drivers/crypto/qat/qat_4xxx/adf_drv.c

   1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
   2 /* Copyright(c) 2020 Intel Corporation */
   3 #include <linux/device.h>
   4 #include <linux/module.h>
   5 #include <linux/pci.h>
   6
   7 #include <adf_accel_devices.h>
   8 #include <adf_cfg.h>
   9 #include <adf_common_drv.h>
  10
  11 #include "adf_4xxx_hw_data.h"
  12 #include "qat_crypto.h"
  13 #include "adf_transport_access_macros.h"
  14
  15 static const struct pci_device_id adf_pci_tbl[] = {
  16         { PCI_VDEVICE(INTEL, ADF_4XXX_PCI_DEVICE_ID), },
  17         { }
  18 };
  19 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
  20
  21 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
  22 {
  23         if (accel_dev->hw_device) {
  24                 adf_clean_hw_data_4xxx(accel_dev->hw_device);
  25                 accel_dev->hw_device = NULL;
  26         }
  27         adf_cfg_dev_remove(accel_dev);
  28         debugfs_remove(accel_dev->debugfs_dir);
  29         adf_devmgr_rm_dev(accel_dev, NULL);
  30 }
  31
  32 static int adf_crypto_dev_config(struct adf_accel_dev *accel_dev)
  33 {
  34         char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
  35         int banks = GET_MAX_BANKS(accel_dev);
  36         int cpus = num_online_cpus();
  37         unsigned long bank, val;
  38         int instances;
  39         int ret;
  40         int i;
  41
  42         if (adf_hw_dev_has_crypto(accel_dev))
  43                 instances = min(cpus, banks / 2);
  44         else
  45                 instances = 0;
  46
  47         ret = adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC);
  48         if (ret)
  49                 goto err;
  50
  51         ret = adf_cfg_section_add(accel_dev, "Accelerator0");
  52         if (ret)
  53                 goto err;
  54
  55         for (i = 0; i < instances; i++) {
  56                 val = i;
  57                 bank = i * 2;
  58                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_BANK_NUM, i);
  59                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
  60                                                   key, &bank, ADF_DEC);
  61                 if (ret)
  62                         goto err;
  63
  64                 bank += 1;
  65                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_BANK_NUM, i);
  66                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
  67                                                   key, &bank, ADF_DEC);
  68                 if (ret)
  69                         goto err;
  70
  71                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_ETRMGR_CORE_AFFINITY,
  72                          i);
  73                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
  74                                                   key, &val, ADF_DEC);
  75                 if (ret)
  76                         goto err;
  77
  78                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_SIZE, i);
  79                 val = 128;
  80                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
  81                                                   key, &val, ADF_DEC);
  82                 if (ret)
  83                         goto err;
  84
  85                 val = 512;
  86                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_SIZE, i);
  87                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
  88                                                   key, &val, ADF_DEC);
  89                 if (ret)
  90                         goto err;
  91
  92                 val = 0;
  93                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_TX, i);
  94                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
  95                                                   key, &val, ADF_DEC);
  96                 if (ret)
  97                         goto err;
  98
  99                 val = 0;
 100                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_TX, i);
 101                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 102                                                   key, &val, ADF_DEC);
 103                 if (ret)
 104                         goto err;
 105
 106                 val = 1;
 107                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_RX, i);
 108                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 109                                                   key, &val, ADF_DEC);
 110                 if (ret)
 111                         goto err;
 112
 113                 val = 1;
 114                 snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_SYM_RX, i);
 115                 ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
 116                                                   key, &val, ADF_DEC);
 117                 if (ret)
 118                         goto err;
 119
 120                 val = ADF_COALESCING_DEF_TIME;
 121                 snprintf(key, sizeof(key), ADF_ETRMGR_COALESCE_TIMER_FORMAT, i);
 122                 ret = adf_cfg_add_key_value_param(accel_dev, "Accelerator0",
 123                                                   key, &val, ADF_DEC);
 124                 if (ret)
 125                         goto err;
 126         }
 127
 128         val = i;
 129         ret = adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC, ADF_NUM_CY,
 130                                           &val, ADF_DEC);
 131         if (ret)
 132                 goto err;
 133
 134         set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
 135         return 0;
 136 err:
 137         dev_err(&GET_DEV(accel_dev), "Failed to start QAT accel dev\n");
 138         return ret;
 139 }
 140
 141 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 142 {
 143         struct adf_accel_dev *accel_dev;
 144         struct adf_accel_pci *accel_pci_dev;
 145         struct adf_hw_device_data *hw_data;
 146         char name[ADF_DEVICE_NAME_LENGTH];
 147         unsigned int i, bar_nr;
 148         unsigned long bar_mask;
 149         struct adf_bar *bar;
 150         int ret;
 151
 152         if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
 153                 /*
 154                  * If the accelerator is connected to a node with no memory
 155                  * there is no point in using the accelerator since the remote
 156                  * memory transaction will be very slow.
