drivers/crypto/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_c62xvf_hw_data.h"
  20
  21 static const struct pci_device_id adf_pci_tbl[] = {
  22         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C62X_VF), },
  23         { }
  24 };
  25 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
  26
  27 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
  28 static void adf_remove(struct pci_dev *dev);
  29
  30 static struct pci_driver adf_driver = {
  31         .id_table = adf_pci_tbl,
  32         .name = ADF_C62XVF_DEVICE_NAME,
  33         .probe = adf_probe,
  34         .remove = adf_remove,
  35 };
  36
  37 static 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
  43 static 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_C62X_VF:
  59                         adf_clean_hw_data_c62xiov(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
  73 static 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_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 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         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 145                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 146                         dev_err(&pdev->dev, "No usable DMA configuration\n");
 147                         ret = -EFAULT;
 148                         goto out_err_disable;
 149                 } else {
 150                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 151                 }
 152
 153         } else {
 154                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 155         }
 156
 157         if (pci_request_regions(pdev, ADF_C62XVF_DEVICE_NAME)) {
 158                 ret = -EFAULT;
 159                 goto out_err_disable;
 160         }
 161
 162         /* Find and map all the device's BARS */
 163         i = 0;
 164         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 165         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 166                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 167
 168                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 169                 if (!bar->base_addr)
 170                         break;
 171                 bar->size = pci_resource_len(pdev, bar_nr);
 172                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 173                 if (!bar->virt_addr) {
 174                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 175                         ret = -EFAULT;
 176                         goto out_err_free_reg;
 177                 }
 178         }
 179         pci_set_master(pdev);
 180         /* Completion for VF2PF request/response message exchange */
 181         init_completion(&accel_dev->vf.iov_msg_completion);
 182
 183         ret = qat_crypto_dev_config(accel_dev);
 184         if (ret)
 185                 goto out_err_free_reg;
 186
 187         set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
 188
 189         ret = adf_dev_init(accel_dev);
 190         if (ret)
 191                 goto out_err_dev_shutdown;
 192
 193         ret = adf_dev_start(accel_dev);
 194         if (ret)
 195                 goto out_err_dev_stop;
 196
 197         return ret;
 198
 199 out_err_dev_stop:
 200         adf_dev_stop(accel_dev);
 201 out_err_dev_shutdown:
 202         adf_dev_shutdown(accel_dev);
 203 out_err_free_reg:
 204         pci_release_regions(accel_pci_dev->pci_dev);
 205 out_err_disable:
 206         pci_disable_device(accel_pci_dev->pci_dev);
 207 out_err:
 208         adf_cleanup_accel(accel_dev);
 209         kfree(accel_dev);
 210         return ret;
 211 }
 212
 213 static void adf_remove(struct pci_dev *pdev)
 214 {
 215         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 216
 217         if (!accel_dev) {
 218                 pr_err("QAT: Driver removal failed\n");
 219                 return;
 220         }
 221         adf_dev_stop(accel_dev);
 222         adf_dev_shutdown(accel_dev);
 223         adf_cleanup_accel(accel_dev);
 224         adf_cleanup_pci_dev(accel_dev);
 225         kfree(accel_dev);
 226 }
 227
 228 static int __init adfdrv_init(void)
 229 {
 230         request_module("intel_qat");
 231
 232         if (pci_register_driver(&adf_driver)) {
 233                 pr_err("QAT: Driver initialization failed\n");
 234                 return -EFAULT;
 235         }
 236         return 0;
 237 }
 238
 239 static void __exit adfdrv_release(void)
 240 {
 241         pci_unregister_driver(&adf_driver);
 242         adf_clean_vf_map(true);
 243 }
 244
 245 module_init(adfdrv_init);
 246 module_exit(adfdrv_release);
 247
 248 MODULE_LICENSE("Dual BSD/GPL");
 249 MODULE_AUTHOR("Intel");
 250 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 251 MODULE_VERSION(ADF_DRV_VERSION);