Introduce APIs to handle the execution of device parts admin commands.
These APIs cover functionalities such as mode setting, object creation
and destruction, and operations like parts get/set and metadata
retrieval.
These APIs will be utilized in upcoming patches within this series.
Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxx>
---
drivers/virtio/virtio_pci_common.h | 8 +-
drivers/virtio/virtio_pci_modern.c | 348 +++++++++++++++++++++++++++++
include/linux/virtio_pci_admin.h | 11 +
3 files changed, 366 insertions(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 04b1d17663b3..0d00740cca07 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -173,7 +173,13 @@ struct virtio_device *virtio_pci_vf_get_pf_dev(struct pci_dev *pdev);
#define VIRTIO_DEV_PARTS_ADMIN_CMD_BITMAP \
(BIT_ULL(VIRTIO_ADMIN_CMD_CAP_ID_LIST_QUERY) | \
BIT_ULL(VIRTIO_ADMIN_CMD_DRIVER_CAP_SET) | \
- BIT_ULL(VIRTIO_ADMIN_CMD_DEVICE_CAP_GET))
+ BIT_ULL(VIRTIO_ADMIN_CMD_DEVICE_CAP_GET) | \
+ BIT_ULL(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_CREATE) | \
+ BIT_ULL(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_DESTROY) | \
+ BIT_ULL(VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_GET) | \
+ BIT_ULL(VIRTIO_ADMIN_CMD_DEV_PARTS_GET) | \
+ BIT_ULL(VIRTIO_ADMIN_CMD_DEV_PARTS_SET) | \
+ BIT_ULL(VIRTIO_ADMIN_CMD_DEV_MODE_SET))
/* Unlike modern drivers which support hardware virtio devices, legacy drivers
* assume software-based devices: e.g. they don't use proper memory barriers
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 8ddac2829bc8..3f5aba71cfde 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -15,6 +15,7 @@
*/
#include <linux/delay.h>
+#include <linux/virtio_pci_admin.h>
#define VIRTIO_PCI_NO_LEGACY
#define VIRTIO_RING_NO_LEGACY
#include "virtio_pci_common.h"
@@ -875,6 +876,353 @@ static bool vp_get_shm_region(struct virtio_device *vdev,
return true;
}
+/*
+ * virtio_pci_admin_has_dev_parts - Checks whether the device parts
+ * functionality is supported
+ * @pdev: VF pci_dev
+ *
+ * Returns true on success.
+ */
+bool virtio_pci_admin_has_dev_parts(struct pci_dev *pdev)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ struct virtio_pci_device *vp_dev;
+
+ if (!virtio_dev)
+ return false;
+
+ if (!virtio_has_feature(virtio_dev, VIRTIO_F_ADMIN_VQ))
+ return false;
+
+ vp_dev = to_vp_device(virtio_dev);
+
+ if (!((vp_dev->admin_vq.supported_cmds & VIRTIO_DEV_PARTS_ADMIN_CMD_BITMAP) ==
+ VIRTIO_DEV_PARTS_ADMIN_CMD_BITMAP))
+ return false;
+
+ return vp_dev->admin_vq.max_dev_parts_objects;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_has_dev_parts);
+
+/*
+ * virtio_pci_admin_mode_set - Sets the mode of a member device
+ * @pdev: VF pci_dev
+ * @flags: device mode's flags
+ *
+ * Note: caller must serialize access for the given device.
+ * Returns 0 on success, or negative on failure.
+ */
+int virtio_pci_admin_mode_set(struct pci_dev *pdev, u8 flags)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ struct virtio_admin_cmd_dev_mode_set_data *data;
+ struct virtio_admin_cmd cmd = {};
+ struct scatterlist data_sg;
+ int vf_id;
+ int ret;
+
+ if (!virtio_dev)
+ return -ENODEV;
+
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id < 0)
+ return vf_id;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->flags = flags;
+ sg_init_one(&data_sg, data, sizeof(*data));
+ cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_DEV_MODE_SET);
+ cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV);
+ cmd.group_member_id = cpu_to_le64(vf_id + 1);
+ cmd.data_sg = &data_sg;
+ ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd);
+
+ kfree(data);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_mode_set);
+
+/*
+ * virtio_pci_admin_obj_create - Creates an object for a given type and operation,
+ * following the max objects that can be created for that request.
+ * @pdev: VF pci_dev
+ * @obj_type: Object type
+ * @operation_type: Operation type
+ * @obj_id: Output unique object id
+ *
+ * Note: caller must serialize access for the given device.
+ * Returns 0 on success, or negative on failure.
