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 /* 37 * Co-processor feature - GZIP QoS windows or GZIP default windows 38 */ 39 enum vas_cop_feat_type { 40 VAS_GZIP_QOS_FEAT_TYPE, 41 VAS_GZIP_DEF_FEAT_TYPE, 42 VAS_MAX_FEAT_TYPE, 43 }; 44 45 /* 46 * Use to get feature specific capabilities from the 47 * hypervisor. 48 */ 49 struct hv_vas_cop_feat_caps { 50 __be64 descriptor; 51 u8 win_type; /* Default or QoS type */ 52 u8 user_mode; 53 __be16 max_lpar_creds; 54 __be16 max_win_creds; 55 union { 56 __be16 reserved; 57 __be16 def_lpar_creds; /* Used for default capabilities */ 58 }; 59 __be16 target_lpar_creds; 60 } __packed __aligned(0x1000); 61 62 /* 63 * Feature specific (QoS or default) capabilities. 64 */ 65 struct vas_cop_feat_caps { 66 u64 descriptor; 67 u8 win_type; /* Default or QoS type */ 68 u8 user_mode; /* User mode copy/paste or COP HCALL */ 69 u16 max_lpar_creds; /* Max credits available in LPAR */ 70 /* Max credits can be assigned per window */ 71 u16 max_win_creds; 72 union { 73 u16 reserved; /* Used for QoS credit type */ 74 u16 def_lpar_creds; /* Used for default credit type */ 75 }; 76 /* Total LPAR available credits. Can be different from max LPAR */ 77 /* credits due to DLPAR operation */ 78 atomic_t nr_total_credits; /* Total credits assigned to LPAR */ 79 atomic_t nr_used_credits; /* Used credits so far */ 80 }; 81 82 /* 83 * Feature (QoS or Default) specific to store capabilities and 84 * the list of open windows. 85 */ 86 struct vas_caps { 87 struct vas_cop_feat_caps caps; 88 struct list_head list; /* List of open windows */ 89 int nr_close_wins; /* closed windows in the hypervisor for DLPAR */ 90 int nr_open_windows; /* Number of successful open windows */ 91 u8 feat; /* Feature type */ 92 }; 93 94 /* 95 * To get window information from the hypervisor. 96 */ 97 struct hv_vas_win_lpar { 98 __be16 version; 99 u8 win_type; 100 u8 status; 101 __be16 credits; /* No of credits assigned to this window */ 102 __be16 reserved; 103 __be32 pid; /* LPAR Process ID */ 104 __be32 tid; /* LPAR Thread ID */ 105 __be64 win_addr; /* Paste address */ 106 __be32 interrupt; /* Interrupt when NX request completes */ 107 __be32 fault; /* Interrupt when NX sees fault */ 108 /* Associativity Domain Identifiers as returned in */ 109 /* H_HOME_NODE_ASSOCIATIVITY */ 110 __be64 domain[6]; 111 __be64 win_util; /* Number of bytes processed */ 112 } __packed __aligned(0x1000); 113 114 struct pseries_vas_window { 115 struct vas_window vas_win; 116 u64 win_addr; /* Physical paste address */ 117 u8 win_type; /* QoS or Default window */ 118 u32 complete_irq; /* Completion interrupt */ 119 u32 fault_irq; /* Fault interrupt */ 120 u64 domain[6]; /* Associativity domain Ids */ 121 /* this window is allocated */ 122 u64 util; 123 u32 pid; /* PID associated with this window */ 124 125 /* List of windows opened which is used for LPM */ 126 struct list_head win_list; 127 u64 flags; 128 char *name; 129 int fault_virq; 130 }; 131 132 int sysfs_add_vas_caps(struct vas_cop_feat_caps *caps); 133 int __init sysfs_pseries_vas_init(struct vas_all_caps *vas_caps); 134 #endif /* _VAS_H */ 135