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 <uapi/misc/cxl.h> 28 29 extern uint cxl_verbose; 30 31 #define CXL_TIMEOUT 5 32 33 /* 34 * Bump version each time a user API change is made, whether it is 35 * backwards compatible ot not. 36 */ 37 #define CXL_API_VERSION 2 38 #define CXL_API_VERSION_COMPATIBLE 1 39 40 /* 41 * Opaque types to avoid accidentally passing registers for the wrong MMIO 42 * 43 * At the end of the day, I'm not married to using typedef here, but it might 44 * (and has!) help avoid bugs like mixing up CXL_PSL_CtxTime and 45 * CXL_PSL_CtxTime_An, or calling cxl_p1n_write instead of cxl_p1_write. 46 * 47 * I'm quite happy if these are changed back to #defines before upstreaming, it 48 * should be little more than a regexp search+replace operation in this file. 49 */ 50 typedef struct { 51 const int x; 52 } cxl_p1_reg_t; 53 typedef struct { 54 const int x; 55 } cxl_p1n_reg_t; 56 typedef struct { 57 const int x; 58 } cxl_p2n_reg_t; 59 #define cxl_reg_off(reg) \ 60 (reg.x) 61 62 /* Memory maps. Ref CXL Appendix A */ 63 64 /* PSL Privilege 1 Memory Map */ 65 /* Configuration and Control area */ 66 static const cxl_p1_reg_t CXL_PSL_CtxTime = {0x0000}; 67 static const cxl_p1_reg_t CXL_PSL_ErrIVTE = {0x0008}; 68 static const cxl_p1_reg_t CXL_PSL_KEY1 = {0x0010}; 69 static const cxl_p1_reg_t CXL_PSL_KEY2 = {0x0018}; 70 static const cxl_p1_reg_t CXL_PSL_Control = {0x0020}; 71 /* Downloading */ 72 static const cxl_p1_reg_t CXL_PSL_DLCNTL = {0x0060}; 73 static const cxl_p1_reg_t CXL_PSL_DLADDR = {0x0068}; 74 75 /* PSL Lookaside Buffer Management Area */ 76 static const cxl_p1_reg_t CXL_PSL_LBISEL = {0x0080}; 77 static const cxl_p1_reg_t CXL_PSL_SLBIE = {0x0088}; 78 static const cxl_p1_reg_t CXL_PSL_SLBIA = {0x0090}; 79 static const cxl_p1_reg_t CXL_PSL_TLBIE = {0x00A0}; 80 static const cxl_p1_reg_t CXL_PSL_TLBIA = {0x00A8}; 81 static const cxl_p1_reg_t CXL_PSL_AFUSEL = {0x00B0}; 82 83 /* 0x00C0:7EFF Implementation dependent area */ 84 static const cxl_p1_reg_t CXL_PSL_FIR1 = {0x0100}; 85 static const cxl_p1_reg_t CXL_PSL_FIR2 = {0x0108}; 86 static const cxl_p1_reg_t CXL_PSL_Timebase = {0x0110}; 87 static const cxl_p1_reg_t CXL_PSL_VERSION = {0x0118}; 88 static const cxl_p1_reg_t CXL_PSL_RESLCKTO = {0x0128}; 89 static const cxl_p1_reg_t CXL_PSL_TB_CTLSTAT = {0x0140}; 90 static const cxl_p1_reg_t CXL_PSL_FIR_CNTL = {0x0148}; 91 static const cxl_p1_reg_t CXL_PSL_DSNDCTL = {0x0150}; 92 static const cxl_p1_reg_t CXL_PSL_SNWRALLOC = {0x0158}; 93 static const cxl_p1_reg_t CXL_PSL_TRACE = {0x0170}; 94 /* 0x7F00:7FFF Reserved PCIe MSI-X Pending Bit Array area */ 95 /* 0x8000:FFFF Reserved PCIe MSI-X Table Area */ 96 97 /* PSL Slice Privilege 1 Memory Map */ 98 /* Configuration Area */ 99 static const cxl_p1n_reg_t CXL_PSL_SR_An = {0x00}; 100 static const cxl_p1n_reg_t CXL_PSL_LPID_An = {0x08}; 101 static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10}; 102 static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18}; 103 static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20}; 104 static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28}; 105 /* Memory Management and Lookaside Buffer Management */ 106 static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30}; 107 static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38}; 108 /* Pointer Area */ 109 static const cxl_p1n_reg_t CXL_HAURP_An = {0x80}; 110 static const cxl_p1n_reg_t CXL_PSL_SPAP_An = {0x88}; 111 static const cxl_p1n_reg_t CXL_PSL_LLCMD_An = {0x90}; 112 /* Control Area */ 113 static const cxl_p1n_reg_t CXL_PSL_SCNTL_An = {0xA0}; 114 static const cxl_p1n_reg_t CXL_PSL_CtxTime_An = {0xA8}; 115 static const cxl_p1n_reg_t CXL_PSL_IVTE_Offset_An = {0xB0}; 116 static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8}; 117 /* 0xC0:FF Implementation Dependent Area */ 118 static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0}; 119 static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8}; 120 static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0}; 121 static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8}; 122 static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0}; 123 static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8}; 124 125 /* PSL Slice Privilege 2 Memory Map */ 126 /* Configuration and Control Area */ 127 static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000}; 128 static const cxl_p2n_reg_t CXL_CSRP_An = {0x008}; 129 static const cxl_p2n_reg_t CXL_AURP0_An = {0x010}; 130 static const cxl_p2n_reg_t CXL_AURP1_An = {0x018}; 131 static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020}; 132 static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028}; 133 static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030}; 134 /* Segment Lookaside Buffer Management */ 135 static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040}; 136 static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048}; 137 static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050}; 138 /* Interrupt Registers */ 139 static const cxl_p2n_reg_t CXL_PSL_DSISR_An = {0x060}; 140 static const cxl_p2n_reg_t CXL_PSL_DAR_An = {0x068}; 141 static const cxl_p2n_reg_t CXL_PSL_DSR_An = {0x070}; 142 static const cxl_p2n_reg_t CXL_PSL_TFC_An = {0x078}; 143 static const cxl_p2n_reg_t CXL_PSL_PEHandle_An = {0x080}; 144 static const cxl_p2n_reg_t CXL_PSL_ErrStat_An = {0x088}; 145 /* AFU Registers */ 146 static const cxl_p2n_reg_t CXL_AFU_Cntl_An = {0x090}; 147 static const cxl_p2n_reg_t CXL_AFU_ERR_An = {0x098}; 148 /* Work Element Descriptor */ 149 static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; 150 /* 0x0C0:FFF Implementation Dependent Area */ 151 152 #define CXL_PSL_SPAP_Addr 0x0ffffffffffff000ULL 153 #define CXL_PSL_SPAP_Size 0x0000000000000ff0ULL 154 #define CXL_PSL_SPAP_Size_Shift 4 155 #define CXL_PSL_SPAP_V 0x0000000000000001ULL 156 157 /****** CXL_PSL_Control ****************************************************/ 158 #define CXL_PSL_Control_tb 0x0000000000000001ULL 159 160 /****** CXL_PSL_DLCNTL *****************************************************/ 161 #define CXL_PSL_DLCNTL_D (0x1ull << (63-28)) 162 #define CXL_PSL_DLCNTL_C (0x1ull << (63-29)) 163 #define CXL_PSL_DLCNTL_E (0x1ull << (63-30)) 164 #define CXL_PSL_DLCNTL_S (0x1ull << (63-31)) 165 #define CXL_PSL_DLCNTL_CE (CXL_PSL_DLCNTL_C | CXL_PSL_DLCNTL_E) 166 #define CXL_PSL_DLCNTL_DCES (CXL_PSL_DLCNTL_D | CXL_PSL_DLCNTL_CE | CXL_PSL_DLCNTL_S) 167 168 /****** CXL_PSL_SR_An ******************************************************/ 169 #define CXL_PSL_SR_An_SF MSR_SF /* 64bit */ 170 #define CXL_PSL_SR_An_TA (1ull << (63-1)) /* Tags active, GA1: 0 */ 171 #define CXL_PSL_SR_An_HV MSR_HV /* Hypervisor, GA1: 0 */ 172 #define CXL_PSL_SR_An_PR MSR_PR /* Problem state, GA1: 1 */ 173 #define CXL_PSL_SR_An_ISL (1ull << (63-53)) /* Ignore Segment Large Page */ 174 #define CXL_PSL_SR_An_TC (1ull << (63-54)) /* Page Table secondary hash */ 175 #define CXL_PSL_SR_An_US (1ull << (63-56)) /* User state, GA1: X */ 176 #define