1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Private data and functions for adjunct processor VFIO matrix driver. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Author(s): Tony Krowiak <akrowiak@linux.ibm.com> 6*4882a593Smuzhiyun * Halil Pasic <pasic@linux.ibm.com> 7*4882a593Smuzhiyun * Pierre Morel <pmorel@linux.ibm.com> 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Copyright IBM Corp. 2018 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef _VFIO_AP_PRIVATE_H_ 13*4882a593Smuzhiyun #define _VFIO_AP_PRIVATE_H_ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <linux/types.h> 16*4882a593Smuzhiyun #include <linux/device.h> 17*4882a593Smuzhiyun #include <linux/mdev.h> 18*4882a593Smuzhiyun #include <linux/delay.h> 19*4882a593Smuzhiyun #include <linux/mutex.h> 20*4882a593Smuzhiyun #include <linux/kvm_host.h> 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #include "ap_bus.h" 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #define VFIO_AP_MODULE_NAME "vfio_ap" 25*4882a593Smuzhiyun #define VFIO_AP_DRV_NAME "vfio_ap" 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /** 28*4882a593Smuzhiyun * ap_matrix_dev - the AP matrix device structure 29*4882a593Smuzhiyun * @device: generic device structure associated with the AP matrix device 30*4882a593Smuzhiyun * @available_instances: number of mediated matrix devices that can be created 31*4882a593Smuzhiyun * @info: the struct containing the output from the PQAP(QCI) instruction 32*4882a593Smuzhiyun * mdev_list: the list of mediated matrix devices created 33*4882a593Smuzhiyun * lock: mutex for locking the AP matrix device. This lock will be 34*4882a593Smuzhiyun * taken every time we fiddle with state managed by the vfio_ap 35*4882a593Smuzhiyun * driver, be it using @mdev_list or writing the state of a 36*4882a593Smuzhiyun * single ap_matrix_mdev device. It's quite coarse but we don't 37*4882a593Smuzhiyun * expect much contention. 38*4882a593Smuzhiyun */ 39*4882a593Smuzhiyun struct ap_matrix_dev { 40*4882a593Smuzhiyun struct device device; 41*4882a593Smuzhiyun atomic_t available_instances; 42*4882a593Smuzhiyun struct ap_config_info info; 43*4882a593Smuzhiyun struct list_head mdev_list; 44*4882a593Smuzhiyun struct mutex lock; 45*4882a593Smuzhiyun struct ap_driver *vfio_ap_drv; 46*4882a593Smuzhiyun }; 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun extern struct ap_matrix_dev *matrix_dev; 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /** 51*4882a593Smuzhiyun * The AP matrix is comprised of three bit masks identifying the adapters, 52*4882a593Smuzhiyun * queues (domains) and control domains that belong to an AP matrix. The bits i 53*4882a593Smuzhiyun * each mask, from least significant to most significant bit, correspond to IDs 54*4882a593Smuzhiyun * 0 to 255. When a bit is set, the corresponding ID belongs to the matrix. 55*4882a593Smuzhiyun * 56*4882a593Smuzhiyun * @apm_max: max adapter number in @apm 57*4882a593Smuzhiyun * @apm identifies the AP adapters in the matrix 58*4882a593Smuzhiyun * @aqm_max: max domain number in @aqm 59*4882a593Smuzhiyun * @aqm identifies the AP queues (domains) in the matrix 60*4882a593Smuzhiyun * @adm_max: max domain number in @adm 61*4882a593Smuzhiyun * @adm identifies the AP control domains in the matrix 62*4882a593Smuzhiyun */ 63*4882a593Smuzhiyun struct ap_matrix { 64*4882a593Smuzhiyun unsigned long apm_max; 65*4882a593Smuzhiyun DECLARE_BITMAP(apm, 256); 66*4882a593Smuzhiyun unsigned long aqm_max; 67*4882a593Smuzhiyun DECLARE_BITMAP(aqm, 256); 68*4882a593Smuzhiyun unsigned long adm_max; 69*4882a593Smuzhiyun DECLARE_BITMAP(adm, 256); 70*4882a593Smuzhiyun }; 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun /** 73*4882a593Smuzhiyun * struct ap_matrix_mdev - the mediated matrix device structure 74*4882a593Smuzhiyun * @list: allows the ap_matrix_mdev struct to be added to a list 75*4882a593Smuzhiyun * @matrix: the adapters, usage domains and control domains assigned to the 76*4882a593Smuzhiyun * mediated matrix device. 77*4882a593Smuzhiyun * @group_notifier: notifier block used for specifying callback function for 78*4882a593Smuzhiyun * handling the VFIO_GROUP_NOTIFY_SET_KVM event 79*4882a593Smuzhiyun * @kvm: the struct holding guest's state 80*4882a593Smuzhiyun */ 81*4882a593Smuzhiyun struct ap_matrix_mdev { 82*4882a593Smuzhiyun struct list_head node; 83*4882a593Smuzhiyun struct ap_matrix matrix; 84*4882a593Smuzhiyun struct notifier_block group_notifier; 85*4882a593Smuzhiyun struct notifier_block iommu_notifier; 86*4882a593Smuzhiyun struct kvm *kvm; 87*4882a593Smuzhiyun struct kvm_s390_module_hook pqap_hook; 88*4882a593Smuzhiyun struct mdev_device *mdev; 89*4882a593Smuzhiyun }; 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun struct vfio_ap_queue { 92*4882a593Smuzhiyun struct ap_matrix_mdev *matrix_mdev; 93*4882a593Smuzhiyun unsigned long saved_pfn; 94*4882a593Smuzhiyun int apqn; 95*4882a593Smuzhiyun #define VFIO_AP_ISC_INVALID 0xff 96*4882a593Smuzhiyun unsigned char saved_isc; 97*4882a593Smuzhiyun }; 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun int vfio_ap_mdev_register(void); 100*4882a593Smuzhiyun void vfio_ap_mdev_unregister(void); 101*4882a593Smuzhiyun int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q, 102*4882a593Smuzhiyun unsigned int retry); 103*4882a593Smuzhiyun 104*4882a593Smuzhiyun #endif /* _VFIO_AP_PRIVATE_H_ */ 105