drivers/crypto/qat/qat_c3xxx/adf_drv.c

   1 /*
   2   This file is provided under a dual BSD/GPLv2 license.  When using or
   3   redistributing this file, you may do so under either license.
   4
   5   GPL LICENSE SUMMARY
   6   Copyright(c) 2014 Intel Corporation.
   7   This program is free software; you can redistribute it and/or modify
   8   it under the terms of version 2 of the GNU General Public License as
   9   published by the Free Software Foundation.
  10
  11   This program is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14   General Public License for more details.
  15
  16   Contact Information:
  17   qat-linux@intel.com
  18
  19   BSD LICENSE
  20   Copyright(c) 2014 Intel Corporation.
  21   Redistribution and use in source and binary forms, with or without
  22   modification, are permitted provided that the following conditions
  23   are met:
  24
  25     * Redistributions of source code must retain the above copyright
  26       notice, this list of conditions and the following disclaimer.
  27     * Redistributions in binary form must reproduce the above copyright
  28       notice, this list of conditions and the following disclaimer in
  29       the documentation and/or other materials provided with the
  30       distribution.
  31     * Neither the name of Intel Corporation nor the names of its
  32       contributors may be used to endorse or promote products derived
  33       from this software without specific prior written permission.
  34
  35   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  36   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  37   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  38   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  39   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  41   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  42   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  43   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  44   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  45   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46 */
  47 #include <linux/kernel.h>
  48 #include <linux/module.h>
  49 #include <linux/pci.h>
  50 #include <linux/init.h>
  51 #include <linux/types.h>
  52 #include <linux/fs.h>
  53 #include <linux/slab.h>
  54 #include <linux/errno.h>
  55 #include <linux/device.h>
  56 #include <linux/dma-mapping.h>
  57 #include <linux/platform_device.h>
  58 #include <linux/workqueue.h>
  59 #include <linux/io.h>
  60 #include <adf_accel_devices.h>
  61 #include <adf_common_drv.h>
  62 #include <adf_cfg.h>
  63 #include "adf_c3xxx_hw_data.h"
  64
  65 #define ADF_SYSTEM_DEVICE(device_id) \
  66         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
  67
  68 static const struct pci_device_id adf_pci_tbl[] = {
  69         ADF_SYSTEM_DEVICE(ADF_C3XXX_PCI_DEVICE_ID),
  70         {0,}
  71 };
  72 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
  73
  74 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
  75 static void adf_remove(struct pci_dev *dev);
  76
  77 static struct pci_driver adf_driver = {
  78         .id_table = adf_pci_tbl,
  79         .name = ADF_C3XXX_DEVICE_NAME,
  80         .probe = adf_probe,
  81         .remove = adf_remove,
  82         .sriov_configure = adf_sriov_configure,
  83 };
  84
  85 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
  86 {
  87         pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
  88         pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
  89 }
  90
  91 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
  92 {
  93         struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
  94         int i;
  95
  96         for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
  97                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
  98
  99                 if (bar->virt_addr)
 100                         pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
 101         }
 102
 103         if (accel_dev->hw_device) {
 104                 switch (accel_pci_dev->pci_dev->device) {
 105                 case ADF_C3XXX_PCI_DEVICE_ID:
 106                         adf_clean_hw_data_c3xxx(accel_dev->hw_device);
 107                         break;
 108                 default:
 109                         break;
 110                 }
 111                 kfree(accel_dev->hw_device);
 112                 accel_dev->hw_device = NULL;
 113         }
 114         adf_cfg_dev_remove(accel_dev);
 115         debugfs_remove(accel_dev->debugfs_dir);
 116         adf_devmgr_rm_dev(accel_dev, NULL);
 117 }
 118
 119 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 120 {
 121         struct adf_accel_dev *accel_dev;
 122         struct adf_accel_pci *accel_pci_dev;
 123         struct adf_hw_device_data *hw_data;
 124         char name[ADF_DEVICE_NAME_LENGTH];
 125         unsigned int i, bar_nr;
 126         unsigned long bar_mask;
 127         int ret;
 128
 129         switch (ent->device) {
 130         case ADF_C3XXX_PCI_DEVICE_ID:
 131                 break;
 132         default:
 133                 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
 134                 return -ENODEV;
 135         }
 136
 137         if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
 138                 /* If the accelerator is connected to a node with no memory
 139                  * there is no point in using the accelerator since the remote
 140                  * memory transaction will be very slow. */
 141                 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
 142                 return -EINVAL;
 143         }
 144
 145         accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
 146                                  dev_to_node(&pdev->dev));
 147         if (!accel_dev)
 148                 return -ENOMEM;
 149
 150         INIT_LIST_HEAD(&accel_dev->crypto_list);
 151         accel_pci_dev = &accel_dev->accel_pci_dev;
 152         accel_pci_dev->pci_dev = pdev;
 153
 154         /* Add accel device to accel table.
