
     76					   &val);
     77		if (ret) {
     78			dev_err(dev,
     79				"missing brcm,pcie-ob-axi-offset property\n");
     80			return ret;
     81		}
     82		pcie->ob.axi_offset = val;
     83		pcie->need_ob_cfg = true;
     84	}
     85
     86	/*
     87	 * DT nodes are not used by all platforms that use the iProc PCIe
     88	 * core driver. For platforms that require explicit inbound mapping
     89	 * configuration, "dma-ranges" would have been present in DT
     90	 */
     91	pcie->need_ib_cfg = of_property_read_bool(np, "dma-ranges");
     92
     93	/* PHY use is optional */
     94	pcie->phy = devm_phy_optional_get(dev, "pcie-phy");
     95	if (IS_ERR(pcie->phy))
     96		return PTR_ERR(pcie->phy);
     97
     98	/* PAXC doesn't support legacy IRQs, skip mapping */
     99	switch (pcie->type) {
    100	case IPROC_PCIE_PAXC:
    101	case IPROC_PCIE_PAXC_V2:
    102		pcie->map_irq = NULL;
    103		break;
    104	default:
    105		break;
    106	}
    107
    108	ret = iproc_pcie_setup(pcie, &bridge->windows);
    109	if (ret) {
    110		dev_err(dev, "PCIe controller setup failed\n");
    111		return ret;
    112	}
    113
    114	platform_set_drvdata(pdev, pcie);
    115	return 0;
    116}
    117
    118static int iproc_pltfm_pcie_remove(struct platform_device *pdev)
    119{
    120	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
    121
    122	return iproc_pcie_remove(pcie);
    123}
    124
    125static void iproc_pltfm_pcie_shutdown(struct platform_device *pdev)
    126{
    127	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
    128
    129	iproc_pcie_shutdown(pcie);
    130}
    131
    132static struct platform_driver iproc_pltfm_pcie_driver = {
    133	.driver = {
    134		.name = "iproc-pcie",
    135		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
    136	},
    137	.probe = iproc_pltfm_pcie_probe,
    138	.remove = iproc_pltfm_pcie_remove,
    139	.shutdown = iproc_pltfm_pcie_shutdown,
    140};
    141module_platform_driver(iproc_pltfm_pcie_driver);
    142
    143MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
    144MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
    145MODULE_LICENSE("GPL v2");