drivers/crypto/qat/qat_c62x/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_c62x_hw_data.h"
  20
  21 static const struct pci_device_id adf_pci_tbl[] = {
  22         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C62X), },
  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_C62X_DEVICE_NAME,
  33         .probe = adf_probe,
  34         .remove = adf_remove,
  35         .sriov_configure = adf_sriov_configure,
  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         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:
  59                         adf_clean_hw_data_c62x(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         adf_devmgr_rm_dev(accel_dev, NULL);
  70 }
  71
  72 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  73 {
  74         struct adf_accel_dev *accel_dev;
  75         struct adf_accel_pci *accel_pci_dev;
  76         struct adf_hw_device_data *hw_data;
  77         char name[ADF_DEVICE_NAME_LENGTH];
  78         unsigned int i, bar_nr;
  79         unsigned long bar_mask;
  80         int ret;
  81
  82         switch (ent->device) {
  83         case PCI_DEVICE_ID_INTEL_QAT_C62X:
  84                 break;
  85         default:
  86                 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
  87                 return -ENODEV;
  88         }
  89
  90         if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
  91                 /* If the accelerator is connected to a node with no memory
  92                  * there is no point in using the accelerator since the remote
  93                  * memory transaction will be very slow. */
  94                 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
  95                 return -EINVAL;
  96         }
  97
  98         accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
  99                                  dev_to_node(&pdev->dev));
 100         if (!accel_dev)
 101                 return -ENOMEM;
 102
 103         INIT_LIST_HEAD(&accel_dev->crypto_list);
 104         accel_pci_dev = &accel_dev->accel_pci_dev;
 105         accel_pci_dev->pci_dev = pdev;
 106
 107         /* Add accel device to accel table.
 108          * This should be called before adf_cleanup_accel is called */
 109         if (adf_devmgr_add_dev(accel_dev, NULL)) {
 110                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 111                 kfree(accel_dev);
 112                 return -EFAULT;
 113         }
 114
 115         accel_dev->owner = THIS_MODULE;
 116         /* Allocate and configure device configuration structure */
 117         hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 118                                dev_to_node(&pdev->dev));
 119         if (!hw_data) {
 120                 ret = -ENOMEM;
 121                 goto out_err;
 122         }
 123
 124         accel_dev->hw_device = hw_data;
 125         adf_init_hw_data_c62x(accel_dev->hw_device);
 126         pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 127         pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
 128                               &hw_data->fuses);
 129         pci_read_config_dword(pdev, ADF_C62X_SOFTSTRAP_CSR_OFFSET,
 130                               &hw_data->straps);
 131
 132         /* Get Accelerators and Accelerators Engines masks */
 133         hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
 134         hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
 135         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 136         /* If the device has no acceleration engines then ignore it. */
 137         if (!hw_data->accel_mask || !hw_data->ae_mask ||
 138             ((~hw_data->ae_mask) & 0x01)) {
 139                 dev_err(&pdev->dev, "No acceleration units found");
 140                 ret = -EFAULT;
 141                 goto out_err;
 142         }
 143
 144         /* Create dev top level debugfs entry */
 145         snprintf(name, sizeof(name), "%s%s_%s", ADF_DEVICE_NAME_PREFIX,
 146                  hw_data->dev_class->name, pci_name(pdev));
 147
 148         accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 149
 150         /* Create device configuration table */
 151         ret = adf_cfg_dev_add(accel_dev);
 152         if (ret)
 153                 goto out_err;
 154
 155         /* enable PCI device */
 156         if (pci_enable_device(pdev)) {
 157                 ret = -EFAULT;
 158                 goto out_err;
 159         }
 160
 161         /* set dma identifier */
 162         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 163                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 164                         dev_err(&pdev->dev, "No usable DMA configuration\n");
 165                         ret = -EFAULT;
 166                         goto out_err_disable;
 167                 } else {
 168                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 169                 }
 170
 171         } else {
 172                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 173         }
 174
 175         if (pci_request_regions(pdev, ADF_C62X_DEVICE_NAME)) {
 176                 ret = -EFAULT;
 177                 goto out_err_disable;
 178         }
 179
 180         /* Get accelerator capabilities mask */
 181         hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
 182
 183         /* Find and map all the device's BARS */
 184         i = (hw_data->fuses & ADF_DEVICE_FUSECTL_MASK) ? 1 : 0;
 185         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 186         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 187                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 188
 189                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 190                 if (!bar->base_addr)
 191                         break;
 192                 bar->size = pci_resource_len(pdev, bar_nr);
 193                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 194                 if (!bar->virt_addr) {
 195                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 196                         ret = -EFAULT;
 197                         goto out_err_free_reg;
 198                 }
 199         }
 200         pci_set_master(pdev);
 201
 202         if (adf_enable_aer(accel_dev)) {
 203                 dev_err(&pdev->dev, "Failed to enable aer\n");
 204                 ret = -EFAULT;
 205                 goto out_err_free_reg;
 206         }
 207
 208         if (pci_save_state(pdev)) {
 209                 dev_err(&pdev->dev, "Failed to save pci state\n");
 210                 ret = -ENOMEM;
 211                 goto out_err_free_reg;
 212         }
 213
 214         ret = qat_crypto_dev_config(accel_dev);
 215         if (ret)
 216                 goto out_err_free_reg;
 217
 218         ret = adf_dev_init(accel_dev);
 219         if (ret)
 220                 goto out_err_dev_shutdown;
 221
 222         ret = adf_dev_start(accel_dev);
 223         if (ret)
 224                 goto out_err_dev_stop;
 225
 226         return ret;
 227
 228 out_err_dev_stop:
 229         adf_dev_stop(accel_dev);
 230 out_err_dev_shutdown:
 231         adf_dev_shutdown(accel_dev);
 232 out_err_free_reg:
 233         pci_release_regions(accel_pci_dev->pci_dev);
 234 out_err_disable:
 235         pci_disable_device(accel_pci_dev->pci_dev);
 236 out_err:
 237         adf_cleanup_accel(accel_dev);
 238         kfree(accel_dev);
 239         return ret;
 240 }
 241
 242 static void adf_remove(struct pci_dev *pdev)
 243 {
 244         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 245
 246         if (!accel_dev) {
 247                 pr_err("QAT: Driver removal failed\n");
 248                 return;
 249         }
 250         adf_dev_stop(accel_dev);
 251         adf_dev_shutdown(accel_dev);
 252         adf_disable_aer(accel_dev);
 253         adf_cleanup_accel(accel_dev);
 254         adf_cleanup_pci_dev(accel_dev);
 255         kfree(accel_dev);
 256 }
 257
 258 static int __init adfdrv_init(void)
 259 {
 260         request_module("intel_qat");
 261
 262         if (pci_register_driver(&adf_driver)) {
 263                 pr_err("QAT: Driver initialization failed\n");
 264                 return -EFAULT;
 265         }
 266         return 0;
 267 }
 268
 269 static void __exit adfdrv_release(void)
 270 {
 271         pci_unregister_driver(&adf_driver);
 272 }
 273
 274 module_init(adfdrv_init);
 275 module_exit(adfdrv_release);
 276
 277 MODULE_LICENSE("Dual BSD/GPL");
 278 MODULE_AUTHOR("Intel");
 279 MODULE_FIRMWARE(ADF_C62X_FW);
 280 MODULE_FIRMWARE(ADF_C62X_MMP);
 281 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 282 MODULE_VERSION(ADF_DRV_VERSION);