drivers/crypto/intel/qat/qat_c62xvf/adf_drv.c

   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_dbgfs.h>
  20 #include "adf_c62xvf_hw_data.h"
  21
  22 static const struct pci_device_id adf_pci_tbl[] = {
  23         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C62X_VF), },
  24         { }
  25 };
  26 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
  27
  28 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
  29 static void adf_remove(struct pci_dev *dev);
  30
  31 static struct pci_driver adf_driver = {
  32         .id_table = adf_pci_tbl,
  33         .name = ADF_C62XVF_DEVICE_NAME,
  34         .probe = adf_probe,
  35         .remove = adf_remove,
  36 };
  37
  38 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
  39 {
  40         pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
  41         pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
  42 }
  43
  44 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
  45 {
  46         struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
  47         struct adf_accel_dev *pf;
  48         int i;
  49
  50         for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
  51                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
  52
  53                 if (bar->virt_addr)
  54                         pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
  55         }
  56
  57         if (accel_dev->hw_device) {
  58                 switch (accel_pci_dev->pci_dev->device) {
  59                 case PCI_DEVICE_ID_INTEL_QAT_C62X_VF:
  60                         adf_clean_hw_data_c62xiov(accel_dev->hw_device);
  61                         break;
  62                 default:
  63                         break;
  64                 }
  65                 kfree(accel_dev->hw_device);
  66                 accel_dev->hw_device = NULL;
  67         }
  68         adf_dbgfs_exit(accel_dev);
  69         adf_cfg_dev_remove(accel_dev);
  70         pf = adf_devmgr_pci_to_accel_dev(accel_pci_dev->pci_dev->physfn);
  71         adf_devmgr_rm_dev(accel_dev, pf);
  72 }
  73
  74 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  75 {
  76         struct adf_accel_dev *accel_dev;
  77         struct adf_accel_dev *pf;
  78         struct adf_accel_pci *accel_pci_dev;
  79         struct adf_hw_device_data *hw_data;
  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_C62X_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_c62xiov(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 device configuration table */
 127         ret = adf_cfg_dev_add(accel_dev);
 128         if (ret)
 129                 goto out_err;
 130
 131         /* enable PCI device */
 132         if (pci_enable_device(pdev)) {
 133                 ret = -EFAULT;
 134                 goto out_err;
 135         }
 136
 137         /* set dma identifier */
 138         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
 139         if (ret) {
 140                 dev_err(&pdev->dev, "No usable DMA configuration\n");
 141                 goto out_err_disable;
 142         }
 143
 144         if (pci_request_regions(pdev, ADF_C62XVF_DEVICE_NAME)) {
 145                 ret = -EFAULT;
 146                 goto out_err_disable;
 147         }
 148
 149         /* Find and map all the device's BARS */
 150         i = 0;
 151         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 152         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 153                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 154
 155                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 156                 if (!bar->base_addr)
 157                         break;
 158                 bar->size = pci_resource_len(pdev, bar_nr);
 159                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 160                 if (!bar->virt_addr) {
 161                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 162                         ret = -EFAULT;
 163                         goto out_err_free_reg;
 164                 }
 165         }
 166         pci_set_master(pdev);
 167         /* Completion for VF2PF request/response message exchange */
 168         init_completion(&accel_dev->vf.msg_received);
 169
 170         adf_dbgfs_init(accel_dev);
 171
 172         ret = adf_dev_up(accel_dev, false);
 173         if (ret)
 174                 goto out_err_dev_stop;
 175
 176         return ret;
 177
 178 out_err_dev_stop:
 179         adf_dev_down(accel_dev);
 180 out_err_free_reg:
 181         pci_release_regions(accel_pci_dev->pci_dev);
 182 out_err_disable:
 183         pci_disable_device(accel_pci_dev->pci_dev);
 184 out_err:
 185         adf_cleanup_accel(accel_dev);
 186         kfree(accel_dev);
 187         return ret;
 188 }
 189
 190 static void adf_remove(struct pci_dev *pdev)
 191 {
 192         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 193
 194         if (!accel_dev) {
 195                 pr_err("QAT: Driver removal failed\n");
 196                 return;
 197         }
 198         adf_flush_vf_wq(accel_dev);
 199         adf_dev_down(accel_dev);
 200         adf_cleanup_accel(accel_dev);
 201         adf_cleanup_pci_dev(accel_dev);
 202         kfree(accel_dev);
 203 }
 204
 205 static int __init adfdrv_init(void)
 206 {
 207         request_module("intel_qat");
 208
 209         if (pci_register_driver(&adf_driver)) {
 210                 pr_err("QAT: Driver initialization failed\n");
 211                 return -EFAULT;
 212         }
 213         return 0;
 214 }
 215
 216 static void __exit adfdrv_release(void)
 217 {
 218         pci_unregister_driver(&adf_driver);
 219         adf_clean_vf_map(true);
 220 }
 221
 222 module_init(adfdrv_init);
 223 module_exit(adfdrv_release);
 224
 225 MODULE_LICENSE("Dual BSD/GPL");
 226 MODULE_AUTHOR("Intel");
 227 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 228 MODULE_VERSION(ADF_DRV_VERSION);
 229 MODULE_IMPORT_NS("CRYPTO_QAT");