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_c62x_hw_data.h"
20
21 static const struct pci_device_id adf_pci_tbl[] = {
22 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C62X), },
23 { }
24 };
25 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
26
27 static int adf_probe(struct pci_dev *dev, const struct pci_device_id *ent);
28 static void adf_remove(struct pci_dev *dev);
29
30 static struct pci_driver adf_driver = {
31 .id_table = adf_pci_tbl,
32 .name = ADF_C62X_DEVICE_NAME,
33 .probe = adf_probe,
34 .remove = adf_remove,
35 .sriov_configure = adf_sriov_configure,
36 .err_handler = &adf_err_handler,
37 };
38
adf_cleanup_pci_dev(struct adf_accel_dev * accel_dev)39 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
40 {
41 pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
42 pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
43 }
44
adf_cleanup_accel(struct adf_accel_dev * accel_dev)45 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
46 {
47 struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
48 int i;
49
50 for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
51 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
52
53 if (bar->virt_addr)
54 pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
55 }
56
57 if (accel_dev->hw_device) {
58 switch (accel_pci_dev->pci_dev->device) {
59 case PCI_DEVICE_ID_INTEL_QAT_C62X:
60 adf_clean_hw_data_c62x(accel_dev->hw_device);
61 break;
62 default:
63 break;
64 }
65 kfree(accel_dev->hw_device);
66 accel_dev->hw_device = NULL;
67 }
68 adf_cfg_dev_remove(accel_dev);
69 debugfs_remove(accel_dev->debugfs_dir);
70 adf_devmgr_rm_dev(accel_dev, NULL);
71 }
72
adf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)73 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
74 {
75 struct adf_accel_dev *accel_dev;
76 struct adf_accel_pci *accel_pci_dev;
77 struct adf_hw_device_data *hw_data;
78 char name[ADF_DEVICE_NAME_LENGTH];
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 dev top level debugfs entry */
146 snprintf(name, sizeof(name), "%s%s_%s", ADF_DEVICE_NAME_PREFIX,
147 hw_data->dev_class->name, pci_name(pdev));
148
149 accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
150
151 /* Create device configuration table */
152 ret = adf_cfg_dev_add(accel_dev);
153 if (ret)
154 goto out_err;
155
156 /* enable PCI device */
157 if (pci_enable_device(pdev)) {
158 ret = -EFAULT;
159 goto out_err;
160 }
161
162 /* set dma identifier */
163 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
164 if (ret) {
165 dev_err(&pdev->dev, "No usable DMA configuration\n");
166 goto out_err_disable;
167 }
168
169 if (pci_request_regions(pdev, ADF_C62X_DEVICE_NAME)) {
170 ret = -EFAULT;
171 goto out_err_disable;
172 }
173
174 /* Get accelerator capabilities mask */
175 hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
176
177 /* Find and map all the device's BARS */
178 i = (hw_data->fuses & ADF_DEVICE_FUSECTL_MASK) ? 1 : 0;
179 bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
180 for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
181 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
182
183 bar->base_addr = pci_resource_start(pdev, bar_nr);
184 if (!bar->base_addr)
185 break;
186 bar->size = pci_resource_len(pdev, bar_nr);
187 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
188 if (!bar->virt_addr) {
189 dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
190 ret = -EFAULT;
191 goto out_err_free_reg;
192 }
193 }
194 pci_set_master(pdev);
195
196 adf_enable_aer(accel_dev);
197
198 if (pci_save_state(pdev)) {
199 dev_err(&pdev->dev, "Failed to save pci state\n");
200 ret = -ENOMEM;
201 goto out_err_disable_aer;
202 }
203
204 ret = qat_crypto_dev_config(accel_dev);
205 if (ret)
206 goto out_err_disable_aer;
207
208 ret = adf_dev_init(accel_dev);
209 if (ret)
210 goto out_err_dev_shutdown;
211
212 ret = adf_dev_start(accel_dev);
213 if (ret)
214 goto out_err_dev_stop;
215
216 return ret;
217
218 out_err_dev_stop:
219 adf_dev_stop(accel_dev);
220 out_err_dev_shutdown:
221 adf_dev_shutdown(accel_dev);
222 out_err_disable_aer:
223 adf_disable_aer(accel_dev);
224 out_err_free_reg:
225 pci_release_regions(accel_pci_dev->pci_dev);
226 out_err_disable:
227 pci_disable_device(accel_pci_dev->pci_dev);
228 out_err:
229 adf_cleanup_accel(accel_dev);
230 kfree(accel_dev);
231 return ret;
232 }
233
adf_remove(struct pci_dev * pdev)234 static void adf_remove(struct pci_dev *pdev)
235 {
236 struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
237
238 if (!accel_dev) {
239 pr_err("QAT: Driver removal failed\n");
240 return;
241 }
242 adf_dev_stop(accel_dev);
243 adf_dev_shutdown(accel_dev);
244 adf_disable_aer(accel_dev);
245 adf_cleanup_accel(accel_dev);
246 adf_cleanup_pci_dev(accel_dev);
247 kfree(accel_dev);
248 }
249
adfdrv_init(void)250 static int __init adfdrv_init(void)
251 {
252 request_module("intel_qat");
253
254 if (pci_register_driver(&adf_driver)) {
255 pr_err("QAT: Driver initialization failed\n");
256 return -EFAULT;
257 }
258 return 0;
259 }
260
adfdrv_release(void)261 static void __exit adfdrv_release(void)
262 {
263 pci_unregister_driver(&adf_driver);
264 }
265
266 module_init(adfdrv_init);
267 module_exit(adfdrv_release);
268
269 MODULE_LICENSE("Dual BSD/GPL");
270 MODULE_AUTHOR("Intel");
271 MODULE_FIRMWARE(ADF_C62X_FW);
272 MODULE_FIRMWARE(ADF_C62X_MMP);
273 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
274 MODULE_VERSION(ADF_DRV_VERSION);
275