 155          * This should be called before adf_cleanup_accel is called */
 156         if (adf_devmgr_add_dev(accel_dev, NULL)) {
 157                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 158                 kfree(accel_dev);
 159                 return -EFAULT;
 160         }
 161
 162         accel_dev->owner = THIS_MODULE;
 163         /* Allocate and configure device configuration structure */
 164         hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 165                                dev_to_node(&pdev->dev));
 166         if (!hw_data) {
 167                 ret = -ENOMEM;
 168                 goto out_err;
 169         }
 170
 171         accel_dev->hw_device = hw_data;
 172         adf_init_hw_data_c3xxx(accel_dev->hw_device);
 173         pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 174         pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
 175                               &hw_data->fuses);
 176
 177         /* Get Accelerators and Accelerators Engines masks */
 178         hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
 179         hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
 180         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 181         /* If the device has no acceleration engines then ignore it. */
 182         if (!hw_data->accel_mask || !hw_data->ae_mask ||
 183             ((~hw_data->ae_mask) & 0x01)) {
 184                 dev_err(&pdev->dev, "No acceleration units found");
 185                 ret = -EFAULT;
 186                 goto out_err;
 187         }
 188
 189         /* Create dev top level debugfs entry */
 190         snprintf(name, sizeof(name), "%s%s_%02x:%02d.%d",
 191                  ADF_DEVICE_NAME_PREFIX, hw_data->dev_class->name,
 192                  pdev->bus->number, PCI_SLOT(pdev->devfn),
 193                  PCI_FUNC(pdev->devfn));
 194
 195         accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 196
 197         /* Create device configuration table */
 198         ret = adf_cfg_dev_add(accel_dev);
 199         if (ret)
 200                 goto out_err;
 201
 202         /* enable PCI device */
 203         if (pci_enable_device(pdev)) {
 204                 ret = -EFAULT;
 205                 goto out_err;
 206         }
 207
 208         /* set dma identifier */
 209         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 210                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 211                         dev_err(&pdev->dev, "No usable DMA configuration\n");
 212                         ret = -EFAULT;
 213                         goto out_err_disable;
 214                 } else {
 215                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 216                 }
 217
 218         } else {
 219                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 220         }
 221
 222         if (pci_request_regions(pdev, ADF_C3XXX_DEVICE_NAME)) {
 223                 ret = -EFAULT;
 224                 goto out_err_disable;
 225         }
 226
 227         /* Read accelerator capabilities mask */
 228         pci_read_config_dword(pdev, ADF_DEVICE_LEGFUSE_OFFSET,
 229                               &hw_data->accel_capabilities_mask);
 230
 231         /* Find and map all the device's BARS */
 232         i = 0;
 233         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 234         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 235                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 236
 237                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 238                 if (!bar->base_addr)
 239                         break;
 240                 bar->size = pci_resource_len(pdev, bar_nr);
 241                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 242                 if (!bar->virt_addr) {
 243                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 244                         ret = -EFAULT;
 245                         goto out_err_free_reg;
 246                 }
 247         }
 248         pci_set_master(pdev);
 249
 250         if (adf_enable_aer(accel_dev, &adf_driver)) {
 251                 dev_err(&pdev->dev, "Failed to enable aer\n");
 252                 ret = -EFAULT;
 253                 goto out_err_free_reg;
 254         }
 255
 256         if (pci_save_state(pdev)) {
 257                 dev_err(&pdev->dev, "Failed to save pci state\n");
 258                 ret = -ENOMEM;
 259                 goto out_err_free_reg;
 260         }
 261
 262         ret = qat_crypto_dev_config(accel_dev);
 263         if (ret)
 264                 goto out_err_free_reg;
 265
 266         ret = adf_dev_init(accel_dev);
 267         if (ret)
 268                 goto out_err_dev_shutdown;
 269
 270         ret = adf_dev_start(accel_dev);
 271         if (ret)
 272                 goto out_err_dev_stop;
 273
 274         return ret;
 275
 276 out_err_dev_stop:
 277         adf_dev_stop(accel_dev);
 278 out_err_dev_shutdown:
 279         adf_dev_shutdown(accel_dev);
 280 out_err_free_reg:
 281         pci_release_regions(accel_pci_dev->pci_dev);
 282 out_err_disable:
 283         pci_disable_device(accel_pci_dev->pci_dev);
 284 out_err:
 285         adf_cleanup_accel(accel_dev);
 286         kfree(accel_dev);
 287         return ret;
 288 }
 289
 290 static void adf_remove(struct pci_dev *pdev)
 291 {
 292         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 293
 294         if (!accel_dev) {
 295                 pr_err("QAT: Driver removal failed\n");
 296                 return;
 297         }
 298         adf_dev_stop(accel_dev);
 299         adf_dev_shutdown(accel_dev);
 300         adf_disable_aer(accel_dev);
 301         adf_cleanup_accel(accel_dev);
 302         adf_cleanup_pci_dev(accel_dev);
 303         kfree(accel_dev);
 304 }
 305
 306 static int __init adfdrv_init(void)
 307 {
 308         request_module("intel_qat");
 309
 310         if (pci_register_driver(&adf_driver)) {
 311                 pr_err("QAT: Driver initialization failed\n");
 312                 return -EFAULT;
 313         }
 314         return 0;
 315 }
 316
 317 static void __exit adfdrv_release(void)
 318 {
 319         pci_unregister_driver(&adf_driver);
 320 }
 321
 322 module_init(adfdrv_init);
 323 module_exit(adfdrv_release);
 324
 325 MODULE_LICENSE("Dual BSD/GPL");
 326 MODULE_AUTHOR("Intel");
 327 MODULE_FIRMWARE(ADF_C3XXX_FW);
 328 MODULE_FIRMWARE(ADF_C3XXX_MMP);
 329 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 330 MODULE_VERSION(ADF_DRV_VERSION);