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         int ret, bar_mask;
 127
 128         switch (ent->device) {
 129         case ADF_C3XXX_PCI_DEVICE_ID:
 130                 break;
 131         default:
 132                 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
 133                 return -ENODEV;
 134         }
 135
 136         if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
 137                 /* If the accelerator is connected to a node with no memory
 138                  * there is no point in using the accelerator since the remote
 139                  * memory transaction will be very slow. */
 140                 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
 141                 return -EINVAL;
 142         }
 143
 144         accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
 145                                  dev_to_node(&pdev->dev));
 146         if (!accel_dev)
 147                 return -ENOMEM;
 148
 149         INIT_LIST_HEAD(&accel_dev->crypto_list);
 150         accel_pci_dev = &accel_dev->accel_pci_dev;
 151         accel_pci_dev->pci_dev = pdev;
 152
 153         /* Add accel device to accel table.
 154          * This should be called before adf_cleanup_accel is called */
 155         if (adf_devmgr_add_dev(accel_dev, NULL)) {
 156                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 157                 kfree(accel_dev);
 158                 return -EFAULT;
 159         }
 160
 161         accel_dev->owner = THIS_MODULE;
 162         /* Allocate and configure device configuration structure */
 163         hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 164                                dev_to_node(&pdev->dev));
 165         if (!hw_data) {
 166                 ret = -ENOMEM;
 167                 goto out_err;
 168         }
 169
 170         accel_dev->hw_device = hw_data;
 171         adf_init_hw_data_c3xxx(accel_dev->hw_device);
 172         pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 173         pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
 174                               &hw_data->fuses);
 175
 176         /* Get Accelerators and Accelerators Engines masks */
 177         hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
 178         hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
 179         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 180         /* If the device has no acceleration engines then ignore it. */
 181         if (!hw_data->accel_mask || !hw_data->ae_mask ||
 182             ((~hw_data->ae_mask) & 0x01)) {
 183                 dev_err(&pdev->dev, "No acceleration units found");
 184                 ret = -EFAULT;
 185                 goto out_err;
 186         }
 187
 188         /* Create dev top level debugfs entry */
 189         snprintf(name, sizeof(name), "%s%s_%02x:%02d.%02d",
 190                  ADF_DEVICE_NAME_PREFIX, hw_data->dev_class->name,
 191                  pdev->bus->number, PCI_SLOT(pdev->devfn),
 192                  PCI_FUNC(pdev->devfn));
 193
 194         accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
 195         if (!accel_dev->debugfs_dir) {
 196                 dev_err(&pdev->dev, "Could not create debugfs dir %s\n", name);
 197                 ret = -EINVAL;
 198                 goto out_err;
 199         }
 200
 201         /* Create device configuration table */
 202         ret = adf_cfg_dev_add(accel_dev);
 203         if (ret)
 204                 goto out_err;
 205
 206         /* enable PCI device */
 207         if (pci_enable_device(pdev)) {
 208                 ret = -EFAULT;
 209                 goto out_err;
 210         }
 211
 212         /* set dma identifier */
 213         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
 214                 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
 215                         dev_err(&pdev->dev, "No usable DMA configuration\n");
 216                         ret = -EFAULT;
 217                         goto out_err_disable;
 218                 } else {
 219                         pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 220                 }
 221
 222         } else {
 223                 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 224         }
 225
 226         if (pci_request_regions(pdev, ADF_C3XXX_DEVICE_NAME)) {
 227                 ret = -EFAULT;
 228                 goto out_err_disable;
 229         }
 230
 231         /* Read accelerator capabilities mask */
 232         pci_read_config_dword(pdev, ADF_DEVICE_LEGFUSE_OFFSET,
 233                               &hw_data->accel_capabilities_mask);
 234
 235         /* Find and map all the device's BARS */
 236         i = 0;
 237         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 238         for_each_set_bit(bar_nr, (const unsigned long *)&bar_mask,
 239                          ADF_PCI_MAX_BARS * 2) {
 240                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 241
 242                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 243                 if (!bar->base_addr)
 244                         break;
 245                 bar->size = pci_resource_len(pdev, bar_nr);
 246                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 247                 if (!bar->virt_addr) {
 248                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 249                         ret = -EFAULT;
 250                         goto out_err_free_reg;
 251                 }
 252         }
 253         pci_set_master(pdev);
 254
 255         if (adf_enable_aer(accel_dev, &adf_driver)) {
 256                 dev_err(&pdev->dev, "Failed to enable aer\n");
 257                 ret = -EFAULT;
 258                 goto out_err_free_reg;
 259         }
 260
 261         if (pci_save_state(pdev)) {
 262                 dev_err(&pdev->dev, "Failed to save pci state\n");
 263                 ret = -ENOMEM;
 264                 goto out_err_free_reg;
 265         }
 266
 267         ret = qat_crypto_dev_config(accel_dev);
 268         if (ret)
 269                 goto out_err_free_reg;
 270
 271         ret = adf_dev_init(accel_dev);
 272         if (ret)
 273                 goto out_err_dev_shutdown;
 274
 275         ret = adf_dev_start(accel_dev);
 276         if (ret)
 277                 goto out_err_dev_stop;
 278
 279         return ret;
 280
 281 out_err_dev_stop:
 282         adf_dev_stop(accel_dev);
 283 out_err_dev_shutdown:
 284         adf_dev_shutdown(accel_dev);
 285 out_err_free_reg:
 286         pci_release_regions(accel_pci_dev->pci_dev);
 287 out_err_disable:
 288         pci_disable_device(accel_pci_dev->pci_dev);
 289 out_err:
 290         adf_cleanup_accel(accel_dev);
 291         kfree(accel_dev);
 292         return ret;
 293 }
 294
 295 static void adf_remove(struct pci_dev *pdev)
 296 {
 297         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 298
 299         if (!accel_dev) {
 300                 pr_err("QAT: Driver removal failed\n");
 301                 return;
 302         }
 303         if (adf_dev_stop(accel_dev))
 304                 dev_err(&GET_DEV(accel_dev), "Failed to stop QAT accel dev\n");
 305
 306         adf_dev_shutdown(accel_dev);
 307         adf_disable_aer(accel_dev);
 308         adf_cleanup_accel(accel_dev);
 309         adf_cleanup_pci_dev(accel_dev);
 310         kfree(accel_dev);
 311 }
 312
 313 static int __init adfdrv_init(void)
 314 {
 315         request_module("intel_qat");
 316
 317         if (pci_register_driver(&adf_driver)) {
 318                 pr_err("QAT: Driver initialization failed\n");
 319                 return -EFAULT;
 320         }
 321         return 0;
 322 }
 323
 324 static void __exit adfdrv_release(void)
 325 {
 326         pci_unregister_driver(&adf_driver);
 327 }
 328
 329 module_init(adfdrv_init);
 330 module_exit(adfdrv_release);
 331
 332 MODULE_LICENSE("Dual BSD/GPL");
 333 MODULE_AUTHOR("Intel");
 334 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 335 MODULE_VERSION(ADF_DRV_VERSION);