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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 | /* * Copyright 2014 IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _CXL_H_ #define _CXL_H_ #include <linux/interrupt.h> #include <linux/semaphore.h> #include <linux/device.h> #include <linux/types.h> #include <linux/cdev.h> #include <linux/pid.h> #include <linux/io.h> #include <linux/pci.h> #include <linux/fs.h> #include <asm/cputable.h> #include <asm/mmu.h> #include <asm/reg.h> #include <misc/cxl-base.h> #include <uapi/misc/cxl.h> extern uint cxl_verbose; #define CXL_TIMEOUT 5 /* * Bump version each time a user API change is made, whether it is * backwards compatible ot not. */ #define CXL_API_VERSION 2 #define CXL_API_VERSION_COMPATIBLE 1 /* * Opaque types to avoid accidentally passing registers for the wrong MMIO * * At the end of the day, I'm not married to using typedef here, but it might * (and has!) help avoid bugs like mixing up CXL_PSL_CtxTime and * CXL_PSL_CtxTime_An, or calling cxl_p1n_write instead of cxl_p1_write. * * I'm quite happy if these are changed back to #defines before upstreaming, it * should be little more than a regexp search+replace operation in this file. */ typedef struct { const int x; } cxl_p1_reg_t; typedef struct { const int x; } cxl_p1n_reg_t; typedef struct { const int x; } cxl_p2n_reg_t; #define cxl_reg_off(reg) \ (reg.x) /* Memory maps. Ref CXL Appendix A */ /* PSL Privilege 1 Memory Map */ /* Configuration and Control area */ static const cxl_p1_reg_t CXL_PSL_CtxTime = {0x0000}; static const cxl_p1_reg_t CXL_PSL_ErrIVTE = {0x0008}; static const cxl_p1_reg_t CXL_PSL_KEY1 = {0x0010}; static const cxl_p1_reg_t CXL_PSL_KEY2 = {0x0018}; static const cxl_p1_reg_t CXL_PSL_Control = {0x0020}; /* Downloading */ static const cxl_p1_reg_t CXL_PSL_DLCNTL = {0x0060}; static const cxl_p1_reg_t CXL_PSL_DLADDR = {0x0068}; /* PSL Lookaside Buffer Management Area */ static const cxl_p1_reg_t CXL_PSL_LBISEL = {0x0080}; static const cxl_p1_reg_t CXL_PSL_SLBIE = {0x0088}; static const cxl_p1_reg_t CXL_PSL_SLBIA = {0x0090}; static const cxl_p1_reg_t CXL_PSL_TLBIE = {0x00A0}; static const cxl_p1_reg_t CXL_PSL_TLBIA = {0x00A8}; static const cxl_p1_reg_t CXL_PSL_AFUSEL = {0x00B0}; /* 0x00C0:7EFF Implementation dependent area */ static const cxl_p1_reg_t CXL_PSL_FIR1 = {0x0100}; static const cxl_p1_reg_t CXL_PSL_FIR2 = {0x0108}; static const cxl_p1_reg_t CXL_PSL_Timebase = {0x0110}; static const cxl_p1_reg_t CXL_PSL_VERSION = {0x0118}; static const cxl_p1_reg_t CXL_PSL_RESLCKTO = {0x0128}; static const cxl_p1_reg_t CXL_PSL_TB_CTLSTAT = {0x0140}; static const cxl_p1_reg_t CXL_PSL_FIR_CNTL = {0x0148}; static const cxl_p1_reg_t CXL_PSL_DSNDCTL = {0x0150}; static const cxl_p1_reg_t CXL_PSL_SNWRALLOC = {0x0158}; static const cxl_p1_reg_t CXL_PSL_TRACE = {0x0170}; /* 0x7F00:7FFF Reserved PCIe MSI-X Pending Bit Array area */ /* 0x8000:FFFF Reserved PCIe MSI-X Table Area */ /* PSL Slice Privilege 1 Memory Map */ /* Configuration Area */ static const cxl_p1n_reg_t CXL_PSL_SR_An = {0x00}; static const cxl_p1n_reg_t CXL_PSL_LPID_An = {0x08}; static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10}; static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18}; static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20}; static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28}; /* Memory Management and Lookaside Buffer Management */ static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30}; static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38}; /* Pointer Area */ static const cxl_p1n_reg_t CXL_HAURP_An = {0x80}; static const cxl_p1n_reg_t CXL_PSL_SPAP_An = {0x88}; static const