drivers/misc/intel/gna/pci.c

// SPDX-License-Identifier: GPL-2.0-only
// Copyright(c) 2017-2021 Intel Corporation

#include <linux/module.h>
#include <linux/pci.h>

#include "device.h"
#include "hw.h"
#include "pci.h"

static const struct gna_dev_info cnl_dev_info = {
	.hwid = GNA_DEV_HWID_CNL,
	GNA_GEN1_FEATURES
};

static const struct gna_dev_info glk_dev_info = {
	.hwid = GNA_DEV_HWID_GLK,
	GNA_GEN1_FEATURES
};

static const struct gna_dev_info ehl_dev_info = {
	.hwid = GNA_DEV_HWID_EHL,
	GNA_GEN1_FEATURES
};

static const struct gna_dev_info icl_dev_info = {
	.hwid = GNA_DEV_HWID_ICL,
	GNA_GEN1_FEATURES
};

static const struct gna_dev_info jsl_dev_info = {
	.hwid = GNA_DEV_HWID_JSL,
	GNA_GEN2_FEATURES
};

static const struct gna_dev_info tgl_dev_info = {
	.hwid = GNA_DEV_HWID_TGL,
	GNA_GEN2_FEATURES
};

static const struct gna_dev_info rkl_dev_info = {
	.hwid = GNA_DEV_HWID_RKL,
	GNA_GEN2_FEATURES
};

static const struct gna_dev_info adl_dev_info = {
	.hwid = GNA_DEV_HWID_ADL,
	GNA_GEN2_FEATURES
};

static const struct gna_dev_info rpl_dev_info = {
	.hwid = GNA_DEV_HWID_RPL,
	GNA_GEN2_FEATURES
};

#define INTEL_GNA_DEVICE(hwid, info)				\
	{ PCI_VDEVICE(INTEL, hwid), (kernel_ulong_t)(info) }

static const struct pci_device_id gna_pci_ids[] = {
	INTEL_GNA_DEVICE(GNA_DEV_HWID_CNL, &cnl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_EHL, &ehl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_GLK, &glk_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_ICL, &icl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_JSL, &jsl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_TGL, &tgl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_RKL, &rkl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_ADL, &adl_dev_info),
	INTEL_GNA_DEVICE(GNA_DEV_HWID_RPL, &rpl_dev_info),
	{ }
};

static void gna_pcim_free_irq_vectors(void *data)
{
	struct pci_dev *pcidev = data;

	pci_free_irq_vectors(pcidev);
}

static int gna_pcim_alloc_irq_vectors(struct pci_dev *pcidev)
{
	int ret;

	ret = pci_alloc_irq_vectors(pcidev, 1, 1, PCI_IRQ_ALL_TYPES);
	if (ret < 0)
		return ret;

	ret = devm_add_action(&pcidev->dev, gna_pcim_free_irq_vectors, pcidev);
	if (ret)
		gna_pcim_free_irq_vectors(pcidev);

	return ret;
}

int gna_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *pci_id)
{
	struct gna_dev_info *dev_info;
	void __iomem *iobase;
	int irq;
	int ret;

	ret = pcim_enable_device(pcidev);
	if (ret) {
		dev_err(&pcidev->dev, "pci device can't be enabled\n");
		return ret;
	}

	ret = pcim_iomap_regions(pcidev, BIT(0), pci_name(pcidev));
	if (ret) {
		dev_err(&pcidev->dev, "cannot iomap regions\n");
		return ret;
	}

	iobase = pcim_iomap_table(pcidev)[0];

	pci_set_master(pcidev);

	ret = gna_pcim_alloc_irq_vectors(pcidev);
	if (ret < 0)
		return ret;

	irq = pci_irq_vector(pcidev, 0);
	if (unlikely(irq < 0)) {
		dev_err(&pcidev->dev, "could not get irq number\n");
		return -EIO;
	}

	dev_info = (struct gna_dev_info *)pci_id->driver_data;

	ret = gna_probe(&pcidev->dev, dev_info, iobase, irq);
	if (ret) {
		dev_err(&pcidev->dev, "could not initialize device\n");
		return ret;
	}

	return 0;
}

static struct pci_driver gna_pci_driver = {
	.name = GNA_DV_NAME,
	.id_table = gna_pci_ids,
	.probe = gna_pci_probe,
	.driver = {
		.pm = &gna_pm,
	},
};

module_pci_driver(gna_pci_driver);

MODULE_DEVICE_TABLE(pci, gna_pci_ids);