+ */
+int virtio_pci_admin_obj_create(struct pci_dev *pdev, u16 obj_type, u8 operation_type,
+ u32 *obj_id)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ u16 data_size = sizeof(struct virtio_admin_cmd_resource_obj_create_data);
+ struct virtio_admin_cmd_resource_obj_create_data *obj_create_data;
+ struct virtio_resource_obj_dev_parts obj_dev_parts = {};
+ struct virtio_pci_admin_vq *avq;
+ struct virtio_admin_cmd cmd = {};
+ struct scatterlist data_sg;
+ void *data;
+ int id = -1;
+ int vf_id;
+ int ret;
+
+ if (!virtio_dev)
+ return -ENODEV;
+
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id < 0)
+ return vf_id;
+
+ if (obj_type != VIRTIO_RESOURCE_OBJ_DEV_PARTS)
+ return -EOPNOTSUPP;
+
+ if (operation_type != VIRTIO_RESOURCE_OBJ_DEV_PARTS_TYPE_GET &&
+ operation_type != VIRTIO_RESOURCE_OBJ_DEV_PARTS_TYPE_SET)
+ return -EINVAL;
+
+ avq = &to_vp_device(virtio_dev)->admin_vq;
+ if (!avq->max_dev_parts_objects)
+ return -EOPNOTSUPP;
+
+ id = ida_alloc_range(&avq->dev_parts_ida, 0,
+ avq->max_dev_parts_objects - 1, GFP_KERNEL);
+ if (id < 0)
+ return id;
+
+ *obj_id = id;
+ data_size += sizeof(obj_dev_parts);
+ data = kzalloc(data_size, GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ obj_create_data = data;
+ obj_create_data->hdr.type = cpu_to_le16(obj_type);
+ obj_create_data->hdr.id = cpu_to_le32(*obj_id);
+ obj_dev_parts.type = operation_type;
+ memcpy(obj_create_data->resource_obj_specific_data, &obj_dev_parts,
+ sizeof(obj_dev_parts));
+ sg_init_one(&data_sg, data, data_size);
+ cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_CREATE);
+ cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV);
+ cmd.group_member_id = cpu_to_le64(vf_id + 1);
+ cmd.data_sg = &data_sg;
+ ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd);
+
+ kfree(data);
+end:
+ if (ret)
+ ida_free(&avq->dev_parts_ida, id);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_obj_create);
+
+/*
+ * virtio_pci_admin_obj_destroy - Destroys an object of a given type and id
+ * @pdev: VF pci_dev
+ * @obj_type: Object type
+ * @id: Object id
+ *
+ * Note: caller must serialize access for the given device.
+ * Returns 0 on success, or negative on failure.
+ */
+int virtio_pci_admin_obj_destroy(struct pci_dev *pdev, u16 obj_type, u32 id)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ struct virtio_admin_cmd_resource_obj_cmd_hdr *data;
+ struct virtio_pci_device *vp_dev;
+ struct virtio_admin_cmd cmd = {};
+ struct scatterlist data_sg;
+ int vf_id;
+ int ret;
+
+ if (!virtio_dev)
+ return -ENODEV;
+
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id < 0)
+ return vf_id;
+
+ if (obj_type != VIRTIO_RESOURCE_OBJ_DEV_PARTS)
+ return -EINVAL;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->type = cpu_to_le16(obj_type);
+ data->id = cpu_to_le32(id);
+ sg_init_one(&data_sg, data, sizeof(*data));
+ cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_DESTROY);
+ cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV);
+ cmd.group_member_id = cpu_to_le64(vf_id + 1);
+ cmd.data_sg = &data_sg;
+ ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd);
+ if (!ret) {
+ vp_dev = to_vp_device(virtio_dev);
+ ida_free(&vp_dev->admin_vq.dev_parts_ida, id);
+ }
+
+ kfree(data);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_obj_destroy);
+
+/*
+ * virtio_pci_admin_dev_parts_metadata_get - Gets the metadata of the device parts
+ * identified by the below attributes.
+ * @pdev: VF pci_dev
+ * @obj_type: Object type
+ * @id: Object id
+ * @metadata_type: Metadata type
+ * @out: Upon success holds the output for 'metadata type size'
+ *
+ * Note: caller must serialize access for the given device.
+ * Returns 0 on success, or negative on failure.
+ */
+int virtio_pci_admin_dev_parts_metadata_get(struct pci_dev *pdev, u16 obj_type,
+ u32 id, u8 metadata_type, u32 *out)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ struct virtio_admin_cmd_dev_parts_metadata_result *result;
+ struct virtio_admin_cmd_dev_parts_metadata_data *data;
+ struct scatterlist data_sg, result_sg;
+ struct virtio_admin_cmd cmd = {};
+ int vf_id;
+ int ret;
+
+ if (!virtio_dev)
+ return -ENODEV;
+
+ if (metadata_type != VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_TYPE_SIZE)
+ return -EOPNOTSUPP;
+
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id < 0)
+ return vf_id;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ result = kzalloc(sizeof(*result), GFP_KERNEL);
+ if (!result) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ data->hdr.type = cpu_to_le16(obj_type);
+ data->hdr.id = cpu_to_le32(id);
+ data->type = metadata_type;
+ sg_init_one(&data_sg, data, sizeof(*data));
+ sg_init_one(&result_sg, result, sizeof(*result));
+ cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_GET);
+ cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV);
+ cmd.group_member_id = cpu_to_le64(vf_id + 1);
+ cmd.data_sg = &data_sg;
+ cmd.result_sg = &result_sg;
+ ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd);
+ if (!ret)
+ *out = le32_to_cpu(result->parts_size.size);
+
+ kfree(result);
+end:
+ kfree(data);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_dev_parts_metadata_get);
+
+/*
+ * virtio_pci_admin_dev_parts_get - Gets the device parts identified by the below attributes.