cxl_p1n_reg_t CXL_PSL_LLCMD_An = {0x90}; /* Control Area */ static const cxl_p1n_reg_t CXL_PSL_SCNTL_An = {0xA0}; static const cxl_p1n_reg_t CXL_PSL_CtxTime_An = {0xA8}; static const cxl_p1n_reg_t CXL_PSL_IVTE_Offset_An = {0xB0}; static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8}; /* 0xC0:FF Implementation Dependent Area */ static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0}; static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8}; static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0}; static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8}; static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0}; static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8}; /* PSL Slice Privilege 2 Memory Map */ /* Configuration and Control Area */ static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000}; static const cxl_p2n_reg_t CXL_CSRP_An = {0x008}; static const cxl_p2n_reg_t CXL_AURP0_An = {0x010}; static const cxl_p2n_reg_t CXL_AURP1_An = {0x018}; static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020}; static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028}; static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030}; /* Segment Lookaside Buffer Management */ static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040}; static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048}; static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050}; /* Interrupt Registers */ static const cxl_p2n_reg_t CXL_PSL_DSISR_An = {0x060}; static const cxl_p2n_reg_t CXL_PSL_DAR_An = {0x068}; static const cxl_p2n_reg_t CXL_PSL_DSR_An = {0x070}; static const cxl_p2n_reg_t CXL_PSL_TFC_An = {0x078}; static const cxl_p2n_reg_t CXL_PSL_PEHandle_An = {0x080}; static const cxl_p2n_reg_t CXL_PSL_ErrStat_An = {0x088}; /* AFU Registers */ static const cxl_p2n_reg_t CXL_AFU_Cntl_An = {0x090}; static const cxl_p2n_reg_t CXL_AFU_ERR_An = {0x098}; /* Work Element Descriptor */ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; /* 0x0C0:FFF Implementation Dependent Area */ #define CXL_PSL_SPAP_Addr 0x0ffffffffffff000ULL #define CXL_PSL_SPAP_Size 0x0000000000000ff0ULL #define CXL_PSL_SPAP_Size_Shift 4 #define CXL_PSL_SPAP_V 0x0000000000000001ULL /****** CXL_PSL_Control ****************************************************/ #define CXL_PSL_Control_tb 0x0000000000000001ULL /****** CXL_PSL_DLCNTL *****************************************************/ #define CXL_PSL_DLCNTL_D (0x1ull << (63-28)) #define CXL_PSL_DLCNTL_C (0x1ull << (63-29)) #define CXL_PSL_DLCNTL_E (0x1ull << (63-30)) #define CXL_PSL_DLCNTL_S (0x1ull << (63-31)) #define CXL_PSL_DLCNTL_CE (CXL_PSL_DLCNTL_C | CXL_PSL_DLCNTL_E) #define CXL_PSL_DLCNTL_DCES (CXL_PSL_DLCNTL_D | CXL_PSL_DLCNTL_CE | CXL_PSL_DLCNTL_S) /****** CXL_PSL_SR_An ******************************************************/ #define CXL_PSL_SR_An_SF MSR_SF /* 64bit */ #define CXL_PSL_SR_An_TA (1ull << (63-1)) /* Tags active, GA1: 0 */ #define CXL_PSL_SR_An_HV MSR_HV /* Hypervisor, GA1: 0 */ #define CXL_PSL_SR_An_PR MSR_PR /* Problem state, GA1: 1 */ #define CXL_PSL_SR_An_ISL (1ull << (63-53)) /* Ignore Segment Large Page */ #define CXL_PSL_SR_An_TC (1ull << (63-54)) /* Page Table secondary hash */ #define CXL_PSL_SR_An_US (1ull << (63-56)) /* User state, GA1: X */ #define CXL_PSL_SR_An_SC (1ull << (63-58)) /* Segment Table secondary hash */ #define CXL_PSL_SR_An_R MSR_DR /* Relocate, GA1: 1 */ #define CXL_PSL_SR_An_MP (1ull << (63-62)) /* Master Process */ #define CXL_PSL_SR_An_LE (1ull << (63-63)) /* Little Endian */ /****** CXL_PSL_LLCMD_An ****************************************************/ #define CXL_LLCMD_TERMINATE 0x0001000000000000ULL #define CXL_LLCMD_REMOVE 