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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2021 Intel Corporation. All rights reserved. */
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include <cxl.h>
#include "test/mock.h"
struct acpi_device *to_cxl_host_bridge(struct device *host, struct device *dev)
{
int index;
struct acpi_device *adev, *found = NULL;
struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
if (ops && ops->is_mock_bridge(dev)) {
found = ACPI_COMPANION(dev);
goto out;
}
if (dev->bus == &platform_bus_type)
goto out;
adev = to_acpi_device(dev);
if (!acpi_pci_find_root(adev->handle))
goto out;
if (strcmp(acpi_device_hid(adev), "ACPI0016") == 0) {
found = adev;
dev_dbg(host, "found host bridge %s\n", dev_name(&adev->dev));
}
out:
put_cxl_mock_ops(index);
return found;
}
static int match_add_root_port(struct pci_dev *pdev, void *data)
{
struct cxl_walk_context *ctx = data;
struct pci_bus *root_bus = ctx->root;
struct cxl_port *port = ctx->port;
int type = pci_pcie_type(pdev);
struct device *dev = ctx->dev;
u32 lnkcap, port_num;
int rc;
if (pdev->bus != root_bus)
return 0;
if (!pci_is_pcie(pdev))
return 0;
if (type != PCI_EXP_TYPE_ROOT_PORT)
return 0;
if (pci_read_config_dword(pdev, pci_pcie_cap(pdev) + PCI_EXP_LNKCAP,
&lnkcap) != PCIBIOS_SUCCESSFUL)
return 0;
/* TODO walk DVSEC to find component register base */
port_num = FIELD_GET(PCI_EXP_LNKCAP_PN, lnkcap);
rc = cxl_add_dport(port, &pdev->dev, port_num, CXL_RESOURCE_NONE);
if (rc) {
dev_err(dev, "failed to add dport: %s (%d)\n",
dev_name(&pdev->dev), rc);
ctx->error = rc;
return rc;
}
ctx->count++;
dev_dbg(dev, "add dport%d: %s\n", port_num, dev_name(&pdev->dev));
return 0;
}
static int mock_add_root_port(struct platform_device *pdev, void *data)
{
struct cxl_walk_context *ctx = data;
struct cxl_port *port = ctx->port;
struct device *dev = ctx->dev;
int rc;
rc = cxl_add_dport(port, &pdev->dev, pdev->id, CXL_RESOURCE_NONE);
if (rc) {
dev_err(dev, "failed to add dport: %s (%d)\n",
dev_name(&pdev->dev), rc);
ctx->error = rc;
return rc;
}
ctx->count++;
dev_dbg(dev, "add dport%d: %s\n", pdev->id, dev_name(&pdev->dev));
return 0;
}
int match_add_root_ports(struct pci_dev *dev, void *data)
{
int index, rc;
struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
struct platform_device *pdev = (struct platform_device *) dev;
if (ops && ops->is_mock_port(pdev))
rc = mock_add_root_port(pdev, data);
else
rc = match_add_root_port(dev, data);
put_cxl_mock_ops(index);
return rc;
}
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