CXL_PSL_SR_An_SC (1ull << (63-58)) /* Segment Table secondary hash */ 177 #define CXL_PSL_SR_An_R MSR_DR /* Relocate, GA1: 1 */ 178 #define CXL_PSL_SR_An_MP (1ull << (63-62)) /* Master Process */ 179 #define CXL_PSL_SR_An_LE (1ull << (63-63)) /* Little Endian */ 180 181 /****** CXL_PSL_LLCMD_An ****************************************************/ 182 #define CXL_LLCMD_TERMINATE 0x0001000000000000ULL 183 #define CXL_LLCMD_REMOVE 0x0002000000000000ULL 184 #define CXL_LLCMD_SUSPEND 0x0003000000000000ULL 185 #define CXL_LLCMD_RESUME 0x0004000000000000ULL 186 #define CXL_LLCMD_ADD 0x0005000000000000ULL 187 #define CXL_LLCMD_UPDATE 0x0006000000000000ULL 188 #define CXL_LLCMD_HANDLE_MASK 0x000000000000ffffULL 189 190 /****** CXL_PSL_ID_An ****************************************************/ 191 #define CXL_PSL_ID_An_F (1ull << (63-31)) 192 #define CXL_PSL_ID_An_L (1ull << (63-30)) 193 194 /****** CXL_PSL_SCNTL_An ****************************************************/ 195 #define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) 196 /* Programming Modes: */ 197 #define CXL_PSL_SCNTL_An_PM_MASK (0xffffull << (63-31)) 198 #define CXL_PSL_SCNTL_An_PM_Shared (0x0000ull << (63-31)) 199 #define CXL_PSL_SCNTL_An_PM_OS (0x0001ull << (63-31)) 200 #define CXL_PSL_SCNTL_An_PM_Process (0x0002ull << (63-31)) 201 #define CXL_PSL_SCNTL_An_PM_AFU (0x0004ull << (63-31)) 202 #define CXL_PSL_SCNTL_An_PM_AFU_PBT (0x0104ull << (63-31)) 203 /* Purge Status (ro) */ 204 #define CXL_PSL_SCNTL_An_Ps_MASK (0x3ull << (63-39)) 205 #define CXL_PSL_SCNTL_An_Ps_Pending (0x1ull << (63-39)) 206 #define CXL_PSL_SCNTL_An_Ps_Complete (0x3ull << (63-39)) 207 /* Purge */ 208 #define CXL_PSL_SCNTL_An_Pc (0x1ull << (63-48)) 209 /* Suspend Status (ro) */ 210 #define CXL_PSL_SCNTL_An_Ss_MASK (0x3ull << (63-55)) 211 #define CXL_PSL_SCNTL_An_Ss_Pending (0x1ull << (63-55)) 212 #define CXL_PSL_SCNTL_An_Ss_Complete (0x3ull << (63-55)) 213 /* Suspend Control */ 214 #define CXL_PSL_SCNTL_An_Sc (0x1ull << (63-63)) 215 216 /* AFU Slice Enable Status (ro) */ 217 #define CXL_AFU_Cntl_An_ES_MASK (0x7ull << (63-2)) 218 #define CXL_AFU_Cntl_An_ES_Disabled (0x0ull << (63-2)) 219 #define CXL_AFU_Cntl_An_ES_Enabled (0x4ull << (63-2)) 220 /* AFU Slice Enable */ 221 #define CXL_AFU_Cntl_An_E (0x1ull << (63-3)) 222 /* AFU Slice Reset status (ro) */ 223 #define CXL_AFU_Cntl_An_RS_MASK (0x3ull << (63-5)) 224 #define CXL_AFU_Cntl_An_RS_Pending (0x1ull << (63-5)) 225 #define CXL_AFU_Cntl_An_RS_Complete (0x2ull << (63-5)) 226 /* AFU Slice Reset */ 227 #define CXL_AFU_Cntl_An_RA (0x1ull << (63-7)) 228 229 /****** CXL_SSTP0/1_An ******************************************************/ 230 /* These top bits are for the segment that CONTAINS the segment table */ 231 #define CXL_SSTP0_An_B_SHIFT SLB_VSID_SSIZE_SHIFT 232 #define CXL_SSTP0_An_KS (1ull << (63-2)) 233 #define CXL_SSTP0_An_KP (1ull << (63-3)) 234 #define CXL_SSTP0_An_N (1ull << (63-4)) 235 #define CXL_SSTP0_An_L (1ull << (63-5)) 236 #define CXL_SSTP0_An_C (1ull << (63-6)) 237 #define CXL_SSTP0_An_TA (1ull << (63-7)) 238 #define CXL_SSTP0_An_LP_SHIFT (63-9) /* 2 Bits */ 239 /* And finally, the virtual address & size of the segment table: */ 240 #define CXL_SSTP0_An_SegTableSize_SHIFT (63-31) /* 12 Bits */ 241 #define CXL_SSTP0_An_SegTableSize_MASK \ 242 (((1ull << 12) - 1) << CXL_SSTP0_An_SegTableSize_SHIFT) 243 #define CXL_SSTP0_An_STVA_U_MASK ((1ull << (63-49))-1) 244 #define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1)) 245 #define CXL_SSTP1_An_V (1ull << (63-63)) 246 