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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/vdpa/pds/aux_drv.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/vdpa/pds/aux_drv.c')
-rw-r--r--drivers/vdpa/pds/aux_drv.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/vdpa/pds/aux_drv.c b/drivers/vdpa/pds/aux_drv.c
new file mode 100644
index 0000000000..186e9ee22e
--- /dev/null
+++ b/drivers/vdpa/pds/aux_drv.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/auxiliary_bus.h>
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+#include <linux/virtio_pci_modern.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "aux_drv.h"
+#include "debugfs.h"
+#include "vdpa_dev.h"
+
+static const struct auxiliary_device_id pds_vdpa_id_table[] = {
+ { .name = PDS_VDPA_DEV_NAME, },
+ {},
+};
+
+static int pds_vdpa_device_id_check(struct pci_dev *pdev)
+{
+ if (pdev->device != PCI_DEVICE_ID_PENSANDO_VDPA_VF ||
+ pdev->vendor != PCI_VENDOR_ID_PENSANDO)
+ return -ENODEV;
+
+ return PCI_DEVICE_ID_PENSANDO_VDPA_VF;
+}
+
+static int pds_vdpa_probe(struct auxiliary_device *aux_dev,
+ const struct auxiliary_device_id *id)
+
+{
+ struct pds_auxiliary_dev *padev =
+ container_of(aux_dev, struct pds_auxiliary_dev, aux_dev);
+ struct device *dev = &aux_dev->dev;
+ struct pds_vdpa_aux *vdpa_aux;
+ int err;
+
+ vdpa_aux = kzalloc(sizeof(*vdpa_aux), GFP_KERNEL);
+ if (!vdpa_aux)
+ return -ENOMEM;
+
+ vdpa_aux->padev = padev;
+ vdpa_aux->vf_id = pci_iov_vf_id(padev->vf_pdev);
+ auxiliary_set_drvdata(aux_dev, vdpa_aux);
+
+ /* Get device ident info and set up the vdpa_mgmt_dev */
+ err = pds_vdpa_get_mgmt_info(vdpa_aux);
+ if (err)
+ goto err_free_mem;
+
+ /* Find the virtio configuration */
+ vdpa_aux->vd_mdev.pci_dev = padev->vf_pdev;
+ vdpa_aux->vd_mdev.device_id_check = pds_vdpa_device_id_check;
+ vdpa_aux->vd_mdev.dma_mask = DMA_BIT_MASK(PDS_CORE_ADDR_LEN);
+ err = vp_modern_probe(&vdpa_aux->vd_mdev);
+ if (err) {
+ dev_err(dev, "Unable to probe for virtio configuration: %pe\n",
+ ERR_PTR(err));
+ goto err_free_mgmt_info;
+ }
+
+ /* Let vdpa know that we can provide devices */
+ err = vdpa_mgmtdev_register(&vdpa_aux->vdpa_mdev);
+ if (err) {
+ dev_err(dev, "%s: Failed to initialize vdpa_mgmt interface: %pe\n",
+ __func__, ERR_PTR(err));
+ goto err_free_virtio;
+ }
+
+ pds_vdpa_debugfs_add_pcidev(vdpa_aux);
+ pds_vdpa_debugfs_add_ident(vdpa_aux);
+
+ return 0;
+
+err_free_virtio:
+ vp_modern_remove(&vdpa_aux->vd_mdev);
+err_free_mgmt_info:
+ pci_free_irq_vectors(padev->vf_pdev);
+err_free_mem:
+ kfree(vdpa_aux);
+ auxiliary_set_drvdata(aux_dev, NULL);
+
+ return err;
+}
+
+static void pds_vdpa_remove(struct auxiliary_device *aux_dev)
+{
+ struct pds_vdpa_aux *vdpa_aux = auxiliary_get_drvdata(aux_dev);
+ struct device *dev = &aux_dev->dev;
+
+ vdpa_mgmtdev_unregister(&vdpa_aux->vdpa_mdev);
+ vp_modern_remove(&vdpa_aux->vd_mdev);
+ pci_free_irq_vectors(vdpa_aux->padev->vf_pdev);
+
+ pds_vdpa_debugfs_del_vdpadev(vdpa_aux);
+ kfree(vdpa_aux);
+ auxiliary_set_drvdata(aux_dev, NULL);
+
+ dev_info(dev, "Removed\n");
+}
+
+static struct auxiliary_driver pds_vdpa_driver = {
+ .name = PDS_DEV_TYPE_VDPA_STR,
+ .probe = pds_vdpa_probe,
+ .remove = pds_vdpa_remove,
+ .id_table = pds_vdpa_id_table,
+};
+
+static void __exit pds_vdpa_cleanup(void)
+{
+ auxiliary_driver_unregister(&pds_vdpa_driver);
+
+ pds_vdpa_debugfs_destroy();
+}
+module_exit(pds_vdpa_cleanup);
+
+static int __init pds_vdpa_init(void)
+{
+ int err;
+
+ pds_vdpa_debugfs_create();
+
+ err = auxiliary_driver_register(&pds_vdpa_driver);
+ if (err) {
+ pr_err("%s: aux driver register failed: %pe\n",
+ PDS_VDPA_DRV_NAME, ERR_PTR(err));
+ pds_vdpa_debugfs_destroy();
+ }
+
+ return err;
+}
+module_init(pds_vdpa_init);
+
+MODULE_DESCRIPTION(PDS_VDPA_DRV_DESCRIPTION);
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_LICENSE("GPL");