1 /* 2 * Copyright 2014 IBM Corp. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10 #ifndef _CXL_H_ 11 #define _CXL_H_ 12 13 #include <linux/interrupt.h> 14 #include <linux/semaphore.h> 15 #include <linux/device.h> 16 #include <linux/types.h> 17 #include <linux/cdev.h> 18 #include <linux/pid.h> 19 #include <linux/io.h> 20 #include <linux/pci.h> 21 #include <linux/fs.h> 22 #include <asm/cputable.h> 23 #include <asm/mmu.h> 24 #include <asm/reg.h> 25 #include <misc/cxl-base.h> 26 27 #include <misc/cxl.h> 28 #include <uapi/misc/cxl.h> 29 30 extern uint cxl_verbose; 31 32 #define CXL_TIMEOUT 5 33 34 /* 35 * Bump version each time a user API change is made, whether it is 36 * backwards compatible ot not. 37 */ 38 #define CXL_API_VERSION 3 39 #define CXL_API_VERSION_COMPATIBLE 1 40 41 /* 42 * Opaque types to avoid accidentally passing registers for the wrong MMIO 43 * 44 * At the end of the day, I'm not married to using typedef here, but it might 45 * (and has!) help avoid bugs like mixing up CXL_PSL_CtxTime and 46 * CXL_PSL_CtxTime_An, or calling cxl_p1n_write instead of cxl_p1_write. 47 * 48 * I'm quite happy if these are changed back to #defines before upstreaming, it 49 * should be little more than a regexp search+replace operation in this file. 50 */ 51 typedef struct { 52 const int x; 53 } cxl_p1_reg_t; 54 typedef struct { 55 const int x; 56 } cxl_p1n_reg_t; 57 typedef struct { 58 const int x; 59 } cxl_p2n_reg_t; 60 #define cxl_reg_off(reg) \ 61 (reg.x) 62 63 /* Memory maps. Ref CXL Appendix A */ 64 65 /* PSL Privilege 1 Memory Map */ 66 /* Configuration and Control area - CAIA 1&2 */ 67 static const cxl_p1_reg_t CXL_PSL_CtxTime = {0x0000}; 68 static const cxl_p1_reg_t CXL_PSL_ErrIVTE = {0x0008}; 69 static const cxl_p1_reg_t CXL_PSL_KEY1 = {0x0010}; 70 static const cxl_p1_reg_t CXL_PSL_KEY2 = {0x0018}; 71 static const cxl_p1_reg_t CXL_PSL_Control = {0x0020}; 72 /* Downloading */ 73 static const cxl_p1_reg_t CXL_PSL_DLCNTL = {0x0060}; 74 static const cxl_p1_reg_t CXL_PSL_DLADDR = {0x0068}; 75 76 /* PSL Lookaside Buffer Management Area - CAIA 1 */ 77 static const cxl_p1_reg_t CXL_PSL_LBISEL = {0x0080}; 78 static const cxl_p1_reg_t CXL_PSL_SLBIE = {0x0088}; 79 static const cxl_p1_reg_t CXL_PSL_SLBIA = {0x0090}; 80 static const cxl_p1_reg_t CXL_PSL_TLBIE = {0x00A0}; 81 static const cxl_p1_reg_t CXL_PSL_TLBIA = {0x00A8}; 82 static const cxl_p1_reg_t CXL_PSL_AFUSEL = {0x00B0}; 83 84 /* 0x00C0:7EFF Implementation dependent area */ 85 /* PSL registers - CAIA 1 */ 86 static const cxl_p1_reg_t CXL_PSL_FIR1 = {0x0100}; 87 static const cxl_p1_reg_t CXL_PSL_FIR2 = {0x0108}; 88 static const cxl_p1_reg_t CXL_PSL_Timebase = {0x0110}; 89 static const cxl_p1_reg_t CXL_PSL_VERSION = {0x0118}; 90 static const cxl_p1_reg_t CXL_PSL_RESLCKTO = {0x0128}; 91 static const cxl_p1_reg_t CXL_PSL_TB_CTLSTAT = {0x0140}; 92 static const cxl_p1_reg_t CXL_PSL_FIR_CNTL = {0x0148}; 93 static const cxl_p1_reg_t CXL_PSL_DSNDCTL = {0x0150}; 94 static const cxl_p1_reg_t CXL_PSL_SNWRALLOC = {0x0158}; 95 static const cxl_p1_reg_t CXL_PSL_TRACE = {0x0170}; 96 /* XSL registers (Mellanox CX4) */ 97 static const cxl_p1_reg_t CXL_XSL_Timebase = {0x0100}; 98 static const cxl_p1_reg_t CXL_XSL_TB_CTLSTAT = {0x0108}; 99 static const cxl_p1_reg_t CXL_XSL_FEC = {0x0158}; 100 static const cxl_p1_reg_t CXL_XSL_DSNCTL = {0x0168}; 101 /* PSL registers - CAIA 2 */ 102 static const cxl_p1_reg_t CXL_PSL9_CONTROL = {0x0020}; 103 static const cxl_p1_reg_t CXL_XSL9_INV = {0x0110}; 104 static const cxl_p1_reg_t CXL_XSL9_DBG = {0x0130}; 105 static const cxl_p1_reg_t CXL_XSL9_DEF = {0x0140}; 106 static const cxl_p1_reg_t CXL_XSL9_DSNCTL = {0x0168}; 107 static const cxl_p1_reg_t CXL_PSL9_FIR1 = {0x0300}; 108 static const cxl_p1_reg_t CXL_PSL9_FIR_MASK = {0x0308}; 109 static const cxl_p1_reg_t CXL_PSL9_Timebase = {0x0310}; 110 static const cxl_p1_reg_t CXL_PSL9_DEBUG = {0x0320}; 111 static const cxl_p1_reg_t CXL_PSL9_FIR_CNTL = {0x0348}; 112 static const cxl_p1_reg_t CXL_PSL9_DSNDCTL = {0x0350}; 113 static const cxl_p1_reg_t CXL_PSL9_TB_CTLSTAT = {0x0340}; 114 static const cxl_p1_reg_t CXL_PSL9_TRACECFG = {0x0368}; 115 static const cxl_p1_reg_t CXL_PSL9_APCDEDALLOC = {0x0378}; 116 static const cxl_p1_reg_t CXL_PSL9_APCDEDTYPE = {0x0380}; 117 static const cxl_p1_reg_t CXL_PSL9_TNR_ADDR = {0x0388}; 118 static const cxl_p1_reg_t CXL_PSL9_CTCCFG = {0x0390}; 119 static const cxl_p1_reg_t CXL_PSL9_GP_CT = {0x0398}; 120 static const cxl_p1_reg_t CXL_XSL9_IERAT = {0x0588}; 121 static const cxl_p1_reg_t CXL_XSL9_ILPP = {0x0590}; 122 123 /* 0x7F00:7FFF Reserved PCIe MSI-X Pending Bit Array area */ 124 /* 0x8000:FFFF Reserved PCIe MSI-X Table Area */ 125 126 /* PSL Slice Privilege 1 Memory Map */ 127 /* Configuration Area - CAIA 1&2 */ 128 static const cxl_p1n_reg_t CXL_PSL_SR_An = {0x00}; 129 static const cxl_p1n_reg_t CXL_PSL_LPID_An = {0x08}; 130 static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10}; 131 static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18}; 132 static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20}; 133 static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28}; 134 /* Memory Management and Lookaside Buffer Management - CAIA 1*/ 135 static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30}; 136 /* Memory Management and Lookaside Buffer Management - CAIA 1&2 */ 137 static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38}; 138 /* Pointer Area - CAIA 1&2 */ 139 static const cxl_p1n_reg_t CXL_HAURP_An = {0x80}; 140 static const cxl_p1n_reg_t CXL_PSL_SPAP_An = {0x88}; 141 static const cxl_p1n_reg_t CXL_PSL_LLCMD_An = {0x90}; 142 /* Control Area - CAIA 1&2 */ 143 static const cxl_p1n_reg_t CXL_PSL_SCNTL_An = {0xA0}; 144 static const cxl_p1n_reg_t CXL_PSL_CtxTime_An = {0xA8}; 145 static const cxl_p1n_reg_t CXL_PSL_IVTE_Offset_An = {0xB0}; 146 static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8}; 147 /* 0xC0:FF