drivers/crypto/qat/qat_c62xvf/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_c62xvf_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_C62XIOV_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_C62XVF_DEVICE_NAME,
  80         .probe = adf_probe,
  81         .remove = adf_remove,
  82 };
  83
  84 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
  85 {
  86         pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
  87         pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
  88 }
  89
  90 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
  91 {
  92         struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
  93         struct adf_accel_dev *pf;
  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_C62XIOV_PCI_DEVICE_ID:
 106                         adf_clean_hw_data_c62xiov(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         pf = adf_devmgr_pci_to_accel_dev(accel_pci_dev->pci_dev->physfn);
 117         adf_devmgr_rm_dev(accel_dev, pf);
 118 }
 119
 120 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 121 {
 122         struct adf_accel_dev *accel_dev;
 123         struct adf_accel_dev *pf;
 124         struct adf_accel_pci *accel_pci_dev;
 125         struct adf_hw_device_data *hw_data;
 126         char name[ADF_DEVICE_NAME_LENGTH];
 127         unsigned int i, bar_nr;
 128         unsigned long bar_mask;
 129         int ret;
 130
 131         switch (ent->device) {
 132         case ADF_C62XIOV_PCI_DEVICE_ID:
 133                 break;
 134         default:
 135                 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
 136                 return -ENODEV;
 137         }
 138
 139         accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
 140                                  dev_to_node(&pdev->dev));
 141         if (!accel_dev)
 142                 return -ENOMEM;
 143
 144         accel_dev->is_vf = true;
 145         pf = adf_devmgr_pci_to_accel_dev(pdev->physfn);
 146         accel_pci_dev = &accel_dev->accel_pci_dev;
 147         accel_pci_dev->pci_dev = pdev;
 148
 149         /* Add accel device to accel table */
 150         if (adf_devmgr_add_dev(accel_dev, pf)) {
 151                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 152                 kfree(accel_dev);
 153                 return -EFAULT;
 154         }
 155         INIT_LIST_HEAD(&accel_dev->crypto_list);
 156
 157         accel_dev->owner = THIS_MODULE;
 158         /* Allocate and configure device configuration structure */
 159         hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 160                                dev_to_node(&pdev->dev));
 161         if (!hw_data) {
 162                 ret = -ENOMEM;
 163                 goto out_err;
 164         }
 165         accel_dev->hw_device = hw_data;
 166         adf_init_hw_data_c62xiov(accel_dev->hw_device);
 167
 168         /* Get Accelerators and Accelerators Engines masks */
 169         hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
 170         hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
 171         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 172
 173         /* Create dev top level debugfs entry */
 174         snprintf(name, sizeof(name), "%s%s_%02x:%02d.%d",
 175                  ADF_DEVICE_NAME_PREFIX, hw_data->dev_class->name,
 176                  pdev->bus->number, PCI_SLOT(pdev->devfn),
 177                  PCI_FUNC(pdev->devfn));
 178
 179         accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 180         if (!accel_dev->debugfs_dir) {
 181                 dev_err(&pdev->dev, "Could not create debugfs dir %s\n", name);
 182                 ret = -EINVAL;
 183                 goto out_err;
 184         }
 185
 186         /* Create device configuration table */
 187         ret = adf_cfg_dev_add(accel_dev);
 188         if (ret)
 189                 goto out_err;
 190
 191         /* enable PCI device */
 192         if (pci_enable_device(pdev)) {
 193                 ret = -EFAULT;
 194                 goto out_err;
 195         }
 196
 197         /* set dma identifier */
 198         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 199                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 200                         dev_err(&pdev->dev, "No usable DMA configuration\n");
 201                         ret = -EFAULT;
 202                         goto out_err_disable;
 203                 } else {
 204                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 205                 }
 206
 207         } else {
 208                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 209         }
 210
 211         if (pci_request_regions(pdev, ADF_C62XVF_DEVICE_NAME)) {
 212                 ret = -EFAULT;
 213                 goto out_err_disable;
 214         }
 215
 216         /* Find and map all the device's BARS */
 217         i = 0;
 218         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 219         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 220                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 221
 222                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 223                 if (!bar->base_addr)
 224                         break;
 225                 bar->size = pci_resource_len(pdev, bar_nr);
 226                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 227                 if (!bar->virt_addr) {
 228                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 229                         ret = -EFAULT;
 230                         goto out_err_free_reg;
 231                 }
 232         }
 233         pci_set_master(pdev);
 234         /* Completion for VF2PF request/response message exchange */
 235         init_completion(&accel_dev->vf.iov_msg_completion);
 236
 237         ret = qat_crypto_dev_config(accel_dev);
 238         if (ret)
 239                 goto out_err_free_reg;
 240
 241         set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
 242
 243         ret = adf_dev_init(accel_dev);
 244         if (ret)
 245                 goto out_err_dev_shutdown;
 246
 247         ret = adf_dev_start(accel_dev);
 248         if (ret)
 249                 goto out_err_dev_stop;
 250
 251         return ret;
 252
 253 out_err_dev_stop:
 254         adf_dev_stop(accel_dev);
 255 out_err_dev_shutdown:
 256         adf_dev_shutdown(accel_dev);
 257 out_err_free_reg:
 258         pci_release_regions(accel_pci_dev->pci_dev);
 259 out_err_disable:
 260         pci_disable_device(accel_pci_dev->pci_dev);
 261 out_err:
 262         adf_cleanup_accel(accel_dev);
 263         kfree(accel_dev);
 264         return ret;
 265 }
 266
 267 static void adf_remove(struct pci_dev *pdev)
 268 {
 269         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 270
 271         if (!accel_dev) {
 272                 pr_err("QAT: Driver removal failed\n");
 273                 return;
 274         }
 275         adf_dev_stop(accel_dev);
 276         adf_dev_shutdown(accel_dev);
 277         adf_cleanup_accel(accel_dev);
 278         adf_cleanup_pci_dev(accel_dev);
 279         kfree(accel_dev);
 280 }
 281
 282 static int __init adfdrv_init(void)
 283 {
 284         request_module("intel_qat");
 285
 286         if (pci_register_driver(&adf_driver)) {
 287                 pr_err("QAT: Driver initialization failed\n");
 288                 return -EFAULT;
 289         }
 290         return 0;
 291 }
 292
 293 static void __exit adfdrv_release(void)
 294 {
 295         pci_unregister_driver(&adf_driver);
 296         adf_clean_vf_map(true);
 297 }
 298
 299 module_init(adfdrv_init);
 300 module_exit(adfdrv_release);
 301
 302 MODULE_LICENSE("Dual BSD/GPL");
 303 MODULE_AUTHOR("Intel");
 304 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 305 MODULE_VERSION(ADF_DRV_VERSION);