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_DSNCTL = {0x0168}; 104 static const cxl_p1_reg_t CXL_PSL9_FIR1 = {0x0300}; 105 static const cxl_p1_reg_t CXL_PSL9_FIR2 = {0x0308}; 106 static const cxl_p1_reg_t CXL_PSL9_Timebase = {0x0310}; 107 static const cxl_p1_reg_t CXL_PSL9_DEBUG = {0x0320}; 108 static const cxl_p1_reg_t CXL_PSL9_FIR_CNTL = {0x0348}; 109 static const cxl_p1_reg_t CXL_PSL9_DSNDCTL = {0x0350}; 110 static const cxl_p1_reg_t CXL_PSL9_TB_CTLSTAT = {0x0340}; 111 static const cxl_p1_reg_t CXL_PSL9_TRACECFG = {0x0368}; 112 static const cxl_p1_reg_t CXL_PSL9_APCDEDALLOC = {0x0378}; 113 static const cxl_p1_reg_t CXL_PSL9_APCDEDTYPE = {0x0380}; 114 static const cxl_p1_reg_t CXL_PSL9_TNR_ADDR = {0x0388}; 115 static const cxl_p1_reg_t CXL_PSL9_GP_CT = {0x0398}; 116 static const cxl_p1_reg_t CXL_XSL9_IERAT = {0x0588}; 117 static const cxl_p1_reg_t CXL_XSL9_ILPP = {0x0590}; 118 119 /* 0x7F00:7FFF Reserved PCIe MSI-X Pending Bit Array area */ 120 /* 0x8000:FFFF Reserved PCIe MSI-X Table Area */ 121 122 /* PSL Slice Privilege 1 Memory Map */ 123 /* Configuration Area - CAIA 1&2 */ 124 static const cxl_p1n_reg_t CXL_PSL_SR_An = {0x00}; 125 static const cxl_p1n_reg_t CXL_PSL_LPID_An = {0x08}; 126 static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10}; 127 static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18}; 128 static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20}; 129 static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28}; 130 /* Memory Management and Lookaside Buffer Management - CAIA 1*/ 131 static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30}; 132 /* Memory Management and Lookaside Buffer Management - CAIA 1&2 */ 133 static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38}; 134 /* Pointer Area - CAIA 1&2 */ 135 static const cxl_p1n_reg_t CXL_HAURP_An = {0x80}; 136 static const cxl_p1n_reg_t CXL_PSL_SPAP_An = {0x88}; 137 static const cxl_p1n_reg_t CXL_PSL_LLCMD_An = {0x90}; 138 /* Control Area - CAIA 1&2 */ 139 static const cxl_p1n_reg_t CXL_PSL_SCNTL_An = {0xA0}; 140 static const cxl_p1n_reg_t CXL_PSL_CtxTime_An = {0xA8}; 141 static const cxl_p1n_reg_t CXL_PSL_IVTE_Offset_An = {0xB0}; 142 static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8}; 143 /* 0xC0:FF Implementation Dependent Area - CAIA 1&2 */ 144 static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0}; 145 static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8}; 146 /* 0xC0:FF Implementation Dependent Area - CAIA 1 */ 147 static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0}; 148 static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8}; 149 static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0}; 150 static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8}; 151 152 /* PSL Slice Privilege 2 Memory Map */ 153 /* Configuration and Control Area - CAIA 1&2 */ 154 static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000}; 155 static const cxl_p2n_reg_t CXL_CSRP_An = {0x008}; 156 /* Configuration and Control Area - CAIA 1 */ 157 static const cxl_p2n_reg_t CXL_AURP0_An = {0x010}; 158 static const cxl_p2n_reg_t CXL_AURP1_An = {0x018}; 159 static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020}; 160 static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028}; 161 /* Configuration and Control Area - CAIA 1 */ 162 static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030}; 163 /* Segment Lookaside Buffer Management - CAIA 1 */ 164 static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040}; 165 static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048}; 166 static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050}; 167 /* Interrupt Registers - CAIA 1&2 */ 168 static const cxl_p2n_reg_t CXL_PSL_DSISR_An = {0x060}; 169 static const cxl_p2n_reg_t CXL_PSL_DAR_An = {0x068}; 170 static const cxl_p2n_reg_t CXL_PSL_DSR_An = {0x070}; 171 static const cxl_p2n_reg_t CXL_PSL_TFC_An = {0x078}; 172 static const cxl_p2n_reg_t CXL_PSL_PEHandle_An = {0x080}; 173 static const cxl_p2n_reg_t CXL_PSL_ErrStat_An = {0x088}; 174 /* AFU Registers - CAIA 1&2 */ 175 static const cxl_p2n_reg_t CXL_AFU_Cntl_An = {0x090}; 176 static const cxl_p2n_reg_t CXL_AFU_ERR_An = {0x098}; 177 /* Work Element Descriptor - CAIA 1&2 */ 178 static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; 179 /* 0x0C0:FFF Implementation Dependent Area */ 180 181 #define CXL_PSL_SPAP_Addr 0x0ffffffffffff000ULL 182 #define CXL_PSL_SPAP_Size 0x0000000000000ff0ULL 183 #define CXL_PSL_SPAP_Size_Shift 4 184 #define CXL_PSL_SPAP_V 0x0000000000000001ULL 185 186 /****** CXL_PSL_Control ****************************************************/ 187 #define CXL_PSL_Control_tb (0x1ull << (63-63)) 188 #define CXL_PSL_Control_Fr (0x1ull << (63-31)) 189 #define CXL_PSL_Control_Fs_MASK (0x3ull << (63-29)) 190 #define CXL_PSL_Control_Fs_Complete (0x3ull << (63-29)) 191 192 /****** CXL_PSL_DLCNTL *****************************************************/ 193 #define CXL_PSL_DLCNTL_D (0x1ull << (63-28)) 194 #define