1 /* 2 * RapidIO interconnect services 3 * (RapidIO Interconnect Specification, http://www.rapidio.org) 4 * 5 * Copyright 2005 MontaVista Software, Inc. 6 * Matt Porter <mporter@kernel.crashing.org> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #ifndef LINUX_RIO_H 15 #define LINUX_RIO_H 16 17 #include <linux/types.h> 18 #include <linux/ioport.h> 19 #include <linux/list.h> 20 #include <linux/errno.h> 21 #include <linux/device.h> 22 #include <linux/rio_regs.h> 23 #include <linux/mod_devicetable.h> 24 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 25 #include <linux/dmaengine.h> 26 #endif 27 28 #define RIO_NO_HOPCOUNT -1 29 #define RIO_INVALID_DESTID 0xffff 30 31 #define RIO_MAX_MPORTS 8 32 #define RIO_MAX_MPORT_RESOURCES 16 33 #define RIO_MAX_DEV_RESOURCES 16 34 #define RIO_MAX_MPORT_NAME 40 35 36 #define RIO_GLOBAL_TABLE 0xff /* Indicates access of a switch's 37 global routing table if it 38 has multiple (or per port) 39 tables */ 40 41 #define RIO_INVALID_ROUTE 0xff /* Indicates that a route table 42 entry is invalid (no route 43 exists for the device ID) */ 44 45 #define RIO_MAX_ROUTE_ENTRIES(size) (size ? (1 << 16) : (1 << 8)) 46 #define RIO_ANY_DESTID(size) (size ? 0xffff : 0xff) 47 48 #define RIO_MAX_MBOX 4 49 #define RIO_MAX_MSG_SIZE 0x1000 50 51 /* 52 * Error values that may be returned by RIO functions. 53 */ 54 #define RIO_SUCCESSFUL 0x00 55 #define RIO_BAD_SIZE 0x81 56 57 /* 58 * For RIO devices, the region numbers are assigned this way: 59 * 60 * 0 RapidIO outbound doorbells 61 * 1-15 RapidIO memory regions 62 * 63 * For RIO master ports, the region number are assigned this way: 64 * 65 * 0 RapidIO inbound doorbells 66 * 1 RapidIO inbound mailboxes 67 * 2 RapidIO outbound mailboxes 68 */ 69 #define RIO_DOORBELL_RESOURCE 0 70 #define RIO_INB_MBOX_RESOURCE 1 71 #define RIO_OUTB_MBOX_RESOURCE 2 72 73 #define RIO_PW_MSG_SIZE 64 74 75 /* 76 * A component tag value (stored in the component tag CSR) is used as device's 77 * unique identifier assigned during enumeration. Besides being used for 78 * identifying switches (which do not have device ID register), it also is used 79 * by error management notification and therefore has to be assigned 80 * to endpoints as well. 81 */ 82 #define RIO_CTAG_RESRVD 0xfffe0000 /* Reserved */ 83 #define RIO_CTAG_UDEVID 0x0001ffff /* Unique device identifier */ 84 85 extern struct bus_type rio_bus_type; 86 extern struct class rio_mport_class; 87 88 struct rio_mport; 89 struct rio_dev; 90 union rio_pw_msg; 91 92 /** 93 * struct rio_switch - RIO switch info 94 * @node: Node in global list of switches 95 * @route_table: Copy of switch routing table 96 * @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0 97 * @ops: pointer to switch-specific operations 98 * @lock: lock to serialize operations updates 99 * @nextdev: Array of per-port pointers to the next attached device 100 */ 101 struct rio_switch { 102 struct list_head node; 103 u8 *route_table; 104 u32 port_ok; 105 struct rio_switch_ops *ops; 106 spinlock_t lock; 107 struct rio_dev *nextdev[0]; 108 }; 109 110 /** 111 * struct rio_switch_ops - Per-switch operations 112 * @owner: The module owner of this structure 113 * @add_entry: Callback for switch-specific route add function 114 * @get_entry: Callback for switch-specific route get function 115 * @clr_table: Callback for switch-specific clear route table function 116 * @set_domain: Callback for switch-specific domain setting function 117 * @get_domain: Callback for switch-specific domain get function 118 * @em_init: Callback for switch-specific error management init function 119 * @em_handle: Callback for switch-specific error management handler function 120 * 121 * Defines the operations that are necessary to initialize/control 122 * a particular RIO switch device. 