247 /****** CXL_PSL_SLBIE_[An] **************************************************/ 248 /* write: */ 249 #define CXL_SLBIE_C PPC_BIT(36) /* Class */ 250 #define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */ 251 #define CXL_SLBIE_SS_SHIFT PPC_BITLSHIFT(38) 252 #define CXL_SLBIE_TA PPC_BIT(38) /* Tags Active */ 253 /* read: */ 254 #define CXL_SLBIE_MAX PPC_BITMASK(24, 31) 255 #define CXL_SLBIE_PENDING PPC_BITMASK(56, 63) 256 257 /****** Common to all CXL_TLBIA/SLBIA_[An] **********************************/ 258 #define CXL_TLB_SLB_P (1ull) /* Pending (read) */ 259 260 /****** Common to all CXL_TLB/SLB_IA/IE_[An] registers **********************/ 261 #define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */ 262 #define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */ 263 #define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */ 264 265 /****** CXL_PSL_AFUSEL ******************************************************/ 266 #define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */ 267 268 /****** CXL_PSL_DSISR_An ****************************************************/ 269 #define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */ 270 #define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */ 271 #define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */ 272 #define CXL_PSL_DSISR_An_UR (1ull << (63-3)) /* AURP PTE not found */ 273 #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) 274 #define CXL_PSL_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ 275 #define CXL_PSL_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ 276 #define CXL_PSL_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ 277 /* NOTE: Bits 32:63 are undefined if DSISR[DS] = 1 */ 278 #define CXL_PSL_DSISR_An_M DSISR_NOHPTE /* PTE not found */ 279 #define CXL_PSL_DSISR_An_P DSISR_PROTFAULT /* Storage protection violation */ 280 #define CXL_PSL_DSISR_An_A (1ull << (63-37)) /* AFU lock access to write through or cache inhibited storage */ 281 #define CXL_PSL_DSISR_An_S DSISR_ISSTORE /* Access was afu_wr or afu_zero */ 282 #define CXL_PSL_DSISR_An_K DSISR_KEYFAULT /* Access not permitted by virtual page class key protection */ 283 284 /****** CXL_PSL_TFC_An ******************************************************/ 285 #define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */ 286 #define CXL_PSL_TFC_An_C (1ull << (63-29)) /* Continue (abort transaction) */ 287 #define CXL_PSL_TFC_An_AE (1ull << (63-30)) /* Restart PSL with address error */ 288 #define CXL_PSL_TFC_An_R (1ull << (63-31)) /* Restart PSL transaction */ 289 290 /* cxl_process_element->software_status */ 291 #define CXL_PE_SOFTWARE_STATE_V (1ul << (31 - 0)) /* Valid */ 292 #define CXL_PE_SOFTWARE_STATE_C (1ul << (31 - 29)) /* Complete */ 293 #define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */ 294 #define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */ 295 296 /****** CXL_PSL_RXCTL_An (Implementation Specific) ************************** 297 * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to 298 * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x 299 * of the hang pulse frequency. 