CXL_PSL_DLCNTL_C (0x1ull << (63-29)) 195 #define CXL_PSL_DLCNTL_E (0x1ull << (63-30)) 196 #define CXL_PSL_DLCNTL_S (0x1ull << (63-31)) 197 #define CXL_PSL_DLCNTL_CE (CXL_PSL_DLCNTL_C | CXL_PSL_DLCNTL_E) 198 #define CXL_PSL_DLCNTL_DCES (CXL_PSL_DLCNTL_D | CXL_PSL_DLCNTL_CE | CXL_PSL_DLCNTL_S) 199 200 /****** CXL_PSL_SR_An ******************************************************/ 201 #define CXL_PSL_SR_An_SF MSR_SF /* 64bit */ 202 #define CXL_PSL_SR_An_TA (1ull << (63-1)) /* Tags active, GA1: 0 */ 203 #define CXL_PSL_SR_An_HV MSR_HV /* Hypervisor, GA1: 0 */ 204 #define CXL_PSL_SR_An_XLAT_hpt (0ull << (63-6))/* Hashed page table (HPT) mode */ 205 #define CXL_PSL_SR_An_XLAT_roh (2ull << (63-6))/* Radix on HPT mode */ 206 #define CXL_PSL_SR_An_XLAT_ror (3ull << (63-6))/* Radix on Radix mode */ 207 #define CXL_PSL_SR_An_BOT (1ull << (63-10)) /* Use the in-memory segment table */ 208 #define CXL_PSL_SR_An_PR MSR_PR /* Problem state, GA1: 1 */ 209 #define CXL_PSL_SR_An_ISL (1ull << (63-53)) /* Ignore Segment Large Page */ 210 #define CXL_PSL_SR_An_TC (1ull << (63-54)) /* Page Table secondary hash */ 211 #define CXL_PSL_SR_An_US (1ull << (63-56)) /* User state, GA1: X */ 212 #define CXL_PSL_SR_An_SC (1ull << (63-58)) /* Segment Table secondary hash */ 213 #define CXL_PSL_SR_An_R MSR_DR /* Relocate, GA1: 1 */ 214 #define CXL_PSL_SR_An_MP (1ull << (63-62)) /* Master Process */ 215 #define CXL_PSL_SR_An_LE (1ull << (63-63)) /* Little Endian */ 216 217 /****** CXL_PSL_ID_An ****************************************************/ 218 #define CXL_PSL_ID_An_F (1ull << (63-31)) 219 #define CXL_PSL_ID_An_L (1ull << (63-30)) 220 221 /****** CXL_PSL_SERR_An ****************************************************/ 222 #define CXL_PSL_SERR_An_afuto (1ull << (63-0)) 223 #define CXL_PSL_SERR_An_afudis (1ull << (63-1)) 224 #define CXL_PSL_SERR_An_afuov (1ull << (63-2)) 225 #define CXL_PSL_SERR_An_badsrc (1ull << (63-3)) 226 #define CXL_PSL_SERR_An_badctx (1ull << (63-4)) 227 #define CXL_PSL_SERR_An_llcmdis (1ull << (63-5)) 228 #define CXL_PSL_SERR_An_llcmdto (1ull << (63-6)) 229 #define CXL_PSL_SERR_An_afupar (1ull << (63-7)) 230 #define CXL_PSL_SERR_An_afudup (1ull << (63-8)) 231 #define CXL_PSL_SERR_An_IRQS ( \ 232 CXL_PSL_SERR_An_afuto | CXL_PSL_SERR_An_afudis | CXL_PSL_SERR_An_afuov | \ 233 CXL_PSL_SERR_An_badsrc | CXL_PSL_SERR_An_badctx | CXL_PSL_SERR_An_llcmdis | \ 234 CXL_PSL_SERR_An_llcmdto | CXL_PSL_SERR_An_afupar | CXL_PSL_SERR_An_afudup) 235 #define CXL_PSL_SERR_An_afuto_mask (1ull << (63-32)) 236 #define CXL_PSL_SERR_An_afudis_mask (1ull << (63-33)) 237 #define CXL_PSL_SERR_An_afuov_mask (1ull << (63-34)) 238 #define CXL_PSL_SERR_An_badsrc_mask (1ull << (63-35)) 239 #define CXL_PSL_SERR_An_badctx_mask (1ull << (63-36)) 240 #define CXL_PSL_SERR_An_llcmdis_mask (1ull << (63-37)) 241 #define CXL_PSL_SERR_An_llcmdto_mask (1ull << (63-38)) 242 #define CXL_PSL_SERR_An_afupar_mask (1ull << (63-39)) 243 #define CXL_PSL_SERR_An_afudup_mask (1ull << (63-40)) 244 #define CXL_PSL_SERR_An_IRQ_MASKS ( \ 245 CXL_PSL_SERR_An_afuto_mask | CXL_PSL_SERR_An_afudis_mask | CXL_PSL_SERR_An_afuov_mask | \ 246 CXL_PSL_SERR_An_badsrc_mask | CXL_PSL_SERR_An_badctx_mask | CXL_PSL_SERR_An_llcmdis_mask | \ 247 CXL_PSL_SERR_An_llcmdto_mask | CXL_PSL_SERR_An_afupar_mask | CXL_PSL_SERR_An_afudup_mask) 248 249 #define CXL_PSL_SERR_An_AE (1ull << (63-30)) 250 251 /****** CXL_PSL_SCNTL_An ****************************************************/ 252 #define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) 253 /* Programming Modes: */ 254 #define CXL_PSL_SCNTL_An_PM_MASK (0xffffull << (63-31)) 255 #define CXL_PSL_SCNTL_An_PM_Shared (0x0000ull << (63-31)) 256 #define CXL_PSL_SCNTL_An_PM_OS (0x0001ull << (63-31)) 257 #define CXL_PSL_SCNTL_An_PM_Process (0x0002ull << (63-31)) 258 #define CXL_PSL_SCNTL_An_PM_AFU (0x0004ull << (63-31)) 259 #define CXL_PSL_SCNTL_An_PM_AFU_PBT (0x0104ull << (63-31)) 260 /* Purge Status (ro) */ 261 #define CXL_PSL_SCNTL_An_Ps_MASK (0x3ull << (63-39)) 262 #define CXL_PSL_SCNTL_An_Ps_Pending (0x1ull << (63-39)) 263 #define CXL_PSL_SCNTL_An_Ps_Complete (0x3ull << (63-39)) 264 /* Purge */ 265 #define CXL_PSL_SCNTL_An_Pc (0x1ull << (63-48)) 266 /* Suspend Status (ro) */ 267 #define CXL_PSL_SCNTL_An_Ss_MASK (0x3ull << (63-55)) 268 #define CXL_PSL_SCNTL_An_Ss_Pending (0x1ull << (63-55)) 269 #define CXL_PSL_SCNTL_An_Ss_Complete (0x3ull << (63-55)) 270 /* Suspend Control */ 271 #define CXL_PSL_SCNTL_An_Sc (0x1ull << (63-63)) 272 273 /* AFU Slice Enable Status (ro) */ 274 #define CXL_AFU_Cntl_An_ES_MASK (0x7ull << (63-2)) 275 #define CXL_AFU_Cntl_An_ES_Disabled (0x0ull << (63-2)) 276 #define CXL_AFU_Cntl_An_ES_Enabled (0x4ull << (63-2)) 277 /* AFU Slice Enable */ 278 #define CXL_AFU_Cntl_An_E (0x1ull << (63-3)) 279 /* AFU Slice Reset status (ro) */ 280 #define CXL_AFU_Cntl_An_RS_MASK (0x3ull << (63-5)) 281 #define CXL_AFU_Cntl_An_RS_Pending (0x1ull << (63-5)) 282 #define CXL_AFU_Cntl_An_RS_Complete (0x2ull << (63-5)) 283 /* AFU Slice Reset */ 284 #define CXL_AFU_Cntl_An_RA (0x1ull << (63-7)) 285 286 /****** CXL_SSTP0/1_An ******************************************************/ 287 /* These top bits are for the segment that CONTAINS the segment table */ 288 #define CXL_SSTP0_An_B_SHIFT SLB_VSID_SSIZE_SHIFT 289 #define CXL_SSTP0_An_KS (1ull << (63-2)) 290 #define CXL_SSTP0_An_KP (1ull << (63-3)) 291 #define CXL_SSTP0_An_N (1ull << (63-4)) 292 #define CXL_SSTP0_An_L (1ull << (63-5)) 293 #define CXL_SSTP0_An_C (1ull << (63-6)) 294 #define CXL_SSTP0_An_TA (1ull << (63-7)) 295 #define CXL_SSTP0_An_LP_SHIFT (63-9) /* 2 Bits */ 296 /* And finally, the virtual address & size of the segment table: */ 297 #define CXL_SSTP0_An_SegTableSize_SHIFT (63-31) /* 12 Bits */ 298 #define CXL_SSTP0_An_SegTableSize_MASK \ 299 (((1ull << 12) - 1) << CXL_SSTP0_An_SegTableSize_SHIFT) 300 #define CXL_SSTP0_An_STVA_U_MASK ((1ull << (63-49))-1) 301 #define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1)) 302 #define CXL_SSTP1_An_V (1ull << (63-63)) 303 304 /****** CXL_PSL_SLBIE_[An] - CAIA 1 **************************************************/ 305 /* write: */ 306 #define CXL_SLBIE_C PPC_BIT(36) /* Class */ 307 #define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */ 308 #define CXL_SLBIE_SS_SHIFT PPC_BITLSHIFT(38) 309 #define CXL_SLBIE_TA PPC_BIT(38) /* Tags Active */ 310 /* read: */ 311 #define CXL_SLBIE_MAX PPC_BITMASK(24, 31) 312 #define CXL_SLBIE_PENDING PPC_BITMASK(56, 63) 313 314 /****** Common to all CXL_TLBIA/SLBIA_[An] - CAIA 1 **********************************/ 315 #define CXL_TLB_SLB_P (1ull) /* Pending (read) */ 316 317 /****** Common to all CXL_TLB/SLB_IA/IE_[An] registers - CAIA 1 **********************/ 318 #define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */ 319 #define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */ 320 #define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */ 321 322 /****** CXL_PSL_AFUSEL ******************************************************/ 323 #define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */ 324 325 /****** CXL_PSL_DSISR_An - CAIA 1 ****************************************************/ 326 #define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */ 327 #define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */ 328 #define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */ 329 #define CXL_PSL_DSISR_An_UR (1ull << (63-3)) /* AURP PTE not found */ 330 #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) 331 #define CXL_PSL_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ 332 #define CXL_PSL_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ 333 #define CXL_PSL_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ 334 #define CXL_PSL_DSISR_PENDING (CXL_PSL_DSISR_TRANS | CXL_PSL_DSISR_An_PE | CXL_PSL_DSISR_An_AE | CXL_PSL_DSISR_An_OC) 335 /* NOTE: Bits 32:63 are undefined if DSISR[DS] = 1 */ 336 #define CXL_PSL_DSISR_An_M DSISR_NOHPTE /* PTE not found */ 337 #define CXL_PSL_DSISR_An_P DSISR_PROTFAULT /* Storage protection violation */ 338 #define CXL_PSL_DSISR_An_A (1ull << (63-37)) /* AFU lock access to write through or cache inhibited storage */ 339 #define CXL_PSL_DSISR_An_S DSISR_ISSTORE /* Access was afu_wr or afu_zero */ 340 #define CXL_PSL_DSISR_An_K DSISR_KEYFAULT /* Access not permitted by virtual page class key protection */ 341 342 /****** CXL_PSL_DSISR_An - CAIA 2 ****************************************************/ 343 #define CXL_PSL9_DSISR_An_TF (1ull << (63-3)) /* Translation fault */ 344 #define CXL_PSL9_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ 345 #define CXL_PSL9_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ 346 #define CXL_PSL9_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ 347 #define CXL_PSL9_DSISR_An_S (1ull << (63-38)) /* TF for a write operation */ 348 #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) 349 /* 350 * NOTE: Bits 56:63 (Checkout Response Status) are valid when DSISR_An[TF] = 1 351 * Status (0:7) Encoding 352 */ 353 #define CXL_PSL9_DSISR_An_CO_MASK 0x00000000000000ffULL 354 #define CXL_PSL9_DSISR_An_SF 0x0000000000000080ULL /* Segment Fault 0b10000000 */ 355 #define CXL_PSL9_DSISR_An_PF_SLR 0x0000000000000088ULL /* PTE not found (Single Level Radix) 0b10001000 */ 356 #define CXL_PSL9_DSISR_An_PF_RGC 0x000000000000008CULL /* PTE not found (Radix Guest (child)) 0b10001100 */ 357 #define CXL_PSL9_DSISR_An_PF_RGP 0x0000000000000090ULL /* PTE not found (Radix Guest (parent)) 0b10010000 */ 358 #define CXL_PSL9_DSISR_An_PF_HRH 0x0000000000000094ULL /* PTE not found (HPT/Radix Host) 0b10010100 */ 359 #define CXL_PSL9_DSISR_An_PF_STEG 0x000000000000009CULL /* PTE not found (STEG VA) 0b10011100 */ 360 #define CXL_PSL9_DSISR_An_URTCH 0x00000000000000B4ULL /* Unsupported Radix Tree Configuration 0b10110100 */ 361 362 /****** CXL_PSL_TFC_An ******************************************************/ 363 #define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */ 364 #define CXL_PSL_TFC_An_C (1ull << (63-29)) /* Continue (abort transaction) */ 365 #define CXL_PSL_TFC_An_AE (1ull << (63-30)) /* Restart PSL with address error */ 366 #define CXL_PSL_TFC_An_R (1ull << (63-31)) /* Restart PSL transaction */ 367 368 /****** CXL_XSL9_IERAT_ERAT - CAIA 2 **********************************/ 369 #define CXL_XSL9_IERAT_MLPID (1ull << (63-0)) /* Match LPID */ 370 #define CXL_XSL9_IERAT_MPID (1ull << (63-1)) /* Match PID */ 371 #define CXL_XSL9_IERAT_PRS (1ull << (63-4)) /* PRS bit for Radix invalidations */ 372 #define CXL_XSL9_IERAT_INVR (1ull << (63-3)) /* Invalidate Radix */ 373 #define CXL_XSL9_IERAT_IALL (1ull << (63-8)) /* Invalidate All */ 374 #define CXL_XSL9_IERAT_IINPROG (1ull << (63-63)) /* Invalidate in progress */ 375 376 /* cxl_process_element->software_status */ 377 #define CXL_PE_SOFTWARE_STATE_V (1ul << (31 - 0)) /* Valid */ 378 #define CXL_PE_SOFTWARE_STATE_C (1ul << (31 - 29)) /* Complete */ 379 #define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */ 380 #define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */ 381 382 /****** CXL_PSL_RXCTL_An (Implementation Specific) ************************** 383 * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to 384 * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x 385 * of the hang pulse frequency. 386 */ 387 #define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL 388 389 /* SPA->sw_command_status */ 390 #define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL 391 #define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL 392 #define CXL_SPA_SW_CMD_REMOVE 0x0002000000000000ULL 393 #define CXL_SPA_SW_CMD_SUSPEND 0x0003000000000000ULL 394 #define CXL_SPA_SW_CMD_RESUME 0x0004000000000000ULL 395 #define CXL_SPA_SW_CMD_ADD 0x0005000000000000ULL 396 #define CXL_SPA_SW_CMD_UPDATE 0x0006000000000000ULL 397 #define CXL_SPA_SW_STATE_MASK 0x0000ffff00000000ULL 398 #define CXL_SPA_SW_STATE_TERMINATED 0x0000000100000000ULL 399 #define CXL_SPA_SW_STATE_REMOVED 0x0000000200000000ULL 400 #define CXL_SPA_SW_STATE_SUSPENDED 0x0000000300000000ULL 401 #define CXL_SPA_SW_STATE_RESUMED 0x0000000400000000ULL 402 #define CXL_SPA_SW_STATE_ADDED 0x0000000500000000ULL 403 #define CXL_SPA_SW_STATE_UPDATED 0x0000000600000000ULL 404 #define CXL_SPA_SW_PSL_ID_MASK 0x00000000ffff0000ULL 405 #define CXL_SPA_SW_LINK_MASK 0x000000000000ffffULL 406 407 #define CXL_MAX_SLICES 4 408 #define MAX_AFU_MMIO_REGS 3 409 410 #define CXL_MODE_TIME_SLICED 0x4 411 #define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) 412 413 #define CXL_DEV_MINORS 13 /* 1 control + 4 AFUs * 3 (dedicated/master/shared) */ 414 #define CXL_CARD_MINOR(adapter) (adapter->adapter_num * CXL_DEV_MINORS) 415 #define CXL_DEVT_ADAPTER(dev) (MINOR(dev) / CXL_DEV_MINORS) 416 417 enum cxl_context_status { 418 CLOSED, 419 OPENED, 420 STARTED 421 }; 422 423 enum prefault_modes { 424 CXL_PREFAULT_NONE, 425 CXL_PREFAULT_WED, 426 CXL_PREFAULT_ALL, 427 }; 428 429 enum cxl_attrs { 430 CXL_ADAPTER_ATTRS, 431 CXL_AFU_MASTER_ATTRS, 432 CXL_AFU_ATTRS, 433 }; 434 435 struct cxl_sste { 436 __be64 esid_data; 437 __be64 vsid_data; 438 }; 439 440 #define to_cxl_adapter(d) container_of(d, struct cxl, dev) 441 #define to_cxl_afu(d) container_of(d, struct cxl_afu, dev) 442 443 struct cxl_afu_native { 444 void __iomem *p1n_mmio; 445 void __iomem *afu_desc_mmio; 446 irq_hw_number_t psl_hwirq; 447 unsigned int psl_virq; 448 struct mutex spa_mutex; 449 /* 450 * Only the first part of the SPA is used for the process element 451 * linked list. The only other part that software needs to worry about 452 * is sw_command_status, which we store a separate pointer to. 453 * Everything else in the SPA is only used by hardware 454 */ 455 struct cxl_process_element *spa; 456 __be64 *sw_command_status; 457 unsigned int spa_size; 458 int spa_order; 459 int spa_max_procs; 460 u64 pp_offset; 461 }; 462 463 struct cxl_afu_guest { 464 struct cxl_afu *parent; 465 u64 handle; 466 phys_addr_t p2n_phys; 467 u64 p2n_size; 468 int max_ints; 469 bool handle_err; 470 struct delayed_work work_err; 471 int previous_state; 472 }; 473 474 struct cxl_afu { 475 struct cxl_afu_native *native; 476 struct cxl_afu_guest *guest; 477 irq_hw_number_t serr_hwirq; 478 unsigned int serr_virq; 479 char *psl_irq_name; 480 char *err_irq_name; 481 void __iomem *p2n_mmio; 482 phys_addr_t psn_phys; 483 u64 pp_size; 484 485 struct cxl *adapter; 486 struct device dev; 487 struct cdev afu_cdev_s, afu_cdev_m, afu_cdev_d; 488 struct device *chardev_s, *chardev_m, *chardev_d; 489 struct idr contexts_idr; 490 struct dentry *debugfs; 491 struct mutex contexts_lock; 492 spinlock_t afu_cntl_lock; 493 494 /* -1: AFU deconfigured/locked, >= 0: number of readers */ 495 atomic_t configured_state; 496 497 /* AFU error buffer fields and bin attribute for sysfs */ 498 u64 eb_len, eb_offset; 499 struct bin_attribute attr_eb; 500 501 /* pointer to the vphb */ 502 struct pci_controller *phb; 503 504 int pp_irqs; 505 int irqs_max; 506 int num_procs; 507 int max_procs_virtualised; 508 int slice; 509 int modes_supported; 510 int current_mode; 511 int crs_num; 512 u64 crs_len; 513 u64 crs_offset; 514 struct list_head crs; 515 enum prefault_modes prefault_mode; 516 bool psa; 517 bool pp_psa; 518 bool enabled; 519 }; 520 521 522 struct cxl_irq_name { 523 struct list_head list; 524 char *name; 525 }; 526 527 struct irq_avail { 528 irq_hw_number_t offset; 529 irq_hw_number_t range; 530 unsigned long *bitmap; 531 }; 532 533 /* 534 * This is a cxl context. If the PSL is in dedicated mode, there will be one 535 * of these per AFU. If in AFU directed there can be lots of these. 