123 */ 124 struct rio_switch_ops { 125 struct module *owner; 126 int (*add_entry) (struct rio_mport *mport, u16 destid, u8 hopcount, 127 u16 table, u16 route_destid, u8 route_port); 128 int (*get_entry) (struct rio_mport *mport, u16 destid, u8 hopcount, 129 u16 table, u16 route_destid, u8 *route_port); 130 int (*clr_table) (struct rio_mport *mport, u16 destid, u8 hopcount, 131 u16 table); 132 int (*set_domain) (struct rio_mport *mport, u16 destid, u8 hopcount, 133 u8 sw_domain); 134 int (*get_domain) (struct rio_mport *mport, u16 destid, u8 hopcount, 135 u8 *sw_domain); 136 int (*em_init) (struct rio_dev *dev); 137 int (*em_handle) (struct rio_dev *dev, u8 swport); 138 }; 139 140 enum rio_device_state { 141 RIO_DEVICE_INITIALIZING, 142 RIO_DEVICE_RUNNING, 143 RIO_DEVICE_GONE, 144 RIO_DEVICE_SHUTDOWN, 145 }; 146 147 /** 148 * struct rio_dev - RIO device info 149 * @global_list: Node in list of all RIO devices 150 * @net_list: Node in list of RIO devices in a network 151 * @net: Network this device is a part of 152 * @do_enum: Enumeration flag 153 * @did: Device ID 154 * @vid: Vendor ID 155 * @device_rev: Device revision 156 * @asm_did: Assembly device ID 157 * @asm_vid: Assembly vendor ID 158 * @asm_rev: Assembly revision 159 * @efptr: Extended feature pointer 160 * @pef: Processing element features 161 * @swpinfo: Switch port info 162 * @src_ops: Source operation capabilities 163 * @dst_ops: Destination operation capabilities 164 * @comp_tag: RIO component tag 165 * @phys_efptr: RIO device extended features pointer 166 * @phys_rmap: LP-Serial Register Map Type (1 or 2) 167 * @em_efptr: RIO Error Management features pointer 168 * @dma_mask: Mask of bits of RIO address this device implements 169 * @driver: Driver claiming this device 170 * @dev: Device model device 171 * @riores: RIO resources this device owns 172 * @pwcback: port-write callback function for this device 173 * @destid: Network destination ID (or associated destid for switch) 174 * @hopcount: Hopcount to this device 175 * @prev: Previous RIO device connected to the current one 176 * @state: device state 177 * @rswitch: struct rio_switch (if valid for this device) 178 */ 179 struct rio_dev { 180 struct list_head global_list; /* node in list of all RIO devices */ 181 struct list_head net_list; /* node in per net list */ 182 struct rio_net *net; /* RIO net this device resides in */ 183 bool do_enum; 184 u16 did; 185 u16 vid; 186 u32 device_rev; 187 u16 asm_did; 188 u16 asm_vid; 189 u16 asm_rev; 190 u16 efptr; 191 u32 pef; 192 u32 swpinfo; 193 u32 src_ops; 194 u32 dst_ops; 195 u32 comp_tag; 196 u32 phys_efptr; 197 u32 phys_rmap; 198 u32 em_efptr; 199 u64 dma_mask; 200 struct rio_driver *driver; /* RIO driver claiming this device */ 201 struct device dev; /* LDM device structure */ 202 struct resource riores[RIO_MAX_DEV_RESOURCES]; 203 int (*pwcback) (struct rio_dev *rdev, union rio_pw_msg *msg, int step); 204 u16 destid; 205 u8 hopcount; 206 struct rio_dev *prev; 207 atomic_t state; 208 struct rio_switch rswitch[0]; /* RIO switch info */ 209 }; 210 211 #define rio_dev_g(n) list_entry(n, struct rio_dev, global_list) 212 #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list) 213 #define