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_c3xxx_hw_data.h"
20
21 static const struct pci_device_id adf_pci_tbl[] = {
22 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C3XXX), },
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_C3XXX_DEVICE_NAME,
33 .probe = adf_probe,
34 .remove = adf_remove,
35 .sriov_configure = adf_sriov_configure,
36 };
37
adf_cleanup_pci_dev(struct adf_accel_dev * accel_dev)38 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
39 {
40 pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
41 pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
42 }
43
adf_cleanup_accel(struct adf_accel_dev * accel_dev)44 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
45 {
46 struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
47 int i;
48
49 for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
50 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
51
52 if (bar->virt_addr)
53 pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
54 }
55
56 if (accel_dev->hw_device) {
57 switch (accel_pci_dev->pci_dev->device) {
58 case PCI_DEVICE_ID_INTEL_QAT_C3XXX:
59 adf_clean_hw_data_c3xxx(accel_dev->hw_device);
60 break;
61 default:
62 break;
63 }
64 kfree(accel_dev->hw_device);
65 accel_dev->hw_device = NULL;
66 }
67 adf_cfg_dev_remove(accel_dev);
68 debugfs_remove(accel_dev->debugfs_dir);
69 adf_devmgr_rm_dev(accel_dev, NULL);
70 }
71
adf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)72 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
73 {
74 struct adf_accel_dev *accel_dev;
75 struct adf_accel_pci *accel_pci_dev;
76 struct adf_hw_device_data *hw_data;
77 char name[ADF_DEVICE_NAME_LENGTH];
78 unsigned int i, bar_nr;
79 unsigned long bar_mask;
80 int ret;
81
82 switch (ent->device) {
83 case PCI_DEVICE_ID_INTEL_QAT_C3XXX:
84 break;
85 default:
86 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
87 return -ENODEV;
88 }
89
90 if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
91 /* If the accelerator is connected to a node with no memory
92 * there is no point in using the accelerator since the remote
93 * memory transaction will be very slow. */
94 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
95 return -EINVAL;
96 }
97
98 accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
99 dev_to_node(&pdev->dev));
100 if (!accel_dev)
101 return -ENOMEM;
102
103 INIT_LIST_HEAD(&accel_dev->crypto_list);
104 accel_pci_dev = &accel_dev->accel_pci_dev;
105 accel_pci_dev->pci_dev = pdev;
106
107 /* Add accel device to accel table.
108 * This should be called before adf_cleanup_accel is called */
109 if (adf_devmgr_add_dev(accel_dev, NULL)) {
110 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
111 kfree(accel_dev);
112 return -EFAULT;
113 }
114
115 accel_dev->owner = THIS_MODULE;
116 /* Allocate and configure device configuration structure */
117 hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
118 dev_to_node(&pdev->dev));
119 if (!hw_data) {
120 ret = -ENOMEM;
121 goto out_err;
122 }
123
124 accel_dev->hw_device = hw_data;
125 adf_init_hw_data_c3xxx(accel_dev->hw_device);
126 pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
127 pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
128 &hw_data->fuses);
129
130 /* Get Accelerators and Accelerators Engines masks */
131 hw_data->accel_mask = hw_data->get_accel_mask(hw_data->fuses);
132 hw_data->ae_mask = hw_data->get_ae_mask(hw_data->fuses);
133 accel_pci_dev->sku = hw_data->get_sku(hw_data);
134 /* If the device has no acceleration engines then ignore it. */
135 if (!hw_data->accel_mask || !hw_data->ae_mask ||
136 ((~hw_data->ae_mask) & 0x01)) {
137 dev_err(&pdev->dev, "No acceleration units found");
138 ret = -EFAULT;
139 goto out_err;
140 }
141