536 */ 537 struct cxl_context { 538 struct cxl_afu *afu; 539 540 /* Problem state MMIO */ 541 phys_addr_t psn_phys; 542 u64 psn_size; 543 544 /* Used to unmap any mmaps when force detaching */ 545 struct address_space *mapping; 546 struct mutex mapping_lock; 547 struct page *ff_page; 548 bool mmio_err_ff; 549 bool kernelapi; 550 551 spinlock_t sste_lock; /* Protects segment table entries */ 552 struct cxl_sste *sstp; 553 u64 sstp0, sstp1; 554 unsigned int sst_size, sst_lru; 555 556 wait_queue_head_t wq; 557 /* use mm context associated with this pid for ds faults */ 558 struct pid *pid; 559 spinlock_t lock; /* Protects pending_irq_mask, pending_fault and fault_addr */ 560 /* Only used in PR mode */ 561 u64 process_token; 562 563 /* driver private data */ 564 void *priv; 565 566 unsigned long *irq_bitmap; /* Accessed from IRQ context */ 567 struct cxl_irq_ranges irqs; 568 struct list_head irq_names; 569 u64 fault_addr; 570 u64 fault_dsisr; 571 u64 afu_err; 572 573 /* 574 * This status and it's lock pretects start and detach context 575 * from racing. It also prevents detach from racing with 576 * itself 577 */ 578 enum cxl_context_status status; 579 struct mutex status_mutex; 580 581 582 /* XXX: Is it possible to need multiple work items at once? */ 583 struct work_struct fault_work; 584 u64 dsisr; 585 u64 dar; 586 587 struct cxl_process_element *elem; 588 589 /* 590 * pe is the process element handle, assigned by this driver when the 591 * context is initialized. 592 * 593 * external_pe is the PE shown outside of cxl. 594 * On bare-metal, pe=external_pe, because we decide what the handle is. 595 * In a guest, we only find out about the pe used by pHyp when the 596 * context is attached, and that's the value we want to report outside 597 * of cxl. 598 */ 599 int pe; 600 int external_pe; 601 602 u32 irq_count; 603 bool pe_inserted; 604 bool master; 605 bool kernel; 606 bool real_mode; 607 bool pending_irq; 608 bool pending_fault; 609 bool pending_afu_err; 610 611 /* Used by AFU drivers for driver specific event delivery */ 612 struct cxl_afu_driver_ops *afu_driver_ops; 613 atomic_t afu_driver_events; 614 615 struct rcu_head rcu; 616 617 /* 618 * Only used when more interrupts are allocated via 619 * pci_enable_msix_range than are supported in the default context, to 620 * use additional contexts to overcome the limitation. i.e. Mellanox 621 * CX4 only: 622 */ 623 struct list_head extra_irq_contexts; 624 625 struct mm_struct *mm; 626 }; 627 628 struct cxl_irq_info; 629 630 struct cxl_service_layer_ops { 631 int (*adapter_regs_init)(struct cxl *adapter, struct pci_dev *dev); 632 int (*invalidate_all)(struct cxl *adapter); 633 int (*afu_regs_init)(struct cxl_afu *afu); 634 int (*sanitise_afu_regs)(struct cxl_afu *afu); 635 int (*register_serr_irq)(struct cxl_afu *afu); 636 void (*release_serr_irq)(struct cxl_afu *afu); 637 irqreturn_t (*handle_interrupt)(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); 638 irqreturn_t (*fail_irq)(struct cxl_afu *afu, struct cxl_irq_info *irq_info); 639 int (*activate_dedicated_process)(struct cxl_afu *afu); 640 int (*attach_afu_directed)(struct cxl_context *ctx, u64 wed, u64 amr); 641 int (*attach_dedicated_process)(struct cxl_context *ctx, u64 wed, u64 amr); 642 void (*update_dedicated_ivtes)(struct cxl_context *ctx); 643 void (*debugfs_add_adapter_regs)(struct cxl *adapter, struct dentry *dir); 644 void (*debugfs_add_afu_regs)(struct cxl_afu *afu, struct dentry *dir); 645 void (*psl_irq_dump_registers)(struct cxl_context *ctx); 646 void (*err_irq_dump_registers)(struct cxl *adapter); 647 void (*debugfs_stop_trace)(struct cxl *adapter); 648 void (*write_timebase_ctrl)(struct cxl *adapter); 649 u64 (*timebase_read)(struct cxl *adapter); 650 int capi_mode; 651 bool needs_reset_before_disable; 652 }; 653 654 struct cxl_native { 655 u64 afu_desc_off; 656 u64 afu_desc_size; 657 void __iomem *p1_mmio; 658 void __iomem *p2_mmio; 659 irq_hw_number_t err_hwirq; 660 unsigned int err_virq; 661 u64 ps_off; 662 const struct cxl_service_layer_ops *sl_ops; 663 }; 664 665 struct cxl_guest { 666 struct platform_device *pdev; 667 int irq_nranges; 668 struct cdev cdev; 669 irq_hw_number_t irq_base_offset; 670 struct irq_avail *irq_avail; 671 spinlock_t irq_alloc_lock; 672 u64 handle; 673 char *status; 674 u16 vendor; 675 u16 device; 676 u16 subsystem_vendor; 677 u16 subsystem; 678 }; 679 680 struct cxl { 681 struct cxl_native *native; 682 struct cxl_guest *guest; 683 spinlock_t afu_list_lock; 684 struct cxl_afu *afu[CXL_MAX_SLICES]; 685 struct device dev; 686 struct dentry *trace; 687 struct dentry *psl_err_chk; 688 struct dentry *debugfs; 689 char *irq_name; 690 struct bin_attribute cxl_attr; 691 int adapter_num; 692 int user_irqs; 693 int min_pe; 694 u64 ps_size; 695 u16 psl_rev; 696 u16 base_image; 697 u8 vsec_status; 698 u8 caia_major; 699 u8 caia_minor; 700 u8 slices; 701 bool user_image_loaded; 702 bool perst_loads_image; 703 bool perst_select_user; 704 bool perst_same_image; 705 bool psl_timebase_synced; 706 707 /* 708 * number of contexts mapped on to this card. Possible values are: 709 * >0: Number of contexts mapped and new one can be mapped. 