drivers/misc/cxl/cxl.h

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