drivers/crypto/intel/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_dbgfs.h>
  20 #include "adf_c62x_hw_data.h"
  21
  22 static const struct pci_device_id adf_pci_tbl[] = {
  23         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C62X), },
  24         { }
  25 };
  26 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
  27
  28 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
  29 static void adf_remove(struct pci_dev *dev);
  30
  31 static struct pci_driver adf_driver = {
  32         .id_table = adf_pci_tbl,
  33         .name = ADF_C62X_DEVICE_NAME,
  34         .probe = adf_probe,
  35         .remove = adf_remove,
  36         .sriov_configure = adf_sriov_configure,
  37         .err_handler = &adf_err_handler,
  38 };
  39
  40 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
  41 {
  42         pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
  43         pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
  44 }
  45
  46 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
  47 {
  48         struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
  49         int i;
  50
  51         for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
  52                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
  53
  54                 if (bar->virt_addr)
  55                         pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
  56         }
  57
  58         if (accel_dev->hw_device) {
  59                 switch (accel_pci_dev->pci_dev->device) {
  60                 case PCI_DEVICE_ID_INTEL_QAT_C62X:
  61                         adf_clean_hw_data_c62x(accel_dev->hw_device);
  62                         break;
  63                 default:
  64                         break;
  65                 }
  66                 kfree(accel_dev->hw_device);
  67                 accel_dev->hw_device = NULL;
  68         }
  69         adf_dbgfs_exit(accel_dev);
  70         adf_cfg_dev_remove(accel_dev);
  71         adf_devmgr_rm_dev(accel_dev, NULL);
  72 }
  73
  74 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  75 {
  76         struct adf_accel_dev *accel_dev;
  77         struct adf_accel_pci *accel_pci_dev;
  78         struct adf_hw_device_data *hw_data;
  79         unsigned int i, bar_nr;
  80         unsigned long bar_mask;
  81         int ret;
  82
  83         switch (ent->device) {
  84         case PCI_DEVICE_ID_INTEL_QAT_C62X:
  85                 break;
  86         default:
  87                 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
  88                 return -ENODEV;
  89         }
  90
  91         if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
  92                 /* If the accelerator is connected to a node with no memory
  93                  * there is no point in using the accelerator since the remote
  94                  * memory transaction will be very slow. */
  95                 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
  96                 return -EINVAL;
  97         }
  98
  99         accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
 100                                  dev_to_node(&pdev->dev));
 101         if (!accel_dev)
 102                 return -ENOMEM;
 103
 104         INIT_LIST_HEAD(&accel_dev->crypto_list);
 105         accel_pci_dev = &accel_dev->accel_pci_dev;
 106         accel_pci_dev->pci_dev = pdev;
 107
 108         /* Add accel device to accel table.
