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1fde5734 TK |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* | |
3 | * Private data and functions for adjunct processor VFIO matrix driver. | |
4 | * | |
5 | * Author(s): Tony Krowiak <akrowiak@linux.ibm.com> | |
65f06713 | 6 | * Halil Pasic <pasic@linux.ibm.com> |
ec89b55e | 7 | * Pierre Morel <pmorel@linux.ibm.com> |
1fde5734 TK |
8 | * |
9 | * Copyright IBM Corp. 2018 | |
10 | */ | |
11 | ||
12 | #ifndef _VFIO_AP_PRIVATE_H_ | |
13 | #define _VFIO_AP_PRIVATE_H_ | |
14 | ||
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> | |
e5282de9 | 20 | #include <linux/kvm_host.h> |
eb0feefd | 21 | #include <linux/vfio.h> |
1fde5734 TK |
22 | |
23 | #include "ap_bus.h" | |
24 | ||
25 | #define VFIO_AP_MODULE_NAME "vfio_ap" | |
26 | #define VFIO_AP_DRV_NAME "vfio_ap" | |
27 | ||
28 | /** | |
5ef4f710 TK |
29 | * struct ap_matrix_dev - Contains the data for the matrix device. |
30 | * | |
1fde5734 | 31 | * @device: generic device structure associated with the AP matrix device |
65f06713 TK |
32 | * @available_instances: number of mediated matrix devices that can be created |
33 | * @info: the struct containing the output from the PQAP(QCI) instruction | |
5ef4f710 TK |
34 | * @mdev_list: the list of mediated matrix devices created |
35 | * @lock: mutex for locking the AP matrix device. This lock will be | |
65f06713 TK |
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. | |
5ef4f710 | 40 | * @vfio_ap_drv: the vfio_ap device driver |
1fde5734 TK |
41 | */ |
42 | struct ap_matrix_dev { | |
43 | struct device device; | |
65f06713 TK |
44 | atomic_t available_instances; |
45 | struct ap_config_info info; | |
46 | struct list_head mdev_list; | |
47 | struct mutex lock; | |
36360658 | 48 | struct ap_driver *vfio_ap_drv; |
1fde5734 TK |
49 | }; |
50 | ||
51 | extern struct ap_matrix_dev *matrix_dev; | |
52 | ||
65f06713 | 53 | /** |
5ef4f710 | 54 | * struct ap_matrix - matrix of adapters, domains and control domains |
65f06713 TK |
55 | * |
56 | * @apm_max: max adapter number in @apm | |
5ef4f710 | 57 | * @apm: identifies the AP adapters in the matrix |
65f06713 | 58 | * @aqm_max: max domain number in @aqm |
5ef4f710 | 59 | * @aqm: identifies the AP queues (domains) in the matrix |
65f06713 | 60 | * @adm_max: max domain number in @adm |
5ef4f710 TK |
61 | * @adm: identifies the AP control domains in the matrix |
62 | * | |
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. | |
65f06713 TK |
67 | */ |
68 | struct ap_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); | |
75 | }; | |
76 | ||
77 | /** | |
5ef4f710 TK |
78 | * struct ap_matrix_mdev - Contains the data associated with a matrix mediated |
79 | * device. | |
80 | * @vdev: the vfio device | |
81 | * @node: allows the ap_matrix_mdev struct to be added to a list | |
65f06713 TK |
82 | * @matrix: the adapters, usage domains and control domains assigned to the |
83 | * mediated matrix device. | |
258287c9 | 84 | * @kvm: the struct holding guest's state |
5ef4f710 TK |
85 | * @pqap_hook: the function pointer to the interception handler for the |
86 | * PQAP(AQIC) instruction. | |
87 | * @mdev: the mediated device | |
65f06713 TK |
88 | */ |
89 | struct ap_matrix_mdev { | |
eb0feefd | 90 | struct vfio_device vdev; |
65f06713 TK |
91 | struct list_head node; |
92 | struct ap_matrix matrix; | |
258287c9 | 93 | struct kvm *kvm; |
1e753732 | 94 | crypto_hook pqap_hook; |
62e358ce | 95 | struct mdev_device *mdev; |
65f06713 TK |
96 | }; |
97 | ||
5ef4f710 TK |
98 | /** |
99 | * struct vfio_ap_queue - contains the data associated with a queue bound to the | |
100 | * vfio_ap device driver | |
101 | * @matrix_mdev: the matrix mediated device | |
102 | * @saved_pfn: the guest PFN pinned for the guest | |
103 | * @apqn: the APQN of the AP queue device | |
104 | * @saved_isc: the guest ISC registered with the GIB interface | |
105 | */ | |
ec89b55e PM |
106 | struct vfio_ap_queue { |
107 | struct ap_matrix_mdev *matrix_mdev; | |
108 | unsigned long saved_pfn; | |
109 | int apqn; | |
110 | #define VFIO_AP_ISC_INVALID 0xff | |
111 | unsigned char saved_isc; | |
112 | }; | |
6c12a638 TK |
113 | |
114 | int vfio_ap_mdev_register(void); | |
115 | void vfio_ap_mdev_unregister(void); | |
116 | int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q, | |
117 | unsigned int retry); | |
118 | ||
1fde5734 | 119 | #endif /* _VFIO_AP_PRIVATE_H_ */ |