Implementation Dependent Area - CAIA 1&2 */ 148 static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0}; 149 static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8}; 150 /* 0xC0:FF Implementation Dependent Area - CAIA 1 */ 151 static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0}; 152 static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8}; 153 static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0}; 154 static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8}; 155 156 /* PSL Slice Privilege 2 Memory Map */ 157 /* Configuration and Control Area - CAIA 1&2 */ 158 static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000}; 159 static const cxl_p2n_reg_t CXL_CSRP_An = {0x008}; 160 /* Configuration and Control Area - CAIA 1 */ 161 static const cxl_p2n_reg_t CXL_AURP0_An = {0x010}; 162 static const cxl_p2n_reg_t CXL_AURP1_An = {0x018}; 163 static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020}; 164 static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028}; 165 /* Configuration and Control Area - CAIA 1 */ 166 static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030}; 167 /* Segment Lookaside Buffer Management - CAIA 1 */ 168 static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040}; 169 static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048}; 170 static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050}; 171 /* Interrupt Registers - CAIA 1&2 */ 172 static const cxl_p2n_reg_t CXL_PSL_DSISR_An = {0x060}; 173 static const cxl_p2n_reg_t CXL_PSL_DAR_An = {0x068}; 174 static const cxl_p2n_reg_t CXL_PSL_DSR_An = {0x070}; 175 static const cxl_p2n_reg_t CXL_PSL_TFC_An = {0x078}; 176 static const cxl_p2n_reg_t CXL_PSL_PEHandle_An = {0x080}; 177 static const cxl_p2n_reg_t CXL_PSL_ErrStat_An = {0x088}; 178 /* AFU Registers - CAIA 1&2 */ 179 static const cxl_p2n_reg_t CXL_AFU_Cntl_An = {0x090}; 180 static const cxl_p2n_reg_t CXL_AFU_ERR_An = {0x098}; 181 /* Work Element Descriptor - CAIA 1&2 */ 182 static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; 183 /* 0x0C0:FFF Implementation Dependent Area */ 184 185 #define CXL_PSL_SPAP_Addr 0x0ffffffffffff000ULL 186 #define CXL_PSL_SPAP_Size 0x0000000000000ff0ULL 187 #define CXL_PSL_SPAP_Size_Shift 4 188 #define CXL_PSL_SPAP_V 0x0000000000000001ULL 189 190 /****** CXL_PSL_Control ****************************************************/ 191 #define CXL_PSL_Control_tb (0x1ull << (63-63)) 192 #define CXL_PSL_Control_Fr (0x1ull << (63-31)) 193 #define CXL_PSL_Control_Fs_MASK (0x3ull << (63-29)) 194 #define CXL_PSL_Control_Fs_Complete (0x3ull << (63-29)) 195 196 /****** CXL_PSL_DLCNTL *****************************************************/ 197 #define CXL_PSL_DLCNTL_D (0x1ull << (63-28)) 198 #define CXL_PSL_DLCNTL_C (0x1ull << (63-29)) 199 #define CXL_PSL_DLCNTL_E (0x1ull << (63-30)) 200 #define CXL_PSL_DLCNTL_S (0x1ull << (63-31)) 201 #define CXL_PSL_DLCNTL_CE (CXL_PSL_DLCNTL_C | CXL_PSL_DLCNTL_E) 202 #define CXL_PSL_DLCNTL_DCES (CXL_PSL_DLCNTL_D | CXL_PSL_DLCNTL_CE | CXL_PSL_DLCNTL_S) 203 204 /****** CXL_PSL_SR_An ******************************************************/ 205 #define CXL_PSL_SR_An_SF MSR_SF /* 64bit */ 206 #define CXL_PSL_SR_An_TA (1ull << (63-1)) /* Tags active, GA1: 0 */ 207 #define CXL_PSL_SR_An_HV MSR_HV /* Hypervisor, GA1: 0 */ 208 #define CXL_PSL_SR_An_XLAT_hpt (0ull << (63-6))/* Hashed page table (HPT) mode */ 209 #define CXL_PSL_SR_An_XLAT_roh (2ull << (63-6))/* Radix on HPT mode */ 210 #define CXL_PSL_SR_An_XLAT_ror (3ull << (63-6))/* Radix on Radix mode */ 211 #define CXL_PSL_SR_An_BOT (1ull << (63-10)) /* Use the in-memory segment table */ 212 #define CXL_PSL_SR_An_PR MSR_PR /* Problem state, GA1: 1 */ 213 #define CXL_PSL_SR_An_ISL (1ull << (63-53)) /* Ignore Segment Large Page */ 214 #define CXL_PSL_SR_An_TC (1ull << (63-54)) /* Page Table secondary hash */ 215 #define CXL_PSL_SR_An_US (1ull << (63-56)) /* User state, GA1: X */ 216 #define CXL_PSL_SR_An_SC (1ull << (63-58)) /* Segment Table secondary hash */ 217 #define CXL_PSL_SR_An_R MSR_DR /* Relocate, GA1: 1 */ 218 #define CXL_PSL_SR_An_MP (1ull << (63-62)) /* Master Process */ 219 #define CXL_PSL_SR_An_LE (1ull << (63-63)) /* Little Endian */ 220 221 /****** CXL_PSL_ID_An ****************************************************/ 222 #define CXL_PSL_ID_An_F (1ull << (63-31)) 223 #define CXL_PSL_ID_An_L (1ull << (63-30)) 224 225 /****** CXL_PSL_SERR_An ****************************************************/ 226 #define CXL_PSL_SERR_An_afuto (1ull << (63-0)) 227 #define CXL_PSL_SERR_An_afudis (1ull << (63-1)) 228 #define CXL_PSL_SERR_An_afuov (1ull << (63-2)) 229 #define CXL_PSL_SERR_An_badsrc (1ull << (63-3)) 230 #define CXL_PSL_SERR_An_badctx (1ull << (63-4)) 231 #define CXL_PSL_SERR_An_llcmdis (1ull << (63-5)) 232 #define CXL_PSL_SERR_An_llcmdto (1ull << (63-6)) 233 #define CXL_PSL_SERR_An_afupar (1ull << (63-7)) 234 #define CXL_PSL_SERR_An_afudup (1ull << (63-8)) 235 #define CXL_PSL_SERR_An_IRQS ( \ 236 CXL_PSL_SERR_An_afuto | CXL_PSL_SERR_An_afudis | CXL_PSL_SERR_An_afuov | \ 237 CXL_PSL_SERR_An_badsrc | CXL_PSL_SERR_An_badctx | CXL_PSL_SERR_An_llcmdis | \ 238 CXL_PSL_SERR_An_llcmdto | CXL_PSL_SERR_An_afupar | CXL_PSL_SERR_An_afudup) 239 #define CXL_PSL_SERR_An_afuto_mask (1ull << (63-32)) 240 #define CXL_PSL_SERR_An_afudis_mask (1ull << (63-33)) 241 #define CXL_PSL_SERR_An_afuov_mask (1ull << (63-34)) 242 #define CXL_PSL_SERR_An_badsrc_mask (1ull << (63-35)) 243 #define CXL_PSL_SERR_An_badctx_mask (1ull << (63-36)) 244 #define CXL_PSL_SERR_An_llcmdis_mask (1ull << (63-37)) 245 #define CXL_PSL_SERR_An_llcmdto_mask (1ull << (63-38)) 246 #define CXL_PSL_SERR_An_afupar_mask (1ull << (63-39)) 247 #define CXL_PSL_SERR_An_afudup_mask (1ull << (63-40)) 248 #define CXL_PSL_SERR_An_IRQ_MASKS ( \ 249 CXL_PSL_SERR_An_afuto_mask | CXL_PSL_SERR_An_afudis_mask | CXL_PSL_SERR_An_afuov_mask | \ 250 CXL_PSL_SERR_An_badsrc_mask | CXL_PSL_SERR_An_badctx_mask | CXL_PSL_SERR_An_llcmdis_mask | \ 251 CXL_PSL_SERR_An_llcmdto_mask | CXL_PSL_SERR_An_afupar_mask | CXL_PSL_SERR_An_afudup_mask) 252 253 #define CXL_PSL_SERR_An_AE (1ull << (63-30)) 254 255 /****** CXL_PSL_SCNTL_An ****************************************************/ 256 #define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) 257 /* Programming Modes: */ 258 #define CXL_PSL_SCNTL_An_PM_MASK (0xffffull << (63-31)) 259 #define CXL_PSL_SCNTL_An_PM_Shared (0x0000ull << (63-31)) 260 #define CXL_PSL_SCNTL_An_PM_OS (0x0001ull << (63-31)) 261 #define CXL_PSL_SCNTL_An_PM_Process (0x0002ull << (63-31)) 262 #define CXL_PSL_SCNTL_An_PM_AFU (0x0004ull << (63-31)) 263 #define CXL_PSL_SCNTL_An_PM_AFU_PBT (0x0104ull << (63-31)) 264 /* Purge Status (ro) */ 265 #define CXL_PSL_SCNTL_An_Ps_MASK (0x3ull << (63-39)) 266 #define CXL_PSL_SCNTL_An_Ps_Pending (0x1ull << (63-39)) 267 #define CXL_PSL_SCNTL_An_Ps_Complete (0x3ull << (63-39)) 268 /* Purge */ 269 #define CXL_PSL_SCNTL_An_Pc (0x1ull << (63-48)) 270 /* Suspend Status (ro) */ 271 #define CXL_PSL_SCNTL_An_Ss_MASK (0x3ull << (63-55)) 272 #define CXL_PSL_SCNTL_An_Ss_Pending (0x1ull << (63-55)) 273 #define CXL_PSL_SCNTL_An_Ss_Complete (0x3ull << (63-55)) 274 /* Suspend Control */ 275 #define CXL_PSL_SCNTL_An_Sc (0x1ull << (63-63)) 276 277 /* AFU Slice Enable Status (ro) */ 278 #define CXL_AFU_Cntl_An_ES_MASK (0x7ull << (63-2)) 279 #define CXL_AFU_Cntl_An_ES_Disabled (0x0ull << (63-2)) 280 #define CXL_AFU_Cntl_An_ES_Enabled (0x4ull << (63-2)) 281 /* AFU Slice Enable */ 282 #define CXL_AFU_Cntl_An_E (0x1ull << (63-3)) 283 /* AFU Slice Reset status (ro) */ 284 #define CXL_AFU_Cntl_An_RS_MASK (0x3ull << (63-5)) 285 #define CXL_AFU_Cntl_An_RS_Pending (0x1ull << (63-5)) 286 #define CXL_AFU_Cntl_An_RS_Complete (0x2ull << (63-5)) 287 /* AFU Slice Reset */ 288 #define CXL_AFU_Cntl_An_RA (0x1ull << (63-7)) 289 290 /****** CXL_SSTP0/1_An ******************************************************/ 291 /* These top bits are for the segment that CONTAINS the segment table */ 292 #define CXL_SSTP0_An_B_SHIFT SLB_VSID_SSIZE_SHIFT 293 #define CXL_SSTP0_An_KS (1ull << (63-2)) 294 #define CXL_SSTP0_An_KP (1ull << (63-3)) 295 #define CXL_SSTP0_An_N (1ull << (63-4)) 296 #define CXL_SSTP0_An_L (1ull << (63-5)) 297 #define CXL_SSTP0_An_C (1ull << (63-6)) 298 #define CXL_SSTP0_An_TA (1ull << (63-7)) 299 #define CXL_SSTP0_An_LP_SHIFT (63-9) /* 2 Bits */ 300 /* And finally, the virtual address & size of the segment table: */ 301 #define CXL_SSTP0_An_SegTableSize_SHIFT (63-31) /* 12 Bits */ 302 #define CXL_SSTP0_An_SegTableSize_MASK \ 303 (((1ull << 12) - 1) << CXL_SSTP0_An_SegTableSize_SHIFT) 304 #define CXL_SSTP0_An_STVA_U_MASK ((1ull << (63-49))-1) 305 #define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1)) 306 #define CXL_SSTP1_An_V (1ull << (63-63)) 307 308 /****** CXL_PSL_SLBIE_[An] - CAIA 1 **************************************************/ 309 /* write: */ 310 #define CXL_SLBIE_C PPC_BIT(36) /* Class */ 311 #define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */ 312 #define CXL_SLBIE_SS_SHIFT PPC_BITLSHIFT(38) 313 #define CXL_SLBIE_TA PPC_BIT(38) /* Tags Active */ 314 /* read: */ 315 #define CXL_SLBIE_MAX PPC_BITMASK(24, 31) 316 #define CXL_SLBIE_PENDING PPC_BITMASK(56, 63) 317 318 /****** Common to all CXL_TLBIA/SLBIA_[An] - CAIA 1 **********************************/ 319 #define CXL_TLB_SLB_P (1ull) /* Pending (read) */ 320 321 /****** Common to all CXL_TLB/SLB_IA/IE_[An] registers - CAIA 1 **********************/ 322 #define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */ 323 #define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */ 324 #define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */ 325 326 /****** CXL_PSL_AFUSEL ******************************************************/ 327 #define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */ 328 329 /****** CXL_PSL_DSISR_An - CAIA 1 ****************************************************/ 330 #define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */ 331 #define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */ 332 #define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */ 333 #define CXL_PSL_DSISR_An_UR (1ull << (63-3)) /* AURP PTE not found */ 334 #define CXL_PSL_DSISR_TRANS (CXL_PSL_DSISR_An_DS | CXL_PSL_DSISR_An_DM | CXL_PSL_DSISR_An_ST | CXL_PSL_DSISR_An_UR) 335 #define CXL_PSL_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ 336 #define CXL_PSL_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ 337 #define CXL_PSL_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ 338 #define CXL_PSL_DSISR_PENDING (CXL_PSL_DSISR_TRANS | CXL_PSL_DSISR_An_PE | CXL_PSL_DSISR_An_AE | CXL_PSL_DSISR_An_OC) 339 /* NOTE: Bits 32:63 are undefined if DSISR[DS] = 1 */ 340 #define CXL_PSL_DSISR_An_M DSISR_NOHPTE /* PTE not found */ 341 #define CXL_PSL_DSISR_An_P DSISR_PROTFAULT /* Storage protection violation */ 342 #define CXL_PSL_DSISR_An_A (1ull << (63-37)) /* AFU lock access to write through or cache inhibited storage */ 343 #define CXL_PSL_DSISR_An_S DSISR_ISSTORE /* Access was afu_wr or afu_zero */ 344 #define CXL_PSL_DSISR_An_K DSISR_KEYFAULT /* Access not permitted by virtual page class key protection */ 345 346 /****** CXL_PSL_DSISR_An - CAIA 2 ****************************************************/ 347 #define CXL_PSL9_DSISR_An_TF (1ull << (63-3)) /* Translation fault */ 348 #define CXL_PSL9_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ 349 #define CXL_PSL9_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ 350 #define CXL_PSL9_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ 351 #define CXL_PSL9_DSISR_An_S (1ull << (63-38)) /* TF for a write operation */ 352 #define CXL_PSL9_DSISR_PENDING (CXL_PSL9_DSISR_An_TF | CXL_PSL9_DSISR_An_PE | CXL_PSL9_DSISR_An_AE | CXL_PSL9_DSISR_An_OC) 353 /* 354 * NOTE: Bits 56:63 (Checkout Response Status) are valid when DSISR_An[TF] = 