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
adf_cleanup_pci_dev(struct adf_accel_dev * accel_dev)22 static void adf_cleanup_pci_dev(struct adf_accel_dev *accel_dev)
23 {
24 pci_release_regions(accel_dev->accel_pci_dev.pci_dev);
25 pci_disable_device(accel_dev->accel_pci_dev.pci_dev);
26 }
27
adf_cleanup_accel(struct adf_accel_dev * accel_dev)28 static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
29 {
30 struct adf_accel_pci *accel_pci_dev = &accel_dev->accel_pci_dev;
31 int i;
32
33 for (i = 0; i < ADF_PCI_MAX_BARS; i++) {
34 struct adf_bar *bar = &accel_pci_dev->pci_bars[i];
35
36 if (bar->virt_addr)
37 pci_iounmap(accel_pci_dev->pci_dev, bar->virt_addr);
38 }
39
40 if (accel_dev->hw_device) {
41 switch (accel_pci_dev->pci_dev->device) {
42 case PCI_DEVICE_ID_INTEL_QAT_C62X:
43 adf_clean_hw_data_c62x(accel_dev->hw_device);
44 break;
45 default:
46 break;
47 }
48 kfree(accel_dev->hw_device);
49 accel_dev->hw_device = NULL;
50 }
51 adf_dbgfs_exit(accel_dev);
52 adf_cfg_dev_remove(accel_dev);
53 adf_devmgr_rm_dev(accel_dev, NULL);
54 }
55
adf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)56 static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
57 {
58 struct adf_accel_dev *accel_dev;
59 struct adf_accel_pci *accel_pci_dev;
60 struct adf_hw_device_data *hw_data;
61 unsigned int i, bar_nr;
62 unsigned long bar_mask;
63 int ret;
64
65 switch (ent->device) {
66 case PCI_DEVICE_ID_INTEL_QAT_C62X:
67 break;
68 default:
69 dev_err(&pdev->dev, "Invalid device 0x%x.\n", ent->device);
70 return -ENODEV;
71 }
72
73 if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
74 /* If the accelerator is connected to a node with no memory
75 * there is no point in using the accelerator since the remote
76 * memory transaction will be very slow. */
77 dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
78 return -EINVAL;
79 }
80
81 accel_dev = kzalloc_node(sizeof(*accel_dev), GFP_KERNEL,
82 dev_to_node(&pdev->dev));
83 if (!accel_dev)
84 return -ENOMEM;
85
86 INIT_LIST_HEAD(&accel_dev->crypto_list);
87 accel_pci_dev = &accel_dev->accel_pci_dev;
88 accel_pci_dev->pci_dev = pdev;
89
90 /* Add accel device to accel table.
91 * This should be called before adf_cleanup_accel is called */
92 if (adf_devmgr_add_dev(accel_dev, NULL)) {
93 dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
94 kfree(accel_dev);
95 return -EFAULT;
96 }
97
98 accel_dev->owner = THIS_MODULE;
99 /* Allocate and configure device configuration structure */
100 hw_data = kzalloc_node(sizeof(*hw_data), GFP_KERNEL,
101 dev_to_node(&pdev->dev));
102 if (!hw_data) {
103 ret = -ENOMEM;
104 goto out_err;
105 }
106
107 accel_dev->hw_device = hw_data;
108 adf_init_hw_data_c62x(accel_dev->hw_device);
109 pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
110 pci_read_config_dword(pdev, ADF_DEVICE_FUSECTL_OFFSET,
111 &hw_data->fuses[ADF_FUSECTL0]);
112 pci_read_config_dword(pdev, ADF_C62X_SOFTSTRAP_CSR_OFFSET,
113 &hw_data->straps);
114
115 /* Get Accelerators and Accelerators Engines masks */
116 hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
117 hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
118 accel_pci_dev->sku = hw_data->get_sku(hw_data);
119 /* If the device has no acceleration engines then ignore it. */
120 if (!hw_data->accel_mask || !hw_data->ae_mask ||
121 ((~hw_data->ae_mask) & 0x01)) {
122 dev_err(&pdev->dev, "No acceleration units found");
123 ret = -EFAULT;
124 goto out_err;
125 }
126
127 /* Create device configuration table */
128 ret = adf_cfg_dev_add(accel_dev);
129 if (ret)
