diff options
Diffstat (limited to 'drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c')
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c index 9a9ab8cb2cb3..448d7b23b2f7 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c @@ -104,10 +104,112 @@ void ionic_bus_unmap_dbpage(struct ionic *ionic, void __iomem *page) iounmap(page); } +static void ionic_vf_dealloc_locked(struct ionic *ionic) +{ + struct ionic_vf *v; + dma_addr_t dma = 0; + int i; + + if (!ionic->vfs) + return; + + for (i = ionic->num_vfs - 1; i >= 0; i--) { + v = &ionic->vfs[i]; + + if (v->stats_pa) { + (void)ionic_set_vf_config(ionic, i, + IONIC_VF_ATTR_STATSADDR, + (u8 *)&dma); + dma_unmap_single(ionic->dev, v->stats_pa, + sizeof(v->stats), DMA_FROM_DEVICE); + v->stats_pa = 0; + } + } + + kfree(ionic->vfs); + ionic->vfs = NULL; + ionic->num_vfs = 0; +} + +static void ionic_vf_dealloc(struct ionic *ionic) +{ + down_write(&ionic->vf_op_lock); + ionic_vf_dealloc_locked(ionic); + up_write(&ionic->vf_op_lock); +} + +static int ionic_vf_alloc(struct ionic *ionic, int num_vfs) +{ + struct ionic_vf *v; + int err = 0; + int i; + + down_write(&ionic->vf_op_lock); + + ionic->vfs = kcalloc(num_vfs, sizeof(struct ionic_vf), GFP_KERNEL); + if (!ionic->vfs) { + err = -ENOMEM; + goto out; + } + + for (i = 0; i < num_vfs; i++) { + v = &ionic->vfs[i]; + v->stats_pa = dma_map_single(ionic->dev, &v->stats, + sizeof(v->stats), DMA_FROM_DEVICE); + if (dma_mapping_error(ionic->dev, v->stats_pa)) { + v->stats_pa = 0; + err = -ENODEV; + goto out; + } + + /* ignore failures from older FW, we just won't get stats */ + (void)ionic_set_vf_config(ionic, i, IONIC_VF_ATTR_STATSADDR, + (u8 *)&v->stats_pa); + ionic->num_vfs++; + } + +out: + if (err) + ionic_vf_dealloc_locked(ionic); + up_write(&ionic->vf_op_lock); + return err; +} + +static int ionic_sriov_configure(struct pci_dev *pdev, int num_vfs) +{ + struct ionic *ionic = pci_get_drvdata(pdev); + struct device *dev = ionic->dev; + int ret = 0; + + if (num_vfs > 0) { + ret = pci_enable_sriov(pdev, num_vfs); + if (ret) { + dev_err(dev, "Cannot enable SRIOV: %d\n", ret); + goto out; + } + + ret = ionic_vf_alloc(ionic, num_vfs); + if (ret) { + dev_err(dev, "Cannot alloc VFs: %d\n", ret); + pci_disable_sriov(pdev); + goto out; + } + + ret = num_vfs; + } else { + pci_disable_sriov(pdev); + ionic_vf_dealloc(ionic); + } + +out: + return ret; +} + static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct device *dev = &pdev->dev; struct ionic *ionic; + int num_vfs; int err; ionic = ionic_devlink_alloc(dev); @@ -206,6 +308,15 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_free_lifs; } + init_rwsem(&ionic->vf_op_lock); + num_vfs = pci_num_vf(pdev); + if (num_vfs) { + dev_info(dev, "%d VFs found already enabled\n", num_vfs); + err = ionic_vf_alloc(ionic, num_vfs); + if (err) + dev_err(dev, "Cannot enable existing VFs: %d\n", err); + } + err = ionic_lifs_register(ionic); if (err) { dev_err(dev, "Cannot register LIFs: %d, aborting\n", err); @@ -223,6 +334,7 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) err_out_deregister_lifs: ionic_lifs_unregister(ionic); err_out_deinit_lifs: + ionic_vf_dealloc(ionic); ionic_lifs_deinit(ionic); err_out_free_lifs: ionic_lifs_free(ionic); @@ -279,6 +391,7 @@ static struct pci_driver ionic_driver = { .id_table = ionic_id_table, .probe = ionic_probe, .remove = ionic_remove, + .sriov_configure = ionic_sriov_configure, }; int ionic_bus_register_driver(void) |