drivers/crypto/qat/qat_c3xxx/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_c3xxx_hw_data.h"
  20
  21 #define ADF_SYSTEM_DEVICE(device_id) \
  22         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  23
  24 static const struct pci_device_id adf_pci_tbl[] = {
  25         ADF_SYSTEM_DEVICE(ADF_C3XXX_PCI_DEVICE_ID),
  26         {0,}
  27 };
  28 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
  29
  30 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
  31 static void adf_remove(struct pci_dev *dev);
  32
  33 static struct pci_driver adf_driver = {
  34         .id_table = adf_pci_tbl,
  35         .name = ADF_C3XXX_DEVICE_NAME,
  36         .probe = adf_probe,
  37         .remove = adf_remove,
  38         .sriov_configure = adf_sriov_configure,
  39 };
  40
  41 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
  42 {
  43         pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
  44         pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
  45 }
  46
  47 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
  48 {
  49         struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
  50         int i;
  51
  52         for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
  53                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
  54
  55                 if (bar->virt_addr)
  56                         pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
  57         }
  58
  59         if (accel_dev->hw_device) {
  60                 switch (accel_pci_dev->pci_dev->device) {
  61                 case ADF_C3XXX_PCI_DEVICE_ID:
  62                         adf_clean_hw_data_c3xxx(accel_dev->hw_device);
  63                         break;
  64                 default:
  65                         break;
  66                 }
  67                 kfree(accel_dev->hw_device);
  68                 accel_dev->hw_device = NULL;
  69         }
  70         adf_cfg_dev_remove(accel_dev);
  71         debugfs_remove(accel_dev->debugfs_dir);
  72         adf_devmgr_rm_dev(accel_dev, NULL);
  73 }
  74
  75 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  76 {
  77         struct adf_accel_dev *accel_dev;
  78         struct adf_accel_pci *accel_pci_dev;
  79         struct adf_hw_device_data *hw_data;
  80         char name[ADF_DEVICE_NAME_LENGTH];
  81         unsigned int i, bar_nr;
  82         unsigned long bar_mask;
  83         int ret;
  84
  85         switch (ent->device) {
  86         case ADF_C3XXX_PCI_DEVICE_ID:
  87                 break;
  88         default:
  89                 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
  90                 return -ENODEV;
  91         }
  92
  93         if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
  94                 /* If the accelerator is connected to a node with no memory
  95                  * there is no point in using the accelerator since the remote
  96                  * memory transaction will be very slow. */
  97                 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
  98                 return -EINVAL;
  99         }
 100
 101         accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
 102                                  dev_to_node(&pdev->dev));
 103         if (!accel_dev)
 104                 return -ENOMEM;
 105
 106         INIT_LIST_HEAD(&accel_dev->crypto_list);
 107         accel_pci_dev = &accel_dev->accel_pci_dev;
 108         accel_pci_dev->pci_dev = pdev;
 109
 110         /* Add accel device to accel table.
 111          * This should be called before adf_cleanup_accel is called */
 112         if (adf_devmgr_add_dev(accel_dev, NULL)) {
 113                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 114                 kfree(accel_dev);
 115                 return -EFAULT;
 116         }
 117
 118         accel_dev->owner = THIS_MODULE;
 119         /* Allocate and configure device configuration structure */
 120         hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 121                                dev_to_node(&pdev->dev));
 122         if (!hw_data) {
 123                 ret = -ENOMEM;
 124                 goto out_err;
 125         }
 126
 127         accel_dev->hw_device = hw_data;
 128         adf_init_hw_data_c3xxx(accel_dev->hw_device);
 129         pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 130         pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
 131                               &hw_data->fuses);
 132
 133         /* Get Accelerators and Accelerators Engines masks */
 134         hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
 135         hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
 136         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 137         /* If the device has no acceleration engines then ignore it. */
 138         if (!hw_data->accel_mask || !hw_data->ae_mask ||
 139             ((~hw_data->ae_mask) & 0x01)) {
 140                 dev_err(&pdev->dev, "No acceleration units found");
 141                 ret = -EFAULT;
