1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _LDC_IMPL_H 28 #define _LDC_IMPL_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/ddi.h> 38 #include <sys/sunddi.h> 39 #include <sys/ioctl.h> 40 41 /* Memory map table size */ 42 #define MTBL_MAX_SIZE 65536 /* 64K */ 43 44 /* Define LDC Queue info */ 45 #define LDC_PACKET_SHIFT 6 46 #define LDC_QUEUE_ENTRIES 128 47 #define LDC_QUEUE_SIZE (LDC_QUEUE_ENTRIES << LDC_PACKET_SHIFT) 48 #define LDC_STREAM_MTU (LDC_QUEUE_SIZE >> 1) 49 50 /* 51 * LDC Reliable mode - initial packet seqid 52 * - If peer initiated handshake, RDX should contain init_seqid + 1 53 * - If this endpoint initiated handshake first data packet should 54 * contain the message init_seqid + 1 55 */ 56 #define LDC_INIT_SEQID 0x0 57 58 /* LDC Message types */ 59 #define LDC_CTRL 0x01 /* Control Pkt */ 60 #define LDC_DATA 0x02 /* Data Pkt */ 61 #define LDC_ERR 0x10 /* Error Pkt */ 62 63 /* LDC Message Subtypes */ 64 #define LDC_INFO 0x01 /* Control/Data/Error info pkt */ 65 #define LDC_ACK 0x02 /* Control/Data ACK */ 66 #define LDC_NACK 0x04 /* Control/Data NACK */ 67 68 /* LDC Control Messages */ 69 #define LDC_VER 0x01 /* Version message */ 70 #define LDC_RTS 0x02 /* Request to Send */ 71 #define LDC_RTR 0x03 /* Ready To Receive */ 72 #define LDC_RDX 0x04 /* Ready for data exchange */ 73 74 #define LDC_CTRL_MASK 0x0f /* Mask to read control bits */ 75 76 /* LDC Channel Transport State (tstate) */ 77 #define TS_TXQ_RDY 0x01 /* allocated TX queue */ 78 #define TS_RXQ_RDY 0x02 /* allocated RX queue */ 79 #define TS_INIT (TS_TXQ_RDY | TS_RXQ_RDY) 80 #define TS_QCONF_RDY 0x04 /* registered queues with HV */ 81 #define TS_CNEX_RDY 0x08 /* registered channel with cnex */ 82 #define TS_OPEN (TS_INIT | TS_QCONF_RDY | TS_CNEX_RDY) 83 #define TS_LINK_READY 0x10 /* both endpts registered Rx queues */ 84 #define TS_READY (TS_OPEN | TS_LINK_READY) 85 #define TS_VER_DONE 0x20 /* negotiated version */ 86 #define TS_VREADY (TS_READY | TS_VER_DONE) 87 #define TS_HSHAKE_DONE 0x40 /* completed handshake */ 88 #define TS_UP (TS_READY | TS_VER_DONE | TS_HSHAKE_DONE) 89 90 /* LDC Channel Transport Handshake states */ 91 #define TS_SENT_VER 0x01 /* Sent version */ 92 #define TS_SENT_RTS 0x02 /* Sent RTS */ 93 #define TS_RCVD_RTR 0x04 /* Received RTR */ 94 #define TS_SENT_RDX 0x08 /* Sent RDX */ 95 #define TS_RCVD_VER 0x10 /* Received version */ 96 #define TS_RCVD_RTS 0x20 /* Received RTS */ 97 #define TS_SENT_RTR 0x40 /* Sent RTR */ 98 #define TS_RCVD_RDX 0x80 /* Received RDX */ 99 100 /* LDC MSG Envelope */ 101 #define LDC_LEN_MASK 0x3F 102 #define LDC_FRAG_MASK 0xC0 103 104 #define LDC_FRAG_START 0x40 /* frag_info = 0x01 */ 105 #define LDC_FRAG_STOP 0x80 /* frag_info = 0x02 */ 106 #define LDC_FRAG_CONT 0x00 /* frag_info = 0x00 */ 107 108 /* 109 * LDC will retry LDC_MAX_RETRIES times when sending or 110 * receiving data or if the HV returns back EWOULDBLOCK. 111 * Between each retry it will wait LDC_DELAY usecs. 