300 */ 301 #define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL 302 303 /* SPA->sw_command_status */ 304 #define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL 305 #define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL 306 #define CXL_SPA_SW_CMD_REMOVE 0x0002000000000000ULL 307 #define CXL_SPA_SW_CMD_SUSPEND 0x0003000000000000ULL 308 #define CXL_SPA_SW_CMD_RESUME 0x0004000000000000ULL 309 #define CXL_SPA_SW_CMD_ADD 0x0005000000000000ULL 310 #define CXL_SPA_SW_CMD_UPDATE 0x0006000000000000ULL 311 #define CXL_SPA_SW_STATE_MASK 0x0000ffff00000000ULL 312 #define CXL_SPA_SW_STATE_TERMINATED 0x0000000100000000ULL 313 #define CXL_SPA_SW_STATE_REMOVED 0x0000000200000000ULL 314 #define CXL_SPA_SW_STATE_SUSPENDED 0x0000000300000000ULL 315 #define CXL_SPA_SW_STATE_RESUMED 0x0000000400000000ULL 316 #define CXL_SPA_SW_STATE_ADDED 0x0000000500000000ULL 317 #define CXL_SPA_SW_STATE_UPDATED 0x0000000600000000ULL 318 #define CXL_SPA_SW_PSL_ID_MASK 0x00000000ffff0000ULL 319 #define CXL_SPA_SW_LINK_MASK 0x000000000000ffffULL 320 321 #define CXL_MAX_SLICES 4 322 #define MAX_AFU_MMIO_REGS 3 323 324 #define CXL_MODE_TIME_SLICED 0x4 325 #define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) 326 327 enum cxl_context_status { 328 CLOSED, 329 OPENED, 330 STARTED 331 }; 332 333 enum prefault_modes { 334 CXL_PREFAULT_NONE, 335 CXL_PREFAULT_WED, 336 CXL_PREFAULT_ALL, 337 }; 338 339 struct cxl_sste { 340 __be64 esid_data; 341 __be64 vsid_data; 342 }; 343 344 #define to_cxl_adapter(d) container_of(d, struct cxl, dev) 345 #define to_cxl_afu(d) container_of(d, struct cxl_afu, dev) 346 347 struct cxl_afu { 348 irq_hw_number_t psl_hwirq; 349 irq_hw_number_t serr_hwirq; 350 char *err_irq_name; 351 char *psl_irq_name; 352 unsigned int serr_virq; 353 void __iomem *p1n_mmio; 354 void __iomem *p2n_mmio; 355 phys_addr_t psn_phys; 356 u64 pp_offset; 357 u64 pp_size; 358 void __iomem *afu_desc_mmio; 359 struct cxl *adapter; 360 struct device dev; 361 struct cdev afu_cdev_s, afu_cdev_m, afu_cdev_d; 362 struct device *chardev_s, *chardev_m, *chardev_d; 363 struct idr contexts_idr; 364 struct dentry *debugfs; 365 struct mutex contexts_lock; 366 struct mutex spa_mutex; 367 spinlock_t afu_cntl_lock; 368 369 /* AFU error buffer fields and bin attribute for sysfs */ 370 u64 eb_len, eb_offset; 371 struct bin_attribute attr_eb; 372 373 /* 374 * Only the first part of the SPA is used for the process element 375 * linked list. The only other part that software needs to worry about 376 * is sw_command_status, which we store a separate pointer to. 377 * Everything else in the SPA is only used by hardware 378 */ 379 struct cxl_process_element *spa; 380 __be64 *sw_command_status; 381 unsigned int spa_size; 382 int spa_order; 383 int spa_max_procs; 384 unsigned int psl_virq; 385 386 /* pointer to the vphb */ 387 struct pci_controller *phb; 388 389 int pp_irqs; 390 int irqs_max; 391 int num_procs; 392 int max_procs_virtualised; 393 int slice; 394 int modes_supported; 395 int current_mode; 396 int crs_num; 397 u64 crs_len; 398 u64 crs_offset; 399 struct list_head crs; 400 enum prefault_modes prefault_mode; 401 bool psa; 402 bool pp_psa; 403 bool enabled; 404 }; 405 406 /* AFU refcount management */ 407 static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) 408 { 409 410 return (get_device(&afu->dev) == NULL) ? NULL : afu; 411 } 412 413 static inline void cxl_afu_put(struct cxl_afu *afu) 414 { 415 put_device(&afu->dev); 416 } 417 418 419 struct cxl_irq_name { 420 struct list_head list; 421 char *name; 422 }; 423 424 /* 425 * This is a cxl context. If the PSL is in dedicated mode, there will be one 426 * of these per AFU. If in AFU directed there can be lots of these. 