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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2023-2026 Intel Corporation */
#include <linux/device.h>
#include <linux/dev_printk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include "cdev.h"
#include "hw_heci.h"
#include "hw_heci_regs.h"
static int issei_heci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct device *dev = &pdev->dev;
const struct hw_heci_cfg *cfg;
struct issei_device *idev;
struct issei_heci_hw *hw;
char __iomem *registers;
int err;
cfg = issei_heci_get_cfg(ent->driver_data);
if (!cfg)
return dev_err_probe(dev, -ENODEV, "no usable configuration.\n");
err = pcim_enable_device(pdev);
if (err)
return dev_err_probe(dev, err, "failed to enable pci device.\n");
pci_set_master(pdev);
registers = pcim_iomap_region(pdev, 0, KBUILD_MODNAME);
if (IS_ERR(registers))
return dev_err_probe(dev, PTR_ERR(registers), "failed to get pci region.\n");
err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
if (err)
return dev_err_probe(dev, err, "no usable DMA configuration.\n");
idev = issei_register(sizeof(*hw), dev, &cfg->dma_length, issei_heci_get_ops());
if (IS_ERR(idev))
return dev_err_probe(dev, PTR_ERR(idev), "register failure.\n");
issei_heci_dev_init(idev, registers, cfg);
pci_set_drvdata(pdev, idev);
err = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
if (err < 0) {
dev_err_probe(dev, err, "pci_alloc_irq_vectors failure.\n");
goto deregister;
}
hw = to_heci_hw(idev);
hw->irq = pci_irq_vector(pdev, 0);
err = request_threaded_irq(hw->irq,
issei_heci_irq_quick_handler,
NULL,
IRQF_SHARED, KBUILD_MODNAME, idev);
if (err)
goto release_irq;
err = issei_start(idev);
if (err) {
dev_err_probe(dev, err, "init hw failure.\n");
goto free_irq;
}
return 0;
free_irq:
idev->ops->irq_disable(idev);
free_irq(hw->irq, idev);
release_irq:
pci_free_irq_vectors(pdev);
deregister:
issei_deregister(idev);
return err;
}
static void issei_heci_shutdown(struct pci_dev *pdev)
{
struct issei_device *idev = pci_get_drvdata(pdev);
struct issei_heci_hw *hw = to_heci_hw(idev);
issei_stop(idev);
idev->ops->irq_disable(idev);
free_irq(hw->irq, idev);
pci_free_irq_vectors(pdev);
}
static void issei_heci_remove(struct pci_dev *pdev)
{
issei_heci_shutdown(pdev);
issei_deregister(pci_get_drvdata(pdev));
}
static int issei_heci_pm_suspend(struct device *device)
{
struct issei_device *idev = dev_get_drvdata(device);
issei_stop(idev);
idev->ops->irq_disable(idev);
return 0;
}
static int issei_heci_pm_resume(struct device *device)
{
struct issei_device *idev = dev_get_drvdata(device);
return issei_start(idev);
}
static const struct dev_pm_ops issei_heci_pm_ops = {
SYSTEM_SLEEP_PM_OPS(issei_heci_pm_suspend, issei_heci_pm_resume)
};
static const struct pci_device_id heci_pci_tbl[] = {
{PCI_VDEVICE(INTEL, 0xA85D)}, /* Lunar Lake M */
{PCI_VDEVICE(INTEL, 0xE35D)}, /* Panther Lake H */
{PCI_VDEVICE(INTEL, 0xE45D)}, /* Panther Lake P */
{PCI_VDEVICE(INTEL, 0xD470)}, /* Nova Lake S */
{PCI_VDEVICE(INTEL, 0xD358)}, /* Nova Lake H */
{PCI_VDEVICE(INTEL, 0x4D5D)}, /* Wildcat Lake */
{}
};
MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
static struct pci_driver issei_heci_driver = {
.name = KBUILD_MODNAME,
.id_table = heci_pci_tbl,
.probe = issei_heci_probe,
.remove = issei_heci_remove,
.shutdown = issei_heci_shutdown,
.driver = {
.pm = &issei_heci_pm_ops,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_pci_driver(issei_heci_driver);
MODULE_DESCRIPTION("Intel(R) Silicon Security Engine Interface - HECI");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("INTEL_SSEI");
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