112 */ 113 #define LDC_MAX_RETRIES 1000 114 #define LDC_DELAY 1 115 116 /* 117 * LDC Version information 118 */ 119 #define LDC_PAYLOAD_VER_OFF 8 /* offset of version in payload */ 120 121 typedef struct ldc_ver { 122 uint16_t major; 123 uint16_t minor; 124 } ldc_ver_t; 125 126 /* 127 * Each guest consists of one or more LDC endpoints represented by a ldc_chan 128 * structure. Each ldc_chan structure points to a ldc_mtbl structure that 129 * contains information about the map table associated with this LDC endpoint. 130 * The map table contains the list of pages being shared by this guest over 131 * this endpoint with the guest at the other end of this endpoint. Each LDC 132 * endpoint also points to a list of memory handles used to bind and export 133 * memory segments from this guest. If a memory segment is bound, it points to 134 * a memory segment structure, which inturn consists of an array of ldc_page 135 * structure for all the pages within that segment. Each ldc_page structure 136 * contains information about the shared page and also points to the 137 * corresponding entry in the map table. 138 * 139 * Each LDC endpoint also points to a list of ldc_dring structures that refer 140 * to both imported and exported descriptor rings. If it is a exported 141 * descriptor ring, it then points to memory handle/memseg corresponding to 142 * the region of memory associated with the descriptor ring. 143 * 144 * +----------+ +----------+ +----------+ 145 * | ldc_chan |-->| ldc_chan |-->| ldc_chan |-->.... 146 * +----------+ +----------+ +----------+ 147 * | | | 148 * | | | 149 * | | | +-----------+ +-----------+ 150 * | | +----->| ldc_dring |---->| ldc_dring |---->...... 151 * | | +-----------+ +-----------+ 152 * | | | 153 * | | +----------------------------+ 154 * | | | 155 * | | v 156 * | | +----------+ +----------+ +----------+ 157 * | +----->| ldc_mhdl |---->| ldc_mhdl |---->| ldc_mhdl |---> .... 158 * | +----------+ +----------+ +----------+ 159 * v | | 160 * +----------+ | +------------+ | +------------+ 161 * | ldc_mtbl |--+ +--->| ldc_memseg |-----+ +--->| ldc_memseg | 162 * +----------+ | +------------+ | +------------+ 163 * | | | | | 164 * v v v | v 165 * +--------------+ +----------+ +--------+ | +--------+ 166 * | ldc_mte_slot |<--------| ldc_page | | cookie | | | cookie | 167 * +--------------+ +----------+ +--------+ | +--------+ 168 * | ldc_mte_slot |<--------| ldc_page | | cookie | v 169 * +--------------+ +----------+ +--------+ +----------+ 170 * | ldc_mte_slot |<-----------------------------------| ldc_page | 171 * +--------------+ +----------+ 172 * | ldc_mte_slot | 173 * +--------------+ 174 * | ...... |/ +------------+ 175 * +--------------+ | entry | 176 * | ldc_mte_slot | +------------+ 177 * +--------------+ | inv_cookie | 178 * \ +------------+ 179 * 180 */ 181 182 /* 183 * Message format of each packet sent over the LDC channel. 184 * Each packet is 64-bytes long. 185 * 186 * Each packet that is sent over LDC can contain either data or acks. 187 * The type will reflect the contents. The len will contain in bytes 188 * the amount of data being sent. In the case of ACKs, the seqid and 189 * data fields will contain the SEQIDs of messages for which ACKs are 190 * being sent. 191 * 192 * Raw pkt format: 193 * 194 * +------------------------------------------------------+ 195 * 0 - 7 | data payload | 196 * +------------------------------------------------------+ 