427 */ 428 struct cxl_context { 429 struct cxl_afu *afu; 430 431 /* Problem state MMIO */ 432 phys_addr_t psn_phys; 433 u64 psn_size; 434 435 /* Used to unmap any mmaps when force detaching */ 436 struct address_space *mapping; 437 struct mutex mapping_lock; 438 struct page *ff_page; 439 bool mmio_err_ff; 440 bool kernelapi; 441 442 spinlock_t sste_lock; /* Protects segment table entries */ 443 struct cxl_sste *sstp; 444 u64 sstp0, sstp1; 445 unsigned int sst_size, sst_lru; 446 447 wait_queue_head_t wq; 448 struct pid *pid; 449 spinlock_t lock; /* Protects pending_irq_mask, pending_fault and fault_addr */ 450 /* Only used in PR mode */ 451 u64 process_token; 452 453 unsigned long *irq_bitmap; /* Accessed from IRQ context */ 454 struct cxl_irq_ranges irqs; 455 struct list_head irq_names; 456 u64 fault_addr; 457 u64 fault_dsisr; 458 u64 afu_err; 459 460 /* 461 * This status and it's lock pretects start and detach context 462 * from racing. It also prevents detach from racing with 463 * itself 464 */ 465 enum cxl_context_status status; 466 struct mutex status_mutex; 467 468 469 /* XXX: Is it possible to need multiple work items at once? */ 470 struct work_struct fault_work; 471 u64 dsisr; 472 u64 dar; 473 474 struct cxl_process_element *elem; 475 476 int pe; /* process element handle */ 477 u32 irq_count; 478 bool pe_inserted; 479 bool master; 480 bool kernel; 481 bool pending_irq; 482 bool pending_fault; 483 bool pending_afu_err; 484 485 struct rcu_head rcu; 486 }; 487 488 struct cxl { 489 void __iomem *p1_mmio; 490 void __iomem *p2_mmio; 491 irq_hw_number_t err_hwirq; 492 unsigned int err_virq; 493 spinlock_t afu_list_lock; 494 struct cxl_afu *afu[CXL_MAX_SLICES]; 495 struct device dev; 496 struct dentry *trace; 497 struct dentry *psl_err_chk; 498 struct dentry *debugfs; 499 char *irq_name; 500 struct bin_attribute cxl_attr; 501 int adapter_num; 502 int user_irqs; 503 u64 afu_desc_off; 504 u64 afu_desc_size; 505 u64 ps_off; 506 u64 ps_size; 507 u16 psl_rev; 508 u16 base_image; 509 u8 vsec_status; 510 u8 caia_major; 511 u8 caia_minor; 512 u8 slices; 513 bool user_image_loaded; 514 bool perst_loads_image; 515 bool perst_select_user; 516 bool perst_same_image; 517 }; 518 519 int cxl_alloc_one_irq(struct cxl *adapter); 520 void cxl_release_one_irq(struct cxl *adapter, int hwirq); 521 int cxl_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num); 522 void cxl_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter); 523 int cxl_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq); 524 int cxl_update_image_control(struct cxl *adapter); 525 int cxl_reset(struct cxl *adapter); 526 527 /* common == phyp + powernv */ 528 struct cxl_process_element_common { 529 __be32 tid; 530 __be32 pid; 531 __be64 csrp; 532 __be64 aurp0; 533 __be64 aurp1; 534 __be64 sstp0; 535 __be64 sstp1; 536 __be64 amr; 537 u8 reserved3[4]; 538 __be64 wed; 539 } __packed; 540 541 /* just powernv */ 542 struct cxl_process_element { 543 __be64 sr; 544 __be64 SPOffset; 545 __be64 sdr; 546 __be64 haurp; 547 __be32 ctxtime; 548 __be16 ivte_offsets[4]; 549 __be16 ivte_ranges[4]; 550 __be32 lpid; 551 struct cxl_process_element_common common; 552 __be32 software_state; 553 } __packed; 554 555 static inline bool cxl_adapter_link_ok(struct cxl *cxl) 556 { 557 struct pci_dev *pdev; 558 559 pdev = to_pci_dev(cxl->dev.parent); 560 return !pci_channel_offline(pdev); 561 } 562 563 static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg) 564 { 565 WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); 566 return cxl->p1_mmio + cxl_reg_off(reg); 567 } 568 569 static inline void cxl_p1_write(struct cxl *cxl, cxl_p1_reg_t reg, u64 val) 570 { 571 if (likely(cxl_adapter_link_ok(cxl))) 572 