1 355 * Status (0:7) Encoding 356 */ 357 #define CXL_PSL9_DSISR_An_CO_MASK 0x00000000000000ffULL 358 #define CXL_PSL9_DSISR_An_SF 0x0000000000000080ULL /* Segment Fault 0b10000000 */ 359 #define CXL_PSL9_DSISR_An_PF_SLR 0x0000000000000088ULL /* PTE not found (Single Level Radix) 0b10001000 */ 360 #define CXL_PSL9_DSISR_An_PF_RGC 0x000000000000008CULL /* PTE not found (Radix Guest (child)) 0b10001100 */ 361 #define CXL_PSL9_DSISR_An_PF_RGP 0x0000000000000090ULL /* PTE not found (Radix Guest (parent)) 0b10010000 */ 362 #define CXL_PSL9_DSISR_An_PF_HRH 0x0000000000000094ULL /* PTE not found (HPT/Radix Host) 0b10010100 */ 363 #define CXL_PSL9_DSISR_An_PF_STEG 0x000000000000009CULL /* PTE not found (STEG VA) 0b10011100 */ 364 #define CXL_PSL9_DSISR_An_URTCH 0x00000000000000B4ULL /* Unsupported Radix Tree Configuration 0b10110100 */ 365 366 /****** CXL_PSL_TFC_An ******************************************************/ 367 #define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */ 368 #define CXL_PSL_TFC_An_C (1ull << (63-29)) /* Continue (abort transaction) */ 369 #define CXL_PSL_TFC_An_AE (1ull << (63-30)) /* Restart PSL with address error */ 370 #define CXL_PSL_TFC_An_R (1ull << (63-31)) /* Restart PSL transaction */ 371 372 /****** CXL_XSL9_IERAT_ERAT - CAIA 2 **********************************/ 373 #define CXL_XSL9_IERAT_MLPID (1ull << (63-0)) /* Match LPID */ 374 #define CXL_XSL9_IERAT_MPID (1ull << (63-1)) /* Match PID */ 375 #define CXL_XSL9_IERAT_PRS (1ull << (63-4)) /* PRS bit for Radix invalidations */ 376 #define CXL_XSL9_IERAT_INVR (1ull << (63-3)) /* Invalidate Radix */ 377 #define CXL_XSL9_IERAT_IALL (1ull << (63-8)) /* Invalidate All */ 378 #define CXL_XSL9_IERAT_IINPROG (1ull << (63-63)) /* Invalidate in progress */ 379 380 /* cxl_process_element->software_status */ 381 #define CXL_PE_SOFTWARE_STATE_V (1ul << (31 - 0)) /* Valid */ 382 #define CXL_PE_SOFTWARE_STATE_C (1ul << (31 - 29)) /* Complete */ 383 #define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */ 384 #define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */ 385 386 /****** CXL_PSL_RXCTL_An (Implementation Specific) ************************** 387 * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to 388 * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x 389 * of the hang pulse frequency. 390 */ 391 #define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL 392 393 /* SPA->sw_command_status */ 394 #define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL 395 #define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL 396 #define CXL_SPA_SW_CMD_REMOVE 0x0002000000000000ULL 397 #define CXL_SPA_SW_CMD_SUSPEND 0x0003000000000000ULL 398 #define CXL_SPA_SW_CMD_RESUME 0x0004000000000000ULL 399 #define CXL_SPA_SW_CMD_ADD 0x0005000000000000ULL 400 #define CXL_SPA_SW_CMD_UPDATE 0x0006000000000000ULL 401 #define CXL_SPA_SW_STATE_MASK 0x0000ffff00000000ULL 402 #define CXL_SPA_SW_STATE_TERMINATED 0x0000000100000000ULL 403 #define CXL_SPA_SW_STATE_REMOVED 0x0000000200000000ULL 404 #define CXL_SPA_SW_STATE_SUSPENDED 0x0000000300000000ULL 405 #define CXL_SPA_SW_STATE_RESUMED 0x0000000400000000ULL 406 #define CXL_SPA_SW_STATE_ADDED 0x0000000500000000ULL 407 #define CXL_SPA_SW_STATE_UPDATED 0x0000000600000000ULL 408 #define CXL_SPA_SW_PSL_ID_MASK 0x00000000ffff0000ULL 409 #define CXL_SPA_SW_LINK_MASK 0x000000000000ffffULL 410 411 #define CXL_MAX_SLICES 4 412 #define MAX_AFU_MMIO_REGS 3 413 414 #define CXL_MODE_TIME_SLICED 0x4 415 #define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) 416 417 #define CXL_DEV_MINORS 13 /* 1 control + 4 AFUs * 3 (dedicated/master/shared) */ 418 #define CXL_CARD_MINOR(adapter) (adapter->adapter_num * CXL_DEV_MINORS) 419 #define CXL_DEVT_ADAPTER(dev) (MINOR(dev) / CXL_DEV_MINORS) 420 421 #define CXL_PSL9_TRACEID_MAX 0xAU 422 #define CXL_PSL9_TRACESTATE_FIN 0x3U 423 424 enum cxl_context_status { 425 CLOSED, 426 OPENED, 427 STARTED 428 }; 429 430 enum prefault_modes { 431 CXL_PREFAULT_NONE, 432 CXL_PREFAULT_WED, 433 CXL_PREFAULT_ALL, 434 }; 435 436 enum cxl_attrs { 437 CXL_ADAPTER_ATTRS, 438 CXL_AFU_MASTER_ATTRS, 439 CXL_AFU_ATTRS, 440 }; 441 442 struct cxl_sste { 443 __be64 esid_data; 444 __be64 vsid_data; 445 }; 446 447 #define to_cxl_adapter(d) container_of(d, struct cxl, dev) 448 #define to_cxl_afu(d) container_of(d, struct cxl_afu, dev) 449 450 struct cxl_afu_native { 451 void __iomem *p1n_mmio; 452 void __iomem *afu_desc_mmio; 453 irq_hw_number_t psl_hwirq; 454 unsigned int psl_virq; 455 struct mutex spa_mutex; 456 /* 457 * Only the first part of the SPA is used for the process element 458 * linked list. The only other part that software needs to worry about 459 * is sw_command_status, which we store a separate pointer to. 460 * Everything else in the SPA is only used by hardware 461 */ 462 struct cxl_process_element *spa; 463 __be64 *sw_command_status; 464 unsigned int spa_size; 465 int spa_order; 466 int spa_max_procs; 467 u64 pp_offset; 468 }; 469 470 struct cxl_afu_guest { 471 struct cxl_afu *parent; 472 u64 handle; 473 phys_addr_t p2n_phys; 474 u64 p2n_size; 475 int max_ints; 476 bool handle_err; 477 struct delayed_work work_err; 478 int previous_state; 479 }; 480 481 struct cxl_afu { 482 struct cxl_afu_native *native; 483 struct cxl_afu_guest *guest; 484 irq_hw_number_t serr_hwirq; 485 unsigned int serr_virq; 486 char *psl_irq_name; 487 char *err_irq_name; 488 void __iomem *p2n_mmio; 489 phys_addr_t psn_phys; 490 u64 pp_size; 491 492 struct cxl *adapter; 493 struct device dev; 494 struct cdev afu_cdev_s, afu_cdev_m, afu_cdev_d; 495 struct device *chardev_s, *chardev_m, *chardev_d; 496 struct idr contexts_idr; 497 struct dentry *debugfs; 498 struct mutex contexts_lock; 499 spinlock_t afu_cntl_lock; 500 501 /* -1: AFU deconfigured/locked, >= 0: number of readers */ 502 atomic_t configured_state; 503 504 /* AFU error buffer fields and bin attribute for sysfs */ 505 u64 eb_len, eb_offset; 506 struct bin_attribute attr_eb; 507 508 /* pointer to the vphb */ 509 struct pci_controller *phb; 510 511 int pp_irqs; 512 int irqs_max; 513 int num_procs; 514 int max_procs_virtualised; 515 int slice; 516 int modes_supported; 517 int current_mode; 518 int crs_num; 519 u64 crs_len; 520 u64 crs_offset; 521 struct list_head crs; 522 enum prefault_modes prefault_mode; 523 bool psa; 524 bool pp_psa; 525 bool enabled; 526 }; 527 528 529 struct cxl_irq_name { 530 struct list_head list; 531 char *name; 532 }; 533 534 struct irq_avail { 535 irq_hw_number_t offset; 536 irq_hw_number_t range; 537 unsigned long *bitmap; 538 }; 539 540 /* 541 * This is a cxl context. If the PSL is in dedicated mode, there will be one 542 * of these per AFU. If in AFU directed there can be lots of these. 