142 /* Create dev top level debugfs entry */
143 snprintf(name, sizeof(name), "%s%s_%s", ADF_DEVICE_NAME_PREFIX,
144 hw_data->dev_class->name, pci_name(pdev));
145
146 accel_dev->debugfs_dir = debugfs_create_dir(name, NULL);
147
148 /* Create device configuration table */
149 ret = adf_cfg_dev_add(accel_dev);
150 if (ret)
151 goto out_err;
152
153 /* enable PCI device */
154 if (pci_enable_device(pdev)) {
155 ret = -EFAULT;
156 goto out_err;
157 }
158
159 /* set dma identifier */
160 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
161 if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
162 dev_err(&pdev->dev, "No usable DMA configuration\n");
163 ret = -EFAULT;
164 goto out_err_disable;
165 } else {
166 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
167 }
168
169 } else {
170 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
171 }
172
173 if (pci_request_regions(pdev, ADF_C3XXX_DEVICE_NAME)) {
174 ret = -EFAULT;
175 goto out_err_disable;
176 }
177
178 /* Read accelerator capabilities mask */
179 pci_read_config_dword(pdev, ADF_DEVICE_LEGFUSE_OFFSET,
180 &hw_data->accel_capabilities_mask);
181
182 /* Find and map all the device's BARS */
183 i = 0;
184 bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
185 for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
186 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
187
188 bar->base_addr = pci_resource_start(pdev, bar_nr);
189 if (!bar->base_addr)
190 break;
191 bar->size = pci_resource_len(pdev, bar_nr);
192 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
193 if (!bar->virt_addr) {
194 dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
195 ret = -EFAULT;
196 goto out_err_free_reg;
197 }
198 }
199 pci_set_master(pdev);
200
201 if (adf_enable_aer(accel_dev)) {
202 dev_err(&pdev->dev, "Failed to enable aer\n");
203 ret = -EFAULT;
204 goto out_err_free_reg;
205 }
206
207 if (pci_save_state(pdev)) {
208 dev_err(&pdev->dev, "Failed to save pci state\n");
209 ret = -ENOMEM;
210 goto out_err_free_reg;
211 }
212
213 ret = qat_crypto_dev_config(accel_dev);
214 if (ret)
215 goto out_err_free_reg;
216
217 ret = adf_dev_init(accel_dev);
218 if (ret)
219 goto out_err_dev_shutdown;
220
221 ret = adf_dev_start(accel_dev);
222 if (ret)
223 goto out_err_dev_stop;
224
225 return ret;
226
227 out_err_dev_stop:
228 adf_dev_stop(accel_dev);
229 out_err_dev_shutdown:
230 adf_dev_shutdown(accel_dev);
231 out_err_free_reg:
232 pci_release_regions(accel_pci_dev->pci_dev);
233 out_err_disable:
234 pci_disable_device(accel_pci_dev->pci_dev);
235 out_err:
236 adf_cleanup_accel(accel_dev);
237 kfree(accel_dev);
238 return ret;
239 }
240
adf_remove(struct pci_dev * pdev)241 static void adf_remove(struct pci_dev *pdev)
242 {
243 struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
244
245 if (!accel_dev) {
246 pr_err("QAT: Driver removal failed\n");
247 return;
248 }
249 adf_dev_stop(accel_dev);
250 adf_dev_shutdown(accel_dev);
251 adf_disable_aer(accel_dev);
252 adf_cleanup_accel(accel_dev);
253 adf_cleanup_pci_dev(accel_dev);
254 kfree(accel_dev);
255 }
256
adfdrv_init(void)257 static int __init adfdrv_init(void)
258 {
259 request_module("intel_qat");
260
261 if (pci_register_driver(&adf_driver)) {
262 pr_err("QAT: Driver initialization failed\n");
263 return -EFAULT;
264 }
265 return 0;
266 }
267
adfdrv_release(void)268 static void __exit adfdrv_release(void)
269 {
270 pci_unregister_driver(&adf_driver);
271 }
272
273 module_init(adfdrv_init);
274 module_exit(adfdrv_release);
275
276 MODULE_LICENSE("Dual BSD/GPL");
277 MODULE_AUTHOR("Intel");
278 MODULE_FIRMWARE(ADF_C3XXX_FW);
279 MODULE_FIRMWARE(ADF_C3XXX_MMP);
280 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
281 MODULE_VERSION(ADF_DRV_VERSION);
282