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234 lines
4.5 KiB
234 lines
4.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/pci.h> |
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#include <linux/delay.h> |
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#include "nitrox_dev.h" |
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#include "nitrox_hal.h" |
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#include "nitrox_common.h" |
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#include "nitrox_isr.h" |
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#include "nitrox_mbx.h" |
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/** |
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* num_vfs_valid - validate VF count |
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* @num_vfs: number of VF(s) |
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*/ |
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static inline bool num_vfs_valid(int num_vfs) |
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{ |
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bool valid = false; |
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switch (num_vfs) { |
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case 16: |
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case 32: |
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case 64: |
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case 128: |
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valid = true; |
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break; |
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} |
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return valid; |
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} |
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static inline enum vf_mode num_vfs_to_mode(int num_vfs) |
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{ |
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enum vf_mode mode = 0; |
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switch (num_vfs) { |
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case 0: |
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mode = __NDEV_MODE_PF; |
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break; |
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case 16: |
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mode = __NDEV_MODE_VF16; |
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break; |
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case 32: |
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mode = __NDEV_MODE_VF32; |
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break; |
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case 64: |
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mode = __NDEV_MODE_VF64; |
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break; |
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case 128: |
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mode = __NDEV_MODE_VF128; |
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break; |
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} |
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return mode; |
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} |
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static inline int vf_mode_to_nr_queues(enum vf_mode mode) |
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{ |
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int nr_queues = 0; |
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switch (mode) { |
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case __NDEV_MODE_PF: |
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nr_queues = MAX_PF_QUEUES; |
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break; |
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case __NDEV_MODE_VF16: |
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nr_queues = 8; |
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break; |
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case __NDEV_MODE_VF32: |
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nr_queues = 4; |
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break; |
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case __NDEV_MODE_VF64: |
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nr_queues = 2; |
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break; |
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case __NDEV_MODE_VF128: |
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nr_queues = 1; |
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break; |
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} |
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return nr_queues; |
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} |
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static void nitrox_pf_cleanup(struct nitrox_device *ndev) |
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{ |
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/* PF has no queues in SR-IOV mode */ |
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atomic_set(&ndev->state, __NDEV_NOT_READY); |
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/* unregister crypto algorithms */ |
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nitrox_crypto_unregister(); |
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/* cleanup PF resources */ |
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nitrox_unregister_interrupts(ndev); |
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nitrox_common_sw_cleanup(ndev); |
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} |
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/** |
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* nitrox_pf_reinit - re-initialize PF resources once SR-IOV is disabled |
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* @ndev: NITROX device |
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*/ |
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static int nitrox_pf_reinit(struct nitrox_device *ndev) |
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{ |
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int err; |
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/* allocate resources for PF */ |
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err = nitrox_common_sw_init(ndev); |
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if (err) |
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return err; |
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err = nitrox_register_interrupts(ndev); |
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if (err) { |
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nitrox_common_sw_cleanup(ndev); |
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return err; |
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} |
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/* configure the AQM queues */ |
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nitrox_config_aqm_rings(ndev); |
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/* configure the packet queues */ |
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nitrox_config_pkt_input_rings(ndev); |
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nitrox_config_pkt_solicit_ports(ndev); |
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/* set device to ready state */ |
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atomic_set(&ndev->state, __NDEV_READY); |
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/* register crypto algorithms */ |
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return nitrox_crypto_register(); |
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} |
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static void nitrox_sriov_cleanup(struct nitrox_device *ndev) |
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{ |
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/* unregister interrupts for PF in SR-IOV */ |
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nitrox_sriov_unregister_interrupts(ndev); |
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nitrox_mbox_cleanup(ndev); |
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} |
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static int nitrox_sriov_init(struct nitrox_device *ndev) |
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{ |
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int ret; |
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/* register interrupts for PF in SR-IOV */ |
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ret = nitrox_sriov_register_interupts(ndev); |
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if (ret) |
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return ret; |
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ret = nitrox_mbox_init(ndev); |
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if (ret) |
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goto sriov_init_fail; |
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return 0; |
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sriov_init_fail: |
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nitrox_sriov_cleanup(ndev); |
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return ret; |
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} |
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static int nitrox_sriov_enable(struct pci_dev *pdev, int num_vfs) |
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{ |
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struct nitrox_device *ndev = pci_get_drvdata(pdev); |
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int err; |
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if (!num_vfs_valid(num_vfs)) { |
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dev_err(DEV(ndev), "Invalid num_vfs %d\n", num_vfs); |
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return -EINVAL; |
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} |
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if (pci_num_vf(pdev) == num_vfs) |
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return num_vfs; |
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err = pci_enable_sriov(pdev, num_vfs); |
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if (err) { |
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dev_err(DEV(ndev), "failed to enable PCI sriov %d\n", err); |
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return err; |
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} |
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dev_info(DEV(ndev), "Enabled VF(s) %d\n", num_vfs); |
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ndev->mode = num_vfs_to_mode(num_vfs); |
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ndev->iov.num_vfs = num_vfs; |
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ndev->iov.max_vf_queues = vf_mode_to_nr_queues(ndev->mode); |
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/* set bit in flags */ |
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set_bit(__NDEV_SRIOV_BIT, &ndev->flags); |
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/* cleanup PF resources */ |
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nitrox_pf_cleanup(ndev); |
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/* PF SR-IOV mode initialization */ |
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err = nitrox_sriov_init(ndev); |
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if (err) |
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goto iov_fail; |
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config_nps_core_vfcfg_mode(ndev, ndev->mode); |
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return num_vfs; |
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iov_fail: |
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pci_disable_sriov(pdev); |
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/* clear bit in flags */ |
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clear_bit(__NDEV_SRIOV_BIT, &ndev->flags); |
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ndev->iov.num_vfs = 0; |
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ndev->mode = __NDEV_MODE_PF; |
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/* reset back to working mode in PF */ |
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nitrox_pf_reinit(ndev); |
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return err; |
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} |
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static int nitrox_sriov_disable(struct pci_dev *pdev) |
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{ |
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struct nitrox_device *ndev = pci_get_drvdata(pdev); |
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if (!test_bit(__NDEV_SRIOV_BIT, &ndev->flags)) |
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return 0; |
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if (pci_vfs_assigned(pdev)) { |
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dev_warn(DEV(ndev), "VFs are attached to VM. Can't disable SR-IOV\n"); |
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return -EPERM; |
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} |
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pci_disable_sriov(pdev); |
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/* clear bit in flags */ |
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clear_bit(__NDEV_SRIOV_BIT, &ndev->flags); |
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ndev->iov.num_vfs = 0; |
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ndev->iov.max_vf_queues = 0; |
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ndev->mode = __NDEV_MODE_PF; |
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/* cleanup PF SR-IOV resources */ |
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nitrox_sriov_cleanup(ndev); |
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config_nps_core_vfcfg_mode(ndev, ndev->mode); |
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return nitrox_pf_reinit(ndev); |
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} |
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int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs) |
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{ |
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if (!num_vfs) |
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return nitrox_sriov_disable(pdev); |
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return nitrox_sriov_enable(pdev, num_vfs); |
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}
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