 142                 goto out_err;
 143         }
 144
 145         /* Create dev top level debugfs entry */
 146         snprintf(name, sizeof(name), "%s%s_%02x:%02d.%d",
 147                  ADF_DEVICE_NAME_PREFIX, hw_data->dev_class->name,
 148                  pdev->bus->number, PCI_SLOT(pdev->devfn),
 149                  PCI_FUNC(pdev->devfn));
 150
 151         accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 152
 153         /* Create device configuration table */
 154         ret = adf_cfg_dev_add(accel_dev);
 155         if (ret)
 156                 goto out_err;
 157
 158         /* enable PCI device */
 159         if (pci_enable_device(pdev)) {
 160                 ret = -EFAULT;
 161                 goto out_err;
 162         }
 163
 164         /* set dma identifier */
 165         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 166                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 167                         dev_err(&pdev->dev, "No usable DMA configuration\n");
 168                         ret = -EFAULT;
 169                         goto out_err_disable;
 170                 } else {
 171                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 172                 }
 173
 174         } else {
 175                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 176         }
 177
 178         if (pci_request_regions(pdev, ADF_C3XXX_DEVICE_NAME)) {
 179                 ret = -EFAULT;
 180                 goto out_err_disable;
 181         }
 182
 183         /* Read accelerator capabilities mask */
 184         pci_read_config_dword(pdev, ADF_DEVICE_LEGFUSE_OFFSET,
 185                               &hw_data->accel_capabilities_mask);
 186
 187         /* Find and map all the device's BARS */
 188         i = 0;
 189         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 190         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 191                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 192
 193                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 194                 if (!bar->base_addr)
 195                         break;
 196                 bar->size = pci_resource_len(pdev, bar_nr);
 197                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 198                 if (!bar->virt_addr) {
 199                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 200                         ret = -EFAULT;
 201                         goto out_err_free_reg;
 202                 }
 203         }
 204         pci_set_master(pdev);
 205
 206         if (adf_enable_aer(accel_dev, &adf_driver)) {
 207                 dev_err(&pdev->dev, "Failed to enable aer\n");
 208                 ret = -EFAULT;
 209                 goto out_err_free_reg;
 210         }
 211
 212         if (pci_save_state(pdev)) {
 213                 dev_err(&pdev->dev, "Failed to save pci state\n");
 214                 ret = -ENOMEM;
 215                 goto out_err_free_reg;
 216         }
 217
 218         ret = qat_crypto_dev_config(accel_dev);
 219         if (ret)
 220                 goto out_err_free_reg;
 221
 222         ret = adf_dev_init(accel_dev);
 223         if (ret)
 224                 goto out_err_dev_shutdown;
 225
 226         ret = adf_dev_start(accel_dev);
 227         if (ret)
 228                 goto out_err_dev_stop;
 229
 230         return ret;
 231
 232 out_err_dev_stop:
 233         adf_dev_stop(accel_dev);
 234 out_err_dev_shutdown:
 235         adf_dev_shutdown(accel_dev);
 236 out_err_free_reg:
 237         pci_release_regions(accel_pci_dev->pci_dev);
 238 out_err_disable:
 239         pci_disable_device(accel_pci_dev->pci_dev);
 240 out_err:
 241         adf_cleanup_accel(accel_dev);
 242         kfree(accel_dev);
 243         return ret;
 244 }
 245
 246 static void adf_remove(struct pci_dev *pdev)
 247 {
 248         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 249
 250         if (!accel_dev) {
 251                 pr_err("QAT: Driver removal failed\n");
 252                 return;
 253         }
 254         adf_dev_stop(accel_dev);
 255         adf_dev_shutdown(accel_dev);
 256         adf_disable_aer(accel_dev);
 257         adf_cleanup_accel(accel_dev);
 258         adf_cleanup_pci_dev(accel_dev);
 259         kfree(accel_dev);
 260 }
 261
 262 static int __init adfdrv_init(void)
 263 {
 264         request_module("intel_qat");
 265
 266         if (pci_register_driver(&adf_driver)) {
 267                 pr_err("QAT: Driver initialization failed\n");
 268                 return -EFAULT;
 269         }
 270         return 0;
 271 }
 272
 273 static void __exit adfdrv_release(void)
 274 {
 275         pci_unregister_driver(&adf_driver);
 276 }
 277
 278 module_init(adfdrv_init);
 279 module_exit(adfdrv_release);
 280
 281 MODULE_LICENSE("Dual BSD/GPL");
 282 MODULE_AUTHOR("Intel");
 283 MODULE_FIRMWARE(ADF_C3XXX_FW);
 284 MODULE_FIRMWARE(ADF_C3XXX_MMP);
 285 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 286 MODULE_VERSION(ADF_DRV_VERSION);