// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2025 Intel Corporation */
#include <linux/array_size.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/types.h>

#include <adf_accel_devices.h>
#include <adf_cfg.h>
#include <adf_common_drv.h>
#include <adf_dbgfs.h>

#include "adf_gen6_shared.h"
#include "adf_6xxx_hw_data.h"

static int bar_map[] = {
        0,      /* SRAM */
        2,      /* PMISC */
        4,      /* ETR */
};

static void adf_device_down(void *accel_dev)
{
        adf_dev_down(accel_dev);
}

static void adf_dbgfs_cleanup(void *accel_dev)
{
        adf_dbgfs_exit(accel_dev);
}

static void adf_cfg_device_remove(void *accel_dev)
{
        adf_cfg_dev_remove(accel_dev);
}

static void adf_cleanup_hw_data(void *accel_dev)
{
        struct adf_accel_dev *accel_device = accel_dev;

        if (accel_device->hw_device) {
                adf_clean_hw_data_6xxx(accel_device->hw_device);
                accel_device->hw_device = NULL;
        }
}

static void adf_devmgr_remove(void *accel_dev)
{
        adf_devmgr_rm_dev(accel_dev, NULL);
}

static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct adf_accel_pci *accel_pci_dev;
        struct adf_hw_device_data *hw_data;
        struct device *dev = &pdev->dev;
        struct adf_accel_dev *accel_dev;
        struct adf_bar *bar;
        unsigned int i;
        int ret;

        if (num_possible_nodes() > 1 && dev_to_node(dev) < 0) {
                /*
                 * If the accelerator is connected to a node with no memory
                 * there is no point in using the accelerator since the remote
                 * memory transaction will be very slow.
                 */
                return dev_err_probe(dev, -EINVAL, "Invalid NUMA configuration.\n");
        }

        accel_dev = devm_kzalloc(dev, sizeof(*accel_dev), GFP_KERNEL);
        if (!accel_dev)
                return -ENOMEM;

        INIT_LIST_HEAD(&accel_dev->crypto_list);
        INIT_LIST_HEAD(&accel_dev->list);
        accel_pci_dev = &accel_dev->accel_pci_dev;
        accel_pci_dev->pci_dev = pdev;
        accel_dev->owner = THIS_MODULE;

        hw_data = devm_kzalloc(dev, sizeof(*hw_data), GFP_KERNEL);
        if (!hw_data)
                return -ENOMEM;

        pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
        pci_read_config_dword(pdev, ADF_GEN6_FUSECTL4_OFFSET, &hw_data->fuses[ADF_FUSECTL4]);
        pci_read_config_dword(pdev, ADF_GEN6_FUSECTL0_OFFSET, &hw_data->fuses[ADF_FUSECTL0]);
        pci_read_config_dword(pdev, ADF_GEN6_FUSECTL1_OFFSET, &hw_data->fuses[ADF_FUSECTL1]);

        if (!(hw_data->fuses[ADF_FUSECTL1] & ICP_ACCEL_GEN6_MASK_WCP_WAT_SLICE))
                return dev_err_probe(dev, -EFAULT, "Wireless mode is not supported.\n");

        /* Enable PCI device */
        ret = pcim_enable_device(pdev);
        if (ret)
                return dev_err_probe(dev, ret, "Cannot enable PCI device.\n");

        ret = adf_devmgr_add_dev(accel_dev, NULL);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to add new accelerator device.\n");

        ret = devm_add_action_or_reset(dev, adf_devmgr_remove, accel_dev);
        if (ret)
                return ret;

        accel_dev->hw_device = hw_data;
        adf_init_hw_data_6xxx(accel_dev->hw_device);

        ret = devm_add_action_or_reset(dev, adf_cleanup_hw_data, accel_dev);
        if (ret)
                return ret;

        /* Get Accelerators and Accelerator Engine masks */
        hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
        hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
        accel_pci_dev->sku = hw_data->get_sku(hw_data);

        /* If the device has no acceleration engines then ignore it */
        if (!hw_data->accel_mask || !hw_data->ae_mask ||
            (~hw_data->ae_mask & ADF_GEN6_ACCELERATORS_MASK)) {
                ret = -EFAULT;
                return dev_err_probe(dev, ret, "No acceleration units were found.\n");
        }

        /* Create device configuration table */
        ret = adf_cfg_dev_add(accel_dev);
        if (ret)
                return ret;

        ret = devm_add_action_or_reset(dev, adf_cfg_device_remove, accel_dev);
        if (ret)
                return ret;

        /* Set DMA identifier */
        ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
        if (ret)
                return dev_err_probe(dev, ret, "No usable DMA configuration.\n");

        ret = adf_gen6_cfg_dev_init(accel_dev);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to initialize configuration.\n");

        /* Get accelerator capability mask */
        hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
        if (!hw_data->accel_capabilities_mask) {
                ret = -EINVAL;
                return dev_err_probe(dev, ret, "Failed to get capabilities mask.\n");
        }

        for (i = 0; i < ARRAY_SIZE(bar_map); i++) {
                bar = &accel_pci_dev->pci_bars[i];

                /* Map 64-bit PCIe BAR */
                bar->virt_addr = pcim_iomap_region(pdev, bar_map[i], pci_name(pdev));
                if (IS_ERR(bar->virt_addr)) {
                        ret = PTR_ERR(bar->virt_addr);
                        return dev_err_probe(dev, ret, "Failed to ioremap PCI region.\n");
                }
        }

        pci_set_master(pdev);

        /*
         * The PCI config space is saved at this point and will be restored
         * after a Function Level Reset (FLR) as the FLR does not completely
         * restore it.
         */
        ret = pci_save_state(pdev);
        if (ret)
                return dev_err_probe(dev, ret, "Failed to save pci state.\n");

        accel_dev->ras_errors.enabled = true;

        adf_dbgfs_init(accel_dev);

        ret = devm_add_action_or_reset(dev, adf_dbgfs_cleanup, accel_dev);
        if (ret)
                return ret;

        ret = adf_dev_up(accel_dev, true);
        if (ret)
                return ret;

        ret = devm_add_action_or_reset(dev, adf_device_down, accel_dev);
        if (ret)
                return ret;

        ret = adf_sysfs_init(accel_dev);

        return ret;
}

static void adf_shutdown(struct pci_dev *pdev)
{
        struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);

        adf_dev_down(accel_dev);
}

static const struct pci_device_id adf_pci_tbl[] = {
        { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_6XXX) },
        { }
};
MODULE_DEVICE_TABLE(pci, adf_pci_tbl);

static struct pci_driver adf_driver = {
        .id_table = adf_pci_tbl,
        .name = ADF_6XXX_DEVICE_NAME,
        .probe = adf_probe,
        .shutdown = adf_shutdown,
        .sriov_configure = adf_sriov_configure,
        .err_handler = &adf_err_handler,
};
module_pci_driver(adf_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Intel");
MODULE_FIRMWARE(ADF_6XXX_FW);
MODULE_FIRMWARE(ADF_6XXX_MMP);
MODULE_DESCRIPTION("Intel(R) QuickAssist Technology for GEN6 Devices");
MODULE_SOFTDEP("pre: crypto-intel_qat");
MODULE_IMPORT_NS("CRYPTO_QAT");