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