gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / crypto / cavium / nitrox / nitrox_sriov.c
blob43287f8471d1d6b83aa12678ee01ac323d4c8e95
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/pci.h>
3 #include <linux/delay.h>
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"
11 /**
12 * num_vfs_valid - validate VF count
13 * @num_vfs: number of VF(s)
15 static inline bool num_vfs_valid(int num_vfs)
17 bool valid = false;
19 switch (num_vfs) {
20 case 16:
21 case 32:
22 case 64:
23 case 128:
24 valid = true;
25 break;
28 return valid;
31 static inline enum vf_mode num_vfs_to_mode(int num_vfs)
33 enum vf_mode mode = 0;
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;
53 return mode;
56 static inline int vf_mode_to_nr_queues(enum vf_mode mode)
58 int nr_queues = 0;
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;
78 return nr_queues;
81 static void nitrox_pf_cleanup(struct nitrox_device *ndev)
83 /* PF has no queues in SR-IOV mode */
84 atomic_set(&ndev->state, __NDEV_NOT_READY);
85 /* unregister crypto algorithms */
86 nitrox_crypto_unregister();
88 /* cleanup PF resources */
89 nitrox_unregister_interrupts(ndev);
90 nitrox_common_sw_cleanup(ndev);
93 /**
94 * nitrox_pf_reinit - re-initialize PF resources once SR-IOV is disabled
95 * @ndev: NITROX device
97 static int nitrox_pf_reinit(struct nitrox_device *ndev)
99 int err;
101 /* allocate resources for PF */
102 err = nitrox_common_sw_init(ndev);
103 if (err)
104 return err;
106 err = nitrox_register_interrupts(ndev);
107 if (err) {
108 nitrox_common_sw_cleanup(ndev);
109 return err;
112 /* configure the AQM queues */
113 nitrox_config_aqm_rings(ndev);
115 /* configure the packet queues */
116 nitrox_config_pkt_input_rings(ndev);
117 nitrox_config_pkt_solicit_ports(ndev);
119 /* set device to ready state */
120 atomic_set(&ndev->state, __NDEV_READY);
122 /* register crypto algorithms */
123 return nitrox_crypto_register();
126 static void nitrox_sriov_cleanup(struct nitrox_device *ndev)
128 /* unregister interrupts for PF in SR-IOV */
129 nitrox_sriov_unregister_interrupts(ndev);
130 nitrox_mbox_cleanup(ndev);
133 static int nitrox_sriov_init(struct nitrox_device *ndev)
135 int ret;
137 /* register interrupts for PF in SR-IOV */
138 ret = nitrox_sriov_register_interupts(ndev);
139 if (ret)
140 return ret;
142 ret = nitrox_mbox_init(ndev);
143 if (ret)
144 goto sriov_init_fail;
146 return 0;
148 sriov_init_fail:
149 nitrox_sriov_cleanup(ndev);
150 return ret;
153 static int nitrox_sriov_enable(struct pci_dev *pdev, int num_vfs)
155 struct nitrox_device *ndev = pci_get_drvdata(pdev);
156 int err;
158 if (!num_vfs_valid(num_vfs)) {
159 dev_err(DEV(ndev), "Invalid num_vfs %d\n", num_vfs);
160 return -EINVAL;
163 if (pci_num_vf(pdev) == num_vfs)
164 return num_vfs;
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;
171 dev_info(DEV(ndev), "Enabled VF(s) %d\n", num_vfs);
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 /* set bit in flags */
177 set_bit(__NDEV_SRIOV_BIT, &ndev->flags);
179 /* cleanup PF resources */
180 nitrox_pf_cleanup(ndev);
182 /* PF SR-IOV mode initialization */
183 err = nitrox_sriov_init(ndev);
184 if (err)
185 goto iov_fail;
187 config_nps_core_vfcfg_mode(ndev, ndev->mode);
188 return num_vfs;
190 iov_fail:
191 pci_disable_sriov(pdev);
192 /* clear bit in flags */
193 clear_bit(__NDEV_SRIOV_BIT, &ndev->flags);
194 ndev->iov.num_vfs = 0;
195 ndev->mode = __NDEV_MODE_PF;
196 /* reset back to working mode in PF */
197 nitrox_pf_reinit(ndev);
198 return err;
201 static int nitrox_sriov_disable(struct pci_dev *pdev)
203 struct nitrox_device *ndev = pci_get_drvdata(pdev);
205 if (!test_bit(__NDEV_SRIOV_BIT, &ndev->flags))
206 return 0;
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;
212 pci_disable_sriov(pdev);
213 /* clear bit in flags */
214 clear_bit(__NDEV_SRIOV_BIT, &ndev->flags);
216 ndev->iov.num_vfs = 0;
217 ndev->iov.max_vf_queues = 0;
218 ndev->mode = __NDEV_MODE_PF;
220 /* cleanup PF SR-IOV resources */
221 nitrox_sriov_cleanup(ndev);
223 config_nps_core_vfcfg_mode(ndev, ndev->mode);
225 return nitrox_pf_reinit(ndev);
228 int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs)
230 if (!num_vfs)
231 return nitrox_sriov_disable(pdev);
233 return nitrox_sriov_enable(pdev, num_vfs);