197 * 198 * Unreliable pkt format: 199 * 200 * +------------------------------------------------------+ 201 * 0 | seqid | env | ctrl | stype | type | 202 * +------------------------------------------------------+ 203 * 1 - 7 | data payload | 204 * +------------------------------------------------------+ 205 * 206 * Reliable pkt format: 207 * 208 * +------------------------------------------------------+ 209 * 0 | seqid | env | ctrl | stype | type | 210 * +------------------------------------------------------+ 211 * 1 | ackid | unused | 212 * +------------------------------------------------------+ 213 * 2 - 7 | data payload | 214 * +------------------------------------------------------+ 215 */ 216 217 typedef struct ldc_msg { 218 union { 219 struct { 220 uint8_t _type; /* Message type */ 221 uint8_t _stype; /* Message subtype */ 222 uint8_t _ctrl; /* Control/Error Message */ 223 uint8_t _env; /* Message Envelope */ 224 uint32_t _seqid; /* Sequence ID */ 225 226 union { 227 uint8_t _ud[LDC_PAYLOAD_SIZE_UNRELIABLE]; 228 /* Unreliable data payload */ 229 struct { 230 uint32_t _unused; /* unused */ 231 uint32_t _ackid; /* ACK ID */ 232 uint8_t _rd[LDC_PAYLOAD_SIZE_RELIABLE]; 233 /* Reliable data payload */ 234 } _rl; 235 } _data; 236 } _tpkt; 237 238 uint8_t _raw[LDC_PAYLOAD_SIZE_RAW]; 239 } _pkt; 240 241 } ldc_msg_t; 242 243 #define raw _pkt._raw 244 #define type _pkt._tpkt._type 245 #define stype _pkt._tpkt._stype 246 #define ctrl _pkt._tpkt._ctrl 247 #define env _pkt._tpkt._env 248 #define seqid _pkt._tpkt._seqid 249 #define udata _pkt._tpkt._data._ud 250 #define ackid _pkt._tpkt._data._rl._ackid 251 #define rdata _pkt._tpkt._data._rl._rd 252 253 /* 254 * LDC Map Table Entry (MTE) 255 * 256 * 6 6 1 1 1 257 * |3 0| psz| 3| 1| 0| 9| 8| 7|6|5|4| 0| 258 * +------+--------------------------+----+----+--+--+--+--+-+-+-+-------+ 259 * | rsvd | PFN | 0 | 0 |CW|CR|IW|IR|X|W|R| pgszc | 260 * +------+--------------------------+----+----+--+--+--+--+-+-+-+-------+ 261 * | hv invalidation cookie | 262 * +---------------------------------------------------------------------+ 263 */ 264 typedef union { 265 struct { 266 uint64_t _rsvd2:8, /* <63:56> reserved */ 267 rpfn:43, /* <55:13> real pfn */ 268 _rsvd1:2, /* <12:11> reserved */ 269 cw:1, /* <10> copy write access */ 270 cr:1, /* <9> copy read perm */ 271 iw:1, /* <8> iommu write perm */ 272 ir:1, /* <7> iommu read perm */ 273 x:1, /* <6> execute perm */ 274 w:1, /* <5> write perm */ 275 r:1, /* <4> read perm */ 276 pgszc:4; /* <3:0> pgsz code */ 277 } mte_bit; 278 279 uint64_t ll; 280 281 } ldc_mte_t; 282 283 #define mte_rpfn mte_bit.rpfn 284 #define mte_cw mte_bit.cw 285 #define mte_cr mte_bit.cr 286 #define mte_iw mte_bit.iw 287 #define mte_ir mte_bit.ir 288 #define mte_x mte_bit.x 289 #define mte_w mte_bit.w 290 #define mte_r mte_bit.r 291 #define mte_pgszc mte_bit.pgszc 292 293 #define MTE_BSZS_SHIFT(sz) ((sz) * 3) 294 #define MTEBYTES(sz) (MMU_PAGESIZE << MTE_BSZS_SHIFT(sz)) 295 #define MTEPAGES(sz) (1 << MTE_BSZS_SHIFT(sz)) 296 #define MTE_PAGE_SHIFT(sz) (MMU_PAGESHIFT + MTE_BSZS_SHIFT(sz)) 297 #define MTE_PAGE_OFFSET(sz) (MTEBYTES(sz) - 1) 298 #define MTE_PAGEMASK(sz) (~MTE_PAGE_OFFSET(sz)) 