543 */ 544 struct cxl_context { 545 struct cxl_afu *afu; 546 547 /* Problem state MMIO */ 548 phys_addr_t psn_phys; 549 u64 psn_size; 550 551 /* Used to unmap any mmaps when force detaching */ 552 struct address_space *mapping; 553 struct mutex mapping_lock; 554 struct page *ff_page; 555 bool mmio_err_ff; 556 bool kernelapi; 557 558 spinlock_t sste_lock; /* Protects segment table entries */ 559 struct cxl_sste *sstp; 560 u64 sstp0, sstp1; 561 unsigned int sst_size, sst_lru; 562 563 wait_queue_head_t wq; 564 /* use mm context associated with this pid for ds faults */ 565 struct pid *pid; 566 spinlock_t lock; /* Protects pending_irq_mask, pending_fault and fault_addr */ 567 /* Only used in PR mode */ 568 u64 process_token; 569 570 /* driver private data */ 571 void *priv; 572 573 unsigned long *irq_bitmap; /* Accessed from IRQ context */ 574 struct cxl_irq_ranges irqs; 575 struct list_head irq_names; 576 u64 fault_addr; 577 u64 fault_dsisr; 578 u64 afu_err; 579 580 /* 581 * This status and it's lock pretects start and detach context 582 * from racing. It also prevents detach from racing with 583 * itself 584 */ 585 enum cxl_context_status status; 586 struct mutex status_mutex; 587 588 589 /* XXX: Is it possible to need multiple work items at once? */ 590 struct work_struct fault_work; 591 u64 dsisr; 592 u64 dar; 593 594 struct cxl_process_element *elem; 595 596 /* 597 * pe is the process element handle, assigned by this driver when the 598 * context is initialized. 599 * 600 * external_pe is the PE shown outside of cxl. 601 * On bare-metal, pe=external_pe, because we decide what the handle is. 602 * In a guest, we only find out about the pe used by pHyp when the 603 * context is attached, and that's the value we want to report outside 604 * of cxl. 605 */ 606 int pe; 607 int external_pe; 608 609 u32 irq_count; 610 bool pe_inserted; 611 bool master; 612 bool kernel; 613 bool real_mode; 614 bool pending_irq; 615 bool pending_fault; 616 bool pending_afu_err; 617 618 /* Used by AFU drivers for driver specific event delivery */ 619 struct cxl_afu_driver_ops *afu_driver_ops; 620 atomic_t afu_driver_events; 621 622 struct rcu_head rcu; 623 624 /* 625 * Only used when more interrupts are allocated via 626 * pci_enable_msix_range than are supported in the default context, to 627 * use additional contexts to overcome the limitation. i.e. Mellanox 628 * CX4 only: 629 */ 630 struct list_head extra_irq_contexts; 631 632 struct mm_struct *mm; 633 634 u16 tidr; 635 bool assign_tidr; 636 }; 637 638 struct cxl_irq_info; 639 640 struct cxl_service_layer_ops { 641 int (*adapter_regs_init)(struct cxl *adapter, struct pci_dev *dev); 642 int (*invalidate_all)(struct cxl *adapter); 643 int (*afu_regs_init)(struct cxl_afu *afu); 644 int (*sanitise_afu_regs)(struct cxl_afu *afu); 645 int (*register_serr_irq)(struct cxl_afu *afu); 646 void (*release_serr_irq)(struct cxl_afu *afu); 647 irqreturn_t (*handle_interrupt)(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); 648 irqreturn_t (*fail_irq)(struct cxl_afu *afu, struct cxl_irq_info *irq_info); 649 int (*activate_dedicated_process)(struct cxl_afu *afu); 650 int (*attach_afu_directed)(struct cxl_context *ctx, u64 wed, u64 amr); 651 int (*attach_dedicated_process)(struct cxl_context *ctx, u64 wed, u64 amr); 652 void (*update_dedicated_ivtes)(struct cxl_context *ctx); 653 void (*debugfs_add_adapter_regs)(struct cxl *adapter, struct dentry *dir); 654 void (*debugfs_add_afu_regs)(struct cxl_afu *afu, struct dentry *dir); 655 void (*psl_irq_dump_registers)(struct cxl_context *ctx); 656 void (*err_irq_dump_registers)(struct cxl *adapter); 657 void (*debugfs_stop_trace)(struct cxl *adapter); 658 void (*write_timebase_ctrl)(struct cxl *adapter); 659 u64 (*timebase_read)(struct cxl *adapter); 660 int capi_mode; 661 bool needs_reset_before_disable; 662 }; 663 664 struct cxl_native { 665 u64 afu_desc_off; 666 u64 afu_desc_size; 667 void __iomem *p1_mmio; 668 void __iomem *p2_mmio; 669 irq_hw_number_t err_hwirq; 670 unsigned int err_virq; 671 u64 ps_off; 672 const struct cxl_service_layer_ops *sl_ops; 673 }; 674 675 struct cxl_guest { 676 struct platform_device *pdev; 677 int irq_nranges; 678 struct cdev cdev; 679 irq_hw_number_t irq_base_offset; 680 struct irq_avail *irq_avail; 681 spinlock_t irq_alloc_lock; 682 u64 handle; 683 char *status; 684 u16 vendor; 685 u16 device; 686 u16 subsystem_vendor; 687 u16 subsystem; 688 }; 689 690 struct cxl { 691 struct cxl_native *native; 692 struct cxl_guest *guest; 693 spinlock_t afu_list_lock; 694 struct cxl_afu *afu[CXL_MAX_SLICES]; 695 struct device dev; 696 struct dentry *trace; 697 struct dentry *psl_err_chk; 698 struct dentry *debugfs; 699 char *irq_name; 700 struct bin_attribute cxl_attr; 701 int adapter_num; 702 int user_irqs; 703 int min_pe; 704 u64 ps_size; 705 u16 psl_rev; 706 u16 base_image; 707 u8 vsec_status; 708 u8 caia_major; 709 u8 caia_minor; 710 u8 slices; 711 bool user_image_loaded; 712 bool perst_loads_image; 713 bool perst_select_user; 714 bool perst_same_image; 715 bool psl_timebase_synced; 716 717 /* 718 * number of contexts mapped on to this card. Possible values are: 719 * >0: Number of contexts mapped and new one can be mapped. 