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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adf_drv.c (6233B)

      1// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
      2/* Copyright(c) 2014 - 2020 Intel Corporation */
      3#include <linux/kernel.h>
      4#include <linux/module.h>
      5#include <linux/pci.h>
      6#include <linux/init.h>
      7#include <linux/types.h>
      8#include <linux/fs.h>
      9#include <linux/slab.h>
     10#include <linux/errno.h>
     11#include <linux/device.h>
     12#include <linux/dma-mapping.h>
     13#include <linux/platform_device.h>
     14#include <linux/workqueue.h>
     15#include <linux/io.h>
     16#include <adf_accel_devices.h>
     17#include <adf_common_drv.h>
     18#include <adf_cfg.h>
     19#include "adf_c3xxxvf_hw_data.h"
     20
     21static const struct pci_device_id adf_pci_tbl[] = {
     22	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C3XXX_VF), },
     23	{ }
     24};
     25MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
     26
     27static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
     28static void adf_remove(struct pci_dev *dev);
     29
     30static struct pci_driver adf_driver = {
     31	.id_table = adf_pci_tbl,
     32	.name = ADF_C3XXXVF_DEVICE_NAME,
     33	.probe = adf_probe,
     34	.remove = adf_remove,
     35};
     36
     37static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
     38{
     39	pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
     40	pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
     41}
     42
     43static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
     44{
     45	struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
     46	struct adf_accel_dev *pf;
     47	int i;
     48
     49	for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
     50		struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
     51
     52		if (bar->virt_addr)
     53			pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
     54	}
     55
     56	if (accel_dev->hw_device) {
     57		switch (accel_pci_dev->pci_dev->device) {
     58		case PCI_DEVICE_ID_INTEL_QAT_C3XXX_VF:
     59			adf_clean_hw_data_c3xxxiov(accel_dev->hw_device);
     60			break;
     61		default:
     62			break;
     63		}
     64		kfree(accel_dev->hw_device);
     65		accel_dev->hw_device = NULL;
     66	}
     67	adf_cfg_dev_remove(accel_dev);
     68	debugfs_remove(accel_dev->debugfs_dir);
     69	pf = adf_devmgr_pci_to_accel_dev(accel_pci_dev->pci_dev->physfn);
     70	adf_devmgr_rm_dev(accel_dev, pf);
     71}
     72
     73static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
     74{
     75	struct adf_accel_dev *accel_dev;
     76	struct adf_accel_dev *pf;
     77	struct adf_accel_pci *accel_pci_dev;
     78	struct adf_hw_device_data *hw_data;
     79	char name[ADF_DEVICE_NAME_LENGTH];
     80	unsigned int i, bar_nr;
     81	unsigned long bar_mask;
     82	int ret;
     83
     84	switch (ent->device) {
     85	case PCI_DEVICE_ID_INTEL_QAT_C3XXX_VF:
     86		break;
     87	default:
     88		dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
     89		return -ENODEV;
     90	}
     91
     92	accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
     93				 dev_to_node(&pdev->dev));
     94	if (!accel_dev)
     95		return -ENOMEM;
     96
     97	accel_dev->is_vf = true;
     98	pf = adf_devmgr_pci_to_accel_dev(pdev->physfn);
     99	accel_pci_dev = &accel_dev->accel_pci_dev;
    100	accel_pci_dev->pci_dev = pdev;
    101
    102	/* Add accel device to accel table */
    103	if (adf_devmgr_add_dev(accel_dev, pf)) {
    104		dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
    105		kfree(accel_dev);
    106		return -EFAULT;
    107	}
    108	INIT_LIST_HEAD(&accel_dev->crypto_list);
    109
    110	accel_dev->owner = THIS_MODULE;
    111	/* Allocate and configure device configuration structure */
    112	hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