710 * 0: No active contexts and new ones can be mapped. 711 * -1: No contexts mapped and new ones cannot be mapped. 712 */ 713 atomic_t contexts_num; 714 }; 715 716 int cxl_pci_alloc_one_irq(struct cxl *adapter); 717 void cxl_pci_release_one_irq(struct cxl *adapter, int hwirq); 718 int cxl_pci_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num); 719 void cxl_pci_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter); 720 int cxl_pci_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq); 721 int cxl_update_image_control(struct cxl *adapter); 722 int cxl_pci_reset(struct cxl *adapter); 723 void cxl_pci_release_afu(struct device *dev); 724 ssize_t cxl_pci_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); 725 726 /* common == phyp + powernv - CAIA 1&2 */ 727 struct cxl_process_element_common { 728 __be32 tid; 729 __be32 pid; 730 __be64 csrp; 731 union { 732 struct { 733 __be64 aurp0; 734 __be64 aurp1; 735 __be64 sstp0; 736 __be64 sstp1; 737 } psl8; /* CAIA 1 */ 738 struct { 739 u8 reserved2[8]; 740 u8 reserved3[8]; 741 u8 reserved4[8]; 742 u8 reserved5[8]; 743 } psl9; /* CAIA 2 */ 744 } u; 745 __be64 amr; 746 u8 reserved6[4]; 747 __be64 wed; 748 } __packed; 749 750 /* just powernv - CAIA 1&2 */ 751 struct cxl_process_element { 752 __be64 sr; 753 __be64 SPOffset; 754 union { 755 __be64 sdr; /* CAIA 1 */ 756 u8 reserved1[8]; /* CAIA 2 */ 757 } u; 758 __be64 haurp; 759 __be32 ctxtime; 760 __be16 ivte_offsets[4]; 761 __be16 ivte_ranges[4]; 762 __be32 lpid; 763 struct cxl_process_element_common common; 764 __be32 software_state; 765 } __packed; 766 767 static inline bool cxl_adapter_link_ok(struct cxl *cxl, struct cxl_afu *afu) 768 { 769 struct pci_dev *pdev; 770 771 if (cpu_has_feature(CPU_FTR_HVMODE)) { 772 pdev = to_pci_dev(cxl->dev.parent); 773 return !pci_channel_offline(pdev); 774 } 775 return true; 776 } 777 778 static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg) 779 { 780 WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); 781 return cxl->native->p1_mmio + cxl_reg_off(reg); 782 } 783 784 static inline void cxl_p1_write(struct cxl *cxl, cxl_p1_reg_t reg, u64 val) 785 { 786 if (likely(cxl_adapter_link_ok(cxl, NULL))) 787 out_be64(_cxl_p1_addr(cxl, reg), val); 788 } 789 790 static inline u64 cxl_p1_read(struct cxl *cxl, cxl_p1_reg_t reg) 791 { 792 if (likely(cxl_adapter_link_ok(cxl, NULL))) 793 return in_be64(_cxl_p1_addr(cxl, reg)); 794 else 795 return ~0ULL; 796 } 797 798 static inline void __iomem *_cxl_p1n_addr(struct cxl_afu *afu, cxl_p1n_reg_t reg) 799 { 800 WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); 801 return afu->native->p1n_mmio + cxl_reg_off(reg); 802 } 803 804 static inline void cxl_p1n_write(struct cxl_afu *afu, cxl_p1n_reg_t reg, u64 val) 805 { 806 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 807 out_be64(_cxl_p1n_addr(afu, reg), val); 808 } 809 810 static inline u64 cxl_p1n_read(struct cxl_afu *afu, cxl_p1n_reg_t reg) 811 { 812 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 813 return in_be64(_cxl_p1n_addr(afu, reg)); 814 else 815 return ~0ULL; 816 } 817 818 static inline void __iomem *_cxl_p2n_addr(struct cxl_afu *afu, cxl_p2n_reg_t reg) 819 { 820 return afu->p2n_mmio + cxl_reg_off(reg); 821 } 822 823 static inline void cxl_p2n_write(struct cxl_afu *afu, cxl_p2n_reg_t reg, u64 val) 824 { 825 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 826 out_be64(_cxl_p2n_addr(afu, reg), val); 827 } 828 829 static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg) 830 { 831 if (likely(cxl_adapter_link_ok(afu->adapter, afu))) 832 return in_be64(_cxl_p2n_addr(afu, reg)); 833 else 834 return ~0ULL; 835 } 836 837 static inline bool cxl_is_power8(void) 838 { 839 if ((pvr_version_is(PVR_POWER8E)) || 840 (pvr_version_is(PVR_POWER8NVL)) || 841 (pvr_version_is(PVR_POWER8))) 842 return true; 843 return false; 844 } 845 846 static inline bool cxl_is_power9(void) 847 { 848 if (pvr_version_is(PVR_POWER9)) 849 return true; 850 return false; 851 } 852 853 static inline bool cxl_is_power9_dd1(void) 854 { 855 if ((pvr_version_is(PVR_POWER9)) && 856 cpu_has_feature(CPU_FTR_POWER9_DD1)) 857 return true; 858 return false; 859 } 860 861 ssize_t cxl_pci_afu_read_err_buffer(struct cxl_afu *afu, char *buf, 862 loff_t off, size_t count); 863 864 /* Internal functions wrapped in cxl_base to allow PHB to call them */ 865 bool _cxl_pci_associate_default_context(struct pci_dev *dev, struct cxl_afu *afu); 866 void _cxl_pci_disable_device(struct pci_dev *dev); 867 int _cxl_next_msi_hwirq(struct pci_dev *pdev, struct cxl_context **ctx, int *afu_irq); 868 int _cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type); 869 void _cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev); 870 871 struct cxl_calls { 872 void (*cxl_slbia)(struct mm_struct *mm); 873 bool (*cxl_pci_associate_default_context)(struct pci_dev *dev, struct cxl_afu *afu); 874 void (*cxl_pci_disable_device)(struct pci_dev *dev); 875 int (*cxl_next_msi_hwirq)(struct pci_dev *pdev, struct cxl_context **ctx, int *afu_irq); 876 int (*cxl_cx4_setup_msi_irqs)(struct pci_dev *pdev, int nvec, int type); 877 void (*cxl_cx4_teardown_msi_irqs)(struct pci_dev *pdev); 878 879 struct module *owner; 880 }; 881 int register_cxl_calls(struct cxl_calls *calls); 882 void unregister_cxl_calls(struct cxl_calls *calls); 883 int cxl_update_properties(struct device_node *dn, struct property *new_prop); 884 885 void cxl_remove_adapter_nr(struct cxl *adapter); 886 887 void cxl_release_spa(struct cxl_afu *afu); 888 889 dev_t cxl_get_dev(void); 890 int cxl_file_init(void); 891 void cxl_file_exit(void); 892 int cxl_register_adapter(struct cxl *adapter); 893 int cxl_register_afu(struct cxl_afu *afu); 894 int cxl_chardev_d_afu_add(struct cxl_afu *afu); 895 int cxl_chardev_m_afu_add(struct cxl_afu *afu); 896 int cxl_chardev_s_afu_add(struct cxl_afu *afu); 897 void cxl_chardev_afu_remove(struct cxl_afu *afu); 898 899 void cxl_context_detach_all(struct cxl_afu *afu); 900 void cxl_context_free(struct cxl_context *ctx); 901 void cxl_context_detach(struct cxl_context *ctx); 902 903 int cxl_sysfs_adapter_add(struct cxl *adapter); 904 void cxl_sysfs_adapter_remove(struct cxl *adapter); 905 int cxl_sysfs_afu_add(struct cxl_afu *afu); 906 void cxl_sysfs_afu_remove(struct cxl_afu *afu); 907 int cxl_sysfs_afu_m_add(struct cxl_afu *afu); 908 void cxl_sysfs_afu_m_remove(struct cxl_afu *afu); 909 910 struct cxl *cxl_alloc_adapter(void); 911 struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice); 912 int cxl_afu_select_best_mode(struct cxl_afu *afu); 913 914 int cxl_native_register_psl_irq(struct cxl_afu *afu); 915 void cxl_native_release_psl_irq(struct cxl_afu *afu); 916 int cxl_native_register_psl_err_irq(struct cxl *adapter); 917 void cxl_native_release_psl_err_irq(struct cxl *adapter); 918 int cxl_native_register_serr_irq(struct cxl_afu *afu); 919 void cxl_native_release_serr_irq(struct cxl_afu *afu); 920 int afu_register_irqs(struct cxl_context *ctx, u32 count); 921 void afu_release_irqs(struct cxl_context *ctx, void *cookie); 922 void afu_irq_name_free(struct cxl_context *ctx); 923 924 int cxl_attach_afu_directed_psl9(struct cxl_context *ctx, u64 wed, u64 amr); 925 int cxl_attach_afu_directed_psl8(struct cxl_context *ctx, u64 wed, u64 amr); 926 int cxl_activate_dedicated_process_psl9(struct cxl_afu *afu); 927 int cxl_activate_dedicated_process_psl8(struct cxl_afu *afu); 928 int cxl_attach_dedicated_process_psl9(struct cxl_context *ctx, u64 wed, u64 amr); 929 int cxl_attach_dedicated_process_psl8(struct cxl_context *ctx, u64 wed, u64 amr); 930 void cxl_update_dedicated_ivtes_psl9(struct cxl_context *ctx); 931 void cxl_update_dedicated_ivtes_psl8(struct cxl_context *ctx); 932 933 #ifdef CONFIG_DEBUG_FS 934 935 int cxl_debugfs_init(void); 936 void cxl_debugfs_exit(void); 937 int cxl_debugfs_adapter_add(struct cxl *adapter); 938 void cxl_debugfs_adapter_remove(struct cxl *adapter); 939 int cxl_debugfs_afu_add(struct cxl_afu *afu); 940 void cxl_debugfs_afu_remove(struct cxl_afu *afu); 941 void cxl_stop_trace_psl9(struct cxl *cxl); 942 void cxl_stop_trace_psl8(struct cxl *cxl); 943 void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir); 944 void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir); 945 void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir); 946 void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir); 947 void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir); 948 949 #else /* CONFIG_DEBUG_FS */ 950 951 static inline int __init cxl_debugfs_init(void) 952 { 953 return 0; 954 } 955 956 static inline void cxl_debugfs_exit(void) 957 { 958 } 959 960 static inline int cxl_debugfs_adapter_add(struct cxl *adapter) 961 { 962 return 0; 963 } 964 965 static inline void cxl_debugfs_adapter_remove(struct cxl *adapter) 966 { 967 } 968 969 static inline int cxl_debugfs_afu_add(struct cxl_afu *afu) 970 { 971 return 0; 972 } 973 974 static inline void cxl_debugfs_afu_remove(struct cxl_afu *afu) 975 { 976 } 977 978 static inline void cxl_stop_trace_psl9(struct cxl *cxl) 979 { 980 } 981 982 static inline void cxl_stop_trace_psl8(struct cxl *cxl) 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(struct cxl *adapter); 1074 int cxl_pci_vphb_add(struct cxl_afu *afu); 1075 void cxl_pci_vphb_remove(struct cxl_afu *afu); 1076 void cxl_release_mapping(struct cxl_context *ctx); 1077 1078 extern struct pci_driver cxl_pci_driver; 1079 extern struct platform_driver