720 * 0: No active contexts and new ones can be mapped. 721 * -1: No contexts mapped and new ones cannot be mapped. 722 */ 723 atomic_t contexts_num; 724 }; 725 726 int cxl_pci_alloc_one_irq(struct cxl *adapter); 727 void cxl_pci_release_one_irq(struct cxl *adapter, int hwirq); 728 int cxl_pci_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num); 729 void cxl_pci_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter); 730 int cxl_pci_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq); 731 int cxl_update_image_control(struct cxl *adapter); 732 int cxl_pci_reset(struct cxl *adapter); 733 void cxl_pci_release_afu(struct device *dev); 734 ssize_t cxl_pci_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); 735 736 /* common == phyp + powernv - CAIA 1&2 */ 737 struct cxl_process_element_common { 738 __be32 tid; 739 __be32 pid; 740 __be64 csrp; 741 union { 742 struct { 743 __be64 aurp0; 744 __be64 aurp1; 745 __be64 sstp0; 746 __be64 sstp1; 747 } psl8; /* CAIA 1 */ 748 struct { 749 u8 reserved2[8]; 750 u8 reserved3[8]; 751 u8 reserved4[8]; 752 u8 reserved5[8]; 753 } psl9; /* CAIA 2 */ 754 } u; 755 __be64 amr; 756 u8 reserved6[4]; 757 __be64 wed; 758 } __packed; 759 760 /* just powernv - CAIA 1&2 */ 761 struct cxl_process_element { 762 __be64 sr; 763 __be64 SPOffset; 764 union { 765 __be64 sdr; /* CAIA 1 */ 766 u8 reserved1[8]; /* CAIA 2 */ 767 } u; 768 __be64 haurp; 769 __be32 ctxtime; 770 __be16 ivte_offsets[4]; 771 __be16 ivte_ranges[4]; 772 __be32 lpid; 773 struct cxl_process_element_common common; 774 __be32 software_state; 775 } __packed; 776 777 static inline bool cxl_adapter_link_ok(struct cxl *cxl, struct cxl_afu *afu) 778 { 779 struct pci_dev *pdev; 780 781 if (cpu_has_feature(CPU_FTR_HVMODE)) { 782 pdev = to_pci_dev(cxl->dev.parent); 783 return !pci_channel_offline(pdev); 784 } 785 return true; 786 } 787 788 static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg) 789 { 790 WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); 791 return cxl->native->p1_mmio + cxl_reg_off(reg); 792 } 793 794 static inline void cxl_p1_write(struct cxl *cxl, cxl_p1_reg_t reg, u64 val) 795 { 796 if (likely(cxl_adapter_link_ok(cxl, NULL))) 797 out_be64(_cxl_p1_addr(cxl, reg), val); 798 } 799 800 static inline u64 cxl_p1_read(struct cxl *cxl, cxl_p1_reg_t reg) 801 { 802 if (likely(cxl_adapter_link_ok(cxl, NULL))) 803 return in_be64(_cxl_p1_addr(cxl, reg)); 804 else 805 return ~0ULL; 806 } 807 808 static inline void __iomem *_cxl_p1n_addr(struct cxl_afu *afu, cxl_p1n_reg_t reg) 809 { 810 WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); 811 return afu->native->p1n_mmio + cxl_reg_off(reg); 812 } 813 814 static inline void cxl_p1n_write(struct cxl_afu *afu, cxl_p1n_reg_t reg, u64 val) 815 { 816 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 817 out_be64(_cxl_p1n_addr(afu, reg), val); 818 } 819 820 static inline u64 cxl_p1n_read(struct cxl_afu *afu, cxl_p1n_reg_t reg) 821 { 822 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 823 return in_be64(_cxl_p1n_addr(afu, reg)); 824 else 825 return ~0ULL; 826 } 827 828 static inline void __iomem *_cxl_p2n_addr(struct cxl_afu *afu, cxl_p2n_reg_t reg) 829 { 830 return afu->p2n_mmio + cxl_reg_off(reg); 831 } 832 833 static inline void cxl_p2n_write(struct cxl_afu *afu, cxl_p2n_reg_t reg, u64 val) 834 { 835 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 836 out_be64(_cxl_p2n_addr(afu, reg), val); 837 } 838 839 static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg) 840 { 841 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 842 return in_be64(_cxl_p2n_addr(afu, reg)); 843 else 844 return ~0ULL; 845 } 846 847 static inline bool cxl_is_power8(void) 848 { 849 if ((pvr_version_is(PVR_POWER8E)) || 850 (pvr_version_is(PVR_POWER8NVL)) || 851 (pvr_version_is(PVR_POWER8))) 852 return true; 853 return false; 854 } 855 856 static inline bool cxl_is_power9(void) 857 { 858 if (pvr_version_is(PVR_POWER9)) 859 return true; 860 return false; 861 } 862 863 static inline bool cxl_is_power9_dd1(void) 864 { 865 if ((pvr_version_is(PVR_POWER9)) && 866 cpu_has_feature(CPU_FTR_POWER9_DD1)) 867 return true; 868 return false; 869 } 870 871 ssize_t cxl_pci_afu_read_err_buffer(struct cxl_afu *afu, char *buf, 872 loff_t off, size_t count); 873 874 /* Internal functions wrapped in cxl_base to allow PHB to call them */ 875 bool _cxl_pci_associate_default_context(struct pci_dev *dev, struct cxl_afu *afu); 876 void _cxl_pci_disable_device(struct pci_dev *dev); 877 int _cxl_next_msi_hwirq(struct pci_dev *pdev, struct cxl_context **ctx, int *afu_irq); 878 int _cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type); 879 void _cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev); 880 881 struct cxl_calls { 882 void (*cxl_slbia)(struct mm_struct *mm); 883 bool (*cxl_pci_associate_default_context)(struct pci_dev *dev, struct cxl_afu *afu); 884 void (*cxl_pci_disable_device)(struct pci_dev *dev); 885 int (*cxl_next_msi_hwirq)(struct pci_dev *pdev, struct cxl_context **ctx, int *afu_irq); 886 int (*cxl_cx4_setup_msi_irqs)(struct pci_dev *pdev, int nvec, int type); 887 void (*cxl_cx4_teardown_msi_irqs)(struct pci_dev *pdev); 888 889 struct module *owner; 890 }; 891 int register_cxl_calls(struct cxl_calls *calls); 892 void unregister_cxl_calls(struct cxl_calls *calls); 893 int cxl_update_properties(struct device_node *dn, struct property *new_prop); 894 895 void cxl_remove_adapter_nr(struct cxl *adapter); 896 897 void cxl_release_spa(struct cxl_afu *afu); 898 899 dev_t cxl_get_dev(void); 900 int cxl_file_init(void); 901 void cxl_file_exit(void); 902 int cxl_register_adapter(struct cxl *adapter); 903 int cxl_register_afu(struct cxl_afu *afu); 904 int cxl_chardev_d_afu_add(struct cxl_afu *afu); 905 int cxl_chardev_m_afu_add(struct cxl_afu *afu); 906 int