130 goto out_err;
131
132 /* enable PCI device */
133 if (pci_enable_device(pdev)) {
134 ret = -EFAULT;
135 goto out_err;
136 }
137
138 /* set dma identifier */
139 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(48));
140 if (ret) {
141 dev_err(&pdev->dev, "No usable DMA configuration\n");
142 goto out_err_disable;
143 }
144
145 if (pci_request_regions(pdev, ADF_C62X_DEVICE_NAME)) {
146 ret = -EFAULT;
147 goto out_err_disable;
148 }
149
150 /* Get accelerator capabilities mask */
151 hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
152
153 /* Find and map all the device's BARS */
154 i = (hw_data->fuses[ADF_FUSECTL0] & ADF_DEVICE_FUSECTL_MASK) ? 1 : 0;
155 bar_mask = pci_select_bars(pdev, IORESOURCE_MEM);
156 for_each_set_bit(bar_nr, &bar_mask, ADF_PCI_MAX_BARS * 2) {
157 struct adf_bar *bar = &accel_pci_dev->pci_bars[i++];
158
159 bar->base_addr = pci_resource_start(pdev, bar_nr);
160 if (!bar->base_addr)
161 break;
162 bar->size = pci_resource_len(pdev, bar_nr);
163 bar->virt_addr = pci_iomap(accel_pci_dev->pci_dev, bar_nr, 0);
164 if (!bar->virt_addr) {
165 dev_err(&pdev->dev, "Failed to map BAR %d\n", bar_nr);
166 ret = -EFAULT;
167 goto out_err_free_reg;
168 }
169 }
170 pci_set_master(pdev);
171
172 if (pci_save_state(pdev)) {
173 dev_err(&pdev->dev, "Failed to save pci state\n");
174 ret = -ENOMEM;
175 goto out_err_free_reg;
176 }
177
178 adf_dbgfs_init(accel_dev);
179
180 ret = adf_dev_up(accel_dev, true);
181 if (ret)
182 goto out_err_dev_stop;
183
184 return ret;
185
186 out_err_dev_stop:
187 adf_dev_down(accel_dev);
188 out_err_free_reg:
189 pci_release_regions(accel_pci_dev->pci_dev);
190 out_err_disable:
191 pci_disable_device(accel_pci_dev->pci_dev);
192 out_err:
193 adf_cleanup_accel(accel_dev);
194 kfree(accel_dev);
195 return ret;
196 }
197
adf_remove(struct pci_dev * pdev)198 static void adf_remove(struct pci_dev *pdev)
199 {
200 struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
201
202 if (!accel_dev) {
203 pr_err("QAT: Driver removal failed\n");
204 return;
205 }
206 adf_dev_down(accel_dev);
207 adf_cleanup_accel(accel_dev);
208 adf_cleanup_pci_dev(accel_dev);
209 kfree(accel_dev);
210 }
211
adf_shutdown(struct pci_dev * pdev)212 static void adf_shutdown(struct pci_dev *pdev)
213 {
214 struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
215
216 adf_dev_down(accel_dev);
217 }
218
219 static const struct pci_device_id adf_pci_tbl[] = {
220 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_C62X) },
221 { }
222 };
223 MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
224
225 static struct pci_driver adf_driver = {
226 .id_table = adf_pci_tbl,
227 .name = ADF_C62X_DEVICE_NAME,
228 .probe = adf_probe,
229 .remove = adf_remove,
230 .shutdown = adf_shutdown,
231 .sriov_configure = adf_sriov_configure,
232 .err_handler = &adf_err_handler,
233 };
234
adfdrv_init(void)235 static int __init adfdrv_init(void)
236 {
237 request_module("intel_qat");
238
239 if (pci_register_driver(&adf_driver)) {
240 pr_err("QAT: Driver initialization failed\n");
241 return -EFAULT;
242 }
243 return 0;
244 }
245
adfdrv_release(void)246 static void __exit adfdrv_release(void)
247 {
248 pci_unregister_driver(&adf_driver);
249 }
250
251 module_init(adfdrv_init);
252 module_exit(adfdrv_release);
253
254 MODULE_LICENSE("Dual BSD/GPL");
255 MODULE_AUTHOR("Intel");
256 MODULE_FIRMWARE(ADF_C62X_FW);
257 MODULE_FIRMWARE(ADF_C62X_MMP);
258 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
259 MODULE_VERSION(ADF_DRV_VERSION);
260 MODULE_IMPORT_NS("CRYPTO_QAT");
261