out_be64(_cxl_p1_addr(cxl, reg), val); 573 } 574 575 static inline u64 cxl_p1_read(struct cxl *cxl, cxl_p1_reg_t reg) 576 { 577 if (likely(cxl_adapter_link_ok(cxl))) 578 return in_be64(_cxl_p1_addr(cxl, reg)); 579 else 580 return ~0ULL; 581 } 582 583 static inline void __iomem *_cxl_p1n_addr(struct cxl_afu *afu, cxl_p1n_reg_t reg) 584 { 585 WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); 586 return afu->p1n_mmio + cxl_reg_off(reg); 587 } 588 589 static inline void cxl_p1n_write(struct cxl_afu *afu, cxl_p1n_reg_t reg, u64 val) 590 { 591 if (likely(cxl_adapter_link_ok(afu->adapter))) 592 out_be64(_cxl_p1n_addr(afu, reg), val); 593 } 594 595 static inline u64 cxl_p1n_read(struct cxl_afu *afu, cxl_p1n_reg_t reg) 596 { 597 if (likely(cxl_adapter_link_ok(afu->adapter))) 598 return in_be64(_cxl_p1n_addr(afu, reg)); 599 else 600 return ~0ULL; 601 } 602 603 static inline void __iomem *_cxl_p2n_addr(struct cxl_afu *afu, cxl_p2n_reg_t reg) 604 { 605 return afu->p2n_mmio + cxl_reg_off(reg); 606 } 607 608 static inline void cxl_p2n_write(struct cxl_afu *afu, cxl_p2n_reg_t reg, u64 val) 609 { 610 if (likely(cxl_adapter_link_ok(afu->adapter))) 611 out_be64(_cxl_p2n_addr(afu, reg), val); 612 } 613 614 static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg) 615 { 616 if (likely(cxl_adapter_link_ok(afu->adapter))) 617 return in_be64(_cxl_p2n_addr(afu, reg)); 618 else 619 return ~0ULL; 620 } 621 622 static inline u64 cxl_afu_cr_read64(struct cxl_afu *afu, int cr, u64 off) 623 { 624 if (likely(cxl_adapter_link_ok(afu->adapter))) 625 return in_le64((afu)->afu_desc_mmio + (afu)->crs_offset + 626 ((cr) * (afu)->crs_len) + (off)); 627 else 628 return ~0ULL; 629 } 630 631 static inline u32 cxl_afu_cr_read32(struct cxl_afu *afu, int cr, u64 off) 632 { 633 if (likely(cxl_adapter_link_ok(afu->adapter))) 634 return in_le32((afu)->afu_desc_mmio + (afu)->crs_offset + 635 ((cr) * (afu)->crs_len) + (off)); 636 else 637 return 0xffffffff; 638 } 639 u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off); 640 u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off); 641 642 ssize_t cxl_afu_read_err_buffer(struct cxl_afu *afu, char *buf, 643 loff_t off, size_t count); 644 645 646 struct cxl_calls { 647 void (*cxl_slbia)(struct mm_struct *mm); 648 struct module *owner; 649 }; 650 int register_cxl_calls(struct cxl_calls *calls); 651 void unregister_cxl_calls(struct cxl_calls *calls); 652 653 int cxl_alloc_adapter_nr(struct cxl *adapter); 654 void cxl_remove_adapter_nr(struct cxl *adapter); 655 656 int cxl_alloc_spa(struct cxl_afu *afu); 657 void cxl_release_spa(struct cxl_afu *afu); 658 659 int cxl_file_init(void); 660 void cxl_file_exit(void); 661 int cxl_register_adapter(struct cxl *adapter); 662 int cxl_register_afu(struct cxl_afu *afu); 663 int cxl_chardev_d_afu_add(struct cxl_afu *afu); 664 int cxl_chardev_m_afu_add(struct cxl_afu *afu); 665 int cxl_chardev_s_afu_add(struct cxl_afu *afu); 666 void cxl_chardev_afu_remove(struct cxl_afu *afu); 667 668 void cxl_context_detach_all(struct cxl_afu *afu); 669 void cxl_context_free(struct cxl_context *ctx); 670 void cxl_context_detach(struct cxl_context *ctx); 671 672 int cxl_sysfs_adapter_add(struct cxl *adapter); 673 void cxl_sysfs_adapter_remove(struct cxl *adapter); 674 int cxl_sysfs_afu_add(struct cxl_afu *afu); 675 void cxl_sysfs_afu_remove(struct cxl_afu *afu); 676 int cxl_sysfs_afu_m_add(struct cxl_afu *afu); 677 void cxl_sysfs_afu_m_remove(struct cxl_afu *afu); 678 679 int cxl_afu_activate_mode(struct cxl_afu *afu, int mode); 680 