 109          * This should be called before adf_cleanup_accel is called */
 110         if (adf_devmgr_add_dev(accel_dev, NULL)) {
 111                 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 112                 kfree(accel_dev);
 113                 return -EFAULT;
 114         }
 115
 116         accel_dev->owner = THIS_MODULE;
 117         /* Allocate and configure device configuration structure */
 118         hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
 119                                dev_to_node(&pdev->dev));
 120         if (!hw_data) {
 121                 ret = -ENOMEM;
 122                 goto out_err;
 123         }
 124
 125         accel_dev->hw_device = hw_data;
 126         adf_init_hw_data_c62x(accel_dev->hw_device);
 127         pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 128         pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
 129                               &hw_data->fuses);
 130         pci_read_config_dword(pdev, ADF_C62X_SOFTSTRAP_CSR_OFFSET,
 131                               &hw_data->straps);
 132
 133         /* Get Accelerators and Accelerators Engines masks */
 134         hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
 135         hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
 136         accel_pci_dev->sku = hw_data->get_sku(hw_data);
 137         /* If the device has no acceleration engines then ignore it. */
 138         if (!hw_data->accel_mask || !hw_data->ae_mask ||
 139             ((~hw_data->ae_mask) & 0x01)) {
 140                 dev_err(&pdev->dev, "No acceleration units found");
 141                 ret = -EFAULT;
 142                 goto out_err;
 143         }
 144
 145         /* Create device configuration table */
 146         ret = adf_cfg_dev_add(accel_dev);
 147         if (ret)
 148                 goto out_err;
 149
 150         /* enable PCI device */
 151         if (pci_enable_device(pdev)) {
 152                 ret = -EFAULT;
 153                 goto out_err;
 154         }
 155
 156         /* set dma identifier */
 157         ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
 158         if (ret) {
 159                 dev_err(&pdev->dev, "No usable DMA configuration\n");
 160                 goto out_err_disable;
 161         }
 162
 163         if (pci_request_regions(pdev, ADF_C62X_DEVICE_NAME)) {
 164                 ret = -EFAULT;
 165                 goto out_err_disable;
 166         }
 167
 168         /* Get accelerator capabilities mask */
 169         hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
 170
 171         /* Find and map all the device's BARS */
 172         i = (hw_data->fuses & ADF_DEVICE_FUSECTL_MASK) ? 1 : 0;
 173         bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
 174         for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
 175                 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
 176
 177                 bar->base_addr = pci_resource_start(pdev, bar_nr);
 178                 if (!bar->base_addr)
 179                         break;
 180                 bar->size = pci_resource_len(pdev, bar_nr);
 181                 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
 182                 if (!bar->virt_addr) {
 183                         dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
 184                         ret = -EFAULT;
 185                         goto out_err_free_reg;
 186                 }
 187         }
 188         pci_set_master(pdev);
 189
 190         if (pci_save_state(pdev)) {
 191                 dev_err(&pdev->dev, "Failed to save pci state\n");
 192                 ret = -ENOMEM;
 193                 goto out_err_free_reg;
 194         }
 195
 196         adf_dbgfs_init(accel_dev);
 197
 198         ret = adf_dev_up(accel_dev, true);
 199         if (ret)
 200                 goto out_err_dev_stop;
 201
 202         return ret;
 203
 204 out_err_dev_stop:
 205         adf_dev_down(accel_dev);
 206 out_err_free_reg:
 207         pci_release_regions(accel_pci_dev->pci_dev);
 208 out_err_disable:
 209         pci_disable_device(accel_pci_dev->pci_dev);
 210 out_err:
 211         adf_cleanup_accel(accel_dev);
 212         kfree(accel_dev);
 213         return ret;
 214 }
 215
 216 static void adf_remove(struct pci_dev *pdev)
 217 {
 218         struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
 219
 220         if (!accel_dev) {
 221                 pr_err("QAT: Driver removal failed\n");
 222                 return;
 223         }
 224         adf_dev_down(accel_dev);
 225         adf_cleanup_accel(accel_dev);
 226         adf_cleanup_pci_dev(accel_dev);
 227         kfree(accel_dev);
 228 }
 229
 230 static int __init adfdrv_init(void)
 231 {
 232         request_module("intel_qat");
 233
 234         if (pci_register_driver(&adf_driver)) {
 235                 pr_err("QAT: Driver initialization failed\n");
 236                 return -EFAULT;
 237         }
 238         return 0;
 239 }
 240
 241 static void __exit adfdrv_release(void)
 242 {
 243         pci_unregister_driver(&adf_driver);
 244 }
 245
 246 module_init(adfdrv_init);
 247 module_exit(adfdrv_release);
 248
 249 MODULE_LICENSE("Dual BSD/GPL");
 250 MODULE_AUTHOR("Intel");
 251 MODULE_FIRMWARE(ADF_C62X_FW);
 252 MODULE_FIRMWARE(ADF_C62X_MMP);
 253 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
 254 MODULE_VERSION(ADF_DRV_VERSION);
 255 MODULE_IMPORT_NS("CRYPTO_QAT");