1 // SPDX-License-Identifier: GPL-2.0
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"
12 * num_vfs_valid - validate VF count
13 * @num_vfs: number of VF(s)
15 static inline bool num_vfs_valid(int num_vfs)
31 static inline enum vf_mode num_vfs_to_mode(int num_vfs)
33 enum vf_mode mode = 0;
37 mode = __NDEV_MODE_PF;
40 mode = __NDEV_MODE_VF16;
43 mode = __NDEV_MODE_VF32;
46 mode = __NDEV_MODE_VF64;
49 mode = __NDEV_MODE_VF128;
56 static inline int vf_mode_to_nr_queues(enum vf_mode mode)
62 nr_queues = MAX_PF_QUEUES;
64 case __NDEV_MODE_VF16:
67 case __NDEV_MODE_VF32:
70 case __NDEV_MODE_VF64:
73 case __NDEV_MODE_VF128:
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);
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)
101 /* allocate resources for PF */
102 err = nitrox_common_sw_init(ndev);
106 err = nitrox_register_interrupts(ndev);
108 nitrox_common_sw_cleanup(ndev);
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)
137 /* register interrupts for PF in SR-IOV */
138 ret = nitrox_sriov_register_interupts(ndev);
142 ret = nitrox_mbox_init(ndev);
144 goto sriov_init_fail;
149 nitrox_sriov_cleanup(ndev);
153 static int nitrox_sriov_enable(struct pci_dev *pdev, int num_vfs)
155 struct nitrox_device *ndev = pci_get_drvdata(pdev);
158 if (!num_vfs_valid(num_vfs)) {
159 dev_err(DEV(ndev), "Invalid num_vfs %d\n", num_vfs);
163 if (pci_num_vf(pdev) == num_vfs)
166 err = pci_enable_sriov(pdev, num_vfs);
168 dev_err(DEV(ndev), "failed to enable PCI sriov %d\n", 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);
187 config_nps_core_vfcfg_mode(ndev, ndev->mode);
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);
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))
208 if (pci_vfs_assigned(pdev)) {
209 dev_warn(DEV(ndev), "VFs are attached to VM. Can't disable SR-IOV\n");
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)
231 return nitrox_sriov_disable(pdev);
233 return nitrox_sriov_enable(pdev, num_vfs);