    113			       dev_to_node(&pdev->dev));
    114	if (!hw_data) {
    115		ret = -ENOMEM;
    116		goto out_err;
    117	}
    118	accel_dev->hw_device = hw_data;
    119	adf_init_hw_data_c3xxxiov(accel_dev->hw_device);
    120
    121	/* Get Accelerators and Accelerators Engines masks */
    122	hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
    123	hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
    124	accel_pci_dev->sku = hw_data->get_sku(hw_data);
    125
    126	/* Create dev top level debugfs entry */
    127	snprintf(name, sizeof(name), "%s%s_%s", ADF_DEVICE_NAME_PREFIX,
    128		 hw_data->dev_class->name, pci_name(pdev));
    129
    130	accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
    131
    132	/* Create device configuration table */
    133	ret = adf_cfg_dev_add(accel_dev);
    134	if (ret)
    135		goto out_err;
    136
    137	/* enable PCI device */
    138	if (pci_enable_device(pdev)) {
    139		ret = -EFAULT;
    140		goto out_err;
    141	}
    142
    143	/* set dma identifier */
    144	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
    145	if (ret) {
    146		dev_err(&pdev->dev, "No usable DMA configuration\n");
    147		goto out_err_disable;
    148	}
    149
    150	if (pci_request_regions(pdev, ADF_C3XXXVF_DEVICE_NAME)) {
    151		ret = -EFAULT;
    152		goto out_err_disable;
    153	}
    154
    155	/* Find and map all the device's BARS */
    156	i = 0;
    157	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
    158	for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
    159		struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
    160
    161		bar->base_addr = pci_resource_start(pdev, bar_nr);
    162		if (!bar->base_addr)
    163			break;
    164		bar->size = pci_resource_len(pdev, bar_nr);
    165		bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
    166		if (!bar->virt_addr) {
    167			dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
    168			ret = -EFAULT;
    169			goto out_err_free_reg;
    170		}
    171	}
    172	pci_set_master(pdev);
    173	/* Completion for VF2PF request/response message exchange */
    174	init_completion(&accel_dev->vf.msg_received);
    175
    176	ret = adf_dev_init(accel_dev);
    177	if (ret)
    178		goto out_err_dev_shutdown;
    179
    180	set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
    181
    182	ret = adf_dev_start(accel_dev);
    183	if (ret)
    184		goto out_err_dev_stop;
    185
    186	return ret;
    187
    188out_err_dev_stop:
    189	adf_dev_stop(accel_dev);
    190out_err_dev_shutdown:
    191	adf_dev_shutdown(accel_dev);
    192out_err_free_reg:
    193	pci_release_regions(accel_pci_dev->pci_dev);
    194out_err_disable:
    195	pci_disable_device(accel_pci_dev->pci_dev);
    196out_err:
    197	adf_cleanup_accel(accel_dev);
    198	kfree(accel_dev);
    199	return ret;
    200}
    201
    202static void adf_remove(struct pci_dev *pdev)
    203{
    204	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
    205
    206	if (!accel_dev) {
    207		pr_err("QAT: Driver removal failed\n");
    208		return;
    209	}
    210	adf_flush_vf_wq(accel_dev);
    211	adf_dev_stop(accel_dev);
    212	adf_dev_shutdown(accel_dev);
    213	adf_cleanup_accel(accel_dev);
    214	adf_cleanup_pci_dev(accel_dev);
    215	kfree(accel_dev);
    216}
    217
    218static int __init adfdrv_init(void)
    219{
    220	request_module("intel_qat");
    221
    222	if (pci_register_driver(&adf_driver)) {
    223		pr_err("QAT: Driver initialization failed\n");
    224		return -EFAULT;
    225	}
    226	return 0;
    227}
    228
    229static void __exit adfdrv_release(void)
    230{
    231	pci_unregister_driver(&adf_driver);
    232	adf_clean_vf_map(true);
    233}
    234
    235module_init(adfdrv_init);
    236module_exit(adfdrv_release);
    237
    238MODULE_LICENSE("Dual BSD/GPL");
    239MODULE_AUTHOR("Intel");
    240MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
    241MODULE_VERSION(ADF_DRV_VERSION);