to_rio_dev(n) container_of(n, struct rio_dev, dev) 214 #define sw_to_rio_dev(n) container_of(n, struct rio_dev, rswitch[0]) 215 #define to_rio_mport(n) container_of(n, struct rio_mport, dev) 216 #define to_rio_net(n) container_of(n, struct rio_net, dev) 217 218 /** 219 * struct rio_msg - RIO message event 220 * @res: Mailbox resource 221 * @mcback: Message event callback 222 */ 223 struct rio_msg { 224 struct resource *res; 225 void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot); 226 }; 227 228 /** 229 * struct rio_dbell - RIO doorbell event 230 * @node: Node in list of doorbell events 231 * @res: Doorbell resource 232 * @dinb: Doorbell event callback 233 * @dev_id: Device specific pointer to pass on event 234 */ 235 struct rio_dbell { 236 struct list_head node; 237 struct resource *res; 238 void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info); 239 void *dev_id; 240 }; 241 242 /** 243 * struct rio_mport - RIO master port info 244 * @dbells: List of doorbell events 245 * @pwrites: List of portwrite events 246 * @node: Node in global list of master ports 247 * @nnode: Node in network list of master ports 248 * @net: RIO net this mport is attached to 249 * @lock: lock to synchronize lists manipulations 250 * @iores: I/O mem resource that this master port interface owns 251 * @riores: RIO resources that this master port interfaces owns 252 * @inb_msg: RIO inbound message event descriptors 253 * @outb_msg: RIO outbound message event descriptors 254 * @host_deviceid: Host device ID associated with this master port 255 * @ops: configuration space functions 256 * @id: Port ID, unique among all ports 257 * @index: Port index, unique among all port interfaces of the same type 258 * @sys_size: RapidIO common transport system size 259 * @phys_efptr: RIO port extended features pointer 260 * @phys_rmap: LP-Serial EFB Register Mapping type (1 or 2). 261 * @name: Port name string 262 * @dev: device structure associated with an mport 263 * @priv: Master port private data 264 * @dma: DMA device associated with mport 265 * @nscan: RapidIO network enumeration/discovery operations 266 * @state: mport device state 267 * @pwe_refcnt: port-write enable ref counter to track enable/disable requests 268 */ 269 struct rio_mport { 270 struct list_head dbells; /* list of doorbell events */ 271 struct list_head pwrites; /* list of portwrite events */ 272 struct list_head node; /* node in global list of ports */ 273 struct list_head nnode; /* node in net list of ports */ 274 struct rio_net *net; /* RIO net this mport is attached to */ 275 struct mutex lock; 276 struct resource iores; 277 struct resource riores[RIO_MAX_MPORT_RESOURCES]; 278 struct rio_msg inb_msg[RIO_MAX_MBOX]; 279 struct rio_msg outb_msg[RIO_MAX_MBOX]; 280 int host_deviceid; /* Host device ID */ 281 struct rio_ops *ops; /* low-level architecture-dependent routines */ 282 unsigned char id; /* port ID, unique among all ports */ 283 unsigned char index; /* port index, unique among all port 284 interfaces of the same type */ 285 unsigned int sys_size; /* RapidIO common transport system size. 286 * 0 - Small size. 256 devices. 287 * 1 - Large size, 65536 devices. 