1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright 2020-21 IBM Corp.
9 #include <linux/mutex.h>
10 #include <linux/stringify.h>
13 * VAS window modify flags
15 #define VAS_MOD_WIN_CLOSE PPC_BIT(0)
16 #define VAS_MOD_WIN_JOBS_KILL PPC_BIT(1)
17 #define VAS_MOD_WIN_DR PPC_BIT(3)
18 #define VAS_MOD_WIN_PR PPC_BIT(4)
19 #define VAS_MOD_WIN_SF PPC_BIT(5)
20 #define VAS_MOD_WIN_TA PPC_BIT(6)
21 #define VAS_MOD_WIN_FLAGS (VAS_MOD_WIN_JOBS_KILL | VAS_MOD_WIN_DR | \
22 VAS_MOD_WIN_PR | VAS_MOD_WIN_SF)
24 #define VAS_WIN_ACTIVE 0x0
25 #define VAS_WIN_CLOSED 0x1
26 #define VAS_WIN_INACTIVE 0x2 /* Inactive due to HW failure */
27 /* Process of being modified, deallocated, or quiesced */
28 #define VAS_WIN_MOD_IN_PROCESS 0x3
30 #define VAS_COPY_PASTE_USER_MODE 0x00000001
31 #define VAS_COP_OP_USER_MODE 0x00000010
33 #define VAS_GZIP_QOS_CAPABILITIES 0x56516F73477A6970
34 #define VAS_GZIP_DEFAULT_CAPABILITIES 0x56446566477A6970
36 enum vas_migrate_action {
42 * Co-processor feature - GZIP QoS windows or GZIP default windows
44 enum vas_cop_feat_type {
45 VAS_GZIP_QOS_FEAT_TYPE,
46 VAS_GZIP_DEF_FEAT_TYPE,
51 * Use to get feature specific capabilities from the
54 struct hv_vas_cop_feat_caps {
56 u8 win_type; /* Default or QoS type */
58 __be16 max_lpar_creds;
62 __be16 def_lpar_creds; /* Used for default capabilities */
64 __be16 target_lpar_creds;
65 } __packed __aligned(0x1000);
68 * Feature specific (QoS or default) capabilities.
70 struct vas_cop_feat_caps {
72 u8 win_type; /* Default or QoS type */
73 u8 user_mode; /* User mode copy/paste or COP HCALL */
74 u16 max_lpar_creds; /* Max credits available in LPAR */
75 /* Max credits can be assigned per window */
78 u16 reserved; /* Used for QoS credit type */
79 u16 def_lpar_creds; /* Used for default credit type */
81 /* Total LPAR available credits. Can be different from max LPAR */
82 /* credits due to DLPAR operation */
83 atomic_t nr_total_credits; /* Total credits assigned to LPAR */
84 atomic_t nr_used_credits; /* Used credits so far */
88 * Feature (QoS or Default) specific to store capabilities and
89 * the list of open windows.
92 struct vas_cop_feat_caps caps;
93 struct list_head list; /* List of open windows */
94 int nr_close_wins; /* closed windows in the hypervisor for DLPAR */
95 int nr_open_windows; /* Number of successful open windows */
96 u8 feat; /* Feature type */
100 * To get window information from the hypervisor.
102 struct hv_vas_win_lpar {
106 __be16 credits; /* No of credits assigned to this window */
108 __be32 pid; /* LPAR Process ID */
109 __be32 tid; /* LPAR Thread ID */
110 __be64 win_addr; /* Paste address */
111 __be32 interrupt; /* Interrupt when NX request completes */
112 __be32 fault; /* Interrupt when NX sees fault */
113 /* Associativity Domain Identifiers as returned in */
114 /* H_HOME_NODE_ASSOCIATIVITY */
116 __be64 win_util; /* Number of bytes processed */
117 } __packed __aligned(0x1000);
119 struct pseries_vas_window {
120 struct vas_window vas_win;
121 u64 win_addr; /* Physical paste address */
122 u8 win_type; /* QoS or Default window */
123 u32 complete_irq; /* Completion interrupt */
124 u32 fault_irq; /* Fault interrupt */
125 u64 domain[6]; /* Associativity domain Ids */
126 /* this window is allocated */
128 u32 pid; /* PID associated with this window */
130 /* List of windows opened which is used for LPM */
131 struct list_head win_list;
137 int sysfs_add_vas_caps(struct vas_cop_feat_caps *caps);
138 int vas_reconfig_capabilties(u8 type, int new_nr_creds);
139 int __init sysfs_pseries_vas_init(struct vas_all_caps *vas_caps);
141 #ifdef CONFIG_PPC_VAS
142 int vas_migration_handler(int action);
144 static inline int vas_migration_handler(int action)