int _cxl_afu_deactivate_mode(struct cxl_afu *afu, int mode); 681 int cxl_afu_deactivate_mode(struct cxl_afu *afu); 682 int cxl_afu_select_best_mode(struct cxl_afu *afu); 683 684 int cxl_register_psl_irq(struct cxl_afu *afu); 685 void cxl_release_psl_irq(struct cxl_afu *afu); 686 int cxl_register_psl_err_irq(struct cxl *adapter); 687 void cxl_release_psl_err_irq(struct cxl *adapter); 688 int cxl_register_serr_irq(struct cxl_afu *afu); 689 void cxl_release_serr_irq(struct cxl_afu *afu); 690 int afu_register_irqs(struct cxl_context *ctx, u32 count); 691 void afu_release_irqs(struct cxl_context *ctx, void *cookie); 692 void afu_irq_name_free(struct cxl_context *ctx); 693 irqreturn_t cxl_slice_irq_err(int irq, void *data); 694 695 int cxl_debugfs_init(void); 696 void cxl_debugfs_exit(void); 697 int cxl_debugfs_adapter_add(struct cxl *adapter); 698 void cxl_debugfs_adapter_remove(struct cxl *adapter); 699 int cxl_debugfs_afu_add(struct cxl_afu *afu); 700 void cxl_debugfs_afu_remove(struct cxl_afu *afu); 701 702 void cxl_handle_fault(struct work_struct *work); 703 void cxl_prefault(struct cxl_context *ctx, u64 wed); 704 705 struct cxl *get_cxl_adapter(int num); 706 int cxl_alloc_sst(struct cxl_context *ctx); 707 708 void init_cxl_native(void); 709 710 struct cxl_context *cxl_context_alloc(void); 711 int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, 712 struct address_space *mapping); 713 void cxl_context_free(struct cxl_context *ctx); 714 int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma); 715 unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq, 716 irq_handler_t handler, void *cookie, const char *name); 717 void cxl_unmap_irq(unsigned int virq, void *cookie); 718 int __detach_context(struct cxl_context *ctx); 719 720 /* This matches the layout of the H_COLLECT_CA_INT_INFO retbuf */ 721 struct cxl_irq_info { 722 u64 dsisr; 723 u64 dar; 724 u64 dsr; 725 u32 pid; 726 u32 tid; 727 u64 afu_err; 728 u64 errstat; 729 u64 padding[3]; /* to match the expected retbuf size for plpar_hcall9 */ 730 }; 731 732 void cxl_assign_psn_space(struct cxl_context *ctx); 733 int cxl_attach_process(struct cxl_context *ctx, bool kernel, u64 wed, 734 u64 amr); 735 int cxl_detach_process(struct cxl_context *ctx); 736 737 int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info); 738 int cxl_ack_irq(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask); 739 740 int cxl_check_error(struct cxl_afu *afu); 741 int cxl_afu_slbia(struct cxl_afu *afu); 742 int cxl_tlb_slb_invalidate(struct cxl *adapter); 743 int cxl_afu_disable(struct cxl_afu *afu); 744 int __cxl_afu_reset(struct cxl_afu *afu); 745 int cxl_afu_check_and_enable(struct cxl_afu *afu); 746 int cxl_psl_purge(struct cxl_afu *afu); 747 748 void cxl_stop_trace(struct cxl *cxl); 749 int cxl_pci_vphb_add(struct cxl_afu *afu); 750 void cxl_pci_vphb_reconfigure(struct cxl_afu *afu); 751 void cxl_pci_vphb_remove(struct cxl_afu *afu); 752 753 extern struct pci_driver cxl_pci_driver; 754 int afu_allocate_irqs(struct cxl_context *ctx, u32 count); 755 756 int afu_open(struct inode *inode, struct file *file); 757 int afu_release(struct inode *inode, struct file *file); 758 long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 759 int afu_mmap(struct file *file, struct vm_area_struct *vm); 760 unsigned int afu_poll(struct file *file, struct poll_table_struct *poll); 761 ssize_t afu_read(struct file *file, char __user *buf, size_t count, loff_t *off); 762 extern const struct file_operations afu_fops; 763 764 #endif 765