299 #define MTE_PFNMASK(sz) (~(MTE_PAGE_OFFSET(sz) >> MMU_PAGESHIFT)) 300 301 /* 302 * LDC Map Table Slot 303 */ 304 typedef struct ldc_mte_slot { 305 ldc_mte_t entry; 306 uint64_t cookie; 307 } ldc_mte_slot_t; 308 309 /* 310 * LDC Memory Map Table 311 * 312 * Each LDC has a memory map table it uses to list all the pages 313 * it exporting to its peer over the channel. This structure 314 * contains information about the map table and is pointed to 315 * by the ldc_chan structure. 316 */ 317 typedef struct ldc_mtbl { 318 kmutex_t lock; /* Table lock */ 319 size_t size; /* Table size (in bytes) */ 320 uint64_t next_entry; /* Next entry to use */ 321 uint64_t num_entries; /* Num entries in table */ 322 uint64_t num_avail; /* Num of available entries */ 323 ldc_mte_slot_t *table; /* The table itself */ 324 } ldc_mtbl_t; 325 326 /* 327 * LDC page and memory segment information 328 */ 329 typedef struct ldc_page { 330 uintptr_t raddr; /* Exported page RA */ 331 uint64_t offset; /* Exported page offset */ 332 size_t size; /* Exported page size */ 333 uint64_t index; /* Index in map table */ 334 ldc_mte_slot_t *mte; /* Map table entry */ 335 } ldc_page_t; 336 337 typedef struct ldc_memseg { 338 caddr_t vaddr; /* Exported segment VA */ 339 uintptr_t raddr; /* Exported segment VA */ 340 size_t size; /* Exported segment size */ 341 uint64_t npages; /* Number of pages */ 342 ldc_page_t *pages; /* Array of exported pages */ 343 uint32_t ncookies; /* Number of cookies */ 344 ldc_mem_cookie_t *cookies; 345 uint64_t next_cookie; /* Index to next cookie */ 346 } ldc_memseg_t; 347 348 /* 349 * LDC Cookie address format 350 * 351 * 6 6 m+n 352 * |3| 0| | m| 0| 353 * +-+-------+----------+-------------------+-------------------+ 354 * |X| pgszc | rsvd | table_idx | page_offset | 355 * +-+-------+----------+-------------------+-------------------+ 356 */ 357 #define LDC_COOKIE_PGSZC_MASK 0x7 358 #define LDC_COOKIE_PGSZC_SHIFT 60 359 360 /* 361 * LDC Memory handle 362 */ 363 typedef struct ldc_chan ldc_chan_t; 364 365 typedef struct ldc_mhdl { 366 kmutex_t lock; /* Mutex for memory handle */ 367 ldc_mstatus_t status; /* Memory map status */ 368 369 uint8_t mtype; /* Type of sharing */ 370 uint8_t perm; /* Access permissions */ 371 boolean_t myshadow; /* TRUE=alloc'd shadow mem */ 372 373 ldc_chan_t *ldcp; /* Pointer to channel struct */ 374 ldc_memseg_t *memseg; /* Bound memory segment */ 375 struct ldc_mhdl *next; /* Next memory handle */ 376 } ldc_mhdl_t; 377 378 /* 379 * LDC Descriptor rings 380 */ 381 382 typedef struct ldc_dring { 383 kmutex_t lock; /* Desc ring lock */ 384 ldc_mstatus_t status; /* Desc ring status */ 385 386 uint32_t dsize; /* Descriptor size */ 387 uint32_t length; /* Descriptor ring length */ 388 uint64_t size; /* Desc ring size (in bytes) */ 389 caddr_t base; /* Descriptor ring base addr */ 390 391 ldc_chan_t *ldcp; /* Pointer to bound channel */ 392 ldc_mem_handle_t mhdl; /* Mem handle to desc ring */ 393 394 struct ldc_dring *ch_next; /* Next dring in channel */ 395 struct ldc_dring *next; /* Next dring overall */ 396 397 } ldc_dring_t; 398 399 400 /* 401 * Channel specific information is kept in a separate 402 * structure. These are then stored on a array indexed 403 * by the channel number. 