 157                  */
 158                 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
 159                 return -EINVAL;
 160         }
 161
 162         accel_dev = devm_kzalloc(&pdev->dev, sizeof(*accel_dev), GFP_KERNEL);
 163         if (!accel_dev)
 164                 return -ENOMEM;
 165
 166         INIT_LIST_HEAD(&accel_dev->crypto_list);
 167         accel_pci_dev = &accel_dev->accel_pci_dev;
 168         accel_pci_dev->pci_dev = pdev;
 169
 170         /*
 171          * Add accel device to accel table
 172          * This should be called before adf_cleanup_accel is called
 173          */
 174         if (adf_devmgr_add_dev(accel_dev, NULL)) {
 175                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 176                 return -EFAULT;
 177         }
 178
 179         accel_dev->owner = THIS_MODULE;
 180         /* Allocate and initialise device hardware meta-data structure */
 181         hw_data = devm_kzalloc(&pdev->dev, sizeof(*hw_data), GFP_KERNEL);
 182         if (!hw_data) {
 183                 ret = -ENOMEM;
 184                 goto out_err;
 185         }
 186
 187         accel_dev->hw_device = hw_data;
 188         adf_init_hw_data_4xxx(accel_dev->hw_device);
 189
 190         pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 191         pci_read_config_dword(pdev, ADF_4XXX_FUSECTL4_OFFSET, &hw_data->fuses);
 192
 193         /* Get Accelerators and Accelerators Engines masks */
 194         hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
 195         hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
 196         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 197         /* If the device has no acceleration engines then ignore it */
 198         if (!hw_data->accel_mask || !hw_data->ae_mask ||
 199             (~hw_data->ae_mask & 0x01)) {
 200                 dev_err(&pdev->dev, "No acceleration units found.\n");
 201                 ret = -EFAULT;
 202                 goto out_err;
 203         }
 204
 205         /* Create dev top level debugfs entry */
 206         snprintf(name, sizeof(name), "%s%s_%s", ADF_DEVICE_NAME_PREFIX,
 207                  hw_data->dev_class->name, pci_name(pdev));
 208
 209         accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 210
 211         /* Create device configuration table */
 212         ret = adf_cfg_dev_add(accel_dev);
 213         if (ret)
 214                 goto out_err;
 215
 216         /* Enable PCI device */
 217         ret = pcim_enable_device(pdev);
 218         if (ret) {
 219                 dev_err(&pdev->dev, "Can't enable PCI device.\n");
 220                 goto out_err;
 221         }
 222
 223         /* Set DMA identifier */
 224         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 225                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 226                         dev_err(&pdev->dev, "No usable DMA configuration.\n");
 227                         ret = -EFAULT;
 228                         goto out_err;
 229                 } else {
 230                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 231                 }
 232         } else {
 233                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 234         }
 235
 236         /* Get accelerator capabilities mask */
 237         hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
 238
 239         /* Find and map all the device's BARS */
 240         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM) & ADF_4XXX_BAR_MASK;
 241
 242         ret = pcim_iomap_regions_request_all(pdev, bar_mask, pci_name(pdev));
 243         if (ret) {
 244                 dev_err(&pdev->dev, "Failed to map pci regions.\n");
 245                 goto out_err;
 246         }
 247
 248         i = 0;
 249         for_each_set_bit(bar_nr, &bar_mask, PCI_STD_NUM_BARS) {
 250                 bar = &accel_pci_dev->pci_bars[i++];
 251                 bar->virt_addr = pcim_iomap_table(pdev)[bar_nr];
 252         }
 253
 254         pci_set_master(pdev);
 255
 256         if (adf_enable_aer(accel_dev)) {
 257                 dev_err(&pdev->dev, "Failed to enable aer.\n");
 258                 ret = -EFAULT;
 259                 goto out_err;
 260         }
 261
 262         if (pci_save_state(pdev)) {
 263                 dev_err(&pdev->dev, "Failed to save pci state.\n");
 264                 ret = -ENOMEM;
 265                 goto out_err_disable_aer;
 266         }
 267
 268         ret = adf_crypto_dev_config(accel_dev);
 269         if (ret)
 270                 goto out_err_disable_aer;
 271
 272         ret = adf_dev_init(accel_dev);
 273         if (ret)
 274                 goto out_err_dev_shutdown;
 275
 276         ret = adf_dev_start(accel_dev);
 277         if (ret)
 278                 goto out_err_dev_stop;
 279
 280         return ret;
 281
 282 out_err_dev_stop:
 283         adf_dev_stop(accel_dev);
 284 out_err_dev_shutdown:
 285         adf_dev_shutdown(accel_dev);
 286 out_err_disable_aer:
 287         adf_disable_aer(accel_dev);
 288 out_err:
 289         adf_cleanup_accel(accel_dev);
 290         return ret;
 291 }
 292
 293 static void adf_remove(struct pci_dev *pdev)
 294 {
 295         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 296
 297         if (!accel_dev) {
 298                 pr_err("QAT: Driver removal failed\n");
 299                 return;
 300         }
 301         adf_dev_stop(accel_dev);
 302         adf_dev_shutdown(accel_dev);
 303         adf_disable_aer(accel_dev);
 304         adf_cleanup_accel(accel_dev);
 305 }
 306
 307 static struct pci_driver adf_driver = {
 308         .id_table = adf_pci_tbl,
 309         .name = ADF_4XXX_DEVICE_NAME,
 310         .probe = adf_probe,
 311         .remove = adf_remove,
 312         .sriov_configure = adf_sriov_configure,
 313 };
 314
 315 module_pci_driver(adf_driver);
 316
 317 MODULE_LICENSE("Dual BSD/GPL");
 318 MODULE_AUTHOR("Intel");
 319 MODULE_FIRMWARE(ADF_4XXX_FW);
 320 MODULE_FIRMWARE(ADF_4XXX_MMP);
 321 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 322 MODULE_VERSION(ADF_DRV_VERSION);
 323 MODULE_SOFTDEP("pre: crypto-intel_qat");