1
2
3#include <linux/workqueue.h>
4#include <linux/pci.h>
5#include <linux/device.h>
6#include <linux/iommu.h>
7#include "adf_common_drv.h"
8#include "adf_cfg.h"
9#include "adf_pf2vf_msg.h"
10
11static struct workqueue_struct *pf2vf_resp_wq;
12
13struct adf_pf2vf_resp {
14 struct work_struct pf2vf_resp_work;
15 struct adf_accel_vf_info *vf_info;
16};
17
18static void adf_iov_send_resp(struct work_struct *work)
19{
20 struct adf_pf2vf_resp *pf2vf_resp =
21 container_of(work, struct adf_pf2vf_resp, pf2vf_resp_work);
22
23 adf_vf2pf_req_hndl(pf2vf_resp->vf_info);
24 kfree(pf2vf_resp);
25}
26
27void adf_schedule_vf2pf_handler(struct adf_accel_vf_info *vf_info)
28{
29 struct adf_pf2vf_resp *pf2vf_resp;
30
31 pf2vf_resp = kzalloc(sizeof(*pf2vf_resp), GFP_ATOMIC);
32 if (!pf2vf_resp)
33 return;
34
35 pf2vf_resp->vf_info = vf_info;
36 INIT_WORK(&pf2vf_resp->pf2vf_resp_work, adf_iov_send_resp);
37 queue_work(pf2vf_resp_wq, &pf2vf_resp->pf2vf_resp_work);
38}
39
40static int adf_enable_sriov(struct adf_accel_dev *accel_dev)
41{
42 struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
43 int totalvfs = pci_sriov_get_totalvfs(pdev);
44 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
45 struct adf_accel_vf_info *vf_info;
46 int i;
47
48 for (i = 0, vf_info = accel_dev->pf.vf_info; i < totalvfs;
49 i++, vf_info++) {
50
51 vf_info->accel_dev = accel_dev;
52 vf_info->vf_nr = i;
53
54 mutex_init(&vf_info->pf2vf_lock);
55 ratelimit_state_init(&vf_info->vf2pf_ratelimit,
56 DEFAULT_RATELIMIT_INTERVAL,
57 DEFAULT_RATELIMIT_BURST);
58 }
59
60
61 if (hw_data->configure_iov_threads)
62 hw_data->configure_iov_threads(accel_dev, true);
63
64
65 if (hw_data->get_pf2vf_offset)
66 adf_enable_vf2pf_interrupts(accel_dev, BIT_ULL(totalvfs) - 1);
67
68
69
70
71
72
73
74 return pci_enable_sriov(pdev, totalvfs);
75}
76
77
78
79
80
81
82
83
84
85void adf_disable_sriov(struct adf_accel_dev *accel_dev)
86{
87 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
88 int totalvfs = pci_sriov_get_totalvfs(accel_to_pci_dev(accel_dev));
89 struct adf_accel_vf_info *vf;
90 int i;
91
92 if (!accel_dev->pf.vf_info)
93 return;
94
95 if (hw_data->get_pf2vf_offset)
96 adf_pf2vf_notify_restarting(accel_dev);
97
98 pci_disable_sriov(accel_to_pci_dev(accel_dev));
99
100
101 if (hw_data->get_pf2vf_offset)
102 adf_disable_vf2pf_interrupts(accel_dev, GENMASK(31, 0));
103
104
105 if (hw_data->configure_iov_threads)
106 hw_data->configure_iov_threads(accel_dev, false);
107
108 for (i = 0, vf = accel_dev->pf.vf_info; i < totalvfs; i++, vf++) {
109 mutex_destroy(&vf->pf2vf_lock);
110 }
111
112 kfree(accel_dev->pf.vf_info);
113 accel_dev->pf.vf_info = NULL;
114}
115EXPORT_SYMBOL_GPL(adf_disable_sriov);
116
117
118
119
120
121
122
123
124
125
126
127
128
129int adf_sriov_configure(struct pci_dev *pdev, int numvfs)
130{
131 struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
132 int totalvfs = pci_sriov_get_totalvfs(pdev);
133 unsigned long val;
134 int ret;
135
136 if (!accel_dev) {
137 dev_err(&pdev->dev, "Failed to find accel_dev\n");
138 return -EFAULT;
139 }
140
141 if (!iommu_present(&pci_bus_type))
142 dev_warn(&pdev->dev, "IOMMU should be enabled for SR-IOV to work correctly\n");
143
144 if (accel_dev->pf.vf_info) {
145 dev_info(&pdev->dev, "Already enabled for this device\n");
146 return -EINVAL;
147 }
148
149 if (adf_dev_started(accel_dev)) {
150 if (adf_devmgr_in_reset(accel_dev) ||
151 adf_dev_in_use(accel_dev)) {
152 dev_err(&GET_DEV(accel_dev), "Device busy\n");
153 return -EBUSY;
154 }
155
156 adf_dev_stop(accel_dev);
157 adf_dev_shutdown(accel_dev);
158 }
159
160 if (adf_cfg_section_add(accel_dev, ADF_KERNEL_SEC))
161 return -EFAULT;
162 val = 0;
163 if (adf_cfg_add_key_value_param(accel_dev, ADF_KERNEL_SEC,
164 ADF_NUM_CY, (void *)&val, ADF_DEC))
165 return -EFAULT;
166
167 set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
168
169
170 accel_dev->pf.vf_info = kcalloc(totalvfs,
171 sizeof(struct adf_accel_vf_info),
172 GFP_KERNEL);
173 if (!accel_dev->pf.vf_info)
174 return -ENOMEM;
175
176 if (adf_dev_init(accel_dev)) {
177 dev_err(&GET_DEV(accel_dev), "Failed to init qat_dev%d\n",
178 accel_dev->accel_id);
179 return -EFAULT;
180 }
181
182 if (adf_dev_start(accel_dev)) {
183 dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
184 accel_dev->accel_id);
185 return -EFAULT;
186 }
187
188 ret = adf_enable_sriov(accel_dev);
189 if (ret)
190 return ret;
191
192 return numvfs;
193}
194EXPORT_SYMBOL_GPL(adf_sriov_configure);
195
196int __init adf_init_pf_wq(void)
197{
198
199 pf2vf_resp_wq = alloc_workqueue("qat_pf2vf_resp_wq", WQ_MEM_RECLAIM, 0);
200
201 return !pf2vf_resp_wq ? -ENOMEM : 0;
202}
203
204void adf_exit_pf_wq(void)
205{
206 if (pf2vf_resp_wq) {
207 destroy_workqueue(pf2vf_resp_wq);
208 pf2vf_resp_wq = NULL;
209 }
210}
211