404 */ 405 struct ldc_chan { 406 ldc_chan_t *next; /* Next channel */ 407 408 kmutex_t lock; /* Channel lock */ 409 uint64_t id; /* Channel ID */ 410 ldc_status_t status; /* Channel status */ 411 uint32_t tstate; /* Channel transport state */ 412 uint32_t hstate; /* Channel transport handshake state */ 413 414 ldc_dev_t devclass; /* Associated device class */ 415 uint64_t devinst; /* Associated device instance */ 416 ldc_mode_t mode; /* Channel mode */ 417 418 uint64_t mtu; /* Max TU size (streaming for now) */ 419 420 ldc_ver_t version; /* Channel version */ 421 uint32_t next_vidx; /* Next version to match */ 422 423 uint_t (*cb)(uint64_t event, caddr_t arg); 424 caddr_t cb_arg; /* Channel callback and arg */ 425 boolean_t cb_inprogress; /* Channel callback in progress */ 426 boolean_t cb_enabled; /* Channel callbacks are enabled */ 427 428 boolean_t intr_pending; /* TRUE if interrupts are pending */ 429 430 uint64_t tx_q_entries; /* Num entries in transmit queue */ 431 uint64_t tx_q_va; /* Virtual addr of transmit queue */ 432 uint64_t tx_q_ra; /* Real addr of transmit queue */ 433 uint64_t tx_head; /* Tx queue head */ 434 uint64_t tx_ackd_head; /* Tx queue ACKd head (Reliable) */ 435 uint64_t tx_tail; /* Tx queue tail */ 436 437 uint64_t rx_q_entries; /* Num entries in receive queue */ 438 uint64_t rx_q_va; /* Virtual addr of receive queue */ 439 uint64_t rx_q_ra; /* Real addr of receive queue */ 440 441 uint64_t link_state; /* Underlying HV channel state */ 442 443 ldc_mtbl_t *mtbl; /* Memory table used by channel */ 444 ldc_mhdl_t *mhdl_list; /* List of memory handles */ 445 kmutex_t mlist_lock; /* Mem handle list lock */ 446 447 ldc_dring_t *exp_dring_list; /* Exported desc ring list */ 448 kmutex_t exp_dlist_lock; /* Lock for exported desc ring list */ 449 ldc_dring_t *imp_dring_list; /* Imported desc ring list */ 450 kmutex_t imp_dlist_lock; /* Lock for imported desc ring list */ 451 452 uint8_t pkt_payload; /* Size of packet payload */ 453 454 uint32_t first_fragment; /* Seqid of first msg fragment */ 455 uint32_t last_msg_snt; /* Seqid of last packet sent */ 456 uint32_t last_ack_rcd; /* Seqid of last ACK recd */ 457 uint32_t last_msg_rcd; /* Seqid of last packet received */ 458 459 uint32_t stream_remains; /* Number of bytes in stream */ 460 /* packet buffer */ 461 uint32_t stream_offset; /* Offset into packet buffer for */ 462 /* next read */ 463 uint8_t *stream_bufferp; /* Stream packet buffer */ 464 465 int (*read_p)(ldc_chan_t *ldcp, caddr_t bufferp, 466 size_t *sizep); 467 int (*write_p)(ldc_chan_t *ldcp, caddr_t bufferp, 468 size_t *sizep); 469 }; 470 471 472 /* 473 * LDC module soft state structure 474 */ 475 typedef struct ldc_soft_state { 476 kmutex_t lock; /* Protects ldc_soft_state_t */ 477 ldc_cnex_t cinfo; /* channel nexus info */ 478 uint64_t channel_count; /* Number of channels */ 479 uint64_t channels_open; /* Number of open channels */ 480 ldc_chan_t *chan_list; /* List of LDC endpoints */ 481 ldc_dring_t *dring_list; /* Descriptor rings (for export) */ 482 } ldc_soft_state_t; 483 484 #ifdef __cplusplus 485 } 486 #endif 487 488 #endif /* _LDC_IMPL_H */ 489