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151cc834f3
This is the vDPA device support, where we advertise that we can support the virtio queues and deal with the configuration work through the pds_core's adminq. Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Message-Id: <20230519215632.12343-10-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright(c) 2023 Advanced Micro Devices, Inc */
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#include <linux/auxiliary_bus.h>
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#include <linux/pci.h>
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#include <linux/vdpa.h>
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#include <linux/virtio_pci_modern.h>
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#include <linux/pds/pds_common.h>
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#include <linux/pds/pds_core_if.h>
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#include <linux/pds/pds_adminq.h>
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#include <linux/pds/pds_auxbus.h>
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#include "aux_drv.h"
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#include "debugfs.h"
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#include "vdpa_dev.h"
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static const struct auxiliary_device_id pds_vdpa_id_table[] = {
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{ .name = PDS_VDPA_DEV_NAME, },
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{},
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};
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static int pds_vdpa_device_id_check(struct pci_dev *pdev)
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{
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if (pdev->device != PCI_DEVICE_ID_PENSANDO_VDPA_VF ||
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pdev->vendor != PCI_VENDOR_ID_PENSANDO)
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return -ENODEV;
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return PCI_DEVICE_ID_PENSANDO_VDPA_VF;
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}
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static int pds_vdpa_probe(struct auxiliary_device *aux_dev,
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const struct auxiliary_device_id *id)
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{
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struct pds_auxiliary_dev *padev =
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container_of(aux_dev, struct pds_auxiliary_dev, aux_dev);
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struct device *dev = &aux_dev->dev;
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struct pds_vdpa_aux *vdpa_aux;
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int err;
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vdpa_aux = kzalloc(sizeof(*vdpa_aux), GFP_KERNEL);
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if (!vdpa_aux)
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return -ENOMEM;
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vdpa_aux->padev = padev;
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vdpa_aux->vf_id = pci_iov_vf_id(padev->vf_pdev);
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auxiliary_set_drvdata(aux_dev, vdpa_aux);
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/* Get device ident info and set up the vdpa_mgmt_dev */
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err = pds_vdpa_get_mgmt_info(vdpa_aux);
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if (err)
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goto err_free_mem;
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/* Find the virtio configuration */
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vdpa_aux->vd_mdev.pci_dev = padev->vf_pdev;
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vdpa_aux->vd_mdev.device_id_check = pds_vdpa_device_id_check;
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vdpa_aux->vd_mdev.dma_mask = DMA_BIT_MASK(PDS_CORE_ADDR_LEN);
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err = vp_modern_probe(&vdpa_aux->vd_mdev);
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if (err) {
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dev_err(dev, "Unable to probe for virtio configuration: %pe\n",
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ERR_PTR(err));
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goto err_free_mgmt_info;
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}
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/* Let vdpa know that we can provide devices */
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err = vdpa_mgmtdev_register(&vdpa_aux->vdpa_mdev);
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if (err) {
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dev_err(dev, "%s: Failed to initialize vdpa_mgmt interface: %pe\n",
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__func__, ERR_PTR(err));
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goto err_free_virtio;
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}
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pds_vdpa_debugfs_add_pcidev(vdpa_aux);
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pds_vdpa_debugfs_add_ident(vdpa_aux);
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return 0;
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err_free_virtio:
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vp_modern_remove(&vdpa_aux->vd_mdev);
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err_free_mgmt_info:
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pci_free_irq_vectors(padev->vf_pdev);
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err_free_mem:
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kfree(vdpa_aux);
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auxiliary_set_drvdata(aux_dev, NULL);
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return err;
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}
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static void pds_vdpa_remove(struct auxiliary_device *aux_dev)
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{
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struct pds_vdpa_aux *vdpa_aux = auxiliary_get_drvdata(aux_dev);
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struct device *dev = &aux_dev->dev;
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vdpa_mgmtdev_unregister(&vdpa_aux->vdpa_mdev);
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vp_modern_remove(&vdpa_aux->vd_mdev);
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pci_free_irq_vectors(vdpa_aux->padev->vf_pdev);
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pds_vdpa_debugfs_del_vdpadev(vdpa_aux);
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kfree(vdpa_aux);
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auxiliary_set_drvdata(aux_dev, NULL);
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dev_info(dev, "Removed\n");
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}
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static struct auxiliary_driver pds_vdpa_driver = {
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.name = PDS_DEV_TYPE_VDPA_STR,
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.probe = pds_vdpa_probe,
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.remove = pds_vdpa_remove,
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.id_table = pds_vdpa_id_table,
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};
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static void __exit pds_vdpa_cleanup(void)
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{
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auxiliary_driver_unregister(&pds_vdpa_driver);
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pds_vdpa_debugfs_destroy();
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}
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module_exit(pds_vdpa_cleanup);
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static int __init pds_vdpa_init(void)
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{
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int err;
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pds_vdpa_debugfs_create();
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err = auxiliary_driver_register(&pds_vdpa_driver);
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if (err) {
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pr_err("%s: aux driver register failed: %pe\n",
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PDS_VDPA_DRV_NAME, ERR_PTR(err));
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pds_vdpa_debugfs_destroy();
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}
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return err;
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}
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module_init(pds_vdpa_init);
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MODULE_DESCRIPTION(PDS_VDPA_DRV_DESCRIPTION);
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MODULE_AUTHOR("Advanced Micro Devices, Inc");
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MODULE_LICENSE("GPL");
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