288 */ 289 u32 phys_efptr; 290 u32 phys_rmap; 291 unsigned char name[RIO_MAX_MPORT_NAME]; 292 struct device dev; 293 void *priv; /* Master port private data */ 294 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 295 struct dma_device dma; 296 #endif 297 struct rio_scan *nscan; 298 atomic_t state; 299 unsigned int pwe_refcnt; 300 }; 301 302 static inline int rio_mport_is_running(struct rio_mport *mport) 303 { 304 return atomic_read(&mport->state) == RIO_DEVICE_RUNNING; 305 } 306 307 /* 308 * Enumeration/discovery control flags 309 */ 310 #define RIO_SCAN_ENUM_NO_WAIT 0x00000001 /* Do not wait for enum completed */ 311 312 /** 313 * struct rio_net - RIO network info 314 * @node: Node in global list of RIO networks 315 * @devices: List of devices in this network 316 * @switches: List of switches in this network 317 * @mports: List of master ports accessing this network 318 * @hport: Default port for accessing this network 319 * @id: RIO network ID 320 * @dev: Device object 321 * @enum_data: private data specific to a network enumerator 322 * @release: enumerator-specific release callback 323 */ 324 struct rio_net { 325 struct list_head node; /* node in list of networks */ 326 struct list_head devices; /* list of devices in this net */ 327 struct list_head switches; /* list of switches in this net */ 328 struct list_head mports; /* list of ports accessing net */ 329 struct rio_mport *hport; /* primary port for accessing net */ 330 unsigned char id; /* RIO network ID */ 331 struct device dev; 332 void *enum_data; /* private data for enumerator of the network */ 333 void (*release)(struct rio_net *net); 334 }; 335 336 enum rio_link_speed { 337 RIO_LINK_DOWN = 0, /* SRIO Link not initialized */ 338 RIO_LINK_125 = 1, /* 1.25 GBaud */ 339 RIO_LINK_250 = 2, /* 2.5 GBaud */ 340 RIO_LINK_312 = 3, /* 3.125 GBaud */ 341 RIO_LINK_500 = 4, /* 5.0 GBaud */ 342 RIO_LINK_625 = 5 /* 6.25 GBaud */ 343 }; 344 345 enum rio_link_width { 346 RIO_LINK_1X = 0, 347 RIO_LINK_1XR = 1, 348 RIO_LINK_2X = 3, 349 RIO_LINK_4X = 2, 350 RIO_LINK_8X = 4, 351 RIO_LINK_16X = 5 352 }; 353 354 enum rio_mport_flags { 355 RIO_MPORT_DMA = (1 << 0), /* supports DMA data transfers */ 356 RIO_MPORT_DMA_SG = (1 << 1), /* DMA supports HW SG mode */ 357 RIO_MPORT_IBSG = (1 << 2), /* inbound mapping supports SG */ 358 }; 359 360 /** 361 * struct rio_mport_attr - RIO mport device attributes 362 * @flags: mport device capability flags 363 * @link_speed: SRIO link speed value (as defined by RapidIO specification) 364 * @link_width: SRIO link width value (as defined by RapidIO specification) 365 * @dma_max_sge: number of SG list entries that can be handled by DMA channel(s) 366 * @dma_max_size: max number of bytes in single DMA transfer (SG entry) 367 * @dma_align: alignment shift for DMA operations (as for other DMA operations) 368 */ 369 struct rio_mport_attr { 370 int flags; 371 int link_speed; 372 int link_width; 373 374 /* DMA capability info: valid only if RIO_MPORT_DMA flag is set */ 375 int dma_max_sge; 376 int dma_max_size; 377 int dma_align; 378 }; 379 380 /* Low-level architecture-dependent routines */ 381 382 /** 383 * struct rio_ops - Low-level RIO configuration space operations 384 * @lcread: Callback to perform local (master port) read of config space. 385 * @lcwrite: Callback to perform local (master port) write of config space. 386 * @cread: Callback to perform network read of config space. 387 * @cwrite: Callback to perform network write of config space. 388 * @dsend: Callback to send a doorbell message. 389 * @pwenable: Callback to enable/disable port-write message handling. 390 * @open_outb_mbox: Callback to initialize outbound mailbox. 391 * @close_outb_mbox: Callback to shut down outbound mailbox. 392 * @open_inb_mbox: Callback to initialize inbound mailbox. 393 * @close_inb_mbox: Callback to shut down inbound mailbox. 