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106 lines
3.2 KiB
106 lines
3.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Private data and functions for adjunct processor VFIO matrix driver. |
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* |
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* Author(s): Tony Krowiak <[email protected]> |
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* Halil Pasic <[email protected]> |
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* Pierre Morel <[email protected]> |
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* |
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* Copyright IBM Corp. 2018 |
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*/ |
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#ifndef _VFIO_AP_PRIVATE_H_ |
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#define _VFIO_AP_PRIVATE_H_ |
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#include <linux/types.h> |
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#include <linux/device.h> |
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#include <linux/mdev.h> |
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#include <linux/delay.h> |
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#include <linux/mutex.h> |
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#include <linux/kvm_host.h> |
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#include "ap_bus.h" |
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#define VFIO_AP_MODULE_NAME "vfio_ap" |
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#define VFIO_AP_DRV_NAME "vfio_ap" |
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/** |
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* ap_matrix_dev - the AP matrix device structure |
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* @device: generic device structure associated with the AP matrix device |
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* @available_instances: number of mediated matrix devices that can be created |
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* @info: the struct containing the output from the PQAP(QCI) instruction |
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* mdev_list: the list of mediated matrix devices created |
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* lock: mutex for locking the AP matrix device. This lock will be |
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* taken every time we fiddle with state managed by the vfio_ap |
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* driver, be it using @mdev_list or writing the state of a |
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* single ap_matrix_mdev device. It's quite coarse but we don't |
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* expect much contention. |
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*/ |
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struct ap_matrix_dev { |
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struct device device; |
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atomic_t available_instances; |
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struct ap_config_info info; |
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struct list_head mdev_list; |
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struct mutex lock; |
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struct ap_driver *vfio_ap_drv; |
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}; |
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extern struct ap_matrix_dev *matrix_dev; |
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/** |
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* The AP matrix is comprised of three bit masks identifying the adapters, |
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* queues (domains) and control domains that belong to an AP matrix. The bits i |
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* each mask, from least significant to most significant bit, correspond to IDs |
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* 0 to 255. When a bit is set, the corresponding ID belongs to the matrix. |
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* |
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* @apm_max: max adapter number in @apm |
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* @apm identifies the AP adapters in the matrix |
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* @aqm_max: max domain number in @aqm |
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* @aqm identifies the AP queues (domains) in the matrix |
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* @adm_max: max domain number in @adm |
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* @adm identifies the AP control domains in the matrix |
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*/ |
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struct ap_matrix { |
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unsigned long apm_max; |
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DECLARE_BITMAP(apm, 256); |
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unsigned long aqm_max; |
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DECLARE_BITMAP(aqm, 256); |
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unsigned long adm_max; |
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DECLARE_BITMAP(adm, 256); |
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}; |
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/** |
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* struct ap_matrix_mdev - the mediated matrix device structure |
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* @list: allows the ap_matrix_mdev struct to be added to a list |
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* @matrix: the adapters, usage domains and control domains assigned to the |
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* mediated matrix device. |
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* @group_notifier: notifier block used for specifying callback function for |
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* handling the VFIO_GROUP_NOTIFY_SET_KVM event |
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* @kvm: the struct holding guest's state |
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*/ |
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struct ap_matrix_mdev { |
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struct list_head node; |
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struct ap_matrix matrix; |
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struct notifier_block group_notifier; |
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struct notifier_block iommu_notifier; |
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bool kvm_busy; |
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wait_queue_head_t wait_for_kvm; |
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struct kvm *kvm; |
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struct kvm_s390_module_hook pqap_hook; |
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struct mdev_device *mdev; |
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}; |
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struct vfio_ap_queue { |
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struct ap_matrix_mdev *matrix_mdev; |
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unsigned long saved_pfn; |
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int apqn; |
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#define VFIO_AP_ISC_INVALID 0xff |
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unsigned char saved_isc; |
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}; |
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int vfio_ap_mdev_register(void); |
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void vfio_ap_mdev_unregister(void); |
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int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q, |
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unsigned int retry); |
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#endif /* _VFIO_AP_PRIVATE_H_ */
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