1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright 2020-21 IBM Corp. 4 */ 5 6 #ifndef _VAS_H 7 #define _VAS_H 8 #include <asm/vas.h> 9 #include <linux/mutex.h> 10 #include <linux/stringify.h> 11 12 /* 13 * VAS window modify flags 14 */ 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) 23 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 29 30 #define VAS_COPY_PASTE_USER_MODE 0x00000001 31 #define VAS_COP_OP_USER_MODE 0x00000010 32 33 #define VAS_GZIP_QOS_CAPABILITIES 0x56516F73477A6970 34 #define VAS_GZIP_DEFAULT_CAPABILITIES 0x56446566477A6970 35 36 enum vas_migrate_action { 37 VAS_SUSPEND, 38 VAS_RESUME, 39 }; 40 41 /* 42 * Co-processor feature - GZIP QoS windows or GZIP default windows 43 */ 44 enum vas_cop_feat_type { 45 VAS_GZIP_QOS_FEAT_TYPE, 46 VAS_GZIP_DEF_FEAT_TYPE, 47 VAS_MAX_FEAT_TYPE, 48 }; 49 50 /* 51 * Use to get feature specific capabilities from the 52 * hypervisor. 53 */ 54 struct hv_vas_cop_feat_caps { 55 __be64 descriptor; 56 u8 win_type; /* Default or QoS type */ 57 u8 user_mode; 58 __be16 max_lpar_creds; 59 __be16 max_win_creds; 60 union { 61 __be16 reserved; 62 __be16 def_lpar_creds; /* Used for default capabilities */ 63 }; 64 __be16 target_lpar_creds; 65 } __packed __aligned(0x1000); 66 67 /* 68 * Feature specific (QoS or default) capabilities. 69 */ 70 struct vas_cop_feat_caps { 71 u64 descriptor; 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 */ 76 u16 max_win_creds; 77 union { 78 u16 reserved; /* Used for QoS credit type */ 79 u16 def_lpar_creds; /* Used for default credit type */ 80 }; 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 */ 85 }; 86 87 /* 88 * Feature (QoS or Default) specific to store capabilities and 89 * the list of open windows. 90 */ 91 struct vas_caps { 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 */ 97 }; 98 99 /* 100 * To get window information from the hypervisor. 101 */ 102 struct hv_vas_win_lpar { 103 __be16 version; 104 u8 win_type; 105 u8 status; 106 __be16 credits; /* No of credits assigned to this window */ 107 __be16 reserved; 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 */ 115 __be64 domain[6]; 116 __be64 win_util; /* Number of bytes processed */ 117 } __packed __aligned(0x1000); 118 119 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 */ 127 u64 util; 128 u32 pid; /* PID associated with this window */ 129 130 /* List of windows opened which is used for LPM */ 131 struct list_head win_list; 132 u64 flags; 133 char *name; 134 int fault_virq; 135 atomic_t pending_faults; /* Number of pending faults */ 136 }; 137 138 int sysfs_add_vas_caps(struct vas_cop_feat_caps *caps); 139 int vas_reconfig_capabilties(u8 type, int new_nr_creds); 140 int __init sysfs_pseries_vas_init(struct vas_all_caps *vas_caps); 141 142 #ifdef CONFIG_PPC_VAS 143 int vas_migration_handler(int action); 144 int pseries_vas_dlpar_cpu(void); 145 #else 146 static inline int vas_migration_handler(int action) 147 { 148 return 0; 149 } 150 static inline int pseries_vas_dlpar_cpu(void) 151 { 152 return 0; 153 } 154 #endif 155 #endif /* _VAS_H */ 156