cxl_of_driver; 1080 int afu_allocate_irqs(struct cxl_context *ctx, u32 count); 1081 1082 int afu_open(struct inode *inode, struct file *file); 1083 int afu_release(struct inode *inode, struct file *file); 1084 long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 1085 int afu_mmap(struct file *file, struct vm_area_struct *vm); 1086 unsigned int afu_poll(struct file *file, struct poll_table_struct *poll); 1087 ssize_t afu_read(struct file *file, char __user *buf, size_t count, loff_t *off); 1088 extern const struct file_operations afu_fops; 1089 1090 struct cxl *cxl_guest_init_adapter(struct device_node *np, struct platform_device *dev); 1091 void cxl_guest_remove_adapter(struct cxl *adapter); 1092 int cxl_of_read_adapter_handle(struct cxl *adapter, struct device_node *np); 1093 int cxl_of_read_adapter_properties(struct cxl *adapter, struct device_node *np); 1094 ssize_t cxl_guest_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); 1095 ssize_t cxl_guest_read_afu_vpd(struct cxl_afu *afu, void *buf, size_t len); 1096 int cxl_guest_init_afu(struct cxl *adapter, int slice, struct device_node *afu_np); 1097 void cxl_guest_remove_afu(struct cxl_afu *afu); 1098 int cxl_of_read_afu_handle(struct cxl_afu *afu, struct device_node *afu_np); 1099 int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *afu_np); 1100 int cxl_guest_add_chardev(struct cxl *adapter); 1101 void cxl_guest_remove_chardev(struct cxl *adapter); 1102 void cxl_guest_reload_module(struct cxl *adapter); 1103 int cxl_of_probe(struct platform_device *pdev); 1104 1105 struct cxl_backend_ops { 1106 struct module *module; 1107 int (*adapter_reset)(struct cxl *adapter); 1108 int (*alloc_one_irq)(struct cxl *adapter); 1109 void (*release_one_irq)(struct cxl *adapter, int hwirq); 1110 int (*alloc_irq_ranges)(struct cxl_irq_ranges *irqs, 1111 struct cxl *adapter, unsigned int num); 1112 void (*release_irq_ranges)(struct cxl_irq_ranges *irqs, 1113 struct cxl *adapter); 1114 int (*setup_irq)(struct cxl *adapter, unsigned int hwirq, 1115 unsigned int virq); 1116 irqreturn_t (*handle_psl_slice_error)(struct cxl_context *ctx, 1117 u64 dsisr, u64 errstat); 1118 irqreturn_t (*psl_interrupt)(int irq, void *data); 1119 int (*ack_irq)(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask); 1120 void (*irq_wait)(struct cxl_context *ctx); 1121 int (*attach_process)(struct cxl_context *ctx, bool kernel, 1122 u64 wed, u64 amr); 1123 int (*detach_process)(struct cxl_context *ctx); 1124 void (*update_ivtes)(struct cxl_context *ctx); 1125 bool (*support_attributes)(const char *attr_name, enum cxl_attrs type); 1126 bool (*link_ok)(struct cxl *cxl, struct cxl_afu *afu); 1127 void (*release_afu)(struct device *dev); 1128 ssize_t (*afu_read_err_buffer)(struct cxl_afu *afu, char *buf, 1129 loff_t off, size_t count); 1130 int (*afu_check_and_enable)(struct cxl_afu *afu); 1131 int (*afu_activate_mode)(struct cxl_afu *afu, int mode); 1132 int (*afu_deactivate_mode)(struct cxl_afu *afu, int mode); 1133 int (*afu_reset)(struct cxl_afu *afu); 1134 int (*afu_cr_read8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 *val); 1135 int (*afu_cr_read16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 *val); 1136 int (*afu_cr_read32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 *val); 1137 int (*afu_cr_read64)(struct cxl_afu *afu, int cr_idx, u64 offset, u64 *val); 1138 int (*afu_cr_write8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 val); 1139 int (*afu_cr_write16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 val); 1140 int (*afu_cr_write32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 val); 1141 ssize_t (*read_adapter_vpd)(struct cxl *adapter, void *buf, size_t count); 1142 }; 1143 extern const struct cxl_backend_ops cxl_native_ops; 1144 extern const struct cxl_backend_ops cxl_guest_ops; 1145 extern const struct cxl_backend_ops *cxl_ops; 1146 1147 /* check if the given pci_dev is on the the cxl vphb bus */ 1148 bool cxl_pci_is_vphb_device(struct pci_dev *dev); 1149 1150 /* decode AFU error bits in the PSL register PSL_SERR_An */ 1151 void cxl_afu_decode_psl_serr(struct cxl_afu *afu, u64 serr); 1152 1153 /* 1154 * Increments the number of attached contexts on an adapter. 1155 * In case an adapter_context_lock is taken the return -EBUSY. 1156 */ 1157 int cxl_adapter_context_get(struct cxl *adapter); 1158 1159 /* Decrements the number of attached contexts on an adapter */ 1160 void cxl_adapter_context_put(struct cxl *adapter); 1161 1162 /* If no active contexts then prevents contexts from being attached */ 1163 int cxl_adapter_context_lock(struct cxl *adapter); 1164 1165 /* Unlock the contexts-lock if taken. Warn and force unlock otherwise */ 1166 void cxl_adapter_context_unlock(struct cxl *adapter); 1167 1168 /* Increases the reference count to "struct mm_struct" */ 1169 void cxl_context_mm_count_get(struct cxl_context *ctx); 1170 1171 /* Decrements the reference count to "struct mm_struct" */ 1172 void cxl_context_mm_count_put(struct cxl_context *ctx); 1173 1174 #endif 1175