0x0002000000000000ULL #define CXL_LLCMD_SUSPEND 0x0003000000000000ULL #define CXL_LLCMD_RESUME 0x0004000000000000ULL #define CXL_LLCMD_ADD 0x0005000000000000ULL #define CXL_LLCMD_UPDATE 0x0006000000000000ULL #define CXL_LLCMD_HANDLE_MASK 0x000000000000ffffULL /****** CXL_PSL_ID_An ****************************************************/ #define CXL_PSL_ID_An_F (1ull << (63-31)) #define CXL_PSL_ID_An_L (1ull << (63-30)) /****** CXL_PSL_SCNTL_An ****************************************************/ #define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) /* Programming Modes: */ #define CXL_PSL_SCNTL_An_PM_MASK (0xffffull << (63-31)) #define CXL_PSL_SCNTL_An_PM_Shared (0x0000ull << (63-31)) #define CXL_PSL_SCNTL_An_PM_OS (0x0001ull << (63-31)) #define CXL_PSL_SCNTL_An_PM_Process (0x0002ull << (63-31)) #define CXL_PSL_SCNTL_An_PM_AFU (0x0004ull << (63-31)) #define CXL_PSL_SCNTL_An_PM_AFU_PBT (0x0104ull << (63-31)) /* Purge Status (ro) */ #define CXL_PSL_SCNTL_An_Ps_MASK (0x3ull << (63-39)) #define CXL_PSL_SCNTL_An_Ps_Pending (0x1ull << (63-39)) #define CXL_PSL_SCNTL_An_Ps_Complete (0x3ull << (63-39)) /* Purge */ #define CXL_PSL_SCNTL_An_Pc (0x1ull << (63-48)) /* Suspend Status (ro) */ #define CXL_PSL_SCNTL_An_Ss_MASK (0x3ull << (63-55)) #define CXL_PSL_SCNTL_An_Ss_Pending (0x1ull << (63-55)) #define CXL_PSL_SCNTL_An_Ss_Complete (0x3ull << (63-55)) /* Suspend Control */ #define CXL_PSL_SCNTL_An_Sc (0x1ull << (63-63)) /* AFU Slice Enable Status (ro) */ #define CXL_AFU_Cntl_An_ES_MASK (0x7ull << (63-2)) #define CXL_AFU_Cntl_An_ES_Disabled (0x0ull << (63-2)) #define CXL_AFU_Cntl_An_ES_Enabled (0x4ull << (63-2)) /* AFU Slice Enable */ #define CXL_AFU_Cntl_An_E (0x1ull << (63-3)) /* AFU Slice Reset status (ro) */ #define CXL_AFU_Cntl_An_RS_MASK (0x3ull << (63-5)) #define CXL_AFU_Cntl_An_RS_Pending (0x1ull << (63-5)) #define CXL_AFU_Cntl_An_RS_Complete (0x2ull << (63-5)) /* AFU Slice Reset */ #define CXL_AFU_Cntl_An_RA (0x1ull << (63-7)) /****** CXL_SSTP0/1_An ******************************************************/ /* These top bits are for the segment that CONTAINS the segment table */ #define CXL_SSTP0_An_B_SHIFT SLB_VSID_SSIZE_SHIFT #define CXL_SSTP0_An_KS (1ull << (63-2)) #define CXL_SSTP0_An_KP (1ull << (63-3)) #define CXL_SSTP0_An_N (1ull << (63-4)) #define CXL_SSTP0_An_L (1ull << (63-5)) #define CXL_SSTP0_An_C (1ull << (63-6)) #define CXL_SSTP0_An_TA (1ull << (63-7)) #define CXL_SSTP0_An_LP_SHIFT (63-9) /* 2 Bits */ /* And finally, the virtual address & size of the segment table: */ #define CXL_SSTP0_An_SegTableSize_SHIFT (63-31) /* 12 Bits */ #define CXL_SSTP0_An_SegTableSize_MASK \ (((1ull << 12) - 1) << CXL_SSTP0_An_SegTableSize_SHIFT) #define CXL_SSTP0_An_STVA_U_MASK ((1ull << (63-49))-1) #define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1)) #define CXL_SSTP1_An_V (1ull << (63-63)) /****** CXL_PSL_SLBIE_[An] **************************************************/ /* write: */ #define CXL_SLBIE_C PPC_BIT(36) /* Class */ #define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */ #define CXL_SLBIE_SS_SHIFT PPC_BITLSHIFT(38) #define CXL_SLBIE_TA PPC_BIT(38) /* Tags Active */ /* read: */ #define CXL_SLBIE_MAX PPC_BITMASK(24, 31) #define CXL_SLBIE_PENDING PPC_BITMASK(56, 63) /****** Common to all CXL_TLBIA/SLBIA_[An] **********************************/ #define CXL_TLB_SLB_P (1ull) /* Pending (read) */ /****** Common to all CXL_TLB/SLB_IA/IE_[An] registers **********************/ #define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */ #define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */ #define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */ /****** CXL_PSL_AFUSEL ******************************************************/ #define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */ /****** CXL_PSL_DSISR_An ****************************************************/ #define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */ #define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */ #define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */ #define CXL_PSL_DSISR_An_UR (1ull << (63-3)) /* AURP PTE not found */ #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) #define CXL_PSL_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ #define CXL_PSL_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ #define CXL_PSL_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ /* NOTE: Bits 32:63 are undefined if DSISR[DS] = 1 */ #define CXL_PSL_DSISR_An_M DSISR_NOHPTE /* PTE not found */ #define CXL_PSL_DSISR_An_P DSISR_PROTFAULT /* Storage protection violation */ #define CXL_PSL_DSISR_An_A (1ull << (63-37)) /* AFU lock access to write through or cache inhibited storage */ #define CXL_PSL_DSISR_An_S DSISR_ISSTORE /* Access was afu_wr or afu_zero */ #define CXL_PSL_DSISR_An_K DSISR_KEYFAULT /* Access not permitted by virtual page class key protection */ /****** CXL_PSL_TFC_An ******************************************************/ #define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */ #define CXL_PSL_TFC_An_C (1ull << (63-29)) /* Continue (abort transaction) */ #define CXL_PSL_TFC_An_AE (1ull << (63-30)) /* Restart PSL with address error */ #define CXL_PSL_TFC_An_R (1ull << (63-31)) /* Restart PSL transaction */ /* cxl_process_element->software_status */ #define CXL_PE_SOFTWARE_STATE_V (1ul << (31 - 0)) /* Valid */ #define CXL_PE_SOFTWARE_STATE_C (1ul << (31 - 29)) /* Complete */ #define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */ #define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */ /****** CXL_PSL_RXCTL_An (Implementation Specific) ************************** * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x * of the hang pulse frequency. */ #define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL /* SPA->sw_command_status */ #define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL #define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL #define CXL_SPA_SW_CMD_REMOVE 0x0002000000000000ULL #define CXL_SPA_SW_CMD_SUSPEND 0x0003000000000000ULL #define CXL_SPA_SW_CMD_RESUME 0x0004000000000000ULL #define CXL_SPA_SW_CMD_ADD 0x0005000000000000ULL #define CXL_SPA_SW_CMD_UPDATE 0x0006000000000000ULL #define CXL_SPA_SW_STATE_MASK 0x0000ffff00000000ULL #define CXL_SPA_SW_STATE_TERMINATED 0x0000000100000000ULL #define CXL_SPA_SW_STATE_REMOVED 0x0000000200000000ULL #define CXL_SPA_SW_STATE_SUSPENDED 0x0000000300000000ULL #define CXL_SPA_SW_STATE_RESUMED 0x0000000400000000ULL #define CXL_SPA_SW_STATE_ADDED 0x0000000500000000ULL #define CXL_SPA_SW_STATE_UPDATED 0x0000000600000000ULL #define CXL_SPA_SW_PSL_ID_MASK 0x00000000ffff0000ULL #define CXL_SPA_SW_LINK_MASK 0x000000000000ffffULL #define CXL_MAX_SLICES 4 #define MAX_AFU_MMIO_REGS 3 #define CXL_MODE_TIME_SLICED 0x4 #define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) enum cxl_context_status { CLOSED, OPENED, STARTED }; enum prefault_modes { CXL_PREFAULT_NONE, CXL_PREFAULT_WED, CXL_PREFAULT_ALL, }; struct cxl_sste { __be64 esid_data; __be64 vsid_data; }; #define to_cxl_adapter(d) container_of(d, struct cxl, dev) #define to_cxl_afu(d) container_of(d, struct cxl_afu, dev) struct cxl_afu { irq_hw_number_t psl_hwirq; irq_hw_number_t serr_hwirq; char *err_irq_name; char *psl_irq_name; unsigned int serr_virq; void __iomem *p1n_mmio; void __iomem *p2n_mmio; phys_addr_t psn_phys; u64 pp_offset; u64 pp_size; void __iomem *afu_desc_mmio; struct cxl *adapter; struct device dev; struct cdev afu_cdev_s, afu_cdev_m, afu_cdev_d; struct device *chardev_s, *chardev_m, *chardev_d; struct idr contexts_idr; struct dentry *debugfs; struct mutex contexts_lock; struct mutex spa_mutex; spinlock_t afu_cntl_lock; /* AFU error buffer fields and bin attribute for sysfs */ u64 eb_len, eb_offset; struct bin_attribute attr_eb; /* * Only the first part of the SPA is used for the process element * linked list. The only other part that software needs to worry about * is sw_command_status, which we store a separate pointer to. * Everything else in the SPA is only used by hardware */ struct cxl_process_element *spa; __be64 *sw_command_status; unsigned int spa_size; int spa_order; int spa_max_procs; unsigned int psl_virq; /* pointer to the vphb */ struct pci_controller *phb; int pp_irqs; int irqs_max; int num_procs; int max_procs_virtualised; int slice; int modes_supported; int current_mode; int crs_num; u64 crs_len; u64 crs_offset; struct list_head crs; enum prefault_modes prefault_mode; bool psa; bool pp_psa; bool enabled; }; /* AFU refcount management */ static inline struct cxl_afu *cxl_afu_get(struct cxl_afu *afu) { return (get_device(&afu->dev) == NULL) ? NULL : afu; } static inline void cxl_afu_put(struct cxl_afu *afu) { put_device(&afu->dev); } struct cxl_irq_name { struct list_head list; char *name; }; /* * This is a cxl context. If the PSL is in dedicated mode, there will be one * of these per AFU. If in AFU directed there can be lots of these. */ struct cxl_context { struct cxl_afu *afu; /* Problem state MMIO */ phys_addr_t psn_phys; u64 psn_size; /* Used to unmap any mmaps when force detaching */ struct address_space *mapping; struct mutex mapping_lock; struct page *ff_page; bool mmio_err_ff; bool kernelapi; spinlock_t sste_lock; /* Protects segment table entries */ struct cxl_sste *sstp; u64 sstp0, sstp1; unsigned int sst_size, sst_lru; wait_queue_head_t wq; /* pid of the group leader associated with the pid */ struct pid *glpid; /* use mm context associated with this pid for ds faults */ struct pid *pid; spinlock_t lock; /* Protects pending_irq_mask, pending_fault and fault_addr */ /* Only used in PR mode */ u64 process_token; unsigned long *irq_bitmap; /* Accessed from IRQ context */ struct cxl_irq_ranges irqs; struct list_head irq_names; u64 fault_addr; u64 fault_dsisr; u64 afu_err; /* * This status and it's lock pretects start and detach context * from racing. It also prevents detach from racing with * itself */ enum cxl_context_status status; struct mutex status_mutex; /* XXX: Is it possible to need multiple work items at once? */ struct work_struct fault_work; u64 dsisr; u64 dar; struct cxl_process_element *elem; int pe; /* process element handle */ u32 irq_count; bool pe_inserted; bool master; bool kernel; bool pending_irq; bool pending_fault; bool pending_afu_err; struct rcu_head rcu; }; struct cxl { void __iomem *p1_mmio; void __iomem *p2_mmio; irq_hw_number_t err_hwirq; unsigned int err_virq; spinlock_t afu_list_lock; struct cxl_afu *afu[CXL_MAX_SLICES]; struct device dev; struct dentry *trace; struct dentry *psl_err_chk; struct dentry *debugfs; char *irq_name; struct bin_attribute cxl_attr; int adapter_num; int user_irqs; u64 afu_desc_off; u64 afu_desc_size; u64 ps_off; u64 ps_size; u16 psl_rev; u16 base_image; u8 vsec_status; u8 caia_major; u8 caia_minor; u8 slices; bool user_image_loaded; bool perst_loads_image; bool perst_select_user; bool perst_same_image; }; int cxl_alloc_one_irq(struct cxl *adapter); void cxl_release_one_irq(struct cxl *adapter, int hwirq); int cxl_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num); void