| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Private data and functions for adjunct processor VFIO matrix driver. |
| * |
| * Author(s): Tony Krowiak <akrowiak@linux.ibm.com> |
| * Halil Pasic <pasic@linux.ibm.com> |
| * |
| * Copyright IBM Corp. 2018 |
| */ |
| |
| #ifndef _VFIO_AP_PRIVATE_H_ |
| #define _VFIO_AP_PRIVATE_H_ |
| |
| #include <linux/types.h> |
| #include <linux/device.h> |
| #include <linux/mdev.h> |
| #include <linux/delay.h> |
| #include <linux/mutex.h> |
| |
| #include "ap_bus.h" |
| |
| #define VFIO_AP_MODULE_NAME "vfio_ap" |
| #define VFIO_AP_DRV_NAME "vfio_ap" |
| |
| /** |
| * ap_matrix_dev - the AP matrix device structure |
| * @device: generic device structure associated with the AP matrix device |
| * @available_instances: number of mediated matrix devices that can be created |
| * @info: the struct containing the output from the PQAP(QCI) instruction |
| * mdev_list: the list of mediated matrix devices created |
| * lock: mutex for locking the AP matrix device. This lock will be |
| * taken every time we fiddle with state managed by the vfio_ap |
| * driver, be it using @mdev_list or writing the state of a |
| * single ap_matrix_mdev device. It's quite coarse but we don't |
| * expect much contention. |
| */ |
| struct ap_matrix_dev { |
| struct device device; |
| atomic_t available_instances; |
| struct ap_config_info info; |
| struct list_head mdev_list; |
| struct mutex lock; |
| }; |
| |
| extern struct ap_matrix_dev *matrix_dev; |
| |
| /** |
| * The AP matrix is comprised of three bit masks identifying the adapters, |
| * queues (domains) and control domains that belong to an AP matrix. The bits i |
| * each mask, from least significant to most significant bit, correspond to IDs |
| * 0 to 255. When a bit is set, the corresponding ID belongs to the matrix. |
| * |
| * @apm_max: max adapter number in @apm |
| * @apm identifies the AP adapters in the matrix |
| * @aqm_max: max domain number in @aqm |
| * @aqm identifies the AP queues (domains) in the matrix |
| * @adm_max: max domain number in @adm |
| * @adm identifies the AP control domains in the matrix |
| */ |
| struct ap_matrix { |
| unsigned long apm_max; |
| DECLARE_BITMAP(apm, 256); |
| unsigned long aqm_max; |
| DECLARE_BITMAP(aqm, 256); |
| unsigned long adm_max; |
| DECLARE_BITMAP(adm, 256); |
| }; |
| |
| /** |
| * struct ap_matrix_mdev - the mediated matrix device structure |
| * @list: allows the ap_matrix_mdev struct to be added to a list |
| * @matrix: the adapters, usage domains and control domains assigned to the |
| * mediated matrix device. |
| * @group_notifier: notifier block used for specifying callback function for |
| * handling the VFIO_GROUP_NOTIFY_SET_KVM event |
| * @kvm: the struct holding guest's state |
| */ |
| struct ap_matrix_mdev { |
| struct list_head node; |
| struct ap_matrix matrix; |
| struct notifier_block group_notifier; |
| struct kvm *kvm; |
| }; |
| |
| extern int vfio_ap_mdev_register(void); |
| extern void vfio_ap_mdev_unregister(void); |
| |
| #endif /* _VFIO_AP_PRIVATE_H_ */ |