+ * @pdev: VF pci_dev
+ * @obj_type: Object type
+ * @id: Object id
+ * @get_type: Get type
+ * @res_sg: Upon success holds the output result data
+ * @res_size: Upon success holds the output result size
+ *
+ * Note: caller must serialize access for the given device.
+ * Returns 0 on success, or negative on failure.
+ */
+int virtio_pci_admin_dev_parts_get(struct pci_dev *pdev, u16 obj_type, u32 id,
+ u8 get_type, struct scatterlist *res_sg,
+ u32 *res_size)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ struct virtio_admin_cmd_dev_parts_get_data *data;
+ struct scatterlist data_sg;
+ struct virtio_admin_cmd cmd = {};
+ int vf_id;
+ int ret;
+
+ if (!virtio_dev)
+ return -ENODEV;
+
+ if (get_type != VIRTIO_ADMIN_CMD_DEV_PARTS_GET_TYPE_ALL)
+ return -EOPNOTSUPP;
+
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id < 0)
+ return vf_id;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->hdr.type = cpu_to_le16(obj_type);
+ data->hdr.id = cpu_to_le32(id);
+ data->type = get_type;
+ sg_init_one(&data_sg, data, sizeof(*data));
+ cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_DEV_PARTS_GET);
+ cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV);
+ cmd.group_member_id = cpu_to_le64(vf_id + 1);
+ cmd.data_sg = &data_sg;
+ cmd.result_sg = res_sg;
+ ret = vp_modern_admin_cmd_exec(virtio_dev, &cmd);
+ if (!ret)
+ *res_size = cmd.result_sg_size;
+
+ kfree(data);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_dev_parts_get);
+
+/*
+ * virtio_pci_admin_dev_parts_set - Sets the device parts identified by the below attributes.
+ * @pdev: VF pci_dev
+ * @data_sg: The device parts data, its layout follows struct virtio_admin_cmd_dev_parts_set_data
+ *
+ * Note: caller must serialize access for the given device.
+ * Returns 0 on success, or negative on failure.
+ */
+int virtio_pci_admin_dev_parts_set(struct pci_dev *pdev, struct scatterlist *data_sg)
+{
+ struct virtio_device *virtio_dev = virtio_pci_vf_get_pf_dev(pdev);
+ struct virtio_admin_cmd cmd = {};
+ int vf_id;
+
+ if (!virtio_dev)
+ return -ENODEV;
+
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id < 0)
+ return vf_id;
+
+ cmd.opcode = cpu_to_le16(VIRTIO_ADMIN_CMD_DEV_PARTS_SET);
+ cmd.group_type = cpu_to_le16(VIRTIO_ADMIN_GROUP_TYPE_SRIOV);
+ cmd.group_member_id = cpu_to_le64(vf_id + 1);
+ cmd.data_sg = data_sg;
+ return vp_modern_admin_cmd_exec(virtio_dev, &cmd);
+}
+EXPORT_SYMBOL_GPL(virtio_pci_admin_dev_parts_set);
+
static const struct virtio_config_ops virtio_pci_config_nodev_ops = {
.get = NULL,
.set = NULL,
diff --git a/include/linux/virtio_pci_admin.h b/include/linux/virtio_pci_admin.h
index f4a100a0fe2e..dffc92c17ad2 100644
--- a/include/linux/virtio_pci_admin.h
+++ b/include/linux/virtio_pci_admin.h
@@ -20,4 +20,15 @@ int virtio_pci_admin_legacy_io_notify_info(struct pci_dev *pdev,
u64 *bar_offset);
#endif
+bool virtio_pci_admin_has_dev_parts(struct pci_dev *pdev);
+int virtio_pci_admin_mode_set(struct pci_dev *pdev, u8 mode);
+int virtio_pci_admin_obj_create(struct pci_dev *pdev, u16 obj_type, u8 operation_type,
+ u32 *obj_id);
+int virtio_pci_admin_obj_destroy(struct pci_dev *pdev, u16 obj_type, u32 id);
+int virtio_pci_admin_dev_parts_metadata_get(struct pci_dev *pdev, u16 obj_type,
+ u32 id, u8 metadata_type, u32 *out);
+int virtio_pci_admin_dev_parts_get(struct pci_dev *pdev, u16 obj_type, u32 id,
+ u8 get_type, struct scatterlist *res_sg, u32 *res_size);
+int virtio_pci_admin_dev_parts_set(struct pci_dev *pdev, struct scatterlist *data_sg);
+
#endif /* _LINUX_VIRTIO_PCI_ADMIN_H */
--
2.27.0
