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