cxl_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter); int cxl_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq); int cxl_update_image_control(struct cxl *adapter); int cxl_reset(struct cxl *adapter); /* common == phyp + powernv */ struct cxl_process_element_common { __be32 tid; __be32 pid; __be64 csrp; __be64 aurp0; __be64 aurp1; __be64 sstp0; __be64 sstp1; __be64 amr; u8 reserved3[4]; __be64 wed; } __packed; /* just powernv */ struct cxl_process_element { __be64 sr; __be64 SPOffset; __be64 sdr; __be64 haurp; __be32 ctxtime; __be16 ivte_offsets[4]; __be16 ivte_ranges[4]; __be32 lpid; struct cxl_process_element_common common; __be32 software_state; } __packed; static inline bool cxl_adapter_link_ok(struct cxl *cxl) { struct pci_dev *pdev; pdev = to_pci_dev(cxl->dev.parent); return !pci_channel_offline(pdev); } static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg) { WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); return cxl->p1_mmio + cxl_reg_off(reg); } static inline void cxl_p1_write(struct cxl *cxl, cxl_p1_reg_t reg, u64 val) { if (likely(cxl_adapter_link_ok(cxl))) out_be64(_cxl_p1_addr(cxl, reg), val); } static inline u64 cxl_p1_read(struct cxl *cxl, cxl_p1_reg_t reg) { if (likely(cxl_adapter_link_ok(cxl))) return in_be64(_cxl_p1_addr(cxl, reg)); else return ~0ULL; } static inline void __iomem *_cxl_p1n_addr(struct cxl_afu *afu, cxl_p1n_reg_t reg) { WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); return afu->p1n_mmio + cxl_reg_off(reg); } static inline void cxl_p1n_write(struct cxl_afu *afu, cxl_p1n_reg_t reg, u64 val) { if (likely(cxl_adapter_link_ok(afu->adapter))) out_be64(_cxl_p1n_addr(afu, reg), val); } static inline u64 cxl_p1n_read(struct cxl_afu *afu, cxl_p1n_reg_t reg) { if (likely(cxl_adapter_link_ok(afu->adapter))) return in_be64(_cxl_p1n_addr(afu, reg)); else return ~0ULL; } static inline void __iomem *_cxl_p2n_addr(struct cxl_afu *afu, cxl_p2n_reg_t reg) { return afu->p2n_mmio + cxl_reg_off(reg); } static inline void cxl_p2n_write(struct cxl_afu *afu, cxl_p2n_reg_t reg, u64 val) { if (likely(cxl_adapter_link_ok(afu->adapter))) out_be64(_cxl_p2n_addr(afu, reg), val); } static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg) { if (likely(cxl_adapter_link_ok(afu->adapter))) return in_be64(_cxl_p2n_addr(afu, reg)); else return ~0ULL; } static inline u64 cxl_afu_cr_read64(struct cxl_afu *afu, int cr, u64 off) { if (likely(cxl_adapter_link_ok(afu->adapter))) return in_le64((afu)->afu_desc_mmio + (afu)->crs_offset + ((cr) * (afu)->crs_len) + (off)); else return ~0ULL; } static inline u32 cxl_afu_cr_read32(struct cxl_afu *afu, int cr, u64 off) { if (likely(cxl_adapter_link_ok(afu->adapter))) return in_le32((afu)->afu_desc_mmio + (afu)->crs_offset + ((cr) * (afu)->crs_len) + (off)); else return 0xffffffff; } u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off); u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off); ssize_t cxl_afu_read_err_buffer(struct cxl_afu *afu, char *buf, loff_t off, size_t count); struct cxl_calls { void (*cxl_slbia)(struct mm_struct *mm); struct module *owner; }; int register_cxl_calls(struct cxl_calls *calls); void unregister_cxl_calls(struct cxl_calls *calls); int cxl_alloc_adapter_nr(struct cxl *adapter); void cxl_remove_adapter_nr(struct cxl *adapter); int cxl_alloc_spa(struct cxl_afu *afu); void cxl_release_spa(struct cxl_afu *afu); int cxl_file_init(void); void cxl_file_exit(void); int cxl_register_adapter(struct cxl *adapter); int cxl_register_afu(struct cxl_afu *afu); int cxl_chardev_d_afu_add(struct cxl_afu *afu); int cxl_chardev_m_afu_add(struct cxl_afu *afu); int cxl_chardev_s_afu_add(struct cxl_afu *afu); void cxl_chardev_afu_remove(struct