cxl_chardev_s_afu_add(struct cxl_afu *afu); 907 void cxl_chardev_afu_remove(struct cxl_afu *afu); 908 909 void cxl_context_detach_all(struct cxl_afu *afu); 910 void cxl_context_free(struct cxl_context *ctx); 911 void cxl_context_detach(struct cxl_context *ctx); 912 913 int cxl_sysfs_adapter_add(struct cxl *adapter); 914 void cxl_sysfs_adapter_remove(struct cxl *adapter); 915 int cxl_sysfs_afu_add(struct cxl_afu *afu); 916 void cxl_sysfs_afu_remove(struct cxl_afu *afu); 917 int cxl_sysfs_afu_m_add(struct cxl_afu *afu); 918 void cxl_sysfs_afu_m_remove(struct cxl_afu *afu); 919 920 struct cxl *cxl_alloc_adapter(void); 921 struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice); 922 int cxl_afu_select_best_mode(struct cxl_afu *afu); 923 924 int cxl_native_register_psl_irq(struct cxl_afu *afu); 925 void cxl_native_release_psl_irq(struct cxl_afu *afu); 926 int cxl_native_register_psl_err_irq(struct cxl *adapter); 927 void cxl_native_release_psl_err_irq(struct cxl *adapter); 928 int cxl_native_register_serr_irq(struct cxl_afu *afu); 929 void cxl_native_release_serr_irq(struct cxl_afu *afu); 930 int afu_register_irqs(struct cxl_context *ctx, u32 count); 931 void afu_release_irqs(struct cxl_context *ctx, void *cookie); 932 void afu_irq_name_free(struct cxl_context *ctx); 933 934 int cxl_attach_afu_directed_psl9(struct cxl_context *ctx, u64 wed, u64 amr); 935 int cxl_attach_afu_directed_psl8(struct cxl_context *ctx, u64 wed, u64 amr); 936 int cxl_activate_dedicated_process_psl9(struct cxl_afu *afu); 937 int cxl_activate_dedicated_process_psl8(struct cxl_afu *afu); 938 int cxl_attach_dedicated_process_psl9(struct cxl_context *ctx, u64 wed, u64 amr); 939 int cxl_attach_dedicated_process_psl8(struct cxl_context *ctx, u64 wed, u64 amr); 940 void cxl_update_dedicated_ivtes_psl9(struct cxl_context *ctx); 941 void cxl_update_dedicated_ivtes_psl8(struct cxl_context *ctx); 942 943 #ifdef CONFIG_DEBUG_FS 944 945 int cxl_debugfs_init(void); 946 void cxl_debugfs_exit(void); 947 int cxl_debugfs_adapter_add(struct cxl *adapter); 948 void cxl_debugfs_adapter_remove(struct cxl *adapter); 949 int cxl_debugfs_afu_add(struct cxl_afu *afu); 950 void cxl_debugfs_afu_remove(struct cxl_afu *afu); 951 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir); 952 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir); 953 void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir); 954 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir); 955 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir); 956 957 #else /* CONFIG_DEBUG_FS */ 958 959 static inline int __init cxl_debugfs_init(void) 960 { 961 return 0; 962 } 963 964 static inline void cxl_debugfs_exit(void) 965 { 966 } 967 968 static inline int cxl_debugfs_adapter_add(struct cxl *adapter) 969 { 970 return 0; 971 } 972 973 static inline void cxl_debugfs_adapter_remove(struct cxl *adapter) 974 { 975 } 976 977 static inline int cxl_debugfs_afu_add(struct cxl_afu *afu) 978 { 979 return 0; 980 } 981 982 static inline void cxl_debugfs_afu_remove(struct cxl_afu *afu) 983 { 984 } 985 986 static inline void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, 987 struct dentry *dir) 988 { 989 } 990 991 static inline void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, 992 struct dentry *dir) 993 { 994 } 995 996 static inline void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, 997 struct dentry *dir) 998 { 999 } 1000 1001 static inline void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir) 1002 { 1003 } 1004 1005 static inline void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) 1006 { 1007 } 1008 1009 #endif /* CONFIG_DEBUG_FS */ 1010 1011 void cxl_handle_fault(struct work_struct *work); 1012 void cxl_prefault(struct cxl_context *ctx, u64 wed); 1013 int cxl_handle_mm_fault(struct mm_struct *mm, u64 dsisr, u64 dar); 1014 1015 struct cxl *get_cxl_adapter(int num); 1016 int cxl_alloc_sst(struct cxl_context *ctx); 1017 void cxl_dump_debug_buffer(void *addr, size_t size); 1018 1019 void init_cxl_native(void); 1020 1021 struct cxl_context *cxl_context_alloc(void); 1022 int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master); 1023 void cxl_context_set_mapping(struct cxl_context *ctx, 1024 struct address_space *mapping); 1025 void cxl_context_free(struct cxl_context *ctx); 1026 int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma); 1027 unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq, 1028 irq_handler_t handler, void *cookie, const char *name); 1029 void cxl_unmap_irq(unsigned int virq, void *cookie); 1030 int __detach_context(struct cxl_context *ctx); 1031 1032 /* 1033 * This must match the layout of the H_COLLECT_CA_INT_INFO retbuf defined 1034 * in PAPR. 1035 * Field pid_tid is now 'reserved' because it's no more used on bare-metal. 1036 * On a guest environment, PSL_PID_An is located on the upper 32 bits and 1037 * PSL_TID_An register in the lower 32 bits. 1038 */ 1039 struct cxl_irq_info { 1040 u64 dsisr; 1041 u64 dar; 1042 u64 dsr; 1043 u64 reserved; 1044 u64 afu_err; 1045 u64 errstat; 1046 u64 proc_handle; 1047 u64 padding[2]; /* to match the expected retbuf size for plpar_hcall9 */ 1048 }; 1049 1050 void cxl_assign_psn_space(struct cxl_context *ctx); 1051 int cxl_invalidate_all_psl9(struct cxl *adapter); 1052 int cxl_invalidate_all_psl8(struct cxl *adapter); 1053 irqreturn_t cxl_irq_psl9(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); 1054 irqreturn_t cxl_irq_psl8(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); 1055 irqreturn_t cxl_fail_irq_psl(struct cxl_afu *afu, struct cxl_irq_info *irq_info); 1056 int cxl_register_one_irq(struct cxl *adapter, irq_handler_t handler, 1057 void *cookie, irq_hw_number_t *dest_hwirq, 1058 unsigned int *dest_virq, const char *name); 1059 1060 int cxl_check_error(struct cxl_afu *afu); 1061 int cxl_afu_slbia(struct cxl_afu *afu); 1062 int cxl_data_cache_flush(struct cxl *adapter); 1063 int