394 * @add_outb_message: Callback to add a message to an outbound mailbox queue. 395 * @add_inb_buffer: Callback to add a buffer to an inbound mailbox queue. 396 * @get_inb_message: Callback to get a message from an inbound mailbox queue. 397 * @map_inb: Callback to map RapidIO address region into local memory space. 398 * @unmap_inb: Callback to unmap RapidIO address region mapped with map_inb(). 399 * @query_mport: Callback to query mport device attributes. 400 * @map_outb: Callback to map outbound address region into local memory space. 401 * @unmap_outb: Callback to unmap outbound RapidIO address region. 402 */ 403 struct rio_ops { 404 int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len, 405 u32 *data); 406 int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len, 407 u32 data); 408 int (*cread) (struct rio_mport *mport, int index, u16 destid, 409 u8 hopcount, u32 offset, int len, u32 *data); 410 int (*cwrite) (struct rio_mport *mport, int index, u16 destid, 411 u8 hopcount, u32 offset, int len, u32 data); 412 int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data); 413 int (*pwenable) (struct rio_mport *mport, int enable); 414 int (*open_outb_mbox)(struct rio_mport *mport, void *dev_id, 415 int mbox, int entries); 416 void (*close_outb_mbox)(struct rio_mport *mport, int mbox); 417 int (*open_inb_mbox)(struct rio_mport *mport, void *dev_id, 418 int mbox, int entries); 419 void (*close_inb_mbox)(struct rio_mport *mport, int mbox); 420 int (*add_outb_message)(struct rio_mport *mport, struct rio_dev *rdev, 421 int mbox, void *buffer, size_t len); 422 int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf); 423 void *(*get_inb_message)(struct rio_mport *mport, int mbox); 424 int (*map_inb)(struct rio_mport *mport, dma_addr_t lstart, 425 u64 rstart, u64 size, u32 flags); 426 void (*unmap_inb)(struct rio_mport *mport, dma_addr_t lstart); 427 int (*query_mport)(struct rio_mport *mport, 428 struct rio_mport_attr *attr); 429 int (*map_outb)(struct rio_mport *mport, u16 destid, u64 rstart, 430 u32 size, u32 flags, dma_addr_t *laddr); 431 void (*unmap_outb)(struct rio_mport *mport, u16 destid, u64 rstart); 432 }; 433 434 #define RIO_RESOURCE_MEM 0x00000100 435 #define RIO_RESOURCE_DOORBELL 0x00000200 436 #define RIO_RESOURCE_MAILBOX 0x00000400 437 438 #define RIO_RESOURCE_CACHEABLE 0x00010000 439 #define RIO_RESOURCE_PCI 0x00020000 440 441 #define RIO_RESOURCE_BUSY 0x80000000 442 443 /** 444 * struct rio_driver - RIO driver info 445 * @node: Node in list of drivers 446 * @name: RIO driver name 447 * @id_table: RIO device ids to be associated with this driver 448 * @probe: RIO device inserted 449 * @remove: RIO device removed 450 * @shutdown: shutdown notification callback 451 * @suspend: RIO device suspended 452 * @resume: RIO device awakened 453 * @enable_wake: RIO device enable wake event 454 * @driver: LDM driver struct 455 * 456 * Provides info on a RIO device driver for insertion/removal and 457 * power management purposes. 