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