This source file includes following definitions.
- num_vfs_valid
- num_vfs_to_mode
- vf_mode_to_nr_queues
- nitrox_pf_cleanup
- nitrox_pf_reinit
- nitrox_sriov_cleanup
- nitrox_sriov_init
- nitrox_sriov_enable
- nitrox_sriov_disable
- nitrox_sriov_configure
1
2 #include <linux/pci.h>
3 #include <linux/delay.h>
4
5 #include "nitrox_dev.h"
6 #include "nitrox_hal.h"
7 #include "nitrox_common.h"
8 #include "nitrox_isr.h"
9 #include "nitrox_mbx.h"
10
11
12
13
14
15 static inline bool num_vfs_valid(int num_vfs)
16 {
17 bool valid = false;
18
19 switch (num_vfs) {
20 case 16:
21 case 32:
22 case 64:
23 case 128:
24 valid = true;
25 break;
26 }
27
28 return valid;
29 }
30
31 static inline enum vf_mode num_vfs_to_mode(int num_vfs)
32 {
33 enum vf_mode mode = 0;
34
35 switch (num_vfs) {
36 case 0:
37 mode = __NDEV_MODE_PF;
38 break;
39 case 16:
40 mode = __NDEV_MODE_VF16;
41 break;
42 case 32:
43 mode = __NDEV_MODE_VF32;
44 break;
45 case 64:
46 mode = __NDEV_MODE_VF64;
47 break;
48 case 128:
49 mode = __NDEV_MODE_VF128;
50 break;
51 }
52
53 return mode;
54 }
55
56 static inline int vf_mode_to_nr_queues(enum vf_mode mode)
57 {
58 int nr_queues = 0;
59
60 switch (mode) {
61 case __NDEV_MODE_PF:
62 nr_queues = MAX_PF_QUEUES;
63 break;
64 case __NDEV_MODE_VF16:
65 nr_queues = 8;
66 break;
67 case __NDEV_MODE_VF32:
68 nr_queues = 4;
69 break;
70 case __NDEV_MODE_VF64:
71 nr_queues = 2;
72 break;
73 case __NDEV_MODE_VF128:
74 nr_queues = 1;
75 break;
76 }
77
78 return nr_queues;
79 }
80
81 static void nitrox_pf_cleanup(struct nitrox_device *ndev)
82 {
83
84 atomic_set(&ndev->state, __NDEV_NOT_READY);
85
86 nitrox_crypto_unregister();
87
88
89 nitrox_unregister_interrupts(ndev);
90 nitrox_common_sw_cleanup(ndev);
91 }
92
93
94
95
96
97 static int nitrox_pf_reinit(struct nitrox_device *ndev)
98 {
99 int err;
100
101
102 err = nitrox_common_sw_init(ndev);
103 if (err)
104 return err;
105
106 err = nitrox_register_interrupts(ndev);
107 if (err) {
108 nitrox_common_sw_cleanup(ndev);
109 return err;
110 }
111
112
113 nitrox_config_aqm_rings(ndev);
114
115
116 nitrox_config_pkt_input_rings(ndev);
117 nitrox_config_pkt_solicit_ports(ndev);
118
119
120 atomic_set(&ndev->state, __NDEV_READY);
121
122
123 return nitrox_crypto_register();
124 }
125
126 static void nitrox_sriov_cleanup(struct nitrox_device *ndev)
127 {
128
129 nitrox_sriov_unregister_interrupts(ndev);
130 nitrox_mbox_cleanup(ndev);
131 }
132
133 static int nitrox_sriov_init(struct nitrox_device *ndev)
134 {
135 int ret;
136
137
138 ret = nitrox_sriov_register_interupts(ndev);
139 if (ret)
140 return ret;
141
142 ret = nitrox_mbox_init(ndev);
143 if (ret)
144 goto sriov_init_fail;
145
146 return 0;
147
148 sriov_init_fail:
149 nitrox_sriov_cleanup(ndev);
150 return ret;
151 }
152
153 static int nitrox_sriov_enable(struct pci_dev *pdev, int num_vfs)
154 {
155 struct nitrox_device *ndev = pci_get_drvdata(pdev);
156 int err;
157
158 if (!num_vfs_valid(num_vfs)) {
159 dev_err(DEV(ndev), "Invalid num_vfs %d\n", num_vfs);
160 return -EINVAL;
161 }
162
163 if (pci_num_vf(pdev) == num_vfs)
164 return num_vfs;
165
166 err = pci_enable_sriov(pdev, num_vfs);
167 if (err) {
168 dev_err(DEV(ndev), "failed to enable PCI sriov %d\n", err);
169 return err;
170 }
171 dev_info(DEV(ndev), "Enabled VF(s) %d\n", num_vfs);
172
173 ndev->mode = num_vfs_to_mode(num_vfs);
174 ndev->iov.num_vfs = num_vfs;
175 ndev->iov.max_vf_queues = vf_mode_to_nr_queues(ndev->mode);
176
177 set_bit(__NDEV_SRIOV_BIT, &ndev->flags);
178
179
180 nitrox_pf_cleanup(ndev);
181
182
183 err = nitrox_sriov_init(ndev);
184 if (err)
185 goto iov_fail;
186
187 config_nps_core_vfcfg_mode(ndev, ndev->mode);
188 return num_vfs;
189
190 iov_fail:
191 pci_disable_sriov(pdev);
192
193 clear_bit(__NDEV_SRIOV_BIT, &ndev->flags);
194 ndev->iov.num_vfs = 0;
195 ndev->mode = __NDEV_MODE_PF;
196
197 nitrox_pf_reinit(ndev);
198 return err;
199 }
200
201 static int nitrox_sriov_disable(struct pci_dev *pdev)
202 {
203 struct nitrox_device *ndev = pci_get_drvdata(pdev);
204
205 if (!test_bit(__NDEV_SRIOV_BIT, &ndev->flags))
206 return 0;
207
208 if (pci_vfs_assigned(pdev)) {
209 dev_warn(DEV(ndev), "VFs are attached to VM. Can't disable SR-IOV\n");
210 return -EPERM;
211 }
212 pci_disable_sriov(pdev);
213
214 clear_bit(__NDEV_SRIOV_BIT, &ndev->flags);
215
216 ndev->iov.num_vfs = 0;
217 ndev->iov.max_vf_queues = 0;
218 ndev->mode = __NDEV_MODE_PF;
219
220
221 nitrox_sriov_cleanup(ndev);
222
223 config_nps_core_vfcfg_mode(ndev, ndev->mode);
224
225 return nitrox_pf_reinit(ndev);
226 }
227
228 int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs)
229 {
230 if (!num_vfs)
231 return nitrox_sriov_disable(pdev);
232
233 return nitrox_sriov_enable(pdev, num_vfs);
234 }