458 */ 459 struct rio_driver { 460 struct list_head node; 461 char *name; 462 const struct rio_device_id *id_table; 463 int (*probe) (struct rio_dev * dev, const struct rio_device_id * id); 464 void (*remove) (struct rio_dev * dev); 465 void (*shutdown)(struct rio_dev *dev); 466 int (*suspend) (struct rio_dev * dev, u32 state); 467 int (*resume) (struct rio_dev * dev); 468 int (*enable_wake) (struct rio_dev * dev, u32 state, int enable); 469 struct device_driver driver; 470 }; 471 472 #define to_rio_driver(drv) container_of(drv,struct rio_driver, driver) 473 474 union rio_pw_msg { 475 struct { 476 u32 comptag; /* Component Tag CSR */ 477 u32 errdetect; /* Port N Error Detect CSR */ 478 u32 is_port; /* Implementation specific + PortID */ 479 u32 ltlerrdet; /* LTL Error Detect CSR */ 480 u32 padding[12]; 481 } em; 482 u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)]; 483 }; 484 485 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 486 487 /* 488 * enum rio_write_type - RIO write transaction types used in DMA transfers 489 * 490 * Note: RapidIO specification defines write (NWRITE) and 491 * write-with-response (NWRITE_R) data transfer operations. 492 * Existing DMA controllers that service RapidIO may use one of these operations 493 * for entire data transfer or their combination with only the last data packet 494 * requires response. 495 */ 496 enum rio_write_type { 497 RDW_DEFAULT, /* default method used by DMA driver */ 498 RDW_ALL_NWRITE, /* all packets use NWRITE */ 499 RDW_ALL_NWRITE_R, /* all packets use NWRITE_R */ 500 RDW_LAST_NWRITE_R, /* last packet uses NWRITE_R, others - NWRITE */ 501 }; 502 503 struct rio_dma_ext { 504 u16 destid; 505 u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */ 506 u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */ 507 enum rio_write_type wr_type; /* preferred RIO write operation type */ 508 }; 509 510 struct rio_dma_data { 511 /* Local data (as scatterlist) */ 512 struct scatterlist *sg; /* I/O scatter list */ 513 unsigned int sg_len; /* size of scatter list */ 514 /* Remote device address (flat buffer) */ 515 u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */ 516 u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */ 517 enum rio_write_type wr_type; /* preferred RIO write operation type */ 518 }; 519 520 static inline struct rio_mport *dma_to_mport(struct dma_device *ddev) 521 { 522 return container_of(ddev, struct rio_mport, dma); 523 } 524 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ 525 526 /** 527 * struct rio_scan - RIO enumeration and discovery operations 528 * @owner: The module owner of this structure 529 * @enumerate: Callback to perform RapidIO fabric enumeration. 530 * @discover: Callback to perform RapidIO fabric discovery. 531 */ 532 struct rio_scan { 533 struct module *owner; 534 int (*enumerate)(struct rio_mport *mport, u32 flags); 535 int (*discover)(struct rio_mport *mport, u32 flags); 536 }; 537 538 /** 539 * struct rio_scan_node - list node to register RapidIO enumeration and 540 * discovery methods with RapidIO core. 541 * @mport_id: ID of an mport (net) serviced by this enumerator 542 * @node: node in global list of registered enumerators 543 * @ops: RIO enumeration and discovery operations 544 */ 545 struct rio_scan_node { 546 int mport_id; 547 struct list_head node; 548 struct rio_scan *ops; 549 }; 550 551 /* Architecture and hardware-specific functions */ 552 extern int rio_mport_initialize(struct rio_mport *); 553 extern int rio_register_mport(struct rio_mport *); 554 extern int rio_unregister_mport(struct rio_mport *); 555 extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int); 556 extern void rio_close_inb_mbox(struct rio_mport *, int); 557 extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int); 558 extern void rio_close_outb_mbox(struct rio_mport *, int); 559 extern int rio_query_mport(struct rio_mport *port, 560 struct rio_mport_attr *mport_attr); 561 562 #endif /* LINUX_RIO_H */ 563