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-bcma.c (2521B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2015 Broadcom Corporation
      4 * Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
      5 */
      6
      7#include <linux/kernel.h>
      8#include <linux/pci.h>
      9#include <linux/module.h>
     10#include <linux/slab.h>
     11#include <linux/phy/phy.h>
     12#include <linux/bcma/bcma.h>
     13#include <linux/ioport.h>
     14
     15#include "pcie-iproc.h"
     16
     17
     18/* NS: CLASS field is R/O, and set to wrong 0x200 value */
     19static void bcma_pcie2_fixup_class(struct pci_dev *dev)
     20{
     21	dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL;
     22}
     23DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8011, bcma_pcie2_fixup_class);
     24DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8012, bcma_pcie2_fixup_class);
     25
     26static int iproc_bcma_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
     27{
     28	struct iproc_pcie *pcie = dev->sysdata;
     29	struct bcma_device *bdev = container_of(pcie->dev, struct bcma_device, dev);
     30
     31	return bcma_core_irq(bdev, 5);
     32}
     33
     34static int iproc_bcma_pcie_probe(struct bcma_device *bdev)
     35{
     36	struct device *dev = &bdev->dev;
     37	struct iproc_pcie *pcie;
     38	struct pci_host_bridge *bridge;
     39	int ret;
     40
     41	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
     42	if (!bridge)
     43		return -ENOMEM;
     44
     45	pcie = pci_host_bridge_priv(bridge);
     46
     47	pcie->dev = dev;
     48
     49	pcie->type = IPROC_PCIE_PAXB_BCMA;
     50	pcie->base = bdev->io_addr;
     51	if (!pcie->base) {
     52		dev_err(dev, "no controller registers\n");
     53		return -ENOMEM;
     54	}
     55
     56	pcie->base_addr = bdev->addr;
     57
     58	pcie->mem.start = bdev->addr_s[0];
     59	pcie->mem.end = bdev->addr_s[0] + SZ_128M - 1;
     60	pcie->mem.name = "PCIe MEM space";
     61	pcie->mem.flags = IORESOURCE_MEM;
     62	pci_add_resource(&bridge->windows, &pcie->mem);
     63	ret = devm_request_pci_bus_resources(dev, &bridge->windows);
     64	if (ret)
     65		return ret;
     66
     67	pcie->map_irq = iproc_bcma_pcie_map_irq;
     68
     69	bcma_set_drvdata(bdev, pcie);
     70
     71	return iproc_pcie_setup(pcie, &bridge->windows);
     72}
     73
     74static void iproc_bcma_pcie_remove(struct bcma_device *bdev)
     75{
     76	struct iproc_pcie *pcie = bcma_get_drvdata(bdev);
     77
     78	iproc_pcie_remove(pcie);
     79}
     80
     81static const struct bcma_device_id iproc_bcma_pcie_table[] = {
     82	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_PCIEG2, BCMA_ANY_REV, BCMA_ANY_CLASS),
     83	{},
     84};
     85MODULE_DEVICE_TABLE(bcma, iproc_bcma_pcie_table);
     86
     87static struct bcma_driver iproc_bcma_pcie_driver = {
     88	.name		= KBUILD_MODNAME,
     89	.id_table	= iproc_bcma_pcie_table,
     90	.probe		= iproc_bcma_pcie_probe,
     91	.remove		= iproc_bcma_pcie_remove,
     92};
     93module_bcma_driver(iproc_bcma_pcie_driver);
     94
     95MODULE_AUTHOR("Hauke Mehrtens");
     96MODULE_DESCRIPTION("Broadcom iProc PCIe BCMA driver");
     97MODULE_LICENSE("GPL v2");