cxl_afu_disable(struct cxl_afu *afu); 1064 int cxl_psl_purge(struct cxl_afu *afu); 1065 int cxl_calc_capp_routing(struct pci_dev *dev, u64 *chipid, 1066 u32 *phb_index, u64 *capp_unit_id); 1067 int cxl_slot_is_switched(struct pci_dev *dev); 1068 int cxl_get_xsl9_dsnctl(u64 capp_unit_id, u64 *reg); 1069 u64 cxl_calculate_sr(bool master, bool kernel, bool real_mode, bool p9); 1070 1071 void cxl_native_irq_dump_regs_psl9(struct cxl_context *ctx); 1072 void cxl_native_irq_dump_regs_psl8(struct cxl_context *ctx); 1073 void cxl_native_err_irq_dump_regs_psl8(struct cxl *adapter); 1074 void cxl_native_err_irq_dump_regs_psl9(struct cxl *adapter); 1075 int cxl_pci_vphb_add(struct cxl_afu *afu); 1076 void cxl_pci_vphb_remove(struct cxl_afu *afu); 1077 void cxl_release_mapping(struct cxl_context *ctx); 1078 1079 extern struct pci_driver cxl_pci_driver; 1080 extern struct platform_driver cxl_of_driver; 1081 int afu_allocate_irqs(struct cxl_context *ctx, u32 count); 1082 1083 int afu_open(struct inode *inode, struct file *file); 1084 int afu_release(struct inode *inode, struct file *file); 1085 long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1086 int afu_mmap(struct file *file, struct vm_area_struct *vm); 1087 __poll_t afu_poll(struct file *file, struct poll_table_struct *poll); 1088 ssize_t afu_read(struct file *file, char __user *buf, size_t count, loff_t *off); 1089 extern const struct file_operations afu_fops; 1090 1091 struct cxl *cxl_guest_init_adapter(struct device_node *np, struct platform_device *dev); 1092 void cxl_guest_remove_adapter(struct cxl *adapter); 1093 int cxl_of_read_adapter_handle(struct cxl *adapter, struct device_node *np); 1094 int cxl_of_read_adapter_properties(struct cxl *adapter, struct device_node *np); 1095 ssize_t cxl_guest_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); 1096 ssize_t cxl_guest_read_afu_vpd(struct cxl_afu *afu, void *buf, size_t len); 1097 int cxl_guest_init_afu(struct cxl *adapter, int slice, struct device_node *afu_np); 1098 void cxl_guest_remove_afu(struct cxl_afu *afu); 1099 int cxl_of_read_afu_handle(struct cxl_afu *afu, struct device_node *afu_np); 1100 int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *afu_np); 1101 int cxl_guest_add_chardev(struct cxl *adapter); 1102 void cxl_guest_remove_chardev(struct cxl *adapter); 1103 void cxl_guest_reload_module(struct cxl *adapter); 1104 int cxl_of_probe(struct platform_device *pdev); 1105 1106 struct cxl_backend_ops { 1107 struct module *module; 1108 int (*adapter_reset)(struct cxl *adapter); 1109 int (*alloc_one_irq)(struct cxl *adapter); 1110 void (*release_one_irq)(struct cxl *adapter, int hwirq); 1111 int (*alloc_irq_ranges)(struct cxl_irq_ranges *irqs, 1112 struct cxl *adapter, unsigned int num); 1113 void (*release_irq_ranges)(struct cxl_irq_ranges *irqs, 1114 struct cxl *adapter); 1115 int (*setup_irq)(struct cxl *adapter, unsigned int hwirq, 1116 unsigned int virq); 1117 irqreturn_t (*handle_psl_slice_error)(struct cxl_context *ctx, 1118 u64 dsisr, u64 errstat); 1119 irqreturn_t (*psl_interrupt)(int irq, void *data); 1120 int (*ack_irq)(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask); 1121 void (*irq_wait)(struct cxl_context *ctx); 1122 int (*attach_process)(struct cxl_context *ctx, bool kernel, 1123 u64 wed, u64 amr); 1124 int (*detach_process)(struct cxl_context *ctx); 1125 void (*update_ivtes)(struct cxl_context *ctx); 1126 bool (*support_attributes)(const char *attr_name, enum cxl_attrs type); 1127 bool (*link_ok)(struct cxl *cxl, struct cxl_afu *afu); 1128 void (*release_afu)(struct device *dev); 1129 ssize_t (*afu_read_err_buffer)(struct cxl_afu *afu, char *buf, 1130 loff_t off, size_t count); 1131 int (*afu_check_and_enable)(struct cxl_afu *afu); 1132 int (*afu_activate_mode)(struct cxl_afu *afu, int mode); 1133 int (*afu_deactivate_mode)(struct cxl_afu *afu, int mode); 1134 int (*afu_reset)(struct cxl_afu *afu); 1135 int (*afu_cr_read8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 *val); 1136 int (*afu_cr_read16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 *val); 1137 int (*afu_cr_read32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 *val); 1138 int (*afu_cr_read64)(struct cxl_afu *afu, int cr_idx, u64 offset, u64 *val); 1139 int (*afu_cr_write8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 val); 1140 int (*afu_cr_write16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 val); 1141 int (*afu_cr_write32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 val); 1142 ssize_t (*read_adapter_vpd)(struct cxl *adapter, void *buf, size_t count); 1143 }; 1144 extern const struct cxl_backend_ops cxl_native_ops; 1145 extern const struct cxl_backend_ops cxl_guest_ops; 1146 extern const struct cxl_backend_ops *cxl_ops; 1147 1148 /* check if the given pci_dev is on the the cxl vphb bus */ 1149 bool cxl_pci_is_vphb_device(struct pci_dev *dev); 1150 1151 /* decode AFU error bits in the PSL register PSL_SERR_An */ 1152 void cxl_afu_decode_psl_serr(struct cxl_afu *afu, u64 serr); 1153 1154 /* 1155 * Increments the number of attached contexts on an adapter. 1156 * In case an adapter_context_lock is taken the return -EBUSY. 1157 */ 1158 int cxl_adapter_context_get(struct cxl *adapter); 1159 1160 /* Decrements the number of attached contexts on an adapter */ 1161 void cxl_adapter_context_put(struct cxl *adapter); 1162 1163 /* If no active contexts then prevents contexts from being attached */ 1164 int cxl_adapter_context_lock(struct cxl *adapter); 1165 1166 /* Unlock the contexts-lock if taken. Warn and force unlock otherwise */ 1167 void cxl_adapter_context_unlock(struct cxl *adapter); 1168 1169 /* Increases the reference count to "struct mm_struct" */ 1170 void cxl_context_mm_count_get(struct cxl_context *ctx); 1171 1172 /* Decrements the reference count to "struct mm_struct" */ 1173 void cxl_context_mm_count_put(struct cxl_context *ctx); 1174 1175 #endif 1176