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 * struct ap_matrix_dev - Contains the data for the matrix device.
31 * @device: generic device structure associated with the AP matrix device
32 * @available_instances: number of mediated matrix devices that can be created
33 * @info: the struct containing the output from the PQAP(QCI) instruction
34 * @mdev_list: the list of mediated matrix devices created
35 * @lock: mutex for locking the AP matrix device. This lock will be
36 * taken every time we fiddle with state managed by the vfio_ap
37 * driver, be it using @mdev_list or writing the state of a
38 * single ap_matrix_mdev device. It's quite coarse but we don't
39 * expect much contention.
40 * @vfio_ap_drv: the vfio_ap device driver
42 struct ap_matrix_dev {
44 atomic_t available_instances;
45 struct ap_config_info info;
46 struct list_head mdev_list;
48 struct ap_driver *vfio_ap_drv;
51 extern struct ap_matrix_dev *matrix_dev;
54 * struct ap_matrix - matrix of adapters, domains and control domains
56 * @apm_max: max adapter number in @apm
57 * @apm: identifies the AP adapters in the matrix
58 * @aqm_max: max domain number in @aqm
59 * @aqm: identifies the AP queues (domains) in the matrix
60 * @adm_max: max domain number in @adm
61 * @adm: identifies the AP control domains in the matrix
63 * The AP matrix is comprised of three bit masks identifying the adapters,
64 * queues (domains) and control domains that belong to an AP matrix. The bits in
65 * each mask, from left to right, correspond to IDs 0 to 255. When a bit is set
66 * the corresponding ID belongs to the matrix.
69 unsigned long apm_max;
70 DECLARE_BITMAP(apm, 256);
71 unsigned long aqm_max;
72 DECLARE_BITMAP(aqm, 256);
73 unsigned long adm_max;
74 DECLARE_BITMAP(adm, 256);
78 * struct ap_matrix_mdev - Contains the data associated with a matrix mediated
80 * @vdev: the vfio device
81 * @node: allows the ap_matrix_mdev struct to be added to a list
82 * @matrix: the adapters, usage domains and control domains assigned to the
83 * mediated matrix device.
84 * @iommu_notifier: notifier block used for specifying callback function for
85 * handling the VFIO_IOMMU_NOTIFY_DMA_UNMAP even
86 * @kvm: the struct holding guest's state
87 * @pqap_hook: the function pointer to the interception handler for the
88 * PQAP(AQIC) instruction.
89 * @mdev: the mediated device
91 struct ap_matrix_mdev {
92 struct vfio_device vdev;
93 struct list_head node;
94 struct ap_matrix matrix;
95 struct notifier_block iommu_notifier;
97 crypto_hook pqap_hook;
98 struct mdev_device *mdev;
102 * struct vfio_ap_queue - contains the data associated with a queue bound to the
103 * vfio_ap device driver
104 * @matrix_mdev: the matrix mediated device
105 * @saved_pfn: the guest PFN pinned for the guest
106 * @apqn: the APQN of the AP queue device
107 * @saved_isc: the guest ISC registered with the GIB interface
109 struct vfio_ap_queue {
110 struct ap_matrix_mdev *matrix_mdev;
111 unsigned long saved_pfn;
113 #define VFIO_AP_ISC_INVALID 0xff
114 unsigned char saved_isc;
117 int vfio_ap_mdev_register(void);
118 void vfio_ap_mdev_unregister(void);
119 int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q,
122 #endif /* _VFIO_AP_PRIVATE_H_ */