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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright 2020-21 IBM Corp.
*/
#ifndef _VAS_H
#define _VAS_H
#include <asm/vas.h>
#include <linux/mutex.h>
#include <linux/stringify.h>
/*
* VAS window modify flags
*/
#define VAS_MOD_WIN_CLOSE PPC_BIT(0)
#define VAS_MOD_WIN_JOBS_KILL PPC_BIT(1)
#define VAS_MOD_WIN_DR PPC_BIT(3)
#define VAS_MOD_WIN_PR PPC_BIT(4)
#define VAS_MOD_WIN_SF PPC_BIT(5)
#define VAS_MOD_WIN_TA PPC_BIT(6)
#define VAS_MOD_WIN_FLAGS (VAS_MOD_WIN_JOBS_KILL | VAS_MOD_WIN_DR | \
VAS_MOD_WIN_PR | VAS_MOD_WIN_SF)
#define VAS_WIN_ACTIVE 0x0
#define VAS_WIN_CLOSED 0x1
#define VAS_WIN_INACTIVE 0x2 /* Inactive due to HW failure */
/* Process of being modified, deallocated, or quiesced */
#define VAS_WIN_MOD_IN_PROCESS 0x3
#define VAS_COPY_PASTE_USER_MODE 0x00000001
#define VAS_COP_OP_USER_MODE 0x00000010
#define VAS_GZIP_QOS_CAPABILITIES 0x56516F73477A6970
#define VAS_GZIP_DEFAULT_CAPABILITIES 0x56446566477A6970
enum vas_migrate_action {
VAS_SUSPEND,
VAS_RESUME,
};
/*
* Co-processor feature - GZIP QoS windows or GZIP default windows
*/
enum vas_cop_feat_type {
VAS_GZIP_QOS_FEAT_TYPE,
VAS_GZIP_DEF_FEAT_TYPE,
VAS_MAX_FEAT_TYPE,
};
/*
* Use to get feature specific capabilities from the
* hypervisor.
*/
struct hv_vas_cop_feat_caps {
__be64 descriptor;
u8 win_type; /* Default or QoS type */
u8 user_mode;
__be16 max_lpar_creds;
__be16 max_win_creds;
union {
__be16 reserved;
__be16 def_lpar_creds; /* Used for default capabilities */
};
__be16 target_lpar_creds;
} __packed __aligned(0x1000);
/*
* Feature specific (QoS or default) capabilities.
*/
struct vas_cop_feat_caps {
u64 descriptor;
u8 win_type; /* Default or QoS type */
u8 user_mode; /* User mode copy/paste or COP HCALL */
u16 max_lpar_creds; /* Max credits available in LPAR */
/* Max credits can be assigned per window */
u16 max_win_creds;
union {
u16 reserved; /* Used for QoS credit type */
u16 def_lpar_creds; /* Used for default credit type */
};
/* Total LPAR available credits. Can be different from max LPAR */
/* credits due to DLPAR operation */
atomic_t nr_total_credits; /* Total credits assigned to LPAR */
atomic_t nr_used_credits; /* Used credits so far */
};
/*
* Feature (QoS or Default) specific to store capabilities and
* the list of open windows.
*/
struct vas_caps {
struct vas_cop_feat_caps caps;
struct list_head list; /* List of open windows */
int nr_close_wins; /* closed windows in the hypervisor for DLPAR */
int nr_open_windows; /* Number of successful open windows */
u8 feat; /* Feature type */
};
/*
* To get window information from the hypervisor.
*/
struct hv_vas_win_lpar {
__be16 version;
u8 win_type;
u8 status;
__be16 credits; /* No of credits assigned to this window */
__be16 reserved;
__be32 pid; /* LPAR Process ID */
__be32 tid; /* LPAR Thread ID */
__be64 win_addr; /* Paste address */
__be32 interrupt; /* Interrupt when NX request completes */
__be32 fault; /* Interrupt when NX sees fault */
/* Associativity Domain Identifiers as returned in */
/* H_HOME_NODE_ASSOCIATIVITY */
__be64 domain[6];
__be64 win_util; /* Number of bytes processed */
} __packed __aligned(0x1000);
struct pseries_vas_window {
struct vas_window vas_win;
u64 win_addr; /* Physical paste address */
u8 win_type; /* QoS or Default window */
u32 complete_irq; /* Completion interrupt */
u32 fault_irq; /* Fault interrupt */
u64 domain[6]; /* Associativity domain Ids */
/* this window is allocated */
u64 util;
u32 pid; /* PID associated with this window */
/* List of windows opened which is used for LPM */
struct list_head win_list;
u64 flags;
char *name;
int fault_virq;
atomic_t pending_faults; /* Number of pending faults */
};
int sysfs_add_vas_caps(struct vas_cop_feat_caps *caps);
int vas_reconfig_capabilties(u8 type, int new_nr_creds);
int __init sysfs_pseries_vas_init(struct vas_all_caps *vas_caps);
#ifdef CONFIG_PPC_VAS
int vas_migration_handler(int action);
int pseries_vas_dlpar_cpu(void);
#else
static inline int vas_migration_handler(int action)
{
return 0;
}
static inline int pseries_vas_dlpar_cpu(void)
{
return 0;
}
#endif
#endif /* _VAS_H */
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