cxl_afu *afu); void cxl_context_detach_all(struct cxl_afu *afu); void cxl_context_free(struct cxl_context *ctx); void cxl_context_detach(struct cxl_context *ctx); int cxl_sysfs_adapter_add(struct cxl *adapter); void cxl_sysfs_adapter_remove(struct cxl *adapter); int cxl_sysfs_afu_add(struct cxl_afu *afu); void cxl_sysfs_afu_remove(struct cxl_afu *afu); int cxl_sysfs_afu_m_add(struct cxl_afu *afu); void cxl_sysfs_afu_m_remove(struct cxl_afu *afu); int cxl_afu_activate_mode(struct cxl_afu *afu, int mode); int _cxl_afu_deactivate_mode(struct cxl_afu *afu, int mode); int cxl_afu_deactivate_mode(struct cxl_afu *afu); int cxl_afu_select_best_mode(struct cxl_afu *afu); int cxl_register_psl_irq(struct cxl_afu *afu); void cxl_release_psl_irq(struct cxl_afu *afu); int cxl_register_psl_err_irq(struct cxl *adapter); void cxl_release_psl_err_irq(struct cxl *adapter); int cxl_register_serr_irq(struct cxl_afu *afu); void cxl_release_serr_irq(struct cxl_afu *afu); int afu_register_irqs(struct cxl_context *ctx, u32 count); void afu_release_irqs(struct cxl_context *ctx, void *cookie); void afu_irq_name_free(struct cxl_context *ctx); irqreturn_t cxl_slice_irq_err(int irq, void *data); int cxl_debugfs_init(void); void cxl_debugfs_exit(void); int cxl_debugfs_adapter_add(struct cxl *adapter); void cxl_debugfs_adapter_remove(struct cxl *adapter); int cxl_debugfs_afu_add(struct cxl_afu *afu); void cxl_debugfs_afu_remove(struct cxl_afu *afu); void cxl_handle_fault(struct work_struct *work); void cxl_prefault(struct cxl_context *ctx, u64 wed); struct cxl *get_cxl_adapter(int num); int cxl_alloc_sst(struct cxl_context *ctx); void init_cxl_native(void); struct cxl_context *cxl_context_alloc(void); int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, struct address_space *mapping); void cxl_context_free(struct cxl_context *ctx); int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma); unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq, irq_handler_t handler, void *cookie, const char *name); void cxl_unmap_irq(unsigned int virq, void *cookie); int __detach_context(struct cxl_context *ctx); /* This matches the layout of the H_COLLECT_CA_INT_INFO retbuf */ struct cxl_irq_info { u64 dsisr; u64 dar; u64 dsr; u32 pid; u32 tid; u64 afu_err; u64 errstat; u64 padding[3]; /* to match the expected retbuf size for plpar_hcall9 */ }; void cxl_assign_psn_space(struct cxl_context *ctx); int cxl_attach_process(struct cxl_context *ctx, bool kernel, u64 wed, u64 amr); int cxl_detach_process(struct cxl_context *ctx); int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info); int cxl_ack_irq(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask); int cxl_check_error(struct cxl_afu *afu); int cxl_afu_slbia(struct cxl_afu *afu); int cxl_tlb_slb_invalidate(struct cxl *adapter); int cxl_afu_disable(struct cxl_afu *afu); int __cxl_afu_reset(struct cxl_afu *afu); int cxl_afu_check_and_enable(struct cxl_afu *afu); int cxl_psl_purge(struct cxl_afu *afu); void cxl_stop_trace(struct cxl *cxl); int cxl_pci_vphb_add(struct cxl_afu *afu); void cxl_pci_vphb_reconfigure(struct cxl_afu *afu); void cxl_pci_vphb_remove(struct cxl_afu *afu); extern struct pci_driver cxl_pci_driver; int afu_allocate_irqs(struct cxl_context *ctx, u32 count); int afu_open(struct inode *inode, struct file *file); int afu_release(struct inode *inode, struct file *file); long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg); int afu_mmap(struct file *file, struct vm_area_struct *vm); unsigned int afu_poll(struct file *file, struct poll_table_struct *poll); ssize_t afu_read(struct file *file, char __user *buf, size_t count, loff_t *off); extern const struct file_operations afu_fops; #endif |